bag

Abstract

Provided is a bag capable of easily and stably holding a container with a simple operation and greatly reducing wetting of the bag with a liquid even when a beverage leaks from the container. [Problem] [Solution] A bag includes a main body that has a bottom portion and a peripheral wall portion connected to the bottom portion at a peripheral edge of the bottom portion, and has a space portion that is surrounded by the bottom portion and the peripheral wall portion and is capable of storing contents, and an opening portion through which the contents are inserted into the space portion, the main body is provided with a position restricting member having a restriction wall portion that restricts movement of the contents inside the space portion, the position restricting member is bonded to at least an inner surface of the peripheral wall portion, and in a case where the contents are placed in the space portion so that the movement is restricted by the restriction wall portion, when a surface facing the content among surfaces of the restriction wall portion is defined as a facing surface, the restriction wall portion is configured to be capable of forming a first shape state where the facing surface forms a concave surface and a second shape state where the facing surface forms a convex surface.

Description

Technical Field

[0001] The present invention relates to a bag.Background Art

[0002] Conventionally, in various stores such as convenience stores and fast-food restaurants, food and drink such as beverages and food are provided in a state of either being placed in a simple container or being wrapped with wrapping paper. Further, in recent years, particularly in convenience stores, in a case where a customer is provided with a beverage such as coffee, the customer often pours the beverage into a container.

[0003] Furthermore, in fast food restaurants, there has been a rapid increase in a take-out service where a customer takes out the purchased food and drink, and a delivery service where a store staff or other personnel delivers food and drink to a location specified in advance by a customer. In general, in a case where a customer receives a take-out service or a delivery service, the food and drink are housed in a bag (stored in a bag) and provided to the customer. Note that in the present description, the food and drink housed in the bag may be referred to as "contents" or "products". Bag bodies made of resin or paper-based materials are generally used, and bag bodies having various shapes have been conventionally used. For example, as disclosed in Patent Literatures 1 and 2, a conventionally known bag has a bottom surface portion, a side surface portion, and a housing space (storage space) formed by being surrounded by the bottom surface portion and the side surface portion. The product is housed in the housing space and provided to a customer. However, with the bag bodies disclosed in Patent Literatures 1 and 2, there has been a possibility that a store staff carelessly places a product in the housing space of the bag and provides the product to a customer. In this case, there is a possibility that the customer is provided with the container housed in the housing space in a state where the container easily falls in the housing space. Since the product often includes a beverage stored in a container, in a case where the container falls in the housing space before the customer consumes the beverage, there has also been a possibility that the beverage spills out of the container. In order to solve such a situation, it is conceivable to place a cup holder disclosed in Patent Literature 3 in the housing space of the bag, hold the container with the cup holder, and provide the product to the customer.Citation ListPatent Literature

[0004] Patent Literature 1: JP 3128559 U Patent Literature 2: JP 2022-056066 A Patent Literature 3: JP 2019-038596 A Summary of InventionTechnical Problem

[0005] The cup holder disclosed in Patent Literature 3 includes an opening for holding a container. The container is held by the cup holder when its lower portion is inserted into the opening. However, in a case of a busy store, there is a possibility that a container filled with a beverage is provided to a customer without being firmly inserted into the opening of the cup holder. In this case, since the container is not held by the cup holder, there has been a possibility that the container falls in the housing space of the bag, causing the beverage to spill out of the container and wetting other products housed in the housing space or the bag itself. Therefore, it has been difficult for the cup holder disclosed in Patent Literature 3 to reliably solve the possibility of the container falling inside the bag and the subsequent possibility of the beverage spilling out of the container due to such falling.

[0006] Further, in general, the cup holder is formed separately from the bag. Therefore, when providing a beverage to a customer, the store staff needs to perform an operation of assembling the cup holder before placing the container in the housing space of the bag and further placing the assembled cup holder in the housing space. This may cause a problem that it takes a lot of trouble for the store staff and the operation becomes complicated.

[0007] Further, even if the container is held by the cup holder in the housing space of the bag, there has been a possibility that the container is easily detached from the cup holder due to a shake generated while a customer takes out the product or while a store staff or other personnel delivers the product, and there has also been a possibility that the beverage spills out of the container under an influence of the shake in a state where the container is held by the cup holder. In general, a lid body is attached to an opening formed at an upper end of the container. Therefore, the possibility that the beverage in the container spills out of the container can be reduced. However, when shaking is applied to the container, there is a possibility that the beverage leaks from a gap between the container and the lid body, and it has been difficult to completely eliminate this leakage.

[0008] Further, the cup holder disclosed in Patent Literature 3 is required to have sufficient strength to hold the container inserted into the opening. Therefore, as a material for shape-forming of the cup holder, stiff cardboard or corrugated cardboard are often used. Further, techniques for molding the cup holder are often techniques of folding and shape-forming the material and a pulp molding technique. Cup holders shape-formed with such materials and techniques often have a three-dimensional shape to hold the container. However, it is necessary to consider a stacking property of the cup holder during distribution and storage in the store. Therefore, the cup holder needs to have a planar shape to some extent during distribution and storage in the store. Therefore, the cup holder is required to be deformable from a planar shape to a three-dimensional shape by a simple operation. As described above, since a general cup holder is formed of a paper material having strength such as cardboard, it is necessary to form cuts and / or fold lines in a deformed portion in advance in order to deform the cup holder from a planar shape to a three-dimensional shape by a simple operation. However, when such a cut or the like is formed, there has also been a possibility that the beverage leaking from the container passes through the cut or the like of the cup holder and wets the bag.

[0009] The present invention has been made in view of such problems, and an object of the present invention is to provide a bag capable of easily and stably holding a container with a simple operation and greatly reducing wetting of the bag with a liquid even when a beverage leaks from the container.Solution to Problem

[0010] The gist of the present invention is the following inventions (1) to (108). (1) A bag including a main body that includes a bottom portion and a peripheral wall portion connected to the bottom portion at a peripheral edge of the bottom portion, and forms a space portion that is surrounded by the bottom portion and the peripheral wall portion and is capable of storing contents, and an opening portion through which the contents are inserted into the space portion, in which the main body is provided with a position restricting member having a restriction wall portion that restricts movement of the contents in an interior of the space portion, and the position restricting member is bonded to at least an inner surface of the peripheral wall portion, and in a case where the contents are placed in the space portion so that the movement is restricted by the restriction wall portion, when a surface facing the contents among surfaces of the restriction wall portion is defined as a facing surface, the restriction wall portion is configured to be capable of forming at least a first shape state where the facing surface forms a concave surface and a second shape state different from the first shape state. (2) The bag according to (1), in which the inner surface of the peripheral wall portion has at least one corner portion extending from the bottom portion toward the opening portion, and the position restricting member covers at least a part of at least one of the corner portions in a case where the restriction wall portion is in the second shape state. (3) The bag according to (2), in which the peripheral wall portion has a pair of wall surface portions facing each other and a pair of side wall surface portions facing each other, and each of the wall surface portions is connected to the side wall surface portion at a side end edge of the wall surface portion, and the corner portion is formed at a boundary position between the wall surface portion and the side wall surface portion. (4) The bag according to (3), in which the position restricting member is bonded to the wall surface portion and the side wall surface portion. (5) The bag according to (3), in which in a case where the pair of wall surface portions are defined as a first wall surface portion and a second wall surface portion, a main body gusset portion that changes a separation distance between the first wall surface portion and the second wall surface portion is formed on the pair of side wall surface portions. (6) The bag according to (1), in which the position restricting member further includes an inner bottom portion that supports the contents from below in the interior of the space portion. (7) The bag according to (6), in which the inner bottom portion has a gusset. (8) The bag according to (1), in which the second shape state is a state where a convex surface is formed on the facing surface such that the restriction wall portion extends along the inner surface of the peripheral wall portion. (9) The bag according to (1), in which the position restricting member has an intervening wall that is in surface contact with an inner surface of the peripheral wall portion and is positioned between the peripheral wall portion and the restriction wall portion, and the intervening wall is bonded to at least the inner surface of the peripheral wall portion. (10) The bag according to (9), in which in a case where the restriction wall portion is in the second shape state, a position of a lower end of the restriction wall portion exists at a position above a position of a lower end of the intervening wall. (11) The bag according to (10), in which a gap space portion is formed between the intervening wall and the peripheral wall portion. (12) The bag according to (1), in which a folded-back portion is formed at an upper end of the restriction wall portion. (13) The bag according to (1), in which a reinforcing material is provided at an upper end of the restriction wall portion. (14) The bag according to (1), in which an upper end of the restriction wall portion is provided with a reinforcing material, and the upper end of the restriction wall has a folded-back portion, and the folded-back portion is formed to cover the reinforcing material. (15) The bag according to (1), in which the peripheral wall portion has a pair of wall surface portions facing each other, and in a case where the pair of wall surface portions are defined as a first wall surface portion and a second wall surface portion, a lid portion is formed at an upper end of the first wall surface portion so as to be capable of covering an upper end of the second wall surface portion, and the lid portion is provided with an adhesive disposing portion where an adhesive capable of adhering to the second wall surface portion is disposed in a state where the upper end of the second wall surface portion is covered with the lid portion. (16) The bag according to (15), in which a gripping portion is provided at a predetermined position of the first wall surface portion. (17) The bag according to (16), in which the gripping portion rises upward in a case where the upper end of the second wall surface portion is covered with the lid portion. (18) The bag according to (15), in which the first wall surface portion is provided with a weakened portion at a position avoiding the lid portion or on a portion of the lid portion avoiding the adhesive disposing portion. (19) The bag according to (1), in which the position restricting member has waterproofness. (20) The bag according to (1), in which the main body is formed of a paper-based material. (21) The bag according to (1), in which a waterproof layer is provided on an upper surface side of the bottom portion. (22) The bag according to (1), in which the contents are a container, and in a case where the contents are placed in the space portion, a gap exists between at least a part of an upper end portion of the restriction wall portion and an outer peripheral surface of the container. (23) The bag according to (1), in which the second shape state is a state where the facing surface forms a convex surface. (24) The bag according to (6), in which the inner bottom portion and the restriction wall portion are continuously connected. (25) The bag according to (6), in which in a case where the restriction wall portion of the position restricting member is in the first shape state, at least a part of the inner bottom portion has an inclined surface inclined downward in a direction approaching the peripheral wall portion from a boundary position between the inner bottom portion and the restriction wall portion. (26) The bag according to (15), in which a release paper is provided so as to cover the adhesive disposing portion. (27) The bag according to (26), in which the release paper is provided with a display portion on a side of an exposed surface of the release paper. (28) A bag including a main body that includes a bottom portion and a peripheral wall portion connected to the bottom portion at a peripheral edge of the bottom portion, and forms a space portion that is surrounded by the bottom portion and the peripheral wall portion and is capable of storing contents, and an opening portion through which the contents are inserted into the space portion, in which the peripheral wall portion has a first wall surface portion and a second wall surface portion as a pair of wall surface portions facing each other, and an adhesive member having a first adhesive surface forming portion and a second adhesive surface forming portion is attached to an outer surface of the peripheral wall portion, and the first adhesive surface forming portion is attached to a predetermined region of an outer surface of the first wall surface portion, and at least a part of the second adhesive surface forming portion is configured to be capable of adhering to an outer surface of the second wall surface portion, in a case where a bent structure is formed that is defined by a portion formed by bending the first wall surface portion and the second wall surface portion so that the outer surface of the first wall surface portion and the outer surface of the second wall surface portion face each other in a state where a predetermined portion on an upper end side of the first wall surface portion and a predetermined portion on an upper end side of the second wall surface portion are overlapped with each other, and in a case where the bent structure is not formed, adhesion of the second adhesive surface forming portion to the outer surface of the peripheral wall portion is avoided. (29) The bag according to (28), in which in a case where the second adhesive surface forming portion is adhered to the peripheral wall portion, a grippable gap can be formed between a first peripheral wall portion forming portion that forms the bent structure and a second peripheral wall portion forming portion excluding the first peripheral wall portion forming portion, in the peripheral wall portion. (30) The bag according to (28), in which in a case where the bent structure is formed, the second adhesive surface forming portion is configured to be capable of adhering to the first wall surface portion and the second wall surface portion. (31) The bag according to (28), in which the bent structure is defined by a portion formed by bending the first wall surface portion and the second wall surface portion toward a side of the second wall surface portion so that the outer surface of the first wall surface portion and the outer surface of the second wall surface portion face each other. (32) The bag according to (28), in which the bent structure is defined by a portion formed by bending the first wall surface portion and the second wall surface portion toward a side of the first wall surface portion so that the outer surface of the first wall surface portion and the outer surface of the second wall surface portion face each other. (33) The bag according to (28), in which the opening portion is hidden in the bent structure. (34) The bag according to (28), in which a peeling member having peelability is attached so as to cover the second adhesive surface forming portion. (35) The bag according to (34), in which the peeling member is configured to be prevented from being completely separated from the adhesive member. (36) A bag including a main body that includes a bottom portion and a peripheral wall portion connected to the bottom portion at a peripheral edge of the bottom portion, and forms a space portion that is surrounded by the bottom portion and the peripheral wall portion and is capable of storing contents, and an opening portion through which the contents are inserted into the space portion, in which the peripheral wall portion has a first wall surface portion and a second wall surface portion as a pair of wall surface portions facing each other, and a seal sheet detachably provided with a seal member having an adhesive surface forming portion is attached to an outer surface of the peripheral wall portion, and in a case where a bent structure is formed that is defined by a portion formed by bending the first wall surface portion and the second wall surface portion so that the outer surface of the first wall surface portion and an outer surface of the second wall surface portion face each other in a state where a predetermined portion on an upper end side of the first wall surface portion and a predetermined portion on an upper end side of the second wall surface portion are overlapped with each other, the seal member is disposed so as to straddle a lower end of the bent structure, and is configured to be capable of adhering to the peripheral wall portion in a state where the adhesive surface forming portion faces the first wall surface portion and the second wall surface portion, and in a case where the seal member is adhered to the peripheral wall portion, a grippable gap can be formed between a first peripheral wall portion forming portion that forms the bent structure and a second peripheral wall portion forming portion excluding the first peripheral wall portion forming portion, in the peripheral wall portion. (37) The bag according to (36), in which the seal member has a through hole, and the through hole is configured to be capable of exposing the gap from the through hole in a case where the seal member is adhered to the peripheral wall portion. (38) A bag including a main body that includes a bottom portion and a peripheral wall portion connected to the bottom portion at a peripheral edge of the bottom portion, and forms a space portion that is surrounded by the bottom portion and the peripheral wall portion and is capable of storing contents, and an opening portion through which the contents are inserted into the space portion, in which the peripheral wall portion has a first wall surface portion and a second wall surface portion as a pair of wall surface portions facing each other, and the peripheral wall portion has a small piece portion having an adhesive adhering surface on which an adhesive material is disposed, and the small piece portion has a fixed end fixed to the peripheral wall portion and a free end displaceable relative to the peripheral wall portion, and the free end of the small piece portion can be rotated about at least the fixed end as an axis, and a peeling enabling portion is provided that has a small piece portion opposing surface at a position where the small piece portion opposing surface can face the adhesive adhering surface and can be removably adhered to the small piece portion on the small piece portion opposing surface, and the position where the peeling enabling portion is provided is a position where exposure of the main body to the outside is avoided, and in a state where at least a part of the small piece portion is peeled off from the peeling enabling portion and bent, the small piece portion can be adhered to the peripheral wall portion in a region of the adhesive adhering surface so as to prevent movement that separates the first wall surface portion and the second wall surface portion from each other. (39) The bag according to (38), in which an adhesive element piece formed separately from the peripheral wall portion is adhered to the peripheral wall portion, and a part of the adhesive element piece forms the small piece portion. (40) The bag according to (38), in which the peeling enabling portion is formed separately from the peripheral wall portion and is formed of a release paper. (41) The bag according to (40), in which an adhesive element piece formed separately from the peripheral wall portion is adhered to the peripheral wall portion, and a part of the adhesive element piece forms the small piece portion, and a surface of the release paper opposite to the small piece portion opposing surface is adhered to the adhesive element piece. (42) The bag according to (40), in which an adhesive element piece formed separately from the peripheral wall portion is adhered to the peripheral wall portion, and a part of the adhesive element piece forms the small piece portion, and the adhesive element piece is adhered to an outer surface side of the peripheral wall portion, and the release paper is adhered to an inner surface side of the peripheral wall portion. (43) The bag according to (38), in which the small piece portions and the peeling enabling portions are provided at a plurality of locations, respectively, and each of the peeling enabling portions is provided at a position corresponding to each of the small piece portions. (44) The bag according to (38), in which a tab configured to be grippable extends on a side of the free end of the small piece portion. (45) The bag according to (1), in which the main body has at least one corner portion extending from the bottom portion toward the opening portion on the inner surface of the peripheral wall portion, and the main body is constituted by a folded structure formed by folding a blank material made of a paper-based material, and the position restricting member is bonded to an inner surface side of the folded structure, and the blank material includes a blank material upper edge portion forming the opening portion, and a blank material lower edge portion formed on an opposite end side to the blank material upper edge portion, a first blank material side end portion and a second blank material side end portion as blank material side end portions that are located on opposite end sides and are connected to the blank material upper edge portion and the blank material lower edge portion, and a first overlapping structure corresponding portion defined by a predetermined portion of the first blank material side end portion and a second overlapping structure corresponding portion defined by a predetermined portion of the second blank material side end portion, as overlapping structure corresponding portions for bonding a predetermined portion inward from the first blank material side end portion and a predetermined portion inward from the second blank material side end portion to each other, and the folded structure includes a side end adhesive portion that adheres the first overlapping structure corresponding portion and the second overlapping structure corresponding portion to each other, and the first overlapping structure corresponding portion and the second overlapping structure corresponding portion are positioned in order from the inner surface side of the folded structure, and in the blank material, in a case where a region intended to face the position restricting member is defined as an intended facing region, a position where the blank material is folded at a portion corresponding to the corner portion is defined as a corner portion corresponding bending position, a region of the region of the first overlapping structure corresponding portion that is directed to the inside of the folded structure is defined as a first inward region, and a region of the region of the second overlapping structure corresponding portion that is directed to the inside of the folded structure is defined as a second inward region, at least one of the intended facing regions is a region avoiding the second inward region, is a region crossing the corner portion corresponding bending position, and is determined such that one side end edge of two side end edges of the intended facing region is located in the first inward region. (46) The bag according to (45), in which in the blank material, in a case where a portion of the first overlapping structure corresponding portion corresponding to the side end adhesive portion is defined as an adhesive portion corresponding portion (A), and a portion corresponding to the portion bonding the position restricting member and the folded structure is defined as an adhesive portion corresponding portion (B), at least a part of the adhesive portion corresponding portion (A) also serves as at least a part of the adhesive portion corresponding portion (B). (47) The bag according to (45), in which the main body has a handle structure adhered to the folded structure, and in the blank material, in a case where a region corresponding to the region to be adhered to the handle structure is defined as a handle adhesion region, the handle adhesion region is defined as a region that does not cross an end edge of the blank material side end portion in a state of the folded structure. (48) The bag according to (1), in which the peripheral wall portion has a pair of wall surface portions facing each other and a pair of side wall surface portions facing each other, and each of the wall surface portions is connected to the side wall surface portion at a side end edge of the wall surface portion, and the main body is constituted by a folded structure formed by folding a blank material made of a paper-based material, and the position restricting member is bonded to an inner surface side of the folded structure, and the blank material includes a blank material upper edge portion forming the opening portion and a blank material lower edge portion formed on an opposite end side to the blank material upper edge portion, and the folded structure includes a pair of first inward-folded portions having a structure in which a pair of first lower portions defined by a portion from a lower end of the portion of the blank material constituting each of the pair of side wall surface portions to the blank material lower edge portion is folded inward of the folded structure, and a pair of second inward-folded portions having a structure in which a pair of second lower portions defined by a portion from a lower end of the portion of the blank material constituting the pair of wall surface portions to the blank material lower edge portion is folded inward of the folded structure on a lower surface side of the first lower portion, and includes an overlapping structure portion defined as a portion where the pair of second inward-folded portions overlap each other, and a lower end folded-back portion formed by folding back the blank material lower edge portion is formed in at least one of the pair of second inward-folded portions, and at least a part of the lower end folded-back portion is disposed in the overlapping structure portion. (49) The bag according to (48), in which the second inward-folded portion has an obliquely folded portion formed by folding back the blank material with a straight line extending obliquely relative to a lower end edge of the blank material lower edge portion as a folding axis, and the first inward-folded portion is connected to the obliquely folded portion of the second inward-folded portion, and a width of the second inward-folded portion decreases toward a lower end of the blank material lower edge portion. (50) The bag according to (1), in which at least in the second shape state, the position restricting member has a folded-back structure portion on the restriction wall portion. (51) The bag according to (1), in which the peripheral wall portion has a first wall surface portion and a second wall surface portion as a pair of wall surface portions facing each other, and at least one position restricting member is bonded to the first wall surface portion and the second wall surface portion. (52) The bag according to (1), in which an inner lining material is provided on an upper surface side of the bottom portion. (53) The bag according to (1), in which the inner lining material is a resin sheet. (54) The bag according to (53), in which the inner lining material covers the bottom portion and a predetermined region on a lower end side of the peripheral wall portion. (55) The bag according to (1), in which the peripheral wall portion has a pair of wall surface portions facing each other and a pair of side wall surface portions facing each other, and in a case where the pair of wall surface portions are defined as a first wall surface portion and a second wall surface portion, a main body gusset portion that changes a separation distance between the first wall surface portion and the second wall surface portion is formed in the pair of side wall surface portions, and a deformation restricting structure is provided that is capable of restricting deformation of the main body gusset portion in a case where the main body gusset portion is folded at a predetermined position of the side wall portion. (56) The bag according to (1), in which a handle portion is provided in the main body, and the handle portion has a handle sheet portion and a penetrating portion penetrating the handle sheet portion, and a reinforcing portion is provided so as to face a predetermined region at least above the penetrating portion on a surface of the handle sheet portion. (57) The bag according to (56), in which the reinforcing portion has a structure in which a reinforcing material is bonded to a surface of the handle sheet portion, and the reinforcing material is a resin sheet. (58) The bag according to (56), in which the reinforcing material is partially bonded to the handle sheet portion. (59) The bag according to (56), in which the reinforcing portion has a structure in which a reinforcing material is bonded to a surface of the handle sheet portion, and the reinforcing material is a nonwoven fabric. (60) The bag according to (59), in which the reinforcing material is partially bonded to the handle sheet portion, and the nonwoven fabric includes long fibers. (61) The bag according to (56), in which the reinforcing portion has a folded-back structure on an upper end side of the handle sheet portion, and a reinforcing film is interposed between portions of the handle sheet portion facing each other that forms the folded-back structure. (62) The bag according to (56), in which the handle sheet portion is formed integrally with the main body. (63) The bag according to (56), in which the handle sheet portion is formed separately from the main body, and the handle sheet portion and the main body are bonded at a portion inward from a side end of the handle sheet portion. (64) The bag according to (56), in which the peripheral wall portion has a pair of wall surface portions facing each other, and the handle sheet portion is provided on each of the pair of wall surface portions, and a width of the handle sheet portion is smaller than a width of a side wall portion. (65) The bag according to (56), in which the peripheral wall portion has a pair of wall surface portions facing each other, and the handle sheet portion is provided on each of the pair of wall surface portions, and an adhesive is disposed on the handle sheet portion provided on at least one side wall portion. (66) The bag according to (1), in which a handle portion is provided on the main body, and the handle portion includes a handle support sheet portion, a notch portion that is cut out from an upper end edge of the handle support sheet portion to a predetermined position, a handle material disposed so as to cross at least two locations of a contour portion of the notch portion, and a covering material covering a part of the handle material, and the handle support sheet portion and the covering material sandwich the handle material and adhere to the handle material, and the adhesive auxiliary sheet is provided between the handle support sheet portion and the covering material. (67) The bag according to (1), in which the peripheral wall portion has a pair of wall surface portions facing each other and a pair of side wall surface portions facing each other, and each of the wall surface portions is connected to the side wall surface portion at a side end edge of the wall surface portion, and the main body is constituted by a folded structure formed by folding a blank material made of a paper-based material, and the position restricting member is bonded to an inner surface side of the folded structure, and the position restricting member is configured as a continuous belt shape disposed from one side end edge of the blank material toward the other side end edge, and is bonded to the blank material at a predetermined position. (68) The bag according to (67), in which a restricting member bonding portion that bonds the position restricting member and the blank material is constituted by a plurality of unit bonding portions provided independently of each other at different positions, at least one of the restriction wall portions is formed by a portion sandwiched by at least a pair of unit bonding portions of adjacent unit bonding portions, and a length of an upper end edge of the restriction wall portion is longer than a length of a lower end edge of the restriction wall portion. (69) The bag according to (1), in which the position restricting member has water absorbency. (70) The bag according to (1), in which the position restricting member has a large number of restriction wall penetrating portions. (71) The bag according to (1), in which the position restricting member is constituted by a fiber bundle in which a large number of long fibers are arranged. (72) The bag according to (1), in which an area of the facing surface of the restriction wall portion is larger than an area of a region of a surface of the peripheral wall portion corresponding to the facing surface. (73) The bag according to (1), in which in the second shape state, an overlapping portion is formed in the restriction wall portion. (74) The bag according to (1), in which the main body is configured to be capable of deforming a three-dimensional structure of the main body from a first structure to a second structure, and in a case where the main body is in the first structure, the main body has a pair of folded wall surface portions folded so as to form a gusset portion from an upper end to a lower end, and opposing wall surface portions facing each other with the folded wall surface portions interposed therebetween, and has a lower end edge bonding portion that is connected to the folded wall surface portion at each of two side end edges of each of the opposing wall surface portions, and bonds a lower end edge portion of the opposing wall surface portion and a lower end edge portion of the folded wall surface portion facing the first lower end edge portion, and in a case where the main body is in the second structure, the main body has a main body gusset portion on the peripheral wall portion, the bottom portion, and the side wall surface portion, and the peripheral wall portion has a pair of wall surface portions facing each other and a pair of side wall surface portions facing each other, the wall surface portion is connected to the side wall surface portion at two side end edges of each of the wall surface portions, and a corner portion is provided at a boundary between the wall surface portion and the side wall surface portion, and the three-dimensional structure of the main body is deformed from the first structure to the second structure by folding the main body so as to satisfy the following first to fourth conditions. Condition 1: The gusset portion of the first structure is expanded; Condition 2: The folded wall surface portion is folded inward with a predetermined reference position from a lower end side toward an upper side of each of the folded wall surface portions as a first folding axis, so that a portion of the folded wall surface portion above the reference position is defined as the side wall surface portion; Condition 3: In a portion of the folded wall surface portion below the reference position, a portion of the folded wall surface portion is folded inward with a straight line in an oblique direction from an outer end of the folded wall surface portion toward an inner end of the lower end edge bonding portion as a second folding axis; and Condition 4: The opposing wall surface portion is folded with a straight line connecting two positions connected to the reference position at each of two side end edges of the opposing wall surface portion as a third folding axis, so that a portion of the opposing wall surface portion above the folding axis is defined as the wall surface portion. (75) The bag according to (74), in which a film material is bonded to at least the lower end edge portion of the opposing wall surface portion. (76) The bag according to (74), in which a crease is imparted at a position corresponding to at least one of the first folding axis to the third folding axis. (77) The bag according to (1) including a suspension tool receiving structure. Advantageous Effects of Invention

[0011] According to the present invention, there is provided a bag capable of easily and stably holding a container with a simple operation, and greatly reducing wetting of the bag with a liquid even when a beverage leaks from the container.Brief Description of Drawings

[0012] Fig. 1A is a plan view (top view) for describing an example of a first embodiment. Fig. 1B is a front view for describing an example of the first embodiment. Fig. 1C is a side view for describing an example of the first embodiment. Fig. 2A is a plan view for describing an example of the first embodiment. Fig. 2B is a front view for describing an example of a usage state of a bag according to the first embodiment. Fig. 3A is a cross-sectional view schematically illustrating a state of a cross section taken along an A-A line in Fig. 1A. Fig. 3B is a cross-sectional view schematically illustrating a state of a cross section taken along a B-B line in Fig. 2B. Figs. 4A to 4C are diagrams for describing a manufacturing process of the bag according to the first embodiment. Figs. 5A to 5C are diagrams for describing a manufacturing process of the bag according to the first embodiment. Fig. 5D is a partial cross-sectional view schematically illustrating an example in a case where a waterproof sheet as a waterproof layer is provided at a bottom portion. Figs. 6A to 6C are plan views for describing an example of the first embodiment. Figs. 7A to 7D are plan views for describing an example of the first embodiment. Fig. 8A is a plan view (top view) for describing an example of a second embodiment. Fig. 8B is a front view for describing an example of the second embodiment. Fig. 8C is a side view for describing an example of the second embodiment. Fig. 9A is a cross-sectional view schematically illustrating a state of a cross section taken along a C-C line in Fig. 8A. Fig. 9B is a partial cross-sectional view for describing an example of the usage state of a bag according to the second embodiment. Fig. 10 is a partial cross-sectional view for describing an example of the second embodiment. Figs. 11A and 11B are plan views for describing an example of a position restricting member. Figs. 12A and 12B are diagrams for describing examples of a bonding portion between an intervening wall of the position restricting member and a peripheral wall portion. Fig. 13A is a plan view (top view) for describing an example of a third embodiment. Fig. 13B is a front view for describing an example of the third embodiment. Fig. 13C is a side view for describing an example of the third embodiment. Fig. 14A is a cross-sectional view schematically illustrating a state of a cross section taken along a D-D line in Fig. 13A. Fig. 14B is a partial cross-sectional view for describing an example of the usage state of a bag according to the third embodiment. Figs. 15A to 15C are partial cross-sectional views for describing an example of the third embodiment. Fig. 16 is a partial cross-sectional view for describing an example of the usage state of the bag according to the third embodiment. Figs. 17A and 17B are partial cross-sectional views for describing an example of the third embodiment. Figs. 18A, 18B, and 18C are partial cross-sectional views for describing an example of a fourth embodiment. Figs. 19A and 19B are partial cross-sectional views for describing an example of the fourth embodiment. Figs. 20A, 20B, and 20C are partial cross-sectional views for describing an example of the fourth embodiment. Fig. 21A is a plan view (top view) for describing an example of a fifth embodiment. Fig. 21B is a front view for describing an example of the fifth embodiment. Fig. 21C is a side view for describing an example of the fifth embodiment. Fig. 22A is a plan view (top view) for describing an example of the usage state of a bag according to the fifth embodiment. Fig. 22B is a front view for describing an example of the usage state of the bag according to the fifth embodiment. Fig. 22C is a side view for describing an example of the usage state of the bag according to the fifth embodiment. Fig. 23A is a plan view (top view) for describing an example of the fifth embodiment. Fig. 23B is a front view for describing an example of the fifth embodiment. Fig. 23C is a side view for describing an example of the fifth embodiment. Fig. 24A is a plan view (top view) for describing an example of the usage state of the bag according to the fifth embodiment. Fig. 24B is a front view for describing an example of the usage state of the bag according to the fifth embodiment. Fig. 24C is a side view for describing an example of the usage state of the bag according to the fifth embodiment. Fig. 25A is a front view for describing an example of the fifth embodiment. Fig. 25B is a perspective view for describing an example of the usage state of the bag according to the fifth embodiment. Fig. 26 is an exploded perspective view for describing an example of the fifth embodiment. Fig. 27A is a plan view (top view) for describing an example of a seventh embodiment. Fig. 27B is a rear view for describing an example of the seventh embodiment. Fig. 27C is a side view for describing an example of the seventh embodiment. Fig. 28A is a perspective view for describing an example of the seventh embodiment. Fig. 28B is a cross-sectional view schematically illustrating a state of a cross section taken along an A1-A1 line in Fig. 28A, and an enlarged cross-sectional view illustrating a state where a portion indicated by a dashed line XP1 is enlarged. Fig. 29A is a perspective view for describing an example of the seventh embodiment. Fig. 29B is a cross-sectional view schematically illustrating a state of a cross section taken along an A2-A2 line in Fig. 29A. Fig. 30A is a perspective view for describing an example of the seventh embodiment. Fig. 30B is a cross-sectional view schematically illustrating a state of a cross section taken along an A3-A3 line in Fig. 30A. Fig. 31 is a perspective view for describing an example of a main body. Fig. 32 is a perspective view for describing an example of the main body. Fig. 33A is a perspective view for describing an example of an eighth embodiment. Fig. 33B is a perspective view for describing a state where a bent structure is formed according to an example of the eighth embodiment. Fig. 34A is a perspective view for describing an example of the eighth embodiment. Fig. 34B is a perspective view for describing a state where a bent structure is formed according to an example of the eighth embodiment. Fig. 35A is a perspective view for describing an example of the eighth embodiment. Fig. 35B is a perspective view for describing a state where a bent structure is formed according to an example of the eighth embodiment. Fig. 36A is a perspective view for describing an example of the seventh embodiment. Fig. 36B is a perspective view for describing a state where a bent structure is formed according to an example of the seventh embodiment. Fig. 37B is a cross-sectional view schematically illustrating a state of a cross section taken along a B1-B1 line in Fig. 33A. Fig. 37B is a cross-sectional view schematically illustrating a state of a cross section taken along a B2-B2 line in Fig. 33A. Fig. 38A is a front view for describing an example of a ninth embodiment. Fig. 38B is a perspective view for describing an example of the usage state of a bag according to the ninth embodiment. Fig. 39A is a plan view (top view) for describing an example of a tenth embodiment. Fig. 39B is a front view for describing an example of the tenth embodiment. Fig. 39C is a side view for describing an example of the tenth embodiment. Fig. 40A is a plan view (top view) for describing an example of the usage state of a bag according to the tenth embodiment. Fig. 40B is a front view for describing an example of the usage state of the bag according to the tenth embodiment. Fig. 40C is a side view for describing an example of the usage state of the bag according to the tenth embodiment. Fig. 41A is a plan view (top view) for describing an example of the tenth embodiment. Fig. 41B is a front view for describing an example of the tenth embodiment. Fig. 41C is a side view for describing an example of the tenth embodiment. Fig. 42A is a plan view (top view) for describing an example of Modification 2 of the tenth embodiment. Fig. 42B is a front view for describing an example of Modification 2 of the tenth embodiment. Fig. 42C is a side view for describing an example of Modification 2 of the tenth embodiment. Fig. 43A is a plan view (top view) for describing an example of the usage state of a bag according to Modification 2 of the tenth embodiment. Fig. 43B is a front view for describing an example of the usage state of the bag according to Modification 2 of the tenth embodiment. Fig. 43C is a side view for describing an example of the usage state of the bag according to Modification 2 of the tenth embodiment. Fig. 44A is a plan view (top view) for describing an example of Modification 2 of the tenth embodiment. Fig. 44B is a front view for describing an example of Modification 2 of the tenth embodiment. Fig. 44C is a side view for describing an example of Modification 2 of the tenth embodiment. Fig. 45A is a plan view (top view) for describing an example of the usage state of the bag according to Modification 2 of the tenth embodiment. Fig. 45B is a front view for describing an example of the usage state of the bag according to Modification 2 of the tenth embodiment. Fig. 45C is a side view for describing an example of the usage state of the bag according to Modification 2 of the tenth embodiment. Fig. 46A is a perspective view for describing an example of the usage state of the bag according to Modification 2 of the tenth embodiment. Fig. 46B is a perspective view for describing an example of the usage state of the bag according to Modification 2 of the tenth embodiment. Fig. 47A is a front view for describing an example of Modification 2 of the tenth embodiment. Fig. 47B is a perspective view for describing an example of the usage state of the bag according to Modification 2 of the tenth embodiment. Fig. 5A is a diagram for describing an example of a blank material for forming the bag according to the second embodiment. Fig. 5B is a cross-sectional view schematically illustrating a state of a longitudinal cross section taken along a D1-D1 line in Fig. 5A. Fig. 49 is a diagram for describing an example of a blank material for forming the bag according to the first embodiment. Fig. 50A is a diagram illustrating a part of the bag according to the first embodiment, and is a diagram for describing an example of the bag. Fig. 50B is a cross-sectional view schematically illustrating a state of a longitudinal cross section taken along a D2-D2 line in Fig. 50A. Fig. 51A is a diagram illustrating a part of the bag according to the first embodiment, and is a diagram for describing an example of the bag. Fig. 51B is a cross-sectional view schematically illustrating a state of a longitudinal cross section taken along a D3-D3 line in Fig. 51A. Fig. 52A is a diagram illustrating a part of a container that can be placed in the bag according to the first embodiment. Fig. 52B is a cross-sectional view schematically illustrating a state where the container of Fig. 52A is stored in the bag. Figs. 53A and 53B are diagrams illustrating a step of disposing a position restricting member on a blank material. Fig. 54A is a plan view (top view) for describing an example of an eleventh embodiment. Fig. 54B is a front view for describing an example of the eleventh embodiment. Fig. 54C is a diagram for describing a small piece portion in an example of the eleventh embodiment. Fig. 54D is a cross-sectional view schematically illustrating a state of a cross section corresponding to the cross section taken along an E1-E1 line in Fig. 54B. Fig. 55A is a diagram for describing movement of the small piece portion in an example of the eleventh embodiment. Fig. 55B is a cross-sectional view schematically illustrating a state of a cross section corresponding to the cross section taken along an E2-E2 line in Fig. 55A. Fig. 55C is a side view for describing a state where expansion of an opening portion of the bag is restricted by the small piece portion in an example of the first embodiment. Fig. 55D is a cross-sectional view for schematically describing an adhesion state between the small piece portion and a peripheral wall portion of the bag of Fig. 55C. Fig. 56A is a cross-sectional view for describing an example of a small piece portion and a peeling enabling portion in Modification 1 of the eleventh embodiment. Fig. 56B is a cross-sectional view for describing an example of a small piece portion and a peeling enabling portion in Modification 2 of the eleventh embodiment. Fig. 57A is a plan view (top view) for describing an example of Modification 3 of the eleventh embodiment. Fig. 57B is a front view for describing an example of Modification 3 of the eleventh embodiment. Fig. 57C is a diagram for describing a small piece portion in an example of Modification 3 of the eleventh embodiment. Fig. 57D is a cross-sectional view schematically illustrating a state of a cross section corresponding to the cross section taken along an E3-E3 line in Fig. 57B. Fig. 58A is a diagram for describing the movement of a small piece portion in an example of Modification 3 of the eleventh embodiment. Fig. 58B is a cross-sectional view schematically illustrating a state of a cross section corresponding to the cross section taken along an E4-E4 line in Fig. 58A. Fig. 58C is a side view for describing a state where the expansion of the opening portion of the bag is restricted by the small piece portion in an example of the first embodiment. Fig. 58D is a cross-sectional view for schematically describing the adhesion state between the small piece portion and the peripheral wall portion of the bag of Fig. 58C. Fig. 59A is a plan view (top view) for describing an example of Modification 4 of the eleventh embodiment. Fig. 59B is a front view for describing an example of Modification 4 of the eleventh embodiment. Fig. 59C is a diagram for describing a small piece portion in an example of Modification 4 of the eleventh embodiment. Fig. 59D is a cross-sectional view schematically illustrating a state of a cross section corresponding to the cross section taken along an E5-E5 line in Fig. 59B. Fig. 60A is a diagram for describing the movement of a small piece portion in an example of Modification 4 of the eleventh embodiment. Fig. 60B is a cross-sectional view schematically illustrating a state of a cross section corresponding to the cross section taken along an E6-E6 line in Fig. 60A. Fig. 60C is a side view for describing a state where the expansion of the opening portion of the bag is restricted by the small piece portion in an example of the first embodiment. Fig. 60D is a cross-sectional view for schematically describing the adhesion state between the small piece portion and the peripheral wall portion of the bag of Fig. 60C. Fig. 61A is a plan view (top view) for describing an example of Modification 5 of the eleventh embodiment. Fig. 61B is a front view for describing an example of Modification 5 of the eleventh embodiment. Fig. 61C is a front view for describing an example of Modification 5 of the eleventh embodiment. Fig. 62A is a diagram for describing a tab in an example of Modification 6 of the eleventh embodiment. Fig. 62B is a cross-sectional view schematically illustrating a state of a cross section corresponding to the cross section taken along an E7-E7 line in Fig. 62A. Fig. 63A is a diagram for describing a tab in an example of Modification 6 of the eleventh embodiment. Fig. 63B is a cross-sectional view schematically illustrating a state of a cross section corresponding to the cross section taken along an E8-E8 line in Fig. 63A. Fig. 63C is a cross-sectional view for describing a tab in an example of Modification 6 of the eleventh embodiment. Fig. 64A is a cross-sectional view for describing a receiving portion in an example of a sixth embodiment. Fig. 64B is a cross-sectional view schematically illustrating a state where a container is housed in an example of a bag of the sixth embodiment. Fig. 64C is a cross-sectional view for describing a receiving portion in an example of the sixth embodiment. Fig. 65A is a plan view for describing an example of a bag according to a twelfth embodiment. Fig. 65B is a front view for describing an example of the bag according to the twelfth embodiment. Fig. 65C is a diagram for describing an example of an inner surface bonding piece and a peeling enabling portion provided on the bag according to the twelfth embodiment. Fig. 65D is a cross-sectional view schematically illustrating a state of a cross section taken along a G1-G1 line in Fig. 65B. Fig. 66A is a diagram for describing an example of a state where an inner surface bonding piece provided in the bag according to the twelfth embodiment is separated from a peeling enabling portion. Fig. 66B is a cross-sectional view schematically illustrating a state of a cross section taken along a G2-G2 line in Fig. 66A. Fig. 65C is a side view for describing an example of the bag according to the twelfth embodiment. Fig. 66D is a diagram for describing an example of a state where a wall surface portion is adhered by the inner surface bonding piece provided on the bag according to the twelfth embodiment. Fig. 67A is a plan view for describing an example of a bag according to a thirteenth embodiment. Fig. 67B is a front view for describing an example of the bag according to the thirteenth embodiment. Fig. 67C is a plan view for describing an example of a blank material for forming a folded structure constituting the bag according to the thirteenth embodiment. Figs. 68A, 68B, and 68C are plan views for describing an example of a blank material for forming a folded structure constituting the bag according to the twelfth embodiment. Fig. 69A is a plan view for describing an example of the bag according to the thirteenth embodiment. Fig. 69B is a front view for describing an example of the bag according to the thirteenth embodiment. Fig. 69C is a plan view for describing an example of the blank material for forming the folded structure constituting the bag according to the thirteenth embodiment. Fig. 70A is a plan view for describing an example of a bag according to a fourteenth embodiment. Fig. 70B is a front view for describing an example of the bag according to the fourteenth embodiment. Fig. 70C is a bottom view for describing an example of the bag according to the fourteenth embodiment. Fig. 71A is a plan view for describing an example of a blank material for forming the bag according to the fourteenth embodiment. Fig. 71B is a perspective view for describing a step of manufacturing a bag, and is a perspective view for describing an example of a cylindrical structure. Figs. 72A and 72B are perspective views for describing a step of manufacturing the bag according to the fourteenth embodiment. Fig. 73A is a plan view for describing an example of the blank material for forming the bag according to the fourteenth embodiment. Fig. 73B is a bottom view for describing an example of the bag according to the fourteenth embodiment. Fig. 74A is a plan view for describing an example of a bag according to a fifteenth embodiment. Fig. 74B is a front view for describing an example of the bag according to the fifteenth embodiment. Fig. 74C is a cross-sectional view schematically illustrating a state of a cross section taken along an H1-H1 line in Fig. 74A. Fig. 74D is a plan view for describing an example of the bag according to the fifteenth embodiment. Figs. 75A and 75B are plan views for describing an example of the bag according to the fifteenth embodiment. Figs. 76A and 76B are plan views for describing an example of the bag according to the fifteenth embodiment. Fig. 77A is a plan view illustrating an example of a position restricting member. Fig. 77B is a plan view for describing an example of the bag according to the fifteenth embodiment. Fig. 77C is a cross-sectional view schematically illustrating a state of a cross section taken along an H2-H2 line in Fig. 77B. Fig. 78A is a front view for describing an example of a bag according to a sixteenth embodiment. Fig. 78B is a cross-sectional view schematically illustrating a state of a cross section taken along an I1-I1 line in Fig. 78A. Fig. 78C is a front view for describing an example of the bag according to the sixteenth embodiment. Figs. 75A and 75B are cross-sectional views for describing an example of the bag according to the sixteenth embodiment. Fig. 80A is a front view for describing an example of the bag according to the sixteenth embodiment. Fig. 80B is a cross-sectional view schematically illustrating a state of a cross section taken along an I2-I2 line in Fig. 80A. Fig. 80C is a cross-sectional view for describing the usage state of an example of the bag according to the sixteenth embodiment. Fig. 81 is a plan view for describing an example of a blank material of the bag according to the sixteenth embodiment. Figs. 82A and 82B are partial cross-sectional views for describing an example of a bottom portion of the bag according to the sixteenth embodiment. Fig. 83A is a front view for describing an example of a bag according to a seventeenth embodiment. Fig. 82B is a partial cross-sectional view for describing an example of a bottom portion of the bag according to the seventeenth embodiment. Figs. 84A and 84B are partial cross-sectional views for describing an example of the bottom portion of the bag according to the seventeenth embodiment. Fig. 85A is a perspective view for describing an example of a bag according to an eighteenth embodiment. Fig. 85B is a plan view for describing an example of the bag according to the eighteenth embodiment. Fig. 86A is a perspective view for describing an example of the bag according to the eighteenth embodiment. Fig. 86B is a plan view for describing an example of the bag according to the eighteenth embodiment. Figs. 87A to 87C are plan views for describing an example of the bag according to the eighteenth embodiment. Fig. 88A is a diagram for describing an example of a gusset portion bonding portion. Fig. 88B is a cross-sectional view for describing an example of the gusset portion bonding portion. Fig. 88B is a cross-sectional view for describing an example of the usage state of the gusset portion bonding portion. Figs. 89A to 89B are plan views for describing an example of the bag according to the eighteenth embodiment. Fig. 90A is a cross-sectional view for describing an example of the gusset portion bonding portion. Fig. 90B is a cross-sectional view for describing an example of the usage state of the gusset portion bonding portion. Fig. 91A is a cross-sectional view for describing an example of the gusset portion bonding portion. Fig. 91B is a cross-sectional view for describing an example of the usage state of the gusset portion bonding portion. Fig. 92A is a cross-sectional view for describing an example of the gusset portion bonding portion. Fig. 92B is a cross-sectional view for describing an example of the usage state of the gusset portion bonding portion. Fig. 93 is a perspective view for describing an example of the bag according to the eighteenth embodiment. Fig. 94 is a perspective view for describing an example of the bag according to the eighteenth embodiment. Fig. 95 is a perspective view for describing an example of the bag according to the eighteenth embodiment. Fig. 96 is a perspective view for describing an example of the bag according to the eighteenth embodiment. Fig. 97A is a perspective view for describing an example of a bag according to a nineteenth embodiment. Fig. 97B is a plan view for describing an example of the bag according to the nineteenth embodiment. Fig. 98A is a perspective view for describing an example of a bag according to a twentieth embodiment. Fig. 98B is a plan view for describing an example of the bag according to the twentieth embodiment. Fig. 99A is a front view for describing an example of a bag according to a twenty-first embodiment. Fig. 99B is a side view for describing an example of the bag according to the twenty-first embodiment, and a partially enlarged cross-sectional view for describing the cross section of a handle portion formed by cutting portions XSS1 and XSS2 surrounded by broken lines in a vertical direction so as to pass through a sheet penetrating portion. Fig. 99C is a plan view for describing an example of the bag according to the twenty-first embodiment. Figs. 100A to 100D are partial cross-sectional views for schematically describing a handle portion in an example of the bag according to the twenty-first embodiment. Figs. 101A to 101C are partial cross-sectional views for schematically describing a handle portion in an example of the bag according to the twenty-first embodiment. Figs. 102A to 102C are partial cross-sectional views for schematically describing a handle portion in an example of the bag according to the twenty-first embodiment. Fig. 103A is a front view for describing an example of the bag according to the twenty-first embodiment. Fig. 103B is a plan view for describing an example of the bag according to the twenty-first embodiment. Fig. 104A is a front view for describing an example of the bag according to the twenty-first embodiment. Fig. 104B is a partial cross-sectional view for schematically describing a handle portion in an example of the bag according to the twenty-first embodiment. Fig. 104C is a partial cross-sectional view for schematically describing a handle portion in an example of the bag according to the twenty-first embodiment. Figs. 105A to 105B are partial cross-sectional views for schematically describing a handle portion in an example of the bag according to the twenty-first embodiment. Fig. 106A is a front view for describing an example of the bag according to the twenty-first embodiment. Fig. 106C is a partial cross-sectional view for schematically describing a handle portion in an example of the bag according to the twenty-first embodiment. Fig. 106D is a partial cross-sectional view for schematically describing a handle portion in an example of the bag according to the twenty-first embodiment. Fig. 107A is a partial cross-sectional view for schematically describing a handle portion in an example of the bag according to the twenty-first embodiment. Fig. 107B is a partial cross-sectional view for schematically describing a handle portion in an example of the bag according to the twenty-first embodiment. Fig. 107C is a side view for describing an example of the bag according to the twenty-first embodiment. Fig. 108A is a front view for describing an example of a bag according to a twenty-second embodiment. Fig. 108B is a side view for describing an example of the bag according to the twenty-second embodiment, and a partially enlarged cross-sectional view for describing the cross section of a handle portion formed by cutting portions XSS3 and XSS4 surrounded by broken lines in the vertical direction so as to pass through a sheet penetrating portion. Fig. 108C is a plan view for describing an example of the bag according to the twenty-second embodiment. Figs. 109A to 109B are front views for describing an example of the bag according to the twenty-second embodiment. Fig. 110A is a front view for describing an example of a bag according to a twenty-third embodiment. Fig. 110B is a side view for describing an example of the bag according to the twenty-third embodiment, and a partially enlarged cross-sectional view for describing the cross section of a handle portion formed by cutting portions XSS5 and XSS6 surrounded by broken lines in the vertical direction so as to pass through a sheet penetrating portion. Fig. 110C is a plan view for describing an example of the bag according to the twenty-third embodiment. Fig. 111A is a front view for describing an example of a bag according to the seventeenth embodiment. Fig. 111B is a plan view for describing an example of the bag according to the seventeenth embodiment. Figs. 112A to 112B are diagrams for describing a manufacturing process of a bag according to a twenty-seventh embodiment. Fig. 113A is a front view for describing an example of a bag according to a twenty-fifth embodiment. Fig. 113B is a side view for describing an example of the bag according to the twenty-fifth embodiment, and a partially enlarged cross-sectional view for describing the cross section of a handle portion formed by cutting portions XSS7 and XSS7 surrounded by broken lines in the vertical direction so as to pass through a sheet penetrating portion. Fig. 113C is a plan view for describing an example of the bag according to the twenty-fifth embodiment. Fig. 114A is a front view for describing an example of a bag according to a twenty-sixth embodiment. Fig. 114B is a side view for describing an example of the bag according to the twenty-sixth embodiment. Fig. 114C is a partially enlarged plan view for describing a main part in an example of the bag according to the twenty-sixth embodiment. Fig. 114D is a view for describing a state of an inner surface side of a wall surface portion including a handle installation portion in an example of the bag according to the twenty-sixth embodiment. Fig. 114E is a schematic cross-sectional view schematically illustrating a state of a cross section taken along a J1-J1 line in Fig. 114D. Figs. 115A to 115B are diagrams for describing a manufacturing process of a bag according to a twenty-eighth embodiment. Fig. 116 is a diagram for describing an example of a blank material for forming the bag according to the twenty-eighth embodiment. Fig. 117 is a partial perspective view for describing an example of a position restricting member used for a bag according to a twenty-ninth embodiment. Fig. 118 is a partial perspective view for describing an example of a position restricting member used for a bag according to a thirtieth embodiment. Fig. 119 is a partial perspective view for describing an example of a position restricting member used for a bag according to a thirty-first embodiment. Fig. 120A is a diagram illustrating an example of an uneven roller used in an apparatus for manufacturing the bag according to the thirty-first embodiment. Fig. 120B is a cross-sectional view for describing a usage example of the uneven roller in the manufacturing process of the bag according to the thirty-first embodiment. Fig. 121A is a diagram for describing an example of a blank material for forming the bag according to the thirty-first embodiment. Fig. 121B is a schematic cross-sectional view schematically illustrating a state of a cross section taken along a J2-J2 line in Fig. 121A. Fig. 121C is a diagram for describing an example of the blank material for forming the bag according to the thirty-first embodiment. Fig. 122A is a front view for describing an example of a bag in a case where a bag according to a thirty-second embodiment is in a first structure. Fig. 122B is a diagram for describing an example of the state on a lower end side of the bag in a case where an arrow DE1 is set to the line-of-sight direction in Fig. 122A. Fig. 122C is a diagram for describing an example of the state on an upper end side of the bag in a case where an arrow DE2 is set to the line-of-sight direction in Fig. 122A. Fig. 122C is a side view for describing an example of the bag in a case where the bag according to the thirty-second embodiment is in the first structure. Fig. 123A is a front view for describing an example of the bag in a case where the bag according to the thirty-second embodiment is in a second structure. Fig. 123B is a diagram for describing the state on an upper end of the bag in a case where the bag according to the thirty-second embodiment is in the second structure. Fig. 123C is a side view for describing an example of the bag in a case where the bag according to the thirty-second embodiment is in the second structure. Fig. 124 is a perspective view for describing a state where an operation of folding the portion of a region XS surrounded by the broken line in Fig. 123C from a first folding axis to a third folding axis has been performed. Fig. 125A is a front view for describing an example of a bag according to a thirty-third embodiment. Fig. 125B is a partial perspective view for describing a main part of the bag according to the thirty-third embodiment. Fig. 125C is a diagram for describing an example of a state where the bag according to the thirty-third embodiment is hung on a suspension support. Fig. 126A is a front view for describing an example of the bag according to the thirty-third embodiment. Fig. 126B is a side view for describing an example of the bag according to the thirty-third embodiment. Figs. 127A to 127C are partial front views for describing a main part of an example of the bag according to the thirty-third embodiment. Fig. 128A is a front view for describing an example of the bag according to the thirty-third embodiment. Fig. 128B is a plan view for describing an example of the bag according to the thirty-third embodiment. Fig. 129 is a perspective view for describing an example of the bag according to the twenty-first embodiment. Figs. 130A to 130C are diagrams for describing an example of a bag according to a thirty-fifth embodiment. Figs. 131A to 131C are diagrams for describing an example of the bag according to the thirty-fifth embodiment. Figs. 132A to 132C are diagrams for describing an example of the bag according to the thirty-fifth embodiment. Figs. 133A to 133C are perspective views for describing an example of a bag according to a thirty-sixth embodiment. Fig. 134 is a perspective view for describing an example of the bag according to the thirty-sixth embodiment. Fig. 135 is a perspective view for describing an example of the bag according to the thirty-sixth embodiment. Figs. 136A to 136C are perspective views for describing an example of a bag according to a thirty-seventh embodiment. Fig. 137 is a perspective view for describing an example of the bag according to the thirty-seventh embodiment. Figs. 138A to 138C are perspective views for describing an example of the bag according to the thirty-seventh embodiment. Figs. 139A and 139B are diagrams for describing an example of the bag according to the thirty-seventh embodiment. Fig. 140 is a perspective view for describing an example of the bag according to the thirty-seventh embodiment. Figs. 141A and 141B are diagrams for describing an example of a bag according to a thirty-eighth embodiment. Fig. 142 is a perspective view for describing an example of the bag according to the thirty-eighth embodiment. Figs. 143A to 143C are diagrams for describing an example of a bag according to a thirty-ninth embodiment. Fig. 144 is a diagram for describing an example of the bag according to the thirty-ninth embodiment. Figs. 145A to 145C are diagrams for describing an example of the bag according to the thirty-ninth embodiment. Fig. 146 is a perspective view for describing an example of the bag according to the thirty-ninth embodiment. Figs. 147A to 147D are diagrams for describing an example of a bag according to a fortieth embodiment. Fig. 148 is a perspective view for describing an example of a bag according to a forty-first embodiment. Fig. 149A is a partial cross-sectional view for schematically describing a handle portion in a modification of the bag according to the twenty-first embodiment. Fig. 149B is a partial cross-sectional view for schematically describing a handle portion in a modification of the bag according to the twenty-first embodiment. Fig. 149C is a side view for describing an example of the bag according to the twenty-first embodiment. Fig. 150A is a perspective view for describing an example of a bag according to a forty-second embodiment. Fig. 150B is a side view for describing an example of the bag according to the forty-second embodiment. Fig. 150C is a plan view for describing an example of the bag according to the forty-second embodiment. Fig. 151A is a perspective view for describing an example of the bag according to the forty-second embodiment. Fig. 151B is a plan view for describing an example of an opening portion of the bag according to the forty-second embodiment. Fig. 151C is a perspective view for describing an example of the bag according to the forty-second embodiment. Fig. 152A is a perspective view for describing an example of a bag according to a forty-third embodiment. Fig. 152B is a side view for describing an example of the bag according to the forty-third embodiment. Fig. 152C is a plan view for describing an example of the bag according to the forty-third embodiment. Fig. 153A is a perspective view for describing an example of the bag according to the forty-third embodiment. Fig. 153B is a plan view for describing an example of an opening portion of the bag according to the forty-third embodiment. Fig. 153C is a perspective view for describing an example of the bag according to the forty-third embodiment. Fig. 154A is a perspective view for describing an example of the bag according to the forty-second embodiment. Fig. 154C is a perspective view for describing an example of the bag according to the forty-second embodiment. Fig. 155A is a perspective view for describing an example of the bag according to the forty-second embodiment. Fig. 155B is a side view for describing an example near the upper end of a peripheral wall portion of the bag according to the forty-second embodiment. Fig. 155C is a perspective view for describing an example of the bag according to the forty-second embodiment. Fig. 156A is a perspective view for describing an example of a bag according to a forty-fifth embodiment. Fig. 156B is a side view for describing an example of the bag according to the forty-fifth embodiment. Fig. 156C is a plan view for describing an example of the bag according to the forty-fifth embodiment. Fig. 157A is a perspective view for describing an example of the bag according to the forty-fifth embodiment. Fig. 157B is a perspective view for describing an example of the bag according to the forty-fifth embodiment. Fig. 158A is a perspective view for describing an example of the bag according to the forty-fifth embodiment. Fig. 158B is a side view for describing an example of the bag according to the forty-fifth embodiment. Fig. 158C is a plan view for describing an example of the bag according to the forty-fifth embodiment. Fig. 159A is a perspective view for describing an example of the bag according to the forty-fifth embodiment. Fig. 159B is a rear view for describing an example near the upper end of a peripheral wall portion of the bag according to the forty-fifth embodiment. Fig. 160A is a perspective view for describing an example of the bag according to the forty-fifth embodiment. Fig. 160B is a perspective view for describing an example of the bag according to the forty-fifth embodiment. Fig. 161A is a perspective view for describing an example of the bag according to the forty-fifth embodiment. Fig. 161B is a plan view for describing an example of the bag according to the forty-fifth embodiment. Fig. 162A is a perspective view for describing an example of the bag according to the forty-fifth embodiment. Fig. 162B is a plan view for describing an example of an opening portion of the bag according to the forty-fifth embodiment. Fig. 162C is a rear view for describing an example near the upper end of the peripheral wall portion of the bag according to the forty-fifth embodiment. Fig. 163A is a partial perspective view for describing an example of the bag according to the forty-fifth embodiment. Fig. 163B is a partial cross-sectional view illustrating the state of a longitudinal cross section taken along a K1-K1 line in Fig. 163A. Fig. 163C is a partial cross-sectional view for describing an example of the bag according to the forty-fifth embodiment. Fig. 162D is a front view for describing an example near the upper end of the peripheral wall portion of the bag according to the forty-fifth embodiment. Fig. 164A is a perspective view for describing an example of the bag according to the forty-fifth embodiment. Fig. 164B is a partial perspective view for describing an example of the bag according to the forty-fifth embodiment. Fig. 164C is a partial cross-sectional view illustrating the state of the longitudinal cross section taken along the K1-K1 line in Fig. 163A. Figs. 165A, 165B, and 165C are partial cross-sectional views for describing an example of the bag according to the forty-fifth embodiment. Figs. 166A, 166B, 166C, 166D, 166E, and 166F are diagrams for describing an example of a weakened portion of the bag according to the forty-fifth embodiment. Figs. 167A and 167B are perspective views for describing an example of a bag according to a forty-sixth embodiment. Fig. 168 is a perspective view for describing an example of the bag according to the forty-sixth embodiment. Fig. 169A is a perspective view for describing an example of a bag according to a forty-fourth embodiment. Fig. 169B is a side view for describing an example of the bag according to the forty-fourth embodiment. Fig. 170A is a perspective view for describing an example of the bag according to the forty-fourth embodiment. Fig. 171 is a perspective view for describing an example of a bag according to a forty-seventh embodiment. Fig. 172 is a perspective view for describing an example of the bag according to the forty-seventh embodiment. Fig. 173 is a perspective view for describing an example of the bag according to the forty-seventh embodiment. Fig. 174 is a perspective view for describing an example of the bag according to the forty-seventh embodiment. Fig. 175 is a perspective view for describing an example of the bag according to the forty-seventh embodiment. Fig. 176 is a perspective view for describing an example of the bag according to the forty-seventh embodiment. Figs. 177A and 177B are plan views for describing an example of a position restricting member. Figs. 178A to 178D are partial side views for describing an example of the bag according to the forty-third embodiment. Fig. 179A is a perspective view for describing an example of a bag according to a forty-eighth embodiment. Fig. 179B is a side view for describing an example of the bag according to the forty-eighth embodiment. Fig. 179C is a plan view for describing an example of the bag according to the forty-eighth embodiment. Fig. 180A is a perspective view for describing an example of the bag according to the forty-eighth embodiment. Fig. 180B is a perspective view for describing an example of the bag according to the forty-eighth embodiment. Fig. 181A is a perspective view for describing an example of the bag according to the forty-eighth embodiment. Fig. 181B is a side view for describing an example of the bag according to the forty-eighth embodiment. Fig. 181C is a plan view for describing an example of the bag according to the forty-eighth embodiment. Fig. 182A is a perspective view for describing an example of the bag according to the forty-eighth embodiment. Fig. 182B is a side view for describing an example of the bag according to the forty-eighth embodiment. Fig. 182C is a plan view for describing an example of the bag according to the forty-eighth embodiment. Fig. 183A is a perspective view for describing an example of the bag according to the forty-eighth embodiment. Fig. 183B is a side view for describing an example of the bag according to the forty-eighth embodiment. Fig. 183C is a plan view for describing an example of the bag according to the forty-eighth embodiment. Fig. 184A is a perspective view for describing an example of the bag according to the forty-eighth embodiment. Fig. 184B is a side view for describing an example of the bag according to the forty-eighth embodiment. Fig. 184C is a plan view for describing an example of the bag according to the forty-eighth embodiment. Fig. 185A is a perspective view for describing an example of the bag according to the forty-eighth embodiment. Fig. 185B is a side view for describing an example of the bag according to the forty-eighth embodiment. Fig. 185C is a plan view for describing an example of the bag according to the forty-eighth embodiment. Fig. 186 is a perspective view for describing an example of a bag according to a forty-ninth embodiment. Fig. 187 is a perspective view for describing an example of the bag according to the forty-ninth embodiment. Fig. 188 is a perspective view for describing an example of the bag according to the forty-ninth embodiment. Fig. 189 is a perspective view for describing an example of the bag according to the forty-ninth embodiment. Description of Embodiments

[0013] The bag according to the present invention will be described by using, as an example, one applied to a bag used for housing food and drink as contents. However, the use of the bag is not limited to the use for storing food and drink, and the bag can also be applied as a bag capable of housing articles other than food and drink. The type of food and drink to be stored in the bag according to the present invention is not limited, and includes various forms of food and drink, such as a beverage in a state of being stored in a cup such as coffee or a carbonated drink, food stored in a container having a predetermined size and shape such as potatoes, and food wrapped with wrapping paper such as a hamburger.

[0014] Note that, hereinafter, a case where the contents defined as the article to be stored in the bag are a container (cup) storing a beverage or the like, or a container having a predetermined size and shape that stores food or the like, will be described as an example.

[0015] In the present description and the drawings, components having substantially the same features even if the embodiments are different are denoted by the same reference numerals, and detailed descriptions of the components will be omitted.

[0016] The following description presents preferred specific examples of the present invention, and the content of the present invention is not limited to these embodiments and the like. Further, in the following description, directions such as front and back, left and right, up and down, and directions of a horizontal plane are indicated in consideration of convenience of description, but the content of the present invention is not limited to these directions. In the example of Fig. 1, a Z-axis direction is defined as the vertical direction (the upper side is +Z direction, the lower side is -Z direction), directions along an X-axis and a Y-axis, which are orthogonal to each other and defined on a plane with the Z-axis direction as a normal line, are defined as an X-axis direction and a Y-axis direction, and an XY plane, which is a plane formed by the X-axis and the Y-axis, is defined as the horizontal plane, and the description will be made based on these. The same applies to the other drawings besides Fig. 1 (Figs. 2 to 82) with respect to the X axis, the Y axis, and the Z axis. In addition, relative size ratios such as the sizes illustrated in each of Figs. 1 to 82 are described for convenience, and do not limit the actual size ratios.[1 First Embodiment][1-1 Configuration]

[0017] A bag 10 according to the first embodiment has a main body 20. The main body 20 has a space portion 23 and an opening portion 24. The space portion 23 is formed so as to be capable of housing a container (a container 200 in Figs. 2 and 3, and the like) as contents. The opening portion 24 is formed so that the container 200 (contents) can be inserted into a housing space (the space portion 23).(Main body)

[0018] The main body 20 includes a peripheral wall portion 21 and a bottom portion 22. The peripheral wall portion 21 is a wall portion connected to the bottom portion 22 at a peripheral edge of the bottom portion 22. In the main body 20, a housing space is formed as a space surrounded by the peripheral wall portion 21 connected to the bottom portion 22 at the peripheral edge of the bottom portion 22. Note that, hereinafter, the housing space is referred to as the space portion 23.(Material of main body)

[0019] The material of the main body 20 is not particularly limited, and examples thereof include a paper-based material, a woven fabric, a nonwoven fabric, a resin, and a metal. The nonwoven fabric that can be adopted as the material of the main body 20 is not particularly limited. The nonwoven fabric refers to a material defined as a nonwoven fabric in JIS L0222: "A material in which fibers are oriented in one direction or randomly, and the fibers are bonded together by entanglement, and / or fusion, and / or adhesion. However, paper, woven fabric, knitted fabric, tuft, and fulled felt are excluded." Examples of the nonwoven fabric include a spunbonded nonwoven fabric, a chemically bonded nonwoven fabric, an air-laid nonwoven fabric, a needle punched nonwoven fabric, a spun lace nonwoven fabric, a thermally bonded nonwoven fabric, a resin-bonded nonwoven fabric, a nanofiber nonwoven fabric and the like, and also include a melt-blown nonwoven fabric. As the nonwoven fabric, a nonwoven fabric containing pulp fibers as a main component of the fibers is suitable, but the nonwoven fabric is not limited thereto, and a nonwoven fabric made of fibers mainly containing non-pulp fibers such as synthetic fibers may be used. A nonwoven fabric sheet "containing pulp fibers as the main component of the fibers" refers to a nonwoven fabric sheet containing pulp fibers in an amount of 50% by mass or more, preferably 70% by mass or more, and more preferably 80% by mass or more. Examples of the non-pulp fibers include natural fibers such as wool, silkworm yarn, and cotton, synthetic fibers such as nylon, vinylon, and polyesters such as polyethylene terephthalate, polyacrylic, polyolefins such as polyethylene and polypropylene, and polyurethane, regenerated fibers such as rayon, semisynthetic fibers such as acetate, and the like, among these, synthetic fibers are suitably used. The resin that can be adopted as the material of the main body 20 is not particularly limited, and a polyolefin-based resin such as polyethylene or a resin of polyethylene terephthalate may be appropriately adopted. Preferred resins selected from the various resins described above include biodegradable resins having fewer environmental pollution problems. Examples of the biodegradable resin include microbially produced biodegradable resins such as polyhydroxyalkanoate (PHA) and PHA-based copolymers; natural product-based biodegradable resins such as cellulose derivatives such as cellulose acetate and starch-based resins mainly composed of starch such as corn starch; chemically synthesized biodegradable resins such as lactic acid-based resins such as polylactic acid (PLA), polylactic acid / polycaprolactone copolymers, and polylactic acid / polyether copolymers, succinate-based resins such as polybutylene succinate (PBS), polybutylene succinate adipate (PBSA), and polyethylene terephthalate succinate (PETS), polycaprolactone and polyvinyl alcohol (PVA); and other such as polyglycolic acid (PGA), polybutylene adipate / terephthalate, and biodegradable polyolefins (trade name: Biorecover, trade name: Cra Drop, etc.).

[0020] The material of the main body 20 is not particularly limited, but is preferably formed of a paper-based material having fibers from a viewpoint of moisture absorbency and environmental impact reduction. In the examples of Figs. 1A to 1C and the like, the main body 20 is formed of a paper-based material. Examples of the paper-based material include so-called papers produced by sticking plant fibers and other fibers, as well as chemical fiber paper, synthetic paper, waterproof paper, coated paper, substitute paper, parchment paper, wool paper, glass fiber paper, stone paper, and ceramic paper, and the like. The paper-based material may be recycled paper or non-recycled paper. Note that the main body 20 is not prohibited from using a non-paper-based material in combination as long as the main body has a paper-based material. Examples of the non-paper-based material include a cloth-based material (a woven fabric material or a nonwoven fabric material), a resin, a metal, and the like. Examples of the nonwoven fabric material include a so-called air-laid sheet formed in a sheet shape by bonding crushed pulp accumulated by an air flow, a pulp-based material, and a nonwoven fabric of fibers such as natural fiber materials and synthetic fibers. As the material of the main body 20, a combination of a paper-based material and a non-paper-based material can also be used. Examples of the resin material that can be used as the non-paper-based material include resins composed of resin materials such as synthetic resins and natural resins. As an example of a case of combining a paper-based material and a resin material, a case where the main body 20 has a structure in which a resin sheet is laminated on at least one surface of the paper-based material can be exemplified. In a case where metal is used as the non-paper-based material, a metal sheet or a metal net (metal net-like structural member) can be exemplified. Examples of the metal sheet include an aluminum foil and the like. As an example of a case of combining a paper-based material and a metal, a case where the main body 20 has a structure in which a metal sheet or a metal net is laminated on at least one surface of the paper-based material can be exemplified. In a case where a non-paper-based material such as a resin material or a metal material is combined with a paper-based material as in these examples, the non-paper-based material may be laminated on only one surface of the paper-based material, or may be laminated on both one surface and the other surface of the paper-based material. However, as described above, from the viewpoint of environmental impact reduction, it is preferable that the resin sheet is omitted, that is, the material of the main body 20 is composed of only a paper-based material.

[0021] In a case where the main body 20 is made of a sheet having a paper-based material, the sheet having a paper-based material that forms the main body 20 preferably has waterproofness. Such a sheet can be obtained, for example, in a process of manufacturing a sheet having a paper-based material, (for example, specifically, in a case of performing a step of papermaking raw material fibers (pulp fibers or the like)), by adding various additives such as a lubrication strength enhancer, a sizing agent (for example, alkyl ketene dimer (AKD), etc.), and cationized starch to the raw material fibers of the sheet in a predetermined amount. As the additive, calcium carbonate or the like may be adopted in addition to a lubrication strength enhancer, a sizing agent, and the like. In this case, various additives such as a lubrication strength enhancer, a sizing agent, cationized starch, and calcium carbonate may be added to the raw material fibers of the sheet. At this time, the amount of these additives is set to such an amount that the waterproofness can be enhanced. As a result, a sheet with enhanced waterproofness can be obtained as the sheet having a paper-based material. The additives shown above are merely examples, and other additives may be further added in addition to these additives, or these additives may be replaced with other substances having functions equivalent to the functions of the additives shown above.

[0022] In a case where the main body 20 is composed of a sheet having a paper-based material, the main body 20 may be formed by forming a layer for enhancing the waterproofness on the surface of the sheet made of a paper-based material by a coating method or the like.

[0023] Further, paper may be used as the main body 20. The paper that can be used to form the main body 20 is not limited, and may be a paper-based material using bleached pulp fibers, but may be a paper-based material using unbleached pulp fibers. For example, kraft paper may be used as the material of the main body 20, for example.

[0024] Examples of the paper-based material constituting the bag according to the present invention include so-called paper obtained by drawing a slurry of fibrous raw materials on a net, drying, pressure drying, and papermaking to form in a sheet shape, so-called air-laid sheets obtained by accumulating opened fibrous raw materials such as crushed pulp obtained by crushing a raw material sheet composed of pulp-based fibers and the like with a crusher, by an air flow, and fixing fibers of the fibrous accumulated body to each other with a binder, those obtained by laminating a plurality of these and the like. The paper-based material may contain fibers such as non-pulp-based natural fibers, synthetic fibers, and regenerated fibers in addition to those composed only of pulp. However, the paper-based material preferably contains pulp in an amount of 50% by mass or more, more preferably 70% by mass or more, further preferably 80% by mass or more, and particularly preferably 100% by mass of pulp. As the paper-based material, a composite material with materials such as a film of a synthetic resin or a natural resin, a nonwoven fabric, a wood-based material such as a wood foil, or even an aluminum foil can also be used. In a case where a composite material is used, the composite material preferably contains 50% by mass or more of pulp as a whole, and particularly preferably contains 80% by mass or more of pulp. The higher the content of pulp, the more easily the paper-based material is biodegraded, which is preferable.

[0025] Here, examples of the pulp include wood pulp, non-wood pulp, synthetic pulp, and waste paper pulp. More specific examples thereof include mechanical pulp (MP) such as ground pulp (GP), stone ground pulp (SGP), refiner ground pulp (RGP), pressurized ground pulp (PGW), thermomechanical pulp (TMP), chemi-thermomechanical pulp (CTMP), and bleached chemi-thermomechanical pulp (BCTMP), chemical mechanical pulp (CGP), semi-chemical pulp (SCP), kraft pulp (KP) such as hardwood bleached kraft pulp (LBKP) and softwood bleached kraft pulp (NBKP), chemical pulp (CP) such as soda pulp (AP), sulfite pulp (SP), and dissolving pulp (DP), synthetic pulp using nylon, rayon, polyester, polyvinyl alcohol (PVA), and the like as the raw material, tailings pulp (TP), rag pulp using cotton, flax, hemp, jute, Manila hemp, ramie and the like as the raw material, stem pulp such as straw pulp, esparto pulp, bagasse pulp, bamboo pulp, and kenaf pulp, and auxiliary pulp such as bast pulp, and the like, and one kind or several kinds thereof can be appropriately selected and used. Examples of the pulp that can be used include softwood pulps such as red pine, Abies sachalinensis, Picea jezoensis, Douglas fir, hemlock, and spruce; hardwood pulps such as beech, oak, birch, eucalyptus, poplar, and alder; wood pulps such as a mixture of softwood pulp and hardwood pulp; non-wood pulps such as kenaf bagasse pulp, bamboo pulp, cereal pulp, straw pulp, abaca pulp, and cotton pulp; waste paper pulp and the like. Softwood pulp has a longer fiber length than hardwood pulp, and thus a degree of entanglement between fibers is increased in a paper material using pulp having a long fiber length, such as softwood pulp, and crushed pulp obtained by crushing a raw material sheet using softwood pulp or the like also has a longer fiber length than crushed pulp obtained by crushing a raw material sheet made of hardwood pulp, and thus the strength of the paper-based material is improved by entanglement between fibers.

[0026] Further, as the paper material, a paper material having a resin coating layer on at least one surface may be used. In a case where a paper material having a coating layer is used, it is preferable to use the paper material so that the coating layer is positioned at least on the inner surface side of the container. The coating layer can be formed of a resin film or a coating agent layer. In a case where the coating layer is formed by attaching a resin film, the film may be a single layer film or a multilayer film, or the coating layer may be formed by stacking and attaching a single layer or a multilayer film. Further, not only one type of coating agent is applied, but also two or more types of coating agents may be overcoated to form a coating layer.

[0027] Examples of the resin for forming the coating layer include polystyrene, polyethylene, polypropylene, polyethylene terephthalate, polyurethane, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, cyanoacrylate, epoxy resins, polyacrylic acid resins, polymethacrylic acid resins, nylon, and polycarbonate; naturally degradable resins and mixtures of naturally degradable resins such as polycaprolactone, polyhydroxyalkanoate, polyhydroxybutyrate, polylactic acid, starch-based resins such as esterified starch, cellulose acetate, polyethylene succinate, polyvinyl alcohol, polyglycolic acid, chitosan / cellulose / starch, poly(hydroxybutyrate / hydroxyhexanoate), poly(caprolactone / butylene succinate), polybutylene succinate, poly(butylene succinate / adipate), poly(butylene succinate / carbonate), poly(ethylene terephthalate / succinate), poly(butylene adipate / terephthalate), and poly(tetramethylene adipate / terephthalate); naturally degradable biomass resins and mixtures of naturally degradable biomass resins; fluororesins, silicone resins, ultraviolet curable resins, copolymers of monomers constituting the above resins, such as an ethylene-vinyl acetate copolymer, an ethylene-vinyl alcohol copolymer, an ethylene-propylene copolymer, an ethylene-propylene-butadiene copolymer, an acryl-styrene copolymer, a styrene-butadiene copolymer, or an acrylonitrile-butadiene-styrene copolymer, natural resins, paraffin, gelatin, cellophane, polymethylpentene and the like. The coating layer is preferably formed of naturally degradable resins such as naturally degradable resins, naturally degradable biomass resins, and natural resins or combinations thereof.

[0028] Examples of the naturally degradable resin include natural resins, naturally degradable plastics, and biomass plastics. Examples of the naturally degradable plastic and the biomass plastic include naturally degradable resins and mixtures of naturally degradable resins such as polycaprolactone, polyhydroxyalkanoate, polyhydroxybutyrate, polylactic acid, starch-based resins such as esterified starch, cellulose acetate, polyethylene succinate, polyvinyl alcohol, polyglycolic acid, chitosan / cellulose / starch, poly(hydroxybutyrate / hydroxyhexanoate), poly(caprolactone / butylene succinate), polybutylene succinate, poly(butylene succinate / adipate), poly(butylene succinate / carbonate), poly(ethylene terephthalate / succinate), poly(butylene adipate / terephthalate), and poly(tetramethylene adipate / terephthalate).

[0029] Further, the naturally degradable resins may contain additives listed in the Positive List of the Japan BioPlastics Association, such as, lubricants such as stearic acid amide, fatty acid ester, fatty acid metal salt, fatty acid, fat and oil, and glycerin fatty acid ester; stabilizers such as triphenyl phosphate, phthalic anhydride, tris dibutyl phosphate, and acetic anhydride; inorganic materials such as titanium dioxide, kaolin, mica, bentonite, diatomaceous earth, magnesium oxide, quartz sand aluminum, calcium carbonate, calcium hydroxide, and seashell powder; surfactants such as higher fatty acid amides, nonionic surfactants, and glycerin fatty acid esters; foaming agents such as citric acid, sodium bicarbonate, and butane; and other materials such as antistatic agents and hot melt adhesives.

[0030] Further, the term "naturally degradable" refers to a property of being decomposed by microorganisms, ultraviolet rays, changes in climate, or the like in any of air, soil, and water, thereby reducing environmental impact.

[0031] In a case where the main body 20 is formed of a resin material, examples of the resin material to be used include polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polycarbonate (PC), and the like), polyolefin (polyethylene (PE), polypropylene (PP), and the like), polyamide (nylon-6, nylon-66, and the like), polyacrylonitrile (PAN), polyimide (PI), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polymethyl methacrylate (PMMA), polyether sulfone (PES), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), an ethylene-propylene copolymer (EP), a cast polypropylene (CPP), a biaxially oriented nylon (ON), an ethylene-olefin copolymer, an ethylene-acrylic acid copolymer (EAA), an ethylene-methacrylic acid copolymer (EMAA), an ethylene-vinyl acetate copolymer (EVA), and the like.

[0032] The resin material constituting the bag 10 is preferably one comprised of one or more types of materials selected from olefin-based resins, biomass-based resins, and biodegradable resins.

[0033] As a non-oriented olefin resin, for example, a propylene-based resin is used. Examples of the propylene-based resin include a propylene homopolymer, a propylene-α-olefin random copolymer, and a propylene-α-olefin block copolymer. Examples of the polyethylene-based resin include polyethylene resins such as linear low density polyethylene (LLDPE), linear medium density polyethylene (LMDPE), linear high density polyethylene (LHDPE), low density polyethylene (LDPE), medium density polyethylene (MDPE), and high density polyethylene (HDPE), and ethylene-based copolymers such as an ethylene-butene-rubber copolymer (EBR), an ethylene-propylene-rubber copolymer (EPR), an ethylene-vinyl acetate copolymer (EVA), an ethylene-methyl methacrylate copolymer (EMMA), an ethylene-ethyl acrylate copolymer (EEA), an ethylene-methyl acrylate (EMA) copolymer, an ethylene-ethyl acrylate-maleic anhydride copolymer (E-EA-MAH), an ethylene-acrylic acid copolymer (EAA), and an ethylene-methacrylic acid copolymer (EMAA); and furthermore, an ionomer of an ethylene-acrylic acid copolymer, an ionomer of an ethylene-methacrylic acid copolymer, and the like. These can be used solely or in combination of two or more kinds thereof.

[0034] Examples of the biomass-based resin include plant-derived biomass polyethylene. The plant-derived biomass polyethylene is, for example, a polyethylene-based resin produced from plant-derived ethylene using sugar cane, corn, beet, or the like as a starting material. Examples of the biomass polyethylene include linear low-density polyethylene (LLDPE), linear medium-density polyethylene (LMDPE), linear high-density polyethylene (LHDPE), low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE) and the like. These can be used solely or in combination of a plurality of kinds thereof. In addition to these, biomass polypropylene or biomass polyethylene obtained from tall oil obtained as a by-product when pulp is produced or waste edible oil as a raw material can be used.

[0035] Examples of the biodegradable resin include resins such as polyethylene succinate (PES), polybutylene succinate (PBS), polylactic acid (PLA), polyglycolic acid (PGA), polyhydroxybutyrate (PHB), polycaprolactone (PCL), a mixture or copolymer of polycaprolactone and polybutylene succinate (PCL / PBS), a copolymer of polyhydroxybutyrate and polyhydroxyvalerate (PHB / PHV), a mixture or copolymer of polybutylene succinate and polybutylene adipate (PBS / PBA), a copolymer of polyethylene terephthalate and polyethylene succinate (PET / PES), and a copolymer of polybutylene terephthalate and polybutylene adipate (PBT / PBA). These resin materials may be used solely, or a plurality of kinds thereof may be arbitrarily selected and mixed and used.(Peripheral wall portion)

[0036] The peripheral wall portion 21 rises from the peripheral edge of the bottom portion 22. Further, the peripheral wall portion 21 is connected to the bottom portion 22 at the peripheral edge of the bottom portion 22. In the examples of Fig. 1 and the like, the peripheral wall portion 21 is continuously formed from the peripheral edge of the bottom portion 22. The peripheral wall portion 21 is formed in a cylindrical shape, and a space surrounded by the bottom portion 22 and the peripheral wall portion 21 to be described later forms the space portion 23. The phrase "peripheral wall portion connected to the bottom portion at the peripheral edge of the bottom portion" indicates that the peripheral wall portion 21 is continuous at the peripheral edge of the bottom portion 22 in the state of the bag 10. The case where the peripheral wall portion 21 is continuous at the peripheral edge of the bottom portion 22 includes both a case where the bottom portion 22 and the peripheral wall portion 21 are formed by folding a single blank material (a case where the peripheral wall portion 21 is continuously formed at the peripheral edge of the bottom portion 22) and a case where the bottom portion 22 and the peripheral wall portion 21 are formed by connecting different blank materials. In other words, the phrase "peripheral wall portion continuous at the peripheral edge of the bottom portion" indicates that the bottom portion 22 and the peripheral wall portion 21 form a connected structure.

[0037] In the example of Fig. 1, the peripheral wall portion 21 has a pair of wall surface portions 25 (main wall surface portions) facing each other and a pair of side wall surface portions 26 facing each other. In the peripheral wall portion 21, the respective wall surface portions 25 and 25 are connected to the side wall surface portions 26 and 26 at side end edges of the wall surface portion 25.(Bottom portion)

[0038] The bottom portion 22 forms a bottom surface of the main body 20. The configuration of the bottom portion 22 is not particularly limited as long as it has a structure capable of preventing the contents stored in the space portion 23 from falling downward. In the example of Fig. 1, as also illustrated in Figs. 5A to 5C, the bottom portion 22 is configured as a portion having a folding structure 27 in which a portion of a blank material 500 corresponding to the bottom portion 22 (a bottom portion corresponding portion 501) is folded. Note that Fig. 5A is a diagram for describing folding of the blank material 500 in the case where the folding structure 27 is formed. Further, the examples of Figs. 5B and 5C are merely examples of the bottom portion 22, and do not limit the structure of the bottom portion 22. The bottom portion 22 may be formed in a planar shape, may have a fine uneven structure (an embossed structure or the like), or may have a structure with a gusset portion (a gusset).(Corner portion)

[0039] The main body may have at least one corner portion 28. The corner portion 28 is formed on the inner surface 21A of the peripheral wall portion 21. In the examples of Fig. 1 and the like, the corner portion 28 is formed to extend from the bottom portion 22 toward the opening portion. The corner portion 28 is formed at a boundary position between the wall surface portion 25 and the side wall surface portion 26.(Main body gusset portion)

[0040] In the main body 20, in a case where the pair of wall surface portions 25 are defined as a first wall surface portion 25A and a second wall surface portion 25B, it is preferable that a main body gusset portion 29 that changes a separation distance between the first wall surface portion 25A and the second wall surface portion 25B is formed in the pair of side wall surface portions 26. In this case, when the bag 10 is not used, the shape of the main body gusset portion 29 can be a shape in which the separation distance between the first wall surface portion 25A and the second wall surface portion 25B is small (referred to as a contracted state). Then, when the bag 10 is used, the shape of the main body gusset portion 29 can be a shape in which the separation distance between the first wall surface portion 25A and the second wall surface portion 25B is large (referred to as a widened state). As described above, since the bag 10 can be brought into a widened state and a contracted state as necessary, the bag can be stored even in a narrow place when not in use, and the space portion 23 for storing the contents can be secured when in use.(Position restricting member)

[0041] The main body 20 is provided with a position restricting member 30. One position restricting member 30 may be provided, or a plurality of position restricting members 30 may be provided as illustrated in Fig. 6A. In the example of Fig. 6A, two position restricting members 30 are provided, and each can independently change the state of a restriction wall portion 31 between a first shape state ST1 and a second shape state ST2 (movement of a movable portion of the restriction wall portion 31 in the direction of an arrow T). In Fig. 6, for convenience of description, description of a thickness of each member and description of the main body gusset portion 29 are omitted. The same applies to Figs. 4 and 7.

[0042] The position restricting member 30 is bonded to at least the inner surface of the peripheral wall portion 21. In the examples of Figs. 1 and 2, and the like, a bonding margin portion 32 bonded to the peripheral wall portion 21 at the side end of the restriction wall portion 31 to be described later is formed, and the position restricting member is bonded to the inner surface of the peripheral wall portion 21 at the bonding margin portion 32. The example of Figs. 1 and 2 is merely an example, and formation of the bonding margin portion 32 may be omitted. For example, as also shown in Fig. 11B and the like, the position restricting member 30 may be formed in a shape in which an intervening wall 50 to be described later in a second embodiment and the restriction wall portion 31 are annularly connected, and may be bonded to the inner surface of the peripheral wall portion 21 via the intervening wall 50. Further, in a case where the peripheral wall portion 21 has the wall surface portion 25 and the side wall surface portion 26 as illustrated in Figs. 1 and 2, and the like, the position restricting member 30 is preferably bonded to the wall surface portion 25 and the side wall surface portion 26. In this case, in a case where the corner portion 28 is formed at the boundary position between the wall surface portion 25 and the side wall surface portion 26, the position restricting member 30 is configured to cover at least a part of the corner portion 28 in a case where the restriction wall portion 31 is in the second shape state ST2, so that after deforming the state of the restriction wall portion 31 of the position restricting member 30 from the second shape state ST2 to the first shape state ST1 as illustrated in Fig. 2A, it can be made difficult to return it from the first shape state ST1 to the second shape state ST2. Like the bonding margin portion 32, a portion of the restriction wall portion 31 to be bonded to another member or portion is referred to as a fixed portion, and a portion of the restriction wall portion 31 excluding the fixed portion is referred to as a movable portion. The movable portion can move between a position (first position) close to the fixed portion and a position (second position) separated from the fixed portion by a predetermined distance. As the movable portion moves to a position (the second position) farther away from the fixed portion, the first shape state is more likely to be formed, and a small space portion 33 to be described later can be formed in such a size that a container (a paper cup, a potato container, or the like) can be placed.(Restriction wall portion)

[0043] The position restricting member 30 has a restriction wall portion 31. The restriction wall portion 31 restricts the movement of the contents in the interior of the space portion 23 (more preferably, the movement of the contents in the horizontal direction within the small space portion 33).

[0044] In the position restricting member 30, the restriction wall portion 31 is configured to be capable of forming at least a first shape state ST1 in which a facing surface 34 forms a concave surface and a second shape state ST2 different from the first shape state. Note that, the facing surface 34 is defined as follows. That is, in a case where the contents (a container 200 in Figs. 2B and 3B, and the like) are placed in the space portion 23 so that the movement thereof is restricted by the restriction wall portion 31, a surface that faces the contents among the surfaces of the restriction wall portion 31 is referred to as the facing surface 34. The case where the contents are placed in the space portion so that the movement is restricted by the restriction wall portion indicates that horizontal movement of the contents placed in the space portion is restricted in a case where the bag 10 is placed with a bottom surface portion facing downward and the opening portion facing upward. Note that, the state where the movement is restricted by the restriction wall portion is realized by the restriction wall portion forming the second shape state ST2 when the contents are placed in the space portion.

[0045] The size of the restriction wall portion may be determined according to the size of the contents. For example, in the case where the contents are the container 200 having a container main body into which a beverage is poured, the size of the restriction wall portion may be determined according to an outer diameter and outer shape of a container main body 210.

[0046] Further, the restriction wall portion 31 is preferably formed up to the vicinity of the upper end side of the container main body. By forming it in this manner, for example, in a case where the container filled with the beverage is held in the small space portion 33, it becomes easier to create a state where most of the outer peripheral surface of the container is in contact with the restriction wall portion 31. Therefore, the restriction wall portion 31 can also function as a sleeve, making it easier to achieve a heat insulating effect, improving a heat retaining property of the container or a cool keeping property of the container, and making it possible to maintain the temperature of the beverage in the container at a favorable temperature for a long time. Note that, in a case where the container 200 is placed in the small space portion 33, in the example illustrated in Fig. 3B, the container 200 is configured so that the container main body 210 directly faces the restriction wall portion 31. This is merely an example, and as illustrated in Fig. 52A, a sleeve 41 may be fitted onto the outer peripheral surface of the container main body 210 of the container 200, and when the container 200 is stored in the bag 10, the container 200 provided with the sleeve 41 may be placed in the small space portion 33 as illustrated in Fig. 52B. By storing the container 200 in this manner, the heat retaining property of the container or the cool keeping property of the container is further improved, and it becomes possible to maintain the temperature of the beverage in the container at a favorable temperature for a longer time. Note that, although the sleeve 41 illustrated in Fig. 52A is formed in a cylindrical shape corresponding to the shape of the outer peripheral surface of the container main body 210, this is merely an example, and the sleeve 41 is not limited to this shape.(Positional relationship between corner portion and restriction wall portion)

[0047] Further, as illustrated in the example of Fig. 1A, in a case where the main body 20 has the corner portion 28, it is preferable that the position restricting member 30 covers at least a part of at least one of the corner portions 28 when the restriction wall portion 31 is in the second shape state ST2. In this case, the small space portion 33 can be formed at a position including the corner portion of the main body. Further, in this case, the small space portion 33 formed in a state of being surrounded by the fixed portion and the movable portion when the movable portion operates from the first position to the second position can be largely secured, making it possible to create a state where relatively large contents can be easily held.(First shape state and second shape state)

[0048] Regarding the state of the restriction wall portion 31, the first shape state ST1 is not particularly limited as long as the facing surface 34 forms a concave surface, but in the example of Fig. 2A, the concave surface is a V-shaped (V-shaped in cross section) surface. The example of Fig. 2A is merely an example, and the concave surface may be a U-shaped surface. In the first shape state ST1, a state where the facing surface 34 forms a concave surface includes a case where a part of the facing surface 34 is a concave surface in addition to a case where an entire region of the facing surface 34 is a concave surface. However, from a viewpoint of securing the small space portion 33 with a sufficient size, it is preferable that the first shape state ST1 be a case where substantially the entire region of the facing surface 34 (the region of the facing surface 34 of the portion corresponding to the movable portion described above) is a concave surface. Note that, whether or not the facing surface 34 is in a state of forming a concave surface can be determined by selecting two different points of the facing surface 34, using a straight line passing through the two points as a reference (reference straight line), and specifying whether or not the facing surface 34 exists in a portion on a side farther from the peripheral wall portion 21 than the reference straight line in a plan view of the bag 10. In a case where there is at least one reference straight line in which the facing surface 34 exists in a portion on the side farther from the peripheral wall portion 21 than the reference straight line, it can be determined that "the portion located on the side away from the peripheral wall portion 21" of the facing surface 34 forms a concave surface.

[0049] Regarding the state of the restriction wall portion 31, the second shape state ST2 is not particularly limited as long as it is a state different from the first shape state ST1. For example, the second shape state ST2 can exemplify a state where the facing surface 34 forms a convex surface. Examples of the state where the facing surface 34 forms a convex surface include a state where the convex surface is a mountain-shaped (mountain-shaped in cross section) surface as illustrated in the examples of Fig. 1A, and the like. Note that the example of Fig. 1A is merely an example, and the convex surface may be a surface like the outer surface of a column, a spherical surface, or the like. Note that, the second shape state ST2 is preferably a state where a convex surface is formed on the facing surface such that the restriction wall portion 31 extends along the inner surface 21A of the peripheral wall portion 21. In a case where the restriction wall portion 31 is disposed so as to cover the corner portion 28, the second shape state ST2 can be defined as a state where the shape of the facing surface 34 of the restriction wall portion 31 is a convex shape corresponding to the shape on the inner surface side of the corner portion 28. Further, the concept of a case where the second shape state ST2 is a state different from the first shape state ST1 includes a state where the facing surface 34 is a flat surface.(Material of position restricting member)

[0050] The material of the position restricting member 30 is not particularly limited. The material of the position restricting member may be a paper-based material, a woven fabric, a nonwoven fabric, a resin, or a metal. As various materials such as a paper-based material, a woven fabric, a nonwoven fabric, a resin, and a metal that can be adopted as a material of the position restricting member 30, the above-described various materials may be applied as materials that can be adopted to form the main body 20. From a viewpoint of ease of handling and the like and the viewpoint of environmental impact reduction, the position restricting member 30 is preferably a paper-based material. Further, from a viewpoint of suppressing the possibility of a decrease in strength of the position restricting member 30 when the position restricting member 30 absorbs liquid, the position restricting member 30 preferably has waterproofness. Therefore, it is more preferable that the position restricting member 30 is a paper-based material and has waterproofness. In a case where the contents stored in the bag 10 is a container storing a liquid, the strength of the position restricting member 30 is less likely to decrease even if the liquid stored in the container adheres to the position restricting member 30.

[0051] The position restricting member 30 preferably has water absorbency. It is preferable that the position restricting member 30 can suppress moisture from leaking to the outside by water absorbency (that is, has waterproofness). From such a viewpoint, the position restricting member 30 preferably includes a paper-based material.(Positional relationship between contents and position restricting member)

[0052] When the bag 10 is not used, the position restricting member 30 provided on the inner surface side of the main body 20 of the bag 10 may have the restriction wall portion 31 in the second shape state ST2. When the bag 10 is used, the restriction wall portion 31 is changed from the second shape state ST2 to the first shape state ST1, for example, while a user touches the restriction wall portion 31. Then, the contents are inserted into the space portion 23 of the bag 10 so that the contents face the facing surface 34. For example, in a case where the contents are a container storing a liquid, the container is inserted from the opening portion of the bag 10 downward into the space portion 23 so that the outer peripheral surface of the container main body faces the facing surface 34.(Small space portion)

[0053] Note that, in the present description, in the space portion 23 of the bag, "a space portion surrounded by the main body and the position restricting member" and "a space portion into which the container is intended to be inserted such that the container faces the facing surface with the restriction wall portion in a first shape state" are referred to as the small space portion 33. Then, the portion forming the small space portion 33 (the portion of the restriction wall portion 31 or the peripheral wall portion 21) can function as a holding portion for holding the contents by restricting the movement of the contents such as a container. As described above, according to the present invention, it is possible to cause the portion of the peripheral wall portion 21 to exhibit the function of restricting the movement of the contents.

[0054] As described above, in a case where a container to be the contents is placed in the space portion 23, it is preferable that a gap exists between at least a part of the upper end portion of the restriction wall portion 31 and the outer peripheral surface of the container. Since the gap exists between at least a part of the upper end portion of the restriction wall portion 31 and the outer peripheral surface of the container, even if liquid or the like spills from the container, the spilled liquid can collide with the restriction wall portion 31, making it less likely for the liquid to spill out to the outside of the restriction wall portion 31. Therefore, in a case where an article other than the container is stored in the bag, it is possible to suppress occurrence of a state where a liquid falls onto the upper surface side of the article other than the container.(Surface state of position restricting member)

[0055] The position restricting member 30 may be in a smooth state where the surface is not uneven, or may have an uneven surface subjected to embossing. Since the position restricting member 30 has an uneven surface, a higher heat insulating effect can be easily achieved.(Blank material)

[0056] In the bag illustrated in the example of Fig. 1A, the main body 20 is formed of a single blank material 500 as illustrated in Figs. 4 and 5. Figs. 4 and 5 are diagrams for describing the manufacturing process of the bag 10. As illustrated in Fig. 4A, the blank material 500 may be determined according to the shape of the main body 20 and a manufacturing method. For example, in a case where the main body 20 is a sheet having a paper-based material and having waterproofness, as a sheet for forming the blank material 500, a sheet obtained by papermaking raw material fibers containing a paper-based material (or made of a paper-based material) with various additives described above (a wet strength enhancer, AKD, calcium carbonate, cationized starch, and the like added in predetermined amounts may be used. Note that, for the additives described above, all types of additives may be added to the raw material fibers, or some types of additives may be added to the raw material fibers, depending on the application and function. In the example illustrated in Fig. 4, the blank material 500 is formed of a rectangular sheet. When the bag 10 is manufactured, the position restricting member 30 is disposed at a predetermined position on the blank material 500 as illustrated in Fig. 4B. As illustrated in Fig. 4C, the rectangular blank material 500 is folded in the direction of an arrow F1 at a position corresponding to the corner portion 28 (a position PU in Fig. 4), and an adhesive margin corresponding portion 550 of the side end portion of the blank material 500 is adhered. Note that, in the following description, the side end portion of the blank material 500 may be referred to as a side end edge portion. Further, in the following description, an adhesive portion formed by adhesion of the adhesive margin corresponding portion 550 is referred to as a blank material adhesive portion 551. At this time, a cylindrical structure 530 is formed. In the blank material 500, a peripheral wall portion corresponding portion 502, which is a portion corresponding to the peripheral wall portion 21, and a bottom portion corresponding portion 501, which is a portion corresponding to the bottom portion 22, are defined in advance, and as illustrated in Fig. 5A, the bottom portion corresponding portion 501, which is a portion corresponding to the bottom portion 22 of the cylindrical structure 530, is folded inward. In the example of Fig. 5A, a portion 501A of the bottom portion corresponding portion 501 is folded in an inward direction (toward the center of the cylindrical structure (the direction of an arrow F2)). Furthermore, a portion 501B is folded in the inward direction (toward the center of the cylindrical structure (the direction of the arrow F2)). At this time, a portion where the portion 501A and the portion 501B overlap each other and a portion where the two portions 501B overlap each other are adhered with an adhesive or the like. In this case, the folding structure 27 is formed at the bottom portion 22. Further, a reinforcing sheet material or the like may be further attached to the bottom portion 22. Note that, the portion 501A is a portion extending below a portion of the bottom portion corresponding portion 501 corresponding to the side wall surface portion 26. The portion 501B is a portion extending below a portion of the bottom portion corresponding portion 501 corresponding to the wall surface portion 25.

[0057] Note that, when a portion where the portion 501A and the portion 501B, which are portions forming the bottom portion 22, overlap each other or a portion (overlapping portion) where the two portions 501B overlap each other is adhered with an adhesive or the like, it is preferable that a predetermined portion including at least a part of the overlapping portion is subjected to heat treatment. During this heat treatment, a portion where the portion 501A and the portion 501B overlap each other or a portion where the two portions 501B overlap each other may form a predetermined structure such as an adhesive structure with an adhesive interposed therebetween or an adhesive structure without an adhesive interposed therebetween. Note that, when heat treatment is applied to the bottom portion 22, it is preferable that pressure treatment is applied to the bottom portion 22. Further, in the example described above, the heat treatment is performed when the main body 20 is formed (when the bottom portion 22 is formed), but a timing of the heat treatment is not limited thereto. The heat treatment may be performed after the main body 20 is formed, or may be performed before the main body 20 is formed. However, in a case where the heat treatment is performed before the main body 20 is formed, it is preferable that the main body 20 is formed before the adhesive softened by the heat treatment hardens. Note that, application of heat treatment may also be applied to the case of manufacturing the bag according to all the embodiments after the second embodiment.[1-2 Actions and Effects]

[0058] According to the bag 10 according to the first embodiment, it is possible to omit the operation of disposing the cup holder for stabilizing the position of the container in addition to the bag 10, and to easily and stably hold the container with a simple operation.

[0059] Further, in a case where the bag 10 is configured so that the position restricting member 30 covers at least a part of at least one of the corner portions 28 when the restriction wall portion 31 is in the second shape state ST2, the small space portion 33 can be formed at a position including the corner portion 28 of the main body 20. In this case, as described above, the small space portion 33 formed in a state of being surrounded by the fixed portion and the movable portion when the movable portion operates from the first position to the second position can be largely secured, and a state where relatively large contents can be easily held can be formed. Regarding a container 200 holding juice, coffee, or the like as contents, a weight of the container 200 is generally heavier in terms of weight as compared with food or the like such as bread. In a case where such a container 200 is housed in the small space portion 33, in the conventional bag, the container 200 is likely to be brought to the center of the bottom portion of the bag, causing the bottom portion of the bag to protrude and deform downward, making the shape of the bag prone to collapse. In this case, when breads and the like are also housed in the bag in addition to the container 200, there is a problem that the breads and the like are also likely to lose their shape. From the viewpoint of such a problem, according to the bag 10 according to the first embodiment, it is possible to maintain a state where the container 200 is positioned at the corner portion 28 in the space portion 23. Therefore, the shape of the bottom portion 22 of the bag 10 is less likely to collapse, and occurrence of the problem as described above can be suppressed.[1-3 Modifications](Modification 1)

[0060] In the bag according to the first embodiment, a waterproof layer may be formed on the upper surface side of the bottom portion 22 (Modification 1). In a case where the waterproof layer is provided on the upper surface side of the bottom portion as in Modification 1, even if the liquid or the like spills inside the bag 10 in a case where the container holding liquid is stored inside the bag 10, it is possible to more reliably suppress a state where the liquid penetrates into the bottom portion 22 and the lower surface side of the bottom portion 22 of the bag 10 is wet, and leakage of the liquid from the bottom portion 22 due to breakage of the bottom portion 22. Examples of the waterproof layer include a waterproof sheet 37 laid on the upper surface side of the bottom portion 22 as illustrated in Fig. 5D, and the like. Note that the configuration in which the waterproof layer is provided on the upper surface side of the bottom portion 22 may be realized by laying the waterproof sheet 37 on the upper surface side of the bottom portion 22 after the main body 20 of the bag 10 is formed. Further, a configuration in which the waterproof sheet 37 is provided on the upper surface side of the bottom portion 22 may be realized by laying the waterproof sheet 37 on a portion of the blank material 500 intended to be the bottom portion 22, that is, on a portion corresponding to the bottom portion 22, and then folding the blank material 500 on which the waterproof sheet 37 is laid to form the main body 20. Further, the configuration in which the waterproof layer is provided on the upper surface side of the bottom portion 22 may be realized by forming a waterproof ink cured layer by curing a coating film formed by applying a waterproof ink to the portion of the blank material 500 corresponding to the bottom portion 22, and forming the main body 20 by folding the blank material 500 on which the waterproof sheet is laid.(Modification 2)

[0061] In the bag 10 according to the first embodiment, as illustrated in Fig. 6B when the restriction wall portion 31 is in the second shape state ST2, at least one position restricting member 30 may be provided at a position where the restriction wall portion 31 does not cover the corner portion 28 (Modification 2). Regarding such a position restricting member 30, as illustrated in Fig. 6C, the small space portion 33 having a sufficient size can be formed by appropriately combining shape deformation of the bag 10 and shape deformation of the position restricting member 30. However, from a viewpoint of making it difficult to form a state where the restriction wall portion 31 returns to the second shape state ST2 before the container is inserted into the bag 10 after the restriction wall portion 31 has been set to the first shape state ST1 during use of the bag 10, it is preferable that the position restricting member 30 is provided to cover the position of the corner portion 28 when the restriction wall portion 31 is in the second shape state ST2.(Modification 3)

[0062] In the bag 10 according to the first embodiment, as illustrated in Figs. 7A and 7B, one restriction wall portion 31 may be provided, and a plurality of small space portions 33 may be formed by forming the bonding margin portions 32 at a plurality of positions. In a case where the member forming the restriction wall portion 31 is disposed so as to circle around the inner surface of the peripheral wall portion 21 of the main body 20 as illustrated in Fig. 7B, a belt-shaped sheet for forming the position restricting member 30 is disposed on the blank material 500 as illustrated in Fig. 49. Then, the bonding margin portion 32 is formed according to a formation position of the small space portion 33. Other than using the blank material 500 in which the bonding margin portion 32 is disposed in this manner, the bag 10 can be obtained by performing folding at a predetermined position as described above.(Modification 4)

[0063] In the bag according to the first embodiment, as illustrated in Figs. 7C and 7D, the size of the small space portion 33 is not limited to a size corresponding to the size of one container. The size of the small space portion 33 may be set to a size in which a plurality of containers can be placed. In the example illustrated in Figs. 7C and 7D, it is possible to place two containers in the small space portion 33 as illustrated in Fig. 7D in a state where the position restricting member 30 is provided as illustrated in Fig. 7C.(Modification 5)

[0064] In the bag according to the first embodiment, as illustrated in Figs. 50A and 50B, the position restricting member 30 may be provided with a restriction wall weakened portion 40 on the restriction wall portion 31.(Restriction wall weakened portion)

[0065] The restriction wall weakened portion 40 may be a half-cut portion as illustrated in Figs. 50A and 50B. Further, the restriction wall weakened portion 40 may be a perforated portion where a penetrating portion and a non-penetrating portion are alternately formed along a predetermined direction (not illustrated). Fig. 50A is a diagram illustrating an example of the position restricting member 30 in the bag 10, and Fig. 50B is a diagram schematically illustrating the state of the longitudinal cross section taken along the D2-D2 line in Fig. 50A.

[0066] Since the restriction wall weakened portion 40 is formed, the container 200 can be easily taken out by breaking the restriction wall weakened portion 40 when the container 200 is taken out from the bag 10 after the container 200 and the like are placed in the small space portion 33.(Modification 6)

[0067] In the bag according to the first embodiment, as illustrated in Figs. 51A and 51B, the position restricting member 30 may be provided with a stripe-shaped uneven portion 42 on the restriction wall portion 31.(Stripe-shaped uneven portion)

[0068] The stripe-shaped uneven portion 42 may be formed by embossed irregularities processing as illustrated in Figs. 51A and 51B. Further, a concave structure 42A and a convex structure 42B constituting the stripe-shaped uneven portion 42 are formed in a shape extending in the vertical direction, but this is merely an example. The configuration in which the concave structure 42A and the convex structure 42B extend in a lateral direction is not prohibited in the stripe-shaped uneven portion 42. In the stripe-shaped uneven portion 42, the concave structure 42A and the convex structure 42B may extend in an oblique direction. Fig. 51A is a diagram illustrating an example of the position restricting member 30 in the bag 10, and Fig. 51B is a diagram schematically illustrating the state of the longitudinal cross section taken along the D3-D3 line in Fig. 51A.

[0069] Since the stripe-shaped uneven portion 42 is formed, flexibility can be easily imparted to the restriction wall portion 31, the container 200 and the like can be more smoothly placed in the small space portion 33, and when the container 200 is taken out from the bag 10, the container 200 can be easily taken out by slightly stretching the restriction wall portion 31.[2 Second Embodiment][2-1 Configuration]

[0070] In a bag 10 according to the second embodiment, as illustrated in Figs. 8 and 9, a position restricting member 30 has a restriction wall portion 31 and an intervening wall 50. The bag 10 according to the second embodiment has the same configuration as that of the first embodiment except that the position restricting member 30 is provided with the intervening wall 50 described above. In other words, the bag 10 according to the second embodiment includes an intervening wall 50 in the position restricting member 30 in the bag 10 according to the first embodiment. Therefore, in the description of the second embodiment, detailed descriptions of other configurations except for the intervening wall 50 of the position restricting member 30 will be omitted.(Intervening wall)

[0071] As described above, the position restricting member 30 has the intervening wall 50, and the intervening wall 50 is positioned between a peripheral wall portion 21 of the main body 10 and a restriction wall portion 31 of the position restricting member 30 in plan view of the bag 10 (when the vertical direction is set to the line-of-sight direction). The intervening wall 50 is bonded to at least the inner surface of the peripheral wall portion 21. More specifically, the intervening wall 50 is attached to the peripheral wall portion 21 in a state of being in surface contact with the inner surface of the peripheral wall portion 21, so that the intervening wall 50 and the peripheral wall portion 21 are adhered to each other. When a portion where the intervening wall 50 and the peripheral wall portion 21 are adhered is defined as an intervening wall adhesive portion 51, the intervening wall adhesive portion 51 is preferably partially formed in a region where the intervening wall 50 and the peripheral wall portion 21 face each other. Then, it is preferable that a gap space portion 52 is formed between the intervening wall 50 and the peripheral wall portion 21. Since the gap space portion 52 is formed, a layer of gas such as air can exist between the intervening wall 50 and the peripheral wall portion 21, so that it is possible to expect improvement in the heat retaining property in the space portion formed by the intervening wall 50 and the peripheral wall portion 21 in the position restricting member 30. In the second embodiment, the space portion formed by the intervening wall 50 and the peripheral wall portion 21 in the position restricting member 30 is a small space portion 33. In the examples of Figs. 8, 9A, and 9B, the intervening wall adhesive portion 51 is formed in a plurality of belt-shaped portions spaced apart in the vertical direction of the peripheral wall portion 21. However, the examples of Figs. 8 and 9 are merely examples of the intervening wall adhesive portion 51. The intervening wall adhesive portion 15 is not prohibited from being formed over the entire region where the intervening wall 50 and the peripheral wall portion 21 face each other. Further, a layout of the intervening wall adhesive portion 51 can also be appropriately set as illustrated in Figs. 11A and 11B. For example, in Fig. 11A, the layout of the intervening wall adhesive portion 51 is a layout in which a plurality of belt-shaped portions are formed spaced apart in the vertical direction of the peripheral wall portion 21 illustrated in Figs. 9A and 9B. In Fig. 11B, the layout of the intervening wall adhesive portion 51 is an oblique lattice layout formed in a plurality of obliquely intersecting belt-shaped portions.

[0072] In the second embodiment, in a case where the restriction wall portion 31 is in the second shape state ST2, as illustrated in Fig. 10, the position of the lower end of the restriction wall portion 31 is preferably located at a position above the position of the lower end of the intervening wall 50. With such a configuration, since the container can be placed in the small space portion 33 in a state where the position restricting member 30 is firmly attached to the main body 20 by the intervening wall 50, the position restricting member 30 can be expected to improve a structural reinforcing effect at the position restricting member 30 and a portion near thereof in a state where the container is placed in the small space portion 33. Note that, from a viewpoint of further enhancing the effect of improving the structural reinforcement effect, it is preferable that a lower end 50A of the intervening wall 50 is in contact with the bottom portion 22.(Blank material)

[0073] In the bag 10 illustrated in the second embodiment, the position restricting member 30 is disposed at a predetermined position on a blank material 500 for forming the main body 20. The position restricting member 30 is fixed to the blank material 500 by the intervening wall 50. Other than using the blank material 500 on which the position restricting member 30 is disposed in this manner, the bag 10 can be obtained by performing folding at a predetermined position as described in the first embodiment.[2-2 Actions and Effects]

[0074] According to the bag 10 according to the second embodiment, the same effects as those of the first embodiment can be achieved.[2-3 Modifications](Modification 1)

[0075] According to the bag 10 according to the second embodiment, the position restricting member 30 is not limited to the case where the restriction wall portion 31 and the intervening wall 50 are adhered to each other at the side end edge as illustrated in Fig. 11A. As illustrated in Fig. 11B, in the position restricting member 30, the restriction wall portion 31 and the intervening wall 50 may be formed continuously and integrally. In the example of Fig. 11B, the position restricting member 30 is formed in an annular shape because the restriction wall portion 31 and the intervening wall 50 are formed continuously and integrally. Note that, in Fig. 11A, a bonding margin portion 32 of the restriction wall portion 31 is a portion bonded to the intervening wall 50. In a case where the position restricting member 30 is formed in an annular shape, the bag 10 can be manufactured as follows. As illustrated in Fig. 48A, the position restricting member 30 is disposed at a predetermined position on the blank material 500 for forming the main body 20. The position restricting member 30 is fixed to the blank material 500 by the intervening wall 50. At this time, as illustrated in Fig. 48B, the position restricting member may be fixed to the blank material 500 by the intervening wall 50 over a partial region of the intervening wall 50 in a width direction, and the intervening wall adhesive portion 51 may be formed over a partial region of the intervening wall 50 in the width direction. Other than using the blank material 500 on which the position restricting member 30 is disposed in this manner, the bag 10 can be obtained by performing folding at a predetermined position as described in the first embodiment. Note that, as a method of disposing the position restricting member 30 at a predetermined position on the blank material 500 for forming the main body 20 in a case where the position restricting member 30 is formed in an annular shape, as illustrated in Fig. 53A, an annular body formed by winding a sheet for forming the position restricting member 30 in an annular shape and bonding overlapping end portions by adhesion or the like may be prepared in advance, and the annular body may be disposed at a predetermined position on the blank material 500. Further, as illustrated in Fig. 53B, a sheet for forming the position restricting member 30 may be wound in an annular shape, the end portions may be overlapped with each other to prepare an overlapping body PB in a state where an adhesive or the like is disposed on at least one surface of the overlapping portion (a state before the overlapping portion is bonded with the adhesive), the overlapping body PB may be disposed at a predetermined position on the blank material 500, and then the overlapping body PB may be adhered to the main body 20 with an adhesive 51A that forms the intervening wall adhesive portion 51. In the above description, the annular body (annular body formed by winding a sheet for forming the position restricting member 30 in an annular shape and bonding the overlapping end portions by adhesion or the like) is disposed on the blank material 500, but the annular body may be disposed after the blank material 500 is formed in a bag shape. In other words, the main body 20 in which the position restricting member 30 is omitted may be manufactured, and an annular body may be attached to the inner surface side of the peripheral wall portion 21 of such a main body 20. Attachment of the annular body can be realized by attaching an adhesive, a double-sided tape or the like (here, simply referred to as an adhesive or the like) to a predetermined position on the outer peripheral surface of the annular body in advance, and disposing such an annular body at a predetermined position on the inner surface side of the peripheral wall portion 21 such that the adhesive or the like is interposed between the annular body and the peripheral wall portion 21.(Modification 2)

[0076] The bag 10 according to the second embodiment may be provided with the configuration shown in the modifications of the first embodiment.[3 Third Embodiment][3-1 Configuration]

[0077] In a bag according to the third embodiment, a position restricting member 30 includes a restriction wall portion 31 and an inner bottom portion 80, or includes a restriction wall portion 31, an intervening wall 50, and an inner bottom portion 80 as illustrated in Fig. 13. A bag 10 according to the third embodiment has the same configuration as that of the first embodiment or the second embodiment except that the position restricting member 30 is provided with an inner bottom portion 80. In other words, the bag 10 according to the third embodiment has a configuration in which an inner bottom portion 80 is provided in the position restricting member 30 in the bag 10 according to the first embodiment or the second embodiment. Therefore, in the description of the third embodiment, detailed descriptions of other configurations except for the inner bottom portion 80 of the position restricting member 30 will be omitted.(Inner bottom portion)

[0078] As illustrated in Fig. 13, the position restricting member 30 has the inner bottom portion 80. The example in Fig. 13 illustrates an example of a case where the bag 10 according to the third embodiment has a configuration in which the position restricting member 30 has a bottom portion 22 in the bag 10 of the second embodiment. The inner bottom portion 80 may be referred to as a so-called small bottom portion because it is a portion smaller than the bottom portion 22.

[0079] The inner bottom portion 80 may be formed separately from a restriction wall portion 31, but is preferably formed such that the inner bottom portion 80 and the restriction wall portion 31 are continuously connected. The same applies to continuity between the inner bottom portion 80 and the intervening wall 50. In the example of Fig. 13, the inner bottom portion 80 is formed to be continuous with the intervening wall 50 at the position of the lower end of the intervening wall 50 and to be continuous with the restriction wall portion 31 at the position of the lower end of the restriction wall portion 31. The inner bottom portion 80 supports the contents (for example, a container 200) from below in the interior of a space portion 23 (in the interior of a small space portion 33). In a case where the contents are a container (a container that holds a liquid such as a beverage as container contents), "supporting the contents from below" indicates that the inner bottom portion 80 is disposed on the lower surface side of the container 200 in a case where the restriction wall portion 31 is deformed from a second shape state ST2 to a first shape state ST1 and the container 200 is placed in the small space portion 33 as illustrated in Figs. 14A and 14B, and includes both a case where the contents are supported from the lower surface side only by the inner bottom portion 80 and a case where the contents are supported from the lower surface side by the inner bottom portion 80 and the bottom portion 22.(Inclined surface)

[0080] In a case where the restriction wall portion 31 of the position restricting member 30 is in the first shape state ST1, at least a part of the inner bottom portion 80 preferably has an inclined surface 81 inclined downward in a direction approaching the peripheral wall portion 21 (in Figs. 15B and 15C, a direction approaching the intervening wall 50) from a boundary position TR between the inner bottom portion 80 and the restriction wall portion 31 as illustrated in Figs. 15B and 15C. The inclined surface 81 formed on the upper surface side of the inner bottom portion 80 may be formed over the entire region from the boundary position between the inner bottom portion 80 and the restriction wall portion 31 to a boundary position TB between the inner bottom portion 80 and the intervening wall 50, or may be formed in a region from the boundary position between the inner bottom portion 80 and the restriction wall portion 31 to a predetermined position on the inner bottom portion 80. From a viewpoint of obtaining the effect of the inclined surface 81 while firmly supporting the contents such as the container from below with the inner bottom portion 80, the inclined surface 81 is preferably formed in a region from the boundary position between the inner bottom portion 80 and the restriction wall portion 31 to a predetermined position on the inner bottom portion 80.

[0081] In a case where the restriction wall portion 31 of the position restricting member 30 is in the first shape state ST1, and the upper surface side of the inner bottom portion 80 forms the inclined surface 81 as described above, when the container as the contents is placed in the small space portion 33, as illustrated in Fig. 16, the container 200 is slightly inclined toward the side of the peripheral wall portion 21 of the main body 20, making it easier for the upper end side of the container to be pressed against the inner surface side of the peripheral wall portion 21 (the side in the direction of an arrow FE), and a state where a gap 35 is generated between the outer peripheral surface of the container main body and the upper end side of the restriction wall portion 31 is more likely to be formed. When the gap 35 is formed between the outer peripheral surface of the container main body and the upper end side of the restriction wall portion 31, even if the container contents (for example, a liquid such as a beverage, and the like) leak from the container main body, the container contents are more likely to fall into the gap 35 between the restriction wall portion 31 and the container main body, making it less likely for the container contents to spill to the outside beyond the restriction wall portion 31.(Waterproofness)

[0082] Further, it is preferable that the inner bottom portion 80 has waterproofness from a viewpoint of suppressing a case where "the spilled liquid reaches the inner bottom portion, causing the inner bottom portion to tear, and reducing a support function of the container", in a case where a liquid (a liquid such as a beverage as the container contents) spills into the gap 35 between the restriction wall portion 313 and the container main body. From a viewpoint of suppressing breakage of the position restricting member 30 due to penetration of the liquid into the position restricting member 30, it is preferable that the entire position restricting member has waterproofness.(Gusset)

[0083] As illustrated in Figs. 14A and 15A, the inner bottom portion preferably has a gusset 82 (a bottom gusset). In this case, the inner bottom portion 80 has a folding structure 83, the state of the restriction wall portion 31 of the position restricting member 30 can be smoothly changed from the first shape state ST1 to the second shape state ST2, and the state of the restriction wall portion 31 can be changed from the second shape state ST2 to the first shape state ST1. Note that, as described above, in a case where the inclined surface 81 is formed on the upper surface of the inner bottom portion 80, as illustrated in Fig. 15A, when the restriction wall portion 31 is in the second shape state, the position of the lower end of the restriction wall portion 31 is preferably located above the position of the lower end of the intervening wall 50. In this case, when the state of the restriction wall portion 31 is changed from the second shape state ST2 to the first shape state ST1, the position of the lower end of the restriction wall portion 31 is located above the position of the lower end of the intervening wall 50, so that the inclined surface 81 is more reliably formed on the upper surface of the inner bottom portion 80.[3-2 Actions and Effects]

[0084] According to the bag 10 according to the third embodiment, the same effects as those of the first embodiment can be achieved. Further, in a case where the bag 10 according to the third embodiment has the same configuration as that of the second embodiment, the same effects as those of the second embodiment can be achieved.

[0085] According to the bag according to the third embodiment, since the inner bottom portion 80 exists, it is possible to greatly reduce wetting of the bag 10 by the liquid even when a beverage leaks from the container.[3-3 Modifications](Modification 1)

[0086] According to the bag 10 according to the third embodiment, as illustrated in Figs. 17A and 17B, the intervening wall 50 may be omitted in the position restricting member 30 (Modification 1). In the examples of Figs. 17A and 17B, an outer end edge portion 84 of the inner bottom portion 80 (an end edge portion directed outward among the end edge portions of the inner bottom portion 80) is bonded to the peripheral wall portion 21. In this case, in a case where the restriction wall portion 31 is in the second shape state ST2, the position of the lower end of the restriction wall portion 31 is preferably located at a position above the position of the lower end of the outer end edge portion 84 of the inner bottom portion 80, as illustrated in Fig. 17B.(Modification 2)

[0087] In the bag 10 according to the third embodiment, an absorber that absorbs the liquid flowing down along the outer peripheral surface of the container may be provided on the upper surface of the inner bottom portion 80. Examples of the absorber include tissue paper, SAP, and the like.(Modification 3)

[0088] The bag 10 according to the third embodiment may be provided with the configuration shown in the modifications of the first embodiment or the modifications of the second embodiment.[4 Fourth Embodiment][4-1 Configuration]

[0089] A bag 10 according to the fourth embodiment has a configuration in which the position restricting member 30 of the bag 10 of any one of the first to third embodiments is provided with a restriction wall reinforcement structure.(Restriction wall reinforcement structure)

[0090] As illustrated in Figs. 18 and 19, the restriction wall reinforcement structure is a folded-back portion or a reinforcing material. Figs. 18A, 18B, and 18C illustrate an example of a case where the restriction wall reinforcement structure is a folded-back portion 100. Figs. 19A and 19B illustrate examples in which the restriction wall reinforcement structure is a reinforcing material 101.(Folded-back portion)

[0091] In a case where the restriction wall reinforcement structure is the folded-back portion 100, as illustrated in Fig. 18A, in the position restricting member 30, the folded-back portion 100 is formed at an upper end 36 of the restriction wall portion 31. In the folded-back portion 100 illustrated in Fig. 18A, a predetermined portion on the side of the upper end 36 of the restriction wall portion 31 is folded back toward the side of a facing surface 34. However, this is merely an example, and as illustrated in Fig. 18C, a predetermined portion on the side of the upper end of the restriction wall portion 313 may be folded back toward a side opposite to the side of the facing surface 34 in the folded-back portion 100. Facing portions of the folded-back portion and the unfolded-back portion in the restriction wall 1 portion may be bonded to each other with an adhesive. Note that, as illustrated in Fig. 18B, in a case where the position of the lower end of the restriction wall portion 31 is located above the position of the lower end of the intervening wall 50, it is preferable that the folded-back portion 100 is formed at the upper end 36 of the restriction wall portion 31. In a case where the position of the lower end of the restriction wall portion 31 is located above the position of the lower end of the intervening wall 50, the inclined surface 81 is easily formed on the upper surface of the inner bottom portion 80, and since the folded-back portion 100 is formed at the upper end 36 of the restriction wall portion 31, the shape of the upper end 36 of the restriction wall portion 31 is further stabilized, the shape of the gap 35 can be stabilized, and the effect of the inclined surface 81 can be further enhanced.(Reinforcing material)

[0092] In a case where the restriction wall reinforcement structure is the reinforcing material 101, as illustrated in Figs. 19A and 19B, in the position restricting member 30, the reinforcing material 101 is provided at the upper end 36 of the restriction wall portion 31. The reinforcing material 101 may be disposed on either the side of the facing surface 34 or the side of a surface opposite to the facing surface 34. The reinforcing material 101 may be disposed on each of the side of the facing surface 34 and the side of the surface opposite to the facing surface 34. Further, the material of the reinforcing material 101 is not particularly limited. Examples of the material of the reinforcing material 101 include a paper-based material, a resin (resin sheet), a metal, and the like, but it is preferable that the reinforcing material is made of a paper-based material from a viewpoint of environmental impact reduction, ease of disposal after use, and the like. As the material of the reinforcing material, it is preferable to use a material having stiffness higher than that of the position restricting member 30.(Combined use of reinforcing material and folded-back portion)

[0093] As the restriction wall reinforcement structure, as illustrated in Figs. 20A, 20B, and 20C, the reinforcing material 101 and the folded-back portion 100 may be used in combination. For example, in the examples of Figs. 20A and 20B, the reinforcing material 101 is provided at the upper end of the restriction wall portion 31, and the folded-back portion 100 is provided at the upper end of the restriction wall portion 31, and the folded-back portion 100 is formed so as to cover the reinforcing material 101 (so as to wrap the reinforcing material 101).

[0094] Note that, the case where the reinforcing material 101 and the folded-back portion 100 are used in combination is not limited to a case where the reinforcing material 101 is wrapped by the folded-back portion 100, and the reinforcing material 101 may be attached to the outside of the folded-back portion 100 as illustrated in Fig. 20C.[4-2 Actions and Effects]

[0095] According to the bag 10 according to the fourth embodiment, the same effect as those of the bag 10 of any one of the first to third embodiments can be achieved. Further, in the bag 10 according to the fourth embodiment, since the position restricting member 30 has higher stiffness, it is possible to make it less likely for the bag 10 to lose its shape when the container is placed in a small space portion 33.[4-3 Modifications](Modification 1)

[0096] In the bag 10 according to the fourth embodiment, the reinforcing material 101 may be further disposed on the surface of the restriction wall portion 31 such that the vertical direction is a longitudinal direction of the reinforcing material 101. Such an embodiment is referred to as Modification 1 of the fourth embodiment.(Modification 2)

[0097] The bag 10 according to the fourth embodiment may be provided with the configurations shown in the modifications of the first embodiment, the modifications of the second embodiment, and the modifications of the third embodiment. Such an embodiment is referred to as Modification 2 of the fourth embodiment. In Modification 2 of the fourth embodiment, Modification 1 of the fourth embodiment may be further applied.[5 Fifth Embodiment][5-1 Configuration]

[0098] As illustrated in Figs. 21A, 21B, and 21C, a bag 10 according to the fifth embodiment includes a lid portion 120 in the bag 10 of any one of the first to fourth embodiments, and an adhesive disposing portion 121 is provided on the lid portion 120. In the examples of Figs. 21A to 21C, an example of a case where a peripheral wall portion 21 has a pair of wall surface portions 25 facing each other, and the lid portion 120 and the adhesive disposing portion 121 are provided is illustrated.(Peripheral wall portion)

[0099] The peripheral wall portion 21 illustrated in the example of Fig. 21 has a pair of wall surface portions 25 facing each other. Here, the pair of wall surface portions 25 are referred to as a first wall surface portion 25A and a second wall surface portion 25B. Note that, the first wall surface portion 25A and the second wall surface portion 25B are merely specified for convenience of description, and the terms of the first wall surface portion 25A and the second wall surface portion 25B may be interchanged.(Lid portion)

[0100] A lid portion 120 is formed on the upper end of the first wall surface portion 25A so as to be capable of covering the upper end of the second wall surface portion 25B. The shape of the lid portion 120 is not particularly limited. In the example of Fig. 21B, the lid portion 120 is formed in a trapezoidal shape. From a viewpoint of forming a state where the opening portion is firmly closed by covering the upper end of the second wall surface portion 25B with the lid portion 120 as illustrated in Figs. 22A, 22B, and 22C, the lid portion 120 is preferably formed over an entire width of the first wall surface portion 25A. Figs. 22A, 22B, and 22C are diagrams for describing the state where the opening portion 24 is closed by the lid portion 120.(Adhesive disposing portion)

[0101] The lid portion 120 is preferably provided with the adhesive disposing portion 121 in which an adhesive capable of adhering to the second wall surface portion 25B is disposed in a state where the upper end of the second wall surface portion 25B is covered with the lid portion 120. The adhesive disposing portion 121 can be exemplified by a seal member or the like. Examples of the seal member include a double-sided tape and the like.(Release paper)

[0102] From a viewpoint of suppressing adhesion of dust and the like to the adhesive disposing portion 121 when the bag 10 is not used and from a viewpoint of suppressing contact of the adhesive disposing portion 121 with other unintended objects, it is preferable that a release paper 122 is attached so as to cover the surface of the adhesive disposing portion 121. The release paper 122 is configured to be capable of releasing the state of being attached to the surface of the adhesive disposing portion 121 when the bag 10 is used (by peeling off the release paper 122) from the state of being attached to the surface of the adhesive disposing portion 121 when the bag 10 is not used. As the release paper 122, a sheet material formed of a material having weak adhesiveness to the adhesive constituting an adhesive attachment portion 121 can be adopted.

[0103] Note that, the release paper 122 may be configured to be completely physically separated from the bag 10 when the bag 10 is used, but may be configured so that the release paper 122 is less likely to be separated as illustrated in Figs. 22A to 22C. The bag 10 is preferably configured such that a part of the release paper 122 remains adhered to the bag 10 even after the release paper 122 is peeled off from the adhesive attachment portion 121. In this case, it is possible to suppress the possibility that the release paper 122 is separated from the bag 10 and the release paper 122 becomes an independent waste.[5-2 Actions and Effects]

[0104] According to the bag 10 according to the fifth embodiment, the same effects as those of the bag of any one of the first to fourth embodiments can be achieved. Further, in the bag 10 according to the fifth embodiment, since the opening portion 24 of the bag 10 is closed, the heat retaining property of the space portion 23 can be enhanced.[5-3 Modifications](Modification 1)

[0105] In the bag 10 according to the fifth embodiment, as illustrated in Figs. 23A, 23B, and 23C, a gripping portion 130 may be provided at a predetermined position on the first wall surface portion 25A. Such an embodiment is referred to as Modification 1 of the fifth embodiment. In Modification 1 of the fifth embodiment, the shape of the gripping portion 130 is not particularly limited as long as the gripping portion 130 can be gripped by a user's hand. In the example illustrated in Figs. 23A to 23C, the gripping portion 130 has an outer peripheral end formed in a rectangular shape, and is provided with a chamfered rectangular through hole 131 inside. Further, in this example, the through hole 131 is a long hole formed in an elongated shape in the lateral direction.(First example of gripping portion)

[0106] In the example of Fig. 23, one embodiment of the first example of the gripping portion 130 is illustrated. In the first example, the gripping portion 130 is formed integrally with the peripheral wall portion 21. A base end of the gripping portion 130 may be at a position common to the base end of the lid portion 120 or may be formed at a position lower than the lid portion 120. As illustrated in Figs. 24A, 24B, and 24C, such a bag 10 can also form a state where the opening portion 24 is firmly closed by covering the upper end of the second wall surface portion 25B with the lid portion 120. Further, in a case where the opening portion 24 is closed, as illustrated in Figs. 24A to 24C, the gripping portion 130 rises upward, making it easier to hold the bag 10 by passing a finger of the hand through the through hole 131 of the gripping portion 130.(Second example of gripping portion)

[0107] In the example of Fig. 26, one embodiment of the second example of the gripping portion 130 is illustrated. In the second example, a handle member 140 forming the gripping portion 130 and the lid portion 120 is formed separately from the peripheral wall portion 21. In the handle member 140, an attaching portion 141 is attached to the first wall surface portion 25A with the attaching portion 141 facing the outer surface of the first wall surface portion 25A in the direction of an arrow FB, so that a state where the lid portion 120 and the gripping portion 130 are disposed on the upper end side of the first wall surface portion 25A is formed.

[0108] In both of the first example and the second example of the gripping portion 130, as illustrated in the examples of Figs. 23 and 24, the gripping portion 130 may be configured to rise upward when the upper end of the second wall surface portion 25B is covered with the lid portion 120. Further, as illustrated in the example of Fig. 26, the gripping portion 130 may be disposed to rise upward in advance. Further, in the bag 10, the lid portion 120 may be disposed such that a tip of the lid portion 120 faces downward.

[0109] According to Modification 1 of the fifth embodiment, since the gripping portion 130 is provided, it is possible to improve the ease of carrying the bag 10.(Modification 2)

[0110] In the bag 10 according to the fifth embodiment, as illustrated in Figs. 25A and 25B, a weakened portion may be provided at a predetermined position on the first wall surface portion 25A. Such an embodiment is referred to as Modification 2 of the fifth embodiment. In the examples of Figs. 25A and 25B, an example of a case where a weakened portion is provided in the bag 10 according to Modification 2 of the fifth embodiment is illustrated.(Weakened portion)

[0111] As illustrated in Figs. 25A and 25B, the weakened portion may be a perforated portion 150 in which a penetrating portion 152 and a non-penetrating portion 151 are alternately formed along a predetermined direction, or may be a half-cut portion. Fig. 25A is a diagram illustrating an example of the bag 10 when not in use, and Fig. 25B is a diagram illustrating an example of the bag 10 when in use.

[0112] The weakened portion is preferably provided on the first wall surface portion 25A at a position avoiding the lid portion 120, or at a portion of the lid portion 120 avoiding the adhesive disposing portion 121 (however, among the positions along the lid portion 120, a position closer to a base end side of the lid portion 120 than the formation position of the adhesive disposing portion 121.). Since the weakened portion is provided at such a position, the opening portion can be opened by breaking the weakened portion (closure of the opening portion by the lid portion 120 can be released).

[0113] From a viewpoint of effectively suppressing breakage of the bag 10 starting from the weakened portion, it is preferable that formation of the weakened portion is avoided near the peripheral edge of the lid portion 10. This can be realized by forming the perforated portion 150 so that the non-penetrating portion 151 is disposed near the peripheral edge of the lid portion 120 in a case where the weakened portion is the perforated portion 150 in which the penetrating portion 152 and the non-penetrating portion 151 are alternately formed along a predetermined direction.(Modification 3)

[0114] In a case where the release paper 122 is provided in the bag 10 according to the fifth embodiment, the release paper 122 may be provided with a display portion on the side of an exposed surface of the release paper 122. Such an embodiment is referred to as Modification 3 of the fifth embodiment. In Modification 3 of the fifth embodiment, examples of the display portion include a printed portion on the exposed surface of the release paper 122, a structure portion in which a printed sheet is attached to the exposed surface of the release paper 122, and the like. Since the display portion is provided, a breakdown of the contents housed in the bag can be listed on the display portion, allowing the user to recognize the contents housed in the bag 10 without opening the opening portion of the bag 10.(Modification 4)

[0115] The bag according to the fifth embodiment may be provided with the configurations shown in the modifications of the first embodiment, the modifications of the second embodiment, the modifications of the third embodiment, and the modifications of the fourth embodiment.[5-4 Reference Example]

[0116] According to the bag 10 according to the fifth embodiment, the lid portion 120 and / or the gripping portion 130 described above may be provided in a bag in which the position restricting member 30 is omitted from each of the bag bodies 10 of the first to fourth embodiments (that is, the bag 10 constituted only by the main body 20) (reference example). In the case of the reference example, the weakened portion as described above may be provided.[6 Sixth Embodiment][6-1 Configuration]

[0117] As illustrated in Figs. 64A and 64B, a bag 10 according to the sixth embodiment is provided with a receiving portion 155 on a restriction wall portion 31 of a position restricting member 30 in the bag 10 of any one of the first to fifth embodiments (excluding the reference example). The receiving portion 155 is a structure capable of receiving liquid falling from above the restriction wall portion 31. Examples of the receiving portion 155 include a groove portion 156 opened upward as illustrated in Figs. 64A and 64B, a pocket portion (not illustrated) in which an opening is formed upward, and the like. The receiving portion 155 may be provided on the side of a facing surface 34 of the restriction wall portion 31 as illustrated in the example of Fig. 64C, or may be provided on the side of the surface opposite to the facing surface 34 as illustrated in Figs. 64A and 64B. The receiving portion 155 may be formed of the same material as the restriction wall portion 31. The receiving portion 155 is preferably configured so that at least a part of its upper end side can be deformed in a direction away from the restriction wall portion 31. Such a receiving portion 155 can be realized by forming it from a shape-deformable material such as a paper-based material. Note that, Figs. 64A and 64B are cross-sectional views for describing the bag 10 according to the sixth embodiment, and Fig. 64A illustrates a portion of the restriction wall portion 31 of the position restricting member 30. Fig. 64B illustrates an example of a case where a container 200 is housed in the bag 10. Further, Fig. 64C is a cross-sectional view for describing the bag 10 according to the sixth embodiment.[6-2 Actions and Effects]

[0118] According to the bag according to the sixth embodiment, since the receiving portion 155 is formed, in a case where a container storing a liquid or the like is stored in the bag 10 as contents, when the liquid spills from the container, it becomes easier to trap the liquid with the receiving portion 155.[7 Seventh Embodiment][7-1 Configuration]

[0119] A bag 10 according to the seventh embodiment includes an adhesive member 160 as described below attached to a main body 20 in the bag 10 of any one of the first to sixth embodiments.

[0120] In the bag 10 according to the seventh embodiment, as illustrated in Figs. 27A to 27C, the main body 20 includes a bottom portion 22 and a peripheral wall portion 21 connected to the bottom portion 22, and the peripheral wall portion 21 includes a first wall surface portion 25A and a second wall surface portion 25B as a pair of wall surface portions 25 facing each other. The main body 20 forms a space portion 23 surrounded by the bottom portion 22 and the peripheral wall portion 21 and capable of storing contents (a container 200 and the like), and an opening portion 24 through which the contents are inserted into the space portion 23. In the bag 10 according to the seventh embodiment, as illustrated in Figs. 27A to 27C, an adhesive member 160 is attached to an outer surface 21B of the peripheral wall portion 21. Note that the configuration of the main body 20 (the peripheral wall portion 21 and the bottom portion 22) is similar to that described in the first to sixth embodiments, and thus a detailed description thereof will be omitted.(Adhesive member)

[0121] The adhesive member 160 includes a first adhesive surface forming portion 161 and a second adhesive surface forming portion 162. In the adhesive member 160, the first adhesive surface forming portion 161 is attached to a predetermined region on the outer surface of the first wall surface portion 25A. Furthermore, the bag 10 according to the seventh embodiment is configured so that at least a part of the second adhesive surface forming portion 162 can adhere to the outer surface of the second wall surface portion 25B in a case where a bent structure 170 to be described later is formed. The adhesive member 160 is disposed such that the second adhesive surface forming portion 162 straddles a lower end 173 of the bent structure 170.

[0122] The first adhesive surface forming portion 161 and the second adhesive surface forming portion 162 are not particularly limited as long as they are configured to enable the formation of the bent structure 170 as described later. In the example of Fig. 27B, the first adhesive surface forming portion 161 and the second adhesive surface forming portion 162 are formed in separate regions, but the first adhesive surface forming portion 161 and the second adhesive surface forming portion 162 may be connected.

[0123] The shape of the adhesive member 160 is not particularly limited as long as it can form the first adhesive surface forming portion 161 and the second adhesive surface forming portion 162. In the examples of Figs. 27A to 27C, the adhesive member 160 is formed in a U-shape, but this is merely an example. From a viewpoint of being able to stabilize the bent structure 170 and forming a grippable gap 171, the shape of the adhesive member 160 is preferably such a shape that the second adhesive surface forming portion 162 can be positioned near both end portions of the bent structure 170 separated in the longitudinal direction of the bent structure 170 and the first adhesive surface forming portion 161 can be positioned at a position deviated from the bent structure 170.(Bent structure)

[0124] The bent structure 170 is defined by a portion formed by bending the first wall surface portion 25A and the second wall surface portion 25B so that the outer surface of the first wall surface portion 25A and the outer surface of the second wall surface portion 25B face each other in a state where a predetermined portion on the upper end side of the first wall surface portion 25A (a first upper-end-side wall surface portion 165A) and a predetermined portion on the upper end side of the second wall surface portion 25B (a second upper-end-side wall surface portion 165B) overlap each other. The state where the first upper-end-side wall surface portion 165A and the second upper-end-side wall surface portion 165B overlap each other may include not only a state where the inner surface of the first upper-end-side wall surface portion 165A and the inner surface of the second upper-end-side wall surface portion 165B are in contact with each other, but also a state where a separation distance Wh between the first upper-end-side wall surface portion 165A and the second upper-end-side wall surface portion 165B is narrowed to be smaller than the sum of the thicknesses of the first upper-end-side wall surface portion 165A and the second upper-end-side wall surface portion 165B. The state where the first upper-end-side wall surface portion 165A and the second upper-end-side wall surface portion 165B overlap each other is preferably a state where the inner surface of the first upper-end-side wall surface portion 165A and the inner surface of the second upper-end-side wall surface portion 165B are in contact with each other.

[0125] Note that, in the peripheral wall portion 21, a predetermined portion on the upper end side of the peripheral wall portion 21 that is intended to constitute the bent structure 170 is referred to as a first peripheral wall portion forming portion 166, and a portion excluding the first peripheral wall portion forming portion 166 is referred to as a second peripheral wall portion forming portion 167. In other words, in a case where a state where the bent structure 170 is formed in the bag 10 is assumed, a portion forming the bent structure 170 is referred to as the first peripheral wall portion forming portion 166, and a portion excluding the first peripheral wall portion forming portion 166 is referred to as the second peripheral wall portion forming portion 167. Specifically, the first peripheral wall portion forming portion 166 is defined as a portion of the peripheral wall portion 21 defined from a portion forming the opening portion 24 to be an end portion of the peripheral wall portion 21 to a portion close to the bottom portion 22 in the portion of the peripheral wall portion 21 to be bent.

[0126] In the example of the bag 10 illustrated in Figs. 27A to 27C, the bent structure 170 is preferably formed as illustrated in Figs. 28 and 29. In other words, as illustrated in Figs. 28A and 28B, a predetermined portion of the first peripheral wall portion forming portion 166 above the upper end of the first adhesive surface forming portion 161 is folded toward the side of the second wall surface portion 25B. At this time, the upper end of the main body 20 of the bag 10 becomes a folding end (a first folding end 172). In the example of Fig. 28A, the second adhesive surface forming portion 162 protrudes upward from the first folding end 172.

[0127] In the bag 10, from a state where the first folding end 172 is set as the upper end, the first peripheral wall portion forming portion 166 is further folded at the lower end of the first peripheral wall portion forming portion 166 in a direction toward the second wall surface portion 25B. In other words, the first peripheral wall portion forming portion 166 is folded multiple times (twice in the examples of Figs. 28 and 29). At this time, the bent structure 170 is formed as illustrated in Fig. 29. Therefore, in the examples of Figs. 29A and 29B, the bent structure 170 is defined by a portion formed by bending the first wall surface portion 25A and the second wall surface portion 25B toward the side of the second wall surface portion 25B so that the outer surface of the first wall surface portion 25A and the outer surface of the second wall surface portion 25B face each other. In the examples of Figs. 29A and 29B, the bent structure 170 is a folded structure portion formed by folding multiple times. Since the bent structure 170 is the above-described folded structure portion, the bent structure 170 is a structure portion in which the opening portion 24 is hidden.

[0128] Further, in a case where the bent structure 170 is formed, as illustrated in Figs. 29A and 29B, at least a part of the second adhesive surface forming portion 162 faces the outer surface of the second wall surface portion 25B without interposing the first wall surface portion 25A. In other words, in a case where the bent structure 170 is formed, the position of the adhesive member 160 is determined so that at least a part of the second adhesive surface forming portion 162 becomes capable of adhering to the outer surface of the second wall surface portion 25B. Then, in a case where the bent structure 170 is not formed, as illustrated in Figs. 27A to 27C, adhesion of the second adhesive surface forming portion 162 to the outer surface 21B of the peripheral wall portion 21 is avoided.

[0129] In a case where the bent structure 170 is formed, it is preferable that the second adhesive surface forming portion 162 is adhered to at least the outer surface of the second wall surface portion 25B as illustrated in Figs. 30A and 30B. Since the second adhesive surface forming portion 162 is adhered to the outer surface of the second wall surface portion 25B in this manner, the bent structure 170 is easily fixed. Since the bent structure 170 is a structure portion that hides the opening portion 24 as described above, and the second adhesive surface forming portion 162 is adhered to at least the second wall surface portion 25B, it is possible to suppress a third party other than the user from opening the opening portion 24 of the bag and improperly inserting a hand into the interior of the bag 10 through the opening portion 24. Furthermore, since the second adhesive surface forming portion 162 is adhered to at least the outer surface of the second wall surface portion 25B, the bent structure 170 can be stabilized. Therefore, it is possible to stabilize the structure of the "grippable gap 171" to be described later formed along with the formation of the bent structure 170.(Gap)

[0130] It is preferable that in a case where the second adhesive surface forming portion 162 is adhered to the peripheral wall portion 21, a grippable gap 171 can be formed between the first peripheral wall portion forming portion 166 forming the bent structure 170, and the second peripheral wall portion forming portion 167 excluding the first peripheral wall portion forming portion 166, in the peripheral wall portion 21. By forming such a gap 171, the user can insert a hand into the gap 171 and carry the bag 10 with the hand. In this case, since the opening portion 24 is closed by fixing the bent structure 170, insertion of a hand into the space portion 23 from the gap 171 is restricted.(Peeling member)

[0131] As illustrated in Figs. 27 to 30, the bag 10 according to the seventh embodiment preferably has a peeling member 175 having peelability attached so as to cover the second adhesive surface forming portion 162. As the peeling member 175, so-called release paper may be suitably used. The peeling member 175 is preferably disposed so as to cover the second adhesive surface forming portion 162 in a state where the bent structure 170 is not formed. Then, the peeling member 175 is peeled off from the second adhesive surface forming portion 162 so as to expose the second adhesive surface forming portion 162 in a state where the bent structure 170 is formed.

[0132] Further, the peeling member 175 may be configured to be prevented from being completely separated from the adhesive member 160. In the example of Fig. 30A, the peeling member 175 is bonded at the end portion of the adhesive member 160 (an end portion further toward a tip side from the portion where the second adhesive surface forming portion 162 is formed), and thus even if the peeling member 175 is peeled off from the second adhesive surface forming portion 162, the state where the peeling member 175 is connected at the end portion of the adhesive member 160 is maintained.

[0133] Note that, Figs. 30A and 30B do not prohibit the peeling member 175 from being completely separable from the adhesive member 160.[7-2 Actions and Effects]

[0134] According to the bag 10 according to the seventh embodiment, since the adhesive member 160 and the bent structure 170 having the above-described configuration are formed, the grippable gap 171 can be formed, so that the user can carry the bag 10 by inserting the hand into the gap 171. Further, since the adhesive member 160 and the bent structure 170 are formed, the bent structure 170 is stabilized, and a state where the opening portion 24 is hidden can be stably formed. Therefore, it is possible to suppress a possibility that a third party improperly inserts a hand into the space portion 23 through the opening portion 24.[7-3 Modifications](Modification 1)

[0135] In the bag 10 according to the seventh embodiment, in the example of Fig. 29, in a case where the bent structure 170 is formed, the second adhesive surface forming portion 162 is configured to be capable of adhering to the second wall surface portion 25B, but this is merely an example. The bag 10 according to the seventh embodiment may be configured so that the second adhesive surface forming portion 162 can be adhered to the first wall surface portion 25A and the second wall surface portion 25B in a case where the bent structure 170 is formed (Modification 1). In this case, in a case where the bent structure 170 is formed, the second adhesive surface forming portion 162 is preferably disposed so as to straddle the lower end 173 of the bent structure 170 and is adhered to the outer surface of the first wall surface portion 25A and the outer surface of the second wall surface portion 25B. Since the bent structure 170 is a structure portion that hides the opening portion 24 as described above, and the second adhesive surface forming portion 162 is adhered to at least both the outer surface of the first wall surface portion 25A and the outer surface of the second wall surface portion 25B, it is possible to more effectively suppress a third party other than the user from improperly opening the opening portion 24 of the bag 10. In other words, since the second adhesive surface forming portion 162 is disposed across the lower end 173 of the bent structure 170 and is adhered to the first wall surface portion 25A and the second wall surface portion 25B, in a case where a third party other than the user improperly opens the opening portion 24 of the bag 10, traces of the improper act are likely to remain due to breakage of the adhesive member 160 or the like, so that it is possible to more effectively suppress improper insertion of a hand into the interior of the bag 10 through the opening portion 24.(Modification 2)

[0136] In the bag 10 according to the seventh embodiment, as illustrated in Figs. 36A and 36B, the bent structure 170 may be defined by a portion formed by bending the first wall surface portion 25A and the second wall surface portion 25B toward the side of the first wall surface portion 25A in a state where the outer surface of the first wall surface portion 25A and the outer surface of the second wall surface portion 25B face each other.[7-3 Reference Example]

[0137] In the bag 10 according to the seventh embodiment, the above-described adhesive member 160 may be provided in a bag in which the position restricting member 30 is omitted from each of the bag bodies 10 of the first to sixth embodiments (that is, a bag constituted only by the main body as illustrated in Fig. 31) (reference example). Further, as illustrated in Fig. 32, the main body 20 may be provided with an adhesive disposing portion 179 for closing the opening portion 24 on the inner surface 21A of the peripheral wall portion 21. In the example of Fig. 32, the adhesive disposing portion 179 for closing 24 is provided on the upper end side of the peripheral wall portion 21 and on the inner surface side of the peripheral wall portion 21. The adhesive disposing portion can be exemplified by a double-sided adhesive tape or the like.[8 Eighth Embodiment][8-1 Configuration]

[0138] A bag 10 according to the eighth embodiment includes a seal sheet 180 as described below in the bag 10 of any one of the first to seventh embodiments.

[0139] In the bag 10 according to the eighth embodiment, a main body 20 includes a bottom portion 22 and a peripheral wall portion 21 connected to the bottom portion 22, and the peripheral wall portion 21 includes a first wall surface portion 25A and a second wall surface portion 25B as a pair of wall surface portions 25 facing each other. The main body 20 forms a space portion 23 surrounded by the bottom portion 22 and the peripheral wall portion 21 and capable of storing contents, and an opening portion 24 through which the contents are inserted into the space portion 23. In the bag 10 according to the eighth embodiment, as illustrated in Figs. 33A to 33B, a seal sheet 180 is attached to the outer surface 21B of the peripheral wall portion 21. Note that the configuration of the main body 20 (the peripheral wall portion 21, the bottom portion 22, and the like) is similar to that described in the first to seventh embodiments, and thus a detailed description thereof will be omitted. In each figure (Figs. 33 to 35, Fig. 37, and the like) illustrating an example of the eighth embodiment, description regarding the position restricting member 30 is omitted for convenience of description.(Seal sheet)

[0140] The seal sheet 180 includes a seal member 181 in a detachable manner, and has a structure in which the seal member 181 is detachably attached onto a seal base 182 in the examples of Figs. 33A and 33B. The seal member 181 has an adhesive surface forming portion 183, and is detachably attached to the surface of the seal base 182 in a state where the adhesive surface forming portion 183 faces the seal base 182. Note that the term "detachably" means that the seal member can be peeled off from and re-adhered to the surface of the seal base 182. Further, the case of "capable of being re-adhered" includes a case where an adhesive force of the seal member 181 to the seal base 182 is reduced during re-adhering. The seal sheet 180 is attached to a predetermined region on the outer surface 21B of the peripheral wall portion 21. Furthermore, in the bag 10 according to the seventh embodiment, the seal sheet 180 is attached to the outer surface 21B of the peripheral wall portion 21 so as to avoid the portion of the peripheral wall portion 21 that forms a bent structure 170. Note that, in the examples of Figs. 33A and 33B, the seal sheet 180 is attached to the second wall surface portion 25B of the peripheral wall portion 21, but this is merely an example. At least a part of the seal sheet 180 may be attached to a portion separated from the second wall surface portion 25B.(Seal member)

[0141] In a case where the bent structure 170 to be described later is formed, the seal member 181 is disposed so as to straddle the lower end 173 of the bent structure 170 (condition 1). The seal member 181 is configured to be capable of adhering to the peripheral wall portion 21 in a state where the adhesive surface forming portion 183 faces the first wall surface portion 25A and the second wall surface portion 25B in a case where the bent structure 170 is formed (condition 2).

[0142] The shape and number of the seal member 181 provided in the seal sheet 180 are not particularly limited as long as they are configured to satisfy the conditions 1 and 2 described above. In the examples of Figs. 33A and 33B, the seal member 181 is composed of two rectangular sheet materials having a predetermined size.(Seal base)

[0143] As the seal base 182, a member having a surface with peelability on one side can be suitably used. By attaching a rear surface side of the seal base 182 to the peripheral wall portion 21 with the surface with peelability used as a front surface (the surface with peelability to the seal member 181 is directed to a front side), the seal base is disposed on the outer surface 21B of the peripheral wall portion 21.(Bent structure)

[0144] In the bag 10 according to the eighth embodiment, the bent structure 170 is specified with the same definition as the bent structure 170 described in the seventh embodiment. In other words, the bent structure 170 is defined by a portion formed by bending the first wall surface portion 25A and the second wall surface portion 25B so that the outer surface of the first wall surface portion 25A and the outer surface of the second wall surface portion 25B face each other in a state where a predetermined portion on the upper end side of the first wall surface portion 25A (a first upper-end-side wall surface portion 165A) and a predetermined portion on the upper end side of the second wall surface portion 25B (a second upper-end-side wall surface portion 165B) overlap each other.

[0145] The first upper-end-side wall surface portion 165A and the second upper-end-side wall surface portion 165B are also specified with the same definition as the first upper-end-side wall surface portion 165A and the second upper-end-side wall surface portion 165B of the bent structure 170 described in the seventh embodiment. Here, as described in the seventh embodiment, in the peripheral wall portion 21, a predetermined portion on the upper end side of the peripheral wall portion 21 intended to constitute the bent structure 170 is referred to as a first peripheral wall portion forming portion 166, and a portion excluding the first peripheral wall portion forming portion 166 is referred to as a second peripheral wall portion forming portion 167. In other words, in a case where a state where the bent structure 170 is formed in the bag 10 is assumed, a portion forming the bent structure 170 is referred to as the first peripheral wall portion forming portion 166, and a portion excluding the first peripheral wall portion forming portion 166 is referred to as the second peripheral wall portion forming portion 167. Specifically, the first peripheral wall portion forming portion 166 is defined as a portion of the peripheral wall portion 21 defined from a portion forming the opening portion 24 to be an end portion of the peripheral wall portion 21 to a portion close to the bottom portion 22 in the portion of the peripheral wall portion 21 to be bent.

[0146] In the example of bag 10 illustrated in Fig. 33A, the bent structure 170 is preferably formed as illustrated in Figs. 33B, 37A, and 37B. In other words, as illustrated in Figs. 33B, 37A, and 37B, the first peripheral wall portion forming portion 166 is folded back multiple times toward the side of the second wall surface portion 25B in a state where the first upper-end-side wall surface portion 165A and the second upper-end-side wall surface portion 165B overlap each other. At this time, as illustrated in Figs. 33B, 37A, and 37B, the bent structure 170 is formed. Therefore, in the examples of Figs. 33B, 37A, and 37B, the bent structure 170 is defined by a portion formed by bending the first wall surface portion 25A and the second wall surface portion 25B toward the side of the second wall surface portion 25B in a state where the outer surface of the first wall surface portion 25A and the outer surface of the second wall surface portion 25B face each other (in a state where the outer surface of the first wall surface portion 25A and the outer surface of the second wall surface portion 25B overlap each other). In the examples of Figs. 33B, 37A, and 37B, the bent structure 170 is a folded structure portion formed by folding multiple times. Since the bent structure 170 is the above-described folded structure portion, the bent structure 170 is a structure portion in which the opening portion 24 is hidden.

[0147] Note that, the bent structure 170 illustrated in Fig. 33B is merely an example. The bent structure 170 may be defined by a portion formed by bending the first wall surface portion 25A and the second wall surface portion 25B toward the side of the first wall surface portion 25A in a state where the outer surface of the first wall surface portion 25A and the outer surface of the second wall surface portion 25B face each other.

[0148] In a case where the bent structure 170 is formed, the seal member 181 is peeled off from the seal sheet 180 as illustrated in Figs. 33B and 37A. Then, the seal member 181 is disposed on the outer surface 21B of the peripheral wall portion 21 so as to straddle the lower end 173 of the bent structure 170. At this time, the seal member 181 is adhered to the peripheral wall portion 21 in a state where the adhesive surface forming portion 183 faces the first wall surface portion 25A and the second wall surface portion 25B. The seal member 181 is adhered to the first wall surface portion 25A and the second wall surface portion 25B in this manner, so that the bent structure 170 is fixed.

[0149] Note that, in the example illustrated in Fig. 33B, the seal member 181 is disposed near both end portions along the longitudinal direction of the bent structure 170, but this is merely an example.

[0150] In the bag 10 according to the eighth embodiment, in a case where the seal member 181 is adhered to the peripheral wall portion 21, as also illustrated in Fig. 37B, a grippable gap 171 can be formed between the first peripheral wall portion forming portion 166 forming the bent structure 170 and the second peripheral wall portion forming portion 167 excluding the first peripheral wall portion forming portion 166, in the peripheral wall portion 21, as described in the seventh embodiment. By forming such a gap 171, the user can insert a hand into the gap 171 and carry the bag 10 with the hand.[8-2 Actions and Effects]

[0151] According to the bag 10 according to the eighth embodiment, since the seal member 181 is provided, in a case where the bent structure 170 is formed, the grippable gap 171 can be stably formed as a structure, so that the user can carry the bag 10 by inserting the hand into the gap 171. Further, since the bent structure 170 is fixed by the seal member 181, the bent structure 170 is stabilized, and a state where the opening portion 24 is hidden can be stably formed. Therefore, it is possible to suppress a possibility that a third party improperly inserts a hand into the space portion 23 through the opening portion 24.[8-3 Modifications](Modification 1)

[0152] In the eighth embodiment, as illustrated in Figs. 34A, 34B, 35A, and 35B, the seal member 181 may have a through hole 184 (Modification 1). In this case, the through hole 184 is configured to expose the gap 171 from the through hole 184 in a case where the seal member 181 is adhered to the outer surface 21B of the peripheral wall portion 21. Figs. 34A and 34 illustrate an example of a case where one through hole 184 is formed, and Figs. 35A and 35B illustrate an example of a case where a plurality of (three in Figs. 35A and 35B) through holes 184 are formed.[8-4 Reference Examples](Reference Example 1)

[0153] In the bag according to the eighth embodiment, the above-described seal sheet 180 may be provided in a bag 10 in which the position restricting member 30 is omitted from each of the bag bodies 10 of the first to sixth embodiments (that is, a bag 10 constituted only by the main body 20 as illustrated in Fig. 31) (Reference Example 1). In the case of the reference example, as illustrated in Fig. 32, an adhesive disposing portion 179 for closing the opening portion 24 may be provided. The adhesive disposing portion 179 for closing the opening portion 24 is provided on the upper end side of the peripheral wall portion 21 and on the side of the inner surface 21A of the peripheral wall portion 21. The adhesive disposing portion 179 can be exemplified by a double-sided adhesive tape or the like.(Reference Example 2)

[0154] In the bag 10 according to the eighth embodiment, the seal sheet 180 was attached to the main body 20 of the bag 10, but a combination of the bag 10 and the seal sheet 180 may be used in a state where the seal sheet 180 is detached from the main body 20 of the bag 10 (Reference Example 2). In Reference Example 2, the seal sheet 180 may be stored in advance in the space portion 23 of the bag 10.[9 Ninth Embodiment]

[0155] A bag 10 according to the ninth embodiment includes a bag weakened portion 190 as described below in the bag 10 according to any one of the first to eighth embodiments.

[0156] In the bag 10 according to the ninth embodiment, a main body 20 includes a bottom portion 22 and a peripheral wall portion 21 connected to the bottom portion 22, and the peripheral wall portion 21 includes a first wall surface portion 25A and a second wall surface portion 25B as a pair of wall surface portions 25 facing each other. The main body 20 forms a space portion 23 surrounded by the bottom portion 22 and the peripheral wall portion 21 and capable of storing contents, and an opening portion 24 through which the contents are inserted into the space portion 23. In the bag 10 according to the ninth embodiment, as illustrated in Figs. 38A to 38B, a bag weakened portion 190 is formed in the peripheral wall portion 21. Note that the configuration of the main body 20 (the peripheral wall portion 21, the bottom portion 22, and the like) is similar to that described in the first to eighth embodiments, and thus a detailed description thereof will be omitted. In each figure (Fig. 38) illustrating an example of the ninth embodiment, description regarding the position restricting member 30 is omitted for convenience of description. Fig. 38 illustrates an example of a case where the bag weakened portion 190 is formed on the second wall surface portion 25B of the peripheral wall portion 21 of the main body for the bag according to the fifth embodiment.(Bag weakened portion)

[0157] The bag weakened portion 190 is specified as a structurally weakened portion compared to a portion of the peripheral wall portion 21 different from the bag weakened portion 190. As the bag weakened portion 190, a perforated structure portion and a half-cut portion can be exemplified. Note that, from a viewpoint of keeping the temperature of the interior of the bag 10 as much as possible, the bag weakened portion 190 is preferably a half-cut portion. The half-cut portion can be specified as a structure portion in which the peripheral wall portion 21 is cut into a predetermined depth in a thickness direction of the peripheral wall portion 21. The depth of the "cut into the peripheral wall portion 21" forming the half-cut portion is not limited to a portion cut into the peripheral wall portion 21 to a half of the thickness of the peripheral wall portion 21. The depth of the cut into the peripheral wall portion 21 may exceed a half of the thickness of the peripheral wall portion 21 or may be less than a half of the thickness of the peripheral wall portion 21. The half-cut portion may be formed by being cut from the inner surface 21A toward the outer surface 21B of the peripheral wall portion 21, or may be formed by being cut from both surfaces of the outer surface 21B and the inner surface 21A of the peripheral wall portion 21 in the thickness direction of the peripheral wall portion 21. The half-cut portion is preferably formed by being cut from the inner surface 21A toward the outer surface 21B of the peripheral wall portion 21.

[0158] The bag weakened portion 190 is formed in a U-shape in the example of Fig. 38, but this is merely an example. The shape of the bag weakened portion 190 is not particularly limited. Further, a lid surface portion 191 is formed by breaking the bag weakened portion 190, or the space portion 23 of the bag 10 can be exposed by turning the lid surface portion 191 outward and breaking the bag weakened portion 190, allowing the contents stored in the space portion 23 to be taken out. In the examples of Figs. 38A and 38B, the lid surface portion 191 is turned up so as to be pulled upward and outward from the bottom, so that breakage of the bag weakened portion 190 is advanced, and the space portion 23 of the bag 10 can be exposed. However, this is merely an example of the lid surface portion 191. The lid surface portion 191 may be formed so as to expose the space portion 23 of the bag 10 by turning (turning down) the lid surface portion 191 downward and outward from the top, or the lid surface portion 191 may be formed so as to expose the space portion 23 of the bag 10 by turning the lid surface portion 191 in a door shape.

[0159] The bag weakened portion 190 is formed on the second wall surface portion 25B in the example of Fig. 38, but this is merely an example. It may be formed on the first wall surface portion 25A, or may be formed on both surfaces of the first wall surface portion 25A and the second wall surface portion 25B. Further, the bag weakened portion 190 may be formed on an entire surface of the peripheral wall portion 21. Further, the bag weakened portion 190 may be formed so as to encircle an entire circumference of the peripheral wall portion 21.(Tab)

[0160] From a viewpoint of facilitating displacement of the lid surface portion 191, it is preferable that a tab 192 is provided on the lid surface portion 191. When a user pinches the tab 192 and pulls it outward, the lid surface portion 191 can be displaced (turned) and the breakage of the bag weakened portion 190 can be advanced. Then, as the lid surface portion 191 is displaced and the breakage of the bag weakened portion 190 is advanced, a state where the space portion 23 of the bag 10 is exposed is formed, allowing the contents stored in the space portion 23 to be taken out.[10 Tenth Embodiment][10-1 Configuration]

[0161] As illustrated in Figs. 39A, 39B, and 39C, a bag 10 according to the tenth embodiment includes a lid portion 120 in the bag 10 according to any one of the first to fourth embodiments similarly to the fifth embodiment, and an adhesive disposing portion 121 is provided on the lid portion 120, and a lid portion penetrating portion 193 and a main body penetrating portion 195 are formed on each of the lid portion 120 and a main body 20 so as to be capable of forming a gripping structure portion 194 that can function as a handle for the bag 10 in a state where an opening portion 24 of the main body 20 is closed by the lid portion 120.

[0162] In the bag 10 according to the tenth embodiment, the main body 20 includes a bottom portion 22 and a peripheral wall portion 21 connected to the bottom portion 22, and the peripheral wall portion 21 includes a first wall surface portion 25A and a second wall surface portion 25B as a pair of wall surface portions facing each other. The main body 20 forms a space portion 23 surrounded by the bottom portion 22 and the peripheral wall portion 21 and capable of storing contents, and an opening portion 24 through which the contents are inserted into the space portion 23. In the examples of Figs. 39A to 39C, an example is illustrated in a case where the peripheral wall portion 21 has a pair of wall surface portions 25 facing each other, and the lid portion 120 and the adhesive disposing portion 121 are provided.

[0163] In the peripheral wall portion illustrated in the example of Fig. 39, the pair of wall surface portions 25 facing each other are referred to as the first wall surface portion 25A and the second wall surface portion 25B for convenience. In other words, the first wall surface portion 25A and the second wall surface portion 25B are merely specified for convenience of description, and the terms of the first wall surface portion 25A and the second wall surface portion 25B may be interchanged.

[0164] In the bag 10 according to the tenth embodiment, the lid portion 120 and the adhesive disposing portion 121 are formed at the upper end of the first wall surface portion 25A, as described in the fifth embodiment. Further, as illustrated in the example of Fig. 39, in the bag according to the tenth embodiment, it is preferable that a release paper 122 is provided in the same manner as described in the fifth embodiment. The configurations of the lid portion 120, the adhesive disposing portion 121, and the release paper 122 are similar to those described in the fifth embodiment, and thus detailed descriptions thereof will be omitted.(Lid portion penetrating portion and main body penetrating portion)

[0165] The bag 10 according to the tenth embodiment includes the lid portion penetrating portion 193 and the main body penetrating portion 195. The lid portion penetrating portion 193 is preferably formed inside the outer peripheral edge of the region where the adhesive disposing portion 121 is formed. In the example of Fig. 39, the lid portion penetrating portion 193 is configured by a through hole formed in a rectangular shape in the lid portion 120. In a case where the release paper 122 is attached to the lid portion 120, the lid portion penetrating portion 193 is preferably formed to avoid the release paper 122.

[0166] The main body penetrating portion 195 is formed at a predetermined position on the peripheral wall portion 21 of the main body 20. The main body penetrating portion 195 is formed at a position facing the lid portion penetrating portion 193 in a case where the opening portion 24 is covered with the lid portion 120. In the example of Fig. 39, the main body penetrating portion 195 is configured by a through hole formed in a rectangular shape in the peripheral wall portion 21. The main body penetrating portion 195 is formed on both the first wall surface portion 25A and the second wall surface portion 25B, and it is preferable that a formation position of the main body penetrating portion 195 on the first wall surface portion 25A and a formation position of the main body penetrating portion 195 on the second wall surface portion 25B are substantially aligned.(Gripping structure portion)

[0167] In the bag 10, in a state where the upper end of the second wall surface portion 25B is covered with the lid portion 120 (in a case where a state where the opening portion 24 is closed by covering the upper end of the second wall surface portion 25B with the lid portion 120 is formed), the position of the lid portion penetrating portion 193 is substantially aligned with the formation position of the main body penetrating portion 195 on the second wall surface portion 25B. At this time, the position of the lid portion penetrating portion 193, the formation position of the main body penetrating portion 195 on the second wall surface portion 25B, and the formation position of the main body penetrating portion 195 on the first wall surface portion 25A are substantially aligned, resulting in a state where the gripping structure portion 194 is formed by the lid portion penetrating portion 193 and the main body penetrating portion 195.[10-2 Actions and Effects]

[0168] According to the bag 10 according to the tenth embodiment, in a case where a state where the opening portion 24 is closed by covering the upper end of the second wall surface portion 25B with the lid portion 120 is formed, the user can easily carry the bag 10 by using the gripping structure portion 194 as a handle. The lid portion penetrating portion 193 can be a portion having high stiffness by using the periphery as the adhesive disposing portion 121, thereby enabling the gripping structure portion 194 to have a sturdy structure.[10-3 Modifications](Modification 1)

[0169] In the bag according to the tenth embodiment, the shapes of the lid portion penetrating portion 193 and the main body penetrating portion 195 are not limited to the rectangular shape, and may be other shapes (Modification 1). In the bag 10 according to Modification 1 of the tenth embodiment, for example, the shapes of the lid portion penetrating portion 193 and the main body penetrating portion 195 may be an elliptical shape as illustrated in Fig. 41, or may be a triangular shape, a polygonal shape, and an irregular shape. Further, the shapes of the lid portion penetrating portion 193 and the main body penetrating portion 195 may be the same or different from each other.(Modification 2)

[0170] In the bag 10 according to the tenth embodiment, the lid portion penetrating portion 193 may be formed in a slit shape as illustrated in Figs. 42 to 47 (Modification 2). In Modification 2, the lid portion penetrating portion 193 is preferably formed in a shape that forms a gripping structure reinforcement portion 196.(Gripping structure reinforcement portion)

[0171] The gripping structure reinforcement portion 196 can be specified as a portion having a structure in which an entire gripping structure reinforcement portion 196 from the base end to a tip TP (tip TP of the gripping structure reinforcement portion 196) is rotatable with a straight line connecting both ends (positions HP1 and HP2) of the lid portion penetrating portion 193 in the longitudinal direction as a base end BP (base end BP of the gripping structure reinforcement portion 196), and with the base end BP as a rotation axis.(First example of lid portion penetrating portion and gripping structure reinforcement portion)

[0172] Figs. 42, 43, and 46B illustrate a first example of the lid portion penetrating portion 193 and the gripping structure reinforcement portion 196. In the first example, as illustrated in Fig. 42, the lid portion penetrating portion 193 is formed so that the gripping structure reinforcement portion 196 is in a state where the base end BP is positioned on the upper side and the tip TP is positioned on the lower side, in a state where the tip of the lid portion 120 is directed upward.

[0173] In a case where a state where the opening portion 24 is closed by covering the upper end of the second wall surface portion 25B with the lid portion 120 is formed, as illustrated in Figs. 43A to 43C, the gripping structure reinforcement portion 196 is in a state where the base end BP is positioned on the lower side and the tip TP is positioned on the upper side. Note that, as illustrated in Fig. 46B, in this case, the gripping structure reinforcement portion 196 is preferably folded toward the side of the space portion 23. When folded toward the side of the space portion 23, the gripping structure reinforcement portion 196 passes through the main body penetrating portion 195 of the second wall surface portion 25B and the main body penetrating portion 195 of the first wall surface portion 25A, allowing the tip TP of the gripping structure reinforcement portion 196 to be positioned on the outer surface side of the first wall surface portion 25A (the side of the outer surface 21B of the peripheral wall portion 21). Then, the structure of the gripping structure portion 194 can be reinforced by folding back the tip TP of the gripping structure reinforcement portion 196 toward the outer surface side of the first wall surface portion 25A. Note that, it is preferable that an adhesive is provided on the gripping structure reinforcement portion 196, at a portion facing the outer surface side of the first wall surface portion 25A in a case where the tip TP of the gripping structure reinforcement portion 196 is folded back toward the outer surface side of the first wall surface portion 25A. In this case, a predetermined portion on the side of the tip TP of the gripping structure reinforcement portion 196 can be adhered to the outer surface side of the first wall surface portion 25A, and thus the structure of the gripping structure portion 194 can be further reinforced. Further, in this case, since the exposure of the space portion 23 can be reduced by the gripping structure reinforcement portion 196, it is possible to suppress a possibility that a third party or the like improperly inserts a hand into the space portion 23.(Second example of lid portion penetrating portion and gripping structure reinforcement portion)

[0174] Figs. 44, 45, and 46A illustrate a second example of the lid portion penetrating portion 193 and the gripping structure reinforcement portion 196. In the second example, as illustrated in Fig. 44, the lid portion penetrating portion 193 is formed so that the gripping structure reinforcement portion 196 is in a state where the base end BP is positioned on the lower side and the tip TP is positioned on the upper side, in a state where the tip of the lid portion 120 is directed upward.

[0175] In the second example, in a case where a state where the opening portion 24 is closed by covering the upper end of the second wall surface portion 25B with the lid portion 120 is formed, as illustrated in Figs. 45A to 45C, the gripping structure reinforcement portion 196 is in a state where the base end BP is positioned on the upper side and the tip TP is positioned on the lower side. Note that, as illustrated in Fig. 46B, in this case, the gripping structure reinforcement portion 196 is preferably folded toward the side of the space portion 23. This is because, similarly to the first example, the structure of the gripping structure portion 194 can be reinforced by folding back a predetermined portion on the side of the tip TP of the gripping structure reinforcement portion 196 toward the outer surface side of the first wall surface portion 25A, in a state where the tip TP of the gripping structure reinforcement portion 196 passes through the main body penetrating portion 195 of the second wall surface portion 25B and the main body penetrating portion 195 of the first wall surface portion 25A. Note that, unlike the first example, in the second example, the tip TP is folded upward.(Third example of lid portion penetrating portion and gripping structure reinforcement portion)

[0176] Figs. 47A and 47B illustrate a third example of the lid portion penetrating portion 193 and the gripping structure reinforcement portion 196. In the third example, as illustrated in Fig. 47A, the lid portion penetrating portion 193 is formed so that in a state where the tip of the lid portion 120 is directed upward, a first gripping structure reinforcement portion 196A in a state where the base end BP is positioned on the upper side and the tip TP is positioned on the lower side, and a second gripping structure reinforcement portion 196B in a state where the base end BP is positioned on the upper side and the tip TP is positioned on the lower side, are formed as the gripping structure reinforcement portion 196. In Fig. 47A, the lid portion penetrating portion 193 is formed with an H-shaped slit structure. In the third example, as illustrated in Fig. 47B, it is possible to form a structure for reinforcing the structure of the gripping structure portion 194 described in the first example and the second example described above, and thus, it is possible to achieve the effects associated therewith.[10-4 Reference Example]

[0177] In the bag 10 according to the tenth embodiment, the above-described lid portion penetrating portion 193 and main body penetrating portion 195 may be provided in a bag 10 in which the position restricting member 30 is omitted from each of the bag bodies 10 of the first to fourth embodiments (that is, a bag constituted only by the main body 20 as illustrated in Fig. 31) (reference example). In the case of the reference example, as illustrated in Fig. 32, an adhesive disposing portion 179 for closing the opening portion 24 may be provided. The adhesive disposing portion 179 for closing the opening portion 24 is provided on the upper end side of the peripheral wall portion 21 and on the side of the inner surface 21A of the peripheral wall portion 21. The adhesive disposing portion 179 can be exemplified by a double-sided adhesive tape or the like.[11 Eleventh Embodiment][11-1 Configuration]

[0178] As illustrated in the examples of Figs. 54A, 54B, 54C, and 54D, a bag 10 according to the eleventh embodiment may be provided with a small piece portion 220 and a peeling enabling portion 221 in the bag of any one of the first to tenth embodiments. Figs. 54A to 54D are diagrams for describing an example of the eleventh embodiment.

[0179] The bag 10 according to the eleventh embodiment includes a main body 20. The main body 20 has a bottom portion 22 and a peripheral wall portion 21 connected to the bottom portion 22 at the peripheral edge of the bottom portion 22. The peripheral wall portion 21 includes a first wall surface portion 25A and a second wall surface portion 25B as a pair of wall surface portions 25 facing each other. The main body 20 forms a space portion 23 surrounded by the bottom portion 22 and the peripheral wall portion 21 and capable of storing contents, and an opening portion 24 through which the contents are inserted into the space portion 23. The example of Figs. 54A to 54C illustrates an example of a case where the peripheral wall portion 21 has a pair of wall surface portions 25 facing each other and the small piece portion 220 and the peeling enabling portion 221 are provided.

[0180] In the peripheral wall portion 21 illustrated in the example of Fig. 54, the pair of wall surface portions 25 facing each other are referred to as the first wall surface portion 25A and the second wall surface portion 25B for convenience. In other words, the first wall surface portion 25A and the second wall surface portion 25B are merely specified for convenience of description, and the terms of the first wall surface portion 25A and the second wall surface portion 25B may be interchanged.(Small piece portion)

[0181] The bag 10 according to the tenth embodiment includes a small piece portion 220 in the peripheral wall portion 21. The small piece portion 220 has an adhesive adhering surface 223 on which an adhesive material is disposed. The adhesive adhering surface 223 of the small piece portion 220 is formed in "a region capable of facing the inner surface of the wall surface portion 25 connected to the small piece portion 220, and a region capable of facing the outer surface of the wall surface portion 25 facing the wall surface portion 25 connected to the small piece portion 220", on the small piece portion 220, in a case where the small piece portion 220 is rotated about a fixed end 226 of the small piece portion 220 as an axis. Specifically, in the examples of Figs. 54A to 54D, the small piece portion 220 is formed as a portion extending from the first wall surface portion 25A. Then, the adhesive adhering surface 223 of the small piece portion 220 is formed to be "a region that can face the inner surface of the first wall surface portion 25A and a region that can face the outer surface of the second wall surface portion 25B facing the first wall surface portion 25A" on the small piece portion 220, in a case where the small piece portion 220 is rotated about the fixed end 226 of the small piece portion 220 as an axis.

[0182] The small piece portion 220 has a fixed end 226 fixed to the peripheral wall portion 21 and a free end 227 displaceable relative to the peripheral wall portion 21. The small piece portion 220 is a portion capable of rotating the free end 227 around at least the fixed end 226 as an axis. In the example of Fig. 54, the small piece portion 220 has the fixed end 226 at a part of an upper end 225 of the first wall surface portion 25A, is formed as a portion that is extended in a substantially rectangular shape from the upper end 225 of the first wall surface portion 25A, and has a tip of the extended portion (a position on the tip side of the small piece portion 220) as the free end 227. In the example of Fig. 54, the small piece portion 220 is formed of a material similar to the material of the first wall surface portion 25A, and a portion near the fixed end 226 of the small piece portion 220 can be bent so as to rotate the small piece portion 220 around the fixed end 226 of the small piece portion 220 as an axis. The shape of the small piece portion 220 is generally rectangular. However, the small piece portion illustrated in Fig. 54 is merely an example, and the small piece portion is not limited to this example. For example, the small piece portion 220 may be a portion extending from a predetermined position below the upper end 225 of the first wall surface portion 25A. Further, the material of the small piece portion 220 may be different from the material of the first wall surface portion 25A.

[0183] The number of the small piece portions 220 is not particularly limited. Further, the shape of the small piece portion 220 is not particularly limited. In the examples of Figs. 54A to 54D, two small piece portions 220 are formed. In a case where a plurality of small piece portions 220 are provided, for example, the small piece portions 220 may be unevenly distributed on the first wall surface portion 25A, or some small piece portions 220 may be located on the first wall surface portion 25A, and other small piece portions 220 may be located on the second wall surface portion 25B.(Adhesive adhering surface)

[0184] A layer 222 made of an adhesive material is formed on the small piece portion 220, and a surface of the layer 222 (a surface facing a small piece portion opposing surface 224) is an adhesive adhering surface 223. Note that the adhesive material forming the layer 222 is not particularly limited, and starch-based glue, acrylic adhesive, and the like can be exemplified. Note that, in a case where a container storing juice or coffee is stored in the bag 10, or in a case where food such as potato or a hamburger is stored, it is preferable that an adhesive usable when packaging the food is used as the adhesive material.(Peeling enabling portion)

[0185] The peeling enabling portion 221 is a portion configured to be capable of removably adhering to the small piece portion 220. In the peeling enabling portion 221, a surface constituted by a region corresponding to the portion configured to be capable of adhering to the small piece portion 220 is referred to as a small piece portion opposing surface 224. Therefore, the peeling enabling portion 221 has the small piece portion opposing surface 224. Then, the small piece portion opposing surface 224 can be specified as a predetermined region at a position capable of facing the adhesive adhering surface 223.

[0186] In the bag 10, the position where the peeling enabling portion 221 is provided is a position where the exposure to the outside of the main body 20 is avoided. By providing the peeling enabling portion 221 at such a position, even when the opening portion 24 of the bag 10 is closed using the small piece portion 220, it is possible to prevent the peeling enabling portion 221 from being exposed to the outside of the bag 10 and to improve an appearance of the bag 10. Note that, the position where the exposure to the outside of the main body 20 is avoided also includes, in a case where a separate member (a member different from the main body 20) such as a backing material 251 to be described later is provided on the inner surface side of the main body 20 in the bag 10, a position defined in the region of the surface of the separate member such as the backing material 251. For example, at least a part of at least one peeling enabling portion 221 may be disposed at the position of the backing material 251 as illustrated in Fig. 62C. Note that Fig. 62C also serves as a diagram illustrating another example of a bag 10 according to Modification 5 of the eleventh embodiment to be described later.

[0187] The peeling enabling portion 221 has a peeling layer 228. Examples of the material of the peeling layer 228 include silicone resin and the like. Note that, it is preferable that a filling layer that suppresses permeation of a compound for forming the peeling layer 228 is provided between the peeling layer 228 and a member located on the rear surface side of the peeling layer 228 (a member forming the wall surface portion 25). Then, it is preferable that the surface of the peeling layer 228 forms the small piece portion opposing surface 224.(Restriction of opening of opening portion by small piece portion and peeling enabling portion)

[0188] In the bag 10, as illustrated in Figs. 55A to 55C, it is possible to form a structure in which the expansion of the opening portion 24 is restricted by the small piece portion 220 in a state where the small piece portion 220 is peeled off from the peeling enabling portion 221. In other words, the bag 10 is configured so that, in a state where at least a part of the small piece portion 220 is peeled off from the peeling enabling portion 221 and bent, the small piece portion 220 can be adhered to the peripheral wall portion 21 in the region of the adhesive adhering surface 223 so as to prevent the movement that separates the first wall surface portion 25A and the second wall surface portion 25B from each other. Figs. 55A to 55C are diagrams for describing a step of forming a structure in which the expansion of the opening portion 24 is restricted by the small piece portion 220.

[0189] The structure in which the expansion of the opening portion 24 is restricted by the small piece portion 220 can be formed as follows. The bag 10 is changed from a state where the small piece portion 220 as illustrated in Fig. 54D is adhered to the peeling enabling portion 221 to a state where the small piece portion 220 is peeled off from the peeling enabling portion 221 as illustrated in Figs. 55A and 55B. In Figs. 55A and 55B, the small piece portion 220 is positioned directly above the wall surface portion 25, but this is merely an example.

[0190] Furthermore, the small piece portion 220 is bent (the portion of the small piece portion 220 is folded back) so that the adhesive adhering surface 223 faces the outer surface of the wall surface portion 25 (the second wall surface portion 25B in Fig. 55C) facing the wall surface portion 25 (the first wall surface portion 25A in Fig. 55C) connected to the small piece portion 220. Then, the adhesive adhering surface 223 of the small piece portion 220 is adhered to the wall surface portion 25. At this time, the movement that separates the first wall surface portion 25A and the second wall surface portion 25B, which are the wall surface portions 25, is hindered (that is, the movement that separates the upper end of the first wall surface portion 25A and the upper end of the second wall surface portion 25B from each other is restricted). Here, the restriction of the movement that separates the upper end of the first wall surface portion 25A and the upper end of the second wall surface portion 25B indicates that the expansion of the opening portion 24 is restricted.[11-2 Actions and Effects]

[0191] In the conventional bag bodies, in order to prevent unintended expansion of opening of the opening portion 24, a separate seal material is prepared and attached to the peripheral wall portion 21, thereby closing the opening portion 24. However, it is necessary to perform work of preparing a separate seal material, stock management of the separately prepared seal material, and the like, and thus, there is a problem that workability is deteriorated.

[0192] According to the bag 10 according to the eleventh embodiment, since the small piece portion 220 having the adhesive adhering surface 223 is provided in the main body 20 in advance, it is possible to eliminate a need of preparing a separate seal material and inventory management of the seal material. Further, the adhesive adhering surface 223 of the small piece portion 220 is not only temporarily fixed (removably adhered) by the peeling enabling portion 221, but also the peeling enabling portion 221 is prevented from being exposed to the outside of the bag 10, so that it is possible to suppress deterioration of the good appearance due to unintentional exposure of the peeling enabling portion 221.[11-3 Modifications](Modification 1)

[0193] In the bag 10 according to the eleventh embodiment, as illustrated in Fig. 56A, an adhesive element piece 230 formed separately from the peripheral wall portion 21 is adhered to the peripheral wall portion 21, and a part of the adhesive element piece 230 may form the small piece portion 220. This configuration is referred to as Modification 1 of the eleventh embodiment. Fig. 56A is a cross-sectional view for describing a main part of the bag 10 according to Modification 1 of the eleventh embodiment. Fig. 56A illustrates a cross-sectional view of the bag according to Modification 1 of the eleventh embodiment, which corresponds to the cross-sectional view of Fig. 55A. Note that, for convenience of description, Fig. 56A illustrates a state where the adhesive adhering surface 223 and the small piece portion opposing surface 224 are separated from each other. In an unused state, it is preferable that the adhesive adhering surface 223 and the small piece portion opposing surface 224 are adhered to each other.

[0194] In the adhesive element piece 230, a predetermined portion on one end side is adhered to the wall surface portion 25 (the first wall surface portion 25A in the example of Fig. 56A), and a portion on the other end side that is in a state of not being adhered to the wall surface portion 25 and extends from the wall surface portion 25 forms the small piece portion 220. A portion of the adhesive element piece 230 different from the small piece portion 220 is referred to as a fixed portion 240. Among the surfaces of the adhesive element piece 230, an adhesive surface between the fixed portion 240 of the adhesive element piece 230 and the wall surface portion 25 is the same surface as the surface on which the adhesive adhering surface 223 is formed. Note that, the "state of not being adhered to the wall surface portion 25" described herein indicates a state where the adhesive adhering surface 223 of the small piece portion 220 is not adhered to the outer surface side of a specific wall surface portion 25. The specific wall surface portion 25 indicates the wall surface portion 25 facing the wall surface portion 25 to which the adhesive element piece 230 is adhered at a predetermined portion on one end side. The specific wall surface portion 25 is the second wall surface portion 25B in the example of Fig. 56A. In the example of Fig. 56, the adhesive element piece 230 has an adhesive layer 222 on at least one surface of a base material sheet 231 for the element piece, and a portion where the layer 222 is formed is the small piece portion 220. Further, the adhesive element piece 230 is adhered to the wall surface portion 25 in a predetermined region defined from a portion excluding the small piece portion 220 and in a region defined on the same surface side as the formation surface of the layer 222 among the surfaces of the base material sheet 231 for the element piece. Note that, in the adhesive element piece 230, it is preferable that the upper end of the portion adhered to the wall surface portion 25 also serves as the fixed end 226 of the small piece portion 220.

[0195] The adhesive element piece 230 is adhered to a surface of the wall surface portion 25 that is opposite to the surface on which the peeling enabling portion 221 is formed. Then, when the bag 10 is not used (before a state where the expansion of the opening portion 24 is restricted is formed), the adhesive element piece 230 is bent so that the adhesive adhering surface 223 of the small piece portion 220 of the adhesive element piece 230 faces the small piece portion opposing surface 224 of the peeling enabling portion 221. Moreover, the adhesive element piece 230 is removably adhered to the small piece portion opposing surface 224 with the adhesive adhering surface 223.(Formation of state where expansion of opening portion 24 is restricted)

[0196] In Modification 1 of the eleventh embodiment, the small piece portion 220 of the adhesive element piece 230 is folded so that the adhesive adhering surface 223 faces the outer surface of the wall surface portion 25 (the second wall surface portion 25B in Fig. 56A) facing the wall surface portion 25 (the first wall surface portion 25A in Fig. 56A) connected to the small piece portion 220. Then, the adhesive adhering surface 223 of the small piece portion 220 is adhered to the wall surface portion 25. At this time, since the movement that separates the first wall surface portion 25A and the second wall surface portion 25B, which are the wall surface portions 25, is hindered, a state where the expansion of the opening portion 24 is restricted is formed.(Modification 2)

[0197] In the bag 10 according to the eleventh embodiment, as illustrated in Fig. 56B, the peeling enabling portion 221 may be formed of a release paper 235 formed separately from the peripheral wall portion 21. This configuration is referred to as Modification 1 of the eleventh embodiment. Fig. 56B is a cross-sectional view for describing a main part of the bag 10 according to Modification 1 of the eleventh embodiment. Fig. 56B illustrates a cross-sectional view of the bag according to Modification 1 of the eleventh embodiment, which corresponds to the cross-sectional view of Fig. 55B. Note that, for convenience of description, Fig. 56B illustrates a state where the adhesive adhering surface 223 and the small piece portion opposing surface 224 are separated from each other. In the bag 10, it is preferable that the adhesive adhering surface 223 and the small piece portion opposing surface 224 are adhered to each other in an unused state.

[0198] The release paper 235 has a structure in which a peeling layer 228 is formed on at least one surface of a base paper 236. The peeling layer 228 forms the small piece portion opposing surface 224. The peeling enabling portion 221 illustrated in Fig. 56B is formed by adhering the release paper 235 to the peripheral wall portion 21 in a state where a surface of the base paper 236 opposite to the formation surface of the peeling layer 228 faces the peripheral wall portion 21. However, this does not mean that the portion to which the release paper 235 is adhered is limited to the peripheral wall portion 21. For example, in a case where a handle member is provided on the bag 10 as described later, the release paper 235 may be adhered to a backing material for fixing the handle member to the bag 10.(Modification 3)

[0199] In the bag according to Modification 2 of the eleventh embodiment, as illustrated in Figs. 57A to 57D, an adhesive element piece 230 formed separately from the peripheral wall portion 21 is adhered to the peripheral wall portion 21, a part of the adhesive element piece 230 forms the small piece portion 220, and the release paper 235 may be adhered to the adhesive element piece 230 on the surface opposite to the small piece portion opposing surface 224. This configuration is referred to as Modification 3 of the eleventh embodiment. Figs. 57A to 57D are diagrams for describing a main part of the bag 10 according to Modification 1 of the eleventh embodiment.

[0200] Similarly to Modification 1, in the adhesive element piece 230, a predetermined portion on one end side is adhered to the wall surface portion 25 (the first wall surface portion 25A in the example of Fig. 56A), and a portion on the other end side that is not adhered to the wall surface portion 25 and extends from the wall surface portion 25 forms the small piece portion 220. However, among the surfaces of the adhesive element piece 230, an adhesive surface between the fixed portion of the adhesive element piece 230 and the wall surface portion 25 is a surface different from the surface on which the adhesive adhering surface 223 is formed.

[0201] Similarly to Modification 2, the release paper 235 has a structure in which a peeling layer 228 is formed on at least one surface of a base paper 236. However, in the release paper 235, a surface opposite to the small piece portion opposing surface 224, which is the formation surface of the peeling layer 228, is adhered to the adhesive element piece 230. At this time, the release paper 235 is adhered to the surface of the adhesive element piece 230 on which the adhesive adhering surface 223 is formed. At least a part of the release paper 235 is in a state of being adhered to the bag 10 via the adhesive element piece 230, so that the release paper 235 forms the peeling enabling portion 221.

[0202] At a stage before a state where the expansion of the opening portion 24 is restricted is formed when the bag 10 is not used, the adhesive element piece 230 is bent so that the adhesive adhering surface 223 of the small piece portion 220 of the adhesive element piece 230 faces the small piece portion opposing surface 224 of the peeling enabling portion 221, similarly to Modification 1 and the like. Moreover, the adhesive element piece 230 is removably adhered to the small piece portion opposing surface 224 with the adhesive adhering surface 223.(Formation of state where expansion of opening portion 24 is restricted)

[0203] In the bag 10 according to Modification 3 of the eleventh embodiment, as illustrated in Figs. 58A to 58C, it is possible to form a structure in which the expansion of the opening portion 24 is restricted by the small piece portion 220 in a state where the small piece portion 220 is peeled off from the peeling enabling portion 221.

[0204] In Modification 3 of the eleventh embodiment, as illustrated in Fig. 58C and the like, the small piece portion 220 of the adhesive element piece 230 is folded so that the adhesive adhering surface 223 faces the outer surface of the wall surface portion 25 (the second wall surface portion 25B in Fig. 56C) facing the wall surface portion 25 (the first wall surface portion 25A in Fig. 58C) connected to the small piece portion 220. Then, the adhesive adhering surface 223 of the small piece portion 220 is adhered to the wall surface portion 25. At this time, since the movement that separates the first wall surface portion 25A and the second wall surface portion 25B, which are the wall surface portions 25, is hindered, a state where the expansion of the opening portion 24 is restricted is formed.(Modification 4)

[0205] In the bag according to Modification 2 of the eleventh embodiment, as illustrated in Figs. 59A to 59D, an adhesive element piece 230 formed separately from the peripheral wall portion 21 is adhered to the peripheral wall portion 21, a part of the adhesive element piece 230 forms the small piece portion 220, the adhesive element piece may be adhered to the outer surface side of the peripheral wall portion, and the release paper may be adhered to the inner surface side of the peripheral wall portion. This configuration is referred to as Modification 4 of the eleventh embodiment. Figs. 59A to 59D are diagrams for describing a main part of the bag 10 according to Modification 4 of the eleventh embodiment.

[0206] In the bag 10 according to Modification 4 of the eleventh embodiment, a small piece portion 220 has the same structure as the small piece portion 220 illustrated in Modification 1, and a peeling enabling portion 221 has the same structure as the peeling enabling portion 221 illustrated in the modification 2, so that detailed descriptions thereof will be omitted.

[0207] In the bag 10 according to Modification 4 of the eleventh embodiment, when the bag 10 is not used (before a state where the expansion of the opening portion 24 is restricted is formed), similarly to Modification 1, Modification 2, and the like, the adhesive element piece 230 is bent so that the adhesive adhering surface 223 of the small piece portion 220 of the adhesive element piece 230 faces the small piece portion opposing surface 224 of the peeling enabling portion 221, and the adhesive adhering surface 223 is removably adhered to the adhesive adhering surface 223.(Formation of state where expansion of opening portion 24 is restricted)

[0208] In the bag 10 according to Modification 4 of the eleventh embodiment, as illustrated in Figs. 60A to 60C, it is possible to form a structure in which the expansion of the opening portion 24 is restricted by the small piece portion 220 in a state where the small piece portion 220 is peeled off from the peeling enabling portion 221.

[0209] In Modification 4 of the eleventh embodiment, as illustrated in Fig. 60C and the like, the small piece portion 220 of the adhesive element piece 230 is folded so that the adhesive adhering surface 223 faces the outer surface of the wall surface portion 25 (the second wall surface portion 25B in Fig. 60C) facing the wall surface portion 25 (the first wall surface portion 25A in Fig. 60C) connected to the small piece portion 220. Then, the adhesive adhering surface 223 of the small piece portion 220 is adhered to the wall surface portion 25. At this time, since the movement that separates the first wall surface portion 25A and the second wall surface portion 25B, which are the wall surface portions 25, is hindered, a state where the expansion of the opening portion 24 is restricted is formed.(Modification 5)

[0210] In the bag 10 according to the eleventh embodiment, as illustrated in Figs. 61A and 61B, a handle member 250 may be provided. This configuration is referred to as Modification 5 of the eleventh embodiment. Figs. 61A and 61B are diagrams for describing an example of Modification 5 of the eleventh embodiment. In the example of Fig. 61, the handle member 250 is fixed to the inner surface side of the bag 10 (the inner surface side of the main body 20) slightly below the upper end side of the main body 20 by attaching a backing material 251 for fixing the handle member 250 to the bag 10 with an adhesive or the like. However, this does not prohibit the handle member 250 from being fixed to the outer surface side of the main body 20. The lower end side of the handle member 250 is located slightly below the upper end of the main body 20, a part of the handle member 250 is located above the upper end of the main body 20, and a portion of the handle member 250 located above the upper end of the main body 20 can function as a gripping portion that can be gripped by the user. The shape of the handle member 250 is not particularly limited, and the handle member 250 is formed into a U-shape as a whole in the examples of Figs. 61A and 61B, but this is merely an example. In Modification 5 of the eleventh embodiment, in the examples of Figs. 61A and 61B, the release paper 235 may be adhered to the bag 10 at a position avoiding the backing material 251, so that the peeling enabling portion 221 is formed at the position avoiding the backing material 251. However, as illustrated in Fig. 61C, for at least a part of the release paper 235, at least a part of the release paper 235 may be adhered to the backing material 251, so that at least a part of the peeling enabling portion 221 may be formed in a region overlapping the backing material 251. Note that, the fact that at least a part of the peeling enabling portion 221 may be formed in a region overlapping the backing material 251 also applies to a case where the peeling enabling portion 221 is not formed of the release paper 235, but a peeling layer 228 is formed on the inner surface of the main body 20.(Modification 6)

[0211] In the bag according to the eleventh embodiment, as illustrated in Figs. 62A and 62B, a tab 241 configured to be capable of being pinched may extend on the side of the free end 227 of the small piece portion 220. This configuration is referred to as Modification 6 of the eleventh embodiment. Figs. 62A and 62B are diagrams for describing a main part of the bag 10 according to Modification 6 of the eleventh embodiment. The size and shape of the tab 241 extending on the side of the free end 227 of the small piece portion 220 are not particularly limited, but it is preferable that the tab has a size and shape that allow the user to pinch it with fingers. Further, it is preferable that the formation of the adhesive adhering surface 223 is avoided on the tab 241. In the bag according to the eleventh embodiment, since the tab 241 is provided, a possibility that the user touches the adhesive adhering surface 223 can be suppressed, and the adhesive adhering surface 223 of the small piece portion 220 can be adhered to the wall surface portion 25 so as to form a state where the expansion of the opening portion of the bag 10 is restricted.

[0212] Note that, in the bag 10 according to Modification 6 of the eleventh embodiment, as illustrated in Figs. 63A and 63B, a portion on the side of the free end 227 of the small piece portion 220 (a portion corresponding to the tab 241) may be folded back upward at the base end of the tab 241. In Figs. 63A and 63B, reference numeral 242 denotes a folded-back portion formed by folding back the tab 241 upward. Then, in a case where the folded-back portion 242 is formed and the tip of the tab 241 is directed upward, as illustrated in Figs. 63A and 63B, it is preferable that at least a part of the tab 241 is located above the upper end 225 of the peripheral wall portion 21 of the main body 20. With such a configuration, it becomes easier to recognize the tab 241 from the outside of the bag 10. Note that Figs. 63A and 63B are diagrams for describing a main part of the bag 10 according to Modification 6 of the eleventh embodiment. Note that Modification 6 of the eleventh embodiment may be applied to the bag 10 according to any one of Modifications 1 to 5 of the eleventh embodiment. For example, Fig. 63C illustrates an example of a case where the configuration of Modification 6 of the eleventh embodiment is applied to the bag 10 according to Modification 3 of the eleventh embodiment. Note that Fig. 63C illustrates an example of a case where the tip of the tab 241 is directed upward (an example of a case where the folded-back portion 242 is formed).[11-4 Reference Example]

[0213] In the bag 10 according to the eleventh embodiment, the above-described small piece portion 220 and the peeling enabling portion 221 may be provided in a bag in which the position restricting member 30 is omitted from each of the bag bodies 10 of the first to sixth embodiments (that is, a bag 10 constituted only by the main body 20 as illustrated in Fig. 31) (reference example).

[0214] A bag 10 according to the reference example of the eleventh embodiment includes a bottom portion 22 and a peripheral wall portion 21 connected to the bottom portion 22 at the peripheral edge of the bottom portion 22, and has a main body 20 forming a space portion 23 surrounded by the bottom portion 22 and the peripheral wall portion 21 and capable of storing contents and an opening portion 24 through which the contents are inserted into the space portion 23. Further, the peripheral wall portion 21 includes a first wall surface portion 25A and a second wall surface portion 25B as a pair of wall surface portions 25 facing each other. Then, the peripheral wall portion 21 has a small piece portion 220 having an adhesive adhering surface 223 on which an adhesive material is disposed, and the small piece portion 220 has a fixed end 226 fixed to the peripheral wall portion 21 and a free end 227 displaceable relative to the peripheral wall portion 21. Furthermore, a peeling enabling portion 221 is provided that is capable of rotating the free end 226 of the small piece portion 220 around at least the fixed end 226 as an axis, has a small piece portion opposing surface 224 at a position capable of facing the adhesive adhering surface 223, and can be removably adhered to the small piece portion 220 with the small piece portion opposing surface 224. In the bag 10 according to the reference example of the eleventh embodiment, the position where the peeling enabling portion 221 is provided is a position where the exposure to the outside of the main body 20 is avoided. Then, the small piece portion 220 can be adhered to the peripheral wall portion 21 in the region of the adhesive adhering surface 223 so as to prevent the movement that separates the first wall surface portion 25A and the second wall surface portion 25B from each other, in a state where at least a part of the small piece portion 220 is peeled off from the peeling enabling portion 221 and bent.

[0215] In the case of the reference example, as illustrated in Fig. 32, an adhesive disposing portion 179 for closing the opening portion 24 may be provided. The adhesive disposing portion 179 for closing the opening portion 24 is provided on the upper end side of the peripheral wall portion 21 and on the side of the inner surface 21A of the peripheral wall portion 21. The adhesive disposing portion 179 can be exemplified by a double-sided adhesive tape or the like.[12 Twelfth Embodiment]

[0216] A bag 10 according to the twelfth embodiment may be provided with an inner surface bonding piece 253 and a peeling enabling portion 254 in the bag 10 of any one of the first to tenth embodiments, as illustrated in the examples of Figs. 65A and 65B. Figs. 65A to 65B are diagrams for describing an example of the twelfth embodiment.

[0217] The bag 10 according to the twelfth embodiment includes a main body 20. The main body 20 has a bottom portion 22 and a peripheral wall portion 21 connected to the bottom portion 22 at the peripheral edge of the bottom portion 22. The peripheral wall portion 21 includes a first wall surface portion 25A and a second wall surface portion 25B as a pair of wall surface portions 25 facing each other. The main body 20 forms a space portion 23 surrounded by the bottom portion 22 and the peripheral wall portion 21 and capable of storing contents, and an opening portion 24 through which the contents are inserted into the space portion 23. In the examples of Figs. 65A to 65B, an example of a case where the peripheral wall portion 21 has a pair of wall surface portions 25 facing each other and the inner surface bonding piece 253 and the peeling enabling portion 254 are provided is illustrated.

[0218] In the peripheral wall portion 21 illustrated in the example of Fig. 65, the pair of wall surface portions 25 facing each other are referred to as the first wall surface portion 25A and the second wall surface portion 25B for convenience. In other words, the first wall surface portion 25A and the second wall surface portion 25B are merely specified for convenience of description, and the terms of the first wall surface portion 25A and the second wall surface portion 25B may be interchanged.

[0219] The peeling enabling portion 254 is similar to the peeling enabling portion 221 described in the description of the eleventh embodiment, and thus a detailed description thereof will be omitted. In the example of Fig. 65, as described in the description of Modification 2 of the eleventh embodiment, the peeling enabling portion 221 may be formed of a release paper 235 formed separately from the peripheral wall portion 21. The release paper 235 has a structure in which a peeling layer 228 is formed on at least one surface of a base paper 236. In the peeling enabling portion 254, a surface facing the adhesive adhering surface 223 among surfaces of the peeling enabling portion 254 is referred to as an opposing surface 255.(Inner surface bonding piece)

[0220] In the bag 10 according to the twelfth embodiment, an inner surface bonding piece 253 is attached to the peripheral wall portion 21. The inner surface bonding piece 253 may be configured in the same manner as the adhesive element piece 230 described in the description of the eleventh embodiment except that the inner surface bonding piece is bonded to the inner surface side of the peripheral wall portion 21 and is disposed at a position below the upper end of the peripheral wall portion 21 (a position below the respective upper ends, regardless of whether the upper end of the first wall surface portion 25A or the upper end of the second wall surface portion 25B is used as a reference) regardless of opening / closing of the opening portion 24. Therefore, the description of the configuration of the inner surface bonding piece 253 will be continued using the reference numerals and names used in the configuration of the adhesive element piece 230. The example of Fig. 65 illustrates a case where a member having a structure having an adhesive layer 222 on at least one surface of a base material sheet 231 for the element piece is used as the inner surface bonding piece 253, similarly to the adhesive element piece 230.

[0221] Therefore, the inner surface bonding piece 253 has an adhesive adhering surface 223 on which an adhesive material is disposed. Then, as illustrated in Figs. 66A to 66D, a portion of the inner surface bonding piece 253 where the adhesive adhering surface 223 is formed is formed in a "region that can face the inner surface of the second wall surface portion 25B", in a case where the portion is rotated around a fixed end 253A of the inner surface bonding piece 253 as an axis. The fixed end 253A is formed at a substantially end edge of a bonding region between the inner surface bonding piece 253 and the first wall surface portion 25A, and at an end edge adjacent to a formation region of the adhesive adhering surface 223. Figs. 66A to 66D are diagrams for describing the movement of the inner surface bonding piece 253 in a case where the expansion of the opening portion 24 of the bag 10 is restricted using the inner surface bonding piece 253.

[0222] In the bag 10 according to the twelfth embodiment, as illustrated in Fig. 65A, an inner surface bonding piece 253 formed separately from the peripheral wall portion 21 is adhered to the peripheral wall portion 21, and the adhesive adhering surface 223 is brought into contact with the opposing surface 255, when not in use. During use, as illustrated in Figs. 66A to 66D, a state where the adhesive adhering surface 223 and the opposing surface 255 are separated from each other is formed, and the adhesive adhering surface 223 is adhered to the inner surface of the second wall surface portion 25B. As a result, the expansion of the opening portion 24 is restricted.

[0223] Further, in the inner surface bonding piece 253, it is preferable that a predetermined interval is provided between the fixed end 253A and the formation region of the adhesive adhering surface 223. At this time, the interval between the fixed end 253A and the formation region of the adhesive adhering surface 223 is preferably larger than the thickness of the inner surface bonding piece 253. With such a size, after the adhesive adhering surface 223 is adhered to the inner surface of the second wall surface portion 25B, it is possible to allow deformation in which the second wall surface portion 25B and the first wall surface portion 25A are slightly shifted in the lateral direction near the opening portion 24 of the bag 10, and it becomes possible to expect correction of positional deviation between the second wall surface portion 25B and the first wall surface portion 25A.[12-2 Reference Example]

[0224] In the bag 10 according to the twelfth embodiment, the above-described inner surface bonding piece 253 and the peeling enabling portion 254 may be provided in a bag in which the position restricting member 30 is omitted from each of the bag bodies of the first to tenth embodiments (that is, a bag constituted only by the main body as illustrated in Fig. 31) (reference example).[13 Thirteenth Embodiment][13-1 Configuration]

[0225] In a bag 10 according to the thirteenth embodiment, as illustrated in the examples of Figs. 67A and 67B, in the bag 10 of any one of the first to twelfth embodiments, the main body 20 is constituted by a folded structure 260, and the folded structure 260 is provided with a side end adhesive portion 261 so as to satisfy specific conditions. Figs. 67A to 67B are diagrams for describing an example of the thirteenth embodiment.

[0226] The bag according to the thirteenth embodiment includes a main body 20. The main body 20 has a bottom portion 22 and a peripheral wall portion 21 connected to the bottom portion 22 at the peripheral edge of the bottom portion 22. The peripheral wall portion 21 has a pair of wall surface portions 25 facing each other and a pair of side wall surface portions 26 facing each other. In the peripheral wall portion, each wall surface portion 25 is connected to the side wall surface portion 26 at the side end edge of the wall surface portion 25. In the example of Fig. 67A, the peripheral wall portion 21 includes a first wall surface portion 25A and a second wall surface portion 25B as a pair of wall surface portions 25 facing each other. The main body 20 forms a space portion 23 surrounded by the bottom portion 22 and the peripheral wall portion 21 and capable of storing contents, and an opening portion 24 through which the contents are inserted into the space portion 23. In the examples of Figs. 67A to 67B, an example of a case where the peripheral wall portion 21 has a pair of wall surface portions 25 facing each other is illustrated.

[0227] In the peripheral wall portion 21 illustrated in the example of Fig. 67, the pair of wall surface portions 25 facing each other are referred to as the first wall surface portion 25A and the second wall surface portion 25B for convenience. In other words, the first wall surface portion 25A and the second wall surface portion 25B are merely specified for convenience of description, and the terms of the first wall surface portion 25A and the second wall surface portion 25B may be interchanged.

[0228] The main body 20 has at least one corner portion 28 extending from the bottom portion 22 toward the opening portion 24 on the inner surface of the peripheral wall portion 21. In the example of the main body 20 illustrated in Fig. 67A, there are four boundary positions between the wall surface portion 25 and the side wall surface portion 26, and corner portions 28 are formed at the respective boundary positions.

[0229] Further, in the example of Fig. 67, a position restricting member 30 is bonded to a predetermined position of the peripheral wall portion 21 of the main body 20. Since the main body 20 is constituted by the folded structure 260, the position restricting member 30 is bonded to the inner surface side of the folded structure 260.(Folded structure)

[0230] The folded structure 260 constituting the main body 20 is a structure having a structure in which a blank material 500 is folded, and is defined as a structure in which structures corresponding to the peripheral wall portion 21 and the bottom portion 22 are formed. Here, as illustrated in Fig. 67C, the blank material 500 can be defined as a sheet material formed into a shape corresponding to the main body 20. Further, the blank material 500 is formed from a paper-based material. Fig. 67C is a plan view for describing an example of the blank material 500 forming the folded structure 260, that is, the blank material 500 forming the main body 20. As the paper-based material constituting the blank material 500, a paper-based material applicable as the material of the main body 20 may be applied. The material of the main body 20 is the same as the material of the main body 20 described in the first embodiment, and thus a detailed description thereof will be omitted.(Side end adhesive portion)

[0231] The folded structure 260 includes a side end adhesive portion 261 that adheres a first overlapping structure corresponding portion 560A and a second overlapping structure corresponding portion 560B to each other, as described later. The side end adhesive portion 261 can be formed in the same manner as the blank material adhesive portion 551 and the like described in the first embodiment, and is formed by adhering the overlapping structure corresponding portions to each other with an adhesive or the like. Further, as illustrated in Fig. 67A, in the folded structure 260, the first overlapping structure corresponding portion 560A and the second overlapping structure corresponding portion 560B are positioned in order from the inner surface side of the folded structure 260, and the surface on the inner surface side of the first overlapping structure corresponding portion 560A is exposed to the side of a "space inside the folded structure 260" to be the space portion 23 of the main body 20. The layout of the side end adhesive portions 261 is not particularly limited, and may be formed in a stripe pattern as illustrated in Fig. 68B, may be formed in a lattice pattern, or may be formed in a dot pattern, or may be configured such that the adhered surface spreads over the entire surface (a full-surface formation type) as illustrated in Fig. 68A.(Blank material)

[0232] The blank material 500 illustrated in the example of Fig. 67C has a blank material upper edge portion 563, a blank material lower edge portion 564, and a pair of blank material side end portions 565 (lateral side end edge portions) as an outer peripheral edge portion 562, in a case where the thickness direction of the blank material 500 is set to the line-of-sight direction. In the blank material 500, a portion corresponding to the peripheral wall portion 21 (peripheral wall portion corresponding portion 502) and a portion corresponding to the bottom portion 22 (bottom portion corresponding portion 501) are defined.

[0233] The blank material upper edge portion 563 is a portion of the outer peripheral edge portion 562 that forms the opening portion 24, in a case where the main body 20 is formed by the folded structure 260. The blank material lower edge portion 564 is a portion of the outer peripheral edge portion 562 formed on the end side opposite to the blank material upper edge portion 563. The blank material lower edge portion 564 will be located at the bottom portion 22 in a case where the main body 20 is formed by the folded structure 260. The pair of blank material side end portions 565 are portions of the outer peripheral edge portion 562 connected to the blank material upper edge portion 563 and the blank material lower edge portion 564, and the pair of blank material side end portions 565 are located on opposite end sides to each other (spaced apart in the longitudinal direction of the blank material 500 in Fig. 66C). The blank material 500 has a first blank material side end portion 565A and a second blank material side end portion 565B as the pair of blank material side end portions 565.

[0234] The blank material 500 has an overlapping structure corresponding portion 560. In a case where the folded structure 260 is formed from the blank material 500, the overlapping structure corresponding portion 560 is defined as a portion for bonding a predetermined portion inward from the first blank material side end portion 565A and a predetermined portion inward from the second blank material side end portion 565B to each other. As the overlapping structure corresponding portion 560, a first overlapping structure corresponding portion 560A and a second overlapping structure corresponding portion 560B are formed. In the blank material 500 illustrated in Fig. 67C, the first overlapping structure corresponding portion 560A is defined by a predetermined portion on the side of the first blank material side end portion 565A, and the second overlapping structure corresponding portion 560B is defined by a predetermined portion on the side of the second blank material side end portion 565B.

[0235] On the surface of the blank material 500, a first inward region 566A and a second inward region 566B are defined. The first inward region 566A is defined as a region directed to the inside of the folded structure 260 (the side of the space portion 23 in the main body 20) in the region of the first overlapping structure corresponding portion 560A (the region of the surface of the first overlapping structure corresponding portion 560A). The second inward region 566B is defined as a region directed to the inside of the folded structure 260 (the side of the space portion 23 in the main body 20) in the region of the second overlapping structure corresponding portion 560B (the region of the surface of the second overlapping structure corresponding portion 560B).

[0236] As illustrated in Figs. 67C, 68A, and the like, an intended facing region IVR exists at a predetermined position on the blank material 500. The intended facing region IVR is defined as a region where the position restricting member 30 is intended to face (be disposed) in the blank material 500.

[0237] In the blank material 500, at least one intended facing region IVR is defined so as to satisfy all of the following three conditions A, B, and C.

[0238] Condition A: The intended facing region IVR is defined in a region avoiding the second inward region 566B.

[0239] Condition B: The intended facing region IVR is a region crossing a corner portion corresponding bending position 567.

[0240] Condition C: One side end edge EGP of the two side end edges EGP of the intended facing region IVR is located in the first inward region 566A.

[0241] In the example of Fig. 67C, the intended facing region IVR satisfies three conditions A, B, and C.(Step of forming folded structure from blank material)

[0242] The folded structure 260 can be formed, for example, by performing a step of folding the blank material 500 and a step of adhering the blank material at a predetermined portion as described below. In the example illustrated in Fig. 67C, the blank material 500 is constituted by a rectangular sheet. The position restricting member 30 is adhered to the intended facing region IVR of the blank material 500. In Fig. 67, the position restricting member 30 is constituted by a belt-like (belt-shaped) sheet, and the position restricting member 30 is adhered to the blank material 500 at both end portions in the longitudinal direction. A step of folding the blank material 500 is performed using the blank material 500 to which the position restricting member 30 is adhered.

[0243] In the blank material 500, a position where the blank material 500 is folded at a portion corresponding to the corner portion 28 is defined as a corner portion corresponding bending position 567, and in the step of folding the blank material 500, the blank material 500 is folded at the corner portion corresponding bending position 567. Note that, in the example of Fig. 66, the corner portion corresponding bending position 567 is a portion specified by a position PU1. Note that, a position PU2 illustrated in Fig. 67C is a position to be a fold line that becomes a folded portion for forming a gusset structure (a gusset capable of constituting a main body gusset portion 29), in a case where the folded structure 260 is viewed from the outer surface side in the state of the folded structure 260.

[0244] Further, the first overlapping structure corresponding portion 560A and the second overlapping structure corresponding portion 560B of the blank material 500 are overlapped with each other. At this time, the first overlapping structure corresponding portion 560A is disposed to face the second inward region 566B of the second overlapping structure corresponding portion 560B, and the first inward region 566A of the first overlapping structure corresponding portion 560A is in an exposed state.

[0245] In the step of adhering the blank material 500, the first overlapping structure corresponding portion 560A and the second overlapping structure corresponding portion 560B of the blank material 500 are adhered to each other to form the side end adhesive portion 261. At this time, the blank material 500 becomes a cylindrical structure 530. Note that, in the cylindrical structure 530, the position restricting member 30 is adhered onto the first inward region 566A of the first overlapping structure corresponding portion 560A.

[0246] A portion of the cylindrical structure 530 corresponding to the bottom portion 22 (bottom portion corresponding portion 501) is folded inward. In the examples of Figs. 67C, 68A, and the like, the bottom portion corresponding portion 501 has a first lower portion and a second lower portion. The first lower portion is defined as a portion (portion 501A) of the bottom portion corresponding portion 501 that extends below the portion corresponding to the side wall surface portion. There is a pair (two) of first lower portions (portions 501A). The second lower portion is defined as a portion (portion 501B) of the bottom portion corresponding portion 501 that extends below the portion corresponding to the wall surface portion. There is a pair (two) of second lower portions (portions 501A). In the blank material 500, the first lower portion and the second lower portion are disposed to be alternately arranged.

[0247] In the cylindrical structure 530, the first lower portion (portion 501A) is folded in the inward direction (toward the center of the cylindrical structure (the direction of the arrow F2)), and the second lower portion (portion 501B) is also folded in the inward direction (toward the center of the cylindrical structure (the direction of the arrow F2)). At this time, a portion where the portion 501A and the portion 501B overlap each other and a portion where the two portions 501B overlap each other are adhered with an adhesive or the like. In this case, the folding structure 27 is formed at the bottom portion 22. Further, a reinforcing sheet material or the like may be further attached to the bottom portion 22. As a result, the folded structure 260 is formed.[13-2 Actions and Effects]

[0248] In the conventional bag bodies, the side end adhesive portion was formed at or near the corner portion. In this case, there was a problem that it is difficult to dispose the position restricting member at the corner portion where the side end adhesive portion is formed.

[0249] According to the bag according to the thirteenth embodiment, by defining the position of the side end adhesive portion on the blank material 500 and the position where the position restricting member 30 is disposed at specific positions, and by making the position of the side end adhesive portion and the position of the position restricting member 30 different from each other, the side end adhesive portion can be formed, and the position of the position restricting member 30 can be disposed at the position of the corner portion 28.[13-3 Modifications](Modification 1)

[0250] In the bag 10 according to the thirteenth embodiment, a specific blank material 500 as described below may be used. In other words, as the specific blank material 500, as illustrated in Figs. 68A and 68B, one in which an adhesive portion corresponding portion (A) and an adhesive portion corresponding portion (B) are defined so that at least a part of the adhesive portion corresponding portion (A) also serves as at least a part of the adhesive portion corresponding portion (B), may be used. Here, in the blank material 500, the adhesive portion corresponding portion (A) is a portion of the first overlapping structure corresponding portion 560A corresponding to the side end adhesive portion 261 (a portion indicated by reference numeral 571 in Figs. 68A to 68B (hatched portion)). The adhesive portion corresponding portion (B) is a portion corresponding to the portion where the position restricting member 30 and the folded structure 260 are bonded on the blank material 500 (a facing portion 572 to a bonding margin portion 32). Such a configuration including the adhesive portion corresponding portion (A) and the adhesive portion corresponding portion (B) is referred to as Modification 1 of the thirteenth embodiment. Figs. 68A and 68B are plan views for describing one example of a blank material 500 forming a bag 10 according to Modification 1 of the thirteenth embodiment.

[0251] According to Modification 1 of the thirteenth embodiment, in a case where a step of forming the side end adhesive portion by adhering the first overlapping structure corresponding portion and the second overlapping structure corresponding portion using heat sealing or the like is performed, heat sealing is also performed on a portion where the position restricting member and the blank material are bonded, enabling the formation of a state where the portion where the position restricting member and the blank material are bonded together is more strongly bonded.

[0252] The adhesive portion corresponding portion (A) and the adhesive portion corresponding portion (B) may completely overlap each other, or a part of the adhesive portion corresponding portion (B) may be included in the adhesive portion corresponding portion (A). The adhesive portion corresponding portion (B) may be included in the adhesive portion corresponding portion (A). Further, these do not prohibit the adhesive portion corresponding portion (B) from including the adhesive portion corresponding portion (A).

[0253] In Fig. 68B, the side end adhesive portions 261 are constituted in a stripe shape by a plurality of linear adhesive portions. In this example, in the blank material 500, the adhesive portion corresponding portion (A) is defined by a portion corresponding to the plurality of linear adhesive portions, and the adhesive portion corresponding portion (B) is defined by a part of one linear adhesive portion. Note that, as illustrated in Fig. 68C, Modification 1 of the thirteenth embodiment does not prohibit the adhesive portion corresponding portion (A) and the adhesive portion corresponding portion (B) from being separated from each other in the bag 10 according to the thirteenth embodiment.(Modification 2)

[0254] As illustrated in the examples of Figs. 69A and 69B, in the bag 10 according to the thirteenth embodiment, a handle structure 252 may be provided on the main body 20. Such a configuration is referred to as Modification 2 of the thirteenth embodiment. Fig. 69A is a plan view for describing one example of the bag 10 according to Modification 2 of the thirteenth embodiment. Fig. 69B is a plan view for describing one example of a blank material 500 for forming the bag 10 according to Modification 2 of the thirteenth embodiment.

[0255] The configuration in which the main body 20 is provided with a handle structure 252 is realized by adhering the handle structure 252 to the folded structure 260.

[0256] The handle structure 252 indicates a structure in which a handle member 250 and a backing material 251 are combined. Since the same contents as those described in Modification 5 of the eleventh embodiment can be applied to the handle member 250 and the backing material 251, detailed descriptions thereof will be omitted. In view of the appearance of the main body 20, the handle member 250 is disposed so as to be partially exposed upward from the upper end of the peripheral wall portion 21, and the backing material 251 is disposed so as to cover a portion of the handle member 250 facing the peripheral wall portion 21. The backing material 251 is adhered to the peripheral wall portion 21 and the handle member 250. The handle member 250 is also adhered to the peripheral wall portion 21 and the backing material 251.(Blank material)

[0257] As illustrated in Fig. 69C, the blank material 500 forming the bag 10 according to Modification 2 of the thirteenth embodiment has a specific region defined as a handle adhesion region 575. Fig. 69C is a plan view illustrating an example of the blank material 500 forming the bag 10 according to Modification 2 of the thirteenth embodiment. The handle adhesion region 575 indicates a region corresponding to a region to which the handle structure 252 is adhered on the blank material 500. In the blank material 500, it is preferable that the handle adhesion region 575 is defined as a region that does not cross an end ELN of the blank material side end portion 565 in the state of the folded structure 260. In the bag 10 according to Modification 2 of the thirteenth embodiment, even if the handle structure 252 is provided in each of the pair of wall surface portions 25 and the position restricting members 30 are provided in all the corner portions 28 (in a case where the bag 10 is formed in a box shape as illustrated in Fig. 69, even if the position restricting members 30 are provided at all the corner portions 28 formed at four positions), the folded structure 260 can be formed by folding the blank material 500 in a state where the position restricting member 30 and the handle structure 252 are bonded at predetermined positions on the blank material 500 in advance.

[0258] In a case where the handle adhesion region 575 is defined in this manner, the handle structure 252 is adhered to a predetermined position in the state of the blank material 500. In this case, since it is possible to eliminate the need to perform a step of positioning the handle structure 252 at a predetermined position after the folded structure 260 is formed, the manufacturing process of the bag 10 can be simplified.[14 Fourteenth Embodiment][14-1 Configuration] 0

[0259] For a bag according to the fourteenth embodiment, as illustrated in the examples of Figs. 70A, 70B, and 70C, in the bag according to any one of the first to thirteenth embodiments, the main body 20 is constituted by a folded structure 260, and the folded structure 260 is provided with an overlapping structure portion (a bottom-side overlapping structure portion 580) to be described later and a lower end folded-back portion 581 to be described later. Figs. 70A to 70C are diagrams for describing an example of the thirteenth embodiment.

[0260] The bag according to the fourteenth embodiment includes a main body 20. The main body 20 has a bottom portion 22 and a peripheral wall portion 21 connected to the bottom portion 22 at the peripheral edge of the bottom portion 22. The peripheral wall portion 21 has a pair of wall surface portions 25 facing each other and a pair of side wall surface portions 26 facing each other. In the peripheral wall portion 21, each wall surface portion 25 is connected to the side wall surface portion 26 at the side end edge of the wall surface portion 25. In the example of Fig. 70A, the peripheral wall portion 21 includes a first wall surface portion 25A and a second wall surface portion 25B as a pair of wall surface portions 25 facing each other. The main body 20 forms a space portion 23 surrounded by the bottom portion 22 and the peripheral wall portion 21 and capable of storing contents, and an opening portion 24 through which the contents are inserted into the space portion 23. In the examples of Figs. 70A to 70C, an example of a case where the peripheral wall portion 21 has a pair of wall surface portions 25 facing each other is illustrated.

[0261] In the peripheral wall portion 21 illustrated in the example of Fig. 70, the pair of wall surface portions 25 facing each other are referred to as the first wall surface portion 25A and the second wall surface portion 25B for convenience. In other words, the first wall surface portion 25A and the second wall surface portion 25B are merely specified for convenience of description, and the terms of the first wall surface portion 25A and the second wall surface portion 25B may be interchanged.

[0262] The main body 20 has at least one corner portion extending from the bottom portion toward the opening portion on the inner surface of the peripheral wall portion 21. In the example of the main body 20 illustrated in Fig. 70A, there are four boundary positions between the wall surface portion 25 and the side wall surface portion 26, and corner portions 28 are formed at the respective boundary positions.

[0263] Further, in the example of Fig. 70, a position restricting member 30 is bonded to a predetermined position of the peripheral wall portion 21 of the main body 20. Since the main body 20 is constituted by the folded structure 260, the position restricting member 30 is bonded to the inner surface side of the folded structure 260.(Folded structure)

[0264] The folded structure 260 constituting the main body 20 is a structure having a structure in which a blank material 500 is folded, and is defined as a portion where a structure corresponding to the peripheral wall portion 21 and the bottom portion 22 is formed. The blank material 500 can be defined as a sheet material formed in a shape corresponding to the main body 20. Further, the blank material 500 is formed from a paper-based material. As the paper-based material constituting the blank material 500, a paper-based material applicable as the material of the main body 20 may be applied. The material of the main body 20 is the same as the material of the main body 20 described in the first embodiment, and thus a detailed description thereof will be omitted. In the example of Fig. 70, the folded structure 260 has a side end adhesive portion 261. The side end adhesive portion 261 is a structure portion in which a pair of blank material side end portions 565 of the blank material 500 are adhered. The layout of the side end adhesive portions 261 is not particularly limited. Specifically, the side end adhesive portion 261 may be configured similarly to the side end adhesive portion described in the thirteenth embodiment.

[0265] In the bag 10 according to the fourteenth embodiment, the folded structure 260 constituting the main body 20 includes a first inward-folded portion 582 and a second inward-folded portion 583, and a bottom-side overlapping structure portion 580 as an overlapping structure portion formed in a portion corresponding to the bottom portion 22. Further, in the folded structure 260, a lower end folded-back portion 581 is formed on at least one of the pair of second inward-folded portions 583, and at least a part of the lower end folded-back portion 581 is disposed in the bottom-side overlapping structure portion 580 (located in the bottom-side overlapping structure portion 580).(First inward-folded portion)

[0266] The first inward-folded portion 582 is defined as a portion forming a structure in which a first lower portion (portion 501A) of the blank material 500 to be described later is folded inward of the folded structure 260. Two (a pair of) first lower portions of the blank material 500 are defined, and a pair of first inward-folded portions 582 are formed in the folded structure 260.(Second inward-folded portion)

[0267] The second inward-folded portion 583 is defined as a portion forming a structure in which a second lower portion (portion 501B) of the blank material 500 to be described later is folded inward of the folded structure 260. In the example illustrated in Fig. 70, the second inward-folded portion 583 has a structure in which the second lower portion is folded on the lower surface side of the first lower portion (so as to cover a part of the lower surface side of the first lower portion or the entire lower surface side of the first lower portion). Two (a pair of) second lower portions of the blank material 500 are defined, and a pair of second inward-folded portions 583 are formed in the folded structure 260.(Obliquely folded portion)

[0268] In the example of the folded structure 260 illustrated in Fig. 70, the second inward-folded portion 583 is formed with an obliquely folded portion 584. The obliquely folded portion 584 is defined as a structure portion formed by folding back the blank material 500 with a straight line extending in an oblique direction to the lower end edge of the blank material lower edge portion 564 as a folding axis. The obliquely folded portion 584 is formed so as to overlap a side end portion of the second inward-folded portion 583, and in Fig. 70, the obliquely folded portion 584 is formed so that the side end portion of the second inward-folded portion 583 has an obliquely inclined shape. In other words, in the example of the bag 10 illustrated in Fig. 70, the folded structure 260 is configured so that the width of the second inward-folded portion 583 decreases from the base end of the second inward-folded portion 583 toward the lower end of the blank material lower edge portion 564. Further, in the example of Fig. 70, the second inward-folded portion 583 is connected to the first inward-folded portion 582 at the end edge of the obliquely folded portion 584. In other words, an outer end edge of the obliquely folded portion 584 and an outer end edge of the first inward-folded portion 582 are common to each other.(Lower end folded-back portion)

[0269] A lower end folded-back portion 581 formed by folding back a predetermined portion of the blank material lower edge portion 564 is formed on at least one of the second inward-folded portions 583. The lower end folded-back portion 581 may be a portion folded back toward the inside of the folded structure 260 (an inward folded-back portion) or a portion folded back toward the outside of the folded structure 260 (an outward folded-back portion). In the example illustrated in Fig. 70, the lower end folded-back portion 581 is formed on one of the two second inward-folded portions 583, and the lower end folded-back portion 581 is formed as an "inward folded-back portion of the folded structure 260". At least a part of the lower end folded-back portion 581 is disposed in the bottom-side overlapping structure portion 580. In other words, at least a part of the lower end folded-back portion 581 is located in the bottom-side overlapping structure portion 580. In the example illustrated in Fig. 70, the entire lower end folded-back portion 581 is disposed in the bottom-side overlapping structure portion 580.(Bottom-side overlapping structure portion)

[0270] The bottom-side overlapping structure portion 580 is defined as an overlapping structure portion in which the pair of second inward-folded portions 583 overlap each other in plan view of the main body 20.(Blank material)

[0271] The blank material 500 illustrated in the example of Fig. 71A has a blank material upper edge portion 563 and a blank material lower edge portion 564 as an outer peripheral edge portion 562, in a case where the thickness direction of the blank material 500 is set to the line-of-sight direction. In the blank material 500, the outer peripheral edge portion 562 indicates a portion defined as "a predetermined portion from the position of the outer peripheral edge to a position slightly inward from the outer peripheral edge", which is a predetermined portion including the outer peripheral edge of the blank material 500. In the blank material 500, a peripheral wall portion corresponding portion 502 defined by a portion corresponding to the peripheral wall portion 21 and a bottom portion corresponding portion 501 defined by a portion corresponding to the bottom portion 22 are defined. Further, in the blank material 500 illustrated in the example of Fig. 71A, there is a pair of blank material side end portions 565. Fig. 71A is a plan view illustrating an example of the blank material 500 for forming the bag 10 according to the thirteenth embodiment. Note that, Fig. 71A illustrates an example of a case where a blank material having the configuration described in the thirteenth embodiment is used. The same applies to Fig. 73A.

[0272] The same definitions as those described in the thirteenth embodiment can be applied to the blank material upper edge portion 563, the blank material lower edge portion 564, and a pair of blank material side end portions 565. In other words, the blank material upper edge portion 563 is a portion of the outer peripheral edge portion 562 to be the portion that forms the opening portion 24, in a case where the main body 20 is formed by the folded structure 260. The blank material lower edge portion 564 is a portion of the outer peripheral edge portion 562 formed on the end side opposite to the blank material upper edge portion 563. The blank material lower edge portion 564 is a portion of the outer peripheral edge portion 562 that will be located at the bottom portion 22 in a case where the main body 20 is formed by the folded structure 260. The pair of blank material side end portions 565 are portions of the outer peripheral edge portion 562 connected to the blank material upper edge portion 563 and the blank material lower edge portion 564, and are located on opposite end sides to each other. The blank material 500 has a first blank material side end portion 565A and a second blank material side end portion 565B as the pair of blank material side end portions 565.

[0273] In the blank material 500, the bottom portion corresponding portion 501 has a first lower portion and a second lower portion. The first lower portion is defined as a portion (portion 501A) of the bottom portion corresponding portion 501 that extends below the portion corresponding to the side wall surface portion. There is a pair (two) of the first lower portions. The second lower portion is defined as a portion (portion 501B) of the bottom portion corresponding portion 501 that extends below the portion corresponding to the wall surface portion. There is a pair (two) of the second lower portions. In the blank material 500, t...

Claims

1. A bag comprising a main body that includes a bottom portion and a peripheral wall portion connected to the bottom portion at a peripheral edge of the bottom portion, and forms a space portion that is surrounded by the bottom portion and the peripheral wall portion and is capable of storing contents, and an opening portion through which the contents are inserted into the space portion, wherein the main body is provided with a position restricting member having a restriction wall portion that restricts movement of the contents in an interior of the space portion, and the position restricting member is bonded to at least an inner surface of the peripheral wall portion, and in a case where the contents are placed in the space portion so that the movement is restricted by the restriction wall portion, when a surface facing the contents among surfaces of the restriction wall portion is defined as a facing surface, the restriction wall portion is configured to be capable of forming a first shape state where the facing surface forms a concave surface and a second shape state different from the first shape state.

2. The bag according to claim 1, wherein the inner surface of the peripheral wall portion has at least one corner portion extending from the bottom portion toward the opening portion, and the position restricting member covers at least a part of at least one of the corner portions in a case where the restriction wall portion is in the second shape state.

3. The bag according to claim 2, wherein the peripheral wall portion has a pair of wall surface portions facing each other and a pair of side wall surface portions facing each other, and each of the wall surface portions is connected to the side wall surface portion at a side end edge of the wall surface portion, and the corner portion is formed at a boundary position between the wall surface portion and the side wall surface portion.

4. The bag according to claim 3, wherein the position restricting member is bonded to the wall surface portion and the side wall surface portion.

5. The bag according to claim 3, wherein in a case where the pair of wall surface portions are defined as a first wall surface portion and a second wall surface portion, a main body gusset portion that changes a separation distance between the first wall surface portion and the second wall surface portion is formed on the pair of side wall surface portions.

6. The bag according to claim 1, wherein the position restricting member further includes an inner bottom portion that supports the contents from below in the interior of the space portion.

7. The bag according to claim 6, wherein the inner bottom portion has a gusset.

8. The bag according to claim 1, wherein the second shape state is a state where a convex surface is formed on the facing surface such that the restriction wall portion extends along the inner surface of the peripheral wall portion.

9. The bag according to claim 1, wherein the position restricting member has an intervening wall that is in surface contact with an inner surface of the peripheral wall portion and is positioned between the peripheral wall portion and the restriction wall portion, and the intervening wall is bonded to at least the inner surface of the peripheral wall portion.

10. The bag according to claim 9, wherein in a case where the restriction wall portion is in the second shape state, a position of a lower end of the restriction wall portion exists at a position above a position of a lower end of the intervening wall.

11. The bag according to claim 10, wherein a gap space portion is formed between the intervening wall and the peripheral wall portion.

12. The bag according to claim 1, wherein a folded-back portion is formed at an upper end of the restriction wall portion.

13. The bag according to claim 1, wherein a reinforcing material is provided at an upper end of the restriction wall portion.

14. The bag according to claim 1, wherein an upper end of the restriction wall portion is provided with a reinforcing material, and the upper end of the restriction wall portion has a folded-back portion, and the folded-back portion is formed to cover the reinforcing material.

15. The bag according to claim 1, wherein the peripheral wall portion has a pair of wall surface portions facing each other, and in a case where the pair of wall surface portions are defined as a first wall surface portion and a second wall surface portion, a lid portion is formed at an upper end of the first wall surface portion so as to be capable of covering an upper end of the second wall surface portion, and the lid portion is provided with an adhesive disposing portion where an adhesive capable of adhering to the second wall surface portion is disposed in a state where the upper end of the second wall surface portion is covered with the lid portion.

16. The bag according to claim 15, wherein a gripping portion is provided at a predetermined position of the first wall surface portion.

17. The bag according to claim 16, wherein the gripping portion rises upward in a case where an upper end of the second wall surface portion is covered with the lid portion.

18. The bag according to claim 15, wherein in the first wall surface portion, a weakened portion is provided at a position avoiding the lid portion or at a portion of the lid portion avoiding the adhesive disposing portion.

19. The bag according to claim 1, wherein the position restricting member has waterproofness.

20. The bag according to claim 1, wherein the main body is formed of a paper-based material.

21. The bag according to claim 1, wherein a waterproof layer is provided on an upper surface side of the bottom portion.

22. The bag according to claim 1, wherein the contents are a container, and in a case where the contents are placed in the space portion, a gap exists between at least a part of an upper end portion of the restriction wall portion and an outer peripheral surface of the container.

23. The bag according to claim 1, wherein the second shape state is a state where the facing surface forms a convex surface.

24. The bag according to claim 6, wherein the inner bottom portion and the restriction wall portion are continuously connected.

25. The bag according to claim 6, wherein in a case where the restriction wall portion of the position restricting member is in the first shape state, at least a part of the inner bottom portion has an inclined surface inclined downward in a direction approaching the peripheral wall portion from a boundary position between the inner bottom portion and the restriction wall portion.

26. The bag according to claim 15, wherein a release paper is provided so as to cover the adhesive disposing portion.

27. The bag according to claim 26, wherein the release paper is provided with a display portion on a side of an exposed surface of the release paper.

28. A bag comprising a main body that includes a bottom portion and a peripheral wall portion connected to the bottom portion at a peripheral edge of the bottom portion, and forms a space portion that is surrounded by the bottom portion and the peripheral wall portion and is capable of storing contents, and an opening portion through which the contents are inserted into the space portion, wherein the peripheral wall portion has a first wall surface portion and a second wall surface portion as a pair of wall surface portions facing each other, and an adhesive member having a first adhesive surface forming portion and a second adhesive surface forming portion is attached to an outer surface of the peripheral wall portion, and the first adhesive surface forming portion is attached to a predetermined region of an outer surface of the first wall surface portion, and at least a part of the second adhesive surface forming portion is configured to be capable of adhering to an outer surface of the second wall surface portion, in a case where a bent structure is formed that is defined by a portion formed by bending the first wall surface portion and the second wall surface portion so that the outer surface of the first wall surface portion and the outer surface of the second wall surface portion face each other in a state where a predetermined portion on an upper end side of the first wall surface portion and a predetermined portion on an upper end side of the second wall surface portion are overlapped with each other, and in a case where the bent structure is not formed, adhesion of the second adhesive surface forming portion to the outer surface of the peripheral wall portion is avoided.

29. The bag according to claim 28, wherein in a case where the second adhesive surface forming portion is adhered to the peripheral wall portion, a grippable gap can be formed between a first peripheral wall portion forming portion that forms the bent structure and a second peripheral wall portion forming portion excluding the first peripheral wall portion forming portion, in the peripheral wall portion.

30. The bag according to claim 28, wherein in a case where the bent structure is formed, the second adhesive surface forming portion is configured to be capable of adhering to the first wall surface portion and the second wall surface portion.

31. The bag according to claim 28, wherein the bent structure is defined by a portion formed by bending the first wall surface portion and the second wall surface portion toward a side of the second wall surface portion so that the outer surface of the first wall surface portion and the outer surface of the second wall surface portion face each other.

32. The bag according to claim 28, wherein the bent structure is defined by a portion formed by bending the first wall surface portion and the second wall surface portion toward a side of the first wall surface portion so that the outer surface of the first wall surface portion and the outer surface of the second wall surface portion face each other.

33. The bag according to claim 28, wherein the opening portion is hidden in the bent structure.

34. The bag according to claim 28, wherein a peeling member having peelability is attached so as to cover the second adhesive surface forming portion.

35. The bag according to claim 34, wherein the peeling member is configured to be prevented from being completely separated from the adhesive member.

36. A bag comprising a main body that includes a bottom portion and a peripheral wall portion connected to the bottom portion at a peripheral edge of the bottom portion, and forms a space portion that is surrounded by the bottom portion and the peripheral wall portion and is capable of storing contents, and an opening portion through which the contents are inserted into the space portion, wherein the peripheral wall portion has a first wall surface portion and a second wall surface portion as a pair of wall surface portions facing each other, and a seal sheet detachably provided with a seal member having an adhesive surface forming portion is attached to an outer surface of the peripheral wall portion, and in a case where a bent structure is formed that is defined by a portion formed by bending the first wall surface portion and the second wall surface portion so that the outer surface of the first wall surface portion and an outer surface of the second wall surface portion face each other in a state where a predetermined portion on an upper end side of the first wall surface portion and a predetermined portion on an upper end side of the second wall surface portion are overlapped with each other, the seal member is disposed so as to straddle a lower end of the bent structure, and is configured to be capable of adhering to the peripheral wall portion in a state where the adhesive surface forming portion faces the first wall surface portion and the second wall surface portion, and in a case where the seal member is adhered to the peripheral wall portion, a grippable gap can be formed between a first peripheral wall portion forming portion that forms the bent structure and a second peripheral wall portion forming portion excluding the first peripheral wall portion forming portion, in the peripheral wall portion.

37. The bag according to claim 36, wherein the seal member has a through hole, and the through hole is configured to be capable of exposing the gap from the through hole in a case where the seal member is adhered to the peripheral wall portion.

38. A bag comprising a main body that includes a bottom portion and a peripheral wall portion connected to the bottom portion at a peripheral edge of the bottom portion, and forms a space portion that is surrounded by the bottom portion and the peripheral wall portion and is capable of storing contents, and an opening portion through which the contents are inserted into the space portion, wherein the peripheral wall portion has a first wall surface portion and a second wall surface portion as a pair of wall surface portions facing each other, and the peripheral wall portion has a small piece portion having an adhesive adhering surface on which an adhesive material is disposed, and the small piece portion has a fixed end fixed to the peripheral wall portion and a free end displaceable relative to the peripheral wall portion, and the free end of the small piece portion can be rotated about at least the fixed end as an axis, and a peeling enabling portion is provided that has a small piece portion opposing surface at a position where the small piece portion opposing surface can face the adhesive adhering surface and can be removably adhered to the small piece portion on the small piece portion opposing surface, and the position where the peeling enabling portion is provided is a position where exposure of the main body to the outside is avoided, and in a state where at least a part of the small piece portion is peeled off from the peeling enabling portion and bent, the small piece portion can be adhered to the peripheral wall portion in a region of the adhesive adhering surface so as to prevent movement that separates the first wall surface portion and the second wall surface portion from each other.

39. The bag according to claim 38, wherein an adhesive element piece formed separately from the peripheral wall portion is adhered to the peripheral wall portion, and a part of the adhesive element piece forms the small piece portion.

40. The bag according to claim 38, wherein the peeling enabling portion is formed separately from the peripheral wall portion and is formed of a release paper.

41. The bag according to claim 40, wherein an adhesive element piece formed separately from the peripheral wall portion is adhered to the peripheral wall portion, and a part of the adhesive element piece forms the small piece portion, and a surface of the release paper opposite to the small piece portion opposing surface is adhered to the adhesive element piece.

42. The bag according to claim 40, wherein an adhesive element piece formed separately from the peripheral wall portion is adhered to the peripheral wall portion, and a part of the adhesive element piece forms the small piece portion, and the adhesive element piece is adhered to an outer surface side of the peripheral wall portion, and the release paper is adhered to an inner surface side of the peripheral wall portion.

43. The bag according to claim 38, wherein the small piece portions and the peeling enabling portions are provided at a plurality of locations, respectively, and each of the peeling enabling portions is provided at a position corresponding to each of the small piece portions.

44. The bag according to claim 38, wherein a tab configured to be grippable extends on a side of the free end of the small piece portion.

45. The bag according to claim 1, wherein the main body has at least one corner portion extending from the bottom portion toward the opening portion on the inner surface of the peripheral wall portion, and the main body is constituted by a folded structure formed by folding a blank material made of a paper-based material, and the position restricting member is bonded to an inner surface side of the folded structure, and the blank material includes a blank material upper edge portion forming the opening portion, and a blank material lower edge portion formed on an opposite end side to the blank material upper edge portion, a first blank material side end portion and a second blank material side end portion as blank material side end portions that are located on opposite end sides and are connected to the blank material upper edge portion and the blank material lower edge portion, and a first overlapping structure corresponding portion defined by a predetermined portion of the first blank material side end portion and a second overlapping structure corresponding portion defined by a predetermined portion of the second blank material side end portion, as overlapping structure corresponding portions for bonding a predetermined portion inward from the first blank material side end portion and a predetermined portion inward from the second blank material side end portion to each other, and the folded structure includes a side end adhesive portion that adheres the first overlapping structure corresponding portion and the second overlapping structure corresponding portion to each other, and the first overlapping structure corresponding portion and the second overlapping structure corresponding portion are positioned in order from the inner surface side of the folded structure, and in the blank material, in a case where a region intended to face the position restricting member is defined as an intended facing region, a position where the blank material is folded at a portion corresponding to the corner portion is defined as a corner portion corresponding bending position, a region of the region of the first overlapping structure corresponding portion that is directed to an inside of the folded structure is defined as a first inward region, and a region of the region of the second overlapping structure corresponding portion that is directed to the inside of the folded structure is defined as a second inward region, at least one of the intended facing regions is a region avoiding the second inward region, is a region crossing the corner portion corresponding bending position, and is determined such that one side end edge of two side end edges of the intended facing region is located in the first inward region.

46. The bag according to claim 45, wherein in the blank material, in a case where a portion of the first overlapping structure corresponding portion corresponding to the side end adhesive portion is defined as an adhesive portion corresponding portion (A), and a portion corresponding to the portion bonding the position restricting member and the folded structure is defined as an adhesive portion corresponding portion (B), at least a part of the adhesive portion corresponding portion (A) also serves as at least a part of the adhesive portion corresponding portion (B).

47. The bag according to claim 45, wherein the main body has a handle structure adhered to the folded structure, and in the blank material, in a case where a region corresponding to the region to be adhered to the handle structure is defined as a handle adhesion region, the handle adhesion region is defined as a region that does not cross an end edge of the blank material side end portion in a state of the folded structure.

48. The bag according to claim 1, wherein the peripheral wall portion has a pair of wall surface portions facing each other and a pair of side wall surface portions facing each other, and each of the wall surface portions is connected to the side wall surface portion at a side end edge of the wall surface portion, and the main body is constituted by a folded structure formed by folding a blank material made of a paper-based material, and the position restricting member is bonded to an inner surface side of the folded structure, and the blank material includes a blank material upper edge portion forming the opening portion and a blank material lower edge portion formed on an opposite end side to the blank material upper edge portion, and the folded structure includes a pair of first inward-folded portions having a structure in which a pair of first lower portions defined by a portion from a lower end of the portion of the blank material constituting each of the pair of side wall surface portions to the blank material lower edge portion is folded inward of the folded structure, and a pair of second inward-folded portions having a structure in which a pair of second lower portions defined by a portion from a lower end of the portion of the blank material constituting the pair of wall surface portions to the blank material lower edge portion is folded inward of the folded structure on a lower surface side of the first lower portion, and includes an overlapping structure portion defined as a portion where the pair of second inward-folded portions overlap each other, and a lower end folded-back portion formed by folding back the blank material lower edge portion is formed in at least one of the pair of second inward-folded portions, and at least a part of the lower end folded-back portion is disposed in the overlapping structure portion.

49. The bag according to claim 48, wherein the second inward-folded portion has an obliquely folded portion formed by folding back the blank material with a straight line extending obliquely relative to a lower end edge of the blank material lower edge portion as a folding axis, and the first inward-folded portion is connected to the obliquely folded portion of the second inward-folded portion, and a width of the second inward-folded portion decreases toward a lower end of the blank material lower edge portion.

50. The bag according to claim 1, wherein at least in the second shape state, the position restricting member has a folded-back structure portion on the restriction wall portion.

51. The bag according to claim 1, wherein the peripheral wall portion has a first wall surface portion and a second wall surface portion as a pair of wall surface portions facing each other, and at least one position restricting member is bonded to the first wall surface portion and the second wall surface portion.

52. The bag according to claim 1, wherein an inner lining material is provided on an upper surface side of the bottom portion.

53. The bag according to claim 52, wherein the inner lining material is a resin sheet.

54. The bag according to claim 53, wherein the inner lining material covers the bottom portion and a predetermined region on a lower end side of the peripheral wall portion.

55. The bag according to claim 1, wherein the peripheral wall portion has a pair of wall surface portions facing each other and a pair of side wall surface portions facing each other, and in a case where the pair of wall surface portions are defined as a first wall surface portion and a second wall surface portion, a main body gusset portion that changes a separation distance between the first wall surface portion and the second wall surface portion is formed in the pair of side wall surface portions, and a deformation restricting structure is provided that is capable of restricting deformation of the main body gusset portion in a case where the main body gusset portion is folded at a predetermined position of the side wall portion.

56. The bag according to claim 1, wherein a handle portion is provided in the main body, and the handle portion has a handle sheet portion and a penetrating portion penetrating the handle sheet portion, and a reinforcing portion is provided so as to face a predetermined region at least above the penetrating portion on a surface of the handle sheet portion.

57. The bag according to claim 56, wherein the reinforcing portion has a structure in which a reinforcing material is bonded to a surface of the handle sheet portion, and the reinforcing material is a resin sheet.

58. The bag according to claim 56, wherein the reinforcing material is partially bonded to the handle sheet portion.

59. The bag according to claim 56, wherein the reinforcing portion has a structure in which a reinforcing material is bonded to a surface of the handle sheet portion, and the reinforcing material is a nonwoven fabric.

60. The bag according to claim 59, wherein the reinforcing material is partially bonded to the handle sheet portion, and the nonwoven fabric includes long fibers.

61. The bag according to claim 56, wherein the reinforcing portion has a folded-back structure on an upper end side of the handle sheet portion, and a reinforcing film is interposed between portions of the handle sheet portion facing each other that form the folded-back structure.

62. The bag according to claim 56, wherein the handle sheet portion is formed integrally with the main body.

63. The bag according to claim 56, wherein the handle sheet portion is formed separately from the main body, and the handle sheet portion and the main body are bonded at a portion inward from a side end of the handle sheet portion.

64. The bag according to claim 56, wherein the peripheral wall portion has a pair of wall surface portions facing each other, and the handle sheet portion is provided on each of the pair of wall surface portions, and a width of the handle sheet portion is smaller than a width of a side wall portion.

65. The bag according to claim 56, wherein the peripheral wall portion has a pair of wall surface portions facing each other, and the handle sheet portion is provided on each of the pair of wall surface portions, and an adhesive is disposed on the handle sheet portion provided on at least one side wall portion.

66. The bag according to claim 1, wherein a handle portion is provided on the main body, and the handle portion includes a handle support sheet portion, a notch portion that is cut out from an upper end edge of the handle support sheet portion to a predetermined position, a handle material disposed so as to cross at least two locations of a contour portion of the notch portion, and a covering material covering a part of the handle material, and the handle support sheet portion and the covering material sandwich the handle material and adhere to the handle material, and the adhesive auxiliary sheet is provided between the handle support sheet portion and the covering material.

67. The bag according to claim 1, wherein the peripheral wall portion has a pair of wall surface portions facing each other and a pair of side wall surface portions facing each other, and each of the wall surface portions is connected to the side wall surface portion at a side end edge of the wall surface portion, and the main body is constituted by a folded structure formed by folding a blank material made of a paper-based material, and the position restricting member is bonded to an inner surface side of the folded structure, and the position restricting member is configured as a continuous belt shape disposed from one side end edge of the blank material toward the other side end edge, and is bonded to the blank material at a predetermined position.

68. The bag according to claim 67, wherein a restricting member bonding portion that bonds the position restricting member and the blank material is constituted by a plurality of unit bonding portions provided independently of each other at different positions, at least one of the restriction wall portions is formed by a portion sandwiched by at least a pair of unit bonding portions of adjacent unit bonding portions, and a length of an upper end edge of the restriction wall portion is longer than a length of a lower end edge of the restriction wall portion.

69. The bag according to claim 1, wherein the position restricting member has water absorbency.

70. The bag according to claim 1, wherein the position restricting member has a large number of restriction wall penetrating portions.

71. The bag according to claim 1, wherein the position restricting member is constituted by a fiber bundle in which a large number of long fibers are arranged.

72. The bag according to claim 1, wherein an area of the facing surface of the restriction wall portion is larger than an area of a region of a surface of the peripheral wall portion corresponding to the facing surface.

73. The bag according to claim 1, wherein in the second shape state, an overlapping portion is formed in the restriction wall portion.

74. The bag according to claim 1, wherein the main body is configured to be capable of deforming a three-dimensional structure of the main body from a first structure to a second structure, and in a case where the main body is in the first structure, the main body has a pair of folded wall surface portions folded so as to form a gusset portion from an upper end to a lower end, and opposing wall surface portions facing each other with the folded wall surface portions interposed therebetween, and has a lower end edge bonding portion that is connected to the folded wall surface portion at each of two side end edges of each of the opposing wall surface portions, and bonds a lower end edge portion of the opposing wall surface portion and a lower end edge portion of the folded wall surface portion facing the first lower end edge portion, and in a case where the main body is in the second structure, the main body has the peripheral wall portion and the bottom portion, and the peripheral wall portion has a pair of wall surface portions facing each other and a pair of side wall surface portions facing each other, and a main body gusset portion is provided in the side wall surface portion, and the wall surface portion is connected to the side wall surface portion at two side end edges of each of the wall surface portions, and a corner portion is provided at a boundary between the wall surface portion and the side wall surface portion, and the three-dimensional structure of the main body is deformed from the first structure to the second structure by folding the main body so as to satisfy the following first to fourth conditions, Condition 1: The gusset portion of the first structure is expanded; Condition 2: The folded wall surface portion is folded inward with a predetermined reference position from a lower end side toward an upper side of each of the folded wall surface portions as a first folding axis, so that a portion of the folded wall surface portion above the reference position is defined as the side wall surface portion; Condition 3: In a portion of the folded wall surface portion below the reference position, a portion of the folded wall surface portion is folded inward with a straight line in an oblique direction from an outer end of the folded wall surface portion toward an inner end of the lower end edge bonding portion as a second folding axis; and Condition 4: The opposing wall surface portion is folded with a straight line connecting two positions connected to the reference position at each of two side end edges of the opposing wall surface portion as a third folding axis, so that a portion of the opposing wall surface portion above the third folding axis is defined as the wall surface portion.

75. The bag according to claim 74, wherein a film material is bonded to at least the lower end edge portion of the opposing wall surface portion.

76. The bag according to claim 74, wherein a crease is imparted at a position corresponding to at least one of the first folding axis to the third folding axis.

77. The bag according to claim 1 comprising a suspension tool receiving structure.

78. The bag according to claim 1 comprising a plurality of closing portions facing each other on an upper side of the peripheral wall portion, wherein at least one of the closing portions has an adhesive surface having an adhesive, and in a case where the adhesive surface of the one closing portion is adhered to an adhesive opposing surface of the other closing portion facing the adhesive surface of the one closing portion, the plurality of closing portions are configured to cover the opening portion.

79. The bag according to claim 78, wherein at least one of the closing portions has an extending portion integrally formed with the main body, and an adhesive surface having an adhesive and an adhesive opposing surface facing the adhesive surface are located in a predetermined region of the extending portion.

80. The bag according to claim 78, wherein at least one of the closing portions is constituted by a closing portion forming member that is formed separately from the peripheral wall portion and is adhered to the peripheral wall portion.

81. The bag according to claim 80 comprising a handle, wherein the closing portion forming member is adhered to the main body on an inner side of the main body relative to the handle.

82. The bag according to claim 78 comprising a handle, wherein the handle includes a handle member and a handle fixing sheet that fixes the handle member, and the handle fixing sheet is adhered to an inner surface side of the peripheral wall portion so as to cover at least a part of the handle member, and at least a part of the handle also serves as the closing portion.

83. The bag according to claim 78, wherein at least one closing portion is provided with a weakened portion above an upper side of the peripheral wall portion and below the adhesive surface.

84. The bag according to claim 78, wherein a lower end of the adhesive surface and the weakened portion are spaced apart.

85. The bag according to claim 78, wherein the closing portion is provided with a notch portion at an end portion of the weakened portion.

86. The bag according to claim 78, wherein each of a plurality of closing portions is provided with a weakened portion, and in a case where the plurality of closing portions are disposed so that an adhesive surface of the closing portion and a facing surface are parallel, the plurality of closing portions are aligned in the positions of the respective weakened portions in a vertical direction.

87. The bag according to claim 78, wherein each of a plurality of closing portions is provided with a weakened portion, and in a case where the plurality of closing portions are disposed so that an adhesive surface of the closing portion and a facing surface are parallel, a lower end of an adhesive surface of one closing portion is located above a weakened portion formed in the other closing portion having a facing surface facing the adhesive surface.

88. The bag according to claim 1, wherein the main body has the peripheral wall portion and the bottom portion, and the peripheral wall portion has a pair of wall surface portions facing each other and a pair of side wall surface portions facing each other, and a main body gusset portion is provided on the side wall surface portion, and the main body gusset portion has a fold line extending downward from an upper end of the side wall surface portion at a predetermined position of the side wall surface portion, and a first protruding portion provided at a first position from an upper end position of the fold line toward one first side end edge of the side wall surface portion and a second protruding portion provided at a second position from an upper end position of the fold line toward the other second side end edge of the side wall surface portion are provided at an upper end of the side wall surface portion, and the first protruding portion and the second protruding portion are disposed so as to be capable of coming into contact with an adhesive surface in a case where the main body gusset portion is closed.

89. The bag according to claim 1, wherein the main body has the peripheral wall portion, and the peripheral wall portion has a pair of wall surface portions facing each other and a pair of side wall surface portions facing each other, and a main body gusset portion is provided on the side wall surface portion, and a lid structure forming portion is provided on an upper side of at least one of the wall surface portions, a protruding portion is provided at an upper end of the side wall surface portion, and at least a part of the protruding portion faces an outside of the wall surface portion in a case where the main body gusset portion is in a contracted state, and at least one of the lid structure forming portions is configured to be capable of forming an opening portion covering structure by being bent from the one wall surface portion to an outer surface side of the other wall surface portion, and has an adhesive layer on an inner surface side of the lid structure forming portion, and in the opening portion covering structure, the adhesive layer is in contact with the protruding portion from an outer surface side of the peripheral wall portion.

90. The bag according to claim 89 comprising a first wall surface portion and a second wall surface portion as the pair of wall surface portions facing each other, and comprising a first lid structure forming portion provided on an upper side of the first wall surface portion and a second lid structure forming portion provided on an upper side of the second wall surface portion as the lid structure forming portion, wherein at least a part of the protruding portion faces an outer surface side of the second lid structure forming portion in a case where the main body gusset portion is in a contracted state, and the first lid structure forming portion is configured to be capable of forming the opening portion covering structure by being bent to cover at least a part of the second lid structure forming portion and to position a tip of the first lid structure forming portion on an outer surface side of the second wall surface portion.

91. The bag according to claim 90, wherein the second lid structure forming portion has an exposure facilitating portion, and the protruding portion faces outward from the exposure facilitating portion.

92. The bag according to claim 89, wherein in a case where the lid structure forming portion is in an upright state, an upper end edge of the first lid structure forming portion is located above an upper end edge of the second lid structure forming portion.

93. The bag according to claim 89, wherein at least one of the lid structure forming portions is integrally formed with the peripheral wall portion.

94. The bag according to claim 89, wherein at least one of the lid structure forming portions has a lid structure forming member that is formed separately from the peripheral wall portion and is adhered to the peripheral wall portion.

95. The bag according to claim 89, wherein a handle is provided on an outer surface side of the peripheral wall portion.

96. The bag according to claim 1, wherein the main body has the peripheral wall portion and the bottom portion, and the peripheral wall portion has a first wall surface portion and a second wall surface portion as a pair of wall surface portions facing each other, and has a first lid structure forming portion provided on an upper side of the first wall surface portion, and a second lid structure forming portion provided on an upper side of the second wall surface portion, and an adhesive layer is provided on an inner surface side of the first lid structure forming portion, and a weakened portion is formed at a predetermined position closer to the bottom portion than the adhesive layer along a surface of the first lid structure forming portion, and the weakened portion is formed so that in a case where the weakened portion is broken, an upper portion close to a tip of the first lid structure forming portion and a lower portion away from the tip of the first lid structure forming portion can be divided using the weakened portion as a reference, and an opening portion covering structure can be formed that has a structure in which the first lid structure forming portion and the second lid structure forming portion are bent toward an outer surface side of the second wall surface portion and a structure in which the tip of the first lid structure forming portion is positioned on the outer surface side of the second wall surface portion.

97. The bag according to claim 96, wherein the peripheral wall portion has a pair of side wall surface portions facing each other, and has a side wall extension portion where a predetermined portion of an end portion of the side wall surface portion is extended upward, and an end portion extension portion where a predetermined portion of a side end portion of the second lid structure forming portion is extended upward, and an end edge of an end edge portion of the second lid structure forming portion and an end edge of the end portion extension portion continuous with the end edge portion also serve as an end edge of the side wall extension portion.

98. The bag according to claim 97, wherein a side wall weakened portion is provided in a side wall extension portion where a predetermined portion of an end portion of the side wall surface portion is extended upward.

99. The bag according to claim 96, wherein the peripheral wall portion has a pair of side wall surface portions facing each other, and a main body gusset portion is provided on the side wall surface portion, and a recess cut out in a concave shape from an upper end of the second lid structure forming portion toward the bottom portion is formed, and the recess is configured to allow a part of the side wall surface portion to be faced in a case where the main body gusset portion is in a contracted state.

100. The bag according to claim 99, wherein a main body gusset portion is provided on the side wall surface portion, and the side wall surface portion has a plurality of sections that overlap each other in a case where the main body gusset portion is in a contracted state, and a first penetrating portion is formed at a position corresponding to the recess in a designated section defined as the section among the plurality of sections that faces a contour portion of the recess.

101. The bag according to claim 100, wherein a second penetrating portion is formed at a position corresponding to the first penetrating portion in an opposing section defined as the section among the plurality of sections that faces the designated section in a case where the main body gusset portion is in a contracted state.

102. The bag according to claim 101, wherein a wall surface portion weakened portion is formed at a position corresponding to the second penetrating portion in the first wall surface portion and / or the first lid structure forming portion.

103. The bag according to claim 96, wherein a handle is provided on an outer surface side of the peripheral wall portion.

104. The bag according to claim 1, wherein the main body has the peripheral wall portion, and the peripheral wall portion has a pair of wall surface portions facing each other, and a lid structure forming portion is provided on an upper side of at least one of the wall surface portions, and the lid structure forming portion is configured to be capable of forming an opening portion covering structure by being bent from the one wall surface portion to an outer surface side of the other wall surface portion with a predetermined position as a bending axis, and includes, on an inner surface side of the lid structure forming portion, an adhesive layer at least partly disposed above the bending axis and a reinforcing sheet disposed in a region from a predetermined position above the bending axis to a predetermined position below the bending axis, and a weakened portion is formed along the bending axis.

105. The bag according to claim 104, wherein the adhesive layer is adhered to a surface on an inner surface side of the reinforcing sheet.

106. The bag according to claim 104, wherein the peripheral wall portion has a pair of side wall surface portions facing each other, and a main body gusset portion is provided on the side wall surface portion, and an extending wall portion continuous with the lid structure forming portion is provided on an upper side of the side wall surface portion, and the opening portion covering structure is formed with a structure in which both the lid structure forming portion and the extending wall portion are bent from the one wall surface portion to an outer surface side of the other wall surface portion.

107. The bag according to claim 106, wherein the weakened portion is further formed in the extending wall portion.

108. The bag according to claim 106, wherein the lid structure forming portion has a portion where a contour of the lid structure forming portion is inclined obliquely upward in a direction away from a reference position, with an upper end of a boundary position between the lid structure forming portion and the extending wall portion as the reference position.

Images