Stand-up bag

Abstract

The present invention aims to provide a self-standing bag that can store grapes or the like in an upright position and also provides cushioning for the stored items. [Solution] This self-standing bag is formed by folding a single sheet to create a bag with a front and back surface and a bottom made up of folds. Both sides have side seals, both the front and back surfaces have folded bottoms, the front surface and the front-side folded piece have a surface inclined seal, the sides of the bag have a protruding seal that forms a constriction in the central part of the bag's body toward the inside of the bag, and the back surface seal seals the surface where the back surface of the bottom of the back surface of the bag meets the back-side folded piece.

Description

Technical Field

[0001] The present invention relates to a self-supporting bag, particularly a bag body that can store grapes or the like in a vertical state and has cushioning properties for the stored items.

Background Art

[0002] A bag body made of a resin sheet or film and having a gusseted bottom for standing upright is formed by making an incision from the side to the bottom inward during bag making and sealing the bottom side edges in an inclined state. Therefore, the bottom of the bag body having a bottom side edge is usually formed in a substantially hexagonal shape or the like to form a bottom surface, and this portion can be used to stand upright. For example, there is a bag body shown in Japanese Patent Application Laid-Open No. 6-312750 (Patent Document 1) as a bag body having such a gusseted bottom. Furthermore, there are many prior examples having a gusseted bottom, such as Japanese Utility Model Registration No. 3028300 (Patent Document 2), Japanese Patent Application Laid-Open No. 2001-301771 (Patent Document 3), Japanese Patent Application Laid-Open No. 2005-087023 (Patent Document 4), and the like.

[0003] Such a bag body can store contents in a standing state. For example, it is possible to store grapes or the like in this bag body and display and sell them. However, in such a bag body, since the bottom of the bag body contacts the ground surface of the bag body, the contents contact the floor, the mounting table, etc. at this portion. For example, when storing grapes or the like, the grapes themselves contact the other surface, and the quality deteriorates due to the weight of the grapes. On the other hand, there is also a bag for packaging cluster fruits shown in Japanese Patent Application Laid-Open No. 2022-104159 (Patent Document 5) invented by the inventor of the present application. By storing cluster fruits such as grapes in this bag body, it is possible to prevent the grapes from contacting the floor or the like on the mounting surface of the bag.

[0004] However, in this bag, it is necessary to store the grapes lying on their sides, and the stems of the grapes are inserted into holes inside the bag and integrated with the bag using a linear member made of shape-memory resin. Therefore, it can be used as a bag that can package clusters of fruit, such as grapes, while maintaining their quality. However, even with this bag, the grape stems must be inserted into the holes of the bag and twisted, and the linear members made of shape-memory resin must be rolled up and fixed inside the bag, meaning that each step of storing them inside the bag requires some effort. Furthermore, grapes typically grow hanging vertically from the vine, with the branches drooping downwards. This gives the bunches a fixed orientation, and maintaining a similar growth state helps preserve the quality of the grapes. Therefore, when storing grapes or other fruits in bags, it is more appropriate to store them in a state that is as close as possible to their growing conditions. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 6-312750 [Patent Document 2] Registration No. 3028300 [Patent Document 3] Japanese Patent Publication No. 2001-301771 [Patent Document 4] Japanese Patent Publication No. 2005-087023 [Patent Document 5] Japanese Patent Publication No. 2022-104159 [Overview of the project] [Problems that the invention aims to solve]

[0006] As described above, in the case of cluster fruits such as grapes, they are usually displayed and sold in stores in hard plastic containers. However, because they are bulky, it is common practice to place each grape in a separate container and then seal them in a plastic bag for display and sale. Doing it this way requires both boxes and bags, is very time-consuming, and leads to high costs. Furthermore, in order to minimize current use and be more environmentally friendly, it is necessary to reduce the amount of these components as much as possible. Therefore, it was considered to seal the grapes in plastic bags for sale, but this had the drawback that, for example, the grapes at the bottom would deteriorate due to their own weight.

[0007] Therefore, the invention shown in Patent Document 5 exists to solve this problem. However, in this invention, when sealing grapes inside the bag, it is necessary to roll up and close the bag around the stem portion. Furthermore, since the grapes will inevitably be stored horizontally, in order to minimize the deterioration of grape quality, it is necessary to recreate conditions as close as possible to those of the grapes growing on the vine. Therefore, there is a need for a bag that can reduce the deterioration of grapes due to their own weight and reduce the deterioration of grape quality by keeping them in a state closer to their growing condition. In this case, especially when grapes are enclosed in bunches, they have a certain weight, and there may be cases where the weight of the grapes prevents the bag from standing upright.

[0008] Therefore, in order to enable the grape bags to stand on their own, it is desirable to help maintain an upright position within the bag structure. In particular, it is required to enclose heavy grapes in a bag in an upright position, and to ensure that the bag stands upright in an aesthetically pleasing manner while the grapes are enclosed. In addition, while this bag is particularly ideal for grapes, we can also provide bags that can be used for storing various vegetables and fruits, such as cherry tomatoes. [Means for solving the problem]

[0009] To that end, the invention according to claim 1 is a self-standing bag having a bottom made of a folded front and back surface and a folded bottom made by folding a single sheet, wherein both sides of the bag are formed by side seal portions, the bottom of the bag is a self-standing bag having a folded bottom on both the front and back surfaces, and has a surface inclined seal portion on the surface where the surface of the bag and the surface of the folded piece on the front side meet, the surface inclined seal portion is a seal portion formed inclined toward the inside of the bag from the seal portions on both sides of the bag, and is an inclined seal portion formed diagonally toward the bottom of the bag from the side seal portions on both sides of the bag at an arbitrary position toward the bottom of the bag rather than the folded position inside the bag, the side of the bag has a protruding seal portion that forms a constriction toward the inside of the bag at the central part which is the body of the bag, and has a back seal portion that seals the surface where the back surface of the bottom of the back surface meets the surface of the folded piece on the back side. The aforementioned problem can be achieved by the invention described herein.

[0010] Next, the invention according to claim 2 is a bag having a bottom made of a folded front and back surface and a folded bottom, the sides of the bag being formed by sealing portions, the bottom of the bag being an upright bag having a folded bottom on both the front and back surfaces, having a surface inclined sealing portion on the surface of the bag that contacts the surface of the folded front piece, the surface inclined sealing portion being a sealing portion formed inclined toward the inside of the bag from the sealing portions on each side of the bag, an inclined sealing portion formed diagonally toward the bottom of the bag from the side sealing portions on each side of the bag at an arbitrary position toward the bottom of the bag rather than the folded back position inside the bag, having a protruding sealing portion on the side of the bag that forms a constriction toward the inside of the bag at the central part which is the body of the bag, and a surface sealing portion that seals the surface of the bag that contacts the surface of the folded front piece surrounded by the side sealing portions on the surface of the bag, the surface inclined sealing portion and the bottom of the bag. The aforementioned problem can also be achieved by the invention described herein.

[0011] Furthermore, the invention according to claim 3 is a bag having a bottom made of a folded front and back surface and a folded bottom, wherein both sides of the bag are formed by side seal portions, the bottom of the bag is an upright bag having a folded bottom on both the front and back surfaces, and the surface of the bag has a surface inclined seal portion on the surface where the surface of the bag and the surface of the folded piece on the front side meet, the surface inclined seal portion is formed to be inclined inward from the seal portions on both sides of the bag, and the side edges of both sides of the bag are at an arbitrary position in the bottom direction from the folded portion position inside the bag The present invention provides a self-standing bag having an inclined seal portion formed diagonally from the seal portion toward the bottom of the bag, a protruding seal portion formed on the side of the bag with a constricted portion formed toward the inside of the bag at the central part which is the body of the bag, a back seal portion that seals the surface where the back of the bottom of the back of the bag meets the surface of the back side folded piece, and a front seal portion that seals the surface where the surface of the bag meets the surface of the front folded piece, surrounded by the side seal portion of the front edge of the bag, the inclined seal portion of the front surface, and the bottom of the bag, and the present invention can also solve the above problem.

[0012] Furthermore, the invention according to claim 4 is a self-standing bag in which the back surface sealed portion, which seals the contact surface between the back surface of the bottom of the back surface of the bag body and the surface of the back surface folded piece, has an unsealed portion on both sides. It is also acceptable to use such invention. Furthermore, the invention according to claim 5 is a self-standing bag in which the surface seal portion, which seals the surface of the bag body and the surface of the folded-over piece that are surrounded by the side seal portion of the surface of the bag body, the surface inclined seal portion and the bottom portion of the bag body, has an unsealed portion on both sides that is not sealed, and this invention may also be used. In addition, as in the invention of claim 6, the back seal portion, which seals the surface where the back surface of the bottom of the back of the bag body and the surface of the back side folded piece are in contact, has an upper edge portion of the back seal portion formed in a concave arc shape, and is a self-standing bag consisting of a back seal portion formed by sealing the surface that is in contact with the bottom of the bag body. It is also acceptable to use such invention.

[0013] In addition, the invention according to claim 7 may be a stand-up pouch that is adhered with an adhesive member instead of a seal.

[0014] Furthermore, the above problem can be solved by using a stand-up pouch that forms a plurality to a large number of non-sealed portions at an arbitrary position of the sealed portion as in the invention according to claim 8 or 9. Alternatively, a stand-up pouch in which the non-sealed portion is formed in a circular or elliptical shape as in the invention according to claim 10, or a stand-up pouch in which the non-sealed portion is formed in a star shape as in the invention according to claim 11 may be used.

Advantages of the Invention

[0015] First, the inventions according to claims 1 to 3 enable the provision of a bag body that can be stored in a vertical state when storing items such as grapes. In particular, the strength around the bottom of the bag body is increased, and even when storing heavy items such as grapes, the stand-up state can be maintained. Furthermore, even during storage, the stored items such as grapes can be stored in a state close to the growth status of the stored items, and quality retention and the like can be improved. In particular, the tip of the grape can be positioned downward by the surface inclined seal portion.

[0016] Furthermore, at the bottom surface portion of the bag body, since the stored item is stored at the position on the bottom surface during storage, the content is stored in a so-called hammock shape, and pain caused by the weight of the stored item can be greatly reduced. For example, when storing grapes or the like, threshing, shaft wilt, and deterioration of quality due to the weight on the bottom can be prevented. Furthermore, since the bag can be formed from a single sheet of fabric, the amount of resin used can be reduced, and the environmental impact can be reduced. In particular, the use of a hard container or the like can be eliminated, and the amount of raw materials used can be reduced.

[0017] Next, the invention according to claim 4 or 5 enables the formation of a non-sealed portion, and the sealing time can be shortened when forming the periphery of the bottom of the bag body with a seal portion. Therefore, bag making can be facilitated. In this case, it also has a sealing portion, which helps maintain the self-standing ability of the self-standing bag.

[0018] Furthermore, claim 6 allows for the formation of an arc-shaped recess in which the stem portion of the grapes can be positioned when the grapes are stored, enabling the stored grapes to be stored in a fixed position in an upright state. Furthermore, according to the invention of claim 7, bags can also be made using adhesive members. Furthermore, the inventions according to claims 8 to 11 make it possible to form multiple or numerous non-sealed portions at arbitrary positions on the sealed portion, and to form circular, elliptical, or star-shaped non-sealed portions. [Brief explanation of the drawing]

[0019] [Figure 1] This figure shows an example of a self-standing bag according to the present invention, illustrating a state in which grapes are enclosed inside the bag and it is standing upright. [Figure 2] A diagram showing the surface side of an example of a self-standing bag according to the present invention. [Figure 3] A diagram showing the back side of an example of a self-standing bag according to the present invention. [Figure 4] Figures 2 and 3 show an example of a side view of a bag with a space formed inside. [Figure 5] Figures 2 and 3 show a perspective view illustrating an example of the bag structure. [Figure 6] A diagram showing a self-standing bag according to the present invention, in which grapes are stored. [Figure 7] Figure 6 shows an example of how grapes are stored inside a bag. [Figure 8] A diagram showing another example of a self-standing bag according to the present invention, viewed from the side. [Figure 9] A diagram showing another example of a self-standing bag according to the present invention, viewed from the side. [Figure 10] A diagram showing another example of a self-standing bag according to the present invention, viewed from the side. [Figure 11] A diagram showing another example of a self-standing bag according to the present invention, viewed from the side. [Figure 12]A diagram showing another example of a self-standing bag according to the present invention, viewed from the side. [Figure 13] A diagram showing the surface side of another example of a self-standing bag according to the present invention. [Figure 14] A diagram showing the surface side of another example of a self-standing bag according to the present invention. [Figure 15] A diagram showing the surface side of another example of a self-standing bag according to the present invention. [Figure 16] This figure shows another example of a self-standing bag according to the present invention, illustrating a state in which cherry tomatoes are enclosed inside the bag and it is standing upright. [Modes for carrying out the invention]

[0020] Figure 1 is a diagram showing an example of a self-standing bag according to the present invention, illustrating a state in which grapes are sealed inside the bag and the bag is standing upright, and is a diagram showing an example of a usage state in which grapes are stored inside the bag according to the present invention and the bag is in an upright state. The bag (1) according to the present invention is made of a sheet fabric consisting of an outer and inner surface, and the sheet is folded at the bottom to form a fold, and the folded portion (5) inside the bag at the folded part becomes the bottom of the bag. The bottom portion (4) is formed by folding, and therefore has a folded portion on the front side (10) and a folded portion on the back side (11), and further has a folded-over portion (5) between them. Furthermore, both sides of the bag body are sealed to form side seal portions (3).

[0021] This side sealing portion (3) has a protruding sealing portion (7) that is bent in the direction toward the inside of the bag at the central part which is the body of the bag. This protruding seal portion (7) is also sealed along its side edge. As a result of this construction, the protruding seal portion (7) of the bag body protrudes inward from the two sheets on the front and back of the bag body, and the inside of the bag body is formed to be narrow. Furthermore, this protruding seal portion (7) is formed on both sides. Therefore, the grapes stored inside the bag in this section are neatly contained within the bag, preventing them from shifting to one side unintentionally, and ensuring they are securely stored in the center of the bag.

[0022] Furthermore, at this height, the width of the bag body narrows due to the protruding seal portion (7). Furthermore, this sealed portion is sealed by welding, fusion, adhesive, etc., forming a sealed portion (3) that shapes both sides of the bag body. For example, a material with a certain width and strength may be used. Furthermore, it has a surface (1a), a folded portion (10) on the surface side, a back side (1b), and a folded portion (11) on the back side. The surface (1a) and the folded portion (10) on the surface side are in contact, and there is an oblique surface inclined sealing portion (8) at this contact point. Furthermore, the surface (1a) and the folded portion (10) on the surface side seal each other between this surface inclined sealing portion (8) and the bottom edge of the bottom (4) of the bag body, forming a surface sealing portion (15).

[0023] In this case, the circular area is the unsealed portion. The presence of this circular, unsealed portion allows for a reduction in the sealing time of the remaining portion, thereby shortening the bag manufacturing time. Furthermore, since the parts other than the unsealed portion (14) are sealed, the strength of that portion can be maintained at a high level. In particular, in this figure, the non-sealed portion (14) is formed in multiple or numerous locations at arbitrary points throughout the entire sealed portion; for example, it is sufficient if multiple or numerous portions are formed at equal intervals. Similarly, the back surface (1b) and the folded portion (11) on the back side are in contact, and this contact area is sealed, forming a back surface sealing portion (16).

[0024] Furthermore, the back surface seal portion (16) has an unsealed portion, for example, a circular unsealed portion (14). This surface inclined seal portion (8) is a seal formed inclined toward the inside of the bag from the side seal portion (3) on the side of the bag, and is formed by an inclined seal portion (8) formed toward the bottom of the bag from the side seal portion (3) on both sides of the bag at an arbitrary position toward the bottom of the bag, rather than the position of the folded portion (5) inside the bag. The surface-sloping sealing portion (8) is a sealing portion (8) formed from both sides of the bag body (1) toward the bottom of the bag body to the bottom (4). Therefore, the surface inclined sealing portion (8) is a sealing portion formed at an angle toward the inside of the bag from the sealing portions (3) on both sides of the bag, and is an inclined sealing portion formed toward the bottom of the bag from the side sealing portions (3) on both sides of the bag at an arbitrary position toward the bottom of the bag, rather than the folded portion position inside the bag.

[0025] Therefore, the front part of the bag is formed with strength by the surface inclined sealing portion (8) of this surface and the surface sealing portion (15) that is in contact with the surface (1a) and the surface-side folded portion (10). Furthermore, on the reverse side, the back surface (1b) and the back side folded flap (11) are in contact with each other, and the back seal portion (16) is formed by the seal portion, which increases the strength of the back side of the bag. Therefore, the overall strength of the bottom of the bag can be maintained at a high level. Furthermore, regarding the surface inclined sealing portion (8) and the surface sealing portion (15), it is more optimal if, for example, the surface inclined sealing portion (8) provides a stronger seal. This surface-sloping seal portion (8) allows for proper maintenance of the storage position of the grape (G) bunch towards the tip.

[0026] Furthermore, the surface inclined seal portion (8) and the back surface seal portion (16) form the bottom of the bag, on which the stored grapes rest. Therefore, the grapes are stored in a so-called hammock-like manner by the bottom portion. Furthermore, a surface sealing portion (15) is provided between the bottom portion (4), which is formed by folding the surface sheet material, and the surface inclined sealing portion (8). Furthermore, this method is not limited to forming the product by sealing overlapping sheets; it may also be formed by bonding them together with an adhesive, for example. Therefore, regarding the seal, it may be one that fuses or welds the two together, or another that uses adhesive materials to bond them together.

[0027] Furthermore, in addition to those formed by sealing the entire structure, there may also be unsealed or unadhered portions (14) at arbitrary positions. For example, by having multiple or numerous unsealed areas in a circular shape, the sealing time can be shortened. For example, this figure shows an example in which a circular non-seal portion (14) is formed, but the non-seal portion may be formed in other shapes as well. Thus, regardless of whether or not there is a non-sealed surface, the surface seal portion (15) on the surface increases the strength of that portion, making it less prone to bending, and further increasing the upright strength.

[0028] Similarly, the back surface has a back sealing portion (16) on the surface where the back sheet (1b) and the back side folded portion (11) meet, and a non-seal portion (14) may be arbitrarily formed in the same way as the front surface. The presence of this non-sealed portion (14) significantly reduces the sealing time, and the presence of a tightly sealed portion (16) on the back ensures high strength in that area. This increases the strength of the bag even when storing heavy grapes, allowing the bag to maintain its storage condition. Therefore, the stored grapes (G) can be kept neatly upright, maintaining an extremely high level of appearance during display and sale, and the stored grapes (G) can be positioned in a hammock-like, hollow position, preventing any unintended external forces from acting on the grapes (G).

[0029] This not only allows the stored grapes (G) to be kept neat and tidy, but also securely holds them inside the bag, preventing unintended force from being applied to the grapes (G), and ensuring that the stored items are kept in a safe, hygienic, and clean state. In other words, it prevents not only quality deterioration such as crushing, but also accidental shedding of grains. While grapes (G) are specifically shown in this diagram, the container is not limited to grapes; it could certainly be used to store other fruits, such as cherry tomatoes. Furthermore, the bag has a handle (6) near the opening, making it easier to carry the self-standing bag containing the grapes.

[0030] Figure 2 shows an example of a self-standing bag according to the present invention, and is a front view of the surface side of the self-standing bag.

[0031] The bag (1) according to the present invention is formed by using a single sheet of fabric and folding in the bottom portions on the front and back sides to form folded bottom portions on both sides, thereby creating a self-standing bag. Therefore, the bag (1) is formed by folding a sheet of material and has a front and back surface, and both sides of the bag are formed by sealing portions (3), and the top has an opening (2). Furthermore, it has a handle (6) near the opening. Furthermore, the central portion of both sides of the bag-like body has a constricted area that extends inward.

[0032] This constricted portion has a sealing portion (7) that protrudes inward from the bag body, formed by bending in the central part of the bag body. Furthermore, this protruding seal portion (7) is also sealed along its side edge. Therefore, the body of the bag has a protruding sealing portion (7) that narrows the width of the bag. This protruding seal portion (7) is formed by sealing the front and back surfaces of the bag body, and the seal portion is formed on the side edge. Therefore, the self-standing bag according to the present invention is made of a sheet fabric consisting of an outer and inner surface, and the sheet is folded at the bottom to form a fold, and the folded portion (5) inside the bag body becomes the bottom surface portion of the bottom (4) of the bag body.

[0033] This bottom portion (4) is formed by folding, so it is folded back with the surface sheet (1a) and the surface-side folded piece (10), and is formed by folding back with the back sheet (1b) and the back-side folded piece (11), and further has a folded portion (5) between the surface-side folded piece (10) and the back-side folded piece (11). Therefore, this folded portion (5) becomes the central part of the bottom surface of the inside of the bag. Firstly, a single sheet is folded to form a bag with a bottom (4) consisting of a front and back surface and a fold, and both sides of the bag are formed by side seal portions (3). In this case, the seal is formed by welding, fusion, adhesive, etc., and the sealed portion (3) forms both sides of the bag body.

[0034] Alternatively, it may be formed by adhesive. For example, a material with a certain width and strength may be used. In this case, it has a front surface (1a), a folded portion on the front surface (10), a back surface (1b), and a folded portion on the back surface (11). In this case, the surface (1a) and the surface of the surface-side folded piece (10) are in contact, and a surface-sloping sealing portion (8) is provided at this contact point. Furthermore, a surface-sloping sealing portion (15) is formed between the surface-sloping sealing portion (8) and the bottom, at the contact surface of the surface sheet (1a) and the surface-side folded piece (10). In this case, it has a circular non-seal portion (14), and has a non-seal portion that is not sealed at any position among the positions where the surface seal portion (15) is located.

[0035] This surface-sloping seal portion (8) is a seal formed at an angle toward the inside of the bag from the seal portion (3) on the side of the bag, and is formed by an inclined surface-sloping seal portion (8) formed toward the bottom of the bag from the side seal portions (3) on both sides of the bag at an arbitrary position toward the bottom of the bag, rather than the folded portion (5) position inside the bag. The surface inclined sealing portion (8) is a sealing portion (8) formed from both sides of the bag body (1) toward the bottom of the bag body, and is formed up to the bottom of the bag body (4) at a position closer to the side edge of the bag body where the base point (P) is located than the position of the base point (P) of the surface inclined sealing portion (8) formed from the sealing portions (3) on both sides of the bag body, rather than the center of the bottom of the bag body (4). Therefore, the bottom center of the sheet material of this surface (1a) has a gap between the sealing portions formed by each surface inclined sealing portion (8).

[0036] The tip portions of the surface-sloping sealing parts (8) formed from both sides in this manner have a gap between them at the bottom portion of the surface on the surface side of the bag body, and the two portions do not touch. With this configuration, the seal does not create an internal space around the leading edge of the items stored vertically in the bag; instead, the leading edge of the stored items is positioned at the fold at the bottom. This allows the load on the tip, which is based on its own weight, to be distributed by the gap in the tip, thereby reducing the load on the stored items. For example, when storing grapes, the load on the grapes at the tip of the container due to the grapes' own weight can be reduced, which can prevent the grapes from falling off and also prevent a deterioration in the quality of each grape stored at the tip.

[0037] Figure 3 shows an example of a self-standing bag according to the present invention, and is a front view of the back side of the self-standing bag. The bag (1) according to the present invention is a self-standing bag made by folding the bottom portions on the front and back sides of a single sheet of fabric, forming folded bottom portions on both sides, and the sides of the bag are formed by side seal portions (3), and the top has an opening (2). The top also has a handle portion (6). Furthermore, the central portion of both sides of the bag-like body has a constricted area that extends inward. This constricted portion has a sealing portion (7) that protrudes inward from the bag body, formed by bending in the central part of the bag body. Furthermore, this protruding seal portion (7) is also sealed along its side edge.

[0038] Therefore, the body of the bag has a protruding sealing portion (7) that narrows the width of the bag. Furthermore, this reverse side is formed by folding in the bottom (4), and the reverse sheet (1b) is folded back at the bottom to form the folded portion (11) on the reverse side. In particular, it has a folded portion (5) between the folded portion (10) on the front side and the folded portion (11) on the back side. Therefore, the folded portion (5) is connected to the surface-side folded portion (10), and this connected portion becomes the central part of the bottom surface inside the bag. Firstly, a single sheet is folded to form a bag with a front and back surface and a bottom (4) made up of the fold, and both sides of the bag are formed by seals (3).

[0039] For example, a material with a certain width and strength may be used. Furthermore, the back sheet (1b) and the back side folded portion (11) are in contact, and the contact portion has a back sealing portion (16) that seals the space between them. In this figure, the upper part of the back seal portion (16) is formed by a concave, arc-shaped structure, and the back seal portion (16) extends from this position towards the bottom. Therefore, the portion where the back surface (1b) and the back side folded portion (11) come into contact forms a back surface sealing portion (16), and the central part of the upper edge of this back surface sealing portion (16) is formed into an arc-shaped recess. Therefore, the central portion forms a seal portion (16) on the surface where the back surface (1b) and the back side folded flap (11) meet, extending from the upper edge portion which is formed in an arc-shaped recess to the bottom of the bag.

[0040] In this case as well, it has a circular non-seal portion (14), and has a non-seal portion (14) that is not sealed at any position among the positions where the back surface seal portion (16) is located. Having a non-sealed portion (14) in this area significantly reduces sheet time, which is a great advantage during bag making. On the other hand, because the back sheet portion (16) is present over a wide area, the sheet strength will be above a certain level. This results in a stronger ability of the bag to stand upright. Furthermore, the upper edge of the back seal portion (16) is formed in an arc shape, and its central part is formed in a recessed shape, which allows the center of the grapes stored inside the bag to be positioned in the center, resulting in a neatly organized storage area with a center of gravity in the middle.

[0041] Figure 4 shows an example of a side view of the self-standing bag shown in Figures 2 and 3, with a space formed inside the bag body. This is similar to a diagram showing the state of a bag with its contents inside. Therefore, this diagram shows the bag becoming self-supporting when items are placed inside it, and it is a diagram of the bag standing upright. The surface of the bag maintains high strength near the bottom thanks to the surface inclined seal portion (8) and the surface seal portion (15), and the back of the bag maintains high strength near the bottom thanks to the back seal portion (16), allowing it to stand upright with even greater strength. This provides a bag that can stand upright even when storing heavy items such as bunches of grapes.

[0042] Furthermore, it has a non-sealed portion (14), and this portion is not sealed. Furthermore, the upper part of the bottom (4) of the bag body, formed by the enclosed front-side folded flap (10) and back-side folded flap (11), forms the bottom surface of the inside of the bag body, and stored items can be placed on top of this part. In this case, the surface inclined sealing portion (8), the surface sealing portion (15), and the back sealing portion (15) form the framework that makes up the bottom area of ​​the bag when it is standing upright. Therefore, the bottom surface on which the stored items are placed is formed by the surface-side folded piece (10) separated by the surface-side inclined sealing portion (8) and the back-side folded piece (11) which does not form a back-side sealing portion (15), and the front end of the stored items is located at the bottom where the respective surface-side inclined sealing portions (8) are close together, and the axial direction is located at the arc-shaped recess in the center of the upper edge portion of the back-side sealing portion (15).

[0043] With this configuration, heavy items stored in the bag will have their bottoms supported at the left and right points by the opposing side seal portions (3), and further support will be provided around the bottoms (4) by the surface inclined seal portion (8) and the back seal portion (16) of the bag body. This means that the bottoms (4) will be supported at four points, front, back, left, and right, at approximately equal intervals, making it possible to provide a stable, upright bag. This means that the grapes placed on the base surface are not only safely stored in a hammock-like manner, but the arrangement can be precisely formed, allowing for secure and safe storage while maintaining an upright position.

[0044] Next, as for the structure of this bag, it may be a bag made of a resin sheet that is commonly used for bags, and may be made of various commonly used resin sheets or films such as polypropylene, polyethylene, polyester, and polyethylene terephthalate, for example, a sheet or film that is slightly thicker may be used. For example, a sheet or film with any thickness between 60 and 150 microns may be used, such as around 90 microns, or between 40 and 50 microns, or around 60 microns. Alternatively, a sheet or film having any thickness of approximately 150 to 200 microns may be used. Furthermore, a sheet or film having any thickness of approximately 200 to 250 microns may be used.

[0045] Furthermore, it may not be limited to single layers, but may also use multi-layered or multi-layered sheets or films. For example, a sheet material made by forming multiple layers of films of approximately 50 microns and 100 microns in thickness may be used. Therefore, the bag may be made of a sheet-like material formed by creating multiple or numerous layers of sheets or films of various thicknesses. Although the term "sheet fabric" is explicitly used in this invention, it is a general term for sheets or films consisting of a single layer, multiple layers, or several layers; any bag made of sheet fabric is acceptable.

[0046] Figure 5 is a diagram showing an example of a self-standing bag according to the present invention, and is a diagram showing an example of a perspective view.

[0047] The surface inclined sealing portion (8) is formed in a connected state from the side sealing portion (3) and extends to the bottom portion (4) of the bag body (1) at the front of the bag body, and is formed inclined toward the front, which is the surface (1a) of the bag body (1). Furthermore, the reverse side (1b) has an arc-shaped recess in the center of the upper edge portion of the reverse side seal portion (16), and the bottom surface of the bag on which the stored items are placed is formed by the surface created by the surface inclined seal portion (8) and the reverse side folded piece portion (11) which does not form a reverse side seal portion (15). The surface sealing portion (15) and the back sealing portion (16) are formed by sealing the surfaces that come into contact with the front and back surfaces (1a, 1b) and the front and back side folded pieces (10, 11), respectively, but in this figure they have a circular non-seal portion (14).

[0048] The bottom surface of the bag is formed by the surface-side folded piece (10) surrounded by the surface-side inclined sealing portion (8) and the back-side folded piece (11) which does not form a back-side sealing portion (15), and this bottom is formed with strength, making it possible to provide a bag with good stability. Therefore, because it has an inclined storage compartment, it can be stored inside the bag in a so-called vertically upright position. In this case, if grapes are stored, the tips of the grape fruits will be positioned towards the bottom, and the stems of the grapes will be positioned towards the top, allowing them to be stored vertically.

[0049] This allows the grapes to be stored in a condition similar to how they grow on the vine, and the grapes can be stored with their backs resting on the bottom of the bag, which is formed by the central arc-shaped recess that is the adhesive or fused part of the overlapping surfaces of the front folded piece (10), the back surface (1b), and the back folded piece (11), thus resting in a cushioned state. Therefore, it can be stored in a way that is similar to how grapes are placed on a hammock.

[0050] Figure 6 is a front view showing an example of a state in which grapes (G) are stored inside the self-standing bag according to the present invention shown in Figure 1. Since the grapes (G) are stored inside the bag, the weight of the grapes (G) is concentrated in the center of the bag. Therefore, the grapes (G) are neatly contained in the center of the bag by the protruding seal portion (7), which is the constricted part of the bag, and the component is placed on the bottom surface of the bag. Therefore, the grapes (G) are stored inside the bag in a sloping storage compartment at the bottom of the bag, in a so-called vertical orientation. In this configuration, the tip of the grape (G) fruit is positioned towards the bottommost point of the surface-sloping seal portion (8), and the sloping bottom surface further positions the stem portion of the grape (G) upwards, allowing it to be stored in a vertical position.

[0051] This configuration stores the grapes (G) in a state similar to how they grow on the grapevine. Furthermore, the grapes (G) can be stored with their backs resting on the bottom surface of the bag, which is formed by the central arc-shaped recess that is the adhesive or fused portion between the folded surface (10) on the front and the overlapping surface on the back. In other words, they are placed in a cushioned state. Therefore, it can be stored in a state similar to that of placing grapes (G) on a hammock.

[0052] Figure 7 is a side view showing an example of a state in which grapes (G) are stored inside the self-standing bag according to the present invention shown in Figure 6. Therefore, grapes (G) can be stored inside the bag, and they are stored in a vertical position in the sloping storage section at the bottom of the bag. In this configuration, the tip of the grape (G) fruit is positioned towards the bottommost point of the surface-sloping seal portion (8), and the sloping bottom surface further positions the stem portion of the grape (G) upwards, allowing it to be stored in a vertical position. In this state, the grapes (G) are stored in a condition similar to how they grow on the grapevine. Furthermore, the grapes can be stored with their backs resting on the bottom surface of the bag, which is formed by the central arc-shaped recess that is the adhesive or fused portion between the folded surface (10) on the front and the overlapping surface on the back. In other words, they are placed in a cushioned state.

[0053] Figure 8 shows another configuration example of Figure 4, in which the bottom of the front side of the bag has a surface seal portion (15) formed by sealing the surface (1a) and the surface-side folded piece (10), but the back side of the bag is not sealed between the back surface (1b) and the back-side folded piece (11). Therefore, a configuration that has a surface sealing portion (15) but does not have a back sealing portion may be used. Even in this way, the bag can be erected upright, and if, for example, the weight is not too heavy, the intended purpose can be achieved.

[0054] Figure 9 shows another configuration example of Figure 4, in which the bottom of the back side of the bag has a back sealing portion (16) formed by sealing the back side (1b) and the back side folded piece (11), but the front surface (1a) of the bag and the front side folded piece (10) are not sealed and only have a surface inclined sealing portion (8), and this figure shows another example of the present invention. Therefore, a configuration having a back sealing portion (16) but no front sealing portion may be used. Even in this way, the bag can be erected upright, and if, for example, the weight is not too heavy, the intended purpose can be achieved.

[0055] Figure 10 shows a configuration in which the bag body has a front sealing portion (15) and a back sealing portion (16), but this configuration does not include any unsealed portions to shorten the sealing time, and is an example of a configuration in which the entire bag is sealed. Therefore, in the present invention, a configuration without a non-sealing portion may be used.

[0056] Figure 11 similarly shows another configuration example of Figure 8, in which the bottom of the front side of the bag has a surface seal portion (15) formed by sealing the surface (1a) and the surface side folded piece (10), but the back side of the bag is constructed without sealing the back surface (1b) and the back side folded piece (11), and furthermore, without providing an unsealed portion. The above configuration may also be used.

[0057] Figure 12 shows another configuration example of Figure 9, in which the bottom of the back side of the bag body has only a back seal portion (16) formed by sealing the back side (1b) and the back side folded piece (11), but this is an example in which no non-seal portion is provided. The above configuration may also be used.

[0058] Figure 13 is a diagram showing an example of the shape of the constriction in the body of the bag structure shown in Figure 2, using different shapes of constrictions, and is a diagram showing an example of a different shape of the protruding seal portion (7). Therefore, this figure shows an example having a protruding sealing portion (7) for forming a constriction that extends deeper inward toward the inside of the bag than the constriction shown in Figure 2. Any protruding seal portion (7) facing inward towards the bag body can be formed by bending in the central part of the bag body, and the degree of bending can be arbitrarily set. It just needs to be formed in the central part of the storage section and narrow the central part of the bag body to the required position when stored.

[0059] Furthermore, this protruding sealing portion (7) is also sealed along the side edge, and the side edge sealing portion (3) and the protruding sealing portion (7) are connected. Therefore, the shape and size of the protruding seal portion (7) on the body of the bag, which narrows the width of the bag, can be adjusted as needed to narrow it to any desired internal position within the bag. Furthermore, the protruding seal portion (7) is formed by sealing the front and back surfaces of the bag body, and the seal portion is formed on the side edge.

[0060] Figure 14 shows an example of a self-standing bag according to the present invention. In this figure, the bag has a surface seal portion (15) formed by sealing the surface (1a) between the side seal portion (3), the surface inclined seal portion (8), and the bottom edge, and the surface where it meets the front folded-over piece (10). However, the sealed portion also has an unsealed portion (14). In particular, this figure shows an example in which the non-seal portion (14) is made up of a star shape rather than a circular shape. Therefore, when sealing the surface sealing portion (15), a non-seal portion (14) is formed to shorten the sealing time, etc., but the shape of this non-seal portion (14) can be determined arbitrarily. For example, the form can be arbitrarily determined, such as using various designs that are aesthetically suitable.

[0061] Figure 15 shows another example, similar to Figure 14, in which the bag body has a surface seal portion (15) formed by sealing the surface (1a) and the front folded-over piece (10) at the bottom edge between the side seal portion (3), the surface inclined seal portion (8), and the bottom edge of the bottom, but the unsealed portion (14) in the sealed portion is elliptical. In this way, an unsealed portion (14) of any shape may be formed.

[0062] Figure 16 shows an example of a bag containing cherry tomatoes according to the present invention. This diagram illustrates that while the present invention has a special configuration primarily for grapes, the same configuration can also be used to store cherry tomatoes, vegetables, or fruits.

[0063] For example, the protruding seal portion (7) allows the center of gravity of the stored items to be directed towards the center of the bag, and the shape of the bottom and other components make it easier to see the contents from the front, enabling an attractive display when displayed and sold in stores, etc. Furthermore, the surface sealing portion (15) and the back sealing portion (16) around the bottom allow the bag to maintain its uprightness when sealed inside the bag, making it suitable for display and sale. [Explanation of Symbols]

[0064] 1 bag body 1a surface 1b back side 2 openings 3. Side sealing portion 4 Bottom 5. Folded part of the bag 6. Handle section 7. Protruding seal portion 8. Surface inclined sealing portion 10. Folded-over flap on the surface side 11. Folded flap on the reverse side 14 Non-sealed portion 15 Surface sealing portion 16. Backside seal area G Grapes

Claims

1. A bag made by folding a single sheet, having a front and back surface and a bottom made up of the fold, Both sides of the bag body are formed by side sealing portions (3), The bottom of the bag is an upright bag having a folded bottom on both the front and back surfaces. The surface of the bag body (1a) and the surface of the folded-over piece (10) have a surface-inclined sealing portion (8) at the contact surface. The surface inclined sealing portion (8) is a sealing portion formed at an angle toward the inside of the bag from the side sealing portions (3) on both sides of the bag, and is an inclined sealing portion formed at an angle toward the bottom of the bag from the side sealing portions (3) on both sides of the bag at an arbitrary position toward the bottom of the bag, rather than the folded portion (5) position inside the bag. The side of the bag body has a protruding seal portion (7) that forms a constriction in the central part of the body of the bag body, extending inward. A self-standing bag characterized by having a back sealing portion (16) that seals the contact surface between the back surface (1b) of the bottom of the back surface of the bag body and the back side folded flap portion (11).

2. A bag made by folding a single sheet, having a front and back surface and a bottom made up of the fold, Both sides of the bag are formed by sealing portions. The bottom of the bag is an upright bag having a folded bottom on both the front and back surfaces. The surface of the bag body (1a) and the surface of the folded-over piece (10) have a surface-inclined sealing portion (8) at the contact surface. The surface inclined sealing portion (8) is a sealing portion formed at an angle toward the inside of the bag from the side sealing portions (3) on both sides of the bag, and is an inclined sealing portion formed at an angle toward the bottom of the bag from the side sealing portions (3) on both sides of the bag at an arbitrary position toward the bottom of the bag, rather than the folded portion (5) position inside the bag. The side of the bag body has a protruding seal portion (7) that forms a constriction in the central part of the body of the bag body, extending inward. A self-standing bag characterized by having a surface seal portion (15) that seals the surface (1a) of the bag body, which is surrounded by the side seal portion (3) of the surface of the bag body, the surface inclined seal portion (8) and the bottom of the bag body, and the surface that comes into contact with the surface folded piece portion (10).

3. A bag made by folding a single sheet, having a front and back surface and a bottom made up of the fold, Both sides of the bag body are formed by side sealing portions (3), The bottom of the bag is an upright bag having a folded bottom on both the front and back surfaces. The surface of the bag body (1a) and the surface of the folded-over piece (10) have a surface-inclined sealing portion (8) at the contact surface. The surface inclined sealing portion (8) is a sealing portion formed at an angle toward the inside of the bag from the sealing portions (3) on both sides of the bag, and is an inclined sealing portion formed at an angle toward the bottom of the bag from the side sealing portions (3) on both sides of the bag at an arbitrary position toward the bottom of the bag, rather than the folded portion (5) position inside the bag. The side of the bag body has a protruding seal portion (7) that forms a constriction in the central part of the body of the bag body, extending inward. The bag body has a back sealing portion (16) that seals the contact surface between the back surface (1b) of the bottom of the back surface and the back side folded piece (11). A self-standing bag characterized by having a surface seal portion (15) that seals the surface (1a) of the bag body, which is surrounded by the side seal portion (3) of the surface of the bag body, the surface inclined seal portion (8) and the bottom of the bag body, and the surface that comes into contact with the surface folded piece portion (10).

4. The self-standing bag according to claim 1 or claim 3, characterized in that the back seal portion (16) which seals the contact surface between the back surface (1b) of the bottom of the back surface of the bag body and the back side folded flap portion (11) has an unsealed portion (14) on both sides.

5. The self-standing bag according to claim 2 or 3, characterized in that the surface seal portion (15) that seals the surface of the bag (1a) surrounded by the side seal portion (3) of the surface of the bag body, the surface inclined seal portion (8) and the bottom of the bag body, and the surface seal portion (15) that seals the surface where it comes into contact with the surface folded piece portion (10), has an unsealed portion (14) on both sides.

6. The self-standing bag according to claim 1 or claim 3, characterized in that the back sealing portion (16) that seals the surface in contact with the back surface (1b) of the bottom of the back of the bag body and the surface of the back side folded piece (11) is formed by sealing the surface that is in contact with the bottom of the bag body, with the upper edge of the back sealing portion (16) being formed by sealing the surface that is in contact with the bottom of the bag body.

7. A self-standing bag according to any one of claims 1 to 3, characterized in that it is bonded with an adhesive member instead of a seal.

8. The self-standing bag according to claim 4, characterized in that multiple or numerous non-sealed portions (14) are formed at arbitrary positions on the sealed portion.

9. The self-standing bag according to claim 5, characterized in that multiple or numerous non-sealed portions (14) are formed at arbitrary positions on the sealed portion.

10. The self-standing bag according to claim 8, wherein the non-seal portion (14) is formed in a circular or oval shape.

11. The self-standing bag according to claim 8, wherein the non-seal portion (14) is formed in a star shape.

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