Sheet material container

Abstract

To provide a sheet material container with a structure that can maintain its shape better.SOLUTION: A sheet material container 100 of the invention comprises a container body 20, which is constituted by a body-constituting sheet material 21 and encloses the containment area 17, the container body 20 having a front portion 20a and a first side portion 20c, the body-constituting sheet material 21 having a non-joining portion 24 and a filling portion 60 which can fill a filler material between the outer film layer 22 and the inner film layer 23 in the non-joining portion 24. The filling portion 60 has: a vertically extending portion extending vertically along the boundary between the front portion 20a and the first side portion 20c; a first protrusion 65a protruding from the vertically extending portion toward the center in the transverse width direction of the front part 20a; and a second projection 65b projecting from the vertically extending portion toward the center in the width direction of the first side 20c.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a sheet material container. [Background technology]

[0002] A sheet material container having a structure in which multiple films are laminated and a filler such as air is enclosed between the layers is described, for example, in Patent Document 1. The sheet material container of Patent Document 1 includes a container having a storage area for storing contents, a bag body covering the container, and a bag body-constituting sheet material that constitutes the bag body. The sheet material constituting the bag body includes a joint portion where the multiple film layers are joined together and a non-joined portion where the multiple film layers are partially not joined together, and a filling portion is formed by sealing a filler between the multiple film layers in the non-joined portion. A part of the filling portion is disposed on the front portion of the container and is formed in a circular shape along the peripheral portion of the front portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6193535 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the investigations of the present inventors, there is still room for improvement in the sheet material container of Patent Document 1 with respect to the concept of maintaining the shape of the sheet material container.

[0005] The present invention relates to a sheet material container having a structure capable of better maintaining the shape of the sheet material container. [Means for solving the problem]

[0006] The present invention relates to a sheet material container that is constructed with one or more sheet materials including a main body constituent sheet material having an outer film layer and an inner film layer laminated to each other, the sheet material container comprising: a storage area for storing contents; and a container body that is constructed with the main body constituent sheet material and surrounds the storage area, the container body having a body and a bottom, the main body constituent sheet material having a front side constituent sheet part that constitutes the front side of the body, a back side constituent sheet part that constitutes the back side of the body, and a bottom surface constituent sheet part that constitutes the bottom, the container body being constructed including a front part constituted by a central part in the width direction of the front side constituent sheet part, and a first cross section that includes a portion of the front side constituent sheet part adjacent to one side of the front part and that intersects with the front part. the sheet material container has a main body sealing portion where the outer film layer and the inner film layer are joined, and a non-joined portion where the outer film layer and the inner film layer are partially non-joined, and has a filling portion in which a filler can be enclosed between the outer film layer and the inner film layer in the non-joined portion, the filling portion having a vertical extending portion extending vertically along the boundary between the front portion and the first side portion, a first protruding portion at a vertical intermediate portion of the front portion from the vertical extending portion toward a center portion in the width direction of the front portion, and a second protruding portion at a vertical intermediate portion of the first side portion from the vertical extending portion toward the center portion in the width direction of the first side portion. Effect of the Invention

[0007] According to the present invention, the shape of the sheet material container can be maintained better. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view of the sheet material container after a filler is filled therein according to the first embodiment. [Diagram 2] FIG. 2 is a front view of the sheet material container after a filler is filled according to the first embodiment. [Diagram 3]FIG. 4 is a rear view of the sheet material container after the filler is filled according to the first embodiment. [Figure 4] FIG. 2 is a side view of the sheet material container after a filler is filled according to the first embodiment. [Diagram 5] FIG. 4 is a bottom view of the sheet material container after the filler is filled according to the first embodiment. [Figure 6] FIG. 2 is an exploded perspective view showing an outer film layer and an inner film layer of the sheet material constituting the main body. [Figure 7] FIG. 2 is an exploded perspective view showing the sheet material constituting the inner bag and the sheet material constituting the main body. [Figure 8] FIG. 2 is a plan view showing a container-constituting sheet material having an inner bag-constituting sheet material and a main body-constituting sheet material laminated together. [Figure 9] FIG. 11 is a front view of a sheet material container after a filler is filled according to the second embodiment. [Figure 10] FIG. 11 is a side view of the sheet material container after the filler is filled according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same components are designated by the same reference numerals, and duplicated descriptions will be omitted as appropriate.

[0010] [First embodiment] First, the first embodiment will be described with reference to FIGS. As shown in Figures 1 and 2, the sheet material container 100 of this embodiment is a sheet material container constructed with one or more sheet materials including a main body constituent sheet material 21 having an outer film layer and an inner film layer laminated to each other, and is equipped with a storage area 17 for storing contents (not shown), and a container body 20 constructed with the main body constituent sheet material 21 and surrounding the storage area 17. The container body 20 has a body portion 11 and a bottom portion 13 . The main body constituent sheet material 21 has a front side constituent sheet portion 31 that constitutes the front side of the torso portion 11, a back side constituent sheet portion 32 that constitutes the back side of the torso portion 11, and a bottom side constituent sheet portion 33 that constitutes the bottom portion 13. The container body 20 has a front portion 20a formed by the central portion in the width direction of the front side constituent sheet portion 31, and a first side portion 20c formed including a portion of the front side constituent sheet portion 31 adjacent to one side of the front portion 20a and intersecting the front portion 20a. The main body constituent sheet material 21 has a main body seal portion 26 where the outer film layer 22 and the inner film layer 23 are joined, and a non-joined portion 24 where the outer film layer 22 and the inner film layer 23 are partially unjoined, as well as a filling portion 60 in which a filler can be enclosed between the outer film layer 22 and the inner film layer 23 in the non-joined portion 24. The filling portion 60 has an upper and lower extending portion (first upper and lower extending portion 60a in this embodiment) extending vertically along the boundary between the front portion 20a and the first side portion 20c, a first protruding portion 65a protruding from the upper and lower extending portion toward the center in the width direction of the front portion 20a at a vertical intermediate portion of the front portion 20a, and a second protruding portion 65b protruding from the upper and lower extending portion toward the center in the width direction of the first side portion 20c at a vertical intermediate portion of the first side portion 20c. In this case, the "middle part in the vertical direction of the front part 20a" refers to, for example, at least a part between the upper end and the lower end of the front part 20a (see H in FIG. 2). Preferably, the "middle part in the vertical direction of the front part 20a" refers to, for example, the center part of the front part 20a, and the center part refers to a middle region among three equal parts of the front part 20a in the height direction (see 1 / 3H in FIG. 2). In addition, here, "the center in the width direction of the front portion 20a" means, for example, the center of the front portion 20a in the left-right direction, and means the middle area of ​​the front portion 20a divided into three equal parts in the left-right direction. In addition, here, "the center portion in the width direction of the first side portion 20c" means, in this embodiment, the center portion of the first side portion 20c in the front-to-back direction, that is, the middle area of ​​the first side portion 20c divided into three equal parts in the front-to-back direction.

[0011] According to this embodiment, the sheet material container 100 has a structure having a filling portion 60 (first protrusion 65a and second protrusion 65b) extending in the lateral direction of the front portion 20a and the width direction of the first side portion 20c near the middle portion in the vertical direction of the front portion 20a and the first side portion 20c. As a result, even if the contents stored in the storage area 17 are reduced, the first protrusion 65a and the second protrusion 65b can satisfactorily maintain the state in which the front portion 20a and the first side portion 20c cross each other. In other words, deformation (crush) of the sheet material container 100 caused by the reduction in the contents stored in the storage area 17 can be suppressed, so that the shape of the sheet material container 100 can be more satisfactorily maintained. Moreover, since deformation (crushing) of the sheet material container 100 can be suppressed, the sheet material container 100 can be made to stand upright. Furthermore, the sheet material container 100 has a front side vertical extension portion 61a and a first side surface side vertical extension portion 61b that extend vertically in parallel with each other along the boundary between the front surface portion 20a and the first side surface portion 20c. As a result, the front side vertical extension portion 61a and the first side surface side vertical extension portion 61b can improve the deformation resistance of the sheet material container 100 against forces applied in the vertical direction, so that even if the sheet material container 100 receives an impact due to being dropped, for example, deformation (crushing) of the sheet material container 100 can be suppressed.

[0012] In the present embodiment, the container body 20 further includes a second side surface portion 20d that intersects with the front surface portion 20a, as described later. The filling portion 60 includes a second vertical extension portion 60b that extends vertically in parallel with each other along the boundary between the front surface portion 20a and the second side surface portion 20d, a third protrusion portion 65c that protrudes from the second vertical extension portion 60b toward the center in the width direction of the front surface portion 20a at the vertical intermediate portion of the front surface portion 20a, and a fourth protrusion portion 65d that protrudes from the second vertical extension portion 60b toward the center in the width direction of the second side surface portion 20d at the vertical intermediate portion of the second side surface portion 20d. According to this configuration, the sheet material container 100 has a structure having a filling portion 60 (first protrusion 65a to fourth protrusion 65d) extending in the width direction of the front portion 20a, the width direction of the first side portion 20c, and the width direction of the second side portion 20d near the middle portion in the up-down direction of the front portion 20a, the first side portion 20c, and the second side portion 20d. As a result, even if the contents stored in the storage area 17 are reduced, the first protrusion 65a to the fourth protrusion 65d can satisfactorily maintain the state in which the front portion 20a and the first side portion 20c cross each other, and the state in which the front portion 20a and the second side portion 20d cross each other. In other words, deformation (crush) of the sheet material container 100 caused by the reduction in the contents stored in the storage area 17 can be more reliably suppressed. Here, "the center portion in the width direction of the second side portion 20d" means, for example, the center portion of the second side portion 20d in the front-to-back direction, and means the middle area of ​​the second side portion 20d divided into three equal parts in the front-to-back direction.

[0013] In the present invention, the type of contents is not particularly limited. Examples of the contents include shampoo, conditioner, body soap, detergent, bleach, fabric softener, beverages, food, engine oil, chemicals, etc. The contents may be liquid (including paste-like), solid (for example, granular (including granular) or powdery). In this embodiment, the content is, for example, a liquid. When the content is a liquid, the viscosity of the content is, for example, at 30°C, preferably 1 mPa s or more and 120,000 mPa s or less (measured with a B-type viscometer, such as Viscometer TV-10 or Viscometer TVB-10 manufactured by Toki Sangyo Co., Ltd.), and more preferably 1 mPa s or more and 60,000 mPa s or less.

[0014] The container body 20 is formed in a bag shape having, for example, a body 11, a top gusset 14 disposed on the upper side of the body 11, and a bottom 13 disposed on the lower side of the body 11. However, the present invention is not limited to this example, and the container body 20 does not have to have the top gusset 14.

[0015] The container body 20 surrounds the storage area 17. In this embodiment, the container body 20 surrounds the inner bag 40. That is, in this embodiment, the sheet material container 100 includes the inner bag 40 disposed inside the container body 20, and the inner bag 40 has the storage area 17. The inner bag 40 is formed of an inner bag constituent sheet material 41 which is the innermost sheet material among one or more sheet materials. The container body 20 constitutes the outer shell of the sheet material container 100. Hereinafter, the body 11, the top gusset 14, and the bottom 13 of the container body 20 may be referred to as the body 11, the top gusset 14, and the bottom 13 of the sheet material container 100. The sheet material container 100 can stand on its own with the bottom 13 placed on a horizontal placement surface. More specifically, the bottom 13 has, for example, a grounding surface 13a (bottom gusset) that touches the ground when the sheet material container 100 is placed on the horizontal placement surface and stands on its own. In the present invention, the entire surface of the ground 13a is not necessarily in contact with the placement surface, and for example, a part of the ground 13a may be floating above the placement surface. The ground 13a is an area inside an envelope that envelops all the points that contact the placement surface in the shortest distance. More specifically, as shown in FIG. 8, the ground 13a is a part of the bottom sheet part 33 closer to the center than the boundary line (corresponding to the folding line 81 described later) between the front sheet part 31 and the bottom sheet part 33 and the boundary line (corresponding to the folding line 82 described later) between the back sheet part 32 and the bottom sheet part 33, and is located inside the outline of the bottom part 13 in plan view. As shown in FIGS. 2 and 3, the periphery of the bottom part 13 rises outward, so it typically does not become the ground 13a.

[0016] In this embodiment, unless otherwise specified, the positional relationship (upper and lower relationships, etc.) of each component of the sheet material container 100 is described with the sheet material container 100 standing upright as shown in Figures 1 and 2. However, the positional relationship in these descriptions does not necessarily match the positional relationship when the sheet material container 100 is in use or manufactured. Further, the positional relationship of each component of the sheet material container 100 will be explained based on the positional relationship shown in each drawing. The front side of the sheet material container 100 (the near side of the paper in FIG. 2) is referred to as the front, the back side of the sheet material container 100 (the far side of the paper in FIG. 2) is referred to as the rear, the left side when facing the front of the sheet material container 100 (the left side in FIG. 2) is referred to as the left side, and the right side when facing the front of the sheet material container 100 (the right side in FIG. 2) is referred to as the right side. The left-right direction of the sheet material container 100 may also be referred to as the width direction.

[0017] The container body 20 has, for example, a substantially polygonal prism shape. As a result, the side circumferential surface of the container body 20 has a structure having three or more planar portions, so that the sheet material container 100 can have more surfaces on which a marking portion (not shown) and a pattern or the like can be printed. This allows for greater freedom in designing the appearance of the sheet material container 100. Also, the internal volume of the storage area 17 can be sufficiently secured. In this embodiment, as shown in Figures 1 and 2, the container body 20 has, as an example, three pairs of opposing surfaces, and has an approximately rectangular parallelepiped shape (approximately square prism shape) in which adjacent surfaces are approximately perpendicular to each other. Therefore, when multiple sheet material containers 100 are arranged side by side, the gap between adjacent sheet material containers 100 can be made smaller. This makes it possible to transport more sheet material containers 100 at one time and store multiple sheet material containers 100 more compactly. More specifically, the planar cross-sectional shape of the container body 20 is, for example, approximately square. The planar portion herein means a region surrounded by a plurality of corners, and in this embodiment, each of the planar portions is surrounded by four corners.

[0018] More specifically, the container body 20 has, for example, a front portion 20a, a first side portion 20c, a bottom portion 13 and a top gusset 14, as well as a back portion 20b formed by the central portion in the width direction of the back side constituent sheet portion 32, and a second side portion 20d formed including a portion of the front side constituent sheet portion 31 adjacent to the other side of the front portion 20a and intersecting with the front portion 20a. The first side surface portion 20c is configured to further include a portion adjacent to one side of the back surface portion 20b in the back surface side constituent sheet portion 32, and intersects with the back surface portion 20b. The second side surface portion 20d is configured to further include a portion adjacent to the other side of the back surface portion 20b in the back surface side constituent sheet portion 32, and intersects with the back surface portion 20b. However, in the present invention, the container body 20 is not limited to a substantially rectangular parallelepiped shape, and may be a polygonal prism shape, such as a substantially triangular prism shape or a substantially pentagonal prism shape.

[0019] 3, the body 11 is a generally rectangular tube having four planar portions, namely, a front portion 20a, a first side portion 20c, a back portion 20b, and a second side portion 20d. The width dimension (left-right dimension) of the front portion 20a, the width dimension (front-rear dimension) of the first side portion 20c, the width dimension (left-right dimension) of the back portion 20b, and the width dimension (front-rear dimension) of the second side portion 20d are set to be generally equal to each other, for example. The front portion 20a and the rear portion 20b face each other in the front-rear direction so as to be substantially parallel to each other with the storage area 17 therebetween. The front portion 20a is located on the front side, and the rear portion 20b is located on the rear side. The first side surface portion 20c and the second side surface portion 20d face each other in the left-right direction so as to be substantially parallel to each other with the storage area 17 therebetween. The first side surface portion 20c is located on the left side, and the second side surface portion 20d is located on the right side. The front edge of the first side portion 20c is connected to the left edge of the front portion 20a, and the rear edge of the first side portion 20c is connected to the left edge of the rear portion 20b. The front edge of the second side portion 20d is connected to the right edge of the front portion 20a, and the rear edge of the second side portion 20d is connected to the right edge of the rear portion 20b. That is, the first side portion 20c connects the left edge of the front portion 20a to the left edge of the rear portion 20b. The second side portion 20d connects the right edge of the front portion 20a to the right edge of the rear portion 20b. The top gusset 14 and the bottom 13 face each other in the vertical direction with the storage area 17 therebetween. The front edge of the top gusset 14 is connected to the upper edge of the front portion 20a. The rear edge of the top gusset 14 is connected to the upper edge of the back portion 20b. The front edge of the bottom portion 13 is connected to the lower edge of the front portion 20a, and the rear edge of the bottom portion 13 is connected to the lower edge of the back portion 20b. In other words, the top gusset 14 connects the upper edge of the front portion 20a to the upper edge of the back portion 20b, and also connects the upper edge of the first side portion 20c to the upper edge of the second side portion 20d. The top gusset 14 is provided with a discharge port for discharging the contents from the storage area 17. The bottom portion 13 connects the lower edge of the front portion 20a to the lower edge of the back portion 20b, and also connects the lower edge of the first side portion 20c to the lower edge of the second side portion 20d.

[0020] The front portion 20a and the rear portion 20b are, for example, substantially rectangular in shape when viewed in the front-rear direction. Similarly, the first side portion 20c and the second side portion 20d are, for example, substantially rectangular in shape when viewed in the left-right direction. The front portion 20a and the rear portion 20b are, for example, symmetrical to each other in the front-rear direction. The first side portion 20c and the second side portion 20d are, for example, symmetrical to each other in the left-right direction. The planar shape of the top gusset 14 is not particularly limited, but in this embodiment, the top gusset 14 is formed in a substantially rectangular shape. Similarly, the planar shape of the bottom 13 is not particularly limited, but in this embodiment, the bottom 13 is formed in a substantially rectangular shape.

[0021] In this embodiment, the first side portion 20c is composed of a portion located on one side of the front portion 20a in the front side constituent sheet portion 31 and a portion located on one side of the back portion 20b in the back side constituent sheet portion 32. The second side surface portion 20d is composed of a portion of the front side constituent sheet portion 31 located on the other side of the front portion 20a, and a portion of the rear side constituent sheet portion 32 located on the other side of the rear portion 20b.

[0022] The container body 20 also has, for example, a first edge portion 16a which is the boundary between the front portion 20a and the first side portion 20c, a second edge portion 16b which is the boundary between the front portion 20a and the second side portion 20d, a third edge portion 16c which is the boundary between the back portion 20b and the first side portion 20c, and a fourth edge portion 16d which is the boundary between the back portion 20b and the second side portion 20d. Each of the first side portion 16a to the fourth side portion 16d includes, for example, a concave surface and extends between two corners shared by the two planar portions. More specifically, the majority of the longitudinal direction of each of the first side portion 16a to the fourth side portion 16d is a non-filled portion 67 that is not a filled portion 60, and the non-filled portion 67 is a concave surface. As a result, the first side portion 16a to the fourth side portion 16d have a chamfered shape, so that the sheet material container 100 can be gripped with an improved feeling.

[0023] In this embodiment, the first side surface portion 20c and the second side surface portion 20d are symmetrical to each other. More specifically, as shown in FIG. 1, the container body 20 has a first side edge seal portion 46 in which one side edge 31a of the front side constituent sheet portion 31 and one side edge 32a of the rear side constituent sheet portion 32 are indirectly or directly joined, a first front lower edge seal portion 48a in which one side edge of the half portion 33a of the bottom constituent sheet portion 33 on the front side constituent sheet portion 31 side and one side edge 31a of the front side constituent sheet portion 31 are indirectly or directly joined, and a first rear lower edge seal portion 49a in which one side edge of the half portion 33b of the bottom constituent sheet portion 33 on the rear side constituent sheet portion 32 side and one side edge 32a of the rear side constituent sheet portion 32 are indirectly or directly joined. Furthermore, the container body 20 has a second side edge seal portion 47 in which the other side edge 31b of the front side constituent sheet portion 31 and the other side edge 32b of the back side constituent sheet portion 32 are indirectly or directly joined, a second front lower side edge seal portion 48b in which the other side edge of the half portion 33a of the bottom constituent sheet portion 33 on the front side constituent sheet portion 31 side and the other side edge 31b of the front side constituent sheet portion 31 are indirectly or directly joined, and a second back lower side edge seal portion 49b in which the other side edge of the half portion 33b of the bottom constituent sheet portion 33 on the back side constituent sheet portion 32 side and the other side edge 32b of the back side constituent sheet portion 32 are indirectly or directly joined.

[0024] As shown in Fig. 4, the first side edge seal portion 46 is disposed, for example, at the center in the width direction of the first side surface portion 20c. Similarly, as shown in Fig. 1, the second side edge seal portion 47 is disposed at the center in the width direction of the second side surface portion 20d. This makes it less likely that the first side edge seal portion 46 and the second side edge seal portion 47 will come into contact with the palm of the user's hand when the sheet material container 100 is gripped, thereby improving the grippability of the sheet material container 100.

[0025] Furthermore, the container body 20 includes a top gusset peripheral seal portion 45 disposed along the peripheral edge of the top gusset 14. The top gusset peripheral seal portion 45 surrounds the top gusset 14 in a circumferential manner, for example. The first side edge seal portion 46, the second side edge seal portion 47 and the top gusset peripheral seal portion 45 stand up, for example, toward the outside of the container body 20. The dimensions of the first side edge seal portion 46, the second side edge seal portion 47 and the top gusset peripheral seal portion 45 in a direction perpendicular to the extension direction of the first side edge seal portion 46, the second side edge seal portion 47 and the top gusset peripheral seal portion 45 (the width dimensions of the first side edge seal portion 46, the second side edge seal portion 47 and the top gusset peripheral seal portion 45) are, for example, approximately constant. The first side edge seal portion 46 , the second side edge seal portion 47 and the top gusset peripheral seal portion 45 comprise the main body seal portion 26 that joins the outer film layer 22 and the inner film layer 23 .

[0026] The container body 20 is constructed by folding the body-constituting sheet material 21 (see Figures 6 and 8) and joining portions of the peripheral edges of the body-constituting sheet material 21 to each other (in this embodiment, they are joined to each other via the inner bag-constituting sheet material 41 that constitutes the inner bag 40).

[0027] In this embodiment, the inner bag 40 is formed by joining parts of the peripheral edges of the inner bag forming sheet material 41 (see FIG. 7 ). That is, the inner bag forming sheet material 41 is folded and the peripheral edges of the inner bag forming sheet material 41 are joined to each other to form the bag-shaped inner bag 40. The inner bag 40 is covered by the container body 20. The inner bag 40 has a storage area 17 inside the inner bag 40. However, in the present invention, when the inner container defining the storage area 17 is arranged inside the container body 20, the inner container is not limited to an inner bag 40 made of a sheet material, but may be, for example, one made by blow molding.

[0028] The shape of the inner bag 40 is not particularly limited, but in this embodiment, the inner bag 40 is formed in the same shape as the container body 20. The inner bag 40 has a first main surface portion (not shown) located on the front side and a second main surface portion (not shown) located on the rear side, with the storage area 17 sandwiched therebetween.

[0029] The sheet material container 100 includes, for example, a spout 15 provided on a top gusset 14 (top surface portion) and a cap portion 70 attached (for example, detachably attached) to the spout 15. The spout 15 is provided penetrating the top gusset 14. More specifically, as shown in FIG. 2, spout 15 has a tube portion 15a having a spout 15c, and a flange portion 15b protruding from the base end of tube portion 15a to the outer periphery. The tube portion 15a is formed in a cylindrical shape. A screw thread is formed on the outer peripheral surface of tube portion 15a, and tube portion 15a has a male screw shape. The tube portion 15a penetrates top gusset 14 from top to bottom, and protrudes upward from top gusset 14. The flange portion 15b is provided at one end (lower end) of tube portion 15a in the axial direction in a position perpendicular to the axial direction. The flange portion 15b is provided, for example, on the inner or outer surface of the inner bag-constituting sheet material 41 in a portion that is disposed along the top gusset 14 of the body portion 11. The lower surface of the flange portion 15b is joined, for example, to the inner surface of the inner bag-constituting sheet material 41 at the top gusset 14. However, the present invention is not limited to this example, and the flange portion 15b may be directly joined to the inner film layer 23 of the main body-constituting sheet material 21. The opening at the tip of the cylindrical portion 15a is a spout 15c for discharging the contents from the containing area 17.

[0030] The cap portion 70 includes, for example, an attachment portion 71 which is a cylindrical portion having an internal thread shape that is detachably screwed onto the cylindrical portion 15a, a pump portion 72 fixed to the attachment portion 71, a dip tube 77 extending downward from the pump portion 72, and a head portion 73 held by the pump portion 72 so as to be movable up and down relative to the pump portion 72. The head portion 73 has, for example, a support tube portion 74 protruding upward from the pump portion 72, and a nozzle portion 75 protruding horizontally from the upper end of the head portion 73, and an outlet 76 for discharging the contents is formed at the tip of the nozzle portion 75. A flow path (not shown) for the contents within the cap portion 70 is disposed so as to pass through the spout 15 from top to bottom. In the case of this embodiment, as an example, when the head portion 73 is pushed (pressed) downward relative to the pump portion 72, the pump portion 72 acts to discharge the contents from the discharge port . As described above, in the present embodiment, the first vertical extension portion 60a can further improve the deformation resistance of the sheet material container 100 against a force applied in the vertical direction. Therefore, even if the head portion 73 is pressed against the pump portion 72, deformation (crushing) of the sheet material container 100 can be suppressed. However, for example, the contents may be discharged from the discharge port 76 by pressing the pump portion 72 horizontally.

[0031] In this embodiment, the filling portion 60 formed on the front portion 20a and the filling portion 60 formed on the back portion 20b are symmetrical to each other in the front-rear direction. Similarly, the filling portion 60 formed on the first side portion 20c and the filling portion 60 formed on the second side portion 20d are symmetrical to each other in the left-right direction. More specifically, the filling portion 60 has, in addition to the first vertical extension portion 60a, a second vertical extension portion 60b extending vertically along the boundary between the front portion 20a and the second side portion 20d, a third vertical extension portion 60c extending vertically along the boundary between the back portion 20b and the first side portion 20c, and a fourth vertical extension portion 60d extending vertically along the boundary between the back portion 20b and the second side portion 20d. More specifically, the first vertical extension portion 60a has, for example, a front vertical extension portion 61a disposed on the front portion 20a and extending vertically, and a first side surface side vertical extension portion 61b disposed on the first side surface portion 20c and extending vertically. The front vertical extension portion 61a and the first side surface side vertical extension portion 61b extend vertically in parallel with each other along the boundary between the front portion 20a and the first side surface portion 20c. This allows the front portion 20a and the first side portion 20c to each have projections and recesses (first upper and lower extending portions 60a) that serve as finger hook portions (hereinafter referred to as finger hook portions) that allow the container body 20 to be easily gripped, thereby improving the grippability of the sheet material container 100. Similarly, the second vertical extension portion 60b has, for example, a front vertical extension portion 61c disposed on the front portion 20a and extending vertically, and a second side surface vertical extension portion 61d disposed on the second side surface portion 20d and extending vertically. The front vertical extension portion 61c and the second side surface vertical extension portion 61d extend vertically in parallel with each other along the boundary between the front portion 20a and the second side surface portion 20d. The third vertical extending portion 60c has, for example, a rear vertical extending portion 62a disposed on the rear portion 20b and extending vertically, and a first side surface side vertical extending portion 62b disposed on the first side surface portion 20c and extending vertically. The rear vertical extending portion 62a and the first side surface side vertical extending portion 62b extend vertically in parallel with each other along the boundary between the rear portion 20b and the first side surface portion 20c. The fourth vertical extension portion 60d has, for example, a rear vertical extension portion 62c disposed on the rear portion 20b and extending vertically, and a second side surface side vertical extension portion 62d disposed on the second side surface portion 20d and extending vertically. The rear vertical extension portion 62c and the second side surface side vertical extension portion 62d extend vertically in parallel with each other along the boundary between the rear portion 20b and the second side surface portion 20d. As a result, corresponding upper and lower extending portions (first upper and lower extending portions 60a to fourth upper and lower extending portions 60d) are formed on the four planar portions of the front portion 20a, the back portion 20b, the first side portion 20c, and the second side portion 20d, thereby further improving the deformation resistance of the sheet material container 100 against forces applied in the vertical direction. In addition, the front portion 20a, the back portion 20b, the first side surface portion 20c, and the second side surface portion 20d each have projections and recesses (the first vertical extension portion 60a to the fourth vertical extension portion 60d) that serve as finger hooks, so that the fingers can be easily hooked on the finger hooks regardless of the size of the user's palm. This further improves the gripping ability of the sheet material container 100. Here, "parallel" does not necessarily mean parallel, and for example, two adjacent upper and lower extending portions may extend in a substantially V-shape relative to each other.

[0032] As shown in FIGS. 2 and 4, the front side vertical extension portion 61a and the first side surface side vertical extension portion 61b extend vertically in parallel to each other along the first edge portion 16a, for example. As shown in FIG. 2, the front side vertical extension portion 61c and the second side surface side vertical extension portion 61d extend vertically in parallel to each other along the second edge portion 16b, for example. As shown in FIG. 3, the rear surface side vertical extension portion 62a and the first side surface side vertical extension portion 62b extend vertically in parallel to each other along the third side portion 16c, for example. The rear surface side vertical extension portion 62c and the second side surface side vertical extension portion 62d extend vertically in parallel to each other along the fourth side portion 16d, for example.

[0033] In this way, the sheet material container 100 has a structure including a pair of vertical extending portions (the first vertical extending portion 60a to the fourth vertical extending portion 60d) extending vertically in parallel to each other along the corresponding side portions, so that the deformation resistance of the sheet material container 100 against a force applied in the vertical direction can be further improved. Therefore, even if an impact is applied to the sheet material container 100 due to being dropped, the deformation (crushing) of the sheet material container 100 can be more reliably suppressed. Furthermore, since the filling section 60 is arranged on each of the first side portion 20c and the second side portion 20d, even if a force is applied in the vertical direction to the sheet material container 100 due to being dropped, etc., the sheet material container 100 can be prevented from being deformed (crushed) in the left-right direction.

[0034] Here, the upper ends of the front side vertical extending portion 61a and the first side surface vertical extending portion 61b are located above the intersection 46b with the first front surface lower edge seal portion 48a, the first back surface lower edge seal portion 49a, and the first side edge seal portion 46. Also, the lower ends of the front side vertical extending portion 61a and the first side surface vertical extending portion 61b are located below the intersection 46b with the first front surface lower edge seal portion 48a, the first back surface lower edge seal portion 49a, and the first side edge seal portion 46. According to this structure, even if the sheet material container 100 is subjected to an impact due to a drop or the like, the front side vertical extension portion 61a and the first side surface vertical extension portion 61b can mitigate the impact applied to the intersection 46b of the first front lower edge seal portion 48a, the first back lower edge seal portion 49a, and the first edge seal portion 46. This makes it possible to satisfactorily maintain a state in which one side edge 31a of the front side constituent sheet portion 31 is joined to one side edge 32a of the back side constituent sheet portion 32, a state in which one side edge of the half portion 33a of the bottom constituent sheet portion 33 on the front side constituent sheet portion 31 side is joined to one side edge 31a of the front side constituent sheet portion 31, and a state in which one side edge of the half portion 33b of the bottom constituent sheet portion 33 on the back side constituent sheet portion 32 side is joined to one side edge 32a of the back side constituent sheet portion 32. Similarly, the upper ends of the front side vertical extending portion 61c and the second side surface vertical extending portion 61d are located above the intersection 47b with the second front surface lower edge seal portion 48b, the second back surface lower edge seal portion 49b, and the second edge seal portion 47. In addition, the lower ends of the front side vertical extending portion 61c and the second side surface vertical extending portion 61d are located below the intersection 47b with the second front surface lower edge seal portion 48b, the second back surface lower edge seal portion 49b, and the second edge seal portion 47. As a result, even if the sheet material container 100 is subjected to an impact due to a drop or the like, the front side vertical extension portion 61c and the second side surface vertical extension portion 61d can mitigate the impact applied to the intersection 47b of the second front lower edge seal portion 48b, the second back lower edge seal portion 49b, and the second edge seal portion 47. As a result, the state in which the other side edge 31b of the front side constituent sheet portion 31 is joined to the other side edge 32b of the back side constituent sheet portion 32, the state in which the other side edge of the half portion 33a of the bottom constituent sheet portion 33 on the front side constituent sheet portion 31 side is joined to the other side edge 31a of the front side constituent sheet portion 31, and the state in which the other side edge of the half portion 33b of the bottom constituent sheet portion 33 on the back side constituent sheet portion 32 side is joined to the other side edge 32a of the back side constituent sheet portion 32 can be well maintained.

[0035] Additionally, the upper ends of the rear side vertical extending portion 62a and the first side surface side vertical extending portion 62b are located above the intersection 46b with the first front lower edge seal portion 48a, the first rear lower edge seal portion 49a, and the first edge seal portion 46. The lower ends of the rear side vertical extending portion 62a and the first side surface side vertical extending portion 62b are located below the intersection 46b with the first front lower edge seal portion 48a, the first rear lower edge seal portion 49a, and the first edge seal portion 46. Similarly, the upper ends of the rear side vertical extending portion 62c and the second side surface vertical extending portion 62d are located above the intersection 47b with the second front lower edge seal portion 48b, the second rear lower edge seal portion 49b, and the second edge seal portion 47. In addition, the lower ends of the rear side vertical extending portion 62c and the second side surface vertical extending portion 62d are located below the intersection 47b with the second front lower edge seal portion 48b, the second rear lower edge seal portion 49b, and the second edge seal portion 47. This can further improve the deformation resistance of the sheet material container 100 against forces applied in the vertical direction.

[0036] Furthermore, in this embodiment, a fold 89a extending in the width direction is formed in the upper part of the front part 20a. The upper ends of the front side vertical extension part 61a and the first side surface side vertical extension part 61b, and the upper ends of the front side vertical extension part 61c and the second side surface side vertical extension part 61d are located above the fold 89a. This makes it possible to ensure sufficient vertical dimensions for each of the first vertical extending portion 60a and the second vertical extending portion 60b, thereby further improving the structural strength of the sheet material container 100. Similarly, a fold 89b extending in the width direction is formed at the upper portion of the back portion 20b. The upper ends of the back side vertical extending portion 62a and the first side surface vertical extending portion 62b, and the upper ends of the back side vertical extending portion 62c and the second side surface vertical extending portion 62d are located above the fold 89b. This makes it possible to ensure sufficient vertical dimensions for each of the third vertical extending portion 60c and the fourth vertical extending portion 60d, thereby further improving the structural strength of the sheet material container 100.

[0037] It is preferable that the lower ends of the front side vertical extension portions 61a and 61c reach the lower end of the front portion 20a. This improves the deformation resistance of the front portion 20a, thereby suppressing deformation of the container body 20 in the front-rear direction. Similarly, it is preferable that the lower ends of the rear side vertical extension portion 62a and the rear side vertical extension portion 62c reach the lower end of the rear portion 20b. This makes it possible to improve the deformation resistance of the rear surface portion 20b, so that deformation of the container body 20 in the front-rear direction can be more reliably suppressed.

[0038] More preferably, the front side vertical extension portion 61a and the front side vertical extension portion 61c extend from the upper end to the lower end of the front portion 20a. By doing so, the deformation resistance of the front portion 20a can be further improved. Similarly, more preferably, the rear side vertical extension portion 62a and the rear side vertical extension portion 62c extend from the upper end to the lower end of the rear portion 20b. This can further improve the deformation resistance of the back surface portion 20b.

[0039] Furthermore, as shown in FIG. 5, the front side vertical extension portion 61a and the front side vertical extension portion 61c are preferably disposed directly above the ground surface 13a of the bottom portion 13. By doing this, even if an impact is applied to the contact surface 13a due to a drop or the like, the impact applied to the first front lower edge seal portion 48a, the first back lower edge seal portion 49a, and the intersection 46b with the first edge seal portion 46 can be reduced. Similarly, the first side surface vertical extension portion 61b and the second side surface vertical extension portions 61d to 62d are preferably disposed directly above the contact surface 13a of the bottom portion 13. By doing this, even if an impact is applied to the contact surface 13a due to a drop or the like, the impact applied to the intersection 46b between the first front lower edge seal portion 48a, the first back lower edge seal portion 49a and the first edge seal portion 46, and the intersection 46b between the second front lower edge seal portion 48b, the second back lower edge seal portion 49b and the second edge seal portion 47 can be mitigated. Here, "the front side vertical extending portion 61a is disposed directly above the ground surface 13a" means that at least a portion of the front side vertical extending portion 61a overlaps with the ground surface 13a in a plan view. Similarly, "the front side vertical extending portion 61c (or the second side surface side vertical extending portion 61d to the second side surface side vertical extending portion 62d) is disposed directly above the ground surface 13a" means that at least a portion of the front side vertical extending portion 61c (or the second side surface side vertical extending portion 61d to the second side surface side vertical extending portion 62d) overlaps with the ground surface 13a in a plan view.

[0040] More specifically, in the present embodiment, the front side vertical extension portion 61a extends from the upper left corner to the lower left corner of the front portion 20a, and the front side vertical extension portion 61c extends from the upper right corner to the lower right corner of the front portion 20a. The first side surface side vertical extension portion 61b extends from the front and upper corner to the front and lower corner of the first side surface portion 20c, and the second side surface side vertical extension portion 61d extends from the front and upper corner to the front and lower corner of the second side surface portion 20d. Similarly, in this embodiment, the rear side vertical extension portion 62a extends from the upper left corner to the lower left corner of the rear portion 20b, and the rear side vertical extension portion 62c extends from the upper right corner to the lower right corner of the rear portion 20b. The first side surface side vertical extension portion 62b extends from the rear and upper corner to the rear and lower corner of the first side surface portion 20c, and the second side surface side vertical extension portion 62d extends from the rear and upper corner to the rear and lower corner of the second side surface portion 20d.

[0041] Furthermore, as shown in Figures 1 and 3, it is preferable that the left-right separation distance between the front side vertical extending portion 61a and the front side vertical extending portion 61c is greater than the left-right separation distance between the front side vertical extending portion 61a and the first side surface side vertical extending portion 61b. By doing this, the front side vertical extending portion 61a and the first side surface side vertical extending portion 61b are positioned closer to each other, so that the filling portion 60 can better reinforce the first edge portion 16a and its vicinity. Similarly, it is preferable that the left-right separation distance between the front side vertical extending portion 61a and the front side vertical extending portion 61c is greater than the left-right separation distance between the front side vertical extending portion 61c and the second side surface side vertical extending portion 61d, and it is preferable that the left-right separation distance between the rear side vertical extending portion 62a and the rear side vertical extending portion 62c is greater than the left-right separation distance between the rear side vertical extending portion 62a and the first side surface side vertical extending portion 62b, and the left-right separation distance between the rear side vertical extending portion 62c and the second side surface side vertical extending portion 62d. By doing this, the front side vertical extending portion 61c and the second side surface side vertical extending portion 61d, the rear side vertical extending portion 62a and the first side surface side vertical extending portion 62b, and the rear side vertical extending portion 62c and the second side surface side vertical extending portion 62d are arranged closer to each other, so that the filling portion 60 can better reinforce the second edge portion 16b to the fourth edge portion 16d and their vicinity.

[0042] In addition, as shown in Figures 1 and 3, it is also preferable that the distance in the front-to-back direction between the front side vertical extending portion 61a and the rear side vertical extending portion 62a is greater than the distance in the left-right direction between the front side vertical extending portion 61a and the first side surface side vertical extending portion 61b. By doing this, the front side vertical extending portion 61a and the first side surface side vertical extending portion 61b are positioned closer to each other, so that the filling portion 60 can better reinforce the first edge portion 16a and its vicinity. Similarly, it is preferable that the distance between the second side surface side vertical extending portion 61d and the second side surface side vertical extending portion 62d in the front-rear direction is greater than the distance between the front side vertical extending portion 61c and the second side surface side vertical extending portion 61d in the left-right direction, and it is also preferable that the distance between the rear side vertical extending portion 62a and the first side surface side vertical extending portion 61b in the front-rear direction is greater than the distance between the rear side vertical extending portion 62a and the first side surface side vertical extending portion 62b in the left-right direction. It is also preferable that the distance between the second side surface side vertical extending portion 62d and the second side surface side vertical extending portion 61d in the front-rear direction is greater than the distance between the rear side vertical extending portion 62c and the second side surface side vertical extending portion 62d in the left-right direction. By doing this, the front side vertical extending portion 61c and the second side surface side vertical extending portion 61d, the rear side vertical extending portion 62a and the first side surface side vertical extending portion 62b, and the rear side vertical extending portion 62c and the second side surface side vertical extending portion 62d are arranged closer to each other, so that the filling portion 60 can better reinforce the second edge portion 16b to the fourth edge portion 16d and their vicinity.

[0043] Furthermore, in the case of this embodiment, as described above, as shown in Figures 1 to 4, in addition to the first protrusion 65a and the second protrusion 65b, the filling portion 60 has a third protrusion 65c protruding from the second vertical extending portion 60b toward the center in the width direction of the front portion 20a at the vertical center of the front portion 20a, and a fourth protrusion 65d protruding from the second vertical extending portion 60b toward the center in the width direction of the second side portion 20d at the vertical center of the second side portion 20d. As a result, even if the contents contained in the storage area 17 are reduced, the first protruding portion 65a to the fourth protruding portion 65d can satisfactorily maintain the state in which the front portion 20a and the first side portion 20c intersect with each other, and the state in which the front portion 20a and the second side portion 20d intersect with each other. That is, deformation (crushing) of the sheet material container 100 caused by the reduction in the contents contained in the storage area 17 can be more reliably suppressed.

[0044] The filling portion 60 also has, for example, a fifth protrusion 65e protruding from the third vertical extension portion 60c toward the center in the width direction of the back portion 20b at the vertical middle portion of the back portion 20b, a sixth protrusion 65f protruding from the third vertical extension portion 60c toward the center in the width direction of the first side portion 20c at the vertical middle portion of the first side portion 20c, a seventh protrusion 65g protruding from the fourth vertical extension portion 60d toward the center in the width direction of the back portion 20b at the vertical middle portion of the back portion 20b, and an eighth protrusion 65h protruding from the fourth vertical extension portion 60d toward the center in the width direction of the second side portion 20d at the vertical middle portion of the second side portion 20d. More specifically, the first protrusion 65a protrudes from the front vertical extension 61a toward the center in the width direction of the front portion 20a, for example, in the middle portion in the vertical direction of the front portion 20a. The second protruding portion 65b protrudes from the first side surface vertical extending portion 61b toward the center in the width direction of the first side surface portion 20c, for example, at the middle portion in the vertical direction of the first side surface portion 20c. The third protrusion 65c protrudes from the front vertical extension 61c toward the center in the width direction of the front portion 20a, for example, at the center in the vertical direction of the front portion 20a. The fourth protrusion 65d protrudes from the second side surface vertical extension 61d toward the center in the width direction of the second side surface portion 20d, for example, at the center in the up-down direction of the second side surface portion 20d. The fifth protrusion 65e protrudes from the rear-side vertical extension 62a toward the center in the width direction of the rear portion 20b, for example, in the middle portion in the vertical direction of the rear portion 20b. The sixth protrusion 65f protrudes from the first side surface vertical extension 62b toward the center in the width direction of the first side surface portion 20c, for example, in the vertical middle portion of the first side surface portion 20c. The seventh protrusion 65g protrudes from the rear-side vertical extension 62c toward the center in the width direction of the rear portion 20b, for example, at the center in the vertical direction of the rear portion 20b. The eighth protrusion 65h protrudes, for example, from the second side surface vertical extension 62d at the center in the vertical direction of the second side surface portion 20d toward the center in the width direction of the second side surface portion 20d. According to this configuration, the sheet material container 100 has a structure having a filling portion 60 (first protruding portion 65a to eighth protruding portion 65h) extending in the front-rear and left-right directions near the middle portions in the up-down direction of the front portion 20a, the back portion 20b, the first side portion 20c, and the second side portion 20d. Therefore, deformation (crushing) of the sheet material container 100 caused by a decrease in the contents contained in the containing area 17 can be more reliably suppressed. More specifically, in the case of this embodiment, the first protruding portion 65a and the second protruding portion 65b can satisfactorily maintain the state in which the front portion 20a and the first side portion 20c are substantially perpendicular to each other. Similarly, the third protrusion 65c to the eighth protrusion 65h can satisfactorily maintain the state in which the front portion 20a and the second side portion 20d are substantially perpendicular to each other, the state in which the back portion 20b and the first side portion 20c are substantially perpendicular to each other, and the state in which the back portion 20b and the second side portion 20d are substantially perpendicular to each other. That is, the state in which the front portion 20a and the back portion 20b face each other substantially parallel to each other in the front-rear direction with the storage area 17 therebetween, and the state in which the first side portion 20c and the second side portion 20d face each other substantially parallel to each other in the left-right direction can be satisfactorily maintained. In addition, here, the "middle part in the vertical direction of the rear surface portion 20b" refers to, for example, at least the part between the upper end and the lower end of the rear surface portion 20b. Preferably, the "middle part in the vertical direction of the rear part 20b" is, for example, the center part of the rear part 20b, and the center part is the middle region among three equal parts obtained by dividing the rear part 20b in the height direction. Furthermore, in this embodiment, it is preferable that each of the first protrusion 65a, the third protrusion 65c, the fifth protrusion 65e and the seventh protrusion 65g extends to include a position that divides the front portion 20a (or the back portion 20b) into approximately two equal parts vertically (see 1 / 2H shown in Figure 2). Also, here, "the center in the width direction of the rear portion 20b" means, for example, the center of the rear portion 20b in the left-right direction, and means the middle area of ​​the rear portion 20b divided into three equal parts in the left-right direction.

[0045] 4, the second protruding portion 65b and the sixth protruding portion 65f face each other, for example, with the first side edge seal portion 46 therebetween. Similarly, as shown in FIG 1, the fourth protruding portion 65d and the eighth protruding portion 65h face each other, for example, with the second side edge seal portion 47 therebetween. With this configuration, the area near the first side edge seal portion 46 can be effectively reinforced by the second protrusion portion 65b and the sixth protrusion portion 65f, and the area near the second side edge seal portion 47 can be effectively reinforced by the fourth protrusion portion 65d and the eighth protrusion portion 65h.

[0046] As shown in Fig. 2, in this embodiment, the width (horizontal dimension in this embodiment) of each of the front side vertical extending portions 61a and 61c gradually narrows toward the middle in the vertical direction. Similarly, as shown in Fig. 3, the width (horizontal dimension in this embodiment) of each of the rear side vertical extending portions 62a and 62c gradually narrows toward the middle in the vertical direction. 4, the width (horizontal dimension in this embodiment) of each of the first side surface side vertical extending portion 61b and the second side surface side vertical extending portion 61d gradually increases toward the middle in the vertical direction. Similarly, as shown in FIG. 3, the width (horizontal dimension in this embodiment) of each of the first side surface side vertical extending portion 62b and the second side surface side vertical extending portion 62d gradually increases toward the middle in the vertical direction.

[0047] Furthermore, the filling portion 60 has an annular filling portion 68 formed in a ring shape along the periphery of the ground contact surface 13a, a top gusset filling portion 66 formed in a ring shape along the periphery of the top gusset 14, an upper horizontal extension portion (in this embodiment, the first upper horizontal extension portion 63a) extending in the width direction from the vertical extension portion (first vertical extension portion 60a) to the second vertical extension portion 60b at the upper end of the front portion 20a, and a lower horizontal extension portion (in this embodiment, the first lower horizontal extension portion 64a) extending in the width direction from the vertical extension portion (first vertical extension portion 60a) to the second vertical extension portion 60b at the lower end of the front portion 20a. As a result, the front portion 20a is further reinforced by the first upper horizontal extension portion 63a and the first lower horizontal extension portion 64a, so that deformation (crushing) of the sheet material container 100 caused by a reduction in the contents contained in the storage area 17 can be more reliably suppressed. The filling portion 60 also has a second upper horizontal extension portion 63b extending in the width direction from the third upper and lower extension portion 60c to the fourth upper and lower extension portion 60d at the upper end of the back portion 20b, and a second lower horizontal extension portion 64b extending in the width direction from the third upper and lower extension portion 60c to the fourth upper and lower extension portion 60d at the lower end of the back portion 20b. As a result, the back portion 20b is further reinforced by the second upper horizontal extension portion 63b and the second lower horizontal extension portion 64b, so that deformation (crushing) of the sheet material container 100 caused by a reduction in the contents contained in the storage area 17 can be more reliably suppressed. More specifically, the first upper horizontal extending portion 63a connects, for example, the upper end of the front side vertical extending portion 61a and the upper end of the front side vertical extending portion 61c to each other. The second upper horizontal extending portion 63b connects the upper end of the rear side vertical extending portion 62a and the upper end of the rear side vertical extending portion 62c to each other. The first lower horizontal extending portion 64a, for example, connects the lower end of the front side vertical extending portion 61a and the lower end of the front side vertical extending portion 61c to each other. The second lower horizontal extending portion 64b, for example, connects the lower end of the rear side vertical extending portion 62a and the lower end of the rear side vertical extending portion 62c to each other. The first upper horizontal extending portion 63a, the second upper horizontal extending portion 63b, the first lower horizontal extending portion 64a, and the second lower horizontal extending portion 64b each extend, for example, substantially horizontally to the left and right. Since the sheet material container 100 has the filling section 60 constructed as described above, the structural strength of the container body 20 is ensured over almost the entirety of the container body 20 .

[0048] In the present embodiment, the entire filling portion 60 is formed as one continuous piece. However, in the present invention, the sheet material container 100 may have a plurality of filling sections 60 that are independent of each other. More specifically, the lower end of the front side vertical extension portion 61a and the lower end of the front side vertical extension portion 61c are each connected to the annular filling portion 68 (in this embodiment, the front edge of the annular filling portion 68). The upper end of the front side vertical extension portion 61a and the upper end of the front side vertical extension portion 61c are each connected to the top gusset filling portion 66 (in this embodiment, the front edge of the top gusset filling portion 66). Similarly, the lower end of the rear side vertical extending portion 62a and the lower end of the rear side vertical extending portion 62c are each connected to the annular filling portion 68 (in this embodiment, the rear edge of the annular filling portion 68), and the upper end of the rear side vertical extending portion 62a and the upper end of the rear side vertical extending portion 62c are each connected to the top gusset filling portion 66 (in this embodiment, the rear edge of the top gusset filling portion 66). The front side vertical extending portion 61a and the first side surface vertical extending portion 61b are connected to each other at the upper end, the vertical center, and the lower end. More specifically, the front side vertical extending portion 61a and the first side surface vertical extending portion 61b are connected to each other at the upper end, the vertical center, and the lower end of the first edge portion 16a. The front side vertical extension portion 61c and the second side surface side vertical extension portion 61d are mutually connected at the upper end, the vertical center, and the lower end. More specifically, the front side vertical extension portion 61c and the second side surface side vertical extension portion 61d are mutually connected at the upper end, the vertical center, and the lower end of the second edge portion 16b. The rear side vertical extension portion 62a and the first side surface side vertical extension portion 62b are mutually connected at the upper end, the vertical center, and the lower end. More specifically, the rear side vertical extension portion 62a and the first side surface side vertical extension portion 62b are mutually connected at the upper end, the vertical center, and the lower end of the third edge portion 16c. The rear side vertical extending portion 62c and the second side surface vertical extending portion 62d are mutually connected at the upper end, the vertical center, and the lower end. More specifically, the rear side vertical extending portion 62c and the second side surface vertical extending portion 62d are mutually connected at the upper end, the vertical center, and the lower end of the fourth edge portion 16d.

[0049] The first protruding portion 65a and the third protruding portion 65c are directly connected to each other, and the assembly of the first protruding portion 65a and the third protruding portion 65c extends in the width direction of the front portion 20a. As a result, the filling portion 60 can further improve the deformation resistance of the front portion 20a. Similarly, the fifth protrusion 65e and the seventh protrusion 65g are directly connected to each other, and the aggregate of the fifth protrusion 65e and the seventh protrusion 65g extends in the lateral width direction of the back surface portion 20b. This allows the filling portion 60 to further improve the deformation resistance of the back surface portion 20b. Here, "the protrusions are directly connected to each other" means that there is no other portion of the filling portion 60 between the protrusions, and the protrusions are directly connected to each other. In other words, the ends of the protrusions are in direct contact with each other, and the protrusions are connected to each other at the ends. 2 and 3, the thickness (vertical dimension in this embodiment) of the aggregate of the first protrusion 65a and the third protrusion 65c is substantially constant regardless of the position in the left-right direction. Similarly, the thickness (vertical dimension in this embodiment) of the aggregate of the fifth protrusion 65e and the seventh protrusion 65g is substantially constant regardless of the position in the left-right direction.

[0050] In addition, in this embodiment, when the first side edge seal portion 46, the second side edge seal portion 47, the first front lower edge seal portion 48a, the first back lower edge seal portion 49a, the second front lower edge seal portion 48b, and the second front lower edge seal portion 48b are peeled off and the main body constituent sheet material 21 is developed into a flat surface (see Figure 8), the front side upper and lower extending portion 61a and a portion of the annular filling portion 68 are arranged in a straight line, and the front side upper and lower extending portion 61c and another portion of the annular filling portion 68 are arranged in a straight line. As a result, each of the front side vertical extending portions 61a and 61c is structured to stand approximately vertically from the annular filling portion 68 and ultimately the ground surface 13a, thereby further improving the deformation resistance of the sheet material container 100 against forces applied in the vertical direction. Similarly, when the main body sheet material 21 is laid out flat (see Figure 8), the rear side vertical extending portion 62a and a portion of the annular filling portion 68 are arranged in a straight line, and the rear side vertical extending portion 62c and another portion of the annular filling portion 68 are arranged in a straight line. As a result, each of the rear side vertical extending portions 62a and 62c is structured to stand approximately vertically from the annular filling portion 68 and ultimately the ground surface 13a, thereby improving the deformation resistance of the sheet material container 100 against forces applied in the vertical direction. In this case, "arranged in a straight line" means that when the main body sheet material 21 is laid out flat, a single straight line extending vertically (dotted lines 101, 102 shown in Figure 8) is arranged so as to fit within the formation area of ​​the corresponding filling portion 60. More preferably, the front side vertical extension 61a and a portion of the ground surface 13a are linearly arranged, and the front side vertical extension 61c and another portion of the ground surface 13a are linearly arranged. Similarly, the rear side vertical extension 62a and a portion of the ground surface 13a are linearly arranged, and the rear side vertical extension 62c and another portion of the ground surface 13a are linearly arranged. More preferably, a portion of the top gusset filling portion 66, the front side vertical extension portion 61a, a portion of the ground surface 13a, and the rear side vertical extension portion 62a are arranged in a straight line. Similarly, a portion of the top gusset filling portion 66, the front side vertical extension portion 61c, a portion of the ground surface 13a, and the rear side vertical extension portion 62c are arranged in a straight line. In addition, in the front portion 20a, the front side vertical extending portion 61a and the front side vertical extending portion 61c extend approximately parallel to each other, and in the rear portion 20b, the rear side vertical extending portion 62a and the rear side vertical extending portion 62c extend approximately parallel to each other.

[0051] In this embodiment, the container body 20 has an outside air introduction section 98 for introducing outside air between the inner surface of the container body 20 and the outer surface of the inner bag 40 . The outside air introduction section 98 is, for example, a through hole penetrating the outer film layer 22 and the inner film layer 23 . By doing this, air can be smoothly taken in through the outside air inlet section 98 (air can be smoothly taken in between the inner surface of the container body 20 and the outer surface of the inner bag 40), so that deformation (crushing) of the container body 20 can be suppressed even when a large amount of contents is expelled in a short period of time. As shown in FIG. 5, in the present embodiment, the outside air introduction part 98 is formed in the center of the bottom part 13, for example.

[0052] 6 and 7, the main body constituting sheet material 21 is formed by mutually laminating and bonding an outer film layer 22 constituting the outer surface side of the container body 20 and an inner film layer 23 constituting the inner surface side of the container body 20. That is, as an example, in the case of the present embodiment, the main body constituting sheet material 21 is formed of two film layers, the outer film layer 22 and the inner film layer 23. However, the present invention is not limited to this example, and the main body constituting sheet material 21 may have a film layer other than the outer film layer 22 and the inner film layer 23. In this embodiment, the outer film layer 22 and the inner film layer 23 are formed to have the same shape. However, the present invention is not limited to this example, and the outer film layer 22 and the inner film layer 23 may have different shapes. In the case of different shapes, it is preferable that the outer film layer 22 is larger than the inner film layer 23. The outer film layer 22 and the inner film layer 23 have an insertion hole formed therein through which the tubular portion 15a of the spout 15 is inserted.

[0053] The sheet material 21 has a non-bonded portion 24 (FIG. 8) formed by partially non-bonding the outer film layer 22 and the inner film layer 23. For example, the surface of one or both of the outer film layer 22 and the inner film layer 23 facing the other is partially non-bonded. The non-bonding treatment can be easily formed by applying a non-bonding agent (so-called glue killing agent) to create a glue killing state. Any glue killing agent can be used as long as it can suppress the bonding between the outer film layer 22 and the inner film layer 23. For example, printing inks used in offset printing, flexographic printing, and letterpress printing (relief printing), medium inks, and dedicated glue killing inks can be preferably used as glue killing agents. In addition, heat-curing or ultraviolet-curing inks can be preferably used. The area subjected to the non-bonding treatment becomes the non-bonded portion 24. A filler is filled in the non-bonded portion 24 to form a filled portion 60 in which the filler is filled. The filler may be a fluid (gas or liquid), a solid (eg, powder, granules, resin pellets, etc.) or a semi-solid (eg, foam, etc.), and is preferably a gas such as air. The filling portion 60 is not necessarily limited to being formed in the entire non-bonded portion 24, but may be formed in some of the non-bonded portions 24, which are plural. In FIG. 6, the regions of the outer film layer 22 and the inner film layer 23 that are joined to each other to form the main body seal portion 26 are hatched in an upward slanting pattern to the right for the sake of convenience. 7 and 8, the area of ​​the main body sheet material 21 where the outer film layer 22 and the inner film layer 23 are joined to each other to define the non-jointed portion 24, i.e., the area where the main body seal portion 26 is formed, is conveniently hatched from top to bottom. 7, a seal boundary line 21c, which is a boundary line between the sealed area on the periphery of the main body forming sheet material 21 and the other area, is indicated by a two-dot chain line. In the case of this embodiment, in the area outside the seal boundary line 21c of the main body forming sheet material 21, the outer film layer 22 and the inner film layer 23 are bonded to each other during bag making, and the inner film layer 23 and the inner bag forming sheet material 41 are bonded to each other. Examples of the method for joining the outer film layer 22 and the inner film layer 23 include heat sealing, ultrasonic sealing, and joining with an adhesive.

[0054] In this embodiment, each of the outer film layer 22 and the inner film layer 23 has a layered structure including a plurality of resin layers. The inner bag-constituting sheet material 41 also has a layered structure including a plurality of resin layers.

[0055] The main body forming sheet material 21 preferably includes a resin layer of any one of polyethylene, polypropylene, polyester, and polyamide. The material of the resin layers constituting the outer film layer 22 and the inner film layer 23 of the main body-constituting sheet material 21 is not particularly limited, but may be, for example, a polyethylene-based material such as high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ultra-low density polyethylene (ULDPE), or ethylene-vinyl alcohol copolymer (EVOH), or an oriented polypropylene (OPP), unoriented polypropylene (CPP), isotactic PP, syndiotactic PP, atactic PP, random PP, or the like. More preferably, the material is any one of polypropylene-based materials such as polyethylene terephthalate (PET), amorphous polyethylene terephthalate (amorphous PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), and other polyester-based materials, and polyamide-based materials such as oriented nylon (ONy), unoriented nylon (CNy), nylon 6, nylon 66, nylon 11, nylon 12, and MXD6, and among these, the above-mentioned polyethylene-based materials are particularly preferred.

[0056] As an example, the outer film layer 22 has a four-layer structure formed by laminating four resin layers, namely, a first layer, a second layer, a third layer, and a fourth layer, in this order. Of these, the first layer constitutes the outer surface of the container body 20. The first layer is made of, for example, polyethylene terephthalate (PET) or oriented nylon (ONy). The main functions of the first layer include imparting gloss and printability to the container body 20 and ensuring the rigidity of the container body 20. The second layer is, for example, a layer of transparent vapor-deposited PET made of polyethylene terephthalate with silica and / or alumina vapor-deposited on the surface of the second layer facing the first layer. The main function of the second layer is to provide the container body 20 with gas barrier properties. The third layer is made of, for example, oriented nylon. The main function of the third layer is to ensure that the container body 20 is pinhole-resistant. The fourth layer is made of, for example, linear low density polyethylene (LLDPE). The main function of the fourth layer is to ensure heat sealability with the inner film layer 23.

[0057] The layer structure of the inner film layer 23 may include a fifth layer made of, for example, linear low density polyethylene (LLDPE) in addition to the same layer structure as the first to fourth layers of the outer film layer 22. The fifth layer is adjacent to the first layer and constitutes the surface of the inner film layer 23 opposite to the fourth layer. The main function of the fifth layer is to ensure heat sealability with the outer film layer 22. The main function of the fourth layer of the inner film layer 23 is to ensure heat sealability with the inner bag-constituting sheet material 41 .

[0058] The inner bag constituent sheet material 41 constituting the inner bag 40 has, as one example, a three-layer structure constituted by laminating a first layer, a second layer, and a third layer in this order. The first layer is made of, for example, linear low-density polyethylene. The main function of the first layer is to ensure heat sealability with the main body sheet material 21 (heat sealability with the inner film layer 23). The second layer is, for example, a transparent vapor-deposited stretched nylon layer made of stretched nylon with silica and / or alumina vapor-deposited on the surface of the second layer facing the first layer. The main functions of the second layer include ensuring gas barrier properties and pinhole resistance. The third layer is made of, for example, linear low-density polyethylene. The main function of the third layer is to ensure the heat sealability between the inner bag-constituting sheet materials 41.

[0059] The multiple film layers (in this embodiment, the outer film layer 22 and the inner film layer 23) of the main body sheet material 21 are, for example, made of a common resin material, and it is preferable that the molecular skeletons of the main chain and side chains in the chemical structure of the molecules of the common resin material are common to each other. By doing so, the physical properties and quality of the recycled material obtained from the container body 20 can be improved.

[0060] Furthermore, the common resin material is, for example, a polyethylene-based resin material, and the polyethylene-based resin material is preferably at least one selected from the group consisting of high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), very low density polyethylene (ULDPE), and ethylene-vinyl alcohol copolymer (EVOH). By doing so, since the container body 20 is made of a polyethylene-based resin material, a container recycling system for polyethylene-based resin materials can be established, and the physical properties and quality of the recycled material can be further improved.

[0061] More specifically, from the viewpoint of recyclability, it is preferable that the outer film layer 22, the inner film layer 23 and the inner bag-constituting sheet material 41 are all composed of an olefin-based, particularly a polyethylene-based resin layer.

[0062] In this case, the outer film layer 22 has three layers, in order from the outer surface side of the container, of linear low density polyethylene (LLDPE), ethylene-vinyl alcohol copolymer (EVOH), and linear low density polyethylene (LLDPE). In this case, the inner film layer 23 and the inner bag-constituting sheet material 41 each have the same layer structure as the outer film layer 22 .

[0063] Alternatively, the outer film layer 22 may have four layers, in order from the outer surface side of the container, of biaxially oriented polyethylene (BOPE), linear low density polyethylene (LLDPE), ethylene-vinyl alcohol copolymer (EVOH), and linear low density polyethylene (LLDPE). In this case, the inner film layer 23 and the inner bag constituent sheet material 41 each have three layers of linear low density polyethylene (LLDPE), ethylene-vinyl alcohol copolymer (EVOH), and linear low density polyethylene (LLDPE).

[0064] Alternatively, the outer film layer 22 may include two layers of biaxially oriented polyethylene (BOPE) and linear low density polyethylene (LLDPE) in that order from the outer surface side of the container, and a coated gas barrier layer as the outermost layer. The coated gas barrier layer is a coating layer formed by coating a material having gas barrier properties, and does not include vapor deposition layers formed by vapor deposition of metal, silica, etc. In other words, the coated gas barrier layer is limited to a coating layer formed by coating a material having gas barrier properties. The gas barrier material is not particularly limited as long as it can be applied to form a coating layer, but suitable examples include polyvinylidene chloride, ethylene-vinyl alcohol copolymer (EVOH), organic (ethylene-vinyl alcohol copolymer resin (EVOH)-based) / inorganic (plate-like filler) nanocomposite materials, organic (vinyl acetate (VA)-based) / inorganic (siloxane polymer) hybrid materials, polyvinyl alcohol (PVOH), copolymers of polyvinyl alcohol (PVOH) with acrylic acid and methyl methacrylate, hydroxy polyurethane, etc. In particular, it is more preferable to use materials that have high coatability (adhesion when applied) to the substrate layer and / or that can be removed from the substrate layer by treatment with alkaline water, hot water, organic solvent, etc. In this case, the inner film layer 23 has two layers of linear low density polyethylene (LLDPE) and high density polyethylene (HDPE) in that order from the outer surface side of the container, and has the above-mentioned coated gas barrier layer as the innermost layer. In this case, the inner bag constituent sheet material 41 has two layers of high density polyethylene (HDPE) and linear low density polyethylene (LLDPE) in that order from the outer surface side of the container, and has the above-mentioned coated gas barrier layer as the outermost layer.

[0065] Alternatively, the outer film layer 22 may have two layers of high density polyethylene (HDPE) and linear low density polyethylene (LLDPE) in that order from the outer surface side of the container, with the above-mentioned coated gas barrier layer in the middle layer. In this case, the inner film layer 23 has two layers of linear low density polyethylene (LLDPE) and high density polyethylene (HDPE) in that order from the outer surface side of the container, and has the above-mentioned coated gas barrier layer as an intermediate layer. In this case, the inner bag-constituting sheet material 41 has the same layer structure as the outer film layer 22 .

[0066] However, the layer structure of the outer film layer 22 and the inner film layer 23 is not limited to the above example, and the materials and number of layers constituting the outer film layer 22 and the inner film layer 23 are not limited to the above example. Furthermore, the layer structure of the inner bag-constituting sheet material 41 is not limited to the above example.

[0067] 6 and 7, the inner bag sheet material 41 is laminated on the main body sheet material 21, and the peripheral edge of the inner film layer 23 and the peripheral edge of the inner bag sheet material 41 are joined to each other as shown in Fig. 7, and the peripheral edge of the outer film layer 22 and the peripheral edge of the inner film layer 23 are joined to each other. In this way, the main body sheet material 21 and the inner bag sheet material 41 form a container sheet material 51. Here, the sealed portion at the periphery of the container-constituting sheet material 51 is referred to as the periphery sealed portion 52. The periphery sealed portion 52 includes a sealed portion between the periphery of the inner film layer 23 and the periphery of the inner bag-constituting sheet material 41 (hereinafter, the inner / outer sealed portion 43), and a sealed portion between the periphery of the outer film layer 22 and the periphery of the inner film layer 23 (hereinafter, the main body periphery sealed portion 28). In one portion of the region where the main body periphery sealed portion 28 is formed, a top gusset periphery sealed portion 45 is formed, and in the other portion, a first side edge sealed portion 46 and a second side edge sealed portion 47 are formed. In this manner, the sheet material container 100 has a peripheral seal portion 52 in which the peripheral edges of one or more sheet materials are joined to each other, and the peripheral seal portion 52 includes a first side edge seal portion 46 and a second side edge seal portion 47 extending along each of a pair of side edges of the body portion 11. In Fig. 8, the region where peripheral seal portion 52 is formed is hatched from top to bottom. Also, in Fig. 8, in the region where the region where peripheral seal portion 52 is formed and the region where main body seal portion 26 is formed overlap, the hatching from top to bottom overlaps with the hatching from top to bottom to top to bottom. Examples of the method for forming the peripheral seal portion 52 include heat sealing, ultrasonic sealing, and bonding with an adhesive.

[0068] 6, the main body sheet material 21 has, for example, a front side sheet part 31, a back side sheet part 32, a bottom sheet part 33, as well as a top gusset sheet part 34 constituting the top gusset 14, and a tubular extending part 25. The extending part 25 extends outward from the back side sheet part 32, for example. The top gusset forming sheet portion 34 has an insertion hole 21a through which the tubular portion 15a of the spout 15 is inserted. In this embodiment, the non-jointed portion 24 is formed in a shape corresponding to the shape of the filling portion 60 of the sheet material container 100 . In the non-joint portion 24, the portion that becomes the top gusset filling portion 66 is formed in a circumferential shape surrounding the insertion hole 21a.

[0069] In this embodiment, as shown in FIG. 8, the main body seal portion 26 includes, for example, in addition to the main body peripheral seal portion 28, a plurality (e.g., four) of inner main body seal portions 26a arranged inside the main body peripheral seal portion 28, and a plurality (e.g., eight) of edge-shaped portion-forming seal portions 27 arranged between the main body peripheral seal portion 28 and the inner main body seal portion 26a.

[0070] Each of the inner circumferential body seal portions 26a is formed, for example, in a substantially rectangular ring shape when viewed from the front. As shown in FIG. 2 and FIG. 8, two inner circumferential body seal parts 26a are arranged on the front part 20a. The two inner circumferential body seal parts 26a are arranged, for example, vertically side by side. More specifically, in a front view, the upper inner circumferential body seal part 26a is, for example, substantially trapezoidal in shape with the length dimension of the lower base (lower edge) being greater than the length dimension of the upper base (upper edge). The lower inner circumferential body seal part 26a is, for example, substantially trapezoidal in shape with the length dimension of the upper base (upper edge) being greater than the length dimension of the lower base (lower edge). A gap is formed between the lower edge of the upper inner circumferential body seal part 26a and the upper edge of the lower inner circumferential body seal part 26a, and the gap is the non-joint part 24. The assembly of the first protrusion 65a and the third protrusion 65c is defined by the lower edge of the upper inner periphery side body seal portion 26a and the upper edge of the lower inner periphery side body seal portion 26a. Similarly, as shown in Fig. 3 and other figures, two inner body seal parts 26a are arranged vertically on the rear surface 20b. In rear view, the upper inner body seal part 26a is, for example, substantially trapezoidal in shape with a lower base (lower edge) longer than the upper base (upper edge), and the lower inner body seal part 26a is, for example, substantially trapezoidal in shape with an upper base (upper edge) longer than the lower base (lower edge). The assembly of the fifth protrusion 65e and the seventh protrusion 65g is defined by the lower edge of the upper inner body seal part 26a and the upper edge of the lower inner body seal part 26a. For example, each inner circumferential body seal portion 26a may be substantially square in shape when viewed from the front.

[0071] The side-forming seal portions 27 are formed, for example, two each in the portions of the main body forming sheet material 21 that are to become the first side portion 16a to the fourth side portion 16d. 5, each side-shaped portion forming seal portion 27 is formed, for example, in a substantially narrow ring shape that is long in the vertical direction. More specifically, when the main body forming sheet material 21 is unfolded, each side-shaped portion forming seal portion 27 of the first side-shaped portion 16a and the third side-shaped portion 16c is formed in a substantially trapezoidal shape that is convex toward the left side, and each side-shaped portion forming seal portion 27 of the second side-shaped portion 16b and the fourth side-shaped portion 16d is formed in a substantially trapezoidal shape that is convex toward the right side. Each side-shaped portion-forming seal portion 27 is disposed, for example, along the boundary line between the corresponding planar portions. Furthermore, the non-filled portions 67 of the first edge-shaped portion 16a to the fourth edge-shaped portion 16d are, for example, composed of a formation area of ​​the edge-shaped portion-forming seal portion 27 formed in the corresponding edge-shaped portion and a closed area defined by the edge-shaped portion-forming seal portion 27. The portions of the first side portion 16a to the fourth side portion 16d other than the non-filled portions 67 serve as communication points between the corresponding two upper and lower extending portions. More specifically, each side-shaped portion forming seal portion 27 is formed avoiding both ends in the longitudinal direction of the corresponding side-shaped portion. Also, the two side-shaped portion forming seal portions 27 corresponding to the first side-shaped portion 16a to the fourth side-shaped portion 16d are arranged slightly spaced apart from each other, for example, in the middle portion in the vertical direction. As a result, in the first side-shaped portion 16a to the fourth side-shaped portion 16d, the two corresponding upper and lower extending portions communicate with each other at the upper end, lower end and middle portion of the side-shaped portion. The non-filled portions 67 of the first side portion 16a to the fourth side portion 16d are disposed at the boundaries between the two corresponding upper and lower extending portions. Each non-filled portion 67 has a concave surface that is recessed inward from each of the two corresponding upper and lower extending portions.

[0072] Furthermore, as shown in FIG. 8, a portion of the main body seal portion 26 is disposed in the vertical center of the first side surface vertical extension portion 61b. This makes it possible to suppress the amount of expansion of the first side surface vertical extension portion 61b and therefore the first side surface portion 20c toward the left. Therefore, the first side surface portion 20c can be formed into a shape closer to a flat surface, and the container body 20 can be more reliably formed into a substantially rectangular parallelepiped shape (polygonal prism shape). Similarly, a portion of the main body seal portion 26 is located in the vertical center of the first side surface side vertical extension portion 62b, a portion of the main body seal portion 26 is located in the vertical center of the second side surface side vertical extension portion 61d, and a portion of the main body seal portion 26 is located in the vertical center of the second side surface side vertical extension portion 62d. This makes it possible to suppress the amount of expansion of the first side surface portion 20c toward the left and the amount of expansion of the second side surface portion 20d toward the right, so that the first side surface portion 20c and the second side surface portion 20d can each be formed into a shape closer to a flat surface. This makes it possible to more reliably form the container body 20 into a substantially rectangular parallelepiped shape (polygonal prism shape). More specifically, the main body seal portion 26 includes a plurality of (for example, four) horizontal seal portions 26b extending in the left-right direction. One horizontal seal portion 26b is disposed at the center in the up-down direction of each of the first side surface side vertical extending portion 61b, the first side surface side vertical extending portion 62b, the second side surface side vertical extending portion 61d, and the second side surface side vertical extending portion 62d. Each horizontal seal portion 26b is formed, for example, in a ring shape that is long in the front-rear direction. The inner region of the horizontal seal portion 26b is a non-filled portion 67. Therefore, in the case of this embodiment, a non-filled portion 67 that is long in the front-rear direction is disposed in the center in the vertical direction of each of the first side surface side vertical extension portion 61b, the first side surface side vertical extension portion 62b, the second side surface side vertical extension portion 61d, and the second side surface side vertical extension portion 62d.

[0073] In the case of this embodiment, the inner bag forming sheet material 41 is formed in the same shape as the main body forming sheet material 21 except for the extending portion 25 . 7, the seal boundary 41a of the inner bag sheet material 41 is shown by a two-dot chain line for the sake of convenience. The seal boundary 41a is a boundary between the area where the inner bag sheet material 41 is joined (sealed) to the main body sheet material 21 and other areas of the inner bag sheet material 41, and is also a boundary between the area where the inner bag sheet materials 41 are joined together when the sheet material container 100 is formed using the container sheet material 51 and other areas of the inner bag sheet material 41. In this embodiment, the position of the seal boundary line 41a and the position of the seal boundary line 21c correspond to each other (overlap with each other).

[0074] In the portion of the inner bag-constituting sheet material 41 that overlaps with the top gusset-constituting sheet portion 34, an insertion hole 41b is formed through which the tubular portion 15a of the spout 15 is inserted. The flange portion 15b of the spout 15 is joined, for example, to the inner surface of the portion of the inner bag forming sheet material 41 that overlaps with the top gusset forming sheet portion 34. The tube portion 15a protrudes through an insertion hole 41b of the inner bag forming sheet material 41 and an insertion hole 21a of the top gusset forming sheet portion 34 toward the outer surface side of these sheets.

[0075] 8, the container-constituting sheet material 51 is folded in a valley direction at folding lines 81, 82, and 84, and folded in a mountain direction at folding lines 83 and 85, and the peripheral portions (peripheral seal portions 52) of the container-constituting sheet material 51 (the inner bag-constituting sheet materials 41) are joined together, whereby the container-constituting sheet material 51 is formed into a double-layered bag shape. The container-constituting sheet material 51 is mountain-folded at folding line 83, forming crease 98a, and the container-constituting sheet material 51 is mountain-folded at folding line 83, forming crease 98b. Here, a valley fold is a fold that is convex toward the back side in FIG. 8, and a mountain fold is a fold that is convex toward the front side in FIG. That is, the edges of the inner bag constituent sheet material 41 are joined to form an inner bag seal portion 42 (see Figure 1), and an inner bag 40 is formed by the inner bag constituent sheet material 41, and a bag-shaped container body 20 that covers the inner bag 40 is also formed. Examples of the method for joining the inner bag constituent sheet materials 41 include heat sealing, ultrasonic sealing, and joining with an adhesive. In this embodiment, the main body peripheral seal portion 28, the inner bag seal portion 42, and the inner and outer seal portions 43 are arranged in corresponding positions (overlapping positions) to each other. The main body peripheral seal portion 28, the inner bag seal portion 42, and the inner and outer seal portions 43 are collectively referred to as the peripheral seal portion 19 (the peripheral seal portion 19 includes the main body peripheral seal portion 28, the inner bag seal portion 42, and the inner and outer seal portions 43). Therefore, in this embodiment, each of the top gusset peripheral seal portion 45, the first side edge seal portion 46 and the second side edge seal portion 47 is composed of a main body peripheral seal portion 28, an inner bag seal portion 42 and an inner and outer seal portion 43. However, the present invention is not limited to this example, and each of the top gusset peripheral seal portion 45, the first side edge seal portion 46 and the second side edge seal portion 47 may be composed of the main body peripheral seal portion 28 only.

[0076] In the front side constituent sheet part 31, a portion closer to the top gusset constituent sheet part 34 than the folding line 85 is a first overlapping part 31c. Before the non-joint part 24 is filled with the filler, the first overlapping part 31c is arranged to overlap one half of the top gusset constituent sheet part 34. In the back surface side sheet part 32, the part located farther from the bottom surface sheet part 33 than the folding line 86 is the second overlapping part 32c. Before the non-jointed part 24 is filled with the filler, the second overlapping part 32c is arranged overlapping with the other half of the top gusset sheet part 34.

[0077] In this way, the container-constituting sheet material 51 is formed into a double bag shape, and the sheet material container 100 (before filling with the filler material) is obtained. In the sheet material container 100, for example, the filler material is injected into the non-jointed portion 24 from the injection port 25a formed in the extending portion 25, and then the non-jointed portion 24 is sealed at the base end of the extending portion 25. As a result, the filler material is enclosed in the non-jointed portion 24 (filled portion 60). The pressure inside the filling section 60 is not particularly limited, but is preferably higher than atmospheric pressure, and can be, for example, 10 kPa or more and 500 kPa or less (gauge pressure). After the filling portion 60 in which the filling material is enclosed is formed, for example, the extension portion 25 is cut off. In this way, the sheet material container 100 is obtained in which the filler is sealed in the filling portion 60. However, even in the state of the sheet material container 100 in which the filler is sealed, the extension portion 25 may remain.

[0078] After the sheet material container 100 is produced, the contents are filled into the storage area 17 through the tubular portion 15a of the spout 15, and then the cap portion 70 is attached to the spout 15 to obtain the sheet material container 100 with the contents sealed in the storage area 17.

[0079] Here, it is preferable that the thickness of the portion where the front side vertical extension portion 61a and the first side surface side vertical extension portion 61b communicate with each other in the vertical center is thinner than the thickness of the first protrusion portion 65a. This allows the filling section 60 to be easily bent at a location corresponding to the boundary (first edge portion 16a) between the front section 20a and the first side section 20c. When a filling material is filled into the filling section 60, the front side vertical extension section 61a and the first side section vertical extension section 61b bend at their boundary (non-filled section 67 of the first edge portion 16a), and the front section 20a and the first side section 20c cross each other. That is, a shape in which the front section 20a and the first side section 20c are substantially perpendicular to each other can be more reliably achieved. More specifically, since the filling portion 60 is easily bent at the portion corresponding to the first side portion 16a, the filling portion 60 is pulled by the tensile force generated when the filling portion 60 expands, and the main body sheet material 21 is folded at the boundary between the front side vertical extending portion 61a and the first side surface side vertical extending portion 61b, i.e., the non-filling portion 67. During this process, the non-filling portion 67 is deformed into an inwardly concave shape. Similarly, the thickness of the portion where the front side vertical extension portion 61c and the second side surface side vertical extension portion 61d communicate with each other in the vertical center is preferably thinner than the thickness of the third protrusion portion 65c. In addition, it is preferable that the thickness of the portion where the rear side vertical extending portion 62a and the first side surface side vertical extending portion 62b connect to each other at the center in the vertical direction is thinner than the thickness of the fifth protrusion 65e, and it is preferable that the thickness of the portion where the rear side vertical extending portion 62c and the second side surface side vertical extending portion 62d connect to each other at the center in the vertical direction is thinner than the thickness of the fifth protrusion 65e. This allows the filling section 60 to bend easily at the locations corresponding to the second side-shaped portion 16b to the fourth side-shaped portion 16d. When a filling material is filled into the filling section 60, the filling section 60 bends at the boundaries between the planar portions (the non-filled portions 67 of the second side-shaped portion 16b to the fourth side-shaped portion 16d). This makes it possible to more reliably form the container body 20 into a substantially rectangular parallelepiped shape in which adjacent faces are substantially perpendicular to each other.

[0080] Second Embodiment Next, a second embodiment will be described with reference to FIGS. The sheet material container 100 of this embodiment differs from the sheet material container 100 of the first embodiment described above in the points described below, but in other respects is configured in the same way as the sheet material container 100 of the first embodiment described above.

[0081] In the case of this embodiment, as shown in FIG. 10, the sheet material container 100 further includes a protective cover 90 made of a film for covering the outer surface of the container body 20 . As a result, the container body 20 is structured to be reinforced by the protective cover 90, so that even if force is applied in the vertical direction to the sheet material container 100 due to being dropped, etc., the container body 20 can be more reliably prevented from being deformed (crushed) in the horizontal direction. Moreover, since deformation of the container body 20 can be suppressed, the formation of a gap between the container body 20 and the protective cover 90 can be suppressed. As shown in FIG. 10, the upper end of the protective cover 90 is located below the first front lower edge seal portion 48a, the first back lower edge seal portion 49a and the intersection 46b with the first edge seal portion 46. This results in a structure in which the intersection 46b of the first front lower edge seal portion 48a, the first back lower edge seal portion 49a, and the first edge seal portion 46 is covered by the protective cover 90. This makes it possible to satisfactorily maintain the state in which one side edge 31a of the front side constituent sheet portion 31 is joined to one side edge 32a of the back side constituent sheet portion 32, the state in which one side edge of the half portion 33a of the bottom constituent sheet portion 33 on the front side constituent sheet portion 31 side is joined to one side edge 31a of the front side constituent sheet portion 31, and the state in which one side edge of the half portion 33b of the bottom constituent sheet portion 33 on the back side constituent sheet portion 32 side is joined to one side edge 32a of the back side constituent sheet portion 32. Similarly, the upper end of the protective cover 90 is located above the intersection 47b with the second front lower edge seal portion 48b, the second back lower edge seal portion 49b, and the second edge seal portion 47, and the lower end of the protective cover 90 is located below the intersection 47b with the second front lower edge seal portion 48b, the second back lower edge seal portion 49b, and the second edge seal portion 47. This results in a structure in which the intersection 47b of the second front lower edge seal portion 48b, the second back lower edge seal portion 49b, and the second edge seal portion 47 is covered by the protective cover 90. This makes it possible to satisfactorily maintain the state in which the other side edge 31b of the front side constituent sheet portion 31 and the other side edge 32b of the back side constituent sheet portion 32 are joined, the state in which the other side edge of the half portion 33a of the bottom constituent sheet portion 33 on the front side constituent sheet portion 31 side and the other side edge 31a of the front side constituent sheet portion 31 are joined, and the state in which the other side edge of the half portion 33b of the bottom constituent sheet portion 33 on the back side constituent sheet portion 32 side and the other side edge 32a of the back side constituent sheet portion 32 are joined.

[0082] One example of the protective cover 90 is a shrink label. In this case, a shrink label formed in advance into a cylindrical shape is placed on the body 11 of the sheet material container 100, and then the shrink label is shrunk to fit closely to the body 11. Here, in the case of this embodiment, the side surfaces (front portion 20a, back portion 20b, first side portion 20c, and second side portion 20d) of the container body 20 are formed with vertical extending portions (front side vertical extending portion 61a to second side side vertical extending portion 62d) that extend vertically, so that deformation (crushing) of the container body 20 can be suppressed when the shrink label is shrunk.

[0083] However, the protective cover 90 may be, for example, a shrink label, a roll label or a stretch label. When the protective cover 90 is a roll label, the roll label is wrapped around the body 11 of the sheet material container 100, one end and the other end of the roll label are attached with an adhesive, and the roll label is attached in close contact with the body 11. If the protective cover 90 is a stretch label, when a stretch label formed in advance into a cylindrical shape is placed over the body of the sheet material container 100, the stretch label is attached in a tight contact state to the body 11 due to the elasticity (rubber elasticity) of the stretch label.

[0084] Furthermore, the material of the protective cover 90 is not particularly limited, but when the protective cover 90 is a shrink label, it is preferable that the protective cover 90 is composed of a resin layer made of a single material selected from recycled PET (polyethylene terephthalate), recycled OPP (oriented polypropylene), recycled OPS (biaxially oriented polystyrene), or recycled LDPE (low density polyethylene). When the protective cover 90 is a roll-up label, the protective cover 90 is preferably made of a polypropylene resin layer. When the protective cover 90 is a stretch label, the protective cover 90 is preferably composed of a resin layer of LLDPE (linear low density polyethylene).

[0085] It is preferable that the protective cover 90, for example, surrounds the entire circumference of the body 11. In this way, the protective cover 90 can realize a structure in which the container body 20 is more sufficiently reinforced. More specifically, in this embodiment, the protective cover 90 covers the entire surface of each of the four planar portions of the body portion 11 (the front portion 20a, the back portion 20b, the first side portion 20c, and the second side portion 20d). This makes it possible to realize a structure in which the container body 20 is further favorably reinforced by the protective cover 90. In addition, by configuring the surface of the protective cover 90 to be printed, it is possible to ensure more surfaces in the sheet material container 100 on which a marking portion, a pattern, or the like can be printed. Furthermore, as described above, the sheet material container 100 is reinforced by the front side vertical extending portion 61a to the second side surface side vertical extending portion 62d, thereby suppressing deformation (crushing). This also suppresses deformation of the protective cover 90, and furthermore, the visibility of the markings, patterns, etc. applied to the surface of the protective cover 90 and a good appearance can be more reliably maintained.

[0086] Moreover, the upper end of the protective cover 90 is preferably located above the fold 89a at the upper part of the front portion 20a. By doing this, the protective cover 90 can provide excellent protection for the upper parts of each of the front side vertical extending portions 61a to the second side side vertical extending portions 62d, and a structure in which the upper part of the container body 20 is more sufficiently reinforced can be realized.

[0087] Moreover, it is preferable that the protective cover 90 covers at least a portion of the ground surface 13 a of the bottom portion 13 . In this way, the annular filling portion 68 can be well protected by the protective cover 90. Therefore, the sheet material container 100 can be more reliably maintained in its self-supporting state.

[0088] In addition, it is preferable that the protective cover 90 covers at least a portion of the top gusset 14 . By doing so, the piercing strength of the top gusset 14 of the sheet material container 100 can be improved.

[0089] Furthermore, in the present embodiment, the first side portion 16a includes a concave surface surrounded by the front side vertical extension portion 61a and the first side surface vertical extension portion 61b. The protective cover 90 preferably covers the concave surface. By doing this, a gap is formed between the concave surface and the protective cover 90, and by combining this gap with the elasticity of the front side upper and lower extending portions 61a and the first side side upper and lower extending portions 61b, a softer gripping feel can be achieved for the sheet material container 100. More specifically, each of the first side portion 16a to the fourth side portion 16d preferably includes, for example, a concave surface, and the protective cover 90 preferably covers each concave surface. By doing so, it is possible to realize a softer gripping feeling over substantially the entire sheet material container 100 .

[0090] The timing for attaching the protective cover 90 to the sheet material container 100 may be before filling the contents, after filling the contents, before the cap portion 70 is attached to the spout 15, or after the cap portion 70 is attached to the spout 15.

[0091] The protective cover 90 is attached to the sheet material container 100 so as to be detachable from the sheet material container 100. Therefore, good recyclability of the sheet material container 100 can be realized.

[0092] The present invention is not limited to the above-described embodiment, and includes various modifications and improvements as long as the object of the present invention is achieved.

[0093] For example, the sheet material container 100 may not have the inner bag 40. In this case, the storage area 17 is formed by the container body 20. That is, at the peripheral seal portion 19, parts of the inner film layer 23 of the main body-constituting sheet material 21 are joined together to form the container body 20 and the storage area 17. In this case, for example, the outer surface 151 of the flange portion 15b is directly joined to the inner film layer 23 of the main body forming sheet material 21 by the main body seal portion 26.

[0094] In the above, the sheet material container 100 is a pump container having the pump portion 72, but the sheet material container 100 may be a container other than the pump container. For example, the sheet material container 100 may have a cap (such as a screw cap) that closes the cylindrical portion 15a.

[0095] Furthermore, the various components of the sheet material container 100 do not need to be independent entities individually, and it is acceptable for multiple components to be formed as a single member, for one component to be formed from multiple members, for one component to be part of another component, for part of one component to overlap with part of another component, etc.

[0096] Furthermore, the above-described embodiments and modifications can be combined as appropriate without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0097] 11 Torso 13 Bottom 13a Ground plane 14 Tenmachi 15 Spout 17 Containment Area 19 Peripheral seal 20 Container body 20a Front section 20b Back part 20c 1st side part 20d 2nd side part 21 Body construction sheet material 22 Outer film layer 23 Inner film layer 24 Non-joint part 26 Body seal 31 Front side component sheet section 32 Rear side component sheet section 33 Bottom construction sheet part 41 Inner bag constituent sheet material 46 First side edge seal 47 Second side edge seal 48a First front lower edge seal 48b Second front lower edge seal 49a First rear lower edge seal 49b Second rear lower edge seal 51 Container construction sheet material 60 Filling section 60a 1st vertical extension part 60b 2nd vertical extension part 60c 3rd vertical extension part 60d 4th vertical extension part 61a, 61c Front side vertical extension 61b, 62b First side vertical extension part 63 Upper horizontal extension 64 Lower horizontal extension 65a 1st protrusion 65b Second protrusion 65c 3rd protrusion 65d 4th protrusion 67 Unfilled area 89a, 89b folds 90 Protective Cover 100 Sheet material container

Claims

1. A sheet material container comprising one or more sheet materials including a body-constituting sheet material having an outer film layer and an inner film layer laminated to each other, a storage area for storing contents; a container body that is formed from the body-constituting sheet material and surrounds the storage area; Equipped with The container body has a body and a bottom, The main body constituent sheet material is A front side constituent sheet portion that constitutes the front side of the torso portion; A back side constituent sheet portion that constitutes the back side of the torso portion; A bottom surface forming sheet portion that forms the bottom portion; having The container body includes: A front portion formed by a central portion in a width direction of the front side constituent sheet portion; A first side surface portion including a portion of the front side sheet portion adjacent to one side of the front surface portion and intersecting the front surface portion; a first side edge seal portion in which one side edge of the front side constituent sheet portion and one side edge of the back side constituent sheet portion are indirectly or directly joined; having The front portion and the first side portion are perpendicular to each other, The first side edge seal portion is disposed at a center portion in a width direction of the first side surface portion, the main body sheet material has a main body seal portion where the outer film layer and the inner film layer are joined, and a non-joined portion where the outer film layer and the inner film layer are partially not joined, and a filling portion in which a filler can be enclosed between the outer film layer and the inner film layer in the non-joined portion, The filling section is A vertical extension portion extending vertically along a boundary between the front portion and the first side portion; a first protruding portion protruding from the vertical extending portion toward a center portion in a lateral width direction of the front portion at a vertical intermediate portion of the front portion; a second protruding portion protruding from the vertical extending portion toward the center portion in the width direction of the first side surface portion at a vertical intermediate portion of the first side surface portion; A sheet material container having a sheet material container.

2. The container body includes: The front side sheet portion includes a portion adjacent to the other side of the front portion, and has a second side portion intersecting the front portion, The filling section is a second vertical extension portion extending vertically along a boundary between the front portion and the second side portion; a third protruding portion protruding from the second vertical extending portion toward the center of the front portion in a width direction at a vertical center of the front portion; a fourth protruding portion protruding from the second vertical extending portion toward a center portion in a width direction of the second side surface portion at a center portion in a vertical direction of the second side surface portion; 2. The sheet material container of claim 1, comprising:

3. the first protrusion and the third protrusion are directly connected to each other, 3. The sheet material container according to claim 2, wherein the assembly of the first protrusion and the third protrusion extends in a lateral width direction of the front portion.

4. The filling section is an upper horizontal extending portion extending in a width direction from the vertical extending portion to the second vertical extending portion at an upper end of the front portion; a lower horizontal extending portion extending in a width direction from the vertical extending portion to the second vertical extending portion at a lower end of the front portion; 4. The sheet material container according to claim 2 or 3, comprising:

5. A sheet material container comprising one or more sheet materials including a body-constituting sheet material having an outer film layer and an inner film layer laminated together, a storage area for storing contents; a container body that is formed from the body-constituting sheet material and surrounds the storage area; Equipped with The container body has a body and a bottom, The main body constituent sheet material is A front side constituent sheet portion that constitutes the front side of the torso portion; A back side constituent sheet portion that constitutes the back side of the torso portion; A bottom surface forming sheet portion that forms the bottom portion; having The container body includes: A front portion formed by a central portion in a width direction of the front side constituent sheet portion; A first side surface portion including a portion of the front side sheet portion adjacent to one side of the front surface portion and intersecting the front surface portion; having the main body sheet material has a main body seal portion where the outer film layer and the inner film layer are joined, and a non-joined portion where the outer film layer and the inner film layer are partially not joined, and a filling portion in which a filler can be enclosed between the outer film layer and the inner film layer in the non-joined portion, The filling section is A vertical extension portion extending vertically along a boundary between the front portion and the first side portion; a first protruding portion protruding from the vertical extending portion toward a center portion in a lateral width direction of the front portion at a vertical intermediate portion of the front portion; a second protruding portion protruding from the vertical extending portion toward a center portion in a width direction of the first side surface portion at a vertical intermediate portion of the first side surface portion; having The vertical extension portion has a front vertical extension portion disposed on the front portion and extending vertically, and a first side vertical extension portion disposed on the first side portion and extending vertically, the front side vertical extension portion and the first side surface side vertical extension portion are mutually connected at an upper end portion, a central portion in the vertical direction, and a lower end portion, A sheet material container in which a thickness of a portion where the front side vertical extension portion and the first side side vertical extension portion communicate with each other at a center in the vertical direction is thinner than a thickness of the first protrusion portion.

6. 6. The sheet material container according to claim 5, wherein a portion of the main body seal portion is disposed in a vertical center portion of the first side vertical extension portion.

7. The container body includes: A back portion is formed by a central portion in a width direction of the back side constituent sheet portion, the first side surface portion further includes a portion of the back surface-side sheet portion adjacent to one side of the back surface portion, and intersects with the back surface portion, The filling section is a third vertical extension portion extending vertically along a boundary between the rear portion and the first side portion; a fifth protruding portion protruding from the third vertical extending portion toward a center portion in a width direction of the rear portion at a vertical intermediate portion of the rear portion; a sixth protruding portion protruding from the third vertical extending portion toward a center portion in a width direction of the first side surface portion at a vertical intermediate portion of the first side surface portion; 7. The sheet material container according to claim 1, further comprising:

8. The container body includes: The front side sheet portion includes a portion adjacent to the other side of the front portion, and has a second side portion intersecting the front portion, the second side surface portion further includes a portion of the back surface-side sheet portion adjacent to the other side of the back surface portion, and intersects with the back surface portion, The filling section is a fourth vertical extension portion extending vertically along a boundary between the rear portion and the second side portion; a seventh protruding portion protruding from the fourth vertical extension portion toward the center of the rear portion in the width direction at a vertical center of the rear portion; an eighth protruding portion protruding from the fourth vertical extending portion toward the center in the width direction of the second side surface portion at a vertical center of the second side surface portion; 8. The sheet material container of claim 7, comprising:

9. The sheet material container according to claim 1 , wherein the container body has a top gusset.

10. 10. The sheet material container according to claim 9, wherein the container body is substantially polygonal prism-shaped.

11. an inner bag disposed inside the container body and defining the storage area; The sheet material container according to any one of claims 1 to 10, wherein the inner bag is formed from an inner bag-constituting sheet material that is an innermost sheet material among the one or more sheet materials.

12. 12. The sheet material container according to claim 1, further comprising a protective cover made of a film and surrounding the entire periphery of the body portion.

Images