Standing pouch

Abstract

To provide a standing pouch which has improved self-standing capability.SOLUTION: In a standing pouch 10, spout 50 is mounted to a bottom part film so that the center of a pour-out cylindrical part 51 thereof is arranged at a position toward a first left / right side than a virtual line L connecting a left / right center of a bottom edge part 46a of a non-seal front side edge part 46 and a left / right center of a bottom edge part 47a of a non-sealed back side edge part 47 in a non-sealed region 45 in a front-back direction, and a part of the spout 50, a part of a front side seal outer edge part 42 and a part of a back side seal outer edge part 44 are configured to be self-standing as leg parts.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a stand-up pouch. [Background technology]

[0002] Conventionally, standing pouches have been widely used which include a front film, a back film, and a bottom film that is placed between the front and back films at the bottom of the pouch and is heat-welded to the front and back films by a bottom seal, and which can stand on its own with the bottom side facing down on a placing surface. The applicant has proposed in Patent Document 1 a standing pouch which takes advantage of the property that when a standing pouch is left standing, the contents accumulate on the bottom film side due to gravity, and which has a spout attached to the bottom film so that the contents can be poured out immediately by opening the spout. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-054957 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the standing pouch disclosed in Patent Document 1, depending on the design of the shape and dimensions of the outer edge of the bottom seal (the front seal area of ​​the bottom film and the outer edge of the front seal), the standing pouch may become unstable when placed on the supporting surface, and there is room for improvement in terms of the ability to stand on its own.

[0005] Therefore, the present invention is intended to solve these problems, and has an object to provide a standing pouch that has a simple structure and improves the ability to stand up on its own. [Means for solving the problem]

[0006] The present invention provides a standing pouch comprising a front film, a back film, a bottom film disposed between the front film and the back film at a bottom of the pouch and heat-sealed to the front film and the back film by a bottom seal, and a spout, wherein the bottom film has a front sealed region that is heat-sealed to the front film at the bottom seal, a back sealed region that is heat-sealed to the back film at the bottom seal, and a non-sealed region that is a region inside the front sealed region and the back sealed region, the non-sealed region has an unsealed front edge that is a boundary with the front sealed region, and an unsealed back edge that is a boundary with the back sealed region, the unsealed front edge and the unsealed back edge respectively extending from a bottom edge located at the outermost position in a front-back direction, and a first left-right side that is one of the left-right side sides, the spout has a first inclined edge portion formed so as to move inward in the front-back direction as it approaches the opposite side portion, and a second inclined edge portion extending from the bottom edge portion toward a second left-right side portion that is the other of the left-right side portions and formed so as to move inward in the front-back direction as it approaches the second left-right side portion; the spout is attached to the bottom film so that the center of its pouring tube portion is positioned closer to the first left-right side portion than an imaginary line connecting, in the front-back direction, the left-right center of the bottom edge portion of the unsealed front edge portion and the left-right center of the bottom edge portion of the unsealed back edge portion; the front sealed area has a front seal outer edge portion that is its outer edge, and the back sealed area has a back seal outer edge portion that is its outer edge; and the standing pouch is configured to be able to stand on its own using a part of the spout, a part of the front seal outer edge portion, and a part of the back seal outer edge portion as legs. In the above-mentioned standing pouch, the outer edge portion of the front seal and the outer edge portion of the back seal may each have an outer edge convex portion located at the outermost side in the front-to-back direction, and an outer edge relief portion formed on the second left-right direction side of the outer edge convex portion and located more inward in the front-to-back direction than the outer edge convex portion. In any of the above standing pouches, the outer edge relief portion may have a linear outer edge inclined portion that is inclined so as to move inward in the front-to-back direction toward the second left-right direction side portion. In any of the above standing pouches, the outer edge convex portion may be formed at a position closer to the second left-right side portion than the left-right center of the bottom film. In any of the above-mentioned standing pouches, the spout may be attached to the bottom film so that the center of its pouring tube portion is located closer to the first left-right side portion than the left-right center of the bottom film. In any of the above standing pouches, the bottom edge portion may be formed at a position closer to the second left-right side portion than the left-right center of the bottom film. In any of the above-described standing pouches, the standing pouch may have side seals on both left and right sides, and the side seals may have volume-adjusting inner edge portions that are inclined so that the left-right distance between the inner edges of the left and right side seals narrows as the pouch extends upward. Effect of the Invention

[0007] According to the present invention, it is possible to improve the self-supporting property with a simple configuration. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a plan view showing a standing pouch according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing each film that constitutes the standing pouch. [Diagram 3] FIG. [Figure 4] FIG. 13 is an explanatory diagram showing a modified example of the bottom film. [Diagram 5] FIG. 13 is an explanatory diagram illustrating a state in which the standing pouch is placed on the support surface. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A standing pouch 10 according to one embodiment of the present invention will be described below with reference to the drawings.

[0010] The standing pouch 10 is for containing viscous liquid contents such as mayonnaise or liquid detergent, and as shown in Figures 1 and 2, is equipped with a front film 20 and a back film 30 arranged opposite each other in the front-to-back direction, a bottom film 40 arranged in a folded state in two between the films 20, 30 at the bottom of the pouch and heat-welded to the films 20, 30 by a bottom seal 13, and a spout 50 that functions as an outlet for the contents.

[0011] As shown in FIG. 1, standing pouch 10 is formed by a top seal 11 formed by heat welding films 20, 30 at the top of the pouch, side seals 12 formed by heat welding films 20, 30 on both sides of the pouch, and a bottom seal 13 formed by heat welding films 20, 30 and bottom film 40 at the bottom of the pouch, thereby forming a bag-like shape having a contents storage section 14 for storing contents.

[0012] Furthermore, at a predetermined location (e.g., location A shown in FIG. 1) on the left-right side of the pouch in the region where bottom seal 13 is formed, a portion (cutout portion) is formed by partially removing bottom film 40, and front film 20 and back film 30 are heat-sealed. This prevents films 20, 30 from separating at the above-mentioned predetermined location (e.g., location A shown in FIG. 1), and bottom seal 13 functions as a leg portion for supporting standing pouch 10 on the placement surface with the pouch bottom side facing down. For convenience of illustration, the above-mentioned portion where bottom film 40 is partially removed is not shown in FIGS. 2 to 4.

[0013] As shown in Figure 3, the bottom film 40 has a front seal area 41 that is heat-sealed to the front film 20 at the bottom seal 13, a back seal area 43 that is heat-sealed to the back film 30 at the bottom seal 13, and a non-seal area 45 that is an area inside the front seal area 41 and the back seal area 43 and is not welded to the films 20, 30.

[0014] As shown in Figure 3, the front seal area 41 has a front seal outer edge 42, which is the outer edge that faces the front side in the front-to-back direction when the bottom film 40 is unfolded and viewed in a plane (facing downward when the standing pouch 10 is in a self-supporting position). In addition, as shown in Figure 3, the back seal area 43 has a back seal outer edge 44, which is its outer edge facing the back side in the front-to-back direction when the bottom film 40 is unfolded and viewed in a plane (facing downward when the standing pouch 10 is in a self-supporting position).

[0015] As shown in Figure 3(a), the seal outer edge portions 42, 44 each have an outer edge protrusion 42a, 44a, an outer edge inclined portion 42b, 44b formed on the first left-right side portion (left side of the paper) of the outer edge protrusion 42a, 44a, and an outer edge relief portion 42c, 44c formed on the second left-right side portion (right side of the paper) of the outer edge protrusion 42a, 44a.

[0016] As shown in Figure 3(a), the outer edge convex portions 42a, 44a are the portions that are located outermost in the front-to-back direction of the seal outer edge portions 42, 44 when the bottom film 40 is unfolded and viewed in a plane (the portions that are located at the bottom when the standing pouch 10 is standing upright). In this embodiment, the outer edge protrusions 42a, 44a are formed in a dot shape, and the vicinity of the outer edge protrusions 42a, 44a is formed in a convex curved shape with the outer edge protrusions 42a, 44a as apexes. The outer edge protrusions 42a, 44a are formed at positions closer to the second left-right side (the right side on the page) than to the left-right center of the bottom film 40.

[0017] As shown in Figure 3(a), the outer edge inclined portions 42b, 44b are formed with an incline so that when the bottom film 40 is unfolded and viewed in a plane, it moves inward in the front-to-back direction toward the first left-to-right side portion (left side of the paper) (when the standing pouch 10 is in a self-supporting state, it moves upward toward the first left-to-right side portion (left side of the paper)). As shown in Figures 1 to 3, these outer edge inclined portions 42b, 44b are curved so that they bulge outward in the front-to-back direction when the bottom film 40 is unfolded and viewed in a plane (they bulge downward when viewed in the front-to-back direction when the standing pouch 10 is in a self-supporting state). As shown in FIG. 1, outer edge inclined portions 42b, 44b are formed so that a part of spout 50 is exposed when viewed from the front to the back with contents contained in content-accommodating portion 14.

[0018] As shown in Figure 3(a), when the bottom film 40 is unfolded and viewed in a plane, the outer edge escape portions 42c, 44c are located further inward in the front-to-back direction than the outer edge protrusions 42a, 44a (located above the outer edge protrusions 42a, 44a when the standing pouch 10 is in a self-supporting position). The outer edge escape portions 42c, 44c have linear outer edge inclined portions 42d, 44d that are inclined so as to move inward in the front-to-back direction toward the second left-right side portion (right side of the paper) when the bottom film 40 is unfolded and viewed in a plane (when the standing pouch 10 is in a self-supporting position, they move upward toward the second left-right side portion (right side of the paper)), and in this embodiment, the entire (or almost entire) area of ​​the outer edge escape portions 42c, 44c is composed of linear outer edge inclined portions 42d, 44d.

[0019] In this embodiment, as shown in Figure 3(a), the seal outer edge portions 42, 44 are formed linearly symmetrically in the vertical direction of the paper in Figure 3 (symmetrical in the front-to-back direction) with respect to a virtual line (valley fold portion 40a) extending in the left-to-right direction; more specifically, the entire bottom film 40 is formed linearly symmetrically in the vertical direction of the paper in Figure 3 (symmetrical in the front-to-back direction) with respect to a virtual line (valley fold portion 40a) extending in the left-to-right direction.

[0020] Next, the configuration of the non-sealed area 45 of the bottom film 40 will be described below.

[0021] As shown in FIG. 3(b), the non-sealed area 45 has a non-sealed front edge 46 which is the boundary with the front sealed area 41, and a non-sealed back edge 47 which is the boundary with the back sealed area 43.

[0022] As shown in FIG. 3(b), when the bottom film 40 is unfolded and viewed in plan, the unsealed front edge 46 and the unsealed back edge 47 are formed by a bottom edge 46a, 47a (in this embodiment, a dot-shaped) that is located on the outermost side in the front-back direction of the unsealed front edge 46 or the unsealed back edge 47 (located at the lowest position when the standing pouch 10 is self-supporting) and a bottom edge 46b that extends from the bottom edge 46a, 47a toward a first left-right side portion (left side of the paper), which is one of the left-right sides, and that extends in the front-back direction toward the first left-right side portion (left side of the paper) when the bottom film 40 is unfolded and viewed in plan. The bottom film 40 has first inclined edges 46b, 47b that are formed so as to lean toward the inside in the front-to-back direction (so as to lean upward toward the first left-to-right side when the standing pouch 10 is standing upright), and second inclined edges 46c, 47c that extend from the bottom edges 46a, 47a toward the second left-to-right side (the right side of the paper), which is the other of the left-to-right sides, and that are formed so as to lean toward the inside in the front-to-back direction as they lean toward the second left-to-right side (the right side of the paper) when the bottom film 40 is unfolded and viewed in a planar view (so as to lean upward toward the second left-to-right side when the standing pouch 10 is standing upright).

[0023] As shown in Figure 3(b), the non-sealed front side edge 46 and the non-sealed back side edge 47 are both formed such that the left-right center of the bottom edges 46a, 47a (in this embodiment, the entire bottom edges 46a, 47a) is positioned closer to the second left-right side (right side of the paper) than the left-right center of the bottom film 40, so that the left-right width of the second inclined edge 46c, 47c (on the right side of the paper) is narrower than the left-right width of the first inclined edge 46b, 47b (on the left side of the paper). In addition, the first inclined edge portions 46b, 47b and the second inclined edge portions 46c, 47c are formed in a curved line shape that bulges outward in the front-to-back direction when the bottom film 40 is unfolded and viewed in a plane, as shown in Figure 3(b) (when the standing pouch 10 is in a self-supporting state and viewed in the front-to-back direction, it bulges downward). Furthermore, when the first inclined edge portions 46b, 47b and the second inclined edge portions 46c, 47c are formed into curved lines in this manner, when contents are placed into the standing pouch 10, the bottom film 40 is more likely to spread in the front-to-back direction, making it possible to increase the amount of contents that can be accommodated and to improve the self-supporting ability of the standing pouch 10 (i.e., since it is possible to separate the outer edge convex portions 42a, 44a in particular in the front-to-back direction, the self-supporting ability of the standing pouch 10 can be improved).

[0024] 3, a valley fold 40a is formed in the bottom film 40 for folding the bottom film 40 in two, and this valley fold 40a is formed to extend along the left-right direction in the center of the bottom film 40 in the front-back direction. Naturally, after the spout 50 is attached to the bottom film 40, the bottom film 40 is not folded at the valley fold 40a in the vicinity of where the spout 50 is attached. As shown in FIG. 3, the bottom film 40 has a through hole 40b formed therein for allowing the pouring tube portion 51 of the spout 50 to pass therethrough.

[0025] In this embodiment, as shown in FIG. 3(b), the non-sealed front edge 46 and the non-sealed back edge 47 are formed to be linearly symmetrical in the up-down direction of the paper in FIG. 3 (symmetrical in the front-back direction) with respect to an imaginary line (valley fold 40a) extending in the left-right direction. The left-right center of the bottom edge 46a of the non-sealed front edge 46 and the left-right center of the bottom edge 47a of the non-sealed back edge 47 are formed at the same position in the left-right direction, so that the imaginary line L extends parallel to the front-back direction.

[0026] The spout 50 is formed from a synthetic resin such as PE or PP, and as shown in FIG. 1, has a pouring tube portion 51 formed in a tubular shape (cylindrical in this embodiment), a flange portion 52 extending outward from one end of the pouring tube portion 51, and a cap portion 53 removably attached to the other end side of the pouring tube portion 51.

[0027] In this embodiment, the flange portion 52 is formed in a disk shape with a through hole in its center, as shown in Figure 1, and is placed inside the pouch and heat-welded to the inner surface of the bottom film 40 (the surface facing the content storage section 14). In addition, when viewed in the axial direction of the pouring tubular portion 51, the spout 50 is formed so that the pouring tubular portion 51 is located in the center of the flange portion 52 (the center of the pouring tubular portion 51 coincides with the center of the flange portion 52).

[0028] As can be seen from Figures 1 and 3(b), the spout 50 is attached to the bottom film 40 so that the center of its pouring tube portion 51 (the center of the pouring hole when viewed in the extension direction of the pouring hole of the pouring tube portion 51) is positioned closer to the first left-right side (left side on the page) than an imaginary line L that connects, in the front-back direction, the left-right center of the bottom edge portion 46a of the non-sealed front side edge portion 46 and the left-right center of the bottom edge portion 47a of the non-sealed front side edge portion 47. Furthermore, more specifically, in this embodiment, the spout 50 is attached to the bottom film 40 so that the entire pouring tube portion 51 is positioned closer to the first left-right side (left side on the paper) than the imaginary line L. More specifically, in this embodiment, the spout 50 is attached to the bottom film 40 so that the entire flange portion 52 is positioned closer to the first left-right side (left side of the paper) than the imaginary line L. In this way, when the entire flange portion 52 is attached to the bottom film 40 at a position closer to the first left-right side than the imaginary line L (a position away from the imaginary line L to the first left-right side), it is more preferable because it can suppress the occurrence of unexpected wrinkles in the bottom film 40. That is, when the contents are placed in the content storage section 14 and the standing pouch 10 is made to stand on its own, the part of the bottom film 40 near the imaginary line L is the part that is most convex (mountain-shaped) curved downward when viewed in the front-back direction. Therefore, by attaching the flange portion 52 to a relatively flat part of the bottom film 40 while avoiding the vicinity of the imaginary line L, it is possible to suppress the occurrence of unexpected wrinkles in the bottom film 40. Furthermore, as can be seen from Figures 1 and 3(b), the spout 50 is attached to the bottom film 40 so that the center of its pouring tube portion 51 (in this embodiment, the entire pouring tube portion 51, and more specifically, the entire flange portion 52) is located closer to the first left-right side portion (left side of the paper) than the left-right center of the bottom film 40.

[0029] As described above, the spout 50 is attached to the bottom film 40 at a position closer to the first left-right side (left side on the paper) than the imaginary line L. In other words, when the standing pouch 10 is supported on the supporting surface P with the bottom side of the pouch facing down (with contents placed in the content storage section 14), the spout 50 (as a whole) is attached to a portion of the bottom film 40 that is inclined so that it moves upward as it approaches the first left-right side (left side on the paper) when viewed in the front-back direction. Therefore, when the standing pouch 10 is supported on the supporting surface P, as can be seen from Figure 1, when viewed in the front-back direction, the axis of the spout 50 (pouring / discharging tube section 51) is inclined with respect to the up-down direction, that is, it extends diagonally with respect to the up-down direction (and left-right direction) so that it moves toward the outside in the left-right direction as it moves downward.

[0030] In addition, as shown in FIG. 1, each of the left and right side seals 12 is formed with a volume-adjusting inner edge portion 12a that is inclined so that the left-right distance between the inner edges of the left and right side seals 12 narrows as it extends upward (specifically, is inclined so as to move inward in the left-right direction as it extends upward). This volume-adjusting inner edge portion 12a is formed at a position that comes into contact with the contents when the bottom side of the unopened standing pouch 10 containing the contents in the contents storage portion 14 is facing downward. In this embodiment, as shown in FIG. 1, the outer edge of the side seal 12 is provided with an inclined outer edge 12b that is inclined so as to move inward in the left-right direction as it extends upward, in the portion that is located outside the volume adjustment inner edge 12a in the left-right direction. By forming the inclined outer edge 12b, the width of the upper part of the pouch becomes narrower, making it easier to grip with the hand. Also, by forming the volume-adjusting inner edge 12a, when the spout 50 is opened to dispense the contents, the contents can be prevented from rising to the upper part of the pouch as much as possible, improving the squeezing ability even when the contents are reduced. The volume adjusting inner edge portion 12a and the inclined outer edge portion 12b may be formed on only one of the left and right side seals 12. At least one of the volume adjusting inner edge portion 12a and the inclined outer edge portion 12b as described above does not have to be formed.

[0031] The standing pouch 10 of this embodiment obtained in this manner is configured to be able to stand on its own when the standing pouch 10 with contents placed in the content storage section 14 is made to function as legs that ground against the placement surface P, with a portion of the spout 50 (in this embodiment, the grounding point 53a of the cap section 53 shown in FIG. 1 and FIG. 5), a portion of the front seal outer edge 42 (in this embodiment, the outer edge convex section 42a and the outer edge relief section 42c), and a portion of the back seal outer edge 44 (in this embodiment, the outer edge convex section 44a and the outer edge relief section 44c) as shown in FIG. 1 and FIG. 5 (i.e., various designs such as the dimensional relationships and angular relationships of each part are set so that each of these parts can function as a leg). This allows the standing pouch 10 to be able to stand upright with a simple configuration, and by using part of the spout 50 as a leg, the design freedom of the seal outer edges 42, 44 can be improved. In other words, if the spout 50 is not used as a leg and only the seal outer edges 42, 44 are made to function as legs, the seal outer edges 42, 44 would need to be grounded over a wide area to the mounting surface P to stabilize the free-standing state, which would restrict the design freedom of the seal outer edges 42, 44. In contrast, in this embodiment, the spout 50 is used as a leg, thereby improving the design freedom of the seal outer edges 42, 44. FIG. 1 shows the standing pouch 10 in a self-supporting state with contents accommodated in the contents accommodation section 14 (i.e., the standing pouch 10 inflated by accommodating the contents).

[0032] As shown in FIG. 3(a), the seal outer edge portions 42, 44 each have an outer edge protrusion 42a, 44a located on the outermost side in the front-to-back direction, and an outer edge recess 42c, 44c formed on the second left-right side (right side of the paper) of the outer edge protrusion 42a, 44a and located more inward in the front-to-back direction than the outer edge protrusion 42a, 44a. In this way, by forming outer edge escape portions 42c, 44c on the second left-right side portion side (right side on the paper) of outer edge protrusions 42a, 44a, when contents are contained in the content storage section 14, it is possible for the outer edge protrusions 42a, 44a, where the separation distance D in the front-back direction between the front side seal outer edge portion 42 and the back side seal outer edge portion 44 is larger than near the second left-right side portion (right end portion on the paper) of the seal outer edge portions 42, 44, as shown in Figure 5, to come into contact with the mounting surface P, thereby stabilizing the free-standing state. In other words, by forming outer edge escape portions 42c, 44c on the second left-right side side (right side on the paper) of the outer edge convex portions 42a, 44a, it is possible to prevent only the vicinity of the second left-right side portion (right end portion on the paper) of the seal outer edge portions 42, 44, where the separation distance D in the front-to-back direction of the seal outer edge portions 42, 44 is small, from coming into contact with the mounting surface P, thereby stabilizing the free-standing state.

[0033] In addition, as shown in FIG. 3(a), the outer edge escape portions 42c, 44c have linear outer edge inclined portions 42d, 44d that are inclined so as to move inward in the front-back direction toward the second left-right side portion (the right side of the paper). As a result, when the standing pouch 10 is made to stand on its own, as shown in Figures 1 and 5, in addition to the outer edge convex portions 42a, 44a, the outer edge inclined portions 42d, 44d can be grounded to the supporting surface P, thereby stabilizing the standing pouch 10 in its standing state.

[0034] As shown in FIG. 3(a), the outer edge protrusions 42a, 44a are formed at a position closer to the second left-right side (the right side on the page) than to the left-right center of the bottom film 40. This allows the grounding portion 53a of the spout 50 on the placement surface P to be separated from the outer edge protrusions 42a, 44a in the left-right direction as shown in Figs. 1 and 5, thereby stabilizing the free-standing state.

[0035] Furthermore, as can be seen from Figure 3(a), the spout 50 is attached to the bottom film 40 so that the center of its pouring tube portion 51 is located closer to the first left-right side (left side of the paper) than the left-right center of the bottom film 40. This allows the grounding portion 53a of the spout 50 on the placement surface P to be separated from the outer edge protrusions 42a, 44a in the left-right direction as shown in Figs. 1 and 5, thereby stabilizing the free-standing state.

[0036] Additionally, bottom edges 46a, 47a of non-sealed area 45 are formed at a position closer to the second left-right side (right side on the page) than the left-right center of bottom film 40, as shown in FIG. 3(b). This makes the portion of the non-sealed area 45 wider on the first left-right side (left side of the paper) than the imaginary line L, and it is possible to improve the design freedom regarding the position at which the spout is attached to the non-sealed area 45 of the bottom film 40, thereby improving the operability of the spout 50, such as making it easier to open the cap portion 53 of the spout 50.

[0037] As shown in FIG. 1, the side seals 12 have volume adjusting inner edge portions 12a that are inclined so that the left-right distance between the inner edges of the left and right side seals 12 narrows toward the top. This makes it possible to guide the position of the contents in the contents storage section 14 downward, thereby improving the discharge of the contents from the spout 50 attached to the bottom of the pouch.

[0038] Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various design modifications can be made without departing from the present invention described in the claims, such as forming a standing pouch 10 by any combination of the respective configurations of the above or following embodiments and modified examples.

[0039] For example, in the specific embodiment of each of the films 20, 30, and 40, as long as it has a layer having thermal adhesion such as an olefin-based layer such as low-density polyethylene or polypropylene, or a polyester-based layer such as PET (polyethylene terephthalate) on at least one side, the thermal adhesion layer may be a single layer, or any layer may be laminated on the thermal adhesion layer. Any material may be used to form the laminate, and any material may be formed by laminating known polyesters such as PET or PBT (polybutylene terephthalate), polypropylene, polyamide, polyethylene, aluminum foil, etc. In addition, in the above-described embodiment, the bottom film 40 as a gusset film (gusset film) is described as being arranged only at the bottom of the pouch, but the specific aspect of the standing pouch 10 is not limited to this, and for example, a gusset film may also be arranged between the films 20, 30 on the top side of the pouch, in other words, a gusset portion may be formed on the top side of the pouch as well. In addition, in the above-described embodiment, the front film 20 and the back film 30 are described as being formed separately, but the front film 20 and the back film 30 may be integrally formed (the front film 20 and the back film 30 are formed as a single film), in which case the top seal 11 does not need to be formed.

[0040] In the above-described embodiment, as shown in FIG. 3(a), the outer edge portion 42 of the front seal and the outer edge portion 44 of the back seal are formed linearly symmetrically in the vertical direction of the paper in FIG. 3 (symmetrical in the front-back direction) with respect to a virtual line (valley fold portion 40a) extending in the left-right direction. However, the outer edge portion 42 of the front seal and the outer edge portion 44 of the back seal may be formed asymmetrically (asymmetrical in the front-back direction). In addition, in the above-mentioned embodiment, as shown in Figure 3(a), the outer edge convex portions 42a, 44a are described as being formed at a position closer to the second left-right side (right side on the paper) than the left-right center of the bottom film 40. However, the formation position of the outer edge convex portions 42a, 44a is not limited to the above, and for example, at least one of the outer edge convex portions 42a, 44a may be formed at a position closer to the first left-right side (left side on the paper) than the left-right center of the bottom film 40. In the above embodiment, the outer edge protrusions 42a, 44a are formed in a dot shape as shown in Fig. 3(a), but at least one of the outer edge protrusions 42a, 44a may be formed as a portion extending linearly in the left-right direction. In this case, it is preferable to form the entire outer edge protrusions 42a, 44a at a position closer to the second left-right side (the right side of the drawing surface) than the left-right center of the bottom film 40. In addition, in the above-described embodiment, the outer edge inclined portions 42b, 44b are described as being formed in a curved shape, but the specific form of the outer edge inclined portions 42b, 44b is not limited to this, and they may be configured as desired using any curved or straight line, or a combination thereof.

[0041] In the above-described embodiment, as shown in FIG. 3(a), the entire area (or almost the entire area) of the outer edge escape portions 42c, 44c is described as being composed of outer edge inclined portions 42d, 44d that are inclined so as to move inward in the front-to-back direction toward the second left-right side portion (the right side of the paper), but the specific form of the outer edge escape portions 42c, 44c may be any as long as the entire area is a portion that is located more inward in the front-to-back direction than the outer edge protrusions 42a, 44a. For example, as shown in FIG. 4(a) or FIG. 4(b), linear outer edge inclined portions 42d, 44d may be formed only in parts of the outer edge relief portions 42c, 44c. Even in this case, it is preferable to form the outer edge escape portions 42c, 44c so that the linear outer edge inclined portions 42d, 44d form legs when the contents are placed in the contents storage portion 14 and the standing pouch 10 is made to stand on its own. In addition, in the above-described embodiment, when the standing pouch 10 is made to stand on its own, in addition to the outer edge protrusions 42a, 44a, the outer edge relief portions 42c, 44c also function as legs that come into contact with the support surface P. However, when the standing pouch 10 is made to stand on its own, the outer edge relief portions 42c, 44c may not be brought into contact with the ground, and only the outer edge protrusions 42a, 44a may function as legs.

[0042] In addition, in the above-described embodiment, when the standing pouch 10 is made to stand on its own, a portion of the outer edge portions 42, 44 of the seal are described as being in direct contact with the supporting surface P and grounded, but it is not necessary for these portions of the outer edge portions 42, 44 of the seal to be in direct contact with the supporting surface P. In other words, either the films 20, 30 or the bottom film 40 may be caused to protrude outside the seal outer edges 42, 44 to form an unsealed portion of the films 20, 30 or the bottom film 40 outside the seal outer edges 42, 44, and when the standing pouch 10 is made to stand on its own, the unsealed portion may be brought into contact with the support surface P, so that a portion of the seal outer edges 42, 44 (via the unsealed portion) is grounded to the support surface P.

[0043] In the above embodiment, the bottom edges 46a, 47a of the non-sealed area 45 are formed as dots located at the outermost (lowest) of the edges 46, 47 in the front-back direction as shown in Fig. 3(b), but at least one of the bottom edges 46a, 47a may be formed as a portion extending linearly in the left-right direction. When the bottom edges 46a, 47a are formed as a portion extending linearly, it is preferable to attach the spout 50 to the bottom film 40 so that the entire flange portion 52 is positioned closer to the first left-right direction side (left side of the paper) than the imaginary line connecting the end of the bottom edge 46a on the first inclined edge 46b side and the end of the bottom edge 47a on the first inclined edge 47b side in the front-back direction. In the above embodiment, as shown in Fig. 3(b), the non-sealed front edge 46 and the non-sealed back edge 47 are formed symmetrically in the vertical direction of the paper in Fig. 3 (symmetrical in the front-back direction) with respect to a virtual line (valley fold 40a) extending in the left-right direction, but the non-sealed front edge 46 and the non-sealed back edge 47 may be formed asymmetrically in the vertical direction of the paper in Fig. 3 (symmetrical in the front-back direction), for example, the left-right center of the bottom edge 46a of the non-sealed front edge 46 and the left-right center of the bottom edge 47a of the non-sealed back edge 47 may be formed to be shifted in the left-right direction. In this case, the virtual line L extends obliquely with respect to the front-back direction. In addition, in the above-described embodiment, as shown in FIG. 3(b), the inclined edges 46b, 46c, 47b, and 47c of the non-sealed area 45 are formed in a curved line shape that bulges outward in the front-to-back direction when the bottom film 40 is unfolded and viewed in a plane (bulges downward when viewed in the front-to-back direction when the standing pouch 10 is in a self-supporting state). However, the specific form of the inclined edges 46b, 46c, 47b, and 47c is not limited to this, and at least one of the inclined edges 46b, 46c, 47b, and 47c may be configured as desired using any curve, straight line, or combination thereof. In the above embodiment, the edges 46, 47 are described as being formed such that the left-right center of the bottom edges 46a, 47a is positioned toward the second left-right side (the right side of the paper) so that the left-right width of the second inclined edges 46c, 47c (on the right side of the paper) is narrower than the left-right width of the first inclined edges 46b, 47b (on the left side of the paper), as shown in FIG. 3(a). However, it is also possible to form the edges 46, 47 in such a manner that the left-right width of the first inclined edges 46b, 47b is the same as the left-right width of the second inclined edges 46c, 47c. As shown, the left-right center of the bottom edges 46a, 47a may be formed at a position (left-right center of the pouch) that is not close to either the first left-right side (left side on the paper) or the second left-right side (right side on the paper), or the left-right center of the bottom edges 46a, 47a may be formed at a position closer to the first left-right side (left side on the paper) so that the left-right width of the second inclined edges 46c, 47c (on the right side on the paper) is wider than the left-right width of the first inclined edges 46b, 47b (on the left side on the paper).

[0044] In addition, in the above-described embodiment, the flange portion 52 of the spout 50 is described as being positioned within the pouch and heat-welded to the inner surface of the bottom film 40, but the manner in which the flange portion 52 is attached to the bottom film 40 is not limited to this, and for example, the flange portion 52 may be heat-welded to the outer surface of the bottom film 40 on the outside of the pouch, or the flange portion 52 may be attached to the bottom film 40 by a method other than heat welding, such as adhesion. In addition, in the above-described embodiment, the flange portion 52 of the spout 50 is described as being formed in a disk shape with a through hole formed in the center thereof, but the specific form of the flange portion 52 is not limited to this and may be any form. For example, the flange portion 52 may be formed to have an elliptical or rectangular outer edge. In addition, in the above-described embodiment, as can be seen from Figure 3, the flange portion 52 of the spout 50 is described as being positioned in the center of the bottom film 40 in the front-to-back direction, but the flange portion 52 may also be attached to a position shifted in either direction from the center of the bottom film 40 in the front-to-back direction. [Explanation of symbols]

[0045] 10 ··· Standing pouch 11 Top seal 12 Side seal 12a Volume adjustment inner edge 12b: Sloped outer edge 13 Bottom seal 14 Contents storage section 20 ··· Front film 30 ··· Back film 40 Bottom film 40a... Tanioribe 40b... Through hole 41 Front seal area 42: Outer edge of front seal 42a: Outer edge protrusion 42b: Outer edge inclined portion 42c Outer edge relief 42d: Outer edge inclination 43 Backside seal area 44 Back seal outer edge 44a: Outer edge protrusion 44b: Outer edge inclined portion 44c Outer edge relief 44d: Outer edge inclination 45 ··· Non-sealed area 46 Non-sealed front edge 46a...bottom edge 46b First inclined edge 46c Second beveled edge 47 Non-sealed back edge 47a...bottom edge 47b First inclined edge 47c Second beveled edge 50 ··· Spout 51 ... Pour cylinder part 52 Flange section 53 Cap part 53a Grounding point L Virtual line P: Placement surface

Claims

1. A standing pouch comprising a front film, a back film, a bottom film disposed between the front film and the back film at a bottom of the pouch and heat-sealed to the front film and the back film by a bottom seal, and a spout, the bottom film has a front-side sealed area that is heat-sealed to the front-side film at the bottom seal, a back-side sealed area that is heat-sealed to the back-side film at the bottom seal, and a non-sealed area that is an area inside the front-side sealed area and the back-side sealed area; The non-sealed area has a non-sealed front edge that is a boundary with the front sealed area, and a non-sealed back edge that is a boundary with the back sealed area, The non-sealed front edge portion and the non-sealed back edge portion each have a bottom edge portion located at the outermost side in the front-back direction, a first inclined edge portion extending from the bottom edge portion toward a first left-right side portion that is one of the left-right side portions and formed so as to move inward in the front-back direction toward the first left-right side portion, and a second inclined edge portion extending from the bottom edge portion toward a second left-right side portion that is the other of the left-right side portions and formed so as to move inward in the front-back direction toward the second left-right side portion, The spout is attached to the bottom film such that the center of the spout tube portion is positioned closer to the first left-right side portion than an imaginary line connecting the left-right center of the bottom edge portion of the non-sealed front edge portion and the left-right center of the bottom edge portion of the non-sealed back edge portion in the front-back direction, The front seal area has a front seal outer edge that is an outer edge thereof, The back seal area has an outer edge, which is a back seal outer edge, The standing pouch is characterized in that the pouch is configured to be able to stand on its own, using a portion of the spout, a portion of the outer edge of the front seal, and a portion of the outer edge of the back seal as legs.

2. The standing pouch according to claim 1, characterized in that the outer edge portion of the front seal and the outer edge portion of the back seal each have an outer edge convex portion located at the outermost side in the front-to-back direction, and an outer edge relief portion formed on the second left-right direction side of the outer edge convex portion and located more inward in the front-to-back direction than the outer edge convex portion.

3. 3. The standing pouch according to claim 2, wherein the outer edge relief portion has a linear outer edge inclined portion that is inclined so as to move inward in the front-to-back direction toward the second left-to-right side portion.

4. 3. The standing pouch according to claim 2, wherein the outer edge convex portion is formed at a position closer to the second left-right side portion than the left-right center of the bottom film.

5. The standing pouch according to claim 4, characterized in that the spout is attached to the bottom film such that the center of its pouring tube portion is located closer to the first left-right side portion than the left-right center of the bottom film.

6. 5. The standing pouch according to claim 4, wherein the bottom edge portion is formed at a position closer to the second left-right side portion than the left-right center of the bottom film.

7. The standing pouch has side seals on both left and right sides, 2. The standing pouch according to claim 1, wherein the side seal has a volume-adjusting inner edge portion that is inclined so that the left-right distance between the inner edges of the left and right side seals narrows as it goes upward.

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