Standing pouch

Abstract

To provide a standing pouch that improves its self-supporting ability. [Solution] The spout 50 is attached to the bottom film 40 such that the center of its dispensing cylinder portion 51 is positioned closer to the first left-right side than the imaginary line L connecting the left-right center of the bottom edge 46a of the non-sealed front edge portion 46 of the non-sealed area 45 and the left-right center of the bottom edge portion 47a of the non-sealed back edge portion 47 in the front-back direction. A part of the spout 50, a part of the front seal outer edge portion 42, and a part of the back seal outer edge portion 44 are configured to stand independently as legs, and the standing pouch 10 has the bottom film 40 interposed between the front film 20 and the back film 30 in the bottom region 10a where the front film 20 and the back film 30 are not fixed to each other.

Description

Technical Field

[0001] The present invention relates to a standing pouch.

Background Art

[0002] Conventionally, there has been widely used a standing pouch including a front film, a back film, and a bottom film disposed between the front film and the back film at the bottom of the pouch and heat-sealed to the front film and the back film by a bottom seal, and capable of standing on a placement surface with the bottom side of the pouch facing downward. The applicant has proposed, in Patent Document 1, a standing pouch in which, when the standing pouch is made to stand, a spout is attached to the bottom film and the contents can be poured out immediately by opening the spout, taking advantage of the property that the contents accumulate on the bottom film side due to gravity.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems 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 region and the outer edge of the front seal of the bottom film), the state of standing the standing pouch on the placement surface may become unstable, and there is room for improvement from the perspective of such self-standing property.

[0005] Therefore, the present invention solves these problems and aims to provide a standing pouch with a simple configuration and improved self-standing property.

Means for Solving the Problems

[0006] The present invention relates to a standing pouch comprising a front film, a back film, a bottom film disposed between the front film and the back film 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 seal region heat-sealed to the front film by the bottom seal, a back seal region heat-sealed to the back film by the bottom seal, and a non-seal region which is the area inside the front seal region and the back seal region, the non-seal region has a non-seal front edge which is the boundary with the front seal region and a non-seal back edge which is the boundary with the back seal region, the non-seal front edge and the non-seal back edge each have a bottom edge located on the outermost side in the front-to-back direction, a first inclined edge which extends from the bottom edge toward one of the left-to-right side portions, and is formed to move inward in the front-to-back direction as it approaches the first left-to-right side portion, and the bottom The spout has a second inclined edge that extends from the edge toward the other side of the left-right side, which is the second left-right side, and is formed to move inward in the front-back direction as it approaches the second left-right side, and the spout is attached to the bottom film such that the center of its dispensing cylinder is positioned toward the first left-right side than an imaginary line connecting the left-right center of the bottom edge of the unsealed front edge and the left-right center of the bottom edge of the unsealed back edge in the front-back direction, and the front seal area is The standing pouch has an outer edge portion of the front seal, which is the outer edge of the front seal region, and the back seal region has an outer edge portion of the back seal, which is the outer edge of the back seal region, and the standing pouch is configured to be self-supporting with a part of the spout, a part of the outer edge portion of the front seal, and a part of the outer edge portion of the back seal as legs, and in the bottom region where the bottom film is interposed between the front film and the back film, the front film and the back film are not fixed to each other, thereby solving the above problem. In the above-described standing pouch, the outer edge of the front seal and the outer edge of the back seal may each have an outer edge protrusion that is located on the outermost side in the front-to-back direction when the bottom film is unfolded and viewed from above, and an outer edge relief that is formed on the second left-to-right side of the outer edge protrusion and is located inward in the front-to-back direction from the outer edge protrusion when the bottom film is unfolded and viewed from above. In any of the above-described standing pouches, the standing pouch may be configured such that the spout does not come into contact with the flat mounting surface, while the bottom film is in full contact with the flat mounting surface in the region on the second left-right side of the outer edge protrusion. In any of the above-described standing pouches, the bottom seal may have a widened portion in which the seal width in the front-to-back direction from the unsealed front edge or the unsealed back edge to the outer edge relief portion widens towards the second left-to-right side portion. In any of the above-described standing pouches, the second inclined edge may include a straight portion. In any of the above-described standing pouches, the standing pouch has a first side seal formed by heat-sealing the front film and the back film on the first left-right side, and a second side seal formed by heat-sealing the front film and the back film on the second left-right side, wherein the first side seal has a first linear outer edge portion extending in a straight line, the second side seal has a second linear outer edge portion extending in a straight line parallel to the first linear outer edge, and the bottom seal may have a bottom linear outer edge portion that is the outer edge of the second left-right side, formed on the same line as the second linear outer edge portion, and extends in a straight line parallel to the first linear outer edge. In any of the above-described standing pouches, the outer edge protrusion may be formed at a position closer to the second left-right side portion than to the left-right center of the bottom film. In any of the above-described standing pouches, the spout may be attached to the bottom film such that the center of its dispensing cylinder is located closer to the first left-right side than the left-right center of the bottom film. In any of the above-described standing pouches, the bottom edge may be formed at a position closer to the second left-right side than to the left-right center of the bottom film. [Effects of the Invention]

[0007] According to the present invention, self-sufficiency can be improved with a simple configuration. [Brief explanation of the drawing]

[0008] [Figure 1] A plan view showing a standing pouch according to one embodiment of the present invention. [Figure 2] A perspective view showing the individual films that make up the standing pouch. [Figure 3] An explanatory diagram showing the bottom film. [Figure 4] An explanatory diagram showing how the standing pouch can stand upright using the spout. [Figure 5] An explanatory diagram showing the standing pouch in a temporary, self-supporting position. [Modes for carrying out the invention]

[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 designed to contain viscous liquid contents such as grated ginger, mayonnaise, liquid detergent, and toothpaste. As shown in Figures 1 and 2, it comprises a front film 20 and a back film 30 arranged opposite each other in the front-back direction, a bottom film 40 folded in half and positioned between the films 20 and 30 in the bottom region 10a and heat-sealed to the films 20 and 30 by a bottom seal 14, and a spout 50 that functions as a dispensing outlet for the contents.

[0011] As shown in Figure 1, the standing pouch 10 is formed by heat-sealing a top seal 11 between films 20 and 30 at the top of the pouch, a first side seal 12 between films 20 and 30 at one of the left and right sides (the first left-right side of the paper), a second side seal 13 between films 20 and 30 at the other side (the second right-right side of the paper), and a bottom seal 14 between films 20 and 30 and a bottom film 40 at the bottom region 10a. This forms a bag shape with a contents storage section 15 for storing contents.

[0012] As shown in Figure 1, the first side seal 12 has a linearly extending first linear outer edge portion 12a, the second side seal 13 has a second linear outer edge portion 13a that extends linearly parallel to the first linear outer edge portion 12a, and the bottom seal 14 has a bottom linear outer edge portion 14a that is the outer edge on the second left-right side (right side of the paper), is formed on the same line as the second linear outer edge portion 13a, and extends linearly parallel to the first linear outer edge portion 12a.

[0013] In the bottom region 10a, where the bottom film 40 is interposed between the front film 20 and the back film 30, the front film 20 and the back film 30 are not fixed to each other. Specifically, for example, at a location in the bottom region 10a where the bottom film 40 is partially removed, a method of directly thermally welding between the films 20 and 30 (a punch seal portion described later), or a method of fixing the opposing surfaces (outer surfaces facing the outside of the pouch) of the bottom film 40 arranged in a two-fold state by means such as adhesion, etc., is used. In this way, the relative positional relationship between the films 20 and 30 in the bottom region 10a is not fixed (the relative movement between the films 20 and 30 is not blocked). To further specifically describe the above punch seal portion, generally in a standing pouch, for example, at location A shown in FIG. 1, a so-called punch seal portion may be formed by partially removing the bottom film 40 and thermally welding between the films 20 and 30 to fix (adhere) them to each other. However, in this embodiment, such a punch seal portion is not formed, and in the bottom region 10a, the front film 20 and the back film 30 are not fixed (adhered) to each other.

[0014] As shown in FIG. 3, the bottom film 40 has a front seal region 41 that is thermally welded to the front film 20 at the bottom seal 14, a back seal region 43 that is thermally welded to the back film 30 at the bottom seal 14, and a non-seal region 45 that is inside the front seal region 41 and the back seal region 43 and is not welded to the films 20 and 30.

[0015] As shown in FIG. 3, the front seal region 41 has a front seal outer edge 42 that faces the front side in the front-back direction (faces downward in the state where the standing pouch 10 stands upright) when the bottom film 40 is unfolded and viewed in plan view. Also, as shown in FIG. 3, the back seal region 43 has a back seal outer edge 44 that faces the back side in the front-back direction (faces downward in the state where the standing pouch 10 stands upright) when the bottom film 40 is unfolded and viewed in plan view.

[0016] The outer edge portions 42 and 44 of the seal each have an outer edge convex portion 42a, 44a, an outer edge inclined portion 42b, 44b formed on the first left - right side portion side (left side of the paper surface) of the outer edge convex portions 42a, 44a, and an outer edge relief portion 42c, 44c formed on the second left - right side portion side (right side of the paper surface) of the outer edge convex portions 42a, 44a, as shown in Fig. 3(a).

[0017] As shown in Fig. 3(a), the outer edge convex portions 42a, 44a are the portions that are located on the outermost side in the front - back direction among the outer edge portions 42 and 44 of the seal when the bottom film 40 is unfolded and viewed in plan view (the portions that are located at the lowest position when the standing pouch 10 is made self - standing). In the present embodiment, the outer edge convex portions 42a, 44a are formed in a dot - like shape, and the vicinity of the outer edge convex portions 42a, 44a is formed in a convexly curved shape with the outer edge convex portions 42a, 44a as the vertices. The outer edge convex portions 42a, 44a are formed at positions closer to the second left - right side portion side (right side of the paper surface) than the center in the left - right direction of the bottom film 40.

[0018] As shown in Fig. 3(a), the outer edge inclined portions 42b, 44b are inclined so as to approach the inside in the front - back direction as they go toward the first left - right side portion side (left side of the paper surface) when the bottom film 40 is unfolded and viewed in plan view (approach upward as they go toward the first left - right side portion side when the standing pouch 10 is made self - standing). [[ID=I4]]As shown in Fig. 3(a), these outer edge inclined portions 42b, 44b are curved so as to bulge toward the outside in the front - back direction when the bottom film 40 is unfolded and viewed in plan view (bulge downward when viewed in the front - back direction when the standing pouch 10 is made self - standing). Further, as shown in Fig. 1, the outer edge inclined portions 42b, 44b are formed such that a part of the spout 50 is exposed when viewed in the front - back direction in a state where the content is accommodated in the content accommodation portion 15.

[0019] As shown in Figure 3(a), the outer edge relief portions 42c and 44c are located inward in the front-to-back direction from the outer edge protrusions 42a and 44a when the bottom film 40 is unfolded and viewed from above (they are located above the outer edge protrusions 42a and 44a when the standing pouch 10 is standing upright). The outer edge relief portions 42c and 44c have inclined edges 42d and 44d that, when the bottom film 40 is unfolded and viewed from above, move inward in the front-to-back direction as they move toward the second left-to-right side (right side of the paper) (and move upward as they move toward the second left-to-right side when the standing pouch 10 is standing upright). In this embodiment, the entire (or nearly entire) area of ​​the outer edge relief portions 42c and 44c is composed of inclined edges 42d and 44d. In this embodiment, the inclined edges 42d and 44d are formed to curve slightly outward in the front-to-back direction when the bottom film 40 is unfolded and viewed from above.

[0020] In this embodiment, as shown in Figure 3(a), the outer edges 42 and 44 of the seal are formed symmetrically in the vertical direction of the paper in Figure 3 (symmetrical in the front-back direction) with respect to a virtual line (valley fold 40a) extending in the left-right direction. More specifically, the entire bottom film 40 is formed symmetrically in the vertical direction of the paper in Figure 3 (symmetrical in the front-back direction) with respect to a virtual line (valley fold 40a) extending in the left-right direction.

[0021] Next, the configuration of the non-sealed area 45 of the bottom film 40 will be described below.

[0022] As shown in Figure 3(b), the non-sealed region 45 has a non-sealed front edge portion 46 which is the boundary with the front sealed region 41, and a non-sealed back edge portion 47 which is the boundary with the back sealed region 43.

[0023] As shown in Figure 3(b), the non-seal front edge 46 and non-seal back edge 47 are, when the bottom film 40 is unfolded and viewed from above, the outermost non-seal front edge 46 or non-seal back edge 47 in the front-to-back direction (located at the bottom when the standing pouch 10 is standing upright) (in this embodiment, dot-like) bottom edge 46a, 47a, and the non-seal front edge 46 and non-seal back edge 47 extend from the bottom edge 46a, 47a toward the first left-to-right side (left side of the paper), and when the bottom film 40 is unfolded and viewed from above, the front-to-back direction increases toward the first left-to-right side (left side of the paper). It has first inclined edges 46b and 47b that are formed to be closer to the inside (closer to the top as it moves toward the first left-right side when the standing pouch 10 is standing upright), and second inclined edges 46c and 47c that extend from the bottom edges 46a and 47a toward the second left-right side (right side of the paper), and are formed to be closer to the inside in the front-back direction when the bottom film 40 is unfolded and viewed in plan, as it moves toward the second left-right side (right side of the paper) (closer to the top as it moves toward the second left-right side when the standing pouch 10 is standing upright).

[0024] As shown in Figure 3(b), the non-seal front edge 46 and the non-seal back edge 47 are both formed such that the width of the second inclined edge 46c and 47c (on the right side of the paper) is narrower than the width of the first inclined edge 46b and 47b (on the left side of the paper). In this embodiment, the left-right center of the bottom edges 46a and 47a (the entire bottom edges 46a and 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. Furthermore, as shown in Figure 3(b), the first inclined edges 46b and 47b are formed in a curved linear shape that bulges outward in the front-to-back direction when the bottom film 40 is unfolded and viewed from above (bulges downward when viewed in the front-to-back direction with the standing pouch 10 standing upright). Furthermore, as shown in Figure 3(b), the second inclined edges 46c and 47c are inclined to move inward in the front-to-back direction as they move toward the second left-to-right side (right side of the paper), and include linear portions 46d and 47d that extend in a straight line (or substantially linear; in this embodiment, linear). In this embodiment, the entire area (or nearly the entire area) of the second inclined edges 46c and 47c is composed of linear portions 46d and 47d.

[0025] Furthermore, in this embodiment, as shown in Figure 3, the bottom film 40 has a valley fold portion 40a formed therein for folding the bottom film 40 in a fold-over state, and this valley fold portion 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 will not be folded at the valley fold portion 40a in the vicinity where the spout 50 is attached. Furthermore, as shown in Figure 3, the bottom film 40 has a through hole 40b for passing the dispensing cylinder portion 51 of the spout 50.

[0026] In this embodiment, as shown in Figure 3(b), the non-seal front edge 46 and the non-seal back edge 47 are formed symmetrically in the vertical direction of the paper in Figure 3 (symmetrical in the front-back direction) with respect to a virtual line (valley fold 40a) extending in the left-right direction. Furthermore, the left-right center of the bottom edge 46a of the non-seal front edge 46 and the left-right center of the bottom edge 47a of the non-seal back edge 47 are formed at the same position in the left-right direction. Therefore, the virtual line L, which will be described later, extends parallel to the front-back direction.

[0027] Furthermore, as shown in Figure 1, the bottom seal 14 has a widened portion 14b in which the seal width in the front-back direction from the non-sealed front edge portion 46 or the non-sealed back edge portion 47 to the outer edge relief portions 42c and 44c widens as it moves toward the second left-right side portion (right side of the paper).

[0028] The spout 50 is made of a synthetic resin such as PE or PP, and as shown in Figure 1, it has a cylindrical dispensing tube portion 51, a flange portion 52 that extends outward from one end of the dispensing tube portion 51, and a cap portion 53 that is detachably attached to the other end of the dispensing tube portion 51.

[0029] In this embodiment, the flange portion 52 is formed in the shape of a disc with a through hole in its center, and is placed inside the pouch and heat-sealed to the inner surface of the bottom film 40 (the surface on the side of the contents storage portion 15). Furthermore, when viewed in the axial direction of the dispensing cylinder portion 51, the spout 50 is formed such that the dispensing cylinder portion 51 is located in the center of the flange portion 52 (the center of the dispensing cylinder portion 51 and the center of the flange portion 52 coincide).

[0030] As can be seen in Figure 3(b), the spout 50 is attached to the bottom film 40 such that the center of its dispensing cylinder portion 51 (the center of the dispensing hole when viewed in the extending direction of the dispensing hole of the dispensing cylinder portion 51) is positioned closer to the first left-right side (left side of the paper) than the imaginary line L that connects the left-right center of the bottom edge portion 46a of the non-seal front edge portion 46 and the left-right center of the bottom edge portion 47a of the non-seal back edge portion 47 in the front-back direction. More specifically, in this embodiment, the spout 50 is attached to the bottom film 40 such that the entire dispensing cylinder portion 51 is positioned closer to the first left-right side (left side of the paper) than the imaginary line L. More specifically, in this embodiment, the spout 50 is attached to the bottom film 40 such that the entire flange portion 52 is positioned closer to the first left-right side (left side of the page) than the imaginary line L. Attaching the entire flange portion 52 to the bottom film 40 in this manner, closer to the first left-right side than the imaginary line L (a position further away from the imaginary line L), is preferable because it suppresses the occurrence of unintended wrinkles in the bottom film 40. That is, when the contents are placed in the contents storage section 15 and the standing pouch 10 is self-supporting, the portion of the bottom film 40 near the imaginary line L is the most convex (mountain-shaped) curved portion when viewed in the front-back direction. By attaching the flange portion 52 to a relatively flat portion of the bottom film 40, avoiding the area near the imaginary line L, it is possible to suppress the occurrence of unintended 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 such that the center of its dispensing cylinder portion 51 (in this embodiment, the entire dispensing cylinder portion 51, and more specifically, the entire flange portion 52) is located closer to the first left-right side (left side of the paper) than to the left-right center of the bottom film 40.

[0031] Furthermore, 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 of the paper) than the imaginary line L. In other words, when the standing pouch 10 is placed upright on the mounting surface P with the bottom region 10a facing downwards (with contents placed in the contents storage section 15), the spout 50 (the whole thing) is attached to the portion of the bottom film 40 that, when viewed in the front-back direction, slopes upwards as it approaches the first left-right side (left side of the paper). Therefore, when the standing pouch 10 is placed upright on the mounting surface P using a part of the spout 50 as a leg, as can be seen from Figure 4, when viewed in the front-back direction, the axis of the spout 50 (dispensing cylinder portion 51) is inclined with respect to the vertical direction, that is, it extends diagonally with respect to the vertical direction (and horizontal direction), moving outwards in the left-right direction as it goes downwards.

[0032] In this embodiment, when the standing pouch 10 has contents placed in the contents storage section 15, it is configured to stand on its own by using a part of the spout 50 (in this embodiment, the contact point 53a of the cap section 53 shown in Figure 4), a part of the outer edge 42 of the front seal (in this embodiment, the outer edge protrusion 42a and the vicinity of the outer edge protrusion 42a), and a part of the outer edge 44 of the back seal (in this embodiment, the outer edge protrusion 44a and the vicinity of the outer edge protrusion 44a) as legs that contact the mounting surface P, as shown in Figure 4. (That is, 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.)

[0033] Furthermore, as can be seen in Figures 4 and 5, the standing pouch 10 is configured such that the spout 50 does not come into contact with the mounting surface P, with the bottom film 40 in full contact with the flat mounting surface P in the region on the second left-right side of the outer edge protrusions 42a and 44a, as shown in Figure 5 (that is, various designs such as the dimensional relationships and angular relationships of each part are set so as to achieve the above-described state).

[0034] Figures 4 and 5 show the state in which the standing pouch 10 is self-supporting with contents contained within the contents storage section 15 (i.e., the standing pouch 10 is inflated by the contents). Furthermore, Figures 4(b) and 5(b) are schematic representations of the standing pouch 10 as viewed from the second left-right side.

[0035] The standing pouch 10 of this embodiment, obtained in this way, is configured to stand on its own when the standing pouch 10, with contents placed inside the contents storage section 15, is made to stand on its own by using a part of the spout 50, a part of the outer edge portion 42 of the front seal (in this embodiment, the outer edge protrusion 42a and the vicinity of the outer edge protrusion 42a), and a part of the outer edge portion 44 of the back seal (in this embodiment, the outer edge protrusion 44a and the vicinity of the outer edge protrusion 44a) as legs that make contact with the mounting surface P, as shown in Figure 4. This allows for improved self-supporting capability of the standing pouch 10 with a simple configuration, and also increases design flexibility for the outer edges 42 and 44 of the seal by utilizing a portion of the spout 50 as a leg.

[0036] Furthermore, in the bottom region 10a where the bottom film 40 is interposed between the front film 20 and the back film 30, the front film 20 and the back film 30 are not fixed to each other. This allows for a good temporary placement state, as shown in Figure 5, in which the standing pouch 10 is placed with the bottom film 40 in planar contact with the mounting surface P in the region on the second left-right side of the outer edge protrusions 42a and 44a. In other words, if the front film 20 and the back film 30 are fixed together in the bottom region 10a by a so-called punch seal portion, the opening of the bottom film 40 (bottom seal 14) is restricted, making it difficult to bring the bottom film 40 into planar contact with the mounting surface P in the temporary placement state shown in Figure 5. However, in the standing pouch 10 of this embodiment, since the front film 20 and the back film 30 are not fixed together, the bottom film 40 can be opened sufficiently and brought into planar contact with the mounting surface P, thus enabling the above temporary placement state to be achieved successfully. In Figure 5, the bottom film 40 is shown in full contact with the mounting surface P in the area on the second left-right side of the outer edge protrusions 42a and 44a. However, when temporarily placing the standing pouch 10, the second left-right side portion 14c of the bottom seal 14 (bottom film 40) may be opened outward in the front-back direction, so that only a portion of the bottom film 40 in the area on the second left-right side of the outer edge protrusions 42a and 44a is in contact with the mounting surface P. Furthermore, in the bottom region 10a, the front film 20 and the back film 30 are not fixed to each other, making it easier to squeeze out the contents to the very end.

[0037] Furthermore, the outer edges 42 and 44 of the seal each have outer edge protrusions 42a and 44a located on the outermost side in the front-to-back direction, and outer edge relief portions 42c and 44c formed on the second left-to-right side (right side of the paper) of the outer edge protrusions 42a and 44a, and located inward in the front-to-back direction from the outer edge protrusions 42a and 44a. In this way, by forming outer edge relief portions 42c and 44c on the second left-right side (right side of the paper) of the outer edge protrusions 42a and 44a, when contents are contained in the contents storage portion 15, the outer edge protrusions 42a and 44a, where the distance between the front seal outer edge 42 and the back seal outer edge 44 in the front-back direction is greater than near the second left-right side (right edge of the paper) of the seal outer edges 42 and 44, can make contact with the mounting surface P, thereby stabilizing the self-supporting state. In other words, by forming outer edge relief portions 42c and 44c on the second left-right side (right side of the paper) of the outer edge protrusions 42a and 44a, it is possible to avoid only the area near the second left-right side (right edge of the paper) of the outer seal edges 42 and 44, where the separation distance between them in the front-back direction is small, contact with the mounting surface P, thereby stabilizing the self-supporting state.

[0038] Furthermore, the standing pouch 10 is configured such that the spout 50 does not come into contact with the mounting surface P, even when the bottom film 40 is in full contact with the mounting surface P in the area on the second left-right side of the outer edge protrusions 42a and 44a. This makes it possible to avoid the tip of the dispensing cylinder 51 coming into contact with the mounting surface P when the cap 53 is removed and the pouch is temporarily placed as shown in Figure 5. As a result, the contents do not contaminate the mounting surface P, and the standing pouch 10 can be temporarily placed in a hygienic state.

[0039] Furthermore, the bottom seal 14 has a widened portion 14b in the front-to-back direction, from the non-sealed front edge 46 or the non-sealed back edge 47 to the outer edge relief portions 42c and 44c, which widens as it approaches the second left-to-right side portion. This allows the mounting state to be stabilized in a temporary placement state as shown in Figure 5.

[0040] Furthermore, because the second inclined edges 46c and 47c include linear portions 46d and 47d that extend in a straight line (or nearly straight line), the films 20 and 30 become easier to bend at the second inclined edges 46c and 47c. This makes it easier to open the second left-right side portion 14c of the bottom seal 14 (bottom film 40) outward in the front-back direction, thus making it easier to achieve the temporary placement state shown in Figure 5.

[0041] Furthermore, since the first side seal 12 has a first linear outer edge portion 12a that extends in a straight line, the second side seal 13 has a second linear outer edge portion 13a that extends in a straight line parallel to the first linear outer edge portion 12a, and the bottom seal 14 has a bottom linear outer edge portion 14a that is the outer edge on the second left-right side portion, is formed on the same line as the second linear outer edge portion 13a, and extends in a straight line parallel to the first linear outer edge portion 12a, the standing pouch 10 can be transported smoothly during the manufacturing of the standing pouch 10. In other words, when the standing pouch 10 is transported, the first straight outer edge 12a of the first side seal 12 and the second straight outer edge 13a of the second side seal 13 are guided by a transport guide (not shown) that extends along the transport direction. By also forming a bottom straight outer edge 14a on the bottom seal 14, the area guided by the transport guide becomes longer, allowing the transport guide to perform guiding more stably.

[0042] Furthermore, the outer edge protrusions 42a and 44a are formed at a position closer to the second left-right side (right side of the paper) than to the left-right center of the bottom film 40. As a result, as shown in Figure 4, it is possible to separate the contact point 53a of the spout 50 with the mounting surface P from the outer edge protrusions 42a and 44a in the left-right direction, thereby stabilizing the self-supporting state.

[0043] Furthermore, the spout 50 is attached to the bottom film 40 such that the center of its dispensing cylinder portion 51 is positioned closer to the first left-right side (left side of the paper) than to the left-right center of the bottom film 40. As a result, as shown in Figures 4 and 5, the contact point 53a of the spout 50 with respect to the mounting surface P and the outer edge protrusions 42a and 44a can be separated in the left-right direction, thereby stabilizing the self-supporting state.

[0044] Furthermore, the bottom edges 46a and 47a of the non-sealed area 45 are formed at a position closer to the second left-right side (right side of the paper) than to the left-right center of the bottom film 40. As a result, the portion of the non-sealed area 45 that is on the left side in the first left-right direction (left side of the paper) is wider than the imaginary line L, which improves the design freedom regarding the position of the spout attached to the non-sealed area 45 of the bottom film 40. This makes it easier to open the cap portion 53 of the spout 50, thus improving the operability of the spout 50.

[0045] Although embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and it is possible to make various design changes without departing from the present invention as described in the claims, such as constructing a standing pouch 10 by arbitrarily combining the configurations of the above or below embodiments or modified examples.

[0046] For example, regarding the specific embodiments of each film 20, 30, and 40, as long as they have a heat-weldable layer on at least one side, such as an olefin-based layer of low-density polyethylene or polypropylene, or a polyester-based layer such as PET (polyethylene terephthalate), a single heat-weldable layer or any layer laminated on the heat-weldable layer may be used. The materials constituting the laminate can be anything, and can be arbitrarily formed by laminating known polyesters such as PET and PBT (polybutylene terephthalate), polypropylene, polyamide, polyethylene, aluminum foil, gas barrier layers, vapor-deposited layers, etc. Furthermore, although the above-described embodiment was explained in which the bottom film 40, which serves as a gusset film (film for the gusset), is arranged only in the bottom region 10a, the specific form of the standing pouch 10 is not limited to this. For example, a gusset film may also be arranged between the films 20 and 30 on the top side of the pouch, or in other words, a gusset may also be formed on the top side of the pouch. Furthermore, although the above-described embodiment was explained assuming that the front film 20 and the back film 30 are formed separately, the front film 20 and the back film 30 may be formed integrally (formed as a single film), in which case the top seal 11 does not need to be formed.

[0047] Furthermore, in the embodiments described above, as shown in Figure 3(a), the outer edge portion 42 of the front seal and the outer edge portion 44 of the back seal were described as being formed symmetrically in the vertical direction of the paper in Figure 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). Furthermore, in the embodiments described above, as shown in Figure 3(a), the outer edge protrusions 42a and 44a were formed at a position closer to the second left-right side (right side of the paper) than to the left-right center of the bottom film 40. However, the formation position of the outer edge protrusions 42a and 44a is not limited to the above. For example, at least one of the outer edge protrusions 42a and 44a may be formed at the left-right center of the bottom film 40, or at a position closer to the first left-right side (left side of the paper) than to the left-right center of the bottom film 40. Furthermore, in the embodiments described above, the outer edge protrusions 42a and 44a were described as being formed as points, as shown in Figure 3(a). However, at least one of the outer edge protrusions 42a and 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 and 44a at a position closer to the second left-right side (right side of the paper) than to the left-right center of the bottom film 40. Furthermore, although the above-described embodiment was explained as having outer edge inclined portions 42b and 44b formed in a curved shape, the specific form of the outer edge inclined portions 42b and 44b is not limited to this, and can be arbitrarily configured with any curve, straight line, or combination thereof.

[0048] Furthermore, in the above-described embodiment, as shown in Figure 3(a), the entire area (or almost the entire area) of the outer edge relief portions 42c and 44c was described as being composed of inclined edge portions 42d and 44d that are inclined inward in the front-to-back direction as they move toward the second left-to-right side portion (right side of the paper). However, the specific form of the outer edge relief portions 42c and 44c can be any portion as long as its entire area is located inward in the front-to-back direction than the outer edge protrusions 42a and 44a.

[0049] Furthermore, in the embodiments described above, when the standing pouch 10 is made to stand on its own, it is explained that a portion of the outer edges 42 and 44 of the seal are made to directly contact the mounting surface P to make contact with it. However, it is not necessary for a portion of these outer edges 42 and 44 of the seal to directly contact the mounting surface P. In other words, either the film 20, 30 or the bottom film 40 may be allowed to protrude outside the outer edges 42, 44 of the seal, forming an unsealed portion of the film 20, 30 or the bottom film 40 outside the outer edges 42, 44 of the seal, and when the standing pouch 10 is made to stand on its own, the unsealed portion may be brought into contact with the mounting surface P, so that a part of the outer edges 42, 44 of the seal are in contact with the mounting surface P (through the unsealed portion).

[0050] Furthermore, in the embodiments described above, the bottom edges 46a and 47a of the non-sealed area 45 were described as being formed as points located at the outermost (lowest) end of the edges 46 and 47 in the front-to-back direction, as shown in Figure 3(b). However, at least one of the bottom edges 46a and 47a may be formed as a portion extending linearly in the left-to-right direction. When the bottom edges 46a and 47a are formed as portions extending linearly, it is preferable to attach the spout 50 to the bottom film 40 such that the entire flange portion 52 is positioned closer to the first left-to-right 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-to-back direction. Furthermore, in the embodiments described above, as shown in Figure 3(b), the non-seal front edge portion 46 and the non-seal back edge portion 47 were described as being formed symmetrically in the vertical direction of the paper in Figure 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 non-seal front edge portion 46 and the non-seal back edge portion 47 may be formed asymmetrically in the vertical direction of the paper in Figure 3 (symmetrical in the front-back direction). For example, the left-right center of the bottom edge portion 46a of the non-seal front edge portion 46 and the left-right center of the bottom edge portion 47a of the non-seal back edge portion 47 may be formed with a left-right offset. In this case, the virtual line L will extend diagonally with respect to the front-back direction. Furthermore, in the embodiments described above, as shown in Figure 3(b), the first inclined edges 46b and 47b of the non-sealed area 45 were described as being formed in a curved linear shape that bulges outward in the front-to-back direction when the bottom film 40 is unfolded and viewed from above (bulges downward in the front-to-back direction when the standing pouch 10 is viewed in a self-supporting state). However, the specific form of the first inclined edges 46b and 47b is not limited to this, and at least one of the first inclined edges 46b and 47b may be arbitrarily configured with any curve, straight line, or combination thereof. Furthermore, in the above-described embodiment, the edges 46 and 47 were described as being formed such that the width of the second inclined edges 46c and 47c (on the right side of the paper) in the left-right direction is narrower than the width of the first inclined edges 46b and 47b (on the left side of the paper), as shown in Figure 3(a), with the left-right center of the bottom edges 46a and 47a positioned towards the second left-right side (right side of the paper). However, the width of the first inclined edges 46b and 47b and the width of the second inclined edges 46c and 47c are the same. As shown above, the left-right center of the bottom edges 46a and 47a may be formed at a position not adjacent to either the first left-right side (left side of the paper) or the second left-right side (right side of the paper) (the left-right center of the pouch), or the left-right center of the bottom edges 46a and 47a may be formed at a position adjacent to the first left-right side (left side of the paper) such that the left-right width of the second inclined edges 46c and 47c (on the right side of the paper) is wider than the left-right width of the first inclined edges 46b and 47b (on the left side of the paper).

[0051] Furthermore, in the embodiments described above, the flange portion 52 of the spout 50 was described as being located inside the pouch and heat-welded to the inner surface of the bottom film 40. However, the manner in which the flange portion 52 is attached to the bottom film 40 is not limited to this. 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 methods other than heat welding, such as adhesive bonding. Furthermore, in the above-described embodiment, the flange portion 52 of the spout 50 was described as being formed in a disc shape with a through hole in its center. However, the specific form of the flange portion 52 is not limited to this and can be any form. For example, the flange portion 52 may be formed with an elliptical or rectangular outer edge. Furthermore, although the above-described embodiment was explained assuming that the flange portion 52 of the spout 50 is positioned in the center of the bottom film 40 in the front-to-back direction, the flange portion 52 may be attached to a position offset from the center of the bottom film 40 in either the front-to-back direction. [Explanation of Symbols]

[0052] 10 ··· Standing Pouch 10a ··· Bottom region 11 ··· Top seal 12 ··· First side seal 12a ··· Outer edge of the first straight line 13 ··· Second side seal 13a ··· Second straight line outer edge 14 ··· Bottom seal 14a ··· Bottom straight outer edge 14b... Widening section 14d... 2nd left and right side part 15 ··· Contents storage compartment 20 ··· Front film 30 ··· Backside film 40 ··· Bottom film 40a... Tanioribe 40b... Through hole 41 ··· Front side sealing area 42... Outer edge of the front seal 42a ··· Outer edge protrusion 42b ··· Outer edge inclined section 42c ··· Outer edge escape section 42d ··· Outer edge inclined section 43 ··· Backside sealing area 44... Outer edge of the back side seal 44a ··· Outer edge protrusion 44b ··· Outer edge inclined section 44c ··· Outer edge escape section 44d ··· Outer edge inclined section 45 ··· Non-sealed area 46 ··· Non-sealed front edge 46a...bottom edge 46b ··· First inclined edge 46c ··· Second inclined edge 46d ··· Straight section 47 ··· Non-sealed back edge 47a...bottom edge 47b ··· First inclined edge 47c ··· Second inclined edge 47d ··· Straight section 50 ··· Spout 51 ··· Pour cylinder part 52 ··· Flange section 53 ··· Cap part 53a ... Grounding point L ··· virtual line P ··· Mounting 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 and heat-sealed to the front film and the back film by a bottom seal, and a spout, The bottom film has a front sealing region that is heat-sealed to the front film in the bottom seal, a back sealing region that is heat-sealed to the back film in the bottom seal, and a non-sealed region which is the area inside the front sealing region and the back sealing region. The non-sealed region has a non-sealed front edge which is the boundary with the front-side sealed region and a non-sealed back edge which is the boundary with the back-side sealed region. The non-seal front edge and the non-seal back edge each have a bottom edge located on the outermost side in the front-to-back direction, a first inclined edge extending from the bottom edge toward a first left-to-right side which is one of the left-to-right sides, and formed to move inward in the front-to-back direction as it approaches the first left-to-right side, and a second inclined edge extending from the bottom edge toward a second left-to-right side which is the other of the left-to-right sides, and formed to move inward in the front-to-back direction as it approaches the second left-to-right side, The spout is attached to the bottom film such that the center of its dispensing cylinder is positioned closer to the first left-right side than the imaginary line connecting the left-right center of the bottom edge of the non-sealed front edge and the left-right center of the bottom edge of the non-sealed back edge in the front-back direction. The aforementioned front-side sealing region has an outer edge portion which is the outer edge of the front-side sealing region. The aforementioned back side seal region has an outer edge portion which is the outer edge portion of the back side seal, The standing pouch is configured to be self-supporting, with 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 serving as legs. A standing pouch characterized in that, in the bottom region where the bottom film is interposed between the front film and the back film, the front film and the back film are not fixed to each other.

2. The standing pouch according to claim 1, characterized in that the outer edge of the front seal and the outer edge of the back seal each have an outer edge protrusion that is located on the outermost side in the front-to-back direction when the bottom film is unfolded and viewed in plan, and an outer edge relief that is formed on the second left-to-right side of the outer edge protrusion and is located inward in the front-to-back direction from the outer edge protrusion when the bottom film is unfolded and viewed in plan.

3. The standing pouch according to claim 2, characterized in that the spout does not come into contact with the flat mounting surface when the bottom film is in full contact with the flat mounting surface in the region on the second left-right side of the outer edge protrusion.

4. The standing pouch according to claim 2, characterized in that the bottom seal has a widening portion in the front-to-back direction from the non-sealed front edge or the non-sealed back edge to the outer edge relief portion, which widens as it approaches the second left-to-right side portion.

5. The standing pouch according to claim 1, characterized in that the second inclined edge portion includes a straight portion.

6. The standing pouch has a first side seal formed by heat-sealing the front film and the back film on the first left-right side portion, and a second side seal formed by heat-sealing the front film and the back film on the second left-right side portion, The first side seal has a first straight outer edge portion that extends in a straight line, The second side seal has a second straight outer edge portion that extends linearly parallel to the first straight outer edge portion, The standing pouch according to claim 1, characterized in that the bottom seal has a bottom straight outer edge which is the outer edge on the second left-right side portion, is formed on the same line as the second straight outer edge portion, and extends linearly parallel to the first straight outer edge portion.

7. The standing pouch according to claim 2, characterized in that the outer edge protrusion is formed at a position closer to the second left-right side portion than to the left-right center of the bottom film.

8. The standing pouch according to claim 1, characterized in that the spout is attached to the bottom film such that the center of its dispensing cylinder portion is located closer to the first left-right side portion than the left-right center of the bottom film.

9. The standing pouch according to claim 1, characterized in that the bottom edge is formed at a position closer to the second left-right side than to the left-right center of the bottom film.

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