Jig

Abstract

To provide a jig capable of applying appropriate force when opening the bottom of a packaging bag.SOLUTION: A jig 1 for pressing and expanding a bottom 84 of an envelope-shaped packaging bag 80 having the bottom 84 opposite an opening section for filling food, includes: a first surface 30 that is located on the opening portion side in a first direction, which is the insertion direction of the jig 1, when the jig 1 is inserted through the opening-portion and is in contact with the bottom portion 84 and viewed from a side surface 88 of the packaging bag 80; and a second surface 20 that is located on the bottom portion 84 side in the first direction and, when viewed from the side surface 88 of the packaging bag 80, has a central portion 23 recessed relative to one end portion 22 and the other end portion 22 in a second direction orthogonal to the first direction.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a jig. [Background technology]

[0002] BACKGROUND ART Conventionally, packaging bags for food or the like that are self-standing by spreading out the bottom of the packaging bag have been known.

[0003] For example, Patent Document 1 describes a packaging bag in which a paper base layer is provided on a laminate that forms the bottom of the packaging bag. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 7334612 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the packaging bag described in Patent Document 1, the weight of the contents alone does not allow the bottom to expand sufficiently, causing the contents to spill out, particularly when the contents to be filled are bulky and lightweight, so it is necessary to expand the bottom of the packaging bag before filling it with the contents. Applying excessive force to expand the bottom can cause the packaging bag to tear, so it is necessary to apply an appropriate amount of force when expanding the bottom of the packaging bag.

[0006] In view of the above problems, an object of the present invention is to provide a jig that can apply an appropriate force when expanding the bottom of a packaging bag. [Means for solving the problem]

[0007] To solve the above problem, according to a first aspect of the present invention, the following tool is provided: This tool is a tool for pushing in and expanding the bottom of an envelope-shaped packaging bag having a bottom facing an opening portion into which food is filled, and includes: a first surface that is located on the opening portion side in a first direction that is the insertion direction of the tool when viewed from the side of the packaging bag with the tool inserted through the opening portion and in contact with the bottom; and a second surface that is located on the bottom side in the first direction and has a central portion that is recessed more than one end and the other end in a second direction perpendicular to the first direction when viewed from the side of the packaging bag.

[0008] In addition, the jig according to the second aspect of the present invention further comprises a contact portion having the first surface and the second surface, and the second surface has a flat pressing portion in the central portion that presses the bottom portion into place.

[0009] In addition, in the jig according to the third aspect of the present invention, the pushing portions are arranged symmetrically about the center of the second surface in a third direction perpendicular to the first direction along the surface of the packaging bag when viewed from the surface of the packaging bag.

[0010] In addition, in the jig according to the fourth aspect of the present invention, the length of the second surface in a third direction perpendicular to the first direction along the surface of the packaging bag when viewed from the surface of the packaging bag is at least one-third of the length of the bottom of the packaging bag.

[0011] In addition, in the jig according to the fifth aspect of the present invention, when viewed from the surface of the packaging bag, the end of the second surface in a third direction perpendicular to the first direction along the surface is tapered such that the width between the first surface and the second surface decreases toward the side of the contact portion in the third direction.

[0012] In the jig according to the sixth aspect of the present invention, the center of the first surface is located closer to the opening portion than one end and the other end in the second direction.

[0013] In addition, in the jig according to the seventh aspect of the present invention, the angle formed by the one end or the other end in the second direction and the push-in portion that is recessed from the one end or the other end is an obtuse angle.

[0014] Moreover, the jig according to an eighth aspect of the present invention further comprises a base portion for fixing the jig, and a support portion for connecting the base portion and the contact portion.

[0015] In addition, in the jig according to the ninth aspect of the present invention, the length from at least a part of the base portion to the second surface of the contact portion is approximately the same as the length from the opening end of the packaging bag to the bottom end of the packaging bag. [Effects of the Invention]

[0016] The jig according to the present invention can apply an appropriate force when expanding the bottom of the packaging bag. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a schematic perspective view showing a jig according to an embodiment of the present invention and a packaging bag to which the jig is applied. [Figure 2] FIG. 2 is a schematic perspective view showing the contact portion of FIG. 1. [Figure 3] FIG. 2 is a side cross-sectional view of the packaging bag of FIG. [Figure 4] FIG. 10 is a schematic diagram illustrating a case where the jig is applied to a packaging bag. [Figure 5] FIG. 10 is a schematic perspective view showing a contact portion according to a modified example. [Figure 6] FIG. 10 is a schematic perspective view showing a contact portion according to a modified example. [Figure 7] FIG. 10 is a schematic perspective view showing a contact portion according to a modified example. [Figure 8] FIG. 10 is a schematic view showing a jig according to a modified example. [Figure 9] FIG. 10 is a schematic perspective view showing a jig according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. To facilitate understanding of the description, the same components in the drawings will be denoted by the same reference numerals as much as possible, and duplicated descriptions will be omitted.

[0019] ---Embodiment --- First, a jig 1 according to the embodiment will be described.

[0020] <Overall structure> FIG. 1 is a schematic perspective view showing a jig 1 according to an embodiment of the present invention and a packaging bag 80 to which the jig 1 is applied.

[0021] As shown in Fig. 1, jig 1 includes contact portion 10, support portion 40, and base portion 70. Furthermore, packaging bag 80 includes opening portion 82, bottom portion 84, side surface 88, and surface 89. Jig 1 is inserted into opening portion 82 of packaging bag 80 and is used to push in and open bottom portion 84 of packaging bag 80. Contact portion 10, support portion 40, and base portion 70 are formed as separate bodies that are detachable from one another. Jig 1 is placed on a workbench, for example.

[0022] The base 70 includes a wide portion 72, a handle portion 74, a positioning portion 76, and a connecting portion 78. The base 70 is a member for fixing the jig 1 at a predetermined fixed position. The wide portion 72 is wider than the handle portion 74. For example, the jig 1 can be fixed at a predetermined fixed position by clamping the handle portion 74 with a vice installed on a workbench or by pressing the wide portion 72 from above. Alternatively, the wide portion 72 may be installed above the workbench, with the handle portion 74 extending beyond the workbench. In this case, spaces are formed on both sides of the handle portion 74, ensuring a working space when the packaging bag 80 is pushed into the jig 1. The connecting portion 78 is a portion for connecting the support portion 40 and the base 70. The positioning portion 76 is a portion for visually checking the position of the side surface 88 of the packaging bag 80 when pushing the packaging bag 80 into the jig 1. The two positioning portions 76 are located symmetrically with respect to the connecting portion 78. This makes it possible to prevent one of the bottom side surfaces 86 of the packaging bag 80 from being pushed in unevenly when the jig 1 is inserted into the packaging bag 80.

[0023] The support portion 40 includes a connecting portion 46 and a connecting portion 48. The support portion 40 is provided between the base portion 70 and the contact portion 10, and is a member that connects the base portion 70 and the contact portion 10. The support portion 40 is a flat plate-shaped member. The connecting portion 48 fits into the connecting portion 78 of the base portion 70. This connects the support portion 40 and the base portion 70. The connecting portion 46 is a portion that connects the support portion 40 and the contact portion 10.

[0024] The contact portion 10 includes a connecting portion 38. The contact portion 10 is a member that comes into contact with the bottom portion 84 of the packaging bag 80. The connecting portion 38 fits into the connecting portion 46 of the support portion 40. This connects the contact portion 10 and the support portion 40.

[0025] The packaging bag 80 is a bag for packaging food. The food may be in the form of, for example, a solid, liquid, powder, paste, etc., but is not limited to these. The packaging bag 80 has an envelope-like shape with sides 88 longer than a bottom 84. The packaging bag 80 is made of a laminated material including, for example, a paper base layer, but the material is not limited to this.

[0026] Food is filled into packaging bag 80 from the side of opening portion 82. Opening portion 82 has opening end 83, which is an end portion of opening portion 82. Opening portion 82 is closed after the food is filled, and packaging bag 80 is hermetically sealed. Opening portion 82 may be closed by welding with heat, or may be closed and sealed by checking, for example.

[0027] The bottom portion 84 is provided at a position opposite to the opening portion 82. The bottom portion 84 has a bottom end 85 which is an end portion of the bottom portion 84 and a bottom side surface 86 which is a side surface of the bottom portion 84. The bottom end 85 and the bottom side surface 86 are welded together by, for example, heat.

[0028] The side surfaces 88 are both side surfaces of the surface 89 of the packaging bag 80. The side surfaces 88 are welded together by, for example, heat.

[0029] <Structure of contact portion 10> FIG. 2 is a schematic perspective view showing the contact portion 10 of FIG.

[0030] 2, the contact portion 10 has a side surface 12, a side surface 14, a tapered surface 16, a second surface 20, and a first surface 30. Here, the direction in which the jig 1 is inserted into the packaging bag 80 is referred to as a first direction (hereinafter, Z direction), the direction in which the aforementioned support portions 40 are provided is referred to as a "downward direction," and the direction in which they are not provided is referred to as an "upward direction." Furthermore, a direction perpendicular to the Z direction and which is the width direction of the contact portion 10 is referred to as a second direction (hereinafter, X direction). Furthermore, a direction perpendicular to the Z direction and the X direction and which is the length direction of the contact portion 10 is referred to as a third direction (hereinafter, Y direction).

[0031] The side surface 12 in the X direction (hereinafter referred to as the X side surface 12) is formed parallel to the Z direction. The tapered surface 16 has a shape in which the width in the Z direction narrows upward from the X side surface 12 toward the side surface 14 in the Y direction (hereinafter referred to as the Y side surface 14).

[0032] The second surface 20 is a surface located above the contact portion 10. The second surface 20 includes an end portion 22 in the X direction (hereinafter referred to as the X end portion 22), a central portion 23, a pressing portion 24, an end portion 26 in the Y direction (hereinafter referred to as the Y end portion 26), and a groove portion 28.

[0033] The length of the second surface 20 in the Y direction is at least one-third of the length in the Y direction of the bottom 84 of the packaging bag 80 described above. By making the length of the second surface 20 in the Y direction at least a certain amount, it is possible to prevent a wide area of ​​the bottom 84 from being pressed in, resulting in a portion of the bottom 84 not being able to be pressed in completely and not expanding. In other words, it is possible to improve the stability of the bottom opening of the bottom 84 by the jig 1.

[0034] The X-end portions 22 are the end portions of the second surface 20 in the X-direction. The central portion 23 is the central portion of the second surface 20 in the X-direction. A pressed portion 24 or a groove portion 28 is formed in the central portion 23. The central portion 23 is recessed in the Z-direction more than one X-end portion 22 and the other X-end portion 22.

[0035] The pressing portion 24 is provided in the central portion 23. The pressing portion 24 is provided in the Y direction approximately symmetrically about the center of the second surface 20. The pressing portion 24 is a portion that presses the bottom portion 84 of the packaging bag 80. In this specification, the width of the pressing portion 24 in the X direction refers to the width between one end and the other end of the pressing portion 24 in the X direction. Also in this specification, the length of the pressing portion 24 in the Y direction refers to the length between one end and the other end of the pressing portion 24 in the Y direction. The pressing portion 24 has a rectangular shape when viewed in a plane, and has a flat shape that is formed approximately perpendicular to the Z direction.

[0036] The Y ends 26 are each end portion of the second surface 20 in the Y direction. The width of the Y ends 26 in the X direction is tapered so that it narrows toward the Y side surface 14. The Y ends 26 are also tapered so that the width between the second surface 20 and the first surface 30 becomes smaller toward the Y side surface 14.

[0037] The groove 28 is provided in the central portion 23. The groove 28 has a flat shape and is located below the push-in portion 24.

[0038] The first surface 30 is a surface located below the contact portion 10 .

[0039] FIG. 3 is a side cross-sectional view of the packaging bag 80 of FIG.

[0040] 3, the bottom 84 is formed in a V-shape, and when the tip of the V is pressed in, the bottom 84 expands, and the bottom side surfaces 86 open toward one surface 89 and the other surface 89 of the packaging bag 80, so that the bottom 84 touches the floor or the like, thereby allowing the packaging bag 80 to stand on its own. The bottom 84 of the packaging bag 80 to which the jig 1 is applied is not limited to the above-mentioned shape. For example, the bottom 84 may have a so-called standing pouch shape in which the inner surface of the film on one surface 89 of the packaging bag 80 and the inner surface of the film on the other surface 89 are welded together at a portion of the bottom side surfaces 86, and the bottom edge 85 touches the floor or the like (stands on its feet) after the bottom 84 is pressed in.

[0041] <Application example of jig 1> Fig. 4 is a schematic diagram of the application of jig 1 to packaging bag 80. Specifically, Fig. 4 is a schematic diagram of the packaging bag 80 viewed from a side surface 88 with jig 1 inserted through the aforementioned opening portion 82 of the packaging bag 80 and in contact with the bottom portion 84. Like Fig. 3, the packaging bag 80 is illustrated as a side cross-sectional view.

[0042] 4, the jig 1 can expand the V-shaped bottom 84 of the packaging bag 80 by the pressing portion 24 pressing the V-shaped bottom 84 of the packaging bag 80. In the Z direction, the pressing portion 24, which is recessed from the X end portion 22, presses the bottom 84, thereby preventing the V-shaped tip of the bottom 84 from shifting from the second surface 20 when pressed.

[0043] The angle formed by one X end 22 or the other X end 22 of second surface 20 and push-in portion 24 recessed from one X end 22 or the other X end 22 is an obtuse angle. As a result, when bottom portion 84 is pushed in, the V-shaped tip portion of bottom portion 84 gets caught on the corner, preventing the V-shaped tip portion from being biased to either side in the X direction of second surface 20 and coming off jig 1.

[0044] The first surface 30 has an end portion 32 in the X direction (hereinafter, referred to as an X end portion 32 ) and a central portion 33 .

[0045] The X-ends 32 are the end portions of the first surface 30 in the X direction. The central portion 33 is the central portion in the X direction of the first surface 30. The central portion 33 is located lower than one X-end 32 and the other X-end 32 (on the side of the aforementioned opening portion 82).

[0046] In terms of its positional relationship with the packaging bag 80, the first surface 30 of the jig 1 is located on the side of the opening portion 82 described above in the Z direction. The Z direction is the direction in which the jig 1 is inserted into the packaging bag 80. The Y direction is the direction perpendicular to the Z direction along the surface 89 of the packaging bag 80 when viewed from the surface 89. The X direction is the direction perpendicular to the Z direction along the side surface 88 when viewed from the side surface 88 of the packaging bag 80.

[0047] The length in the Z direction from at least a portion of base portion 70 to X end portion 22 of second surface 20 of contact portion 10 is approximately the same as the length from opening end 83 of packaging bag 80 to bottom end 85 of packaging bag 80. This allows bottom portion 84 to be pushed in and expanded by pushing packaging bag 80 up to base portion 70, and prevents excessive pushing. Here, the length in the Z direction from at least a portion of base portion 70 to X end portion 22 of second surface 20 of contact portion 10 may be adjusted by the length of support portion 40, or may be adjusted by the height of positioning portion 76.

[0048] <Action and effect> As described above, the jig 1 according to this embodiment is a jig 1 that presses in and expands the bottom 84 of an envelope-shaped packaging bag 80, which has a bottom 84 facing an opening portion 82 into which food is filled. The jig 1 is equipped with: a first surface 30 that is located on the opening portion 82 side in the Z direction, which is the insertion direction of the jig 1, when viewed from a side surface 88 of the packaging bag 80 with the jig 1 inserted from the opening portion 82 and in contact with the bottom 84; and a second surface 20 that is located on the bottom 84 side in the Z direction and has a central portion 23 that is recessed more than one X end 22 and the other X end 22 in the X direction orthogonal to the Z direction when viewed from the side surface 88 of the packaging bag 80.

[0049] According to this configuration, when viewed from the side 88, an appropriate force can be applied when opening the bottom 84 of the packaging bag 80, compared to a jig whose central portion 23 is tall in the X direction.

[0050] The jig 1 further includes a contact portion 10 having a first surface 30 and a second surface 20, and the second surface 20 has a flat pressing portion 24 in a central portion 23 for pressing the bottom portion 84 into it.

[0051] With this configuration, compared to when a non-flat pushing portion 24 is brought into contact with the bottom 84 of the packaging bag 80, it is possible to further prevent the jig 1 from being biased toward either bottom end 85 in the X direction of the bottom 84 of the packaging bag 80, thereby preventing excessive force from being applied to the packaging bag 80.

[0052] In addition, in the jig 1, the pressing portion 24 is arranged symmetrically across the center of the second surface 20 in the Y direction perpendicular to the Z direction along the surface 89 of the packaging bag 80 when viewed from the surface 89 of the packaging bag 80.

[0053] According to this configuration, compared to a case where the pushing portions 24 are not provided line-symmetrically, a force is applied uniformly to the bottom portion 84 of the packaging bag 80, and the jig 1 can be pushed in more evenly.

[0054] Furthermore, in the jig 1, when viewed from the surface 89 of the packaging bag 80, the length of the second surface 20 in the Y direction perpendicular to the Z direction along the surface 89 is at least one-third of the length of the bottom 84 of the packaging bag 80.

[0055] According to this configuration, compared to when the length of the second surface 20 is shorter than one-third of the length of the bottom 84 of the packaging bag 80, a force can be applied more uniformly to the bottom 84 of the packaging bag 80.

[0056] In addition, in the jig 1, when viewed from the surface 89 of the packaging bag 80, the Y end 26 of the second surface 20 in the Y direction perpendicular to the Z direction along the surface 89 is tapered such that the width between the first surface 30 and the second surface 20 becomes smaller as it approaches the Y direction side surface 14 of the contact portion 10.

[0057] With this configuration, excessive force can be prevented from being applied to the bottom side surface 86 of the bottom 84 of the packaging bag 80, compared to when the Y end portion 26 of the contact portion 10 is not tapered and the angle between the second surface 20 and the Y side surface 14 is a right angle when viewed from the surface 89 of the packaging bag 80.

[0058] In addition, the first surface 30 has a central portion 33 positioned closer to the tear-open portion 82 than one X end portion 32 and the other X end portion 32 in the X direction.

[0059] According to this configuration, compared to when the angle formed between the first surface 30 of the contact portion 10A and the X-side surface 12 is a right angle, it is possible to prevent the jig 1 from getting caught on the packaging bag 80 when removing the jig 1 from the packaging bag 80. When the packaging bag 80 is a bag with a zipper, it is possible to particularly prevent the jig 1 from getting caught on the packaging bag 80.

[0060] In addition, in the jig 1, the angle formed by one X end 22 or the other X end 22 in the X direction and the pressing portion 24 recessed from the one X end 22 or the other X end 22 is an obtuse angle.

[0061] With this configuration, compared to when the area between each end 22 and the pushing portion 24 is curved and has no corners, it is possible to prevent the V-shaped tip of the bottom 84 of the packaging bag 80 from shifting and coming off the pushing portion 24 when the packaging bag 80 is pushed in.

[0062] The jig 1 further includes a base portion 70 for fixing the jig 1, and a support portion 40 for connecting the base portion 70 and the contact portion 10.

[0063] According to this configuration, the jig 1 can be fixed to any base, compared to when the jig 1 does not have the base portion 70.

[0064] In addition, in the jig 1, the length from at least a part of the base portion 70 to the second surface 20 of the contact portion 10 is approximately the same as the length from the opening end 83 of the packaging bag 80 to the bottom end 85 of the packaging bag 80.

[0065] According to this configuration, when the packaging bag 80 is pushed into the base portion 70, the bottom portion 84 of the bag can be expanded, and the application of excessive force can be suppressed.

[0066] ---Variations--- The present invention is not limited to the above-described embodiments. In other words, designs that are produced by those skilled in the art with appropriate design modifications to the above-described specific examples are also included within the scope of the present invention as long as they include the features of the present invention. Furthermore, the elements of the above-described embodiments and the following modifications can be combined to the extent technically possible, and such combinations are also included within the scope of the present invention as long as they include the features of the present invention.

[0067] For example, the contact portion 10 may be provided with two or more pressing portions 24. FIG. 5 is a schematic perspective view showing a contact portion 10A according to a modified example. As shown in FIG. 5, two pressing portions 24 may be provided as the pressing portion 24. In this case, the length of the pressing portion 24 in the Y direction refers to the length in the Y direction between one end and the other end of the pressing portion 24 in the Y direction, as in the first embodiment. In other words, the length of the pressing portion 24 in the Y direction refers to the length in the Y direction between the end of one pressing portion 24 on one Y side surface 14 side and the end of the other pressing portion 24 on the other Y side surface 14 side.

[0068] Furthermore, in the embodiment, the pushing portion 24 has been described as having a rectangular shape in plan view as an example, but the shape of the pushing portion 24 is not limited to this. For example, the pushing portion 24 may have a Z-shape, a wave shape, a lightning bolt shape, or the like in plan view. The shape of the pushing portion 24 may be appropriately designed so that the length of the pushing portion 24 in the Y direction is equal to or greater than the minimum length required to apply a uniform force to the bottom 84 of the packaging bag 80, and is equal to or less than the maximum length required to avoid applying excessive force to the bottom side surface 86 of the packaging bag 80.

[0069] FIG. 6 is a schematic perspective view showing a contact portion 10B according to a modified example. As shown in FIG. 6, the second surface 20 and the first surface 30 of the contact portion 10B are each formed on an arc. In the embodiment, the second surface 20 of the contact portion 10 has the pressing portion 24 and the groove 28 formed in the central portion 23 as an example. However, as in the case of the contact portion 10B, the second surface 20 does not necessarily have to have the pressing portion 24 and the groove 28 separately formed therein. That is, the second surface 20 may have any shape in which the central portion 23 is recessed relative to both the one X end 22 and the other X end 22. In this case, the jig 1 can press the V-shaped bottom 84 of the packaging bag 80 at any point on the second surface 20. Furthermore, although the Y end 26 has a tapered width and height as an example, the Y end 26 may have a non-tapered shape as in the case of the contact portion 10B.

[0070] FIG. 7 is a schematic perspective view showing a contact portion 10C according to a modified example.

[0071] As shown in FIG. 7, the pressing portion 24 of the contact portion 10C has a zigzag shape on the upper surface when the jig 1 is viewed from the Y direction. This prevents the bottom portion 84 from sliding off the jig 1, for example, when the V-shaped tip of the bottom portion 84 gets caught on the zigzag when the bottom portion 84 is pressed in. The interval and angle of the zigzag can be set as desired. For example, the angle can be adjusted within a range of 30 degrees to 120 degrees. Furthermore, the shape of the pressing portion 24 may be a wavy line shape with gently curved corners, in addition to a zigzag shape.

[0072] 1 shows the Y-direction length of the contact portion 10 and the Y-direction length of the support portion 40 as being approximately the same length, the Y-direction length of the contact portion 10 may be longer or shorter than the Y-direction length of the support portion 40. Here, if the Y-direction length of the contact portion 10 is longer than the Y-direction length of the support portion 40, there is a risk that the first surface 30 of the jig 1 will get caught on the surface 89 of the packaging bag 80 when the jig 1 is removed from the packaging bag 80. Therefore, the end of the first surface 30 may be tapered so that the width between the first surface 30 and the second surface 20 decreases toward the Y-direction side surface 14 of the contact portion 10. This makes it possible to prevent the jig 1 from getting caught on the packaging bag 80 when the jig 1 is removed from the packaging bag 80.

[0073] FIG. 8 is a schematic diagram showing a jig 1 according to a modified example.

[0074] 4, the X-side surface 12 is shown as being horizontal to the Z direction, the surface of the first surface 30 that contacts the support column 40 is shown as being perpendicular to the Z direction, and the surface of the first surface 30 that does not contact the support column 40 is shown as being tapered, but the shape of the jig 1 is not limited to this. For example, as shown in FIG. 8, the X-side surface 12 may be shaped so as to be in direct contact with the surface of the first surface 30 that contacts the support column 40. This makes it possible to prevent the jig 1 from getting caught on the packaging bag 80 when the jig 1 is removed from the packaging bag 80.

[0075] Furthermore, for example, the width of the contact portion 10 in the X direction may be increased to match the structure of the bottom 84 of the packaging bag 80. Furthermore, the first surface 30 may have a curved shape to match the structure of the bottom 84 of the packaging bag 80. For example, the first surface 30 may have a shape in which the distance between the X ends 22 of the second surface 20 increases from the end in the Y direction toward the center when viewed in a plan view. This allows the jig 1 to press the bottom 84 in accordance with the structure of the bottom 84, preventing a situation in which part of the bottom 84 cannot be pressed in and therefore does not expand. In other words, the stability of the bottom opening of the bottom 84 by the jig 1 can be improved.

[0076] In addition, although the pushing portion 24 has been configured to be substantially line-symmetric in the Y direction as an example, it may be provided biased to either side in the Y direction. However, in order to prevent excessive pushing of the bottom side surface 86 of the packaging bag 80, it is more preferable that the pushing portion 24 be line-symmetric in the Y direction.

[0077] Furthermore, although the support column 40 has been shown as having a flat plate shape as an example, the shape of the support column 40 is not limited to this. For example, the support column 40 may have a cylindrical, rectangular parallelepiped, hexagonal prism, or other shape.

[0078] In addition, although the embodiment in which the support portion 40 and the base portion 70 are connected by fitting the connection portion 48 of the support portion 40 and the connection portion 78 of the base portion 70 together has been described as an example, the method of connecting the support portion 40 and the base portion 70 is not limited to this. For example, the components may be connected to each other using a magnet. Similarly, the method of connecting the contact portion 10 and the support portion 40 is not limited to a connection method using fitting.

[0079] FIG. 9 is a schematic perspective view showing a jig 1 according to a modified example.

[0080] In the embodiment, one contact portion 10 is provided on the jig 1 as an example. However, two or more jigs 1 may be provided. For example, as shown in FIG. 9 , a modified jig 1 may include two contact portions 10E. Each contact portion 10E includes a connecting portion 38, which fits with a connecting portion 46 of the support portion 40. Each pressing portion 24 provided on each contact portion 10E can press into the bottom 84 of the packaging bag 80. While FIG. 9 shows a configuration in which the connecting portion 46 of the support portion 40 is hole-shaped, the connecting portion 46 may be groove-shaped, and the connecting portion 38 of the contact portion 10 may be convex. In this case, the connecting portion 38 may be slidable along the groove-shaped connecting portion 46. This allows the arrangement of each contact portion 10E in the Y direction to be easily changed to match the structure of the bottom 84 of the packaging bag 80. That is, the length of the pressing portion 24 in the Y direction can be easily changed.

[0081] In addition, although the packaging bag 80 has been exemplified as having an envelope-like shape in which the side surfaces 88 are longer than the bottom surface 84, the packaging bag 80 may have an envelope-like shape in which the side surfaces 88 are longer than the bottom surface 84, or in which the lengths of the bottom surface 84 and the side surfaces 88 are substantially the same. The packaging bag 80 may also have an envelope-like shape in which the lengths of the bottom surface 84 and the tear-opening portion 82 are different. The dimensions of the packaging bag 80 are not particularly limited and can be appropriately selected depending on the usage. For example, the length from the tear-opening portion edge 83 of the packaging bag 80 to the bottom surface 85 of the packaging bag 80 can be 50 to 150 mm, 150 to 250 mm, or 250 to 400 mm. For example, the length of the bottom surface 84 of the packaging bag 80 in the third direction (Y direction) can be 50 to 100 mm, 100 to 200 mm, or 200 to 250 mm. For example, the length of the bottom 84 of the packaging bag 80 in the first direction (Z direction) can be set to 5 to 30 mm, 30 to 60 mm, or 60 to 100 mm.

[0082] Furthermore, although the packaging bag 80 has been described as including a paper base layer as an example, the packaging bag 80 may be made of only a resin film. [Explanation of symbols]

[0083] 1: jig, 20: second surface, 22: end (X-end), 23: center, 30: first surface, 80: packaging bag, 82: opening portion, 84: bottom, 88: side

Claims

1. A tool for pushing and expanding a bottom of an envelope-shaped packaging bag having a bottom facing an opening portion into which food is to be filled, a first surface that is located on the side of the opening portion in a first direction that is an insertion direction of the jig when the jig is inserted from the opening portion and in contact with the bottom portion and viewed from a side of the packaging bag; a second surface located on the bottom side in the first direction, the second surface having a central portion recessed in a second direction perpendicular to the first direction when viewed from a side of the packaging bag relative to one end and the other end; A jig comprising:

2. a contact portion having the first surface and the second surface; The second surface has a flat depression portion in the central portion that depressions the bottom portion. The jig according to claim 1 .

3. The pushing portions are provided symmetrically across a center of the second surface in a third direction perpendicular to the first direction along the surface of the packaging bag when viewed from the surface of the packaging bag. The jig according to claim 2 .

4. When viewed from the surface of the packaging bag, the second surface has a length in a third direction perpendicular to the first direction along the surface, which is one-third or more of the length of the bottom of the packaging bag. The jig according to claim 2 .

5. an end portion of the second surface in a third direction perpendicular to the first direction along the surface when viewed from the surface of the packaging bag is tapered so that the width between the first surface and the second surface decreases toward the side surface of the contact portion in the third direction; The jig according to claim 2 .

6. In the second direction, a central portion of the first surface is located closer to the opening portion than one end and the other end. The jig according to claim 2 .

7. an angle formed by the one end or the other end in the second direction and the push-in portion recessed from the one end or the other end is an obtuse angle, The jig according to claim 2 .

8. a base portion for fixing the jig; a support portion connecting the base portion and the contact portion; The jig of claim 2 , further comprising:

9. a length from at least a part of the base portion to the second surface of the contact portion is substantially the same as a length from an end of the opening portion of the packaging bag to a bottom end of the packaging bag; The jig according to claim 8.

Images