container

Abstract

To provide a container suppressed in occurrence of a step caused by adhesion of an adhesive piece, and manufacturable in an outer dimension as designed.SOLUTION: A container (packaging box) 10 has a bottom plate 11, side plates 13A, 13B continued to the bottom plate 11, a pair of end plates 21 continued to the bottom plate 11, and total four adhesive pieces 22 continued to the side plates 13A, 13B and stuck to outer side faces of the end plates 21. A pair of first folding parts 25 provided to correspond to the pair of adhesive pieces 22, a second folding part 26 provided between the pair of first folding parts 25, and a punching part 27 continued to at least one of the first folding parts 25 and the second folding parts 26 and penetrating through the end plate 21 to extend in the direction separating from the bottom pate 11 are provided between the bottom plate 11 and the pair of end plates 21.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Patent Document 1 discloses a container with one open end, which includes a pair of side plates arranged opposite each other, end plates connected to each of the pair of side plates, and a pair of lid walls. Each lid wall includes a pair of flaps connected to each of the pair of side plates, and an adhesive strip connected to the end plate. In Patent Document 1, in order to improve the adhesiveness of the adhesive strip, the adhesive strip is attached to the outer surface of one of the pair of flaps (first flap), and the other of the pair of flaps (second flap) is attached to this outer surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 58-30935 Summary of the Invention [Problem to be solved by the invention]

[0004] In the container of Patent Document 1, the adhesiveness of the adhesive piece to the first flap can be improved. However, the attachment of the adhesive piece creates a step on the outer surface of the first flap. The container of Patent Document 1 does not take into consideration the possibility that the step may cause the second flap to bulge, resulting in the container not achieving the designed outer dimensions.

[0005] An object of the present invention is to provide a container that can be manufactured into a box with the designed outer dimensions while suppressing the occurrence of steps that occur due to the application of adhesive strips. [Means for solving the problem]

[0006] One aspect of the present invention is a device comprising: a bottom plate extending in a first direction and a second direction intersecting the first direction; a pair of side plates connected to both ends of the bottom plate in the first direction and extending in the second direction and a third direction intersecting both the first and second directions; a top plate connected to both ends of the pair of side plates in the third direction and positioned at a distance from the bottom plate in the third direction; a pair of end plates connected to both ends of the bottom plate in the second direction and extending in the first and third directions; four adhesive strips connected to both ends of the pair of side plates in the second direction and attached to outer surfaces of adjacent end plates; and a cover plate connected to both ends of the top plate in the second direction and attached to outer surfaces of the end plate and the pair of adhesive strips, A pair of The container is provided with a pair of first bent portions provided on both sides in the first direction to correspond to the adhesive pieces and each extending in the first direction, a second bent portion provided at a distance outside the first bent portions in the second direction and extending in the first direction between the pair of first bent portions, and a punched portion connected to at least one of the first bent portions and the second bent portion, penetrating the end plate and extending in a direction away from the bottom plate along the third direction.

[0007] Another aspect of the present invention is a device comprising a bottom plate extending in a first direction and a second direction intersecting the first direction; a pair of side plates connected to both ends of the bottom plate in the first direction and extending in the second direction and a third direction intersecting both the first and second directions; a pair of end plates connected to both ends of the bottom plate in the second direction and extending in the first and third directions; and a total of four adhesive tapes connected to both ends of the pair of side plates in the second direction and attached to outer surfaces of the adjacent end plates. and a pair of adhesive pieces, and a pair of first bent portions are provided between the bottom plate and the pair of end plates on both sides in the first direction to correspond to the pair of adhesive pieces, and each extending in the first direction; a second bent portion is provided outside the first bent portions in the second direction with a gap therebetween and extends in the first direction between the pair of first bent portions; and a punched portion is connected to at least one of the first bent portions and the second bent portions, penetrates the end plate, and extends in the third direction away from the bottom plate. a top plate that closes the ends of the pair of side plates and the pair of end plates in the third direction and is positioned with a gap in the third direction from the bottom plate; Provide a container.

[0008] The end plate has a step formed by the first bent portion, the second bent portion, and the punched portion, and an adhesive piece is attached at a position corresponding to the first bent portion. The step in the end plate can absorb the thickness of the adhesive piece, so the generation of a step that would otherwise occur when attaching the adhesive piece to the outer surface of the end plate can be suppressed, and the outer surface of the end plate and the outer surface of the adhesive piece can be positioned flush. This allows the container to be manufactured with the designed external dimensions. [Effects of the Invention]

[0009] According to the container of the present invention, the occurrence of steps due to the application of adhesive strips is suppressed, and the container can be manufactured to the designed external dimensions. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view of a packaging box according to a first embodiment of the present invention. [Figure 2A] FIG. 2 is a bottom view of the packaging box of FIG. 1. [Figure 2B] Enlarged view of part II in Figure 2A. [Figure 3A]FIG. 2 is a plan view showing a blank for the packaging box of FIG. 1; [Figure 3B] Enlarged view of part III of the blank in Figure 3A. [Figure 4A] FIG. 10 is a perspective view showing a process for manufacturing a packaging box. [Figure 4B] A partial enlarged view of Figure 4A. [Figure 5] FIG. [Figure 6] FIG. 3C is an enlarged view similar to FIG. 3B, showing a modified example of the packaging box. [Figure 7] FIG. 3C is an enlarged view similar to FIG. 3B, showing another modified example of the packaging box. [Figure 8] FIG. 3C is an enlarged view similar to FIG. 3B, showing another modified example of the packaging box. [Figure 9] FIG. 3C is an enlarged view similar to FIG. 3B, showing another modified example of the packaging box. [Figure 10] FIG. 3C is an enlarged view similar to FIG. 3B, showing another modified example of the packaging box. [Figure 11] FIG. 3C is an enlarged view similar to FIG. 3B, showing another modified example of the packaging box. [Figure 12] FIG. 3C is an enlarged view similar to FIG. 3B, showing another modified example of the packaging box. [Figure 13] FIG. 10 is a perspective view of a packaging box according to a second embodiment of the present invention. [Figure 14] FIG. 14 is a plan view showing the blank of the packaging box of FIG. 13. [Figure 15] 14 is a perspective view showing a process for manufacturing the packaging box of FIG. 13. [Figure 16] FIG. 14 is a perspective view showing the packaging box of FIG. 13 in an opened state. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the X direction is the width direction of the container and is the first direction of the present invention. The Y direction is the length direction of the container and is the second direction of the present invention. The Z direction is the height (thickness) direction of the container and is the third direction of the present invention.

[0012] (First embodiment) Referring to FIG. 1, a packaging box 10, which is an example of a container according to a first embodiment of the present invention, is a post-in case of a size that can be dropped into a post. The width direction X dimension of the packaging box 10 is smaller than the length direction Y dimension, and the height direction Z dimension is also smaller than the width direction X dimension. The width direction X dimension of the packaging box 10 is set in the range of 175 mm to 250 mm, and is set to 225 mm in this embodiment. The length direction Y dimension of the packaging box 10 is set in the range of 230 mm to 350 mm, and is set to 310 mm in this embodiment. The height direction Z dimension of the packaging box 10 is set in the range of 10 mm to 60 mm, preferably 20 mm to 30 mm, and is set to 25 mm in this embodiment.

[0013] The packaging box 10 is formed by folding and pasting a single blank shown in Figure 3A at predetermined locations. The blank is formed by punching a cardboard sheet using a well-known paper container punching device. The cardboard sheet has a well-known configuration in which a wavy core is disposed between a front liner (the outer surface of the packaging box 10) and a back liner (the inner surface of the packaging box 10). The portion shown by the dashed dotted line in Figure 3A is a general-purpose score line formed by scoring from the back liner to compress the wall thickness. The portion shown by the solid line in Figure 3A is a cutting line formed by cutting a blade from the back liner to the front liner, and a shape line (edge) formed by punching.

[0014] 1, the packaging box 10 includes a bottom plate 11, a top plate 12, side plates 13A and 13B, and a pair of cover walls 20. Each cover wall 20 includes an end plate 21, a pair of adhesive strips 22 attached to the outer surface of the end plate 21, and a cover plate 23 attached to the outer surface of each of the end plate 21 and the adhesive strips 22. In this embodiment, the cover plate 23 located on the outermost side of the cover wall 20 can be attached flatly without any steps, allowing the packaging box 10 to be manufactured to the designed outer dimensions.

[0015] The bottom plate 11, the top plate 12, the side plates 13A and 13B, and the pair of cover walls 20 will be specifically described below.

[0016] The bottom plate 11 and the top plate 12 are both formed in a substantially identical rectangular shape extending along the XY plane, and are spaced apart in the height direction Z. However, the bottom plate 11 and the top plate 12 do not have to be configured to extend along the XY plane in the strict geometric sense, as long as they can be assembled into the packaging box 10.

[0017] The side plates 13A, 13B are both formed in a substantially identical rectangular shape extending along the YZ plane, and are spaced apart in the width direction X. However, the side plates 13A, 13B do not have to be configured to extend along the YZ plane in the strict geometric sense, as long as they can be assembled into the packaging box 10.

[0018] 1 and 2A, the side panels 13A and 13B are connected to both ends of the bottom panel 11 in the width direction X via bent portions 16 extending in the length direction Y, and are connected to both ends of the top panel 12 in the width direction X via bent portions 17 extending in the length direction Y.

[0019] The side panel (first side panel) 13A consists of a side panel main body 14 and a joint 15, which are attached with an adhesive such as a hot melt resin. The side panel (second side panel) 13B consists of a single cardboard sheet. Referring to Figure 3A, the side panel main body 14, bottom panel 11, side panel 13B, top panel 12, and joint 15 are connected in this order from bottom to top.

[0020] 3A, the bottom panel 11 is connected at its top and bottom by fold lines 16a that form the bent portion 16. The fold lines 16a are made up of a plurality of general-purpose creases 18 spaced apart in the longitudinal direction Y and cut lines 19 between adjacent general-purpose creases 18. The spacing between adjacent cut lines 19 is set to a dimension that makes them unlikely to connect or break when subjected to external force. The cut lines 19 are connected to adjacent general-purpose creases 18 and include protrusions 19a that protrude in an arc outward in the width direction X beyond the general-purpose creases 18. These protrusions 19a form protruding portions at corresponding locations on the bottom panel 11 (see FIG. 2A). The bent side panel 13B and the side panel main body 14 interfere with these protruding portions, preventing the side panel 13B and the side panel main body 14 (side panel 13A) from returning to their flat position relative to the bottom panel 11.

[0021] 3A, the top panel 12 is connected to the joint 15 and the side panel 13B at the top and bottom via fold lines 17a and 17b that form the folding portion 17. Similar to fold line 16a, fold line 17a between top panel 12 and side panel 13B is composed of multiple general-purpose creases 18 and cut lines 19 provided between adjacent general-purpose creases 18. Fold line 17b between top panel 12 and the joint 15 is composed of a lead crease that includes a general-purpose crease extending in the length direction Y and multiple cut lines provided on this general-purpose crease at intervals in the length direction Y. The spacing between adjacent cut lines of fold line 17b is set to a dimension that makes it difficult for the creases to connect with each other or break when an external force is applied.

[0022] 1, the pair of lid walls 20 are each formed in the same rectangular shape extending along the XZ plane, and are spaced apart in the longitudinal direction Y. However, the lid walls 20 do not have to be configured to extend along the XZ plane in the strict geometric sense, as long as they can be assembled into the packaging box 10.

[0023] Each cover wall 20 is connected to the top plate 12, the bottom plate 11, and the side plates 13A and 13B, respectively, and closes the openings at both ends in the longitudinal direction Y defined by these plates. Each cover wall 20 includes an end plate 21 connected to the bottom plate 11, a pair of attachment pieces 22 connected to the side plates 13A and 13B, respectively, and a cover plate 23 connected to the top plate 12. The pair of attachment pieces 22 are attached to the outer surfaces of adjacent end plates 21 with an adhesive such as hot-melt resin, and then the cover plate 23 is attached to the outer surfaces of the end plates 21 and the outer surfaces of the pair of attachment pieces 22 with an adhesive such as hot-melt resin, thereby forming the cover wall 20.

[0024] Both the end plate 21 and the covering plate 23 are elongated strips, and the pair of adhesive pieces 22 are generally trapezoidal. The height direction Z dimension of the end plate 21 and the height direction Z dimension of the covering plate 23 are both smaller than the height direction Z dimension of the side plates 13A, 13B and greater than half the height direction Z dimension of the side plates 13A, 13B. The height direction Z dimension of the adhesive piece 22 is smaller than the height direction Z dimension of the end plate 21.

[0025] 1 and 2A, the end plate 21 is connected to the bottom plate 11 via a bent portion 24. The pair of adhesive pieces 22 are connected to the side plates 13A and 13B via bent portions 29. Referring to FIG. 1, the cover plate 23 is connected to the top plate 12 via a bent portion 30.

[0026] If the adhesive piece 22 were to be affixed to the inner surface of the end plate 21, the repulsive force of the end plate 21 relative to the bottom plate 11 would be greater than the repulsive force of the adhesive piece 22 relative to the side plates 13A and 13B. Therefore, when the end plate 21 is bent relative to the bottom plate 11, the end plate 21 would move away from the adhesive piece 22, reducing adhesion. In contrast, in this embodiment, the adhesive piece 22 is affixed to the outer surface of the end plate 21, so when the end plate 21 is bent relative to the bottom plate 11, the repulsive force brings the end plate 21 closer to the adhesive piece 22. Therefore, compared to when the adhesive piece 22 is affixed to the inner surface of the end plate 21, this embodiment improves adhesion between the end plate 21 and the adhesive piece 22.

[0027] However, when the adhesive piece 22 is attached to the outer surface of the end plate 21, a step may occur on the outer surface of the end plate 21 due to the attachment of the adhesive piece 22. Therefore, in this embodiment, a folding portion 24 having a pair of first folding portions 25 and one second folding portion 26 is provided between the bottom plate 11 and the end plate 21, and a punched portion 27 is provided between the first folding portion 25 and the second folding portion 26.

[0028] The bent portion 24 between the bottom plate 11 and the end plate 21, the bent portion 29 between the side plates 13A, 13B and the adhesive piece 22, and the bent portion 30 between the top plate 12 and the cover plate 23 will be specifically described below.

[0029] 2A and 2B, the bent portion 24 between the bottom plate 11 and the end plate 21 includes a pair of first bent portions 25 and one second bent portion 26, and extends in the width direction X as a whole. A punched portion 27 is provided between each of the first bent portions 25 and the second bent portion 26. The pair of first bent portions 25 and the one second bent portion 26 are positioned at an interval in the length direction Y, and the punched portion 27 is formed to establish this positional relationship.

[0030] Referring to Figures 3A and 3B, the pair of end plates 21 are connected to both sides of the bottom plate 11 in the longitudinal direction Y via a first fold line 25a that constitutes the first fold portion 25 and a second fold line 26a that constitutes the second fold portion 26.

[0031] 2A and 2B, the first bent portions 25 are provided on both ends of the end plate 21 in the width direction X to correspond to the adhesive pieces 22, and extend in the width direction X. The length of the first bent portions 25 in the width direction X is equal to or longer than the entire length of the adhesive pieces 22 in the width direction X (length L2 shown in FIG. 3B), and corresponds to the distance S2 from the fold line 16a to the punched portion 27 shown in FIG. 3. The first bent portions 25 form a first portion 21a (see FIG. 4B) in the end plate 21 that corresponds in the height direction Z to the area where the first bent portions 25 are provided.

[0032] 3A and 3B, first fold line 25a constituting first bent portion 25 is, like fold line 17b, a lead crease in which a pair of cut lines are provided at an interval on a general-purpose crease.

[0033] 2A and 2B, the second bent portions 26 are provided outwardly of the first bent portions 25 in the length direction Y with a gap therebetween, and extend in the width direction X between the pair of first bent portions 25. Both ends of the second bent portion 26 and the ends of the pair of first bent portions 25 are respectively located at the same positions in the width direction X and positioned with a gap therebetween in the length direction Y. The second bent portions 26 form second portions 21b (see FIG. 4B) in the end plate 21, which correspond to the region in the height direction Z where the second bent portions 26 are provided and are positioned further outwardly than the first portions 21a in the length direction Y.

[0034] 3A and 3B, second fold line 26a constituting second bent portion 26 is, like fold line 17b, a lead crease in which a plurality of cutting lines are provided at intervals on a general crease.

[0035] The offset dimension S1 (see FIG. 3B), which is the distance between the first fold line 25a and the second fold line 26a, is preferably set to the thickness of one cardboard sheet, more specifically, in the range of 0.5 mm to 2.0 mm, and is set to 1 mm in this embodiment. If the offset dimension S1 is made too small, a step may occur on the outer surface of the end plate 21 due to the attachment of the adhesive piece 22. This reduces the adhesion of the cover plate 23 to the end plate 21 and the resulting packaging box 10 does not have the designed outer dimensions. If the offset dimension S1 is made too large, the outer surface of the adhesive piece 22 may be positioned more inward in the length direction Y than the outer surface of the central portion of the end plate 21 in the width direction X, resulting in a step. This reduces the internal volume of the resulting packaging box 10. To prevent these inconveniences and ensure that the outer surface of the end plate 21 and the outer surface of the adhesive piece 22 are flush with each other, it is preferable to set the difference in level S1 between the first fold line 25a and the second fold line 26a within the range specified above.

[0036] 2B, 3B, and 4B, punched portion 27 is formed by a cutting line that penetrates a portion of bottom plate 11 and end plate 21, and is provided to partially allow deformation of end plate 21 in length direction Y. Punched portion 27 is partially connected to first bent portion 25 and second bent portion 26, and extends through end plate 21 in height direction Z. More specifically, punched portion 27 includes a continuous portion 27a and a punched portion main body 27b that is continuous with continuous portion 27a.

[0037] The continuous portion 27a extends linearly in the longitudinal direction Y from the end of the first fold line 25a on the second fold line 26a side to the end of the nearby second fold line 26a. In other words, the continuous portion 27a is provided between the fold lines 25, 26 and is continuous with the first fold line 25 and the second fold line 26. Here, "continuing with the fold lines 25, 26" does not mean that the continuous portion 27a is continuous with the fold lines 25a, 26a in the blank state shown in FIG. 3B, but means that it is continuous in the box-formed state shown in FIG. 2B. In other words, in the blank state shown in FIGS. 3A and 3B, the continuous portion 27a may be positioned with a gap between it and the ends of the fold lines 25a, 26a.

[0038] The punching portion body 27b is continuous with the continuous portion 27a, extends upward in the height direction Z relative to the end plate 21, and divides the end plate 21 into a first portion 21a on the outer side in the longitudinal direction Y and a second portion 21b in the center in the longitudinal direction Y. More specifically, the punching portion body 27b of this embodiment includes a dividing portion 27c and a breakage prevention portion 27d.

[0039] 3B and 4B, the dividing portion 27c extends in the height direction Z from the end of the second folding portion 26 (second folding line 26a) on the first folding portion 25 (first folding line 25a) side along the linear tip portion 22a of the adhesive piece 22. The dividing portion 27c in this embodiment extends in the same straight line as the continuous portion 27a.

[0040] Break prevention portion 27d extends in a curved line from the upper end of dividing portion 27c in the height direction Z toward the outer side in the width direction X as it moves upward in the height direction Z, preventing end plate 21 from breaking in an unintended direction due to the application of external force. The upper end of break prevention portion 27d and the upper edge of end plate 21 are positioned at a distance that will not cause breakage due to external forces that may be applied during normal use. In other words, a continuous portion 21c without punched portion 27 is secured at the upper part of end plate 21.

[0041] The length L1 (see FIG. 3B) of the breakage prevention portion 27d from the dividing portion 27c to the outer end of the breakage prevention portion 27d in the width direction X is preferably greater than zero and not greater than 10 mm when the thickness of the end plate 21 is 20 mm or greater and 30 mm or less. When the thickness of the end plate 21 is 50 mm, the length L1 is preferably greater than zero and not greater than 20 mm. Furthermore, the distance from the outer end of the breakage prevention portion 27d in the width direction X to the outer end of the end plate 21 in the width direction X is preferably 3 mm or greater. If the length L1 of the breakage prevention portion 27d is zero, i.e., if the breakage prevention portion 27d is not formed, unintended tearing may occur at the upper end of the dividing portion 27c. If the length L1 of the breakage prevention portion 27d is excessively long, unintended bending may occur in the continuous portion 21c of the end plate 21. To prevent these inconveniences, the length L1 of the breakage prevention portion 27d is preferably set within the above-specified range.

[0042] 3B and 4B, the distance from the bent portion 29 between the side plates 13A, 13B and the adhesive piece 22 to the dividing portion 27c of the punched portion main body 27b, i.e., the maximum distance from the bent portion 29 to the farthest portion of the punched portion 27, is the same as the distance S2 from the bent line 16a to the dividing portion 27c. This distance S2 is set to be equal to or greater than the length L2 from the bent line 29a (bent portion 29) to the tip of the adhesive piece 22. For example, if the length L2 from the bent portion 29 to the tip of the adhesive piece 22 is 24 mm, the distance S2 from the bent line 16a (bent portion 29) to the dividing portion 27c is set to be in the range of 24 mm to 29 mm. However, the length L2 of the adhesive piece 22 and the distance S2 to the dividing portion 27c do not have to be the same dimensions in the strict geometric sense, particularly in the blank state shown in Figure 3A, as long as the tip of the adhesive piece 22 and the dividing portion 27c are configured to coincide in the width direction X when the box is made.

[0043] 3B and 4B, the length L3 in the height direction Z of the punched portion body 27b is set to be at least one-third of the width W in the height direction Z of the adhesive piece 22 and to be equal to or less than a dimension sufficient to ensure the continuous portion 21c of the end plate 21. The width W of the adhesive piece 22 is defined as the distance from the upper end to the lower end of the pair of chamfered portions 22b connected to the upper and lower ends of the tip portion 22a. If the length L3 of the punched portion body 27b is made too short, the area in which a step is formed between the first portion 21a and the second portion 21b of the end plate 21 will be reduced, which may result in a step between the upper side of the adhesive piece 22 and the second portion 21b. If the length L3 of the punched portion body 27b is made too long, the continuous portion 21c will not be ensured. Therefore, it is preferable to set the length L3 of the punched portion body 27b within the above-specified range.

[0044] 3B and 4B, fold line 28 is provided in continuous portion 21c above breakage prevention portion 27d of end plate 21 to promote the formation of a step between first portion 21a and second portion 21b. Fold line 28 is a general-purpose crease that slopes upward in the height direction Z from the outer end of breakage prevention portion 27d toward the outside in the width direction X of end plate 21. In other words, fold line 28 slopes toward top plate 12 as it extends from the end of punching portion main body 27b facing top plate 12 toward the outside in the width direction X.

[0045] 1 and 2B, the bent portion 29 between the side plates 13A, 13B and the adhesive pieces 22 extends in the height direction Z. Referring to FIGS. 3A and 3B, a total of four adhesive pieces 22 are connected to both sides of the side plate 13B and the side plate main body 14 in the length direction Y via fold lines 29a that form the bent portion 29. Similar to the fold line 17b, the fold line 29a is a lead crease in which multiple cutting lines are provided at intervals on a general-purpose crease.

[0046] 1, the bent portion 30 between the top plate 12 and the cover plate 23 includes a non-breakable portion 31 that is difficult to break when an external force is applied, and a breakable portion 32 that can be broken when an external force is applied, and extends linearly as a whole in the width direction X. Referring to FIGS. 3A and 3B, the cover plate 23 is connected to both sides of the top plate 12 in the length direction Y via a fold line 31a that constitutes the non-breakable portion 31 and a break line 32a that constitutes the breakable portion 32.

[0047] 1, non-breaking portion 31 is provided on side panel 13A. Referring to FIG. 3A, folding lines 31a constituting non-breaking portion 31 are made up of general-purpose creases and lead creases made up of multiple cutting lines. The spacing between adjacent cutting lines is set to a dimension that makes it difficult for the lines to connect with each other and break when an external force is applied.

[0048] Referring to FIG. 1, the breaking portion 32 is provided on the side panel 13B side. Referring to FIG. 3A, the breaking lines 32a constituting the breaking portion 32 are Y-zippers, each consisting of a plurality of roughly Y-shaped tear lines spaced at a breakable interval. Here, the breakable interval refers to the distance at which adjacent Y-shaped tear lines can be connected to each other by the application of an external force. The breaking lines 32a constitute part of the opening structure 35, which will be described in detail later. Note that if the opening structure 35 is not provided, the folding portion 30 is composed only of the fold line 31a without the breaking lines 32a.

[0049] Next, an example of a method for manufacturing the packaging box 10 of the first embodiment will be described.

[0050] First, in the blank state shown in Fig. 3A, the pair of end plates 21 are bent along the bending lines 25a and 26a relative to the bottom plate 11. As a result, as shown in Fig. 4B, the first portion 21a of the end plate 21 extends along the XZ plane from the first bent portion 25, and the second portion 21b extends along the XZ plane from the second bent portion 26, which is positioned outward in the longitudinal direction Y relative to the first portion 21a. In other words, a step of the difference in height dimension S1 shown in Fig. 3B is formed between the first portion 21a and the second portion 21b of the end plate 21.

[0051] Next, the side panel 13B and the side panel main body 14 are folded along the folding line 16a relative to the bottom panel 11, and then the adhesive strip 22 is folded along the folding line 29a relative to the side panel 13B and the side panel main body 14. The adhesive strip 22 is then attached to the outer surface of the first portion 21a of the end panel 21 with an adhesive. This completes the sealing process shown in Figures 4A and 4B.

[0052] 2B and 4B, during the sealing process, the outer surface of the second portion 21b of the end plate 21 is located further outward in the longitudinal direction Y than the outer surface of the first portion 21a, and is generally flush with the outer surface of the adhesive piece 22. Even when the length L3 of the punched portion main body 27b is smaller than the width W of the adhesive piece 22, the outer surface of the adhesive piece 22 and the outer surface of the second portion 21b are generally flush with each other because the upper end of the first portion 21a of the end plate 21 is a free end that can bend inward, and the bend line 28 promotes this inward bending.

[0053] Next, after placing items on the bottom plate 11, the top plate 12 is folded along the fold line 17a relative to the side plate 13B. After that, the pair of cover plates 23 are folded relative to the top plate 12, and the cover plates 23 are attached with an adhesive to the outer surfaces of the second portions 21b of the end plates 21 and the outer surfaces of the adhesive pieces 22. In addition, the seams 15 are folded relative to the top plate 12, and the seams 15 are attached with an adhesive to the outer surfaces of the side plate bodies 14. This completes the sealed packaging box 10 shown in FIG. 1.

[0054] 2A and 2B, in the sealed packaging box 10, there is no step between the outer surface of the second portion 21b of the end plate 21 and the outer surface of the adhesive piece 22. This improves the adhesion of the covering plate 23 to the end plate 21 and the adhesive piece 22. Moreover, because the outer surfaces of the end plate 21 and the adhesive piece 22 can be arranged flush with each other, the outermost covering plate 23 can be attached in a flat state without any irregularities, allowing the packaging box 10 to be manufactured to the designed external dimensions. Furthermore, no gap due to a step is formed between the second portion 21b of the end plate 21 and the covering plate 23. This improves the sealing performance of the lid wall 20 consisting of the end plate 21, the pair of adhesive pieces 22, and the covering plate 23.

[0055] 1, the packaging box 10 configured in this manner is provided with an opening structure 35 for opening the top panel 12 side. Referring to FIGS. 1 and 3A, the opening structure 35 includes one operating portion 36, a pair of breaking lines (first breaking lines) 37, and a pair of second breaking lines. Of these, the pair of second breaking lines are formed by breaking lines 32a that form breaking portion 32 of folding portion 30.

[0056] The operating section 36 is provided at the center of the seam 15 in the longitudinal direction Y. The operating section 36 is defined by a pair of break lines 36a extending from the tip of the seam 15 toward the folding section 17 between the top plate 12. The break lines 36a consist of a one-sided zipper made up of a plurality of first cut lines extending along the height direction Z and second cut lines extending in the longitudinal direction Y from the lower ends of the first cut lines toward the center of the seam 15.

[0057] A pair of break lines 37 are provided on the top panel 12. Each of the pair of break lines 37 extends obliquely outward in the longitudinal direction Y from the side panel 13A toward the second side panel 13B, from the vicinity of break line 36a to the vicinity of break line 32a. In this embodiment, the break line 37 is composed of a break portion 37a consisting of a one-sided zipper and a break portion 37b consisting of a Y-zipper.

[0058] The pair of breaking lines 32a each comprises a Y zipper, and extends along the folding portion 30 from the outer end of the breaking line 37 in the length direction Y toward the folding portion 17 of the side plate 13B.

[0059] To open the sealed packaging box 10 shown in FIG. 1, the tip of the operating part 36 is grasped and pulled outward in the width direction X and upward in the height direction Z. This breaks the seam 15 along a pair of breaking lines 36a. Next, the operating part 36 is pulled in the width direction X toward the side panel 13B. This breaks the top panel 12 along a pair of breaking lines 37, and then the ridge between the top panel 12 and the cover wall 20 along a pair of breaking lines 32a. As a result, as shown in FIG. 5, the packaging box 10 can be opened while leaving a portion of the top panel 12.

[0060] The packaging box 10 configured in this manner has the following features.

[0061] Between the bottom plate 11 and the pair of end plates 21, there are a pair of first bent portions 25, a second bent portion 26 spaced apart from the first bent portion 25 outward in the longitudinal direction Y, and a punched portion 27 extending through the end plate 21 along the height direction Z. This creates a step in the end plate 21, and an adhesive piece 22 is attached to the first portion 21a corresponding to the first bent portion 25. The step in the end plate 21 absorbs the thickness of the adhesive piece 22, thereby preventing the creation of a step that would otherwise occur when attaching the adhesive piece 22 to the outer surface of the end plate 21. This allows the outer surfaces of the end plate 21 and the adhesive piece 22 to be positioned flush with each other. This allows the outermost cover plate 23 to be attached flat without any step. This allows the packaging box 10 to be manufactured with the designed outer dimensions.

[0062] The punched portion 27 has a continuous portion 27a that continues to the first bent portion 25 and the second bent portion 26. Therefore, a step can be reliably formed between the first portion 21a and the second portion 21b of the end plate 21.

[0063] The distance S2 from the bent portion 29 between the side plates 13A, 13B and the adhesive piece 22 to the punched portion main body 27b is equal to or greater than the length L2 from the bent portion 29 to the tip of the adhesive piece 22. Therefore, the tip of the adhesive piece 22 can be positioned closer to the bent portion 29 than the punched portion main body 27b, thereby reliably preventing a step from occurring between the end plate 21 and the adhesive piece 22.

[0064] The length L3 in the height direction Z of the punched portion main body 27b is equal to or greater than 1 / 3 of the width W in the height direction Z of the adhesive piece 22. Therefore, the adhesive piece 22 can be reliably pressed into the first portion 21a corresponding to the first bent portion 25, thereby preventing a step from occurring between the end plate 21 and the adhesive piece 22.

[0065] The end plate 21 is provided with a fold line 28 that is inclined toward the top plate 12 from the end of the punching portion main body 27b on the top plate 12 side toward the outside in the width direction X. This facilitates the formation of a step between the first portion 21a and the second portion 21b of the end plate 21.

[0066] Other embodiments and various modifications of the present invention will be described below, but in these descriptions, points that are not particularly mentioned are the same as those in the first embodiment. In the drawings referred to below, the same elements as those in the first embodiment are given the same reference numerals.

[0067] The first fold line 25a (first bent portion 25), the second fold line 26a (second bent portion 26), and the punched portion 27 may be configured as shown in FIGS.

[0068] 6 is configured as a slit of a predetermined width. Of this punched portion 27, the portion located between the first fold line 25a and the second fold line 26a constitutes a continuous portion 27a, and the portion extending from the continuous portion 27a to the end plate 21 constitutes a punched portion main body 27b. In this way, the punched portion 27 may be configured to penetrate the end plate 21.

[0069] 7, the punched portion 27 is configured by a cutting line similar to that of the first embodiment. In this punched portion 27, a cutting line 27e is provided on the center side of the end plate 21 in the width direction X with respect to the dividing portion 27c, instead of the breakage prevention portion 27d and the fold line 28 shown in FIG. 3B.

[0070] In the modified example shown in FIG. 8, the first fold line 25a and the second fold line 26a are spaced apart in the width direction X, and the fold line 28 is not provided. This modification also differs from the first embodiment in that the configuration of the connecting portion 27a connecting the first fold line 25a and the second fold line 26a is different. Specifically, the punched portion 27 is formed by a cut line, as in the first embodiment. The connecting portion 27a of the punched portion 27 is composed of a first portion 27f connecting to the first fold line 25a, a second portion 27g connecting to the second fold line 26a, and a third portion 27h connecting to the first portion 27f and the second portion 27g. The first portion 27f passes through the inner end of the first fold line 25a and extends from the bottom plate 11 to the end plate 21. The second portion 27g extends from the outer end of the second fold line 26a toward the end plate 21 and is connected to the punched portion main body 27b. The third portion 27h is provided at a distance from the bottom plate 11 on the opposite side of the second fold line 26a, and has one end connected to the first portion 27f and the other end connected to the second portion 27g.

[0071] 9 does not have the breakage prevention portion 27d and fold line 28 shown in FIG. 3B. This punched portion 27 is formed by a cutting line, as in the first embodiment. This punched portion 27 is provided with an extension portion 27i that is continuous with the continuous portion 27a and extends from the inner end of the first fold line 25a into the bottom plate 11.

[0072] In the modified example shown in Figure 10, the first fold line 25a and the second fold line 26a are spaced apart in the width direction X, and the breakage prevention portion 27d and the fold line 28 are not provided. The punched portion 27 is formed by a cutting line, as in the first embodiment. The continuous portion 27a of the punched portion 27 extends from the inner end of the first fold line 25a to the outer end of the second fold line 26a. The punched portion main body 27b (separating portion 27c) extends from the inner end of the first fold line 25a into the end plate 21.

[0073] In the modified example shown in FIG. 11, the first fold line 25a and the second fold line 26a are spaced apart in the width direction X, and the breakage prevention portion 27d and the fold line 28 are not provided. The punched portion 27 is formed by a cutting line, as in the first embodiment. The continuous portion 27a of the punched portion 27 extends from the inner end of the first fold line 25a to the outer end of the second fold line 26a. The punched portion main body 27b (separating portion 27c) extends from the outer end of the second fold line 26a into the end plate 21.

[0074] In the modified example shown in FIG. 12, the first fold line 25a and the second fold line 26a are spaced apart in the width direction X, and the breakage prevention portion 27d and the fold line 28 are not provided. The punched portion 27 is formed by a cutting line, as in the first embodiment. The continuous portion 27a of the punched portion 27 extends from the inner end of the first fold line 25a to the outer end of the second fold line 26a. The punched portion main body 27b (separating portion 27c) extends from the outer end of the second fold line 26a into the end plate 21. The punched portion 27 is also provided with an extension portion 27i that is continuous with the continuous portion 27a and extends from the inner end of the first fold line 25a into the bottom plate 11.

[0075] 6 to 12, similar to the first embodiment, a first bent portion 25, a second bent portion 26 spaced apart from the first bent portion 25 on the outer side in the length direction Y, and a punched portion 27 extending through the end plate 21 in the height direction Z are provided between the bottom plate 11 and the end plate 21. Therefore, similar to the first embodiment, the occurrence of a step caused by adhering the adhesive piece 22 to the outer surface of the end plate 21 can be suppressed, and the outer surface of the end plate 21 and the outer surface of the adhesive piece 22 can be arranged flush with each other. Therefore, the packaging box 10 can be manufactured with the designed outer dimensions.

[0076] (Second embodiment) The packaging box 10 of the second embodiment shown in Figure 13 differs from the first embodiment in that, instead of connecting the covering plate 23 shown in Figure 1 to the top plate 12, an inner flap 40 is connected to the upper end of the side plate 13A, and inner flaps 41 are connected to the upper ends of each of the pair of end plates 21, and a locking structure is provided on the top plate 12.

[0077] 13 and 14, the packaging box 10 includes a bottom plate 11, a top plate 12, side plates 13A and 13B, and a pair of end plates 21. The side plate 13A, like the side plate 13B, is made of a single cardboard sheet, which is different from the first embodiment. Similar to the first embodiment, adhesive pieces 22 are provided at both ends of the side plates 13A and 13B in the longitudinal direction Y.

[0078] An inner flap 40 that is folded so as to overlap the inner surface of the top plate 12 is connected to the side plate 13A via a folding portion 42. Furthermore, an inner flap 41 that is folded so as to overlap the inner surface of the top plate 12 is connected to each of the pair of end plates 21 via a folding portion 43. The folding lines 42a, 43a that make up the folding portions 42, 43 are both general-purpose creases.

[0079] A locking piece 44 is connected to both ends of the inner flap 40 in the longitudinal direction Y via a folding portion 45. The folding line 45a constituting the folding portion 45 is a general-purpose crease. A locking hole 46 is provided in the folding portion 43 between the end plate 21 and the inner flap 41 to lock the inserted locking piece 44.

[0080] A locking piece 49 is connected to the tip (on the side plate 13A side) of the top plate 12 connected to the side plate 13B via a zipper piece 48. A breaking line 50 consisting of a single zipper is provided between the top plate 12 and zipper piece 48 and between the zipper piece 48 and locking piece 49. A locking hole 51 for locking the inserted locking piece 49 is provided in the bent portion 16 between the bottom plate 11 and the side plate 13A.

[0081] A locking piece 53 is connected to both ends of the top plate 12 in the longitudinal direction Y via a breaking line 54 consisting of a one-sided zipper. A locking hole 55 is provided in the bent portion 43 between the end plate 21 and the inner flap 41 to lock the inserted locking piece 53.

[0082] An insertion piece 57 is punched out at the tip of the top plate 12, and an insertion hole 58 is provided in the inner flap 40 for inserting the insertion piece 57 to maintain the resealed state.

[0083] Next, an example of a method for manufacturing the packaging box 10 of the second embodiment will be described.

[0084] First, in the blank state shown in Fig. 14, the pair of end plates 21 are each bent relative to the bottom plate 11. As a result, similar to the first embodiment, a step is formed between the first portion 21a and the second portion 21b of the end plate 21. Next, the side plates 13A and 13B are each bent relative to the bottom plate 11, and then the adhesive pieces 22 are each bent relative to the side plates 13A and 13B. The adhesive pieces 22 are then attached to the outer surfaces of the first portions 21a of the end plates 21 with an adhesive.

[0085] Next, the flap 41 is folded relative to the end plate 21, and then the flap 40 is folded relative to the side plate 13A, and the locking piece 44 is inserted into the locking hole 46 and locked. This results in the sealing process state shown in Figure 15. In this sealing process state, the outer surface of the second portion 21b of the end plate 21 is located further outward in the longitudinal direction Y than the outer surface of the first portion 21a, and is located approximately flush with the outer surface of the adhesive piece 22.

[0086] Next, after storing the articles on the bottom plate 11, the top plate 12 is folded relative to the side plate 13B, and the locking pieces 53 are inserted and locked into the locking holes 55. Next, the zipper pieces 48 are folded relative to the top plate 12, and the locking pieces 49 folded relative to the zipper pieces 48 are inserted and locked into the locking holes 51. As a result, the top plate 12 is locked to the flaps 40, 41, and the sealed packaging box 10 shown in FIG. 13 is completed.

[0087] 13, in the sealed packaging box 10, there is almost no difference in level between the outer surface of the second portion 21b of the end plate 21 and the outer surface of the adhesive piece 22. In other words, the outer surface of the end plate 21 and the outer surface of the adhesive piece 22 can be arranged flush with each other, so the packaging box 10 can be manufactured to the designed external dimensions.

[0088] To open the sealed packaging box 10 shown in Fig. 13, the left end of the zipper piece 48 is grasped and pulled to the right in Fig. 13. This separates the zipper piece 48 along the breaking line 50. Next, the leading edge of the top panel 12 is grasped and the top panel 12 is pulled upward toward the side panel 13B. This breaks the ridge between the top panel 12 and the locking piece 53 along the breaking line 54, allowing the packaging box 10 to be opened as shown in Fig. 16.

[0089] As described above, in the packaging box 10 of the second embodiment, similar to the packaging box 10 of the first embodiment, a pair of first bent portions 25, a second bent portion 26 spaced apart from the first bent portion 25 on the outer side in the longitudinal direction Y, and a punched portion 27 extending through the end plate 21 along the height direction Z are provided between the bottom plate 11 and the pair of end plates 21. This creates a step in the end plate 21, and the adhesive piece 22 is attached to the first portion 21a corresponding to the first bent portion 25. Therefore, the step in the end plate 21 can absorb the thickness of the adhesive piece 22, thereby suppressing the generation of a step that would otherwise be caused by attaching the adhesive piece 22 to the outer surface of the end plate 21. This allows the outer surfaces of the end plate 21 and the adhesive piece 22 to be flush with each other. This allows the packaging box 10 to be manufactured with the designed external dimensions.

[0090] The present invention is not limited to the configurations of the above-described embodiment and modified examples, and various modifications are possible.

[0091] For example, the container may be a tray with an open top that does not have the top plate 12 and the inner flaps 40, 41 shown in the second embodiment.

[0092] The fold lines that make up the bend portion are not limited to general-purpose creases and lead creases consisting of general-purpose creases and cutting lines, and can be changed as needed as long as they are configured to be bend without breaking when an external force is applied.

[0093] The bottom plate 11 and the pair of side plates 13A, 13B, and the top plate 12 and the pair of side plates 13A, 13B may be connected via chamfered plates and have an octagonal shape when viewed from the longitudinal direction Y. In addition, the bottom plate 11 and the pair of end plates 21, and the top plate 12 and the pair of cover plates 23 may also be connected via chamfered plates and have an octagonal shape when viewed from the width direction X.

[0094] The material of the packaging box 10 is not limited to a paper corrugated cardboard sheet, but may be a resin corrugated cardboard sheet. Also, the material of the packaging box 10 is not limited to a corrugated cardboard sheet, but may be a single layer of cardboard or a resin sheet. [Explanation of symbols]

[0095] 10 Packaging box (container) 11 Bottom plate 12 Top plate 13A,13B side plate 14 Side panel body 15 passages 16 Bend section 16a folding line 17 Bend section 17a,17b folding line 18 General-purpose ruled lines 19 Cutting line 19a Protrusion 20 Lid wall 21 End plate 21a Part 1 21b Part 2 21c Continuous section 22 Adhesive piece 22a Tip 22b Chamfered part 23 Covering plate 24 Bend section 25 1st bend 25a 1st folding curve 26 2nd bend 26a 2nd fold curve 27 Punching section 27a Continuous section 27b Punching part body 27c Divided part 27d Break-stop 27e cutting line 27f Part 1 27g 2nd portion 27h 3rd part 27i extension part 28 fold line 29 Bend section 29a folding line 30 Bend section 31 Unbroken part 31a folding line 32 Breaking part 32a Break line 35 Unpacking structure 36 Operation section 36a Break line 37 Break Line 37a Break 37b Break 40 Inner flap 41 Inner flap 42 Bend part 42a folding line 43 Bend section 43a folding line 44 Locking piece 45 Bend section 45a folding line 46 Locking hole 48 zipper strips 49 Locking piece 50 Break Line 51 Locking hole 53 Locking piece 54 Break Line 55 Locking hole 57 Insert 58 Insertion hole X width direction (first direction) Y Length direction (second direction) Z height direction (third direction)

Claims

1. a bottom plate extending along a first direction and a second direction intersecting the first direction; a pair of side plates respectively connected to both ends of the bottom plate in the first direction and extending along the second direction and a third direction intersecting both the first direction and the second direction; a top plate connected to each end of the pair of side plates in the third direction and spaced apart from the bottom plate in the third direction; a pair of end plates connected to both ends of the bottom plate in the second direction and extending along the first direction and the third direction; a total of four adhesive pieces connected to both ends of the pair of side plates in the second direction and attached to the outer surfaces of the adjacent end plates; a cover plate connected to each end of the top plate in the second direction and attached to the end plate and the outer surface of each of the pair of attachment pieces; Equipped with Between the bottom plate and the pair of end plates, a pair of first bent portions provided on both sides in the first direction to correspond to the pair of adhesive pieces, and each extending in the first direction; a second bent portion provided on the outer side of the first bent portion in the second direction with a gap therebetween and extending in the first direction between the pair of first bent portions; a punched portion that is connected to at least one of the first bent portion and the second bent portion, penetrates the end plate, and extends in a direction away from the bottom plate along the third direction; A container is provided.

2. The container according to claim 1 , wherein the punched portion includes a continuous portion that is continuous with the first folded portion and the second folded portion.

3. 3. The container according to claim 1, wherein a distance from the bent portion between the side panel and the adhesive piece to the punched portion is equal to or greater than a length from the bent portion to a tip of the adhesive piece.

4. The container according to claim 1 , wherein the length of the punched portion in the third direction is equal to or greater than one-third of the width of the adhesive piece in the third direction.

5. The container according to any one of claims 1 to 4, wherein the end plate has a fold line that slopes toward the top plate as it moves from the end of the punched portion on the top plate side toward the outside in the first direction.

6. a bottom plate extending along a first direction and a second direction intersecting the first direction; a pair of side plates respectively connected to both ends of the bottom plate in the first direction and extending along the second direction and a third direction intersecting both the first direction and the second direction; a pair of end plates connected to both ends of the bottom plate in the second direction and extending along the first direction and the third direction; a total of four adhesive pieces connected to both ends of the pair of side plates in the second direction and attached to the outer surfaces of the adjacent end plates; Equipped with Between the bottom plate and the pair of end plates, a pair of first bent portions provided on both sides in the first direction to correspond to the pair of adhesive pieces, and each extending in the first direction; a second bent portion provided on the outer side of the first bent portion in the second direction with a gap therebetween and extending in the first direction between the pair of first bent portions; a punched portion that is connected to at least one of the first bent portion and the second bent portion, penetrates the end plate, and extends in a direction away from the bottom plate along the third direction; is provided, A container comprising a top plate that closes the ends of the pair of side plates and the pair of end plates in the third direction and is positioned at a distance from the bottom plate in the third direction.

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