How to fold the folding shipping box

Abstract

To be able to be folded into a compact shape suitable for transport, and to reduce transport cost.SOLUTION: A folding delivery box 1 includes: a top wall 20 continuously provided to an upper edge part of a trunk part 10; and a bottom wall 30 continuously provided to a lower edge part of the trunk part 10. At a central part in the left-to-right direction of a pair of front and back side walls 11, 12 respectively, folding regions 50a, 50b are formed including a plurality of side wall folding guide lines 51a, 51b extending in the vertical direction. Each of the folding regions 50a, 50b extends across a pair of front and back upper side flaps 21, 22 of the top wall 20 and a pair of front and back lower side flaps 31, 32 of the bottom wall 30 from the pair of front and back side walls 11, 12.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention , fold This relates to a folding method for a folding delivery box. [Background technology]

[0002] In recent years, cardboard shipping boxes have been widely used as shipping boxes for online shopping, etc., and various products are delivered in these boxes. Meanwhile, in services that purchase unwanted items, etc., a compactly folded shipping box is sent to the customer, who then assembles the shipping box to place the unwanted items in, and sends the box to the dealer.

[0003] A conventionally known delivery box that can be folded compactly is that disclosed in Patent Document 1. This delivery box has fold lines, and can be folded into a flat shape by folding along the fold lines. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-132230 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the shipping fee for a delivery box increases or decreases depending on the size of the delivery box (the sum of the width, depth, and height). For this reason, there has been a demand from customers for the delivery box to be folded as compactly as possible when being transported. However, as the volume of a shipping box increases, it becomes more difficult to fold it compactly.

[0006] The present invention solves the above-mentioned problems, and can be folded into a compact shape suitable for transportation, thereby reducing transportation costs. At that time To provide a folding method for a folding delivery box. [Means for solving the problem]

[0013] In order to solve the above problem, The folding method of the folding shipping box of the present invention includes the steps of: a top wall connected to an upper edge of the body and having a pair of front and rear upper flaps connected to the upper ends of the pair of front and rear side walls and a pair of left and right end flaps connected to the upper ends of the pair of left and right end walls; and a bottom wall connected to a lower edge of the body and having a pair of front and rear lower flaps connected to the lower ends of the pair of front and rear side walls and a pair of left and right lower flaps connected to the lower ends of the pair of left and right end walls, and A folding region is formed with a plurality of side wall folding guide lines extending therethrough, each of the folding regions extending from the pair of front and rear side walls across the pair of front and rear upper flaps and the pair of front and rear lower flaps, and end wall folding guide lines extending in the up and down direction are formed in the center of each of the pair of left and right end walls in the front and rear direction, and each of the end wall folding guide lines extends from the pair of left and right end walls across the pair of left and right upper end flaps and the pair of left and right lower end flaps. The method includes the steps of preparing a sheet body that will become a folding delivery box, folding the pair of front and rear lower flaps to the outside of each of the pair of front and rear side walls and folding the pair of left and right lower end flaps to the outside of each of the pair of left and right end walls, and folding the pair of front and rear upper flaps to the outside of the pair of front and rear side walls and raising one of the pair of left and right upper end flaps up toward one of the end walls and folding the other upper end flap to the outside of the other end wall. The folding method for the foldable delivery box includes a step of: valley-folding one of the end walls, the lower end flap folded back outward from one of the end walls, and the upper end flap standing up toward the top of one of the end walls along one of the end-wall folding guide lines; and valley-folding the other end wall, the lower end flap, and the upper end flap folded back outward from the other end wall along the other end-wall folding guide line, to form a folded body in which the end wall, the lower end flap, and the other upper end flap are stacked between the pair of front and rear side walls. The folding method for the foldable delivery box further includes a step of folding the folded body in half in the left-right direction along each folding region; and a step of inserting one of the upper end flaps inside the side wall. It is preferable that each of the folding regions of the folding delivery box is subjected to a corrugated processing in which the cardboard material is crushed in the thickness direction. By applying this type of corrugation processing, the folding area becomes easier to bend even when the material is cardboard, making the folding process easier. In addition, by applying the corrugation processing, each folding area can be folded reliably, so the shape retention after folding is excellent. Therefore, transportability is improved.

[0014] In the present invention, a folded body is formed by folding a pair of front and rear side walls, a pair of left and right end walls, and a plurality of flaps, and then this can be efficiently folded together (integrally) in each folding region, resulting in excellent foldability. [Effects of the Invention]

[0015] The present invention At the timeThe folding method of the folding shipping box allows it to be folded into a compact shape suitable for transportation, reducing transportation costs. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view showing a delivery box according to a first embodiment of the present invention. FIG. [Figure 2] 1 is a diagram showing a blank sheet for a delivery box according to a first embodiment of the present invention. FIG. [Figure 3A] 1A to 1C are diagrams illustrating a folding procedure for the delivery box according to the first embodiment of the present invention, and are plan views illustrating the state in which the delivery box is folded into a sheet. [Figure 3B] FIG. 2 is a perspective view showing the folding procedure of the delivery box according to the first embodiment of the present invention, showing the body portion in an unfolded state. [Figure 4A] FIG. 10 is a diagram showing the folding procedure of the delivery box according to the first embodiment of the present invention, and is a perspective view showing the process of folding back the flap on the bottom wall side. [Figure 4B] 1 is a diagram showing a folding procedure for the delivery box according to the first embodiment of the present invention, and is a perspective view showing the process of folding back the flap on the top wall side. FIG. [Figure 5A] 1 is a diagram showing a folding procedure for the delivery box according to the first embodiment of the present invention, and is a perspective view showing the state in which the bottom wall and top wall are folded back. FIG. [Figure 5B] 1A to 1C are perspective views showing the folding procedure of the delivery box according to the first embodiment of the present invention, illustrating the process of folding the left and right end walls. [Figure 6A] FIG. 1 is a perspective view showing a folding procedure for the delivery box according to the first embodiment of the present invention, in which the front and rear side walls are brought close to each other to form a folded body. [Figure 6B] 1A to 1C are perspective views showing a folding procedure for the delivery box according to the first embodiment of the present invention, illustrating the process of folding the folded body in half in the left-right direction. [Figure 7A] 1A to 1C are diagrams illustrating a folding procedure for the delivery box according to the first embodiment of the present invention, and are perspective views illustrating the folded body folded in half. [Figure 7B]1A and 1B are diagrams showing the folding procedure of the delivery box according to the first embodiment of the present invention, and are perspective views showing the process of inserting the upper end flap. [Figure 8] FIG. 2 is a perspective view showing a delivery box folded according to a folding procedure for a delivery box according to the first embodiment of the present invention. [Figure 9] FIG. 10 is a perspective view showing a delivery box according to a second embodiment of the present invention. [Figure 10] FIG. 10 is a diagram showing a blank sheet for a delivery box according to a second embodiment of the present invention. [Figure 11A] FIG. 10 is a diagram showing a folding procedure for a delivery box according to a second embodiment of the present invention, and is a plan view showing the state in which the delivery box is folded into a sheet. [Figure 11B] FIG. 10 is a perspective view showing the folding procedure of the delivery box according to the second embodiment of the present invention, with the body portion unfolded. [Figure 12A] FIG. 10 is a diagram showing the folding procedure of the delivery box according to the second embodiment of the present invention, and is a perspective view showing the process of folding back the flap on the top wall side. [Figure 12B] FIG. 10 is a diagram showing the folding procedure of the delivery box according to the second embodiment of the present invention, and is a perspective view showing the process of folding back the flap on the bottom wall side. [Figure 13A] 10 is a diagram showing the folding procedure of the delivery box according to the second embodiment of the present invention, and is a perspective view showing the process of folding the front and rear side walls. FIG. [Figure 13B] FIG. 10 is a diagram showing the folding procedure of the delivery box according to the second embodiment of the present invention, and is a perspective view showing the process of further folding the folded front and rear side walls in the left-right direction. [Figure 14A] 10 is a diagram showing the folding procedure of the delivery box according to the second embodiment of the present invention, and is a perspective view showing the process of inserting the upper end flap and the lower end flap. FIG. [Figure 14B] FIG. 10 is a perspective view showing a delivery box folded according to a folding procedure for a delivery box according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the front, back, left, right, top and bottom directions are based on the directions shown in Figures 1 and 9. In the description, the same elements are designated by the same reference numerals, and duplicated descriptions will be omitted.

[0018] (First embodiment) As shown in Figure 1, the delivery box 1 of this embodiment is an A-type box, and is a rectangular parallelepiped whose length in the left-right direction is greater than its length in the front-to-back direction. The delivery box 1 comprises a cylindrical body 10, a top wall 20 formed at the upper opening of the body 10, and a bottom wall 30 formed at the lower opening. The top wall 20 serves as a lid that closes the upper opening, and the bottom wall 30 serves as a lid that closes the lower opening. The delivery box 1 of this embodiment can be folded into a compact folded shape (see Figure 8), as will be described later.

[0019] As shown in Figure 2, the delivery box 1 is formed by mountain or valley folding a blank sheet S cut out from a single sheet of cardboard at each crease. The blank sheet S shown in Figure 2 is arranged so that the inner side is visible. Each crease (fold line) on the blank sheet S is a linear groove (pressed crease) formed by pressing the inner surface of the blank sheet S. Note that notches (half-cut lines, etc.) may be formed on the crease lines, which makes it easier to fold the blank sheet S at the crease lines.

[0020] As shown in Figure 1, the body 10 has a rectangular cylindrical shape when the delivery box 1 is in its normal use state, and has a pair of front and rear side walls 11, 12 and a pair of left and right end walls 13, 14. When the delivery box 1 is in its normal use state, the internal space surrounded by the front side wall 11, rear side wall 12, left end wall 13, and right end wall 14 can accommodate items (not shown).

[0021] The front wall 11 and the rear wall 12 are rectangular and have the same dimensions, and are spaced apart in the front-to-back direction. The left end wall 13 and the right end wall 14 are rectangular and have the same dimensions, and are spaced apart in the left-to-right direction. The dimensions of the front wall 11, the rear wall 12, the left end wall 13, and the right end wall 14 are set appropriately depending on the size of the contents to be stored.

[0022] As shown in Figure 2, the body 10 has a horizontally elongated rectangular shape when unfolded. A left end wall 13 is connected to the left edge of the front wall 11 via a crease. A right end wall 14 is formed on the right edge of the front wall 11 via a crease. A rear wall 12 is connected to the rear edge of the left end wall 13 via a crease. A strip-shaped joining piece 15 is connected to the right edge of the rear wall 12 via a crease. The joining piece 15 is joined to the inner rear surface of the right end wall 14 by an adhesive such as hot melt.

[0023] Then, when the blank sheet S (see FIG. 2) is folded along each of the lines, the front side wall 11, the rear side wall 12, the left end wall 13, and the right end wall 14 form a rectangular cylindrical body portion 10.

[0024] 1, the top wall 20 is formed by a front upper flap 21 and a rear upper flap 22 connected to the upper edges of the front wall 11 and the rear wall 12, respectively, and a left upper end flap 23 and an right upper end flap 24 connected to the upper edges of the left end wall 13 and the right end wall 14, respectively. The front upper flap 21, the rear upper flap 22, and the right upper end flap 24 are all rectangular flat plates, and the left upper end flap 23 is a substantially trapezoidal flat plate. The tips of the front upper flap 21 and the rear upper flap 22 abut against each other at the center of the top wall 20 in the fore-and-aft direction, as shown in FIG.

[0025] The bottom wall 30 is formed by a front lower flap 31 and a rear lower flap 32 connected to the lower edges of the front wall 11 and the rear wall 12, respectively, and a left lower end flap 33 and a right lower end flap 34 connected to the lower edges of the left end wall 13 and the right end wall 14, respectively. The left lower end flap 33 is superimposed on the underside of the left portion of the rear lower flap 32. The right lower end flap 34 is superimposed on the underside of the right portion of the rear lower flap 32.

[0026] The front lower flap 31 is formed in a generally trapezoidal shape with a width that narrows in the left-right direction from the front end to the rear end. The front lower flap 31 overlaps the undersides of the left lower end flap 33 and the right lower end flap 34, respectively, and the rear end is inserted into the upper surface of the center of the rear lower flap 32. The bottom wall 30 is closed by combining the front lower flap 31, the rear lower flap 32, the left lower end flap 33, and the right lower end flap 34 using an American lock system. Because the bottom wall 30 of the delivery box 1 of this embodiment is closed using the American lock system, the bottom wall 30 can be assembled easily and reliably, and the strength of the bottom wall 30 can be sufficiently increased without using adhesive tape or glue.

[0027] As shown in FIG. 2, a front folding region 50a that functions as a folding region is formed on the inner surface of the front wall 11. The front folding region 50a extends in a strip-like shape in the vertical direction in the center of the left-right direction of the front wall 11. The front folding region 50a is subjected to a corrugated processing in which the cardboard is crushed in the thickness direction. Three front folding guide lines 51a that function as side wall folding guide lines are formed in the front folding region 50a. The front folding guide lines 51a are three linear grooves (creases) that are aligned vertically at intervals along the front folding region 50a.

[0028] Each front folding region 50a is formed across the upper edge of the front wall 11 to the front upper flap 21, and is also formed across the lower edge of the front wall 11 to the front lower flap 31. Similarly, each front folding guide line 51a is also formed across the front wall 11 to the front upper flap 21 and the front lower flap 31.

[0029] A rear folding region 50b, which functions as a folding region, is also formed on the inner surface of the rear wall 12. The rear folding region 50b extends in a strip shape in the vertical direction in the center of the left-right direction of the rear wall 12. The rear folding region 50b is subjected to a corrugated processing in which the cardboard is crushed in the thickness direction. Three rear folding guide lines 51b, which function as side wall folding guide lines, are formed in the rear folding region 50b. Each rear folding guide line 51b is three linear grooves (creases) that are aligned vertically at intervals along the rear folding region 50b.

[0030] The rear folding region 50b is formed across the upper edge of the rear wall 12 and the rear upper flap 22, and is also formed across the lower edge of the rear wall 12 and the rear lower flap 32. Similarly, each rear folding guide line 51b is also formed across the rear wall 12 and the rear upper flap 22 and the rear lower flap 32. The front folding guide line 51a and the rear folding guide line 51b may be formed by one or two linear grooves (creases) on the top and bottom, or by four or more linear grooves (creases) on the top and bottom. Furthermore, when the blank sheet S is thick, for example, slits (half-cut lines, etc.) may be formed along the grooves. This makes it easier to fold the sheet along the front folding guide line 51a and the rear folding guide line 51b.

[0031] Two left-side folding guide lines 52a are formed on the inner surface of the left end wall 13. The two left-side folding guide lines 52a extend in the up-down direction in the center in the front-to-rear direction of the left end wall 13. Each left-side folding guide line 52a is a linear groove (crease) that is continuous in the up-down direction.

[0032] The two left-side bending guide lines 52a are formed across the upper edge of the left end wall 13 and extending to the upper left end flap 23, and are also formed across the lower edge of the left end wall 13 and extending to the lower left end flap 33.

[0033] Two upper left end fold guide lines 25 are formed on the upper left end flap 23 so as to be perpendicular to the two left side fold guide lines 52a. Each upper left end fold guide line 25 is parallel to the upper edge of the left end wall 13 and extends in the front-rear direction at approximately the center of the upper left end flap 23 in the left-right direction.

[0034] Similarly, two right-side folding guide lines 52b are formed on the inner surface of the right end wall 14. The two right-side folding guide lines 52b extend in the up-down direction in the center in the front-to-rear direction of the right end wall 14. Each right-side folding guide line 52b is a linear groove (crease) that is continuous in the up-down direction.

[0035] Each right bending guide line 52b is formed across the upper edge of the right end wall 14 to the upper right end flap 24, and is also formed across the lower edge of the right end wall 14 to the lower right end flap 34.

[0036] In normal use, when the delivery box 1 of this embodiment is used to transport or store contents, the top wall 20 is closed, similar to a typical A-type cardboard box. When opening the delivery box 1, the front upper flap 21, rear upper flap 22, upper left flap 23, and upper right flap 24 of the top wall 20 are opened, similar to a typical A-type cardboard box.

[0037] Next, the procedure for compactly folding the blank sheet S will be described with reference to Figures 3A to 8. First, the joining piece 15 of the rear wall 12 of the blank sheet S is joined to the rear inner surface of the right end wall 14 with an adhesive such as hot melt, forming a flattened folded sheet body as shown in Figure 3A. The sheet body has a more compact shape than the unfolded blank sheet S, making it suitable for storage in warehouses, etc.

[0038] To fold the sheet body of Fig. 3A more compactly, first, the body portion 10 is opened from the sheet body state into a rectangular tube shape as shown in Fig. 3B. Then, as shown in Fig. 4A, the front lower flap 31 is folded back to the outside of the front wall 11, and the rear lower flap 32 is folded back to the outside of the rear wall 12. Furthermore, the left lower end flap 33 is folded back to the outside of the left end wall 13, and the right lower end flap 34 is folded back to the outside of the right end wall 14.

[0039] Thereafter, as shown in FIG. 4B , the front upper flap 21 is folded back to the outside of the front wall 11, and the rear upper flap 22 is folded back to the outside of the rear wall 12. Also, the upper right edge flap 24 is folded back to the outside of the right edge wall 14. As a result, as shown in FIG. 5A , on the outer surface of the front wall 11, the lower part of the front upper flap 21 overlaps the upper part of the front lower flap 31. Also, on the outer surface of the rear wall 12, the lower part of the rear upper flap 22 overlaps the upper part of the rear lower flap 32. Also, on the outer surface of the right edge wall 14, the lower part of the upper right edge flap 24 overlaps the upper part of the lower right edge flap 34. The upper left edge flap 23 is left standing on the left edge wall 13.

[0040] Next, as shown in Fig. 5B, the left end wall 13 and the lower left end flap 33 (not shown) are valley-folded together along the left folding guide line 52a, and the upper left end flap 23 that has risen up is valley-folded along the left folding guide line 52a. In addition, the right end wall 14, the lower right end flap 34, and the upper right end flap 24 are valley-folded together along the right folding guide line 52b. As a result, as shown in Fig. 6A, a folded body 60 is formed in which the left end wall 13 and the lower left end flap 33 (not shown), which are bent into a V shape, are overlapped between the front wall 11 and the rear wall 12, and the right end wall 14, which is bent into a V shape, and the lower right end flap 34 and the upper right end flap 24 overlapping therewith are overlapped between the front wall 11 and the rear wall 12.

[0041] Thereafter, as shown in FIG. 6B, the center of the front wall 11 and the center of the rear wall 12 of the folded body 60 are brought into contact with each other, and the folded body 60 is valley-folded at the front folding region 50a (front folding guide line 51a) and folded in half in the left-right direction, resulting in a compact shape as shown in FIG. 7A.

[0042] 7B, the upper left flap 23 is folded forward along the two upper left folding guide lines 25, and its leading edge is inserted inside the rear wall 12. This insertion prevents the folded body 60, which has been folded in half, from returning to its flat state before folding, and allows the compact folded shape shown in FIG.

[0043] The delivery box 1 of this embodiment described above includes a front folding region 50a with multiple front folding guide lines 51a and a rear folding region 50b with multiple rear folding guide lines 51b, making the front folding region 50a and the rear folding region 50b more flexible and easier to bend than other regions. This allows the front folding region 50a and the rear folding region 50b to be used to further fold the folded body 60, in which multiple cardboard boxes are folded over, in half. This allows the box to be folded into a compact shape suitable for delivery by mail or courier, reducing transportation costs.

[0044] Furthermore, the front folding region 50a and the rear folding region 50b are subjected to a stepped processing. This makes the front folding region 50a and the rear folding region 50b easier to bend, facilitating the folding process. Furthermore, the stepped processing allows the bag to be folded reliably at each folding region, resulting in excellent shape retention after folding. This improves transportability.

[0045] Furthermore, according to the folding method of this embodiment, the folded body 60 is formed by folding the front wall 11, the rear wall 12, the left end wall 13, the right end wall 14, and the multiple flaps connected to these, and then this can be folded together (integrally) efficiently using the front folding region 50a and the rear folding region 50b, resulting in excellent foldability.

[0046] (Second embodiment) Next, a folding delivery box according to a second embodiment of the present invention will be described with reference to Figures 9 to 14B. The delivery box 1A of this embodiment differs from the delivery box 1 of the first embodiment in that two front folding guide lines 55a are formed across the front wall 11 and the front upper flap 21 and front lower flap 31 continuing therefrom, and two rear folding guide lines 55b are formed across the rear wall 12 and the rear upper flap 22 and rear lower flap 32 continuing therefrom. In other words, no folding guide lines are formed on the left end wall 13 and the upper-left end flap 23 and lower-left end flap 33 continuing therefrom, or on the right end wall 14 and the upper-right end flap 24 and lower-right end flap 34 continuing therefrom.

[0047] 9 and 10, each front folding guide line 55a functions as a side wall folding guide line for folding the front wall 11. Each front folding guide line 55a extends in the up-down direction in the center in the left-right direction of the front wall 11. Each front folding guide line 55a is three linear grooves (creases) formed at intervals in the up-down direction of the front wall 11. Each front folding guide line 55a is formed across the upper edge of the front wall 11 and extending to the front upper flap 21, and is also formed across the lower edge of the front wall 11 and extending to the front lower flap 31.

[0048] Each rear folding guide line 55b functions as a side wall folding guide line for folding the rear wall 12. Each rear folding guide line 55b extends in the up-down direction in the center in the left-right direction of the rear wall 12. Each rear folding guide line 55b is three linear grooves (creases) formed at intervals in the up-down direction of the rear wall 12. Each rear folding guide line 55b is formed across the upper edge of the rear wall 12 and extending to the rear upper flap 22, and is also formed across the lower edge of the rear wall 12 and extending to the rear lower flap 32.

[0049] The front folding guide line 55a and the rear folding guide line 55b may be formed by one or two linear grooves (creases) on the top and bottom, or by four or more linear grooves (creases) on the top and bottom. Furthermore, when the blank sheet S1 is thick, cuts (half-cut lines, etc.) may be formed along the grooves. This makes it easier to fold the sheet along the front folding guide line 55a and the rear folding guide line 55b.

[0050] Two lower-left end folding guide lines 35 are formed on the lower-left end flap 33 connected to the left end wall 13. Each lower-left end folding guide line 35 is parallel to the lower edge of the left end wall 13 and extends in the front-rear direction at approximately the center of the lower-left end flap 33 in the left-right direction.

[0051] In normal use, when the delivery box 1A of this embodiment is used to transport or store contents, the top wall 20 is closed, just like a typical A-type cardboard box. When opening the delivery box 1, the front upper flap 21, rear upper flap 22, upper left flap 23, and upper right flap 24 of the top wall 20 are opened, just like a typical A-type cardboard box.

[0052] Next, the procedure for compactly folding the blank sheet S1 will be described with reference to Figures 11A to 14B. First, the joining piece 15 of the rear wall 12 of the blank sheet S is joined to the rear inner surface of the right end wall 14 with an adhesive such as hot melt, forming a flattened folded sheet body as shown in Figure 11A. The sheet body has a more compact shape than the unfolded blank sheet S, making it suitable for storage in warehouses, etc.

[0053] To fold the sheet body of Fig. 11A more compactly, first, the body portion 10 is opened from the sheet body state into a rectangular tube shape as shown in Fig. 11B. Then, as shown in Fig. 12A, the front upper flap 21 is folded back inside the front wall 11, and the rear upper flap 22 is folded back inside the rear wall 12. In addition, the upper right end flap 24 is folded back inside the right end wall 14. The upper left end flap 23 is left standing on the left end wall 13.

[0054] Thereafter, as shown in FIG. 12B, the front lower flap 31 is folded back inside the front wall 11, and the rear lower flap 32 is folded back inside the rear wall 12. In addition, the right lower end flap 34 is folded back inside the right end wall 14. As a result, as shown in FIG. 13A, the front upper flap 21 and the front lower flap 31 are arranged one above the other on the inner surface of the front wall 11. In addition, the rear upper flap 22 and the rear lower flap 32 are arranged one above the other on the inner surface of the rear wall 12. The left lower end flap 33 is left hanging below the left end wall 13.

[0055] 13B, the front wall 11, the front upper flap 21, and the front lower flap 31 are valley-folded together along the front folding guide line 55a, and the rear wall 12, the rear upper flap 22, and the rear lower flap 32 are valley-folded together along the rear folding guide line 55b. Then, the front folding guide lines 55a and the rear folding guide lines 55b are arranged so as to overlap alternately in the left-right direction, and the right end wall 14 is moved toward the left end wall 13. This forms a folded body 70 that is folded flat in the left-right direction.

[0056] 14A, the upper-left end flap 23 is valley-folded to the right along the two upper-left end fold guide lines 25, and its leading edge is inserted from above the right end wall 14 into the inner surface of the right end wall 14. The lower-left end flap 33 is also valley-folded to the right along the two lower-left end fold guide lines 35, and its leading edge is inserted from below the right end wall 14 into the inner surface of the right end wall 14. These insertions prevent the folded body 70, which has been flattened in the left-right direction, from returning to its pre-folded state, and the compact folded shape shown in FIG. 14B can be maintained.

[0057] The delivery box 1A of this embodiment described above has two front folding guide lines 55a and two rear folding guide lines 55b, and the areas where these lines are formed are more flexible and easier to bend than other areas. This allows the front folding guide lines 55a and rear folding guide lines 55b to be used to suitably fold the folded body 70, which is made up of multiple overlapping cardboard boxes. This allows the box to be folded into a compact shape suitable for transportation, reducing transportation costs.

[0058] In this embodiment, too, step-flattening may be performed along the front bending guide line 55a and the rear bending guide line 55b.

[0059] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be modified as appropriate within the scope of the invention. For example, in the first embodiment, step flattening was applied to both the front folding region 50a and the rear folding region 50b, but this is not limited to this, and step flattening may be applied to either region, or step flattening may not be applied to either region.

[0060] In addition, in each of the above-described embodiments, the bottom wall 30 is closed by an American locking system, but this is not limitative and various systems and configurations can be adopted.

[0061] Furthermore, the front bending guide lines 51a, 55a and the rear bending guide lines 51b, 55b may be formed as a single continuous bending guide line without any gaps in the up-down direction.

[0062] In addition, in the first embodiment, the left upper end flap 23 is provided with a left upper end fold guide line 25, and the left upper end flap 23 is used as an insertion piece, but this is not limited to this, and the right upper end flap 24 may be provided with a right upper end fold guide line, and the right upper end flap 24 may be used as an insertion piece. In addition, in the second embodiment, the upper left end flap 23 is provided with an upper left end fold guide line 25, and the lower left end flap 33 is provided with a lower left end fold guide line 35, and these are configured to be used as insertion pieces, but this is not limited to this, and it is also possible to provide the upper right end flap 24 with an upper right end fold guide line, and the lower right end flap 34 with a lower left end fold guide line, and these can be configured to be used as insertion pieces.

[0063] Although the delivery box 1 in the above embodiment is made of corrugated cardboard, the delivery box may also be made of various known paperboards. [Explanation of symbols]

[0064] 1,1A shipping box 10. Torso 11 Front side wall 11 Side wall 12 Rear wall 13 End Wall 13 Left end wall 14 Right end wall 15 Joint piece 20 Top Wall 21 Front upper flap (upper flap) 22 Rear upper flap (upper flap) 23 Upper left flap (upper flap) 24 Right upper flap (top flap) 30 Bottom Wall 31 Front lower flap (lower flap) 32 Rear lower flap (lower flap) 33 Lower left flap (lower flap) 34 Right bottom flap (bottom flap) 50a Front bending area (bending area) 50b Rear bending area (bending area) 51a Front bend guide line (side wall bend guide line) 51b Rear bending guide line (side wall bending guide line) 52a Left side bend guide line (end wall bend guide line) 52b Right side bend guide line (end wall bend guide line) 55a Front bend guide line (side wall bend guide line) 55b Rear bending guide line (side wall bending guide line) 60 Folding body S, S1 Blank Sheet

Claims

1. A body portion consisting of a pair of front and rear side walls and a pair of left and right end walls; a top wall connected to an upper edge of the body portion and including a pair of front and rear upper flaps connected to upper ends of the pair of front and rear side walls, and a pair of left and right upper end flaps connected to upper ends of the pair of left and right end walls; a bottom wall connected to a lower edge of the body portion and having a pair of front and rear lower flaps connected to lower ends of the pair of front and rear side walls, and a pair of left and right lower end flaps connected to lower ends of the pair of left and right end walls, A folding region having a plurality of side wall folding guide lines extending in the up-down direction is formed in the center of each of the pair of front and rear side walls in the left-right direction, The folding regions extend from the pair of front and rear side walls to the pair of front and rear upper flaps and the pair of front and rear lower flaps, respectively; An end wall bending guide line extending in the up-down direction is formed in the center of each of the pair of left and right end walls in the front-rear direction, The end wall folding guide lines extend from the pair of left and right end walls to the pair of left and right upper end flaps and the pair of left and right lower end flaps, respectively. preparing a sheet body that will become the folding delivery box; a step of folding back the pair of front and rear lower flaps to the outside of each of the pair of front and rear side walls, and folding back the pair of left and right lower end flaps to the outside of each of the pair of left and right end walls; a step of folding back the pair of front and rear upper flaps to the outside of the pair of front and rear side walls, raising one of the pair of left and right upper end flaps toward one of the end walls, and folding back the other upper end flap to the outside of the other end wall; a step of forming a folded body in which the end wall, the lower end flap folded back to the outside of the one end wall, and the upper end flap standing up toward the top of the one end wall are each valley-folded along one of the end wall folding guide lines, and also valley-folding the other end wall and the lower end flap and the upper end flap folded back to the outside of the other end wall along the other end wall folding guide line, thereby overlapping the end wall, the lower end flap, and the other upper end flap between the pair of front and rear side walls; folding the folded-up body in half in the left-right direction at each of the folding regions; and inserting one of the top flaps inside the side wall.

2. 2. The folding method for a folding delivery box according to claim 1, wherein each of the folding regions is subjected to a corrugation process in which the corrugated cardboard material is crushed in the thickness direction.

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