Packing box

Abstract

To provide a packaging box which can increase drainage efficiency while keeping the strength of a bottom plate.SOLUTION: A packaging box 1A includes a box body 50 having a cylindrical body part 10 having front and rear end walls 11 and 11 and right and left side walls 12 and 12, and a bottom plate 20 provided on an opening on a lower side of the body part 10, wherein a hole part 60 is formed in a corner part 51 on a lower side of the box body 50. A recessed part 25 formed by crushing is formed on the edge part of the inner surface of the bottom plate 20, and the recessed part 25 extends along the edge part of the bottom plate 20 from the hole part 60.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] When food items such as vegetables and fruits are placed in a cardboard packaging box, water generated from the food items and ice packs may accumulate on the inner surface of the bottom plate, causing the water to penetrate the bottom plate. Therefore, some conventional packaging boxes have holes formed in the lower corners of the box body and creases formed on the inner surface of the bottom plate that extend from the holes toward the center of the bottom plate (see, for example, Patent Document 1). With this configuration, water on the inner surface of the bottom plate flows along the creases toward the holes, and is drained to the outside through the holes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3236097 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional packaging box described above, the bottom plate is easily bent at the creases, and is therefore easily deformed by the weight of the contents. Furthermore, in order to improve drainage efficiency in the conventional packaging box described above, it is necessary to form a large number of creases on the inner surface of the bottom plate. As such, the conventional packaging box described above has the problem of reducing the strength of the bottom plate.

[0005] SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a packaging box that can improve drainage efficiency while maintaining the strength of the bottom plate. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a packaging box comprising a box body having a cylindrical body portion with front and rear end walls and left and right side walls, and a bottom plate provided at an opening on the lower side of the body, with holes formed in the lower corners of the box body.A recess formed by crushing is formed on the edge of the inner surface of the bottom plate, and the recess extends from the hole along the edge of the bottom plate. In a direction intersecting the extension direction of the recessed portion, the upper surface of the recessed portion is inclined so that the outer side is lower than the center side of the bottom plate.

[0007] In the packaging box of the present invention, if the bottom plate is tilted during transportation, water accumulated on the inner surface of the bottom plate flows into the recess. The water flows inside the recess toward the hole and is drained to the outside through the hole. Furthermore, in the packaging box of the present invention, the drainage efficiency is improved by the recesses formed by crushing the inner edge of the bottom plate, so that the strength of the bottom plate can be maintained.

[0008] The above-mentioned packaging box So, The upper surface of the recessed portion is inclined so that the outer side is lower than the center side of the bottom plate. Because Water is less likely to remain in the recess.

[0009] In the packaging box described above, the bottom plate may include an inner flap connected to the lower edge of the end wall and an outer flap connected to the lower edge of the side wall, and the outer flap may be overlapped on the outer surface of the inner flap. In this case, by forming the recesses on at least the left and right edges of the inner flap, it is possible to improve drainage efficiency in a packaging box having a bottom plate formed by overlapping the inner flap and the outer flap. [Effects of the Invention]

[0010] In the packaging box of the present invention, the recess formed by crushing the inner edge of the bottom plate makes it easier for water inside the box to drain to the outside through the holes in the box, thereby improving drainage efficiency while maintaining the strength of the bottom plate. [Brief explanation of the drawings]

[0011] [Figure 1]1 is a perspective view of a packaging box according to a first embodiment of the present invention, viewed from the front lower left. FIG. [Figure 2] 1 is a diagram showing a blank sheet for a packaging box according to a first embodiment of the present invention. FIG. [Figure 3] 3 is a cross-sectional view taken along line III-III in FIG. 1, showing the packaging box according to the first embodiment of the present invention. FIG. [Figure 4] 1 is an explanatory diagram showing an embodiment in which recesses are formed on the left and right edge portions of the inner flap of the packaging box according to the first embodiment of the present invention. FIG. [Figure 5] FIG. 10 is a diagram showing a blank sheet for a packaging box according to a second embodiment of the present invention. [Figure 6] FIG. 10 is a cross-sectional view showing the bottom plate of a packaging box according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] 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 description of each embodiment, the same components are denoted by the same reference numerals, and duplicated descriptions will be omitted. In the following description, the front, rear, left and right directions are set for the convenience of describing the packaging box of this embodiment, and do not limit the configuration or usage state of the packaging box.

[0013] [First embodiment] 1, the packaging box 1A of the first embodiment includes a box body 50 having a rectangular cylindrical body 10, a bottom plate 20 closing the opening at the bottom of the body 10, and a top plate 30 closing the opening at the top of the body 10. The packaging box 1A of the first embodiment is an A-type cardboard box.

[0014] The packaging box 1A of the first embodiment is formed by mountain-folding or valley-folding a blank sheet S1 cut out from a cardboard sheet at each fold line, as shown in Fig. 2. The blank sheet S1 shown in Fig. 2 is arranged so that the inner side is visible.

[0015] The fold lines of the blank sheet S1 are creases (pressed creases) formed by linearly pressing the surface of the blank sheet S1. Note that the fold lines may be formed with intermittent notches, which makes it easier to fold the blank sheet S1 at the fold lines. Alternatively, the folded line may be formed by forming a half-cut slit only on the surface of the sheet or by forming an intermittent slit that penetrates the sheet.

[0016] As shown in Figure 1, the body 10 has a pair of front and rear end walls 11, 11 and a pair of left and right side walls 12, 12. The end wall 11 and the side wall 12 are formed in a rectangular shape. The end wall 11 and the side wall 12 are connected via a folding line. In this embodiment, a joining piece 13 connected to the rear edge of the left side wall 12 is attached to the inner surface of the rear end wall 11, thereby forming the cylindrical body 10. Rectangular openings are formed on the top and bottom surfaces of the body 10.

[0017] The bottom plate 20 has a pair of front and rear inner flaps 21, 21 connected to the front and rear end walls 11, 11, respectively, and a pair of left and right outer flaps 22, 22 connected to the left and right side walls 12, 12, respectively.

[0018] The inner flaps 21 are connected to the lower edge of the end wall 11 via a fold line. The front inner flap 21 covers the front part of the opening on the lower side of the body 10, and the rear inner flap 21 covers the rear part of the opening on the lower side of the body 10. The front and rear inner flaps 21, 21 are arranged with a gap in the front-to-rear direction.

[0019] The outer flap 22 is connected to the lower edge of the side wall 12 via a fold line. The front portion of the outer flap 22 is overlapped with the outer surface (lower surface) of the front inner flap 21, and the rear portion of the outer flap 22 is overlapped with the outer surface (lower surface) of the rear inner flap 21.

[0020] The left outer flap 22 closes the left half of the opening at the bottom of the body 10, and the right outer flap 22 closes the right half of the opening at the bottom of the body 10. The leading edge portions of the left and right outer flaps 22, 22 are butted against each other at the center of the upper opening of the body portion 10 in the left-right direction. The tips of the outer flaps 22 are connected by attaching adhesive tape (not shown) to the outer surfaces of the tip edges of the outer flaps 22. In this manner, the bottom plate 20 is closed, and the opening on the lower side of the body 10 is blocked by the bottom plate 20.

[0021] The top plate 30 is configured symmetrically with the bottom plate 20, and has an inner flap 31 connected to the upper edge of the end wall 11 and an outer flap 32 connected to the upper edge of the side wall 12, with the outer flap 32 superimposed on the outer surface (top surface) of the inner flap 31.

[0022] In this embodiment, holes 60 are formed in the lower corners 51 of the box body 50. In this embodiment, holes 60 are formed in three corners 51 of the box body 50: the left front, right front, and right rear. Each of the left front, right front, and right rear corners 51 is formed by an end wall 11, a side wall 12, an inner flap 21, and an outer flap 22. The holes 60 penetrate the corners 51 of the box body 50.

[0023] The hole portion 60 is formed in the blank sheet S1 shown in Figure 2 at a position where the fold line between the end wall 11 and the side wall 12, the fold line between the end wall 11 and the inner flap 21, and the fold line between the side wall 12 and the outer flap 22 intersect. The hole 60 is formed in a substantially circular shape in the blank sheet S1. In this embodiment, the hole 60 is formed in parts in the end wall 11, the side wall 12, the inner flap 21, and the outer flap 22. In other words, the end wall 11, the side wall 12, the inner flap 21, and the outer flap 22 each have an area corresponding to approximately 1 / 4 of the edge of the hole 60. As shown in Figure 1, when the box body 50 is assembled, the edges of the hole 60 in the end wall 11, side wall 12, inner flap 21 and outer flap 22 are connected to form the hole 60 in the corner 51 of the box body 50.

[0024] As shown in FIG. 3, the inner flap 21 of the packaging box 1A of the first embodiment has a recessed portion 25 formed by crushing. The recesses 25 are formed on the inner surface of the inner flap 21 at the edge on the end wall 11 side and at the left and right edge portions. The recesses 25 extend in a strip shape from the hole 60 along the edge portions of the inner flap 21. As shown in FIG. 4, the recessed portion 25 is a portion formed by pressing a sponge-like mold F against the inner surface of the inner flap 21 in the manufacturing process of the blank sheet S1 to crush and recess the inner surface side of the inner flap 21. The upper surface of the recessed portion 25 in the first embodiment is inclined so that the outer side is lower than the center side of the inner flap 21. In this manner, the surface of the formwork F is formed so that the upper surface of the recessed portion 25 is inclined.

[0025] In the packaging box 1A of the first embodiment, the outer flap 22 also has a recessed portion 25 formed by crushing. 2, a band-shaped recess 25 is formed in the edge of the outer flap 22 on the side of the end wall 11. The upper surface of the recess 25 of the outer flap 22 is also inclined so that the outer side of the outer flap 22 is lower than the center side.

[0026] When the inner flap 21 and the outer flap 22 are folded from the blank sheet S1 of the first embodiment and the bottom plate 20 is assembled as shown in Fig. 3, band-shaped recesses 25 are formed on the front, rear, left, and right edges of the inner surface of the bottom plate 20. Two recesses 25 extend from each hole 60.

[0027] In the packaging box 1A described above, water generated from food items and ice packs stored in the box body 50 shown in Fig. 3 may accumulate on the inner surface of the bottom plate 20. If the bottom plate 20 is tilted during transportation in this state, the water on the inner surface of the bottom plate 20 flows into the recessed portion 25. The water flows inside the recessed portion 25 toward the hole 60 and is drained to the outside through the hole 60. At this time, the upper surface of the recessed portion 25 is inclined so that the outer side is lower than the center side of the bottom plate 20, and water is less likely to remain in the recessed portion 25. In the packaging box 1A of the first embodiment, the recessed portion 25 formed by crushing the inner edge of the bottom plate 20 makes it easier for water inside the box body 50 to drain to the outside through the hole portion 60 of the box body 50, thereby improving drainage efficiency while maintaining the strength of the bottom plate 20.

[0028] Although the first embodiment of the present invention has been described above, the present invention is not limited to the first embodiment and can be modified as appropriate within the scope of the invention. In the packaging box 1A of this embodiment, as shown in Fig. 4, the upper surface of the recessed portion 25 is inclined so that the outer side is lower than the center side of the bottom plate 20, but the shape, width, and depth of the recessed portion 25 are not limited. For example, As a reference example of the present invention, The upper surface of the recess 25 may be formed flat.

[0029] 1, the bottom plate 20 of the packaging box 1A of the first embodiment is configured by stacking an inner flap 21 and an outer flap 22, but the configuration of the bottom plate 20 is not limited thereto. For example, the bottom plate 20 may be configured so that a single outer flap 22 closes the opening on the lower side of the body 10, and a recess 25 may be formed on the inner surface of the outer flap 22.

[0030] In the packaging box 1A of the first embodiment, the box body 50 is provided with the top plate 30, but the configuration of the top plate 30 is not limited, and for example, an opening may be formed in the top plate 30. Furthermore, the box body 50 may not be provided with the top plate 30, and the top surface of the box body 50 may be formed in a tray shape with an opening.

[0031] The body 10 of the packaging box 1A of the first embodiment is formed in a rectangular cylindrical shape, but the shape of the body 10 is not limited thereto. For example, an inclined wall may be provided between the end wall 11 and the side wall 12, and the body 10 may be formed in a polygonal cylindrical shape such as a hexagonal or octagonal shape.

[0032] The packaging box 1A of the first embodiment is made of corrugated cardboard, but the packaging box may also be made of various known paperboards.

[0033] [Second embodiment] Next, a packaging box 1B according to a second embodiment of the present invention will be described. As shown in FIG. 6, the packaging box 1B of the second embodiment has substantially the same configuration as the packaging box 1A of the first embodiment (see FIG. 3) described above, but differs in the location where the recessed portion 25 is formed. The packaging box 1B of the second embodiment is formed by mountain-folding or valley-folding the blank sheet S2 shown in Fig. 5 at each fold line. The blank sheet S2 shown in Fig. 5 is arranged so that the inner side is visible.

[0034] 6, in the packaging box 1B of the second embodiment, recesses 25 are formed only on the left and right edges of the inner flap 21. Similar to the first embodiment, the recesses 25 of the second embodiment also extend in a strip shape from the hole 60, and the upper surface thereof is inclined so that the outer sides of the inner flap 21 are lower than the center side.

[0035] In the packaging box 1B of the second embodiment described above, when the bottom plate 20 tilts during transportation, etc., water on the inner surface of the bottom plate 20 flows into the recessed portion 25, flows inside the recessed portion 25, and is drained to the outside through the hole portion 60. Therefore, even if the crushed area is small, the drainage efficiency can be improved.

[0036] The above describes the second embodiment of the present invention, but the present invention is not limited to the second embodiment, and similar to the first embodiment, it can be modified as appropriate within the scope of the spirit thereof. [Explanation of symbols]

[0037] 1A Packaging box (first embodiment) 1B Packaging box (second embodiment) 10. Torso 11 End Wall 12 Side wall 13 Joint piece 20 Bottom plate 21 Inner flap 22 outer flap 25 recess 30 Top plate 31 Inner flap 32 outer flap 50 box body 51 Corner 60 Hole F-formwork S1 Blank sheet (first embodiment) S2 Blank sheet (second embodiment)

Claims

1. a cylindrical body portion having front and rear end walls and left and right side walls; a bottom plate provided at an opening on the lower side of the body portion, A hole is formed in a lower corner of the box body, A recess formed by crushing is formed on the edge of the inner surface of the bottom plate, the recessed portion extends from the hole portion along the edge of the bottom plate, A packaging box characterized in that, in a direction intersecting an extension direction of the recessed portion, the upper surface of the recessed portion is inclined so that the outer side is lower than the center side of the bottom plate.

2. The packaging box according to claim 1, The bottom plate is an inner flap connected to a lower edge portion of the end wall; an outer flap connected to the lower edge of the side wall, The outer flap is overlapped on the outer surface of the inner flap, The packaging box is characterized in that the recessed portions are formed on the left and right edge portions of the inner flap.

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