Packing box

Abstract

To provide a packing box that is stable when lifted and easy to carry.SOLUTION: The packing box 1 comprises a bottom part 20 and a cylindrical wall part 10 provided connected to edges of the bottom part 20, and the wall part 10 has front and rear edge walls 11, 111 and right and left side walls 12, 12, and holes 50 for hands are formed on the bottom of the side walls 12, 12, respectively.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] 2. Description of the Related Art Some corrugated cardboard packaging boxes have front and rear end walls and left and right side walls, with handle holes formed in the upper ends of the side walls (see, for example, Patent Document 1). When transporting such a packaging box, the box is lifted by placing hands in the hand holes on both side walls. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-116284 A Summary of the Invention [Problem to be solved by the invention]

[0004] When the conventional packaging box described above is filled with contents and the user places his / her hands through the handle holes formed in the upper end of the side wall to lift the box, the center of gravity of the box is located lower than the waist and is far away from the center of gravity of the person (see center of gravity G2 of conventional packaging box 1A in FIG. 7). Therefore, when the contents of the conventional packaging box described above are heavy, a large force is required to support the packaging box in a lifted state, making it difficult to carry the box.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to solve the above-mentioned problems and to provide a packaging box which is easy to stabilize when lifted and can be carried easily. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides a packaging box comprising a bottom plate and a cylindrical wall portion connected to an edge of the bottom plate, the wall portion having front and rear end walls and left and right side walls, and a handle hole formed in the lower part of each of the side walls.

[0007] In the present invention, when the packaging box is lifted by placing both hands in the two-hand hanging holes, the center of gravity of the packaging box is located at a height close to the waist, approaching the center of gravity of the person, and the lower part of the packaging box is supported, so that the upper part of the packaging box can be attached to the body above the waist. Therefore, even if the content is heavy, the packaging box can be easily stabilized when lifted, and the packaging box can be easily carried with little force.

[0008] In the above-mentioned packaging box, the side walls have front and rear inner flaps respectively connected to the side edges of the end walls and a bottom flap connected to the edge of the bottom plate, and the bottom flap is superimposed on the outer surfaces of the both inner flaps. When the hand hole is formed in the bottom flap and the lower corner of the tip of the inner flap is located inside the hand hole, it is preferable to form a fold line extending from the tip edge to the lower edge of the inner flap.

[0009] In this configuration, when the cover plate comes into contact with the corners of the inner flaps during the process of folding the cover plate inwardly of the side walls, the corners of the inner flaps are pushed by the cover plate and bent inwardly. Then, when a user inserts his or her hand into the handle hole from the outside to lift the packaging box, the hand is placed on the upper edge of the handle hole and the folded part of the inner flaps, so that the user's fingers are less likely to get hurt.

[0010] In the above-mentioned packaging box, when a cover plate is placed within the handle hole, it is preferable to form on the cover plate an intermediate plate connected to the lower edge of the handle hole via a first fold line, and two side plates connected to both side edges of the intermediate plate via second fold lines, respectively. In this configuration, when the lid plate comes into contact with the inner flap or the contents during the process of folding the lid plate inward toward the side wall, the side plates of the lid plate are pushed by the inner flap or the contents and bend relative to the middle plate, thereby preventing the lid plate from rubbing strongly against the contents.

[0011] In the above-mentioned packaging box, if the horizontal distance between the two second fold lines is narrowed toward the top, it becomes easier to pass the cover plate between two adjacent contents when the cover plate is folded inward toward the side wall. Effect of the Invention

[0012] In the present invention, when the packaging box is held by putting hands through the handle holes, the center of gravity of the packaging box approaches the center of gravity of the person, making it easy to stabilize the packaging box, and the packaging box can be easily carried with little force. [Brief description of the drawings]

[0013] [Figure 1] 1 is a perspective view of a packaging box according to an embodiment of the present invention, viewed from the upper left front side. [Diagram 2] 1 is a perspective view of a packaging box according to an embodiment of the present invention, viewed from the upper right front side. FIG. [Diagram 3] FIG. 2 is a diagram showing a blank sheet for a packaging box according to an embodiment of the present invention. [Figure 4] 1 is a side view showing the lower part of the left side wall of a packaging box according to an embodiment of the present invention. FIG. [Diagram 5] 1 is a side cross-sectional view showing both inner flaps at the lower part of the left side wall of a packaging box according to an embodiment of the present invention. [Figure 6] 1 is a side view showing a state in which a cover plate is folded against a side wall in a packaging box according to an embodiment of the present invention. FIG. [Figure 7] FIG. 2 is a side view showing a state in which the packaging box according to the embodiment of the present invention is lifted up. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] 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, 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 of the present invention.

[0015] 1 and 2, the packaging box 1 of this embodiment includes a bottom plate 20, a cylindrical wall portion 10 connected to the edge of the bottom plate 20, and a top plate 30 connected to the upper edge of the wall portion 10. The packaging box 1 of this embodiment is a wrap-around type cardboard box. The wall portion 10 of this embodiment is formed into a rectangular tubular shape by four walls: a pair of front and rear end walls 11, 11 and a pair of left and right side walls 12, 12.

[0016] Although the contents stored in the packaging box 1 of this embodiment are not limited, in this embodiment, as shown in Fig. 7, a case where a plastic bottle is stored as the contents P will be described as an example. In the packaging box 1 of this embodiment, a plurality of contents P are stored in two rows, one in front and one in back.

[0017] The packaging box 1 of this embodiment is formed by mountain-folding or valley-folding a blank sheet S cut out from a cardboard sheet at each fold line, as shown in Fig. 3. The blank sheet S shown in Fig. 3 is arranged so that the inner side is visible. The fold lines of the blank sheet S are creases (pressed creases) formed by linearly pressing the surface of the blank sheet S. Note that the creases may be formed with intermittent cuts. In this way, it becomes easier to fold the blank sheet S at the fold lines. Alternatively, the folded lines may be formed by forming intermittent linear cuts, such as half-cut cuts that cut only the surface of the sheet, or cuts that penetrate the sheet.

[0018] The cutting guide line of the blank sheet S is formed by a single continuous slit or a line in which a plurality of slits are intermittently formed. The cutting guide line may be formed by a half-cut line.

[0019] As shown in Fig. 1, the bottom plate 20 is a rectangular flat plate (see Fig. 3). A front end wall 11 is connected to the front edge of the bottom plate 20 via a fold line, and a rear end wall 11 is connected to the rear edge of the bottom plate 20 via a fold line. The front and rear end walls 11, 11 are the same rectangular wall body and are formed perpendicular to the bottom plate 20.

[0020] A top plate 30 is connected via a folding line to the upper edge of the front end wall 11. The top plate 30 is a rectangular flat plate like the bottom plate 20, and is formed perpendicular to the front end wall 11. The blank sheet S (see Figure 3) is folded at each fold line, and the joining piece 13 connected to the upper edge of the rear end wall 11 is joined to the inner surface of the top plate 30, so that the rear end wall 11, bottom plate 20, front end wall 11 and top plate 30 are formed into a rectangular tube shape.

[0021] The left side wall 12 is provided with a pair of front and rear inner flaps 14, 14 connected to the left edges of the front and rear end walls 11, 11, respectively, an upper flap 15 connected to the left edge of the top plate 30, and a lower flap 16 connected to the left edge of the bottom plate 20. The upper flap 15 and the lower flap 16 are overlapped and joined to the outer surfaces of both inner flaps 14, 14.

[0022] In this embodiment, the tips of the inner flaps 14, 14 are butted against each other, but they may be disposed with a gap therebetween in the front-rear direction. In addition, in this embodiment, the upper flap 15 and the lower flap 16 are arranged with a gap between them in the vertical direction, but the tip of the upper flap 15 and the tip of the lower flap 16 may be butted against each other.

[0023] As shown in Fig. 4, the lower flap 16 is provided with a handle hole 50. The handle hole 50 is a portion where the hands are placed when carrying the packaging box 1 (see Fig. 7). The hand hole 50 is provided in the center in the front-rear direction at the lower end of the lower flap 16. In other words, the hand hole 50 is formed at the lower end of the side wall 12. The hand hole 50 of this embodiment is formed in a rectangular shape that is larger in the front-to-rear direction than in the up-to-down direction. The lower edge of the hand hole 50 is formed at the same position as the lower edge of the lower flap 16 (the lower edge of the side wall 12). In addition, the front and rear corners of the upper side of the hand hole 50 are curved in an arc shape.

[0024] A cover plate 60 is disposed within the handle hole 50. The cover plate 60 in this embodiment has the same shape as the opening shape of the handle hole 50. In other words, the handle hole 50 is closed by the cover plate 60. As shown in Fig. 6, when carrying the packaging box 1, the cover plate 60 is pushed inward to open the handle hole 50.

[0025] As shown in Figure 4, the cover plate 60 is formed with an intermediate plate 61 connected to the lower edge of the handle hole 50 via a first fold line L1, and two side plates 62, 62 connected to both side edges of the intermediate plate 61 via second fold lines L2, L2, respectively.

[0026] The intermediate plate 61 is a portion that closes the center of the hand hole 50 in the front-rear direction, and is formed in a triangle whose width narrows toward the top. The apex of the intermediate plate 61 is connected to the center of the upper edge of the hand hole 50. The lower edge of the intermediate plate 61 is connected to the middle part of the lower edge of the hand hole 50 via a first fold line L1.

[0027] The front side plate 62 is a portion that closes the front portion of the hand hole 50. The rear edge portion of the front side plate 62 is connected to the front edge portion of the intermediate plate 61 via a second fold line L2. The edge portion of the front side plate 62 other than the rear edge portion is connected to the opening edge portion of the hand hole 50 via a cutting guide line. The rear side plate 62 is a portion that closes the rear portion of the hand hole 50. The front edge portion of the rear side plate 62 is connected to the rear edge portion of the intermediate plate 61 via a second fold line L2. The edge portion of the rear side plate 62 other than the front edge portion is connected to the opening edge portion of the hand hole 50 via a cutting guide line. The distance between the front-rear (horizontal) second fold lines L2, L2 on the front-rear direction becomes narrower toward the top.

[0028] As shown in Fig. 5, the lower corners 14a, 14a of the tip portions of both inner flaps 14, 14 are disposed inside the hand hole 50. In other words, the corners 14a, 14a of both inner flaps 14, 14 overlap the opening area of ​​the hand hole 50. Therefore, the corners 14a, 14a of both inner flaps 14, 14 overlap the inner surface of the cover plate 60 (see Fig. 4). A fold line L3 extending obliquely from the tip edge 14c to the bottom edge 14d is formed on the inner flap 14. The fold line L3 is a crease (pressed crease) formed on the inner surface of the inner flap 14. In this embodiment, the fold line L3 is formed in an arc shape that protrudes obliquely downward. At the lower corner 14a of the tip of the inner flap 14, a substantially triangular folded piece 14b is formed which is surrounded by the tip edge 14c and lower edge 14d of the inner flap 14 and the fold line L3.

[0029] The right side wall 12 has a similar structure to the left side wall 12 (see FIG. 1), as shown in FIG. 2. A handle hole 50 is also formed in the lower end of the right side wall 12, and the handle hole 50 is closed by a cover plate 60. Two second fold lines L2, L2 are also formed on the right cover plate 60, and the horizontal distance between the two second fold lines L2, L2 narrows toward the top. As shown in FIG. 3, a bent piece 14b is also formed at a lower corner 14a of the tip of the right inner flap 14.

[0030] When holding the packaging box 1 of this embodiment, as shown in Fig. 6, the cover plate 60 is pushed into the inside of the side wall 12. This cuts open the cutting guide line between the opening edge of the handle hole 50 and the edge of the cover plate 60, and the edge other than the middle part of the lower edge of the cover plate 60 (the edge other than the first fold line L1) is cut off from the opening edge of the handle hole 50.

[0031] When the cover plate 60 is folded inward at the first fold line L1, the side plate 62 of the cover plate 60 comes into contact with the surface of the corner portion 14a of the inner flap 14. Then, when the side plate 62 is pressed by the inner flap 14 or the contents P, the side plate 62 is folded in a valley fold relative to the middle plate 61 at the second fold line L2 when viewed from the outside.

[0032] Furthermore, when the cover plate 60 comes into contact with the corner 14a of the inner flap 14 and the corner 14a of the inner flap 14 is pressed by the cover plate 60, the folding piece 14b is folded at the folding line L3 in a mountain fold relative to the inner flap 14 when viewed from the outside.

[0033] In this manner, the cover plate 60 passes downward and inward between the front and rear contents P, P while the front and rear side plates 62, 62 are folded relative to the intermediate plate 61 and the folding pieces 14b, 14b are folded relative to both inner flaps 14, 14. Then, the cover plate 60 is bent inward relative to the side wall 12, thereby opening the handle hole 50 in the side wall 12.

[0034] In the packaging box 1 of this embodiment as described above, when both hands are placed in the left and right hand holes 50, 50 (see FIGS. 1 and 2) and the packaging box 1 is lifted, the center of gravity G1 of the packaging box 1 is located at a height close to the waist, approaching the center of gravity G of a person, as shown in FIG 7. Also, when the packaging box 1 of this embodiment is lifted, the lower end of the packaging box 1 can be supported and the upper part of the packaging box 1 can be attached to the body above the waist. Therefore, in the packaging box 1 of this embodiment, even if the weight of the contents P is heavy, the packaging box 1 can be easily stabilized when lifted, and the packaging box 1 can be easily carried with little force.

[0035] In the conventional packaging box 1A shown in Fig. 7, the handle holes are formed in the upper end of the side wall, so that when the packaging box 1A is lifted, the center of gravity G2 of the packaging box 1A is located lower than the waist and is far away from the center of gravity G of the person. Therefore, when the content P is heavy in the conventional packaging box 1A, a large force is required to support the packaging box 1A in the lifted state.

[0036] In the packaging box 1 of this embodiment, as shown in Figure 6, when the cover plate 60 is bent inwardly toward the side wall 12 to open the handle hole 50, when the cover plate 60 comes into contact with the corner 14a of the inner flap 14, the bent piece 14b of the inner flap 14 is pushed by the cover plate 60 and bent inwardly. When lifting the packaging box 1 by inserting a hand through the handle hole 50 from the outside, the hand is placed on the upper edge of the handle hole 50 and the folded portion of the inner flap 14, and the portions where the hand is placed are thick. In addition, in this embodiment, the fold line L3 of the corner 14a of the inner flap 14 is curved so as to protrude downward, so that when the folding piece 14b is folded relative to the inner flap 14, the folding portion (edge ​​line) is formed in an arc shape so as to protrude downward. This prevents the fingers from getting hurt when the packaging box 1 is lifted by placing the hands on the upper edge of the handle hole 50.

[0037] In the packaging box 1 of this embodiment, when the cover plate 60 comes into contact with the inner flap 14 or the contents P during the process of folding the cover plate 60 inwardly toward the side wall 12, the side plates 62, 62 of the cover plate 60 are pushed by the inner flap 14 or the contents P and bend relative to the middle plate 61 at both second fold lines L2, L2, thereby preventing the cover plate 60 from rubbing strongly against the inner flap 14 or the contents P. In addition, in the packaging box 1 of this embodiment, the horizontal distance between both second fold lines L2, L2 is narrowed toward the top as shown in Fig. 4. This makes it easier to pass the cover plate 60 between two adjacent contents P, P when the cover plate 60 is folded toward the inside of the side wall 12 as shown in Fig. 6.

[0038] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit of the present invention. In the packaging box 1 of this embodiment, as shown in Fig. 4, the handle hole 50 is formed at the lower end of the side wall 12, but the handle hole 50 may be located away from the lower edge of the side wall 12. The handle hole 50 only needs to be formed below the center of the side wall 12 in the up-down direction.

[0039] In the packaging box 1 of the present embodiment, the handle hole 50 is formed in a rectangular shape, but the shape of the handle hole 50 is not limited thereto.

[0040] In the packaging box 1 of this embodiment, the handle hole 50 is closed by the cover plate 60, but the cover plate 60 may be configured to cover only a portion of the handle hole 50.

[0041] In the packaging box 1 of this embodiment, the lower corner 14a of the tip of the inner flap 14 is positioned inside the handle hole 50, but the corner 14a of the inner flap 14 may be recessed so that the corner 14a of the inner flap 14 is not positioned inside the handle hole 50. In the packaging box 1 of this embodiment, as shown in Fig. 5, the fold line L3 formed at the corner 14a of the inner flap 14 is formed in an arc shape that is convex diagonally downward, but the shape of the fold line L3 is not limited, and for example, the fold line L3 may be formed in a straight line. Furthermore, the fold line L3 does not have to be formed at the corner 14a of the inner flap 14.

[0042] In the packaging box 1 of this embodiment, the horizontal distance between the front and rear second fold lines L2, L2 of the cover plate 60 narrows toward the top as shown in Fig. 4, but the front and rear second fold lines L2, L2 may be parallel to each other. Also, the cover plate 60 does not need to have the second fold line L2.

[0043] In the packaging box 1 of this embodiment, the side walls 12 are formed by overlapping an upper flap 15 and a lower flap 16 on the outer surfaces of the front and rear inner flaps 14, 14, but the configuration of the side walls 12 is not limited, and for example, the upper flap 15 does not need to be provided. In addition, the tips of both inner flaps 14, 14 may be arranged with a gap between them in the front-rear direction, or the tip of the upper flap 15 and the tip of the lower flap 16 may be butted against each other.

[0044] As shown in FIG. 1, the packaging box 1 of this embodiment has wall portion 10 formed in a rectangular cylindrical shape, but the shape of wall portion 10 is not limited thereto, and for example, wall portion 10 may be formed in a polygonal cylindrical shape such as a hexagonal or octagonal shape.

[0045] The packaging box 1 of this embodiment is a wrap-around type cardboard box, but the type of the box is not limited thereto, and may be, for example, an A-type cardboard box. Further, in the packaging box 1 of the present embodiment, the top plate 30 is provided, but the top plate 30 may not be provided and the upper surface of the wall portion 10 may be formed in a tray shape with an opening.

[0046] The packaging box 1 of this embodiment is made of corrugated cardboard, but the packaging box may also be made of various known paperboards. [Explanation of symbols]

[0047] 1 packaging box 10 Wall section 11 End Wall 12 Side wall 13 Joint piece 14 Inner flap 14a Corner 14b Bending piece 14c Tip edge 14d Lower edge 15 Top flap 16 Lower flap 20 Bottom plate 30 Top plate 50 Handle hole 60 Lid plate 61 Intermediate plate 62 Side Panel L1 First broken line L2 Second broken line L3 Line P Contents S Blank Sheet

Claims

1. The bottom plate and A cylindrical wall portion connected to an edge portion of the bottom plate, The wall portion has front and rear end walls and left and right side walls, A packaging box characterized in that a handle hole is formed in the lower part of each of the side walls.

2. The packaging box according to claim 1, The side wall is front and rear inner flaps respectively connected to side edges of both end walls; A lower flap is provided adjacent to an edge of the bottom plate, The lower flap is overlapped on the outer surfaces of both the inner flaps, The hand hole is formed in the lower flap, A lower corner of the tip of the inner flap is disposed inside the hand hole, A packaging box, characterized in that a fold line is formed extending from the tip edge to the bottom edge of the inner flap.

3. The packaging box according to claim 1, A cover plate is disposed within the hand hole, The cover plate has: An intermediate plate connected to a lower edge portion of the hand hole via a first fold line; A packaging box comprising: two side panels formed on both side edges of the intermediate panel and connected to each other via a second fold line.

4. The packaging box according to claim 3, A packaging box, characterized in that the horizontal distance between the two second fold lines narrows toward the top.

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