JP2024071869A - Packaging box - Google Patents

Abstract

To provide a packaging box that is unlikely to hurt the fingers when the box is pulled up by putting hands through handle holes.
[Solution] A packaging box 1A has a folding plate 60 disposed within a handle hole 50 formed in a wall portion 10. The folding plate 60 is connected to an upper edge portion 51 of the handle hole 50 via folding lines L10 and L20. The upper edge portion 51 of the handle hole 50 is formed with a middle edge portion 51a extending laterally and two inclined edges 51b, 51b extending obliquely upward from both ends of the middle edge portion 51a. The folding plate 60 is formed with an intermediate plate 61 connected to the middle edge portion 51a and two side plates 62, 62 connected to both inclined edges 51b, 51b, respectively.
[Selected figure] Figure 3

Description

The present invention relates to a packaging box.

Some cardboard packaging boxes have a bottom plate, a cylindrical wall portion connected to the edge of the bottom plate, and a top plate connected to the upper edge of the wall portion, and a handle hole formed in the wall portion is blocked by a folding plate (see, for example, Patent Document 1). When lifting such a packaging box, the folding plate is pushed inward to open the handle hole.

JP 2013-241216 A

In the conventional packaging box described above, when the folding plate is folded upward and inward against the wall, a crease is formed at the upper edge of the handle hole. With this configuration, there is a problem in that when the user places their hand on the upper edge of the handle hole and pulls up, their fingers are likely to hurt.

The present invention aims to solve the above problems and provide a packaging box that is less likely to hurt the fingers when pulling it up by putting the hands through the handle holes.

In order to solve the above problem, the present invention provides a packaging box comprising a bottom plate and a cylindrical wall portion connected to the edge of the bottom plate. A handle hole is formed in the wall portion, and a folding plate is disposed within the handle hole, and the folding plate is connected to the upper edge of the handle hole via a fold line. The upper edge of the handle hole is formed with a middle edge portion extending laterally and two inclined edges extending diagonally upward from both ends of the middle edge portion. The folding plate is formed with an intermediate plate connected to the middle edge portion, and two side plates connected to both inclined edges, respectively.

In the packaging box of the present invention, when the folding plate is pushed inward, a horizontal fold is formed between the upper ends of both inclined edges of the handle hole, and a part of the wall and the folding plate are folded inward at this fold. Furthermore, by folding the folding plate upward at the fold line, the folding plate can be folded back toward the inner side of the wall.
In this way, in the packaging box of the present invention, the folding plate is folded back toward the inner side of the wall portion via two ridges (creases). As a result, when the packaging box of the present invention is pulled up by putting hands on the upper edge of the handle hole, the fingers come into contact with the strip-shaped surface between the two ridges, so that the fingers are less likely to get hurt.

In the packaging box of the present invention, the folding plate is divided into an intermediate plate and a side plate, so that the intermediate plate and the side plate are folded independently in the process of folding the folding plate inward. This allows the folding plate to be folded toward the inner surface of the wall even if the upper edge of the handle hole is bent. In addition, when the side plate of the folding plate comes into contact with the contents, the side plate can be prevented from rubbing strongly against the contents.

When the packaging box of the present invention is made of corrugated cardboard, it is preferable that the corrugations of the cardboard of the wall portion extend in the horizontal direction.
In this configuration, when the folding plate is pressed inward, a lateral fold can be formed in the wall with little force.

A secondary fold line extending laterally may be formed between upper ends of both the inclined edges in the wall portion of the packaging box.
With this configuration, when the folding plate is pushed inward, the auxiliary fold line allows the horizontal fold to be neatly formed in the wall with little force. For example, even if the corrugations of the cardboard of the wall extend in the vertical direction and it is difficult to fold the wall in the vertical direction, it becomes easier to form a horizontal fold in the wall.

When the packaging box has a top plate connected to the upper edge of the wall portion, it is preferable that the fold-back plate is configured to abut against the inner surface of the top plate when folded upward and inward against the wall portion.
In this configuration, when a hand is put through the handle hole and pulled up, part of the upward force acting on the upper edge of the handle hole can be supported by the folding plate, so that the handle hole can be prevented from deforming and the wall from tearing when the packaging box is lifted.

In the packaging box of the present invention, the folding plate is folded back toward the inner side of the wall section via two ridges, and when the user places his or her hand on the upper edge of the handle hole and pulls it up, the fingers come into contact with the strip-shaped surface between the two ridges, making it less likely that the fingers will get hurt.

1 is a perspective view of a packaging box according to a first embodiment of the present invention, viewed from the upper left front side. FIG. 1 is a diagram showing a blank sheet for a packaging box according to a first embodiment of the present invention; 1 is a front view showing a handle hole and a flap plate of a packaging box according to a first embodiment of the present invention. FIG. 1 is a front view showing a state in which a folding plate is in the middle of being folded back onto an end wall in the packaging box according to the first embodiment of the present invention. FIG. 4 is a side cross-sectional view showing a state in which a folding plate is folded back against an end wall in the packaging box according to the first embodiment of the present invention. FIG. FIG. 11 is a front view showing the handle holes and the flap plate of the packaging box according to the second embodiment of the present invention. FIG. 11 is a diagram showing a blank sheet for a packaging box according to a second embodiment of the present invention.

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 duplicate descriptions will be omitted.
In the following description, the front, rear, left and right directions are set for the sake of convenience in describing the packaging box of this embodiment, and do not limit the configuration or usage state of the packaging box of the present invention.

[First embodiment]
1, the packaging box 1A of the first embodiment includes a bottom plate 20, a cylindrical wall portion 10 connected to an edge of the bottom plate 20, and a top plate 30 connected to an upper edge of the wall portion 10. The packaging box 1A of the first embodiment is a wrap-around type cardboard box.
The wall portion 10 of the first 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.

The contents stored in the packaging box 1A of the first embodiment are not limited, but in the first embodiment, as shown in FIG. 4, a case in which a PET bottle is stored as the contents P will be described as an example. In the packaging box 1A of the first embodiment, multiple contents P are stored in four rows on the left and right.

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.
In the blank sheet S1 of the first embodiment, the corrugations (waves of the flutes) of the cardboard extend in the left-right direction (horizontal direction) in FIG.

The fold lines of the blank sheet S1 are lines (creases) formed by linearly pressing the surface of the blank sheet S1. Note that the creases may be formed with intermittent cuts. In this way, it becomes easier to fold the blank sheet S1 at the fold lines.
Alternatively, the folded lines may be formed by forming half-cut slits that cut only the surface of the sheet or by forming intermittent linear slits that penetrate the sheet.

The cutting guide line of the blank sheet S1 is formed by a single continuous slit or a line with multiple intermittent slits. The cutting guide line may also be formed by a half-cut line.

As shown in FIG. 1, the bottom plate 20 is a rectangular flat plate (see FIG. 2). The left side wall 12 is connected to the left edge of the bottom plate 20 via a fold line, and the right side wall 12 is connected to the right edge of the bottom plate 20 via a fold line. The left and right side walls 12, 12 are the same rectangular wall body and are formed perpendicular to the bottom plate 20.

A top plate 30 is connected via a folding line to the upper edge of the left side wall 12. The top plate 30 is a flat rectangular plate like the bottom plate 20, and is formed perpendicular to the left side wall 12.
The blank sheet S1 (see Figure 2) is folded at each fold line, and the joining piece 13 connected to the upper edge of the right side wall 12 is joined to the inner surface of the top plate 30, so that the right side wall 12, the bottom plate 20, the left side wall 12 and the top plate 30 are formed into a rectangular tube shape.

The front end wall 11 includes a pair of upper and lower outer flaps 14, 14 connected to the front edges of the top plate 30 and the bottom plate 20, respectively, and a pair of left and right inner flaps 15, 15 connected to the front edges of the left and right side walls 12, 12, respectively. The outer flaps 14, 14 are overlapped and joined to the outer surfaces of the inner flaps 15, 15. In this embodiment, the outer flaps 14, 14 are arranged at an interval in the up-down direction, and the inner flaps 15, 15 are arranged at an interval in the left-right direction.
In the first embodiment, as shown in FIG. 3, the corrugations of the cardboard of the outer flap 14 extend in the left-right direction (horizontal direction).

As shown in FIG. 1, the rear end wall 11 of the packaging box 1A is symmetrical to the front end wall 11 and is made up of upper and lower outer flaps 14, 14 and left and right inner flaps 15, 15.

As shown in FIG. 3, the upper outer flap 14 of the front end wall 11 is formed with a hand hole 50.
The handle hole 50 is disposed between the left and right inner flaps 15, 15, and passes through the center of the outer flap 14. The handle hole 50 is a portion where the hands are placed when carrying the packaging box 1A.
The hand hole 50 is formed to be larger in the left-right direction than in the up-down direction, that is, the hand hole 50 has a shape that is wide in the left-right direction.

The upper edge 51 of the hand hole 50 is formed with a middle edge 51a and left and right inclined edges 51b, 51b formed on both the left and right sides of the middle edge 51a.
The middle edge portion 51 a extends linearly in the left-right direction (horizontal direction) along the corrugations of the cardboard of the outer flap 14 .
The left inclined edge 51b extends obliquely upward to the left from the left end of the intermediate edge 51a, and the right inclined edge 51b extends obliquely upward to the right from the right end of the intermediate edge 51a.
In this manner, the upper edge 51 of the hand hole 50 is bent upward at both left and right portions with respect to the middle portion.

The middle part of the lower edge 52 of the handle hole 50 extends in a straight line parallel to the middle part of the upper edge 51. In addition, the left and right parts of the lower edge 52 are bent upward from the middle part.

The opening shape of the hand hole 50 is such that the left and right side portions are bent upward from the middle portion. In addition, the left and right side edges 53, 53 of the hand hole 50 are curved in a semicircular shape so as to protrude outward in the left-right direction.

A folding plate 60 is disposed inside the handle hole 50. The folding plate 60 is formed in the same shape as the opening of the handle hole 50. In other words, the handle hole 50 is closed by the folding plate 60. As shown in FIG. 4, when carrying the packaging box 1A, the folding plate 60 is pushed inward to open the handle hole 50.

As shown in FIG. 3, the folding plate 60 is formed with an intermediate plate 61 connected to the intermediate edge 51a of the upper edge 51 of the hand hole 50, and two side plates 62, 62 connected to the left and right inclined edges 51b, 51b of the upper edge 51 of the hand hole 50.

The intermediate plate 61 is a portion that covers the center of the hand hole 50 in the left-right direction, and is formed in a rectangular shape. The upper edge of the intermediate plate 61 is connected to the middle edge 51a of the upper edge 51 of the hand hole 50 via a first fold line L10. The lower edge of the intermediate plate 61 is connected to the lower edge 52 of the hand hole 50 via a cutting guide line L30.

The left side plate 62 is a portion that closes the left side portion of the hand hole 50. The upper edge portion of the left side plate 62 is connected to the left inclined edge portion 51b of the upper edge portion 51 of the hand hole 50 via a second fold line L20. In addition, the right edge portion of the left side plate 62 is connected to the left edge portion of the intermediate plate 61 via a slit L40.
Furthermore, the edges of the left side plate 62 other than the upper edge and the right edge are connected to the left side edge 53 of the hand hole 50 via a cutting guide line L30. The upper left side portion of the cutting guide line L30 is cut upward from the left end of the second folded line L20 (the left end of the inclined edge 51b).

The right side plate 62 is a portion that closes the right side of the hand hole 50. The upper edge of the right side plate 62 is connected to the right inclined edge 51b of the upper edge 51 of the hand hole 50 via a second fold line L20. In addition, the left edge of the right side plate 62 is connected to the right edge of the intermediate plate 61 via a slit L40.
Further, among the edges of the right side plate 62, the edges other than the upper edge and the left edge are connected to the right side edge 53 of the hand hole 50 via a cutting guide line L30. The upper right part of the cutting guide line L30 is cut upward from the right end of the second folded line L20 (the right end of the inclined edge 51b).

The two slits L40, L40 on the left and right are formed with a gap between them in the left-right direction (horizontal direction). In the first embodiment, the left and right slits L40, L40 are parallel to each other.

As shown in FIG. 1, in the packaging box 1A, the upper outer flap 14 of the rear end wall 11 is also formed with a handle hole 50 and a fold-back plate 60, similar to the front end wall 11.

As shown in Fig. 4, when opening the handle hole 50 with the contents P contained in the packaging box 1A, the fold-back plate 60 is pushed inward. This cuts open the cutting guide line L30, and the edges of the fold-back plate 60 other than the upper edge are cut off from the opening edge of the handle hole 50.
Furthermore, when the folding plate 60 is pushed inwardly of the end wall 11, both slits L40, L40 of the folding plate 60 are cut open, and the intermediate plate 61 and both side plates 62, 62 are separated.

When the folding plate 60 is pressed inward, a fold line L50 extending in the horizontal direction is formed between the upper ends of both inclined edges 51b, 51b of the handle hole 50. A part of the end wall 11 and the folding plate 60 are folded inward at the fold line L50.
In addition, since the cutting guide line L30 is cut upward from the end of the fold line L50, it is possible to prevent the end wall 11 from tearing from the end of the fold line L50.

Furthermore, as shown in FIG. 5, the intermediate plate 61 is bent upward and inward relative to the end wall 11 at the first fold line L10, and the side plate 62 is bent upward and inward relative to the end wall 11 at the second fold line L20, so that the folded plate 60 is folded back toward the inner surface of the end wall 11.

In this way, the hand hole 50 in the end wall 11 can be opened by folding the folding plate 60 back toward the inner surface of the end wall 11 at the fold line L50, the first fold line L10, and the second fold line L20.

In the packaging box 1A of the first embodiment, as shown in FIG. 3, the vertical length L2 of the intermediate plate 61 of the fold-back plate 60 is larger than the vertical distance L1 between the upper edge of the end wall 11 and the upper edge 51 of the handle hole 50.
5, when the folding plate 60 is folded back toward the inner surface of the end wall 11, the tip of the intermediate plate 61 abuts against the inner surface (lower surface) of the top plate 30. As a result, a truss structure is formed by the upper portion of the end wall 11, the top plate 30 and the folding plate 60.

As shown in FIG. 5, the packaging box 1A of the first embodiment described above is folded back toward the inner side of the end wall 11 via two ridges (creases). As a result, when the packaging box 1A is pulled up by placing the hand on the upper edge 51 of the handle hole 50, the fingers come into contact with the strip-shaped surface between the two ridges, so the fingers are less likely to get hurt.

In the packaging box 1A of the first embodiment, as shown in FIG. 3, the corrugations of the cardboard on the outer flap 14 of the end wall 11 extend in the left-right direction (horizontal direction). Therefore, as shown in FIG. 4, when the folding plate is pushed inward, a horizontal crease L50 can be formed in the end wall 11 with little force.

In the packaging box 1A of the first embodiment, the folding plate 60 is divided into the middle plate 61 and the two side plates 62, 62, so that the middle plate 61 and the two side plates 62, 62 are folded independently in the process of folding the folding plate 60 inward. This allows the folding plate 60 to be folded toward the inner surface of the end wall 11 even if the upper edge 51 of the handle hole 50 is bent.
Furthermore, in the packaging box 1A of the first embodiment, when the side plate 62 of the fold-back plate 60 comes into contact with the contents P, the side plate 62 can be prevented from being strongly rubbed against the contents P.

In the packaging box 1A of the first embodiment, as shown in FIG. 5 , when the folding plate 60 is folded upward and inward relative to the end wall 11 , the folding plate 60 abuts against the inner surface of the top plate 30 .
In this configuration, when the hand is put into the hand hole 50 and pulled up, a part of the upward force acting on the upper edge 51 of the hand hole 50 can be supported by the folding plate 60, so that when the packaging box 1A is lifted, the hand hole 50 can be prevented from deforming and the end wall 11 from tearing.

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 appropriately modified without departing from the spirit of the present invention.
In the packaging box 1A of the first embodiment, as shown in FIG. 3, the left and right slits L40, L40 are parallel to each other. However, the horizontal distance between the left and right slits L40, L40 may be formed to become narrower toward the bottom.

In the packaging box 1A of the first embodiment, the handle hole 50 is blocked by the fold-back plate 60, but the fold-back plate 60 may be configured to block part of the handle hole 50.

As shown in FIG. 1, the packaging box 1A of the first embodiment has a wall 10 formed in a rectangular cylindrical shape, but the shape of the wall 10 is not limited thereto. For example, the wall 10 may be formed in a polygonal cylindrical shape such as a hexagon or octagon.

The packaging box 1A in the first embodiment is a wrap-around type cardboard box, but the type of box is not limited to this, and may be, for example, an A-type cardboard box or a tray-shaped box with an open top.

The packaging box 1A in the first embodiment is made of corrugated cardboard, but the packaging box may also be made of any known paperboard.

[Second embodiment]
Next, a packaging box 1B according to a second embodiment will be described. The packaging box 1B according to the second embodiment shown in Fig. 6 is an A-type cardboard box (see Fig. 7).
The hand hole 50 of the packaging box 1B of the second embodiment has a configuration substantially similar to that of the hand hole 50 of the packaging box 1A of the first embodiment, except that an auxiliary fold line L60 is formed in the end wall 11.

The packaging box 1B of the second embodiment is formed by mountain-folding or valley-folding the blank sheet S2 shown in Fig. 7 at each fold line. The blank sheet S2 shown in Fig. 7 is arranged so that the inner side is visible.
In the blank sheet S2 of the second embodiment, the corrugations (waves of the flutes) of the cardboard extend in the up-down direction (vertical direction) in FIG.

In the packaging box 1B of the second embodiment, an auxiliary fold line L60 extending in the horizontal direction is formed between the upper ends of both inclined edges 51b, 51b of the handle hole 50.
In this configuration, when the folding plate 60 is pushed inward, a fold is formed between the upper ends of both inclined edges 51b, 51b of the handle hole 50 by the auxiliary folding line L60.

As a result, even if the corrugations of the cardboard on the outer flap 14 of the end wall 11 extend in the vertical direction and it is difficult to fold the outer flap 14 in the vertical direction, when the folding plate 60 is pushed inward, the auxiliary fold line L60 makes it easy to form a horizontal crease in the outer flap 14 (end wall 11).

The above describes the second embodiment of the present invention. However, the present invention is not limited to the second embodiment, and similarly to the first embodiment, it can be modified appropriately without departing from the spirit of the present invention.
For example, the packaging box 1B of the second embodiment is an A-type cardboard box, but the type of the box is not limited thereto.

1A Packaging box (first embodiment)
1B Packaging box (second embodiment)
REFERENCE SIGNS LIST 10 Wall portion 11 End wall 12 Side wall 13 Joint piece 14 Outer flap 15 Inner flap 20 Bottom plate 30 Top plate 50 Handle hole 51 Upper edge portion 51a Middle edge portion 51b Sloped edge portion 52 Lower edge portion 53 Side edge portion 60 Fold-back plate 61 Middle plate 62 Side plate L10 First fold line L20 Second fold line L30 Cutting guide line L40 Slit L50 Fold L60 Auxiliary fold line P Contents S1 Blank sheet (first embodiment)
S2 Blank sheet (second embodiment)

Claims (4)

A packaging box,
The bottom plate and
A cylindrical wall portion connected to an edge portion of the bottom plate,
A hand hole is formed in the wall portion,
A folding plate is disposed within the handle hole,
The folding plate is connected to an upper edge of the handle hole via a folding line,
The upper edge of the hand hole is
a laterally extending intermediate edge;
Two inclined edges extending obliquely upward from both ends of the intermediate edge are formed,
The folding plate has:
An intermediate plate connected to the intermediate edge portion;
and two side panels respectively connected to the two inclined edge portions. The packaging box according to claim 1,
It is made of cardboard,
A packaging box, characterized in that the corrugations of the cardboard of the wall portion extend horizontally. The packaging box according to claim 1,
A packaging box, characterized in that an auxiliary fold line extending laterally is formed in the wall portion between the upper ends of both the inclined edges. The packaging box according to claim 1,
A top plate is provided adjacent to an upper edge of the wall portion,
A packaging box, characterized in that, when the folding plate is folded upward and inward relative to the wall portion, the folding plate abuts against an inner surface of the top plate.

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