JP2001253432A - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging box which can sufficiently maintain the strength of a side plate, reliably remove a substantially upper half portion of the side plate, prevent generation of excessive cuttings, and smoothly form a tray. SOLUTION: In this packaging box which form the tray 15 by removing the substantially upper half portion 14 of the side plates 4, 5, 7, 8 erected along a peripheral edge of a bottom plate 3, one perforation i, m formed of a plurality of cuts arranged straight along a lower edge of the substantially upper half portion 14 to be removed and a breakage starting portion j, n by the cut extended toward the perforation i, m from upper edges of the side plates 4, 5 are provided in the side plates 4, 5, 7, 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a corrugated cardboard packaging box capable of forming a tray after unpacking.

[0002]

2. Description of the Related Art Heretofore, a wrap-around case in which contents are placed on a punched corrugated paperboard, the corrugated paperboard is bent so as to wrap the contents, and the packaging of the contents is completed simultaneously with assembling a box. Packaging boxes are known. In this type of packaging box, the package is opened by removing the top plate, and the contents can be taken out from the inside. In addition, this type of packaging box is shaped like a tray by cutting off the top half of the side wall after removing the top plate,
The contents can be exposed and displayed. At this time, the so-called zipper comprising a pair of breakable lines extending in parallel with a predetermined width along the lower edge of the upper half portion to be cut out so that the upper half portion can be easily cut off. (Registered trademark).

[0003] The two breakable lines constituting the zipper are constituted by a plurality of cuts each arranged linearly. The zipper has a rupture start portion at a part thereof connecting the rupturable lines, and the zipper can be used as a clue to cut off in a strip shape to remove a substantially upper half of the side plate.

However, this type of zipper can be easily broken because it is formed of two breakable lines, but the provision of the zipper reduces the pressure resistance of the side plate and is relatively heavy. When the contents are packed and stacked, there is a possibility that the contents may be accidentally broken from the zipper portion.

In order to cut off the upper half of the side plate without providing the zipper, a tape made of synthetic resin is attached to the back liner side of the corrugated cardboard of the side plate, and the tape is attached. In addition, a part provided with a break start part due to a cut is mentioned. When forming the tray, a part of the side plate is cut in a band shape along the tape using the break start portion as a clue to remove the substantially upper half portion. According to the tape, a part of the side plate can be cut in a band shape without providing a pair of breakable lines by a cut such as the zipper, so that the pressure resistance of the side plate can be prevented from lowering.

However, when the side plate is broken through the tape, there is a disadvantage that a stronger force is required than the zipper. Also, the breaking force of the corrugated cardboard applied to the tape works well in the back liner, but it is dispersed until it reaches the front liner through the center core, so the front liner on the tray peripheral wall breaks irregularly. The core may be peeled off and the core may be unsightly exposed, which is unsuitable for displaying the contents. Further, since the tape is made of a synthetic resin, there is an inconvenience that the cardboard is difficult to be recycled.

When the above-described zipper or the synthetic resin tape is used, in addition to the substantially upper half of the side plate to be cut off, an excess cut off along the zipper or the tape. There is an inconvenience that chips are generated and disposal processing is troublesome.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention can maintain the strength of the side plate sufficiently, can cut off the upper half of the side plate reliably, and further reduce the generation of extra chips. It is an object of the present invention to provide a packaging box which can prevent the tray from being formed smoothly.

[0009]

In order to achieve the above object, the present invention comprises a bottom plate, a side plate standing upright along a peripheral edge of the bottom plate, and a top plate facing the bottom plate via the side plate. In a corrugated cardboard packaging box in which a tray is formed by removing the top plate and unpacking the package, and then cutting off the approximately upper half of the side plate after unpacking, the side plate is substantially cut off. A breakable line formed by a plurality of cuts linearly arranged along the lower edge of the half portion, and a break start portion formed by a cut extending from the upper edge of the side plate toward the breakable line are provided. It is characterized by the following.

According to the present invention, since a single breakable line is provided to cut off substantially the upper half of the side plate, the pressure resistance of the side plate can be sufficiently improved as compared with a conventional zipper formed by two breakable lines. Obtainable.

Further, when forming the tray in the packaging box of the present invention, after the top plate is removed, the tray is broken along one breakable line using the break start portion as a clue. Since the breakable line is formed by a plurality of cuts, the break can be accurately advanced along the lower edge of the substantially upper half portion to be cut. This makes it possible to form a tray suitable for displaying the contents without causing any unsightlyness due to irregular breakage as in the case of using a conventional synthetic resin tape.

Further, since the substantially upper half of the side plate is broken and separated through one breakable line, the chips generated when the tray is formed are substantially only the upper half of the separated side plate.
When a conventional zipper or a tape made of a synthetic resin is used, no extra band-shaped chips are generated along the zipper or the tape, and the trouble in the disposal process can be reduced.

Further, in the present invention, the break start portion extends from an upper edge of the side plate to any one of a pair of cuts constituting the breakable line, and a lower end portion of the break start portion. Is provided with a break guide portion extending continuously from the break start portion toward both cuts. Thereby, the breaking force is smoothly applied from the lower end of the breaking start portion toward the break of the breakable line by the break guiding portion, and even if the breakable line is a plurality of breaks arranged in a single line, the breakable line becomes a breakable line. Along the breaking along, it is possible to reliably proceed.

[0014]

An embodiment of the present invention will be described with reference to the drawings. 1 is an explanatory perspective view showing the appearance of the packaging box of the present embodiment, FIG. 2 is a plan view of the packaging box shown in FIG. 1 in an unfolded state, FIG. 3 is an explanatory perspective view of the packaging box in an unpacking process, and FIG. FIG. 4 is an explanatory perspective view of a packaging box in a tray forming step.

As shown in FIG. 1, the packaging box 1 of the present embodiment is formed in a rectangular parallelepiped shape, and contains therein unshown contents. The packaging box 1 is a so-called wraparound case, and as shown in FIG. 2, is assembled by corrugated paperboard 2 formed by punching into a substantially rectangular shape.

The corrugated paperboard 2 comprises a bottom plate 3 and the bottom plate 3.
And a rear plate 5 connected to a rear edge of the bottom plate 3 via a fold line b.
And a top plate 6 connected to a front end edge of the rear side plate 5 via a first breakable line c including a plurality of cuts.

A pair of inner flaps 7 and 8 are connected to the left and right side edges of the front plate 4 and the rear plate 5 via fold lines d and e, respectively. A pair of outer flaps 9 and 10 are connected to each other on the left and right side edges of the plate 6 via fold lines f and g. A tongue piece 11 serving as a clue when the top plate 6 is to be described later is formed at the tip of the outer flap 10 connected to the top plate 6. Further, an adhesive piece 12 that is adhered to the front side plate 4 via a second breakable line h formed of a plurality of cuts is continuously provided at a leading edge of the top plate 6.

Further, on the front side plate 4 and the inner flaps 7 on both sides thereof, a single third breakable line i is formed by a plurality of cuts arranged linearly. The third breakable line i is located at the center of the front side plate 4 from the upper edge of the front side plate 4.
The first break start portion j is formed by a cut extending toward a part of the cut constituting the above. At the lower end of the first break start portion j, a third
A pair of break guides k extending toward the break of the breakable line i are formed. The adhesive piece 12 has a V-shaped cut 13 at a position corresponding to the first breaking start portion j.
Are formed.

Similarly, a single fourth breakable line m is formed on the rear side plate 5 and the inner flaps 8 on both sides thereof by a plurality of cuts arranged linearly. The rear side plate 5
A second break start portion n is formed at a central portion of the rear plate 5 by a cut extending from an upper edge of the rear side plate 5 to a space between some cuts forming the fourth breakable line m. At the lower end of the second break start portion n, a pair of break guide portions p are formed continuously from the second break start portion n and extend toward the break of the fourth breakable line m.

The corrugated paperboard 2 shown in FIG.
When forming the packaging box 1 shown in FIG. 1, a plurality of contents (not shown) are arranged and placed on the bottom plate 3 in the state of the corrugated paperboard 2 shown in FIG. The side plate 5 is erected through each of the fold lines a and b. Next, the inner flaps 7 and 8 on both sides of the both side plates 4 and 5 respectively correspond to the respective fold lines d and
e, the outer flaps 9 are bent along both side edges of the bottom plate 3, and the outer flaps 9 provided on both sides of the bottom plate 3 are erected through the fold line f, and the outer surfaces of the inner flaps 7, 8 are bonded to the outer surfaces. Glued through. Subsequently, the top plate 6 is horizontally bent through the first breakable line c. At this time, the first breakable line c functions as a fold line without being broken. Next, the adhesive piece 12 is adhered to the outer surface of the front side plate 4 via an adhesive. Then, the outer flaps 10 connected to both sides of the top plate 6 are bent downward through the fold line g, and are bonded to the outer surfaces of the inner flaps 7 and 8 via an adhesive, so that the contents are wrapped. Upon completion, the packaging box 1 shown in FIG. 1 is formed.

Next, the unpacking operation of the packaging box 1 will be described. First, as shown in FIG. 3 (a), the outer flaps 10 provided on both sides of the top plate 6 are connected to the inner flaps 7, 8 to peel off. Next, by further pulling up one outer flap 10, the first breakable line c and the second breakable line h
And the top plate 6 is cut off. As a result, as shown in FIG. 3B, the top plate 6 is cut off and the upper part of the packaging box 1 is opened, so that the package is unpacked in a state where the contents can be taken out.

Further, after the top plate 6 is cut off,
For example, when the contents are displayed for sale at the store, first, as shown in FIG.
Using the break start portion j as a key, the substantially upper half portion 14 of the front side plate 4 is broken along the third breakable line i of the front side plate 4. At this time, in more detail, a finger is inserted into a cut at the first breaking start portion j, and the upper half 14 of the front side plate 4 is gripped and pulled outward. Thereby, the breaking force is smoothly applied from the lower end of the first breaking start portion j to the break of the third breakable line i by the breaking guide portion k, and the plurality of third breakable lines i are arranged in a single line. Even at the break, the break along the third breakable line i can be reliably advanced. In this manner, the tray 15 is formed as shown in FIG. 4B by cutting off the substantially upper half portions 14 of the side plates 4 and 5 and the inner flaps 7 and 8.

As described above, the substantially upper half portions 14 of the side plates 4 and 5 and the inner flaps 7 and 8 are formed by a third breakable line i and a fourth breakable line m formed by a plurality of cuts arranged in a line. As a result, compared to the case where a conventional synthetic resin tape is employed, not only the breaking force is small but also no extra chips are generated, and the tray 15 has a broken edge. Since it is relatively smooth, it can be suitably used in display of contents.

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view showing the appearance of a packaging box according to an embodiment of the present invention.

FIG. 2 is a plan view of the packaging box in FIG. 1 in an unfolded state.

FIG. 3 is an explanatory perspective view of a packaging box in an unpacking step.

FIG. 4 is an explanatory perspective view of a packaging box in a tray forming step.

[Explanation of symbols]

1 ... packaging box, 3 ... bottom plate, 4 ... front side plate (side plate), 5 ... rear side plate (side plate), 6 ... top plate, 7, 8 ... inner flap (side plate),
14: approximately upper half, 15: tray, i: third breakable line (breakable line), m: fourth breakable line (breakable line),
j: first break start portion (break start portion), n: second break start portion (break start portion), k, p: break guide portion.

Claims (2)

[Claims] 1. A bottom plate, a side plate standing upright along a peripheral edge of the bottom plate, and a top plate facing the bottom plate via the side plate, and unpacked by removing the top plate, and unpacking. In a corrugated cardboard packaging box in which a tray is formed by subsequently cutting out substantially the upper half of the side plate, the side plate has a plurality of linearly arranged along the lower edge of the substantially upper half to be cut out. One breakable line due to the break,
A breaking start portion formed by a cut extending from an upper edge of the side plate toward the breakable line. 2. The break start portion extends from an upper edge of the side plate to a position between any pair of cuts forming the breakable line, and a lower end of the break start portion has The packaging box according to claim 1, further comprising a break guide portion extending continuously from the break start portion toward both cuts.