JP2000255560A - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve efficiency in storing and transporting a packaging box by making the folded outside dimension of the box small in the size. SOLUTION: This relates to a packaging box comprising a bottom face having four sides and a side face part 2 extended each from the bottom face in four directions. The packaging box, in its unfolded condition, is provided with a breaking line 3 for dividing the bottom face and one side of the facing side face groups 22 into two, a folding line 4 for dividing the bottom part and the other side of the facing side face groups 21 into two, and two fitting parts 5, 6 positioned line symmetrically through the break line 3 formed in either side face of one side of the facing side groups 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging box, and more particularly, to a packaging box structure that facilitates disposal after use.

[0002]

2. Description of the Related Art In general, a paper packaging box is formed in a box shape by raising a side portion from a bottom portion having four sides and bonding or engaging a margin extending from the side portion to an adjacent side portion. are doing.

[0003] By the way, this type of packaging box is discarded for incineration or recycling after use of the box. However, since the box is bulky as it is, a user or the like folds the packaging box to reduce the volume and outer dimensions. It is desirable to make it as small as possible.

[0004]

However, in the conventional packaging box, even if it is necessary to reduce the volume and outer dimensions of the box as described above, it is limited to return to the original unfolded state.

[0005] For this reason, the volume can be minimized, but in the case of a large box, the outer size becomes large, which is inconvenient for disposal or the like. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is a technical object of the present invention to provide a packaging box which can significantly reduce an outer dimension when folded and which is easy to handle in disposal of the packaging box.

It is another technical object of the present invention to provide a packaging box which can be easily handled at the time of disposal or the like at a low cost.

SUMMARY OF THE INVENTION The present invention is a packaging box.
In order to solve the above-mentioned technical problem, it is configured as follows.

That is, the first aspect of the present invention includes a bottom portion 1 having four sides, side portions 2 extending from the bottom portion 1 in four directions, and a state in which the bottom portion 1 and each side portion 2 are unfolded. A breaking line 3 bisecting the bottom surface portion 1 and one opposing side surface group 21, a fold line 4 bisecting the bottom surface portion 1 and the other opposing side surface group 22, and one side surface group 2
And two engaging portions 5 and 6 formed on any one of the side portions and arranged symmetrically with the breaking line 3 (corresponding to claim 1).

According to a second aspect of the present invention, in the first aspect, the breaking line 3 is formed parallel to the step 8 of the corrugated cardboard, and the fold line 4 is formed perpendicular to the step 8. (Corresponding to claim 2). The third invention is
In any one of the first and second aspects of the present invention, the engaging portions 5 and 6 are formed by forming cuts in corrugated paper, respectively, and are separated from each other within a width of the side portion. (Corresponding to claim 3).

According to a fourth aspect of the present invention, in any one of the first to third aspects, the fold line 4 extends in a direction away from a side surface on which the engaging portions 5 and 6 are formed, and 1
Are formed at positions distant from the center position (corresponding to claim 4).

[0010] Here, the step is a structure peculiar to cardboard paper. That is, considering the cross section of the corrugated cardboard, the inside has a structure in which skin is stretched on both sides of the corrugated paper. The direction of this corrugation is called a step or a turn.

A large number of parallel lines are formed inside the corrugated cardboard by this waveform. From the viewpoint of folding the corrugated cardboard, the fold tends to meander when folded in parallel with the parallel lines. . On the other hand, when the corrugated paper is folded at right angles to the parallel line of the wave, there is a property that the fold becomes almost straight.

Here, since the break line 3 is formed in parallel with the step 8, meandering of the bending line at the time of bending is prevented, and the fold line 4 is formed perpendicular to the step 8. By doing so, the bending position is determined while securing the strength.

Since the breaking line (perforation) 3 is formed through one of the side groups 21 facing each other and the fold line 4 is formed through the other side group 22, It is configured such that the packaging box in the unfolded state can be folded in four.

In the four-fold state, the two engaging portions 5 and 6 formed on one of the side surfaces of the one side surface group 21 overlap. This is because the two engaging portions 5 and 6 are arranged symmetrically with respect to the breaking line 3. By engaging the engaging portions 5 and 6 thus overlapped, the folding of the packaging box can be prevented,
The outer dimensions can be reduced to about a quarter. Without the engagement portions 5 and 6, the elasticity of the cardboard (corrugated cardboard) causes the original unfolded state.

Incidentally, in order to enhance the effect of preventing the loosening, it is ideal that the engaging portions 5 and 6 are located at positions away from the fulcrum (broken line 3). For this reason, it is desirable that the engaging portions 5 and 6 are formed at positions separated from each other as far as the width of the side surface portion is limited. By providing the engaging portions 5 and 6 at positions away from the fulcrum, the stress for locking is minimized, and the engaging portions are less likely to come off.

However, the set positions of the engaging portions 5 and 6 may be changed depending on the thickness of the material (corrugated paper) of the packaging box. That is, since the packaging box is folded twice from the unfolded state, when the corrugated cardboard is thicker, the overlapping materials tend to separate from each other at the outer end rather than at the center. Therefore,
The engaging portions 5 and 6 can be set at positions where the overlapping materials approach each other in advance and the resilience is less than or equal to a predetermined value (for example, an intermediate position between the center and the outer end). In this case, since the engaging portions 5 and 6 are close to each other, they can easily be engaged with each other, and the engaged state can be favorably maintained even after the engagement.

As the structure of the packaging box, any type can be applied as long as it has a bottom surface and a side surface, but the side surface 2 is replaced with the outer side surface 21a adjacent to the bottom surface 1. And the inner side surface portion 2 adjacent to the outer side surface portion 21a
1b. This type of packaging box is used for storing relatively heavy contents.

Further, the breaking line and the fold line may be provided in two or more straight lines so that the packaging box in the expanded state can be folded at least three times.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The packaging box of the present invention will be described below in more detail with reference to the embodiment shown in FIGS. In the configuration described below, each part is actually formed integrally by forming a fold on one piece of cardboard paper. The corrugated cardboard paper has a structure in which skin is stretched on both sides of the corrugated paper, and the direction of this corrugation (the direction of arrow F) is referred to as a step 8.

FIG. 1 is an exploded view of the packaging box, which is provided with a bottom surface 1 having four sides, and four side surfaces 2 extending from each side of the bottom surface 1. The opposing side group 21 and the opposing side group 22 are each divided into two so that the side 2 is doubled in the completed state of the box.

That is, the side face group 21 includes the outer side face part 2 adjacent to the bottom face part 1 (continuously provided via the fold line 2a).
1a, an inner side 21b adjacent to the outer side 21a
It is composed of Then, the folds 2b and 2 are formed such that a space corresponding to the thickness of the corrugated cardboard is formed between the outer side surface portion 21a and the inner side surface portion 21b at the time of bending.
b is formed.

Further, the side portion 2 opposed to this is a bottom portion 1
And an inner side surface portion 21d adjacent to the outer side surface portion 21c. Creases 2b, 2b are also formed between the outer side surface 21c and the inner side surface 21d.

On the other hand, the side face group 22 orthogonal to the side face group 21 also has a double structure. That is, the side surface group 22 includes an outer side surface portion 22a adjacent to the bottom surface portion 1 (continuously provided via the fold line 2e) and an outer side surface portion 22a.
And an inner side surface portion 22b adjacent to the inner side. Then, folds 2f, 2f are formed between the outer side surface portion 22a and the inner side surface portion 22b such that a space corresponding to the thickness of the corrugated cardboard is generated at the time of bending.

Further, the side portion 2 facing this is a bottom portion 1
And an inner side surface portion 22d adjacent to the outer side surface portion 22c. And between the outer side surface part 22c and the inner side surface part 22d,
Folds 2f, 2f are formed.

At the outer ends of the inner side surfaces 22b and 22d, there are formed finger hooks 2g and 2g to be used at the time of disassembly. Moreover, the inner side surface parts 22b, 22d
Are formed with two slits 2h at the outer end.

The slit 2h has a structure in which a slit (not shown) is provided on the bottom surface portion 1 and a part of the inner side surface portions 22b, 22d is inserted into the slit to fix the inner side surface portions 22b, 22d. In this case, it is for obtaining an effective elasticity when attaching to and detaching from the slit.

On both sides of the outer side portions 21a, 21c, tongue pieces 2c, 2c inserted between the outer side portion 22a and the inner side portion 22b when the box is completed are formed, respectively.

Reinforcing plates 2d, 2d inserted between the outer side 21a and the inner side 21b when the box is completed are formed on both sides of the inner side 21b, 21d, respectively.

Further, slits 2j, 2j are formed at the base end portions of the reinforcing plates 2d, 2d of the inner side surfaces 21b, 21d.
Are formed respectively. These slits 2j, 2j
When the box is completed, it is locked by protrusions 2k, 2k formed on both ends of the inner side surfaces 22b, 22d, respectively, so as to keep the entire box fixed.

In the unfolded state of the bottom portion 1 and the side portions 2, a perforation line (break line) is provided at a position where the bottom portion 1 and one of the opposing side face groups 21 are bisected in parallel with the step 8. 3 are formed. As shown in FIG. 1, the perforation line 3 is located at a position shifted from the center of the bottom portion 1.

A fold line 4 is formed perpendicular to the step 8 and bisecting the bottom surface portion 1 and the other side surface portion group 22. The fold line 4 is located at the center of the bottom surface 1.

Two engagement portions 5, 6 are formed on the inner side surface portion 21b. The engaging portions 5 and 6 are formed by cutting thick paper (cardboard paper) into an Ω shape. The positions of the engagement portions 5 and 6 are set at positions that are line-symmetric with respect to the perforation line 3. Thus, when the perforation line 3 is bent, the engaging portions 5 and 6 can be engaged.

When assembling the packaging box having the above structure, the side surface 21 is raised at the fold 2a while the inner side surfaces 21b and 21d are folded inward at the fold 2b.
Next, after the reinforcing portion 2d is bent 90 degrees inside together with the tongue piece 2c, the side portion group 22 is raised at the fold line 2e. Further, the tongue piece 2c and the reinforcing portion 2d are folded while the inner side surfaces 22b and 22d are folded inward at the folds 2f.
To the inner side surfaces 22b, 22d and the outer side surfaces 22a, 22
c. At this time, the inner side surfaces 22a, 22
Each of the projections 2k of FIG. 2d engages with the corresponding one of the slits 2j, resulting in the state of FIG.

Next, when this packaging box is disassembled and folded, as shown in FIG. 3, the inner side surfaces 22b and 22d are raised, and the package is brought into the unfolded state shown in FIG. Then, the fold line 4 is bent first to obtain the state shown in FIG. 5, and the perforation line 3 is further bent to obtain the state shown in FIG. Here, since the engaging portions 5 and 6 overlap, the engaging portion 5 is
When it is inserted into the inside of the box and engaged as shown in FIG. 7, the packaging box is fixed in the state of FIG.

By engaging the engaging portions 5 and 6 in this manner, the folding of the packaging box can be prevented, and the outer dimensions can be reduced to approximately one fourth of the unfolded state. Was. In order to increase the effect of preventing unraveling,
The engaging portions 5 and 6 may be set at positions away from the fulcrum (perforation line 3).

[0036]

According to the present invention, in the unfolded state of the box, the outer dimensions are reduced by folding the box from the break line and the fold line and engaging the two engagement portions with each other in a state where the entire box is folded four times. It can be reduced to almost a quarter. For this reason, it is possible to make the packaging box easy to handle in the disposal of the packaging box and the like, and it is possible to improve the work efficiency of the disposal and the like.

Further, a storage box which is easy to handle in disposal or the like can be manufactured at a low cost with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a development view of a packaging box according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state where a packaging box according to an embodiment of the present invention is assembled.

FIG. 3 is a perspective view showing an unfolding process of the packaging box according to the embodiment of the present invention.

FIG. 4 is a perspective view showing an expanded state of the packaging box according to the embodiment of the present invention.

FIG. 5 is a perspective view showing a process of folding the packaging box according to the embodiment of the present invention.

FIG. 6 is a perspective view showing a completed folded state of the packaging box according to the embodiment of the present invention.

FIG. 7 is a perspective view showing the vicinity of an engaging portion of the packaging box according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottom part 2 Side part 3 Break line (perforation line) 4 Break line 5, 6 Engagement part 21 One side group 22 The other side group

Claims (4)

[Claims] 1. A bottom portion having four sides, side portions extending in four directions from the bottom portion, and the bottom portion and one side portion group facing each other in a developed state of the bottom portion and each side portion. A fold line that bisects the bottom surface and the other opposing side surface group; and a two fold line formed on one of the side surfaces of one of the side surface groups and arranged line-symmetrically with the break line. A packaging box comprising: an engagement portion. 2. The packaging box according to claim 1, wherein said break line is formed in parallel with the step of corrugated paper, and said fold line is formed perpendicular to said step. 3. The method according to claim 2, wherein the engaging portions are formed by forming cuts in the corrugated paper, respectively, and are formed at positions apart from each other within a width of the side portion. The packaging box according to claim 1. 4. The apparatus according to claim 1, wherein the fold line is formed in a direction away from a side surface portion on which the engaging portion is formed and at a position away from a center position of the bottom surface portion. A packaging box according to any one of claims 1 to 3.