JP2000326959A - Fabricable case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fabricable case which is simply fabricated with cushioning parts being provided therein. SOLUTION: For a fabricable case 10 having cushioning parts 18 for holding an article to be packed, each of the cushioning parts 18 is formed in projection at each of corners at the inside of the fabricable case 10 with each of inner flaps 17 divided into two parts and with each of the divided flaps folded up, and hollows are formed respectively when the inner flaps are folded up and the article to be packed is held with the hollows.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling box for packaging an electronic device or the like to absorb an impact.

[0002]

2. Description of the Related Art Conventionally, in order to protect a packaged object such as an electronic device such as a wireless card writer from external impact and to transport it safely by truck or the like, an assembly box such as a cardboard is used.

[0003] This assembly box has a structure in which a cushioning material is attached to the box body as a separate part. In the configuration in which the cushioning material is attached as a separate part, the cushioning material is attached to the product and then stored in a specified box (JIS-Z-1507: 0201 format), and the cushioning material is attached to a flap portion of the specified box. And a method of storing in an integrated box.

[0004]

However, in a configuration in which the cushioning material is attached to the article to be packaged as a separate component and then stored in the prescribed box, there is a problem that material management and packaging work become complicated. For this reason, there is a problem that the cost of packaging materials is high.

[0005] In addition, the structure in which the box and the cushioning material are integrated has a problem that the manufacturing process of the packaging material is complicated and the material cost is high.

The present invention has been made based on the above circumstances, and an object of the present invention is to provide an assembly box having a buffer portion which can be easily manufactured.

[0007]

According to a first aspect of the present invention, there is provided an assembly box provided with a buffer for holding an article to be packaged, wherein the buffer is an inner flap of the assembly box. It is an assembly box characterized by being formed by.

According to a second aspect of the present invention, there is provided an assembling box provided with a buffering portion for holding an article to be packed, wherein the buffering portion divides the inner flap into two parts and folds each of the divided inner flaps. While protruding at the corners inside,
A concave portion is formed when the inner flap is folded, and an article to be packed is held by the concave portion.

The invention according to claim 3 is the assembly box according to claim 2, wherein the buffer portion is provided on both the upper surface side and the lower surface side inside the assembly box.

According to a fourth aspect of the present invention, the buffer portion is assembled when the inner flap is divided into two on either the upper surface side or the lower surface side inside the assembly box and the divided inner flaps are folded. While protruding at the corner inside the box,
A concave portion is formed when the inner flap is folded, and a first buffering portion for holding a packaged object in the concave portion, and the inner flap is divided into two portions on either the upper surface side or the lower surface side inside the assembly box, and A second shock-absorbing portion which is formed so as to protrude at a corner inside the assembly box when the divided inner flap is folded, and which holds the object to be packed by pressing it from one of the upper surface side and the lower surface side; The assembly box according to claim 2, comprising:

According to a fifth aspect of the present invention, the concave portion is formed by providing a cut and a fold on a surface of the buffer portion opposite to the side surface and the outer flap, and pressing this portion. Item 4. An assembly box according to Item 2.

The invention according to claim 6 is the assembly box according to claim 2, wherein the concave portion is formed by providing a cut and a fold on a side surface of the buffer portion, and pressing this portion.

The invention according to claim 7 is the assembly box according to claim 6, characterized in that the side surface of the recess is cut out so as to open the door.

According to an eighth aspect of the present invention, in the assembly box according to the sixth aspect, the concave portion is cut out so that a side surface of the concave portion is open.

As a result of taking the above measures, the following operation occurs. According to the first aspect of the present invention, since the buffer portion is formed by the inner flap of the assembly box, it is not necessary to provide the buffer portion for holding the article to be packed as a separate component. That is, since the buffer portion is formed by the inner flap, it is possible to solve problems such as the material management and the complexity of the packaging operation that occur when the buffer portion is provided as a separate component.

Further, since the buffer portion is formed on the inner flap, the process for manufacturing the packaging material can be simplified as compared with a configuration in which the assembly box and the buffer portion are simply integrated. .

According to the second aspect of the present invention, the buffer portion is formed so as to protrude at a corner inside the assembly box when the inner flap divided into two is folded, and a concave portion is formed when the inner flap is folded. Therefore, if the article to be packed is inserted and held in the concave portion, the article to be packed can be satisfactorily held while buffering the shock at the buffer portion. That is, if a buffer is provided at a corner inside the assembly box and the corner of the package is held by the buffer, the package can be held satisfactorily.

According to the third aspect of the present invention, since the buffer portion is provided on both the upper surface side and the lower surface side inside the assembly box, it is possible to satisfactorily hold the corner portion of the article to be packed.

According to the fourth aspect of the present invention, a notch and a fold are formed in the first buffer portion to form a concave portion, and in this concave portion, the article to be packed can be removed from either the upper surface side or the lower surface side inside the assembly box. In addition to holding the package, the second buffer holds the packaged object from either the upper surface or the lower surface. It is possible to hold the package well.

According to the fifth aspect of the present invention, the concave portion is formed by forming a cut and a fold on a surface opposite to the side surface of the buffer portion and the outer flap and pressing this portion, so that the concave portion is adjacent to the article to be packed. The object to be packed can be held from three directions: the side surface and the outer flap side surface.

According to the sixth aspect of the present invention, the concave portion is formed by forming a cut and a fold on the side surface of the buffer portion and pressing this portion, so that if the corner portion of the article to be packed is inserted into the concave portion, the concave portion is formed. The package can be held well.

According to the seventh aspect of the present invention, since the side surface of the concave portion is cut out so as to form a double door, it is possible to easily press the concave portion when forming the concave portion.

According to the eighth aspect of the present invention, since the side surface of the recess is cut out so as to make a one-sided opening, it is possible to easily press the recess when forming the recess.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is an exploded view of an assembly box 10 according to the first embodiment of the present invention. FIG. 2 shows a perspective view when the assembly box 10 is assembled.

The assembly box 10 of the present invention is made of, for example, cardboard. The cardboard accommodates a packaged object 11 such as a lightweight and thin electronic device such as a wireless card writer.

The assembling box 10 of the present embodiment is configured to have a flat rectangular shape with a small height when assembled. The assembling box 10 has side portions 13,
14. The side portions 13 and 14 have a first side portion 13 which becomes a long side portion when assembled and a second side portion 14 which becomes a short side portion. These first side portions 1
3 and the second side portion 14 are provided alternately, and the first side portions 13 or the second side portions 14 are provided alternately.
They are provided so that they do not adjoin each other.

An outer flap 15 is provided on the first side surface portion 13.
Are attached to both upper and lower sides. Each of them has the same length, and is provided so as to cover the packaged object 11 from the outside after storing the packaged product 11 therein, thereby protecting the packaged product 11 from impact. A fold line 16 is provided between the outer flap 15 and the first side surface portion 13. The fold line 16 is a portion where the outer flap 15 is mountain-folded and bent from the first side surface portion 13.

The second side surface portion 14 has an inner flap 1
7 is provided via a fold line 16. The inner flap 17 is formed in a buffer portion 18 that holds the packaged object 11 and reduces the impact. That is, by providing a large number of cut lines and bending lines in the inner flap 17, the buffer portion 18 is constituted only by the inner flap 17. In addition,
When the buffer section 18 is configured, the buffer section 18 has a concave portion 19.
Are formed, whereby the corners of the packaged object 11 are held, and the movement of the packaged object 11 is restricted.

The inner flap 17 is provided with a vertical cut line 22 bisecting the inner flap. This vertical cut line 2
A cut is made along the side 2 toward the second side surface portion 14, and then a cut is made along the parallel score line 23 close to the second side surface portion 14. Note that the parallel score line 23 has only a length corresponding to a standing portion 30 described later. That is, the parallel cut line 23 is formed shorter than the vertical cut line 22. Parallel break line 2
3 has a predetermined distance from the second side surface portion 14 and
And is bent so as to be parallel to the side surface portion 14 of the main body.

Continuing from the outer end of the parallel score line 23,
A score line 24 is formed. The score line 24 is
It is formed obliquely so as to go further from the parallel cut line 23 to the second side surface portion 14.

After making a cut along the cut line 24, a cut is made along the indentation cut line 25.
The indentation cut line 25 is a portion that is cut in a U-shape at the center of the expanded buffer portion 18. The indentation cut line 25 is provided so as to be inclined at a predetermined angle with respect to the second side surface portion 14.

At the center of the long side of the pressing break line 25, a triangular pressing break line 26 is provided. The triangular portion pressing break line 26 is provided so as to be orthogonal to the pressing break line 25. After inserting the triangular portion pressing cut line 26, a plurality of bending lines are formed. Among them, the first bending line 27 is provided obliquely to the fold line 16 from the side edge of the inner flap 17 to the second side surface portion 14.

Therefore, as shown in FIG.
The buffer part 18 is folded along. Thereafter, as shown in FIG. 4, first, the inner flap 17 is mountain-folded along the first bending line 27.

Further, a second bending line 28 is provided so as to be in line with the indentation cut line 25. As shown in FIG. 5, the second bending line 28 is also bent so as to make a mountain fold at this portion.

Further, a vertical bending line 29 is provided in a portion adjacent to the cut line 24. The vertical bending line 29 has a configuration in which the cut line 24 side is set as the upright portion 30 by making a mountain fold along the vertical bending line 29.

Further, a horizontal bending line 31 is provided in the direction perpendicular to the cut line 24 and also at the outer edge of the inner flap 17. The horizontal fold line 31 constitutes the upright portion 30 similarly to the vertical fold line 29. Therefore, the vertical fold line 29 and the horizontal fold line 3
A valley fold line 33 is formed at the intersection 32 where the 1 intersects, and the valley fold line 33 forms a vertical fold 29
And the horizontal bent portion 33 are provided so as to intersect at right angles.

The vertical fold line 29 and the horizontal fold line 31 are each mountain-folded, and the intersection 32 is a valley fold line 33.
Is folded so as to be overlapped by two. Thereby, the standing portion 30 is formed.

In this case, the intersection 32 is configured such that the overlapped portion is fixed, for example, by gluing.

As shown in FIG. 5, after the upright portions 30 are formed, the concave portions 19 are formed. The concave portion 19 has bending lines 35 at both ends of the indentation cut line 25. Thereby, these indentation break line 25 and bending line 35
The portion surrounded by is the pushing portion 36. Then, by folding the bending line 35 in a mountain, this portion is cut out.

Further, at the extension side end of the triangular section pressing cut line 26, folding lines 38 and 39 are provided. The folding lines 38 and 39 are provided so as to be orthogonal to each other. Thereby, the triangular portion 40 surrounded by the triangular portion pressing cut line 26 and the folding lines 38 and 39 is bent at the folding lines 38 and 39. That is, the fold lines 38 and 39 are bent so as to make a mountain fold.

As a result, a recess 19 is formed. The concave portion 19 is configured to be pressed down from three directions, that is, the side surface portion adjacent to the corner portion of the packaged object 11 and the upper or lower surface. Thereby, the movement of the packaged object 11 is restricted.

Here, when the object to be packed 11 is pressed, any surface of the object to be packed 11 comes into contact with the object to be packed 11 on the side of the concave portion 19. Thereby, the packaged object 11 is configured to be pressed linearly.

The buffer portions 18 having such a configuration are provided at eight locations corresponding to the corner portions of the article 11 to be packed. For this reason, as shown in FIG.
1 can be held.

According to the assembling box 10 having the above structure, since the buffer portion 18 is formed by using the inner flap 17, it is necessary to provide a separate cushioning material and affix it to the inside of the assembling box 10. Disappears. For this reason, there is an advantage that material management and packaging work can be simplified. In particular, since the buffer portion 18 for holding the article 11 to be packed is formed by using the inner flap 17, the buffer section 18 can be easily formed to hold the article 11 to be packed.

Further, in the configuration in which the box and the cushioning material are integrated,
Although the manufacturing process of the packaging material becomes complicated, the assembly box 10 of the present invention is used.
In this case, the inner flap 17 is bent and manufactured so as to be wound inside the assembly box 10, so that the manufacturing process is not complicated,
It can be easily manufactured.

Further, since the assembly box 10 utilizes the inner flap 17, it is possible to easily perform an operation for manufacturing the buffer portion 18. That is, the buffering portion 18 can be easily manufactured by making a cut line or a fold line in the inner flap 17 of the assembly box 10.

Further, when the concave portion 19 is formed, it is bent because the indentation cut line 25 and the triangular portion indentation cut line 26 are formed and then pushed in by bending along the folding lines 35 and the folding lines 38 and 39. The part that plays the role of a beam that maintains strength. Therefore, the strength of the concave portion 19 can be improved.
That is, the strength can be improved as compared with the case where punching is performed to form the concave portion 19.

Further, at all corners of the assembly box 10,
Since the buffer unit 18 is provided, the packaged object 11
Can be satisfactorily held by the concave portion 19 of the buffer portion 18 and the movement of the packaged object 11 can be restricted.

(Second Embodiment) Hereinafter, a second embodiment of the present invention will be described with reference to FIGS.

The assembly box 50 according to this embodiment has basically the same configuration as that described in the first embodiment. However, in the present embodiment, the shape of the inner flap 51 is different from the configuration described in the first embodiment. Hereinafter, this will be described.

The inner flap 51 of the present embodiment has a structure in which the buffer portion 52 is provided only on the upper (or lower) inner flap 51 as shown in a developed view of FIG.
That is, this portion is the first buffer portion 52a, and the configuration is the same as that described in the above embodiment.

However, the lower (or upper) side
The shape of the inner flap 51 is different from the configuration described in the above embodiment in that the inner flap 51 does not have the concave portion 19. This is the second buffer 52b.

That is, the second buffer portion has a vertical cut line 22 and a parallel cut line 23. Further, it has a first fold line 27 and a second fold line 28, and further has a valley fold line 33 at a vertical fold line 29, a horizontal fold line 31, and an intersection 32 where they intersect. And it is the structure in which the standing part 30 is formed by bending along these.

However, unlike the first buffering section 52a, the second buffering section 52b is bent so that the surface on the side facing the first buffering section 52a holds the article to be packed. It becomes the mounting portion 53. This mounting part 53
Does not restrict the positional deviation by holding the packaged object 11 in the concave portion 19, but merely regulates the placement of the packaged object 11 on the lower surface side and the movement from the upper surface side. And
On the upper surface side, the article 11 to be packed is
Is engaged.

Thus, the article to be packed 11 is sandwiched between the first and second buffer portions 52a and 52b in both the up and down directions.

According to the assembly box 50 having the above structure,
Since the package 11 is held by the concave portion 19 of the first buffer portion 52a and the package 11 is placed on the placing portion 53 in the second buffer portion 52b, the package 11 is
The second buffer 52b has a configuration in which the object to be packed 11 is simply placed and sandwiched between the first buffer 52a and the second buffer 52b. 5
The configuration of 2b can be simplified.

Therefore, the labor for forming the second buffer portion 52b is simplified, and the manufacturing process of the packaging material is simplified, and the cost can be reduced.

(Third Embodiment) Hereinafter, a third embodiment of the present invention will be described with reference to FIGS.

The assembly box 60 of this embodiment is different from the configuration described in the above embodiment in that the inner flap 61a on the upper surface side (or the lower surface side) of the It is configured to cover and close the inside of the assembly box 60.

However, the lower side (or the upper side)
The inner flap 61b is provided with a buffer portion 62 for holding the packaged object 11 and buffering an impact on the packaged object 11.
In addition, the buffer portion 62 is formed by cutting out the concave portion 6.
3 is formed.

A cutout groove 64 is formed in the buffer portion 62 in a direction orthogonal to the second side surface portion 14. Notch groove 64
Is provided so as to extend to an appropriate site. The buffer section 62 is a cut-off section 65 in which a corner of the inner flap 61b is cut off.

Then, the cut-off portion 65 of the inner flap 61
From both ends in the direction perpendicular to the cut-off portion 65.
The fold lines 66 and 67 are provided in the direction toward the side surface portion 14 of FIG. The fold lines 66 and 67 include a first fold line 66 and a second fold line 67, of which the first fold line 66 is close to the second side surface portion 14.
The second fold line 67 is provided so as to be parallel to the first fold line 66. Second fold line 67
Are formed so as to extend to the extension side end of the notch groove 64.

A notch line 68 is provided from the extension side end of the notch groove 64 to the second side surface portion 14 in a direction orthogonal to the first fold line 66 and the second fold line 67. I have. The cut line 68 is formed from the end of the second fold line 67 toward the second side surface portion 14, and from a portion close to the fold line 16, the first fold line 6 is formed.
It is provided so as to be parallel to the fold line 16 toward the sixth side. The end of the cut line 68 extends to the first fold line 66.

After the margin 69 provided on the first side portion 13 is attached to the inside of the second side portion 14, the buffer portion 62 is formed. When forming the buffer portion 62, it is mountain-folded along the first fold line 66. Next, the buffer portion 62 is mountain-folded again along the second fold line 67.

Thereafter, a concave portion 70 is formed. Recess 70
Is formed on the side wall 71 between the first side 13 and the second side 14. In the present embodiment, the recess 70 is formed by cutting out and pushing in only the side wall 71.
In order to form such a recess 70, the first and second
Of the cut line 72 corresponding to the thickness of the article to be packed 11 so as to be parallel to the fold lines 66 and 67 of FIG.
a and 72b are formed.

A cut line 73 perpendicular to both of the cut lines 72a and 72b is formed in the middle of the cut lines 72a and 72b. The cut line 73 is provided so as to connect these two cut lines.

Further, the cut lines 72a, 72b
Fold lines 74a and 74b are provided so as to connect both ends of. A portion surrounded by the cut lines 72a and 72b, the cut line 73, and the fold lines 74a and 74b becomes an open portion 75. For this reason, the folding lines 74a, 7
If 4b is folded in a mountain and the opening 75 is pushed in, the opening 75
Are pushed in with double doors to form the recess 70.

According to the assembling box 60 having the above-described structure, since the recessed portion 70 is provided with the concave portion 70 and the packaged object 11 is held in the concave portion 70, the inner flap 61b
It is possible to efficiently form the buffer portion 62 by utilizing the above. Thereby, it is possible to absorb the impact while holding the packaged object 11.

In this case, the concave portion 70 is opened by the double door opening, and the corner portion of the packaged object 11 is inserted into the recess 70. Therefore, the packaged object 11 can be favorably held with a simple configuration. .

Although the first to third embodiments of the present invention have been described above, the present invention can be variously modified. This will be described below.

In the third embodiment described above, the buffer 62
The opening part 75 of the double door is formed.
The opening 75 is not limited to the double door, and may be a single door. This state is shown in FIGS. In the assembly box 80, an inner flap 81a having a configuration similar to that of the outer flap 15 and a buffer portion 82 that holds the packaged object 11 and buffers an impact on the packaged object 11 are formed.

The cushioning portion 82 forms a U-shaped press cut line 83 on the inner flap 81b, and forms a fold line 84 by connecting the cut ends of the press cut line 83. As a result, this becomes the pushing portion 85, and if the pushing is performed along the fold line 84, the concave portion 86 can be formed here. The other configuration has substantially the same configuration as the configuration described in the third embodiment.

Further, as described in the first to third embodiments, the present invention provides a buffer portion in which folds or cuts are formed in the inner flaps 17, 51, 61a to hold the article 11 to be packed therein. 18, 52b, and 62 are provided. For this reason, even if it has a form other than this, if it can form an assembly box by providing a fold or a cut in an inner flap, it will be included in the concept of the technical idea.

In addition, various modifications can be made without departing from the scope of the present invention.

[0076]

As described above, according to the first aspect of the present invention, since the buffer portion is formed by the inner flap of the assembly box, it is not necessary to provide a separate buffer portion for holding the article to be packed. . That is, since the buffer portion is formed by the inner flap, it is possible to solve problems such as the material management and the complexity of the packaging operation that occur when the buffer portion is provided as a separate component.

Further, since the buffer portion is formed on the inner flap, the process for manufacturing the packaging material can be simplified as compared with a configuration in which the assembly box and the buffer portion are simply integrated. .

According to the second aspect of the present invention, the buffer portion is
When the inner flap is divided into two parts, it is formed so as to protrude at the corner inside the assembly box, and when the inner flap is folded, a concave part is formed. In this case, it is possible to favorably hold the article to be packed while buffering the shock at the buffer section. That is, if a buffer is provided at a corner inside the assembly box and the corner of the package is held by the buffer, the package can be held satisfactorily.

According to the third aspect of the present invention, since the buffer portion is provided on both the upper surface side and the lower surface side inside the assembly box,
It is possible to favorably hold the corner portion of the article to be packed.

According to the fourth aspect of the present invention, a notch and a fold are formed in the first buffer portion to form a concave portion, and the concave portion is used to divide a packaged object into one of the upper surface side and the lower surface side inside the assembly box. And the second buffer unit holds the object to be packed from either the upper surface or the lower surface, so that
Despite the simplified configuration in which the inner flap is provided with a reduced number of recesses, the object to be packed can be held satisfactorily.

According to the fifth aspect of the present invention, the concave portion is formed by providing a cut and a fold on the surface of the buffer portion opposite to the side surface and the outer flap, and pressing this portion.
The object to be packed can be held from three directions, that is, the side surface adjacent to the object to be packed and the surface on the outer flap side.

According to the sixth aspect of the present invention, the concave portion is formed by forming a cut and a fold on the side surface of the buffer portion and pressing this portion, so that if the corner portion of the article to be packed is inserted into the concave portion, Goods to be packed can be held well.

According to the seventh aspect of the present invention, since the side surface of the recess is cut out so as to form a double door, it is possible to easily press the recess when forming the recess.

According to the eighth aspect of the present invention, since the side surface of the concave portion is cut out so as to open one side, it is possible to easily press the concave portion when forming the concave portion.

[Brief description of the drawings]

FIG. 1 is a development view showing a configuration of an assembly box according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the entire configuration of the assembly box according to the embodiment;

FIG. 3 is an exemplary perspective view showing a state before bending a buffer unit according to the embodiment;

FIG. 4 is a view showing a state in which the buffer unit according to the embodiment is bent along a first bending line.

FIG. 5 is a view showing a state in which the buffer portion according to the embodiment is bent along a second bending line and a concave portion is formed.

FIG. 6 is an exemplary perspective view showing a state where the packaged object is held in the assembly box according to the embodiment;

FIG. 7 is a development view showing a configuration of an assembly box according to a second embodiment of the present invention.

FIG. 8 is a perspective view showing a configuration of an assembly box according to the embodiment.

FIG. 9 is a developed view showing a configuration of an assembly box according to a third embodiment of the present invention.

FIG. 10 is an exemplary perspective view showing the configuration of an assembly box according to the embodiment;

FIG. 11 is an exploded view showing a configuration of an assembly box according to a modification of the embodiment.

FIG. 12 is an exemplary perspective view showing a configuration of an assembly box according to a modification of the embodiment.

[Explanation of symbols]

 10, 50, 60, 80: assembly box 11: packaged object 13: first side surface 14: second side surface 15: outer flap 17: inner flap 18, 62: buffer 19: recess 30: standing Part 52a: first buffer part 52b: second buffer part

Claims (8)

[Claims] 1. An assembling box provided with a buffer portion for holding an article to be packed, wherein the buffer portion is formed by an inner flap of the assembly box. 2. An assembling box provided with a buffer portion for holding an article to be packed, wherein the buffer portion is formed at a corner inside the assembly box when the inner flap is divided into two and each of the divided inner flaps is folded. An assembling box, which is formed so as to project and form a concave portion when the inner flap is folded, and holds an object to be packed in the concave portion. 3. The assembly box according to claim 2, wherein the buffer portion is provided on both the upper surface side and the lower surface side inside the assembly box. 4. The corner portion inside the assembly box when the inner flap is divided into two on either the upper surface side or the lower surface side inside the assembly box and the divided inner flaps are folded. A first buffering portion which is formed so as to protrude from the inner flap and which is formed with a concave portion when the inner flap is folded, and which holds the packaged object in the concave portion; When the inner flap is divided into two and the divided inner flaps are folded, they are formed to protrude at the corners inside the assembly box, and hold and hold the packaged object from the other side, either the upper surface or the lower surface. 3. The assembly box according to claim 2, further comprising: a second buffer portion. 5. The recess according to claim 2, wherein a cut and a fold are provided on a surface of the buffer portion opposite to the side surface and the outer flap, and this portion is pressed in.
Assembly box as described. 6. The assembly box according to claim 2, wherein the concave portion is formed by providing a cut and a fold on a side surface of the buffer portion, and pressing this portion. 7. The assembling box according to claim 6, wherein the concave portion is cut out so that a side surface of the concave portion opens. 8. The assembling box according to claim 6, wherein said concave portion is cut out so that a side surface thereof opens in one direction.