JPS6116993Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a corrugated cardboard box, and is intended to increase strength such as compressive strength without increasing the amount of corrugated paper used to make up the box.

Conventionally, the side walls of a cardboard box were formed by cutting a long piece of corrugated paper into a rectangular shape of a predetermined size and folding it. Only the portions of the inner flap and outer flap that are butted and folded are overlapped.

Such a cardboard box does not have sufficient strength against compressive force applied from above and below the box. Therefore, when packing specified storage items,
Not only cannot the stored items be reliably protected against external impacts, but even when stored in a warehouse or the like, a large number of items cannot be stacked on top of each other, which is disadvantageous in terms of storage space.

Therefore, in order to increase the compressive strength of a corrugated box as mentioned above, conventionally, reinforcing members to strengthen the side walls were placed inside the box, or the material that made up the box itself had sufficient strength. is used.
As a result, it is not only difficult to assemble the box, but also the number of component parts increases, and the cost of materials and assembly inevitably increases.

Therefore, the following configuration is proposed as one that is easy to assemble and provides sufficient compressive strength without increasing the number of constituent materials.

FIG. 1 shows a developed view of the corrugated box proposed here, and this corrugated box has a piece of corrugated paper 1 obtained by cutting a long corrugated paper material into a rectangular shape. It consists of This corrugated paperboard 1 is used so that the corrugations of the corrugated core material are arranged in parallel in the length direction, that is, in a row in the height direction of the side walls, which will be described later.

First, second, third, and fourth side walls 5, 6, 7,
8 in series, and each of these side walls 5, 6, 7,
Fold lines 9, 10, 11, 12, 13 above and below 8.
Inner flaps 17, 18 via 14, 15, 16
and 19, 20 and outer flaps 21, 22 and 2
3 and 24 are installed in succession. At the side edge of the fourth side wall 8, there is a connecting piece 2 that connects the fourth side wall 8 and the first side wall 5 when folded to form the box body 25.
6 are connected to each other via a fold line 27.

In addition, a box body 25 is formed on the inner flaps 17, 18 and 19, 20 which are arranged above and below the first and third side walls 5, 7.
18, 19, 20 with these inner flaps 17, 1
8, 19, 20 are bent along the inner surfaces of the first and third side walls 5, 7, which are arranged in a row, and the fold line can be bent substantially parallel to the first and third side walls 5, 7, respectively. 28, 29 and 30, 31 are provided. These fold lines 28, 29 and 30, 31 are
the first and third side walls 5, 7 and each inner flap 17;
Fold lines 9 and 11 connecting 18, 19, and 20
and 13, 15 by at least the thickness of the corrugated paperboard 1, and each of the above fold lines 9, 11 and 13,
15 is provided in parallel.

Furthermore, from the above-mentioned respective fold lines 28, 29 and 30, 31 of the inner flaps 17, 18 and 19, 20 provided with fold lines 28, 29 and 30, 31, the free end side tips of the inner flaps 17, 18 and 19, 20 are The length L ₁ leading to the side walls 5, 6, 7, 8 is equal to the height H, and the outer flaps 21, 22 and 23,
The length L ₂ of 24 is 1/2 of the width W of each inner flap 17, 18 and 19, 20. As long as this relationship is maintained, the inner flaps 17, 18 and 1
Length L ₁ from fold lines 28, 29 and 30, 31 of 9, 20 and outer flaps 21, 22 and 23, 2
The relationship between the length L ₂ of 4 is changed as appropriate, and the length L ₁ of the inner flaps 17, 18 and 19, 20 is changed as appropriate.
The length of the outer flaps 21, 22 and 23, 24
It may be made longer or shorter than _L2 .

The corrugated paperboard 1 configured as described above has the first, second, third and fourth side walls 5, 6, 7, 8 folded along the fold lines 2, 3, 4, and the fourth side wall 8
The connecting pieces 26 connected to the first and fourth side walls 5 and 8 are bent along the fold line 27 and joined to the side edges of the first side wall 5 with glue or staples.
are connected to form a box body 25 as shown in FIG. And fold lines 28, 29 and 30, 31
Each inner flap 17, 18 and 19, 20 provided with
are bent along the fold lines 9, 11 and 13, 15, which are the continuous parts to the first and third side walls 5, 7, and the first and third side walls are bent along the fold lines 28, 29 and 30, 31. Bend it toward the inner side of the third side walls 5 and 7. Then, the first and third side walls 5, 7
The inner flaps 17, 18 and 19, 20 arranged above and below are overlapped and bent approximately parallel to the first and third side walls 5, 7, respectively, as shown in FIG. At this time, if the upper inner flaps 17, 18 of the first and third side walls 5, 7 are bent so as to overlap the lower inner flaps 19, 20, the opening on the insertion side of the stored article Inner flap 19,
Since the ends of the flaps 20 are not exposed, it becomes easy to insert the stored articles, and the inner flaps 17, 18 and 19, 20 can be easily supported by the stored articles. Then, each outer flap 21, 22 and 23, 24 is attached to the fold line 10, 12 and 14, 24.
By folding it along the lines, the lower and upper lids can be closed.

The portions of the opposing first and third side walls 5, 7 of the corrugated box constructed as described above extend from the fold lines 28, 29 and 30, 31 of the inner flaps 17, 18 and 19, 20 to be folded. Since the length L ₁ is the same as the height H of the first and third side walls 5 and 7, each inner flap 1
7, 18 and 19, 20 are located in parallel, and as shown in FIG. 4, it is constructed as if three sheets of corrugated paperboard were stacked one on top of the other. Furthermore, the first and third side walls 5, 7 and each inner flap 17, 18 and 19,
20 is a waveform 33 of a core material 32 constituting corrugated paperboard
are arranged in a row in the height direction of the box body 25.
Therefore, sufficient strength can be obtained against compressive pressure from the vertical direction of the box body 25, and so-called compressive strength can be increased.

According to the above-mentioned corrugated cardboard box, sufficient strength can be obtained against compression pressure applied from the top and bottom of the box body 25, but the present invention further proposes a corrugated box that can provide sufficient strength of the box body 25. This was devised by focusing on the cushioning body disposed inside the box body 25.

FIG. 5 shows an embodiment of the present invention, in which a buffer body 41 formed of a cushioning material such as styrofoam is installed in a box body 25, and first
The compressive strength of the third side walls 5 and 7 is increased.

As shown in the exploded view shown in FIG. 6, the cardboard box shown in FIG. , 7 are provided with fold lines 28 and 29 that can be bent substantially parallel to the first and third side walls 5 and 7, respectively, when folded along the inner surfaces of the first and third side walls 5 and 7, respectively. These fold lines 2
8 and 29 are also spaced apart from the fold lines 9 and 11 connecting the inner flaps 17 and 18 to the first and third side walls 5 and 7 by at least the thickness of the corrugated paperboard 1. installed in parallel. Then, the length _l1 of the inner flaps 17, 18 having these crease lines 28, 29 extending to the free end side tips of the crease lines 28, 29 is determined by When the first and third side walls 5 and 7 are bent toward the inner surfaces, the engaging portion 4 provided at the upper end of the buffer body 41 disposed on the box body 25
2, 42, the rising wall 43 is formed to a length that allows the tip portions 17a, 18a to engage with each other, or is provided with the engaging portions 42, 42 of the buffer body 41,
The height h of 43 is set to be long enough for the tips 17a and 18a of the inner flaps 17 and 18 to engage with each other. That is, as shown in FIG. 5, the buffer body 41 has a shape of approximately U that can be disposed from the lower lid of the box body 25 to the middle part of the inner surfaces of the opposing side walls 5 and 7.
It is formed into a letter shape.

When the cardboard box constructed in this manner is folded and assembled, the rising wall of the buffer body 41 extends from the upper opening end of the opposing first and third side walls 5 and 7, as shown in FIG. 43, 43 has a double structure in which the inner flaps 17, 18 and the first and third side walls 5, 7 are overlapped, and together with the buffer body 42, the compressive strength of the box body 25 is increased. Can be done. The outer flaps 21, 22, 23, 24 in this embodiment have a length such that their ends are brought together as shown in FIG. 7 when the lid is closed. Wrap portion 45 provided on other outer flap 22
The lid can be locked by wrapping it around the lid.

According to the present invention as described above, it is possible to construct a cardboard box that can increase compressive strength without increasing the number of constituent materials or deteriorating assembly workability, and can reliably protect stored items. .

In particular, since the present invention uses a shock absorber housed within the box body, the high compressive strength of the shock absorber can be utilized, resulting in a corrugated cardboard box with extremely high compressive strength.

[Brief explanation of the drawing]

FIG. 1 is a developed view showing a cardboard box prior to the present invention, FIG. 2 is a perspective view of the box body formed, FIG. 3 is a perspective view of the assembled state, and FIG. 3 is a sectional view taken along line A-A in FIG. 3.
FIG. 5 is a sectional view showing one embodiment of the present invention, FIG. 6 is a developed view thereof, and FIG. 7 is a plan view of the lid closed state. 1... Corrugated paper, 2, 3, 4... Fold line for connecting side walls, 5... First side wall, 6... Second side wall, 7... Third side wall, 8... Fourth side wall, 1
7, 18, 19, 20...inner flap, 21, 2
2, 23, 24...Outer flap, 25...Box body, 28, 29, 30, 31...Fold lines provided on the inner flap.

Claims (1)

[Claims for Utility Model Registration] First, second, third, and fourth side walls are arranged in a row at the center of a rectangular corrugated paperboard through a fold line, and the first, second, third, and fourth side walls are arranged in a row at the center of a rectangular corrugated paperboard, and the fold lines are formed at the top and bottom of each side wall. The inner flaps and outer flaps are arranged alternately, and each of the side walls is folded along the fold line, and the first and fourth flaps are connected through a connecting piece provided on one of the first and fourth side walls. It has a box main body formed by connecting fourth side walls, and a substantially U-shaped buffer body disposed from the lower lid side of the box main body to the middle part of the opposing side walls. , an engaging part is provided at the upper end of both rising walls of this shock absorber, and the inner flap is bent along the inner surface of the side wall which is connected to the inner flap provided on the upper side of the side wall of the box body. Sometimes, a crease line that can be bent approximately parallel to this side wall is provided, and the inner flap is folded along this crease line so as to be approximately parallel to this side wall toward the inner surface of the side wall to which this inner flap is connected. A cardboard box that is bent and has its tip engaged with an engaging portion of the above-mentioned shock absorber.