JPH1086929A - Corrugated fiberboard box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a corrugated fiberboard box which is easy to pack and unpack even for a heavy product and is inexpensive. SOLUTION: The corrugated fiberboard box 11 has a movable side wall 13. The movable side wall 13 is provided continuously with one of adjacent side walls 14 and is separate from the other side wall 16 and a bottom 12. Tabs 13c, 13d are provided at a free end rim 13a and a lower rim 13b of the movable side wall 13. Slits 16b, 12b are formed at a folding position of fold pieces 16a, 12a formed continuously with the side wall 16 and the bottom 12, respectively. The movable side wall 13 is rotated as shown by an arrow to be closed, and the tabs 13c, 13d are inserted into and engaged with the slits 16b, 12b respectively for assembling the corrugated fiberboard box 11. While the movable side wall 13 is open, a product can be received at the time of packing and the product can be taken out at the time of unpacking, wherein operation is easy even if the product is heavy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cardboard box suitable for use as, for example, a packing box for heavy products.

[0002]

2. Description of the Related Art As shown in FIG. 4, a general cardboard box has a rectangular bottom portion 1, four side walls 2, and a bendable flap 3 provided continuously on the upper edge of each side wall 2. As shown in FIG. Although this cardboard box 4 is used, for example, when this cardboard box 4 is used as a packing box for a display monitor, the cardboard box 4 of this kind is usually small because the weight of a large model is so heavy that it is not easy to remove it from the box when unpacking. Used only for models.

FIG. 5 shows a conventional cardboard box used for packing a heavy display monitor. This cardboard box 5 has a shallow lower box 6 with an open upper side,
When the product is packed, the product is stored in the lower box 6 and then the upper box 7 is covered. A plastic joint 8 is fitted into 6a, 7a and a lock operation is performed to connect the lower box 6 and the upper box 7 together. In addition,
The joint 8 has a frame shape and can be inserted with a hand, and also functions as a handle during transportation. Note that the cardboard boxes 4 and 5 are usually closed with tapes or staples after the products are stored and closed.

[0004]

As described above, the cardboard box 4 shown in FIG. 4 is not suitable for a heavy product. On the other hand, the cardboard box 5 shown in FIG. 5 is easy to store a heavy product and take it out when unpacking, but the cost is high because a plastic joint is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks. Even if the product is a heavy product, it is easy to store the product in packing and take out the product in unpacking.
Moreover, it is an object of the present invention to provide a low cost cardboard box which does not require a plastic joint or the like.

[0006]

According to the present invention, there is provided a cardboard having a rectangular bottom, four side walls, and a bendable flap continuously provided on an upper edge of each side wall. In the box, one adjacent side wall is provided with a movable side wall which is continuous to bendable and is separated from the other side wall and the bottom, and a tongue piece is attached to a free edge and a lower edge of the movable side wall, respectively. A slit for inserting each tongue piece of the movable side wall is formed at a bending position of a folded piece formed and continuously formed on the other side wall and the bottom.

According to a second aspect of the present invention, in the cardboard box according to the first aspect, a corner of the upper edge portion of the movable side wall on the free end side of the movable side wall is cut off linearly or obliquely in an arc shape. I do.

According to a third aspect of the present invention, in the cardboard box of the first aspect, two opposing side walls are movable side walls.

[0009]

FIG. 1 is a block diagram showing an embodiment of the present invention.
3 will be described with reference to the embodiment shown in FIG. FIG. 1 shows a first embodiment of the present invention.
Has a rectangular bottom 12 and four side walls 13, 14, 15,
16 and bendable flaps 17, 18, 19, provided continuously on the upper edge of each side wall 13, 14, 15, 16.
20. In this embodiment, the side wall 13 is a movable side wall. That is, the movable side wall 13 is continuous with the adjacent one side wall 14 so as to be able to bend, and is separated from the other side wall 16 and the bottom portion 12. Then, the free edge 13a and the lower edge 1 of this movable side wall
3b, tongue pieces 13c and 13d are formed on the other side wall 1b.
Folding pieces 16a, 12a are formed continuously with the bottom 6 and the bottom portion 12, and slits 16c, 12c for inserting and engaging the tongue pieces 13c, 13d are formed at the bending positions of the folding pieces 16a, 12a. . In addition, the movable side wall 1
The flap 17 at the upper edge of the cutout 3 has a corner portion on the free edge side of the movable side wall cut out in, for example, an arc shape (an arc-shaped notch edge is indicated by 17a). The cutout may not be circular but may be cut straight and diagonally. The tongue pieces 13c, 1
As shown in FIG. 2, when 3d has a slightly enlarged shape on the distal end side, it is difficult for the 3d to come off from the engaged slits 16b and 12b.

When packing a product such as a display monitor using the cardboard box 11, the product is stored in the box with the movable side wall 13 opened as shown in FIG. 1, and then the movable side wall 13 is closed by turning. , The tongue pieces 13c, 13d are inserted into slits 16b, 12b
To engage. In this case, the corner of the flap 17 is cut out in an arc shape (notch edge 17a).
Therefore, when the movable side wall 13 is rotated, the flap 17 does not become an obstacle. Then, as in the case of the conventional cardboard box packaging, final fastening is performed using tape, staples, or the like.

At the time of the above-mentioned product packing, the movable side wall 13 is in an open state, so that even a heavy product can be easily stored in a box. When the product is unpacked, the operation is the reverse of the above-described packing operation. After the tape or staple is removed, the movable side wall 13 is opened, and the product in the box is taken out. Also in this case, the product can be taken out from the opened side, so that even a heavy product can be taken out easily.

FIG. 3 shows another embodiment of the present invention. In the cardboard box 21 of this embodiment, the side wall 15 facing the movable side wall 13 in the cardboard box of FIG. 1 is also a movable side wall. That is, the cardboard box 21 has two movable side walls 13, 15 '. The movable side wall 15 'and the flap 19' at the upper edge thereof are the same as the movable side wall 13 or the flap 17, respectively, and the detailed description is omitted.

In this cardboard box 21, when the movable side walls 13, 15 'on both sides are opened, the other two side walls 14, 16 are opened.
After placing the product on the bottom 12, the side walls 14, 16 are raised, and then the movable side walls 13, 1
By packing 5 ', the product can be packed. Therefore, the storing operation of the heavy product is further facilitated. It is also easy to remove heavy products when unpacking the product. In addition, in the cardboard box 21 of FIG.
Although 3 and 15 'are provided on both sides of one side wall 14, for example, one movable side wall 15' may be provided continuously with the other side wall 16.

[0014]

According to the present invention, since a part of the side wall is a movable side wall, even when the product weight is heavy, the work of storing the product at the time of packing the product and taking out the product at the time of unpacking the product can be performed. It will be easier. Also, since a plastic joint is not required, the cost of the cardboard box can be reduced. There are no joints and no plastic parts are discarded, which is an improvement from an environmental point of view.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cardboard box according to a first embodiment of the present invention before being assembled.

FIG. 2 is an enlarged view of a tongue piece in the cardboard box of FIG.

FIG. 3 is a perspective view showing a state before assembling a cardboard box according to a second embodiment of the present invention.

FIG. 4 is a perspective view of a conventional cardboard box before packing.

FIG. 5 is a perspective view of another conventional cardboard box before packing.

[Explanation of symbols]

 11, 21 cardboard box 12 bottom 13, 15 'movable side wall 14, 15, 16 side wall 17 flap 17a inclined edge 18, 19, 20 flap

Claims (3)

[Claims] 1. A cardboard box having a rectangular bottom, four side walls, and a bendable flap continuously provided on an upper edge of each of the side walls, one of the adjacent side walls being capable of being bent. With a movable side wall that is continuous and separate from the other side wall and bottom,
A tongue piece is formed on each of the free edge and the lower edge of the movable side wall, and a slit for inserting each tongue piece of the movable side wall is formed at a bending position of a folding piece continuously formed on the other side wall and the bottom. A cardboard box characterized by the following. 2. The cardboard box according to claim 1, wherein a corner portion of the flap at an upper edge portion of the movable side wall on a free end side of the movable side wall is cut off linearly or obliquely in an arc shape. 3. The cardboard box according to claim 1, wherein two opposing side walls are said movable side walls.