JP2534135Y2 - Bottom lid for packing box - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing box, and more particularly to a bottom cover.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a package of heavy goods such as an electric refrigerator is provided with a pair of polystyrene foam cushioning materials along opposing walls in a bottom cover 1 made of corrugated paper having an open top. 2 is fixed to the bottom surface and the wall by bonding, and the articles 3 are placed on the cushioning material 2 and covered with an outer box 4 whose lower part is opened, and a band 5 is hung thereon. However, since such equipment does not require a packaging box once it is installed, a cheaper packaging box is required. A box was required.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide an inexpensive packing bottom lid which can be easily disassembled for each material.

[0004]

In order to solve the above-mentioned problems, in the present invention, a pair of cushioning members are provided along opposing side walls and a bottom surface of a box having an open top surface. A groove is provided at the end of the cushioning material, and a protruding piece extending in the front-rear direction is provided on the side wall, and the front and rear walls extend upward,
An extension piece for holding the cushioning material inserted in the groove is provided, the extension piece being longer than the depth of the groove, and having a portion having substantially the same width at the interval between the cushioning materials. I have.

[0005]

The projecting piece is bent and inserted between the cushioning material and the front and rear walls, and the extension piece is bent and aligned along the upper surface of the cushioning material, and the tip is inserted into the groove. According to the above configuration, the cushioning material is fixed to the bottom lid without bonding.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an embodiment of a packing bottom cover according to the present invention; FIG. FIG. 1 is an assembly view of an embodiment of the present invention, FIG. 2 is a development view of a corrugated paper for a bottom cover, and FIG. 3 is a sectional view taken along line AA of FIG. In FIG. 1, a bottom cover 1 is a box having an open top surface, and a pair of cushioning materials 2 is disposed along opposing side walls 6 and a bottom surface 7. The cushioning material 2 is made of, for example, polystyrene foam, and is formed into a rectangular parallelepiped and has an upper surface 2a on which the bottom of the article 3 is placed, and a concave portion 2b for accommodating a projection fixed to the bottom, and a corrugated cardboard at its end. A groove 2c having a width slightly larger than the thickness of the paper is provided orthogonal to the longitudinal direction. The side wall 6 is provided with a protruding piece 6a extending in the front-rear direction, and the front and rear wall 8 is provided with an extension piece 9 extending upward and having a bent portion 9a bent inward in the middle.
The extension piece 9 has a convex shape above the bent portion 9a, the length of the short portion on both sides is made substantially the same as the depth of the groove 2c, the width is made substantially equal to the width of the cushioning material 2, and Is made substantially the same as the height of the cushioning material 2, and the width is made equal to the distance between the two cushioning materials 2.

In FIG. 2, the bottom cover 1 is assembled by cutting and bending corrugated paper having the required strength. In order to form a box having an open top, a bottom 7 is provided at the center, side walls 6 are provided at the left and right, and front and rear walls 8 are provided at the top and bottom.
1 is provided. The side wall 6 extends downward to form a projecting piece 6a, and the front and rear walls 8 extend downward to form an extending piece 9, and valley fold lines 12, 13 are provided respectively. The extension piece 9 is provided with a valley fold line 14 that is parallel to the valley fold line 13, and the interval between the valley fold line 13 and the length from the end face of the cushioning material 2 to the groove 2c is approximately twice the thickness of the corrugated paper, The length from the valley fold line 14 to the tip is almost the same as the height of the cushioning material 2, and cutouts are provided on the left and right of the lower end. The width of the notch is made equal to the width of the cushioning material 2, and the width of the portion sandwiched between the two notches is made equal to the distance between the two cushioning materials 2. In addition, the length of the portion left between the valley fold line 14 due to the notch is made the same as the depth of the groove 2c.

Referring to FIGS. 1 and 2, the bottom cover 1 and the cushioning member 2 are assembled into a box having an opening at the top by folding along the valley fold lines 10 and 11. The protruding piece 6a is bent along the valley fold line 12 and put inside the front and rear walls 8, and the cushioning material 2 is inserted along the bottom surface 7, the side wall 6, and the protruding piece 6a. Next, the extension piece 9 is bent at substantially 90 degrees by the valley fold line 14, the extension piece 9 is bent inward by the valley fold line 13, and the tip is inserted into the groove 2c.

Since the bottom cover 1 according to the present invention is assembled as described above, as shown in FIG.
And between the front and rear wall 8 and the extension piece 9 together with the cushioning material 2 via the through hole. Further, the portion sandwiched between the notches of the extension piece 9 maintains the space between the two cushioning members 2, thereby forming a bottom lid for a packing box that is strong against external force.

[0010]

[Effects of the Invention] As described above, in the present invention, the cushioning material is fixed only by bending the bottom lid, so that material costs and labor costs associated with bonding as in the conventional example are omitted. The cost can be reduced, and the cardboard paper and the styrofoam can be separated simply by being dismantled, so that it is possible to easily cope with separate collection.

[Brief description of the drawings]

FIG. 1 is an assembly view of a bottom cover for a packing box according to the present invention.

FIG. 2 is an exploded view of the corrugated cardboard of the bottom lid for the packing box according to the present invention.

FIG. 3 is a sectional view of a main part of the bottom cover for a packing box according to the present invention;
2 shows an AA cross section of FIG. 1.

FIG. 4 is a sectional view of a packing box according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottom cover 2 Buffer material 2c Groove 6 Side wall 6a Protrusion piece 7 Bottom surface 8 Front and rear wall 9 Extension piece 9a Bent part

Claims (1)

(57) [Scope of request for utility model registration] A pair of cushioning materials are provided along a side wall and a bottom surface of a box body having an open top surface, wherein a groove is provided at an end portion of the cushioning material, and the side wall is formed in a front-rear direction. An extending piece is provided, and an extending piece that extends upwardly on the front and rear walls and is inserted into the groove to hold the cushioning material is provided. The extending piece is longer than the depth of the groove, and the gap between the cushioning materials is provided. A bottom cover for a packing box, characterized by comprising a portion having substantially the same width as the above.