JPH1143135A - Bottom cover for packing case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bottom cover for a packing case which can be easily assembled and separated to respective kinds of materials. SOLUTION: Extended parts 6 with notches 61, stretched from the four sides 7a of the bottom face 7 are formed at respective sides and a plurality of folding lines 6a, 6b, 6c parallel to the four sides of the bottom face are formed at the extended parts and the extended parts are folded inward one after another along the folding lines to form side walls 8. And slits 8c parallel to these sides of the bottom face are formed on the inside faces 8b of respective side walls and cut and erected parts 9 parallel to these sides of the bottom face are formed on the bottom face 7 and the cut and erected parts 9 are inserted in the slits 8c and fixed to the side walls. In this way, respective side walls can be vertically held and such a problem that the external case can not be put on the bottom body because the side walls are opened when the external case is put thereon, can be solved. And the bottom cover for packing case can be easily assembled and separated to respective kinds of materials.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom cover for a packing box, and more particularly to a fixing device for fixing a side wall vertically without using a staple, an adhesive or the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 5 and 6, packing of heavy goods such as an air conditioner or an electric refrigerator is performed by styrofoam along an opposing wall in a corrugated paper box 1 having an open top. A pair of cushioning materials 2 are fixed to the bottom surface and the wall by bonding to form a bottom cover for a packing box, and the article 3 to be packed is placed on the cushioning material 2 and the lower part is opened from above. Box 4 is attached and band 5 is hung. However, in this method, it takes time and labor to bond and form the bottom cover for the packing box, which is costly. In addition, such a packaging box becomes unnecessary once the equipment is installed, and it is required to separate the material by separating the adhesive upon disposal. For this reason, as shown in FIG. 7, it has been conceived that the corrugated paper box 1 is fixed with staples 11 and the cushioning material 2 is disposed therein. It had been.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a bottom cover for a packing box which is easy to assemble and can be separated for each material.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is characterized in that a pair of cushioning materials are arranged along opposing side walls and a bottom surface of a box having an open top. From each side of the bottom surface, an extended portion having a cutout on one side of each side is formed by extending, and a plurality of folding lines parallel to each side of the bottom surface are provided in each extended portion, and the extended portion is formed. The portion is sequentially bent inward from the folding line to form a side wall, and an inner wall surface of each side wall is provided with a slit parallel to each side of the bottom surface, while the bottom surface is cut and raised parallel to each side of the bottom surface. A bottom cover for a packing box was formed by forming a part and inserting the cut-and-raised part into the slit to lock.

[0005] The notch is provided on both sides of one opposing side wall, and is not provided on the other opposing side wall. Further, the cutout portions are provided at adjacent one end portions of each side wall.

Further, a plurality of slits and cut-and-raised portions corresponding to the respective side walls are formed.

Further, the cut-and-raised portion is formed at a position where the inner wall surface rises. Further, the cut-and-raised portion is formed by providing a projection at a side end to be locked to a side end of the slit. Further, the cut and raised portion was formed by cutting and raising from the center of the bottom surface to the outside. Further, the cut and raised portion was formed by cutting and raising from the outside of the bottom surface to the center side.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, in the packing box bottom cover of the present invention, the box body is formed by extending the extending portion having the notch on one side of each side from the bottom side. A plurality of fold lines parallel to each side of the bottom surface are provided on each extension, and the extension is sequentially bent inward from the fold line to form side walls, and the inner wall surface of each side wall is formed. While providing a slit parallel to each side of the bottom surface, while forming a cut and raised portion parallel to each side of the bottom surface on the bottom surface,
Since the cut-and-raised portion is formed by being inserted into the slit and locked, each side wall can be held vertically.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a bottom cover for a packaging box according to the present invention. FIG. 1 is a development view showing an embodiment of a bottom cover for a packing box according to the present invention, FIG. 2 is a development view showing another embodiment, and FIGS. 3 and 4 are main parts corresponding to FIG. 1 or FIG. It is the assembled plan perspective view and principal part sectional drawing. As shown in FIG. 5 described in the section of the prior art,
It is formed by arranging a pair of cushioning members 2 made of styrene foam or the like along the opposing side walls and the bottom surface of the box body 1 having an open top surface. Since FIG. 5 has already been described, the description is omitted.

In the embodiment shown in FIGS. 1 and 3, extending portions 6 having cutouts 61 on one side adjacent to each other extend from each side 7a of the bottom surface 7, and each of the extending portions 6 Each side 7a of the bottom surface 7
And a plurality of fold lines 6a, 6b, 6c parallel to
a, 6b, and 6c, which are sequentially bent inward from the outer wall surface 8a,
Further, the side wall 8 composed of the inner wall surface 8b is formed. The inner wall surface 8b is formed with a slit 8c parallel to each side 7a. On the other hand, in the vicinity of each side 7a of the bottom surface 7 of the box body 1 and at the rising portion of the inner wall surface 8b, a cut-and-raised portion 9 parallel to each side 7a is cut and raised from the outside of the bottom surface 7 to the center side. On both sides of the cut-and-raised portion 8, projections 9a are formed which are engaged with the side portions of the slit 8c.

In the case of the embodiment shown in FIGS. 2 and 4,
From each side 7a of the bottom surface 7, there is provided an extension portion 6 provided with a cutout 61 on one of both opposing sides, and each extension portion 6 has a plurality of folding lines 6a parallel to each side 7a of the bottom surface 7. , 6b, and 6c, which are sequentially bent inward from the folding lines 6a, 6b, and 6c to form a side wall 8 including an outer wall surface 8a and an inner wall surface 8b. The inner wall 8b has the sides 7a.
Is formed to be parallel to the slit 8c. On the other hand, in the vicinity of each side 7a of the bottom surface 7 of the box body 1, and at the rising portion of the inner wall surface 8b, a cut-and-raised portion 9 parallel to each side 7a is provided.
Is formed by cutting and raising outward from the center of the bottom surface 7, and projections 9 a are formed on both side ends of the cut and raised portion 8 so as to be engaged with the sides of the slit 8 c.

Next, the procedure for assembling the box 1 with the above configuration will be described. First, the folding line 6 of the extension 6
a is bent inward and upward to form an outer surface 8a, and the fold lines 6b and 6c are sequentially bent inward to form an inner surface 8b. Next, the cut-and-raised portion 9 cut and raised from the bottom surface 7 is inserted into a slit 8c formed in the inner side surface 8b and locked, whereby the side wall 8 including the outer side surface 8a and the inner side surface 8b is vertically fixed. I am trying to. At this time, the projection 9a formed on the cut-and-raised portion 9 is locked to the side of the slit 8c to prevent the cut-and-raised portion 9 from coming off. In the case of FIGS. 1 and 3, the cut-and-raised portion 9 is cut and raised from the outside to the center side, and is fitted into the slit 8c. In the case of FIGS. 8c
Therefore, the side wall 8 can be twisted and firmly erected by the return force of the cut-and-raised portion 9.

[0013]

As described above, according to the bottom cover for a packing box of the present invention, the box body is formed by extending the extending portion having the cutout on one side of each side from each side of the bottom surface. A plurality of fold lines parallel to each side of the bottom surface are provided on each extension, and the extension is sequentially bent inward from the fold line to form side walls, and the inner wall surface of each side wall is formed. While providing a slit parallel to each side of the bottom surface, while forming a cut and raised portion on the bottom surface parallel to each side of the bottom surface, the cut and raised portion is formed by inserting and locking the slit. Providing a bottom lid for a packing box that can hold each side wall vertically, solves the problem that the side wall cannot be opened and covered when covering the outer box, is easy to assemble, and can be separated for each material. can do.

[Brief description of the drawings]

FIG. 1 is a development view showing one embodiment of a bottom cover for a packing box according to the present invention.

FIG. 2 is a development view showing another embodiment of the bottom cover for a packing box according to the present invention.

FIG. 3 is a view corresponding to FIG. 1 of a bottom cover for a packing box according to the present invention, wherein (A) is a plan view of a main part assembly, and (B) is A of (A).
It is -A sectional drawing.

FIG. 4 is a view corresponding to FIG. 2 of the bottom cover for a packing box according to the present invention, wherein (A) is a plan view of a main part assembly, and (B) is A of (A).
It is -A sectional drawing.

FIG. 5 is a cross-sectional view showing the entire packaging box according to the related art and the present invention.

FIG. 6 is a sectional view showing a conventional bottom cover for a packing box.

FIG. 7 is a cross-sectional view showing another example of the conventional bottom lid for a packing box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottom cover 2 Buffer material 3 Non-packing material 4 Outer box 5 Band 6 Extension part 6a, 6b, 6c Folding line 61 Notch part 7 Bottom 7a Side 8 Side wall 8a Outer wall surface 8b Inner wall surface 8c Slit 9 Cut part 9a Projection

Claims (8)

[Claims] 1. A device in which a pair of cushioning members are arranged along opposing side walls and a bottom surface of a box body having an open top surface, wherein the box body is notched to one side of each side of the bottom surface from each side thereof. The extended portion having a portion is formed by extending, and each extended portion is provided with a plurality of fold lines parallel to each side of the bottom surface, and the extended portion is sequentially bent inward from the fold line to form a side wall Then, while providing a slit parallel to each side of the bottom surface on the inner wall surface of each side wall, forming a cut and raised portion parallel to each side of the bottom surface on the bottom surface, and inserting the cut and raised portion into the slit. A bottom cover for a packing box, wherein the bottom cover is formed by locking. 2. The bottom cover for a packaging box according to claim 1, wherein the cutouts are provided on both sides of one of the opposed side walls, and are not provided on the other of the opposed side walls. 3. The bottom cover for a packaging box according to claim 1, wherein the cutouts are provided at adjacent one ends of the respective side walls. 4. The bottom cover for a packing box according to claim 1, wherein a plurality of slits and cut-and-raised portions corresponding to the respective side walls are formed. 5. The bottom cover for a packaging box according to claim 1, wherein the cut-and-raised portion is formed at a position where the inner wall surface rises. 6. The bottom cover for a packing box according to claim 1, wherein the cut-and-raised portion is formed at a side end thereof with a projection which is engaged with a side end of the slit. 7. The bottom cover for a packaging box according to claim 1, wherein the cut-and-raised portion is formed by cutting and raising from the center of the bottom surface to the outside. 8. The bottom cover for a packaging box according to claim 1, wherein the cut-and-raised portion is formed by being cut and raised from the outside of the bottom surface to the center side.