JP2002145331A - Packing box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a manufacturing cost and recycle a corrugated fiberboard in a packing box comprising a frame formed of the corrugated fiberboard and a sheet member made of a synthetic resin which are integrated. SOLUTION: The packing box 1 comprises a frame 2 formed of a corrugated fiberboard as a material in a form of a frame and a sheet member 3 made of a flexible polypropylene wherein the member 3 is integrally formed with a connection 3b having a U-shaped cross section continuously from a periphery of a base 3a. The connection 3b is fitted into the frame 2 for integration, thereby placing the base 3a of the sheet member 3 in the interior of the frame 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing box used for packing various products.

[0002]

2. Description of the Related Art When transporting various products such as electric equipment for vehicles, in order to prevent the target products from being damaged,
Generally, products are transported in a state of being stored in a packing box.

FIG. 6 is a perspective view of a conventionally known packing box, and FIG. 7 is a sectional view taken along the line BB of FIG. 6. As shown in these figures, the packing box 10 is formed of a frame. 11 and a sheet member 12. The frame body 11 is made of, for example, a double-faced cardboard in which liners are attached to both sides of a wavy center core, and is formed by assembling the cardboard into a frame shape. The sheet member 12 is formed by forming a synthetic resin film into a concave shape, and a flange portion 12a extending outward is integrally formed on the upper edge thereof.
Is attached to the upper surface of the frame body 11 with an adhesive.

In the packaging box 10 constructed as described above, since the bottom surface of a sheet member 12 made of a synthetic resin film is laid inside a frame 11 formed in a frame shape by corrugated cardboard, the product P is placed on the sheet member. The product P can be held on the bottom surface of the sheet member 12 by being inserted into the inside from the upper opening of the sheet member 12. Therefore, if the packing box 10 is transported in a state of being put in a not-shown decorative box or the like, the packing box 10
Can be prevented from being damaged during transportation.

[0005]

In the above-mentioned conventional packing box 10, the frame 11 made of cardboard and the sheet member 12 made of a synthetic resin film are integrated with each other.
It has an advantage that the target product P can be stably packed. However, since the flange 12a of the sheet member 12 is attached to the upper surface of the frame body 11 with an adhesive, the manufacturing cost is reduced by the attaching process and equipment. There was a problem of rising.
In addition, when the sheet member 12 is stained or damaged by use, it becomes difficult to separate the sheet member 12 from the frame 11, and as a result, it is difficult to recycle the cardboard, which is the material of the frame 11. There was another problem.

[0006] The present invention has been made in view of such a situation of the prior art, and an object of the present invention is to provide a packaging box which is inexpensive and in which cardboard can be recycled.

[0007]

According to the present invention, a connecting portion having a U-shaped cross section is integrally formed on a sheet member, and the connecting portion is fitted into a frame to be integrated. With this configuration, the sheet member attaching step and its equipment are not required, so that the manufacturing cost can be reduced, and the sheet member and the frame can be easily separated as necessary. Therefore, it becomes possible to recycle the cardboard which is the material of the frame.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a packing box according to the present invention, a sheet member made of synthetic resin in which a frame having a corrugated cardboard formed in a frame shape and a connecting portion having a U-shaped cross section continuously formed integrally from a peripheral portion of a bottom surface. And the connection portion is fitted into the frame body to be integrated so that the bottom surface of the sheet member is laid inside the frame body.

In the packaging box constructed as described above, the bottom surface of the sheet member is laid inside the frame simply by fitting the connecting portion having a U-shaped cross section formed integrally with the sheet member into the frame. Therefore, the step of attaching the sheet member and its equipment are not required, and the manufacturing cost can be reduced accordingly. Further, since the sheet member and the frame can be easily separated as needed, the cardboard, which is the material of the frame, can be recycled.

In the above construction, the material of the sheet member is not particularly limited, but it is preferable to use a soft polypropylene having excellent workability and high elastic strength.

[0011] In the above structure, the depth dimension from the top surface to the bottom surface of the connection portion of the sheet member is L1, the height dimension of the side surface of the product stored inside the sheet member is L2, and the top surface of the frame body is L2. When the width dimension is L3, it is preferable to set these dimensions so as to satisfy (L1−L2) <L3. With such a dimension setting, for example, the packing box is dropped and the product is placed in the lateral direction. When an external force is applied, the side surface of the product does not directly hit the upper surface and the inner wall surface of the frame, so that the cushioning effect is increased and the product can be reliably prevented from being damaged. At that time, when the thickness of the cardboard is T,
It is preferable to set (L1−L2) ≧ 2T, whereby it is possible to reliably prevent the side surface of the product from directly colliding with the upper surface of the frame.

[0012]

Embodiments will be described with reference to the drawings.
FIG. 1 is a perspective view of a packing box according to an embodiment, and FIG.
FIG. 3 is an exploded perspective view of the packing box, and FIG.
Is an exploded view of a frame provided in the packing box, and FIG. 5 is an explanatory view when the packing box is dropped.

As shown in FIGS. 1 to 3, a packing box 1 according to the present embodiment comprises a frame 2 made of double-faced corrugated cardboard with liners affixed to both sides of a wavy core, and a sheet made of soft polypropylene. This packing box 1 is composed of
After the product P is stored in the sheet member 3, the product P is transported or stored in a state of being put into a not-shown decorative box or the like.

The frame 2 is formed in a frame shape as a whole.
Four rectangular outer surfaces 2a and four triangular inner surfaces 2
b are continuous on the flat upper surface 2c. The frame 2 having such a shape is obtained by first punching a corrugated cardboard as a material into a shape as shown in FIG. 4 and then folding each part along a dashed line in FIG. The sheet member 3 is formed in a concave shape as a whole, and a connecting portion 3b having a U-shaped cross section is continuously formed integrally from four sides of a rectangular bottom surface 3a upward. In the case of the present embodiment, a sheet of polypropylene as a material is heated and pressed by a vacuum forming machine to form the sheet member 3 into a predetermined shape in advance, and then the connection portion 3b of the sheet member 3 is fitted to the frame 2. By being integrated, the bottom surface 3 a of the sheet member 3 is laid inside the frame 2. It is also possible to cover the frame 2 in a state where the polypropylene sheet is heated by using a vacuum forming machine and form the sheet member 3 into a predetermined shape by using the frame 2 as a molding die. If you do
The sheet member 3 can be put on the frame 2 simultaneously with the forming.

The product P is inserted into the packing box 1 from the upper opening of the sheet member 3 and held on the bottom surface 3a. At this time, as shown in FIG. Depth dimension (length from the top surface to the bottom surface 3a of the connection portion 3b)
Is L1, the height of the side surface of the product P is L2, and the width of the upper surface 2c of the frame 2 is L3.
The length is set to be longer than L2 within a range not exceeding 3, that is, a value that satisfies the relationship of (L1−L2) <L3. In the case of the present embodiment, the value of (L1−L2) = X is about 2 to 3 times the thickness T of the corrugated cardboard, which is the material of the frame 2, in other words, the depth dimension L1 of the sheet member 3 is The height L2 is set to a value obtained by adding a dimension approximately two to three times the thickness T of the cardboard.

According to the packing box constructed as described above, the connection portion 3b having a U-shaped cross section formed integrally with the sheet member 3 is simply fitted into the frame member 2, and the sheet member is inserted into the frame member 2. 3
Since the bottom surface 3a can be laid, the step of attaching the sheet member and the equipment required in the related art can be omitted, and the manufacturing cost can be reduced accordingly. In addition, since the sheet member 3 is not bonded to the frame 2 and the sheet member 3 and the frame 2 can be easily separated as necessary, the cardboard as a material of the frame 2 can be recycled. Will be possible.

Further, since the depth L1 of the sheet member 3 is set to a value obtained by adding a height L2 of the side surface of the product P to a dimension approximately two to three times the thickness T of the cardboard, FIG. For example, as shown in FIG.
When an external force in the lateral direction acts on the internal product P, the product P
Does not hit the upper surface 2c of the frame 2 directly, and the upper surface 2c of the frame 2 functions like a support rod, and an excess portion (a portion corresponding to the dimension X) of the sheet member 3 Since the product P is stretched to absorb the impact of the product P, the side surface of the product P does not directly hit the inner wall surface of the frame 2, so that the cushioning effect is increased and the product P can be reliably prevented from being damaged.

[0018]

The present invention is embodied in the form described above and has the following effects.

A connecting portion having a U-shaped cross section is integrally formed on the sheet member, and this connecting portion is fitted into the frame to be integrated, whereby the bottom of the sheet member is laid inside the frame. With this configuration, the step of attaching the sheet member and its equipment become unnecessary, and the manufacturing cost can be reduced accordingly, and the sheet member and the frame can be easily separated as necessary. In addition, it becomes possible to recycle cardboard, which is a material of the frame.

[Brief description of the drawings]

FIG. 1 is a perspective view of a packing box according to an embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an exploded perspective view of the packing box.

FIG. 4 is a development view of a frame provided in the packing box.

FIG. 5 is an explanatory view when the packing box is dropped.

FIG. 6 is a perspective view of a packing box according to a conventional example.

FIG. 7 is a sectional view taken along line BB of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packing box 2 Frame 2a Outer side surface 2b Inner side surface 2c Top surface 3 Sheet member 3a Bottom surface 3b Connection part P Product

Claims (4)

[Claims] 1. A frame member in which a corrugated cardboard is formed in a frame shape, and a synthetic resin sheet member in which a connection portion having a U-shaped cross section is continuously and integrally formed from a peripheral portion of a bottom surface, wherein the connection portion is formed by A packing box, wherein a bottom surface of the sheet member is laid inside the frame by being fitted and integrated with the frame. 2. The packing box according to claim 1, wherein the sheet member is made of soft polypropylene. 3. The sheet member according to claim 1, wherein a depth dimension from an upper surface to a bottom surface of the connection portion of the sheet member is L1, and a height dimension of a side surface of a product stored inside the sheet member is L1. L2, wherein the width of the upper surface of the frame is L3, these dimensions are set so as to satisfy (L1-L2) <L3. 4. The packing box according to claim 3, wherein, when the thickness of the cardboard is T, (L1-L2) ≧ 2T is satisfied.