JPS6013775Y2 - container - Google Patents

Description

[Detailed description of the invention] This invention relates to containers, particularly tray-shaped or box-shaped containers that are assembled and formed by folding sheet materials. It was made easy.

In the case of containers that are traditionally formed by folding sheet materials, in order to assemble and form the corners of the side walls by folding them in, the material must be flexible and easy to bend, and relatively hard and difficult to bend materials are required. It is very difficult to manufacture the structure when the structure contains the following.

However, in order to obtain a container with excellent strength or rigidity, it is necessary to use a hard sheet, and there is a need for a container that is folded and formed by taking advantage of the advantages of a hard sheet.

Therefore, in this invention, we provide a container that can meet the above requirements, and its structure consists of a relatively hard external synthetic resin foam sheet as a base material and a relatively soft synthetic resin foam sheet on the inside. The container is formed by folding a multilayer sheet made by laminating sheets, and a fold is formed in advance in the relatively hard synthetic resin foam sheet at the folded part between the bottom and side wall of the container, and the fold The side wall is raised up by bending from that part, and at the corner part of the side wall, a cutout is formed in advance only in the hard synthetic resin foam sheet to reach the soft synthetic resin foam sheet part, It is characterized by forming a part of the corner by folding and joining a soft synthetic resin foam sheet at a position corresponding to the cutout part so as to form a double layer.

Next, embodiments of this invention will be illustrated below with reference to the drawings.

The embodiment shown in FIGS. 1 to 3 is a case of a tray-shaped container. First, of the multilayer sheets constituting the container 1, 10 are comparatively hard synthetic resin foam sheets, which serve as the outer sheet, and the foamed Made of material such as polystyrene sheet.

Reference numeral 20 is a relatively soft synthetic resin foam sheet, which serves as the inner sheet, and is preferably made of a flexible and easily bendable material such as a foamed polyurethane sheet.

Of these, relatively hard synthetic resin foam sheet 10
Folds 11 are appropriately formed in the container 1 to facilitate the folding operation when folding and raising the side wall 2 of the container 1 from the bottom 3.

Further, in the portions 4, 4 between the side walls 2, 2 that will be corners when folded, a cutout portion 12 is formed in only the hard synthetic resin foam sheet 10, reaching the soft synthetic resin foam sheet 20, and the side wall When assembling the container 1 by raising the sheet 2 from the bottom 3 and folding in the corner portion 4, the container 1 is formed so that only the soft synthetic resin foam sheet 20 can be bent at locations where sharp bending is required. There is.

That is, in FIG. 3, the corner portion 4 of the soft synthetic resin foam sheet 20 corresponding to the cutout portion 12 of the hard synthetic resin foam sheet 10, which becomes the surplus portion when the four side walls 2 are raised, is double-sided. It is assembled by folding it along the outer surface of the side wall 2 so that it becomes , and attaching it by adhesive or other means.

Next, in the modified example shown in FIGS. 4 to 6, corner portions 4 of the soft synthetic resin foam sheet 20 are folded double, and the cutouts 12 formed in the hard synthetic resin foam sheet 10 are folded. The container 1 is assembled and formed by inserting and pasting between both end faces.

In addition, creases 11' are formed on both ends of the side walls 2, 2 on each side, so that both end surfaces of the cutout part 12 can be easily butted together, so that the corner part 4 of the soft synthetic resin foam sheet 20 can be properly sandwiched. It becomes easier to assemble and has a good appearance.

The above configuration is particularly suitable for a tray-shaped container with a shallow bottom or when the soft synthetic resin foam sheet 20 is thinner than the hard synthetic resin foam sheet 10.

Furthermore, the modified example shown in FIGS. 7 and 8 is for a box-shaped container with a relatively deep bottom. A part of the sheet 10 is folded toward the other side wall 2'', and there is a crease 1 in the hard synthetic resin foam sheet 10.
This degree of bending is sufficiently possible if the corner portion 1 is formed, and this is a suitable implementation that also serves to reinforce the corner portion 4.

Among the materials of the multilayer sheet forming the container 1 as described above, a sheet material made of a foamed polystyrene sheet or the like is preferable as a relatively hard synthetic resin foam sheet because of its excellent cushioning properties, lightness, and strength.

On the other hand, as the relatively soft synthetic resin foam sheet 20, foamed polyurethane, foamed polypropylene, foamed polyethylene, etc. are suitable because they are flexible, easy to bend, and have excellent cushioning properties.

Further, the above-mentioned hard and soft synthetic resin foam sheets are not limited to being made of a single material, but may of course be made of a plurality of laminated materials.

In addition, it is easy to manufacture by using a press machine to trim and crease multiple sheets made of these materials and pasting together hard synthetic resin foam sheets and soft synthetic resin foam sheets that have been cut to a regular length. This makes it suitable for good work efficiency.

According to this invention constructed as described above, even though the container includes a relatively hard synthetic resin foam sheet as a material for forming the container, the bent portion between the bottom and side wall of the container is Creases are formed in the hard synthetic resin foam sheet to facilitate bending, and cutouts are formed in the relatively hard outer synthetic resin foam sheet at the corners that will be folded when folding requires extremely large bends. Therefore, to assemble the corner part, all you have to do is fold in the flexible and easily bendable inner relatively soft synthetic resin foam sheet at the position corresponding to the cutout, which makes the work very easy and improves the appearance. The top is also good.

As for the assembled container, since the entire container is composed of hard and soft synthetic resin foam sheets, the properties of the hard and soft synthetic resin foam sheets as a multilayer sheet can be fully exhibited.

Moreover, since the soft synthetic resin foam sheet at the corner part is double-folded and joined together, the corner part of the container becomes even more solid, especially since the soft synthetic resin foam sheet has no breaks and is integrated into one piece. Therefore, if this soft synthetic resin foam sheet is made of a water-impermeable material, it will be suitable as a container for storing foods with a high water content, as there will be no water leakage from the corners.

In addition, when it comes to manufacturing containers, compared to molded products, equipment such as molding plates and molds is not required, and there is no need to apply heat as in heat molding, so even heat-resistant synthetic resin materials are not a problem. It is also possible to overcome the drawbacks of conventional molded products, such as being able to be used without any problems, and it can improve the performance and expand the range of uses as foldable containers.

[Brief explanation of the drawing]

The figures illustrate the embodiment of this invention, and Fig. 1 is a bottom view before assembly, Fig. 2 is a sectional view taken along line n-■ from the previous time, and Fig. 3
The figure is a perspective view during assembly, Figure 4 is a bottom view of the modified example before assembly, Figure 5 is a perspective view after assembly, Figure 6 is an enlarged view of a part of the corner, and Figure 7 is a further modified example. FIG. 8 is a bottom view before assembly, and a perspective view during assembly. 1...Container, 2.2', 2''...Side wall, 3.Curve/bottom, 4...Part of corner, 10
...Hard synthetic resin foam sheet, 11.11'
, 11''...Fold line, 12...Deletion, 20...Soft synthetic resin foam sheet.

Claims (1)

[Scope of utility model registration request] A container formed by folding a multi-layer sheet made by laminating an outer relatively hard synthetic resin foam sheet serving as a base material and a relatively soft synthetic resin foam sheet serving as an inner material, the bottom and side walls of the container being folded. Folds are formed in the relatively hard synthetic resin foam sheet in advance at the portions, and the side walls are raised by bending from the creases, and furthermore, at the corners of the side walls, the hard foam sheet is pre-formed. Only the synthetic resin foam sheet has a cutout that reaches the soft synthetic resin foam sheet, and the soft synthetic resin foam sheet at the position corresponding to the cutout is folded and joined in a double layer to form a corner. A container characterized by forming a part.