JPH0212202Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is equipped with a partition to separate two types of goods, especially those that are likely to be crushed or deformed when subjected to external force, such as food (grilled seaweed, etc.). This invention relates to a film bag particularly suitable for storage.

2. Description of the Related Art Film bags equipped with partitions and used to separately store foodstuffs and the like are already known from Japanese Utility Model Application No. 60-105377. This type of bag generally has two
A partition film is inserted between the two outer films, and they are connected to each other at the other edges except for the upper opening side. The partition film is formed of only one sheet.

Problems to be Solved by the Invention Although the conventional bag has the advantage that it can be easily manufactured by simply stacking three sheets and wrapping the three edges,
When articles are placed in the two compartments, each article is pressed inwardly by the outer film. At that time, since there is only one thin partition film between the two, if the items to be stored are easily crushed or deformed, they may come into contact with each other due to sliding contact or pressure between the adjacent items. receive damage. The damage is further increased when these bags are stacked or transported.

An object of the present invention is to solve the above-mentioned drawbacks of the conventional technology while suppressing cost increase by using a simple buffer zone as the partition.

Means for Solving the Problems In the present invention, as a simple buffer zone, the middle partition film is formed by upper and lower narrow partition films and a double inner film connecting the middle. A small amount of air was sealed inside.

Function The bag body has two outer films and a middle partition film connected to each other at the other edges except for the upper opening side, so there are two storage spaces on both sides of the middle partition film. The shape of the vertical cross section of the bottom of the section is
It inevitably becomes wedge-shaped. When an article is placed in these storage sections, the article is pushed into the wedge-shaped bottom by its own weight, and tends to push the outer film and inner film outward. Specifically, since the outward expansion of the outer film is structurally limited by itself, the two articles tend to push the inner film outwardly, ie, toward the other article.

At this time, the force pushing the inner film outward is effectively absorbed by the air layer remaining enclosed within the inner film while deforming the double inner film. This action is performed in the same way in both the left and right storage compartments, so
For example, an article stored on the left side will not hit an article stored on the right side and deform or break it.

Embodiments Examples of the present invention will be described with reference to the accompanying drawings.

The bag body 1 is constructed by interposing a partition film 3 between two outer films 2, 2, and connecting the other edges except the upper opening 6 side, that is, both side edges 5, 5 and the lower edge 4, to each other. It is formed by In the case of the inner partition film 3 shown in FIGS. 2 and 3, a double inner film 14 is connected under the upper narrow partition film 12a, and a lower narrow partition film 12b is connected below it. The fourth
5, the double inner film 14 is connected under the upper narrow partition film 18, and the lower narrow partition film 17 or 19 is connected below it.
It is connected to. It is desirable that the width of each partition film be narrower when the size of the items to be stored is small. Then, some air is left sealed inside the double inner film 14. Its overall structure is best shown in FIG. As the material of the bag body 1, materials such as polyethylene and polypropylene can be used.

This bag can be manufactured by various methods, but it can be mass-produced very easily and at low cost by using any of the following methods.

A method for manufacturing bags individually and continuously will be explained.

First, a long tube having the cross section shown in FIG. 3 is extruded by inflation molding.
Then, as shown in the figure, the outer circular film 1
0 and the inner circular film 11 are combined with the partition films 12a and 12b in the diametrical direction, and the partition film 12
A protrusion 13 is formed on one side of the partition film 1.
A male claw 8 and a female claw 6 are integrally formed on the inner surface of the outer circular film 10 at positions equidistant from the joining point a between the outer circular film 10 and the outer circular film 10.

The partition film 12a, which is a tube-like film having the above-mentioned cross-sectional shape, is cut with a special cutter at a position b near point a, using the protrusion 13 as a reference, and the outer circular film 10 is cut with respect to the partition films 12a and 12b.
While bending the outer circular film 10, the outer circular film 10 is cut with a special cutter at a position a near point b using the protrusion 13 as a reference, and the chuck 7 is engaged with the inner circular film 11 by folding it into a flat shape from both sides. This becomes the inner film 14. In addition, when folding, the inner film 14 is flattened to such an extent that some air remains enclosed within the inner film 14, as shown in the figure. The inner film 14 forms the middle partition film 3 together with the partition films 12a and 12b, and the chuck 7 is located above the upper end by L, and the outer circular film 10 becomes the outer film 2.

Bag body 1
After forming the side edges 5, 5 by vertically welding them at regular intervals corresponding to the width of the outer circular film 10, the upper end portion (the second
A desired bag body 1 is obtained by cutting the portion (broken line portion in the figure) to form an opening 6, and cutting the center of the welded portion in the vertical direction.

The distance L between the upper end of the partition film 3 and the chuck 7 can be easily changed by adjusting the amount of air fed into the inner circle film and changing its diameter during inflation molding (for example, by changing the diameter of the inner circle film). film 1
It can be made shorter by enlarging the straight shape of 1, and longer by making the diameter smaller)
However, it can be adjusted within a certain range by changing the position of the cutter cutting point b.

A method for manufacturing two bags simultaneously and continuously will be explained. First, a long tube having the cross section shown in FIG. 4 is extruded by an inflation molding method. Then, as is clear from the same plane, the two inner circular films 16 in the outer circular film 15 are joined by the partition films 17, 18, 19 in the diametrical direction, and the outer circular film 16 on the diameter perpendicular to the partition film 18 is connected. A pair of male claws 8 are provided on the inner surface of the outer circular film 15 at positions a certain distance from the two points d and e on the circular film 15, respectively.
and a female claw 9 are integrally formed, and a pair of protrusions 13 are integrally formed on the partition film 18.

While bending the outer circular film 15 to the partition films 17 and 19, cut the partition film 18 at the center point f using a special cutter, and as shown in FIG. , so that some air remains enclosed within the flattened inner film 14.
When folded, the inner circular film 16 becomes a flat, hollow inner film 14, and the outer circular film 15 becomes an outer film 2. This state is similar to that of two flat films shown in FIG. Equivalent to. This flat continuous film is welded vertically at regular intervals to form side edges 5, 5, and cut at the center h and at the center of the welded portion downward to form an opening 6. , the desired bag body 1 can be easily obtained.

Effects of the Invention According to the present invention, articles are separated and stored separately by the hollow partition film, so that they do not damage each other due to sliding contact or pressure. Since the partition film only contains air, it can be freely deformed according to the shape of the article with appropriate elasticity, thereby eliminating damage to the article.
Even when a large number of bags containing articles are stacked or transported, the hollow partition film acts as a buffer zone, greatly reducing damage to the articles. Of course, the partition film itself will not be damaged or have holes. In addition, since the middle part of the partition film is only doubled, the material cost does not increase so much, and the structure is simple and can be easily manufactured using the manufacturing method described above. Costs can be kept low.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of an embodiment of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a long piece of continuous extrusion molded by the inflation molding method. FIG. 4 is a cross-sectional view of another long tube-like film, and FIG. 5 is a cross-sectional view of another long tube-like film.
This figure is a cross-sectional view of the tube-shaped film of FIG. 4 cut at point f and folded into a flat shape. 1... Bag body, 2... Outer film, 3... Inner partition film, 4, 5... Edge, 6... Opening.
12a, 18... upper partition film, 12b, 1
7 or 19...Lower partition film, 14...Inner film.

Claims (1)

[Claims for Utility Model Registration] In a bag body in which a partition film is inserted between two outer films and are connected to each other at the other edges except for the upper opening side, the partition film is placed on top. 1. A bag having an inner partition, characterized in that it is formed of a narrow lower partition film and a double inner film connecting the middle thereof, and a small amount of air is left sealed in the inner film.