JPS5837797Y2 - Adhesion prevention device when stacking containers or lids - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for preventing adhesion when containers or lids are stacked.

Conventional thin sheets of thermoplastic resin such as polyethylene, polypropylene, polystyrene, vinyl chloride, etc.)
(0.1~1.Qmm) formed in vacuum or compressed air,
The container body 1, which is a shallow molded product with a complex shape (depth to width ratio of 0.5 or less), has a peripheral edge 2 or a partition as shown in Figures 1 and 2. A small recess 4 is formed in the rib of No. 3, and the small recess 4 is provided at an asymmetrical position for each container, so that when containers are stacked as shown in Fig. 2, the small recesses 4 of the containers do not overlap each other. It looks like this.

As described above, since the containers can be stacked so that the small recesses 4 do not overlap, the containers can be easily separated without coming into close contact with each other.

However, when forming a large number of containers, it is impossible to make all the small recesses symmetrical.

The same molded product is always formed inside. Therefore, if such identical molded products are overlapped, they will fit closely together, making it difficult to separate them and causing trouble, and if a large number of molded products with small recesses formed in the same position are molded, they will not overlap. Difficult to stack without closely fitting.

This proposal was devised in view of the above points, and
Even if the molded products are stacked, they will not fit closely together, so the ribs on the periphery or middle partition of the container are provided with grooves that are open on both sides and the top, and the grooves are filled with a thin partition film. was formed.

Further, the present invention can be applied to the lid of a container, and a similar groove and a thin film can be formed on the ribs on the periphery of the lid to prevent tight fitting.

According to the proposed method, there is no need to change the position of the recess for preventing close fitting in each molded product, etc., and therefore it is easy to manufacture a molding die, and if necessary, it is possible to use conventional methods. It has the characteristic that it can be used in a variety of ways by using it in combination with.

The following description will be made based on the embodiments shown in FIGS. 3.4 and 5.6.

The peripheral edge part 2 and the outer partition part 3'3' of the illustrated container body 1 are formed into ribs that are hollow and open at the bottom, and a groove 4 is formed in a part of this rib.

The groove 4 is open on both sides and the top, and a partition thin film 5 is formed therein.

Now, as shown in the figure, the thickness of the rib, the depth of the groove 4, and the groove 4
If the medium lengths are a, J), and c, respectively, the depth b is larger than the thickness a and the medium length C, and the ratio of the medium length C to the thickness a is 0.5 to 5 times. It has become.

As described above, the concave groove 4 is formed in the rib, and the partition thin film 5 is formed in the groove.
By forming grooves 4 at the same position, when stacked, the ribs do not fit closely together due to the thin film 5 as shown in FIG. 5, and the ribs can be separated one by one. This makes it easier.

In addition, when the width of the peripheral edge part 2 and the partition part 3 is wide, the rib 6 is formed narrowly as shown in FIG.
It is preferable to provide a groove 4 in the groove and form the thin film 6 therein.

7 and 7' are left and right grooves for forming the narrow ribs 6.

Even in this case, the thin film 5 can prevent adhesion.

The container can be made by vacuum or pressure forming. In this case, the part of the mold corresponding to the area where the thin film 5 is present is a recess having the same shape as the groove 4, and the materials facing each other are sandwiched between the recesses. The thin film 5 is formed by pressing the sheet into the recess by vacuum or compressed air.

In this case, the upper edge of the thin film is depressed in an arc shape, but this does not impair the adhesion prevention function.

The container can also be made by injection molding, in which case the upper edge of the membrane can be straight.

Note that the configuration of the groove 4 and the thin film 5 as described above can also be applied to the lid.

In this case, it will be provided in the ribs around the lid, but it is better to provide the opposing recesses of the grooves 4 in the ribs of the container.

In any case, the present invention has grooves that are open on both sides and above in the periphery of the container body, the ribs of the middle partition, or the ribs of the periphery of the lid, and a thin partition film is formed in the grooves. Therefore, even if the concave grooves are formed in the same position, the containers or lids do not fit tightly together when stacked, and it is easy to separate each container one by one. , the molding die is extremely easy to manufacture.

[Brief explanation of the drawing]

Fig. 1 is a partial slope view of a conventional container, Fig. 2 is a cross-sectional view showing the state when conventional containers are stacked, Fig. 3 is a slope view of the main part of the proposed device, and Fig. 4 is a perspective view of a conventional container equipped with the proposed device. FIG. 5 is a sectional view showing a stacked state, and FIG. 6 is a perspective view showing a modified embodiment of the present device. 1...Container body, 2...Periphery, 3.
...Inner partition, 4...Concave groove, 5...
...Partition thin film.

Claims (4)

[Scope of utility model registration request] (1) In a device in which the peripheral edge and the partition are formed of ribs that are hollow and open at the bottom, the ribs of the peripheral edge or the partition are provided with grooves that are open on both sides and the top; A device for preventing adhesion when stacking containers or lids, comprising a thin partition film formed in the groove. (2) The depth of the groove is larger than the thickness of the rib and the medium length of the groove, and the ratio of the medium length of the groove to the thickness of the rib is 0.5 to
A device for preventing adhesion when stacking containers or lids according to claim 1 of the utility model registration claim, which is 5 times as large. (3) Utility model registration according to claim 1 or 2, in which grooves are provided from both left and right sides in a part of the peripheral edge or the partition, and narrow ribs are formed between the two equal grooves. A device to prevent containers or lids from sticking together when stacking. (4) The container or lid is a vacuum or pressure molded product of a thin sheet of thermoplastic resin, and is constituted by a shallow molded product. A device to prevent containers or lids from sticking together when stacking them.