JPS6131953Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealed container made of plastic.
Recently, sealed containers made of plastic materials have been used to store and preserve foodstuffs and the like. These sealed containers have excellent practical value based on the characteristics of plastic materials, which are light and easy to clean. I'm having problems. Among these, narrow tolerances in the fitting dimensions between the container body and the lid that form a sealed container are a major factor that causes the manufacturing cost of molding molds to rise, and this issue has been addressed from the perspective of reducing manufacturing costs. There is a strong need for a solution.

Accordingly, the main object of the present invention is to find a structure for a sealed plastic container that is economical in operation and can reduce dimensional tolerances during mold making and molding.

Another main object of the present invention is to create a sealed plastic container that has a practically satisfactory seal between the container body and the lid, despite having relatively loose dimensional tolerances. It is about providing.

The object of the present invention is to provide a sealed container made of plastic consisting of a rectangular container body and a lid body fitted to the upper edge of the container body, the lid body being subjected to a pressing force by a cam means described later. a flange curved inwardly having a maximum amount of curvature at the midpoint of each side of the lid when not in use; a pressurizing rib extending radially from the center of the lid toward the midpoint; It has a cam means for projecting the flange outwardly through a compression rib, and a plate-shaped portion that covers the entire opening of the container body, while the inner dimension of the upper end of the side wall of the container body is This can be effectively achieved by the plastic sealed container which is designed to come into close contact with the flange over its entire circumference when the pressing force by the cam means is applied.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In the drawings, Fig. 1 is a top view of the sealed plastic container according to the present invention in a state before applying pressure, and Fig. 2 is a top view of the sealed container taken along the line - in Fig. 1. It is a partially cutaway front view.

In these drawings, the plastic sealed container is formed of a rectangular container body 10 and a lid body 20 fitted to the upper edge of the container body. The lid 20 has an inwardly curved flange 28 which has a maximum amount of curvature at the midpoint of each side of the lid when no pressing force is applied by cam means 24 and 26, which will be described later. A pressurizing rib 22 extending radially from the center toward the midpoint, cam means 24 and 26 that extend outwardly to the flange 28 via the pressurizing rib, and the entire opening of the vessel body 10. It has a covered elongated plate-like portion 21. On the other hand, vessel 10
The inner dimensions of the upper end of the side wall are determined so that the flange 28 comes into close contact with the flange 28 over its entire circumference when the pressing force by the cam means is applied. The cam means is formed of a cam plate 24 rotatably supported approximately at the center of the elongated plate-shaped portion 21 and a knob 26 for rotating the cam plate. After fitting into the opening, by rotating the knob 26 to rotate the cam plate 24 in the direction of arrow A, the pressurizing rib 22 that is slidably engaged with the cam plate 24 is released. arrow
Press in the direction A' to bring the flange 28 and the upper edge of the container body 10 into close contact over the entire circumference. In this way, the minute gap 12 that existed between the flange 28 and the upper edge of the container body 10 when the pressing force by the cam means was not applied disappears when the pressing force is applied, and the container body A hermetically sealed container is formed within the upper edge of the container 10 with the flange 28 of the lid 20 in close contact with the entire circumference. Therefore, it is desirable that the minute gap 12 that exists between the vessel body 10 and the lid body 20 when no pressure force is applied by the cam means be set within a range that can be eliminated by the pressure force alone. .

When removing the lid body 20 from the container body 10, the cam means is rotated in the direction of arrow B to remove the pressure rib 22.
The pressure on the flange 28 is released, and the minute gap 12 is created between the lid body 20 and the container body 10.
By pulling the knob 26 in this state, the lid 20 is removed from the container body 10.

In the embodiment described above, a sealing structure is formed between the container body 10 and the lid body 20 by using the pressure by the pressure ribs 22, but as a modified example, the flange 28 is inserted from the center of the elongated plate-shaped portion 21. It is also possible to form flexible folds (not shown) with a reduced wall thickness that extend radially toward the flange 28, and use the expansion of the folds to help press the flange 28 by the pressurizing rib 22. .

As is clear from the above description, since the present invention uses elastic deformation of the flange portion of the lid to seal the container, there is no need to maintain strict dimensional tolerances as in conventional sealed containers. Therefore, a significant improvement effect is brought about in the reduction of manufacturing costs and the stability of operation.

Furthermore, although the plastic sealed container according to the present invention has a simple structure, it has excellent sealing performance, and therefore the contents can be stored very well.

[Brief explanation of the drawing]

FIG. 1 is a top view of the sealed container before applying pressure, and FIG. 2 is a partially cutaway front view of the sealed container taken along the line - in FIG. 1. 10: vessel body, 24, 26: cam means, 12: minute gap, 28: flange, 20: lid body, 22: pressurizing rib.

Claims (1)

[Scope of utility model registration request] It is a sealed container made of plastic, consisting of a rectangular body and a lid fitted to the upper edge of the container, and when the lid is not pressurized by the cam means described later, each side of the lid is closed. A flange curved inwardly with the maximum amount of curvature at the midpoint, a pressurizing rib extending radially from the center of the lid body toward the midpoint, and a pressurizing rib extending outwardly to the flange via the pressurizing rib. and a plate-shaped portion that covers the entire opening of the container body, and the container body has an inner dimension of the upper end of the side wall of the container body when the pressurizing force by the cam means is applied to the flange. The sealed container made of plastic is characterized in that the plastic container is in close contact with the entire circumference thereof.