JPS6131954Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealed plastic container. 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 demand for a solution to this problem.

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 provide a sealed plastic container that has a practically satisfactory seal between the container body and the lid despite having relatively loose dimensional tolerances. It's about doing.

Therefore, these objects of the present invention are a sealed plastic container consisting of a container body and a lid body fitted to the upper edge of the container body, and the lid body is not subjected to any tightening force by the tightening means described later. A flexible plastic sheet forming a very curved edge, two rigid plates sandwiching this plastic sheet from above and below, and when the tightening force is applied, the plastic sheet is held between the rigid plates. clamping means for clamping to flatten the curved edge, while the body has an inclined surface that brings the upper edge into close contact with the flattened edge of the plastic sheet when the clamping force is applied. This can be effectively achieved by the above-mentioned plastic sealed container, which has an inwardly projecting portion at the upper end of the upper edge to prevent the lid from slipping out.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a partially cutaway front view of a sealed plastic container according to the present invention before being tightened. The plastic sealed container of the present invention consists of a container body 10 and a lid body 20 that is fitted onto the upper edge of the container body 10. A flexible plastic sheet 30 forming a curved edge 32, two rigid plates 26 and 28 sandwiching this plastic sheet from above and below, and when the tightening force is applied, the two plastic sheets 30 are clamping means 2 for flattening said curved edge 32 by clamping between said rigid plates 26, 28;
Contains 2,24. In this embodiment, the tightening means consists of a bolt 24 that passes through the plastic sheet 30 and the rigid plates 26, 28, and a nut 24 that threadably engages with the bolt 24, and is rotated in the tightening direction. The rigid plates 26 and 28 are spaced apart and the curved edge 3 of the plastic sheet 30
Flatten 2. In addition to the bolt-and-nut engagement type described above, the tightening means may also be a combination of a rod having a protrusion (not shown) on its peripheral wall and a sleeve-like member that slides on the rod. can. In the case of this second specific example, an L-shaped groove (not shown) for locking the protrusion in a predetermined position is formed on the engagement surface of the sleeve-like member with the rod, and the protrusion is connected to the L-shaped groove. By sliding the sleeve-like member in the axial direction while it is fitted in the groove to generate a pressing force against the plastic sheet, and then rotating the sleeve-like member in a direction perpendicular to the axial direction, the first embodiment is removed. It is possible to obtain the same tightening force as in the example.

On the other hand, the container body 10 is formed with an inclined surface that brings the upper edge 12 into close contact with the flattened edge 32 of the plastic sheet 30 when the tightening force is applied. is provided with an inward projecting portion 14 for preventing the lid 20 fitted to the upper edge from slipping out.

Since the plastic sealed container according to the present invention has the above-described structure, after fitting the lid 20 into the upper opening of the container 10, the plastic sheet 30 can be closed by operating the tightening means. It can be made flat and its edge 32 can be brought into close contact with the upper edge 12 of the container body 10. Further, since the container body 10 is provided with the projecting portion 14, the lid body 20 does not slip out from the container body 10 during use, and the contents can be safely stored.

As is clear from the above description, since the present invention utilizes the elastic deformation of a flexible plastic sheet 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, the plastic sealed container according to the present invention is
Despite adopting a simple structure, it has excellent sealing performance, so the storage stability of the contents is also extremely good.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a sealed plastic container in a state before tightening. 10: Vessel body, 32: Edge, 20: Lid body, 12:
Upper edge of vessel body, 30: Plastic sheet, 14:
The part that extends inward.

Claims (1)

[Scope of utility model registration request] A sealed plastic container consisting of a container body and a lid body fitted to the upper edge of the container body, the lid body forming a curved edge when no tightening force is applied by the tightening means described later. A flexible plastic sheet, two rigid plates sandwiching the plastic sheet from above and below, and when the clamping force is applied, the plastic sheet is clamped between the rigid plates to flatten the curved edge. the container body has an inclined surface that brings the upper edge into close contact with the flattened edge of the plastic sheet when the clamping force is applied; The above-mentioned sealed plastic container is provided with an inwardly projecting portion to prevent the lid from slipping out.