JPH0510889Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement in a synthetic resin container that is composed of a body and a cover, which are joined together and subjected to internal pressure.

[Conventional technology]

As a filter for passing liquid or gas, a filter is used in which a filter is disposed within a body and a cover, as shown in, for example, Japanese Utility Model Application No. 161414/1983. The container for this filter had a structure in which the body and cover were detachable so that it could be replaced as needed when the filter became clogged and reached the end of its service life.
In order to reduce the trouble of replacing the overbody and the dirt on workers during the replacement work, the body and cover are made of resin, the overbody is placed inside, and the gap between the body and cover is protected from ultrasonic waves, vibrations, etc. The entire filter is replaced by joining by friction welding. To show the specific structure, as shown in Fig. 4, flange parts 2 and 5 are provided at the joint parts of the body 1 and cover 4, and they are joined by friction welding or thermal welding, and the joined flange parts 2 and 5 are A method of caulking is adopted with an annular reinforcing member 20 having a U-shaped cross section that covers the top, bottom and side surfaces.

[Problem that the invention attempts to solve]

However, resin containers generally have lower rigidity than metal containers and are more susceptible to deformation due to internal pressure, particularly the thin body side walls, which swell into a sagging shape. As a result, the flange surface, which is perpendicular to the body side wall, is no longer able to maintain its flat surface, and a force acts to cause the inner periphery to dent, gradually weakening the joint between the flanges of the body and cover from the inner periphery. It peels off and eventually reaches the outer periphery, causing liquid leakage. At this time, even if there is an annular reinforcing member with a U-shaped cross section that covers the top, bottom, and side surfaces of both flanges, the inner peripheral part of the annular reinforcing member is weak against forces acting in the vertical direction, and the inner peripheral part of the annular reinforcing member The gap increases, and the peeling force from the inner circumferential portion between the flanges of the body and the cover is not effectively acted upon.

[Means for solving problems]

A cup-shaped synthetic resin body having a flange portion at the open end and a synthetic resin cover having a flange portion are joined by bringing both flanges into contact,
In addition, in the synthetic resin container provided with inlet and outlet holes, a cylindrical annular reinforcing member is closely attached to the outer periphery of the body.

[Effect]

When the pressure of a fluid such as liquid or gas exerts force inside a container, the container tends to expand outward due to the pressure, but an annular reinforcing member installed on the side wall of the body prevents the body side wall from expanding. prevent and maintain the initial state. Therefore, the flange portion of the body also maintains a flat surface, and as a result, there is no peeling force between the flanges of the cover. The bonded state also maintains its initial state.

〔Example〕

An embodiment will be described using an example in which the present invention is applied to a filter. In FIG. 1, the synthetic resin container of the present invention includes a body 1, a cover 4, and an annular reinforcing member 7.
It consists of The body 1 has a cup shape with one end open and the other end closed, and a flange portion 2 at the open end.
is provided with an inlet hole 3 at the closed end. The cover 4 is dish-shaped and has a flange portion 5 on the outer periphery.
It has an outlet hole 6 in the center. The flange portion 5 is
The inner and outer diameters of the flange portion 2 of the body 1 are the same.
The body 1 and cover 4 are made of a synthetic resin material such as tetrafluoroethylene resin or polypropylene resin, which has excellent chemical resistance. The flange portion 2 of the body 1 and the flange portion 5 of the cover 4 are brought into contact with each other and are joined by friction welding using vibration or ultrasonic waves. Further, above the outer periphery of the body 1, an annular reinforcing member 7 made of metal or resin is provided. The annular reinforcing member 7 has a cylindrical shape and is in close contact with the outer periphery of the body 1.

In such a synthetic resin container, a filter member 8 made of a resin with excellent chemical resistance is disposed inside the container, thereby forming a synthetic resin filter.

Fluid entering the synthetic resin container from the inlet hole 3 of the synthetic resin filter is passed through the filter member 8 and flows outward from the outlet hole 6. Although the side wall of the body 1 is subjected to a force that tends to swell due to the pressure of the fluid, the annular reinforcing member 7 that is in close contact with the outer periphery of the body 1 prevents the swell of the body. Therefore, the flange portion 2 of the body 1 maintains its initial state, that is, a flat surface.

2 and 3 show other embodiments, in which the one in FIG. 2 connects the U-shaped cross section member shown in FIG. 4 and the annular reinforcing member 7 shown in FIG. 1. , a cylindrical annular reinforcing member 10 is used, and the one shown in FIG. A cylindrical annular reinforcing member 11 provided with ribs 12 is brought into close contact with the reinforcing member 11. In the one shown in FIG. 3, the annular reinforcing member 11 is prevented from falling off. In these filters, even if the internal pressure of the fluid builds up in the resin container, the annular members 10 and 11 that are in close contact with the outer periphery of the body keep the body 1
It has the effect of suppressing the force that tends to cause the flange portion 2 to swell, and suppressing the peeling force of the joint surface of the flange portion 2.

[Effect of idea]

As described above, the present invention has excellent sealing performance because the cylindrical annular reinforcing member closely attached to the outer periphery of the body prevents the body from expanding outward even when internal pressure is applied to the synthetic resin container. Brings a container made of synthetic resin.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of a synthetic resin container of the present invention, FIGS. 2 and 3 are other embodiments, and FIG. 4 is a partial sectional view of a conventional synthetic resin container. DESCRIPTION OF SYMBOLS 1...Body, 4...Cover, 2, 5...Flange part, 7, 10, 11... Annular reinforcing member.

Claims (1)

[Scope of utility model registration request] A synthetic resin container in which a cup-shaped synthetic resin body having a flange at the open end and a synthetic resin cover having a flange are joined with both flanges abutting each other, and having entry and exit holes. A synthetic resin container comprising a cylindrical annular reinforcing member closely attached to the outer periphery of the body.