Valve mechanism for tube-type fluid container

Abstract

A valve mechanism adapted for a fluid-discharging port of a tube-type fluid container, comprising: a valve seat portion 40 having an opening 41 through which a fluid flows; a valve portion 20 comprising a valve body 21 having a shape corresponding to the opening 41, and a shaft 22 connected to the valve body 21 and extending downward from the valve body 21; and a valve support portion 30 comprising: (i) a bottom plate 39 to which a tip of the shaft 22 is connected; (ii) an annular support 35 fixedly connected to the valve seat portion 40; and (iii) multiple connectors 32 connecting the bottom plate 39 and the annular support 31, the connectors 32 elastically urging the bottom plate 39 downward to close the opening 41 with the valve body 21 and being bendable as the bottom plate 39 moves upward and pushes the valve portion 20 to open the opening 41.

Description

technical field [0001] The present invention relates to valve mechanisms, and more particularly to valve mechanisms that can be used in tubular fluid containers. Furthermore, the present invention relates to tubular fluid containers in which fluid is stored. Background technique [0002] The valve mechanism described in Japanese Patent Laid-Open No. 2001-179139 has a spherical valve body, and uses a spring that provides the valve body with momentum toward a valve seat. However, a valve mechanism using a spherical valve body and a spring is expensive to manufacture. [0003] A valve mechanism having a resin valve seat and a resin valve body in a closed position where the valve body contacts the valve seat and an open position where the valve body is separated from the valve seat is commonly used. Move between locations. [0004] Among the resin valve mechanisms, it is preferable that the valve mechanism has a simple structure capable of reliably shutting off the fluid flow...

AI Technical Summary

Problems solved by technology

[0006] In tubular containers using pipes made of synthetic resin, since these pipes made of synthetic resin have elastic recovery force, there arises such a problem that when the pressure is removed after the fluid is discharged by applying pressure to the pipe, the air in the pipe Under the action of the elastic restoring force, the fluid is discharged back from the opening part to the fluid storage part, destroying the quality of the fluid stored in the fluid storage part

[0012] However, the tubular container described in Japanese Patent Laid-Open No. 2000-109103 can only be used for high-viscosity contents because the tubular container does not have a valve mechanism at the discharge port

If low-viscosity fluids are stored in tubular containers, the problem arises that air flows back into the container from the discharge port of the container, resulting in a reduction in the quality of the fluid stored in the container

However, it is difficult to manufacture a tubular container having a valve structure portion provided in its main body portion

In addition, there is a problem that when trying to weld the bottom of a tubular container, the welding cannot be satisfactorily completed due to the presence of the valve structure portion

Images