Pressure state display device

Abstract

A pressure status display device displays whether positive pressure fluid or negative pressure fluid is being supplied in a fluid channel. A fluid guiding member (17) is constructed from a coupling body (11) where a fluid channel (12) is formed and from a partition member (16) provided outside the coupling body (11), and a receiving space (19) is formed by the partition member (16) and the coupling body (11). A pressure chamber (22a) communicating with the fluid channel (12) via a communication hole (23) is formed in the receiving space (19) by a sliding seal member (21) provided in the receiving space (19). When pressure is not being supplied to the fluid channel (12) by a spring member (25), a sliding sleeve (24) is positioned at a non-supply position, and when pressure is supplied, the sliding sleeve (24) moves to a supply position. The pressure status in the fluid channel (12) can be confirmed from the outside by observing the positions of the sliding seal member (21) and the sliding sleeve (24).

Description

Technical field [0001] The present invention relates to a pressure state display device for externally displaying whether a fluid is supplied into a fluid flow path. Background technique [0002] The fluid pressure circuit for supplying compressed air from a compressed air source to a fluid working mechanism such as a pneumatic cylinder is provided with a pressure control valve that adjusts the pressure of the compressed air and a directional control valve that switches the flow path. The control mechanism uses fluid pipes such as pipes for connecting the various components constituting the fluid pressure circuit to each other. In the fluid pressure circuit for supplying the liquid pressurized by the pressurizing source to the fluid pressure operating mechanism, fluid pipes such as pipes for connecting the various components constituting the fluid pressure circuit to each other are also used. A fluid pipe can also be used in a fluid pressure circuit for supplying negative pressur...

AI Technical Summary

Problems solved by technology

[0010] When mounting a plurality of pipe joints on a fluid pressure mechanism, since each pipe joint must be installed while securing the size of the display portion protruding radially outward from the joint body, it is not possible to install multiple pipe joints in a limited space. pipe joints, so that the fluid pressure mechanism equipped with pipe joints has to be enlarged

In order to reduce the size of the display unit and avoid an increase in the size of the fluid pressure mechanism, the displacement of the display member can be set to be small when the pressurized fluid is supplied and when the pressurized fluid is not supplied, but this will make it difficult to confirm visually. If there is fluid, there may be misoperation to pull out the tube from the tube fitting while the pressurized fluid is being supplied.

On the other hand, as described in Patent Document 3, in the case of displaying the pressure state corresponding to the position of the piston, it is necessary to always observe the piston from the outside through a transparent tube, and it is impossible to judge whether the pressurized fluid is is supplied, so there is a problem of poor recognition

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