Joint for resin pipe

Abstract

A joint for resin pipes, comprising: a joint body (1) having a joint barrel (10); a locking mechanism (20); a sealing body (50); indicator (60); cylindrical cover (40). The locking mechanism (20) includes: a main ring body (25); and an angular tooth portion (22) arranged on the annular convex portion (21) of the connecting cylinder portion 10. The cylindrical cover (40) has a transparent cover body (42) and a band ring (43) preventing the cover (42) from expanding and deforming. The indicator (60) has the insertion length of the resin tube (100) from the initial position fitted on the main ring body (25) to the stepped annular surface (11) at the root of the connecting cylinder (10). Set the effect at the appropriate value. In the present invention, by studying the locking mechanism and the like for preventing the resin tube from slipping, it can exert a high anti-slip performance and obtain a sufficiently large connection strength.

Description

technical field [0001] The present invention relates to joints for resin pipes that are clamped in pipelines such as indoor hot water supply pipes, and in particular to the anti-slip effect, watertight sealing performance and connection workability of resin pipes that are prone to diameter expansion deformation or bending deformation. The above-mentioned resin pipe joint for improvement measures. Background technique [0002] Conventionally, for the plug-in type fittings connected to hot water supply and water supply pipes formed by resin pipes, a function has been proposed that can exert the anti-breakage function and water-tight sealing function of the resin pipes, and can confirm that the resin pipes are properly connected (connection) Confirmation function) and other pipe joints (for example, refer to Patent Document 1). [0003] In the plug-in type pipe joint proposed by Patent Document 1, the snap-off ring fitted on the outside of the resin tube is bitten into the out...

AI Technical Summary

Problems solved by technology

In addition, when the resin tube is bent and deformed at the front end of the guide cylinder, the influence of the bending deformation affects the fitting part of the retaining ring with the resin tube and the fitting part of the resin tube with the guide cylinder, etc., thereby damaging the Initial anti-off performance, may not be able to exert sufficient anti-off effect

[0007] Thus, as the conventional example of the plug-in type pipe joint proposed in Patent Document 1, there are problems of difficulty in downsizing the size and an increase in cost.

In addition, since the detachment prevention ring for the resin tube is mainly used to prevent detachment, especially, there is a problem that the connection strength may decrease when the connected resin tube is bent and deformed at the front end of the guide cylinder.

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