Joint for corrugated tube

Abstract

The invention relates to a joint for a corrugated pipe, which can reliably insert the corrugated pipe into a stated position. The joint (1) for the corrugated pipe comprises: a joint body (10) provided with a through hole (16) for inserting the corrugated pipe (T), a press nut (20) which can slide in the inside direction of the through hole (16) and one end of which is inserted with the through hole (16), an annular stoppage component (50) one end of which forms a plurality of partition parts (53), a restraining component (30) forming a projecting part (31) inserted on the partition parts (53), a sealing component (40) on the outer peripheral face of the sealed corrugated pipe (T), an elastic component (70) kept in a compressed state, and a movable component (80) pressed by the front end of the corrugated pipe (T) and sliding in the inside direction of the through hole (16). When the movable component (80) pressed by the corrugated pipe (T) can slide in the inside direction of the through hole (16), the compressed state of the elastic component (70) is opened, so that the projecting part (31) inserted with the partition parts (53) is released.

Description

technical field [0001] The present invention relates to a bellows joint for connecting bellows used for gas supply piping and the like, and particularly relates to improvement of sealing performance and workability for long-term use. Background technique [0002] In general, in gas supply piping such as city gas, meandering flexible pipes made of metal bellows and joints for bellows connecting them are widely used from the viewpoint of workability and the like. As a joint for bellows, for example, Patent Document 1 describes a joint for bellows, which has: a main body having an inner hole inserted into the end of the bellows and a connecting portion connected to other pipes; The claw in the concave part locks the retainer of the bellows; the sealing mechanism that seals between the bellows and the main body; engages slidably with respect to the main body and locks the bellows on the main body at a specific sliding position The state locks the retainer cylinder of the retain...

AI Technical Summary

Problems solved by technology

Moreover, it is difficult for the operator to distinguish the feel of the bellows passing through the inner circumference of the ring-shaped sealing material and the feel of the stopper.

Therefore, when the corrugated pipe is not actually inserted into the predetermined position of the joint, the construction will be completed and the construction will be terminated, causing problems such as leakage.

[0010] In addition, according to the flexible pipe joint of Patent Document 3, the gasket is compressed in the expanding radial direction by the outer peripheral surface of the flexible pipe before the front end of the flexible pipe abuts against the back end of the gasket, so it may be difficult to make the gasket radially expanded by the operator's pipe insertion force. The gasket moves to the inside of the joint body or the gasket moves before the front end of the flexible pipe reaches the back end of the gasket, thereby damaging the connection reliability of the flexible pipe

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