| 摘要 |
PROBLEM TO BE SOLVED: To provide a coupling for a resin pipe to facilitate connection to and separation from a resin pipe. SOLUTION: A coupling core 14 is incorporated in a coupling base body 10. An expansion chuck 23 is incorporated in the outer periphery of the coupling core 14 and the coupling base body 10. In the expansion chuck 23, when the chuck is inserted in the whole of a resin pipe, each lock claw part 27 is contracted through press from the inner surface of a hole and in such a state to be inserted in the resin pipe, each lock claw part 27 is expanded. A head 34 is slidably supported at the tip of the coupling core 14. A head 34 has a seal means 40 to seal a part making contact with the inner surface of the resin pipe. When pressure fluid is fed in the resin pipe, the head is moved backward and each lock claw part 27 is contracted. |
