| 摘要 |
PROBLEM TO BE SOLVED: To provide a connecting structure free from the dispersion of connecting strength between a joint and a tube, seen in a conventional welding connection, and allowing the separation of the tube from the joint part in case of a pipe brakeage to perform the repair with a small number of piping members. SOLUTION: This union type connecting structure for a thermoplastic synthetic resin tube comprises a sleeve, a cap nut, and a tube socket. The sleeve is made of a thermoplastic synthetic resin and has an O-ring fitted to one end circumferential part of a short cylindrical body. The inner surface of the sleeve is welded to the end outer surface of a thermoplastic synthetic resin tube by frictional melting connection so that the end part with the O-ring fitted thereto is located on the tube end side. The end part with the O-ring fitted thereto of the sleeve is inserted to the tube socket whose end circumferential surface is protrusively provided from a pipe to be connected, and formed into a male thread, and the cap nut preliminarily installed to the thermoplastic resin tube is screwed to the male thread of the tube socket, whereby the thermoplastic synthetic resin tube is connected to the tube to be connected.
|
