| 摘要 |
<p>PURPOSE: To prevent a synthetic resin pipe from coming off from a reception port of a pipe joint at the time of welding by embedding heating wire in an inner peripheral surface of the reception port. CONSTITUTION: A reception port 3 of a pipe joint 1 has a stepped portion of a large diameter size, while a heating wire 4 is embedded in a small diameter portion having an inner diameter substantially the same size as the outer diameter of a synthetic resin pipe 2. A cylindrical clearance 8 is formed between the synthetic resin pipe 2 inserted in the reception port 3 and the large diameter portion of the reception port 3. It has inner and outer surfaces formed with sawteeth portions. A coming-off preventive means 7 axially formed with a split is formed on a circumference. When the pipe 2 is going to come off, sawteeth portions on the inner and outer peripheral surfaces bite into the inner peripheral surface of the reception port and the synthetic resin pipe, for preventing the coming-off.</p> |
