| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin pipe joint improved to be excellent in assembly workability and handling properties to confirm that tightening a union nut is ended or almost ended even when a pipe joint is placed in invisible or less visible place or even in a noisy work site. SOLUTION: In the resin pipe joint, the union nut 2 advances by screwing a male screw 5 into a female screw 8 in a state that a tube 3 is externally suitable for an inner cylinder 4 to form a diameter-enlarged part 3A, and a diameter-enlarged change region 9 is thrust by a sealing thrusting part 10. In addition, there is provided a torque varying part 26 where a projection 20 of a joint 1 and a recess 19 of the union nut 2 are engaged or separated by the projection 20 bent and displaced toward an axial center P direction by tightening rotation just before the end of advancing of the union nut 2 by pressing the diameter-enlarged change region 9 via the sealing thrusting part 10. COPYRIGHT: (C)2010,JPO&INPIT |
