| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a resin pipe joint improved to be excellent in assembly workability and handling properties by making it possible to confirm that tightening a union nut is ended or is almost ended even when a pipe joint is placed in invisible or less visible place or even in a noisy site. <P>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 fitted to an inner cylinder 4 to form a diameter-enlarged part 3A, and a diameter-enlarged change region 9 is thrust by a seal thrusting part 10. By tightening the union nut 2 just before the end of advancing by pressing a diameter-enlarged change region 9 via a sealing thrusting part 10, the projection 20 of a flange 1A of a joint body 1 and the recess 19 of an arm section 24 projected at an end of the union nut 2 are engaged or separated by the arm section 24 radially bent outward to generate a sharp torque change. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
