| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin pipe joint which is improved to be superior in assembling workability and handling property by ensuring the check of the fastening of a union nut to be finished or almost finished at a working site under noisy conditions. SOLUTION: In the resin pipe joint, as the threading of the union nut 2 is progressed with a female screw 8 and a male screw 5 threaded to each other in the state that a tube 3 is externally fitted to an inner cylinder 4 to produce an enlarged-diameter part 3A, an enlarged-diameter change region 9 is thrust with a sealing thrust part 10. The male screw 5 and/or the female screw 8 has a defective part K where no thread exists in a predetermined screw pitch. A fastening finish recognizing means C is provided which is set to produce screw skip on a threaded portion (r) between the male screw 5 and the female screw 8 in the state of finishing the threading of the union nut 2 such that the sealing thrust part 10 thrusts the enlarged-diameter change region 9 to form a seal part S. COPYRIGHT: (C)2011,JPO&INPIT
|
