| 摘要 |
PROBLEM TO BE SOLVED: To improve sealing performance between a pipe body and a joint main body and to securely prevent the pipe body from disconnecting from a pipe joint. SOLUTION: In the cylindrical joint main body 2, a tapered hole 7 of which diameter is reduced toward its back side is provided at a receiving port 6 of the pipe body 1 and an insertion fit hole 8 of the pipe body 1 is provided continuing from the minimum diameter part of the tapered hole 7. In a union nut 3, its end side is screwed and fit to an opening end side of the receiving port 6 of the joint main body 2 from outside and a tapered hole 14 of which diameter becomes larger toward a direction of screwing is provided continuing from an insertion port 13 of the pipe body 1 provided at another end side. A lock ring 4 consists of a cylinder body having a wall peripheral 17 of which vertical section area is an approximate vault shape and fits to the pipe body 1 from outside in a manner that inner peripheral edges 18a of both cylinder tips 18 can contact with an outer peripheral surface of the pipe body 1 and outer peripheral edges 18b of both the cylinder tips 18 can contact with inner surfaces 7a, 14a of the joint main body 2 and the union nut 3 respectively. The pipe joint consists of the joint main body 2, the union nut 3 and the lock ring 4. COPYRIGHT: (C)2007,JPO&INPIT
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