| 摘要 |
PROBLEM TO BE SOLVED: To provide a fusion type resin pipe coupling structure capable of sufficiently exhibiting the slipping-out preventive function of a tube member, capable of securing safety, and capable of simplifying fusion work of the tube member, even when abnormal fluid pressure and mechanical abnormal extraction force except for internal pressure are applied, by removing an obstacle to realizing high purity of fluid by solving the problem of gathering the fluid. SOLUTION: An annular seal part 30 having a swelling part 31 abutting in a close contact shape on an inlet side seal part 25 by receiving the fastening action to a male screw 26 of a socket part 24 of a union nut 22 and a fitting projection part 32 abutting in a close contact shape on the innermost side seal part 27, is integrally molded by resin on the outer periphery of one end part 21a of the resin tube member 21 inserted into a through-passage 23 of a coupling body 20. The other end part 21b of the tube member 21 is formed into a fusion part butted against and fused on an end part of the other resin tube member 38. COPYRIGHT: (C)2006,JPO&NCIPI
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