| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint tube and a joining method of a cylindrical member capable of preventing leakage of a pressure medium even if pressure of the pressure medium flowing in the connected cylindrical member becomes high. SOLUTION: The joint tube 1 of a shape-memory alloy for joining end parts of the cylindrical members C which face against each other. The joint tube 1 is provided with cylindrical insertion parts 2 at both end sides having an outer diameter D shorter than an inner diameter D of the cylindrical member C. The cylindrical insertion part 2 recovers its shape by heating it while inserted in a hollow part Ca of the cylindrical member C and then an outer diameter d becomes larger than the inner diameter D of the cylindrical member C. COPYRIGHT: (C)2007,JPO&INPIT
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