| 摘要 |
PROBLEM TO BE SOLVED: To prevent twisting off and to eliminate galling after tightening by providing one resin part having a male screw and the other resin part having a female screw engaged with this male screw and providing a stopper for a rotating direction in a screw part or in the vicinity of a screw. SOLUTION: At a screw part engagement starting side end part 23 of a male screw, stoppers 14 and 24 struck each other are provided. When one resin part 1 having a male screw 11 and the other resin part 2 having a female screw 21 are screwed and tightened in a resin screw mechanism, the stopper 14 of a screw part engagement termination side end part 13 of the male screw 11 and the stopper 24 of a screw part engagement termination side tip part 23 of the female screw 21 are struck each other and stop, and a first and second annular flange surfaces are matched with each other. Thus, because the stoppers 14 and 24 struck each other are provided, twisting off can be prevented at the time of overload of tightening torque. Also galling of a screw is eliminated.
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