| 摘要 |
PROBLEM TO BE SOLVED: To prevent loosening of screw connecting portion by thermally caulking flange portions of first and second resin moldings connected by screwing. SOLUTION: The first resin molding 21 with an input port 24 and a second resin molding 22 with a drain port 28, respectively composed of resin bodies are screwed and connected to a female screw portion 24 and a male screw portion 25 to fit the flange portion 21a of the first resin molding 21 to an inside low portion 29a of the flange portion 36 of the second resin molding 22. A side face of the flange portion 21a have a plurality of continuous approximately V-shaped grooves 37 symmetrically to each other in the circumferential direction. A tool 35 of a thermal caulking device is fitted and inserted to the first resin molding 21, its tip end face is brought into contact with top faces of the flange portions 21a, 36, and the resin parts of the flange portions 21a, 36 are softened and deformed by the heated tool 35 to allow the resin part of the flange portion 36 to bite into the groove 37 of the flange portion 21a. COPYRIGHT: (C)2008,JPO&INPIT
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