| 摘要 |
PROBLEM TO BE SOLVED: To provide a boot for a resin made joint, which is hard to be damaged and excellent in flexibility. SOLUTION: In a bellows 36 of the boot 18 for resin made joint, four ridges of a first ridge 38a to a fourth ridge 38d are formed from a major diameter cylinder 20 side toward a minor diameter cylinder 22 side. A first root 40a to a third root 40c are disposed between the first ridge 38a and the second ridge 38b, between the second ridge 38b and the third ridge 38c, and between the third ridge 38c and the fourth ridge 38d respectively. The wall thickness of the first ridge 38a is the maximum out of the ridges 38a to 38d, the curvature radius of the first root 40a is the maximum out of the roots 40a to 40c. A curvature 48 is formed in a second installing groove 38 of the minor diameter cylinder 22. COPYRIGHT: (C)2007,JPO&INPIT
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