| 摘要 |
PROBLEM TO BE SOLVED: To provide a pulley capable of enhancing strength substantially without thickening a sheet thickness, by dispersing portions of generating stresses. SOLUTION: In this pulley 7 provided with a bearing holding part 9, a belt winding part 11 and a connection side wall part 13, the connection side wall part 13 is constituted of the first stepped part 13a projected toward an outer circumferential direction ranging over from an outer circumferential side to a rotation center side, the second stepped part 13b projected frontwards, the third stepped part 13c recessed rearwards and the fourth stepped part 13d projected frontwards, the first curvature radius a is larger than the fourth curvature radius d, the second curvature radius b is smaller than the third curvature radius c, and the third curvature radius c is smaller than the fourth curvature radius d. COPYRIGHT: (C)2007,JPO&INPIT
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