| 摘要 |
PROBLEM TO BE SOLVED: To provide a sash sheave capable of decreasing rattling noises caused by bringing creep deformed parts of wheels into contact with a rail. SOLUTION: First and second wheels 11 and 12 are mounted to the sash sheave body 10, and in the sash sheave making an outside diameter d1 of the first wheel 11 small and making an outside diameter d2 of the second wheel 12 large, the creep deformed part 17 of the first wheel 11 and creep deformed part 18 of the second wheel 12 are not simultaneously brought into contact with each other, so that the rattling noises can be decreased.
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