| 摘要 |
PROBLEM TO BE SOLVED: To suppress a power transmission chain having been broken from powerfully contacting a housing to break through the housing, or to suppressing rotation of a pulley from being locked.SOLUTION: Outer diameter-side ends of a pair of sheave surfaces 2c, 2d that each pulley 2 has are provided with restriction members 21, 22 which restrict movement of a power transmission chain 3 to the outer diameter-side ends of the pulley 2. |
