| 摘要 |
A coupling member (18) is of a forked leaf spring which is substantially U-shaped and has a pair of sidepiece portions (18a, 18a), a pair of bent portions (18b, 18b), a pair of joining portions (18d, 18d) and a curved portion (18e). The sidepiece portions (18a, 18a) are disposed parallel to each other. The bent portions (18b, 18b) are configured to extend from the sidepiece portions (18a, 18a) and have sandwich portions (18c, 18c) releasably supporting a first pin (14) mounted on a pulley, respectively. Each sandwich portion (18c) has an inside surface (19a) which is opposed to the outside circumferential surface of the first pin (14) at a regular distance, and a first and second projections (19b, 19c) which are provided at both ends of the inside surface (19a) and contacted with the outside circumferential surface of the first pin (14). |
