| 摘要 |
PROBLEM TO BE SOLVED: To dispose a notch capable of expanding ring-shaped spring means for biasing a movable tooth engaged with a chain, radially outward, such that no movable tooth is unable to be biased.SOLUTION: A ring-shaped spring means 19 for biasing a movable tooth 17 engaged with an inner periphery of a chain link, outward in a radial direction of a pulley, has a C-shape formed by cutting out one of connection elements 22 between U-shaped elements 21 for performing the biasing at a place 23, to be fitted to a pulley central boss portion 16. At the time of mounting, the spring means 19 is expanded in a circumferential direction at the notch place 23, and a connection element 22 of the spring means 19 is fitted to a corresponding circumferential groove 18b on a movable tooth guide 18 in this state. Here, the spring means 19 is circumferentially positioned such that the U-shaped element 21 is aligned with a movable tooth housing groove 18a. As a result, the notch place 23 of the spring means 19 is positioned at the place shifted from the movable tooth housing groove 18a in the circumferential direction. |
