| 摘要 |
<p>[Means for solving the problems] The stopper 31 having the engaging 31 a engageable with the end 32 behind the rotation direction of the cam plate depressed area is arranged at near the cam plate 12 which is integrally formed with pulley 5 fixed to the engine crank shaft and has the depressed area 30 the disk rim, and the urging means 40 supporting the stopper 31 in a movable manner to the engaging position where the engaging 31a engages with the depressed area and toe the avoidance position for avoiding the rim of cam plate 12, and normally urging to move the stopper to the avoidance position, on the other hand, enabling the stopper to move to the engaging position from the outside, and urging not to move the stopper to the avoidance position until a sufficient rotation load is added to the cam plate 12 at the engaging position is provided.</p> |
