| 摘要 |
A preloader apparatus which retracts a buckle upon quick deceleration of a vehicle to tighten a webbing, and then restores the buckle to a position of ordinary vehicle running, to contemplate the improvement in operability of an operation button. The buckle (18) is retracted upon quick deceleration of a vehicle from an ordinary protracted position to a retracted position through wires (40, 42) wound around a drum (32). After that, when a buckle-retracting force decreases and becomes smaller than a buckle-protracting force, a force F corresponding to a difference between the both acts on a projection (50), and the projection (50) is broken. Although a meshing portion (64) of a pawl (58) meshes with an external tooth (62) of an external gear (56) to prevent the external gear (56) from rotation in a direction of buckle protraction, the breakage allows the drum (32) to rotate in the direction of buckle protraction, and the buckle (18) can be restored to the protracted position. Projections (68) abut against a stopper (66) at the protracted position, and the buckle (18) is prevented from further protraction. <IMAGE> |
