| 摘要 |
<p>Stopper pins (78) are arranged on a path of movement of respective reaction-force receiving cam plates (76) and are urged by urging forces of compression coil springs in a direction in which the stopper pins (78) project from circular holes. As a solenoid is energized, the stopper pins are accommodated into the circular holes. The solenoid is operated by means of a stopper switch, and the solenoid in an energized state allows each combination socket (50) to be fitted over a corresponding wheel-mounting nut. With the combination sockets (50) fitted over all of the wheel-mounting nuts, the operation of the stopper switch causes the stopper pins (78) to move to a projected position to prevent rotation of the reaction-force receiving cam plates (76), so that high torque is imparted to transmission shafts, allowing four wheel-mounting nuts to be simultaneously tightened or loosened. <IMAGE></p> |
