Pit mounted retractable vehicle restraint

摘要

Apparatus used in a loading dock comprising a dock leveler mounted at the loading dock with a pit positioned below said dock leveler. A frame is mounted in the pit to support a vehicle restraint. The restraint has an arm assembly mounted to said frame for pivoting motion and a hook assembly having multiple hook elements mounted on the arm assembly and outward from the frame. A first actuator is mounted to the frame and engaging the arm assembly to drive both the arm assembly and the hook assembly to a lower inoperative position. A second actuator is mounted to the first actuator and the arm assembly to provide a constant upward bias tending to pivot the arm assembly and the hook assembly upward to an operative position.