Anti-tilt device for light hoist - has hinge allowing control lever to strike stop button when tilting occurs

摘要

A light hoist, suitable for a building site, has a rear frame (1) in the shape of a long narrow rectangle, with ballast weights (8) mounted at each end, in stacks. Ahead of this frame is a vertical column (2) carrying the jib with a cable pulley at its extensity. Horizontal tie bars (4) connect the bottom of the column with the ends of the frame, and sloping tie bars (3) connect the top of the column. Between the end ballast weights are further ballast weights (42) mounted on a horizontal bar. A plinth (20) carrying the drive motor is connected to this bar, and the plinth is connected by a hinge pin to the frame. If the column tilts, the plint tilts about this hinge, and the operating lever (54) is forced against a button on a vertical post (58), stopping the motor.