Cable suspended hoisting carriage - is held in equilibrium by auxiliary rope drum and lifting rope gripping roller connected by reversing gearbox

摘要

Conventional hoisting carriages can only be held stationary at a desired position by clamping on the suspension cable. This is avoided and the carriage held in equilibrium by the use of a storage drum (4) and lifting rope gripping roller (7) which are connected by a reversing gearbox (6). Thus the gripping roller can be driven in the same or opposite sense as the storage drum (4). Wound round the storage drum is an auxiliary rope (5) connected at the other end to a fixed winching drum. The lifting rope (8) passes between the gripping roller (7) and pressure roller (9) to a second winching drum. ADVANTAGE - By approp. switching of the reversing gearbox drive and actuation of the two winching drums, light and heavy loads can be raised and lowered at any desired postiion of the carriage, which remains at rest under equilibrium of the forces acting on the two ropes. Loads can also be traversed at a constant height from varying terrain. The gearbox has a locked position.