B - Operations – Transporting – 66 – B
Patent
B - Operations, Transporting
66
B
187/12
B66B 17/00 (2006.01) B66B 11/08 (2006.01) B66D 5/16 (2006.01)
Patent
CA 1207676
ABSTRACT OF THE DISCLOSURE A hoisting machine for elevators is provided in which a main rope for suspending a cage is wound round a sheave, the cage is caused to ascend and descend by driving the sheave with an electric motor, a braking force is generated by frictionally applying brake shoes to the main rope, and the cage is restrained by the braking force, whereby even when the sheave has a small diameter, a required braking force is generated, and the ro- tational frequency of the sheave is raised, to render the size of the electric motor smaller. A hoisting machine for elevators is also provided in which a rotor core is held in magnetic en- gagement with a stator core outside the stator core, the resulting structure is supported by a frame, this frame is formed with grooves so as to construct a sheave, and a main rope is wound round the sheave by three or more turns, whereby a frictional force is increased without enlarging the external shape of the hoisting machine, to generate a required braking force.
442523
Marks & Clerk
Mitsubishi Denki Kabushiki Kaisha
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