| 摘要 |
The invention relates to a cable lifting apparatus for lifting people or loads, including a driving pulley provided with a peripheral groove housing a suspension cable against which rollers apply a pressure in order for the driving pulley to perform the pulling function thereof. The apparatus is designed such that the radial load on the cable is a function of the load to be lifted and of the torque applied by a pinion mounted at the output of the reduction power unit and meshed with a gear wheel solidly connected to, and rotatably concentric with, the driving pulley. Said apparatus enables the use of a variable number of cables, either through the use of a modified pulley provided peripherally with as many grooves as there are cables and having an independent group of pressure rollers for each cable or through the formation of grooves between portions separated by notches made in radial planes between successive portions and having a single group of pressure rollers for all of the cables.
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