| 摘要 |
An elevator system has a selector mechanism driven by a cable loop attached to the elevator car. The opposite cable ends are wound on a take-up drum, in opposite rotational directions, in sequential rows across the drum, such that the cable leads travel back and forth across the drum as the drum rotates. A selector cable guide includes a frame pivotable about an axis generally perpendicular to the drum axis. The frame is disposed about the drum, and has a pair of pulleys mounted adjacent to the pivot axis, and a second pair of pulleys mounted to the frame on the opposite side of the drum. Each cable portion is guided about one of the first pulleys, thereafter about one of the second pulleys, and is thereafter wrapped onto the drum. The second pulleys swing laterally to follow the position of the cable leads as they travel across the drum, whereas the first pulleys remain relatively stationary for directing the cable portions up and down the elevator shaft from a relatively constant position.
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