| 摘要 |
An elevator installed in an elevator shaft has a cage, a counterweight, hoist cables suspending the cage and the counterweight, and a driving unit disposed outside a space in which the cage moves vertically in the elevator shaft, and provided with drive sheaves around which the hoist cables are wound to move the cage and the counterweight in the elevator shaft by the driving unit. The hoist cables are wound around the drive sheaves and sheaves supported on the cage and the counterweight in two-to-one roping arrangement such that the driving unit is at a level below the ceiling of the cage as located at its uppermost position. The cage-side sheaves are disposed at four positions on the lower portion of the cage respectively and symmetrically with respect to a center of gravity of the cage in a top plan view.
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