WORM GEAR-TYPE DRIVING UNIT, AND ELEVATOR AND ELEVATOR SYSTEM USING WORM GEAR-TYPE DRIVING UNIT

摘要

A lifting device moving along a lifting space within a building comprises: a car unit which moves along a lifting space; a worm driving unit which moves together with the car unit, and in which a rotational shaft is aligned with a moving path of the car unit; and a plurality of worm support units which are provided within the lifting space along the moving path of the car unit on a teeth-interval cycle of the worm driving unit. The lifting device is capable of being lifted by an operation of the worm driving unit relative to the worm support units, and the worm driving unit and the worm support units reduce friction of the lifting device by maintaining low resistance contact, and improve the lifting efficiency.