Patent ID: 7137483
Filing Date: 2006-11-21
Classification: B66B,D07B

Abstract:
1. An elevator comprising a cage and a counterweight connected together by a plurality of main ropes, and said plurality of main ropes are wound around a sheave and are driven by the sheave which is driven by a motor, wherein: each of said plurality of main ropes comprises a plurality of strands twisted together and each of said plurality of strands comprises a plurality of wires twisted together, each of said plurality of main ropes is coated with resin material and has a substantially circular cross section, a ratio D/d between a diameter D of said sheave and a diameter d of said plurality of main ropes is 40 or less, and a diameter δ of said wires and the diameter D of said sheave satisfies the following expression where E represents a longitudinal elastic modulus of the wire.