Title:
ELEVATOR SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/170873
Kind Code:
A1
Abstract:
The present invention provides an elevator system that can detect rope slippage without measuring the amount of rotation of a rotary shaft of a hoisting machine. The elevator system comprises a car, a main rope which suspends the car, a sheave around which the main rope is wound, a brake that brakes the sheave, a governor encoder that outputs a movement signal according to the movement amount of the car, and a detection device that detects an occurrence of rope slippage of the main rope slipping on the surface of the sheave, wherein the detection device comprises: a rotation estimation unit that estimates, on the basis of the operating state of the brake, a stop time at which the sheave stops; and a slippage detection unit that detects the occurrence of rope slippage, in which the main rope slips on the surface of the sheave, on the basis of the stop time estimated by the rotation estimation unit and the movement signal outputted from the governor encoder according to the amount of car movement.
Inventors:
SHIBATA ATSUSHI (JP)
Application Number:
PCT/JP2022/010630
Publication Date:
September 14, 2023
Filing Date:
March 10, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
B66B5/02
Domestic Patent References:
| WO2008155853A1 | 2008-12-24 | |||
| WO2009078100A1 | 2009-06-25 | |||
| WO2018016061A1 | 2018-01-25 |
Foreign References:
| JP2011032075A | 2011-02-17 |
Attorney, Agent or Firm:
TAKADA, TAKAHASHI & PARTNERS (JP)
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