Elevator rope slip detector and elevator system
US7578373B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2004 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Nov 11, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In an elevator apparatus, a pulley is provided in a hoistway. A rope that moves together with the movement of a car is wound around the pulley. Further, the pulley is provided with a pulley sensor for generating a signal according to the rotation of the pulley. A rope sensor for measuring the movement speed of the rope is provided in the hoistway. A control panel is provided with: a first speed detecting portion for obtaining the speed of the car based on information from the pulley sensor; a second speed detecting portion for obtaining the speed of the car based on information from the rope sensor; and a determination portion for determining the presence/absence of slippage between the rope and the pulley by comparing the speeds of the car as respectively obtained by the first and second speed detecting portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.