Elevator rail joint detector and elevator system
US7588127B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2004 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Nov 4, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B1/3492
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In an elevator apparatus, a guide rail has a plurality of unit rails that are vertically connected to each other. A car is provided with a rail joint detecting device mounted on the car, for detecting the presence/absence of a joint between each of the unit rails. The rail joint detecting device has a joint detecting portion for optically detecting the presence of the joint; and a joint determining portion for determining the presence/absence of the joint based on information from the joint detecting portion. Information on the presence/absence of the joint is outputted from the joint determining portion to a car position correcting circuit. In the car position correcting circuit, information on the position of the car is corrected based on the information on the presence/absence of the joint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.