Elevator safety device with foreign matter detection using a light beam
US8672098B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2009 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | Oct 6, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B13/26
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
There is provided an elevator safety device that can prevent a light beam from being looked into. The elevator safety device according to the present invention includes light emitting means for emitting a light beam crossing an entrance; light receiving means for detecting the light beam emitted from the light emitting means; foreign matter detection means for generating a foreign matter detection signal when detection of the light beam by the light receiving means is interrupted; and control means. The control means causes the light emitting means to stop an emission in a fully opened state of car doors, and causes the light emitting means to start the emission at a start of or during a closing operation of the car doors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.