Title:
OIL LEAK DETECTION DEVICE FOR HYDRAULIC ELEVATOR
Document Type and Number:
WIPO Patent Application WO/2018/025320
Kind Code:
A1
Abstract:
This oil leak detection device for a hydraulic elevator is connected to a relay system control panel so as to enable communication therebetween, the relay system control panel controlling the operation of the hydraulic elevator, transmitting a travel signal if a car is traveling, transmitting a door zone signal if the car is located in a door zone, and transmitting an upward operation signal if the car is traveling in the upward direction. The oil leak detection device is configured by comprising an oil leak determination unit which counts the number of times a re-leveling operation is carried out on the basis of whether the travel signal, door zone signal, and upward operation signal have been received from the relay system control panel and detects oil leaks in the hydraulic elevator if the number of times the re-leveling operation is carried out becomes a preset number or more within a preset time.
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Inventors:
KAMAI HIROAKI (JP)
Application Number:
PCT/JP2016/072594
Publication Date:
February 08, 2018
Filing Date:
August 02, 2016
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
B66B5/02; B66B1/40; B66B9/04
Foreign References:
| JPS5364470U | 1978-05-31 | |||
| JP2010018389A | 2010-01-28 | |||
| JPH0797154A | 1995-04-11 | |||
| US20130333982A1 | 2013-12-19 |
Attorney, Agent or Firm:
SOGA, Michiharu et al. (JP)
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