HYDRAULIC ELEVATOR DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a hydraulic elevator device capable of assuredly stopping a load at a predetermined position by one pilot check valve. SOLUTION: This device connects a bottom side oil sac 2b of a main cylinder 2 lifting/lowering the load 1 with a bottom side oil sac 4b of a balance cylinder 4 lifting/lowering a balance weight 3 by the pilot check valve 15 opened/closed by a valve opening/closing means 18. Since the pilot check valve 16 can be closed by the valve opening/closing means 18, only one pilot check valve 16 assuredly stops the load 1 at the predetermined position and the number of large and expensive pilot check valves 16 can be halved comparing with a conventional hydraulic elevator device. Thereby cost reduction of the hydraulic elevator device can be realized and a space for installing the pilot check valve 16 can be reduced for realizing space saving of the device.