| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic elevator device structured to be capable of arresting a foreign material contained in pressure oil flowing into a pilot circuit, and preventing the occurrence of trouble due to the clogging of a throttle valve with a foreign material. SOLUTION: An open/close valve 5 is provided, so as open when a car travels, and close when the car 2 is at rest. Furthermore, a control device 13 controls the rotation of the electric motor 4 of a hydraulic pump 3 for the change of a delivery flowrate from the hydraulic pump 3, thereby controlling the ascending motion of the car 2 engaged with a hydraulic jack 1, Also, the rotating speed of the electric motor 4 is changed for controlling the flowrate of a pressure oil to the hydraulic jack 1, thereby controlling the descending motion of the car 2. In addition, a throttle valve 11 is installed on a pressure oil flow pilot circuit 9a communicated to the open/close valve 5, and a pilot filter 30 is laid between the pressure oil flow passage 6b of the pressure oil flow pilot circuit 9a and the throttle valve 11, thereby arresting a foreign material contained in the pressure oil. |
