| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for installing a control valve for a hydraulic elevator to which additional functions can be easily added.SOLUTION: An arbitrary part of a fluid feed pipe 4 provided between a power unit 3 and a hydraulic jack 2 is removed and then an additional control valve with pipes 10 that have the pipes on both ends is installed. The length (distance between the end of one pipe and the end of the other pipe) of the control valve with pipes 10 is same as the length of the removed part of the fluid feed pipe 4. An additional control unit 11 for controlling the control valve with pipes 10 is provided independently from the existing control unit 9. Only a cable required to control the control valve with pipes 10 and a cable, which is required for the purpose of control, between the additional control unit and the control unit 9 are connected to the additional control unit 11. |
