| 摘要 |
PURPOSE:To provide a control device for a hydraulic elevator which is constituted to be manufactured at a low cost and perform excellent compensation for starting. CONSTITUTION:A pressure balance detector 10 displaced owing to a pressure difference between an oil pressure P1 on the hydraulic cylinder 2 side and an oil pressure P2 on the hydraulic pump 5 side is. arranged in parallel to an electromagnetic switching valve 8. It is detected from ON and OFF signals from microswitches SWA and SWB arranged on both sides of a moving piston 11 that displacement of the moving piston 11 of a pressure balance detector 10 is within a given range. When displacement of the moving piston 11 of the pressure balance detector 10 is within a given range, the electromagnetic switching valve 8 is operated to intercommunicate the hydraulic cylinder 2 and the hydraulic pump 5 and a pressure difference between both sides is reduced to perform compensation for starting. |
