| 摘要 |
PURPOSE:To provide a control device for an oil pressure elevator that is quick and comfortable by providing a valve control device which performs current control of an electromagnetic proportional flow rate valve based on a valve current reference from a pattern change-over device. CONSTITUTION:When a starting valve current pattern 11a is outputted from a starting current pattern generating device 11 to lift an elevator, a lifting valve current 5a which is proportional to a valve current reference (Iref) is supplied to an electromagnetic proportional flow rate control valve 2A for lifting, which is closed by a degree proportional to this current 5a. When the oil pressure pump 7 side pressure of a check valve 9 exceeds the oil pressure jack 1 side pressure, oil begins to flow to the oil pressure jack 1 side through the check valve 9. When a flow rate detecting device 14 detects this moment, the valve current reference (Iref) is changed over to a running valve current pattern 15a, which is supplied to the electromagnetic proportional flow rate control valve 2A so as to ensure speed feedback control that is little affected by disturbance. |
