| 摘要 |
PURPOSE:To improve riding comfortableness by controlling the opening and closing of the main valve of a control valve by a high pressure fluid to equilibrate the pressures in front and rear of the control valve at the time of start, and then starting a cage. CONSTITUTION:A control valve 2 is disposed between a fluid pressure pump 6 and a fluid pressure cylinder 1, and the control valve 2 is formed of a main valve 20 which is a check valve of pilot operation type, and first, second and third pilot valves 21a, 21b, 21c for controlling the main valve 20. The first pilot valve 21a is regularly closed and supplies a high pressure fluid by excitation to open the main valve 20, the second pilot valve 21b is regularly closed and discharges the high pressure fluid by excitation to close the main valve 20, and the third valve 21c is regularly opened to allow the close of the main valve 20 and interrupts the high pressure fluid by excitation. After the fluid pressures in front and fear of the control valve at the time of start are thus equilibrated, a motor 7, or the pump 6 is driven in the operating direction of a cage. Thus, a smooth operation can be performed, and the riding comfortableness of an elevator can be improved. |
