| 摘要 |
PURPOSE: To save energy and to form into small size by reciprocating oil in an oil pipe connected to each other to lift a car, also decreasing an oil hydraulic pump output by action of a counter weight, so that the car can be driven by the small oil hydraulic pump output. CONSTITUTION: In a control device 7, an electric motor 6 of driving an oil hydraulic pump 5 and a hydraulic valve 4 are controlled, to determine an amount of oil flowing in/out of jacks 3, 13 respectively of a car 2 and a counter weight 12. The car 2 is connected to the counter weight 12 by a rope through a sheave 1 fixed to a ceiling, to relatively run these car and counter weight. At this running time, oil in the two hydraulic jacks 3, 13 flows in/out of the hydraulic jacks 3, 13 connected to each other by an oil pipe 10 through the hydraulic valve 4. Accordingly, in moving oil, by previously having a pressure of weight amount of the counter weight 12, in a pressure rise by the oil hydraulic pump 5, outputting only a shortage amount relating to hydraulic force, required for lift running the car 2, is only required. |
