| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an energy saving type hydraulic elevator, which is small- sized and has simple structure, whose maintenance is easy, in which shocks are small, lifting a cage for carrying people and/or load by using pressure oil stored in an accumulating cylinder to reduce used electric energy, and utilizing speed control cylinder disposed to a balance weight to control a lifting speed of the cage. <P>SOLUTION: The hydraulic elevator device is for elevating the cage 15 by a hydraulic actuator 16. The hydraulic elevator device lifts the cage 15 by supplying the pressure oil, which is generated by the balance weight 8 and is stored in the accumulating cylinder 9 whose capacity is larger than that of the hydraulic actuator 16, to the hydraulic actuator 16. Further, the hydraulic elevator device makes a lowering-control pressure compensated flow control valve 29 control flow rate of the pressure oil returned from the hydraulic actuator 16 to a tank 5 to lower the cage 15 while the cage is accelerated, is in full-speed, and is decelerated. <P>COPYRIGHT: (C)2003,JPO |
