| 摘要 |
PURPOSE:To improve the performance of a hydraulic elevator where the landing level is corrected because a disorder is generated in the landing level and a hazard arises for a passenger to get on and off from the elevator car owing to oil leak of a hydraulic pump at a standstill at the landing level. CONSTITUTION:A mechanism to stop an elevator cage 4 is composed of a brake device 14 to work on a hydraulic pump 5 and a current control device 13 for controlling the brake device 14. A position sensing device 9 is installed on the car 4 in order to correct leak from the pump 5 when the elevator is at a standstill at a certain specific floor, and the output signal sensed is taken in to a position correcting device 10, and a position signal in accordance with the car position is fed to a speed control circuit 11. Then an elevator control circuit is started, and the car 4 undergoes position correcting control automatically. Besides the specified floor, the brake device 14 is left out of operation, and position correction is made with a position command device. |
