| 摘要 |
PURPOSE:To secure the safety of an elevator system by providing an abnormal running detecting circuit to detect the abnormal signal of a cage depending on the running detecting signal of a running detecting circuit and the closing instruction signal to a control valve, and a control device to stop the rotation of a motor to drive a pump depending on the abnormality detecting signal. CONSTITUTION:When a cage gets a specific speed V0, a running detecting circuit 22 detects it and outputs the resultant output 22a to an abnormal running detecting circuit 23. Then, the abnormal running detecting circuit 23 receives the output 22a and the closing control instruction of a control valve 5, that is, the opening signal of an operation signal 19b and the closing signal of an operation signal 19c, and generates and abnormal running signal 23a. And after that, a control device 19 receives the abnormal running signal 23a, and operates to stop a motor 2 urgently through a control signal 19a and a motor driving device 20. Consequently, the running of a cage 10 is stopped. |
