| 摘要 |
PROBLEM TO BE SOLVED: To improve the means within a lift system to reduce the production cost and maintenance cost and detect the load in a lift cage accurately. SOLUTION: A lift cage 3 is placed on a spring element 9 holding a holding frame 7. A belt 12 which is conveyed by a first deflection roller 10 and second deflection roller 11 is mechanically connected with the lift cage 3. The movement of the cage 3 is transmitted to the belt 12 and a pulse generator 13 connecting with the roller 10 is driven thereby. The degree of compression of the element 9 varies according to the change in load. Therefore, the cage 3 generates some movement against the frame 7. This movement is detected by the pulse generator 13 and it is converted into a traveling signal SL. An evaluation unit 18 determined the quantity of load affecting a motor current IW based on the signal. |
