| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus capable of detecting the overloading of a fixed quantity, irrespective of the center of gravity of the load on a floor board of an elevator vertically movable along a pole. SOLUTION: On a floor board C four spring devices S are disposed in square, a floating board F is laid thereon and a limit switch L is attached so as to detect the vertical motion at the center point of the four points in square. When the load deviates from its gravity center, the floating board tilts in the deviating direction to cause a parallel up-down motion and hence the limit switch L can be set so as to detect the drop quantity at the center point. |
