| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To simplify a lift driving mechanism of a movable fence and its controlling mechanism, to completely eliminate danger of free fall or the like, and to design the lift driving mechanism and the controlling mechanism, when the movable fence disposed in an opening (entrance to a train) between fixed fences disposed at side edges of a platform in a railroad station is used as a lifting door. <P>SOLUTION: The movable fence of an opening between the fixed fences in the platform is used as a lifting door. Struts are disposed at both ends of the opening between the fixed fences, and hoisting devices are disposed at the upper ends of the struts and hoist the lifting door. The hoisting device comprises a hoisting drum, a gear transmission by worm gear, and an electric motor. The lifting door has sliders at its both right and left ends, the sliders are guided by the struts, one end of a wire rope wound about the hoisting drum is connected with the slider, the other end is connected with a balance weight, and the weight of the balance weight is balanced with the weight of the lifting door. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
