TWO DOOR TYPE MOVABLE FENCE FOR PLATFORM

PROBLEM TO BE SOLVED: To construct a highly reliable door driving mechanism in a driving system being the same as in the case of a one-door movable fence, simple in structure and good in maintenance. SOLUTION: When driving parts (a motor 9 and a pulley 10) are turned to the left in the closed condition of a door, a belt 11 is turned to the left with its lower part gripped and fixed by a bracket 13 of a door case 1, as a starting point. Actually, the belt fixed and supported thereto is moved to the left. The driving parts are integrated with a rear door 2 and so the rear door supported by a bearing 6 is moved on a sliding rail 5 of the door case in the opening direction. On the other hand, with the upper part of the belt gripped and fixed by a bracket 14 of a front door 3, the belt and the driving parts are moved in the amount of movement and in the double amount of movement, respectively, on the sliding rail 7 fixed to the rear door by a bearing 8 supporting the front door. The L-movement of the rear door causes the 2L-movement of the front door at a speed twice faster than that of the rear door, and the movement of the rear door and the movement of the front door are completed at the same time and stopped at the same position. COPYRIGHT: (C)2004,JPO