| 摘要 |
PURPOSE: A movable chorus stage is provided to move regardless of places and to form straight and curve stages freely. CONSTITUTION: In the movable chorus stage, multistage stairs(7) are connected to a stair support(8), a stair backing shaft(6) is connected to a movable shaft(5). When an intermediate bending bar(1) connected with the movable shaft(5) pulls a binding control bar(11), the movable shaft(5) goes up and a stair backing shaft(6) connected with the movable shaft(5) is bent and stairs(7) are folded. When a lower bending bar(2) is bent, the movable bar(3) goes on a fixed bar(9) and a stair support(8) is folded to make the stage at the folded stage completely.
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