| 摘要 |
PURPOSE:To regulate the starting edge and terminating edge positions in the advance or retreat direction of the shading sheet without fail by regulating the position in the normal and reverse directions of the mechanical control means. CONSTITUTION:In accordance with the span of the starting edge and terminating edge positions of respective shading sheets 12, the number of the movable stopper body 38 or the size of an engaging claw 40 are set. For example, in case of the regulation of the terminating position, when a driving shaft 18 is rotated in the normal rotating direction, a fixed stopper body 34 is first rotated accompanying the rotation of the driving shaft 18, when the fixed stopper 32 is rotated about one time, the engaging claw 40 of the fixed stopper body 34 is engaged to one side of the engaging claw 40 of the adjoining first movable stopper body 38 and the first movable stopper body 38 is rotated together. Hereinafter, successively, the adjoining movable stopper body 38 is rotated. The engaging claw 40 of final movable stopper body 38 is engaged to the fixed stopper 32 protruded at a flange 17 fixed at a driving motor 16, and therefore, the rotation of the driving shaft 18 is stopped, and respective shading sheets 12 are regulated to the terminating edge position without fail.
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