| 摘要 |
The present invention comprises outward-path extensions and inward-path extensions that protrude from individual panels, wherein the outward-path extensions and inward-path extensions provided on the same side of the axis of rotation are connected together. Specifically, a link is provided between the outward-side extensions and the return-side extensions, which are drawn out through the intermediary of a draw-out cylinder for which the distance remains constant before and after the fluctuating movement of the panels. |
