| 摘要 |
PURPOSE:To enable work, ventilation, cleaning, and getting rid of rats or the like in the ceiling to be easily carried out by making it possible to open or close ceiling boards. CONSTITUTION:The ceiling board of a room 1 is divided into two parts, and the divided two ceiling boards 2, 3 are supported on supporting rails 4, 5 (not shown) positioned above and below. The supporting rails 4, 5 are placed parallel, and endless turning wires 10, 11 are connected to the divided ceiling boards 2, 3 respectively. By normally or reversely turning motors 14, 15, the divided ceiling boards 2, 3 are laterally moved, so that the ceiling surface is opened or closed. |
