| 摘要 |
<p>PURPOSE:To freely perform ventilation and screening by rotatably mounting a plurality of rectangular blades on a frame, and collectively opening and closing them to an optional angle through a gear and a belt. CONSTITUTION:A blade 4 is directly mounted on a shaft 5 to rotatably mount the blade 4 on a frame 1 through the shaft 5. Otherwise, the blade 4 is mounted on a case 3, and the shaft 5 is mounted on the case 3 to rotatably mount the case 3 on the frame 1. To perform a perfect screening in the closed state, for example, the end part of the blade 4 is formed into a hook so a to be mutually superposed on the adjacent blade 4. A proper belt 7 is laid over gears 6 to interlock a plurality of blades 4, and an electric or manual means is utilized as a driving part for driving the belt 7. Each blade 4 or blade 4 set in the case 3 is collectively interlocked through the gear 6 and the shaft 5, and opened and closed to an optional stage, whereby ventilation and screening can be freely performed.</p> |
