| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of parts and solve the problem of requiring much time for adjusting a conventional shading screen device in which a slider is moved by an endless rope, when the driving load of the slider is light. SOLUTION: Driving gears 5a, 5b connected with a pipe are provided at both ends of one side of a rectangular frame body 2 and driven gears 6a, 6b are provided at both ends of the opposite side. Flexible ropes 7a, 7b with gears are hooked on one side of driving and driven gears 5a, 6a and the other side of driving and driven gears 5b, 6b. Respective ends of the ropes 7a, 7b with gears are fixed to sliders 3 through compression springs 10 and respective other ends of the ropes are connected to each other through a tension spring 11. In this way, problems such as a large number of parts or a long adjusting time are eliminated and a stable opening/closing motion can be retained for a long period. |
