| 摘要 |
PROBLEM TO BE SOLVED: To improve operability and to make a device inexpensive by reducing the number of parts by enabling selective opening/closing such as the both-side opening/closing or one-side opening/closing of valley part with one input source concerning a vinyl sheet opening/closing device for a vinyl house valley part. SOLUTION: Inside the valley opening/closing device, a worm wheel attaching/detaching instrument 7 is arranged on a worm wheel attaching/detaching shaft 11 and by operating a handle 4, the worm wheel attaching/detaching instrument 7 moves a worm wheel and is attached to/detached from a worm. The vinyl sheet is opened/closed only on the side of driving force transmission engaging the worm and the worm wheel and both-side opening/closing or one-side opening/closing is enabled. |
