| 摘要 |
PROBLEM TO BE SOLVED: To provide an assembling configuration of a screen unit including first and second screens and slats between those screens to a simple and rational screen frame, the screen unit being configured such that the slats can easily perform an opening/closing operation in accordance with the rotation of a winding shaft, and that the sagging of the screens is minimized.SOLUTION: A screen unit 10 including first and second screens 11 and 12 to be superimposed and wound up by a winding shaft 8 and a plurality of slats connected between those screens is configured such that the slats take a closed posture until the stretch of the first screen is completed in accordance with its rewinding, and that the angle of inclination of the slats is made adjustable in accordance with the further rewind rotation of the winding shaft after the stretch of the first screen is completed. An attachment end 11a of the first screen to the winding shaft is attached to the winding shaft by giving a level difference d between the attachment end 11a and an attachment end 12a of the second screen such that the attachment end 11a protrudes so as to be longer than the attachment end 12a. The level difference retains the first screen from being wound in a reverse direction due to the continuation of the rewind rotation of the winding shaft.SELECTED DRAWING: Figure 2 |
