| 摘要 |
PROBLEM TO BE SOLVED: To reduce or eliminate distortions and a surface waviness generated on a screen.SOLUTION: A pair of suspension brackets are disposed at both ends of a bearing bar 13, and both ends of a roll-up roller are pivotably supported by the pair of suspension brackets. One end of a screen 17 is fixed to the bearing bar through a screen fixing member 20 and the other end is rolled up by the roll-up roller so that the other end can be fed. The screen is doubled by folding back the bottom edge of the screen, and a weight member is attached to the screen 17 so that the weight member is always located at a folded part 17a of the screen. The screen fixing member 20 comprises: a screen fixing body 21, which has a top edge fixed to the bearing bar and a concave groove 21c formed on a lower part; a screen fitting bar 22 on which one end of the screen 17 is fixed, which is loosely inserted into the concave groove 21c; and a bar positioning member 23, which is inserted to an end of the screen fixing body 21 and positions the screen fixing bar 22. The bar positioning member 23 positions the screen fixing bar 22 in the longer direction.SELECTED DRAWING: Figure 1 |
