To execute automatic winding in/out performance, using a biasing material consisting of a heat sensing type shape memory alloy and a biasing material consisting of a regular steel, based on the difference in biasing forces of the biasing materials according to a temperature.
An automatic reed screen includes: a first biasing material 91 consisting of the heat sensing type shape memory alloy; a second biasing material 92 consisting of the regular steel; and a rotation body 95 having a biasing material locking part 95A for locking one ends of both biasing materials 91, 92, and a rotation shaft fixing part 95B. One ends of both biasing materials 91, 92 are locked in the biasing material locking part 95A, respectively. The rotation shaft fixing part 95B and a casing body 93 are rotatably connected at a position in a predetermined distance from a straight line for connecting the locking parts at one ends of both biasing materials 91, 92 in the biasing material locking part 95A. The other ends of both biasing materials 91, 92 are locked in the casing body 93 at a remote position further than the distance to the connection position of the rotation shaft fixing part 95B and the casing body 93 from the locking part at one ends of both biasing materials 91, 92.
Takashi Okamura
Horimai Kazuharu
Yoshihiro Hirai
Masahiko Denda
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