| 摘要 |
<p>A fire detector easily installable, almost not requiring man-hours for installation, and installable at low cost, wherein a pair of electric wires (1) with conductors are wound on a reel (2), and shape memory alloy bodies (8) are installed around the pair of electric wires (1). When the electric wires (1) are extracted from the reel (2), laid down, and fire occurs, the shape memory alloy bodies (8) are recovered to an original shape by the heat of the fire, the electric wires (1) are tightened by the shape memory alloy bodies (8), and the conductors are brought into contact with each other to detect the fire.</p> |
