PURPOSE: To automatically close a shutter, by separating frame bodies by temperature in case of fires by unifying a pair of the frame bodies to the way of a rod for opening and closing the shutter by means of a low-temperature molten alloy.
CONSTITUTION: When pulling a cord 14, a switch 12 is broken, a fan 4 turns, an interlocking plate 7 is downward drawn through a rod 15 and a condition that a shutter 5 is opened is kept. Meanwhile, a separating device 16 is installed on the way of the rod 15. When a fire starts at that time and temperature in a frame body 2 excedds the melting point of a low-temperature molten alloy 24, the inside of the device 16 melts, the combination of frame bodies 17, 18 is unbound, a bending portion 30 of a rod 29 at the upper side is pushed by the elastic force of a coil spring 25 and the frame bodies 17, 18 are rotated centering aroud a bending portion 21 and open. Thus, the rod 29 at the upper side slips off from a notch portion 23 by the tension of a spring 10 and becomes free, the interlocking plate 7 is upward pulled by means of the spring 10, the shutter 5 closes and the extension of the fire is prevented.
| JPS5442832 | WINDOW |
| JP4585244 | Louver blades and louvers |
INOUE MASAKI
SHIMOJIMA FUKUMI
