| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a self-weight lowering control system for fireproof and smokeproof shutter without using an interlocking relay for harm prevention. <P>SOLUTION: The gravitational lowering control system for fireproof and smokeproof shutter includes an automatic closing device 8 which operates to release a brake of an opening/closing machine by the input of a start signal outputting from a disaster prevention board 6, and lowers a shutter curtain 1 with its own weight, a manual closing device 9 including an emergency operation switch 90, and obstacle detection means 1b, 1c, and 10 of outputting an obstacle detection signal when detecting an obstacle at the time of lowering the shutter curtain 1 with its own weight. The manual closing device 9 includes a battery, and can transmit an operation signal to the automatic closing device 8 using the battery as a power source, and the shutter curtain 1 which is lowered with its own weight after the output of the start signal from the disaster prevention board 6 is stopped and re-lowered with the operation signal that is transmitted to the automatic closing device 8 from the manual closing device 9. <P>COPYRIGHT: (C)2013,JPO&INPIT |
