| 摘要 |
<p>PURPOSE:To prevent the increase of damage caused by a fire by providing a communication means for informing a fact that an object is left behind in an operating area of a fireproof door, when an object detector detects the object, and a man detector does not detect a man. CONSTITUTION:In the case an approaching person brings an object 11, and leaves after placing it in an operating area 2a of a fireproof door 2, even if the person cannot be detected, an object detector 6 detects continuously the object 11 which is left behind. Accordingly, when the person goes away from the fireproof door 2 in a state that the object 11 is left behind, a man detector 5 cannot detect the person, and when a relay is reset and an actuating circuit of a communication device 7 is closed, the communication device 7 is actuated, and the person who goes away is called in a voice, for instance, such as 'do not place a thing in front of the fireproof door'. When the object 11 is removed from the inside of the operating area 2a of the fireproof door 2 by becoming aware of the communication in a voice, the communication from the communication device 7 stops. When a fire is generated, a smoke sensor 4 senses smoke and an opening/closing device 3 closes the fireproof door 2.</p> |
