JPH0215182Y2 - - Google Patents

Description

[Detailed description of the invention] This invention receives a fire signal from a fire detector or manual fire transmitter connected to the signal line from the receiver and rings the district bell corresponding to the district where the fire occurred. Regarding fire alarm devices.

In conventional automatic fire alarm equipment, when the receiver receives a fire signal from a fire detector or a manual fire transmitter, the receiver's emergency bell sounds to alert watchmen to the occurrence of a fire, and the system is installed in the area where the fire occurred. The local bell is rung.

However, if you immediately ring the district bell at the same time as a fire is received, there is a risk that the district bell will alert you and cause unnecessary confusion. The vehicle will be stopped and staff will rush to the scene of the fire to confirm the fire.

However, when going to a fire scene, priority must naturally be given to firefighting, and for this reason, in order to ring the district bell, it is not possible to return to the receiver and release the district bell stop switch. There was a problem in that it took a long time to ring the district bell.

The present invention was developed in view of these conventional problems, and even if the ringing of the district bell is stopped by operating the district bell stop switch on the receiver, it is possible to immediately stop the district bell from the field side. It is an object of the present invention to provide a fire alarm device which can be released to issue an alarm in a fire outbreak area.

To achieve this purpose, the present invention detects the AND reception of both the fire signal from the fire detector and the fire signal from the manual fire transmitter, and releases the stoppage of the district bell based on this detection output. west,
Even if you stop the district bell and rush to the scene when a fire signal is received from a fire detector, if a fire is confirmed, you can operate the switch on the manual fire transmitter installed near the fire scene. By detecting the logical product of the fire signal from the fire detector and the manual fire transmitter in the receiver, the district bell is automatically deactivated and an alarm is issued.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a circuit block diagram showing an embodiment of the present invention. First, to explain the configuration, 1 is a receiver, and from the receiver 1 are power supply signal lines 2 and 3.
and the common line 4 are drawn out, the power signal line 2 and the common line 4 are drawn out to the terminal via the repeater 5, while the power signal line 3 is directly drawn out to the terminal. A plurality of fire detectors 6 are connected between the power signal line 2 from the repeater 5 and the common line 4.
a, 6b are connected in parallel, each fire detector 6a, 6
Each of b is a unique signal oscillator 7a, 7 that sends a unique signal for identifying the sensor activated at the time of alarm.
It is equipped with b. Further, a terminating resistor 8 is connected to the terminal ends of the power supply/signal line 2 and the common line 4.

On the other hand, a manual fire transmitter 9 is connected between the power supply signal line 3 and the common line 4 from the receiver 1, and the manual fire transmitter 9 has an operation switch 10 having a push button structure and an operation switch 10. Unique signal oscillator 1 that operates and sends a unique signal when turned on
1, and an indicator light 12 that is turned on by a switch operation.

Next, to explain the configuration of the receiver 1, the receiving relay 1 corresponds to the fire detectors 6a and 6b provided in the terminal.
3 is provided, and a receiving relay 14 is provided corresponding to the manual fire transmitter 9, and by the operation of the receiving relays 13 and 14, fire reception, that is, the output of the relay contact is given to the control unit 15. As the control unit 15, a microcomputer is used which performs program control to determine the reception of a fire, ring a bell, etc.

Further, a pair of bell wires 17 and 18 are led out from the receiver 1 to which a district bell 16 of a caution area in which a fire detector and a manual fire transmitter are installed is connected, and the receiver on the side of this bell wire 17 1 is provided with a district bell stop circuit 19 that opens a switch contact based on a district bell stop signal outputted from the control unit 15 when a district bell stop switch (not shown) is operated, and furthermore, a district bell stop circuit 19 that opens a switch contact based on a district bell stop signal output from the control unit 15 when a district bell stop switch (not shown) is operated. A district bell selection circuit 20 is provided on the 18 side, and a receiving relay 1
The switch contact is closed by the selection control signal of the receiver 1 outputted by the operation of 3.

FIG. 2 is a block diagram showing the functions of the receiver realized by the control unit 15 using a microcomputer in the embodiment of FIG. A signal line from a fire transmitter is connected, and when a fire detector or a manual fire transmitter is activated, an alarm current flowing through the signal line is detected and a fire reception signal is input to the control section 15. The control unit 15 includes a fire reception processing unit 22 that receives and processes fire signals from fire detectors and manual fire transmitters, and various operation switches provided in the receiver 1, such as a district bell stop switch for stopping the district bell. A switch input processing unit 23 that processes switch input, and a district bell stop cancellation processing unit 24 that performs processing to release the district bell in a stopped state based on the processing output from the fire reception processing unit 22 and the switch input processing unit 23. The control output from the control section 15 controls on/off of the district bell stop circuit 19 provided in the bell wires 17 and 18 drawn out from the bell power supply 25.

Next, the operation of the embodiment of the present invention shown in FIGS. 1 and 2 will be explained with reference to the program flow of the district bell stop cancellation processing section of FIG. 2 shown in FIG.

First, in the steady monitoring state, in order to avoid unnecessary confusion due to the ringing of the district bell 16 based on fire reception, the district bell stop circuit 19 is operated by operating a district bell stop switch (not shown) provided on the receiver.
A district bell stop signal is outputted from the control unit 15 to open a switch contact of the district bell stop circuit 19 to prevent power supply to the district bell 16. Therefore, even if the fire reception processing section 22 receives the fire signal from the fire detector, the district bell stop circuit 19 provided on the bell wire 17 side
Turn it on so it doesn't work.

In this state, for example, if the fire detector 6a detects a fire and issues an alarm, a line current due to the alarm from the fire detector 6a flows between the power signal line 2 and the common line 4, and is controlled by the operation of the receiving relay 13. A fire signal is input to section 15 by a fire detector. Of course, the unique signal oscillator 7a operates simultaneously with the alarm from the fire detector 6a and outputs an alternating current signal of a pre-assigned frequency to the receiver 1. In the receiver 1, as shown in the embodiment of FIG.
The fire reception processing unit 22 of the control unit 15 determines whether a fire has been received based on the received signal from the fire alarm, the ringing of the fire bell installed in the receiver, the representative fire light, and the area where the fire occurred, which is determined based on the unique signal. It outputs a processing signal to turn on the district lights, and also sends out a selection control signal to select the bell wires 17 and 18 corresponding to the alarm line to close the switch contact of the district bell selection circuit 20. However, since the operation of the district bell is stopped by operating a switch, the switch contact of the district bell stop circuit 19 remains open. That is, as shown in Fig. 3a, when it is determined that a fire has been received, the process proceeds to block b, and since the district bell has not been canceled, the process proceeds to discrimination block c, which indicates that this is the first fire alarm. The process then proceeds to block f to implement fire reception processing, and other fire reception processing is executed while the district bell is stopped.

Next, based on the fire alarm from the receiver 1, the staff rushes to the area where the fire occurred and, if they are able to confirm the occurrence of a fire, press the manual fire transmitter 9 installed near the fire detector 6a. When the button is operated, the operation switch 10 is turned on, and line current flows through the power signal line 3 and the common line 4, which activates the receiving relay 14 of the receiver 1. At the same time, the The signal oscillator 11 operates and sends an AC signal of a pre-assigned frequency to the receiver, and the fire signal and unique signal from the manual fire transmitter 9 are received by the fire receiving section 21 shown in FIG. 2, and the control section 15 given to.

In response to receiving the fire signal from the manual fire transmitter 9, the district bell stop cancellation processing section 24 makes a decision in the decision block d, since a fire alarm has been previously reported by the fire detector 6a, in the decision block c of FIG. The process proceeds to block e, where it is determined whether a fire signal has been received from the manual fire transmitter 9, and the stoppage of the district bell is canceled at block e. That is, by the processing output of the district bell stop cancellation processing unit 24 in the control unit 15 in FIG. will force the switch contact to close. As a result, power is supplied from the bell power supply 25 to the district bell 16, and the district bell 16
sounds.

Therefore, when you rush to the scene and confirm a fire, you can ring the district bell by operating the manual fire transmitter 9 installed nearby, and the receiver 1
There is no need to go back and cancel the district bell suspension.

In addition, as mentioned above, the bell stop is canceled when the AND output of the fire signal from the fire detector and the manual fire transmitter is obtained. Even if the fire transmitter is switched on, the district bell will not ring.

Furthermore, in the event of a fire, when a fire signal is first received by the switch operation of the manual fire transmitter 9, the fire detector installed near the manual fire transmitter will always be activated without any special switch operation. Since it begins to output a fire signal,
When the reception logical product of the manual fire transmitter and the fire detector is obtained, the stoppage of the district bell is canceled and the district bell automatically rings.

Next, to explain the effect of the present invention, even if the receiver performs the operation to stop the district bell in order to prevent confusion caused by the activation of the district bell when receiving a fire signal from a fire detector, the system will not rush to the scene of a fire. After confirming the fire, if you operate the manual fire transmitter installed in the area where the fire occurred, the receiver will automatically cancel the stoppage of the district bell and ring the district bell, which will help extinguish the fire. It is possible to completely prevent the delay in the warning from the district bell due to the inability to return to the receiver or to activate the district bell, and to promptly provide evacuation guidance after a fire breaks out. .

[Brief explanation of drawings]

Fig. 1 is a circuit block diagram showing an embodiment of the present invention, Fig. 2 is a block diagram showing an example of the receiver in the embodiment of Fig. 1, and Fig. 3 is a circuit diagram according to the embodiment of Figs. 1 and 2. FIG. 3 is a program flow diagram showing reception processing. 1: Receiver, 2, 3: Power supply signal line, 4: Common line, 5: Repeater, 6a, 6b: Fire detector,
7a, 7b: Unique signal oscillator, 8: Termination resistor,
9: Manual fire transmitter, 10: Operation switch, 1
2: Indicator light, 13, 14: Receiving relay, 15: Control unit, 16: District bell, 17, 18: Bell line, 1
9: district bell stop circuit, 20: district bell selection circuit, 21: signal receiving section, 22: fire reception processing section,
23: Switch input processing section, 24: District bell stop cancellation processing section, 25: Bell power supply.

Claims (1)

[Scope of Claim for Utility Model Registration] A fire alarm device that receives a fire signal from a fire detector installed in a terminal or a manual fire transmitter with a receiver and rings a district bell installed in a corresponding district, comprising: fire detection means for detecting a logical product output of a received signal of the manual fire transmitter and a received signal of the manual fire transmitter; and a district bell stop switch provided in the receiver based on the detection output of the fire detection means. A fire alarm device comprising a release means for releasing a stopped state.