JPH0543159B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a storage type fire alarm device that accumulates fire signals from a fire detector for a predetermined period of time on a fire receiver side and issues a fire alarm.

(Prior art) Conventionally, in this type of storage type fire alarm system, a sensor line is drawn out from a fire receiver for each alarm area, one or more fire detectors are connected to each sensor line, and a fire alarm is detected. When a detector generates an alarm and outputs a fire signal, the fire reception circuit of the corresponding sensor line receives the fire signal and activates the storage control circuit, and the storage control circuit starts the storage operation after a predetermined period of time has elapsed. Accumulated output is generated, and the activated fire detection is restored by temporarily cutting off the power supply to the sensor line. If a fire signal is received again after the restoration is canceled, it is determined that it is a real fire and a fire alarm signal is issued. I am trying to output .

(Problem to be Solved by the Invention) However, in such a conventional storage-type fire alarm device that performs storage on the receiver side, the storage operation is not performed when a fire signal is received for all sensor lines. However, depending on the warning area where fire detectors are installed, it may be required to immediately issue a fire alarm without taking any fire action when a fire signal from the detector is received. be. In addition, in cases where a fire signal is output by pressing a button in the event of a fire, such as a fire transmitter, or in cases where the sensor itself has a storage function, storage on the receiver side is not necessary, and all sensors Uniformly performing the storage operation for each line may not be compatible with actual equipment conditions where the types of detectors and installation conditions are different, or where fire transmitters are installed.

(Means for Solving the Problems) The present invention has been made in view of such conventional problems, and it is possible to separate lines that require storage operation and lines that do not require storage operation on the receiver side. It is an object of the present invention to provide a storage type fire alarm device which can be selected arbitrarily and can perform storage reception and non-storage reception according to the actual equipment situation.

In order to achieve this object, the present invention includes an accumulation control circuit that performs an accumulation operation upon receiving a received signal from a fire receiving circuit, and an accumulation control circuit that cancels the accumulation operation of this accumulation control circuit and immediately outputs a fire alarm signal. A storage release circuit is provided in the receiver, and all of the reception outputs of the fire reception circuit provided for each of the plurality of sensor lines are connected to the storage control circuit as input, and the storage release circuit is connected to the storage control circuit. By selectively inputting and connecting only the receiving output of the fire receiving circuit of the fire receiving circuit of the specific sensor line that is not used as an input, the receiving signal is input to the storing release circuit.The selection switch installed in each circuit to be connected allows easy storage reception and non-storage reception. This allows you to choose from.

(Embodiment) FIG. 1 is a circuit block diagram showing an embodiment of the present invention.

First, to explain the configuration, 1 is a fire receiver, and a plurality of sensor lines 2a, 2b...2n and a common line 3 are led out from the fire receiver 1 to the warning area, and each of the sensor lines 2a to 2n Fire detectors 4a to 4n are connected between the common line 3 and the common line 3.
In addition, in this embodiment, the sensor lines 2a to
Fire transmitters 5a to 5n, which send out a fire signal when a push button is pressed in the event of a fire, are also connected between the fire alarm 2n and the common line 3. Of course, the number of fire detectors and fire transmitters is not limited to one, and a plurality of fire detectors and fire transmitters may be connected in parallel to one detector line as required.

Fire receiver 1 compatible with detector lines 2a to 2n
Fire receiving circuits 6a, 6b, ... 6n are provided on the sides. For example, if we take a fire detector 4a connected to the detector line 2a, when the fire detector 4a detects a fire, the detector line 2a and the common line are connected. A fire signal is sent to the receiver 1 by passing a predetermined alarm current between 3 and 3, and the received signal, that is, the alarm current, activates the fire reception circuit 6a to activate, for example, a fire reception relay. become. In addition, sensor lines 2a to 2
Output lines 7 of fire transmitters 5a to 5n connected to
Transmitter receiving circuits 8a to 8n are provided in the fire receiver 1 corresponding to the fire transmitters 5a to 7n, and receive the fire signals output by pressing the buttons of the fire transmitters 5a to 5n, for example, fire reception relays. I am trying to make it work.

The receiving circuit of the fire receiver 1 receives constant power supply stabilized by a constant voltage circuit 9, and the positive side of the constant voltage circuit 9 is connected to a recovery switch 10.
and the fire reception circuits 6a to 6n and the transmitter reception circuit 8a through the relay contact 11a of the recovery relay 11.
~8n, and supplies power to each sensor line 2a~2n via these. Further, the fire receiver 1 is provided with an accumulation control circuit 12.

This accumulation control circuit 12 operates by receiving power from the constant voltage circuit 9 at terminals P1 and P2, and includes a timer circuit 13 that performs an accumulation control operation, a recovery detection circuit 14 that detects an off operation of the recovery switch 10, and a timer circuit 13 that performs an accumulation control operation. OR gate 15 and AND gate 16 that output a fire alarm signal based on the accumulated output of circuit 13
and an RS flip-flop 17, and an oscillation circuit 18 for oscillating a clock pulse for causing the timer circuit 13 to perform an accumulation operation.

To explain in more detail, as the timer circuit 13, for example, a counter that counts clock pulses from the oscillation circuit 18 is used.
has inputs a, b, and c, and when it receives a fire signal at input a, it starts the counting operation of the built-in counter, and when a predetermined accumulation time has elapsed, it temporarily activates the recovery relay 11 at output A. Outputs a pulse signal for a certain period of time. After the recovery relay operates, the output B outputs an accumulation signal (H level) for a certain period of time, and during the accumulation operation where the counter is counting, the output C indicates that the accumulation is in progress. A signal (L level) is output, and an accumulation indicator lamp 19 consisting of a light emitting diode externally connected between terminals P7 and P10 is turned on at output C during accumulation. In addition, the input b of the timer circuit 13
is a reset input, and a fire alarm signal, which is the output of the recovery detection circuit 14 and the Q output of the RS flip-flop 17, is connected to the reset input b via a diode OR. The Q output of the flip-flop 17 is received to reset the timer, that is, to reset the built-in counter. Furthermore, the input C of the timer circuit 13 is an input terminal for canceling accumulation. When there is an H level input to the accumulation release input terminal C, the timer circuit 13 does not perform the accumulation operation even if a fire signal is received at the input a, and the accumulation release state is maintained.

The output B of the timer circuit 13, that is, the output B that outputs the accumulation signal when the operation of the recovery relay of the accumulation operation is completed, is inputted to one side of the AND gate 16 via the OR gate 15.
When a fire signal is received at the other input of the AND gate 16 while the accumulation signal is being obtained from the output B of the AND gate 16, the AND gate 16 generates an H level output, sets the RS flip-flop 17, and sets Q=H level to issue a fire alarm. Output a signal. Further, the other input of the OR gate 15 is given an accumulation release signal for the input C of the timer circuit 13.

The Q output of the RS flip-flop 17, that is, the fire alarm signal, is given to the alarm drive circuit 20 from the terminal P9, and the output of the alarm drive circuit 20 is connected to the bell wire 2.
1 to an alarm bell 22 installed in the warning area, and further connected to interlocking equipment 24 such as smoke exhaust doors, fire doors, fire extinguishing equipment, etc. that are operated in conjunction with the fire alarm via a control line 23. ing.

On the other hand, for the terminal P3 connected to the input a of the timer circuit 13, the relay contacts 30a, 30b of the fire reception relays provided in the fire reception circuits 6a to 6n,
...30n are connected in parallel, and when any of the relay contacts 30a to 30n of the fire reception relay closes, the fire reception signal is supplied to the input a of the timer circuit 13 via the terminal P3, and the timer circuit 13 performs an accumulation operation. I'm trying to get it started.

Furthermore, input C (accumulation release input) of the timer circuit 13
The relay contact 40 of the receiving relay provided in the transmitter receiving circuits 8a to 8n
Relay contacts 40a to 40n are connected in parallel and do not require accumulation for fire signals from fire transmitters 5a to 5n.
40n closes, the timer circuit 13
A fire reception signal as an accumulation release signal is supplied to the input C of the terminal P4 to cancel the accumulation operation, and the fire reception signal from the terminal P4 is simultaneously input to one side of the AND gate 16, and in this state, the fire detection signal from the terminal P3 is When a fire detection signal is obtained through the OR gate 15, the RS flip-flop 17 is set to output a fire alarm signal to the terminal P9. Incidentally, in response to a fire signal from the fire transmitters 5a to 5n, a fire alarm signal may be directly output by closing the relay contacts 40a to 40n.

Next, in the storage type fire alarm device of the present invention, in order to enable the selection of storage operation and non-storage operation by the sensor line, the terminal P3 is connected to the timer circuit 13 for starting the storage operation. The fire reception signal is connected to a terminal P4 for selectively applying accumulation release to the timer circuit 13 for each sensor line.

That is, in the embodiment of FIG. 1, a case is shown in which non-storage operation is selected for two sensor lines 2a and 2b, and sensor line 2
The output side of the relay contact 30a of the fire reception relay of the fire reception circuit 6a corresponding to a is connected to the diode 32.
a to terminal P4, and sensor line 2
Relay contact 30b of fire reception relay corresponding to b
The output side of is also connected to the terminal P4 via the diode 32b. In addition, diodes 34a, 3 are connected to the terminal P3 of the relay contacts 30a, 30b of the fire reception relay connected to the terminal P4 via the diodes 32a, 32b.
4b is connected. Here, the diodes 32a, 3
2b, 34a, 34b are fire transmitters 5a to 5n
The relay contacts 40a to 40n are provided in order to prevent backflow of the fire reception signal from going around to the terminal P3 when the relay contacts 40a to 40n are closed.

Next, the operation of the embodiment shown in FIG. 1 will be explained. First, the accumulation operation will be described when the fire detector 4n installed in the sensor line 2n which has selected the accumulation operation detects a fire.

Fire detector 4n detects a fire and sensor line 2
When an alarm current is passed between the common wire 3 and the fire receiving circuit 6n, the fire receiving circuit 6n receives the fire signal, activates the fire receiving relay, and closes the relay contact 30n. Therefore, the fire reception signal is supplied to the terminal P3 of the storage control circuit 12, and upon receiving the fire reception signal at the input a of the timer circuit 13, the timer circuit 13 starts the storage operation by counting clock pulses from the oscillation circuit 18. When the timer circuit 13 starts the accumulation operation, an L level output is generated at the output C, and the accumulation indicator lamp 19 connected between terminals P7 and P10 is lit to indicate that accumulation is in progress. When the timer circuit 13 starts the accumulation operation and reaches a preset predetermined time, an H level output is temporarily generated at the output A, and the recovery relay 11 connected to the terminal P6 is activated to temporarily close the relay contact 11a. The fire detector 4n is opened and the power supply to the detector lines 2a to 2n is cut off to restore the activated fire detector 4n. Of course, when the accumulation time has elapsed, the accumulation signal that becomes H level is output to the output B of the timer circuit 13, and the accumulation signal becomes H level via the OR gate 15.
is the permissible state.

When the recovery relay 11 for restoring the activated sensor 4n returns to the inactive state, its relay contact 11a closes and power is supplied to the sensor line again. If it is hot, fire detector 4 will receive power again after restoration.
n outputs the fire signal again, the relay contact 30n of the fire reception relay closes, and the fire reception signal from terminal P3 is passed through the AND gate 16 which is in the allowable state.
The RS flip-flop 17 is set to output a fire alarm signal of Q=H level to the alarm drive circuit 20 via the terminal P9, so that the alarm drive circuit 20 operates the district bell 22 and the interlocking equipment 24. Become.

Further, the Q output of the RS flip-flop 17 is given as a reset signal to the input b of the timer circuit 13, and even if a new fire signal is received after a fire has been determined by the accumulation operation, the accumulation operation will not be performed.

Next, fire detection by the fire detector 4a of the sensor circuit 2a in which non-storage operation is selected will be explained.

When the fire detector 4a detects a fire and outputs a fire signal, the fire reception relay of the fire reception circuit 6a is activated and its relay contact 30a is closed. When the relay contact 30a closes, the terminal P of the accumulation control circuit 12
At the same time, the fire reception signal is supplied to the terminal P4 connected to the output of the relay contact 30a via the diode 32a. Therefore, when the relay contact 30a closes, both terminals P3 and P4 receive the fire reception signal, and the fire signal to the input C becomes an accumulation release signal, so that the timer circuit 13 does not perform an accumulation operation. On the other hand, the fire signal from the terminal P is input to one side of the AND gate 16, and the fire signal from the terminal P4 is input to the AND gate 16 via the OR gate 15.
Therefore, the AND gate 16 generates an H level output due to the fire reception signal to the terminals P3 and P4, sets the RS flip-flop 17, and outputs the fire alarm signal of Q=H level to the terminal P9.
is output to the alarm drive circuit 20 via the district bell 2.
2 and the interlocking device 24 are activated at the same time as the fire signal is received.

For non-accumulation operation when such a fire signal is received, the output side of the relay contact 30b is connected to the diode 3.
Sensor line 2b connected to terminal P4 via 2b
This is done in the same way.

FIG. 2 is a circuit showing another embodiment of the circuit for selecting accumulation operation and non-accumulation operation used in the present invention.

In the embodiment shown in FIG. 2, the relay contacts 30a to 30n of the fire reception relay are connected in parallel to the terminal P3 (storage operation input) of the storage control circuit 12.
It is characterized in that selection switches 50a to 50n are provided to each of the circuits that connect the output side of the circuit to terminal P4 (accumulation release input) via diodes 32a to 32n. Lock-type switches are used as the selection switches 50a to 50n, and when the selection switches 50a to 50b are closed as shown in the figure, the fire signal from the corresponding sensor line can be set to non-accumulation operation, and the selection switches 50a-50
By opening b, the fire signal from the corresponding sensor line can be stored.

In the embodiment in which the selection switches 50a to 50n shown in FIG. By selecting ON/OFF of ~50n, it is possible to freely select storage operation or non-storage operation of the sensor line.

(Effects of the Invention) As described above, according to the present invention, there is provided an accumulation control circuit which performs an accumulation operation upon receiving a received signal from a fire receiving circuit, and a fire alarm immediately after canceling the accumulation operation of this accumulation control circuit. The receiver is equipped with an accumulation release circuit that outputs a signal, and all of the reception outputs of the fire reception circuit provided for each of the plurality of detector lines are connected to the accumulation control circuit as an input, and the accumulation release circuit is connected to the accumulation control circuit. In this case, only the reception output of the fire reception circuit of the specific sensor line that does not require storage is selectively connected to the input, so it is possible to distinguish between storage reception and non-storage reception depending on whether or not the fire reception signal is connected to the storage release circuit. Depending on the equipment situation, you can install a fire detector that requires immediate output of a fire alarm signal without performing storage reception, or the fire detector itself has a storage function, or Even if the receiver is equipped with a fire transmitter that outputs a fire signal by pressing a button, the receiver can freely set storage reception and non-storage reception depending on the situation in the warning area and the type of detector used. ,
Appropriate reception functions can be selected depending on the state of the guarded area and the type of sensor.

Since the selection switch is provided in advance for each sensor line, it is possible to easily select and set the storage operation and the non-storage operation.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram showing one embodiment of the present invention, and FIG. 2 is a circuit diagram showing another embodiment in which storage reception and non-storage reception are selected. 1: Fire receiver, 2a-2n: Detector line,
3: Common wire, 4a~4n: Fire detector, 5a~
5n: Fire transmitter, 6a to 6n: Fire receiving circuit,
8a to 8n: transmitter receiving circuit, 9: constant voltage circuit,
10: Recovery switch, 11: Recovery relay, 12:
Accumulation control circuit, 13: timer circuit, 14: recovery detection circuit, 15: OR gate, 16: AND gate, 17: RS flip-flop, 18: oscillator,
19: Accumulation indicator light, 20: Alarm drive circuit, 21:
Bell line, 22: District bell, 23: Control line, 24:
Interlocking equipment, 30a-30n: Relay contacts of fire reception relay, 32a-32n, 34a-34n: diodes, 40a-40n: Relay contacts of transmitter reception relay, 50a-50n: selection switch.

Claims (1)

[Claims] 1. One or more fire detectors are connected to each of a plurality of detector lines drawn out from a receiver, and a fire signal from the fire detector is received for each detector line. A fire detection circuit is provided, and when a fire signal is received by any of the fire detection circuits, the power supply is temporarily cut off after the signal is activated and accumulated for a predetermined period of time, and the activated fire detector is temporarily restored. Each sensor line is provided with one accumulation control circuit that determines that there is a fire and outputs a fire alarm signal when a fire signal is received again by any of the fire receiving circuits within a predetermined time after release. In the storage type fire alarm device, the fire receiver includes an accumulation release circuit that receives a fire reception signal at an input terminal, cancels the accumulation operation of the accumulation control circuit, and outputs a fire alarm signal, and the accumulation release circuit. A selection switch is provided for each of the circuits to which the fire reception signal of each sensor line is input and connected to the input terminal of the sensor line, and by opening and closing the selection switch, the storage operation and non-storage operation of the corresponding sensor line can be selected and set. A storage type fire alarm device characterized by: