JPH06282771A - Automatic fire alarm equipment - Google Patents

Abstract

PURPOSE:To provide an automatic fire alarm equipment which can surely actuate a sectional acoustic device for its ringing. CONSTITUTION:An automatic fire alarm equipment includes plural sensor detectors Det1-Detn, plural transmitters P1-Pn, a sectional acoustic device B which produces the ringing tones by the ringing signals, and a receiver RE which monitors the sensor detectors and transmitters to produce an alarm signal when a fire signal is detected from either one of those detectors or transmitters and also to supply an acoustic signal to the device B. The receiver RE contains a ringing stop function circuit STP which stops the supply of acoustic signal to the device B, and a function cancel circuit which cancels the operation of the circuit STP only when a fire signal is already received from one of sensor detectors when a fire signal is received from one of transmitters.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic fire alarm system capable of canceling ringing stoppage of a district audio system on the district side.

[0002]

2. Description of the Related Art An automatic fire alarm system of this type is provided with a plurality of sensors provided in a security zone, a plurality of transmitters provided in the security zone, and an area sound which is provided in the security zone and sounds by a ringing signal. Monitor the device and the sensor and transmitter,
It is known to provide a receiver that can provide an alarm and display when a fire signal from the sensor or transmitter is detected and at the same time supply an acoustic signal to the district audio device.

In such an automatic fire alarm system, a district sound device (bell) provided in each warning area is designed to ring in response to a fire signal from a detector or a transmitter, The sound could be stopped by the district sound stop switch provided on the machine. For this reason,
Once the sound was stopped by the district sound stop switch, the district sound device did not re-ring even if a fire signal was input from another warning area or the like. In order to eliminate such inconvenience, even if the district sound stop switch is set to the ringing stop state, when the fire signal from another sensor is received, the system that automatically re-rings the district sound device is adopted. A fire alarm system has been proposed (see Japanese Patent Laid-Open No. 64-7193).

However, in the case of this automatic fire alarm system, when the district sound stop switch is in the ringing stop state, even if a fire is actually generated and the transmitter in the area is pressed, the district sound device re-rings. No, it did not re-ring until the detectors in the other warning zones detected a fire. For this reason, there is an adverse effect such as a delay in fire notification.

Therefore, even when the district sound stop switch is in the ringing stop state, it does not ring when a fire signal from another detector is received, but when the fire signal from the transmitter is received, An automatic fire alarm system has been proposed that forces the sound device to re-ring (Actual fair 4-3).
1673).

[0006]

However, in the above-mentioned conventional automatic fire alarm system, since the stop function of the district sound stop switch is forcibly released by the fire signal from the transmitter, When the transmitter is operated by mischief, the district sound device re-rings unconditionally, so there is a drawback that a panic condition occurs in the fire prevention target. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks and provide an automatic fire alarm system capable of accurately and reliably ringing a district audio system.

[0007]

In order to achieve the above object, the automatic fire alarm system according to the invention of claim 1 is provided with a plurality of detectors provided in a security zone and a plurality of sensors provided in the security zone. Of the transmitter, the district sounding device that is provided in the warning area and sounds by a ringing signal, the detector and the transmitter, and warns when a fire signal from the detector or the transmitter is detected. In addition, in the automatic fire alarm equipment equipped with a receiver capable of supplying an acoustic signal to the district audio device at the same time as displaying, a ringing stop function circuit for stopping the acoustic signal supplied to the district audio device and a fire from the transmitter When a signal is input, a function canceling circuit that cancels the function of the ringing stop function circuit only when the fire signal from the sensor has already been received is provided.

According to the second aspect of the present invention, in the automatic fire alarm system, the function canceling circuit is used when a fire signal from a plurality of transmitters is received, or when a fire signal from a transmitter and a detector are used. When the fire signal is received, the ring stop function circuit can be released from the function.

[0009]

According to the present invention, when the fire signal from the transmitter is input, the fire signal is input and the ringing stop function is premised on the assumption that the fire signal from the sensor is present at least before that. If the district sound stop switch is operated while the circuit is operating, the operation of the ring stop function circuit should be canceled only when the fire signal already input is from the detector. I am trying to ring the district audio system.

According to the second aspect of the present invention, when at least two fire signals are received almost at the same time, the fire signal from the transmitter may be sent before or after the fire stop function circuit is operated. Alternatively, a fire signal from the sensor can cancel the operation of this ring stop function circuit.

[0011]

The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a circuit diagram showing an embodiment of the automatic fire alarm system of the present invention. In FIG. 1, the automatic fire alarm system includes a plurality of detectors Det ₁ and Det provided in a warning area.
_2, ..., Det _n, a plurality of transmitters P ₁ provided in the security area, P _2, ..., and P _n, is provided in the security area, the local sound unit B for ringing the ringing signal, the Sensors Det ₁ , Det ₂ , ..., Det _n , transmitters P ₁ , P ₂ ,
..., P _n and is monitored, and the detectors Det ₁ , Det ₂ , ...,
Det _n or transmitters P ₁ , P ₂ , ..., P _{n When} a fire signal is detected, an alarm and display are provided, and at the same time, a receiver RE capable of supplying an acoustic signal to the district acoustic device B is provided. .

Further, the detectors Det ₁ , Det ₂ , ..., Det
Each one terminal of _n has lines Ld ₁ , Ld ₂ , ..., Ld _n
Are respectively connected to the receiver RE. Also,
One terminal of each of the transmitters P ₁ , P ₂ , ..., P _n is connected to the receiver RE via a response line La. Further, one terminal of the district audio device B is connected to the receiver RE via the acoustic line Lb. In addition, each sensor Det ₁ , Det
_2, ..., Det _n, each transmitter P _1, P _2, ..., the other terminal of the P _n, and local sound unit B is connected to the receiver RE via the common line Lc.

Further, the receiver RE has resistors R ₀ to R ₀ .
R ₁₃ , capacitors C ₁ and C ₂ , transistor Q ₁ ~
Q ₃ , flip-flops FF ₁ and FF ₂ , gate circuit G
t, relays Ra ₁ , Ra ₂ , ..., Ra _n , R _opm , light emitting diodes LD ₁ , LD ₂ , ..., LD _n , LD _P , LD
_f , LD _stp , recovery switch SW _ret , district sound stop switch SW _stp , and battery Btt.

Further, the receiver RE constitutes a normal receiving circuit using the above-mentioned parts, and a ringing stop function circuit STP for stopping the acoustic signal supplied to the district audio apparatus B.
And when a fire signal from one of the transmitters P ₁ , P ₂ , ..., P _n is input, the detectors Det ₁ , Det have already been input.
₂ , ..., A function canceling circuit RT that cancels the function of the ringing stop function circuit STP only when a fire signal from Det _n is received.

These circuits are constructed by the above parts as follows. The lines Ld ₁ , Ld ₂ , ..., Ld _n are
Each relay _{Ra 1, Ra 2, ...,} Ra n, is connected to the positive pole of the battery Btt through the recovery switch SW _ret. In addition, the response line La, the contact r of the relay _{R opm} opm1
And a series circuit of the resistor R ₁ and the resistor R ₂ in series, and the recovery switch SW _ret, and is connected to the positive pole of the battery Btt. In the transistor Q ₁ , the emitter is connected to the restoration switch SW _ret , the base is connected to the connection point of the resistors R ₁ and R ₂ , and the collector is connected to the common line Lc via the relay R _opm . The common line Lc is connected to the negative pole of the battery Btt.

The contact r _opm2 of the relay R _opm is connected between the emitter and collector of the transistor Q ₁ .

The lines Ld ₁ , Ld ₂ , ..., Ld _n are also connected to the contact point r _a11 of the relay Ra ₁ , the resistor R ₃ , the series body of the light emitting diode LD ₁ , and the contact point r _a21 of the relay Ra ₂ and the resistor R _4. Series body of light emitting diode LD ₂ , ..., Relay Ra
It is connected to the common line Lc via a contact point r _{an1 of n} , a resistor R _5, and a series body of the light emitting diode LD _n .

Further, the relays Ra ₁ , Ra ₂ , ..., Ra _n
The contacts r _a12 , r _a22 , ..., R _{an2 of} are connected to the power supply terminal V _DD and one input terminal of the gate circuit Gt to form an acoustic signal supply circuit. The output terminal of the gate circuit Gt is
It is connected to the common line Lc via resistors R ₁₁ and R ₁₂ .
The base of the transistor Q ₂ is the resistors R ₁₁ and R
_The emitter is connected to the common line Lc, and the collector is connected to the base of the transistor Q ₃ via the resistor R ₁₃ at the connection point of ₁₂ . The transistor Q ₃ has a collector connected to the acoustic line Lb and an emitter connected to the positive pole of the battery Btt via the restoration switch SW _ret . As a result, the acoustic signal supply circuit is configured.

The ring stop function circuit STP comprises a D-type flip-flop FF ₂ , a resistor R ₀ and a district sound stop switch SW.
_stp , gate circuit Gt, resistor R ₁₀ , light emitting diode LD
_{It has stp} and has the following circuit configuration. Power supply V _DD
Between the sound line and the common line Lc, the district sound stop switch SW _stp
And a resistor R ₀ are connected in series, and the connection point between the district sound stop switch SW _stp and the resistor R ₀ is connected to the clock terminal T of the flip-flop FF ₂ . The inverting output terminal HQ of the flip-flop FF ₂ is connected to the input terminal D and the other input terminal of the gate circuit Gt, and the output terminal Q is connected to the common line Lc via the resistor R ₁₀ and the light emitting diode LD _stp. It is connected.

The function release circuit RT includes resistors R _{6 to} R ₉ , capacitors C _{1 and} C ₂ , a D-type flip-flop FF ₁ , and light emitting diodes LD _P and LD _f, and is configured as follows. . Relay R _opm contact r _opm3 , resistance R ₆ ,
The series body of the light emitting diodes LD _P has a power source V _DD and a common line L.
It is connected between C and its resistance R ₆ and contact r _opm3
Is connected to the clock terminal T of the flip-flop FF ₁ . One input terminal of the gate circuit Gt is connected to the common line Lc via a series body of the resistor R ₇ and the light emitting diode LD _f , and the connection point between the input terminal and the resistor R ₇ is connected via the resistor R _8. It is connected to the input terminal D of the flip-flop FF ₁ . This input terminal D is a capacitor C
It is connected to the common line Lc via ₁ . The inverting output terminal HQ of the flip-flop FF ₁ is connected to the reset terminal R of the flip-flop FF ₂ via the capacitor C _2, and the reset terminal R is connected to the power supply V _DD via the resistor R ₉ . .

The operation of the embodiment thus configured will be described. Detector Det _1, Det _2, ..., if any of Det _n is alarm, the line Ld _1, Ld _2, ..., district relay Ra _1, Ra ₂ of Ld _n, ..., those of the relevant Ra _n close. As a result, the district indicator lights LD ₁ , LD ₂ , ..., L
Since the relevant one of D _n emits light and the display current is _equal to or more than the holding current of the relay, the relevant self contact r _a1 , r
By the action of _a21 , ..., R _an1 , the relays Ra ₁ , R a
It is possible to hold a ₂ , ..., Ra _n .

For example, when the relay Ra ₁ is excited, the contact r
_{When a11} and r _a12 are closed, the district sound stop switch SW
_{If stp} is not closed, the output signal of this contact r _a12 turns on transistor Q ₂ through gate circuit _{G t} . As a result, the transistor Q ₃ is turned on, and the acoustic signal causes the district acoustic device B to ring through the acoustic line Lb. At this time, at the same time, the fire display light emitting diode LD _f emits light. In addition, here
Since the main audio device is not shown, the main audio device can also be activated by connecting it in parallel with the fire lamp LD _f (although a stop circuit for the main audio device is naturally required, in the present invention, the main audio device is mainly used. Since this is related to the ringing of the device B, this will be omitted).

[0023] When the district acoustic stop switch SW _stp is operated, since the positive pulse is input to the clock terminal T of the flip-flop FF _2, the flip-flop FF ₂ is set, the inverting output terminal HQ is "0" Then, the gate circuit Gt is closed. As a result, the transistor Q ₂ is turned off and the transistor Q ₃ is also turned off, so that no acoustic signal is output and the ringing of the district audio device B is stopped. In this case, in order to indicate that the district sound stop switch SW _stp is in the operating state, the output signal of the output terminal Q of the flip-flop FF ₂ is applied to the district sound stop lamp LD _stp to light it.

Even in the normal monitoring state, when the district sound stop switch SW _stp is operated, the flip-flop FF ₂ is set, so that the gate circuit Gt is closed. Device B does not ring.

[0025] When the flip-flop FF ₂ is in the set state, and operates the local sound stop switch SW _stp, since "0" is input to the input terminal D of the flip-flop FF _2, the flip-flop FF ₂ is reset It As a result, the inverting output terminal HQ of the flip-flop FF ₂ becomes “1”, the gate circuit Gt opens, and if there is a fire, the relays Ra ₁ , Ra ₂ , ..., Ra _n.
Since any one of the contacts r _a12 , r _a22 , ..., R _an2 is closed, an acoustic signal is output, and the district audio device B _rings .

Here, it is assumed that the district sound stop switch SW
_{If the} flip-flop FF ₂ is in the set state by _stp, it is assumed that a fire signal is input from the detector Det _{1 at} this time. Then, the district indicator LD ₁ lights up and the main audio device (not shown) sounds, but the district audio device B does not sound because the gate circuit Gt is closed.

Further, for example, the transmitter P ₁ is, for example, when a previously engineered to than sensor Det _1, depending transmitter P _1, with the relay Ra ₁ connected to the line Ld ₁ is energized, the battery Btt Are resistors R ₁ and R ₂ and response line L
a, short-circuited via the common line Lc. This turns on the transistor Q ₁ to excite the relay R _opm .
Accordingly, the relay R _opm is excited state self contacts r _OPM2 of the relay R _opm is closed. Further, since the contact point r _opm2 is closed, the transmitter operation representative lamp LD _P is turned on. at the same time,
District indicator light LD ₁ and fire indicator light LD _f also light up.

[0028] However, contact r of the relay _{R opm} opm3
Although a positive pulse due to is input to the clock terminal T of the flip-flop FF ₁ , a signal is input to the input terminal D via the delay circuit composed of the resistor R ₈ and the capacitor C ₁ . wherein the input terminal D at the same time is "0", never flip-flop FF ₁ is set. Therefore, since the flip-flop FF ₂ is not reset, the gate circuit Gt remains closed, and no acoustic signal is output. This means that even if the transmitters P ₁ , P ₂ , ..., P _n are operated by mischief, if the district sound remains stopped, the district sound device B
Does not ring, which means that you can avoid a panic situation.

On the other hand, before the transmitter P is operated, when the detector Det is operated and the fire signal is input to any line including the same line as the transmitter P, the transmitter P
When the contact r _OPM3 response relay R _opm of is closed already, district relay Ra _1, Ra _2, ..., since one of the Ra _n is operating, the resistance R ₈ · capacitor C
_The delay circuit consisting of ₁ does not work, and the flip-flop FF ₁
Therefore, "1" is input to the input terminal D of. As a result, when a positive pulse due to the closing of the contact r _opm3 is input to the clock terminal T, the flip-flop FF ₁ is set. As a result, the inverting output terminal HQ of the flip-flop FF ₁ is inverted from “1” to “0”, so that the signal passes through the differentiation circuit composed of the resistor R ₉ and the capacitor C ₂
It is input to the reset terminal R of F ₂ . As a result, the flip-flop FF ₂ is forcibly reset, the gate circuit Gt is opened, and the district audio apparatus B sounds even though the district bell is stopped.

That is, in the present embodiment, without being near the receiver RE, the user can check the area where the fire signal is input while being in the warning area, and if it is an actual fire, without returning to the receiver RE, This has the advantage that the district sound device B can be activated. In this embodiment, the transmitters P ₁ , P ₂ , ...,
Although the example in which the response line La of P _n has only one line has been described, there may be a plurality of response lines La. When there are a plurality of response lines La, the clock terminal T of the flip-flop FF ₁
In addition, a positive pulse from the contact r _opm3 of the transmitter response relay R _opm may be input via the logical sum circuit.

In the above embodiment, the transmitters P ₁ ,
P _2, ..., before the P _n is operated, on condition that another fire signal is input, but was to cancel the ringing stops the district sound device B, transmitter P ₁ by mischief ，
Operation of P ₂ , ..., P _n and detectors Det ₁ , Det ₂ ,.
Since establishing the fire signal Det _n are simultaneously generated is extremely small, the transmitter _{P 1, P 2, ...,} P n is operated earlier, further detector _{Det 1, Det 2, ...,} Det n has operated It is also possible to cancel the stop of ringing of the district audio device B at times.

This means that at least the transmitters P ₁ , P ₂ ,
..., since it is necessary to fire signals engineered non line Line of P _n, using a counter of at least two bits, each district line Ld _1, Ld _2, ..., a logical sum circuit a detection signal Ld _n It can be realized by inputting to the counter via the counter, taking the logical product of the output of this counter and the signal of the transmitter operating representative lamp LD _P , and inputting the logical product signal to the clock terminal T of the flip-flop FF _1. .

[0033]

As described above, according to the first aspect of the present invention, the sound release state of the district audio device is not released by the fire signal of the transmitter alone. Therefore, the involuntary district audio stop due to mischief is released. There is an effect that can prevent falling into a panic state.

According to the first aspect of the present invention, even if a plurality of fire signals are issued due to a fire or the like at the boundary of a plurality of warning zones, the ringing stop of the district audio device in the ringing stop state is released. There is no.

Further, in the invention according to claim 2, when at least two fire signals are received substantially at the same time,
Even if the district audio device is in the ringing-released state, the ringing-released state can be released, so that the district audio device can be reliably ringed.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of an automatic fire alarm system of the present invention.

[Explanation of symbols]

Det ₁ , Det ₂ , ..., Det _n sensor P ₁ , P ₂ , ..., P _n transmitter RE receiver STP ring stop function circuit RT function release circuit

Claims (2)

[Claims] 1. A plurality of sensors provided in a security area, a plurality of transmitters provided in the security area, a regional sound device which is provided in the security area and sounds by a ringing signal, and the sensor. , An automatic fire alarm system equipped with a receiver capable of monitoring a transmitter and alarming and displaying when a fire signal from the detector or the transmitter is detected and simultaneously supplying an acoustic signal to the district audio device. , A ringing stop function circuit for stopping the acoustic signal supplied to the district audio device, and the ringing only when the fire signal from the transmitter is already input when the fire signal from the transmitter is input. An automatic fire alarm system comprising a function release circuit for releasing the function of a stop function circuit. 2. The automatic fire alarm system according to claim 1, wherein the function canceling circuit receives a fire signal from a plurality of transmitters or a fire signal from a transmitter and a detector. While receiving the fire signal of
An automatic fire alarm system having a circuit configuration capable of canceling the function of the ringing stop function circuit.