JP2811587B2 - Sound sounding circuit of fire receiver - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acoustic sounding circuit of, for example, a fire receiving device, and more particularly to control of a local sound of the acoustic sounding circuit.

[Prior Art] FIG. 3 is a circuit diagram showing an acoustic sounding circuit of a conventional fire receiver disclosed in, for example, Japanese Utility Model Laid-Open Publication No. 63-31488. The configuration and operation of this circuit are as follows. It is.

The receiver (Re) includes the district relays (N1) and (N2) connected to the fire detectors (D1) and (D2) provided for each alert area, and the district relay (N1) , (N2) relay (F) that sounds the local sound (B) in conjunction with the operation
And operates based on the local relays (N1) and (N2),
A re-sound circuit (A) having an RS flip-flop circuit (FF) that is reset by turning on a non-lock type main sound stop switch (Sbm), and "H" of the re-sound circuit (A) A switching circuit (S1) driven by an output to sound a main sound (Z); and a timer circuit (T) operated at the "H" output and generating an output after a set time.
And a switching circuit (S2) driven by the output of the timer circuit (T) to sound a district sound (B) provided for each caution area, and a sounding district sound (B)
Lock type local sound stop switch (Sb
l) is provided.

Next, the operation will be described. When the re-ringing circuit (A) of the receiver (Re) is not operating and the lock type local sound stop switch (Sbl) is turned to the off side, a fire occurs and a fire signal is output. For example, when the fire detector (D1) sends the signal to the receiver (Re), the re-ringing circuit (A) operates and turns on the switching circuit (S1) to turn on the main sound (Z).
Sound. At this time, the timer circuit (T) operated by the operation of the re-sound circuit (A) generates an output after a set time, turns on the switching circuit (S2), and sounds the district sound (B).

If you want to stop the forced sounding district sound (B),
By turning on the non-locking main sound stop switch (Sbm) provided in the re-ring circuit (A), the RS flip-flop circuit (FF) outputting the fire signal is reset. Thereby, the district sound (B) stops.

[Problem to be Solved by the Invention] In the conventional sound ringing circuit of a fire receiver as described above,
When the district sound (B), which is forcibly sounded by the detection of the fire detector (D1), is stopped when the lock-type district sound stop switch (Sbl) is in the off state, a non-lock type main sound stop switch. By turning on (Sbm), the local sound (B) stops, but the sounding main sound (Z) also stops.

The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a sound sounding circuit of a fire receiver that can stop only a district sound without stopping a sounding main sound.

[Means for Solving the Problems] An acoustic sounding circuit of a fire receiver according to the present invention includes a first circuit that energizes and sounds a main sound based on a fire signal;
A latch circuit that normally outputs two signals having different polarities, and inverts and outputs the polarity of those signals each time a signal is input from a local sound stop switch; one signal of the latch circuit and the fire A second circuit for energizing and sounding the area sound based on the signal, and operating based on an energizing signal of the first circuit and an inverted signal of the other signal of the latch circuit;
And a timer for resetting the latch circuit after a set time to return to a steady state.

[Operation] In the present invention, when a fire signal is input to the first circuit and the second circuit of the acoustic sounding circuit, respectively, the first
Circuit activates the main sound based on the fire signal and sounds
The second circuit energizes and sounds the district sound based on the fire signal and one signal from the latch circuit. At this time, when the signal is transmitted by turning on the local sound stop switch connected to the input side of the latch circuit, the latch circuit inverts the level, that is, the polarity of one signal on the output side, and at the same time, reverses the signal on the other side. The polarity is inverted and transmitted. The second circuit connected to the latch circuit stops the sound of the area sound when an inverted signal of one of the signals is input. On the other hand, the timer operates based on the inverted signal of the other signal from the latch circuit and the energizing signal from the first circuit that sounds the main sound, and resets the latch circuit after a predetermined time. Then, the output of the latch circuit returns to a steady state, and the district sound is re-sounded.

Embodiment FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a time chart of the circuit.

In the figure, (DE) is a fire detector connected in parallel for each alert area, and (FR1) is a fire signal receiving circuit provided for each alert area, and a fire signal detection transistor (T11) is used when monitoring a fire. Is in the off state, the outputs of the inverter gate (IV11) and the inverter gate (IV13) are at "L", and the output of the inverter gate (IV12) is at "H". Therefore, no pulse signal is generated from the capacitor (C11), and the district indicator (L1) is off.

(AC) is a storage circuit, which is a D-type flip-flop (DFF2
1) (hereinafter referred to as “D-FF”) and D-FF (DFF22)
The output of the Q is “L” and the output of the D-FF (DFF22) is “H”, so that the heat storage lamp (LG) as the first storage lamp and the smoke as the second storage lamp The storage lamp (LR) is off and the recovery relay (R1) is not energized. The break contact (r1) of the recovery relay (R1) is connected to the power supply side of the fire detector (DE). Further, the frequency divider (21) of the storage circuit (AC) is reset and initialized by the monostable multivibrator (MM) operating with the "H" output of the Q of the D-FF (DFF22), and the oscillator ( twenty two)
, And generates pulse signals having different periods. In addition, O of the fire signal receiving circuit (FR1)
R gates (OR11), (OR12) and AND gates (A11), (A1
2), the inverter gates (IV12) and (IV13), and the OR gate (OR22) of the storage circuit (AC) constitute a self-holding circuit that self-holds the second fire signal.

(AL) is an acoustic sounding circuit. The non-lock type main sound stop switch (Sbm1) and the non-lock type local sound stop switch (Sbl) are both off, and the lock type maintenance sound stop switch (Sbm2) is off. on state and D-FF (DFF3
1), the output of Q of (DFF32) is "L", the output of "H", the output of inverter gate (IV31) is "H" and the output of inverter gate (IV32) is "L", The outputs of the AND gate (A34) and the timer (TM) are in the "L" state. For this reason, the main sound (Z) is in a stopped state,
Main sound stop warning light (Lbm) and district sound stop warning light (Lbl)
Are in the unlit state, and the area sounding relay (R2)
Is in the off state. The make contact (r2) of the district sound ringing relay (R2) turns on or off the ringing of the district sound (B) provided for each caution area.

In this embodiment, the AND gate (A31) and the OR gate (OR31) constitute a first circuit, the D-FF (DFF32) constitutes a latch circuit, and the AND gate (A32) and the relay (R2 ) Constitute the second circuit, and the AND gate (A34) and the timer (TM) constitute a timer.

The operation of the acoustic ringing circuit of the fire receiver configured as described above will be described in the following order.

1.1 Operation by input of fire signal of 2nd report.

2. The operation when the main sound stop switch (Sbm1) is turned on while the main sound (Z) and the area sound (B) are sounding, and the operation when a subsequent fire signal is input from another area in this state.

3. Operation when the local sound stop switch (Sb1) is turned on while the main sound (Z) and the local sound (B) are sounding.

4. The operation when the main sound stop switch (GSbm1) is turned on while the main sound (Z) and district sound (B) are sounding, and then the district sound stop switch (Sb1) is turned on, and in this state, other areas Operation when a subsequent fire signal is input from.

1. Fire detector (DE) detects fire and operates, Lc-L1
If a short circuit occurs between them, the fire signal detection transistor (T11) of the fire signal reception circuit (FR1) turns on. By turning on the fire signal detection transistor (T11),
The output of the inverter gate (IV11) becomes "H", the output of the OR gate (OR11) becomes "H", and a pulse signal is generated through the capacitor (C11). By the output of this pulse signal, the OR gate (OR3
In 1), the transistor (T31) is temporarily turned on to sound the main sound (Z) to notify that a fire signal has been input.

In the storage circuit (AC), the pulse signal from the fire signal receiving circuit (FR1) is supplied to the D-FF (DF) through the OR gate (OR21).
Since the signal is input to the CP of F21), the output of Q becomes "H", the monostable multivibrator (MM) is operated, and the frequency dividing circuit is reset. "H" of Q of D-FF (DFF21)
By the output, the output of Q of D-FF (DFF22) becomes “H”,
Is "L". By the "H" output of Q of D-FF (DFF22) and the pulse signal from f1 of the frequency divider,
The AND gate (A22) outputs an intermittent pulse (high-speed pulse) to the transistor (T22) to perform on-off operation, and blinks the heat storage lamp (LG) of the first storage lamp. D-FF (DFF22)
The output of the AND gate (A2) is determined by the "H" output of Q of ".times."
The output of 3) becomes "H", and the transistor (T23) is turned on, and the recovery relay (R1) is operated. By the operation of the recovery relay (R1), its break contact (r1) opens,
Turn off the fire signal detection transistor (T11).

Further, the output of the AND gate (A24) temporarily becomes “H” due to the output of the fixed period generated after a predetermined time, for example, 2 seconds, after f2 of the frequency divider circuit and the output from f4 described above,
The D-FF (DFF22) is reset via the OR gate (OR24). As a result, the output of Q of the D-FF (DFF22) becomes "L" and the output of "Q" becomes "H". This D-FF (DFF2
Since the output of the AND gate (A22) becomes "L" by the "L" output of Q in 2), the transistor (T22) is turned off,
The heat storage lamp (LG) turns off. Another "H" output and D-
By the "H" output of Q of FF (DFF21), AND gate (A2
Since the output of 1) becomes “H”, the transistor (T21)
Turns on, and turns on the smoke accumulation lamp (LR) of the second accumulation lamp. At the same time, the output of the AND gate (A23) becomes "L" due to the "L" output of Q of the D-FF (DFF22).
23) turns off and the recovery relay (R1) turns off. Break contact (r1) of the recovery relay (R1) when it turns off
Returns and closes. When the contact (r1) is restored, that is, when the break operation (for example, 2 seconds) is performed, the sensor (DE) is restored and returns to the fire monitoring state. Also, the output of the OR gate (OR23) becomes "H" by the "H" output of the AND gate (A21), so that the OR gate (OR12) of the fire signal receiving circuit (FR1)
Is "H".

When the restored detector (DE) fires again,
Since the fire signal detection transistor (T11) turns on again, the output of the inverter gate (IV11) becomes "H",
The output of the OR gate (OR11) becomes "H". The "H" output of the OR gate (OR11) and the OR gate (OR12) allows AN
The output of the D gate (A11) becomes “H”, the output of the inverter gate (IV12) becomes “L”, and the output of the inverter gate (IV1) becomes “H”.
The output of 3) becomes "H", and the output of the OR gate (OR22) becomes "H". The "H" output of the OR gate (OR22) and the AND gate (A11) allows the AND gates (A11), (A
12) and an OR gate (OR11), (OR12), (OR22) and an inverter gate (IV12), (IV13). The self-holding circuit self-holds the fire signal. Then, the district indicator (L1) is output by the "L" output of the inverter gate (IV12).
In addition, fire light (Lf) by "H" output of OR gate (OR22)
Lights up, and this state is continued.

In the storage circuit (AC), the outputs of the OR gates (OR24) and (OR25) become "H" by the "H" output of the OR gate (OR22), and the D-FFs (DFF21) and (DFF22) are reset. (At this time, D-FF (DFF22) has already been reset).
Therefore, the output of Q of D-FF (DFF21) becomes “L”, and A
Since the output of the ND gate (A21) becomes "L", the transistor (T21) is turned off and the smoke accumulation lamp (LR) is turned off.

In the sound ringing circuit (AL), "H" of the OR gate (OR22)
The output of the AND gate (A31) becomes “H” by the output and the “H” output of the D-FF (DFF31), and the OR gate (OR31)
The transistor (T31) is turned on via. Then, the main sound (Z) sounds by this operation. The "H" output of the OR gate (OR22) and the "H" of the D-FF (DFF32)
The output of the AND gate (A32) becomes "H" depending on the output,
Turn on the transistor (T32). The district sound ringing relay (R2) operates by turning on the transistor (T32) to close the make contact (r2) and sound the district sound (B). Further, the output of the inverter gate (IV31) becomes "L" by the "H" output of the OR gate (OR22).

2. If the non-lock type main sound stop switch (Sbm1) is turned on while the main sound (Z) and district sound (B) are sounding, the OR gate (OR22), its stop switch (Sbm1) and the lock type maintenance sound "H" output with stop switch (Sbm2) AND
The output of the gate (A33) becomes “H” and the D-FF (DFF31)
The output of Q is “H” and the output of “L” is “L”. D-
AND gate (A31) by "L" output of FF (DFF31)
Becomes "L", the transistor (T31) is turned off.
, And the sounding of the main sound (Z) stops. D-FF
(DFF31) Q “H” output and maintenance sound stop switch (S
bm2) by the "H" output and 1Hz pulse signal input,
The output of the AND gate (A35) becomes a 1 Hz pulse signal,
The transistor (T33) is operated via the gate (OR33). As a result, the main sound stop warning light (Lbm) blinks.

In this state, when another fire signal receiving circuit (FRn) (not shown) receives the fire signal and generates a pulse signal from the circuit of the capacitor (Cn) and the resistor (Rn) (not shown), the OR of the storage circuit (AC) is performed. The gate (OR21) outputs the pulse signal. The sound signal (A
The L-OR gate (OR32) resets the D-FF (DFF31). When the D-FF (DFF31) is reset, the output of Q becomes “L” and the output of “H” becomes “H”, so that the output of the AND gate (A35) connected to the output of Q becomes “L”. And the transistor (T33) is turned off. The main sound stop warning light (Lbm) connected to the transistor (T33) is turned off by this operation. Also connected to the output of
Since the output of the AND gate (A31) becomes "H", the transistor (T33) is turned on, and the main sound (Z) is sounded again by the subsequent fire signal.

3. When the non-lock type district sound stop switch (Sbl) is turned on while the main sound (Z) and the district sound (B) are sounding, D
The output of Q of -FF (DFF32) becomes "H" and the other output becomes "L". Since the output of the AND gate (A32) becomes "L" by the "L" output of this D-FF (DFF32), the transistor (T32) is turned off and the operation of the district sounding relay (R2) stops. I do. When the relay (R2) is turned off, the make contact (r2) is opened and the sound of the district sound (B) is stopped. At the same time, the AND gate (A37) is connected to the D-FF (DF
The pulse signal is output to the transistor (T34) by the input of the "H" output of Q of F32) and the pulse signal of 1 Hz, and the pulse is output on-o.
ff. As a result, the district sound stop caution light (Lbl) flashes in synchronization.

The "H" output of the AND gate (A31) and the D-FF (DFF3
2) Q “H” output and maintenance sound stop switch (Sbm2)
, The output of the AND gate (A34) becomes "H" and the timer (TM) is activated. Timer (T
For example, when M) times out two minutes after the start of operation, a pulse signal is output and D-FF (DFF32) is reset. The D-FF (DFF3) reset by this pulse signal
In 2), since the output of Q becomes “L” and the output of “H” becomes “H”, the district sound stop caution light (Lbl) is turned off, and the district sound ringing relay (R2) operates to activate the district sound. (B) is re-ringed.

4. If the main sound stop switch (Sbm1) is turned on while the main sound (Z) and district sound (B) are sounding, D
Since the output of Q of -FF (DFF31) becomes "H" and the output of "FF" becomes "L", the main sound (Z) stops sounding and the main sound stop warning light (Lbm) blinks.

When the district sound stop switch (Sb1) is turned on in this state, the output of the Q of the D-FF (DFF32) becomes "H" and the output of "L" becomes "L" as described above in section 3. B) stops sounding and the district sound stop warning light (Lbl) flashes. At this time, since the output of the AND gate (A34) is continuously at "L" by the "L" output from the AND gate (A31), the timer (TM) does not operate.

When another fire signal receiving circuit (not shown) (FRn) receives the fire signal and generates a pulse signal, the storage circuit (AC)
The pulse signal is output from the OR gate (OR21) to the OR gate (OR32) of the sound ringing circuit (AL), and the D-FF (DFF3
1) Reset. As a result, an "L" output is transmitted from the Q of the D-FF (DFF31), and an "H" output is transmitted from the D-FF (DFF31). The main sound stop caution light (Lbm) is turned off by the "L" output from Q, and the output of the AND gate (A31) becomes "H" by the "H" output from the main sound (Z). I do. Also
"H" output from AND gate (A31), "H" output from maintenance sound stop switch (Sbm2) and D-FF (DFF32)
The output of the AND gate (A34) becomes "H" by the "H" output from Q, and the timer (TM) is operated. When the timer (TM) expires after a predetermined time, D-FF
(DFF32) is reset, district sound (B) sounds,
The district sound stop warning light (Lbl) goes out.

In the above-described embodiment, the area sound control unit of the sound ringing circuit (AL) is common to all the lines. However, when the control is performed for each area, the OR gate (OR22) is connected to the AND gate (A22).
32), input from the inverter gate (IV13) of each fire signal receiving circuit (FR) to the corresponding AND gate (A32) (AND
By changing the input to the gate (A32), for example, provided for each district), it is possible to make a district sound corresponding to the district where the fire signal is issued.

When the district sound on the immediately above floor is also sounded, similarly to the above, for example, the corresponding AND gate (A32) from the inverter gate (IV13) of each fire signal receiving circuit (FR) and the corresponding AND gate on the immediately above floor are used. (A32).

[Effects of the Invention] As described above, according to the present invention, the sound sounding circuit is provided with the latch circuit and the timer for resetting the circuit, and the sounding of the area sound is controlled, so that the main sound is stopped. The effect is that only the district sound can be stopped and the sound can be re-ringed.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing one embodiment of the present invention, FIG. 2 is a time chart of the circuit, and FIG.
FIG. 1 is a circuit diagram showing an acoustic sounding circuit of a conventional fire receiver disclosed in Japanese Patent Publication No. 488. In the figure, (DE) is a fire detector, (FR1) is a fire signal receiving circuit, (L1) is a district indicator, (T11) is a fire signal detection transistor, (C11) is a capacitor, and (AC) is a storage circuit. , (Lf) is a fire lamp, (LG) is a heat storage lamp, (LR) is a smoke storage lamp, (DFF21) and (DFF22) are D-type flip-flops, (R1) is a recovery relay, and (r1) is a break contact. , (M
M) is a monostable multivibrator, (21) is a frequency divider,
(AL) is the sound ringing circuit, (Sbm1) is the main sound stop switch, (Sbm2) is the maintenance sound stop switch, (Sbl) is the district sound stop switch, (Z) is the main sound, and (Lbm) is the main sound stop caution. Light, (B) is the district sound, (Lbl) is the district sound stop warning light, (R2) is the district sound ringing relay, (r2) is the make contact, (TM) is the timer, (DFF31), (DFF32) D
Type flip-flop.

Claims (1)

(57) [Claims] 1. A first circuit for energizing and sounding a main sound based on a fire signal, and outputting two signals having different polarities on a regular basis, each time a signal from a district sound stop switch is input. A latch circuit for inverting the polarity of these signals and outputting the same, a second circuit for energizing and sounding the area sound based on one of the signals of the latch circuit and the fire signal, and the first circuit And a timer that operates based on the activation signal of (i) and the inverted signal of the other signal of the latch circuit, and resets the latch circuit after a set time to return to a steady state. Ringing circuit.