JPS6362035B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sound device sounding circuit for operating a sound device such as a fire alarm alarm bell, a buzzer, a fire announcement guidance system, etc., and particularly to a sound device sounding circuit that operates a sound device such as a fire alarm alarm bell, a buzzer, and a fire announcement guidance system, and in particular, a sound device sounding circuit that operates a sound device such as a fire alarm alarm bell, a buzzer, and a fire announcement guidance equipment, and in particular, a sound device sounding circuit that operates a sound device such as a fire alarm alarm bell, a buzzer, and a fire announcement guidance equipment. The present invention relates to a circuit with a sound stopping function that can be used to stop sounds.

Conventional circuits of this kind connect the alarm wire connected to the fire detector to the receiver, and when even one of the fire detectors activates the fire relay,
The contact rings a bell, etc. Then, a contact of a manual bell stop key is connected in series with the bell ringing circuit, and the ringing of the bell is stopped by opening the contact.
Then, in order to avoid unnecessary confusion during the test, etc., perform the test by operating the bell stop key,
In order to avoid a situation where an actual fire occurs and the bell does not ring if the user forgets to release it after the test, the contact point of the bell stop key is short-circuited by the alarm from the sensor. but,
With conventional circuits like this, it is possible to stop the ringing after the bell rings, but it is not possible to stop the bell ringing in advance. Therefore, when testing a sensor, etc., the bell rings once and then stops. This may cause unnecessary confusion. Furthermore, even if a sensor malfunctions, the ringing of the bell immediately starts, which also has the disadvantage of causing unnecessary confusion.

The purpose of the present invention is to solve the above-mentioned conventional drawbacks and
At the time of the test or the first alarm, the sound device is run through a delay circuit, during which time it is possible to stop the ringing of the bell, etc., and when the alarm is issued for the second time or later or from a manual transmitter, the alarm is immediately activated. An object of the present invention is to provide a sound device sounding circuit capable of making a sound device sound.

The sounding circuit of the present invention includes a sound device that sounds in response to an alarm from a fire detector connected to an alarm wire wired in a fire warning area, a manual key that stops the sound of the sound device, and a manual key that stops the sound of the sound device. A sound device sounding circuit equipped with a re-sounding means for re-sounding the sound device by re-sounding when the sound device is stopped, a first latch circuit that latches an alarm signal of a fire detector, and an output of the first latch circuit. a second latch circuit for latching the AND of the output of the first latch circuit and the output of the manual key; and a flip-flop reset by the output of the manual key; a first gate that is opened when the flip-flop is reset and allows the alarm signal from the fire detector to be input to the flip-flop; and a first gate that is opened by the output of the second latch circuit and passes through the output of the flip-flop. the first alarm from the fire detector is delayed by the delay circuit to cause the sound device to sound, and the manual key causes the fire detector to sound again while the sound is stopped. The present invention is characterized in that when the alarm signal is input, the acoustic circuit is immediately made to sound by the output of the second gate.

Next, the present invention will be explained in detail with reference to the drawings.

The figure is a circuit diagram showing one embodiment of the present invention.
That is, an alarm from a fire detector connected to the alarm line is input as an alarm signal R from the alarm line or through a contact point of a district relay (not shown) connected to the end of the alarm line. The alarm signal R is input to the first latch circuit 1 and the first gate 2 directly or through the capacitor C. When the alarm signal R is a pulse signal, the capacitor C is not necessary, but when the alarm signal R is a continuous high level signal, the capacitor C inputs the rising portion. Therefore, it is also possible to input signals from a plurality of alarm lines. However, since the first gate 2 is normally closed as will be described later, it does not output the first alarm signal R. The latch circuit 1 latches the first alarm signal R and thereafter outputs a high level signal. If a fire relay (not shown) is provided in the fire receiver that is activated by an alarm from one of the sensors, and a fire signal is given from the contacts of the fire relay, the first latch circuit 1 is unnecessary. be. However, in this case, the fire relay can be considered to constitute the first latch circuit.

In the flip-flop 3, the output of the gate 2 and a manual key K for stopping the sound are connected to the C terminal, and are inverted every time a pulse is input to the C terminal.
However, when a high level is applied to the set input S, the output terminal Q is forcibly set to a high level. Since the output of the latch circuit 1 is applied to the set input S through the inverter 4, the flip-flop 3 is always in the set state and the output terminal Q is at a high level. Furthermore, since the negative output of the flip-flop 3 is connected to the control input of the first gate 2,
The first gate 2 is normally closed.

The output of the latch circuit 1 and the output Q of the flip-flop 3 are coupled by a first AND circuit 5, and the output of the AND circuit 5 is connected to a delay circuit 6. The output of the delay circuit 6 operates a relay 7 for driving the audio device.

On the other hand, the negative output of the flip-flop 3 and the output of the first latch circuit 1 are coupled by a second AND circuit 8, and the output of the AND circuit 8 is latched by a second latch circuit 9. The output of the second latch circuit 9 opens the second gate 10, and the output Q of the flip-flop 3 opens the second gate 10.
0 to operate the relay 7. relay 7
is activated directly by a fire alarm signal M from a manual transmitter.

Next, the operation of this embodiment will be explained. In normal times, the output of the first latch circuit 1 is at a low level, the output of the inverter 4 is at a high level, and the flip-flop 3 is in a set state. Therefore, the output Q is at a high level, the negative output is at a low level, and the first gate 2 is closed.

Next, the first latch circuit 1 is latched by the first alarm signal R, and the output of the latch circuit 1 becomes high level. The output of the latch circuit 1 and the output Q of the flip-flop 3 are combined in a first AND circuit 5, and the output of the AND circuit 5 passes through a delay circuit 6 to operate a relay 7. Therefore, after a delay time of, for example, about 30 seconds after the first alarm signal R is input, the acoustic device is made to sound. If the above-mentioned alarm is due to, for example, a fire detector test or a malfunction, the manual key K is pressed within the above-mentioned delay time.
By operating the (non-lock) button, you can prevent the sound device from ringing. Next, I will explain the reason.

When the output of the first latch circuit 1 goes high, the output of the inverter 4 goes low, and the forced setting of the flip-flop 3 is released. However, of course, the set state is maintained and the output Q is at a high level. In this state, if you operate manual key K to input a pulse to the C terminal of flip-flop 3, flip-flop 3 will be inverted and output Q.
becomes low level and the negative output becomes high level. Therefore, since the output of the first AND circuit 5 becomes low level, the delay circuit 6 is reset before outputting and does not output an output signal after a certain delay time. That is, the relay 7 is inactive and the audio device does not sound. On the other hand, due to the combination of the high level of the negative output and the output of the first latch circuit 1, the output of the AND circuit 8 becomes high level and is latched by the second latch circuit 9, thereby opening the second gate 10. The second latch circuit 9 is a circuit for latching the AND of the first latch circuit output and the output of the manual key. At this time, the output Q of the flip-flop 3 is at a low level, so the relay 7 does not operate. Furthermore, the first gate 2 is opened by the high level of the negative output to prepare for the input of the next alarm signal.

Next, when the alarm signal R is input again, it is applied to the C terminal of the flip-flop 3 through the first gate 2, and the flip-flop 3 is inverted. Due to the inversion of the flip-flop 3, the output Q becomes high level and operates the relay 7 through the second gate 10. That is, if the alarm is issued again, the acoustic device can be sounded immediately to prompt evacuation actions. Since the manual key K is a non-locking type, a bell etc. cannot be left stopped. Additionally, the sound device can be activated in the same way when an alarm is generated due to an actual fire during the test. When repeating the test, the latch circuits 1 and 9 may be unlatched each time using a switch (not shown).

When the flip-flop 3 is inverted again and is in the set state due to the second alarm, since the first gate 2 is closed by the negative output Q, the input of the subsequent alarm signal R causes the flip-flop 3 to be in the set state. This prevents the flip-flop 3 from inverting and stopping a bell or the like from ringing. This similarly prevents the flip-flop 3 from being inverted due to a re-issue input when a bell or the like is ringing 30 seconds after the first alarm. That is, input of the alarm signal R while the bell is ringing is blocked by the first gate 2.

Further, when the alarm signal M from the manual transmitter is input, the relay 7 is immediately activated to make the audio device ring. Since the information from the manual transmitter definitely indicates the occurrence of a fire, it is impossible to stop the sound by operating the manual key K. Conventionally, in such cases, the bell ringing was inadvertently stopped, delaying evacuation actions, etc., which could lead to a serious accident, but in this embodiment, it is impossible to stop the bell inadvertently.

As described above, in the present invention, since the first alarm signal or the test alarm signal is configured to cause the acoustic device to sound through the first latch circuit and the delay circuit, the sounding of the acoustic device starts. By operating the manual key for stopping the sound beforehand, the sound device can be made not to sound.
This has the effect of preventing unnecessary confusion during testing or malfunction. In addition, the above-mentioned ringing stop is
The flip-flop is inverted by a non-locking manual key, and the AND of the negative output of the flip-flop and the output of the first latch circuit is latched by a second latch circuit to open the second gate. Therefore, by inputting the alarm signal again, the flip-flop is inverted again, and its output can be passed through the second gate to immediately cause the acoustic device to sound. There is no possibility of losing the ringing of the bell or the like in the event of an actual fire outbreak due to forgetting to operate the manual key for stopping the sound. Furthermore, since the alarm signal from the manual transmitter is configured to directly operate the sound device, the bell will not be stopped due to careless operation of the manual key.

[Brief explanation of drawings]

The figure is a circuit diagram showing one embodiment of the present invention. In the figure, 1...first latch circuit, 2...first latch circuit,
gate, 3...flip-flop, 4...inverter, 5...first AND circuit, 6...delay circuit, 7...
Relay, 8... Second AND circuit, 9... Second latch circuit, 10... Second gate, R... Alarm signal, M
...A warning signal from a manual transmitter.

Claims (1)

[Claims] 1. A sound device that sounds in response to an alarm from a fire detector connected to an alarm wire wired in a fire warning area, and a manual key that stops the sound of the sound device;
A sound device sounding circuit comprising a re-sounding means for re-sounding the sound device by a re-sounding when the sound of the sound device is stopped; a delay circuit for delaying the output of the latch circuit; a second latch circuit for latching the AND of the output of the first latch circuit and the output of the manual key; a first gate that is opened when the flip-flop is reset to input an alarm signal from the fire detector to the flip-flop; and a first gate that is opened by the output of the second latch circuit to input the alarm signal from the fire detector to the flip-flop. and a second gate that allows the output of the fire detector to pass through, the first alarm from the fire detector is delayed by the delay circuit to cause the sound device to sound, and the manual key is used to cause the sound device to sound again while the sound is stopped. A sound device sounding circuit characterized in that when an alarm signal from a fire detector is input, the sound circuit is immediately made to sound by the output of the second gate.