JP2823966B2 - Fire alarm system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire alarm system, and more particularly to a fire alarm system that controls the sounding of a fire alarm in response to operation of a handset.

[0002]

2. Description of the Related Art Conventionally, for example, in a fire alarm system for centrally managing disaster prevention equipment such as hospitals and hotels in one place, a receiver installed in a central monitoring room or the like and a plurality of monitoring areas are provided. The relays and fire detectors installed in the area are connected by a transmission method such as a polling method.

[0003] That is, each of the repeater and the fire detector has a predetermined address number, the receiver transmits each address data at a predetermined cycle, and the repeater and the fire detector specified by the data are transmitted. By returning a response signal of fire information, the receiver side centrally monitors for the occurrence of a fire. When the receiver receives a fire signal from a repeater or a fire detector, a main sound device (hereinafter referred to as a main alarm device) provided in the receiver and a sound device provided in each monitoring area are provided. A fire alarm is issued by sounding a local alarm (hereinafter referred to as a district alarm).

Further, a terminal such as a transmitter and a sub display panel is provided for each monitoring area so that a person who has found a fire can notify the receiver by pressing a push button of the transmitter, for example. It has become. In addition, these terminals and receivers
A telephone jack is provided for inserting the handset, and when the handset is plugged into both telephone jacks, a call can be made between the monitored area and the central monitoring room. Also, in addition to the above-mentioned system, which usually removes the handset from the telephone jack, a handset is permanently installed,
Others allow calls by removing the handset from the telephone hook.

When the main alarm and the local alarm sound in response to the fire, a manager or the like rushes from the central monitoring room to the fire site, connects the handset to, for example, a telephone jack of a transmitter, and transmits the signal to the site. A fire such as notifying the fire department by notifying other managers of the central monitoring room of the fire situation, or instructing the main alarm and the area alarm to stop sounding in the case of a false alarm Confirmation processing can be performed.

[0006]

However, in such a conventional fire alarm system, the sound of the main alarm and the local alarm is extremely loud and resonates inside the building. If you try to talk using a handset between the installed transmitter and the central monitoring room,
For example, there was a problem that a call between the managers was interrupted and a good call could not be made.

[0007] The present invention has been made in view of the above problems, and an object of the present invention is to provide a fire alarm system that can automatically set a good call state while a fire alarm sounds. I do.

[0008]

In order to achieve the above object, the present invention connects to a transmitter or a sub display panel installed in a monitoring area to centrally monitor the presence or absence of a fire, and to respond to the occurrence of a fire. And a receiver that automatically sounds the main alarm and the local alarm installed in the monitored area, and a telephone jack provided on the transmitter or sub display panel and a telephone jack provided on the receiver, respectively. By connecting the handset to the transmitter or the transmitter or the sub display panel and the receiver, by putting the transmitter and the receiver permanently installed in the transmitter or the sub display panel and the handset permanently installed in the receiver in a talking state. It is intended for a fire alarm system that allows a call between two people.

Then, while the receiver automatically makes the main alarm device and the district alarm device sound for fire notification, if the transmitter or the secondary display panel and the receiver are in a communication state, the communication state of the communication state is reduced. period only, stopping either of the ringing of the at least the main alarm or the transmitter or district alarms in the vicinity of the sub-display panel or, although Ru reduces the ringing tone, ringing in maintenance or the like
If a fire occurs while the noise is stopped or reduced, the main alarm
I decided to ring the vessel.

[0010]

According to such a fire alarm system, when a handset is used for a terminal and a receiver such as a transmitter and a sub display panel, the alarm sound of a main alarm and a district alarm is automatically stopped. It decreases an alarm sound, for example, to improve the call status in the surveillance zone and the central monitoring room, during a call for maintenance or the like
If a fire occurs, the main alarm sounds and the fire
You can know.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. First, the configuration of the fire alarm system will be described with reference to FIG. In FIG. 1, 1 is a receiver installed in a central control room or the like, and 2 is a transmitter installed in a monitoring area.
The receiver 1 connects a plurality of sensors 3a to 3n installed in each monitoring area via signal lines. That is, the receiver 1
The control unit 4 constitutes a central unit for determining a fire occurrence and giving a warning instruction, a receiving unit 5 for receiving a fire detection signal from the detectors 3a to 3n, and a monitoring condition for the presence or absence of a fire. Is displayed. When the control unit 4 determines that a fire has occurred, a main alarm 7 for generating an alarm in the central monitoring room, and a call is requested when the handset is connected to the transmitter 2 in the monitoring area described later. And a telephone jack 10 for attaching and detaching a plug 9 of the handset to the receiver 1 side. In addition, L, C
Is a contact for connecting the signal line to the receiver 5 and the sensors 3a to 3n.

A telephone jack 10 is connected to the control unit 4 via signal lines 11 and 12, and furthermore, a plug 9 of the handset is connected.
Is disconnected from the telephone jack 10 and is always connected to one of the signal lines 12, and conversely, when the plug 9 is inserted into the telephone jack 10, a B-contact 1 contact 13 is provided to mechanically cut off the connection with the signal line 12. Have been. Then, the contact 13 is connected to the control unit 4 via the signal line 14, and the control unit 4 determines whether the plug 9 of the handset is connected to the telephone jack 10 or disconnected from the change in the voltage or current level of the signal line 14. Is detected.

Further, the control unit 4, the transmitter 2, and the local alarm 1 are connected via various signal lines connected to the contacts A, T, B, and BC.
7 is connected. A signal line 15 for transmitting a signal associated with the operation of the push button switch 20 in the transmitter 2 is connected to the contact A.
Are connected, a telephone line 16 for making a call between the receiver 1 and the transmitter 2 and a telephone call from the transmitter are provided at the contact T, and a district alarm 17 provided in the monitored area is sounded at the contact B. A control line 18 for supplying electric power for this purpose and a ground line 19 for setting a ground potential are connected to the contact BC.

[0014] The transmitter 2 is used for a fire report.
A push button switch 20 having two contacts of the circuit is provided. One contact 20 a is connected to a signal line extending from the receiving unit 5, and the other contact 20 b is connected to the indicator light 21. When the push button switch 20 is not pressed, both the contacts 20a and 20b are always open, so that the indicator lamp 21 remains off, and at the same time, no fire detection signal is transmitted to the receiver 5. On the other hand, when the push button switch 20 is pressed, both the contacts 20a and 20b become conductive, so that the indicator lamp 21 is turned on. At the same time, the data in the conductive state is transmitted to the receiving unit 5 via the signal line, and this signal is transmitted. The control unit 4 detects the fire report and causes the main alarm 7 and the district alarm 17 to sound.

Further, the transmitter 2 is provided with a telephone jack 22 connected to the signal line 15 and the telephone line 16. When the telephone plug 23 of the detachable handset is inserted into the telephone jack 22, the handset is connected to the telephone line 16. The control unit 4 detects a telephone call based on a call signal from the telephone line 16 and And a telephone call with the handset on the receiver 1 side.

At one end of the telephone jack 22, there is provided a contact 24 having a B contact, which is connected between the control line 18 for supplying power to the district alarm 17 and the ground line 19. The contact 24 is always connected when the plug 23 is not inserted into the telephone jack 22, and when the plug 23 is inserted into the telephone jack 22, one contact 22 a of the jack 22 is linked with one contact 22 a of the jack 22 so that an arrow is turned on. Since it is pushed in the direction of X, it is in an open state and the control line 18 is cut off.

Although FIG. 1 shows one transmitter 2, when a plurality of transmitters are installed, a plurality of similar transmitters are connected to the receiver 1 in parallel. Next, the operation of the fire alarm system having such a configuration will be described. First, when the detectors 3a to 3n do not detect a fire and neither the main alarm 7 nor the district alarm 17 sounds, the plug 23 of the transceiver is inserted into the telephone jack 22 provided in the transmitter 2. When inserted, the control unit 4 of the receiver 1 detects this calling signal, causes the calling buzzer 8 to sound a ringing sound “boo”, and turns on the telephone light of the display unit 6.

Next, upon receiving this call, when the manager inserts the plug 9 of another handset into the telephone jack 10 provided on the receiver 1, the contact 13 is opened, and the control unit 4 changes this open state. By detecting, a communication line between the receiver 1 and the transmitter 2 is formed, and a communication between the respective handsets is enabled. Then, the ringing of the calling buzzer 8 is stopped. When the detectors 3a to 3n detect a fire or when the push button switch 20 of the transmitter 2 is pressed, the receiving unit 5 receives a fire detection signal. A fire is reported by sounding the alarm 17 simultaneously.

In this state, for example, when a manager or the like goes to the site to confirm the occurrence of a fire or to check the fire situation, and plugs the plug 23 of the handset into the telephone jack 22 provided in the transmitter 2, The control unit 4 of the receiver 1 detects this, causes the calling buzzer 8 to sound a ringing sound “boo”, and turns on the telephone light of the display unit 6. Further, when an administrator or the like in a central monitoring room or the like inserts the telephone plug 9 of another handset into the telephone jack 10 of the receiver 1, the control unit 4 detects the open state of the contact 13 and connects with the transmitter 2. The communication with the receiver 1 is enabled, and the ringing of the calling buzzer 8 is stopped.

Here, while the plug 23 is inserted into the telephone jack 22 of the transmitter 2, the contact 24 is automatically opened and the control line 18 is cut off. The sounding of the district alarm 17 stops. Therefore, the sounding of the district alarm 17 is stopped only while the local fire situation is reported to the central monitoring room, so that a good call can be secured. Further, when the plug 9 is inserted into the telephone jack 10 of the receiver 1, the control unit 4 detects the open state of the contact 13 and stops the sounding of the main alarm 7 to secure a better call. .

Next, when a fire occurs during a call, that is, when a fire occurs when the handset is connected to the telephone jacks 10 and 22 of both the receiver 1 and the transmitter 2 and a call is established. In response to the notification data from the sensors 3 a to 3 n or the push button switch 20, the control unit 4
Sound. However, the timer function preset in the control unit 4 automatically stops the sounding of the main alarm 7 when a predetermined time elapses. Therefore, even if the sounding of the district alarm 17 is stopped during a call, the occurrence of a fire can be notified from the receiver side to the other party in the monitored area via the handset.

Further, when the handset is disconnected from the telephone jacks 10 and 22 of the receiver 1 and the transmitter 2 during the stop of the sound, the main alarm 7 and the district alarm are again activated as in the case of the fire. Ring 17 As described above, according to this embodiment, the fire alarm is stopped only while a call is made with the handset, so that a good call state can be ensured. When the call is ended, a fire alarm is performed again. Safety is also ensured.

Although the sounding of the main alarm is stopped in this embodiment, the sounding volume may be lowered. In addition, when a call is made between the receiver and the transmitter, not only does the sound of both the main alarm and the district alarm sound stop or the volume decreases, but also the sound of at least one of the main alarm and the district alarm stops. Alternatively, the volume may be reduced. Next, another embodiment will be described with reference to FIG.

In FIG. 2, the same or corresponding parts as those in FIG. 1 are denoted by the same reference numerals. In this embodiment, the receiver 2
A resistor R having a predetermined resistance value is connected between the contacts of the contacts 24 which are turned on and off in conjunction with the telephone jack 22 provided in the telephone jack 22. Therefore, in the embodiment shown in FIG. 1, the sounding of the district alarm 17 is completely stopped in the call state, whereas in this embodiment, the current is supplied to the district alarm 17 via the resistor R, so The sound does not stop completely even in this state. However, since the supply current is limited by the resistor R, the volume of the district alarm device 17 is reduced, and a good communication state is ensured. Also, since the sounding of the district alarm 17 is performed at a low volume,
A fire can be reported in the monitored area.

Another embodiment will be described with reference to FIG. In FIG. 3, the same or corresponding parts as those in FIG. 1 are denoted by the same reference numerals. In this embodiment, the contact 2 on the transmitter 2 side
Instead of 4, the sound of the district alarm 17 is controlled by a relay 25. That is, when the plug 23 is inserted into the telephone jack 22, a contact 22a of the telephone jack 22 is formed.
And a telephone jack 22 having a contact 22b which is always in a conductive state with the contact 22a when the plug 23 is removed,
A solenoid 25a of a relay 25 is connected between the control line 18 for supplying power and the contact 22b.
A contact 25 for switching between conduction and non-conduction by 5a
b is connected between the power supply terminal of the district alarm 17 and the control line 18. The relay 25 is a solenoid 25
When current does not flow through the contact a, the contact 25b is opened, and when current is supplied to the solenoid 25a from the control line 18, the contact 25b is closed and the district alarm 17 is sounded.

Next, the operation of the fire alarm system will be described. First, when the receiver 1 detects the occurrence of a fire, the main alarm 7 is sounded according to the instruction of the control unit 4, and the control line 1
The contact 25b is closed by supplying a current to the relay 25 via 8, and the district alarm 17 is sounded. In this state, when the handset is plugged into the telephone jack 22 of the transmitter 2, the contacts 22a and 22b are opened, so that no current is supplied to the solenoid 25a.
The contact 25b is opened, and the sounding of the district alarm 17 is stopped. Therefore, when a handset is connected to the transmitter 2,
The sounding of the district alarm 17 is automatically stopped, and a favorable communication state is ensured. When the plug 23 is removed from the telephone jack 22, the contacts 22a and 22b are turned on again, so that current is supplied to the solenoid 25a, the contact 25b is turned on, and the district alarm 17 sounds again.

Another embodiment will be described with reference to FIG.
In FIG. 4, the same or corresponding parts as those in FIG. 3 are denoted by the same reference numerals. In this embodiment, the solenoid 25 of the relay 25 is used.
The contact 25b to be switched by a is a two-contact, one-circuit type, and a resistor 25R is connected between each of the switching contacts 25X and 25Y. When no current is supplied from the control line 18 to the solenoid 25a, the contact 25b of the relay 25 is always connected to the contact 25Y.
When a current is supplied to 5a, it is connected to the contact 25X. Accordingly, when the receiver 1 judges a fire and supplies a current to the solenoid 25a from the control unit 4 via the control line 18, the current is supplied to the district alarm 17 via the contacts 25b and 25X. The container 17 sounds.
When the plug 23 of the transmitter is inserted into the telephone jack 22 of the transmitter 2 in this state, the contacts 22a and 22b are opened, and no current is supplied to the solenoid 25a, and the contacts 25b and 25Y are connected. Since the current supplied to the district alarm 17 is reduced by the resistor 25R, the volume is reduced.

Another embodiment will be described with reference to FIG. In this embodiment, the fire alarm system shown in FIGS. 1 to 4 is further simplified. That is, the relay 25 shown in FIG.
And the ground contact connected to the detectors 3a to 3n and the ground contact BC connected to the district alarm 17 are connected in common, and the ground potential of the transmitter 2 is set by the ground contact C on the sensor side. It has become. Then, one contact 22 b of a telephone jack 22 provided on the transmitter 2 is connected to the ground terminal of the district alarm 17, and the power supply terminal is connected to a power supply line 18 extending from the control unit 4.

According to this configuration, when the receiver 1 senses a fire and supplies a sound to the district alarm device 17 to make it sound, when the plug 23 of the transmitter is inserted into the telephone jack 22, the contacts 22a and 22b are opened. Becomes state, district alarm 1
The earth terminal of 7 floats from the earth contact C,
The sounding of the district alarm 17 is stopped, and a favorable call state is secured.

In the above embodiment, the plug 23 of the handset is inserted into the telephone jack 22 of the transmitter 2 to stop the sound of only the district alarm 17 near the transmitter 2 or to lower the sound volume. However, the sound of the main alarm 7 of the receiver 1 can be stopped or the sound volume can be reduced by inserting the plug. As a result, the ringing of the main alarm 7 on the receiver 1 side prevents the ringing of the ringing buzzer 8 from being difficult to hear.

In the above embodiment, the plug 23 of the handset is inserted into the transmitter 2 to forcibly open the control line 18 and stop the sound. The signal line to the transmitter and the control line to the district alarm 17 are made independent, and the plug 2
When the control unit 4 of the receiver 1 detects a call due to the insertion of 3, the control unit 4 may stop the power supply to the control line 18 and stop the sounding of the district alarm 17.

As described above, according to these embodiments, the fire alarm is stopped or the volume of the alarm is reduced only while talking on the handset, so that a good talking state can be ensured. When the operation is completed, the alarm operation is started again, so that safety is also ensured. In the embodiments shown in FIGS. 1 to 5, the fire alarm system in which a call is made between the receiver and the transmitter is described. However, a call is made between the sub display panel and the receiver instead of the receiver. The present invention can also be applied to a fire alarm system in which both a system and a transmitter and a sub display panel are installed.

Also, a system using a receiver and a transmitter of the type in which a handset plug is attached to and detached from a telephone jack has been described. However, the present invention is not limited to this. May be applied. In such a case, removing the receiver from the telephone hook (off-hook) corresponds to inserting the plug of the handset into the telephone jack, and hanging the handset on the telephone hook (on-hook) is described above. The receiver 1 controls the handset in such a manner that the handset is removed from the telephone jack.

[0034]

As described above, according to the fire alarm system of the present invention, when a handset is used between a terminal such as a transmitter and a sub display panel and a receiver, the alarm sound of the fire alarm is automatically stopped. Or lowering the alarm volume, for example, it is possible to improve the call status between the monitored area and the central monitoring room. Also,
Main alarm when fire occurs during a call during maintenance
Since the device can sound an alarm,
This has the effect that a fire occurrence can be known.

[Brief description of the drawings]

FIG. 1 is a main part circuit diagram showing a configuration of an embodiment of a fire alarm system according to the present invention.

FIG. 2 is a main part circuit diagram showing a configuration of another embodiment.

FIG. 3 is a main part circuit diagram showing a configuration of still another embodiment.

FIG. 4 is a main part circuit diagram showing a configuration of still another embodiment.

FIG. 5 is a main part circuit diagram showing a configuration of still another embodiment.

[Explanation of symbols]

 1; Receiver 2; Transmitters 3a to 3n; Detector 4; Receiver 7; Main alarm 9, 23; Transceiver plug 10, 22; Phone jack 13, 22, 22a, 22b, 24; Contact 17; Container 20; push button switch 25; relay 25a; solenoid 25b; contact R, 25R;

Claims (2)

(57) [Claims] 1. Connected to a transmitter or sub display panel installed in a monitoring area to centrally monitor the presence or absence of a fire, and automatically activates a main alarm and a local alarm installed in the monitoring area in response to a fire. Equipped with a receiver to make a ring, by connecting the handset to each of the telephone jack provided on the transmitter and the telephone jack provided on the sub display panel, or,
A fire alarm system that enables a call between a transmitter or a sub-display and a receiver by putting a transmitter / receiver permanently installed at a transmitter or a sub-display and a transmitter / receiver permanently installed at a receiver into a call state. During the sounding of the main alarm, a handset is connected to the telephone jack of the receiver, or a handset permanently installed in the receiver is put into a talking state, thereby stopping the sounding of the main alarm or the sound volume of the sound. Function limiting means for reducing noise, and a main police during maintenance by the sound function limiting means
A fire has occurred while the alarm sound was stopped or the sound volume was low.
Sounding function restriction canceling means for sounding the main alarm
And a fire alarm system provided in the receiver . 2. Connected to a transmitter or sub display installed in the monitored area to centrally monitor the presence or absence of a fire, and automatically activates the main alarm and the local alarm installed in the monitored area according to the fire. Equipped with a receiver to make a ring, by connecting the handset to each of the telephone jack provided on the transmitter and the telephone jack provided on the sub display panel, or,
A fire alarm system that enables a call between a transmitter or a sub-display and a receiver by putting a transmitter / receiver permanently installed at a transmitter or a sub-display and a transmitter / receiver permanently installed at a receiver into a call state. By connecting a handset to the telephone jack of the transmitter or the sub-display panel or putting the handset permanently installed in the transmitter or sub-display panel into a talk state while the main alarm and the area alarm are sounding. A sound function limiting means for stopping the sound of the main alarm device and the local alarm device in the vicinity of the transmitter or the sub display panel or lowering the sound volume of the sound signal;
When a fire occurs while the alarm sounds or the sound volume is low
Is a sounding function restriction canceling means for sounding the main alarm.
A fire alarm system provided in a receiver .