JPH04348498A - Fire alarming system - Google Patents

Abstract

PURPOSE:To well grasp the call condition by stopping automatically an alarming sound and reducing the volume when a handset is used by a terminal such as an oscillator and a sub-indicator panel and a receiver. CONSTITUTION:When a manager, etc., go to the fire site and insert the plug of a handset to a telephone jack set at a transmitter 22, a control part 4 of a receiver 1 detects this, rings a calling sound to a calling buzzer 8 and lights up the telephone lamp of a displaying part 6. Further, when the manager, etc., at a central monitoring room insert a telephone plug 9 of other handset to a telephone jack 10 at the receiver 1 side, the control part 4 detects the discharging condition of a contact 13, performs the call with the transmitter 2 and the receiver 1 and stops the ringing of the calling buzzer 8. In this case, while a plug 23 is inserted to the telephone jack 22 at the transmitter 2 side, a contact 24 is automatically discharged, a control line becomes the interrupting condition, and therefore, the ringing of a district alarm 17 near the transmitter 2 is stopped (or the volume is reduced).

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 ringing of a fire alarm in response to the operation of a handset.

0002

[Prior Art] Conventionally, for example, in a fire alarm system that comprehensively centrally manages disaster prevention equipment in hospitals, hotels, etc., a receiver installed in a central monitoring room, etc. and a plurality of monitoring areas are used. The repeaters and fire detectors installed in the area are connected using transmission methods such as polling.

That is, each repeater or fire detector has a predetermined address number, and the receiver transmits address data at predetermined intervals to the repeater or fire detector designated by the data. By sending back a response signal with fire information, the receiver centrally monitors whether or not a fire has occurred. When the receiver receives a fire signal from a repeater or fire detector, the main acoustic device installed in the receiver (hereinafter referred to as the main alarm) and the acoustic device installed in each monitored area are activated. (hereinafter referred to as a district alarm) to notify the occurrence of a fire.

[0004] Also, each monitored area is equipped with a terminal device such as a transmitter and a sub-display panel, so that a person who discovers a fire can send a report to the receiver by pressing a push button on the transmitter, for example. It has become. In addition, these terminals and receivers have
A telephone jack is provided into which a handset can be inserted, and telephone calls can be made between the surveillance area and the central surveillance room by plugging the handset into both telephone jacks. In addition to the above method, which normally involves removing the handset from the telephone jack,
Some devices allow you to make calls by removing the handset from the telephone hook.

[0005] When the main alarm and district alarm sound in response to a fire outbreak, a manager or the like rushes to the fire scene from the central monitoring room, connects a handset to the telephone jack of the transmitter, and calls the scene. Informing other managers of the central monitoring room of the fire situation and instructing them to report to the fire department, or in the case of a false alarm, instructing them to stop sounding the main alarm and district alarms, etc. It is now possible to perform the confirmation process.

[0006]

[Problems to be Solved by the Invention] However, in such conventional fire alarm systems, the sound of the main alarm and district alarm is extremely loud and echoes inside the building, making it difficult to reach the monitored area. Even if you try to use a handset to make a call between the installed transmitter, etc. and the central monitoring room,
For example, there was a problem in that managers were blocked from talking to each other, making it impossible to have a good conversation.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a fire alarm system that can automatically set a good call situation while a fire alarm is sounding. do.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the present invention connects to a transmitter or sub-display panel installed in a monitoring area to centrally monitor the presence or absence of a fire, and responds to the occurrence of a fire. equipped with a receiver that automatically sounds the main alarm and the district alarm installed in the monitored area, and a telephone jack installed on the transmitter or sub-display panel and a telephone jack installed on the receiver, respectively. The transmitter or sub-display panel and the receiver can be connected by connecting the handset to the transmitter or sub-display panel, or by putting the transceiver permanently installed on the transmitter or sub-display panel into a conversation state with the handset permanently installed on the receiver. The target is a fire alarm system that enables communication between people.

[0009] When the transmitter or the sub-display panel and the receiver are placed in a communication state while the receiver automatically sounds the main alarm and district alarm to notify the fire, the state of the communication is changed. For a limited time only, the sounding of at least one of the main alarm or the local alarm near the transmitter or sub-display panel will be stopped or the sound volume will be reduced.

0010

[Operation] According to such a fire alarm system, when a handset is used with a terminal device such as a transmitter or sub-display panel and a receiver, the alarm sounds of the main alarm and district alarm are automatically stopped. The alarm volume is lowered to improve communication conditions between, for example, the monitoring area and the central monitoring room.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, the configuration of this fire alarm system will be explained based on FIG. In FIG. 1, 1 is a receiver installed in a central control room, etc., 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, receiver 1
The controller 4 includes a control unit 4 that constitutes a central part for determining the occurrence of a fire and issuing warning instructions, a receiving unit 5 that receives fire detection signals from the sensors 3a to 3n, and a monitoring status such as whether or not a fire has occurred. It is equipped with a display section 6 that displays. Further, when the control unit 4 determines that a fire has occurred, a main alarm 7 is used to generate an alarm in the central monitoring room, and when a handset is connected to a transmitter 2 on the monitoring area side, which will be described later, a call is requested. The receiver 1 is further provided with a telephone jack 10 for connecting and disconnecting a plug 9 of a handset. In addition, L, C
are contacts that connect signal lines to the receiver 5 and the sensors 3a to 3n.

The telephone jack 10 is connected to the control unit 4 via signal lines 11 and 12, and is further connected to the handset plug 9.
When the plug 9 is removed from the telephone jack 10, it is always connected to one signal line 12, and when the plug 9 is inserted into the telephone jack 10, the connection with the signal line 12 is mechanically interrupted. It is being The contact 13 is connected to the control unit 4 via the signal line 14, and the control unit 4 determines whether the handset plug 9 is connected to the telephone jack 10 or disconnected from the change in the voltage or current level of the signal line 14. It is designed to detect whether the

Furthermore, the control section 4, the transmitter 2, and the district alarm 1 are connected via various signal lines connected to the contacts A, T, B, and BC.
7 is connected. Contact point A has a signal line 15 that transmits a signal associated with the operation of the push button switch 20 in the transmitter 2.
is connected, a telephone line 16 is connected to contact T for making a call between receiver 1 and transmitter 2, and a telephone call is made from the transmitter, and contact B is used to sound a district alarm 17 installed in the monitored area. A ground wire 19 for setting a ground potential is connected to a control line 18 for supplying electric power and contact BC.

[0014] The transmitter 2 includes a
A pushbutton switch 20 with two circuit contacts is provided, one contact 20a is connected to a signal line extending from the receiver 5, and the other contact 20b is connected to an indicator light 21. When the pushbutton switch 20 is not pressed, both contacts 20a and 20b are always open, so the indicator light 21 remains off, and at the same time, no fire detection signal is sent to the receiver 5. On the other hand, when the pushbutton switch 20 is pressed, both contacts 20a and 20b become conductive, so the indicator light 21 lights up, and at the same time, data indicating the conduction state is transmitted to the receiving section 5 via the signal line, and this signal The control unit 4 detects a fire report and causes the main alarm 7 and the district alarm 17 to sound.

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

Further, at one end of the telephone jack 22, there is provided a contact 24, which is a B contact and one contact, which is connected between the control line 18 and the ground line 19 for supplying power to the district alarm 17. 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 24 of the contact 24 moves in conjunction with one contact 22a of the jack 22. Since it is pushed in the X direction, it becomes open and has a structure that blocks the control line 18.

Although one system of transmitter 2 is shown in FIG. 1, when a plurality of transmitters are installed, a plurality of systems similar to this are connected in parallel to receiver 1. Next, the operation of the fire alarm system having such a configuration will be explained. First, if the detectors 3a to 3n do not detect a fire and neither the main alarm 7 nor the district alarm 17 is sounding, connect the plug 23 of the transceiver to the telephone jack 22 provided on the transmitter 2. When the receiver 1 is inserted, the control section 4 of the receiver 1 detects this ringing signal, causes the ringing buzzer 8 to emit a ringing tone "boo", and lights up the telephone light on the display section 6.

Next, in response to this call, when the administrator or the like inserts the plug 9 of another handset into the telephone jack 10 provided on the receiver 1, the contact 13 opens, and the control unit 4 controls this open state. Upon detection, a communication line is formed between the receiver 1 and the transmitter 2, allowing communication between the respective handsets. Then, the ringing of the calling buzzer 8 is stopped. When the detectors 3a to 3n detect a fire or the pushbutton switch 20 of the transmitter 2 is pressed, the receiver 5 receives a fire detection signal, and upon reception, the controller 4 switches between the main alarm 7 and the area. The occurrence of a fire is notified by simultaneously sounding the alarm 17.

In this state, for example, when a manager or the like goes to the site to confirm the occurrence of a fire or investigate the fire situation, and inserts the plug 23 of the handset into the telephone jack 22 provided on the transmitter 2, The control section 4 of the receiver 1 detects this, causes the calling buzzer 8 to emit a ring tone "boo", and lights up the telephone light on the display section 6. Furthermore, when a manager or the like in a central monitoring room etc. inserts the telephone plug 9 of another handset into the telephone jack 10 on the side of the receiver 1, the control unit 4 detects the open state of the contact 13 and connects the transmitter 2. A telephone conversation with a receiver 1 is made possible, and the ringing of a calling buzzer 8 is stopped.

Here, while the plug 23 is inserted into the telephone jack 22 on the transmitter 2 side, the contact 24 is automatically opened and the control line 18 is cut off. The ringing of the district alarm 17 stops. Therefore, the sounding of the district alarm 17 is stopped only while the local fire situation and the like are reported to the central monitoring room, so that good communication can be ensured. 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 main alarm 7 from sounding, thereby ensuring an even better conversation. .

Next, if a fire occurs during a call, that is, if a fire occurs while the handset is connected to the telephone jacks 10 and 22 of both the receiver 1 and the transmitter 2, and a call is in progress. , the control unit 4 activates the main alarm 7 in response to notification data from the sensors 3a to 3n or the pushbutton switch 20.
sound. However, a timer function preset in the control unit 4 automatically stops the main alarm 7 from ringing after a predetermined period of time has elapsed. Therefore, even if the district alarm 17 stops ringing during a call, the receiver can notify the other party within the monitored area of the occurrence of a fire via the handset.

[0022] Furthermore, if the handset is removed from the telephone jacks 10, 22 of the receiver 1 and transmitter 2 while the ringing is stopped, the main alarm 7 and district alarm Ring 17. As described above, according to this embodiment, since the fire alarm is stopped only while a call is being made using the handset, it is possible to ensure a good call situation, and when the call is ended, the fire alarm is issued again. Safety is also ensured.

In this embodiment, the ringing of the main alarm is stopped, but the volume of the ringing may be reduced. Furthermore, when a communication is established between the receiver and the transmitter, not only will the sounding of both the main alarm and the district alarm be stopped or the volume will be reduced, but also the sounding of at least one of the main alarm and the district alarm will be stopped. 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 in FIG. 1 are designated by the same reference numerals. In this embodiment, receiver 2
A resistor R having a predetermined resistance value is connected between each of the contacts 24 that turn 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 ringing of the district alarm 17 completely stops during the call state, whereas in this embodiment, current is supplied to the district alarm 17 via the resistor R, Even in this condition, the ringing does not stop completely. However, since the supply current is limited by this resistor R, the volume of the district alarm 17 is reduced, and a good communication condition is ensured. Also, the district alarm 17 is ringing, albeit at a low volume.
A fire can be reported within the monitored area.

Still another embodiment will be explained based on FIG. 3. In FIG. 3, the same or corresponding parts as in FIG. 1 are indicated by the same reference numerals. In this embodiment, the contact 24 on the transmitter 2 side
Instead, the ringing of the district alarm 17 is controlled by a relay 25. That is, the telephone jack 22 is provided with a contact 22b that separates from the contact 22a of the telephone jack 22 when the plug 23 is inserted into the telephone jack 22, and always becomes conductive with the contact 22a when the plug 23 is removed, and has a control line for supplying power. 18 and this contact 22b, a solenoid 25a of the relay 25 is connected, and the solenoid 25
Contact 25b that is switched between conduction and non-conduction by a
is connected between the power supply terminal of the district alarm 17 and the control line 18. Note that this relay 25 is a solenoid 25a.
When no current flows, the contact 25b is open, and when current is supplied to the solenoid 25a from the control line 18, the contact 25b is closed, causing the district alarm 17 to sound.

Next, the operation of this fire alarm system will be explained. First, when the receiver 1 detects the occurrence of a fire, it sounds the main alarm 7 according to the instructions from the control section 4, and then the control line 1
By supplying current to the relay 25 via the terminal 8, the contact 25b is closed and the district alarm 17 is sounded. In this state, when the plug of the handset is inserted into the telephone jack 22 on the transmitter 2 side, the contacts 22a and 22b become open, so no current is supplied to the solenoid 25a, and as a result,
The contact 25b becomes open and the district alarm 17 stops sounding. Therefore, if you connect the handset to the transmitter 2 side,
The ringing of the district alarm 17 is automatically stopped, and a good communication condition is ensured. Furthermore, when the plug 23 is removed from the telephone jack 22, the contacts 22a and 22b become conductive again, so that current is supplied to the solenoid 25a, and the contact 25b becomes conductive, causing the district alarm 17 to sound again.

Still another embodiment will be explained with reference to FIG. In FIG. 4, the same or corresponding parts as in FIG. 3 are indicated by the same reference numerals. In this embodiment, the solenoid 25 of the relay 25
The contact 25b, which is switched by a, is of a two-contact, one-circuit type, and a resistor 25R is connected between each switching contact 25X and 25Y. In this relay 25, when no current is supplied from the control line 18 to the solenoid 25a, the contact 25b is always connected to the contact 25Y, and the solenoid 2
When current is supplied to 5a, it is connected to contact 25X. Therefore, when the receiver 1 determines that there is a fire and supplies current from the control unit 4 to the solenoid 25a via the control line 18, the current is supplied to the district alarm 17 via the contacts 25b and 25X, so the district alarm is activated. The device 17 beeps. 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 become open, and no current is supplied to the solenoid 25a, so the contacts 25b and 25Y become connected. Since the current supplied to the district alarm 17 is reduced by the resistor 25R, the volume is reduced.

Still another embodiment will be explained with reference to FIG. This embodiment is a simpler configuration of the fire alarm system shown in FIGS. 1 to 4. That is, relay 25 in FIG.
is omitted, and the ground contact connected to the sensors 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 looks like this. One contact 22b of the 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 the power supply line 18 extending from the control section 4.

According to this configuration, when the receiver 1 detects a fire and supplies it to the district alarm 17 to sound it, when the plug 23 of the transmitter is inserted into the telephone jack 22, the contacts 22a and 22b are opened. situation, district alarm 1
The ground terminal of 7 is floating from the ground contact C,
The ringing of the district alarm 17 will stop, and a good communication condition will be ensured.

In the above embodiment, by inserting the plug 23 of the handset into the telephone jack 22 of the transmitter 2, the ringing of only the district alarm 17 near the transmitter 2 is stopped or the ringing volume is reduced. However, by inserting this plug, the ringing of the main alarm 7 of the receiver 1 can be stopped or the ringing volume can be reduced. As a result, the ringing of the call buzzer 8 will not be difficult to hear due to the ringing of the main alarm 7 on the receiver 1 side.

Further, in the above embodiment, by inserting the plug 23 of the handset in the transmitter 2, the control line 18 is forcibly opened and the ringing is stopped. The signal line to the transmitter and the control line to the district alarm 17 are separated, and the plug 23 to the jack 22 of the transmitter 2 is connected.
When the control section 4 of the receiver 1 detects a call due to the insertion of the 18, the control section 4 may stop supplying power to the control line 18 and stop the district alarm 17 from ringing.

As explained above, according to these embodiments, the fire alarm is stopped or the volume of the alarm is lowered only while a call is being made using the handset, so it is possible to ensure a good call condition, and it is possible to maintain a good call condition. When the alarm is finished, the alarm operation starts again, ensuring safety. Incidentally, in the embodiment shown in FIGS. 1 to 5, a fire alarm system was explained in which a call is made between a receiver and a transmitter, but instead of a receiver, a call is made between a sub-display panel and a receiver. It can also be applied to a fire alarm system that installs both a transmitter and a sub-display panel.

[0033] In addition, although a system using a receiver and a transmitter in which the plug of the handset is connected to and removed from a telephone jack has been described, the system is not limited to this, and the system 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 handset plug into the telephone jack as explained above, and hanging the handset on the telephone hook (on-hook) corresponds to the above explanation. The receiver 1 side controls the handset so as to correspond to removing the handset from the telephone jack.

[0034]

[Effects of the Invention] According to the fire alarm system of the present invention, when a handset is used with a terminal such as a transmitter or a sub-display panel and a receiver, the alarm sound of the fire alarm is automatically stopped. Since the alarm volume is lowered, it is possible to improve communication conditions between the monitoring area and the central monitoring room, for example.

[Brief explanation of drawings]

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

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

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

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

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

[Explanation of symbols]

1; Receiver 2; Transmitter 3a-3n; sensor 4; Receiving section 7; Main alarm 9, 23; Transmitter/receiver plug 10,22; telephone jack 13, 22a, 22b, 24; Contact 17; District alarm 20; push button switch 25; relay 25a; Solenoid 25b; contact R, 25R; resistance

Claims (3)

[Claims] [Claim 1] Connected to a transmitter or sub-display panel installed in the monitored area to centrally monitor the presence or absence of a fire, and automatically activate the main alarm and district alarm installed in the monitored area in response to the occurrence of a fire. By connecting the handset to the telephone jack provided on the transmitter or the sub-display panel and the telephone jack provided on the receiver, or In a fire alarm system that enables communication between a transmitter or a sub-display panel and a receiver by putting a handset permanently installed in the area and a handset permanently installed in the receiver into a communication state, While ringing, connect a handset to the phone jack on the transmitter or sub-display panel, or put the handset permanently installed on the transmitter or sub-display panel into a talking state to make calls near the transmitter or sub-display panel. A fire alarm system characterized by having a means for stopping the ringing of a district alarm or reducing the sound volume. [Claim 2] Connected to a transmitter or sub-display panel installed in the monitored area to centrally monitor the presence or absence of a fire, and automatically activate the main alarm and district alarm installed in the monitored area in response to the occurrence of a fire. By connecting the handset to the telephone jack provided on the transmitter or the sub-display panel and the telephone jack provided on the receiver, or In a fire alarm system that enables communication between a transmitter or a sub-display panel and a receiver by putting a handset permanently installed in the main alarm and a handset permanently installed in the receiver into a communication state, A means is provided for stopping the main alarm from ringing or reducing the volume of the ringing by connecting a handset to the telephone jack of the receiver or putting a handset permanently installed in the receiver into a talking state while the main alarm is ringing. A fire alarm system characterized by: [Claim 3] Connected to a transmitter or sub-display panel installed in the monitored area to centrally monitor the presence or absence of a fire, and automatically activate the main alarm and district alarm installed in the monitored area in response to the occurrence of a fire. By connecting the handset to the telephone jack provided on the transmitter or the sub-display panel and the telephone jack provided on the receiver, or In a fire alarm system that enables communication between a transmitter or a sub-display panel and a receiver by putting a handset permanently installed in the main alarm and a receiver permanently installed in a communication state, While the district alarm is sounding, the main alarm and the corresponding A fire alarm system characterized by being provided with means for stopping or reducing the sound volume of a district alarm near a transmitter or sub-display panel.