JPH0751679Y2 - Sound alarm circuit of fire alarm device - Google Patents

Description

Detailed Description of the Invention <Technical Field> The present invention relates to an acoustic ringing circuit of a fire alarm device.

<Prior Art> In a fire alarm device, a bell or an electronic buzzer as a main sound is installed in a receiver, and a bell or an electronic buzzer as a district sound is installed on each floor of a building, for example, to activate a fire detector when a fire occurs Then, the main sound of the receiver was sounded to notify the manager of the fire.

In addition, to prevent confusion due to malfunction of the fire detector, if a fire prevention manager or administrator who can take appropriate measures can be stationed near the receiver, enable only the main sound and ring the district sound. As a stopped state, the ringing was sometimes performed based on the manager's situational judgment.

In addition, the main sound was stopped during maintenance and it was sometimes forgotten to restore it to the normal state after the test was completed.Therefore, a re-ringing circuit was installed, and when the fire signal was input to the receiver, the main sound was restored. There were some that were set to ring.

<Problems of the prior art> However, even in the fire alarm device equipped with the re-ringing circuit as described above, there is not always a person near the receiver who can take appropriate measures, and the switch for stopping the district sound is stopped. The resident could not be evacuated due to the fact that he / she fell to the side, resulting in a fatal accident.

<Means for solving the problem> In consideration of the above drawbacks, this device has the following problems: if there is no manager near the receiver and the district sound is stopped, if a fire signal is input to the receiver. The purpose is to obtain a sound ring circuit of a fire alarm system that enables residents to evacuate safely after a predetermined time, and the main sound stop switch is operated to the stop side. In the sound ring circuit of the fire alarm device equipped with a re-ring circuit that generates an output that sounds the main sound each time a new fire signal is input, even if the sound ringing is stopped, the output of the re-ring circuit is , The input of the first switching circuit for directly controlling the ringing of the main sound and the input of the second switching circuit for controlling the ringing of the district sound connected in parallel with the district sound stop switch via the timer circuit Connected, the local sound, the acoustic ringing circuit of the fire alarm device, characterized in that further connected to the power supply via the output of the third switching circuit for fire alarm which is operated by the fire detector.

<Action> When the re-ring circuit is not operating and the switch for stopping the district sound is turned to the stop side, if a fire occurs and a fire signal is input to the receiver and the re-ring circuit operates, the main The switching circuit that controls the sound is turned on and the main sound is emitted. In addition, the timer circuit is activated, and after one minute, for example, an output is generated, a switching circuit for controlling the district sound operates, and the district sound is sounded through the switching circuit operated by the fire signal.

<Embodiment> FIG. 1 is a circuit diagram showing an embodiment of an acoustic ringing circuit of a fire alarm device according to the present invention. Re is a receiver, which is provided at a place where a fire prevention manager or a manager is resident. D ₁ and D ₂ are fire detectors connected in parallel in each alert area, and are the regional relays N ₁ and N, respectively.
Connected to power supply E via N ₂ . n ₁₁ and n ₂₁ are relays N ₁ and
Make contact for self-holding of N ₂ , each diode d
And a resistor R ₁ and a common recovery switch Sr for connection to the power source E. F is a fire alarm relay, a district relay
It is connected to the make contacts n ₁₂ , n _{22 of} N ₁ , N ₂ . A is a re-ringing circuit, which is a make contact n ₁₃ , n for the regional relays N ₁ , N ₂ , respectively.
_23, stopping a series circuit, an OR circuit G which enters the connection point of the capacitor C and a resistor R ₂ is connected, the bell resistor R ₃ as a main sound with the series consisting of a capacitor C and a resistor R ₂ Main sound stop switch Sbm, set input to OR circuit G, reset input main sound stop switch Sbm and resistor R
It is composed of an RS flip-flop circuit FF connected to the connection point of ₃ . T is a timer circuit connected to the output of the re-ringing circuit A, and is configured to generate an output after a predetermined time, for example, 30 seconds, 1 minute or 2 minutes. Z is the receiver Re
A first switching circuit S ₁ that directly controls the ringing by a bell as a main sound provided in or near the bell
, And its input is connected to the output of the re-ringing circuit A. B is a bell as a district sound, and a make contact f of a fire alarm relay F as an output of a third switching circuit operated by a fire detector and a district sound stop switch Sb.
It is connected to the power supply E via a _second switching circuit S ₂ which controls the ringing of the district sound B having l in parallel. The input of the switching circuit S ₂ is connected to the output of the timer circuit T.

Next, the operation of the above circuit will be described. Fire detector due to fire
When D ₁ is activated, the regional relay N ₁ is activated and the make contact n ₁₁
Is closed and its operation is self-maintained, and the relay F is operated by closing the make contact n ₁₂ . When the make contact n ₁₃ of the re-ringing circuit A is closed and the charging current flows through the capacitor C, the input of the OR circuit G becomes high level and RS
The flip-flop circuit FF is set and its output becomes high level. As a result, the first switching circuit S ₁ operates, the main sound Z sounds, and the manager or fire prevention officer is informed that a fire has occurred. Further, the contact point f is closed and the district sound B is sounded to notify the residents on each floor that a fire has occurred.

Although the above operation is general, when the main sound Z is sounded, the manager may temporarily stop sounding to confirm that a fire has occurred. In this case, the main sound stop switch Sbm and the district sound stop switch Sbl are tilted to the stop side. As a result, the RS flip-flop circuit FF is reset and its output becomes low level to stop ringing of the main sound Z and ringing of the district sound B.

When the fire spreads while the manager confirms the fire, and the fire detector D ₂ operates and the district relay N ₂ operates, the make contact n ₂₃ is closed and the charging current flows to the capacitor C and the flip-flop circuit. FF is set and its output goes high. Then, the first switching circuit S ₁ operates, the main sound is emitted, and it is notified again that the fire signal is input to the receiver Re. At that time, even if the manager is not near the receiver, an output is generated from the timer circuit T after a predetermined time, for example, 30 seconds, the second switching circuit S ₂ is activated, the district sound B is sounded, and a fire occurs. Residents will be notified of the occurrence.

In the above embodiment, the switching circuit whose conduction is controlled by the fire signal is the make contact f of the relay F, but the district sound B may be controlled by another general switching circuit.

<Effect> Since the sound ring circuit of the fire alarm system of the present invention is configured and operates as described above, even if the district sound stop switch is tilted to the stop side, it is near the receiver, that is, in the range where the main sound can be heard. Even if there is no manager, the bell ringing circuit of the fire alarm system can be obtained, which can sound the district sound when a fire signal is input to the fire receiver and inform the residents that a fire has occurred and can evacuate safely. effective.

[Brief description of drawings]

The drawing is a circuit diagram of an embodiment of an acoustic ringing circuit of the fire alarm device of the present invention. E ... Power supply, Re ... Receiver, D ₁ , D ₂ ... Fire detector, N ₁ , N ₂ ...
District _{relays, n 11 ~n 13, n 21} ~n 23 ... relay N _1, N ₂ of the make contact, F ... third fire alarm for relay as a switching circuit, f ... relay F of make contact, A ... re ringing circuit, G ... OR circuit, FF ... RS flip-flop circuit, T ... timer circuit, Z ... main sound, B ... local sound, the first switching circuit for controlling the ringing of the S ₁ ... main sound, S ₂ ... area Second switching circuit for controlling ringing of bell, R _{1 to} R ₃ ... Resistor, C ... Capacitor, d ... Diode, Sbm ... Main sound stop switch, Sbl ... District sound stop switch, Sr ... Restoration switch.

Continuation of the front page (56) References JP-A-58-205295 (JP, A) JP-A-58-165190 (JP, A) JP-A-59-163692 (JP, A) Japanese Patent Application No. 53-2486 ( Micro film (JP, U) of the detailed description and drawings attached to the application of Japanese Utility Model Publication No. 54-108681

Claims (1)

[Scope of utility model registration request] 1. A re-ringing circuit for generating an output for ringing the main sound each time a fire signal is newly input even if the ringing of the main sound is stopped by operating the main sound stop switch to the stop side. In the sound ringing circuit of the provided fire alarm device, the output of the re-ringing circuit is connected in parallel with the input of the first switching circuit for directly controlling the ringing of the main sound and the district sound stop switch via the timer circuit. The district sound is connected to the input of the second switching circuit for controlling the ringing of the district sound, and the district sound is further connected to the power source through the output of the third switching circuit for the fire alarm operated by the fire detector. A sound ring circuit for a fire alarm device, which is characterized in that