JPH0381199B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fire alarm system that can gradually expand the sounding location of a fire alarm as time passes after a fire starts.

Generally, buildings with many floors are equipped with fire detectors and fire alarms on each floor, but if a fire occurs, all the fire alarms from the first floor to the top floor are set off at the same time. The entire building falls into a state of severe confusion, making it impossible to provide safe and prompt evacuation guidance. Conventionally, when a fire breaks out, only the fire alarms on the floor where the fire occurred and the floors directly above it are activated automatically, and as the fire spreads, the fire alarms on other floors are manually operated from the disaster prevention control room via transmission lines. It was designed to transmit operating signals. However, with this method, if the switch operation procedure is incorrect, it may not be possible to provide appropriate evacuation guidance, and if the manager is not present in the disaster prevention management room, a fire may occur without evacuation guidance being provided at all. The problem was that it would lead to expansion.

The present invention has been made in order to eliminate such drawbacks of the conventional example, and is designed so that after a fire occurs, the sounding area of the fire alarm automatically expands sequentially centering on the floor where the fire occurred as time passes. The purpose of this invention is to provide a fire alarm system with

The configuration of the present invention will be explained below with reference to the illustrated embodiment. As shown in FIGS.
Each floor of building 1 with 1F, 2F…, nF 1F~
Fire detectors S ₁ , S ₂ ,…, Sn and fire alarms in nF
B ₁ , B ₂ , ..., Bn and fire detectors S ₁ on all floors
~In the receiver 2 that centrally monitors the sensing operation of Sn,
A driving means 3 that sounds at least a fire alarm on the floor where the fire occurred when a fire occurs in which a detection output is obtained from any of the fire detectors S _{1 to} Sn; Fire alarms were set up mainly on the floor where the fire occurred over time after the Bn sounded.
A sequential driving means 4 for expanding the ringing scale of _B1 to Bn is provided. Figure 1 shows the structure of building 1. Fire detectors S ₁ - Sn and fire alarms B ₁ - Bn are installed on each floor from the 1st floor to the nth floor, and each is connected via a transmission line. It is connected to a receiver 2 installed in a disaster prevention management room or the like. Figure 2 shows receiver 2
For example, when sensor _S1 installed on the first floor is activated, the reception relay in receiver 2 is activated.
R ₁ is activated and fire alarm B ₁ on the 1st floor and the floor directly above it,
In other words, activate the fire alarm _B2 on the second floor,
Drive the rotary relay RR to select the floor where the fire occurred, drive the timer _T1 , and after a certain period of time, the fire alarm on the second floor immediately above the floor where the fire occurred, that is, the third floor.
This is what makes B ₃ sound. Then timer T ₁
The output is input to timer T ₂ , and after a certain period of time after the fire alarm B ₃ on the second floor directly above starts sounding, all floors are
This causes fire alarms B ₁ to Bn on 1F to nF to sound. 5 is a manual simultaneous ringing switch, and when this switch is pressed, fire alarms _B1 to Bn on all floors will ring regardless of the status of timers _T1 and _T2 . . Figure 3 is a time chart showing the above operation. As shown in the figure, when the receiving relay R ₁ operates at time t ₁ , the fire alarms B ₁ and B ₂ on the floor where the fire occurred and the floor immediately above operate, and the After a certain period of time, at time t ₂ , the fire alarm B ₃ on the second floor immediately above operates, and after a certain period of time, at time t ₃ , the fire alarms B ₁ to Bn on all floors operate. . Next, FIG. 4 shows another embodiment of the present invention, in which when the fire detector S ₂ is activated, the fire alarm B ₂ is activated, and after a certain period of time, the fire alarms B on the floor immediately above and the floor immediately below are activated. ₃ and B ₁ are activated, and then after a certain period of time, the fire alarm B ₄ on the second floor directly above is activated, and after a certain period of time, the fire alarms on all floors are activated.
B ₁ to Bn are designed to operate.

Next, FIG. 5 is a circuit diagram of still another embodiment of the present invention, showing a specific example of a circuit for realizing the operation of the fire alarm system of the present invention. In the same figure, S ₁ , S ₂ , ..., Sn are the first floor, the second floor, and
..., a fire detector installed on the nth floor, B ₁ ,
B ₂ , ..., Bn are fire alarms installed on the first floor, second floor, ..., nth floor, respectively. Then R ₁ , R ₂ ,…, Rn
are receiving relays connected to the fire detectors S ₁ , S ₂ , . These receiving relays R ₁ ~ _{R 2}
is a self-holding type that maintains its state unless it is reset once it receives a signal, and has three contacts. In the embodiment of FIG. 5, these contacts are represented as r ₁₁ , r ₁₂ , r ₁₃ for the receiving relay R ₁ , and in the following order as r ₂₁ , r ₂₂ , r ₂₃ , ..., rn ₁ , rn ₂ , rn ₃ It is expressed as RG is a starting relay and a contact
It is connected in series with the parallel circuit of r ₁₁ , r ₂₁ , r ₃₁ , ...rn ₁ . Therefore, when any one of fire detectors S ₁ to Sn operates, starting relay RG is activated.
is energized and contact rg closes. This excites relay RF and closes contacts rf ₁ , rf ₂ , and rf ₃ .
RR ₁ to RRm are rotary relays, with contacts rr ₁₀ , rr ₂₀ ,..., rrm ₀ and rotary contacts, respectively.
It has rr ₁₁ , rr ₁₂ , rr ₁₃ , ..., rrm ₁ , rrm ₂ , rrm ₃ . When current flows through rotary relays RR ₁ to RRm, contacts rr ₁₀ to rrm ₀ open, and rotary contacts rr ₁₁ , rr ₁₂ , rr ₁₃ , ..., rrm ₁ , rrm ₂ ,
rrm ₃ advances one frame. Also RX ₁ ~
RXm is a relay, each with two contacts rx ₁₁ ,
It has rx ₁₂ ,..., rxm ₁ , rxm ₂ . T ₁ to _{T 3} are timed relays, which close two contacts t ₁₁ and t ₁₂ for T ₁ and close one contact t ₂ for T ₂ after a certain period of time after voltage is applied. However, for T ₃ , the two contacts t ₃₁ and t ₃₂ are opened after a certain period of time.

If a fire breaks out on the first floor, the receiving relay R ₁ operates and maintains itself, and the fire alarms B ₁ and B ₂ sound when the contact r ₁₃ is closed. Further, by closing contact _r11 , starting relays RG and RF operate, and contacts _rf1 to _rf3 are closed. At this time contact rf ₁
Rotary relays RR ₁ to RRm operate when the terminal is closed. Among these, the rotary relay RR ₁ is stopped when its rotary contact rr ₁₂ reaches "1", the relay RX ₁ is activated, and the contact rx ₁₁ of this relay is opened. other rotary relays
RR ₂ ,..., RRm advances until its contact reaches "E", and when it reaches "E", relay RX ₂ ,...,
RXm operates and these relay contacts rx ₂₁ ,…,
rxm ₁ opens and stops. In addition, the closing of the other contact rx ₁₂ of the relay RX ₁ activates the time-limited relay T ₁ , and after a certain period of time, the closing of the contact t ₁₂ causes the fire alarm B ₃ on the second floor immediately above, that is, the third floor, to sound. The time-limited relay _T2 is activated by the closing of the contact _T11 . After a certain period of time has elapsed since the voltage was applied to the time relay _T2 , the contact _t2 is closed, and the fire alarms _B1 to Bn on all floors are activated. Furthermore, even when switch SW ₁ is closed, fire alarms B ₁ to Bn on all floors operate simultaneously; conversely, when acoustic stop switch SW ₂ is opened, all fire alarms B ₁ ~Bn are all things that stop working.

Next, switches _S11 and _S12 are interlocked reset switches, one of which is closed and the other is opened. When switch _S11 is opened, reception relay _R1 is reset and activation relays RG and RF are sequentially restored. Furthermore, when the receiving relay R ₁ is restored, the relay RX ₁ is also restored, its contact rx ₁₁ is closed, and the rotary relay RR ₁ advances to "E". By the way, when switch S ₁₁ is opened, switch S ₁₂ which is interlocked with it is closed, so while relay RF is operated for a while by capacitor Cx, time-limited relay T ₃ and relay A are operated, It is self-held by its contact t ₃₁ and contact a. As a result, contact _t32 is closed, and voltage is applied to all rotary relays _RX1 to RXm. However, contact t ₃₁ of timer T ₃ ,
Since _t32 is opened after a certain period of time, when the contact is opened, the rotary relays _RR1 to RRm advance one frame from "E" to "S" and return to the initial state.

Next, FIG. 6 shows still another embodiment of the present invention. In the circuit shown in the figure, when any one of the fire detectors S ₁ to S ₅₀ is activated, one of the corresponding fire alarms B ₁ to _{B 50} is activated. After a certain period of time, the fire alarms on the floor where the fire occurred, the floor immediately above it, the second floor immediately above it, and the floor immediately below it are set to sound. First contact r ₁
~ _r50 is a contact corresponding to the receiving relay _R1 ~ _R50 of each fire detector _S1 ~ _S50 as in the case of the embodiment shown in FIG. 5, and any one of the contacts _r1 ~ _r50 When one terminal is closed, the fire alarms B ₁ to _{B 50} operate, and the relay contacts for activation are activated in the same way as in the embodiment shown in Fig. 5.
rg is closed, relay RF is excited, and rf ₁ to _{rf 3} are closed. This allows rotary relay RR ₁ ~
RR ₅ is driven. Contact RRin is a step switch in rotary relays RR ₁ to RR ₅ , and the fifth
It works similarly to the circuit shown. However, when any of the rotary contacts rr ₁ to rr ₅ of the rotary relays RR ₁ to RR ₅ comes to the position where the contacts r ₁ to _{r 50} of the receiving relays R ₁ to R ₅₀ are closed, that rotary relay The rotary relays step forward because the contacts _rx1 to _rx5 are opened by the excitation of the relays _RX1 to _RX5 , and the other rotary relays step to the "E" position and stop. Also, when any of the contacts RX ₁ to RX ₅ of relays RX ₁ to _{RX 5} is closed, the time relay
T ₁ is activated, and after about 3 minutes, contact t ₁₂ is closed, and the fire is removed from the floor immediately above K, second floor immediately above UK, and immediately below the floor where the fire occurred.
Activate BK's fire alarm. At this time, contact _t11 is also closed, so it is a timed relay.
The energization to T ₂ is started, and after about 3 minutes, the contact t ₂ is closed and all the fire alarms B ₁ to B ₅₀ are sounded. In addition, SW ₁ is a simultaneous operation switch, SW ₂ is a sound stop switch, and S ₁₁ is a reset switch.
All of these switches operate in the same manner as in the embodiment of FIG.

The present invention is configured as described above, and a fire detector and a fire alarm are provided on each floor of a building having many floors, and a receiver is installed in a receiver that centrally monitors the sensing operation of the fire detectors on all floors. , a driving means for sounding at least a fire alarm on the floor where the fire occurred when a fire occurs for which a detection output is obtained from any of the fire detectors; Since the system is equipped with a sequential driving means that expands the number of floors where the fire alarm sounds, in the event of a fire, only the fire alarms on the floor where the fire occurred and the floors closest to the floor where the fire occurred will automatically sound, and then As the fire progresses, the number of fire alarm sounding areas can be automatically expanded in sequence, centering on the floor where the fire occurred. It is possible to prevent the danger of people rushing to the evacuation exit and causing secondary accidents due to inappropriate evacuation guidance even though it is not a large fire, and moreover, efficiently evacuating people from the most dangerous floors first. As a result, there is an advantage that prompt evacuation guidance can be performed. Furthermore, as the number of high-rise buildings has increased significantly in recent years, and indoor sound insulation has increased, conventional warning methods that only alert the floor where the fire occurred and the floors nearby may not receive the alarm and may delay evacuation. By automatically increasing the number of fire alarms that sound as the fire progresses, focusing on the floor where the fire occurred, the fear that the alarm will not be heard can be reduced and accurate evacuation guidance can be expected.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the structure of a building in which the fire alarm system of the present invention is installed, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is an explanatory diagram of the same operation, and FIG.
This figure is a block diagram of another embodiment of the same as above, and FIGS. 5 and 6 are circuit diagrams of still another embodiment of the same. 2 is a receiver, 3 is a timing means, 4 is an alarm sequential control means, S ₁ to Sn are fire detectors, and B ₁ to Bn are fire alarms.

Claims (1)

[Claims] 1 Fire detectors and fire alarms are installed on each floor of a building with many floors, and if any of the fire detectors detects a detection output in a receiver that centrally monitors the sensing operations of the fire detectors on all floors, A drive means for sounding a fire alarm at least on the floor where the fire occurred when a fire occurs, and a drive means that causes the fire alarm to sound at least on the floor where the fire occurred and then expands the sounding floors of the fire alarm centering on the floor where the fire occurred over time after the drive means sounds the fire alarm on the floor where the fire occurred. 1. A fire alarm device comprising a sequential drive means for causing