JPS5825508Y2 - How to get the job done - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fire alarm system, and more particularly to an automatic fire alarm inspection device used for maintenance and inspection of automatic fire alarm equipment.

FIG. 1 is a schematic configuration diagram of an automatic fire alarm system, in which 1 is a receiver that receives a detection signal from a sensor installed in each room, such as a heat sensor (not shown), and issues an alarm display signal. This receiver 1 is usually installed at a central location, for example, in a control room.

A main bell 3a is connected to the receiver 1 via a power terminal 2at2b and forms a main bell circuit, and is installed in the control room.

Reference numeral 3b is a district bell which is connected to the receiver 1 via the power supply terminals 2c and 2d and forms a district bell circuit, and is installed in each room.

When performing maintenance and inspection on such an automatic fire alarm system, since the main bell 3a and district bell 3b are accompanied by ringing, there is a possibility that people other than the maintenance and inspection personnel may be surprised by the sound or confused as they may mistake it for a real fire. there were.

Therefore, the inspectors work in pairs, with one person testing the operation of the sensor or transmitter, and the other person standing next to the receiver 1 with the main bell 3a and district bell 3b switches (not shown). ), and when the operation tester operates a certain sensor or transmitter, confirms that this is displayed on receiver 1, turns on the main bell 3a and district bell 3b again, and
In order to confirm to the tester that the sensor or transmitter was working, a bell was rung for a short period of time.

Next time the sensor or transmitter's operation is restored, it will not be possible to notify Test Seimei U of the restoration, so
The tester left the scene after confirming the situation based on his senses.

As described above, the bell does not ring continuously while the sensor or transmitter is operating, but the bell is ringed for a short time by operating the bell switch each time after confirmation by a person near the receiver 1. As a result, the operator often forgets to operate the system, resulting in a lack of reliability and troublesome operation.Moreover, there are operational problems in that two inspectors are required.

The present invention has solved the above problems, and its purpose is to provide an automatic fire alarm inspection device that can be inspected by only one inspector, has high performance, and is highly reliable.

Embodiments of the present invention will be described below with reference to FIGS. 2 and 3.

FIG. 2 shows the main circuit of the automatic fire alarm inspection device, and FIG. 3 shows its control circuit. In these figures, 14 is an auxiliary power source, 5 is an auxiliary relay that is energized when a sensor or transmitter is activated, 6 and 7 are the first and second time relays with different set time limits, and 8 to 10 are the first to second time relays.
This is the third relay.

That is, in the main circuit, as shown in FIG. 2, the normally closed contact 8b of the first relay 8 is connected in series to the main bell 3a, and a series circuit consisting of the main bell 3a and the normally closed contact 8b is formed. Auxiliary relay 5 is connected in parallel.

Also, the other normally closed contact 8c of the first relay 8 is connected to the district bell 3b.
are connected in series, and the district bell 3b has a second
An auxiliary power source 4 is connected through a normally open contact 9a of a relay 9.

Furthermore, in the control circuit, as shown in FIG. 3, the normally open contact 5a of the auxiliary relay 5 and the second
A timer circuit is connected in which a parallel circuit consisting of the normally open contact 9b of the relay 9 and a parallel circuit consisting of the first time relay 6 and the second time relay I are connected in series.

This timer circuit consists of a normally open contact 7a of a second time relay and a normally open contact 8a of the first relay 8 via a normally closed contact 6a of the first time relay 6 to the first relay 8. A first relay circuit to which parallel circuits are connected is connected in parallel.

Further, a second relay circuit in which the second relay 9, the normally closed contact 5b of the auxiliary relay 5, and the normally open contact 8d of the first relay 8 are connected in series is connected to this first relay circuit. A third relay circuit is constructed by connecting the third relay 10, the normally open contact 7b of the second time relay I, and the normally open contact 9c of the second relay 9 in series to this second relay circuit.
relay circuits are connected in parallel.

According to the inspection device configured as described above, the operation of the existing sensor or receiver is tested, and if they operate normally, the main bell 3a and the district bell 3b will ring, and if the auxiliary relay 5 is activated. At the same time, its normally open contact 5a
is closed, and its normally closed contact 5b is opened.

The first time relay 6 and the second time relay are energized by closing the contact 5a.

Here, the set time limit of the first time relay 6 is T (seconds),
If the set time limit of the second time relay is T (seconds), both time limits are set so that T > T, and first, T2 (seconds) after the closing of the contact 5a of the auxiliary relay 5. The normally open contacts 7a, 7b of the second time relay are closed.

Closing of contact 7a energizes and operates the first relay 8, which closes its normally open contacts 8a and 8d and at the same time normally closed contacts 8b, 8c connected to the main bell circuit and the district bell circuit. is released.

The first relay 8 is self-held by closing the contact 8a, and the bell circuit is disconnected by opening the normally closed contacts 8b and 8c, so that the bells 3a and 3b stop ringing.

This allows the operation tester to perform a short period of T seconds (for example, T
The ringing of the bell at 20.2 seconds) confirms that the sensor or transmitter has been activated.

After that, when the activated sensor or transmitter is restored,
The auxiliary relay 5 becomes inoperative, its normally open contact 5a turns off, and its normally closed contact 5b turns on.

At this time, due to the self-holding of the first relay 8, the normally open contact 8d
is already closed, so the second relay 9 is energized.

When the second relay 9 is energized, the normally open contacts 9a to 9c are closed.

When the contacts 9a and 9b are closed, the auxiliary power supply 4 causes the district bell 3b to ring, and at the same time, the first and second
time relays 6 and 7 are activated again.

When the second time relay I is energized again, the set time limit T
Later, the normally open contacts 7a and 7b are closed again.

Here, since the normally open contact 9c of the second relay 9 is already closed, the third relay 10 operates, and its normally closed contact 10a opens, cutting off the power to the control circuit, and the second relay 10 operates. Since the normally open contact 9a of the relay 9 is turned off, the ringing of the district bell that was being rung by the auxiliary power source 4 stops.

Therefore, the operation tester can confirm that the sensor or transmitter has recovered by ringing the bell for a short time.

The related operations of the second time relay 6 have been described above. Next, the related operations of the first time relay 6 will be explained.

Now, when performing an operation test on a certain sensor or transmitter, if the first relay 8 forms a self-holding circuit as described above, the contact 8b connected to the main circuit and the district bell circuit. The contact 8c is off.

That is, even if another sensor or transmitter operates due to an unexpected cause immediately after the main bell circuit and the district bell circuit are disconnected, the main bell 3a and the district bell 3b do not ring, and the abnormality is detected. I can't.

Therefore, if the set time limit T of the first time relay 6 is set to be longer than the time from when the sensor or transmitter is activated until it is restored, the normally closed contact 6a of the time relay 6 will turn off after the set time T. becomes.

Therefore, when the contact 6a is turned off, the first relay 8 becomes inoperable, and the contacts 8b and 80 connected to the bell circuit become inoperable.
is turned on, the main bell and district bell circuits are formed, and the bell rings.

In this way, the first time relay 6 and the second time relay are connected to the timer circuit.
By connecting two time relays in parallel, if a fire occurs in another room while testing the operation of a sensor or transmitter in one room, and that sensor or transmitter is activated. It is possible to detect an abnormality by the first time 1-6 circuit.

The present invention is as described above, in which a control circuit is configured by a timer circuit and a relay circuit, the relay contacts of this control circuit are incorporated into a main bell circuit and a district bell circuit, and a sensor is installed in the main bell circuit. Since the inspection device is constructed by incorporating an auxiliary relay that interlocks with the operation of the auxiliary relay and incorporating the contacts of this auxiliary relay into the control circuit, the related operations between the respective circuits are ensured.

Therefore, by ringing the bell for a short time when the detector or transmitter is activated and restored, the operation tester can be quickly notified of the operational status and restoration status, providing a highly reliable inspection device for automatic fire alarms. It is possible to do so, and its practical value is extremely large.

[Brief explanation of drawings]

Figure 1 is a schematic wiring diagram of a general automatic fire alarm, Figures 2 and 3 show embodiments of the present invention, Figure 2 is a wiring diagram of its bell circuit, and Figure 3 is its control. It is a wiring diagram of a circuit. 3a...Main bell, 3b...District bell,
4... Auxiliary power supply, 5... Auxiliary relay,
5a... Normally open contact of auxiliary relay 5, 5b...
... Normally closed contact of auxiliary relay 5, 7... Time relay, 7a, 7b... Normally open contact of second time relay, 8... First Relay, 8a. 8d... Normally open contact of the first relay, 8b, 8c
...Normally closed contact of the first relay, 9...
Second relay 9a=9bt9c...Normally open contact of second relay, 10...Third relay, 10a
...Normally closed contact of the third relay.

Claims (1)

[Scope of utility model registration request] A main bell circuit in which an auxiliary relay that operates in conjunction with the operation of the sensing section is connected to the main bell, and a normally closed contact of a first relay is interposed between the main bell and the auxiliary relay, and a main bell circuit other than the first relay. A district bell circuit having a normally closed contact connected in series to a district bell and an auxiliary power supply connected to the district bell via a normally open contact of a second relay, and a control for controlling the district bell circuit and the main bell circuit. The control circuit includes a timer circuit in which a parallel circuit of a normally open contact of the auxiliary relay and a normally open contact of the second relay is connected in series to a time relay, and a normally open contact of the time relay. A first relay circuit in which a parallel circuit with a normally open contact of the first relay is connected in series with the first relay, and a normally closed contact of the auxiliary relay and the first relay are connected to the second relay. a second relay circuit in which normally open contacts are connected in series; and a third relay circuit in which a normally open contact of the time relay and a normally open contact of the second relay are connected in series to a third relay.
An inspection device for an automatic fire alarm, characterized in that these circuits are connected in parallel with each other and connected to a normally closed contact of the third relay.