JP2789396B2 - Automotive fire extinguisher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control type fire extinguisher which blows out a fire extinguishing agent into an engine room of an automobile. The present invention is suitable for use in a bus with an engine room at the rear.

[0002]

2. Description of the Related Art There is known a fire extinguisher in which an operation switch is provided in a driver's seat and a fire extinguishing agent is injected into an engine room by operating the operation switch.

In the conventional apparatus, the operation switch is an emergency switch and its electric system is independent. Therefore, in order to start the fire extinguisher, it is necessary to stop the engine and then operate the operation switch of the fire extinguisher. Was.

[0004]

In an emergency state where smoke is emitted from the engine room, even if the operation switch of the fire extinguisher is operated, the operator sometimes forgets to operate the stop switch of the engine. In such a case, the fuel is continuously supplied, and the fire suppression is delayed.

[0005] Further, when a person other than the driver operates the operation switch of the fire extinguisher, it does not necessarily operate the engine stop switch.

It is an object of the present invention to provide a device for automatically stopping an engine when an operation switch of a fire extinguisher is operated.

[0007]

The present invention is characterized in that there is provided interlocking circuit means for interlocking the stop of the engine simultaneously when the operation switch is operated. The interlocking circuit means can be constituted by a backflow prevention diode that connects the operation switch and the engine stop circuit. Further, it can be constituted by a relay for connecting the operation switch and the engine stop circuit.

According to the present invention, the operation switch of the fire extinguisher can be provided at a position operable from outside the vehicle in addition to the driver's seat.

[0009]

When the operation switch is set to the ON state, current is supplied to the engine stop motor, and the drive of the engine stop motor automatically stops the supply of fuel from the fuel injection pump to stop the engine. At the same time, the solenoid valve is operated to supply the high-pressure air stored in the air tank to the fire extinguishing cylinder to make it open. This extinguishes the fire by extinguishing the extinguishing agent in the fire extinguishing cylinder from the nozzle.

As described above, since the stop of the engine and the injection of the digestive agent are performed simultaneously when the operation switch is operated, the fire extinguishing operation can be performed promptly and reliably automatically with the engine stopped. Therefore, it is possible to prevent fire spread caused by continuing fuel supply.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 1 is a circuit diagram showing the configuration of a first embodiment of the present invention, and FIG. 2 is a side view showing an example of the arrangement inside the vehicle of the first and second embodiments of the present invention.

In the first embodiment of the present invention, the engine room 21
A solenoid valve 2 for controlling activation of a digestive agent ejected from the nozzle 1; and an operation switch 3 for opening and closing a current applied to a drive coil of the solenoid valve 2. As a feature of the present invention, there is provided interlocking circuit means for interlocking the stop of the engine 4 when the operation switch 3 is operated. This interlocking circuit means includes a backflow prevention diode 6 for connecting the operation switch 3 and the engine stop motor 5 of the engine stop circuit. Further, from outside the vehicle, a solenoid valve 2
An operation switch 7 for opening and closing the vehicle is provided, and an engine stop switch 9 for stopping the engine is arranged between the power supply 8 and the engine stop motor 5.

An air tank 12 for storing high-pressure air from a compressor 11 driven by the engine 4 is connected via an electromagnetic valve 2 to a fire extinguishing cylinder 13 for storing extinguishing agents. Connected.
The engine stop motor 5 is connected to a fuel injection pump 19 via a link 17.

Next, the operation of the first embodiment of the present invention will be described.

When the operation switch 3 is set to the ON state, the current from the power supply 8 is supplied to the engine stop motor 5 via the backflow prevention diode 6. When the link 17 is rotated by driving the engine stop motor 5, the fuel injection from the fuel injection pump 19 is stopped, whereby the engine is stopped.

At the same time, the current from the power supply 8 operates the solenoid valve 2 to supply the high-pressure air in the air tank 12 accumulated by the compressor 11 to the fire extinguishing cylinder 13. The high-pressure air opens the valve in the fire extinguishing cylinder 13 to send the extinguishing agent to the nozzle 1 and inject it into the place where a fire occurs.

Thus, when a fire occurs, the operation switch 3
The engine stops automatically just by operating the engine, and the fire extinguishing agent is injected, so that the operation of the engine stop switch 9 in an emergency situation becomes unnecessary, preventing the spread of fire caused by fuel supply due to forgetting to stop the engine. Fire can be extinguished early.

If a fire occurs when the driver is outside the vehicle, the same operation as described above is performed by operating the operation switch 7 outside the vehicle, so that the fire can be reliably extinguished. When it is desired to stop the engine irrespective of fire extinguishing, operating the engine stop switch 9 causes the current from the power supply 8 to drive the engine stop motor 5,
The fuel supply from the fuel injection pump 19 can be stopped, and the engine can be stopped.

(Second Embodiment) FIG. 3 is a circuit diagram showing a configuration of a second embodiment of the present invention.

In the second embodiment of the present invention, a relay circuit 2 is provided between the operation switch 3 and the engine stop motor 5 of the first embodiment.
When the operation switch 3 is set to the ON state, a current from the power supply 8 flows to the coil 20a of the relay circuit 20, and the contact 20b is closed. Thus, the current from the power supply 8 drives the engine stop motor 5 via the contact 20b of the relay circuit 20. Other operations are performed in exactly the same manner as in the first embodiment.

[0022]

As described above, according to the present invention, by operating the operation switch in the event of a fire, the operation of the engine can be automatically stopped and the extinguishing agent can be injected. This has the effect of preventing fire spread caused by fuel supply due to forgetting to stop and extinguishing the fire early.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing an example of an in-vehicle arrangement according to the first and second embodiments of the present invention.

FIG. 3 is a circuit diagram showing a configuration of a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nozzle 2 Solenoid valve 3 Operation switch 4 Engine 5 Engine stop motor 6 Backflow prevention diode 7 Outside operation switch 8 Power supply 9 Engine stop switch 11 Compressor 12 Air tank 13 Fire extinguishing cylinder 17 Link 19 Fuel injection pump 20 Relay circuit 20a Coil 20b Contact 21 Engine Room

Claims (2)

(57) [Claims] 1. A nozzle that opens into an engine room, an electromagnetic valve that controls activation of a fire extinguishing agent jetted from the nozzle, an operation switch that opens and closes a current applied to a drive coil of the electromagnetic valve, and the operation switch. When operated
In a vehicle fire extinguisher equipped with interlocking circuit means for interlocking an engine stop, the interlocking circuit means operates when the operation switch is operated.
Engine stop mode driven by the drive current from the power supply
When the engine stop motor is driven,
A link to stop fuel injection of the fuel injection pump is provided.
For example, engine stop driving the engine stop motor
Backflow prevention die that blocks backflow of drive current from the switch
Aether with the operation switch and the engine stop motor
A fire extinguisher for an automobile, wherein the fire extinguisher is inserted between the two . 2. A nozzle that opens into an engine room, an electromagnetic valve that controls activation of a fire extinguishing agent jetted from the nozzle, an operation switch that opens and closes a current applied to a driving coil of the electromagnetic valve, and the operation switch. An interlocking circuit for interlocking an engine stop when operated is provided. The interlocking circuit includes an engine stop motor driven by a drive current from a power supply when the operation switch is operated. A link that rotates when the engine stop motor is driven to stop the fuel injection of the fuel injection pump, and a contact is closed when the operation switch is turned on, so that the drive current from the power supply is A fire extinguisher for an automobile, comprising: a relay circuit provided to an engine stop motor.