JPH0334201Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method and apparatus for an automatic fire extinguishing device used in electrical discharge machines and the like.

In general, industrial machinery and the like often use combustible materials; for example, electrical discharge machines use dangerous materials with low flash points, such as kerosene, as machining fluid. For this reason, there was a risk of ignition caused by processing sparks. In addition, food processing machines and the like use edible oil for frying as a material, so there have been cases of ignition from the heating flames.

It is important to detect the occurrence of these fires early and extinguish them in the early stages in order to operate and use this type of machinery.

The object of the present invention is to eliminate the drawbacks of the prior art described above and to enable an automatic fire extinguishing system to operate when the machine is operated, thereby enabling initial fire extinguishment.

In order to achieve the above object, the present invention includes a fire sensor placed near the machine, a battery that starts the fire extinguishing device when activated by the fire sensor, a storage box that stores the battery, and a storage box that stores the battery. The automatic fire extinguishing system is characterized by comprising a switch provided at a position for detecting the presence or absence of the battery, and a sequence circuit that adjusts the operating conditions of the machine based on the output of the switch when the battery is stored.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a system diagram showing an embodiment of the present invention. In the same figure, 1 is a fire sensor using bimetal etc. placed near the machine (not shown);
2 is a gas cylinder, and 3 is a fire extinguishing agent cylinder connected to the gas cylinder. 4 is the starting device and gas cylinder 2
Adjacent to. 5 is a nozzle connected to the extinguishing agent cylinder 3. Reference numeral 9 denotes a storage box that houses the battery 6 connected to the fire sensor 1. A battery 6 is housed in a storage box 9, and a limit switch 7 is attached to a lid 10 of the box. The fire sensor 1, the battery 6, and the starting device 4 are connected in series as shown in FIG. 3, and when the bimetal contact 11 of the fire sensor 1 is closed, the starting device 4 is energized by the battery 6.

The activation device 4 includes a drive source such as a solenoid, and the solenoid pulls out the plug of the pressurized gas cylinder 2 and supplies high pressure gas (CO ₂ ) to the extinguishing agent cylinder 3. The extinguishing agent in the cylinder 3 is injected from the nozzle 5 together with pressurized gas to extinguish the fire. Switch 7 is battery 6
When the actuator is attached to the lid 10 of the storage box 9, the actuator contacts (interferes with) the battery 6, and its contact 7a is closed. Contact point 7a is the third
It is connected in series with the relay coil 12 of the sequence circuit 13 of the machine shown in the figure, and the contacts (not shown) of the relay 12 are connected to the start condition circuit (not shown) of the machine.
Configure. Therefore, when the battery 6 is in the storage box 9, the actuator of the limit switch 7 is pressed and the contact 7a is closed, so the relay 12 is energized and the machine is ready to start. If the actuator of limit switch 7 is not pressed, contact 7
a remains open. That is, relay 12
is not energized, so the machine will not start.

In one embodiment of the present invention, the fire sensor 1
used bimetal, but it is not limited to this; in short, any material that can detect fire may be used. Further, the detection of the presence or absence of the battery 6 in the storage box 9 is not limited to the limit switch 7, and many types of detection devices such as non-contact type and contact type can be used.

As described above, the present invention includes a fire sensor placed near the machine, a battery that starts a fire extinguishing system by the operation of the fire sensor, a storage box that stores the battery, and a storage box that detects whether or not the battery is present. This automatic fire extinguishing system is equipped with a switch installed at the detection position and a sequence circuit that sets the starting conditions for the machine using the output of the switch when the battery is stored, so that workers do not forget to insert the battery. It has the effect of preventing fires, detecting the occurrence of fires, and extinguishing them at an early stage.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a configuration of an embodiment of an automatic fire extinguishing system, FIG. 2 is a sectional view of a battery storage box, and FIG. 3 is a diagram showing a part of a sequence circuit of the present invention. 1...Fire sensor, 2...Gas cylinder, 3...
...Extinguishing agent cylinder, 4...Starting device, 5...Nozzle, 6...Battery, 7...Switch, 9...Storage box, 12...Relay, 13...Sequence circuit.

Claims (1)

[Scope of utility model registration request] A fire sensor placed near the machine, a battery that activates the fire extinguishing device when activated by the fire sensor, a storage box that stores the battery, and a switch installed at a position in the storage box that detects the presence or absence of the battery. and a sequence circuit that adjusts starting conditions for the machine based on the output of the switch when the battery is stored.