JPH0523333B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an automatic fire extinguishing device for staple food ovens in outdoor cooking vehicles, which automatically extinguishes the burner when each staple food oven completes rice cooking. It is.

(Prior Art) The applicant previously devised a cooking trailer in which a main food stove, a side food stove, a cooking device, etc. were attached to the trailer so that cooking could be done while the trailer was running. (Japanese Utility Model Publication No. 11455/1972 and Publication No. 25940/1988) The rice cooker used in this staple food stove did not have an automatic extinguishing function when rice cooking was completed.

Therefore, the present inventor invented an automatic fire extinguishing device that is attached to the main food furnace, converts the reversing force of the bimetal into high pressure air pressure, and uses this air pressure to close the fuel valve and extinguish the burner. The application was filed as "Automatic fire extinguishing system for staple food stoves for outdoor cooking vehicles" (Patent Application No. 12038, January 24, 1988).

Although this invention was a highly reliable and innovative automatic fire extinguishing system, it had the drawbacks of a somewhat complicated structure, requiring a large number of parts, and high costs.

(Problems to be Solved by the Invention) The present invention provides a device attached to a staple food furnace that directly operates the fuel valve without converting the reversing force of the bimetal into air pressure to stop the oil supply to the burner and extinguish the fire. The object of the present invention is to provide an automatic fire extinguishing device for a staple food furnace for an outdoor cooking vehicle, which solves the above-mentioned problems.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention arranges several stoves for main food in the front part of a trailer stand and several furnaces for secondary food in parallel in the rear part, and A cooking device, an engine for driving the cooking device and the compressor, and a compressor serving as a source of pressurized air for supplying air and oil are arranged on one side in contact with the stove, and a cooking space is provided between these and the staple food stove. , and a kerosene tank and a gasoline tank are attached to the lower surface of the rear end of the stand, and the kerosene tank and gasoline tank are connected to the burner of the main food furnace and the burner of the auxiliary food furnace through air pipes, kerosene pipes, and gasoline pipes. In the cooking car, there is a temperature-sensitive plate 6 at the bottom of the outer pot of the main food oven, and a bimetal 7 that is in close contact with the temperature-sensitive plate 6.
The bimetal 7 and the head of the support rod 17 are brought into contact so that the temperature-sensitive change of the bimetal 7 is linked to the operating rod 8 via the support rod 17, and these are connected to the contact ring 14, the arm 13, and the switch. A fulcrum holder 39 is attached to the inside of the arm 13 of which the boxes 12 are integrally connected by a connecting plate 37, and the actuating rod 8 is pivotally supported thereon by a fulcrum B18, and the supporting rod 17 at the tip of the actuating rod 8 is supported by a spring A19. The bimetal 7 of the temperature-sensitive plate 6 attached to the bottom of the outer pot
At the same time, the support tubes 38 on both side walls of the arm 13 are fitted and pivotally supported on fulcrums A15 penetrating both side walls of the protrusion of the switch main body 10, and the tight contact ring 14 is attached by a pressure spring 11. The switch main body 10 is screwed onto the furnace main body 1, and the switch box 12 has a fuel valve that opens and closes in conjunction with the rise of the end of the operating rod 8. The fuel valve 20 is provided with a set button 30 having a stop groove 35, a topper 34 that engages with the stop groove 35, a stopper presser 31, a stopper presser spring 33, and a fuel pipe A27 from the fuel tank. The fuel pipe B25 is connected to the burner, and the fuel valve 20 stops supplying oil by reversing the bimetal 7.

(Example) To explain the present invention with reference to the drawings, Fig. 1 is a schematic side cross-sectional view showing a state in which a stove for staple food is attached to a reflux type rice cooker as an embodiment of the present invention, and Fig. 2 is a front view of the same. , FIG. 3 is a side sectional view of the temperature-sensitive switch, FIG. 4 is a front view thereof, FIG. 5 is a partially sectional side view of the fuel valve, and FIG. FIG. 7 is a sectional view taken along line bb.

A reflux rice cooker is a main cooking stove that is mounted on an outdoor cooking car, and is the main rice cooker that allows rice to be cooked while the car is running. Burner 2 is installed. 3 is a lid which is adapted to press and seal the upper edge of an outer pot 4 attached to the furnace main body 1 by means of a fixing clamp. Also, inside the outer pot 4 there are 2 squares.
Inner pots 5 are loaded.

Kerosene from a kerosene tank is mainly used as fuel for the burner 2, but the fuel can be switched to gasoline from a gasoline tank at the time of ignition or other needs.

6 is a convex lens-shaped temperature-sensitive plate attached to the bottom surface of the outer pot, and 7 is a bimetal that is held in close contact with the temperature-sensitive plate 6. This bimetal 7 is the operating rod 8
It is connected to a temperature-sensitive switch 9 attached to the inlet of the furnace main body 1 via.

Next, the structure of this temperature-sensitive switch 9 will be explained in detail with reference to FIGS. 3 and 4. 10 is a switch main body;
It is screwed onto the entrance of the furnace main body, and this main body 10
A switch box 1 is installed inside via a pressure spring 11.
2 is hanging. This switch box 12
The other end extends to form an arm 13, the tip of which forms a tight ring 14. Since the switch box 12 and the switch main body 10 are supported by the pressure spring 11 and the fulcrum A15, the contact ring 14 is pushed up by the repulsive force of the pressure spring 11 and comes into close contact with the bottom of the outer hook. It protects the temperature sensitive plate 6 from high temperatures and maintains a constant distance between the bimetal 7 and the operating mechanism interlocked therewith.

A bimetal 7 is held by a stop ring 16 at the bottom of the outer pot located on the upper surface of the contact ring 14, and a support rod 1 is attached to the center lower surface of the bimetal 7.
One end of the actuating rod 8 is pressed into contact with the actuating rod 8 via the actuating rod 7 . The actuating rod 8 is pivoted at the center of gravity by a fulcrum B18 so as to be held on the center line of the arm 13, and the vicinity of the other end is locked by a spring A19 made of a plate spring. Therefore, spring A1
The support rod 17 is lifted by the elasticity of the member 9, and the bimetal 7 is brought into close contact with the temperature-sensitive plate 6 under pressure.

On the other hand, inside the switch box 12 is the actuating rod 8.
In addition to the other end protruding, a fuel valve 20 is built in.

FIG. 5 is an enlarged sectional view of this fuel valve 20, and shows a valve shaft 2 having a valve body 21 and a valve 22 at one end.
3 passes through the valve shaft 23, and an oil passage hole 24 is provided in the main body directly above the central portion of the valve shaft 23, and is connected to a fuel pipe B25. The valve 22 and the oil passage hole 24 are communicated with each other by a slit 26 around the valve shaft 23, and under normal conditions, the fuel pipe A2 from the fuel tank
7, the burner 2 is supplied with oil through a fuel pipe B25 via a valve 22, a slit 26, and an oil passage hole 24.

On the other hand, the other end of the valve shaft 23 is supported by a spring B28 and a guide 29, and then the set button 30 is pressed.
is attached.

Further, the other end of the actuating rod 8 is connected to a spring A1.
The upper surface of the stopper presser 31 is in contact with the stopper presser 31, which is pivotally supported at one end of the guide 29 via a fulcrum C32, and presses a stopper presser spring 33. The stopper 34 is supported under pressure via the stopper 34. The distal end of the stopper 34 is formed into a wedge shape, and is engaged with a stop groove 35 provided on the shaft of the set button 30 to hold the valve 22 in the open position. FIG. 5 shows a state in which the stopper presser 31 is pushed up by the rise of the other end of the operating rod 8, the stopper 34 and the stop groove 35 are disengaged, the valve 22 is closed, and the fuel supply is cut off. There is.

Incidentally, when setting the outer pot 4 in the furnace main body 1, it is necessary to make sure that the temperature-sensitive plate 6 and the contact ring 14 are brought into close contact with each other. For this reason, a sign is placed on the handle of the outer pot on the side where the temperature-sensitive plate is attached to prevent confusion even at night. For this purpose, 36 is a temperature-sensitive plate indicator attached to the outer pot handle.

(effect) The invention operates according to the following procedure.

(1) When the outer pot 4 containing a predetermined amount of rice and water is placed on the furnace main body 1, the temperature-sensitive plate 6 of the outer pot and the contact ring 14
are pressed against each other, the bimetal 7 is brought into close contact with the temperature-sensitive plate 6 by the repulsive force of the spring A19.

(2) When the set button 30 of the fuel valve 20 is pushed in, the stopper 34 fits into the stop groove 35 and is set. The valve stem 23 moves to the left, the valve 22 opens, and the burner 2 is supplied with fuel.

(3) Light burner 2 and start cooking rice.

(4) As rice cooking approaches the end, the temperature at the bottom of the outer pot begins to rise rapidly. Next, when the temperature of the temperature-sensitive plate 6 reaches the sensing temperature of the bimetal 7 (120 to 170°C), the bimetal 7 reverses and pushes the support rod 17 downward. In conjunction with this, the end of the actuating rod 8 in the switch box 12 is pushed up, pushing up the stopper presser 31. In conjunction with this, the stopper 34 rises and is disengaged from the stop groove 35, so that the set button 30 returns to the position shown in FIG. 5 by the repulsive force of the spring B28. Valve 22 closes and burner 2 is extinguished immediately.

(5) In this way, the burner can be automatically extinguished, but the feature of this fire extinguishing system is that it can withstand instantaneous gravitational acceleration that occurs when driving on rough terrain.
The goal is to prevent malfunctions. For this purpose, the fulcrum A15 and the fulcrum B18 are set at the center of gravity so that they are not affected by the acceleration of vertical vibration. Furthermore, other operating mechanisms operate under conditions where they are completely isolated from acceleration, rainwater, dust, etc., so extremely high reliability can be maintained.

(Effects) 1 The structural feature of this device is that the main functional part is always in a normal operating state regardless of the external conditions caused by running motion, in order to ensure and properly cook rice during outdoor activities. I have to, but
The fulcrum A15 and the fulcrum B18 are located at the center of gravity, respectively, and are supplemented by the pressure contact spring 11 and the spring A19, so that there is no chance of these fittings coming undone.

2. The fuel valve has a simple structure, is trouble-free, and operates reliably and quickly, so it can reduce combustion in the shortest possible time and cook rice properly.

3 The bimetal used in this device is of the snap type, and has a large instantaneous force when inverted, and since the movement is properly transmitted to the support rod 17, there is no malfunction of related equipment.

4 The tight ring 14 completely shields the bimetal 7 from boiling over and dust that occurs during cooking, so it can be used even when cooking rice while driving outdoors, where it is exposed to harsh conditions such as wind and rain and vibrations while driving. , can fully exhibit automatic fire extinguishing function.

5 By attaching this device to a rice cooker for an outdoor cooking car, rice cooking can be completed without any human intervention after ignition, and there is no need to temporarily stop the running vehicle to extinguish the fire, as was the case in the past. , it became possible to cook rice completely while driving. Furthermore, when rice is cooked simultaneously using a plurality of rice cookers, each rice cooker can cook uniformly and well, making it possible to efficiently cook a large amount of rice.

6. Since this device does not use any power supply, there will be no electrical failure even if it is exposed to wind and rain.
Extremely reliable. It is also robust and can withstand continuous use for long periods of time.

7. It is easy to operate, even beginners can master it immediately, and there is no possibility of rice cooking failure due to malfunction.

8. Since the outer pot is no longer burnt out and deformed due to overheating of the burner, the service life of the outer pot can be significantly increased.

9 This device can be used not only for cooking rice, but also for steaming and simmering foods, and the burner automatically turns off when there is no more water in the outer pot, which eliminates the problem of food burning due to overheating after water evaporates, which often occurred in the past. It is possible to prevent this from occurring, and in addition to improving the food economy, it is also possible to significantly improve the work efficiency of workers.

10 The structure is simple and can be provided at low cost.

[Brief explanation of the drawing]

Fig. 1 is a schematic side sectional view showing a staple food furnace attached to a reflux rice cooker as an embodiment of the present invention, Fig. 2 is a front view of the same, and Fig. 3 is a side sectional view of a temperature-sensitive switch. 4 is a front view of the fuel valve, FIG. 5 is a partially sectional side view of the fuel valve, FIG. 6 is a cross-sectional view taken along line aa in FIG. 3, and FIG. 7 is a cross-sectional view taken along line b-b of FIG. 1...Kamado body, 2...Burner, 3...Lid, 4...Outer pot, 5...Inner pot, 6...Temperature plate, 7
... Bimetal, 8 ... Operating rod, 9 ... Temperature-sensitive switch, 10 ... Switch body, 11 ... Pressure spring, 1
2...Switchbox, 13...Arm, 14
... Close contact ring, 15 ... Fulcrum A, 16 ... Stop ring, 17 ... Support rod, 18 ... Fulcrum B, 19 ...
...Spring A, 20...Fuel valve, 21...
Valve body, 22...Valve, 23...Valve stem, 24...Oil hole, 25...Fuel pipe B, 26...Slit, 2
7... Fuel pipe A, 28... Spring B, 29...
... Guide, 30 ... Set button, 31 ... Stopper presser, 32 ... Fulcrum C, 33 ... Stopper presser spring, 34 ... Stopper, 35 ... Stop groove, 36 ... Temperature plate indicator, 37 ... bonding board,
38...support pipe, 39...fulcrum holder.

Claims (1)

[Claims] 1 Several stoves for staple food are placed in parallel at the front of a trailer platform, and several stoves for side meals are placed in parallel at the rear, and a cooking device, an engine for driving the cooking device and compressor, and a transmission engine are placed on one side adjacent to the stove for side cooking. Compressors that serve as pressurized air sources for air and oil are placed, a cooking space is provided between these and the main cooking stove, and a kerosene tank and a gasoline tank are installed on the lower surface of the rear end of the stove, and the kerosene tank and gasoline In an outdoor cooking vehicle in which a tank is connected to a burner of a main food oven and a burner of an auxiliary food oven via an air pipe, a kerosene pipe, and a gasoline pipe, a temperature-sensitive plate 6 is provided at the bottom of the outer pot of the main food oven, A bimetal 7 that is in close contact with this is attached, and the bimetal 7 and the head of the support rod 17 are brought into contact so that the temperature-sensitive change of the bimetal 7 is linked to the actuating rod 8 via the support rod 17, and these are placed in a tight ring. 14. The arm 13 and the switch box 12 are integrally connected by a connecting plate 37, and a fulcrum holder 39 is attached to the inside of the arm 13, and the actuating rod 8 is pivoted thereon by a fulcrum B18, and the actuating rod is supported by a spring A19. The supporting rod 17 at the tip of the arm 13 is placed in close contact with the bimetal 7 of the temperature-sensitive plate 6 attached to the bottom of the outer pot, and the support tube 38 on both side walls of the arm 13 is placed on both side walls of the protrusion of the switch main body 10. The switch main body 10 is screwed onto the furnace main body 1 by fitting and pivotingly supported on a fulcrum A15 passing through the switch body 1, and configuring the contact ring 14 to tightly contact the bottom of the outer pot 4 by means of a pressure contact spring 11. A fuel valve 20 that opens and closes in conjunction with the rise of the end of the actuating rod 8 is built into the switch box 12, and this fuel valve 20 is provided with a stop groove 3.
5, a stopper 34 that engages with the stop groove 35, a stopper presser 31, and a stopper presser spring 33 are provided, and the fuel pipe A27 from the fuel tank and the fuel pipe B25 to the burner are connected. An automatic fire extinguishing device for a staple food oven for an outdoor cooking vehicle, characterized in that the oil supply of the fuel valve 20 is stopped by reversing the fuel valve.