JPH0523332B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an automatic fire extinguishing device for staple food stoves in outdoor cooking vehicles, which automatically extinguishes the burner when each staple food stove completes 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. 25940/1989) The rice cooker used in this staple food stove did not have an automatic extinguishing function when rice cooking was completed. Conventionally, the burner was manually extinguished after determining the completion of rice cooking based on the burnt odor of the rice. For this reason, when cooking rice while driving, it is necessary to temporarily stop the trailer and extinguish the fire, and when cooking rice using multiple staple food stoves at the same time, a lot of manpower is required, reducing driving efficiency. In addition, there is a high possibility that rice cooking will fail, and it is difficult to obtain rice that is in the same good condition. Furthermore, due to the delay in extinguishing the rice after the rice is cooked, the outer pot is likely to overheat and suffer damage such as burnout and deformation, which shortens its useful life.

Currently, most commercial rice cookers on the market are equipped with automatic fire extinguishing devices. However, these rice cookers use heat sources such as gas or electricity that are extremely easy to control, and have a low calorific value.
It is small at around 3000Kcal/H, and most are direct-acting type for indoor use.It uses liquid fuel like an outdoor cooking truck, and has an energy density of 30000Kcal for a rice cooker of the same size. The above-mentioned direct-acting fire extinguishing system requires a large amount of heat reaching up to /H, is exposed to wind and rain, and is subject to large accelerations due to violent vibrations while driving. It was possible.

For this reason, there was a need for an outdoor cooking truck equipped with an automatic fire extinguishing system, but these problems could not be solved.

(Problems to be Solved by the Invention) The present invention provides a staple food furnace with a device that 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 fire. The object of the present invention is to solve the above problems and provide an automatic fire extinguishing device for a staple stove for an outdoor cooking car, which can automatically cook rice uniformly and well even while the car is running.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides several furnaces for main food in the front part of a trailer platform and several furnaces for secondary food in the rear part of the trailer platform. A cooking device, an engine for driving the cooking device and the compressor, and a compressor serving as a pressure source for air and oil feeding are arranged on one side in contact with the edible oven, and a cooking area is provided between these and the above-mentioned main edible oven. A kerosene tank and a gasoline tank are installed on 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 an air pipe, a kerosene pipe, and a gasoline pipe. The outdoor cooking car is equipped with a temperature-sensitive plate 6 attached to the bottom of the outer pot mounted on the main food oven, and a bimetal 7 that is in close contact with the plate.
The temperature-sensitive change is connected to the actuating rod 8 via the support rod 17, and the contact ring 14, the arm 13 and the switch box 12 are connected to the connecting plate 5.
0, but the arm 13
A fulcrum holder 49 is mounted inside the fulcrum holder 49, on which the operating rod 8 is pivotally supported by a fulcrum B18, and a spring A19
The support rod 17 at the tip of the operating rod 8 is brought into close contact with the bimetal 7 of the temperature-sensitive plate 6 attached to the bottom of the outer hook, and the C portion provided on both side walls of the arm 13 is connected to the switch main body 10. which is pivoted by a fulcrum A15 penetrating both side walls of the protruding part,
The contact ring 14 is configured to tightly contact the bottom of the outer pot 4 by the pressure contact spring 11, the switch main body 10 is screwed onto the furnace main body 1, and the air pipe A27 from the air tank 46 is installed in the switch box 12. The air operated valve 20 having the set button 28 and the stopper 36 connected to the air pipe B32 leading to the air chamber 51 of the fuel feeding valve is housed and fixed at a position where the end of the operating rod 8 is fitted, and the fuel valve 38 The switch box 20 is housed and fixed in the switch main body 10 in a position that does not interfere with its movement, and the fuel pipe A39 from the fuel tank 48, the fuel pipe B40 to the burner 2, and the air pipe B32 from the air-operated valve 20 are connected to each other. It is characterized by the fact that

(Example) To explain the present invention with reference to the drawings, Fig. 1 is a side cross-sectional view showing the state in which this device is installed in a reflux type rice cooker as an embodiment of the present invention, and Fig. 2 is a side sectional view of a temperature-sensitive switch. 3 is a front view of the same, FIG. 4 is an enlarged sectional view of the air starter valve of the temperature-sensitive switch, FIG. 5 is a sectional view of the oil feed valve, and FIG. 6 is the piping of the present invention. System diagram, Figure 7 is a displacement diagram when leaving the outer pot, Figure 8
The figure is an a-a sectional view of fulcrum A15, and FIG. 9 is fulcrum B.
18 is a cross-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 gasoline from the gasoline tank can be switched to for combustion 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. 2 and 3. 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. The switchbox 12 and the switch main body 10 are supported by the pressure spring 11 and the fulcrum A15, so 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 pot. The hot plate 6 is protected from high temperatures, and the distance between the bimetal 7 and the operating mechanism interlocked therewith is always maintained constant.

A bimetal 7 is held at the bottom of the outer pot located on the upper surface of the contact ring 14 by a stop ring 16, and a support rod 1 is attached to the center back 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 located on the center line of the arm 13, and the other end is connected and locked to a spring A19 of the switch box 12. Therefore, spring A1
The support rod 17 is lifted by the shrinkage elasticity of the bimetal 7, and the bimetal 7 is brought into close contact with the temperature-sensitive plate 6.

On the other hand, inside the switch box 12 is the actuating rod 8.
In addition to the other end protruding, an air-operated valve 20;
A reset valve 21 is built-in.

FIG. 4 is an enlarged sectional view of the air-operated valve 20. A cylinder 23 is attached to the valve body 22, and an air chamber 24 is formed in the center of the cylinder 23, and a valve shaft A25 passes through the central axis of the cylinder 23. are doing.
A small hole A26 is provided in the valve shaft A25 as shown by the dotted line, and an air chamber 24 and an air pipe A27 are provided.
The valve shaft A is designed to be able to slide left and right to either communicate or shut off the connection.

The other end of the valve shaft A25 is thickened and protrudes to form the shaft 29 of the set button 28, and the spring B3
The valve body 22 is crimped to the valve body 22 via the thread 0. on the other hand,
A small hole B31 is provided in the upper part of the air chamber 24 and is connected to the air pipe B32 and the reset valve 21.

The other end of the operating rod 8 is held by a spring A19, and its upper surface is in contact with a stopper presser 33, which is attached to the left end of the valve body 22 via a fulcrum C34. The stopper 36 is supported under pressure via a stopper pressing spring 35. The distal end of the stopper 36 is formed into a wedge shape and is engaged with a stop groove 37 provided on the shaft 29 of the reset button 28, so that the valve shaft A25 can be held in the closed position. FIG. 4 shows a state in which the above-mentioned fitting is disengaged and the valve is open.
Reference numeral 38 denotes an oil feed valve, which is fixed to the right end of the switch main body 10, and as shown in FIG. A3
9 and a fuel pipe B40, respectively.

FIG. 5 is a sectional view of this oil supply valve 38, which is partitioned into two upper and lower chambers by a diaphragm 41. When the diaphragm 41 is pushed up by the high pressure air flowing into the lower chamber, the valve in the center Axis B4
2 is raised, and the valve head 43 at its tip closes the passage, stopping the supply of oil from the fuel tank. The reset valve 21 allows the air in the air chamber 24 to escape to the outside air by pressing the reset button 44, and by pressing the set button 28 again, the air operated valve 20 can be set (closed) again.

Figure 6 is a piping system diagram, where 45 is a compressor, 46 is an air tank, 47 is a pressure reducing valve, and 48 is a piping system diagram.
is the fuel tank (kerosene and gasoline), and the high pressure air and fuel routes are as follows.

(1) High pressure air X made by compressor 45
After the pressure is accumulated in the air tank 46, it passes through the pressure reducing valve 47 and is divided into two systems, one for pressurizing the fuel tank 48 and the other passing through the air pipe A27 and entering the air-operated valve 20, and then Air pipe B3
2 to the oil feed valve 38, and these two (air operated valve and oil feed valve) constitute the automatic fire extinguishing mechanism of the present invention.

(2) Fuel Y in the fuel tank 48 reaches the oil supply valve 38 via the fuel pipe A39, and then reaches the fuel pipe B4.
0 and reaches the burner 2 where it is burned.

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

1 Press the reset valve 21 to return the pressure inside the air chamber 24 to normal pressure.

2. 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.

3. When the set button 28 of the air-operated valve 20 is pushed in, the stopper 36 fits into the stop groove 37 and is set. The valve stem A25 moves to the right,
Communication with the air chamber 24 is cut off.

To explain this in more detail, press the set button 28 so that the pore A26 bored at the tip of the valve stem A25 is located outside the air chamber 24.
A stopper 36 is engaged with and supported by a stop groove 37 provided on the shaft 29. Next, press the reset button 41 to reset the pressure chamber 5 inside the oil supply valve 38.
The high-pressure air filling the inside of the diaphragm 41 is discharged and the diaphragm 41 is returned to its normal position. At that time, back pressure prevention hole 5
2, outside air enters and helps the diaphragm 41 to return to its original position. When the diaphragm 41 returns to its original position, the valve shaft 42 and valve head 43 connected thereto are lowered, and the valve seat at the tip of the fuel pipe A39 is opened. As a result, the fuel pipe A39 and the fuel pipe B40 are connected to each other, and the fuel tank is closed. Fuel from 48 is supplied to the burner.

4 Light burner 2 and start cooking rice.

5. 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 temperature sensed by 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 33. In conjunction with this, the stopper 36 rises and is disengaged from the shaft 29, so that the set button 28 is released from the spring B.
It returns to the position shown in Figure 4 due to the repulsive force of 30. The valve shaft A25 in the cylinder 23 moves to the left, and the air chamber 24 and the air pipe B32 are communicated with each other through the pore A26.

6 The high pressure air in the air tank 46 is transferred to the valve shaft A25.
The oil passes through the air chamber 24 and reaches the oil supply valve 38.
The diaphragm 41 is pushed up and the valve head 43 closes the oil outlet. Therefore, the fuel sent from the fuel tank 48 is cut off by the valve head 43, and the burner 2 is immediately extinguished. In this way, the burner can be automatically extinguished. The feature of this fire extinguishing system is that it can sufficiently withstand the instantaneous gravitational acceleration that occurs when driving on rough terrain, and does not malfunction. For this purpose, a fulcrum B1 that pivots the actuating rod 8 is required.
8 is set at the center of gravity of the actuating rod, so that it is not affected by the acceleration of vertical vibration. In addition, other operating mechanisms are driven by high-pressure air, so acceleration, rainwater,
Since it operates under conditions where it is completely isolated from dust and the like, extremely high reliability can be maintained.

It should be noted that a rice cooker equipped with this device may be driven on rough terrain, and thus is subjected to extremely large gravitational acceleration due to unevenness of the road surface. To remove obstacles at this time, fulcrum A15 and fulcrum B1
8 are installed at the center of gravity of the support, but in the case where the contact ring 14, arm 13, and switch box 12 are integrally connected by a mounting plate 50, the actuating rod 8 is installed by a pressure spring 11.
Safety is maintained by spring A19.

(Effects) 1 The structural feature of this device is that the switch box is suspended in the switch main body fixed to the furnace using a pressure spring, and this repulsive force is used to attach the tight ring at the tip of the box to the outer hook. The reason is that it presses against the bottom and brings the temperature-sensitive plate and bimetal into close contact.
For this reason, bimetals can sensitively detect the temperature at the bottom of the pot, and have extremely good sensitivity.
Operation is reliable. In addition, the tight ring completely isolates the bimetal from spills and dust that occur during cooking, so it is completely safe even when cooking rice while driving outdoors, where it is exposed to harsh conditions such as wind, rain, and vibrations while driving. It can exhibit automatic fire extinguishing function.

2 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, unlike 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.

3. 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 a long period of time.

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

5. 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.

6. 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, eliminating the problem of food burning due to overheating after water evaporates, which previously often occurred. 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.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing the device installed in a reflux rice cooker as an embodiment of the present invention, Fig. 2 is a side sectional view of a temperature-sensitive switch, and Fig. 3 is a front view of the same. Figure 4 is an enlarged sectional view of the air starting valve of the temperature-sensitive switch, Figure 5 is a sectional view of the oil supply valve, Figure 6 is a piping system diagram of the present invention, and Figure 7 is the outer pot removed. FIG. 8 is a sectional view taken along the line aa of the fulcrum A15, and FIG. 9 is a sectional view taken along the line bb of the fulcrum B18. 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 ... Air operated valve, 21 ...
Reset valve, 22... Valve body, 23... Cylinder, 24... Air chamber, 25... Valve shaft A, 26...
Pore A, 27...Air pipe A, 28...Set button, 29...Shaft, 30...Spring B, 31...
... Pore B, 32 ... Air pipe B, 33 ... Stopper presser, 34 ... Fulcrum C, 35 ... Stopper presser spring, 36 ... Stopper, 37 ... Stop groove, 38 ... Oil supply valve, 39 ...Fuel pipe A, 4
0...Fuel pipe B, 41...Diaphragm, 42...
... Valve shaft B, 43 ... Valve head, 44 ... Reset button, 45 ... Compressor, 46 ... Air tank, 47 ... Pressure reducing valve, 48 ... Fuel tank, X ...
...High pressure air, Y...Fuel.

Claims (1)

[Claims] 1 Several stoves for staple food are installed in the front of the trailer platform, and several stoves for side dishes are installed in parallel at the rear of the trailer, and a cooker and an engine for driving the cooker and compressor are installed on one side adjacent to the stove for side meals. A compressor serving as a source of pressurized air for air and oil supply is arranged, a cooking area is provided between these and the main cooking stove, and a kerosene tank and a gasoline tank are attached to the lower surface of the rear end of the stove, and the kerosene tank and In an outdoor cooking vehicle in which the gasoline tank is connected to the burner of the main food oven and the burner of the auxiliary food oven via an air pipe, kerosene pipe, or gasoline pipe, the gas tank is attached to the bottom of the outer pot mounted on the main food oven. It is equipped with a temperature-sensitive plate 6 and a bimetal 7 that is in close contact with the plate, and is connected so that the temperature-sensitive change of the bimetal 7 is interlocked with the actuating rod 8 via a support rod 17, and these are connected to a contact ring 14 and an arm 13. Although the switch box 12 is screwed together via the coupling plate 50, a fulcrum holder 49 is attached inside the arm 13, and the operating rod 8 is pivotally supported thereon by a fulcrum B18, and the operating rod 8 is supported by a spring A19. Tip support rod 1
7 is brought into close contact with the bimetal 7 of the temperature-sensitive plate 6 attached to the bottom of the outer pot, and the arm 1
The C part provided on both side walls of the switch main body 10 is pivoted by a fulcrum A15 passing through both side walls of the protruding part of the switch main body 10.
The switch main body 10 is screwed onto the furnace main body 1, and an air pipe A from the air tank 46 is connected to the switch box 12 so that the switch body 10 is in close contact with the bottom of the outer pot 4.
27 and the air pipe B32 leading to the air chamber 51 of the fuel feed valve are housed and fixed in the position where the end of the actuating rod 8 fits, and the air operated valve 20 has a set button 28 and a stopper 36, which are connected to the air pipe B32 leading to the air chamber 51 of the fuel valve. 38 is housed and fixed in the switch main body 10 at a position that does not interfere with the movement of the switch box 20, and a fuel pipe A39 from the fuel tank 48, a fuel pipe B40 to the burner 2, and an air pipe B from the air-operated valve 20 are connected.
An automatic fire extinguishing system for a staple food furnace for an outdoor cooking car, characterized in that 32 are combined respectively.