JPH062837A - Safety device for fire extinguishing in heating device - Google Patents

Abstract

PURPOSE:To constitute a safety mechanism, which prevents the discharging of gas when flame is extinguished in a heating device for burning gas from a fuel tank by a burner, simply and easily. CONSTITUTION:The title safety device is constituted of a hook 32, engaged with an operating lever 18, effecting the igniting operation of a burner while moving in accordance with the deformation of a bimetal member 31 sensible for the combustion of the burner 10 and regulating the returning movement of the lever 18, and a fire extinguishing operating member 37, displacing the hook under engaged condition into the direction of releasing the engagement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extinguishing safety device for preventing gas from spouting in a non-combustion state in a device for heating by burning gas such as a can with a burner.

[0002]

2. Description of the Related Art Conventionally, in a heating device for heating by burning gas, a flame is extinguished due to some cause during combustion, and it is prevented from releasing gas without burning. Various extinguishing safety devices have been proposed in which the ejection of gas is stopped in such an extinguishing state.

Further, as a heating device for heating canned food,
For example, a simple structure having a fuel tank, a burner, and an ignition mechanism arranged at the bottom of a canister holding a can is installed, and gas is ejected from the burner and ignited by operating the ignition lever. It is conceivable that there is a heating device that heats by combustion with a relatively small burner such as a gas lighter, and even in such a simple structure, if the extinguishing occurs due to wind or other causes, the fuel tank capacity will be reduced. Since it is limited, there is also a problem such as insufficient heating, and it is desired to install a safety device that stops the ejection of gas when extinguishing occurs.

[0004]

However, in the case of a simple structure such as the heating device for a can of burner with a burner as described above, an erasure safety device of a simple structure is also required, and the conventional city gas or the like is used. The safety device installed by the above heating device has a problem that the structure is complicated and the cost is disadvantageous.

In view of the above circumstances, it is an object of the present invention to provide an extinguishing safety device applicable to a small and simple heating device.

[0006]

The extinguishing safety device in the heating device of the present invention which solves the above-mentioned problems is deformed in response to the temperature rise accompanying the combustion of the burner which burns the gas fed from the fuel tank. While moving in response to temperature rise deformation of the bimetal member and the bimetal member due to combustion of the burner, while engaging with a part of the operation lever for performing the ignition operation of the burner to restrict the return movement of the operation lever,
In the fire extinguishing state of the burner, a hook that allows the operation lever to move and a fire extinguishing operation member that displaces the engaged hook in the engagement releasing direction are configured.

Further, it is preferable that a heat-sensitive portion for transmitting combustion heat of the burner is connected to the bimetal member.
Further, a linking mechanism for switching the display of the combustion display unit in response to the deformation of the bimetal member may be provided.

[0008]

In the extinguishing safety device of the heating device according to the present invention, when the operating lever is ignited to ignite the burner, gas is ejected from the burner and ignition is performed to start combustion in response to the operation. And
When the combustion by the burner is started, the hook moved in response to the temperature rise deformation of the bimetal member engages with the operation lever, fixes the operation lever in the ignition operation state, and fixes the gas from the burner. The jet is maintained and combustion continues.

On the other hand, when the flame disappears for some reason during the combustion by the burner, the bimetal member is deformed in response to the temperature decrease, and accordingly the hook is disengaged from the engaged state with the operating lever. , The released operation lever returns, and the gas ejection from the burner is stopped.

When the fire is extinguished during combustion, the fire extinguishing operation member is operated to displace the bimetal member in the direction of releasing the engagement with the operation lever, whereby the operation lever is moved. It moves back to stop the gas emission from the burner and digest it.

When the heat-sensitive portion for transmitting the combustion heat of the burner is connected to the bimetal member, the degree of freedom in the disposition position of the bimetal member increases, and the engaging mechanism with the operating lever can be easily constructed. Further, if a linking mechanism that switches the display of the combustion display unit according to the deformation of the bimetal member is provided, it is possible to confirm whether the combustion is being performed or the fire is extinguished.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing the basic structure of a canned product with a burner equipped with a heating device having an extinguishing safety device according to this embodiment.
2 is a plan view thereof, FIG. 3 is a plan view of the heating device, and FIG.
Shows the front schematic structure.

In the canned product with a burner, a cylindrical outer case 2 which is basically open at least at its upper end, and a gap 4 in which combustion gas rises are formed between the outer case 2 and the outer case 2 inside the upper case. And a heating can 6 made up of a cylindrical heat-resistant can body 6c having a lid 6a with an open can pull tab 5 attached to its upper end surface, and the inside of the lower portion of the outer case 2 The heating device 7 is housed and fixed to heat the canned food 6. Further, the heating device 7 includes a burner 10 having an ignition means 8, a fuel tank 12 fixed inside the lower portion of the outer case 2 so as to supply fuel to the burner 10, and an extinguishing safety device 15 (see FIG. 3)), the outer case 2 is formed with a vent hole (not shown) for supplying external air to the burner 10.

The ignition means 8 is provided with an operating lever 18 for supplying gas to the burner 10 and for igniting the operating lever 18. The operating lever 18 extends to both sides of the fuel tank 12.
, One end of which is pivotally supported by a rotation shaft 19, the other end of which is connected in front of the panel 20 by an operating portion 18b, and which is provided so as to rotate in response to the depression of the operating portion 18b. . The rotating shaft 19 has a first arm 21 and a second arm 22 that rotate in accordance with the rotating operation of the operating lever 18.
And are stuck. The first arm 21 operates to open and close in cooperation with a valve mechanism 24 that controls the supply of gas from the fuel tank 12, and the second arm 22 operates a piezoelectric ignition unit 25. , The operating lever 18
The valve mechanism 24 is opened based on the pressing operation of the fuel cell to feed the fuel gas to the burner 10 and the piezoelectric ignition unit.
A discharge voltage from 25 is applied to a discharge electrode (not shown) to perform ignition combustion.

On the other hand, the erasure safety device 15 is provided with a bimetal member 31, as also shown in FIGS. The bimetal member 31 is formed in an inverted U shape, and a short one end fixing portion 31a is fixed to an upper end of a support portion 35 standing upright on the side of the operating lever 18 and extends upward from the fixing portion 31a. The other displacement portion 31c extends downward through the curved portion 31b, and the lower end thereof is connected to a hook 32 that projects outward and has a lower surface that can engage with the lever portion 18a of the operating lever 18. A release portion 33 extending laterally is formed on the opposite side of the hook 32, and a release window 33a is opened in the release portion 33.

Further, the bimetal member 31 has a heat sensitive portion 34 (not shown in FIG. 3) connected to the curved portion 31b thereof. The heat sensitive portion 34 is formed of a metal having high thermal conductivity, one end thereof is fixed to the bimetal member 31, and the other end thereof is formed so as to extend in the vicinity of the burner 10 and receives the combustion heat of the burner 10. It is to be transmitted to the bimetal member 31, and as the bimetal member 31, it is preferable to form a multilayer structure in which a member having high heat conductivity such as copper is laminated in the central portion.

When the temperature rises, the bimetal member 31 is deformed in the expanding direction so that the radius of curvature of the curved portion 31b is increased. It is configured to move above the portion 18a. Further, the lower end position of the hook 32 is engaged with the upper side of the lever portion 18a to lock the operation lever 18 in the ignition operation position when the operation lever 18 is in the depressed position, that is, the ignition operation position. Is set.

A fire extinguishing member 37 is provided in association with the releasing portion 33 of the bimetal member 31. This fire extinguishing operation member
As shown in FIG. 5, a front portion of the 37 is formed into a push button portion 37a and is supported by the panel 20 in a penetrating manner, and a plate portion 37b extending rearward is provided at the back portion of the push button portion 37a. It is inserted through the release window 33a of the release section 33. Further, the fire extinguishing operation member 37 is urged in the projecting direction by a spring 39 which is inserted into the holder 38 and interposed at the tip.
In addition, a taper portion 37c is formed on one side of the plate portion 37b.
The tapered portion 37c is engaged with the edge of the release window 33a so that the hook 32 of the bimetal member 31 can be displaced in the backward direction.

Further, between the outer peripheral surface of the outer case 2 and the can body 6c of the canned product 6, there is formed a gap 4 through which the combustion gas rises.
And a means for fixing the can body 6c are also provided. That is, as shown in FIGS. 1 and 2, a vertically extending triangular corrugated partition plate 9 is provided between the outer case 2 and the can body 6c, and the corrugated partition plate 9 is the lower end of the can body 6c. Is formed to extend downward. At this time, the partition plate 9 has a function of fixing both, and the partition plate 9
The inner space 9a of the wavy shape becomes the gap 4 in which the combustion gas rises.

Although not shown, the panel 20 of the outer case 2 has a window through which it is possible to confirm whether the flame of the burner 10 is burning or not and the amount of residual fuel in the fuel tank 12. A graduated window is formed to identify

To explain the operation of the above embodiment, first, in a fire extinguishing state such as a stored state in which the operating lever 18 is not operated, the operating portion 18b of the operating lever 18 is in the raised position, and the bimetal member 31 is also in the non-operating state. In the deformed state, the hook 32 is in the retracted position that allows the operation lever 18 to move up and down. In order to start the combustion by the burner 10 from this state, Fig. 5 (A)
And as shown in FIG. 6 (A), when the ignition operation of depressing the operation lever 18 is performed, gas is ejected from the burner 10 to ignite, but the bimetal member 31 is still heated and deformed immediately after combustion. Not, the hook 32 is in the retracted position.

After the start of combustion, when a predetermined time elapses while the operation lever 18 is pushed down, the bimetal member 31 receives combustion heat from the heat-sensitive portion 34 and is thermally deformed, so that the bimetal member 31 shown in FIGS. ), The hook 32 is deformed so as to project above the lever portion 18a of the operating lever 18, and even if you release your hand from the operating lever 18, the bottom of the hook 32 locks the lever portion 18a and the operating lever 18a The return rotation in the ascending direction is prevented, and the ejection of gas from the burner 10 is maintained to continue the combustion.

In the above combustion state, when the burning flame is extinguished due to the influence of wind or liquid spillage,
The bimetal member 31 deforms in the backward direction as the temperature decreases, and the hook 32 comes off the lever portion 18a of the operation lever 18,
The operation lever 18 is returned and rotated in the ascending direction, the gas supply to the burner 10 is stopped accordingly, and the ejection of gas in a fire extinguishing state is prevented.

On the other hand, when the fire is extinguished after the heating is completed from the combustion state, as shown in FIG.
When the push button portion 37a of is pushed in, the hook portion 32 of the bimetal member 31 is moved backward by the taper portion 37c via the release portion 33, and the hook 32 portion is moved to the lever portion 18 of the operation lever 18.
When the control lever 18 is disengaged from a, the operating lever 18 is returned and rotated in the ascending direction, the gas ejection is stopped, and the fire is extinguished.

When heating the canned product 6, the pull tab 5 is pulled up to open a small hole, and the burner 10 is directly heated from the bottom of the can body 6c by the flame ignited and ejected. However, the lower end of the partition plate 9 is the can body.
Since it is lower than the bottom of 6c, burner 10
The hot air caused by the flame rises only in the inner space 9a facing the peripheral wall of the can body 6c inside the partition plate 9 to efficiently heat the canned product 6 and suppress the temperature rise of the outer case 2. .

FIG. 7 shows a modification of the hook. Although the hook 32 of the above-mentioned embodiment is formed integrally with the bimetal member 31, in this modification, the hook 42 is independently constituted by the V-shaped rotating arm.

That is, in the hook 42, an intermediate fulcrum portion 42a is rotatably supported, and the tip of one inner arm 42b is engaged with the tip (pin) of the displacing portion 31c of the bimetal member 31, and depending on its thermal deformation. 7 (A) swings from the low temperature state of FIG. 7 (A) to the temperature rising state of FIG. 7 (B), and the tip of the other outer arm 42c moves above the lever portion 18a of the operating lever 18 and can be engaged. It is provided in.

In this modification, the magnification of the displacement amount can be adjusted by changing the length of the arms 42a and 42b, and the operating force can be increased.

Further, the extinguishing mechanism in the modified example of FIG.
Although not shown, a releasing portion 33 having a releasing window 33a similar to that in the previous example may be connected to the bimetal member 31 and operated by the fire extinguishing operation member 37 having the push button portion 37a. The fire extinguishing operation member may be arranged so as to directly rotate the arm in the fire extinguishing direction.

Next, FIG. 8 shows a modification of the bimetal member. The bimetal member 44 of this example is linear and has an upper end portion 44a fixed to the support portion 46, and the upper end portion 44a has a heat-sensitive portion.
45 is connected, and the lower end 44b is configured to be curved and deformed toward the operation lever side due to the temperature rise.
A hook 32 for locking the lever portion 18a of the operation lever 18 is formed on 44b in the same manner as in the previous example.

Further, the fire extinguishing operation member 47 is constructed in the shape of a lever which can be operated in the vertical direction, and the hook 32 operates the operation lever.
Fire extinguishing member 47 moved down with 18 locked
By this, the lower end portion 44b of the bimetal member 44 retracts and is displaced in the direction of releasing the engagement of the hook 32. It should be noted that the fire extinguishing operation member 47 may be configured similarly to the previous example, and the structure of this example may be applied to the previous example.

Further, FIG. 9 shows another modification of the bimetal member. In this example, the bimetal member 49
Is formed so that one end thereof is restrained by the supporting portion 50a and the other end thereof is supported by the slidable supporting portion 50b, and the central portion 49a is moved forward and backward by the curved deformation thereof.
A heat-sensitive portion 51 is connected to a and a hook 52 for engaging with the lever portion 18a of the operation lever 18 is formed. Further, the fire extinguishing operation member 53 is provided in a structure in which the bimetal member 49 is directly retracted by a pushing operation.

In this example, the deformation stress of the bimetal member 49 is large, which is advantageous for application to a mechanism that requires a large operating force.

Next, FIG. 10 shows an example in which a linkage mechanism 56 for switching the display of the combustion display section 55 formed on the panel 20 is provided in response to the thermal deformation of the bimetal member 31 in the example of FIG. It is a thing.

That is, the linking mechanism 56 is composed of a rotating arm 57 which is engaged with the bimetal member 31 at one end and swings in response to thermal deformation of the bimetal member 31, and a display plate 58 is provided at the tip of the rotating arm 57. Are configured so that the display of the opening 20a of the combustion display section 55 can be switched by sliding the display plate 58.

FIG. 11 shows another embodiment of the linkage mechanism for switching the display of the combustion display section 55. That is, the linkage mechanism 60 is composed of a rotation lever, and the display plate 60a is integrally formed by bending at the tip end portion, and the base end portion 60b is rotatably supported by the support portion 35 supporting the bimetal member 31. ing. Then, the engaging member 36 provided at the displacement tip of the bimetal member 31 is engaged in the middle of the linkage mechanism 60, and the bimetal member 31 from the low temperature state in FIG. 11A to the temperature rising state in FIG. The linkage mechanism 60 rotates in response to the thermal deformation of the display panel 60a so that the display plate 60a faces the opening 20a of the combustion display section 55.

On the other hand, FIG. 12 and FIG. 13 show the heating device 7
In the fuel tank 12, a front portion of a metal cylinder is closed by a transparent plastic, a valve mechanism 24 is attached above the front portion, and a fuel tank 12 is attached to a lower portion of the fuel tank 12. The remaining amount can be monitored from the panel 20. An arm 23 that opens and closes the valve mechanism 24 is swingably disposed, and the arm 23 has an engaging portion 23 provided at one end.
a is engaged with the valve mechanism 24, the upper plate-shaped member extends to both sides, then bends inside the operation lever 18 and extends downward, and the lower end portion 23b is operated to rotate in a horizontal state.
It is provided so as to be engageable with the lower side of the lever portion 18a of 18.

That is, when the operating lever 18 is pushed down, the lever portion 18a is engaged with the lower end portion 23b of the arm 23 to rotate so as to push down, whereby the engaging portion 32a is moved to the valve mechanism 24. Open the fuel tank
It is configured to supply 12 gases to the burner 10. Other than that, the configuration is similar to that of the above-described example, and the erasure safety device 15 is also configured in the same manner.

Further, as the ignition means of the heating device in each of the above-mentioned embodiments, in addition to the above-mentioned push-down type operation lever, a mechanism for swinging in the left-right direction can be appropriately adopted. In response to this, the hook that moves due to the deformation of the bimetal member is redesigned so as to engage with the operation lever.

[0040]

According to the extinguishing safety device for a heating device according to the present invention, a bimetal member which is deformed in response to a temperature rise due to combustion of a burner is provided, and the bimetal member is moved and ignited according to the temperature rise deformation. While a hook that engages with the operating lever for operation is provided, a fire extinguishing operation member that displaces this hook in the disengagement direction is provided. By disengaging from the engaged state and stopping the ejection of gas from the burner, it is possible to add a simple extinguishing safety function that ensures reliable operation even to a small and simple heating device. .

[Brief description of drawings]

FIG. 1 is a cross-sectional side view showing the basic structure of a can with a burner having a heating device equipped with an extinguishing safety device according to an embodiment of the present invention.

FIG. 2 is a plan view of a can with a burner in FIG.

3 is a cross-sectional plan view taken along the line AA of FIG.

FIG. 4 is a sectional front view of a main part taken along the line BB of FIG.

FIG. 5 is a cross-sectional plan view of an essential part showing an operating state of the disappearance safety device.

FIG. 6 is a cross-sectional front view of essential parts showing an operating state of a turn-off safety device.

FIG. 7 is a mechanism diagram showing a modified example of the hook.

FIG. 8 is a mechanism diagram showing a modified example of the bimetal member.

FIG. 9 is a mechanical view showing another modified example of the bimetal member.

FIG. 10 is a mechanism diagram showing a configuration example of a combustion display mechanism.

FIG. 11 is a mechanism diagram showing another configuration example of the combustion display mechanism.

FIG. 12 is a schematic cross-sectional plan view showing a modified example of the ignition means of the heating device.

13 is a schematic sectional side view of FIG.

[Explanation of symbols]

 7 Heating device 8 Ignition means 10 Burner 12 Fuel tank 15 Disappearance safety device 18 Operation lever 18a Lever part 24 Valve mechanism 25 Piezoelectric ignition unit 31,44,49 Bimetal member 32,42,52 Hook 33 Release part 34,45,51 Heat sensitive 37,47,53 Fire extinguishing control member 55 Combustion display 56,60 Linkage mechanism

Claims (3)

[Claims] 1. A heating device provided with a fuel tank for storing fuel, a burner for burning gas fed from the fuel tank, and an operating lever for igniting the burner. A bimetal member that deforms in response to a temperature rise accompanying it, and a bimetal member that moves according to the temperature rise deformation of the bimetal member that accompanies combustion of the burner, engages a part of the operation lever, and returns the operation lever. On the other hand, the heating is provided with a hook that restricts the movement of the operating lever while the burner is in a fire extinguishing state, and a fire extinguishing operation member that displaces the engaged hook in the engagement releasing direction. An extinguishing safety device in the device. 2. The extinguishing safety device in a heating device according to claim 1, wherein a heat-sensitive portion for transmitting combustion heat of the burner is connected to the bimetal member. 3. The extinguishing safety device in a heating device according to claim 1, further comprising a linking mechanism for switching the display of the combustion display unit in response to the deformation of the bimetal member.