JP2557124Y2 - Abnormal pressure safety device for cassette stove - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cassette stove that uses a gas cylinder loaded with a gas cylinder connected to a gas supply path to a gas burner, and supplies gas when the supply gas becomes abnormal pressure due to overheating of the gas cylinder. The present invention relates to a safety device for stopping and ensuring safety.

[0002]

2. Description of the Related Art An apparatus of this type is known from Japanese Utility Model Laid-Open No. 59-54300 proposed by the present applicant.

This device has a safety mechanism for shutting off a gas supply path in response to an abnormal pressure of a supplied gas. Therefore, even if the gas cylinder is overheated and abnormally rises in pressure on the stove, and even if the supply gas pressure becomes abnormal, the safety mechanism shuts off the gas supply path. Extinguish a fire. Therefore, since the gas cylinder is not heated any more and gradually decompresses, it is possible to prevent the gas cylinder from exploding due to abnormal pressure rise.

[0004]

However, it cannot be said that the above-mentioned conventional safety mechanism alone is perfect. For example, cassette stoves can be easily handled and used, so when a large number of people use it at a barbecue party outdoors, place two or more cassette stoves side by side and put a large iron plate on top Is performed.

[0005] In such a case, even if an abnormal pressure is generated in one cassette stove and the safety mechanism operates to extinguish the fire, the other cassette stove continues to burn normally. It is difficult to notice the fire extinguishing state due to abnormal pressure.

In such a situation, the gas cylinder having an abnormal pressure in the extinguished cassette stove is subjected to the heat of combustion in another cassette stove or the radiant heat from the iron plate continuously heated by the other stove. Continue to be exposed,
There is a danger of explosion because it is heated and pressurized.

On the other hand, when handling flammable gas or high-pressure fluid industrially, a safety mechanism for avoiding danger due to abnormal pressure rise or gas leakage has long been provided. JP 5
Japanese Patent Application Laid-Open No. 3-122939 discloses an example for gas leakage. However, no industrial safety mechanism is provided as a single integrated device, and the equipment used, the abnormal pressure detection mechanism, and the alarm are separated from each other.

Accordingly, the above-mentioned industrial equipment is not suitable for housewives and children to use the equipment easily and safely on the basis of sensory judgments. It is difficult.

Japanese Utility Model Application Laid-Open No. 59-5430 provided by the present applicant.
No. 0 discloses an abnormal pressure safety device having a gas shut-off mechanism for shutting off a gas supply path from a gas cylinder when an abnormal pressure is generated. I have.

The gas shut-off mechanism closes the gas supply path when an abnormal pressure occurs during use of the gas stove, and stops the gas supply as a function of the container itself. Therefore, it is possible to prevent the gas pressure from increasing further, which is safe. Further, the gas shut-off mechanism is such that a gas cylinder set lever for connecting or disconnecting the gas cylinder to the gas supply state is returned from the gas supply path shut-off state in conjunction with the operation of connecting the gas cylinder. After the abnormal pressure is eliminated, it is only necessary to follow the normal use procedure, so both the mechanism and operation,
It is suitable for home use that can be easily used by housewives and children.

However, the supply of gas suddenly stops while the gas stove is in use, and the gas burner extinguishes itself. The user does not know the reason for a moment and immediately judges that the mechanism of the gas stove is abnormal, and immediately re-uses the gas stove. There are many cases where you try to operate and continue using it. As long as the abnormal pressure due to overheating of the gas cylinder has not been resolved, even if the gas cylinder is reused, the gas shut-off mechanism restored by the reuse operation will be shut off at the moment the gas cylinder is connected by the gas reuse operation. Therefore, the user is easily confused.

[0012] Therefore, the present invention, without complicating the operation,
It is an object of the present invention to provide a cassette stove abnormal pressure safety device that can be easily noticed by a warning to that effect at the time of fire extinguishing due to abnormal pressure in the cassette stove and that can be used safely without any confusion.

[0013]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a gas shut-off device which shuts off a gas supply line in response to an abnormal pressure in a gas supply line to a gas burner to which a gas cylinder is connected. A gas shut-off mechanism having a valve, a warning means for generating a warning sound in response to a closing operation of the gas shut-off valve of the gas shut-off mechanism, and a state in which the gas shut-off valve of the gas shut-off mechanism is opened by an operation from outside the body. And a warning means for releasing the warning in response to the opening operation of the gas shut-off valve.

[0014]

In the above configuration of the present invention, when the gas stove is overheated when the cassette stove is used and the supply gas becomes abnormally high, the gas shut-off valve of the gas shut-off mechanism functions as a function of the body itself to supply the gas. Since the road is cut off, it can be used under abnormal pressure and safety can be improved.
Since the warning means responds to the shut-off operation of the gas shut-off valve and emits a warning sound as a function of the body itself, it is difficult to see whether the cassette stove being used is visible or not, or whether the user is away from the place. Without exception, the user can easily notice that the fire is extinguished due to abnormal pressure, can cope with the situation without hesitation, can perform the reuse operation in a timely manner, and can easily achieve safe use.

Further, when the gas shut-off valve is returned by an external operation of the return means for the reuse operation, the warning means responds to the return of the gas cut-off valve and the warning is released. The two functions can be restored to a state where they can be reused, and the operation is not particularly complicated, which is convenient for use.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the cassette stove of the embodiment shown in FIGS. 1 to 6, the cassette stove has a box-shaped body 1. FIG. The container 1 has a burner chamber 19 in which a gas burner 2 is installed and a cylinder connection port 4 of a gas supply path 3 to the burner 2. 6 are formed adjacent to each other.

An instrument cock 7 and a gas pressure regulator 8 are sequentially provided in the gas supply path 3 from the burner 2 side. The gas pressure regulator 8 is a die-cast product in which the cylinder connection port 4 is integrally formed, and the vessel 1 in the cylinder chamber 6 is formed.
At the front side position, a cylinder connection port 4 is installed with the cylinder connection port 4 facing the rear side of the body 1, forms an instrument block 71 integrated with the instrument cock 7 of the same die-cast product, and is screwed to the bottom plate 6 a of the cylinder chamber 6 with screws 72 or the like. Fixed.

The gas cylinder 5 is provided with a nozzle 9 protruding from a small-diameter projection 5a at the tip thereof so as to be able to advance and retreat. A valve 10 is provided.

On the other hand, in the cylinder connection port 4, the small-diameter projection 5a of the gas cylinder 5 is tightly fitted via an inner O-ring 11, so that the outermost position in the connection port 4 forms an auxiliary seal and the gas cylinder 5 is connected. Cylinder holding hole 12 for firm holding
A nozzle receiving hole 13 which is concentrically opened with an extremely small diameter in the inner part of the holding hole 12 is provided in two stages.

The nozzle receiving hole 13 is provided with an inner O-ring 14.
The nozzle 9 of the gas cylinder 5 is tightly fitted to form an inner seal portion, and is normally closed by the urging of a spring 15 at the back, and is pushed and opened by the nozzle 9 entering the nozzle receiving hole 13. A valve 16 is provided (FIG. 4).

The cylinder holding hole 12 and the nozzle receiving hole 13
An annular surface step 17 is formed between the two and is formed on an inclined guide surface which inclines inward from the outer diameter side toward the inner diameter side.

Thus, when the gas cylinder 5 fitted into the cylinder chamber 6 is pressed and connected to the cylinder connection port 4 by the forward operation of the cylinder pressing slide member 18 provided at the bottom of the cylinder chamber 6 so as to be slidable back and forth. Even if the nozzle 9 is caught on the annular step 17, the nozzle 9 is guided to slide into the nozzle receiving hole 13 by its inclination, and is automatically fitted into the nozzle receiving hole 13 by this sliding action. Such a connection failure does not occur.

The cylinder pressing slide member 18 abuts on the lower surface of the bottom plate 6a of the cylinder chamber 6 and has two front and rear bottom plates 6a.
Both ends 18a, 18b are connected to the bottom plate 6a through the window 20 at the location.
The cylinder set lever 22, which is held so as to be able to move back and forth toward the upper side and has one side plate 73 of the pressure regulator 8 pivotally supported by the upper cylindrical shaft 21 at the front end 18 a, engages with the arc-shaped cam hole 23 and the shaft 24. The lever 22 is connected via a joint and is moved back and forth by the rotation operation of the lever 22.

The operating portion 22a of the lever 22 is
The spring 26 is projected outwardly from a vertical slit 25 formed on the front surface of the bottom plate 6 and is acted between the cylinder pressing slide member 18 and the striking piece 6b of the bottom plate 6a.
It is urged together with the cylinder pressing slide member 18 in a direction to release the pressing on the gas cylinder 5.

The connection between the cam hole 23 and the shaft 24 is established by operating the lever 22 in the cylinder pressing connection direction (downward) against the spring 26 by pressing the cylinder pressing slide member 1.
8 is lifted against it and moved forward while exerting a component force. By the forward movement of this member 18, the gas cylinder 5 is pushed toward the cylinder connection port 4 by the upward pressing piece 18c at the rear end and connected. I try to make it.

In this connected state, the shaft 24 is engaged with the engaging concave portion 27 at the side edge of the cam hole 23, so that the operating lever 22 is moved together with the cylinder pressing slide member 18 and the spring 26.
Of the cylinder in the cylinder pressing release direction. This stability can be sufficiently obtained without the spring 26 only by the acting force in the cylinder connection releasing direction due to the restoring force of the cylinder nozzle 9 and the cylinder connection check valve 16.

The cylinder pressing slide member 18 has a front end 18 which is a passive end to the cylinder set lever 22.
a, the shaft 24 is provided on a rising passive piece 18a formed on a side edge of the side opposite to the gas burner 2 side, and a cam hole 23 formed at an operating end of the cylinder set lever 22 is provided. Is engaged.

The passive piece 18a slides in contact with the lower part of the gas pressure regulator 8, and is guided when it is moved in the cylinder pressing connection direction while receiving a lifting component.
The distance of the moving path line in the direction perpendicular to the pivot point of the cylinder set lever on the gas pressure adjuster 8 is kept constant, the cylinder set lever 22 is reliably received in the cylinder pressing connection direction without escape, and a large operation force is required. The operation in the pressing connection direction is efficiently and safely achieved with good operation efficiency, and there is no unnatural feeling in operation.

The gas pressure regulator 8 has a plurality of legs 8e, which are integrally suspended from the bottom surface 8d, fixed by screws 72 inserted into the bottom plate 6a from below, and the bottom surface 8d floats from the bottom plate 6a. The cylinder pressing slide member front end 11a is sandwiched between the bottom surface 8d and the bottom plate 6a at the portion.
The front end 18a slides on the upper surface of the bottom plate 6a,
There is an escape window 18e for the leg 8e, and this escape window 18e
Of the lower edge of the leg 8e is formed on the outer periphery of the lower end of the leg 8e.
Is guided by the gas pressure regulator 8 with respect to the front end 18a at the time of the cylinder pressing connection direction operation.

When the cylinder 18 is operated in the cylinder pressing release direction, the front end portion 18a is moved in the cylinder pressing releasing direction while receiving a component force depressed from the cylinder setting lever 22. As the urging force in the moving direction is working, it moves independently, and the pushing force is reduced to the extent that it does not affect. Even if a large pressing force is exerted, the front end 18a is firmly guided by the portion which is screwed to the leg 8e of the bottom plate 6a 72 and is attracted to the gas pressure regulator 8, so that there is no escape to the operating force. Does not occur.

The gas pressure regulator 8 is provided with a cylinder connection port 4 on the side opposite to the gas burner 2 side, and pivotally supports a cylinder set lever 22 on the side surface opposite to the gas burner 2 side. That the cylinder connection port 4
The connection point between the cylinder pressing slide member 18 and the lever 22 whose center line coincides when viewed from the plane is
, The operating force transmitted from the lever 22 to the member 18 can prevent the member 18 from being deformed or rattled in the horizontal plane direction.

On the front face of the gas pressure regulator 8, a cylinder 30 is fitted to the operating shaft 28 of the instrument cock and the protruding shaft 29 on the front face of the gas pressure regulator 8 to hold the holes 30 and 31 so as to be movable left and right. A set prevention stopper 32 is provided. The stopper 32 is formed by a projection 33 formed on the front surface of the gas pressure regulator 8 so as to be engaged in the elongated hole 31 and a spring 34 stretched between a left edge of the elongated hole 31 in FIG. To the right in FIG.

The rightward movement by this urging causes the distal end locking portion 32a
Moves into the downward movement trajectory of the cylinder set lever 22 to prevent the gas cylinder 5 of the lever 22 from being pressed and connected to the cylinder connection port 4, that is, the cylinder set operation.

The stopper 32 is provided with a passive bending piece 37 facing a projection 36 formed on the back surface of the operation knob 35 of the instrument cock 7. When the operation knob 35 is returned to the fire extinguishing position, the passive bending piece 37 is pushed to the left by the projection 36 to stabilize the stopper 32 at the left movement position, and the distal end locking portion 32a is operated by the operation lever. 22 is retracted out of the downward movement locus, and if the operation knob 35 is in the operation position for opening the cock 7 even a little, the passive bending piece
37 is released from the pushing by the projection 36, and the stopper 32
Is moved rightward by the spring 34.

Thus, the cylinder setting operation by the cylinder setting lever 22 is enabled when the appliance cock operation knob 35 is at the fire extinguishing position, that is, when the appliance cock 7 is closed. Is open, the gas cylinder setting operation is prevented, and the gas cylinder 5 is connected to the cylinder connection port 4 without knowing that the appliance cock 7 is open. The inconvenience of inadvertent outflow of gas is eliminated.

In the gas pressure regulator 8, a primary chamber 8a communicating with the cylinder connection port 4 of the gas supply path 3 and a secondary chamber 8b communicating with the appliance cock 7 and the burner 2 are defined by a diaphragm 38. From the primary room 8a to the secondary room 8
The opening of the gas outlet 8c to the secondary side chamber is adjusted by the valve 40 at the tip of the lever 39 interlocking with the diaphragm 38 in accordance with the pressure of gas supplied from the gas cylinder 5 acting in the primary side chamber 8a. A constant pressure gas always flows into 8 b and is supplied to the burner 2.

The gas cylinder 5 is cooled by being deprived of heat of vaporization when the liquefied gas flows out and is vaporized. However, in order to stably supply the gas, the gas cylinder 5 receives the heat of combustion in the burner 2 and keeps the room temperature. In some cases, the temperature may rise excessively depending on the use conditions such as the combustion state, the outside air temperature, the radiant heat from the iron plate, and direct sunlight.

Such an excessive rise in temperature causes an abnormal increase in the internal pressure of the gas cylinder 5, exceeding the pressure regulating capability of the gas pressure regulator 8, causing abnormal combustion, or causing an explosion of the cylinder. Dangerous. Therefore, when the gas supplied from the gas cylinder 5 is at an abnormal pressure, the gas pressure regulator 8 closes the gas supply path 3 to stop the supply of gas to the burner 2. An abnormal pressure safety mechanism 41 for preventing the pressure from being applied is provided on the body 1 itself.

The gas shut-off mechanism 41 includes a pressure-sensitive chamber 43 for introducing a primary gas before pressure adjustment through a pilot passage 42 branched from a primary side of the gas supply path 3, and a secondary pressure-sensitive secondary gas after the gas supply path 3 is adjusted. A valve chamber 44 provided in a portion through which gas passes is partitioned by a diaphragm 45, and a reversing spring 46 attached to the valve chamber 44 side of the diaphragm 45 together with the diaphragm 45 and having a curved state normally convex toward the pressure-sensitive chamber 43. Is provided.

One end 48a is pressed against the reversing spring 46 in the normal posture by the bias of the spring 47 into the valve chamber 44, and the normally open state is maintained in the open state away from the valve seat 49 in the gas supply path 3. A gas shut-off valve 48 is provided, and when an abnormal pressure of the supply gas acts on the pressure-sensitive chamber 43, the diaphragm 45 is pressed toward the valve chamber 44 to invert the reversing spring 46 into a curved state convex toward the valve chamber 44, Due to the reversal of the reversing spring 46, the gas shut-off valve 48 is pressed against the valve seat 49 against the bias of the spring 47, and the gas supply path 3 is closed as a function of the body 1 so that the gas supply is cut off and automatically extinguished. Like that.

Reference numeral 50 denotes an O-ring mounted on a seat of the gas shut-off valve 48 with respect to the valve seat 49.

On the opposite side of the valve chamber 44 from the pressure sensing chamber 43, a reset rod 51 whose axis is perpendicular to the gas shut-off valve 48, vertically passes through the center of the protruding shaft 21, and one end of the operating portion 51a projects outside.
Is provided as a main member of a return means for returning the gas shut-off valve 48, and is rotatably fitted and held. Reset rod
The cam 51c is formed on the other end 51b of the 51 so as to face the other end 48b of the gas shutoff valve 48. The cam portion 51c has a flat shape in which a circular shaft is cut off from both sides.

A passive lever 52 is mounted on one end 51a of the reset rod 51 as a non-circular shaft.
The setting operation for setting the gas cylinder 5 by the lever 22 to the connected state by rotating the lever 22 and the passive lever 52 integrally by engaging the protruding protruding piece 22b of the cylinder set lever 22 with the lever 22a. Gas shut-off valve 4 in conjunction with
A return means operable from the outside for returning the position 8 together with the reversing spring 46 is constituted.

FIGS. 1 to 6 show a state in which the gas cylinder 5 is reset to a disconnection state.

In this state, the cylinder set lever 22 is stabilized at the pivot position shown in the drawing where the operating portion 22a is at the uppermost position. This stability is due to the positional relationship that does not exert a rotational force on the cylinder set lever 22 via the shaft 24 and the cam hole 23 as the cylinder pressing slide member 18 is moved to the retracted position by the bias of the spring 26. .

[0046] By rotated together with the bomb set lever 22 via the passive lever 52 is reset rod 51 this time, the direction in which scraping face 51c ₁ of the cam portion 51 is horizontal (Fig. 2,
FIG. 6 solid line). The cam portion 51 of this for resetting rod 51 has its non-scraped face 51c ₂ is opposed to the other end 48b of the valve body 48.
Non scraped face 51c ₂ is a radially outer surface of the reset rod 51, significantly larger than the center distance of the scraping surface 51c ₁ from the reset rod 51.

Therefore, the non-sharpened surface 51c ₂ is
It is pressed by a spring 47 against a reversing spring 46 that is convexly curved to the side and abuts on or is close to the other end 48b of the gas shut-off valve 48 in the open position (solid line in FIG. 2).

When the cylinder is not set as described above, the cylinder setting lever 22 is moved downward in the direction of the arrow shown in FIG. 6 to move the cylinder pressing slide member 18 forward.
When the gas cylinder 5 is set, the reset rod
51 is also rotated by the same lever as the cylinder set lever 22 via the passive lever 52, and is rotated by approximately 90 °. As a result, the reset rod
The cam portion 51 of the 51 can be turned by approximately 90 ° from the non-cylinder set state as shown by the imaginary line in FIGS.

Thus, the cam portion 51 of the reset rod 51 is
Its scraped face 51c ₁ is oriented opposite to the other end 48b of the gas shut-off valve 48. The scraped surface 51c ₁ is a which has been scraped off the outer surface of the reset lever 51, since the distance from the center line of the reset rod 51 is smaller than that of the non-shaving surfaces 51c _2, shown in Figure 2 phantom line Thus, a sufficient space S is generated between the other end 48b of the gas shut-off valve 48 and the gas shut-off valve 48 for the closing operation.

The gas shut-off valve 48 is normally in an open position where it is pressed against a spring 47 by a reversing spring 46 that is convex and curved toward the pressure-sensitive chamber 43. On the other hand, when the gas pressure rises abnormally for some reason while the gas cylinder 5 is set and used, the reversing spring 46 is reversed to a convex curved state toward the valve chamber 44 in response to the gas pressure. Attempts to retract 48 against spring 47.

At this time, since the space S is formed between the other end portion 48a of the gas shut-off valve 48 and the cam portion 51c of the reset rod 51, the gas shut-off valve 48 can be retracted. The reversing operation is not hindered, and the reversing operation of the reversing spring 46 retreats to the closed position to prevent the outflow of the gas as a function of the container 1 itself at the time of abnormal pressure rise, thereby making it possible to use safely.

Once the reversing spring 46 is inverted to the curved state convex to the valve chamber 44 side, it does not return to the original curved state convex to the pressure sensitive chamber 43 as it is. Therefore, use cannot be resumed.

To return the reversing spring 46, the container 1
The reset operation is performed by using the reset rod 51 provided for.
This will be described. Cylinder set lever 22 to body 1
By operating the operation portion 22a facing the outside of the cylinder, the cylinder is returned to the cylinder reset position shown in FIG.

At this time, the reset rod 51 is also rotated together with the reset rod 51 and returned to the position shown by the solid line in FIGS.

As a result, the cam portion 51 of the reset rod 51 is
The non-sharpened surface 51c ₂ is opposed to the other end portion 48b of the reset rod 51, and projects toward the gas shut-off valve 48 by the amount of the space S or closer to the shaved surface 51c ₁ ;
The gas shut-off valve 48 is pushed toward the reversing spring 46.

At this time, the gas shut-off valve 48 pushes the reversing spring 46, which has been inverted to a curved state convex toward the valve chamber 44, back to the pressure sensing chamber 43, and moves the reversing spring 46 toward the pressure sensing chamber 43. Return to the convex curved state. In this state, if the cylinder set lever 22 is moved downward so as to set the gas cylinder 5, it returns to the normal use state shown by the phantom lines in FIGS. 2 and 6 as a function of the body 1 itself.

In the figure, 53 is a mounting screw for the stopper 32, 54
Is a snap ring for retaining the passive lever 52.

Further, the burner 2 has a main body 2a having an annular gas receiving chamber 55 opened upward at the upper end thereof, and a main body 2a.
A head 2b which forms an outer flame hole 57 with the main body 2a fitted with the screw 56 by screwing into the upward opening 55a of the annular gas receiving chamber 55 of 2a, and the head 2b is provided with an inner flame hole 57a. I have. The main body 2a is located below the annular gas receiving chamber 55.
A mixing tube 58 is formed integrally.

The mixing tube 58 is provided to be long enough so as to cross the lower part of the main body 2a, with the amount of protrusion from the main body 2a being small, and to be connected to the gas supply passage 3 protruding from the main body 2a. From 58a, communication part with annular gas receiving chamber 55
The diameter of the gas is gradually increased to 58b, and the gas supplied to the burner 2 is communicated with the communication portion 58 in the long mixing pipe 58 with the diameter increasing gradually.
While the power is weakened to the point b, the air is sufficiently mixed with the outside air sucked at the negative pressure at the connection end 58a.

A communicating portion of the mixing pipe 58 with the gas receiving chamber 55
58b, because of the length of the mixing tube 58,
The ignition plug 59 is far away from the ignition position where the ignition plug 59 is disposed in the vicinity, and the outflow of the supply gas from the outer flame hole 57 at the ignition position is delayed from the outflow from the other parts, and the ignition operation is accordingly performed. Is late.

As a result, there is an inconvenience that the ignition is slightly delayed, or that the first cock opening operation is not fired and the cock opening operation for the ignition must be performed in a hurry. To solve this, the main body 2a
On the side where the ignition is performed, a bypass 60 is formed from the mixing pipe 58 to the gas receiving chamber 55 to expedite gas outflow from the ignition part side outer flame hole 57 so that ignition is not delayed.

Reference numeral 61 denotes a lid that closes the molding hole 58c for forming the mixing tube 58, 62 denotes a soup tray, 63 denotes a gode, 64 denotes a cylinder chamber lid, and 65 denotes a lid 64.
The reference numeral 66 designates an internal flame air intake passage of the burner 2.

Further, an abnormal pressure warning means 101 which works simultaneously with the gas shut-off mechanism 41 is provided in the body 1 itself. The abnormal pressure warning means 101 uses the buzzer 102 as a warning device. The buzzer 102 has a screw 1 on the bottom plate 103 of the body 1.
The switch 105 is mounted by a switch 105 and turned on in conjunction with a gas supply path cutoff operation of the gas cutoff mechanism 41. Therefore, no special single operation is required for this. Reference numeral 106 denotes a power supply for the buzzer 102. The power supply 106 is also attached to the bottom plate 103 of the body 1 with screws 108.

The switch 105 is provided with a screw 111 on a rim-shaped wall 109 integrally formed below the valve chamber 44 of the gas shut-off mechanism 41.
Installed by. The valve chamber 44 is provided with a switch operation rod 112 facing the switch 105.

The switch operating rod 112 is pressed by the spring 114 against the small-diameter portion 113 of the gas shut-off valve 48, and when the gas supply passage 3 of the gas shut-off valve 48 is shut off, the switch operating rod 112 is pressed against the small-diameter portion 113 of the gas shut-off valve 48. In response to the subsequent step 115, the switch 105 serving as a warning means is turned on.

The ON operation of the switch 105 is maintained until the gas shut-off mechanism 41 is reset, and the buzzer 102, which is the output unit of the warning means, continues to emit a warning sound as a function of the body 1 itself. Therefore, it is possible to promptly and surely take measures for an abnormal situation.

The switch 105 is also turned off in response to the gas shut-off mechanism 41 being reset to a normal use state by the function of the return means interlocked with the setting operation of the lever 22, so that this switch is also operated by a special operation. Returned without. That is, the two functions can be returned to a state where they can be reused by one operation, so that the operation is simple. However, the specific structures of the gas shut-off mechanism 41, the warning means and the return means are limited to this embodiment. Can be variously designed.

In addition, a device that generates a warning sound may use a proper device other than a buzzer, and in some cases, a display indicating occurrence of abnormal pressure or necessary measures may be simultaneously lit. Further, the warning sound can be sound. Again, warnings and actions can be expressed.

In short, according to this embodiment, when the cassette stove is used, the gas cylinder 5 is pressurized due to overheating or the like,
When the supply gas has an abnormal pressure, the gas shut-off valve 48 of the gas shut-off mechanism 41 functions as a function of the body itself and shuts off the gas supply passage 3, so that use under abnormal pressure can be prevented and safety can be achieved. At the same time, the switch 105 of the abnormal pressure warning means 101 responds to the shut-off operation of the gas shut-off valve 48, and the buzzer 102 emits a warning sound as a function of the body itself.
Whether you can see the cassette stove you are using or not, or if the user is away from the place,
The user can easily recognize that the fire is extinguished due to abnormal pressure, respond to this without any confusion, and can perform the reuse operation with the lever 22 in a timely manner, thereby easily achieving safe use.

When the gas shut-off valve 48 is returned by the reset rod 51 or the like serving as a return means for the re-use operation, the abnormal pressure warning means 101
Responds and cancels the warning by the buzzer 102.
With two operations, two functions can be returned to a state where they can be reused, and the operation is not particularly complicated, which is convenient for use.

[0071]

According to the present invention, when the cassette stove is used, when the gas cylinder is pressurized due to overheating or the like and the supply gas becomes abnormally high, the gas shut-off valve of the gas shut-off mechanism functions as a function of the container itself, and the gas is used. Since the supply path is shut off, use under abnormal pressure can be prevented and safety can be improved.
Since the warning means responds to the shut-off operation of the gas shut-off valve and emits a warning sound as a function of the body itself, it is difficult to see whether the cassette stove being used is visible or not, or whether the user is away from the place. Without exception, the user can easily notice that the fire is extinguished due to abnormal pressure, can cope with the situation without hesitation, can perform the reuse operation in a timely manner, and can easily achieve safe use.

When the gas shut-off valve is returned by an external operation of the return means for the re-use operation, the warning means is released in response to the return of the gas cut-off valve and the warning is released. The two functions can be restored to a state where they can be reused, and the operation is not particularly complicated, which is convenient for use.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view of a part of a cassette stove as an embodiment to which the present invention is applied.

FIG. 2 is a partial plan view of a half of a main part of the cassette stove shown in FIG.

FIG. 3 is a front view of a cross section of a cylinder setting mechanism of the cassette stove of FIG. 1;

FIG. 4 is a side view of a part of the cassette stove shown in FIG.

FIG. 5 is a partial cross-sectional view showing a relationship between a gas shut-off mechanism and a switch for warning at abnormal pressure.

FIG. 6 is a partial exploded perspective view showing a relationship between a gas shut-off mechanism and a switch for warning at abnormal pressure.

[Description of Signs] 2 gas burner 3 gas supply path 4 cylinder connection port 5 small-volume gas cylinder 6 cylinder chamber 18 cylinder pressing slide member 22 cylinder set lever 41 gas shutoff mechanism 44 valve chamber 48 gas shutoff valve 51 reset rod 51c cam section 101 Abnormal pressure warning means 102 Buzzer 105 Switch 106 Power supply 112 Switch operation means 115 Step

Claims (1)

(57) [Scope of request for utility model registration] The gas supply path is shut off in response to an abnormal pressure in a gas supply path to a gas burner to which a gas cylinder is connected.
A gas shut-off mechanism having a shut-off valve, gas of the gas blocking mechanism
And warning means for in response to the closing operation of the scan shutoff valve emits a warning sound, gas in the gas shut-off mechanism by operation from the outside of the device body shield
And a return means attempting to bring the state to open the sectional valves, warning hand
The stage releases the warning in response to the opening operation of the gas shutoff valve.
Cassette stove abnormal pressure safety device, characterized in that had Unishi.