JPH0124481Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a reset device for an abnormal pressure safety mechanism in a gas stove.

(Prior art and its problems) In so-called simple gas stoves, which mainly use a detachable small-capacity gas cylinder as a fuel source and do not require a hose connection to the fuel source, the gas cylinder is installed very close to the gas burner. Therefore, it is easily affected by the combustion heat in the burner, and when heated, the internal pressure increases, which is dangerous. To solve this problem, an abnormal pressure safety mechanism has been conventionally provided in the gas supply path to the gas burner, in which a reversing spring reverses to cut off the gas supply path when the supply gas pressure is abnormal.

However, the reversing spring is reversed beyond the dead point when abnormal pressure is applied, and the reversing action closes the valve in the gas supply path, but the gas cylinder is extinguished by the gas control knob. Although it gets cold, even if the abnormally high supply gas pressure is resolved by removing the cylinder by resetting the cylinder set lever, the reversing spring does not receive any force to restore itself beyond the dead point, and the gas supply path remains open. The valve remains shut off. Therefore, when reusing the device, a reset operation is required to return the reversing spring beyond the dead point.

For this reason, a reset rod for returning the reversal spring beyond the dead point is provided in the abnormal pressure safety mechanism so that its passive end faces outside the abnormal pressure safety mechanism, and the passive end of the reset rod is pushed. Conventionally, the passive end of the reset rod is pushed with a finger or a bar member such as a screwdriver.

However, when the reversal spring is reversed beyond its dead point, there is a relatively large resistance, and it is not easy to release the push with fingers, which may cause injury to the fingers. Furthermore, if you use a rod such as a screwdriver, it is easier to apply force than with your fingers, and there is no danger of damaging your hands or fingers, but you will have to prepare or have a rod in advance, and you will not have to go out of your way to use it. There is an inconvenience in having to use it.

Therefore, this idea focuses on the fact that operating members such as the gas cylinder operating knob and gas cylinder set lever are operated when reusing the abnormal pressure safety mechanism after it has been activated. It is an object of the present invention to provide a reset operating device capable of resetting an abnormal pressure safety mechanism without a special member by pushing a rod to restore a reversing spring.

(Means for solving the problem) In order to achieve the above-mentioned purpose, this invention
The gas supply path to the gas burner is equipped with an abnormal pressure safety mechanism that inverts a reversing spring to shut off the gas supply path when the supply gas pressure is abnormally high, and the passive end of the abnormal pressure safety mechanism protrudes outside the mechanism. In a gas stove that is equipped with a reset lever, the gas stove operating knob or the cylinder set lever is equipped with a reset lever that pushes and operates the passive end of the reset lever in conjunction with the essential operation of this operating member when using the gas stove. It is characterized by having a moving part.

(Function) Operating members such as the gas stove operating knob and cylinder set lever are essential operations for opening the gas stove and setting the gas cylinder, and are always operated when using the gas stove.

At the same time as this essential operation, the reset rod pushing part provided on the operating member that performs this pushes the passive end of the reset rod of the abnormal pressure safety mechanism, so that the abnormal pressure safety mechanism is activated. However, you can always reset it and return the gas stove to normal use.

(Embodiment) To explain the embodiment shown in FIGS. 1 to 7, 1 is a gas stove main body, and both side walls 1
a and 1b integrally formed with the bottom wall 1c, an upper plate 4 which integrally forms the rear wall 1d and the top plate 1e of the cooking section 3, and the front side of the cooking section 3. It consists of an opening/closing lid 6 of a cylinder storage section 5 formed next to it and open upward and forward. A gas burner 7 is installed in the cooking section 3, and a soup saucer 9 is removably fitted into a cooking section opening 8 formed in the top plate 1e. A burner port 10 is opened in the center of the soup saucer 9, and while the crater portion of the burner 7 is exposed, trivets arranged radially around the burner port 10 are fixedly installed. The cooking section 3 and the cylinder storage section 5 are separated by a partition wall 1f formed by cutting and raising a part of the bottom wall 1c.
Governor 1 for gas pressure adjustment with cylinder connection port 11
2 is provided, and a gas tank 14 having a gas supply port 13 is connected to this to form a gas supply path 15 from the cylinder connection port 11 to the gas supply port 13, in which the governor 12 and the gas tank 14 are sequentially located in the middle. However, the gas supply port 13 faces into the cooking section 3,
It is intended to be connected to the gas receiving section of the burner 7.

In the governor 12, a pressure regulating chamber 16 is provided which is located in the middle of the gas supply path 15 to regulate the pressure of the supplied gas and allow it to pass therethrough, and an abnormal pressure safety mechanism 17 is also built therein.

The abnormal pressure safety mechanism 17 includes a pressure sensitive chamber 19 that introduces primary gas through a pilot passage 18 branched from the inlet of the gas supply passage 15;
A diaphragm 21 separates the valve chamber 20 from the valve chamber 20 provided in the part through which the secondary gas passes through the pressure regulating chamber 16, and a pressure sensitive Reversal spring 22 in a curved state convex toward the chamber 19 side
is provided in the valve chamber 20, and one end of the head 25 is moved against the reversal spring 22 in the normal position by the biasing force of the spring 23.
A normally open valve body 25 is provided which maintains an open state away from the valve seat 24 in the middle of the gas supply path 15 when a6 is pressed, and when abnormal pressure of the supply gas acts on the pressure sensitive chamber 19, the diaphragm 21 closes the valve chamber 20. When pressed toward the side, the reversing spring 22 is reversed into a convex curved state toward the valve chamber 20 side, and the reversing of the reversing spring 22 causes the valve body 2 to
5 to the valve seat 24 against the bias of the spring 23,
The gas supply path 15 is closed. 26 is a packing attached to the seating portion of the valve body 25 on the valve seat 24.

An operating end 27a is located on the opposite side of the valve chamber 20 from the pressure sensitive chamber 19, and the other end 25 is located on the closing operation direction side of the valve body 25.
The reset rod 2 is brought into abutting state with b, and the passive end 271b protrudes toward the front surface 12a of the governor 12.
7 is provided so as to be slidable in the axial direction. Reference numeral 28 denotes a reset rod holding hole that is continuous with the valve chamber 20 of the governor 12, and a packing 29 is attached to the outer periphery of the reset rod 27 on the working end 27a side to seal between the inner periphery of the holding hole 28 and the inner periphery of the holding hole 28. .

The gas cock 14 is configured to rotate a valve body 30 for opening and closing the gas supply path 15 by means of an operating rod 31 disposed near and parallel to the reset rod 27. , the gas control knob 32 is also the operating lever 3.
1 has an ignition arm 33 at its base, and an operating rod 31, respectively.
It is attached so that it rotates together with the The gas cock operating knob 32 opens and closes the gas cock 14 via the operating rod 31 by rotating the gas cock operating knob 32 to supply and stop the gas to the burner 7, and when the gas cock is opened, the ignition arm 33 is operated to open and close the gas cock 14, and when the gas cock is opened, the piezoelectric element built in is controlled by the ignition arm 33. actuates the piezoelectric ignition means 34 to ignite the supply gas ejected from the burner 7,
It serves as an operating member that controls whether the stove is used or not.

The gas stove operating knob 32, which is an operating member that determines whether or not to use the stove, is also slidable in the axial direction relative to the operating rod 31, and the pin 35 and the boss of the knob 32 are implanted in the operating rod 31. The sliding range is restricted by engagement with an elongated hole 36 formed in the reset rod 32a, and the outer periphery of the rear surface serves as a reset rod pushing portion 37 that pushes the passive end portion 27b of the reset rod 27. Further, a spring 38 is attached around the operating rod 31 to urge the operating knob 32 to always be in a non-pushing position relative to the reset lever 27.

The small-diameter passive end 27b of the reset rod 27 passes through the opening of the holding hole 28 of the governor 12, and a cover plate 39 that protrudes to the outside is attached to the opening with screws 40 to prevent the reset rod 27 from coming off. are doing.

Note that the lower plate 2 and the upper plate 4 refer to the cooking section 3 of the lower plate 2.
The upper plate 4 is inserted into the engagement windows 41 formed on the left and right sides of the side ends.
While engaging the bent pieces 42 protruding to the left and right of the lower edge of the rear wall 1d, the cylinder storage section 5 side end of the upper plate 4 is connected to the upper end bent portions of both side walls 1a and 1b of the lower plate 2. It is attached at two places on the left and right using screws 43 and is integrated. The opening/closing lid 6 has a hook-shaped cross section that closes the open part of the cylinder storage section 5, and has mounting pieces 6 facing upward on the left and right at the ends of a bent edge 6a whose lower edge is bent toward the rear of the main body 1.
b, and insert this mounting piece 6b from below into the windows 2a opened on the left and right sides of the end of the cylinder storage part 5 side of the lower plate 2, and then
Each mounting piece 6b is pivotally supported by a shaft 44 held between the outer portion 2c of each window 2a, and the lid 6 is mounted to be openable and closable.

According to this assembly structure of the main body 1, only two screws 43 and one shaft 44 are required other than the three large members of the lower plate 2, the upper plate 4, and the opening/closing lid 6, which reduces the number of parts compared to the conventional one. It costs much less than the other stuff. Also, when assembling the main body 1, the lower plate 2 and the upper plate 4 are partially engaged, screwed partially, and the opening/closing lid 6 is assembled.
It can be easily performed with a simple pivot. Also lid 6
forms a downward bent edge 6c at the tip of its upper side, and by elastically engaging the bent edge 6c with the head of the screw 43, the lid 6 can be elastically locked in the closed state. This eliminates the need for any special lid locking member or structure. As a result, the cost of the stove is significantly reduced compared to conventional stoves.

In addition, a cut-and-raised wall 1g is formed on the bottom wall 1c of the cooking section 3 to obstruct and prevent the spare cylinder from being stored in the cooking section 3, and the stove is used with the spare cylinder stored in the cooking section 3. The cut-and-raised wall 1g and the cut-and-raised window 1h serve as a safe handhold for carrying the stove body 1, which is convenient.

Furthermore, in the cylinder storage section 5, there is a gas cylinder 4.
A cylinder pressing member 46 that presses the tail end of the cylinder 45 to connect the cylinder 45 to the cylinder connection port 11 of the governor 12.
is slidably provided, and a cylinder set lever 47 is connected to the member 46 to move it forward and backward to attach and detach the gas cylinder 45 to and from the connection port 11. It is made to protrude together with the operation knob 32.

To explain the series of operations below, when the gas cylinder 45 is stored in the cylinder storage section 5 and the cylinder set lever 47 is pushed down to the setting side, the cylinder 45 is moved to the connection port 11 by the cylinder pressing member 46.
connected to. Next, when the gas tank 14 is opened by operating the operating knob 32, the gas from the cylinder 45 passes through the gas supply path 15, passes through the pressure regulating chamber 16, is regulated to a constant pressure, and is then passed through the gas tank 14. The gas is supplied to the gas burner 7. On the other hand, as the knob 32 is operated, the ignition arm 33 on the operating rod 31 activates the piezoelectric ignition means 34, so that the supplied gas ejected from the burner 7 is ignited and combusted.

When the internal pressure of the gas cylinder 45 increases due to heat of combustion in the burner 7 and reaches abnormal pressure, the abnormal pressure safety mechanism 17 built into the governor 12 closes the valve body by reversing its reversing spring 22. 25 into a closed state, and the gas supply path 15 is closed. Therefore,
Since the gas supply to the burner 7 is stopped and the fire is extinguished, the danger of abnormal pressure gas being supplied to the burner 7 and continuing combustion, or that the gas cylinder 45 being further heated and the internal pressure rising thereby, is eliminated. Ru.

When the abnormal pressure safety mechanism 17 is activated, the gas stove 14 is closed by operating the operating knob 32 to the extinguishing side in order to return the gas stove to a non-use state. For safety, the cylinder set lever 47 is pushed upward to the release side to disconnect the cylinder 45 from the connection port 11. This disconnection is performed by the check valve 50 built in the connection port 11 pushing out the nozzle of the cylinder 45 when the cylinder 45 is released from the pressure by the cylinder pressing member 46. Connection port 11 is closed. Therefore, a small amount of gas at or near abnormal pressure is confined within the pressure sensitive chamber 19, and the cause of the abnormal pressure safety mechanism 17's operation has not yet been resolved.

In this state, if you connect the removed gas cylinder 45 to the connection port 11 again after it has cooled down, or connect a cylinder 45 other than the cylinder 45 that has become abnormally pressured instead, you can make sure that the pressure-sensitive chamber 19 is at normal pressure. 45
The cause of the operation of the abnormal pressure safety mechanism 17 is eliminated, and a state where normal pressure gas can be supplied is achieved (the same is true even if the cylinder 45 cools while being connected).

However, the reversing spring 22 remains in an inverted state due to the abnormal pressure, and the abnormal pressure safety mechanism 17 is in a state in which the supply of gas is stopped. Therefore, when operating the operating knob 32 to the ignition side in order to reuse the stove, when it is pushed toward the stove body 1 side, the reset lever 27 is pushed by the reset lever pushing part 37 on the back side, and the reversing spring is activated. 22 can be restored, the abnormal pressure safety mechanism 17 is reset to a state where gas can be supplied, and as the gas tank 14 is opened by operating the operation knob 32 to the ignition side, the gas from the cylinder 45 is released. While the piezoelectric ignition means 34 by the ignition arm 33 begin to be supplied to the burner 7
When the burner 7 operates, the gas ejected from the burner 7 is ignited and combusted. Note that abnormal pressure in the pressure sensitive chamber 19 can be detected by setting the set lever 47 to the mid-operation position and pressing the cylinder 45.
When the check valve 50 is held in a half-open state by being partially disengaged, the high-pressure gas in the pressure-sensitive chamber 19 can be released to the atmosphere and returned to normal pressure. Since this released gas is small, there is no need to worry about it igniting and causing an accident.

The operating knob 32 may be prevented from coming off by having its flange 32b come into contact with the inner side of the opening edge 49a of the operating knob exit hole 49 provided in the side wall 1a of the stove body 1 as shown in FIG. In case, reset rod 2
7 does not need to protrude outside the stove body 1.

In FIG. 9, a cam-shaped reset rod pushing part 51 is provided protruding from the outer periphery of the back surface of the gas cock operating knob 32.
At the intermediate operating position of the operating knob 32, the reset lever pushing portion 51 comes into contact with the passive end portion 27b of the reset lever 27, and pushes the reset lever 27.

In the case of this embodiment, when the operation knob 32 is moved from the extinguishing position to the ignition side in normal use, the reset rod 27 can be pushed during the operation, and a special operation for resetting the abnormal pressure safety mechanism 17 is required. Not necessary. Furthermore, if the operating knob 32 is operated again to the ignition side without the abnormal pressure being released, the reset rod pushing part 51 will again move to the reset lever 2 during the operation.
7, the abnormal pressure safety mechanism 17 is reset again. However, since the cause of the abnormal pressure on the stove has not been resolved, the operating knob 32 is further operated to the ignition side and the reset rod pushing part 51 is disengaged from the reset rod 27. At the same time, the abnormal pressure safety mechanism 1
7 is activated again to cut off the gas supply. Therefore, even though the operating knob 32 once resets the abnormal pressure safety mechanism 17 and operates it to the ignition side, gas is not supplied and ignited.

As a result, the cause of abnormal pressure still persists,
It is possible to proactively notify the user that he or she must either release the release or wait until the release is released.

Turn the operation knob 32 when the cause of abnormal pressure is removed.
When the is operated to the ignition side, the abnormal pressure safety mechanism 17 is reset during the process, and the reset state is maintained from then on and the gas supply is not cut off, so gas is supplied and ignited, and the stove can be used.

The cylinder set lever 47 also connects or disconnects the gas cylinder 45, and is an operating member that controls whether or not the stove is used depending on whether or not gas is supplied from the gas cylinder 45. There is.

It is also possible to reset the abnormal pressure safety mechanism 17 by such a setting operation of the cylinder set lever 47. For example, the operation knob 47a side of the cylinder setting lever in the embodiment described above sets the gas cylinder by rotating downward in an arc around the horizontal axis on which the lever 47 is pivoted. Therefore, a reset rod pushing portion that extends or bends to a position opposite to the operating end 27a of the reset rod 27 is provided in the portion of the lever 47 on the operation knob 47a side.

Then, when the cylinder set lever 47 is operated to the gas cylinder setting side, this reset rod pushing part is moved down along an arcuate trajectory, and the reset rod 27 is operated by the backward movement component at that time. A reset operation can be performed by pushing the end 27a.

(Effects of the invention) Since this invention has the above-mentioned configuration, the operating members such as the gas kettle operating knob and the gas cylinder set lever are used as operating members for performing essential operations such as opening the gas kettle and setting the gas cylinder at the same time. The reset rod pushing part provided on the can push the passive end of the reset rod of the abnormal pressure safety mechanism, and even after the abnormal pressure safety mechanism has activated, it must be reset and the gas stove must be turned on. It can be returned to normal usage.

Therefore, even if the stove is reused after the abnormal pressure safety mechanism has been activated, the abnormal pressure safety mechanism will be set without any special operations just by operating the stove normally. The gas stove can be reused as is.

[Brief explanation of drawings]

Fig. 1 is a slope view of a simple stove showing an embodiment of this invention, Fig. 2 is a vertical sectional view, Fig. 3 is a plan view of a half part, and Figs. 4 and 5 are partial slope views respectively. ,
Figure 6 is a plan view with a part of the main part cut away, Figure 7
8 is a sectional view of the abnormal pressure safety mechanism, FIG. 8 is a plan view of a main part of a modified example, and FIG. 9 is a partial perspective view of another embodiment. 1...Gas stove body, 3...Cooking section, 5...
Cylinder storage section, 11... Cylinder connection port, 12...
Governor for gas pressure adjustment, 13...Gas supply port, 14
...Gaskotok, 15...Gas supply route, {19...
...pressure sensitive chamber, 20 ... valve chamber, 21 ... diaphragm, 22 ... reversal spring, 23 ... spring, 24 ...
Valve seat, 25... Valve body} 17... Abnormal pressure safety device, 2
7...Reset rod, 27a... Working end, 27b...
...Passive end, {32...Gas control knob,
47...Cylinder set lever} operation member, 37,
51... Reset rod pushing part, 46... Cylinder pressing member.

Claims (1)

[Scope of utility model registration request] The gas supply path to the gas burner is equipped with an abnormal pressure safety mechanism that inverts a reversing spring to shut off the gas supply path when the supply gas pressure is abnormally high, and the passive end of the abnormal pressure safety mechanism protrudes outside the mechanism. In gas stoves equipped with reset levers, the gas stove operation knobs and cylinder set levers for attaching and detaching gas cylinders, which control whether the gas stove is used or not, are equipped with the above-mentioned controls, in addition to the essential operations of these operation members when using the gas stove. 1. A reset operating device for an abnormal pressure safety mechanism, characterized in that a reset lever pushing section is provided for pushing and operating a passive end of the reset lever.