JPH08303774A - Fire force adjusting mechanism at ignition of gas apparatus - Google Patents

Abstract

PURPOSE: To check increase in production cost and mounting space by allowing blocking of a burner from being ignited at a large fire force with a simple structure. CONSTITUTION: This mechanism is attached to a gas apparatus which has a burner B with a fire force adjustable, an ignition/extinguishing mechanism 100, a main valve M provided on a gas passage 11 for supplying a fuel gas to the burner B, a working bar 5 which is provided on the gas passage 11 to open or close the main valve M interlocking the operation of the ignition/ extinguishing mechanism 100 and a push/push mechanism 30 which sets the working bar 5 at an ignition position in the operation of ignition, displaces it 5 to a burning position after the end of the ignition operation and returns it 5 to an extinguishing position during the extinguishing operation. A resistance increasing means 17 is provided to increase a passage resistance of the gas passage 11 only when the working bar 5 is set at the ignition position and a fire force of a burner B at the ignition is held at a medium level.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal power adjusting mechanism for automatically setting the thermal power of a burner to a level at which ignition is easy and safe during ignition.

[0002]

2. Description of the Related Art In a gas appliance such as a table stove, a point / fire extinguishing mechanism for igniting and extinguishing the burner and a heat power adjusting mechanism for adjusting the gas flow rate of the fuel gas to increase or decrease the heat power of the burner are provided. Is provided. From the viewpoint of operability, the point / fire extinguishing operation is often performed by pushing the ignition knob in the front-back direction such as the point / fire extinguishing button, but there are also gas appliances operated by rotating the knob. The operation of the thermal power adjustment mechanism is provided with a slide type operation lever for continuously adjusting the thermal power from low to medium to high or vice versa, and the operation knob for thermal power adjustment attached to the front end of the operation lever is moved to the left or right. It is done by sliding in the direction.

In the gas equipment, a direct ignition system in which an air-fuel mixture of fuel gas and combustion air is ignited by an ignition source such as a discharge spark is often used. In order to carry out this direct ignition smoothly and surely, it is desirable that the heat power of the burner is set to a medium heat power at the time of ignition. In recent years,
There is a demand for the use of a high-power burner, and for the elderly and users who wear clothing with sleeves such as cooking clothes, there is a risk that the sleeves may ignite if the heating power at ignition is too large.
For this reason, conventionally, a number of ignition power adjustment mechanisms for ignition have been proposed in which the operation lever for adjusting the ignition power is forcibly and automatically set to a medium heat position suitable for ignition in conjunction with the ignition operation.

[0004]

In the conventional ignition power adjusting mechanism for ignition, a link mechanism is provided between the point / fire extinguishing mechanism and the ignition adjusting valve to prevent the ignition power from becoming excessive. . Therefore, there is a drawback that the structure of the link mechanism is complicated and the cost and the mounting space increase. An object of the present invention is to provide a fire power adjustment mechanism at the time of ignition, which can prevent the burner from igniting with a large heat power with a simple structure and can also prevent an increase in manufacturing cost and installation space. In the present invention, the medium heat power means a heat power within a predetermined range suitable for ignition between the high heat power and the low heat power.

[0005]

DISCLOSURE OF THE INVENTION The present invention is directed to a burner whose heat power can be adjusted from low to high, a point / fire extinguishing mechanism for igniting or extinguishing the burner, and a fuel gas for the burner. An opening / closing valve provided in a gas flow path for supplying the gas, an operating member provided in the gas flow path, for opening / closing the opening / closing valve in conjunction with the operation of the point / fire extinguishing mechanism, and at the time of ignition operation. A gas device including a position setting mechanism of the operating member, which sets the operating member to an ignition position, displaces the operating member to a combustion position after completion of ignition operation, and returns the operating member to a fire extinguishing position during a fire extinguishing operation. It is attached and comprises resistance increasing means for increasing the flow path resistance of the gas flow path only when the operating member is set to the ignition position, and determines the flow rate of the fuel gas at the time of ignition by the thermal power of the burner. Thermal adjustment mechanism during ignition, characterized in that to limit the flow rate to be middle-fired.

According to a second aspect of the present invention, there is provided a fire power adjusting mechanism for ignition, wherein the point / fire extinguishing mechanism is a switch mechanism that reciprocates by a manual operation, and the actuating member is provided with the gas passage and the on-off valve. It is an actuating rod that is inserted into the valve body and is interlocked with the switch mechanism.

According to a third aspect of the present invention, there is provided a thermal power adjusting mechanism for ignition, wherein the switch mechanism includes a guide frame and a switch main body fitted in the guide frame so as to be movable back and forth. It is characterized in that it is constituted by a collar-shaped portion provided on the actuating rod interlocking with the switch body, and a throttle portion provided inside the valve body.

According to a fourth aspect of the present invention, there is provided a fire power adjusting mechanism for ignition, wherein the position setting mechanism moves the actuating member to an ignition position by operating a fire extinguishing position of the point / fire extinguishing mechanism, and stops the operation. It is a push-push mechanism that returns the operating member to the intermediate combustion position and returns the operating member from the intermediate combustion position to the original fire extinguishing position by performing the operation again.

According to a fifth aspect of the present invention, there is provided a fire power adjusting mechanism for ignition, wherein the point / fire extinguishing mechanism is a switch mechanism that reciprocates by a manual operation, and the push / push mechanism is provided in the switch mechanism. Characterize. A gas device according to a sixth aspect of the present invention includes a thermal power adjustment mechanism during the ignition.

[0010]

According to the present invention, the ignition power adjusting mechanism at the time of ignition is provided in the gas passage for supplying the fuel gas to the burner. Therefore, as compared with the case where the ignition power adjustment mechanism is not provided, it is possible to prevent the increase in the size of the device and the complication of the mechanism while improving the safety during ignition. In the configurations of claims 2 to 5, the fuel gas valve mechanism of the gas equipment can be used as it is to form the thermal power adjustment mechanism at the time of ignition. The gas equipment according to claim 6 can improve safety at the time of ignition at low cost.

[0011]

1 to 3 show a combustion adjusting unit U including a point / fire extinguishing mechanism 100 of a stove burner B, a heat power increasing / decreasing mechanism 200, and a heat power adjusting mechanism 300 at the time of ignition. The combustion adjusting unit U is mounted inside the table stove T shown in FIG. On the front surface of the table stove T, a point / fire extinguishing button 10 for operating the point / fire extinguishing mechanism 100.
5 (shown in FIGS. 5 and 6) is urged forward by a spring (not shown) so as to be swingable in the front-rear direction.

Above the point / fire extinguishing button 10, a slide type operation knob 20 for operating the heat power increasing / decreasing mechanism 200 is provided.
However, it is provided to be slidable in the left-right direction. As for the slide position of the slide type operation knob 20, in FIG. 5 and FIG. 6, the right end is weak heat power, the middle is medium heat power, and the left end is high heat power.

As shown in FIGS. 1 to 3, a point / fire extinguishing mechanism 10 is provided.
Reference numeral 0 denotes a gas flow passage 11 for fuel gas, which is provided with a safety valve S and a main valve M, both of which are open / close valves, and a tubular valve body 1 horizontally arranged in the front-rear direction. Equipped with. On the upper surface of the front part (left part in the figure) of the valve body 1, a thermal power control valve body 2B provided with a thermal power control mechanism 200 is vertically fastened. The thermal power control valve body 2B has a tubular shape, and a thermal power control valve 2 for adjusting the gas flow rate to increase or decrease the thermal power of the burner B is provided at the upper end of the inner cavity. A switch mechanism 3 operated by a point / fire extinguishing button 10 is fastened to the front end surface of the valve body 1.

An operating lever 4 for adjusting the thermal power of the burner B by increasing or decreasing the valve opening of the thermal power control valve 2 is attached to the upper end of the thermal power control valve body 2B so as to be rotatable in the left-right direction. In this embodiment, the operation lever 4 is rotatably supported by a fulcrum 42 on an upper wall surface of a bottomless box-shaped bracket 41 fastened to the upper end surface of the thermal power control valve body 2B. The slide type operation knob 20 is fixed to the front end portion of the operation lever 4 so that the heating power of the burner B can be adjusted by a sliding operation in the lateral direction.

The switch mechanism 3 is fastened to the front end surface of the valve body 1 with a screw, and has a guide frame 31 forming a guide surface having a cross-shaped cross section, and a switch body fitted in the guide frame 31 so as to be movable back and forth. And 32. The switch main body 32 has a substantially cruciform front shape, and includes a rod-shaped base portion 33, a wing-shaped lever action portion 34 protruding upward from the rod-shaped base portion 33, and a micro protrusion protruding in the left-right direction from the rod-shaped base portion 33. It has a switch actuating portion 35.

At the rear end of the lower part of the switch mechanism 3, the switch body 32 is operated by operating the switch mechanism 3 from the fire extinguishing position.
To the ignition position, the switch body 32 is returned to the intermediate combustion position by stopping the operation, and the switch body 32 is returned from the intermediate combustion position to the original extinction position by performing the operation again. A push / push mechanism 30, which is a position setting mechanism for performing the operation, is installed.

The push / push mechanism 30 has a cam plate 3B extending rearward from the lower end of the rod-shaped base 33 and having a modified heart cam groove 3A shown in FIGS. 4A and 4B on the lower surface. In the guide frame 31, a cylindrical portion 3C having a rectangular cross section extending rearward from the lower rear end is extended, and the cam plate 3B is slidably fitted therein. A locking rod 3D that slides in the cam groove 3A of the cam plate 3B is rotatably attached to the rear end of the cylindrical portion 3C.

The locking rod 3D is a rear end portion 3E of the locking rod 3D.
Is supported by the metal wire wheel 3F on the rear end 3G of the tubular portion 3C, the front end 3H is bent into a hook shape, and is inserted into the deformed heart cam groove 3A from the lateral gap 3I formed on the lower surface of the tubular portion 3C. In the modified heart cam groove 3A, the front end 3H of the locking rod 3D is responsive to ignition and extinguishing operations of the switch mechanism 3 as shown in FIG.
(C) as indicated by an arrow (C), and is set at each of a fire extinguishing position A1, an ignition position A2, and a combustion position A3.

The switch body 32 is biased forward (to the left in the drawing) by a spring 37 interposed between the switch body 32 and the guide frame 31. A micro switch (not shown) is attached to the left side surface of the guide frame 31, and opens and closes in accordance with the displacement of the micro switch operating portion 35. When the switch body 32 is pushed in from the protruding position (fire extinguishing position) shown in FIG. 3, it reaches the pushing position (ignition position) shown in FIG.

When the push is released in this state, the push / push mechanism 30 by the deformed heart cam groove 3A shown in FIG. 4 locks it at the intermediate position (combustion position) shown in FIG. 2 and pushes it again from the intermediate position. Return to the original protruding position (fire extinguishing position) shown in. That is, in this embodiment, the switch mechanism 3 is configured by the push / push mechanism 30.
The switch main body 32 is held at a predetermined position, and an operating member for opening and closing the main valve M, which is an on-off valve, is interlocked with the switch main body 32.

The push / push mechanism 30 may have a heart cam groove instead of the modified heart cam groove 3A, and the position setting mechanism moves the switch body 32 to the ignition position by a configuration other than the push / push mechanism 30. The switch main body 32 may be returned to the intermediate combustion position by stopping the operation, and the switch main body 32 may be returned to the original extinguishing position from the intermediate combustion position by performing the operation again.

An electromagnet 12 of the safety valve S is fitted in a rear portion (right portion in the drawing) of the shaft hole of the valve body 1 to form a gas flow passage 11 for fuel gas. An inflow port 13 that opens downward is provided at the rear part (right part in the figure) of the valve body 1, and an outflow port 14 that opens upward and communicates with the thermal power control valve body 2B is formed at the front part. In the gas flow path 11, the tip end is in contact with the tip end (right end in the figure) of the rod-shaped base portion 33 of the switch body 32 and operates the valve elements of the safety valve S and the main valve M in conjunction with the operation of the switch mechanism 3. 5 is inserted so as to be reciprocally movable in the front-rear direction. The actuation rod 5 is biased in the forward direction by the spring 51 and reciprocates in the front-rear direction in conjunction with the switch body 32.

The portion of the gas flow passage 11 where the outlet 14 is provided is formed to have a small diameter through the throttle portion 15, and the main valve opening 1
6 and is fitted onto the actuating rod 5 so that the spring 5
1 together with the collar-shaped main valve body 52 on which the main valve M is installed.
Is formed. Between the main valve M and the inlet 13,
A throttle wall 54 is formed and serves as a safety valve opening 55 of the safety valve S. At the rear of the actuation rod 5, the collar-shaped safety valve element 5 of the safety valve S
6 is externally fitted together with the safety valve spring, and closes the safety valve port 55 when the operating rod 5 is located on the front side (left side in the drawing).

The inner space of the heat regulation valve body 2B is the gas passage 2
The valve body 22 of the thermal power regulating valve 2 is slidably fitted into the upper end of the gas passage 21. Disc 22
The valve hole is connected to a gas outlet 24 for supplying fuel gas to the stove burner B. The upper end portion of the valve body 22 is exposed at the upper portion of the thermal power control valve body 2B, and the needle pin 23 for rotating the valve body 22 is attached to the exposed portion in the orthogonal direction.

The needle pin 23 is used for the heat regulation valve body 2
An inclined slit 4 which extends laterally from the upper end of B and is provided on the right side wall of the box-shaped bracket 41 and acts as a cam groove.
It projects to the outside through 0. The inclined slit 40 is
The amount of rotation of the needle pin 23 is converted into the amount of axial movement of the valve element 22 to increase or decrease the valve opening degree of the thermal power control valve 2. When the needle pin 23 is set to the upper end (front end), the valve opening of the thermal power control valve 2 becomes maximum and the thermal power of the burner B becomes maximum. When the needle pin 23 is set to the lower end (front end), the valve opening of the thermal power control valve 2 becomes the minimum and the thermal power of the burner B becomes the weakest.

In the present embodiment, the ignition power adjusting mechanism 300 has a resistance increasing means 17 including a collar portion 57 and the throttle portion 15 formed in the middle of the operating rod 5, and a push / push mechanism 30. When the operating lever 4 is set to a high heat power, the heat power of the burner B at the time of ignition is maintained at a medium heat power. That is, when the switch body 32 is pushed in, the operating rod 5 is set to the rearmost portion shown in FIG.
The collar-shaped portion 57 and the narrowed portion 15 are close to each other, and the gas flow path 11 is narrowed to a half open state.

As a result, the flow rate of the fuel gas is reduced and the burner B is prevented from being ignited by a large thermal power and burned by a medium thermal power. When the pressing operation of the switch main body 32 is released, as shown in FIG. 2, the operating rod 5 returns to the intermediate combustion position, and the collar-shaped portion 57 and the throttle portion 15 are separated from each other, so that the resistance of the gas flow passage 11 is increased. Absent. The throttle portion 15 may be formed in the shaft hole separately from the main valve opening 16 of the main valve M, and the resistance increasing means 17 of the gas flow passage 11 is formed in the throttle wall 54 of the safety valve S and the operating rod 5. It may be configured with a large diameter portion (not shown).

On the right side of the heat control valve body 2B, when the operating lever 4 is set to the low heat, the switch mechanism 3 is provided.
A return lever 6 for forcibly returning the operation lever 4 to the medium heat power in conjunction with the operation of is attached rotatably around a fulcrum 61. The return lever 6 is formed with a force point inclined surface 62 that comes into contact with the lever acting portion 34 at the lower end, and an action slit 63 engaged with the needle pin 23 and an action arm 64 for driving the operating lever are provided at the upper end. ing.

The operating lever 4 includes a lever base plate 43 rotatably supported by a fulcrum 42 on the upper wall surface of the bracket 41, and a front side extension part 45 extending forward from the lever base plate 43 through a step 44. The connected lever body 7,
The spring joint 8 is provided between the lever base plate 43 and the lever main body 7.

On the left side of the fulcrum 42 of the lever substrate 43,
The fork-shaped portion 46 (shown in FIG. 5) is formed with a notch groove that meshes with the working arm 64, and is engaged with the tip of the needle pin 23. Inverted L-shaped claws 47, 47 project downward from the front end of the front extension portion 45, and the lever body 7 is attached thereto. The lever main body 7 is formed by pressing a sheet metal, and includes a narrow end locking portion 71, a wide intermediate portion 72, and a narrow front end portion 73.

A stepped notch is formed in the front wall of the bracket 41, and the tip locking portion 71 of the lever body is inserted therein. The spring joint 8 lifts the slide type operation knob 20 (see FIG. 5) to move the lever main body 1
Only when it is tilted about 0 degrees, the tip locking portion 71 is disengaged from the step engagement, and the operation lever 4 can be slid from the medium heat position to the weak heat position.

When the operating lever 4 is set to the right side strong heat position or the left side weak heat position in FIG. 6, the needle pin 23 is maintained at the upper end position (see FIG. 1) or the lower end position. The thermal power control valve 2 has a large opening or a small opening. Further, when the switch mechanism 3 is not operated, the safety valve S and the main valve M are closed as shown in FIG.

Next, the operation of the combustion adjusting device for the gas equipment will be described. At the time of ignition, as shown in FIG. 1, when the operating lever 4 is set to the high-power position and the needle pin 23 is located at the upper position, when the point / fire button 10 is pressed, the switch body 32 is pressed. At this time,
As shown in, the rod-shaped base portion 33 pushes the actuation rod 5 to open the main valve M and the safety valve S, and the microswitch actuation portion 35 turns on the microswitch to generate spark discharge at the sparker P attached to the burner B.

As a result, the gap between the collar-shaped portion 57 and the throttle portion 15 is narrowed, the gas flow rate is limited, and the thermal power of the burner B is automatically set to the thermal power at the intermediate thermal power position suitable for ignition at the time of ignition. Ignition is done safely. Ignited burner B
The electromagnet 12 of the safety valve S is magnetized by the electromotive force of the thermocouple N (see FIG. 1) attached to the burner B by the flame of No. 1, the safety valve S and the main valve M are maintained in the open state, and the combustion continues. The push / push mechanism 30 moves from the solid line extinguishing position shown in FIG. 4A to the two-dot chain line ignition position.

Stop pushing the point / fire extinguishing button 10,
When opened, the switch body 32 returns to the front and pushes
It is held at the intermediate position shown in FIG. 4B by the push mechanism 30, and the gap between the collar-shaped portion 57 and the throttle portion 15 widens,
The effect of limiting the gas flow rate is lost. When the point / fire extinguishing button 10 is pressed during combustion, the push / push mechanism 30 is released, and the switch body 32 returns to the value before ignition as shown in FIG. As a result, the main valve M and the safety valve S are closed, and the combustion of the burner B is stopped.

When the operating lever 4 is set to the low heat position and the needle pin 23 is positioned at the lower position during ignition, when the point / fire button 10 is pushed, the switch body 32 is pushed in and the return lever is pushed. 6 is driven counterclockwise. As a result, the needle pin 23 is moved upward, and the operating lever 4 is moved toward the high heat position. Also in this case, the resistance increasing means 17 automatically sets the thermal power of the burner B to the thermal power of the medium thermal power position suitable for ignition, and the ignition is performed safely.

The actuating member for opening and closing the on-off valve may be other than the actuating rod, and the resistance increasing means 17 of the gas passage 11 for the fuel gas changes the gas flow rate when the point / fire extinguishing mechanism is operated. Any mechanism that can be squeezed can be adopted.

FIG. 7 shows another embodiment. In this embodiment, a rotating point / fire extinguishing mechanism 400 is adopted instead of the pressing type point / fire extinguishing mechanism 100. Point / fire extinguishing mechanism 40
0 is a dial-like knob on the front end 9A with a chamfer (not shown)
Is attached, and a rotary shaft 91 having a slit 9B formed at the rear end is provided. Between the front end of the actuation rod 5 and the rear end of the rotary shaft 91, a pin 92 that engages with the slit 9B is provided at the front end, and a connecting cylinder 93 with the front end of the actuation rod 5 is provided at the rear end. A movement direction changing mechanism 95 with a cylindrical cam 94 is provided.

The rotary type point / fire extinguishing mechanism 400 operates as follows. Before the ignition operation, as shown in FIG. 7A, the operating rod 5 is set to the front side (left side in the drawing). When the knob is turned to turn the turning shaft 91 for ignition, the cylindrical cam 94 pushes the connecting cylinder 93 to the right in the drawing, and the actuating rod 5 is displaced to the right in the drawing via the spring 96. Then, the collar-shaped safety valve body 56 of the safety valve S is moved toward the electromagnet 12.

The collar portion 57 of the actuating rod and the inner peripheral wall 18 of the gas flow passage 11 constitute the resistance increasing means 17 of the present invention, and narrow the gas flow passage 11. When the gas flow rate is limited and the ignition is performed, the thermal power of the burner B is automatically set to the thermal power of the intermediate thermal power position suitable for ignition, and the ignition is safely performed. When ignition is performed in this state and the ignition operation is completed, the operating rod 5 returns to the position before the ignition operation, and the collar portion 57 is set in front of the gas outlet 14 as shown in FIG. 7C. Therefore, it does not have the effect of increasing the resistance of the gas flow path 11.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a combustion adjusting device for gas equipment.

FIG. 2 is a cross-sectional view of a combustion adjusting device for gas equipment.

FIG. 3 is a cross-sectional view of a combustion adjusting device for gas equipment.

FIG. 4 is a bottom view of the push-push mechanism.

FIG. 5 is a perspective view of a combustion adjusting device for a gas appliance.

FIG. 6 is a perspective view of a table stove.

FIG. 7 is a sectional view of a combustion adjusting device for a gas appliance according to another embodiment.

[Explanation of symbols]

 1 Valve Body 2 Thermal Power Control Valve 3 Switch Mechanism 4 Operating Lever 5 Operating Rod (Operating Member) 6 Return Lever 11 Gas Flow Path 15 Throttling Part 17 Resistance Increasing Means 23 Needle Pin 30 Push / Push Mechanism (Position Setting Mechanism) 31 Guide Frame 32 Switch body 57 Collar portion 100 points / fire extinguishing mechanism 200 Fire power increase / decrease mechanism 300 Fire power adjusting mechanism B Hob burner M Main valve (open / close valve) S Safety valve (open / close valve) A1 Fire extinguishing position A2 Ignition position A3 Combustion position

Claims (6)

[Claims] 1. A burner capable of adjusting a heat power from a low heat power to a high heat power, a point / fire extinguishing mechanism for igniting or extinguishing the burner, and a gas passage for supplying a fuel gas to the burner. Opening and closing valve, an operating member that is provided in the gas flow path, and that opens and closes the opening and closing valve in conjunction with the operation of the point / fire extinguishing mechanism, and sets the operating member to the ignition position during ignition operation. However, after the ignition operation is completed, the operating member is displaced to the combustion position, and at the time of the fire extinguishing operation, the operating member is returned to the fire extinguishing position. The operating member comprises resistance increasing means for increasing the flow resistance of the gas flow path only when set to the ignition position,
A thermal power adjustment mechanism at the time of ignition, characterized in that the flow rate of the fuel gas at the time of ignition is limited to a flow rate at which the thermal power of the burner becomes a medium thermal power. 2. The fire extinguishing mechanism according to claim 1, which is a switch mechanism that reciprocates by a manual operation, and the operating member is inserted into a valve body provided with the gas flow path and the on-off valve. A fire power adjusting mechanism at the time of ignition of a gas appliance, characterized in that it is an operating rod that is interlocked with the switch mechanism. 3. The switch mechanism according to claim 2, wherein the switch mechanism includes a guide frame and a switch main body fitted in the guide frame so as to be movable back and forth, and the resistance increasing means interlocks with the switch main body. A collar-shaped part provided on the operating rod,
A thermal power adjustment mechanism at the time of ignition of a gas device, comprising a throttle portion provided inside the valve body. 4. The position setting mechanism according to claim 1, wherein the position setting mechanism moves the operating member forward to an ignition position by operating a fire extinguishing position of the point / fire extinguishing mechanism, and stops the operation of the operating member by an intermediate combustion. A fire power adjustment at the time of ignition of a gas appliance, which is a push-push mechanism for returning the operating member from the intermediate combustion position to the original extinction position by returning to the position and performing the operation again. mechanism. 5. The ignition of a gas device according to claim 4, wherein the point / fire extinguishing mechanism is a switch mechanism that reciprocates by a manual operation, and the push / push mechanism is provided in the switch mechanism. Time fire power adjustment mechanism. 6. A gas appliance equipped with a thermal power adjustment mechanism at the time of ignition according to claim 1.