JP2017138036A - Gas cooker ignition device and gas cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a notch mechanism that prevents fire power from being throttled excessively by a low-cost configuration with reduced number of components.SOLUTION: In an ignition device 4 for a table cooking stove, the notch mechanism includes: a notch plate 30 integrally rotatable with an ignition operation shaft 17 and longitudinally movable in an axial direction of the ignition operation shaft 17; an elastic member (coil spring 31) for pressing the notch plate 30 on a side of a frame 7; a locking projection 32 provided in the notch plate 30; and a cut out 33 provided in the frame 7, to which the locking projection 32 is locked in a rotational position in front of an extinguishment position.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an ignition device used in a gas cooker such as a stove or a grill that burns and burns a burner, and a gas cooker including the ignition device.

As disclosed in Patent Document 1, an ignition device for a gas cooker includes an ignition operation shaft for forcibly opening a magnet electromagnetic valve provided in a gas supply path by a pushing operation to the apparatus main body, and after burner ignition Of a gas supply passage by adjusting the rotation of the ignition operation shaft, an ignition switch that is turned on and off in conjunction with the operation of the ignition operation shaft, and a magnet that is turned on by the ignition switch A configuration is known that includes a controller that energizes the solenoid valve and stops energization of the magnet solenoid valve by turning off the ignition switch.
In other words, when the ignition operation is performed, the ignition knob provided on the ignition operation shaft is pushed in to open the magnet solenoid valve, and the ignition knob is rotated as it is. Gas is supplied to the burner, and a cam provided on the ignition operation shaft turns on the ignition switch. Then, the controller operates the igniter to ignite the burner, and energizes the magnet electromagnetic valve to hold it open. On the other hand, at the time of fire extinguishing operation, when the ignition knob is rotated to the fire extinguishing side, the cam turns off the ignition switch. Therefore, the controller stops energization of the magnet solenoid valve, closes the valve, and shuts off the gas supply.

JP 2007-327705 A

  In such a rotary cock ignition device, the adjustment of the thermal power after ignition is performed by rotating the ignition knob and rotating the closing member via the ignition operation shaft to change the flow area of the gas supply path. Although it is possible, when reducing the thermal power, there is a risk of accidentally extinguishing the fire by turning the ignition knob too far to the fire extinguishing side. In order to prevent such excessive throttling of the thermal power, a notch mechanism for generating a click action at a rotational position before the fire extinguishing position of the ignition knob is provided, but this notch mechanism is provided on the frame side holding the ignition device. A click member such as a pin and an elastic member such as a leaf spring that urges the click member are provided, and a notch plate that elastically locks the click member at the front rotation position is provided on the ignition operation shaft side. This increases the number of parts, leading to an increase in cost.

  Therefore, the present invention provides an ignition device for a gas cooker that can be provided with a notch mechanism that prevents over-throttling of thermal power in a low-cost configuration with a small number of parts, and a gas cooker including the ignition device. Is intended to provide.

In order to achieve the above-mentioned object, the invention according to claim 1 includes a device main body provided with a gas flow path and a frame for fixing in the gas cooker, and a pushing operation into the device main body. An ignition operation shaft that forcibly opens the magnet solenoid valve provided in the gas flow path, a closing member that can adjust the opening of the gas flow path by rotating the ignition operation shaft, and an ignition operation that corresponds to the fire-extinguishing position An ignition device for a gas cooker, comprising: a notch mechanism for generating a click action in the rotation operation of the ignition operation shaft at a rotation position before the rotation position of the shaft;
A notch mechanism is provided on either the notch plate or the frame, a notch plate that can rotate integrally with the ignition operation shaft and can move back and forth in the axial direction of the ignition operation shaft, an elastic member that presses the notch plate toward the frame side And a locked portion that is provided on the other side and locked by the locking portion at the front rotation position.
According to a second aspect of the present invention, in the configuration of the first aspect, the notch plate is provided on the front side in the pushing direction of the ignition operation shaft with respect to the frame, and the ignition operation shaft is connected to the notch plate during the pushing operation. An engagement portion is provided that engages and separates the notch plate from the frame against the bias of the elastic member.
In order to achieve the above object, a third aspect of the present invention is a gas cooker, wherein the fuel gas supply path to the burner is provided with the ignition device according to the first or second aspect. It is characterized by.

According to the first and third aspects of the present invention, the notch mechanism for preventing the thermal power from being excessively throttled is provided with a notch plate provided with a locking part or a locked part, an elastic member, and a hook provided on the frame. It can be formed with a stop or a locking part. That is, since the members related to the notch mechanism are the two members of the notch plate and the elastic member, the notch mechanism can be provided with a low-cost configuration with a small number of parts.
According to the second aspect of the invention, in addition to the effect of the first aspect, the notch plate does not interfere with the pushing operation at the time of ignition, and an extra click action does not occur.

It is explanatory drawing of a table stove. It is explanatory drawing of the ignition device of a fire extinguishing position, (A) shows a side surface, (B) shows a front, respectively. It is a longitudinal cross-sectional view of the ignition device of a fire extinguishing position. It is explanatory drawing of the state which pushed in the ignition knob from the fire extinguishing position, (A) shows a partial cross section, (B) shows the front, respectively. It is explanatory drawing of the state which rotated the ignition knob to the ignition position, (A) shows a partial cross section, (B) shows the front, respectively. It is explanatory drawing of the state which cancelled | released pushing of the ignition knob in the ignition position, (A) shows a partial cross section, (B) shows the front, respectively. It is explanatory drawing of the state which rotated the ignition knob to the low heat position, (A) shows a partial cross section, (B) shows the front, respectively.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory diagram showing an example of a table stove as a gas cooker. This table stove 1 has a stove portion (not shown) having a stove burner in a container body 2 having a front panel 3, on the upstream side of a gas supply path to the gas burner, and behind the front panel 3 in the container body 2. An ignition device 4 to be installed and a controller 5 for controlling the burner by operating the ignition device 4 are provided. The controller 5 is operated by obtaining power from a dry battery (not shown). The controller 5 is electrically connected to a magnet solenoid valve 12, an ignition switch 34, and an igniter switch 37, which will be described later, provided in the ignition device 4, respectively. At the same time, an igniter 6 for ignition discharge, a thermocouple for flame detection, a thermistor for overheat detection (both not shown), and the like are also electrically connected.

  As shown in FIGS. 2 and 3, the ignition device 4 has a cylindrical device body 8 to which a front end (a right side in FIG. 1 is a front side) is fixed in a container 2 via a frame 7. The apparatus main body 8 has a gas inlet 9 connected to a gas pipe (not shown) on the upstream side and supplied with fuel gas, and a gas outlet provided on the downstream side and connected to a gas flow path to the burner side. 10 is formed, and a gas flow path 11 in which the gas inlet 9 and the gas outlet 10 communicate with each other is formed in the apparatus main body 8. A magnet electromagnetic valve 12 having a valve body 13 that opens and closes the gas flow path 11 at the gas inlet 9 is disposed at the rear end of the apparatus body 8.

  Further, in the gas flow path 11, there are a tapered cylindrical closure 14 that adjusts the opening degree of the gas flow path 11 at the gas outlet 10, and a spindle 15 that engages with the closure 14 and rotates integrally. Is provided. A cylindrical holder 16 is fixed to the frame 7 at the front part in the apparatus main body 8 coaxially with the spindle 15, and an ignition operation shaft 17 having a two-plane width in the holder 16 is provided in the axial direction. The rear end through which the holder 16 passes is connected coaxially with the spindle 15. The ignition operation shaft 17 is urged to the forward movement position together with the spindle 15 by a coil spring 19 provided in a fitting hole 18 formed in the front portion of the closing member 14, and in this forward movement position, the magnet electromagnetic valve 12 is The gas passage 11 is closed by the valve body 13 that is projected and biased. When the ignition operation shaft 17 is pushed backward, the retracted spindle 15 pushes the valve element 13 of the magnet electromagnetic valve 12 to forcibly open the valve. The rear end of the ignition operation shaft 17 is fitted into the fitting hole 18 at the retracted position, and is integrated with the closing member 14 in the rotation direction.

As shown in FIG. 2 (B), a fan-shaped cam portion 21 is provided on the ignition operation shaft 17 in front of the frame 7 so as to project perpendicularly to the lower right side of the ignition operation shaft 17 when viewed from the front. An interlocking plate 20 having a plate-like arm 22 projecting orthogonally on the left side of the ignition operation shaft 17 includes a stop pin 23 provided orthogonally to the ignition operation shaft 17 on the rear side and an E-ring provided on the front side. 24 so as to be integrally rotatable. A pressing piece 25 protrudes obliquely rearward from the upper end of the arm 22.
In addition, a coil spring 28 is externally mounted on the ignition operation shaft 17 between a front spring receiving portion 26 protruding from the rear surface of the interlocking plate 20 and a rear spring receiving portion 27 attached to the front surface of the frame 7. The ignition operation shaft 17 is urged forward. However, the ignition operation shaft 17 is provided with an engagement pin 29 as an engagement portion behind the rear spring receiver 27, and the ignition operation shaft 17 has an engagement pin 29 connected to the rear spring receiver 27. Advancement is restricted at the abutting position. This advance position corresponds to the advance position of the spindle 15. The front end of the coil spring 28 is locked to the arm 22, and the rear end is locked to the front surface of the frame 7 to urge the ignition operation shaft 17 to rotate clockwise in FIG.

  Further, a notch plate 30 is externally mounted on the ignition operation shaft 17 in the holder 16 so as to be integrally rotatable and movable back and forth in the axial direction, and the notch plate 30 advances forward in contact with the frame 7 by a coil spring 31 as an elastic member. The notch mechanism is configured by being biased to the position. At an eccentric position near the outer periphery on the front surface of the notch plate 30, a circular locking protrusion 32 that is rounded on the outer periphery of the front end is projected forward as a locking portion. At the inner edge of the through hole 7a, a notch 33 is formed as a locked portion to which the locking projection 32 is locked at a predetermined rotational position of the notch plate 30. This predetermined rotation position is a rotation position (low fire position) before the fire extinguishing position of the ignition operation shaft 17 described later. However, when the ignition operation shaft 17 is pushed rearward, the integrally retracted engaging pin 29 is engaged with the notch plate 30, and the notch plate 30 is separated to the rear of the frame 7 against the bias of the coil spring 31. It is supposed to let you.

  34 is a micro switch for ignition (hereinafter referred to as “ignition switch”). This ignition switch 34 is the upper left side of the frame 7 when viewed from the front, with the operating piece 35 in the front-rear direction, The operating piece 35 is attached obliquely and vertically so as to interfere with the pressing piece 25 of the arm 22 of the interlocking plate 20 at the fire extinguishing position. Reference numeral 37 denotes an igniter actuating micro switch (hereinafter referred to as an “igniter switch”). However, it is attached vertically so that it may be located in the rear upper side of the cam part 21 of the interlocking plate 20 in a fire extinguishing position.

The point-extinguishing operation of the ignition device 4 in the table stove 1 configured as described above will be described in detail with reference to the explanatory views showing the front and rear positions of the ignition operation shaft 17 and the rotational position of the interlocking plate 20 in FIGS.
First, in the fire extinguishing position of the ignition operation shaft 17, the ignition operation shaft 17 is in the forward position shown in FIGS. 2 and 3, and the cam portion 21 of the interlocking plate 20 is positioned on the lower front side of the contact portion 39 of the igniter switch 37. Then, the pressing piece 25 of the arm 22 contacts the contact portion 36 of the operating piece 35 of the ignition switch 34 to push in the operating piece 35 (at this time, the ignition switch 34 is OFF). Further, the notch plate 30 is pressed against the frame 7 by the coil spring 31, but here the locking projection 32 is not in phase with the notch 33, so the locking projection 32 contacts the rear surface of the frame 7. Yes.

  When the ignition knob 40 provided at the front end of the ignition operation shaft 17 is pushed in from here, the ignition operation shaft 17 moves backward to forcibly open the magnet solenoid valve 12 via the spindle 15 as shown in FIG. At the same time, the pressing piece 25 of the arm 22 of the interlocking plate 20 moved backward from the contact portion 36 of the ignition switch 34 to return the operating piece 35 to the projecting position, and the ignition switch 34 is turned on. Therefore, the controller 5 energizes the magnet solenoid valve 12 to hold it open, and supplies the fuel gas from the gas flow path 11 to the stove burner. At this time, the cam portion 21 of the interlocking plate 20 only approaches the operating piece 38 of the igniter switch 37 and does not push in the operating piece 38. The notch plate 30 is pushed backward against the bias of the coil spring 31 by the engagement pin 29 retracted together with the ignition operation shaft 17 and is separated from the frame 7.

  Next, when the ignition knob 40 is pressed and rotated counterclockwise, as shown in FIG. 5, the interlocking plate 20 rotates counterclockwise integrally with the ignition operation shaft 17, and the interlocking plate 20 rotates counterclockwise by about 90 °. The cam portion 21 contacts the contact portion 39 of the igniter switch 37 and pushes the operating piece 38. Therefore, the controller 5 which has turned on the igniter switch 37 and obtained this ON signal operates the igniter 6 for a predetermined time to ignite the combustor. Since the ON state of the ignition switch 34 does not change, energization of the magnet solenoid valve 12 is maintained. At this time, the notch plate 30 rotates together with the ignition operation shaft 17, but the pushing-in position backward by the engagement pin 29 does not change, so that the locking protrusion 32 does not interfere with the frame 7.

  Here, when the pressing of the ignition knob 40 is released, the ignition operation shaft 17 returns to the forward position by the urging of the coil spring 28 as shown in FIG. At the same time, the interlocking plate 20 moves forward and moves away from the operating piece 38 of the igniter switch 37, so that the igniter switch 37 is turned off and the operation of the igniter 6 is stopped. When the controller 5 confirms ignition of the burner by the electromotive force obtained from the thermocouple, the energization to the magnet solenoid valve 12 is maintained as it is, so that combustion continues even if the pushing of the ignition knob 40 is released. At this time, the gas passage 11 is fully opened by the closing member 14 rotated together with the ignition operation shaft 17 via the spindle 15, so that the stove burner burns with strong fire. The notch plate 30 moves forward by the urging of the coil spring 31 as the engaging pin 29 moves forward. Here, however, the locking projection 32 is not in phase with the notch 33, so that the locking projection 32 is located on the rear surface of the frame 7. Advancement is restricted at the abutting position.

In the case of reducing the thermal power from this high fire position, when the ignition knob 40 is rotated to the right to the fire extinguishing position side, the closing member 14 is throttled, the opening degree of the gas flow path 11 is reduced, and the thermal power of the conoburner is reduced. Then, in the low fire position before the fire extinguishing position, as shown in FIG. 7, when the notch plate 30 rotated together with the ignition operation shaft 17 reaches a phase where the locking projection 32 coincides with the notch 33, the coil spring 31 is attached. The locking projection 32 is locked to the notch 33 by moving forward by the force. Accordingly, a click action occurs here, and the user can stop the rotation operation of the ignition knob 40 at the position, and can prevent the fire extinguishing due to excessive restriction of the thermal power.
In addition, when the burner is misfired, the controller 5 that has monitored the combustion of the burner by the electromotive force of the thermocouple detects this and stops energization of the magnet solenoid valve 12, so that the magnet solenoid valve 12 is closed. Thus, the gas flow path 11 is closed.

  When the ignition knob 40 is rotated clockwise to the fire extinguishing position when extinguishing the burner, the closing member 14 rotated via the ignition operation shaft 17 closes the gas flow path 11 and rotates together with the ignition operation shaft 17. The interlocking plate 20 brings the pressing piece 25 of the arm 22 into contact with the contact portion 36 of the ignition switch 34 and pushes the operating piece 35. Accordingly, the ignition switch 34 is turned OFF, and the controller 5 that detects this turns off the energization of the magnet solenoid valve 12, closes the gas flow path 11, and extinguishes the burner. As the ignition operation shaft 17 is rotated to the fire extinguishing position, the notch plate 30 also resists the bias of the coil spring 31 by causing the locking protrusion 32 having a rounded front end to disengage from the notch 33 without significant resistance. Then it moves backward and rotates to return to the rotational position shown in FIGS.

  As described above, according to the ignition device 4 and the table stove 1 of the above embodiment, the notch mechanism can be rotated integrally with the ignition operation shaft 17 and moved back and forth in the axial direction of the ignition operation shaft 17, and the notch plate. An elastic member (coil spring 31) that presses 30 toward the frame 7 side, a locking projection 32 provided on the notch plate 30, and a locking projection 32 that is provided on the frame 7 and is locked at a rotational position before the fire extinguishing position. Since the notch 33 is configured to include a notch mechanism that prevents overheating of the thermal power, the notch plate 30 provided with the locking projection 32, the coil spring 31, and the notch provided directly on the frame 7 are provided. It can be formed with the notch 33. That is, since the members related to the notch mechanism are the two members of the notch plate 30 and the coil spring 31, the notch mechanism can be provided with a low-cost configuration with a small number of parts.

  In particular, here, the ignition operation shaft 17 is provided with an engagement pin 29 that engages with the notch plate 30 during the pushing operation and separates the notch plate 30 from the frame 7 against the bias of the coil spring 31. In addition, the notch plate 30 does not interfere with the pushing operation at the time of ignition, and no extra click action occurs.

Note that the locking protrusion as the locking portion is not limited to a circular shape, and may be a triangular or trapezoidal protrusion whose both surfaces in the circumferential direction are inclined surfaces. The locked portion can be appropriately changed according to the shape of the locking portion, such as a recess or a through hole instead of a notch.
In the above embodiment, the notch plate is provided with a locking portion, and the frame is provided with a locked portion. Conversely, the locking portion such as a locking projection is provided on the frame, and the notch plate is provided with a notch. Each of the locked portions may be provided.
Further, the elastic member is not limited to the coil spring, and a disc spring, a leaf spring, or the like can be used. The engaging portion can be integrally formed by cutting and raising the ignition operation shaft instead of a separate pin.

On the other hand, the position and shape of the ignition switch and the igniter switch, the shape of the interlocking plate, the structure of the gas flow path of the apparatus main body, etc. are not limited to the above-described embodiments, and can be appropriately changed in design.
The ignition device of the present invention is not limited to a table stove, and can be used in other gas cookers such as a built-in stove and a grill.

  1 .. Table stove, 2 .. Body 4.. Ignition device 5 .. Controller, 7 .. Frame, 7 a .. Through hole, 8 .. Device body, 9. Outlet, 11 ... Gas flow path, 12 ... Magnet solenoid valve, 14 ... Closer, 15 ... Spindle, 17 ... Ignition operating shaft, 19, 28, 31 ... Coil spring, 20 .... Interlocking plate, 21 ..Cam part, 22 ..Arm, 29 ..engagement pin, 30 ..notch plate, 32 ..locking projection, 33 ..notch, 34 ..ignition switch, 37 ..igniter switch, 40・ Ignition knob.

Claims (3)

An apparatus main body with a gas flow path and a frame for fixing in the gas cooker;
An ignition operating shaft for forcibly opening a magnet electromagnetic valve provided in the gas flow path by a pushing operation into the apparatus body;
A closure capable of adjusting the opening of the gas flow path by rotating the ignition operation shaft;
A notch mechanism for generating a click action in the rotation operation of the ignition operation shaft at a rotation position before the rotation position of the ignition operation shaft corresponding to the fire extinguishing position;
A gas cooker ignition device comprising:
The notch mechanism can rotate integrally with the ignition operation shaft and move back and forth in the axial direction of the ignition operation shaft; and
An elastic member that presses the notch plate toward the frame;
A locking portion provided on any one of the notch plate and the frame;
An ignition device for a gas cooker, comprising: a locked portion provided on the other side and locked by the locking portion at the front rotation position.   The notch plate is provided in front of the frame in the pushing direction of the ignition operation shaft, and the ignition operation shaft is engaged with the notch plate during the pushing operation to bias the elastic member. 2. The ignition device for a gas cooker according to claim 1, further comprising an engaging portion that resists the notch plate from the frame.   A gas cooker comprising the ignition device according to claim 1 or 2 in a fuel gas supply path to a burner.

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