JP6116357B2 - Gas burner burner - Google Patents

Description

The present invention provides a plurality of flames in which a burner cap is placed on an annular flame mouth forming portion of a burner body, and a flame is formed radially outwardly between the flame mouth forming portion and the burner cap. The mouth and the ignition flame are formed along the circumferential direction,
The flame opening forming portion is configured to include a projecting portion projecting radially outward from the burner cap,
A spark plug mounting recess that is recessed radially inward is formed at a location corresponding to the ignition flame mouth in the flame mouth forming portion,
A spark plug is provided in a state of entering the spark plug mounting recess and projecting upward from the bottom surface of the spark plug mounting corresponding to the bottom of the spark plug mounting recess,
The present invention relates to a gas stove burner in which an ignition spark target is provided at a location above the spark plug.

  In the gas stove burner, a flame formed at the flame outlet is provided along the outer peripheral portion of the burner main body by providing the flame mouth forming portion with a projecting portion that projects radially outward from the burner cap. The secondary air flowing in the air is suppressed from being blown by the secondary air, so that good combustion can be performed.

  Then, while providing the overhanging portion in the flame port forming portion, a spark plug mounting recess is formed at a location corresponding to the ignition flame port in the flame port forming portion, and the spark plug is mounted in the spark plug mounting recess. By providing it in a state where it enters, the spark plug can be brought close to the ignition flame in the radial direction so that the gas fuel discharged from the ignition flame can be properly ignited. is there.

  In addition, the presence of the spark plug mounting recess prevents the spark plug and the overhanging portion of the flame port forming portion from getting too close to each other. However, the spark plug is prevented from sparking with the overhanging portion of the flame opening forming portion, so that the spark plug can generate an appropriate spark with the ignition spark target.

  As a conventional example of such a gas stove burner, there is one in which a spark plug mounting recess into which a spark plug is inserted is formed in a semicircular shape concentric with the outer diameter of the spark plug (see, for example, Patent Document 1 (FIG. 2)). ).

JP 2011-47626 A

  In conventional gas stove burners, the spark plug mounting recess is formed in a semicircular shape concentric with the outer diameter of the spark plug, so that the ignition plug mounting bottom surface and the spark plug mounting recess ignition It is difficult to clean the inner surface facing the plug, that is, the inner surface of the spark plug mounting recess, and improvement is desired.

  That is, for example, when cooking boiled food in a pan, the simmered overflow from the pan flows into the spark plug mounting recess and adheres to the bottom surface of the spark plug mounting or the inner surface of the spark plug mounting recess. Since the bottom surface for plug attachment and the inner surface of the recess for attaching the spark plug become dirty with use, it is necessary to clean the inner surface of the bottom surface for attaching the spark plug and the recess for attaching the spark plug in a timely manner, such as wiping with cloth. is there.

  As an example of the cleaning mode when wiping the bottom surface for mounting the spark plug or the inner surface of the recess for mounting the spark plug with cloth or the like, for example, the cloth is wound around a thin rod-shaped body such as a toothpick, and the cloth is wrapped thin Insert the rod-like body downward from above into the space between the outer circumferential surface of the spark plug and the inner surface of the spark plug mounting recess, or radially inward from the opening side of the spark plug mounting recess There is a form in which it is inserted toward and wiped off and cleaned.

  However, when the spark plug mounting recess is formed in a semicircular shape concentric with the outer diameter of the spark plug, the gap between the outer peripheral surface of the spark plug and the inner surface of the spark plug mounting recess is narrow. In addition, it is difficult to insert a thin rod-like body wrapped with cloth between the outer peripheral surface of the spark plug and the inner surface of the spark plug mounting recess, and against the inner surface of the spark plug mounting bottom surface or the spark plug mounting recess. It was difficult to clean well.

  In other words, when installing the spark plug in the state where the spark plug is inserted into the recess for mounting the spark plug, it is necessary to bring the spark plug close enough to the ignition flame so that ignition can be performed accurately. In order to be sufficiently close to the back side portion of the inner surface of the plug mounting recess, when the spark plug mounting recess is formed in a semicircular shape concentric with the outer diameter of the spark plug, The gap between the outer peripheral surface of the spark plug and the inner surface of the spark plug mounting recess includes not only the back portion of the inner surface of the spark plug mounting recess but also the opening plug recess. As a result, as described above, it becomes difficult to satisfactorily clean the bottom surface for mounting the spark plug and the inner surface of the recess for mounting the spark plug.

  The present invention has been made in view of the above circumstances, and its purpose is to clean the inner surface of the spark plug mounting bottom surface and the spark plug mounting recess while allowing the spark plug to be appropriately ignited. The object is to provide a gas stove burner that can be performed satisfactorily.

The burner for a gas stove according to the present invention has a burner cap placed on the annular flame opening forming portion of the burner body, and forms a flame outward in the radial direction between the flame opening forming portion and the burner cap. A plurality of flame vents and ignition flame ports are formed along the circumferential direction,
The flame opening forming portion is configured to include a projecting portion projecting radially outward from the burner cap,
A spark plug mounting recess that is recessed radially inward is formed at a location corresponding to the ignition flame mouth in the flame mouth forming portion,
A spark plug is provided in a state of entering the spark plug mounting recess and projecting upward from the bottom surface of the spark plug mounting corresponding to the bottom of the spark plug mounting recess,
An ignition spark target is provided at a location above the spark plug, and the first characteristic configuration thereof is:
The recess for mounting the spark plug has a pair of extensions extending radially outward from each of a back side portion that is spaced from the back portion of the spark plug and both circumferential ends of the back side portion. Formed in a form comprising a protruding portion,
The pair of extending portions are characterized in that the distance in the circumferential direction is increased toward the radially outer side.

  That is, the spark plug mounting recess has a pair of extensions extending radially outward from each of the back portion located at a distance from the back portion of the spark plug and both circumferential ends of the back portion. In order to allow the ignition plug to be sufficiently close to the ignition flame and to perform ignition accurately, the ignition plug is connected to the back of the ignition plug mounting recess. Even if it is arranged in a form that is sufficiently close to the side part, the pair of extending parts are formed in such a form that the distance in the circumferential direction is increased toward the radially outer side, so that the bottom face for mounting the spark plug In addition, it is possible to satisfactorily clean the inner surface of the recess for mounting the spark plug that faces the spark plug.

  In addition, since the pair of extending portions of the spark plug mounting recess is formed in a form in which the distance in the circumferential direction is increased toward the radially outer side, of the inner surface of the spark plug mounting recess, Since the inner surface formed by the pair of extending portions is separated from the outer peripheral surface of the spark plug toward the radially outer side, it is between the inner surface formed by the pair of extending portions and the outer peripheral surface of the spark plug. Can be made wider than the distance between the inner surface of the back side portion of the spark plug mounting recess and the outer peripheral surface of the spark plug.

  Therefore, even if the spark plug is arranged in a form sufficiently close to the back side portion of the spark plug mounting recess, the inner surface of the pair of extending portions of the spark plug mounting recess and the spark plug outer peripheral surface Since the gap between the gaps can be widened, the bottom surface for mounting the spark plug and the inner surface of the spark plug mounting recess can be easily wiped off with cloth, etc. It is possible to satisfactorily clean the inner surface of the recess.

  By the way, when wiping the bottom surface for mounting the spark plug or the inner surface of the recess for mounting the spark plug with cloth, for example, wrap the cloth around a thin rod-shaped body such as a toothpick and ignite the thin rod-shaped body wrapped with the cloth. Insert from above into the space between the outer peripheral surface of the plug and the inner surface of the spark plug mounting recess, or insert radially inward from the opening side of the spark plug mounting recess. In this case, since the gap between the inner surface of the pair of extending portions of the recess for attaching the spark plug and the outer peripheral surface of the spark plug is wide, the operation of inserting the thin rod-like body around which the cloth is wound can be easily performed.

  In addition, although the gap between the inner surface of the back side portion of the spark plug mounting recess and the outer peripheral surface of the spark plug is narrow, for example, a thin rod-like body wrapped with cloth is arranged radially from the opening side of the spark plug mounting recess. While inserting inwardly, ignite the back side portion of the spark plug mounting recess by, for example, inserting it between the inner surface of the back side portion of the spark plug mounting recess and the outer peripheral surface of the spark plug. It becomes easy to clean the corresponding part between the plugs.

  In short, according to the first characteristic configuration of the present invention, while the ignition by the spark plug can be appropriately performed, the inner surface of the spark plug mounting bottom surface and the spark plug mounting recess facing the spark plug is well cleaned. It is possible to provide a gas burner that can be used.

In addition to the first characteristic configuration described above, the second characteristic configuration of the gas stove burner of the present invention includes:
The pair of extending portions are characterized in that an imaginary line connecting their tip portions is formed in a state of being located radially inward of the spark plug in a plan view.

  That is, since the pair of extending portions are formed so that the imaginary line connecting the tip portions thereof in a plan view is positioned radially inward of the spark plug, the spark plug mounting recess Since the distance between the inner surface of the pair of extending portions and the outer peripheral surface of the spark plug can be made sufficiently wide, the work for wiping the bottom surface for mounting the spark plug and the inner surface of the recess for mounting the spark plug with cloth or the like is performed. For example, the inner surface of the spark plug mounting bottom surface and the spark plug mounting recess can be satisfactorily cleaned.

  Further, when cleaning the inner surface of the spark plug mounting bottom surface and the spark plug mounting recess, in a plan view, a state extending in the tangential direction of the flame port forming portion between the spark plug and the inner surface of the spark plug mounting recess In some cases, a cleaning body such as a piece of cloth is inserted and cleaned while reciprocating the cleaning body in the tangential direction of the flame opening forming portion. It becomes easy to clean the corresponding portion between the back portion and the spark plug.

  When cleaning is performed in this form, the cleaning body comes into contact with the spark plug, but in a plan view, the pair of extending portions has a phantom line connecting their tip portions with a diameter larger than that of the spark plug. Since it is formed so as to be positioned inward in the direction, the cleaning body is difficult to apply a large load (force) to the spark plug, and it can be cleaned well while suppressing damage to the spark plug. .

  In short, according to the second characteristic configuration of the present invention, in addition to the operational effects of the first characteristic configuration, cleaning of the inner surface of the spark plug mounting bottom surface and the spark plug mounting recess is performed while suppressing damage to the spark plug. A burner for a gas stove that can be performed more satisfactorily can be provided.

In addition to the first or second characteristic configuration described above, the third characteristic configuration of the gas stove burner of the present invention includes:
The inner surfaces of the pair of extending portions facing the ignition plug are formed in a flat surface shape.

  That is, since the inner surfaces of the pair of extending portions facing the ignition plug, that is, the inner surfaces of the pair of extending portions are formed in a flat surface shape, the inner surfaces of the pair of extending portions are wiped off. It will be possible to satisfactorily clean the inner surface of the protruding portion.

  In other words, when wiping the inner surfaces of the pair of extending portions of the recess for attaching the spark plug with cloth or the like, for example, the cloth is wound around a thin rod-shaped body such as a toothpick, and the thin rod-shaped body wrapped with the cloth is ignited. When inserting and wiping radially inward from the opening side of the plug mounting recess, the inner surfaces of the pair of extending portions are flat, so that the cloth is wound along the flat inner surface. By moving the thin rod-shaped body, the inner surfaces of the pair of extending portions can be cleaned well.

  In short, according to the third characteristic configuration of the present invention, in addition to the operational effects of the first or second characteristic configuration, it is possible to provide a gas stove burner that can satisfactorily clean the inner surfaces of the pair of extending portions.

In addition to any of the first to third feature configurations described above, the fourth feature configuration of the gas stove burner according to the present invention includes:
The spark plug mounting bottom surface is characterized in that it is formed in an inclined shape that is lower on the radially outer side.

  In other words, since the bottom surface for mounting the spark plug is formed in an inclined shape that is lower on the radially outer side, when filth such as boiled juice falls to the bottom surface for mounting the spark plug, the soil becomes the diameter of the bottom surface for mounting the spark plug. Will flow outward in the direction.

  As described above, since the filth falling on the bottom surface for mounting the spark plug flows to the radially outer side of the bottom surface for mounting the spark plug, it is possible to suppress the accumulation of filth on the top surface of the bottom surface for mounting the spark plug. Therefore, it is possible to simplify the cleaning operation for the bottom surface for mounting the spark plug.

  Incidentally, since the spark plug is provided on the bottom surface of the spark plug so as to protrude upward, when cleaning the filth deposited on the top of the bottom surface of the spark plug, The dirt accumulated at the corner portion with the outer peripheral surface of the plug is also removed, but the cleaning operation of the corner portion is troublesome and troublesome.

  According to the third characteristic configuration, the filth falling on the spark plug mounting bottom surface flows radially outward of the spark plug mounting bottom surface, so that the spark plug mounting bottom surface and the spark plug outer peripheral surface Since it is possible to suppress the accumulation of filth at the corner portion of this, it is possible to simplify the cleaning operation for the bottom surface for mounting the spark plug.

  In short, according to the fourth feature configuration of the present invention, in addition to the operational effects of any of the first to third feature configurations, a gas stove burner that can simplify the cleaning operation for the bottom surface for mounting the spark plug. Can provide.

In addition to the fourth characteristic configuration described above, the fifth characteristic configuration of the gas stove burner of the present invention includes:
The bottom surface for mounting the spark plug is formed in an inclined shape that is lower in the radially outer side and lower in the circumferential direction as the distance from the portion where the spark plug is located.

  In other words, since the bottom surface for mounting the spark plug is formed in an inclined shape such that the outer side in the radial direction is lower, and the lower the distance from the portion where the spark plug is located in the circumferential direction, dirt such as boiled juice is mounted on the spark plug. When falling to the bottom surface, the dirt flows to the side away from the portion where the spark plug is located in the circumferential direction in addition to flowing radially outward of the bottom surface for mounting the spark plug.

  Therefore, it is possible to suppress the accumulation of filth on the top of the bottom surface for mounting the spark plug, and moreover, it is possible to appropriately suppress the accumulation of filth at the corner portion between the bottom surface for mounting the spark plug and the outer peripheral surface of the spark plug. It is possible to further simplify the cleaning operation for the bottom surface for mounting the spark plug.

  In short, according to the fifth characteristic configuration of the present invention, in addition to the operational effects of the fourth characteristic configuration, it is possible to provide a gas stove burner capable of further simplifying the cleaning operation for the bottom surface for mounting the spark plug.

The sixth feature configuration of the gas stove burner of the present invention is in addition to any of the first to fifth feature configurations described above,
An ignition sensor mounting recess that is recessed inward in the radial direction is formed at a location corresponding to the ignition detection flame mouth of the flame mouth in the flame mouth forming portion,
An ignition sensor that detects that a flame has been formed in the ignition detection flame opening is inserted into the ignition sensor mounting recess and from the bottom of the ignition sensor mounting corresponding to the bottom of the ignition sensor mounting recess. Provided in a state of projecting upward,
The bottom surface for mounting the ignition sensor is characterized in that it is formed in an inclined shape that is lower on the radially outer side.

  That is, an ignition sensor mounting recess that is recessed inward in the radial direction is formed at a location corresponding to the ignition detection flame mouth in the flame mouth forming portion, and the ignition detection flame mouth is formed. Since the ignition sensor for detecting the formation of the flame is provided in a state where the ignition sensor is inserted into the recess for mounting the ignition sensor, the ignition sensor is operated while avoiding the thermal influence from the projecting portion of the flame opening forming portion. It is possible to accurately detect the flame formed in the ignition detection flame mouth by arranging it close to the ignition detection flame mouth.

  In addition, since the bottom surface for mounting the ignition sensor provided in a state where the ignition sensor protrudes upward is formed in an inclined shape that is lower on the radially outer side, filth such as boiled juice is the bottom surface for mounting the ignition sensor. When falling, the filth flows to the radially outward side of the bottom surface for mounting the ignition sensor.

  In this way, since the filth falling on the bottom surface for mounting the ignition sensor flows to the radially outward side of the bottom surface for mounting the ignition sensor, it is possible to suppress the accumulation of filth on the top surface of the bottom surface for mounting the ignition sensor. Therefore, it is possible to simplify the cleaning operation for the bottom surface for mounting the ignition sensor.

  By the way, the bottom surface for mounting the ignition sensor is provided with the ignition sensor protruding upward, so when cleaning the filth deposited on the bottom surface for mounting the ignition sensor, the bottom surface for mounting the ignition sensor The dirt accumulated at the corner portion with the outer peripheral surface of the sensor is also removed, but the cleaning operation of the corner portion is troublesome and cumbersome.

  According to the sixth characteristic configuration, the filth that has fallen on the bottom surface for mounting the ignition sensor flows outward in the radial direction of the bottom surface for mounting the ignition sensor. Therefore, the bottom surface for mounting the ignition sensor, the outer peripheral surface of the spark plug, Since it is possible to suppress the accumulation of filth at the corner portion of this, it is possible to simplify the cleaning operation for the bottom surface for mounting the ignition sensor.

  In short, according to the sixth characteristic configuration of the present invention, in addition to the operational effects of any of the first to fifth characteristic configurations, the flame formed in the ignition detection flame outlet is accurately detected by the ignition sensor. In addition, it is possible to provide a gas stove burner that can simplify the cleaning operation for the bottom surface for mounting the ignition sensor.

In addition to the sixth characteristic configuration described above, the seventh characteristic configuration of the gas stove burner of the present invention includes:
The bottom surface for mounting the ignition sensor is formed in an inclined shape that is lower in the radially outer side and lower in the circumferential direction as the distance from the portion where the ignition sensor is located.

  That is, since the bottom surface for mounting the ignition sensor is formed in an inclined shape that is lower on the outer side in the radial direction and lower on the distance from the portion where the ignition sensor is located in the circumferential direction, dirt such as boiled juice is mounted on the ignition sensor. When falling to the bottom surface, the filth flows to the radially outward side of the bottom surface for mounting the ignition sensor, and also flows to the side away from the portion where the ignition sensor is located in the circumferential direction.

  Therefore, it is possible to suppress the accumulation of dirt on the upper part of the bottom surface for mounting the ignition sensor, and furthermore, it is possible to appropriately suppress the accumulation of dirt on the corner portion between the bottom surface for mounting the ignition sensor and the outer peripheral surface of the ignition sensor. It is possible to further simplify the cleaning operation for the bottom surface for mounting the ignition sensor.

  In short, according to the seventh characteristic configuration of the present invention, it is possible to provide a gas stove burner capable of further simplifying the cleaning operation for the bottom surface for mounting the ignition sensor, in addition to the operational effects of the sixth characteristic configuration.

Side view of gas burner burner Partially cutaway plan view of burner for gas stove Perspective view of burner for gas stove Perspective view of gas burner burner with burner cap removed Perspective view of a gas stove burner with the burner cap juice tray removed Perspective view showing the lower surface of the burner cap Front view showing spark plug mounting part Top view of spark plug mounting part Side view of spark plug attachment Side view of ignition sensor mounting part Perspective view of mounting part of ignition sensor

Embodiment
Embodiments of the present invention will be described with reference to the drawings.
(Configuration of gas burner burner)
As shown in FIGS. 1 to 3, the gas stove burner B includes a burner body 1 and a burner cap 2, and includes a built-in stove incorporated in a system kitchen, a stove stove mounted on a stove stand, and the like. It will be equipped with various gas stoves.
In FIG. 1, the top plate 3 and the five virtues 4 mounted on the gas stove are schematically shown by a two-dot chain line, but the arrangement configuration of the gas stove burner B with respect to the top plate 3 and the specific configuration of the five virtues 4 are limited to the illustrated configuration. It is not something.

In the present embodiment, the burner body 1 and the burner cap 2 are made of aluminum die cast, and the burner body 1 includes a mixing tube 1A and a burner base 1B.
At the base end of the mixing pipe 1A of the burner body 1, a gas nozzle 5 for jetting gas fuel into the mixing pipe 1A is disposed. When the gas fuel is jetted from the gas nozzle 5 to the mixing pipe 1A, an ejector action is used. The primary air is sucked, the gaseous fuel and the primary air are mixed inside the mixing pipe 1A, and the mixed gas is supplied to the burner base 1B.

As shown in FIGS. 4 and 5, the burner base 1 </ b> B is formed in an annular shape having a secondary air flow hole 6 in the center.
Specifically, the burner base 1B is provided with a disc-shaped bottom portion 7 connected to the mixing tube 1A, and an inner cylinder portion 8 forming the secondary air flow hole 6, and further, a disc-like shape. An annular flame mouth forming portion 9 having a smaller diameter than the bottom portion 7 is provided in a state of being positioned at the upper portion of the disc-shaped bottom portion 7.
An annular gas supply chamber 10 having an upper opening is provided between the inner cylinder portion 8 and the flame opening formation portion 9, and the mixed gas from the mixing tube 1 </ b> A flows through the gas supply chamber 10. Has been.

The burner cap 2 is formed in an annular shape and is placed on the flame opening forming portion 9 so as to cover the upper portion of the gas supply chamber 10. As shown in FIG. A fitting cylinder portion 2A that fits into the inner cylinder portion 8 of the burner base 1B is formed on the peripheral portion, and the fitting cylinder portion 2A is inside when the burner cap 2 is placed on the flame opening forming portion 9. It is comprised so that it may fit in the cylinder part 8. FIG.
An arcuate plate-like portion 2a is provided at the tip of the fitting cylinder portion 2A, and the burner cap 2 is placed on the flame port forming portion 9 at an appropriate rotational phase. The plate-like portion 2a is configured to engage with an engaging portion (not shown) provided inside the inner cylindrical portion 8 of the base 1B.

On the lower surface of the burner cap 2, as shown in FIG. 6, a plurality of groove-shaped flame opening grooves 11 for guiding the mixed gas in the gas supply chamber 10 radially outward and groove-shaped ignition flame ports are formed. In the state where the groove 12 is formed along the circumferential direction and the burner cap 2 is placed on the flame mouth forming portion 9, the flame is directed radially outward between the flame mouth forming portion 9 and the burner cap 2. A plurality of flame mouths E and ignition flame mouths F are formed.
An annular step D is formed on the upper surface of the flame mouth forming portion 9, and the mixed gas is allowed to flow through the step D to improve flame holding performance.

A spark plug P and an ignition sensor Q for igniting the gas fuel ejected from the ignition flame port F are provided on the outer peripheral part of the flame port forming part 9 in a form supported by the bottom 7 of the burner base 1B. The details will be described later.
Incidentally, one of the plurality of flame outlets E is used as the ignition detection flame outlet Et, and the ignition sensor Q detects that a flame is formed in the ignition detection flame outlet Et. Become.

In addition, a juice receiving tray 13 is provided at the upper part of the burner cap 2 with a gap for passing secondary air, so that the soup is not attached to the upper part of the burner cap 2. .
Further, a secondary air hole 14 is formed in the juice receiving tray 13.

  The flame mouth forming portion 9 is configured to include an overhanging portion 9A that projects radially outward from the burner cap 2, and a plurality of secondary air rising along the outer periphery of the flame mouth forming portion 9 is used. It is comprised so that the flame formed in the flame outlet E may be suppressed.

  That is, the mixed gas ejected from the plurality of flame outlets E rises through the secondary air flow holes 6 of the burner base 1B after rising along the outer periphery of the flame formation portion 9, and then burner cap 2 and soup The air flowing radially outward through the gap with the saucer 13 and the air discharged from the secondary air hole 14 of the juice saucer 13 after rising through the secondary air flow hole 6 of the burner base 1B The secondary air is used for complete combustion.

  And the flame formation part 9 is provided with the overhang | projection part 9A, As mentioned above, the flame formed in the several flame opening E with the secondary air which raises along the outer periphery of the flame formation part 9 It is configured to burn well while suppressing being beaten.

  Further, in the present embodiment, the overhang portion 9A is formed so as to be positioned slightly below the upper surface of the flame opening forming portion 9, and the flame formed at the flame port E is stretched over the overhang portion 9A. It is configured to suppress burning in the attached state.

(Ignition plug mounting configuration)
As shown in FIGS. 2 to 4, a spark plug mounting recess U that is recessed inward in the radial direction is formed at a location corresponding to the ignition flame F in the flame formation portion 9.
The spark plug P is provided in a state of entering the spark plug mounting recess U and protruding upward from the spark plug mounting bottom Ut corresponding to the bottom of the spark plug mounting recess. .

  A flange portion 2B that protrudes radially outward from the burner cap 2 is provided at an upper portion of the spark plug P. As shown in FIG. 6, the lower surface of the flange portion 2B is connected to the discharge electrode Pd of the spark plug P. There is provided an ignition spark target G for generating a spark therebetween.

  As described above, by providing the spark plug P in a state where it is inserted into the spark plug mounting recess U, the spark plug P is brought close to the spark port F for ignition while the flame port forming portion 9 includes the overhang portion 9A. In this manner, the mixed gas ejected from the ignition flame port F can be appropriately ignited.

As shown in FIG. 7 to FIG. 9, the spark plug mounting recess U is formed from the back side portion Ur positioned at a distance from the back portion of the spark plug and from both ends in the circumferential direction of the back side portion Ur. And a pair of extending portions Us extending outward in the radial direction.
And a pair of extension part Us is formed in the form which enlarges the space | interval in the circumferential direction toward the radial direction outer side.

Specifically, as shown in FIG. 8, the pair of extending portions Us are in a state in which the phantom line K connecting the distal ends thereof is located radially inward of the spark plug P in plan view. Further, the inner surfaces of the pair of extending portions Us facing the spark plug P are formed in a flat surface shape.
That is, in the present embodiment, the pair of extending portions Us is configured to be aligned in a straight line in a plan view, and the back side portion Ur is formed in an arc shape concentric with the outer diameter of the spark plug P. .

  As described above, since the pair of extending portions Us are formed in such a manner that the distance in the circumferential direction is increased toward the radially outer side, a large gap is formed between the pair of extending portions Us and the spark plug P. Since there is a gap, it is easy to wipe and clean the inner surface of the spark plug mounting recess U facing the spark plug P and the spark plug mounting bottom surface Ut.

  In addition, since the pair of extending portions Us are formed so that the imaginary line K connecting the distal ends thereof is positioned radially inward of the spark plug P in plan view, the spark plug is attached. When cleaning the inner surface of the bottom surface Ut and the inner surface of the spark plug mounting recess U, a state extending in the tangential direction of the flame port forming portion 9 between the spark plug P and the inner surface of the spark plug mounting recess U in plan view Thus, it is possible to adopt a configuration in which a cleaning body such as a piece of cloth is inserted and the cleaning body is cleaned while reciprocating in the tangential direction of the flame opening forming portion 9.

  When cleaning is performed in this cleaning mode, the cleaning body comes into contact with the spark plug P. In a plan view, the pair of extending portions Us are imaginary lines connecting their tip portions. Since it is formed so as to be positioned radially inward of P, the cleaning body is difficult to apply a large load (force) to the spark plug P.

Moreover, as shown in FIGS. 7 and 9, the bottom surface Ut for mounting the spark plug is formed in an inclined shape that is lower on the radially outer side.
In the present embodiment, the bottom surface Ut for attaching the spark plug is formed in an inclined shape that is lower in the radially outer side and lower in the circumferential direction than the portion where the spark plug P is located.

  Therefore, when filth such as boiled juice falls on the spark plug mounting bottom surface Ut, the filth can be prevented from flowing radially outward of the spark plug mounting bottom surface Ut and accumulating on the spark plug mounting bottom surface Ut. Therefore, it is possible to simplify the cleaning operation for the spark plug mounting bottom surface Ut.

  In addition, the filth falling on the spark plug mounting bottom surface Ut flows to the side away from the portion where the spark plug P is located in the circumferential direction, and at the corner portion between the spark plug mounting bottom surface Ut and the outer peripheral surface of the spark plug, Since it is possible to suppress the accumulation of dirt, it is possible to further simplify the cleaning work for the bottom surface Ut for mounting the spark plug.

(Ignition configuration of ignition sensor)
As shown in FIGS. 2 and 5, an ignition sensor mounting recess W that is recessed inward in the radial direction is formed at a location corresponding to the ignition detection flame outlet Et in the flame opening forming portion 9.
The ignition sensor Q is provided in a state of entering the ignition sensor mounting recess W and protruding upward from the ignition sensor mounting bottom surface Wt corresponding to the bottom of the ignition sensor mounting recess W. .
Incidentally, in the present embodiment, the inner surface of the ignition sensor mounting recess W facing the ignition sensor Q is formed in an arc shape concentric with the outer diameter of the ignition sensor Q in plan view.

Thus, by providing the ignition sensor Q in the state where it is inserted into the ignition sensor mounting recess W, the ignition sensor Q is placed on the ignition detection flame outlet Et while the flame opening forming portion 9 includes the overhang portion 9A. It is configured to be able to appropriately detect the flame formed at the ignition detection flame outlet Et so as to approach each other.
Incidentally, the ignition sensor Q is equipped with a temperature detection element such as a temperature detection thermistor to detect the presence of a flame, but since its configuration is well known, detailed description is omitted in this embodiment. To do.

As shown in FIGS. 10 and 11, the bottom surface Wt for mounting the ignition sensor is formed in an inclined shape that is lower on the radially outer side.
In the present embodiment, the bottom surface Wt for mounting the ignition sensor is formed in an inclined shape that is lower on the radially outer side and lower on the periphery of the portion where the ignition sensor Q is located in the circumferential direction.

  Therefore, when filth such as broth falls on the ignition sensor mounting bottom surface Wt, the filth can be prevented from flowing radially outward of the ignition sensor mounting bottom surface Wt and accumulating on the ignition sensor mounting bottom surface Wt. Therefore, it is possible to simplify the cleaning operation for the bottom surface Wt for mounting the ignition sensor.

  In addition, the filth falling on the ignition sensor mounting bottom surface Wt flows away from the portion where the ignition sensor Q is located in the circumferential direction, and at the corner portion between the ignition sensor mounting bottom surface Wt and the outer peripheral surface of the spark plug, Since accumulation of filth can be suppressed, the cleaning operation for the bottom surface Wt for mounting the ignition sensor can be further simplified.

[Another embodiment]
Hereinafter, other embodiments are listed.

(1) In the above embodiment, the case where the pair of extending portions Us of the spark plug mounting recess U are arranged in a straight line in a plan view is exemplified. Various modifications can be made to the specific configuration of the form in which the distance between the pair of extending portions Us is increased in the circumferential direction, such as the protruding portions Us are arranged in a V shape.

(2) In the above embodiment, the case where the back side portion Ur of the spark plug mounting recess U is configured in an arc shape in plan view is exemplified, but for example, the back side portion Ur is linear in plan view. The configuration of the back side portion Ur can be variously changed.

(3) In the above embodiment, the form in which the arcuate back portion Ur is present between the pair of extending portions Us aligned in a straight line in a plan view, but the pair of extending portions Us and the back portion is exemplified. The entire side part Ur may be arranged in a straight line.

(4) In the above embodiment, the case where the spark plug mounting bottom surface Ut is formed in an inclined shape that is lower in the radially outer side and lower in the circumferential direction is further away from the portion where the spark plug P is located. However, the spark plug mounting bottom surface Ut may be simply formed in an inclined shape that is lower on the radially outer side.

(5) The above embodiment exemplifies a case where the ignition sensor mounting bottom surface Wt is formed in an inclined shape that is lower in the radially outer side and lower in the circumferential direction than the portion where the ignition sensor Q is located. However, the bottom surface Wt for mounting the ignition sensor may be simply formed in an inclined shape that is lower on the radially outer side.

DESCRIPTION OF SYMBOLS 1 Burner body 2 Burner cap 9 Flame opening formation part 9A Overhang part E Flame opening Et Flame opening for ignition detection F Flame opening for ignition G Ignition spark target K Virtual line P Spark plug Q Ignition sensor U Spark plug mounting recess Ur Back Side portion Us Extending portion Ut Spark plug mounting bottom surface W Ignition sensor mounting recess Wt Ignition sensor mounting bottom surface

Claims (7)

A plurality of flame mouths and an ignition for forming a flame radially outwardly between the flame mouth formation portion and the burner cap, wherein a burner cap is placed on the annular flame mouth formation portion of the burner body A flame port is formed along the circumferential direction,
The flame opening forming portion is configured to include a projecting portion projecting radially outward from the burner cap,
A spark plug mounting recess that is recessed radially inward is formed at a location corresponding to the ignition flame mouth in the flame mouth forming portion,
A spark plug is provided in a state of entering the spark plug mounting recess and projecting upward from the bottom surface of the spark plug mounting corresponding to the bottom of the spark plug mounting recess,
A gas stove burner provided with an ignition spark target at a location above the spark plug,
The recess for mounting the spark plug has a pair of extensions extending radially outward from each of a back side portion that is spaced from the back portion of the spark plug and both circumferential ends of the back side portion. Formed in a form comprising a protruding portion,
A gas stove burner in which the pair of extending portions are formed in such a manner that the interval in the circumferential direction increases toward the radially outer side.   The gas stove burner according to claim 1, wherein the pair of extending portions are formed such that, in plan view, an imaginary line connecting the tip portions thereof is positioned radially inward from the spark plug. .   The gas stove burner according to claim 1 or 2, wherein inner surfaces of the pair of extending portions facing the ignition plug are formed in a flat surface shape.   The burner for a gas stove according to any one of claims 1 to 3, wherein the bottom surface for mounting the spark plug is formed in an inclined shape that becomes lower toward the radially outer side.   5. The burner for a gas stove according to claim 4, wherein the bottom surface for mounting the spark plug is formed in an inclined shape such that the bottom surface is radially lower and the lower the surface is away from the portion where the spark plug is located in the circumferential direction. An ignition sensor mounting recess that is recessed inward in the radial direction is formed at a location corresponding to the ignition detection flame mouth of the flame mouth in the flame mouth forming portion,
An ignition sensor that detects that a flame has been formed in the ignition detection flame opening is inserted into the ignition sensor mounting recess and from the bottom of the ignition sensor mounting corresponding to the bottom of the ignition sensor mounting recess. Provided in a state of projecting upward,
The burner for a gas stove according to any one of claims 1 to 5, wherein the bottom surface for mounting the ignition sensor is formed in an inclined shape that becomes lower in the radially outer side.   The burner for a gas stove according to claim 6, wherein the bottom surface for mounting the ignition sensor is formed in an inclined shape such that the lower side in the radial direction is lower and the lower the position is away from the portion where the ignition sensor is located in the circumferential direction.

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