1. A fire power adjusting device which can adjust the fire power of 1 st and 2 nd burners in linkage with a single operating rod operated to swing along the horizontal direction, wherein a valve housing is provided on a gas supply path for supplying gas to the 1 st and 2 nd burners, and: a 1 st needle valve capable of changing the supply amount of the gas supplied to the 1 st burner, and a 2 nd needle valve capable of changing the supply amount of the gas supplied to the 2 nd burner,

comprising: a cam plate provided outside the valve housing and oscillating in conjunction with the operating rod,

the cam plate is provided with: a 1 st cam hole engaged with a 1 st pin fixed to the 1 st needle valve, and a 2 nd cam hole engaged with a 2 nd pin fixed to the 2 nd needle valve,

by the swing of the cam plate, the 1 st needle valve advances and retreats in the axial direction of the 1 st needle valve through the 1 st cam hole and the 1 st pin for adjusting the gas supply amount to the 1 st burner, and the 2 nd needle valve advances and retreats in the axial direction of the 2 nd needle valve through the 2 nd cam hole and the 2 nd pin for adjusting the gas supply amount to the 2 nd burner,

when one of the 2-axis needles perpendicular to the horizontal direction is set as the X-axis and the other is set as the Y-axis, the axes of the 1 st needle valve and the 2 nd needle valve are parallel to the X-axis, the 1 st needle valve and the 2 nd needle valve are arranged in parallel with a gap in the Y-axis direction, and the cam plate swings in the horizontal direction.

2. The fire power adjustment apparatus of claim 1,

the cam plate is integral with the operating lever.

3. The fire power adjusting apparatus according to claim 1 or 2,

the 1 st cam hole and the 2 nd cam hole partially overlap in a swing direction of the cam plate within a predetermined sector range centered on a swing center of the cam plate.

Background

Conventionally, as this kind of heating power control device, there is known a heating power control device in which a valve housing is provided in a gas supply passage for supplying gas to both the 1 st and 2 nd burners, and in which: the fuel gas injection valve further comprises a 1 st needle valve capable of changing the supply amount of fuel gas to the 1 st burner, a 2 nd needle valve capable of changing the supply amount of fuel gas to the 2 nd burner, a cam plate which is swingable in association with the operating rod and is provided outside the valve housing, and the cam plate is provided with: the first cam hole engaging with the 1 st pin fixed to the 1 st needle valve and the 2 nd cam hole engaging with the 2 nd pin fixed to the 2 nd needle valve, the 1 st needle valve advances and retreats in the axial direction of the 1 st needle valve via the 1 st cam hole and the 1 st pin by the swing of the cam plate, and the supply amount of the gas supplied to the 1 st burner can be adjusted, and the 2 nd needle valve advances and retreats in the axial direction of the 2 nd needle valve via the 2 nd cam hole and the 2 nd pin, and the supply amount of the gas supplied to the 2 nd burner can be adjusted (for example, refer to patent document 1).

In this heating power adjusting apparatus, the 1 st needle valve and the 2 nd needle valve are arranged in parallel with an interval in the vertical direction, and the cam plate swings in the vertical direction. Therefore, the vertical dimension of the heating power adjustment device becomes large, and it is difficult to assemble the heating power adjustment device to a thin gas appliance having a small vertical dimension.

Patent document

Patent document 1: japanese laid-open patent publication No. 5-306815

Disclosure of Invention

The present invention has been made in view of the above points, and an object thereof is to provide a heating power adjusting device capable of shortening the vertical dimension.

In order to solve the above problems, a heating power adjusting apparatus according to the present invention is a heating power adjusting apparatus that adjusts heating power of the 1 st and 2 nd burners in association with a single operating lever that is operated to swing in a horizontal direction, wherein a valve housing is provided in a gas supply passage that supplies gas to the 1 st and 2 nd burners, and: the 1 st needle valve capable of changing the gas supply amount to the 1 st burner and the 2 nd needle valve capable of changing the gas supply amount to the 2 nd burner, comprising: a cam plate provided outside the valve housing and adapted to swing in conjunction with the operating rod, the cam plate including: the fuel injection valve is characterized in that when one of the 2 nd needle valves which are orthogonal in the horizontal direction is set as an X-axis and the other is set as a Y-axis, the axes of the 1 st needle valve and the 2 nd needle valve are parallel to the X-axis, the 1 st needle valve and the 2 nd needle valve are arranged in parallel with a gap in the Y-axis direction, and the cam plate swings in the horizontal direction.

According to the present invention, by arranging the 1 st needle valve and the 2 nd needle valve in parallel in the horizontal Y-axis direction, the cam plate can be swung in the horizontal direction, and the two needle valves can be advanced and retracted in the horizontal X-axis direction, which is the axial direction thereof, and the heating power of the 1 st burner and the 2 nd burner can be adjusted. Therefore, the vertical dimension of the heating power adjustment device can be shortened. The term "horizontal" does not mean completely horizontal, but includes a direction slightly inclined from horizontal.

In addition, in the present invention, since the cam plate swings in the horizontal direction, the cam plate can be provided integrally with the operation lever that swings in the horizontal direction. This reduces the number of parts and reduces the cost.

In the present invention, it is preferable that the 1 st cam hole and the 2 nd cam hole partially overlap each other in the swing direction of the cam plate within a predetermined sector range centered on the swing center of the cam plate. This can shorten the width of the cam plate in the swing direction, and can reduce the size of the cam plate.

Drawings

Fig. 1 is a perspective view of a valve unit having a fire power adjusting apparatus according to an embodiment of the present invention.

Fig. 2 is a top view of the valve unit of fig. 1.

Fig. 3 is a side view of a portion of the valve unit of fig. 1 where a needle valve is disposed.

Fig. 4 is a cross-sectional view taken along line IV-IV of fig. 3.

Fig. 5 is a perspective view of the valve unit of fig. 1 in a partially exploded state.

Fig. 6 is an enlarged sectional view taken along line VI-VI of fig. 2.

Fig. 7 is a graph showing the relationship between the rotational position of the cam plate, the gas supply amount, and the rotational load of the cam plate.

Description of the reference numerals

A … fire power regulating device, B₁… burner 1, B₂… burner 2, 2 … valve casing, 3₁… th needle valve, 1 st, 3₂… 2 nd needle valve, 4 … operating lever, 5 … cam plate, 51₁… cam hole 1, 51₂… cam hole 2, 6₁… item 1, 6₂… pin No. 2.

Detailed Description

The heating power adjustment apparatus a according to the embodiment of the present invention shown in fig. 1 and 2 can change the amount of gas supplied to the stove burner B having the 1 st burner B composed of the main burner having a large capacity₁And a 2 nd burner B composed of a small-capacity sub-burner₂. The fire power adjusting apparatus a is provided in an upper portion of a valve unit 1, wherein the valve unit 1 is provided with: an operation member 11 which is pushed and operated by an ignition key-off button on the front surface of the cooktop body, not shown. At the lower part of the valve unit 1, although not shown, are mounted: an electromagnetic safety valve and an opening and closing valve on the downstream side thereof. When the operating member 11 is pushed backward, the electromagnetic safety valve is forcibly opened, and the on-off valve is opened to supply gas to the stove burner B.

As shown in fig. 4, the fire power control apparatus a includes, in a valve housing 2 at an upper portion of a valve unit 1: a 1 st burner B arranged to advance and retreat along the front and rear direction as the axial direction₁Using the 1 st needle valve 3₁And 2 nd burner B₂Using the 2 nd needle valve 3₂. The valve housing 2 is formed with: 1 st gas outlet 21₁With the 1 st burner B₁Connecting; 2 nd gas outlet 21₂With the 2 nd burner B₂Connecting; 1 st valve chamber 23₁Through the 1 st valve hole 22₁And 1 st gas outlet 21₁A communication opening which is long in the front-rear direction and opens to the front (right in fig. 4) of the valve housing 2; 2 nd valve chamber 23₂Through the 2 nd valve hole 22₂And 2 nd gas outlet 21₂A communication part which is opened to the front of the valve housing 2 in the front-rear direction; 1 st gas inlet 24₁A gas passing through the on-off valve flows into the 1 st valve chamber 23₁(ii) a And 2 nd gas inlet 24₂A gas flowing through the on-off valve into the 2 nd valve chamber 23₂. And, in the 1 st valve chamber 23₁And 2 nd valve chamber 23₂In the middle, a 1 st needle valve 3 is slidably inserted from the front₁And 2 nd needle valve 3₂。

1 st needle valve 3₁And 2 nd needle valve 3₂The rear end portion has: can be connected with the 1 st valve hole 22₁And the 2 nd valve hole 22₂The engaged needle part 3₁a、3₂a. And even at each needle portion 3₁a、3₂a and each valve hole 22₁、22₂A bypass hole 3 for allowing the gas to flow even in the fitted state₁b、3₂b. In addition, the 1 st valve chamber 23₁A stepped shape with a small diameter at the rear part is formed in the 1 st valve chamber 23₁Large diameter portion 23₁a is provided with a 1 st gas inlet 24₁. In the 1 st needle valve 3₁Of the slave needle part 3₁a portion slightly separated forward is provided with: can be connected with the 1 st valve chamber 23₁Rear minor-diameter portion 23 of₁b an O-ring 3 fitted therein₁c. And, in the O-ring 3₁c and the 1 st valve chamber 23₁Small diameter portion 23₁B in the state of fitting, stopping the combustion in the 1 st burner B₁Supplying gas while passing through the 1 st needle valve 3₁Moving forward, O-ring 3₁c from the 1 st valve chamber 23₁Small diameter portion 23₁b to the large diameter portion 23₁at time a, start to the 1 st burner B₁Gas is supplied.

Referring to fig. 1 to 5, the fire power adjusting apparatus aThe oven further includes a cam plate 5, and the cam plate 5 is provided outside the valve casing 2 and swings in conjunction with the horizontal swing of the operating lever 4 protruding forward from the front surface of the oven body, not shown. The cam plate 5 includes: and is fixed to the 1 st needle valve 3₁1 st pin 6₁Engaged 1 st cam hole 51₁And a needle valve 3 fixed to the 2 nd needle valve₂2 nd pin 6₂Engaged 2 nd cam hole 51₂. Further, to the outer surface of the valve housing 2, there are fixed: and a guide plate 7 located on the back side of the cam plate 5. The guide plate 7 is formed with: for the 1 st pin 6₁And 2 nd pin 6₂Inserted through the 1 st needle valve 3₁And 2 nd needle valve 3₂1 st guide hole 71 long in the axial direction (front-rear direction)₁And the 2 nd guide hole 71₂. Then, by the swing of the cam plate 5, the first cam hole 51 is passed through₁And the 1 st pin 6₁1 st needle valve 3₁Along the 1 st needle valve 3₁Is advanced and retreated in the axial direction of the burner for adjusting to the 1 st burner B₁The supplied gas is supplied through the 2 nd cam hole 51₂And 2 nd pin 6₂2 nd needle valve 3₂Along the 2 nd needle valve 3₂Is advanced and retreated in the axial direction of the burner for adjusting to the 2 nd burner B₂The supply amount of the supplied gas.

In addition, the 1 st guide hole 71₁And the 2 nd guide hole 71₂Slightly inclined with respect to the axial direction so that the 1 st needle valve 3₁And 2 nd needle valve 3₂Can move in the axial direction while slightly rotating. In addition, the 1 st cam hole 51 may be provided₁And the 2 nd cam hole 51₂The 1 st and 2 nd cam holes 51₁、51₂Is continuously connected into a pen shape.

If the cam plate 5 swings counterclockwise in the drawing from the minimum fire position shown in fig. 1 and 2, it passes through the 1 st cam hole 51₁And the 1 st pin 6₁1 st needle valve 3₁Moves from the position shown in FIG. 4 to one side (forward) of the axial direction and moves to the 1 st burner B₁The amount of gas supplied is changed as shown by line a in FIG. 7, andand, via the 2 nd cam hole 51₂And 2 nd pin 6₂2 nd needle valve 3₂Moves from the position shown in FIG. 4 to the axial direction and moves to the 2 nd burner B₂The amount of gas supplied changes as shown by line b in fig. 7.

Here, if the cam plate 5 is included in the first-to-1 st combustor B₁If the gas supply is slowly oscillated within a predetermined oscillation range θ a within the oscillation position of the gas supply, there is a possibility that the gas supply may oscillate in the 1 st combustor B₁Tempering occurs. Therefore, it is preferable to give a click feeling (or touch feeling) when the cam plate 5 rotates to the swing range θ a so that the cam plate 5 is swiftly swung within the swing range θ a. Therefore, provided are: and a touch mechanism 8 for giving a click feeling when the cam plate 5 swings to the swing range θ a.

The touch mechanism 8 includes a protrusion 81 provided on the guide plate 7 on the back surface side of the cam plate 5 and protruding toward the cam plate 5, and a plate spring 82 disposed on the front surface side of the cam plate 5. The plate spring 82 includes: and a shaft support hole 821 externally fitted to a boss portion 25 described later for supporting the cam plate 5. The leaf spring 82 is pressed by a pressing screw 83 screwed to the boss portion 25. As shown in fig. 6, the projection 81 is pressed against the tip 822 of the plate spring 82 at all times through the through hole 53 formed in the cam plate 5. The plate spring 82 is provided with: the plate spring 82 rotates together with the cam plate 5 by the claw portions 823 and 824 engaging with the locking hole 54 and the notch 55 formed in the cam plate 5.

Further, a convex portion 825 protruding toward the cam plate 5 side is provided at a circumferential center portion of the distal end portion 822 of the plate spring 82. When the cam plate 5 rotates to the above-described swing range θ a, the convex portion 825 abuts on the projection 81 and rises, and the swing load of the cam plate 5 increases as indicated by line c in fig. 7, thereby giving a click feeling. Therefore, in the above-described rocking range θ a of the cam plate 5, the force applied to the operating rod 4 is enhanced to counter the increased rocking load to rock the cam plate 5 abruptly, and the 1 st combustor B can be prevented from being involved₁And (4) tempering.

Here, one of the horizontal orthogonal 2 axes, i.e., the axis in the front-rear direction is setThe other, lateral axis is set as the X axis, and in the present embodiment, the 1 st needle valve 3 is set as the Y axis₁And 2 nd needle valve 3₂Is parallel to the X-axis, so that the 1 st needle valve 3₁And 2 nd needle valve 3₂Are arranged in parallel with a gap in the Y-axis direction. Further, the cam plate 5 is formed with a shaft support hole 52, the shaft support hole 52 is externally fitted to a boss portion 25 provided to protrude from the upper surface of the valve housing 2, and the cam plate 5 swings in the horizontal direction with the boss portion 25 as a fulcrum. Thus, the 1 st and 2 nd needle valves 3 are arranged in parallel in the horizontal Y-axis direction₁、3₂The cam plate 5 can be swung in the horizontal direction to swing the two needle valves 3₁、3₂The burner can advance and retreat along the horizontal X-axis direction as the axial direction of the burner, and can be used for the 1 st and the 2 nd burners B₁、B₂The firepower of the furnace is adjusted. Therefore, the vertical dimension of the heating power adjustment device a can be shortened, and the heating power adjustment device a can be assembled even in a thin gas cooker with a vertical dimension reduced.

Further, since the cam plate 5 swings in the horizontal direction, the cam plate 5 can be integrated with the operation lever 4 which swings in the horizontal direction. Therefore, in the present embodiment, the operation lever 4 is integrally formed by bending the outer edge of the cam plate 5, and the cam plate 5 and the operation lever 4 are integrally provided. This reduces the number of parts and reduces the cost.

In the present embodiment, as clearly shown in fig. 2, the 1 st cam hole 51 is formed in a predetermined fan-shaped range W centered on the swing center of the cam plate 5₁And 2 nd cam hole 51₂Partially overlapping in the swinging direction of the cam plate 5. This can shorten the width of the cam plate 5 in the swing direction, and can reduce the size of the cam plate 5.

The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited thereto. For example, the 1 st guide hole 71 may be formed in the valve housing 2₁And the 2 nd guide hole 71₂The guide plate 7 is omitted from the corresponding guide hole, and a protrusion for the touch mechanism 8 is integrally formed in the valve housing 2. However, since the valve housing 2 is openSince the valve housing 2 is usually made of aluminum die-cast, it is difficult to secure durability by forming a guide hole or a projection in the valve housing. Therefore, it is preferable that the guide plate 7 is provided as in the above-described embodiment, and the 1 st guide hole 71 is formed in the guide plate 7₁And the 2 nd guide hole 71₂And a protrusion 81. In the above embodiment, the pair of electrodes includes: 1 st burner B composed of main burner₁And a 2 nd burner B composed of a sub-burner₂The heating power of the stove burner B in (1) can be adjusted, but the present invention can be similarly applied to a heating power adjusting device for adjusting the heating power of the 1 st burner and the 2 nd burner.