JP2019002630A - Cooking stove burner - Google Patents

Abstract

To obtain a desired fixing force of a burner cover without strictly managing a width dimension of a claw part and an inside diameter dimension of a recessed hole in a cooking stone burner which comprises the annular burner cover 8 for covering an upper face of a burner cap 4 with a clearance in a vertical direction, forms an external peripheral cylinder part at an external peripheral edge of the burner cover for blocking the clearance between the burner cap and the burner cover over the whole periphery, and fixes the burner cover by pressure-inserting the claw part 83 arranged at the burner cover into the recessed hole 45 which is formed at the upper face of the burner cap.SOLUTION: An inverted V-shape notch 831 is formed at a lower edge of a claw part 83, and an inverted V-shape protrusion 451 is formed at a bottom of a recessed hole 45. When inserting the claw part 83 into the recessed hole 45, the notch 831 is expanded to the outside by the bite-in of the protrusion 451, and both-side edges of the claw part 83 pressure-contact with a hole wall face of the recessed hole 45.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a stove burner provided in a gas stove.

  The stove burner includes an annular burner cap that is placed on the burner body, and an annular wall that abuts the other on one of the upper surface outer peripheral portion of the burner body and the lower surface outer peripheral portion of the burner cap. A plurality of blisters are formed in the wall at intervals in the circumferential direction.

  By the way, if the spillage falls to the portion near the outer periphery of the upper surface of the burner cap that is close to the flame opening during combustion, the portion of the burner cap where the spillage has dropped is rapidly cooled, which adversely affects the durability of the burner cap. Therefore, conventionally, a stove burner is known that includes an annular burner cover that covers the upper surface of the burner cap with a gap in the vertical direction (see, for example, Patent Document 1).

  However, even in this case, boiled spills falling on the burner cover may wrap around from the outer peripheral edge of the burner cover to the lower surface of the burner cover and fall to the portion near the outer periphery of the upper surface of the burner cap. Therefore, it is not possible to reliably prevent the spilling from falling on the portion near the outer periphery of the upper surface of the burner cap.

  In order to solve such a problem, it is conventionally known from Patent Document 2 that an outer peripheral cylindrical portion that closes the gap between the burner cap and the burner cover over the entire circumference is formed on the outer peripheral edge portion of the burner cover. Yes. According to this, it is possible to prevent the boiled spill falling on the burner cover from flowing from the outer peripheral edge of the burner cover to the lower surface of the burner cover, and the boiled spilled along the lower surface of the burner cover and the outer periphery of the upper surface of the burner cap. It is possible to prevent falling to the side portion.

  Moreover, in the thing of patent document 2, while the nail | claw part which protrudes below is formed in the lower end of an outer periphery cylinder part so that attachment and loss of a burner cover can be prevented beforehand, it forms in the upper surface outer periphery part of a burner cap. A concave hole into which the claw portion is press-fitted is formed so that the burner cover cannot be easily removed from the burner cap. However, in this case, boiled spills that fall on the burner cover may enter the concave hole through the outer peripheral cylindrical portion. And the press-fit fixing location of a nail | claw part will corrode by the spillage collected in the concave hole, and the fixing force of a burner cover will weaken.

  Therefore, it is desirable to provide a claw portion projecting downward on the lower surface portion radially inward of the outer peripheral edge portion of the burner cover and press fit the claw portion into a concave hole formed on the upper surface of the burner cap. According to this, the nail | claw part and a concave hole do not spill, and it can prevent that the fixing force of a burner cover weakens under the influence of a spill. However, in order to secure the fixing force of the burner cover by press-fitting the claw part into the concave hole, it is necessary to strictly manage the width dimension of the claw part and the inner diameter dimension of the concave hole. It becomes a factor.

JP 2014-77593 A JP 2006-109343 A

  In view of the above, the present invention provides a stove burner in which a required fixing force of a burner cover can be obtained without strictly managing the width dimension of the claw piece and the inner diameter dimension of the concave hole. That is the issue.

  In order to solve the above-described problems, the present invention includes an annular burner cap that is placed on a burner body, and an annular wall that abuts the other of the upper surface outer periphery of the burner body and the lower surface outer periphery of the burner cap. And a burner cover in which a plurality of flame openings are formed on the annular wall at intervals in the circumferential direction, and the annular burner cover covers the upper surface of the burner cap with a gap in the vertical direction. And an outer peripheral cylindrical portion that closes the gap between the burner cap and the burner cover over the entire circumference is formed on the outer peripheral edge portion of the burner cover, and the lower surface portion radially inward from the outer peripheral edge portion of the burner cover Are provided with a claw that protrudes downward and a concave hole is formed on the upper surface of the burner cap. The claw has an inverted V-shaped notch at the lower edge. The concave hole has a vertical angle at the bottom and a vertical angle at the notch. When the nail part is inserted into the concave hole, the notch part is expanded outward by the bite of the protrusion part, and both side edges of the nail part are It is characterized by being pressed against the hole wall surface of the concave hole.

  According to the present invention, both side edges of the claw portion are pressed against the hole wall surface of the concave hole by expanding the notch portion due to the biting of the protruding portion without strictly controlling the width dimension of the claw portion and the inner diameter size of the concave hole. Thus, the required fixing force of the burner cover can be obtained. And since strict dimension management becomes unnecessary, productivity improvement and cost reduction can be aimed at.

  Further, in the present invention, the claw portion has a protruding portion that protrudes outward at both side edge portions to a position where it presses against the hole wall surface of the concave hole, and the lower side of the protruding portion is inclined upward toward the outside. It is desirable that According to this, the protrusion can bite into the hole wall surface of the concave hole, so that the fixing force of the burner cover can be increased, and further, the resistance when inserting the claw into the concave hole due to the inclination of the lower side of the protrusion. As a result, assembly workability can be improved.

The perspective view which shows the stove burner of embodiment of this invention. Sectional drawing cut | disconnected by the II-II line | wire of FIG. Sectional drawing cut | disconnected by the III-III line | wire of FIG. (A) The perspective part seen from diagonally downward of the burner cover of the burner cover of embodiment, (b) The perspective part seen from diagonally upward of the burner cap of the cooker of embodiment. The expanded sectional view which shows the nail | claw part and concave hole of the stove burner of embodiment. Sectional drawing which shows the modification of a nail | claw part.

  1 to 3, TP is a top plate of a gas stove, and the stove burner 1 according to the embodiment of the present invention is arranged facing a burner opening TPa opened on the top plate TP. The stove burner 1 includes a burner body 3 that extends upward from the downstream end of the mixing tube 2 and is inserted into the burner opening TPa, and an annular burner cap 4 that is placed on the burner body 3. The stove burner 1 is provided with a pan bottom temperature sensor 5 projecting upward through the inner circumferential space of the burner cap 4 and an ignition electrode 6 facing the target portion 4a projecting at one location around the burner cap 4. ing.

  The burner body 3 is formed of a hollow ring with an inner cylinder 31 and an outer cylinder 32. An inner bending flange portion 33 is formed at the upper end portion of the outer cylinder 32. Further, a cover ring 7 that covers the burner opening TPa from above is externally inserted into the outer cylinder 32.

  A seal tube portion 41 that is fitted into the upper end portion of the inner tube 31 is suspended from the inner peripheral portion of the burner cap 4. Further, an annular wall 42 is provided on the outer peripheral portion of the lower surface of the burner cap 4 so as to come into contact with the upper surface of the inner bending flange portion 33 of the outer cylinder 32 that is the outer peripheral portion of the upper surface of the burner body 3. A plurality of flame openings 43 each having a groove are formed in the annular wall 42 at intervals in the circumferential direction, and an air-fuel mixture (mixed gas of fuel gas and primary air) from the mixing pipe is formed from these flame openings 43. It blows out and burns. The flame port 43 includes a large flame port 43a having the largest vertical dimension, a small flame port 43b having the smallest vertical dimension, and an intermediate flame port 43c intermediate in the vertical dimension between the large flame port 43a and the small flame port 43b. There are three types. In addition, it is also possible to project an annular wall in contact with the outer peripheral portion of the lower surface of the burner cap 4 on the outer peripheral portion of the upper surface of the burner body 3 to form a flame opening.

  At one place on the lower surface of the burner cap 4, there is provided a projecting portion 44 for phasing that engages with a recess 33 a formed at one place in the circumferential direction of the inner bending flange portion 33. Further, the burner cap 4 is made of an aluminum alloy such as the ADC 12 to reduce the weight. However, the burner cap 4 can be formed of other materials such as brass.

  By the way, when the spilled portion falls to the upper peripheral portion of the burner cap 4 which is close to the flame opening 43 and becomes hot during combustion, the portion of the burner cap 4 where the spilled portion is dropped is rapidly cooled, and the durability of the burner cap 4 is adversely affected. Reach. Therefore, a burner cover 8 made of an annular plate that covers the upper surface of the burner cap 4 with a gap in the vertical direction is provided to prevent spilling from falling on the upper surface of the burner cap 4. The burner cover 8 is made of stainless steel and has a high-class feeling, but the burner cover 8 can be formed of other materials such as iron.

  Here, if only the burner cover 8 is provided, the spilled liquid that has fallen on the burner cover 8 may wrap around from the outer peripheral edge of the burner cover 8 to the lower surface of the burner cover 8, and fall on the outer periphery of the upper surface of the burner cap 4. There is. Therefore, an outer peripheral cylindrical portion 81 extending downward is formed on the outer peripheral edge portion of the burner cover 8, and the outer peripheral cylindrical portion 81 is seated on the outer peripheral portion of the upper surface of the burner cap 4. Is closed over the entire circumference by the outer peripheral cylinder portion 81. According to this, it is possible to prevent the boiled spill falling on the burner cover 8 from flowing from the outer peripheral edge of the burner cover 8 to the lower surface of the burner cover 8 by the outer peripheral cylinder portion 81, and the boiled spilled along the lower surface of the burner cover 8. It is possible to prevent the burner cap 4 from falling to a portion near the outer periphery of the upper surface.

  Further, an inner peripheral cylindrical portion 82 extending downward is also formed on the inner peripheral edge of the burner cover 8. This inner peripheral cylinder part 82 is located above the seal cylinder part 41 of the burner cap 4, and the spilled liquid that has fallen onto the burner cover 8 and has flowed to the inner peripheral side passes along the inner cylinder part 82 and is sealed. It falls to the inner periphery of the cylinder part 41.

  Further, in the present embodiment, as clearly shown in FIG. 4, a claw portion 83 that protrudes downward is provided on the lower surface portion radially inward from the outer peripheral edge portion of the burner cover 8, and the claw portion 83 is provided on the upper surface of the burner cap 4. A concave hole 45 into which the portion is press-fitted is formed. More specifically, an annular plate 84 having an outer diameter smaller than the outer diameter of the burner cover 8 is attached to the lower surface of the burner cover 8, and is lowered downward in three circumferential directions on the outer peripheral edge of the annular plate 84. A bent tongue-like claw portion 83 is provided. In addition, positioning portions 84 a that abut the outer peripheral surface of the inner peripheral cylindrical portion 82 of the burner cover 8 and center the annular plate 84 with respect to the burner cover 8 are provided at three positions in the circumferential direction of the inner peripheral edge of the annular plate 84. It has been. Therefore, the three claw portions 83 are positioned on the circumference of a predetermined diameter concentric with the burner cover 8.

  In addition, on the upper surface of the burner cap 4, concave holes 45 are formed concentrically therewith at three positions on the circumference having the same diameter as the predetermined diameter. The burner cover 8 cannot be easily removed from the burner cap 4 by press-fitting each claw 83 into each concave hole 45. Thereby, it is possible to prevent the burner cover 8 from being forgotten or lost. Further, since the claw portion 83 is provided in a portion where the spillage is not radially inward from the outer peripheral edge portion of the burner cover 8, the spillage does not enter the recessed hole 45 into which the claw portion 83 is press-fitted. Accordingly, the press-fitting and fixing portion of the claw portion 83 is not corroded by the spilled water accumulated in the concave hole 45, and the fixing force of the burner cover 8 can be prevented from being weakened due to the spilled effect.

  There is a possibility that a slight gap is formed between the upper surface of the burner cap 4 and the lower end of the outer peripheral cylindrical portion 81 of the burner cover 8, and the spillage may enter from there. Therefore, in the present embodiment, each concave hole 45 is formed in each boss portion 46 that rises upward provided on the upper surface of the burner cap 4. As a result, even if the spilled portion enters from the gap between the upper surface of the burner cap 4 and the lower end of the outer cylindrical portion 81, the spilled portion does not flow up to the upper surface of the boss portion 46 swelled upward, and enters the concave hole 45. Can surely prevent the invasion of spills.

  Further, in the present embodiment, on the upper surface of the burner cap 4, except for the boss portion 46, an inclined portion 47 inclined downward from the seating portion of the outer peripheral cylindrical portion 81 toward the radially inward direction is formed. According to this, even if boiled spilled from the gap between the upper surface of the burner cap 4 and the lower end of the outer peripheral cylinder part 81, this boiled down flows down the inclined part 47 and falls from the seal cylinder part 41, Boiled spillage does not collect on the upper surface of the burner cap 4.

  By the way, in order to simply press-fit the claw part 83 into the concave hole 45 and secure the fixing force of the burner cover 8, it is necessary to strictly manage the width dimension of the claw part 83 and the inner diameter dimension of the concave hole 45. , It becomes a factor of productivity deterioration and cost increase.

  Therefore, in the present embodiment, as shown in FIGS. 4A and 5, the claw portion 83 has an inverted V-shaped cutout portion 831 at the lower edge portion, and the concave hole 45 has a bottom portion. It has an inverted V-shaped protrusion 451 whose apex angle is obtuse than the apex angle of the notch 831. When the claw portion 83 is inserted into the concave hole 45, the notch portion 831 expands outward from the phantom line state of FIG. Both side edge portions are in pressure contact with the hole wall surface of the concave hole 45. According to this, the required fixing force of the burner cover 8 can be obtained without strictly managing the width dimension of the claw portion 83 and the inner diameter dimension of the concave hole 45. As a result, strict dimensional management becomes unnecessary, and productivity can be improved and costs can be reduced.

  In addition, as in the embodiment shown in FIG. 6, the claw portion 83 has an inverted V-shaped notch portion 831 at the lower edge portion, and is externally moved to a position where it presses against the hole wall surface of the concave hole 45 at both side edge portions. It is good also as what has the several or single protrusion part 832 which protrudes in the direction. In addition, the lower side 832a of the protruding portion 832 is inclined upward toward the outside. According to this, the protruding portion 832 bites into the hole wall surface of the recessed hole 45, so that the fixing force of the burner cover 8 can be increased. Further, the inclination of the lower side 832 a of the protruding portion 832 causes the claw portion 83 to be recessed. The resistance at the time of inserting into 45 can be reduced, and assembly workability | operativity can be improved.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above embodiment, the claw portion 83 is formed on the annular plate 84 attached to the lower surface of the burner cover 8, but the claw portion 83 is integrally formed on the burner cover 8 by using the burner cover 8 as a die-cast product. Is also possible.

DESCRIPTION OF SYMBOLS 1 ... Combustor, 3 ... Burner body, 4 ... Burner cap, 42 ... Annular wall, 43 ... Flame port, 45 ... Recessed hole, 451 ... Projection part, 8 ... Burner cover, 81 ... Outer cylinder part, 83 ... Claw part , 831 ... Notch, 832 ... Projection, 832a ... Lower side of the protrusion.

Claims (2)

An annular burner cap placed on the burner body is provided, and an annular wall that abuts the other is provided on one of the outer peripheral portion of the upper surface of the burner body and the outer peripheral portion of the lower surface of the burner cap. A stove burner that forms a plurality of flares at intervals in the direction,
An annular burner cover that covers the upper surface of the burner cap with a gap in the vertical direction is provided, and an outer peripheral cylindrical portion that closes the gap between the burner cap and the burner cover over the entire circumference is provided on the outer peripheral edge of the burner cover. A claw portion that is formed on the lower surface portion radially inward of the outer peripheral edge portion of the burner cover is provided and a claw portion is formed on the upper surface of the burner cap.
The claw portion has an inverted V-shaped notch portion at the lower edge portion, and the concave hole has an inverted V-shaped projection portion whose apex angle is obtuse than the apex angle of the notch portion at the bottom portion, A combo burner characterized in that when the claw portion is inserted into the concave hole, the notch portion is expanded outward by the biting of the projection portion, and both side edges of the claw portion are pressed against the hole wall surface of the concave hole. . The claw portion has a protruding portion that protrudes outward at both side edge portions to a position where it presses against the hole wall surface of the concave hole, and the lower side of the protruding portion is inclined upward toward the outside. The stove burner according to claim 1, characterized in that:

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