JP2023014482A - Cooking stove burner - Google Patents

Abstract

To prevent an annular burner cover 7 for covering an upper surface of a burner cap 3 from being removed from the burner cap 3 without fail in a cooking stove burner including the burner cover 7.SOLUTION: A cooking stove burner includes: clip parts 8 each having a cylindrical part 81, into which an upper part of a protruding part 34 protruding on an upper surface of a burner cap 3 is inserted, and an outward bending flange part 82 at a lower end of the cylindrical part 81; and connection pieces 74 each of which has a through hole 74a into which the cylindrical part 81 may be inserted, may contact with the outward bending flange part 82 from above, and is fixed to a burner cover 7. The cylindrical part 81 is divided into multiple portions in a circumferential direction by slits at multiple positions in the circumferential direction. A bending part 85 bending to the radial inner side is provided at an upper end of each divided portion 84. The clip 8 is pushed down with the connection piece 74 placed in contact with the outward bending flange part 82 to cause a tip of each bending part 85 to contact with an outer peripheral surface of the protruding part 34 and deflect the divided portions 84 upward so as to incline to the radial outer side. The action prevents the connection piece 74 from being removed in an upward direction.SELECTED DRAWING: Figure 4

Description

The present invention comprises an annular burner cap placed on a burner body, and an annular wall protruding from 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. The present invention relates to a stove burner in which a plurality of flame ports are formed on a wall at intervals in the circumferential direction.

Conventionally, as this type of stove burner, there is known one that includes an annular burner cover that covers the upper surface of the burner cap with a gap in the vertical direction in order to prevent boiled spills from falling directly onto the upper surface of the burner cap. (See Patent Document 1, for example). In this burner cover, a claw portion vertically provided on the burner cover is press-fitted from above into a recess formed in the upper surface of the burner cap to prevent the burner cover from being easily removed from the burner cap, thereby preventing the burner cover from being forgotten or lost. I am making it possible.

By the way, a burner cap is generally made of an aluminum alloy or brass having good thermal conductivity, and a burner cover, which is also an appearance part, is made of stainless steel or an enamel-processed iron plate. Therefore, the thermal expansion coefficient of the burner cap is larger than that of the burner cover. When the burner cap and the burner cover are heated during burner combustion, the concave hole of the burner cap expands from the claw portion of the burner cover so that the claw portion can easily come out of the concave hole, and the burner cover is separated from the burner cap. Sometimes I end up

JP 2016-109343 A

SUMMARY OF THE INVENTION An object of the present invention is to provide a stove burner that can reliably prevent the burner cover from coming off the burner cap.

In order to solve the above problems, the present invention includes an annular burner cap placed on a burner body, and an annular wall abutting against one of the upper outer peripheral portion of the burner body and the lower outer peripheral portion of the burner cap. and a plurality of flame holes 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 vertical gaps. , a plurality of clips having a plurality of projections protruding from the upper surface of the burner cap, a tubular portion that can be externally inserted on the upper portion of each projection, and an outwardly bent flange portion at the lower end of the tubular portion and a plurality of connections fixed to the burner cover provided on the underside of the burner cover, which have through holes through which the tubular portion of each clip can be inserted, and can abut against the outwardly bent flange portion of each clip from above. The tubular portion of each clip is divided into a plurality of portions in the circumferential direction by slits at a plurality of locations in the circumferential direction, and the upper ends of the plurality of divided portions of the tubular portion are provided with bent portions that bend inward in the radial direction. , the diameter of the circle inscribed at the tip of each bent portion is smaller than the diameter of each convex portion, and by pressing down each clip by bringing each connecting piece into contact with the outwardly bent flange portion of each clip, the tip of each bent portion is Abutting on the outer peripheral surface of each convex part, the plurality of divided parts of the cylindrical part are flexed so as to tilt upward in the radial direction, respectively, so that each connecting piece is prevented from coming off upward. characterized by

According to the present invention, the connecting piece is prevented from coming off upward by the bending of each divided portion of the tubular portion of the clip, and when a lifting force acts on the connecting piece, each divided portion of the tubular portion of the clip is separated from the connecting piece. A radially inward force acts on each bent portion through the portion, and the tip of each bent portion bites into the outer peripheral surface of the convex portion, thereby preventing the clip from coming off upward from the convex portion. Therefore, even if there is a difference in coefficient of thermal expansion between the burner cap and the burner cover, it is possible to reliably prevent the burner cover from coming off the burner cap.

Moreover, in the present invention, it is desirable that a chamfered portion whose diameter decreases upward is formed at the upper end portion of the outer peripheral surface of each convex portion. According to this, when the connecting piece is brought into contact with the outwardly bent flange portion of the clip and pushed down, the bent portion is guided by the chamfered portion and is smoothly expanded radially outward, thereby improving the workability of assembling the burner cover. improves.

By the way, in order to prevent boiled spills that have fallen on the burner cover from going around the outer or inner peripheral edge of the burner cover to the lower surface of the burner cover and falling on the upper surface of the burner cap, the outer peripheral edge of the burner cover and the inner A tubular portion extending downward may be provided vertically on at least one of the peripheral portion. In this case, it is desirable that the tongue portion is bent so as to protrude radially from the lower end of the tubular portion, and that tongue portion constitutes the connecting piece. According to this, unlike the case where a connecting piece separate from the burner cover is attached to the burner cover, it is possible to reduce the number of parts and reduce the cost, which is advantageous.

The perspective view of the stove burner of embodiment of this invention. The cutting side view of the stove burner of embodiment. The perspective view of the separated state of the burner cap, clip, and burner cover of the stove burner of embodiment. (a), (b), and (c) are cross-sectional views of essential parts showing the work procedure for attaching the burner cover.

1 and 2, the stove burner of the embodiment of the present invention comprises a burner body 2 extending upward from the downstream end of a mixing tube 1 and an annular burner cap 3 mounted on the burner body 2. It has The stove burner includes a pan bottom temperature sensor 4 projecting upward through a central space surrounded by the burner cap 3, an ignition electrode 5 facing a target portion 3a projecting from one location around the burner cap 3, and a flame detector. A thermocouple 6 for is attached.

The burner body 2 is made of sheet metal and is integrated with the mixing tube 1 . Also, the burner body 2 is formed in a double cylindrical shape having an inner cylinder 21 and an outer cylinder 22 . Inwardly bent flange portions 21a and 22a are formed at the upper ends of the inner cylinder 21 and the outer cylinder 22, respectively.

The burner cap 3 is made of an aluminum alloy or brass, and has a cylindrical sealing portion 31 that fits inside the inwardly bent flange portion 21 a at the upper end of the inner cylinder 21 of the burner body 2 . An annular wall 32 protrudes from the outer periphery of the lower surface of the burner cap 3 and contacts the inwardly bent flange portion 22a at the upper end of the outer cylinder 22, which is the outer periphery of the upper surface of the burner body 2. As shown in FIG. The annular wall 32 is formed with a plurality of flame ports 33 formed of grooves spaced apart in the circumferential direction. mixed gas) is ejected from these flame ports 33 and burned. It is also possible to project an annular wall on the outer periphery of the upper surface of the burner body 2 so as to abut on the outer periphery of the lower surface of the burner cap 3 to form a flame port.

Further, the stove burner is provided with an annular burner cover 7 covering the upper surface of the burner cap 3 with a gap in the vertical direction in order to prevent boiled spills from falling directly onto the upper surface of the burner cap 3. - 特許庁The burner cover 7 is made of stainless steel or an enamel-treated iron plate in order to improve its appearance. Cylindrical portions 71 and 72 extending downward are vertically provided on the outer peripheral edge and the inner peripheral edge of the burner cover 7, respectively. The cylindrical portions 71 and 72 can prevent boiled spills that have fallen on the burner cover 7 from going around the lower surface of the burner cover 7 from the outer peripheral edge or the inner peripheral edge of the burner cover 7 and falling on the upper surface of the burner cap 3. I'm trying At the same circumferential location as the ignition electrode 5 on the outer peripheral edge of the burner cover 7, instead of the cylindrical portion 71, a canopy portion 73 covering the ignition electrode 5 from above is provided so as to protrude radially outward. ing.

3 and 4, on the upper surface of the burner cap 3, two protrusions 34, 34 are provided so as to be separated from each other by a half circumference. A chamfered portion 34 a whose diameter is reduced upward is formed at the upper end portion of the outer peripheral surface of each convex portion 34 . Two clips 8, 8 and two connecting pieces 74, 74 fixed to the burner cover 7 provided on the lower side of the burner cover 7 correspond to the two protrusions 34, 34. is provided. In FIG. 3, the burner cap 3 and the clip 8 are shown in a perspective view seen obliquely from above, and the burner cover 7 is shown in a perspective view seen obliquely from below.

Each clip 8 is made of stainless steel and has a cylindrical portion 81 that can be externally inserted onto the upper portion of each convex portion 34 and an outwardly bent flange portion 82 at the lower end of the cylindrical portion 81 . The tubular portion 81 is divided into a plurality of portions in the circumferential direction by slits 83 at a plurality of locations in the circumferential direction. Further, inwardly bent portions 85 are provided at the upper ends of the plurality of divided portions 84 of the cylindrical portion 81 . The diameter of the circles inscribed at the ends of the bent portions 85 of the plurality of divided portions 84 is made smaller than the diameter of each convex portion 34 (diameter below the chamfered portion 34a).

Of the two connecting pieces 74, 74, the one provided at the same circumferential position as the eaves portion 73 is bent so as to protrude radially from the lower end of the cylindrical portion 72 on the inner peripheral edge of the burner cover 7. The tongue portion 72a is composed of a tongue portion 72a, and the other portion is composed of a tongue portion 71a bent so as to protrude radially from the lower end of a cylindrical portion 71 on the outer peripheral edge of the burner cover 7. As shown in FIG. Each connecting piece 74 is formed with a through hole 74a through which the cylindrical portion 81 of each clip 8 can be inserted. By inserting the cylindrical portion 81 of each clip 8 into the through hole 74a, each connecting piece 74 can be brought into contact with the outwardly bent flange portion 82 of each clip 8 from above.

When attaching the burner cover 7, first, as shown in FIG. Next, as shown in FIG. 4B, each connecting piece 74 is brought into contact with the outwardly bent flange portion 82 of each clip 8 from above, and each clip 8 is pushed down by pushing down the burner cover 7 in this state. As a result, as shown in FIG. 4(c), the tip of each bent portion 85 of each clip 8 abuts against the outer peripheral surface of each convex portion 34, and the plurality of divided portions 84 of the cylindrical portion 81 are directed upward. The burner cover 7 is fixed on the burner cap 3 by flexing so as to incline radially outward by pressing, and each connecting piece 74 is prevented from coming off upward. Further, when a lifting force acts on each connecting piece 74 , a radially inward force acts on each bent portion 85 from each connecting piece 74 via each divided portion 84 of the cylindrical portion 81 of each clip 8 . Thus, the tip of each bent portion 85 bites into the outer peripheral surface of each convex portion 34 . As a result, each clip 8 is prevented from coming off upward from each protrusion 34 . Therefore, even if there is a difference in coefficient of thermal expansion between the burner cap 3 and the burner cover 7, the burner cover 7 can be reliably prevented from coming off the burner cap 3.

Further, if the chamfered portion 34a is formed on the upper end portion of the outer peripheral surface of each convex portion 34 as in the present embodiment, each connecting piece 74 is brought into contact with the outwardly bent flange portion 82 of each clip 8 and pushed down. In addition, the bent portion 85 is guided by the chamfered portion 34a and is smoothly expanded radially outward, so that the workability of assembling the burner cover 7 is improved.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, in the above embodiment, the number of connecting pieces 74 is two, but the number may be three or more. It is also possible to bend all the connecting pieces 74 at the lower end of one of the cylindrical portion 71 on the outer peripheral edge and the cylindrical portion 72 on the inner peripheral edge of the burner cover 7 . Furthermore, it is also possible to attach a separate connecting piece 74 to the burner cover 7 by welding or the like. However, according to the above embodiment, since the connecting piece 74 is formed integrally with the burner cover 7, it is possible to reduce the number of parts and reduce the cost, which is advantageous.

2... Burner body 3... Burner cap 32... Annular wall 33... Flare port 34... Protruding part 34a... Chamfered part 7... Burner cover 71, 72... Cylindrical part 71a, 72a... Tongue part, 74... Connecting piece, 74a... Through hole, 8... Clip, 81... Cylindrical part, 82... Outward bending flange part, 83... Slit, 84... Separating part, 85... Bending part.

Claims (3)

An annular burner cap placed on the burner body is provided, and an annular wall is protruded from 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 and is in contact with the other. A stove burner in which a plurality of flame holes are formed at intervals in the direction, and which is provided with an annular burner cover that covers the upper surface of the burner cap with a gap in the vertical direction,
a plurality of clips having a plurality of protrusions protruding from the upper surface of the burner cap, a tubular portion that can be externally inserted on the upper portion of each protrusion, and an outwardly bent flange portion at the lower end of the tubular portion; a plurality of connecting pieces fixed to the burner cover provided on the underside of the burner cover and having a through hole through which the cylindrical portion can be inserted, and capable of coming into contact with the outwardly bent flange portion of each clip from above;
The tubular portion of each clip is divided into a plurality of portions in the circumferential direction by slits at a plurality of locations in the circumferential direction. The diameter of the circle inscribed at the tip is smaller than the diameter of each projection. A stove characterized by contacting a surface and flexing so that a plurality of divided portions of a cylindrical portion are inclined upward in a radial direction, respectively, so that each connecting piece is prevented from coming off upward. burner. 2. The stove burner according to claim 1, wherein a chamfered portion whose diameter decreases upward is formed at the upper end portion of the outer peripheral surface of each of the projections. 3. The stove burner according to claim 1, wherein a cylindrical portion extending downward is vertically provided on at least one of the outer peripheral edge and the inner peripheral edge of the burner cover, wherein the cylindrical portion extends radially from the lower end of the cylindrical portion. A stove burner characterized in that said connection piece is constituted by a tongue piece bent so as to protrude.

Images