Cooker burner

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

[Technical Field]

[0001] The present invention relates to a stove burner that has an annular burner cap placed on a burner body, and has a protruding annular wall that abuts on one of the outer periphery of the upper surface of the burner body and the outer periphery of the lower surface of the burner cap, and has multiple flame ports formed in the annular wall at circumferential intervals. [Background technology]

[0002] Conventionally, a known stove burner of this type is equipped with a ring-shaped burner cover that covers the top surface of the burner cap with a vertical gap to prevent boil-over from directly falling onto the top surface of the burner cap (see, for example, Patent Document 1). In this type, claws attached vertically to the burner cover are pressed from above into recesses formed in the top surface of the burner cap, making it difficult to remove the burner cover from the burner cap and preventing the burner cover from being forgotten or lost.

[0003] Burner caps are generally made of aluminum alloys or brass, which have good thermal conductivity, while burner covers, which are also exterior components, are made of stainless steel or enameled iron plates. Therefore, the burner cap has a higher thermal expansion coefficient than the burner cover. When the burner cap and burner cover are heated during burner combustion, the recesses in the burner cap expand more than the claws in the burner cover, making it easier for the claws to slip out of the recesses, which can cause the burner cover to come off the burner cap. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-109343 Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above, 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. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a stove burner comprising an annular burner cap placed on a burner body, a protruding annular wall that abuts on one of the outer periphery of the upper surface of the burner body and the outer periphery of the lower surface of the burner cap, and a plurality of flame ports formed at intervals in the circumferential direction on this annular wall, and an annular burner cover that covers the upper surface of the burner cap with gaps in the vertical direction, the burner cover comprising a plurality of protrusions protruding from the upper surface of the burner cap, a plurality of clips each having a cylindrical portion that can be fitted onto the top of each protrusion and an outwardly bent flange portion at the lower end of the cylindrical portion, and a through hole through which the cylindrical portion of each clip can be inserted, and the outwardly bent flange of each clip and a plurality of connecting pieces fixed to the burner cover provided on the underside of the burner cover that can abut against the burner cover portion from above, the cylindrical portion of each clip is divided into a plurality of parts in the circumferential direction by a plurality of slits in the circumferential direction, and radially inward bent parts are provided at the upper ends of the plurality of divided parts of the cylindrical portion, the diameter of the circle inscribed at the tip of these bent parts is smaller than the diameter of each convex part, and by abutting each connecting piece against the outward bent flange part of each clip and pressing down each clip, the tip of each bent part abuts against the outer peripheral surface of each convex part, and the plurality of divided parts of the cylindrical portion are each bent so as to be inclined radially outward toward the top, and each connecting piece is prevented from coming off upward.

[0007] According to the present invention, the bending of each divided portion of the tubular portion of the clip prevents the connecting piece from coming off upward, and when a pulling force is applied to the connecting piece, a force acts radially inward from the connecting piece through each divided portion of the tubular portion of the clip to each bent portion, causing the tip of each bent portion to bite into the outer peripheral surface of the convex portion, preventing the clip from coming off upward relative to the convex portion. Therefore, even if there is a difference in the thermal expansion coefficient between the burner cap and the burner cover, it is possible to reliably prevent the burner cover from coming off the burner cap.

[0008] In addition, in the present invention, it is desirable that the upper end of the outer peripheral surface of each protrusion be formed with a chamfered portion that tapers upward, so that when the connecting piece is pressed down against the outwardly bent flange of the clip, the bent portion is guided by the chamfered portion and smoothly spread outward in the radial direction, improving the ease of assembling the burner cover.

[0009] In order to prevent boil-over liquid that falls onto the burner cover from flowing around the outer or inner periphery of the burner cover to the underside of the burner cover and onto the upper surface of the burner cap, a downwardly extending cylindrical portion may be attached to at least one of the outer or inner periphery of the burner cover. In this case, it is desirable to form a tongue portion that extends radially from the lower end of the cylindrical portion, and to use this tongue portion to form the connecting piece. This is advantageous in that it reduces the number of parts and reduces costs, unlike a system in which a connecting piece separate from the burner cover is attached to the burner cover. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view of a stove burner according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional side view of the stove burner according to the embodiment. [Figure 3] 1 is a perspective view of the burner cap, clip, and burner cover of the stove burner of the embodiment in a separated state. FIG. [Figure 4] (a) (b) (c) Cross-sectional views of the main parts showing the procedure for installing the burner cover. DETAILED DESCRIPTION OF THE INVENTION

[0011] 1 and 2, the stove burner according to 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 placed on the burner body 2. The stove burner is equipped with a pot bottom temperature sensor 4 that protrudes upward through the central space surrounded by the burner cap 3, an ignition electrode 5 that faces a target portion 3a that protrudes from one location around the periphery of the burner cap 3, and a thermocouple 6 for flame detection.

[0012] The burner body 2 is made of sheet metal and is integral with the mixing tube 1. The burner body 2 is formed in a double cylindrical shape having an inner cylinder 21 and an outer cylinder 22. Inner bent flange portions 21a and 22a are formed at the upper ends of the inner cylinder 21 and the outer cylinder 22, respectively.

[0013] The burner cap 3 is made of aluminum alloy or brass, and has a sealing cylinder 31 that hangs down from its inner periphery and fits into the inwardly bent flange 21a 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 abuts against the inwardly bent flange 22a at the upper end of the outer cylinder 22, which forms the outer periphery of the upper surface of the burner body 2. A plurality of flame ports 33 consisting of grooves are formed in this annular wall 32 at circumferential intervals, so that the mixed gas (mixture of fuel gas and primary air) supplied from the mixing tube 1 into the burner body 2 is ejected from these flame ports 33 and combusted. It is also possible to form a flame port in a protruding annular wall that abuts against the outer periphery of the lower surface of the burner cap 3 at the outer periphery of the upper surface of the burner body 2.

[0014] The stove burner also includes an annular burner cover 7 that covers the top of the burner cap 3 with a vertical gap to prevent overflow from directly falling onto the top of the burner cap 3. The burner cover 7 is made of stainless steel or enameled iron plate for a stylish appearance. Cylindrical sections 71 and 72 that extend downward are attached to the outer and inner edges of the burner cover 7, respectively. These cylindrical sections 71 and 72 prevent overflow from falling onto the top of the burner cap 3, from flowing around the outer or inner edges of the burner cover 7 to the underside of the burner cover 7. In place of the cylindrical section 71, a visor section 73 that covers the ignition electrode 5 from above is provided on the outer edge of the burner cover 7 at the same circumferential location as the ignition electrode 5, extending radially outward.

[0015] 3 and 4, two protrusions 34, 34 are provided on the upper surface of the burner cap 3, positioned halfway around the circumference. A chamfered portion 34a that decreases in diameter toward the top is formed at the upper end of the outer peripheral surface of each protrusion 34. In addition, two clips 8, 8 and two connecting pieces 74, 74 fixed to the burner cover 7 provided on the underside of the burner cover 7 are provided corresponding to the two protrusions 34, 34. In FIG. 3, the burner cap 3 and 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.

[0016] Each clip 8 is made of stainless steel and has a cylindrical portion 81 that can be fitted onto the top of each protrusion 34, and an outwardly bent flange portion 82 at the lower end of the cylindrical portion 81. The cylindrical portion 81 is divided into multiple parts in the circumferential direction by multiple slits 83 in the circumferential direction. Furthermore, inwardly bent portions 85 are provided at the upper ends of the multiple divided portions 84 of the cylindrical portion 81. The diameter of a circle inscribed at the tips of the bent portions 85 of the multiple divided portions 84 is smaller than the diameter of each protrusion 34 (the diameter below the chamfered portion 34a).

[0017] Of the two connecting pieces 74, 74, the one located at the same circumferential position as the eaves portion 73 is composed of a tongue portion 72a bent so as to project radially from the lower end of the cylindrical portion 72 on the inner peripheral edge of the burner cover 7, and the other is composed of a tongue portion 71a bent so as to project radially from the lower end of the cylindrical portion 71 on the outer peripheral edge of the burner cover 7. Each connecting piece 74 is formed with a through hole 74a through which the cylindrical portion 81 of each clip 8 can be inserted. Then, by inserting the cylindrical portion 81 of each clip 8 into the through hole 74a, each connecting piece 74 can abut against the outwardly bent flange portion 82 of each clip 8 from above.

[0018] When attaching the burner cover 7, first, as shown in Fig. 4(a), each clip 8 is set with the cylindrical portion 81 fitted over the top of each protrusion 34. Next, as shown in Fig. 4(b), each connecting piece 74 is brought into contact with the outwardly bent flange portion 82 of each clip 8 from above, and in this state, the burner cover 7 is pushed down to push down each clip 8. As a result, as shown in Fig. 4(c), the tip of each bent portion 85 of each clip 8 abuts against the outer circumferential surface of each protrusion 34, and each of the multiple divided portions 84 of the cylindrical portion 81 is bent so as to incline radially outward toward the top, preventing each connecting piece 74 from coming off upward, and fixing the burner cover 7 to the burner cap 3. Furthermore, when a pulling force is applied to each connecting piece 74, a force acts radially inward from each connecting piece 74 to each bent portion 85 via each divided portion 84 of the tubular portion 81 of each clip 8, causing the tip of each bent portion 85 to bite into the outer peripheral surface of each protrusion 34. This prevents each clip 8 from coming off upward relative to each protrusion 34. Therefore, even if there is a difference in the thermal expansion coefficient between the burner cap 3 and the burner cover 7, it is possible to reliably prevent the burner cover 7 from coming off the burner cap 3.

[0019] Furthermore, as in this embodiment, if a chamfered portion 34a is formed at the upper end of the outer peripheral surface of each convex portion 34, when each connecting piece 74 is abutted against the outward bent flange portion 82 of each clip 8 and pushed down, the bent portion 85 is guided by the chamfered portion 34a and smoothly pushed outward in the radial direction, improving the ease of assembly of the burner cover 7.

[0020] 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 it may be three or more. It is also possible to bend all of the connecting pieces 74 to the lower end of one of the cylindrical portions 71 on the outer periphery and the cylindrical portion 72 on the inner periphery of the burner cover 7. Furthermore, it is also possible to attach connecting pieces 74 that are separate from the burner cover 7 by welding or the like. However, according to the above embodiment, since the connecting pieces 74 are molded integrally with the burner cover 7, the number of parts can be reduced, thereby advantageously reducing costs. [Explanation of symbols]

[0021] 2...burner body, 3...burner cap, 32...annular wall, 33...flame port, 34...convex portion, 34a...chamfered portion, 7...burner cover, 71, 72...cylindrical portion, 71a, 72a...tongue portion, 74...connecting piece, 74a...through hole, 8...clip, 81...cylindrical portion, 82...outward bent flange portion, 83...slit, 84...separated portion, 85...bent portion.

Claims

1. A stove burner is provided with an annular burner cap placed on a burner body, and an annular wall is provided on one of the outer periphery of the upper surface of the burner body and the outer periphery of the lower surface of the burner cap, which abuts against the other, and a plurality of flame ports are formed on the annular wall at intervals in the circumferential direction, and the stove burner is provided with an annular burner cover that covers the upper surface of the burner cap with vertical gaps, a plurality of clips each having a plurality of protrusions protruding from an upper surface of the burner cap, a cylindrical portion capable of being inserted onto the upper portion of each of the protrusions, and an outwardly bent flange portion at the lower end of the cylindrical portion; and a plurality of connecting pieces fixed to the burner cover provided on the underside of the burner cover, each of the connecting pieces having a through hole through which the cylindrical portion of each clip can be inserted and capable of abutting from above against the outwardly bent flange portion of each clip, A stove burner characterized in that the cylindrical portion of each clip is divided into multiple circumferential portions by multiple circumferential slits, radially inward bent portions are provided at the upper ends of the multiple divided portions of the cylindrical portion, the diameter of the circle inscribed in the tips of these bent portions is smaller than the diameter of each convex portion, and by abutting each connecting piece with the outward bent flange portion of each clip and pushing each clip down, the tip of each bent portion abuts against the outer peripheral surface of each convex portion, and each of the multiple divided portions of the cylindrical portion is bent so as to incline radially outward toward the top, and each connecting piece is prevented from slipping out upward.

2. 2. A stove burner according to claim 1, characterized in that a chamfered portion is formed on the upper end of the outer circumferential surface of each of said protrusions, the diameter of which decreases toward the top.

3. A stove burner as described in claim 1 or 2, in which a cylindrical portion extending downward is vertically attached to at least one of the outer peripheral edge and the inner peripheral edge of the burner cover, and the connecting piece is formed by a tongue portion bent so as to protrude radially from the lower end of the cylindrical portion.

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