JP2021032516A - Manufacturing method of cooking stove burner - Google Patents

Abstract

To manufacture a cooking stove burner which makes welding marks, made when an upper plate part and a lower plate part are welded to form a cap, less visible.SOLUTION: A manufacturing method of a cooking stove burner is a manufacturing method of a gas burner 6 having a burner head 20 including a burner head body 30 and a cap 40 which includes an upper plate part 41 and a lower plate part 42 to be welded to each other and is fixed onto the burner head body 30. The manufacturing method of the cooking stove burner includes: a first step in which barrel polishing is performed to the upper plate part 41; and a second step in which the upper plate part 41 and the lower plate part 42 are welded.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a method for manufacturing a stove burner.

The gas burner of the gas stove disclosed in Patent Document 1 includes a burner cap constituting the head of the gas burner. The burner cap includes an annular burner cap main body and a protective cap fixed on the burner cap main body, and these are assembled to each other to form an annular shape as a whole. The protective cap has a cover member that covers the burner cap main body, and a metal plate material on which a plurality of engaged portions that engage with the burner cap main body are formed. The metal plate material is joined to the lower surface of the cover member by a known metal joining method such as welding.

JP-A-2015-31468

In the burner cap as described above, when the metal plate material and the cover member are joined by projection welding, for example, a large current is passed by contact-pressurizing the metal plate material and the cover member with electrodes so as to sandwich the metal plate material and the cover member. FIG. 12A is a photograph of a burner cap manufactured by projection welding taken from diagonally above. By performing projection welding as shown in FIG. 12A, welding marks are left on the cover member. Since the cover member is a part that comes into the user's field of view when the gas stove is viewed, there is a problem that welding marks are conspicuous and the appearance is spoiled.

Therefore, in order to solve at least one of the above-mentioned problems, a method of manufacturing a stove burner in which welding marks are inconspicuous when the upper plate portion and the lower plate portion are welded to form a cap is provided.

The method for manufacturing a stove burner, which is one of the disclosures, is described.
A method for manufacturing a stove burner having a burner head including a burner head main body, an upper plate portion and a lower plate portion welded to each other, and a cap fixed on the burner head main body.
The first step of barrel polishing the upper plate portion and
The second step of welding the upper plate portion and the lower plate portion, and
including.

According to the method for manufacturing a stove burner of the present disclosure, it is possible to manufacture a stove burner in which welding marks are inconspicuous when the upper plate portion and the lower plate portion are welded to form a cap.

FIG. 1 is a perspective view schematically illustrating the gas stove of the first embodiment. FIG. 2 is a perspective view exemplifying the burner head used for the gas stove of FIG. 1 as viewed from diagonally above. FIG. 3 is an exploded perspective view seen from diagonally above the burner head. FIG. 4 is a cross-sectional view illustrating a cross section in which the burner head is cut at a cut surface that passes through the central axis and passes through both first support portions. FIG. 5 is a perspective view seen from diagonally above the main body of the burner head. FIG. 6 is a perspective view seen from diagonally below the cap. FIG. 7 is an explanatory diagram illustrating a step of performing barrel polishing on the upper plate portion with respect to the cap manufacturing process. FIG. 8 is an explanatory diagram illustrating a step of welding the upper plate portion and the lower plate portion after the step of FIG. 7 with respect to the manufacturing process of the cap. FIG. 9 is an explanatory diagram illustrating a step of performing electrolytic polishing on the upper plate portion after the step of FIG. 8 regarding the manufacturing process of the cap. FIG. 10A is an explanatory view showing a state before the insertion portion is inserted into the recess in relation to the manufacturing process of the burner head, and FIG. 10B is an oblique view of only the cap before assembling to the burner head main body. It is a perspective view seen from the bottom. 11 (A) is an explanatory view showing a state in which the cap is relatively moved with respect to the burner head main body from the state of FIG. 10 (A) with respect to the manufacturing process of the burner head, and FIG. 11 (B) is FIG. 11 It is explanatory drawing which shows the state which performed the plastic deformation processing which bends each 1st locking piece from the state (A). FIG. 12A is a photograph of a burner cap manufactured by projection welding without barrel polishing, taken from diagonally above, and FIG. 12B is a photograph taken after barrel polishing. It is a photograph of a burner cap manufactured by welding taken from diagonally above.

Hereinafter, embodiments of the present disclosure will be listed and illustrated.

In the method for manufacturing a stove burner of the present disclosure, if the first step is performed so that the upper plate portion is subjected to barrel polishing, the upper surface of the upper plate portion can be finely scratched due to the barrel polishing. Therefore, the welding mark on the upper surface of the upper plate portion due to the welding in the second step is likely to be buried in the fine scratches caused by the barrel polishing, and is difficult to be recognized as the welding mark. Therefore, in the completed stove burner, the welding marks on the upper surface of the upper plate portion, which are easily visible to the user, are less noticeable, and the appearance is enhanced.

In the method for manufacturing a stove burner of the present disclosure, the upper plate portion and the lower plate portion may be welded by projection welding in the second step.

In this manufacturing method, since the upper plate portion and the lower plate portion are welded by projection welding, heat can be concentrated in a shorter time than in arc welding, etc., so that efficient and stable welding is performed. be able to. However, if projection welding is adopted, there is a concern that welding marks due to heat concentration in a narrow area will be conspicuous, but if the barrel polishing described above is adopted, such welding marks can be suppressed. .. That is, this manufacturing method is more useful because it can achieve both efficient and stable welding and improvement of aesthetics.

In the method for producing a stove burner of the present disclosure, a second step may be performed after the first step.

If barrel polishing is performed on this welded body after the upper plate portion and the lower plate portion are welded, an abrasive or the like may enter between the upper plate portion and the lower plate portion during the barrel polishing process. , There is a risk that the position shift may occur between the upper plate portion and the lower plate portion. However, if the upper plate portion and the lower plate portion are welded after barrel polishing is performed on the upper plate portion, the above problem is less likely to occur.

The method for manufacturing the stove burner of the present disclosure may include a third step of polishing the upper surface portion of the upper plate portion by a polishing method different from barrel polishing after the second step.

If the third step is performed so as to polish the upper surface portion of the upper plate portion by a polishing method different from the barrel polishing after the second step, the upper surface of the upper plate portion is glossed due to the third step. , The aesthetics are further enhanced. Moreover, in the above manufacturing method, since the upper surface in which the welding marks are buried in the scratches caused by the barrel polishing is polished, it is possible to give gloss in the form in which the welding marks are buried.

<First Embodiment>
Hereinafter, the first embodiment will be described with reference to the drawings.
1. 1. Outline of gas stove The gas stove 1 shown in FIG. 1 corresponds to an example of a stove, and is configured as a built-in stove incorporated in a cabinet (not shown in FIG. 1).

The gas stove 1 includes a stove body 1A in which a large number of parts are integrally formed. The stove main body 1A includes gas burners (stove burners) 4, 5, 6, a housing 2, a top plate 3, and the like.

In the following description, in the gas stove 1 shown in FIG. 1, the first direction among the plate surface directions of the plate-shaped top plate 3 (plane direction parallel to a predetermined flat surface forming the upper surface of the top plate 3). (In the example of FIG. 1, the lateral direction when the top plate 3 is viewed in a plane) is the front-rear direction. The second direction orthogonal to the first direction (in the example of FIG. 1, the longitudinal direction when the top plate 3 is viewed in a plane) is the left-right direction. Further, the direction orthogonal to the front-rear direction and the left-right direction is the vertical direction. In the example of FIG. 1, the vertical direction is the plate thickness direction of the top plate 3.

The housing 2 is mainly composed of, for example, a known metal material, constitutes an outer shell portion of the gas stove 1, and houses gas burners 4, 5, and 6 and other parts. The housing 2 is provided with a pair of side wall portions on both sides in the left-right direction, and a rear wall portion (not shown in FIG. 1) is provided so as to be connected to the rear end portions of these side wall portions. The front surface portion (not shown in FIG. 1) of the housing 2 is formed in a frame shape or a wall shape, and has, for example, a frame portion arranged so as to be bridged over the pair of side wall portions described above. Further, a bottom wall portion (not shown in FIG. 1) is connected to the front portion, the pair of side wall portions, and the lower portion of the rear wall portion. The housing 2 has a structure in which its own internal space is surrounded by these front portions, a pair of side wall portions, a rear wall portion, and a bottom wall portion, and has a box-like shape with an open upper portion.

The top plate 3 is fixed to the upper end portion of the housing 2, and is arranged on the housing 2 so as to partially close the opening at the upper end of the housing 2. The top plate 3 has a rectangular plate-like shape in a plan view, and has a configuration in which a plurality of openings (through holes) 4A, 5A, 6A for exposing the gas burners 4, 5, and 6 are formed.

The gas burners 4, 5 and 6 are provided so as to correspond to the openings 4A, 5A and 6A formed in the top plate 3, respectively. Specifically, the gas burner (right burner) 4 is provided so as to be inserted into the opening 4A formed at a position closer to the right end and closer to the front end of the top plate 3. Further, a gas burner (left burner) 5 is provided so as to be inserted into the opening 5A formed at a position closer to the left end and closer to the front end of the top plate 3. Further, a gas burner (back burner) 6 is provided so as to be inserted into the opening 6A formed on the back side of the center of the top plate 3. Further, a grill portion 8 is provided near the center of the housing 2. The grill portion 8 includes a box-shaped grill storage, a grill door 8B for opening and closing the grill storage, a grill burner configured as a gas burner and arranged in the grill storage (not shown in FIG. 1), and the like.

As shown in FIG. 1, two ignition buttons 11 and 14 (ignition operation unit) are provided near the right end of the front surface of the housing 2, and two other ignition buttons 12 and 13 are provided near the left end of the front surface of the housing 2. Is provided. The ignition button 11 is an operation button for performing an ignition operation and a fire extinguishing operation of the gas burner 4. The ignition button 12 is an operation button for performing an ignition operation and a fire extinguishing operation of the gas burner 5. The ignition button 13 is an operation button for performing an ignition operation and a fire extinguishing operation of the gas burner 6. The ignition button 14 is an operation button for performing an ignition operation and a fire extinguishing operation of the gas burner of the grill portion 8. The ignition buttons 11, 12, 13, and 14 are arranged so that they can be visually recognized from the front side and can be operated from the front side. Each of the ignition buttons 11, 12, 13, and 14 is configured to be displaceable to a protruding position protruding forward and a retracted position retracted to the rear side of the protruding position, and further, each ignition button 11, All of 12, 13 and 14 are configured to be rotatable.

Burner heads 10 constituting the heads of the gas burners 4 and 5, respectively, are arranged in the plurality of openings (through holes) 4A and 5A formed in the top plate 3. Similarly, the burner head 20 constituting the head of the gas burner 6 is arranged in the opening 6A. A metal trivet 7 is provided on the top plate 3 so as to surround the burner heads 10 and 20, respectively. The gas burners 4 and 5 have substantially the same configuration except that the size of the gas burners 6 is different from that of the gas burners 6, and the gas burners 6 will be described in detail below.

The gas burner 6 is provided with an air-fuel mixture chamber (not shown) in which a throat portion for sucking the fuel gas and the primary air is connected to mix the fuel gas and the primary air, and the burner main body 6B communicates with the air-fuel mixture chamber. It is connected. The burner head 20 is placed on the burner main body 6B. As shown in FIG. 2, the burner head 20 includes a burner head main body 30 in which a large number of flame holes 30e are formed on the outer periphery, and as shown in FIG. 1, in the vicinity of any of the flame holes 30e. An electrode 6C for ignition and a thermocouple (not shown) for flame detection are provided. As shown in FIG. 5, the plurality of flame holes 30e include a main flame hole 30f and a secondary flame hole 30k. The main flame hole 30f is a hole that forms a larger flame (main flame that greatly contributes to heating) than the secondary flame hole 30k. The secondary flame hole 30k is a hole smaller than the main flame hole 30f, and is a hole that forms a secondary flame (sleeve fire for holding the flame) by the transfer of fire from the main flame. Although only the symbols of some of the flame holes 30e are shown in FIGS. 2 and 5, a large number of flame holes 30e are formed over the entire circumferential direction of the burner head main body 30. Further, the temperature sensor 9 is arranged so as to penetrate the center of the burner main body 6B and the burner head 20. The temperature sensor 9 comes into contact with the bottom of a cooking utensil (cooking pot or the like) placed on the trivet 7 and functions to detect the temperature at the bottom of the cooking utensil.

When the ignition button 13 is ignited, fuel gas is supplied to the burner main body 6B together with the primary air through the air-fuel mixture chamber (not shown), and the burner head 20 is placed on the burner main body 6B as an air-fuel mixture. It flows out from a large number of flame holes 30e. Then, a controller (not shown) provided inside the stove body 1A sparks the electrode 6C of the burner head 20 and ignites the air-fuel mixture to generate a flame around the burner head 20. As a result, the bottom of the cooking utensil placed on the trivet 7 around the burner head 20 can be heated, and cooking can be performed.

2. Detailed configuration of the burner head Next, the detailed configuration of the burner head 20 will be described.
As shown in FIGS. 2 to 4, the burner head 20 includes an annular burner head main body 30 and a cap 40 fixed on the burner head main body 30, which are assembled to each other and are annular as a whole. It is configured in. The cap 40 arranged on the upper side is configured as a circular annular plate, and the burner head main body 30 arranged on the lower side has a tubular structure. Hereinafter, the specific configurations of the burner head main body 30 and the cap 40 will be described in detail.

First, the configuration of the burner head main body 30 will be described in detail.
The burner head main body 30 shown in FIG. 5 is made of a metal material such as aluminum die casting, is located below the cap 40, and has a function of supporting the lower surface portion of the cap 40. As shown in FIGS. 3 to 5, the burner head main body 30 includes a cylindrical portion 30a formed in a cylindrical shape and an annular portion 30b projecting in a flange shape on the upper end side of the cylindrical portion 30a. ..

The cylindrical portion 30a is formed in a cylindrical shape so that the central axis G is the center of the cylinder, and extends along the central axis G. The inner peripheral surface of the cylindrical portion 30a is configured as a cylindrical surface centered on the central axis G or an annular surface along the cylindrical surface centered on the central axis G. The outer peripheral surface of the cylindrical portion 30a is also configured as a cylindrical surface centered on the central axis G or an annular surface along the cylindrical surface centered on the central axis G. The annular portion 30b is configured as a flange portion that is connected to the upper end portion of the cylindrical portion 30a and projects from the upper end portion to the outside in the radial direction about the central axis G. The annular portion 30b is provided with an upper surface portion 30c. The upper surface portion 30c is a portion constituting the upper plate surface of the annular portion 30b (flange portion), and is arranged at a distance from the plate portions (upper plate portion 41 and lower plate portion 42) of the cap 40 and is lower. It is a portion that constitutes an annular facing surface (upper surface) that faces the lower surface of the plate portion 42 at a distance. The surface of the upper surface portion 30c (the facing surface) is an annular surface along a virtual plane orthogonal to the central axis G.

A through hole 30d extending vertically is formed in the central portion of the burner head main body 30, and gas can pass in the vertical direction so as to pass through the through hole 30d. Hereinafter, the specific configurations of the burner head main body 30 and the cap 40 will be described in detail.

As shown in FIG. 5, in the burner head main body 30, a large number of the above-mentioned flame holes 30e are formed on the lower surface of the annular portion 30b over the entire circumferential direction. Further, on the lower surface portion of the annular portion 30b, a protrusion 30g is formed so as to project downward from the vicinity of the outer edge portion of the annular portion 30b. In this configuration, the burner head body 30 is placed on the burner body 6B while the protrusion 30 g is inserted into a notch (not shown) formed in the burner body 6B, so that the burner head body 30 is placed on the burner body 6B. It is positioned at. In addition, most of the outer peripheral edge of the annular portion 30b has a circular shape in a plan view, and a part of the outer peripheral edge portion extends outward from the outer edge portion which has a circular shape when viewed in a plan view. A protruding portion 30h is formed. The extending portion 30h is a portion facing the electrode 6C shown in FIG.

As shown in FIG. 5, in the annular portion 30b of the burner head main body 30, on the upper surface portion 30c side arranged to face the cap 40, the cap 40 is engaged with the cap 40 at a plurality of positions in the circumferential direction of the burner head main body 30. The matching first support portions 31, 32 and the second support portions 33, 34 are provided. The upper surface portion 30c is formed in an annular shape with the central axis G (see FIGS. 4 and 10 (A)) as the center. The first support portions 31, 32 and the second support portions 33, 34 all project axially upward (on the cap 40 side) from the upper surface portion 30c of the annular portion 30b. As shown in FIG. 5, the first support portions 31, 32 and the second support portions 33, 34 have a central axis G of the through hole 30d (that is, the central axis of the cylindrical surface forming the inner surface of the cylindrical portion 30a). They are lined up in the circumferential direction around the center.

Further, as shown in FIG. 5, in the annular portion 30b, the flat surface portion 30i whose upper surface is formed as an annular flat surface is arranged in an annular shape along the outer peripheral edge in the vicinity of the outer peripheral edge of the annular portion 30b. .. On the center side of the flat surface portion 30i, a tapered (mortar-shaped) portion 30j that becomes lower as the outer surface approaches the central axis G is arranged in an annular shape. The first support portions 31, 32 and the second support portions 33, 34 all project from positions straddling the flat surface portion 30i and the tapered portion 30j, respectively. The first support portion 31 and the second support portions 33, 34 have a truncated cone shape. Further, the first support portion 32 projects inward (on the central axis G side) as compared with the first support portion 31.

As shown in FIGS. 4 and 10A, the first support portions 31 and 32 are arranged so as to face each other with the central axis G interposed therebetween. The diameters of the first support portions 31 and 32 are larger than those of the second support portions 33 and 34. The first support portions 31 and 32 have recesses 31a and 32a formed on the outer peripheral surface on the central axis G side (the other first support portion side), respectively. Each of these recesses 31a and 32a is configured as a groove along the circumferential direction (circumferential direction centered on the central axis G). The recesses 31a and 32a are formed near the center positions in the vertical direction of the first support portions 31 and 32, respectively. More specifically, the recess 31a is configured to be recessed toward the inner side (center axis G side) side of the outer peripheral surface of the first support portion 31 toward the side away from the central axis G. More specifically, the recess 31a is configured as a notch in the direction orthogonal to the central axis G and along the virtual plane passing through the recess 31a. Similarly, the recess 32a is configured to be recessed toward the inside (center axis G side) side of the outer peripheral surface of the first support portion 32 toward the side away from the center axis G. More specifically, the recess 32a is configured as a notch in the direction orthogonal to the central axis G and along the virtual plane passing through the recess 32a. If the member has a thickness smaller than the vertical width of the recesses 31a and 32a (the vertical width of the recess), the recess is formed between one end side in the circumferential direction and the other end side in the circumferential direction of the first support portions 31 and 32. It is possible to move relative to each other in the circumferential direction so as to pass through 31a and 32a. In this configuration, with the insertion portion 51b described later inserted into the recess 31a, the first regulation portion 51 is restricted from moving relative to the first support portion 31 in the direction of the central axis G. It has become. Similarly, with the insertion portion 52b described later inserted into the recess 32a, the first regulation portion 52 is restricted from moving relative to the first support portion 32 in the direction of the central axis G. ing.

As shown in FIG. 10A, the second support portions 33 and 34 are located at positions away from the first support portions 31 and 32 in the circumferential direction centered on the central axis G and from the first support portions 31 and 32. Is also arranged inside (on the G side of the central axis). That is, the second support portions 33 and 34 are located inside the circle C passing through the outermost side (base end portion on the opposite side of the central axis G) of the first support portions 31 and 32 with the central axis G as the center. ing. The shortest distance from the central axis G to the second support portions 33 and 34 is smaller than any of the shortest distances from the central axis G to the first support portions 31 and 32. In addition, in FIG. 10A, only a part of the circle C (the part on the first support portion 31 side) is shown.

Further, as shown in FIG. 10A, the second support portions 33 and 34 are arranged at positions closer to the first support portion 31 side in the facing directions in which the first support portions 31 and 32 face each other, respectively. They are arranged so as to face each other in a direction intersecting the opposite direction. Specifically, a straight line L1 passing through the centers of the first support portions 31 and 32 (centers seen from the vertical direction) and a straight line passing through the centers of the second support portions 33 and 34 (centers seen from the vertical direction). The point P where L2 intersects is located closer to the first support portion 31 side than the central axis G (near the center between the central axis G and the first support portion 31).

Further, as shown in FIG. 5, the second support portions 33 and 34 are formed at positions outside the region where the main flame hole 30f is formed in the circumferential direction. Specifically, the direction of the arrow shown in FIG. 10A is the circumferential direction. Further, for example, the ranges AR1 and AR2 along the circumferential direction of FIG. 10A are regions in which the main flame hole 30f is formed in the circumferential direction. The second support portion 33 is formed in the burner head main body 30 in a region outside the range AR1 (a region adjacent to the range AR1). The second support portion 34 is formed in the burner head main body 30 in a region outside the range AR2 (a region adjacent to the range AR2). That is, the second support portions 33 and 34 are formed at positions that do not overlap with the main flame hole 30f in the vertical direction. As a result, the flow path of the secondary air (air used for combustion of the mixed gas of the fuel gas and the primary air) formed between the burner head main body 30 and the cap 40 is second above the main flame hole 30f. It will not be blocked by the supports 33 and 34.

Next, the cap 40 will be described. As shown in FIG. 3, the cap 40 has an upper plate portion 41 and a lower plate portion 42 fixed to the lower surface side of the upper plate portion 41. The upper plate portion 41 is a cover member that covers the burner head main body 30. The lower plate portion 42 corresponds to the first regulating portions 51 and 52 corresponding to the first supporting portions 31 and 32 and the second supporting portions 33 and 34 on the facing surface side (back surface side) facing the burner head main body 30. Second regulation units 53 and 54 are provided. Then, while the cap 40 is placed on the burner head main body 30 described above, the first regulating portions 51 and 52 engage with the first supporting portions 31 and 32, respectively. The cap 40 is fixed to the burner head main body 30 by engaging the second regulating portions 53 and 54 with the second supporting portions 33 and 34, respectively.

The upper plate portion 41 shown in FIG. 3 is configured as an annular plate having an annular shape and a plate shape. The upper plate portion 41 is made of, for example, a metal material, and the upper surface portion 41d thereof is barrel-polished as described later. It has a smooth and glossy structure in which other members do not protrude. In the upper plate portion 41, most of the outer peripheral portion 41a has a substantially circular outer shape. Then, the extending portion 41b is formed so as to extend outward from the portion having a substantially circular outer shape. As shown in FIG. 4, the extending portion 41b is a portion that faces the extending portion 30h of the cap 40 when the cap 40 is assembled to the burner head main body 30 and covers the extending portion 30h. The extension portion 41b has a width wider than that of the extension portion 30h and a length longer than that of the extension portion 30h so as to cover the entire extension portion 30h at the position above the electrode 6C (FIG. 1). It is formed by length.

Further, as shown in FIG. 3, in the central portion of the upper plate portion 41, a through hole 41c having a diameter substantially equal to that of the inner peripheral surface of the cylindrical portion 30a described above is provided in the thickness direction of the upper plate portion 41. It is formed with a structure that penetrates through. As shown in FIG. 4, the through hole 41c is arranged so as to communicate with the through hole 30d so as to continue above the internal space of the through hole 30d described above.

The lower plate portion 42 is fixed to the lower surface side of the upper plate portion 41 by a known metal joining method such as welding. Specifically, the lower surface of the upper plate portion 41 is overlapped with the upper surface of the lower plate portion 42 so that the thickness directions of both the upper plate portion 41 and the lower plate portion 42 are along the vertical direction. It is fixed in such a stacked state. As shown in FIG. 6, most of the lower surface of the lower plate portion 42 (the facing surface on the side facing the burner head main body 30) is configured as the lower surface of the cap 40. The lower plate portion 42 is configured as an annular plate having an annular shape and a plate shape. The upper plate portion 41 is made of, for example, a metal material. On the opposite surface side of the lower plate portion 42, the first regulating portions 51 and 52 corresponding to the first supporting portions 31 and 32 and the second regulating portion 53 corresponding to the second supporting portions 33 and 34, respectively. 54 and are formed. Specifically, the first regulation unit 51 is associated with the first support unit 31 as a regulation unit that acts on the first support unit 31, and specifically, a part of itself is associated with the first support unit 31 in the assembled state. It is associated as a regulation unit to be inserted into the first support unit 31. Similarly, the first regulation unit 52 is associated with the first support unit 32 as a regulation unit that acts on the first support unit 32, and specifically, a part of itself is the first in the assembled state. It is associated as a regulation unit to be inserted into the support unit 32. Further, the second regulation unit 53 is associated with the second support unit 33 as a regulation unit that acts on the second support unit 33, and specifically, a part of itself supports the second support unit 33 in the assembled state. It is associated as a regulation unit that regulates the relative movement of the unit 33. The second regulation unit 54 is associated with the second support unit 34 as a regulation unit that acts on the second support unit 34. Specifically, a part of itself is the second support unit 34 in the assembled state. It is associated as a regulation part that regulates the relative movement of.

As shown in FIGS. 3 and 10, the outer edge portion 42a of the lower plate portion 42 has a first outer edge portion 42b and second outer edge portions 42c and 42d. The first outer edge portion 42b has an outer edge shape along a circle having a predetermined radius centered on a predetermined center position (a position where the cap 40 overlaps the central axis G when assembled to the burner head main body 30). The second outer edge portions 42c and 42d have a shape narrowed to the center position side with respect to the first outer edge portion 42b. The distance (diameter) between the second outer edge portions 42c and 42d and the center position is smaller than the distance (diameter) between the first outer edge portion 42b and the center position. The second outer edge portions 42c and 42d are formed adjacent to each other in a half region of the outer edge portion 42a of the lower plate portion 42. Specifically, the second outer edge portion 42c includes a large outer edge portion 42e and a small outer edge portion 42f having a diameter smaller than that of the large outer edge portion 42e. Similarly, the second outer edge portion 42d includes a large outer edge portion 42g and a small outer edge portion 42h having a diameter smaller than that of the large outer edge portion 42g.

Further, as shown in FIGS. 3 and 10, an opening 42i penetrating in the plate thickness direction is formed at the center of the lower plate portion 42 so as to include the center position. The opening 42i is formed in a circular shape centered on the center position.

As shown in FIG. 6, the first regulating portions 51 and 52 are square plate pieces extending in the circumferential direction at a portion where a part of the opening 42i is cut out in the radial direction. The first regulation units 51 and 52 are formed at positions facing each other with the center position in between. Both the first regulation units 51 and 52 extend in the direction from one side to the other in the circumferential direction (counterclockwise when viewed from above in FIG. 10A). The first regulating portion 51 includes a base end portion 51a extending downward and an insertion portion 51b extending horizontally from the lower end of the base end portion 51a. The insertion portion 51b is inserted into the recess 31a by the first regulating portion 51 moving relative to the first support portion 31. The first regulating portion 52 includes a base end portion 52a extending downward and an insertion portion 52b extending horizontally from the lower end of the base end portion 52a. The insertion portion 52b is inserted into the recess 32a by the first regulating portion 52 moving relative to the first support portion 32. More specifically, the upper surface portion 30c and the lower surface (back surface) of the cap 40 face each other, and the center of the through hole 41c in the cap 40 and the central axis G of the through hole 30d in the burner head main body 30 are viewed in a plan view. A state in which the positional relationship is such that they sometimes overlap (see FIG. 4), and a state in which the height of the insertion portion 51b in the vertical direction (direction of the central axis G) is within the height range of the recessed region in the recessed portion 31a. , The height of the insertion portion 52b in the vertical direction (direction of the central axis G) is within the height range of the recessed region in the recess 32a, and the facing state and the positional relationship (in the cap 40) are satisfied. The cap 40 was rotated relative to the burner head body 30 while maintaining the positional relationship in which the center of the through hole 41c and the central axis G of the through hole 30d in the burner head body 30 overlap when viewed in a plane. Occasionally, the insertion portion 51b is inserted into the recess 31a and the insertion portion 52b is inserted into the recess 32a.

As shown in FIGS. 3 and 6, the second regulating portions 53 and 54 are formed so as to extend downward from the second outer edge portions 42c and 42d, respectively. The second regulating unit 53 includes a first locking piece 53a, a second locking piece 53b, and a third locking piece 53c. The first locking piece 53a and the second locking piece 53b are arranged on both sides of the second support portion 33 in the circumferential direction in a state where the cap 40 is assembled to the burner head main body 30. As shown in FIG. 3, the first locking piece 53a and the second locking piece 53b are square plate pieces extending from the large outer edge portion 42e and the small outer edge portion 42f, respectively. The first locking piece 53a and the second locking piece 53b are formed so as to be separated from each other with a predetermined interval (for example, about the width of the first locking piece 53a in the circumferential direction). As shown in FIG. 6, the third locking piece 53c is a square plate piece portion extending downward in a portion of the opening 42i notched in the radial direction. The third locking piece 53c is located between the first locking piece 53a and the second locking piece 53b in the circumferential direction.

Similarly, as shown in FIGS. 3 and 6, the second regulating unit 54 includes a first locking piece 54a, a second locking piece 54b, and a third locking piece 54c. The first locking piece 54a and the second locking piece 54b are configured to be arranged on both sides of the second support portion 34 in the circumferential direction in a state where the cap 40 is assembled to the burner head main body 30. As shown in FIG. 3, the first locking piece 54a and the second locking piece 54b are square plate pieces extending from the large outer edge portion 42g and the small outer edge portion 42h, respectively. The first locking piece 54a and the second locking piece 54b are formed so as to be separated from each other with a predetermined interval (for example, about the width of the first locking piece 54a in the circumferential direction). The third locking piece 54c is a square plate piece portion extending downward in a portion of the opening 42i notched in the radial direction. The third locking piece 54c is located between the first locking piece 54a and the second locking piece 54b in the circumferential direction.

3. 3. Manufacturing Method of Cap Next, the manufacturing method of the cap 40 will be described with reference to FIGS. 7 to 9 and 12.
The method for manufacturing the cap 40 mainly carries out the first step, the second step, and the third step described below.

First, for example, BA (Bright Annealed) material is punched out to form the upper plate portion 41. The BA material is subjected to cold rolling (a process of rolling through a plurality of rollers without heating a metal member) on a metal such as stainless steel, and then a bright heat treatment (a heat treatment of annealing in a non-oxidizing atmosphere). ) Is performed. Then, as the first step, barrel polishing is performed on the upper plate portion 41. Specifically, the barrel polishing is performed in the same manner as the known barrel polishing method. For example, as shown in FIG. 7, the upper plate portion 41, the media (abrasive material) 102, the compound (polishing aid), and the like are put in the barrel container 101, and the friction with the media 102 when the barrel container 101 is rotated. The upper plate portion 41 is polished.

The second step is performed after the first step. In the second step, the upper plate portion 41 and the lower plate portion 42 are welded. Specifically, the upper plate portion 41 and the lower plate portion 42 are welded by projection welding. As shown by x in FIG. 8A, the upper plate portion 41 and the lower plate portion 42 are welded at four locations by projection welding. Projection welding is performed in the same manner as known projection welding. For example, as shown in FIG. 8B, a projection 42j is provided on the lower plate 42, and the upper plate 41 and the lower plate 42 are formed by the electrodes 103 and 104 at the positions where the protrusions 42j are located. It is sandwiched and the protrusion 42j is pressed. Then, a large current is concentrated on the protrusions 42j via the electrodes 103 and 104, and the heat generated thereby melts the protrusions 42j to weld the upper plate 41 and the lower plate 42. As a result, the cap 40 is formed.

By barrel polishing in the first step, the upper surface portion 41d of the upper plate portion 41 can be evenly and finely scratched. Therefore, even if a welding mark is generated on the upper surface portion 41d of the upper plate portion 41 by the welding process in the second step, diffused reflection is generated by the fine scratches evenly attached to the upper surface portion 41d, and the welding mark can be made inconspicuous. .. The burner cap of FIG. 12A is a photograph of a conventional burner cap manufactured by projection welding without barrel polishing, taken from diagonally above. In the burner cap of FIG. 12A, welding marks (portions surrounded by circles) on the upper surface of the upper plate portion are conspicuous. On the other hand, the burner cap of FIG. 12B is a photograph of the burner cap of the present invention manufactured by using projection welding after barrel polishing, taken from diagonally above. In the burner cap of the present invention shown in FIG. 12 (B), welding marks are less noticeable than in the conventional configuration shown in FIG. 12 (A).

The third step is performed after the second step. In the third step, the upper surface portion 41d of the upper plate portion 41 is polished by a polishing method different from barrel polishing. Specifically, as shown in FIG. 9, electrolytic polishing is performed by a known electrolytic polishing method, the cap 40 is attached to the positive electrode 105, and direct current is applied to the negative electrode 106 via the electrolytic solution 107. An electric current is applied to melt and polish the upper surface (surface) of the upper surface portion 41d of the upper plate portion 41. As a result, the upper surface of the upper surface portion 41d of the upper plate portion 41 can be glossed, and the welding marks can be made more inconspicuous.

4. Assembling the Burner Head Next, assembling the cap 40 to the burner head main body 30 will be described with reference to FIGS. 10 and 11. In addition, in FIGS. 10A and 11, the state of the burner head main body 30 at the time of assembly is mainly shown from the upper side, and the lower plate portion 42 of the cap 40 to be assembled is virtually shown by a two-dot chain line.

The burner head main body 30 and the cap 40 are assembled in the order of FIG. 10 (A), FIG. 11 (A), and FIG. 11 (B). First, as shown in FIG. 10A, a cap 40 in which the first locking pieces 53a and 54a are not in the retaining posture described later is prepared. Then, the lower surface of the lower plate portion 42 of the cap 40 is placed on the burner head main body 30 in a state of being in contact with the tips of the first support portions 31, 32 and the second support portions 33, 34, respectively. At this time, the center of the through hole 41c in the cap 40 and the central axis G of the through hole 30d in the burner head main body 30 are in a positional relationship so as to overlap when viewed in a plan view (see FIG. 4). Further, as shown in FIG. 10A, when each of the insertion portions 51b and 52b is viewed in a plan view on one side in the circumferential direction with respect to the first support portions 31 and 32, respectively (as shown in FIG. 10A). The positional relationship is slightly deviated from the clockwise side with the central axis G as the center). At this time, the first regulating portions 51 and 52 are located between the first supporting portion 31 and the second supporting portion 34 and between the first supporting portion 32 and the second supporting portion 33 in the circumferential direction, respectively. Further, the second regulating portions 53 and 54 are located between the second supporting portion 33 and the first supporting portion 31 and between the second supporting portion 34 and the first supporting portion 32 in the circumferential direction, respectively.

As shown in FIG. 10B, in the cap 40 in which the first locking pieces 53a and 54a are not in the retaining posture, the first locking pieces 53a and 54a are, for example, downward from the lower surface of the lower plate portion 42. It is designed to extend. In this case, in the contact state as shown in FIG. 10A, the distance between the first locking pieces 53a and 54a and the central axis G is the position farthest from the central axis G in each of the first support portions 31 and 32. It should be larger than the distance to. By doing so, the first locking pieces 53a and 54a do not interfere with the first support portions 31 and 32 during the relative movement described later.

Then, the relative movement is performed from the state shown in FIG. 10 (A) to the state shown in FIG. 11 (A). Specifically, the center of the through hole 41c in the cap 40 and the central axis G of the through hole 30d in the burner head main body 30 are maintained in a positional relationship (see FIG. 4) so as to be substantially aligned when viewed in a plan view. Then, the lower surface of the lower plate portion 42 of the cap 40 is kept in contact with the tips of the first support portions 31, 32 and the second support portions 33, 34, respectively. Then, the cap 40 is rotated relative to the burner head main body 30 in the circumferential direction (specifically, counterclockwise in FIG. 10A). That is, the cap 40 is rotated about the central axis G.

With the upper surface portion 30c of the burner head main body 30 and the cap 40 facing each other, the cap 40 rotates relative to the upper surface portion 30c, so that the insertion portions 51b and 52b are inserted into the recesses 31a and 32a. Specifically, in the contact state between the burner head main body 30 and the cap 40 described above, the insertion portions 51b and 52b have the same height as the recesses 31a and 32a (the direction of the central axis G is the height direction). It is formed at the height when Therefore, when the insertion portions 51b and 52b rotate relative to each other while maintaining the contact state as described above, the insertion portions 51b and 52b both move in the horizontal direction (planar direction orthogonal to the central axis G) and in the circumferential direction. Then, as shown in FIG. 11A, the recesses 31a and 32a extending in the horizontal direction and the circumferential direction enter the inside.

The distance between the base end portions 51a and 52a of the first regulating portions 51 and 52 and the central axis G is about the same as the distance between the recesses 31a and 32a and the central axis G, respectively. That is, the recesses 31a and 32a are located on the rotation orbits (orbits when the cap 40 rotates) about the central axis G of the base end portions 51a and 52a, respectively. Therefore, after the insertion portions 51b and 52b have entered the recesses 31a and 32a, respectively, when the insertion portions are further rotated relative to some extent, the state shown in FIG. 11A is obtained. In the state of FIG. 11A, the base end portions 51a and 52a abut on the outer peripheral portions of the first support portions 31 and 32, respectively, without entering the recesses 31a and 32a, respectively, and further in the same direction (FIG. 11 (FIG. 11)). In A), the rotation (counterclockwise) is regulated.

Further, the distance between the second locking pieces 53b and 54b of the second regulating portions 53 and 54 and the central axis G is about the same as the distance between the second supporting portions 33 and 34 and the central axis G, respectively. That is, the second support portions 33 and 34 are located on the rotation orbits (orbits when the cap 40 rotates) about the central axis G of the second locking pieces 53b and 54b, respectively. Therefore, after the insertion portions 51b and 52b have entered the recesses 31a and 32a, when they are further rotated relative to some extent, the state shown in FIG. 11A is obtained. In the state of FIG. 11A, the second locking pieces 53b and 54b abut on the outer peripheral portions of the second support portions 33 and 34, and further rotate in the same direction (counterclockwise in FIG. 11A). Is regulated. That is, in the second regulation unit 53, 54, the second support units 33, 34 move relative to the second regulation unit 53, 54 on one side in the circumferential direction (counterclockwise in FIG. 11A). Regulate that. Conversely, the second support portions 33, 34 restrict the second regulation portions 53, 54 from moving relative to the second support portions 33, 34 in the circumferential direction.

As shown in FIG. 11B, the first locking pieces 53a and 54a are placed in a regulated posture by plastic deformation processing after the insertion portions 51b and 52b are inserted into the recesses 31a and 32a. Specifically, a force is applied to the first locking pieces 53a and 54a so as to press them in the direction of the arrow shown in FIG. 11B. As a result, it is processed so as to bend from each base end position on the lower surface of the lower plate portion 42 (the position of the root where the first locking pieces 53a and 54a extend from the lower surface of the lower plate portion 42) toward the center side of the burner head main body 30. By doing so, the first locking pieces 53a and 54a can be put into a retaining posture. In the retaining posture shown in FIG. 11B, the distance between the first locking pieces 53a and 54a and the central axis G is about the same as the distance between the second support portions 33 and 34 and the central axis G, respectively. There is. That is, the second support portions 33 and 34 are located on the central axis G of the first locking pieces 53a and 54a (the trajectory when the cap 40 rotates), respectively. Therefore, even if an attempt is made to return the state as shown in FIG. 11A to the position shown in FIG. 10A, the first locking pieces 53a and 54a hit the outer peripheral portions of the second support portions 33 and 34, respectively. It touches and further rotation is regulated. That is, in the second regulation unit 53, 54, the second support units 33, 34 move relative to the second regulation unit 53, 54 on one side in the circumferential direction (clockwise in FIG. 11B). To regulate. Conversely, the second support portions 33, 34 restrict the second regulation portions 53, 54 from moving relative to the second support portions 33, 34 in the circumferential direction.

As shown in FIG. 11B, with the insertion portions 51b and 52b inserted into the recesses 31a and 32a, the first regulation portions 51 and 52 have a central axis G with respect to the first support portions 31 and 32. Relative movement in the direction of is restricted. Further, the third locking pieces 53c and 54c are arranged on the central axis G side of the second support portions 33 and 34, respectively, and the second support portions 33 and 34 are arranged with respect to the second regulation portions 53 and 54, respectively. It regulates relative movement to the central axis G side. Conversely, the second support portions 33, 34 restrict the second regulation portions 53, 54 from moving relative to the second support portions 33, 34 on the side opposite to the central axis G.

5. Example of effect In the method of manufacturing a gas burner having this configuration, if the first step is performed so that the upper plate portion 41 is subjected to barrel polishing, the upper surface of the upper plate portion 41 is finely scratched due to the barrel polishing. Can be done. Therefore, the welding marks on the upper surface of the upper plate portion 41 caused by welding in the second step are likely to be buried in fine scratches caused by barrel polishing, and are less likely to be recognized as welding marks. Therefore, in the completed gas burner 6, the welding marks on the upper surface of the upper plate portion 41, which is easily visible to the user, are less noticeable, and the aesthetic appearance is enhanced.

The method for manufacturing a gas burner having this configuration is efficient because the upper plate portion 41 and the lower plate portion 42 are welded by projection welding, so that heat can be concentrated in a shorter time than by arc welding or the like. Stable welding can be performed. However, if projection welding is adopted, there is a concern that welding marks due to heat concentration in a narrow area will be conspicuous, but if the barrel polishing described above is adopted, such welding marks can be suppressed. .. That is, this manufacturing method is more useful because it can achieve both efficient and stable welding and improvement of aesthetics.

When barrel polishing is performed on the welded body after the upper plate portion 41 and the lower plate portion 42 are welded, an abrasive is used between the upper plate portion 41 and the lower plate portion 42 during the barrel polishing process. Etc. may enter, or the position may be displaced between the upper plate portion 41 and the lower plate portion 42. However, if the upper plate portion 41 and the lower plate portion 42 are welded after barrel polishing is performed on the upper plate portion 41, the above problem is less likely to occur.

If the third step is performed so as to polish the upper surface portion 41d of the upper plate portion 41 by a polishing method different from the barrel polishing after the second step, the upper surface of the upper plate portion 41 has a gloss due to the third step. Is attached, and the aesthetics are further enhanced. Moreover, in the above manufacturing method, since the upper surface in which the welding marks are buried in the scratches caused by the barrel polishing is polished, it is possible to give gloss in the form in which the welding marks are buried.

6. Other Embodiments The present invention is not limited to the embodiments described above and in the drawings. For example, the features of the embodiments described above or below can be combined in any combination within a consistent range. Further, any of the features of the above-mentioned or later-described embodiments may be omitted unless it is clearly stated as essential. Further, the above-described embodiment may be modified as follows.

In the above-described embodiment, the gas stove 1 configured as a built-in stove is illustrated as an example of the stove, but other types of stoves such as a table stove may be used.

In the above-described embodiment, in the method for manufacturing the cap 40, the upper plate portion 41 and the lower plate portion 42 are welded at four places in the second step, but welding is performed at a number of places other than the four places. May be good.

In the above-described embodiment, in the method for manufacturing the cap 40, even if the upper surface portion 41d of the upper plate portion 41 is buffed after the third step (electropolishing of the upper surface portion 41d of the upper plate portion 41). Good.

In the above-described embodiment, as the third step, electrolytic polishing is performed on the upper surface portion 41d of the upper plate portion 41, but a polishing method other than electrolytic polishing (for example, buff polishing or the like) may be used. Further, the configuration may be such that the third step is not performed.

It should be noted that the embodiments disclosed this time are exemplary in all respects and are not considered to be restrictive. The scope of the present invention is not limited to the embodiments disclosed here, but includes all modifications within the scope indicated by the claims or within the scope equivalent to the claims. Is intended.

10, 20 ... Burner head 4, 5, 6 ... Gas burner (stove burner)
30 ... Burner head body 40 ... Cap 41 ... Upper plate 41d ... Upper surface 42 ... Lower plate

Claims (4)

A method for manufacturing a stove burner having a burner head including a burner head main body, an upper plate portion and a lower plate portion welded to each other, and a cap fixed on the burner head main body.
The first step of barrel polishing the upper plate portion and
The second step of welding the upper plate portion and the lower plate portion, and
A method of manufacturing a stove burner including. The method for manufacturing a stove burner according to claim 1, wherein in the second step, the upper plate portion and the lower plate portion are welded by projection welding. The method for manufacturing a stove burner according to claim 1 or 2, wherein the second step is performed after the first step. The method for manufacturing a stove burner according to any one of claims 1 to 3, further comprising a third step of polishing the upper surface portion of the upper plate portion by a polishing method different from the barrel polishing after the second step. ..