JPH11159760A - Burner ring and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent air supply ports for secondary air which are formed in a burner ring from being horizontally exposed to upper space as much as possible, and to provide a method for manufacturing the burner ring having an accordingly satisfactory structure in a burner ring which is inserted to and mounted on a burner head of a gas burner of a gas range in an outwardly protruded manner. SOLUTION: A burner ring 4 comprises an inner ring portion 43 which is inserted outwardly to a burner head, an outer ring portion 44 of which inner circumferential edge is located below or above the inner ring portion 43, and a connection portion 46 which connects the outer circumferential edge of the inner ring portion 43 and the inner circumferential edge of the outer ring portion 44, being provided with air supply ports therein. For manufacturing the burner ring 4, a bending is provided between the outer circumferential edge of an area of the inner ring portion 43 and the inner circumferential edge of an area of the outer ring portion 44 which is concentric with the inner ring portion 43 so as to form a step in the direction of the thickness of the boards. Thereafter, a protruded portion formed inside the area of the inner ring portion 43 is pressed in the direction of crushing the protrusion, followed by punching the inside portions of the area of the inner ring portion 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner ring externally fitted to a burner head of a gas burner in a gas stove and a method of manufacturing the same.

[0002]

2. Related Art The invention of Japanese Patent Application No. 9-6901 has already been proposed as a gas stove in which a burner ring is mounted on a burner head of a gas burner. FIG. 19 is an exploded perspective view of a gas stove exemplified as one embodiment of the present invention.

This gas stove has three gas burners (3).
A cooking stove body (2), a top plate (7) covering the upper end opening portion, and a juice tray (8) arranged at a predetermined interval on the upper surface of the top plate (7). Further, there are provided burner rings (4) (4) (4) mounted on the upper surface of the juice receiving tray (8) and fitted to the burner heads of the three gas burners (3).
The burner ring (4) is provided with air supply ports (41) (41) for supplying secondary air to the gas burner (3).
The stove body (2) is formed with a grill (6) having a tray (60) that can be pulled out in front of the stove body (2), and a gorge (5) is provided on the juice tray (8). It is to be placed.

In this apparatus, a top plate (7) is used to cover the open end of the stove main body (2) with a top plate (7), and a juice tray (8) is placed thereon. The burner head of the gas burner (3) protrudes above the juice receiving tray (8) via (81), and the burner ring (4) is fitted to the protrusion of the burner head.
Then, the burner ring (4) is placed on the upper surface of the juice receiving tray (8), which is the placement surface. After that, tray (60) and Gotoku
(5) Attach the gas stove to complete the assembling work.

The gas stove is used by being mounted on a countertop (11) of a system kitchen as shown in FIG. As shown in the figure, the burner head of the gas burner (3)
(31) is a top plate (7) facing up and down and a through hole (7
1) It protrudes upward via (81), and a burner ring (4) is externally fitted to the protruding portion, and the attachment of the burner ring (4) makes the juice tray (8) unsightly. Through hole (8
1) is hidden.

In this apparatus, when the gas burner (3) is burned, the space below the top plate (7) → the through hole (71) of the top plate (7) → the through hole (81) of the juice tray (8) → Air supply port (41) of burner ring (4) →
The secondary air for combustion is supplied in a path connected to the flame hole (33a) of the burner head (31), thereby ensuring proper combustion of the gas in the flame hole (33a).

[0007]

However, in the burner ring (4) fitted to the gas burner (3),
Connecting part (46) located at the boundary between the inner and outer ring parts (43) (44)
Are formed in a conical shape whose diameter increases upward, and air supply ports (41) (41) are formed in the connecting portion (46).

Accordingly, in the burner ring (4) having such a structure, the air supply ports (41) (4) are provided in the space above the burner ring (4).
There was a problem that 1) was exposed and became unsightly. The invention of the present application has been made in view of the above points, and the invention of claim 1 is to provide a burner ring (4) having a structure in which the air supply ports (41) and (41) are hardly exposed upward. Make it an issue.

Another object of the present invention is to provide a method for manufacturing the burner ring (4) according to the first aspect of the present invention.

[0010]

According to a first aspect of the present invention, there is provided a burner ring externally fitted to a burner head of a gas burner incorporated in a gas stove. An inner ring portion (43) externally fitted to the burner head, an outer ring portion (44) whose inner peripheral edge is located below or above the lower surface of the inner ring portion (43), and the inner ring portion (43). 43) and a connecting portion (46) which connects the inner peripheral edge of the outer ring portion (44) and has an air supply opening (41). "

According to the above technical means, the outer ring portion (44)
Is located below or above the lower surface of the inner ring portion (43), so that the connecting portion () connects the inner peripheral edge of the outer ring portion (44) and the outer peripheral edge of the inner ring portion (43). The supply port of (46) is the inner ring part (43) and outer ring part of the burner ring (4) in plan view.
It is located between the overlapping portions of (44). The technical means of the invention of claim 2 for solving the above-mentioned problem is that "a bulge (511) made of a single metal plate and formed on a part thereof and a bulge (511) surrounding the bulge (511)" is formed. The inner ring portion area (5) concentrically arranged radially outward from the ridge portion (511).
12), a connection part area (513) and an outer ring part area (514), and the connection part area (513) has a plurality of air supply ports (41) arranged in the circumferential direction. And a step in the rising direction of the ridge portion (511) is formed between the outer peripheral edge of the inner ring portion area (512) and the inner peripheral edge of the outer ring portion area (514). Connection area (513)
A bending step of bending the protruding portion (511) to shift the outer peripheral edge of the inner ring portion area (512) above or below the lower surface of the outer ring portion area by applying pressure in the direction of squashing. And a mounting hole punching step for punching the inside of the inner ring part area (512). "

According to the above technical means, the ridge is provided between the inner ring area (512) and the outer ring area (514).
When a bending step of bending the connection area (513) so as to form a step in the protruding direction of (511) is performed, the outer ring area (514) and the inner ring area (512) are connected to the connection area (513). ) The part has a step. In this state, pressure is applied in a direction to crush the protruding portion (511) inside the inner ring portion area (512), whereby the inner ring portion area (51) is pressed.
The outer peripheral edge of 2) is shifted above or below the upper surface of the outer ring portion area (514) to incline the connecting portion area (513) (inclination processing step). That is, when the protruding portion (511) is pressurized and flattened, the diameter of the boundary between the protruding portion (511) and the inner ring portion area (512) on the outer periphery increases, and in conjunction with this, The outer diameter of the inner ring part area (512) is also enlarged so that the outer peripheral edge of the inner ring part extends below the lower surface or above the upper surface of the outer ring part area (514). Therefore, the inner ring area (5
The connecting area (513) connecting the outer peripheral edge of the outer ring section area (12) and the inner peripheral edge of the outer ring section area (514) is an inner ring section area (512).
And the upper and lower overlapping portions of the outer ring area (514).

Next, a mounting hole punching step for punching the inside of the inner ring portion area (512) is performed to form a mounting hole for externally fitting the burner head of the gas burner. This allows
The burner ring according to the first aspect of the present invention can be manufactured. Claim 3
The technical means of the invention of the invention is, `` By drawing a single metal plate, a raised portion (511) formed in a part thereof,
An inner ring area (512), a connecting area (513), and an outer ring area (51) that surround the ridge (511) and are arranged concentrically and sequentially radially outward from the ridge (511). 51
4) a step of manufacturing an initial processing member having: a supply port punching step of punching a plurality of supply ports (41) circumferentially arranged in the connection area (513); and an inner ring section area ( Five
A bending step of bending the connecting portion area (513) so that a step in the rising direction of the raised portion (511) is formed between the outer peripheral edge of the outer ring portion area and the inner peripheral edge of the outer ring portion area (514). And pressurizing in the direction of crushing the raised portion (511) to shift the outer peripheral edge of the inner ring portion area (512) to above or below the upper surface of the outer ring portion area, and to move the connecting portion area (5).
13) and a mounting hole punching step of punching the inside of the inner ring portion area (512) ”.

According to the above-mentioned technical means, a single metal plate is drawn to form a raised portion (511) and an inner ring portion area (512) arranged concentrically and sequentially outside so as to surround the raised portion. ) And connection area (513) and outer ring area (5
14) is manufactured, and then an air supply port punching step of punching a plurality of air supply ports (41) arranged in the circumferential direction in the connection area (513) is performed. An intermediate product corresponding to the invention-specifying matter of the second aspect is completed, and thereafter, a burner ring is manufactured by performing the same steps as the second aspect of the invention.

The raised portion (511) is provided in the inner ring portion area (5).
12) and a hemispherical protuberance centered on the common center of the outer ring portion area (514) or a topped cylindrical protuberance. Department (5
11) is the concentrically arranged inner ring portion area (51)
2) and the connection area (513) and the outer ring area
(514) is an annular ridge that is raised to surround the common center ”.

The bending step and the tilting step according to the second and third aspects of the present invention are described as follows. "The bending step includes the step of forming the outer peripheral edge of the inner ring portion area (512) into the outer ring portion area (514). Bending the connecting portion area (513) so as to be shifted upward from the inner peripheral edge; and in the tilting step, the connecting portion area (513) is connected so that a lower end of the connecting portion area (513) is located closer to the center than an upper end. (The invention of claim 5), or conversely, "the bending step is performed in the inner ring part area (512)".
Bending the connecting portion area (513) so that the outer peripheral edge of the connecting portion area (514) is shifted below the inner peripheral edge of the outer ring portion area (514).
(513) is a processing step in which the connecting portion area (513) is inclined such that the upper end of the (513) is located closer to the center side than the lower end. "

[0017]

As described above, according to the first aspect of the present invention, the air supply port (41) of the connecting portion is provided between the overlapping portion of the inner ring portion and the outer ring portion of the burner ring in plan view. Since it is located, it is possible to avoid the disadvantage that it is exposed upward and becomes unsightly. According to the invention of claims 2 to 6, claim 1
The invention provides a method for manufacturing a burner ring according to the invention.

Further, in the inventions of claims 2 to 6, since the burner ring (4) is manufactured from a single metal plate, assembly such as in the case where the burner ring (4) is manufactured by combining a plurality of parts. No work is required, and manufacturing efficiency is improved.
Further, as compared with a case where a plurality of parts are combined, the complexity of parts management and handling work due to handling of the plurality of parts can be avoided.

[0019]

Next, an embodiment of the present invention will be described. As shown in FIG. 1, the burner ring (4) according to the present embodiment is externally fitted to the burner head of three gas burners (3) incorporated in the stove body (2) in the same manner as the conventional one described above. It is placed on the soup tray (8), which is the placement surface, in a state where it has been set. First Embodiment * Overall Configuration * As shown in FIGS. 2 and 3, a burner ring (4) according to this embodiment is a gas burner (2) incorporated in a stove body (2) of FIG. 3) a circular inner ring portion (43) fitted outside the burner head (31), and an outer ring portion (44) connected to the outer periphery of the inner ring portion (43) via a connecting portion (46). , These inner ring parts
(43) and the outer ring portion (44) are located coaxially. * Structure of the inner ring part (43) * An annular hanging piece (42) is bent and hung on the inner periphery of the inner ring part (43), and the mounting hole () is surrounded by the annular hanging piece (42). The diameter of (40) is the burner head (31) of the gas burner (3).
Of the burner head (31) so that the burner ring (4) can be fitted almost tightly on the burner head (31). ) To prevent infiltration of boiling water.

The inner ring portion (43) is inclined so as to gradually increase as it approaches the inner periphery from the outer periphery, so that boiling spills falling on the inner ring portion (43) during use, which will be described later. It naturally flows to the outer ring portion (44) side of the outer periphery. In this embodiment, the inner and outer diameters of the inner ring portion (43) are about 75 mm and 110 mm, respectively.
Is set to * Configuration of outer ring part (44) * Outer ring part (44) located coaxially with inner ring part (43).
Has an annular leg (49) that bends and hangs on the outer periphery, and the inner peripheral edge of the upper surface (44a) of the outer ring portion (44) is the inner ring portion.
It extends to below the lower surface (43b) of (43), so that the inner peripheral edge of the outer ring portion (44) is sunk below the inner ring portion (43). To achieve such a configuration, the inner diameter of the outer ring portion (44) is set to be larger than the inner diameter of the inner ring portion (43) and smaller than the outer diameter of the inner ring portion (43). The outer ring portion (44) is connected to the inner ring portion (4
Similarly to 3), it is inclined so as to gradually increase as it approaches the inner circumference from the outer circumference, so that the boiling spill falling on the outer ring part (44) flows naturally on the juice receiving tray (8). I have. Further, as a result of having the above configuration, the lower end of the annular leg (49) on the outer periphery of the outer ring portion (44) is located at the lowest position, whereby the burner ring is attached to the juice receiving tray at the lower end of the annular leg (49). (8)
It can be set up on the upper surface of the camera.

In this embodiment, the outer ring portion (4
The inner and outer diameters of 4) are set to about 105 mm and 145 mm, respectively. * Structure of the connecting portion (46) * The outer peripheral edge of the inner ring portion (43) and the inner peripheral edge of the outer ring portion (44) are formed by five legs (460) provided at a pitch of 72 ° along these peripheral edges. ) (460) and these legs (460)
(460) constitutes a connecting portion (46), and the space between these legs (460), (460) serves as an air supply port (41) for supplying secondary air to the gas burner (3). ing.

In this embodiment, the vertical distance between the outer peripheral edge of the inner ring portion (43) and the inner peripheral edge of the outer ring portion (44) is about 4 mm.
Is set to * Manufacturing method of burner ring (4) * Next, a manufacturing method of the burner ring (4) will be described. First, a metal disk was drawn by a press machine, and FIG.
The first intermediate product (5) having the three-dimensional shape shown in (a) and (b)
1) Build. Incidentally, the first intermediate product (51) corresponds to the initial processing member which is the invention specifying matter of the third aspect of the present invention.

As shown in FIG. 2B, the first intermediate product (51) has a central bottomed cylindrical portion (510) and an arc-shaped bulge which is continuous with the outer periphery of the upper end thereof and protrudes upward. And an outer ring portion area (512) for forming the above-described inner ring portion (43), and a connecting portion on the outer periphery of the raised portion (511).
The connecting portion area (513) for forming (46) and the outer ring portion area (514) for forming the outer ring portion (44) are concentrically continuous. Therefore, in this case, the inner ring portion area (512) and the connecting portion area (51) are arranged concentrically.
An annular ridge (511) is formed to surround the common center of 3) and the outer ring area (514).

Further, on the outer periphery of the outer ring portion area (514), a cutting area for trimming to adjust the contour shape is provided.
(515) is overhanging and the outer ring area (51
The lower end of the annular leg area (490) on the outer side of (4) is lower than the lower surface of the portion connected from the inside to the inner peripheral edge of the inner ring area (512). (A) in the figure is the first intermediate product (5
It is a top view of 1).

Next, an air supply port punching step for producing a second intermediate product shown in FIG. 5 is executed. In this air supply hole punching step, the cutting area (515) on the outer periphery of the first intermediate product (51) is cut by a press machine, and simultaneously with the cutting, the connecting area (51) is cut.
3) Punch the air supply ports (41) and (41) so that they are lined up in the circumferential direction. Thereby, the second intermediate product (52) shown in FIG.
(Corresponding to the intermediate product which is the invention specific matter of the present invention) is completed.

Next, the second intermediate product (52) is further processed by using a press die shown in FIG. Lower mold of this press mold (54)
On the upper surface, irregularities for forming the inner ring portion (43) and the outer ring portion (44) of the burner ring (4) are formed. On the other hand, in a cylindrical hole (552) formed in the center of the lower surface of the holder (550) constituting the upper die (55), a cylindrical positioning die (551) is urged downward by a spring (553). It is loaded.

Outside the positioning die (551), a cylindrical extending die (554) and a pressing die (557) are arranged coaxially, and these extending die (554) and pressing die (557) are arranged. ) Is the spring (5
It is biased downward at 55) (559). Pressing type (557)
On the outside, five bending dies (558) (558) arranged at intervals of 72 ° in the circumferential direction are provided in a state urged outward and downward by springs (68) (68). I have. Then, the bending mold (5
58) are each formed in the shape of a prism, and the outer corner (67) at the upper end thereof is an inclined surface. The bending mold (558) is inserted into a square hole (62) formed in the holder (550) so as to be slidable in the vertical direction. Also other types
(551), (554), and (557) are also slidable up and down with respect to the housing (550).

The positioning mold (551), the extension mold (554),
The pressing die (557) and the bending die (558) are prevented from falling downward by a retaining mechanism (not shown). When the second intermediate product (52) described above is further processed by using the press die, the legs (4) constituting the connecting portion (46) of the burner ring (4) are required.
60) (460) (The air supply port (41) at the connecting part (46)
The second intermediate product (52) is set in the lower mold (54) such that the bending mold (558) corresponds to the portion where the (41) is not formed) in the circumferential direction (see FIG. 6).

Next, when the upper mold (55) is lowered, as shown in FIG. 7, first, the bottomed cylindrical portion (52) of the second intermediate product (52) is moved by the positioning mold (551) at the center of the upper mold (55). 510) is pressed onto the lower mold (54), thereby stabilizing the second intermediate product (52). When the upper die 55 further descends, the upper end of the positioning die 551 penetrates deeply into the cylindrical hole 552 while compressing the spring 553, as shown in FIG. Five
The inner ring part area (512) of (2) is a pressing die (557) and a lower die (54)
The upper ring is pressed by a predetermined pressure (a pressure at which the inner ring area (512) can slide between the lower die (54) and the pressing die (557)). Also, the lower end of the bending mold (558) comes into contact with the outer ring portion area (514). In this state, the extension line (b) of the inner edge of the air supply ports (41) (41) formed in the second intermediate product shown in FIG.
The outer peripheral edge of the lower end of the pressing die (557) coincides with the outer peripheral edge of the air supply port (41). The tip of (59) matches.

When the upper mold (55) is further lowered in this state,
As shown in FIG. 9, the outer corner at the upper end of the bending mold (558)
(67) is pushed by the inclined surface (69) of the holder (550) and moves inward, and the bending mold (558) moves the outer ring area (514) into the inner ring area by the biasing force of the spring (68). (512) Bend down below. That is, the bending die (558) moves obliquely downward and inward (in this case, the tip of the triangular protrusion (59) of the bending die (558) is always kept in a state of coincident with the above-mentioned extension line (a). As a result, the outer ring portion area (514) is deformed so as to be shifted (downward) in a direction opposite to the rising direction of the raised portion (511) with respect to the inner ring portion area (512). invention). In other words, the connecting portion area is formed such that a step in the protruding direction of the raised portion (511) is formed between the outer peripheral edge of the inner ring portion area (512) and the inner peripheral edge of the outer ring portion area (514). A bending step of bending (513) is performed.
As a result, the outer ring area (514) is clamped by the bending mold (558) and the lower mold (54). Then, as shown in the figure, the legs (460) (460) constituting the connecting portion (46) are bent perpendicularly to the inner ring area (512) and the outer ring area (514). With the legs (460) (460)
The tip of the triangular projection (59) of the bending mold (558) coincides with the lower end corner of the bending die. In this case, the triangular protrusion (59) of the bending mold (558) is connected to the extension line described above, which is one end of the leg (460).
Since the leg (460) is bent in a state conforming to (a), the bent corner portion is bent into an edge shape.

In the state of FIG. 9, the lower mold (54) and the upper mold (55)
The extended mold (554) is in contact with the raised part (511) of the intermediate product sandwiched between the upper mold (55) and when the upper mold (55) is further lowered, the extended mold (554) is brought into contact with the raised part (511). Is pressed in the direction of crushing. Then, as shown in FIG. 10, the inner ring portion area (512) slides so as to escape between the lower die (54) and the pressing die (557) so that the inner ring portion area (51) is released.
2) is shifted above the upper surface of the outer ring part area (514), and the legs (460) constituting the connecting part area (513) are inclined (the inclination processing step is performed). Thereby, the connecting portion area (513) is inclined such that the lower end of the connecting portion area (513) is located closer to the center than the upper end (the invention of claim 5), and is formed in the connecting portion area (513). A third intermediate product (53) is formed in which the air supply ports (41) and (41) are hidden between the upper and lower overlapping portions of the outer circumference of the inner ring area (512) and the inner circumference of the outer ring area (514).

Next, when the upper mold (55) is raised to the initial position and the third intermediate product (53) is forcibly pulled downward from the press mold, the legs (460) in the inclined state are bent. 558) The bending die (558) is pushed outward by contacting the triangular projection (59) at the lower end, whereby the upper outer side of the bending die (558) is held by the holder.
It enters the recess (569) of (550) (see FIG. 10) and is returned to the initial state.

Next, a mounting hole punching step of forming a mounting hole (40) by pressing a central portion of the third intermediate product (53) pulled out from the press die is performed, and further, an outer ring portion (44) is formed. 11), the annular leg (49) on the outer periphery is slightly bent inward and the annular hanging piece (42) on the inner periphery of the inner ring portion (43) is formed to complete the burner ring (4) as shown in FIG. In this one, Figure 1
In the state of 0, the leg (4) extends along the upper inclined surface (590) of the tip of the triangular protrusion (59) formed on the bending mold (558).
Since the (60) is inclined, the leg (460) is bent neatly.
In the state of FIG. 10, the outer ring portion area (514)
The triangular protrusion (59) does not necessarily need to be formed on the bending mold (558) as long as it can press the vicinity of the inner circumference of the lower mold (558) onto the lower mold (54). However, the triangular protrusion (5
If 9) is not provided, it is necessary to form a gap between the bending mold (558) and the pressing mold (557) to such an extent that the inclination of the leg (460) is allowed.

The burner ring (4) is used by being fitted to the burner head (31) of a gas burner (3) incorporated in the stove body (2) in the same manner as the conventional one described above. FIG. 12 is a sectional view of a main part showing a state where the stove body (2) shown in FIG. 1 is attached to an opening (12) formed in a countertop (11) of a system kitchen. The hanging flange (22) projecting to the outer periphery of the upper end is engaged with the outer peripheral edge of the opening (12) formed in the countertop (11),
The top plate (7) covering the top opening of the stove body (2) and the through holes (71) (8) formed in the bottom plate of the juice tray (8) placed on it
From 1), the burner head (31) of the gas burner (3) projects upward.

When the burner ring (4) according to the embodiment of the present invention is mounted on the gas burner (3), the mounting hole (40) formed in the center of the burner ring (4) is connected to the burner head. Externally fit to (31). Then, since the inner diameter of the mounting hole (40) is set to a dimension substantially equal to the outer diameter of the burner head (31), the burner ring (4) is attached to the burner head (3).
It becomes a state of being fitted almost densely in 1), and there is no inconvenience that boil-in spills into these boundaries. Also, the air inlet of the connecting part (46)
Since (41) is hidden by the overlapping portion of the outer periphery of the inner ring portion (43) and the inner periphery of the outer ring portion (44), it is difficult to see from above,
The air supply port (41) does not become unsightly unlike the above-described conventional one in which the air supply port (41) is exposed. When the gas burner (3) burns, the space below the top plate (7) → the through hole (71) in the top plate (7) →
Through hole (81) in soup tray (8) → Air supply port (41) for burner ring (4)
→ The secondary air for combustion is supplied through the path connected to the flame hole of the burner head (31), and the proper combustion of the gas burner (3) is ensured. [Second Embodiment] A burner ring (4) according to a second embodiment shown in FIG. 13 has an outer peripheral edge of an inner ring portion (43) below a lower surface of an outer ring portion (44). The configuration is the same as that of the first embodiment described above, except that it has a sunk structure. Therefore, in this device, the air supply port (41) formed in the connecting portion (46) that connects the inner peripheral edge of the outer ring portion (44) and the outer peripheral edge of the inner ring portion (43) is provided by the outer ring portion (44). It is hidden on the lower surface, making it difficult to see from the outside. * Manufacturing method of burner ring (4) * Next, a manufacturing method of the burner ring (4) will be described.

As in the first embodiment, FIG.
A second intermediate product (52) shown in FIG. 14 is produced, and this is set in a lower mold (64) of a press type as shown in FIG. The upper mold (65) shown in the figure
The positioning die (651) is formed in a solid columnar shape, and the extending die (654) and the pressing die (658) are formed in a hollow cylindrical shape, and the extending die (654) and the pressing die (658) are formed. )
The bending die (657), which is located in the middle of the (5), is placed at five locations at intervals of 72 ° in the circumferential direction (the locations corresponding to the legs (460) and (460) forming the connection (46) of the burner ring (4)). Is provided.

When the second intermediate product (52) is further processed by using the press mold, the legs (460) (460) constituting the connecting portion (46) of the burner ring (4) (the connecting portion ( In the part where the air inlets (41) and (41) are not formed in 46), bend dies (6
57) so that the second intermediate product (52) corresponds in the circumferential direction.
To the lower mold (64). Next, when the upper mold (65) is lowered, as shown in FIG. 15, first, the positioning mold (651), the pressing mold (658) and the lower mold (64) form a bottomed cylindrical shape of the second intermediate product (52). The bottom plate of the part (510) and the outer ring part area (514) are clamped. In this state, the extension (a) of the outer edge of the air supply port (41) (41) formed in the second intermediate product shown in FIG. 640) projecting inward from the upright wall (641). The extension line (a) is projected from the upright wall (641) to the inside, as described later, because the leg (460) has a clearance space required when the leg (460) is bent from the vertical state in FIG. 16 to the inclined state in FIG. (642) The lower mold (64) and the legs (4
60). In addition, the above leg
Since the bent portion at one end (portion of the extension line (a)) of (460) is weak in strength and easily bent, even if the extension line (a) does not coincide with the upright wall (641) as described above, The leg (460) is reliably bent at the one-end bending portion as described later.

In the state shown in FIG. 15, the tip of the triangular projection (58) at the lower end of the bending die (657) is located inside the above-mentioned extension line (a). Inside the extension (a), the triangular protrusion (58)
Is located, the bending force when the bending mold (657) is pushed down acts on the bent portion at one end of the leg (460) (the weakened portion of the extension (a) described above). This is because the leg (460) can be bent downward.

The other end of the leg (460) is bent (extended line).
The portion (b)) is weak in strength and easily bent, similarly to the one-end bent portion corresponding to the extended line (a). Therefore, the bending mold (6
57) Even if the tip of the lower triangular protrusion (58) does not coincide with the extension (b), if the tip is located inside the extension (a) as described above, The bent portion at the end (the weak portion of the extension line (b)) can be surely bent and deformed.

Next, when the upper die (65) descends from the state shown in FIG. 15, the bending die (657) pushes down the inner ring area (512) as shown in FIG. (514) with respect to the inner ring area (512).
(11) The invention is deformed so as to be displaced upward in a direction opposite to the rising direction of (11). In this state, the inner ring portion area (512) is pressed by the bending die (657) and the lower die (64) at a predetermined pressure (the inner ring portion area (512) passes between the bending die (657) and the lower die (64)). (A pressure that can slide).

When the upper mold (65) further descends, the extension mold (65)
4) presses the bulge (511) in a direction to crush it, and FIG.
As shown in FIG. 7, the inner ring portion area (512) slides between the lower mold (64) and the bending mold (657) so as to escape outward. That is, the outer peripheral edge of the inner ring area (512) is shifted below the lower surface of the outer ring area (514). Thus, the connecting area (513) is inclined such that the lower ends of the legs (460) constituting the connecting area (513) are located closer to the center than the upper ends.
Invention), the air supply port (41) formed in the connection area (513)
A third intermediate product (53) is formed between the upper and lower overlapping portions of the outer circumference of the inner ring area (512) and the inner circumference of the outer ring area (514).

Thereafter, similarly to the first embodiment, the mounting hole (4) at the center of the burner ring (4) is removed by pressing.
When the operation of forming (0) is performed, the burner ring (4) as shown in FIG. 13 is completed. In addition, in FIG. 17, when pressurizing in the direction of crushing the protruding portion (511), if the bending mold (657) is moved outward immediately before the pressing, the triangular protrusion ( 58) can reliably press the vicinity of the lower end of the leg (460), and the portion can be bent neatly. In this case, the air supply port (41) is hidden in the upper and lower overlapping portions of the inner periphery of the outer ring portion (44) and the outer periphery of the inner ring portion (43).
As shown in FIG. 8, when the burner ring (4) is externally fitted to the burner head (31) of the gas burner (3), the air supply port (41) is not exposed to the outside and does not become unsightly.

In each of the above embodiments, the first intermediate product (51)
At the outer circumference of the outer ring area (514)
15, the protrusion (659) is formed on the outer periphery of the lower surface of the pressing die (658), and the outer ring portion area (514) is formed in the lower die (514) as shown by the imaginary line in FIG. 54) and at the same time bending the circular leg area (490)
It is also possible to form 9).

It is also possible to bend the annular leg (49) before and after the work of punching the inside of the inner ring area (512). Further, in each of the above-described embodiments, the type in which the annular leg (49) bent and suspended on the outer peripheral edge of the outer ring portion (44) is placed on the juice receiving tray (8) has been described by way of example. Those not provided with legs (49) or annular hanging pieces (42), and those in which the inner ring part (43) is externally fitted and locked to a step part provided around the outer periphery of the upper end of the burner head of the gas burner Is also included in the concept of the present invention. Or, a burner ring having these structures
The manufacturing method for producing (4) is also included in the concept of the present invention.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a gas stove for explaining a use state of a burner ring (4) according to a first embodiment of the present invention.

FIG. 2 is a sectional perspective view of a burner ring (4) according to the first embodiment of the present invention.

FIG. 3 is a plan view of a partially cutout of the burner ring (4) according to the first embodiment of the present invention.

FIG. 4 is a structural view of a first intermediate product (51) for manufacturing a burner ring (4) according to the first embodiment of the present invention.

FIG. 5 is a structural view of a second intermediate product (52) for manufacturing a burner ring (4) according to the first embodiment of the present invention.

FIG. 6 is an explanatory view of a bending process for manufacturing a burner ring (4) according to the first embodiment of the present invention.

FIG. 7 shows a bottomed cylindrical portion (510) in a bending process for producing a burner ring (4) according to the first embodiment of the present invention.
Explanatory drawing of the state in which is fixed

FIG. 8 shows an inner ring portion area in a bending process for producing a burner ring (4) according to the first embodiment of the present invention.
Explanatory drawing with (512) pinched

FIG. 9 shows an outer ring portion area in a bending process for producing a burner ring (4) according to the first embodiment of the present invention.
Explanatory drawing with (514) pressed down

FIG. 10 is an explanatory view showing a state in which a protruding portion (511) is pushed down in a bending process for producing a burner ring (4) according to the first embodiment of the present invention.

FIG. 11 is a sectional view of a burner ring (4) according to the first embodiment of the present invention.

FIG. 12 is an explanatory view of use of the burner ring (4) according to the first embodiment of the present invention.

FIG. 13 is a sectional perspective view of a burner ring (4) according to a second embodiment of the present invention.

FIG. 14 is an explanatory view of a bending process for manufacturing a burner ring (4) according to the second embodiment of the present invention.

FIG. 15 shows a bottomed cylindrical portion (51) in a bending process for producing a burner ring (4) according to a second embodiment of the present invention.
0) and outer ring area (514) fixed

FIG. 16 is a diagram showing a state in which an inner ring portion area (512) is pushed down in a bending step of forming a burner ring (4) according to a second embodiment of the present invention.

FIG. 17 is a diagram showing a state in which a raised portion (511) is pressed in a bending process for forming a burner ring (4) according to a second embodiment of the present invention.

FIG. 18 is an explanatory diagram of a use state of the burner ring (4) according to the second embodiment of the present invention.

FIG. 19 is an explanatory diagram of a conventional example.

FIG. 20 is an explanatory view of a conventional example.

[Explanation of symbols]

 (4) ・ ・ ・ Burner ring (31) ・ ・ ・ Burner head (41) ・ ・ ・ Air supply port (43) ・ ・ ・ Inner ring part (44) ・ ・ ・ Outer ring part (46) ・ ・ ・ Connection Part (511) ・ ・ ・ Protrusion (512) ・ ・ ・ Inner ring area (513) ・ ・ ・ Connecting area (514) ・ ・ ・ Outer ring area

Claims (6)

[Claims] A burner ring externally fitted to a burner head of a gas burner incorporated in a gas stove, wherein an inner ring portion (43) externally fitted to the burner head, and an inner peripheral edge of the inner ring portion (43). An outer ring portion (44) located below or above the lower surface of the outer ring portion (43), and an outer peripheral portion of the inner ring portion (43) and an inner peripheral edge of the outer ring portion (44) are connected and an air supply port (41) And a connecting part (46) in which a burner is opened. 2. A protruding portion (511) formed of a single metal plate and formed on a part thereof, and surrounds the protruding portion (511) and extends radially outward from the protruding portion (511). Inner ring area (512) and connecting area (513) arranged concentrically and sequentially
And an outer ring portion area (514), wherein the connection portion area is provided.
In (513), an intermediate product having a plurality of air inlets (41) arranged in the circumferential direction is prepared, and an outer peripheral edge of the inner ring portion area (512) and an outer peripheral portion of the outer ring portion area (514) are prepared. The connecting portion area (5) is formed such that a step in the protruding direction of the protruding portion (511) is formed between the connecting portion area (5
13) a bending step of bending, and pressurizing in the direction of crushing the raised portion (511) to shift the outer peripheral edge of the inner ring portion area (512) above or below the upper surface of the outer ring portion area. The connection area (513)
A method for manufacturing a burner ring, comprising: a tilting process of tilting a hole; and a mounting hole punching process of punching the inside of the inner ring portion area (512). 3. A raised portion (511) formed on a part of a metal plate by drawing, and the raised portion (5).
11) and an inner ring portion area (512), a connecting portion area (513), and an outer ring portion area (514) which are arranged concentrically in order radially outward from the ridge portion (511). A process of manufacturing an initial processing member to be formed, and a plurality of air supply ports arranged in the circumferential direction in the connection area (513).
(41) an air supply hole punching step, and a bulging direction of the raised portion (511) between an outer peripheral edge of the inner ring portion area (512) and an inner peripheral edge of the outer ring portion area (514). The connecting portion area (5
13) a bending step of bending, and pressurizing in the direction of crushing the raised portion (511) to shift the outer peripheral edge of the inner ring portion area (512) above or below the upper surface of the outer ring portion area. The connection area (513)
A method for manufacturing a burner ring, comprising: a tilting process of tilting a hole; and a mounting hole punching process of punching the inside of the inner ring portion area (512). 4. The raised portion (511) includes a concentrically arranged inner ring portion area (512) and a connecting portion area (51).
4. A method as claimed in claim 2 or claim 3, wherein the ring is an annular ridge that surrounds a common center of the outer ring portion area and the outer ring portion. 5. The method according to claim 5, wherein the bending step includes:
(512) is a step of bending the connecting portion area (513) so as to shift the outer peripheral edge of the outer ring portion area (514) above the inner peripheral edge of the outer ring portion area (514). 513) so that the lower end of the connecting portion area (513) is located closer to the center side than the upper end.
The method for manufacturing a burner according to any one of claims 2 to 4, which is a processing step of inclining the burner ring. 6. The bending step includes the step of:
(512) is a step of bending the connecting portion area (513) so as to shift the outer peripheral edge of the outer ring portion area (514) below the inner peripheral edge of the outer ring portion area (514). 513) so that the upper end of the connecting portion area (51
3. The method according to claim 2, wherein the step (c) is a processing step of inclining the angle.
The method for manufacturing a burner according to any one of the above.