JPH08200625A - Burner cap and manufacture thereof - Google Patents

Abstract

PURPOSE: To widely form a secondary air passage in a burner cap having a soup receiving shade. CONSTITUTION: A secondary air passage 10 is provided at the center of the ringlike main body 8 of a burner cap 3, a shade 12 covering the passage 10 is interconnected via a support 11, and secondary air outlets 13 partitioned by the supports 11 are opened. When a semi-fabricated product is formed by forging, the parts of the outlets 13 are formed integrally with the supports 11 and the shade 12 inside the supports 11 as cylindrical walls. A cutting tool is inserted from the passage 10 side to bore the cylindrical wall to remove it at the time of cutting, and the outlets 13 are opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner cap attached to a burner body of a gas burner such as a gas stove.

[0002]

2. Description of the Related Art It is well known that a cap portion is attached above the secondary air passage at a distance so that the broth does not flow into the secondary air passage provided in the center of a burner cap. It is also known to form the part as an integral part extending from the main part of the burner cap (JP-A-63-3).
15815 publication).

In the above-mentioned known technique, a semi-finished product provided with a dome-shaped hollow portion having ribs projecting inward is formed by forging or casting in order to connect the cap portion, and the cylindrical wall portion of the hollow portion is formed. It is turned from the outside and removed, and the ribs and end walls inside remain as pillars and caps.

In this known technique, since the column of the cap portion is located inside the outer periphery of the cap portion, the area of the secondary air passage and the outlet cannot be made wide, and the broth that has fallen on the cap portion is not contained in the main portion. Since it drips onto a specific portion, there is a disadvantage that the internal flame port is easily clogged with broth in the case where the main flame is provided with an upward internal flame port.

[0005]

SUMMARY OF THE INVENTION It is a first object of the present invention to provide a burner cap having a wide secondary air passage and an outlet so that the secondary air can be sufficiently supplied. A second object is to obtain a structure capable of inducing the flow down of broth in the one having the above structure. A third object is to obtain a method for manufacturing each burner cap having the above configuration.

[0006]

Means for solving the first problem are described in claims 1 and 2, and
The means is a ring-shaped main body having a tooth-like portion for a flame mouth on the lower surface on the outer peripheral side and having an inner opening at the center, a cylindrical portion extending downward from the inner opening to form a secondary air passage, In a burner cap having a cap portion continuous with a pillar extending upward from the main body portion, the pillar is provided outside the cap portion in a radial direction, and an outer edge of the cap portion is continuous with an upper end of the pillar.

The means of claim 2 is the same as claim 1 or 2.
In the above, the internal flame opening that penetrates the main body portion vertically is provided between the columns.

Means for solving the second problem are as follows.
Claims 3 to 5, wherein the means of claim 3 are defined in claim 1.
Alternatively, in the second aspect, a concave portion is provided on the top surface of the cap portion, and the concave portion communicates with the upper surface of the column.

According to a fourth aspect of the present invention, in the first or second aspect, a recess is provided on the top surface of the cap portion, and a downflow guide communicating with the recess is provided on the column.

According to a fifth aspect of the present invention, in the first or second aspect, a flow-down guide is provided at a lower portion of the outer edge of the cap portion so that the column side is lowered.

Means for solving the third problem is as follows.
The means of claim 6 is the same as that of the ring-shaped main body having the tooth-like portion for the flame mouth provided on one surface of the outer peripheral side and the tooth-like portion from the inner opening of the main body portion. Of a semi-finished product having a cylindrical portion for a secondary air passage extending in a direction and a dome-shaped hollow body portion extending in a direction opposite to the cylindrical portion and having longitudinal ribs on the outer periphery, and the hollow portion And removing the cylindrical wall portion from the inside by boring and forming a secondary air outlet.

According to a seventh aspect of the present invention, the semi-finished product according to the sixth aspect is characterized in that a hollow is provided on the top surface of the hollow body, and the hollow is communicated with the upper surface of the rib.

The means of claim 8 is the semi-finished product according to claim 6, characterized in that a hollow body is provided with a recess on the top surface thereof, and the rib is provided with a downflow guide communicating with the recess. .

[0014]

According to the means of claim 1, the support of the cap portion has two
Being outside the secondary air passage, the area of the secondary air passage is not reduced by the columns, and a large amount of secondary air can be sent.

According to the means of claim 2, the internal flame port is
Since it is between the columns, the secondary air is supplied to the inner flame port without being disturbed by the columns.

According to the means of the third and fourth aspects, the broth dropped on the cap portion is received in the concave portion, flows down through the support column, and flows down at a fixed position.

According to the means of the fifth aspect, the broth that has fallen on the cap portion flows down from the outer edge thereof, but flows along the guide portion provided at the lower portion thereof toward the support pillar, and flows down along the support pillar.

According to the means of claims 6 to 8, after the semi-finished product is produced, the cylindrical wall portion of the hollow body is removed by boring to form the secondary air outlet, and at the same time, the pillar and Kasabe remains.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a gas burner used for, for example, a gas stove, which includes a burner body 2 for supplying a mixed gas and a burner cap 3. The burner body 2 is provided with a mixing pipe 4 and a gas distribution chamber 5 that opens upward. The burner body 2 is provided with a central hole 6 and a mounting surface 7 on the outer peripheral side, and the burner cap 3 is assembled to cover the gas distribution chamber 5.

The burner cap 3 has a ring-shaped main body 8
And a cylindrical portion 9 extending downward from the inner opening 8 ₁ side of the main body portion 8 to form a secondary air passage 10 together with the inner opening 8 ₁ .
The cap portion 12 is connected by three pillars 11 extending upward from the main body portion 8 so that the cap portion 12 covers the inner opening 8 ₁ to prevent the broth from falling into the secondary air passage 10. The secondary air outlet 13 is formed between the cap portion 12 and the main body portion 8 and is divided by the columns 11 and 11. As shown in FIGS. 2 and 3, each column 11 is integrally continuous with the outer edge 12 ₁ of the cap portion 12 from the outside in the radial direction.

On the lower surface of the outer peripheral side of the main body portion 8, as is well known, a tooth-shaped portion 14 provided with a deep flame hole groove and a shallow flame hole groove is projected in a ring shape, and the lower surface of the tooth-shaped portion 14 is in front. The large and small external flame ports 15 are formed so as to overlap the writing surface 7.

[0022] Then, the intermediate portion of the outer periphery and the inner opening ₈₁ of the main portion 8, which is flame port 16 bored inside which penetrates in the vertical direction, the inner flame port 16, the inner flame port 16 In order to improve the contact between the internal flame that comes out and the secondary air, from the upper surface of the main body 8 which is provided outside between the columns 11 and 11 and in order to prevent the inflow of broth, the columns 11 stand up. Raised step 8 ₂
It is provided in.

Even if the step portion 8 ₂ is not provided, the inner flame port 1
It is possible to reduce the risk of inflow of broth by removing 6 from the flow-down region of the broth flowing down the support column 11, and by disposing it as far as possible from the position on the outer side in the radial direction of the main column 11.

On the outer periphery of the lower portion of the cylindrical portion 9, there is formed a fitting portion 17 which is airtightly fitted in the central hole 6 of the burner body 2 by cutting. Reference numeral 18 in the drawing denotes a juice-preventing ridge provided on the upper surface above the installation position of the igniter (not shown), and the position of the ridge 18 is also a position avoiding the outside of the column 11.

The burner cap 3 is manufactured as a semi-finished product by forging a copper alloy, aluminum or the like at the time of manufacture, but since the secondary air outlet 13 cannot be formed at the time of forging, the secondary after-forging is performed. Cutting is performed to form the air outlet 13, and at this time, the fitting portion 17 is also cut.

In the forged product, as shown in FIG. 4, a substantially dome-shaped hollow body portion 20 that covers the inner opening 8 ₁ is continuously provided on one surface of the main body portion 8 and a cylindrical portion 9 is continuously provided on the other surface thereof. The hollow body 20 has a cylindrical wall portion 21 and an end wall 22 which becomes the cap portion 12, and the pillars are provided at three positions on the outer peripheral surface from the end wall 22 to the cylindrical wall portion 21. The rib 23 to be 11 is formed integrally in the vertical direction.

In order to open the secondary air outlet 13 and to form the cap portion 12 and the column 11 in the thus-formed semi-finished product, as shown in FIG. 4, the outer surface of the rib 23 or the main body portion 8 is formed.
Chuck the outer peripheral surface of and rotate, boring tool T ₁
Is inserted from the cylindrical portion 9 side and boring cut to the position of the imaginary line 24, the secondary air outlet 13 is opened, the end wall 22 remains as the cap portion 12, and three ribs 23 continuous with the cap portion 12 are formed.
Remains as an integral part of the main body 8 as a pillar 11, and the pillar 11 is located outside the cap portion 12.

When boring, the portion of the cylindrical wall portion 21 near the end wall 22 is left by the width W ₁ , and the portion near the main body portion 8 is width W _2.
And the thickness of the cylindrical wall portion 21 is exceeded by W ₃ and the cutting is performed along the imaginary line 24, so that the bite T ₁ and the end wall 2 are cut.
2 and the main body 8 are prevented from interfering with each other, and the secondary air outlet 13
Are completely formed. Next, the fitting portion 17 is cut on the outer peripheral surface of the cylindrical portion by the cutting tool T ₂ .

When cutting with the width W ₂ left, if the inner opening 8 ₁ side is cut with a gradient higher than the outside,
It is possible to prevent the broth transmitted along the side surface of the column 11 from flowing into the secondary air passage 10.

In this way, the column 11 is connected to the secondary air passage 10.
Since it is not inside and is located outside the secondary air passage 10, a sufficient amount of secondary air can be sent to the inner flame port 16 and the outer flame port 15 without narrowing the flow path of the secondary air. it can.

Next, in the embodiment shown in FIG. 5, a projection 30 is provided along the outer peripheral side of the upper surface of the cap 12 to form a recess 31 inside,
A groove-shaped flow-down guide 32 is formed from the top surface to the side surface of the column 11 and communicates with the recess 31. These shapes are formed by making a forging die into a corresponding shape. However, the processing of the secondary air outlet 13 and the like is the same as in the above embodiment.

As a result, the broth flowing down to the cap 12 is
Since it flows from the recess 31 through the downflow guide 32,
It flows on the main body portion 8 without flowing into the next air passage 10. Then, the inner flame port 16 deviates from falling zone of broth flowing down the flow-down guide 32 between struts 11 and 11, the stepped portion ₈₂ at a position further inner flame port 16 of the main portion 8 is provided butt Since it is provided, the broth does not flow into the internal flame port 16.

[0033] Since broth tends to flow from the struts 11 radially outward, posts 11, 11 without providing a stepped portion 8 ₂
It is difficult to flow into the internal flame port 16 between.

The column 11 has a downflow guide 32 shown in FIG.
Is not necessarily provided, and even if it has a prismatic shape as in the column shown in FIG. 3, a guide action occurs due to the adhesiveness of the broth.
However, as shown in FIG. 6, it is possible to prevent the boiling water from flowing into the secondary air passage 10 by making the fin-shaped flow-down guides 32 ₁ on both inner sides of the column 11 project wider than the valleys 31 ₁ .

In addition, the broth flowing down from the cap 12 is supported by the support 1.
As a means for guiding to 1, the downflow guide 32 ₂ can be provided by inclining the lower edge of the outer edge 12 ₁ of the cap portion 12 below the column 11 downward as shown in FIG. The cap portion 12 on which the flow-down guide 32 ₂ is provided has a concave portion 31,
It does not matter whether it is not present or not, and the broth that is about to flow down from the outer edge 12 ₁ flows along the lower edge of the flow-down guide 32 ₂ to the column 11 as shown by A, and then along the corners of the column 11 to the main body part. Run down on 8. However, this structure is difficult to make by the above-mentioned forging and boring cutting, so that it is necessary to make it by casting.

In the embodiment of FIGS. 1 to 6, the upper end surface of the column 11 is flush with the top surface of the cap portion 12 or the surface of the concave portion 31, but the top surface of the cap portion 12 is as shown in FIG. 7 or 8. Face and support 1
A step may be provided on the upper end surface 11 ₁ of _{No. 1} and the guide property for the broth is not lost even in this case.

Although the three columns 11 have been described above, the number of columns 11 may be one or a plurality of two or more.

Although the semi-finished product is made by forging in the above-mentioned respective embodiments, it is not limited to forging and can be made by various kinds of integrally forming means such as casting and sintering.

[0039]

As is apparent from the above description, according to the first aspect of the invention, since the support of the cap portion is outside the secondary air passage, the secondary air passage can be widened and a large amount can be obtained. Of 2
There is an advantage that secondary air can be supplied.

According to the second to fifth aspects of the invention, since the broth that falls on the cap portion falls down while being guided by the support post from the recessed portion on the top surface, dirt does not spread over a wide range, and the internal space between the support posts is reduced. Even in the structure having the flame opening, there is an advantage that the broth hardly flows into the inner flame opening. Further, according to the invention of claims 6 to 8, in the case where the fitting portion for the burner body is cut at the end of the cylindrical portion, the secondary air outlet and the secondary air outlet can be provided without changing the chucking of the semi-finished product. Since the fitting portion can be cut, there is an advantage that productivity is improved.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line 1-1 of FIG. 2 showing an embodiment of the present invention.

FIG. 2 Same as above

FIG. 3 is a perspective view of the same as above.

FIG. 4 is an explanatory view of a cutting process cut along line 4-4 in FIG.

FIG. 5 is a perspective view of another embodiment.

FIG. 6 is a partial perspective view of another embodiment.

FIG. 7 is a partial perspective view of another embodiment.

FIG. 8 is a partial perspective view of another embodiment.

[Explanation of symbols]

2 Burner body 3 Burner cap 8 Main part 9 Cylindrical part 10 Secondary air passage 11 Strut 12 Shaft part 12 ₁ Outer edge 13 Secondary air outlet 14 Toothed part 15 External flame port 16 Inner flame port 17 Fitting part 20 Hollow body part 21 Cylindrical wall part 22 End wall 31 Recessed part 32, 32 ₁ , 32 ₂ Downflow guide

Claims (8)

[Claims] 1. A outer peripheral side lower surface burner port (15) the inner opening ₍₈₁₎ ring-shaped main body portion having a central has teeth (14) for (8),
Internal opening ₍₈₁₎ from extending downward to form a secondary air passage (10) cylindrical portion (9), the strut extending main body section (8) upward (1
In a burner cap having a cap portion (12) continuously provided in (1), the column (11) is provided on the outer side in the radial direction of the cap portion (12), and the cap portion (1
A burner cap characterized in that the outer edge (12 ₁ ) of 2) is connected to the upper end of the column (11). 2. The burner cap according to claim 1, wherein an internal flame port (16) is formed between the columns (11, 11) so as to vertically penetrate the main body (8). 3. The burner cap according to claim 1, wherein a recess (31) is provided on the top surface of the cap portion (12), and the recess (31) communicates with the upper surface of the column (11). . 4. The downflow guide according to claim 1 or 2, wherein a recess (31) is provided on the top surface of the cap portion (12), and the recess (31) communicates with the recess (31).
A burner cap characterized in that (32) is provided on the column. 5. The flow-down guide (32 ₂ ) according to claim 1 or 2, wherein the support (11) side is lowered below the outer edge (12 ₁ ) of the cap portion (12).
Burner cap characterized by having. 6. A tooth-like portion (14) for a flame port (15) on one surface on the outer peripheral side.
And a ring-shaped main body (8), and a cylindrical portion for a secondary air passage extending from the inner opening of the main body in the same direction as the toothed portion.
A step of integrally molding a semi-finished product having (9) and a dome-shaped hollow body portion (20) extending in the opposite direction to the cylindrical portion (9) and having longitudinal ribs (23) on the outer periphery; The cylindrical wall of the body (20) (2
A method of manufacturing a burner cap, comprising the step of removing 1) from the inside by boring and forming a secondary air outlet (13). 7. The semi-finished product according to claim 6, wherein a recess (31) is provided on the top surface of the hollow body (20), and the recess (31) is provided with a rib (2).
A method for manufacturing a burner cap, characterized in that the one communicating with the upper surface of 3) is made. 8. The semi-finished product according to claim 6, wherein a recess (31) is provided on the top surface of the hollow body (20) and the recess (3) is provided on the rib (23).
A method for manufacturing a burner cap, characterized in that a burner cap (32) communicating with (1) is provided.