JP3079356B2 - Burner cap and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner cap mounted on 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 is attached above a secondary air passage at an interval so that boiling water does not flow into a secondary air passage provided at 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 (Japanese Patent Application Laid-Open No. 63-3 / 1988).
No. 15815).

In the above-mentioned known technique, a semi-finished product having a dome-shaped hollow portion having a rib protruding inward is formed by forging or casting in order to connect a cap portion continuously, and a cylindrical wall portion of the hollow portion is formed. It is removed from the outside by turning, leaving the inner ribs and end walls to form struts and caps.

[0004] In this known technique, the pillar of the cap is located inside the outer periphery of the cap, so that the area of the secondary air passage and the outlet cannot be made large, and the boiling juice falling on the cap does not allow the main part to be boiled. Since it is dropped on a specific portion, in the case where the main body portion is provided with an upward internal flame opening, there is a disadvantage that the internal flame opening is easily clogged with boiling juice.

[0005]

SUMMARY OF THE INVENTION It is a first object of the present invention to provide a burner cap having a structure in which a wide secondary air passage and an outlet are provided to sufficiently supply secondary air. A second object of the present invention is to obtain a configuration capable of inducing the flow of boiling broth in the above configuration. A third object is to obtain a method for manufacturing each burner cap having the above-described configuration.

[0006]

Means for solving the first problem are described in claims 1 and 2 and claim 1.
A ring-shaped main portion having a flame-shaped toothed portion on the outer peripheral side lower surface 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 continuously provided by a post extending upward from the main body portion, the post is provided radially outside the cap portion, and an outer edge of the cap portion is connected to an upper end of the post.

[0007] Further, the means of claim 2 is based on claim 1 or 2
, Characterized in that an internal flame opening which penetrates the main part vertically is provided between the columns.

Means for solving the second problem are as follows:
Claims 3 to 5 are provided, and the means of claim 3 corresponds to claim 1.
Or 2 is characterized in that 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 concave portion is provided on the top surface of the cap portion, and a downflow guide communicating with the concave portion is provided on the column.

A fifth aspect of the present invention is characterized in that, 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 as to lower the column side.

Means for solving the third problem are as follows:
The means of claim 6 is the same as the ring-shaped main part provided with a flame-shaped tooth part on one surface on the outer peripheral side, and the tooth-shaped part from the inner opening of the main part. Forming a semi-finished product having a cylindrical portion for a secondary air passage extending in the direction, and a dome-shaped hollow body extending in a direction opposite to the cylindrical portion and having a vertical rib on the outer periphery; Forming a secondary air outlet by removing the cylindrical wall portion from the inside by boring.

A seventh aspect of the present invention is characterized in that, in the sixth aspect, as the semi-finished product, a concave portion is provided on the top surface of the hollow body portion, and the concave portion communicates with the upper surface of the rib.

[0013] The means of claim 8 is characterized in that, in claim 6, as a semi-finished product, a hollow body is provided with a recess on the top surface and a rib is provided with a flow-down guide communicating with the recess. .

[0014]

According to the first aspect of the present invention, the support of the cap portion has two columns.
Since it is outside the secondary air passage, a large amount of secondary air can be sent without the area of the secondary air passage being reduced by the columns.

According to the second aspect of the present invention, the inner flame opening is
Since it is between the columns, the secondary air is supplied to the inner flame opening without being disturbed by the columns.

According to the means of the third and fourth aspects, the broth falling into the cap portion is received in the concave portion, flows down the support, and flows down the fixed position.

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

According to the above-mentioned means, after producing a semi-finished product, a secondary air outlet is formed by boring and removing the cylindrical wall portion of the hollow body, and at the same time, the column and the support are formed. 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 comprises 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 opened upward. The burner body 2 is provided with a center hole 6 and a mounting surface 7 on the outer peripheral side. The burner cap 3 is attached so as to cover the gas distribution chamber 5.

The burner cap 3 has a ring-shaped main body 8.
A cylindrical portion 9 extending downward from the inner opening 8 ₁ side of the main body portion 8 and forming a secondary air passage 10 with the inner opening 8 ₁ ;
It includes the connected cap portion 12 by three posts 11 extending upwardly from the main portion 8, so that the broth covers the inner opening 8 ₁ cap portion 12 is prevented from falling into the secondary air passage 10 In addition, a secondary air outlet 13 is formed between the cap portion 12 and the main body portion 8 and partitioned by the columns 11, 11. Each strut 11 is integrally and continuously from the radially outward edge 12 ₁ of the cap portion 12 as shown in FIGS.

As is well known, a toothed portion 14 having a deep flame groove and a shallow flame groove is protruded in a ring shape from the lower surface on the outer peripheral side of the main body portion 8. Large and small external flame openings 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 exiting internal flame and the secondary air, the upper surface of the main body 8 from which the support 11 rises is provided outside of the support 11 to prevent the inflow of boiling juice. Raised step 8 ₂
Is provided.

[0023] Incidentally, without providing a step portion _82, inner flame port 1
The risk of inflow of the broth can be reduced by removing the boiler 6 from the flow-down area of the broth flowing down the column 11 and, for example, by removing it as far as possible from the position outside the radial direction of the main column 11.

A fitting portion 17 is formed on the outer periphery of the lower portion of the cylindrical portion 9 by cutting so as to fit in the center hole 6 of the burner body 2 in an airtight manner. In the figure, reference numeral 18 denotes a ridge for juice stopping provided on the upper surface above the installation position of the igniter (not shown), and the position of the ridge 18 is also set to 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. However, the secondary air outlet 13 cannot be formed at the time of forging. Cutting for making the air outlet 13 is performed, and at this time, the fitting portion 17 is also cut.

The forgings, as shown in FIG. 4, the hollow body portion 20 of the substantially domed cover the inner opening ₈₁ on one side of the main portion 8 is continuously provided, the cylindrical portion 9 is continuously provided on the other surface The hollow body portion 20 has an end wall 22 that becomes the cap portion 12 integrated with a cylindrical wall portion 21, and further has the support posts at three places on the outer peripheral surface from the end wall 22 to the cylindrical wall portion 21. The rib 23 which is 11 is formed as a unit 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 semi-finished product thus formed, as shown in FIG.
Chucking and rotating the outer surface of the boring tool T ₁
Is inserted from the cylindrical portion 9 side and boring is 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 the three ribs 23 connected to the cap portion 12
Remains as a support 11 and is integral with the main body 8, and the support 11 is located outside the cap portion 12.

At the time of boring, a portion of the cylindrical wall portion 21 near the end wall 22 is left with a width W ₁ , and a portion near the main body portion 8 is width W _2.
And cutting along the imaginary line 24 beyond the thickness of the cylindrical wall portion 21 by W ₃ , the cutting tool T ₁ and the end wall 2 are cut.
2 and the main body 8 are avoided, and the secondary air outlet 13
Are completely formed. Then the fitting portion 17 is cut on the outer peripheral surface of the cylindrical portion by byte T _2.

It should be noted that when the width W ₂ is left to be cut, the inner opening 8 ₁ is cut with a gradient higher than the outer side.
The broth transmitted along the side surface of the support 11 can be prevented from flowing into the secondary air passage 10.

As described above, the support 11 is connected to the secondary air passage 10.
Because it is located outside the secondary air passage 10 and not inside, it is possible to send a sufficient amount of secondary air 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 ridge 30 is provided along the outer peripheral side of the upper surface of the cap portion 12 to form a concave portion 31 inside,
A groove-shaped flow-down guide 32 communicating with the concave portion 31 is formed from the top surface to the side surface of the column 11, and 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 previous embodiment.

As a result, the broth flowing down to the cap 12 is
Since it flows along the downflow guide 32 from the recess 31, 2
It flows on the main body 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 inner flame opening 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 inner flame opening 16.

The column 11 has a downflow guide 32 shown in FIG.
It is not always necessary to provide them, and even if they are prismatic as shown in FIG.
However, as shown in FIG. 6, the fin-shaped flow guides 32 ₁ protrude wider than the valleys 31 ₁ on both inner sides of the support 11, thereby preventing the boiling water from flowing into the secondary air passage 10.

Further, the broth flowing down from the cap portion 12 is supplied to the support 1
As a means for guiding one, it can be provided under a stream guide 32 ₂ the lower edge than the strut 11 at the outer edge 12 ₁ of the cap portion 12 is downwardly inclined as shown in FIG. Cap portion 12 to perform the flow-down guide 32 _2, which has the recess 31,
Nothing may be any, broth to be flowing down from the outer edge 12 ₁ flows to the strut 11 by transmitted a falling guide 32 ₂ of the lower edge, as shown as A, the main body portion and then transmitted to the corners of the strut 11 8. Run down. However, since this structure is difficult to produce by the forging and the boring described above, it must be produced by casting.

In the embodiment shown in FIGS. 1 to 6, the upper end surface of the pillar 11 is flush with the top surface of the cap portion 12 or the surface of the concave portion 31, but as shown in FIG. Surface and strut 1
A step may be provided on the upper end surface 11 ₁ of the unit ₁ , and even in this case, the guideability for the broth is not lost.

Although the above description has been made of the case where the number of the columns 11 is three, the number of the columns 11 may be one or more than two.

In each of the above embodiments, the semi-finished product is described as being made by forging. However, the present invention is not limited to forging, and can be made by various integral molding means such as casting and sintering.

[0039]

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

According to the second to fifth aspects of the present invention, the broth falling into the cap portion is guided by the pillar from the concave portion on the top surface and falls, so that the dirt does not spread over a wide area, and the inside between the pillars does not spread. Even in the configuration in which the flame port is provided, there is an advantage that the broth hardly flows into the internal flame port. According to the invention of claims 6 to 8, in the cutting of the fitting portion to the burner body at the end of the cylindrical portion, the secondary air outlet is provided without changing the chucking of the semi-finished product. There is an advantage that productivity can be improved because the fitting part can be cut.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the same.

FIG. 3 is a perspective view of the same.

FIG. 4 is an explanatory view of a cutting process taken along line 4-4 in FIG. 2;

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]

Reference Signs List 2 burner body 3 burner cap 8 main part 9 cylindrical part 10 secondary air passage 11 support 12 cap part 12 ₁ outer edge 13 secondary air outlet 14 toothed part 15 outer flame port 16 inner flame port 17 fitting part 20 hollow body part 21 cylindrical wall part 22 end wall 31 concave part 32, 32 ₁ , 32 ₂ downflow guide

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-7-269855 (JP, A) JP-A-5-71624 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F23D 14/06

Claims (8)

(57) [Claims] 1. A ring-shaped main part (8) having a toothed part (14) for a flame port (15) on the lower surface on the outer peripheral side and having an inner opening (8 ₁ ) at the center;
A cylindrical portion (9) extending downward from the inner opening (8 ₁ ) to form a secondary air passage (10); and a column (1) extending upward from the main portion (8).
In a burner cap having a cap portion (12) continuously provided in (1), the support (11) is provided radially outside the cap portion (12), and the cap portion (1) is provided.
A burner cap characterized in that the outer edge (12 ₁ ) of 2) is continuous with the upper end of the column (11). 2. The burner cap according to claim 1, further comprising an internal flame opening (16) vertically penetrating the main body (8) between the columns (11, 11). 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. A downflow guide according to claim 1, wherein a concave portion (31) is provided on a top surface of the cap portion (12), and the concave portion (31) communicates with the concave portion (31).
A burner cap characterized in that (32) is provided on a support. 5. A downflow 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 the provision of. 6. A toothed portion (14) for a flame outlet (15) on one surface on the outer peripheral side.
Ring-shaped main part (8) provided with a cylindrical part for a secondary air passage extending from the inner opening of the main part in the same direction as the tooth-shaped part
(9) and a step of integrally molding a semi-finished product having a dome-shaped hollow body portion (20) extending in a direction opposite to the cylindrical portion (9) and having a longitudinal rib (23) on the outer periphery; The cylindrical wall of the body (20) (2
Forming a secondary air outlet (13) by boring from inside 1) to form a secondary air outlet (13). 7. The semi-finished product according to claim 6, wherein a concave portion (31) is provided on the top surface of the hollow body portion (20), and the concave portion (31) is
3) A method for manufacturing a burner cap, characterized in that the method described in 3) above is used to make a product connected to the upper surface. 8. The hollow product (20) according to claim 6, wherein a concave portion (31) is provided on the top surface of the hollow body portion (20), and the concave portion (3) is provided in the rib (23).
A method for producing a burner cap, characterized in that a method is provided in which a downflow guide (32) communicating with 1) is provided.