JP3701488B2 - Gas burner and method for producing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a burner for a gas stove and a method for producing the same.
[0002]
[Prior art]
As a gas stove burner, there is a configuration in which a cylindrical burner head provided with a flame hole is placed on a burner body connected to a mixing tube for sending an air-fuel mixture to the burner. As a burner head, there is a burner head in which a cylindrical body having a flange portion at a lower end is formed with an appropriate number of horizontal slits and vertical slits of a predetermined length used as flame holes. And as a manufacturing method of a burner head, there are a method by forging and a method of manufacturing by forming a horizontal slit or a vertical slit at a predetermined position of a cylindrical intermediate molded product obtained by cutting a cylindrical material.
[0003]
[Problems to be solved by the invention]
However, in the case of forging, a die is necessary. Therefore, in the case of a small lot product, the manufacturing cost becomes considerably high due to the influence of the mold manufacturing cost. Further, in the latter manufacturing method, it is necessary to form the required number of flame holes in the cylindrical portion one by one with a cutter or the like, and at the time of cutting the column material into a cylindrical intermediate molded product, Since it is necessary to cut out the part, processing takes time, and the manufacturing cost is considerably increased.
[0004]
In view of such problems, it is an object of the present invention to provide a burner having a low manufacturing cost and a manufacturing method thereof.
[0009]
[Means for Solving the Problems]
In order to solve such a problem, according to the invention described in claim 1 , a burner head having a flame hole is placed on a burner body to which an air-fuel mixture from a mixing pipe is fed, and an opening provided in an upper portion of the burner head. In a gas stove burner in which a burner cap that covers the burner is placed on the burner head, the burner head is one of a plurality of ribs extending in the extending direction of the cylindrical portion on either the inner side surface or the outer side surface of the cylindrical portion. A peripheral wall body that is fixed to the other side and extends in the extending direction is fixed to the other side of each rib, and a gap extending in the extending direction is provided between adjacent peripheral wall bodies.
[0010]
Since each peripheral wall body is integrated via the rib and the cylindrical portion, a gap over the entire length in the extending direction of the burner head can be formed between the peripheral wall bodies, and the positions of both ends of the gap and the finishing process become unnecessary. Therefore, it can process rapidly and easily compared with the past, and can reduce manufacturing cost.
[0011]
The invention according to claim 2 for solving the above-mentioned problem is a method for producing a burner for a gas stove characterized by the method for producing a burner head according to claim 1 . That is, one side of a plurality of ribs extending in the extending direction of the cylinder part is fixed to either the inner side surface or the outer side surface of the cylinder part, and the cylindrical part extending in the extending direction is fixed to the other side of each rib. A step of extruding or drawing a material having a groove extending in the extending direction on the rib side surface of the cylindrical portion, a step of cutting the material into an appropriate length to form an intermediate product, and a groove The burner head is manufactured by a step of cutting from the side surface on the back side of the provided side surface to form a gap in the groove portion.
[0012]
According to the present invention, it is difficult to manufacture a burner head having such a structure in a manufacturing method in which a flame hole is formed in a cylindrical portion formed by hollowing out the inside of a cylindrical material. The burner head can be easily manufactured by cutting with a lathe, and the manufacturing cost can be reduced. Further, since a die is not required as compared with the case of forging, the manufacturing cost can be reduced particularly in the case of a small lot product.
[0013]
Further, the invention according to claim 3 for solving the above problem is also a method for producing a burner for a gas stove characterized by the method for producing a burner head according to claim 1 . That is, one side of the plurality of ribs extending in the extending direction of the cylindrical portion is fixed to either the cylindrical portion or the inner side surface or the outer side surface of the cylindrical portion, and the peripheral wall body extends in the extending direction to the other side of each rib. Is manufactured, and a burner head is manufactured by a process of extruding or drawing a material having a gap extending in the extending direction between adjacent peripheral wall bodies, and a process of cutting the material to an appropriate length. It is characterized by doing.
[0014]
In this way, a burner head can be manufactured simply by forming a material by extrusion molding or pultrusion, and cutting the material to an appropriate length, so there is no need to form a gap by cutting. Can be made quicker and easier, and the manufacturing cost can be further reduced.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIGS. 1 and 2, reference numeral 1 denotes a gas stove burner having an outward flame hole, and an annular burner body 11 to which a mixing tube 2 for sending an air-fuel mixture to the burner 1 is connected. The cylindrical burner head 12 is placed on the burner body 11, and the burner cap 13 is placed on the burner head 12. The burner body 11 and the mixing tube 2 are integrally formed of sheet metal.
[0016]
The burner head 12 includes a cylindrical portion 21 and a column portion 22 formed on the inner surface of the cylindrical portion 21. The column part 22 is extended in the up-down direction (extending direction) in FIG. 1 of the cylindrical part 21, and is formed in six places at equal intervals. Six cylindrical slits (gap) 23 extending in the circumferential direction are formed in the cylindrical portion 21. The horizontal slit 23 penetrates from the inner side to the outer side of the cylindrical portion 21 except for the column portion 22 and functions as a flame hole. That is, the cylindrical portion 21 is composed of a plurality of cylindrical pieces 21 a arranged coaxially with the horizontal slit 23 therebetween. The lowermost cylindrical piece 21 a is integrated with the pedestal portion 21 b at the lower end of the cylindrical portion 21. The air-fuel mixture sent from the mixing pipe 2 to the burner 1 is ejected from the transverse slit 23 around the cylindrical portion 21 and burned. Further, the lateral slit 23 has a stepped shape with a wide outer side. When stepped, even if the slit width on the outer surface of the cylindrical portion 21 is the same, flame lift is less likely to occur than when no step is provided.
[0017]
The burner cap 13 includes a central cylindrical body 31 and a flange portion 32 that is formed at the upper end of the cylindrical body 31 and expands toward the upper end. When the burner cap 13 is placed on the burner head 12, the lower portion of the cylindrical body 31 is fitted into the central opening 11 a at the lower portion of the burner body 11, and the air passage 14 extending vertically is formed in the central portion of the burner 1. At the same time, the lower surface of the outer peripheral portion of the flange portion 32 comes into contact with the upper end of the burner head 12. The air passage 14 supplies secondary air to the air-fuel mixture ejected from the lateral slit 23. Further, an annular recess 32a into which the upper end of the burner head 12 is fitted is formed on the lower surface of the outer peripheral portion of the flange portion 32, and gas leakage at the contact portion is prevented.
[0018]
Next, a method for manufacturing the burner head 12 will be described. First, a material including the cylindrical portion 21 and the column portion 22 is formed by extrusion molding or pultrusion molding, and the material is cut into an appropriate length with a lathe and cut into a predetermined shape to obtain an intermediate product (see FIG. (Not shown). The intermediate product has a shape in which the horizontal slit 23 is not formed in the burner head 12. Then, the cylindrical portion 21 of the intermediate product is cut from the outside with a lathe to form the horizontal slit 23 and the pedestal portion 21b, and the shape of the outer surface is adjusted. At this time, the column portion 22 is not cut. Further, the horizontal slits 23 are widened from the outside of the cylindrical portion 21 by using a lathe so that each horizontal slit 23 has a stepped shape.
[0019]
If it does in this way, the process from cutting of a raw material to making the horizontal slit 23 into a stepped shape can be easily and quickly performed as a series of steps on a lathe. In addition, the shape of a flame hole can be variously set by selecting suitably the number and width | variety of the horizontal slit 23 or the column part 22. FIG. Further, when the column part is formed on the outer surface of the cylindrical part 21, it is processed with a lathe from the inside corresponding to the cylindrical part 21 of the intermediate product to form the horizontal slit 23 and the lateral slit 23 is widened from the inner side. To make a stepped shape.
[0020]
Thus, since the burner head can be manufactured by extrusion molding or pultrusion molding and cutting by a lathe, the manufacturing cost can be reduced particularly when the burner is a small lot product compared to forging that requires a die. In addition, the cylindrical portion is not formed by hollowing out the inside of the column material, and the column portion can be easily formed, so that it can be processed quickly and the manufacturing cost can be reduced. In addition, since the amount of cutting will reduce if there is no hollowing, the amount of waste materials will reduce and manufacturing cost can be made low.
[0021]
Further, after forming the intermediate product, a burner head having a vertical slit may be manufactured by forming a vertical slit extending downward from the upper end of the cylindrical portion 21. In this case, the column portion 22 is not necessary. Therefore, after forming a simple cylindrical intermediate product (not shown) having no column part and then forming a vertical slit extending downward from the upper end of the intermediate product, as shown in FIGS. The burner head 4 having a shape in which the vertical slit 42 extending in the vertical direction is formed in the cylindrical portion 41 is manufactured. The vertical slit 42 is formed not by a lathe but by a cutter or the like. In this case, the vertical slit 42 as a flame hole cannot be formed with a lathe, but since the hollow inside the cylinder is not necessary, it can be processed quickly and the amount of waste material is reduced, which can reduce the manufacturing cost compared to the conventional case. it can.
[0022]
FIG. 4 is a burner head 5 of a burner with an outward flame hole according to another embodiment. The burner head 5 includes a cylindrical portion 51, a plurality of ribs 52 that are integrated on the outer surface of the cylindrical portion 51, and a peripheral wall body 53 a that is integrated on an outer end that is the other side of the rib 52. It is composed of Each rib 52 and the peripheral wall 53a extend in the vertical direction (extending direction) of the cylindrical portion 51 in FIG. A vertical slit (gap) 54 is formed between adjacent peripheral wall bodies 53a as a flame hole extending in the vertical direction. 4B is a burner cap which closes the upper end opening of the burner head 5, and is fitted in the center opening 11a at the lower portion of the burner body 11 to form an air passage 14 (see FIG. 1). The cylinder part 6a opened up and down is provided. The lower surface of the burner cap 6 is formed with a recess 6b into which the upper end of the cylindrical portion 51 of the burner head 5 and the peripheral wall body 53a are fitted to prevent gas leakage.
[0023]
Next, a method for manufacturing the burner head 5 will be described. First, the intermediate product M shown in FIG. 5 is formed. Specifically, a material in which the cylindrical portions 51 and 53 and the rib 52 are integrated is formed by extrusion molding or pultrusion molding, and the material is cut into an appropriate length with a lathe and the outer cylindrical portion 53 is formed. The intermediate product M is formed by adjusting the shape of the outer surface and the cut surface. Between the ribs 52 of the outer cylindrical portion 53, a bulging portion 53b bulging outward is formed. The outer cylindrical portion 53 has a constant thickness including the bulging portion 53b, and a groove 53m extending in the vertical direction is formed on the inner surface of the outer cylindrical portion 53 on the back side of the bulging portion 53b. ing. Subsequently, the bulging portion 53b is cut from the outside of the outer cylindrical portion 53 with a lathe. Then, the outer cylindrical portion 53 is cut at the portion of the groove 53m to form a plurality of peripheral wall bodies 53a supported by the ribs 52, and a vertical slit 54 is formed between the peripheral wall bodies 53a. Is manufactured. Therefore, the processing from the cutting of the material to the formation of the peripheral wall body 53a and the vertical slit 54 can be easily and quickly performed with a lathe as a series of steps.
[0024]
Since the cylindrical part is not formed by hollowing out the inside of the cylindrical material and the column part can be easily formed, it can be quickly processed and the manufacturing cost can be reduced. In addition, since the amount of cutting will reduce if there is no hollowing, the amount of waste materials will reduce and manufacturing cost can be made low.
[0025]
In the manufacturing method in which a flame hole is formed in a cylindrical portion formed by hollowing out the inside of a cylindrical material, it is difficult to manufacture a burner head having such a configuration, but in this way, extrusion molding or pultrusion molding can be performed. Burner heads can be manufactured by cutting with a lathe. In addition, the manufacturing cost can be reduced particularly when the burner is a small lot product as compared with the case of forging that requires a die.
[0026]
As shown in FIG. 6, if the narrowed portion 53 s is provided at the open end of the groove 53 m of the intermediate product M, the vertical slit 54 is stepped when the end of the bulged portion 53 b is cut with a lathe. And lift is less likely to occur.
[0027]
Further, as in the present embodiment, if the bulging height of the bulging portion 53b is set higher than the thickness of the cylindrical portion 53, the bulging is formed on both edges of the vertical slit 54 when the vertical slit 54 is formed. Although the base end portion of the portion 53b serves as a bent portion 54a and the remaining burner head 5 is reinforced, as shown in FIG. 7, the intermediate product M may be provided with only the groove 53m and not the bulging portion. Good. When the intermediate product M having such a shape is used, when the vertical slit 54 is formed by cutting the cylindrical portion 53 from the outside to the position indicated by the two-dot chain line over the entire length in the vertical direction with a lathe, The outer cylindrical portion 53 can be continuously cut until it is formed, and the impact applied to the cutting tool (chip) can be reduced.
[0028]
An intermediate product having a groove extending in the vertical direction on the outer surface of the inner cylindrical portion 51 is manufactured, and the inner cylindrical portion 51 is cut from the inner side to form an open portion such as a vertical slit in the groove portion. If it does so, it is possible to manufacture the burner head for burners provided with an inward flame hole.
[0029]
Incidentally, the vertical slit 54 of the burner head 5 shown in FIG. 4 extends in the vertical direction, that is, the molding direction at the time of extrusion molding or pultrusion molding. Therefore, only by extrusion or pultrusion, can be molded material having the same shape as the sectional shape shown in FIG. 4 (A), can be produced burner head 5 by simply cutting the material to a suitable length. According to this, since it is not necessary to cut the cylindrical portion with a lathe to form a vertical slit, the manufacturing becomes easier and the manufacturing cost can be reduced.
[0030]
【The invention's effect】
According to the present invention, as can be seen from the above description, the manufacturing cost of the gas stove burner can be reduced.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a burner using a burner head manufactured by the manufacturing method of the present invention. FIG. 2A is a plan view showing the burner head, and FIG. FIG. 3A is a plan view showing a burner head of another form, and FIG. 4B is a side view showing a section of the burner head. FIG. 4A is a plan view showing a burner head of another form. FIG. 5B is a side view showing the cross section. FIG. 5 is a perspective view showing the intermediate product formed in the manufacturing process. FIG. 6 is a plan view of the main part of the burner head showing another form of the groove of the intermediate product. FIG. 7 is a plan view of the main part of the burner head showing still another form of the groove of the intermediate product.
DESCRIPTION OF SYMBOLS 1 Burner 2 Mixing pipe 11 Burner body 12 Burner head 13 Burner cap 21 Cylindrical part 21a Cylindrical piece 22 Column part 23 Horizontal slit (gap)
51, 53 Cylindrical portion 52 Rib 53a Circumferential wall body 53m Groove 54 Vertical slit (gap)
M Intermediate product

Claims (3)

A burner head with a flame hole is placed on the burner body to which the air-fuel mixture from the mixing tube is sent, and a burner cap that closes the opening at the top of the burner head is placed on the burner head. In
In the burner head, one side of a plurality of ribs extending in the extending direction of the cylindrical portion is fixed to either the inner side surface or the outer side surface of the cylindrical portion, and a peripheral wall body extending in the extending direction to the other side of each rib. A burner for a gas stove, which is fixed and has a gap extending in the extending direction between adjacent peripheral wall bodies. A burner head with a flame hole is placed on the burner body to which the air-fuel mixture from the mixing tube is sent, and a burner cap that closes the opening at the top of the burner head is placed on the burner head. In the manufacturing method of
One side of a plurality of ribs extending in the extending direction of the cylindrical part is fixed to either the inner side surface or the outer side surface of the cylindrical part, and another cylindrical part extending in the extending direction to the other side of each rib. Are formed by extruding or drawing a material having a groove extending in the extending direction on the rib side surface of the cylindrical portion, and forming an intermediate product by cutting the material to an appropriate length And a step of cutting from the side surface on the back side of the side surface provided with the groove to form a gap in the groove portion, and a method for manufacturing a burner for a gas stove. A burner head with a flame hole is placed on the burner body to which the air-fuel mixture from the mixing tube is sent, and a burner cap that closes the opening at the top of the burner head is placed on the burner head. In the manufacturing method of
The burner head has one side of a plurality of ribs extending in the extending direction of the cylindrical portion fixed to either the cylindrical portion or the inner side surface or the outer side surface of the cylindrical portion and extends in the extending direction to the other side of each rib. The peripheral wall body is fixed and manufactured by an extrusion molding or pultrusion process of a material having a gap extending in the extending direction between adjacent peripheral wall bodies, and a process of cutting the material into an appropriate length. A method for producing a burner for a gas stove characterized by the above.

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