JP4344291B2 - Attachment structure of attached parts to gas stove burner - Google Patents

Description

  The present invention relates to a structure for attaching accessory parts such as a spark plug and a thermocouple to a gas stove burner.

  Conventionally, the gas stove burner 1 communicates with the mixing chamber 16 and a burner body 13 having a mixing chamber 16 for mixing gas and primary air to obtain an air-fuel mixture as shown in FIG. The burner cap 14 is provided with a flame hole 17 for injecting an air-fuel mixture and an ignition chamber 38 for generating a flame in the air-fuel mixture of the flame hole 17 and a cover 15 attached to the burner cap 14. 13 is formed by placing the burner cap 14 on the burner body 13 after restricting the position by locking the latched portion provided on the burner cap 14 with the latched portion provided on the burner cap 13. The gas stove burner 1 is provided with accessory parts 2 such as a spark plug 2a and a thermocouple 2b serving as a safety device. For example, the spark plug 2a has a predetermined discharge electrode 41 with respect to the target electrode 38c so as to stably generate a spark between the discharge electrode 41 provided at the tip thereof and the target electrode 38c provided in the ignition chamber 38. It is attached to the gas stove burner 1 in the position. In attaching the accessory part 2 such as the spark plug 2a to the gas stove burner 1, the accessory part 2 is attached to the mounting bracket 60 as shown in FIG. 13, and the mounting bracket 60 is attached to the gas stove burner 1. It was performed by attaching (for example, refer patent document 1 and patent document 2). In detail, the spark plug 2a and the thermocouple 2b are arranged at appropriate positions on the mounting bracket 60, and the mounting bracket is mounted while the spring-like wire 61 is hung around the spark plug 2a and the thermocouple 2b as shown in the figure. The spark plug 2 a and the thermocouple 2 b are attached to the mounting bracket 60 by being latched to 60.

However, when the accessory part 2 is attached to the gas stove burner 1 by this attachment structure, the attachment error of the accessory part 2 to the mounting bracket 60 and the mounting error of the mounting bracket 60 to the gas stove burner 1 are as follows. As a result, there is a structure that causes a large mounting error between the accessory part 2 and the gas stove burner 1, and the attachment accuracy of the accessory part 2 to the gas stove burner 1 is improved. There was a problem that it was difficult to secure. In addition, even when the accessory part 2 is attached to the gas stove burner 1, the attachment part 60 is attached to the attachment bracket 60 using the wire 61 and the attachment bracket 60 is attached to the gas stove burner. 1 is attached to the gas stove burner 1, so that the workability of attaching the accessory part 2 to the gas stove burner 1 is not good, especially when the accessory part 2 is replaced due to wear or failure. Was even more complicated.
JP 11-264544 A JP 2000-283414 A

  The present invention has been invented in view of the above-described conventional problems, and can ensure good attachment accuracy of the accessory parts to the gas stove burner and can be used to attach the accessory parts to the gas stove burner. It is an object of the present invention to provide a structure for attaching an accessory part to a gas stove burner that can improve the workability.

  In order to solve the above-mentioned problem, the attachment structure of the accessory part to the gas stove burner according to claim 1 of the present invention has a spark plug 2a and a thermocouple 2b in the storage space 3 provided in the gas stove burner 1. A rod-like accessory part 2 such as a pipe is disposed, and the tip of the accessory part 2 is inserted into a through hole 4 continuously provided in the storage space 3 so that the inner side of the storage space 3 of the gas stove burner 1 is inward. And the spring member 7 is attached to the gas stove burner 1 so as to face the inner surface of the storage space 3 at a portion facing the engagement protrusion 6, and is attached to the side surface of the accessory part 2. An engagement recess 8 that is recessed in the radial direction is formed, and the accessory part 2 disposed in the storage space 3 is urged toward the engagement protrusion 6 by the spring material 7 to engage the engagement protrusion 6 and the engagement recess 8. Is engaged. According to this, the accessory parts 2 such as the spark plug 2a and the thermocouple 2b are positioned in the radial direction by inserting their tip portions into the through holes 4 of the gas stove burner 1, and for the gas stove. By urging the spring member 7 attached to the burner 1, the engaging recess 8 is engaged with the engaging protrusion 6 of the gas stove burner 1, thereby positioning in the axial direction. Since the conventional accessory part 2 is attached to the mounting bracket 60 and the mounting bracket 60 is attached to the gas stove burner 1, the accessory part 2 is attached to the gas stove burner 1. Compared to the above, it is possible to suppress the mounting error and ensure good mounting accuracy of the accessory part 2 to the gas stove burner 1, and the workability of attaching the accessory part 2 to the gas stove burner 1 is also improved. Can improve .

  The attachment structure of the accessory part to the gas stove burner according to claim 2 is such that a rod-like accessory part 2 such as a spark plug 2a or a thermocouple 2b is provided in the storage space 3 provided in the gas stove burner 1. The tip of the accessory part 2 is fitted and inserted into the through-hole 4 continuously provided in the storage space 3, and the engagement protrusion 6 protrudes inward from the inner surface of the storage space 3 of the gas stove burner 1. At the same time, the spring material 7 is attached to the gas stove burner 1 so as to face the inner surface of the storage space 3 at the portion facing the engaging protrusion 6, and is recessed inwardly from the side surface of the accessory part 2. An engaging surface 8a facing the base end direction of the accessory part 2 is formed, and the abutting protrusion 5 protrudes radially outward from the engaging surface 8a on the side surface of the accessory part 2 in the radial direction. The front end surface of the portion 5 and the hole edge of the through hole 4 in the inner surface of the storage space 3 are arranged to face each other, and the storage space 3 The attached accessory part 2 is biased by the spring material 7 toward the engagement protrusion 6 and the surface 6b of the engagement protrusion 6 facing the distal direction of the accessory part 2 and the engagement face 8a are arranged to face each other. To do. According to this, the accessory parts 2 such as the spark plug 2a and the thermocouple 2b are positioned in the radial direction by inserting their tip portions into the through holes 4 of the gas stove burner 1, and The contact protrusion of the accessory part 2 that receives the bias of the spring material 7 of the gas stove burner 1 is formed by the hole edge of the through hole 4 on the inner surface and the surface 6b of the engagement protrusion 6 facing the tip of the accessory part 2. Since the front end surface 5a of the part 5 and the engaging surface 8a recessed in the side surface of the accessory part 2 can be sandwiched and positioned in the axial direction, it can be directly attached to the gas stove burner 1. By attaching the accessory part 2 to the mounting bracket 60 and attaching the mounting bracket 60 to the gas stove burner 1, the mounting error can be suppressed compared to the accessory part 2 attached to the gas stove burner 1. Let the gas hob for the accessory part 2 It is possible to ensure good mounting accuracy of the Na 1, thereby improving workability of mounting and replacement work on the gas stove burner 1 annexed part 2. Further, when the accessory part 2 is inserted into the housing space 3 from the tip so that the tip is fitted into the through-hole 4, the contact protrusion 5 that abuts the edge of the through-hole 4 serves as a stopper. The function can secure the placement of the accessory part 2 in the storage space 3 at an appropriate position, and the placement work of the accessory part 2 in the storage space 3 can be facilitated.

  The attachment structure of the accessory part to the gas stove burner according to claim 3 is the structure according to claim 1 or 2, wherein the spring material 7 is constituted by a linear spring material 7a and is stored at both ends of the storage space 3. An insertion hole 9 that opens to the inner surface of the cavity 3 is formed in a straight line, and both ends in the longitudinal direction of the linear spring material 7a are fitted into both the insertion holes 9, and the longitudinal center of the linear spring material 7a is fitted. It is characterized in that the section is bridged between the inner surfaces of the storage space 3. According to this, a simple linear spring material 7 a can be used as the spring material 7, and the structure of the attachment structure of the accessory part 2 to the gas stove burner 1 is simplified. The productivity of the filter burner 1 can be improved. In addition, since the elastic reaction force from the accessory part 2 received at the central portion in the longitudinal direction of the linear spring material 7a can be supported by the gas stove burner 1 at both longitudinal ends of the linear spring material 7a, That is, the linear spring material 7a can be supported by the gas roller burner 1 by both ends, and the elastic performance of the linear spring material 7a can be structurally improved, and the linear spring material 7a can be prevented from sagging.

  According to a fourth aspect of the present invention, there is provided the attachment structure for attaching an accessory part to a gas stove burner according to any one of the first to third aspects, wherein the tip of the spark plug 2a as the accessory part 2 has a smaller outer diameter. A tapered surface 10 is provided. According to this, when the accessory part 2 is passed between the engagement protrusion 6 and the spring material 7 from the tip thereof and disposed in the storage space 3, the spring material 7 is gradually moved by the tapered surface 10 of the accessory part 2. It is possible to push and expand, and the insertion arrangement of the accessory part 2 into the storage space 3 can be performed smoothly. Further, since the spring material 7 elastically contacting the tapered surface 10 urges the accessory part 2 in the proximal direction, the engagement surface 8a of the urged accessory part 2 and the attachment part 2 at the engagement protrusion 6 The axial positioning of the accessory part 2 can be performed by contact with the surface 6b facing the front end direction. Therefore, for example, it is possible to eliminate the restriction that the shapes of the engagement protrusion 6 and the engagement recess 8 can be completely matched, or the front end surface 5a of the contact protrusion 5 and the engagement surface of the accessory part 2 can be eliminated. It is possible to eliminate the restriction that the distance between the hole edge of the through hole 4 on the inner surface of the storage space 3 and the surface 6b of the engaging projection 6 facing the distal end direction of the accessory part 2 strictly coincides with the distance to 8a. In other words, the dimensional tolerance between the gas stove burner 1 and the accessory part 2 can be expanded, the structure of the attachment structure of the accessory part 2 to the gas stove burner 1 is simplified, and as a result, the accessory part 2 The productivity of the gas stove burner 1 attached with can be improved.

  Further, in the attachment structure of the accessory part to the gas stove burner according to claim 5, the taper surface 10 and the contact protrusion 5 are provided side by side in the same circumferential direction of the spark plug 2a. It is characterized by. According to this, the taper surface 10 can be applied to the spring material 7 only by rotating the accessory part 2 in the circumferential direction, and the insertion arrangement of the accessory part 2 into the storage space 3 can be performed more smoothly. . Further, when the tapered surface 10 is formed so as to reduce the outer diameter of the spark plug 2a while leaving a part of the side surface of the accessory part 2 in the circumferential direction, the remaining portion becomes a portion protruding in the radial direction from the surface of the tapered surface 10. Thus, the contact protrusion 5 having the same diameter as the outer diameter of the spark plug 2a can be formed, that is, the taper surface 10 and the contact protrusion while suppressing an increase in the outer diameter of the contact protrusion 5 with respect to the spark plug 2a. 5 can be arranged in parallel in the same circumferential direction of the spark plug 2a, and the manufacturability of the accessory part 2 can be improved.

  According to a sixth aspect of the present invention, there is provided an attachment structure for attaching an accessory part to a gas stove burner according to any one of the first to fifth aspects, wherein the burner body 13 constituting the gas stove burner 1 together with the burner cap 14 is provided. When the upper and lower housings 13a and 13b are joined and integrated, the housing cavity 3 and the through hole 4 are formed in the upper housing 13a, and the engaging protrusion 6 is formed in the lower housing 13b, and the upper and lower housings 13a and 13b are joined. In addition, the engaging projection 6 faces the storage space 3 and the spring material 7 is attached to the burner body 13 with the spring material 7 sandwiched between the joint surfaces of the upper and lower housings 13a and 13b. To do. According to this, all the configurations on the gas stove burner 1 side in the attachment structure of the accessory part 2 to the gas stove burner 1 can be provided by simply joining the upper and lower housings 13a and 13b constituting the burner body 13. Therefore, the structure of the attachment structure of the accessory part 2 to the gas stove burner 1 can be simplified, and as a result, the productivity of the gas stove burner 1 attached with the accessory part 2 can be improved.

  In the present invention, since accessory parts such as a spark plug and a thermocouple can be directly attached to the gas stove burner, compared with conventional parts attached to the gas stove burner via a mounting bracket. It is possible to reduce the mounting error, ensure good mounting accuracy of the attached parts to the gas stove burner, and improve the workability of attaching and replacing the attached parts to the gas stove burner. Have. In addition, attachment of the accessory part to the gas stove burner can be performed with the accessory part positioned in the radial direction and axial direction, so that the accessory part is placed at a predetermined position of the gas stove burner. It has an effect that it can be easily and accurately attached.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  As shown in FIG. 2, the gas cooker 11 of this example has a large, medium, and small gas stove 12 (large gas stove 12a, medium gas stove 12b, and small gas stove 12c as shown in FIG. ), And each gas stove burner 1 constituting each gas stove 12 has a flame generating part for burning an air-fuel mixture of gas and air to generate an annular flame. The gas cooker 11 is located in the upper part and is internally installed. Here, each gas stove burner 1 constituting the large, medium, and small gas stoves 12 has the same basic structure although the diameter of the flame generating portion is different, and will be described in detail below.

  As shown in FIGS. 3 and 4, the gas stove burner 1 includes a burner body 13 having a mixing chamber 16 in which gas and primary air are mixed, and a burner cap having a flame hole 17 serving as a flame generating portion. 14 and a substantially horizontal disk-shaped cover 15 attached to the burner cap 14 so as to cover substantially the entire upper surface of the burner cap 14 above the burner cap 14.

  The burner body 13 is formed by integrating upper and lower housings 13a and 13b made of aluminum die cast, and an annular mixing chamber 16 is provided so as to form an upper and lower opening 18 that opens up and down. The mixing chamber 16 communicates with the distal end of a mixing tube 19 whose base end is open. Specifically, the mixing chamber 16 includes an inner cylindrical portion 20 that forms an upper and lower opening 18 therein, an outer cylindrical portion 21 that covers the inner cylindrical portion 20 from the radially outer side of the burner body 13, and the inner cylindrical portion 20 and the outer cylindrical portion 21. It is an annular space portion that opens upward and is surrounded by a lower surface portion 22 that connects the lower ends. An inclined surface 23 is formed on the lower surface portion 22 of the mixing chamber 16 so as to be gradually positioned upward from the end portion on the side where the mixing tube 19 is connected to the end portion on the opposite side. That is, the upper and lower openings 18 of the burner body 13 are formed so as to open not only downward but also to the side at the lower part. Further, a gas nozzle 24 for supplying a gas is disposed so as to face the opening at the base end of the mixing tube 19. When the gas is supplied from the gas nozzle 24, the primary flow from the opening of the mixing tube 19 is caused by the gas flowing into the mixing tube 19. Air is sucked so that gas and primary air are mixed in the mixing tube 19 and the mixing chamber 16. A mixing chamber 16 is opened upward on the upper surface of the burner body 13, and a burner cap 14 is placed on the upper opening edge of the mixing chamber 16 formed by the upper end surfaces of the inner cylinder portion 20 and the outer cylinder portion 21. An annular planar mounting surface 25 is provided. And the recessed step part 25a made one step lower is formed in the outer edge part of the mounting surface 25 which the upper end surface of the outer cylinder part 21 comprises. In addition, a flange base portion 26 is formed at a position below the outer edge portion of the mounting surface 25 so as to project outward in the radial direction of the burner body 13. A burner main body is positioned below the outer edge portion of the flange base portion 26. The outer edge step part 27 which protrudes toward 13 radial outward directions is provided. A packing 28 is disposed on the outer edge step portion 27.

  The burner body 13 is mounted on the bottom plate of the gas cooker 11 and is mounted on the gas cooker 11. The upper portion of the burner body 13 protrudes from the top plate 11 a of the gas cooker 11. Placed in. Here, the top plate 11a of the gas cooker 11 is formed of a material such as glass, and the top plate 11a is provided with a through hole 29 for inserting and arranging the upper portion of the gas stove burner 1. Yes. The burner body 13 inserted into the through hole 29 is fixed to the top plate 11 a via a burner ring 30 attached to the edge of the through hole 4. Specifically, the burner ring 30 and the top plate 11a are fixed in a watertight structure via a packing 31 provided on the burner ring 30, and the burner body 13 and the burner ring 30 are watertight via a packing 28 provided on the burner body 13. The burner body 13 and the top plate 11a are fixed in a watertight structure. The virtue 32 is placed on the top plate 11 a of the gas cooker 11 so as to surround the through hole 4. Specifically, the virtues 32 include an annular leg portion 33 placed on the top plate 11a, and a plurality of claws for projecting a cooking tool such as a pan from the arbitrary position of the leg portion 33 upward and in the central direction. 34, and the locking portion provided on the leg portion 33 is locked to the locked portion of the burner ring 21 attached to the top plate 11a, for example, to prevent rotation in the circumferential direction. It is placed on the top plate 11a.

  The burner cap 14 is an annular block body having an upper and lower opening 18 that opens up and down at the center, and a plurality of flame holes 17 are arranged in the outer edge end face. Specifically, the burner cap 14 of this example is made of aluminum die-cast, and a connecting cylinder 35 that forms the upper and lower openings 18 is suspended from the center of the burner cap 14, and a flame is radially formed on the lower surface of the burner cap 14. A large number of hole grooves 36 are formed in the circumferential direction, and a plurality of radial secondary air supply grooves 37 are formed in the circumferential direction on the upper surface of the burner cap 14. Here, each of the flame hole groove 36 and the secondary air supply groove 37 opens to the outer edge end face of the burner cap 14, but the opening to the outer edge end face of the flame hole groove 36 constitutes the flame hole 17. The opening to the outer edge end surface of the secondary air supply groove 37 is provided between the adjacent flame holes 17. The burner cap 14 is placed on the burner body 13 by fitting the connecting cylinder 35 of the burner cap 14 inside the inner cylinder portion 20 of the burner body 13, and the lower surface of the burner cap 14 is placed on the placement surface 25 of the burner body 13. This is done by placing it on top. In the state where the burner cap 14 is placed on the burner main body 13, as shown in FIG. 3, although the upper opening of the mixing chamber 16 of the burner main body 13 is closed by the burner cap 14, the flame hole 17 forms the flame hole groove 36. The upper and lower openings 18 extending from the burner cap 14 to the burner body 13 are formed by connecting the connecting cylinder 35 of the burner cap 14 to the inner cylinder portion 20 of the burner body 13. Strictly speaking, the flame hole groove 36 is a concave groove that opens downward, and when the burner cap 14 is placed on the placement surface 25 of the burner body 13, the flame hole groove 36 faces the outer edge of the flame hole groove 36. In the vicinity of the opening, the lower opening of the flame hole groove 36 is substantially closed by the mounting surface 25 of the burner body 13 to form a cross-sectional hole shape, and this cross-sectional hole-shaped portion constitutes the flame hole 17. is there.

  Thus, the gas mixture of gas and primary air is supplied to each flame hole 17 from the mixing chamber 16 of the burner body 13 through the flame hole groove 36, and the gas mixture ejected from each flame hole 17. By igniting an ignition flame generated in an ignition chamber 38, which will be described later, the flame is combusted so that the flame is discharged outward from all the flame holes 17. Here, in the combustion of the air-fuel mixture in the flame hole 17, the amount of primary air that is insufficient is efficiently received by receiving the supply of secondary air. As the secondary air, not only the air around the flame hole 17, but also the air inside the gas cooker 11, which is caused to wrap around the burner cap 14 from the upper and lower openings 18 and reach the vicinity of the flame hole 17, is used. . In particular, since the lower part of the upper and lower openings 18 of the burner body 13 of this example opens not only downward but also to the side, the warm air in the vicinity of the lower surface of the top plate 11a that tends to be trapped in the gas cooker 11 is given priority. It can be used as secondary air, and efficient heat dissipation in the gas cooker 11 is achieved. Further, since the secondary air supply groove 37 is provided on the upper surface of the burner cap 14 of this example, the cover 15 is placed on the upper surface of the burner cap 14 in order to reduce the vertical dimension of the gas stove burner 1. Even when they are close to each other, the secondary air from the upper and lower openings 18 can be reliably supplied to the vicinity of the flame hole 17 through the secondary air supply groove 37.

  When the burner cap 14 is placed on the placement surface 25 of the burner body 13, the burner body 13 is located between the lower end of the outer edge end surface of the burner cap 14 and the outer edge portion of the placement surface 25 of the burner body 13. A small gap extending in the circumferential direction of the burner cap 14 is formed by the recessed step portion 25a provided on the mounting surface 25, that is, the entire flame hole 17 of the burner cap 14 is communicated in the circumferential direction by the minute gap. . This minute gap communicates not only with the flame hole 17 but also with an ignition chamber 38 to be described later. The ignition flame generated in the ignition chamber 38 is spread to the air-fuel mixture of each flame hole 17 (fired). Each flame hole 17 constitutes an auxiliary flame passage 39 for generating a flame. Here, a small chamber-like void 40 is formed between the adjacent flame hole grooves 36 on the lower surface of the burner cap 14, and the void 40 communicates with the auxiliary flame channel 39. Thus, the lift prevention effect and the fire transfer effect of the flame burning in the flame hole 17 are improved. The connecting cylinder 35 of the burner cap 14 is provided with a notch 35a at a part thereof, and a positioning protrusion 20a projecting inwardly from the inner peripheral surface of the inner cylinder portion 20 of the burner body 13 is provided in the notch 35a. By inserting the burner cap 14, the burner cap 14 is placed on the burner body 13 while being positioned in the circumferential direction. Here, the flame hole 17 of the burner cap 14 is provided in a portion excluding a portion corresponding to the claw portion 34 of the virtues 32 on the outer edge end surface of the burner cap 14, and a portion corresponding to the claw portion 34 of the virtues 32. The burner cap 14 is formed with an ignition chamber 38 that generates an ignition flame. By positioning the burner cap 14 on the burner main body 13 after positioning in the circumferential direction, the tip of the spark plug 2a attached to the burner main body 13 is securely positioned at a predetermined position in the ignition chamber 38 of the burner cap 14 as will be described later. The flame hole 17 of the burner cap 14 can be surely disposed in a portion not corresponding to the claw portion 34 of the virtues 32 and is burned in the flame hole 17. The fired flame can be used only for heating cooking utensils such as pots without being obstructed by the claw portions 34 of the virtues 32, and the thermal efficiency of the gas stove burner 1 can be improved. Here, in detail, the ignition chamber 38 has a horizontal piece 38a in which a flange piece 38b is suspended so as to rim the edge portion, and projects radially outward from the outer edge end face of the burner cap 14, and a lower surface of the horizontal piece 38a. And a space surrounded by the upper surface of the flange base portion 26 of the burner main body 13 constitutes this, and the spark plug 2a protruding upward from the flange base portion 26 is formed at a substantially central portion of the horizontal piece 38a. A target electrode 38c for generating a spark is formed by disposing the discharge electrode 41 at the tip so as to face each other. In addition to the spark plug 2a, the accessory part 2 attached to the burner body 13 includes a thermocouple 2b (FIG. 2) that detects a flame in the flame hole 17 and functions as a safety device. By positioning the burner cap 14 on the burner body 13 after positioning in the circumferential direction, the thermocouple 2b can also be reliably arranged at a predetermined position near the flame hole 17.

  By the way, the gas stove burner 1 of this example is characterized by the attachment structure of the accessory parts 2 such as the spark plug 2a and the thermocouple 2b to the burner body 13, and the attachment work of the accessory part 2 to the burner body 13 is performed. The improvement of the property and the improvement of the attachment accuracy of the accessory part 2 to the burner main body 13 are aimed at. Details will be described below.

  As shown in FIG. 5, the spark plug 2 a has a rod-like overall shape formed by wrapping a conductive core material 42 with an insulating material 43. A discharge electrode 41 from which the tip of the core member 42 protrudes is formed at the tip of the spark plug 2a, and a blade-shaped contact protrusion 5 that protrudes radially outward is formed on the side surface of the spark plug 2a. Has been. The abutment protrusions 5 are projected radially outward from the side surface of the spark plug 2a at a position shifted by 180 ° in plan view, that is, a pair of abutment projections 5 is provided on the side surface of the spark plug 2a. Is formed. A tapered surface 10 is formed in a portion of the side surface of the spark plug 2a between the pair of contact projections 5 so that the outer diameter of the spark plug 2a becomes thinner. The base end portion of the tapered surface 10 and the base end portion of the contact protrusion 5 are connected with the same outer diameter. That is, the taper surface 10 and the contact protrusion 5 are provided side by side in the same circumferential direction of the spark plug 2a. Therefore, the taper surface 10 is left on the spark plug 2a while leaving a part of the side surface of the accessory part 2 in the circumferential direction. If the outer diameter of the spark plug 2a is reduced, the remaining portion becomes a portion protruding in the radial direction from the surface of the tapered surface 10, and the contact protrusion 5 having the same diameter as the outer diameter of the spark plug 2a can be formed. That is, the taper surface 10 and the contact protrusion 5 can be simultaneously arranged in the same circumferential direction of the spark plug 2a while suppressing an increase in the outer diameter of the contact protrusion 5 with respect to the spark plug 2a. Thus, the manufacturability of the accessory part 2 is improved. Further, a groove-like engaging recess 8 that is recessed in the radially inward direction is formed on the side surface of the spark plug 2a on the base end side with respect to the contact protrusion 5 over the entire circumference. Specifically, the engagement recess 8 is formed by being cut from the side surface of the spark plug 2a so as to be substantially orthogonal to the axial direction thereof. That is, the engagement recess 8 is formed in the radially inward direction from the side surface of the spark plug 2a. An engagement surface 8a is formed so as to be recessed and face the base end direction of the accessory part 2. Here, for the sake of convenience, a portion of the spark plug 2a closer to the distal end than the tapered surface 10 is referred to as a distal end region 44 of the spark plug 2a, and a portion of the spark plug 2a proximal to the tapered surface 10 is referred to as the proximal end of the spark plug 2a. When referred to as a region 45, the outer diameter of the base end region 45 of the spark plug 2a of this example is formed to be the same as the outer diameter of the abutting projection 5, and the outer diameter of the tip region 44 of the spark plug 2a is Compared to the proximal end region 45, the tapered surface 10 is formed to have a smaller diameter by a smaller diameter.

  The ignition plug 2a is attached to the burner body 13 in the storage space 3 provided in the burner body 13. As shown in FIG. 1, the storage space 3 is formed at the lower surface portion of the flange base portion 26 of the burner body 13 where the ignition chamber 38 of the burner cap 14 mounted on the burner body 13 is located above. The point 3 is communicated with the ignition chamber 38 by a through hole 4 drilled vertically in the flange base 26. Further, on the inner surface of the storage space 3, an engagement protrusion 6 is provided inwardly and a spring material 7 is provided so as to face the engagement protrusion 6. The spark plug 2a is attached to the burner body 13 in the storage space 3 with the tip region 44 of the spark plug 2a being inserted into the through-hole 4 and the spark plug 2a being positioned in the radial direction thereof. The front end surface of the portion 5 is brought into contact with the hole edge (downward opening edge) of the through hole 4 in the inner surface of the storage space 3 so that the spark plug 2a is positioned between the engagement protrusion 6 and the spring material 7 and stored empty. The ignition plug 2a in this state is arranged at an appropriate position 3 and is urged toward the engagement protrusion 6 by the spring material 7, and the engagement recess 8 of the ignition plug 2a and the engagement protrusion 6 of the burner body 13 are ignited. This is done by engaging the plug 2a with positioning in the axial direction. Thus, the spark plug 2a attached to the burner body 13 in the storage space 3 has its tip inserted into the ignition chamber 38 through the through hole 4, and the discharge electrode 41 at the tip of the spark plug 2a is connected to the ignition chamber. It is arranged so as to oppose the target electrode 38c provided on 38.

  Specifically, the storage space 3 of this example is formed in a space surrounded by an upper housing 13a and a lower housing 13b forming the burner body 13, as shown in FIGS. Specifically, the upper housing 13 a integrally forms the upper half portion of the mixing tube 19 and the outer cylinder portion 21 of the mixing chamber 16 including the flange base portion 26 and the outer edge step portion 27, and the lower housing 13 b is formed of the mixing tube 19. The lower half portion and the inner cylinder portion 20 and the lower surface portion 22 of the mixing chamber 16 are integrally formed, but a horizontal plate-like pressing piece 46 is directed to the outer side in the radial direction of the burner body 13 in the lower housing 13b. Projected as a single unit. When the upper housing 13a and the lower housing 13b are integrated, the upper surface of the projecting tip of the presser piece 46 is brought into contact with the lower surface of a hanging base portion 47 (to be described later) of the upper housing 13a. A room-like storage space 3 is formed between the lower housing 13b.

  In addition, the through hole 4 drilled in the flange base portion 26 of the upper housing 13a allows the distal end region 44 of the spark plug 2a to be fitted with almost no gap so that the spark plug 2a can be positioned in the radial direction. . That is, the hole diameter of the through hole 4 is formed to be substantially the same as the outer diameter of the tip region 44 of the spark plug 2a. As shown in FIG. 8, a counterbore hole 48 is formed around the through hole 4 on the lower surface of the flange base portion 26, and the counterbore hole 48 is in contact with the spark plug 2 a disposed in the storage space 3. The protrusion 5 can be stored. That is, the hole diameter of the counterbore hole 48 is formed to be approximately the same as the outer diameter of the base end region 45 of the spark plug 2a.

  Further, a drooping base portion 47 is suspended from a portion of the hole edge of the counterbore 48 radially outside the burner body 13. The bottom surface of the drooping base portion 47 is recessed upward to open downward. The concave groove 49 is formed in a straight line so as to cross the through hole 4 and the counterbore part in a plan view. As described above, when the upper housing 13a and the lower housing 13b are integrated with the lower surface of the drooping base portion 47, the upper surface of the pressing piece 46 of the lower housing 13b comes into contact. Groove insertion protrusions 50 that protrude upward are formed on the upper surface, and when the upper housing 13a and the lower housing 13b are integrated, the groove insertion protrusions 50 are inserted into the concave grooves 49, and the groove insertion protrusions. A pair of insertion holes 9 is formed by a hole-like gap between the groove 50 and the groove 49. The pair of insertion holes 9 are formed in a straight line so as to be located at both ends of the storage space 3 and open to the inner surface of the storage space 3, and the linear spring material as the spring material 7 is formed in the insertion hole 9. 7a is stored. That is, if the linear spring material 7a is disposed in the groove 49 before joining the upper and lower housings 13a and 13b, the linear spring material 7a is sandwiched between the upper and lower housings 13a and 13b when the upper and lower housings 13a and 13b are joined. Thus, it is supported in a state fitted in the insertion hole 9. Thus, the linear spring material 7 a is fitted into both insertion holes 9 at both ends in the longitudinal direction of the linear spring material 7 a, and the central portion in the longitudinal direction of the linear spring material 7 a is between the inner surfaces of the storage space 3. It is attached to the burner main body 13 so as to be bridged over.

  Further, the presser piece 46 is formed with an arcuate cutout 51 that is recessed from the protruding tip end toward the radially inner side of the burner body 13. The notch 51 has an opening cross section that is sufficiently larger than the outer diameter of the spark plug 2 a and communicates with the storage space 3, and an engaging protrusion 6 that protrudes inward is formed at the edge of the notch 51. Yes. Note that an inclined surface 6 a is formed on the lower surface of the engaging protrusion 6 so as to be inclined upward toward the tip. As described above, the linear spring member 7 a is arranged so that the central portion in the longitudinal direction faces the inner surface of the storage space 3, but the central portion in the longitudinal direction of the linear spring material 7 a is in the storage space 3. It is arranged in a positional relationship facing the engagement protrusion 6 through the axis of the through hole 4 or counterbore hole 48 inside. The horizontal disposition distance between the engagement protrusion 6 and the linear spring member 7a is larger than the outer diameter of the distal end region 44 of the spark plug 2a and smaller than the outer diameter of the base end region 45 of the spark plug 2a. Is formed. As shown in FIG. 9, the spark plug 2a is sequentially inserted from the front end into the storage space 3 configured as described above, and the spark plug 2a is attached to the burner body 13 by the insertion operation of the spark plug 2a. ing. When inserting the spark plug 2a into the storage space 3, first, the spark plug 2a is inserted into the notch 51 from the front end side, and the spark plug 2a is inserted between the engagement protrusion 6 and the linear spring material 7a. Push it in from the side and let it pass (FIG. 9A). Here, the insertion posture of the spark plug 2a is related to the protruding direction of the pair of contact protrusions 5 so that the contact protrusions 5 are not caught by the engagement protrusions 6 or the linear spring material 7a during insertion. It is performed in a posture oriented in a direction substantially orthogonal to the direction connecting the joint protrusion 6 and the linear spring material 7a. The insertion posture of the spark plug 2a can be easily adjusted by rotating the accessory part 2 in the circumferential direction. Thus, when the spark plug 2a passes between the engaging protrusion 6 and the linear spring material 7a, the tapered surface 10 of the spark plug 2a is slidably contacted with the engaging protrusion 6 and the linear spring material 7a. The In other words, when the spark plug 2a is inserted between the engagement protrusion 6 and the linear spring material 7a, the linear spring material 7a can be gradually expanded by the tapered surface 10, and the ignition plug 2a is stored. The insertion into the empty space 3 can be performed smoothly (FIG. 9B). When the spark plug 2a is subsequently inserted into the storage space 3, the tip region 44 of the spark plug 2a is inserted into the through hole 4 (FIG. 9C), and the spark plug 2a is further inserted into the storage space 3. As a result, the tip surface of the contact protrusion 5 of the spark plug 2a comes into contact with the lower opening edge of the through hole 4, the insertion of the spark plug 2a is stopped, and the linear spring material 7a does not fit into the engagement recess 8. In this way, the spark plug 2 a is arranged at a predetermined position in the storage space 3. In this example, at this time, the engagement protrusion 6 of the burner body 13 and the engagement recess 8 of the spark plug 2a are strongly engaged by the bias of the linear spring material 7a, and the spark plug 2a is positioned in the axial direction. In this state, the spark plug 2a is attached to the burner body 13 (FIG. 9 (d), FIG. 1). Strictly speaking, since the linear spring material 7a elastically contacts the tapered surface 10, the urging force of the linear spring material 7a is also applied to the spark plug 2a in the proximal direction thereof, however, A surface 6b of the engagement protrusion 6 facing the distal end of the spark plug 2a and an engagement surface 8a of the engagement recess 8 are strongly locked, whereby the engagement protrusion 6 and the engagement recess 8 are engaged. The ignition plug 2a is attached to the burner body 13. In order to remove the spark plug 2 a from the burner body 13, the spark plug 2 a is tilted toward the spring material 7 and elastically deformed so as to separate the spring material 7 from the engagement projection 6, thereby engaging the engagement recess of the engagement projection 6. 8 is released, and the spark plug 2a is pulled out from the storage space 3 to the base end side. Here, a taper 4a that extends upward is formed at the upper part of the hole surface of the through hole 4, and a taper 4b that extends downward is formed at the lower part of the hole surface, so that the spark plug 2a is inserted into or extracted from the through hole 4. The work is facilitated.

  Thus, in this example, since the spark plug 2a could be directly attached to the burner main body 13, compared to the conventional case where the spark plug 2a was attached to the burner main body 13 via the mounting bracket 60, It is possible to suppress the mounting error and to ensure good mounting accuracy of the spark plug 2a to the gas stove burner 1, and to improve the workability of mounting and replacing the spark plug 2a to the gas stove burner 1. It is a thing. Specifically, the mounting error of the ignition plug 2a to the gas stove burner 1 is conventionally constituted by the mounting error between the ignition plug 2a, the mounting bracket 60, and the gas stove burner 1. In this example, since the mounting error between the two of the spark plug 2a and the gas stove burner 1 constitutes this, the mounting error is suppressed. In addition, the attachment work of the spark plug 2a to the gas stove burner 1 has been conventionally performed by the three attachments of the spark plug 2a, the mounting bracket 60, and the gas stove burner 1, but in this example, the ignition plug 2a is ignited. The installation of the plug 2a and the gas stove burner 1 can be done by two persons, and the workability of the mounting and replacement work can be improved.

  Further, when the spark plug 2a is attached to the gas stove burner 1, the spark plug 2a is positioned in the radial direction and the axial direction thereof, so the spark plug 2a is attached to the gas stove burner. 1 can be easily and accurately attached to a predetermined position. Further, the abutting protrusion 5 can be brought into contact with the hole edge of the through hole 4 to avoid the state where the spark plug 2a is inserted too far into the storage space 3, and the tip of the spark plug 2a is made into the through hole 4. The spark plug 2a is inserted into the housing space 3 from its tip so as to be inserted, and the spring plug 7 is biased to the spark plug 2a inserted into the housing space 3 to engage the engaging protrusion 6 and the engaging recess. Since the spark plug 2a can be attached to the gas stove burner 1 by engaging with the gas stove 8, as shown in FIG. It is possible to perform the attachment of the accessory part 2 to the gas stove burner 1 at a stretch by one-touch operation such as insertion into the place 3, and the operation of attaching the spark plug 2a to the gas stove burner 1 is greatly improved. Improvements are being made. Here, the insertion of the spark plug 2a into the storage space 3 starts by inserting the tip of the spark plug 2a into the notch 51, but the lower surface of the engaging projection 6 at the edge of the notch 51 is inclined so as to be inclined upward. Since the surface 6a is formed, even if the tip of the accessory part 2 is applied to the lower surface of the engaging protrusion 6, the tip of the accessory part 2 is guided into the notch 51 by the inclined surface 6a. The insertion operation into the storage space 3 is improved.

  Further, in this example, since a simple linear spring material 7a is used as the spring material 7, the structure for attaching the spark plug 2a to the gas stove burner 1 is simplified, and the spark plug 2a is additionally provided. The productivity of the gas stove burner 1 is improved. Further, the insertion hole 9 into which the end portion of the linear spring material 7a in the longitudinal direction is fitted is formed with the groove 49 of the upper housing 13a when the upper housing 13a and the lower housing 13b are integrated as described above. Since it is formed by the groove insertion protrusion 50 of the lower housing 13b, if the upper housing 13a and the lower housing 13b are integrated after the linear spring material 7a is positioned in the groove 49, the insertion hole can be easily obtained. 9, the end of the linear spring member 7a in the longitudinal direction can be fitted, and the productivity of the gas stove burner 1 provided with the spark plug 2a is improved. Furthermore, even if a simple linear spring material 7a is used as the spring material 7, the elastic reaction force received from the spark plug 2a received at the center in the longitudinal direction of the linear spring material 7a is the longitudinal length of the linear spring material 7a. Since the gas stove burner 1 can be supported at both ends in the direction, that is, the linear spring material 7a can be supported by the gas roller burner 1 by both ends, and the elastic performance of the linear spring material 7a is structurally improved. In other words, suppression of sagging or the like of the linear spring material 7a is achieved.

  In the above description, the ignition plug 2a is taken as an example of the accessory part 2 and the structure for attaching the ignition plug 2a to the burner body 13 has been described. However, the accessory part 2 attached to the gas stove burner 1 has been turned off as a safety device. There is also a thermocouple 2b.

  In this example, in the structure for attaching the thermocouple 2b to the burner body 13, as shown in FIG. 10, the storage space 3 that opens downward is provided on the lower surface of the flange base 26 of the upper housing 13a of the burner body 13. The lower housing 13b joined to the upper housing 13a closes the lower opening of the storage space 3, and the through hole 4 communicating with the storage space 3 is provided through the flange base 26 in the vertical direction. A lower through hole 52 that is coaxial with the through hole 4 is formed in a portion that closes the place 3, and a leaf spring material 7b is attached to the burner body 13 so as to face the inner surface of the storage space 3, and is formed in a rod shape. The tip of the thermocouple 2b is inserted into the storage space 3 and the through hole 4 in order from the lower through hole 52, and the leaf spring material 7b elastically contacted with the side surface of the thermocouple 2b is disposed in the circumferential direction of the side surface of the thermocouple 2b. Is done in that engaged in the groove-like engaging recess 8 provided me. Specifically, the thermocouple 2b is formed with an abutting protrusion 5 that protrudes radially outward from the engagement recess 8 on the side surface thereof. The leaf spring material 7b is supported by the burner body 13 with one end in the longitudinal direction being cantilevered and the other end in the longitudinal direction faces the inner surface of the storage space 3, and the thermocouple 2b in the leaf spring material 7b. It is arranged in a state of being inclined so as to be closer to the thermocouple 2b as the portion in the direction of the tip. The engaging recess 8 is formed with an engaging surface 8a facing the base end direction of the thermocouple 2b, and the end surface of the leaf spring material 7b is elastically contacted from below with the engaging surface 8a. 7b and the engagement recessed part 8 are engaged. Thus, when the thermocouple 2 b is inserted into the storage space 3, the front end surface 5 a of the contact protrusion 5 is brought into contact with the edge of the through hole 4 facing the inner surface of the storage space 3, so Placement of the place 3 at an appropriate position is ensured, and when it is placed in the storage space 3 as described above, it is inserted into the lower through hole 52 and the through hole 4 and positioned in the radial direction, The leaf spring material 7b is engaged with the engagement recess 8 with the axial positioning, so that it is directly attached to a predetermined position of the burner body 13. The thermocouple 2b is removed from the burner body 13 by inserting a screwdriver or the like into the storage space 3 to pull the leaf spring material 7b away from the engagement recess 8 and elastically contact the leaf spring material 7b to the engagement recess 8. This is done by releasing the engagement by pulling out the thermocouple 2b from the storage space 3.

  Thus, the attachment structure of the thermocouple 2b of this example to the burner body 13 is different from the attachment structure of the spark plug 2a to the burner body 13 described above. However, the mounting structure of the thermocouple 2b to the burner body 13 is the same as the mounting structure of the spark plug 2a to the burner body 13, and the mounting error of the thermocouple 2b to the burner body 13 is reduced. It is also preferable to improve the mounting workability. For example, as shown in FIG. 11, the leaf spring material 7b is arranged in the storage space 3 in a state parallel to the side surface of the thermocouple 2b, and faces the leaf spring material 7b in the lower through hole 52 of the lower housing 13b. An engaging protrusion 6 that protrudes inwardly is formed at the edge of the part, and the lower through hole 52 is formed in a long hole shape in a direction opposite to the leaf spring material 7b and the engaging protrusion 6, The spring spring material 7b is elastically contacted to the side surface of the thermocouple 2b arranged in FIG. 3 to urge the thermocouple 2b toward the engaging projection 6 and is engaged to be recessed on the side surface of the thermocouple 2b. The engagement protrusion 6 is engaged with the recess 8. In this case, when the thermocouple 2b is inserted into or removed from the storage space 3, the upper and lower end surfaces 53 of the leaf spring material 7b are prevented from being caught by the recessed portion 54 provided in the side surface of the thermocouple 2b. Is R-processed.

  In the above-described structure for attaching the spark plug 2a to the burner body 13, a simple linear spring material 7a is used as the spring material 7. The spring material 7 is a plate spring material as shown in FIG. It is also preferable to use 7b. In addition, as the engaging recess 8 provided in the accessory part 2 such as the spark plug 2a or the thermocouple 2b, in the above example, a groove shape recessed inwardly from the side surface of the accessory part 2 is exemplified. A stepped shape that is recessed radially inward from the side surface of 2 is also preferable, that is, if the engaging recess 8 is provided with the engaging surface 8a, the above-described effects can be obtained regardless of the overall shape. It can be done.

  Further, the positioning of the spark plug 2a to the burner body 13 in the structure for mounting the spark plug 2a to the burner body 13 described above is performed at the hole edge of the through hole 4 and the engagement protrusion 6 on the inner surface of the storage space 3. The surface 6b facing the front end of the accessory part 2 is recessed on the front end surface 5a of the abutment protrusion 5 of the accessory part 2 and the side surface of the accessory part 2 urged by the spring material 7 of the gas stove burner 1. The engagement surface 8a is sandwiched between the engagement protrusion 6 and the engagement recess 8 when the attachment protrusion 2 is not provided on the accessory part 2. Needless to say, this can be done by engaging with.

It is side sectional drawing of the principal part of the burner for gas stoves of the example of embodiment of this invention. It is a top view of a gas cooker same as the above. It is a sectional side view of the principal part of a gas cooker same as the above. It is a disassembled perspective view of the gas stove burner same as the above. It is a spark plug as an accessory part of the gas stove burner same as the above, (a) is a side view, (b) is a top view, (c) is a side sectional view. It is a burner main body same as the above, (a) is a sectional side view, (b) is a sectional side view of the main part. It is a bottom view of a burner main body same as the above. It is a disassembled perspective view of the principal part of a burner main body same as the above. (A)-(d) is explanatory drawing explaining the attachment to the burner main body of the attachment part same as the above in order. It is a sectional side view of the attachment part of the thermocouple as an attached part in the gas stove burner same as the above. It is side sectional drawing of the other example of the attachment structure to the burner for gas stoves of a thermocouple. (A) is a top view of the burner for gas stoves of the example of background art, (b) is a sectional side view. It is a perspective view of the attachment state to the attachment bracket of the attachment parts same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas stove burner 2 Attached parts 2a Spark plug 3 Storage space 4 Through-hole 5 Abutting protrusion 6 Engaging protrusion 7 Spring material 7a Linear spring material 8 Engaging groove 9 Insertion hole 10 Tapered surface 13 Burner body 14 Burner cap 15 Cover 38 Ignition chamber 26 Flange base 38c Target electrode 41 Discharge electrode

Claims (6)

  A rod-shaped accessory part such as a spark plug or a thermocouple is placed in the storage space provided in the gas stove burner, and the tip of the accessory part is inserted into the through-hole connected to the storage space. Engagement protrusions project inwardly from the inner surface of the storage space of the burner for the burner, and a spring material is attached to the gas stove burner so as to face the inner surface of the storage space at the portion opposite the engagement protrusion, Engagement recesses that are recessed inward in the radial direction are formed on the side surfaces of the accessory parts, and the accessory parts arranged in the storage space are urged toward the engagement protrusions by a spring material to engage the engagement protrusions with the engagement recesses. Attachment structure of attached parts to gas stove burner characterized by being combined.   A rod-shaped accessory part such as a spark plug or a thermocouple is placed in the storage space provided in the gas stove burner, and the tip of the accessory part is inserted into the through-hole connected to the storage space. Engagement protrusions project inwardly from the inner surface of the storage space of the burner for the burner, and a spring material is attached to the gas stove burner so as to face the inner surface of the storage space at the portion opposite the engagement protrusion, An engagement surface that is recessed radially inward from the side surface of the accessory part to face the proximal direction of the accessory part is formed, and the abutting protrusion is more radially outward than the engagement surface on the side surface of the accessory part. The tip of the abutting protrusion and the edge of the through hole in the inner surface of the storage space are arranged opposite to each other, and the accessory parts disposed in the storage space are biased toward the engaging protrusion by a spring material. The surface of the engagement protrusion that faces the tip of the accessory part and the engagement surface are arranged opposite to each other Mounting structure annexed parts to the gas stove burner, characterized.   The spring material is composed of a straight spring material, and insertion holes that open to the inner surface of the storage space are formed in both ends of the storage space in a straight line, and both longitudinal ends of the linear spring material are formed in both the insertion holes. And a central part in the longitudinal direction of the linear spring member is bridged between the inner surfaces of the storage space, wherein the accessory part to the gas stove burner according to claim 1 or 2 is provided. Mounting structure.   The accessory part to the gas stove burner according to any one of claims 1 to 3, wherein a tapered surface is provided on the side surface of the spark plug as an accessory part so that the outer diameter of the spark plug becomes thinner. Mounting structure.   5. The attachment structure for an accessory part to a gas stove burner according to claim 4, wherein a tapered surface and a contact protrusion are provided side by side in the same circumferential direction of the spark plug.   The burner body that constitutes the gas stove burner together with the burner cap is formed by joining and integrating the upper and lower housings, the storage space and the through-hole are formed in the upper housing, and the engaging protrusion is formed in the lower housing. The spring material is attached to the burner body by sandwiching the spring material between the joint surfaces of the upper and lower housings and arranging the projecting projections in the storage space when they are joined. A structure for attaching an accessory part to the gas stove burner according to claim 5.

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