JP2021134766A - Boss for sensor, and attachment structure of boss for sensor - Google Patents

Boss for sensor, and attachment structure of boss for sensor Download PDF

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JP2021134766A
JP2021134766A JP2020033477A JP2020033477A JP2021134766A JP 2021134766 A JP2021134766 A JP 2021134766A JP 2020033477 A JP2020033477 A JP 2020033477A JP 2020033477 A JP2020033477 A JP 2020033477A JP 2021134766 A JP2021134766 A JP 2021134766A
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sensor
main body
boss
sensor boss
pipe
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JP7148560B2 (en
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大樹 蟹江
Hiroki Kanie
大樹 蟹江
啓仁 鈴木
Hirohito Suzuki
啓仁 鈴木
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Futaba Industrial Co Ltd
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Futaba Industrial Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/0015—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for using exhaust gas sensors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Silencers (AREA)

Abstract

To provide a boss for a sensor capable of improving quality of welding while avoiding interference with other components of a welding torch.SOLUTION: One aspect of the present disclosure is a boss for a sensor that attaches a sensor to an exhaust gas flow path of an internal combustion engine. The boss for a sensor comprises a cylindrical body part configured to fix a sensor, and a flange part connected to one end of the body part. The flange part has a central part located inside the outer peripheral surface of the body part when viewed from a direction parallel to the central axis of the body part, and a protrusion part protruding outward in the radial direction of the body part from the central part. The radius of curvature at the tip of the protrusion part in a view from the direction parallel to the central axis of the body part is smaller than the radius of the body part.SELECTED DRAWING: Figure 1

Description

本開示は、センサ用ボス、及びセンサ用ボスの取付構造に関する。 The present disclosure relates to a sensor boss and a mounting structure of the sensor boss.

内燃機関の排気ガス流路には、温度、圧力、酸素濃度等を測定するためのセンサが配置される。これらのセンサは、配管に溶接されたセンサ用ボスに固定されることで、配管に取り付けられる。 Sensors for measuring temperature, pressure, oxygen concentration, etc. are arranged in the exhaust gas flow path of the internal combustion engine. These sensors are attached to the pipe by being fixed to the sensor boss welded to the pipe.

センサ用ボスは、周縁全体が配管に溶接される必要がある。しかし、センサ用ボスの溶接位置と近接してフランジ等の他の部品が配置されていると、センサ用ボスの溶接に用いられる溶接トーチが他の部品と干渉する。 The entire peripheral edge of the sensor boss needs to be welded to the pipe. However, if another component such as a flange is arranged close to the welding position of the sensor boss, the welding torch used for welding the sensor boss interferes with the other component.

そこで、配管の径方向（つまり配管の外周面の法線と平行な方向）からの溶接が可能な形状のセンサ用ボスが考案されている（特許文献１参照）。 Therefore, a sensor boss having a shape capable of welding from the radial direction of the pipe (that is, the direction parallel to the normal of the outer peripheral surface of the pipe) has been devised (see Patent Document 1).

特開２００９−２２８６４５号公報JP-A-2009-228645

上記公報では、配管の径方向から溶接トーチを挿入することで、溶接トーチと他の部品との干渉が避けられるとされている。しかし、配管の径方向に溶接トーチをセンサ用ボスに当てると、配管側の溶け込みが不十分となりセンサ用ボスの溶接の品質が担保できないおそれがある。 In the above publication, it is stated that interference between the welding torch and other parts can be avoided by inserting the welding torch from the radial direction of the pipe. However, if the welding torch is applied to the sensor boss in the radial direction of the pipe, the penetration on the pipe side becomes insufficient and the welding quality of the sensor boss may not be guaranteed.

本開示の一局面は、溶接トーチの他の部品との干渉を避けつつ、溶接の品質を向上できるセンサ用ボスを提供することを目的としている。 One aspect of the present disclosure is to provide a sensor boss capable of improving welding quality while avoiding interference with other parts of the welding torch.

本開示の一態様は、内燃機関の排気ガス流路にセンサを取り付けるためのセンサ用ボスである。センサ用ボスは、センサを固定するように構成された円筒状の本体部と、本体部の一方の端部に連結された鍔部と、を備える。鍔部は、本体部の中心軸と平行な方向から視て本体部の外周面よりも内側に位置する中央部と、中央部から本体部の径方向外側に突出する突出部と、を有する。本体部の中心軸と平行な方向から視た突出部の先端における曲率半径は、本体部の半径よりも小さい。 One aspect of the present disclosure is a sensor boss for attaching a sensor to the exhaust gas flow path of an internal combustion engine. The sensor boss includes a cylindrical main body portion configured to fix the sensor, and a flange portion connected to one end of the main body portion. The collar portion has a central portion located inside the outer peripheral surface of the main body portion when viewed from a direction parallel to the central axis of the main body portion, and a protruding portion protruding outward in the radial direction from the central portion. The radius of curvature at the tip of the protrusion viewed from a direction parallel to the central axis of the main body is smaller than the radius of the main body.

このような構成によれば、鍔部の突出部が先端の尖った形状であるため、配管の外周面の法線に対し傾斜した姿勢の溶接トーチで突出部の側面を溶接することで、突出部の先端を溶接することができる。 According to such a configuration, since the protruding portion of the flange portion has a pointed shape, the side surface of the protruding portion is projected by welding the side surface of the protruding portion with a welding torch in an inclined posture with respect to the normal of the outer peripheral surface of the pipe. The tip of the part can be welded.

つまり、突出部の先端に突き合わせるように溶接トーチを動かさなくとも、鍔部の全周を溶け込み量の大きい傾斜姿勢の溶接トーチで溶接することができる。そのため、センサ用ボスと近接して配置される他の部品に突出部が近づくようにセンサ用ボスを配置することで、溶接トーチと他の部品との干渉を避けつつ、溶接の品質を向上できる。 That is, even if the welding torch is not moved so as to abut against the tip of the protruding portion, the entire circumference of the flange portion can be welded with the welding torch in an inclined posture having a large amount of penetration. Therefore, by arranging the sensor boss so that the protruding portion approaches other parts arranged close to the sensor boss, it is possible to improve the welding quality while avoiding interference between the welding torch and other parts. ..

本開示の別の様は、内燃機関の排気ガスが流れるように構成された配管と、配管の外周面に配置された第１センサ用ボスとしての上記センサ用ボスと、配管の外周面又は端部に配置された配管部品と、を備えるセンサ用ボスの取付構造である。鍔部は、突出部が中央部と配管部品との間に配置される向きで配管の外周面に溶接される。 Another aspect of the present disclosure is a pipe configured to allow exhaust gas of an internal combustion engine to flow, the above-mentioned sensor boss as a first sensor boss arranged on the outer peripheral surface of the pipe, and the outer peripheral surface or end of the pipe. It is a mounting structure of a sensor boss including piping parts arranged in a portion. The flange portion is welded to the outer peripheral surface of the pipe in a direction in which the protruding portion is arranged between the central portion and the piping component.

このような構成によれば、センサ用ボスの溶接品質を確保しつつ、第１センサ用ボスと配管部品とが近接して配置された排気ガス流路を得ることができる。 According to such a configuration, it is possible to obtain an exhaust gas flow path in which the first sensor boss and the piping component are arranged close to each other while ensuring the welding quality of the sensor boss.

本開示の一態様は、配管部品として、配管にセンサとは別のセンサを取り付けるための第２センサ用ボスを備えてもよい。このような構成によれば、複数のセンサを排気ガス流路に近接して配置することができる。 One aspect of the present disclosure may include, as a piping component, a boss for a second sensor for attaching a sensor other than the sensor to the piping. According to such a configuration, a plurality of sensors can be arranged close to the exhaust gas flow path.

本開示の一態様では、第２センサ用ボスは、別のセンサを固定するように構成された筒状の本体部を備えてもよい。第２センサ用ボスの本体部の中心軸は、第１センサ用ボスの本体部の中心軸と平行であってもよい。第１センサ用ボスの本体部の軸方向から視て、第１センサ用ボスの突出部の先端以外における外周縁の接線は、第１センサ用ボスの本体部の中心軸と第２センサ用ボスの本体部の中心軸とを結ぶ仮想直線と平行であるか、又は交差してもよい。このような構成によれば、溶接トーチと第２センサ用ボスとの干渉を避けつつ、第１センサ用ボスの溶接の品質を向上できる。 In one aspect of the present disclosure, the second sensor boss may include a tubular body that is configured to secure another sensor. The central axis of the main body of the second sensor boss may be parallel to the central axis of the main body of the first sensor boss. When viewed from the axial direction of the main body of the first sensor boss, the tangents of the outer peripheral edge other than the tip of the protruding portion of the first sensor boss are the central axis of the main body of the first sensor boss and the second sensor boss. It may be parallel to or intersect with a virtual straight line connecting the central axis of the main body of the device. According to such a configuration, it is possible to improve the welding quality of the boss for the first sensor while avoiding interference between the welding torch and the boss for the second sensor.

図１Ａは、実施形態におけるセンサ用ボスの取付構造の模式的な斜視図であり、図１Ｂは、図１Ａのセンサ用ボスの取付構造の模式的な平面図であり、図１Ｃは、図１Ａのセンサ用ボスの取付構造の模式的な側面図である。1A is a schematic perspective view of the mounting structure of the sensor boss in the embodiment, FIG. 1B is a schematic plan view of the mounting structure of the sensor boss of FIG. 1A, and FIG. 1C is FIG. 1A. It is a schematic side view of the mounting structure of the sensor boss of. 図２Ａは、実施形態におけるセンサ用ボスの模式的な斜視図であり、図２Ｂは、図２Ａのセンサ用ボスの模式的な平面図であり、図２Ｃは、図２Ａのセンサ用ボスの模式的な側面図であり、図２Ｄは、図２Ａのセンサ用ボスの模式的な正面図であり、図２Ｅは、図２Ａのセンサ用ボスにおける突出部の先端の部分拡大図である。2A is a schematic perspective view of the sensor boss in the embodiment, FIG. 2B is a schematic plan view of the sensor boss of FIG. 2A, and FIG. 2C is a schematic view of the sensor boss of FIG. 2A. 2D is a schematic front view of the sensor boss of FIG. 2A, and FIG. 2E is a partially enlarged view of the tip of the protruding portion of the sensor boss of FIG. 2A. 図３Ａは、図２ＤのＩＩＩＡ−ＩＩＩＡ線での模式的な断面図であり、図３Ｂは、センサをセンサ用ボスに取り付けた状態を示す模式的な断面図である。FIG. 3A is a schematic cross-sectional view taken along the line IIIA-IIIA of FIG. 2D, and FIG. 3B is a schematic cross-sectional view showing a state in which the sensor is attached to the sensor boss. 図４Ａは、図１Ａとは異なる実施形態におけるセンサ用ボスの取付構造の模式的な斜視図であり、図４Ｂは、図４Ａのセンサ用ボスの取付構造の模式的な平面図であり、図４Ｃは、図４Ａのセンサ用ボスの取付構造の模式的な側面図である。4A is a schematic perspective view of the mounting structure of the sensor boss in an embodiment different from FIG. 1A, and FIG. 4B is a schematic plan view of the mounting structure of the sensor boss of FIG. 4A. 4C is a schematic side view of the mounting structure of the sensor boss of FIG. 4A. 図５Ａ、図５Ｂ、図５Ｃ及び図５Ｄは、それぞれ、図２Ａとは異なる実施形態におけるセンサ用ボスの模式的な平面図である。5A, 5B, 5C and 5D are schematic plan views of the sensor boss in a different embodiment from FIG. 2A, respectively.

以下、本開示が適用された実施形態について、図面を用いて説明する。
［１．第１実施形態］
［１−１．構成］
図１Ａ，１Ｂ，１Ｃに示すセンサ用ボスの取付構造１００は、第１センサ用ボス１と、配管２と、第１配管部品３と、第２配管部品４とを備える。 Hereinafter, embodiments to which the present disclosure has been applied will be described with reference to the drawings.
[1. First Embodiment]
[1-1. composition]
The sensor boss mounting structure 100 shown in FIGS. 1A, 1B, and 1C includes a first sensor boss 1, a pipe 2, a first pipe component 3, and a second pipe component 4.

＜配管＞
配管２は、内燃機関の排気ガスが内部を流れるように構成されている。配管２が接続される内燃機関は、特に限定されないが、例としてディーゼル機関が挙げられる。ディーゼル機関としては、自動車、鉄道、船舶、建機等の輸送機器、発電施設などで駆動用又は発電用として用いられるものが挙げられる。 <Piping>
The pipe 2 is configured so that the exhaust gas of the internal combustion engine flows inside. The internal combustion engine to which the pipe 2 is connected is not particularly limited, and examples thereof include a diesel engine. Examples of the diesel engine include those used for driving or power generation in transportation equipment such as automobiles, railways, ships, construction machinery, power generation facilities, and the like.

＜配管部品＞
第１配管部品３は、配管２の外周面に配置されている。本実施形態の第１配管部品３は、他の部材を配管２に固定するためのブラケットである。第１配管部品３は、配管２の外周面に例えば溶接によって接合されている。 <Piping parts>
The first piping component 3 is arranged on the outer peripheral surface of the piping 2. The first piping component 3 of the present embodiment is a bracket for fixing another member to the piping 2. The first piping component 3 is joined to the outer peripheral surface of the piping 2 by, for example, welding.

第２配管部品４は、配管２の端部に配置されている。本実施形態の第２配管部品４は、配管２を他の配管等に接続するためのフランジである。第２配管部品４は、配管２の端部に例えば溶接によって接合されている。第２配管部品４は、配管２よりも配管２の径方向外側に突出している。第２配管部品４は、第１配管部品３と共に、後述する第１センサ用ボス１を配管２の軸方向に挟むように配置されている。 The second piping component 4 is arranged at the end of the piping 2. The second piping component 4 of the present embodiment is a flange for connecting the piping 2 to another piping or the like. The second piping component 4 is joined to the end of the piping 2 by, for example, welding. The second piping component 4 projects more radially outward of the piping 2 than the piping 2. The second piping component 4 is arranged together with the first piping component 3 so as to sandwich the first sensor boss 1, which will be described later, in the axial direction of the piping 2.

＜センサ用ボス＞
第１センサ用ボス１は、配管２によって構成される内燃機関の排気ガス流路にセンサを取り付けるための部材である。 <Sensor boss>
The first sensor boss 1 is a member for attaching the sensor to the exhaust gas flow path of the internal combustion engine composed of the pipe 2.

第１センサ用ボス１に取り付けられるセンサは、排気ガスの温度、圧力、成分（例えば酸素、ＮＯｘ、ＰＭ）等を測定する。
第１センサ用ボス１は、図２Ａ，２Ｂ，２Ｃ，２Ｄ及び図３Ａに示すように、本体部１１と、鍔部１２とを備える。 The sensor attached to the boss 1 for the first sensor measures the temperature, pressure, components (for example, oxygen, NOx, PM) of the exhaust gas and the like.
The boss 1 for the first sensor includes a main body portion 11 and a collar portion 12 as shown in FIGS. 2A, 2B, 2C, 2D and 3A.

本体部１１は、内部が中空となった円筒状の部位である。本体部１１には、図３Ｂに示すようにセンサＳの本体Ｓ１が挿入されることで固定される。本体部１１は、第１センサ用ボス１が配管２に固定された状態で、配管２の径方向外側に突出する。また、本体部１１の中心軸Ｐ１は、配管２の径方向と平行である。 The main body portion 11 is a cylindrical portion having a hollow inside. As shown in FIG. 3B, the main body S1 of the sensor S is inserted into the main body 11 to be fixed. The main body 11 projects outward in the radial direction of the pipe 2 with the boss 1 for the first sensor fixed to the pipe 2. Further, the central axis P1 of the main body 11 is parallel to the radial direction of the pipe 2.

鍔部１２は、本体部１１の一方の端部（つまり配管２に近い側の端部）に連結されている。鍔部１２は、配管２の外周面に溶接によって接合されている。鍔部１２は、本体部１１と一体に形成されている。 The flange portion 12 is connected to one end of the main body 11 (that is, the end closer to the pipe 2). The flange portion 12 is joined to the outer peripheral surface of the pipe 2 by welding. The collar portion 12 is integrally formed with the main body portion 11.

鍔部１２は、中央にセンサＳの棒状の先端部Ｓ２が挿通される開口が形成された板状の部位である。図２Ｃ，２Ｄに示すように、鍔部１２は、配管２の外周面に沿って湾曲している。 The collar portion 12 is a plate-shaped portion having an opening in the center through which the rod-shaped tip portion S2 of the sensor S is inserted. As shown in FIGS. 2C and 2D, the flange portion 12 is curved along the outer peripheral surface of the pipe 2.

鍔部１２は、中央部１２Ａと、第１突出部１２Ｂと、第２突出部１２Ｃと、第１連結部１２Ｄと、第２連結部１２Ｅとを有する。 The collar portion 12 has a central portion 12A, a first protruding portion 12B, a second protruding portion 12C, a first connecting portion 12D, and a second connecting portion 12E.

中央部１２Ａは、本体部１１の中心軸Ｐ１と平行な方向から視て（つまり配管２の径方向から視て）本体部１１の外周面よりも内側に位置する部位である。中央部１２Ａは、平面視で円環状の形状を有する。 The central portion 12A is a portion located inside the outer peripheral surface of the main body portion 11 when viewed from a direction parallel to the central axis P1 of the main body portion 11 (that is, when viewed from the radial direction of the pipe 2). The central portion 12A has an annular shape in a plan view.

図３Ａに示すように、中央部１２Ａは、本体部１１と中心軸Ｐ１と平行な方向に重なる第１領域１２１と、本体部１１の内周面よりも内側に位置する第２領域１２２とを有する。第２領域１２２では、本体部１１の径方向内側に向かって中央部１２Ａの厚みが小さくなるように、本体部１１に近い側の面（つまり上面）がテーパ状に傾斜している。 As shown in FIG. 3A, the central portion 12A includes a first region 121 that overlaps the main body portion 11 in a direction parallel to the central axis P1 and a second region 122 that is located inside the inner peripheral surface of the main body portion 11. Have. In the second region 122, the surface (that is, the upper surface) on the side close to the main body 11 is tapered in a tapered shape so that the thickness of the central portion 12A decreases toward the inner side in the radial direction of the main body 11.

第１突出部１２Ｂは、中央部１２Ａから本体部１１の径方向外側に突出した部位である。本実施形態では、第１突出部１２Ｂの突出方向は、第１センサ用ボス１から第１配管部品３に向かう方向である（図１Ｂ参照）。第１突出部１２Ｂは、第１センサ用ボス１において第１配管部品３に最も近接する部位である。第１突出部１２Ｂは、中央部１２Ａと第１配管部品３との間に配置されている。 The first protruding portion 12B is a portion protruding outward in the radial direction of the main body portion 11 from the central portion 12A. In the present embodiment, the protruding direction of the first protruding portion 12B is the direction from the boss 1 for the first sensor to the first piping component 3 (see FIG. 1B). The first protruding portion 12B is a portion of the first sensor boss 1 that is closest to the first piping component 3. The first protruding portion 12B is arranged between the central portion 12A and the first piping component 3.

本体部１１の中心軸Ｐ１と平行な方向から視た第１突出部１２Ｂの先端１２３における曲率半径Ｒ２（図２Ｅ参照）は、本体部１１の半径Ｒ１（図２Ｃ参照）よりも小さい。ここで、本体部１１の半径Ｒ１は、本体部１１の外径の１／２を意味する。 The radius of curvature R2 (see FIG. 2E) at the tip 123 of the first protrusion 12B viewed from a direction parallel to the central axis P1 of the main body 11 is smaller than the radius R1 (see FIG. 2C) of the main body 11. Here, the radius R1 of the main body portion 11 means 1/2 of the outer diameter of the main body portion 11.

なお、第１突出部１２Ｂの先端１２３は湾曲していなくてもよい。つまり、第１突出部１２Ｂの先端１２３は直線又は曲線が不連続に接続された点であってもよい。第１突出部１２Ｂの先端１２３が不連続点である場合は、第１突出部１２Ｂの先端１２３における曲率半径は、ゼロとする。 The tip 123 of the first protrusion 12B does not have to be curved. That is, the tip 123 of the first protrusion 12B may be a point where straight lines or curves are connected discontinuously. When the tip 123 of the first protrusion 12B is a discontinuity, the radius of curvature of the tip 123 of the first protrusion 12B is zero.

先端１２３の湾曲による丸みは、鋳造又は鍛造における製造の制限、及び先端１２３の欠けを抑制する品質管理によって設けられる。先端１２３は、湾曲せずに角を形成してもよい。 The roundness due to the curvature of the tip 123 is provided by manufacturing restrictions in casting or forging, and quality control that suppresses chipping of the tip 123. The tip 123 may form a corner without being curved.

第２突出部１２Ｃは、中央部１２Ａから本体部１１の径方向外側に突出した部位である。本実施形態では、第２突出部１２Ｃの突出方向は、第１センサ用ボス１から第２配管部品４に向かう方向であり、第１突出部１２Ｂの突出方向とは反対の方向である（図１Ｂ参照）。第２突出部１２Ｃは、第１センサ用ボス１において第２配管部品４に最も近接する部位である。第２突出部１２Ｃは、中央部１２Ａと第２配管部品４との間に配置されている。 The second protruding portion 12C is a portion protruding outward in the radial direction of the main body portion 11 from the central portion 12A. In the present embodiment, the protruding direction of the second protruding portion 12C is the direction from the boss 1 for the first sensor to the second piping component 4, and is the direction opposite to the protruding direction of the first protruding portion 12B (FIG. See 1B). The second protruding portion 12C is a portion of the first sensor boss 1 that is closest to the second piping component 4. The second protruding portion 12C is arranged between the central portion 12A and the second piping component 4.

第２突出部１２Ｃは、第１突出部１２Ｂを反転させた（つまり、第１突出部１２Ｂを本体部１１の中心軸Ｐ１周りに１８０°回転させた）形状である。そのため、本体部１１の軸方向から視た第２突出部１２Ｃの先端における曲率半径は、本体部１１の半径Ｒ１よりも小さい。 The second protruding portion 12C has a shape in which the first protruding portion 12B is inverted (that is, the first protruding portion 12B is rotated by 180 ° around the central axis P1 of the main body portion 11). Therefore, the radius of curvature at the tip of the second protruding portion 12C viewed from the axial direction of the main body portion 11 is smaller than the radius R1 of the main body portion 11.

第１連結部１２Ｄ及び第２連結部１２Ｅは、それぞれ、中央部１２Ａの径方向外側において、第１突出部１２Ｂと第２突出部１２Ｃとを連結している。第１連結部１２Ｄと第２連結部１２Ｅとは、中央部１２Ａを本体部１１の径方向に挟むように配置されている。 The first connecting portion 12D and the second connecting portion 12E connect the first protruding portion 12B and the second protruding portion 12C on the radial outer side of the central portion 12A, respectively. The first connecting portion 12D and the second connecting portion 12E are arranged so as to sandwich the central portion 12A in the radial direction of the main body portion 11.

第１連結部１２Ｄの外縁及び第２連結部１２Ｅの外縁は、それぞれ、本体部１１の外周面と平行である。また、第１連結部１２Ｄの曲率半径及び第２連結部１２Ｅの曲率半径は、それぞれ、本体部１１の半径よりも大きい。 The outer edge of the first connecting portion 12D and the outer edge of the second connecting portion 12E are parallel to the outer peripheral surface of the main body portion 11, respectively. Further, the radius of curvature of the first connecting portion 12D and the radius of curvature of the second connecting portion 12E are each larger than the radius of the main body portion 11.

［１−２．作用］
第１センサ用ボス１を配管２に溶接する際に、図１Ｂ中の矢印Ｄ１及び矢印Ｄ２の向きに溶接トーチを第１突出部１２Ｂの側面に当てながら移動させることで、曲率半径が小さくされている第１突出部１２Ｂの先端１２３の溶接がなされる。 [1-2. Action]
When the first sensor boss 1 is welded to the pipe 2, the radius of curvature is reduced by moving the welding torch in the direction of the arrows D1 and D2 in FIG. 1B while touching the side surface of the first protruding portion 12B. The tip 123 of the first protruding portion 12B is welded.

そのため、第１突出部１２Ｂと第１配管部品３との間において、図２Ｄに示される本体部１１の中心軸Ｐ１（つまり配管２の径方向）に対し傾斜した向きで溶接トーチＴを第１突出部１２Ｂの先端１２３に突き合わせる必要がない。 Therefore, the welding torch T is first placed between the first protruding portion 12B and the first piping component 3 in a direction inclined with respect to the central axis P1 (that is, the radial direction of the piping 2) of the main body portion 11 shown in FIG. 2D. It is not necessary to abut the tip 123 of the protrusion 12B.

第２突出部１２Ｃにおいても同様に、第２突出部１２Ｃと第２配管部品４との間において、本体部１１の中心軸Ｐ１に対し傾斜した向きで溶接トーチを第２突出部１２Ｃの先端に突き合わせることなく、第２突出部１２Ｃの先端を溶接することができる。 Similarly, in the second protruding portion 12C, a welding torch is placed at the tip of the second protruding portion 12C between the second protruding portion 12C and the second piping component 4 in a direction inclined with respect to the central axis P1 of the main body portion 11. The tip of the second protrusion 12C can be welded without abutting.

［１−３．効果］
以上詳述した実施形態によれば、以下の効果が得られる。
（１ａ）鍔部１２の第１突出部１２Ｂ及び第２突出部１２Ｃがそれぞれ先端の尖った形状であるため、配管２の外周面の法線（つまり配管２の径方向）に対し傾斜した姿勢の溶接トーチで第１突出部１２Ｂの側面及び第２突出部１２Ｃの側面を溶接することで、第１突出部１２Ｂの先端及び第２突出部１２Ｃの先端を溶接することができる。 [1-3. effect]
According to the embodiment described in detail above, the following effects can be obtained.
(1a) Since the first protruding portion 12B and the second protruding portion 12C of the flange portion 12 each have a pointed shape, the posture is inclined with respect to the normal line of the outer peripheral surface of the pipe 2 (that is, the radial direction of the pipe 2). By welding the side surface of the first protrusion 12B and the side surface of the second protrusion 12C with the welding torch of the above, the tip of the first protrusion 12B and the tip of the second protrusion 12C can be welded.

つまり、第１突出部１２Ｂの先端及び第２突出部１２Ｃの先端に突き合わせるように溶接トーチを動かさなくとも、鍔部１２の全周を溶け込み量の大きい傾斜姿勢の溶接トーチで溶接することができる。そのため、第１センサ用ボス１と近接して配置される他の部品（つまり第１配管部品３及び第２配管部品４）に第１突出部１２Ｂ及び第２突出部１２Ｃが近づくように第１センサ用ボス１を配置することで、溶接トーチと他の部品との干渉を避けつつ、溶接の品質を向上できる。 That is, even if the welding torch is not moved so as to abut against the tip of the first protruding portion 12B and the tip of the second protruding portion 12C, the entire circumference of the flange portion 12 can be welded with the welding torch in an inclined posture having a large amount of penetration. can. Therefore, the first projecting portion 12B and the second projecting portion 12C are brought closer to the other components (that is, the first piping component 3 and the second piping component 4) arranged close to the first sensor boss 1. By arranging the sensor boss 1, the quality of welding can be improved while avoiding interference between the welding torch and other parts.

（１ｂ）第１センサ用ボス１の溶接品質を確保しつつ、第１センサ用ボス１と第１配管部品３とが近接して配置されると共に、第１センサ用ボス１と第２配管部品４とが近接して配置された排気ガス流路を得ることができる。 (1b) While ensuring the welding quality of the first sensor boss 1, the first sensor boss 1 and the first piping component 3 are arranged close to each other, and the first sensor boss 1 and the second piping component are arranged close to each other. It is possible to obtain an exhaust gas flow path in which 4 and 4 are arranged in close proximity to each other.

（１ｃ）第１突出部１２Ｂ及び第２突出部１２Ｃの先端から本体部１１に向けて鍔部１２の周縁が直線状となる。そのため、従来技術のような円形の鍔部に比べて、鍔部１２の溶接が容易である。 (1c) The peripheral edge of the flange portion 12 becomes linear from the tips of the first protruding portion 12B and the second protruding portion 12C toward the main body portion 11. Therefore, welding of the collar portion 12 is easier than that of the circular collar portion as in the prior art.

［２．第２実施形態］
［２−１．構成］
図４Ａ，４Ｂ，４Ｃに示すセンサ用ボスの取付構造２００は、第１センサ用ボス１と、配管２と、第２配管部品４と、第２センサ用ボス５とを備える。 [2. Second Embodiment]
[2-1. composition]
The sensor boss mounting structure 200 shown in FIGS. 4A, 4B, and 4C includes a first sensor boss 1, a pipe 2, a second piping component 4, and a second sensor boss 5.

第１センサ用ボス１、配管２及び第２配管部品４は、それぞれ、図１Ａのセンサ用ボスの取付構造１００における第１センサ用ボス１、配管２及び第２配管部品４と同じものであるため、説明を省略する。 The first sensor boss 1, the pipe 2, and the second pipe component 4 are the same as the first sensor boss 1, the pipe 2, and the second pipe component 4 in the sensor boss mounting structure 100 of FIG. 1A, respectively. Therefore, the description thereof will be omitted.

＜第２センサ用ボス＞
第２センサ用ボス５は、配管２の外周面に配置された配管部品である。第２センサ用ボス５は、第１センサ用ボス１に取り付けられるセンサとは別のセンサを取り付けるための部材である。 <Boss for 2nd sensor>
The second sensor boss 5 is a piping component arranged on the outer peripheral surface of the piping 2. The second sensor boss 5 is a member for attaching a sensor different from the sensor attached to the first sensor boss 1.

本実施形態の第２センサ用ボス５は、第１センサ用ボス１と同じものである。第２センサ用ボス５は、第１センサ用ボス１に対し、配管２の軸方向に隣接して配置されている。また、第２センサ用ボス５は、第１センサ用ボス１を挟んで、第２配管部品４とは反対側に配置されている。 The second sensor boss 5 of the present embodiment is the same as the first sensor boss 1. The second sensor boss 5 is arranged adjacent to the first sensor boss 1 in the axial direction of the pipe 2. Further, the second sensor boss 5 is arranged on the side opposite to the second piping component 4 with the first sensor boss 1 interposed therebetween.

図４Ｂに示すように、第２センサ用ボス５は、本体部５１と、鍔部５２とを備える。鍔部５２は、中央部５２Ａと、第１突出部５２Ｂと、第２突出部５２Ｃと、第１連結部５２Ｄと、第２連結部５２Ｅとを有する。 As shown in FIG. 4B, the second sensor boss 5 includes a main body portion 51 and a collar portion 52. The collar portion 52 has a central portion 52A, a first protruding portion 52B, a second protruding portion 52C, a first connecting portion 52D, and a second connecting portion 52E.

第２センサ用ボス５の各部の形状及び機能は、第１センサ用ボス１の各部の形状及び機能と同じである。第２センサ用ボス５の本体部５１の中心軸Ｐ２は、第１センサ用ボス１の本体部１１の中心軸Ｐ１と平行である。 The shape and function of each part of the second sensor boss 5 is the same as the shape and function of each part of the first sensor boss 1. The central axis P2 of the main body 51 of the second sensor boss 5 is parallel to the central axis P1 of the main body 11 of the first sensor boss 1.

第１センサ用ボス１の本体部１１の軸方向から視て（つまり配管２の径方向から視て）、第１センサ用ボス１の第１突出部１２Ｂの先端以外における外周縁の接線Ｌ２，Ｌ３は、第１センサ用ボス１の本体部１１の中心軸Ｐ１と第２センサ用ボス５の本体部５１の中心軸Ｐ２とを結ぶ仮想直線Ｌ１と交差する。接線Ｌ２，Ｌ３は、仮想直線Ｌ１と平行であってもよい。 When viewed from the axial direction of the main body 11 of the first sensor boss 1 (that is, when viewed from the radial direction of the pipe 2), the tangent line L2 of the outer peripheral edge other than the tip of the first protruding portion 12B of the first sensor boss 1. L3 intersects the virtual straight line L1 connecting the central axis P1 of the main body 11 of the first sensor boss 1 and the central axis P2 of the main body 51 of the second sensor boss 5. The tangents L2 and L3 may be parallel to the virtual straight line L1.

［２−２．効果］
以上詳述した実施形態によれば、以下の効果が得られる。
（２ａ）第１センサ用ボス１の第１突出部１２Ｂの溶接時に、溶接トーチと第２センサ用ボス５との干渉を避けつつ、第１センサ用ボス１の溶接の品質を向上できる。また、第２センサ用ボス５の第２突出部５２Ｃ溶接時に、溶接トーチと第１センサ用ボス１との干渉を避けつつ、第２センサ用ボス５の溶接の品質を向上できる。 [2-2. effect]
According to the embodiment described in detail above, the following effects can be obtained.
(2a) When welding the first protrusion 12B of the first sensor boss 1, the welding quality of the first sensor boss 1 can be improved while avoiding interference between the welding torch and the second sensor boss 5. Further, when welding the second protruding portion 52C of the second sensor boss 5, the welding quality of the second sensor boss 5 can be improved while avoiding interference between the welding torch and the first sensor boss 1.

（２ｂ）第１センサ用ボス１及び第２センサ用ボス５によって、複数のセンサを排気ガス流路に近接して配置することができる。 (2b) The first sensor boss 1 and the second sensor boss 5 allow a plurality of sensors to be arranged close to the exhaust gas flow path.

［３．他の実施形態］
以上、本開示の実施形態について説明したが、本開示は、上記実施形態に限定されることなく、種々の形態を採り得ることは言うまでもない。 [3. Other embodiments]
Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take various forms.

（３ａ）上記実施形態のセンサ用ボスにおいて、鍔部の形状は一例である。例えば、図５Ａ及び図５Ｂに示すように、鍔部１２は１つの突出部１２Ｆを有してもよい。また、図５Ａに示すように、突出部１２Ｆの外縁は、一部が本体部１１の径方向内側に凹んでもよい。さらに、図５Ｂに示すように、突出部１２Ｆの外縁は、一部が直線であってもよい。また、図５Ｃ及び図５Ｄに示すように、鍔部１２は、３つ以上の突出部１２Ｆ，１２Ｇ，１２Ｈを有してもよい。 (3a) In the sensor boss of the above embodiment, the shape of the collar portion is an example. For example, as shown in FIGS. 5A and 5B, the collar portion 12 may have one protrusion 12F. Further, as shown in FIG. 5A, a part of the outer edge of the protruding portion 12F may be recessed inward in the radial direction of the main body portion 11. Further, as shown in FIG. 5B, the outer edge of the protruding portion 12F may be partially straight. Further, as shown in FIGS. 5C and 5D, the collar portion 12 may have three or more protruding portions 12F, 12G, 12H.

（３ｂ）上記実施形態のセンサ用ボスの取付構造において、第２センサ用ボスは、必ずしも第１センサ用ボスと同じものでなくてもよい。第２センサ用ボスは、第１センサ用ボスと異なる形状を有してもよい。また、第２センサ用ボスは、必ずしも先端の曲率半径が本体部の半径よりも小さい突出部を有しなくてもよい。 (3b) In the mounting structure of the sensor boss of the above embodiment, the second sensor boss does not necessarily have to be the same as the first sensor boss. The second sensor boss may have a different shape from the first sensor boss. Further, the boss for the second sensor does not necessarily have to have a protruding portion whose tip has a radius of curvature smaller than the radius of the main body.

（３ｃ）上記実施形態における１つの構成要素が有する機能を複数の構成要素として分散させたり、複数の構成要素が有する機能を１つの構成要素に統合したりしてもよい。また、上記実施形態の構成の一部を省略してもよい。また、上記実施形態の構成の少なくとも一部を、他の上記実施形態の構成に対して付加、置換等してもよい。なお、特許請求の範囲に記載の文言から特定される技術思想に含まれるあらゆる態様が本開示の実施形態である。 (3c) The functions of one component in the above embodiment may be dispersed as a plurality of components, or the functions of the plurality of components may be integrated into one component. Further, a part of the configuration of the above embodiment may be omitted. Further, at least a part of the configuration of the above embodiment may be added or replaced with the configuration of the other embodiment. It should be noted that all aspects included in the technical idea specified from the wording described in the claims are embodiments of the present disclosure.

１…第１センサ用ボス、２…配管、３…第１配管部品、４…第２配管部品、
５…第２センサ用ボス、１１…本体部、１２…鍔部、１２Ａ…中央部、
１２Ｂ…第１突出部、１２Ｃ…第２突出部、１２Ｄ…第１連結部、
１２Ｅ…第２連結部、１２Ｆ，１２Ｇ，１２Ｈ…突出部、５１…本体部、５２…鍔部、
５２Ａ…中央部、５２Ｂ…第１突出部、５２Ｃ…第２突出部、５２Ｄ…第１連結部、
５２Ｅ…第２連結部、１００…センサ用ボスの取付構造、１２１…第１領域、
１２２…第２領域、１２３…先端、２００…センサ用ボスの取付構造。 1 ... Boss for 1st sensor, 2 ... Piping, 3 ... 1st piping part, 4 ... 2nd piping part,
5 ... 2nd sensor boss, 11 ... main body, 12 ... collar, 12A ... central,
12B ... 1st protrusion, 12C ... 2nd protrusion, 12D ... 1st connection,
12E ... 2nd connecting part, 12F, 12G, 12H ... protruding part, 51 ... main body part, 52 ... collar part,
52A ... central part, 52B ... first protruding part, 52C ... second protruding part, 52D ... first connecting part,
52E ... 2nd connecting part, 100 ... Sensor boss mounting structure, 121 ... 1st area,
122 ... Second area, 123 ... Tip, 200 ... Sensor boss mounting structure.

Claims (4)

内燃機関の排気ガス流路にセンサを取り付けるためのセンサ用ボスであって、
前記センサを固定するように構成された円筒状の本体部と、
前記本体部の一方の端部に連結された鍔部と、
を備え、
前記鍔部は、
前記本体部の中心軸と平行な方向から視て前記本体部の外周面よりも内側に位置する中央部と、
前記中央部から前記本体部の径方向外側に突出する突出部と、
を有し、
前記本体部の中心軸と平行な方向から視た前記突出部の先端における曲率半径は、前記本体部の半径よりも小さい、センサ用ボス。 A sensor boss for attaching a sensor to the exhaust gas flow path of an internal combustion engine.
A cylindrical main body configured to fix the sensor, and
A collar connected to one end of the main body and
With
The collar is
A central portion located inside the outer peripheral surface of the main body when viewed from a direction parallel to the central axis of the main body, and a central portion.
A protruding portion protruding outward in the radial direction from the central portion and the main body portion,
Have,
A sensor boss whose radius of curvature at the tip of the protruding portion viewed from a direction parallel to the central axis of the main body is smaller than the radius of the main body. 内燃機関の排気ガスが流れるように構成された配管と、
前記配管の外周面に配置された第１センサ用ボスとしての請求項１に記載のセンサ用ボスと、
前記配管の外周面又は端部に配置された配管部品と、
を備え、
前記鍔部は、前記突出部が前記中央部と前記配管部品との間に配置される向きで前記配管の外周面に溶接される、センサ用ボスの取付構造。 Piping configured to allow the exhaust gas of the internal combustion engine to flow,
The sensor boss according to claim 1 as a first sensor boss arranged on the outer peripheral surface of the pipe.
Piping parts arranged on the outer peripheral surface or the end of the pipe, and
With
The flange portion is a sensor boss mounting structure in which the protruding portion is welded to the outer peripheral surface of the pipe in a direction in which the protruding portion is arranged between the central portion and the piping component. 請求項２に記載のセンサ用ボスの取付構造であって、
前記配管部品として、前記配管に前記センサとは別のセンサを取り付けるための第２センサ用ボスを備える、センサ用ボスの取付構造。 The mounting structure for the sensor boss according to claim 2.
A sensor boss mounting structure including a second sensor boss for mounting a sensor other than the sensor on the pipe as the piping component. 請求項３に記載のセンサ用ボスの取付構造であって、
前記第２センサ用ボスは、前記別のセンサを固定するように構成された筒状の本体部を備え、
前記第２センサ用ボスの前記本体部の中心軸は、前記第１センサ用ボスの前記本体部の中心軸と平行であり、
前記第１センサ用ボスの前記本体部の軸方向から視て、前記第１センサ用ボスの前記突出部の前記先端以外における外周縁の接線は、前記第１センサ用ボスの前記本体部の中心軸と前記第２センサ用ボスの前記本体部の中心軸とを結ぶ仮想直線と平行であるか、又は交差する、センサ用ボスの取付構造。 The sensor boss mounting structure according to claim 3.
The second sensor boss includes a tubular main body configured to fix the other sensor.
The central axis of the main body of the second sensor boss is parallel to the central axis of the main body of the first sensor boss.
When viewed from the axial direction of the main body of the first sensor boss, the tangent line of the outer peripheral edge of the protruding portion of the first sensor boss other than the tip is the center of the main body of the first sensor boss. A sensor boss mounting structure that is parallel to or intersects a virtual straight line connecting a shaft and the central axis of the main body of the second sensor boss.
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JP2013092120A (en) * 2011-10-26 2013-05-16 Futaba Industrial Co Ltd Weld structure of thin member and attachment member
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