JP2021107709A - Exhaust pipe and method for manufacturing exhaust pipe - Google Patents

Exhaust pipe and method for manufacturing exhaust pipe Download PDF

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JP2021107709A
JP2021107709A JP2020190267A JP2020190267A JP2021107709A JP 2021107709 A JP2021107709 A JP 2021107709A JP 2020190267 A JP2020190267 A JP 2020190267A JP 2020190267 A JP2020190267 A JP 2020190267A JP 2021107709 A JP2021107709 A JP 2021107709A
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main body
exhaust pipe
tubular
closed
insertion portion
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JP7116140B2 (en
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弘明 横山
Hiroaki Yokoyama
弘明 横山
梅本　博
Hiroshi Umemoto
博 梅本
輝生 畔▲柳▼
Teruo Azeyanagi
輝生 畔▲柳▼
祐治 古賀
Yuji Koga
祐治 古賀
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Futaba Industrial Co Ltd
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Futaba Industrial Co Ltd
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Abstract

To propose technique for suppressing deformation and damage of an exhaust pipe.SOLUTION: An exhaust pipe includes a tubular main body part and a closing part that is disposed in an opening of the main body part and closes a part or all of the opening. The exhaust pipe includes an insertion portion and an inserted portion. The insertion portion is provided in a first portion, which is any one of the main body part and the closing part, and has a tubular shape. The inserted portion is provided in a second portion, which is different one of the main body portion and the closed portion from the first portion, and has a tubular shape. The insertion portion is inserted into the inserted portion. The insertion portion is provided with a deformation structure that facilitates radial deformation of the insertion portion.SELECTED DRAWING: Figure 1

Description

本開示は、例えば内燃機関に用いられる排気管に関する。 The present disclosure relates to, for example, an exhaust pipe used in an internal combustion engine.

従来、排気管を構成する２部品を接合するときに、１つの部材をもう１つの部材に圧入し、その上で溶接する技術が用いられている。特許文献１には、車両用消音器であって、筒状のアウタシェルにアウタプレートの筒状部を圧入し、その後、レーザ溶接する技術が開示されている。 Conventionally, when joining two parts constituting an exhaust pipe, a technique of press-fitting one member into another member and welding on the other member has been used. Patent Document 1 discloses a vehicle silencer, in which a tubular portion of an outer plate is press-fitted into a tubular outer shell, and then laser welding is performed.

特開２００３−１１３７１４号公報Japanese Unexamined Patent Publication No. 2003-113714

圧入に必要な荷重は、圧入に係る２部品の僅かな寸法の差によって大きく変化する。２部品が設定された寸法公差を満たして製造されていても、外側の部品の寸法が小さく、内側の部品の寸法が大きい場合に、圧入に必要な荷重が大きくなってしまうことがある。圧入工程においてワークに加えられる荷重が大きくなると、変形や損傷が生じやすくなってしまう。 The load required for press-fitting varies greatly due to a slight dimensional difference between the two parts involved in press-fitting. Even if the two parts are manufactured to meet the set dimensional tolerances, the load required for press fitting may increase when the dimensions of the outer part are small and the dimensions of the inner part are large. When the load applied to the work in the press-fitting process becomes large, deformation and damage are likely to occur.

本開示の目的は、圧入部の密着性を確保しつつ排気管の変形や損傷を抑制する技術を提案することである。また本開示の別の目的は、排気管の製造を容易にする技術を提案することである。 An object of the present disclosure is to propose a technique for suppressing deformation and damage of an exhaust pipe while ensuring adhesion of a press-fitted portion. Another object of the present disclosure is to propose a technique for facilitating the manufacture of an exhaust pipe.

本開示の一態様は、筒状の本体部と、本体部の開口に配置され、開口の一部又は全部を塞ぐ閉塞部と、を備える排気管であって、挿入部と、被挿入部と、を備える。挿入部は、本体部及び閉塞部のうちのいずれか１つである第１部分に備えられており、筒状の形状である。被挿入部は、本体部及び閉塞部のうちの上記第１部分とは異なる１つである第２部分に備えられており、筒状の形状であって、挿入部が挿入される。挿入部には、挿入部の径方向への変形を促進する変形構造が設けられている。 One aspect of the present disclosure is an exhaust pipe including a tubular main body portion and a closed portion which is arranged in an opening of the main body portion and closes a part or all of the opening, and includes an insertion portion and an inserted portion. , Equipped with. The insertion portion is provided in the first portion, which is any one of the main body portion and the closing portion, and has a tubular shape. The inserted portion is provided in a second portion of the main body portion and the closed portion, which is different from the first portion, has a tubular shape, and the insertion portion is inserted. The insertion portion is provided with a deformation structure that promotes radial deformation of the insertion portion.

このような構成であれば、挿入部が変形構造を有するため、挿入部を被挿入部に挿入する際に、挿入部が内側に変形しやすくなる。そのため、挿入に必要な荷重が過剰に大きくなってしまうことが抑制される。その結果、挿入工程において、圧入部の密着性を確保するとともに、本体部及び閉塞部に加わる負荷が大きくなることに起因する、排気管の変形や損傷を抑制できる。 With such a configuration, since the insertion portion has a deformed structure, the insertion portion is likely to be deformed inward when the insertion portion is inserted into the inserted portion. Therefore, it is possible to prevent the load required for insertion from becoming excessively large. As a result, in the insertion step, the adhesion of the press-fitting portion can be ensured, and the deformation and damage of the exhaust pipe due to the increase in the load applied to the main body portion and the closing portion can be suppressed.

上述した排気管において、変形構造は、挿入部の挿入方向の端面に形成されたスリットを含んでもよい。このような構成であれば、スリットによって挿入部の挿入方向の端部の変形を促進できる。 In the exhaust pipe described above, the modified structure may include a slit formed in the end face of the insertion portion in the insertion direction. With such a configuration, the slit can promote the deformation of the end portion of the insertion portion in the insertion direction.

また上述した排気管において、変形構造は、挿入部の筒状部分の一部が挿入部の内側に向かって突出する突出部を含んでもよい。このような構成であれば、突出部によって挿入部の変形を促進できる。なぜならば、突出部が形成されることで、筒状部分の一部が内側に入り込み、それにより筒状部分が中心側に変形するための空間が形成されるためである。 Further, in the exhaust pipe described above, the modified structure may include a protruding portion in which a part of the tubular portion of the insertion portion projects inward of the insertion portion. With such a configuration, the protrusion can promote the deformation of the insertion portion. This is because the protrusion is formed so that a part of the tubular portion enters the inside, thereby forming a space for the tubular portion to be deformed toward the center side.

また上述した排気管において、挿入部及び被挿入部は溶接されていてもよい。変形構造は、溶接された部分よりも挿入部の挿入方向側に位置してもよい。このような構成であれば、変形構造の形状による制約を受けることなく本体部と閉塞部との重なり部分が溶接されるので、溶接による本体部と閉塞部との接合を好適に行うことができる。 Further, in the exhaust pipe described above, the insertion portion and the insertion portion may be welded. The deformed structure may be located closer to the insertion direction of the insertion portion than the welded portion. With such a configuration, since the overlapping portion between the main body portion and the closed portion is welded without being restricted by the shape of the deformed structure, the main body portion and the closed portion can be preferably joined by welding. ..

本開示の別の一態様は、筒状の本体部と、本体部の開口に配置され、開口の一部又は全部を塞ぐ閉塞部と、を備える排気管の製造方法である。排気管は、挿入部と、被挿入部と、を備える。挿入部は、本体部及び閉塞部のうちのいずれか１つである第１部分に備えられており、筒状である。被挿入部は、本体部及び閉塞部のうちの上記第１部分とは異なる第２部分に備えられており、挿入部が挿入可能な筒状である。挿入部には、挿入部の径方向への変形を促進する変形構造が設けられている。そして上記製造方法では、挿入部を被挿入部に挿入することと、変形構造が設けられた位置よりも、挿入部の挿入方向とは反対方向の側において挿入部及び被挿入部を溶接することと、を含む。 Another aspect of the present disclosure is a method of manufacturing an exhaust pipe including a tubular main body portion and a closing portion arranged at an opening of the main body portion and closing a part or all of the opening. The exhaust pipe includes an insertion portion and an insertion portion. The insertion portion is provided in the first portion, which is any one of the main body portion and the closing portion, and has a tubular shape. The inserted portion is provided in a second portion of the main body portion and the closed portion, which is different from the first portion, and the insertion portion has a tubular shape into which the insertion portion can be inserted. The insertion portion is provided with a deformation structure that promotes radial deformation of the insertion portion. Then, in the above manufacturing method, the insertion portion is inserted into the inserted portion, and the insertion portion and the inserted portion are welded on the side opposite to the insertion direction of the insertion portion from the position where the deformed structure is provided. And, including.

このような製造方法であれば、挿入部が変形構造を有するため、挿入部を被挿入部に挿入する際に挿入部が内側に変形しやすくなる。そのため、挿入に必要な荷重が過剰に大きくなってしまうことが抑制され、排気管の製造を容易にすることができる。また、本体部と閉塞部との溶接を変形構造とは異なる位置で行うため、変形構造の形状による制約を受けることなく本体部と閉塞部との重なり部分を溶接でき、本体部と閉塞部との接合を好適に行うことができる。 In such a manufacturing method, since the insertion portion has a deformed structure, the insertion portion is easily deformed inward when the insertion portion is inserted into the inserted portion. Therefore, it is possible to prevent the load required for insertion from becoming excessively large, and facilitate the manufacture of the exhaust pipe. Further, since the main body and the closed portion are welded at a position different from the deformed structure, the overlapping portion between the main body and the closed portion can be welded without being restricted by the shape of the deformed structure, and the main body and the closed portion can be welded together. Can be suitably joined.

排気管の一例である第１実施形態の消音器を示す分解斜視図である。It is an exploded perspective view which shows the silencer of 1st Embodiment which is an example of an exhaust pipe. 第１実施形態の消音器の断面図である。It is sectional drawing of the silencer of 1st Embodiment. 第１実施形態の消音機の第１閉塞部と本体部の端部とを示す拡大図である。It is an enlarged view which shows the 1st block part and the end part of the main body part of the silencer of 1st Embodiment. 第１実施形態の消音機の第１閉塞部と本体部の端部とを示す断面図である。It is sectional drawing which shows the 1st block part and the end part of the main body part of the silencer of 1st Embodiment. 第１実施形態の変形例の消音器の断面図である。It is sectional drawing of the silencer of the modification of 1st Embodiment. 第１実施形態の変形例の消音器の断面図である。It is sectional drawing of the silencer of the modification of 1st Embodiment. 第２実施形態の消音器の分解斜視図である。It is an exploded perspective view of the silencer of 2nd Embodiment.

以下に本開示の実施形態を図面と共に説明する。
［１．第１実施形態］
［１−１．消音器の構成］
図１〜図３に示される消音器１は、内燃機関の排気ガス流路を構成する排気システムに用いられる消音器である。この消音器１は、本体部１１、第１閉塞部１２、及び第２閉塞部１３を備える。消音器１は、インレットパイプ１４及びアウトレットパイプ１５（以下、これらを単にパイプとも記載する）を備えていてもよい。 Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
[1. First Embodiment]
[1-1. Silencer configuration]
The silencer 1 shown in FIGS. 1 to 3 is a silencer used in an exhaust system constituting an exhaust gas flow path of an internal combustion engine. The silencer 1 includes a main body portion 11, a first closing portion 12, and a second closing portion 13. The silencer 1 may include an inlet pipe 14 and an outlet pipe 15 (hereinafter, these are also simply referred to as pipes).

本体部１１は、いわゆるアウタシェルであり、筒状形状である。図２に示す中心軸Ａは、本体部１１、第１閉塞部１２、及び第２閉塞部１３の中心軸Ａである。本開示において、中心軸とは、筒状形状を有する部分に関して、その断面における重心位置を通過する直線である。本体部１１の中心軸Ａと直交する平面による断面形状は正円ではなく、楕円形に近い形状である。この本体部１１は中心軸Ａの長さ方向の両端に開口が形成されている。２つ開口を形成する２つの開口端部１１ａは、本体部１１と同じく筒状の形状である。本体部１１の内部には、パイプを本体部１１の内部で固定するとともに、本体部１１の内部空間を仕切る２つの仕切り壁１６が設けられる。 The main body 11 is a so-called outer shell and has a tubular shape. The central axis A shown in FIG. 2 is the central axis A of the main body portion 11, the first closed portion 12, and the second closed portion 13. In the present disclosure, the central axis is a straight line passing through the position of the center of gravity in the cross section of the portion having a tubular shape. The cross-sectional shape of the main body 11 on a plane orthogonal to the central axis A is not a perfect circle but a shape close to an ellipse. The main body 11 has openings formed at both ends of the central axis A in the length direction. The two opening end portions 11a forming the two openings have a tubular shape like the main body portion 11. Inside the main body 11, the pipe is fixed inside the main body 11, and two partition walls 16 for partitioning the internal space of the main body 11 are provided.

第１閉塞部１２は、いわゆるアウタプレート又はエンドプレートである。第１閉塞部１２には、筒部２１が備えられている。また第１閉塞部１２には、プレート部２２及び挿入孔２３が備えられていてもよい。 The first blocking portion 12 is a so-called outer plate or end plate. The first closing portion 12 is provided with a tubular portion 21. Further, the first closed portion 12 may be provided with a plate portion 22 and an insertion hole 23.

筒部２１は、本体部１１の開口端部１１ａに挿入可能な筒状形状である。筒部２１は開口端部１１ａに圧入されている。すなわち、圧入前の筒部２１の外縁形状は、本体部１１の内周形状と略同等または内周形状よりも僅かに大きい。筒部２１における開口端部１１ａへの挿入方向の端部には、テーパ部２１ａが設けられている。テーパ部２１ａは、挿入方向の先端ほど中心側に位置するテーパ形状である。 The tubular portion 21 has a tubular shape that can be inserted into the open end portion 11a of the main body portion 11. The tubular portion 21 is press-fitted into the open end portion 11a. That is, the outer edge shape of the tubular portion 21 before press fitting is substantially the same as the inner peripheral shape of the main body portion 11 or slightly larger than the inner peripheral shape. A tapered portion 21a is provided at the end of the tubular portion 21 in the insertion direction into the opening end 11a. The tapered portion 21a has a tapered shape located closer to the center of the tip in the insertion direction.

筒部２１には、４つのスリット２４が周方向に間隔を開けて形成されている。４つのスリット２４は、筒部２１の挿入方向の端面から中心軸Ａの長さ方向に延びている。
プレート部２２は、筒部２１の上記挿入方向とは反対の方向の端部から拡がっており、本体部１１の開口を覆う。このプレート部２２には上述した挿入孔２３が形成されており、インレットパイプ１４は挿入孔２３を通過するように配置される。 Four slits 24 are formed in the tubular portion 21 at intervals in the circumferential direction. The four slits 24 extend in the length direction of the central axis A from the end surface of the tubular portion 21 in the insertion direction.
The plate portion 22 extends from the end portion of the tubular portion 21 in a direction opposite to the insertion direction, and covers the opening of the main body portion 11. The above-mentioned insertion hole 23 is formed in the plate portion 22, and the inlet pipe 14 is arranged so as to pass through the insertion hole 23.

第２閉塞部１３は、上述した第１閉塞部１２と同様の特徴を有している。すなわち、筒部３１、テーパ部３１ａ、プレート部３２、挿入孔３３、及び４つのスリット３４を有している。これらの構成は、筒部２１、テーパ部２１ａ、プレート部２２、挿入孔２３、及びスリット２４と同様である。 The second closed portion 13 has the same characteristics as the first closed portion 12 described above. That is, it has a tubular portion 31, a tapered portion 31a, a plate portion 32, an insertion hole 33, and four slits 34. These configurations are the same as those of the tubular portion 21, the tapered portion 21a, the plate portion 22, the insertion hole 23, and the slit 24.

［１−２．消音器の製造方法］
消音器１の製造方法を説明する。まず２つの仕切り壁１６に対してインレットパイプ１４及びアウトレットパイプ１５を固定する。その後、組み付けたパイプ及び仕切り壁１６を、本体部１１に挿入する。 [1-2. Silencer manufacturing method]
A method of manufacturing the silencer 1 will be described. First, the inlet pipe 14 and the outlet pipe 15 are fixed to the two partition walls 16. After that, the assembled pipe and the partition wall 16 are inserted into the main body 11.

続いて、第１閉塞部１２を一対の開口端部１１ａの一方に挿入する。上述したように、第１閉塞部１２は開口端部１１ａに圧入される。この圧入は、圧入装置を用いて行われる。 Subsequently, the first closed portion 12 is inserted into one of the pair of open end portions 11a. As described above, the first closed portion 12 is press-fitted into the open end portion 11a. This press-fitting is performed using a press-fitting device.

続いて、本体部１１と第１閉塞部１２とを溶接する。図４に示されるように、本体部１１の端面１１ｂは筒部２１と重なるように配置されている。この端面１１ｂ付近、より好ましくは端面１１ｂからスリット２４までの間、より好ましくは端面１１ｂに沿って溶接が行われ、溶接ビードが形成される。つまり端面１１ｂに沿う位置または端面１１ｂに近い位置で溶接線が形成される。なおスリット２４の挿入方向と反対の先端は、端面１１ｂよりも挿入方向側に位置している。すなわち、本体部１１と第１閉塞部１２との溶接は、スリット２４よりも挿入方向と反対方向の側の位置にて行われる。 Subsequently, the main body portion 11 and the first closed portion 12 are welded. As shown in FIG. 4, the end surface 11b of the main body portion 11 is arranged so as to overlap the tubular portion 21. Welding is performed in the vicinity of the end face 11b, more preferably between the end face 11b and the slit 24, more preferably along the end face 11b, and a welding bead is formed. That is, the welding line is formed at a position along the end face 11b or a position close to the end face 11b. The tip of the slit 24 opposite to the insertion direction is located on the insertion direction side of the end surface 11b. That is, the welding of the main body portion 11 and the first closing portion 12 is performed at a position on the side opposite to the insertion direction with respect to the slit 24.

第２閉塞部１３は、第１閉塞部１２と同様に、開口端部１１ａに圧入され、その後、溶接される。なお、第１閉塞部１２の溶接が完了した後に第２閉塞部１３の圧入を行ってもよいし、第１閉塞部１２及び第２閉塞部１３の圧入の後に第１閉塞部１２及び第２閉塞部１３の溶接を行ってもよい。なお第２閉塞部１３の挿入方向は、第１閉塞部１２の挿入方向とは反対向きになる。 The second closed portion 13 is press-fitted into the open end portion 11a and then welded, similarly to the first closed portion 12. The second closed portion 13 may be press-fitted after the welding of the first closed portion 12 is completed, or the first closed portion 12 and the second closed portion 12 and the second closed portion 12 may be press-fitted after the first closed portion 12 and the second closed portion 13 are press-fitted. Welding of the closed portion 13 may be performed. The insertion direction of the second closing portion 13 is opposite to the insertion direction of the first closing portion 12.

［１−３．効果］
以上詳述した第１実施形態によれば、以下の効果が得られる。
（１ａ）本実施形態の消音器１では、第１閉塞部１２の筒部２１が４つのスリット２４を有するため、筒部２１を開口端部１１ａに挿入する際に、筒部２１が内側に変形しやすい。そのため、筒部２１と開口端部１１ａとの密着性を確保しつつも、筒部２１の挿入に必要な荷重が過剰に大きくなってしまうことが抑制される。その結果、挿入工程を容易に行うことができる。また、挿入工程において本体部１１及び第１閉塞部１２に加わる負荷が大きくなることに起因する、消音器１の変形や損傷を抑制できる。なお、第２閉塞部１３についても、第１閉塞部１２と同様の形状を有しているため、同様の効果を奏する。 [1-3. effect]
According to the first embodiment described in detail above, the following effects can be obtained.
(1a) In the silencer 1 of the present embodiment, since the tubular portion 21 of the first closing portion 12 has four slits 24, when the tubular portion 21 is inserted into the open end portion 11a, the tubular portion 21 is moved inward. Easy to deform. Therefore, while ensuring the close contact between the tubular portion 21 and the open end portion 11a, it is possible to prevent the load required for inserting the tubular portion 21 from becoming excessively large. As a result, the insertion step can be easily performed. Further, it is possible to suppress deformation and damage of the silencer 1 due to an increase in the load applied to the main body portion 11 and the first closing portion 12 in the insertion step. Since the second closed portion 13 has the same shape as the first closed portion 12, the same effect can be obtained.

（１ｂ）４つのスリット２４は、筒部２１の挿入方向の端面１１ｂから挿入部の中心軸Ａの長さ方向に延びる。このような構成であれば、スリット２４によって第１閉塞部１２の挿入方向の端部の変形を促進できる。なぜならば、スリット２４の存在により筒部２１の周囲の強度が低くなることに加え、筒部２１が中心側に変形するための周方向の隙間がスリット２４により形成されるためである。仮に周方向の隙間が存在しない場合、筒部２１の全周に中心軸Ａに向かう力が加えられたとしても、筒部２１が偏りなく変形するためには筒部２１が縮径するより他ない。しかしながら、金属材料ではそのような変形は困難である。その結果、加えられた力は筒部２１の周方向の応力に打ち消されてしまうこととなり、荷重を加えても筒部２１は中心軸Ａ方向に変形しにくい。しかしながら、スリット２４によって上記の問題が生じにくくなり、変形しやすくなる。 (1b) The four slits 24 extend from the end surface 11b of the tubular portion 21 in the insertion direction in the length direction of the central axis A of the insertion portion. With such a configuration, the slit 24 can promote the deformation of the end portion of the first closing portion 12 in the insertion direction. This is because the presence of the slit 24 lowers the strength around the tubular portion 21, and the slit 24 forms a circumferential gap for the tubular portion 21 to deform toward the center. If there is no gap in the circumferential direction, even if a force toward the central axis A is applied to the entire circumference of the tubular portion 21, the diameter of the tubular portion 21 must be reduced in order for the tubular portion 21 to be deformed without bias. do not have. However, such deformation is difficult with metallic materials. As a result, the applied force is canceled by the stress in the circumferential direction of the tubular portion 21, and the tubular portion 21 is hardly deformed in the central axis A direction even when a load is applied. However, the slit 24 makes it difficult for the above problem to occur and makes it easy to deform.

（１ｃ）上記消音器１において、本体部１１と第１閉塞部１２は、開口端部１１ａと第１閉塞部１２とを溶接することにより接合されている。本体部１１と第１閉塞部１２との溶接は、スリット２４よりも挿入方向と反対方向の位置にて行われる。すなわち、スリット２４は、溶接が為された部分よりも筒部２１の挿入方向側に位置している。そのため、スリット２４によって溶接が適切に行えなくなる危険が抑制されるので、溶接による本体部１１と第１閉塞部１２との接合を好適に行うことができる。 (1c) In the silencer 1, the main body portion 11 and the first closed portion 12 are joined by welding the open end portion 11a and the first closed portion 12. Welding of the main body portion 11 and the first closing portion 12 is performed at a position opposite to the insertion direction from the slit 24. That is, the slit 24 is located on the insertion direction side of the tubular portion 21 with respect to the welded portion. Therefore, since the risk that welding cannot be performed properly is suppressed by the slit 24, the main body portion 11 and the first closed portion 12 can be preferably joined by welding.

［１−４．対応関係］
第１実施形態において、消音器１が排気管の一例である。また、第１閉塞部１２及び第２閉塞部１３が閉塞部の一例である。また、筒部２１が挿入部の一例であり、開口端部１１ａが被挿入部の一例である。また、複数のスリット２４、３４が、変形構造の一例である。本第１実施形態では、第１閉塞部１２及び第２閉塞部１３が、挿入部を備える第１部分に対応し、本体部１１が、被挿入部を備える第２部分に対応する。 [1-4. Correspondence]
In the first embodiment, the silencer 1 is an example of an exhaust pipe. Further, the first closed portion 12 and the second closed portion 13 are examples of the closed portions. Further, the tubular portion 21 is an example of the insertion portion, and the open end portion 11a is an example of the inserted portion. Further, the plurality of slits 24 and 34 are examples of the deformed structure. In the first embodiment, the first closed portion 12 and the second closed portion 13 correspond to the first portion including the insertion portion, and the main body portion 11 corresponds to the second portion including the inserted portion.

なお、挿入部の径方向への変形を促進する変形構造とは、以下のような構造である。挿入部に変形構造が設けられている場合と変形構造が設けられていない場合とを比較したときに、挿入部に対して中心軸に向かう荷重を加えると、変形構造が設けられている場合の方がより大きく挿入部が径方向内側に変形する。すなわち、挿入部を径方向内側の同じ位置まで変形させようとするとき、変形構造が設けられている場合の方が、小さい力で変形が実現できる。 The deformed structure that promotes the radial deformation of the insertion portion is as follows. When comparing the case where the insertion part is provided with the deformed structure and the case where the deformation structure is not provided, when a load toward the central axis is applied to the insertion part, the case where the deformation structure is provided. The insertion part is deformed inward in the radial direction. That is, when trying to deform the insertion portion to the same position on the inner side in the radial direction, the deformation can be realized with a smaller force when the deformation structure is provided.

［１−５．第１実施形態の変形例］
第１実施形態では、変形構造としてスリットを備える消音器を例示した。しかしながら、変形構造はスリットでなくてもよい。 [1-5. Modification example of the first embodiment]
In the first embodiment, a silencer having a slit as a deformed structure has been exemplified. However, the deformed structure does not have to be a slit.

図５及び図６に示す消音器１０１は、スリットに類似する機能を有する変形構造を有する消音器の例である。消音器１０１は、消音器１と比較して、スリット２４を有しておらず、スリット２４の変わりに４つの突出部１０３を備える。突出部１０３は、挿入部の筒状部分の一部が挿入部の中心軸に向かって突出するように押し出された形状である。突出部１０３は、筒部２１の挿入方向の端部から挿入方向とは反対側に向かって長さを有している。 The silencer 101 shown in FIGS. 5 and 6 is an example of a silencer having a deformed structure having a function similar to a slit. The silencer 101 does not have the slit 24 as compared with the silencer 1, and includes four protrusions 103 instead of the slit 24. The protruding portion 103 has a shape in which a part of the tubular portion of the insertion portion is extruded so as to project toward the central axis of the insertion portion. The protruding portion 103 has a length from the end portion of the tubular portion 21 in the insertion direction toward the side opposite to the insertion direction.

このような構成であれば、突出部１０３によって筒部２１の弾性変形を促進できる。なぜならば、突出部１０３が形成されることで、その内部の空間が、上記（１ｂ）にて説明する「筒部２１が中心側に変形するための周方向の隙間」となるためである。また、突出部１０３は、筒部２１における突出部１０３の周囲の部分よりも屈曲しやすいため、それによっても変形を促進できる。 With such a configuration, the protruding portion 103 can promote the elastic deformation of the tubular portion 21. This is because the protrusion 103 is formed, and the space inside the protrusion 103 becomes the "gap in the circumferential direction for the tubular portion 21 to be deformed toward the center" described in (1b) above. Further, since the protruding portion 103 is more easily bent than the portion around the protruding portion 103 in the tubular portion 21, deformation can be promoted by this as well.

突出部１０３の形状は図６に示されるような半円形状でなくてもよい。例えば、突出した中心側の先端が尖った形であってもよい。また、筒部２１の周方向に長さを有していてもよい。 The shape of the protrusion 103 does not have to be a semicircular shape as shown in FIG. For example, the tip on the protruding center side may be sharp. Further, the tubular portion 21 may have a length in the circumferential direction.

［２．第２実施形態］
［２−１．消音器の構成］
第２実施形態は、排気管の一例として、第１実施形態と異なる形状の排気管を例示する。 [2. Second Embodiment]
[2-1. Silencer configuration]
The second embodiment exemplifies an exhaust pipe having a shape different from that of the first embodiment as an example of the exhaust pipe.

図７に示される触媒ケース２０１は、内燃機関の排気ガス流路を構成する排気システムに用いられる。この触媒ケース２０１は、本体部２１１、第１閉塞部２１２、及び第２閉塞部２１３を備える。 The catalyst case 201 shown in FIG. 7 is used in an exhaust system constituting an exhaust gas flow path of an internal combustion engine. The catalyst case 201 includes a main body portion 211, a first closed portion 212, and a second closed portion 213.

本体部２１１は、いわゆるアウタシェルであり、筒状形状である。本体部２１１は両端に開口が形成されている。２つ開口を形成する２つの開口端部２１１ａは、本体部２１１の全体と同じく筒状の形状である。 The main body 211 is a so-called outer shell and has a tubular shape. The main body 211 is formed with openings at both ends. The two opening end portions 211a forming the two openings have a tubular shape similar to the entire main body portion 211.

第１閉塞部２１２は、いわゆるアウタプレート又はエンドプレートである。第１閉塞部２１２には、筒部２２１が備えられている。また第１閉塞部２１２には、テーパ壁部２２２及び挿入口２２３が備えられていてもよい。 The first obstruction portion 212 is a so-called outer plate or end plate. The first closing portion 212 is provided with a tubular portion 221. Further, the first closing portion 212 may be provided with a tapered wall portion 222 and an insertion port 223.

筒部２２１は、開口端部２１１ａに圧入可能な筒状形状である。筒部２２１には、筒部２２１の挿入方向の端面から中心軸の長さ方向に延びる４つのスリット２２４が、周方向に間隔を開けて形成されている。 The tubular portion 221 has a tubular shape that can be press-fitted into the open end portion 211a. The tubular portion 221 is formed with four slits 224 extending in the length direction of the central axis from the end surface of the tubular portion 221 in the insertion direction at intervals in the circumferential direction.

第２閉塞部２１３は、上述した第１閉塞部２１２と同様の特徴を有している。すなわち、筒部２３１、テーパ壁部２３２、挿入口２３３、及び４つのスリット２３４を有している。これらの構成は、筒部２２１、テーパ壁部２２２、挿入口２２３、及びスリット２２４と同様である。 The second closed portion 213 has the same characteristics as the first closed portion 212 described above. That is, it has a tubular portion 231 and a tapered wall portion 232, an insertion port 233, and four slits 234. These configurations are the same as those of the tubular portion 221 and the tapered wall portion 222, the insertion port 223, and the slit 224.

触媒ケース２０１の製造方法を説明する。第１閉塞部２１２を一対の開口端部２１１ａの一方に圧入する。そして、第１閉塞部２１２と本体部２１１を溶接する。本体部２１１と第１閉塞部２１２との溶接は、スリット２２４よりも挿入方向と反対方向の側の位置にて行われる。第２閉塞部２１３も第１閉塞部２１２と同様に、開口端部２１１ａに圧入され、その後、溶接される。 A method of manufacturing the catalyst case 201 will be described. The first closed portion 212 is press-fitted into one of the pair of open end portions 211a. Then, the first closed portion 212 and the main body portion 211 are welded. Welding of the main body portion 211 and the first closing portion 212 is performed at a position on the side opposite to the insertion direction with respect to the slit 224. The second closed portion 213 is also press-fitted into the open end portion 211a and then welded in the same manner as the first closed portion 212.

以上詳述した第２実施形態によれば、前述した第１実施形態の効果（１ａ）〜（１ｃ）と同等の効果を奏する。
［２−２．対応関係］
第２実施形態において、触媒ケース２０１が排気管の一例である。また、第１閉塞部２１２及び第２閉塞部２１３が閉塞部の一例である。また、筒部２２１が挿入部の一例であり、開口端部２１１ａが被挿入部の一例である。また、複数のスリット２２４、２３４が、変形構造の一例である。本第２実施形態では、第１閉塞部２１２及び第２閉塞部２１３が挿入部を備える第１部分に対応し、本体部２１１が被挿入部を備える第２部分に対応する。 According to the second embodiment described in detail above, the same effect as the effects (1a) to (1c) of the first embodiment described above can be obtained.
[2-2. Correspondence]
In the second embodiment, the catalyst case 201 is an example of an exhaust pipe. Further, the first closed portion 212 and the second closed portion 213 are examples of the closed portions. Further, the tubular portion 221 is an example of an insertion portion, and the open end portion 211a is an example of an inserted portion. Further, the plurality of slits 224 and 234 are examples of the deformed structure. In the second embodiment, the first closed portion 212 and the second closed portion 213 correspond to the first portion including the insertion portion, and the main body portion 211 corresponds to the second portion including the inserted portion.

［３．その他の実施形態］
以上本開示の実施形態について説明したが、本開示は、上記実施形態に何ら限定されることはなく、本開示の技術的範囲に属する限り種々の形態をとり得ることはいうまでもない。 [3. Other embodiments]
Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and it goes without saying that various embodiments can be taken as long as they belong to the technical scope of the present disclosure.

（３ａ）上記各実施形態では、排気管の例として消音器及び触媒ケースを例示した。しかしながら、本開示の排気管は消音器及び触媒ケースに限定されるものではなく、排気管を構成する様々な部品において採用することができる。ここでいう排気管とは、たとえば、内燃機関の排気のために用いられる配管を広く意味する。 (3a) In each of the above embodiments, a silencer and a catalyst case are illustrated as examples of the exhaust pipe. However, the exhaust pipe of the present disclosure is not limited to the silencer and the catalyst case, and can be adopted in various parts constituting the exhaust pipe. The exhaust pipe referred to here broadly means, for example, a pipe used for exhausting an internal combustion engine.

（３ｂ）上記各実施形態では、第１閉塞部及び第２閉塞部が、挿入部を備える第１部分に相当し、本体部が被挿入部を備える第２部分に相当する構成を例示した。しかしながら、第１閉塞部及び第２閉塞部が被挿入部であり、本体部が挿入部であってもよい。すなわち、本体部の端部の外縁形状が、第１閉塞部及び第２閉塞部よりも小さく構成されていてもよい。 (3b) In each of the above embodiments, the first closed portion and the second closed portion correspond to the first portion including the insertion portion, and the main body portion corresponds to the second portion including the inserted portion. However, the first closed portion and the second closed portion may be the inserted portions, and the main body portion may be the inserted portion. That is, the outer edge shape of the end portion of the main body portion may be smaller than that of the first closed portion and the second closed portion.

（３ｃ）上記各実施形態では、変形構造の例として、スリット又は突出部を示した。しかしながら、変形を促進できる構成であれば、変形構造は、上述した構成以外であってもよい。例えば、変形構造は、周囲よりも肉薄に構成された部分や、周囲よりも柔軟性が高い材料で形成された部分であってもよい。また、変形構造は、スリット及び突出部の両方を有していてもよい。なお、挿入部に設けられる変形構造の数は特に限定されず、１つ〜３つであってもよいし、５つ以上であってもよい。上記各実施形態では、スリットは端面に形成された、いわゆる切欠きである構成を例示した。しかしながら、スリットは、周囲が閉じられた隙間であってもよい。また、スリット及び突出部は、挿入部の周方向に長さを有していてもよい。 (3c) In each of the above embodiments, a slit or a protruding portion is shown as an example of the deformed structure. However, the deformed structure may be other than the above-described structure as long as the structure can promote the deformation. For example, the deformed structure may be a portion formed thinner than the surroundings or a portion formed of a material having higher flexibility than the surroundings. Further, the deformed structure may have both a slit and a protruding portion. The number of deformed structures provided in the insertion portion is not particularly limited, and may be 1 to 3, or 5 or more. In each of the above embodiments, the slit is formed on the end face, which is a so-called notch. However, the slit may be a gap whose circumference is closed. Further, the slit and the protruding portion may have a length in the circumferential direction of the insertion portion.

（３ｄ）上記各実施形態では、スリット及び突出部よりも挿入方向と反対方向の位置にて溶接が為される構成を例示した。しかしながら、変形構造が設けられた位置において溶接が為されてもよい。また、挿入部と被挿入部の溶接をしない構成であってもよい。 (3d) In each of the above embodiments, a configuration in which welding is performed at a position opposite to the insertion direction from the slit and the protruding portion is illustrated. However, welding may be performed at a position where the deformed structure is provided. Further, the structure may be such that the insertion portion and the insertion portion are not welded.

（３ｅ）本体部、閉塞部、挿入部、及び被挿入部の具体的な形状は、上記各実施形態において開示した構成に限定されない。例えば、挿入部及び被挿入部の断面形状は、円形、楕円形、それらに近い円状形状、及び、多角形のような形状であってもよい。挿入部は、大きな加圧を行わない方法で被挿入部に挿入されてもよい。本体部は、長さ方向に関して断面形状が変化してもよい。閉塞部は１つのみが用いられてもよい。 (3e) The specific shapes of the main body portion, the closing portion, the insertion portion, and the inserted portion are not limited to the configurations disclosed in each of the above embodiments. For example, the cross-sectional shape of the insertion portion and the insertion portion may be a circular shape, an elliptical shape, a circular shape close to them, or a polygonal shape. The insertion portion may be inserted into the insertion portion by a method that does not apply a large amount of pressure. The cross-sectional shape of the main body may change with respect to the length direction. Only one obstruction may be used.

なお、本開示における閉塞部は、本体部の開口の一部又は全部を塞ぐように構成されていればよい。ここでいう「開口の一部を塞ぐ」とは、上述した各実施形態のように、本体部の開口部分の断面積と、閉塞部の開口部分の断面積と、を比較したときに、閉塞部の開口部分の断面積が小さいことを意味する。閉塞部の開口部分とは、第１実施形態の消音器１における第１閉塞部１２の挿入孔２３及び第２閉塞部１３の挿入孔３３、並びに、第２実施形態の触媒ケース２０１における第１閉塞部２１２の挿入口２２３及び第２閉塞部２１３の挿入口２３３が該当する。また、閉塞部が開口の全部を塞ぐ場合、例えば本体部の筒状の壁面に貫通孔が形成されており、その孔を通って流体が流れるように構成されていてもよい。 The closed portion in the present disclosure may be configured to close a part or all of the opening of the main body portion. The term "close a part of the opening" as used herein means that when the cross-sectional area of the opening portion of the main body and the cross-sectional area of the opening portion of the closing portion are compared, as in each of the above-described embodiments, the closing is performed. It means that the cross-sectional area of the opening portion of the portion is small. The opening portion of the closed portion is the insertion hole 23 of the first closed portion 12 and the insertion hole 33 of the second closed portion 13 in the silencer 1 of the first embodiment, and the first in the catalyst case 201 of the second embodiment. The insertion port 223 of the closing portion 212 and the insertion port 233 of the second closing portion 213 correspond to each other. Further, when the closing portion closes the entire opening, for example, a through hole may be formed in the tubular wall surface of the main body portion so that the fluid can flow through the hole.

（３ｆ）上記実施形態における１つの構成要素が有する複数の機能を、複数の構成要素によって実現したり、１つの構成要素が有する１つの機能を、複数の構成要素によって実現したりしてもよい。また、複数の構成要素が有する複数の機能を、１つの構成要素によって実現したり、複数の構成要素によって実現される１つの機能を、１つの構成要素によって実現したりしてもよい。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又は置換してもよい。 (3f) A plurality of functions possessed by one component in the above embodiment may be realized by a plurality of components, or one function possessed by one component may be realized by a plurality of components. .. Further, a plurality of functions possessed by the plurality of components may be realized by one component, or one function realized by the plurality of components may be realized by one component. Further, a part of the configuration of the above embodiment may be omitted. In addition, at least a part of the configuration of the above embodiment may be added or replaced with the configuration of the other above embodiment.

１，１０１，２０１…消音器、１１，２１１…本体部、１１a…端部、１１ａ，２１１ａ…開口端部、１１ｂ…端面、１２，２１２…第１閉塞部、１３，２１３…第２閉塞部、１４…インレットパイプ、１５…アウトレットパイプ、１６…仕切り壁、２１，３１，２２１，２３１…筒部、２１ａ，３１ａ…テーパ部、２２，３２…プレート部、２３，３３…挿入孔、２４，３４，２２４，２３４…スリット、１０３…突出部、２２２，２３２…テーパ壁部、２２３，２３３…挿入口 1,101,201 ... silencer 11,211 ... main body, 11a ... end, 11a, 211a ... open end, 11b ... end face, 12,212 ... first obstruction, 13,213 ... second obstruction , 14 ... inlet pipe, 15 ... outlet pipe, 16 ... partition wall, 21,31,221,231 ... cylinder part, 21a, 31a ... taper part, 22, 32 ... plate part, 23, 33 ... insertion hole, 24, 34,224,234 ... slit, 103 ... protruding part, 222,232 ... tapered wall part, 223,233 ... insertion port

Claims (5)

筒状の本体部と、前記本体部の開口に配置され、該開口の一部又は全部を塞ぐ閉塞部と、を備える排気管であって、
前記本体部及び前記閉塞部のうちのいずれか１つである第１部分に備えられる筒状の挿入部と、
前記本体部及び前記閉塞部のうちの前記第１部分とは異なる１つである第２部分に備えられ、筒状であって、前記挿入部が挿入された被挿入部と、を備え、
前記挿入部には、該挿入部の径方向への変形を促進する変形構造が設けられている、排気管。 An exhaust pipe including a tubular main body portion and a closing portion arranged in an opening of the main body portion and closing a part or all of the opening.
A tubular insertion portion provided in the first portion, which is one of the main body portion and the closing portion, and
A second portion of the main body portion and the closing portion, which is different from the first portion, is provided, and is provided with a tubular portion to be inserted into which the insertion portion is inserted.
The exhaust pipe is provided with a deformation structure that promotes radial deformation of the insertion portion. 請求項１に記載の排気管であって、
前記変形構造は、前記挿入部の挿入方向の端面に形成されたスリットを含む、排気管。 The exhaust pipe according to claim 1.
The modified structure is an exhaust pipe including a slit formed in an end surface of the insertion portion in the insertion direction. 請求項１に記載の排気管であって、
前記変形構造は、前記挿入部の筒状部分の一部が前記挿入部の内側に向かって突出する突出部を含む、排気管。 The exhaust pipe according to claim 1.
The modified structure is an exhaust pipe including a protruding portion in which a part of a tubular portion of the insertion portion projects inward of the insertion portion. 請求項１から請求項３のいずれか１項に記載の排気管であって、
前記挿入部及び前記被挿入部は溶接されており、
前記変形構造は、前記溶接された部分よりも前記挿入部の挿入方向側に位置する、排気管。 The exhaust pipe according to any one of claims 1 to 3.
The insertion portion and the insertion portion are welded together.
The deformed structure is an exhaust pipe located on the insertion direction side of the insertion portion with respect to the welded portion. 筒状の本体部と、前記本体部の開口に配置され、該開口の一部又は全部を塞ぐ閉塞部と、を備える排気管の製造方法であって、
前記排気管は、前記本体部及び前記閉塞部のうちのいずれか１つである第１部分に備えられる筒状の挿入部と、前記本体部及び前記閉塞部のうちの前記第１部分とは異なる１つである第２部分に備えられ、筒状であって、前記挿入部が挿入された被挿入部と、を備え、前記挿入部には該挿入部の径方向への変形を促進する変形構造が設けられており、
前記挿入部を前記被挿入部に挿入することと、
前記変形構造が設けられた位置よりも、前記挿入部の挿入方向とは反対方向の側において前記挿入部及び前記被挿入部を溶接することと、を含む、排気管の製造方法。 A method for manufacturing an exhaust pipe including a tubular main body portion and a closed portion arranged in an opening of the main body portion and closing a part or all of the opening.
The exhaust pipe has a tubular insertion portion provided in a first portion which is any one of the main body portion and the closed portion, and the first portion of the main body portion and the closed portion. A second portion, which is a different one, is provided with a tubular portion to be inserted into which the insertion portion is inserted, and the insertion portion promotes radial deformation of the insertion portion. A deformed structure is provided,
Inserting the insertion part into the insertion part and
A method for manufacturing an exhaust pipe, which comprises welding the insertion portion and the insertion portion on the side opposite to the insertion direction of the insertion portion from the position where the deformation structure is provided.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003113714A (en) * 2001-10-03 2003-04-18 Futaba Industrial Co Ltd Vehicular muffler
JP2013026191A (en) * 2011-07-26 2013-02-04 Sanyo Electric Co Ltd Power supply unit
JP2015161308A (en) * 2014-02-26 2015-09-07 エーバーシュペッヒャー・エグゾースト・テクノロジー・ゲーエムベーハー・ウント・コンパニー・カーゲー Funnel pipe arrangement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003113714A (en) * 2001-10-03 2003-04-18 Futaba Industrial Co Ltd Vehicular muffler
JP2013026191A (en) * 2011-07-26 2013-02-04 Sanyo Electric Co Ltd Power supply unit
JP2015161308A (en) * 2014-02-26 2015-09-07 エーバーシュペッヒャー・エグゾースト・テクノロジー・ゲーエムベーハー・ウント・コンパニー・カーゲー Funnel pipe arrangement

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