JP4546873B2

JP4546873B2 - Muffler hanger

Info

Publication number: JP4546873B2
Application number: JP2005132634A
Authority: JP
Inventors: 晋一藤本
Original assignee: UD Trucks Corp
Current assignee: UD Trucks Corp
Priority date: 2005-04-28
Filing date: 2005-04-28
Publication date: 2010-09-22
Anticipated expiration: 2025-04-28
Also published as: JP2006307767A

Description

本発明は、マフラーをシャシフレームに支持するマフラーハンガーに関する。 The present invention relates to a muffler hanger that supports a muffler on a chassis frame.

車両走行時の排気騒音を低減するため、従来、車両排気系にはマフラー（消音器）が装着されている。
而して、マフラーはエンジンの排気量が大きくなるに伴い、容量（内部空間容積）を確保するために大型化するが、トレーラを牽引するトラクタは、機動性をよくするためにホイールベースが普通のトラックに比し短いため、特許文献１または図６に示すようにケーシング１の外形形状が略方形体状に形成された短寸なマフラー３が使用されている。そして、排気ガスを導出入する排気導出管と排気導入管がケーシング１の一端板に挿着されており、排気導入管と排気マニホールドとの間に排気管が接続され、排気導出管には排気ガスを大気中に放出するテールパイプが接続されている。 Conventionally, a muffler (silencer) is attached to the vehicle exhaust system in order to reduce exhaust noise during vehicle travel.
Thus, as the displacement of the engine increases, the muffler increases in size to ensure capacity (internal space volume), but the tractor that pulls the trailer usually has a wheelbase to improve maneuverability. Therefore, a short muffler 3 in which the outer shape of the casing 1 is formed in a substantially rectangular shape is used as shown in Patent Document 1 or FIG. An exhaust outlet pipe and an exhaust inlet pipe for leading and exhausting exhaust gas are inserted into one end plate of the casing 1, and an exhaust pipe is connected between the exhaust inlet pipe and the exhaust manifold. A tail pipe that releases gas into the atmosphere is connected.

そして、トラクタの車載レイアウト上の制約から、マフラー３はシャシフレームのサイドメンバに取り付けられており、マフラー３には、サイドメンバに固定するための取付部材として断面円形形状の１本の取付パイプ５が、ケーシング１の一端板とケーシング１内部の仕切板を貫通して溶着等で固着されている。そして、取付パイプ５の先端部が、サイドメンバ側に固着された１個のマフラーハンガー７の差込み部９に締結されて、マフラー３がサイドメンバに取り付けられていた。 The muffler 3 is attached to the side member of the chassis frame due to restrictions on the in-vehicle layout of the tractor, and the muffler 3 has one attachment pipe 5 having a circular cross section as an attachment member for fixing to the side member. However, it penetrates the one end plate of the casing 1 and the partition plate inside the casing 1 and is fixed by welding or the like. And the front-end | tip part of the attachment pipe 5 was fastened by the insertion part 9 of one muffler hanger 7 fixed to the side member side, and the muffler 3 was attached to the side member.

図６に示すようにマフラーハンガー７の差込み部９は、取付パイプ５が挿入可能な断面Ｃ字状に形成され、差込み部９に取付パイプ５の先端部を挿入して、その自由端側の対峙する締付けフランジ１１に設けたボルト孔１３に取付ボルトを螺着することで、差込み部９に取付パイプ５が締付け固定できるようになっている。
そして、近年、エンジン出力の向上に伴って増大する排気騒音に対応すべく、マフラーの容量を十分に確保するため、マフラーが更に大型化，重量化される傾向にある。 As shown in FIG. 6, the insertion portion 9 of the muffler hanger 7 is formed in a C-shaped cross section into which the attachment pipe 5 can be inserted, and the distal end portion of the attachment pipe 5 is inserted into the insertion portion 9 so that the free end side thereof is inserted. The attachment pipe 5 can be fastened and fixed to the insertion portion 9 by screwing the attachment bolt into the bolt hole 13 provided in the opposing fastening flange 11.
In recent years, the muffler tends to be further increased in size and weight in order to sufficiently secure the capacity of the muffler in order to cope with the exhaust noise that increases as the engine output increases.

そこで、マフラーの重量増加に伴い、図７に示すように昨今では、前記取付パイプ５に代え、略方形体状に形成されたケーシング１５の上面の左右に、１枚の取付プレート１７を介して２本の断面円形形状の取付パイプ１９，２１を並列に取り付けると共に、取付パイプ１９，２１に対応して前記差込み部９と同一構造からなる２つの差込み部２３，２５が一体成形されたマフラーハンガー２７を用いて、マフラー２９をサイドメンバに固定している。
特開２００３−２６９１２９号公報 Therefore, with the increase in the weight of the muffler, as shown in FIG. 7, nowadays, instead of the mounting pipe 5, a single mounting plate 17 is provided on the left and right sides of the upper surface of the casing 15 formed in a substantially rectangular shape. A muffler hanger in which two attachment pipes 19 and 21 having a circular cross section are attached in parallel, and two insertion parts 23 and 25 having the same structure as the insertion part 9 are integrally formed corresponding to the attachment pipes 19 and 21. 27, the muffler 29 is fixed to the side member.
JP 2003-269129 A

しかし乍ら、斯様に２本の取付パイプ１９，２１をケーシング１５の上面に取り付けた従来構造にあっては、取付パイプ１９，２１間の寸法精度にばらつきが生じることがあり、斯様に寸法精度にばらつきが発生してしまうと、マフラーハンガー２７の差込み部２３，２５と取付パイプ１９，２１とが一致せずにマフラーハンガー２７への組み付けができなくなってしまう不具合があった。 However, in the conventional structure in which the two attachment pipes 19 and 21 are attached to the upper surface of the casing 15 as described above, the dimensional accuracy between the attachment pipes 19 and 21 may vary. If the dimensional accuracy varies, there is a problem in that the insertion portions 23 and 25 of the muffler hanger 27 and the attachment pipes 19 and 21 do not coincide with each other and the muffler hanger 27 cannot be assembled.

そして、取付パイプ１９，２１間の寸法精度は、生産性（コスト）を考慮するとあまり精度を上げられないのが実情である。
本発明は斯かる実情に鑑み案出されたもので、マフラー側に２本の取付パイプを取り付け、当該取付パイプとマフラーハンガーとでマフラーをシャシフレームに取り付けるに当たり、２本の取付パイプ間の寸法精度のばらつきを吸収することのできるマフラーハンガーを提供することを目的とする。 And the dimensional accuracy between the attachment pipes 19 and 21 is actually not so high considering productivity (cost).
The present invention has been devised in view of such circumstances, and when mounting two mounting pipes on the muffler side and mounting the muffler to the chassis frame with the mounting pipe and the muffler hanger, the dimension between the two mounting pipes An object of the present invention is to provide a muffler hanger that can absorb variations in accuracy.

斯かる目的を達成するため、請求項１に係る発明は、マフラーをシャシフレームに取り付けるマフラーハンガーであって、マフラー側に取り付く２本の断面円形形状の取付パイプを差し込む２つの差込み部が設けられたマフラーハンガーに於て、前記差込み部の一方を、マフラーハンガー本体に一体成形されたパイプ受け部と、前記パイプ受け部と別体に形成されてこれにボルト締めされる締付体とで構成し、前記パイプ受け部は、前記取付パイプを支持する断面長円状の支持部と、当該支持部を挟んで平面視円形形状のボルト孔が形成され、前記締付体は、前記取付パイプの外形形状に沿った断面真円状の支持部と、前記ボルト孔に対応して平面視長孔形状のボルト孔が形成されていることを特徴とする。 In order to achieve such an object, the invention according to claim 1 is a muffler hanger for attaching a muffler to a chassis frame, and is provided with two insertion portions for inserting two attachment pipes having a circular cross section attached to the muffler side. was at a muffler hanger, composed of one of the spigot, and a pipe receiving portion integrally formed on the muffler hanger body, fastening body and which is the pipe receiving portion and which bolting is formed separately The pipe receiving part is formed with a support part having an oval cross section for supporting the attachment pipe, and a bolt hole having a circular shape in plan view across the support part, and the fastening body is formed of the attachment pipe. A support portion having a perfectly circular cross section along the outer shape and a bolt hole having a long hole shape in plan view corresponding to the bolt hole are formed .

請求項１に係る発明によれば、一方の差込み部を、マフラーハンガー本体に一体成形されたパイプ受け部と、これにボルト締めされる締付体との分割構造としたので、マフラー側に取り付く取付パイプに寸法精度のばらつきがあっても、斯かるばらつきを吸収してマフラーを容易にシャシフレームに取り付けることができる利点を有する。
そして、パイプ受け部の支持部を断面長円状に形成すると共に、締付体の支持部を取付パイプの外形形状に沿った断面真円状としているため、取付パイプ間の寸法精度にばらつきが発生している場合に、一方の取付パイプに沿って締付体をずらして取付パイプの外周に支持部を当接させることができ、而も、締付体のボルト孔が平面視長孔形状に形成されているため、斯様に取付パイプに沿って締付体をずらしても、取付ボルトをボルト孔に挿通させて締め付けることで、取付パイプをパイプ受け部の支持部と締付体の支持部とで強固に挟持することができる利点を有する。 According to the first aspect of the present invention, since one of the insertion parts has a divided structure of a pipe receiving part integrally formed on the muffler hanger body and a tightening body bolted to the pipe receiving part, it is attached to the muffler side. Even if there is a variation in dimensional accuracy in the mounting pipe, there is an advantage that the muffler can be easily attached to the chassis frame by absorbing such variation.
And, the to form a support of the pipes receiving portion in the cross-sectional oval shape, since the cross section circular shape along the support portion of the clamping member to the outer shape of the mounting pipe, the dimensional accuracy between the mounting pipe When variation occurs, the fastening body can be shifted along one mounting pipe to bring the support part into contact with the outer periphery of the mounting pipe. Because it is formed in a hole shape, even if the tightening body is displaced along the mounting pipe in this way, the mounting bolt is inserted into the bolt hole and tightened, so that the mounting pipe is tightened with the support portion of the pipe receiving portion. It has the advantage that it can be firmly held between the body support portions.

以下、本発明の実施形態を図面に基づいて詳細に説明する。
尚、図７に示す従来例と同一のものは同一符号を付してそれらの構造説明は省略する。
図１は請求項１の一実施形態に係るマフラーハンガーを用いたマフラーの取付構造を示し、図中、３１はシャシフレームのサイドメンバに取り付くマフラーハンガーで、当該マフラーハンガー３１は、後述する差込み部３３やパイプ受け部３５が一体成形されたマフラーハンガー本体３７と、当該パイプ受け部３５にボルト締めされる締付体３９とで構成されている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
7 that are the same as those in the conventional example shown in FIG.
Figure 1 shows a mounting structure of the muffler with the muffler hanger according to an embodiment of claim 1, in the figure 31 is a muffler hanger attaches to the side members of the chassis frame, the muffler hanger 31 described later spigot 33 and a muffler hanger body 37 integrally formed with a pipe receiving portion 35 and a tightening body 39 that is bolted to the pipe receiving portion 35.

図２及び図３に示すようにマフラーハンガー本体３７は、所定形状の基台４１にボルト孔４３を有する肉厚なボス４５，４７，４９，５１が上下左右に４カ所設けられており、当該ボルト孔４３を介してマフラーハンガー本体３７が取付ボルトでサイドメンバにボルト締めされる。
また、基台４１の正面視左側上部には、図７の差込み部２３と同様、マフラー２９側に取り付けた取付パイプ１９が挿入可能な断面Ｃ字状の差込み部３３が一体に設けられており、当該差込み部３３に取付パイプ１９の先端部を挿入して、その自由端側の対峙する締付けフランジ５５に設けたボルト孔５７に取付ボルトを螺着すれば、差込み部３３に取付パイプ１９が締付け固定できるようになっている。 As shown in FIGS. 2 and 3, the muffler hanger body 37 is provided with four bosses 45, 47, 49, 51 having a bolt hole 43 on a base 41 having a predetermined shape on the top, bottom, left, and right. The muffler hanger body 37 is bolted to the side member with a mounting bolt through the bolt hole 43.
Further, similarly to the insertion portion 23 of FIG. 7, an insertion portion 33 having a C-shaped cross section into which the attachment pipe 19 attached to the muffler 29 side can be inserted is integrally provided on the upper left side of the base 41 in front view. If the tip of the attachment pipe 19 is inserted into the insertion portion 33 and the attachment bolt is screwed into the bolt hole 57 provided in the clamping flange 55 facing the free end, the attachment pipe 19 is attached to the insertion portion 33. It can be tightened and fixed.

尚、図示するように差込み部３３の内周には、取付パイプ１９の締付けを強化する目的で、内方へ突出する凸部５８が取付パイプ１９の軸方向に沿って複数突設されている。
そして、基台４１の正面視右側上部に、本実施形態の特徴たる分割構造の差込み部５９が設けられている。
差込み部５９は、基台４１側に一体成形されたパイプ受け部３５と、当該パイプ受け部３５にボルト締めされる締付体３９とからなり、図２及び図４に示すようにパイプ受け部３５は、断面長円状に形成された支持部６１と、当該支持部６１の左右に設けられた締付けフランジ６３とで構成され、締付けフランジ６３には、夫々、平面視円形形状のボルト孔６５が２個宛設けられている。そして、支持部６１と前記差込み部３３は、同方向へ並列した構造となっている。 As shown in the drawing, a plurality of convex portions 58 projecting inward along the axial direction of the mounting pipe 19 are provided on the inner periphery of the insertion portion 33 for the purpose of strengthening the tightening of the mounting pipe 19. .
And the insertion part 59 of the division structure which is the characteristics of this embodiment is provided in the upper right part of the base 41 in front view.
The insertion portion 59 includes a pipe receiving portion 35 integrally formed on the base 41 side, and a fastening body 39 that is bolted to the pipe receiving portion 35. As shown in FIGS. 2 and 4, the pipe receiving portion Reference numeral 35 denotes a support portion 61 formed in an oval cross section, and fastening flanges 63 provided on the left and right sides of the support portion 61, and the fastening flange 63 has a circular bolt hole 65 in a plan view. Are addressed to two. And the support part 61 and the said insertion part 33 have a structure juxtaposed in the same direction.

一方、図２乃至図５に示すように締付体３９は、取付パイプ２１の外形形状に沿って形成された断面真円状の支持部６７と、前記締付けフランジ６３と連結可能に支持部６７の左右に設けられた締付けフランジ６９とで構成されている。そして、締付けフランジ６９には、前記ボルト孔６５に対応して平面視長孔形状のボルト孔７１が、同一方向（締付体３９の左右方向）へ２個宛設けられている。 On the other hand, clamping members 39 as shown in FIGS. 2 to 5, a cross-sectional perfect circle-shaped support portion 67 formed along the outer shape of the attachment pipe 21, to be connected to the fastening flange 63 supporting portion 67 And fastening flanges 69 provided on the left and right sides. Two bolt holes 71 having a long hole shape in plan view corresponding to the bolt holes 65 are provided in the tightening flange 69 in the same direction (left and right direction of the tightening body 39).

更に、パイプ受け部３５の支持部６１の内周と、締付体３９の支持部６７の内周にも、夫々、取付パイプ２１の締付けを強化する目的で、内方へ突出する凸部７３，７５がマフラー２９の前後方向へ複数突設されている。
そして、図２及び図３に示すように前記ボス４５，４７，４９，５１と差込み部３３，パイプ受け部３５は、基台４１に立設したリブ７７で連結された構造となっている。 Further, the inner periphery of the support portion 61 of the pipe receiving portion 35 and the inner periphery of the support portion 67 of the tightening body 39 are each protruded inwardly for the purpose of strengthening the fastening of the mounting pipe 21. , 75 are projected in the front-rear direction of the muffler 29.
As shown in FIGS. 2 and 3, the bosses 45, 47, 49, 51, the insertion part 33, and the pipe receiving part 35 are connected by a rib 77 erected on the base 41.

その他、図２中、７９はボルト孔７１に挿通させてボルト孔６５に螺着した取付ボルトである。
本実施形態に係るマフラーハンガー３１はこのように構成されているから、当該マフラーハンガー３１を用いてマフラー２９をシャシフレームに取り付けるには、ボス４５，４７，４９，５１のボルト孔４３を介して、先ず、シャシフレームの所定位置にマフラーハンガー３１をボルト締めする。 In addition, in FIG. 2, reference numeral 79 denotes a mounting bolt inserted through the bolt hole 71 and screwed into the bolt hole 65.
Since the muffler hanger 31 according to the present embodiment is configured as described above, in order to attach the muffler 29 to the chassis frame using the muffler hanger 31, the bolt holes 43 of the bosses 45, 47, 49, 51 are used. First, the muffler hanger 31 is bolted to a predetermined position of the chassis frame.

この際、締付けフランジ５５のボルト孔５７に螺着する取付ボルトを緩めて、取付パイプ１９が挿入可能に差込み部３３を拡開しておくと共に、取付ボルト７９を緩めて、差込み部５９の締付体３９による締付けを解除しておく。
この後、取付パイプ１９の先端を差込み部３３内に挿入し乍ら、他方の取付パイプ２１の先端を差込み部５９内、即ち、パイプ受け部３５の支持部６１と締付体３９の支持部６７の間に挿入して、差込み部３３，５９側の取付ボルト７９を夫々締め付ければよく、既述したように差込み部５９は、パイプ受け部３５と締付体３９との分割構造とされて、パイプ受け部３５の支持部６１が断面長円状に形成されると共に、締付体３９の支持部６７が取付パイプ２１の外形形状に沿った断面真円状とされているため、取付パイプ１９，２１間の寸法精度にばらつきが発生している場合には、図５に示すように取付パイプ２１に沿って締付体３９を矢印Ａ，Ｂ方向へ移動させたり矢印Ｃ，Ｄ方向へ回転させ、また、取付パイプ１９，２１の中心軸が恰も交差する如くずれているような場合には、取付パイプ２１に沿って締付体３９をずらして取付パイプ２１の外周に支持部６７を当接させればよい。 At this time, the mounting bolt to be screwed into the bolt hole 57 of the tightening flange 55 is loosened to widen the insertion portion 33 so that the mounting pipe 19 can be inserted, and the mounting bolt 79 is loosened to tighten the insertion portion 59. The tightening by the appendage 39 is released.
Thereafter, the tip of the attachment pipe 19 is inserted into the insertion portion 33, and the tip of the other attachment pipe 21 is inserted into the insertion portion 59, that is, the support portion 61 of the pipe receiving portion 35 and the support portion of the fastening body 39. 67, and the fastening bolts 79 on the side of the insertion portions 33 and 59 may be tightened. As described above, the insertion portion 59 has a divided structure of the pipe receiving portion 35 and the fastening body 39. In addition, the support portion 61 of the pipe receiving portion 35 is formed in an oval cross section, and the support portion 67 of the tightening body 39 is formed in a perfect circle shape in cross section along the outer shape of the attachment pipe 21. When the dimensional accuracy between the pipes 19 and 21 varies, as shown in FIG. 5, the tightening body 39 is moved in the directions of arrows A and B along the mounting pipe 21 or in the directions of arrows C and D. And the central axis of the mounting pipes 19 and 21 is Even if such are shifted as to intersect, it is only necessary to contact the support portion 67 on the outer periphery of the mounting pipe 21 by shifting the clamping member 39 along the attachment pipe 21.

そして、既述したように締付体３９のボルト孔７１は平面視長孔形状に形成されているため、斯様に取付パイプ２１に沿って締付体３９をずらしても、取付ボルト７９をボルト孔７１に挿通させてボルト孔６５に螺着させることにより、取付パイプ２１がパイプ受け部３５の支持部６１と締付体３９の支持部６７とで強固に挟持されて、マフラー２９がマフラーハンガー３１を介してシャシフレームに取り付くこととなる。 As described above, since the bolt hole 71 of the tightening body 39 is formed in the shape of a long hole in plan view, the mounting bolt 79 can be moved even if the tightening body 39 is shifted along the mounting pipe 21 in this way. By inserting the bolt 21 into the bolt hole 71 and screwing it into the bolt hole 65, the attachment pipe 21 is firmly held between the support 61 of the pipe receiver 35 and the support 67 of the tightening body 39, and the muffler 29 is muffler. It will be attached to the chassis frame via the hanger 31.

このように本実施形態に係るマフラーハンガー３１は、一方の差込み部５９を、マフラーハンガー本体３７に取り付くパイプ受け部３５と、これにボルト締めされる締付体３９との分割構造としたので、マフラー２９側に取り付く取付パイプ１９，２１に寸法精度のばらつきがあっても、斯かるばらつきを吸収してマフラー２９を容易にシャシフレームに取り付けることができる利点を有する。 As described above, the muffler hanger 31 according to the present embodiment has one insertion portion 59 divided into a pipe receiving portion 35 that is attached to the muffler hanger main body 37 and a fastening body 39 that is bolted thereto. Even if there is a variation in dimensional accuracy in the mounting pipes 19 and 21 attached to the muffler 29 side, there is an advantage that the muffler 29 can be easily attached to the chassis frame by absorbing such variation.

また、本実施形態は、パイプ受け部３５の支持部６１を断面長円状に形成すると共に、締付体３９の支持部６７を取付パイプ２１の外形形状に沿った断面真円状としているため、取付パイプ１９，２１間の寸法精度にばらつきが発生している場合に、取付パイプ２１に沿って締付体３９をずらして取付パイプ２１の外周に支持部６７を当接させることができ、而も、締付体３９のボルト孔７１が平面視長孔形状に形成されているため、斯様に取付パイプ２１に沿って締付体３９をずらしても、取付ボルト７９をボルト孔７１に挿通させてボルト孔６５に螺着させることで、取付パイプ２１をパイプ受け部３５の支持部６１と締付体３９の支持部６７とで強固に挟持することができる利点を有する。 Further, in the present embodiment, the support portion 61 of the pipe receiving portion 35 is formed in an elliptical cross section, and the support portion 67 of the fastening body 39 is formed in a perfect circular shape along the outer shape of the attachment pipe 21. When the dimensional accuracy between the mounting pipes 19 and 21 varies, the fastening body 39 can be shifted along the mounting pipe 21 to bring the support portion 67 into contact with the outer periphery of the mounting pipe 21. In addition, since the bolt hole 71 of the tightening body 39 is formed in the shape of a long hole in a plan view, even if the tightening body 39 is shifted along the mounting pipe 21 in this way, the mounting bolt 79 is moved to the bolt hole 71. By inserting and screwing the bolt into the bolt hole 65, there is an advantage that the attachment pipe 21 can be firmly held between the support portion 61 of the pipe receiving portion 35 and the support portion 67 of the tightening body 39.

また、本実施形態とは別に、パイプ受け部と締付体を締め付ける際に、ナット等を使用する構造にしてもよい。 In addition to this embodiment, a nut or the like may be used when the pipe receiving portion and the tightening body are tightened.

請求項１の一実施形態に係るマフラーハンガーを用いたマフラーの取付構造の全体斜視図である。It is a whole perspective view of the attachment structure of the muffler using the muffler hanger which concerns on one Embodiment of Claim 1 . マフラーハンガーの全体斜視図である。It is the whole muffler hanger perspective view. マフラーハンガーの正面図である。It is a front view of a muffler hanger. パイプ受け部と締付体からなる差込み部の要部拡大正面図である。It is a principal part enlarged front view of the insertion part which consists of a pipe receiving part and a fastening body. 締付体の拡大平面図である。It is an enlarged plan view of a fastening body. 従来のマフラーハンガーを用いたマフラーの取付構造の斜視図である。It is a perspective view of the attachment structure of the muffler using the conventional muffler hanger. 従来の他のマフラーハンガーを用いたマフラーの取付構造の斜視図である。It is a perspective view of the attachment structure of the muffler using the other conventional muffler hanger.

Explanation of symbols

１５ケーシング
１７取付プレート
１９，２１取付パイプ
２９マフラー
３１マフラーハンガー
３３，５９差込み部
３５パイプ受け部
３７マフラーハンガー本体
３９締付体
４１基台
４３，５７，６５，７１ボルト孔
４５，４７，４９，５１ボス
５５，６３，６９締付けフランジ
５８，７３，７５凸部
６１，６７支持部
７７リブ
７９取付ボルト
15 Casing 17 Mounting plate 19, 21 Mounting pipe 29 Muffler 31 Muffler hanger 33, 59 Insertion part 35 Pipe receiving part 37 Muffler hanger body 39 Fastening body 41 Base 43, 57, 65, 71 Bolt holes 45, 47, 49, 51 Boss 55, 63, 69 Fastening flange 58, 73, 75 Protruding part 61, 67 Support part 77 Rib 79 Mounting bolt

Claims

A muffler hanger that attaches a muffler to a chassis frame, and is provided with two insertion parts for inserting two mounting pipes having a circular cross section to be attached to the muffler side.
One of the insertion parts, a pipe receiving part integrally formed on the muffler hanger body,
The pipe receiving part is formed separately from the tightening body that is bolted to this,
The pipe receiving part is formed with a support part having an oval cross section for supporting the attachment pipe, and a bolt hole having a circular shape in plan view across the support part,
A muffler characterized in that the fastening body is formed with a support portion having a perfect circular cross section along the outer shape of the mounting pipe and a bolt hole having a long hole shape in plan view corresponding to the bolt hole. Hanger.