JP2008019882A - Joint structure of pipe - Google Patents

Joint structure of pipe Download PDF

Info

Publication number
JP2008019882A
JP2008019882A JP2006189524A JP2006189524A JP2008019882A JP 2008019882 A JP2008019882 A JP 2008019882A JP 2006189524 A JP2006189524 A JP 2006189524A JP 2006189524 A JP2006189524 A JP 2006189524A JP 2008019882 A JP2008019882 A JP 2008019882A
Authority
JP
Japan
Prior art keywords
pipe
chevron
flare
bead
shaped
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2006189524A
Other languages
Japanese (ja)
Inventor
Kunikazu Ban
邦和 伴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Corp
Original Assignee
Calsonic Kansei Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Calsonic Kansei Corp filed Critical Calsonic Kansei Corp
Priority to JP2006189524A priority Critical patent/JP2008019882A/en
Publication of JP2008019882A publication Critical patent/JP2008019882A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Joints With Pressure Members (AREA)
  • Joints With Sleeves (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint structure of a pipe which can enhance an axial tensile strength while maintaining a product reliability. <P>SOLUTION: In a joint structure of a pipe, a first pipe 1 which keeps a chevron bead 11 expanding diametrically outward located near an end thereof is inserted into a second pipe 2 in which a flare 22 expanding diametrically outward and abutting on an end side tapered surface 11b of the chevron bead 11, fastened from outside with a C-shaped clamp 4 having an angled section which is equipped with a fastening bolt-nut 43 by forcing the end side tapered surface 11b of the chevron bead 11 abutting on the flare 22, and connected with the second pipe 2. A flat part 11a is formed on the outer peripheral edge of the chevron bead 11. A straight pipe part 23 abutting on the flat part 11a of the chevron bead 11 is formed at a tip edge of the flare 22. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、パイプの接続部構造に関し、特に、車両用排気系を構成するパイプの接続に最適なパイプの接続部構造に関する。   The present invention relates to a pipe connection structure, and more particularly to a pipe connection structure that is optimal for connection of pipes constituting an exhaust system for a vehicle.

従来、パイプの接続部構造としては、端部付近に径方向外側に膨出する山形のビードが形成された第１のパイプを、端部に径方向外側に拡開して山形のビードの端部側テーパ面に当接するフレアが形成された第２のパイプに差し込み、山形のビードの端部側テーパ面にフレアを当接させて、外側から締結ボルトを備えた断面山形のＣ型クランプで締め付けて第１のパイプと第２のパイプを接続するようにした構造のものが知られている。   Conventionally, as a pipe connecting portion structure, a first pipe in which a mountain-shaped bead bulging radially outward is formed in the vicinity of the end, and the end of the mountain-shaped bead is expanded to the end radially outward. A C-shaped clamp with a cross-sectional chevron with a fastening bolt from the outside by inserting it into the second pipe formed with a flare that abuts against the taper surface on the part side, abutting the flare against the taper surface on the end part side of the chevron bead A structure in which a first pipe and a second pipe are connected by fastening is known.

そして、従来例１（例えば、特許文献１参照。）では、フレアの先端を山形のビードの端部側テーパ面側へ折り曲げ、該折り曲げ部で端面を支持する状態でガスケットがフレアとテーパ面との間に介装されている。   In Conventional Example 1 (for example, refer to Patent Document 1), the tip of the flare is bent toward the end side taper surface side of the chevron bead, and the gasket is configured so that the end surface is supported by the bent portion. It is intervened between.

また、従来例２（例えば、特許文献２参照。）は、フレアの先端を内向きに折り返すことによって、シール性を高めるようにしている。   Further, in the conventional example 2 (for example, refer to Patent Document 2), the sealing performance is improved by folding the tip of the flare inward.

ところが、上述の従来例１、２にあっては、テーパ状のフレアが山形ビードのテーパ面とＣ型クランプのテーパ面との間に挟持された構造であるため、第１のパイプと第２のパイプを引き離す方向に大きな力が加わると、テーパ面に沿ってフレアが引き抜かれる虞があるという問題があった。   However, in the above-described conventional examples 1 and 2, since the tapered flare is sandwiched between the tapered surface of the chevron bead and the tapered surface of the C-shaped clamp, the first pipe and the second pipe When a large force is applied in the direction of separating the pipes, there is a problem that the flare may be pulled out along the tapered surface.

そこで、フレアの先端部に水平部が形成され、Ｃ型クランプによる締め付け固定する際に、この水平部を第１のパイプの山形ビードとＣクランプの山形断面との間で挟持してフレアと水平部を山形に変形させるようにした構造のものがある（例えば、特許文献３参照。）・・・従来例３。
特許第３０７７２８７号公報 特開平９−１８９３８６号公報 特許第２５１２５３５号公報 Therefore, a horizontal portion is formed at the tip of the flare, and when the C-shaped clamp is fastened and fixed, the horizontal portion is sandwiched between the chevron bead of the first pipe and the chevron cross section of the C clamp, and the flare and the horizontal There is a structure in which the portion is deformed into a mountain shape (for example, see Patent Document 3). Conventional example 3.
Japanese Patent No. 3077287 JP-A-9-189386 Japanese Patent No. 2512535

しかしながら、従来例３のパイプの接続部構造にあっては、Ｃ型クランプの締め付けによって変形させるのは、フレアと水平部の組み付け寸法精度にバラツキが生じ易く、再現性が低いため、製品信頼性が低いという問題があった。   However, in the pipe connection structure of the conventional example 3, the deformation by tightening the C-type clamp is likely to cause variations in the assembly dimension accuracy between the flare and the horizontal part, and the reproducibility is low. There was a problem of low.

本発明の解決しようとする課題は、製品信頼性を維持しつつ、軸方向の引っ張り強度を高めることができるパイプの接続部構造を提供することにある。   The problem to be solved by the present invention is to provide a pipe connection structure that can increase the tensile strength in the axial direction while maintaining product reliability.

上記課題を解決するため請求項１記載のパイプの接続部構造は、端部付近に径方向外側に膨出する山形のビードが形成された第１のパイプを、端部に径方向外側に拡開して山形のビードの端部側テーパ面に当接するフレアが形成された第２のパイプに差し込み、山形のビードの端部側テーパ面にフレアを当接させて、外側から締結ボルトを備えた断面山形のクランプで締め付けて第１のパイプと第２のパイプを接続するようにしたパイプの接続部構造であって、前記山形のビードの外周縁部に平坦部が形成され、前記フレアの先端縁部には前記山形のビードの平坦部に当接する直管部が形成されていることを特徴とする手段とした。   In order to solve the above-mentioned problems, the pipe connecting portion structure according to claim 1 is characterized in that the first pipe formed with a mountain-shaped bead bulging radially outward near the end is expanded radially outward at the end. Opened and inserted into a second pipe formed with a flare that contacts the end side taper surface of the chevron-shaped bead. A pipe connecting portion structure in which the first pipe and the second pipe are connected by clamping with a mountain-shaped clamp, wherein a flat portion is formed on the outer peripheral edge of the mountain-shaped bead, A straight pipe portion that is in contact with the flat portion of the chevron-shaped bead is formed at the tip edge portion.

本発明のパイプの接続部構造では、上述のように、山形のビードの外周縁部に平坦部が形成され、フレアの先端縁部には山形のビードの平坦部に当接する直管部が形成されている構成としたことで、第２のパイプにおける直管部の平坦部分が第１のパイプにおける山形ビードの外周縁部に形成された平坦部に当接係止された状態になるため、フレアに対し折曲形成された直管部の剛性により、かつ、平坦部と直管部の摺動抵抗により、第１のパイプと第２のパイプを引き離す方向に大きな力が加わった場合でも、軸方向の引っ張り強度を高めることができるようになる。   In the pipe connecting portion structure of the present invention, as described above, a flat portion is formed at the outer peripheral edge portion of the chevron-shaped bead, and a straight pipe portion that is in contact with the flat portion of the chevron-shaped bead is formed at the leading edge of the flare. Since the flat portion of the straight pipe portion in the second pipe is in contact with and locked to the flat portion formed on the outer peripheral edge portion of the angle bead in the first pipe, Even when a large force is applied in the direction of separating the first pipe and the second pipe due to the rigidity of the straight pipe part bent with respect to the flare and the sliding resistance of the flat part and the straight pipe part, The tensile strength in the axial direction can be increased.

また、直管部はＣ型クランプの締め付けによって変形させるものではなく、第２のパイプの成形時に予め成形されるため、フレアと水平部の組み付け寸法精度にバラツキが生じ難く、これにより、再現性が高く製品の信頼性を維持することができるようになる。   In addition, the straight pipe part is not deformed by tightening the C-type clamp, but is formed in advance when the second pipe is formed, so that the assembly dimension accuracy between the flare and the horizontal part is less likely to vary, thereby enabling reproducibility. It will be possible to maintain high product reliability.

以下にこの発明の実施例を図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

この実施例のパイプの接続部構造は、請求項１および２に記載の発明に対応する。   The pipe connecting portion structure of this embodiment corresponds to the invention described in claims 1 and 2.

まず、この実施例のパイプの接続部構造を図面に基づいて説明する。   First, the pipe connection structure of this embodiment will be described with reference to the drawings.

図１はこの実施例のパイプの接続部構造を示す接続状態の正面図、図２は図１のＡ−Ａ線における拡大半断面図である。   FIG. 1 is a front view of a connection state showing a pipe connection structure of this embodiment, and FIG. 2 is an enlarged half sectional view taken along line AA of FIG.

このパイプの接続部構造は、第１のパイプ１と、第２のパイプ２と、ガスケット３と、Ｃ型クランプ（クランプ）４と、を備えている。   The pipe connecting portion structure includes a first pipe 1, a second pipe 2, a gasket 3, and a C-type clamp (clamp) 4.

さらに詳述すると、上記第１のパイプ１は、図２に示すように、その端部付近に径方向外側に膨出する山形のビード１１が形成され、この山型ビート１１の外周縁部には第１のパイプ１の軸線方向と平行な平坦部１１ａが形成されている。   More specifically, as shown in FIG. 2, the first pipe 1 has a chevron-shaped bead 11 that bulges outward in the radial direction in the vicinity of its end, and is formed on the outer peripheral edge of the chevron beat 11. Is formed with a flat portion 11 a parallel to the axial direction of the first pipe 1.

上記第２のパイプ２は、その端部側に第１のパイプ１における山形のビード１１より先端のパイプ先端部分１ａの外径より少し大径の大径部２１が形成されていて、この大径部２１とパイプ先端部分１ａとの間にガスケット３が介装されことにより、第１のパイプ１と第２のパイプ２との接続部のシールが確実に行われるようになっている。   The second pipe 2 is formed with a large diameter portion 21 slightly larger than the outer diameter of the pipe tip portion 1a at the tip of the first pipe 1 than the angled bead 11 in the first pipe 1. The gasket 3 is interposed between the diameter portion 21 and the pipe tip portion 1a, so that the connection portion between the first pipe 1 and the second pipe 2 is reliably sealed.

また、第２のパイプ２における大径部２１の端部には、径方向外側に拡開して第１のパイプ１における山形ビード１１の端部側テーパ面１１ｂに当接するフレア２２が形成されると共に、このフレア２２の先端部には山形のビード１１の平坦部１１ａに当接する大径の直管部２３が形成されている。   Further, a flare 22 is formed at the end of the large-diameter portion 21 in the second pipe 2 so as to expand outward in the radial direction and contact the end-side tapered surface 11b of the chevron bead 11 in the first pipe 1. In addition, a large-diameter straight pipe portion 23 that abuts against the flat portion 11 a of the mountain-shaped bead 11 is formed at the tip of the flare 22.

上記Ｃ型クランプ４は、図１、２に示すように、その本体部４１が一部切欠の略円形に形成され、該切欠された両端部には外向き略平行に延設された締結フランジ４２、４２を備え、この両締結フランジ４２、４２を締結ボルト・ナット４３で締結するようになっている。   As shown in FIGS. 1 and 2, the C-shaped clamp 4 has a body portion 41 formed in a substantially circular shape with a part of the cutout, and a fastening flange extending outwardly and substantially parallel to both ends of the cutout. 42 and 42, and both fastening flanges 42 and 42 are fastened by fastening bolts and nuts 43.

また、本体部４１は、その中央部が径方向外側に膨出する断面山形のビード４１ａが形成されている。   Further, the body portion 41 is formed with a bead 41a having a mountain-shaped cross section whose central portion bulges outward in the radial direction.

次に、この実施例の作用を説明する。   Next, the operation of this embodiment will be described.

この実施例のパイプの接続部構造では上述のように構成されるため、まず、第１のパイプ１におけるパイプ先端部分１ａの外周にガスケット３を装着させた状態で第２のパイプ２における大径部２１に差し込むことにより、この大径部２１とパイプ先端部分１ａとの間にガスケット３が圧入介装された状態になると共に、第２のパイプ２におけるフレア２２と直管部２３の内面が、第１のパイプ１における山形ビード１１の端部側テーパ面１１ｂと平坦部１１ａに当接した状態になる。   Since the pipe connecting portion structure of this embodiment is configured as described above, first, the large diameter of the second pipe 2 in a state where the gasket 3 is attached to the outer periphery of the pipe tip portion 1a of the first pipe 1. By inserting into the portion 21, the gasket 3 is press-fitted between the large diameter portion 21 and the pipe tip portion 1a, and the flare 22 and the inner surface of the straight pipe portion 23 in the second pipe 2 are The first pipe 1 is in contact with the end-side tapered surface 11b of the chevron bead 11 and the flat portion 11a.

そこで、第１のパイプ１と第２のパイプ２の接続部外周にＣ型クランプの本体部４１を装着し、両締結フランジ４２、４２を締結ボルト・ナット４３で締結することにより、山形ビード４１ａの両テーパ面が第１のパイプ１における山形ビード１１のテーパ面１１ｃと第２のパイプ２におけるフレア２２に当接し、軸心方向に締め付けられるため、第２のパイプ２におけるフレア２２と直管部２３の内面が、第１のパイプ１における山形ビード１１の端部側テーパ面１１ｂと平坦部１１ａに強く圧接された状態になる。   Therefore, a C-shaped clamp main body 41 is mounted on the outer periphery of the connection portion between the first pipe 1 and the second pipe 2 and both fastening flanges 42 and 42 are fastened by fastening bolts and nuts 43 to thereby form an angle bead 41a. Since both the taper surfaces abut on the taper surface 11c of the chevron bead 11 in the first pipe 1 and the flare 22 in the second pipe 2, and are tightened in the axial direction, the flare 22 in the second pipe 2 and the straight pipe The inner surface of the portion 23 is in a state of being in strong pressure contact with the end-side tapered surface 11b of the chevron bead 11 in the first pipe 1 and the flat portion 11a.

次に、この実施例の効果を説明する。   Next, the effect of this embodiment will be described.

この実施例のパイプの接続部構造では、上述のように、山形のビード１１の外周縁部に平坦部１１ａが形成され、フレア２２の先端縁部には山形のビード１１の平坦部１１ａに当接する直管部２３が形成されている構成としたことで、第２のパイプ２における直管部２３の平坦部分が第１のパイプ１における山形ビード１１の外周縁部に形成された平坦部１１ａに当接係止された状態になるため、フレア２２に対し折曲形成された直管部２３の剛性により、かつ、平坦部１１ａと直管部２３の摺動抵抗により、第１のパイプ１と第２のパイプ２を引き離す方向に大きな力が加わった場合でも、軸方向の引っ張り強度を高めることができるようになる。   In the pipe connecting portion structure of this embodiment, as described above, the flat portion 11a is formed on the outer peripheral edge portion of the chevron-shaped bead 11, and the tip edge of the flare 22 is in contact with the flat portion 11a of the chevron-shaped bead 11. By adopting a configuration in which the straight pipe portion 23 that is in contact is formed, the flat portion of the straight pipe portion 23 in the second pipe 2 is formed on the outer peripheral edge portion of the chevron bead 11 in the first pipe 1. Since the straight pipe portion 23 is bent with respect to the flare 22 and the sliding resistance between the flat portion 11a and the straight pipe portion 23, the first pipe 1 is Even when a large force is applied in the direction in which the second pipe 2 is separated, the tensile strength in the axial direction can be increased.

また、直管部２３はＣ型クランプ４の締め付けによって変形させるものではなく、第２のパイプ２の成形時に予め成形されるため、フレアと水平部の組み付け寸法精度にバラツキが生じ難く、これにより、再現性が高く製品の信頼性を維持することができるようになる。   Further, since the straight pipe portion 23 is not deformed by tightening the C-type clamp 4 and is formed in advance when the second pipe 2 is formed, it is difficult for the flare and the horizontal portion to be assembled with different dimensional accuracy. , The reproducibility is high and the reliability of the product can be maintained.

以上本実施例を説明してきたが、本発明は上述の実施例に限られるものではなく、本発明の要旨を逸脱しない範囲の設計変更等があっても、本発明に含まれる。   Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and design changes and the like within the scope not departing from the gist of the present invention are included in the present invention.

例えば、実施例では、クランプとしてＣ型クランプ４を例に採ったが、一対の半円状本体部の両端にそれぞれ備えた２箇所のフランジを２本の締結ボルト・ナットで締結するようにしてもよい。   For example, in the embodiment, the C-type clamp 4 is taken as an example of the clamp, but two flanges respectively provided at both ends of the pair of semicircular main body portions are fastened with two fastening bolts and nuts. Also good.

実施例のパイプの接続部構造を示す接続状態の正面図である。It is a front view of the connection state which shows the connection part structure of the pipe of an Example. 図２は図１のＡ−Ａ線における拡大半断面図である。FIG. 2 is an enlarged half sectional view taken along line AA of FIG.

符号の説明Explanation of symbols

１ 第１のパイプ
１ａ パイプ先端部分
１１ 山形ビード
１１ａ 平坦部
１１ｂ テーパ面
１１ｃ テーパ面
２ 第２のパイプ
２１ 大径部
２２ フレア
２３ 直管部
３ ガスケット
４ Ｃ型クランプ（クランプ）
４１ 本体部
４２ 締結フランジ
４３ 締結ボルト・ナット DESCRIPTION OF SYMBOLS 1 1st pipe 1a Pipe front-end | tip part 11 Yamagata bead 11a Flat part 11b Tapered surface 11c Tapered surface 2 2nd pipe 21 Large diameter part 22 Flare 23 Straight pipe part 3 Gasket 4 C type clamp (clamp)
41 Main Body 42 Fastening Flange 43 Fastening Bolt / Nut

Claims (2)

端部付近に径方向外側に膨出する山形のビードが形成された第１のパイプを、端部に径方向外側に拡開して山形のビードの端部側テーパ面に当接するフレアが形成された第２のパイプに差し込み、山形のビードの端部側テーパ面にフレアを当接させて、外側から締結ボルトを備えた断面山形のクランプで締め付けて第１のパイプと第２のパイプを接続するようにしたパイプの接続部構造であって、
前記山形のビードの外周縁部に平坦部が形成され、前記フレアの先端縁部には前記山形のビードの平坦部に当接する直管部が形成されていることを特徴とするパイプの接続部構造。 A flare is formed at the end of the first pipe having a chevron-shaped bead that bulges radially outward in the vicinity of the end so as to abut on the end-side tapered surface of the chevron-shaped bead. The first pipe and the second pipe are inserted into the second pipe, the flare is brought into contact with the end-side tapered surface of the chevron bead, and tightened with a chevron-shaped clamp having a fastening bolt from the outside. It is a pipe connection structure that is designed to be connected,
A connecting portion of a pipe, wherein a flat portion is formed on an outer peripheral edge portion of the chevron-shaped bead, and a straight pipe portion that is in contact with the flat portion of the chevron-shaped bead is formed at a tip edge portion of the flare. Construction. 請求項１に記載のパイプの接続部構造において、前記第２のパイプにおけるフレアの基部側に該第２のパイプの外径及び前記第１のパイプにおける山形のビードより先端のパイプ先端部分の外径より少し大径の大径部が形成され、該大径部と前記第１パイプのパイプ先端部分との間にガスケットが介装されていることを特徴とするパイプの接続部構造。   2. The pipe connection structure according to claim 1, wherein an outer diameter of the second pipe and a front end portion of the pipe that is more distal than the chevron-shaped bead than the first pipe are disposed on a flare base side of the second pipe. A pipe connecting portion structure, wherein a large-diameter portion slightly larger than the diameter is formed, and a gasket is interposed between the large-diameter portion and a pipe tip portion of the first pipe.
JP2006189524A 2006-07-10 2006-07-10 Joint structure of pipe Pending JP2008019882A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006189524A JP2008019882A (en) 2006-07-10 2006-07-10 Joint structure of pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006189524A JP2008019882A (en) 2006-07-10 2006-07-10 Joint structure of pipe

Publications (1)

Publication Number Publication Date
JP2008019882A true JP2008019882A (en) 2008-01-31

Family

ID=39075995

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006189524A Pending JP2008019882A (en) 2006-07-10 2006-07-10 Joint structure of pipe

Country Status (1)

Country Link
JP (1) JP2008019882A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017198267A (en) * 2016-04-26 2017-11-02 Ｊｆｅ継手株式会社 Pipe joint
CN112814773A (en) * 2019-11-15 2021-05-18 马自达汽车株式会社 Exhaust pipe structure of internal combustion engine-mounted vehicle and manufacturing method of internal combustion engine-mounted vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017198267A (en) * 2016-04-26 2017-11-02 Ｊｆｅ継手株式会社 Pipe joint
CN112814773A (en) * 2019-11-15 2021-05-18 马自达汽车株式会社 Exhaust pipe structure of internal combustion engine-mounted vehicle and manufacturing method of internal combustion engine-mounted vehicle

Similar Documents

Publication Publication Date Title
JP5722046B2 (en) Single bolt band clamp with center rib with gasket and pipe lap joint using the same
JP5259086B2 (en) Grooved pipe fastener with opposed flange abutment loops
TW201402980A (en) Housing type pipe joint
KR20080014734A (en) Pipe clamp assembly with v-ring insert
JP2013509554A (en) Pipe joint with seal pressing device
JP2008520912A (en) Pipe joint
JP2006233953A (en) Connection structure for vehicular exhaust pipe
JP2008019882A (en) Joint structure of pipe
JP5396093B2 (en) Fittings and packing rings
JP2008057550A (en) Connection part structure of pipe
JP2006064144A (en) Joint section structure of pipe
JP4758320B2 (en) Pipe connection structure
JP2013002515A (en) Hose fastening structure
JP4721971B2 (en) Detachment prevention fitting
JP4951329B2 (en) Hose fittings
JP5164216B2 (en) Connection structure
JP2008051192A (en) Connecting part structure for pipe
JP6498428B2 (en) Joint connection structure
JP2010139016A (en) Structure of pipe connection part
JP2007239847A (en) Pipe connecting structure
JP2006077895A (en) Pipe connection part structure
JP2004027986A (en) Joint structure for exhaust pipe
JP2006009914A (en) Insert pipe joint structure
JP4341954B2 (en) Pipe fitting and packing ring unit
JP2008196608A (en) Pipe fitting