JP3733750B2 - Duct joint structure - Google Patents

Duct joint structure Download PDF

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Publication number
JP3733750B2
JP3733750B2 JP19031598A JP19031598A JP3733750B2 JP 3733750 B2 JP3733750 B2 JP 3733750B2 JP 19031598 A JP19031598 A JP 19031598A JP 19031598 A JP19031598 A JP 19031598A JP 3733750 B2 JP3733750 B2 JP 3733750B2
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Japan
Prior art keywords
duct
joint structure
peripheral surface
inner peripheral
cylindrical portion
Prior art date
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JP2000018453A (en
Inventor
雅之 丹羽
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Toyota Boshoku Corp
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Toyota Boshoku Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/14—Joints for pipes of different diameters or cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/002—Sleeves or nipples for pipes of the same diameter; Reduction pieces
    • F16L21/005—Sleeves or nipples for pipes of the same diameter; Reduction pieces made of elastic material, e.g. partly or completely surrounded by clamping devices

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints With Sleeves (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、流体用のダクトの接合部、例えば空気の排出用のダクトの接合部構造に関する。
【０００２】
【従来の技術】
図５に示すように、２本のダクト７０、７４を接合する場合に、ダクト７０、７４の直径に差を設け、間にインシュレータ７２を介在して嵌合させ、クランプ７６でインシュレータ７２を外側から締め付けてダクト７０、７４との間をシールする構造が用いられている。
【０００３】
実開平６−８０９８４号公報では、ダクト７０の端部にインシュレータ７２に形成された環状溝７３を嵌入させる。インシュレータ７２の内側壁７２Ａの端部にはダクト７０に向かって突起部７２Ｃが形成されており、これにより、内側壁７２Ａの外周面とダクト７０の内周面との間に間隙ｔが設けられる。このため、ダクト７４をダクト７０へ挿入するとき、内側壁７２Ａをダクト７０側へ撓ませながら挿入すればよいため、ダクト７４の挿入が容易である。
【０００４】
また、ダクト７４の外周面の端部には爪部７４Ａが形成されており、ダクト７４を挿入するときに、インシュレータ７２の突起部７２Ｃ付近では内側壁７２Ａの撓み代が少ないため、ダクト７４の端部は点線で示すように、突起部７２Ｃの手前で停止するようになっている。
【０００５】
さらに、クランプ７６でインシュレータ７２を締め付けたとき、外側壁７２Ｂがダクト７０へ押し付けられ外側壁７２Ｂとダクト７０のシール性は高まるが、ダクト７０は変形しないため、内側壁７２Ａは内側へ縮径しない。従って、ダクト７４は内側壁７２Ａとの間に発生する摩擦力によって接合されているに過ぎず、ダクト７４と内側壁７２Ａのシール性に懸念が生じる。
【０００６】
一方、図６に示す実公平７−４９１８９号公報のように、ダクト８０の先端部には長手方向に向かってスリット８２が形成されている。また、インシュレータ８４の内側壁８４Ａ及び外側壁８４Ｂの末端は、スリット８２の終端を越える位置まで伸びてスリット８２を覆っている。そして、内側壁８４Ａの内側にダクト８６の外周面が当接している。
【０００７】
さらに、クランプ８８がスリット８２の中間位置で外側壁８４Ｂを締め付けている。これにより、スリット８２が形成された箇所ではダクト８０が縮小方向に撓み、内側壁８４Ａをダクト８６へ向かって押し付け、ダクト８６と内側壁８４Ａの間の気密を保つ。
【０００８】
また、クランプ８８でスリット８２の終端を越えた場所に位置する外側壁８４Ｂを締め付ける。これにより、内側壁８４Ａの末端からスリット８２の終端へ通ずる漏れの経路は閉塞され気密が保てるようになっている。
【０００９】
しかし、ダクト８０の外周面と外側壁８４Ｂの接触面は何れもフラットであるため、接触面積が大きく、締め付け力が分散されてしまう。従って、クランプ８８を複数使用して締め付け力を増大させる必要がある。
【００１０】
【発明が解決しようとする課題】
本発明は、小さな締め付け力でダクトの接合部のシール性を向上させ、簡単にダクト同士を接合できるダクトの接合部構造を提供することを課題とする。
【００１１】
【課題を解決するための手段】
請求項１に記載の発明では、シール部材が、筒部と、カバー部と、環状溝とで構成されており、筒部は外ダクトの内側へ挿入され、この筒部の端部を外側へ折り返すようにしてカバー部が形成されている。また、カバー部と筒部との間には環状溝が形成されており、この環状溝が外ダクトへ装着される。
【００１２】
そして、筒部へ内ダクトが挿入された状態で、シール部材のカバー部が、クランプによって締め付けられる。これにより、内ダクトと外ダクトの接合部分のシール性が高まる。
【００１３】
一方、外ダクトには先端部から長手方向に向かって複数のスリットが形成されており、筒部に突設された環状の突起部が、スリットの終端を越えた位置でこの外ダクトの内周面を押圧するようになっている。
【００１４】
このように、スリットを形成することにより、クランプでシール部材のカバー部を締め付けたときに、外ダクトが内側に撓み、筒部と内ダクトの密着性が増大し、また、突起部がスリットの終端を越えた位置で外ダクトの内周面を押圧しシール性を保持することができるため、スリット部分を通じて流体が漏れることがない。
【００１５】
請求項２に記載の発明では、突起部の裏面には凹部が形成されており、この凹部は内ダクトの外周面の先端部に形成された係合部と係合するようになっている。このため、内ダクトをシール部材の内側へ挿入するときの位置決めが容易である。そして、係合したときに係合部が突起部を外ダクトへ向かって押圧するため、突起部が外ダクトの内周面をさらに押圧し、シール性が向上する。
【００１６】
請求項３に記載の発明では、筒部の内周面には複数の環状のリップを有しており、このリップは内ダクトが挿入される方向へ突出している。
【００１７】
このため、リップに案内されて内ダクトが挿入し易くなり、クランプで外ダクトを締め付けたときに、シール部材と内ダクトのシール性がさらに向上する。
【００１８】
【発明の実施の形態】
本形態に係るダクトの接合部構造について説明する。
【００１９】
図１〜図３に示すように、ダクトの接合部構造では、円筒状のダクト１０、１２の間にガスケット１８を介在して嵌合させ、クランプ１６でガスケット１８を外側から締め付けてダクト１０、１２を接合する。ダクト１２はダクト１０よりも直径が小さくなっており、ガスケット１８の内側に挿入可能となっている。
【００２０】
一方、ダクト１０は、先端部から長手方向に向かって複数のスリット１４が周方向に一定間隔で形成されている。このため、クランプ１６でガスケット１８を締め付けたときにダクト１０が内側に撓み、ダクト１０とダクト１２の間に位置するガスケット１８の内周壁２２がダクト１２へ押し付けられ（図４参照）、内周壁２２とダクト１２のシール性が向上する。
【００２１】
また、ダクト１０は先端部に向かって徐々に薄肉となっており、この薄肉の部分がガスケット１８をダクト１０に装着させるときにガイドの機能を果たしている。
【００２２】
一方、ガスケット１８は筒状をしており、内周壁２２がダクト１０の内側へ挿入される。この内周壁２２の端部をダクト１０の外側へ折り返すようにして外周壁２４が設けられ、内周壁２２と外周壁２４の間には環状溝２０が形成されている。この環状溝２０がダクト１０へ装着される。
また、環状溝２０の奥方には掛止部２０Ａが形成されており、ダクト１０の先端に形成された爪部１０Ａが引っ掛かるようになっている。さらに、環状溝２０の口部（内周壁２２の外周面）には突起部２０Ｂが突設されており、スリット１４の終端を越えた位置でダクト１０の内周面を押圧するようになっている（図４参照）。このため、スリット１４から流体が漏れることがない。
また、外周壁２４には切下げ面２４Ａが形成されており、クランプ１６を装着するときの装着基準となっている。この切下げ面２４Ａの略中間部をクランプ１６で締め付けることで効率よくスリット１４が縮径し、内周壁２２がダクト１２へ密着してシール性が向上する。
【００２３】
なお、本形態では、クランプ１６を切下げ面２４Ａの略中間部に装着したが、スリット１４の部分からスリット１４の終端を越えた位置に跨がって装着してもよい。
【００２４】
さらに、内周壁２２の内周面の端部（突起部２０Ｂの裏側）には環状の凹部２２Ｂが形成されている。一方、ダクト１２の端部には外側に向かって環状の係合部１２Ａが形成されており、ダクト１２を内周壁２２に挿入させたときに、係合部１２Ａが凹部２２Ｂと係合するようになっている。
【００２５】
このため、ダクト１２を内周壁２２へ挿入するときの位置決めが容易であり、また、係合部１２Ａが突起部２０Ｂをダクト１０へ押圧するため、突起部２０Ｂがダクト１０をさらに押圧し、突起部２０Ｂとダクト１０とのシール性がさらに向上する。
【００２６】
また、内周壁２２の内周面には複数の環状のリップ２２Ａが形成されており、ダクト１２が挿入される方向へ突出している。このため、リップ２２Ａに案内されてダクト１２が挿入し易く、また、リップ２２Ａとダクト１２が密着するため、内周壁２２とダクト１２のシール性が向上する。
【００２７】
次に、ダクトの接合方法について説明する。
【００２８】
まず、ダクト１０の先端に設けられた爪部１０Ａに環状溝２０の掛止部２０Ａが掛止するまで、ガスケット１８を押し込む。これにより、ガスケット１８の突起部２０Ｂがスリット１４の終端を越えた部位に位置し、同時にガスケット１８が位置決めされる。
【００２９】
そして、ガスケット１８の内側にダクト１２を挿入する。このとき、ダクト１２の係合部１２Ａが内周壁２２のリップ２２Ａを通過して、凹部２２Ｂに係合するまでダクト１２を挿入する。
【００３０】
次に、切下げ面２４Ａにクランプ１６を装着し、締め付けて外周壁２４をダクト１０に密着させる。このとき、スリット１４によりダクト１０は内側に撓み、内周壁２２の外周面をダクト１２に向かって押し付ける。
【００３１】
そして、同時にダクト１０が突起部２０Ｂをさらに押圧しシール性が向上する。このようにして、ダクト１０とダクト１２が接合される。
【００３２】
【発明の効果】
本発明は上記構成としたので、請求項１に記載の発明では、外ダクト及び内ダクトの接合部分から流体が漏れることがない。請求項２に記載の発明では、内ダクトをシール部材の内側へ挿入するときの位置決めが容易であり、また、突起部が外ダクトの内周面をさらに押圧するため、シール性が向上する。請求項３に記載の発明では、リップに案内されて内ダクトが挿入し易くなり、クランプで外ダクトを締め付けたときに、シール部材と内ダクトのシール性がさらに向上する。
【図面の簡単な説明】
【図１】本形態に係るダクトの接合部構造を示す分解斜視図である。
【図２】本形態に係るダクトの接合部構造を示す分解図である。
【図３】本形態に係るダクトの接合部構造を示す断面図である。
【図４】本形態に係るダクトの接合部構造を示す拡大断面図である。
【図５】従来に係るダクトの接合部構造を示す分解図である。
【図６】（Ａ）は従来に係るダクトの接合部構造を示す分解図であり、（Ｂ）は断面図である。
【符号の説明】
１２Ａ 係合部
１４ スリット
１８ ガスケット（シール部材）
２０ 環状溝
２０Ｂ 突起部
２２ 内周壁（筒部）
２２Ａ リップ
２２Ｂ 凹部
２４ 外周壁（カバー部）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint structure of a duct for fluid, for example, a joint structure of a duct for discharging air.
[0002]
[Prior art]
As shown in FIG. 5, when joining two ducts 70, 74, a difference is made in the diameters of the ducts 70, 74, and the insulator 72 is fitted between them with a clamp 76 interposed therebetween. A structure is used in which the gap between the ducts 70 and 74 is sealed.
[0003]
In Japanese Utility Model Laid-Open No. 6-80984, an annular groove 73 formed in the insulator 72 is fitted into the end of the duct 70. A protrusion 72C is formed at the end of the inner wall 72A of the insulator 72 toward the duct 70, whereby a gap t is provided between the outer peripheral surface of the inner wall 72A and the inner peripheral surface of the duct 70. . For this reason, when inserting the duct 74 into the duct 70, it is only necessary to insert the inner wall 72A while bending the inner wall 72A toward the duct 70. Therefore, the insertion of the duct 74 is easy.
[0004]
Further, a claw 74A is formed at the end of the outer peripheral surface of the duct 74, and when the duct 74 is inserted, the bending allowance of the inner wall 72A is small in the vicinity of the protrusion 72C of the insulator 72. As shown by the dotted line, the end portion stops before the projection 72C.
[0005]
Further, when the insulator 72 is tightened with the clamp 76, the outer wall 72B is pressed against the duct 70 and the sealing performance between the outer wall 72B and the duct 70 is enhanced. . Accordingly, the duct 74 is merely joined by the frictional force generated between the inner wall 72A and there is a concern about the sealing performance between the duct 74 and the inner wall 72A.
[0006]
On the other hand, as shown in Japanese Utility Model Publication No. 7-49189 shown in FIG. The ends of the inner wall 84 </ b> A and the outer wall 84 </ b> B of the insulator 84 extend to a position beyond the end of the slit 82 and cover the slit 82. The outer peripheral surface of the duct 86 is in contact with the inner side wall 84A.
[0007]
Further, the clamp 88 clamps the outer wall 84 </ b> B at the intermediate position of the slit 82. As a result, the duct 80 bends in the reduction direction at the position where the slit 82 is formed, and the inner wall 84A is pressed toward the duct 86, and the airtightness between the duct 86 and the inner wall 84A is maintained.
[0008]
Further, the outer wall 84B located at the place beyond the end of the slit 82 is tightened by the clamp 88. As a result, the leakage path from the end of the inner side wall 84A to the end of the slit 82 is closed and airtight can be maintained.
[0009]
However, since the outer peripheral surface of the duct 80 and the contact surface of the outer wall 84B are both flat, the contact area is large and the fastening force is dispersed. Therefore, it is necessary to increase the clamping force by using a plurality of clamps 88.
[0010]
[Problems to be solved by the invention]
It is an object of the present invention to provide a duct joint structure that can easily join ducts by improving the sealing performance of the duct joints with a small tightening force.
[0011]
[Means for Solving the Problems]
In the first aspect of the present invention, the seal member includes a cylindrical portion, a cover portion, and an annular groove, and the cylindrical portion is inserted inside the outer duct, and an end portion of the cylindrical portion is outward. A cover portion is formed so as to be folded. An annular groove is formed between the cover portion and the cylinder portion, and this annular groove is attached to the outer duct.
[0012]
And the cover part of a sealing member is fastened with a clamp in the state where the inner duct was inserted in the cylinder part. Thereby, the sealing performance of the junction part of an inner duct and an outer duct improves.
[0013]
On the other hand, a plurality of slits are formed in the outer duct in the longitudinal direction from the front end portion, and the annular protrusion protruding from the cylindrical portion is located at a position beyond the end of the slit. The surface is pressed.
[0014]
Thus, by forming the slit, when the cover portion of the seal member is tightened with the clamp, the outer duct bends inward, the adhesion between the cylindrical portion and the inner duct is increased, and the protrusion is the slit. Since the inner peripheral surface of the outer duct can be pressed at the position beyond the terminal end to maintain the sealing performance, fluid does not leak through the slit portion.
[0015]
In the second aspect of the present invention, a recess is formed on the back surface of the protrusion, and the recess engages with an engagement portion formed at the tip of the outer peripheral surface of the inner duct. For this reason, positioning when inserting the inner duct into the inside of the seal member is easy. And since an engaging part presses a projection part toward an outer duct when it engages, a projection part further presses the inner peripheral surface of an outer duct, and a sealing performance improves.
[0016]
In the invention according to claim 3, the inner peripheral surface of the cylindrical portion has a plurality of annular lips, and the lips protrude in the direction in which the inner duct is inserted.
[0017]
For this reason, the inner duct is easily inserted by being guided by the lip, and when the outer duct is tightened by the clamp, the sealing performance between the seal member and the inner duct is further improved.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
The duct joint structure according to this embodiment will be described.
[0019]
As shown in FIG. 1 to FIG. 3, in the duct joint structure, the gasket 18 is interposed between the cylindrical ducts 10 and 12, and the gasket 18 is clamped from the outside with the clamps 16. 12 is joined. The duct 12 has a smaller diameter than the duct 10 and can be inserted into the gasket 18.
[0020]
On the other hand, in the duct 10, a plurality of slits 14 are formed at regular intervals in the circumferential direction from the distal end portion toward the longitudinal direction. For this reason, when the gasket 18 is tightened with the clamp 16, the duct 10 bends inward, and the inner peripheral wall 22 of the gasket 18 located between the duct 10 and the duct 12 is pressed against the duct 12 (see FIG. 4). The sealing performance between the duct 22 and the duct 12 is improved.
[0021]
The duct 10 is gradually thinned toward the tip, and this thin portion serves as a guide when the gasket 18 is attached to the duct 10.
[0022]
On the other hand, the gasket 18 has a cylindrical shape, and the inner peripheral wall 22 is inserted into the duct 10. An outer peripheral wall 24 is provided so that an end portion of the inner peripheral wall 22 is folded back to the outside of the duct 10, and an annular groove 20 is formed between the inner peripheral wall 22 and the outer peripheral wall 24. The annular groove 20 is attached to the duct 10.
Further, a latching portion 20A is formed in the back of the annular groove 20, and a claw portion 10A formed at the tip of the duct 10 is hooked. Further, a protrusion 20B is projected from the mouth of the annular groove 20 (the outer peripheral surface of the inner peripheral wall 22), and presses the inner peripheral surface of the duct 10 at a position beyond the end of the slit 14. (See FIG. 4). For this reason, fluid does not leak from the slit 14.
Further, the outer peripheral wall 24 is formed with a cut-down surface 24A, which is a mounting reference when the clamp 16 is mounted. By tightening the substantially intermediate portion of the cut-down surface 24A with the clamp 16, the slit 14 is efficiently reduced in diameter, and the inner peripheral wall 22 is brought into close contact with the duct 12 to improve the sealing performance.
[0023]
In this embodiment, the clamp 16 is mounted on the substantially middle portion of the cut-down surface 24A. However, the clamp 16 may be mounted across the slit 14 from the position beyond the end of the slit 14.
[0024]
Furthermore, an annular recess 22B is formed at the end of the inner peripheral surface of the inner peripheral wall 22 (the back side of the protrusion 20B). On the other hand, an annular engagement portion 12A is formed at the end of the duct 12 toward the outside, and when the duct 12 is inserted into the inner peripheral wall 22, the engagement portion 12A engages with the recess 22B. It has become.
[0025]
For this reason, positioning when inserting the duct 12 into the inner peripheral wall 22 is easy, and since the engaging portion 12A presses the protruding portion 20B against the duct 10, the protruding portion 20B further presses the duct 10, and the protrusion The sealing performance between the portion 20B and the duct 10 is further improved.
[0026]
A plurality of annular lips 22A are formed on the inner peripheral surface of the inner peripheral wall 22 and protrude in the direction in which the duct 12 is inserted. For this reason, the duct 12 is easily inserted by being guided by the lip 22A, and the lip 22A and the duct 12 are in close contact with each other, so that the sealing performance between the inner peripheral wall 22 and the duct 12 is improved.
[0027]
Next, a method for joining ducts will be described.
[0028]
First, the gasket 18 is pushed in until the hook portion 20A of the annular groove 20 is hooked on the claw portion 10A provided at the tip of the duct 10. As a result, the protruding portion 20B of the gasket 18 is located at a position beyond the end of the slit 14, and the gasket 18 is positioned at the same time.
[0029]
Then, the duct 12 is inserted inside the gasket 18. At this time, the duct 12 is inserted until the engaging portion 12A of the duct 12 passes through the lip 22A of the inner peripheral wall 22 and engages with the recess 22B.
[0030]
Next, the clamp 16 is attached to the cut-down surface 24 </ b> A and tightened to bring the outer peripheral wall 24 into close contact with the duct 10. At this time, the duct 10 is bent inward by the slit 14, and the outer peripheral surface of the inner peripheral wall 22 is pressed toward the duct 12.
[0031]
At the same time, the duct 10 further presses the protrusion 20B, and the sealing performance is improved. In this way, the duct 10 and the duct 12 are joined.
[0032]
【The invention's effect】
Since the present invention is configured as described above, in the first aspect of the present invention, fluid does not leak from the joint portion of the outer duct and the inner duct. In the second aspect of the invention, positioning when the inner duct is inserted into the seal member is easy, and the protruding portion further presses the inner peripheral surface of the outer duct, so that the sealing performance is improved. In the third aspect of the invention, the inner duct is easily inserted by being guided by the lip, and when the outer duct is tightened by the clamp, the sealing performance between the seal member and the inner duct is further improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a duct joint structure according to the present embodiment.
FIG. 2 is an exploded view showing a joint structure of a duct according to the present embodiment.
FIG. 3 is a cross-sectional view showing a joint structure of a duct according to the present embodiment.
FIG. 4 is an enlarged cross-sectional view illustrating a duct joint structure according to the present embodiment.
FIG. 5 is an exploded view showing a conventional joint structure of a duct.
6A is an exploded view showing a conventional joint structure of a duct, and FIG. 6B is a cross-sectional view.
[Explanation of symbols]
12A Engagement part 14 Slit 18 Gasket (seal member)
20 annular groove 20B protrusion 22 inner peripheral wall (cylinder part)
22A Lip 22B Concave 24 Outer peripheral wall (cover part)

Claims (3)

外ダクトの内側へ挿入される筒部と、前記筒部の端部を外側へ折り返すようにして形成されたカバー部と、前記カバー部と前記筒部との間に形成され、前記外ダクトへ装着される環状溝と、で構成されたシール部材と、前記筒部へ内ダクトが挿入された状態で前記シール部材の前記カバー部を締め付けるクランプと、を備えたダクトの接合部構造であって、
前記外ダクトの先端部から長手方向に向かって形成された複数のスリットと、前記筒部に突設され、前記スリットの終端を越えた位置で前記外ダクトの内周面を押圧する環状の突起部と、を有していることを特徴とするダクトの接合部構造。A cylindrical portion inserted into the outer duct, a cover portion formed so as to fold the end portion of the cylindrical portion outward, and formed between the cover portion and the cylindrical portion, to the outer duct A duct joint structure comprising: an annular groove to be mounted; and a seal member configured to clamp the cover portion of the seal member in a state where an inner duct is inserted into the tube portion. ,
A plurality of slits formed in the longitudinal direction from the front end portion of the outer duct, and an annular protrusion protruding from the cylindrical portion and pressing the inner peripheral surface of the outer duct at a position beyond the end of the slit And a duct joint structure characterized by comprising: 前記筒部に形成され、前記突起部の裏面に位置する凹部と、前記内ダクトの外周面の先端部に形成され、前記凹部と係合して前記突起部を前記外ダクトへ押圧する係合部と、を有することを特徴とする請求項１に記載のダクトの接合部構造。Engagement formed on the cylindrical portion and located on the back surface of the projection and at the front end of the outer peripheral surface of the inner duct to engage the recess and press the projection against the outer duct The duct joint structure according to claim 1, further comprising: a portion. 前記筒部の内周面に形成され、前記内ダクトの挿入方向へ突出した複数の環状のリップを有することを特徴とする請求項１又は２に記載のダクトの接合部構造。The duct joint structure according to claim 1 or 2, further comprising a plurality of annular lips formed on an inner peripheral surface of the cylindrical portion and projecting in an insertion direction of the inner duct.
JP19031598A 1998-07-06 1998-07-06 Duct joint structure Expired - Fee Related JP3733750B2 (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
JP19031598A JP3733750B2 (en) 1998-07-06 1998-07-06 Duct joint structure

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JP2000018453A JP2000018453A (en) 2000-01-18
JP3733750B2 true JP3733750B2 (en) 2006-01-11

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KR20030088194A (en) * 2002-05-13 2003-11-19 기아자동차주식회사 Structure for assembling an air intake hose in a vehicle
JP4268138B2 (en) * 2002-12-20 2009-05-27 ハスクバーナ・ゼノア株式会社 Leading air control device for stratified scavenging two-cycle engine
US7614378B2 (en) * 2007-03-27 2009-11-10 Denso International America, Inc. Flexible seal and molded rigid chamber
KR100826275B1 (en) 2007-04-27 2008-04-30 (주)문명에이스 prefabricated duct flange
KR100877141B1 (en) 2008-08-12 2009-01-07 구본춘 Duct connector for ventilation plastic
JPWO2012077654A1 (en) * 2010-12-08 2014-05-19 株式会社Roki Tube structure
KR200490909Y1 (en) * 2019-05-14 2020-01-21 (주)한솔일렉트로닉스 A connecting duct for air conditioning and heating
CN115163361A (en) * 2022-08-09 2022-10-11 奇瑞汽车股份有限公司 Air inlet pipe structure and vehicle

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