JP7611094B2

JP7611094B2 - Intake duct

Info

Publication number: JP7611094B2
Application number: JP2021136985A
Authority: JP
Inventors: 治樹加藤; 麻人松浦
Original assignee: Inoac Corp
Current assignee: Inoac Corp
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2025-01-09
Anticipated expiration: 2041-08-25
Also published as: JP2023031479A

Description

この発明は、エアクリーナに接続される吸気ダクトに関するものである。 This invention relates to an intake duct that is connected to an air cleaner.

吸気ダクトは、エアクリーナの接続口に下流端部を差し込んで、エアクリーナに接続される（例えば特許文献１参照）。ここで、エアクリーナの接続口と吸気ダクトの下流端部との隙間から、エンジンルーム内の高温の空気を吸い込んだり、エンジン騒音の漏れを防止したりするため、下流端部にウレタンフォーム製のシール材を取り付けて、隙間を封止することが行われている。 The intake duct is connected to the air cleaner by inserting its downstream end into the air cleaner's connection port (see, for example, Patent Document 1). Here, in order to suck in hot air from the engine room through the gap between the air cleaner's connection port and the downstream end of the intake duct and to prevent engine noise from leaking, a urethane foam sealant is attached to the downstream end to seal the gap.

特開２０１７－１１５６４３号公報JP 2017-115643 A

前述の吸気ダクトは、シール材を付加するために部品点数が増加し、シール材を取り付けるための手間がかかるなどにより、コストが嵩んでしまう。 The aforementioned intake duct increases costs due to the increased number of parts required to add sealing material and the time required to install the sealing material.

本発明は、従来の技術に係る前記問題に鑑み、これらを好適に解決するべく提案されたものであって、コストを低減できる安価な吸気ダクトを提供することを目的とする。 The present invention has been proposed in consideration of the above problems associated with the conventional technology, and aims to provide an inexpensive intake duct that can reduce costs.

前記課題を克服し、所期の目的を達成するため、本発明に係る吸気ダクトは、
エアクリーナの接続口に差し込まれる嵌合部と、
前記嵌合部の外面から張り出し、前記接続口と前記嵌合部との間を塞ぐ封止部と、を備え、
前記封止部は、前記嵌合部と同一材料で形成され、弾性変形可能であることを要旨とする。 In order to overcome the above problems and achieve the intended object, the intake duct of the present invention comprises:
A fitting portion that is inserted into a connection port of an air cleaner;
a sealing portion that protrudes from an outer surface of the fitting portion and closes a gap between the connection port and the fitting portion,
The sealing portion is formed of the same material as the fitting portion and is elastically deformable.

本発明に係る吸気ダクトによれば、コストを低減できる。 The air intake duct of the present invention can reduce costs.

本発明の実施例に係る吸気ダクトを示す側面図である。1 is a side view showing an intake duct according to an embodiment of the present invention. 実施例の吸気ダクトを示す正面図である。FIG. 2 is a front view showing the intake duct of the embodiment. 実施例の吸気ダクトを示す斜視図である。FIG. 2 is a perspective view showing an intake duct of the embodiment. 実施例の吸気ダクトを分解して示す斜視図である。FIG. 2 is an exploded perspective view of the intake duct of the embodiment. 実施例の吸気ダクトの要部を拡大して示す端面図であり、（ａ）はエアクリーナに取り付ける前であり、(ｂ)はエアクリーナに取り付けた状態を示す。4A and 4B are enlarged end views showing a main portion of the intake duct of the embodiment, in which FIG. 4A shows the duct before it is attached to the air cleaner, and FIG. 4B shows the duct after it is attached to the air cleaner. 封止部の変更例を示す要部拡大図である。13 is an enlarged view of a main part showing a modified example of the sealing portion. FIG.

次に、本発明に係る吸気ダクトにつき、好適な実施例を挙げて、添付図面を参照して以下に説明する。なお、実施例では、自動車等の車両の吸気系に用いられるインレットダクトとも呼ばれる吸気ダクトを示している。 Next, the intake duct according to the present invention will be described below with reference to a preferred embodiment and the accompanying drawings. Note that the embodiment shows an intake duct, also called an inlet duct, used in the intake system of a vehicle such as an automobile.

図１～図３に示すように、実施例に係る吸気ダクト１０は、空気を取入口１０ａから送出口１０ｂへ向けて案内する空気流通路１２を有し、下流にあるエアクリーナ１００（図１参照）に空気を案内する。図４に示すように、実施例の吸気ダクト１０は、複数（実施例では２つ）の分割体１４Ａ,１４Ｂを、互いの縁を突き合わせて爪嵌合により組み付けて筒状にしている。実施例では、送出口１０ｂや後述する嵌合部１６や封止部２０を含む吸気ダクト１０の下流端部が、第１分割体１４Ａで形成されている、一方、吸気ダクト１０の下流端部を除く取入口１０ａや空気流通路１２の大部分が、第１分割体１４Ａと第２分割体Ｂとの組み合わせにより形成されている。分割体１４Ａ,１４Ｂとしては、例えば、ポリプロピレン（ＰＰ）、ポリエチレン（ＰＥ）、ポリ塩化ビニル（ＰＶＣ）、アクリロニトリル・ブタジエン・スチレン共重合樹脂（ＡＢＳ）などの合成樹脂の成形品を用いることができる。 As shown in Figures 1 to 3, the intake duct 10 according to the embodiment has an air flow passage 12 that guides air from the intake 10a to the delivery outlet 10b, and guides the air to the downstream air cleaner 100 (see Figure 1). As shown in Figure 4, the intake duct 10 according to the embodiment is formed into a cylindrical shape by assembling multiple (two in the embodiment) divided bodies 14A and 14B by butting their edges together and fitting them with claws. In the embodiment, the downstream end of the intake duct 10, including the delivery outlet 10b and the fitting portion 16 and sealing portion 20 described below, is formed by the first divided body 14A, while the intake 10a and most of the air flow passage 12, excluding the downstream end of the intake duct 10, are formed by a combination of the first divided body 14A and the second divided body B. The segments 14A and 14B can be made of synthetic resins such as polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), and acrylonitrile-butadiene-styrene copolymer resin (ABS).

図１～図３に示すように、吸気ダクト１０において送出口１０ｂが設けられた下流端部には、エアクリーナ１００の接続口１０２の内側に差し込まれる嵌合部１６が設けられている。嵌合部１６の外形状は、接続口１０２の内形状と相似形で形成されている。実施例では、四角形の接続口１０２の内形状に合わせて、嵌合部１６の外形状が四角形に形成されている。また、嵌合部１６の外寸法は、接続口１０２の内寸法よりもわずかに小さく設定されている。嵌合部１６の根元には、外側へ張り出したフランジ部１８が設けられている。嵌合部１６を接続口１０２に差し込んだ際に、フランジ部１８を接続口１０２の開口端に当てて、嵌合部１６の差し込み位置を規定可能になっている（図５(ｂ)参照）。 As shown in Figures 1 to 3, the downstream end of the intake duct 10 where the delivery port 10b is provided is provided with a fitting portion 16 that is inserted into the inside of the connection port 102 of the air cleaner 100. The outer shape of the fitting portion 16 is formed similar to the inner shape of the connection port 102. In the embodiment, the outer shape of the fitting portion 16 is formed in a square shape to match the inner shape of the square connection port 102. The outer dimensions of the fitting portion 16 are set slightly smaller than the inner dimensions of the connection port 102. A flange portion 18 that protrudes outward is provided at the base of the fitting portion 16. When the fitting portion 16 is inserted into the connection port 102, the flange portion 18 abuts against the open end of the connection port 102, making it possible to determine the insertion position of the fitting portion 16 (see Figure 5(b)).

図１～図３に示すように、吸気ダクト１０は、嵌合部１６の外面から張り出し、接続口１０２と嵌合部１６との間を塞ぐ封止部２０を備えている。嵌合部１６および封止部２０は、同一の材料で形成されている。実施例では、嵌合部１６および封止部２０を含む第１分割体１４Ａを型成形することで、嵌合部１６および封止部２０を、継ぎ目なく一体的に形成している。 As shown in Figures 1 to 3, the intake duct 10 has a sealing portion 20 that protrudes from the outer surface of the fitting portion 16 and seals the space between the connection port 102 and the fitting portion 16. The fitting portion 16 and the sealing portion 20 are made of the same material. In this embodiment, the first divided body 14A including the fitting portion 16 and the sealing portion 20 are molded to form the fitting portion 16 and the sealing portion 20 seamlessly and integrally.

封止部２０は、弾性変形可能である。図５に示すように、封止部２０は、嵌合部１６における接続口１０２への挿脱方向（嵌合部１６の接続口１０２への差し込み方向）へ曲げ変形するようになっている。ここで、嵌合部１６は、比較的肉厚を厚くすることで撓み難くなっている。これに対して、封止部２０は、嵌合部１６よりも肉厚を薄く形成することで、嵌合部１６と同一の材料であっても、弾性変形可能になっている。 The sealing portion 20 is elastically deformable. As shown in FIG. 5, the sealing portion 20 is designed to bend and deform in the direction of insertion and removal into and from the connection port 102 in the fitting portion 16 (the direction of inserting the fitting portion 16 into the connection port 102). Here, the fitting portion 16 is made relatively thick to prevent bending. In contrast, the sealing portion 20 is made thinner than the fitting portion 16, so that it can elastically deform even if it is made of the same material as the fitting portion 16.

図１および図５に示すように、封止部２０は、嵌合部１６の外面から立ち上がるフィン状である。実施例の封止部２０は、嵌合部１６の外面と直交するように張り出している。封止部２０は、嵌合部１６の外面と接続口１０２の内面との間隔よりも大きく張り出している。封止部２０は、嵌合部１６に連なる根元よりも先端の方が薄くなっている（図５参照）。これにより、封止部２０は、根元側よりも先端側の方が弾性変形し易くなっている。実施例の封止部２０は、その厚み方向（嵌合部１６における接続口１０２への挿脱方向）の両面が、根元から先端へ向かうにつれて互いに近づくように傾斜している。 As shown in Figs. 1 and 5, the sealing portion 20 is fin-shaped and rises from the outer surface of the fitting portion 16. In the embodiment, the sealing portion 20 protrudes perpendicular to the outer surface of the fitting portion 16. The sealing portion 20 protrudes more than the distance between the outer surface of the fitting portion 16 and the inner surface of the connection port 102. The sealing portion 20 is thinner at the tip than at the base that connects to the fitting portion 16 (see Fig. 5). This makes the sealing portion 20 more susceptible to elastic deformation at the tip side than at the base side. In the embodiment, both sides of the sealing portion 20 in the thickness direction (the direction of insertion/removal into the connection port 102 in the fitting portion 16) are inclined so that they approach each other from the base to the tip.

図２に示すように、封止部２０は、嵌合部１６を囲むように配置されている。実施例の封止部２０は、嵌合部１６の全周に亘って連続した閉環状に形成されている。封止部２０が、嵌合部１６における接続口１０２への挿脱方向に離して複数列設けられている。隣り合う封止部２０は、弾性変形した封止部２０が隣の封止部２０に当たらない程度離すとよく、例えば、封止部２０における接続口１０２とのラップ寸法程度に設定することが可能である。 As shown in FIG. 2, the sealing portion 20 is arranged to surround the fitting portion 16. In the embodiment, the sealing portion 20 is formed in a continuous closed ring shape around the entire circumference of the fitting portion 16. The sealing portions 20 are provided in multiple rows spaced apart in the direction of insertion into and removal from the connection port 102 in the fitting portion 16. Adjacent sealing portions 20 should be spaced apart enough so that the elastically deformed sealing portion 20 does not hit the adjacent sealing portion 20, and can be set to, for example, approximately the lap dimension between the sealing portion 20 and the connection port 102.

図６に示すように、封止部２０には、切れ目２２を設けてもよい。切れ目２２は、例えば、封止部２０の先端に開放しており、封止部２０の先端から根元側へ向かうにつれて幅が狭くなる「Ｖ」字形状としたり（図６参照）、スリット形状にしたり、その他の形状にするなどが可能である。実施例の切れ目２２は、封止部２０の先端から封止部２０の途中位置まで形成されている。切れ目２２は、封止部２０が変形した際に、切れ目２２の開口縁同士が重なるなどにより切れ目２２が閉じるように設定するとよい。切れ目２２は、封止部２０において嵌合部１６のコーナー部分（図６(ａ)参照）および／またはコーナー部分近傍から張り出す部位（図６(ｂ)参照）に設けることが好ましい。また、切れ目２２は、複数列の封止部２０において同じ部位に設けてもよいが、隣り合う封止部２０において、切れ目２２を互いにずらして配置してもよい。例えば、一列目の封止部２０のコーナー部分に切れ目２２を形成した場合（図６(ａ)参照）、二列目の封止部２０においてコーナー部分近傍に切れ目２２を形成して（図６(ｂ)参照）、切れ目２２の位置を互いにずらすことができる。 As shown in FIG. 6, the sealing portion 20 may have a slit 22. The slit 22 may be, for example, a "V" shape that opens at the tip of the sealing portion 20 and narrows from the tip to the base side of the sealing portion 20 (see FIG. 6), a slit shape, or other shapes. In the embodiment, the slit 22 is formed from the tip of the sealing portion 20 to a midway position of the sealing portion 20. The slit 22 may be set so that the opening edges of the slit 22 overlap each other when the sealing portion 20 is deformed, and the slit 22 closes. The slit 22 is preferably provided in the corner portion of the fitting portion 16 of the sealing portion 20 (see FIG. 6(a)) and/or in the portion protruding from the vicinity of the corner portion (see FIG. 6(b)). The slit 22 may be provided in the same portion in multiple rows of the sealing portions 20, or the slits 22 may be arranged offset from each other in adjacent sealing portions 20. For example, if a slit 22 is formed in the corner portion of the first row of sealing portions 20 (see FIG. 6(a)), a slit 22 can be formed near the corner portion of the second row of sealing portions 20 (see FIG. 6(b)), and the positions of the slits 22 can be shifted from each other.

前述した吸気ダクト１０は、嵌合部１６を接続口１０２に差し込むことで、嵌合部１６の外面から張り出して弾性変形可能である封止部２０により、接続口１０２と嵌合部１６との間を塞いで、内部からの空気の漏れや外部からの水の浸入を防止できる。このとき、封止部２０は、接続口１０２の内面に当たって嵌合部１６の差し込み方向と反対側へ曲がっている。そして、曲がる前の元の形状へ戻ろうとする弾性が封止部２０において働くことで、封止部２０で接続口１０２の内面を強く押さえて、接続口１０２と嵌合部１６との間を適切に封止できる。吸気ダクト１０およびエアクリーナ１００の内側が、空気の吸い込みにより負圧になると、外側へ曲がった封止部２０が内側へ向けて引っ張られて、接続口１０２の内面に強く当たることになる。封止部２０は、嵌合部１６を接続口１０２に差し込むことで外側へ曲がるので、内側から負圧がかかって封止部２０が引っ張られても、接続口１０２の内面を乗り越えて内側へ変形できないことから、接続口１０２と嵌合部１６との間の封止状態を保つことができる。 The intake duct 10 described above can prevent air leakage from the inside and water intrusion from the outside by inserting the fitting portion 16 into the connection port 102 with the sealing portion 20, which protrudes from the outer surface of the fitting portion 16 and is elastically deformable, sealing the gap between the connection port 102 and the fitting portion 16. At this time, the sealing portion 20 hits the inner surface of the connection port 102 and bends in the opposite direction to the insertion direction of the fitting portion 16. Then, the elasticity of the sealing portion 20, which tries to return to its original shape before bending, works in the sealing portion 20, so that the sealing portion 20 strongly presses the inner surface of the connection port 102 and can properly seal the gap between the connection port 102 and the fitting portion 16. When the inside of the intake duct 10 and the air cleaner 100 becomes negative pressure due to the intake of air, the sealing portion 20 bent outward is pulled inward and hits the inner surface of the connection port 102 strongly. The sealing portion 20 bends outward when the fitting portion 16 is inserted into the connection port 102. Even if negative pressure is applied from the inside and the sealing portion 20 is pulled, it cannot overcome the inner surface of the connection port 102 and deform inward, so the sealed state between the connection port 102 and the fitting portion 16 can be maintained.

実施例の吸気ダクト１０は、取入口１０ａ側を車体に固定し、嵌合部１６をエアクリーナ１００の接続口１０２に差し込んで取り付けている。嵌合部１６を接続口１０２に差し込んだ際に、封止部２０が嵌合部１６と接続口１０２のとの間にあるので、車両走行時等の振動を封止部２０が弾性変形して吸収し、異音の発生を防止できる。また、嵌合部１６や接続口１０２の寸法誤差を、封止部２０の弾性変形により吸収して、嵌合部１６と接続口１０２の間を適切に封止できる。 The intake duct 10 of the embodiment is attached by fixing the intake 10a side to the vehicle body and inserting the fitting 16 into the connection port 102 of the air cleaner 100. When the fitting 16 is inserted into the connection port 102, the sealing portion 20 is between the fitting 16 and the connection port 102, so that the sealing portion 20 elastically deforms to absorb vibrations caused when the vehicle is running, preventing the generation of abnormal noise. In addition, the elastic deformation of the sealing portion 20 absorbs dimensional errors in the fitting 16 and the connection port 102, allowing the space between the fitting 16 and the connection port 102 to be properly sealed.

前述したように、封止部２０は、嵌合部１６の外面から張り出す簡単な形状であるので、封止部２０の形成にかかるコストを抑えることができる。また、封止部２０が嵌合部１６と同一材料であることで、第１分割体１４Ａを成形するときに嵌合部１６と一緒に封止部２０を形成することができる。このように、嵌合部１６および封止部２０を一体に形成することで、部品点数の増加を抑えたり、封止部２０の取り付け手間を省いたりするなどにより、吸気ダクト１０にかかるコストを低減することができる。 As mentioned above, the sealing portion 20 has a simple shape that protrudes from the outer surface of the fitting portion 16, so the cost of forming the sealing portion 20 can be reduced. In addition, because the sealing portion 20 is made of the same material as the fitting portion 16, the sealing portion 20 can be formed together with the fitting portion 16 when molding the first divided body 14A. In this way, by integrally forming the fitting portion 16 and the sealing portion 20, the cost of the intake duct 10 can be reduced by preventing an increase in the number of parts and eliminating the labor required to attach the sealing portion 20.

封止部２０が嵌合部１６に同一材料により連ねて形成されているので、別体のシール材を貼り付けた場合のように、嵌合部１６の接続口１０２への差し込みによって封止部２０が位置ずれすることはない。従って、封止部２０が接続口１０２からはみ出して見栄えが悪化したり、嵌合部１６と接続口１０２との間の封止不良が発生したりすることを防止できる。封止部２０は、その厚みや形状を変えて変形し易さを簡単に変更することができ、封止性や接続口１０２への組み付け性を簡単に調整できる。封止部２０は、嵌合部１６（吸気ダクト１０の本体部分）と同じ熱や振動等に耐性を有する材料で構成できるので、ウレタンフォーム製のシール材のように加水分解して劣化したり、熱や振動等による経年劣化によって弾性を失ったりすることなどを回避できる。このように、封止部２０によれば、封止性や振動吸収性などの機能を長期間に亘って発揮できる。 Since the sealing portion 20 is formed in a continuous manner with the fitting portion 16 using the same material, the sealing portion 20 will not be displaced by inserting the fitting portion 16 into the connection port 102, as would be the case if a separate sealing material were attached. Therefore, it is possible to prevent the sealing portion 20 from protruding from the connection port 102, causing a poor appearance, or to prevent poor sealing between the fitting portion 16 and the connection port 102. The sealing portion 20 can be easily modified in its thickness and shape to change its ease of deformation, and its sealing properties and its ease of assembly to the connection port 102 can be easily adjusted. Since the sealing portion 20 can be made of a material that is resistant to the same heat and vibration as the fitting portion 16 (the main body of the intake duct 10), it is possible to avoid deterioration due to hydrolysis, as with a sealing material made of urethane foam, or loss of elasticity due to deterioration over time caused by heat, vibration, etc. In this way, the sealing portion 20 can provide functions such as sealing properties and vibration absorption over a long period of time.

封止部２０は、嵌合部１６に連なる根元よりも先端の方が薄くなっている。このようにすることで、接続口１０２の内面に当たる封止部２０の先端側が変形し易くなり、嵌合部１６を接続口１０２へ差し込み易くなる。そして、封止部２０の先端側が接続口１０２の内面に追従するように変形して、嵌合部１６と接続口１０２との間を適切に封止できる。また、封止部２０の根元側が比較的厚いことで、封止部２０が根元から折れ曲がることを抑えることができる。そして、封止部２０の比較的厚い根元側による反力が働くので、嵌合部１６と接続口１０２との間を適切に封止できる。 The sealing portion 20 is thinner at the tip than at the base that is connected to the fitting portion 16. This makes it easier for the tip side of the sealing portion 20 that comes into contact with the inner surface of the connection port 102 to deform, making it easier to insert the fitting portion 16 into the connection port 102. The tip side of the sealing portion 20 then deforms to conform to the inner surface of the connection port 102, allowing for an appropriate seal between the fitting portion 16 and the connection port 102. In addition, the relatively thick base side of the sealing portion 20 prevents the sealing portion 20 from bending at the base. A reaction force is applied by the relatively thick base side of the sealing portion 20, allowing for an appropriate seal between the fitting portion 16 and the connection port 102.

封止部２０を、嵌合部１６における接続口１０２への差し込み方向に離して複数列設けることで、接続口１０２と嵌合部１６との間を適切に封止できる。ここで、複数列の封止部２０を設けても、封止部２０に用いる材料や手間が少ないことから、コストの増加を抑えることができる。 By providing multiple rows of sealing parts 20 spaced apart in the direction of insertion into the connection port 102 in the fitting part 16, it is possible to properly seal between the connection port 102 and the fitting part 16. Even if multiple rows of sealing parts 20 are provided, the amount of material and effort used for the sealing parts 20 is small, so an increase in costs can be suppressed.

封止部２０に切れ目２２を設けることで、切れ目２２の開口縁同士が近づくような封止部２０の周方向への変形も可能となる。これにより、封止部２０が接続口１０２の内面に追従し易くなり、嵌合部１６と接続口１０２との間を適切に封止できる。特に、封止部２０において嵌合部１６のコーナー部分に対応する部位またはこの近傍部位に切れ目２２を設けると、接続口１０２の内面におけるコーナー部分に沿って周方向へ変形しようとする封止部２０の動きが切れ目２２で許容され、コーナー部分を封止部２０によって適切に封止できる。 By providing the slits 22 in the sealing portion 20, it is also possible for the sealing portion 20 to deform in the circumferential direction such that the opening edges of the slits 22 approach each other. This makes it easier for the sealing portion 20 to follow the inner surface of the connection port 102, and the area between the fitting portion 16 and the connection port 102 can be properly sealed. In particular, if the slits 22 are provided in the sealing portion 20 at a portion corresponding to the corner portion of the fitting portion 16 or in a portion nearby, the slits 22 allow the movement of the sealing portion 20 that attempts to deform in the circumferential direction along the corner portion of the inner surface of the connection port 102, and the corner portion can be properly sealed by the sealing portion 20.

（変更例）
前述した事項に限らず、例えば以下のようにしてもよい。なお、本発明は、実施例および以下の変更例の具体的な記載のみに限定されるものではない。
（１）封止部は、嵌合部の外面と直交するように張り出す構成に限らず、嵌合部の外面に対して斜めに張り出していてもよい。
（２）封止部は、厚み方向の両面を傾けて先細り形状とすることに限らず、厚み方向の一面を傾けて先細り形状としてもよい。
（３）封止部は、実施例の数に限らず、１列であっても、２列であっても、４列以上であってもよい。
（４）複数の封止部の張り出し寸法が同じである構成に限らず、複数の封止部がある場合、封止部の張り出し寸法が異なっていてもよい。例えば、送出口側から取入口側の列になるにつれて封止部の張り出し寸法を大きくしたり、小さくしたりするなどが挙げられる。 (Example of change)
The present invention is not limited to the above, and may be, for example, as follows: It should be noted that the present invention is not limited to the specific descriptions of the examples and the following modified examples.
(1) The sealing portion is not limited to a configuration in which it protrudes perpendicular to the outer surface of the fitting portion, and may protrude obliquely with respect to the outer surface of the fitting portion.
(2) The sealing portion is not limited to having a tapered shape with both sides in the thickness direction tilted, and may have a tapered shape with one side in the thickness direction tilted.
(3) The number of sealing portions is not limited to that in the embodiment, and may be one row, two rows, or four or more rows.
(4) The configuration is not limited to the case where the protruding dimensions of the multiple sealing parts are the same, and when there are multiple sealing parts, the protruding dimensions of the sealing parts may be different. For example, the protruding dimensions of the sealing parts may be increased or decreased from the row on the delivery side to the row on the intake side.

１６嵌合部，２０封止部，２２切れ目，１００エアクリーナ，１０２接続口 16 Fitting part, 20 Sealing part, 22 Slit, 100 Air cleaner, 102 Connection port

Claims

A fitting portion that is inserted into a connection port of an air cleaner;
a sealing portion that protrudes from an outer surface of the fitting portion in a direction perpendicular to the outer surface and closes a gap between the connection port and the fitting portion,
the sealing portion is formed of the same material as the fitting portion, is bendable and deformable in a direction in which the fitting portion is inserted and removed, and has a cross-sectional shape along the direction in which the fitting portion is inserted and removed that is a triangle having a height longer than a base,
A cut is formed from the tip of the sealing portion.
An intake duct characterized by:

A fitting portion that is inserted into a connection port of an air cleaner;
a sealing portion that protrudes from an outer surface of the fitting portion and closes a gap between the connection port and the fitting portion,
the sealing portion is made of the same material as the fitting portion and is elastically deformable;
The sealing portions are provided in a plurality of rows spaced apart from one another in a direction in which the fitting portion is inserted into the connection port,
An intake duct, characterized in that the slits formed from the tips of the sealing portions are provided at positions that are offset from each other in adjacent sealing portions.

A fitting portion that is inserted into a connection port of an air cleaner;
a sealing portion that protrudes from an outer surface of the fitting portion and closes a gap between the connection port and the fitting portion;
an intake port provided at an end of the intake duct opposite to the fitting portion,
the sealing portion is formed of the same material as the fitting portion and the intake port, is bendable and deformable in a direction in which the fitting portion is inserted and removed, and has a cross-sectional shape along the direction in which the fitting portion is inserted and removed that is a triangle whose height is longer than its base,
A cut is formed from the tip of the sealing portion.
An intake duct characterized by:

A fitting portion that is inserted into a connection port of an air cleaner;
a sealing portion that protrudes from an outer surface of the fitting portion and closes a gap between the connection port and the fitting portion;
a flange portion that projects from an outer surface of a base of the fitting portion and is capable of contacting an open end of the connection port,
the sealing portion is formed of the same material as the fitting portion, is bendable and deformable in a direction in which the fitting portion is inserted and removed, and has a cross-sectional shape along the direction in which the fitting portion is inserted and removed that is a triangle having a height longer than a base,
A cut is formed from the tip of the sealing portion.
An intake duct characterized by: