JPH068383Y2 - Duct hose - Google Patents
Duct hoseInfo
- Publication number
- JPH068383Y2 JPH068383Y2 JP1989134016U JP13401689U JPH068383Y2 JP H068383 Y2 JPH068383 Y2 JP H068383Y2 JP 1989134016 U JP1989134016 U JP 1989134016U JP 13401689 U JP13401689 U JP 13401689U JP H068383 Y2 JPH068383 Y2 JP H068383Y2
- Authority
- JP
- Japan
- Prior art keywords
- hard
- tube portion
- duct hose
- bellows
- foam layer
- 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.)
- Expired - Lifetime
Links
Landscapes
- Pipe Accessories (AREA)
- Joints Allowing Movement (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案はダクトホースに関する。このダクトホースは、
例えば、自動車のエンジンに外気を導入する吸気系装
置、具体的にはエアクリーナ、エアフローメータ、吸気
マニホールド、ターボ過給機等につながるホースに利用
できる。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a duct hose. This duct hose
For example, it can be used for an intake system device that introduces outside air into an automobile engine, specifically, an air cleaner, an air flow meter, an intake manifold, a hose connected to a turbocharger, and the like.
［従来の技術］ ダクトホース、例えば、自動車のエンジンに外気を導入
する吸気系装置で使用されるダクトホースとして、第３
図に示すように、軟質ゴム製の蛇腹状の蛇腹管部２００
と、蛇腹管部２００と別体をなし硬質樹脂製の直管状の
硬質管部２０１とを用い、蛇腹管部２００と硬質管部２
０１とを嵌合した状態でクランプ具等により連結したも
のが知られている。このダクトホースは、エアクリーナ
１００、過給機１０１を経てエンジン１０２に空気を供
給する。[Prior Art] As a duct hose, for example, a duct hose used in an intake system device that introduces outside air into an automobile engine,
As shown, a bellows-shaped bellows tube portion 200 made of soft rubber is formed.
And a straight tubular hard tube portion 201 made of a hard resin, which is a separate body from the bellows tube portion 200, and the bellows tube portion 200 and the hard tube portion 2 are used.
It is known that 01 and 01 are connected with each other by a clamp tool or the like. The duct hose supplies air to the engine 102 via the air cleaner 100 and the supercharger 101.
また他のダクトホースとして、第４図および第５図に示
すように、軟質ゴム製の蛇腹状の蛇腹管部２０５と、硬
質樹脂製の直管状の硬質管部２０６とを一体的に成形し
たものが知られている。更に、第６図に示すように直管
状の硬質管部２０７を、硬質樹脂製の内層２０７ａと軟
質ゴム製の外層２０７ｂとで一体的に成形して形成した
ダクトホースが知られている。As another duct hose, as shown in FIG. 4 and FIG. 5, a bellows-shaped bellows tube portion 205 made of soft rubber and a straight tubular hard tube portion 206 made of hard resin are integrally molded. Things are known. Further, as shown in FIG. 6, a duct hose is known in which a straight tubular hard tube portion 207 is integrally molded with an inner layer 207a made of hard resin and an outer layer 207b made of soft rubber.
［考案が解決しようとする課題］ 第３図に示すダクトホースでは、使用条件によっては蛇
腹管部２００と硬質管部２０１との連結部分から空気漏
れが生じることがある。また部品点数も多くなるため組
付けコストが高くなる。[Problems to be Solved by the Invention] In the duct hose shown in FIG. 3, air leakage may occur from the connecting portion between the bellows pipe portion 200 and the hard pipe portion 201 depending on the use conditions. In addition, the number of parts is increased and the assembly cost is increased.
第４図および第５図に示すダクトホース及び第６図に示
すダクトホースでは、蛇腹管部２０５と硬質管部２０
６、２０７とが一体的に成形されているので、空気漏れ
の解消、部品点数の低減では有利である。In the duct hose shown in FIGS. 4 and 5 and the duct hose shown in FIG. 6, the bellows pipe portion 205 and the hard pipe portion 20 are provided.
Since 6 and 207 are integrally molded, it is advantageous in eliminating air leakage and reducing the number of parts.
ところで近年、産業界では、空気漏れの解消、部品点数
の低減の他に、ダクトホースを用いた装置における騒音
の一層の低減も要請されている。例えば、自動車の分野
では自動車の車室内の静粛性などの要請から、自動車の
吸気系で生じる吸気音をダクトホース外に出さない、す
なわち、消音特性とか遮音特性のすぐれたダクトホース
が求められている。By the way, in recent years, in addition to eliminating air leakage and reducing the number of parts, the industry has been required to further reduce noise in a device using a duct hose. For example, in the field of automobiles, due to demands for quietness in the passenger compartment of automobiles, the intake noise generated in the intake system of automobiles is not emitted to the outside of the duct hose, that is, a duct hose with excellent sound deadening and sound insulation properties is required. There is.
本考案は上記した実情に鑑み開発されたものであり、そ
の技術的課題は、吸気音等の騒音の低減に有利なダクト
ホースを提供することにある。The present invention has been developed in view of the above-mentioned circumstances, and its technical problem is to provide a duct hose advantageous for reducing noise such as intake noise.
［課題を解決するための手段］ 本考案者は鋭意研究した結果、硬質管部の振動により外
部に音が伝搬することが騒音の主な原因になっているこ
とに着目し、硬質管部の内面部に発泡層を積層すれば、
騒音を低減できることを知見し、この知見に基づき本考
案を完成させたものである。[Means for Solving the Problem] As a result of earnest research by the present inventor, attention has been paid to the fact that the main cause of noise is the propagation of sound to the outside due to the vibration of the hard pipe section. By stacking a foam layer on the inner surface,
We have found that noise can be reduced, and have completed the present invention based on this finding.
即ち、本考案のダクトホースは、軟質材料を主体とする
蛇腹状の蛇腹管部と、蛇腹管部に連設された硬質材料を
主体とする硬質管部とで構成され、 少なくとも硬質管部の内面部には発泡材料で形成された
発泡層が一体的に積層されていることを特徴とするもの
である。That is, the duct hose of the present invention is composed of a bellows-shaped bellows tube part mainly made of a soft material and a hard tube part mainly made of a hard material connected to the bellows tube part. A foam layer formed of a foam material is integrally laminated on the inner surface portion.
蛇腹管部は例えばポリプロピレンとエチレン・プロピレ
ン系ゴムのブレンド物、ポリアミドとエチレン・プロピ
レン系ゴムのブレンド物、エステル系化合物とエーテル
系化合物の共重合体等の軟質材料で形成されている。蛇
腹管部の弾性率は３００〜９０００ｋｇ／ｃｍ２程度と
するのが好ましい。The bellows tube portion is formed of a soft material such as a blend of polypropylene and ethylene / propylene rubber, a blend of polyamide and ethylene / propylene rubber, and a copolymer of an ester compound and an ether compound. The elastic modulus of the bellows tube portion is preferably about 300 to 9000 kg / cm 2 .
硬質管部はポリオレフィン、ポリアミド、ポリエステル
等の樹脂、またはそれらの樹脂をガラス繊維等で補強し
た硬質材料で形成されている。The hard tube portion is formed of a resin such as polyolefin, polyamide, or polyester, or a hard material obtained by reinforcing these resins with glass fiber or the like.
また硬質管部は、硬い筒状の補強部をインサートしても
よい。硬質管部の弾性率は例えば、４００〜７０００ｋ
ｇ／cm2とすることができる。Further, the hard tube portion may have a hard tubular reinforcing portion inserted therein. The elastic modulus of the hard pipe part is, for example, 400 to 7,000 k
It can be g / cm 2 .
発泡層の見掛け比重は必要に応じ適宜選択できるが、硬
質管部への振動の伝達を効果的に阻止し、減衰するため
見掛け比重を小さくすることができ、例えば、０．０１
〜０．７ｇ／cm3とすることができる。The apparent specific gravity of the foamed layer can be appropriately selected as necessary, but the apparent specific gravity can be reduced by effectively blocking and damping the transmission of vibration to the hard pipe portion. For example, 0.01
It can be up to 0.7 g / cm 3 .
発泡層を形成する発泡材料としてはウレタン樹脂、ポリ
塩化ビニル樹脂等、通常使用されている発泡樹脂を用い
ることができる。なお発泡層は独立気孔をもつ発泡材料
でも、連続気孔をもつ発泡材料で形成してもよい。As the foam material for forming the foam layer, a commonly used foam resin such as urethane resin or polyvinyl chloride resin can be used. The foam layer may be formed of a foam material having independent pores or a foam material having continuous pores.
本考案のダクトホースは例えばブロー成形で形成でき
る。即ち、先ず、硬質管部および蛇腹管部となる外パリ
ソン、発泡層となる内パリソンを押出機により同軸的に
押し出して形成する。そして、そのパリソンを成形型の
キャビティ内に配置し、その後成形型を型締めして成形
型の一端部を閉じる。次に、成形型の他端からパリソン
内に圧縮空気を導入して外パリソンおよび内パリソンを
成形型の内面に密着させ、成形型に相応する硬質管部お
よび蛇腹管部を形成すると共に内パリソンを発泡させて
発泡層を形成する。また、蛇腹管部と硬質管部とを通常
通りブロー成形あるいは型成形したのち、その内部に発
泡層を型成形してもよい。この方法は発泡層をウレタン
フォームで形成する場合に有利である。The duct hose of the present invention can be formed by blow molding, for example. That is, first, the outer parison that becomes the hard tube portion and the bellows tube portion and the inner parison that becomes the foam layer are coaxially extruded by an extruder. Then, the parison is placed in the cavity of the mold, and then the mold is clamped to close one end of the mold. Next, compressed air is introduced into the parison from the other end of the mold to bring the outer parison and the inner parison into close contact with the inner surface of the mold to form a hard pipe part and a bellows pipe part corresponding to the mold and the inner parison. Is foamed to form a foamed layer. Alternatively, the bellows tube portion and the hard tube portion may be blow molded or molded as usual, and then the foam layer may be molded therein. This method is advantageous when the foam layer is formed of urethane foam.
［作用］ 少なくとも硬質管部の内面部には発泡層が一体的に積層
されているため、硬質管部への振動の伝達を効果的に阻
止するとともに振動している硬質管部の振動を吸収し、
外部にもれる騒音を減少させることができる。[Operation] Since the foam layer is integrally laminated at least on the inner surface of the hard pipe portion, it effectively blocks the transmission of vibration to the hard pipe portion and absorbs the vibration of the vibrating hard pipe portion. Then
The noise leaked to the outside can be reduced.
［実施例］ 本考案のダクトホースを第１図に示す第１実施例に従っ
て説明する。[Embodiment] The duct hose of the present invention will be described according to a first embodiment shown in FIG.
本実施例のダクトホースは、蛇腹状の蛇腹管部１と、蛇
腹管部１に連設された非蛇腹状の硬質管部２とで構成さ
れている。蛇腹管部１は、軟質材料であるポリプロピレ
ンとエチレン・プロピレン系ゴムとのブレンド材で形成
されている。蛇腹管部１の平均肉厚ｔ１は０．５〜３mm
程度であり、曲げ弾性率は３００〜９０００ｋｇ／ｃｍ
２程度である。硬質管部２は硬質材料としてのガラス繊
維で補強したポリアミドで形成されている。硬質管部２
の肉厚ｔ２は２〜３mm程度であり、曲げ弾性率は４００
〜７００００ｋｇ／cm2程度である。The duct hose of the present embodiment is composed of a bellows-shaped bellows tube portion 1 and a non-bellows-shaped hard tube portion 2 connected to the bellows tube portion 1. The bellows tube portion 1 is formed of a blend material of polypropylene, which is a soft material, and ethylene / propylene rubber. The average wall thickness t1 of the bellows tube portion 1 is 0.5 to 3 mm
The flexural modulus is 300 to 9000 kg / cm.
It is about 2 . The hard tube portion 2 is made of polyamide reinforced with glass fiber as a hard material. Hard tube part 2
Has a thickness t2 of about 2 to 3 mm and a flexural modulus of 400
It is about 70,000 kg / cm 2 .
硬質管部２の内面部および蛇腹管部１の内面部には、発
泡層３が一体的に積層されている。発泡層はウレタンフ
ォームで形成されている。発泡層３の肉厚ｔ３は２〜４
mm程度であり、発泡率は０．０１〜０．７ｇ／cm3であ
る。The foam layer 3 is integrally laminated on the inner surface of the hard tube portion 2 and the inner surface of the bellows tube portion 1. The foam layer is made of urethane foam. The thickness t3 of the foam layer 3 is 2 to 4
The foaming rate is 0.01 to 0.7 g / cm 3 .
このダクトホースは次のように製造した。即ち、まず蛇
腹管部１と硬質管部２を通常の２色押出してパリソンを
形成し、その後ブロー成形を実施し、その後、このホー
スを型に組み込み、ホースの内面にウレタン原液を注入
し、発泡させて発泡層３を得た。This duct hose was manufactured as follows. That is, first, the bellows tube portion 1 and the hard tube portion 2 are extruded in the usual two colors to form a parison, then blow molding is performed, then this hose is incorporated into a mold, and a urethane stock solution is injected into the inner surface of the hose, Foaming was performed to obtain a foamed layer 3.
本実施例のダクトホースでは、硬質管部２の内面部およ
び蛇腹管部１の内面部には発泡層３が一体的に積層され
ているため、硬質管部２への振動の伝達を効果的に阻止
できると共に、振動している硬質管部２の振動を吸収で
き、従って外部にもれる騒音を低減させることができ
る。また、蛇腹管部１の内面部にも発泡層３が一体的に
積層されているが、発泡層３は曲げ弾性率が小さいの
で、蛇腹管部１の良好な屈曲性を損なわない。In the duct hose of this embodiment, since the foam layer 3 is integrally laminated on the inner surface of the hard pipe portion 2 and the inner surface of the bellows pipe portion 1, it is possible to effectively transmit the vibration to the hard pipe portion 2. In addition to being able to prevent the vibration of the vibrating hard tube portion 2, it is possible to reduce the noise leaked to the outside. Further, the foam layer 3 is also integrally laminated on the inner surface of the bellows tube portion 1. However, since the foam layer 3 has a small bending elastic modulus, the good flexibility of the bellows tube portion 1 is not impaired.
本考案のダクトホースの第２実施例を第２図に示す。こ
のダクトホースは第１実施例の場合と基本的には同じ構
成である。ただし、硬質管部４は、ポリプロピレンとエ
チレン・プロピレン系ゴムとのブレンド材で蛇腹管部１
と一体的に形成された外層４ａと、ガラス繊維入りポリ
アミドで形成された内層４ｂとで形成されている。第２
実施例においても、硬質管部４の内面部および蛇腹管部
１の内面部には発泡層３が一体的に積層されているた
め、硬質管部４の内層４ｂへの振動の伝達を効果的に阻
止でき、又、振動している内層４ｂの進動を吸収でき、
従って騒音を低減するのに有利である。A second embodiment of the duct hose of the present invention is shown in FIG. This duct hose has basically the same structure as that of the first embodiment. However, the hard tube part 4 is made of a blend material of polypropylene and ethylene / propylene rubber, and the bellows tube part 1
And an inner layer 4b made of glass fiber-containing polyamide. Second
Also in the embodiment, since the foam layer 3 is integrally laminated on the inner surface portion of the hard pipe portion 4 and the inner surface portion of the bellows pipe portion 1, it is possible to effectively transmit the vibration to the inner layer 4b of the hard pipe portion 4. Can be blocked, and the advancing movement of the vibrating inner layer 4b can be absorbed,
Therefore, it is advantageous to reduce noise.
なお、第１実施例のダクトホース、第２実施例のダクト
ホースは、第３図に示した従来の場合と同様に、エアク
リーナー１００、過給機１０１、エンジン１０２を備え
た自動車の吸気系に使用することができるが、これに限
らずコンプレッサ等の他の装置に使用することもでき
る。The duct hose of the first embodiment and the duct hose of the second embodiment are the same as the conventional case shown in FIG. 3, but the intake system of an automobile equipped with the air cleaner 100, the supercharger 101, and the engine 102. However, the present invention is not limited to this and can also be used for other devices such as a compressor.
［考案の効果］ 本考案のダクトホースによれば、発泡層が硬質管部の内
面部に積層されているので、消音特性、遮音特性に優れ
ており、吸気音等の騒音を低減するのに有利である。[Advantage of the Invention] According to the duct hose of the present invention, since the foam layer is laminated on the inner surface of the hard pipe portion, it is excellent in sound deadening characteristics and sound insulation characteristics, and is effective in reducing noise such as intake noise. It is advantageous.
第１図は本考案にかかる第１実施例のダクトホースの要
部を示す断面図、第２図は本考案の第２実施例のダクト
ホースの要部を示す断面図である。 第３図は従来のダクトホースを過給機に使用した状態を
示す側面図、第４図は異なる従来のダクトホースを過給
機に使用した状態を一部断面にして示す側面図、第５図
は第４図に示すダクトホースの要部を示す拡大断面図、
第６図は更に異なる従来のダクトホースの要部を示す拡
大断面図である。 図中、１は蛇腹管部、２は硬質管部、４は硬質管部、４
ａは外層、４ｂは内層を示す。FIG. 1 is a sectional view showing an essential part of a duct hose of the first embodiment according to the present invention, and FIG. 2 is a sectional view showing an essential part of a duct hose of the second embodiment of the present invention. FIG. 3 is a side view showing a state in which a conventional duct hose is used in a supercharger, and FIG. 4 is a side view in which a state in which a different conventional duct hose is used in a supercharger is partially sectioned, and FIG. The figure is an enlarged cross-sectional view showing the main part of the duct hose shown in FIG.
FIG. 6 is an enlarged cross-sectional view showing a main part of still another conventional duct hose. In the figure, 1 is a bellows tube part, 2 is a hard tube part, 4 is a hard tube part, 4
Reference symbol a indicates an outer layer and reference symbol 4b indicates an inner layer.
Claims (1)
と、前記蛇腹管部に連設された硬質材料を主体とする硬
質管部とで構成され、 少なくとも前記硬質管部の内面部には発泡材料で形成さ
れた発泡層が一体的に積層されていることを特徴とする
ダクトホース。1. A bellows-shaped bellows tube portion mainly made of a soft material and a hard tube portion mainly made of a hard material continuous with the bellows tube portion, and at least an inner surface portion of the hard tube portion. The duct hose is characterized in that a foam layer formed of a foam material is integrally laminated on the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989134016U JPH068383Y2 (en) | 1989-11-17 | 1989-11-17 | Duct hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989134016U JPH068383Y2 (en) | 1989-11-17 | 1989-11-17 | Duct hose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0372181U JPH0372181U (en) | 1991-07-22 |
| JPH068383Y2 true JPH068383Y2 (en) | 1994-03-02 |
Family
ID=31681387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989134016U Expired - Lifetime JPH068383Y2 (en) | 1989-11-17 | 1989-11-17 | Duct hose |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH068383Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009119609A (en) * | 2007-11-12 | 2009-06-04 | Togawa Sangyo Kk | Resin laminate tube |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60168625A (en) * | 1984-02-13 | 1985-09-02 | Ekuseru Kk | Manufacture of hollow molded article provided with composite material and manufacturing device thereof |
| JPH0825230B2 (en) * | 1987-06-12 | 1996-03-13 | エクセル株式会社 | Hollow molded article in which foam cells on the inner peripheral surface are ruptured and method for producing the same |
-
1989
- 1989-11-17 JP JP1989134016U patent/JPH068383Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009119609A (en) * | 2007-11-12 | 2009-06-04 | Togawa Sangyo Kk | Resin laminate tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0372181U (en) | 1991-07-22 |
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