JP2006105342A - Pipe structure including branching pipe - Google Patents

Pipe structure including branching pipe Download PDF

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Publication number
JP2006105342A
JP2006105342A JP2004295641A JP2004295641A JP2006105342A JP 2006105342 A JP2006105342 A JP 2006105342A JP 2004295641 A JP2004295641 A JP 2004295641A JP 2004295641 A JP2004295641 A JP 2004295641A JP 2006105342 A JP2006105342 A JP 2006105342A
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pipe
branch
branching
molded product
branch pipe
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Riyougo Murayama
僚悟 村山
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Kojima Industries Corp
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Kojima Press Industry Co Ltd
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  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe structure including a branching pipe the number of component parts of which is smaller than in the case of the prior art. <P>SOLUTION: (1) The pipe structure 10 includes a pipe body 20 having a main pipe section and a branching section 22, at least the branching section 22 being formed of rigid material, and the branching pipe 30 having a body portion 31 and a joint portion 32 connected to the branching section 22 of the pipe body 20. The branching pipe 30 is a molded product of two different kinds of material, the body portion 31 of which is formed of soft material and the joint portion 32 of which is formed of the rigid material. (2) The pipe body 20 is a three-dimensional exchange-blow molded product. (3) The inner diameter of the branching section 22 of the pipe body 20 becomes smaller toward the branching pipe 30. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、枝分かれ管を備える管構造に関する。   The present invention relates to a pipe structure including a branch pipe.

従来の枝分かれ管を備える管構造は、自動車の２つのエアクリーナと１つのスロットルボデーとの間に配置される場合、図３に示すように、管本体２と枝分かれ管３を備える。
管本体２は、硬質材からなり、ブロー成形品である。管本体２の両端部には、軟質材からなるゴムホース４が嵌め込まれている。管本体２の端部とゴムホース４とはホースクランプ５で締め付けられている。
枝わかれ管３は、軟質材からなる。枝分かれ管３は、管本体２とストットルボデーとを連結するために設けられる。枝分かれ管３は、管本体２の枝分かれ部２ａに取付けられる。枝分かれ管３と管本体２の枝分かれ部２ａとは、ホースクランプ５で締め付けられている。
管本体２の両端部と枝分かれ部２ａには、ホースクランプ５の締付け力で管本体２が破損することを防止するためにカラー６が嵌められている。 A conventional pipe structure including a branch pipe includes a pipe body 2 and a branch pipe 3 as shown in FIG. 3 when arranged between two air cleaners and one throttle body of an automobile.
The tube body 2 is made of a hard material and is a blow molded product. A rubber hose 4 made of a soft material is fitted into both ends of the tube body 2. The end of the tube body 2 and the rubber hose 4 are fastened by a hose clamp 5.
The branched pipe 3 is made of a soft material. The branch pipe 3 is provided in order to connect the pipe body 2 and the stall body. The branch pipe 3 is attached to the branch part 2 a of the pipe body 2. The branch pipe 3 and the branch portion 2 a of the pipe body 2 are fastened by a hose clamp 5.
A collar 6 is fitted to both ends of the tube body 2 and the branching portion 2a in order to prevent the tube body 2 from being damaged by the tightening force of the hose clamp 5.

しかし、従来の枝分かれ管を備える管構造には、つぎの問題点がある。
１つの管本体２と、１つの枝分かれ管３と、３つのカラー６と、３つのホースクランプ５と、２つのゴムホース４とを、有するので、部品点数が多い。
また、管本体２に吸気音を低減させるために図示略のレゾネータを設けようとしても、管本体２がブロー成形品であるため困難である。
特開平８−２３００６６号公報 特開平８−１９２４５７号公報 特開２００１−３８７９９号公報 However, the conventional pipe structure including a branch pipe has the following problems.
Since it has one pipe body 2, one branch pipe 3, three collars 6, three hose clamps 5, and two rubber hoses 4, the number of parts is large.
Further, it is difficult to provide an unillustrated resonator in the pipe body 2 to reduce the intake noise because the pipe body 2 is a blow molded product.
JP-A-8-230066 JP-A-8-192457 JP 2001-38799 A

本発明が解決しようとする問題点は、部品点数が多いことである。
本発明の目的は、部品点数が従来より少ない枝分かれ管を備える管構造を提供することにある。 The problem to be solved by the present invention is that the number of parts is large.
An object of the present invention is to provide a pipe structure including a branch pipe having a smaller number of parts than conventional ones.

上記目的を達成する本発明はつぎの通りである。
（１） 主管部と枝分かれ部を備え少なくとも前記枝分かれ部が硬質材からなる管本体と、
本体部と前記管本体の枝分かれ部に結合される結合部とを備える枝分かれ管と、
を有し、
前記枝分かれ管は、前記本体部が軟質材からなり前記結合部が硬質材からなる２色成形品である、枝分かれ管を備える管構造。
（２） 前記管本体は３次元エクスチェンジブロー成形品である（１）記載の枝分かれ管を備える管構造。
（３） 前記管本体の枝分かれ部の内径は前記枝分かれ管側にいくにしたがって小とされている（１）記載の枝分かれ管を備える管構造。 The present invention for achieving the above object is as follows.
(1) A pipe main body having a main pipe part and a branch part, wherein at least the branch part is made of a hard material,
A branch pipe comprising a main body part and a coupling part coupled to the branch part of the pipe body;
Have
The said branch pipe is a pipe structure provided with the branch pipe which is a 2 color molded product in which the said main-body part consists of a soft material, and the said connection part consists of a hard material.
(2) A pipe structure including the branch pipe according to (1), wherein the pipe body is a three-dimensional exchange blow molded product.
(3) A pipe structure including the branch pipe according to (1), wherein an inner diameter of the branch portion of the pipe body is made smaller toward the branch pipe side.

上記（１）の枝分かれ管を備える管構造では、枝分かれ管が、本体部が軟質材からなり結合部が硬質材からなる２色成形品である。そのため、本体部が軟質材であっても、管本体の枝分かれ部と枝分かれ管の結合部との硬質材同士の結合が可能である。そのため、管本体の枝分かれ部と枝分かれ管の結合部とを熱板溶着等することができる。その結果、管本体と枝分かれ管との結合にホースクランプやカラーは不要である。したがって、従来に比べて、部品点数を削減できる。
上記（２）の枝分かれ管を備える管構造では、管本体が３次元エクスチェンジブロー成形品であるため、両端部を軟質材で成形しそれ以外の部位を硬質材で成形した管本体とすることができる。その結果、従来とは異なり、管本体の両端部にゴムホースを設けホースクランプで締め付ける必要はない。また、管本体の両端部のカラーも不要になる。したがって、従来に比べて、部品点数を削減できる。
上記（３）の枝分かれ管を備える管構造では、管内の流れの圧力損失を低くすることができる。その結果、エンジン性能が向上し、低騒音になる。 In the pipe structure provided with the branch pipe of (1) above, the branch pipe is a two-color molded product in which the main body portion is made of a soft material and the coupling portion is made of a hard material. Therefore, even if the main body portion is a soft material, it is possible to bond the hard materials of the branch portion of the tube main body and the joint portion of the branch tube. Therefore, the branching part of the pipe body and the joint part of the branching pipe can be subjected to hot plate welding or the like. As a result, no hose clamps or collars are required for coupling the tube body and the branch tube. Therefore, the number of parts can be reduced as compared with the prior art.
In the pipe structure provided with the branch pipe of (2) above, the pipe body is a three-dimensional exchange blow molded product. it can. As a result, unlike the prior art, there is no need to provide rubber hoses at both ends of the tube body and tighten them with a hose clamp. Further, the collars at both ends of the tube main body are not necessary. Therefore, the number of parts can be reduced as compared with the prior art.
In the pipe structure including the branched pipe (3), the pressure loss of the flow in the pipe can be reduced. As a result, engine performance is improved and noise is reduced.

本発明実施例の枝分かれ管を備える管構造を、図１、図２を参照して説明する。
本発明実施例の枝分かれ管を備える管構造１０（以下、単に管１０という）は、たとえば、自動車のエンジンルーム内に配置される車両用吸気管に用いられる。ただし、管１０は、車両用吸気管以外に用いられていてもよい（図示例では、管１０が車両用吸気管に用いされる場合を示している）。以下、本発明実施例では、管１０が車両用吸気管に用いられる場合を例にとって説明する。
管１０は、自動車のエアクリーナ４０とスロットルボデー５０との間に配置される。管１０は、自動車の２つのエアクリーナ４０と１つのスロットルボデー５０との間に配置される。
管１０は、図１に示すように、主管部２１と枝分かれ部２２を備え少なくとも枝分かれ部２２が硬質材からなる管本体２０と、本体部３１と管本体２０の枝分かれ部２２に結合される結合部３２とを備える枝分かれ管３０と、を有する。 A pipe structure including a branch pipe according to an embodiment of the present invention will be described with reference to FIGS.
A pipe structure 10 (hereinafter simply referred to as a pipe 10) including a branch pipe according to an embodiment of the present invention is used for, for example, a vehicle intake pipe disposed in an engine room of an automobile. However, the pipe 10 may be used other than the vehicle intake pipe (in the illustrated example, the case where the pipe 10 is used for the vehicle intake pipe is shown). Hereinafter, in the embodiment of the present invention, a case where the pipe 10 is used for a vehicle intake pipe will be described as an example.
The tube 10 is disposed between the air cleaner 40 and the throttle body 50 of the automobile. The pipe 10 is arranged between two air cleaners 40 and one throttle body 50 of the automobile.
As shown in FIG. 1, the pipe 10 includes a main pipe portion 21 and a branch portion 22, and at least the branch portion 22 is made of a hard material. A branch pipe 30 having a portion 32.

管本体２０は、３次元エクスチェンジブロー成形品である。ここで、３次元エクスチェンジブロー成形とは、２種類の材料（ソフト材とハード材）を射出時に射出装置のノズル部で合流させ、交互に射出速度、射出圧力、タイミングなどをいろいろ変化させることで、ソフト材の効果が強く出た部分とハード材の効果が強く出た部分をもつパリソンをつくり、そのパリソンを割り型内に置き、パリソン内部に空気を吹き込むことによりパリソンを膨らませて押し付けて成形する方法である。管本体２０が３次元エクスチェンジブロー成形品であるので、通常のブロー成形品である場合に比べて、発生するバリの量が少ない。管本体２０を３次元エクスチェンジブロー成形にて成形した後、図２に示すように、主管部２１の両端と枝分かれ部２２の先端はカットされる。   The pipe body 20 is a three-dimensional exchange blow molded product. Here, three-dimensional exchange blow molding means that two kinds of materials (soft material and hard material) are joined at the nozzle part of the injection device at the time of injection, and the injection speed, injection pressure, timing, etc. are alternately changed in various ways. , Make a parison that has a part where the effect of the soft material is strong and a part where the effect of the hard material is strong, place the parison in the split mold, blow the air into the parison and press the parison to inflate It is a method to do. Since the pipe body 20 is a three-dimensional exchange blow-molded product, the amount of burrs generated is small compared to the case of a normal blow-molded product. After the pipe body 20 is formed by three-dimensional exchange blow molding, as shown in FIG.

主管部２１は、図１に示すように、Ｕ字形状またはほぼＵ字形状である。主管部２１の両端部には、蛇腹が設けられている。主管部２１は、両端部が軟質材からなり、両端部以外の部分が硬質材からなる。ここで、硬質材は、たとえば、ポリプロピレンにガラス繊維を１０パーセント含有したもの、または、ポリプロピンにガラス繊維を２０パーセント含有したもの等である。また、軟質材は、たとえば、ポリプロピレンにゴム分を混ぜ合わせたもの等である。   As shown in FIG. 1, the main pipe portion 21 is U-shaped or substantially U-shaped. Bellows are provided at both ends of the main pipe portion 21. Both ends of the main pipe portion 21 are made of a soft material, and portions other than the both ends are made of a hard material. Here, the hard material is, for example, a material containing 10% glass fiber in polypropylene or a material containing 20% glass fiber in polypropyne. The soft material is, for example, a material obtained by mixing rubber with polypropylene.

枝分かれ部２２は、主管部２１の長手方向中間部に設けられている。枝分かれ部２２は、主管部２１の両端部と同じ方向に開放している。
枝分かれ部２２の内径は、図２に示すように、枝分かれ部２２の先端側にいくにしたがって（枝分かれ管３０側にいくにしたがって）小とされている。枝分かれ部２２の内径は、枝分かれ部２２を面取りすることで、枝分かれ管３０側にいくにしたがって小とされていてもよく、枝分かれ部２２を断面Ｒ形状にすることで、枝分かれ管３０側にいくにしたがって小とされていてもよい。
枝分かれ部２２の外周面には、枝分かれ管３０が結合される座２２ａが設けられている。 The branching portion 22 is provided in the middle portion in the longitudinal direction of the main pipe portion 21. The branching portion 22 is open in the same direction as both end portions of the main pipe portion 21.
As shown in FIG. 2, the inner diameter of the branching portion 22 is made smaller as it goes to the tip side of the branching portion 22 (toward the branching tube 30 side). The inner diameter of the branching portion 22 may be reduced as the branching portion 22 is chamfered toward the branching tube 30 side. May be small.
A seat 22 a to which the branch pipe 30 is coupled is provided on the outer peripheral surface of the branch portion 22.

枝分かれ管３０は、管本体２０と別体に形成された後、管本体２０と結合される。
本体部３１は、円筒形状である。本体部３１は、スロットルボデー５０につながるため、軟質材からなる。本体部３１が軟質材からなるため、硬質材からなる管本体２０の枝分かれ部２２と結合することが困難である。
結合部３２は、リング状である。結合部３２は、本体部３１の管本体２０側端部に設けられる。結合部３２は、硬質材からなる。
枝分かれ管３０は、本体部３１が軟質材からなり結合部３２が硬質材からなる２色成形品である。なお、２色成形品では、肉厚の中の形状を工夫して軟質材と硬質材の接触面積を大にすることで、軟質材と硬質材の十分な結合強度を得ることができる。 The branch pipe 30 is formed separately from the pipe body 20 and then coupled to the pipe body 20.
The main body 31 has a cylindrical shape. The main body 31 is made of a soft material because it connects to the throttle body 50. Since the main body portion 31 is made of a soft material, it is difficult to couple with the branching portion 22 of the tube main body 20 made of a hard material.
The coupling portion 32 has a ring shape. The coupling portion 32 is provided at the end of the body portion 31 on the tube body 20 side. The coupling part 32 is made of a hard material.
The branch pipe 30 is a two-color molded product in which the main body portion 31 is made of a soft material and the coupling portion 32 is made of a hard material. In a two-color molded product, a sufficient bonding strength between the soft material and the hard material can be obtained by devising the shape in the wall thickness to increase the contact area between the soft material and the hard material.

本発明実施例の作用、効果を説明する。
枝分かれ管３０が２色成形品である。そのため、本体部３１が軟質材であっても、管本体２０の枝分かれ部２２と枝分かれ管３０の結合部３２との硬質材同士の結合が可能である。そのため、管本体２０の枝分かれ部２２と枝分かれ管３０の結合部３２とを熱板溶着等することができる。その結果、従来とは異なり、管本体と枝分かれ管との結合にホースクランプやカラーは不要である。したがって、従来に比べて、部品点数を削減できる。 The operation and effect of the embodiment of the present invention will be described.
The branch pipe 30 is a two-color molded product. Therefore, even if the main body 31 is a soft material, it is possible to bond the hard material between the branching portion 22 of the tube main body 20 and the connecting portion 32 of the branching tube 30. Therefore, the branch part 22 of the pipe body 20 and the joint part 32 of the branch pipe 30 can be subjected to hot plate welding or the like. As a result, unlike the prior art, no hose clamp or collar is required for coupling the tube body and the branch tube. Therefore, the number of parts can be reduced as compared with the prior art.

管本体２０が３次元エクスチェンジブロー成形品であるため、管本体２０の両端部では軟質材の量を多くしそれ以外の部位では硬質材の量を多くすることにより、両端部を軟質材で成形しそれ以外の部位を硬質材で成形した管本体２０とすることができる。その結果、従来とは異なり、管本体の両端部にゴムホースを設けホースクランプで締め付ける必要はない。また、管本体の両端部のカラーも不要になる。したがって、従来に比べて、部品点数を削減できる。   Since the tube body 20 is a three-dimensional exchange blow-molded product, both ends of the tube body 20 are molded with soft material by increasing the amount of soft material at both ends and increasing the amount of hard material at other parts. And it can be set as the pipe body 20 which shape | molded the other site | part with the hard material. As a result, unlike the prior art, there is no need to provide rubber hoses at both ends of the tube body and tighten them with a hose clamp. Further, the collars at both ends of the tube main body are not necessary. Therefore, the number of parts can be reduced as compared with the prior art.

管本体２０の枝分かれ部２２の内径が枝分かれ管３０側にいくにしたがって小とされているので、空気の流れを急激に絞ったり、空気の流れがエッジに当たることを防止できる。その結果、流れの圧力損失を低くすることができる。したがって、エンジン性能が向上し、低騒音になる。   Since the inner diameter of the branching portion 22 of the pipe body 20 is made smaller as it goes to the branching pipe 30 side, it is possible to prevent the air flow from being suddenly reduced or the air flow from hitting the edge. As a result, the flow pressure loss can be reduced. Therefore, engine performance is improved and noise is reduced.

管本体２０が３次元エクスチェンジブロー成形品であるため、容易に枝分かれ部２２の内径を枝分かれ管３０側にいくにしたがって小にすることができる。
また、管本体２０が３次元エクスチェンジブロー成形品であるため、通常のブロー成形品である場合に比べて管本体２０の肉厚を安定して出すことができ、容易に図示略のレゾネータを主管部２１に取付けることができる。 Since the pipe body 20 is a three-dimensional exchange blow-molded product, the inner diameter of the branch part 22 can be easily reduced as it goes to the branch pipe 30 side.
In addition, since the pipe body 20 is a three-dimensional exchange blow molded product, the thickness of the pipe body 20 can be stabilized more stably than in the case of a normal blow molded product, and a resonator (not shown) can be easily provided. It can be attached to the part 21.

本発明実施例の枝分かれ管を備える管構造の斜視図である。It is a perspective view of a pipe structure provided with the branch pipe of the example of the present invention. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 従来の枝分かれ管を備える管構造の、分解斜視図である。It is a disassembled perspective view of a pipe structure provided with the conventional branch pipe.

符号の説明Explanation of symbols

１０ 枝分かれ管を備える管構造
２０ 管本体
２１ 主管部
２２ 枝分かれ部
３０ 枝分かれ管
３１ 本体部
３２ 結合部
DESCRIPTION OF SYMBOLS 10 Pipe structure provided with branch pipe 20 Pipe main body 21 Main pipe part 22 Branch part 30 Branch pipe 31 Main body part 32 Connection part

Claims (3)

主管部と枝分かれ部を備え少なくとも前記枝分かれ部が硬質材からなる管本体と、
本体部と前記管本体の枝分かれ部に結合される結合部とを備える枝分かれ管と、
を有し、
前記枝分かれ管は、前記本体部が軟質材からなり前記結合部が硬質材からなる２色成形品である、枝分かれ管を備える管構造。 A pipe body comprising a main pipe part and a branch part, at least the branch part being made of a hard material;
A branch pipe comprising a main body part and a coupling part coupled to the branch part of the pipe body;
Have
The said branch pipe is a pipe structure provided with the branch pipe which is a 2 color molded product in which the said main-body part consists of a soft material, and the said connection part consists of a hard material. 前記管本体は３次元エクスチェンジブロー成形品である請求項１記載の枝分かれ管を備える管構造。   The pipe structure having a branch pipe according to claim 1, wherein the pipe body is a three-dimensional exchange blow molded product. 前記管本体の枝分かれ部の内径は前記枝分かれ管側にいくにしたがって小とされている請求項１記載の枝分かれ管を備える管構造。
The pipe structure having a branch pipe according to claim 1, wherein an inner diameter of the branch portion of the pipe body is made smaller toward the branch pipe side.
JP2004295641A 2004-10-08 2004-10-08 Pipe structure including branching pipe Pending JP2006105342A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50104221U (en) * 1974-01-30 1975-08-27
JPS53163722U (en) * 1977-05-31 1978-12-21
JPH0269218A (en) * 1988-09-05 1990-03-08 Inoue Mtp Co Ltd Insert blow molding method
JPH03279741A (en) * 1990-03-27 1991-12-10 Tanizawa Seisakusho:Kk Air pipe with branch pipe
JPH05245913A (en) * 1991-03-30 1993-09-24 Excel Kk Manufacture of hollow molded product
JPH08230066A (en) * 1995-02-23 1996-09-10 Rp Topla Ltd Method and apparatus for producing pipe fitted with branch part
JPH11336624A (en) * 1998-05-26 1999-12-07 Fuji Heavy Ind Ltd Duct and manufacture of the same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50104221U (en) * 1974-01-30 1975-08-27
JPS53163722U (en) * 1977-05-31 1978-12-21
JPH0269218A (en) * 1988-09-05 1990-03-08 Inoue Mtp Co Ltd Insert blow molding method
JPH03279741A (en) * 1990-03-27 1991-12-10 Tanizawa Seisakusho:Kk Air pipe with branch pipe
JPH05245913A (en) * 1991-03-30 1993-09-24 Excel Kk Manufacture of hollow molded product
JPH08230066A (en) * 1995-02-23 1996-09-10 Rp Topla Ltd Method and apparatus for producing pipe fitted with branch part
JPH11336624A (en) * 1998-05-26 1999-12-07 Fuji Heavy Ind Ltd Duct and manufacture of the same

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