JP5477663B2

JP5477663B2 - duct

Info

Publication number: JP5477663B2
Application number: JP2011072137A
Authority: JP
Inventors: 達哉田中; 晃鈴木
Original assignee: Toyoda Gosei Co Ltd
Current assignee: Toyoda Gosei Co Ltd
Priority date: 2011-03-29
Filing date: 2011-03-29
Publication date: 2014-04-23
Anticipated expiration: 2031-03-29
Also published as: JP2012207557A

Description

本発明は、車両用の吸気ダクト等のダクトに関する。 The present invention relates to a duct such as an intake duct for a vehicle.

ダクトの一種として、複数の分割体が一体化されてなるものが知られている。この種のダクト（以下、分割型のダクトと呼ぶ）における分割体は、一般に、ダクトの軸線方向に分割されている。換言すると、分割型ダクトは、一般に、ダクトの周方向の一部と周方向の他の一部とを別体で形成し、組み付けられて一体化されたものである（例えば、特許文献１参照）。分割体の一つを第１分割体と呼び、分割体の他の一つを第２分割体と呼ぶ。 As a kind of duct, one in which a plurality of divided bodies are integrated is known. A divided body in this type of duct (hereinafter referred to as a divided type duct) is generally divided in the axial direction of the duct. In other words, the divided duct is generally formed by integrating a part of the circumferential direction of the duct and another part of the circumferential direction separately, and assembling them (for example, see Patent Document 1). ). One of the divided bodies is called a first divided body, and the other one of the divided bodies is called a second divided body.

第１分割体と第２分割体とは、嵌合等の方法で組み付け時に固定するか、組み付け時に一旦仮止めしておき、その後に溶着や接着等の方法で固定するのが一般的である。特許文献１に紹介されている分割型ダクトにおいては、第１分割体と第２分割体とを組み付け時に爪嵌合している。この方法によると、第１分割体と第２分割体との組み付けと固定とを同時に行うことができる。 The first divided body and the second divided body are generally fixed at the time of assembly by a method such as fitting, or temporarily fixed at the time of assembly, and then fixed by a method such as welding or adhesion. . In the divided duct introduced in Patent Document 1, the first divided body and the second divided body are nail-fitted when assembled. According to this method, the first divided body and the second divided body can be assembled and fixed simultaneously.

ところで、第１分割体および／又は第２分割体が通気性部材である場合には、第１分割体と第２分割体とを組み付ける際に、互いの形状および組み付け位置を調整する必要がある。通気性部材は変形し易いためである。このため、例えば特許文献１に紹介されているダクトにおいては、爪嵌合する際に、第１分割体と第２分割体とを互いに対応する形状に整形しつつ、互いの組付け位置を位置決めする必要があり、組み付け作業が非常に煩雑であった。また、例えば、通気性部材は比較的変形し易いため、第１分割体と第２分割体とを互いに位置決めしつつ爪嵌合させる作業は困難であった。また、例えば特許文献１の図９に示されているように、通気性部材である第１分割体に凸状の嵌合爪を設け、非通気性部材である第２分割体に凹状の嵌合溝を設けて、嵌合爪を嵌合溝にスライド係合させる組み付け方法も考えられる。しかしこの場合には、直管状のダクトに適用し易く、湾曲形状のダクトに適用できない課題があった。 By the way, when a 1st division body and / or a 2nd division body are breathable members, when assembling a 1st division body and a 2nd division body, it is necessary to adjust a mutual shape and an assembly position. . This is because the breathable member is easily deformed. For this reason, for example, in the duct introduced in Patent Document 1, when the claws are fitted, the first divided body and the second divided body are shaped into shapes corresponding to each other, and the respective assembly positions are positioned. The assembly work was very complicated. Further, for example, since the air-permeable member is relatively easily deformed, it is difficult to perform the claw fitting while positioning the first divided body and the second divided body. For example, as shown in FIG. 9 of Patent Document 1, a convex fitting claw is provided on the first divided body that is a breathable member, and a concave fitting is fitted on the second divided body that is a non-breathable member. An assembly method in which a fitting groove is provided and the fitting claw is slidably engaged with the fitting groove is also conceivable. However, in this case, there is a problem that it can be easily applied to a straight tubular duct and cannot be applied to a curved duct.

したがって、組み付け作業が容易であり、かつ、第１分割体および第２分割体の形状、および組付け位置を容易に調整できる分割型のダクトが望まれている。 Therefore, there is a demand for a split-type duct that can be easily assembled and that can easily adjust the shapes and assembly positions of the first and second divided bodies.

特開２００９−１６７９４５号公報JP 2009-167945 A

本発明は上記事情に鑑みてなされたものであり、第１分割体および第２分割体の形状、および組付け位置を容易に調整でき、組み付け作業が容易な分割型のダクトを提供することを目的とする。 The present invention has been made in view of the above circumstances, and it is possible to easily adjust the shapes and assembly positions of the first divided body and the second divided body, and to provide a divided duct that can be easily assembled. Objective.

上記課題を解決する本発明のダクトは、少なくとも２つの分割体が一体化されてなる筒状のダクトであって、
該分割体の１つである第１分割体は、非通気性部材であり、該ダクトの軸線方向の少なくとも一部において該ダクトの周方向の一部を構成し、
該分割体の他の１つである第２分割体は、通気性部材であり、該ダクトの軸線方向の少なくとも一部において該ダクトの周方向の他の一部を構成し、
該第１分割体は、該ダクトの周壁を構成する第１周壁部と、該第１周壁部の一対の周方向端部の少なくとも一方に一体に形成され該ダクトの外側に向けて突出する第１取付部と、該第１取付部の先端部に一体に形成され該第１取付部と交差する方向に延び該第１取付部よりもさらに該ダクトの外側に突出する第１フランジ部と、を持ち、
該第２分割体は、該ダクトの周壁を構成する第２周壁部と、該第２周壁部の一対の周方向端部の少なくとも一方に一体に形成され該第２周壁部の外周面側に折り返された形状をなす第２取付部と、該第２取付部の先端部に一体に形成され該第２取付部と交差する方向に延び該第２取付部よりもさらに該ダクトの外側に突出する第２フランジ部と、を持ち、
該第１分割体と該第２分割体とを組み付けた組み付け状態において、
該第２取付部のなかで該第２周壁部の内周面に連続する第２内側面は、該第１取付部のなかで該第１周壁部の内周面に連続する第１内側面に対面し、
該第２フランジ部の少なくとも一部は該第１フランジ部と当接し接合されていることを特徴とする。 The duct of the present invention that solves the above problems is a cylindrical duct formed by integrating at least two divided bodies,
The first divided body, which is one of the divided bodies, is a non-breathable member, and constitutes a part of the duct in the circumferential direction in at least a part of the axial direction of the duct,
The second divided body, which is another one of the divided bodies, is a breathable member, and constitutes another part of the duct in the circumferential direction at least in the axial direction of the duct,
The first divided body is formed integrally with at least one of a first peripheral wall portion constituting the peripheral wall of the duct and a pair of circumferential end portions of the first peripheral wall portion, and protrudes toward the outside of the duct. A first flange portion that is integrally formed at a distal end portion of the first attachment portion, extends in a direction intersecting with the first attachment portion, and protrudes further to the outside of the duct than the first attachment portion; Have
The second divided body is formed integrally with at least one of a second peripheral wall portion constituting the peripheral wall of the duct and a pair of circumferential end portions of the second peripheral wall portion, and is formed on the outer peripheral surface side of the second peripheral wall portion. A second mounting portion having a folded shape, and is formed integrally with the distal end portion of the second mounting portion and extends in a direction crossing the second mounting portion, and further protrudes outside the duct from the second mounting portion. A second flange portion to be
In the assembled state in which the first divided body and the second divided body are assembled,
The second inner surface that is continuous with the inner peripheral surface of the second peripheral wall portion in the second mounting portion is the first inner surface that is continuous with the inner peripheral surface of the first peripheral wall portion in the first mounting portion. Face to face
At least a part of the second flange portion is in contact with and joined to the first flange portion.

本発明のダクトは、下記の（１）〜（４）の何れかを備えるのが好ましく、（１）〜（４）の複数を備えるのがより好ましい。
（１）前記組み付け状態において、前記第２取付部は前記第１取付部に弾接する。
（２）前記第１取付部は、突出端側の部分である一般壁と、第１周壁部の周方向先端と該一般壁との間に介在する基底壁と、を持ち、
前記組み付け状態において、前記第２周壁部の周方向先端と該基底壁とは、突き合わせられている。
（３）前記第１取付部は、前記第２周壁部と前記第２取付部との境界部分に対面する位置に、突起状のシール凸部を持ち、
前記組み付け状態において、該シール凸部は該境界部分に圧接する。
（４）前記第１内側面のなかで突出端部側に位置するテーパ面は、前記第１取付部の突出端部側から基部側に向けて、前記ダクトの径方向外側から径方向内側に傾斜する。 The duct of the present invention preferably includes any one of the following (1) to (4), and more preferably includes a plurality of (1) to (4).
(1) In the assembled state, the second attachment portion elastically contacts the first attachment portion.
(2) The first mounting portion has a general wall that is a portion on the protruding end side, and a base wall that is interposed between the circumferential tip of the first peripheral wall portion and the general wall,
In the assembled state, the circumferential tip of the second peripheral wall portion and the base wall are butted.
(3) The first mounting portion has a projecting seal convex portion at a position facing a boundary portion between the second peripheral wall portion and the second mounting portion,
In the assembled state, the seal convex portion is in pressure contact with the boundary portion.
(4) The taper surface located on the protruding end side in the first inner surface is from the radially outer side to the radially inner side of the duct from the protruding end side to the base side of the first mounting portion. Tilt.

本発明のダクトによると、第１分割体を第２分割体に合う形状に容易に整形でき、かつ、第１分割体の第２分割体に対する組み付け位置を容易に位置決めできる。このため、本発明のダクトによると、第１分割体と第２分割体とを容易に組み付けることができる。 According to the duct of the present invention, the first divided body can be easily shaped into a shape suitable for the second divided body, and the assembly position of the first divided body with respect to the second divided body can be easily positioned. For this reason, according to the duct of this invention, a 1st division body and a 2nd division body can be assembled | attached easily.

実施例１のダクトを模式的に表す斜視図である。FIG. 3 is a perspective view schematically illustrating a duct according to the first embodiment. 実施例１のダクトを模式的に表す分解斜視図である。FIG. 3 is an exploded perspective view schematically illustrating the duct according to the first embodiment. 実施例１のダクトの径方向断面を模式的に表す断面図である。3 is a cross-sectional view schematically showing a radial cross section of a duct of Example 1. FIG. 図３の要部拡大断面図である。It is a principal part expanded sectional view of FIG. 実施例２のダクトを模式的に表す斜視図である。It is a perspective view showing the duct of Example 2 typically. 実施例２のダクトの径方向断面を模式的に表す断面図である。6 is a cross-sectional view schematically showing a radial cross section of a duct of Example 2. FIG. 実施例３のダクトの径方向断面を模式的に表す断面図である。6 is a cross-sectional view schematically illustrating a radial cross section of a duct of Example 3. FIG. 実施例４のダクトの径方向断面を模式的に表す断面図である。6 is a cross-sectional view schematically showing a radial cross section of a duct of Example 4. FIG. 実施例５のダクトを模式的に表す斜視図である。FIG. 10 is a perspective view schematically showing a duct of Example 5. 実施例６のダクトの径方向断面を模式的に表す断面図である。10 is a cross-sectional view schematically showing a radial cross section of a duct of Example 6. FIG.

本発明のダクトにおける第２分割体は、弾性変形可能な通気性部材からなる。ここでいう通気性部材とは、気体の流通が可能な材料を指す。このため、第２分割体としては、樹脂、ゴム、エラストマー等の弾性変形可能な材料からなり、かつ、織布状、不織布状、連泡型の発泡体状等の、成形時または成形後に通孔が形成された多孔材状をなせば良い。一方、本発明のダクトにおける第１分割体は、非通気性部材からなる。ここでいう非通気性部材とは、気体が流通しない（または気体が殆ど流通しない）材料を指す。第１分割体の材料は、第２分割体に比べて変形し難く、かつ、気体の流通を妨げる材料であれば良い。具体的には、ポリプロピレン（ＰＰ）、ポリエチレン（ＰＥ）等が挙げられる。 The 2nd division body in the duct of this invention consists of a breathable member which can be elastically deformed. Here, the air-permeable member refers to a material capable of flowing gas. For this reason, the second divided body is made of an elastically deformable material such as resin, rubber, or elastomer, and is passed during or after molding, such as woven fabric, nonwoven fabric, or open-cell foam. What is necessary is just to make the shape of the porous material in which the hole was formed. On the other hand, the 1st division body in the duct of this invention consists of a non-breathable member. As used herein, the non-breathable member refers to a material in which gas does not flow (or gas hardly flows). The material of the first divided body may be any material that is less likely to be deformed than the second divided body and that obstructs gas flow. Specific examples include polypropylene (PP) and polyethylene (PE).

本発明のダクトは、第１分割体および第２分割体のみで構成しても良いし、その他の分割体をさらに組み合わせても良い。 The duct of the present invention may be constituted by only the first divided body and the second divided body, or may be further combined with other divided bodies.

以下、具体例を挙げて、本発明を説明する。 Hereinafter, the present invention will be described with specific examples.

（実施例１）
実施例１のダクトを模式的に表す斜視図を図１に示す。実施例１のダクトを模式的に表す分解斜視図を図２に示す。実施例１のダクトの径方向断面を模式的に表す断面図を図３に示す。図３の要部拡大断面図を図４に示す。以下、実施例において、上、下、左、右、前、後とは図１に示す上、下、左、右、前、後を指す。さらに、特に断りのない場合、周方向、軸線方向とは、ダクト（より厳密には後述するダクト本体）の周方向、軸線方向を指す。 Example 1
A perspective view schematically showing the duct of the first embodiment is shown in FIG. FIG. 2 is an exploded perspective view schematically showing the duct of the first embodiment. FIG. 3 is a cross-sectional view schematically showing a radial cross section of the duct of the first embodiment. FIG. 4 shows an enlarged cross-sectional view of the main part of FIG. Hereinafter, in the embodiments, the terms “up”, “down”, “left”, “right”, “front”, and “rear” refer to “upper, lower, left, right, front, and rear” shown in FIG. Further, unless otherwise specified, the circumferential direction and the axial direction refer to the circumferential direction and the axial direction of a duct (more precisely, a duct body described later).

図１に示すように、実施例１のダクトは湾曲筒状であり、第１分割体１と第２分割体２とで構成されている。第１分割体１はＰＰを材料とし射出成形されたものである。第２分割体２はポリエチレンテレフタレート（ＰＥＴ）製の不織布を賦形したものである。すなわち、第２分割体２は多孔材からなる通気性部材であり、第１分割体１は無孔材からなる非通気性部材である。 As shown in FIG. 1, the duct of Example 1 has a curved cylindrical shape, and includes a first divided body 1 and a second divided body 2. The first divided body 1 is formed by injection molding using PP as a material. The second divided body 2 is obtained by shaping a nonwoven fabric made of polyethylene terephthalate (PET). That is, the second divided body 2 is a breathable member made of a porous material, and the first divided body 1 is a non-breathable member made of a nonporous material.

第１分割体１は、２つの分割体（上側体１ａ、下側体１ｂ）で構成され、ダクトの大部分を構成している。第２分割体２はダクトの軸線方向および周方向の一部のみを構成している。図１〜３に示すように、第１分割体１は、上下に２分割された分割体（上側体１ａ、下側体１ｂ）として射出成形され、溶着、爪嵌合等の方法により、継ぎ合わせ線１０で一体化されてなる。 The first divided body 1 is composed of two divided bodies (an upper body 1a and a lower body 1b) and constitutes most of the duct. The second divided body 2 constitutes only a part in the axial direction and the circumferential direction of the duct. As shown in FIGS. 1-3, the 1st division body 1 is injection-molded as a division body (the upper body 1a, the lower body 1b) divided into two up and down, and it joins by methods, such as welding and a nail | claw fitting. The mating line 10 is integrated.

図３に示すように、第１分割体１は、切り欠き筒状をなす第１周壁部３と、一対の第１取付部４（４ａ、４ｂ）と、一対の第１フランジ部５（５ａ、５ｂ）とを持つ。第１周壁部３はダクトの周壁を構成する部分であり、後述する第２周壁部６とともに筒状をなすダクト本体９８を構成する。第１取付部４は後述する第２取付部７（７ａ、７ｂ）とともに第１分割体１と第２分割体２との組み付けに関与する部分である。第１フランジ部５もまた、後述する第２フランジ部８（８ａ、８ｂ）とともに第１分割体１と第２分割体２との組み付けに関与する部分である。 As shown in FIG. 3, the first divided body 1 includes a first peripheral wall portion 3 having a notched cylindrical shape, a pair of first mounting portions 4 (4a, 4b), and a pair of first flange portions 5 (5a). 5b). The 1st surrounding wall part 3 is a part which comprises the surrounding wall of a duct, and comprises the duct main body 98 which makes | forms a cylindrical shape with the 2nd surrounding wall part 6 mentioned later. The 1st attachment part 4 is a part which is concerned with the assembly | attachment of the 1st division body 1 and the 2nd division body 2 with the 2nd attachment part 7 (7a, 7b) mentioned later. The 1st flange part 5 is also a part concerned in the assembly | attachment of the 1st division body 1 and the 2nd division body 2 with the 2nd flange part 8 (8a, 8b) mentioned later.

図２に示すように、上側体１ａには窓状の開口１１が設けられている。第２分割体２は、この開口１１に組み付けられる。開口１１の左端と右端とには、それぞれ、第１取付部４ａ、４ｂが一体に形成されている。詳しくは、一方の第１取付部４ａは、開口１１の左側周縁部を構成する第１周壁部３の左端（周方向の一端）に一体に形成され、上方に突出する立壁状をなす。他方の第１取付部４ｂは、開口１１の右側周縁部を構成する第１周壁部３の右端（周方向の他端）に一体に形成され、ダクトの上方に突出する立壁状をなす。一対の第１取付部４ａ、４ｂは、略対称形状である。 As shown in FIG. 2, a window-like opening 11 is provided in the upper body 1a. The second divided body 2 is assembled to the opening 11. First attachment portions 4a and 4b are integrally formed at the left end and the right end of the opening 11, respectively. Specifically, one first mounting portion 4a is formed integrally with the left end (one end in the circumferential direction) of the first peripheral wall portion 3 constituting the left peripheral portion of the opening 11, and has a standing wall shape protruding upward. The other first mounting portion 4b is formed integrally with the right end (the other end in the circumferential direction) of the first peripheral wall portion 3 constituting the right peripheral edge portion of the opening 11 and has a standing wall shape protruding above the duct. The pair of first mounting portions 4a and 4b are substantially symmetrical.

一対の第１取付部４ａ、４ｂは、一対の第１遮蔽壁１５ａ、１５ｂによって連結されている。詳しくは、各第１遮蔽壁１５ａ、１５ｂは、第１周壁部３のなかで開口１１の軸線方向周縁部を構成する２つの端部（前端または後端）にそれぞれ一体化され、この端部の周方向に延在し、上方に突出する立壁状をなす。一対の第１取付部４ａ、４ｂは、この第１遮蔽壁１５ａ、１５ｂによって、軸線方向の２端で連結されている。 The pair of first mounting portions 4a and 4b are connected by a pair of first shielding walls 15a and 15b. Specifically, each of the first shielding walls 15a and 15b is integrated with two ends (front end or rear end) constituting the peripheral edge of the opening 11 in the first peripheral wall portion 3, respectively. It extends in the circumferential direction, and forms a standing wall shape protruding upward. The pair of first mounting portions 4a and 4b are connected to each other at two ends in the axial direction by the first shielding walls 15a and 15b.

第１フランジ部５ａ、５ｂは、第１取付部４ａ、４ｂの突出端４９に一体に形成され、第１取付部４ａと交差する方向（左方または右方）に突出している。各第１フランジ部５ａ、５ｂの突出端５９は、第１取付部４ａ、４ｂの突出端４９よりもさらにダクトの外側に位置している。換言すると、ダクトの径方向断面において、第１フランジ部５の突出端５９とダクトの軸心Ｏ₀との距離は、第１取付部４の突出端４９とダクトの軸心Ｏ₀との距離よりも大きい（図３）。図２に示すように、一対の第１フランジ部５ａ、５ｂは、一対の第１連結フランジ１６ａ、１６ｂによって連結されている。第１連結フランジ１６ａ、１６ｂはそれぞれ対応する第１遮蔽壁１５ａ、１５ｂの突出端に一体に形成され、前方または後方に突出している。 The first flange portions 5a and 5b are formed integrally with the projecting ends 49 of the first mounting portions 4a and 4b, and project in a direction (left or right) intersecting the first mounting portion 4a. The protruding ends 59 of the first flange portions 5a and 5b are located further outside the duct than the protruding ends 49 of the first mounting portions 4a and 4b. In other words, in the radial cross-section of the duct, the distance between the protruding end 59 of the first flange portion 5 and the axial center O _{0 of the} duct is the distance between the protruding end 49 of the first mounting portion 4 and the axial center O _{0 of the} duct. Larger than (Fig. 3). As shown in FIG. 2, the pair of first flange portions 5a and 5b are connected by a pair of first connection flanges 16a and 16b. The first connecting flanges 16a and 16b are integrally formed at the protruding ends of the corresponding first shielding walls 15a and 15b, respectively, and protrude forward or rearward.

図４に示すように、実施例１のダクトにおける第１取付部４ａは、一般壁４０と基底壁４１とを持つ。一般壁４０は第１取付部４ａの突出端４９側の部分であり、基底壁４１は第１取付部４ａの基部４３側の部分である。具体的には、基部４３は、第１取付部４ａ、４ｂにおける第１周壁部３との境界部分である。基底壁４１は、基部４３を含み、第１周壁部３の周方向先端（左端）と一般壁４０との間に介在する部分である。基底壁４１は、上方かつ径方向外方に傾斜している。一般壁４０は、基底壁４１の上側に連続し、上下方向に延びる部分である。第１取付部４ｂについても同様である。 As shown in FIG. 4, the first attachment portion 4 a in the duct of the first embodiment has a general wall 40 and a base wall 41. The general wall 40 is a portion on the protruding end 49 side of the first mounting portion 4a, and the base wall 41 is a portion on the base 43 side of the first mounting portion 4a. Specifically, the base portion 43 is a boundary portion with the first peripheral wall portion 3 in the first attachment portions 4a and 4b. The base wall 41 is a part including the base 43 and interposed between the circumferential tip (left end) of the first peripheral wall 3 and the general wall 40. The base wall 41 is inclined upward and radially outward. The general wall 40 is a portion that continues to the upper side of the base wall 41 and extends in the vertical direction. The same applies to the first attachment portion 4b.

第１内側面４２は、第１取付部４ａの基底壁４１の内側面を構成する部分（底内面４５）と、第１取付部４ａの突出端部の内面を構成する部分（端内面４６）と、一般壁４０の内面を構成する部分（一般内面４７、底内面４５と端内面４６との間の部分）と、を持つ。第１取付部４ａの底内面４５には、突起状のシール凸部４８が形成されている。シール凸部４８は、組み付け状態において、第２周壁部６と第２取付部７との境界部分（折り返し部７０）に対面する。第１取付部４ｂについても同様である。 The first inner side surface 42 includes a portion constituting the inner side surface of the base wall 41 of the first mounting portion 4a (bottom inner surface 45) and a portion constituting the inner surface of the protruding end portion of the first mounting portion 4a (end inner surface 46). And a portion constituting the inner surface of the general wall 40 (a general inner surface 47, a portion between the bottom inner surface 45 and the end inner surface 46). On the bottom inner surface 45 of the first mounting portion 4a, a projecting seal convex portion 48 is formed. The seal convex part 48 faces the boundary part (folded part 70) between the second peripheral wall part 6 and the second attachment part 7 in the assembled state. The same applies to the first attachment portion 4b.

端内面４６は、図４に示すように、ダクトの径方向外側上方から径方向内側下方に向けて傾斜するテーパ面４６ａと、テーパ面４６ａよりも上側（突出端４９側）に位置し上下方向に延びる一般端面４６ｂとを持つ。このため端内面４６は、一般内面４７に比べて、ダクトの径方向外側に段差状にずれている。 As shown in FIG. 4, the end inner surface 46 is a tapered surface 46 a that is inclined from the radially outer upper side to the radially inner lower side of the duct, and is positioned above the tapered surface 46 a (the protruding end 49 side) and in the vertical direction. And a general end face 46b extending in the direction. For this reason, the end inner surface 46 is displaced in a stepped manner on the outer side in the radial direction of the duct as compared with the general inner surface 47.

図２に示すように、第２分割体２は、略半割筒状をなす第２周壁部６と、一対の第２取付部７（７ａ、７ｂ）と、一対の第２フランジ部８（８ａ、８ｂ）とを持つ。第２周壁部６はダクトの周壁を構成する部分である。一対の第２取付部７ａ、７ｂは、第２周壁部６に一体に形成されている。詳しくは、一方の第２取付部７ａは、第２周壁部６の左端に一体に形成され、この左端から第２周壁部６の外周面６１側すなわちダクトの上方に折り返された形状をなす。他方の第２取付部７ｂは、第２周壁部６の右端に一体に形成され、この右端から第２周壁部６の外周面６１側すなわちダクトの上方に折り返された形状をなす。一対の第２取付部７ａ、７ｂは、略対称形状である。 As shown in FIG. 2, the second divided body 2 includes a second peripheral wall portion 6 having a substantially halved cylindrical shape, a pair of second mounting portions 7 (7a, 7b), and a pair of second flange portions 8 ( 8a, 8b). The 2nd surrounding wall part 6 is a part which comprises the surrounding wall of a duct. The pair of second attachment portions 7 a and 7 b are formed integrally with the second peripheral wall portion 6. Specifically, one second mounting portion 7a is formed integrally with the left end of the second peripheral wall portion 6, and has a shape folded from the left end toward the outer peripheral surface 61 side of the second peripheral wall portion 6, that is, above the duct. The other second mounting portion 7b is formed integrally with the right end of the second peripheral wall portion 6, and has a shape folded from the right end toward the outer peripheral surface 61 side of the second peripheral wall portion 6, that is, above the duct. The pair of second attachment portions 7a and 7b are substantially symmetrical.

図２に示すように、一対の第２取付部７ａ、７ｂは一対の第２遮蔽壁２５ａ、２５ｂによって連結されている。詳しくは、各第２遮蔽壁２５ａ、２５ｂは、第２周壁部３の２つの軸線方向端部（前端または後端）にそれぞれ一体化され、この端部の周方向に延在し、上方に突出する立壁状をなす。一対の第２取付部７ａ、７ｂは、この第２遮蔽壁２５ａ、２５ｂによって、軸線方向の２端で連結されている。 As shown in FIG. 2, the pair of second mounting portions 7a and 7b are connected by a pair of second shielding walls 25a and 25b. Specifically, each of the second shielding walls 25a and 25b is respectively integrated with two axial end portions (front end or rear end) of the second peripheral wall portion 3, extends in the circumferential direction of the end portion, and upwards. Forms a protruding standing wall. The pair of second mounting portions 7a and 7b are connected at two ends in the axial direction by the second shielding walls 25a and 25b.

図３、４に示すように、一方の第２フランジ部８ａは、第２取付部７ａの突出端７９に一体に形成され、第２取付部７ａと交差する方向（左方）に突出している。他方の第２フランジ部８ｂは、第２取付部７ｂの突出端７９に一体に形成され、第２取付部７ｂと交差する方向（右方）に突出している。また、各第２フランジ部８ａ、８ｂの突出端８９は第２取付部７ａ、７ｂの突出端７９よりもさらにダクトの外側に位置している。換言すると、ダクトの径方向断面において、第２フランジ部８の突出端８９とダクトの軸心Ｏ₀との距離は、第２取付部７の突出端７９とダクトの軸心Ｏ₀との距離よりも大きい。図２に示すように、一対の第２フランジ部８ａ、８ｂは、一対の第２連結フランジ２６ａ、２６ｂによって連結されている。第２連結フランジ２６ａ、２６ｂはそれぞれ対応する第２遮蔽壁２５ａ、２５ｂの突出端に一体に形成され、前方または後方に突出している。 As shown in FIGS. 3 and 4, one second flange portion 8 a is formed integrally with the protruding end 79 of the second mounting portion 7 a and protrudes in a direction (leftward) intersecting the second mounting portion 7 a. . The other second flange portion 8b is formed integrally with the protruding end 79 of the second attachment portion 7b and protrudes in the direction (rightward) intersecting the second attachment portion 7b. Further, the protruding ends 89 of the second flange portions 8a and 8b are located further outside the duct than the protruding ends 79 of the second mounting portions 7a and 7b. In other words, in the radial cross section of the duct, the distance between the protruding end 89 of the second flange portion 8 and the axial center O _{0 of the} duct is the distance between the protruding end 79 of the second mounting portion 7 and the axial center O _{0 of the} duct. Bigger than. As shown in FIG. 2, the pair of second flange portions 8a and 8b are connected by a pair of second connection flanges 26a and 26b. The second connecting flanges 26a and 26b are formed integrally with the protruding ends of the corresponding second shielding walls 25a and 25b, respectively, and protrude forward or backward.

以下、実施例のダクトを組み付ける手順を説明する。第１分割体１および第２分割体２の組み付け前の状態を組み付け前状態と呼び、第１分割体１および第２分割体２の組み付けられた後の状態を組み付け状態と呼ぶ。 The procedure for assembling the duct according to the embodiment will be described below. The state before the first divided body 1 and the second divided body 2 are assembled is called a pre-assembled state, and the state after the first divided body 1 and the second divided body 2 are assembled is called an assembled state.

第２分割体２と第１分割体１とを組み付ける際には、第２分割体２を上方から第１分割体１に近づけ、第２取付部７の第２内側面７１（図４に示す）を第１取付部４の第１内側面４２に対面させつつ、第２取付部７を第１取付部４の内側に差し込む。このとき、第２フランジ部８が第１フランジ部５と当接する。また、第２取付部７の第２内側面７１は第１取付部４の第１内側面４２に当接する。第２分割体２の外形を第１分割体１の開口１１よりも少し大きめに形成し、組み付け時に第１分割体１に圧接させることで、第２分割体２の第１分割体１に対する保持性、及び、第１分割体１と第２分割体とのシール性が向上する。 When the second divided body 2 and the first divided body 1 are assembled, the second divided body 2 is brought close to the first divided body 1 from above, and the second inner surface 71 of the second mounting portion 7 (shown in FIG. 4). The second mounting portion 7 is inserted into the first mounting portion 4 while facing the first inner surface 42 of the first mounting portion 4. At this time, the second flange portion 8 contacts the first flange portion 5. Further, the second inner side surface 71 of the second mounting portion 7 abuts on the first inner side surface 42 of the first mounting portion 4. The outer shape of the second divided body 2 is formed to be slightly larger than the opening 11 of the first divided body 1, and the second divided body 2 is held against the first divided body 1 by being brought into pressure contact with the first divided body 1 during assembly. And the sealing performance between the first divided body 1 and the second divided body are improved.

第２分割体２は通気性部材であり比較的変形し易いため、成形時および／または組み付け時に変形している場合がある。しかし、第１分割体１は非通気性部材であり変形し難い。このため、第２フランジ部８が第１フランジ部５と当接し、第２取付部７が第１取付部４と当接することによって、第２分割体２は第１分割体１に沿った形状に整形され、形状保持される。 Since the second divided body 2 is a breathable member and is relatively easily deformed, it may be deformed during molding and / or assembly. However, the first divided body 1 is a non-breathable member and is not easily deformed. For this reason, when the second flange portion 8 abuts on the first flange portion 5 and the second attachment portion 7 abuts on the first attachment portion 4, the second divided body 2 is shaped along the first divided body 1. Shaped and held in shape.

上述したように第２分割体２は比較的変形し易いため、整形した形状を保持しつつ第１分割体１に対して位置決めするのは困難である。しかし、第２フランジ部８によって第１フランジ部５の位置決めをし、かつ、第１取付部４によって第２取付部７の位置決めをすることで、第２分割体２の形状を第１分割体１に沿った形状に容易に整形できる。このため、実施例１のダクトによると、第１分割体１と第２分割体２とを容易に組み付けることができる。 As described above, since the second divided body 2 is relatively easily deformed, it is difficult to position the second divided body 1 with respect to the first divided body 1 while maintaining the shaped shape. However, by positioning the first flange portion 5 with the second flange portion 8 and positioning the second attachment portion 7 with the first attachment portion 4, the shape of the second divided body 2 is changed to the first divided body. It can be easily shaped into a shape along 1. For this reason, according to the duct of Example 1, the 1st division body 1 and the 2nd division body 2 can be assembled | attached easily.

また、組み付け状態において、底内面４５は折り返し部７０に当接する。このため第１分割体１と第２分割体２との隙間は底内面４５と折り返し部７０とによって容易かつ信頼性高くシールされる。さらにシール凸部４８が折り返し部７０に当接することで、第１分割体１と第２分割体２との隙間はさらに信頼性の高くシールされる。 In the assembled state, the bottom inner surface 45 abuts on the folded portion 70. Therefore, the gap between the first divided body 1 and the second divided body 2 is easily and reliably sealed by the bottom inner surface 45 and the folded portion 70. Further, when the seal convex portion 48 abuts on the folded portion 70, the gap between the first divided body 1 and the second divided body 2 is sealed with higher reliability.

さらに、図３、４に示すように、組み付け状態において、ダクト本体９８の外周面に連続する第２取付部７の第２外側面７２は、第１取付部４と接触しておらず解放されている。このため、組み付け状態において、第１フランジ部５は第２フランジ部８を部分的に拘束するだけであり、第１取付部４は第２取付部７を部分的に拘束するだけである。このため、第２フランジ部８および第２取付部７は、組み付け時にも上側（第１取付部４の反対側）には変位可能であり、第１分割体１および第２分割体２の寸法誤差を吸収できる。したがって、実施例１のダクトは、組み付け時に第２分割体２を第１分割体１に沿った形状に容易に整形でき、第１分割体１と第２分割体２とを容易に組み付けることができる。 Further, as shown in FIGS. 3 and 4, in the assembled state, the second outer surface 72 of the second mounting portion 7 that is continuous with the outer peripheral surface of the duct main body 98 is not in contact with the first mounting portion 4 and is released. ing. For this reason, in the assembled state, the first flange portion 5 only partially restrains the second flange portion 8, and the first attachment portion 4 only restrains the second attachment portion 7 partially. For this reason, the 2nd flange part 8 and the 2nd attachment part 7 can be displaced to the upper side (opposite side of the 1st attachment part 4) also at the time of an assembly, The dimension of the 1st division body 1 and the 2nd division body 2 It can absorb errors. Therefore, the duct of Example 1 can easily shape the second divided body 2 into a shape along the first divided body 1 when assembled, and can easily assemble the first divided body 1 and the second divided body 2. it can.

なお、第２取付部７の第２外側面７２が解放されていれば、上記したように第１分割体１と第２分割体２との寸法誤差を吸収できる。このため、組み付け状態において、第２フランジ部８と第１フランジ部５とを接合する際にも、第２分割体２が第１分割体１に対して位置ズレすることはない。 In addition, if the 2nd outer side surface 72 of the 2nd attachment part 7 is open | released, as mentioned above, the dimensional error of the 1st division body 1 and the 2nd division body 2 can be absorbed. For this reason, even when the second flange portion 8 and the first flange portion 5 are joined in the assembled state, the second divided body 2 is not displaced with respect to the first divided body 1.

また、第２分割体２の前後端（軸線方向の端部）においても、ダクト本体９８の内部形状に大きな段差ができないため、圧損増大を抑制できる。 In addition, even at the front and rear ends (ends in the axial direction) of the second divided body 2, a large step cannot be formed in the internal shape of the duct body 98, so that an increase in pressure loss can be suppressed.

さらに、実施例１のダクトにおいて、第１周壁部３と第２周壁部６とは、軸心Ｏ₀を中心とする略同一円弧状に存在する。このため、実施例１のダクトは、空気の流通を阻害し難く、圧損増大を抑制できる。また、乱流や異音の発生を抑制できる。これは、〔１〕第２取付部７を第２周壁部６の外周面６１側に折り返した形状にして、第１取付部４と第２取付部７との係止部分を、ダクト本体９８（すなわち、第１周壁部３と第２周壁部６とからなる筒状の部分）よりも外側に配置したこと、〔２〕組み付け状態において、基底部４１と第２周壁部６の周方向端面とを突き合わせたこと、に起因する。組み付け状態において、基底部４１と第２周壁部６の周方向端面とを突き合わせたことで、第１周壁部３の左端面と第２周壁部６の左端面とがほぼ突き合わせ、かつ、第１周壁部３の右端面と第２周壁部６の右端面とがほぼ突き合わせることができ、第１周壁部３と第２周壁部６とを略同一円弧状に配置できる。なお、第２取付部７は、図４に示すように、厳密に「第２周壁部６の先端を中心として」折り返されたものに限らない。例えば第２周壁部６の先端部すなわち先端近傍が折り返し点であっても良い。また、例えば、第２取付部７は、２以上の複数箇所に折り返し点が形成されるよう、多段階で折り返しても良い。何れの場合にも、第１取付部４と第２取付部７との係止部分をダクト本体９８の外側にオフセットでき、この係止部分が空気流通を阻害することにより生じ得る問題（例えば圧損増大等）を解消または抑制できる。 Further, in the duct according to the first embodiment, the first peripheral wall portion 3 and the second peripheral wall portion 6 exist in substantially the same arc shape with the axis O ₀ as the center. For this reason, the duct of Example 1 can hardly suppress the air flow and can suppress an increase in pressure loss. Moreover, generation | occurrence | production of a turbulent flow and abnormal noise can be suppressed. This is because [1] the second mounting portion 7 is folded to the outer peripheral surface 61 side of the second peripheral wall portion 6, and the engaging portion between the first mounting portion 4 and the second mounting portion 7 is used as the duct body 98. (I.e., a cylindrical portion comprising the first peripheral wall portion 3 and the second peripheral wall portion 6), [2] circumferential end surfaces of the base portion 41 and the second peripheral wall portion 6 in the assembled state It is caused by having matched. In the assembled state, the base portion 41 and the circumferential end surface of the second peripheral wall portion 6 are abutted, so that the left end surface of the first peripheral wall portion 3 and the left end surface of the second peripheral wall portion 6 substantially abut each other, and the first The right end surface of the peripheral wall portion 3 and the right end surface of the second peripheral wall portion 6 can be almost abutted, and the first peripheral wall portion 3 and the second peripheral wall portion 6 can be arranged in substantially the same arc shape. As shown in FIG. 4, the second mounting portion 7 is not limited to the one that is strictly folded around “the front end of the second peripheral wall portion 6”. For example, the tip of the second peripheral wall 6, that is, the vicinity of the tip may be a turning point. Further, for example, the second attachment portion 7 may be folded back in multiple stages so that folding points are formed at two or more locations. In any case, the locking portion between the first mounting portion 4 and the second mounting portion 7 can be offset to the outside of the duct body 98, and this locking portion may cause problems that may occur when air flow is inhibited (for example, pressure loss). Increase or the like) can be eliminated or suppressed.

実施例１のダクトはシール凸部４８を持ち、シール凸部４８が折り返し部７０に当接することで、第１分割体１と第２分割体２との隙間を容易かつ信頼性高くシールできる。なお、シール性能を考慮すると、ダクトの軸線方向に沿って延びる長尺状のシール凸部４８を設けるのが好ましい。 The duct according to the first embodiment has the seal convex portion 48, and the seal convex portion 48 abuts against the folded portion 70, whereby the gap between the first divided body 1 and the second divided body 2 can be easily and reliably sealed. In consideration of the sealing performance, it is preferable to provide a long seal protrusion 48 extending along the axial direction of the duct.

また、実施例１のダクトにおいては、組み付け時に、第２取付部７ａ、７ｂの特に折り返し部７０がテーパ面４６ａおよび／または内壁面４７に案内される。このため実施例１のダクトにおける第１分割体１および第２分割体２は、より一層容易に組み付けられる。さらに、端内面４６が一般内面４７に比べてダクトの径方向外側に段差状にずれているために、第２取付部７と第２フランジ部８との連結部分は、組み付け時にも、第１取付部４と第１フランジ部５との連結部分（すなわち端内面４６）に干渉し難い。このことによっても、実施例１のダクトにおける第１分割体１と第２分割体２とは容易に組み付けられる。 In the duct according to the first embodiment, the folded portion 70 of the second mounting portions 7a and 7b is guided to the tapered surface 46a and / or the inner wall surface 47 during assembly. For this reason, the 1st division body 1 and the 2nd division body 2 in the duct of Example 1 are assembled | attached still more easily. Further, since the end inner surface 46 is displaced stepwise on the outer side in the radial direction of the duct as compared with the general inner surface 47, the connecting portion between the second mounting portion 7 and the second flange portion 8 is the first even when assembled. It is difficult to interfere with the connecting portion (that is, the end inner surface 46) between the mounting portion 4 and the first flange portion 5. Also by this, the 1st division body 1 and the 2nd division body 2 in the duct of Example 1 are assembled | attached easily.

上記のように第１分割体１と第２分割体２とを組み付けた後に、さらに、接着、溶着、カシメ等の既知の方法で第１フランジ部５と第２フランジ部８とを固着する。例えば、タッカー等の打鋲具を用い鋲やステープル等で固着しても良い。第１フランジ部５および第２フランジ部８は、フランジ状をなしダクト本体９８の外方に配置されている部分である。このような第１フランジ部５および第２フランジ部８を固着することで、第１分割体１と第２分割体２とを容易に固着できる。 After the first divided body 1 and the second divided body 2 are assembled as described above, the first flange portion 5 and the second flange portion 8 are further fixed by a known method such as adhesion, welding, or caulking. For example, it may be fixed with a scissors or staples using a striking tool such as a tucker. The first flange portion 5 and the second flange portion 8 are portions that are flanged and are disposed outside the duct body 98. By fixing the first flange portion 5 and the second flange portion 8 as described above, the first divided body 1 and the second divided body 2 can be easily fixed.

実施例１のダクトにおいては第１取付部４の突出する「ダクトの外方」が「ダクトの上方」であった。しかし第１取付部４は、ダクトの外周面よりもダクトの径方向外方に突出すれば良く、その突出方向は特に問わない。例えば、第２分割体２が第１分割体１よりも下側に配置される場合には、第１取付部４はダクトの下方に突出しても良い。 In the duct of Example 1, the “outside of the duct” protruding from the first mounting portion 4 was “above the duct”. However, the 1st attachment part 4 should just protrude in the radial direction outer side of a duct rather than the outer peripheral surface of a duct, and the protrusion direction in particular is not ask | required. For example, when the 2nd division body 2 is arrange | positioned below the 1st division body 1, the 1st attaching part 4 may protrude below the duct.

実施例１のダクトは略円筒状をなしたが、本発明のダクトは略角筒状をなしても良い。この場合、第１周壁部３および第２周壁部６は断面略円弧状をなさなくても良い。また、本発明のダクトにおける第１取付部４は、テーパ面４６ａ、端内面４６、基底壁４１、シール凸部４８を持たなくても良い。また、組み付け状態において第２取付部７が第１取付部４に当接しなくても良い。つまり、本発明のダクトにおいては、第２フランジ部８が第１フランジ部５に当接し接合されることで、第１分割体２は第２分割体１に対して位置決めされ、整形される。このため、上記の各部分を持たない場合や第２取付部７が第１取付部４に当接しない場合にも、本発明のダクトにおける第１分割体１と第２分割体とは容易に組み付けられる。また、第１フランジ部５と第２フランジ部８とがシール性高く接合する場合には、シール凸部４８を設けることなく第１分割体１と第２分割体２とをシール性高く組み付けることができる。 Although the duct of Example 1 has a substantially cylindrical shape, the duct of the present invention may have a substantially rectangular tube shape. In this case, the 1st surrounding wall part 3 and the 2nd surrounding wall part 6 do not need to make a cross-sectional substantially circular arc shape. Further, the first attachment portion 4 in the duct of the present invention may not have the tapered surface 46a, the end inner surface 46, the base wall 41, and the seal convex portion 48. Further, the second attachment portion 7 does not have to contact the first attachment portion 4 in the assembled state. That is, in the duct of the present invention, the second flange portion 8 is in contact with and joined to the first flange portion 5, whereby the first divided body 2 is positioned and shaped with respect to the second divided body 1. For this reason, the first divided body 1 and the second divided body in the duct of the present invention can be easily obtained even when the above-mentioned portions are not provided or when the second mounting portion 7 does not contact the first mounting portion 4. Assembled. Moreover, when the 1st flange part 5 and the 2nd flange part 8 join with high sealing performance, the 1st division body 1 and the 2nd division body 2 are assembled with high sealing performance without providing the seal convex part 48. Can do.

（実施例２）
実施例２のダクトは、第１分割体１と第２分割体とがそれぞれ略半割筒状をなすこと、、第１分割体１が第１遮蔽壁１５を持たないこと、第２分割体が第２遮蔽壁２５を持たないこと以外は実施例１のダクトとほぼ同じものである。実施例２のダクトを模式的に表す斜視図を図５に示す。実施例２のダクトを模式的に表す径方向断面図を図６に示す。 (Example 2)
In the duct of the second embodiment, the first divided body 1 and the second divided body each have a substantially halved cylindrical shape, the first divided body 1 does not have the first shielding wall 15, and the second divided body. Is substantially the same as the duct of the first embodiment except that the second shielding wall 25 is not provided. FIG. 5 is a perspective view schematically showing the duct of the second embodiment. A radial cross-sectional view schematically showing the duct of Example 2 is shown in FIG.

図５、６に示すように、第１分割体１はダクトの軸線方向に断面略一定であり、第２分割体２もまたダクトの軸線方向に断面略一定である。 As shown in FIGS. 5 and 6, the first divided body 1 has a substantially constant cross section in the axial direction of the duct, and the second divided body 2 also has a substantially constant cross section in the axial direction of the duct.

図６に示すように、組み付け前状態において、第２分割体２の一対の第２取付部７ａ、７ｂは、組み付け状態に比べて、ダクトの径方向外方に張り出している。換言すると、第２取付部７ａ、７ｂと第２周壁部６とのなす角は、組み付け状態よりも組み付け前状態の方がやや大きい。実施例２のダクトにおいて、第２分割体２を第１分割体１に組み付ける際には、先ず、第２取付部７ａ、７ｂをそれぞれ手でつまみ、折り返し部７０を中心として第２取付部７ａ、７ｂを軸心方向に揺動させる。このとき、第２分割体２（主に第２取付部７および折り返し部７０）は弾性変形し、弾力を蓄積する。 As shown in FIG. 6, in the state before assembly, the pair of second attachment portions 7a and 7b of the second divided body 2 protrude outward in the radial direction of the duct as compared with the assembly state. In other words, the angle formed by the second mounting portions 7a and 7b and the second peripheral wall portion 6 is slightly larger in the pre-assembly state than in the assembly state. In the duct of the second embodiment, when the second divided body 2 is assembled to the first divided body 1, first, the second mounting portions 7 a and 7 b are each pinched by hand, and the second mounting portion 7 a with the folded portion 70 as the center. , 7b are swung in the axial direction. At this time, the second divided body 2 (mainly the second attachment portion 7 and the folded portion 70) is elastically deformed and accumulates elasticity.

この状態の第２分割体２を第１分割体１に近づけ、第２取付部７の第２内側面７１を第１取付部４の第１内側面４２に対面させる。そして、第２取付部７から手を離すと、蓄積された弾力によって、第２取付部７は第１取付部４にそれぞれ弾接する。このとき、第２分割体２はまだ僅かに弾性変形している。すなわち、第２分割体２は、組み付け状態において、この弾力によって第１分割体１に圧接する。このため第２分割体２は第１分割体１に沿った形状に整形され、第１分割体１によって形状保持される。さらに、この弾性によって第２フランジ部８の大部分が第１フランジ部５に圧接する。このため第１分割体１と第２分割体２とは容易に組み付けられる。なお、実施例２のダクトにおいても、組み付け状態において、さらに、第２周壁部６の周方向端部と基底壁４１とが突き合わされ、第１周壁部３の周方向端部と第２周壁部６の周方向端部とがほぼ突き合わせられている。このため、実施例２のダクトもまた圧損が小さい。 The second divided body 2 in this state is brought close to the first divided body 1, and the second inner side surface 71 of the second mounting portion 7 faces the first inner side surface 42 of the first mounting portion 4. When the hand is released from the second mounting portion 7, the second mounting portion 7 comes into elastic contact with the first mounting portion 4 by the accumulated elasticity. At this time, the second divided body 2 is still slightly elastically deformed. That is, the second divided body 2 is pressed against the first divided body 1 by this elasticity in the assembled state. Therefore, the second divided body 2 is shaped into a shape along the first divided body 1, and the shape is held by the first divided body 1. Further, most of the second flange portion 8 is pressed against the first flange portion 5 by this elasticity. For this reason, the 1st division body 1 and the 2nd division body 2 are assembled | attached easily. In the duct of the second embodiment as well, in the assembled state, the circumferential end of the second peripheral wall 6 and the base wall 41 are further abutted, and the circumferential end of the first peripheral wall 3 and the second peripheral wall 6 is substantially abutted with the circumferential end. For this reason, the duct of Example 2 also has a small pressure loss.

（実施例３）
実施例３のダクトは、第１分割体１が第１取付部４を一つだけ持ち、第２分割体２が第２取付部７を一つだけ持つこと以外は実施例２のダクトと同じものである。実施例３のダクトを模式的に表す断面図を図７に示す。 (Example 3)
The duct of the third embodiment is the same as the duct of the second embodiment except that the first divided body 1 has only one first mounting portion 4 and the second divided body 2 has only one second mounting portion 7. Is. FIG. 7 shows a cross-sectional view schematically showing the duct of the third embodiment.

実施例３のダクトにおける第１取付部４は、第１周壁部３の右端に一体化されている。また、第２取付部７は、第２周壁部６の右先端に一体化されている。実施例３のダクトにおける第１取付部４および第２取付部７は、実施例１、２のダクトにおける第１取付部４ｂおよび第２取付部７ｂと同形状である。 The first mounting portion 4 in the duct according to the third embodiment is integrated with the right end of the first peripheral wall portion 3. The second mounting portion 7 is integrated with the right tip of the second peripheral wall portion 6. The first attachment portion 4 and the second attachment portion 7 in the duct of the third embodiment have the same shape as the first attachment portion 4b and the second attachment portion 7b in the ducts of the first and second embodiments.

第１周壁部３の左端部には、溝状をなす嵌合溝９０が形成されている。詳しくは、嵌合溝９０は、第１周壁部３の外周面３１からダクトの径方向外側に延びる溝基壁９１と、溝基壁９１の突出端から上方に延びる溝壁９２と、溝壁９２の上端からダクト本体９の径方向内側に延びる鉤状の返し壁９３と、溝壁９２の径方向内側に配置され上方に延びる溝内壁９４とで区画されている。取付状態においては、第２周壁部６の左端が嵌合溝９０の内部に差し込まれる。すなわち、第２周壁部６の左端は嵌合爪として機能し、嵌合溝９０と嵌合する。 A fitting groove 90 having a groove shape is formed at the left end of the first peripheral wall 3. Specifically, the fitting groove 90 includes a groove base wall 91 extending radially outward of the duct from the outer peripheral surface 31 of the first peripheral wall portion 3, a groove wall 92 extending upward from the protruding end of the groove base wall 91, and a groove wall The upper wall 92 is partitioned by a flange-like return wall 93 that extends radially inward of the duct body 9 from the upper end of the duct 92 and a groove inner wall 94 that is disposed radially inward of the groove wall 92 and extends upward. In the attached state, the left end of the second peripheral wall portion 6 is inserted into the fitting groove 90. That is, the left end of the second peripheral wall portion 6 functions as a fitting claw and is fitted with the fitting groove 90.

実施例３のダクトにおける第１分割体１と第２分割体２とは以下のように組み付ける。 The 1st division body 1 and the 2nd division body 2 in the duct of Example 3 are assembled | attached as follows.

先ず、第２周壁部６の左端を嵌合溝９０の内部に差し込み、第２周壁部６の左端と嵌合溝９０とを嵌合させる。次いで、第２取付部７を手でつまんで弾性変形させ、第２取付部７の第２内側面７１を第１取付部４の第１内側面４２に対面させる。そして、第２取付部７から手を離し、第２取付部７を第１取付部４に弾接させる。このとき第２フランジ部８は第１フランジ部５に当接する。 First, the left end of the second peripheral wall 6 is inserted into the fitting groove 90, and the left end of the second peripheral wall 6 and the fitting groove 90 are fitted. Next, the second mounting portion 7 is pinched by hand to be elastically deformed, and the second inner side surface 71 of the second mounting portion 7 faces the first inner side surface 42 of the first mounting portion 4. Then, the hand is released from the second mounting portion 7, and the second mounting portion 7 is brought into elastic contact with the first mounting portion 4. At this time, the second flange portion 8 contacts the first flange portion 5.

実施例３のダクトによると、第２周壁部６の左端を嵌合溝９０に差し込む作業が比較的煩雑ではあるが、実施例２のダクトと同様に、第１フランジ部５で第２フランジ部８の位置決めをし、かつ、第１取付部４で第２取付部７の位置決めをすることで、第２分割体２を第１分割体１に容易に組み付けることができる。 According to the duct of the third embodiment, although the operation of inserting the left end of the second peripheral wall portion 6 into the fitting groove 90 is relatively complicated, the first flange portion 5 and the second flange portion are similar to the duct of the second embodiment. The second divided body 2 can be easily assembled to the first divided body 1 by positioning 8 and positioning the second mounting portion 7 with the first mounting portion 4.

なお、実施例３のダクトにおいても、第２周壁部６の右端部と基底壁４１とが突き合わせられている。このため、実施例３のダクトもまた圧損が小さい。 In the duct of Example 3, the right end portion of the second peripheral wall portion 6 and the base wall 41 are abutted. For this reason, the duct of Example 3 also has a small pressure loss.

（実施例４）
実施例４のダクトは、第１取付部４の内側に立壁状の支持壁が設けられていること、および、組み付け状態において第１周壁部３の端面と第２周壁部６の端面とがダクトの径方向にずれていること以外は実施例２のダクトと同じものである。実施例４のダクトを模式的に表す断面図を図８に示す。 Example 4
In the duct of the fourth embodiment, a vertical wall-like support wall is provided inside the first mounting portion 4, and the end surface of the first peripheral wall portion 3 and the end surface of the second peripheral wall portion 6 in the assembled state are ducts. This is the same as the duct of the second embodiment except that it is displaced in the radial direction. FIG. 8 shows a cross-sectional view schematically showing the duct of the fourth embodiment.

支持壁３５は、第１取付部４の基部４３に一体に形成され、第１周壁部３の左右端部からそれぞれ上方に延びている。詳しくは、支持壁３５は第１周壁部３と同軸の円周上に延在している。支持壁３５と第１取付部４とは左右方向に離間している。そして、組み付け状態において、折り返し部７０は、第１取付部４と支持壁３５との間に挟持される。換言すると、組み付け状態において、第１周壁部３の周方向先端（実施例４においては基部４３）と第２周壁部６の周方向先端６８とはダクトの径方向に僅かに位置ズレし、支持壁３５がダクト本体９８の内部形状に僅かに干渉する。 The support wall 35 is integrally formed with the base portion 43 of the first mounting portion 4 and extends upward from the left and right end portions of the first peripheral wall portion 3. Specifically, the support wall 35 extends on a circumference coaxial with the first peripheral wall portion 3. The support wall 35 and the first attachment portion 4 are separated in the left-right direction. In the assembled state, the folded portion 70 is sandwiched between the first mounting portion 4 and the support wall 35. In other words, in the assembled state, the circumferential tip of the first circumferential wall 3 (base 43 in the fourth embodiment) and the circumferential tip 68 of the second circumferential wall 6 are slightly displaced in the radial direction of the duct, and are supported. The wall 35 slightly interferes with the internal shape of the duct body 98.

しかし、第２周壁部６の周方向先端と基底壁４１とは突き合わされているため、支持壁３５はダクト本体９８の内部に大きく突出することはない。このため実施例４のダクトにおいても、空気の流通は阻害され難く、圧損増大が抑制される。 However, since the front end in the circumferential direction of the second peripheral wall portion 6 and the base wall 41 are abutted with each other, the support wall 35 does not protrude greatly into the duct body 98. For this reason, also in the duct of Example 4, the flow of air is not easily inhibited, and an increase in pressure loss is suppressed.

しかし、第２取付部７を第１取付部４および第１周壁部３によって挟持したことで、第１分割体１と第２分割体２とは安定して組み付けられる。また、第２分割体２の第２外側面７２は、実施例１、２のダクトと同様に自由状態であるため、第２分割体２と第１分割体１とは比較的容易に組み付けられる。さらに、実施例２のダクトと同様に、第２フランジ部８が第１フランジ部５に当接し、第２分割体２の弾力で第２取付部７と第１取付部４とが係止するため、第２分割体２を第１分割体１に沿った形状に容易に整形できる。よって、実施例４のダクトにおいても、第１分割体１と第２分割体２との組み付け作業は容易である。なお、支持壁３５は、ダクトの軸線方向に沿って延びる長尺の立壁状をなすのが好ましいが、柱状、粒状等の短尺状の支持壁３５をダクトの軸線方向に沿って複数個配列しても良い。 However, since the second attachment portion 7 is sandwiched between the first attachment portion 4 and the first peripheral wall portion 3, the first divided body 1 and the second divided body 2 are stably assembled. Moreover, since the 2nd outer side surface 72 of the 2nd division body 2 is a free state similarly to the duct of Example 1, 2, the 2nd division body 2 and the 1st division body 1 are assembled | attached comparatively easily. . Further, similarly to the duct of the second embodiment, the second flange portion 8 abuts on the first flange portion 5, and the second mounting portion 7 and the first mounting portion 4 are locked by the elasticity of the second divided body 2. Therefore, the second divided body 2 can be easily shaped into a shape along the first divided body 1. Therefore, also in the duct of Example 4, the assembling work of the first divided body 1 and the second divided body 2 is easy. The support wall 35 preferably has a long standing wall shape extending along the axial direction of the duct, but a plurality of columnar, granular, etc. short support walls 35 are arranged along the axial direction of the duct. May be.

（実施例５）
実施例５のダクトは、第２取付部７および第２フランジ部８が軸線方向の一部において分断されていること以外は実施例２のダクトと同じものである。実施例５のダクトを模式的に表す斜視図を図９に示す。 (Example 5)
The duct of the fifth embodiment is the same as the duct of the second embodiment except that the second mounting portion 7 and the second flange portion 8 are divided at a part in the axial direction. FIG. 9 is a perspective view schematically showing the duct of the fifth embodiment.

図９に示すように、実施例５のダクトにおける第２取付部７および第２フランジ部８は、ダクトの湾曲部分において複数に分断されている。このため第２取付部７は、ダクトが湾曲形状をなしているにも拘わらず容易に弾性変形する。したがって、実施例５のダクトにおいては、第１分割体１と第２分割体２との組み付け作業がより一層容易である。なお、この第２分割体２における第２取付部７は分断されているが、第２周壁部６は分断されていない。また、第２取付部７の分断されている部分において、第２周壁部６の端面は底内面４５（図略）およびシール凸部４８に圧接する。このため、実施例５のダクトにおいても、第１分割体１と第２分割体２とはシール性高く組み付けられる。 As shown in FIG. 9, the second attachment portion 7 and the second flange portion 8 in the duct of the fifth embodiment are divided into a plurality of portions in the curved portion of the duct. Therefore, the second mounting portion 7 is easily elastically deformed even though the duct has a curved shape. Therefore, in the duct of the fifth embodiment, the assembly work of the first divided body 1 and the second divided body 2 is much easier. In addition, although the 2nd attachment part 7 in this 2nd division body 2 is parted, the 2nd surrounding wall part 6 is not parted. Further, in the portion where the second mounting portion 7 is divided, the end surface of the second peripheral wall portion 6 is in pressure contact with the bottom inner surface 45 (not shown) and the seal convex portion 48. For this reason, also in the duct of Example 5, the 1st division body 1 and the 2nd division body 2 are assembled | attached with high sealing performance.

（実施例６）
実施例６のダクトは、第１取付部４の形状以外は実施例２のダクトと同じものである。実施例６のダクトを模式的に表す断面図を図１０に示す。 (Example 6)
The duct of the sixth embodiment is the same as the duct of the second embodiment except for the shape of the first mounting portion 4. FIG. 10 is a cross-sectional view schematically showing the duct of the sixth embodiment.

図１０に示すように、実施例６のダクトにおける第１取付部４は、基底壁を持たず一般壁４０のみで構成されている。このため第２取付部７の折り返し部７０は、基底部とは突き合わされず、第１取付部４の周方向端部よりもやや径方向内側に配置されている。しかし実施例６のダクトにおいても、第２分割体２の第２外側面７２は自由状態であり、第２フランジ部８が第１フランジ部５に当接するよう構成されているため、第２分割体２を第１分割体１に沿った形状に容易に整形できる。よって、実施例６のダクトにおいても、第１分割体１と第２分割体２との組み付け作業は容易である。 As shown in FIG. 10, the first mounting portion 4 in the duct of the sixth embodiment has only a general wall 40 without a base wall. For this reason, the folding | returning part 70 of the 2nd attachment part 7 is not faced | matched with the base part, but is arrange | positioned in the radial inside a little rather than the circumferential direction edge part of the 1st attachment part 4. FIG. However, also in the duct of the sixth embodiment, the second outer surface 72 of the second divided body 2 is in a free state, and the second flange portion 8 is configured to contact the first flange portion 5. The body 2 can be easily shaped into a shape along the first divided body 1. Therefore, also in the duct of Example 6, the assembly work of the first divided body 1 and the second divided body 2 is easy.

本発明の分割型ダクトは、車両用の吸気ダクトとして好適に利用できる。 The split type duct of the present invention can be suitably used as an intake duct for a vehicle.

１：第１分割体２：第２分割体
３：第１周壁部３２：第１周壁部の内周面
３８：第１周壁部の周方向先端４：第１取付部
４１：基底部４２：第１内側面
４４：テーパ面４８：シール凸部
４９：第１取付部の先端部５：第１フランジ部
６：第２周壁部６２：第２周壁部の内周面
６１：第２周壁部の外周面６８：第２周壁部の周方向先端
７：第２取付部７０：折り返し部
７１：第２内側面７２：第２外側面
７９：第２取付部の先端部８：第２フランジ部 1: 1st division body 2: 2nd division body 3: 1st surrounding wall part 32: The internal peripheral surface 38 of a 1st surrounding wall part: The circumferential direction front-end | tip of a 1st surrounding wall part 4: 1st attaching part 41: Base part 42: 1st inner surface 44: Tapered surface 48: Seal convex part 49: The front-end | tip part of a 1st attaching part 5: 1st flange part 6: 2nd surrounding wall part 62: The internal peripheral surface 61 of a 2nd surrounding wall part: 2nd surrounding wall part 68: circumferential tip of second peripheral wall portion 7: second mounting portion 70: folded portion 71: second inner surface 72: second outer surface 79: tip portion of second mounting portion 8: second flange portion

Claims

A cylindrical duct formed by integrating at least two divided bodies,
The first divided body, which is one of the divided bodies, is a non-breathable member, and constitutes a part of the duct in the circumferential direction in at least a part of the axial direction of the duct,
The second divided body, which is another one of the divided bodies, is a breathable member, and constitutes another part of the duct in the circumferential direction at least in the axial direction of the duct,
The first divided body is formed integrally with at least one of a first peripheral wall portion constituting the peripheral wall of the duct and a pair of circumferential end portions of the first peripheral wall portion, and protrudes toward the outside of the duct. A first flange portion that is integrally formed at a distal end portion of the first attachment portion, extends in a direction intersecting with the first attachment portion, and protrudes further to the outside of the duct than the first attachment portion; Have
The second divided body is formed integrally with at least one of a second peripheral wall portion constituting the peripheral wall of the duct and a pair of circumferential end portions of the second peripheral wall portion, and is formed on the outer peripheral surface side of the second peripheral wall portion. A second mounting portion having a folded shape, and is formed integrally with the distal end portion of the second mounting portion and extends in a direction crossing the second mounting portion, and further protrudes outside the duct from the second mounting portion. A second flange portion to be
In the assembled state in which the first divided body and the second divided body are assembled,
The second inner surface that is continuous with the inner peripheral surface of the second peripheral wall portion in the second mounting portion is the first inner surface that is continuous with the inner peripheral surface of the first peripheral wall portion in the first mounting portion. Face to face
At least a part of the second flange portion is in contact with and joined to the first flange portion.

The duct according to claim 1, wherein in the assembled state, the second attachment portion elastically contacts the first attachment portion.

The first mounting portion has a general wall that is a portion on the protruding end side, and a base wall that is interposed between the circumferential tip of the first peripheral wall portion and the general wall,
The duct according to claim 1, wherein in the assembled state, a circumferential tip of the second peripheral wall portion and the base wall are abutted.

The first attachment portion has a protruding seal convex portion at a position facing a boundary portion between the second peripheral wall portion and the second attachment portion,
The duct according to any one of claims 1 to 3, wherein in the assembled state, the seal convex portion is in pressure contact with the boundary portion.

The taper surface located on the protruding end side in the first inner surface is inclined from the radially outer side to the radially inner side of the duct from the protruding end side to the base side of the first mounting portion. Item 5. The duct according to any one of Items 1 to 4.