JP6054703B2 - Assembly structure of hollow parts - Google Patents

Assembly structure of hollow parts Download PDF

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JP6054703B2
JP6054703B2 JP2012233362A JP2012233362A JP6054703B2 JP 6054703 B2 JP6054703 B2 JP 6054703B2 JP 2012233362 A JP2012233362 A JP 2012233362A JP 2012233362 A JP2012233362 A JP 2012233362A JP 6054703 B2 JP6054703 B2 JP 6054703B2
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opening
resonator
guide rib
wall surface
side wall
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JP2014084768A (en
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隆文 柴田
隆文 柴田
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Mahle Filter Systems Japan Corp
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Mahle Filter Systems Japan Corp
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本発明は、合成樹脂材料からなる中空部品の組付構造に関する。   The present invention relates to an assembly structure of hollow parts made of a synthetic resin material.

例えば、特許文献１には、上面が開口したレゾネータボディと、レゾネータボディの上面開口を覆うレゾネータカバーとを組み付けるにあたって、レゾネータボディの開口部と、レゾネータカバーの開口部とを嵌合させると共に、レゾネータカバーと、レゾネータボディとをいわゆるスナップフィットにより連結して一体にする構成が開示されている。   For example, in Patent Document 1, when assembling a resonator body having an open top surface and a resonator cover that covers the top surface opening of the resonator body, the resonator body opening and the resonator cover opening are fitted together, and the resonator A structure is disclosed in which a cover and a resonator body are connected and integrated by a so-called snap fit.

特開２００９−１５０２８３号公報JP 2009-150283 A

しかしながら、このような特許文献１においては、成形時の反りやスナップフィットによる係合時の変形により、レゾネータボディやレゾネータカバーに変形が生じた場合、レゾネータボディの開口部と、レゾネータカバーの開口部との嵌合が困難となり、組み付け性が悪くなってしまう虞がある。   However, in Patent Document 1, when the resonator body or the resonator cover is deformed due to warpage during molding or deformation due to snap fit, the opening of the resonator body and the opening of the resonator cover May be difficult to fit, and the assembling property may be deteriorated.

そこで、本発明は、第１部品の開口部内壁面に、第２部品の開口部外壁面が接するよう、上記第１部品の開口部と上記第２部品の開口部とを接合してなる合成樹脂製の中空部品の組付構造であって、上記第１部品の開口部外周縁に形成された係合突起と、上記第２部品の開口部外周縁に形成され、上記第１、第２部品の互いの組付方向に沿って延びて上記係合突起と係合する係止片と、を有し、上記係止片の先端側が上記係合突起を乗り越え、上記係止片に形成された係合凹部に上記係合突起が係合することによって上記第１部品と上記第２部品とが連結される中空部品の組付構造において、上記第２部品の開口部内壁面に形成され、上記組付方向に沿って延び、その先端が上記第２部品の開口部よりも上記第１部品側に突出すると共に、上記係止片の先端が上記係合突起に接触する際に、その先端が上記組付方向で上記第１部品の開口部とラップするように設定されたガイドリブを有し、上記ガイドリブと上記第２部品の開口部外壁面との間には、段部が形成され、上記第１部品の開口部内壁面には、上記ガイドリブに相対する位置に、上記ガイドリブの外形状に沿った凹溝が形成され、上記凹溝は、上記第１部品の開口部内壁面よりも該第１部品の開口部外周側に凹んでいることを特徴としている。 Therefore, the present invention provides a synthetic resin obtained by joining the opening of the first component and the opening of the second component such that the outer wall surface of the opening of the second component is in contact with the inner wall surface of the opening of the first component. An assembly structure of a hollow part made of metal, the engaging projection formed on the outer periphery of the opening of the first part, and the outer periphery of the opening of the second part. And a locking piece that extends along the direction of assembly of each other and engages with the engaging protrusion, and the tip end side of the locking piece climbs over the engaging protrusion and is formed on the locking piece. In the assembly structure of the hollow part in which the first part and the second part are connected by engaging the engaging protrusion with the engaging recess, the assembly is formed on the inner wall surface of the opening of the second part. The tip extends along the attachment direction, and its tip protrudes toward the first part from the opening of the second part. When the tip of the locking piece comes into contact with the engaging protrusion, the tip has a guide rib set so that the tip wraps with the opening of the first component in the assembly direction, and the guide rib and the second A step portion is formed between the outer wall surface of the opening of the component, and a groove along the outer shape of the guide rib is formed on the inner wall surface of the opening of the first component at a position facing the guide rib. The concave groove is recessed on the outer peripheral side of the opening of the first part from the inner wall surface of the opening of the first part .

本発明によれば、第１、第２部品の開口部に反りが生じたり、係止片が係合突起に接触することにより第１部品の開口部が内側に撓み変形したとしても、係止片の先端が係合突起に接触した際には、ガイドリブの先端と第１部品の開口部とがラップした状態となっている。そのため、第１、第２部品の両開口部を、第２部品の開口部外壁面に第１部品に開口部内壁面が接するように案内することが容易となり、第１部品と第２部品との組み付け性を向上させることができる。   According to the present invention, even if the opening of the first and second parts is warped or the opening of the first part is bent and deformed inward due to the locking piece coming into contact with the engaging projection, When the tip of the piece comes into contact with the engagement protrusion, the tip of the guide rib and the opening of the first component are in a state of being wrapped. Therefore, it becomes easy to guide both the opening parts of the first and second parts so that the first part and the inner wall surface of the opening part are in contact with the outer wall surface of the opening part of the second part. Assembling property can be improved.

そして、ガイドリブと第２部品の開口部外壁面との間に段部を形成することで、ガイドリブが相対的に内側へ後退し、ガイドリブと係止片との間隔を相対的に大きく設定することが可能となるため、第１部品の開口部がガイドリブに干渉しにくくなり、第１部品と第２部品との組み付け性を向上させることができる。   Then, by forming a step portion between the guide rib and the outer wall surface of the opening of the second component, the guide rib moves relatively inward, and the distance between the guide rib and the locking piece is set to be relatively large. Therefore, the opening of the first component is less likely to interfere with the guide rib, and the assembly of the first component and the second component can be improved.

また、第１部品の開口部内壁面に、ガイドリブに相対する凹溝を形成すれば、凹溝によりガイドリブを案内することができるため、組み付け性を一層向上させることができる。   Moreover, if the concave groove facing the guide rib is formed on the inner wall surface of the opening of the first component, the guide rib can be guided by the concave groove, so that the assembling property can be further improved.

本発明が適用されたレゾネータの概略構成を模式的に示した説明図。BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which showed typically schematic structure of the resonator to which this invention was applied. 本発明が適用されたレゾネータのレゾネータボディの概略構成を模式的に示した説明図。BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which showed typically schematic structure of the resonator body of the resonator to which this invention was applied. 本発明が適用されたレゾネータのレゾネータカバーの概略構成を模式的に示した説明図。BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which showed typically schematic structure of the resonator cover of the resonator to which this invention was applied. レゾネータボディの要部を拡大して示した説明図。Explanatory drawing which expanded and showed the principal part of the resonator body. レゾネータボディにレゾネータカバーを組み付けた状態における要部の断面を模式的に示した説明図。Explanatory drawing which showed typically the cross section of the principal part in the state which assembled | attached the resonator cover to the resonator body. レゾネータボディにレゾネータカバーを組み付けた状態における要部の断面を模式的に示した説明図。Explanatory drawing which showed typically the cross section of the principal part in the state which assembled | attached the resonator cover to the resonator body. レゾネータカバーの要部を拡大して示した説明図。Explanatory drawing which expanded and showed the principal part of the resonator cover. レゾネータボディにレゾネータカバーを組み付ける前の状態における要部の断面を模式的に示した説明図。Explanatory drawing which showed typically the cross section of the principal part in the state before attaching a resonator cover to a resonator body. レゾネータボディにレゾネータカバーを組み付ける前の状態における要部の断面を模式的に示した説明図。Explanatory drawing which showed typically the cross section of the principal part in the state before attaching a resonator cover to a resonator body. レゾネータボディにレゾネータカバーを組み付けた状態における要部の断面を模式的に示した説明図。Explanatory drawing which showed typically the cross section of the principal part in the state which assembled | attached the resonator cover to the resonator body.

以下、本発明の一実施例を図面に基づいて詳細に説明する。   Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

図１〜図３は、本発明が適用されたレゾネータ１の概略構成を模式的に示した説明図である。このレゾネータ１は、例えばポリプロピレン等の合成樹脂材料からなり、本実施例では、自動車用内燃機関の吸気系に用いられる合成樹脂製の吸気ダクト２と一体に構成されている。   1 to 3 are explanatory diagrams schematically showing a schematic configuration of a resonator 1 to which the present invention is applied. The resonator 1 is made of, for example, a synthetic resin material such as polypropylene. In this embodiment, the resonator 1 is integrally formed with a synthetic resin intake duct 2 used for an intake system of an automobile internal combustion engine.

レゾネータ１は、レゾネータボディ（第１部品に相当）３と、レゾネータカバー４（第２部品に相当）と、からなり、両者を組み付けることで、内部に共鳴室となる空間が画成される樹脂製中空部品である。なお、本実施例では、レゾネータボディ３が吸気ダクト２を構成する吸気ダクトアッパー部材５と一体に成形されている。吸気ダクト２は、吸気ダクトアッパー部材５と吸気ダクトロア部材６とから大略構成されており、両部材を組み付けることで内部に吸気通路が画成されている。   The resonator 1 is composed of a resonator body (corresponding to a first part) 3 and a resonator cover 4 (corresponding to a second part), and by assembling both, a resin that defines a space serving as a resonance chamber is formed. This is a hollow part. In this embodiment, the resonator body 3 is formed integrally with the intake duct upper member 5 constituting the intake duct 2. The intake duct 2 is generally composed of an intake duct upper member 5 and an intake duct lower member 6, and an intake passage is defined inside by assembling both members.

レゾネータボディ３及びレゾネータカバー４は、周縁が立ち上がった略矩形の皿形状に形成され、両者の開口部が互いに嵌合している。レゾネータボディ３とレゾネータカバー４は、レゾネータカバー４の開口部外周縁に形成された複数の矩形の係止片７をレゾネータボディ３の開口部外周縁に形成された係合突起８に係合させることで、互いに一体に組み立てられるようになっている。   The resonator body 3 and the resonator cover 4 are formed in a substantially rectangular dish shape whose peripheral edge rises, and both openings are fitted to each other. The resonator body 3 and the resonator cover 4 engage a plurality of rectangular locking pieces 7 formed on the outer periphery of the opening of the resonator cover 4 with engaging protrusions 8 formed on the outer periphery of the opening of the resonator body 3. As a result, they can be assembled together.

詳述すると、係止片７には、先端側に係合突起８が係合する係合凹部としての開口窓部７ａが形成されている。開口窓部７ａは、矩形の貫通穴である。一方、係合突起８には、レゾネータボディ３とレゾネータカバー４の互いの組付方向に沿って傾いた傾斜面８ａが形成されている。そして、レゾネータボディ３にレゾネータカバー４を組み付ける際には、係止片７の先端側が係合突起８の傾斜面８ａに沿って係合突起８を乗り越え、係止片７の開口窓部７ａに、係合突起８が係合することによって、レゾネータボディ３とレゾネータカバー４とが一体に連結される。   More specifically, the locking piece 7 is formed with an opening window portion 7a as an engaging recess with which the engaging protrusion 8 engages on the tip side. The opening window 7a is a rectangular through hole. On the other hand, the engaging projection 8 is formed with an inclined surface 8 a that is inclined along the assembling direction of the resonator body 3 and the resonator cover 4. When the resonator cover 4 is assembled to the resonator body 3, the front end side of the locking piece 7 gets over the engaging protrusion 8 along the inclined surface 8 a of the engaging protrusion 8, and enters the opening window 7 a of the locking piece 7. When the engagement protrusion 8 is engaged, the resonator body 3 and the resonator cover 4 are integrally connected.

レゾネータボディ３には、図４〜図６に示すように、その開口部に沿って全周に第１側壁１１が連続して設けられている。第１側壁１１は、レゾネータボディ３の開口部内壁面を構成するものであって、上記組付方向に沿ってベース部１２から延びるよう形成されている。ベース部１２は、第１側壁１１よりも厚肉であり、相対的に高い剛性を有している。   As shown in FIGS. 4 to 6, the resonator body 3 is provided with a first side wall 11 continuously along the entire periphery thereof. The first side wall 11 constitutes the inner wall surface of the opening of the resonator body 3 and is formed to extend from the base portion 12 along the assembly direction. The base portion 12 is thicker than the first side wall 11 and has relatively high rigidity.

第１側壁１１の内側の壁面１１ａは、上記組付方向に平行となるよう形成されたシール面となっている。また、第１側壁１１の外側の壁面１１ｂも、上記組付方向に平行となるよう形成されている。第１側壁１１の先端の壁面１１ｃと、外側の壁面１１ｂとが交差する先端外側の角部は、斜めに切り落とされた形をなす壁面１１ｄとして、傾斜シール面を形成している。   The inner wall surface 11a of the first side wall 11 is a seal surface formed so as to be parallel to the assembly direction. Further, the outer wall surface 11b of the first side wall 11 is also formed to be parallel to the assembly direction. The corner portion outside the tip where the wall surface 11c at the tip of the first side wall 11 and the outer wall surface 11b intersect forms an inclined sealing surface as a wall surface 11d that is cut off obliquely.

また、レゾネータボディ３は、上記組付方向に沿って第１側壁１１と同じ方向へ向かってベース部１２から延出するよう形成された係止壁１３を有している。係止壁１３は、第１側壁１１の内側に位置し、第１側壁１１との間に溝状の凹部１４を形成する。係止壁１３の凹部１４側の壁面１３ａは、上記組付方向に対して傾斜している。   The resonator body 3 has a locking wall 13 formed so as to extend from the base portion 12 in the same direction as the first side wall 11 along the assembly direction. The locking wall 13 is located inside the first side wall 11 and forms a groove-like recess 14 between the locking wall 13 and the first side wall 11. The wall surface 13a on the recess 14 side of the locking wall 13 is inclined with respect to the assembling direction.

レゾネータカバー４には、図５〜図７に示すように、その開口部に沿って全周に第２側壁２１が連続して設けられている。第２側壁２１は、レゾネータカバー４の開口部外壁面を構成するものであって、上記組付方向に沿ってベース部２２から延びるよう形成されている。ベース部２２は、第２側壁２１よりも厚肉であり、相対的に高い剛性を有している。   As shown in FIGS. 5 to 7, the resonator cover 4 is provided with a second side wall 21 continuously along the entire periphery along the opening. The 2nd side wall 21 comprises the opening outer wall surface of the resonator cover 4, Comprising: It forms so that it may extend from the base part 22 along the said assembly direction. The base portion 22 is thicker than the second side wall 21 and has relatively high rigidity.

第２側壁２１の内側の壁面２１ａは、上記組付方向に平行となるよう形成されている。また、第２側壁２１の先端部においては、その内側の壁面２１ｂが、レゾネータボディ３側の壁面１３ａの傾きに合わせて傾斜するよう形成されている。第２側壁２１の外側の壁面２１ｃは、上記組付方向に平行となるよう形成されたシール面となっている。   The inner wall surface 21a of the second side wall 21 is formed to be parallel to the assembly direction. Further, the inner wall surface 21b is formed at the tip of the second side wall 21 so as to be inclined in accordance with the inclination of the wall surface 13a on the resonator body 3 side. The outer wall surface 21c of the second side wall 21 is a seal surface formed so as to be parallel to the assembly direction.

また、レゾネータカバー４は、上記組付方向に沿って第２側壁２１と同じ方向へ向かってベース部１２から延出するよう形成されたカバー壁２３を有している。カバー壁２３は、第２側壁２１の外側に位置し、第２側壁２１との間に凹部２４を形成する。   The resonator cover 4 has a cover wall 23 formed to extend from the base portion 12 in the same direction as the second side wall 21 along the assembly direction. The cover wall 23 is located outside the second side wall 21 and forms a recess 24 between the cover wall 23 and the second side wall 21.

凹部２４内には、第１側壁１１の壁面１１ｄに対向する段差部２５が形成されている。この段差部２５は、その角２５ａが第１側壁１１の壁面１１ｄの中間付近に位置するように形成されている。   A step 25 is formed in the recess 24 so as to face the wall surface 11 d of the first side wall 11. The step portion 25 is formed so that the corner 25 a is located near the middle of the wall surface 11 d of the first side wall 11.

本実施例では、レゾネータボディ３にレゾネータカバー４を組み付けると、図５及び図６に示すように、第１側壁１１の壁面１１ａと第２側壁２１の壁面２１ｃとが重なりあって互いに面接触し、かつレゾネータカバー４の段差部２５の角２５ａが第１側壁１１の壁面１１ｄに線接触する。   In this embodiment, when the resonator cover 4 is assembled to the resonator body 3, as shown in FIGS. 5 and 6, the wall surface 11a of the first side wall 11 and the wall surface 21c of the second side wall 21 overlap each other and come into surface contact with each other. In addition, the corner 25 a of the step portion 25 of the resonator cover 4 is in line contact with the wall surface 11 d of the first side wall 11.

このような本実施例のレゾネータカバー４には、図６及び図７に示すように、第２側壁２１の内側の壁面２１ａ、２１ｂの所定位置に、上記組付方向に沿って延びる棒状のガイドリブ２６が一体に設けられている。このガイドリブ２６は、レゾネータカバー４の裏面に形成された補強用リブ２７のうち、係止片７に近接するものと連続するよう形成されている。本実施例では、係止片７の裏側にガイドリブ２６が形成されている。 As shown in FIGS. 6 and 7, the resonator cover 4 according to the present embodiment has a rod-shaped guide rib extending along the assembly direction at predetermined positions on the inner wall surfaces 21 a and 21 b of the second side wall 21. 26 is provided integrally. The guide rib 26 is formed so as to be continuous with the reinforcing rib 27 formed on the back surface of the resonator cover 4 and adjacent to the locking piece 7 . In this embodiment, a guide rib 26 is formed on the back side of the locking piece 7 .

ガイドリブ２６は、第２側壁２１の先端よりも突出するよう形成されている。換言すれば、ガイドリブ２６の先端は、レゾネータカバー４の開口部よりもレゾネータボディ３側へ突出するように形成されている。   The guide rib 26 is formed so as to protrude from the tip of the second side wall 21. In other words, the leading end of the guide rib 26 is formed so as to protrude from the opening of the resonator cover 4 toward the resonator body 3.

図８〜図１０は、レゾネータボディ３にレゾネータカバー４を組み付ける際の両者の位置関係を示したものである。係止片７と係合突起８とが係合する位置においては、図８〜図１０に示すように、レゾネータボディ３とレゾネータカバー４とが近づいていく。   8 to 10 show the positional relationship between the resonator body 3 and the resonator cover 4 when assembled. At the position where the locking piece 7 and the engaging protrusion 8 are engaged, the resonator body 3 and the resonator cover 4 approach each other as shown in FIGS.

このガイドリブ２６は、レゾネータボディ３とレゾネータカバー４とを組み付ける際、係止片７の先端が係合突起８の傾斜面８ａに接触した際に（図９）、その先端が上記組付方向で、レゾネータボディ３の第１側壁１１の先端と所定量Ｍだけラップするように設定されている。つまり、係止片７の先端が係合突起８に接触した際に（図９）、上記組付方向でレゾネータボディ３の第１側壁１１と所定量Ｍだけラップするように、ガイドリブ２６の第２側壁２１先端からの上記組付方向に沿った突出長さが設定されている。   When assembling the resonator body 3 and the resonator cover 4, the guide rib 26 is arranged so that the tip of the locking piece 7 comes into contact with the inclined surface 8 a of the engagement protrusion 8 (FIG. 9). The tip of the first side wall 11 of the resonator body 3 is set to wrap by a predetermined amount M. That is, when the front end of the locking piece 7 comes into contact with the engaging protrusion 8 (FIG. 9), the guide rib 26 has the first rib so that it wraps by a predetermined amount M with the first side wall 11 of the resonator body 3 in the assembly direction. The protrusion length along the said assembly direction from the 2 side wall 21 front-end | tip is set.

さらに、このガイドリブ２６は、全体的に、第２側壁２１の外側の壁面２１ｃよりも内側に位置しており、図８〜図１０に示すように、ガイドリブ２６と第２側壁２１の壁面２１ｃとの間には、段部２８が形成されている。   Further, the guide rib 26 is generally located inside the outer wall surface 21c of the second side wall 21, and as shown in FIGS. 8 to 10, the guide rib 26 and the wall surface 21c of the second side wall 21 A step portion 28 is formed between them.

そして、このガイドリブ２６に対応して、レゾネータボディ３の開口部内壁面には、図４、図６、図８〜図１０に示すように、ガイドリブ２６の外形状に沿った凹溝２９が形成されている。つまり、この凹溝２９は、レゾネータボディ３の開口部内壁面のガイドリブ２６に相対する位置に形成されている。   Corresponding to the guide rib 26, a concave groove 29 is formed along the outer shape of the guide rib 26 on the inner wall surface of the opening of the resonator body 3 as shown in FIGS. 4, 6, and 8 to 10. ing. That is, the concave groove 29 is formed at a position facing the guide rib 26 on the inner wall surface of the opening of the resonator body 3.

このように構成された上記実施例によれば、成形時にレゾネータボディ３の開口部やレゾネータカバー４の開口部に内側への反りが生じたり、係止片７が係合突起８を乗り越える際にレゾネータボディ３の開口部が内側に撓んだとしても、係止片７の先端が、係合突起８の傾斜面８ａに接触した際に、上記組付方向でガイドリブ２６の先端と第１側壁１１の先端とがラップしているので、第１側壁１１の先端がガイドリブ２６と係止片７との間に位置するようにすれば、第１側壁１１の壁面１１ａに第２側壁２１の壁面２１ｃが接するよう、レゾネータボディ３の開口部及びレゾネータカバー４の開口部を容易に案内することができる。   According to the above embodiment configured as described above, when the opening of the resonator body 3 and the opening of the resonator cover 4 are warped inward during molding, or when the locking piece 7 gets over the engaging protrusion 8. Even if the opening of the resonator body 3 bends inward, when the tip of the locking piece 7 comes into contact with the inclined surface 8a of the engaging protrusion 8, the tip of the guide rib 26 and the first side wall in the assembling direction described above. 11 is overlapped with the front end of the first side wall 11 so that the front end of the first side wall 11 is positioned between the guide rib 26 and the locking piece 7. The opening of the resonator body 3 and the opening of the resonator cover 4 can be easily guided so that 21c comes into contact.

詳述すると、成形時の反りがレゾネータボディ３の開口部やレゾネータカバー４の開口部に生じていたとしても、ガイドリブ２６により第１側壁１１の壁面１１ａに第２側壁２１の壁面２１ｃが接するよう、第１側壁１１及び第２側壁２１を容易に案内することができる。また、係止片７が係合突起８を乗り越える際にレゾネータボディ３の開口部が内側に撓んだとしても、ガイドリブ２６に当接することによりこの撓み変形は抑制され、第１側壁１１の壁面１１ａに第２側壁２１の壁面２１ｃが接するよう、第１側壁１１及び第２側壁２１を容易に案内することができる。   More specifically, even if warping during molding occurs in the opening of the resonator body 3 or the opening of the resonator cover 4, the wall surface 21 c of the second side wall 21 is in contact with the wall surface 11 a of the first side wall 11 by the guide rib 26. The first side wall 11 and the second side wall 21 can be easily guided. Further, even when the opening of the resonator body 3 bends inward when the locking piece 7 gets over the engaging protrusion 8, the bending deformation is suppressed by contacting the guide rib 26, and the wall surface of the first side wall 11 is suppressed. The first side wall 11 and the second side wall 21 can be easily guided so that the wall surface 21c of the second side wall 21 is in contact with 11a.

つまり、ガイドリブ２６を設けることによって、レゾネータボディ３とレゾネータカバー４との組み付け性を向上させることができる。   That is, by providing the guide rib 26, it is possible to improve the assembling property between the resonator body 3 and the resonator cover 4.

また、ガイドリブ２６と第２側壁２１の壁面２１ｃとの間に段部２８を設け、ガイドリブ２６を第２側壁２１よりも相対的に内側に位置するように形成することで、ガイドリブ２６と係止片７との間隔を相対的に大きく設定することが可能となる。そのため、第１側壁１１がガイドリブ２６に干渉しにくくなり、レゾネータボディ３の開口部がガイドリブ２６に干渉しにくくなるので、レゾネータボディ３とレゾネータカバー４との組み付け性をさらに向上させることができる。   Further, a step portion 28 is provided between the guide rib 26 and the wall surface 21 c of the second side wall 21, and the guide rib 26 is formed so as to be positioned relatively inward of the second side wall 21, thereby engaging with the guide rib 26. It becomes possible to set the space | interval with the piece 7 relatively large. Therefore, the first side wall 11 is less likely to interfere with the guide rib 26, and the opening of the resonator body 3 is less likely to interfere with the guide rib 26, so that the assembling property between the resonator body 3 and the resonator cover 4 can be further improved.

そして、レゾネータボディ３の開口部内壁面に、凹溝２９を形成することで、レゾネータボディ３にレゾネータカバー４を組み付ける際に、凹溝２９によりガイドリブ２６を案内することができ、組み付け性を一層向上させることができる。   Then, by forming the concave groove 29 on the inner wall surface of the opening of the resonator body 3, the guide rib 26 can be guided by the concave groove 29 when the resonator cover 4 is assembled to the resonator body 3, thereby further improving the assemblability. Can be made.

また、凹溝２９を形成しない場合には、ガイドリブ２６がレゾネータボディ３の開口部内壁面と干渉しないようにするため、ガイドリブ２６に要求される厚み（図９における左右方向の厚み）を確保しようとすると、ガイドリブ２６をよりレゾネータカバー４の開口部内周側に位置するように設定する必要があり、レゾネータカバー４の開口部内壁面からのガイドリブ２６の突出量が相対的に大きくなる。しかしながら、凹溝２９を形成することにより、ガイドリブ２６に要求される厚みを確保しつつ、レゾネータカバー４の開口部内壁面に対して、ガイドリブ２６を相対的により外側に設定することが可能となる。つまり、ガイドリブ２６に要求される厚みを確保しつつ、ガイドリブ２６のレゾネータカバー４の開口部内側への突出量を相対的に小さくすることが可能となる。   Further, when the concave groove 29 is not formed, an attempt is made to secure the thickness required for the guide rib 26 (the thickness in the left-right direction in FIG. 9) so that the guide rib 26 does not interfere with the inner wall surface of the opening of the resonator body 3. Then, it is necessary to set the guide rib 26 so as to be positioned closer to the inner peripheral side of the opening of the resonator cover 4, and the protrusion amount of the guide rib 26 from the inner wall surface of the opening of the resonator cover 4 becomes relatively large. However, by forming the concave groove 29, it is possible to set the guide rib 26 on the outer side relative to the inner wall surface of the opening of the resonator cover 4 while ensuring the thickness required for the guide rib 26. That is, it is possible to relatively reduce the amount of protrusion of the guide rib 26 to the inside of the opening of the resonator cover 4 while ensuring the thickness required for the guide rib 26.

なお、本発明は、上述した実施例に限定されるものではなく、種々のダクト状のものや箱状のものなど、合成樹脂製の中空部品に広く適用可能である。上述した実施例では、ガイドリブ２６が係止片７の裏側に位置しているが、係止片７からオフセットした位置にガイドリブ２６を設けることも可能である。また、上述した実施例では、ガイドリブ２６がレゾネータカバー４の裏面に形成された補強用リブ２７と連続するように形成されているが、ガイドリブ２６は、補強用リブ２７と連続するように形成されたものに限定されるものではない。 In addition, this invention is not limited to the Example mentioned above, It can apply widely to synthetic resin hollow parts, such as a thing of a various duct shape and a box shape. In the embodiment described above, the guide rib 26 is located on the back side of the locking piece 7, but it is also possible to provide the guide rib 26 at a position offset from the locking piece 7. Further, in the above embodiment, formed as guide ribs 26 are formed to be continuous with the reinforcing ribs 27 formed on the rear surface of the resonator cover 4, the guide rib 26 is continuous with the reinforcement ribs 27 It is not limited to what was done.

１…レゾネータ
２…吸気ダクト
３…レゾネータボディ
４…レゾネータカバー
７…係止片
７ａ…開口窓部
８…係合突起
８ａ…傾斜面
１１…第１側壁
１２…ベース部
１３…係止壁
１４…凹部
２１…第２側壁
２２…ベース部
２３…カバー壁
２４…凹部
２５…段差部
２６…ガイドリブ
２７…補強用リブ
２８…段部
２９…凹溝 DESCRIPTION OF SYMBOLS 1 ... Resonator 2 ... Intake duct 3 ... Resonator body 4 ... Resonator cover 7 ... Locking piece 7a ... Opening window part 8 ... Engagement protrusion 8a ... Inclined surface 11 ... 1st side wall 12 ... Base part 13 ... Locking wall 14 ... Concave portion 21 ... second side wall 22 ... base portion 23 ... cover wall 24 ... concave portion 25 ... step portion 26 ... guide rib 27 ... reinforcing rib 28 ... step portion 29 ... concave groove

Claims (1)

第１部品の開口部内壁面に、第２部品の開口部外壁面が接するよう、上記第１部品の開口部と上記第２部品の開口部とを接合してなる合成樹脂製の中空部品の組付構造であって、
上記第１部品の開口部外周縁に形成された係合突起と、上記第２部品の開口部外周縁に形成され、上記第１、第２部品の互いの組付方向に沿って延びて上記係合突起と係合する係止片と、を有し、
上記係止片の先端側が上記係合突起を乗り越え、上記係止片に形成された係合凹部に上記係合突起が係合することによって上記第１部品と上記第２部品とが連結される中空部品の組付構造において、
上記第２部品の開口部内壁面に形成され、上記組付方向に沿って延び、その先端が上記第２部品の開口部よりも上記第１部品側に突出すると共に、上記係止片の先端が上記係合突起に接触する際に、その先端が上記組付方向で上記第１部品の開口部とラップするように設定されたガイドリブを有し、
上記ガイドリブと上記第２部品の開口部外壁面との間には、段部が形成され、
上記第１部品の開口部内壁面には、上記ガイドリブに相対する位置に、上記ガイドリブの外形状に沿った凹溝が形成され、
上記凹溝は、上記第１部品の開口部内壁面よりも該第１部品の開口部外周側に凹んでいることを特徴とする中空部品の組付構造。 A set of synthetic resin hollow parts formed by joining the opening part of the first part and the opening part of the second part so that the outer wall surface of the opening part of the second part is in contact with the inner wall surface of the opening part of the first part. With a structure,
An engagement protrusion formed on the outer periphery of the opening of the first part and an outer periphery of the opening of the second part, and extending along the assembly direction of the first and second parts. A locking piece that engages with the engaging protrusion,
The front end side of the locking piece gets over the engaging protrusion, and the engaging protrusion engages with an engaging recess formed in the locking piece, thereby connecting the first part and the second part. In the assembly structure of hollow parts,
Formed on the inner wall surface of the opening of the second part and extending along the assembly direction, the tip of the tip protrudes closer to the first part than the opening of the second part, and the tip of the locking piece A guide rib that is set so that the tip of the engagement protrusion wraps with the opening of the first component in the assembly direction when contacting the engagement protrusion;
A step is formed between the guide rib and the opening outer wall surface of the second component .
On the inner wall surface of the opening of the first component, a groove is formed along the outer shape of the guide rib at a position facing the guide rib.
The assembly structure of a hollow part, wherein the concave groove is recessed closer to the outer peripheral side of the opening of the first part than the inner wall surface of the opening of the first part .
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