JP5014973B2 - Intake duct for vehicle - Google Patents

Intake duct for vehicle Download PDF

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JP5014973B2
JP5014973B2 JP2007330638A JP2007330638A JP5014973B2 JP 5014973 B2 JP5014973 B2 JP 5014973B2 JP 2007330638 A JP2007330638 A JP 2007330638A JP 2007330638 A JP2007330638 A JP 2007330638A JP 5014973 B2 JP5014973 B2 JP 5014973B2
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duct
support
wall portion
vehicle
contact receiving
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JP2009150353A (en
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裕明 鈴木
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Inoac Corp
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Description

この発明は、車両用吸気ダクトに関するものである。   The present invention relates to a vehicle intake duct.

図8および図9に示すように、多くの自動車では、車体10の前部に画成されたエンジンルーム12内にエンジンEGが搭載されている。このエンジンEGには、周知の如く、エンジンルーム12内に設置されたエアクリーナーACを介し、外部の空気を連続的かつ安定的に供給することが必要不可欠である。そこで、エアクリーナーACに連結される外気導入用の車両用吸気ダクトD1が、車体10におけるエンジンルーム12の前側に配設され、この車両用吸気ダクトD1を介して車外の空気を取り込んでエアクリーナーACへ案内するようになっている。   As shown in FIGS. 8 and 9, in many automobiles, an engine EG is mounted in an engine room 12 defined in the front portion of the vehicle body 10. As is well known, it is indispensable for the engine EG to supply external air continuously and stably through an air cleaner AC installed in the engine room 12. Therefore, a vehicle intake duct D1 for introducing outside air connected to the air cleaner AC is disposed on the front side of the engine room 12 in the vehicle body 10, and air outside the vehicle is taken in via the vehicle intake duct D1. Guide to AC.

車両用吸気ダクトD1は、エンジンルーム12を開閉可能に閉成するエンジンフード14と、エンジンルーム12の前側に位置してラジエターRDを固定するためのラジエターサポート16との間の間隙Sに、空気取込口26が臨むように配設することが望ましい。しかし間隙Sは、図9および図11に示したように、車体形状の関係から上下方向の寸法を大きく確保することが困難な場合が多い。従って、車両用吸気ダクトD1の外形形状は、高さ寸法を低く抑えた幅広の扁平形状とせざるを得ない状況となっている。   The vehicle intake duct D1 has an air gap in an air gap S between an engine hood 14 that can open and close the engine room 12 and a radiator support 16 that is positioned on the front side of the engine room 12 and fixes the radiator RD. It is desirable to arrange so that the intake port 26 faces. However, as shown in FIG. 9 and FIG. 11, it is often difficult to ensure a large vertical dimension due to the vehicle body shape. Accordingly, the outer shape of the vehicle intake duct D1 is inevitably a wide flat shape with the height dimension kept low.

すなわち車両用吸気ダクトD1は、図10に一部破断して示すように、インジェクション成形またはブロー成形等の成形技術により成形された合成樹脂製で、互いに対向する上壁部分22および下壁部分24からなるダクト本体20が主体とされる。また車両用吸気ダクトD1は、屈曲状をなすダクト本体20の長手方向の一端に横長の空気取込口26を開設すると共に、長手方向の他端に略矩形の空気送出口28を開設してある。そしてダクト本体20は、図8および図11に示すように、その前側部分がピンまたはボルト等の適宜取付手段BLでラジエターサポート16の上面へ取り付けられ、その後側部分がエンジンルーム12内に設置されたエアクリーナーACへ連結される。   That is, as shown in FIG. 10, the vehicle intake duct D1 is made of synthetic resin formed by a molding technique such as injection molding or blow molding, and the upper wall portion 22 and the lower wall portion 24 facing each other. A duct body 20 made of The vehicle intake duct D1 has a horizontally long air intake 26 at one end in the longitudinal direction of the bent duct body 20 and a substantially rectangular air outlet 28 at the other end in the longitudinal direction. is there. As shown in FIGS. 8 and 11, the duct body 20 has a front portion attached to the upper surface of the radiator support 16 by appropriate attachment means BL such as pins or bolts, and a rear portion installed in the engine room 12. Connected to the air cleaner AC.

ここで、前述した車両用吸気ダクトD1のダクト本体20は、軽量化に伴う薄肉化および扁平状の外形形状等によって剛性があまり高くない。従って、通常の使用状態であっても、エンジンEGの駆動時におけるダクト本体20内の負圧化や、エンジンルーム12内の温度上昇によるダクト本体20の軟化により、上壁部分22および下壁部分24の陥凹的な変形が発生し易くなっている。特に、横長の空気取込口26が形成されたダクト本体20の前側部分では変形が起こり易く、上壁部分22および下壁部分24の変形により空気取込口26の開口面積が減少すると、エンジンEGへ空気を充分に取込めなくなる。そこで、図10および図11に示すように、下壁部分24にダクト本体20内へ突出する柱状の支持部30を設け、この支持部30で上壁部分22を内側から支持させる構成とすることで、前述した問題を解決する対策が施されている。これに関連する技術は、例えば特許文献1に開示されている。
特開2004−308453号公報
Here, the duct main body 20 of the above-described vehicle intake duct D1 is not so high in rigidity due to the thinning and the flat outer shape accompanying the weight reduction. Accordingly, even in a normal use state, the upper wall portion 22 and the lower wall portion are caused by the negative pressure in the duct body 20 when the engine EG is driven or the duct body 20 is softened due to the temperature rise in the engine room 12. Twenty-four concave deformations are likely to occur. In particular, when the front side portion of the duct body 20 in which the horizontally long air intake port 26 is formed is easily deformed, and the opening area of the air intake port 26 decreases due to the deformation of the upper wall portion 22 and the lower wall portion 24, the engine Air cannot be sufficiently taken into the EG. Therefore, as shown in FIGS. 10 and 11, the lower wall portion 24 is provided with a columnar support portion 30 that protrudes into the duct body 20, and the support portion 30 supports the upper wall portion 22 from the inside. Therefore, measures are taken to solve the above-mentioned problems. A technique related to this is disclosed in Patent Document 1, for example.
JP 2004-308453 A

ところで近年に至っては、歩行者保護に関する安全対策の確立が希求されており、歩行者が衝突した際にはその衝撃により車体が適度に変形することで、衝撃吸収を図るようにした所謂「歩行者傷害軽減ボディ」が開発されている。このため、エンジンフード14においては、歩行者が衝突した際の衝撃力により下方へ変形し易い構造とすることで、衝突による衝撃吸収を図って歩行者の負傷度合を軽減する対策が施されている。従って、エンジンフード14の真下に位置する車両用吸気ダクトD1は、エンジンフード14の変形につれてダクト本体20自体が変形して、エンジンフード14の変形を阻害しないことが要求されている。   By the way, the establishment of safety measures for pedestrian protection has been demanded in recent years, and when a pedestrian collides, the vehicle body is deformed appropriately by the impact, so-called `` walking '' "Injury alleviation body" has been developed. For this reason, the engine hood 14 has a structure that is easily deformed downward by an impact force when a pedestrian collides, thereby taking measures to reduce the degree of injury of the pedestrian by absorbing the impact due to the collision. Yes. Therefore, the vehicle intake duct D1 located directly under the engine hood 14 is required to be deformed by the duct body 20 itself as the engine hood 14 is deformed, so that the deformation of the engine hood 14 is not hindered.

そこで従来の車両用吸気ダクトD1は、エンジンフード14の変形に伴う外力が上方から付加された場合に、前述した支持部30を折曲的または撓曲的に圧縮変形させることで、ダクト本体20の変形を実現するようにしていた。しかしながら、ブロー成形されたダクト本体20の場合では、支持部30の肉厚のコントロールが困難であるから、該支持部30の強度にバラツキが発生し易くなっていた。例えば、支持部30が規定より厚く形成されていた場合には、図12に示すように、所定の外力が付加されても該支持部30が適切に変形しないから、所謂「支え棒」のように作用してダクト本体20の変形を阻害する問題が発生してしまう。また、インジェクション成形された上壁部分22と下壁部分24とを貼り合わせて形成されたダクト本体20の場合では、支持部30の肉厚のコントロールは比較的容易にできるとしても、外力が付加された場合に支持部30が折曲的または撓曲的に圧縮変形する態様は同様であるから、該支持部30の変形が増加するに伴って反発力が徐々に高まってしまい、依然として荷重の調節が困難となっていた。   Therefore, the conventional vehicle air intake duct D1 is configured such that when the external force accompanying the deformation of the engine hood 14 is applied from above, the support portion 30 described above is bent or flexibly compressed and deformed, whereby the duct body 20 It was trying to realize the deformation of. However, in the case of the blow molded duct body 20, it is difficult to control the thickness of the support portion 30, and thus the strength of the support portion 30 is likely to vary. For example, when the support part 30 is formed thicker than specified, as shown in FIG. 12, even if a predetermined external force is applied, the support part 30 is not appropriately deformed. The problem which acts on this and inhibits the deformation | transformation of the duct main body 20 will generate | occur | produce. Further, in the case of the duct body 20 formed by bonding the upper wall portion 22 and the lower wall portion 24 formed by injection molding, an external force is applied even though the thickness of the support portion 30 can be controlled relatively easily. In this case, since the support portion 30 is bent or flexibly compressed and deformed in the same manner, the repulsive force gradually increases as the deformation of the support portion 30 increases, and the load still remains. Adjustment was difficult.

本発明は、外力が付加された際にダクト本体が適切に変形する車両用吸気ダクトを提供することを目的とする。   An object of the present invention is to provide a vehicle intake duct in which a duct body is appropriately deformed when an external force is applied.

前記課題を解決し、所期の目的を達成するため、請求項1に記載の発明は、
互いに対向する第1壁体および第2壁体を有するダクト本体を備えた車両用吸気ダクトにおいて、
前記第1壁体における前記ダクト本体内に設けられ、第1壁体から前記第2壁体に向けて突出する支持部と、
前記第2壁体における前記支持部に対向する部位に設けられ、支持部と当したもとに前記第1壁体を支持する当接受部と、
前記当接受部と前記第2壁体とを分離する分離部と、
前記分離部の端部間に設けられて前記当接受部および前記第2壁体を接続し、当接受部に前記支持部が当接して荷重を受けた際に変形して、当接受部が前記ダクト本体の外側へ変位するのを許容する連設部とを備えることを要旨とする。
In order to solve the problem and achieve the intended purpose, the invention according to claim 1
In the vehicle intake duct including a duct body having a first wall body and a second wall body facing each other,
A support portion provided in the duct body in the first wall body and projecting from the first wall body toward the second wall body;
Provided in a portion opposite to the supporting portion of the second wall, and the abutting receiving portion supporting the first wall to Moto the support portion and the abutment,
A separation part for separating the contact receiving part and the second wall body;
The contact receiving portion and the second wall body are provided between the end portions of the separation portion, and deformed when the support portion comes into contact with the contact receiving portion and receives a load. The gist of the present invention is to provide a continuous portion that allows displacement to the outside of the duct body.

従って、請求項1に係る発明によれば、ダクト本体の第1壁体に外力が付加された際に、該第1壁体に設けた支持部が第2壁体に設けた当接受部を変位させることで、該支持部が変形することなく第1壁体が変形する。すなわち、ダクト本体における第1壁体の変形が、支持部の折曲的または撓曲的な圧縮変形によるものではなく、連設部での変形による当接受部の変位によってなされるので、第1壁体の変形が大きくなっても反発力が殆ど高まらない。また、第1壁体に対する外力の付加が解除された際には、連設部の復帰弾力により当接受部が支持部を押すので、ダクト本体が元の形状に復帰することも可能である。   Therefore, according to the first aspect of the present invention, when an external force is applied to the first wall body of the duct body, the support portion provided on the first wall body has the contact receiving portion provided on the second wall body. By displacing, the first wall body is deformed without deformation of the support portion. That is, the deformation of the first wall body in the duct main body is not caused by bending or bending compression deformation of the support portion, but is caused by displacement of the contact receiving portion due to deformation at the connecting portion. The repulsive force hardly increases even if the deformation of the wall increases. Further, when the external force applied to the first wall body is released, the abutment receiving portion pushes the support portion by the return elastic force of the connecting portion, so that the duct body can be returned to the original shape.

請求項2に記載の発明は、前記分離部は、前記第2壁体を貫通するスリット状に形成されたことを要旨とする。
従って、請求項2に係る発明によれば、第2壁体と該第2壁体に設けた当接受部とは、スリット状の分離部により当接受部の変位前から分離しているので、連設部での変形による当接受部の変位がスムーズに進行し、通常の使用状態に付加される外力より大きい外力が第1壁体に付加した際には該第1壁体が適切に変形する。
The gist of the invention described in claim 2 is that the separation portion is formed in a slit shape penetrating the second wall body.
Therefore, according to the invention according to claim 2, the second wall body and the contact receiving portion provided on the second wall body are separated from each other before the displacement of the contact receiving portion by the slit-shaped separation portion. When the displacement of the contact receiving portion due to the deformation at the connecting portion progresses smoothly and an external force greater than the external force applied in the normal use state is applied to the first wall body, the first wall body is appropriately deformed. To do.

請求項3に記載の発明は、前記分離部は、前記支持部が前記当接壁部を押した際に破断する薄肉状に形成されたことを要旨とする。
従って、請求項3に係る発明によれば、通常の使用状態においては、外部の空気が分離部を介してダクト本体内へ流入することを防止できる。
The gist of the invention described in claim 3 is that the separation portion is formed in a thin shape that breaks when the support portion pushes the abutting wall portion.
Therefore, according to the invention which concerns on Claim 3, it can prevent that external air flows in into a duct main body through a isolation | separation part in a normal use condition.

本発明に係る車両用吸気ダクトによれば、外力が付加してダクト本体の変形が大きくなっても反発力が殆ど高まらず、該ダクト本体を適切に変形させ得る。   According to the vehicle intake duct according to the present invention, even if an external force is applied and the deformation of the duct main body increases, the repulsive force hardly increases and the duct main body can be appropriately deformed.

次に、本発明に係る車両用吸気ダクトにつき、好適な実施例を挙げ、添付図面を参照しながら、以下に説明する。   Next, a preferred embodiment of the vehicle air intake duct according to the present invention will be described and described below with reference to the accompanying drawings.

本願が対象とする車両用吸気ダクトDは、図8〜図12に示した従来の車両用吸気ダクトD1と同様に、エンジンルーム12の前側車体構成部分であるラジエターサポート16とエンジンフード14との間の間隙Sに、ダクト本体40の空気取込口46を臨ませた状態で設置される。実施例では、図10に示す従来の車両用吸気ダクトD1のダクト本体20と外形形状が、基本的に同一のダクト本体40を有した車両用吸気ダクトDを例示し、車両における同一の構成部分、部材については、同一の符号を付して説明を省略する。そして、車両用吸気ダクトDにおいて車体10の前側を指向した側を前側とし、該車両用吸気ダクトDにおいてエアクリーナーACに連結される側を後側とする。また、車体10の前側から見た該車体10の車幅方向を、車両用吸気ダクトDの左右方向とする。   The vehicle air intake duct D that is the subject of the present application is similar to the conventional vehicle air intake duct D1 shown in FIGS. 8 to 12, and includes a radiator support 16 and an engine hood 14 that are front body components of the engine room 12. It is installed with the air intake 46 of the duct body 40 facing the gap S between them. In the embodiment, an example of the vehicle intake duct D having the duct body 40 having the same outer shape as the duct body 20 of the conventional vehicle intake duct D1 shown in FIG. About a member, the same code | symbol is attached | subjected and description is abbreviate | omitted. A side of the vehicle intake duct D that faces the front side of the vehicle body 10 is a front side, and a side of the vehicle intake duct D that is connected to the air cleaner AC is a rear side. Further, the vehicle width direction of the vehicle body 10 viewed from the front side of the vehicle body 10 is the left-right direction of the vehicle intake duct D.

実施例の車両用吸気ダクトDは、図1および図2に示すように、ポリエチレン(PE)やポリプロピレン(PP)等の合成樹脂素材からブロー成形された屈曲筒体状をなすダクト本体40を備えている。このダクト本体40は、互いに対向する上壁部分(第1壁体)42および下壁部分(第2壁体)44からなり、エンジンルーム12の前側に取り付けた際に、上壁部分42がエンジンフード14に対向する。ダクト本体40の長手方向の一端である前端部に横長の空気取込口46が形成されていると共に、長手方向の他端である後端部に空気送出口48が形成されている。空気送出口48の外周囲には、エアクリーナーACの空気流入口に嵌合する筒状の連結部50が設けられている。また、ダクト本体40の前端部には、該ダクト本体40の外面から側方へ延出した取付片部52,52が設けられている。これら取付片部52,52には、ラジエターサポート16の上面に締結されるボルトBLが挿通する係止孔が穿設されている。なおダクト本体40は、上壁部分42および下壁部分44を個別にインジェクション成形して、これら上壁部分42および下壁部分44の端部を接合して形成することも可能である。   As shown in FIGS. 1 and 2, the vehicle air intake duct D of the embodiment includes a duct body 40 having a bent cylindrical shape blow-molded from a synthetic resin material such as polyethylene (PE) or polypropylene (PP). ing. The duct body 40 includes an upper wall portion (first wall body) 42 and a lower wall portion (second wall body) 44 facing each other. When the duct body 40 is attached to the front side of the engine room 12, the upper wall portion 42 is engine-mounted. Opposite the hood 14. A horizontally long air intake 46 is formed at the front end which is one end in the longitudinal direction of the duct body 40, and an air outlet 48 is formed at the rear end which is the other end in the longitudinal direction. A cylindrical connecting portion 50 that fits into the air inlet of the air cleaner AC is provided on the outer periphery of the air outlet 48. Further, attachment piece portions 52, 52 extending from the outer surface of the duct main body 40 to the side are provided at the front end portion of the duct main body 40. The mounting pieces 52 and 52 are provided with locking holes through which bolts BL fastened to the upper surface of the radiator support 16 are inserted. The duct body 40 can also be formed by individually injection-molding the upper wall portion 42 and the lower wall portion 44 and joining the end portions of the upper wall portion 42 and the lower wall portion 44.

上壁部分42には、図1〜図3に示すように、空気取込口46の後側に隣接した部位に、該上壁部分42からダクト本体40内へ突出する柱状の支持部60が設けられている。また、下壁部分44における支持部60に対向する部位に、当接受部62が設けられている。従って、上壁部分42の支持部60が設けられた部位を上方から押した際には、該上壁部分42が下方へ沈み込むように変形することに伴い、該支持部60の先端が当接受部62に当接するよう構成されている。   As shown in FIGS. 1 to 3, the upper wall portion 42 has a columnar support portion 60 that protrudes from the upper wall portion 42 into the duct body 40 at a portion adjacent to the rear side of the air intake port 46. Is provided. Further, a contact receiving portion 62 is provided at a portion of the lower wall portion 44 that faces the support portion 60. Therefore, when the portion of the upper wall portion 42 where the support portion 60 is provided is pushed from above, the tip of the support portion 60 is abutted as the upper wall portion 42 is deformed so as to sink downward. The contact portion 62 is configured to abut.

支持部60は、上壁部分42の成形時に該上壁部分42に一体成形され、該上壁部分42の肉厚と略同一の肉厚の略四角錐形状を呈している。また、支持部60のダクト本体40内への突出長さは、該支持部60の先端が当接受部62との間に僅かな隙間ができる程度とされ、これら支持部60と当接受部62とは、ダクト本体40の非変形時には分離している。そして、下壁部分44の一部をなす当接受部62に支持部60の先端が当接すると、上壁部分42の該支持部60が設けられた部位が支持される。なお、支持部60の突出長さは、支持部60の先端が当接受部62と接触する長さであってもよい。   The support portion 60 is integrally formed with the upper wall portion 42 when the upper wall portion 42 is formed, and has a substantially quadrangular pyramid shape with a thickness substantially the same as the thickness of the upper wall portion 42. Further, the protruding length of the support portion 60 into the duct body 40 is such that a slight gap is formed between the tip of the support portion 60 and the contact receiving portion 62, and the support portion 60 and the contact receiving portion 62 are formed. Is separated when the duct body 40 is not deformed. And if the front-end | tip of the support part 60 contact | abuts to the contact receiving part 62 which makes a part of lower wall part 44, the site | part in which this support part 60 of the upper wall part 42 was provided will be supported. The protruding length of the support portion 60 may be a length such that the tip of the support portion 60 comes into contact with the contact receiving portion 62.

支持部60の形成位置は、図2に示すように、ダクト本体40の前側部分をラジエターサポート16の上面に固定させた状態において、該ラジエターサポート16の上面から外れた後側となるように設定されている。支持部60の形成位置をこのように設定するのは、図4に示すように、上壁部分42に外力が付加された際に、下壁部分44の側へ移動した支持部60が、ダクト本体40の外側(下方)へ突出するからである。なお、支持部60の突出形状は、前述した略四角錐形状に限定されるものではなく、例えば円錐または楕円錐形状、多角錐形状、円柱または角柱形状等であってもよいし、空気の流れを制御するように空気の流れ方向に沿ったリブ形状でもよい。   As shown in FIG. 2, the formation position of the support portion 60 is set to be the rear side of the radiator support 16 when the front portion of the duct body 40 is fixed to the upper surface of the radiator support 16. Has been. As shown in FIG. 4, the formation position of the support portion 60 is set in such a manner that when the external force is applied to the upper wall portion 42, the support portion 60 moved to the lower wall portion 44 side is ducted. This is because it protrudes outward (downward) from the main body 40. Note that the protruding shape of the support portion 60 is not limited to the substantially quadrangular pyramid shape described above, and may be, for example, a cone or elliptical cone shape, a polygonal pyramid shape, a cylinder or a prism shape, or the flow of air. It may be a rib shape along the air flow direction so as to control.

下壁部分44の当接受部62を囲繞する部分には、該当接受部62と下壁部分44とを所要長に分離する分離部64と、この分離部64の端部間に位置して当接受部62を下壁部分44に接続する連設部66とが設けられている。分離部64は、図1および図3に示すように、当接受部62の周囲三方を囲むように下壁部分44に形成したスリット状の開口である。すなわち分離部64は、当接受部62の周囲三方である左側縁部、後縁部および右側縁部に沿って該当接受部62を囲み、平面視において略U字形に延在するスリット70により形成されている。従って下壁部分44は、分離部64および連設部66で囲まれた部分とその外側の部分とに分けられ、分離部64および連設部66で囲まれた部分が前述の当接受部62となっている。すなわち、当接受部62は下壁部分44の一部であり、これら当接受部62と下壁部分44とは同一の肉厚に形成されている。なお、当接受部62の形成位置は、図2に示すように、ダクト本体40の前側部分をラジエターサポート16の上面に取着固定した状態において、該ラジエターサポート16の上面から外れた後側となるように設定されている。前述した分離部64のスリット70は、ダクト本体40を成形した後工程において、ミーリング加工またはプレス加工等により開設される。   A portion of the lower wall portion 44 surrounding the contact receiving portion 62 is located between a separation portion 64 that separates the corresponding reception portion 62 and the lower wall portion 44 into a required length, and an end portion of the separation portion 64. A connecting portion 66 that connects the receiving portion 62 to the lower wall portion 44 is provided. As shown in FIGS. 1 and 3, the separation portion 64 is a slit-like opening formed in the lower wall portion 44 so as to surround three sides around the contact receiving portion 62. That is, the separation portion 64 is formed by a slit 70 that surrounds the corresponding receiving portion 62 along the left side edge, the rear edge, and the right side edge, which are three sides around the contact receiving portion 62, and extends in a substantially U shape in plan view. Has been. Accordingly, the lower wall portion 44 is divided into a portion surrounded by the separating portion 64 and the continuous portion 66 and an outer portion thereof, and the portion surrounded by the separating portion 64 and the continuous portion 66 is the contact receiving portion 62 described above. It has become. That is, the contact receiving portion 62 is a part of the lower wall portion 44, and the contact receiving portion 62 and the lower wall portion 44 are formed to have the same thickness. As shown in FIG. 2, the contact receiving portion 62 is formed at a position where the front side portion of the duct body 40 is attached to the upper surface of the radiator support 16 and the rear side of the radiator support 16 is detached from the upper surface. It is set to be. The slit 70 of the separation part 64 described above is opened by milling or pressing in the subsequent process of forming the duct body 40.

連設部66は、分離部64における両方の端部64A,64A間に位置し、当接受部62の前縁部に沿った部位である。すなわち当接受部62は、連設部66で下壁部分44に接続されて後側に向け延出する舌片状に形成されている。従って、上壁部分42に下方への外力が付加されて支持部60が当接受部62を内側から押した際には、これにより荷重を受けた連設部66において折曲的または撓曲的に変形することで、当接受部62がダクト本体40の外側へ変位するよう構成されている。そして、当接受部62がダクト本体40の外側へ変位することで下壁部分44に開口部68が形成され、この開口部68を介して支持部60がダクト本体40の外側へ突出することで、上壁部分42の下方への変形が可能となる。   The continuous portion 66 is located between both end portions 64 </ b> A and 64 </ b> A in the separation portion 64 and is a portion along the front edge portion of the contact receiving portion 62. That is, the contact receiving portion 62 is connected to the lower wall portion 44 by the connecting portion 66 and is formed in a tongue shape extending toward the rear side. Therefore, when a downward external force is applied to the upper wall portion 42 and the support portion 60 pushes the contact receiving portion 62 from the inside, the connecting portion 66 that receives the load is bent or bent. The contact receiving portion 62 is configured to be displaced to the outside of the duct main body 40 by being deformed into the shape. Then, the contact receiving portion 62 is displaced to the outside of the duct body 40 to form an opening 68 in the lower wall portion 44, and the support portion 60 protrudes to the outside of the duct body 40 through the opening 68. The upper wall portion 42 can be deformed downward.

連設部66の折曲的または撓曲的な変形を発現させる変形荷重は、該連設部66の延在長(分離部64の端部64A,64A間の距離)や、該連設部66における下壁部分44の肉厚等を調節することで設定される。これにより、前述した通常の使用状態において想定される外力が上壁部分42を介して支持部60に付加された場合では、連設部66が折曲的または撓曲的に変形しないように設定されている。従って、通常の使用状態における当接受部62は、図3(a)および図3(b)に示すように、支持部60が内側から当接しても下壁部分44と同一平面上に姿勢保持され、通常の使用状態では上壁部分42の変形が防止される。一方、通常の使用状態において付加される外力以上の大きい外力が上壁部分42に付加された場合には、荷重を受けた連設部66の折曲的または撓曲的な変形により当接受部62がダクト本体40の外側へ変位し、前述のようにダクト本体40における上壁部分42が変形する。   The deformation load that causes bending or bending deformation of the continuous portion 66 is the extension length of the continuous portion 66 (distance between the end portions 64A and 64A of the separation portion 64) or the continuous portion. It is set by adjusting the wall thickness of the lower wall portion 44 at 66. Thereby, when the external force assumed in the normal use state mentioned above is applied to the support part 60 via the upper wall part 42, it sets so that the connection part 66 may not bend | fold or bend flexibly. Has been. Accordingly, as shown in FIGS. 3A and 3B, the contact receiving portion 62 in the normal use state maintains the posture on the same plane as the lower wall portion 44 even when the support portion 60 contacts from the inside. Thus, deformation of the upper wall portion 42 is prevented in a normal use state. On the other hand, when an external force greater than the external force applied in a normal use state is applied to the upper wall portion 42, the contact receiving portion is caused by bending or bending deformation of the continuous portion 66 that receives the load. 62 is displaced to the outside of the duct body 40, and the upper wall portion 42 of the duct body 40 is deformed as described above.

なお、図3(a)に示すように、分離部64の左右間隔H1は、支持部60の左右幅W1より大きく設定されると共に、分離部64の前後長H2は、支持部60の前後幅W2より大きく設定されている。また支持部60は、図2および図3(b)に示すように、上方から見て、分離部64および連設部66で囲まれた部分内に位置しており、該支持部60は当接受部62と上下方向において完全に重なっている。従って、上壁部分42に外力が付加された際には、下方へ移動した支持部60が、下壁部分44に接触することなく開口部68内に挿通し得る。すなわち、通常の使用状態において付加される外力より大きい外力が上壁部分42に対して上方から付加された場合には、支持部60が開口部68へ完全に挿通することで、上壁部分42は下壁部分44に接触するまで変形し得る。   As shown in FIG. 3A, the left-right distance H1 of the separation portion 64 is set to be larger than the left-right width W1 of the support portion 60, and the front-rear length H2 of the separation portion 64 is the front-rear width of the support portion 60. It is set larger than W2. As shown in FIGS. 2 and 3 (b), the support portion 60 is located in a portion surrounded by the separation portion 64 and the connecting portion 66 as viewed from above, and the support portion 60 is It completely overlaps with the contact portion 62 in the vertical direction. Therefore, when an external force is applied to the upper wall portion 42, the support portion 60 moved downward can be inserted into the opening 68 without contacting the lower wall portion 44. That is, when an external force larger than the external force applied in a normal use state is applied to the upper wall portion 42 from above, the support portion 60 is completely inserted into the opening 68 to thereby cause the upper wall portion 42 to be inserted. Can deform until it contacts the lower wall portion 44.

当接受部62のダクト本体40内に面した内側には、図1および図3(b)に示すように、不織布またはウレタン等を材質とするシート状の緩衝シート材74が貼り付けられている。この緩衝シート材74は、支持部60と当接受部62とが直接的に接触することによる異音の発生を防止するために貼り付けられている。従って支持部60は、緩衝シート材74を介して当接受部62を押すようになり、これにより上壁部分42を支持する。但し、支持部60と下壁部分44とが接触しても異音が発生しない場合や、異音の発生レベルが極小さい場合には、緩衝シート材74を貼り付ける必要はない。   As shown in FIG. 1 and FIG. 3B, a sheet-like buffer sheet material 74 made of a nonwoven fabric or urethane is attached to the inside of the contact receiving portion 62 facing the duct body 40. . This buffer sheet material 74 is affixed in order to prevent the generation of abnormal noise due to the direct contact between the support portion 60 and the contact receiving portion 62. Therefore, the support part 60 comes to push the contact receiving part 62 through the buffer sheet material 74, thereby supporting the upper wall part 42. However, if no abnormal noise is generated even if the support portion 60 and the lower wall portion 44 are in contact with each other, or if the generation level of the abnormal noise is extremely small, it is not necessary to stick the buffer sheet material 74.

また実施例の車両用吸気ダクトDは、図1〜図4に示すように、分離部64を塞ぐ被覆シート材76を該下壁部分44の外側に備えている。この被覆シート材76は、不織布やビニール等の素材から形成されると共に、当接受部62および分離部64を完全に被覆し得る外郭形状・サイズに形成され、各種の接着剤または両面テープ等により下壁部分44に接着される。但し、下壁部分44に接着された被覆シート材76は、支持部60が当接受部62を内側から押した際に、下壁部分44から剥離する接着力で該下壁部分44に接着されている。   In addition, the vehicle intake duct D according to the embodiment includes a covering sheet material 76 that closes the separating portion 64 on the outside of the lower wall portion 44 as shown in FIGS. The covering sheet material 76 is formed from a raw material such as a nonwoven fabric or vinyl, and is formed into an outer shape and size that can completely cover the contact receiving portion 62 and the separating portion 64, and can be formed by various adhesives or double-sided tapes. Bonded to the lower wall portion 44. However, the covering sheet material 76 adhered to the lower wall portion 44 is adhered to the lower wall portion 44 with an adhesive force that peels from the lower wall portion 44 when the support portion 60 pushes the contact receiving portion 62 from the inside. ing.

なお、前述した被覆シート材76は、気密性を有するものが好ましいが、不織布を素材として使用した場合には、ダクト本体40に接着する側の全面に両面テープを貼着することで、気密性を持たせることが可能である。従ってダクト本体40は、分離部64が被覆シート材76で閉塞されているので、ダクト本体40外の空気が分離部64を介してダクト本体40内へ流入することが阻止される。   The covering sheet material 76 described above preferably has airtightness. However, when a nonwoven fabric is used as the material, the double-sided tape is adhered to the entire surface on the side to be bonded to the duct main body 40, thereby airtightness. It is possible to have Accordingly, since the separation portion 64 of the duct main body 40 is closed by the covering sheet material 76, the air outside the duct main body 40 is prevented from flowing into the duct main body 40 via the separation portion 64.

従って、前述のように構成された実施例の車両用吸気ダクトDでは、上壁部分42に外力が付加された際に、上壁部分42に設けた支持部60が下壁部分44に設けた当接受部62を変位させることで、上壁部分42の変形が可能となる。すなわち、ダクト本体40における上壁部分42の変形が、支持部60の折曲的または撓曲的な圧縮変形によるものではなく、連設部66での折曲的または撓曲的な変形による当接受部62の変位によってなされるので、ダクト本体40の変形が大きくなっても反発力が殆ど高まらない。しかも、下壁部分44と該下壁部分44に設けた当接受部62とは、スリット状の分離部64により変位前から分離しているので、連設部66での折曲的または撓曲的な変形による当接受部62の変位がスムーズに進行し、通常の使用状態に付加される外力より大きい外力が上壁部分42に付加した際には該上壁部分42が適切に変形する。また、上壁部分42に対する外力の付加が解除された際には、連設部66の復帰弾力により当接受部62が元の状態に復帰しながら支持部60を押すので、ダクト本体40が元の形状に復帰することも可能である。   Therefore, in the vehicle intake duct D of the embodiment configured as described above, the support portion 60 provided on the upper wall portion 42 is provided on the lower wall portion 44 when an external force is applied to the upper wall portion 42. The upper wall portion 42 can be deformed by displacing the contact receiving portion 62. That is, the deformation of the upper wall portion 42 in the duct body 40 is not caused by the bending or bending compression deformation of the support portion 60, but by the bending or bending deformation of the connecting portion 66. Since the displacement is caused by the displacement of the contact portion 62, the repulsive force hardly increases even when the deformation of the duct body 40 is increased. In addition, since the lower wall portion 44 and the contact receiving portion 62 provided on the lower wall portion 44 are separated from each other before the displacement by the slit-like separation portion 64, bending or bending at the connecting portion 66 is performed. When the external force larger than the external force applied in the normal use state is applied to the upper wall portion 42, the upper wall portion 42 is appropriately deformed. When the external force applied to the upper wall portion 42 is released, the contact receiving portion 62 pushes the support portion 60 while the contact receiving portion 62 returns to the original state due to the return elasticity of the connecting portion 66, so that the duct body 40 is It is also possible to return to the shape.

(変更例)
図5は、変更例に係る車両用吸気ダクトDの要部を示した概略斜視図である。変更例では、下壁部分44の当接受部62を囲繞する部分に設けた分離部64を、下壁部分44の外側に有底溝を形成することで下壁部分44の肉厚より薄肉状にした薄肉部72から構成したものである。この薄肉部72は、図5(a)に示すように、当接受部62の左側縁部、後縁部および右側縁部に沿うように延設されており、該当接受部62を3/4周ほど囲繞した略U字形に延設されている。すなわち、変位前の当接受部62は、その全周に亘って下壁部分44に連設されているため、図5(b)に示すように、前述した被覆シート材76を装着しなくてもエンジンルーム12内の空気がダクト本体40内に流入することがない。そして、通常の使用状態において外力が支持部60に付加された場合には分離部64は破断せず、通常の使用状態における外力以上の外力が支持部60に付加された場合には分離部64が破断するよう薄肉部72の肉厚設定がなされている。従って、変更例の車両用吸気ダクトDでは、支持部60を設けた上壁部分42に、通常の使用状態における外力以上の大きい外力、すなわちエンジンフード14の変形に伴う外力が付加された際には分離部64が破断し、該分離部64が破断した以降は、図5(c)に示すように、前述した実施例と同様にダクト本体40の上壁部分42が変形する。
(Example of change)
FIG. 5 is a schematic perspective view showing a main part of a vehicle intake duct D according to a modified example. In the modified example, the separating portion 64 provided in the portion surrounding the contact receiving portion 62 of the lower wall portion 44 is formed thinner than the thickness of the lower wall portion 44 by forming a bottomed groove outside the lower wall portion 44. It is comprised from the thin part 72 made into. As shown in FIG. 5A, the thin-walled portion 72 extends along the left edge, the rear edge, and the right edge of the contact receiving portion 62, and the corresponding receiving portion 62 is 3/4. It extends in a substantially U shape that surrounds the circumference. That is, since the contact receiving portion 62 before displacement is connected to the lower wall portion 44 over the entire circumference thereof, as shown in FIG. In addition, the air in the engine room 12 does not flow into the duct body 40. When an external force is applied to the support portion 60 in a normal use state, the separation portion 64 does not break, and when an external force greater than the external force in a normal use state is applied to the support portion 60, the separation portion 64. The thickness of the thin portion 72 is set so as to break. Therefore, in the vehicle intake duct D of the modified example, when an external force larger than the external force in a normal use state, that is, an external force accompanying deformation of the engine hood 14 is applied to the upper wall portion 42 provided with the support portion 60. As shown in FIG. 5C, the upper wall portion 42 of the duct body 40 is deformed as shown in FIG. 5C after the separating portion 64 is broken.

実施例および変更例では、平面U字形に延在形成されたスリット70または薄肉部72からなる分離部64を例示したが、この分離部64の形態はこれに限定されない。すなわち、通常の使用状態において付加される外力以上の外力が支持部60に付加された場合に、当接受部62がダクト本体40の外側へ適切に変位するのを許容するものであればよく、例えば図6(a)に示した平面H字形に延在するよう形成したスリットまたは薄肉部や、図6(b)に示した平面X字形に延在するよう形成したスリットまたは薄肉部等であってもよい。   In the embodiment and the modification, the separation part 64 including the slit 70 or the thin part 72 that is formed to extend in a plane U shape is illustrated, but the form of the separation part 64 is not limited thereto. That is, it is only necessary to allow the contact receiving portion 62 to be appropriately displaced to the outside of the duct body 40 when an external force greater than the external force applied in the normal use state is applied to the support portion 60. For example, the slit or thin portion formed so as to extend in the plane H shape shown in FIG. 6A, the slit or thin portion formed so as to extend in the plane X shape shown in FIG. May be.

実施例および変更例では、上部壁体42に一体成形された支持部60を例示したが、この支持部60は、図7(a)および図7(b)に示すように、上部壁体42と別体に構成してもよい。図7(a)は、上壁部分42と別体に形成した支持部60を、該上壁部分42の内側に取り付けた形態を示し、図7(b)は、上壁部分42と別体に形成した支持部60を、該上壁部分42の外側から取り付けた形態を示している。なお、上壁部分42に対する支持部60の固定は、溶着または接着、ネジ等の固定手段等が利用される。また、上壁部分42と支持部60とを別体構成とした場合には、該支持部60をダクト本体40とは別の素材から形成することが可能となる。   In the embodiment and the modification, the support portion 60 integrally formed on the upper wall body 42 is illustrated. However, as shown in FIGS. 7A and 7B, the support portion 60 is formed by the upper wall body 42. And may be configured separately. FIG. 7A shows a form in which a support portion 60 formed separately from the upper wall portion 42 is attached to the inside of the upper wall portion 42, and FIG. 7B shows a configuration separate from the upper wall portion 42. The form which attached the support part 60 formed in 3 from the outer side of this upper wall part 42 is shown. For fixing the support portion 60 to the upper wall portion 42, fixing means such as welding or adhesion, screws, or the like is used. Further, when the upper wall portion 42 and the support portion 60 are configured separately, the support portion 60 can be formed from a material different from that of the duct main body 40.

また、実施例および変更例では、上壁部分42の肉厚と略同一の肉厚とした支持部60を例示したが、該支持部60の形態はこれに限定されず、上壁部分42より薄肉に構成したり、または中実状に構成してもよい。   Further, in the example and the modified example, the support portion 60 having the same thickness as the thickness of the upper wall portion 42 is illustrated, but the form of the support portion 60 is not limited to this, and is higher than that of the upper wall portion 42. You may comprise thinly or you may comprise in a solid state.

実施例の車両用吸気ダクトを車体前側に取り付けた状態を示した斜視図である。It is the perspective view which showed the state which attached the vehicle intake duct of the Example to the vehicle body front side. 図1のII−II線断面図である。It is the II-II sectional view taken on the line of FIG. (a)は、ダクト本体に設けた支持部、分離部および連設部を示した部分斜視図であり、(b)は、(a)のIIIb−IIIb線断面図であり、(c)は、連設部の変形により当接受部がダクト本体の外側へ変位し、支持部がダクト本体の外側へ突出した状態を示した斜視図である。(a) is the fragmentary perspective view which showed the support part provided in the duct main body, the isolation | separation part, and the connection part, (b) is the IIIb-IIIb sectional view taken on the line of (a), (c) is FIG. 5 is a perspective view showing a state in which the contact receiving portion is displaced to the outside of the duct body due to the deformation of the continuous portion, and the support portion is projected to the outside of the duct body. エンジンフードの変形による外力が上壁部分に付加されることでダクト本体が変形した状態を示した側断面図である。It is the sectional side view which showed the state which the duct main body deform | transformed by applying the external force by a deformation | transformation of an engine hood to an upper wall part. (a)は、ダクト本体に設けた支持部、別形態の分離部および連設部を示した部分斜視図であり、(b)は、(a)のVb−Vb線断面図であり、(c)は、分離部が破断して、連設部の変形により当接受部がダクト本体の外側へ変位し、支持部がダクト本体の外側へ突出した状態を示した斜視図である。(a) is the fragmentary perspective view which showed the support part provided in the duct main body, the separation part of another form, and the connection part, (b) is the Vb-Vb sectional view taken on the line of (a), c) is a perspective view showing a state in which the separating portion is broken, the contact receiving portion is displaced to the outside of the duct body due to the deformation of the continuous portion, and the support portion is projected to the outside of the duct body. 分離部の更に別形態を示した斜視図であって、(a)は、平面H字形のスリットからなる分離部を示し、(b)は、平面X字形のスリットからなる分離部を示している。It is the perspective view which showed another form of the isolation | separation part, (a) shows the isolation | separation part which consists of a plane H-shaped slit, (b) has shown the isolation | separation part which consists of a plane X-shaped slit. . ダクト本体と別体に構成した支持部を示した側断面図であって、(a)は、上壁部分の内側に支持部を固定した形態を示し、(b)は、上壁部分に設けた開口部を介して該上壁部分の外側に支持部を固定した形態を示している。It is side sectional drawing which showed the support part comprised separately from the duct main body, Comprising: (a) shows the form which fixed the support part inside the upper wall part, (b) is provided in the upper wall part The form which fixed the support part to the outer side of this upper wall part through the opened opening part is shown. 車両におけるエンジンルーム内を略示した斜視図である。1 is a perspective view schematically showing the inside of an engine room in a vehicle. 図8のX−X線断面図である。It is the XX sectional view taken on the line of FIG. 図8に例示した従来の車両用吸気ダクトの一部破断斜視図である。FIG. 9 is a partially broken perspective view of the conventional vehicle air intake duct illustrated in FIG. 8. 図10に例示した従来の車両用吸気ダクトを車両前側に組み付けた状態を、エンジンフードの変形前状態で示した側断面図である。It is the sectional side view which showed the state which assembled | attached the conventional vehicle intake duct illustrated in FIG. 10 to the vehicle front side in the state before a deformation | transformation of an engine hood. 図10に例示した従来の車両用吸気ダクトを車両前側に組み付けた状態を、エンジンフードの変形に伴う外力が付加された状態で示した側断面図である。It is the sectional side view which showed the state which assembled | attached the conventional vehicle intake duct illustrated in FIG. 10 to the vehicle front side in the state to which the external force accompanying a deformation | transformation of an engine hood was added.

符号の説明Explanation of symbols

42 上壁部分(第1壁体),44 下壁部分(第2壁体),40 ダクト本体
60 支持部,62 当接受部,64 分離部,66 連設部
42 upper wall portion (first wall body), 44 lower wall portion (second wall body), 40 duct body 60 support portion, 62 contact receiving portion, 64 separating portion, 66 connecting portion

Claims (3)

互いに対向する第1壁体および第2壁体を有するダクト本体を備えた車両用吸気ダクトにおいて、
前記第1壁体における前記ダクト本体内に設けられ、第1壁体から前記第2壁体に向けて突出する支持部と、
前記第2壁体における前記支持部に対向する部位に設けられ、支持部と当したもとに前記第1壁体を支持する当接受部と、
前記当接受部と前記第2壁体とを分離する分離部と、
前記分離部の端部間に設けられて前記当接受部および前記第2壁体を接続し、当接受部に前記支持部が当接して荷重を受けた際に変形して、当接受部が前記ダクト本体の外側へ変位するのを許容する連設部とを備える
ことを特徴とする車両用吸気ダクト。
In the vehicle intake duct including a duct body having a first wall body and a second wall body facing each other,
A support portion provided in the duct body in the first wall body and projecting from the first wall body toward the second wall body;
Provided in a portion opposite to the supporting portion of the second wall, and the abutting receiving portion supporting the first wall to Moto the support portion and the abutment,
A separation part for separating the contact receiving part and the second wall body;
The contact receiving portion and the second wall body are provided between the end portions of the separation portion, and deformed when the support portion comes into contact with the contact receiving portion and receives a load. An air intake duct for a vehicle, comprising: a connecting portion that allows displacement to the outside of the duct body.
前記分離部は、前記第2壁体を貫通するスリット状に形成された請求項1記載の車両用吸気ダクト。   The vehicle intake duct according to claim 1, wherein the separation portion is formed in a slit shape penetrating the second wall body. 前記分離部は、前記支持部が前記当接壁部を押した際に破断する薄肉状に形成された請求項1記載の車両用吸気ダクト。   The vehicle intake duct according to claim 1, wherein the separation portion is formed in a thin shape that is broken when the support portion pushes the abutting wall portion.
JP2007330638A 2007-12-21 2007-12-21 Intake duct for vehicle Expired - Fee Related JP5014973B2 (en)

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