JP5177104B2 - Duct structure - Google Patents

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JP5177104B2
JP5177104B2 JP2009219233A JP2009219233A JP5177104B2 JP 5177104 B2 JP5177104 B2 JP 5177104B2 JP 2009219233 A JP2009219233 A JP 2009219233A JP 2009219233 A JP2009219233 A JP 2009219233A JP 5177104 B2 JP5177104 B2 JP 5177104B2
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duct
wall portion
instrument panel
pressure receiving
reinforcing
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JP2011068202A (en
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直行 福井
晃 堀山
公俊 井村
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Toyoda Gosei Co Ltd
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Description

本発明は、車両に配設されるダクト構造体に関し、詳しくはインストルメントパネルと、その下方に配置される空調用ダクトと、を持つダクト構造体に関する。   The present invention relates to a duct structure disposed in a vehicle, and more particularly to a duct structure having an instrument panel and an air conditioning duct disposed below the instrument panel.

近年、燃費を向上するために、車両の軽量化が望まれている。車両に配設されているインストルメントパネル（以下、単にインパネと略する）に関しても、軽量化のために薄型のものが望まれている。薄型のインパネは、厚型のインパネに比べて剛性が低い。このため、例えばユーザーがインパネに勢いよく手をつき体重をかけた場合などには、インパネが変形するおそれがある。したがってインパネの強度向上のため、インパネを補強する種々の技術が提案されている。   In recent years, it has been desired to reduce the weight of vehicles in order to improve fuel efficiency. As for an instrument panel (hereinafter simply referred to as an instrument panel) disposed in a vehicle, a thin panel is desired for weight reduction. The thin instrument panel is less rigid than the thick instrument panel. For this reason, for example, when the user puts his / her hand on the instrument panel and puts weight on it, the instrument panel may be deformed. Therefore, various techniques for reinforcing the instrument panel have been proposed to improve the strength of the instrument panel.

特許文献１には、インパネ下方に配置されている空調用ダクトの一部をインパネの下面（裏面）に溶着することで、空調用ダクトによってインパネを補強する技術が紹介されている。   Patent Document 1 introduces a technique for reinforcing an instrument panel with an air conditioning duct by welding a part of the air conditioning duct disposed below the instrument panel to the lower surface (back surface) of the instrument panel.

ところで、一般に、インストルメントパネルの下方には様々な装置や部材（例えば空調用ダクトや、カーステレオやカーナビゲーションシステムおよびその配線等）が配設される。このため、インストルメントパネルの下方における空調用ダクトの配設スペースは限られており、空調用ダクトの形状の自由度は低い。例えば、インパネの下方に配置される他の構造体との関係で空調用ダクトのための上下方向の配設スペースが小さい場合には、空調用ダクトを薄型（上下方向の長さの短い形状）にする必要がある。この場合、空調用ダクトの流路断面積を充分な大きさにするために、空調用ダクトの幅方向の長さ（軸方向に直交する方向の長さ）は、上下方向の長さに対して非常に長くなる。幅方向の長さが長ければ長いほど、空調用ダクト自体の剛性が低下するため、空調用ダクトによってインパネを充分に補強し難くなる。   By the way, in general, various devices and members (for example, air conditioning ducts, car stereos, car navigation systems, and wiring thereof) are disposed below the instrument panel. For this reason, the arrangement space of the air-conditioning duct below the instrument panel is limited, and the degree of freedom of the shape of the air-conditioning duct is low. For example, when the vertical arrangement space for the air conditioning duct is small in relation to other structures disposed below the instrument panel, the air conditioning duct is thin (a shape with a short vertical length). It is necessary to. In this case, in order to make the flow path cross-sectional area of the air conditioning duct sufficiently large, the length in the width direction of the air conditioning duct (the length in the direction orthogonal to the axial direction) is Become very long. The longer the length in the width direction, the lower the rigidity of the air conditioning duct itself, making it difficult to sufficiently reinforce the instrument panel by the air conditioning duct.

空調用ダクトを厚肉にすれば、空調用ダクトの剛性が向上するために、薄型の空調用ダクトによってもインパネを補強できると考えられる。しかしこの場合には、空調用ダクトの質量が大きくなり、上述した車両の軽量化に反する問題がある。   If the air-conditioning duct is made thick, the rigidity of the air-conditioning duct is improved, so that the instrument panel can be reinforced by a thin air-conditioning duct. However, in this case, the mass of the air-conditioning duct increases, and there is a problem against the above-described weight reduction of the vehicle.

特開２００１−３０１４９０号公報JP 2001-301490 A

本発明は上記事情に鑑みてなされたものであり、インパネと空調用ダクトとを持ち、空調用ダクトによってインパネを補強できかつ空調用ダクトの質量増大を抑制できるダクト構造体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 has an object to provide a duct structure that has an instrument panel and an air conditioning duct, can reinforce the instrument panel by the air conditioning duct, and can suppress an increase in the mass of the air conditioning duct. And

上記課題を解決する本発明のダクト構造体は、車両用インストルメントパネルと該インストルメントパネルの裏面側に配置されている空調用ダクトと、を持つダクト構造体であって、該空調用ダクトは、該インストルメントパネルに対面する第１ダクト壁部と、該第１ダクト壁部と離間しつつ該第１ダクト壁部に対面する第２ダクト壁部と、を持ち筒状をなすダクト本体と、該第１ダクト壁部に対面する第１受圧壁部と、該第２ダクト壁部に対面する第２受圧壁部と、該第１受圧壁部と該第２受圧壁部とに一体化されている少なくとも１つの補強壁部と、を持ち、ダクト本体の内部に配置され、該ダクト本体よりも剛性の高い補強体と、を持ち、該インストルメントパネルのなかで該第１受圧壁部に対面する部分は、下方に突起するリブを持つことを特徴とする。 The duct structure of the present invention that solves the above problems is a duct structure having an instrument panel for a vehicle and an air conditioning duct arranged on the back side of the instrument panel, the duct for air conditioning being A duct main body having a first duct wall portion facing the instrument panel and a second duct wall portion facing the first duct wall portion while being spaced apart from the first duct wall portion; The first pressure receiving wall portion facing the first duct wall portion, the second pressure receiving wall portion facing the second duct wall portion, and the first pressure receiving wall portion and the second pressure receiving wall portion are integrated with each other. is has at least one reinforcing walls are disposed inside the duct body, Chi lifting and a high reinforcement rigidity than the duct body, said first pressure receiving wall among the instrument panel portion facing the parts are lifting ribs protruding downward It is characterized in.

本発明のダクト構造体は、下記の（５）を備える。本発明のダクト構造体は、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。 The duct structure of the present invention includes the following (5). Duct structure of the present invention preferably comprise any of the following (1) to (4), (1) is more preferably provided with a plurality of - (4).

（１）前記補強体は、前記ダクト本体の材料よりも剛性の高い材料からなる。   (1) The reinforcing body is made of a material having rigidity higher than that of the duct body.

（２）前記補強体は、前記ダクト本体よりも厚肉である。   (2) The reinforcing body is thicker than the duct body.

（３）前記補強壁部は前記第１受圧壁部と直交する方向に延びる。   (3) The reinforcing wall portion extends in a direction orthogonal to the first pressure receiving wall portion.

（４）前記補強体は１つのみの前記補強壁部を持ち、前記補強壁部は、前記ダクト本体の軸方向に延び、該軸方向と直交する方向である幅方向において、前記第１受圧壁部の端部以外の部分に一体化されるとともに、前記第２受圧壁部の端部以外の部分に一体化されている。   (4) The reinforcing body has only one reinforcing wall portion, and the reinforcing wall portion extends in the axial direction of the duct body, and the first pressure receiving pressure in a width direction that is a direction orthogonal to the axial direction. In addition to being integrated with a portion other than the end portion of the wall portion, it is integrated with a portion other than the end portion of the second pressure receiving wall portion.

（５）前記インストルメントパネルのなかで前記第１受圧壁部に対面する部分は、下方に突起するリブを持つ。   (5) A portion of the instrument panel that faces the first pressure receiving wall has a rib protruding downward.

本発明のダクト構造体における空調用ダクトは、ダクト本体と補強体とを持つ。補強体は、ダクト本体よりも高剛性である。また、補強体はダクト本体の内部に配置されているためダクト本体よりも小型であるため、剛性に優れる。このため、本発明のダクト構造体は、補強体によってインパネを補強できる。また、補強体によってインパネを補強することで、ダクト本体を厚肉にしなくてもよくなり、空調用ダクトの質量増大を抑制できる。   The duct for air conditioning in the duct structure of the present invention has a duct body and a reinforcing body. The reinforcing body is more rigid than the duct body. In addition, since the reinforcing body is disposed inside the duct body and is smaller than the duct body, it has excellent rigidity. For this reason, the duct structure of this invention can reinforce an instrument panel with a reinforcement. Further, by reinforcing the instrument panel with the reinforcing body, it is not necessary to make the duct main body thick, and an increase in the mass of the air conditioning duct can be suppressed.

上記（１）〜（２）を備える本発明のダクト構造体における補強体は高剛性であり、インパネを補強できる。   The reinforcing body in the duct structure of the present invention having the above (1) to (2) is highly rigid and can reinforce the instrument panel.

上記（３）を備える本発明のダクト構造体において、補強体の補強壁部は、第１受圧壁部に入力される力に対して平行な方向（または平行だと考えられる方向）に配置される。このため、上記（３）を備える本発明のダクト構造体によると、インパネ→ダクト本体の第１壁部→補強体の第１受圧壁部の順に伝達し補強壁部に作用した力による補強壁部の変形を抑制できる。このため補強壁部は、比較的大きな加重に耐えることができる。よって、上記（３）を備える本発明のダクト構造体によると、補強体によってインパネを信頼性高く補強できる。   In the duct structure of the present invention having the above (3), the reinforcing wall portion of the reinforcing body is arranged in a direction parallel to the force input to the first pressure receiving wall portion (or a direction considered to be parallel). The For this reason, according to the duct structure of the present invention having the above (3), the reinforcing wall by the force acting on the reinforcing wall portion is transmitted in the order of the instrument panel → the first wall portion of the duct body → the first pressure receiving wall portion of the reinforcing body. The deformation of the part can be suppressed. For this reason, the reinforcing wall can withstand a relatively large load. Therefore, according to the duct structure of the present invention provided with the above (3), the instrument panel can be reinforced with high reliability by the reinforcing body.

上記（４）を備える本発明のダクト構造体によると、補強体の補強壁部を１つのみにしたことで、補強体をさらに軽量化できる。また、補強壁部を補強体の幅方向の端部を避けた場所に配置したことで、第１受圧壁部および第２受圧壁部の変形を抑制できる。このため補強体は、軽量でありかつ比較的大きな加重に耐えることができる。よって、上記（４）を備える本発明のダクト構造体によると、空調用ダクトの質量増大を抑制でき、かつ、インパネを信頼性高く補強できる。   According to the duct structure of the present invention having the above (4), the reinforcement body can be further reduced in weight by having only one reinforcement wall portion of the reinforcement body. Moreover, the deformation | transformation of a 1st pressure receiving wall part and a 2nd pressure receiving wall part can be suppressed by arrange | positioning the reinforcing wall part in the place which avoided the edge part of the width direction of a reinforcement body. For this reason, the reinforcing body is lightweight and can withstand a relatively large load. Therefore, according to the duct structure of the present invention having the above (4), an increase in the mass of the air conditioning duct can be suppressed, and the instrument panel can be reinforced with high reliability.

なお、本発明のダクト構造は、上記（５）を備えるため、インパネに加わった加重を補強体に効率良く伝達できる。このため、補強体によってインパネを信頼性高く補強できる。 In addition, since the duct structure of this invention is provided with said (5), the weight added to the instrument panel can be efficiently transmitted to a reinforcement body. For this reason, the instrument panel can be reinforced with reliability by the reinforcing body.

実施例１のダクト構造体における一方の空調用ダクトを模式的に表す斜視図である。FIG. 3 is a perspective view schematically illustrating one air conditioning duct in the duct structure according to the first embodiment. 実施例１のダクト構造体を図１中Ａ−Ａ位置に相当する位置で切断した様子を模式的に表す断面図である。It is sectional drawing which represents typically a mode that the duct structure of Example 1 was cut | disconnected in the position corresponded to the AA position in FIG. 実施例１のダクト構造体を図１中Ｂ−Ｂ位置に相当する位置で切断した様子を模式的に表す断面図である。It is sectional drawing which represents typically a mode that the duct structure of Example 1 was cut | disconnected in the position corresponded to the BB position in FIG. 実施例２のダクト構造体を図３と同位置で切断した様子を模式的に表す断面図である。It is sectional drawing which represents typically a mode that the duct structure of Example 2 was cut | disconnected in the same position as FIG. 実施例３のダクト構造体を図３と同位置で切断した様子を模式的に表す断面図である。It is sectional drawing which represents typically a mode that the duct structure of Example 3 was cut | disconnected in the same position as FIG.

本発明のダクト構造体は、インパネと空調用ダクトとを持てば良く、インパネおよび空調用ダクトの個数は特に問わない。また、その他の装置や部材の一部または全体を持っても良い。空調用ダクトは、空調装置に接続され、空調装置から車室内への空調空気の流路となる部材である。車両に搭載されインパネの裏面側に配置される空調用ダクトとしては、サイドベントダクトやセンタベントダクト、デフダクトが挙げられる。   The duct structure of the present invention may have an instrument panel and an air conditioning duct, and the number of instrument panels and air conditioning ducts is not particularly limited. Moreover, you may have a part or all of another apparatus or member. The air conditioning duct is a member that is connected to the air conditioner and serves as a flow path of the conditioned air from the air conditioner to the vehicle interior. Examples of the air conditioning duct mounted on the vehicle and disposed on the back side of the instrument panel include a side vent duct, a center vent duct, and a differential duct.

なお、サイドベントダクトは、空調装置とサイドレジスタとを接続するダクトである。センタベントダクトは、空調装置とセンタレジスタとを接続するダクトである。デフダクトは、空調装置とデフロスタとを接続するダクトである。これらのダクトは、空調装置に直接接続されても良いし、他のダクトを介して間接的に接続されても良い。レジスタは、空調空気の車室内への吹き出し口を構成するとともに車室内に向けた空調空気の吹き出し方向（風向）調整する部材である。サイドレジスタはインパネにおける車幅方向の２端部にそれぞれ取り付けられているレジスタであり、センタレジスタはインパネにおける車幅方向の略中央部に取り付けられているレジスタである。デフロスタはインパネにおける車両進行方向の先側（車両前側）に取り付けられ、フロントガラスに向けた空調空気の吹き出し口を構成する部材である。   In addition, a side vent duct is a duct which connects an air conditioner and a side register. The center vent duct is a duct connecting the air conditioner and the center register. The differential duct is a duct that connects the air conditioner and the defroster. These ducts may be directly connected to the air conditioner or indirectly connected via other ducts. The register is a member that constitutes a blowout port for the conditioned air into the vehicle interior and adjusts the blowout direction (wind direction) of the conditioned air toward the vehicle interior. The side register is a register attached to each of two end portions of the instrument panel in the vehicle width direction, and the center register is a register attached to a substantially central portion of the instrument panel in the vehicle width direction. The defroster is a member that is attached to the front side (front side of the vehicle) of the instrument panel in the vehicle traveling direction and constitutes a blowout port for conditioned air toward the windshield.

なお、本願のダクト構造体が、空調装置に接続されているダクト（すなわち上述したサイドベントダクト、センタベントダクト、デフロスタ）を２個以上持つ場合、全てのダクトが補強体を持っても良いし、一部のダクトのみが補強体を持っても良い。この場合、補強体を持つダクトが本発明における空調用ダクトに相当する。   When the duct structure of the present application has two or more ducts connected to the air conditioner (that is, the side vent duct, the center vent duct, and the defroster described above), all the ducts may have a reinforcing body. Only some of the ducts may have reinforcements. In this case, the duct having the reinforcing body corresponds to the air conditioning duct in the present invention.

補強体の剛性は、ダクト本体の剛性よりも高ければ良い。例えば、補強体を厚肉にしたり、補強体の材料をダクト本体の材料よりも剛性の高い材料にすることで、補強体の剛性をダクト本体の剛性よりも高めることができる。ダクト本体を樹脂製にする場合には、例えば補強体の材料として、アルミニウム、マグネシウム、鉄、鉄合金（ステンレススチールを含む）から選ばれる少なくとも一種の材料を選択するのが好ましい。これらの材料は高剛性かつ軽量であるためである。   The rigidity of the reinforcing body only needs to be higher than the rigidity of the duct body. For example, the rigidity of the reinforcing body can be made higher than the rigidity of the duct body by making the reinforcing body thicker or by using a material of the reinforcing body that is higher in rigidity than the material of the duct body. When the duct body is made of resin, for example, it is preferable to select at least one material selected from aluminum, magnesium, iron, and iron alloys (including stainless steel) as the material of the reinforcing body. This is because these materials are highly rigid and lightweight.

以下、図面を基に、本発明のダクト構造体を説明する。   Hereinafter, the duct structure of the present invention will be described with reference to the drawings.

（実施例１）
実施例１のダクト構造体は、１つのインパネと２つの空調用ダクトとを持つ。実施例１のダクト構造体における一方の空調用ダクトを模式的に表す斜視図を図１に示す。実施例１のダクト構造体を図１中Ａ−Ａ位置に相当する位置で切断した様子を模式的に表す断面図を図２に示す。実施例１のダクト構造体を図１中Ｂ−Ｂ位置に相当する位置で切断した様子を模式的に表す断面図を図３に示す。以下、上、下、左、右、前、後とは図１に示す上、下、左、右、前、後を指す。車幅方向とは図１中左右方向を指し、車両進行方向とは図１中前後方向を指す。空調用ダクトの高さ方向とは図１中上下方向を指す。なお、空調用ダクトの幅方向は空調用ダクトの軸線方向（および上下方向）に交差する方向であり、図１中前後方向とほぼ同じ方向である。 Example 1
The duct structure of the first embodiment has one instrument panel and two air conditioning ducts. FIG. 1 is a perspective view schematically showing one air conditioning duct in the duct structure according to the first embodiment. FIG. 2 is a cross-sectional view schematically showing a state in which the duct structure of Example 1 is cut at a position corresponding to the position AA in FIG. FIG. 3 is a cross-sectional view schematically showing a state in which the duct structure of Example 1 is cut at a position corresponding to the position BB in FIG. Hereinafter, the terms “up”, “down”, “left”, “right”, “front”, and “rear” refer to the upper, lower, left, right, front, and rear shown in FIG. The vehicle width direction refers to the left-right direction in FIG. 1, and the vehicle traveling direction refers to the front-rear direction in FIG. The height direction of the air conditioning duct refers to the vertical direction in FIG. The width direction of the air conditioning duct is a direction that intersects the axial direction (and the vertical direction) of the air conditioning duct, and is substantially the same as the front-rear direction in FIG.

実施例１のダクト構造体は、インパネ１と、２つのサイドベントダクト２とを持つ。一方のサイドベントダクト２である第１サイドベントダクト（図１に示す）は、インパネ１の右側に取り付けられているサイドレジスタ（図略）と後述する分岐ダクト（図略）とに接続されている。他方のサイドベントダクト２である第２サイドベントダクト（図略）は、インパネ１の左側に取り付けられているサイドレジスタ（図略）と分岐ダクト（図略）とに接続されている。分岐ダクトは、図略の空調装置に接続されている。第１サイドベントダクトおよび第２サイドベントダクトは、それぞれ、補強体３を持つ。したがって、２つのサイドベントダクト２は本発明における空調用ダクトに相当する。以下、第１サイドベントダクトと第２サイドベントダクトとを総称して空調用ダクト２と呼ぶ。第１サイドベントダクトと第２サイドベントダクトとは左右対称な形状をなす。   The duct structure of the first embodiment has an instrument panel 1 and two side vent ducts 2. A first side vent duct (shown in FIG. 1), which is one side vent duct 2, is connected to a side register (not shown) attached to the right side of the instrument panel 1 and a branch duct (not shown) described later. Yes. A second side vent duct (not shown) which is the other side vent duct 2 is connected to a side register (not shown) and a branch duct (not shown) attached to the left side of the instrument panel 1. The branch duct is connected to an air conditioner (not shown). Each of the first side vent duct and the second side vent duct has a reinforcing body 3. Therefore, the two side vent ducts 2 correspond to air conditioning ducts in the present invention. Hereinafter, the first side vent duct and the second side vent duct are collectively referred to as an air conditioning duct 2. The first side vent duct and the second side vent duct have a symmetrical shape.

図２および図３に示すように、各空調用ダクト２はインパネ１の裏面（下面）と空調装置（図略）のブラケット８との間に配置されている。インパネ１は樹脂製であり、略板状をなす。インパネ１の上面（表面）は車室内に露出している。インパネ１の左側部分と右側部分とに、それぞれ、下方に突起し前後方向に延びる２つのリブ１０が形成されている。   As shown in FIGS. 2 and 3, each air conditioning duct 2 is arranged between the back surface (lower surface) of the instrument panel 1 and a bracket 8 of an air conditioner (not shown). The instrument panel 1 is made of resin and has a substantially plate shape. The upper surface (surface) of the instrument panel 1 is exposed in the passenger compartment. Two ribs 10 projecting downward and extending in the front-rear direction are respectively formed on the left and right portions of the instrument panel 1.

各空調用ダクト２はダクト本体４と補強体３とを持つ。ダクト本体４は樹脂製であり略角筒状をなす。ダクト本体４の高さ（上下方向の長さ）は、幅（前後方向の長さ）よりも短い。ダクト本体４の肉厚は略一定である。ダクト本体４はブロー成形されてなる。   Each air conditioning duct 2 has a duct body 4 and a reinforcing body 3. The duct body 4 is made of resin and has a substantially rectangular tube shape. The height (vertical length) of the duct body 4 is shorter than the width (length in the front-rear direction). The thickness of the duct body 4 is substantially constant. The duct body 4 is formed by blow molding.

ダクト本体４は、車両に取り付けられた状態において、概ね左右方向に延びる。各ダクト本体４の一端である第１端部４０は、車幅方向の略中央部に配設されている分岐ダクトを介して空調装置に接続される。各ダクト本体４の他端である第２端部４１はサイドレジスタに接続される。   The duct body 4 extends substantially in the left-right direction when attached to the vehicle. The first end 40, which is one end of each duct body 4, is connected to the air conditioner via a branch duct disposed at a substantially central portion in the vehicle width direction. A second end 41 that is the other end of each duct body 4 is connected to a side register.

ダクト本体４の上壁（第１ダクト壁部４２）はインパネ１の裏面（下面）に対面する。ダクト本体４の下壁（第２ダクト壁部４３）は、第１ダクト壁部４２と離間するとともに第１ダクト壁部４２に対面する。第１ダクト壁部４２は、第１端部４０の近傍に位置し上方に***する部分（第１保持壁部４４）を持つ。第２ダクト壁部４３は、第１端部４０の近傍に位置し下方に***する部分（第２保持壁部４５）を持つ。第１保持壁部４４と第２保持壁部４５とは互いに対面している。第１保持壁部４４と第２保持壁部４５との間には、補強体３が挿入保持されている。   The upper wall (first duct wall portion 42) of the duct body 4 faces the back surface (lower surface) of the instrument panel 1. The lower wall (second duct wall portion 43) of the duct body 4 is separated from the first duct wall portion 42 and faces the first duct wall portion 42. The first duct wall portion 42 has a portion (first holding wall portion 44) that is located in the vicinity of the first end portion 40 and protrudes upward. The 2nd duct wall part 43 has the part (2nd holding wall part 45) which is located in the vicinity of the 1st edge part 40, and protrudes below. The first holding wall portion 44 and the second holding wall portion 45 face each other. The reinforcing body 3 is inserted and held between the first holding wall portion 44 and the second holding wall portion 45.

補強体３はアルミニウム製であり略角筒状をなす。補強体３は、第１受圧壁部３０と第２受圧壁部３１と、２つの補強壁部３２とを持つ。第１受圧壁部３０は補強体３の上壁であり、第２受圧壁部３１は補強体３の下壁である。補強壁部３２は補強体３の側壁である。第１受圧壁部３０と第２受圧壁部３１とは互いに平行に配置され、かつ、互いに離間している。第１受圧壁部３０はダクト本体４の第１ダクト壁部４２（詳しくは第１保持壁部４４）に対面し、当接している。第２受圧壁部３１はダクト本体４の第２ダクト壁部４３（詳しくは第２保持壁部４５）に対面し、当接している。２つの補強壁部３２は、第１受圧壁部３０および第２受圧壁部３１と直交する方向（上下方向）に延び第１受圧壁部３０と第２受圧壁部３１とに一体化されている。   The reinforcing body 3 is made of aluminum and has a substantially rectangular tube shape. The reinforcing body 3 has a first pressure receiving wall portion 30, a second pressure receiving wall portion 31, and two reinforcing wall portions 32. The first pressure receiving wall portion 30 is the upper wall of the reinforcing body 3, and the second pressure receiving wall portion 31 is the lower wall of the reinforcing body 3. The reinforcing wall portion 32 is a side wall of the reinforcing body 3. The first pressure receiving wall portion 30 and the second pressure receiving wall portion 31 are arranged in parallel to each other and are separated from each other. The first pressure receiving wall 30 faces and contacts the first duct wall 42 (specifically, the first holding wall 44) of the duct body 4. The second pressure receiving wall portion 31 faces and contacts the second duct wall portion 43 (specifically, the second holding wall portion 45) of the duct body 4. The two reinforcing wall portions 32 extend in a direction (vertical direction) orthogonal to the first pressure receiving wall portion 30 and the second pressure receiving wall portion 31 and are integrated with the first pressure receiving wall portion 30 and the second pressure receiving wall portion 31. Yes.

補強体３の軸方向の長さは空調用ダクト２の軸方向の長さよりもはるかに短い。補強体３の高さ方向の長さは、空調用ダクト２の高さ方向の長さよりも僅かに短い。１受圧壁部の長さおよび第２受圧壁部３１の長さは、空調用ダクト２の幅方向の長さよりも短く、補強体３の幅方向の長さは空調用ダクト２の幅方向の長さよりも短い。なお、実施例１のダクト構造体においては、補強体３の幅方向の長さは空調用ダクト２の幅方向の長さの１／５程度である。補強体３の肉厚（すなわち、第１受圧壁部３０、第２受圧壁部３１、および補強壁部３２の肉厚）は、略一定である。また、補強体３の肉厚はダクト本体４の肉厚よりも大きい。   The axial length of the reinforcing body 3 is much shorter than the axial length of the air conditioning duct 2. The length of the reinforcing body 3 in the height direction is slightly shorter than the length of the air conditioning duct 2 in the height direction. The length of the first pressure receiving wall portion and the length of the second pressure receiving wall portion 31 are shorter than the length in the width direction of the air conditioning duct 2, and the length in the width direction of the reinforcing body 3 is the width direction of the air conditioning duct 2. Shorter than length. In the duct structure of Example 1, the length in the width direction of the reinforcing body 3 is about 1/5 of the length in the width direction of the air conditioning duct 2. The thickness of the reinforcing body 3 (that is, the thickness of the first pressure receiving wall portion 30, the second pressure receiving wall portion 31, and the reinforcing wall portion 32) is substantially constant. Further, the thickness of the reinforcing body 3 is larger than the thickness of the duct body 4.

図２および図３に示すように、補強体３の第１受圧壁部３０は、ダクト本体４の第１ダクト壁部４２（詳しくは第１保持壁部４４）にリベット９で止着されている。第１保持壁部４４の上面には第１のクッション材７０（フェルト）が貼り付けられている。第１のクッション材７０はインパネ１のリブ１０に当接している。したがって、第１のクッション材７０は、インパネ１のリブ１０と第１保持壁部４４との間に介在している。第１のクッション材７０が介在することで、インパネ１と第１保持壁部４４とのガタつきが抑制されている。第２保持壁部４５の下面には第２のクッション材７１（ウレタン）が貼り付けられている。空調装置のブラケット８のなかで第２のクッション材７１に対面する部分には第３のクッション材７２（フェルト）が貼り付けられている。第２のクッション材７１と第３のクッション材７２とは当接している。したがって、第２のクッション材７１および第３のクッション材７２は、第２保持壁部４５と空調装置のブラケット８の間に介在している。第２のクッション材７１および第３のクッション材７２が介在することで、第２保持壁部４５と空調装置のブラケット８とのガタつきが抑制されている。   As shown in FIGS. 2 and 3, the first pressure receiving wall portion 30 of the reinforcing body 3 is fixed to the first duct wall portion 42 (specifically, the first holding wall portion 44) of the duct body 4 with the rivets 9. Yes. A first cushion material 70 (felt) is attached to the upper surface of the first holding wall portion 44. The first cushion material 70 is in contact with the rib 10 of the instrument panel 1. Therefore, the first cushion material 70 is interposed between the rib 10 of the instrument panel 1 and the first holding wall portion 44. The backlash between the instrument panel 1 and the first holding wall 44 is suppressed by interposing the first cushion material 70. A second cushion material 71 (urethane) is affixed to the lower surface of the second holding wall portion 45. A third cushion material 72 (felt) is attached to a portion of the bracket 8 of the air conditioner that faces the second cushion material 71. The second cushion material 71 and the third cushion material 72 are in contact with each other. Therefore, the second cushion material 71 and the third cushion material 72 are interposed between the second holding wall portion 45 and the bracket 8 of the air conditioner. Since the second cushion material 71 and the third cushion material 72 are interposed, the play between the second holding wall portion 45 and the bracket 8 of the air conditioner is suppressed.

なお、図示しないが、実施例１のダクト構造体は空調用ダクト２および上述した分岐ダクト以外のダクトを３つ持つ。このうち２つのダクトは、各々、分岐ダクトとセンタレジスタ（図略）とを接続するセンタベントダクトである。他の１つのダクトは、分岐ダクトとデフロスタ（図略）とを接続するデフダクトである。   In addition, although not shown in figure, the duct structure of Example 1 has three ducts other than the air-conditioning duct 2 and the branch duct mentioned above. Two of these ducts are center vent ducts that connect the branch duct and the center register (not shown). Another duct is a differential duct that connects a branch duct and a defroster (not shown).

実施例１のダクト構造体において、インパネ１に作用した力（下方に向けた力）は、インパネ１から空調用ダクト２に伝達する。空調用ダクト２の内部には、剛性に優れる補強体３が配置されている。このため、補強体３はインパネ１に作用した力によっても変形し難く、インパネ１に作用した力を受けることができる。このため実施例１のダクト構造体における空調用ダクト２はインパネ１を補強でき、実施例１のダクト構造体におけるインパネ１は変形し難い。また、補強体３は空調用ダクト２よりも小型であるため、軽量であり、かつ変形し難い。このため、実施例１のダクト構造体によると、空調用ダクトによってインパネを信頼性高く補強でき、かつ、空調用ダクトの質量増大を抑制できる。   In the duct structure according to the first embodiment, the force acting on the instrument panel 1 (force directed downward) is transmitted from the instrument panel 1 to the air conditioning duct 2. A reinforcing body 3 having excellent rigidity is disposed inside the air conditioning duct 2. For this reason, the reinforcing body 3 is not easily deformed by the force acting on the instrument panel 1 and can receive the force acting on the instrument panel 1. Therefore, the air conditioning duct 2 in the duct structure of the first embodiment can reinforce the instrument panel 1, and the instrument panel 1 in the duct structure of the first embodiment is not easily deformed. Further, since the reinforcing body 3 is smaller than the air-conditioning duct 2, it is lightweight and hardly deformed. For this reason, according to the duct structure of Example 1, an instrument panel can be reinforced with the air conditioning duct with high reliability, and an increase in mass of the air conditioning duct can be suppressed.

なお、インパネ１から空調用ダクト２に伝達した力は、空調用ダクト２の第１保持壁部４４→第１受圧壁部３０→補強壁部３２→第２受圧壁部３１→第２保持壁部４５の順に伝達し、さらに空調装置のブラケット８に伝達する。空調装置のブラケット８は剛性に優れる部材であり変形し難いため、インパネ１に作用し空調用ダクト２に伝達した力を受けることができる。実施例１のダクト構造体においては、空調装置のブラケット８が空調用ダクト２の下方に配置され、空調装置のブラケット８によって空調用ダクト２に伝達した力を受けたが、本発明のダクト構造体における空調用ダクト２は、その他の相手部材の上方に配置することもできる。空調用ダクト２の下方に配置される相手部材としては、例えば、Ａ／Ｃユニット等、剛性に優れるものが好ましい。   The force transmitted from the instrument panel 1 to the air conditioning duct 2 is the first holding wall portion 44 → the first pressure receiving wall portion 30 → the reinforcing wall portion 32 → the second pressure receiving wall portion 31 → the second holding wall of the air conditioning duct 2. It transmits in order of the part 45, and also transmits to the bracket 8 of an air conditioner. Since the bracket 8 of the air conditioner is a member having excellent rigidity and is not easily deformed, it can receive the force that acts on the instrument panel 1 and is transmitted to the air conditioning duct 2. In the duct structure according to the first embodiment, the bracket 8 of the air conditioner is disposed below the air conditioning duct 2 and receives the force transmitted to the air conditioning duct 2 by the bracket 8 of the air conditioner. The air-conditioning duct 2 in the body can be arranged above other mating members. As the mating member disposed below the air conditioning duct 2, for example, a member having excellent rigidity such as an A / C unit is preferable.

上述したように第１保持壁部４４は上方に***し第２保持壁部４５は下方に***している。このためダクト本体４の内径は、第１保持壁部４４および第２保持壁部４５が形成されている部分において、僅かに拡径している。したがって、第１ダクト壁部４２における第１保持壁部４４以外の部分の下面と、第１受圧壁部３０の下面とは、ほぼ面一である。また、第２ダクト壁部４３における第２保持壁部４５以外の部分の上面と、第２受圧壁部３１の上面とは、ほぼ面一である。したがって、実施例１のダクト構造体によると、通気抵抗の増大を抑制しつつ空調用ダクト２の内部に補強体３を配置できる。   As described above, the first holding wall portion 44 protrudes upward and the second holding wall portion 45 protrudes downward. For this reason, the inner diameter of the duct body 4 is slightly increased in the portion where the first holding wall portion 44 and the second holding wall portion 45 are formed. Therefore, the lower surface of the first duct wall portion 42 other than the first holding wall portion 44 and the lower surface of the first pressure receiving wall portion 30 are substantially flush with each other. Further, the upper surface of the second duct wall portion 43 other than the second holding wall portion 45 and the upper surface of the second pressure receiving wall portion 31 are substantially flush with each other. Therefore, according to the duct structure of the first embodiment, the reinforcing body 3 can be disposed inside the air conditioning duct 2 while suppressing an increase in ventilation resistance.

実施例１のダクト構造体におけるダクト本体４は、ブロー成形されてなる。このためダクト本体４と補強体３とは別体で成形されている。補強体３は、ダクト本体４の第１端部４０からダクト本体４に差し込まれ、第１保持壁部４４と第２保持壁部４５との間に取り付けられている。したがって、補強体３のダクト本体４への取り付け作業効率を考慮すると、補強体３の位置（すなわち第１保持壁部４４および第２保持壁部４５の位置）は第１端部４０の近傍（すなわち、車両における車幅方向の中央部近傍）であるのが好ましい。また、インパネ１は車幅方向に長い部材である。このため、インパネ１を信頼性高く補強するためにも、補強体３を車幅方向の中央部近傍に配置するのが良い。実施例１のダクト構造体において、補強体３における軸方向の中心線と、車両における車幅方向の中心線と、の距離は１５０ｍｍである。取り付け作業効率を向上させ、インパネ１を信頼性高く補強するためには、この距離は３００ｍｍ以下であるのが好ましい。   The duct body 4 in the duct structure of Example 1 is blow molded. For this reason, the duct body 4 and the reinforcing body 3 are formed separately. The reinforcing body 3 is inserted into the duct main body 4 from the first end 40 of the duct main body 4, and is attached between the first holding wall portion 44 and the second holding wall portion 45. Therefore, in consideration of the efficiency of attaching the reinforcing body 3 to the duct body 4, the position of the reinforcing body 3 (that is, the position of the first holding wall portion 44 and the second holding wall portion 45) is in the vicinity of the first end portion 40 ( That is, it is preferably in the vicinity of the center of the vehicle in the vehicle width direction. The instrument panel 1 is a member that is long in the vehicle width direction. For this reason, in order to reinforce the instrument panel 1 with high reliability, it is preferable to arrange the reinforcing body 3 in the vicinity of the center in the vehicle width direction. In the duct structure according to the first embodiment, the distance between the axial center line of the reinforcing body 3 and the center line of the vehicle in the vehicle width direction is 150 mm. In order to improve the mounting work efficiency and to reinforce the instrument panel 1 with high reliability, this distance is preferably 300 mm or less.

（実施例２）
実施例２のダクト構造体は、補強体の形状以外は実施例１のダクト構造体と同じものである。実施例２のダクト構造体を図３と同位置で切断した様子を模式的に表す断面図を図４に示す。 (Example 2)
The duct structure of Example 2 is the same as the duct structure of Example 1 except for the shape of the reinforcing body. FIG. 4 is a cross-sectional view schematically showing a state in which the duct structure of Example 2 is cut at the same position as FIG.

実施例２のダクト構造体における補強体３は、１つのみの補強壁部３２を持ち断面略コ字状をなすこと以外は、実施例１のダクト構造体における補強体と同じものである。実施例２のダクト構造体における空調用ダクト２は、補強体３の補強壁部３２が１つのみであるために、実施例１のダクト構造体における空調用ダクトに比べて軽量であり、かつ、空調空気の流通抵抗が小さい。このため、実施例２のダクト構造体によると、空調用ダクト２の質量および流通抵抗の増大を抑制しつつ、空調用ダクト２によってインパネ１を補強できる。   The reinforcing body 3 in the duct structure of the second embodiment is the same as the reinforcing body in the duct structure of the first embodiment except that the reinforcing body 3 has only one reinforcing wall portion 32 and has a substantially U-shaped cross section. The air conditioning duct 2 in the duct structure of the second embodiment is lighter than the air conditioning duct in the duct structure of the first embodiment because the reinforcing body 3 has only one reinforcing wall 32, and The flow resistance of conditioned air is small. For this reason, according to the duct structure of Example 2, the instrument panel 1 can be reinforced by the air conditioning duct 2 while suppressing an increase in the mass and flow resistance of the air conditioning duct 2.

（実施例３）
実施例３のダクト構造体は、補強体の形状以外は実施例１のダクト構造体および実施例２のダクト構造体と同じものである。実施例３のダクト構造体を図３と同位置で切断した様子を模式的に表す断面図を図５に示す。 (Example 3)
The duct structure of Example 3 is the same as the duct structure of Example 1 and Example 2 except for the shape of the reinforcing body. FIG. 5 is a cross-sectional view schematically showing a state in which the duct structure of Example 3 is cut at the same position as FIG.

実施例３のダクト構造体における補強体３は、１つのみの補強壁部３２を持ち断面略エ字状をなすこと以外は、実施例１のダクト構造体における補強体と同じものである。実施例３のダクト構造体における空調用ダクト２は、補強体３の補強壁部３２が１つのみであるために、実施例１のダクト構造体における空調用ダクトに比べて軽量であり、かつ、流通抵抗が小さい。   The reinforcing body 3 in the duct structure according to the third embodiment is the same as the reinforcing body in the duct structure according to the first embodiment except that the reinforcing body 3 has only one reinforcing wall portion 32 and has a substantially E-shaped cross section. The air conditioning duct 2 in the duct structure of the third embodiment is lighter than the air conditioning duct in the duct structure of the first embodiment because there is only one reinforcing wall 32 of the reinforcing body 3, and , Distribution resistance is small.

また、補強壁部３２は、第１受圧壁部３０および第２受圧壁部３１の幅方向の略中央部分に一体化されている。このため、実施例３のダクト構造体における第１受圧壁部３０は、実施例２のダクト構造体における第１受圧壁部に比べて変形し難い。換言すると、実施例３のダクト構造体における補強体３は、実施例２のダクト構造体における補強体に比べて変形し難い。よって実施例３のダクト構造体における空調用ダクト２はインパネ１をさらに信頼性高く補強できる。   Further, the reinforcing wall portion 32 is integrated with a substantially central portion in the width direction of the first pressure receiving wall portion 30 and the second pressure receiving wall portion 31. For this reason, the 1st pressure receiving wall part 30 in the duct structure of Example 3 is hard to deform | transform compared with the 1st pressure receiving wall part in the duct structure of Example 2. FIG. In other words, the reinforcing body 3 in the duct structure of the third embodiment is less likely to be deformed than the reinforcing body in the duct structure of the second embodiment. Therefore, the air conditioning duct 2 in the duct structure of the third embodiment can reinforce the instrument panel 1 with higher reliability.

１：インストルメントパネル ２：空調用ダクト（サイドベントダクト）
３：補強体 ４：ダクト本体
１０：リブ
４２：第１ダクト壁部 ４３：第２ダクト壁部
３０：第１受圧壁部 ３１：第２受圧壁部
３２：補強壁部 1: Instrument panel 2: Duct for air conditioning (side vent duct)
3: Reinforcing body 4: Duct body 10: Rib 42: First duct wall portion 43: Second duct wall portion 30: First pressure receiving wall portion 31: Second pressure receiving wall portion 32: Reinforcing wall portion

Claims (6)

車両用インストルメントパネルと該インストルメントパネルの裏面側に配置されている空調用ダクトと、を持つダクト構造体であって、
該空調用ダクトは、
該インストルメントパネルに対面する第１ダクト壁部と、該第１ダクト壁部と離間しつつ該第１ダクト壁部に対面する第２ダクト壁部と、を持ち筒状をなすダクト本体と、
該第１ダクト壁部に対面する第１受圧壁部と、該第２ダクト壁部に対面する第２受圧壁部と、該第１受圧壁部と該第２受圧壁部とに一体化されている少なくとも１つの補強壁部と、を持ち、ダクト本体の内部に配置され、該ダクト本体よりも剛性の高い補強体と、を持ち、
該インストルメントパネルのなかで該第１受圧壁部に対面する部分は、下方に突起するリブを持つことを特徴とするダクト構造体。 A duct structure having a vehicle instrument panel and an air conditioning duct disposed on the back side of the instrument panel,
The air conditioning duct is:
A duct main body having a first duct wall portion facing the instrument panel, and a second duct wall portion facing the first duct wall portion while being separated from the first duct wall portion, and having a cylindrical shape;
The first pressure receiving wall portion facing the first duct wall portion, the second pressure receiving wall portion facing the second duct wall portion, the first pressure receiving wall portion, and the second pressure receiving wall portion are integrated. has at least one reinforcing walls are disposed inside the duct body, Chi lifting and a high reinforcement rigidity than the duct body,
Portion facing the first pressure receiving wall portion among the instrument panel, the duct structure, wherein one lifting rib which protrudes downward. 前記補強体は、前記ダクト本体の材料よりも剛性の高い材料からなる請求項１に記載のダクト構造体。   The duct structure according to claim 1, wherein the reinforcing body is made of a material having rigidity higher than that of the duct body. 前記補強体は、前記ダクト本体よりも厚肉である請求項１または請求項２に記載のダクト構造体。   The duct structure according to claim 1, wherein the reinforcing body is thicker than the duct body. 前記補強壁部は前記第１受圧壁部と直交する方向に延びる請求項１〜請求項３の何れか一つに記載のダクト構造体。   The duct structure according to any one of claims 1 to 3, wherein the reinforcing wall portion extends in a direction orthogonal to the first pressure receiving wall portion. 前記補強体は１つのみの前記補強壁部を持ち、
前記補強壁部は、
前記ダクト本体の軸方向に延び、
該軸方向と直交する方向である幅方向において、前記第１受圧壁部の端部以外の部分に一体化されるとともに、前記第２受圧壁部の端部以外の部分に一体化されている請求項１〜請求項４の何れか一つに記載のダクト構造体。 The reinforcing body has only one reinforcing wall portion,
The reinforcing wall portion is
Extending in the axial direction of the duct body,
In the width direction, which is a direction orthogonal to the axial direction, it is integrated with a portion other than the end of the first pressure receiving wall portion, and is integrated with a portion other than the end of the second pressure receiving wall portion. The duct structure as described in any one of Claims 1-4. 前記インストルメントパネルのなかで前記第１受圧壁部に対面する部分は、下方に突起するリブを持つ請求項１〜請求項５の何れか一つに記載のダクト構造体。   The duct structure according to any one of claims 1 to 5, wherein a portion of the instrument panel that faces the first pressure receiving wall portion has a rib projecting downward.
JP2009219233A 2009-09-24 2009-09-24 Duct structure Expired - Fee Related JP5177104B2 (en)

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