JP5041707B2

JP5041707B2 - Fitting structure of air conditioning duct for vehicles

Info

Publication number: JP5041707B2
Application number: JP2006023796A
Authority: JP
Inventors: 正章末岡
Original assignee: Kyoraku Co Ltd
Current assignee: Kyoraku Co Ltd
Priority date: 2006-01-31
Filing date: 2006-01-31
Publication date: 2012-10-03
Anticipated expiration: 2026-01-31
Also published as: JP2007203848A

Description

本発明は、車両用空調ダクトの嵌合構造に関するもので、特に、分割成形された空調ダクトの接続部分またはエアコンユニットなどの車両用空調装置の吹き出し口と空調ダクトの嵌合構造であって、接続の際に嵌合爪と爪受け部が確実に嵌合され強固に固定されるものである。 The present invention relates to a fitting structure for an air conditioning duct for a vehicle, and in particular, a fitting structure for an air conditioning duct and an outlet of a vehicle air conditioner such as a connection part of an air conditioning duct that is divided or formed, At the time of connection, the fitting claw and the claw receiving portion are securely fitted and firmly fixed.

車両に装備されるエアコンディショナー用の空調ダクトは、車両の天井裏などに配設されるが、この空調ダクトは角筒状で分割可能であって互いの接続のための係止爪と係止孔による嵌合構造を有する。そして、寸法誤差を吸収するためダクトの挿入方向に係止孔を長孔にして遊びを設けた構造などが知られている（特開２００２−３２１５１７号公報参照）。
特開２００２−３２１５１７号公報 An air conditioning duct for an air conditioner installed in a vehicle is arranged on the back of the ceiling of the vehicle, etc., but this air conditioning duct can be divided in a rectangular tube shape and locked with a locking claw for mutual connection. It has a fitting structure with holes. In order to absorb a dimensional error, a structure in which a play is provided by making a locking hole a long hole in the insertion direction of the duct is known (see Japanese Patent Application Laid-Open No. 2002-321517).
JP 2002-321517 A

前掲の特開２００２−３２１５１７号公報に記載されている車両用空調ダクトにあっては、互いに挿入して接続する一方のダクト側面に長手方向に延びる係止孔を、かつ他方のダクトの側面に上記係止孔に係止させる係止爪を設けた構造であって、一方および他方のダクト壁面が平坦面であるため成形後の熱収縮および嵌合時の応力により内方へ変形しやすく、係止孔に対する係止爪の係止がはずれることがあり、また、係止孔がダクトの長手方向に延びているので、係止爪との係止位置関係がダクトの挿入部において定まらない場合が生じてしまう欠点があった。 In the vehicle air conditioning duct described in the above-mentioned JP-A-2002-321517, a locking hole extending in the longitudinal direction is provided on one side of the duct that is inserted and connected to each other, and on the side of the other duct. It is a structure provided with a locking claw to be locked in the locking hole, and since one and the other duct wall surfaces are flat surfaces, they are easily deformed inward due to heat shrinkage after molding and stress at the time of fitting, The locking claw may be disengaged from the locking hole, and the locking hole extends in the longitudinal direction of the duct, so the locking position relationship with the locking claw is not fixed at the duct insertion part. There was a drawback that would occur.

そこで本発明は、このような問題点を解消しようとするものであって、嵌合爪が形成されている壁面の変形をなくして嵌合爪を爪受け部に確実かつ強固に嵌合保持できる車両用空調ダクトの嵌合構造を提供するものである。 Therefore, the present invention is intended to solve such a problem, and the fitting claw can be securely and firmly fitted and held in the claw receiving portion by eliminating the deformation of the wall surface on which the fitting claw is formed. A fitting structure for an air conditioning duct for a vehicle is provided.

上記目的を達成するための本発明の請求項１に係る車両用空調ダクトの嵌合構造は、分割形成された一方のダクトと他方のダクトを一体に連結固定するダクトの嵌合構造であって、一方のダクトは他方のダクトの端部に挿入して接続される略角形の嵌合部分を有し、前記一方のダクトの嵌合部分の壁面には少なくとも１つの壁面を外方へ凸状に突出させたリブ状の嵌合爪が設けられ、かつ、前記一方のダクトの嵌合部分は、前記一方のダクトのその他の部分より断面の幅が小さく、前記他方のダクトの嵌合部分には前記リブ状の嵌合爪に対応した爪受け部が設けられており、前記リブ状の嵌合爪および爪受け部はダクトの前記端部の周縁に沿って細長く形成されているとともに、前記嵌合爪および前記爪受け部が形成された壁面はダクト径方向の壁面断面形状が外方へ湾曲した曲面に形成され、爪受け部が形成された壁の曲面は嵌合爪が形成された壁の曲面よりも小さい曲率に形成され、かつ、爪受け部が形成された壁の内側の曲面は嵌合爪が形成された壁の外側の曲面よりも小さい曲率に形成され、一方のダクトの嵌合部分を他方のダクトの端部に挿入することにより、リブ状の嵌合爪が爪受け部に嵌り込み固定されることを特徴とするものである。 A vehicle air conditioning duct fitting structure according to claim 1 of the present invention for achieving the above object is a duct fitting structure for integrally connecting and fixing one duct formed separately and the other duct. The one duct has a substantially square fitting portion inserted and connected to the end portion of the other duct, and at least one wall surface of the fitting portion of the one duct protrudes outward. And a fitting portion of the one duct has a smaller cross-sectional width than the other portion of the one duct, and the fitting portion of the other duct has claw receiving sections corresponding is provided on the rib-like fitting claws, together with the rib-like fitting claws and claw receiving portions are formed elongated along a peripheral edge of said end portion of the duct the fitting claw and the claw receiving portion is formed wall duct radial direction The wall cross-sectional shape of the wall is formed into a curved surface curved outward, the curved surface of the wall on which the claw receiving portion is formed is formed with a smaller curvature than the curved surface of the wall on which the fitting claw is formed, and the claw receiving portion is The curved surface on the inner side of the formed wall is formed with a smaller curvature than the curved surface on the outer side of the wall on which the fitting claw is formed, and the ribs are formed by inserting the fitting part of one duct into the end of the other duct. A fitting nail having a shape is fitted and fixed to the nail receiving portion.

本発明によれば、嵌合爪が形成されている壁面の変形をなくして嵌合爪を爪受け部に確実かつ強固に嵌合保持できる車両用空調ダクトの嵌合構造を得ることができる。 ADVANTAGE OF THE INVENTION According to this invention, the fitting structure of the vehicle air-conditioning duct which can eliminate the deformation | transformation of the wall surface in which the fitting nail | claw is formed, and can carry out a fitting nail | claw fitting part reliably and firmly can be obtained.

図１は本発明の一実施の形態に係る車両用空調ダクトの一部を示す斜視図、図２は図１におけるＡ−Ａ断面図、図３は図１におけるＢ−Ｂ断面図である。 1 is a perspective view showing a part of a vehicle air-conditioning duct according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG.

図１に示すように、１は車両用空調ダクトである。この車両用空調ダクト１は、分割形成された一方のダクト２および他方のダクト３からなり、一方のダクト２および他方のダクト３にはそれらを接続して一体に固定するダクトの嵌合部分４を備えているものである。一方のダクト２および他方のダクト３は略四角筒状であり、それぞれの一壁面５とその対向壁面６（図では上壁面および下壁面）はそれぞれ外方へ湾曲した曲面７、８となっている。一方のダクト２および他方のダクト３のその他の壁面とその対向壁面（図では両側壁面）は平面状であり、四隅部は丸みをもたせた形状に形成されている。一方のダクト２および他方のダクト３は、ブロー成形によりそれぞれ形成されたものである。 As shown in FIG. 1, reference numeral 1 denotes a vehicle air conditioning duct. The vehicle air-conditioning duct 1 is composed of one duct 2 and the other duct 3 that are divided and formed, and the duct fitting portion 4 that connects and fixes the one duct 2 and the other duct 3 together. It is equipped with. One of the duct 2 and the other duct 3 has a substantially square tube shape, each one wall surface 5 and its opposing wall 6 curved 7,8 curved to the outward in each (upper wall surface and lower wall surface in the drawing) It has become. Other wall and the opposing wall surface of one of the duct 2 and the other duct 3 (both side walls in the drawing) is planar, the four corners are formed in a shape remembering rounded. One duct 2 and the other duct 3 are each formed by blow molding.

一方のダクト２は他方のダクト３の端部に挿入して接続される嵌合部分４を有するが、嵌合部分４において外方へ湾曲した曲面７、８となっている一壁面５およびその対向壁面６には、１つの突出した嵌合爪９、１０がそれぞれ互いに位置をずらして設けられ、かつ他方のダクト３の端部には嵌合爪９、１０に対応した爪受け部１１、１２が設けられている。前記嵌合爪９、１０は一方のダクト２の開口部１３の周縁に沿って細長く形成されており、一方のダクト２の嵌合部分を他方のダクト３の端部に挿入することにより、嵌合爪９、１０が爪受け部１１、１２に嵌り込み固定される。 One duct 2 has a fitting portion 4 that is inserted and connected to the end of the other duct 3, and one wall surface 5 that is curved outwardly curved in the fitting portion 4, and its wall surface 5. opposed to the wall surface 6, one projection fitting claw 9, 10 is provided by shifting the positions in each other respectively, and the other claw receiving portions 11 at the ends of the duct 3 which corresponds to the fitting claw 9,10 , 12 are provided. The fitting claws 9, 10 are elongated along the periphery of the opening 13 of one duct 2, and the fitting portion of one duct 2 is inserted into the end of the other duct 3 to fit. The claws 9 and 10 are fitted and fixed to the claw receiving portions 11 and 12.

他方のダクト３の端部において爪受け部１１、１２が形成された一壁面５および対向壁面６は、前述のように外方へ湾曲した曲面７、８を有しているが、この爪受け部１１、１２が形成された一面壁５および対向壁面６の外方へ湾曲した曲面７、８は、嵌合爪９、１０が形成された一方のダクト２の一壁面５およびその対向壁面６の曲面よりも小さい曲率に形成されている。１３はエア流路である。 The one wall surface 5 and the opposite wall surface 6 in which the claw receiving portions 11 and 12 are formed at the end of the other duct 3 have the curved surfaces 7 and 8 curved outward as described above. The curved surfaces 7 and 8 curved outward of the one-surface wall 5 and the opposing wall surface 6 where the portions 11 and 12 are formed are the one wall surface 5 of the one duct 2 where the fitting claws 9 and 10 are formed and the opposite wall surface 6 thereof. The curvature is smaller than the curved surface. Reference numeral 13 denotes an air flow path.

以上のように構成された車両用空調ダクト１は、嵌合爪９、１０が形成された一壁面５およびその対向壁面６が外方に湾曲した曲面７、８を有しているので、これによって嵌合爪９、１０が形成された一壁面５または対向壁面６が内側に凹む（壁面の内倒れ現象）を防止し、嵌合爪９、１０が確実に爪受け部１１、１２に対して嵌合されることとなる。さらに、嵌合爪９、１０は一方のダクト２の開口部の周縁に沿って細長く形成されていることにより、これが一壁面５およびその対向壁面６の内倒れを防止するためのリブの役割を果たし、かつ嵌合爪９、１０が形成された一壁面５およびその対向壁面６が曲面形状となっていることと相まって爪受け部１１、１２に対して嵌合爪９、１０が弾性的に嵌り込み、爪受け部１１、１２に対して嵌合爪９、１０が強固に固定される。 The vehicle air-conditioning duct 1 configured as described above has curved surfaces 7 and 8 in which one wall surface 5 on which the fitting claws 9 and 10 are formed and the opposite wall surface 6 are curved outward. This prevents the one wall surface 5 or the opposite wall surface 6 on which the fitting claws 9 and 10 are formed from being dented inward (the wall falling down phenomenon), so that the fitting claws 9 and 10 are surely connected to the claw receiving portions 11 and 12. Will be fitted. Further, since the fitting claws 9 and 10 are formed elongated along the periphery of the opening of one duct 2, this serves as a rib for preventing the inner wall 5 and the opposite wall 6 from falling down. In addition, the fitting claws 9, 10 are elastically formed with respect to the claw receiving portions 11, 12, coupled with the fact that the one wall surface 5 on which the fitting claws 9, 10 are formed and the opposite wall surface 6 are curved. The fitting claws 9 and 10 are firmly fixed to the fitting and claw receiving portions 11 and 12.

また、嵌合爪９、１０が形成された一壁面５およびその対向壁面６と、爪受け部１１、１２が形成された一壁面５およびその対向壁面６の曲面の曲率を異なるようにすることで、さらに弾性的に嵌り込む作用を増すことができる。 Also, the curvatures of the curved surfaces of the one wall surface 5 on which the fitting claws 9, 10 are formed and the opposite wall surface 6 are different from the curved surface of the one wall surface 5 on which the claw receiving portions 11, 12 are formed and the opposite wall surface 6. Thus, it is possible to further increase the effect of fitting elastically.

なお、爪受け部１１、１２は嵌合爪９、１０よりやや大きく形成され、嵌合爪９、１０が確実に爪受け部１１、１２に嵌合するように設けることが好ましい。爪受け部１１、１２は嵌合爪９、１０に対応する凹溝とすることもできるが、嵌合爪９、１０を有するダクトはブロー成形等により形成されるため、成形収縮などにより寸法のバラツキが生じることから嵌合爪９、１０の形状に沿った長孔とすることが好ましい。 The claw receiving portions 11 and 12 are preferably formed so as to be slightly larger than the fitting claws 9 and 10 so that the fitting claws 9 and 10 can be securely fitted to the claw receiving portions 11 and 12. The claw receiving portions 11 and 12 can be concave grooves corresponding to the fitting claws 9 and 10, but the duct having the fitting claws 9 and 10 is formed by blow molding or the like, so that the dimensions thereof are reduced by molding shrinkage or the like. Since variation occurs, it is preferable to use a long hole along the shape of the fitting claws 9 and 10.

本発明に係る車両用空調ダクト１は、高密度ポリエチレン、ポリプロピレン又はそれらの樹脂に低密度ポリエチレン、エチレン−プロピレンランダム重合体を配合したポリオレフィン樹脂などブロー成形可能な樹脂で構成される。 The vehicle air-conditioning duct 1 according to the present invention is made of a resin that can be blow-molded, such as high-density polyethylene, polypropylene, or polyolefin resin in which low-density polyethylene or ethylene-propylene random polymer is blended with those resins.

本発明の一実施の形態に係る車両用空調ダクトの一部を示す斜視図である。It is a perspective view which shows a part of vehicle air-conditioning duct which concerns on one embodiment of this invention. 図１におけるＡ−Ａ断面図である。It is AA sectional drawing in FIG. 図１におけるＢ−Ｂ断面図である。It is BB sectional drawing in FIG.

１車両用空調ダクト
２一方のダクト
３他方のダクト
４ダクトの嵌合部分
５一壁面
６対向壁面
７、８外方へ湾曲した曲面
９、１０嵌合爪
１１、１２爪受け部
１３エア流路 DESCRIPTION OF SYMBOLS 1 Vehicle air-conditioning duct 2 One duct 3 The other duct 4 Duct fitting part 5 One wall surface 6 Opposite wall surface 7, 8 Curved surface 9, 10 Fitting claw 11, 12 Claw receiving part 13 Air flow path

Claims

A fitting structure for a duct that integrally connects and fixes one of the divided ducts and the other duct,
One duct has a substantially square fitting part inserted and connected to the end of the other duct,
The wall surface of the fitting portion of the one duct is provided with a rib-like fitting claw that protrudes outwardly from at least one wall surface, and the fitting portion of the one duct is the one side The width of the cross section is smaller than other parts of the duct of
The fitting portion of the other duct is provided with a claw receiving portion corresponding to the rib-like fitting claw,
Together with the rib-like fitting claws and claw receiving portions are formed elongated along a peripheral edge of said end portion of the duct, the wall of the fitting claws and the claw receiving portion is formed duct bore The wall surface in the direction is formed into a curved surface curved outward, and the curved surface of the wall on which the claw receiving portion is formed is formed with a smaller curvature than the curved surface of the wall on which the fitting claw is formed, and the claw receiving portion The curved surface on the inner side of the wall formed with is formed with a smaller curvature than the curved surface on the outer side of the wall on which the fitting claw is formed,
A fitting structure for an air conditioning duct for a vehicle, wherein a rib-like fitting claw is fitted into and fixed to a claw receiving portion by inserting a fitting portion of one duct into an end portion of the other duct.