JP3876669B2

JP3876669B2 - Weather strip for automobile

Info

Publication number: JP3876669B2
Application number: JP2001279033A
Authority: JP
Inventors: 政博野崎
Original assignee: Toyoda Gosei Co Ltd
Current assignee: Toyoda Gosei Co Ltd
Priority date: 2001-09-14
Filing date: 2001-09-14
Publication date: 2007-02-07
Anticipated expiration: 2021-09-14
Also published as: JP2003081024A

Description

【０００１】
【発明の属する技術分野】
本発明は自動車用ウエザストリップ、特に車体側面のドア開口の開口縁に沿って取付けられるウエザストリップに関するものである。
【０００２】
【従来の技術】
図３に示すように、車体側面のドア開口縁１にはこれに沿ってウエザストリップが一連に取付けられ、ドア開口縁１とドア３の外周部との間をシールしている。
【０００３】
図４に示すように、ウエザストリップ５は、取付基部５１と、取付基部５１の一方の側面から膨出する中空シール部５２を備え、取付基部５１がドア開口縁１に形成したフランジ２に取付けられている。
【０００４】
中空シール部５２は、取付基部５１の一方の側面から相互間の間隔が末広がり状に張り出す側面部５２１ａ，５２１ｂの先端がシール壁５２２でつながれた構造とされている。ウエザストリップ５は、ゴムや熱可塑性エラストマーなどのゴム状弾性材の押出成形体で、取付基部５１はソリッド材からなり、シール壁５２２はスポンジ材からなる。両側面部５２１ａ，５２１ｂは、図例のようにほぼ全幅がソリッド材からなるものや、取付基部５１に接続する根元部のみがソリッド材で、他はシール壁５２２と同じスポンジ材からなるものもある。
【０００５】
フランジ２は、ドア開口縁１から開口縁１まわりの車体側面に沿う方向に突出しており、ドア開口縁１上部のルーフサイド部１Ａでは、図４に示すように下方斜め車外方向へ突出し、前後の縦縁部１Ｂ，１Ｃではそれぞれ、後方および前方に向けて突出し、下縁のロッカ部１Ｄでは垂直上方へ突出している。そしてこのフランジ２に、断面ほぼＵ字形のウエザストリップ５の取付基部５１が覆嵌せしめてある。
【０００６】
【発明が解決しようとする課題】
フランジ２の突出方向がドア開口縁１の部位により異るため、フランジ２に取付けられたウエザストリップ５のシール壁５２２に対するドア３の外周部の押付け方向は開口縁１の部位により相違する。
【０００７】
図５（Ａ），（Ｂ），（Ｃ），（Ｄ）はそれぞれドア開口縁１のルーフサイド部１Ａ，前部縦縁１Ｂ，後部縦縁１Ｃ，およびロッカ部１Ｄにおけるフランジ２に対するドア３の押付け方向を示すもので、ルーフサイド部１Ａでは矢印Ｐ_Aで示すように斜め方向から、ドア３がヒンジ結合されている前部縦縁１Ｂでは矢印Ｐ_Bで示すように更に斜め方向から（角度α₂＜α₁）、後部縦縁１Ｃおよびロッカ部１Ｄでは矢印Ｐ_C，Ｐ_Dで示すようにほぼ垂直方向から押付けられ、角度α₂と角度α₃の差は一般に５０°程度である。
【０００８】
従って、ドア開口縁１に同一断面形状で押出成形された一連のウエザストリップを装着した場合、そのシール壁に対するドアの押付け方向には各部間に大きな差異があり、シール性能も大きく相違する。
【０００９】
そこで本発明は、車体のドア開口縁に一連に取付けられるウエザストリップにおいて、ドア開口縁のルーフサイド部および前後の縦縁に取付けられる部分のシール壁をドアの押付け方向と直交する方向に形成して均一にかつ良好なシール性能を発揮せしめること、およびウエザストリップのドア開口下縁のロッカ部に取付けられる部分でシール壁が乗降者の靴で引っ掛りが生じないようにすることを目的とする。
【００１０】
【課題を解決するための手段】
本発明は、車体側面のドア開口縁に沿って一連に取付けられる押出成形体のウエザストリップであって、上記開口縁のフランジに取付けられる断面ほぼＵ字形の取付基部と、取付基部の一方の側面から膨出する中空シール部を備えたウエザストリップにおいて、
上記中空シール部は、上記取付基部の一方の側面から相互間の間隔が末広がり状に車外方向へ張り出すドア開口外周側および内周側の両側面部と、両側面部の先端間を湾曲状につなぎ、ドア閉時にドアの外周部内面が押付けられるシール壁とからなり、
上記ドア開口縁のうちのルーフサイド部に沿って設けられて下方斜め車外方向に突出するフランジに取付けられる上記ウエザストリップの第１の部分は、そのドア開口外周側の取付基部からの張り出し幅をドア開口内周側の張り出し部よりも大きく形成し、ドア開口縁のうちのドアがヒンジ結合される前部縦縁に沿って設けられて後方に向けて突出するフランジに取付けられる第２の部分は、そのドア開口外周側の側面部の上記張り出し幅を上記第１の部分とほぼ同じで、そのドア開口内周側の側面部の上記張り出し幅を上記第１の部分よりも短く形成し、ウエザストリップの上記ドア開口縁のうちの後部縦縁に沿って設けられて前方へ向けて突出するフランジに取付けられる第３の部分は、そのドア開口内周側の側面部の上記張り出し幅を上記第１の部分とほぼ同じで、ドア開口外周側の側面部の上記張り出し幅を上記第１の部分よりも短く形成し、
上記第１の部分と第２の部分の境界部、および第１の部分と第３の部分の境界部を、一方の部分の断面形状から他方の部分の断面形状へと徐変する断面形状に形成し、
ウエザストリップ取付け状態で上記第１，第２および第３の部分のシール壁をドアの押付け方向に対してほぼ直交する面に設定する（請求項１）。
ウエザストリップの中空シール部の両側の側面部の取付基部からの張り出し幅を、ドア開口縁の各部位に対応して変化させることで、シール壁の傾斜度をドアの押付け方向の直交するように調整でき、ドア開口縁の各部位においてウエザストリップは均一かつ良好なシール性能を発揮する。ウエザストリップは押出成形体であり、部分的に中空シール部の断面形状が異るウエザストリップの押出成形は、押出機の先端の押出口の前側に中空シール部の外形を成形する複数の口金と、中空シール部の内形を成形する複数の口金をスライド可能に重ね合せて設置し、これら口金を相互にスライドさせて押出されるウエザストリップの中空部の形状を変化させる可変押出成形が適用され、押出しの過程で上記境界部を成形する。
【００１１】
上記ドア開口縁のうち下縁のロッカ部に取付けられるウエザストリップの第４の部分は、その中空シール部を上記第２の部分とほぼ同じ断面形状に形成する（請求項２）。シール部の内周側、すなわち上側の側面部の張り出し幅を短くすることで、中空シール部が乗降者の靴で引っ掛けられたり踏まれたりするのを防止する。
【００１３】
【発明の実施の形態】
図１（Ａ），（Ｂ），（Ｃ）はそれぞれ、ドア開口縁に沿って取付けられたウエザストリップ５の、ルーフサイド部に沿う部分（第１の部分５Ａ），前部縦縁に沿う部分（第２の部分５Ｂ）および後部縦縁に沿う部分（第３の部分５Ｃ）の取付状態の断面を示すものである。ウエザストリップ５が取付けられるフランジ２は、ウエザストリップ５の第１の部分５Ａでは下方斜め車外方向に、第２の部分５Ｂでは後方に向け、第３の部分５Ｃでは前方に向け、それぞれ突出している。
【００１４】
ウエザストリップ５はＥＰＤＭゴムの押出成形体で、互に平行な側壁５１ａ，５１ｂを有する断面Ｕ字形で内部対向面から保持リップ５１１が突出する取付基部５１と、取付基部５１の一方の側面から膨出する中空シール部５２を備えている。中空シール部５２は、取付基部５１の一方の側壁５１ａの外面から相互間の間隔が末広がり状に張り出す側面部５２１ａ，５２１ｂの先端間がシール壁５２２で円弧状につながれた形状とされている。取付基部５１および側面部５２１ａ，５２１ｂはソリッド材からなり、シール壁５２２はスポンジ材からなる。ウエザストリップ取付状態でドア開口の外周側、すなわち中空シール部５２の外周側となる側面部５２１ａは取付基部５１の側壁５１ａから垂直よりもやや外方に向けて直線状に張り出しており、内周側の側面部５２１ｂは先端がドア開口の内周側へ向けてＬ字状に屈曲して張り出す形状としてある。ソリッド材からなる取付基部５１および中空シール部５２のソリッド材からなる側面部５２１ａ，５２１ｂの形状はウエザストリップ５全長にわたり共通である。
【００１５】
図１（Ａ）に示すように、ドア開口縁１のルーフサイド部１Ａに沿うウエザストリップ５の第１の部分５Ａでは、取付基部５１の側面を円弧状に囲むシール壁５２２の一端は側面部５２１ａを延長する側面延長部５２２ａを介して側面部５２１ａに接続し、他端は側面部５２１ｂの屈曲先端部を延長する側面延長部５２２ｂを介して側面部５２１ｂに接続している。そして側面延長部５２２ａを含む側面部５２１ａの張り出し幅、および側面延長部５２２ｂを含む側面部５２１ｂの張り出し幅は、第１の部分５Ａをフランジ２に取付けた状態で、シール壁５２２の一般部が全体としてほぼ垂直方向に延びるように調整してある。この結果、矢印Ｐ_Aで示すようにドア閉時にドア３の外周部はシール壁５２２の一般部の壁面に対してこれとほぼ直交する方向（面直方向）に押付けられる。図において、７は車室の内装ガーニッシュである。
【００１６】
ドア３がヒンジ結合されたドア開口縁１の前部縦縁１Ｂに沿うウエザストリップ５の第２の部分５Ｂでは、図１（Ｂ）に示すように、シール壁５２２は一端が第１の部分５Ａと共通の側面延長部５２２ａを介して側面部５２１ａの先端に接続し、他端は直接に側面部５２１ｂに接続している。これによりフランジ２への取付状態でシール壁５２２の一般部は車体の外方斜め後方に面する傾斜面をなし、矢印Ｐ_Bで示すようにドア閉時にドア３の外周部はシール壁５２２の一般部に対しほぼ面直方向に押付けられる。
【００１７】
図１（Ｃ）に示すように、ドア開口縁１の後部縦縁１Ｃに沿うウエザストリップ５の第３の部分５Ｃでは、第２の部分Ｂとは逆に、中空シール部５２のシール壁５２２の一端は側面部５２１ａの先端に直接に接続し、他端は第１の部分５Ａと共通で側面延長部５２２ｂを介して側面部５２１ｂに接続している。これにより、フランジ２への取付状態でシール壁５２２の一般部は全体としてフランジ２および取付基部５１の側壁にほぼ沿う方向に延びる面となり、矢印Ｐ_Cで示すようにドア閉時にドア３の外周部がほぼ面直に押付けられる。
【００１８】
かくして、ドア開口縁１のルーフサイド１Ａ，前後の縦縁部１Ｂ，１Ｃでは、フランジ２の突出方向の違いにかかわらず、ドア閉時にシール壁５２２の一般部はドア３の外周部によりほぼ面直に押付けられるから、良好なシール性能が効果的に、かつ全長にわたり発揮される。
【００１９】
図２はドア開口縁１のロッカ部１Ｄに沿うウエザストリップ５の第４の部分５Ｄの取付状態の断面を示すものである。フランジ２は垂直上方へ突出し、第４の部分５Ｄの中空シール部５２は、第２の部分５Ｂと共通の形状としてある。これにより取付状態で側面部５２１ｂとシール壁５２２とが接続する中空シール部５２の上端位置を低くし、自動車乗員の乗降時に、靴で中空シール部５２が引っ掛けられたり擦られたりするのが防止される。図において６はロッカ部１Ｄを覆うスカッフプレートである。
【００２０】
中空シール部５２のシール壁５２２はドア閉時にドア３の外周部で矢印Ｐ _A で示すように若干斜め方向から押付けられ、シール効率は他の部位に比べて若干劣るが、ロッカ部１Ｄは他の部位ほどは厳格なシール性能は要求されないので実用上支障は生じない。なお、第４の部分５Ｄを第３の部分５Ｃと共通の断面形状にすれば、シール壁５２２に対しドア３が面直に押付けられてシール効率はよいが、上記引っ掛りが生じやすい。
【００２１】
上記ウエザストリップ５は上記可変押出成形により製造され得る。この場合、一連の押出工程で、上記第１の部分５Ａから第２の部分５Ｂに移行する境界部、第２，第４の部分５Ｂ，５Ｄを経て第３の部分に移行する境界部および第３の部分５Ｃから第１の部分５Ａに移行する境界部のシール壁を一方の部分から他方の部分へと断面形状を徐変させる形状に成形する。
【００２２】
このように押出成形された一連のウエザストリップを、例えば第２の部分５Ｂまたは第３の部分５Ｃの中間部で切断し、所定長さに裁断されたウエザストリップを切断部で接続してループ状とし、ドア開口縁に沿うフランジに取付けることでウエザストリップはドア開口縁に装着される。
【００２３】
なお、上記の実施形態では、中空シール部５２のソリッド材の側面部５２１ｂをＬ字形に形成したが直線状に形成してもよい。また上記ウエザストリップ５の構造は、車体のフロント側のドア開口に限らず、リヤ側のドア開口にも適用され得る。
【００２４】
【発明の効果】
本発明によれば、車体のドア開口縁のフランジに一連に取付けられるウエザストリップにおいて、ドア開口縁の部位によりフランジの突出方向が相違するにかかわらず、ウエザストリップの中空シール部のシール壁面に対するドアの押付け方向を面直にすることができ、均一かつ良好なシール性能が効果的に発揮される。本発明のウエザストリップは、部分的に断面形状を変化させる可変押出成形により生産性よく製造することができる。
【図面の簡単な説明】
【図１】（Ａ），（Ｂ）および（Ｃ）はそれぞれ、本発明に係るウエザストリップの、図３のＡ−Ａ線、Ｂ−Ｂ線およびＣ−Ｃ線に沿う断面図である。
【図２】本発明に係るウエザストリップの、図３のＤ−Ｄ線に沿う断面図である。
【図３】本発明に係るウエザストリップが適用される車体のドア開口部の正面図である。
【図４】従来のウエザストリップの図３のＡ−Ａ線に沿う断面図である。
【図５】（Ａ），（Ｂ），（Ｃ）および（Ｄ）はそれぞれ、図３のＡ−Ａ線，Ｂ−Ｂ線，Ｃ−Ｃ線およびＤ−Ｄ線に沿う位置でのフランジとドア閉時におけるドア外周部のウエザストリップに対する押付け方向との関係を示す図である。
【符号の説明】
１ドア開口縁
１Ａルーフサイド部
１Ｂ前部縦縁
１Ｃ後部縦縁
１Ｄロッカ部
２フランジ
３ドア
５ウエザストリップ
５Ａ第１の部分
５Ｂ第２の部分
５Ｃ第３の部分
５Ｄ第４の部分
５１取付基部
５２中空シール部
５２１ａ外周側の側面部
５２１ｂ内周側の側面部
５２２シール壁
５２２ａ，５２２ｂ側面延長部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a weather strip for automobiles, and more particularly to a weather strip attached along the opening edge of a door opening on the side of a vehicle body.
[0002]
[Prior art]
As shown in FIG. 3, weather strips are attached in series along the door opening edge 1 on the side of the vehicle body to seal between the door opening edge 1 and the outer periphery of the door 3.
[0003]
As shown in FIG. 4, the weather strip 5 includes an attachment base 51 and a hollow seal portion 52 that bulges from one side surface of the attachment base 51, and the attachment base 51 is formed on the flange 2 formed on the door opening edge 1. Installed.
[0004]
The hollow seal portion 52 has a structure in which the tips of the side surface portions 521a and 521b projecting from one side surface of the mounting base portion 51 so as to widen from each other are connected by a seal wall 522. The weather strip 5 is an extruded product of rubber-like elastic material such as rubber or thermoplastic elastomer, the mounting base 51 is made of a solid material, and the seal wall 522 is made of a sponge material. Both side portions 521a and 521b may be made of a solid material having almost the entire width as shown in the figure, or may be made of the same sponge material as the seal wall 522 except that only the base portion connected to the mounting base 51 is a solid material. .
[0005]
Flange 2 is projected in a direction along the door opening edge 1 to the vehicle side around the opening edge 1, the door opening edge first upper roof side portion 1A, projecting downwardly obliquely outside direction as shown in FIG. 4, the front and rear The vertical edge portions 1B and 1C protrude rearward and forward, respectively, and the lower edge rocker portion 1D protrudes vertically upward. An attachment base 51 of a weather strip 5 having a substantially U-shaped cross section is fitted over the flange 2.
[0006]
[Problems to be solved by the invention]
Since the protruding direction of the flange 2 differs depending on the portion of the door opening edge 1, the pressing direction of the outer peripheral portion of the door 3 against the seal wall 522 of the weather strip 5 attached to the flange 2 differs depending on the portion of the opening edge 1.
[0007]
5 (A), (B), (C), and (D) show the door 3 to the flange 2 in the roof side portion 1A, the front vertical edge 1B, the rear vertical edge 1C, and the rocker portion 1D of the door opening edge 1, respectively. pressing indicates the direction, from an oblique direction as indicated by the roof side portion 1A in the arrow P _a, the door 3 is further from an oblique direction as indicated by arrow P _B in the front longitudinal edge 1B is hinged ( angle α ₂ <α _1), the rear longitudinal edges 1C and rocker portion 1D in the arrow P _C, pressed from a substantially vertical direction as indicated by P _D, the difference in the angle alpha ₂ and the angle alpha ₃ is generally in about 50 ° .
[0008]
Therefore, when a series of weather strips extruded with the same cross-sectional shape is attached to the door opening edge 1, there is a great difference between the parts in the pressing direction of the door against the seal wall, and the sealing performance is also greatly different.
[0009]
Accordingly, the present invention provides a weather strip that is attached in series to the door opening edge of the vehicle body, and the seal wall of the roof side portion of the door opening edge and the portion attached to the front and rear vertical edges is formed in a direction perpendicular to the pressing direction of the door. To achieve uniform and good sealing performance, and to prevent the sealing wall from getting caught in the shoes of passengers at the portion of the weatherstrip door opening that is attached to the rocker part And
[0010]
[Means for Solving the Problems]
The present invention relates to a weather strip of the extrusion molded article to be attached to a series along the door opening edge of the vehicle body side, the cross-section generally U-shaped to be attached to the flange of the opening edge and the mounting base, the mounting base one In the weather strip with a hollow seal portion bulging from the side,
The hollow seal portion connects the side surfaces of the outer and inner peripheral sides of the door opening projecting outwardly from the one side surface of the mounting base in a curved shape and the ends of the side surface portions are curvedly connected. , Consisting of a seal wall against which the inner surface of the outer periphery of the door is pressed when the door is closed,
The first portion of the weather strip that is provided along the roof side portion of the door opening edge and that is attached to a flange that protrudes in the obliquely downward direction of the vehicle has an overhanging width from the mounting base on the door opening outer peripheral side. Is formed larger than the overhanging portion on the inner peripheral side of the door opening, and a second of the door opening edges is provided along a front vertical edge to which the door is hinged and attached to a flange protruding rearward . portion, the overhang width of the side portion of the door opening outer periphery substantially the same as the first portion, formed shorter than the projecting width of the first portion of the side surface portion of the door opening peripheral side , weather provided along the rear longitudinal edges a third portion attached to a flange that protrudes toward the front of the door opening edge of the strip, the projecting width of the side portion of the door opening peripheral side The Serial substantially the same as the first portion, shorter than the above overhang width of the first portion of the side surface portion of the door opening the outer peripheral side,
The cross-sectional shape gradually changes from the cross-sectional shape of one part to the cross-sectional shape of the other part of the boundary part of the first part and the second part and the boundary part of the first part and the third part. Forming,
With the weather strip attached, the sealing walls of the first, second and third portions are set to a plane substantially orthogonal to the pressing direction of the door (claim 1).
By changing the overhang width from the mounting base of the side part on both sides of the weather seal hollow seal part corresponding to each part of the door opening edge, the inclination of the seal wall is made orthogonal to the pressing direction of the door The weather strip exhibits uniform and good sealing performance at each part of the door opening edge. The weather strip is an extrusion molded body, and the extrusion of the weather strip having a partially different cross-sectional shape of the hollow seal portion includes a plurality of shapes for forming the outer shape of the hollow seal portion on the front side of the extrusion port at the tip of the extruder. Variable extrusion molding that changes the shape of the hollow portion of the weather strip that is extruded by installing the base and a plurality of bases that form the inner shape of the hollow seal portion in a slidable manner. Is applied to form the boundary in the process of extrusion.
[0011]
The fourth portion of the weather strip attached to the rocker portion at the lower edge of the door opening edge forms the hollow seal portion in substantially the same cross-sectional shape as the second portion (Claim 2). By shortening the overhang width of the inner peripheral side of the seal portion, that is, the upper side surface portion, the hollow seal portion is prevented from being caught or stepped on by the passenger's shoes.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
1A, 1B, and 1C respectively show a portion (first portion 5A) along the roof side portion and a front vertical edge of the weather strip 5 attached along the door opening edge. The cross section of the attachment state of the part (3rd part 5C) in alignment with the part (2nd part 5B) in alignment and the part (3rd part 5C) in alignment with a rear vertical edge is shown. The flange 2 to which the weather strip 5 is attached protrudes downward in the first oblique direction 5A of the weather strip 5, toward the rear side of the second portion 5B, and toward the front side of the third portion 5C. ing.
[0014]
The weather strip 5 is an extruded product of EPDM rubber and has a U-shaped cross section having side walls 51a and 51b parallel to each other, a mounting base 51 from which the holding lip 511 protrudes from the inner facing surface, and one side surface of the mounting base 51. A bulging hollow seal portion 52 is provided. The hollow seal portion 52 has a shape in which the ends of the side surface portions 521a and 521b projecting from the outer surface of the one side wall 51a of the mounting base portion 51 so as to expand toward each other are connected in a circular arc shape with a seal wall 522. . The mounting base 51 and the side portions 521a and 521b are made of a solid material, and the seal wall 522 is made of a sponge material. The side surface portion 521a which is the outer peripheral side of the door opening in the weather strip mounting state, that is, the outer peripheral side of the hollow seal portion 52, protrudes linearly from the side wall 51a of the mounting base portion 51 outward slightly from the vertical, The side part 521b on the peripheral side has a shape in which the tip is bent and protrudes in an L shape toward the inner peripheral side of the door opening. The shapes of the mounting base portion 51 made of solid material and the side surface portions 521a and 521b made of solid material of the hollow seal portion 52 are common over the entire length of the weather strip 5.
[0015]
As shown in FIG. 1A, in the first portion 5A of the weather strip 5 along the roof side portion 1A of the door opening edge 1, one end of the seal wall 522 that surrounds the side surface of the mounting base 51 in an arc shape is the side surface. The other end is connected to the side surface portion 521b via a side surface extension portion 522b that extends the bent tip of the side surface portion 521b through a side surface extension portion 522a that extends the portion 521a. The protruding width of the side surface portion 521a including the side surface extension portion 522a and the protruding width of the side surface portion 521b including the side surface extension portion 522b are such that the general portion of the seal wall 522 is in a state where the first portion 5A is attached to the flange 2. As a whole, it is adjusted so as to extend in a substantially vertical direction. As a result, the outer peripheral portion of the door 3 when the door is closed as indicated by the arrow P _A is pressed in a direction substantially perpendicular thereto with respect to the wall surface of the common portion of the sealing wall 522 (the orthogonal direction). In the figure, 7 is an interior garnish of the passenger compartment.
[0016]
In the second portion 5B of the weather strip 5 along the front vertical edge 1B of the door opening edge 1 to which the door 3 is hinged, as shown in FIG. 1 (B), one end of the seal wall 522 has a first end. The end of the side surface portion 521a is connected to the front end of the side surface portion 521a via the side surface extension 522a common to the portion 5A, and the other end is directly connected to the side surface portion 521b. As a result, the general portion of the seal wall 522 forms an inclined surface facing obliquely rearwardly outward of the vehicle body when attached to the flange 2, and the outer peripheral portion of the door 3 of the seal wall 522 is closed when the door is closed as indicated by an arrow P _B. It is pressed almost perpendicular to the general part.
[0017]
As shown in FIG. 1C, in the third portion 5C of the weather strip 5 along the rear vertical edge 1C of the door opening edge 1, the seal wall of the hollow seal portion 52 is opposite to the second portion B. One end of 522 is directly connected to the tip of the side surface portion 521a, and the other end is connected to the side surface portion 521b through the side surface extension 522b in common with the first portion 5A. Thus, the general portion of the seal wall 522 in the mounted state of the flange 2 is made as a whole extends substantially along a direction on the side wall of the flange 2 and the mounting base 51 face, the outer periphery of the door 3 when the door is closed as indicated by arrow P _C The part is pressed almost straight.
[0018]
Thus, on the roof side 1A of the door opening edge 1 and the front and rear vertical edge portions 1B and 1C, the general portion of the seal wall 522 is substantially faced by the outer peripheral portion of the door 3 when the door is closed, regardless of the difference in the protruding direction of the flange 2. Since it is pressed directly, good sealing performance is exhibited effectively and over the entire length.
[0019]
FIG. 2 shows a cross-section of the mounting state of the fourth portion 5D of the weather strip 5 along the rocker portion 1D of the door opening edge 1. The flange 2 protrudes vertically upward, and the hollow seal portion 52 of the fourth portion 5D has a common shape with the second portion 5B. This lowers the upper end position of the hollow seal portion 52 where the side surface portion 521b and the seal wall 522 are connected in the mounted state, and prevents the hollow seal portion 52 from being caught or rubbed by shoes when an automobile occupant gets on and off. Is done. In the figure, 6 is a scuff plate that covers the rocker portion 1D.
[0020]
Sealing wall 522 of the hollow seal portion 52 is an arrow at the outer peripheral portion of the door 3 when the door is closed P _A As shown in the figure, the seal is pressed slightly from the oblique direction, and the seal efficiency is slightly inferior to that of the other parts. However, the rocker portion 1D does not require as strict sealing performance as the other parts, so there is no practical problem. Note that if the fourth portion 5D has a common cross-sectional shape with the third portion 5C, the door 3 is pressed straight against the seal wall 522 and the sealing efficiency is good, but the above-mentioned catch is likely to occur.
[0021]
The weather strip 5 can be manufactured by the variable extrusion molding. In this case, in a series of extrusion steps, the boundary portion that transitions from the first portion 5A to the second portion 5B, the boundary portion that transitions to the third portion via the second and fourth portions 5B and 5D, and the first portion The sealing wall at the boundary portion that transitions from the third portion 5C to the first portion 5A is formed into a shape that gradually changes the cross-sectional shape from one portion to the other portion.
[0022]
A series of weather strips extruded in this manner is cut, for example, at the intermediate portion of the second portion 5B or the third portion 5C, and the weather strip cut to a predetermined length is connected at the cutting portion. The weather strip is attached to the door opening edge by being looped and attached to a flange along the door opening edge.
[0023]
In the above embodiment, the side surface portion 521b of the solid material of the hollow seal portion 52 is formed in an L shape, but may be formed in a straight shape. The structure of the weather strip 5 can be applied not only to the front door opening of the vehicle body but also to the rear door opening.
[0024]
【The invention's effect】
According to the present invention, in a weather strip that is attached in series to the flange of the door opening edge of the vehicle body, the seal wall surface of the hollow seal portion of the weather strip regardless of whether the protruding direction of the flange differs depending on the door opening edge portion. The pressing direction of the door with respect to can be made straight, and uniform and good sealing performance is effectively exhibited. The weather strip of the present invention can be manufactured with high productivity by variable extrusion molding in which the cross-sectional shape is partially changed.
[Brief description of the drawings]
FIGS. 1A, 1B, and 1C are cross-sectional views taken along lines AA, BB, and CC of FIG. 3, respectively, of a weather strip according to the present invention. .
2 is a cross-sectional view of the weather strip according to the present invention taken along line DD in FIG.
FIG. 3 is a front view of a door opening of a vehicle body to which a weather strip according to the present invention is applied.
4 is a cross-sectional view of the conventional weather strip taken along line AA in FIG.
5 (A), (B), (C) and (D) are flanges at positions along the lines AA, BB, CC and DD in FIG. 3, respectively. It is a figure which shows the relationship between the pressing direction with respect to the weather strip of the door outer peripheral part at the time of a door closing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door opening edge 1A Roof side part 1B Front vertical edge 1C Rear vertical edge 1D Rocker part 2 Flange 3 Door 5 Weather strip 5A 1st part 5B 2nd part 5C 3rd part 5D 4th part 51 Attachment Base 52 Hollow seal portion 521a Side surface portion 521b on the outer peripheral side Side surface portion 522 on the inner peripheral side Seal wall 522a, 522b Side surface extension portion

Claims

A weather strip of an extrusion molded body that is attached in series along a door opening edge on a side surface of a vehicle body, and has a substantially U-shaped mounting base attached to a flange of the opening edge, and bulges from one side of the mounting base In a weather strip having a hollow seal portion
The hollow seal portion connects the side surfaces of the outer and inner peripheral sides of the door opening projecting outwardly from the one side surface of the mounting base in a curved shape and the ends of the side surface portions are curvedly connected. , Consisting of a seal wall against which the inner surface of the outer periphery of the door is pressed when the door is closed,
The first portion of the weather strip that is provided along the roof side portion of the door opening edge and that is attached to a flange that protrudes in the obliquely downward direction of the vehicle has an overhanging width from the mounting base on the door opening outer peripheral side. Is formed larger than the overhanging portion on the inner peripheral side of the door opening, and a second of the door opening edges is provided along a front vertical edge to which the door is hinged and attached to a flange protruding rearward . portion, the overhang width of the side portion of the door opening outer periphery substantially the same as the first portion, formed shorter than the projecting width of the first portion of the side surface portion of the door opening peripheral side , weather provided along the rear longitudinal edges a third portion attached to a flange that protrudes toward the front of the door opening edge of the strip, the projecting width of the side portion of the door opening peripheral side The Serial substantially the same as the first portion, shorter than the above overhang width of the first portion of the side surface portion of the door opening the outer peripheral side,
The cross-sectional shape gradually changes from the cross-sectional shape of one part to the cross-sectional shape of the other part of the boundary part of the first part and the second part and the boundary part of the first part and the third part. Forming,
A weather strip for automobiles, wherein the seal walls of the first, second and third portions are set on a surface substantially orthogonal to the pressing direction of the door in a state where the weather strip is attached.

The fourth portion of the weather strip that is provided along the rocker portion that forms the lower edge of the door opening edge and is attached to a flange that protrudes vertically upward has a hollow seal portion substantially the same as the second portion. The weather strip for automobiles according to claim 1, wherein the weather strip is formed in a cross-sectional shape.