JP3882355B2 - Filling port seal - Google Patents

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Publication number
JP3882355B2
JP3882355B2 JP24780398A JP24780398A JP3882355B2 JP 3882355 B2 JP3882355 B2 JP 3882355B2 JP 24780398 A JP24780398 A JP 24780398A JP 24780398 A JP24780398 A JP 24780398A JP 3882355 B2 JP3882355 B2 JP 3882355B2
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Japan
Prior art keywords
fuel
gun
fixed
seal
membrane member
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JP24780398A
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JPH11129769A (en
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和男 佐藤
昭二 水町
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Nok Corp
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Nok Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、例えば自動車の燃料タンクのフィラーチューブの給油口等に用いられるもので、給油口に差し込まれる給油ガンと給油口との隙間を密封する給油口シールに関する。
【0002】
【従来の技術】
従来、この種の給油口シールとしては、たとえば図7(a)に示すようなリップタイプの給油口シール40が知られている。
【0003】
すなわち、この給油口シール40は、ワッシャ状の固定部41と、この固定部41の内径端から給油口43の奥に向かって延びるリップ部42とを備えており、固定部41が給油口43の開口端部44に固定されていた。
【0004】
このリップ部42は、図7(a)に拡大して示すように、リップ中間部L1とリップ先端部L2とを有し、リップ先端部L2内周だけで給油ガン45外周に摺動自在に密接させるだけの剛性を備えるために、リップ中間部L1で2mm程度、リップ先端部L2で3mm程度の厚みに形成されていた。
【0005】
そして、給油の際には、図7(b)に示すように、給油口43内に挿入される給油ガン45外周をリップ部42のリップ先端部L2内周に摺動自在に密接し、給油ガン45と給油口43の間の隙間をシールするようになっていた。
【0006】
【発明が解決しようとする課題】
しかしながら、給油ガン45の径は様々で、上記した従来のリップタイプの給油口シールの場合には、給油ガン45の径の相異なる大きさに適合させてシールするためには、リップ部42を大きく変形させなければならない。しかし、剛性を備えたリップ部42を大きく変形させるには給油ガン45の挿入に大きな力を要し、給油作業の作業性が悪くなる。また、給油ガン45の挿入を繰り返すことから、リップ部42の耐久性にも問題があった。
【0007】
さらに、リップ部42の変形だけで、給油ガン45の径の大きさに適合させるには、先端径の適合範囲に自ずと限界がある。径の小さな給油ガン45に合わせると径の大きな給油ガン45には対応できず、径の大きな給油ガン45に合わせると径の小さな給油ガン45のシールができないという問題があった。
【0008】
本発明は上記の従来技術の課題を解決するためになされたもので、その目的とするところは、給油ガンの径に関わらず給油ガンの挿入をスムーズに行い得る給油口シールを提供することにある。
【0009】
【課題を解決するための手段】
上記目的を達成するために本発明にあっては、給油口内周に備えられ、該給油口に差し込まれる給油ガンとの隙間を密封する給油口シールであって、該給油口は、円筒状のハウジング本体と、該ハウジング本体内周に軸方向に摺動自在に組み込まれたスライドガイドから構成されており、前記給油口シールは弾性材製の筒状膜部材を備え、該筒状膜部材は、給油口の開口側の外側端部が前記ハウジング本体に係合されて軸方向に不動に固定される固定端部と、中心軸に向かって凹状に縮径された断面略円弧形状に成形され、その一端が前記固定端部と連続しているくびれ部と、半径方向外方に球帯状に膨らんだ湾曲形状を有して前記くびれ部の他端と連続しおり、前記スライドガイドに固定され前記給油ガンが押し込まれる方向に移動可能に設けられた、給油口の奥側の可動端部と、を備え、前記くびれ部は、前記固定端部側に位置し、前記給油ガンの先端に当接する給油口開口側湾曲面部と、前記給油ガンによって給油口の奥側に押し込まれるのに追従して前記給油ガン外周に接触するガン接触部と、前記ガン接触部と前記可動端部との間で前記給油ガンによって軸方向に押圧される給油口奥側湾曲面部と、を備えたことを特徴とする。
【0010】
これにより、給油ガンが挿入されると給油ガンの先端が当接部に当接し、さらに挿入すると当接部が給油口の奥側へ押し込まれ、この時くびれ部も当接部に追従し、くびれ部は変形して引き込まれつつ弾性復元力によって給油ガン外周をくわえ込むようにシールするので、膜部材の挿入時の抵抗をなくすことができる。
【0011】
前記筒状膜部材の前記可動端部は、前記可動端部の内周形状に倣った球帯状の湾曲部を有するシール押えを介して前記スライドガイドに固定されると共に、前記シール押えの前記湾曲部と前記スライドガイドの内周面との間で挟持固定されることが好ましい。
【0012】
前記筒状膜部材の前記可動端部は、前記スライドガイドの内周側に固定されており、前記スライドガイドは、その外周側に設けられた付勢手段によって、前記給油口の開口側の方向に付勢されることが好ましい。
【0013】
【発明の実施の形態】
以下に図面を参照して、この発明の好適な実施の形態を例示的に詳しく説明する。ただし、この実施の形態に記載されている構成部品の寸法、材質、形状、その相対配置などは、特に特定的な記載がないかぎりは、この発明の範囲をそれらのみに限定する趣旨のものではない。
【0014】
(第1の実施の形態)
図1、図2において、給油口シール1は、ゴム状弾性材製の伸縮自在の筒状膜部材2を備え、給油口を構成するシールハウジング3に一体的に組み込まれている。
【0015】
筒状膜部材2の図1(b)に示す膜厚M1は、0.6〜1.3mm程度の厚みで形成されるのが望ましく、これにより膜全体が柔軟性に富んでいる。
【0016】
この筒状膜部材2には、鼓形状に一部縮径されたくびれ部201が設けられ、このくびれ部201内周径が給油口に差し込まれる給油ガン(給油ガンのノズル部)9外周に密接してシールするようになっている。
【0017】
くびれ部201は中心軸Cに向かって凹状に縮径された断面略円弧形状(図示例では半円状)に成形されている。
【0018】
筒状膜部材2の外部空間に通じる開口側Aの外側端部は、シールハウジング3に対して軸方向に不動に固定される固定端部202となっており、燃料タンクに通じるタンク側Oの端部がシールハウジング3に対して軸方向に可動に取り付けられる可動端部203となっている。
【0019】
固定端部202は半径方向にフランジ状に張り出しており、円弧状のくびれ部201の一端と連続している。
【0020】
一方、可動端部203はくびれ部201とは反対に半径方向外方に球帯状膨らんだ湾曲形状となっており、くびれ部201の他端と連続している。
【0021】
シールハウジング3は、円筒状のハウジング本体4と、このハウジング本体4内周に軸方向に摺動自在に組み込まれた円筒状のスライドガイド5とから構成されており、筒状膜部材2の固定端部202がハウジング本体4に固定され、可動端部203がスライドガイド5に固定されている。
【0022】
ハウジング本体4はフランジ付円筒形状で、円筒部401と、この円筒部401の開口側A端部に張り出し成形される固定フランジ402とから構成され、この固定フランジ402に筒状膜部材2の固定端部202が係合され、固定側シール押え6によって固定されている。
【0023】
固定側シール押え6もフランジ付円筒形状で、円筒部601と、この円筒部601のタンク側O端部に張り出す押えフランジ602とから構成され、押えフランジ602を固定フランジ402に接合して不図示のボルトにより締付けることにより、筒状膜部材2の固定端部202を挟持固定している。
【0024】
固定端部202には固定フランジ402の接合面に設けられた環状溝402aに係合される環状突起202aが設けられ、固定端部202の中心軸C方向への引き込みを規制している。
【0025】
スライドガイド5は大径部501と小径部502を備えた段付きの円筒状部材で、その内周面のタンク側O端部に可動側シール押え7を介して筒状膜部材2の可動端部203が固定されている。ハウジング本体4内周には大径部501部外周面が摺動自在に接触している。
【0026】
可動側シール押え7は筒状膜部材2の可動端部203の内周形状に倣った球帯状に湾曲筒部701と、スライドガイド5のタンク側Oの端部内周面に形成されて、段差部503に係合する外向きつば部702とから構成され、筒状膜部材2の可動端部203の内周に圧入され、可動側シール押え7の湾曲部701とスライドガイド5の内周面との間で可動端部203を挟持固定している。
【0027】
この筒状膜部材2の可動端部203外周にはスライドガイド5の内周に形成された環状溝502aに係合する環状突起203aが設けられている。
【0028】
また、シールハウジング3には、筒状膜部材2の可動端部203を給油口の開口側Aの方向に常時付勢し、給油ガン9を給油口から抜き取る際に、可動端部203を給油ガン9の挿入時に移動した位置から初期位置に復帰させる復帰手段としてのスプリング8が設けられている。
【0029】
スプリング8はスライドガイド5の小径部502の外周面とハウジング本体4の内周面間の環状隙間に軸方向に収縮状態で装着され、その一端が大径部501との境界の段差部801に係合し、他端がハウジング本体4のタンク側O端部内周に設けられた内向きに突出するばね受け部802に係合している。
【0030】
このスプリング8のばね付勢力によって、スライドガイド5が、ハウジング本体4の開口側A端部内周に設けられた内向きのストッパ部403に突き当てられており、このストッパ部403に突き当てられた位置が筒状膜部材2の可動端部203の初期位置である。
【0031】
図3は本実施形態の給油口シール1が適用される燃料タンクの概念図である。
【0032】
すなわち、燃料タンク31には給油用のフィラーチューブ32が上方に延びていて、このフィラーチューブ32の開口部、あるいは、その近傍に給油口シール1が装着される。本実施の形態では、筒状膜部材2をシールハウジング3に組付けた状態でフィラーチューブ32に取付けられる。もちろん、シールハウジング3を介さないでフィラーチューブ32に直接筒状膜部材2を装着するようにしてもよい。
【0033】
給油口シール1は燃料タンク31へのガソリンや軽油等の燃料の給油中に、給油ガン9と給油口33との隙間をシールして燃料蒸気の漏洩を防止するものである。給油中に液体の燃料によって置換される燃料タンク31内の燃料蒸気は満タン規制バルブ34や燃料遮蔽バルブ35を通じてキャニスタ36に導かれる。
【0034】
本実施の形態の給油口シール1にあっては、給油口33への給油ガン9挿入前は、スプリング8によりスライドガイド5を介して筒状膜部材2の可動端部203が固定端部202側に向かって軸方向に押し付けられて初期形状となっており、くびれ部201の内径であるシール径Dは縮小された状態にある。
【0035】
給油ガン9が挿入されると、給油ガン9の先端がくびれ部201の最小径部Dよりも固定端部202側の湾曲面部201Aに当接し、くびれ部201が軸方向タンク側Oに押され、給油ガン9とくびれ部201との摩擦力によって、くびれ部201の給油ガン9との接触部201Bと固定端部202の間の湾曲面部201Aが軸方向に伸ばされると同時に同方向に延びて、シール径Dが広がり、給油ガン9外周をくわえ込むようにシールする。
【0036】
この時、ガン接触部201Bと可動端部203間の湾曲面部201Cは給油ガン9によって軸方向押圧されるが、スライドガイド5を介して軸方向タンク側Oに所定量S逃げるので、給油ガン9の押し込み抵抗が軽減され、スムーズに挿入することができる。
【0037】
給油ガン9の径が大きい場合でも、筒状膜部材2のくびれ部201が給油ガン9の押圧力によって軸方向に伸びて径が広がるので、抵抗は小さい。
【0038】
給油が終了して給油ガン9を抜き取ると、筒状膜部材2の可動端部203は、筒状膜部材2の弾性復元力とスプリング8のばね力によって、スライドガイド5を介して初期位置に復帰し、筒状膜部材2は初期形状に保たれる。
【0041】
(第参考例)図4は第参考例に係る給油口シールを示し、図4(a)は給油ガン挿入前の状態を示し、図4(b)は給油ガンを挿入してシールした状態を示す。
【0042】
図4において、給油口シール1は、ゴム状弾性材製の伸縮自在の筒状膜部材2を備え、給油口を構成するシールハウジング3に一体的に組み込まれている。ここで、第1の実施の形態と同一の構成部分については同一の符号を付す。
【0043】
この筒状膜部材2には、鼓形状に一部縮径されたくびれ部201が設けられ、このくびれ部201内周径が給油口に差し込まれる給油ガン9外周に密接してシールするようになっている。
【0044】
くびれ部201は中心方向に向かって凹状に縮径された断面略円弧形状(図示例では半円状)に成形されている。
【0045】
筒状膜部材2の給油口奥の燃料タンクに通じるタンク側Oの内側端部は、シールハウジング3に対して軸方向に不動に固定される固定端部202となっており、外部空間に通じる開口側Aの外側端部がシールハウジング3に対して軸方向に可動に取り付けられる可動端部203となっている。
【0046】
固定端部202は円弧状のくびれ部201の一端と連続している。一方、可動端部203もくびれ部201の他端と連続している。
【0047】
シールハウジング3は、円筒状のハウジング本体4と、このハウジング本体4内周に軸方向に摺動自在に組み込まれた円筒状のスライド部材としてのスライドガイド5とから構成されており、筒状膜部材2の固定端部202がハウジング本体4に固定され、可動端部203がスライドガイド5に固定されている。
【0048】
このスライドガイド5は差し込まれた給油ガン9の先端に当接する当接部503を備えている。
【0049】
ハウジング本体4はフランジ付円筒形状で、円筒部401と、この円筒部401の開口側A端部に張り出し成形される固定フランジ402とから構成され、この円筒部401のタンク側O端部に筒状膜部材2の固定端部202が係合して固定されている。
【0050】
固定端部202には円筒部401のタンク側O端部の接合面に設けられた環状溝401aに係合される環状突起202aが設けられ、固定端部202の径の中心方向への引き込みを規制している。
【0051】
スライドガイド5は大径部501と小径部502を備えた段付きの円筒状部材で、その内周面の開口側A端部に筒状膜部材2の可動端部203が固定されている。ハウジング本体4内周には大径部501部及び小径部502の外周面が摺動自在に接触している。小径部502はハウジング本体4からタンク側Oに突き出しており、その先端に差し込まれた給油ガン9の先端に当接する先端に行く程小径となる円すい形状の当接部503を備えている。
【0052】
参考例の当接部503の先端には差し込まれた給油ガン9の給油燃料の流入を効率よく行うための切欠き503aが設けられている。
【0053】
この筒状膜部材2の可動端部203外周にはスライドガイド5の内周に形成された環状溝501aに係合する環状突起203aが設けられている。
【0054】
また、シールハウジング3には、筒状膜部材2の可動端部203を給油口の開口側Aの方向に常時付勢し、給油ガン9を給油口から抜き取る際に、可動端部203を給油ガン9の挿入時に移動した位置から初期位置に復帰させる復帰手段としてのスプリング8が設けられている。
【0055】
スプリング8はスライドガイド5の小径部502の外周面とハウジング本体4の内周面間の環状隙間に軸方向に収縮状態で装着され、その一端が大径部501との境界の段差部801に係合し、他端がハウジング本体4のタンク側O端部内周に設けられた内向きに突出するばね受け部802に係合している。
【0056】
このスプリング8のばね付勢力によって、スライドガイド5の当接部503をハウジング本体4のタンク側O端部に引っ掛るようになっており、この当接部503が引っ掛かった位置が筒状膜部材2の可動端部203の初期位置である。
【0057】
参考例の給油口シール1にあっては、給油口への給油ガン9の挿入前は、スプリング8によりスライドガイド5を介して筒状膜部材2の可動端部203が開口側Aの方向に向かって押された初期形状となっており、くびれ部201の内径であるシール径Dは拡がった状態にある。
【0058】
給油ガン9が挿入されると、給油ガン9の先端が当接部503に当接し、給油ガン9の挿入に応じてスライドガイド5を介してくびれ部201が縮径するように可動端部203が軸方向タンク側Oに所定量S押され、給油ガン9外周とくびれ部201内周とが密接し、シール径Dが縮まり、給油ガン9外周をくわえ込むようにシールする。
【0059】
この時、給油ガン9の挿入の際、給油ガン9の押し込み抵抗がないので、スムーズに挿入することができる。
【0060】
給油ガンの径が大きい場合でも、筒状膜部材2のくびれ部201が給油ガン9の挿入によって径が縮まるので、抵抗はない。
【0061】
給油が終了して給油ガン9を抜き取ると、筒状膜部材2の可動端部203は、筒状膜部材2の初期形状に戻ろうとする弾性復元力とスプリング8のばね力によって、スライドガイド5を介して初期位置に復帰し、筒状膜部材2は初期形状に保たれる。
【0062】
(第参考例)図5は第参考例に係る給油口シールを示し、図5(a)は給油ガン挿入前の状態を示し、図5(b)は給油ガン挿入時のシールした状態を示す。
【0063】
図5において、給油口シール1は、ゴム状弾性材製の伸縮自在の膜部材2’を備え、給油口を構成するシールハウジング3に一体的に組み込まれている。ここで、第1の実施の形態と同一の構成部分については同一の符号を付す。
【0064】
この膜部材2’には、一部縮径されたくびれ部201’が設けられ、このくびれ部201’内周径が給油口に差し込まれる給油ガン9外周に密接してシールするようになっている。
【0065】
膜部材2’は、くびれ部201’が開口側Aに向かって凸となっており、概略断面サイクロイド曲線形状に成形されている。
【0066】
膜部材2’は給油口を構成するシールハウジング3に対して軸方向に不動に固定される固定端部202’と、給油ガン9が挿入される膜部材2’中央部で給油ガン9の先端に当接する当接部204’と、を備えている。
【0067】
固定端部202’は円弧状のくびれ部201’の一端と連続している。一方、当接部204’もくびれ部201’の他端と連続している。
【0068】
シールハウジング3は、円筒状であり、膜部材2’の固定端部202’が固定される環状溝301を備えている。
【0069】
固定端部202’にはシールハウジング3の接合面に設けられた環状溝301に係合される環状突起202a’が設けられ、固定端部202’の径の中心方向への引き込みを規制している。
【0070】
また、当接部204’には差し込まれた給油ガン9から給油燃料を流入する孔204a’が設けられている。
【0071】
参考例の給油口シール1にあっては、給油口への給油ガン9挿入前は、膜部材2’の初期形状に戻ろうとする弾性復元力により、ほぼ初期形状のまま維持される。
【0072】
給油ガン9が挿入されると、給油ガン9の先端が当接部204’に当接し、さらに挿入すると当接部204’がタンク側Oへ押し込まれる。
【0073】
このとき、当接部204’の周りのくびれ部201’も当接部204’に追従し、くびれ部201’は引き込まれつつ弾性復元力によって給油ガン9外周をくわえ込むようにシールする。
【0074】
この時、給油ガン9の挿入の際、給油ガン9の押し込み抵抗がないので、スムーズに挿入することができる。
【0075】
給油が終了して給油ガン9を抜き取ると、膜部材2’は弾性復元力によって初期形状に保たれる。
【0076】
(第参考例)図6は第参考例に係る給油口シールを示し、図6(a)は給油ガン挿入前の状態を示し、図6(b)は給油ガンを挿入してシールした状態を示す。
【0077】
図6において、給油口シール1は、ゴム状弾性材製の伸縮自在の筒状膜部材2を備え、給油口を構成するシールハウジング3に一体的に組み込まれている。ここで、第1の実施の形態と同一の構成部分については同一の符号を付す。
【0078】
この筒状膜部材2には、鼓形状に一部縮径されたくびれ部201が設けられ、このくびれ部201内周径が給油口に差し込まれる給油ガン9外周に密接してシールするようになっている。
【0079】
くびれ部201は中心に向かって凹状に縮径された断面略円弧形状(図示例では半円状)に成形されている。
【0080】
筒状膜部材2の外部空間に通じる開口側Aの外側端部が、シールハウジング3に対して軸方向に不動に固定される固定端部202となっており、給油口奥の燃料タンクに通じるタンク側Oの内側端部は、シールハウジング3に対して軸方向に可動に取り付けられる可動端部203となっている。
【0081】
固定端部202は円弧状のくびれ部201の一端と連続している。一方、可動端部203もくびれ部201の他端と連続している。
【0082】
シールハウジング3は、円筒状のハウジング本体4と、このハウジング本体4内周に組み込まれ、給油ガン9の挿入に応じて筒状膜部材2のくびれ部201を収縮させるために軸方向にスライドするスライド機構5’とから構成されており、筒状膜部材2の固定端部202がハウジング本体4に固定され、可動端部203がスライド機構5’の第1スリーブ501’に固定されている。
【0083】
ハウジング本体4はフランジ付円筒形状で、円筒部401と、この円筒部401の開口側A端部に張り出し成形される固定フランジ402とから構成され、この円筒部401の開口側Aの外側端部に筒状膜部材2の固定端部202が係合して固定されている。
【0084】
固定端部202には固定フランジ402の開口側Aの外側端部の接合面に設けられた環状溝402aに係合される環状突起202aが設けられ、固定端部202の径の中心方向への引き込みを規制している。
【0085】
スライド機構5’は可動端部203が固定された第1スリーブ501’と、差し込まれた給油ガン9の外周に摺接する爪部506’を有する第2スリーブ502’と、を備えている。第1スリーブ501’と第2スリーブ502’は、それぞれ第1ロッド503’と第2ロッド504’によってハウジング本体4の支持部404に中央を支持されたレバー505’の両端にそれぞれ連結されている。
【0086】
第1スリーブ501’はタンク側Oへの規制を行うストッパ部501b’を有すると共に、第1ロッド503’及び筒状膜部材2の可動端部203が固定され、開口側Aに向かって軸方向に移動可能となっている。
【0087】
第2スリーブ502’は、第1スリーブ501’がタンク側Oへ規制されるため、レバー505’によって開口側Aへの規制が行われ、タンク側Oに向かって軸方向に移動可能となっている。
【0088】
即ち、レバー505’は、第1スリーブ501’と第2スリーブ502’の内どちらか一方がタンク側O或は開口側Aに移動した場合、他方を一方が移動した方向と逆方向に移動させるように第1スリーブ501’と第2スリーブ502’を連結するものである。
【0089】
この筒状膜部材2の可動端部203には第1スリーブ501’の内周に形成された環状溝501a’に係合する環状突起203aが設けられている。
【0090】
また、シールハウジング3には、筒状膜部材2の可動端部203を固定した第1スリーブ501’を給油口のタンク側Oの方向に常時付勢し、給油ガン9を給油口から抜き取る際に、可動端部203を給油ガン9の挿入時に移動した位置から初期位置に復帰させる復帰手段としてのスプリング8が設けられている。
【0091】
スプリング8は第1スリーブ501’とハウジング本体4の内周面間の環状隙間に軸方向に収縮状態で装着されている。
【0092】
このスプリング8のばね付勢力によって、上述したように第1スリーブ501’のストッパ部501b’をハウジング本体4に設けられたレバー505’の支持部403に当接するようになっており、このストッパ部501b’が当接した位置が第1スリーブ501’の初期位置となり、即ち、筒状膜部材2の可動端部203の初期位置となる。
【0093】
参考例の給油口シール1にあっては、給油口への給油ガン9の挿入前は、スプリング8により第1スリーブ501’を介して筒状膜部材2の可動端部203がタンク側Oの方向に向かって押された初期形状となっており、くびれ部201の内径であるシール径Dは拡がった状態にある。
【0094】
給油ガン9が挿入されると、給油ガン9の外周が第2スリーブ502’の爪部506’と摺接して給油ガン9の挿入に応じて第2スリーブ502’がタンク側Oに引き込まれ、レバー505’を介し、くびれ部201が縮径するように第1スリーブ501’が軸方向開口側Aに所定量S押され、給油ガン9外周とくびれ部201内周とが密接し、シール径Dが縮まり、給油ガン9外周をくわえ込むようにシールする。
【0095】
給油ガン9の径が大きい場合でも、筒状膜部材2のくびれ部201が給油ガン9の挿入によって径が縮まるので、抵抗はない。
【0096】
給油が終了して給油ガン9を抜き取ると、筒状膜部材2の可動端部203は、筒状膜部材2の初期形状に戻ろうとする弾性復元力とスプリング8のばね力によって、第1スリーブ501’を介して初期位置に復帰し、筒状膜部材2は初期形状に保たれる。
【0097】
尚、本参考例の第2スリーブ502’の爪部506’は差し込まれた給油ガン9の挿入量を規制する働きは必要なく、摺接して第2スリーブ502’をタンク側Oに引き込むだけなので、比較的硬度を有する弾製材で設けることができる。
【0098】
【発明の効果】
本発明によれば、給油ガン外周を筒状膜部材のくびれ部によってシールするようにしたので、給油するべく給油ガンを給油口に挿入すると、筒状膜部材のくびれ部に給油ガン外周が密接し、給油ガンを包み込むようにしてシールすることができ、給油ガンをスムーズに挿入することができる。
【0099】
また、伸縮性に富む変形し易い筒状膜部材を用いたので、応力が局部的に集中せず筒状膜部材全体に拡散するので耐久性が向上すると共に、給油ガン径に対する適合範囲も大きくとれる。
【0100】
給油口シールは弾性材製の膜部材を備え、膜部材は、給油ガンの先端に当接する当接部と、当接部が給油ガンによって給油口の奥側に押し込まれるのに追従して給油ガン外周に密接するくびれ部と、を備えたことで、給油ガンが挿入されると給油ガンの先端が当接部に当接し、さらに挿入すると当接部が給油口の奥側へ押し込まれ、この時くびれ部も当接部に追従し、くびれ部は変形して引き込まれつつ弾性復元力によって給油ガン外周をくわえ込むようにシールするので、膜部材の挿入時の抵抗をなくすことができる。
【図面の簡単な説明】
【図1】図1(a)は第1の実施の形態に係る給油口シールの断面図、(b)は同図(a)の筒状膜部材の半断面正面図である。
【図2】図2(a)は第1の実施の形態の給油ガン挿入時における断面図、(b)は第1の実施の形態の給油ガン挿入時の筒状膜部材の変形状態を示す部分拡大断面図である。
【図3】図3は第1の実施の形態の給油口シールが適用される燃料タンクの概略構成図である。
【図4】図4(a)は第参考例の給油ガン挿入前における断面図、(b)は第参考例の給油ガン挿入時における断面図である。
【図5】図5(a)は第参考例の給油ガン挿入前における断面図、(b)は第参考例の給油ガン挿入時における断面図である。
【図6】図6(a)は第参考例の給油ガン挿入前における断面図、(b)は第参考例の給油ガン挿入時における断面図である。
【図7】図7(a)は従来の給油口シールの一例を表す断面図、(b)は同図(a)の給油ガン挿入時における断面図である。
【符号の説明】
2 筒状膜部材
201 筒状膜部材のくびれ部
202 筒状膜部材の固定端部
203 筒状膜部材の可動端部
2’ 膜部材
201’ 膜部材のくびれ部
202’ 膜部材の固定端部
204’ 膜部材の当接部
4 ハウジング本体
5 スライドガイド
5’ スライド機構
6 固定側シール押え
7 可動側シール押え
8 スプリング
9 給油ガン
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuel filler seal that is used, for example, in a filler port of a filler tube of a fuel tank of an automobile and seals a gap between a fuel gun inserted into the fuel filler port and a fuel filler port.
[0002]
[Prior art]
Conventionally, as this type of filler seal, for example, a lip type filler seal 40 as shown in FIG. 7A is known.
[0003]
That is, the oil filler seal 40 includes a washer-like fixing part 41 and a lip part 42 extending from the inner diameter end of the fixing part 41 toward the back of the oil filler 43, and the fixing part 41 is provided with the oil inlet 43. It was being fixed to the opening edge part 44.
[0004]
As shown in an enlarged view in FIG. 7A, the lip portion 42 has a lip intermediate portion L1 and a lip tip portion L2, and is slidable on the outer periphery of the fuel gun 45 only at the inner periphery of the lip tip portion L2. In order to provide sufficient rigidity, the lip middle portion L1 has a thickness of about 2 mm and the lip tip portion L2 has a thickness of about 3 mm.
[0005]
When refueling, as shown in FIG. 7 (b), the outer periphery of the fuel gun 45 inserted into the oil supply port 43 is slidably brought into close contact with the inner periphery of the lip tip portion L 2 of the lip portion 42. The gap between the gun 45 and the fuel filler 43 was sealed.
[0006]
[Problems to be solved by the invention]
However, the diameter of the fuel gun 45 varies, and in the case of the above-described conventional lip type fuel filler seal, the lip portion 42 is used for sealing in conformity with the different sizes of the diameter of the fuel gun 45. It must be greatly deformed. However, in order to greatly deform the lip portion 42 having rigidity, a large force is required for inserting the oil supply gun 45, and the workability of the oil supply work is deteriorated. Further, since the insertion of the fuel gun 45 is repeated, there is a problem in the durability of the lip portion 42.
[0007]
Furthermore, in order to adapt to the size of the diameter of the oil supply gun 45 only by the deformation of the lip portion 42, the adaptable range of the tip diameter is naturally limited. There is a problem that when the oil gun is fitted to the small diameter oil gun 45, the oil gun 45 cannot be adapted to the large oil gun 45, and when the oil gun is arranged to the large diameter oil gun 45, the small oil gun 45 cannot be sealed.
[0008]
The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a fuel filler seal that can smoothly insert a fuel gun regardless of the diameter of the fuel gun. is there.
[0009]
[Means for Solving the Problems]
  In order to achieve the above object, in the present invention, a fuel filler seal is provided on the inner periphery of a fuel filler, and seals a gap between a fuel gun inserted into the fuel filler,The oil filler port is composed of a cylindrical housing body and a slide guide that is slidably incorporated in the inner periphery of the housing body in the axial direction.The filler seal is,A cylindrical membrane member made of an elastic material is provided.The outer end on the opening side of the filler opening is engaged with the housing main body and fixed in an axially fixed manner, and is formed into a substantially arc shape in cross section that is reduced in diameter toward the central axis. One end of the constricted portion is continuous with the fixed end portion, and the other end of the constricted portion has a curved shape that swells in a spherical shape radially outward,A movable end on the back side of the fuel filler opening, which is fixed to the slide guide and is movable in the direction in which the fuel gun is pushed,The constricted portion is positioned on the fixed end portion side, and follows a filling port opening-side curved surface portion that comes into contact with the tip of the filling gun and being pushed into the back side of the filling port by the filling gun. A gun contact portion that comes into contact with the outer periphery of the fuel gun, and a gas inlet opening-side curved surface portion that is pressed in the axial direction by the fuel gun between the gun contact portion and the movable end;It is provided with.
[0010]
  As a result, when the fueling gun is inserted, the tip of the fueling gun comes into contact with the contact part, and when further inserted, the contact part is pushed into the back side of the fueling port, and at this time the constricted part also follows the contact part, Since the constricted portion is deformed and pulled in and sealed so as to hold the outer periphery of the fuel gun by an elastic restoring force, resistance during insertion of the membrane member can be eliminated.
[0011]
  The movable end portion of the tubular film member is formed of the movable end portion.Inner circumferenceFollowed the shapeSphere-like curved partSeal presser withAnd is fixed to the slide guide through the curved portion of the seal presserThe slide guideInner peripheral surfaceIt is preferable to be sandwiched and fixed between.
[0012]
  The movable end portion of the tubular film member is fixed to the inner peripheral side of the slide guide, and the slide guide is directed in the direction of the opening side of the fuel filler opening by an urging means provided on the outer peripheral side. It is preferable to be biased.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Exemplary embodiments of the present invention will be described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. Absent.
[0014]
(First embodiment)
1 and 2, an oil filler seal 1 includes an elastic tubular membrane member 2 made of a rubber-like elastic material, and is integrally incorporated in a seal housing 3 that constitutes an oil filler opening.
[0015]
The film thickness M1 of the tubular membrane member 2 shown in FIG. 1 (b) is desirably formed with a thickness of about 0.6 to 1.3 mm, so that the entire membrane is rich in flexibility.
[0016]
The tubular membrane member 2 is provided with a constricted portion 201 whose diameter is partially reduced in a drum shape, and an inner peripheral diameter of the constricted portion 201 is inserted into an outer periphery of a fuel gun (a nozzle portion of the fuel gun) 9. It comes to seal closely.
[0017]
The constricted portion 201 is formed in a substantially circular arc shape (in the illustrated example, a semicircular shape) whose diameter is reduced in a concave shape toward the central axis C.
[0018]
The outer end portion on the opening side A that leads to the external space of the tubular membrane member 2 is a fixed end portion 202 that is fixed to the seal housing 3 in the axial direction, and is on the tank side O that leads to the fuel tank. The end portion is a movable end portion 203 movably attached to the seal housing 3 in the axial direction.
[0019]
The fixed end portion 202 projects in a flange shape in the radial direction, and is continuous with one end of the arcuate constricted portion 201.
[0020]
On the other hand, the movable end 203 has a curved shape bulging outward in the radial direction opposite to the constricted portion 201, and is continuous with the other end of the constricted portion 201.
[0021]
The seal housing 3 includes a cylindrical housing body 4 and a cylindrical slide guide 5 which is incorporated in the inner periphery of the housing body 4 so as to be slidable in the axial direction. The end 202 is fixed to the housing body 4, and the movable end 203 is fixed to the slide guide 5.
[0022]
The housing main body 4 has a cylindrical shape with a flange, and includes a cylindrical portion 401 and a fixed flange 402 that is formed to be projected at the opening side A end of the cylindrical portion 401. The tubular membrane member 2 is fixed to the fixed flange 402. The end 202 is engaged and fixed by the fixed-side seal presser 6.
[0023]
The fixed-side seal retainer 6 is also in a cylindrical shape with a flange, and includes a cylindrical portion 601 and a retainer flange 602 that projects to the tank-side O end of the cylindrical portion 601. The retainer flange 602 is joined to the fixed flange 402 and is not fixed. The fixed end 202 of the tubular membrane member 2 is clamped and fixed by tightening with the illustrated bolt.
[0024]
The fixed end 202 is provided with an annular protrusion 202a that is engaged with an annular groove 402a provided on the joint surface of the fixed flange 402, and restricts the pulling of the fixed end 202 in the direction of the central axis C.
[0025]
The slide guide 5 is a stepped cylindrical member having a large-diameter portion 501 and a small-diameter portion 502, and a movable end of the tubular membrane member 2 via a movable-side seal retainer 7 at the tank-side O end portion of the inner peripheral surface thereof. The part 203 is fixed. The outer peripheral surface of the large diameter portion 501 is slidably in contact with the inner periphery of the housing body 4.
[0026]
The movable side seal presser 7 is formed on the curved cylindrical portion 701 in the shape of a sphere following the inner peripheral shape of the movable end portion 203 of the cylindrical membrane member 2 and on the inner peripheral surface of the end of the slide guide 5 on the tank side O. The outer flange portion 702 that engages with the portion 503 is press-fitted into the inner periphery of the movable end portion 203 of the tubular membrane member 2, and the curved portion 701 of the movable side seal retainer 7 and the inner peripheral surface of the slide guide 5. The movable end 203 is sandwiched and fixed between the two.
[0027]
An annular protrusion 203 a that engages with an annular groove 502 a formed on the inner periphery of the slide guide 5 is provided on the outer periphery of the movable end 203 of the tubular film member 2.
[0028]
Further, the movable end 203 of the tubular membrane member 2 is always urged in the seal housing 3 in the direction of the opening A of the fuel filler port, and the movable end 203 is lubricated when the fuel gun 9 is removed from the fuel filler port. A spring 8 is provided as return means for returning from the position moved when the gun 9 is inserted to the initial position.
[0029]
The spring 8 is attached to an annular gap between the outer peripheral surface of the small diameter portion 502 of the slide guide 5 and the inner peripheral surface of the housing body 4 in an axially contracted state, and one end of the spring 8 is in a step portion 801 at the boundary with the large diameter portion 501. The other end is engaged with an inwardly projecting spring receiving portion 802 provided on the inner periphery of the tank side O end of the housing body 4.
[0030]
Due to the spring biasing force of the spring 8, the slide guide 5 is abutted against an inward stopper portion 403 provided on the inner periphery of the opening side A end of the housing body 4, and abutted against the stopper portion 403. The position is the initial position of the movable end 203 of the tubular film member 2.
[0031]
FIG. 3 is a conceptual diagram of a fuel tank to which the fuel filler seal 1 of this embodiment is applied.
[0032]
That is, a filler tube 32 for fuel supply extends upward in the fuel tank 31, and the fuel filler seal 1 is attached to the opening of the filler tube 32 or in the vicinity thereof. In the present embodiment, the tubular membrane member 2 is attached to the filler tube 32 in a state where it is assembled to the seal housing 3. Of course, the tubular membrane member 2 may be directly attached to the filler tube 32 without the seal housing 3 interposed therebetween.
[0033]
The fuel filler seal 1 seals the gap between the fuel gun 9 and the fuel filler 33 and prevents the fuel vapor from leaking while fuel such as gasoline or light oil is supplied to the fuel tank 31. The fuel vapor in the fuel tank 31 that is replaced by liquid fuel during refueling is guided to the canister 36 through the full tank regulating valve 34 and the fuel shielding valve 35.
[0034]
In the fuel filler seal 1 of the present embodiment, before the fuel gun 9 is inserted into the fuel filler 33, the movable end 203 of the tubular membrane member 2 is fixed to the fixed end 202 via the slide guide 5 by the spring 8. It is pressed in the axial direction toward the side to have an initial shape, and the seal diameter D which is the inner diameter of the constricted portion 201 is in a reduced state.
[0035]
When the fueling gun 9 is inserted, the tip of the fueling gun 9 comes into contact with the curved surface part 201A on the fixed end 202 side of the minimum diameter part D of the constricted part 201, and the constricted part 201 is pushed toward the axial tank side O. The curved surface portion 201A between the contact portion 201B of the constriction portion 201 and the oil supply gun 9 and the fixed end portion 202 extends in the axial direction and simultaneously extends in the same direction by the frictional force between the refueling gun 9 and the constriction portion 201. The seal diameter D is widened and sealing is performed so that the outer periphery of the fuel gun 9 is added.
[0036]
At this time, the curved surface portion 201 </ b> C between the gun contact portion 201 </ b> B and the movable end portion 203 is axially pressed by the oil supply gun 9, but escapes a predetermined amount S to the axial tank side O through the slide guide 5. The pushing resistance is reduced, and it can be inserted smoothly.
[0037]
Even when the diameter of the oil supply gun 9 is large, the constricted portion 201 of the tubular membrane member 2 extends in the axial direction by the pressing force of the oil supply gun 9 and the diameter increases, so the resistance is small.
[0038]
When refueling is completed and the fuel gun 9 is removed, the movable end 203 of the tubular membrane member 2 is moved to the initial position via the slide guide 5 by the elastic restoring force of the tubular membrane member 2 and the spring force of the spring 8. It returns, and the cylindrical membrane member 2 is maintained in the initial shape.
[0041]
  (No.1ofReference example4)1ofReference example4A shows a state before the fuel gun is inserted, and FIG. 4B shows a state where the fuel gun is inserted and sealed.
[0042]
In FIG. 4, an oil filler seal 1 is provided with a stretchable tubular membrane member 2 made of a rubber-like elastic material, and is integrally incorporated in a seal housing 3 constituting the oil filler opening. Here, the same components as those of the first embodiment are denoted by the same reference numerals.
[0043]
The cylindrical membrane member 2 is provided with a constricted portion 201 partially reduced in the drum shape, and the inner peripheral diameter of the constricted portion 201 is tightly sealed to the outer periphery of the fuel gun 9 inserted into the fuel filler port. It has become.
[0044]
The constricted portion 201 is formed in a substantially circular arc shape (in the illustrated example, a semicircular shape) that is reduced in diameter toward the center.
[0045]
The inner end of the tank side O that communicates with the fuel tank at the back of the fuel filler opening of the tubular membrane member 2 is a fixed end 202 that is fixed in the axial direction relative to the seal housing 3 and communicates with the external space. The outer end of the opening side A is a movable end 203 that is movably attached to the seal housing 3 in the axial direction.
[0046]
The fixed end portion 202 is continuous with one end of the arcuate constricted portion 201. On the other hand, the movable end portion 203 is also continuous with the other end of the constricted portion 201.
[0047]
The seal housing 3 includes a cylindrical housing body 4 and a slide guide 5 as a cylindrical slide member which is incorporated in the inner periphery of the housing body 4 so as to be slidable in the axial direction. The fixed end 202 of the member 2 is fixed to the housing body 4, and the movable end 203 is fixed to the slide guide 5.
[0048]
The slide guide 5 includes an abutting portion 503 that abuts against the tip of the inserted oil gun 9.
[0049]
The housing main body 4 has a cylindrical shape with a flange, and includes a cylindrical portion 401 and a fixed flange 402 that is formed to be extended to the opening side A end portion of the cylindrical portion 401, and a cylinder is formed at the tank side O end portion of the cylindrical portion 401. The fixed end 202 of the membrane member 2 is engaged and fixed.
[0050]
The fixed end 202 is provided with an annular protrusion 202a that is engaged with an annular groove 401a provided on the joint surface of the cylindrical portion 401 at the O end on the tank side, and pulls the diameter of the fixed end 202 toward the center. It is regulated.
[0051]
The slide guide 5 is a stepped cylindrical member having a large-diameter portion 501 and a small-diameter portion 502, and the movable end portion 203 of the tubular membrane member 2 is fixed to the opening side A end portion of the inner peripheral surface thereof. The outer peripheral surfaces of the large diameter portion 501 and the small diameter portion 502 are slidably in contact with the inner periphery of the housing body 4. The small-diameter portion 502 protrudes from the housing body 4 to the tank side O, and includes a conical contact portion 503 having a smaller diameter toward the tip that contacts the tip of the fuel gun 9 inserted into the tip.
[0052]
  BookReference exampleA notch 503a is provided at the tip of the contact portion 503 for efficiently injecting the fuel supplied from the fuel gun 9 inserted therein.
[0053]
An annular protrusion 203 a that engages with an annular groove 501 a formed on the inner periphery of the slide guide 5 is provided on the outer periphery of the movable end portion 203 of the tubular film member 2.
[0054]
Further, the movable end 203 of the tubular membrane member 2 is always urged in the seal housing 3 in the direction of the opening A of the fuel filler port, and the movable end 203 is lubricated when the fuel gun 9 is removed from the fuel filler port. A spring 8 is provided as return means for returning from the position moved when the gun 9 is inserted to the initial position.
[0055]
The spring 8 is attached to an annular gap between the outer peripheral surface of the small diameter portion 502 of the slide guide 5 and the inner peripheral surface of the housing body 4 in an axially contracted state, and one end of the spring 8 is in a step portion 801 at the boundary with the large diameter portion 501. The other end is engaged with an inwardly projecting spring receiving portion 802 provided on the inner periphery of the tank side O end of the housing body 4.
[0056]
The spring urging force of the spring 8 causes the contact portion 503 of the slide guide 5 to be hooked to the tank side O end portion of the housing body 4, and the position where the contact portion 503 is hooked is a cylindrical membrane member. This is the initial position of the second movable end 203.
[0057]
  BookReference exampleIn the fuel filler seal 1, before the fuel gun 9 is inserted into the fuel filler, the movable end 203 of the tubular membrane member 2 is directed toward the opening side A through the slide guide 5 by the spring 8. The initial shape is pushed, and the seal diameter D, which is the inner diameter of the constricted portion 201, is in an expanded state.
[0058]
When the oiling gun 9 is inserted, the tip of the oiling gun 9 comes into contact with the contact portion 503, and the movable end 203 is arranged so that the constricted part 201 is reduced in diameter through the slide guide 5 in accordance with the insertion of the oiling gun 9. Is pushed to the axial tank side O by a predetermined amount S, the outer periphery of the fuel gun 9 and the inner periphery of the constricted portion 201 are in close contact with each other, the seal diameter D is reduced, and the outer periphery of the fuel gun 9 is sealed.
[0059]
At this time, when the fuel gun 9 is inserted, there is no pushing resistance of the fuel gun 9, so that it can be smoothly inserted.
[0060]
Even when the diameter of the fuel gun is large, the diameter of the constricted portion 201 of the tubular membrane member 2 is reduced by the insertion of the fuel gun 9, so there is no resistance.
[0061]
When refueling is completed and the refueling gun 9 is pulled out, the movable end 203 of the tubular membrane member 2 is slid by the elastic restoring force to return to the initial shape of the tubular membrane member 2 and the spring force of the spring 8. To return to the initial position, and the tubular membrane member 2 is maintained in the initial shape.
[0062]
  (No.2ofReference example5)2ofReference exampleFig. 5 (a) shows a state before inserting a fuel gun, and Fig. 5 (b) shows a sealed state when the fuel gun is inserted.
[0063]
In FIG. 5, an oil filler seal 1 is provided with a stretchable membrane member 2 ′ made of a rubber-like elastic material, and is integrally incorporated in a seal housing 3 constituting the oil filler opening. Here, the same components as those of the first embodiment are denoted by the same reference numerals.
[0064]
The membrane member 2 ′ is provided with a constricted portion 201 ′ having a partially reduced diameter, and the inner peripheral diameter of the constricted portion 201 ′ is tightly sealed to the outer periphery of the fuel gun 9 inserted into the fuel filler port. Yes.
[0065]
The constricted portion 201 ′ is convex toward the opening side A, and the membrane member 2 ′ is formed in a substantially cycloidal curved shape.
[0066]
The membrane member 2 ′ has a fixed end 202 ′ that is fixed in an axially fixed manner with respect to the seal housing 3 that constitutes the oil filler opening, and the tip of the oil gun 9 at the center of the membrane member 2 ′ into which the oil gun 9 is inserted. And an abutting portion 204 ′ that abuts against.
[0067]
The fixed end 202 'is continuous with one end of the arcuate constricted portion 201'. On the other hand, the contact portion 204 'is also continuous with the other end of the constricted portion 201'.
[0068]
The seal housing 3 is cylindrical and includes an annular groove 301 to which the fixed end 202 'of the membrane member 2' is fixed.
[0069]
The fixed end 202 ′ is provided with an annular protrusion 202a ′ that is engaged with an annular groove 301 provided on the joint surface of the seal housing 3, and restricts the drawing of the diameter of the fixed end 202 ′ toward the center. Yes.
[0070]
In addition, the contact portion 204 ′ is provided with a hole 204 a ′ through which fuel oil flows from the fuel gun 9 inserted.
[0071]
  BookReference exampleIn the fuel filler seal 1, before the fuel gun 9 is inserted into the fuel filler, the initial shape is maintained substantially by the elastic restoring force to return to the initial shape of the membrane member 2 ′.
[0072]
When the fuel gun 9 is inserted, the tip of the fuel gun 9 comes into contact with the contact portion 204 ′, and when further inserted, the contact portion 204 ′ is pushed into the tank side O.
[0073]
At this time, the constricted portion 201 ′ around the abutting portion 204 ′ also follows the abutting portion 204 ′, and the constricted portion 201 ′ is pulled in and sealed so as to hold the outer periphery of the fuel gun 9 by an elastic restoring force.
[0074]
At this time, when the fuel gun 9 is inserted, there is no pushing resistance of the fuel gun 9, so that it can be smoothly inserted.
[0075]
When refueling is completed and the refueling gun 9 is removed, the membrane member 2 'is maintained in its initial shape by the elastic restoring force.
[0076]
  (No.3ofReference exampleFigure 6 is the first3ofReference exampleFig. 6 (a) shows a state before inserting the fuel gun, and Fig. 6 (b) shows a state where the fuel gun is inserted and sealed.
[0077]
In FIG. 6, an oil filler seal 1 is provided with a stretchable tubular membrane member 2 made of a rubber-like elastic material, and is integrally incorporated in a seal housing 3 constituting the oil filler opening. Here, the same components as those of the first embodiment are denoted by the same reference numerals.
[0078]
The cylindrical membrane member 2 is provided with a constricted portion 201 partially reduced in the drum shape, and the inner peripheral diameter of the constricted portion 201 is tightly sealed to the outer periphery of the fuel gun 9 inserted into the fuel filler port. It has become.
[0079]
The constricted portion 201 is formed in a substantially circular arc shape (in the illustrated example, a semicircular shape) reduced in diameter toward the center.
[0080]
The outer end portion on the opening side A that communicates with the outer space of the tubular membrane member 2 is a fixed end portion 202 that is fixed to the seal housing 3 in the axial direction, and communicates with the fuel tank at the back of the fuel filler opening. The inner end of the tank side O is a movable end 203 that is movably attached to the seal housing 3 in the axial direction.
[0081]
The fixed end portion 202 is continuous with one end of the arcuate constricted portion 201. On the other hand, the movable end portion 203 is also continuous with the other end of the constricted portion 201.
[0082]
The seal housing 3 is incorporated in the cylindrical housing body 4 and the inner periphery of the housing body 4, and slides in the axial direction in order to contract the constricted portion 201 of the tubular membrane member 2 in accordance with the insertion of the fuel gun 9. The fixed end 202 of the tubular membrane member 2 is fixed to the housing body 4 and the movable end 203 is fixed to the first sleeve 501 ′ of the slide mechanism 5 ′.
[0083]
The housing body 4 has a cylindrical shape with a flange, and is composed of a cylindrical portion 401 and a fixed flange 402 that is formed to project from the opening side A end portion of the cylindrical portion 401, and the outer end portion on the opening side A of the cylindrical portion 401. The fixed end portion 202 of the tubular membrane member 2 is engaged and fixed to.
[0084]
The fixed end 202 is provided with an annular projection 202a that is engaged with an annular groove 402a provided on the joint surface of the outer end on the opening side A of the fixed flange 402, and the diameter of the fixed end 202 is increased toward the center. Regulating pull-in.
[0085]
The slide mechanism 5 ′ includes a first sleeve 501 ′ to which the movable end 203 is fixed, and a second sleeve 502 ′ having a claw portion 506 ′ that comes into sliding contact with the outer periphery of the inserted fuel gun 9. The first sleeve 501 ′ and the second sleeve 502 ′ are respectively connected to both ends of a lever 505 ′ supported at the center by the support portion 404 of the housing body 4 by the first rod 503 ′ and the second rod 504 ′. .
[0086]
The first sleeve 501 ′ has a stopper portion 501 b ′ for regulating the tank side O, the first rod 503 ′ and the movable end portion 203 of the tubular membrane member 2 are fixed, and the axial direction toward the opening side A It is possible to move to.
[0087]
Since the first sleeve 501 ′ is restricted to the tank side O, the second sleeve 502 ′ is restricted to the opening side A by the lever 505 ′ and can move in the axial direction toward the tank side O. Yes.
[0088]
That is, when one of the first sleeve 501 ′ and the second sleeve 502 ′ moves to the tank side O or the opening side A, the lever 505 ′ moves the other in the direction opposite to the direction in which one moves. In this way, the first sleeve 501 ′ and the second sleeve 502 ′ are connected.
[0089]
An annular protrusion 203a that engages with an annular groove 501a 'formed on the inner periphery of the first sleeve 501' is provided at the movable end 203 of the tubular film member 2.
[0090]
Further, the seal housing 3 is always urged with the first sleeve 501 ′ to which the movable end portion 203 of the tubular membrane member 2 is fixed in the direction of the tank side O of the fuel filler port, and the fuel gun 9 is removed from the fuel filler port. In addition, a spring 8 is provided as a return means for returning the movable end portion 203 from the position moved when the fuel gun 9 is inserted to the initial position.
[0091]
The spring 8 is attached to the annular gap between the first sleeve 501 ′ and the inner peripheral surface of the housing body 4 in a contracted state in the axial direction.
[0092]
Due to the spring biasing force of the spring 8, the stopper portion 501b 'of the first sleeve 501' is brought into contact with the support portion 403 of the lever 505 'provided in the housing body 4 as described above. The position where 501b ′ contacts is the initial position of the first sleeve 501 ′, that is, the initial position of the movable end 203 of the tubular membrane member 2.
[0093]
  BookReference exampleIn the fuel filler seal 1, before the fuel gun 9 is inserted into the fuel filler, the movable end 203 of the tubular membrane member 2 is moved in the direction of the tank side O by the spring 8 via the first sleeve 501 ′. It has an initial shape pushed toward the end, and the seal diameter D, which is the inner diameter of the constricted portion 201, is in an expanded state.
[0094]
When the fueling gun 9 is inserted, the outer periphery of the fueling gun 9 comes into sliding contact with the claw portion 506 ′ of the second sleeve 502 ′, and the second sleeve 502 ′ is drawn into the tank side O in accordance with the insertion of the fueling gun 9, The first sleeve 501 ′ is pushed a predetermined amount S toward the axial opening side A so that the diameter of the constricted portion 201 is reduced through the lever 505 ′, and the outer periphery of the fuel gun 9 and the inner periphery of the constricted portion 201 are in close contact with each other. D is contracted and sealed so as to hold the outer periphery of the fuel gun 9.
[0095]
Even when the diameter of the fuel gun 9 is large, the diameter of the constricted portion 201 of the tubular membrane member 2 is reduced by the insertion of the fuel gun 9, so there is no resistance.
[0096]
When refueling is completed and the refueling gun 9 is removed, the movable end 203 of the tubular membrane member 2 is moved to the first sleeve by the elastic restoring force to return to the initial shape of the tubular membrane member 2 and the spring force of the spring 8. It returns to the initial position via 501 ', and the cylindrical membrane member 2 is maintained in the initial shape.
[0097]
  BookReference exampleThe claw portion 506 ′ of the second sleeve 502 ′ does not need to restrict the insertion amount of the inserted fuel gun 9 and only slides the second sleeve 502 ′ into the tank side O. It can be provided with the bullet lumber it has.
[0098]
【The invention's effect】
According to the present invention, since the outer periphery of the fuel gun is sealed by the constricted portion of the cylindrical membrane member, when the fuel gun is inserted into the fuel filler port for fueling, the outer periphery of the fuel gun is in close contact with the constricted portion of the cylindrical membrane member. In addition, the fuel gun can be sealed so as to wrap, and the fuel gun can be inserted smoothly.
[0099]
In addition, since a deformable tubular membrane member rich in elasticity is used, stress is not concentrated locally but diffused throughout the tubular membrane member, so that durability is improved and the range of adaptation to the diameter of the fuel gun is large. I can take it.
[0100]
The fuel filler seal includes a membrane member made of an elastic material, and the membrane member is configured to follow the contact portion that contacts the tip of the fuel gun and the contact portion being pushed into the back side of the fuel filler port by the fuel gun. With the constricted part that is in close contact with the outer periphery of the gun, the tip of the oil gun comes into contact with the contact part when the oil gun is inserted, and the contact part is pushed into the back of the oil supply port when inserted further, At this time, the constricted portion also follows the abutting portion, and the constricted portion is sealed so that the outer periphery of the fuel gun is held by the elastic restoring force while being deformed and pulled in, so that resistance during insertion of the membrane member can be eliminated.
[Brief description of the drawings]
FIG. 1 (a) is a sectional view of an oil filler seal according to a first embodiment, and FIG. 1 (b) is a half sectional front view of a tubular membrane member of FIG. 1 (a).
FIG. 2A is a cross-sectional view of the first embodiment when the fuel gun is inserted, and FIG. 2B shows a deformed state of the tubular membrane member when the fuel gun is inserted according to the first embodiment. It is a partial expanded sectional view.
FIG. 3 is a schematic configuration diagram of a fuel tank to which the fuel filler seal of the first embodiment is applied.
FIG. 4 (a) shows the first1ofReference exampleSectional view before inserting the fuel gun, (b) is the first1ofReference exampleIt is sectional drawing at the time of no oiling gun insertion.
FIG. 5 (a) shows the first2ofReference exampleSectional view before inserting the fuel gun, (b) is the first2ofReference exampleIt is sectional drawing at the time of no oiling gun insertion.
FIG. 6 (a) shows the first3ofReference exampleSectional view before inserting the fuel gun, (b) is the first3ofReference exampleIt is sectional drawing at the time of no oiling gun insertion.
7A is a cross-sectional view showing an example of a conventional fuel filler seal, and FIG. 7B is a cross-sectional view when the fuel gun is inserted in FIG. 7A.
[Explanation of symbols]
2 Tubular membrane member
201 Constriction of cylindrical membrane member
202 Fixed end of tubular membrane member
203 Movable end of cylindrical membrane member
2 'membrane member
201 'Constriction of membrane member
202 'fixed end of membrane member
204 'contact portion of membrane member
4 Housing body
5 Slide guide
5 'slide mechanism
6 Fixed seal holder on the fixed side
7 Movable side seal presser
8 Spring
9 Refueling gun

Claims (3)

給油口内周に備えられ、該給油口に差し込まれる給油ガンとの隙間を密封する給油口シールであって、
該給油口は、円筒状のハウジング本体と、該ハウジング本体内周に軸方向に摺動自在に組み込まれたスライドガイドから構成されており、
前記給油口シールは弾性材製の筒状膜部材を備え、
該筒状膜部材は、
給油口の開口側の外側端部が前記ハウジング本体に係合されて軸方向に不動に固定される固定端部と、
中心軸に向かって凹状に縮径された断面略円弧形状に成形され、その一端が前記固定端部と連続しているくびれ部と、
半径方向外方に球帯状に膨らんだ湾曲形状を有して前記くびれ部の他端と連続しおり、前記スライドガイドに固定され前記給油ガンが押し込まれる方向に移動可能に設けられた、給油口の奥側の可動端部と、
を備え、
前記くびれ部は、
前記固定端部側に位置し、前記給油ガンの先端に当接する給油口開口側湾曲面部と、
前記給油ガンによって給油口の奥側に押し込まれるのに追従して前記給油ガン外周に接触するガン接触部と、
前記ガン接触部と前記可動端部との間で前記給油ガンによって軸方向に押圧される給油口奥側湾曲面部と、
を備えたことを特徴とする給油口シール。
A fuel filler seal that is provided on the inner periphery of the fuel filler port and seals a gap with a fuel gun inserted into the fuel filler port,
The oil filler port is composed of a cylindrical housing body and a slide guide that is slidably incorporated in the inner periphery of the housing body in the axial direction.
The fuel filler seal includes a cylindrical membrane member made of an elastic material,
The tubular membrane member is
A fixed end portion that is fixed to the housing body in an axially fixed manner by engaging an outer end portion on the opening side of the fuel filler opening;
A constricted portion that is formed into a substantially arc-shaped cross-section that is reduced in diameter toward the central axis, and one end of which is continuous with the fixed end;
An oil filler opening having a curved shape bulging radially outward and continuous with the other end of the constricted portion , fixed to the slide guide and movable in the direction in which the oil gun is pushed. A movable end on the back side,
With
The constricted part is
An oil filler opening side curved surface portion that is located on the fixed end side and abuts against the tip of the fuel gun,
A gun contact portion that contacts the outer periphery of the fuel gun in accordance with being pushed into the back side of the fuel filler port by the fuel gun;
A filler port back side curved surface portion that is pressed in the axial direction by the fuel gun between the gun contact portion and the movable end;
An oil filler seal characterized by comprising:
前記筒状膜部材の前記可動端部は、前記可動端部の内周形状に倣った球帯状の湾曲部を有するシール押えを介して前記スライドガイドに固定されると共に、前記シール押えの前記湾曲部と前記スライドガイドの内周面との間で挟持固定されることを特徴とする請求項1に記載の給油口シール。The movable end portion of the cylindrical film member is fixed to the slide guide via a seal press having a spherical band-like curved portion that follows the inner peripheral shape of the movable end portion, and the curve of the seal press The fuel filler seal according to claim 1, wherein the oil filler seal is sandwiched and fixed between a portion and an inner peripheral surface of the slide guide. 前記筒状膜部材の前記可動端部は、前記スライドガイドの内周側に固定されており、
前記スライドガイドは、その外周側に設けられた付勢手段によって、前記給油口の開口側の方向に付勢されることを特徴とする請求項1又は2に記載の給油口シール。
The movable end of the tubular membrane member is fixed to the inner peripheral side of the slide guide,
3. The fuel filler seal according to claim 1, wherein the slide guide is biased in a direction toward the opening side of the fuel filler by biasing means provided on an outer peripheral side thereof.
JP24780398A 1997-08-21 1998-08-18 Filling port seal Expired - Lifetime JP3882355B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24780398A JP3882355B2 (en) 1997-08-21 1998-08-18 Filling port seal

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP9-240382 1997-08-21
JP24038297 1997-08-21
JP24780398A JP3882355B2 (en) 1997-08-21 1998-08-18 Filling port seal

Publications (2)

Publication Number Publication Date
JPH11129769A JPH11129769A (en) 1999-05-18
JP3882355B2 true JP3882355B2 (en) 2007-02-14

Family

ID=26534706

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
JP (1) JP3882355B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5642595B2 (en) * 2011-03-16 2014-12-17 本田技研工業株式会社 Evaporative fuel processing device for vehicle
JP6426585B2 (en) 2015-11-04 2018-11-21 トヨタ自動車株式会社 Refueling section structure

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