JP3894382B2

JP3894382B2 - Filling port structure

Info

Publication number: JP3894382B2
Application number: JP13446397A
Authority: JP
Inventors: 武鈴木; 寿章市谷; 肇宇土
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 1997-05-09
Filing date: 1997-05-09
Publication date: 2007-03-22
Anticipated expiration: 2017-05-09
Also published as: JPH10309946A

Description

【０００１】
【発明の属する技術分野】
本発明は内燃機関を備えた車輌の燃料タンクに燃料を給油する際に給油ガンの先端が挿入される給油口構造に関する。
【０００２】
【従来の技術】
従来、内燃機関を備えた自動車等の車輌においては、給油の際に給油口から燃料が大気中に蒸散してしまうのを防止するために、給油口にシールリングやリップシール等のシール部材を設け、給油口に挿入される給油ガンのノズルと給油口との隙間をシールするように構成されていた。
【０００３】
【発明が解決しようとする課題】
このように、従来は給油の際に燃料が大気中に蒸散するのを防止するため、給油口にシール部材を設けていたが、これらのシール部材は、給油ガンのノズル外径よりも小径の孔が中央部に設けられたゴム等の弾性部材を給油口に固定して取り付け、該弾性部材の孔に給油ガンのノズルを挿通することにより、給油口とノズルとの隙間をシールするように構成されていたので、一般に外周面が傷だらけでやすり状になっていることが多い給油ガンのノズルをシール部材の孔に挿通するときに、ノズル先端との擦れによりシール部材が損傷したり、給油口の更に奥までノズルを挿入する際に、上記やすり状の給油ガンのノズルの外周面によりシール部材が摩擦されて磨耗したり、また、ノズル引き抜きの際にシール部材が反転して切れが発生する等の原因によって、シール部材のシール性が次第に低下してしまうと云う不都合があった。
【０００４】
このため、給油ガンのノズルと当接すべきカム機構を給油口に設け、シール部材の孔に給油ガンのノズル先端が挿通された後にノズル外周をシール部材によりシールするようにした車輌用の給油口構造が特公平５−８７４０４号公報に開示されている。
【０００５】
しかしながら、上記公知技術は、内部バルブを開弁するために、シール部材によりシールした後給油ガンのノズルを更に給油口の奥まで挿入し、給油終了後、内部バルブが閉弁するまで、給油ガンのノズルをシール部材によりシールしたまま引き抜く必要があったので、該公知技術においてもシール部材のノズル外周面との摩擦による磨耗や反転による切れの発生を防止することが困難であり、したがって、シール部材のシール性がノズルとの干渉によって低下するのを防止できないと云う不都合があった。
【０００６】
本発明は、上記問題点を解決するためになされたもので、給油口構造のシール部材のシール性を長期間に亘って保持させることができる給油口構造を提供することを目的とする。
【０００７】
【課題を解決するための手段】
上記目的を達成するために、請求項１記載の発明は、給油ガン先端が挿入される給油口と、該給油口と前記挿入された給油ガン先端との隙間をシールする弾性のシール部材とを備えた給油口構造において、前記給油口は開口側が奥側より大きい内径を有し、前記シール部材は、前記給油ガン先端が挿通される孔と、前記給油口の内周面と摺接する外周面とを具備すると共に、前記シール部材に取り付けられ前記孔に前記給油ガン先端が挿通された状態で前記給油ガン先端と係合する係合部材と一体的に移動し、且つ前記係合部材に係合した前記給油ガン先端の移動に応じて前記開口側と奥側との間で往復摺動されるように構成され、前記シール部材の孔は、前記シール部材が前記開口側にあるとき内径が前記給油ガン先端の外径よりも大きく且つ前記シール部材が前記奥側にあるとき内径が縮径して内周面が前記給油ガン先端外周面と密着するように構成されることを特徴とする。
【０００８】
このような構成を有する請求項１記載の給油口構造は、給油ガン先端が給油口に挿入されるときにシール部材は給油口開口側に位置し、この状態では、弾性のシール部材の孔の内径はシール部材が給油口奥側にあるときよりも大きいので、給油ガン先端をシール部材の孔に挿通することが容易になり、このため、給油ガン先端挿通時の給油ガン先端との擦れによるシール部材の損傷が防止できる。
【０００９】
シール部材は外周面を給油口内周面と摺接させつつ係合部材と係合した給油ガン先端と共に給油口奥側まで摺動し、該給油口奥側において外周面が給油口の内周面で圧迫されて、孔の内径が縮径され、給油ガン先端と給油口との隙間がシールされる。また、給油を終了して、給油ガン先端を給油口から引き抜く際には、シール部材は給油ガン先端と共に給油口開口側まで摺動し、該開口側において孔が元の内径まで拡径した後、給油ガン先端がシール部材の孔から引き抜かれる。これにより、シール部材の給油ガン先端外周との摩擦による磨耗や反転によるシール部材の切れの発生が防止できる。
【００１１】
また、この構成によって、給油ガン先端挿入開始時、シール部材の孔の内径は給油ガン先端外径よりも大きく、給油ガン先端が容易に挿通できるので、給油ガン先端との擦れによるシール部材の損傷がより確実に防止される。また、シール部材が給油ガン先端と共に給油口の奥側まで移動したときに、シール部材の孔の内周面が給油ガン先端外周面と密着して、給油ガン先端と給油口との隙間がシールされる。
【００１２】
また、請求項２記載の発明は、請求項１記載の給油口構造において、前記給油口と燃料タンクとを連通する通路に該通路を開閉する開閉弁機構が設けられ、該開閉弁機構は、前記給油ガン先端が前記奥側に移動したとき開弁されることを特徴とする。
【００１３】
この構成によって、給油ガン先端と給油口との隙間がシールされた状態でのみ給油口と燃料タンクとが連通するので、給油口からの燃料の蒸散をより確実に防止できる。
【００１４】
また、請求項３記載の発明は、請求項１又は２記載の給油口構造において、前記給油口の内周は、前記シール部材の外周との摩擦を低減するための処理が施されていることを特徴とする。
【００１５】
この構成によって、シール部材の外周面と給油口の内周面との摩擦によるシール部材のシール性の低下を防止できる。
【００１６】
【発明の実施の形態】
以下、図面を参照して、本発明の実施の形態を詳述する。
【００１７】
図１は、本発明の実施の一形態に係る給油口構造の概略構成を示す縦断面図である。
【００１８】
同図において、給油口１は車体構造体２０に固定されている。該給油口１は図示しない燃料タンクに連通するフィラーパイプ２が一体に形成され、該フィラーパイプ２と給油口１とは仕切壁３により仕切られている。仕切壁３の中央部には、孔３ａが穿設されており、給油口１とフィラーパイプ２とは孔３ａを介して連通している。
【００１９】
仕切壁３の孔３ａは開閉弁４によって開閉される。フィラーパイプ２内周には環状溝５が設けられており、該環状溝５にはワッシャ６が嵌め込まれている。開閉弁４とワッシャ６との間には、スプリング７が装着されており、該スプリング７によって開閉弁４は閉弁方向に付勢されている。
【００２０】
給油口１は、開口側の大径部１ａと、該大径部１ａよりも内径が小さい奥側の小径部１ｂと、大径部１ａと小径部１ｂとを接続するテーパ部１ｃとから構成されている。給油口１の大径部１ａには、給油時、給油口１に挿入される給油ガンのノズル（図４〜図６参照、該ノズルが特許請求の範囲に記載した給油ガン先端に相当する）と給油口１内周との隙間をシールするための例えば合成ゴム等の弾性体から成るシール部材９が配されている。シール部材９には給油ガンのノズルと係合する係合部材１０が、両端に頭部を有する８個のピン１１によって取り付けられている。
【００２１】
図２はシール部材９を給油口１の開口側から見た平面図である。同図に示すように、シール部材９は中央部に給油ガンのノズルが挿通されるノズル挿通孔９ａが設けられたドーナツ形状を有する。シール部材９は、給油口１の内周面と摺接する外周面９ｃを有し、ピン１１の２つの頭部の一方が埋め込まれるピン頭収納孔９ｂが８個周方向に等間隔に配列して設けられている。
【００２２】
図１に戻り、係合部材１０は、給油ガンのノズルが挿通されるボス部１０ａと、該ボス部１０ａの一端に設けられ上記ピン１１の他方の頭部と係合するフランジ部１０ｂと、ボス部１０ａの他端に設けられ給油ガンのノズルと係合する縮径された係合部１０ｃとから構成されている。給油ガンのノズルは、シール部材９のノズル挿通孔９ａ及び係合部材１０のボス部１０ａに挿通された状態で係合部１０ｃと係合する。
【００２３】
係合部材１０と仕切壁３との間には、一端が係合部材１０のフランジ部１０ｂと当接し他端が仕切壁３と当接するスプリング１２が装着されており、このスプリング１２の弾性力によって、シール部材９は、給油ガンのノズルが給油口１に挿入されていない通常時、大径部１ａ内に保持される。給油ガンのノズルが給油口１に挿入されたときには、給油ガンのノズルが給油口１奥側まで挿入されるのに伴ってシール部材９はスプリング１２の弾性力に抗して外周面９ｃを給油口１の内周面と摺接させつつ給油口１奥側の小径部１ｂまで移動する。
【００２４】
また、給油口１内周面には、シール部材９の外周面９ｃとの摩擦を低減するために、テフロン（登録商標）処理等の表面が滑らかになる加工が施されている。このように、シール部材９の外周面９ｃとの摩擦を低減するための処理を給油口１内周面に施すことにより、シール部材９の磨耗を防止して、シール部材９のシール性をより長期間に亘って保持させることができる。
【００２５】
シール部材９のノズル挿通孔９ａは、シール部材９が給油口１の大径部１ａ内に位置するとき内径が給油ガンのノズル先端外径よりも若干大きく且つシール部材９が小径部１ｂ内に移動したときシール部材９の外周面９ｃが小径部１ｂの内周面で圧迫されてノズル挿通孔９ａが縮径し、該ノズル挿通孔９ａの内周面がノズル外周面と密着して、ノズル先端外周をシールするように、内径寸法が設定されている。
【００２６】
次に、図３を参照して、開閉弁４の詳細を説明する。図３は、開閉弁４の概略構成を示す構造図である。同図（ａ）は開閉弁４の平面図であり、同図（ｂ）は開閉弁４を側方から見た一部断面図である。
【００２７】
開閉弁４は、例えば合成ゴム等の弾性体から成る略半球形状の弁体４ａとプラスチック等の高分子化合物から成る頭部４ｂとから構成されている。弁体４ａには頂部上端に開口する係合孔４０が設けられ、該係合孔に頭部４ｂの下部に設けられた大径部５０が埋設されることにより、弁体４ａと頭部４ｂとは一体化されている。開閉弁４の頭部４ｂの上部は横断面が十字型の略逆錐体形状を有し、給油ガンのノズルが給油口１の奥側まで挿入されたとき、係合部材１０の係合部１０ｃが開閉弁４の頭部４ｂの上端面と当接して、開閉弁４が開弁されるように構成されている。
【００２８】
次に、図４〜図６を参照して、上述のように構成された本発明の実施の一形態に係る給油口構造の作用を説明する。
【００２９】
図４は、給油ガンのノズル３０を給油口１に挿入したときの初期状態を示す図である。この状態では、シール部材９は給油口１開口側の大径部１ａに位置し、ノズル３０は先端が、シール部材９のノズル挿通孔９ａ及び係合部材１０のボス部１０ａに挿通され、係合部材１０の係合部１０ｃと係合している。
【００３０】
この状態では、シール部材９のノズル挿通孔９ａの内径はノズル３０の外径よりも若干大きく、このため、ノズル３０のノズル挿通孔９ａへの挿通時のシール部材９のノズル３０先端との擦れによる損傷を防止できる。
【００３１】
図５は、係合部材１０の係合部１０ｃが開閉弁４の頭部４ｂの上端面と当接する位置まで給油ガンのノズル３０先端が給油口１内部に挿入された状態を示す図である。この状態では、シール部材９は外周面９ｃを給油口１内周面と摺接させつつ給油口１奥側の小径部１ｂ上部まで摺動し、該小径部１ｂ上部において外周面９ｃが小径部１ｂの内周面で圧迫されて、ノズル挿通孔９ａが縮径し、これにより、ノズル挿通孔９ａ内周がノズル３０外周と密着して、ノズル３０外周がシールされた状態になっている。
【００３２】
図６は、ノズル３０が更に給油口１奥側まで挿入されて、給油が開始されるときの様子を示す図である。この状態では、図５の小径部１ｂ上部においてノズル３０をシールしたシール部材９が係合部材１０と係合したノズル３０の移動に伴って更に小径部１ｂの下部まで移動すると共に、開閉弁４は、頭部４ｂの上端面に当接した係合部材１０の係合部１０ｃにより押下され、開弁した状態になっている。このとき、ノズル３０先端から放出される燃料は、横断面が十字型の開閉弁４の頭部４ｂと仕切壁３の孔３ａとの隙間を通ってフィラーパイプ２に流入する。
【００３３】
このように、シール部材９はノズル３０をシールした後も外周面９ｃを給油口１内周面に摺接させつつノズル３０と共に小径部１ｂ内を摺動するので、弁体４を開弁するためにノズル３０を更に給油口１の奥まで挿入するときにも、ノズル３０外周によって摩擦されることがなく、したがってノズル３０との摩擦によるシール部材９の磨耗を防止できる。
【００３４】
また、給油を終了して、ノズル３０を給油口１から引き抜く際には、シール部材９はノズル３０先端の給油口１開口側への移動に応じて図４の給油口１開口側の大径部１ａまで摺動し、該大径部１ａにおいてノズル挿通孔９ａの内径が拡径して、ノズル３０のシール状態が解除される。ノズル３０はこの状態でノズル挿通孔９ａから引き抜かれるので、該引き抜きの際の反転によるシール部材９の切れが防止できる。
【００３５】
尚、給油口１は、大径部１ａと小径部１ｂとの区別をなくして、全体をテーパ状としてもよい。開閉弁４の構成は図示例に限られるものではなく、また、シール部材９と係合部材１０とを一体に形成するのもよい。
【００３６】
【発明の効果】
請求項１記載の給油口構造によれば、給油ガン先端をシール部材の孔に挿通するときには、該孔の内径が大きいので、給油ガン先端のシール部材の孔への挿通が容易になり、このため給油ガン先端挿通時に給油ガン先端との擦れによりシール部材が損傷するのを防止できる。また、給油ガン先端が給油口奥側に挿入されるのに伴ってシール部材は給油ガン先端と共に給油口奥側まで移動し、シール部材が給油口奥側まで移動したときに給油ガン先端と給油口との隙間がシールされるので、シール部材の給油ガン先端外周面との摩擦による磨耗が防止される。また、給油を終了して、給油ガン先端を給油口から引き抜く際には、給油ガン先端のシール状態が解除されてから給油ガン先端がシール部材の孔から引き抜かれるので、反転によるシール部材の切れが防止できる。
【００３７】
このように、請求項１記載の給油口構造によれば、シール部材の給油ガン先端との干渉による損傷、磨耗、及び切れの発生を防止することにより、シール部材のシール性を長期間に亘って保持させることができる。
【００３８】
また、請求項１記載の給油口構造によれば、シール部材は、係合部材に係合した給油ガン先端の移動に応じて開口側と奥側との間で往復摺動されるように構成され、シール部材の孔は、シール部材が開口側にあるとき内径が給油ガン先端の外径よりも大きく且つシール部材が奥側にあるとき内径が縮径して内周面が給油ガン先端外周面と密着する。したがって、シール部材は、給油ガン先端をシールした後も外周面を給油口内周面に摺接させつつ給油ガン先端と共に奥側を摺動するので、給油ガン先端を更に給油口の奥まで挿入するときにも、給油ガン先端外周によって摩擦されることがなく、したがって給油ガン先端との摩擦によるシール部材の磨耗を確実に防止できる。
【００３９】
また、請求項２記載の給油口構造によれば、給油口と給油ガン先端との隙間がシール部材によりシールされた状態で給油口と燃料タンクとを連通する通路が開通するので、給油の際の給油口からの燃料の蒸散がより確実に防止できる。
【００４０】
また、請求項３記載の給油口構造によれば、給油口の内周面に、シール部材の外周面との摩擦を低減するための処理が施されているので、シール部材外周の給油口内周との摩擦が低減され、シール部材のシール性をより長期に亘って保持させることができる。
【図面の簡単な説明】
【図１】本発明の実施の一形態に係る給油口構造の概略構成を示す縦断面図である。
【図２】シール部材の平面図である。
【図３】開閉弁の詳細を示す構造図である。
【図４】給油口に給油ガンのノズルを挿入したときの各状態を示す説明図である。
【図５】給油口に給油ガンのノズルを挿入したときの各状態を示す説明図である。
【図６】給油口に給油ガンのノズルを挿入したときの各状態を示す説明図である。
【符号の説明】
１給油口
２フィラーパイプ（通路）
３仕切壁
４開閉弁（開閉弁機構）
９シール部材
１０係合部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuel filler structure into which a tip of a fuel gun is inserted when fuel is supplied to a fuel tank of a vehicle equipped with an internal combustion engine.
[0002]
[Prior art]
Conventionally, in a vehicle such as an automobile equipped with an internal combustion engine, a seal member such as a seal ring or a lip seal is provided on the fuel filler port in order to prevent fuel from evaporating from the fuel filler port into the atmosphere during fueling. It was provided and configured to seal the gap between the nozzle of the fueling gun inserted into the fueling port and the fueling port.
[0003]
[Problems to be solved by the invention]
Thus, in the past, in order to prevent the fuel from evaporating into the atmosphere during refueling, a seal member is provided at the refueling port, but these seal members are smaller in diameter than the nozzle outer diameter of the refueling gun. A rubber or other elastic member with a hole in the center is fixed and attached to the oil filler port, and the nozzle of the oil gun is inserted into the hole of the elastic member to seal the gap between the oil filler port and the nozzle. Because it was configured, when inserting the nozzle of the oiling gun, which generally has a flawed outer peripheral surface, into the hole of the seal member, the seal member may be damaged by rubbing with the nozzle tip, When inserting the nozzle further into the oil filler port, the seal member is rubbed and worn by the outer peripheral surface of the nozzle of the above-mentioned file-like oil gun, or the seal member is inverted and broken when the nozzle is pulled out. appear Depending on the cause of, the sealing property of the sealing member is a disadvantage that say decreases gradually.
[0004]
For this reason, the oil supply for vehicles is provided with a cam mechanism to be brought into contact with the nozzle of the fuel gun, and the outer periphery of the nozzle is sealed by the seal member after the tip of the nozzle of the fuel gun is inserted into the hole of the seal member. The mouth structure is disclosed in Japanese Patent Publication No. 5-87404.
[0005]
However, in the above known technique, in order to open the internal valve, the nozzle of the refueling gun is further inserted into the refueling port after sealing with a sealing member, and after refueling, the refueling gun is closed until the internal valve is closed. Therefore, it is difficult to prevent wear due to friction with the nozzle outer peripheral surface of the seal member and occurrence of breakage due to inversion in the known technique. There is an inconvenience that the sealability of the member cannot be prevented from being deteriorated due to interference with the nozzle.
[0006]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an oil filler structure that can maintain the sealing performance of the seal member of the fuel filler structure over a long period of time.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 is provided with an oil filler port into which a tip of a fuel gun is inserted, and an elastic seal member that seals a gap between the oil filler port and the tip of the inserted fuel gun. periphery in fuel filler opening structure comprising, the fuel supply port has an inner diameter opening side is larger than the back side, wherein the seal member is in which the hole through which the fuel gun tip is inserted, contact before SL and the inner peripheral surface of the fuel supply port sliding And is moved integrally with an engagement member that engages with the oil gun tip while being attached to the seal member and is inserted into the hole. It is configured to reciprocate between the opening side and the back side according to the movement of the tip of the engaged oil gun, and the hole of the seal member has an inner diameter when the seal member is on the opening side. Is larger than the outer diameter of the oil gun tip One the inner circumferential surface inside diameter is reduced in diameter when the seal member is in said inner side and said Rukoto configured so as to be in close contact with the fuel gun tip outer peripheral surface.
[0008]
In the fuel filler structure according to claim 1, having such a configuration, when the tip of the fuel gun is inserted into the fuel filler, the seal member is positioned on the fuel filler opening side. In this state, the hole of the elastic seal member is Since the inner diameter is larger than when the seal member is on the back side of the fuel filler port, it becomes easy to insert the tip of the fuel gun into the hole of the seal member, and this is caused by friction with the tip of the fuel gun when the tip of the fuel gun is inserted. Damage to the seal member can be prevented.
[0009]
The seal member slides to the back side of the oil supply port together with the tip of the oil gun engaged with the engaging member while the outer peripheral surface is in sliding contact with the internal surface of the oil supply port, and the outer peripheral surface is the inner peripheral surface of the oil supply port at the back side of the oil supply port. , The inner diameter of the hole is reduced, and the gap between the oil gun tip and the oil filler port is sealed. When the oil supply is finished and the tip of the oil gun is pulled out from the oil supply port, the seal member slides to the oil supply port opening side together with the oil gun tip, and after the hole is expanded to the original inner diameter on the opening side. The tip of the refueling gun is pulled out from the hole of the seal member. Thereby, it is possible to prevent the seal member from being worn due to friction with the outer periphery of the tip of the oil supply gun or from being cut off due to inversion.
[0011]
Also, with this configuration, when inserting the tip of the oil gun, the inner diameter of the hole of the seal member is larger than the outer diameter of the oil gun tip, and the tip of the oil gun can be easily inserted. Is more reliably prevented. Also, when the seal member moves with the oil gun tip to the back of the oil filler port, the inner peripheral surface of the hole of the seal member is in close contact with the outer peripheral surface of the oil gun tip, and the gap between the oil gun tip and the oil filler port is sealed. Is done.
[0012]
Further, an invention according to claim 2, wherein, in the fuel filler opening structure of claim 1 Symbol placement, the on-off valve mechanism for opening and closing the passage is provided an oil supply port and the fuel tank passage communicating, the on-off valve mechanism The valve is opened when the tip of the refueling gun moves to the back side.
[0013]
With this configuration, the fuel supply port and the fuel tank communicate with each other only when the gap between the tip of the fuel supply gun and the fuel supply port is sealed, so that it is possible to more reliably prevent the fuel from evaporating from the fuel supply port.
[0014]
Further, an invention according to claim 3, wherein, in the sheet oil outlet structure according to claim 1 or 2, wherein the inner periphery of the fuel supply port, the process for reducing friction between the outer periphery of said seal member is applied It is characterized by that.
[0015]
With this configuration, it is possible to prevent deterioration of the sealing performance of the sealing member due to friction between the outer peripheral surface of the sealing member and the inner peripheral surface of the fuel filler port.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0017]
FIG. 1 is a longitudinal sectional view showing a schematic configuration of a fuel filler structure according to an embodiment of the present invention.
[0018]
In the figure, the fuel filler 1 is fixed to a vehicle body structure 20. The filler port 1 is integrally formed with a filler pipe 2 communicating with a fuel tank (not shown). The filler pipe 2 and the filler port 1 are partitioned by a partition wall 3. A hole 3a is formed in the center of the partition wall 3, and the oil filler port 1 and the filler pipe 2 communicate with each other through the hole 3a.
[0019]
The hole 3 a of the partition wall 3 is opened and closed by an on-off valve 4. An annular groove 5 is provided on the inner periphery of the filler pipe 2, and a washer 6 is fitted in the annular groove 5. A spring 7 is mounted between the opening / closing valve 4 and the washer 6, and the opening / closing valve 4 is urged by the spring 7 in the valve closing direction.
[0020]
The oil filler port 1 includes a large-diameter portion 1a on the opening side, a small-diameter portion 1b having a smaller inner diameter than the large-diameter portion 1a, and a tapered portion 1c that connects the large-diameter portion 1a and the small-diameter portion 1b. Has been. The large-diameter portion 1a of the fuel filler port 1 is provided with a nozzle of a fuel gun that is inserted into the fuel filler port 1 at the time of fueling (see FIGS. 4 to 6, the nozzle corresponds to the tip of the fuel gun described in the claims). A sealing member 9 made of an elastic material such as synthetic rubber is provided for sealing a gap between the oil supply port 1 and the inner periphery of the fuel filler opening 1. An engaging member 10 that engages with the nozzle of the fuel gun is attached to the seal member 9 by eight pins 11 having heads at both ends.
[0021]
FIG. 2 is a plan view of the seal member 9 as viewed from the opening side of the fuel filler opening 1. As shown in the figure, the seal member 9 has a donut shape provided with a nozzle insertion hole 9a through which the nozzle of the fuel gun is inserted at the center. The seal member 9 has an outer peripheral surface 9c slidably in contact with the inner peripheral surface of the fuel filler opening 1, and eight pin head accommodation holes 9b in which one of the two heads of the pin 11 is embedded are arranged at equal intervals in the circumferential direction. Is provided.
[0022]
Returning to FIG. 1, the engaging member 10 includes a boss portion 10 a through which the nozzle of the fuel gun is inserted, a flange portion 10 b provided at one end of the boss portion 10 a and engaged with the other head portion of the pin 11, It is comprised from the engaging part 10c by which the diameter was reduced provided in the other end of the boss | hub part 10a and engaged with the nozzle of an oil supply gun. The nozzle of the fuel gun is engaged with the engaging portion 10 c in a state where the nozzle is inserted through the nozzle insertion hole 9 a of the seal member 9 and the boss portion 10 a of the engaging member 10.
[0023]
Between the engagement member 10 and the partition wall 3, a spring 12 having one end in contact with the flange portion 10 b of the engagement member 10 and the other end in contact with the partition wall 3 is mounted. Thus, the seal member 9 is held in the large-diameter portion 1a at the normal time when the nozzle of the fueling gun is not inserted into the fueling port 1. When the nozzle of the fueling gun is inserted into the fueling port 1, the seal member 9 lubricates the outer peripheral surface 9 c against the elastic force of the spring 12 as the nozzle of the fueling gun is inserted to the back of the fueling port 1. It moves to the small-diameter portion 1b on the back side of the fuel filler port 1 while making sliding contact with the inner peripheral surface of the port 1.
[0024]
Moreover, in order to reduce friction with the outer peripheral surface 9c of the sealing member 9, the inner surface of the fuel filler 1 is subjected to a process such as a Teflon (registered trademark) treatment to make the surface smooth. In this way, by applying the treatment for reducing the friction with the outer peripheral surface 9c of the seal member 9 to the inner peripheral surface of the fuel filler port 1, the seal member 9 is prevented from being worn, and the sealing performance of the seal member 9 is further improved. It can be held for a long time.
[0025]
The nozzle insertion hole 9a of the seal member 9 has an inner diameter slightly larger than the outer diameter of the nozzle tip of the fuel gun when the seal member 9 is positioned in the large diameter portion 1a of the fuel filler port 1 and the seal member 9 is in the small diameter portion 1b. When moved, the outer peripheral surface 9c of the seal member 9 is compressed by the inner peripheral surface of the small-diameter portion 1b, the nozzle insertion hole 9a is reduced in diameter, and the inner peripheral surface of the nozzle insertion hole 9a is in close contact with the nozzle outer peripheral surface. The inner diameter dimension is set so as to seal the outer periphery of the tip.
[0026]
Next, the details of the on-off valve 4 will be described with reference to FIG. FIG. 3 is a structural diagram showing a schematic configuration of the on-off valve 4. FIG. 4A is a plan view of the on-off valve 4, and FIG. 3B is a partial cross-sectional view of the on-off valve 4 as viewed from the side.
[0027]
The on-off valve 4 includes a substantially hemispherical valve body 4a made of an elastic material such as synthetic rubber and a head 4b made of a polymer compound such as plastic. The valve body 4a is provided with an engagement hole 40 opened at the top upper end, and the large diameter part 50 provided under the head 4b is embedded in the engagement hole, whereby the valve body 4a and the head 4b. Is integrated. The upper part of the head 4b of the on-off valve 4 has a substantially inverted conical shape with a cross-shaped cross section, and when the nozzle of the fueling gun is inserted to the back side of the fueling port 1, the engaging part of the engaging member 10 10 c contacts with the upper end surface of the head 4 b of the on-off valve 4 so that the on-off valve 4 is opened.
[0028]
Next, with reference to FIGS. 4-6, the effect | action of the fuel filler structure which concerns on one Embodiment of this invention comprised as mentioned above is demonstrated.
[0029]
FIG. 4 is a diagram illustrating an initial state when the nozzle 30 of the fueling gun is inserted into the fueling port 1. In this state, the seal member 9 is positioned at the large-diameter portion 1a on the opening side of the fuel filler opening 1, and the tip of the nozzle 30 is inserted through the nozzle insertion hole 9a of the seal member 9 and the boss portion 10a of the engagement member 10, The engaging part 10 is engaged with the engaging part 10 c.
[0030]
In this state, the inner diameter of the nozzle insertion hole 9a of the seal member 9 is slightly larger than the outer diameter of the nozzle 30. For this reason, when the nozzle 30 is inserted into the nozzle insertion hole 9a, the seal member 9 rubs against the tip of the nozzle 30. Can prevent damage.
[0031]
FIG. 5 is a view showing a state in which the tip of the nozzle 30 of the fuel gun is inserted into the fuel filler port 1 until the engaging portion 10c of the engaging member 10 contacts the upper end surface of the head 4b of the on-off valve 4. . In this state, the seal member 9 slides up to the upper portion of the small-diameter portion 1b on the back side of the oil supply port 1 with the outer peripheral surface 9c slidingly contacting the inner peripheral surface of the oil supply port 1, and the outer peripheral surface 9c is a small-diameter portion at the upper portion of the small-diameter portion 1b. The nozzle insertion hole 9a is reduced in diameter by being compressed by the inner peripheral surface 1b, whereby the inner periphery of the nozzle insertion hole 9a is in close contact with the outer periphery of the nozzle 30 and the outer periphery of the nozzle 30 is sealed.
[0032]
FIG. 6 is a diagram illustrating a state when the nozzle 30 is further inserted to the back side of the fuel filler opening 1 and fueling is started. In this state, the seal member 9 that seals the nozzle 30 in the upper portion of the small diameter portion 1b in FIG. 5 moves further to the lower portion of the small diameter portion 1b as the nozzle 30 engaged with the engagement member 10 moves, and the on-off valve 4 Is pressed by the engaging portion 10c of the engaging member 10 in contact with the upper end surface of the head 4b and is in a valve open state. At this time, the fuel discharged from the tip of the nozzle 30 flows into the filler pipe 2 through a gap between the head 4b of the cross-shaped on-off valve 4 having a cross-section and the hole 3a of the partition wall 3.
[0033]
Thus, since the seal member 9 slides in the small diameter portion 1b together with the nozzle 30 while sliding the outer peripheral surface 9c on the inner peripheral surface of the fuel filler opening 1 after sealing the nozzle 30, the valve element 4 is opened. Therefore, even when the nozzle 30 is further inserted into the oil filler port 1, it is not rubbed by the outer periphery of the nozzle 30, and therefore the wear of the seal member 9 due to friction with the nozzle 30 can be prevented.
[0034]
Further, when the refueling is finished and the nozzle 30 is pulled out from the refueling port 1, the sealing member 9 has a large diameter on the opening side of the refueling port 1 in FIG. 4 according to the movement of the tip of the nozzle 30 to the refueling port 1 opening side. It slides to the part 1a, the internal diameter of the nozzle insertion hole 9a is expanded in the large diameter part 1a, and the sealing state of the nozzle 30 is released. Since the nozzle 30 is pulled out from the nozzle insertion hole 9a in this state, it is possible to prevent the sealing member 9 from being cut off due to inversion during the pulling out.
[0035]
The oil filler port 1 may be entirely tapered without distinguishing between the large diameter portion 1a and the small diameter portion 1b. The configuration of the on-off valve 4 is not limited to the illustrated example, and the seal member 9 and the engagement member 10 may be integrally formed.
[0036]
【The invention's effect】
According to the fuel filler structure of claim 1, when the tip of the oil gun is inserted into the hole of the seal member, the inner diameter of the hole is large, so that the oil gun can be easily inserted into the hole of the seal member. Therefore, it is possible to prevent the seal member from being damaged due to rubbing with the tip of the fuel gun when the tip of the fuel gun is inserted. Also, as the tip of the fuel gun is inserted into the back side of the fuel filler port, the seal member moves to the back side of the fuel filler port together with the tip of the fuel gun, and when the seal member moves to the back side of the fuel filler port, Since the gap with the mouth is sealed, wear due to friction with the outer peripheral surface of the oil gun tip of the seal member is prevented. Also, when oiling is finished and the oil gun tip is pulled out of the oil filler port, the oil gun tip is withdrawn from the hole of the seal member after the oil gun tip seal is released. Can be prevented.
[0037]
As described above, according to the fuel filler structure of claim 1, the seal member can be maintained over a long period of time by preventing damage, wear, and breakage due to interference with the tip of the fuel gun of the seal member. Can be held.
[0038]
According to the fuel filler structure of claim 1 , the seal member is configured to reciprocate between the opening side and the back side in accordance with the movement of the tip of the fuel gun engaged with the engaging member. When the seal member is on the opening side, the inner diameter of the hole of the seal member is larger than the outer diameter of the oil gun tip, and when the seal member is on the inner side, the inner diameter is reduced and the inner peripheral surface is the outer periphery of the oil gun tip. Close contact with the surface. Therefore, the seal member slides on the back side together with the end of the oil gun while sliding the outer peripheral surface against the inner peripheral surface of the oil port even after sealing the end of the oil gun, so that the end of the oil gun is further inserted to the back of the oil port. Sometimes, it is not rubbed by the outer periphery of the tip of the fuel gun, and therefore, wear of the seal member due to friction with the tip of the fuel gun can be reliably prevented.
[0039]
Further, according to the fuel supply port structure of claim 2, the passage that connects the fuel supply port and the fuel tank is opened with the gap between the fuel supply port and the tip of the fuel gun sealed by the seal member. The transpiration of fuel from the fuel filler port can be prevented more reliably.
[0040]
Further, according to the fuel filler structure according to claim 3 , the inner peripheral surface of the fuel filler port is subjected to a process for reducing friction with the outer peripheral surface of the seal member. And the sealing performance of the sealing member can be maintained for a longer period of time.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a schematic configuration of a fuel filler structure according to an embodiment of the present invention.
FIG. 2 is a plan view of a seal member.
FIG. 3 is a structural diagram showing details of an on-off valve.
FIG. 4 is an explanatory diagram showing each state when a nozzle of a fuel gun is inserted into a fuel filler port.
FIG. 5 is an explanatory diagram showing each state when a nozzle of a fuel gun is inserted into a fuel filler port.
FIG. 6 is an explanatory diagram showing each state when a nozzle of a fueling gun is inserted into a fueling port.
[Explanation of symbols]
1 Refueling port 2 Filler pipe (passage)
3 Partition 4 Open / close valve (open / close valve mechanism)
9 Seal member 10 Engagement member

Claims

In a fuel filler structure comprising a fuel filler port into which a fuel gun tip is inserted, and an elastic seal member that seals a gap between the fuel filler tip and the inserted fuel gun tip ,
The fuel filler opening has an inner diameter that is larger on the opening side than the back side ,
The sealing member has a hole through which the fuel gun tip is inserted, as well as and a pre Symbol inner peripheral surface in sliding contact the outer peripheral surface of the fuel supply port, the oil supply gun tip inserted into the hole attached to the sealing member between by the fueling gun tip and integrally moves with the engaging member engaged with the state, and the back side to the opening side in accordance with the movement of the fueling gun tip engaged with the engaging member in is configured to be reciprocated,
When the seal member is on the opening side, the inner diameter of the hole of the seal member is larger than the outer diameter of the tip of the fuel gun, and when the seal member is on the inner side, the inner diameter is reduced and the inner peripheral surface is fuel filler opening structure, wherein Rukoto configured so as to be in close contact with the fuel gun tip outer peripheral surface.

An opening / closing valve mechanism for opening and closing the passage is provided in a passage communicating the fuel filler port and the fuel tank, and the opening / closing valve mechanism is opened when the tip of the fuel gun moves to the back side. fuel filler opening structure of claim 1 Symbol mounting to.

The oil supply port structure according to claim 1 or 2, wherein the inner peripheral surface of the oil supply port is subjected to a treatment for reducing friction with the outer peripheral surface of the seal member.