JPH1178549A - Fuel back-flow preventing valve - Google Patents
Fuel back-flow preventing valveInfo
- Publication number
- JPH1178549A JPH1178549A JP19827398A JP19827398A JPH1178549A JP H1178549 A JPH1178549 A JP H1178549A JP 19827398 A JP19827398 A JP 19827398A JP 19827398 A JP19827398 A JP 19827398A JP H1178549 A JPH1178549 A JP H1178549A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- connection port
- valve
- valve element
- slide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Check Valves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車の燃料タン
クと該燃料タンクに連結される燃料供給管との連結口部
に介装されて、燃料タンク内の燃料が燃料供給管側へ逆
流することを防止する燃料逆流防止バルブの改良に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel tank of a motor vehicle and a fuel supply pipe connected to the fuel tank. The present invention relates to an improvement of a fuel backflow prevention valve for preventing such a situation.
【０００２】[0002]
【従来の技術】従来のこの種燃料逆流防止バルブとし
て、例えば、実公平３−５４０３１号公報に示すものが
存する。該従来の燃料逆流防止バルブは、具体的には図
示しないが、上記燃料供給管の燃料タンク内に臨む連結
口部側に単一又は複数の弁板を揺動可能に介装して、給
油時には、供給燃料の流圧で、上記単一又は複数の弁板
で燃料供給管の連結口部を開放して、燃料タンク内に対
する燃料の流入を許容し、給油後は、単一又は複数の弁
板で燃料供給管の連結口部を閉塞して、燃料の燃料供給
管側への逆流を防止する構成となっている。2. Description of the Related Art As a conventional fuel backflow prevention valve of this type, for example, there is one disclosed in Japanese Utility Model Publication No. 3-54031. Although not specifically shown, the conventional fuel backflow prevention valve includes a single or a plurality of valve plates swingably interposed at a connection port side of the fuel supply pipe facing the fuel tank to refuel. At times, with the flow pressure of the supplied fuel, the connection port of the fuel supply pipe is opened with the single or multiple valve plates to allow the fuel to flow into the fuel tank. The connection opening of the fuel supply pipe is closed by a valve plate to prevent fuel from flowing back to the fuel supply pipe.
【０００３】[0003]
【発明が解決しようとする課題】然し乍ら、従来の燃料
逆流防止バルブは、弁板の使用枚数は兎も角として、基
本的には、単純に、燃料供給管の連結口部側に揺動可能
に介装された弁板で、当該連結口部を開閉するだけのも
のであるから、燃料供給管の連結口部の閉塞状態にあっ
ては、そのシール性が高いとは決して言えないので、例
えば、衝突事故等に起因して、燃料供給管が折損・破損
したような場合には、そのシール性の欠如が禍して、燃
料タンク内の燃料が燃料供給管側に逆流してしまう恐れ
を十分に有していた。尚、複数の弁板を使用する場合に
は、ばね部材を併用して、各弁板の閉塞状態を強制的に
確保しようとする工夫は一応施されてはいるが、これだ
けでは、各弁板間のシール性を向上することは不可能で
あった。However, in the conventional fuel check valve, the number of valve plates to be used is basically square, and basically, the valve can simply swing toward the connection port side of the fuel supply pipe. Since the valve plate interposed only opens and closes the connection port, since the connection port of the fuel supply pipe is in a closed state, it cannot be said that the sealing performance is high. For example, if the fuel supply pipe breaks or breaks due to a collision accident or the like, the fuel in the fuel tank may flow back to the fuel supply pipe due to the lack of sealing performance. Had enough. In the case where a plurality of valve plates are used, some efforts have been made to forcibly secure the closed state of each valve plate by using a spring member together. It was impossible to improve the sealing property between them.
【０００４】[0004]
【課題を解決するための手段】本発明は、斯る従来の燃
料逆流防止バルブが抱える課題を有効に解決するために
開発されたもので、請求項１記載の発明は、燃料タンク
と燃料供給管との連結口部に介装される燃料逆流防止バ
ルブであって、上記連結口部を開閉するスライド式の弁
体を備え、該弁体に連結口部の上流側に向かって伸長し
て当該上流側の内壁面に摺接する複数のガイド突起を設
ける構成を採用した。SUMMARY OF THE INVENTION The present invention has been developed to effectively solve the problems of the conventional fuel check valve, and the invention according to claim 1 is directed to a fuel tank and a fuel supply valve. A fuel backflow prevention valve interposed at a connection port with a pipe, comprising a sliding valve element for opening and closing the connection port, wherein the valve element extends toward the upstream side of the connection port. A configuration is employed in which a plurality of guide protrusions are provided to be in sliding contact with the inner wall surface on the upstream side.
【０００５】請求項２記載の発明は、請求項１を前提と
して、弁体に連結口部の下流側に向かって伸長する軸部
を設けて、当該軸部をスライド可能に支持する構成を採
用した。[0005] The second aspect of the invention is based on the first aspect, and adopts a configuration in which a shaft portion extending toward the downstream side of the connection port portion is provided on the valve body and the shaft portion is slidably supported. did.
【０００６】請求項３記載の発明は、請求項１乃至請求
項２を前提として、円錐形状を呈する弁体の外周部に供
給燃料の流動方向を規制する肩部を形成すると共に、同
弁体の下流側に連結口部の口縁に当接するフランジ部を
設けて、当該フランジ部よりも大径な弾性シール部をフ
ランジ部の後方から連結口部の口縁に密着させる構成を
採用した。According to a third aspect of the present invention, based on the first and second aspects, a shoulder for regulating the flow direction of the supplied fuel is formed on an outer peripheral portion of the conical valve body, and the valve body is provided with the same. A flange is provided on the downstream side of the connection port so as to be in contact with the edge of the connection port, and an elastic seal having a diameter larger than that of the flange is adhered to the edge of the connection port from behind the flange.
【０００７】請求項４記載の発明は、燃料タンクと燃料
供給管との連結口部に介装される燃料逆流防止バルブで
あって、上記連結口部を開閉するスライド式の弁体を備
え、該弁体は、連結口部の上流側に向かって伸長して当
該上流側の内壁面に摺接する複数のガイド突起を設けた
スライド部材と、上記連結口部の口縁に密着する弾性シ
ール部材と、該弾性シール部材をスライド部材側に押圧
する押圧部材とから成る構成を採用した。According to a fourth aspect of the present invention, there is provided a fuel backflow prevention valve interposed at a connection port between a fuel tank and a fuel supply pipe, comprising a slide type valve element for opening and closing the connection port. The valve body includes a slide member having a plurality of guide protrusions extending toward the upstream side of the connection port and slidingly contacting the inner wall surface on the upstream side, and an elastic seal member in close contact with an edge of the connection port. And a pressing member for pressing the elastic seal member toward the slide member.
【０００８】請求項５記載の発明は、請求項１乃至請求
項４を前提として、連結口部の下流側に複数の枠壁によ
って仕切られた燃料通過用の切欠孔を設けて、弁体の回
転阻止手段で、ガイド突起と上記枠壁とを一致する位置
に位置決めする構成を採用した。According to a fifth aspect of the present invention, based on the first to fourth aspects, a notch hole for fuel passage, which is partitioned by a plurality of frame walls, is provided on the downstream side of the connection port to provide a valve body. A configuration is adopted in which the guide projection and the frame wall are positioned at positions corresponding to each other by the rotation preventing means.
【０００９】請求項６記載の発明は、請求項１又は請求
項４を前提として、連結口部が弁体で閉塞されている状
態では、弁体はガイド突起のみで支承され、連結口部が
弁体で開放されている状態では、弁体は上記ガイド突起
と下流側に存する係合突起の弁体側の孔部に対する係合
とで支承される構成を採用した。According to a sixth aspect of the present invention, based on the first or fourth aspect, when the connection port is closed by the valve, the valve is supported only by the guide projection, and the connection port is closed. In the state where the valve element is opened by the valve element, the valve element adopts a configuration in which the valve element is supported by the guide projection and the engagement of the engagement projection on the downstream side with the hole on the valve element side.
【００１０】依って、請求項１の発明によれば、複数の
ガイド突起が連結口部の上流側の内壁面に摺接するの
で、弁体をガタつくことなく安定にスライドさせること
が可能となり、給油時には、燃料の流動抵抗を低減し、
連結口部の閉塞時には、シール性を向上できる。請求項
２の発明によれば、これに加えて、弁体が、下流側でも
その軸部によって支持されることとなるので、ガイド突
起との両持ち状態をもって、一層安定したスライドが保
障できる。Therefore, according to the first aspect of the present invention, since the plurality of guide protrusions are in sliding contact with the inner wall surface on the upstream side of the connection port, it is possible to slide the valve element stably without rattling. When refueling, reduce the flow resistance of the fuel,
When the connection port is closed, the sealing performance can be improved. According to the second aspect of the present invention, in addition to this, the valve body is also supported by the shaft portion on the downstream side, so that a more stable slide can be ensured by holding the valve body with the guide projection.
【００１１】請求項３の発明によれば、フランジ部の連
結口部の口縁に対する当接状態の下で、大径な弾性シー
ル部が連結口部の口縁に密着するので、シール性が一層
向上して、燃料の燃料供給管側への逆流を確実に防止で
きると共に、肩部の作用で、供給燃料が大径な弾性シー
ル部に衝突することを可及的に抑えられるので、上記し
たフランジ部の当接状態と相俟って、大径な弾性シール
部のヘタリを効果的に解消できる。According to the third aspect of the present invention, the large-diameter elastic seal portion is in close contact with the edge of the connection port under the state in which the flange portion is in contact with the edge of the connection port. Further, the backflow of the fuel to the fuel supply pipe side can be reliably prevented, and the action of the shoulder can suppress the supplied fuel from colliding with the large-diameter elastic seal portion as much as possible. In combination with the abutting state of the flange portion, settling of the large-diameter elastic seal portion can be effectively eliminated.
【００１２】請求項４の発明によれば、スライド部材の
ガイド突起が連結口部の上流側の内壁面に摺接するの
で、弁体自体をガタつくことなく安定にスライドさせる
ことが可能となり、給油時には、燃料の流動抵抗を低減
し、連結口部の閉塞時には、押圧部材で弾性シール部材
をスライド部材側に押圧して、当該弾性シール部材を連
結口部の口縁に確実に密着させることが可能となるの
で、シール性が向上して、やはり、燃料の燃料供給管側
への逆流を効果的に防止できる。According to the fourth aspect of the present invention, since the guide projection of the slide member comes into sliding contact with the inner wall surface on the upstream side of the connection port, the valve element itself can be slid without rattling, and the lubrication can be performed. In some cases, the flow resistance of the fuel is reduced, and when the connection port is closed, the pressing member presses the elastic seal member toward the slide member so that the elastic seal member is securely brought into close contact with the edge of the connection port. As a result, the sealing performance is improved, and again, the backflow of the fuel to the fuel supply pipe side can be effectively prevented.
【００１３】請求項５の発明によれば、弁体のスライド
に際しては、その回転阻止手段によって、弁体自体の不
要な回転を阻止できることに加えて、ガイド突起と枠壁
とを一致する位置に位置決めできるので、この点から
も、供給燃料の流動抵抗を低減することが可能となる。According to the fifth aspect of the present invention, when the valve body slides, the rotation preventing means can prevent unnecessary rotation of the valve body itself, and in addition, the guide projection can be located at a position where the frame wall coincides with the frame wall. Since the positioning can be performed, the flow resistance of the supplied fuel can be reduced from this point as well.
【００１４】請求項６の発明によれば、請求項２の如き
軸部を設けなくとも、連結口部の閉塞状態でも開放状態
でも、弁体自体を確実に支承することが可能となるの
で、突出する軸部の存在が燃料タンク内で支障を来す心
配がない。According to the sixth aspect of the present invention, the valve body itself can be securely supported even if the connecting port is closed or opened without providing the shaft as in the second aspect. There is no fear that the presence of the protruding shaft will cause any trouble in the fuel tank.
【００１５】[0015]
【発明の実施の形態】以下、本発明を図示する好適な実
施の形態に基づいて詳述すれば、第一実施の形態に係る
燃料逆流防止バルブは、図１に示す如く、燃料タンクと
連結する燃料供給管の下端部に接続されるハウジング１
と、該ハウジング１内にスライド可能に支承されるスラ
イド式の弁体２１と、ハウジング１の燃料タンク内に臨
む端部に取り付けられるキャップ４１と、弁体２１を上
記燃料供給管方向へ付勢するコイルスプリング５１とを
備えるものである。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a fuel check valve according to a first embodiment of the present invention; 1 connected to the lower end of the fuel supply pipe
A sliding valve body 21 slidably supported in the housing 1, a cap 41 attached to an end of the housing 1 facing the fuel tank, and biasing the valve body 21 toward the fuel supply pipe. And a coil spring 51.
【００１６】そして、ハウジング１は、図２にも示す如
く、合成樹脂で円筒状に別体成形されたタンク外部分２
Ａとタンク内部分２Ｂとから成り、タンク外部分２Ａに
対しては、上端開口周縁に燃料供給管の下端部を緊密に
嵌着する環状の凸面３を形成すると共に、該凸面３の下
方に樹脂製燃料タンクの側壁に溶着される大環状の溶着
片４を突設して、当該溶着片４の下面に係止窓５ａを有
する筒状の脚壁５を垂設する構成としている。As shown in FIG. 2, the housing 1 has a cylindrical outer portion 2 made of a synthetic resin.
A and an inner portion 2B of the tank, an annular convex surface 3 for tightly fitting the lower end of the fuel supply pipe is formed on the outer peripheral edge of the upper end of the tank 2A, and the lower surface of the convex portion 3 is formed below the convex surface 3. A large annular welding piece 4 to be welded to the side wall of the resin fuel tank is protruded, and a cylindrical leg wall 5 having a locking window 5a is vertically provided on the lower surface of the welding piece 4.
【００１７】タンク内部分２Ｂに対しては、その筒状を
呈する上部側の内壁面に、後述する弁体のガイド突起と
なるガイド羽根を案内する対の関係にある４個のガイド
リブ６を突設すると共に、同外壁面に上記脚壁５を受け
止める係止爪７ａを有する環状の受け壁７を設ける一
方、下部側を張り出し鍔８を介して上部側よりも若干大
径となして、その周囲に４個の枠壁９によって仕切られ
た燃料の通過を許容する大きな切欠孔１０を開設すると
共に、下端開口周縁にキャップ４１を取り付ける係止窓
１１を形成する構成となしている。この為、第一実施の
形態の下では、当該タンク内部分２Ｂの上記張り出し鍔
８の内側が燃料タンクとの連結口部１２となリ、張り出
し鍔８が連結口部１２の口縁となる。尚、上記４個のガ
イドリブ６と４個の枠壁９とは、図２のＢに示す如く、
その周方向において、夫々を全て同一線上に位置させる
ことが好ましいが、個数の相違などによっては、全てを
同一線上に位置させなくとも良い。On the inner part 2B of the tank, four paired guide ribs 6 are provided on the inner wall surface on the upper side of the cylindrical shape so as to guide a guide blade serving as a guide protrusion of a valve body to be described later. At the same time, an annular receiving wall 7 having a locking claw 7a for receiving the leg wall 5 is provided on the outer wall surface, while the lower side is slightly larger in diameter than the upper side via a protruding flange 8 and A large cut-out hole 10 is formed around the periphery of the fuel cell, which is partitioned by four frame walls 9 to allow passage of fuel, and a locking window 11 for attaching a cap 41 is formed around the lower end opening. For this reason, under the first embodiment, the inside of the overhang flange 8 of the in-tank portion 2 </ b> B becomes the connection opening 12 with the fuel tank, and the overhang flange 8 becomes the edge of the connection opening 12. . The four guide ribs 6 and the four frame walls 9 are, as shown in FIG.
In the circumferential direction, it is preferable that all are located on the same line. However, depending on the difference in the number and the like, not all of them need to be located on the same line.
【００１８】従って、シールリング１３を介在させて、
タンク外部分２Ａの脚壁５とタンク内部分２Ｂの受け壁
７同士をその係止窓５ａと係止爪７ａを介して係止し
て、この外周部にロックリング１４を嵌着すれば、図示
する如く、タンク外部分２Ａとタンク内部分２Ｂとが一
体化して、当該一体化したハウジング１の内部に上記連
結口部１２に続く燃料の通路が画成されることとなる。Therefore, with the seal ring 13 interposed,
If the leg wall 5 of the tank outer part 2A and the receiving wall 7 of the tank inner part 2B are locked via the locking window 5a and the locking claw 7a, and the lock ring 14 is fitted on the outer peripheral part, As shown, the tank outer portion 2A and the tank inner portion 2B are integrated, and a fuel passage following the connection port 12 is defined inside the integrated housing 1.
【００１９】弁体２１は、図３にも示す如く、スライド
部材２２と弾性シール部材２３と押圧部材２４とから成
り、スライド部材２２は、合成樹脂材料で上記連結口部
１２の上流側と対面する内部空洞の円錐形状に成形され
て、その円錐状の外周部に供給燃料の流動方向を規制す
る***した環状の肩部２５を形成すると共に、当該肩部
２５上に先端部が上記各対のガイドリブ６内に係入して
ハウジング１のタンク内部分２Ｂの内壁面に摺接する４
枚のガイド羽根２６を一定の傾斜角度をもって立設し、
且つ、下流側の外周縁にハウジング１の連結口部１２の
口縁となる張り出し鍔８に当接する環状のフランジ部２
７を設ける構成となっている。As shown in FIG. 3, the valve body 21 includes a slide member 22, an elastic seal member 23, and a pressing member 24. The slide member 22 is made of a synthetic resin material and faces the upstream side of the connection port 12. The conical outer peripheral portion is formed into a conical outer shape, and a raised annular shoulder portion 25 that regulates the flow direction of the supplied fuel is formed on the conical outer peripheral portion. 4 which slides on the inner wall surface of the tank inner portion 2B of the housing 1
The two guide blades 26 are erected at a certain inclination angle,
In addition, an annular flange portion 2 that abuts on a protruding flange 8 serving as an edge of the connection port portion 12 of the housing 1 on the outer peripheral edge on the downstream side.
7 is provided.
【００２０】又、弾性シール部材２３は、ゴム等の弾性
材料でリング状に成形されて、その外周縁を上記フラン
ジ部２７よりも大径で且つ上方に折曲した薄肉のシール
リップ部２８となし、押圧部材２４は、合成樹脂材料で
成形されて、スライド部材２２の内部に臨む頭部２９と
当該頭部２９から垂下する長寸な軸部３０とを一体に有
し、頭部２９の内側にコイルスプリング５１の上端部を
保持する環状の保持部３１を形成すると共に、その外周
縁に弾性シール部材２３をスライド部材２２のフランジ
部２７と共働して挾持するフランジ部３２を設ける構成
となっている。The elastic seal member 23 is formed of an elastic material such as rubber into a ring shape, and has a thin seal lip portion 28 whose outer peripheral edge is larger in diameter than the flange portion 27 and bent upward. The pressing member 24 is formed of a synthetic resin material, and integrally has a head 29 facing the inside of the slide member 22 and a long shaft portion 30 hanging down from the head 29. An annular holding portion 31 for holding the upper end portion of the coil spring 51 is formed inside, and a flange portion 32 for holding the elastic seal member 23 in cooperation with the flange portion 27 of the slide member 22 is provided on the outer peripheral edge thereof. It has become.
【００２１】キャップ４１は、合成樹脂で円盤状に成形
されて、その中心部に上記押圧部材２４の長寸な軸部３
０をスライド可能に嵌入支持する無底の支持筒部４２を
立設すると共に、該支持筒部４２の周囲にコイルスプリ
ング５１の下端部を保持する環状の保持凹部４３を形成
し、且つ、外周面に上記ハウジング１のタンク内部分２
Ｂ側に形成された係止窓１１に係止する複数の係止爪４
４を設ける構成となっている。The cap 41 is formed of a synthetic resin in the shape of a disk, and has a central portion at which the long shaft portion 3 of the pressing member 24 is formed.
0 is slidably fitted and supported, and an annular holding recess 43 for holding the lower end of the coil spring 51 is formed around the support cylinder 42, and the outer periphery is formed around the support cylinder 42. The inner surface 2 of the tank of the housing 1
A plurality of locking claws 4 for locking to the locking window 11 formed on the B side
4 is provided.
【００２２】従って、一体化されたハウジング１の下端
開口側から、ハウジング１内にスライド部材２２と弾性
シール部材２３と押圧部材２４とを順に嵌め込んで、最
後に、押圧部材２４の保持部３１とキャップ４１の保持
凹部４３間にコイルスプリング５１を装着すると同時
に、押圧部材２４の軸部３０をキャップ４１の支持筒部
４２内に嵌入しながら、係止窓１１と係止爪４４の係止
状態を得て、ハウジング１の下端開口側にキャップ４１
を取り付ければ、燃料逆流防止バルブが即座に組み付け
られる。Therefore, the slide member 22, the elastic seal member 23, and the pressing member 24 are sequentially fitted into the housing 1 from the lower end opening side of the integrated housing 1, and finally, the holding portion 31 of the pressing member 24 At the same time as the coil spring 51 is mounted between the holding recess 43 of the cap 41 and the shaft portion 30 of the pressing member 24 is fitted into the support cylinder portion 42 of the cap 41, the locking of the locking window 11 and the locking claw 44 is performed. After obtaining the state, the cap 41
Is installed, the fuel check valve is immediately assembled.
【００２３】又、斯る組み付け状態にあっては、コイル
スプリング５１の付勢ばね圧で、スライド部材２２のフ
ランジ部２７が上記張り出し鍔８に当接するまで、押圧
部材２４が弾性シール部材２３とスライド部材２２とを
ハウジング１の上流側に押しやると共に、スライド部材
２２の各ガイド羽根２６の先端部が各対のガイドリブ６
内に係入することとなるので、弁体２１自体は、ガイド
リブ６で拘束されたガイド羽根２６のタンク内部分２Ｂ
の内壁面に対する摺接と、軸部３０の支持筒部４２内に
対する嵌入とによる両持ち状態をもって、ハウジング１
内にスライド可能に支承されることとなる。In such an assembled state, the pressing member 24 and the elastic seal member 23 are kept in contact with each other by the urging spring pressure of the coil spring 51 until the flange 27 of the slide member 22 comes into contact with the overhanging flange 8. The sliding member 22 is pushed to the upstream side of the housing 1, and the distal end of each guide blade 26 of the sliding member 22 is
Therefore, the valve body 21 itself is in the tank portion 2 </ b> B of the guide blade 26 restrained by the guide rib 6.
The housing 1 has a double-supported state by sliding contact with the inner wall surface of the housing 1 and fitting of the shaft portion 30 into the support cylinder portion 42.
It is slidably supported inside.
【００２４】依って、斯る構成の燃料逆流防止バルブに
あっては、図４に示す如く、樹脂製燃料タンクＴの側壁
に予め穿設されている取付孔から、ハウジング１のタン
ク内部分２Ｂを燃料タンクＴ内に臨ましめながら、タン
ク外部分２Ａの溶着片４を当該燃料タンクＴの側壁に溶
着して、燃料タンクＴから突出するタンク外部分２Ａの
上端開口側に燃料供給管Ｐの下端部を嵌着すれば、これ
により、その使用に供せられることとなる。Accordingly, in the fuel backflow prevention valve having such a configuration, as shown in FIG. 4, a tank inner portion 2B of the housing 1 is formed through a mounting hole formed in advance in a side wall of the resin fuel tank T. The welding piece 4 of the tank outer portion 2A is welded to the side wall of the fuel tank T while facing the inside of the fuel tank T, and the fuel supply pipe P is formed at the upper end opening side of the tank outer portion 2A protruding from the fuel tank T. Is fitted to the lower end portion, thereby being used for use.
【００２５】そして、燃料供給管Ｐから給油ガン（図示
せず）を用いて給油を行なうと、供給燃料の流圧で、図
５に示す如く、弁体２１自体がコイルスプリング５１の
付勢ばね圧に抗して下流側にスライドして、ハウジング
１のタンク内部分２Ｂの連結口部１２を大きく開放する
ので、これにより、供給燃料は、各切欠孔１０から燃料
タンクＴ内に流入することが許容される。When fuel is supplied from the fuel supply pipe P by using a fueling gun (not shown), the valve body 21 itself is biased by the biasing spring of the coil spring 51 as shown in FIG. Since the connection port 12 of the in-tank portion 2B of the housing 1 is greatly opened by sliding to the downstream side against the pressure, the supplied fuel flows into the fuel tank T from each notch hole 10. Is acceptable.
【００２６】しかも、この給油時にあっては、スライド
部材２２が、自身の各ガイド羽根２６の先端部を対応す
る各対のガイドリブ６内に係入しながら、当該ガイドリ
ブ６で不要な回転が阻止された状態をもって、ハウジン
グ１のタンク内部分２Ｂの内壁面に沿ってスライドする
こととなるので、そのスライド姿勢が頗る安定して、供
給燃料の流動抵抗を高める心配がなくなると共に、下流
側にスライドしたガイド羽根２６はタンク内部分２Ｂの
各枠壁９と一致しているので、これによっても、供給燃
料の流動抵抗を高める心配がなくなる。又、弁体２１
は、上記した上流側と下流側の両持ち状態によっても、
安定したスライドが保障される。In addition, at the time of refueling, the slide member 22 prevents unnecessary rotation by the guide ribs 6 while engaging the tip end of each guide blade 26 in the corresponding pair of guide ribs 6. In this state, the housing 1 slides along the inner wall surface of the tank inner portion 2B, so that the sliding posture is extremely stable, and there is no need to increase the flow resistance of the supplied fuel. Since the guide blades 26 coincide with the frame walls 9 of the tank inner portion 2B, there is no need to increase the flow resistance of the supplied fuel. Also, the valve element 21
Depends on both the upstream and downstream sides,
A stable slide is guaranteed.
【００２７】更に、供給燃料は、スライド部材２２の隆
起した肩部２５によって、その流動方向が規制されて、
弾性シール部材２３のシールリップ部２８に衝突するこ
とが極力抑えられるので、特に、弾性シール部材２３の
シールリップ部２８が短期間にヘタル心配も全くない。Further, the flow direction of the supplied fuel is regulated by the raised shoulder 25 of the slide member 22,
Since the collision with the seal lip portion 28 of the elastic seal member 23 is suppressed as much as possible, the seal lip portion 28 of the elastic seal member 23 does not have any worries about burning in a short period of time.
【００２８】給油後は、今度は、図６に示す如く、コイ
ルスプリング５１の付勢ばね圧で、押圧部材２４が上流
側に押されるので、これに伴い、弁体２１自体は、スラ
イド部材２２のフランジ部２７が上記張り出し鍔８に当
接するまで、押圧部材２４のフランジ部３２とスライド
部材２２のフランジ部２７とで弾性シール部材２３をサ
ンドイッチ状態に挾持しながら、ハウジング１の上流側
にスライドして、弾性シール部材２３の大径なシールリ
ップ部２８をスライド部材２２のフランジ部２７の後方
から張り出し鍔８に密着させるので、これにより、ハウ
ジング１のタンク内部分２Ｂの連結口部１２が閉塞され
ることとなる。After refueling, as shown in FIG. 6, the urging spring pressure of the coil spring 51 pushes the pressing member 24 to the upstream side. Until the flange 27 of the sliding member 22 abuts on the flange 8, the elastic sealing member 23 is sandwiched between the flange 32 of the pressing member 24 and the flange 27 of the slide member 22, and is slid to the upstream side of the housing 1. Then, the large-diameter seal lip portion 28 of the elastic seal member 23 is brought into close contact with the protruding flange 8 from behind the flange portion 27 of the slide member 22, so that the connection port 12 of the tank inner portion 2B of the housing 1 is closed. It will be blocked.
【００２９】しかも、斯る閉塞状態にあっては、弾性シ
ール部材２３のシールリップ部２８が張り出し鍔８にば
ね圧を伴って密着することとなるので、連結口部１２は
完全なシール状態をもって閉塞されて、例え、衝突事故
等に起因して、燃料供給管Ｐが折損・破損したような場
合でも、燃料タンクＴ内の燃料がハウジング１の連結口
部１２を介して燃料供給管Ｐ側に逆流することを効果的
に防止できる。又、当該弾性シール部材２３のシールリ
ップ部２８は、スライド部材２２のフランジ部２７の張
り出し鍔８に対する当接状態の下で、張り出し鍔８に弾
性的に密着することとなるので、この点からも、弾性シ
ール部材２３の大径なシールリップ部２８がヘタルこと
を解消できる。Furthermore, in such a closed state, the seal lip portion 28 of the elastic seal member 23 comes into close contact with the overhanging flange 8 with spring pressure, so that the connection port portion 12 is kept in a completely sealed state. Even when the fuel supply pipe P is broken or damaged due to a collision accident or the like, the fuel in the fuel tank T can be supplied to the fuel supply pipe P through the connection port 12 of the housing 1. Backflow can be effectively prevented. In addition, the seal lip portion 28 of the elastic seal member 23 comes into close contact with the overhang flange 8 elastically under a state in which the flange portion 27 of the slide member 22 contacts the overhang flange 8. Also, it is possible to prevent the large-diameter seal lip 28 of the elastic seal member 23 from burning.
【００３０】次に、第二実施の形態に係る燃料逆流防止
バルブを説明すると、当該第二実施の形態のものも、基
本的には、上記第一実施の形態をそのまま踏襲するもの
であるが、異なるところは、特に、弁体２１側を以下の
構成となした点にある。Next, the fuel backflow prevention valve according to the second embodiment will be described. The second embodiment basically follows the first embodiment as it is. The difference is that the valve element 21 side is configured as follows.
【００３１】即ち、第二実施の形態にあっては、図７に
示す如く、キャップ４１の支持筒部４２に嵌入支持され
る軸部３０をスライド部材２２側に直に設けると共に、
４枚のガイド羽根２６の全長をハウジング１のタンク内
部分２Ｂの内壁面に摺接させる一方、フランジ部２７の
上面に環状の凸状部３３を設け、円錐形状の下流側中央
部に小径な位置決め筒部３４を設けると共に、押圧部材
２４の中央部に上記軸部３０を挿通する挿通孔３５を開
設して、その上流側に上記位置決め筒部３４を一定の間
隔を画して嵌合する大径な位置決め筒部３６を設ける構
成を採用している。That is, in the second embodiment, as shown in FIG. 7, the shaft portion 30 fitted and supported in the support cylinder portion 42 of the cap 41 is provided directly on the slide member 22 side.
The entire length of the four guide blades 26 is brought into sliding contact with the inner wall surface of the tank inner portion 2B of the housing 1, while an annular convex portion 33 is provided on the upper surface of the flange portion 27, and a small-diameter central portion on the downstream side of the cone is provided. A positioning cylinder 34 is provided, and an insertion hole 35 for inserting the shaft 30 is formed in the center of the pressing member 24, and the positioning cylinder 34 is fitted on the upstream side of the pressing member 24 with a predetermined interval. A configuration in which a large-diameter positioning cylinder 36 is provided is employed.
【００３２】依って、第二実施の形態の下でも、燃料供
給管Ｐから給油ガンを用いて給油を行なうと、具体的に
は図示しないが、供給燃料の流圧で、弁体２１自体がコ
イルスプリング５１の付勢ばね圧に抗して下流側にスラ
イドして、連結口部１２を大きく開放するので、これに
より、第一実施の形態と同様に、供給燃料は、各切欠孔
１０から燃料タンクＴ内に流入することが許容される。Therefore, also in the second embodiment, when refueling is performed from the fuel supply pipe P using a refueling gun, although not specifically shown, the valve body 21 itself is turned on by the flow pressure of the supplied fuel. Since the connection port portion 12 is greatly opened by sliding to the downstream side against the urging spring pressure of the coil spring 51, the supply fuel is supplied from each notch hole 10 similarly to the first embodiment. It is allowed to flow into the fuel tank T.
【００３３】しかし、この場合にあっては、スライド部
材２２の各ガイド羽根２６がその全長に亘ってタンク内
部分２Ｂの内壁面に沿ってスライドすることとなるの
で、そのスライド姿勢がより一層安定すると共に、ガイ
ド羽根２６の内壁面に対する摺接と軸部３０の支持筒部
４２に対する嵌入とで、スライド部材２２自体が両持ち
状態をもって支持されることとなるので、これによって
も、弁体２１自体の安定したスライド姿勢をより一層保
障できることとなる。However, in this case, since each guide blade 26 of the slide member 22 slides along the inner wall surface of the tank inner portion 2B over its entire length, the sliding posture is further stabilized. At the same time, the slide member 22 itself is supported in a double-supported state by the sliding contact with the inner wall surface of the guide blade 26 and the fitting of the shaft portion 30 into the support cylinder portion 42. The stable sliding posture of itself can be further ensured.
【００３４】又、給油後は、図示する如く、コイルスプ
リング５１の付勢ばね圧で、弁体２１自体が上流側にス
ライドして、弾性シール部材２３のシールリップ部２８
を張り出し鍔８に密着させることとなるので、これによ
り、連結口部１２が閉塞されることとなるが、斯る状態
にあっては、弾性シール部材２３のシールリップ部２８
が張り出し鍔８にばね圧を伴って密着することに加え
て、スライド部材２２のフランジ部２７に設けられた凸
状部３３も張り出し鍔８にばね圧を伴って密着して、連
結口部１２が二重の密着状態をもってシールされること
となるので、シール性が頗る向上する。従って、燃料タ
ンクＴ内の燃料が燃料供給管Ｐ側に逆流することをより
効果的に防止できることとなる。After refueling, the valve body 21 itself slides upstream by the urging spring pressure of the coil spring 51 as shown in FIG.
Is brought into close contact with the overhanging flange 8, thereby closing the connection opening 12. In such a state, the seal lip 28 of the elastic seal member 23 is closed.
In addition to the close contact with the overhang flange 8 with spring pressure, the convex portion 33 provided on the flange portion 27 of the slide member 22 also closely adheres to the overhang flange 8 with spring pressure, and Are sealed with a double contact state, so that the sealing performance is greatly improved. Therefore, it is possible to more effectively prevent the fuel in the fuel tank T from flowing back to the fuel supply pipe P side.
【００３５】更に、位置決め筒部３４と３６の作用で、
スライド部材２２と押圧部材２４とをセンタリングし
て、弾性シール部材２３を常に正しい位置で挾持するこ
とが可能となるので、弁体２１自体の組み付け性が良好
となることは勿論であるが、弾性シール部材２３のシー
ルリップ部２８を張り出し鍔８に確実に密着させること
も併せて保障できる。Further, by the action of the positioning cylinders 34 and 36,
The centering of the slide member 22 and the pressing member 24 makes it possible to always clamp the elastic seal member 23 at a correct position, so that the valve body 21 itself can be easily assembled. It can also be ensured that the seal lip portion 28 of the seal member 23 is securely adhered to the overhang flange 8.
【００３６】最後に、第三実施の形態に係る燃料逆流防
止バルブを説明すると、当該第三実施の形態のものは、
基本的な構造においては、上記第二実施の形態を前提と
するものであるが、第一・第二実施の形態のものと異な
るところは、押圧部材２４又はスライド部材２２側に設
けられる長寸な軸部３０を省略した点にある。何故な
ら、連結口部１２が閉塞されている状態では、問題とな
ることはないが、弁体２１が下流側にスライドして、連
結口部１２が開放されている状態では、上記軸部３０の
先端が支持筒部４２から燃料タンクＴ内に突出して、燃
料タンクＴのレイアウトによっては、当該燃料タンクＴ
の内側に付設されているバッフルや燃料回収チャンバー
等に干渉して、燃料逆流防止バルブの作動に支障を来す
恐れがあるからである。Lastly, a description will be given of a fuel backflow prevention valve according to the third embodiment.
Although the basic structure is based on the second embodiment, the difference from the first and second embodiments is that a long dimension provided on the pressing member 24 or the sliding member 22 is used. The point is that the shaft portion 30 is omitted. This is not a problem when the connection port 12 is closed. However, when the valve body 21 slides downstream and the connection port 12 is open, the shaft 30 Of the fuel tank T protrudes into the fuel tank T from the support cylinder portion 42, and depending on the layout of the fuel tank T, the fuel tank T
This is because it may interfere with the operation of the fuel backflow prevention valve by interfering with a baffle, a fuel recovery chamber, and the like provided inside the fuel cell.
【００３７】この為、第三実施の形態にあっては、図８
に示す如く、スライド部材２２と押圧部材２４の中央部
に連通する孔部３７・３８を積極的に開設する一方、キ
ャップ４１側に当該各孔部３７・３８と係合する係合突
起４５を支持筒部４２の代わりに設ける構成を採用して
いる。尚、弁体２１自体は、第一・第二実施の形態と同
様に、コイルスプリング５１の付勢ばね圧で上流側に弾
性的に付勢されるものである。For this reason, in the third embodiment, FIG.
As shown in FIG. 7, while the holes 37 and 38 communicating with the center of the slide member 22 and the pressing member 24 are positively opened, the engaging projections 45 that engage with the holes 37 and 38 are provided on the cap 41 side. The configuration provided in place of the support cylinder portion 42 is adopted. The valve body 21 itself is elastically urged upstream by the urging spring pressure of the coil spring 51, as in the first and second embodiments.
【００３８】依って、第三実施の形態の下でも、給油後
は、図示する如く、コイルスプリング５１の付勢ばね圧
で、弁体２１自体が上流側にスライドして、弾性シール
部材２３のシールリップ部２８を張り出し鍔８に密着さ
せることとなるので、これにより、連結口部１２が閉塞
されることとなるが、斯る状態にあっては、第一・第二
実施の形態とは異なり、弁体２１自体は、ガイドリブ６
で拘束されたガイド羽根２６のタンク内部分２Ｂの内壁
面に対する摺接のみで、ハウジング１内に支承されるこ
ととなる。Therefore, even under the third embodiment, after refueling, the valve body 21 itself slides upstream due to the urging spring pressure of the coil spring 51 as shown in FIG. Since the seal lip portion 28 is brought into close contact with the overhang flange 8, the connection port portion 12 is thereby closed, but in such a state, the first and second embodiments are different from the first and second embodiments. Differently, the valve element 21 itself is
Only the sliding contact of the guide blade 26 constrained with the inner wall surface of the tank inner portion 2B is supported in the housing 1.
【００３９】又、燃料供給管Ｐから給油ガンを用いて給
油を行なう時には、やはり、供給燃料の流圧で、弁体２
１自体がコイルスプリング５１の付勢ばね圧に抗して下
流側にスライドして、最終的には、連結口部１２を開放
することとなるが、その途中では、図９に示す如く、上
記した係合突起４５がスライドした押圧部材２４の孔部
３８を経てスライド部材２２の孔部３７と徐々に係合
し、弁体２１が完全に下流側にスライドすると、図１０
に示す如く、係合突起４５がスライド部材２２の孔部３
７と完全に係合するので、例え、軸部３０を有していな
くとも、連結口部１２を開放した状態にあっては、ガイ
ド羽根２６のタンク内部分２Ｂの内壁面に対する摺接
と、係合突起４５の各孔部３７・３８に対する係合とに
よる両持ち状態をもって、ハウジング１に支承されるこ
ととなる。When refueling is performed from the fuel supply pipe P using a refueling gun, the valve body 2 is also controlled by the flow pressure of the supplied fuel.
1 itself slides downstream against the urging spring pressure of the coil spring 51, and eventually opens the connection port portion 12. In the meantime, as shown in FIG. When the engaged engagement projection 45 gradually engages with the hole 37 of the slide member 22 via the hole 38 of the pressing member 24 slid, and the valve body 21 slides completely downstream, FIG.
As shown in FIG.
7 and completely engage with the inner wall surface of the tank inner portion 2B of the guide blade 26 even in the state where the connection port portion 12 is opened, even if the connecting portion 12 is not provided, even if the shaft portion 30 is not provided. The housing 1 is supported in a double-supported state by the engagement of the engagement projections 45 with the holes 37 and 38.
【００４０】従って、第三実施の形態にあっては、連結
口部１２の閉塞状態にあっては、弁体２１自体は、ガイ
ド羽根２６のみでハウジング１に支承されていると雖
も、下流側にスライドして、連結口部１２を開放する時
には、上記した上流側と下流側の両持ち状態をもって、
ハウジング１内に支承されることとなるので、弁体２１
の円滑なスライドが阻害される心配がないことは言うま
でもないが、特に、軸部３０を省略した関係で、第一・
第二実施の形態のように、レイアウト上、軸部３０の先
端が支持筒部４２から燃料タンクＴ内に突出して、当該
燃料タンクＴの内側に付設されているバッフルや燃料回
収チャンバー等に干渉して、燃料逆流防止バルブの作動
に支障を来す恐れが完全に解消できることとなる。尚、
その他の作用効果については、第二実施の形態のものと
同様であるので、ここでは、その説明を第二実施の形態
の記載に委ねるものとする。Therefore, in the third embodiment, when the connection port 12 is in the closed state, the valve element 21 itself is supported by the housing 1 only by the guide blade 26, but the downstream side is located downstream. Side, to open the connection port portion 12, hold both the upstream side and the downstream side described above,
The valve 21 is supported in the housing 1.
Needless to say, there is no fear that the smooth sliding of the first and second slides will be hindered.
As in the second embodiment, due to the layout, the tip of the shaft portion 30 projects from the support cylinder portion 42 into the fuel tank T, and interferes with a baffle, a fuel recovery chamber, and the like provided inside the fuel tank T. As a result, the risk of hindering the operation of the fuel check valve can be completely eliminated. still,
Other functions and effects are the same as those of the second embodiment, and the description thereof will be left to the description of the second embodiment.
【００４１】[0041]
【発明の効果】以上の如く、本発明は、上記構成の採用
により、請求項１の下では、複数のガイド突起が連結口
部の上流側の内壁面に摺接するので、弁体をガタつくこ
となく安定にスライドさせることが可能となり、給油時
には、燃料の流動抵抗を低減し、連結口部の閉塞時に
は、シール性を向上できる。請求項２の下では、これに
加えて、弁体が、下流側でもその軸部によって支持され
ることとなるので、ガイド突起との両持ち状態をもっ
て、一層安定したスライドが保障できる。As described above, according to the present invention, according to the first aspect of the present invention, the plurality of guide projections are in sliding contact with the inner wall surface on the upstream side of the connection port, so that the valve body is rattled. This makes it possible to slide stably without fuel, so that the fuel flow resistance can be reduced during refueling, and the sealing performance can be improved when the connection port is closed. According to the second aspect of the present invention, in addition to this, the valve element is supported by the shaft portion even on the downstream side, so that a more stable slide can be ensured by holding the valve body with the guide projection.
【００４２】請求項３の下では、フランジ部の連結口部
の口縁に対する当接状態の下で、大径な弾性シール部が
連結口部の口縁に密着するので、シール性が一層向上し
て、燃料の燃料供給管側への逆流を確実に防止できると
共に、肩部の作用で、供給燃料が大径な弾性シール部に
衝突することを可及的に抑えられるので、上記したフラ
ンジ部の当接状態と相俟って、大径な弾性シール部のヘ
タリを効果的に解消できる。According to the third aspect, the large-diameter elastic seal portion comes into close contact with the edge of the connection port under a state in which the flange portion is in contact with the edge of the connection port, so that the sealing performance is further improved. As a result, the backflow of the fuel to the fuel supply pipe side can be reliably prevented, and the action of the shoulder can minimize the collision of the supplied fuel with the large-diameter elastic seal portion. In combination with the abutting state of the parts, settling of the large-diameter elastic seal part can be effectively eliminated.
【００４３】請求項４の下では、スライド部材のガイド
突起が連結口部の上流側の内壁面に摺接するので、弁体
自体をガタつくことなく安定にスライドさせることが可
能となり、給油時には、燃料の流動抵抗を低減し、連結
口部の閉塞時には、押圧部材で弾性シール部材をスライ
ド部材側に押圧して、当該弾性シール部材を連結口部の
口縁に確実に密着させることが可能となるので、シール
性が向上して、やはり、燃料の燃料供給管側への逆流を
効果的に防止できる。According to the fourth aspect, since the guide projection of the slide member comes into sliding contact with the inner wall surface on the upstream side of the connection port, the valve body itself can be slid without rattling, and at the time of refueling, The flow resistance of the fuel is reduced, and when the connection port is closed, the elastic seal member is pressed toward the slide member by the pressing member, so that the elastic seal member can be securely brought into close contact with the edge of the connection port. Therefore, the sealing performance is improved, and the backflow of the fuel to the fuel supply pipe side can be effectively prevented.
【００４４】請求項５の下では、弁体のスライドに際し
ては、その回転阻止手段によって、弁体自体の不要な回
転を阻止できることに加えて、ガイド突起と枠壁とを一
致する位置に位置決めできるので、この点からも、供給
燃料の流動抵抗を低減することが可能となる。According to the fifth aspect, when the valve body slides, unnecessary rotation of the valve body itself can be prevented by the rotation preventing means, and the guide projection and the frame wall can be positioned at the same position. Therefore, also from this point, the flow resistance of the supplied fuel can be reduced.
【００４５】請求項６の下では、請求項２の如き軸部を
設けなくとも、連結口部の閉塞状態でも開放状態でも、
弁体自体を確実に支承することが可能となるので、突出
する軸部の存在が燃料タンク内で支障を来す心配がな
い。According to the sixth aspect of the present invention, even if the shaft is not provided as in the second aspect, the connection port can be closed or opened.
Since it is possible to securely support the valve body itself, there is no fear that the presence of the protruding shaft portion causes an obstacle in the fuel tank.
【図１】本発明の第一実施の形態に係る燃料逆流防止バ
ルブを分解して示す斜視図である。FIG. 1 is an exploded perspective view showing a fuel backflow prevention valve according to a first embodiment of the present invention.
【図２】（Ａ）はハウジングを示す断面図、（Ｂ）は図
２ＡのＡ−Ａ線断面図である。2A is a cross-sectional view showing a housing, and FIG. 2B is a cross-sectional view taken along line AA of FIG. 2A.
【図３】弁体を分解して示す断面図である。FIG. 3 is an exploded sectional view showing a valve body.
【図４】同燃料逆流防止バルブを燃料タンクと燃料供給
管間に介装した状態を示す説明図である。FIG. 4 is an explanatory view showing a state in which the fuel backflow prevention valve is interposed between a fuel tank and a fuel supply pipe.
【図５】給油時に連結口部を開放した作動状態を示す要
部断面図である。FIG. 5 is an essential part cross-sectional view showing an operating state in which a connection port is opened at the time of refueling.
【図６】給油後に連結口部を閉塞した作動状態を示す要
部断面図である。FIG. 6 is a sectional view of a main part showing an operating state in which a connection port is closed after refueling.
【図７】（Ａ）は第二実施の形態に係る燃料逆流防止バ
ルブを給油後に連結口部を閉塞した作動状態をもって示
す要部断面図、（Ｂ）は同シール状態を説明する拡大説
明図である。FIG. 7A is a sectional view of an essential part showing an operating state in which a connection opening is closed after refueling of a fuel backflow prevention valve according to a second embodiment, and FIG. 7B is an enlarged explanatory view for explaining the sealing state; It is.
【図８】第三実施の形態に係る燃料逆流防止バルブを給
油後に連結口部を閉塞した作動状態をもって示す要部断
面図である。FIG. 8 is a cross-sectional view of an essential part showing an operation state in which a connection port is closed after refueling of a fuel backflow prevention valve according to a third embodiment.
【図９】給油時に連結口部を開放する途中の作動状態を
示す要部断面図である。FIG. 9 is a cross-sectional view of a main part showing an operating state during opening of a connection port during refueling.
【図１０】給油時に連結口部を開放した作動状態を示す
要部断面図である。FIG. 10 is an essential part cross-sectional view showing an operating state in which a connection port is opened at the time of refueling.
１ ハウジング ２Ａ タンク外部分 ２Ｂ タンク内部分 ６ ガイドリブ（回転阻止手段） ８ 張り出し鍔（連結口部の口縁） ９ 枠壁 １０ 切欠孔 １２ 連結口部 ２１ 弁体 ２２ スライド部材 ２３ 弾性シール部材 ２４ 押圧部材 ２５ 肩部 ２６ ガイド羽根（ガイド突起） ２７ スライド部材のフランジ部 ２８ シールリップ部（弾性シール部） ２９ 頭部 ３０ 軸部 ３２ 押圧部材のフランジ部 ３３ 凸状部 ３７ 孔部 ３８ 孔部 ４１ キャップ ４２ 支持筒部 ４５ 係合突起 ５１ コイルスプリング Ｔ 燃料タンク Ｐ 燃料供給管 DESCRIPTION OF SYMBOLS 1 Housing 2A Tank outer part 2B Tank inner part 6 Guide rib (rotation prevention means) 8 Projection flange (edge of connection opening) 9 Frame wall 10 Notch hole 12 Connection opening 21 Valve element 22 Slide member 23 Elastic seal member 24 Pressing Member 25 Shoulder 26 Guide vane (guide protrusion) 27 Flange of slide member 28 Seal lip (elastic seal) 29 Head 30 Shaft 32 Flange of pressing member 33 Convex portion 37 Hole 38 Hole 41 Cap 42 Support cylinder part 45 Engagement projection 51 Coil spring T Fuel tank P Fuel supply pipe
Claims (6)
介装される燃料逆流防止バルブであって、上記連結口部
を開閉するスライド式の弁体を備え、該弁体に連結口部
の上流側に向かって伸長して当該上流側の内壁面に摺接
する複数のガイド突起を設けたことを特徴とする燃料逆
流防止バルブ。1. A fuel backflow prevention valve interposed at a connection port between a fuel tank and a fuel supply pipe, comprising: a slide-type valve element that opens and closes the connection port. A plurality of guide projections extending toward the upstream side of the portion and slidingly contacting the inner wall surface on the upstream side.
する軸部を設けて、当該軸部をスライド可能に支持した
ことを特徴とする請求項１記載の燃料逆流防止バルブ。2. The fuel backflow prevention valve according to claim 1, wherein a shaft portion extending toward the downstream side of the connection port portion is provided on the valve body, and the shaft portion is slidably supported.
料の流動方向を規制する肩部を形成すると共に、同弁体
の下流側に連結口部の口縁に当接するフランジ部を設け
て、当該フランジ部よりも大径な弾性シール部をフラン
ジ部の後方から連結口部の口縁に密着させることを特徴
とする請求項１乃至請求項２のいずれかに記載の燃料逆
流防止バルブ。3. A conical-shaped valve body having an outer peripheral portion formed with a shoulder portion for regulating the flow direction of supplied fuel, and a downstream-side flange portion provided with an abutting edge of a connection port portion. 3. The fuel backflow prevention valve according to claim 1, wherein an elastic seal portion having a diameter larger than that of the flange portion is brought into close contact with an edge of the connection port portion from behind the flange portion. .
介装される燃料逆流防止バルブであって、上記連結口部
を開閉するスライド式の弁体を備え、該弁体は、連結口
部の上流側に向かって伸長して当該上流側の内壁面に摺
接する複数のガイド突起を設けたスライド部材と、上記
連結口部の口縁に密着する弾性シール部材と、該弾性シ
ール部材をスライド部材側に押圧する押圧部材とから成
ることを特徴とする燃料逆流防止バルブ。4. A fuel backflow prevention valve interposed at a connection port between a fuel tank and a fuel supply pipe, the valve including a slide valve for opening and closing the connection port. A slide member having a plurality of guide projections extending toward the upstream side of the mouth and slidingly contacting the inner wall surface on the upstream side; an elastic seal member closely contacting an edge of the connection opening; and the elastic seal member. And a pressing member for pressing the valve against the slide member.
仕切られた燃料通過用の切欠孔を設けて、弁体の回転阻
止手段で、ガイド突起と上記枠壁とを一致する位置に位
置決めすることを特徴とする請求項１乃至請求項４のい
ずれかに記載の燃料逆流防止バルブ。5. A notch hole for fuel passage, which is partitioned by a plurality of frame walls, is provided on the downstream side of the connection port, and the guide protrusion and the frame wall are aligned by the valve body rotation preventing means. The fuel check valve according to any one of claims 1 to 4, wherein the valve is positioned.
は、弁体はガイド突起のみで支承され、連結口部が弁体
で開放されている状態では、弁体は上記ガイド突起と下
流側に存する係合突起の弁体側の孔部に対する係合とで
支承されることを特徴とする請求項１又は請求項４のい
ずれかに記載の燃料逆流防止バルブ。6. The valve element is supported only by the guide projection when the connection port is closed by the valve element, and the valve element is connected to the guide projection when the connection port is opened by the valve element. The fuel backflow prevention valve according to any one of claims 1 to 4, wherein the valve is supported by engagement of an engagement projection existing on the downstream side with a hole on the valve body side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19827398A JP3634631B2 (en) | 1997-07-14 | 1998-07-14 | Fuel backflow prevention valve |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9-202624 | 1997-07-14 | ||
| JP20262497 | 1997-07-14 | ||
| JP19827398A JP3634631B2 (en) | 1997-07-14 | 1998-07-14 | Fuel backflow prevention valve |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003409941A Division JP2004136885A (en) | 1997-07-14 | 2003-12-09 | Fuel check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1178549A true JPH1178549A (en) | 1999-03-23 |
| JP3634631B2 JP3634631B2 (en) | 2005-03-30 |
Family
ID=26510883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19827398A Expired - Fee Related JP3634631B2 (en) | 1997-07-14 | 1998-07-14 | Fuel backflow prevention valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3634631B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003002074A (en) * | 2001-06-26 | 2003-01-08 | Nifco Inc | Accessory part for synthetic resin fuel tank |
| JP2005221043A (en) * | 2004-02-09 | 2005-08-18 | Yachiyo Industry Co Ltd | Valve sealing structure for fuel tank |
| JP2006320386A (en) * | 2005-05-17 | 2006-11-30 | Daiichi Jonan Kk | Hydrant apparatus |
| JP2009092180A (en) * | 2007-10-11 | 2009-04-30 | Yachiyo Industry Co Ltd | Valve structure |
| JP2010089757A (en) * | 2008-10-10 | 2010-04-22 | Piolax Inc | Fuel check-valve |
| JP2010117022A (en) * | 2008-11-14 | 2010-05-27 | Tlv Co Ltd | Check valve |
| DE102009017983A1 (en) * | 2009-04-21 | 2010-10-28 | Volkswagen Ag | Pressure relief valve for fuel supply system of motor vehicle, has valve body subjected with resetting force and comprising three guiding lips axially rising into inlet channel and radially arranged to center axis of valve body |
| KR101103912B1 (en) * | 2003-05-23 | 2012-01-12 | 이턴 코포레이션 | Flapper type fill tube check valve |
| JP2014080105A (en) * | 2012-10-16 | 2014-05-08 | Nifco Inc | Pipe joint for fuel tank |
| WO2020231497A1 (en) * | 2019-05-14 | 2020-11-19 | Halliburton Energy Services, Inc. | Valve assembly for a fluid end with limited access |
-
1998
- 1998-07-14 JP JP19827398A patent/JP3634631B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003002074A (en) * | 2001-06-26 | 2003-01-08 | Nifco Inc | Accessory part for synthetic resin fuel tank |
| JP4694723B2 (en) * | 2001-06-26 | 2011-06-08 | 株式会社ニフコ | Accessories for plastic fuel tanks |
| KR101103912B1 (en) * | 2003-05-23 | 2012-01-12 | 이턴 코포레이션 | Flapper type fill tube check valve |
| JP2005221043A (en) * | 2004-02-09 | 2005-08-18 | Yachiyo Industry Co Ltd | Valve sealing structure for fuel tank |
| JP2006320386A (en) * | 2005-05-17 | 2006-11-30 | Daiichi Jonan Kk | Hydrant apparatus |
| JP2009092180A (en) * | 2007-10-11 | 2009-04-30 | Yachiyo Industry Co Ltd | Valve structure |
| JP2010089757A (en) * | 2008-10-10 | 2010-04-22 | Piolax Inc | Fuel check-valve |
| JP2010117022A (en) * | 2008-11-14 | 2010-05-27 | Tlv Co Ltd | Check valve |
| DE102009017983A1 (en) * | 2009-04-21 | 2010-10-28 | Volkswagen Ag | Pressure relief valve for fuel supply system of motor vehicle, has valve body subjected with resetting force and comprising three guiding lips axially rising into inlet channel and radially arranged to center axis of valve body |
| JP2014080105A (en) * | 2012-10-16 | 2014-05-08 | Nifco Inc | Pipe joint for fuel tank |
| WO2020231497A1 (en) * | 2019-05-14 | 2020-11-19 | Halliburton Energy Services, Inc. | Valve assembly for a fluid end with limited access |
| US11105327B2 (en) | 2019-05-14 | 2021-08-31 | Halliburton Energy Services, Inc. | Valve assembly for a fluid end with limited access |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3634631B2 (en) | 2005-03-30 |
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