JP2007002741A - Fuel tank - Google Patents

Fuel tank Download PDF

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Publication number
JP2007002741A
JP2007002741A JP2005183598A JP2005183598A JP2007002741A JP 2007002741 A JP2007002741 A JP 2007002741A JP 2005183598 A JP2005183598 A JP 2005183598A JP 2005183598 A JP2005183598 A JP 2005183598A JP 2007002741 A JP2007002741 A JP 2007002741A
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JP
Japan
Prior art keywords
tank
fuel
cap
filler cylinder
fuel tank
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JP2005183598A
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Japanese (ja)
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JP4395107B2 (en
Inventor
Yasunori Matsubara
泰則 松原
Teruyuki Saito
照幸 斉藤
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP2005183598A priority Critical patent/JP4395107B2/en
Priority to TW095119997A priority patent/TWI312388B/en
Priority to MYPI20062833A priority patent/MY142134A/en
Priority to PE2006000692A priority patent/PE20070127A1/en
Priority to ARP060102681A priority patent/AR057392A1/en
Priority to CA2769741A priority patent/CA2769741C/en
Priority to CA2605647A priority patent/CA2605647C/en
Priority to KR1020077026537A priority patent/KR100933253B1/en
Priority to DE602006021573T priority patent/DE602006021573D1/en
Priority to PA20068682201A priority patent/PA8682201A1/en
Priority to AU2006260111A priority patent/AU2006260111B2/en
Priority to NZ562776A priority patent/NZ562776A/en
Priority to CN200680020854XA priority patent/CN101193801B/en
Priority to BRPI0611270-6A priority patent/BRPI0611270B1/en
Priority to PCT/JP2006/312613 priority patent/WO2006137524A1/en
Priority to EP06780650A priority patent/EP1902966B1/en
Priority to US11/919,560 priority patent/US9162564B2/en
Publication of JP2007002741A publication Critical patent/JP2007002741A/en
Application granted granted Critical
Publication of JP4395107B2 publication Critical patent/JP4395107B2/en
Expired - Fee Related legal-status Critical Current
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel tank capable of maintaining good sealing performance of a seal face of a fuel filler cylinder for a long period while maintaining good appearance of a tank ceiling part, and having excellent productivity. <P>SOLUTION: In this fuel tank, the fuel filler cylinder 18 penetrating through the tank ceiling part and closed by a tank cap C is combined with the tank ceiling part, and the annular seal face 19 with which a packing 23 of the tank cap C is made close contact is formed on the upper end face of the fuel filler cylinder 18. At least a tank upper half body 7 comprising a tank upper part is made of a color steel plate having a surface to which coating is applied beforehand, and the fuel filler cylinder 18 made of a plated steel plate is caulked to the tank upper half body 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は，タンク天井部に，タンクキャップにより閉鎖される給油口筒を結合し，この給油口筒の上端面に，タンクキャップのパッキンが密接する環状のシール面を形成した燃料タンクの改良に関する。   The present invention relates to an improvement of a fuel tank in which a fuel filler cylinder closed by a tank cap is connected to a tank ceiling, and an annular sealing surface is formed on the upper end surface of the fuel filler cylinder so that the packing of the tank cap is in close contact therewith. .

従来のかゝる燃料タンクには，特許文献１にも開示されているように，下記（１）及び（２）の構造のものがある。
（１）鋼板製のタンク天井部に鋼板製の給油口筒を結合し，タンク天井部の表面から給油口筒のシール面に亙り塗装を施している。
（２）鋼板製のタンク天井部に，ステンレス鋼板製の給油口筒を結合し，この給油口筒を除いて，タンク表面に塗装を施している。
特開平７−３４９８５号公報 Such conventional fuel tanks have the following structures (1) and (2) as disclosed in Patent Document 1.
(1) A steel plate filler tube is connected to a steel plate tank ceiling, and the surface of the tank ceiling is coated on the sealing surface of the filler tube.
(2) A stainless steel plate filler tube is connected to the tank ceiling made of steel plate, and the tank surface is painted except for this filler tube.
JP-A-7-34985

ところで，上記（１）のものでは，給油口筒のシール面に形成された塗膜が，長期間の使用により次第に剥離し，その剥離塗膜が燃料タンク内に落下して，燃料フィルタを詰まらせたり，塗膜の部分剥離によりシール面のシール性が低下する等の欠点がある。また上記（２）のものでは，給油口筒のシール面を長期間良好に保つことができるものゝ，タンク天井部と給油口筒との結合後に，タンク表面を塗装するものであるから，その塗装時には，給油口筒の特にシール面に塗料の付着を防ぐマスキングを施し，また塗装後は，そのマスキングを剥がす等の面倒な工程が必要であり，生産性が劣る欠点がある。   By the way, in the above (1), the coating film formed on the sealing surface of the fuel filler tube gradually peels off after long-term use, and the peeling coating film falls into the fuel tank and clogs the fuel filter. There is a disadvantage that the sealing performance of the sealing surface is lowered due to the peeling or partial peeling of the coating film. In the above (2), the seal surface of the filler cylinder can be kept good for a long time, and the tank surface is painted after the tank ceiling and the filler cylinder are joined. At the time of painting, masking to prevent the paint from adhering is applied to the sealing surface of the oil filler cylinder, and after painting, a troublesome process such as peeling off the masking is necessary, resulting in poor productivity.

本発明は，かゝる事情に鑑みてなされたもので，タンク天井部の美観を保ちつゝ，給油口筒のシール面のシール性を長期間良好に保持することができ，しかも生産性に優れた前記燃料タンクを提供することを目的とする。   The present invention has been made in view of such circumstances, and can maintain the aesthetics of the tank ceiling, maintain the sealing performance of the sealing surface of the fuel filler cylinder for a long period of time, and improve productivity. An object of the present invention is to provide an excellent fuel tank.

上記目的を達成するために，本発明は，タンク天井部に，それを貫通してタンクキャップにより閉鎖される給油口筒を結合し，この給油口筒の上端面に，タンクキャップのパッキンが密接する環状のシール面を形成した，燃料タンクにおいて，前記タンク上部を構成する少なくとも上部タンク半体を，表面に予め塗装を施したカラー鋼板製とし，この上部タンク半体に非塗装鋼板製の給油口筒を結合したことを第１の特徴とする。   In order to achieve the above object, according to the present invention, an oil filler cylinder that passes through the tank ceiling and is closed by a tank cap is coupled, and the packing of the tank cap is in close contact with the upper end surface of the oil filler cylinder. In the fuel tank having an annular sealing surface, at least the upper tank half constituting the upper part of the tank is made of a colored steel plate whose surface has been pre-coated, and the upper tank half is made of unpainted steel plate The first feature is that the mouthpieces are combined.

また本発明は，第１の特徴に加えて，上部タンク半体と給油口筒とを，給油口筒の上部が露出するように，かしめ結合すると共に，この給油口筒の上方露出面を前記シール面に形成したことを第２の特徴とする。   According to the present invention, in addition to the first feature, the upper tank half and the fuel filler cylinder are caulked and joined so that the upper part of the fuel filler cylinder is exposed, and the upper exposed surface of the fuel filler cylinder is defined by The second feature is that the seal surface is formed.

さらに本発明は，第１又は第２の特徴に加えて，前記シール面を漏斗状に形成したことを第３の特徴とする。   Furthermore, in addition to the first or second feature, the present invention has a third feature that the sealing surface is formed in a funnel shape.

さらにまた本発明は，第２又は第３の特徴の何れかに加えて，給油口筒をメッキ鋼板製としたことを第４の特徴とする。   Furthermore, in addition to any of the second or third features, the present invention has a fourth feature in that the oil filler tube is made of a plated steel plate.

本発明の第１の特徴によれば，上部タンク半体をカラー鋼板製とすることで，その美観を良好にすることができ，またこの上部タンク半体に結合され，シール面を有する給油口筒を非塗装鋼板製とすることで，上部タンク半体表面の塗膜の万一の剥離に関係なく給油口筒のシール面を長期に亙り良好に保つことができる。しかも上部タンク半体への給油口筒の結合後には，塗装やマスキング等の面倒な工程は不要であるから，生産性の向上を図ることができる。   According to the first feature of the present invention, the upper tank half is made of a color steel plate, so that the aesthetics can be improved, and the fuel filler port connected to the upper tank half and having a sealing surface is provided. By making the cylinder made of non-painted steel plate, the sealing surface of the fuel filler cylinder can be maintained well over a long period of time regardless of the peeling of the paint film on the surface of the upper tank half. In addition, after joining the fuel tank to the upper tank half, troublesome processes such as painting and masking are unnecessary, so that productivity can be improved.

また本発明の第２の特徴によれば，カラー鋼板製の上部タンク半体と，非塗装鋼板製の給油口筒とは相互にかしめ結合されるので，溶接による結合とは異なり，上部タンク半体表面の塗膜の焼損や給油口筒のシール面の熱変形の心配がなく，のみならずシール面の剛性を効果的に高めることができる。したがって上部タンク半体の美観の確保と，シール面の耐久性の向上とを両立させることができる。   Further, according to the second feature of the present invention, the upper tank half made of the color steel plate and the filler tube made of the non-painted steel plate are caulked and connected to each other. There is no fear of burning of the coating film on the body surface or thermal deformation of the sealing surface of the fuel filler cylinder, and not only the rigidity of the sealing surface can be effectively increased. Therefore, it is possible to achieve both of ensuring the aesthetics of the upper tank half and improving the durability of the sealing surface.

さらに本発明の第３の特徴によれば，燃料タンクへの給油中，シール面に燃料が付着したとき，その燃料を漏斗状のシール面に沿って燃料タンク内に自然に流入させることができ，これにより燃料による燃料タンク上面の汚損を防ぐことができる。   Further, according to the third feature of the present invention, when fuel adheres to the seal surface during refueling to the fuel tank, the fuel can naturally flow into the fuel tank along the funnel-shaped seal surface. This prevents the upper surface of the fuel tank from being soiled by the fuel.

さらにまた本発明の第４の特徴によれば，給油口筒をメッキ鋼板製としたことで，給油口筒を，そのメッキ層を剥離することなく上部タンク半体にかしめ結合することができると共に，メッキ層によりシール面を良好にすると共に，その耐久性の更なる向上を図ることができる。   Furthermore, according to the fourth feature of the present invention, the oil filler tube is made of a plated steel plate, so that the oil filler tube can be caulked and joined to the upper tank half without peeling off the plated layer. The plated layer can improve the sealing surface and further improve the durability.

本発明の実施の形態を，添付図面に示す本発明の好適な実施例に基づいて以下に説明する。   Embodiments of the present invention will be described below on the basis of preferred embodiments of the present invention shown in the accompanying drawings.

図１は本発明の実施例に係る汎用エンジンの正面図，図２は同エンジンに取り付けられた燃料タンクの縦断面図，図３は図２の３部拡大図，図４は図３の４部拡大図，図５は図３の５−５線断面図，図６は図３の６−６線断面図である。   1 is a front view of a general-purpose engine according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of a fuel tank attached to the engine, FIG. 3 is an enlarged view of a part 3 in FIG. 2, and FIG. 5 is a sectional view taken along line 5-5 of FIG. 3, and FIG. 6 is a sectional view taken along line 6-6 of FIG.

先ず，図１において，符号Ｅは各種作業機の動力源となる汎用４サイクルエンジンを示す。このエンジンＥは，水平方向に配置されるクランク軸１を支持するクランクケース２と，このクランクケース２から斜め上方に突出したシリンダ部３とを備えており，クランクケース２の直上には，それに支持される燃料タンクＴが配置され，またシリンダ部３の一側には気化器４が取り付けられ，この気化器４に吸気ダクト５を介して接続されるエアクリーナ６が，燃料タンクＴの側方に並ぶようにしてシリンダ部３の直上に配置される。   First, in FIG. 1, a symbol E indicates a general-purpose four-cycle engine that serves as a power source for various working machines. The engine E includes a crankcase 2 that supports a crankshaft 1 that is disposed in the horizontal direction, and a cylinder portion 3 that projects obliquely upward from the crankcase 2. A fuel tank T to be supported is disposed, and a carburetor 4 is attached to one side of the cylinder portion 3, and an air cleaner 6 connected to the carburetor 4 via an intake duct 5 is provided on the side of the fuel tank T. Are arranged directly above the cylinder portion 3.

図２において，上記燃料タンクＴは，それぞれ椀状をなして燃料貯留室１０を画成すべく対向する上部タンク半体７及び下部タンク半体８と，下部タンク半体８の下面を空隙を存して覆う底板９の三者で構成され，この三者７，８，９は，その外周部が纏めて一体にかしめ結合され，その際，三者７，８，９の結合面間にはシール剤が塗布される。そして上記底板９は，クランクケース２の上部に固着されるブラケット１１にマウントゴム１２，１２を介してボルト１３，１３により取り付けられ，こうして燃料タンクＴはエンジンＥに弾性支持される。上部タンク半体７，下部タンク半体８及び底板９は，何れも鋼板製であり，特に上部タンク半体７及び底板９は，鋼板の表面に塗膜１６を予め焼き付けてなるカラー鋼板製である。   In FIG. 2, each of the fuel tanks T has a bowl-like shape, and an upper tank half 7 and a lower tank half 8 that face each other to define a fuel storage chamber 10, and a lower surface of the lower tank half 8 has a gap. The bottom plate 9 is covered with three members, and these three members 7, 8, and 9 are caulked and joined together at the outer periphery. A sealant is applied. The bottom plate 9 is attached to the bracket 11 fixed to the upper part of the crankcase 2 by means of bolts 13 and 13 via mount rubbers 12 and 12, so that the fuel tank T is elastically supported by the engine E. The upper tank half 7, the lower tank half 8 and the bottom plate 9 are all made of steel plates, and in particular, the upper tank half 7 and the bottom plate 9 are made of color steel plates obtained by baking the coating film 16 on the surface of the steel plates in advance. is there.

下部タンク半体８の底壁には，ストレーナ１５を介して燃料貯留室１０に開口する燃料導管１４が接続され，ストレーナ１５で濾過された燃料貯留室１０の燃料が重力でこの燃料導管１４を通して前記気化器４に供給されるようになっており，その際，燃料貯留室１０の呼吸を可能にする迷路状のエアベントが後述するタンクキャップＣに備えられる。   A fuel conduit 14 that opens to the fuel storage chamber 10 is connected to the bottom wall of the lower tank half 8 via a strainer 15, and fuel in the fuel storage chamber 10 filtered by the strainer 15 passes through the fuel conduit 14 by gravity. In this case, a labyrinth-like air vent that allows the fuel storage chamber 10 to breathe is provided in a tank cap C to be described later.

図３及び図４に示すように，上部タンク半体７の中央部には，それを貫通するメッキ鋼板製（即ち非塗装鋼板製）の給油口筒１８の上端部が，該上端部が露出するようにしてかしめ結合され，この給油口筒１８の露出した上端部に漏斗状のシール面１９が形成される。また給油口筒１８の下端には，燃料貯留室１０に注入される燃料を濾過する燃料フィルタ１７が連結される。   As shown in FIGS. 3 and 4, at the center of the upper tank half 7, the upper end portion of the oil supply port cylinder 18 made of a plated steel plate (that is, made of non-painted steel plate) penetrating therethrough is exposed. In this way, a funnel-shaped sealing surface 19 is formed at the exposed upper end portion of the fuel filler cylinder 18. A fuel filter 17 that filters fuel injected into the fuel storage chamber 10 is connected to the lower end of the fuel filler cylinder 18.

給油口筒１８にはタンクキャップＣが装着される。このタンクキャップＣは，合成樹脂製のキャップボディ２０，同じく合成樹脂製のキャップインナ２１，鋼板製のキャップシェル２２及びパッキン２３を主たる構成要素とする。   A tank cap C is attached to the fuel filler cylinder 18. The tank cap C mainly includes a synthetic resin cap body 20, a synthetic resin cap inner 21, a steel plate cap shell 22 and a packing 23.

キャップボディ２０は，給油口筒１８の内周面に螺合し得るねじ部２４を外周に形成した天井付きの円筒部２０ａと，この円筒部２０ａの上端部から半径方向に張り出すフランジ部２０ｂとを備えており，円筒部２０ａの上部外周面には，フランジ部２０ｂの下面に連なる環状の取り付け溝２５が形成される。この取り付け溝２５に，前記シール面１９に密接する前記パッキン２３が装着される。またキャップシェル２２の天井部中心には，給油口筒１８から外したタンクキャップＣの脱落を防ぐティザー２６（図２及び図３参照）が接続される。   The cap body 20 includes a cylindrical portion 20a with a ceiling formed with a screw portion 24 that can be screwed onto the inner peripheral surface of the fuel filler cylinder 18, and a flange portion 20b that projects radially from the upper end portion of the cylindrical portion 20a. An annular mounting groove 25 that is continuous with the lower surface of the flange portion 20b is formed on the upper outer peripheral surface of the cylindrical portion 20a. The packing 23 that is in close contact with the seal surface 19 is mounted in the mounting groove 25. A teaser 26 (see FIGS. 2 and 3) is connected to the center of the ceiling of the cap shell 22 to prevent the tank cap C removed from the fuel filler cylinder 18 from dropping off.

図４及び図５に示すように，キャップインナは，キャップボディ２０の直上に配置される。これらキャップインナ２１及びキャップボディ２０は，これらの対向面にそれぞれ形成された環状の連結鉤形部２７と環状配列の複数の連結爪部２８，２８…との係合により相互に回動可能に連結される。環状の連結鉤形部２７は，キャップボディ２０と同軸上に配置される。キャップインナ２１は，その外周に星形に突出すると共に，先端部を下方に屈曲した複数の突起２１ａ，２１ａ…を備えている。このキャップインナ２１の外周に，天井付きで円筒状の前記キャップシェル２２が嵌合される。このキャップシェル２２の外周面には，キャップインナ２１の複数の突起２１ａ，２１ａ…を内側に受容する複数の隆起部３０，３０…が一体に形成されており，これら隆起部３０，３０…から切り起こされた係止爪３１，３１…を，前記突起２１ａ，２１ａ…外面の凹部３２，３２…に係合させることにより，キャップシェル２２はキャップインナ２１に固着される。上記隆起部３０，３０…は，キャップシェル２２を回転操作する際の滑り止めとなる。   As shown in FIGS. 4 and 5, the cap inner is disposed immediately above the cap body 20. The cap inner 21 and the cap body 20 are rotatable relative to each other by engagement between an annular connecting hook portion 27 formed on each of the opposed surfaces and a plurality of connecting claws 28, 28. Connected. The annular connecting hook portion 27 is arranged coaxially with the cap body 20. The cap inner 21 is provided with a plurality of protrusions 21a, 21a,. The cylindrical cap shell 22 with a ceiling is fitted on the outer periphery of the cap inner 21. On the outer peripheral surface of the cap shell 22, a plurality of raised portions 30, 30... For receiving the plurality of protrusions 21 a, 21 a. The cap shell 22 is fixed to the cap inner 21 by engaging the cut claws 31, 31... With the protrusions 21 a, 21 a. The raised portions 30, 30... Serve as a slip stopper when the cap shell 22 is rotated.

こゝで，キャップボディ２０を給油口筒１８にねじ込むときのキャップシェル２２及びキャップインナ２１の回転方向をＡ，それと反対の回転方向をＢとし，キャップインナ２１のＡ方向の回転を規定のトルクの範囲内でキャップボディ２０に伝達し，キャップインナ２１のＢ方向の回転は滑りなくキャップボディ２０に伝達し得るラチェット機構３５がキャップインナ２１及びキャップボディ２０間に介装される。   Here, when the cap body 20 is screwed into the filler cylinder 18, the rotation direction of the cap shell 22 and the cap inner 21 is A, the opposite rotation direction is B, and the rotation of the cap inner 21 in the A direction is a specified torque. The ratchet mechanism 35 is interposed between the cap inner 21 and the cap body 20 so that the rotation in the B direction of the cap inner 21 can be transmitted to the cap body 20 without slipping.

即ち，このラチェット機構３５は，図６に示すように，キャップボディ２０に形成されて前記連結鉤形部２７の内側にそれと同心上に配置されるラチェットギヤ３６と，キャップインナ２１に一体に形成されて上記ラチェットギヤ３６に弾発的に係合する複数のラチェットポール３７，３７…とからなっており，キャップシェル２２及びキャップインナ２１をＡ方向に回転したときは，その回転トルクが，前記パッキン２３を給油口筒１８のシール面１９に適正に密着させるに足る規定トルクを超えると，ラチェットポール３７，３７…がラチェットギヤ３６から滑り出し，これと反対にキャップシェル２２及びキャップインナ２１をＢ方向に回転したときは，ラチェットポール３７，３７…及びラチェットギヤ３６間に滑りは起こらず，キャップインナ２１及びキャップボディ２０が一体となって回転するようになっている。   That is, as shown in FIG. 6, the ratchet mechanism 35 is formed integrally with the cap inner 21 and the ratchet gear 36 formed on the cap body 20 and arranged concentrically with the inner side of the connecting rod-shaped portion 27. And a plurality of ratchet poles 37, 37,... Which are elastically engaged with the ratchet gear 36. When the cap shell 22 and the cap inner 21 are rotated in the A direction, the rotational torque is When the torque exceeds a specified torque sufficient to properly bring the packing 23 into close contact with the sealing surface 19 of the filler cylinder 18, the ratchet poles 37, 37... When rotating in the direction, no slip occurs between the ratchet poles 37, 37... And the ratchet gear 36. Ppuin'na 21 and the cap body 20 is adapted to rotate integrally.

図４に明示するように，前記パッキン２３は，給油口筒１８の前記シール面１９に密接する環状の下部リップ２３ａと，この下部リップ２３ａの上方でキャップボディ２０の前記フランジ部２０ｂ下面に密接する環状の上部リップ２３ｂと，この両リップ２３ａ，２３ｂの内周端部を相互に一体に連結してキャップボディ２０の前記取り付け溝２５に装着される連結部２３ｃとで構成される。その際，両リップ２３ａ，２３ｂの何れか一方，図示例では上部リップ２３ｂの外周には，キャップシェル２２の周壁２２ａの，隆起部３０，３０…を除く内周面に弾性的に接触する複数の弾性接片３８，３８…が一体に形成され，ラチェット機構３５の滑り作用によりキャップシェル２２及びキャップボディ２０間に相対回転が生じたときは，各弾性接片３８，３８…はキャップシェル２２の内周面をスムーズに滑るように一定方向に傾斜している。また複数の弾性接片３８，３８…及び前記隆起部３０，３０…は，タンクキャップＣの軸線周りに等ピッチに配列されるが，弾性接片３８，３８…及び前記隆起部３０，３０…の配列個数を異ならせて，それぞれのピッチを相違させている。これにより，キャップシェル２２及びキャップボディ２０の如何なる相対回転位置においても，複数の弾性接片３８，３８…の何れかが，キャップシェル２２の，複数の隆起部３０，３０…を除く内周面に常に接触するようになっている。   As clearly shown in FIG. 4, the packing 23 is in close contact with the lower surface of the flange portion 20 b of the cap body 20 above the lower lip 23 a and an annular lower lip 23 a that is in close contact with the sealing surface 19 of the filler cylinder 18. An annular upper lip 23b and an inner peripheral end portion of both lips 23a, 23b are integrally connected to each other and connected to the mounting groove 25 of the cap body 20. At that time, either one of the lips 23a, 23b, in the illustrated example, the outer periphery of the upper lip 23b has a plurality of elastic contacts with the inner peripheral surface of the peripheral wall 22a of the cap shell 22 excluding the raised portions 30, 30. Are integrally formed, and when the relative rotation occurs between the cap shell 22 and the cap body 20 by the sliding action of the ratchet mechanism 35, the elastic contact pieces 38, 38. It is inclined in a certain direction so that it can slide smoothly on the inner peripheral surface. The plurality of elastic contact pieces 38, 38... And the raised portions 30, 30... Are arranged at an equal pitch around the axis of the tank cap C, but the elastic contact pieces 38, 38. The pitch of each is made different by varying the number of arrangements. Thus, at any relative rotational position of the cap shell 22 and the cap body 20, any of the plurality of elastic contact pieces 38, 38... Excludes the plurality of raised portions 30, 30. Is always in contact with.

上記パッキン２３は導電性弾性材料，例えば天然ゴムに塩化ビニール及びカーボンを練り込んでなる材料で成形される。その際，パッキン２３の体積固有抵抗率は１０4 〜１０10Ωに設定することが望ましい。 The packing 23 is formed of a conductive elastic material, for example, a material obtained by kneading vinyl chloride and carbon into natural rubber. At that time, the volume resistivity of the packing 23 is preferably set to 10 4 to 10 10 Ω.

次に，この実施例の作用について説明する。   Next, the operation of this embodiment will be described.

タンクキャップＣの給油口筒１８への装着状態では，導電性のキャップボディ２０が金属製燃料タンクＴの給油口筒１８に螺合すると共に，このキャップボディ２０に取り付けられた導電性のパッキン２３が給油口筒１８のシール面１９に密接し，このパッキン２３の弾性接片３８，３８…が金属製のキャップシェル２２に接触しているから，キャップシェル２２がパッキン２３を介して燃料タンクＴに電気的にアースされた状態にある。したがって，燃料タンクＴ内に燃料を補給すべく作業者がキャップシェル２２を把持したとき，その作業者が静電気を帯電していれば，その静電気はパッキン２３を通して燃料タンクＴに逃げることになる。   When the tank cap C is attached to the fuel filler cylinder 18, the conductive cap body 20 is screwed into the fuel filler cylinder 18 of the metal fuel tank T and the conductive packing 23 attached to the cap body 20. Are in close contact with the sealing surface 19 of the filler cylinder 18 and the elastic contact pieces 38, 38... Of the packing 23 are in contact with the metal cap shell 22, so that the cap shell 22 is connected to the fuel tank T via the packing 23. Is electrically grounded. Therefore, when the worker holds the cap shell 22 to replenish the fuel into the fuel tank T, if the worker is charged with static electricity, the static electricity will escape to the fuel tank T through the packing 23.

このように，キャップシェル２２を金属製とすると共に，このキャップシェル２２に接触する弾性接片３８，３８…付きのパッキン２３を導電性に構成するという極めて簡単な構造により，作業者の静電気を燃料タンクに逃がすことができ，しかもパッキン２３の弾性接片３８，３８…には高度の寸法精度は不要であるから，パッキン２３の製造も容易である。その上，合成樹脂製のキャップボディ２０へのねじ部２４の形成は容易であり，また金属製のキャップシェル２２は製作が容易であると共に耐衝撃性が高いから，生産性及び耐久性の高いタンクキャップＣを安価に提供し得る。   As described above, the cap shell 22 is made of metal, and the static electricity of the operator is reduced by an extremely simple structure in which the packing 23 with the elastic contact pieces 38, 38,. Since the elastic contact pieces 38, 38... Of the packing 23 do not require a high degree of dimensional accuracy, the packing 23 can be easily manufactured. In addition, the threaded portion 24 can be easily formed on the cap body 20 made of synthetic resin, and the metal cap shell 22 is easy to manufacture and has high impact resistance, so that the productivity and durability are high. The tank cap C can be provided at low cost.

またキャップボディ２０とキャップシェル２２とを相互に回転可能に連結する共に，これらキャップシェル２２及びキャップボディ２０間に，キャップシェル２２の前記ねじ部２４に対する締め付け方向Ａの回転トルクが所定値を超えると空転するラチェット機構３５を介装し，パッキン２３の外周に，キャップシェル２２の円筒状周壁２２ａの内周面に弾性的に摺接する弾性接片３８，３８…を一体に突設したので，キャップボディ２０の給油口筒１８への螺合，締め付け時，ラチェット機構３５の空転により過剰締め付けによるねじ部２４やパッキン２３の破損を防ぐことができる。またラチェット機構３５の空転時でも，パッキン２３の弾性接片３８，３８…がキャップシェル２２の内周面を滑ることで，キャップシェル２２の弾性接片３８，３８…との接触状態を保ちつゝ，パッキン２３の無理な変形を防ぐことができる。   In addition, the cap body 20 and the cap shell 22 are rotatably connected to each other, and the rotational torque in the tightening direction A with respect to the screw portion 24 of the cap shell 22 exceeds a predetermined value between the cap shell 22 and the cap body 20. The elastic contact pieces 38, 38... That protrude elastically in sliding contact with the inner peripheral surface of the cylindrical peripheral wall 22 a of the cap shell 22 are integrally provided on the outer periphery of the packing 23. During screwing and tightening of the cap body 20 to the fuel filler cylinder 18, the ratchet mechanism 35 idles to prevent damage to the screw portion 24 and the packing 23 due to excessive tightening. Further, even when the ratchet mechanism 35 is idling, the elastic contact pieces 38, 38... Of the packing 23 slide on the inner peripheral surface of the cap shell 22, so that the contact state with the elastic contact pieces 38, 38. It is possible to prevent excessive deformation of the packing 23.

さらにキャップシェル２２の円筒状周壁２２ａに，外方に隆起して等ピッチに並ぶ複数の滑り止め用隆起部３０，３０…を形成する一方，パッキン２３の前記弾性接片３８，３８…を，前記隆起部３０，３０…のピッチとは異なるピッチで並ぶ複数とし，これら弾性接片３８，３８…の少なくとも一つがキャップシェル２２の円筒状周壁２２ａの，前記隆起部３０，３０…に対応する部分を除く内周面に常に接触するようにしたので，キャップシェル２２の円筒状周壁２２ａに，外方に隆起して等ピッチに並ぶ複数の滑り止め用隆起部３０，３０…が存在しても，これら隆起部３０，３０…に関係なく，またキャップシェル２２及びキャップボディ２０の相対回転位置に関係なく，常に確実にパッキン２３の弾性接片３８，３８…のキャップシェル２２との接触状態を確保し，キャップシェル２２のの燃料タンクＴへのアース状態を保証することができる。   Further, the cylindrical peripheral wall 22a of the cap shell 22 is formed with a plurality of anti-slip ridges 30, 30... Protruding outward and arranged at an equal pitch, while the elastic contact pieces 38, 38. The plurality of the elastic contact pieces 38, 38... Correspond to the raised portions 30, 30... Of the cylindrical peripheral wall 22 a of the cap shell 22. Since it is always in contact with the inner peripheral surface excluding the portion, the cylindrical peripheral wall 22a of the cap shell 22 has a plurality of anti-slip raised portions 30, 30. However, the caps of the elastic contact pieces 38, 38,... Of the packing 23 are always reliably irrespective of the raised portions 30, 30,... And regardless of the relative rotational positions of the cap shell 22 and the cap body 20. Securing the contact state between the E le 22, it is possible to ensure the ground state to the fuel tank T of the cap shell 22.

さらにまたパッキン２３を，給油口筒１８のシール面１９に密接する環状の下部リップ２３ａと，この下部リップ２３ａの上方でキャップボディ２０のフランジ部２０ｂ下面に密接する上部リップ２３ｂと，この両リップ２３ａ，２３ｂの内周端を相互に一体に連結してキャップボディ２０の外周面の環状の取り付け溝２５に装着される連結部２３ｃとで構成し，上記両リップ２３ａ，２３ｂの何れか一方の外周から前記弾性接片３８，３８…を突出させたので，パッキン２３の上部リップ２３ｂ又は下部リップ２３ａを利用して，柔軟性に富む弾性接片３８，３８…を容易に形成することができ，したがって弾性接片３８，３８…付きのパッキン２３を安価に得ることができる。   Furthermore, the packing 23 has an annular lower lip 23a that is in close contact with the sealing surface 19 of the filler cylinder 18, an upper lip 23b that is in close contact with the lower surface of the flange portion 20b of the cap body 20 above the lower lip 23a, and both lips. The inner peripheral ends of 23a and 23b are integrally connected to each other, and the connecting portion 23c is attached to the annular mounting groove 25 on the outer peripheral surface of the cap body 20. Since the elastic contact pieces 38, 38... Protrude from the outer periphery, the flexible elastic contact pieces 38, 38... Can be easily formed using the upper lip 23b or the lower lip 23a of the packing 23. Therefore, the packing 23 with the elastic contact pieces 38, 38... Can be obtained at low cost.

一方，燃料タンクＴにおいては，上部タンク半体７をカラー鋼板製とし，この上部タンク半体７に非塗装鋼板製の給油口筒１８を，その上部が露出するように，かしめ結合すると共に，この給油口筒１８の上方露出面をシール面１９に形成したので，上部タンク半体７の美観を良好にすることができると共に，上部タンク半体７表面の塗膜の万一の剥離に関係なく給油口筒１８のシール面１９を長期に亙り良好に保つことができる。しかも上部タンク半体７への給油口筒１８の結合後には，塗装やマスキング等の面倒な工程は不要であるから，生産性の向上を図ることができる。また溶接による結合とは異なり，上部タンク半体７表面の塗膜の焼損や給油口筒１８のシール面１９の熱変形の心配がなく，しかも，かしめ結合部によりシール面１９の剛性を効果的に高めることができる。したがって上部タンク半体７の美観の確保と，シール面１９の耐久性の向上とを両立させることができる。   On the other hand, in the fuel tank T, the upper tank half 7 is made of a color steel plate, and an oil tank 18 made of unpainted steel plate is caulked and joined to the upper tank half 7 so that the upper portion is exposed, Since the upper exposed surface of the fuel filler cylinder 18 is formed on the seal surface 19, the aesthetic appearance of the upper tank half 7 can be improved and the film on the surface of the upper tank half 7 can be peeled off. Therefore, the sealing surface 19 of the fuel filler cylinder 18 can be maintained well over a long period of time. In addition, since the troublesome processes such as painting and masking are not required after the fuel filler cylinder 18 is coupled to the upper tank half 7, productivity can be improved. Also, unlike the connection by welding, there is no fear of burning of the coating film on the surface of the upper tank half 7 or thermal deformation of the seal surface 19 of the fuel filler cylinder 18, and the rigidity of the seal surface 19 is effectively improved by the caulking connection portion. Can be increased. Therefore, it is possible to achieve both of ensuring the aesthetics of the upper tank half 7 and improving the durability of the seal surface 19.

また上記シール面１９を漏斗状に形成したので，燃料タンクＴへの給油中，シール面１９に燃料が付着したとき，その燃料を漏斗状のシール面１９に沿って燃料タンクＴ内に自然に流入させることができ，これにより燃料による燃料タンクＴ上面の汚損を防ぐことができる。   Further, since the sealing surface 19 is formed in a funnel shape, when fuel adheres to the sealing surface 19 during refueling to the fuel tank T, the fuel naturally flows along the funnel-shaped sealing surface 19 into the fuel tank T. It is possible to prevent the fuel tank T from being polluted by the fuel.

さらに給油口筒１８をメッキ鋼板製としたので，給油口筒１８を，そのメッキ層を剥離することなく上部タンク半体７にかしめ結合することができると共に，メッキ層によりシール面１９を良好にすると共に，その耐久性の更なる向上を図ることができる。   Further, since the fuel filler cylinder 18 is made of a plated steel plate, the oil filler cylinder 18 can be caulked and bonded to the upper tank half 7 without peeling off the plating layer, and the sealing surface 19 can be improved by the plating layer. In addition, the durability can be further improved.

尚，本発明は前記実施例に限定されるものではなく，その要旨を逸脱しない範囲で種々の設計変更が可能である。例えば，燃料タンクＴにおいて，下部タンク半体８の下面を覆う底板９を設けない場合には，下部タンク半体８が外部に露出することになるから，その美観を保つべく，それも上部タンク半体７と同様にカラー鋼板製とする。   The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. For example, in the fuel tank T, when the bottom plate 9 that covers the lower surface of the lower tank half 8 is not provided, the lower tank half 8 is exposed to the outside. Like the half 7, it is made of a colored steel plate.

本発明の実施例に係る汎用エンジンの正面図。The front view of the general purpose engine which concerns on the Example of this invention. 同エンジンに取り付けられた燃料タンクの縦断面図。The longitudinal cross-sectional view of the fuel tank attached to the engine. 図２の３部拡大図。FIG. 3 is an enlarged view of part 3 of FIG. 2. 図３の４部拡大図。FIG. 4 is an enlarged view of part 4 of FIG. 3. 図３の５−５線断面図。FIG. 5 is a sectional view taken along line 5-5 of FIG. 図３の６−６線断面図。FIG. 6 is a sectional view taken along line 6-6 of FIG.

符号の説明Explanation of symbols

Ｃ・・・・・タンクキャップ
Ｔ・・・・・燃料タンク
７・・・・・上部タンク半体
１８・・・・給油口筒
１９・・・・シール面
２３・・・・パッキン C ... Tank cap T ... Fuel tank 7 ... Upper tank half 18 ... Filler cylinder 19 ... Seal surface 23 ... Packing

Claims (4)

タンク天井部に，それを貫通してタンクキャップ（Ｃ）により閉鎖される給油口筒（１８）を結合し，この給油口筒（１８）の上端面に，タンクキャップ（Ｃ）のパッキン（２３）が密接する環状のシール面（１９）を形成した燃料タンクにおいて，
前記タンク上部を構成する少なくとも上部タンク半体（７）を，表面に予め塗装を施したカラー鋼板製とし，この上部タンク半体（７）に非塗装鋼板製の給油口筒（１８）を結合したことを特徴とする燃料タンク。 An oil filler cylinder (18) that passes through the tank ceiling and is closed by a tank cap (C) is connected to the tank ceiling, and a packing (23 of the tank cap (C) is attached to the upper end surface of the oil filler cylinder (18). In a fuel tank formed with an annular sealing surface (19) in close contact with
At least the upper tank half (7) constituting the upper part of the tank is made of a colored steel plate whose surface has been pre-coated, and an oil tank (18) made of unpainted steel plate is coupled to the upper tank half (7). A fuel tank characterized by 請求項１記載の燃料タンクにおいて，
上部タンク半体（７）と給油口筒（１８）とを，給油口筒（１８）の上部が露出するように，かしめ結合すると共に，この給油口筒（１８）の上方露出面を前記シール面（１９）に形成したことを特徴とする燃料タンク。 The fuel tank according to claim 1, wherein
The upper tank half (7) and the filler cylinder (18) are caulked and joined so that the upper part of the filler cylinder (18) is exposed, and the upper exposed surface of the filler cylinder (18) is sealed with the seal. A fuel tank formed on the surface (19). 請求項１又は２記載の燃料タンクにおいて，
前記シール面（１９）を漏斗状に形成したことを特徴とする燃料タンク。 The fuel tank according to claim 1 or 2,
A fuel tank, wherein the sealing surface (19) is formed in a funnel shape. 請求項２又は３記載の燃料タンクにおいて，
給油口筒（１８）をメッキ鋼板製としたことを特徴とする燃料タンク。
The fuel tank according to claim 2 or 3,
A fuel tank characterized in that the fuel filler tube (18) is made of a plated steel plate.
JP2005183598A 2005-06-23 2005-06-23 Fuel tank Expired - Fee Related JP4395107B2 (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
JP2005183598A JP4395107B2 (en) 2005-06-23 2005-06-23 Fuel tank
TW095119997A TWI312388B (en) 2005-06-23 2006-06-06 Fuel tank
MYPI20062833A MY142134A (en) 2005-06-23 2006-06-15 Fuel tank
PE2006000692A PE20070127A1 (en) 2005-06-23 2006-06-21 FUEL TANK
ARP060102681A AR057392A1 (en) 2005-06-23 2006-06-22 FUEL TANK
PCT/JP2006/312613 WO2006137524A1 (en) 2005-06-23 2006-06-23 Fuel tank
KR1020077026537A KR100933253B1 (en) 2005-06-23 2006-06-23 Fuel tank
DE602006021573T DE602006021573D1 (en) 2005-06-23 2006-06-23 FUEL TANK
CA2769741A CA2769741C (en) 2005-06-23 2006-06-23 Fuel tank
AU2006260111A AU2006260111B2 (en) 2005-06-23 2006-06-23 Fuel tank
NZ562776A NZ562776A (en) 2005-06-23 2006-06-23 Fuel tank
CN200680020854XA CN101193801B (en) 2005-06-23 2006-06-23 Fuel tank
BRPI0611270-6A BRPI0611270B1 (en) 2005-06-23 2006-06-23 FUEL TANK
CA2605647A CA2605647C (en) 2005-06-23 2006-06-23 Fuel tank
EP06780650A EP1902966B1 (en) 2005-06-23 2006-06-23 Fuel tank
US11/919,560 US9162564B2 (en) 2005-06-23 2006-06-23 Fuel tank
PA20068682201A PA8682201A1 (en) 2005-06-23 2006-06-23 FUEL TANK

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005183598A JP4395107B2 (en) 2005-06-23 2005-06-23 Fuel tank

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Publication Number Publication Date
JP2007002741A true JP2007002741A (en) 2007-01-11
JP4395107B2 JP4395107B2 (en) 2010-01-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014094718A (en) * 2012-11-12 2014-05-22 Keylex Corp Fuel filler tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014094718A (en) * 2012-11-12 2014-05-22 Keylex Corp Fuel filler tube

Also Published As

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