JP2005014700A - Structure for mounting lid body of closed container - Google Patents

Structure for mounting lid body of closed container Download PDF

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Publication number
JP2005014700A
JP2005014700A JP2003180860A JP2003180860A JP2005014700A JP 2005014700 A JP2005014700 A JP 2005014700A JP 2003180860 A JP2003180860 A JP 2003180860A JP 2003180860 A JP2003180860 A JP 2003180860A JP 2005014700 A JP2005014700 A JP 2005014700A
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JP
Japan
Prior art keywords
fuel tank
lid
hole
mounting
sealed container
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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.)
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JP2003180860A
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Japanese (ja)
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JP4081409B2 (en
Inventor
Kazuhiro Nakamura
和広 中村
Shinya Murabayashi
真也 村林
Naomasa Kaneko
直正 金子
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Yachiyo Industry Co Ltd
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Honda Motor Co Ltd
Yachiyo Industry Co Ltd
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Application filed by Honda Motor Co Ltd, Yachiyo Industry Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP2003180860A priority Critical patent/JP4081409B2/en
Priority to EP03777291A priority patent/EP1591370B1/en
Priority to CA002508734A priority patent/CA2508734C/en
Priority to US10/537,640 priority patent/US20070062841A1/en
Priority to PCT/JP2003/015599 priority patent/WO2004052743A1/en
Priority to DE60313221T priority patent/DE60313221T2/en
Publication of JP2005014700A publication Critical patent/JP2005014700A/en
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Publication of JP4081409B2 publication Critical patent/JP4081409B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid body mounting structure of a closed container for improving precision in a submergence type leak test and reducing test time when a space section is generated between a mounting section and a closed container body by fixing the mounting section for mounting the lid body of the closed container used for a fuel tank for automobiles, or the like, to a support section. <P>SOLUTION: The structure for mounting the lid body of the fuel tank 1 comprises the support section 6 that is fixed onto an outer wall surface 2a in the fuel tank body 2 so that an opening 3 of the fuel tank body 2 is surrounded; and the mounting section 9 that is formed to mount the lid body 4 to the fuel tank body 2 by pressing the lid body 4 for blocking the opening 3 from the outside for fixing for bridging over the support section 6. By fixing the mounting section 9 to the support section 6, a through hole 7 and a through hole 11 for connecting the space section 14 formed at the side of the fuel tank body 2 of the mounting section 9 to the outside are provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、自動車用燃料タンク等の密閉容器に設けられた開口部を閉塞する蓋体を備えた密閉容器の蓋体取付構造に関する。
【0002】
【従来の技術】
容器の一面に開口部を備え、その開口部を蓋体により閉塞する密閉容器は、例えば、自動車用燃料タンク等に使用されている。この自動車用燃料タンクの一例を示す概略斜視図を図4(a)に示す。図4(a)に示すように、燃料タンク40は蓋体41と燃料給油管に接続する接続口42とを備えている。また、図4(a)のC−C線の縦断面図である図4(b)に示すように、燃料タンク本体43の上部には、ポンプモジュール44を組み込むための開口部45が設けられ、この開口部45は蓋体41により閉塞されている。また、蓋体41にはポンプモジュール44と接続され、ポンプモジュール44から供給される燃料を自動車のエンジンに供給する燃料供給通路46や、エンジンからの余剰燃料が還流する燃料戻し通路47等が一体的に固定されている。
【0003】
従来、自動車用燃料タンク等の密閉容器の蓋体取付構造に関し、密閉容器本体の開口部に蓋体を取り付けるための取付部と、この取付部を固定する支持部を設けた構造が知られており、例えば、図4(b)のD部の拡大図である図5に示すような構造が特許文献1に記載されている。図5に示すように、燃料タンク本体43と蓋体41との間には環状のシール48が配設されており、このシール48は内周側に燃料漏れ防止部48aを有すると共に、外周側に防水部48bを有している。そして、蓋体41を取付部49の内周部49aによって外側から押さえながら、フランジ50aを持つボルト50で、取付部49の外周部49bを支持部51に固定することにより、蓋体41を燃料タンク本体43に取り付けている。
【0004】
一方、前記したような蓋体取付構造を有する密閉容器について、例えば、自動車用燃料タンクに使用する場合は、シール状態を確認するため、図6に示すような水没式リークテストを行う場合がある。このリークテストは、まず、燃料供給通路46および燃料戻し通路47を盲治具53、53によって塞ぐと共に、接続口42に加圧用差し込み治具54を設け、更に、加圧用差し込み治具54と圧力調整機55との間を配管56により接続した後、燃料タンク40を、水が収容された水槽57内に浸漬する。続いて、圧力調整機55で調圧された空気を矢印E方向に流すことによって、空気を燃料タンク本体43内に導入し、燃料タンク本体43内を所定の圧力まで加圧する。
【0005】
そして、燃料タンク40内にリークがある場合には、この燃料タンク40のリーク部分から発生する気泡が水の中をその体積を拡大しながら上昇するので、この気泡を矢印F方向から目視で確認することによって、燃料タンク40内のリーク部分の有無を検査することができる。
【0006】
【特許文献1】
特開2003−72824号公報(段落番号[0003]〜[0004]、図5)
【0007】
【発明が解決しようとする課題】
しかし、図5に示すように、この蓋体取付構造では、取付部49を支持部51に固定することによって、閉鎖された空間部52が生じるため、この空間部52の空気に起因する気泡を、燃料タンク本体43の内部から発生した気泡と誤診する可能性がある。
また、そのような誤診を避けるためには、燃料タンク40を水槽57内に浸漬した段階で、調圧された空気を導入する前に、部品固定部の微小な隙間、例えば、図5の取付部49と蓋体41との間58から漏れて流入する水によって、空間部52が水で充満するまで放置しなければならず、テストに長時間を要する。更に、この場合も、空間部52に存在していた空気が抜けきらない場合は、テスト時に、空間部52の空気に起因する気泡が発生する可能性があり、誤診のおそれは免れない。
【0008】
本発明は、このような問題に鑑みてなされたものであって、密閉容器の蓋体を取り付けるための取付部を支持部に固定することによって、取付部と密閉容器本体との間に空間部が生じた場合に、水没式リークテストの精度向上およびテスト時間の短縮が可能となる密閉容器の蓋体取付構造を提供することを課題とする。
【0009】
【課題を解決するための手段】
前記課題を解決した本発明のうちの請求項1に記載された発明は、密閉容器に設けられた開口部を閉塞する蓋体を備えた密閉容器の蓋体取付構造であって、前記開口部を囲うようにして前記密閉容器本体の外壁面上に固定された支持部と、前記蓋体を外側から押さえながら、前記支持部に架け渡すようにして固定することで、前記蓋体を前記密閉容器本体に取り付けるように形成された取付部とを備え、前記取付部を前記支持部に固定することにより、前記取付部の前記密閉容器本体側に形成された空間部と外部とを繋ぐ貫通孔を設けたことを特徴とする。
【0010】
請求項1のような密閉容器の蓋体取付構造では、水没式リークテストにおいて、密閉容器を水槽に浸漬する際、前記貫通孔から水が流入することによって、短時間で前記空間部が水で満たされる。従って、水槽内に密閉容器を浸漬してから、調圧された空気を導入するまでに時間を要しないため、テスト時間の短縮化が図られる。また、前記貫通孔から空気が排出するため、テスト中に前記空間部の空気に起因する気泡が発生せず、前記したような誤診も生じない。これにより、水没式リークテストの精度向上が図られる。
【0011】
また、請求項2に記載された発明は、請求項1に記載の密閉容器の蓋体取付構造において、前記貫通孔を、前記取付部に設けたことを特徴とする。
【0012】
請求項2のような密閉容器の蓋体取付構造では、密閉容器の底面側を下方、蓋体側を上方とした場合に、前記貫通孔が前記空間部の上方に直結しているため、水没式リークテストにおいて、密閉容器を水槽に浸漬する際、前記空間部に存在していた空気が、前記空間部の上方に直結する貫通孔を通って、より速やかに排出される。従って、テスト中の前記空間部の空気に起因する気泡の発生を確実に防止することができ、水没式リークテストの精度をより一層向上させることができる。
【0013】
また、請求項3に記載された発明は、請求項1又は請求項2に記載の密閉容器の蓋体取付構造において、前記貫通孔を、前記支持部と前記支持部が固定されている前記密閉容器本体の外壁面との間、又は前記取付部と前記支持部との間に設けたことを特徴とする。
【0014】
請求項3のような密閉容器の蓋体取付構造では、前記空間部の下方に直結する貫通孔を備えているため、水没式リークテストを行った後、密閉容器を水槽から引き上げる際、前記空間部内を満たしていた水が、前記貫通孔から速やかに排出される。従って、テスト後の密閉容器の乾燥工程が容易化し、更に、テスト後の残留水による構成部材の腐蝕も防止できる。
また、請求項3のような蓋体取付構造を有する密閉容器を自動車用燃料タンク等に使用した場合において、自動車等の通常使用時に前記密閉容器が浸水したとしても、前記空間部内に侵入した水を前記貫通孔から排水することができるので、通常使用時の浸水による構成部材の腐蝕も防止できる。
更に、前記空間部の下方に直結する貫通孔に加え、前記空間部の上方に直結する貫通孔を備えている場合は、水没式リークテスト後に、水を前記空間部の下方に直結する貫通孔から排出する際、前記空間部の上方に直結する貫通孔から流入する空気の気圧により、前記空間部内の水が押され、より速やかに水を排出することができる。従って、テスト後の密閉容器の乾燥工程がより一層容易化し、テスト後の残留水による構成部材の腐蝕もより確実に防止できる。また、同様の理由により、密閉容器の通常使用時の浸水による構成部材の腐蝕もより確実に防止できる。
【0015】
【発明の実施の形態】
次に、本発明の第1の実施形態に係る密閉容器の蓋体取付構造について、適宜図面を参照して説明する。なお、位置、方向を表す表現は、密閉容器の通常使用状態を基準とする。
【0016】
参照する図1は、本発明の第1の実施形態に係る密閉容器を、自動車用燃料タンクに使用した場合における密閉容器の蓋体取付構造の分解斜視図である。図2は、図1の構成部品を取り付けた後の蓋体取付構造を示し、(a)が平面図、(b)が(a)におけるA−A線の縦断面図、(c)が(a)におけるB−B線の縦断面図である。なお、図1および図2において、ポンプモジュール等の本発明に直接関係のない構成部品は省略している。
【0017】
まず、図1を用いて、本発明の第1の実施形態に係る燃料タンク1における、蓋体取付構造の構成部品について説明する。なお、燃料タンク1は、特許請求の範囲にいう「密閉容器」に相当する。
燃料タンク1は、燃料タンク本体2の上部に円形の開口部3を有している。そして、開口部3の端部にはフランジ3aが設けられている。また、開口部3を閉塞する蓋体4は円板形状であり、内側に、図示しないポンプモジュールから供給される燃料を自動車のエンジンに供給する燃料供給通路や、エンジンからの余剰燃料が還流する燃料戻し通路等が設けられている。この蓋体4は、燃料タンク本体2に取り付けられたときに、フランジ3aをほぼ覆う径を有している。なおフランジ3aと蓋体4との間にはリング状のシール5を配設するが、このシール5の材料については限定されず、例えば、アクリロニトリル−ブタジエンゴムとポリ塩化ビニルとのブレンド材等から形成されている。
【0018】
そして、開口部3を囲うようにして、燃料タンク本体2の外壁面2a上に、リング状の支持部6が設けられている。この支持部6と、支持部6が固定されている燃料タンク本体2の外壁面2aとの間には、貫通孔7,・・・が周方向にほぼ等間隔で複数箇所設けられている(例えば、本実施形態では8箇所設けられており、うち6箇所が図示されている)。更に、支持部6には、貫通孔7,・・・と重ならない位置に、複数本のボルト8,・・・が周方向にほぼ等間隔で、支持部6に設けられた孔6a,・・・に嵌入されて立設している(例えば、本実施形態では8本設けられている)。なお、支持部6を燃料タンク本体2の外壁面2aに固定する方法は特に限定されず、例えば、溶接等によって固定すれば良い。更に、ボルト8,・・・を支持部6に固定する方法についても特に限定されず、例えば、螺着等によって固定すれば良い。
【0019】
また、リング状の取付部9は、蓋体4に当接する内周部9aと、ボルト8,・・・を挿入するための止め孔9b,・・・を設けた外周部9cとを有し、内周部9aで蓋体4を外から押さえながら、止め孔9b,・・・をボルト8,・・・に係合させ、続いて、外周部9cをボルト8,・・・およびナット10,・・・にて支持部6に固定することによって、蓋体4を燃料タンク本体2に取り付けるように形成されている。また、取付部9の屈曲部9dには、貫通孔11,・・・が周方向にほぼ等間隔で複数箇所設けられている(例えば、本実施形態では8箇所設けられている)。
【0020】
なお、この貫通孔11,・・・は、取付部9を支持部6に固定した状態を取付部9側から見たときに、図2(a)に示すような位置、即ち、蓋体4の中心12と貫通孔7,・・・を結ぶ仮想直線13,・・・上に設けられている。
また、支持部6、取付部9、ボルト8,・・・およびナット10,・・・の形成材料は限定されないが、蓋体4を強固に固定し、更に、固定箇所の変形が少ない点から金属で形成するのが好ましい。更に、水没式リークテスト等で、水に浸漬しても錆びないように、前記金属には、防錆性の金属、例えばステンレス等を用いるのが好ましい。
【0021】
次に、蓋体4の燃料タンク本体2への取付手順について、図1を用いて説明する。
まず、シール5を、開口部3のフランジ3aの上面に載置し、続いて、蓋体4を、シール5上に載置する。更に、蓋体4の外縁部の上面4aを取付部9の内周部9aで押さえながら、取付部9の外周部9cに設けられた止め孔9b,・・・をボルト8,・・・に係合させる。続いて、ボルト8,・・・にナット10,・・・を螺着することによって、蓋体4が燃料タンク本体2に取り付けられる。
【0022】
続いて、本発明の第1の実施形態に係る燃料タンク1の蓋体取付構造について、その作用と効果を、図2を用いて説明する。
前記手順により取り付けた蓋体取付構造を示す図2(a)において、そのA−A線の縦断面図である図2(b)は、取付部9が支持部6に固定されている箇所の縦断面を示す。図2(b)に示すように、取付部9の内周部9aにより、蓋体4の外縁部の上面4aを押さえながら、支持部6に架け渡すようにして、取付部9の外周部9cをボルト8およびナット10にて固定することで、蓋体4が燃料タンク本体2に強固に密着された状態で取り付けられている。
また、蓋体4が燃料タンク本体2に強固に取り付けられると、蓋体4の外縁部の下面4bと、開口部3のフランジ3aの上面3bとの間に挟まれたシール5が押圧されて、強固な密閉性を実現することができる。
【0023】
次に、図2(a)のB−B線の縦断面図である図2(c)を用いて説明する。図2(c)は貫通孔7および貫通孔11の縦断面を示す。貫通孔7は、支持部6と支持部6が固定されている燃料タンク本体2の外壁面2aとの間に設けられ、貫通孔11は取付部9の屈曲部9dに設けられている。これにより、水没式リークテストにおいて、前記手順により蓋体4が取り付けられた燃料タンク1を、水槽に浸漬する際、貫通孔7又は貫通孔11から水が流入し、空間部14が速やかに水で満たされる。従って、燃料タンク1を水槽内に浸漬してから、調圧された空気を導入するまでに時間を要しないため、テスト時間の短縮化が図られる。また、貫通孔11が、空間部14の上方に直結して設けられているため、燃料タンク1を水槽に浸漬する際、空間部14に存在していた空気が、貫通孔11から速やかに排出される。その結果、テスト中の空間部14の空気に起因する気泡の発生を確実に防止することができ、水没式リークテストの精度を向上させることができる。
【0024】
また、貫通孔7が、支持部6と支持部6が固定されている燃料タンク本体2の外壁面2aとの間に設けられているため、貫通孔7が空間部14の下方と直結している。これにより、水没式リークテストを行った後、燃料タンク1を水槽から引き上げる際、空間部14内を満たしていた水が、速やかに貫通孔7から排出される。更に、貫通孔11が空間部14の上方に直結して設けられているため、水を貫通孔7から排出する際、貫通孔11から流入する空気の気圧により、空間部14内の水が押され、より速やかに水を排出することができる。従って、テスト後の燃料タンク1の乾燥工程が容易化し、更に、テスト後の残留水による構成部材の腐蝕も防止できる。
【0025】
次に、本発明の第2の実施形態に係る燃料タンク20の蓋体取付構造について、適宜図面を参照して説明する。なお、燃料タンク20は、特許請求の範囲にいう「密閉容器」に相当する。
【0026】
参照する図3(a)および図3(b)は、第1の実施形態で説明した図2(b)および図2(c)に相当し、図3(a)は取付部と支持部とが固定されている箇所の縦断面図、図3(b)は貫通孔の縦断面図である。
【0027】
図3(a)に示すように、樹脂製の燃料タンク20は、燃料タンク本体21の外壁面21aに設けた溝部21bに、ボルト22が周方向にほぼ等間隔で立設された状態で、支持部23がインサート成形されている。そして、取付部24の内周部24aにより、蓋体25の外縁部の上面25aを押さえながら、取付部24の止め孔24bをボルト22に係合させ、ナット26にて固定することで、蓋体25が燃料タンク本体21に強固に密着された状態で取り付けられている。
【0028】
また、蓋体25が燃料タンク本体21に強固に取り付けられると、蓋体25の外縁部の下面25bと、開口部27のフランジ27aの上面27bとの間に挟まれたシール28が押圧されて、強固な密閉性を実現することができる。
【0029】
また、図3(b)に示すように、燃料タンク20は、貫通孔29および貫通孔30を備えている。貫通孔29は、取付部24と支持部23との間に設けられ、貫通孔30は取付部24の屈曲部24cに設けられている。これにより、燃料タンク20は、空間部31の下方に直結する貫通孔29を有し、更に、空間部31の上方に直結する貫通孔30を有しているため、第1の実施形態と同様の効果を発揮することができる。
【0030】
更に、支持部23は、溝部21bにインサート成形されているため、燃料タンク本体21と強固に結合している。その結果、燃料タンク20の密閉性が向上する。
また、支持部23は、図3の破線部に示す燃料タンク本体21の熱収縮代32を設けてインサート成形しているので、インサート成形後、樹脂の温度が冷めるにつれて、燃料タンク本体21が図中右方向に熱収縮することにより、溝部21bの壁面21cと、支持部23の外周端面23aとが当接する。これにより、支持部23の取付精度が向上する。なお、燃料タンク本体21の熱収縮により、支持部23の内周壁面23bと燃料タンク本体21との間に、空間部33が生じる。
【0031】
以上、好ましい実施の形態について説明したが、本発明は前記実施の形態に限定されるものではない。例えば、取付部を支持部に固定する際、前記実施の形態ではボルトおよびナットを使用したが、取付部の固定方法はこれに限定されるものではなく、蓋体を外側から押さえながら、支持部に架け渡すようにして固定できる方法であれば良い。
また、貫通孔についても、取付部を支持部に固定することによって、前記取付部の密閉容器本体側に形成された空間部と外部とを繋ぐ孔であれば、前記実施の形態には限定されない。
また、前記実施の形態では、密閉容器本体の開口部に設けたフランジと、蓋体との間にリング状のシールを配設したが、本発明はシール手段について、特に限定されない。例えば、シール性を兼ね備えた蓋体を用いることによって、密閉容器本体の開口部を密閉することにより、リークを防止しても良い。
【0032】
【発明の効果】
以上述べたように、本発明に係る密閉容器の蓋体取付構造は、取付部を支持部に固定することにより形成された空間部と外部とを繋ぐ貫通孔を設けたことによって、水没式リークテストにおいて、密閉容器を水槽内に浸漬する際、前記貫通孔から水が速やかに流入し、短時間で前記空間部が水で満たされる。従って、密閉容器を水槽内に浸漬してから、調圧された空気を導入するまでに時間を要しないため、テスト時間の短縮化が図られる。また、前記貫通孔から空間部に存在していた空気が抜けることによって、テスト中の前記空間部の空気に起因する気泡の発生を防止することができるため、水没式リークテストの精度向上が図られる。
【図面の簡単な説明】
【図1】本発明の第1の実施形態に係る密閉容器(自動車用燃料タンク)の蓋体取付構造の分解斜視図である。
【図2】図1の構成部品を取り付けた後の蓋体取付構造であり、(a)が平面図、(b)が(a)におけるA−A線の縦断面図、(c)が(a)におけるB−B線の縦断面図である。
【図3】本発明の第2の実施形態に係る密閉容器(自動車用燃料タンク)の蓋体取付構造であり、(a)は取付部と支持部とが固定されている箇所の縦断面図、(b)は貫通孔の縦断面図である。
【図4】従来の蓋体取付構造を有する密閉容器(自動車用燃料タンク)の概略図であり、(a)が全体斜視図、(b)が(a)におけるC−C線の縦断面図である。
【図5】図4(b)におけるD部の拡大図である。
【図6】水没式のリークテスト方法を示す概略図である。
【符号の説明】
1 燃料タンク
2 燃料タンク本体
2a 燃料タンク本体の外壁面
3 開口部
4 蓋体
6 支持部
7 貫通孔
9 取付部
11 貫通孔
14 空間部
20 燃料タンク
21 燃料タンク本体
21a 燃料タンク本体の外壁面
23 支持部
24 取付部
25 蓋体
27 開口部
29 貫通孔
30 貫通孔
31 空間部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lid mounting structure for a sealed container provided with a lid that closes an opening provided in a sealed container such as an automobile fuel tank.
[0002]
[Prior art]
An airtight container that includes an opening on one surface of the container and closes the opening with a lid is used in, for example, an automobile fuel tank. FIG. 4A is a schematic perspective view showing an example of this automobile fuel tank. As shown in FIG. 4A, the fuel tank 40 includes a lid body 41 and a connection port 42 connected to the fuel supply pipe. Further, as shown in FIG. 4B, which is a longitudinal sectional view taken along the line CC of FIG. 4A, an opening 45 for incorporating the pump module 44 is provided in the upper portion of the fuel tank main body 43. The opening 45 is closed by the lid body 41. The lid body 41 is connected to a pump module 44, and is integrally provided with a fuel supply passage 46 for supplying fuel supplied from the pump module 44 to the engine of the automobile, a fuel return passage 47 for returning surplus fuel from the engine, and the like. Fixed.
[0003]
Conventionally, regarding a lid mounting structure for a sealed container such as a fuel tank for automobiles, a structure in which a mounting section for mounting a lid body on an opening of a sealed container body and a support section for fixing the mounting section is provided is known. For example, Patent Document 1 discloses a structure as shown in FIG. 5 which is an enlarged view of a portion D in FIG. As shown in FIG. 5, an annular seal 48 is disposed between the fuel tank main body 43 and the lid body 41. The seal 48 has a fuel leakage preventing portion 48a on the inner peripheral side, and has an outer peripheral side. Has a waterproof part 48b. Then, the outer periphery 49b of the attachment portion 49 is fixed to the support portion 51 with the bolt 50 having the flange 50a while the cover 41 is pressed from the outside by the inner peripheral portion 49a of the attachment portion 49, so that the cover 41 is fueled. It is attached to the tank body 43.
[0004]
On the other hand, when the sealed container having the lid mounting structure as described above is used, for example, in an automobile fuel tank, a submerged leak test as shown in FIG. 6 may be performed in order to check the sealing state. . In this leak test, first, the fuel supply passage 46 and the fuel return passage 47 are closed by the blind jigs 53, 53, and a press-in insertion jig 54 is provided at the connection port 42. After connecting the regulator 55 with the pipe 56, the fuel tank 40 is immersed in a water tank 57 containing water. Subsequently, the air regulated by the pressure regulator 55 is caused to flow in the direction of arrow E, whereby air is introduced into the fuel tank body 43 and the inside of the fuel tank body 43 is pressurized to a predetermined pressure.
[0005]
If there is a leak in the fuel tank 40, the bubbles generated from the leaked portion of the fuel tank 40 rise in the water while expanding its volume. By doing so, the presence or absence of a leak portion in the fuel tank 40 can be inspected.
[0006]
[Patent Document 1]
JP 2003-72824 A (paragraph numbers [0003] to [0004], FIG. 5)
[0007]
[Problems to be solved by the invention]
However, as shown in FIG. 5, in this lid attachment structure, by fixing the attachment portion 49 to the support portion 51, a closed space portion 52 is generated, so that air bubbles caused by the air in the space portion 52 are removed. There is a possibility of misdiagnosis as bubbles generated from the inside of the fuel tank main body 43.
Further, in order to avoid such misdiagnosis, a small gap in the component fixing portion, for example, the attachment shown in FIG. 5, is introduced before introducing the conditioned air when the fuel tank 40 is immersed in the water tank 57. The water that leaks from the portion 58 and the lid 41 and flows in must be left until the space portion 52 is filled with water, and the test takes a long time. Furthermore, also in this case, if the air existing in the space part 52 cannot be completely removed, bubbles due to the air in the space part 52 may be generated during the test, and the risk of misdiagnosis is unavoidable.
[0008]
This invention is made in view of such a problem, Comprising: By fixing the attaching part for attaching the cover body of an airtight container to a support part, a space part is provided between an attaching part and an airtight container main body. It is an object of the present invention to provide a lid mounting structure for an airtight container that can improve the accuracy of a submerged leak test and shorten the test time in the event of the occurrence of this.
[0009]
[Means for Solving the Problems]
The invention described in claim 1 of the present invention that has solved the above problem is a lid mounting structure for a hermetic container provided with a lid for closing an opening provided in the hermetic container, wherein the opening And a support part fixed on the outer wall surface of the sealed container main body so as to surround the cover body, and the cover body is fixed so as to span the support part while being pressed from the outside. A through hole that connects a space portion formed on the sealed container body side of the mounting portion and the outside by fixing the mounting portion to the support portion. Is provided.
[0010]
In the lid mounting structure for a hermetic container as in claim 1, in the submerged leak test, when the hermetic container is immersed in the water tank, water flows in from the through hole, so that the space portion is watered in a short time. It is filled. Therefore, since no time is required from the immersion of the sealed container in the water tank to the introduction of the regulated air, the test time can be shortened. In addition, since air is discharged from the through hole, bubbles due to the air in the space are not generated during the test, and the above-described misdiagnosis does not occur. This improves the accuracy of the submerged leak test.
[0011]
According to a second aspect of the present invention, in the lid mounting structure for a hermetic container according to the first aspect, the through hole is provided in the mounting portion.
[0012]
In the lid mounting structure for a sealed container as in claim 2, when the bottom surface side of the sealed container is the lower side and the lid side is the upper side, the through hole is directly connected to the upper part of the space portion. In the leak test, when the sealed container is immersed in the water tank, the air present in the space portion is discharged more quickly through the through hole directly connected to the space portion. Therefore, it is possible to reliably prevent the generation of bubbles due to the air in the space under test, and it is possible to further improve the accuracy of the submerged leak test.
[0013]
Further, the invention described in claim 3 is the lid mounting structure of the hermetic container according to claim 1 or 2, wherein the through hole is formed in the hermetic seal in which the support part and the support part are fixed. It is provided between the outer wall surface of the container main body or between the attachment portion and the support portion.
[0014]
In the lid mounting structure for a sealed container as in claim 3, since the through-hole directly connected to the lower portion of the space portion is provided, the space is removed when the sealed container is pulled up from the water tank after performing a submerged leak test. The water that has filled the inside is quickly discharged from the through hole. Therefore, the drying process of the sealed container after the test is facilitated, and further, corrosion of the constituent members due to the residual water after the test can be prevented.
Further, when the sealed container having the lid attachment structure as in claim 3 is used for an automobile fuel tank or the like, even if the sealed container is submerged during normal use of an automobile or the like, the water that has entered the space portion Can be drained from the through-hole, so that corrosion of components due to water immersion during normal use can also be prevented.
Furthermore, in addition to the through-hole directly connected to the lower part of the space part, when the through-hole directly connected to the upper part of the space part is provided, the through-hole to directly connect water to the lower part of the space part after the submerged leak test When discharging from the water, the water in the space is pushed by the atmospheric pressure of the air flowing in from the through hole directly connected to the upper part of the space, and the water can be discharged more quickly. Therefore, the drying process of the sealed container after the test is further facilitated, and the corrosion of the constituent members due to the residual water after the test can be more reliably prevented. In addition, for the same reason, corrosion of components due to water immersion during normal use of the sealed container can be prevented more reliably.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Next, the lid mounting structure for a hermetic container according to the first embodiment of the present invention will be described with reference to the drawings as appropriate. In addition, the expression showing a position and a direction is based on the normal use state of a sealed container.
[0016]
FIG. 1 to be referred to is an exploded perspective view of a lid mounting structure for a hermetic container when the hermetic container according to the first embodiment of the present invention is used in an automobile fuel tank. FIG. 2 shows a lid mounting structure after mounting the components shown in FIG. 1, (a) is a plan view, (b) is a longitudinal sectional view taken along line AA in (a), and (c) is ( It is a longitudinal cross-sectional view of the BB line in a). In FIG. 1 and FIG. 2, components that are not directly related to the present invention such as a pump module are omitted.
[0017]
First, components of the lid mounting structure in the fuel tank 1 according to the first embodiment of the present invention will be described with reference to FIG. The fuel tank 1 corresponds to a “sealed container” in the claims.
The fuel tank 1 has a circular opening 3 at the top of the fuel tank body 2. A flange 3 a is provided at the end of the opening 3. The lid 4 that closes the opening 3 has a disk shape, and a fuel supply passage for supplying fuel supplied from a pump module (not shown) to the engine of the automobile and surplus fuel from the engine circulates inside. A fuel return passage or the like is provided. The lid 4 has a diameter that substantially covers the flange 3 a when attached to the fuel tank body 2. A ring-shaped seal 5 is disposed between the flange 3a and the lid 4. However, the material of the seal 5 is not limited. For example, a blend material of acrylonitrile-butadiene rubber and polyvinyl chloride is used. Is formed.
[0018]
A ring-shaped support 6 is provided on the outer wall surface 2 a of the fuel tank body 2 so as to surround the opening 3. Between this support part 6 and the outer wall surface 2a of the fuel tank body 2 to which the support part 6 is fixed, a plurality of through holes 7,... Are provided at substantially equal intervals in the circumferential direction ( For example, in this embodiment, eight places are provided, of which six places are illustrated. Further, a plurality of bolts 8,... Are formed in the support portion 6 at positions that do not overlap with the through holes 7,. .. is inserted and standing (for example, eight are provided in this embodiment). The method for fixing the support portion 6 to the outer wall surface 2a of the fuel tank body 2 is not particularly limited, and may be fixed by welding or the like, for example. Further, the method for fixing the bolts 8 to the support portion 6 is not particularly limited, and may be fixed by, for example, screwing or the like.
[0019]
Moreover, the ring-shaped attachment part 9 has the inner peripheral part 9a contact | abutted with the cover body 4, and the outer peripheral part 9c which provided the stop hole 9b for inserting the volt | bolt 8, .... While holding the lid 4 from the outside with the inner peripheral portion 9a, the retaining holes 9b,... Are engaged with the bolts 8,. The lid 4 is formed to be attached to the fuel tank main body 2 by being fixed to the support portion 6 with. Further, the bent portion 9d of the attachment portion 9 is provided with a plurality of through holes 11,... At substantially equal intervals in the circumferential direction (for example, in this embodiment, eight locations are provided).
[0020]
The through holes 11,... Are positioned as shown in FIG. 2A when the state in which the attachment portion 9 is fixed to the support portion 6 is viewed from the attachment portion 9 side, that is, the lid 4. Are provided on virtual straight lines 13,...
Moreover, although the formation material of the support part 6, the attachment part 9, the volt | bolt 8, ..., and the nut 10, ... is not limited, From the point which fixes the cover body 4 firmly and also has few deformation | transformation of a fixing location. It is preferable to form with a metal. Furthermore, it is preferable to use a rust-proof metal such as stainless steel as the metal so that it does not rust even when immersed in water in a submerged leak test or the like.
[0021]
Next, a procedure for attaching the lid 4 to the fuel tank body 2 will be described with reference to FIG.
First, the seal 5 is placed on the upper surface of the flange 3 a of the opening 3, and then the lid 4 is placed on the seal 5. Further, while holding the upper surface 4a of the outer edge portion of the lid body 4 with the inner peripheral portion 9a of the attachment portion 9, the retaining holes 9b provided in the outer peripheral portion 9c of the attachment portion 9 are replaced with the bolts 8,. Engage. Subsequently, the lid 4 is attached to the fuel tank body 2 by screwing the nuts 10,.
[0022]
Next, the operation and effect of the lid mounting structure for the fuel tank 1 according to the first embodiment of the present invention will be described with reference to FIG.
In FIG. 2 (a) showing the lid attachment structure attached by the above procedure, FIG. 2 (b), which is a longitudinal sectional view taken along the line AA, shows the location where the attachment portion 9 is fixed to the support portion 6. A longitudinal section is shown. As shown in FIG. 2B, the outer peripheral portion 9 c of the mounting portion 9 is bridged to the support portion 6 while pressing the upper surface 4 a of the outer edge portion of the lid body 4 by the inner peripheral portion 9 a of the mounting portion 9. Is fixed with bolts 8 and nuts 10, so that the lid body 4 is attached in a state of being firmly adhered to the fuel tank body 2.
When the lid 4 is firmly attached to the fuel tank body 2, the seal 5 sandwiched between the lower surface 4 b of the outer edge of the lid 4 and the upper surface 3 b of the flange 3 a of the opening 3 is pressed. A strong sealing property can be realized.
[0023]
Next, a description will be given with reference to FIG. 2C, which is a longitudinal sectional view taken along line BB in FIG. FIG. 2C shows a longitudinal section of the through hole 7 and the through hole 11. The through hole 7 is provided between the support portion 6 and the outer wall surface 2 a of the fuel tank body 2 to which the support portion 6 is fixed, and the through hole 11 is provided in the bent portion 9 d of the attachment portion 9. Thereby, in the submerged leak test, when the fuel tank 1 to which the lid 4 is attached by the above procedure is immersed in the water tank, water flows in from the through hole 7 or the through hole 11, and the space 14 quickly Filled with. Accordingly, since it does not take time to introduce the regulated air after the fuel tank 1 is immersed in the water tank, the test time can be shortened. Moreover, since the through hole 11 is provided directly above the space portion 14, when the fuel tank 1 is immersed in the water tank, the air existing in the space portion 14 is quickly discharged from the through hole 11. Is done. As a result, it is possible to reliably prevent the generation of bubbles due to the air in the space 14 under test, and improve the accuracy of the submerged leak test.
[0024]
Further, since the through hole 7 is provided between the support portion 6 and the outer wall surface 2a of the fuel tank body 2 to which the support portion 6 is fixed, the through hole 7 is directly connected to the lower portion of the space portion 14. Yes. Thereby, after performing the submerged leak test, when the fuel tank 1 is pulled up from the water tank, the water filling the space portion 14 is quickly discharged from the through hole 7. Furthermore, since the through hole 11 is provided directly above the space portion 14, when water is discharged from the through hole 7, the water in the space portion 14 is pushed by the atmospheric pressure of the air flowing from the through hole 11. The water can be discharged more quickly. Therefore, the drying process of the fuel tank 1 after the test is facilitated, and further, corrosion of the constituent members due to the residual water after the test can be prevented.
[0025]
Next, a lid attachment structure for a fuel tank 20 according to a second embodiment of the present invention will be described with reference to the drawings as appropriate. The fuel tank 20 corresponds to a “sealed container” in the claims.
[0026]
FIGS. 3A and 3B to be referred to correspond to FIGS. 2B and 2C described in the first embodiment, and FIG. FIG. 3B is a vertical cross-sectional view of a through hole.
[0027]
As shown in FIG. 3A, the resin fuel tank 20 has bolts 22 erected at substantially equal intervals in the circumferential direction in a groove portion 21b provided on the outer wall surface 21a of the fuel tank body 21. The support part 23 is insert-molded. Then, while holding the upper surface 25a of the outer edge portion of the lid body 25 by the inner peripheral portion 24a of the mounting portion 24, the retaining hole 24b of the mounting portion 24 is engaged with the bolt 22 and fixed by the nut 26, thereby The body 25 is attached in a state where the body 25 is firmly attached to the fuel tank main body 21.
[0028]
Further, when the lid 25 is firmly attached to the fuel tank main body 21, the seal 28 sandwiched between the lower surface 25 b of the outer edge portion of the lid 25 and the upper surface 27 b of the flange 27 a of the opening 27 is pressed. A strong sealing property can be realized.
[0029]
Further, as shown in FIG. 3B, the fuel tank 20 includes a through hole 29 and a through hole 30. The through hole 29 is provided between the attachment portion 24 and the support portion 23, and the through hole 30 is provided in the bent portion 24 c of the attachment portion 24. Thereby, since the fuel tank 20 has the through-hole 29 directly connected below the space part 31, and also has the through-hole 30 directly connected above the space part 31, it is the same as that of 1st Embodiment. The effect of can be demonstrated.
[0030]
Further, since the support portion 23 is insert-molded in the groove portion 21b, the support portion 23 is firmly coupled to the fuel tank body 21. As a result, the sealing performance of the fuel tank 20 is improved.
Further, since the support portion 23 is insert-molded by providing the heat shrinkage allowance 32 of the fuel tank main body 21 shown by the broken line portion in FIG. 3, the fuel tank main body 21 changes as the temperature of the resin cools after the insert molding. By thermally contracting in the middle right direction, the wall surface 21c of the groove portion 21b and the outer peripheral end surface 23a of the support portion 23 come into contact with each other. Thereby, the attachment precision of the support part 23 improves. A space 33 is formed between the inner peripheral wall surface 23 b of the support portion 23 and the fuel tank main body 21 due to thermal contraction of the fuel tank main body 21.
[0031]
As mentioned above, although preferable embodiment was described, this invention is not limited to the said embodiment. For example, when fixing the mounting portion to the support portion, the bolts and nuts are used in the above embodiment, but the fixing method of the mounting portion is not limited to this, and while holding the lid from the outside, the support portion Any method can be used as long as it can be fixed so as to cross over.
Further, the through hole is not limited to the above embodiment as long as it is a hole that connects the space portion formed on the sealed container body side of the mounting portion and the outside by fixing the mounting portion to the support portion. .
Moreover, in the said embodiment, although the ring-shaped seal | sticker was arrange | positioned between the flange provided in the opening part of the airtight container main body, and the cover body, this invention is not specifically limited about a sealing means. For example, the leak may be prevented by sealing the opening of the sealed container body by using a lid having sealing properties.
[0032]
【The invention's effect】
As described above, the lid mounting structure for a hermetic container according to the present invention has a submerged leak by providing a through-hole that connects a space portion formed by fixing the mounting portion to the support portion and the outside. In the test, when the sealed container is immersed in the water tank, water quickly flows from the through hole, and the space is filled with water in a short time. Therefore, since it does not take time to introduce the regulated air after the sealed container is immersed in the water tank, the test time can be shortened. In addition, since air that has been present in the space through the through hole is removed, it is possible to prevent the generation of bubbles due to the air in the space under test, thereby improving the accuracy of the submerged leak test. It is done.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a lid mounting structure for a sealed container (automobile fuel tank) according to a first embodiment of the present invention.
2 is a lid mounting structure after mounting the components shown in FIG. 1, (a) is a plan view, (b) is a longitudinal sectional view taken along line AA in (a), and (c) is ( It is a longitudinal cross-sectional view of the BB line in a).
FIG. 3 is a lid attachment structure of a sealed container (automobile fuel tank) according to a second embodiment of the present invention, and FIG. 3 (a) is a longitudinal sectional view of a place where an attachment portion and a support portion are fixed. (B) is a longitudinal cross-sectional view of a through-hole.
4A and 4B are schematic views of a sealed container (automobile fuel tank) having a conventional lid mounting structure, where FIG. 4A is an overall perspective view, and FIG. 4B is a longitudinal sectional view taken along line CC in FIG. It is.
FIG. 5 is an enlarged view of a portion D in FIG.
FIG. 6 is a schematic view showing a submerged leak test method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fuel tank 2 Fuel tank main body 2a Outer wall surface 3 of fuel tank main body 4 Opening part 4 Lid body 6 Support part 7 Through hole 9 Mounting part 11 Through hole 14 Space part 20 Fuel tank 21 Fuel tank main body 21a Outer wall surface 23 of fuel tank main body Support portion 24 Mounting portion 25 Lid 27 Opening portion 29 Through hole 30 Through hole 31 Space portion

Claims (3)

密閉容器に設けられた開口部を閉塞する蓋体を備えた密閉容器の蓋体取付構造であって、
前記開口部を囲うようにして前記密閉容器本体の外壁面上に固定された支持部と、
前記蓋体を外側から押さえながら、前記支持部に架け渡すようにして固定することで、前記蓋体を前記密閉容器本体に取り付けるように形成された取付部とを備え、
前記取付部を前記支持部に固定することにより、前記取付部の前記密閉容器本体側に形成された空間部と外部とを繋ぐ貫通孔を設けたことを特徴とする密閉容器の蓋体取付構造。
A lid mounting structure for a sealed container provided with a lid for closing an opening provided in the sealed container,
A support portion fixed on the outer wall surface of the sealed container body so as to surround the opening,
An attachment part formed to attach the lid to the sealed container body by fixing the lid so as to be bridged to the support part while holding the lid from the outside,
A lid mounting structure for a sealed container, wherein a through hole is provided to connect the space formed on the sealed container main body side of the mounting portion to the outside by fixing the mounting portion to the support portion. .
前記貫通孔を、前記取付部に設けたことを特徴とする請求項1に記載の密閉容器の蓋体取付構造。The lid mounting structure for a hermetic container according to claim 1, wherein the through hole is provided in the mounting portion. 前記貫通孔を、前記支持部と前記支持部が固定されている前記密閉容器本体の外壁面との間、又は前記取付部と前記支持部との間に設けたことを特徴とする請求項1又は請求項2に記載の密閉容器の蓋体取付構造。The said through-hole was provided between the outer wall surface of the said airtight container main body to which the said support part and the said support part are being fixed, or between the said attaching part and the said support part, Or the cover attachment structure of the airtight container of Claim 2.
JP2003180860A 2002-12-06 2003-06-25 Closed container lid mounting structure Expired - Fee Related JP4081409B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2003180860A JP4081409B2 (en) 2003-06-25 2003-06-25 Closed container lid mounting structure
EP03777291A EP1591370B1 (en) 2002-12-06 2003-12-05 Cover body mounting structure of resin container
CA002508734A CA2508734C (en) 2002-12-06 2003-12-05 Cover-mounting structure of plastic container
US10/537,640 US20070062841A1 (en) 2002-12-06 2003-12-05 Cover body mounting structure of resin container
PCT/JP2003/015599 WO2004052743A1 (en) 2002-12-06 2003-12-05 Cover body mounting structure of resin container
DE60313221T DE60313221T2 (en) 2002-12-06 2003-12-05 MOUNTING STRUCTURE FOR COVERING A RESIN RESERVOIR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003180860A JP4081409B2 (en) 2003-06-25 2003-06-25 Closed container lid mounting structure

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JP2005014700A true JP2005014700A (en) 2005-01-20
JP4081409B2 JP4081409B2 (en) 2008-04-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007237950A (en) * 2006-03-09 2007-09-20 Denso Corp Vehicular fuel tank unit
CN102926902A (en) * 2011-08-10 2013-02-13 上海柱信汽车电子燃油系统有限公司 Electric fuel pump with strengthened sealing performance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007237950A (en) * 2006-03-09 2007-09-20 Denso Corp Vehicular fuel tank unit
CN102926902A (en) * 2011-08-10 2013-02-13 上海柱信汽车电子燃油系统有限公司 Electric fuel pump with strengthened sealing performance

Also Published As

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