JP3619159B2

JP3619159B2 - Immersion holder for bag-like workpieces

Info

Publication number: JP3619159B2
Application number: JP2001037649A
Authority: JP
Inventors: 洋次太田; 恒弘清水; 謙一清水
Original assignee: 株式会社杉浦製作所; 合資会社清水鍍金工業所
Priority date: 2001-02-14
Filing date: 2001-02-14
Publication date: 2005-02-09
Anticipated expiration: 2020-03-21
Also published as: JP2001262397A

Description

【０００１】
【発明の属する技術分野】
この発明は、複数の袋状ワーク（袋ナット等）を例えばツリー状に保持して所定の液槽、例えばメッキ槽等に浸漬するための袋状ワークの浸漬保持具に関する。
【０００２】
【従来の技術】
従来、例えば袋ナットに酸電解（焼入後のスケール取り）や電解メッキ等の処理を施す場合は、いわば魚の骨を尾部を上にして吊り下げたような浸漬保持具を用いる場合が多い。その浸漬保持具のそれぞれの枝部に、１個ずつ袋ナットをその開口から取り付けることにより、多数の袋ナットをそれぞれが斜め上を向く姿勢（開口部が斜め下を向く姿勢）でツリー状に保持し、その保持具を多数の袋ナットとともに酸電解槽（硫酸液等を主体とする）やメッキ槽等に浸漬して脱スケール処理やメッキ処理等を行っている。
【０００３】
【発明が解決しようとする課題】
そこで、浸漬保持具を多数の袋ナットとともに例えば酸電解槽に浸漬していく過程で、袋ナットの閉ざされた空間（閉鎖空間）には酸電解液が入り込み、その液面が相対的に上昇していくが、閉鎖空間内に閉じ込められる空気により液はその閉鎖空間に充満することはできず、袋ナットの内面には酸電解液と接触できない部分が残る。袋ナットの酸電解液と接触しない内面部分では焼入時等に生じたスケール（いわゆる黒皮）が残りやすく、防錆等の点で必ずしも充分でない。そのため、メッキ処理工程後に、バレル槽等で防錆液を袋ナットの内面に付ける工程が必要となる場合がある。
【０００４】
この発明の課題は、袋ナット等の袋状ワークの所定の液槽への浸漬時に、その袋状ワークの閉鎖空間の内面の全体に可及的に液がまわるようにする浸漬保持具を提供することにある。
【０００５】
【課題を解決するための手段及び発明の効果】
この発明は、袋状の空間（閉鎖空間）を有する複数の袋状ワーク（ここでワークとは、素材・中間品又は完成品を問わず、何らかの処理（加工含む）がなされる物をいう。以下同じ）を保持して、それらのワークとともに液槽に浸漬されるワーク浸漬保持具であって、そのワーク浸漬保持具は昇降方向に長手状に延びる本体軸部と、袋状ワークの開口部から袋状の空間（閉鎖空間）に突入するように延びる支持竿部とを備え、本体軸部に対して枝状に、所定の間隔で斜め上方を向くように連結された複数の支持竿部は、袋状ワークの開口部に対し袋状の空間の少なくとも一部が上側に位置する姿勢で夫々袋状ワークを支持しており、液槽への浸漬時に袋状ワークの開口部から流入する液の液面と袋状の空間との間に閉じ込められる空気を外部に逃がす管路が、本体軸部内と支持竿部内とに連続して形成されるとともに、液槽への浸漬により、袋状ワークの袋状の空間から空気を外部に逃がす管路に流入した液を、当該ワーク浸漬保持具の液槽からの上昇の際に排出する液排出部が、管路に連通して設けられ、その液排出部は絞り部によって形成され、その絞り部は当該ワーク浸漬保持具が液槽に浸漬される過程で液の進入に抵抗が付与され、袋状ワークの袋状の空間の空気が支持竿部の管路を経て本体軸部の管路から逃がし終えるまでは、絞り部はその本体軸部の管路への液の流入を遅らせて、その後管路が液で満ちることを許容するものであることを特徴とする。
【０００６】
これにより、液槽への浸漬の過程で袋状ワークの閉鎖空間と液面との間に閉じ込められる空気が、上記管路を経て外部に逃がされ、同空間内に密閉される空気によって液の進入が妨げられることがなくなるため、袋状ワークの内面の多くの部分に液が接触することができ、例えば酸電解（スケール除去）、メッキ、脱脂、洗浄、防錆その他の効果・効率を高めることが可能となる。例えば、脱スケールのための酸電解槽への浸漬において袋状ワークの内面にこれまでより広範囲に液が接触することで、スケールの除去効果が高められる。
【０００７】
上記管路は例えば支持竿部をパイプ状（管状）のものとすることによりその内部に形成することができる。さらにワーク浸漬保持具の形態としては、昇降方向に長手状に形成されて内部に空気を通す本体管路が形成された本体軸部と、その本体軸部に枝状に所定の間隔で複数連結されて内部に空気を通す分岐管路が前記本体管路と連通するように形成された複数の支持竿部と、本体軸部の下端部に液排出部を設けた構成とすることができ、また、その液排出部を前記本体管路の管路断面より小さい断面の液排出孔とし、さらにその液排出孔に絞り部の機能を付与する構成とすることもできる。
【０００８】
このようにすれば、液槽への浸漬により袋状ワークの袋状の空間から前記管路に流入した液を、当該ワーク浸漬保持具の前記液槽からの上昇の際に、液排出孔（排出部）から排出することができる。また絞り部は、ワーク浸漬保持具が液槽に浸漬される過程で、袋状の空間（閉鎖空間）の空気を管路を経て逃がし終えるまでは、その管路への液の流入を遅らせ、その後管路が液で満ちることとなる。つまり、液槽への浸漬で直ちに上記管路が液で満たされてしまうと、袋状ワークの閉鎖空間からその管路を経て空気を逃がすことが困難になるが、絞り部で上記管路への液の進入を遅らせることにより、確実に空気を逃がしてから管路が液で満ちるようにしやすい。なお、絞り部の機能を液排出孔に持たせた場合は、ワーク浸漬保持具が液槽から上昇した際には、その絞り部を経て管路内の液が流下することとなる。
【０００９】
また、この発明の好適な形態では、前記本体軸部がパイプ材で構成され、同じくパイプ材で構成された支持竿部が本体軸部に、パイプ材同士で互いに連通する管路を形成するように連結され、その本体軸部の上部開口が通気排出部とされて、その上部開口を経て袋状ワークの袋状空間の空気が逃がされる一方、その本体軸部の下端部が閉塞され、その閉塞部に液排出孔が形成されて前記液排出部及び絞り部として機能する。
【００１０】
【発明の実施の形態】
以下、この発明の実施の形態を図面に示す実施例に基づいて説明する。
図１は袋状ワークの一例として袋ナットを示すものである。袋ナット１はめねじ部４を有する本体２と、本体２のおねじ部材の螺入側とは反対側の開口を塞ぐキャップ部３とを備え、めねじ部４とその奥部の空所（ボルト等のおねじ部材の先端部が進入する部分）とにより袋状の空間（閉鎖空間）５が形成される。このような袋ナット１が、鍛造加工さらに転造もしくは切削等によるねじ加工、キャップ部３の溶接及び熱処理の後、洗浄や防錆、メッキ等のために所定の液槽に浸漬されるのが普通である。
【００１１】
その際、図２に示すような本発明の浸漬保持具７を用いる。この浸漬保持具７は、昇降方向に長手状に延びる金属製の本体軸部８と、この本体軸部８から枝状に、所定の間隔で斜め上方を向くように連結された複数の支持竿部９とを備え、それら支持竿部９に１つずつ袋ナット１が装着される。
【００１２】
図２（ｂ）に示すように、支持竿部９とほぼ平行に弾性押圧部（線状のばね部材）１０が本体軸部８に固定され、これら支持竿部９と弾性押圧部１０とに袋ナット１が差し込まれて、（ａ）のように、ツリー状に多数の袋ナット１が浸漬保持具７に保持される。そして、図３に示すように、この状態で所定の液槽１２（例えば電解メッキ槽、無電解メッキ槽、酸電解（脱スケール）液槽、防錆液槽、脱脂液槽、洗浄液槽その他適宜の液槽）に浸漬され、所定の処理が終われば、液槽１２から浸漬保持具７が処理後の袋ナット１とともに引き上げられることとなる。
【００１３】
さらに、図４のように、例えば電解メッキライン等においては、搬送ライン１３に沿ってそのラインの連結部１５に上述の袋ナット１を保持した浸漬保持具７が連結され、各工程の液槽１２に浸漬を繰り返して所定の工程が終了する。例えば１２ａが脱脂液槽、１２ｂが酸電解槽、１２ｃが電解メッキ槽というように工程順に液槽が並べられる。なお、図示はしないが、これらの間に通常は洗浄液槽が設けられる。そして、（ｂ）のように各工程の液槽１２に対しそれぞれの浸漬保持具７が袋ナット１とともに昇降装置（昇降ガイド）１６に沿って下降し、所定時間液槽に浸漬した後上昇し、搬送ライン１３に沿って前進して次の工程に移動することとなる。
【００１４】
図５は、上述の浸漬保持具７をより具体的に示すもので、本体軸部８及び支持竿部９及び弾性押圧部１０はいずれも金属製のものであるが、例えば電解メッキ槽に浸漬される場合、メッキが付かないように樹脂等の絶縁層３５で被覆される。ただし、支持竿部９及び弾性押圧部１０の先端側部分は被メッキ材との通電性を得るために金属が露出している。
【００１５】
図６は、本体軸部８と支持竿部９の各構造並びにその連結構造を示すものである。本体軸部８は長手状のパイプ形態（例えば角パイプ状、丸パイプ状）をなしており、その内部が空気の流通のための本体管路１８とされている。また、支持竿部９もパイプ材とされ、その内部が空気の流動のための分岐管路１９とされている。このようなパイプ状の支持竿部９の基端部を本体軸部８に、パイプ同士で互いに連通するように固定するために、本体軸部８には取付孔２２が形成され、その取付孔２２に支持竿部９の基端部が挿入された状態で、ロー付けや溶接又はねじ込み、圧入その他適宜の固定方法によって固定される。支持竿部９は、本体軸部８の軸線に対し、水平な姿勢より斜め上方を向くように傾斜して固定されている。本例の場合、これら支持竿部９は図示のように本体軸部８の軸線を挟んで同じ高さで両側の側面に固定されるが、これらは千鳥状に配置してもよく、条件によっては本体軸部８の三面乃至四面から三方又は四方に突出するように設けることもできる。また、本例の場合、支持竿部９はそれぞれ片側同士で等間隔等所定の間隔で配列され、互いに平行となっている。なお、取付孔２２は、支持竿部９の斜め上方を向く軸線に沿って斜め上方を向くように形成され得る。
【００１６】
各支持竿部９の分岐管路１９からの空気は、本体軸部８の本体管路１８を経て上方に抜けることが可能で、本体軸部８の上端開口２７が通気排出部（空気排出口）となる。一方、本体軸部８の下端部は、閉塞部２０によって閉塞され、その閉塞部２０には液排出部と絞り部を兼ねる液排出絞り孔２１が形成され、支持竿部９の分岐管路１９を経て本体軸部８の本体管路１８に入った液を、浸漬保持具７の上昇時にその液排出絞り孔２１から下方へ排出するようになっている。
【００１７】
図７は、絶縁層３５を省略した浸漬保持具７をさらに具体的に示すものである。本体軸部８の、上記支持竿部９等が固定される面とは９０度異なる面に、電極部材としてのブスバー２３が固定されている。このブスバー２３は、本体軸部８とほぼ同じ長さを有する長手状のもので、本体軸部８の上端部にほぼ対応してフック状の通電連結部２３ａ（図１０も参照）が形成され、図示しない通電電極部（例えば図４の連結部１５に設置される）に通電連結部２３ａにおいて連結される。この際、通電電極部とブスバー２３との電気的な接触を確保するため、導電材料からなるばね部材２４がブスバー２３の外面に固定され、このばね部材２４と通電連結部２３ａとの間に、相手方の通電電極部が入り込み、電気的に接触状態となる。本例では、このようなブスバー２３を本体軸部８に固定するために、その長手方向に所定の間隔で複数の固定金具３２が設けられ、これらの固定金具３２によりブスバー２３が本体軸部８に固定される。また本体軸部８の上端部には、ブスバー２３のフック状の通電連結部２３ａと背中合わせになるようにフック部２６が固定され、浸漬保持具７の保管や運搬その他必要なときにフック部２６が利用される。なお、ブスバー２３の通電連結部２３ａの構造や、本体軸部８への固定構造として他の構造を採用することも勿論可能である。
【００１８】
前述の弾性押圧部１０は、ここでは本体軸部８の両側から斜め上方に突出する一対の部分が連結部２５により連結されて、上方に向かって開く形態の一体の部品を構成する。その連結部２５がブスバー２３に固定金具３１によって電気的に接触した状態で固定される。固定金具３１は、弾性押圧部１０の部品の連結部２５をブスバー２３に圧着した状態でブスバー２３に溶接等によって固定される。このように両側の弾性押圧部１０を構成する部品は、図９に示すように、その連結部２５がブスバー２３、さらに本体軸部８に嵌る箱形断面をなし、その部分が図７に示すように、ブスバー２３及び本体軸部８に跨るように固定され、その連結部２５の両端から前述の弾性押圧部１０が支持竿部９とほぼ同一の垂直面内に位置するようにして、支持竿部９と近接して対向する。このように本例では、本体軸部８を挟んで対向する弾性押圧部１０が連結部２５を介して一体の構造となっているため、個々に固定する場合に比べて製作が簡単で強度的にも優れている。
【００１９】
弾性押圧部１０はその中間部に支持竿部９との対向方向とは反対側（外側）に膨らむような山形もしくは湾曲状の突出部３０を備え、この突出部３０が図１の袋ナット１の雌ねじ部４に内側から押し付けられこととなる。また、この例では、支持竿部９にも、弾性押圧部１０との対向方向とは反対側（外側）に突出する山形又は湾曲状の突出部２９が形成され、この突出部２９と弾性押圧部１０の突出部３０が互いに外向きとなるように近接している。そして、図１に示す袋ナット１がこれらの支持竿部９及び弾性押圧部１０に差し入れられる際は、袋ナット１の例えば雌ねじ部４の内面が弾性押圧部１０の突出部３０に接触して、この弾性押圧部１０を内側に弾性変形しつつ奥まで進入し、この際支持竿部９の突出部２９も雌ねじ部４の内面に弾性押圧部１０の弾性力の反作用で押し付けられて、袋ナット１は実質的にガタツキなく支持竿部９及び弾性押圧部１０により保持される。
【００２０】
なお、支持竿部９の突出部２９を省略して、図７（ｃ）に示すように、直線的なパイプ状の支持竿部９とすることもできる。この場合は、支持竿部９の上側の外面が袋ナット１の雌ねじ部４の内面に直線に沿って全面的又は部分的に接触して袋ナット１が支持されることとなる。また、前述の本体軸部８の側壁に形成される取付孔２２を、その本体軸部８の軸線と直交する方向に形成し、支持竿部９の基端部に基端曲部３３を形成して、この基端曲部３３で取付孔２２に固定するようにすることもできる。
【００２１】
図８は、その支持竿部９の形態の例を示すもので，（ａ）の支持竿部９は、その基端部が本体軸部８に斜めに形成された取付孔２２に嵌め込まれるタイプのもの、（ｂ）が基端曲部３３において本体軸部８に長手方向と直角（例えば水平方向）に形成された取付孔２２に嵌め込まれるものである。なお、いずれにしても支持竿部９の中間部に突出部２９が形成される又はされないにかかわらず、支持竿部９の内部の分岐管路１９は、その基端から先端まで連続するものである。
【００２２】
また支持竿部９の先端は、図１１（ｂ）に示すようにその軸線に対し直角な形態でもよいが、同図（ａ）のようにその先端を傾斜先端２８として分岐管路１９の先端開口を水平に近い状態で上方に開口するように設けることもできる。このような傾斜先端２８とすることにより、支持竿部９の分岐管路１９の開口位置を可及的に上方に位置させることができ、後述するように液槽への浸漬時に相対的に液面が上昇する際、その液の支持竿部９内への進入をできるだけ遅らせ、袋ナット１の内面のより多くの面積を液に浸漬させることが可能となる。また、例えば図１のキャップ部３に支持竿部９の先端が当接しても、傾斜先端２８により支持竿部９の先端開口がキャップ部３に密着することがなく、そのためキャップ部３等で塞がれにくくなる。
【００２３】
図１２に示すように、支持竿部９と弾性押圧部１０との関係は、（ａ）に示すように支持竿部９が上側に位置して突出部２９を有し、その下側の押圧部１０に突出部３０が形成される形態、（ｂ）のようにその上下の位置関係が逆になった形態、（ｃ）のように支持竿部９は直線的で上側に位置する形態、（ｄ）のように支持竿部９が直線的で下側に位置する形態でもよい。さらに、（ｅ）、（ｆ）のように、弾性押圧部もパイプ材で構成して、これを支持竿部９とすることもできる。この場合、一方又は双方の支持竿部９が弾性押圧部１０を兼ねるため、形式的には弾性押圧部１０は省略されたと見ることもできる。
【００２４】
図１２（ｅ）、（ｆ）のように、各支持竿部９はともにパイプ形態をなすため、双方の支持竿部９の内部を経て空気を逃がすことができる。なお、（ｅ）の例では、上側の支持竿部９が直線的で、下側の支持竿部９がその中間部に突出部２９を有する形態、（ｆ）では、上側も下側もそれぞれ突出部２９を有して、両者の中間線に対し互いに対称に形成される例である。また、浸漬保持具として電解メッキ槽に使用するような場合は、図１３に示すように、この浸漬保持具７が一方の電極になるため、図７等のブスバー２３から弾性押圧部１０を分岐電極に利用してそれぞれの弾性押圧部１０に電圧が印加され、それら弾性押圧部１０と電気的に接触する袋ナット１が例えばマイナス極となり、電解メッキが行われる。なお、本例では本体軸部８及び支持竿部９が共に金属製のため、これらも電極として機能し得ることとなる。
【００２５】
また、図１２（ｅ）及び（ｆ）においては、一方又は双方の支持竿部９に電極の役割を果たさせることとなる。他方、電解を行わない単なる浸漬メッキであるとか、防錆液、脱脂液あるいは洗浄液等への浸漬専用の保持具であれば、電極は不要であり、この場合は、浸漬保持具７全体を樹脂等の絶縁性材料で構成することもできる。ただし電気メッキ槽を含む工程ラインで使用される浸漬保持具は、通常前述のように脱脂槽、酸電解槽、電解メッキ槽、洗浄槽等を経るため、汎用的な保持具とする必要上、前述のブスバー２３及び分岐電極としての弾性押圧部１０等、電極として機能する構造を有するものが使用されることとなる。
【００２６】
図１４は、この発明の一例である浸漬保持具７を模式的に示すとともにその作用を説明するためのものである。（ａ）に示すように、前記連結部１５のような通電電極部に装着されるブスバー２３を介して各弾性押圧部１０に通電路が分岐する。一方、各支持竿部９の分岐管路１９から本体軸部８の本体管路１８につながる空気通路が形成される。言い換えれば、本体管路１８に対し複数の分岐管路１９が並列に連通する。
【００２７】
ここで、本体軸部８は例えばステンレス製等の角パイプ材が用いられ、ブスバー２３は、電極材料として優れた良導電材料、例えば銅板が用いられる。また、同様に支持竿部９には耐食性並びに導電性のあるステンレスパイプが、弾性押圧部１０には銅棒が好適に使用される。そして、本体軸部８やブスバー２３及び支持竿部９及び弾性押圧部１０の基端部には、不要電流が流れないように、またメッキ層が形成されないように、絶縁被覆として樹脂等の被覆層（絶縁層）３５が形成される（図５参照）。なお、本体軸部８と支持竿部９に電極として十分な機能及び構造をもたせた場合は、必ずしもブスバー２３を別体に設ける必要はない。
【００２８】
図１３に示したような電解メッキ槽１２に多数の袋ナット１を保持した浸漬保持具７を浸漬する場合、この保持具７側が例えばマイナス極、これに対する対向電極３６が例えばプラス極としてメッキ槽１２内に配置される。そのように保持具７を電解メッキ槽等の液槽１２に浸漬していく過程で、図１４（ａ）のように支持竿部９にそれぞれ分岐管路１９が形成され、これが本体軸部８の本体管路１８を経て上部開口２７につながっているところから、袋ナット１の閉鎖空間に閉じこめられる空気が液面の相対的な上昇に従ってそれらの管路１９、１８を経て外部へ逃がされる。
【００２９】
図１４（ｂ）は、浸漬途上の過程を示すもので、浸漬保持具７が浸漬を開始すると、その本体軸部８の下部に形成された液排出絞り孔２１から液が本体軸部８の本体管路１８内に進入する。しかし、液排出絞り孔２１の絞り効果により液の進入に抵抗が付与されるため、本体管路１８内の相対的な液面の上昇と、浸漬保持具７の外部液面の相対的な上昇とには、格差ｈが生じる。このような液排出絞り孔２１の絞り効果（言い換えれば、本体管路１８の液面と液槽の液面とに浸漬過程で生じるｈの格差）により、袋ナット１の閉鎖空間に閉じ込められる空気が逃げ、液体が分岐管路１９の先端開口から流入するようになってから本体管路１８内の液面が当該分岐管路１９の基端側開口位置まで上昇することとなる。つまり、浸漬保持具７の浸漬の過程で液面が相対的に上昇し、袋ナット１の閉鎖空間に液が進入してその空間の開口部を塞ぐこととなるが、この時同空間は未だ分岐管路１９を通じて本体管路１８に気体通路として連通しているため、これらの管路１９、１８を通じて同空間内の空気を逃がすことにより、同空間内での液面の上昇を許容する。そして、その液面が分岐管路１９の先端開口に達し、その先端開口を通して液体が分岐管路１９内に流入するようになるまでは、当該支持竿部９の本体管路１８側の開口が液体で閉塞されないため、袋状空間内では分岐管路１９の先端開口の位置まで液面が確実に上昇することが許容され、従ってその高さ位置まで袋ナット１の内面が液体に確実に浸漬されることとなる。
【００３０】
ここで、仮に本体管路１８の液面と液槽の液面との格差ｈが全くないとすれば、分岐管路１９の基端側開口が液体で閉塞された時点で分岐管路１９と本体管路１８が遮断されるため、袋ナット１の閉鎖空間から分岐管路１９を経て本体管路１８側に逃げようとする空気の流れが遮断され、従って袋状空間内の液面はそれ以上上昇しないことになる。
【００３１】
図１５（ａ）に示すように、浸漬保持具７が液槽１２内へ完全に浸漬して安定した状態では、液槽の液面と本体管路１８の液面とが同レベルとなる。言い換えれば、各支持竿部９の分岐管路１９から袋ナット１の閉鎖空間の空気が逃がされた後、それら分岐管路１９から液が入り込んでその分岐管路１９を満たすとともに、それら分岐管路１９から流入した液並びに液排出絞り孔２１から進入した液により本体管路１８もまた液で満たされることとなる。
【００３２】
図１５（ｂ）に示すように、そのような状態から浸漬保持具７を上昇させて液槽１２から引き上げると、各支持竿部９の分岐管路１９内に存在する液は本体管路１８に流入し、さらに本体管路１８内の液は、液排出絞り孔２１を経て流下し、最終的に分岐管路１９及び本体管路１８内の液が共に排出されることとなる。なお、この液排出絞り孔２１の大きさは、前述の絞り機能と排出機能を共に満たすため、浸漬保持具７の下降・上昇速度や液の粘度等の条件に応じた大きさに設定されることとなる。
【００３３】
この液排出絞り孔２１としては、例えば図１６（ａ）に示すように、本体軸部８の閉塞部２０に形成された単純な孔２１、（ｂ）のように本体軸部８の下端部に傾斜面３７のようにテーパ状の部分を形成して、その下端部に設けた孔２１でもよい。さらに（ｃ）に示すように、本体軸部８の下端部に細管部３８を一体的に設け、この細管部３８の管路を液排出絞り孔２１としてもよい。この場合、（ｄ）に示すように、その細管部３８の上側をテーパ状にする斜面３７とし、いわば漏斗状の形態でその下部に液排出絞り孔２１を形成することもできる。（ｄ）のように漏斗状ないしテーパ状とすることで（これは（ｂ）についても言えることである）、液が流下しやすくなる効果を生じる。
【００３４】
さらに（ｅ）に示すように、複数の液排出絞り孔２１を形成することもできる。また、（ｆ）に示すように、絞り部４０を液排出部４１と別途設けることもできる。この場合、本体軸部８の本体管路１８の中間部に他の部分より断面積の少ない管部分を形成してその内側を絞り部４０とし、液排出部４１は本体軸部８の下端部に、本体管路１８と同じような断面積で形成することもできる。（ｇ）に示すように、閉塞部２０を本体軸部８に対して脱着可能な別部材として設けることもできる。このように脱着可能とすれば、本体管路１８内の清掃等を容易に行えるようになる。
【００３６】
さらに、以上の説明では袋状ワークとして袋ナット１を例に挙げたが、これに限らず、要するに袋状空間を有して、液槽への浸漬時に空気が閉じ込められるタイプのワークに対してすべて本発明を適用できる。
【図面の簡単な説明】
【図１】この発明の浸漬保持具が利用される袋状ワークの一例としての袋ナットを示す図。
【図２】この発明の浸漬保持具に袋状ワークを取り付けた状態を示す図。
【図３】それを所定の液槽に浸漬する動作を説明する図。
【図４】搬送ラインに沿って浸漬を繰り返す工程の一例を示す図。
【図５】この発明の浸漬保持具の一例を示す正面図。
【図６】本体軸部に支持竿部をパイプ材同士で連結する形態を示す図。
【図７】この発明の浸漬保持具をさらに具体的に示す図。
【図８】支持竿部の例を示す図。
【図９】弾性押圧部の部品例を示す図。
【図１０】ブスバーの形態例を示す図。
【図１１】支持竿部の先端形状の例を示す図。
【図１２】支持竿部と弾性押圧部との組合せのいくつかの例を示す図。
【図１３】この発明の浸漬保持具を電解メッキ槽に使用する例を示す図。
【図１４】この発明の浸漬保持具の一例を概念的に断面で示すとともに、液槽への下降時の様子を説明する図。
【図１５】この発明の浸漬保持具の一例を概念的に断面で示すとともに、液槽での浸漬状態及び液槽からの上昇時の様子を説明する図。
【図１６】液排出絞り孔又は絞り部のいくつかの例を示す図。
【符号の説明】
１袋ナット
５袋状空間（閉鎖空間）
７浸漬保持具
８本体軸部
９支持竿部
１０弾性押圧部
１２液槽
１３搬送ライン
１８本体管路
１９分岐管路
２１液排出絞り孔
２３ブスバー
２７上部開口
２９、３０突出部
３５絶縁層（被覆層）
４０絞り部
４１液排出部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dipping holder for a bag-like workpiece for holding a plurality of bag-like workpieces (eg, bag nuts) in a tree shape and immersing them in a predetermined liquid tank, for example, a plating tank.
[0002]
[Prior art]
Conventionally, for example, when processing such as acid electrolysis (scaling after quenching) or electrolytic plating is performed on a cap nut, a so-called immersion holder in which a fish bone is hung with its tail up is often used. By attaching one cap nut to each branch part of the immersion holder from its opening, a number of cap nuts are arranged in a tree shape in an attitude in which each of them is diagonally upward (position in which the opening is diagonally downward). The holding tool is dipped in an acid electrolysis tank (mainly sulfuric acid solution or the like) or a plating tank together with a number of cap nuts for descaling or plating.
[0003]
[Problems to be solved by the invention]
Therefore, in the process of immersing the immersion holder together with a number of cap nuts, for example, in the acid electrolysis tank, the acid electrolyte enters the closed space of the cap nut (closed space), and the liquid level rises relatively. However, the liquid cannot be filled in the closed space by the air confined in the closed space, and a portion that cannot contact the acid electrolyte remains on the inner surface of the cap nut. The inner surface of the cap nut that does not come into contact with the acid electrolyte tends to leave a scale (so-called black skin) generated during quenching or the like, which is not always sufficient in terms of rust prevention. Therefore, after the plating process, there may be a case where a process of attaching a rust preventive liquid to the inner surface of the cap nut in a barrel tank or the like is required.
[0004]
An object of the present invention is to provide an immersion holder that allows liquid to flow as much as possible to the entire inner surface of a closed space of a bag-shaped workpiece when the bag-shaped workpiece such as a bag nut is immersed in a predetermined liquid tank. There is to do.
[0005]
[Means for Solving the Problems and Effects of the Invention]
The present invention refers to a plurality of bag-like workpieces having a bag-like space (closed space) (here, the workpiece is a material to be processed (including processing) regardless of a material, an intermediate product, or a finished product). The same below), and a workpiece immersion holder that is immersed in a liquid tank together with those workpieces,The workpiece immersion holder has a main body shaft portion extending longitudinally in the ascending / descending direction, andSupport collar extending from the opening of the bag-like workpiece so as to enter the bag-like space (closed space)WhenWithA plurality of branches connected to the main body shaft so as to face obliquely upward at predetermined intervals.Support collarIsAt least a part of the bag-shaped space is positioned above the opening of the bag-shaped workpiece.RespectivelySupports bag-like workpiecesHaveA pipe line for releasing the air trapped between the liquid level of the liquid flowing in from the opening of the bag-like workpiece and the bag-like space when immersed in the liquid tank to the outside,In the body shaftInside the support collarAnd continuouslyFormationIn addition, the liquid that has flowed into the conduit for escaping air from the bag-shaped space of the bag-like work to the outside by being immersed in the liquid tank is discharged when the work immersion holder is lifted from the liquid tank. A discharge part is provided in communication with the pipe line, the liquid discharge part is formed by a throttle part, and the throttle part is given resistance to the ingress of liquid in the process in which the workpiece immersion holder is immersed in the liquid tank. Until the air in the bag-like space of the bag-like workpiece has escaped from the pipe of the main body shaft through the pipe of the support collar, the throttle part delays the inflow of liquid into the pipe of the main body shaft. And then allow the conduit to fill with liquidIt is characterized by that.
[0006]
As a result, air trapped between the closed space of the bag-like workpiece and the liquid surface in the process of immersion in the liquid tank is released to the outside through the conduit, and the liquid is sealed by the air sealed in the space. This prevents liquids from coming into contact with many parts of the inner surface of the bag-like workpiece. For example, acid electrolysis (scale removal), plating, degreasing, cleaning, rust prevention, and other effects and efficiencies It becomes possible to raise. For example, the scale removal effect is enhanced by bringing the liquid into contact with the inner surface of the bag-like workpiece in a wider range in the immersion in the acid electrolysis tank for descaling.
[0007]
The said pipe line can be formed in the inside, for example by making a support collar part into a pipe shape (tubular) thing. Furthermore, as a form of workpiece immersion holder, a main body shaft portion that is formed in a longitudinal shape in the ascending / descending direction and has a main body passage through which air passes is formed, and a plurality of branches are connected to the main body shaft portion at predetermined intervals. A plurality of supporting flanges formed so that the branch pipes that allow air to pass through communicate with the main body pipes, and a liquid discharge part provided at the lower end of the main body shaft part, Further, the liquid discharge part may be a liquid discharge hole having a cross section smaller than the cross section of the main body pipe line, and the function of the throttle part may be added to the liquid discharge hole.
[0008]
If it does in this way, the liquid which flowed into the said pipe line from the bag-shaped space of a bag-like work by immersion in a liquid tank will be referred to as a liquid discharge hole ( It can be discharged from the discharge section. In addition, in the process where the work immersion holder is immersed in the liquid tank, the throttle portion delays the inflow of liquid into the pipe line until the air in the bag-like space (closed space) has been released through the pipe line, After that, the pipeline is filled with liquid. In other words, if the pipe line is filled with liquid immediately after being immersed in the liquid tank, it becomes difficult to escape air from the closed space of the bag-like workpiece through the pipe line, but the throttle part goes to the pipe line. By delaying the entry of the liquid, it is easy to make sure that the pipe is filled with the liquid after the air is surely released. In addition, when the function of the throttle part is provided in the liquid discharge hole, when the workpiece immersion holder is lifted from the liquid tank, the liquid in the pipe line flows down through the throttle part.
[0009]
Further, in a preferred embodiment of the present invention, the main body shaft portion is made of a pipe material, and the support flange portion also made of the pipe material forms a pipe line communicating with each other between the pipe materials on the main body shaft portion. The upper opening of the main body shaft portion is used as a ventilation discharge portion, and air in the bag-like space of the bag-like workpiece is released through the upper opening, while the lower end portion of the main body shaft portionIs blockedIn the blockage ofLiquid discharge holeFormedTheIt functions as the liquid discharge part and the throttle part.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below based on examples shown in the drawings.
FIG. 1 shows a cap nut as an example of a bag-like workpiece. The cap nut 1 is provided with a main body 2 having a female thread portion 4 and a cap portion 3 that closes an opening opposite to the screw-in side of the male screw member of the main body 2. A bag-like space (closed space) 5 is formed by a portion where the tip of a male screw member such as a bolt enters. Such a cap nut 1 is immersed in a predetermined liquid bath for cleaning, rust prevention, plating, etc. after forging, further threading by rolling or cutting, welding of the cap part 3 and heat treatment. It is normal.
[0011]
At that time, the immersion holder 7 of the present invention as shown in FIG. 2 is used. The immersion holder 7 includes a metal main body shaft portion 8 extending longitudinally in the ascending / descending direction, and a plurality of support rods connected in a branch shape from the main body shaft portion 8 so as to face obliquely upward at predetermined intervals. Part 9, and the cap nuts 1 are attached to the support collars 9 one by one.
[0012]
As shown in FIG. 2 (b), an elastic pressing portion (linear spring member) 10 is fixed to the main body shaft portion 8 substantially in parallel with the supporting flange portion 9, and the supporting flange portion 9 and the elastic pressing portion 10 are connected to each other. The cap nut 1 is inserted, and a large number of cap nuts 1 are held by the immersion holder 7 in a tree shape as shown in FIG. Then, as shown in FIG. 3, in this state, a predetermined liquid tank 12 (for example, an electrolytic plating tank, an electroless plating tank, an acid electrolysis (descaling) liquid tank, a rust prevention liquid tank, a degreasing liquid tank, a cleaning liquid tank, and the like as appropriate. When the predetermined treatment is completed, the immersion holder 7 is pulled up together with the cap nut 1 after the treatment.
[0013]
Further, as shown in FIG. 4, for example, in an electrolytic plating line or the like, the immersion holder 7 holding the above-described cap nut 1 is connected to the connecting portion 15 of the line along the transfer line 13. The predetermined process is completed by repeating the immersion in step 12. For example, the liquid tanks are arranged in the order of the process, such that 12a is a degreasing liquid tank, 12b is an acid electrolytic tank, and 12c is an electrolytic plating tank. Although not shown, a cleaning liquid tank is usually provided between them. And as shown in (b), each immersion holder 7 descends along the lifting device (elevating guide) 16 together with the cap nut 1 with respect to the liquid tank 12 in each step, and rises after being immersed in the liquid tank for a predetermined time. Then, it moves forward along the transfer line 13 and moves to the next step.
[0014]
FIG. 5 shows the above-mentioned immersion holder 7 more specifically, and the main body shaft portion 8, the support collar portion 9, and the elastic pressing portion 10 are all made of metal, for example, immersed in an electrolytic plating tank In this case, it is covered with an insulating layer 35 such as a resin so as not to be plated. However, the metal is exposed at the tip side portions of the support flange portion 9 and the elastic pressing portion 10 in order to obtain electrical conductivity with the material to be plated.
[0015]
FIG. 6 shows each structure of the main body shaft portion 8 and the support flange portion 9 and its connection structure. The main body shaft portion 8 has a long pipe shape (for example, a square pipe shape or a round pipe shape), and the inside of the main body shaft portion 8 serves as a main body pipe line 18 for air circulation. Further, the support flange 9 is also a pipe material, and the inside thereof is a branch pipe 19 for air flow. In order to fix the base end portion of such a pipe-shaped support collar 9 to the main body shaft portion 8 so as to communicate with each other between the pipes, an attachment hole 22 is formed in the main body shaft portion 8, and the attachment hole In a state where the base end portion of the support flange portion 9 is inserted into 22, it is fixed by brazing, welding or screwing, press-fitting or other appropriate fixing methods. The support collar portion 9 is fixed to the axis of the main body shaft portion 8 so as to be inclined obliquely upward from a horizontal posture. In the case of this example, these support collars 9 are fixed to both side surfaces at the same height across the axis of the main body shaft 8 as shown, but these may be arranged in a staggered manner, depending on conditions Can also be provided so as to protrude in three or four directions from the three or four sides of the main body shaft portion 8. In the case of this example, the support flanges 9 are arranged at predetermined intervals such as equal intervals on one side, and are parallel to each other. The attachment hole 22 may be formed so as to face obliquely upward along an axis that faces obliquely upward of the support collar portion 9.
[0016]
The air from the branch pipes 19 of each support collar 9 can escape upward via the main body pipe 18 of the main body shaft portion 8, and the upper end opening 27 of the main body shaft portion 8 is formed as a ventilation discharge portion (air discharge port). ) On the other hand, the lower end portion of the main body shaft portion 8 is closed by the closing portion 20, and the closing portion 20 is formed with a liquid discharge throttle hole 21 that doubles as a liquid discharge portion and a throttle portion. Then, the liquid that has entered the main body pipe 18 of the main body shaft portion 8 is discharged downward from the liquid discharge throttle hole 21 when the immersion holder 7 is raised.
[0017]
FIG. 7 shows more specifically the immersion holder 7 from which the insulating layer 35 is omitted. A bus bar 23 serving as an electrode member is fixed to a surface of the main body shaft portion 8 that is 90 degrees different from a surface on which the support flange 9 and the like are fixed. The bus bar 23 has a longitudinal shape having substantially the same length as the main body shaft portion 8, and a hook-shaped energization connecting portion 23 a (see also FIG. 10) is formed substantially corresponding to the upper end portion of the main body shaft portion 8. The energization connecting portion 23a is connected to an energizing electrode portion (not shown) (for example, installed in the connecting portion 15 in FIG. 4). At this time, in order to ensure electrical contact between the energization electrode portion and the bus bar 23, a spring member 24 made of a conductive material is fixed to the outer surface of the bus bar 23, and between the spring member 24 and the energization connection portion 23a, The other party's energizing electrode part enters, and it will be in an electrical contact state. In this example, in order to fix such a bus bar 23 to the main body shaft portion 8, a plurality of fixing brackets 32 are provided at predetermined intervals in the longitudinal direction, and the bus bar 23 is attached to the main body shaft portion 8 by these fixing brackets 32. Fixed to. Further, a hook portion 26 is fixed to the upper end portion of the main body shaft portion 8 so as to be back-to-back with the hook-shaped current-carrying connection portion 23a of the bus bar 23, and the hook portion 26 is stored or transported when necessary. Is used. Of course, other structures may be employed as the structure of the current-carrying connection portion 23 a of the bus bar 23 and the structure for fixing to the main body shaft portion 8.
[0018]
Here, the elastic pressing portion 10 constitutes an integral part in which a pair of portions protruding obliquely upward from both sides of the main body shaft portion 8 are connected by the connecting portion 25 and opened upward. The connecting portion 25 is fixed to the bus bar 23 in a state of being in electrical contact with the fixing bracket 31. The fixing bracket 31 is fixed to the bus bar 23 by welding or the like in a state where the connecting portion 25 of the component of the elastic pressing portion 10 is crimped to the bus bar 23. As shown in FIG. 9, the parts constituting the elastic pressing portions 10 on both sides as described above have a box-shaped cross section in which the connecting portion 25 fits the bus bar 23 and the main body shaft portion 8, and the portion is shown in FIG. Thus, the bus bar 23 and the main body shaft portion 8 are fixed so as to straddle, and the elastic pressing portion 10 is positioned in substantially the same vertical plane as the support flange portion 9 from both ends of the connecting portion 25 so as to be supported. It faces the flange 9 in close proximity. Thus, in this example, since the elastic pressing part 10 which opposes on both sides of the main-body shaft part 8 has an integral structure via the connection part 25, manufacture is simple and strong compared with the case where it fixes individually. Also excellent.
[0019]
The elastic pressing part 10 is provided with a mountain-shaped or curved protruding part 30 which swells in the middle part of the elastic pressing part 10 on the opposite side (outside) to the direction opposite to the support collar part 9, and this protruding part 30 is the cap nut 1 of FIG. It will be pressed from the inner side to the female threaded portion 4. Further, in this example, the support collar 9 is also formed with a chevron-shaped or curved projecting portion 29 projecting to the opposite side (outside) of the opposing direction to the elastic pressing portion 10. The protrusions 30 of the parts 10 are close to each other so as to face each other. When the cap nut 1 shown in FIG. 1 is inserted into the support flange 9 and the elastic pressing portion 10, for example, the inner surface of the female screw portion 4 of the cap nut 1 comes into contact with the protruding portion 30 of the elastic pressing portion 10. The elastic pressing portion 10 is moved inward while being elastically deformed inward, and the protruding portion 29 of the support collar 9 is also pressed against the inner surface of the female screw portion 4 by the reaction of the elastic force of the elastic pressing portion 10. The nut 1 is held by the support flange portion 9 and the elastic pressing portion 10 with substantially no play.
[0020]
In addition, the protrusion part 29 of the support collar part 9 is abbreviate | omitted, and it can also be set as the linear pipe-shaped support collar part 9 as shown in FIG.7 (c). In this case, the outer surface on the upper side of the support flange 9 is brought into full or partial contact with the inner surface of the female screw portion 4 of the cap nut 1 along a straight line to support the cap nut 1. Further, the mounting hole 22 formed in the side wall of the main body shaft portion 8 is formed in a direction orthogonal to the axis of the main body shaft portion 8, and the proximal end bent portion 33 is formed in the base end portion of the support collar portion 9. And it can also be made to fix to the attachment hole 22 with this base end curved part 33. FIG.
[0021]
FIG. 8 shows an example of the form of the support collar 9, and the support collar 9 of FIG. 8A is a type in which the base end portion is fitted into a mounting hole 22 formed obliquely in the main body shaft portion 8. (B) is inserted into the mounting hole 22 formed in the base end curved portion 33 at a right angle (for example, in the horizontal direction) to the main body shaft portion 8. In any case, regardless of whether or not the protruding portion 29 is formed at the intermediate portion of the support flange 9, the branch pipe 19 inside the support flange 9 is continuous from the base end to the tip. is there.
[0022]
Further, the tip of the support collar 9 may be perpendicular to its axis as shown in FIG. 11 (b), but the tip of the branch pipe 19 with the tip as an inclined tip 28 as shown in FIG. 11 (a). It is also possible to provide the opening so as to open upward in a substantially horizontal state. By using the inclined tip 28 as described above, the opening position of the branch pipe 19 of the support collar 9 can be positioned as high as possible. When the surface rises, it is possible to delay the entry of the liquid into the support flange 9 as much as possible, so that a larger area of the inner surface of the cap nut 1 can be immersed in the liquid. Further, for example, even if the tip of the support collar 9 is brought into contact with the cap 3 of FIG. 1, the tip opening of the support collar 9 is not in close contact with the cap 3 due to the inclined tip 28. It becomes difficult to be blocked.
[0023]
As shown in FIG. 12, the relationship between the support collar 9 and the elastic pressing part 10 is that the support collar 9 is located on the upper side and has a protrusion 29 as shown in FIG. A form in which the protruding part 30 is formed in the part 10, a form in which the vertical positional relationship is reversed as in (b), a form in which the support collar part 9 is linear and located on the upper side as in (c), As shown in (d), the support collar 9 may be linear and positioned on the lower side. Furthermore, as shown in (e) and (f), the elastic pressing portion can also be made of a pipe material, which can be used as the support flange portion 9. In this case, since one or both of the support collars 9 also serve as the elastic pressing portion 10, it can be considered that the elastic pressing portion 10 is formally omitted.
[0024]
As shown in FIGS. 12 (e) and 12 (f), each support collar 9 is in the form of a pipe, so that air can escape through the inside of both support collars 9. In the example of (e), the upper support collar 9 is linear and the lower support collar 9 has a protruding portion 29 in the middle thereof, and in (f), both the upper and lower sides are respectively It is an example which has the protrusion part 29 and is mutually formed symmetrically with respect to the intermediate line of both. Further, when used as an immersion holder in an electrolytic plating bath, as shown in FIG. 13, the immersion holder 7 becomes one electrode, and therefore the elastic pressing portion 10 is branched from the bus bar 23 in FIG. A voltage is applied to each of the elastic pressing portions 10 using the electrodes, and the cap nut 1 that is in electrical contact with the elastic pressing portions 10 becomes, for example, a negative pole, and electrolytic plating is performed. In this example, since the main body shaft portion 8 and the support flange portion 9 are both made of metal, they can also function as electrodes.
[0025]
Moreover, in FIG.12 (e) and (f), the one or both support collar part 9 will play the role of an electrode. On the other hand, if it is a simple immersion plating that does not perform electrolysis, or a holder dedicated to immersion in a rust preventive solution, a degreasing solution, or a cleaning solution, no electrode is required. In this case, the entire immersion holder 7 is made of resin. It can also be comprised with insulating materials, such as. However, since the immersion holder used in the process line including the electroplating tank normally passes through the degreasing tank, the acid electrolysis tank, the electrolytic plating tank, the washing tank, etc. as described above, it is necessary to use a general-purpose holder. What has the structure which functions as an electrode, such as the above-mentioned bus bar 23 and the elastic pressing part 10 as a branch electrode, will be used.
[0026]
FIG. 14 schematically shows an immersion holder 7 which is an example of the present invention and explains its operation. As shown to (a), an electricity supply path branches to each elastic press part 10 via the bus bar 23 with which the electricity supply electrode part like the said connection part 15 is mounted | worn. On the other hand, an air passage that leads from the branch pipe 19 of each support collar 9 to the main pipe 18 of the main shaft 8 is formed. In other words, a plurality of branch pipes 19 communicate with the main body pipe 18 in parallel.
[0027]
Here, the main body shaft portion 8 is made of, for example, a square pipe material made of stainless steel, and the bus bar 23 is made of a highly conductive material, such as a copper plate, which is excellent as an electrode material. Similarly, a stainless steel pipe having corrosion resistance and conductivity is suitably used for the support collar portion 9, and a copper rod is suitably used for the elastic pressing portion 10. The base shaft portion of the main body shaft 8, the bus bar 23, the support collar 9, and the elastic pressing portion 10 is coated with a resin or the like as an insulation coating so that unnecessary current does not flow and a plating layer is not formed. A layer (insulating layer) 35 is formed (see FIG. 5). In addition, when the main body shaft portion 8 and the support collar portion 9 have sufficient functions and structures as electrodes, the bus bar 23 is not necessarily provided separately.
[0028]
When the immersion holder 7 holding a large number of cap nuts 1 is immersed in the electrolytic plating tank 12 as shown in FIG. 13, the holding tank 7 side is, for example, a negative electrode, and the counter electrode 36 is, for example, a positive electrode. 12 is arranged. In the process of immersing the holder 7 in the liquid bath 12 such as an electrolytic plating bath, the branch pipes 19 are formed in the support collars 9 as shown in FIG. The air confined in the closed space of the cap nut 1 is released to the outside through the pipe lines 19 and 18 in accordance with the relative rise of the liquid level.
[0029]
FIG. 14B shows a process in the middle of immersion. When the immersion holder 7 starts immersion, the liquid is discharged from the liquid discharge throttle hole 21 formed in the lower portion of the main body shaft portion 8. The main body pipe 18 is entered. However, resistance is given to the ingress of the liquid by the throttling effect of the liquid discharge throttling hole 21, so that the relative liquid level in the main body pipe line 18 and the external liquid level of the immersion holder 7 are relatively increased. And a gap h occurs. Air confined in the closed space of the cap nut 1 due to the throttling effect of the liquid discharge throttling hole 21 (in other words, the difference in h generated in the dipping process between the liquid level of the main body pipe 18 and the liquid level of the liquid tank). The liquid level in the main body pipe 18 rises to the proximal end side opening position of the branch pipe 19 after the liquid escapes and the liquid flows from the front end opening of the branch pipe 19. That is, the liquid level rises relatively in the process of immersion of the immersion holder 7 and the liquid enters the closed space of the cap nut 1 and closes the opening of the space. Since the main pipe line 18 communicates with the main body pipe line 18 through the branch pipe line 19, the air in the same space is allowed to escape through these pipe lines 19 and 18, thereby allowing the liquid level to rise in the same space. Then, until the liquid level reaches the distal end opening of the branch conduit 19 and the liquid flows into the branch conduit 19 through the distal end opening, the opening on the main body conduit 18 side of the support collar 9 is not. Since it is not blocked by the liquid, the liquid level is allowed to rise reliably up to the position of the opening of the branch pipe 19 in the bag-like space, and therefore the inner surface of the cap nut 1 is reliably immersed in the liquid up to the height position. Will be.
[0030]
Here, if there is no difference h between the liquid level of the main body pipe 18 and the liquid level of the liquid tank, when the proximal end side opening of the branch pipe 19 is closed with liquid, Since the main pipe line 18 is blocked, the flow of air that tends to escape from the closed space of the cap nut 1 to the main pipe line 18 via the branch pipe line 19 is cut off, so that the liquid level in the bag-like space is It will not rise any more.
[0031]
As shown in FIG. 15A, when the immersion holder 7 is completely immersed in the liquid tank 12 and stabilized, the liquid level of the liquid tank and the liquid level of the main body pipe line 18 are at the same level. In other words, after the air in the closed space of the cap nut 1 has escaped from the branch pipes 19 of the support flanges 9, the liquid enters the branch pipes 19 to fill the branch pipes 19, and the branches The main body pipe 18 is also filled with liquid by the liquid flowing in from the pipe 19 and the liquid entering from the liquid discharge throttle hole 21.
[0032]
As shown in FIG. 15 (b), when the immersion holder 7 is lifted from such a state and pulled up from the liquid tank 12, the liquid present in the branch pipes 19 of the support collars 9 becomes the main pipe 18. In addition, the liquid in the main body pipe 18 flows down through the liquid discharge throttle hole 21, and finally the liquid in the branch pipe 19 and the main body pipe 18 is discharged together. The size of the liquid discharge throttle hole 21 is set to a size according to conditions such as the descent / rise speed of the immersion holder 7 and the viscosity of the liquid in order to satisfy both the throttling function and the discharge function described above. It will be.
[0033]
As the liquid discharge throttle hole 21, for example, as shown in FIG. 16A, a simple hole 21 formed in the closing portion 20 of the main body shaft portion 8, and a lower end portion of the main body shaft portion 8 as shown in FIG. Alternatively, a tapered portion like the inclined surface 37 may be formed, and the hole 21 provided at the lower end thereof may be used. Furthermore, as shown in (c), a thin tube portion 38 may be integrally provided at the lower end portion of the main body shaft portion 8, and the conduit of the thin tube portion 38 may be used as the liquid discharge throttle hole 21. In this case, as shown in (d), the upper side of the narrow tube portion 38 is formed into a tapered slope 37, and the liquid discharge throttle hole 21 can be formed in the lower portion in a so-called funnel shape. By having a funnel shape or a taper shape as shown in (d) (this is also true for (b)), an effect that the liquid easily flows down is produced.
[0034]
Furthermore, as shown in (e), a plurality of liquid discharge throttle holes 21 can be formed. Further, as shown in (f), the throttle part 40 can be provided separately from the liquid discharge part 41. In this case, a pipe portion having a smaller cross-sectional area than other portions is formed in the middle portion of the main body pipe line 18 of the main body shaft portion 8, and the inside thereof is used as the throttle portion 40, and the liquid discharge portion 41 is the lower end portion of the main body shaft portion 8 In addition, the cross-sectional area similar to that of the main body pipe line 18 can be formed. As shown in (g), the closing portion 20 can be provided as a separate member that can be attached to and detached from the main body shaft portion 8. If it is possible to detach and attach in this way, cleaning in the main body pipe line 18 can be easily performed.
[0036]
Further, in the above description, the bag nut 1 is taken as an example of the bag-like workpiece, but the invention is not limited to this. For a workpiece of a type that has a bag-like space and air is trapped when immersed in the liquid tank. The present invention can be applied to all.
[Brief description of the drawings]
FIG. 1 is a view showing a cap nut as an example of a bag-like workpiece in which an immersion holder according to the present invention is used.
FIG. 2 is a view showing a state in which a bag-like workpiece is attached to the immersion holder of the present invention.
FIG. 3 is a diagram illustrating an operation of immersing it in a predetermined liquid tank.
FIG. 4 is a diagram illustrating an example of a process of repeating immersion along a conveyance line.
FIG. 5 is a front view showing an example of the immersion holder according to the present invention.
FIG. 6 is a view showing a form in which a support collar is connected to a main body shaft portion with pipe members.
FIG. 7 is a view more specifically showing the immersion holder of the present invention.
FIG. 8 is a diagram showing an example of a support collar part.
FIG. 9 is a diagram illustrating an example of a part of an elastic pressing portion.
FIG. 10 is a diagram showing an example of a bus bar.
FIG. 11 is a diagram showing an example of a tip shape of a support collar portion.
FIGS. 12A and 12B are diagrams showing some examples of combinations of a support hook portion and an elastic pressing portion. FIGS.
FIG. 13 is a view showing an example in which the immersion holder of the present invention is used in an electrolytic plating tank.
FIG. 14 is a diagram conceptually showing a cross section of an example of the immersion holder according to the present invention and explaining a state when descending to a liquid tank.
FIG. 15 is a diagram conceptually showing an example of the immersion holder of the present invention in a cross section, and explaining the state of immersion in the liquid tank and the state of rising from the liquid tank.
FIG. 16 is a diagram showing some examples of a liquid discharge throttle hole or throttle part;.
[Explanation of symbols]
1 Cap nut
5 Bag-shaped space (closed space)
7 Immersion holder
8 Body shaft
9 Support collar
10 Elastic pressing part
12 Liquid tank
13 Transport line
18 Main body pipeline
19 Branch line
21 Liquid discharge throttle hole
23 Busbar
27 Upper opening
29, 30 Projection
35 Insulating layer (coating layer)
40 Aperture
41 Liquid discharge part

Claims

A workpiece immersion holder that holds a plurality of bag-shaped workpieces having a bag-shaped space and is immersed in a liquid tank together with the workpieces,
The work immersed retainer comprises a body shaft portion extending in a longitudinal shape in the elevation direction, a support rod extending manner enters the bag-like space from the opening of the bag-shaped workpiece,
The branch with respect to the main shaft unit, a plurality of supporting beam portion connected so as to face obliquely upward at a predetermined interval, at least a portion of the bag-like space to the opening of the bag-shaped workpiece It supports a respective bag-shaped workpiece in position on the upper side,
Pipe lines for letting out the air trapped between the liquid level of the liquid flowing in from the opening of the bag-like workpiece and the bag-like space when immersed in the liquid tank are formed in the main body shaft portion and the support collar portion. And continuously formed ,
A liquid discharge that discharges the liquid that has flowed into the conduit for escaping air from the bag-shaped space of the bag-like work to the outside by the immersion in the liquid tank when the work immersion holder is lifted from the liquid tank. A portion is provided in communication with the pipe line;
The liquid discharge part is formed by a throttle part, and the throttle part is given resistance to the ingress of liquid in the process in which the workpiece immersion holder is immersed in the liquid tank,
Until the air in the bag-like space of the bag-like work has escaped from the pipe line of the main body shaft part via the pipe line of the support collar part, the throttle part flows into the pipe line of the main body shaft part. The bag-shaped workpiece immersion holder is characterized in that the bag is allowed to be delayed and thereafter the pipe is allowed to fill with liquid .

The pipe formed in the main body shaft portion constituting the workpiece immersion holder has a liquid discharge hole having a cross section smaller than the pipe cross section of the pipe, and the liquid discharge hole includes the liquid discharge portion and the throttle. The bag-shaped workpiece immersion holder according to claim 1, which also serves as a portion .

The main body shaft portion is made of a pipe material, and the support flange portion, which is also made of a pipe material, is connected to the main body shaft portion so as to form a pipe line communicating with each other, and the main body shaft portion. The upper opening of the bag-like work is a ventilation discharge part, and air in the bag-like space of the bag-like work is released through the upper opening, while the lower end part of the main body shaft part is closed, and a liquid discharge hole is formed in the closed part. The bag-shaped workpiece immersion holder according to claim 2, wherein the bag discharge workpiece and the throttle portion are formed.

The support collar is formed in a pipe shape, and the inside of the support collar is the pipe or the branch pipe. A linear or plate-like elastic pressing part that is elastically deformable in parallel is provided below the support collar. In the state of being provided and holding the bag-shaped workpiece, the support collar portion and the elastic pressing portion enter the bag-shaped space from the opening of the bag-shaped workpiece, and the elastic pressing portion is in an elastically deformed state in the bag-shaped space. By pressing the inner surface of the bag-shaped space, the support flange is also pressed against the inner surface of the bag-shaped space by the reaction force, and at least a part of the bag-shaped space is positioned above the opening of the bag-shaped workpiece. The bag-shaped workpiece immersion holder according to any one of claims 1 to 3 , wherein the bag-shaped workpiece is supported in a posture to perform .

The liquid tank is an electroplating liquid tank, and one electrode is provided on the main body shaft portion, and at least one of the support flange portion and the elastic pressing portion is formed of a conductive material and is electrically connected to the electrode. The bag-shaped workpiece immersion holder according to claim 4 , wherein the bag-shaped workpiece is a branched electrode .

The liquid tank is an electroplating liquid tank, and one electrode is provided on the main body shaft portion, and a current-carrying portion is integrally formed in a longitudinal shape along the main body shaft portion from the electrode. The elastic pressing portion is provided as a branch electrode and is electrically connected to the energizing portion so as to branch from the main body shaft portion including the energizing portion, and the base end of the support collar and the elastic pressing portion. The bag-shaped workpiece immersion holder according to claim 4 or 5 , wherein the side is covered with a coating layer having corrosion resistance and electrical insulation .

The bag holder according to any one of claims 1 to 4 , wherein the liquid tank is an electroless plating liquid tank, a rust prevention liquid tank, a degreasing liquid tank, or a cleaning liquid tank .

The bag-shaped workpiece immersion holder according to any one of claims 1 to 7, wherein the bag-shaped workpiece is a cap nut .