JP6697210B2 - Inner surface electrode for inner surface plating of tubular article - Google Patents

Inner surface electrode for inner surface plating of tubular article Download PDF

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JP6697210B2
JP6697210B2 JP2016105995A JP2016105995A JP6697210B2 JP 6697210 B2 JP6697210 B2 JP 6697210B2 JP 2016105995 A JP2016105995 A JP 2016105995A JP 2016105995 A JP2016105995 A JP 2016105995A JP 6697210 B2 JP6697210 B2 JP 6697210B2
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surface electrode
electrode wire
tubular article
plating
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JP2017210667A (en
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智之 近藤
智之 近藤
一平 松田
一平 松田
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FTS Co Ltd
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Description

本発明は、管状物品の内面に電気めっきを施すために使用される内面めっき用の内面電極に関するものである。特に、長尺の管状物、例えば自動車のフィラーパイプ等の内面に電気めっきを施すために管状物品の内部に挿入されて使用される管状物品の内面めっき用の内面電極に関するものである。 The present invention relates to an inner electrode for inner plating used for electroplating the inner surface of a tubular article. In particular, the present invention relates to an inner surface electrode for inner surface plating of a tubular article which is used by being inserted inside a tubular article for electroplating the inner surface of a long tubular object such as an automobile filler pipe.

従来、金属製の物品に電気めっきを施すには、めっき槽内のめっき液に電極と被めっき物を浸漬して、電極を陽極、被めっき物を陰極にしてその間に通電して、めっき液中のイオン化した金属を被めっき物に析出させめっきを行っていた。
しかしながら、長尺の管状物品の内面側では、電気の流れが悪く、管状物品の内面へのめっき金属の析出状態はよくなかった。 Conventionally, for electroplating a metal article, an electrode and an object to be plated are immersed in a plating solution in a plating tank, an electrode is used as an anode and an object to be plated is a cathode, and current is applied between them to form a plating solution. Ionized metal was deposited on the object to be plated for plating.
However, on the inner surface side of the long tubular article, the flow of electricity was poor, and the deposited state of the plated metal on the inner surface of the tubular article was not good.

そのため、図１に示すように、フィラーパイプ１２０の内部に内面電極１１０を挿入し、内面電極１１０により、フィラーパイプ１２０の内面をめっきしている。この内面電極１１０は、図６に示すように、ハンガーに取付ける内面電極接続部１１６と内面電極線１１１を有している。 Therefore, as shown in FIG. 1, the inner surface electrode 110 is inserted inside the filler pipe 120 and the inner surface of the filler pipe 120 is plated by the inner surface electrode 110. As shown in FIG. 6, this inner surface electrode 110 has an inner surface electrode connecting portion 116 and an inner surface electrode wire 111 to be attached to a hanger.

内面電極線１１１は、フィラーパイプ１２０の屈曲に沿って屈曲可能に形成されており、導電性の金属線を編み込んだワイヤーで形成されている。内面電極線１１１の表面は、内面電極線１１１がフィラーパイプ１２０の内面に接触することがないように、ナイロン等の非導電性の合成樹脂糸１１７で網目状に覆われている。このため、めっき液２と内面電極線１１１は接触して、内面電極線１１１とフィラーパイプ１２０の内面との間で、電流が流れるように形成されている（例えば、特許文献１参照。）。 The inner surface electrode wire 111 is formed to be bendable along the bending of the filler pipe 120, and is formed of a wire in which a conductive metal wire is woven. The surface of the inner surface electrode wire 111 is covered with a non-conductive synthetic resin thread 117 such as nylon in a mesh shape so that the inner surface electrode wire 111 does not contact the inner surface of the filler pipe 120. Therefore, the plating solution 2 and the inner surface electrode wire 111 are in contact with each other, and a current is formed between the inner surface electrode wire 111 and the inner surface of the filler pipe 120 (see, for example, Patent Document 1).

図７に示すように、フィラーパイプ１２０をめっき液２に浸漬して、内面をめっきする時には、内面電極１１０に電気を給電するため、内面電極接続部１１６に電源から給電していた。この場合には、フィラーパイプ１２０のような管状物品の内面をめっきするときに、内面電極１１０の内面電極線１１１の根元部１１２（図７において点線で囲みＡで示す部分）が、電気が流れやすい。特に、フィラーパイプ１２０のように、入口側に内面に張り出すフランジ部を有する場合には、内面電極線１１１との間隔が狭くなり、一層電気が流れやすい。 As shown in FIG. 7, when the filler pipe 120 was dipped in the plating solution 2 to plate the inner surface, electricity was supplied to the inner surface electrode 110 from the power supply in order to supply electricity to the inner surface electrode 110. In this case, when the inner surface of the tubular article such as the filler pipe 120 is plated, electricity flows through the root portion 112 of the inner surface electrode wire 111 of the inner surface electrode 110 (a portion surrounded by a dotted line in FIG. 7 and indicated by A). Cheap. In particular, in the case where the filler pipe 120 has a flange portion that projects to the inner surface on the inlet side, the gap between the inner surface electrode wire 111 and the inner surface becomes narrower, and electricity flows more easily.

この場合には、図８に示すように、内面電極線１１１の根元部１１２の陽極反応が大きくなり、根元部１１２のみが過剰にめっき液２に溶解して内面電極線凹部１１１ａが生じて、内面電極線１１１が破断してしまうこととなる。
内面電極線１１１の根元部１１２以外の部分は、溶解はほとんど見られず、根元部１１２のみの溶解により、内面電極線１１１の寿命が短くなってしまうこととなる。 In this case, as shown in FIG. 8, the anodic reaction of the root portion 112 of the inner surface electrode wire 111 becomes large, and only the root portion 112 is excessively dissolved in the plating solution 2 to form the inner surface electrode wire recess 111a. The inner surface electrode wire 111 will be broken.
Almost no melting is seen in the portion other than the root portion 112 of the inner surface electrode wire 111, and the melting of only the root portion 112 shortens the life of the inner surface electrode wire 111.

特開２０１１−２１９８１１号公報JP, 2011-219811, A

そのため、本発明は、長尺の管状物品の内面をめっきする、寿命の長い管状物品の内面めっき用の内面電極を提供することを課題とする。   Therefore, an object of the present invention is to provide an inner electrode for plating the inner surface of a long tubular article, which has a long life and is used for inner surface plating of the tubular article.

上記課題を解決するための請求項１の本発明は、管状物品に電気めっきを行うときに、該管状物品の内面に電気めっきを施すために上記管状物品の内部に挿入されて使用される管状物品の内面めっき用の内面電極において、
内面電極は、可撓性を有し、ステンレススチール製の多数のワイヤーを編んで形成され、電源と接続する内面電極接続部と、導電体で形成される長尺状の内面電極線を有し、内面電極線は、内面電極線とめっき液が接触する部分で、且つ、管状物品の入口部に近接した内面電極線の部分に、導電性のステンレススチール製の内面電極線カバー部材を取付けたことを特徴とする管状物品の内面めっき用の内面電極である。 The present invention according to claim 1 for solving the above-mentioned problems, when performing tubular electroplating on a tubular article, is used by inserting the tubular article inside to tubularly electroplate the tubular article. In the inner surface electrode for inner surface plating of the article,
The inner surface electrode is flexible and is formed by knitting a number of stainless steel wires, and has an inner surface electrode connecting portion for connecting to a power source and a long inner surface electrode wire formed of a conductor. The inner surface electrode wire is a portion where the inner surface electrode wire comes into contact with the plating solution, and the inner surface electrode wire cover member made of conductive stainless steel is attached to the portion of the inner surface electrode wire that is close to the inlet of the tubular article . It is an inner surface electrode for inner surface plating of a tubular article characterized by the above.

請求項１の本発明では、内面電極は、電源と接続する内面電極接続部を有するため、内面電極接続部をめっきハンガー等に取付けることにより、内面電極接続部を経由して内面電極線に電流を流すことができる。 According to the first aspect of the present invention, since the inner surface electrode has the inner surface electrode connecting portion that is connected to the power source, by attaching the inner surface electrode connecting portion to a plating hanger or the like, the inner surface electrode connecting portion is connected to the inner surface electrode wire with a current. Can be drained.

内面電極は、内面電極は、導電体で形成される長尺状の内面電極線を有する。このため、長尺の管状物品の全長に亘り挿入されて、管状物品の内面に電流を確実に流すことができ、管状物品の内面の全長に亘り内部にめっきを施すことができる。。
内面電極線は、可撓性を有し、金属製の多数のワイヤーを編んで形成されている。このため、管状物品が屈曲して形成されていても、内面電極は屈曲に沿って柔軟に変形して、長尺の管状物品の全長に亘り挿入されることができ、管状物品の内面の全長に亘りめっきを施すことができる。
金属製の多数のワイヤーを編んで形成されているため、所定の剛性を有して、管状物品の先端まで挿入することが容易であり、導電性を有するとともに耐久性に優れている。
内面電極線は、ステンレススチール製であるため、内面電極線は、さびにくく、めっき液や他の薬品にも腐食されにくく、耐久性に優れている。 The inner surface electrode has an elongated inner surface electrode wire formed of a conductor. Therefore, the long tubular article can be inserted over the entire length of the tubular article so that an electric current can be reliably applied to the inner surface of the tubular article, and plating can be applied to the inner surface of the tubular article over the entire length thereof. .
The inner electrode wire has flexibility and is formed by braiding a large number of metal wires. Therefore, even if the tubular article is formed by bending, the inner surface electrode is flexibly deformed along the bending and can be inserted over the entire length of the long tubular article. Can be plated over the entire length.
Since it is formed by braiding a large number of metal wires, it has a predetermined rigidity, can be easily inserted up to the tip of the tubular article, and has electrical conductivity and excellent durability.
Since the inner surface electrode wire is made of stainless steel, the inner surface electrode wire is less likely to rust, is less likely to be corroded by the plating solution and other chemicals, and has excellent durability.

内面電極線は、内面電極線とめっき液が接触する部分で、且つ、管状物品の入口部に近接した内面電極線の部分に、導電性のステンレススチール製の内面電極線カバー部材を取付けている。このため、内面電極線の電流が多く流れる部分において、フィラーパイプ等の管状物品の入口部が狭く形成されていたり、入口部に構造物が設けられていたりする場合においても、内面電極線の根元部分の溶解を防止して、内面電極線カバー部材が内面電極線よりも先に溶解して、内面電極線の溶解を防止して、内面電極線の破断を防止して、内面電極線の寿命を長くすることができる。
内面電極線カバー部材は、ステンレススチール製であるため、導電性を有して、めっき液や他の薬品にも腐食されにくく、剛性を有し、耐久性に優れている。 The inner surface electrode wire is a portion where the inner surface electrode wire comes into contact with the plating solution, and the inner surface electrode wire cover member made of conductive stainless steel is attached to the portion of the inner surface electrode wire that is close to the inlet of the tubular article . .. Therefore, in a portion where flows more current of the inner surface electrode line, or have an inlet portion of the tubular article such as a full Irapaipu is formed narrow, even when they happen to structures provided in the inlet section, the base of the inner surface electrode line Prevents the melting of parts, the inner surface electrode wire cover member melts before the inner surface electrode wire, prevents the inner surface electrode wire from melting, prevents the inner surface electrode wire from breaking, and the life of the inner surface electrode wire Can be lengthened.
Since the inner surface electrode wire cover member is made of stainless steel, it has conductivity, is less likely to be corroded by the plating solution and other chemicals, has rigidity, and is excellent in durability.

請求項２の本発明は、内面電極線と内面電極線カバー部材は、共にステンレススチール３１６（ＳＵＳ３１６）製である管状物品の内面めっき用の内面電極である。 According to the present invention of claim 2 , the inner surface electrode wire and the inner surface electrode wire cover member are both inner surface electrodes for inner surface plating of a tubular article made of stainless steel 316 (SUS316).

請求項２の本発明では、内面電極線と内面電極線カバー部材は、共にステンレススチール３１６（ＳＵＳ３１６）製であるため、特に耐腐食性に優れて、耐久性に優れている。内面電極線と内面電極線カバー部材は、同じステンレススチール３１６（ＳＵＳ３１６）製であるため、内面電極線カバー部材から確実に溶解させることができる。 According to the second aspect of the present invention, since both the inner surface electrode wire and the inner surface electrode wire cover member are made of stainless steel 316 (SUS316), they are particularly excellent in corrosion resistance and durability. Since the inner surface electrode wire and the inner surface electrode wire cover member are made of the same stainless steel 316 (SUS316), they can be reliably melted from the inner surface electrode wire cover member.

請求項３の本発明は、内面電極線カバー部材は、肉厚が０．５〜１．５ｍｍである管状物品の内面めっき用の内面電極である。 According to the present invention of claim 3 , the inner surface electrode wire cover member is an inner surface electrode for inner surface plating of a tubular article having a wall thickness of 0.5 to 1.5 mm.

請求項３の本発明では、内面電極線カバー部材は、肉厚が０．５〜１．５ｍｍであるため、内面電極線カバー部材を内面電極線に、かしめ等により取付けることが容易であるとともに、内面電極線カバー部材がメッキ液に溶解する時間を長くすることができ、内面電極の寿命を長くすることができる。肉厚が０．５ｍｍ未満の場合には、内面電極線カバー部材がメッキ液に溶解する時間が短くなり、内面電極線１１に寿命が短くなり、肉厚が１．５ｍｍを超える場合には、内面電極線カバー部材を内面電極線に取付けにくくなる。 According to the present invention of claim 3 , since the inner electrode wire cover member has a wall thickness of 0.5 to 1.5 mm, it is easy to attach the inner electrode wire cover member to the inner electrode wire by caulking or the like. The time for the inner surface electrode wire cover member to dissolve in the plating solution can be lengthened, and the life of the inner surface electrode can be lengthened. When the wall thickness is less than 0.5 mm, the time taken for the inner surface electrode wire cover member to dissolve in the plating solution is shortened, the life of the inner surface electrode wire 11 is shortened, and when the wall thickness exceeds 1.5 mm, It becomes difficult to attach the inner surface electrode wire cover member to the inner surface electrode wire.

請求項４の本発明は、管状物品は、屈曲して形成された管状物品の内面めっき用の内面電極である。 According to a fourth aspect of the present invention, the tubular article is an inner surface electrode for inner surface plating of a tubular article formed by bending.

請求項４の本発明では、管状物品は、屈曲して形成されたため、管状物品の屈曲に沿って可撓性を有する内面電極線を内部に挿入して、屈曲した管状物品の内面の全長に亘りめっきすることができる。 According to the present invention of claim 4 , since the tubular article is formed by being bent, the inner surface electrode wire having flexibility is inserted into the inside of the tubular article along the bending of the tubular article, and the entire length of the inner surface of the bent tubular article is obtained. It can be plated over.

請求項５の本発明は、管状物品は、自動車の燃料タンクに燃料を供給するフィラーパイプであり、内面電極線カバー部材は、電気めっき時にフィラーパイプの入口部に近接するように取付けられる管状物品の内面めっき用の内面電極である。 According to the present invention of claim 5 , the tubular article is a filler pipe for supplying fuel to a fuel tank of an automobile, and the inner surface electrode wire cover member is attached so as to be close to an inlet portion of the filler pipe during electroplating. Is an inner surface electrode for inner surface plating.

請求項５の本発明では、管状物品は、自動車の燃料タンクに燃料を供給するフィラーパイプであり、内面電極線カバー部材は、電気めっき時にフィラーパイプの入口部に近接するように取付けられている。このため、三次元的に屈曲したフィラーパイプにおいても内部を確実にめっきすることができるとともに、フィラーパイプの入口部にリテーナ等を取付けて入口部が狭くなっても、内面電極線カバー部材により内面電極の寿命を長くすることができる。 According to the present invention of claim 5 , the tubular article is a filler pipe for supplying fuel to a fuel tank of an automobile, and the inner electrode wire cover member is attached so as to be close to an inlet portion of the filler pipe during electroplating. .. Therefore, the inside of the three-dimensionally bent filler pipe can be reliably plated, and even if the inlet is narrowed by attaching a retainer or the like to the inlet of the filler pipe, the inner surface is covered by the inner electrode wire cover member. The life of the electrode can be extended.

内面電極線は、内面電極線とめっき液が接触する部分で、且つ、電流が内面電極線の他の部分よりも多く流れる部分の外面に導電性の内面電極線カバー部材を取付けているため、内面電極線カバー部材が内面電極線よりも先に溶解して、内面電極線の溶解を防止して、内面電極線の破断を防止して、内面電極線の寿命を長くすることができる。 The inner surface electrode wire is a portion where the inner surface electrode wire and the plating solution come into contact with each other, and since a conductive inner surface electrode wire cover member is attached to the outer surface of the portion where the current flows more than other portions of the inner surface electrode wire, The inner surface electrode wire cover member is melted before the inner surface electrode wire to prevent the inner surface electrode wire from being melted, the inner surface electrode wire is prevented from breaking, and the life of the inner surface electrode wire can be extended.

本発明の実施の形態で使用するめっき装置の概念図である。It is a conceptual diagram of the plating device used in the embodiment of the present invention. 本発明の実施の形態で使用するめっきハンガーの側面図である。It is a side view of the plating hanger used in the embodiment of the present invention. 本発明の実施の形態で使用する内面電極を管状物品に挿入した状態の断面図である。It is sectional drawing of the state which inserted the inner surface electrode used in embodiment of this invention into a tubular article. 本発明の実施の形態である内面電極に内面電極線カバー部材を取付けた状態の内面電極線の部分断面図である。It is a fragmentary sectional view of an inner surface electrode wire in the state where an inner surface electrode wire cover member was attached to an inner surface electrode which is an embodiment of the invention. 本発明の実施の形態である内面電極に内面電極線カバー部材を取付けて内面電極線カバー部材が溶解した状態の内面電極線の部分断面図である。FIG. 6 is a partial cross-sectional view of the inner surface electrode wire in a state where the inner surface electrode wire cover member is attached to the inner surface electrode which is the embodiment of the present invention and the inner surface electrode wire cover member is melted. 従来の内面電極の斜視図である。It is a perspective view of the conventional inner surface electrode. 従来の内面電極を管状物品に挿入した状態の断面図である。It is sectional drawing of the state which inserted the conventional inner surface electrode into the tubular article. 従来の内面電極線が溶解した状態の部分断面図である。It is a fragmentary sectional view of the state where the conventional inner surface electrode wire was melted.

本発明の実施の形態について、管状物品である自動車用のフィラーパイプ２０の内面に亜鉛めっきをする場合を例に取り、そのめっきに使用する内面電極１０とめっき方法について、図１〜図５に基づき説明する。
なお、本発明の内面電極１０は、フィラーパイプ２０以外にも、管状物品の内面にめっきをする場合に広く使用することができる。また、亜鉛めっき以外の他のめっきにも使用することができる。 1 to 5 for the embodiment of the present invention, taking an example of galvanizing the inner surface of an automobile filler pipe 20 which is a tubular article, and the inner electrode 10 and plating method used for the plating. It will be explained based on.
In addition to the filler pipe 20, the inner surface electrode 10 of the present invention can be widely used for plating the inner surface of a tubular article. It can also be used for plating other than zinc plating.

まず、内面電極１０について、図３〜図５に基づき説明する。
図３に示すように、内面電極１０は、後述する陽極板端部３７に接続される内面電極接続部１６と、内面電極接続部１６に接続される内面電極線１１から構成されている。内面電極線１１は、内面電極接続部１６に近接する内面電極線根元部１２と、内面電極線１１の中央部の内面電極線中央部１３と、内面電極線１１の先端部の内面電極線先端部１４と、内面電極線根元部１２に取付けられる内面電極線カバー部材１５を有する。 First, the inner surface electrode 10 will be described with reference to FIGS.
As shown in FIG. 3, the inner surface electrode 10 is composed of an inner surface electrode connecting portion 16 connected to an anode plate end portion 37 described later and an inner surface electrode wire 11 connected to the inner surface electrode connecting portion 16. The inner surface electrode wire 11 includes an inner surface electrode wire root portion 12 that is close to the inner surface electrode connection portion 16, an inner surface electrode wire central portion 13 at a central portion of the inner surface electrode wire 11, and an inner surface electrode wire tip at a tip end portion of the inner surface electrode wire 11. It has a portion 14 and an inner surface electrode wire cover member 15 attached to the inner surface electrode wire root portion 12.

内面電極線１１は、直線状のものも使用することができるが、屈曲した管状物品、例えば、フィラーパイプ２０へ挿入するため、柔軟に屈曲可能な可撓性を有することが好ましい。可撓性を有するものとして、金属製の細い多数のワイヤーを編んで形成されたものを使用することができる。 The inner surface electrode wire 11 may be a straight one, but since it is inserted into a bent tubular article, for example, the filler pipe 20, it is preferable that the inner surface electrode wire 11 has a flexibility capable of being bent flexibly. As a material having flexibility, a material formed by knitting a large number of thin metal wires can be used.

可撓性を有する内面電極線１１の場合には、管状物品が屈曲して形成されていても、内面電極線１１は屈曲に沿って柔軟に変形して、長尺の管状物品の全長に亘り挿入されることができ、管状物品の内面の全長に亘りめっきを施すことができる。 In the case of the flexible inner surface electrode wire 11, even if the tubular article is formed by bending, the inner surface electrode wire 11 is flexibly deformed along the bending and extends over the entire length of the long tubular article. It can be inserted and plated over the entire length of the inner surface of the tubular article.

なお、内面電極線１１の内面電極線中央部１３と内面電極線カバー部材１５の表面には、フィラーパイプ２０の内面と内面電極線１１が接触することを防止するため、絶縁部材で且つ、めっき液とめっき電流が流れることができる部材が取付けられている。絶縁部材として、内面電極線中央部１３と内面電極線カバー部材１５に巻き付けられる合成樹脂製のスペーサや網目部材を使用することができる。 In order to prevent the inner surface of the filler pipe 20 and the inner electrode wire 11 from coming into contact with each other, the inner surface of the inner electrode wire 11 and the surface of the inner electrode wire cover member 15 are insulating members and plated. Attached is a member through which the liquid and the plating current can flow. As the insulating member, a spacer made of synthetic resin or a mesh member wound around the inner electrode wire central portion 13 and the inner electrode wire cover member 15 can be used.

また、内面電極線１１が金属製の多数のワイヤーを編んで形成されている場合には、所定の剛性を有して、長尺状のフィラーパイプ２０等に挿入するときに、フィラーパイプ２０の形状に応じて、フィラーパイプ内面２１に沿って、他方の出口端まで押し込むことが容易である。また、めっき液２のアルカリ性にも耐久性を有することができる。また、金属製のため、導電性を有するとともに耐久性に優れている。 Moreover, when the inner surface electrode wire 11 is formed by knitting a large number of metal wires, the inner surface electrode wire 11 has a predetermined rigidity, and when the inner surface electrode wire 11 is inserted into the elongated filler pipe 20 or the like, Depending on the shape, it is easy to push along the inner surface 21 of the filler pipe to the other outlet end. Further, the plating solution 2 can also have durability against alkalinity. Further, since it is made of metal, it has conductivity and is excellent in durability.

図３に示すように、内面電極線１１は、内面電極線１１とめっき液２が接触する部分で、且つ、電流が内面電極線１１の他の部分よりも多く流れる部分の外面に導電性の内面電極線カバー部材１５を取付けている。本実施の形態では、内面電極線根元部１２に取付けられている。 As shown in FIG. 3, the inner surface electrode wire 11 is electrically conductive on the outer surface of the portion where the inner surface electrode wire 11 and the plating solution 2 are in contact with each other and the current flows more than the other portion of the inner surface electrode wire 11. An inner electrode wire cover member 15 is attached. In this embodiment, it is attached to the inner electrode wire root portion 12.

本実施の形態では、内面電極線１１の内面電極線１１とめっき液２が接触する部分で、且つ、電流が内面電極線１１の他の部分よりも多く流れる部分は、管状物品であるフィラーパイプ２０の入口部に近接した内面電極線１１の内面電極線根元部１２である。フィラーパイプ２０の入口部には、給油ガンの先端を保持するためのリテーナが取付けられていたり、タンクキャップを取付けるねじ部が形成されていたりして、入口部が狭くなり、内面電極線１１と近接しやすくなっている。 In the present embodiment, a portion of the inner surface electrode wire 11 where the inner surface electrode wire 11 and the plating solution 2 are in contact with each other, and a portion where a larger amount of current flows than the other parts of the inner surface electrode wire 11 is a filler pipe which is a tubular article. It is the inner surface electrode wire root portion 12 of the inner surface electrode wire 11 which is close to the entrance portion of 20. At the inlet of the filler pipe 20, a retainer for holding the tip of the refueling gun is attached, or a screw portion for attaching the tank cap is formed, so that the inlet becomes narrower and the inner electrode wire 11 and It is easy to approach.

このような場合には、内面電極線カバー部材１５は、電気めっき時にフィラーパイプ２０の入口部に近接するように取付けられている。このため、三次元的に屈曲したフィラーパイプ２０においても内部を確実にめっきすることができるとともに、フィラーパイプ２０の入口部にリテーナ等を取付けても、内面電極線カバー部材１５により内面電極１０の寿命を長くすることができる。 In such a case, the inner surface electrode wire cover member 15 is attached so as to be close to the inlet portion of the filler pipe 20 during electroplating. Therefore, even in the three-dimensionally bent filler pipe 20, the inside can be reliably plated, and even if a retainer or the like is attached to the inlet portion of the filler pipe 20, the inner electrode wire cover member 15 prevents the inner electrode 10 from sticking. The life can be extended.

内面電極線カバー部材１５は、円筒状に形成されて、内面電極線根元部１２にかしめることにより取付けられている。
内面電極線１１に取付けできるように、内面電極線カバー部材１５の内径は、内面電極線１１の外径よりも若干大きく形成され、内面電極線カバー部材１５は、３０〜５０ｍｍ程度の長さを有している。 The inner surface electrode wire cover member 15 is formed in a cylindrical shape, and is attached by caulking to the inner surface electrode wire root portion 12.
The inner surface electrode wire cover member 15 is formed so that the inner diameter thereof is slightly larger than the outer diameter of the inner surface electrode wire 11 so that the inner surface electrode wire cover member 15 can be attached to the inner surface electrode wire 11, and the inner surface electrode wire cover member 15 has a length of about 30 to 50 mm. Have

内面電極線カバー部材１５の肉厚は、０．５〜１．５ｍｍ程度であることが好ましい。この場合には、内面電極線カバー部材１５を内面電極線１１に、かしめ等により取付けることが容易であるとともに、内面電極線カバー部材１５がメッキ液に溶解する時間を長くすることができ、内面電極１０の寿命を長くすることができる。 The inner electrode wire cover member 15 preferably has a wall thickness of about 0.5 to 1.5 mm. In this case, the inner surface electrode wire cover member 15 can be easily attached to the inner surface electrode wire 11 by caulking or the like, and the time for the inner surface electrode wire cover member 15 to dissolve in the plating solution can be lengthened. The life of the electrode 10 can be extended.

肉厚が０．５ｍｍ未満の場合には、内面電極線カバー部材１５がメッキ液に溶解する時間が短くなり、図５に示すように、内面電極線１１が溶解してしまうこととなり、肉厚が１．５ｍｍを超える場合には、内面電極線カバー部材１５の剛性が大きくなりすぎて、内面電極線カバー部材１５を内面電極線１１にかしめにくくなる。 If the wall thickness is less than 0.5 mm, the time required for the inner surface electrode wire cover member 15 to dissolve in the plating solution becomes shorter, and as shown in FIG. When is greater than 1.5 mm, the rigidity of the inner surface electrode wire cover member 15 becomes too large, and it becomes difficult to crimp the inner surface electrode wire cover member 15 to the inner surface electrode wire 11.

内面電極線１１と内面電極線カバー部材１５は、ステンレススチール製であることが好ましい。この場合には、内面電極線１１と内面電極線カバー部材１５は、さびにくく、めっき液や他の薬品にも腐食されにくく、耐久性に優れている。 The inner surface electrode wire 11 and the inner surface electrode wire cover member 15 are preferably made of stainless steel. In this case, the inner surface electrode wire 11 and the inner surface electrode wire cover member 15 are less likely to rust, less likely to be corroded by the plating solution and other chemicals, and have excellent durability.

内面電極線１１と上記内面電極線カバー部材１５は、同じ材料を使用することが好ましい。特に、共にＪＩＳに規定する、ステンレススチール３１６（ＳＵＳ３１６）を使用することが好ましい。ステンレススチール３１６（ＳＵＳ３１６）は、特に耐腐食性に優れて、耐久性に優れている。
内面電極線１１と内面電極線カバー部材１５は、同じステンレススチール３１６（ＳＵＳ３１６）で形成されている場合には、内面電極線カバー部材１５から確実に溶解させることができる。 The inner electrode wire 11 and the inner electrode wire cover member 15 are preferably made of the same material. In particular, it is preferable to use stainless steel 316 (SUS316), both of which are specified in JIS. Stainless steel 316 (SUS316) is particularly excellent in corrosion resistance and durability.
When the inner surface electrode wire 11 and the inner surface electrode wire cover member 15 are made of the same stainless steel 316 (SUS316), the inner surface electrode wire cover member 15 can be surely melted.

次に、内面電極１０を使用した管状物品のめっきの方法について、フィラーパイプ２０の亜鉛めっきを例にとり説明する。
フィラーパイプ２０等の管状物品のめっきは、図１に示すように行われる。
めっき槽１内にめっき液２が入れられて、めっき液２内には水酸化ナトリウム及びシアン化ナトリウムと亜鉛イオンが含まれている。さらに、めっき槽１内には亜鉛板で形成される陽電極３、４が挿入され、被めっき物であるフィラーパイプ２０の内部には内面電極１０が挿入されている。
なお、フィラーパイプ２０は、めっき工程の前に、脱脂工程、洗浄工程により表面を清浄にされる。 Next, a method of plating a tubular article using the inner surface electrode 10 will be described by taking the zinc plating of the filler pipe 20 as an example.
The tubular article such as the filler pipe 20 is plated as shown in FIG.
The plating solution 2 is placed in the plating tank 1, and the plating solution 2 contains sodium hydroxide, sodium cyanide and zinc ions. Further, the positive electrodes 3 and 4 formed of a zinc plate are inserted into the plating tank 1, and the inner electrode 10 is inserted into the filler pipe 20 which is the object to be plated.
The surface of the filler pipe 20 is cleaned by a degreasing process and a cleaning process before the plating process.

陽電極３、４には、陽極リード線５が取り付けられ、内面電極１０には内面電極リード線６が取り付けられている。フィラーパイプ２０には陰極リード線７が取り付けられている。陽極リード線５と内面電極リード線６はめっき電流の供給装置である外面用電源からの陽極に、陰極リード線７は外面用電源の陰極に接続されて、外面用電源から電流が供給されてめっきが行われる。 An anode lead wire 5 is attached to the positive electrodes 3 and 4, and an inner surface electrode lead wire 6 is attached to the inner surface electrode 10. The cathode lead wire 7 is attached to the filler pipe 20. The anode lead wire 5 and the inner surface electrode lead wire 6 are connected to the anode from the outer surface power source, which is a supply device of the plating current, and the cathode lead wire 7 is connected to the cathode of the outer surface power source, and the current is supplied from the outer surface power source. Plating is performed.

このとき、フィラーパイプ２０はめっき槽１内に並んで多数浸漬されて、めっきが行われるが、めっき槽１内のフィラーパイプ２０の保持は図２に示すようにめっきハンガー３０により行われる。
フィラーパイプ２０は、めっきハンガー３０に取り付けられてめっき槽１内に浸漬される。めっきハンガー３０は、フィラーパイプ２０に電流を供給する陰極板３１と、内面電極１０に電流を供給する陽極板３５から構成され、陰極板３１と陽極板３５は中央付近で相互に絶縁されて接合されている。 At this time, a large number of filler pipes 20 are lined up in the plating tank 1 for plating to perform plating. The filler pipes 20 are held in the plating tank 1 by the plating hanger 30 as shown in FIG.
The filler pipe 20 is attached to the plating hanger 30 and immersed in the plating tank 1. The plating hanger 30 includes a cathode plate 31 that supplies a current to the filler pipe 20 and an anode plate 35 that supplies a current to the inner surface electrode 10. The cathode plate 31 and the anode plate 35 are insulated from each other near the center and joined together. Has been done.

陰極板３１の上方の先端は、断面略Ｕ字形に曲げられて陰極板係合部３２を形成している。陰極板係合部３２は、めっき槽１に設けられた陰極バー８に係合され、めっきハンガー３０とフィラーパイプ２０は、めっき槽１内に保持される。陰極バー８には外面用電源から陰極電流が供給され、めっきハンガー３０の陰極板３１と電気的に接続される。 An upper end of the cathode plate 31 is bent into a substantially U-shaped cross section to form a cathode plate engaging portion 32. The cathode plate engaging portion 32 is engaged with the cathode bar 8 provided in the plating tank 1, and the plating hanger 30 and the filler pipe 20 are held in the plating tank 1. A cathode current is supplied to the cathode bar 8 from an external power source and is electrically connected to the cathode plate 31 of the plating hanger 30.

陰極板３１の下方の先端には陰極板保持部３３が形成され、管状物品であるフィラーパイプ２０が保持される。陰極板保持部３３は、フィラーパイプ２０を保持するとともに、フィラーパイプ２０に陰極電流を供給し、フィラーパイプ２０の外周面部と内面（フィラーパイプ内面２１）を電気めっきすることができる。
フィラーパイプ２０の保持は、開口部を有するリング状に形成された陰極板保持部３３に嵌め込んで保持したり、フィラーパイプ２０の外面に形成されたブリーザーパイプ等に引っ掛けたりしてもよい。 A cathode plate holding portion 33 is formed at the lower tip of the cathode plate 31, and holds the filler pipe 20 which is a tubular article. The cathode plate holding portion 33 can hold the filler pipe 20, supply a cathode current to the filler pipe 20, and electroplate the outer peripheral surface portion and the inner surface (filler pipe inner surface 21) of the filler pipe 20.
The filler pipe 20 may be held by fitting it into a cathode plate holding portion 33 formed in a ring shape having an opening, or may be hooked on a breather pipe or the like formed on the outer surface of the filler pipe 20.

この時、フィラーパイプ２０の入口部に近接した内面電極線１１の内面電極線根元部１２には内面電極線カバー部材１５が取付けられているため、内面電極線根元部１２付近でめっき電流が多く流れても、図５に示すように、内面電極線カバー部材１５がまず溶解するため、内面電極線１１の溶解を防止することができ、内面電極１０の寿命を長くすることができる。 At this time, since the inner-surface electrode wire cover member 15 is attached to the inner-surface electrode wire root portion 12 of the inner-surface electrode wire 11 close to the inlet portion of the filler pipe 20, the plating current is large near the inner-surface electrode wire root portion 12. Even if it flows, as shown in FIG. 5, since the inner surface electrode wire cover member 15 is first melted, the inner surface electrode wire 11 can be prevented from being melted, and the life of the inner surface electrode 10 can be extended.

なお、上述のように、内面電極線１１の内面電極線中央部１３と内面電極線カバー部材１５の表面には、フィラーパイプ２０の内面と接触することを防止するため、絶縁部材が取付けられている。このため、屈曲したフィラーパイプ２０に、長尺状の内面電極線１１を挿入しても、電流が短絡することなく、めっきを行うことができる。 As described above, an insulating member is attached to the inner surface electrode wire central portion 13 of the inner surface electrode wire 11 and the surfaces of the inner surface electrode wire cover member 15 in order to prevent contact with the inner surface of the filler pipe 20. There is. Therefore, even if the elongated inner surface electrode wire 11 is inserted into the bent filler pipe 20, plating can be performed without short-circuiting the current.

陽極板３５の上方の先端は、陽極板接続部３６を形成し、陽極板接続部３６を介して内面用電源から陽極電流が供給される。陽極板３５の下方の先端は、陽極板端部３７が形成され、陽極板端部３７には、内面電極１０の内面電極線根元部１２に形成される内面電極接続部１６が内面電極止め具１８に取りつけられる。これにより、陽極板３５から陽極電流が内面電極１０に供給される。 An upper end of the anode plate 35 forms an anode plate connecting portion 36, and an anode current is supplied from an inner surface power source through the anode plate connecting portion 36. An anode plate end portion 37 is formed at the lower end of the anode plate 35, and the inner surface electrode connecting portion 16 formed at the inner surface electrode wire root portion 12 of the inner surface electrode 10 is formed on the anode plate end portion 37. Mounted on 18. As a result, an anode current is supplied from the anode plate 35 to the inner surface electrode 10.

このとき、図２に示すように、内面電極補助リード線９の根元側が陽極板端部３７に取付けられることができる。この場合には、内面電極補助リード線９の取付けは、内面電極線接続部１６の取付けと同様に、内面電極止め具１８で取付けられることができる。内面電極補助リード線９は、陽極板３５から陽極電流が供給される。 At this time, as shown in FIG. 2, the root side of the inner surface electrode auxiliary lead wire 9 can be attached to the anode plate end portion 37. In this case, the inner surface electrode auxiliary lead wire 9 can be attached by the inner surface electrode stopper 18 in the same manner as the inner surface electrode wire connecting portion 16. An anode current is supplied from the anode plate 35 to the inner surface electrode auxiliary lead wire 9.

内面電極補助リード線９の先端側は、内面電極線先端部１４に取付けられており、取付けられた内面電極１０の内面電極線１１の部分が内面電極線先端給電点１７となる。
内面電極線先端給電点１７は、内面電極線１１の内面電極線先端部１４に設けられたため、内面電極１０は、内面電極線根元部１２と内面電極線先端部１４の両側から電流を流すことができ、内面電極線１１の全長に亘り電流分布を均一化することができ、フィラーパイプ２０の内面のめっき厚分布を均一化することができる。 The tip side of the inner surface electrode auxiliary lead wire 9 is attached to the inner surface electrode wire tip portion 14, and the portion of the inner surface electrode wire 11 of the attached inner surface electrode 10 serves as the inner surface electrode wire tip feed point 17.
Since the inner-surface electrode wire tip feeding point 17 is provided at the inner-surface electrode wire tip portion 14 of the inner-surface electrode wire 11, the inner-surface electrode 10 can flow current from both sides of the inner-surface electrode wire root portion 12 and the inner-surface electrode wire tip portion 14. Therefore, the current distribution can be made uniform over the entire length of the inner surface electrode wire 11, and the plating thickness distribution on the inner surface of the filler pipe 20 can be made uniform.

１ めっき槽
２ めっき液
１０ 内面電極
１１ 内面電極線
１５ 内面電極線カバー部材
２０ フィラーパイプ（管状物品） 1 Plating Tank 2 Plating Solution 10 Inner Surface Electrode 11 Inner Surface Electrode Wire 15 Inner Surface Electrode Wire Cover Member 20 Filler Pipe (Tubular Article)

Claims (5)

管状物品に電気めっきを行うときに、該管状物品の内面に電気めっきを施すために上記管状物品の内部に挿入されて使用される管状物品の内面めっき用の内面電極において、
該内面電極は、可撓性を有し、ステンレススチール製の多数のワイヤーを編んで形成され、電源と接続する内面電極接続部と、導電体で形成される長尺状の内面電極線を有し、該内面電極線は、上記内面電極線とめっき液が接触する部分で、且つ、上記管状物品の入口部に近接した上記内面電極線の部分に、導電性のステンレススチール製の内面電極線カバー部材を取付けたことを特徴とする管状物品の内面めっき用の内面電極。 When performing electroplating on a tubular article, an inner surface electrode for inner surface plating of a tubular article used by being inserted inside the tubular article for electroplating the inner surface of the tubular article,
The inner surface electrode is flexible and is formed by weaving a number of stainless steel wires, and has an inner surface electrode connecting portion for connecting to a power source and a long inner surface electrode wire formed of a conductor. The inner surface electrode wire is a portion where the inner surface electrode wire and the plating solution come into contact with each other, and a portion of the inner surface electrode wire close to the inlet of the tubular article is a conductive inner surface electrode wire made of stainless steel. An inner surface electrode for inner surface plating of a tubular article, characterized in that a cover member is attached. 上記内面電極線と上記内面電極線カバー部材は、共にステンレススチール３１６（ＳＵＳ３１６）製である請求項１に記載の管状物品の内面めっき用の内面電極。 The inner surface electrode for inner surface plating of the tubular article according to claim 1 , wherein the inner surface electrode wire and the inner surface electrode wire cover member are both made of stainless steel 316 (SUS316). 上記内面電極線カバー部材は、肉厚が０．５〜１．５ｍｍである請求項１又は請求項２に記載の管状物品の内面めっき用の内面電極。 The inner electrode for inner surface plating of the tubular article according to claim 1 or 2 , wherein the inner electrode wire cover member has a wall thickness of 0.5 to 1.5 mm. 上記管状物品は、湾曲して形成された請求項１乃至請求項３のいずれか一項に記載の管状物品の内面めっき用の内面電極。 The inner surface electrode for inner surface plating of the tubular article according to any one of claims 1 to 3 , wherein the tubular article is formed in a curved shape. 上記管状物品は、自動車の燃料タンクに燃料を供給するフィラーパイプであり、上記内面電極線カバー部材は、電気めっき時に上記フィラーパイプの入口部に近接するように取付けられる請求項１乃至請求項４のいずれか一項に記載の管状物品の内面めっき用の内面電極。 The tubular article is a filler pipe for supplying fuel to the fuel tank of a motor vehicle, the inner surface electrode line cover member claims 1 during electroplating that is mounted so as to be adjacent to the inlet portion of the filler pipe An inner surface electrode for inner surface plating of the tubular article according to claim 4 .
JP2016105995A 2016-05-27 2016-05-27 Inner surface electrode for inner surface plating of tubular article Active JP6697210B2 (en)

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