JPH0674930A - Defect detecting method for can cover inside coating film and device therefor - Google Patents
Defect detecting method for can cover inside coating film and device thereforInfo
- Publication number
- JPH0674930A JPH0674930A JP25063192A JP25063192A JPH0674930A JP H0674930 A JPH0674930 A JP H0674930A JP 25063192 A JP25063192 A JP 25063192A JP 25063192 A JP25063192 A JP 25063192A JP H0674930 A JPH0674930 A JP H0674930A
- Authority
- JP
- Japan
- Prior art keywords
- lid
- coating film
- electrode
- electrolytic solution
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、缶蓋用金属素板の少な
くとも片面に保護塗膜が施され、塗膜面側を内面にして
形成したパーシャルオープンエンド、フルオープンエン
ド、ステイオンタブエンド等のイージーオープン缶蓋
（ＥＯＥ）や、サニタリー缶蓋の内面塗膜の欠陥個所を
自動的に検出する方法と装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a partial open end, a full open end, and a Stein tab end formed by forming a protective coating film on at least one surface of a metal plate for a can lid, with the coating film surface side being the inner surface. The present invention relates to a method and apparatus for automatically detecting a defective portion of an inner coating film of an easy open can lid (EOE) or a sanitary can lid.
【０００２】[0002]
【従来の技術】缶蓋は、缶蓋用金属素板の少なくとも片
面に保護塗膜が施され、缶胴に固着した際に、塗膜面側
が内面側（以下缶蓋内面という）となるように成形され
ている。この缶蓋内面の塗膜の欠陥個所の発見や評価を
行うために、一般的にエナメルレータ試験が知られてい
る。この試験方法は、缶蓋外面に接触可能な一方の電極
を設置し、缶蓋内面を絶縁材で作られた円筒状の測定用
治具で覆って容器状にし、この容器内に電解液を入れ、
電極棒を容器の中央部に位置させ、この状態で両電極間
に電圧をかけ、電極と缶蓋内面との間にある電解液を通
して流れる電流値を読取り記録する。そして、試験装置
の極性を反転させ、塗膜面から水素ガスが発生したとき
は、その発生個所が金属の露出部として確認できるとい
うものである。2. Description of the Related Art A can lid has a protective coating film on at least one surface of a metal plate for a can lid so that the coating surface side becomes the inner surface side (hereinafter referred to as the inner surface of the can lid) when it is fixed to a can body. Is molded into. An enamel test is generally known in order to detect and evaluate a defective portion of the coating film on the inner surface of the can lid. In this test method, one electrode that can contact the outer surface of the can lid is installed, and the inner surface of the can lid is covered with a cylindrical measuring jig made of an insulating material to form a container. Get in,
The electrode rod is positioned at the center of the container, and a voltage is applied between both electrodes in this state, and the value of the current flowing through the electrolytic solution between the electrode and the inner surface of the can lid is read and recorded. Then, when the polarity of the test device is reversed and hydrogen gas is generated from the coating film surface, the generation location can be confirmed as an exposed portion of the metal.
【０００３】しかし、前記の試験方法では、欠陥個所が
正確に判別できないため、測定値が高い場合には、この
試験方法とは別にアセトン硫酸銅溶液浸漬試験が行われ
る。この試験方法は、缶蓋をアセトン硫酸銅溶液に浸漬
して３０秒ないし２分程度放置した後、水洗と水切りを
行い、金属露出部分に銅が析出するので、拡大鏡でこれ
を調査し、グレード見本と目視により比較して良否を判
別するものである。このように、従来の試験方法は、面
倒な作業で時間が掛かり、作業効率が悪い上、人間の判
別能力に限界があることから、検査の自動化が望まれて
いた。However, in the above-mentioned test method, since the defective portion cannot be accurately discriminated, when the measured value is high, an acetone copper sulfate solution immersion test is conducted separately from this test method. In this test method, the can lid is immersed in an acetone copper sulfate solution and left for about 30 seconds to 2 minutes, then washed with water and drained, and copper is deposited on the exposed metal portion, so this is examined with a magnifying glass. The quality is judged by visually comparing with the grade sample. As described above, in the conventional test method, the labor is time-consuming, the work efficiency is poor, and the human discriminating ability is limited. Therefore, automation of the inspection has been desired.
【０００４】特開昭６３−４４１５８号公報には、金属
露出の程度を微小区分毎に検出し、欠陥の程度を正確に
検出できるようにした、金属容器の樹脂被覆部における
金属露出測定法が提案されている。この方法は、缶蓋を
内面が上向きになるように所定の位置にセットし、接触
用電極を缶蓋の外周端縁に接触させる。一方、先端に電
解液保持部材を持つ測定電極の保持部材を缶蓋の塗膜面
に押付けて接触させる。この状態で缶蓋と測定用電極と
を相対的に移動させ、一定ピッチ毎に区分して金属露出
部を検出できるようにしたものである。Japanese Unexamined Patent Publication No. 63-44158 discloses a metal exposure measuring method in a resin-coated portion of a metal container, which is capable of detecting the degree of metal exposure for each minute section and accurately detecting the degree of defects. Proposed. In this method, the can lid is set at a predetermined position so that the inner surface faces upward, and the contact electrode is brought into contact with the outer peripheral edge of the can lid. On the other hand, the holding member of the measuring electrode having the electrolyte holding member at its tip is pressed against the coating surface of the can lid and brought into contact therewith. In this state, the can lid and the measurement electrode are moved relatively to each other so that the metal exposed portion can be detected by dividing the can lid at regular intervals.
【０００５】[0005]
【発明が解決しようとする課題】前記公開公報に記載さ
れた測定法は、目視により塗膜面の欠陥位置を発見する
従来のエナメルレータ試験の欠点については一応解消さ
れるが、迅速な測定が望まれる大量生産ラインでは、解
決しなければならない問題が残されている。すなわち、
この測定法は、上向きにした塗膜面に電解液保持部材を
圧接触させる構成であるため、缶蓋の表面形状に沿って
測定電極を速く移動させると、カウンターシンクやビー
ド成形等の凹凸のある塗膜面上に電解液が残ったり、濡
れ不足が起り易くなるので、正確な検査を行うには、電
解液保持部材の接触圧の変化も考慮して極めて慎重に電
解液をコントロールする必要がある。このため、測定電
極を速く移動させるのが困難となり、缶蓋全域に亘り検
査する場合には、多くの時間が掛かる。本発明は、上記
の問題の解決を図るもので、難しい電解液のコントロー
ルを不要とし、塗膜の欠陥とその欠陥位置を迅速、かつ
正確に測定可能とすることを目的とするものである。Although the measuring method described in the above-mentioned publication solves the drawback of the conventional enamelator test in which the defective position of the coating film surface is visually detected, the rapid measuring method can be used. The desired mass production lines still have problems to be solved. That is,
Since this measurement method is configured such that the electrolytic solution holding member is brought into pressure contact with the coating film surface facing upward, when the measurement electrode is moved quickly along the surface shape of the can lid, unevenness such as counter sink or bead molding is generated. Electrolyte solution is likely to remain on the surface of a coating film and insufficient wetting easily occurs, so it is necessary to control electrolyte solution very carefully in consideration of changes in contact pressure of the electrolyte solution holding member in order to perform accurate inspection. There is. Therefore, it becomes difficult to move the measuring electrode quickly, and it takes a lot of time to inspect the entire can lid. The present invention is intended to solve the above-mentioned problems, and an object thereof is to eliminate the need for difficult control of an electrolytic solution and to quickly and accurately measure a defect in a coating film and the position of the defect.
【０００６】[0006]
【課題を解決するための手段】本発明は、缶蓋用金属素
板の少なくとも片面に保護塗膜が施され、塗膜面側を内
面にして成形した缶蓋の塗膜面の欠陥を検出する方法に
おいて、缶蓋外面と接触する接触電極で缶蓋をその塗膜
面を下向きにして保持し、該塗膜面と所定間隔を保つ電
極ノズルから該塗膜面に電解液を噴出して付着させ、該
電極ノズルと前記接触電極間に電圧を印加し、缶蓋をそ
の中心軸の周りに自転させながら、前記電極ノズルを缶
蓋の半径方向外方から缶蓋中心に向かい相対移動させ、
電解液中に流れる電流値を所定ピッチ毎に検出して缶蓋
内面の塗膜欠陥を検出するものである。この方法を行う
装置は、缶蓋外面の環状周壁部と係合するチャックと缶
蓋外周面に接触する接触電極とで缶蓋を保持すると共に
缶蓋中心軸の周りに回転可能とした缶蓋クランプ機構
と、該缶蓋クランプ機構を上下及び左右方向に移動させ
る搬送手段と、缶蓋内面に向かって電解液を噴出して付
着させる電極ノズルと、該電極ノズルと前記接触電極間
に電圧を印加する手段と、電解液中を流れる漏洩電流値
を検出する手段と、設定ピッチ毎に漏洩電流値を計測す
る制御処理部とを備えたものとする。According to the present invention, a protective coating is applied to at least one surface of a metal plate for a can lid, and defects on the coating surface of a can lid formed with the coating surface side as an inner surface are detected. In the method described above, the can lid is held with the contact electrode in contact with the outer surface of the can lid with its coating surface facing downward, and an electrolytic solution is jetted onto the coating surface from an electrode nozzle that maintains a predetermined distance from the coating surface. A voltage is applied between the electrode nozzle and the contact electrode to rotate the can lid around its central axis, while moving the electrode nozzle relative to the can lid center from the outside in the radial direction of the can lid. ,
The coating film defect on the inner surface of the can lid is detected by detecting the current value flowing in the electrolytic solution at every predetermined pitch. An apparatus for performing this method is a can lid that holds the can lid with a chuck that engages with an annular peripheral wall portion on the outer surface of the can lid and a contact electrode that contacts the outer peripheral surface of the can lid, and that is rotatable about a central axis of the can lid. A clamp mechanism, a conveyance means for moving the can lid clamp mechanism in the vertical and horizontal directions, an electrode nozzle for ejecting and attaching an electrolytic solution toward the inner surface of the can lid, and a voltage between the electrode nozzle and the contact electrode. It is provided with a means for applying, a means for detecting a leakage current value flowing in the electrolytic solution, and a control processing section for measuring the leakage current value for each set pitch.
【０００７】[0007]
【作用】回転可能なクランプ機構で缶蓋の塗膜面側を下
向きに保持して接触電極を缶蓋外面に接触させ、電極ノ
ズルと缶蓋周縁部の塗膜面とを接近させて電極ノズルか
ら電解液を塗膜面に噴出して付着させる。この状態で缶
蓋をその中心の周りに自転させながら、電極ノズルが缶
蓋の中心に向かうように相対移動させる。接触電極と電
極ノズル間に電圧を印加し、所定ピッチ毎に電解液中を
流れる漏洩電流値を測定して缶蓋内面の塗膜欠陥を検出
する。また、缶蓋内面の欠陥検出を行う前に、クランプ
機構が缶蓋を保持した状態において、缶蓋のカールエッ
ジ部又は接触電極と電極ノズルとを対向させ、電極ノズ
ルから噴出させた電解液を金属部分に接触させ、電解液
中に流れる電流を測定することで導通試験が行える。[Function] The coating surface side of the can lid is held downward by the rotatable clamp mechanism so that the contact electrode is brought into contact with the outer surface of the can lid, and the electrode nozzle and the coating surface of the peripheral portion of the can lid are brought close to each other. The electrolytic solution is sprayed onto the surface of the coating to adhere it. In this state, while rotating the can lid around its center, the electrode nozzle is relatively moved toward the center of the can lid. A voltage is applied between the contact electrode and the electrode nozzle, and the leakage current value flowing in the electrolytic solution is measured at a predetermined pitch to detect a coating film defect on the inner surface of the can lid. In addition, before detecting a defect on the inner surface of the can lid, the curl edge portion of the can lid or the contact electrode and the electrode nozzle are opposed to each other with the clamp mechanism holding the can lid, and the electrolytic solution ejected from the electrode nozzle is removed. A continuity test can be performed by contacting a metal part and measuring the current flowing in the electrolytic solution.
【０００８】[0008]
【実施例】以下、図面を参照して本発明の実施例につい
て説明する。図１は缶蓋内面塗膜検出装置の正面図、図
２は図１のＶ−Ｖ線に沿う要部を断面とした側面図であ
る。図１において、符号１は缶蓋、２は缶蓋１を内面下
向きに保持する回転自在な缶蓋クランプ機構、３は缶蓋
クランプ機構２を左右方向（Ｘ軸方向）及び上下方向
（Ｚ軸方向）に移動させる搬送機構、４は缶蓋クランプ
機構２の下方に配置された測定電極部、５は測定電極部
４の左側に配置され、検査しようとする缶蓋１を載置す
る待機位置部、６は測定電極部４の右側に配置され、検
査済み缶蓋１を排出する排出部を示し、缶蓋クランプ機
構２は搬送機構３の駆動に伴い待機位置部５と測定電極
部４と排出部６の間を移動する構成となっている。図２
に示すように、缶蓋クランプ機構２は、搬送機構３のＺ
軸テーブル（後述）に固定された支持部１０に軸受１１
を介して回転自在に設けられ、Ｚ軸方向に延びる回転体
１２を備えている。この回転体１２の下端には、缶蓋１
の環状周壁部（カウンターシンク部）１ａと嵌合するチ
ャック１３が設けられ、このチャック１３の外方には、
缶蓋１を半径方向外方から挟持する一対のクランプバー
１４が設けられている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a can lid inner surface coating film detection device, and FIG. 2 is a side view in which a main part taken along line VV of FIG. 1 is taken as a cross section. In FIG. 1, reference numeral 1 is a can lid, 2 is a rotatable can lid clamp mechanism that holds the can lid 1 downward, and 3 is the can lid clamp mechanism 2 in the left-right direction (X-axis direction) and the vertical direction (Z-axis). Transporting mechanism 4 for moving in the direction), 4 is a measuring electrode portion arranged below the can lid clamp mechanism 2, 5 is arranged on the left side of the measuring electrode portion 4, and is a standby position for mounting the can lid 1 to be inspected. The reference numeral 6 designates a discharging portion arranged on the right side of the measuring electrode portion 4 for discharging the inspected can lid 1, and the can lid clamp mechanism 2 drives the transport mechanism 3 to drive the waiting position portion 5 and the measuring electrode portion 4. It is configured to move between the discharge units 6. Figure 2
As shown in FIG.
A bearing 11 is attached to a support portion 10 fixed to a shaft table (described later).
The rotating body 12 is provided so as to be rotatable via the rotating body 12 and extends in the Z-axis direction. At the lower end of the rotating body 12, the can lid 1
A chuck 13 that fits with the annular peripheral wall portion (counter sink portion) 1a of is provided, and outside the chuck 13,
A pair of clamp bars 14 for holding the can lid 1 from the outside in the radial direction is provided.
【０００９】このクランプバー１４は、チャック１３の
上方において回転体１２の外周から外側に突出する腕部
１５にピン１６で回転可能に軸支されている。クランプ
バー１４の上端１４ｂは、腕部１５の上方において回転
体１２に組込まれたエアシリンダ１７のロッドエンド１
８にピン１９で連結されている。そして、エアシリンダ
１７は、図示しない電磁弁を介して圧力空気源に接続さ
れており、クランプバー１４は、このエアシリンダ１７
のロッドエンド１８の伸縮に伴いピン１６を支点として
チャック１３に対して近接、離間することにより開閉で
きる構成となっている。また、このクランプバー１４
は、爪状の尖った先端部１４ａを有し、缶蓋１を挟持す
る際に、缶蓋１の外周カール部にこの先端部１４ａが当
接し、缶蓋１の外表面に形成されている化成被膜を剥
し、缶蓋１の金属素地部分と接触する接触電極として働
く。なお、図示していないが、このクランプバー１４と
ピン１６，１９との接触部分は絶縁されており、各クラ
ンプバー１４からのリード線は、回転体１２の上端に設
けた回転接触端子２０に延び、更に後述する電圧装置へ
配線される。The clamp bar 14 is rotatably supported by a pin 16 above the chuck 13 to an arm portion 15 protruding outward from the outer circumference of the rotating body 12. The upper end 14 b of the clamp bar 14 has a rod end 1 of an air cylinder 17 incorporated in the rotating body 12 above the arm 15.
It is connected to 8 by a pin 19. The air cylinder 17 is connected to a pressurized air source via a solenoid valve (not shown), and the clamp bar 14 is connected to the air cylinder 17
With the expansion and contraction of the rod end 18, the pin 16 is used as a fulcrum to move closer to and away from the chuck 13 so that it can be opened and closed. Also, this clamp bar 14
Has a claw-shaped pointed tip portion 14a, and when the can lid 1 is clamped, the tip portion 14a abuts the outer peripheral curl portion of the can lid 1 and is formed on the outer surface of the can lid 1. The chemical conversion film is peeled off, and it functions as a contact electrode that comes into contact with the metal base portion of the can lid 1. Although not shown, the contact portion between the clamp bar 14 and the pins 16 and 19 is insulated, and the lead wire from each clamp bar 14 is connected to the rotary contact terminal 20 provided at the upper end of the rotating body 12. It is extended and further wired to the voltage device described below.
【００１０】回転接触端子２０の直下には、プーリー２
１が固着されており、支持部１０から正面側に延びるブ
ラケット１０ａに固定されている回転用モータ２２の駆
動プーリー２３とベルト２４で連結されており、この回
転用モータ２２の駆動に伴い、缶蓋クランプ機構２に保
持された缶蓋１は、その中心軸を中心として回転する。
一方、搬送機構３は、スライド用モータ２５の駆動によ
りＸ軸テーブル２６が左右方向（Ｘ軸方向）に移動する
Ｘ軸リニアスライド２７と、スライド用モータ２８の駆
動によりＺ軸テーブル２９が上下方向に移動するＺ軸リ
ニアスライド３０から構成されており、Ｚ軸リニアスラ
イド３０はＸ軸テーブル２６に固定され、Ｘ軸リニアス
ライド２７は、垂直支持壁３１にテーブル面を正面側に
向けて固定されている。上記の回転用モータ２２及びス
ライド用モータ２５，２８は、それぞれ後述する制御処
理部の駆動制御手段により制御駆動され、これに伴い缶
蓋クランプ機構２に保持された缶蓋１は、回転しながら
左右及び上下方向に移動する。Immediately below the rotary contact terminal 20, a pulley 2 is provided.
1 is fixed, and is connected to a drive pulley 23 of a rotation motor 22 fixed to a bracket 10a extending from the support portion 10 to the front side by a belt 24. As the rotation motor 22 is driven, a can The can lid 1 held by the lid clamp mechanism 2 rotates about its central axis.
On the other hand, in the transport mechanism 3, the X-axis table 26 is moved in the left-right direction (X-axis direction) by driving the slide motor 25, and the Z-axis table 29 is moved in the vertical direction by driving the slide motor 28. The Z-axis linear slide 30 is fixed to the X-axis table 26, and the X-axis linear slide 27 is fixed to the vertical support wall 31 with the table surface facing the front side. ing. The rotation motor 22 and the slide motors 25, 28 are controlled and driven by the drive control means of the control processing unit, which will be described later, so that the can lid 1 held by the can lid clamp mechanism 2 rotates while rotating. Move left and right and up and down.
【００１１】図２において、測定電極部４は、垂直支持
壁３１から正面側に拡る水平板３２に設けた切欠き３２
ａを下方から上方に突き出る電極ノズル３３を備えてい
る。この電極ノズル３３は、水平板３２の下面に垂設さ
れている電解液用の受け皿３４に固定された樹脂製のＬ
字状ノズル本体３５と、ノズル本体３５の先端に取付け
られた銅製の電極ヘッド３６とで構成されている。電極
ノズル３３の電極ヘッド３６は、先端が先細り状となっ
ており、電解液を上向きに噴出させる噴出孔３７が形成
されている。この噴出孔３７は缶蓋クランプ機構２の移
動中心線上に設けられ、噴出する電解液は、缶蓋クラン
プ機構２がＸ軸方向に移動すると、缶蓋クランプ機構２
に保持されている缶蓋１の半径方向で塗膜面に接触して
付着する。In FIG. 2, the measuring electrode portion 4 has a notch 32 formed in a horizontal plate 32 extending from the vertical support wall 31 to the front side.
An electrode nozzle 33 is provided which projects a from below to above. The electrode nozzle 33 is made of a resin L fixed to a tray 34 for an electrolytic solution which is vertically provided on the lower surface of the horizontal plate 32.
The nozzle body 35 is composed of a V-shaped nozzle body 35 and a copper electrode head 36 attached to the tip of the nozzle body 35. The electrode head 36 of the electrode nozzle 33 has a tapered tip, and has ejection holes 37 for ejecting the electrolyte solution upward. The ejection holes 37 are provided on the moving center line of the can lid clamp mechanism 2, and the ejected electrolyte solution is ejected when the can lid clamp mechanism 2 moves in the X-axis direction.
In the radial direction of the can lid 1 held by, the film comes into contact with and adheres to the coating surface.
【００１２】電極ヘッド３６の噴出孔３７から噴出する
電解液は、電解液タンク４０、ポンプ４１、サブタンク
４２、液量調節装置４３、ノズル本体３５の導通孔３８
を介して供給され、缶蓋１からの戻りの電解液は、受け
皿３４から電解液タンク４０に回収されて再循環する。
このように電解液を常に循環させることにより、電解液
の乾燥、固化を防ぎ、噴出孔３７の目詰りを防止する。The electrolytic solution ejected from the ejection hole 37 of the electrode head 36 is contained in the electrolytic solution tank 40, the pump 41, the sub tank 42, the liquid amount adjusting device 43, and the conducting hole 38 of the nozzle body 35.
The electrolytic solution that is supplied through the can lid 1 and returned from the can lid 1 is recovered from the tray 34 to the electrolytic solution tank 40 and recirculated.
By constantly circulating the electrolytic solution in this manner, the electrolytic solution is prevented from being dried and solidified, and the ejection holes 37 are prevented from being clogged.
【００１３】図１に示すように、待機位置部５は、検査
しようとする缶蓋を吸引、保持する載置台５０を備え、
この載置台５０は、基台５４上に固定されている支持部
５１に回転可能に支持され、モータ５２により回転駆動
される。これは、缶蓋がタブ付きのイージーオープン缶
蓋の場合に、缶蓋を回転させ、近接センサー等を使った
公知の検出手段によりタブの位置を検出し、缶蓋の向き
を設定するためのものである。排出部６には、後述する
制御処理部の検査結果に基づき、検査が済んだ缶蓋を図
示しない振り分け手段により良品と不良品とに分けて排
出する排出箱５３を備えている。As shown in FIG. 1, the standby position section 5 includes a mounting table 50 for sucking and holding a can lid to be inspected,
The mounting table 50 is rotatably supported by a supporting portion 51 fixed on a base 54, and is rotationally driven by a motor 52. This is for setting the orientation of the can lid by rotating the can lid and detecting the position of the tab by a known detection means using a proximity sensor etc. when the can lid is an easy open can lid with a tab. It is a thing. The discharge unit 6 is provided with a discharge box 53 that discharges the inspected can lid into a good product and a defective product by a distribution unit (not shown) based on an inspection result of a control processing unit described later.
【００１４】図３は、本検出装置の電気的構成を示す機
能ブロック図である。７０は電圧装置で、その一端に缶
蓋クランプ機構２の回転接触端子２０から２本延びてい
るリード線のうちの１本が電流検出器７１を介して接続
され、他端に回転接触端子２０から延びるもう１本のリ
ード線と、電極ヘッド３６から延びるリード線が切替ス
イッチ７２を介して接続されている。７３は、電流検出
器７１で検出された電流値をデジタル信号に変えてアン
ド回路７４に出力するＡ／Ｄ変換器を示す。FIG. 3 is a functional block diagram showing the electrical construction of the present detection apparatus. Reference numeral 70 denotes a voltage device, one end of which is connected to one of the lead wires extending from the rotary contact terminal 20 of the can lid clamp mechanism 2 through a current detector 71, and the other end of which is connected to the rotary contact terminal 20. The other lead wire extending from the electrode head 36 and the lead wire extending from the electrode head 36 are connected via a changeover switch 72. Reference numeral 73 denotes an A / D converter that converts the current value detected by the current detector 71 into a digital signal and outputs the digital signal to the AND circuit 74.
【００１５】導通試験手段６０は、切替スイッチ７２を
切替えることにより構成される導通回路Ｉ1（一対のク
ランプバー１４，１４間）と導通回路Ｉ2（クランプバ
ー１４，電極ヘッド３６間）を流れる電流の有無を電流
検出器７１で検出して、導通不良（缶蓋の保持ミス、接
触電極の接触不良、リード線の断線、電解液の噴出不良
等）がないかどうかを自己診断するもので、正常である
と判断されれば、駆動制御手段６１に計測開始信号を送
り、電流が流れず導通不良と判断されれば、出力手段６
２介して警報信号が出力される。The continuity test means 60 detects the current flowing through the continuity circuit I1 (between the pair of clamp bars 14 and 14) and the continuity circuit I2 (between the clamp bar 14 and the electrode head 36) constituted by switching the changeover switch 72. The presence / absence is detected by the current detector 71, and self-diagnosis is performed to determine whether there is a conduction failure (misholding can lid, contact electrode contact failure, lead wire disconnection, electrolyte ejection failure, etc.). If it is determined that the measurement start signal is sent to the drive control means 61 and no current flows and it is determined that there is a conduction failure, the output means 6
An alarm signal is output via 2.
【００１６】計測領域設定手段６３は、図示しない端末
機から入力された蓋種データ６４（例えば、ＥＯＥ、サ
ニタリ缶蓋の別、缶蓋の断面形状、スコア線の有無とス
コア線により囲まれる輪郭形状、リベットの有無及び許
容電流値等の情報等）に基づき、缶蓋内面の測定領域及
び各計測位置の座標を決定し、座標データを駆動制御手
段６１に送る。駆動制御手段６１は座標データに基づき
缶蓋クランプ機構２を制御移動させる。The measurement area setting means 63 includes lid type data 64 (for example, EOE, sanitary can lid distinction, can lid cross-sectional shape, presence / absence of score line, and contour enclosed by score line) input from a terminal device (not shown). Based on the shape, the presence or absence of rivets, information such as the allowable current value, etc.), the coordinates of the measurement area on the inner surface of the can lid and each measurement position are determined, and the coordinate data is sent to the drive control means 61. The drive control means 61 controls and moves the can lid clamp mechanism 2 based on the coordinate data.
【００１７】メモリ手段６５はアンド回路７４を介して
出力されてくる電流値の出力信号と、各モータ２２，２
５，２８のエンコーダ７６，７７，７８からの変位位置
の出力信号とから、計測領域設定手段６３により設定さ
れた座標毎に電流値とその計測位置を計測データとして
記憶する。演算手段６６は、計測終了時に計測した電流
値をメモリ手段６５から読出して計測領域設定手段６３
で設定される各計測領域別に最大電流値を演算し、出力
手段６２を介して外部出力すると共に、計測ピッチ毎の
各電流値を良否判別手段６７でそれぞれ許容電流値と比
較して良否を判別し、不良と判定された場合は、メモリ
手段６５からその計測位置（塗膜不良個所）を読出し、
出力手段６２を介してプリンター、ＣＲＴ等に出力す
る。上記した導通試験手段６０、駆動制御手段６１、出
力手段６２、計測領域設定手段６３、メモリ手段６５、
演算手段６６及び良否判別手段６７で構成される制御処
理部７５は、パーソナルコンピュータを用いることがで
きる。The memory means 65 outputs the output signal of the current value output through the AND circuit 74 and the motors 22 and 2 respectively.
Based on the displacement position output signals from the encoders 76, 77, 78 of 5, 28, the current value and its measurement position are stored as measurement data for each coordinate set by the measurement area setting means 63. The calculation means 66 reads out the current value measured at the end of the measurement from the memory means 65 and sets the measurement area setting means 63.
The maximum current value is calculated for each measurement area set by, and is output to the outside through the output means 62, and the current value for each measurement pitch is compared with the allowable current value by the quality determination means 67 to determine the quality. If it is determined to be defective, the measurement position (coating film defective portion) is read from the memory means 65,
Output to a printer, CRT, etc. via the output means 62. Continuity test means 60, drive control means 61, output means 62, measurement area setting means 63, memory means 65,
A personal computer can be used as the control processing unit 75 including the calculation unit 66 and the quality determination unit 67.
【００１８】図４は缶蓋の裏面と一部断面を示す。Ｐは
パネル領域、Ｃはカウンターシンク領域で、カウンター
シンク領域Ｃの外側のカール部には密封用ゴムＧが取付
けられている。このような形状の缶蓋の場合には、計測
領域設定手段６３では、少なくともカウンターシンク領
域Ｃとパネル領域Ｐに分けて領域を設定する。図５はタ
ブ付きのイージーオープン缶蓋の裏面と一部断面を示
し、Ｓはスコア領域、Ｒはリベット領域である。この缶
蓋の場合には、計測領域設定手段６３では、カウンター
シンク領域Ｃ、パネル領域Ｐに加え、スコア領域（スコ
ア線により囲まれる輪郭形状の内側領域）Ｓとリベット
領域Ｒが設定可能な構成となっている。また、各計測位
置は、回転用モータ２２のエンコーダ７６の変位位置信
号と、Ｘ軸リニアスライド用モータ２５のエンコーダ７
７の変位位置信号とから、計測位置の説明図である図６
に示すように、缶蓋中心Ｏを定点とし、動径ｒ、偏角φ
とする極座標系でメモリ手段６５に記憶させる。FIG. 4 shows a back surface and a partial cross section of the can lid. P is a panel area, C is a countersink area, and a sealing rubber G is attached to a curl portion outside the countersink area C. In the case of a can lid having such a shape, the measurement area setting means 63 sets the area at least separately for the counter sync area C and the panel area P. FIG. 5 shows a back surface and a partial cross section of the easy-open can lid with tabs, S is a score area, and R is a rivet area. In the case of this can lid, in the measurement area setting means 63, in addition to the counter sync area C and the panel area P, a score area (inner area of the outline surrounded by score lines) S and a rivet area R can be set. Has become. Further, each measurement position includes a displacement position signal of the encoder 76 of the rotation motor 22 and an encoder 7 of the X-axis linear slide motor 25.
6 is an explanatory diagram of a measurement position from the displacement position signal of FIG.
As shown in, the center O of the can lid is set as a fixed point, and the radial radius r and declination φ
The memory means 65 stores the polar coordinate system.
【００１９】図７ないし図９は、缶蓋内面塗膜検出動作
の一例を示すフローチャートで、計測原点位置を示す図
１０、計測の初期位置を示す図１１及び計測完了位置を
示す図１２をも参照して以下説明する。缶蓋１を載置台
５０に載せ、蓋種データ６４を入力して検出装置の操作
ボタンを押すと動作が開始され、先ずステップＳ１で、
蓋種データ６４に基づき計測原点位置（Ｘ0，Ｚ0）の設
定が行われる。この設定が終わると、ステップＳ２へ進
み、載置台５０上の缶蓋１をチャック１３と一対のクラ
ンプバー１４で保持する。保持した缶蓋１を計測原点位
置（Ｘ0，Ｚ0）まで搬送するに先立ち、ステップＳ３で
一対のクランプバー１４間、すなわち導通回路Ｉ1に電
圧がかけられ、缶蓋１がチャック１３とクランプバー１
４とで正しく保持したかどうかが判断される。（クラン
プチェック）導通回路Ｉ1に電流が流れ、缶蓋１が正し
く保持されていることが確認されると、ステップＳ４に
進み、Ｘ，Ｚ軸リニアスライド２７，３０が作動する。
電流が検出されず缶蓋１が正しく保持されていない場合
には、警報装置をオンさせ、ステップＳ３のまま停止状
態となる。7 to 9 are flowcharts showing an example of the operation of detecting the coating film on the inner surface of the can lid, including FIG. 10 showing the measurement origin position, FIG. 11 showing the initial measurement position, and FIG. 12 showing the measurement completion position. A description will be given below with reference to FIG. The operation is started when the can lid 1 is placed on the mounting table 50, the lid type data 64 is input, and the operation button of the detection device is pressed. First, in step S1,
The measurement origin position (X0, Z0) is set based on the lid type data 64. When this setting is completed, the process proceeds to step S2, and the can lid 1 on the mounting table 50 is held by the chuck 13 and the pair of clamp bars 14. Prior to transporting the held can lid 1 to the measurement origin position (X0, Z0), a voltage is applied between the pair of clamp bars 14, that is, the conduction circuit I1 in step S3, so that the can lid 1 holds the chuck 13 and the clamp bar 1.
It is judged with 4 and whether or not it is correctly held. (Clamp check) When a current flows in the conduction circuit I1 and it is confirmed that the can lid 1 is correctly held, the process proceeds to step S4, and the X and Z axis linear slides 27 and 30 are operated.
If the current is not detected and the can lid 1 is not properly held, the alarm device is turned on and the stopped state is kept at step S3.
【００２０】ステップＳ４で、缶蓋１を計測原点位置
（Ｘ0，Ｚ0）へ搬送させる。この計測原点位置（Ｘ0，
Ｚ0）とは、図１０に示すように、未塗装で金属が露出
している缶蓋１のカールエッジ部が、電極ヘッド３６か
ら噴出する電解液Ｄに接触する位置である。次に、ステ
ップＳ５で、切替スイッチ７２が切り替わり、導通通路
がＩ1からＩ2に切り替わり、導通通路Ｉ2に電圧がかけ
られ、導通試験が行われる。電解液Ｄを通して電流が流
れ、検出装置自体が正常であることが確認されると、計
測開始信号が駆動制御手段６１に送られて計測状態とな
り、ステップＳ６に移る。そうでない場合は、警報装置
をオンさせ、ステップＳ５のまま停止状態となる。In step S4, the can lid 1 is conveyed to the measurement origin position (X0, Z0). This measurement origin position (X0,
As shown in FIG. 10, Z0) is the position where the curl edge portion of the can lid 1 which is unpainted and whose metal is exposed contacts the electrolytic solution D ejected from the electrode head 36. Next, in step S5, the changeover switch 72 is switched, the conduction path is changed from I1 to I2, a voltage is applied to the conduction path I2, and a conduction test is performed. When a current flows through the electrolytic solution D and it is confirmed that the detection device itself is normal, a measurement start signal is sent to the drive control means 61 to enter the measurement state, and the process proceeds to step S6. If not, the alarm device is turned on and remains in the stopped state at step S5.
【００２１】ステップＳ６では、蓋種データ６４に基づ
き計測領域の初期位置（ｎ＝１）の準備が行われ、計測
が開始されるとステップＳ７に進む。ステップＳ７で
は、駆動制御手段６１に初期位置の座標（Ｘ1，Ｚ1）が
セットされ、そのセットに伴いＸ，Ｚ軸リニアスライド
２７，３０を駆動させ、缶蓋を図１１に示す計測初期位
置（ｎ＝１）に移動させる。この位置では、缶蓋１の環
状周壁部１ａの内面に電解液Ｄが接触する。続いてステ
ップＳ８に移り、回転用モータ２２を駆動させて缶蓋１
をその中心Ｏの周りに自転させる。次に、ステップＳ９
で、計測領域設定手段６３により設定された座標毎にア
ンド回路７４から入力されてくる漏洩電流値Ｉφと、そ
の計測位置（ｒ，φ）をメモリ手段６５に記憶する。ス
テップＳ１０で、缶蓋が１回転したかどうかが判断さ
れ、１回転しない場合には、ステップＳ９を繰り返し実
行する。In step S6, the initial position (n = 1) of the measurement region is prepared based on the lid type data 64, and when the measurement is started, the process proceeds to step S7. In step S7, the coordinates (X1, Z1) of the initial position are set in the drive control means 61, the X, Z axis linear slides 27, 30 are driven in accordance with the setting, and the can lid is moved to the measurement initial position (shown in FIG. 11). Move to n = 1). At this position, the electrolytic solution D contacts the inner surface of the annular peripheral wall portion 1a of the can lid 1. Then, the process proceeds to step S8, the rotation motor 22 is driven to drive the can lid 1
Rotate around its center O. Next, step S9
Then, the leakage current value Iφ input from the AND circuit 74 and the measurement position (r, φ) for each coordinate set by the measurement area setting means 63 and the measured position (r, φ) are stored in the memory means 65. In step S10, it is determined whether or not the can lid has rotated once, and if it has not rotated once, step S9 is repeatedly executed.
【００２２】１回転したことを確認すると、ステップＳ
１１に進み、次の座標位置（ｎ＝２）が駆動制御手段６
１にセットされてステップＳ７に戻り、Ｘ，Ｚ軸リニア
スライドを駆動させて缶蓋の計測位置を１ステップ半径
方向中心側へ移行させる。このようにステップＳ１１で
は、図１２に示す計測完了位置、すなわち、電極ヘッド
３６が缶蓋１の中心Ｏの位置に移動し終わるまで、ステ
ップＳ７からステップＳ１１が繰り返し実行され、同心
円状に電流値計測が行われる。座標が計測完了座標（動
径ｒ＝０）となると、缶蓋の内面全域に亘り塗膜面の電
流値計測が終了したことになり、ステップＳ１２に進
み、回転用モータ２２を停止して缶蓋クランプ機構２を
停止させる。When it is confirmed that one revolution has been made, step S
11, the next coordinate position (n = 2) is the drive control means 6
After being set to 1, the process returns to step S7, and the X and Z axis linear slides are driven to shift the measuring position of the can lid to the center side in the radial direction by one step. Thus, in step S11, steps S7 to S11 are repeatedly executed until the measurement completion position shown in FIG. 12, that is, the electrode head 36 has moved to the position of the center O of the can lid 1, and the current values are concentrically formed. Measurement is performed. When the coordinates are the measurement completion coordinates (radius r = 0), it means that the measurement of the current value of the coating film surface is completed over the entire inner surface of the can lid, and the process proceeds to step S12 to stop the rotation motor 22 and stop the can. The lid clamp mechanism 2 is stopped.
【００２３】ステップＳ１３では、各計測領域別に電流
値Ｉφが集計され、最大電流値ＩMAX が出力手段６２を
介して領域別に外部出力される。また、ステップＳ１４
では、各電流値Ｉφが許容電流値Ｉａと比較され、全て
Ｉφ≦Ｉａであれば、排出部６で良品箱に排出され、１
個所でもＩφ＞Ｉａのものがあれば、その計測位置
（ｒ，φ）を読出して、その位置を塗膜欠陥個所として
出力手段６２を介して外部出力すると共に、警報装置を
オンして排出部６で不良品箱に排出し、待機状態とな
る。In step S13, the current value Iφ is calculated for each measurement area, and the maximum current value IMAX is externally output for each area via the output means 62. In addition, step S14
Then, each current value Iφ is compared with the permissible current value Ia, and if all Iφ ≦ Ia, they are discharged to the non-defective box by the discharging unit 6, and 1
If there is a position where Iφ> Ia, the measured position (r, φ) is read out, and the position is externally output as the coating film defect position via the output means 62, and the alarm device is turned on to discharge the part. At 6, the product is discharged into a defective product box and is in a standby state.
【００２４】上記実施例では、缶蓋内面を半径方向外方
から中心に向かう同心円状のパターンで塗膜面の漏洩電
流値を計測しているが、缶蓋の計測位置を半径方向外方
から中心に向かって移動させ、前に噴出させた電解液が
塗膜面に付着したまま残った場合でも、電解液の自重と
缶蓋の回転に伴う遠心力で電解液を下方に落下又は外側
に移動させ、新しく噴出した計測位置の電解液と接触し
ないようにして正確に塗膜欠陥とその欠陥位置の検出が
行えるものであれば、計測パターンはこれに限らず、例
えば、半径方向外方から中心に向かう螺旋状のパターン
で計測するようにしても良い。In the above embodiment, the leak current value of the coating surface is measured in a concentric pattern from the outer side in the radial direction to the center on the inner surface of the can lid. Even if the electrolytic solution that was ejected before was moved toward the center and remained attached to the surface of the coating film, the electrolytic solution dropped downward or outward due to the gravity of the electrolytic solution and the centrifugal force caused by the rotation of the can lid. The measurement pattern is not limited to this as long as it is possible to accurately detect the coating film defect and the defect position by moving it and preventing it from coming into contact with the newly ejected measurement position electrolyte solution. The measurement may be performed in a spiral pattern that goes toward the center.
【００２５】また、上記実施例では、電極ノズルと缶蓋
との相対移動速度を一定に保ち、塗膜面残った電解液と
接触しないように、缶蓋中心に向かって移動する毎に、
円周状の計測点数が少なくて済むことから、回転用モー
タの回転速度を速くさせているが、その相対移動速度
は、１００ｍｍ／ｓｅｃ以上の速度に選択するのが好ま
しい。なお、計測ピッチは、電極ヘッド３６の噴出孔３
７の大きさに比例して大きくなる電解液の塗膜面への付
着面積により適宜決定されるが、塗膜面全域を計測でき
るように、Ｘ軸方向、周方向とも、噴出孔３７の大きさ
にほぼ対応した１．５〜４ｍｍの範囲で選択することが
好ましい。Further, in the above-described embodiment, the relative moving speed between the electrode nozzle and the can lid is kept constant, and each time it moves toward the center of the can lid so as not to come into contact with the electrolytic solution remaining on the coating film surface,
Since the number of circumferential measurement points is small, the rotation speed of the rotation motor is increased, but the relative movement speed is preferably selected to be 100 mm / sec or more. The measurement pitch is the ejection hole 3 of the electrode head 36.
The size of the ejection holes 37 is determined in both the X-axis direction and the circumferential direction so that the entire area of the coating film surface can be measured. It is preferable to select in the range of 1.5 to 4 mm, which almost corresponds to the above.
【００２６】また、上記実施例では、電解液の流量の変
動抑制策として、電解液タンク４０から電極ノズル３３
より高所に設けたサブタンク４２に電解液を一旦汲み上
げ、液面レベルを一定に調節したサブタンクから電解液
を液量調節装置４３を介して自重で落下させて電極ノズ
ル３３に供給するようにしてあるが、これは、脈動を起
し易いポンプを使用しても、電介液の噴出高さ（７ｍｍ
程度）を安定させ、塗膜面にほぼ一定の面積で電解液を
接触させるためで、電解液の噴出高さを安定させること
ができれば、サブタンクを必要としない。更に、上記実
施例では、固定した電極ノズルに対して缶蓋を自転させ
ながらＸ，Ｚ軸方向に移動させるようにしているが、缶
蓋を自転させるだけにし、電極ノズルをＸ，Ｚ軸方向に
移動させるようにしても良い。Further, in the above-described embodiment, as a measure for suppressing the fluctuation of the flow rate of the electrolytic solution, the electrolytic solution tank 40 to the electrode nozzle 33 are used.
The electrolytic solution is once pumped up to a sub tank 42 installed at a higher place, and the electrolytic solution is dropped from the sub tank whose liquid surface level is adjusted to a constant level through the liquid amount adjusting device 43 and supplied to the electrode nozzle 33. However, this is because even if a pump that easily causes pulsation is used, the ejection height of the electro-conducting liquid (7 mm
The degree of stability is maintained and the electrolytic solution is brought into contact with the coating film surface in a substantially constant area. Therefore, if the ejection height of the electrolytic solution can be stabilized, the sub tank is not required. Further, in the above embodiment, the can lid is moved in the X and Z axis directions while rotating the can lid with respect to the fixed electrode nozzle, but the can lid is only rotated and the electrode nozzle is moved in the X and Z axis directions. It may be moved to.
【００２７】上記実施例の効果は、次のとおりである。 イ、電解液を噴出させ、塗膜面と電極ヘッドをその電解
液を介して間接的に導通回路を構成でき、凹凸のある塗
膜面でも確実に電解液を接触させられるので、難しい電
解液のコントロールが不要となる。また、缶蓋と電極ヘ
ッドとの相対移動を伴う接触抵抗がなくなり、しかも缶
蓋を連続的に回転させながら検査できるので、迅速に塗
膜面の検出が可能となる。 ロ、塗膜面を下向きに保持した缶蓋を自転させ、缶蓋中
心に向かって同心円状又は螺旋状に塗膜欠陥を検出する
ようにしたことにより、前に付着した電解液をその自重
と蓋の回転に伴う遠心力で下方へ落下又は半径方向外方
へ移動させることができ、電解液の液引きによる影響
（前に噴出した電解液と、計測位置で噴出した電解液と
が接触し、欠陥検出位置が不正確となる）を防ぐので、
正確な検出が行える。 ハ、人手による反応位置の検出作業や、テスト蓋（傷付
き蓋）を用いた定期的な導通試験作業が不要となるのは
勿論、缶蓋１枚毎に検査装置が正常かどうかをチェック
した後自動検査を行うようにした自己診断機構を備えて
いるので、検査の信頼性が大幅に向上する。 ニ、缶蓋の塗膜面を少なくともカウンターシンク部とパ
ネル部とに計測領域を区分し、各計測領域別に電流値が
表示され、塗膜欠陥個所の全ての位置を検出及び表示で
きるので、塗膜欠陥個所を迅速に発見することができ
る。The effects of the above embodiment are as follows. B. The electrolytic solution can be ejected, and a conductive circuit can be indirectly formed between the coating surface and the electrode head via the electrolytic solution, and the electrolytic solution can be surely contacted even on the uneven coating surface. The control of is unnecessary. Further, contact resistance accompanying relative movement between the can lid and the electrode head is eliminated, and since the can lid can be inspected while continuously rotating, the coating surface can be detected quickly. (2) By rotating the can lid that holds the coating surface downward and detecting the coating defects in a concentric or spiral shape toward the center of the can lid, the electrolytic solution that was previously attached becomes the weight of the electrolyte. It can be dropped downward or moved outward in the radial direction by the centrifugal force that accompanies the rotation of the lid, and the effect of draining the electrolytic solution (the electrolytic solution ejected at the front and the electrolytic solution ejected at the measurement position contact each other). , The defect detection position becomes inaccurate)
Accurate detection is possible. C. Needless to say, there is no need for manual detection of the reaction position and periodic continuity test work using a test lid (damaged lid), and it was checked for each can lid whether the inspection device was normal. Since it has a self-diagnosis mechanism designed to perform a post-automatic inspection, the reliability of the inspection is greatly improved. D. The coating surface of the can lid is divided into at least the counter sink part and the panel part, and the measurement area is divided.The current value is displayed for each measurement area, and all positions of coating film defects can be detected and displayed. The film defect location can be found quickly.
【００２８】[0028]
【発明の効果】本発明は、電解液を缶蓋の塗膜面に噴出
させ、その電解液を介して塗膜面と電極ヘッドとの間に
間接的に導通回路を構成したので、缶蓋と電極ヘッドと
の相対移動に伴う接触抵抗がなく、しかも凹凸のある塗
膜面でも確実に電解液を接触させられるので、難しい電
解液のコントロールが不要となる。また、缶蓋を自転さ
せ、計測位置を缶蓋中心軸に向かって移動させながら同
心円状又は螺旋状に塗膜欠陥を検出するようにしたの
で、塗膜面に付着して残った電解液の影響を受けること
なく、迅速、かつ正確な塗膜欠陥とその欠陥位置の検出
が行える。According to the present invention, the electrolytic solution is jetted onto the coating surface of the can lid, and the conductive circuit is indirectly formed between the coating surface and the electrode head through the electrolytic solution. Since there is no contact resistance associated with the relative movement between the electrode head and the electrode head, and moreover, the electrolytic solution can be brought into contact with the surface of the coating film having unevenness, it is not necessary to control the electrolytic solution which is difficult. Also, the can lid is rotated and the coating position is detected concentrically or spirally while moving the measuring position toward the center axis of the can lid. The coating film defect and its defect position can be detected quickly and accurately without being affected.
【図１】本発明の缶蓋内面塗膜検出装置の正面図。FIG. 1 is a front view of a can lid inner surface coating film detection device of the present invention.
【図２】図１のＶ−Ｖ線に沿う要部を断面とした側面
図。FIG. 2 is a side view showing a cross section of a main part along line VV of FIG.
【図３】本検出装置の電気的構成を示す機能ブロック
図。FIG. 3 is a functional block diagram showing an electrical configuration of the detection device.
【図４】缶蓋の裏面と一部断面図。FIG. 4 is a back view and a partial cross-sectional view of a can lid.
【図５】タブ付きのイージーオープン缶蓋の裏面と一部
断面図。FIG. 5 is a back view and a partial sectional view of an easy-open can lid with a tab.
【図６】計測位置の説明図。FIG. 6 is an explanatory diagram of measurement positions.
【図７】缶蓋内面塗膜検出動作の一例を示すフローチャ
ート。FIG. 7 is a flowchart showing an example of a can lid inner surface coating film detection operation.
【図８】図７に続く工程を示すフローチャート。FIG. 8 is a flowchart showing a process that follows FIG.
【図９】図８に続く工程を示すフローチャート。9 is a flowchart showing a step that follows FIG.
【図１０】計測原点位置を示す説明図。FIG. 10 is an explanatory diagram showing a measurement origin position.
【図１１】計測の初期位置を示す説明図。FIG. 11 is an explanatory diagram showing an initial position of measurement.
【図１２】計測完了位置を示す説明図。FIG. 12 is an explanatory diagram showing a measurement completion position.
１ 缶蓋 ２ 缶蓋クランプ機構 ３ 搬送機構 ４ 測定電極部 ５ 待機位置部 ６ 排出部 １０ 支持部 １２ 回転体 １３ チャック １４ クランプバー ２０ 回転接触端子 ２５ Ｘ軸スライド用
モータ ２６ Ｘ軸テーブル ２７ Ｘ軸リニアスラ
イド ２８ Ｚ軸スライド用モータ ２９ Ｚ軸テーブル ３０ Ｚ軸リニアスライド ３３ 電極ノズル ３５ ノズル本体 ３６ 電極ヘッド ３７ 噴出孔 ３８ 導通孔 ４０ 電解液タンク ４２ サブタンク1 Can Lid 2 Can Lid Clamping Mechanism 3 Conveying Mechanism 4 Measuring Electrode 5 Standby Position 6 Discharging 10 Support 12 Rotating Body 13 Chuck 14 Clamp Bar 20 Rotating Contact Terminal 25 X Axis Slide Motor 26 X Axis Table 27 X Axis Linear slide 28 Motor for Z-axis slide 29 Z-axis table 30 Z-axis linear slide 33 Electrode nozzle 35 Nozzle body 36 Electrode head 37 Jet hole 38 Conduction hole 40 Electrolyte tank 42 Sub tank
Claims (5)
塗膜が施され、塗膜面側を内面にして成形した缶蓋の塗
膜面の欠陥を検出する方法において、缶蓋外面と接触す
る接触電極で缶蓋をその塗膜面を下向きにして保持し、
該塗膜面と所定間隔を保つ電極ノズルから該塗膜面に電
解液を噴出して付着させ、該電極ノズルと前記接触電極
間に電圧を印加し、缶蓋をその中心軸の周りに自転させ
ながら、前記電極ノズルを缶蓋の半径方向外方から缶蓋
中心に向かい相対移動させ、電解液中に流れる電流値を
所定ピッチ毎に検出して缶蓋内面の塗膜欠陥を検出する
ことを特徴とする缶蓋内面塗膜の欠陥検出方法。1. A method for detecting a defect on the coating surface of a can lid formed by forming a protective coating on at least one surface of a metal plate for a can lid, the coating surface side being an inner surface, and a method for detecting defects on the outer surface of the can lid. Hold the can lid with its contact surface in contact with its coating surface facing down,
An electrolytic solution is jetted and adhered to the coating surface from an electrode nozzle that keeps a predetermined distance from the coating surface, a voltage is applied between the electrode nozzle and the contact electrode, and the can lid rotates about its central axis. While moving, the electrode nozzle is relatively moved from the outside of the can lid toward the center of the can lid, and the current value flowing in the electrolytic solution is detected at a predetermined pitch to detect a coating film defect on the inner surface of the can lid. A method for detecting defects in a coating film on the inner surface of a can lid, characterized by:
蓋を接触電極で保持した状態で、缶蓋のカールエッジ部
又は接触電極に、電極ノズルから噴出させた電解液を接
触させて導通を確認する請求項１記載の缶蓋内面塗膜の
欠陥検出方法。2. The electrolytic solution ejected from the electrode nozzle is brought into contact with the curl edge portion of the can lid or the contact electrode in a state where the can lid is held by the contact electrode before detecting defects in the coating film on the inner surface of the can lid. The method for detecting defects in a coating film on the inner surface of a can lid according to claim 1, wherein the conduction is confirmed.
クと缶蓋外周面に接触する接触電極とで缶蓋を保持する
と共に缶蓋中心軸の周りに回転可能とした缶蓋クランプ
機構と、該缶蓋クランプ機構を上下及び左右方向に移動
させる搬送手段と、缶蓋内面に向かって電解液を噴出し
て付着させる電極ノズルと、該電極ノズルと前記接触電
極間に電圧を印加する手段と、電解液中を流れる漏洩電
流値を検出する手段と、設定ピッチ毎に漏洩電流値を計
測する制御処理部とを備えることを特徴とする缶蓋内面
塗膜の欠陥検出装置。3. A can lid clamp mechanism that holds a can lid by a chuck that engages with an annular peripheral wall portion on the outer surface of the can lid and a contact electrode that contacts the outer peripheral surface of the can lid, and that is rotatable about a central axis of the can lid. A conveying means for moving the can lid clamp mechanism in the vertical and horizontal directions, an electrode nozzle for ejecting and adhering an electrolytic solution toward the inner surface of the can lid, and applying a voltage between the electrode nozzle and the contact electrode. A defect detecting device for an inner coating film on a can lid, comprising: a means, a means for detecting a leakage current value flowing in the electrolytic solution, and a control processing section for measuring the leakage current value for each set pitch.
御移動させる手段と、缶蓋塗膜面を少なくともカウンタ
ーシンク領域とパネル領域とに領域設定する計測領域設
定手段と、漏洩電流値とその計測位置を計測データとし
て記憶するメモリ手段と、該メモリ手段から計測データ
を読出して設定した領域別に漏洩電流値を集計する演算
手段と、各漏洩電流値を予め設定した許容電流値と比較
する良否判別手段とが設けられている請求項３記載の缶
蓋内面塗膜の欠陥検出装置。4. The control processing section includes means for controlling and moving the can lid clamp mechanism, measuring area setting means for setting the can lid coating surface area at least in a counter sink area and a panel area, and a leakage current value. Memory means for storing the measurement position as measurement data, calculation means for reading out the measurement data from the memory means and summing the leakage current values for each set region, and comparing each leakage current value with a preset allowable current value. The defect detecting device for the coating film on the inner surface of the can lid according to claim 3, further comprising a quality determining means.
かどうかを自己診断する導通試験手段が設けられている
請求項３又は４記載の缶蓋内面塗膜の欠陥検出装置。5. The defect detecting device for an inner coating film on a can lid according to claim 3 or 4, wherein the control processing unit is provided with a continuity test means for self-diagnosing whether or not the detecting device has an abnormality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04250631A JP3122958B2 (en) | 1992-08-26 | 1992-08-26 | Method and apparatus for detecting defects in inner coating film of can lid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04250631A JP3122958B2 (en) | 1992-08-26 | 1992-08-26 | Method and apparatus for detecting defects in inner coating film of can lid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0674930A true JPH0674930A (en) | 1994-03-18 |
| JP3122958B2 JP3122958B2 (en) | 2001-01-09 |
Family
ID=17210731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04250631A Expired - Lifetime JP3122958B2 (en) | 1992-08-26 | 1992-08-26 | Method and apparatus for detecting defects in inner coating film of can lid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3122958B2 (en) |
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|---|---|---|---|---|
| JP2011102790A (en) * | 2009-10-16 | 2011-05-26 | Jfe Steel Corp | Method for speedily evaluating corrosion resistance to contents of can molding |
| WO2012141323A1 (en) | 2011-04-12 | 2012-10-18 | Ｊｆｅスチール株式会社 | Method for evaluating corrosion resistance of molded can against content |
| CN107860811A (en) * | 2017-12-21 | 2018-03-30 | 中国包装科研测试中心 | Cover of pop can face coat integrity test device and method of testing |
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| CN112098475A (en) * | 2020-09-24 | 2020-12-18 | 广东嘉仪仪器集团有限公司 | In-can coating film detector |
| CN112114008A (en) * | 2020-09-24 | 2020-12-22 | 广东嘉仪仪器集团有限公司 | Detection column for in-tank coating detector |
| WO2023099718A1 (en) * | 2021-12-02 | 2023-06-08 | Lucien NELEN | Apparatus to enamel rate selected regions of metal objects |
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1992
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011102790A (en) * | 2009-10-16 | 2011-05-26 | Jfe Steel Corp | Method for speedily evaluating corrosion resistance to contents of can molding |
| WO2012141323A1 (en) | 2011-04-12 | 2012-10-18 | Ｊｆｅスチール株式会社 | Method for evaluating corrosion resistance of molded can against content |
| CN107860811A (en) * | 2017-12-21 | 2018-03-30 | 中国包装科研测试中心 | Cover of pop can face coat integrity test device and method of testing |
| CN110006982A (en) * | 2019-04-03 | 2019-07-12 | 广东嘉仪仪器集团有限公司 | Film integrity mensuration' instrument in multistation cover |
| CN110006982B (en) * | 2019-04-03 | 2024-03-26 | 广东嘉仪仪器集团有限公司 | Multi-station can cover inner coating film integrity tester |
| CN112098475A (en) * | 2020-09-24 | 2020-12-18 | 广东嘉仪仪器集团有限公司 | In-can coating film detector |
| CN112114008A (en) * | 2020-09-24 | 2020-12-22 | 广东嘉仪仪器集团有限公司 | Detection column for in-tank coating detector |
| WO2023099718A1 (en) * | 2021-12-02 | 2023-06-08 | Lucien NELEN | Apparatus to enamel rate selected regions of metal objects |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3122958B2 (en) | 2001-01-09 |
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