JP4235722B2

JP4235722B2 - Gloss detection device for paper sheet surface

Info

Publication number: JP4235722B2
Application number: JP17815199A
Authority: JP
Inventors: 中利典田; 坂利壽小; 山直樹上
Original assignee: Glory Ltd
Current assignee: Glory Ltd
Priority date: 1999-06-24
Filing date: 1999-06-24
Publication date: 2009-03-11
Anticipated expiration: 2019-06-24
Also published as: JP2001004541A

Description

【０００１】
【発明の属する技術分野】
本発明は、紙幣、有価証券等紙葉類の表面の光沢値を検出して紙葉類の紙質および／または印刷面の均一化を図り、異質の紙葉類を分別するに用いて好適な光沢検知装置に係り、特に手に持って任意所望箇所の光沢値を迅速に検知することができる光沢検知装置に関する。
【０００２】
【従来の技術】
例えば紙幣の場合、その紙質は予め定められた材料で所定の厚みに抄造され、均一性を有する紙が用いられるが、種々の条件により表面の光沢に変動を生じることがある。
【０００３】
また紙幣においては１枚の用紙に通常４列５行計２０枚分の紙幣模様が印刷（大判印刷）されるが、印刷用輪転機の版胴の押圧力によっては紙が過剰に加圧されて部分的および／または全紙の表面の光沢が変動する。
【０００４】
一方、従来から被測定物の表面の光沢を検知する装置として、被測定物に所定の角度をもって入射させる投光器と、この投光器から投光した光が被測定物の表面で反射した反射光を受光する受光器とを用い、その反射光の光量（反射率）を知ることにより被測定物の表面の光沢値を判断するようにしたものが用いられている。
【０００５】
【発明が解決しようとする課題】
しかして前記のように紙幣の大判印刷の場合、版胴の押圧力が過大であると表面の光沢値が異なり、これら特性値の変動による品質のばらつきは、紙幣の偽造防止の見地から好ましくないことが生じる。これは他の有価証券類についても同様である。
【０００６】
また紙幣の表面の光沢値を従来の光沢検知装置で検知しようとすると、印刷直後インキが未乾燥の状態で大判紙幣を検知しようとする場合、任意の検知箇所へ適確に光を投射させることが難しく、かつ紙面の状態に基づく光の反射状況を適確に把握することが難しかった。
【０００７】
本発明は、投光器からの光の正反射光と拡散反射光との双方を受光し、その両者の反射光量の比により被測定物の表面の光沢を検知するようにした光沢検知装置を提供することにある。
【０００８】
また光沢検知装置をハンディタイプに構成することができ、紙幣等の製紙および／または印刷過程において任意所望の箇所の紙面の光沢値を直ちに検知することができるようにしたことにある。
【０００９】
【課題を解決するための手段】
上記課題を解決する手段として本発明は、手持ち可能な装置本体と、この装置本体の下端に下搾りの尖塔状に開口された測定窓部と、前記装置本体内に設けられ該本体に対し垂直な線に対し所定の角度をもって投光するよう配設された投光器と、この投光器から投光して被測定物の表面により正反射した光を受光する正反射光受光器と、前記被測定物の表面により拡散反射した光を受光する拡散反射光受光器とを具有し、前記正反射光と拡散反射光との比により被測定物の光沢を検知するようにしたことにある。
【００１０】
前記測定窓部に透光部材を被測定物の表面に密接するように設ければ、被測定物の測定箇所の平坦性を得るうえで好ましく、検知精度を高めることができる。
前記正反射光受光器は、前記測定窓部に配設される透光部材に屈折して入射し被測定物で正反射した正反射光のみを受光し、透光部材の上面で反射した反射光を受光しない位置に配設することが好ましい。
【００１１】
前記装置本体の測定窓部の窓枠に下面が該測定窓部の透光部材の下面と同一面におかれるよう透明材料により形成されたガイド板を取付けるようにすれば、装置本体を被測定物の表面に確実に直角に当てることができるとともに測定箇所以外の近隣箇所も透けて見えるので装置本体の測定窓部を被測定箇所に正確に当てることができる。
【００１２】
上記ガイド板の下面に未乾燥の印刷箇所等に接触しないよう切欠部を形成することにより印刷直後の紙幣用紙の光沢値の検知時にも使用することが可能となる。
【００１３】
一方、前記装置本体の下部を挿入可能とし、その内底部の前記装置本体の測定窓部と正対する位置に無反射シートを有する０点を合せる０点合せ用補正ユニットと、装置本体の下部を挿入可能とし、その内底部の前記装置本体の測定窓部と正対する位置に反射光の基準となる光沢基準シートを有する光沢基準用補正ユニットとを設ければ、検知に先立ってその装置へのデータ入力を簡単に行なえるので好ましい。
【００１４】
【発明の実施の形態】
以下、本発明を図面に示す実施の形態を参照して説明する。
【００１５】
図１は本発明による光沢検知装置１の一実施形態の外観を示し、図２（Ａ）、（Ｂ）、図３（Ａ）、（Ｂ）はその正面、背面、下面、上面をそれぞれ示すもので、手に持つことのできる大きさを有する角筒状の装置本体２を有し、この装置本体２の下端は測定点を確認しやすいように逆尖塔角錐状に挟搾されており、その下端は平面視矩形状に開口されていてその内部に透光部材３が嵌着された測定窓部４とされ、前記透光部材３の下面が被測定物の表面に密接して置かれるようになっている。
【００１６】
上記透光部材３としては、厚さ３．８ｍｍ程度で上下面に硬質の反射防止膜（硬質ＴｉＯ₂膜）がコーティングされたガラス材が用いられている。
【００１７】
前記装置本体２の内部には、図４に拡大断面を示すように前記透光部材３の下面に垂直な垂線に対し所定角度（実施例では４５°）の傾斜をもって配設された投光器５と、この投光器５からの投射光Ｌ₁が前記透光部材３を透過して被測定物の表面で反射した反射光のうち正反射光Ｌ₂のみを受光し得る位置に配設された正反射光受光器６と、前記透光部材３の下面に垂直な垂線上に配設され、被測定物の表面で拡散反射する拡散反射光Ｌ₃を受光し得る拡散反射光受光器７とを備えており、これら投光器５および各受光器６，７は絞り５ａ，６ａ，７ａを具備している。
【００１８】
前記投光器５の光源としては、例えば発光ＬＥＤ等が用いられ、発光モニタ８を有していて、光源から所定の光量の光が投光されているか否かをチェックし、その値に応じて光源の光量が調整されるようになっており、常に所定の光量の光が投光されるようになっている。
【００１９】
前記装置本体２の上面２ａには、測定した光沢値をデジタル表示する表示部９と、後述する「補正」、「測定」の選択ボタン１０，１１と、「補正」、「光沢」、「測定」の表示切換スイッチ１２が設けられている。また装置本体２の前面側には電源スイッチ１３が、同後面側には電源ジャック１４およびデータ管理装置へ接続して使用する場合の通信ジャック１５が設けられている。
【００２０】
さらに前記装置本体２の前面下方部には、後述する補正ユニットへの挿入時の指標となる突起１６が設けられている。
【００２１】
前記装置本体２の下端の測定窓部４の外形状は測定紙面を平らに押接し得るように下面よりみて２０×２０（ｍｍ）程度の正四角形状に形成され、その窓枠１７の外側面は垂直な平坦面とされていて、この窓枠１７にガイド板１８が嵌着されるようになっている。
【００２２】
このガイド板１８は、図５に装置本体２に取付けた状態の断面図を、図６に下面図を示すように、透明な合成樹脂材により前記装置本体２の投影面と同大の正四角形状に形成されているとともに、前記窓枠１７の高さと同じ厚さに形成されており、その中央部には前記窓枠１７に可及的密に嵌合する取付孔１９が形成されている。
【００２３】
この取付孔１９の相隣り合う少なくとも２辺にそって該取付孔１９の辺に平行なスリット２０，２０が形成されていてその辺に弾性を持たせてあり、この取付孔１９が前記窓枠１７に弾性的に嵌着して乱りに脱落しないようになされている。
【００２４】
また前記ガイド板１８の下面には、被測定物が印刷直後の紙幣のように未乾燥の印刷部分のインキに接しないようにするため、該当箇所が削成されて切欠部２１，２１とされている。
【００２５】
したがってこのガイド板１８を装置本体２の下端の測定窓部４の窓枠１７に嵌着して使用するとき被測定物の表面にガイド板１８を置けばより安定した状態で接地するとともに測定しようとする箇所以外の部分も透けて見えるので測定窓部４を測定箇所に正確に位置付けすることができ、そのとき被測定物個有の接触しては困る箇所に切欠部２１，２１を形成したガイド板１８を用いることで例えば未乾燥状態の印刷物であってもインキに触れることなく光沢検知作業を行なうことができる。
【００２６】
図７（Ａ），（Ｂ）は、光沢測定に先立って光沢検知装置１の０点合わせ用の補正ユニット２２と、被測定物の光沢基準合わせ用の補正ユニット２３の各断面図を示すもので、いずれも装置本体２の下部を可及的密に挿入し得る凹陥状のユニット本体２４，２５を有し、その内側面縦方向には前記装置本体２の挿入時の向きを決定するため装置本体２の突起１６が嵌合し得るガイド溝２６，２７が形成されている。
【００２７】
０点合わせ用補正ユニット２２は、そのユニット本体２４の内底部に無反射（黒色）シート２８が固定的に設けられ、ユニット本体２４内に装置本体２の下部を挿入したときその測定窓部４の透光部材３からの投光は前記無反射シート２８により無反射となり、そのときの測定値を「０」とする。
【００２８】
光沢基準用補正ユニット２３は、そのユニット本体２５の内底部に測定基準材質の光沢基準シート２９が固定的に設けられ、ユニット本体２５内に装置本体２の下部を挿入したときその測定窓部４の透光部材３の下面が前記光沢基準シート２９に密接してそのときの測定値を基準値とするようになっている。
【００２９】
図８は本発明による光沢検知装置１の一使用態様としてデータ管理装置に接続してシステムとして使用する場合を示し、これと併せて上記光沢検知装置１の使用手順および機能について説明すると、光沢検知装置１の通信ジャック１５に通信ケーブル３０を接続してこのケーブル３０をデータ管理装置３１に接続し、必要によりこのデータ管理装置３１とプリンタ３２とを接続する。
【００３０】
使用時には、データ管理装置３１の電源スイッチをＯＮにすると、該管理装置３１の画面３３上に動作状態と操作有効キーが表示される。次いで光沢検知装置１の電源スイッチ１３をＯＮにすると、その表示部９に「２３２Ｃ」が約１０秒間表示されて通信モードに設定される。
【００３１】
次に光沢検知装置１の表示切換スイッチ１２を「補正」の位置に切換えてセットする。そして装置本体２を０点合わせ用補正ユニット２２のユニット本体２４内に挿入して下端の透光部材３の下面を無反射状態として「補正」の選択ボタン１０を１回押す。
【００３２】
これにより装置本体２の上面の表示部９に２種の数字、すなわち「−○○○」（正反射光値）と「＝○○○」（拡散反射光値）とが交互に約３０秒間表示される。
【００３３】
次いで装置本体２を光沢基準用補正ユニット２３のユニット本体２５に挿入して下端の透光部材３の下面を光沢基準シート２９に密接させ、この状態で「補正」の選択ボタン１０を１回押す。
【００３４】
これにより装置本体２の表示部９に２種の数字、すなわち「−○○○」（正反射光値）と「＝○○○」（拡散反射光値）とが交互に約３０秒間表示される。
【００３５】
続いて装置本体２を光沢基準用補正ユニット２３に挿入したままで装置本体２の表示切換スイッチ１２を「測定」の位置にセットして「測定」の選択ボタン１１を１回押す。
【００３６】
これにより装置本体２の表示部９に３種の数字「○○○」、「○○○−」、「○○○＝」が交互に約３０秒間表示される。実際には上記数字は１．０２〜０．９８の範囲が正常値であり、これから外れている場合は最初からやり直す。以上で準備操作は完了する。
【００３７】
被測定物の測定時には、光沢値を測定しようとする被測定物（例えば印刷後の紙幣の無地の部分）にガイド板１８を介して装置本体２を被測定面に対し垂直に置くと、投光器５から投光した光Ｌ₁は透光部材３を透過する間に屈折して被測定面に至り、その面で反射した正反射光Ｌ₂は透光部材３の上面で屈折して正反射光受光器６に入射し、被測定物の表面で拡散反射した拡散反射光Ｌ₃は拡散反射光受光器７に入射する。なお投光器５から投光して透光部材３の上面で反射した光Ｌ₄は正反射光受光器６の受光窓から外れた位置に至るので受光することがなく、正反射光のみを受光する。
【００３８】
上記正反射光受光器６が受光した正反射光量と、拡散反射光受光器７が受光した拡散反射光量との比、すなわち、
光沢値＝拡散反射光量／正反射光量
を演算し、その数値を表示部９に表示してその被測定物の光沢値を知る。
【００３９】
したがって光沢検知装置１を被測定物の表面に対し垂直に置くだけでその被測定物の表面の光沢値を直ちに知ることができる。
【００４０】
【発明の効果】
以上説明したように本発明によれば、被測定物の表面に投光した光の正反射光を正反射光受光器で受光し、拡散反射光を拡散反射光受光器で受光させ、正反射光と拡散反射光との割合をみて被測定物の光沢値を測定検知するようにしたことにより、被測定物の光沢値を高精度に検知することができ、被測定物が紙幣である場合、その用紙が所定の特性紙であるか、あるいは印刷時に輪転機の版胴により過剰に押圧されて紙質が変化していないかの判別をも確実に行なうことができる。また印刷部の各部位の光沢の正否も容易に確認することができる。
【００４１】
また請求項３のように投光器から投光して測定窓部の透光部材の上面で反射した光が正反射光受光器に入射しないように配設すれば、これら上面の乱反射による受光量の変動を抑えることができ、一層検知精度を高めることができる。
【００４２】
請求項２および４のように光沢検知装置の装置本体の測定窓部を下搾り尖塔状としたことおよび透明なガイド板を取付けるようにしたことにより、装置本体の測定窓部を被測定物の測定箇所に正確に位置させて測定することを容易にすることができるとともに安定した測定を可能とする。このときガイド板の下面に切欠部を設ければ、印刷直後の紙幣のようにインキが未乾燥の部分が測定箇所の近くに存在していてもこれに触れることなく測定を行なうことができる。
【００４３】
さらに請求項６のように補正ユニットを付設すれば、光沢検知装置の０点合わせおよび光沢基準合わせの操作を容易迅速に行なうことができ、光学素子、アンプ回路等の経年特性変動、および／または測定時の温・湿度等環境変動に対しても適正に補正された信頼性の高い測定値を得ることができる。
【図面の簡単な説明】
【図１】本発明による光沢検知装置の一実施形態を示す外観斜視図。
【図２】（Ａ）は図１の正面図、（Ｂ）は同背面図。
【図３】（Ａ）は図２（Ａ）の下面図、（Ｂ）は上面図。
【図４】図３（Ａ）のＡ−Ａ拡大断面図。
【図５】ガイド板を装置本体に取付けた状態の断面図。
【図６】ガイド板の下面図。
【図７】（Ａ）は０点合わせ用補正ユニット、（Ｂ）は光沢基準用ユニットの各断面図。
【図８】本発明による光沢検知装置の一使用形態としてデータ管理装置に接続してシステムとして使用する場合の一例を示す構成図。
【符号の説明】
１光沢検知装置
２装置本体
３透光部材
４測定窓部
５投光器
６正反射光受光器
７拡散反射光受光器
８発光モニタ
９表示部
１０，１１選択ボタン
１２表示切換スイッチ
１６突起
１７窓枠
１８ガイド板
１９取付孔
２０スリット
２１切欠部
２２０点合わせ用補正ユニット
２３光沢基準用補正ユニット
２４，２５ユニット本体
２６，２７ガイド溝
２８無反射シート
２９光沢規準シート
３１データ管理装置[0001]
BACKGROUND OF THE INVENTION
INDUSTRIAL APPLICABILITY The present invention is suitable for detecting the gloss value of the surface of paper sheets such as banknotes, securities, etc., and making the paper quality and / or printing surface uniform of the paper sheets, and separating different kinds of paper sheets. The present invention relates to a gloss detection device, and more particularly, to a gloss detection device that can quickly detect a gloss value at an arbitrary desired position by holding it.
[0002]
[Prior art]
For example, in the case of banknotes, paper quality is made with a predetermined material to a predetermined thickness, and uniform paper is used. However, the surface gloss may vary depending on various conditions.
[0003]
In banknotes, a banknote pattern of 20 sheets in a total of 4 rows and 5 rows is normally printed (large format printing) on a single sheet of paper, but the paper is excessively pressed by the pressing force of the plate cylinder of a printing press. The gloss of the surface of the partial and / or whole paper varies.
[0004]
On the other hand, as a conventional device for detecting the gloss of the surface of an object to be measured, a projector that enters the object to be measured at a predetermined angle, and the reflected light reflected by the surface of the object to be measured is received by the light projected from the projector. In this method, the gloss value of the surface of the object to be measured is determined by knowing the light quantity (reflectance) of the reflected light.
[0005]
[Problems to be solved by the invention]
Thus, in the case of large-format printing of banknotes as described above, if the pressing force of the plate cylinder is excessive, the gloss value of the surface is different, and variations in quality due to fluctuations in these characteristic values are undesirable from the viewpoint of preventing counterfeiting of banknotes. It happens. The same applies to other securities.
[0006]
In addition, when trying to detect the gloss value of the banknote surface with a conventional gloss detector, if you want to detect a large banknote in the state where the ink is undried immediately after printing, light should be accurately projected to any detection location. However, it is difficult to accurately grasp the light reflection state based on the state of the paper.
[0007]
The present invention provides a gloss detector that receives both regular reflection light and diffuse reflection light from a projector, and detects the gloss of the surface of an object to be measured based on the ratio of the amount of reflected light of both. There is.
[0008]
In addition, the gloss detecting device can be configured as a handy type, and the gloss value of the paper surface at an arbitrary desired position can be immediately detected in papermaking and / or printing processes such as banknotes.
[0009]
[Means for Solving the Problems]
As means for solving the above-mentioned problems, the present invention provides a device main body which can be held by hand, a measurement window portion which is opened in the shape of a spire at the lower end of the device main body, and is provided in the device main body and is perpendicular to the main body. A projector disposed so as to project light at a predetermined angle with respect to a straight line, a regular reflection light receiver that receives light projected from the projector and specularly reflected by the surface of the measurement object, and the measurement object A diffuse reflection light receiver that receives light diffusely reflected by the surface of the light source, and the gloss of the object to be measured is detected by the ratio of the regular reflection light and the diffuse reflection light.
[0010]
Providing the translucent member in the measurement window so as to be in close contact with the surface of the object to be measured is preferable in obtaining the flatness of the measurement location of the object to be measured, and the detection accuracy can be increased.
The specularly reflected light receiver receives only specularly reflected light that is refracted and incident on the translucent member disposed in the measurement window and is specularly reflected by the object to be measured, and is reflected by the upper surface of the translucent member. It is preferable to arrange at a position where light is not received.
[0011]
If a guide plate made of a transparent material is attached to the window frame of the measurement window portion of the device main body so that the lower surface is flush with the lower surface of the transparent member of the measurement window portion, the device main body is measured. Since it can be surely applied to the surface of the object at a right angle and the neighboring part other than the measurement part can be seen through, the measurement window portion of the apparatus main body can be accurately applied to the measurement target part.
[0012]
By forming a notch portion on the lower surface of the guide plate so as not to come into contact with an undried printing location, the guide plate can be used when detecting the gloss value of banknote paper immediately after printing.
[0013]
On the other hand, the lower part of the apparatus main body can be inserted, and a zero-pointing correction unit for aligning the zero point having the non-reflective sheet at a position facing the measurement window part of the apparatus main body at the inner bottom thereof, and a lower part of the apparatus main body If a gloss reference correction unit having a gloss reference sheet serving as a reference for reflected light is provided at a position directly facing the measurement window of the device main body at the inner bottom of the device, prior to detection, the device can be connected to the device. It is preferable because data can be easily input.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings.
[0015]
FIG. 1 shows the appearance of an embodiment of the gloss detecting device 1 according to the present invention, and FIGS. 2A, 2B, 3A, and 3B show the front, back, bottom, and top surfaces, respectively. It has a rectangular tube-shaped device main body 2 having a size that can be held in the hand, and the lower end of the device main body 2 is squeezed into an inverted spire pyramid shape so that the measurement point can be easily confirmed, The lower end of the measuring window 4 is opened in a rectangular shape in plan view and the translucent member 3 is fitted therein, and the lower surface of the translucent member 3 is placed in close contact with the surface of the object to be measured. It is like that.
[0016]
As the translucent member 3, a glass material having a thickness of about 3.8 mm and having a hard antireflection film (hard TiO ₂ film) coated on the upper and lower surfaces is used.
[0017]
As shown in an enlarged cross-section in FIG. 4, a projector 5 is disposed in the apparatus main body 2 with an inclination of a predetermined angle (45 ° in the embodiment) with respect to a perpendicular perpendicular to the lower surface of the translucent member 3. The regular reflection is arranged at a position where the projection light L ₁ from the projector 5 can receive only the regular reflection light L ₂ out of the reflection light transmitted through the light transmitting member 3 and reflected by the surface of the object to be measured. a light receiving unit 6, the disposed on a line perpendicular to the lower surface of the translucent member 3, and a diffuse reflection light receiving device 7 capable of receiving the diffusely reflected light L ₃ for diffuse reflected by the surface of the object to be measured The light projector 5 and the light receivers 6 and 7 have diaphragms 5a, 6a and 7a.
[0018]
As the light source of the projector 5, for example, a light emitting LED or the like is used, and it has a light emission monitor 8 to check whether or not a predetermined amount of light is being projected from the light source. The amount of light is adjusted, and a predetermined amount of light is always projected.
[0019]
On the upper surface 2a of the apparatus main body 2, a display unit 9 for digitally displaying the measured gloss value, selection buttons 10 and 11 for “correction” and “measurement” to be described later, “correction”, “gloss”, “measurement” Is displayed. Further, a power switch 13 is provided on the front side of the apparatus main body 2, and a power jack 14 and a communication jack 15 when used by connecting to a data management apparatus are provided on the rear side.
[0020]
Further, a projection 16 serving as an index when inserted into a correction unit, which will be described later, is provided at the lower part of the front surface of the apparatus body 2.
[0021]
The outer shape of the measurement window 4 at the lower end of the apparatus body 2 is formed in a regular square shape of about 20 × 20 (mm) when viewed from the lower surface so that the measurement paper surface can be pressed flatly. Is a vertical flat surface, and a guide plate 18 is fitted into the window frame 17.
[0022]
The guide plate 18 is a regular square having the same size as the projection surface of the apparatus main body 2 made of a transparent synthetic resin material, as shown in FIG. It is formed in a shape and has the same thickness as the height of the window frame 17, and a mounting hole 19 that fits the window frame 17 as closely as possible is formed in the center thereof. .
[0023]
Slits 20, 20 parallel to the side of the mounting hole 19 are formed along at least two adjacent sides of the mounting hole 19, and the side has elasticity, and the mounting hole 19 is the window frame. 17 is elastically fitted so as not to fall off randomly.
[0024]
In addition, on the lower surface of the guide plate 18, in order to prevent the object to be measured from coming into contact with the ink of the undried printed portion like a bill immediately after printing, the corresponding portion is cut into the cutout portions 21 and 21. ing.
[0025]
Therefore, when this guide plate 18 is used by being fitted to the window frame 17 of the measurement window 4 at the lower end of the apparatus main body 2, if the guide plate 18 is placed on the surface of the object to be measured, it will be grounded and measured in a more stable state. The measurement window 4 can be accurately positioned at the measurement location, and notches 21 and 21 are formed at locations where it is difficult to contact the measured object at that time. By using the guide plate 18, the gloss detection operation can be performed without touching the ink, for example, even in an undried printed matter.
[0026]
7A and 7B are sectional views of the correction unit 22 for zero-point alignment of the gloss detection device 1 and the correction unit 23 for gloss reference alignment of the object to be measured prior to gloss measurement. In order to determine the orientation of the apparatus body 2 when the apparatus body 2 is inserted, the unit bodies 24 and 25 have recessed shapes into which the lower part of the apparatus body 2 can be inserted as densely as possible. Guide grooves 26 and 27 into which the protrusions 16 of the apparatus main body 2 can be fitted are formed.
[0027]
The zero-pointing correction unit 22 has a non-reflective (black) sheet 28 fixedly provided on the inner bottom of the unit main body 24, and when the lower part of the apparatus main body 2 is inserted into the unit main body 24, the measurement window 4 The light projection from the translucent member 3 becomes non-reflective by the non-reflective sheet 28, and the measured value at that time is “0”.
[0028]
The gloss reference correction unit 23 is provided with a gloss reference sheet 29 made of a measurement reference material fixedly on the inner bottom of the unit body 25. When the lower part of the apparatus body 2 is inserted into the unit body 25, the measurement window 4 The lower surface of the translucent member 3 is in close contact with the gloss reference sheet 29, and the measured value at that time is used as a reference value.
[0029]
FIG. 8 shows a case where the gloss detection apparatus 1 according to the present invention is used as a system by connecting to a data management apparatus. The usage procedure and function of the gloss detection apparatus 1 will be described together with this. A communication cable 30 is connected to the communication jack 15 of the apparatus 1, the cable 30 is connected to the data management apparatus 31, and the data management apparatus 31 and the printer 32 are connected as necessary.
[0030]
In use, when the power switch of the data management device 31 is turned on, the operation state and the operation valid key are displayed on the screen 33 of the management device 31. Next, when the power switch 13 of the gloss detecting device 1 is turned on, “232C” is displayed on the display unit 9 for about 10 seconds, and the communication mode is set.
[0031]
Next, the display changeover switch 12 of the gloss detecting device 1 is set to the “correction” position. Then, the apparatus main body 2 is inserted into the unit main body 24 of the zero-pointing correction unit 22, the lower surface of the translucent member 3 at the lower end is made non-reflective, and the “correction” selection button 10 is pressed once.
[0032]
As a result, two numbers, that is, “− ◯◯◯” (regular reflection light value) and “= ◯◯◯” (diffuse reflection light value) are alternately displayed on the display unit 9 on the upper surface of the apparatus main body 2 for about 30 seconds. Is displayed.
[0033]
Next, the apparatus main body 2 is inserted into the unit main body 25 of the gloss reference correction unit 23 so that the lower surface of the translucent member 3 at the lower end is brought into close contact with the gloss reference sheet 29. In this state, the “correction” selection button 10 is pressed once. .
[0034]
As a result, two numbers, that is, “− ◯◯◯” (regular reflection light value) and “= ◯◯◯” (diffuse reflection light value) are alternately displayed on the display unit 9 of the apparatus main body 2 for about 30 seconds. The
[0035]
Subsequently, with the apparatus main body 2 being inserted into the gloss reference correction unit 23, the display changeover switch 12 of the apparatus main body 2 is set to the “measurement” position, and the “measurement” selection button 11 is pressed once.
[0036]
As a result, three types of numbers “XXX”, “XXX-”, and “XXX =” are alternately displayed on the display unit 9 of the apparatus main body 2 for about 30 seconds. Actually, the above numbers are normal values in the range of 1.02 to 0.98. This completes the preparation operation.
[0037]
At the time of measuring the object to be measured, if the apparatus main body 2 is placed perpendicularly to the surface to be measured via the guide plate 18 on the object to be measured (for example, a plain part of the banknote after printing), a projector is provided. The light L ₁ projected from 5 is refracted while passing through the translucent member 3 and reaches the surface to be measured, and the specularly reflected light L ₂ reflected on the surface is refracted on the upper surface of the translucent member 3 and is specularly reflected. The diffusely reflected light L ₃ incident on the optical receiver 6 and diffusely reflected on the surface of the object to be measured enters the diffusely reflected light receiver 7. The light L ₄ projected from the projector 5 and reflected from the upper surface of the translucent member 3 reaches a position outside the light receiving window of the regular reflection light receiver 6, so that it is not received and receives only the regular reflection light. .
[0038]
The ratio between the regular reflection light amount received by the regular reflection light receiver 6 and the diffuse reflection light amount received by the diffuse reflection light receiver 7, that is,
Gloss value = diffuse reflected light amount / regular reflected light amount is calculated, and the numerical value is displayed on the display unit 9 to know the gloss value of the object to be measured.
[0039]
Therefore, it is possible to immediately know the gloss value of the surface of the object to be measured simply by placing the gloss detector 1 perpendicular to the surface of the object to be measured.
[0040]
【The invention's effect】
As described above, according to the present invention, the specular reflection light of the light projected on the surface of the object to be measured is received by the specular reflection light receiver, and the diffuse reflection light is received by the diffuse reflection light receiver. When the gloss value of the object to be measured is measured and detected by looking at the ratio of light and diffuse reflected light, the gloss value of the object to be measured can be detected with high accuracy, and the object to be measured is a banknote. It is also possible to reliably determine whether the paper is a predetermined characteristic paper or whether the paper quality has not changed due to being excessively pressed by the plate cylinder of the rotary press during printing. In addition, it is possible to easily confirm whether the gloss of each part of the printing unit is correct or not.
[0041]
If the light is emitted from the projector and reflected from the upper surface of the translucent member of the measurement window portion so as not to enter the regular reflection light receiver, the amount of light received by the irregular reflection of these upper surfaces can be reduced. Variations can be suppressed and detection accuracy can be further increased.
[0042]
The measurement window part of the apparatus main body of the gloss detection apparatus is squeezed down into a spire shape and a transparent guide plate is attached as in claims 2 and 4, so that the measurement window part of the apparatus main body is attached to the object to be measured. It is possible to easily place the measurement accurately at the measurement location and to perform stable measurement. At this time, if a notch is provided on the lower surface of the guide plate, measurement can be performed without touching a portion where the ink is undried, such as a bill immediately after printing, near the measurement location.
[0043]
Further, if a correction unit is attached as in claim 6, the operation of zero-point alignment and gloss reference alignment of the gloss detecting device can be performed easily and quickly, variation in aged characteristics of optical elements, amplifier circuits, etc., and / or It is possible to obtain highly reliable measurement values that are appropriately corrected for environmental fluctuations such as temperature and humidity during measurement.
[Brief description of the drawings]
FIG. 1 is an external perspective view showing an embodiment of a gloss detecting device according to the present invention.
2A is a front view of FIG. 1, and FIG. 2B is a rear view of the same.
3A is a bottom view of FIG. 2A, and FIG. 3B is a top view.
4 is an AA enlarged cross-sectional view of FIG.
FIG. 5 is a cross-sectional view of a state in which a guide plate is attached to the apparatus main body.
FIG. 6 is a bottom view of the guide plate.
7A is a cross-sectional view of a zero-point correction unit, and FIG. 7B is a cross-sectional view of a gloss reference unit.
FIG. 8 is a configuration diagram showing an example of a case where the gloss detection apparatus according to the present invention is used as a system by connecting to a data management apparatus as one usage pattern.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Gloss detection apparatus 2 Apparatus main body 3 Translucent member 4 Measuring window part 5 Light projector 6 Regular reflection light receiver 7 Diffuse reflection light receiver 8 Luminescence monitor 9 Display part 10,11 Selection button 12 Display change switch 16 Protrusion 17 Window frame 18 Guide plate 19 Mounting hole 20 Slit 21 Notch 22 Correction unit 23 for zero alignment Gloss reference correction unit 24, 25 Unit body 26, 27 Guide groove 28 Non-reflective sheet 29 Gloss reference sheet 31 Data management device

Claims

In the gloss detection device for the surface of a paper sheet for detecting the gloss of the surface of a paper sheet such as banknotes or securities,
A device body that can be hand-held to any measurement site on the paper sheet to be measured;
A measurement window portion having a translucent member formed in the shape of a squeezed spire provided at the lower end of the apparatus main body and capable of being in surface contact with the paper sheet to be measured;
A projector provided in the apparatus main body, and disposed to project light at a predetermined angle with respect to a line perpendicular to a surface of the translucent member that contacts the measured paper sheet ;
A regular reflection light receiver that receives light projected from the projector and specularly reflected by the paper surface of the measured sheet;
A diffuse reflection light receiver that is disposed on the vertical line and receives the light emitted from the light projector and diffusely reflected by the paper surface of the measured paper sheet;
The specular reflection light receiver receives only specular reflection light that is refracted and incident on the translucent member disposed in the measurement window and is specularly reflected by the paper surface of the paper sheet to be measured. It is arranged at a position where it does not receive the reflected light reflected from the top surface,
A gloss detecting device for a surface of a paper sheet, wherein the gloss of the surface of the paper sheet is detected based on a ratio between the regular reflection light and the diffuse reflection light.

2. The paper according to claim 1, further comprising a guide plate made of a transparent material and fitted to a window frame of the measurement window portion of the apparatus main body so that the lower surface is flush with the lower surface of the measurement window portion. Gloss detection device for leaf surfaces.

The gloss of the surface of a paper sheet according to claim 2, wherein the guide plate is detachably attached to the window frame of the measurement window portion, and has a notch portion for preventing contact with a printing portion prohibited from being set on a lower surface. Detection device.

A protrusion is provided on a side surface of the apparatus main body,
It has a guide groove for guiding a protrusion provided on the side surface of the apparatus main body so that the lower part of the apparatus main body can be inserted, and a non-reflective sheet is provided at a position facing the measurement window of the apparatus main body at the inner bottom thereof. A zero-point correction unit used for setting the non-reflecting state of the apparatus body;
A guide groove for guiding a protrusion provided on the side surface of the apparatus main body, allowing a lower portion of the apparatus main body to be inserted, and a reference of reflected light at a position facing the measurement window portion of the apparatus main body on the inner bottom thereof The gloss detection device for a sheet surface according to any one of claims 1 to 3, further comprising a gloss reference correction unit for setting a gloss reference of the apparatus main body.