JP5473101B2 - Paper state detection method and paper state detection device - Google Patents

Paper state detection method and paper state detection device Download PDF

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JP5473101B2
JP5473101B2 JP2008263549A JP2008263549A JP5473101B2 JP 5473101 B2 JP5473101 B2 JP 5473101B2 JP 2008263549 A JP2008263549 A JP 2008263549A JP 2008263549 A JP2008263549 A JP 2008263549A JP 5473101 B2 JP5473101 B2 JP 5473101B2
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sheet
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JP2010089943A (en
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恭広 内田
裕介 桃野
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Hitachi Information and Telecommunication Engineering Ltd
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Description

本発明は、光学的文字読取装置や画像複写装置等の用紙を搬送する用紙搬送装置における搬送異常が発生する可能性のある用紙の状態を検知することができる用紙状態検知方法及び用紙状態検知装置に係り、特にジャムが発生する可能性がある用紙の状態を予め検知することができる用紙状態検知方法及び用紙状態検知装置に関する。   The present invention relates to a paper state detection method and a paper state detection device capable of detecting a state of a sheet that may cause a conveyance abnormality in a sheet conveyance device that conveys a sheet such as an optical character reader or an image copying apparatus. In particular, the present invention relates to a paper state detection method and a paper state detection device capable of detecting in advance a paper state that may cause a jam.

一般に光学的文字読取システム、画像複写システム、画像複写システム、印刷システム等において用紙を搬送する用紙搬送装置は、給紙トレイに積層した用紙を互いに逆方向回転する一対の送り出しローラにより一枚ずつ繰り出して用紙搬送路に供給する機能や、搬送路中で搬送する用紙のジャムを検知する機能が要求されている。   In general, a paper transport device that transports paper in an optical character reading system, an image copying system, an image copying system, a printing system, etc., feeds the paper stacked on a paper feed tray one by one by a pair of feed rollers that rotate in opposite directions. Therefore, there is a demand for a function for supplying paper to the paper conveyance path and a function for detecting a jam of the paper conveyed in the conveyance path.

従来技術によるジャム検知機能は、用紙を給紙する一対の給紙ローラの用紙厚み方向の変位を監視し、厚み方向変位が所定量を超えたときにジャムと検知する技術や、搬送路に沿って並べられた給紙ローラ間を搬送される用紙の搬送時間が所定の搬送時間を超えると判定したときにジャムと検知する技術が挙げられる。   The jam detection function according to the prior art monitors the displacement in the sheet thickness direction of a pair of paper feed rollers that feed paper, and detects a jam when the displacement in the thickness direction exceeds a predetermined amount. For example, there is a technique for detecting a jam when it is determined that the conveyance time of a sheet conveyed between the sheet feeding rollers arranged in a row exceeds a predetermined conveyance time.

尚、ジャム検知機能を有する用紙搬送装置が記載された文献としては、下記特許文献１が挙げられ、この特許文献１には、用紙の搬送時間を監視するために用紙有無を用紙反射光により検知する技術が記載されている。
特開２００８−３６５０号公報 As a document describing a paper conveyance device having a jam detection function, the following Patent Document 1 is cited. In this Patent Document 1, the presence or absence of a sheet is detected by a sheet reflected light in order to monitor the sheet conveyance time. The technology to do is described.
JP 2008-3650 A

前述した従来技術による用紙搬送装置は、用紙のジャムを検知することができるものの、ジャム等の搬送異常が発生した後でなければ用紙搬送異常を検知することができないと言う不具合があった。例えば用紙がステープラー（ホチキス）で止められている場合、用紙を１枚ずつ分離する一対の送り出しローラによって用紙ジャムが発生するものであるが、送り出しローラの物理的な上下位置の変化や搬送時間監視によってジャムを検知するため、用紙ジャムが発生した後でなければ用紙の搬送異常を検知することができないと言う不具合があった。   The above-described conventional paper transport apparatus can detect a paper jam, but has a problem in that a paper transport abnormality cannot be detected unless a paper transport abnormality has occurred. For example, when the paper is stopped by a stapler (paper staple), a paper jam occurs due to a pair of feed rollers that separate the paper one by one. Therefore, there is a problem in that a paper conveyance abnormality cannot be detected unless a paper jam has occurred.

本発明の目的は、ステープラーが止められた用紙を予め検知することができる用紙状態検知方法及び用紙状態検知装置を提供することである。 An object of the present invention is to provide a sheet state detection method and a sheet state detection apparatus which can previously detect the paper scan Tepura was stopped.

前記目的を達成するため本発明は、シート状の用紙の所定速度による搬送時の挙動を検知する用紙状態検知装置であって、搬送される用紙表面の所定領域に用紙表面に対して斜め方向から光を照射する光源と、該光源から照射され、前記用紙表面から反射した反射光を受光するレンズと、該レンズから出射された反射光を一定周期毎の連続する二次元画像情報として受光する二次元センサ素子と、前記用紙を所定速度で正常搬送したときの前記反射光に基づく二次元センサ素子が受光した二次元画像情報の用紙厚み方向の変位許容範囲量を記憶するメモリとを備え、前記制御部が、二次元センサ素子が受光した二次元画像情報を基に用紙表面の凹凸量を含む凹凸情報を抽出し、該抽出した凹凸情報が、連続する２つの二次元画像情報における凹凸量の変化量が前記メモリに記憶した用紙厚み方向の変位量範囲を超えたとき、用紙の異常搬送と判定することを第１の特徴とする。 In order to achieve the above object, the present invention is a paper state detection device for detecting the behavior of a sheet-like paper during conveyance at a predetermined speed, wherein a predetermined region on the surface of the conveyed paper is obliquely directed to the surface of the paper. A light source that irradiates light, a lens that receives reflected light emitted from the light source and reflected from the surface of the paper, and two-dimensional image information that receives reflected light emitted from the lens as continuous two-dimensional image information at a fixed period. A two-dimensional image information received by the two-dimensional sensor element based on the reflected light when the paper is normally conveyed at a predetermined speed, and a memory that stores a displacement allowable range amount in the paper thickness direction. The control unit extracts the unevenness information including the unevenness amount on the paper surface based on the two-dimensional image information received by the two-dimensional sensor element, and the extracted unevenness information is included in two continuous two-dimensional image information. When the amount of change in projection height exceeds the displacement range of the sheet thickness direction stored in the memory, the first determining means determines that the abnormal conveyance of the sheet.

また、本発明は、第１の特徴の用紙状態検知装置において、前記用紙表面に対して斜め方向から照射する照射角度が、用紙表面に対して５度〜２０度の所定の角度としたことを第２の特徴とし、第２の特徴の用紙状態検知装置において、前記制御部が、前記斜め方向から用紙に照射した反射光を二次元画像情報として取得し、一定周期内で連続する２つの二次元画像情報のフレーム間の差異を二次元画像情報に含まれる凸部頂点又は凹部底部の縦横移動量として抽出し、前記凸部頂点又は凹部底部の縦横移動量の変化を基に用紙表面状態のＸＹＺ方向の変化として抽出し、前記抽出した変化量が正常搬送時の所定変化量を超えると判定したときに、用紙搬送異常が発生したと判定することを第３の特徴とする。According to the present invention, in the paper state detection device according to the first feature, the irradiation angle applied to the paper surface from an oblique direction is a predetermined angle of 5 degrees to 20 degrees with respect to the paper surface. As a second feature, in the paper state detection device according to the second feature, the control unit acquires reflected light applied to the paper from the oblique direction as two-dimensional image information, and two two continuous images within a fixed period. The difference between frames of the two-dimensional image information is extracted as the vertical and horizontal movement amount of the convex vertex or concave bottom included in the two-dimensional image information, and the surface condition of the paper is determined based on the change of the vertical and horizontal movement amount of the convex vertex or concave bottom. A third feature is that when a change in the XYZ directions is extracted and it is determined that the extracted change amount exceeds a predetermined change amount during normal conveyance, it is determined that a paper conveyance abnormality has occurred.

さらに、本発明は、搬送されるシート状の用紙表面の所定領域に用紙表面に対して斜め方向から光を照射する光源と、該光源から照射され、前記用紙表面から反射した反射光を受光するレンズと、該レンズから出射された反射光を一定周期毎の連続する二次元画像情報として受光する二次元センサ素子と、前記用紙を所定速度で正常搬送したときの前記反射光に基づく二次元センサ素子が受光した二次元画像情報の用紙厚み方向の変位許容範囲量を記憶するメモリと、該メモリに記憶した正常許容範囲値及び前記二次元センサ素子により受光した反射光を基に用紙搬送時における挙動を検知する制御部を備える用紙状態検知装置の用紙検知状態検知方法であって、前記制御部が、二次元センサ素子が受光した二次元画像情報を基に用紙表面の凹凸量を含む凹凸情報を抽出し、該抽出した凹凸情報が、連続する２つの二次元画像情報における凹凸量の変化量が前記メモリに記憶した用紙厚み方向の変位量範囲を超えたとき、用紙の異常搬送と判定することを第４の特徴とする。 Furthermore, the present invention provides a light source that irradiates light to a predetermined area on the surface of a sheet-like sheet to be conveyed from an oblique direction with respect to the sheet surface, and receives reflected light that is irradiated from the light source and reflected from the sheet surface. A lens, a two-dimensional sensor element that receives reflected light emitted from the lens as continuous two-dimensional image information for each predetermined period, and a two-dimensional sensor based on the reflected light when the paper is normally conveyed at a predetermined speed A memory for storing the amount of allowable displacement in the sheet thickness direction of the two-dimensional image information received by the element, the normal allowable range value stored in the memory, and the reflected light received by the two-dimensional sensor element during paper conveyance A sheet detection state detection method of a sheet state detection apparatus including a control unit that detects a behavior, wherein the control unit detects a surface of a sheet based on two-dimensional image information received by a two-dimensional sensor element. When the unevenness information including the protrusion amount is extracted, and the extracted unevenness information indicates that the variation amount of the unevenness amount in the two continuous two-dimensional image information exceeds the displacement amount range in the sheet thickness direction stored in the memory, the sheet It is a fourth feature that it is determined that the abnormal conveyance .

また、本発明は、前記第４の特徴の用紙検知状態検知方法において、前記光源が、用紙表面に対して５度〜２０度の所定の角度とした光を前記用紙表面に照射することを第５の特徴とし、第５の特徴の記載の用紙状態検知方法において、前記制御部が、前記斜め方向から用紙に照射した反射光を二次元画像情報として取得し、一定周期内で連続する２つの二次元画像情報のフレーム間の差異を二次元画像情報に含まれる凸部頂点又は凹部底部の縦横移動量として抽出し、前記凸部頂点又は凹部底部の縦横移動量の変化を基に用紙表面状態のＸＹＺ方向の変化として抽出し、前記抽出した変化量が正常搬送時の所定変化量を超えると判定したときに、用紙搬送異常が発生したと判定することを第６の特徴とする。According to the present invention, in the paper detection state detection method of the fourth feature, the light source irradiates the paper surface with light having a predetermined angle of 5 degrees to 20 degrees with respect to the paper surface. In the paper state detection method described in the fifth feature, the control unit acquires reflected light applied to the paper from the oblique direction as two-dimensional image information, and two continuous images within a predetermined period. The difference between the frames of the two-dimensional image information is extracted as the amount of vertical and horizontal movement of the convex vertex or concave bottom included in the two-dimensional image information, and the surface condition of the paper based on the change of the vertical and horizontal movement of the convex vertex or concave bottom A sixth feature is that when a change in the XYZ direction is extracted and it is determined that the extracted change amount exceeds a predetermined change amount during normal conveyance, it is determined that a paper conveyance abnormality has occurred.

本発明による用紙状態検知装置及び方法は、二次元センサ素子が受光した二次元画像情報を基に用紙表面の凹凸量を含む凹凸情報を抽出し、該抽出した凹凸情報が、連続する２つの二次元画像情報における凹凸量の変化量が前記メモリに記憶した用紙厚み方向の変位量範囲を超えたとき、用紙の異常搬送と判定することにより、用紙表面の凹凸の挙動を高精度に検知することができる。 The paper state detection apparatus and method according to the present invention extract unevenness information including the amount of unevenness on the surface of a paper based on two-dimensional image information received by a two-dimensional sensor element, and the extracted unevenness information includes two continuous two-dimensional information. When the amount of change in the unevenness in the three-dimensional image information exceeds the displacement amount range in the sheet thickness direction stored in the memory, it is possible to detect the unevenness on the surface of the paper with high accuracy by determining that the paper is abnormally conveyed. Can do.

以下、本発明の一実施形態による用紙状態検知方法を採用した用紙状態検知装置を詳細に説明する。図１は、本実施形態による用紙状態検知装置を含む用紙搬送装置の全体構成図、図２は本実施形態による用紙状態検知装置の回路構成を示す図、図３は本実施形態による立体センサの原理を説明するための図、図４は本実施形態による判定処理部の動作フロー図、図５は本実施形態による立体センサの検知信号を説明するための図、図６は本実施形態によるステープラー検知時の検知信号を説明するための図である。   Hereinafter, a paper state detection apparatus employing a paper state detection method according to an embodiment of the present invention will be described in detail. FIG. 1 is an overall configuration diagram of a sheet conveying device including a sheet status detecting device according to the present embodiment, FIG. 2 is a diagram showing a circuit configuration of the sheet status detecting device according to the present embodiment, and FIG. 3 is a diagram of a three-dimensional sensor according to the present embodiment. FIG. 4 is a diagram for explaining the principle, FIG. 4 is an operation flow diagram of the determination processing unit according to this embodiment, FIG. 5 is a diagram for explaining detection signals of the three-dimensional sensor according to this embodiment, and FIG. 6 is a stapler according to this embodiment. It is a figure for demonstrating the detection signal at the time of a detection.

［構成］
本実施形態による用紙状態検知装置を含む用紙搬送装置は、図１に示す如く、積層した複数の用紙６上に配置される本実施形態の特徴である二次元センサ部１を含む用紙状態検知装置と、回転により積層された用紙６の上から順に繰り出す摩擦ローラ７と、該摩擦ローラ７から送り出された用紙６を挟持する様に位置し、逆方向に回転することによって用紙の分離を行う送り出しローラ８及び９と、該送り出しローラ８及び９により分離された用紙６を回転挟持して搬送する搬送ローラ１０及び１１とから構成される。 [Constitution]
As shown in FIG. 1, a sheet conveying apparatus including a sheet state detecting apparatus according to the present embodiment includes a two-dimensional sensor unit 1 that is a feature of the present embodiment and is arranged on a plurality of stacked sheets 6. And a friction roller 7 that sequentially feeds the stacked sheets 6 by rotation, and a sheet feeding unit that is positioned so as to sandwich the sheet 6 fed from the friction roller 7 and rotates in the opposite direction to separate the sheets. The rollers 8 and 9 and transport rollers 10 and 11 for transporting the paper 6 separated by the feed rollers 8 and 9 while rotating and sandwiching the paper 6 are configured.

前記二次元センサ部１は、図３（ａ）に示す如く、被照射物である用紙に傾斜角度（好適には５度〜２０度）をもつ光（赤外線光を含む）又はレーザ光を照射する発光ダイオードであるＬＥＤ２と、該ＬＥＤ２から照射され、用紙６の表面から反射された光を受光するレンズ３と、該レンズ３を通して平行光又は拡大光に変換された光を受光するセンサ素子４と、前記用紙に照射する領域を決めるために開口部した読取部５を含み、前記素子等を内部に収納する筐体とから構成される。   As shown in FIG. 3A, the two-dimensional sensor unit 1 irradiates light (including infrared light) or laser light having a tilt angle (preferably 5 degrees to 20 degrees) to a paper that is an object to be irradiated. LED 2 that is a light emitting diode, a lens 3 that receives light emitted from the LED 2 and reflected from the surface of the paper 6, and a sensor element 4 that receives light converted to parallel light or enlarged light through the lens 3. And a reading unit 5 having an opening for determining an area to be irradiated on the paper, and a housing for storing the elements and the like therein.

この二次元センサ部１は、被照射対象物（本例では用紙６）に対してＬＥＤ２が光又はレーザ光を斜めから照射し、センサ素子４が一定周期毎に被照射対象物にて反射した光又はレーザ光を二次元画像情報（フレームとも呼ぶ）として受光することによって、図３（ｂ）に示す如く、ある読取フレームエリア３０における用紙６の凹凸３２を含む二次元画像情報を取得することができる。この用紙６の凹凸３２を含む二次元画像情報を取得することができる理由は、傾斜角度をもって照射された用紙からの反射光が、用紙の凹凸によりハイライト部分と影部分が生じ、このハイライト部分と影部分の集合によって用紙表面
凹凸が投影されるためである。 In the two-dimensional sensor unit 1, the LED 2 irradiates light or laser light from an oblique direction with respect to the irradiation target object (paper 6 in this example), and the sensor element 4 is reflected by the irradiation target object at regular intervals. By receiving light or laser light as two-dimensional image information (also referred to as a frame), two-dimensional image information including the irregularities 32 of the paper 6 in a certain reading frame area 30 is acquired as shown in FIG. Can do. The reason why the two-dimensional image information including the unevenness 32 of the paper 6 can be acquired is that the reflected light from the paper irradiated with the inclination angle causes a highlight portion and a shadow portion due to the unevenness of the paper. This is because the paper surface unevenness is projected by the set of the portion and the shadow portion.

前記用紙状態検知装置は、図２に示す如く、前述した二次元センサ部１と、該二次元センサ部１のＬＥＤ２を発光させるＬＥＤ駆動回路１２と、前記センサ素子４により受光した反射光を基に二次元画像情報を生成する画像処理を行う画像処理回路１３と、該画像処理回路１３により生成された二次元画像情報を一時的に格納するメモリ１４と、前記ＬＥＤ駆動回路１２によりＬＥＤ発光制御を行うと共に前記メモリ１４に格納した二次元画像情報を基に用紙６の走査領域における状態を判定する判定処理プログラムを含むＣＰＵ１５とから構成される。   As shown in FIG. 2, the paper state detection device is based on the two-dimensional sensor unit 1 described above, the LED drive circuit 12 that emits the LED 2 of the two-dimensional sensor unit 1, and the reflected light received by the sensor element 4. An image processing circuit 13 for performing image processing for generating two-dimensional image information, a memory 14 for temporarily storing the two-dimensional image information generated by the image processing circuit 13, and LED light emission control by the LED driving circuit 12. And a CPU 15 including a determination processing program for determining the state of the paper 6 in the scanning area based on the two-dimensional image information stored in the memory 14.

該ＣＰＵ１５は、前記一定周期毎に取得した二次元画像情報の時間経緯に伴う変化を比較することによって、図３（ｂ）のＸＹ方向の変位をカウント値として出力する機能を判定処理プログラムを有し、例えば、カウント値「１」を１／４００ｉｎｃｈ（０．０６３５ｍｍ／ｃｏｕｎｔ）としたとき、用紙のＸ方向（搬送方向と直角な横方向）のカウント値を「−１２８」〜「＋１２７」の範囲、用紙のＹ方向（搬送方向と直角な横方向）のカウント値を「−１２８」〜「＋１２７」の範囲で出力する様に構成されており、この技術は、近年の光学マウスの移動方向及び距離を詳細に検知する技術にも採用されている。   The CPU 15 has a determination processing program having a function of outputting the displacement in the XY directions in FIG. 3B as a count value by comparing changes with time of the two-dimensional image information acquired at regular intervals. For example, when the count value “1” is 1/400 inch (0.0635 mm / count), the count value in the X direction of the paper (the horizontal direction perpendicular to the transport direction) is “−128” to “+127”. Range, and the count value in the Y direction of the paper (lateral direction perpendicular to the transport direction) is output in the range of “−128” to “+127”. It is also used in the technology for detecting the distance in detail.

また、前記ＣＰＵ１５は、用紙の正常搬送時に一定周期毎に走査した二次元画像情報の変位量、具体的には用紙の移動方向及び移動量の範囲値を前記カウント値として記憶するメモリを含むものとする。   Further, the CPU 15 includes a memory for storing, as the count value, the displacement amount of the two-dimensional image information scanned at regular intervals during normal conveyance of the sheet, specifically, the movement direction of the sheet and the range value of the movement amount. .

［動作］
さて、前述のように構成した用紙状態検知装置は、図１における用紙搬送装置において用紙６を搬送したとき、搬送される用紙６表面の走査領域における二次元画像情報を一定周期にて取得し、この取得した二次元画像情報を比較することによって、前述したＸ方向の変位を示すＸ方向カウント値並びにＹ方向変位を示すＹ方向カウント値を出力する。 [Operation]
Now, when the paper state detection device configured as described above transports the paper 6 in the paper transport device in FIG. 1, it acquires the two-dimensional image information in the scanning region of the surface of the paper 6 being transported at a constant cycle, By comparing the acquired two-dimensional image information, the X-direction count value indicating the displacement in the X direction and the Y-direction count value indicating the Y-direction displacement are output.

このＸＹ方向カウント値は、用紙の搬送状態に応じて変化するものであって、このカウント値の推移を次に図５を参照して説明する。図５は、３枚の正常用紙と、１枚の左上角にステープラーを止めた用紙とを用紙縦方向に順次搬送した場合のＸＹ方向カウント値の推移を示すものであって、Ｘ方向カウント値は、正常用紙においては横幅方向には用紙ガイドにより移動しないため、図中の符号５０〜５２にて示す如く、略カウント値「−３≦Ｘ≦２」の範囲で推移し、これに対してＹ方向カウント値は、用紙が走査領域に達した領域において略台形状に上昇する様に推移する特性がある。   This XY direction count value changes in accordance with the sheet conveyance state, and the transition of the count value will be described with reference to FIG. FIG. 5 shows the transition of the X-direction count value when three normal sheets and one sheet with the stapler stopped at the upper left corner are sequentially conveyed in the vertical direction of the sheet. Since normal paper does not move in the horizontal width direction by the paper guide, as indicated by reference numerals 50 to 52 in the figure, it changes within a range of substantially count value “−3 ≦ X ≦ 2”. The Y-direction count value has a characteristic that changes so as to rise in a substantially trapezoidal shape in the area where the paper reaches the scanning area.

他方、左上角にステープラーを止めた用紙においては、図中の符号５３にて示す如く、用紙左上角が止められて用紙が搬送過程において変形することによって、Ｙ方向カウント値の台形状の推移が壊れると共に、Ｘ方向カウント値においても横方向にズレてＸカウント値がマイナス方向に変化して「Ｘ＜−３，Ｘ＞２」の範囲になる様に推移する。   On the other hand, in the paper with the stapler stopped at the upper left corner, as indicated by reference numeral 53 in the drawing, the upper left corner of the paper is stopped and the paper is deformed in the conveyance process, so that the trapezoidal transition of the count value in the Y direction is changed. In addition to being broken, the X-direction count value also shifts in the horizontal direction and the X-count value changes in the minus direction and changes so as to be in the range of “X <−3, X> 2.

この符号５３により示した状態のＸＹ方向カウント値は、図６（ａ）に拡大して示す如く、Ｙ方向ズレ変位６２が用紙変位状態に応じて台形状の上辺が上下に変化し、Ｘ方向ズレ変位６１が用紙変位状態に応じてマイナス方向に下降するように変化するように推移する。本実施形態においては、用紙の正常搬送におけるＸ方向カウント値が「−３≦Ｘ≦２」の範囲であり、異常搬送時（ジャム発生過程における搬送時）のＸ方向カウント値が「Ｘ＜−３，Ｘ＞２」となることが判る。   The XY direction count value in the state indicated by the reference numeral 53 indicates that the upper side of the trapezoidal shape changes up and down in accordance with the sheet displacement state as shown in FIG. The deviation displacement 61 changes so as to change in the minus direction in accordance with the sheet displacement state. In the present embodiment, the X direction count value in the normal conveyance of the paper is in the range of “−3 ≦ X ≦ 2,” and the X direction count value in the abnormal conveyance (during conveyance in the jam occurrence process) is “X <−”. 3, X> 2 ”.

本実施形態においては、Ｘ方向カウント値のみの異常値について説明したが、本発明はこれに限られるものではなく、Ｙ方向の異常値についても判定することができ、更には図３（ｂ）に示した用紙表面の凸凹を表す二次元画像情報を基に前記凹凸を三次元として算出することによって、用紙の厚み方向（Ｚ軸方向）の挙動をジャム発生の前兆として判定することができる。 In the present implementation embodiment has been described abnormal value in the X direction count value only, the present invention is not limited thereto, can also be determined for the abnormal value in the Y direction, and further FIG. 3 (b ), The behavior in the thickness direction (Z-axis direction) of the paper can be determined as a sign of the occurrence of jamming. .

本実施形態によるＣＰＵ１５は、図５及び図６（ａ）に示したＸ方向（用紙横方向）成分のみを図６（ｂ）の如く抽出する。このＸ方向成分の挙動は、前述したＸ方向カウント値が「Ｘ＜−３，Ｘ＞２」の条件を満たすとき、ジャムが発生したと判定する。   The CPU 15 according to the present embodiment extracts only the X direction (paper lateral direction) component shown in FIGS. 5 and 6A as shown in FIG. The behavior of the X-direction component is determined that a jam has occurred when the above-described X-direction count value satisfies the condition of “X <−3, X> 2”.

本実施形態による用紙状態検知装置を含む用紙搬送装置は、図４に示す如く、用紙６を搬送しながら二次元センサ部１が走査領域における走査光の照射並びに用紙からの反射光のスキャンを開始するステップＳ４１と、該走査領域における反射光を一定周期毎に取得するステップＳ４２と、該受光した反射光を基に画像処理回路１３が二次元画像情報を生成する画像処理を行うステップＳ４３と、ＣＰＵ１５が前記生成した二次元画像情報を一旦、メモリ１４に格納し、一定周期中の連続する２つの二次元画像情報を比較し、該両二次元画像情報の変位量を前述したカウント値として計数するステップＳ４４と、該ステッ
プＳ４４により計数したカウント値を基に用紙のズレ量（ＸＹ方向のカウント値）が所定値を超えるか否かを判定するステップＳ４５と、該ステップＳ４５において所定のズレ量を超えると判定したときにジャム検知としてローラの停止等のエラー処理を行うステップＳ４６と、前記ステップＳ４５において用紙ズレ量が所定値未満と判定したときに用紙の搬送が終了したか否かを判定し、終了していないと判定したときに前記ステップＳ４１に戻り、終了したと判定したときに処理を終了するステップＳ４７とを実行する。 As shown in FIG. 4, in the paper transport device including the paper state detection device according to the present embodiment, the two-dimensional sensor unit 1 starts scanning light irradiation and scanning of reflected light from the paper while transporting the paper 6. Step S41 for performing, Step S42 for acquiring the reflected light in the scanning region at regular intervals, Step S43 for performing image processing in which the image processing circuit 13 generates two-dimensional image information based on the received reflected light, The CPU 15 temporarily stores the generated two-dimensional image information in the memory 14, compares two consecutive two-dimensional image information in a fixed period, and counts the displacement amount of both the two-dimensional image information as the count value described above. Step S44 for determining whether or not the amount of sheet misalignment (count value in the XY direction) exceeds a predetermined value based on the count value counted in Step S44. S45, step S46 for performing error processing such as roller stop as jam detection when it is determined in step S45 that the predetermined deviation amount is exceeded, and in step S45, the sheet deviation amount is determined to be less than the predetermined value. It is determined whether or not the conveyance of the paper has been completed, and when it is determined that the conveyance has not been completed, the process returns to the step S41, and when it is determined that the conveyance has been completed, the process is terminated.

これら一連の処理によって本実施形態による用紙搬送装置は、搬送する用紙表面の状態を用紙状態検知装置が一定周期毎にスキャンし、このスキャンによって得られた連続する２つの二次元画像情報を比較することによって、用紙の移動方向及び移動量をカウント値として取得し、このカウント値が閾値を超えたときにジャムと判定することによって、ジャムの発生過程における用紙の挙動を検知し、用紙詰まり等のジャムの発生を防止することができる。   Through the series of processes, the sheet conveying apparatus according to the present embodiment causes the sheet state detecting apparatus to scan the condition of the sheet surface to be conveyed at regular intervals, and compares two consecutive two-dimensional image information obtained by this scanning. Thus, the paper movement direction and movement amount are acquired as count values, and when the count value exceeds a threshold value, it is determined that a jam has occurred. The occurrence of jam can be prevented.

本実施形態においては、被照射物に対して所定の傾斜角度（例えば、５度〜２０度）をもって光を照射し、この反射光を二次元画像情報として取得し、一定周期内で連続する２つの二次元画像情報のフレーム間の差異を、例えば二次元画像情報に含まれる凸部頂点又は凹部底部の縦横移動量として抽出し、この凸部頂点又は凹部底部の縦横移動量の変化を基に用紙表面状態のＸＹＺ方向の変化として抽出し、これら変化量が正常搬送時の所定変化量を超えると判定したときに、用紙搬送異常が発生したと判定することができる。 In the present embodiment, the irradiated object is irradiated with light at a predetermined inclination angle (for example, 5 degrees to 20 degrees), the reflected light is acquired as two-dimensional image information, and is continuously 2 within a certain period. The difference between two frames of two-dimensional image information is extracted, for example, as the amount of vertical and horizontal movement of the convex vertex or concave bottom included in the two-dimensional image information, and based on the change of the vertical and horizontal movement amount of this convex vertex or concave bottom extracted as a change in the XYZ direction of the paper surface conditions, when these change amount is determined to exceed the predetermined amount of change in the normal conveyance, it can be determined that the paper transport failure has occurred.

本発明による用紙状態検知方法及び用紙状態検知装置は、例えば、光学的文字読取装置、画像複写装置、印刷装置等の用紙を一枚ずつ搬送する搬送機構を有する装置や、紙幣を搬送する現金取扱装置その他に応用することができる。   The paper state detection method and the paper state detection device according to the present invention include, for example, an apparatus having a transport mechanism for transporting paper one by one, such as an optical character reading device, an image copying device, and a printing device, and a cash handling for transporting banknotes. It can be applied to devices and others.

本発明の一実施形態による用紙状態検知装置を説明するための図。The figure for demonstrating the paper state detection apparatus by one Embodiment of this invention. 本実施形態による用紙状態検知装置の回路構成を示す図。1 is a diagram illustrating a circuit configuration of a paper state detection device according to an embodiment. 本実施形態による立体センサの原理を説明するための図。The figure for demonstrating the principle of the three-dimensional sensor by this embodiment. 本実施形態による判定処理部の動作フロー図。The operation | movement flowchart of the determination process part by this embodiment. 本実施形態による立体センサの検知信号を説明するための図。The figure for demonstrating the detection signal of the three-dimensional sensor by this embodiment. 本実施形態によるステープラー検知時の検知信号を示す図。The figure which shows the detection signal at the time of stapler detection by this embodiment.

１：二次元センサ部、２：ＬＥＤ、３：レンズ、４：センサ素子、５：読取部、６：用紙、７：摩擦ローラ、８：送り出しローラ、１０：搬送ローラ、１２：ＬＥＤ駆動回路部、１３：画像処理回路、１４：メモリ、３０：読取フレームエリア
1: two-dimensional sensor unit, 2: LED, 3: lens, 4: sensor element, 5: reading unit, 6: paper, 7: friction roller, 8: delivery roller, 10: transport roller, 12: LED drive circuit unit , 13: image processing circuit, 14: memory, 30: reading frame area

Claims (6)

シート状の用紙の所定速度による搬送時の挙動を検知する用紙状態検知装置であって、
搬送される用紙表面の所定領域に用紙表面に対して斜め方向から光を照射する光源と、
該光源から照射され、前記用紙表面から反射した反射光を受光するレンズと、
該レンズから出射された反射光を一定周期毎の連続する二次元画像情報として受光する
二次元センサ素子と、
前記用紙を所定速度で正常搬送したときの前記反射光に基づく二次元センサ素子が受光した二次元画像情報の用紙厚み方向の変位許容範囲量を記憶するメモリとを備え、
前記制御部が、二次元センサ素子が受光した二次元画像情報を基に用紙表面の凹凸量を含む凹凸情報を抽出し、該抽出した凹凸情報が、連続する２つの二次元画像情報における凹凸量の変化量が前記メモリに記憶した用紙厚み方向の変位量範囲を超えたとき、用紙の異常搬送と判定する用紙状態検知装置。 A sheet state detection device that detects the behavior of a sheet-shaped sheet during conveyance at a predetermined speed,
A light source that irradiates light to a predetermined area of the paper surface to be conveyed from an oblique direction with respect to the paper surface;
A lens that receives the reflected light emitted from the light source and reflected from the paper surface;
A two-dimensional sensor element that receives reflected light emitted from the lens as continuous two-dimensional image information for each predetermined period;
A memory for storing a displacement allowable range amount in the sheet thickness direction of the two-dimensional image information received by the two-dimensional sensor element based on the reflected light when the sheet is normally conveyed at a predetermined speed;
The control unit extracts unevenness information including the unevenness amount of the paper surface based on the two-dimensional image information received by the two-dimensional sensor element, and the extracted unevenness information is the unevenness amount in two continuous two-dimensional image information. A sheet state detection device that determines that the sheet is abnormally conveyed when the amount of change exceeds a displacement amount range in the sheet thickness direction stored in the memory. 前記用紙表面に対して斜め方向から照射する照射角度が、用紙表面に対して５度〜２０度の所定の角度とした請求項１に記載の用紙状態検知装置。   The paper state detection device according to claim 1, wherein an irradiation angle applied to the paper surface from an oblique direction is a predetermined angle of 5 degrees to 20 degrees with respect to the paper surface. 前記制御部が、前記斜め方向から用紙に照射した反射光を二次元画像情報として取得し、一定周期内で連続する２つの二次元画像情報のフレーム間の差異を二次元画像情報に含まれる凸部頂点又は凹部底部の縦横移動量として抽出し、前記凸部頂点又は凹部底部の縦横移動量の変化を基に用紙表面状態のＸＹＺ方向の変化として抽出し、前記抽出した変化量が正常搬送時の所定変化量を超えると判定したときに、用紙搬送異常が発生したと判定する請求項２記載の用紙状態検知装置。   The control unit obtains reflected light applied to the sheet from the oblique direction as two-dimensional image information, and includes a difference between two frames of two-dimensional image information that is continuous within a fixed period included in the two-dimensional image information. This is extracted as the vertical and horizontal movement amount of the top part or the bottom part of the recess, and is extracted as the change in the XYZ direction of the paper surface state based on the change in the vertical and horizontal movement amount of the top part or the bottom part of the concave part. The paper state detection device according to claim 2, wherein it is determined that a paper conveyance abnormality has occurred when it is determined that the predetermined change amount is exceeded. 搬送されるシート状の用紙表面の所定領域に用紙表面に対して斜め方向から光を照射する光源と、該光源から照射され、前記用紙表面から反射した反射光を受光するレンズと、該レンズから出射された反射光を一定周期毎の連続する二次元画像情報として受光する二次元センサ素子と、前記用紙を所定速度で正常搬送したときの前記反射光に基づく二次元センサ素子が受光した二次元画像情報の用紙厚み方向の変位許容範囲量を記憶するメモリと、該メモリに記憶した正常許容範囲値及び前記二次元センサ素子により受光した反射光を基に用紙搬送時における挙動を検知する制御部を備える用紙状態検知装置の用紙検知状態検知方法であって、
前記制御部が、二次元センサ素子が受光した二次元画像情報を基に用紙表面の凹凸量を含む凹凸情報を抽出し、該抽出した凹凸情報が、連続する２つの二次元画像情報における凹凸量の変化量が前記メモリに記憶した用紙厚み方向の変位量範囲を超えたとき、用紙の異常搬送と判定する用紙状態検知方法。 A light source that irradiates light on a predetermined area of the sheet-like paper surface to be conveyed from an oblique direction with respect to the paper surface; a lens that receives reflected light that is irradiated from the light source and reflected from the paper surface; and A two-dimensional sensor element that receives the emitted reflected light as continuous two-dimensional image information at a constant period, and a two-dimensional sensor element that receives the two-dimensional sensor element based on the reflected light when the paper is normally conveyed at a predetermined speed. A memory for storing the amount of allowable displacement in the sheet thickness direction of image information, and a control unit for detecting the behavior during sheet conveyance based on the normal allowable range value stored in the memory and the reflected light received by the two-dimensional sensor element A paper detection state detection method for a paper state detection device comprising:
The control unit extracts unevenness information including the unevenness amount of the paper surface based on the two-dimensional image information received by the two-dimensional sensor element, and the extracted unevenness information is the unevenness amount in two continuous two-dimensional image information. A sheet state detection method for determining that the sheet is abnormally conveyed when the amount of change exceeds a displacement amount range in the sheet thickness direction stored in the memory. 前記光源が、用紙表面に対して５度〜２０度の所定の角度とした光を前記用紙表面に照射する請求項４に記載の用紙状態検知方法。 The paper state detection method according to claim 4 , wherein the light source irradiates the paper surface with light having a predetermined angle of 5 degrees to 20 degrees with respect to the paper surface. 前記制御部が、前記斜め方向から用紙に照射した反射光を二次元画像情報として取得し、一定周期内で連続する２つの二次元画像情報のフレーム間の差異を二次元画像情報に含まれる凸部頂点又は凹部底部の縦横移動量として抽出し、前記凸部頂点又は凹部底部の縦横移動量の変化を基に用紙表面状態のＸＹＺ方向の変化として抽出し、前記抽出した変化量が正常搬送時の所定変化量を超えると判定したときに、用紙搬送異常が発生したと判定する請求項５記載の用紙状態検知方法。   The control unit obtains reflected light applied to the sheet from the oblique direction as two-dimensional image information, and includes a difference between two frames of two-dimensional image information that is continuous within a fixed period included in the two-dimensional image information. This is extracted as the vertical and horizontal movement amount of the top part or the bottom part of the recess, and is extracted as the change in the XYZ direction of the paper surface state based on the change in the vertical and horizontal movement amount of the top part or the bottom part of the concave part. The paper state detection method according to claim 5, wherein it is determined that a paper conveyance abnormality has occurred when it is determined that the predetermined amount of change is exceeded.
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