JPH0557909B2 - - Google Patents
Info
- Publication number
- JPH0557909B2 JPH0557909B2 JP61010910A JP1091086A JPH0557909B2 JP H0557909 B2 JPH0557909 B2 JP H0557909B2 JP 61010910 A JP61010910 A JP 61010910A JP 1091086 A JP1091086 A JP 1091086A JP H0557909 B2 JPH0557909 B2 JP H0557909B2
- Authority
- JP
- Japan
- Prior art keywords
- density
- printed
- printed matter
- inspection
- detection sensor
- 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.)
- Expired - Fee Related
Links
- 238000007689 inspection Methods 0.000 claims description 39
- 238000001514 detection method Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 12
- 239000013307 optical fiber Substances 0.000 description 17
- 238000005259 measurement Methods 0.000 description 9
- 230000002159 abnormal effect Effects 0.000 description 7
- 238000005286 illumination Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000004080 punching Methods 0.000 description 6
- 230000005856 abnormality Effects 0.000 description 4
- 238000001739 density measurement Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
Landscapes
- Controlling Sheets Or Webs (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Description
【発明の詳細な説明】
(イ) 発明の目的
［産業上の利用分野］
この発明は枚葉印刷機または打抜機等において
上り面印刷または打抜きをする場合に、既印刷面
である初刷面の天地逆・裏白を検査するための天
地逆・裏白検査装置に関するものである。[Detailed Description of the Invention] (a) Purpose of the Invention [Field of Industrial Application] This invention provides a method for printing or punching the first printing surface, which is the already printed surface, when performing top side printing or punching in a sheet-fed printing machine or a punching machine. This invention relates to an upside-down/back-white inspection device for inspecting upside-down/back-white.
枚葉印刷機または打抜機等において、正しい上
り面印刷または打抜きを行うためには、枚葉体の
上り面を刷版に向けてかつ用紙の天地左右を正し
い向きで供給し、初刷面との所要の位置関係を保
つて印刷機または打抜機に供給する必要があり、
そのために、印刷機または打抜機に入る前の位置
において、供給された枚葉体の初刷面の天地逆・
裏白を検出する必要がある。 In order to perform correct top-side printing or punching on a sheet-fed printing machine or punching machine, it is necessary to feed the paper with the top side facing the printing plate and the top, bottom, right and left sides of the paper in the correct direction, and to match the first printing side. It is necessary to maintain the required positional relationship and feed it to the printing or punching machine.
For this purpose, the first printing surface of the supplied sheet is turned upside down and
It is necessary to detect Ura-white.
［従来の技術］
このような枚葉体の上り面の天地逆・裏白を検
出する場合に、従来は特公昭58−51825号公報に
示されるようにすべての枚葉体の指定箇所に検査
用のマークを印刷し、このマークをセンサで読み
取る方法が採られていた。[Prior art] When detecting the upside down or reverse white on the upper surface of such a sheet, conventionally, as shown in Japanese Patent Publication No. 58-51825, inspection tools were installed at specified locations on all sheets. The method used was to print a mark and read this mark with a sensor.
［発明が解決しようとする問題点］
しかるに、従来のこのような技術においては、
検査用マークを印刷するスペースを印刷物である
枚葉体の一部、例えば紙の端に準備する必要があ
り、印刷図柄を構成する際の制約になつており、
かつそのマークを印刷する手間を要し、また印刷
図柄が用紙面全体を覆い、マークを印刷するスペ
ースがないこともある。さらに、用紙サイズが変
ることによりマークの位置が移動することがあ
り、検出センサの位置移動の範囲をこえてしまい
検出できない場合がある。このようにマークを所
定の位置に製版・印刷することは用紙スペースを
節約する傾向が強いため、管理が困難であつて、
これらの問題点に関する対策技術の開発が望まれ
ている。[Problems to be solved by the invention] However, in such conventional technology,
It is necessary to prepare a space for printing the inspection mark on a part of the printed sheet, such as the edge of the paper, which is a constraint when configuring the printed design.
Moreover, it takes time and effort to print the mark, and the printed design may cover the entire surface of the paper, so there may not be enough space to print the mark. Furthermore, the position of the mark may shift due to a change in paper size, and the mark may be beyond the range of position movement of the detection sensor and cannot be detected. Making and printing marks in predetermined positions in this way tends to save paper space, making it difficult to manage.
It is desired to develop countermeasure techniques for these problems.
このようなことから、本件出願人は、先に新た
な天地逆・裏白検査装置を提案した（昭和60年特
許出願第192679号）。 For this reason, the present applicant previously proposed a new upside down/backside white inspection device (Patent Application No. 192679, filed in 1985).
この新たに提案された天地逆・裏白検査装置は
印刷物に検査用のマークを付することなく、前の
印刷工程で用紙に印刷された印刷図柄をそのもの
を検出用のマークとして利用する技術を確立した
もので、印刷物に検査用マークを印刷する必要が
なく、従つて印刷図柄を構成する際の制約となる
検査マーク用のスペースを設ける必要がなく、任
意の大きさの印刷物について適用することがで
き、天地逆・裏白の検査を確実に行うことがで
き、かつ構造が簡単で操作が確実であるという顕
著な効果を発揮するものであるが、ここで用いら
れる濃度検出用センサは重なつた色の濃度（明
暗）を一括検出して処理装置により判定する形で
検査を行つており、この場合、色相が異なつてい
ても濃度（明暗）が等しい場合には、良品として
処理してしまうことがあつた。また、前記濃度検
出用センサはレンズ、検出部、信号増幅回路など
が一体化されており、これを所定箇所に取付ける
ため、かなりのスペースを必要とする等の問題が
残つている。 This newly proposed upside-down/backside white inspection device has established a technology that uses the printed design printed on the paper in the previous printing process as a detection mark, without attaching inspection marks to the printed matter. This method eliminates the need to print inspection marks on printed materials, eliminates the need to provide space for inspection marks, which is a constraint when configuring printed designs, and can be applied to printed materials of any size. This device has the remarkable effect of being able to reliably perform upside-down and reverse-white inspections, as well as having a simple structure and reliable operation. However, the concentration detection sensor used here is Inspection is performed by detecting color density (lightness and darkness) all at once and making a judgment using a processing device. In this case, even if the hues are different, if the density (lightness and darkness) is the same, it is processed as a non-defective item. Something happened. Further, the concentration detection sensor has a lens, a detection section, a signal amplification circuit, etc. integrated, and since it is attached to a predetermined location, there are still problems such as requiring a considerable amount of space.
この発明は上記の如き事情に鑑みてなされたも
のであつて、印刷物に検査用マークを印刷する必
要がなく、従つて印刷図柄を構成する際の制約と
なる検査マーク用のスペースを設ける必要がな
く、任意の大きさの印刷物について適用すること
ができ、光フアイバを利用したR.G.B.センサに
より各色成分ごとに検出し、かつセンサ自体が小
型になるので天地逆・裏白の検査を確実に行うこ
とができ、かつ構造が簡単で操作の確実な天地
逆・裏白検査装置であつて、かつ検査精度及び検
査部位の選定における範囲が広く、また濃度検出
センサの設置スペースが小さくてよい天地逆・裏
白検査装置を提供することを目的とするものであ
る。 This invention was made in view of the above-mentioned circumstances, and it eliminates the need to print inspection marks on printed matter, and therefore eliminates the need to provide a space for inspection marks, which is a constraint when configuring printed designs. It can be applied to prints of any size, and since the RGB sensor using optical fiber detects each color component, and the sensor itself is small, it is possible to reliably inspect upside-down and reverse-white prints. This is an upside-down/back-white inspection device that has a simple structure and reliable operation, has a wide range of inspection accuracy and selection of inspection parts, and requires a small installation space for the concentration detection sensor. The purpose is to provide a device.
(ロ) 発明の構成
［問題を解決するための手段］
この目的に対応して、この発明の天地逆・裏白
検査装置は、枚葉印刷物が検査位置に供給された
ことを検出してタイミング信号を発生するタイミ
ング信号発生装置と、前記タイミング信号に同期
して動作し前記枚葉印刷物の正常送りにおいて、
前記枚葉印刷物の辺を基準とし、かつ前記枚葉印
刷物の既印刷面の天地が逆のときには濃度差を生
ずる指定位置にある前記絵柄の濃度を検出し比較
装置に入力する反射濃度検出センサと、前記印刷
物の有無を検出する印刷物検出センサと、前記印
刷物の前記濃度と直前に検査した他の前記印刷物
の前記濃度とを比較する比較装置と、及び前記比
較装置によつて比較した結果を表示する表示装置
とを備え、前記濃度検出センサは、光の各色成分
ごとの濃度を検出するR.G.B.センサを有し、前
記比較装置は前記各色成分ごとの前記比較をする
ように構成したことを特徴としている。(B) Structure of the Invention [Means for Solving the Problem] In response to this purpose, the upside-down/back-white inspection device of the present invention detects that a sheet-fed printed matter is supplied to an inspection position and generates a timing signal. a timing signal generating device that generates a timing signal; and a timing signal generator that operates in synchronization with the timing signal to normally feed the sheet-fed printed matter;
a reflective density detection sensor that detects the density of the pattern at a designated position that causes a density difference when the side of the sheet-fed printed matter is used as a reference and that the already printed surface of the sheet-fed printed matter is upside down, and inputs the detected density to a comparison device; , a printed matter detection sensor that detects the presence or absence of the printed matter; a comparison device that compares the density of the printed matter with the density of another printed matter inspected immediately before; and a display of the comparison result by the comparison device. and a display device, wherein the density detection sensor has an RGB sensor that detects the density of each color component of light, and the comparison device is configured to perform the comparison for each color component. There is.
以下、この発明の詳細を一実施例を示す図面に
ついて説明する。 Hereinafter, details of the present invention will be explained with reference to the drawings showing one embodiment.
第１図に示すように、検査装置１はタイミング
信号発生装置２、濃度検出センサ３、印刷物検出
センサ４、処理装置５及び表示装置６を備えてい
る。 As shown in FIG. 1, the inspection device 1 includes a timing signal generator 2, a density detection sensor 3, a printed matter detection sensor 4, a processing device 5, and a display device 6.
タイミング信号発生装置２は検査装置１が動作
するためのタイミング信号を発生するためのもの
で、機械の１回転に１回のタイミングがとれるよ
うな回転部に取付けたセンサ例えば近接スイツチ
またはリミツトスイツチと回転する検出体例えば
タイミング用カムとで構成され、センサ位置に回
転検出体が重なつた際にタイミング信号を発生
し、入出力部を介して処理装置に入力する。 The timing signal generator 2 is used to generate a timing signal for the operation of the inspection device 1, and is used to generate a timing signal for the operation of the inspection device 1.The timing signal generator 2 generates a timing signal for the operation of the inspection device 1, and is connected to a sensor attached to a rotating part that can achieve timing once per rotation of the machine, such as a proximity switch or a limit switch. When the rotation detecting body overlaps the sensor position, a timing signal is generated and inputted to the processing device via the input/output section.
濃度検出センサ３は、印刷物面の反射濃度を測
定することにより印刷物７を天地逆、または裏白
であるか否かを判定するためのもので、光フアイ
バ束２１、R.G.B.センサ２２及びセンサ用増幅
器２３を備えている。 The density detection sensor 3 is for determining whether the printed matter 7 is upside down or reversely white by measuring the reflection density of the surface of the printed matter, and includes an optical fiber bundle 21, an RGB sensor 22, and a sensor amplifier 23. It is equipped with
光フアイバ束２１は測光用光フアイバ２４と照
明用光フアイバ２５とを束ねたものである。測光
用光フアイバ２４及び照明用光フアイバ２５とは
共に一本若しくは複数本の光フアイバからなつて
いる。測光用光フアイバ２４は光導入端２６が検
査位置に対向して位置し光導出端２７がR.G.B.
センサ２２に達している。 The optical fiber bundle 21 is a bundle of photometric optical fibers 24 and illumination optical fibers 25. Both the photometric optical fiber 24 and the illumination optical fiber 25 are composed of one or more optical fibers. The photometric optical fiber 24 has a light introduction end 26 located opposite the inspection position, and a light output end 27 facing the RGB
It has reached the sensor 22.
照明用光フアイバ２５は光導出端２８が検査位
置１２に対向して位置し、光導入端３１が照明用
の光源３２に達しており、光源３２からの光を導
いて検査位置１２を照明する。 The illumination optical fiber 25 has a light guide end 28 located opposite the inspection position 12 and a light introduction end 31 that reaches a light source 32 for illumination, and guides light from the light source 32 to illuminate the inspection position 12. .
R.B.G.センサ２２は測光用光フアイバ２４の
光導出端２７から出た光を赤(R)、緑(G)、青(B)の各
色成分に分解し、各色成分ごとの濃度を検出して
電気信号に変換するものである。センサ用増幅器
２３はR.G.B.センサ２３から出力された電気信
号を増幅、かつ、その出力信号をAD変換器１６
を介して処理装置５に入力する。 The RBG sensor 22 separates the light emitted from the light output end 27 of the photometric optical fiber 24 into red (R), green (G), and blue (B) color components, detects the concentration of each color component, and generates electricity. It converts it into a signal. The sensor amplifier 23 amplifies the electrical signal output from the RGB sensor 23 and sends the output signal to the AD converter 16.
The data is input to the processing device 5 via.
印刷物検出センサ４は、印刷物の天地裏白検出
をする条件として、印刷物７が検出位置に来てい
るかどうかを検出するもので、検査位置１２の付
近に取付けて印刷物面からの反射光量を検出しセ
ンサの出力（ON）に必要な光量の場合は紙が有
るものとし、光量が少ない場合は紙が無いものと
し出力信号を出さない。但し、用紙面が特に反射
量の少ない場合はこの逆（紙有りでOFF）で使
用しても良い。 The printed matter detection sensor 4 detects whether the printed matter 7 is at the detection position as a condition for detecting the whiteness of the top and bottom of the printed matter.It is installed near the inspection position 12 and detects the amount of light reflected from the surface of the printed matter. If the amount of light is sufficient for the output (ON), it is assumed that there is paper, and if the amount of light is small, it is assumed that there is no paper and no output signal is output. However, if the paper surface has a particularly low amount of reflection, it may be used in the opposite direction (OFF when paper is present).
処理装置５は、前記各センサからの信号を入力
し、濃度検出センサから送られて来る印刷物の反
射濃度を前後の印刷物の反射濃度と比較する比較
装置と、前記比較装置によつて比較した結果が不
良となつた枚数の表示と測定値の表示をする表示
装置と、前記各センサから送られて来る信号によ
り、前記各装置機器の動作を制御する制御装置を
備えている。 The processing device 5 inputs the signals from each of the sensors and compares the reflection density of the printed matter sent from the density detection sensor with the reflection density of the preceding and succeeding printed matter, and compares the results of the comparison by the comparison device. The apparatus includes a display device that displays the number of defective sheets and a measured value, and a control device that controls the operation of each of the devices based on signals sent from each of the sensors.
［作用］
このように構成された検出装置１の作用は次の
通りである。[Function] The function of the detection device 1 configured as described above is as follows.
印刷機フイーダーの用紙スタツカーに集積して
いる集積物８の頂上から出た裏面印刷後の印刷物
はコンベア１１に送られて検査位置１２に達し、
前当て１３で停止し、天地の位置決めを行い、次
に横針で左右位置決めが行われ、印刷物が一時的
に停止する瞬間に合せてタイミング信号発生装置
２がタイミング信号を発生する。このタイミング
信号の発生している間、濃度検出センサ３によつ
て、印刷物７の裏面の反射濃度を計測し、その測
定値はＡ／Ｄ変換器１６でデジタル変換し、処理
装置５のメモリーに記憶される。 The printed matter after printing on the back side that comes out from the top of the stack 8 accumulated on the paper stacker of the printing machine feeder is sent to the conveyor 11 and reaches the inspection position 12.
The printing material is stopped by the front cover 13, and vertical positioning is performed, and then horizontal positioning is performed by the horizontal needle, and the timing signal generator 2 generates a timing signal in synchronization with the moment when the printed material temporarily stops. While this timing signal is being generated, the density detection sensor 3 measures the reflection density on the back surface of the printed matter 7, and the measured value is digitally converted by the A/D converter 16 and stored in the memory of the processing device 5. be remembered.
即ち、光源３２が発光し、その光が光導入端３
１から入つて照明用光フアイバ２５内を伝送さ
れ、光導出端２８から出て印刷物７を測定箇所を
照明する。測定箇所からの反射光は光導入端２６
から入つて測光用光フアイバ２４内を伝送され、
光導出端２７からR.G.B.センサ２２に入る。 That is, the light source 32 emits light, and the light is transmitted to the light introduction end 3.
1, the light is transmitted through the illumination optical fiber 25, and exits from the light output end 28 to illuminate the printed matter 7 at the measurement location. The reflected light from the measurement point is transmitted to the light introduction end 26.
and is transmitted through the photometric optical fiber 24,
The light enters the RGB sensor 22 from the light output end 27.
R.G.B.センサ２２では入力した光を色分解フ
イルタを使用して赤、緑、青の３成分に分解し、
それぞれの色成分の濃さの割合に応じて電気信号
に変換する。この電気信号はセンサ用増幅器２３
で増幅され、かつＡ／Ｄ変換器１６でデジタル変
換したのち、処理装置５に入力される。 The RGB sensor 22 uses a color separation filter to separate the input light into three components: red, green, and blue.
It converts into electrical signals according to the density ratio of each color component. This electrical signal is sent to the sensor amplifier 23.
After the signal is amplified by the A/D converter 16 and digitally converted by the A/D converter 16, the signal is input to the processing device 5.
また印刷物検出センサ４で印刷物の有無を検査
し、印刷物が無くなつた場合は、前記測定値との
比較を停止する。以上の測定値はプログラムに従
つて処理装置５で処理され、前記測定値に対し、
予め設定した所定の割合で異なる境界値をはずれ
た測定値が入力された場合は、表示装置６、警報
装置１７によつて警報を出力させ、かつその都度
不良枚数（リセツトまでに発生した異常測定値の
数）を表示装置６に表示する。測定値の良否判定
は連続または断続して流れる印刷物の測定値を１
枚目と次の印刷物で比較判定する。すなわち、基
本的には、常に新しい測定値に基準値を更新して
いき次に流れて来た印刷物の測定値と比較判定す
る方式をとつている。但し、設定境界値をこえた
異常値は判定後キヤンセルし異常発生前の測定値
を基準値として比較判定する。 Further, the presence or absence of printed matter is checked using the printed matter detection sensor 4, and if there is no printed matter left, the comparison with the measured value is stopped. The above measured values are processed by the processing device 5 according to the program, and the measured values are
When a measured value that deviates from a boundary value that differs at a predetermined rate is input, a warning is output by the display device 6 and alarm device 17, and the number of defective sheets (abnormal measurements that have occurred before reset) is output each time. number of values) is displayed on the display device 6. To judge the quality of measured values, measure the measured values of continuous or intermittent printed matter.
Compare and judge the first print and the next print. That is, basically, a method is used in which the reference value is constantly updated with new measured values and compared with the measured values of the next printed matter. However, an abnormal value that exceeds the set boundary value is canceled after the determination and is compared and determined using the measured value before the occurrence of the abnormality as a reference value.
判定の理論は次の通りである。 The theory of judgment is as follows.
印刷物を裏面側から見た斜視図である第３図に
示すように、印刷物７ａ，７ｂ，７ｃが連続して
流れて来たとして、＋印の部分がそれぞれの印刷
物７ａ，７ｂ，７ｃの同じ箇所の計測位置とす
る。 As shown in FIG. 3, which is a perspective view of the printed matter viewed from the back side, if printed matter 7a, 7b, and 7c come in succession, the + mark indicates the same part of each printed matter 7a, 7b, and 7c. This is the measurement position of the spot.
印刷物７ａと７ｃが正常とすると、印刷物７ｂ
は絵柄天地逆で流れ、計測位置は絵柄の異なる場
所になる。従つて、基準値である印刷物７ａの検
査位置での各色成分ごとの濃度測定値と比較して
印刷物７ｂの検査位置での各色成分ごとの濃度測
定値との差が設定境界値を越えて異常と判定さ
れ、これにより、絵柄の天地逆刷りや裏白を検査
することができる。即ち、天地逆に印刷物が流れ
てきた場合は、検査位置には正常に給紙された印
刷図柄と全く異なつた図柄がくるのでR.G.B.に
分解された各色成分の濃度測定値は大きく異な
り、設定境界値を越えた濃度値となり異常と判定
される。 If printed matter 7a and 7c are normal, printed matter 7b
flows with the picture upside down, and the measurement position is at a different location on the picture. Therefore, the difference between the density measurement value for each color component at the inspection position of the print 7b and the density measurement value for each color component at the inspection position of the print 7b, which is a reference value, exceeds the set boundary value and is abnormal. As a result, it is possible to inspect the upside-down printing of the pattern and the whiteness on the reverse side. In other words, if the printed material is flown upside down, the inspection position will receive a completely different printed pattern from the normally fed printed pattern, so the density measurement values of each color component separated into RGB will be greatly different, and the setting boundary will be different. The concentration value exceeds this value and is determined to be abnormal.
また、仮に印刷図柄は異なるが重なり合つた濃
度値が同じか、またはごく少量の差しか発生しな
いような図柄に対した場合には、各色成分の中の
１色だけでも設定境界値を越えた濃度値が検出さ
れれば異常と判定するように設定されているの
で、各色成分の内１色が異なれば異常と判定でき
る。 In addition, if the printed designs are different but the overlapping density values are the same or there is only a small difference, even one color among each color component may exceed the set boundary value. Since the setting is such that if a density value is detected, it is determined to be abnormal, it can be determined that there is an abnormality if one of the color components is different.
尚、裏白の場合は用紙面に印刷図柄が存在しな
いものを検出することになるので、当然、正常な
印刷図柄との濃度差は大きくなり、一層容易に判
定できる。 Note that in the case of back-white, since the paper is detected without any printed pattern on the paper surface, the difference in density from the normal printed pattern is naturally large, making it easier to judge.
更に、以上の判定を行う際に基準値は常に設定
境界値以内に入つている前提が必要である。すな
わち、仮に境界値をこえた異常値を基準値に更新
すると次の正常な濃度値に対して濃度差が大きい
ので異常と判定することになる。このような判定
の混乱による誤動作を防止するため、印刷物７ｂ
の濃度値は境界値をこえているので基準値として
更新することのないようにキヤンセルする。従つ
て印刷物７ｃの濃度は異常発生前の印刷物７ａの
濃度と比較されて正常と判定される。 Furthermore, when making the above determination, it is necessary to assume that the reference value is always within the set boundary value. That is, if an abnormal value that exceeds the boundary value is updated to the reference value, the density difference will be large compared to the next normal density value, so it will be determined to be abnormal. In order to prevent malfunctions due to such confusion in judgment, printed matter 7b
Since the density value exceeds the boundary value, it is canceled so that it is not updated as a reference value. Therefore, the density of the printed matter 7c is compared with the density of the printed matter 7a before the abnormality occurs and is determined to be normal.
このように比較、判定は赤、緑、青の各色成分
のそれぞれについて行われ、前記のように設定さ
れた境界値をこえた測定値が各色成分中、１色以
上発生した場合は異常として前記警報装置、表示
装置等を動作させる。 Comparisons and judgments are made for each of the red, green, and blue color components in this way, and if one or more of the color components has a measured value that exceeds the boundary value set as described above, it is considered an abnormality. Operate alarm devices, display devices, etc.
(ハ) 発明の効果
このようにこの発明の検査装置では印刷物７
ａ，７ｃの計測位置での測定値と、印刷物７ｂの
計測位置での測定値がプログラム中の設定境界値
より大きく異なる場所を事前に選択することによ
り、特定の検出用マークを必要としないで、既に
印刷されている絵柄を利用して絵柄の天地逆刷り
や裏白を検査できるので、印刷物に検査用マーク
を印刷する必要がなく、従つて印刷図柄を構成す
る際の制約となる検査マーク用のスペースを設け
る必要がなく、従つて、印刷物に占める印刷図柄
の割合が任意の大きさの印刷物について適用する
ことができ、天地逆・裏白の検査を確実に行うこ
とができ、かつ構造が簡単で操作の確実な天地
逆・裏白検査装置を得ることができる。(c) Effects of the invention As described above, the inspection device of this invention has the ability to
By selecting in advance a location where the measured values at the measurement positions a and 7c and the measurement value at the measurement position of the printed material 7b differ more than the set boundary value in the program, a specific detection mark is not required. Since it is possible to inspect the upside-down printing and reverse whiteness of the pattern by using the already printed pattern, there is no need to print inspection marks on the printed material, which is a constraint when configuring the printed pattern. Therefore, it can be applied to printed matter of any size in which the proportion of the printed design occupies the printed matter, it is possible to reliably inspect upside down and reverse white, and the structure is simple. With this, you can obtain a reliably operated upside-down/back-white inspection device.
しかも、この発明の装置では赤、緑、青の各色
成分ごとの濃度測定値を検査データとして検出、
比較及び判定を行うので、天地逆、裏白の識別能
力が顕著に向上する。 Moreover, the device of this invention detects the density measurement values for each color component of red, green, and blue as inspection data.
Since comparisons and judgments are made, the ability to distinguish between upside-down and upside-down situations is significantly improved.
また、印刷物が一時的に停止する瞬間にタイミ
ング信号を発生するように構成してあるので、印
刷機等の運転速度の変化による計測位置の変化に
伴う誤差を最小限に抑えることができる。 Further, since the timing signal is generated at the moment when the printed matter is temporarily stopped, it is possible to minimize errors caused by changes in the measurement position due to changes in the operating speed of the printing press or the like.
しかも、光フアイバを検出端及び伝送手段とし
て使用することにより、センサ検出端の小型化が
可能となり、濃度検出センサ取付位置を従来より
自由に選択することができる。 Furthermore, by using optical fibers as the detection end and the transmission means, the sensor detection end can be made smaller, and the mounting position of the concentration detection sensor can be selected more freely than before.
第１図はこの発明の一実施例に係わる検査装置
を示すブロツク図、第２図は検査装置におけるセ
ンサの配置関係を示す説明図、第３図は良否判定
の原理を示す下部から見た斜視説明図である。
１……検査装置 ２……タイミング信号発生装
置 ３……濃度検出センサ ４……印刷物検出セ
ンサ ５……処理装置 ６……表示装置 ７……
印刷物 ８……集積物 １１……コンベア １２
……検査位置 １３……前当て １６……Ａ／Ｄ
変換器 ２１……光フアイバ束 ２２……R.G.
B.センサ ２３……センサ用増幅器 ２４……
測光用光フアイバ ２５……照明用光フアイバ
２６……光導入端 ２７……光導出端 ２８……
光導出端 ３１……光導入端 ３２……光源。
Fig. 1 is a block diagram showing an inspection device according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing the arrangement of sensors in the inspection device, and Fig. 3 is a perspective view from the bottom showing the principle of pass/fail judgment. It is an explanatory diagram. 1... Inspection device 2... Timing signal generator 3... Concentration detection sensor 4... Printed matter detection sensor 5... Processing device 6... Display device 7...
Printed matter 8... Accumulation 11... Conveyor 12
...Inspection position 13...Front cover 16...A/D
Converter 21...Optical fiber bundle 22...RG
B. Sensor 23...Sensor amplifier 24...
Optical fiber for photometry 25... Optical fiber for illumination
26... Light introducing end 27... Light leading end 28...
Light leading end 31... Light introducing end 32... Light source.
Claims (1)
出してタイミング信号を発生するタイミング信号
発生装置と、前記タイミング信号に同期して動作
し前記枚葉印刷物の正常送りにおいて、前記枚葉
印刷物の辺を基準とし、かつ前記枚葉印刷物の既
印刷面の天地が逆のときには濃度差を生ずる指定
位置にある前記絵柄の濃度を検出し比較装置に入
力する反射濃度検出センサと、前記印刷物の有無
を検出する印刷物検出センサと、前記印刷物の前
記濃度と直前に検査した他の前記印刷物の前記濃
度とを比較する比較装置と、及び前記比較装置に
よつて比較した結果を表示する表示装置とを備
え、前記濃度検出センサは、光の各色成分ごとの
濃度を検出するR.G.B.センサを有し、前記比較
装置は前記各色成分ごとの前記比較をするように
構成したことを特徴とする天地逆・裏白検査装
置。1. A timing signal generator that detects that a sheet-fed printed product is supplied to an inspection position and generates a timing signal; a reflective density detection sensor that detects the density of the pattern at a specified position that uses the side as a reference and that causes a density difference when the already printed surface of the sheet-fed printed material is upside down and inputs it to a comparison device; and the presence or absence of the printed material. a printed matter detection sensor that detects the density of the printed material, a comparison device that compares the density of the printed material with the density of another printed material inspected immediately before, and a display device that displays the results of comparison by the comparison device. The above-mentioned density detection sensor has an RGB sensor that detects the density of each color component of light, and the comparison device is configured to perform the comparison for each color component. Inspection equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61010910A JPS62169652A (en) | 1986-01-21 | 1986-01-21 | Apparatus for inspecting top and bottom reverse/back whiteness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61010910A JPS62169652A (en) | 1986-01-21 | 1986-01-21 | Apparatus for inspecting top and bottom reverse/back whiteness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62169652A JPS62169652A (en) | 1987-07-25 |
| JPH0557909B2 true JPH0557909B2 (en) | 1993-08-25 |
Family
ID=11763437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61010910A Granted JPS62169652A (en) | 1986-01-21 | 1986-01-21 | Apparatus for inspecting top and bottom reverse/back whiteness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62169652A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2532923Y2 (en) * | 1988-03-26 | 1997-04-16 | 株式会社濱田印刷機製造所 | Defective paper discharge device of rotary printing press |
| FR2635590B1 (en) * | 1988-08-18 | 1991-12-20 | Kis Photo Ind | DEVICE FOR SEPARATING A BEAM OF WHITE LIGHT INTO A PLURALITY OF ELEMENTARY BEAMS OF DETERMINED COLOR |
| JPH0274348A (en) * | 1988-09-12 | 1990-03-14 | Toppan Printing Co Ltd | Inspecting apparatus for color-omission printing and reverse printing |
| JPH02128148A (en) * | 1988-11-07 | 1990-05-16 | Toppan Printing Co Ltd | Card printing inspecting device |
-
1986
- 1986-01-21 JP JP61010910A patent/JPS62169652A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62169652A (en) | 1987-07-25 |
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