JPS60177206A - Double sheet detector for sheet-fed rotary press - Google Patents
Double sheet detector for sheet-fed rotary pressInfo
- Publication number
- JPS60177206A JPS60177206A JP59032490A JP3249084A JPS60177206A JP S60177206 A JPS60177206 A JP S60177206A JP 59032490 A JP59032490 A JP 59032490A JP 3249084 A JP3249084 A JP 3249084A JP S60177206 A JPS60177206 A JP S60177206A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- sheet
- output
- amount
- transmitted
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
- B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
- B65H7/12—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to double feed or separation
- B65H7/125—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to double feed or separation sensing the double feed or separation without contacting the articles
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Controlling Sheets Or Webs (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、枚葉輪転印刷機において、2枚以上の用紙が
同時に供給されたことの検出に用いられる2枚差検出方
式に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a two-sheet difference detection method used in a sheet-fed rotary printing press to detect that two or more sheets of paper are fed simultaneously.
枚葉輪転印刷機においては、2枚以上の用紙が同時に供
給される2枚差を生じた場合、これを検出して印刷機の
運転を停止させるものとなっておシ、従来は、第1図乃
至第3図に原理を示す手段が一般的に採用されていた。In sheet-fed rotary printing presses, when two or more sheets of paper are fed at the same time and a two-sheet difference occurs, this is detected and the operation of the printing press is stopped. A method whose principle is shown in FIGS. 3 through 3 was generally adopted.
すなわち、第1図乃至第3図は、用紙の光線透過率αと
透過光の光景りとの関係を示しておシ、用紙が1枚の場
合は、直線AのとおりD=αの関係となるのに対し、用
紙が2枚の場合は、曲′線BのとおpD−αの関係とな
るため、光量りの変化に着目し、これの値に応じて2枚
差の検出を行なうものとなっている。That is, Figures 1 to 3 show the relationship between the light transmittance α of paper and the visibility of transmitted light.When there is only one sheet of paper, the relationship D=α as shown by straight line A. On the other hand, when there are two sheets of paper, the relationship is pD-α with curve B, so the method focuses on changes in the amount of light and detects the difference between the two sheets according to this value. It becomes.
たソし、第1図においては、用紙の厚さおよび質に応じ
て半固定的に設定される検知レベルLdを基準としてお
シ、これに基づいて2枚差の検出を行なっているため、
検知可能範囲DEがわずかであると共に、用紙の種類を
変更すれば、その都度検知レベルLdを調整しなければ
ならないうえ、経時的な条件変化に対応できない等の欠
点を生じている。However, in Fig. 1, the detection level Ld, which is semi-fixed according to the thickness and quality of the paper, is used as a reference, and the difference between two sheets is detected based on this.
The detectable range DE is small, the detection level Ld must be adjusted each time the type of paper is changed, and it is not possible to respond to changes in conditions over time.
また、第2図においては、前回までの透過光量に対し平
均化等の処理を行ない、これの結果を記憶のうえ検知レ
ベルLdを設定しており、第1図と比較すれば検知可能
範囲DEは大であるが、透過率αの100%に近い範囲
および0%に近い範囲に対しては、2枚差の検出が不可
能となる欠点を生じている。In addition, in Fig. 2, processing such as averaging is performed on the amount of transmitted light up to the previous time, and the detection level Ld is set after memorizing the results.Comparing with Fig. 1, the detectable range DE is large, but it has the disadvantage that it is impossible to detect the difference between two sheets in a range close to 100% and a range close to 0% of the transmittance α.
なお、第3図においては、前述と同様に記憶した値に対
して一定の比率によシ検知レベルLdを設定しており、
第2図よシも検知可能範囲DEが拡大されてはいるもの
\、なお、透過率αの100優に近い範囲では、2枚差
の検出が不可能となる欠点を生じている。In addition, in FIG. 3, the detection level Ld is set at a constant ratio to the stored value in the same way as described above.
Although the detectable range DE is expanded in FIG. 2, there is a drawback that it is impossible to detect the difference between two sheets in a range where the transmittance α is close to 100 or more.
この対策としては、本出願人の別途出願による「枚葉輪
転印刷機の2枚差検出方式」(特願昭57−21499
4)が提案されておplはソ0−100%の透過率にお
いて2枚差の検出を可能としているが、同方式において
は、演算器、比較器、減算値発生器等を必要とし、構成
が複雑となる欠点を生じている。As a countermeasure against this problem, a separate application filed by the present applicant entitled "Two-sheet difference detection method for sheet-fed rotary printing presses" (patent application No. 57-21499) is available.
4) has been proposed, and the PL can detect the difference between two sheets at a transmittance of 0-100%, but this method requires an arithmetic unit, a comparator, a subtraction value generator, etc., and the configuration is The disadvantage is that it becomes complicated.
本発明は、従来のか\る欠点を根本的に排除する目的を
有し、1枚の用紙を透過した透過光の光量と2枚の用紙
を透過した透過光の光量とのはソウ間の値を示す中間値
と前記1枚の用紙を透過した透過光の光量との差を示す
値を減算値または基準値として格納したメモリと、用紙
を透過した透過光の光量をディジタル信号へ変換するア
ナログ・ディジタル変換器と、該変換器の出力に応じて
メモリから読み出した値およびアナログ・ディジタル変
換器の出力にしたがう値を用いて所定の演算および比較
を行なうプロセッサとを設け、簡単な構成によシ目的を
達するものとした極めて効果的な、枚葉輪転印刷機の2
枚差検出方式を提供するものである。The purpose of the present invention is to fundamentally eliminate the drawbacks of the conventional technology, and the amount of transmitted light transmitted through one sheet of paper and the amount of transmitted light transmitted through two sheets of paper are between two values. A memory that stores a value indicating the difference between the intermediate value indicating the value of - Provides a digital converter and a processor that performs predetermined calculations and comparisons using the value read from the memory according to the output of the converter and the value according to the output of the analog-to-digital converter, and has a simple configuration. 2 highly effective sheet-fed rotary printing presses that achieve this purpose.
This provides a sheet difference detection method.
以下、実施例を示す図によって本発明の詳細な説明する
が、まず、本発明の詳細な説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to figures showing examples, but first a detailed description of the present invention will be given.
第4図は、第1図乃至第3図と同様の図であるが、1枚
の用紙を透過した透過光の光量りを示す直線Aと、2枚
の用紙を透過した透過光の光量Dα−α2
を示す曲線Bとの中間の値、D=α−一、−を示す曲線
上に中間値Mを定めたうえ、直線Aの値と中間値Mとの
差を示す減算値りを定めておシ、実際の用紙を透過した
透過光の光量りから減算値りをを減算して基準値Mをめ
、これを検知レベルLdとして用いるものとなっている
。FIG. 4 is a diagram similar to FIGS. 1 to 3, but shows a straight line A indicating the amount of transmitted light transmitted through one sheet of paper, and a light amount Dα of transmitted light transmitted through two sheets of paper. An intermediate value M is determined between the curve B indicating -α2 and the curve indicating D=α-1, -, and a subtraction value indicating the difference between the value of the straight line A and the intermediate value M is determined. Then, the reference value M is determined by subtracting the subtraction value from the amount of light transmitted through the actual paper, and this is used as the detection level Ld.
したがって、直前の用紙を透過した透過光の光量Dnに
応じて減算値Lnを設定しておき、Dn−Ln:Mnの
演算によシ、逐次基準値Mnをめ、これと現在の用紙を
透過した透過光の光量Dn+1とを比較し、Mn≧Dn
+1の条件となったことを判断すれば検知可能範囲DE
が透過率αのほぼ0%〜100%tで拡大される。Therefore, the subtraction value Ln is set according to the amount of transmitted light Dn that has passed through the previous paper, and the reference value Mn is sequentially determined by calculating Dn-Ln:Mn. The amount of transmitted light Dn+1 is compared with Mn≧Dn
If it is determined that the +1 condition has been met, the detectable range DE
is expanded by approximately 0% to 100%t of the transmittance α.
また、光量Dnに応じて設定した減算値Lnを基準値と
したうえ、光量Dnと現在の用紙と対応する光量Dn+
1との差SをDn Dn+1 = S の演算によ請求
め、基準値LnとSとを比較し、S≧Lnの条件となっ
たことを判断してもはy同様の結果が得られる。In addition, the subtraction value Ln set according to the light amount Dn is used as a reference value, and the light amount Dn+ corresponding to the current paper is calculated.
Even if the difference S from 1 is calculated by calculating Dn Dn+1 = S, the reference value Ln and S are compared, and it is determined that the condition of S≧Ln is satisfied, the same result as y can be obtained.
たyし、点線によ)示すとおシ、透過率αの範囲に応じ
て中間値Mを直線によシ近似するものとしてもほぼ同様
の結果が得られる。However, as shown by the dotted line), almost the same result can be obtained even if the intermediate value M is approximated by a straight line depending on the range of the transmittance α.
また、第5図に透過率αの低い範囲を拡大して示すとお
り、透過率αの低い用紙では、2枚差の場合、用紙相互
間の間隙における光線反射により、理論値による曲線B
よシも実測値による曲線Brが低い値を示すため、透過
率αの低い用紙では、基準値MをMrへ変更し、これに
応じて減算値まだは基準値りを定めることが好ましい。In addition, as shown in Fig. 5, which shows an enlarged view of the range of low transmittance α, for paper with low transmittance α, when there is a difference between two sheets, the curve B based on the theoretical value is
Since the curve Br based on the actually measured values shows a low value, it is preferable to change the reference value M to Mr for paper with a low transmittance α, and set the subtraction value and the reference value accordingly.
なお、同図において、Ad、Md、Bd等は、ディジタ
ル変換により量子化した場合の変化状況を示している。In addition, in the same figure, Ad, Md, Bd, etc. show changes when quantized by digital conversion.
第6図以降は、以上の原理に基づ〈実施例を示し、第6
図は機械的構成図であり、給紙台1から送出された用紙
2は差板3上へ給送され、スイング爪4によシ頭部が捕
捉されてゴム胴5と圧胴6との間へ供給されたうえ、版
胴7からゴム胴5へ転写された絵柄の印刷を受けるもの
となっているが、差板3の先端部近傍には透孔3aが穿
設されており、差板3の下面側に設けた投光器LGの発
光が用紙2を透過し、受光器LRによシ受光され、電気
信号へ変換されるものとなっている。From FIG. 6 onwards, examples will be shown based on the above principle.
The figure is a mechanical configuration diagram, in which the paper 2 sent out from the paper feed tray 1 is fed onto the difference plate 3, the head of the paper is captured by the swing claw 4, and the paper 2 is moved between the blanket cylinder 5 and the impression cylinder 6. A through hole 3a is bored in the vicinity of the tip of the difference plate 3. Light emitted from a light emitter LG provided on the lower surface of the plate 3 is transmitted through the paper 2, is received by a light receiver LR, and is converted into an electrical signal.
また、圧胴6には図上省略した突起等の駆動体が設けて
あυ、これと対設置〜た近接スイッチ等の検出器TDに
より圧胴6の回転を検出し、印刷機の回転と同期したパ
ルス信号を得ている。In addition, the impression cylinder 6 is provided with a driving body such as a protrusion (not shown in the figure), and the rotation of the impression cylinder 6 is detected by a detector TD such as a proximity switch installed opposite to this, and the rotation of the printing press is detected. A synchronized pulse signal is obtained.
第7図は、電気的構成を示すブロック図であり、光源用
電源LPSによシ投光器LGを点灯する一方、受光器L
Rの出力は処理部PR8へ与えられており、こ\におい
て透過光の光量を示すディジタル信号へ変換されたうえ
、インターフェイスI/FおよびデータバスDBを介し
、マイクロプロセッサ等のプロセッサCPUへ与えられ
る。FIG. 7 is a block diagram showing the electrical configuration, in which the light emitter LG is lit by the light source power source LPS, while the light receiver L
The output of R is given to a processing unit PR8, where it is converted into a digital signal indicating the amount of transmitted light, and then given to a processor CPU such as a microprocessor via an interface I/F and a data bus DB. .
一方、シュミット・トリガ回路等を用いた紙検出回路P
Dにも受光器LRの出力が与えられておシ、この出力が
所定レベル以下となったときに紙検出回路PDが出力を
生じ、これをインターフェイスI/Fへ与えると共に、
検出器TDの出力に基づいてタイミング信号発生器TS
Gが発生したタイミング信号もインターフェイスI/F
へ与えられておシ、両者の一致によシプロセッサCP
Uが応動し、所定の演算および比較動作を行ない、これ
の結果に応じ、インターフェイスI/F およびドライ
バ等の出力回路OCを介して2枚差の検出々力Doを送
出するものとなっている。On the other hand, a paper detection circuit P using a Schmitt trigger circuit etc.
The output of the light receiver LR is also given to D, and when this output becomes below a predetermined level, the paper detection circuit PD generates an output, which is given to the interface I/F, and
Timing signal generator TS based on the output of detector TD
The timing signal generated by G is also connected to the interface I/F.
If given to processor CP, the agreement between the processor CP
U responds, performs predetermined arithmetic and comparison operations, and according to the results, outputs the detection force Do of the difference between the two sheets through the interface I/F and output circuit OC such as a driver. .
なお、プロセッサC’PUは、 データバスDB。Note that the processor C'PU is a data bus DB.
アドレスバスAB、およびコントロールパスCBを介し
て接続された固定メモリROM中の命令を実行し、必要
とするデータを同様に接続された可変メモリ RAMに
対しアクセスしながら各種の動作を行なっておシ、処理
部PR3の動作タイミングを規正する一方、用紙2の種
類に応じて操作される切替スイッチSWの出力にしたが
い、光源用電源LPSを制御し、光源LGの発光光度を
可変すると共に、判断および制御上の所定範囲を定めて
いる。The system executes instructions in the fixed memory ROM connected via the address bus AB and control path CB, and performs various operations while accessing the required data to the similarly connected variable memory RAM. , regulates the operation timing of the processing unit PR3, controls the light source power supply LPS according to the output of the changeover switch SW operated according to the type of paper 2, varies the luminous intensity of the light source LG, and performs judgment and A predetermined range of control is established.
第8図は、処理部PR8の詳細を示すブロック図であり
、受光器LRの出力は、p波器FILによシ雑音成分が
除去されてから、増幅器AMPによシ所定レベルまで増
幅され、積分回路等を用いた平均化回路AVRによシ平
均化されたうえ、アナログ・ディジタル変換器(以下、
ADC)A/Dによシ、インターフェイスI/F を介
するプロセッサCPUからの制御信号に応じてディジタ
ル信号へ変換されるものとなっている。FIG. 8 is a block diagram showing details of the processing unit PR8, in which the output of the photodetector LR is amplified to a predetermined level by the amplifier AMP after the noise component is removed by the p-wave generator FIL. It is averaged by an averaging circuit AVR using an integrating circuit, etc., and then an analog-to-digital converter (hereinafter referred to as
A/D (ADC) is converted into a digital signal in response to a control signal from the processor CPU via an interface I/F.
このほか、可変メモIJRAMには、光量りに応じた減
算値または基準値りが格納されておム切替スイッチSW
の出力によりアドレス番号の上位ビットを指定してLの
範囲を定めると共に、ADC・A/Dの出力によυアド
レス番号の下位ビットを指定するものとしてプロセッサ
CPUがLの読み出しを行ない、これを比較または演算
に用いるものとなっている。In addition, the variable memory IJRAM stores subtraction values or reference values depending on the amount of light.
The output of the ADC/A/D specifies the upper bits of the address number to determine the range of L, and the output of the ADC/A/D specifies the lower bits of the υ address number, and the processor CPU reads L. It is used for comparison or calculation.
第9図は、第1発明と対応するプロセッサCPUの動作
状況を示すフローチャートであJ) %初期設定N10
1によシイニシャライズを行なったうえ、紙検出回路P
Dによるゝゝ紙有py 〃102の判断、および、タイ
ミング信号によシ示されるゝ検出タイミング?”103
の判断がY(YES)となれば、蟻DO出力可〃104
によp検出々力Doの送出準備が行なわれたうえ、’
ADC動作〃105を行々わせることによシ用紙2を透
過した透過光の光量Dnが処理部PR8から送出され、
用紙2がN1枚目? 〃ineのYであれば、可変メモ
IJ RAMからの読出しによ、!71減算値発生〃1
0γがなされ、これに基づいて光量Dnと減算値Lnと
によりDn−Ln=Mnの代演N#108が行なわれる
と共に、切替スイッチSWの出力に応じて基準値Mnが
所定範囲か否かの判断が行なわれ、所定範囲内であれば
1記憶可? ”109がYとなシ、1演算〃108の結
果によって示される基準値Mnが可変メモリRAMの所
定エリアへ格納され、1記憶〃110がなされてから、
ステップ103以降を反復する。FIG. 9 is a flowchart showing the operating status of the processor CPU corresponding to the first invention.J) % initial setting N10
1, and then the paper detection circuit P.
Judgment of ゝゝPaper existence py〃102 by D and ゝDetection timing?? indicated by the timing signal? ”103
If the judgment is Y (YES), ant DO output is possible〃104
In addition to preparations for sending out the power of detection power Do,
By carrying out the ADC operation 105, the amount of transmitted light Dn transmitted through the sheet 2 is sent out from the processing unit PR8,
Is paper 2 the N1th sheet? If it is Y of ``ine'', read from the variable memory IJ RAM! 71 subtraction value generation〃1
0γ is performed, and based on this, a substitution N#108 of Dn-Ln=Mn is performed using the light amount Dn and the subtraction value Ln, and it is determined whether the reference value Mn is within a predetermined range or not according to the output of the changeover switch SW. If a judgment is made and it is within a predetermined range, can one be memorized? ``109 is not Y, the reference value Mn indicated by the result of 1 operation 108 is stored in a predetermined area of the variable memory RAM, 1 storage 110 is performed,
Step 103 and subsequent steps are repeated.
また、用紙2が2枚目以降であれば 11枚目? ’1
06がN(No)となり、前述と同様に戦域算値発生〃
121がなされ、このときには、プロセッサCPUへ光
i D n + 1 と減算値Ln+1とが与えられる
だめ、1演算1122の結果としては基準値Mn+1を
示す出力が生じ、’ Mn≧Dn+1? ”123がN
であれば一記憶可? 〃109のYを経た後の1記憶1
110によシ、可変メモリRAMの所定エリアへ内容更
新のうえ新らたな基準値MH+1が記憶される〇たソし
、これに先立ち、光景Dn+1と可変メモリRAMから
読み出した基準値MnとがプロセッサCPUへ与えられ
るため、’ Mn″2Dn+1? ’ 123の比較が
なされ、とれの結果がYであれば、検出出力1DO送出
〃124を行ない、ステップ103へ戻る。Also, if paper 2 is the second or subsequent sheet, is it the 11th sheet? '1
06 becomes N (No), and the battlefield calculation value is generated in the same way as above.
121 is performed, and at this time, since the light i D n + 1 and the subtraction value Ln+1 are given to the processor CPU, the result of one operation 1122 is an output indicating the reference value Mn+1, and 'Mn≧Dn+1? “123 is N
If so, can you remember it? 〃1 memory 1 after going through 109 Y's
At 110, the content is updated and a new reference value MH+1 is stored in a predetermined area of the variable memory RAM. Prior to this, the scene Dn+1 and the reference value Mn read from the variable memory RAM are In order to be applied to the processor CPU, a comparison of 'Mn''2Dn+1?' 123 is made, and if the result is Y, the detection output 1DO is sent 124 and the process returns to step 103.
また、弔紙有り?//102および東検出タイミング?
’103のNでは、′tI″)0出力不可”131,
132によシ検出々力DOの送出禁止が行なわれ、不要
な信号の送出が阻止されるものとなっている。Also, is there condolence paper available? //102 and east detection timing?
For N of '103, 'tI'') 0 output not possible''131,
132, the transmission of the detection power DO is prohibited, thereby preventing the transmission of unnecessary signals.
したがって、以上の動作を反復することによυ、用紙2
を透過した透過光の光量Dnに応じて自動的に逐次最適
な基準値Mnが定められ、これに基づいて現在の光景D
n+1が2枚差を示すか否かの判断が行なわれるものと
なシ、第4図に示す結果が実現する。Therefore, by repeating the above operations, υ, paper 2
The optimum reference value Mn is automatically and sequentially determined according to the amount of transmitted light Dn that has passed through the
If it is determined whether or not n+1 indicates a difference between two sheets, the result shown in FIG. 4 is realized.
第10図は、第2発明と対応するプロセッサCPUの動
作状況を示すフローチャートであシ、1初期設定〃20
1によシイニシャライズを行なったうえ、紙検出回路P
Dによる一紙有シ? “202の判断、および、タイミ
ング信号により示される協検出タイミング? “203
の判断がy (ygs)となれば、’Do出力可〃20
4により検出々力Doの送出準備が行なわれたうえ、’
ADC動作〃205を行なわせることにより用紙2を
透過した透過光の光量Dnが処理部PR8から送出され
、用紙2が一1枚目?”206のYであれば、切替スイ
ッチSWの出力に応じ光量Dnが所定範囲か否かの判断
が行なわれ、所定範囲内であればゝ記憶可?〃20γが
Yとなり、光量Dnが可変メモ+7RAMの所定エリア
へ格納されN記憶〃208がなされ、これの値に応する
可変メモリRAMからの基準値Lnの読み出しによシ皐
基準値発生〃209が行なわれ、ステップ203以降を
反復する。FIG. 10 is a flowchart showing the operating status of the processor CPU corresponding to the second invention.
1, and then the paper detection circuit P.
Is there a paper by D? “Judgment in 202 and cooperation detection timing indicated by timing signal?” 203
If the judgment is y (ygs), 'Do output is possible〃20
4, preparations for sending out the detection force Do were made, and '
By performing the ADC operation 205, the amount of transmitted light Dn transmitted through the paper 2 is sent out from the processing unit PR8, and whether the paper 2 is the 11th sheet? ``If it is Y in 206, it is determined whether the light amount Dn is within a predetermined range according to the output of the changeover switch SW, and if it is within the predetermined range, can it be stored?〃20γ is Y, and the light amount Dn is a variable memory. The reference value Ln is stored in a predetermined area of +7 RAM and N storage 208 is performed, and a reference value generation 209 is performed by reading out the reference value Ln corresponding to this value from the variable memory RAM, and steps 203 and subsequent steps are repeated.
また、用紙2が2枚目以降であれば、蟻1枚目? ’2
06がN(No)となシ、このときには、プロセッサC
PUへ光量Dn+1が与えられるため、可変メモlJl
’tAMの所定エリアから読み出した光量Dnとにより
Dn−Dn41=Sの蓼演算“221を行なってから、
@ S>Ln?” 222の比較がなされ、これの結果
がYであれば、検出出力”Do送出〃を行すい、ステッ
プ203へ戻ル。Also, if paper 2 is the second or later sheet, is it the first sheet? '2
06 is N (No), in this case, the processor C
Since the amount of light Dn+1 is given to the PU, the variable memory lJl
After performing the calculation "221" of Dn-Dn41=S using the light amount Dn read from the predetermined area of 'tAM,
@S>Ln? " 222 is compared, and if the result is Y, perform the detection output "Do Send" and return to step 203.
以上に対し、ステップ222がNであれば、ステップ2
07へ移行し、1記憶可?〃207のYを前提としてD
n+1の気記憶〃208および、これに応する気基準値
発生〃209がなされ、これらが更新される。Regarding the above, if step 222 is N, step 2
Is it possible to move to 07 and memorize 1? 〃D assuming Y of 207
An n+1 Qi memory 208 and a corresponding Qi reference value generation 209 are performed and updated.
また、1紙有!+?”202および“検出タイミング?
#203のNでは、町)0出力不可”231.232に
より検出々力DOの送出禁止が行なわれ、不要な信号の
送出が阻止されるものとなっている。Also, there is one paper! +? "202 and" detection timing?
In #203, N, transmission of the detection power DO is prohibited by "0 output disabled" 231 and 232, and unnecessary signals are prevented from being transmitted.
したがって、以上の動作を反復することによυ、用紙2
を透過した透過光の光量Dnに応じて自動的に逐次最適
な基準値りが定められ、これに基づいて現在の光量Dn
+1が2枚差を示すか否かの判断が行なわれるものとな
シ、第4図に示す結果が実現する。Therefore, by repeating the above operations, υ, paper 2
The optimum reference value is automatically determined one after another according to the amount of transmitted light Dn that has passed through the
If a judgment is made as to whether or not +1 indicates a two-sheet difference, the result shown in FIG. 4 is realized.
たyし、検出器TDとしてロークリエンコーダ等を用い
てもよく、減算値または基準値りの格納を固定メモリR
OMへ行なっても同様であシ、演算に代え、いずれかの
メモリへ演算結果のテーブルを格納しておき、これの読
み出しを行なってもよいと共に、紙検出回路PDおよび
タイミング信号発生器TSGの機能をプロセッサCPU
が備えるものとしてもよい等、本発明は種々の変形が自
在である。However, a low encoder or the like may be used as the detector TD, and the subtraction value or reference value may be stored in the fixed memory R.
The same applies to the OM. Instead of calculation, a table of calculation results may be stored in one of the memories and read out, and the paper detection circuit PD and timing signal generator TSG Function of processor CPU
The present invention can be modified in various ways, such as being equipped with the following.
以上の説明によシ明らかなとおシ本発明によれば、簡単
な構成によシ、自動的に最適な基準値が定められ、用紙
の光線透過率変化による影響、および経時的な諸条件の
変化による影響が排除され、常に確実な2枚差の検出が
行なわれるものとなシ、各種の枚葉輪転印刷機において
顕著な効果が得られる。As is clear from the above explanation, according to the present invention, an optimal reference value is automatically determined by a simple configuration, and the influence of light transmittance changes of paper and various conditions over time are If the influence of changes is eliminated and the difference between two sheets is always detected reliably, remarkable effects can be obtained in various sheet-fed rotary printing presses.
第1図乃至第3図は従来例の原理を示す図、第4図およ
び第5図は本発明の原理を示す図、第6図以降は本発明
の実施例を示し、第6図は機械的構成図、第7図は電気
的構成を示すブロック図、第8図は処理部の詳細を示す
ブロック図、第9図は第1発明と対応するプロセッサ、
ア動作状況を示す70−チャート、第10図は第2発明
と対応するプロセッサの動作状況を示すレローチャート
である・ 1′
2・拳・骨用紙、3a@・・・透孔、■、G・・・・投
光器、LR・・・・受光器、 PH1・・・・処理部、
CPU −−−−プロセッサ、 ROM−・―・固定
メモリ、RAM・・・e可変メモリ、A/I) ・・−
−ADC(アナログ・ディジタル変換器)。
特許出願人 小森印刷機械株式会社
代理人 山川政樹(tジ)2名)
第1図
−d(’/6]
栢2図
/
−〆L’/、J
第3図
第4図
第5図
第6図Figures 1 to 3 are diagrams showing the principle of the conventional example, Figures 4 and 5 are diagrams showing the principle of the present invention, Figures 6 and after show examples of the present invention, and Figure 6 is a machine 7 is a block diagram showing the electrical configuration, FIG. 8 is a block diagram showing details of the processing section, FIG. 9 is a processor corresponding to the first invention,
Figure 10 is a Lelow chart showing the operating status of the processor corresponding to the second invention. G: Emitter, LR: Receiver, PH1: Processing section,
CPU --- Processor, ROM ---Fixed memory, RAM...e variable memory, A/I) ---
-ADC (Analog to Digital Converter). Patent applicant Komori Printing Machinery Co., Ltd. Agent Masaki Yamakawa (tji) 2 people) Figure 1-d ('/6) Figure 2/-〆L'/, J Figure 3 Figure 4 Figure 5 Figure 6
Claims (2)
を透過した透過光の光量とのはソウ間の値を示す中間値
と前記1枚の用紙を透過した透過光の光量との差を示す
減算値を格納したメモリと、用紙を透過した透過光の光
量をディジタル信号へ変換するアナログ・ディジタル変
換器と、該アナログ・ディジタル変換器の出力に応じて
前記メモリから読み出した減算値を前記用紙を透過した
透過光の光量から減算して基準値をめ該基準値と現在の
用紙を透過した透過光の光量とを比較して前記用紙の2
枚差を検出するプロセッサとを備えたことを特徴とする
枚葉輪転印刷機の2枚差検出装置。(1) The amount of transmitted light transmitted through one sheet of paper and the amount of transmitted light transmitted through two sheets of paper are the intermediate value indicating the value between the two and the amount of transmitted light transmitted through one sheet of paper. an analog-to-digital converter for converting the amount of transmitted light transmitted through the paper into a digital signal; A reference value is obtained by subtracting the subtraction value from the amount of transmitted light that has passed through the paper, and the standard value is compared with the amount of transmitted light that has passed through the current paper.
A two-sheet difference detection device for a sheet-fed rotary printing press, comprising a processor for detecting a sheet difference.
紙を透過した透過光の光量とのはソウ間の値を示す中間
値と前記1枚の用紙を透過した透過光の光量との差を示
す基準値を格納したメモリと、用紙を透過した透過光の
光量をディジタル信号へ変換するアナログ・ディジタル
変換器と、該アナログ・ディジタル変換器の出力によっ
て示される直前の用紙を透過した透過光の光量と現在の
用紙を透過した透過光の光量との差を演算しかつ該差の
値と前記アナログ・ディジタル変換器の出力に応じて前
記メモリから読み出した基準値とを比較して前記用紙の
2枚差を検出するプロセッサとを備えたことを特徴とす
る枚葉輪転印刷機の2枚差検出装置。(2) The amount of transmitted light transmitted through one sheet of paper and the amount of transmitted light transmitted through two sheets of paper are the same as the intermediate value indicating the value between the amount of transmitted light transmitted through one sheet of paper. a memory that stores a reference value indicating the difference between the calculates the difference between the amount of transmitted light transmitted through the paper and the amount of transmitted light transmitted through the current sheet, and compares the value of the difference with a reference value read from the memory according to the output of the analog-to-digital converter. A two-sheet difference detection device for a sheet-fed rotary printing press, comprising: a processor for detecting a difference between two sheets of paper.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59032490A JPS60177206A (en) | 1984-02-24 | 1984-02-24 | Double sheet detector for sheet-fed rotary press |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59032490A JPS60177206A (en) | 1984-02-24 | 1984-02-24 | Double sheet detector for sheet-fed rotary press |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60177206A true JPS60177206A (en) | 1985-09-11 |
Family
ID=12360428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59032490A Pending JPS60177206A (en) | 1984-02-24 | 1984-02-24 | Double sheet detector for sheet-fed rotary press |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60177206A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6420143A (en) * | 1987-06-19 | 1989-01-24 | Heidelberger Druckmasch Ag | Data input/output device controlled by processor |
EP0404287A2 (en) * | 1989-06-19 | 1990-12-27 | Komori Corporation | Sheet overlapping detecting method |
EP0853258A2 (en) * | 1997-01-13 | 1998-07-15 | Xerox Corporation | A sheet transport system |
-
1984
- 1984-02-24 JP JP59032490A patent/JPS60177206A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6420143A (en) * | 1987-06-19 | 1989-01-24 | Heidelberger Druckmasch Ag | Data input/output device controlled by processor |
EP0404287A2 (en) * | 1989-06-19 | 1990-12-27 | Komori Corporation | Sheet overlapping detecting method |
EP0853258A2 (en) * | 1997-01-13 | 1998-07-15 | Xerox Corporation | A sheet transport system |
EP0853258A3 (en) * | 1997-01-13 | 1998-11-04 | Xerox Corporation | A sheet transport system |
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