JPH0794167B2 - Printing density and gradation control device and control method for printing machine - Google Patents
Printing density and gradation control device and control method for printing machineInfo
- Publication number
- JPH0794167B2 JPH0794167B2 JP62223886A JP22388687A JPH0794167B2 JP H0794167 B2 JPH0794167 B2 JP H0794167B2 JP 62223886 A JP62223886 A JP 62223886A JP 22388687 A JP22388687 A JP 22388687A JP H0794167 B2 JPH0794167 B2 JP H0794167B2
- Authority
- JP
- Japan
- Prior art keywords
- ink
- water
- film thickness
- roller
- content ratio
- 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 - Lifetime
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- Rotary Presses (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は，印刷機の印刷濃度及び階調制御装置と制御方
法に関するものである。Description: TECHNICAL FIELD The present invention relates to a printing density and gradation control device and control method for a printing press.
（従来の技術） 従来の印刷機の印刷濃度及び階調制御装置を第４図によ
り説明すると，（01）が圧胴，（02）がブランケツト
胴，（03）が印刷用紙，（04）が版胴，（05）がインキ
着ローラ，（06）が第１着側揺動ローラ，（07）がイン
キローラ群，（08）が受渡しローラ，（09）がインキ元
ローラ，（010）がインキキー，（011）が第４着側揺動
ローラで，同第４着側揺動ローラ（011）及び上記第１
着側揺動ローラ（06）も上記インキローラ群（07）の一
部を構成している。また（012）が湿し水，（013）が水
元ローラ，（014）が伝達ローラ，（015）が水着ロー
ラ，（016）が水膜厚及びインキ膜厚センサ，（017）が
同水膜厚及びインキ膜厚センサ（016）の幅方向移動レ
ール，（018）が増幅器，（019）が制御器，（020）が
設定器，（021）が駆動装置（モータ），（022）が駆動
装置（モータ），（023）がインキブリセツトシステ
ム，（024）がパルスモータ，（025）が水元駆動モー
タ，（Ｗ）が増幅器（018）から制御器（019）への水膜
厚検出信号，（Ｉ）が増幅器（018）から制御器（019）
へのインキ膜厚検出信号，（Kw）が制御器（019）から
水元駆動モータ（025）への水元回転制御信号，（Ln）
が制御器（019）から駆動装置（022）へのセンサ移動信
号，（ｎ）が制御器（019）からインキブリセツトシス
テム（023）へのインキキー番号信号，（Ki）が制御器
（019）からインキブリセツトシステム（023）へのイン
キキー開度信号で，枚葉印刷機のインキ供給装置には，
インキ元ローラ（09）とインキキー（010）とがあり，
インキキー（010）の開度と受渡しローラ（08）の回転
数とを変えて，インキ供給部（09）（010）からインキ
ローラ群（07）へのインキの供給量をコントロールす
る。また同インキローラ群（07）の下流側には，第１着
側揺動ローラ（06）が配置され，同第１着側揺動ローラ
（06）の周面を指向して水膜厚及びインキ膜厚センサ
（016）が設置されており，同水膜厚及びインキ膜厚セ
ンサ（016）が幅方向移動レール（017）上を第１着側揺
動ローラ（06）の軸方向に移動して，水膜厚及びインキ
膜厚センサ（016）の水膜厚及びインキ膜厚を検出す
る。このとき，第４着側揺動ローラ（011）にもインキ
が供給され，このインキと第１着側揺動ローラ（06）上
のインキとがインキ着ローラ（05）を経て版胴（04）上
の版上へ転移する。一方，湿し水（012）が湿し水供給
装置の水元ローラ（013）と伝達ローラ（014）とのニツ
プ圧により調整されて，伝達ローラ（014）上へ供給さ
れる。なお同伝達ローラ（014）への湿し水（012）の供
給量は，水元ローラ（013）の回転数を変えることによ
っても調整可能である。またこの伝達ローラ（014）上
の湿し水（012）が水着ローラ（015）を経て版胴（04）
上の版上へ転移する。また版上に供給されたインキ及び
湿し水は，版上の画線部と非画線部との界面において，
相互に付着強さに差があり，この付着強さの差により，
インキが画線部に付着し，湿し水が非画線部に付着し
て，インキと湿し水とに分かれる。一方，湿し水は，こ
の作用の外に，インキ及び湿し水の界面張力と，インキ
との乳化作用とにより，インキローラ群（07）の方向へ
流れる。このとき，第１着側揺動ローラ（06）を経由す
るので，湿し水が水膜厚及びインキ膜厚センサ（016）
により検知される。このインキローラ群（07）の方向へ
流れる湿し水の水量が版面上の水量を間接的に表してい
るので，水膜厚及びインキ膜厚センサ（016）により，
第１着側揺動ローラ（06）の表面の水膜厚及びインキ膜
厚を検出すれば，版面上での，ひいては印刷用紙（03）
上での，インキ及び湿し水の量的関係が推定される。(Prior Art) A printing density and gradation control device of a conventional printing press will be described with reference to FIG. 4. (01) is an impression cylinder, (02) is a blanket cylinder, (03) is printing paper, and (04) is Plate cylinder, (05) inking roller, (06) first oscillating roller, (07) inking roller group, (08) delivery roller, (09) inking roller, (010) The ink key (011) is a fourth receiving-side swing roller, and the fourth receiving-side swing roller (011) and the first
The landing side swing roller (06) also constitutes a part of the ink roller group (07). Further, (012) is dampening water, (013) is a water source roller, (014) is a transmission roller, (015) is a swimsuit roller, (016) is a water film thickness and ink film thickness sensor, and (017) is the same water. A width direction moving rail of the film thickness and ink film thickness sensor (016), (018) is an amplifier, (019) is a controller, (020) is a setter, (021) is a drive unit (motor), and (022) is Drive device (motor), (023) ink-blister system, (024) pulse motor, (025) water source drive motor, (W) amplifier (018) to controller (019) water film thickness Detection signal, (I) is from amplifier (018) to controller (019)
Ink film thickness detection signal to the water source, (K w ) is the water source rotation control signal from the controller (019) to the water source drive motor (025), (L n )
Is a sensor movement signal from the controller (019) to the drive unit (022), (n) is an ink key number signal from the controller (019) to the ink blister system (023), and (K i ) is a controller (019). ) To the ink blister system (023), the ink key opening signal is sent to the ink supply device of the sheet-fed printing press.
There is an ink source roller (09) and an ink key (010),
By changing the opening degree of the ink key (010) and the rotation speed of the delivery roller (08), the ink supply amount from the ink supply section (09) (010) to the ink roller group (07) is controlled. Further, a first receiving-side rocking roller (06) is arranged on the downstream side of the ink roller group (07), and the water film thickness and An ink film thickness sensor (016) is installed, and the same water film thickness and ink film thickness sensor (016) moves on the width direction moving rail (017) in the axial direction of the first landing side swing roller (06). Then, the water film thickness and the ink film thickness sensor (016) detect the water film thickness and the ink film thickness. At this time, ink is also supplied to the fourth receiving-side rocking roller (011), and this ink and the ink on the first receiving-side rocking roller (06) pass through the inking roller (05) and the plate cylinder (04). ) Transfer to the upper plate. On the other hand, the dampening water (012) is adjusted by the nip pressure between the water source roller (013) and the transmission roller (014) of the dampening water supply device, and is supplied onto the transmission roller (014). The amount of dampening water (012) supplied to the transmission roller (014) can be adjusted by changing the rotation speed of the water source roller (013). Further, the dampening water (012) on the transmission roller (014) passes through the swimsuit roller (015) and then the plate cylinder (04).
Transfer to the upper plate. In addition, the ink and dampening water supplied on the plate, at the interface between the image area and the non-image area on the plate,
There is a difference in adhesive strength between each other, and due to this difference in adhesive strength,
Ink adheres to the image area, dampening water adheres to the non-image area, and is divided into ink and dampening water. On the other hand, the dampening water flows toward the ink roller group (07) due to the interfacial tension of the ink and the dampening water and the emulsifying action with the ink in addition to this function. At this time, since the dampening water passes through the first landing side swing roller (06), the dampening water has a water film thickness and ink film thickness sensor (016).
Detected by. Since the amount of dampening water flowing in the direction of the ink roller group (07) indirectly represents the amount of water on the plate surface, the water film thickness and ink film thickness sensor (016)
If the water film thickness and the ink film thickness on the surface of the first landing side swing roller (06) are detected, then the printing paper (03) on the plate surface is extended.
The above quantitative relationship between ink and fountain solution is estimated.
これらインキ及び湿し水の量的関係と印刷濃度及び階調
との間には，密接な関係があるので，次の制御を行っ
て，水膜厚及びインキ膜厚センサ（016）の水膜厚検出
信号（Ｗ）及びインキ膜厚検出信号（Ｉ）を水膜厚目標
値及びインキ膜厚目標値に一致させるようにしている。
即ち，水元回転制御信号（Kw）を制御器（019）から駆
動装置（021）→水元駆動モータ（025）へ送って，同水
元駆動モータ（025）を駆動し，水元ローラ（013）を回
転して，湿し水（012）を伝達ローラ（014）へ供給す
る。またインキキー番号信号（ｎ）とインキキー開度信
号（Ki）とをインキプリセツトシステム（023）を経て
次のインキキー（010），即ち，絵柄の幅方向分布（イ
ンキ消費量の幅方向分布）に応じてインキ供給量を可変
にするために，幅方向に多数の区間に分割し且つ同各分
割区間の開度δを増減変更できるように構成したインキ
キー（010）へ送り，上記各分割区間の開度δを開い
て，インキを受渡しローラ（08）→インキローラ群（0
7）へ供給しているときに，センサ移動信号（Ln）を制
御器（019）から駆動装置（022）→パルスモータ（02
4）へ送って，同パルスモータ（024）を駆動し，幅方向
移動レール（017）により移動可能に支持されている水
膜厚及びインキ膜厚センサ（016）を第１着側揺動ロー
ラ（06）の軸方向に連続的に移動させて，第１着側揺動
ローラ（06）の表面の水膜厚及びインキ膜厚を検出し，
そのとき得られた検出値信号（水膜厚検出信号（Ｗ）及
びインキ膜厚検出信号（Ｉ）を増幅器（018）→制御器
（019）へ送って，これらの検出値信号と，設定器（02
0）から制御器（019）へ送られた水膜厚目標値及びイン
キ膜厚目標値とを比較，演算し，その結果得られた水元
回転制御信号（Kw）を制御器（019）から駆動装置（02
1）→水元駆動モータ（025）へ送って，水元ローラ（01
3）の回転数を調整する一方，インキキー番号信号
（ｎ）とインキキー開度信号（Ki）とをインキプリセツ
トシステム（023）→インキキー（010）へ送り，各分割
区間の開度δを調整して，水膜厚及びインキ膜厚センサ
（016）からの水膜厚検出信号（Ｗ）及びインキ膜厚検
出信号（Ｉ）を水膜厚目標値及びインキ膜厚目標値に一
致させるようにしている。Since there is a close relationship between the quantitative relationship between these inks and dampening water and the printing density and gradation, the following control is performed to determine the water film thickness and the water film of the ink film thickness sensor (016). The thickness detection signal (W) and the ink film thickness detection signal (I) are made to match the water film thickness target value and the ink film thickness target value.
That is, the water source rotation control signal (K w ) is sent from the controller (019) to the drive device (021) → the water source drive motor (025) to drive the water source drive motor (025) to drive the water source roller. The dampening water (012) is supplied to the transmission roller (014) by rotating (013). The ink key number signal (n) and the ink key opening signal (K i ) are passed through the ink preset system (023) to the next ink key (010), that is, the widthwise distribution of the pattern (widthwise distribution of ink consumption). In order to make the ink supply amount variable in accordance with the above, the ink is divided into a number of sections in the width direction and sent to an ink key (010) configured so that the opening δ of each section can be increased or decreased. Open the opening δ of the ink delivery roller (08) → ink roller group (0
7) is being supplied to the sensor movement signal (L n ) from the controller (019) to the drive unit (022) → pulse motor (02
4), the pulse motor (024) is driven, and the water film thickness and ink film thickness sensor (016) movably supported by the width direction moving rail (017) is moved to the first attachment side swing roller. By continuously moving in the axial direction of (06), the water film thickness and the ink film thickness of the surface of the first landing side swing roller (06) are detected,
The detection value signals (water film thickness detection signal (W) and ink film thickness detection signal (I) obtained at that time are sent to the amplifier (018) → controller (019), and these detection value signals and the setting device are set. (02
0) to the controller (019), the water film thickness target value and the ink film thickness target value are compared and calculated, and the water source rotation control signal (K w ) obtained as a result is controlled by the controller (019). Drive device (02
1) → Send it to the water source drive motor (025) and
While adjusting the number of revolutions in 3), send the ink key number signal (n) and the ink key opening signal (K i ) to the ink preset system (023) → ink key (010) to set the opening δ of each divided section. Adjust to match the water film thickness detection signal (W) and the ink film thickness detection signal (I) from the water film thickness and ink film thickness sensor (016) to the water film target value and the ink film target value. I have to.
（発明が解決しようとする課題） 前記４図に示す印刷機の印刷濃度及び階調制御装置のイ
ンキキー（010）は，絵柄の幅方向分布（インキ消費量
の幅方向分布）に応じてインキ供給量を可変にするため
に，幅方向に多数の区間に分割し且つ同各分割区間の開
度δを増減変更できるように構成されているので，印刷
機の全幅でインキの供給量を制御するためには，水膜厚
及びインキ膜厚センサ（016）を第１着側揺動ローラ（0
6）の軸方向に連続的に移動させる必要がある。例えば
インキキー（010）のある一つの分割区間に着目する
と，水膜厚及びインキ膜厚を検出した後，再び同分割区
間に戻ってきて水膜厚及びインキ膜厚を検出するまでの
時間，その分割区間では，水膜厚及びインキ膜厚が検出
されないことになって，印刷濃度及び階調の制御性が悪
い。また印刷中，水膜厚及びインキ膜厚センサ（016）
が第１着側揺動ローラ（06）の軸方向に連続的に移動す
るので，作業の安全性が損なわれる上に，作業能率が低
下するという問題があった。(Problems to be Solved by the Invention) The ink density (010) of the printing density and gradation control device of the printing machine shown in FIG. 4 is supplied with ink according to the widthwise distribution of the pattern (widthwise distribution of ink consumption). In order to make the amount variable, it is divided into a number of sections in the width direction and the opening δ of each divided section can be increased / decreased. Therefore, the ink supply amount is controlled by the entire width of the printing press. In order to adjust the water film thickness and the ink film thickness sensor (016),
6) It is necessary to move continuously in the axial direction. For example, paying attention to one divided section of the ink key (010), after detecting the water film thickness and the ink film thickness, the time to return to the same divided section and detect the water film thickness and the ink film thickness, In the divided section, the water film thickness and the ink film thickness are not detected, and the controllability of print density and gradation is poor. Also, during printing, water film thickness and ink film thickness sensor (016)
Moves continuously in the axial direction of the first landing side swing roller (06), which causes a problem that work safety is impaired and work efficiency is reduced.
本発明は前記の問題点に鑑み提案するものであり、その
目的とする処は、印刷濃度及び階調の制御性を向上で
き、作業の安全性を確保できる上に、作業能率を向上
できる印刷機の印刷濃度及び階調制御装置と制御方法を
提供しようとする点にある。The present invention is proposed in view of the above problems, and an object of the present invention is to improve controllability of print density and gradation, ensure work safety, and improve printing efficiency. It is an object to provide a printing density and gradation control device and a control method for a machine.
（課題を解決するための手段） 上記の目的を達成するために、本発明の印刷機の印刷濃
度及び階調制御装置は、インキローラの近傍を同インキ
ローラの軸方向に移動可能に支持されて印刷時には印刷
する刷版に応じて適当位置に固定される含水比及びイン
キ膜厚センサと、同含水比及びインキ膜厚センサからの
検出信号と予め入力している含水比目標値及びインキ膜
厚目標値とを比較、演算して上記各検出値を上記各目標
値に一致させるための水元ローラ回転制御信号及びイン
キ元ローラ回転数信号を得るとともに同水元ローラ回転
制御信号を水元駆動モータへ送り同インキ元ローラ回転
数信号をインキプリセツトシステムを経てインキ元ロー
ラへ送る制御器とを具えている。(Means for Solving the Problems) In order to achieve the above object, a printing density and gradation control device of a printing machine of the present invention is supported near an ink roller so as to be movable in an axial direction of the ink roller. The water content ratio and the ink film thickness sensor are fixed at appropriate positions according to the printing plate to be printed, and the detection signal from the water content ratio and the ink film thickness sensor and the water content ratio target value and ink film that are input in advance. A water-source roller rotation control signal and an ink-source roller rotation number signal for comparing and calculating the target values with the target thickness values are obtained, and the same water-source roller rotation control signals are used as the water source. It also has a controller for sending the rotation speed signal of the same ink source roller to the drive motor through the ink presetting system.
また本発明の印刷機の印刷濃度及び階調制御方法は、イ
ンキローラ表面の任意の検出点のインキ膜厚及び含水比
を検出し、同各検出値と予め設定されている上記検出点
における含水比目標値及びインキ膜厚目標値とを比較、
演算し、この演算の結果得られた水元ローラ回転制御信
号を水元駆動モータへ送って、水元ローラの回転数を制
御するとともに、上記演算の結果得られたインキ元ロー
ラ回転数信号をインキプリセツトシステムを経てインキ
元ローラへ送って、インキ元ローラの回転数を制御する
ことを特徴としている。Further, the printing density and gradation control method of the printing machine of the present invention detects the ink film thickness and the water content ratio at any detection point on the ink roller surface, and the respective detection values and the water content at the detection point set in advance. Compare the ratio target value and the ink film thickness target value,
Calculate and send the water-source roller rotation control signal obtained as a result of this calculation to the water-source drive motor to control the rotation speed of the water-source roller, The feature is that the number of revolutions of the ink source roller is controlled by sending it to the ink source roller through the ink preset system.
（作用） 本発明の印刷機の印刷濃度及び階調制御装置と制御方法
は前記のように構成されており，印刷開始に先立ってイ
ンキブリセツトシステムから制御器へ幅方向の画線率分
布情報を送り，同制御器は，この幅方向の画線率分布情
報に基づいて得られたセンサ移動信号を含水比及びイン
キ膜厚センサの駆動装置へ送って，同含水比及びインキ
膜厚センサをインキローラの軸方向に適当な位置まで移
動させた後，固定し，次いで同含水比及びインキ膜厚セ
ンサにより得られたインキローラの含水比検出信号及び
インキ膜厚検出信号を制御器へ送り，これらの含水比検
出信号及びインキ膜厚検出信号と，制御器に予め入力さ
れている含水比目標値及びインキ膜厚目標値とを比較，
演算し，その結果得られた制御信号（水元ローラ回転制
御信号）を湿し水供給装置へ送って，水元ローラの回転
数を調整し，また上記演算の結果得られた制御信号（イ
ンキ元ローラ回転数信号）をインキ供給装置へ送って、
インキ元ローラの回転数を調整する。(Operation) The printing density and gradation control device and control method of the printing press according to the present invention are configured as described above. Prior to the start of printing, the ink blanket system transfers information to the controller about the image ratio distribution information in the width direction. The controller sends the sensor movement signal obtained based on the image ratio distribution information in the width direction to the drive unit of the water content ratio and the ink film thickness sensor, and the water content ratio and the ink film thickness sensor are After moving to an appropriate position in the axial direction of the ink roller, fixing it, and then sending the water content ratio detection signal and ink film thickness detection signal of the ink roller obtained by the same water content ratio and ink film thickness sensor to the controller, The water content ratio detection signal and the ink film thickness detection signal are compared with the water content ratio target value and the ink film thickness target value which are input in advance in the controller.
The calculated control signal (water-source roller rotation control signal) is sent to the dampening water supply device to adjust the rotation speed of the water-source roller, and the control signal (ink The original roller rotation speed signal) is sent to the ink supply device,
Adjust the rotation speed of the ink source roller.
（実施例） 次に本発明の印刷機の印刷濃度及び階調制御装置を第１
図に示す一実施例により説明すると，（１）が圧胴，
（２）がブランケツト胴，（３）が印刷用紙，（４）が
版胴，（５）がインキ着ローラ，（６）が第１着側揺動
ローラ，（７）がインキローラ群，（８）が受渡しロー
ラ，（９）がインキ元ローラ，（10）がインキキー，
（11）が第４着側揺動ローラで，同第４着側揺動ローラ
（11）及び上記第１着側揺動ローラ（６）も上記インキ
ローラ群（７）の一部を構成している。また（12）が湿
し水，（13）が水元ローラ，（14）が伝達ローラ，（1
5）が水着ローラ，（16）が含水比及びインキ膜厚セン
サ，（17）が同含水比及びインキ膜厚センサ（16）の幅
方向移動レール，（18）が増幅器，（19）が制御器，
（20）が設定器，（21）が駆動装置（モータ），（22）
が駆動装置（モータ），（23）がインキブリセツトシス
テム，（24）がパルスモータ，（25）が水元駆動モー
タ，（Ｗ）が増幅器（18）から制御器（19）への含水比
検出信号，（Ｉ）が増幅器（18）から制御器（19）への
インキ膜厚検出信号，（Kw）が制御器（19）から水元駆
動モータ（25）への水元回転制御信号（Kr）が制御器
（19）からインキブリセツトシステム（23）へのインキ
元ローラ回転数信号，（Ln）が制御器（19）から駆動装
置（22）へのセンサ移動信号，（ｍ）がインキブリセツ
トシステム（23）から制御器（19）への幅方向の画線率
分布情報で，上記含水比及びインキ膜厚センサ（16）が
上記幅方向移動レール（17）により第１着側揺動ローラ
（インキローラ）（６）の近傍を同第１着側揺動ローラ
（６）の軸方向に移動可能に支持されて，印刷時には，
印刷する刷版に応じて適当位置に固定されるようになっ
ている。また同含水比及びインキ膜厚センサ（16）から
増幅器（18）を経て制御器（19）へ入力された含水比検
出信号（Ｗ）及びインキ膜厚検出信号（Ｉ）と，設定器
（20）から制御器（19）へ入力された含水比目標値及び
インキ膜厚目標値とが比較，演算され，その結果得られ
た水元回転制御信号（Kw）が水元駆動モータ（25）へ送
られて，水元ローラ（13）の回転数が調整される。また
上記演算の結果得られたインキ元ローラ回転数信号
（Kr）がインキブリセツトシステム（23）を経てインキ
元ローラ（９）へ送られて，同インキ元ローラ（９）の
回転数が調整されるようになっている。また制御器（1
9）は，前記従来のもののようにインキキー（10）の制
御信号を送る代わりに，インキブリセツトシステム（2
3）から幅方向の画線率分布情報（ｍ）を受け取るよう
になっている。(Embodiment) Next, a printing density and gradation control device for a printing machine according to the present invention is first described.
Explaining with one embodiment shown in the figure, (1) is an impression cylinder,
(2) is a blanket cylinder, (3) is printing paper, (4) is a plate cylinder, (5) is an inking roller, (6) is a first-side swing roller, (7) is an ink roller group, ( 8) is a delivery roller, (9) is an ink source roller, (10) is an ink key,
(11) is a fourth landing-side rocking roller, and the fourth landing-side rocking roller (11) and the first landing-side rocking roller (6) also constitute a part of the ink roller group (7). ing. Further, (12) dampening water, (13) water source roller, (14) transmission roller, (1
5) swimsuit roller, (16) water content ratio and ink film thickness sensor, (17) same water content and ink film thickness sensor (16) width direction moving rail, (18) amplifier, (19) control vessel,
(20) is a setting device, (21) is a driving device (motor), (22)
Is a drive unit (motor), (23) is an ink jet system, (24) is a pulse motor, (25) is a water source drive motor, and (W) is a water content ratio from an amplifier (18) to a controller (19). The detection signal, (I) is the ink film thickness detection signal from the amplifier (18) to the controller (19), and (K w ) is the water source rotation control signal from the controller (19) to the water source drive motor (25). (K r ) is the ink source roller rotation speed signal from the controller (19) to the ink blister system (23), (L n ) is the sensor movement signal from the controller (19) to the drive unit (22), ( m) is the information on the distribution of the image rate in the width direction from the ink blister system (23) to the controller (19). The water content ratio and the ink film thickness sensor (16) are detected by the width direction moving rail (17). The vicinity of the first receiving side swing roller (ink roller) (6) is supported so as to be movable in the axial direction of the first receiving side swing roller (6). When printing,
It is designed to be fixed at an appropriate position according to the printing plate to be printed. Further, the water content ratio detection signal (W) and the ink film thickness detection signal (I) input to the controller (19) from the same water content and ink film thickness sensor (16) via the amplifier (18) and the setting device (20). ), The water content ratio target value and the ink film thickness target value input to the controller (19) are compared and calculated, and the water-source rotation control signal (K w ) obtained as a result is supplied to the water-source drive motor (25). And the number of rotations of the water source roller (13) is adjusted. Also, the ink source roller rotation speed signal (K r ) obtained as a result of the above calculation is sent to the ink source roller (9) through the ink brilliant system (23), and the rotation speed of the ink source roller (9) is changed. It is supposed to be adjusted. In addition, the controller (1
Instead of sending the control signal of the ink key (10) like the conventional one, the 9) is an ink blister system (2).
The area-wise distribution ratio information (m) is received from 3).
次に前記第１図に示す印刷機の印刷濃度及び階調制御装
置の作用を具体的に説明する。印刷開始に先立ってイン
キブリセツトシステム（23）から制御器（19）へ幅方向
の画線率分布情報（ｍ）を送る。同制御器（19）は，こ
の幅方向の画線率分布情報（ｍ）に基づいて得られたセ
ンサ移動信号（Ln）を駆動装置（22）へ送って，パルス
モータ（24）を駆動し，幅方向移動レール（17）により
支持されている含水比及びインキ膜厚センサ（16）を第
１着側揺動ローラ（６）の軸方向に適当な位置まで移動
させた後，同含水比及びインキ膜厚センサ（16）を同位
置に固定する。その後，同含水比及びインキ膜厚センサ
（16）により得られた第１着側揺動ローラ（６）の含水
比検出信号（Ｗ）及びインキ膜厚検出信号（Ｉ）を増幅
器（18）を経て制御器（19）へ送り，これらの含水比検
出信号（Ｗ）及びインキ膜厚検出信号（Ｉ）と，設定器
（20）から制御器（19）へ入力した含水比目標値及びイ
ンキ膜厚目標値とを比較，演算し，その結果得られた水
元ローラ回転制御信号（Kw）を水元駆動モータ（25）へ
送って，水元ローラ（13）の回転数を調整し，また上記
演算の結果得られたインキ元ローラ回転数信号（Kr）を
インキブリセツトシステム（23）を経てインキ元ローラ
（９）へ送って、同インキ元ローラ（９）の回転数を調
整する。Next, the operation of the printing density and gradation control device of the printing machine shown in FIG. 1 will be specifically described. Prior to the start of printing, the ink blanket system (23) sends the image rate distribution information (m) in the width direction to the controller (19). The controller (19) sends a sensor movement signal (L n ) obtained on the basis of the image rate distribution information (m) in the width direction to the drive device (22) to drive the pulse motor (24). Then, after moving the water content ratio and the ink film thickness sensor (16) supported by the width direction moving rail (17) to an appropriate position in the axial direction of the first receiving side swing roller (6), Fix the ratio and ink film thickness sensor (16) at the same position. Then, the water content ratio detection signal (W) and the ink film thickness detection signal (I) of the first oscillating roller (6) obtained by the same water content ratio and ink film thickness sensor (16) are fed to an amplifier (18). After that, the water content ratio detection signal (W) and the ink film thickness detection signal (I) are sent to the controller (19), and the water content target value and the ink film input from the setter (20) to the controller (19). The thickness target value is compared and calculated, and the water source roller rotation control signal ( Kw ) obtained as a result is sent to the water source drive motor (25) to adjust the rotation speed of the water source roller (13). Also, the ink source roller rotation speed signal (K r ) obtained as a result of the above calculation is sent to the ink source roller (9) via the ink blister system (23) to adjust the rotation speed of the ink source roller (9). To do.
本発明の印刷機の印刷濃度及び階調制御装置では、含水
比及びインキ膜厚センサ（16）を第１着側揺動ローラ
（６）の軸方向に適当な位置まで移動させた後，同含水
比及びインキ膜厚センサ（16）を同位置に固定している
が，含水比及びインキ膜厚センサ（16）を固定しても，
印刷濃度及び階調の制御性を向上できる。即ち，制御し
ようとする印刷濃度と階調のうち，階調については，湿
し水供給量と密接な関係がある。第２図は，含水比（含
水比＝水膜厚／インキ膜厚）と階調との関係を示してい
る。同第２図の相対コントラストとは，（1.0−DR/DV）
により定義される量である。但しDRは網点部分の濃度,D
Vはベタ濃度である。この相対コントラストが高い程，
階調がよく，含水比が少ない程，階調がよい。但し含水
比をあまり少なくすると，例えば第２図のX1よりも少な
くすると，本来，インキの付着してはならない非画線部
にインキが付着して、画像が形成されなくなる。このX1
を下限含水比と呼んでいる。階調を良好にするために
は，含水比をX1近くに制御すればよい。この下限含水比
の画線率の大小による変化の実測例を第３図に実線で示
した。第３図の実線よりも下方の斜線の領域では，画像
が形成されず，上方の領域のみで画像が形成される。同
第３図から下限含水比は，画線率に関係なく略一定であ
り，幅方向に絵柄分布（画線率分布）があっても，或る
個所での含水比が幅方向全体の含水比を代表している。
この事実と，次の事実，即ち，現在の湿し水供給装置で
は，インキ供給装置のように幅方向に供給量を変えるこ
とができず，その時点の水元ローラ回転数で決まる供給
量を幅方向に一定にしかできない事実とを考慮すると，
含水比及びインキ膜厚センサ（16）を或る位置に固定し
ても，インキローラの軸方向に移動させる場合と同様に
そのときの絵柄に対する最高の階調を幅方向全体で再現
できて，印刷濃度及び階調の制御性を向上できる。In the printing density and gradation control device of the printing machine of the present invention, the water content ratio and the ink film thickness sensor (16) are moved to an appropriate position in the axial direction of the first landing side swing roller (6), and then the same. Although the water content ratio and the ink film thickness sensor (16) are fixed at the same position, even if the water content ratio and the ink film thickness sensor (16) are fixed,
The controllability of print density and gradation can be improved. That is, of the print density and the gradation to be controlled, the gradation has a close relationship with the dampening water supply amount. FIG. 2 shows the relationship between the water content ratio (water content ratio = water film thickness / ink film thickness) and gradation. The relative contrast in Fig. 2 is (1.0-D R / D V ).
Is the amount defined by. Where D R is the density of the halftone dot part, D
V is the solid density. The higher this relative contrast,
The better the gradation and the lower the water content, the better the gradation. However, if the water content is too small, for example, if it is less than X 1 in FIG. 2, the ink adheres to the non-image area where the ink should not adhere, and an image is not formed. This X 1
Is called the lower limit water content ratio. To improve the gradation, the water content ratio should be controlled near X 1 . An actual measurement example of the change in the lower water content ratio depending on the size of the drawing rate is shown by a solid line in FIG. No image is formed in the shaded area below the solid line in FIG. 3, and an image is formed only in the area above. From Fig. 3, the lower limit water content ratio is almost constant regardless of the drawing rate, and even if there is a pattern distribution (drawing rate distribution) in the width direction, the water content ratio at a certain location is the water content in the entire width direction. Represents the ratio.
This fact and the following fact, that is, the present dampening water supply device cannot change the supply amount in the width direction like the ink supply device, and the supply amount determined by the rotation speed of the water source roller at that time cannot be changed. Considering the fact that it can only be constant in the width direction,
Even if the water content ratio and the ink film thickness sensor (16) are fixed at a certain position, the highest gradation for the picture at that time can be reproduced in the entire width direction, as in the case of moving in the axial direction of the ink roller. The controllability of print density and gradation can be improved.
（発明の効果） 本発明の印刷機の印刷濃度及び階調制御装置は前記のよ
うに印刷開始に先立ってインキブリセツトシステムから
制御器へ幅方向の画線率分布情報を送り，同制御器は，
この幅方向の画線率分布情報に基づいて得られたセンサ
移動信号を含水比及びインキ膜厚センサの駆動装置へ送
って，同含水比及びインキ膜厚センサをインキローラの
軸方向に適当な位置まで移動させた後，固定し，次いで
同含水比及びインキ膜厚センサにより得られたインキロ
ーラの含水比検出信号及びインキ膜厚検出信号を制御器
へ送り，これらの含水比検出信号及びインキ膜厚検出信
号と，制御器に予め入力されている含水比目標値及びイ
ンキ膜厚目標値とを比較，演算し，その結果得られた制
御信号（水元ローラ回転制御信号）を湿し水供給装置へ
送って，水元ローラの回転数を調整し，また上記演算の
結果得られた制御信号（インキ元ローラ回転数信号）を
インキ供給装置へ送って、インキ元ローラの回転数を調
整するので，印刷濃度及び階調の制御性を向上できる。
また印刷中，含水比及びインキ膜厚センサをインキロー
ラの軸方向に移動させる必要がなくて，作業の安全性を
確保できる上に，作業能率を向上できる効果がある。(Effect of the Invention) As described above, the printing density and gradation control device of the printing machine of the present invention sends the image ratio distribution information in the width direction from the ink blister system to the controller prior to the start of printing, and the controller Is
The sensor movement signal obtained on the basis of the image rate distribution information in the width direction is sent to the drive unit of the water content ratio and the ink film thickness sensor, and the water content ratio and the ink film thickness sensor are appropriately set in the axial direction of the ink roller. After moving to the position, fix it, and then send the water content ratio detection signal and ink film thickness detection signal of the ink roller obtained by the same water content ratio and ink film thickness sensor to the controller. The film thickness detection signal is compared with the water content ratio target value and the ink film thickness target value that are input in advance to the controller, and the calculated control signal (water source roller rotation control signal) is dampening water. Adjust the rotation speed of the ink source roller by sending it to the ink supply device and send the control signal (ink origin roller rotation speed signal) obtained as a result of the above calculation to the ink supply device. So print It can improve the controllability of the degree and the gradation.
Further, during printing, it is not necessary to move the water content ratio and the ink film thickness sensor in the axial direction of the ink roller, which not only ensures the safety of work but also has the effect of improving work efficiency.
第１図は本発明に係わる印刷機の印刷濃度及び階調制御
装置の一実施例を示す系統図，第２図は含水比と相対コ
ントラストとの関係を示す説明図，第３図は画線率と含
水比との関係を示す説明図，第４図は従来の印刷機の印
刷濃度及び階調制御装置を示す系統図である。 （６）（11）……インキローラ（揺動ローラ），（７）
……インキローラ群，（９）……インキ供給装置のイン
キ元ローラ，（10）……インキ供給装置のインキキー,,
（12）……湿し水，（13）……湿し水供給装置の水元ロ
ーラ，（16）……含水比及びインキ膜厚センサ，（19）
……制御器，（20）……含水比目標値及びインキ膜厚目
標値の設定器，（Ｗ）……含水比及びインキ膜厚センサ
（16）からの含水比検出信号，（Ｉ）……含水比及びイ
ンキ膜厚センサ（16）からのインキ膜厚検出信号。FIG. 1 is a system diagram showing an embodiment of a printing density and gradation control device for a printing press according to the present invention, FIG. 2 is an explanatory diagram showing the relationship between water content ratio and relative contrast, and FIG. FIG. 4 is an explanatory view showing the relationship between the rate and the water content ratio, and FIG. 4 is a system diagram showing a printing density and gradation control device of a conventional printing machine. (6) (11) ... Ink roller (swing roller), (7)
Ink roller group, (9) Ink source roller of ink supply device, (10) Ink key of ink supply device,
(12) ... dampening water, (13) ... water source roller of dampening water supply device, (16) ... water content ratio and ink film thickness sensor, (19)
...... Controller, (20) …… Water content ratio target value and ink film thickness target value setter, (W) …… Water content ratio and water content ratio detection signal from ink film thickness sensor (16), (I)… ... Water content ratio and ink film thickness detection signal from the ink film thickness sensor (16).
Claims (2)
方向に移動可能に支持されて印刷時には印刷する刷版に
応じて適当位置に固定される含水比及びインキ膜厚セン
サと、同含水比及びインキ膜厚センサからの検出信号と
予め入力している含水比目標値及びインキ膜厚目標値と
を比較、演算して上記各検出値を上記各目標値に一致さ
せるための水元ローラ回転制御信号及びインキ元ローラ
回転数信号を得るとともに同水元ローラ回転制御信号を
水元駆動モータへ送り同インキ元ローラ回転数信号をイ
ンキプリセツトシステムを経てインキ元ローラへ送る制
御器とを具えていることを特徴とした印刷機の印刷濃度
及び階調制御装置。1. A water content ratio and an ink film thickness sensor which are movably supported in the vicinity of the ink roller in the axial direction of the ink roller and fixed at appropriate positions according to the printing plate to be printed, and the water content ratio. Also, the water source roller rotation for comparing and calculating the detection signal from the ink film thickness sensor with the previously input water content ratio target value and ink film thickness target value to match each detection value with each target value. A controller that obtains the control signal and the ink source roller rotation number signal and sends the same water source roller rotation control signal to the water source drive motor and sends the same ink source roller rotation number signal to the ink source roller via the ink preset system. A printing density and gradation control device for a printing press, which is characterized by
膜厚及び含水比を検出し、同各検出値と予め設定されて
いる上記検出点における含水比目標値及びインキ膜厚目
標値とを比較、演算し、この演算の結果得られた水元ロ
ーラ回転制御信号を水元駆動モータへ送って、水元ロー
ラの回転数を制御するとともに、上記演算の結果得られ
たインキ元ローラ回転数信号をインキプリセツトシステ
ムを経てインキ元ローラへ送って、インキ元ローラの回
転数を制御することを特徴とした印刷機の印刷濃度及び
階調制御方法。2. An ink film thickness and a water content ratio at arbitrary detection points on the surface of an ink roller are detected, and the respective detection values and a water content ratio target value and an ink film thickness target value at the detection points which are set in advance are detected. Comparison and calculation are performed, and the water-source roller rotation control signal obtained as a result of this calculation is sent to the water-source drive motor to control the rotation speed of the water-source roller, and the ink-source roller rotation speed obtained as a result of the above calculation. A printing density and gradation control method for a printing press, characterized in that a signal is sent to an ink source roller through an ink preset system to control the number of revolutions of the ink source roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62223886A JPH0794167B2 (en) | 1987-09-09 | 1987-09-09 | Printing density and gradation control device and control method for printing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62223886A JPH0794167B2 (en) | 1987-09-09 | 1987-09-09 | Printing density and gradation control device and control method for printing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6467342A JPS6467342A (en) | 1989-03-14 |
| JPH0794167B2 true JPH0794167B2 (en) | 1995-10-11 |
Family
ID=16805250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62223886A Expired - Lifetime JPH0794167B2 (en) | 1987-09-09 | 1987-09-09 | Printing density and gradation control device and control method for printing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0794167B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003004420A (en) * | 2001-06-26 | 2003-01-08 | Toppan Printing Co Ltd | Measurement method and apparatus using optical sensor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2930385B2 (en) * | 1990-07-26 | 1999-08-03 | 三菱重工業株式会社 | Damping water control device |
| JP2001212940A (en) * | 2000-01-31 | 2001-08-07 | Toppan Printing Co Ltd | Method for controlling dampening water supply amount and controller used therefor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58153655A (en) * | 1982-03-10 | 1983-09-12 | Toppan Printing Co Ltd | Method and device for supplying ink and dampening water |
| JPS60196349A (en) * | 1984-03-19 | 1985-10-04 | Fuji Photo Film Co Ltd | Instrumentation equipment of state of lithographic plate surface during printing |
| JPS61148061A (en) * | 1984-12-24 | 1986-07-05 | Mitsubishi Heavy Ind Ltd | Automatic control method of ink and damping water in offset printing machine |
-
1987
- 1987-09-09 JP JP62223886A patent/JPH0794167B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58153655A (en) * | 1982-03-10 | 1983-09-12 | Toppan Printing Co Ltd | Method and device for supplying ink and dampening water |
| JPS60196349A (en) * | 1984-03-19 | 1985-10-04 | Fuji Photo Film Co Ltd | Instrumentation equipment of state of lithographic plate surface during printing |
| JPS61148061A (en) * | 1984-12-24 | 1986-07-05 | Mitsubishi Heavy Ind Ltd | Automatic control method of ink and damping water in offset printing machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003004420A (en) * | 2001-06-26 | 2003-01-08 | Toppan Printing Co Ltd | Measurement method and apparatus using optical sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6467342A (en) | 1989-03-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |