JP2013075519A - Control device of printer and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the waste of a printing material at transfer from proof printing to final printing without a large investment for facilities.SOLUTION: A color bar of a printed matter from a proof-printed 20th sheet (from a measurement start sheet) is photographed by an inspection camera 20, and an RGB value of each color patch is acquired. The RGB value of each color patch is converted to a density value by using a benchmark conversion formula (D=log10f (RGB value)) of each color which is acquired in a preparation stage, and using a correction value (ΔRGB value ) of each color patch which is acquired according the printing material, and printing is continued as it is without being stopped as far as the density value of each converted color patch is within a tolerable range and transferred to the final printing. Here, when even merely one of the density values of the color patches is out of the tolerable range, an ink film thickness distribution is adjusted, the printed matter which is printed in a state that the ink film thickness distribution is adjusted is set as the next printed matter to be measured, and density measurement (conversion to the density value from the RGB value) by the inspection camera 20 is repeated.

Description

  The present invention relates to a control device and a control method for a printing press that performs a trial printing before starting a main printing.

  FIG. 44 shows a main part of an inker (ink supply device) in a printing unit for each color in the printing machine. In the figure, 1 is an ink fountain, 2 is ink stored in the ink fountain 1, 3 is an ink fountain roller, 4 (4-1 to 4-n) are provided in parallel in the axial direction of the ink fountain roller 3. An ink fountain key, 5 is an ink calling roller, 6 is an ink roller group, 7 is a printing plate, 8 is a plate cylinder on which the printing plate 7 is mounted, and the printing plate 7 has a pattern printed thereon.

  This ink supply device supplies the ink 2 in the ink fountain 1 to the ink fountain roller 3 by adjusting the opening degree of the ink fountain keys 4-1 to 4-n, and the ink supplied to the ink fountain roller 3 is supplied to the ink call roller 5. The ink is supplied to the printing plate 7 through the ink roller group 6 by a calling operation. The ink supplied to the printing plate 7 is printed on printing paper through a rubber cylinder (not shown). Ink rollers 6-1 to 6-4 that are in contact with the printing plate 7 are provided at the end of the ink flow path of the ink roller group 6.

  FIG. 45 shows a printed matter printed by this printing machine. On the printed matter 9, a strip-shaped color bar 9-2 is printed in a blank portion excluding the pattern area 9-1. The color bar 9-2 is a patch for density measurement of black (sumi), cyan (eye), magenta (red), and yellow (ki) (solid patch with a dot area ratio of 100%) 9a1 in the case of general four-color printing. , 9a2, 9a3, 9a4, and regions S1 to Sn. The areas S1 to Sn correspond to the key zones of the ink fountain keys 4-1 to 4-n in each color printing unit in the printing press. Hereinafter, the patch for density measurement is referred to as a color patch.

[Replace plate]
When the printing plate 7 is replaced with a new printing plate 7 ′, the opening amount of the ink fountain keys 4-1 to 4-n and the rotation amount of the ink fountain roller 3 are added to the values according to the design of the new printing plate 7 ′. Preset. That is, the ink 2 in the ink fountain 1 passes through the ink roller group 6 with the opening amount of the ink fountain keys 4-1 to 4-n and the rotation amount of the ink fountain roller 3 as values according to the pattern of the new printing plate 7 ′. Supplied to the new printing plate 7 '. In this case, a trial printing is performed before the main printing, the ink supply amount is adjusted, and a satisfactory color tone is obtained. Thereby, a desired ink film thickness distribution (gradient of ink film thickness) is created in the ink roller group 6.

  However, in this ink supply apparatus, when the printing plate 7 is replaced with a new printing plate 7 ′, the ink film thickness distribution with respect to the old printing plate 7 remains in the ink roller group 6. That is, in this case, the ink film thickness distribution for the old printing plate 7 must be gradually changed to the ink film thickness distribution for the new printing plate 7 ′, and the ink supply amount is adjusted until a satisfactory color tone is obtained. Trial printing is required excessively, and problems such as “increased preparation time before printing”, “increased labor load”, “wasted printing materials”, “decreased production efficiency”, and “cost increase” occur.

  Therefore, the applicant of the present invention has proposed the “ink film thickness adjustment” as shown in Patent Documents 1 and 2 for the purpose of reducing the number of ink supply adjustments and trial printings until a satisfactory color tone is obtained. A control method was proposed.

[Ink removing + pre-inking II]
In the ink film thickness control method described in Patent Document 1, when the old printing plate 7 is replaced with the new printing plate 7 ′, ink removal is first performed. In other words, an ink removing operation is designated on a display (not shown), the calling operation of the ink calling roller 5 is stopped, and a predetermined number of sheets are printed by operating the machine with the old printing plate 7 mounted. (Blank paper printing), thereby reducing the ink in the ink supply device (reducing printing), and the minimum ink film thickness distribution required during printing which becomes thinner in the ink roller group 6 from upstream to downstream Ma (see FIG. 46A), that is, an ink film thickness distribution Ma corresponding to a portion of the printing plate 7 having no pattern is left.

  Next, pre-inking II operation is designated on the display, and pre-inking II is performed. In this pre-inking II, the ink fountain keys 4-1 to 4-n and the ink fountain roller 3 are preset to values corresponding to the design of the new printing plate 7 ', and the machine is operated to make ink ink The call roller 5 is called a predetermined number of times, and the ink film thickness distribution Ma corresponding to the pattern of the new printing plate 7 'is changed to the minimum ink film thickness distribution Ma required during printing remaining in the ink roller group 6. Mb (see FIG. 46B) is superimposed.

[Pre-inking I]
In addition, in the ink film thickness control method described in Patent Document 1, when the ink roller group 6 does not have ink, for example, when the printing plate 7 is set on the plate cylinder 8 for the first time, the plane is printed on the display. Specifies King I operation.

  In this pre-inking I, the opening amount of the ink fountain keys 4-1 to 4-n is set to a predetermined opening amount (for example, 50%), and the rotation amount of the ink fountain roller 3 is set to a predetermined rotation amount (for example, 50%). In addition, the machine is operated and the ink call roller 5 is called a predetermined number of times, so that the minimum ink film thickness distribution Ma required during printing as shown in FIG. 6 (first step of pre-inking I).

  Thereafter, the opening amount of the ink fountain keys 4-1 to 4-n and the rotation amount of the ink fountain roller 3 are preset to values corresponding to the pattern of the printing plate 7, and the ink calling roller 5 is called a predetermined number of times, An ink film thickness distribution Mb (FIG. 46B) corresponding to the pattern of the printing plate 7 is superimposed on the minimum ink film thickness distribution Ma required during printing formed on the ink roller group 6 (plain). King I second step).

[Return + Planking I]
In the ink film thickness control method described in Patent Document 2, when the old printing plate 7 is replaced with the new printing plate 7 ', the opening amount of the ink fountain keys 4-1 to 4-n is set to zero, and in this state The ink calling roller 5 is called a predetermined number of times, and all the ink on the ink roller group 6 is returned into the ink fountain 1 (turned back). As a result, each roller in the ink roller group 6 does not hold ink.

  Next, the opening degree of the ink fountain keys 4-1 to 4-n is set to a predetermined opening degree (for example, 50%), and the rotation amount of the ink fountain roller 3 is set to a predetermined amount (for example, 50%). The calling roller 5 is called a predetermined number of times to form the minimum ink film thickness distribution Ma (see FIG. 46A) required during printing in the ink roller group 6 (first step of pre-inking I). .

  Then, the opening degree of the ink fountain keys 4-1 to 4-n and the rotation amount of the ink fountain roller 3 are set to values corresponding to the pattern of the new printing plate 7 ', the machine is operated, and the ink calling roller 5 is turned on. The ink film thickness distribution Mb (FIG. 46) corresponding to the pattern of the new printing plate 7 ′ is made to the minimum ink film thickness distribution Ma required during the printing formed on the ink roller group 6 by calling up a predetermined number of times. (Refer to (b)) (second step of pre-inking I).

  In the ink film thickness control method described in Patent Documents 1 and 2, the ink roller group 6 is formed by a method such as “ink removing + preinking II”, “preinking I”, “turning + preinking I”, or the like. After the ink film thickness distribution corresponding to the pattern of the printing plate 7 is formed, a predetermined number of trial printings are performed, the printing machine is stopped once, and the printed material is printed by the operator from the paper discharge unit of the printing machine. The extracted printed matter is transported to an operation desk provided with an off-line self-propelled densitometer, and the density of each color patch of the color bar of the printed matter is measured with the self-propelled densitometer.

  If the density value of each color patch of the printed material is within the allowable range (the difference from the reference density value determined for each color is within the allowable value), the operator determines that there is no problem and operates the printing machine again. Start and move to final printing. If even one density value of each color patch of the printed material is not within the allowable range, the operator determines that there is a problem, and uses the preinking (+) or preinking (-) to distribute the ink film thickness in the ink supply device. , Perform a predetermined number of trial prints again, measure the density of the printed matter with a self-propelled densitometer, and then check the ink in the ink supply device until the density of the printed matter is no problem. Repeat the adjustment of the film thickness distribution.

  FIG. 47 shows an operation desk provided with an off-line self-propelled densitometer. The operation desk 10 is disposed behind the paper discharge unit of the printing press. A personal computer 11, a self-propelled densitometer 12, a monitor 13 and the like are installed on the desk top surface of the operation desk 10, and a print quality management device (PDC) 14 is configured by these.

Japanese Patent Laid-Open No. 10-16193 Japanese Patent Laid-Open No. 11-188844 Japanese Patent Application No. 2010-211846 Japanese Patent Application No. 2011-198387 JP 58-201008 A JP 58-201010 A

  However, in the above-described ink film thickness control method, even if there is no problem in the density of the printed material that has been trial printed, the printing machine is temporarily stopped, printing is started again, and the main printing is started. There is a problem in that about 20 sheets need to be printed until the printed matter is stabilized, and an extra amount of waste paper is generated accordingly, resulting in waste of printing materials.

  In addition, a densitometer or spectrophotometer that measures the density of the printed material is installed in the printing machine, and the density value of each color patch of the color bar of the printed material being tested is measured. If there is no problem, the printing machine is not stopped. It is conceivable to perform the final printing as it is. However, the densitometer or the spectrophotometer is expensive, and if it is provided in the delivery part by the number of color patches, there is a problem that a very large capital investment is required.

  The present invention has been made to solve such a problem, and the object of the present invention is to eliminate the waste of printing materials during the transition from the trial printing to the main printing without making a large capital investment. It is an object of the present invention to provide a control device and a control method for a printing press capable of performing the above.

  In order to achieve such an object, the present invention provides an ink presetting means for forming an ink film thickness distribution corresponding to a pattern of a printing plate mounted on a plate cylinder in the ink supply device, and a printing plate in the ink supply device. In a control device of a printing press provided with a trial printing means that performs a predetermined number of printings as a trial printing before starting the main printing in a state where the ink film thickness distribution according to the pattern is formed, Density measuring means for measuring the density value of the printed matter printed by the printing machine, imaging means for imaging the printed matter printed by the printing press, and printed matter printed using the first printing material imaged by the imaging means Conversion for obtaining a conversion relationship for converting a color measurement value into a density value from the color measurement value obtained from the captured image and the density value of a printed matter printed using the first printing material measured by the density measurement means Relationship A color measurement value obtained from a captured image of a printed material printed using a second printing material different from the first printing material imaged by the fixing device and the first printing material imaged by the imaging device, and the first measured by the density measuring device. The correction value determining means for obtaining a correction value for the conversion relation from the density value of the printed matter printed using the printing material 2 and the conversion relation obtained by the conversion relation determining means, and a second printing by the trial printing means. The printed matter that is printed using the same printing material as the printing material is used as the measurement target printed matter, and the color measurement value obtained from the captured image of the measurement target printed matter taken during transportation in the printing machine by the imaging means is converted. It is converted into a density value using the conversion relationship obtained by the determining means and the correction value obtained by the correction value determining means, and whether or not the converted density value of the printed matter to be measured is within an allowable range. And Ekku, characterized in that it comprises a present printing shifting unit for shifting the final printing allowed to continue printing of the printed material by test printing unit when there within the acceptable range.

  In the present invention, a color measurement value obtained from a captured image of a printed matter printed using the first printing material, and a density value measured from the printed matter printed using the first printing material, the color A conversion relationship for converting the measured value into the density value is obtained. For example, first, in the preparation stage, a printed matter is printed on which there are color patches of various densities, the density value of which is intentionally high at the center and low at both ends. The density of each color patch is obtained by measuring the density of the color with a self-propelled densitometer, and each color patch of the printed matter printed in the same state is also installed in the printing machine. The RGB value obtained by imaging with the inspection camera is obtained, and the RGB value captured by the inspection camera is converted from the obtained RGB value and the density value measured with the self-propelled densitometer into the density value measured with the self-propelled densitometer. Find the conversion formula.

  Moreover, in this invention, the color measurement value obtained from the picked-up image of the printed matter printed using the 2nd printing material different from a 1st printing material, and the printed matter printed using the 2nd printing material A correction value for the conversion relationship is obtained from the density value measured from the above and the conversion relationship obtained from the printed matter printed using the first printing material.

  In the present invention, for example, if the 20th printed material that has been trial printed using the same printing material as the second printing material is a printed material to be measured, the measuring object that is imaged during conveyance in the printing press by the imaging means The color measurement value obtained from the captured image of the printed material is the conversion relationship obtained from the printed material printed using the first printing material and the conversion obtained from the printed material printed using the second printing material. It is converted into a density value using a correction value for the relationship, and it is checked whether or not the converted density value of the printed matter to be measured is within an allowable range. Here, if the density value of the printed material to be measured is within the allowable range, the main printing is performed without stopping the printing press. This automatically shifts from the trial printing to the main printing.

  In the present invention, if the density value of the printed material to be measured is within the allowable range, the printing of the printed material by the trial printing means is continued as it is to shift to the main printing, but the density value of the printed material to be measured is acceptable. If the ink film thickness distribution is not within the range, the ink film thickness distribution formed by the ink presetting means is adjusted, and the printed matter printed by the trial printing means in a state in which the ink film thickness distribution is adjusted is the next printed matter to be measured. It is preferable to repeatedly check whether or not the density value of the printed material to be measured is within the allowable range. In this way, the ink film thickness distribution is automatically adjusted during the trial printing, and automatically shifts from the trial printing to the final printing when the density value of the printed material to be measured falls within the allowable range. Will be.

According to the present invention, the density value of the printed matter that has been trial printed is checked during conveyance in the printing press, and if it is within the allowable range, the final printing is performed without stopping the printing press. Thus, the printing material is automatically shifted to printing, and it is possible to eliminate waste of printing materials when shifting from the trial printing to the main printing. In addition, it is possible to reduce capital investment by using an inexpensive inspection camera instead of using many expensive densitometers.
In addition, according to the present invention, when a printed matter that is proof printed using the same printing material as the second printing material is used as the measurement target printed matter, the color measurement value obtained from the captured image of the measurement target printed matter is the first. Since it is converted into a density value by using a correction value for the conversion relationship obtained from the printed matter printed using the first printing material and the conversion relationship obtained from the printed matter printed using the second printing material. When the printing material is changed, it is not necessary to obtain a new conversion relationship and store it, so that a large storage capacity is not required and the problem of expensive equipment can be avoided.

1 is a diagram showing an outline of a sheet-fed rotary printing press using an embodiment (print job switching control device) of a printing press control device according to the present invention. FIG. It is a figure which shows the density distribution of each color patch of the printed matter (printed matter printed using the reference | standard printing material (1st printing material)) printed by shifting the supply amount of an ink on purpose. It is an image figure which shows a mode that the optimal curve is calculated | required by plotting the density value of each color patch measured with the self-propelled densitometer, and the RGB value of each color patch obtained from the captured image imaged with the inspection camera. FIG. 10 is a plan view showing a printed matter (printed matter printed using the same printing material as a reference printing material) of the 20th printed sheet (measurement start number) of print job A as a trial print. It is a top view which shows the printed matter of the next printing job A trial-printed in the state in which the ink film thickness distribution was adjusted. It is a figure which shows the printed matter of the printing job B printed using the printing material (2nd printing material) of a kind different from preparation. It is an image figure which shows the correction value ((DELTA) RGB value) of the color patch calculated | required so that the density | concentration value of the measured color patch and the RGB value point of the color patch obtained from the captured image may pass. FIG. 10 is a plan view showing a printed matter of a print job C of the 20th sheet (measurement start number) (printed matter printed using the same printing material as that of print job B) as a test print. It is a top view which shows the printed matter of the next print job C trial-printed in the state in which the ink film thickness distribution was adjusted. It is a block diagram of a print job switching control device used in this sheet-fed rotary printing press. FIG. 3 is a diagram illustrating divided contents of a memory in the print job switching control apparatus. FIG. 3 is a diagram illustrating divided contents of a memory in the print job switching control apparatus. FIG. 3 is a diagram illustrating divided contents of a memory in the print job switching control apparatus. FIG. 4 is a side view showing an installation state of a colorimeter in the print job switching control device. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. 3 is a flowchart illustrating processing operations of the print job switching control apparatus. It is a block diagram which shows the outline of the internal structure of the ink fountain roller drive control apparatus. It is a flowchart which shows the processing operation of the ink fountain roller drive control apparatus. It is a block diagram which shows the outline of the internal structure of the ink fountain key drive control apparatus. It is a flowchart which shows the processing operation of the ink fountain key drive control apparatus. It is a flowchart which shows the processing operation of the ink fountain key drive control apparatus. It is a figure which shows the principal part of the ink supply apparatus in the printing unit of each color in a printing machine. It is a top view which shows the printed matter printed by the printing machine. It is a figure which shows ink film thickness distribution Ma and Mb formed on the ink roller group of an ink supply apparatus. It is a figure which shows the operation desk provided with the offline self-propelled concentration meter.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing an outline of a four-color sheet-fed rotary printing press using an embodiment of a control device for a printing press according to the present invention. In the figure, reference numerals 15-1 to 15-4 denote printing units of respective colors, and the ink supply devices shown in FIG. 44 are provided in the printing units 15-1 to 15-4.

  Reference numeral 16 denotes a paper feed unit, 17 denotes a paper discharge unit, and 18 denotes a driving motor of the printing press. A print quality control device (PDC) whose schematic configuration is shown in FIG. 14 is provided.

  Further, in FIG. 1, only the first color printing unit 15-1 and the fourth color printing unit 15-4 are shown, and the second color printing unit 15-2 and the third color printing unit 15- are shown. 3 is omitted.

  This printing machine is provided with a print job switching control device 19 as an embodiment of the control device according to the present invention. Further, at the end of the conveyance path of the printing paper from the paper feeding unit 16 to the paper discharge unit 17 indicated by an arrow in the drawing, that is, the printed matter printed by the printing units 15-1 to 15-4 to the paper discharge unit 17. An inspection camera 20 is provided in the paper discharge path as one of the components of the print job switching control device 19. The inspection camera 20 images the printed matter immediately after being printed by the printing units 15-1 to 15-4 during conveyance.

  In this embodiment, an inspection camera (CCD camera) of a print quality inspection apparatus (PQA) installed as another apparatus in the printing press is used as the inspection camera 20. The print quality inspection apparatus (PQA) is an apparatus that inspects the print quality of a pattern printed on a printed material during printing, and details thereof are described in Patent Document 3 previously proposed by the present applicant. When a print quality inspection apparatus (PQA) is not installed, a dedicated inspection camera may be provided.

  The print job switching control device 19 is realized by hardware including a processor and a storage device, and a program that realizes various functions as a control device in cooperation with these hardware. A pre-inking function (ink preset function) for forming an ink film thickness distribution according to the pattern of the printing plate in the ink supply device and an ink film thickness distribution corresponding to the pattern of the printing plate were formed in the ink supply device. A trial printing function that performs a predetermined number of prints in a state as a trial printing, a main printing transition function that automatically shifts from a trial printing to a main printing when the density value of each color of the printed material is within an allowable range, Conversion formula determination function for obtaining a conversion formula for converting a color measurement value of a printed matter into a density value, and a correction value determination device for obtaining a correction value for the conversion formula for converting the color measurement value of the printed matter into a density value It is equipped with a door.

[Schematic operation of the print job switching control device]
[Preparation = printing using standard printing materials (paper and ink)]
[Conversion formula determination function]
As a preparatory step, first, the standard printing materials (paper and ink) were deliberately shifted so that the density of the color patch at the center of the color bar was high and the density of the color patch at both ends was low. Use to print the printed matter. FIG. 2A shows a printed matter printed using this reference printing material (first printing material) as 9P, and FIG. 2B shows the density distribution of each color patch 9a in the printed matter 9P.

  In this example, the density of the color patch 9a at the center of the color bar 9-2 is high and the density of the color patch 9a at both ends is low. However, there are color patches of various densities. For example, the printed material may be printed with the ink supply amount deliberately shifted so that the density increases from one end to the other end.

  The operator carries the printed material 9P to the operation desk 10 and measures the density of each color patch 9a with the self-propelled densitometer 12. The density value D of each color patch 9a is sent to the print job switching control device 19.

  The print job switching control device 19 images the color bar 9-2 of the printed material 9P ′ printed in the same state as the printed material 9P with the inspection camera 20, and the RGB value (color measurement value) of each color patch 9a from the captured image. )

Then, the print job switching control device 19 uses the conversion formula determination function to set each color patch 9a obtained from the density value of each color patch 9a measured by the self-propelled densitometer 12 and the captured image taken by the inspection camera 20. (See Fig. 3), find an optimal curve using the least squares method, and apply the calculated curve to Lambert-Beer's law (→ D = log ₁₀ f (RGB value)) Equation f (RGB value) is obtained. Then, using this obtained formula f (RGB value), a conversion formula (D = log ₁₀ f (RGB value)) for each color from RGB values to density values is obtained and stored as a reference conversion formula for each color.

In this case, the R value of the RGB value corresponds to the density value of cyan, the G value corresponds to the density value of magenta, the B value corresponds to the density value of yellow, and the R value + G value + B value corresponds to the density value of black. The reference conversion formula (D = log10f (RGB value)) is obtained as a formula for each color. Here, D = log ₁₀ f (RGB value) is represented as a representative for each color.

[Print Job A = When printing using the same type of printing materials (paper and ink) as in preparation]
[Pre-inking function]
When printing the next print job A using the same type of printing material as the preparation (standard printing material (first printing material)), the print job switching control device 19 uses the pre-inking function to print the print job An ink film thickness distribution corresponding to the pattern of the printing plate A is formed in the ink supply device of each printing unit 15.

  In this case, the print job switching control device 19 uses the above-described methods such as “ink removing + preinking II”, “preinking I”, “turn-up + preinking I”, etc. An ink film thickness distribution corresponding to the pattern of the printing plate of print job A is formed therein.

  As another method, in FIG. 44, the ink roller group 6 can be divided into an upstream roller group and a downstream roller group, and the ink roller group in the ink supply apparatus after the previous print job is completed. 6 is removed, the ink calling roller 5 is stopped, and the ink roller group 6 is divided into an upstream roller small group and a downstream roller small group. After the ink in the upstream small roller group is removed by the ink cleaning device, the ink roller group 6 is connected, re-divided, and re-connected, so that the ink corresponding to the pattern of the printing plate of the next printing job A A film thickness distribution may be formed on the ink roller group 6.

  Details of this technique are described in Patent Document 4 previously proposed by the applicant of the present invention, and a detailed description thereof will be omitted here. By adopting such a technique, it is possible to form the ink film thickness distribution of the next print job A in the ink roller group 6 in a short time without performing blank paper printing or turning over. .

[Trial printing function]
Next, the print job switching control device 19 prints a predetermined number of prints (for example, in a state where the ink film thickness distribution of the print job A is formed in the ink supply device of each printing unit 15 by the trial printing function. 20 to 100) is performed as a trial print.

[Full-print transfer function]
The print job switching control device 19 sets the 20th printed sheet (measurement start number) printed as a test print as the print 9A ₁ to be measured (see FIG. 4), and the color bar 9-2 of the print 9A _{1 to be} measured. Is imaged by the inspection camera 20, and the RGB value of each color patch 9a is obtained.

  Then, the print job switching control device 19 uses the reference conversion formula (D = log10f (RGB value)) of each color obtained by the conversion formula determination function to convert the RGB value of each color patch 9a into the density value of each color patch. A density difference ΔD1 between the converted density value D1 of each color batch 9a and a reference density value determined for each color is obtained. If all the density differences ΔD1 are within an allowable value, It is determined that the density value is within the allowable range, and printing of the print job A is continued as it is without stopping printing, and the process proceeds to the main printing.

On the other hand, if the converted density value D1 of each color batch 9a has a density difference ΔD1 with respect to the reference density value of each color exceeding the allowable value, the print job switching control device 19 performs the ink film thickness distribution. The printed product 9A that has been trial-printed in a state in which the ink film thickness distribution is adjusted is designated as the next printed product 9A ₂ (see FIG. 5), and each color patch 9a of the measured printed product 9A ₂ It is checked whether or not the density value D1 is within an allowable range.

Here, the density value D1 of each color patch 9a of the measurement object printout 9A ₂ is if in all allowable range, without stopping the printing, the process proceeds to final printing to leave the printing of printed matter of the print job A However, if even one of them is not within the permissible range, the ink film thickness distribution is adjusted, and the printed material 9A that has been trial-printed in a state in which the ink film thickness distribution is adjusted is set as the next printed material. The check is repeated as to whether or not the density value D1 of each color patch 9a of the printed product 9A is within the allowable range.

  During the repetition of this operation, when the printed material 9A to be measured has reached the measurement end number (80 sheets), the print job switching control device 19 stops printing.

  Thus, after starting the trial printing, the 20th printed material 9A is the first printed material to be measured, and the density value of each color patch 9a is reached until the measured printed material 9A reaches 80 sheets. If it is confirmed that all of D1 are within the allowable range, the transition from the trial printing of the printed matter of the print job A to the main printing is automatically performed from that point.

[Print Job B = When printing using a different type of printing material (paper and ink) than preparation]
[Correction value determination function]
Next, the next print job B is printed using a different type of printing material from the preparation (second printing material). In this case, the operator carries the printed matter 9B (see FIG. 6) obtained by printing the print job B to the operation desk 10 and measures the density of each color patch 9a with the self-propelled densitometer 12. The density value D2 of each color patch 9a is sent to the print job switching control device 19.

  The print job switching control device 19 images the color bar 9-2 of the printed material 9B ′ printed in the same state as the printed material 9B with the inspection camera 20, and uses the RGB image (color measurement value) of each color patch 9a from the captured image. )

Then, the print job switching control device 19 uses the correction value determination function to set each color patch obtained from the density value D2 of each color patch 9a measured by the self-propelled densitometer 12 and the captured image captured by the inspection camera 20. The correction value (ΔRGB value) of each color patch for correcting the reference conversion formula (D = log ₁₀ f (RGB value)) is obtained so as to pass through the RGB value point 9a (see FIG. 7). Then, the obtained correction value (ΔRGB value) of each color patch is stored as a correction value when the printing material (second printing material) of print job B is used.

[Print job C = when printing is performed using the same type of printing material (paper and ink) as print job B]
[Pre-inking function]
When the next print job C is printed using the same type of print material as the print job B (second print material), the print job switching control device 19 uses the pre-inking function to print the plate of the print job C. The ink film thickness distribution corresponding to the pattern is formed in the ink supply device of each printing unit 15.

[Trial printing function]
Next, the print job switching control device 19 prints a predetermined number of prints (for example, in a state where the ink film thickness distribution of the print job C is formed in the ink supply device of each printing unit 15 by the trial printing function. 20 to 100) is performed as a trial print.

[Full-print transfer function]
The print job switching control device 19 sets the 20th printed sheet (measurement start number) printed as a test print as the print 9C ₁ to be measured (see FIG. 8), and the color bar 9-2 of the print 9C _{1 to be} measured. Is imaged by the inspection camera 20, and the RGB value of each color patch 9a is obtained.

  The print job switching control device 19 then converts the reference conversion formula (D = log10f (RGB value)) of each color obtained by the conversion formula determination function and the correction value (ΔRGB value) of each color patch obtained by the correction value determination function. Is used to convert the RGB value of each color patch 9a into the density value D3 of each color patch, and the density difference D3 of the converted density value D3 of each color batch 9a with the reference density value determined for each color. If the density difference ΔD3 is all within the allowable value, it is determined that the density value of each color is within the allowable range, and printing of the print job C is continued without stopping printing. Transition to printing.

On the other hand, if the converted density value D3 of each color batch 9a includes a density difference ΔD3 with respect to the reference density value of each color exceeding the allowable value, the print job switching control device 19 performs the ink film thickness distribution. The printed product 9C that has been trial printed with the ink film thickness distribution adjusted is used as the next printed product 9C ₂ (see FIG. 9), and each color patch 9a of the measured printed product 9C ₂ It is checked whether or not the density value D3 is within an allowable range.

Here, the density value D3 of each color patch 9a of the measurement object printout 9C ₂ is if in all allowable range, without stopping the printing, the process proceeds to final printing to leave the printing of printed matter of the print job C However, if even one of them is not within the permissible range, the ink film thickness distribution is adjusted, and the printed material 9C that has been trial printed in a state in which the ink film thickness distribution is adjusted is used as the next measurement object. The check of whether the density value D3 of each color patch 9a of the printed product 9C is within the allowable range is repeated.

  During the repetition of this operation, when the printed material 9C to be measured reaches the number of measurement completion sheets (80 sheets), the print job switching control device 19 stops printing.

  Thus, after the start of the trial printing, the 20th printed material 9C is set as the first printed material to be measured, and the density value of each color patch 9a is reached until the measured printed material 9C reaches 80 sheets. If it is confirmed that all of D3 is within the allowable range, the transition from the trial printing of the printed matter of the print job C to the main printing is automatically performed from that point.

  When printing using a printing material of a different type from the preparation (second printing material), the previously stored reference conversion formula (D = log10f (RGB value)) cannot be used, and a new conversion formula is obtained and stored. Will have to do. In this case, the reference conversion formula (D = log10f (RGB value)) is complicated, requires a large storage capacity, and the equipment becomes expensive.

  Therefore, in this embodiment, instead of obtaining and storing the reference conversion formula every time the printing material changes, the problem is solved by storing only the correction value (ΔRGB value) for correcting the reference conversion formula. To solve.

The outline of the operations of “preparation”, “print job A”, “print job B”, and “print job C” will be described below.
[Preparation = printing using standard printing materials (paper and ink)]
(1) The printed matter is printed by intentionally shifting the ink supply amount so that the density of the color patch at the center of the color bar is high and the density of the color patch at both ends is low.
(2) Measure the density of each color patch in the color bar of the printed matter with a self-propelled densitometer.
(3) Printing is performed in the state of (1), and the color bar of the printed matter is imaged with an inspection camera, and the RGB value of each color patch is obtained. Note that (2) and (3) may be reversed, and after obtaining RGB values of each color patch of the printed matter with an inspection camera, the density of each color patch of the printed matter may be measured. That is, the printed matter for measuring the density and the printed matter for measuring the RGB value may be the same.
(4) Plot the density value of each color patch measured with a self-propelled densitometer and the RGB value of each color patch obtained from the image captured by the inspection camera, and use the least squares method to obtain the optimal curve And the obtained curve is applied to the Lambert-Beer law (→ D = log ₁₀ f (RGB value)) to obtain the expression f (RGB value).
(5) Using the formula f (RGB value) obtained in (4), a conversion formula for each color from RGB values to density values (D = log ₁₀ f (RGB value)) is obtained and used as a reference conversion formula for each color. Remember.

[Print Job A = When printing using the same type of printing materials (paper and ink) as in preparation]
(6) With the pre-inking function, the ink film thickness distribution of print job A is formed, and the printed matter is printed (trial printing).
(7) The printed matter printed on the 20th sheet (measurement start number) is used as a measurement object, and the color bar of the measurement object is imaged with an inspection camera to obtain the RGB value of each color patch.
(8) Using the reference conversion formula (D = log10f (RGB value)) stored in (5), the RGB value of each color patch obtained in (7) is used as the density value of each color patch. Convert.
(9) If the density value of each color patch converted in (8) is within the allowable range, skip to (13), and if it is not within the allowable range, adjust the ink film thickness distribution.
(10) The printed matter that has been trial printed with the ink film thickness distribution adjusted is used as the next measurement target print, and the color bar of the measurement target print is imaged with an inspection camera to obtain the RGB value of each color patch. .
(11) Using the reference conversion formula (D = log10f (RGB value)) stored in (5), the RGB value of each color patch obtained in (10) is converted into the density value of each color patch. Convert.
(12) If the density value of each color patch converted in (11) is within the allowable range, skip to (13), and if not within the allowable range, adjust the ink film thickness distribution and return to (10). However, if (10) and (11) are repeated and the number of printed materials to be measured reaches the measurement end number (80), printing is stopped.
(13) The main print of print job A is performed.

[Print Job B = When printing using a different type of printing material (paper and ink) than preparation]
(14) The pre-inking function forms the ink film thickness distribution of the print job B and prints the printed matter.
(15) Measure the density of each color patch in the color bar of the printed matter with a self-propelled densitometer.
(16) Printing is performed in the state of (14), and the color bar of the printed matter is imaged with an inspection camera, and the RGB value of each color patch is obtained.
(17) A reference conversion formula (D =) so that the density value of each color patch measured by the self-propelled densitometer and the RGB value point of each color patch obtained from the captured image captured by the inspection camera pass. A correction value (ΔRGB value) of each color patch for correcting log ₁₀ f (RGB value)) is obtained.
(18) The correction value (ΔRGB value) of each color patch obtained in (17) is stored as a correction value when the printing material for print job B is used.

[Print job C = when printing is performed using the same type of printing material (paper and ink) as print job B]
(19) The ink film thickness distribution of the print job C is formed by the pre-inking function, and the printed matter is printed (trial printing).
(20) The printed matter printed on the 20th sheet (the number of measurement start sheets) is taken as the printed matter to be measured, and the color bar of the printed matter to be measured is picked up by the inspection camera to obtain the RGB value of each color patch.
(21) Using the standard conversion formula (D = log10f (RGB value)) stored in (5) and the correction value (ΔRGB value) of each color patch stored in (18), the value is obtained in (20). The RGB value of each color patch thus obtained is converted into a density value of each color patch.
(22) If the density value of each color patch converted in (21) is within the allowable range, skip to (26), and if it is not within the allowable range, adjust the ink film thickness distribution.
(23) A printed matter that has been trial-printed in a state where the ink film thickness distribution is adjusted is taken as a printed matter to be measured next, and a color bar of the printed matter to be measured is imaged with an inspection camera to obtain an RGB value of each color patch. .
(24) Using the standard conversion formula (D = log10f (RGB value)) stored in (5) and the correction value (ΔRGB value) of each color patch stored in (18), the value is obtained in (23). The RGB value of each color patch thus obtained is converted into a density value of each color patch.
(25) If the density value of each color patch converted in (24) is within the allowable range, skip to (26), and if not within the allowable range, adjust the ink film thickness distribution and return to (23). However, if (23) and (24) are repeated and the number of prints to be measured reaches the measurement end number (80), printing is stopped.
(26) The main print of the print job C is performed.

  FIG. 10 shows a block diagram of the print job switching control device 19. The print job switching control device 19 includes a CPU 19A, a RAM 19B, a ROM 19C, a print start switch SW1, a print stop switch SW2, a conversion calculation switch SW3, an ink removal switch SW4, a print job switch start switch SW5, a correction value calculation switch SW6. An input device 19D, a display 19E, an output device 19F, and a memory 19G are provided.

  Also, a PQA inspection camera 20 (FIG. 1), an A / D converter 19I, a driving motor driver 19K, a driving motor rotary encoder 19L, a rotary phase detection counter 19M of a printing press, a D / A converter 19N, and a printing press Origin position detector 19P, printing machine rotation count counter 19Q, colorimeter 19R, colorimeter moving motor 19S, colorimeter moving motor driver 19T, colorimeter moving motor rotary encoder 19U, Current color measurement counter 19V, colorimeter origin position detector 19W, A / D converter 19X, D / A converter 19Y, paper type setter 19Z1, ink type setter 19Z2 and input / output Interfaces (I / O, I / F) 19-1 to 19-13 are provided.

  The CPU 19A obtains various input information given through the interfaces 19-1 to 19-12, and operates according to a program stored in the ROM 19C while accessing the RAM 19B and the memory 19G.

  In FIG. 10, 15 is a printing unit (FIG. 1), 18 is a driving motor of the printing press (FIG. 1), 21 is an ink calling device, 22 is a paper feeding device, 23 is a control device for driving an ink fountain roller, 24 (24-1 to 24-n) are ink fountain key drive control devices.

  The ink calling device 21 is provided for each color corresponding to the ink calling roller 5 (FIG. 44) of the printing unit 15 for each color. The ink fountain roller driving control device 23 is provided for each color corresponding to the ink fountain roller 3 (FIG. 44) of the printing unit 15 of each color. The ink fountain key drive control device 24 (24-1 to 24-n) is provided for each color corresponding to each ink fountain key 4 (4-1 to 4-n) (FIG. 44) of the printing unit 15 of each color. It has been. The paper feeder 22 is provided corresponding to the paper feeder 16 (FIG. 1).

  The drive motor rotary encoder 19L generates a clock pulse at every predetermined rotation speed (angle) of the drive motor 18 of the printing press and outputs the clock pulse to the drive motor driver 19K and the rotation phase detection counter 19M of the printing press. Each time the origin position detector 19P of the printing press detects the origin position of the printing press, it outputs the origin position detection signal to the rotation phase detection counter 19M of the printing press and the rotation count counter 19Q of the printing press.

  In FIG. 10, only one color is shown for the printing unit 15, the ink calling device 21, the ink fountain roller drive control device 23, and the ink fountain key drive control device 24 (24-1 to 24-n). Absent.

  The contents of the memory 19G are divided and shown in FIGS. The memory 19G is provided with memories M1 to M35. The memory M1 stores the printing speed of the printing press. A count value N is stored in the memory M2. The memory M3 stores the count value of the current position measurement counter of the colorimeter. The memory M4 stores the current position of the colorimeter. The memory M5 stores the position of each color patch to be measured by the colorimeter. The memory M6 stores color data obtained from the colorimeter.

  The memory M7 stores the total number n of ink fountain keys of each printing unit. The memory M8 stores the count value of the rotation phase detection counter of the printing press. The memory M9 stores the rotational phase of the printing press at the time of printing the printed matter. The memory M10 stores RGB values captured by the inspection camera. The memory M11 stores the density value of each color patch. The memory 12 stores the imaging position of each color patch. The memory M13 stores the RGB values of each color patch. The memory M14 stores the corresponding density value-RGB value. The memory M15 stores a conversion formula from RGB values to density values (standard conversion formula for each color).

  The memory M16 stores the count value of the counter for counting the number of rotations of the printing press. The memory M17 stores the number of rotations during ink removal for each color. The memory M18 stores a pattern area ratio in a range corresponding to each ink fountain key of each color (a pattern area ratio for each zone corresponding to each ink fountain key of each printing plate set in each printing unit).

  The memory M19 stores a pattern area ratio-ink fountain key opening amount conversion table for each color indicating the relationship between the pattern area ratio and the ink fountain key opening amount. The memory M20 stores the opening amount of each ink fountain key of each printing unit. The memory M21 stores the rotational speed of the printing press during pre-inking. The memory M22 stores the rotation amount of the ink fountain roller of each printing unit. The memory M23 stores the number of ink calls (preliminary printing speed conversion) during pre-inking II for each color.

  The memory M24 stores the number of measurement start sheets at the time of trial printing (20 sheets (converted to the rotation speed of the printing press)). In the memory M25, the number of measurement completions at the time of trial printing (80 sheets (converted with the rotation speed of the printing press)) is stored. The memory M26 stores a flag value for determining the start of actual printing. The memory M27 stores a reference density value for each color. The memory M28 stores a difference (density difference) between the density value of each color patch of each color and the reference density value of each color. The memory M29 stores an allowable value of the density difference of each color. The memory M30 stores a correction value conversion table of the density difference of each color-the opening amount of the ink fountain key. The memory M31 stores a correction value for the opening amount of each ink fountain key of each printing unit. The memory M32 stores the paper type, the memory M33 stores the ink type, the memory M34 stores the correction value (ΔRGB value) of each color patch, and the memory M35 stores each of the printing materials corresponding to the printing material. Color patch correction values (ΔRGB values) are stored.

  The self-propelled densitometer 12 shown in FIG. 1 is one of the components of the print job switching control device 19 and includes a colorimeter 19R. As shown in FIG. 14, the colorimeter 19R is attached to a ball screw (feed screw) 25-3 provided between the support columns 25-1 and 25-2. The ball screw 25-3 is rotated forward / reversely by the calorimeter moving motor 19S. By the forward / reverse rotation of the ball screw 25-3, the colorimeter 19R moves between the columns 25-1 and 25-2 while being guided by the ball screw 25-3. The head portion 19R1 of the colorimeter 19R is directed to the surface 25-4a on which the measurement target of the measurement table 25-4 is placed.

[Detailed operation of print job switching control device]
Hereinafter, detailed operations of “preparation”, “print job B”, and “print job C” will be described with the functions of the print job switching control device 19. In the following, only the operation for one color is described for the sake of simplicity, but the same operation is performed for all colors.

[Preparation = printing using standard printing materials (paper and ink)]
[Conversion formula determination function]
[Printing of printed matter with different ink supply amounts]
When the print start switch SW1 is turned on (FIG. 15: YES in step S101), the CPU 19A of the print job switching control device 19 reads the printing speed from the memory M1 (step S102) and outputs it to the driving motor driver 19K (step S102). Step S103). In addition, a paper feed start command is output to the paper feeder 22 (step S104), and a print start command and an ink and swimsuit roller (not shown) landing command are output to the printing unit 15 (steps S105 and S106).

  As a result, the printing speed is set to the printing speed, and the printed amount of the printed matter is deliberately shifted so that the density of the color patch at the center of the color bar is high and the density of the color patch at both ends is low. Is started.

[Collecting color data]
When the printing of the printed material reaches a certain number, the operator pulls out one of the printed materials, carries it to the operation desk 10 provided with the self-propelled densitometer 12, and measures the measuring table 25-4 (FIG. 14) Set as a printed product 9P (FIG. 2) on top. In this set state, the color bar 9-2 of the printed product 9P is located on the lower surface of the head portion 19R1 of the colorimeter 19R.

  In this state, the operator turns on the conversion equation calculation switch SW3. When the conversion equation calculation switch SW3 is turned on (FIG. 16: YES in step S107), the CPU 19A sends a forward rotation command to the colorimeter movement motor driver 19T (step S108), and the colorimeter movement motor 19S. Rotate forward. The ball screw 25-3 is rotated forward by the normal rotation of the colorimeter moving motor 19S, and is guided by the ball screw 25-3 so that the colorimeter 19R is in contact with the column 25-1 from the origin position toward the column 25-2. Move.

  The CPU 19A sets the count value N of the memory M2 to 1 (step S109), reads the count value of the current position measurement counter 19V of the colorimeter (step S110), and based on the read count value, the current position of the colorimeter 19R. Is calculated (step S111), and when the current position reaches the first measurement position (N = 1 first measurement position) stored in the memory M5 (YES in step S114), the current position is located at the measurement position. The color data of the color patch 9a is collected by the colorimeter 19R (FIG. 17: Step S115), and the collected color data is stored in the Nth address position of the memory M6 (Step S116).

  Similarly, the CPU 19A counts up the count value in the memory M2, and every time the measurement position (Nth measurement position) stored in the memory M5 is reached, the color patch 9a positioned at the measurement position is reached. The color data is collected by the colorimeter 19R, and the collected color data is stored in the Nth address position of the memory M6 (repetition of steps S110 to S119).

  When completing the collection of the color data of all the patches 9a of the color bar 9-2 of the printed product 9P (YES in Step S119), the CPU 19A stops the forward rotation of the colorimeter moving motor 19S (Step S120). Next, the colorimeter moving motor 19S is reversely rotated (step S121), and after the colorimeter 19R is returned to the origin position (YES in step S122), the reverse rotation of the colorimeter moving motor 19S is stopped (step S122). Step S123).

[Measurement of RGB values]
Next, the CPU 19A reads the count value from the rotational phase detection counter 19M of the printing press (FIG. 18: step S124), reads the rotational phase of the printing press at the time of printing the printed matter from the memory M9 (step S125), and the two match. At that time (YES in step S126), an imaging command is output to the inspection camera 20 (step S127), and the RGB values of the captured image captured by the inspection camera 20 are stored in the memory M10 (step S128). As a result, the color bar 9-2 of the printed material 9P ′ (FIG. 2) printed in the same state as the printed material 9P is imaged, and the RGB value of each color patch 9a of the color bar 9-2 is stored in the memory M10. .

  After the measurement of the RGB values, the operator turns on the print stop switch SW2. When the print stop switch SW2 is turned on (YES in step S129), the CPU 19A outputs a paper feed stop command to the paper feed device 22 (step S130), and the print stop command and the ink and swim roller for the print unit 15 are output. A release command is output (steps S131 and S132), and a stop signal is output to the driving motor driver 19K (step S133). This stops the printing press.

[Determination of standard color conversion formula]
Next, the CPU 19A sets the count value N of the memory M2 to 1 (FIG. 19: step S134), reads the count value N from the memory M2 (step S135), and the Nth color patch from the Nth address position of the memory M6. Is read out (step S136), and the read density value of the Nth color patch is calculated and stored in the Nth address position of the memory M11 (step S137).

  Further, the imaging position of the Nth color patch is read from the Nth address position of the memory M12, and the RGB value of the Nth color patch is read from the address of the imaging position of the Nth color patch in the memory M10. Is stored in the Nth address position (step S139). Then, the density value of the Nth color patch and the RGB value of the Nth color patch are associated with each other and stored in the Nth address position of the memory M14 (step S140).

  Then, 1 is added to the count value N in the memory M2 (step S141), the total number n of ink fountain keys is read from the memory M7 (step S142), and the count value N exceeds the total number n of ink fountain keys (YES in step S143). , Steps S135 to S143 are repeated. As a result, the pair of the density value of the Nth color patch and the RGB value of the Nth color patch is stored in the memory M14.

  When the count value N exceeds the total number n of the ink fountain keys (YES in step S143), the CPU 19A uses the least square method to calculate the RGB value from the data (a pair of the density value and the RGB value) stored in the memory M14. A reference conversion formula (D = log10f (RGB value)) for each color is obtained as a conversion formula from the color to the density value and stored in the memory M15 (step S144).

[Print Job B = When printing using a different type of printing material (paper and ink) than preparation]
When printing the print job B, the CPU 19A of the print job switching control device 19 inputs the paper type from the paper type setting unit 19Z1 (FIG. 20: YES in step S145), and sets the input paper type. Store in the memory M32 (step S146). When the ink type is input from the ink type setting unit 19Z2 (YES in step S147), the input ink type is stored in the memory M33 (step S148).

  When the print start switch SW1 is turned on (YES in step S149), the printing speed is read from the memory M1 (step S150) and output to the driving motor driver 19K (step S151). Further, a paper feed start command is output to the paper feeder 22 (step S152), and a print start command and ink and swimsuit roller landing commands are output to the printing unit 15 (steps S153 and S154). As a result, the printing machine speed is set to the printing speed, and printing of the print job B is started.

[Collecting color data]
When the printing of the print job B reaches a certain number, the operator removes one of the printed products and carries it to the operation desk 10 provided with the self-propelled densitometer 12 to measure the measurement table 25-4. The printed material 9B (FIG. 6) is set on (FIG. 14). In this set state, the color bar 9-2 of the printed matter 9B is located on the lower surface of the head portion 19R1 of the colorimeter 19R.

  In this state, the operator turns on the correction value calculation switch SW6. When the correction value calculation switch SW6 is turned on (FIG. 21: YES in step S155), the CPU 19A sends a forward rotation command to the colorimeter movement motor driver 19T (step S156), and the colorimeter movement motor 19S. Rotate forward. The ball screw 25-3 is rotated forward by the normal rotation of the colorimeter moving motor 19S, and is guided by the ball screw 25-3 so that the colorimeter 19R is in contact with the column 25-1 from the origin position toward the column 25-2. Move.

  The CPU 19A sets the count value N of the memory M2 to 1 (step S157), reads the count value of the current position measurement counter 19V of the colorimeter (step S158), and reads the current position of the colorimeter 19R from the read count value. (Step S159), and when the current position reaches the first measurement position (N = 1st measurement position) stored in the memory M5 (YES in step S162), the current position is located at the measurement position. The color data of the color patch 9a is collected by the colorimeter 19R (FIG. 22: Step S163), and the collected color data is stored in the Nth address position of the memory M6 (Step S164).

  Similarly, the CPU 19A counts up the count value in the memory M2, and every time the measurement position (Nth measurement position) stored in the memory M5 is reached, the color patch 9a positioned at the measurement position is reached. Is collected by the colorimeter 19R, and the collected color data is stored in the Nth address position of the memory M6 (repetition of steps S158 to S167).

  When the CPU 19A completes the collection of the color data of all the patches 9a of the color bar 9-2 of the printed product 9B (YES in step S167), the CPU 19A stops the forward rotation of the colorimeter moving motor 19S (step S168). Next, the colorimeter moving motor 19S is reversely rotated (step S169), and after the colorimeter 19R is returned to the origin position (YES in step S170), the reverse rotation of the colorimeter moving motor 19S is stopped (step S170). Step S171).

[Measurement of RGB values]
Next, the CPU 19A reads the count value from the rotational phase detection counter 19M of the printing press (FIG. 23: step S172), reads the rotational phase of the printing press at the time of printing the printed matter from the memory M9 (step S173), and the two match. At that time (YES in step S174), an imaging command is output to the inspection camera 20 (step S175), and the RGB values of the captured image captured by the inspection camera 20 are stored in the memory M10 (step S176). As a result, the color bar 9-2 of the printed material 9B ′ (FIG. 6) printed in the same state as the printed material 9B is imaged, and the RGB values of the color patches 9a of the color bar 9-2 are stored in the memory M10. .

  After the measurement of the RGB values, the operator turns on the print stop switch SW2. When the print stop switch SW2 is turned on (YES in step S177), the CPU 19A outputs a paper feed stop command to the paper feed device 22 (step S178), and the print stop command and the ink and swim roller for the print unit 15 are output. A release command is output (steps S179 and S180), and a stop signal is output to the driving motor driver 19K (step S181). This stops the printing press.

[Calculation of correction value (ΔRGB value)]
Next, the CPU 19A sets the count value N of the memory M2 to 1 (FIG. 24: step S182), reads the count value N from the memory M2 (step S183), and the Nth color patch from the Nth address position of the memory M6. Is read (step S184), and the density value of the read Nth color patch is calculated and stored in the Nth address position of the memory M11 (step S185).

  Further, the imaging position of the Nth color patch is read from the Nth address position of the memory M12, and the RGB value of the Nth color patch is read from the address of the imaging position of the Nth color patch in the memory M10. Are stored in the Nth address position (step S187).

Then, the reference conversion formula (D = log ₁₀ f (RGB value)) is read from the memory M15 (FIG. 25: Step S188), and the density value point of the Nth color patch and the RGB value point of the Nth color patch are obtained. A correction value (ΔRGB value) for correcting the reference conversion formula (D = log ₁₀ f (RGB value)) is obtained so as to pass, and N in the memory M34 is obtained as a correction value (ΔRGB value) of the Nth color patch. It is stored in the th address position (step S189).

  Then, the paper type is read from the memory M32, the ink type is read from the memory M33, and the correction value (ΔRGB value) of the Nth color patch corresponding to the paper type and the ink type is associated with the memory M35. The correction value (ΔRGB value) of the Nth color patch corresponding to the printing material is stored in the Nth address position of the area (step S192).

  Then, 1 is added to the count value N in the memory M2 (step S193), the total number n of ink fountain keys is read from the memory M7 (step S194), and the count value N exceeds the total number n of ink fountain keys (YES in step S195). , Steps S183 to S195 are repeated. As a result, the correction value (ΔRGB value) of each color patch corresponding to the printing material of the print job B is stored in the memory M35.

  When the print start switch SW1 is turned on (FIG. 26: YES in step S196), the CPU 19A of the print job switching control device 19 reads the print speed from the memory M1 (step S197) and outputs it to the driving motor driver 19K (step S197). Step S198). Further, a paper feed start command is output to the paper feeder 22 (step S199), and a print start command and ink and swimsuit roller landing commands are output to the printing unit 15 (steps S200 and S201). Thereby, the speed of the printing press is set as the printing speed, and printing of the printed matter is started. Here, it is assumed that printing of the print job B is continued.

[Print job C = when printing is performed using the same type of printing material (paper and ink) as print job B]
[Pre-inking function]
[Ink removing]
Here, when the ink removing switch SW4 is turned on during the printing of the next print job C using the same type of printing material as the print job B (YES in step S202), the CPU 19A operates the ink calling device 21. A stop signal is output (step S203), and the ink calling operation of the ink calling roller 5 is stopped.

  Further, a reset signal and an enable signal are sent to the counter 19Q for counting the number of rotations of the printing press (FIG. 27: Step S204), the output of the reset signal is stopped (Step S205), and the counter 19Q for counting the number of rotations of the printing press Start counting from zero.

  The driving motor 18 of the printing machine continues to rotate even after the ink calling operation of the ink calling roller 5 is stopped, and continues to supply printing paper from the paper supply unit 16 to the printing machine. As a result, the printing unit 15 continues the blank page printing.

  During this blank printing, the CPU 19A reads the count value of the counter 19Q for counting the number of rotations of the printing press (step S206), and reads the number of rotations during ink removal stored in the memory M17 (step S207). If they match (YES in step S208), a paper feed stop command is output to the paper feeder 22 (step S209). In addition, a print stop command and an ink and swimsuit roller removal command are output to the printing unit 15 (steps S210 and S211), and a stop signal is output to the driving motor driver 19K (step S212).

  As a result, the ink in the ink supply device of the printing unit 15 is reduced, and the minimum ink film thickness distribution Ma (see FIG. a) see) is left.

[Input of pattern area ratio]

  When the portable memory is set in the input device 19D, that is, when the pattern area ratio in the range corresponding to the ink fountain keys 4-1 to 4-n of the printing plate of the print job C is input to the CPU 19A (FIG. 28: (YES in step S213), the count value N in the memory M2 is set to N = 1 (step S214), the count value N is read from the memory M2 (step S215), and the pattern area ratio in the range corresponding to the Nth ink fountain key is allowed. The data is read from the portable memory and stored in the address position for the Nth ink fountain key in the memory M18 (step S216).

  Then, 1 is added to the count value N in the memory M2 (step S217), the total number n of ink fountain keys is read from the memory M7 (step S218), and the count value N exceeds the total number n of ink fountain keys (YES in step S219). The processing operations in steps S215 to S219 are repeated. As a result, the pattern area ratio for each area of the printing plate of the print job C corresponding to the ink fountain keys 4-1 to 4-n is read from the portable memory and stored in the memory M18.

  In this embodiment, the measurement of the pattern area ratio in the range corresponding to the ink fountain keys 4-1 to 4-n of the printing plate of the print job C is shown in Patent Document 5 and Patent Document 6 by the present applicant. The pattern area ratio measured using this "pattern area ratio measuring device" is written in a portable memory, and the portable memory in which this pattern area ratio is written Is set in the input device 19D, the pattern area ratio in the range corresponding to the ink fountain keys 4-1 to 4-n of the printing plate of the print job C is input. The CPU 19A and the “pattern area ratio measuring device” are connected online, and the pattern area ratio in the range corresponding to the ink fountain keys 4-1 to 4-n of the printing plate of the print job C is directly connected from the “picture area ratio measuring device”. You may make it take in.

[Set of printing material types]
When printing the print job C, when the paper type is input from the paper type setting unit 19Z1 (FIG. 29: YES in step S220), the CPU 19A stores the input paper type in the memory M32 (step S20). S221). When the ink type is input from the ink type setting unit 19Z2 (YES in step S222), the input ink type is stored in the memory M33 (step S223).

[Set the opening of the ink fountain key]
When the print job switching start switch SW5 is turned on (YES in step S224), the CPU 19A sets the count value N in the memory M2 to N = 1 (FIG. 30: step S225), and reads the count value N from the memory M2. (Step S226) From the address position for the Nth ink fountain key in the memory M18, the pattern area ratio in the range corresponding to the Nth ink fountain key is read (step S227).

  Then, the pattern area ratio-ink fountain key opening amount conversion table in the memory M19 is read (step S228), and using this pattern area ratio-ink fountain key opening amount conversion table, the pattern area ratio in the range corresponding to the Nth ink fountain key is The opening amount of the Nth ink fountain key is obtained, the obtained opening amount of the Nth ink fountain key is stored in the address position for the Nth ink fountain key in the memory M20 (step S229), and the controller 24 for driving the Nth ink fountain key is used. (Step S230).

  Then, it is confirmed that the reception completion signal for the opening amount of the Nth ink fountain key has been transmitted from the Nth ink fountain key drive control device 24 (YES in step S231), and 1 is added to the count value N in the memory M2. In step S232, the total number n of ink fountain keys is read from the memory M7 (step S233), and the processing operations in steps S226 to S234 are repeated until the count value N exceeds the total number n of ink fountain keys (YES in step S234).

  Thereby, the opening amount of the ink fountain keys 4-1 to 4-n corresponding to the pattern area ratio in the range corresponding to the ink fountain keys 4-1 to 4-n of the printing plate of the print job C is obtained and stored in the memory M20. At the same time, it is transmitted to the ink fountain key control devices 24-1 to 24-n.

[Confirmation that the ink fountain key opening amount setting is complete]
Then, the CPU 19A sets the count value N in the memory M2 to N = 1 (FIG. 30: Step S235), reads the count value N from the memory M2 (Step S236), and opens the ink fountain key from the Nth ink fountain key control device 24. The presence or absence of an amount setting completion signal is confirmed (step S237).

  When it is confirmed that the ink fountain key opening amount setting completion signal has been transmitted from the Nth ink fountain key control device 24 (YES in step S237), 1 is added to the count value N in the memory M2 (step S238). The total number n of ink fountain keys is read from M7 (step S239), and the processing operations of steps S236 to S240 are repeated until the count value N exceeds the total number n of ink fountain keys (YES in step S240).

  When the count value N exceeds the total number n of ink fountain keys (YES in step S240), the CPU 19A determines that the setting of the ink fountain key opening amount has been completed, and all the ink fountain key control devices 24 (24-1 to 24-24). -N), an opening amount setting completion signal for all ink fountain keys is transmitted (step S241).

[Pre-inking II]
Next, the CPU 19A reads the rotational speed of the printing press during pre-inking from the memory M21 (FIG. 32: step S242), and sends it to the driving motor driver 19K (step S243). Further, the rotation amount of the ink fountain roller is read from the memory M22 (step S244), and the read rotation amount is transmitted to the ink fountain roller drive control device 23 (step S245). The ink fountain roller drive control device 23 receives the ink fountain roller rotation amount reception completion signal (YES in step S246), and outputs an operation signal to the ink call device 21 (step S247). Start the call operation.

  Further, a reset signal and an enable signal are sent to the counter 19Q for counting the number of rotations of the printing press (step S248), the output of the reset signal is stopped (step S249), and the counter 19Q for counting the number of rotations of the printing press is reset from zero. Start the count operation.

  Then, the CPU 19A reads the count value of the counter 19Q for counting the number of rotations of the printing press (step S250), and reads the number of ink calls during pre-inking II (converted to the number of rotations of the printing press) stored in the memory M23 ( If both match (step S251) (YES in step S252), the pre-inking II operation is terminated.

  By the operation of this pre-inking II, the ink film corresponding to the pattern of the printing plate of the print job C is applied to the minimum ink film thickness distribution Ma required during printing remaining in the ink roller group 6 of the printing unit 15. The thickness distribution Mb (see FIG. 46B) is superimposed.

[Trial printing function]
After completing the pre-inking II operation (YES in step S252), the CPU 19A outputs a paper feed start command to the paper feeder 22 (FIG. 33: step S253). Also, a printing start command and ink and bathing roller landing commands are output to the printing unit 15 (steps S254 and S255), and a reset signal and an enable signal are sent to the counter 19Q for counting the number of rotations of the printing press (step S256). The signal output is stopped (step S257). As a result, trial printing is started with the count value of the counter 19Q for counting the number of rotations of the printing press set to zero.

[Full-print transfer function]
During this trial printing, the CPU 19A reads the count value of the counter 19Q for counting the number of rotations of the printing press (step S258), and reads the measurement start number (converted to the rotation speed of the printing press) stored in the memory M24 (step S259). ) If the two match (YES in step S260), that is, if the number of prints after the start of the trial printing is the measurement start number (20), the measurement start number of prints is determined as the measurement target print. To do.

  Then, a reset signal and an enable signal are sent to the counter 19Q for counting the number of rotations of the printing press (FIG. 34: step S261), the output of the reset signal is stopped (step S262), and the counter 19Q for counting the number of rotations of the printing press is set to zero. Is started, the measurement end number (converted to the rotation speed of the printing press) stored in the memory M25 is read (step S264), and the count value of the counter 19Q for counting the number of rotations of the printing press is the measurement end number ( After confirming that it is not (80 sheets) (NO in step S265), the process proceeds to step S266 (FIG. 35).

  In step S266, the CPU 19A reads the count value of the counter 19M for detecting the rotational phase of the printing press. In step S267, the CPU 19A reads the rotational phase of the printing press at the time of taking the printed matter stored in the memory M9. If so (YES in step S268), an imaging command is output to the inspection camera 20 (step S269), and the RGB values of the captured image captured by the inspection camera 20 are stored in the memory M10 (step S270). Thereby, the color bar of the printed matter to be measured is imaged, and the RGB values of each color patch of the color bar are stored in the memory M10.

  Next, the CPU 19A writes “1” as a flag value for determining the start of main printing in the memory M26 (step S271), sets the count value N of the memory M2 to N = 1 (step S272), and counts from the memory M2. The value N is read (FIG. 36: step S273), the imaging position of the Nth color patch is read from the Nth address position of the memory M12 (step S274), and the address of the imaging position of the Nth color patch in the memory M10 is read. The RGB value of the Nth color patch is read out and stored in the Nth address position of the memory M13 (step S275).

  Then, the reference conversion formula (D = log10f (RGB value)) is read from the memory M15 (step S276), the paper type and the ink type are read from the memories M32 and M33 (steps S277 and S278), and from the memory M35. The correction value (ΔRGB value) of the Nth color patch is read from the corresponding paper type and ink type area (step S279), the reference conversion formula (D = log10f (RGB value)) and the Nth color. Using the correction value (ΔRGB value) of the patch, the RGB value of the Nth color patch is converted to the density value of the Nth color patch, and the converted density value of the Nth color patch is converted to the Nth color of the memory M11. Is stored in the address position (step S280).

  Then, the reference density value stored in the memory M27 is read (step S281), the reference density value is subtracted from the density value of the Nth color patch, the density difference of the Nth color patch is obtained, and N in the memory M28 is obtained. This is stored in the th address position (step S282). Then, the allowable value of density difference stored in the memory M29 is read (step S283), and the read allowable value of density difference is compared with the density difference of the Nth color patch (FIG. 37: step S284).

  If the density difference of the Nth color patch does not exceed the allowable value (NO in step S284), that is, if it is within the allowable value, 1 is added to the count value N of the memory M2 (step S285). The total number n of ink fountain keys is read from the memory M7 (step S286), and the count value N is compared with the total number n of ink fountain keys (step S287).

  When the density values of the color patches of the printed material to be measured are all within the allowable range (the density difference from the reference density value is within the allowable value), the CPU 19A repeats the processing operations of steps S273 to S287, and the count value N When the number of ink fountain keys exceeds the total number n of ink fountain keys (YES in step S287), a flag value for determining the start of actual printing is read from the memory M26 (step S288), and it is confirmed whether or not the flag value is “1”. (Step S289).

  In this case, since the flag value for determining the start of actual printing is “1” (YES in step S289), the CPU 19A reads the printing speed from the memory M1 (step S290) and outputs it to the driving motor driver 19K (step S290). Step S291). As a result, the printing machine speed is set as the printing speed, and the transition from the trial printing to the main printing is automatically performed.

  On the other hand, if the density difference of the Nth color patch exceeds the allowable value (YES in step S284), the CPU 19A reads a correction value conversion table of density difference-ink fountain key opening amount from the memory M30 (FIG. 38). Step S292), using the read density difference-ink fountain key opening amount correction value conversion table, a correction value of the Nth ink fountain key opening amount corresponding to the density difference of the Nth color patch is obtained, and the memory M31. Is stored in the Nth address position (step S293).

  Then, the opening amount of the Nth ink fountain key is read from the Nth address position of the memory M20 (step S294), and the correction value of the opening amount of the Nth ink fountain key is added to the read opening amount of the Nth ink fountain key. The corrected opening amount of the Nth ink fountain key is overwritten on the Nth address position of the memory M20 (step S295). Then, the opening amount of the Nth ink fountain key overwritten on the Nth address position of the memory M20 is read (step S296), and transmitted to the Nth ink fountain key drive controller 24 (step S297).

  Then, it is confirmed that the reception completion signal for the opening amount of the Nth ink fountain key has been transmitted from the controller 24 for driving the Nth ink fountain key (YES in step S298), that is, the opening amount of the Nth ink fountain key is adjusted. After confirming this, the flag value for determining the final printing start in the memory M26 is set to “2” (step S299), and the process proceeds to step S285 (FIG. 37).

  The CPU 19A repeats the processing operations of steps S273 to S287 for density values that are within the allowable range (the density difference from the reference density value is within the allowable value) among the density values of the color patches of the printed material to be measured. For density values that do not fall within the allowable range (the density difference from the reference density value is within the allowable value), the processing operations of steps S273 to S284, S292 to S299, and S285 to S287 are repeated, and the count value N is the total number n of ink fountain keys. Is exceeded (YES in step S287), the flag value for determining the start of actual printing is read from the memory M26 (step S288).

  In this case, since the flag value for determining the start of actual printing is “2” (NO in step S289), the CPU 19A returns to step S263 (FIG. 34) and prints with the ink fountain key opening amount adjusted. The printed material thus obtained is set as the next printed material to be measured, and similarly to the first printed material to be measured, it is checked whether or not the density value of each color patch of the printed material to be measured is within the allowable range.

  If the CPU 19A confirms that the density values of the color patches of the print object to be measured are all within the allowable range and the flag value for determining the start of main printing in the memory M26 is “1” (step S289). YES), the printing speed is read from the memory M1 (step S290), and is output to the driving motor driver 19K (step S291). As a result, the printing machine speed is set as the printing speed, and the transition from the trial printing to the main printing is automatically performed.

  On the other hand, if even one density value of each color patch of the printed material to be measured is not within the allowable range (YES in step S284), the CPU 19A adjusts the opening amount of the ink fountain key (steps S292 to S298). Then, the flag value for determining the start of main printing in the memory M26 is set to “2” (step S299), the process returns to step S263 in response to NO in step S289, and the trial printing is performed with the ink fountain key opening amount adjusted. The printed material is set as a printed material to be measured next, and the check is repeated whether or not the density value of each color patch of the printed material to be measured is within the allowable range.

  Each time the CPU 19A returns to step S263, it reads the count value N of the counter 19Q for counting the number of rotations of the printing press (step S263), and reads the measurement end number (converted to the rotation speed of the printing press) stored in the memory M25. (Step S264), the count value N is compared with the number of measurement-completed sheets (Step S265).

  Here, when it is confirmed that the count value N has reached the measurement end number (YES in step S265), that is, when it is confirmed that the number of printed materials to be measured has reached the measurement end number (80). The CPU 19A outputs a paper feed stop command to the paper feeder 22 (step S300), outputs a print stop command and an ink / swimsuit roller removal command to the printing unit 15 (steps S301 and S302), and the driving motor driver 19K. A stop signal is output to (step S303), and printing is stopped.

[Ink fountain roller drive control device]
FIG. 39 shows an outline of the internal configuration of the ink fountain roller drive control device 23 (23-1 to 23-n). The ink fountain roller drive control device 23 includes a CPU 23A, RAM 23B, ROM 23C, ink fountain roller drive motor 23D, ink fountain roller drive motor driver 23E, ink fountain roller drive motor rotary encoder 23F, input / output interface (I / O). O, I / F) 23G and 23H, and memories M41 and M42, and is connected to the print job switching control device 19 via the interface 23G. The memory M41 stores the received rotation amount of the ink fountain roller. The memory M42 stores a target feed amount of the ink fountain roller.

  When the rotation amount of the ink fountain roller is sent from the print job switching control device 19 (FIG. 40: YES in step S401), the CPU 23A stores the received rotation amount in the memory M41 (step S402) and prints. A reception completion signal of the rotation amount of the ink fountain roller is transmitted to the job switching control device 19 (step S403). Further, the received ink fountain roller rotation amount is stored in the memory M42 as the target ink fountain roller feed amount (target rotation amount) (step S404). Then, the target rotation amount is read from the memory M42 (step S405), sent to the ink fountain roller driving motor driver 23E, and the rotation amount of the ink fountain roller driving motor 23D is adjusted to the target rotation amount (step S406).

[Ink fountain key drive control device]
FIG. 41 shows an outline of the internal configuration of the ink fountain key drive control device 24 (24-1 to 24-n). The ink fountain key drive control device 24 includes a CPU 24A, a RAM 24B, a ROM 24C, an ink fountain key drive motor 24D, an ink fountain key drive motor driver 24E, an ink fountain key drive motor rotary encoder 24F, a counter 24G, an input / output interface (I / O, I / F). ) 24H and 24I, and memories M51 to M54, which are connected to the print job switching control device 19 via the interface 24I. The memory M51 stores the received ink fountain key opening amount. The memory M52 stores a target ink fountain key opening amount. The memory M53 stores the count value of the counter 24G. The memory M54 stores the current opening degree of the ink fountain key.

  When the ink fountain key opening amount is sent from the print job switching control device 19 (FIG. 42: YES in step S501), the CPU 24A stores the received opening amount in the memory M51 (step S502) and print job switching. A reception completion signal of the ink fountain key opening amount is transmitted to the control device 19 (step S503). Further, the received opening amount is stored in the memory M52 as a target opening amount (step S504).

  Then, the count value of the counter 24G is read (step S505), the current ink fountain key opening amount is obtained from the read count value of the counter 24G (step S506), and the target opening amount is read from the memory M52 (step S507). If the current ink fountain key opening amount is the same as the target opening amount (YES in step S508), the process immediately proceeds to step S517 (FIG. 43), and the ink fountain key opening amount setting completion signal is sent to the print job switching control device 19. Is output.

  If the current ink fountain key opening amount is not the same as the target opening amount (NO in step S508), after driving the ink fountain key driving motor 24D until the current ink fountain key opening amount becomes the same as the target opening amount. (Steps S509 to S516), an ink fountain key opening amount setting completion signal is output to the print job switching control device 19 (step S517).

  When the CPU 24A receives the ink fountain key opening amount setting completion signal to the print job switching control device 19 and receives the ink fountain key opening amount setting completion signal from the print job switching control device 19 (YES in step S518). ), The output of the ink fountain key opening amount setting completion signal to the print job switching control device 19 is stopped (step S519).

[Extension of the embodiment]
The present invention has been described above with reference to the embodiment. However, the present invention is not limited to the above embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the technical idea of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Ink fountain, 2 ... Ink, 3 ... Ink fountain roller, 4 (4-1 to 4-n) ... Ink fountain key, 5 ... Ink calling roller, 6 ... Ink roller group, 7 ... Printing plate, 8 ... Plate cylinder, 9 ... printed matter, 9-2 ... color bar, 9a ... color patch, 15 (15-1 to 15-4) ... printing unit, 16 ... paper feed unit, 17 ... paper discharge unit, 18 ... driving motor of printing press, 19 ... Print job switching control device, 19A ... CPU, 19B ... RAM, 19C ... ROM, 19D ... Input device, 19E ... Display device, 19F ... Output device, 19G ... Memory, 19I ... A / D converter, 19K ... Priming motor Driver, 19L ... Rotary encoder for motor, 19M ... Counter for detecting rotational phase of printing press, 19N ... D / A converter, 19P ... Home position detector for printing press, 19Q ... Counting the number of rotations of printing press Counter, 19R: Colorimeter, 19S: Motor for moving the colorimeter, 19T: Motor driver for moving the colorimeter, 19U: Rotary encoder for the motor for moving the colorimeter, 19V: Counter for measuring the current position of the colorimeter , 19W ... Colorimeter origin position detector, 19X ... A / D converter, 19Y ... D / A converter, 19Z1 ... Paper type setter, 19Z2 ... Ink type setter, 19-1 to 19-13 ... Input / output interfaces (I / O, I / F), 20 ... Inspection camera, 21 ... Ink calling device, 22 ... Feeding device, 23 ... Control device for driving ink fountain roller, 24 (24-1 to 24-n) ) ... Ink fountain key drive control device, SW1 ... Print start switch, SW2 ... Print stop switch, SW3 ... Conversion operation switch, SW4 ... Ink remove switch, SW5 ... Print job Replacement start switch, SW6 ... correction value calculation switch.

Claims (6)

An ink preset means for forming an ink film thickness distribution according to the pattern of the printing plate mounted on the plate cylinder in the ink supply apparatus, and an ink film thickness distribution corresponding to the image of the printing plate is formed in the ink supply apparatus. In the control device of the printing press provided with a trial printing means for performing printing of a predetermined number of sheets as a trial printing before starting the main printing in a state where
Density measuring means for measuring a density value of a printed matter printed by the printing machine;
Imaging means for imaging a printed matter printed by the printing press;
Printed using the color measurement value obtained from the captured image of the printed matter printed using the first printing material imaged by the imaging unit and the first printing material measured by the density measurement unit A conversion relationship determining means for obtaining a conversion relationship for converting the color measurement value into the density value from the density value of the printed matter;
A color measurement value obtained from a captured image of a printed matter printed using a second printing material different from the first printing material imaged by the imaging means, and the first color measured by the density measurement means. Correction value determining means for obtaining a correction value for the conversion relationship from the density value of the printed matter printed using the printing material of 2 and the conversion relationship determined by the conversion relationship determining means;
A printed matter printed by the trial printing means using the same printing material as the second printing material is a printed matter to be measured, and the printed matter to be measured taken during conveyance in the printing machine by the imaging means. The color measurement value obtained from the captured image is converted into a density value using the conversion relationship obtained by the conversion relationship determining means and the correction value obtained by the correction value determining means, and the converted printed matter to be measured Whether or not the density value is within the allowable range, and if it is within the allowable range, the print printing means for continuing the printing of the printed matter by the trial printing means and shifting to the main printing as it is, A control device for a printing press, comprising: In the control device of the printing press according to claim 1,
The main printing transfer means includes:
When the printed matter printed using the same printing material as the second printing material by the trial printing means has reached a predetermined measurement start number, the printed matter that has reached the measurement start number is set as a measurement target printed matter, The color measurement value obtained from the captured image of the printed matter to be measured, which is imaged during conveyance in the printing press by the imaging means, is obtained by the conversion relation obtained by the conversion relation decision means and the correction value decision means. Is converted into a density value by using the corrected value, and it is checked whether or not the converted density value of the printed matter to be measured is within an allowable range. In the meantime, the printing of the printed matter is continued to be transferred to the final printing, while if it is not within the allowable range, the ink film thickness distribution formed by the ink presetting means is adjusted. The printed matter printed with the same printing material as the second printing material by the trial printing means in a state where the thickness distribution is adjusted is set as the next measured printed matter, and the density value of the measured printed matter is A control device for a printing press, characterized by repeatedly checking whether it is within an allowable range. In the control device of the printing press according to claim 2,
The main printing transfer means includes:
The printing machine control apparatus, wherein printing is stopped when the number of printed materials to be measured reaches a predetermined measurement end number. An ink preset step for forming an ink film thickness distribution corresponding to the pattern of the printing plate mounted on the plate cylinder in the ink supply device, and an ink film thickness distribution corresponding to the image of the printing plate formed in the ink supply device In a control method for a printing press comprising a trial printing step for performing a predetermined number of printings as a trial printing before starting a main printing in a state where
A density measuring step for measuring a density value of a printed matter printed by the printing press;
An imaging step of imaging a printed matter printed by the printing press;
Printed using the color measurement value obtained from the captured image of the printed matter printed using the first printing material imaged in the imaging step and the first printing material measured in the density measurement step. A conversion relationship determining step for obtaining a conversion relationship for converting the color measurement value into the density value from the density value of the printed matter;
The color measurement value obtained from the captured image of the printed matter printed using the second printing material different from the first printing material imaged by the imaging step, and the first color measured by the density measurement step. A correction value determining step for obtaining a correction value for the conversion relationship from the density value of the printed matter printed using the printing material of 2 and the conversion relationship determined by the conversion relationship determining step;
The printed matter printed by using the same printing material as the second printing material in the trial printing step is set as a measurement subject printed matter, and the measurement subject printed matter imaged during conveyance in the printing press in the imaging step is used. The color measurement value obtained from the captured image is converted into a density value using the conversion relationship obtained in the conversion relationship determination step and the correction value obtained in the correction value determination step, and the converted printed matter to be measured Whether or not the density value is within the allowable range, and if it is within the allowable range, the printing transition step of continuing the printing of the printed matter by the trial printing step and shifting to the final printing as it is, A control method for a printing press, comprising: In the control method of the printing machine described in Claim 4,
The final printing transition step includes:
When the printed matter printed using the same printing material as the second printing material by the trial printing step has reached a predetermined measurement start number, the printed matter that has reached the measurement start number is set as a measurement target printed matter, The color measurement value obtained from the captured image of the printed matter to be measured captured during conveyance in the printing press by the imaging step is obtained in the conversion relationship obtained in the conversion relationship determination step and the correction value determination step. Is converted into a density value using the corrected value, and it is checked whether or not the converted density value of the printed matter to be measured is within an allowable range. Ink formed by the ink presetting step when the printing of the printed matter is continued and shifted to the main printing, but is not within the allowable range The thickness distribution is adjusted, and the printed material printed using the same printing material as the second printing material in the trial printing step in the state where the ink film thickness distribution is adjusted is used as the next measurement target printed material. A control method for a printing press, characterized in that the check of whether the density value of the target printed matter is within an allowable range is repeated. In the control method of the printing press according to claim 5,
The final printing transition step includes:
A printing machine control method, wherein printing is stopped when the number of printed materials to be measured reaches a predetermined measurement end number.

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