JP6220117B2 - Control device and control method for printing press - Google Patents

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. 33 shows the main part of the inker (ink supply device) in the printing unit for each color in the printing press. 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. 34 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. 35A), 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. 35B) 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 calling 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. 35B) 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. 35A) 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 Ma corresponding to the pattern of the new printing plate 7 'is changed to the minimum ink film thickness distribution Ma required during printing formed on the ink roller group 6 by calling up a predetermined number of times (FIG. 35). (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. 36 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 color measurement values obtained from the captured image of the printed matter taken by the imaging means, A conversion relation determining means for obtaining a conversion relation for converting a color measurement value into a density value from the density value of the printed matter measured by the density measuring means; and a printed matter printed by the trial printing means as a measurement target printed matter. Then, 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 unit is converted into a density value using the conversion relationship obtained by the conversion relationship determining unit, and this conversion is performed. It is checked whether the density value of the printed material to be measured is within the allowable range, and if it is within the allowable range, printing of the printed material is continued as it is by the trial printing means and transferred to the main printing, and measurement is performed. It is characterized by comprising a full-print transition means for canceling printing when the number of target prints reaches a predetermined measurement end number .

  In the present invention, the conversion relationship for converting the color measurement value into the density value is obtained from the color measurement value obtained from the captured image of the printed matter imaged by the imaging means and the density value of the printed matter measured by the density measurement means. 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.

  In the present invention, for example, if the 20th printed product that has been trial printed is the printed material to be measured, the color measurement value obtained from the captured image of the printed material to be measured captured during conveyance in the printing press is converted. It is converted into a density value using the conversion relationship obtained by the determination means, 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.

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 the printed matter printed by shifting the supply amount of an ink on purpose and each color patch of the printed matter. 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. It is a top view which shows the printed matter (printed matter of measurement object) of the 20th sheet (measurement start number of sheets) by which trial printing was carried out. It is a top view which shows the printed matter of the next measuring object test-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. 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 drawing, reference numerals 15-1 to 15-4 denote printing units of respective colors, and the ink supply devices shown in FIG. 33 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 apparatus (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, And a conversion formula determining function for obtaining a conversion formula for converting the color measurement value of the printed matter into the density value.

[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 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, the print job switching control device 19 uses the pre-inking function to distribute the ink film thickness according to the printing plate pattern of the print job A. Are 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. 33, 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.

The outline of the operations of “preparation” and “print job A” 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.

  FIG. 6 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 operation switch SW3, an ink removing switch SW4, a print job switch start switch SW5, an input device 19D, and a display. 19E, an output device 19F, and a memory 19G.

  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 position measurement counter 19V, colorimeter origin position detector 19W, A / D converter 19X, D / A converter 19Y, and input / output interfaces (I / O, I / F) 19-1 to 19-1 19-12.

  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. 6, 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. 33) of the printing unit 15 of each color. The ink fountain roller drive control device 23 is provided for each color corresponding to the ink fountain roller 3 (FIG. 33) 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. 33) 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. 6, 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.

  7, 8 and 9 show the contents of the memory 19G in a divided manner. The memory 19G is provided with memories M1 to M31. 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 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. 10, 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” and “print job A” 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. 11: 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. 10) Set as printed material 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. 12: 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. 13: 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. 14: 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. 15: 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 A = When printing using the same type of printing materials (paper and ink) as in preparation]
When the print start switch SW1 is turned on (FIG. 16: YES in step S145), the CPU 19A of the print job switching control device 19 reads the printing speed from the memory M1 (step S146) and outputs it to the driving motor driver 19K (step S146). Step S147). Further, a paper feed start command is output to the paper feeder 22 (step S148), and a print start command and ink and swimsuit roller landing commands are output to the printing unit 15 (steps S149 and S150). 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 a printed matter different from print job A (printing of the previous job) is performed.

[Pre-inking function]
[Ink removing]
Here, when the ink removal switch SW4 is turned ON during the printing of the next print job A using the same type of printing material as the preparation (YES in step S151), the CPU 19A sends an operation stop signal to the ink calling device 21. Is output (step S152), 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. 17: step S153), and the output of the reset signal is stopped (step S154). 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 paper printing, the CPU 19A reads the count value of the counter 19Q for counting the number of rotations of the printing press (step S155), and reads the number of rotations during ink removal stored in the memory M17 (step S156). If they match (YES in step S157), a paper feed stop command is output to the paper feeder 22 (step S158). Also, a print stop command and an ink / swim-off roller removal command are output to the printing unit 15 (steps S159 and S160), and a stop signal is output to the driving motor driver 19K (step S161).

  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 A is input to the CPU 19A (FIG. 18: (YES in step S162), the count value N in the memory M2 is set to N = 1 (step S163), the count value N is read from the memory M2 (step S164), 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 S165).

  Then, 1 is added to the count value N in the memory M2 (step S166), the total number n of ink fountain keys is read from the memory M7 (step S167), and the count value N exceeds the total number n of ink fountain keys (YES in step S168). The processing operations in steps S164 to S168 are repeated. As a result, the pattern area ratio for each area of the plate of the print job A 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 print job A 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 A 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 A directly from the “pattern area ratio measuring device”. You may make it take in.

[Set the opening of the ink fountain key]
When the print job switching start switch SW5 is turned on (YES in step S169), the CPU 19A sets the count value N in the memory M2 to N = 1 (FIG. 19: step S170), and reads the count value N from the memory M2. (Step S171) 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 S172).

  Then, the pattern area ratio-ink fountain key opening amount conversion table in the memory M19 is read (step S173), 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 S174), and the controller 24 for driving the Nth ink fountain key is used. (Step S175).

  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 S176), and 1 is added to the count value N in the memory M2. In step S177, the total number n of ink fountain keys is read from the memory M7 (step S178), and the processing operations in steps S171 to S179 are repeated until the count value N exceeds the total number n of ink fountain keys (YES in step S179).

  As a result, 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 A 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. 20: step S180), reads the count value N from the memory M2 (step S181), and opens the ink fountain key from the Nth ink fountain key control device 24. The presence / absence of an amount setting completion signal is checked (step S182).

  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 S182), 1 is added to the count value N in the memory M2 (step S183). The total number n of ink fountain keys is read from M7 (step S184), and the processing operations of steps S181 to S185 are repeated until the count value N exceeds the total number n of ink fountain keys (YES in step S185).

  When the count value N exceeds the total number n of ink fountain keys (YES in step S185), 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 S186).

[Pre-inking II]
Next, the CPU 19A reads the rotational speed of the printing press during pre-inking from the memory M21 (FIG. 21: Step S187) and sends it to the driving motor driver 19K (Step S188). Further, the rotation amount of the ink fountain roller is read from the memory M22 (step S189), and the read rotation amount is transmitted to the ink fountain roller drive control device 23 (step S190). In response to the ink fountain roller rotation amount reception completion signal from the ink fountain roller drive control device 23 (YES in step S191), an operation signal is output to the ink call device 21 (step S192). 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 S193), the output of the reset signal is stopped (step S194), 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 S195), 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 the two match (step S196) (YES in step S197), 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 printing job A with 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. 35B) is superimposed.

[Trial printing function]
After completing the pre-inking II operation (YES in step S197), the CPU 19A outputs a paper feed start command to the paper feeder 22 (FIG. 22: step S198). Also, a printing start command and an ink and swimsuit roller landing command are output to the printing unit 15 (steps S199 and S200), 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 S201). The signal output is stopped (step S202). 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 S203), and reads the measurement start number (converted to the rotation speed of the printing press) stored in the memory M24 (step S204). ) If they match (YES in step S205), that is, if the number of printed sheets after the start of trial printing is the measurement start number (20 sheets), the printed material at the measurement start number is regarded as the measurement target printed material. 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. 23: step S206), the output of the reset signal is stopped (step S207), and the counter 19Q for counting the number of rotations of the printing press is set to zero. Is started, and the measurement end number (converted to the number of rotations of the printing press) stored in the memory M25 is read (step S209), 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 S210), the process proceeds to step S211 (FIG. 24).

  In step S211, the CPU 19A reads the count value of the counter 19M for counting the rotational phase of the printing press. In step S212, the CPU 19A reads the rotational phase of the printing press at the time of imaging the printed matter stored in the memory M9. If so (YES in step S213), an imaging command is output to the inspection camera 20 (step S214), and the RGB values of the captured image captured by the inspection camera 20 are stored in the memory M10 (step S214). 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 final printing start in the memory M26 (step S216), sets the count value N of the memory M2 to N = 1 (step S217), and counts from the memory M2. The value N is read (FIG. 25: step S218), the imaging position of the Nth color patch is read from the Nth address position of the memory M12 (step S219), and the address of the Nth color patch imaging position of 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 S220). Then, the standard conversion formula (D = log10f (RGB value)) is read from the memory M15 (step S221), and the RGB of the Nth color patch is used by using the standard conversion formula (D = log10f (RGB value)). The value is converted into a density value and stored in the Nth address position of the memory M11 (step S222).

  Then, the reference density value stored in the memory M27 is read (step S223), 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. The data is stored in the th address position (step S224). Then, the allowable value of density difference stored in the memory M29 is read (step S225), and the read allowable value of density difference is compared with the density difference of the Nth color patch (step S226).

  If the density difference of the Nth color patch does not exceed the allowable value (NO in step S226), that is, if it is within the allowable value, 1 is added to the count value N of the memory M2 (FIG. 26: step). S227) The total number n of ink fountain keys is read from the memory M7 (step S228), and the count value N is compared with the total number n of ink fountain keys (step S229).

  When the density values of the color patches of the printed material to be measured are all within the allowable range (the difference in density from the reference density value is within the allowable value), the CPU 19A repeats the processing operations of steps S218 to S229, and count value N When the number of ink fountain keys exceeds the total number n of ink fountain keys (YES in step S229), the flag value for determining the start of main printing is read from the memory M26 (step S230), and it is confirmed whether or not the flag value is “1”. (Step S231).

  In this case, since the flag value for determining the start of actual printing is “1” (YES in step S231), the CPU 19A reads the printing speed from the memory M1 (step S232) and outputs it to the driving motor driver 19K (step S232). Step S233). 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 S226), the CPU 19A reads a correction value conversion table of density difference-ink fountain key opening amount from the memory M30 (FIG. 27). Step S234), 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 obtained. Is stored in the Nth address position (step S235).

  Then, the opening amount of the Nth ink fountain key is read from the Nth address position of the memory M20 (step S236), 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 S237). Then, the opening amount of the Nth ink fountain key overwritten on the Nth address position of the memory M20 is read (step S238), and transmitted to the Nth ink fountain key drive control device 24 (step S239).

  Then, it is confirmed that the reception completion signal for the opening amount of the Nth ink fountain key has been transmitted from the control device 24 for driving the Nth ink fountain key (YES in step S240), 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 S241), and the process proceeds to step S227 (FIG. 26).

  The CPU 19A repeats the processing operations of steps S218 to S229 for the density value that is 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 S218 to S226, S234 to S241, and S227 to S229 are repeated, and the count value N is the total number n of ink fountain keys. Is exceeded (YES in step S229), the flag value for determining the start of actual printing is read from the memory M26 (step S230).

  In this case, since the flag value for determining the start of actual printing is “2” (NO in step S231), the CPU 19A returns to step S208 (FIG. 23) 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 respective color patches of the printed matter to be measured are all within the allowable range and the flag value for determining the start of printing in the memory M26 is “1” (step S231). YES), the printing speed is read from the memory M1 (step S232), and is output to the driving motor driver 19K (step S233). 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 S226), the CPU 19A adjusts the opening amount of the ink fountain key (steps S234 to S240). Then, the flag value for determining the final printing start in the memory M26 is set to “2” (step S241), the process returns to step S208 in response to NO in step S231, 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 S208, it reads the count value N of the counter 19Q for counting the number of rotations of the printing press (step S208), and reads the number of measurement completions (converted to the rotation speed of the printing press) stored in the memory M25. (Step S209), the count value N is compared with the measurement end number (step S210).

  Here, when it is confirmed that the count value N has reached the measurement end number (YES in step S210), 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 S242), outputs a print stop command and an ink / swimsuit roller removal command to the printing unit 15 (steps S243 and S244), and the driving motor driver 19K. A stop signal is output to (step S245), and printing is stopped.

[Ink fountain roller drive control device]
FIG. 28 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. 29: YES in step S301), the CPU 23A stores the received rotation amount in the memory M41 (step S302) 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 S303). Further, the received ink fountain roller rotation amount is stored in the memory M42 as a target ink fountain roller feed amount (target rotation amount) (step S304). Then, the target rotation amount is read from the memory M42 (step S305), 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 S306).

[Ink fountain key drive control device]
FIG. 30 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, and 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. 31: YES in step S401), the CPU 24A stores the received opening amount in the memory M51 (step S402) and print job switching. A reception completion signal of the ink fountain key opening amount is transmitted to the control device 19 (step S403). Further, the received opening amount is stored in the memory M52 as a target opening amount (step S404).

  Then, the count value of the counter 24G is read (step S405), the current ink fountain key opening amount is obtained from the read count value of the counter 24G (step S406), and the target opening amount is read from the memory M52 (step S407). If the current ink fountain key opening amount is the same as the target opening amount (YES in step S408), the process immediately proceeds to step S417 (FIG. 32), 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 S408), 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 S409 to S416), an ink fountain key opening amount setting completion signal is output to the print job switching control device 19 (step S417).

  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 S418). ), The output of the ink fountain key opening amount setting completion signal to the print job switching control device 19 is stopped (step S419).

[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, 19-1 to 19-12 ... I / O interface (I / O, I / F), 20 ... Inspection camera 21 ... Ink calling device 22 ... Paper feeding device 23 ... Ink fountain roller drive control device 24 (24-1 to 24-n) ... Ink fountain key drive control device SW1 ... Print start switch SW2 ... Print stop switch, SW3... Conversion type operation switch, SW4... Ink removing switch, SW5.

Claims (4)

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;
Conversion relation determination for obtaining a conversion relation for converting a color measurement value into a density value from a color measurement value obtained from a picked-up image of the printed matter imaged by the imaging means and a density value of the printed matter measured by the density measurement means. Means,
The printed matter printed by the trial printing means is taken as the printed matter to be measured, and the conversion relation determination is performed on the color measurement value obtained from the captured image of the printed matter to be measured taken during conveyance in the printing machine by the imaging means. It is converted into a density value using the conversion relationship obtained by the means, and it is checked whether or not the converted density value of the printed material to be measured is within the allowable range. A main printing transfer means for continuing the printing of the printed matter by the trial printing means to shift to the main printing and stopping the printing when the number of the printed materials to be measured reaches a predetermined number of measurement completions ; 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 by the trial printing means reaches a predetermined measurement start number, the printed matter that has reached the measurement start number is set as a measurement target printed matter, and is imaged by the imaging means during conveyance in the printing press. The color measurement value obtained from the captured image of the measurement target printed matter is converted into a density value using the conversion relationship obtained by the conversion relationship determining means, and the converted density value of the measurement target print is acceptable. It is checked whether or not it is within the range, and if it is within the allowable range, the printing of the printed matter by the proof printing means is continued and transferred to the main printing, while when it is not within the allowable 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 used for the next measurement. Of the printed material, the control apparatus of the printing press density value of the printed matter of the measurement object and repeating the check whether it is within the allowable range. 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;
Conversion relationship determination for obtaining a conversion relationship for converting a color measurement value into a density value from a color measurement value obtained from a captured image of the printed material imaged in the imaging step and a density value of the printed material measured in the density measurement step Steps,
The printed matter printed in the trial printing step is set as the measurement subject printed matter, and the color measurement value obtained from the captured image of the measurement subject printed matter taken during conveyance in the printing machine in the imaging step is determined as the conversion relation. It is converted into a density value using the conversion relationship obtained in the step, and it is checked whether or not the converted density value of the printed material to be measured is within the allowable range. A main printing transition step of continuing printing of the printed matter by the trial printing step to shift to the main printing, and stopping printing when the number of the printed materials to be measured reaches a predetermined measurement end number;
A control method for a printing press . In the control method of the printing machine described in Claim 3,
The final printing transition step includes:
When the printed material printed by the trial printing step reaches a predetermined measurement start number, the printed material that has reached the measurement start number is set as a measurement target printed material, and is imaged during conveyance in the printing machine by the imaging step. The color measurement value obtained from the captured image of the measurement target printed matter is converted into a density value using the conversion relationship obtained in the conversion relationship determining step, and the converted density value of the measurement target print is acceptable. Check whether it is within the range, and if it is within the allowable range, continue printing of the printed matter as it is in the trial printing step and shift to the main printing, while if not within the allowable range The ink film thickness distribution formed by the ink preset step is adjusted, and printing is performed by the trial printing step with the ink film thickness distribution adjusted. The prints and print the next measurement object, a control method for a printing press and repeating the check whether the density value of the printed matter of the measurement object is within an acceptable range.

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