JP6214862B2 - 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. 23 shows a 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. 24 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. 25A), that is, the ink film thickness distribution Ma corresponding to the 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. 25B) 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. 25B) 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 a minimum ink film thickness distribution Ma (see FIG. 25A) 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 corresponding to the pattern of the new printing plate 7 ′ is changed to the minimum ink film thickness distribution Ma required during printing formed in the ink roller group 6 by calling up a predetermined number of times (FIG. 25). (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. 26 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 Unexamined Patent Publication No. 03-106655 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.

  The present invention has been made to solve such a problem, and an object of the present invention is to control a printing press capable of eliminating waste of printing materials at the time of transition from trial printing to main printing. And providing a control method.

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, The density measurement means for measuring the density value of the printed matter printed by the printing machine while the printed matter is being transported in the printing press, and the printed matter printed by the trial printing means is the printed matter to be measured, and the density measurement means within the printing press. Check whether the density value of the printed material to be measured, measured during transport, is within the allowable range, and if it is within the allowable range, continue printing of the printed material with the trial printing means as it is and perform the final printing. It is shifted, when the number of prints to be measured has reached the measurement end number predetermined is characterized by having a present printing shifting unit to stop printing.

  In the present invention, for example, if the 20th printed product that has been trial printed is the printed material to be measured, it is checked whether or not the density value of the printed material to be measured is within an allowable range during conveyance in the printing press. . 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.

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 top view of the printed matter (printed matter to be measured) of the 20th (measurement start number) printed on the sheet-fed rotary printing press. It is a top view of the printed matter of the next measuring object test-printed in this sheet-fed rotary printing press. 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. 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 of 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. 23 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. The discharge path is provided with an in-line density measuring device 20 that measures the density of the printed material during conveyance as one of the components of the print job switching control device 19.

  In this embodiment, the in-line density measuring device 20 is constituted by a densitometer or a spectrophotometer provided corresponding to each color patch 9a of the color bar 9-2 of the printed matter 9 (FIG. 24). The density of each color patch 9a of the color bar 9-2 of the printed matter 9 printed and conveyed by -1 to 15-4 is measured. If the density of each color patch 9a can be measured at a high speed, a self-propelled densitometer or a spectrophotometer may be used (see, for example, Patent Document 3).

  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, and a main printing transfer function that automatically shifts from the trial printing to the final printing when the density value of each color of the printed material is within the allowable range I have.

[Schematic operation of the print job switching control device]
Hereinafter, the print job switching control device 19 will be described with respect to a schematic operation when the printing plate of the previous printing job is replaced with the printing plate of the next printing job (hereinafter referred to as printing job A) to print the printed matter. This will be described with the functions it has.

[Print job A]
[Pre-inking function]
When the printing plate A is replaced and printing of the next printing job A is performed, the printing job switching control device 19 uses the pre-inking function to change the ink film thickness distribution corresponding to the printing plate pattern of the printing job A to each printing unit 15. In the ink supply apparatus.

  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. 23, 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 the test print 9A ₁ (see FIG. 2) as the measurement target, and the color bar 9-2 of the print 9A _{1 as} the measurement target. The density of each color patch 9a is measured by the in-line density measurement device 20 during conveyance in the printing press, and the density value D1 of each color patch 9a is obtained.

  Then, the print job switching control device 19 obtains a density difference ΔD1 between the measured density value D1 of each color batch 9a and a reference density value determined for each color, and the density difference ΔD1 is all within an allowable value. If there is, it is determined that the density value of each color 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 measured density value D1 of each color batch 9a includes a density difference ΔD1 with the reference density value of each color that exceeds the allowable value, the print job switching control device 19 determines the ink film thickness distribution. The printed product 9A that has been trial-printed in a state where the ink film thickness distribution is adjusted is used as the next measurement target print 9A ₂ (see FIG. 3), and each color patch 9a of the measurement target print 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 operation of the above-described print job A will be described below.
[Print job A]
(1) The ink film thickness distribution of print job A is formed by the pre-inking function, and the printed matter is printed (trial printing).
(2) The printed matter printed on the 20th sheet (the number of measurement start sheets) is the printed matter to be measured, and each color patch of the color bar of the printed matter to be measured is measured with an in-line density measuring device (densitometer or spectrophotometer). Measure and obtain the density value of each color patch.
(3) If the density value of each color patch measured in (2) is within the allowable range, skip to (6), and if it is not within the allowable range, adjust the ink film thickness distribution.
(4) The printed matter that has been printed with the ink film thickness distribution adjusted is used as the next measurement target print, and each color patch of the color bar of the measurement target print is connected to an in-line density measuring device (a densitometer or spectrophotometer). To obtain the density value of each color patch.
(5) If the density value of each color patch measured in (4) is within the allowable range, skip to (6). If not within the allowable range, adjust the ink film thickness distribution and return to (4). However, if (4) and (5) are repeated, if the number of printed materials to be measured reaches the measurement end number (80), printing is stopped.
(6) The main print of print job A is performed.

  FIG. 4 is 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 stop switch SW1, a print job switching start switch SW2, an input device 19D, a display 19E, an output device 19F, and a memory 19G.

Further, the colorimeters 19H _{1 to} 19Hn, A / D converters 19I _{1 to} 19In, a driving motor driver 19K, a driving motor rotary encoder 19L, a rotary phase detection counter 19M for a printing press, a D / A converter 19N, printing A machine origin position detector 19P, a printing machine rotation count counter 19Q, and input / output interfaces (I / O, I / F) 19-1 to 19-8 are provided.

  The CPU 19A obtains various input information given via the interfaces 19-1 to 19-8, and operates according to the program stored in the ROM 19C while accessing the RAM 19B and the memory 19G.

  In FIG. 4, 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. 23) 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. 23) 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. 23) of the printing unit 15 of each color. It has been. Colorimeters 19H _{1 to} 19Hn and A / D converters 19I _{1 to} 19In are also provided for each color. 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. 4, the printing unit 15, the ink calling device 21, the ink fountain roller drive control device 23, the ink fountain key drive control device 24 (24-1 to 24-n), the colorimeters 19H _{1 to} 19Hn, For the A / D converters 19I _{1 to} 19In, only one color is shown. In the print job switching control device 19, the in-line density measuring device 20 (FIG. 1) includes a color value meter 19H _{1 to} 19Hn for each color, an A / D converter 19I _{1 to} 19In, and a density value calculation function of the CPU 19A. It is realized by. The density value calculation function of the CPU 19A will be described later.

  5 and 6 show the contents of the memory 19G in a divided manner. The memory 19G is provided with memories M1 to M23. The memory M1 stores the count value of the counter for counting the number of rotations of the printing press. The memory M2 stores the number of rotations during ink removal for each color. A count value N is stored in the memory M3. The memory M4 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 M5 stores the total number n of ink fountain keys of each printing unit. The memory M6 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 M7 stores the opening amount of each ink fountain key of each printing unit. The memory M8 stores the rotational speed of the printing press during pre-inking. The memory M9 stores the rotation amount of the ink fountain roller of each printing unit. The memory M10 stores the number of ink calls (preliminary printing speed conversion) during pre-inking II for each color.

  In the memory M11, the number of measurement start sheets at the time of trial printing (20 sheets (converted with the rotation speed of the printing press)) is stored. In the memory M12, 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 M13 stores the count value of the rotation phase detection counter of the printing press. The memory M14 stores the rotational phase of the printing press at the time of color patch measurement. The memory M15 stores color data from the colorimeter. The memory M16 stores a flag value for determining the start of actual printing.

  The memory M17 stores the density value of each color patch calculated from the color data. The memory M18 stores a reference density value for each color. The memory M19 stores the difference (density difference) between the density value of each color patch of each color and the reference density value of each color. The memory M20 stores an allowable value of the density difference of each color. The memory M21 stores a correction value conversion table for the density difference of each color-the opening amount of the ink fountain key. The memory M22 stores a correction value for the opening amount of each ink fountain key of each printing unit. The memory M23 stores the printing speed.

[Detailed operation of print job switching control device]
Hereinafter, the detailed operation when the printing plate of the previous printing job is replaced with the printing plate of the next printing job (printing job A) and the printed material is printed is exchanged with the functions of the printing job switching control device 19. explain. 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.

[Pre-inking function]
[Ink removing]
When the print stop switch SW1 is turned on (FIG. 7: YES in step S101), the CPU 19A of the print job switching control device 19 outputs an operation stop signal to the ink calling device 21 (step S102), and the ink calling roller 5 Ink call operation 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 (step S103), the output of the reset signal is stopped (step S104), and the counter 19Q for counting the number of rotations of the printing press is reset from zero. Start the count operation.

  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 S105), and reads the number of rotations during ink removal stored in the memory M2 (step S106). If they match (YES in step S107), a paper feed stop command is output to the paper feeder 22 (step S108). Further, a printing stop command and an ink / swimsuit roller (not shown) removal command are output to the printing unit 15 (steps S109 and S110), and a stop signal is output to the driving motor driver 19K (step S111).

  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 (FIG. 25 (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 a 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. 8: (YES in step S112), the count value N in the memory M3 is set to N = 1 (step S113), the count value N is read from the memory M3 (step S114), 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 M4 (step S115).

  Then, 1 is added to the count value N in the memory M3 (step S116), the total number n of ink fountain keys is read from the memory M5 (step S117), and the count value N exceeds the total number n of ink fountain keys (YES in step S118). The processing operations in steps S114 to S118 are repeated. As a result, the pattern area ratio for each area of the printing 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 M4.

  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 SW2 is turned on (YES in step S119), the CPU 19A sets the count value N in the memory M3 to N = 1 (FIG. 9: step S120), and reads the count value N from the memory M3 ( In step S121, the pattern area ratio in the range corresponding to the Nth ink fountain key is read from the address position for the Nth ink fountain key in the memory M4 (step S122).

  Then, the pattern area ratio-ink fountain key opening amount conversion table in the memory M6 is read (step S123), and using the 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 M7 (step S124), and the controller 24 for driving the Nth ink fountain key is used. (Step S125).

  Then, it is confirmed that the Nth ink fountain key drive control device 24 has received a reception completion signal for the opening amount of the Nth ink fountain key (YES in step S126), and 1 is added to the count value N in the memory M3. (Step S127), the total number n of ink fountain keys is read from the memory M5 (Step S128), and the processing operations of Steps S121 to S129 are repeated until the count value N exceeds the total number n of ink fountain keys (YES in Step S129).

  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 A is obtained and stored in the memory M7. 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 M3 to N = 1 (FIG. 10: step S130), reads the count value N from the memory M3 (step S131), 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 S132).

  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 S132), 1 is added to the count value N in the memory M3 (step S133). The total number n of ink fountain keys is read from M5 (step S134), and the processing operations of steps S131 to S135 are repeated until the count value N exceeds the total number n of ink fountain keys (YES in step S135).

  When the count value N exceeds the total number n of ink fountain keys (YES in step S135), 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 S136).

[Pre-inking II]
Next, the CPU 19A reads the rotational speed of the printing press during pre-inking from the memory M8 (FIG. 11: Step S137) and sends it to the driving motor driver 19K (Step S138). Further, the rotation amount of the ink fountain roller is read from the memory M9 (step S139), and the read rotation amount is transmitted to the ink fountain roller drive control device 23 (step S140). In response to the ink fountain roller rotation amount reception completion signal from the ink fountain roller drive control device 23 (YES in step S141), an operation signal is output to the ink calling device 21 (step S142). 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 S143), the output of the reset signal is stopped (step S144), 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 S145), 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 M10 ( If both match (step S146) (YES in step S147), 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. 25B) is superimposed.

[Trial printing function]
After completing the pre-inking II operation (YES in step S147), the CPU 19A outputs a paper feed start command to the paper feeder 22 (FIG. 12: step S148). In addition, a printing start command and an ink and swimsuit roller landing command are output to the printing unit 15 (steps S149 and S150), 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 S151). The signal output is stopped (step S152). 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 S153), and reads the measurement start number (converted to the rotation speed of the printing press) stored in the memory M11 (step S154). ) If they match (YES in step S155), 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. 13: step S156), the output of the reset signal is stopped (step S157), and the counter 19Q for counting the number of rotations of the printing press is zero. Is started, the measurement end number (converted to the rotation speed of the printing press) stored in the memory M12 is read (step S159), and the count value of the rotation count counter 19Q of the printing press is the measurement end number ( After confirming that it is not (80 sheets) (NO in step S160), the process proceeds to step S161 (FIG. 14).

In step S161, the CPU 19A reads the count value of the counter 19M for counting the rotational phase of the printing press. In step S162, the CPU 19A reads the rotational phase of the printing press at the time of the color patch measurement stored in the memory M14. If they match (YES in step S163), a colorimetry command is output to the colorimeters 19H _{1 to} 19Hn (step S164).

  Then, the CPU 19A sets the count value N of the memory M3 to N = 1 (step S165), reads the count value N from the memory M3 (step S166), reads the color data from the Nth colorimeter 19H, and reads the color data from the memory M15. Store in the Nth address position (step S167), add 1 to the count value N of the memory M3 (step S168), read out the total number n of ink fountain keys from the memory M5 (step S169), and the count value N is the total number of ink fountain keys. Until n is exceeded (YES in step S170), the processing operations in steps S166 to S170 are repeated. Thereby, the color data of each color patch of the printed material to be measured is stored in the memory M15.

  Next, the CPU 19A writes “1” as the flag value for determining the final printing start in the memory M16 (FIG. 15: step S171), sets the count value N of the memory M3 to N = 1 (step S172), The count value N is read from M3 (step S173), the color data corresponding to the Nth color patch is read from the Nth address position of the memory M15 (step S174), and the color corresponding to the read Nth color patch is read. The density value of the Nth color patch is calculated from the data and stored in the Nth address position of the memory M17 (step S175).

  Then, the reference density value stored in the memory M18 is read (step S176), 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 M19 is obtained. This is stored in the th dress position (step S177). Then, the allowable value of the density difference stored in the memory M20 is read (step S178), and the read allowable value of the density difference is compared with the density difference of the Nth color patch (step S179).

  If the density difference of the Nth color patch does not exceed the allowable value (NO in step S179), that is, if it is within the allowable value, 1 is added to the count value N of the memory M3 (FIG. 16: step). In step S180, the total number n of ink fountain keys is read from the memory M5 (step S181), and the count value N is compared with the total number n of ink fountain keys (step S182).

  When the density values of the respective 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 S173 to S182, and count value N When the number of ink fountain keys exceeds the total number n of ink fountains (YES in step S182), a flag value for determining the start of main printing is read from the memory M16 (step S183), and it is confirmed whether or not the flag value is “1”. (Step S184).

  In this case, since the flag value for determining the start of actual printing is “1” (YES in step S184), the CPU 19A reads the printing speed from the memory M23 (step S185) and outputs it to the driving motor driver 19K (step S185). Step S186). 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 S179), the CPU 19A reads a correction value conversion table of density difference-ink fountain key opening amount from the memory M21 (FIG. 17). Step S187), 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 M22 is obtained. Is stored in the Nth address position (step S188).

  Then, the opening amount of the Nth ink fountain key is read from the Nth address position of the memory M7 (step S189), 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 M7 (step S190). Then, the opening amount of the Nth ink fountain key overwritten on the Nth address position of the memory M7 is read (step S191), and transmitted to the Nth ink fountain key drive control device 24 (step S192).

  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 S193), 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 M16 is set to “2” (step S194), and the process proceeds to step S180 (FIG. 16).

  The CPU 19A repeats the processing operations of steps S173 to S182 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 are not within the allowable range (the density difference from the reference density value is within the allowable value), the processing operations of steps S173 to S179, S187 to S194, and S180 to S182 are repeated, and the count value N is the total number n of ink fountain keys. Is exceeded (YES in step S182), the flag value for determining the start of actual printing is read from the memory M16 (step S183).

  In this case, since the flag value for determining the start of actual printing is “2” (NO in step S184), the CPU 19A returns to step S158 (FIG. 13) and prints with the ink fountain key opening amount adjusted. The printed material thus obtained is used as the next printed material to be measured, and in the same manner as the first printed material to be measured, it is checked whether 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 all the density values of the color patches of the printed matter to be measured are within the allowable range and the flag value for determining the start of printing in the memory M16 is “1” (step S184). YES), the printing speed is read from the memory M23 (step S185), and is output to the driving motor driver 19K (step S186). 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 S179), the CPU 19A adjusts the opening amount of the ink fountain key (steps S187 to S193). Then, the flag value for determining the final printing start in the memory M16 is set to “2” (step S194), the process returns to step S158 in response to NO in step S184, and the printed matter is printed with the ink fountain key opening amount adjusted. Is the next print object to be measured, and the check is repeated to determine whether the density value of each color patch of the print object to be measured is within the allowable range.

  Each time the CPU 19A returns to step S158, it reads the count value N of the counter 19Q for counting the number of rotations of the printing press (step S158), and reads the measurement end number (converted to the rotation speed of the printing press) stored in the memory M12. (Step S159), the count value N is compared with the number of measurement end sheets (step S160).

  Here, when it is confirmed that the count value N has reached the measurement end number (YES in step S160), 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 S195), outputs a print stop command and an ink / swimsuit roller removal command to the printing unit 15 (steps S196, S197), and the driving motor driver 19K. A stop signal is output to (step S198), and printing is stopped.

[Ink fountain roller drive control device]
FIG. 18 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, 23H and memories M31, M32, and is connected to the print job switching control device 19 via the interface 23G. The memory M31 stores the received rotation amount of the ink fountain roller. The memory M32 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. 19: YES in step S201), the CPU 23A stores the received rotation amount in the memory M31 (step S202) and prints. A reception completion signal for the rotation amount of the ink fountain roller is transmitted to the job switching control device 19 (step S203). The received ink fountain roller rotation amount is stored in the memory M32 as the target ink fountain roller feed amount (target rotation amount) (step S204). Then, the target rotation amount is read from the memory M32 (step S205), 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 S206).

[Ink fountain key drive control device]
FIG. 20 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 M41 to M44, and is connected to the print job switching control device 19 through the interface 24I. The memory M41 stores the received ink fountain key opening amount. The memory M42 stores a target ink fountain key opening amount. The memory M43 stores the count value of the counter 24G. The memory M44 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. 21: YES in step S301), the CPU 24A stores the received opening amount in the memory M41 (step S302) and print job switching. A reception completion signal of the ink fountain key opening amount is transmitted to the control device 19 (step S303). Further, the received opening amount is stored in the memory M42 as a target opening amount (step S304).

  Then, the count value of the counter 24G is read (step S305), the current ink fountain key opening amount is obtained from the read count value of the counter 24G (step S306), and the target opening amount is read from the memory M42 (step S307). If the current ink fountain key opening amount is the same as the target opening amount (YES in step S308), the process immediately proceeds to step S317 (FIG. 22), 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 S308), 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 S309 to S316), an ink fountain key opening amount setting completion signal is output to the print job switching control device 19 (step S317).

  After outputting the ink fountain key opening amount setting completion signal to the print job switching control device 19, the CPU 24A receives the ink fountain key opening amount setting completion signal from the print job switching control device 19 (YES in step S318). ), The output of the ink fountain key opening amount setting completion signal to the print job switching control device 19 is stopped (step S319).

[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 ... indicator, @ 19 F ... output device, 19G ... memory, 19H ₁ ~19Hn ... colorimeter, 19I ₁ ~ 19 In: A / D converter, 19 K: Driving motor driver, 19 L: Rotary encoder for driving motor, 19 M: Counter for detecting rotational phase of printing press, 19 N: D / A converter, 19 P: Origin position of printing press Discharger, 19Q: Counter for counting the number of rotations of the printing press, 19-1 to 19-8: Input / output interface (I / O, I / F), 20: Inline density measuring device, 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 SW 1... Print stop switch SW 2.

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
A density measuring means for measuring a density value of a printed matter printed by the printing machine while the printed matter is conveyed in the printing press;
Whether the printed matter printed by the trial printing means is a printed matter to be measured, and whether the density value of the printed matter to be measured measured by the density measuring means during conveyance in the printing machine is within an allowable range. Check and if it is within the permissible range, the printing of the printed matter by the trial printing means is continued and shifted to the main printing, and the number of the printed matter to be measured has reached a predetermined number of measurement finishes. In this case, a control device for a printing press, comprising: a full-print transition means for canceling printing . 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 being transported in the printing machine by the density measuring means. It is checked whether or not the measured density value of the printed material to be measured is within an allowable range. If the density value is within the allowable range, printing of the printed material by the trial printing means is continued as it is for the main printing. On the other hand, if 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 where the ink film thickness distribution is adjusted. A control device for a printing press characterized by repeating the check whether the density value of the printed material to be measured is within an allowable range as the next printed material to be measured. 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 while the printed matter is being conveyed in the printing press;
Whether the printed matter printed by the trial printing step is a printed matter to be measured, and whether the density value of the printed matter to be measured measured during conveyance in the printing press by the density measuring step is within an allowable range. Check and if it is within the allowable range, the printing of the printed matter is continued as it is in the trial printing step, and the printing is shifted to the final printing, and the number of the printed matter to be measured has reached the predetermined number of measurement finishes. In this case, the final printing transition step to cancel printing and
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 matter printed by the trial printing step 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 being conveyed in the printing press by the density measurement step. It is checked whether or not the measured density value of the printed material to be measured is within an allowable range. If the density value is within the allowable range, printing of the printed material by the trial printing step is continued as it is for final printing. On the other hand, if the ink film thickness distribution is not within the allowable range, the ink film thickness distribution formed by the ink preset step is adjusted, and the printed matter printed by the trial printing step with the ink film thickness distribution adjusted is obtained. the next printed material to be measured, to characterized in that the density value of the printed material of the measurement object is repeated for checking whether within the permissible range Control method for a printing press.

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