JP2015063081A - Printing preparation method of printer and printing preparation assisting device of printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the time required for job change and occurrence of paper loss by suppressing an operation for adjusting ink film thickness in advance to minimum necessity.SOLUTION: When changing a job from a current print job to a next print job, following steps are performed in the order : an inker reset step in which a print paper of a first set value is used to activate a printer for reducing an ink film thickness in an inker ; a printing cylinder cleaning step in which a print paper of a second set value is used to activate the printer for reducing an ink film thickness of a printing cylinder ; a pre-inking step in which ink supply of a third set value is applied to the inker to form an ink film thickness corresponding to a next print job ; and a trial printing print step in which a print paper of a fourth set value is used to perform trial printing. The set value is set according to a job change mode that is specified by combination of a current print condition including a kind of print material and a characteristic of a print pattern in a current print job and a next print condition including a kind of print material and a characteristic of a print pattern in a next print job.

Description

  The present invention relates to a printing preparation method for a printing press and a printing preparation support apparatus for the printing press.

  Printing machines that perform printing using plates and inks are widely used for commercial printing because they are excellent in terms of ensuring printing quality and reducing the printing unit price by mass printing. However, in order to respond to a new print job, it is necessary to prepare for printing such as changing the plate, changing the size and type of printing paper, cleaning the blanket, and readjusting the ink film thickness of the ink rollers in the inker. Needed in advance.

  In commercial printing, improving productivity and reducing costs are important issues. Regarding such printing preparation, shortening the printing preparation time, saving labor for printing preparation, and the stage of printing preparation Saving the printing materials consumed by the printer is effective in improving productivity and reducing costs. From this point of view, as disclosed in Patent Documents 1 and 2, for example, various techniques relating to print preparation have been developed.

  Patent Document 1 discloses that a minimum ink film required during printing is performed on an ink roller group in an inker by turning off the calling operation of the ink transfer roller and performing printing with the old printing plate mounted. After performing an ink removing operation that leaves a thickness distribution, a technology related to ink film thickness control is disclosed in which the ink film thickness distribution is superimposed on the ink film thickness distribution according to the pattern of the new printing plate by a pre-inking operation. .

  In this technology, the density of each color is measured from the color patch of the actual printing sample of the old printing plate, and the measured density value of each color is compared with a predetermined standard density value of each color. When there is a difference between the measured density value, the number of removed colors of each color determined corresponding to the variation value of the measured density value with respect to the reference density value is used as the number of printed sheets in the ink removing operation. As a result, the minimum ink film thickness distribution required during printing is accurately left in the ink roller group in the inker, reducing the operator's workload and reducing the print preparation time. It is said that the production cost can be reduced.

  In Patent Document 2, after the printing is completed, the uppermost ink calling roller of the inker is removed, the supply of ink to the blanket cylinder is shut off, the printer is operated in this state, and a predetermined preset value is set. A technique for transferring and removing ink stains adhering to a blanket cylinder by passing a printing sheet as many as the number of printing sheets is disclosed. Thereby, it is said that the ink stain on the blanket cylinder can be easily removed without using a cleaning liquid.

JP-A-11-188849 JP 2008-18608 A

In the technique of the above-mentioned patent document 1, since the number of ink removing operations is set based on the measured density value information of the printed material by the old printing plate, that is, the print job to be completed (current print job), the ink in the inker It is considered that the minimum ink film thickness distribution required during printing can be formed on the roller group.
However, in the ink removal of this technique, no consideration is given to a print job (next print job) to be started next, and only a minimum ink film thickness distribution is uniformly formed. For this reason, depending on the combination of the current print job and the next print job, the number of ink removing operations and pre-inking operations may be unnecessarily increased. There is a problem that the occurrence of the problem increases.

  For example, even when the ink film thickness distribution according to the pattern of the old printing plate used in the current job is thick and the ink film thickness distribution according to the pattern of the new printing plate used in the next job is thick, After the ink film thickness distribution corresponding to the old printing plate is once removed to the minimum ink film thickness distribution by the ink removing operation, the ink film thickness distribution corresponding to the new printing plate is added to this minimum ink film thickness distribution. They are tatami mated. In this case, it is necessary to increase the number of ink removing operations and the number of pre-inking operations, the time required for job change increases, and the occurrence of waste paper also increases.

  In recent years, in particular, due to the diversification of printing needs, even printing machines that are advantageous for large-scale printing have a need for small-lot printing with a small number of printing and proof printing with a very small number of printing because of its excellent printing quality. It is increasing. In this case, since multi-job printing that processes a large number of print jobs in one day operation increases, reduction of time required for job change and reduction of generated waste paper are important issues.

  The present invention has been devised in view of such problems, and minimizes the operation of reducing the ink film thickness (ink removing operation) and the operation of forming a predetermined ink film thickness (pre-inking operation). It is an object of the present invention to provide a printing preparation method for a printing press and a printing preparation support device for a printing press that can further reduce the time required for the change and the occurrence of waste paper.

  (1) According to the printing preparation method of the printing press of the present invention, when changing the job from the current print job to the next print job, the ink supply from the ink supply source to the inker is cut off to use the first set amount of printing paper. An inker reset step for operating the printing machine to reduce the ink film thickness in the inker, and shutting off the ink supply from the inker to the printing cylinder and operating the printing machine using a second set amount of printing paper A printing cylinder cleaning step for reducing the ink film thickness of the printing cylinder, and supplying a third set amount of ink from the ink supply source to the inker to form an ink film thickness corresponding to the next print job on the inker A pre-inking step, and a trial printing step for performing trial printing using a fourth set amount of printing paper, in that order. In other words, at least the first set amount and the third set amount are the current print condition that is the print condition including the type of print material and the characteristics of the print pattern in the current print job, and the type and print of the print material in the next print job It is variably set corresponding to the job change mode defined by the combination with the next printing condition which is the printing condition including the characteristic of the pattern.

  (2) It further includes a next print job condition setting step for setting the print condition of the next print job, and a plate exchange step for exchanging the printing plate, and the processing of the next print job condition setting step is for printing the current print job. Depending on the conditions, it is selectively switched between before the inker reset step and after the printing cylinder cleaning step, and the plate replacement step includes the printing cylinder cleaning step and the pre-inking step. It is preferable to carry out in between.

  (3) When the job change mode is a mode in which the history of the current print job is predicted not to disappear only by the printing cylinder cleaning step, the printing cylinder is removed using a cleaning liquid following the printing cylinder cleaning step. A printing cylinder cleaning step for cleaning, and after cleaning to cut off the ink supply from the inker to the printing cylinder and operate the printing machine using a fifth set amount of printing paper to reduce the ink film thickness of the printing cylinder A printing cylinder cleaning step is preferably added and performed in this order.

(4) a printing cylinder cleaning step of cleaning the printing cylinder with a cleaning liquid after the trial printing step when the history of the current print job does not disappear as a result of the trial printing in the trial printing step; A post-cleaning printing cylinder cleaning step of shutting off ink supply from the inker to the printing cylinder and operating the printer using a sixth set amount of printing paper to reduce the ink film thickness of the printing cylinder; It is preferable to add and carry out in this order.
(5) It is preferable that the type of the printing material includes a paper type of printing paper, and the characteristics of the printed pattern include a pattern weight characteristic corresponding to a line rate of the printed pattern.

  (6) The printing preparation support apparatus of the printing press according to the present invention includes the current printing condition, which is a printing condition including the type of printing material related to the current print job, and the characteristics of the printing pattern, the type of printing material related to the next printing job, and A print preparation sequence for a next print job corresponding to a job change mode defined by a combination with a next print condition that is a print condition including characteristics, and printing used in the processing steps of the job change mode and the print preparation sequence Storage means for storing the correspondence relationship with the set amount of paper, and at the time of job change, the print preparation sequence corresponding to the job change mode at this time and the set amount of the print paper are calculated from the correspondence relationship. A calculation unit, the print preparation sequence corresponding to the job change mode, and a set amount of the printing paper calculated by the calculation unit And a display means for displaying as the recommended information.

  (7) The printing preparation sequence includes an inker reset that cuts off the ink supply from the ink supply source to the inker and operates the printing machine using the first set amount of printing paper to reduce the ink film thickness in the inker. And a printing cylinder cleaning step that cuts off the ink supply from the inker to the printing cylinder and operates the printing machine using a second set amount of printing paper to reduce the ink film thickness of the printing cylinder; A pre-inking step in which a third set amount of ink is supplied from the ink supply source to the inker to form an ink film thickness corresponding to the next print job on the inker, and a fourth set amount of printing paper is used for the test. Including a test printing step for performing print printing, and an ink film thickness adjustment sequence for performing printing in this order, and setting a printing condition for the next printing job. And a plate replacement step for replacing the printing plate, wherein the next print job condition setting step corresponds to the print condition of the current print job, before the inker reset step and the printing cylinder cleaning step. Preferably, the plate exchange step is performed between the printing cylinder cleaning step and the preinking step.

  (8) If the print preparation sequence is a mode in which the history of the current print job is predicted not to disappear only by the print cylinder cleaning step, corresponding to the job change mode, the print cylinder cleaning step is followed. A printing cylinder cleaning step for cleaning the printing cylinder using a cleaning liquid, and subsequently, the ink supply from the inker to the printing cylinder is cut off and a fifth set amount of printing paper is used. And a post-cleaning printing cylinder cleaning step that operates to reduce the ink film thickness of the printing cylinder.

  (9) Change operation means for an operator to change the print preparation sequence and the set amount of the print paper displayed as the recommended information on the display means; and the print preparation sequence and the set amount of the print paper Approval operation means for the operator to perform an approval operation, and control means for receiving the approval operation by the approval operation means and operating the printing machine according to the print preparation sequence and the set amount of the printing paper. Preferably it is.

(10) It is preferable that the type of the printing material includes a paper type of the printing paper, and the characteristic of the printed pattern includes a pattern weight characteristic corresponding to a line rate of the printed pattern.
(11) The display unit includes a print pattern display unit that schematically displays the print patterns of the current print job and the next print job, respectively, or by overlapping the print patterns, and the operator can display the print pattern display unit based on the display by the print pattern display unit. It is preferable that characteristic input operation means for inputting and operating the pattern weight characteristic is provided.

  According to the present invention, when changing the job from the current print job to the next print job, the amount of printing paper used at the time of inker reset for reducing the ink film thickness in the inker, and the print cylinder and the inker according to the next print job The amount of ink supplied during pre-inking to form a thick ink film, the current printing conditions including the type of printing material and the characteristics of the printed pattern for the current print job, and the type of printing material and characteristics of the printed pattern for the next print job Is variably set corresponding to the job change mode defined by the combination with the next printing condition including. In other words, at the time of print preparation that changes from the current print job to the next print job, the amount of printing paper to be used and the amount of ink supplied for preinking are set based on the change in the type of printing material and the characteristics of the printed pattern. Printing paper and ink can be used for adjusting the ink film thickness without excess or deficiency, and it is possible to further reduce the time required for job change and the generation of waste paper.

It is a typical block diagram which shows the principal part and control apparatus of a printing press concerning embodiment of this invention. 1 is a schematic configuration diagram illustrating a sheet-fed printing press according to an embodiment of the present invention. It is a principal part side view of the printing machine which shows the ink supply state of the specific step of the printing preparation method concerning embodiment of this invention, (a) is the ink supply state of an inker reset step, (b) is a printing cylinder cleaning step. The ink supply state is shown. It is a flowchart which shows the 1st example of the procedure of the printing preparation method of the printing press concerning embodiment of this invention. It is a flowchart which shows the 2nd example of the procedure of the printing preparation method of the printing press concerning embodiment of this invention. It is a flowchart which shows the 3rd example of the procedure of the printing preparation method of the printing press concerning embodiment of this invention. It is a flowchart which shows the 4th example of the procedure of the printing preparation method of the printing press concerning embodiment of this invention. It is a time chart which shows the procedure of the printing preparation method of the printing press concerning embodiment of this invention. (A)-(c) is a figure explaining the pattern weight characteristic of the printed pattern concerning embodiment of this invention. It is a figure explaining the ink supply aspect of the pre-inking step of the printing preparation method concerning embodiment of this invention. It is a corresponding | compatible table which shows an example of the corresponding relationship memorize | stored in the memory | storage means of the printing preparation assistance apparatus of the printing press concerning embodiment of this invention. It is a figure which shows the example of a display of the job information input screen of the display (display means) of the control apparatus concerning embodiment of this invention. It is a figure which shows the example of a display of the preset screen of the display (display means) of the control apparatus concerning embodiment of this invention. (A)-(c) is a figure which shows the example of a display of the print preparation sequence screen of the display (display means) of the control apparatus concerning embodiment of this invention.

  Embodiments according to the present invention will be described below with reference to the drawings. Note that the embodiment described below is merely an example, and there is no intention to exclude various modifications and technical applications that are not explicitly described in the following embodiment. Each configuration of the following embodiments can be implemented with various modifications without departing from the spirit thereof, and can be selected or combined as appropriate.

[Overview of printing press]
FIG. 2 is a side view showing the printing machine according to the present embodiment. As shown in FIG. 2, the printing machine 1 is a sheet-fed printing machine, and includes a sheet feeding device 10 and a printing device as main components. A unit 20A and a paper discharge device 30 are provided. Then, the printing sheets (printing paper) 100 stacked on the paper feeding table 10a of the paper feeding device 10 are supplied one by one to the printing device unit 20A corresponding to the printing speed, and are provided in the printing device unit 20A. In addition, printing is performed on the printing sheet 100 by a plurality of sets of printing apparatuses 20a to 20d (indicated by reference numeral 20 when the printing apparatuses 20a to 20d are not distinguished from each other). It is conveyed to the stacking device 32. The operation of the printing press is controlled by a control device 40 described later. The printing machine 1 according to the present embodiment is a four-color sheet-fed printing machine, and the printing apparatus unit 20A is configured to print ink (k), indigo (c), and ink as ink colors along a conveyance path of the printing sheet. Printing units 20a, 20b, 20c, and 20d are installed for each of red (m) and yellow (y), and an inker (inking device) 21 is provided in each of the printing units 20a to 20d.

  An intermediate cylinder 22 is provided in the uppermost stream portion of the printing apparatus unit 20A, and the printing sheets 100 supplied one by one from the paper feeding apparatus 10 are guided to the intermediate cylinder 22 and introduced into each printing apparatus 20. Printed. Each printing apparatus 20 includes an inker 21 (see FIG. 1), a plate cylinder 24 having a printing plate 23 mounted on its outer periphery, a blanket cylinder 25 whose outer peripheral surface is in contact with the printing plate 23, and a pressure opposed to the blanket cylinder 25. An intermediate cylinder 27 is provided between the impression cylinders 26 of the adjacent printing apparatuses 20. The plate cylinder 24 and the blanket cylinder 25 are also collectively referred to as a printing cylinder.

  In each printing apparatus 20, the ink supplied from the inker 21 to the printing plate 23 is transferred to the outer periphery of the blanket cylinder 25, and this ink travels between the blanket cylinder 25 and the impression cylinder 26. Transferred to the printing surface. The printing sheet 100 is printed while being conveyed along the outer periphery of each impression cylinder 26, and is then conveyed along the outer periphery of the intermediate cylinder 27 to be sent to the impression cylinder 26 of the adjacent printing apparatus. Printing is performed in support of the above. Here, four colors [black (k), indigo (c), red (m), yellow (y)] are printed on the printing surface, which is one surface of the printing sheet 100, by four sets of printing apparatuses 20a to 20d. Then, the sheet is transferred by the endless chain 31 and stacked on the table of the sheet stacking device 32.

[Inker configuration]
Here, the inker (inking device) 21 will be described. As shown in FIG. 1, the inker 21 has an ink roller composed of an ink fountain roller 211, an ink key 212, and a side plate (not shown), an ink calling roller 213, and a number of ink rollers from upstream. A group 214 and an ink form roller 215 are provided.

  In the ink fountain 210 serving as an ink supply source, a plurality of inks stored in the ink fountain 210 are placed on the outer peripheral surface of the ink fountain roller 211 from the gap between each ink key 212 and the ink fountain roller 211 arranged in the bottom in the printing width direction. In addition, the ink is then supplied to the ink roller group 214 by an ink calling roller 213 that reciprocates between the most upstream ink roller in the ink roller group 214 and the ink source roller 211.

  The ink roller group 214 includes a large number of ink rollers, and some of these ink rollers knead ink in the axial direction and feed the ink downstream. Eventually, ink is applied to the surface of the printing plate 23 mounted on the outer periphery of the plate cylinder 24 from a plurality of (here, four) disposed around the plate cylinder 24 from the ink roller group 214. Supplied. The surface of the printing plate 23 of the plate cylinder 24 is in contact with a not-shown watering roller, and dampening water is supplied to the surface of the printing plate 23 by a dampening device (not shown).

[Control device for printing press]
The control device 40 of the printing press controls the operation of the printing press 1 and executes control for print preparation and processing for supporting print preparation. Therefore, the control device 40 constitutes a print preparation support device according to the present embodiment. The control device 40 is a computer, and includes an input / output unit (I / O) 41, a processing unit 42, and a storage unit 43. The control device 40 may be configured using a so-called personal computer, or may be configured by combining a CPU (Central Processing Unit) and a memory.

  The processing unit 42 sends a control signal to the control target of the printing press 1 via the input / output unit 41 to control the operation of the printing press 1, and information used for controlling the printing press 1 from sensors of the printing press 1. And information on the status of the printing press 1 is received. Information used for controlling the printing press 1 and information related to the state of the printing press 1 are sent to the processing unit 42 of the control device 40 in the form of electrical signals. The processing unit 42 is composed of a CPU, reads and interprets a program (computer program) stored in the storage unit 43, and executes the processing.

  Note that the processing unit 42 may be realized by dedicated hardware. In addition, the computer program for realizing the function of the processing unit 42 is recorded on a computer-readable recording medium, and the computer program recorded on the recording medium is read into the computer system and executed. Such a plate exchange control processing procedure may be executed. The “computer system” here includes an OS and hardware such as peripheral devices.

  The control device 40 is connected to a display device (display means) 44 that displays an image on the screen 44a using image display data obtained by processing the image data by the processing unit 42. Note that a keyboard and a mouse (not shown) are connected to the control device 40 and function as an operation means for an operator to perform input, selection, approval operation, and the like. Further, a so-called touch panel display may be applied to the display device 44, and a touch operation switch or the like may be formed to function as an operation unit.

[Printing preparation support apparatus and printing preparation method]
Here, a print preparation support apparatus and a print preparation method according to the present embodiment will be described. This print preparation support apparatus mainly supports print preparation when changing the job from the current print job (also simply referred to as the current job) to the next print job (also simply referred to as the next job). It is intended to assist in preparing for adjustments.

  One of the important preparations when changing jobs is the ink film thickness to be formed on the outer periphery of each ink roller and ink form roller 215 of the ink roller group 214 of the inker 21 and the printing cylinder (plate cylinder 24 and blanket cylinder 25). There is processing to adjust appropriately.

[Print preparation method]
First, an overview of a print preparation procedure (print preparation sequence) at the time of job change will be described focusing on this ink film thickness adjustment.
The basic steps of the print preparation sequence in this case include an inker reset step, a printing cylinder cleaning step, a pre-inking step, and a trial printing step.

  In the inker reset step, as shown in FIG. 3A, the ink calling roller 213 is turned off (calling stopped), the ink supply from the ink fountain 210 (ink supply source) to the inker 21 is cut off, and the printing press 1 is started. The ink is moved to move the ink from the inker 21 to the printing sheet 100 to reduce the ink film thickness in the inker 21 (this process is also called ink removing). In this case, the ink film thickness at the portion blackened in FIG.

  In the printing cylinder cleaning step, as shown in FIG. 3B, the ink form roller 215 is separated from the surface of the plate cylinder 24 (press plate 23), and the printing cylinder (the plate cylinder 24 and the blanket cylinder 25) is moved from the inker 21. The ink supply to the printer is cut off and the printer 1 is operated to move the ink from the printing cylinders 24 and 25 to the printing sheet 100 to reduce the ink film thickness on the surfaces of the printing cylinders 24 and 25. In this case, the ink film thickness at the blackened portion in FIG.

  In the pre-inking step, ink is supplied from the ink fountain 210 (ink supply source) through the inker 21 to the printing cylinders 24 and 25, and the ink rollers and inks of the surface of the printing cylinders 24 and 25 and the ink roller group 214 of the inker 21 are printed. An ink film thickness corresponding to the next print job is formed on the surface of the form roller 215. Note that pre-inking is also referred to as ink preliminary supply (QSI: Quick Start Inking).

In the trial printing step, the next printing job is subjected to a trial printing while operating a printing color tone control device that measures the printing result with a color sensor and feedback-controls the ink supply amount.
The inker reset step, the printing cylinder cleaning step, the pre-inking step, and the trial printing step are performed in this order.
The print preparation sequence includes the next print job condition setting step for setting the contents of the next print job (next print job condition) in these steps, and the printing plate from the current print job to the next print job. A plate exchange step to be exchanged is added, and a print preparation sequence to which these are added is set corresponding to a job change mode or the like related to a change of a print job.

FIG. 4 is a flowchart showing a basic print preparation sequence at the time of job change. Next print job condition setting step S2, inker reset step S10, printing cylinder cleaning step (plate blank cleaning step) S20, plate replacement step S30, plain The king step S40 and the trial printing step S50 are performed in this order.
In the pre-inking step S40, the first pre-inking for forming the minimum ink film thickness required during printing on the ink roller group in the inker from the beginning (from the ink film thickness 0) at the start of work or when changing the ink. Step (pre-inking step 1) S42 and the second pre-inking for forming the ink film thickness according to the request of the next print job from the already existing basic ink film thickness (that is, considering the pattern and paper quality) Step (preinking step 2) S44, the first preinking step S42 is performed as necessary, and the second preinking step S44 is basically always performed.

  The number of print sheets used (pass through) in the inker reset step S10 (first set number as the first set amount), the number of print sheets used (pass through) in the printing cylinder cleaning step S20 (second set) The second set number of sheets as the amount), the number of ink calling operations of the ink calling roller 213 performed in the first pre-inking step S42 of the pre-inking step S40 (the third set number of times as the third set amount), and the pre-inking step S40 The number of ink calling operations of the ink calling roller 213 (third set number as the third set amount) performed in the second pre-inking step S44, the number of printing papers (fourth) to be used (pass through) in the trial printing step. For the fourth set number of sheets as the set amount), the set values A1, B1, C1 D1, E1 is set.

  The setting values A1 (first setting amount), B1 (second setting amount), C1 (third setting amount), D1 (third setting amount), and E1 (fourth setting amount) are set in the current print job. Variable according to the job change mode defined by the combination of the current printing conditions including the type of printing material and the characteristics of the printing pattern and the next printing condition including the type of printing material and the characteristics of the printing pattern in the next print job Set to. In the print preparation sequences of the following other patterns, each set value (each set amount) is the same as the current printing conditions including the type of printing material and print pattern in the current print job, and the type of printing material in the next print job. And variably set corresponding to the job change mode defined by the combination with the next printing condition including the characteristics of the print pattern. Details will be described later.

  FIG. 5 is a modification of FIG. 4 and is a flowchart showing a print preparation sequence when the next print job condition setting step S22 is performed after the print cylinder cleaning step S20. In this print preparation sequence, an inker reset step S10, a printing cylinder cleaning step (plate blank cleaning step) S20, a next job condition setting step, a next print job condition setting step S22, a plate replacement step S30, a preinking step S40, and a trial printing step S50 is performed in this order.

Here, as the pre-inking step S40, a second pre-inking step (pre-inking step 2) S44 for forming an ink film thickness according to the request of the next print job from a state where there is a basic ink film thickness is performed.
In this print preparation sequence, the pattern history of the current print job is erased by the inker reset step S10 and the printing cylinder cleaning step (plate blank cleaning step) S20, and these steps are also referred to as a pattern history erase mode. Further, since the plate exchange step S30, the second pre-inking step S44, and the trial printing step S50 range from plate exchange to the start of the next print job, these steps are also called a plate exchange start mode.

  Also in this case, the number of print sheets used (pass through) in the inker reset step S10 (first set number as the first set amount), and the number of print sheets used (pass through) in the printing cylinder cleaning step S20. (Second set number as the second set amount), the number of ink call operations of the ink call roller 213 performed in the second pre-inking step S44 of the pre-inking step S40 (the third set number of times as the third set amount), the test Set values A2, B2, D2, and E2 are appropriately set for the number of print sheets (fourth set number as the fourth set amount) to be used (passed through) in the printing step.

  The next print job condition setting step S22 is provided after the print cylinder cleaning step S20 based on the print conditions of the current print job, and particularly based on the paper quality of the current print job. When the print paper of the current print job has good ink consumption and is inexpensive, the next print job condition setting step S22 is performed after the print cylinder cleaning step S20.

  In other words, if the paper quality of the printing paper of the current print job is good in ink consumption, the pattern history erasing mode can be performed efficiently with less paper consumption. Further, if the price of the printing paper for the current print job is low, the cost of paper consumed in the pattern history erasing mode can be suppressed. As the printing paper with good ink consumption and low price, one or more specific types of printing paper are selected and set in advance from both the paper quality and price.

  Even if the print paper for the next print job is changed, the quality of the print paper for the current print job is not superior in terms of ink consumption and price. Therefore, after performing the pattern history erasing mode (inker reset step S10 and printing cylinder cleaning step S20), the time and cost required for the pattern history erasing mode are suppressed by performing the next print job condition setting step S22. .

  In this embodiment, high-quality paper and coated paper are exemplified as printing paper. However, since coated paper consumes more ink and is cheaper than high-quality paper, the specific type of this printing paper is When it becomes coated paper and the printing paper of the current print job is coated paper, the next print job condition setting step S22 is performed after the printing cylinder cleaning step S20.

Moreover, in the case of this print preparation sequence, in parallel with the execution of the next print job condition setting step S22, the plate exchange step S30 accompanying this print job change can be performed without any trouble, and the preparation work time can be shortened. it can.
In addition, as an incidental operation of the next print job condition setting step S22, there is an operation (paper stacking) of changing the print paper to the print paper used in the next print job. However, the paper is stacked on the paper feed table while being stacked. It takes time. By carrying out the paper stacking operation and the plate exchanging operation in parallel by different operators, the preparation work time can be further shortened.
As described above, the print preparation sequence is variably set corresponding to the print paper of the current print job.

  FIG. 6 is a flowchart showing a print preparation sequence at the time of a job change in which the image history of the current print job has a great influence on the next print job. Is also set corresponding to the job change mode. In this print preparation sequence, the next print job condition setting step S2, the inker reset step S10, the printing cylinder cleaning step (plate blank cleaning step) S20, and the printing cylinder cleaning step (bran cleaning step) S24 for cleaning the printing cylinder using the cleaning liquid. The printing cylinder cleaning step (plate blank cleaning step) S26, the plate replacement step S30, the pre-inking step S40, and the trial printing step S50 are performed in this order.

In this case as well, as the pre-inking step S40, a second pre-inking step (pre-inking step 2) S44 for forming an ink film thickness according to the request of the next print job from a state where there is a basic ink film thickness is performed.
In this printing preparation sequence, a printing cylinder cleaning step S24 and a printing cylinder cleaning step S26 are added to the basic printing preparation sequence shown in FIG. 4 to reduce the printing cylinder ink in a short time using the cleaning liquid. The pattern history is erased, and the cleaning liquid remaining on the printing cylinder is removed by subsequent printing cylinder cleaning.

  Also in this case, the number of print sheets used (pass through) in the inker reset step S10 (first set number as the first set amount), and the number of print sheets used (pass through) in the printing cylinder cleaning step S20. (The second set number as the second set amount), the number of print sheets to be used (pass through) in the printing cylinder cleaning step S26 (the fifth set number as the fifth set amount), the second set in the preinking step S40 The number of ink call operations of the ink call roller 213 (third set number as the third set amount) performed in the pre-inking step S44, the number of print sheets (fourth set amount) used (pass through the paper) in the trial printing step. Set value A3, B3, B4, D3, and E3 are appropriately set.

  FIG. 7 is a flowchart showing a print preparation sequence at the time of a job change in which the image history of the current print job has a greater influence on the next print job. Again, not only the print conditions of the next print job but also the print conditions of the current print job In other words, it is set corresponding to the job change mode, or set while looking at the result of the trial printing. In this print preparation sequence, the next print job condition setting step S2, the inker reset step S10, the printing cylinder cleaning step (plate blank cleaning step) S20, the plate replacement step S30, the pre-inking step S40, the trial printing step S50, and the cleaning liquid are used. A printing cylinder cleaning step (blan cleaning step) S60 for cleaning the printing cylinder, a printing cylinder cleaning step (plate blank cleaning step) S70, a pre-inking step S80, and a trial printing step S90 are performed in this order.

Here again, as preinking steps S40 and S80, a second preinking step (preinking step 2) S44 for forming an ink film thickness according to the request of the next print job from a state where there is a basic ink film thickness is provided. Do.
This printing preparation sequence is removed by adding a printing cylinder cleaning step S60, a printing cylinder cleaning step S70, a preinking step S80, and a trial printing step S90 after the basic printing preparation sequence at the time of job change in FIG. The ink of the printing cylinder that has not been removed is reduced in a short time by using the cleaning liquid to erase the pattern history, and the cleaning liquid remaining on the printing cylinder is removed by subsequent printing cylinder cleaning.

  In this case as well, the number of print sheets used (pass through) in the inker reset step S10 (the first set number as the first set amount) and the print sheets used (pass through) in the print cylinder cleaning step S20 are used. The number of sheets (second set number as the second set amount) and the number of ink call operations of the ink call roller 213 performed in the second pre-inking step S44 of the pre-inking step S40 (third set number of times as the third set amount) And the number of print sheets (fourth set number as the fourth set amount) used in the trial printing step (fourth set amount) and the number of print sheets used (pass through) in the printing cylinder cleaning step S60 6th set number of sheets as a 6th set amount) and the second pre-inking step of pre-inking step S80 44, the number of ink calling operations of the ink calling roller 213 (the seventh set number as the seventh set amount), and the number of print sheets (paper passing) used in the trial printing step 90 (as the eighth set amount). Set value A4, B5, D4, E4, B6, D5, and E5 are set as appropriate.

  In addition, when the degree of achievement of the target density value at the end of school at the time of one-day operation is imaged, it is as shown in FIG. 8, and at the start of operation, among the basic print preparation sequence shown in FIG. The inker reset step S10 and the printing cylinder cleaning step S20 are not necessary, and the first pre-inking step (QSI-1) S42, the second pre-inking step (QSI-2) S44, and the trial printing step (here, 30 sheets) are performed. Then, after measuring the printing of the trial printing, the second pre-inking step (QSI-2D) and the trial printing step (here, 30 sheets) are performed again as necessary.

  When the job is changed thereafter, the inker reset step S10 and the printing cylinder cleaning step S20 are reset, the second pre-inking step (QSI-2) S44, and the trial printing step (30 sheets in this case) are performed. After measuring the printing, the second pre-inking step (QSI-2D) and the trial printing step (here, 30 sheets) are performed again as necessary.

  The “target density value” is obtained according to the “ink film thickness”, and each set amount of the print preparation sequence such as the number of paper passing and the number of ink calling operations is set at the end of each print job. The thickness is adjusted so as to reach a thickness corresponding to the target density value.

[Print preparation support device]
As shown in FIG. 1, the print preparation support apparatus includes specific functional elements respectively assigned to a storage unit (storage unit) 43, a processing unit 42, and a display device 44 of the control device 40.
That is, the storage unit 43 stores the print preparation sequence for the next print job corresponding to the job change mode for changing the print job, and the amount of print sheets used in the processing steps of the job change mode and the print preparation sequence. Between the set value (set amount, here, the set number of sheets) and the setting value (set amount, here, the set number) of the ink call operation of the ink call roller 213 and the number of processes in the processing step, that is, the job change mode Further, a correspondence relationship in which the set number of sheets for printing and the number of ink calling operations of the ink calling roller 213 are associated with the number of processing steps in the processing step is preset and stored.

When the job is changed, the processing unit 42 determines the set number of print sheets corresponding to the job change mode at this time and the ink call roller 213 from the type of job change mode corresponding to the job change and the correspondence relationship. A calculation unit (calculation means) 42a for calculating the number of ink calling operations and the number of times of processing in the processing step is provided.
When changing the job, the display device 44 recommends the print preparation sequence corresponding to the job change mode at this time, the set number of print sheets calculated by the calculation unit 42a, and the number of ink call operations of the ink call roller 213. It has a function to display on the screen 44a as information.

Job change mode refers to the current printing conditions including the type of printing material and print pattern in the current print job, the type of printing material in the next print job, It is specified in combination with the following printing conditions including the characteristics of the printed pattern.
Here, the printing material is paper (printing sheet) and ink used for printing, and the type of printing material is the type of printing paper (printing sheet) (paper type) and the type of ink. Become. The ink film thickness required for the rollers of the inker 21 and the surfaces of the printing cylinders 24 and 25 during printing corresponds to the paper type and printing pattern of the printing paper.

  Typical examples of printing paper include high-quality paper and coated paper. Generally, high-quality paper tends to have a lower density than coated paper. For this reason, when trying to print a pattern with the same line-drawing ratio at the same color development level, high-quality paper requires more ink than coated paper. For example, there is a well-known API function (auto-preset inking function) as a function that correlates the stroke rate of the printed pattern and the key opening degree 212 of the ink key, and the API function is optimal depending on the paper type. Should be used, and the key opening 212 of the ink key for the same image rate should be greater for fine paper than for coated paper.

Therefore, after printing using high-quality paper, a relatively large amount of ink (with a large ink film thickness) remains on the surface of each roller of the inker 21 and the printing cylinders 24 and 25. On the other hand, after printing using coated paper, a relatively small amount of ink (small ink film thickness) remains on the surfaces of the rollers of the inker 21 and the printing cylinders 24 and 25.
In addition, before printing using high quality paper, if a relatively large amount of ink (with a large ink film thickness) is supplied to the surfaces of the rollers of the inker 21 and the printing cylinders 24 and 25, printing starts. From the beginning, the ink amount (ink film thickness) is close to the appropriate level. On the other hand, before printing using coated paper, if a relatively small amount of ink (small ink film thickness) is supplied to the rollers of the inker 21 and the surfaces of the printing cylinders 24 and 25, printing starts. From the beginning, the ink amount (ink film thickness) is close to the appropriate level.

From this point of view, it can be seen that the adjustment of the ink film thickness is related to the paper type of the print paper used in the current print job and the paper type of the print paper used in the next print job.
Further, the characteristics of the printed pattern is a characteristic (pattern weight characteristic) corresponding to the line rate of the printed pattern. This pattern weight characteristic means that a printed pattern with a high image rate (that is, a printed image with a large amount of ink used) is “heavy” and a printed pattern with a low image rate (that is, a printed image with a small amount of ink to be used). ) Is "light". For example, the pattern weight characteristics can be classified into three levels of “heavy”, “medium”, and “light” according to the line drawing rate.

  At this time, it is possible to classify the pattern weight characteristics based on the average line drawing rate of the entire printed pattern, or the line drawing rate of the area where the line drawing rate is the highest in the printed pattern (however, the area of a certain size or more). Any method can be applied to classify the pattern weight characteristics, but any method can be applied, but considering the effect of the ink history of the current print job on the next print job, the latter, that is, the line drawing rate in the print pattern is the most. It is preferable to classify the pattern weight characteristics according to the line drawing rate of a high region.

Of course, a pattern with a high image rate requires more ink than a pattern with a low image rate.
For example, after printing a pattern with a high image area ratio, a relatively large amount of ink (with a large ink film thickness) remains on the surface of each roller of the inker 21 and the printing cylinders 24 and 25. On the other hand, after printing a pattern with a low image area ratio, a relatively small amount of ink (small ink film thickness) remains on the surface of each roller of the inker 21 and the printing cylinders 24 and 25. For example, when the pattern weight of the current print job is heavy as shown in FIG. 9A and the pattern weight of the next print job is light as shown in FIG. 9B, when the next print job is executed, FIG. As shown in (c), the pattern history of the current print job remains in the pattern of the next print job. The degree of influence of the pattern history can be calculated from the difference between the image data in the PPF (Print Production Format) file of each print job.

  Further, the display device 44 has a function of displaying the print patterns of the current print job and the next print job in a schematic manner by overlapping each other as shown in FIGS. 9A and 9B or as shown in FIG. 9C. (Printed picture display unit) may be provided, and characteristic input operation means (input display or the like) may be provided for the operator to input a picture weight characteristic based on the display by the printed picture display unit.

  In addition, before printing a pattern with a high image area ratio, if a relatively large amount of ink (with a large ink film thickness) is supplied to the surface of each roller of the inker 21 and the printing cylinders 24 and 25, printing is performed. From the beginning, the ink amount (ink film thickness) is close to the appropriate level. On the other hand, if a relatively small amount of ink (with a small ink film thickness) is supplied to the surface of each roller of the inker 21 and the printing cylinders 24 and 25 before printing a pattern with a low image area ratio, printing is performed. From the beginning, the ink amount (ink film thickness) is close to the appropriate level.

From this point of view, the adjustment of the ink film thickness is related to the line rate (pattern weight characteristic) of the print pattern of the current print job and the line rate (pattern weight characteristic) of the print pattern of the next print job. Recognize.
In the present embodiment, the job change mode includes the current printing conditions determined by the paper type of the printing paper in the current print job and the pattern weight characteristic of the printing pattern, and the paper type and printing pattern of the printing paper in the next print job. It is defined by a combination with the next printing condition determined by the weight characteristic.

  For example, if the paper type of the printing paper is either high-quality paper or coated paper, and the pattern weight characteristic is either heavy, medium, or light, the printing condition is a combination of high-quality paper and pattern weight characteristics (printing) Condition 1), a combination of high-quality paper and pattern weight characteristics (printing condition 2), a combination of high-quality paper and pattern weight characteristics (printing condition 3), and a combination of coated paper and pattern weight characteristics that are light ( There are six types: a printing condition 4), a combination of medium coated paper and pattern weight characteristics (printing condition 5), and a combination of heavy coated paper and pattern weight characteristics (printing condition 6).

  The job change mode includes a change from print condition 1 to print condition 2 (mode 1), a change from print condition 1 to print condition 3 (mode 2), and a change from print condition 1 to print condition 4 (mode). 3), change from print condition 1 to print condition 5 (mode 4), change from print condition 1 to print condition 6 (mode 5), change from print condition 2 to print condition 1 (mode 6) A change from print condition 2 to print condition 3 (mode 7), a change from print condition 2 to print condition 4 (mode 8), a change from print condition 2 to print condition 5 (mode 9), Change from print condition 2 to print condition 6 (mode 10), change from print condition 3 to print condition 1 (mode 11), change from print condition 3 to print condition 2 (mode 12), print condition 3 to printing condition 4 (mode 13) and printing condition Change from print condition 5 (mode 14), change from print condition 3 to print condition 6 (mode 15), change from print condition 4 to print condition 1 (mode 16), print from print condition 4 Change to condition 2 (mode 17), change from print condition 4 to print condition 3 (mode 18), change from print condition 4 to print condition 5 (mode 19), and print condition 4 to print condition 6 Change (mode 20), change from print condition 5 to print condition 1 (mode 21), change from print condition 5 to print condition 2 (mode 22), change from print condition 5 to print condition 3 Change (mode 23), change from print condition 5 to print condition 4 (mode 24), change from print condition 5 to print condition 6 (mode 25), change from print condition 6 to print condition 1 (mode 25) Mode 26) and printing condition 6 to printing condition 2 Change (mode 27), change from print condition 6 to print condition 3 (mode 28), change from print condition 6 to print condition 4 (mode 29), change from print condition 6 to print condition 5 There are 30 modes (mode 30).

  In the correspondence relationship, the number of printing sheets used (paper passing) in the inker reset step (first set number as the first set amount) and the printing cylinder cleaning step are used for such job change mode ( The number of printing sheets (second set number as the second set amount), the number of ink call operations of the ink call roller (third set number as the third set amount) performed in the pre-inking step, and the trial printing The number includes the number of print sheets (fourth set number as the fourth set amount) to be used (passed through) in the printing step.

  FIG. 11 is a table showing an example of a correspondence relationship relating to the set number of sheets. In FIG. 11, in the coated paper → coated paper column, coated paper → high quality paper column, high quality paper → coated paper column, high quality paper⇒ In each column of fine paper, “light” ⇒ “light”, “light” ⇒ “medium”, “light” ⇒ “heavy”, “medium” ⇒ “light”, “medium” ⇒ “medium”, “ There are a total of 36 modes, including those with no change in paper type and pattern weight characteristics, such as medium, heavy, heavy, light, heavy, medium, heavy, heavy, and heavy. Have been described.

In FIG. 11, m0 to m6 are set numbers, and have a magnitude relationship of m0 ≦ m1 ≦ m2 ≦ m3 ≦ m4 ≦ m5 ≦ m6, where m0 is 0. n0 to n5 are the number of ink calling operations of the ink calling roller performed in the second pre-inking step (QSI-2), and have a magnitude relationship of n0 ≦ n1 ≦ n2 ≦ n3 ≦ n4 ≦ n5, where n0 is 0 Yes.
Although the specific set number of sheets is not described, each set number is appropriately set based on the relationship between the current value of the ink amount in the inker and the next required value, and all of them are damaged before ten OK sheets are taken. Even if included, it was confirmed that it could be contained within about 100 sheets. In addition, in the method of adjusting the color only by the ink key opening by the conventional color management device, about 50 to 100 sheets of paper are used at a time, and the adjustment is repeated (about 3 to 5 times) until the color can be matched. As a result, a lot of time and paper were consumed in the preparation stage. However, using this function enabled a reduction in preparation time and a significant reduction in paper.

The correspondence relationship includes a job change mode corresponding to a print preparation sequence.
The print preparation support apparatus includes a change operation field on the screen 44a as a change operation means for the operator to change the print preparation sequence displayed on the screen 44a of the display device 44 as recommended information and the set amount of the print paper. The image is displayed, and the change operation can be performed using a touch panel, a keyboard, a mouse, or the like.

The print preparation support apparatus displays an image of the approval operation on the screen 44a as an approval operation means for the operator to perform an approval operation for the print preparation sequence, the set amount of printing paper, and the number of ink call operations of the ink call roller. The approval operation can be performed using a touch panel, a keyboard, a mouse, or the like.
Further, in the present print preparation support apparatus, as shown in FIG. 1, a processing unit is provided as a control unit that operates the printing press 1 according to the print preparation sequence and the set amount of printing paper in response to the approval operation by the approval operation unit. A print preparation control unit 42 b is provided in the printer 42.

  When the printing press 1 is operated by the printing preparation control unit 42b, printing is performed while measuring the density of the printing result while operating the above-described printing color tone control device. At this time, the printing density is slightly lower than the target density. An ink film thickness suitable for printing preparation can be formed by providing a threshold value and controlling the ink key 212 to be opened to fill the ink if it is less than this threshold value, and narrowing the ink key 212 if it is greater than or equal to the threshold value.

[Display image example of print preparation support]
12 to 14 are diagrams showing display examples of the screen 44a of the display device 44 of the print preparation support device. The job change operation using the print preparation support apparatus will be described with reference to this.
At the start of the job, for example, the job start image shown in FIG. 12 is displayed, and when the switch of the paper quality 441 is pointed, for example, in the “new” setting state, functions suitable for the paper such as an API function suitable for the paper Parameters are set automatically.

After the job starts, for example, a preset image shown in FIG. 13 is displayed. On this preset screen, the switches 443 to 445 such as “ink key”, “paper size”, “printing pressure” and the like are operated to perform presetting. Set the job.
When the preset button 442 is operated after the presetting, for example, a job change image shown in FIG. 14A is displayed. In this, a job change switch 446, a recommended print preparation sequence display 447, and each set number 448a are displayed. ~ 448c are displayed. If the operator operates the job change switch 446, the set number of sheets 448a to 448c and the print preparation sequence 447 can be changed.
When the job change switch 446 is operated, for example, a memory call registration screen shown in FIG. 14B is displayed, and a setting corresponding to the job change can be called from the memory call registration field 449 to change the setting. is there.

  Here, when the post-measurement mode is selected, for example, the post-measurement screen shown in FIG. 14C is displayed, and when the measurement of the print color tone by the print color control device is completed, the ink key transmission button 451a is operated to operate the ink key. When transmission is performed and the QSI-2D button 451b is operated to select ink key control, as shown in FIG. 10, the ink of the insufficient density portion is selected, and the second pre-inking step ( QSI-2D), a trial printing step (here, 30 sheets) is set. Of the steps of the print preparation sequence display 447, the step of executing the process is a display that can be identified by increasing the brightness (see reference numerals 450a and 450b).

[Action and effect]
Since the printing preparation method of the present printing press and the printing preparation support apparatus of the printing press are configured as described above, the inker that reduces the ink film thickness in the inker 21 when the job is changed from the current print job to the next print job. The number of printing paper used at the time of resetting and printing cylinder cleaning, the number of ink calling operations of the ink calling roller performed during pre-inking to form the ink film thickness corresponding to the next printing job on the printing cylinder and inker, etc. Corresponding to the job change mode defined by the combination of the current printing conditions including the type of printing material and the characteristics of the print pattern for the job, and the next printing conditions including the type of printing material and the characteristics of the print pattern for the next print job Because it is set to be variable, it is possible to use printing paper for adjusting the ink film thickness without excess or deficiency, and the time required for job change and waste paper It is possible to further reduce the occurrence.

In particular, by preparing for printing using the printing preparation support device of the printing press, anyone can easily use printing paper for adjusting the ink film thickness without excess or deficiency, and the time and loss required for job change can be reduced. It is possible to further reduce the generation of paper.
In addition, the print preparation sequence is also variably set according to the printing conditions of the current print job (such as the paper quality of the print paper). It becomes possible to further reduce the time required for the change and the generation of waste paper (the amount generated and the cost associated therewith).

In particular, the next print job condition setting step and the plate exchange step can be performed in parallel by performing the process of the next print job condition setting step after the printing cylinder cleaning step according to the job change mode. The time required for job change can be further reduced.
In the case of a job change mode in which the history of the current print job is expected not to be erased only by the printing cylinder cleaning step, the printing cylinder cleaning is performed to wash the printing cylinders 24 and 25 using a cleaning liquid following the printing cylinder cleaning step. By adding the step and the printing cylinder cleaning step after cleaning and performing in this order, the history of the current print job can be surely erased.

Furthermore, if the history of the current print job does not disappear as a result of the trial printing in the trial printing step, a printing cylinder cleaning step and a post-cleaning printing cylinder cleaning step are added after the trial printing step. By executing in order, the history of the current print job can be surely deleted.
In addition, the print preparation support device is provided with means for the operator to change the print preparation sequence and the set amount of printing paper, and the operator to perform an approval operation for the print preparation sequence and the set amount of print paper. In this case, convenience is improved.

Furthermore, if the printing preparation support apparatus performs control for operating the printing press 1 according to the printing preparation sequence and the set amount of printing paper, the burden on the operator is reduced.
If the print patterns of the current print job and the next print job are displayed on the display 44 in a superimposed manner, the operator can input the pattern weight characteristics based on this display, and the skill of the skilled operator can be improved. It can be demonstrated.

[Others]
As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment.
For example, it is effective to add not only paper types but also other material types such as ink types to the types of printing materials. Further, although coated paper and high-quality paper are exemplified as the paper type, the paper type is not limited to this.

As for the characteristics of the printed pattern, not only the concept of the pattern weight characteristic but also the image dose and the line rate of the pattern may be applied as they are.
Further, in the above embodiment, ink is supplied from the ink supply source to the inker by the ink calling roller 213 that reciprocates between the uppermost ink roller of the inker 21 and the ink base roller 211. The third set amount that defines the ink supply amount is the number of ink call operations of the ink call roller, but the ink supply method is not limited to this. For example, an ejection type ink supply pump may be used, and in this case, the third set amount is an ink ejection amount from the ink supply pump.

Furthermore, it is also effective to add the target density, the surface temperature of the plate cylinder / bran cylinder, the temperature of each roller related to ink supply, such as the ink source roller, to the printing conditions.
Furthermore, although the sheet-fed printing machine was illustrated, application to the rotary press which prints a continuous paper is also possible.

DESCRIPTION OF SYMBOLS 1 Printing machine 20,20a-20d Printing apparatus 21 Inker (inking apparatus)
24 Plate cylinder (print cylinder)
25 Blanket cylinder (print cylinder)
40 Control Device 42 Processing Unit 42a Calculation Unit (Calculation Unit)
42b Print preparation control unit 43 Storage unit (storage unit)
44 Display device (display means)
100 Printing sheet (printing paper)

Claims (11)

When changing the job from the current print job to the next print job,
An inker reset step in which the ink supply from the ink source to the inker is cut off and the printer is operated using a first set amount of printing paper to reduce the ink film thickness in the inker;
Printing cylinder cleaning that cuts off the ink supply from the inker to the printing cylinder (plate cylinder, blanket cylinder) and operates the printing machine using a second set amount of printing paper to reduce the ink film thickness of the printing cylinder Steps,
A pre-inking step of performing a third set amount of ink supply from the ink supply source to the inker to form an ink film thickness corresponding to the next print job on the inker;
A trial printing step of performing trial printing using a fourth set amount of printing paper, in this order,
Of the set amounts, at least the first set amount and the third set amount are a print condition including a print material type and a print pattern characteristic in the current print job, and a print material in the next print job. A printing preparation method for a printing press that is variably set in correspondence with a job change mode defined by a combination with a next printing condition that is a printing condition including the type of print and the characteristics of the print pattern. A next print job condition setting step for setting the print condition of the next print job,
A plate exchange step for exchanging the printing plate;
The process of the next print job condition setting step is performed by selectively switching between before the inker reset step and after the print cylinder cleaning step according to the print condition of the current print job,
2. The printing preparation method for a printing press according to claim 1, wherein the plate replacement step is performed between the printing cylinder cleaning step and the pre-inking step. If the job change mode is a mode in which the history of the current print job is predicted not to disappear only by the printing cylinder cleaning step, printing is performed to clean the printing cylinder using a cleaning liquid following the printing cylinder cleaning step. A cylinder cleaning step, and a post-cleaning printing cylinder cleaning that cuts off ink supply from the inker to the printing cylinder and operates the printer using a fifth set amount of printing paper to reduce the ink film thickness of the printing cylinder The printing preparation method for a printing press according to claim 1 or 2, wherein steps are added and executed in this order. If the history of the current print job does not disappear as a result of the trial printing in the trial printing step, the printing cylinder cleaning step of cleaning the printing cylinder using a cleaning liquid after the trial printing step; and the inker And a post-cleaning printing cylinder cleaning step of reducing the ink film thickness of the printing cylinder by operating the printing machine using a sixth set amount of printing paper by cutting off the ink supply to the printing cylinder from The printing preparation method for a printing press according to any one of claims 1 to 3, which is performed in this order. The type of the printing material includes a paper type of printing paper, and the characteristics of the printed pattern include a pattern weight characteristic corresponding to a line rate of the printed pattern. Printing preparation method for the printing press. Specified by a combination of the current printing conditions that are the printing conditions including the type of printing material and the characteristics of the print pattern for the current print job and the next printing conditions that are the printing conditions including the type of printing material and the characteristics of the printing pattern for the next print job Storage means for storing a print preparation sequence for the next print job corresponding to the job change mode to be performed, and a correspondence relationship between the job change mode and the set amount of print paper used in the processing steps of the print preparation sequence When,
An arithmetic means for calculating the print preparation sequence and the set amount of the printing paper according to the job change mode at this time from the correspondence when the job is changed,
A printing preparation support apparatus for a printing press comprising: the printing preparation sequence corresponding to the job change mode; and display means for displaying the set amount of the printing paper calculated by the calculating means as recommended information. The print preparation sequence is:
An inker reset step in which the ink supply from the ink source to the inker is cut off and the printer is operated using a first set amount of printing paper to reduce the ink film thickness in the inker;
A printing cylinder cleaning step of shutting off ink supply from the inker to the printing cylinder and operating the printing machine using a second set amount of printing paper to reduce the ink film thickness of the printing cylinder;
A pre-inking step of performing a third set amount of ink supply from the ink supply source to the inker to form an ink film thickness corresponding to the next print job on the inker;
A test printing step for performing a test printing using a fourth set amount of printing paper, and an ink film thickness adjustment sequence for performing in this order,
A next print job condition setting step for setting the print condition of the next print job,
A plate exchange step for exchanging the printing plate;
The next print job condition setting step is carried out by selectively switching between before the inker reset step and after the print cylinder cleaning step in accordance with the print condition of the current print job,
The printing preparation support apparatus for a printing press according to claim 6, wherein the plate exchange step is performed between the printing cylinder cleaning step and the pre-inking step. The print preparation sequence is:
Corresponding to the job change mode, in a mode where it is predicted that the history of the current print job will not be erased only by the printing cylinder cleaning step, the printing cylinder is removed using a cleaning liquid following the printing cylinder cleaning step. A printing cylinder cleaning step for cleaning, and subsequently, the ink supply from the inker to the printing cylinder is cut off, and the printing press is operated using a fifth set amount of printing paper, thereby forming an ink film on the printing cylinder. The printing preparation support apparatus for a printing press according to claim 6 or 7, further comprising a post-cleaning printing cylinder cleaning step for reducing the thickness. A change operation means for an operator to change the print preparation sequence displayed on the display means as the recommended information and the set amount of the printing paper;
An approval operation means for an operator to perform an approval operation on the print preparation sequence and the set amount of the printing paper;
The control unit according to any one of claims 6 to 8, further comprising: a control unit that operates the printing press according to the print preparation sequence and a set amount of the printing paper in response to an approval operation by the approval operation unit. The printing preparation support apparatus of the printing machine as described. The type of the printing material includes a paper type of printing paper, and the characteristic of the printed pattern includes a pattern weight characteristic corresponding to a line rate of the printed pattern. Printing preparation support device for printing press. The display means includes a print pattern display unit that schematically displays the print patterns of the current print job and the next print job, respectively or in a folded manner,
The printing preparation support apparatus for a printing press according to any one of claims 6 to 10, further comprising characteristic input operation means for an operator to input the pattern weight characteristic based on the display by the print picture display unit.

Images