JP5918917B1 - Offset rotary printing press and printing control method for offset rotary printing press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an offset rotary printing press capable of instantaneously correcting a sudden misregistration occurring after a paper splicing and capable of reducing equipment costs by diverting existing equipment, and a printing control method for the offset rotary printing press. I will provide a. An offset rotary printing press includes a printing unit, a paper feeding unit, and an outfeed roller mechanism. The printing unit can selectively execute feedback control that corrects the misregistration based on the misregistration detected by the automatic registration adjustment control unit and feedforward control that corrects the misregistration based on a predetermined set value. And is configured to switch from feedback control to feedforward control based on the paper splicing signal. The outfeed roller mechanism is configured to pull the continuous paper at a drawing rate lower than a preset normal drawing rate based on the paper splicing signal. [Selection] Figure 1

Description

  The present invention relates to an offset rotary printing press and a printing control method for an offset rotary printing press for correcting a misregistration that occurs after paper splicing.

  2. Description of the Related Art Conventionally, there are widely known multi-color offset rotary presses in which a plurality of printing units capable of printing different colors are arranged side by side in the vertical direction and overprinting is performed on continuous paper by the plurality of printing units. In such a multi-color offset rotary press, a predetermined tension is applied to the continuous paper, and dampening water and ink are supplied to the continuous paper from a plurality of printing units. However, there is a problem that misprinting (register misregistration) of the overprinted print image is likely to occur. For this reason, an automatic registration adjusting device and a plate cylinder fine adjustment mechanism for automatically correcting misregistration of a printed image overprinted by a plurality of printing units may be installed in a conventional multi-color offset rotary press. It is common.

  The conventional automatic registration adjustment device becomes the target when the positions of multiple registration marks printed on continuous paper by multiple printing units are read by the camera and the distance between the multiple registration marks exceeds a set value. The misregistration is corrected by so-called feedback control, in which the plate cylinder of the printing unit is finely moved in the vertical direction (running direction of the continuous paper) or the horizontal direction (width direction of the continuous paper) by the plate cylinder fine movement adjusting mechanism. However, in the conventional automatic register adjusting device, the misregistration is gradually corrected by feedback control while finely moving the plate cylinder, so it is great for correcting sudden and large misregistration caused by a paper splicer (paster). Time is required and a large amount of waste paper is generated. In addition, such a sudden misregistration at the time of paper splicing is that the surface of the new web is easier to absorb moisture by drying, and it is easier to stretch by absorbing dampening water than the old web. And, when the part where the old paper roll and the new paper roll are overlapped by the adhesive material (paper joint part) passes through a drag roller or the like provided at the outlet of the most downstream printing unit, a sudden increase in tension occurs, This is thought to be due to the fact that the continuous paper is further extended.

  In recent years, therefore, there has been proposed a register control method for correcting a misregistration of a pattern register and a misregistration of a cutting register that occur suddenly after paper splicing (Patent Document 1). The registration control method disclosed in Patent Document 1 predicts the amount of misregistration of a pattern register and the amount of trimming register that occur due to a splicing from an old web (old reel) to a new web (new reel). Correct the misregistration amount of the pattern register by adjusting the rotational phase of the plate cylinder or the blanket cylinder based on the misregistration amount of the designed pattern register, and adjust the position of the compensator roller based on the predicted misregistration amount of the cutting register In this case, the deviation amount of the cutting register is corrected. According to the register control method of Patent Document 1 described above, by adjusting the rotational phase of the plate cylinder or the blanket cylinder and the position of the compensator roller based on the predicted shift amount of the pattern register and the predicted shift amount of the cutting register. Compared with the automatic registration adjustment by the feedback control of the conventional automatic registration adjustment device, it becomes possible to correct the shift amount quickly, and it is possible to reduce the waste paper.

JP 2006-321213 A

  However, the registration control method disclosed in Patent Document 1 is provided with a compensator roller on the exit side of the printing unit in order to correct the deviation amount of the cutting register, and for expensive compensation for controlling the compensator roller with high accuracy. Since it is necessary to use a drive motor, there is a problem that the equipment cost is high. Further, the registration control method of Patent Document 1 requires that the compensator roller be moved again greatly when returning from the control at the time of paper splicing to the normal control, and a large tension fluctuation occurs at that time. There is a problem that misregistration due to movement of the compensator roller may occur.

  The present invention has been made in view of the above-described problems of the prior art, and its purpose is to be able to instantaneously correct a sudden misregistration that occurs after paper splicing and to divert existing equipment. It is an object of the present invention to provide an offset rotary printing press and a printing control method for the offset rotary press capable of reducing equipment costs.

  An offset rotary printing press according to the present invention includes a printing unit configured to perform overprinting on continuous paper, and a feeder that supplies the continuous paper to the printing unit by sequentially joining a plurality of webs. An offset rotary printing press provided with a paper unit and an outfeed roller mechanism provided on the downstream side of the printing unit and configured to pull the continuous paper discharged from the printing unit, A plurality of printing units each having a printing cylinder and a printing cylinder driving unit that rotationally drives the printing cylinder, and an automatic registration adjustment control unit configured to be able to detect a registration deviation of each printing cylinder with respect to the continuous paper, A plate cylinder fine movement adjusting mechanism configured to be capable of adjusting a registration deviation between the plate cylinders, and the outfeed roller mechanism includes an outfeed roller for pulling the continuous paper, and the printing cylinder driving unit. An outfeed roller driving means for independently rotating the outfeed roller, and changing the relative speed with the surface speed of the plate cylinder by the outfeed roller driving means, thereby adjusting the draw rate of the continuous paper. The paper feeding unit is configured to output a paper splicing signal when splicing from the old web to the new web, and the printing unit is detected by the automatic register adjustment control unit. A feedback control that corrects the misregistration based on the misregistration and a feedforward control that corrects the misregistration based on a predetermined set value can be selectively executed, and based on the splicing signal, It is configured to switch from feedback control to the feedforward control, and the outfeed roller mechanism is Based on the serial paper splicing signal, characterized in that it is configured to lead the paper web at a preset lower pull rates than pulling rate of normal.

  Also, a printing control method for an offset rotary printing press according to the present invention is a printing control method performed using the above-described offset rotary printing press, from the feedback control to the feedforward control based on the splicing signal. A control switching step for switching and a pulling rate changing step for changing the pulling rate of the outfeed roller mechanism to a pulling rate lower than a pulling rate at a normal time are performed.

  According to the present invention, an offset rotary printing press and an offset rotary printing press that can instantaneously correct a sudden misregistration that occurs after paper splicing and that can reduce equipment costs by diverting existing equipment. A printing control method can be provided.

1 is a diagram illustrating a schematic configuration of an offset rotary printing press according to an embodiment. It is a block block diagram which shows roughly the control structure of the offset rotary printing press which concerns on this embodiment. It is a block block diagram which shows roughly the control structure of the printing part which concerns on this embodiment. It is a figure which shows roughly an example of the delay timer setting screen and correction timer setting screen which concern on this embodiment. It is a figure which shows roughly an example of the correction | amendment operation direction setting screen which concerns on this embodiment. It is a block block diagram which shows roughly the control structure of the rail frame part which concerns on this embodiment. It is a block block diagram which shows roughly the control structure of the folding part which concerns on this embodiment. It is a figure which shows roughly an example of the low drawing rate control setting screen which concerns on this embodiment. 5 is a flowchart schematically showing a flow of presetting of a printing unit in register adjustment control at the time of paper splicing according to the present embodiment. It is a flowchart which shows roughly the flow of a preset of the outfeed roller mechanism in the register adjustment control at the time of the paper splicing concerning this embodiment. 6 is a flowchart schematically showing a flow of register adjustment control at the time of paper splicing in a printing unit. It is a flowchart which shows roughly the flow of the registration adjustment control at the time of paper splicing in an outfeed roller mechanism. It is a figure which shows schematic structure of the offset rotary printing press which concerns on other embodiment.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

[Mechanical configuration of web offset press]
First, the mechanical configuration of the rotary offset printing press 1 according to this embodiment will be described with reference to FIG. Note that the rotary offset printing press 1 according to the present embodiment is capable of performing overprinting on a paper feeding unit configured to perform automatic paper splicing and continuous paper, and registering between printing cylinders. Since it is possible to appropriately utilize an existing shaftless rotary printing press that includes a printing unit configured to be able to adjust the deviation and an outfeed roller disposed on the downstream side of the printing unit, the details of each configuration Description is omitted.

  The rotary offset printing press 1 according to the present embodiment includes a plurality of (two in the illustrated example) paper feed units 10a and 10b that hold a plurality of webs R, and a continuous paper W supplied from the paper feed units 10a and 10b. A plurality of (two in the illustrated example) printing units 20a and 20b that print on the sheet, and one or a plurality of continuous sheets W after printing are cut with a predetermined cut-off (cutting length) to obtain individual sheet-like sheet groups A folding section 60 that folds the sheet-like sheet group to create a desired signature, and a plurality of (in the illustrated example, a travel path of the continuous paper W from the printing sections 20a and 20b to the folding section 60. Two rail frame portions 50a and 50b, and a paper discharge mechanism (not shown) for discharging the defective paper by moving it away from the conveyance path. In the illustrated example, a configuration in which two sheet feeding units 10a and 10b, two printing units 20a and 20b, and two rail frame units 50a and 50b are provided is illustrated. Depending on the configuration, the configurations of the paper feeding unit, the printing unit, and the rail frame unit and the number of the units can be arbitrarily set.

  Each paper feed unit 10a (10b) is configured to sequentially feed a plurality of webs R to supply the continuous paper W to the printing unit 20a (20b) without stopping the rotary offset printing press 1. Has been. Specifically, each paper feed unit 10a (10b) includes a holding arm (not shown) that holds a plurality of (three in the illustrated example) webs R in which the continuous paper W is wound up in a roll shape. An infeed device 12a (12b) for feeding the continuous paper W toward the printing unit 4a (4b), and an automatic paper splicing device for automatically splicing the continuous paper (running paper) W and the new web R in the standby state. It has. The automatic paper splicer is attached with a paster roller or a paster brush 15a (15b) for pasting the continuous paper W onto the new web R at a predetermined timing, and a cutter (not shown) for cutting the continuous paper W of the old web. The paster arm 14a (14b) is provided, and the continuous paper W fed from the old web R and the new web R can be automatically spliced without stopping the web offset press 1. It is configured. The paper feeding unit 10a (10b) can continuously feed the continuous paper W to the printing unit 20a (20b) without stopping the rotary offset printing press 1 by sequentially joining a plurality of webs R. In addition, various known configurations can be adopted as long as they can output a paper splicing signal when splicing from the old paper roll R to the new paper roll R, and detailed description thereof will be omitted.

  Each of the printing units 20a (20b) includes a plurality (four in the first embodiment) of printing units (first printing unit 22a to fourth printing unit 22d) arranged side by side in the up-down direction and the fourth downstream side. A plate cylinder fine movement adjusting mechanism 28 (see FIG. 3) provided in three printing units (first to third printing units 22a to 22c) excluding the printing unit 22d, and a continuation of the first to fourth printing units 22a to 22d. An automatic registration adjustment control unit 48 configured to detect registration misregistration with respect to the paper W and a frame of the printing unit 20a (20b) can be set and input various information used for driving control of the printing unit 20a (20b). And a printing unit graphic panel 30. The automatic register adjustment control unit 48 and the printing unit graphic panel 30 will be described in detail in the description of the control configuration described later.

  Each of the first to fourth printing units 22a to 22d includes an ink supply device (not shown), a dampening water supply device (not shown), a plate cylinder (printing cylinder) 23a, and a blanket cylinder (printing cylinder) 23b. A shaftless printing unit is provided with a pair of continuous papers W, and each plate cylinder 23a (or each blanket cylinder 23b) is provided with printing cylinder driving means 24 (see FIG. 3) such as a shaftless motor. The plate cylinder 23a has an axial length (W) corresponding to four pages in the horizontal direction of the newspaper and a length (L) corresponding to one page in the vertical direction of the newspaper. 1 (L) type single cylinder (single cylinder), and blanket cylinder 23b is a so-called 4 (W) x 2 (L) type double cylinder having a circumference twice that of the 1x plate cylinder. is there. The plate cylinder 23a and the blanket cylinder 23b are connected by appropriate means such as gears, and are configured to rotate in synchronization. The plate cylinder 23a of the fourth printing unit 22d at the most downstream side where the plate cylinder fine adjustment mechanism 28 is not provided is a so-called reference printing cylinder that serves as an adjustment reference for the plate cylinders 23a of the first to third printing units 22a to 22c. Function. The ink supply device, the fountain solution supply device, the plate cylinder 23a, and the blanket cylinder 23b can be arbitrarily selected from various known ones, and the description thereof is omitted.

  The first to fourth printing units 22a to 22d have different colors (four colors of cyan, magenta, yellow and black in order from the bottom in this embodiment) with respect to the continuous paper W traveling from the bottom to the top. By performing overprinting, double-sided color printing (double-sided, four-color printing in this embodiment) is performed on the continuous paper W. In addition, the first to fourth printing units 22a to 22d print registration marks (not shown) for the automatic registration adjusting device (not shown) to detect misregistration in the margins of the print image, respectively. It is configured as follows. Note that various known registration marks can be adopted as the registration marks, and thus detailed description thereof is omitted.

  Here, the automatic registration adjusting device uses a front side camera group 26a that reads a registration mark printed on the surface of the continuous paper W and a back side camera group 26b that reads a registration mark printed on the back side of the continuous paper W. Thus, it is an incidental facility of the rotary offset printing press 1 configured to detect a deviation (register deviation) of the printed images overprinted by the first to fourth printing units 22a to 22d. The front side camera group 26a is installed so as to face one outfeed roller 52a through the continuous paper W, and the back side camera group 26b is installed so as to face the other outfeed roller 52b through the continuous paper W. Has been. Since the automatic register adjusting device can adopt various known configurations, detailed description thereof will be omitted. Further, the installation positions of the front-side camera group 26a and the back-side camera group 26b are not particularly limited, and can be arranged at appropriate positions such as a position facing the guide roller.

  Each of the plate cylinder fine adjustment mechanisms 28 includes an appropriate registration adjusting motor (not shown) provided at the shaft end of the plate cylinder 23a, and the plate cylinder 23a is moved in the axial direction by driving the registration adjusting motor. It is possible to make it. Since the plate cylinder fine adjustment mechanism 28 can employ various known configurations, detailed description thereof is omitted.

  The offset rotary printing press 1 according to the present embodiment is configured to be able to correct the misregistration in the vertical direction by adjusting the rotational phase of the plate cylinder 23 a by the printing cylinder driving unit 24, and the plate cylinder fine movement adjusting mechanism 28. By moving the plate cylinder 23a in the axial direction, the misregistration in the left-right direction can be corrected. The plate cylinder fine adjustment mechanism 28 includes both a register adjusting motor and the like that can adjust the axial position of the plate cylinder 23a and a register adjusting motor and the like that can adjust the rotational phase of the plate cylinder 23a. In the case of using the plate cylinder fine movement adjusting mechanism, the plate cylinder fine movement adjusting mechanism 28 may be configured to correct both the vertical misalignment and the horizontal misregistration. As such a plate cylinder fine adjustment mechanism, various known plate cylinder fine adjustment mechanisms can be employed.

  The rail frame part 50a (50b) is located in the upper part (downstream side) of each printing part 20a (20b), and the double-width continuous paper W fed from each printing part 20a (20b) is half the width. The sheet is cut into continuous paper (hereinafter referred to as “half-cut continuous paper”), and is overlapped in the order of pages and guided to the folding unit 60. Specifically, each rail frame 50a (50b) is an outfeed roller that pulls the double-width continuous paper W discharged from the printing unit 20a (20b) into the rail frame 50a (50b). The mechanism 51, a slitter knife 54 that cuts the continuous paper W in the width direction along the running direction of the continuous paper W, and uses the double-width continuous paper W as semi-continuous paper, and the semi-continuous paper as necessary A turn bar device 55 that moves from the operating side (OS) to the driving side (DS) or from the driving side (DS) to the operating side (OS), and a rail frame control unit 58 that is provided for each half-cut continuous paper and is described later. An adjustment roller 56 configured to adjust the cutting position of the half-cut continuous paper in the folding portion 60 by changing the path length to the half-cut continuous paper folding portion 60 based on the path length adjustment control. To have. In addition, since the rail frame part 50a (50b) can employ | adopt various well-known structures if it is provided with the outfeed roller mechanism 51, the detailed description is abbreviate | omitted.

  The outfeed roller mechanism 51 is provided at the outlet of the fourth printing unit 22d on the most downstream side, and a pair of outfeed rollers 52a and 52b that pulls the continuous paper W at a predetermined drawing rate, and a pair of outfeed rollers 52a and 52b. And an outfeed roller driving means 53 (see FIG. 6). The pair of outfeed rollers 52a and 52b is disposed at a position where the continuous paper W travels stably on the downstream side of the outlet of the most downstream fourth printing unit 22d, and is connected to the outfeed roller driving unit 53. The rotation driving force of the outfeed roller 52a is transmitted to the other outfeed roller 52b via a pulley belt or the like, so that the outfeed roller 52a rotates in synchronization. The outfeed roller driving means 53 is composed of a drive motor or the like that rotationally drives the outfeed rollers 52a and 52b independently of the printing cylinder driving means 24. The surface speed (circumferential speed) of the outfeed rollers 52a and 52b is determined by the plate cylinder. The drawing speed of the continuous paper W can be adjusted (draw control is possible) by accelerating / decelerating the surface speed (circumferential speed) of 23a. Here, the pull rate is a value indicating whether the surface speed of the outfeed rollers 52a and 52b is increased or decreased with reference to the surface speed of the plate cylinder 23a. For example, the pull rate of the outfeed rollers 52a and 52b is In the case of 2.00%, it means that the outfeed rollers 52a and 52b are controlled to have a surface speed of 102% of the surface speed of the plate cylinder 23a.

  The folding unit 60 includes a folding drag roller 61 that superimposes a plurality of half-cut continuous papers fed from the rail frame units 50 a and 50 b and feeds them to the downstream former unit, and a half-cut continuous paper superimposed by the folding drag rollers 61. The former plate 62 is vertically folded at the center in the width direction of the half-cut continuous paper along the running direction, and the individual sheets are cut by cutting the vertically folded half-cut continuous paper in the width direction (direction perpendicular to the running direction). A saw cylinder (not shown) for creating a sheet group, a folding cylinder (not shown) for creating a signature by horizontally folding the cut sheet group along the width direction, and discharging from the discharge port 67 A transport mechanism (not shown) for transporting the signature to the downstream side and a frame of the folding part 60, and various information used for driving control of the folding part 60 and the rail frame parts 50a and 50b can be set and inputted. Folding machine And a La Fick panel 65. In addition, since the folding part 60 can employ | adopt various well-known structures, the detailed description is abbreviate | omitted. In the illustrated example, the folding drag roller 61 and the former 62 are arranged in two stages in the vertical direction. However, the present invention is not limited to this, and the number of folding drag rollers 61 and the former plates 62 can be set arbitrarily. For example, only the lower stage may be installed. The folding machine graphic panel 65 will be described in detail in the description of the control configuration described later.

[Control configuration of offset rotary printing press]
Next, a control configuration of the offset rotary printing press 1 according to the present embodiment will be described with reference to FIGS. As shown in FIG. 2, the offset rotary printing press 1 according to the present embodiment includes a master control unit (main master board) 2 that supervises overall control of the offset rotary press 1.

  As shown in FIG. 2, the master control unit 2 uses the appropriate rotary press dedicated network NW to control the sheet feed control units 16 of the sheet feed units 10 a and 10 b to be described later and the print controls of the printing units 20 a and 20 b to be described later. Sections 46, 46, printing drive control sections 47, 47 and automatic registration adjustment control sections 48, 48, rail frame control sections 58 and rail frame drive control sections 59, which will be described later, of the rail frame sections 50a, 50b, and folding sections. 60 is connected to a folding machine control unit 63 and a folding machine drive control unit 66, which will be described later.

  Each of the paper feeding units 10a and 10b controls a paper splicing operation, and at the time of paper splicing, a paper control unit 46 of the printing unit 20a (20b), which will be described later, and a folding machine control unit 63 of the folding unit 60, respectively. A paper feed control unit 16 configured to output a splicing signal is provided.

  As shown in FIG. 3, the printing units 20 a and 20 b respectively perform printing control that comprehensively controls each component of the printing units 20 a and 20 b based on various setting information input via the printing unit graphic panel 30. Of the registration marks read by the printing unit (printing machine control panel) 46, the printing drive control unit (printing machine motor board) 47 for executing the driving control of the printing driving means 24, and the front side camera group 26a and the rear side camera group 26b. An automatic registration adjustment control unit (automatic registration control panel) 48 that processes position information to determine a registration error is provided, and a storage unit (not shown) that stores various types of information. The print control unit 46, the print drive control unit 47, and the automatic registration adjustment control unit 48 are communicably connected by a rotary press dedicated network NW. In addition, the broken line in FIG. 3 means connecting via the rotary press exclusive network NW.

  The printing control unit 46 corrects the registration deviation based on the feedback control for correcting the registration deviation based on the registration adjustment signal from the automatic registration adjustment control unit 48 and the setting value input via the printing unit graphic panel 30. The feedforward control can be selectively executed.

  Specifically, the print control unit 46 is configured to execute feedback control based on a registration adjustment signal from the automatic registration adjustment control unit 48 in a normal time when paper splicing is not performed. Note that the feedback control based on the registration adjustment signal from the automatic registration adjustment control unit 48 can be executed based on the same control method and program as various known feedback controls, and thus detailed description thereof is omitted.

  The print control unit 46 is configured to temporarily stop the feedback control based on the paper splicing signal from the paper feed control unit 16 of the paper feed unit 10a (10b) and switch from the feedback control to the feedforward control. ing. This feedforward control is based on the delay timer value, the correction timer value, and the correction operation direction set for each plate cylinder 23a via the printing unit graphic panel 30, and the plates of the first to third printing units 22a to 22c. The cylinder fine movement adjusting mechanism 28 and the printing cylinder driving means 24 of the first to third printing units 22a to 22c force the plate cylinders 23a of the first to third printing units 22a to 22c in the vertical direction or the horizontal direction. It is executed by moving to.

  In the present embodiment, the delay timer refers to the time from when the paper splicing signal is output from the paper feed control unit 16 of the paper feed unit 10a (10b) until switching to feedforward control. The delay timer can be set as appropriate. For example, after the paper splicing signal is output, the splicing portion of the continuous paper W (the portion where the old paper roll and the new paper roll are overlapped by the adhesive material) is provided. It can be set as the time until it passes through each plate cylinder 23a. The correction timer value refers to the movement time of each plate cylinder 23a by the plate cylinder fine adjustment mechanism 28 and the printing cylinder driving means 24. In the present embodiment, the correction timer value and the duration of the feedforward control (that is, the time from when the feedback control is temporarily stopped to when the feedback control is restarted) will be described as being the same. The timer value and the duration of the feedforward control may be set to different values. Further, instead of the correction timer value, the correction amount (movement amount) of each plate cylinder 23a by the plate cylinder fine adjustment mechanism 28 and the printing cylinder driving means 24 may be set. These delay timer value, correction timer value, and correction continuation timer value can be appropriately set based on a calculated value or an actual measurement value. The correction operation direction refers to the direction in which each plate cylinder 23a is operated, and either the top direction or the ground direction can be selected, and either the left direction or the right direction can be selected.

  The print drive control unit 47 drives and controls each print drive unit 24 so that each plate cylinder 23a is driven to rotate at a predetermined printing speed, and print control is performed at the time of paper splicing. Based on the control signal from the unit 46, the print driving means 24 is driven and controlled so that the rotational phase of each plate cylinder 23a of the first to third printing units 22a to 22c is adjusted to the top direction or the ground direction. Yes.

  The automatic registration adjustment control unit 48 is electrically connected to the front-side camera group 26a and the back-side camera group 26b, and image data relating to the registration marks of the respective colors from the front-side camera group 26a and the back-side camera group 26b in real time. It is configured to be obtainable. The automatic registration adjustment control unit 48 performs image processing on the image data acquired from the front-side camera group 26a and the back-side camera group 26b to identify the inter-mark distance of each registration mark, and the specified inter-mark distance is stored in advance. The occurrence of misregistration is detected by determining whether or not the set value is greater than or equal to the setting value stored in the printing unit, the printing unit in which misregistration occurs, the direction of misregistration, and the amount of misregistration (registration The distance between the marks) is specified. Further, the automatic registration adjustment control unit 48 is configured to output a registration adjustment signal to the print control unit 46 when a registration deviation is detected. Note that, in the automatic registration adjustment control unit 48 according to the present embodiment, the determination process for determining whether or not there is a misregistration can be executed based on the same methods and programs as various known determination processes. Detailed description thereof is omitted.

  The storage unit includes information on a delay timer value, a correction timer value, and a correction operation direction set for each plate cylinder 23a via the printing unit graphic panel 30, and various programs for executing feedback control and feedforward control, In addition, various information, programs, and the like necessary for executing the printing process are stored.

  The printing unit graphic panel 30 is a so-called touch panel, and as shown in FIGS. 4 and 5, a delay timer setting screen (see FIG. 4) for setting a delay timer value and a correction for setting a correction timer value. Various setting screens including a timer setting screen (see FIG. 4) and a correction operation direction setting screen (see FIG. 5) for setting the correction operation direction can be displayed.

  The delay timer setting screen is configured so that the delay timer setting screen when correcting in the vertical direction and the delay timer setting screen when correcting in the left-right direction are individually displayed and can be set to different delay timer values. . Similarly to the delay timer setting screen, the correction timer setting screen displays a correction timer setting screen for correction in the vertical direction and a correction timer setting screen for correction in the left-right direction. The timer value can be set. These top and bottom direction delay timer setting screen, left and right direction delay timer setting screen, top and bottom direction correction timer setting screen and left and right direction correction timer setting screen can be various setting input screens. It is possible to adopt a setting input screen as shown in FIG.

  The setting input screen shown in FIG. 4 includes first to sixth plate cylinder selection buttons 31a to 31f for selecting a plate cylinder for setting a delay timer value or a correction timer value, and setting processing (setting for the selected plate cylinder) A change button 33 for starting a value change process), a set value display area 34 and an increase / decrease button 35 for inputting a set value, a registration button 36 for registering the input set value, and a setting process And a cancel button 37 for canceling.

  The first plate cylinder selection button 31a is a button for selecting the plate cylinder 23a disposed on the front side of the continuous paper W of the third printing unit 22c, and the second plate cylinder selection button 31b is the third printing unit 22c. This is a button for selecting the plate cylinder 23a arranged on the back side of the continuous paper W, and the third plate cylinder selection button 31c selects the plate cylinder 23a arranged on the front side of the continuous paper W of the second printing unit 22b. The fourth plate cylinder selection button 31d is a button for selecting the plate cylinder 23a disposed on the back side of the continuous paper W of the second printing unit 22b, and is a fifth plate cylinder selection button. 31e is a button for selecting the plate cylinder 23a arranged on the front side of the continuous paper W of the first printing unit 22a, and the sixth plate cylinder selection button 31f is the back side of the continuous paper W of the first printing unit 22a. Placed in It is a button for selecting the plate cylinder 23a. These first to sixth selection buttons 31a to 31f are arranged so as to be aligned with the actual stacking order of the first to third printing units and the position of the plate cylinder with respect to the continuous paper W. It is preferable from the viewpoint of prevention. Near the first to sixth selection buttons 31a to 31f, current setting location display areas 32a to 32f for displaying the current setting values of the plate cylinders are provided.

  In order to set the delay timer value or the correction timer value using the setting input screen shown in FIG. 4, first, by pressing any one of the first to sixth plate cylinder selection buttons 31a to 31f, the setting target Is selected, and setting processing for the selected plate cylinder is started by pressing the change button 33. Next, the increase / decrease button 35 is operated so that the numerical value displayed in the setting value display area 34 becomes a desired setting value, and the registration button 36 is pressed while the desired setting value is displayed in the setting value display area 34. At the same time, the change button 33 is pressed. As a result, a desired delay timer value or correction timer value is registered for the selected plate cylinder.

  On the correction operation direction setting screen, a top / bottom direction setting screen for selecting a top direction or a ground direction and a left / right direction setting screen for selecting a left direction or a right direction are individually displayed, and each of the operation directions can be selected. It is configured as follows. These top-and-bottom direction setting screen and left-right direction setting screen can be various setting input screens. For example, a setting input screen as shown in FIG. 5 can be adopted. In the left / right direction setting screen, the direction selection buttons 42a to 42f of the top / bottom direction setting screen shown in FIG. 5 are changed from the “top” selection button to the “left” selection button and the “ground” selection button to the “right” selection button. Since these are only changes, the description thereof is omitted.

  As shown in FIG. 5, the top / bottom direction setting screen includes first to sixth plate cylinder selection buttons 41a to 41f for selecting a plate cylinder for setting a correction operation direction, and a direction selection button for selecting a setting direction. 42a to 42f, a change button 43 for starting a setting process (setting direction changing process) for a selected plate cylinder, and a cancel button 44 for canceling the setting process are provided.

  The first plate cylinder selection button 41a is a button for selecting the plate cylinder 23a disposed on the front side of the continuous paper W of the third printing unit 22c, and the second plate cylinder selection button 41b is the third printing unit 22c. This is a button for selecting the plate cylinder 23a arranged on the back side of the continuous paper W, and the third plate cylinder selection button 41c selects the plate cylinder 23a arranged on the front side of the continuous paper W of the second printing unit 22b. The fourth plate cylinder selection button 41d is a button for selecting the plate cylinder 23a disposed on the back side of the continuous paper W of the second printing unit 22b, and is a fifth plate cylinder selection button. 41e is a button for selecting the plate cylinder 23a arranged on the front side of the continuous paper W of the first printing unit 22a, and the sixth plate cylinder selection button 41f is the back side of the continuous paper W of the first printing unit 22a. Placed in It is a button for selecting the plate cylinder 23a. These first to sixth selection buttons 41a to 41f are arranged so as to be aligned with the actual stacking order of the first to third printing units and the position of the plate cylinder with respect to the continuous paper W. It is preferable from the viewpoint of prevention. In the vicinity of the first to sixth selection buttons 41a to 41f, there are direction selection buttons 42a to 42f including a “heaven” selection button for selecting the sky direction and a “ground” selection button for selecting the ground direction. Is provided.

  In order to set the correction operation direction using the top / bottom direction setting screen shown in FIG. 5, first, the setting process is started by pressing the change button 33, and then the first to sixth plate cylinder selection buttons 41a to 41f are used. A plate cylinder to be set is selected by pressing any one of them. Next, either the “heaven” selection button or the “ground” selection button is pressed, and the change button 33 is pressed. Thereby, the adjustment direction of the rotation phase at the time of feedforward control of the selected plate cylinder is set. On the top / bottom direction setting screen, the direction selection buttons 42a to 42f are set to the non-selected state so that the plate cylinder can be set not to operate in either the top direction or the ground direction (unused setting). is there.

  As shown in FIG. 6, the rail frame units 50a and 50b are rail frame control units (rails) that comprehensively control each component of the rail frame units 50a and 50b by various predetermined setting information or appropriate feedback control. Frame frame) 58, a rail frame drive control unit (rail frame motor board) 59 for controlling driving means of each component of the rail frame units 50a and 50b based on various control signals from the rail frame control unit 58, and various types And a storage unit (not shown) for storing information. The rail frame control unit 58 and the rail frame drive control unit 59 are communicably connected by a rotary press dedicated network NW. In addition, the broken line in FIG. 6 means that it connects via the rotary press exclusive network NW. Since the control related to the components other than the outfeed roller mechanism 51 is the same as various known controls, the description thereof is omitted.

  The rail frame drive control unit 59 pulls the continuous paper W at a normal pull rate preset by the outfeed roller mechanism 51 based on a pull rate switching signal from the folding machine control unit 63 of the folding unit 60. It is configured to be able to selectively execute normal draw rate control (normal draw control) and low draw rate control (low draw control) that pulls the continuous paper W at a draw rate lower than the normal draw rate. .

  Specifically, the rail frame drive control unit 59 is configured to temporarily reduce the pull rate by the outfeed roller mechanism 51 when a pull rate switching signal is received from the folding machine control unit 63 of the folding unit 60. ing. Further, when the rail frame drive control unit 59 receives the pull rate return signal from the folding machine control unit 63 of the folding unit 60, the rail frame drive control unit 59 gradually sets the pull rate by the outfeed roller mechanism 51 (for example, 0. 3 every 3 seconds). It is configured to return to the normal pull rate. Such low pulling rate control is performed by a normal pulling rate (drawing rate setting value) and pulling rate subtraction set for each outfeed roller mechanism 51 (each printing unit 20a, 20b) via the folding machine graphic panel 65. This is executed based on the amount (draw subtraction amount), the number of control starting parts, and the number of holding parts in control.

  In this embodiment, the pull rate subtraction amount refers to the amount of the pull rate that is subtracted from the normal pull rate that is preset during the low pull rate control. The number of control start copies means the number of copies that pass through the upstream outfeed roller 52a from when the paper splicing signal is output from the paper feed control unit 16 of the paper feed unit 10a (10b) until switching to the low drawing rate control. The number of control start copies can be set as appropriate so that the switching timing of the low drawing rate control becomes the rise timing of the print exit tension. For example, the splicing portion of the continuous paper W after the splicing signal is output. The number of copies that pass through the upstream outfeed roller 52a before the upstream paper feed roller 52a reaches the upstream side (the portion where the old paper roll and the new paper roll are overlapped by the adhesive), that is, the paper feed unit 10a (10b) ) To the upstream outfeed roller 52a. The number of holding units during control refers to the number of copies for which the low drawing rate control is continued, and is set appropriately so that the splicing portion of the continuous paper W passes through the folding portion 60 and returns to the normal drawing rate at a stable timing. Is possible. Instead of setting by the number of copies such as the number of control start copies and the number of holding units during control, the start timing and duration may be set by time. The number of control start units and the number of holding units during control can be set as appropriate based on calculated values or actually measured values.

  The storage unit stores various information, programs, and the like that are necessary for executing the transport process of the continuous paper W.

  As shown in FIG. 7, the folding unit 60 comprehensively controls each component of the folding unit 60 based on various setting information input via the folding machine graphic panel 65 and the folding machine operation panel 64. A control unit (folding machine control panel) 63, a folding machine drive control unit (folding machine motor board) 66 for controlling the driving means of each component of the folding unit 60 based on various control signals from the folding machine control unit 63, and And a storage unit (not shown) for storing various information. The folding machine control unit 63 and the folding machine drive control unit 66 are communicably connected by a rotary press dedicated network NW. In addition, the broken line in FIG. 7 means that it connects via the rotary press exclusive network NW. Since the control regarding each component of the folding part 60 is the same as various well-known controls, the description thereof is omitted.

  The folding machine control unit 63 outputs the paper splicing signal based on the paper splicing signal from the paper feed control unit 16 received via the rotary press dedicated network NW, and the paper feeding unit 10a (10b) of the paper feeding control unit 16 outputs the paper splicing signal. The rail frame drive control unit 59 corresponding to is configured to output a pull rate switching signal for switching to a pull rate lower than the normal pull rate via the rotary press dedicated network NW. In addition, the folding machine control unit 63 outputs a pull rate switching signal, and after a lapse of a predetermined period (after passing a predetermined number of copies), to the rail frame drive control unit 59 that has output the pull rate switching signal, A pull rate return signal for returning to the normal pull rate is output. The folding machine control unit 63 is connected to the counter (encoder) of the folding unit 60, and based on the number of rotations of the saw cylinder or folding cylinder counted by the counter, the number of parts that have passed through the upstream outfeed roller 52a is calculated. It is configured to allow counting.

  The folding machine graphic panel 65 is a so-called touch panel, and in addition to various setting input screens necessary for controlling each component of the folding unit 60, as shown in FIG. A low pulling rate control setting screen for inputting information related to control can be displayed.

  As shown in FIG. 8, the low draw rate control setting screen 70 is a current draw rate setting value input unit 72 for inputting a draw rate (draw rate set value) at a normal time and the current draw rate is displayed. A value display area 74, an execution selection button 76 for selecting whether or not to execute the low pulling rate control, a pulling rate subtraction amount input unit 78 for inputting a pulling rate subtraction amount (draw subtraction amount), and the number of control start units The control start number input unit 80 for inputting the number, the holding unit number input unit 82 for inputting the number of holding units under control, and the change button 84 for starting the setting process (setting value changing process) It is provided for each feed roller mechanism 51 (for each printing unit 20a, 20b).

  Each of the pull rate setting value input unit 72, the pull rate subtraction amount input unit 78, the control start number input unit 80, and the holding unit number input unit 82 displays a numeric keypad when pressed, and a desired numerical value is input by the numeric keypad. It is configured to be able to. The pull rate setting value input unit 72, the pull rate subtraction amount input unit 78, the control start unit number input unit 80, and the holding unit number input unit 82 are configured to accept only numerical values within a preset input allowable range. Also good.

  In order to set the low pulling rate control using the low pulling rate control setting screen 70, first, the change button 84 on the outfeed roller mechanism 51 side (the printing unit 20a or the printing unit 20b) to be set is pressed. Thus, the setting process for the outfeed roller mechanism 51 on the side where the change button 84 is pressed is started. Next, the pull rate set value input unit 72 is set to the normal pull rate, the pull rate subtraction amount input unit 78 is set to the subtraction amount of the pull rate, the control start unit number input unit 80 is set to the control start number, and the holding unit number input unit 82 The number of in-control holding units is input respectively. Thereby, the setting of the low pulling rate control regarding the outfeed roller mechanism 51 on the side where the change button 84 is pressed is registered. Further, when the execution selection button 76 is pressed to enter the use state (execution state), switching to the low drawing rate control is executed at the time of paper splicing.

  The storage unit has a normal draw rate (draw rate set value), a draw rate subtraction amount, and a control start copy number set for each outfeed roller mechanism 51 (for each printing unit 20a, 20b) via the folding machine graphic panel 65. In addition, information related to the number of copies held during control, various programs for changing the pull rate, and various information and programs necessary for executing the signature creation process are stored.

[Registration adjustment control during paper splicing]
Next, registration adjustment control (printing control) at the time of paper splicing in the offset rotary printing press 1 according to the present embodiment will be described with reference to FIGS.

  First, pre-setting for executing registration adjustment control at the time of paper splicing will be described. In register adjustment control at the time of paper splicing according to the present embodiment, presetting of the printing units 20a and 20b shown in FIG. 9 and presetting of the outfeed roller mechanism 51 shown in FIG. 10 are performed. The presetting of the printing units 20a and 20b is performed via the printing unit graphic panel 30 provided in each of the two printing units 20a and 20b, and the presetting of the outfeed roller mechanism 51 is performed by folding the folding unit 60. This is done via the machine graphic panel 65.

  In advance setting of the printing unit 20a (20b), as shown in FIG. 9, first, a correction value setting menu at the time of sheet joining is selected from an arbitrary main screen displayed on the display screen of the printing unit graphic panel 30 (S1). ). As a result, the delay timer setting screen for correcting in the vertical direction and the delay timer setting screen for correcting in the horizontal direction are sequentially displayed on the display screen of the printing unit graphic panel 30. A delay timer value is set for each plate cylinder 23a via the screen (S2). When registration of the delay timer value on the delay timer setting screen is completed, a correction timer setting screen for correcting in the vertical direction on the display screen of the printing unit graphic panel 30 and a correction timer setting screen for correcting in the horizontal direction are displayed. Since the images are sequentially displayed, the correction timer value at the time of paper splicing is set for each plate cylinder 23a via these correction timer setting screens (S3). When the registration of the correction timer value on the correction timer setting screen is completed, the top / bottom direction setting screen for selecting the top / bottom direction on the display screen of the printing unit graphic panel 30 and the left / right direction are selected. Since the left and right direction setting screen is sequentially displayed, the correction operation direction at the time of paper splicing is set for each plate cylinder 23a via the top and bottom direction setting screen and the left and right direction setting screen (S4). When selection of the correction operation direction on the top / bottom direction setting screen and the left / right direction setting screen is completed, it is determined whether or not there is a setting omission (S5). You are prompted to choose. On the other hand, when all the inputs and selections are completed and there is no setting omission, the setting information is stored in the storage unit, and the advance setting of the printing unit 20a (20b) ends.

  In advance setting of the outfeed roller mechanism 51, as shown in FIG. 10, first, a correction value setting menu at the time of sheet joining is selected from an arbitrary main screen displayed on the display screen of the folding machine graphic panel 65 (S1 ′). ). Thereby, the low pulling rate control setting screen is displayed on the display screen of the folding machine graphic panel 65. Since various input units are provided for each outfeed roller mechanism 51 (for each printing unit 20a, 20b) on the low pulling rate control setting screen, each outfeed roller mechanism 51 (for each printing unit 20a, 20b). Then, input of the control start number (S2 '), input of the subtraction amount (S3') and input of the number of holding units during control (S4 ') are performed, and each numerical value is set. When the setting of each numerical value is completed, it is determined whether there is a setting omission (S5 '). If there is a setting omission, an error display or the like is made, and the input or selection of the missing portion is prompted. On the other hand, when all the inputs and selections are completed and there is no setting omission, the setting information is stored in the storage unit, and the pre-setting of the outfeed roller mechanism 51 ends.

  Next, the registration adjustment control at the time of paper splicing will be described. In the registration adjustment control at the time of paper splicing according to the present embodiment, the registration adjustment control in the printing units 20a and 20b shown in FIG. 11 and the drawing rate change control in the outfeed roller mechanism 51 shown in FIG. 12 are performed in parallel. . In addition, the pull rate change control in the outfeed roller mechanism 51 of the one printing unit 20a and the one rail frame unit 50a, and the pull rate change control in the outfeed roller mechanism 51 of the other print unit 20b and the other rail frame unit 50b. Are executed independently of each other.

  In the registration adjustment control in the printing unit 20a (20b), as shown in FIG. 11, the first feedback control is performed by normal feedback control based on the registration adjustment signal from the automatic registration adjustment control unit 48 until the splicing operation is started. The registration deviation of each plate cylinder 23a of the third printing units 22a to 22c is automatically adjusted (S10). Since such normal feedback control is known, the description thereof is omitted.

  Then, as the old paper roll R feeding the continuous paper W decreases, a paper splicing operation from the old paper roll R to the new paper roll R is started in the paper feed section 10a (10b) (S11). A paper splicing signal is output from the paper feed control unit 16 (10b) (S12). The splicing signal output from the paper feed control unit 16 is input in real time to the print control unit 46 of the printing unit 20a (20b) via the rotary press dedicated network NW.

  When the paper splicing signal is input, the print control unit 46 of the printing unit 20a (20b) counts the time from when the paper splicing signal is input (S13). It is determined in real time for each plate cylinder 23a whether or not the delay timer value set in advance is reached (S14). Further, when it is determined that the counted time has reached the delay timer value, the print control unit 46 temporarily stops the feedback control for the plate cylinder 23a that has reached the delay timer value (S15), and is set in advance. The process proceeds to feed forward control based on the predicted value of misregistration (S16). Thereby, the feedback control is performed at the timing when the splicing portion of the continuous paper W (the portion where the old winding paper and the new winding paper are overlapped with each other by the adhesive material) passes through each plate cylinder 23a and a sudden and large misregistration occurs. To feedforward control.

  When feedforward control is started, adjustment of the vertical direction position (rotation phase) of the plate cylinder 23a by the printing cylinder driving means 24 toward the correction operation direction set in advance via the printing unit graphic panel 30; The adjustment of the horizontal position of the plate cylinder 23a by the plate cylinder fine adjustment mechanism 28 is started, and the time from the start of these adjustments is counted (S17). Then, it is determined in real time whether or not the counted time has reached a correction timer value set in advance via the printing unit graphic panel 30 (S18), and the counted time has reached the correction timer value. When the determination is made, the adjustment of the vertical position (rotation phase) of the plate cylinder 23a by the printing cylinder driving means 24 and the adjustment of the horizontal position of the plate cylinder 23a by the plate cylinder fine adjustment mechanism 28 are stopped, and feedforward control is performed. Is terminated (S19). Simultaneously with the end of the feedforward control, normal feedback control is returned (resumed) (S20). Thereby, the paper splicing operation is completed (S21).

  Next, the pull rate change control in the outfeed roller mechanism 51 will be described with reference to FIG. In the pulling rate change control in the outfeed roller mechanism 51, normal pulling rate control for pulling the continuous paper W at a predetermined normal pulling rate is executed until the paper splicing operation is started (S10 ′). ).

  Then, as the old paper roll R feeding the continuous paper W decreases, a paper splicing operation from the old paper roll R to the new paper roll R is started in the paper feed section 10a (10b) (S11 ′). A sheet splicing signal is output from the sheet feeding control unit 16 of 10a (10b) (S12 '). The splicing signal output from the paper feed control unit 16 is input in real time to the rail frame control unit 58 of the rail frame unit 50a (50b) via the rotary press dedicated network NW.

  When the paper splicing signal is input, the rail frame control unit 58 of the rail frame unit 50a (50b) counts the number of copies that have passed through the upstream outfeed roller 52a after the paper splicing signal is input (S13 '). Then, it is determined in real time whether the counted number of copies has reached the control start number set in advance through the folding machine graphic panel 65 (S14 ′). Further, when the rail frame control unit 58 determines that the counted number of copies has reached the control start number, it starts the low pulling rate control (S15 '). Specifically, the rail frame control unit 58 subtracts the pull rate of the outfeed roller mechanism 51 from the normal pull rate by subtracting the pull rate subtraction amount set in advance via the folding machine graphic panel 65. Switch to. As a result, the splicing portion of the continuous paper W passes through the outfeed roller mechanism 51, and at a timing when sudden and large tension is applied to the continuous paper W in the printing unit 20a (20b), the pulling rate at the normal time is Can be switched to a lower pull rate.

  When the low pulling rate control is started, the number of copies that have passed through the upstream outfeed roller 52a since the start of the low pulling rate control is counted (S16 '), and the counted number of copies is passed through the folding machine graphic panel 65. Then, it is determined in real time whether or not the number of holding units under control set in advance is reached (S17 ′). Further, when the rail frame control unit 58 determines that the counted number of copies has reached the number of holding units being controlled, the rail frame control unit 58 ends the low pulling rate control and returns the pulling rate of the outfeed roller mechanism 51 to the normal pulling rate. (S18 '). Thereby, the paper splicing operation is completed (S19 ′).

  As described above, in the print control method according to the present embodiment, a predicted misregistration amount that suddenly occurs during paper splicing is set in advance, and feedback control is temporarily stopped during paper splicing. Thus, feedforward control is performed in which each plate cylinder 23a is forcibly moved in the vertical direction and the horizontal direction by the predicted deviation amount (predetermined set value), and normal feedback control is restored after the forced movement. Accordingly, it is possible to drastically shorten the registration time adjustment as compared with the case where the registration error is gradually corrected only by feedback control. Further, in the printing control method according to the present embodiment, in addition to the forced movement of each plate cylinder 23a by the feedforward control, the low pulling rate for switching the pulling rate of the outfeed roller mechanism 51 to a pulling rate lower than the normal pulling rate. After that, the splicing portion of the continuous paper W passes through the folding portion 60 and returns to the normal drawing rate at a stable timing. Thereby, it is possible to cancel or reduce a sudden increase in tension that occurs when the splicing portion of the continuous paper W passes through the rail frame portions 50a and 50b and the folding portion 60 by lowering the pull rate of the outfeed roller mechanism 51. It becomes. In addition, the adjustment time for misregistration can be drastically shortened, and the occurrence of lost paper can be greatly suppressed by offsetting or reducing sudden tension fluctuations caused by the splicing portion of the continuous paper W. Therefore, running costs can be reduced, paper resources can be effectively used, and production efficiency can be improved.

  As described above, the rotary offset printing press 1 according to this embodiment includes the printing units 20a and 20b configured to perform overprinting on the continuous paper W, and the printing unit by sequentially splicing the plurality of webs R. The paper supply units 10a and 10b for supplying the continuous paper W to the 20a and 20b and the downstream of the printing units 20a and 20b are configured to pull the continuous paper W discharged from the printing units 20a and 20b. In the rotary offset printing press 1 provided with the out-feed roller mechanisms 51 and 51, the printing units 20a and 20b each include a plurality of printing cylinder driving units 24 each having a printing cylinder 23a and a printing cylinder driving unit 24 that rotationally drives the printing cylinder 23a. The registration deviation between the printing units 22a to 22d, the automatic registration adjustment controller 48 configured to detect the registration deviation of each plate cylinder 23a with respect to the continuous paper W, and each printing cylinder 23a is adjusted. A plate cylinder fine adjustment mechanism 28 configured to be capable of being provided, and the outfeed roller mechanisms 51 and 51 include outfeed rollers 52 a and 52 b that pull the continuous paper W, and an outfeed roller independent of the printing cylinder driving unit 24. And an outfeed roller driving unit 53 that rotationally drives the sheets 52a and 52b. By changing the relative speed with the surface speed of the plate cylinder 23a by the outfeed roller driving unit 53, the draw rate of the continuous paper W can be adjusted. The paper feeding units 10a and 10b are configured to output a paper splicing signal when splicing from the old web R to the new web R. The printing units 20a and 20b are automatic register adjustment control units 48. Feedback control that corrects the misregistration based on the detected misregistration, and the misregistration based on a preset value The feedforward control to be corrected is configured to be selectively executed, and is configured to switch from feedback control to feedforward control based on the paper splicing signal. The outfeed roller mechanism 51 is preliminarily configured based on the paper splicing signal. The continuous paper W is pulled at a drawing rate lower than the normal drawing rate set.

  According to the offset rotary printing press 1 configured as described above, since the printing control method according to the present embodiment described above can be executed, as described above, the adjustment time for misregistration is drastically reduced. This makes it possible to cancel or reduce sudden tension fluctuations caused by the spliced portion of the continuous paper W, thereby greatly reducing the occurrence of waste paper, reducing running costs, and reducing paper resources. It is possible to improve the effective utilization and production efficiency. In addition, the rotary offset printing press 1 according to the present embodiment can perform overprinting on a paper feeding unit configured to perform automatic paper splicing and continuous paper, and register between printing cylinders. It is possible to divert existing shaftless rotary printing presses equipped with a printing section that can be adjusted for misalignment and an outfeed roller arranged downstream of the printing section. It becomes possible to suppress.

  The preferred embodiment of the present invention has been described above, but the technical scope of the present invention is not limited to the scope described in the above-described embodiment. Various modifications or improvements can be added to the above embodiments.

  For example, in the above description of the embodiment, the plate cylinder 23a has been described as a so-called 4 (W) × 1 (L) type single cylinder (single cylinder), but as shown in FIG. An offset rotary printing press 1 ′ using a so-called 4 (W) × 2 (L) type double plate cylinder 23a ′ may be used as the cylinder 23a. Further, in the case where a divided plate cylinder (so-called shell plate cylinder) divided in the width direction is used as such a double plate cylinder 23a ', moving means such as a register adjusting motor is provided for each of the divided plate cylinders. It is preferable that the provided and divided plate cylinders be movable in the circumferential direction (top and bottom direction) and the axial direction (left and right direction) independently of the other divided plate cylinders. According to such a configuration, it is possible to execute automatic registration adjustment for each divided plate cylinder. In this case, the above-mentioned “pre-setting for executing registration adjustment control at the time of paper splicing” is performed for each divided plate cylinder, and the above-mentioned “register at the time of paper splicing” is performed for each divided plate cylinder. "Adjustment control" is executed.

  In the above-described embodiment, the delay timer setting screen, the correction timer setting screen, and the correction operation direction setting screen are displayed on the printing unit graphic panel 30, and the low drawing rate control setting screen 70 is displayed on the folding machine graphic panel 65. Although described as a thing, it is not limited to this, It is good also as displaying only in any one of the printing part graphic panel 30 and the folding machine graphic panel 65, and other screens, such as a main | middle graphic panel (not shown). It is good also as what is displayed on.

  Further, in the above-described embodiment, the printing control unit 46 of the printing units 20a and 20b executes switching control between feedback control and feedforward control, and the pulling rate change control of the outfeed roller mechanism 51 is performed by the folding unit 60. Although described as what the control part 63 performs, it is not limited to this, The printing control part 46 or the folding machine control part 63 performs both these switching control and pulling rate change control via the network NW only for a rotary press. It is good also as a structure, and it is good also as a structure which control parts other than the printing control part 46 and the folding machine control part 63 perform via the rotary press exclusive network NW.

  Furthermore, in the above-described embodiment, the first printing unit 22a that performs cyan printing is arranged on the first stage (the most upstream side), the second printing unit 22b that performs magenta printing in the following order, yellow printing The third printing unit 22c that performs printing and the fourth printing unit 22d that performs printing in black have been described as being configured to form the printing unit 20a (20b). The fourth printing unit 22d that performs printing is arranged in the first stage, and the first printing unit 22a that performs cyan printing, the second printing unit 22b that performs magenta printing, and the third printing that performs yellow printing. The printing unit 20a (20b) may be configured by stacking the units 22c. When the fourth printing unit 22d serving as the reference cylinder is arranged in the first stage as described above, the correction operation directions in the vertical direction and the left-right direction of the plate cylinders 23a and 23a ′ in the feedforward control are the same as the reference cylinder. The fourth printing unit 22d is set in the direction opposite to the correction operation direction when the fourth printing unit 22d is arranged in the fourth stage.

  It is clear from the description of the scope of claims that the above modifications are included in the scope of the present invention.

  1,1 'web offset printing press, 10a, 10b paper feeding unit, 20a, 20b printing unit, 22a-22d printing unit, 23a, 23a' printing cylinder, 24 printing cylinder driving means, 51 outfeed roller mechanism, 52a, 52b Out feed roller, 53 Out feed roller driving means, R web, W continuous paper

Claims (2)

A printing section configured to overprint continuous paper; and
A paper feeding unit that sequentially feeds a plurality of webs to supply the continuous paper to the printing unit;
An offset rotary printing press comprising an outfeed roller mechanism provided downstream of the printing unit and configured to pull the continuous paper discharged from the printing unit,
The printing unit includes a plurality of printing units each having a printing cylinder and a printing cylinder driving unit that rotationally drives the printing cylinder, and automatic registration adjustment control configured to detect misregistration of each printing cylinder with respect to the continuous paper. A plate cylinder fine movement adjustment mechanism configured to be able to adjust the registration deviation between each plate cylinder,
The outfeed roller mechanism includes an outfeed roller that pulls the continuous paper, and an outfeed roller driving unit that rotates the outfeed roller independently of the printing cylinder driving unit, the outfeed roller driving unit By changing the relative speed with the surface speed of the plate cylinder by, is configured to be able to adjust the draw rate of the continuous paper,
The paper feeding unit is configured to output a paper splicing signal when splicing from the old web to the new web,
The printing unit selectively performs feedback control for correcting the registration deviation based on the registration deviation detected by the automatic registration adjustment control unit, and feedforward control for correcting the registration deviation based on a predetermined set value. Configured to be executable and configured to switch from the feedback control to the feedforward control based on the splicing signal;
The offset rotary printing press, wherein the outfeed roller mechanism is configured to pull the continuous paper at a drawing rate lower than a preset normal drawing rate based on the paper splicing signal. A printing control method performed using the offset rotary printing press according to claim 1,
A control switching step of switching from the feedback control to the feedforward control based on the splicing signal; and a pulling rate changing step of changing the pulling rate of the outfeed roller mechanism to a pulling rate lower than a pulling rate at a normal time; The printing control method of the offset rotary printing press characterized by performing this.

Images