Print control device, print control method, and print control program

Abstract

To provide a printing controlling device and the like which perform secondary printing accurately on an object to be printed after insertion patching.SOLUTION: A printing controlling device 4 of a printing apparatus provided with a rotatable plate cylinder 13 which performs secondary printing to a moving web after receiving primary printing includes an insertion patching error detection part 40 which detects insertion patching error when insertion-patching a second web 50B with respect to the first web 50A during secondary printing and a rotation angle correction part 44 which corrects a rotation angle of the plate cylinder 13 when performing secondary printing on a second web 50B. The insertion patching error detection part 40 includes a first mark position detection part 41 including a mark detection part 411 which detects a first mark printed on the first web 50A upon the first printing, a first movement quantity detection part 412 which detects a movement quantity of the first web 50A and a first mark position calculation part 413 which calculates a position of the first mark with respect to a paper patching position RC on which the second web 50B is insertion-patched based on the detected first mark and the detected movement quantity.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a print control device and the like. [Background technology]

[0002] A rotary press, which is a printing device that prints on a substrate such as a web of paper, is equipped with multiple printing units that sequentially print each color, such as cyan (C), magenta (M), yellow (Y), and black (K). Aligning the position of the printing plates for each color is called "registration," and there is known register control technology that adjusts the feed speed of each part of the substrate to minimize register error, which is the misalignment of the printing plates for each color.

[0003] In Patent Document 1, each printing unit prints register marks at predetermined positions on the printing substrate to detect register errors. When there is no register error, the spacing between the two-color register marks printed by two adjacent printing units on the same substrate is a constant value. However, when there is a register error, the spacing between the register marks of adjacent colors deviates from this constant value. To simultaneously detect such register marks of adjacent colors, a mark sensor is used, equipped with two photodetector elements spaced at the same interval. The difference between the actual spacing between the register marks of adjacent colors that can be detected by this mark sensor and the desired constant value is the register error, and register control is performed to minimize it. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-177019 Summary of the Invention [Problem to be solved by the invention]

[0005] In conventional printing machines, a so-called overprinting process is sometimes performed, in which a secondary print is performed on a roll that has already been subjected to a primary print. Also, a so-called splicing process is sometimes performed, in which a "new" roll is spliced ​​onto an "old" roll during printing, switching between the old and new rolls with little or no downtime from the printing machine. In "overprinting splicing," which combines overprinting and splicing, a "new" roll that has undergone primary printing is spliced ​​onto an "old" roll that has undergone primary printing during secondary printing. If an error occurs in the relative positions of the new and old rolls that have undergone primary printing during splicing, the "new" roll that has undergone primary printing cannot be properly subjected to secondary printing after splicing.

[0006] The present invention has been made in view of the above circumstances, and has an object to provide a print control device and the like that can correctly perform secondary printing on a printing substrate after a transition. [Means for solving the problem]

[0007] In order to solve the above problem, one embodiment of the printing control device of the present invention is a printing control device for a printing device equipped with a rotatable plate cylinder that performs secondary printing on a moving substrate that has been subjected to primary printing, and is equipped with an insertion error detection unit that detects an insertion error when inserting a second substrate onto a first substrate during secondary printing, and a rotation angle correction unit that corrects the rotation angle of the plate cylinder when performing secondary printing on the second substrate based on the insertion error.

[0008] In this embodiment, the rotation angle of the plate cylinder is corrected based on the insertion error when the second printing material is inserted onto the first printing material, so that secondary printing can be performed correctly on the second printing material after insertion.

[0009] Another aspect of the present invention is a printing control method for a printing device including a rotatable plate cylinder that performs secondary printing on a moving substrate that has been subjected to primary printing, the method comprising: an insertion error detection step that detects an insertion error when a second substrate is inserted onto the first substrate during the secondary printing; and a rotation angle correction step that corrects the rotation angle of the plate cylinder when performing secondary printing on the second substrate based on the insertion error.

[0010] Any combination of the above components and any conversion of these expressions into methods, devices, systems, recording media, computer programs, etc. are also encompassed by the present invention. [Effects of the Invention]

[0011] According to the present invention, secondary printing can be correctly performed on the printing substrate after joining. [Brief explanation of the drawings]

[0012] [Figure 1] 1 illustrates a schematic configuration of a printing device controlled by a print control device. [Figure 2] The relative positions of the register marks for each color are shown. [Figure 3] 1 shows a schematic configuration of a printing unit. [Figure 4] FIG. 2 is a functional block diagram of a print control device that controls a printing device that performs additional printing splicing. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, a mode for carrying out the present invention (hereinafter also referred to as an embodiment) will be described in detail with reference to the drawings. In the description and / or drawings, identical or equivalent components, members, processes, etc. will be assigned the same reference numerals, and redundant explanations will be omitted. The scale and shape of each part shown in the drawings are set for convenience to simplify the explanation, and should not be interpreted as limiting unless otherwise specified. The embodiment is an example and does not limit the scope of the present invention in any way. All features and combinations thereof described in the embodiment are not necessarily essential to the present invention.

[0014] FIG. 1 illustrates a schematic diagram of a printing apparatus 10 controlled by a print control device according to an embodiment of the present invention. The printing apparatus 10 may be a rotary press (as shown) that prints on a roll or web of paper, or it may be a device that prints on any substrate, not limited to paper, or a printing apparatus in the broader sense that performs a shape-fixing process such as embossing on any substrate. The printing apparatus 10, which is a rotary press, includes a first printing unit 11A that prints cyan (C), a second printing unit 11B that prints magenta (M), a third printing unit 11C that prints yellow (Y), and a fourth printing unit 11D that prints black (K), as well as a register control device 30. Hereinafter, the first printing unit 11A, the second printing unit 11B, the third printing unit 11C, and the fourth printing unit 11D are collectively referred to as printing units 11. The printing colors of each printing unit 11 are not limited to the above CMYK, and any printing colors can be assigned in any order to each printing unit 11. In order to print more colors, five or more printing units may be provided.

[0015] The first printing unit 11A includes a first plate cylinder 13A, a first impression cylinder 17A, a first drive motor 19A, a first encoder 21A, and a first mark sensor 23A. The second printing unit 11B includes a second plate cylinder 13B, a second impression cylinder 17B, a second drive motor 19B, a second encoder 21B, and a second mark sensor 23B. The third printing unit 11C includes a third plate cylinder 13C, a third impression cylinder 17C, a third drive motor 19C, a third encoder 21C, and a third mark sensor 23C. The fourth printing unit 11D includes a fourth plate cylinder 13D, a fourth impression cylinder 17D, a fourth drive motor 19D, a fourth encoder 21D, and a fourth mark sensor 23D. In the following, the first plate cylinder 13A, the second plate cylinder 13B, the third plate cylinder 13C, and the fourth plate cylinder 13D will be collectively referred to as plate cylinders 13, the first impression cylinder 17A, the second impression cylinder 17B, the third impression cylinder 17C, and the fourth impression cylinder 17D will be collectively referred to as impression cylinders 17, the first drive motor 19A, the second drive motor 19B, the third drive motor 19C, and the fourth drive motor 19D will be collectively referred to as drive motors 19, the first encoder 21A, the second encoder 21B, the third encoder 21C, and the fourth encoder 21D will be collectively referred to as encoders 21, and the first mark sensor 23A, the second mark sensor 23B, the third mark sensor 23C, and the fourth mark sensor 23D will be collectively referred to as mark sensors 23.

[0016] In the printing device 10, printing units 11 are installed along the moving direction of the web 50 or roll of paper serving as the printing substrate (generally from left to right in FIG. 1 ), and print each color on the web 50. As the web 50 moves along a moving path formed by a plurality of guide rollers 25 and each impression cylinder 17, images of each color are printed sequentially onto the web 50 using printing plates wound around each plate cylinder 13 of each printing unit 11.

[0017] Each plate cylinder 13 is provided with a mark printing unit 15 that prints marks of each color, such as register marks used for register control, onto the web 50. Figure 2(a) shows the positional relationship of a first register mark 53A, a second register mark 53B, a third register mark 53C, and a fourth register mark 53D (hereinafter collectively referred to as register marks 53) when there is no register error, which is the misalignment of the printing plates on each plate cylinder 13, and Figure 2(b) shows the positional relationship of the register marks 53 of each color when there is a register error.

[0018] The reference mark 52 shown in FIG. 2(a) (not shown in FIG. 2(b)) is printed when the printing device 10 performs a secondary printing on the web 50 that has been subjected to the primary printing. Specifically, the mark printing section 15 of the first printing unit 11A, which prints the first color in the primary printing, prints the reference mark 52 on the web 50 along with the first register mark 53A. The reference mark 52 is also called a cut mark because it may indicate the cutting position of the web 50 after printing is completed. Note that trim marks, also known as registration marks, may also be used as the reference mark 52.

[0019] The first register mark 53A is printed at a predetermined first position on the web 50 by the mark printing unit 15 of the first plate cylinder 13A, the second register mark 53B is printed at a predetermined second position on the web 50 by the mark printing unit 15 of the second plate cylinder 13B, the third register mark 53C is printed at a predetermined third position on the web 50 by the mark printing unit 15 of the third plate cylinder 13C, and the fourth register mark 53D is printed at a predetermined fourth position on the web 50 by the mark printing unit 15 of the fourth plate cylinder 13D.

[0020] The first position (53A), second position (53B), third position (53C), and fourth position (53D) of each register mark 53 are arranged at approximately equal intervals along the moving direction of the web 50, which is the vertical direction in FIG. 2 . The mark printing unit 15 for each color prints each register mark 53 (and the reference mark 52 during the primary printing of the overprint) on the web 50 once each time each plate cylinder 13 rotates. Therefore, the register marks 53 and reference marks 52 for each color are printed on the web 50 along the moving direction at predetermined intervals corresponding to the outer periphery or circumference of each plate cylinder 13 (typically equal for all plate cylinders 13A, 13B, 13C, and 13D). For example, although not shown, similar first register marks 53A and reference marks 52 are printed on the web 50 above and below the first register mark 53A and reference mark 52 in FIG. 2( a) at positions spaced apart by the outer periphery of the first plate cylinder 13A.

[0021] 2(a), where there is no registration error, the register marks 53 are printed at regular positions along the moving direction of the web 50 (the up-and-down direction in FIG. 2) at equal intervals L1. That is, the relative distance between the first position where the first register mark 53A is printed and the second position where the second register mark 53B is printed, the relative distance between the second position where the second register mark 53B is printed and the third position where the third register mark 53C is printed, and the relative distance between the third position where the third register mark 53C is printed and the fourth position where the fourth register mark 53D is printed are all equal to the predetermined interval L1.

[0022] On the other hand, in Figure 2(b), where there is a registration error, at least one register mark 53 is printed misaligned from its correct position. In the example shown, second register mark 53B is printed misaligned from its correct position. In this case, the relative distance between first register mark 53A and second register mark 53B is smaller than the correct spacing L1, and this difference is a registration error. Similarly, the relative distance between second register mark 53B and third register mark 53C is larger than the correct spacing L1, and this difference is a registration error.

[0023] As described above, the reference mark 52 is printed in the same color as the first register mark 53A by the mark printing section 15 of the first printing unit 11A during the primary printing of the overprint. The register marks 53A to 53D of each color are printed at approximately equal intervals within a band-shaped region 51 extending in the moving direction of the web 50 (the up-and-down direction in FIG. 2), while the reference mark 52 is printed outside the band-shaped region 51. The reference mark 52 and the first register mark 53A, which are printed approximately simultaneously by the mark printing section 15 of the first printing unit 11A, are preferably printed at approximately the same position in the moving direction of the web 50. In the illustrated example, the bottom side of the rectangular reference mark 52 and the bottom side of the right-angled triangular first register mark 53A are on the same straight line in the left-right direction (the direction perpendicular to the moving direction).

[0024] Other patterns and information (not shown) may also be printed in the strip-shaped area 51 on which the register marks 53 of each color are printed. For this reason, in the mark sensor 23 (described below) that detects the register marks 53 adjacent in the movement direction in the strip-shaped area 51, the detection time period is limited by a gate to prevent erroneous detection due to other patterns and information in the strip-shaped area 51. On the other hand, the reference mark 52 is printed outside the strip-shaped area 51, and no other patterns or information are printed in the strip-shaped area including it. For this reason, the mark sensor 23 and other mark detection units that detect the reference mark 52 do not need to limit the detection time period by a gate.

[0025] In the above example, the mark printing unit 15 of the first printing unit 11A printed the reference marks 52 during the primary printing of the overprinting. However, the mark printing units 15 of the other printing units 11B to 11D may print the reference marks 52 during the primary printing of the overprinting. Also, the mark printing unit that prints the reference marks 52 may be provided separately from the mark printing unit 15 that prints the register marks 53. Furthermore, the reference marks 52 may be printed at any position outside the band-shaped region 51, and the reference marks 52 and the register marks 53 do not have to be printed at approximately the same position in the moving direction of the web 50 as in the illustrated example. Also, the reference marks 52 may be printed in advance on the web 50 before the primary printing.

[0026] Returning to Figure 1, each printing unit 11 prints one image of each color onto the web 50 by rotating each plate cylinder 13, which has the same circumferential length, once, and this process is repeated to perform continuous printing. Each plate cylinder 13 is rotated by a corresponding drive motor 19. During printing operations of the printing device 10, the drive motors 19 are electrically synchronized with each other to rotate each plate cylinder 13 at approximately the same rotational speed.

[0027] Each encoder 21, which is attached to the rotary shaft of each drive motor 19, is, for example, an incremental encoder. This encoder 21 outputs a predetermined number (plurality) of A-phase and B-phase pulse signals and one Z-phase pulse signal for each rotation of the plate cylinder 13. The A-phase and B-phase pulse signals are counted by a counter, and the count value is reset by the Z-phase pulse signal. The count value of the A-phase and B-phase pulse signals, which increases with each rotation of the plate cylinder 13, represents the phase or rotational position of the plate cylinder 13. Note that the encoder 21 may also be any other type of phase detector or rotational position detector, such as an absolute type.

[0028] FIG. 3 shows a schematic diagram of the configuration of each printing unit 11. The mark sensor 23, located downstream of the plate cylinder 13 in the direction of movement of the web 50 (upper right in FIG. 3), includes multiple (two in FIG. 3) photodetector elements T1 and T2. In the mark sensors 23B-23D of the second- and subsequent-color printing units 11B-11D, the two photodetector elements T1 and T2 are spaced apart along the direction of movement of the web 50 (the vertical direction in FIG. 3). Specifically, the distance along the direction of movement between the upstream first photodetector element T1 and the downstream second photodetector element T2 is approximately equal to the predetermined distance L1 in FIG. 2. Therefore, register marks 53A-53D that are printed at the predetermined distance L1 and adjacent in the direction of movement are detected by the two photodetector elements T1 and T2 approximately simultaneously.

[0029] In the mark sensor 23A of the first-color printing unit 11A, two photodetection elements T1 and T2 are arranged at a distance from each other along a direction perpendicular to the moving direction of the web 50 (the left-right direction in FIG. 3). The first photodetection element T1, which serves as a register mark detection unit, detects register marks 53A-53D within the band-shaped region 51 in FIG. 2, and the second photodetection element T2, which serves as a reference mark detection unit, detects the reference mark 52 outside the band-shaped region 51 in FIG. 2. Note that, during the primary overprinting, only the first register mark 53A and the reference mark 52 have been printed on the web 50 that passes through the detection area of ​​the first mark sensor 23A; the subsequent register marks 53B-53D have not yet been printed. On the other hand, the web 50 that passes through the detection area of ​​the first mark sensor 23A during the secondary printing of the overprinting has printed thereon the first register mark 53A from the secondary printing, as well as the four register marks 53A to 53D from the primary printing and the reference mark 52, and can therefore be detected by the two photodetection elements T1 and T2 of the first mark sensor 23A.

[0030] The distance between the first photodetector element T1 and the second photodetector element T2 in the first mark sensor 23A is adjusted to match the left-right distance between the first register mark 53A and the reference mark 52 in FIG. 2. If the distance between the register mark 53A and the reference mark 52 is smaller than the predetermined distance L1, the distance between the first photodetector element T1 and the second photodetector element T2 in the first mark sensor 23A may remain the same as the predetermined distance L1 in the other mark sensors 23B to 23D. In this case, the first mark sensor 23A, in which the distance between the two photodetector elements T1 and T2 is L1, can be rotated within the plane of FIG. 3 and tilted at an appropriate angle between 0 and 90 degrees with respect to the vertical web 50, so that the left-right distance between the two photodetector elements T1 and T2 can be made to match the left-right distance between the first register mark 53A and the reference mark 52. In this way, when the distance between the register mark 53A and the reference mark 52 is equal to or less than the predetermined interval L1, the mark sensors 23B to 23D in which the interval between the two photodetecting elements T1 and T2 is L1 can be used as the first mark sensor 23A as is.

[0031] 1 adjusts the rotation angle (phase) of each corresponding plate cylinder 13 using each drive motor 19 to minimize the register error between adjacent colors detected by each mark sensor 23 (particularly second mark sensor 23B through fourth mark sensor 23D). Specifically, second mark sensor 23B detects the distance between first register mark 53A of the first color and second register mark 53B of the second color, and the difference between this distance and the normal distance L1 is the register error between the first and second colors. Third mark sensor 23C detects the distance between first register mark 53A of the first color and second register mark 53B of the second color, and the distance between second register mark 53B of the second color and third register mark 53C of the third color, and the difference between these distances and the normal distance L1 is the register error between the first and second colors and between the second and third colors. Fourth mark sensor 23D detects the distance between first register mark 53A of the first color and second register mark 53B of the second color, the distance between second register mark 53B of the second color and third register mark 53C of the third color, and the distance between third register mark 53C of the third color and fourth register mark 53D of the fourth color, and the difference between each of these distances and the normal distance L1 represents the misregister between the first and second colors, the misregister between the second and third colors, and the misregister between the third and fourth colors. Note that in the secondary printing of overprints, mark sensor 23 may also detect the misregister between register marks 53 from the secondary printing and those from the previous primary printing.

[0032] FIG. 4 is a functional block diagram of a print control device 4 that controls a printing device 10 that performs splicing. The print control device 4 includes a first mark position detection unit 41, a second mark position detection unit 42, a splice error calculation unit 43, and a rotation angle correction unit 44. The first mark position detection unit 41, the second mark position detection unit 42, and the splice error calculation unit 43 constitute the splice error detection unit 40. These functional blocks are realized by the cooperation of hardware resources such as a computer's central processing unit, memory, input devices, output devices, and peripheral devices connected to the computer, as well as software executed using these resources. Regardless of the type or location of the computer, each of the above functional blocks may be realized by the hardware resources of a single computer or by combining hardware resources distributed across multiple computers.

[0033] Print splicing refers to the combined process of printing a secondary print onto webs 50A and 50B that have undergone primary printing and splicing a new web 50B onto the old web 50A during printing. In the example shown in FIG. 4, a second web 50B, serving as a new second substrate, is spliced ​​onto a first web 50A, serving as the old first substrate during secondary printing. The first and second webs 50A and 50B have undergone primary printing, with the primary print patterns shown as P1 and P2. The first web 50A is wound around a first rotating shaft 61, and the second web 50B is wound around a second rotating shaft 62. Rotation of the first rotating shaft 61 feeds the first web 50A, which has undergone primary printing, in the direction of travel, and rotation of the second rotating shaft 62 feeds the second web 50B, which has undergone primary printing, in the direction of travel.

[0034] FIG. 4A shows the printing apparatus 10 during splicing from a first web 50A to a second web 50B. The first web 50A, fed from a first rotating shaft 61, and the second web 50B, fed from a second rotating shaft 62, are joined together at a splicing position RC. A cutting unit 63, such as a cutter, provided immediately before the splicing position RC (on the left side in FIG. 4) cuts only the first web 50A. As a result, the web 50, which serves as the printing substrate of the printing apparatus 10, is made up of only the first web 50A after the splicing position RC (on the right side in FIG. 4), except for short sections where the first web 50A and the second web 50B overlap immediately before and after the splicing position RC, and is made up of only the second web 50B before the splicing position RC (on the left side in FIG. 4).

[0035] If an error occurs in the relative positions of the first and second webs 50A, 50B, which have undergone primary printing during splicing, the secondary printing cannot be performed correctly on the spliced ​​second web 50B. For example, as shown in FIG. 4A, in the overlapping section of the first and second webs 50A, 50B, immediately after the splicing position RC, the primary printed image P1' on the first web 50A and the primary printed image P2' on the second web 50B should be aligned. However, they may be misaligned in the direction of movement due to disturbances or other factors. Because the plate cylinders 13 of each printing unit 11 of the printing device 10 are register-controlled with respect to the first web 50A before splicing, if secondary printing is performed on the spliced ​​second web 50B under these conditions, the secondary printed image will be misaligned from the primary printed image.

[0036] 4A, the phase (rotation angle) of the plate cylinder 13 is controlled so that the secondary printed pattern P3 is printed superimposed on the primary printed pattern P1 of the first web 50A. If this were to continue, the secondary printed pattern P3 would be printed at the position of the primary printed pattern P1 of the first web 50A before splicing, rather than at the position of the primary printed pattern P2 of the second web 50B. For example, in the overlapping section of the first web 50A and the second web 50B immediately after the splicing position RC, the secondary printed pattern P3 of the plate cylinder 13 would be printed superimposed on the primary printed pattern P1' of the first web 50A, rather than the primary printed pattern P2' of the second web 50B. As will be described below, the printing control device 4 of this embodiment allows correct secondary printing to be performed on the spliced ​​second web 50B.

[0037] The splicing error detection unit 40 of the print control device 4 has a first mark position detection unit 41 that detects the positions of first marks printed on the first web 50A at predetermined intervals along the movement direction during primary printing relative to the splice position RC, a second mark position detection unit 42 that detects the positions of second marks printed on the second web 50B at predetermined intervals along the movement direction during primary printing relative to the splice position RC, and a splicing error calculation unit 43 that calculates a splicing error based on the difference between the positions of the first marks detected by the first mark position detection unit 41 and the second marks detected by the second mark position detection unit 42. Here, the reference marks 52 described in FIG. 2 are suitable as the first marks printed on the first web 50A and the second marks printed on the second web 50B. As described above, the reference marks 52 are printed on the first web 50A and the second web 50B at a predetermined interval corresponding to the outer circumference of the first plate cylinder 13A by the mark printing section 15 of the first printing unit 11A, which prints the first color in the primary printing.

[0038] The first mark position detection unit 41 includes a mark detection unit 411, a first movement amount detection unit 412, and a first mark position calculation unit 413. The mark detection unit 411 detects the intervals between reference marks 52, which serve as first marks, printed on the first web 50A during primary printing. In the example of FIG. 4A, a sensor or the like capable of measuring the reference marks 52 that move between the splice position RC and the downstream length measurement roll 64 is provided as the mark detection unit 411. As described above, the reference marks 52 are printed outside the band-shaped region 51 (FIG. 2), and no other images or information are printed in the band-shaped region including the reference marks 52. Therefore, the mark detection unit 411 that detects the reference marks 52 does not need to limit the detection time period by a gate, as is the case with the mark sensors 23B to 23D.

[0039] The first movement amount detection unit 412 detects the movement amount of the first web 50A. The first movement amount detection unit 412 can be configured with an encoder, phase detector, rotational position detector, etc. that detects the rotation angle (phase) of any rotating member, including the first rotating shaft 61 that transports the first web 50A and the plate cylinder 13. In the example of FIG. 4, the first movement amount detection unit 412 is configured with an encoder that detects the rotation angle of the length measuring roll 64. The first mark position calculation unit 413 calculates the position of the first mark relative to the splice position RC based on the interval between the reference marks 52 as the first marks detected by the mark detection unit 411 and the movement amount of the first web 50A detected by the first movement amount detection unit 412. For example, the first mark position calculation unit 413 can calculate the position of the first mark (e.g., the reference mark 52 printed together with the primary print pattern P1′) relative to the splice position RC at any time based on the movement amount of the first web 50A after the mark detection unit 411 detects the first mark.

[0040] The second mark position detection unit 42 includes a rotation angle storage unit 421, a second movement amount detection unit 422, and a second mark position calculation unit 423. The rotation angle storage unit 421 stores the position of at least one second mark (for example, a reference mark 52 printed together with the primary print pattern P2′) as the rotation angle (phase) of the second rotation axis 62.

[0041] The second movement amount detection unit 422 detects the amount of movement of the second web 50B. The second movement amount detection unit 422 can be configured with an encoder, phase detector, rotational position detector, etc. that detects the rotation angle (phase) of any rotating member, including the second rotating shaft 62 that transports the second web 50B and the plate cylinder 13. In the example of Fig. 4, the second movement amount detection unit 422 is configured with an encoder that detects the rotation angle of the length measuring roll 64, similar to the first movement amount detection unit 412. The second mark position calculation unit 423 calculates the position of the second mark relative to the splice position RC based on the rotation position of the second mark stored in the rotation angle memory unit 421 and the amount of movement of the second web 50B detected by the second movement amount detection unit 422. For example, the second mark position calculation unit 423 can calculate the position of the second mark (for example, a reference mark 52 printed together with the primary printed pattern P2') relative to the splice position RC at any time based on the amount of movement of the second web 50B from the rotation position of the second mark stored in the rotation angle memory unit 421.

[0042] The splicing error calculation unit 43 calculates a splicing error as an splicing error when splicing the second web 50B to the first web 50A during secondary printing, based on the difference between the position of the first mark (for example, the reference mark 52 printed together with the primary printed pattern P1') detected by the first mark position detection unit 41 and the position of the second mark (for example, the reference mark 52 printed together with the primary printed pattern P2') detected by the second mark position detection unit 42. The splicing error detection unit 40 may be configured with a sensor or the like capable of directly detecting the difference in position between the reference mark 52 as the first mark printed together with the primary printed pattern P1' and the reference mark 52 as the second mark printed together with the primary printed pattern P2' in the overlapping section of the first web 50A and the second web 50B immediately after the splicing position RC.

[0043] The rotation angle correction unit 44 corrects the rotation angle (phase) of the plate cylinder 13 when secondary printing is performed on the second web 50B, using the drive motor 19, based on the splice error detected by the splice error detection unit 40. As shown in Fig. 4B after a certain time has elapsed since the splice performed in Fig. 4A, the phase of the plate cylinder 13 is corrected when the printing device 10 performs secondary printing on the spliced ​​second web 50B, so that the secondary print pattern P3 on the plate cylinder 13 is correctly printed so as to overlap the primary print pattern P2 on the second web 50B, not the primary print pattern P1' on the first web 50A.

[0044] The present invention has been described above based on the embodiments. Various modifications are possible to the combinations of the components and processes in the exemplary embodiments, and it will be obvious to those skilled in the art that such modifications are included within the scope of the present invention.

[0045] In the embodiment, the web 50, which is a roll of paper, is used as an example of the printing substrate, but the printing device 10 can print on any substrate. For example, the printing substrate may be a sheet made of any material, or the surface of a solid object of any shape, such as a container or a product.

[0046] The configuration, operation, and function of each device and method described in the embodiments can be realized by hardware resources, software resources, or a combination of hardware and software resources. Examples of hardware resources include processors, ROMs, RAMs, and various integrated circuits. Examples of software resources include operating systems, applications, and other programs. [Explanation of symbols]

[0047] 4 Printing control device, 10 Printing device, 11 Printing unit, 13 Plate cylinder, 15 Mark printing unit, 19 Drive motor, 21 Encoder, 23 Mark sensor, 30 Register control device, 40 Interleaving error detection unit, 41 First mark position detection unit, 42 Second mark position detection unit, 43 Interleaving error calculation unit, 44 Rotation angle correction unit, 50 Web, 50A First web, 50B Second web, 51 Band-shaped area, 52 Reference mark, 53 Register mark, 61 First rotation axis, 62 Second rotation axis, 63 Cutting unit, 411 Mark detection unit, 412 First movement amount detection unit, 413 First mark position calculation unit, 421 Rotation angle memory unit, 422 Second movement amount detection unit, 423 Second mark position calculation unit, T1 First light detection element, T2 Second light detection element.

Claims

1. A printing control device for a printing device including a rotatable plate cylinder that applies a secondary print to a moving printing substrate that has been subjected to a primary print, a splice error detection unit that detects a splice error when splicing a second printing material onto a first printing material during the secondary printing; a rotation angle correction unit that corrects a rotation angle of the plate cylinder when performing secondary printing on the second printing material based on the splice error; Equipped with The splicing error detection unit a mark detection unit that detects first marks printed on the first substrate at predetermined intervals along the moving direction during the primary printing; a first movement amount detection unit that detects a movement amount of the first printing material; a first mark position calculation unit that calculates a position of the first mark relative to a joining position where the second substrate is joined based on the detected first mark and the detected movement amount; a second mark position detection unit that detects the position of second marks printed on the second substrate at predetermined intervals along the movement direction during the primary printing relative to the transition position; a splicing error calculation unit that calculates the splicing error based on a difference between the position of the first mark calculated by the first mark position calculation unit and the position of the second mark detected by the second mark position detection unit; A print control device comprising:

2. The second mark position detection unit a rotation angle storage unit that stores the position of at least one of the second marks as a rotation angle of a rotation axis that feeds the wound second substrate in a movement direction; a second movement amount detection unit that detects the movement amount of the second printing material; a second mark position calculation unit that calculates a position of the second mark relative to the transition position based on the stored rotation angle and the detected movement amount; The print control device according to claim 1 , comprising:

3. 3. The print control device according to claim 1, wherein the first substrate and the second substrate are paper, and the splicing error is a paper splicing error.

4. A printing control method for a printing device having a rotatable plate cylinder that applies a secondary print to a moving printing substrate that has been subjected to a primary print, comprising: a splice error detection step of detecting a splice error when splicing a second printing material onto a first printing material during the secondary printing; a rotation angle correcting step of correcting a rotation angle of the plate cylinder when performing secondary printing on the second printing material based on the splice error; Equipped with The splicing error detection step includes: a mark detection step of detecting first marks printed on the first substrate at predetermined intervals along the movement direction during the primary printing; a first movement amount detection step of detecting a movement amount of the first printing material; a first mark position calculation step of calculating a position of the first mark relative to a joining position where the second substrate is joined based on the detected first mark and the detected movement amount; a second mark position detection step of detecting positions of second marks printed on the second substrate at predetermined intervals along the movement direction during the primary printing relative to the transition position; a step of calculating the splice error based on a difference between the position of the first mark calculated in the first mark position calculation step and the position of the second mark detected in the second mark position detection step; A printing control method comprising:

5. A printing control program for a printing device having a rotatable plate cylinder that applies a secondary print to a moving printing substrate that has been subjected to a primary print, comprising: a splice error detection step of detecting a splice error when splicing a second printing material onto a first printing material during the secondary printing; a rotation angle correcting step of correcting a rotation angle of the plate cylinder when performing secondary printing on the second printing material based on the splice error; on the computer, The splicing error detection step includes: a mark detection step of detecting first marks printed on the first substrate at predetermined intervals along the movement direction during the primary printing; a first movement amount detection step of detecting a movement amount of the first printing material; a first mark position calculation step of calculating a position of the first mark relative to a joining position where the second substrate is joined based on the detected first mark and the detected movement amount; a second mark position detection step of detecting positions of second marks printed on the second substrate at predetermined intervals along the movement direction during the primary printing relative to the transition position; a step of calculating the splice error based on a difference between the position of the first mark calculated in the first mark position calculation step and the position of the second mark detected in the second mark position detection step; A printing control program comprising:

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