KR20230135506A - Device for controlling printing, and method for controlling printing, computer recordable medium storing printing control program - Google Patents

Abstract

Provided is a printing control device that can correctly perform secondary printing on a printed object after joint insertion.
The printing control device 4 of the printing device provided with a rotatable plate 13 that performs secondary printing on the moving web on which primary printing has been performed is a second printing device with respect to the first web 50A undergoing secondary printing. The joint insertion error detection unit 40 detects the joint insertion error when inserting the web 50B, and the rotation angle of the plate 13 when secondary printing is performed on the second web 50B. It is provided with a rotation angle correction unit 44 that corrects based on the error. The joint insertion error detection unit 40 includes a mark detection unit 411 that detects the first mark printed on the first web 50A during primary printing, and a first movement amount that detects the movement amount of the first web 50A. A detection unit 412 and a first mark position calculation unit that calculates the position of the first mark with respect to the paper joint position (RC) where the second web 50B is subsequently inserted, based on the detected first mark and the detected movement amount. It is provided with a first mark position detection unit 41 including (413).

Description

A recording medium that can be read by a computer recording a print control device, a print control method, and a print control program {DEVICE FOR CONTROLLING PRINTING, AND METHOD FOR CONTROLLING PRINTING, COMPUTER RECORDABLE MEDIUM STORING PRINTING CONTROL PROGRAM}

This application claims priority based on Japanese Patent Application No. 2022-041746, filed on March 16, 2022. The entire contents of the application are incorporated by reference into this specification.

The present invention relates to a printing control device, etc.

A rotary press, a printing device that prints on printed materials such as roll paper, sequentially prints each color, such as cyan (C), magenta (M), yellow (Y), and black (K). It is provided with a plurality of printing units for printing. Aligning the positions of the plates of each color is called "calibration," and a scale control technology is known to adjust the transfer speed of each part of the printed object so that the measurement error, which is a misalignment of the plates of each color, is reduced. .

Each printing unit in Patent Document 1 prints a register mark for detection of measurement error at a predetermined position on the printed object. If there is no measurement error, the gap between the register marks of two colors printed on the same substrate by two adjacent printing units is a constant value, but if there is a measurement error, the gap between the register marks of adjacent colors varies from the constant value. escape In order to simultaneously detect register marks of adjacent colors, a mark sensor having two photodetector elements arranged at equal intervals is used. The difference between the actual interval between register marks of adjacent colors that can be detected by this mark sensor and the desired constant value is the measurement error, and measurement control is performed to reduce it.

Patent Document 1: Japanese Patent Application Laid-Open No. 2014-177019

In conventional printing devices, so-called overprinting, in which secondary printing is performed on winding paper on which primary printing has been performed, is sometimes performed. In addition, so-called paper splicing is sometimes performed by inserting a "new (next)" winding sheet into the "old (previous)" winding paper being printed, thereby switching between old and new winding paper with almost no stopping of the printing equipment. . In "overprint paper splicing," which involves overprinting and paper splicing, a "new" first-printed winding sheet is inserted into the "old" first-printed winding sheet undergoing secondary printing. Here, if an error occurs in the relative position of the new and old first-printed winding paper during paper splicing, secondary printing cannot be performed correctly on the “new” first-printed winding paper after paper splicing.

The present invention was made in consideration of this situation, and its purpose is to provide a printing control device that can correctly perform secondary printing on a printed object after seam insertion.

In order to solve the above problem, a printing control device of one aspect of the present invention is a printing control device of a printing device including a rotatable plate that performs secondary printing on a moving print object on which primary printing has been performed, comprising: 2 A seam insertion error detection unit that detects the seam insertion error when inserting a second printed object into the first printed object undergoing secondary printing, and the rotation angle of the plate when secondary printing is performed on the second printed object. It is equipped with a rotation angle correction unit that corrects based on the insertion error.

In this mode, since the rotation angle of the plate is corrected based on the seam insertion error when inserting the second printed object into the first printed object, secondary printing is performed correctly on the second printed object after joint insertion. can do.

Another aspect of the present invention is a printing control method. This method is a printing control method of a printing device equipped with a rotatable plate that performs secondary printing on a moving object on which primary printing has been performed, and is a method of controlling the printing of a second object with respect to the first object in secondary printing. It is equipped with a seam insertion error detection step that detects seam insertion error during subsequent insertion, and a rotation angle correction step that corrects the rotation angle of the plate when performing secondary printing on the second printed object based on the seam insertion error. do.

However, any combination of the above components or conversion of their expressions into methods, devices, systems, recording media, computer programs, etc. are also included in the present invention.

According to the present invention, secondary printing can be correctly performed on the printed object after joint insertion.

Figure 1 schematically shows the configuration of a printing device controlled by a printing control device.
Figure 2 shows the positional relationship of register marks of each color.
Figure 3 schematically shows the configuration of a printing unit.
Figure 4 is a functional block diagram of a printing control device that controls a printing device that performs overprinting paper splicing.

EMBODIMENT OF THE INVENTION Hereinafter, the form (hereinafter also referred to as embodiment) for carrying out the present invention will be described in detail, referring to the drawings. In the description and/or drawings, identical or equivalent components, members, processes, etc. are assigned the same reference numerals and redundant descriptions are omitted. The scale and shape of each part shown are conveniently set to simplify explanation and are not to be construed as limited unless otherwise specified. The embodiments are illustrative and in no way limit the scope of the present invention. All features or combinations thereof described in the embodiments are not necessarily limited to what is essential to the present invention.

Figure 1 schematically shows the configuration of a printing device 10 controlled by a printing control device according to an embodiment of the present invention. The printing device 10 may be a rotary press as shown using winding paper or a web as the object to be printed, or may be a device that prints on any object to be printed, not limited to paper, and may be used to perform embossing processing on any object to be processed. It may be a printing device in a broad sense that performs shape fixing processing, etc. The printing device 10, which is a rotary press, includes a first printing unit 11A for cyan (C) printing, a second printing unit 11B for magenta (M) printing, and yellow (Y) printing. It is provided with a third printing unit 11C that prints, a fourth printing unit 11D that prints black (K), and a measurement 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 the printing unit 11. The printing color of each printing unit 11 is not limited to the above CMYK, and any printing color can be assigned to each printing unit 11 in any order. To print more colors, five or more printing units may be provided.

The first printing unit 11A includes a first plate cylinder 13A, a first pressure cylinder 17A, a first drive motor 19A, a first encoder 21A, and a first mark sensor. (23A) is provided. The second printing unit 11B includes a second plate cylinder 13B, a second pressure cylinder 17B, a second drive motor 19B, a second encoder 21B, and a second mark sensor 23B. Equipped with The third printing unit 11C includes a third plate cylinder 13C, a third pressure cylinder 17C, a third drive motor 19C, a third encoder 21C, and a third mark sensor 23C. Equipped with The fourth printing unit 11D includes a fourth plate cylinder 13D, a fourth pressure cylinder 17D, a fourth drive motor 19D, a fourth encoder 21D, and a fourth mark sensor 23D. Equipped with Hereinafter, the first plate 13A, the second plate 13B, the third plate 13C, and the fourth plate 13D are collectively referred to as the plate 13, and the first plate 17A and the second plate 13D are collectively referred to as the plate 13. (17B), the third drive motor (17C), and the fourth drive motor (17D) are collectively referred to as the press drive (17), and the first drive motor (19A), the second drive motor (19B), and the third drive motor (19C) , the fourth drive motor (19D) is collectively referred to as the drive motor 19, and the first encoder (21A), the second encoder (21B), the third encoder (21C), and the fourth encoder (21D) are collectively referred to as the encoder. It is also referred to as (21), and the first mark sensor (23A), the second mark sensor (23B), the third mark sensor (23C), and the fourth mark sensor (23D) are collectively referred to as the mark sensor (23).

The printing device 10 prints the web 50 by means of each printing unit 11 installed along the moving direction (approximately from left to right in FIG. 1) of the web 50 as the object to be printed or the winding paper. Printing of each color is carried out. With respect to the web 50 moving along the movement path formed by the plurality of guide rollers 25 and each press 17, each color is printed by the printing plate wound on each plate 13 of each printing unit 11. The designs are printed sequentially.

Each plate 13 is provided with a mark printing unit 15 that prints marks of each color, such as register marks used for measurement control, on the web 50. Figure 2 (a) shows the first register mark 53A, the second register mark 53B, the third register mark 53C, and the 4 shows the positional relationship of the register marks 53D (hereinafter also collectively referred to as the register mark 53), and Figure 2(b) shows the positional relationship of the register marks 53 of each color when there is a measurement error. represents.

The reference mark 52 shown in (a) of FIG. 2 (not shown in (b) of FIG. 2) is a printing device ( 10) is printed when done. Specifically, the mark printing unit 15 of the first printing unit 11A, which prints the first color in primary printing, prints the reference mark 52 along with the first register mark 53A onto the web 50. ) to print. The reference mark 52 is also called a cut mark because it sometimes indicates the cutting position of the web 50 after printing is completed. However, a trim mark, also called a guide mark, may be used as the reference mark 52.

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 13A, and the second register mark 53B is printed at a first position on the web 50. 2 It is printed at a predetermined second position on the web 50 by the mark printing portion 15 of the plate cylinder 13B, and the third register mark 53C is printed on the mark printing portion of the third plate cylinder 13C ( 15), the fourth register mark 53D is printed at a predetermined third position on the web 50, and the fourth register mark 53D is printed on the web 50 by the mark printing portion 15 of the fourth plate 13D. is printed at the predetermined fourth position.

The first position 53A, the second position 53B, the third position 53C, and the fourth position 53D of each register mark 53 correspond to the movement of the web 50 in the vertical direction in FIG. 2. They are arranged at approximately equal intervals along the direction. In addition, the mark printing unit 15 of each color prints each register mark 53 (and the reference mark 52 during the first printing of overprinting) once each time each plate 13 rotates. Print at (50). For this reason, register marks (of each color) are placed on the web 50 at predetermined intervals corresponding to the outer circumference or circumference of each plate 13 (typically the same for all plates 13A, 13B, 13C, and 13D). 53) and reference marks 52 are printed along the moving direction. For example, although not shown, above and below the first register mark 53A and the reference mark 52 in Fig. 2(a), there is a position spaced apart from the outer circumference of the first plate 13A. The same first register mark 53A and reference mark 52 are printed on the web 50.

In Fig. 2(a), where there is no measurement error, each register mark 53 is printed at regular intervals (L1) at regular positions along the moving direction of the web 50 (up and down direction in Fig. 2). . 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 second position where the second register mark (53B) is printed, and Relative distance between the third position where the third register mark (53C) is printed, 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. , they are all set to the same predetermined interval (L1).

On the other hand, in Fig. 2(b) where there is a measurement error, at least one register mark 53 is printed deviated from the normal position. In the example shown, the second register mark 53B is printed offset from the normal position. In this case, the relative distance between the first register mark 53A and the second register mark 53B is smaller than the regular interval L1, and the difference becomes a measurement error. Likewise, the relative distance between the second register mark 53B and the third register mark 53C is larger than the regular interval L1, and the difference becomes the measurement error.

As described above, the reference mark 52 is printed in the same color as the first register mark 53A by the mark printing unit 15 of the first printing unit 11A during the first printing of overprinting. . While register marks 53A to 53D of each color are printed at approximately equal intervals inside the band-shaped area 51 extending in the moving direction (up and down direction in Fig. 2) of the web 50, reference marks 52 is printed outside the band area 51. The reference mark 52 and the first register mark 53A, which are printed at approximately the same time by the mark printing unit 15 of the first printing unit 11A, are printed at approximately the same position in the moving direction of the web 50. It is desirable to be In the example shown, the bottom of the rectangular reference mark 52 and the bottom of the right triangle-shaped first register mark 53A are on the same straight line in the left and right directions (direction perpendicular to the moving direction).

In the band area 51 where the register marks 53 of each color are printed, other designs or information not shown may also be printed. For this reason, in the mark sensor 23 described later, which detects register marks 53 adjacent in the moving direction in the band-shaped area 51, in order to prevent erroneous detection due to other designs or information in the band-shaped area 51, The detection time range is limited by the gate. Meanwhile, the reference mark 52 is printed outside the striped area 51, and no other designs or information are printed in the striped area including it. For this reason, in the mark sensor 23 and other mark detection units that detect the reference mark 52, there is no need to limit the detectable time period by a gate.

However, in the above example, the mark printing unit 15 of the first printing unit 11A printed the reference mark 52 during the first printing of overprinting, but the mark printing units of the other printing units 11B to 11D ( 15) The reference mark 52 may be printed during the first printing of overprinting. Additionally, the mark printing unit for printing the reference mark 52 may be provided separately from the mark printing unit 15 for printing the register mark 53. In addition, the reference mark 52 may be printed at an arbitrary position outside the band-shaped area 51, and as shown in the example, the reference mark 52 and the register mark 53 are aligned in the moving direction of the web 50. They do not have to be printed in roughly the same location. Additionally, the reference mark 52 may be previously printed on the web 50 before primary printing.

Returning to Fig. 1, each printing unit 11 prints a design of each color on the web 50 once by rotating each plate 13 of the same circumferential length once, and continuously prints by repeating this process. Each plate cylinder 13 is rotationally driven by each drive motor 19 installed in parallel with each plate. During the printing operation of the printing device 10, each drive motor 19 rotates each plate 13 at approximately the same rotational speed while being electrically synchronized with each other.

Each encoder 21 installed in parallel with the rotation axis of each drive motor 19 is, for example, an incremental encoder. This encoder 21 outputs a predetermined number (plural) of A-phase and B-phase pulse signals and one Z-phase pulse signal for each rotation of the plate cylinder 13. The pulse signals of phase A and B are counted by the counter, and the counting value is reset by the pulse signal of phase Z. The coefficient values of the A-phase and B-phase pulse signals that increase with each rotation of the plate cylinder 13 indicate the phase or rotational position of the plate cylinder 13. However, the encoder 21 may be a phase detector or a rotational position detector of any other type, such as an absolute type.

Figure 3 schematically shows the configuration of each printing unit 11. The mark sensor 23 provided on the downstream side (upper right side in FIG. 3) of the plate 13 in the moving direction of the web 50 includes a plurality of (two in the example of FIG. 3) photodetection elements ( T1, T2) are provided. In the mark sensors 23B to 23D of the second color and subsequent printing units 11B to 11D, the two photodetector elements T1 and T2 are spaced apart along the moving direction of the web 50 (up and down direction in FIG. 3). It is placed. Specifically, the distance between the first photodetector T1 on the upstream side and the second photodetector T2 on the downstream side along the moving direction is approximately the same as the predetermined distance L1 in FIG. 2 . For this reason, register marks 53A to 53D adjacent in the moving direction printed at predetermined intervals L1 are detected at approximately the same time by the two photodetector elements T1 and T2.

In the mark sensor 23A of the first color printing unit 11A, two photodetection elements T1 and T2 are arranged apart from each other along a direction perpendicular to the moving direction of the web 50 (left and right direction in FIG. 3). do. The first photodetector T1 as a register mark detection unit detects the register marks 53A to 53D inside the strip-shaped area 51 in FIG. 2, and the second photodetector T2 as a reference mark detection unit detects the register marks 53A to 53D in the band-shaped area 51 in FIG. 2. The reference mark 52 outside the band-shaped area 51 is detected. However, only the first register mark 53A and the reference mark 52 are printed on the web 50 that passes the detection area of the first mark sensor 23A during the first printing of overprinting, and the subsequent registers Marks (53B~53D) are not yet printed. On the other hand, during secondary printing of overprinting, the web 50 passing through the detection area of the first mark sensor 23A contains four marks by primary printing along with the first register mark 53A by secondary printing. Since the register marks 53A to 53D and the reference mark 52 are printed, they can be detected by the two photodetection elements T1 and T2 of the first mark sensor 23A.

The gap between the first photodetector T1 and the second photodetector T2 in the first mark sensor 23A is in the left and right direction between the first register mark 53A and the reference mark 52 in FIG. 2. is adjusted according to the distance. However, when the distance between the register mark 53A and the reference mark 52 is smaller than the predetermined interval L1, the first photodetector T1 and the second photodetector T2 in the first mark sensor 23A ) may be set to the same predetermined interval (L1) as the other mark sensors (23B to 23D). In this case, the first mark sensor 23A, whose spacing between the two photodetector elements T1 and T2 is L1, is rotated within the paper surface in FIG. 3, and is rotated at an angle of 0 degrees with respect to the web 50 in the vertical direction. By tilting and arranging them at an appropriate angle of 90 degrees, the left-right distance of the two photodetector elements T1 and T2 is made to match the left-right distance of 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 less than the predetermined interval L1, the mark sensors 23B to 23D where the two photodetector elements T1 and T2 have an interval L1 are used. 1 It can be used as is as a mark sensor (23A).

The scale control device 30 in FIG. 1 is configured to reduce the scale error between adjacent colors detected by each mark sensor 23 (particularly the second mark sensor 23B to the fourth mark sensor 23D). , the rotation angle (phase) of each corresponding plate cylinder 13 is adjusted by each drive motor 19. Specifically, the second mark sensor 23B detects the interval between the first register mark 53A of the first color and the second register mark 53B of the second color, and sets a regular interval L1 therebetween. The difference between becomes the measurement error between the first color and the second color. The third mark sensor 23C is configured to measure the gap between the first register mark 53A of the first color and the second register mark 53B of the second color, and the interval between the second register mark 53B of the second color and the third color. The interval between the third register marks 53C is detected, and the difference between each and the regular interval L1 is the measurement error between the first color and the second color, and the measurement error between the second color and the third color. do. The fourth mark sensor 23D is configured to determine the gap between the first register mark 53A of the first color and the second register mark 53B of the second color, and the interval between the second register mark 53B of the second color and the third color. The interval between the third register marks 53C, the interval between the third register mark 53C of the third color and the fourth register mark 53D of the fourth color is detected, and the difference between each and the normal interval L1 is detected. These are the measurement error between the first color and the second color, the measurement error between the second color and the third color, and the measurement error between the third color and the fourth color. However, in the secondary printing of overprinting, the measurement error between the register mark 53 from the secondary printing and the register mark 53 from the previous primary printing may be detected by the mark sensor 23.

Fig. 4 is a functional block diagram of the printing control device 4 that controls the printing device 10 that performs overprinting paper splicing. The printing control device 4 includes a first mark position detection unit 41, a second mark position detection unit 42, a joint insertion 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 joint insertion error calculation unit 43 constitute the joint insertion error detection unit 40. These functional blocks are realized through the cooperation of hardware resources such as the computer's central processing unit, memory, input device, output device, and peripheral devices connected to the computer, and software executed using them. Regardless of the type of computer or installation location, each of the above functional blocks may be realized with the hardware resources of a single computer or by combining hardware resources distributed across multiple computers.

Overprinting refers to overprinting, which involves performing secondary printing on webs (50A, 50B) on which primary printing has been performed, and inserting a “new” web (50B) into the “old” web (50A) being printed. The paper joining together is done together. In the example of Figure 4, a second web 50B as a "new" second substrate is subsequently inserted into the first web 50A as an "old" first substrate undergoing secondary printing. Primary printing is performed in advance on the first web 50A and the second web 50B, and the designs of each primary printing are schematically shown as P1 and P2. The first web 50A is wound around the first rotating shaft 61, and the second web 50B is wound around the second rotating shaft 62. By the rotation of the first rotation shaft 61, the first web 50A, which has completed primary printing, is sent out in the moving direction, and by the rotation of the second rotation shaft 62, the second web 50B, which has completed primary printing, is It is transmitted in the direction of movement.

Figure 4(a) shows the printing device 10 when performing paper joining from the first web 50A to the second web 50B. The first web 50A fed from the first rotating shaft 61 and the second web 50B fed from the second rotating shaft 62 are joined at the paper joint position RC as the joint insertion position. Then, a cutting portion 63 such as a cutter provided at the front end (left side in FIG. 4) of the paper joint position RC cuts only the first web 50A. As a result, the web 50 as a printed object of the printing device 10 excludes a short section where the first web 50A and the second web 50B overlap just before and after the paper joint position RC. And, at the rear end (right side in FIG. 4) than the paper joint position (RC), it consists only of the first web (50A), and at the front end (left side in FIG. 4) before the paper joint position (RC) is the second web (50A). It consists of only 50B).

Here, if an error occurs in the relative positions of the first web (50A) and the second web (50B) on which the first printing of the new and old has been completed during paper splicing, the second web (50B) after paper splicing is correctly printed. cannot be carried out. For example, as shown in Figure 4 (a), in the overlapping section of the first web 50A and the second web 50B immediately behind the paper joint position RC, the first web 50A The positions of the primary printing design (P1') and the primary printing design (P2') of the second web 50B should be aligned, but there are cases where they are misaligned along the moving direction due to the influence of external disturbances, etc. . Since the plate 13 of each printing unit 11 of the printing device 10 is measured and controlled with respect to the first web 50A before paper splicing, in this state, the plate 13 is measured and controlled with respect to the second web 50B after paper splicing. If secondary printing is performed, the design of the secondary printing will deviate from the design of the primary printing.

Specifically, in Figure 4 (a), the phase (rotation angle) of the plate 13 is such that the secondary printing design (P3) is printed overlapping the primary printing design (P1) of the first web 50A. Because this is controlled, in this state, the secondary print is not at the position of the primary print design (P2) of the second web 50B, but at the position of the primary print design (P1) of the first web 50A before paper splicing. The printing pattern (P3) is printed. For example, in the overlapping section of the first web 50A and the second web 50B immediately after the paper joint position RC, the first printing design P2' of the second web 50B is not used. 1 The secondary printing design (P3) of the plate 13 is overlapped and printed on the primary printing design (P1') of the web 50A. As will be explained below, according to the print control device 4 of this embodiment, secondary printing can be correctly performed on the second web 50B after paper joining.

The seam insertion error detection unit 40 of the printing control device 4 uses the first mark position detection unit 41 to mark first marks printed at predetermined intervals along the moving direction on the first web 50A during primary printing. The position of the mark relative to the paper joint position (RC) is detected, and the second mark is printed at predetermined intervals along the moving direction on the second web 50B during the first printing by the second mark position detection unit 42. The position of the paper joint position (RC) is detected, and the position of the first mark detected by the first mark position detection unit 41 and the second mark position detection unit 42 are determined by the joint insertion error calculation unit 43. Based on the difference in the position of the detected second mark, the paper joint error as the joint insertion error is calculated. Here, the reference mark 52 described in Fig. 2 is suitable as the first mark printed on the first web 50A and the second mark printed on the second web 50B. As described above, the reference mark 52 is placed on the outer periphery of the first plate 13A by the mark printing unit 15 of the first printing unit 11A, which prints the first color in the first printing. It is printed on the first web 50A and the second web 50B at corresponding predetermined intervals.

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 spacing, etc. of the reference mark 52 as the first mark printed on the first web 50A during primary printing. In the example of Figure 4 (a), a sensor capable of measuring the reference mark 52 moving between the paper joint position RC and the rear measuring roll 64 is provided as the mark detection unit 411. As described above, the reference mark 52 is printed outside the band-shaped area 51 (FIG. 2), and since no other design or information is printed in the band-shaped area including it, a mark detection unit that detects the reference mark 52 In (411), there is no need to limit the detectable time zone by a gate like in the mark sensors 23B to 23D.

The first movement amount detection unit 412 detects the movement amount of the first web 50A. The first movement amount detection unit 412 includes an encoder and a phase detector that detect the rotation angle (phase) of any rotating member including the first rotating shaft 61 or the plate 13 that conveys the first web 50A, It can be configured by a rotation position detector, etc., but in the example of FIG. 4, it is configured by an encoder that detects the rotation angle of the measuring roll 64. The first mark position calculation unit 413 is based on the spacing of the reference mark 52 as the first mark 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. Based on this, the position of the first mark with respect to the paper joint position (RC) is calculated. For example, the first mark position calculation unit 413 determines the first mark for the paper seam position RC based on the movement amount of the first web 50A after the mark detection unit 411 detects the first mark. The position of the reference mark 52 printed together with the first printing design P1' at any time can be calculated.

The second mark position detection unit 42 includes a rotation angle memory unit 421, a second movement amount detection unit 422, and a second mark position calculation unit 423. The rotation angle memory unit 421 stores the position of at least one second mark (for example, the reference mark 52 printed with the primary printing design (P2')) and the rotation angle of the second rotation axis 62. I remember it as (phase).

The second movement amount detection unit 422 detects the movement amount of the second web 50B. The second movement amount detection unit 422 includes an encoder and a phase detector that detect the rotation angle (phase) of any rotating member including the second rotation shaft 62 or the plate 13 that conveys the second web 50B, Although it can be configured by a rotational position detector, etc., in the example of FIG. 4, it is configured by an encoder that detects the rotation angle of the measuring roll 64 in the same way as the first movement amount detector 412. The second mark position calculation unit 423 is based on the rotational position of the second mark stored by the rotation angle memory unit 421 and the movement amount of the second web 50B detected by the second movement amount detection unit 422, Calculate the position of the second mark with respect to the paper joint position (RC). For example, the second mark position calculation unit 423 determines the paper joint position (RC) based on the movement amount of the second web 50B from the rotation position of the second mark stored by the rotation angle memory unit 421. The position of the second mark (for example, the reference mark 52 printed with the first printing design P2') at any time can be calculated.

The joint insertion error calculation unit 43 is configured to determine the position of the first mark (e.g., the reference mark 52 printed with the primary printing design (P1')) detected by the first mark position detection unit 41, and the first mark position detection unit 41. 2 Based on the difference in the position of the second mark (e.g., the reference mark 52 printed together with the first printing design (P2')) detected by the mark position detection unit 42, the first web in secondary printing With respect to (50A), the paper joint error as the joint insertion error when inserting the second web 50B is calculated. However, the joint insertion error detection unit 40 is installed together with the primary printing design (P1') in the overlapping section of the first web (50A) and the second web (50B) immediately behind the paper joint position (RC). It may be configured by a sensor that can directly detect the difference in position between the reference mark 52 as a printed first mark and the reference mark 52 as a second mark printed together with the primary printing design P2'.

The rotation angle correction unit 44 adjusts the rotation angle (phase) of the plate 13 when secondary printing is performed on the second web 50B to the joint insertion error detected by the joint insertion error detection unit 40. Based on this, it is corrected by the drive motor (19). As shown in Figure 4(b) after a certain period of time has elapsed from the paper joining performed in Figure 4(a), the printing device 10 performs secondary printing on the second web 50B after paper joining. Since the phase of the plate 13 is corrected, the secondary printing design (P3) of the plate 13 is not the primary printing design (P1') of the first web 50A, but the second web 50B. It is printed correctly so that it overlaps the first printing design (P2).

Above, the present invention has been explained based on the embodiments. Various modifications are possible for the combination of each component or each process in the exemplary embodiment, and it is obvious to those skilled in the art that such modifications are included in the scope of the present invention.

In the embodiment, the web 50, which is a wound paper, is exemplified as the object to be printed, but the printing device 10 can print on any object to be printed. For example, the object to be printed may be a sheet formed of any material, or may be the surface of an object of any shape, such as a container or product.

However, the configuration, action, and function of each device or method described in the embodiments can be realized by hardware resources or software resources, or by cooperation between hardware resources and software resources. As hardware resources, for example, processors, ROM, RAM, and various integrated circuits can be used. As software resources, for example, programs such as operating systems and applications can be used.

4 Printing control device
10 Printing device
11 Printing unit
13 Pandong
15 Mark printing department
19 Drive motor
21 encoder
23 Mark sensor
30 Scale control device
40 Joint insertion error detection unit
41 1st mark position detection unit
42 2nd mark position detection unit
43 Joint insertion error calculation unit
44 Rotation angle correction unit
50 web
50A first web
50B 2nd web
51 Belt area
52 standard mark
53 Register mark
61 First rotation axis
62 Second rotation axis
63 cutting part
411 Mark detection unit
412 First movement amount detection unit
413 1st mark position calculation unit
421 Rotation angle memory
422 Second movement amount detection unit
423 2nd mark position calculation unit
T1 first photodetection element
T2 second photodetection element

Claims (6)

A printing control device for a printing device including a rotatable plate that performs secondary printing on a moving object on which primary printing has been performed,
a seam insertion error detection unit that detects a seam insertion error when inserting a second printed matter into the first printed matter undergoing secondary printing;
A printing control device comprising a rotation angle correction unit that corrects the rotation angle of the plate when secondary printing is performed on the second printing object based on the joint insertion error. According to paragraph 1,
The joint insertion error detection unit,
a mark detection unit that detects first marks printed on the first printed object at predetermined intervals along a moving direction during the first printing;
a first movement amount detection unit that detects a movement amount of the first printed object;
A first mark position calculation unit that calculates the position of the first mark with respect to the joint insertion position where the second printed matter is subsequently inserted, based on the detected first mark and the detected movement amount,
A second mark position detection unit that detects the position of the second mark printed on the second printed matter at predetermined intervals along the moving direction during the first printing with respect to the seam insertion position;
A joint insertion error calculation unit that calculates the joint insertion error based on the 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 printing control device provided. According to paragraph 2,
The second mark position detection unit,
a rotation angle memory unit that stores the position of at least one second mark as a rotation angle of a rotation axis that sends out the wound second printed matter in a moving direction;
a second movement amount detection unit that detects a movement amount of the second object to be printed;
A printing control device comprising a second mark position calculation unit that calculates the position of the second mark with respect to the joint insertion position based on the stored rotation angle and the detected movement amount. According to any one of claims 1 to 3,
The first printed object and the second printed object are paper, and the seam insertion error is a paper seam error. A printing control method of a printing device including a rotatable plate that performs secondary printing on a moving object on which primary printing has been performed, comprising:
A seam insertion error detection step for detecting a seam insertion error when inserting a second printed matter into the first printed matter undergoing secondary printing;
A printing control method comprising a rotation angle correction step for correcting the rotation angle of the plate when performing secondary printing on the second printing object based on the seam insertion error. A computer-readable recording medium recording a printing control program of a printing device including a rotatable plate that performs secondary printing on a moving object on which primary printing has been performed,
A seam insertion error detection step for detecting a seam insertion error when inserting a second printed matter into the first printed matter undergoing secondary printing;
A computer-readable recording medium recording a printing control program that causes the computer to execute a rotation angle correction step for correcting the rotation angle of the plate when secondary printing is performed on the second printing object based on the joint insertion error.