JP2017222139A - Printer registration control device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer registration control device capable of effectively reducing printing losses by shortening registration work time.SOLUTION: A correction amount calculation unit 62 of a registration control device 1 specifies, from an image imaged by an imaging unit 50, a registration mark of the control start time used by a correction amount calculation unit 22 for calculating a deviation amount and a correction amount of a registration mark printed by a cylinder plate among registration marks continuously sequentially detected by a detection unit 10, and calculates a correction amount on the basis of the deviation amount of the registration mark in the specified image from a target value and a deviation amount from the target value calculated for the registration mark by the correction amount calculation unit 22. A registration adjustment unit 21 adjusts the printing position of the registration mark based on the correction amount calculated by the correction amount calculation unit 62 simultaneously with adjustment based on the correction amount calculated by the correction amount calculation unit 22 with respect to the printing position of the registration mark printed by the cylinder plate when the correction amount is calculated by the correction amount calculation unit 62.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a registration control apparatus and method for a printing press.

  For example, in a multi-color gravure printing machine, the initial coarse adjustment for the phase of a plurality of plate cylinders is performed by a preset system, and then the web position and the like are automatically adjusted by feedback control by a register control device. , Registration is to be done. The preset system performs, for example, rough adjustment using the conditions at the time of the previous printing, and the registration control device detects, for example, a registration mark printed on the web being conveyed by an optical sensor and detects the position of the web. To be adjusted. In general, a relatively inexpensive sensor such as a sensor having a light emitting element and a light receiving element is used as an optical sensor in the register control device.

  The above-described registration may not be performed with sufficient accuracy due to the detection accuracy of the optical sensor and the point that the printing state of the registration mark is likely to be unstable particularly in gravure printing. Therefore, in some cases, the operator visually confirms the accuracy during printing and finely adjusts the control amount of the register control device so that the registration is performed with a desired accuracy.

  Various techniques for correcting the control amount of the register control device have been proposed. For example, Patent Document 1 discloses an imaging unit that images a registration mark group on the web in which the first and last two color registration marks are reference color registration marks, and two reference points in a still image captured by the imaging unit. Detection position calculation means for calculating a detection position in each of the other color registration marks with reference to the color mark, target position calculation means for calculating a registration target position in each of the other color registration marks in the reference, and detection position and target position And a correction amount calculating means for calculating a registration correction amount from the deviation from the above.

JP 2005-131895 A

  By the way, the registration fine adjustment device disclosed in Patent Document 1 adjusts the position of the web by feeding back the correction amount calculated based on the captured image after the adjustment by the registration control device already installed in the printing press is completed. Is configured to do. Therefore, since the registration mark printed after the completion of the adjustment by the existing registration control device arrives at the imaging area of the imaging means and the calculation of the imaging and correction amount is performed, the time until shifting to the fine adjustment Due to this, the registration work time becomes long, and there is a possibility that a lot of printing loss occurs. In addition, although it is described that a plurality of image pickup units are installed, in this case, there is a disadvantage that the apparatus cost increases.

  The present invention has been made in consideration of the above circumstances, and an object thereof is to provide a registration control device and method for a printing press that can effectively reduce a printing loss by suppressing a registration work time. And

The present invention is a registration control device for a printing press comprising a plurality of printing units having a printing cylinder for printing a pattern and / or characters on a continuously conveyed web and printing a registration mark on the web,
A detection unit that is provided downstream of the printing cylinder of the second and subsequent printing units of the plurality of printing units and detects a position of a registration mark printed by the upstream printing cylinder;
Based on the position of the registration mark detected by the detection unit, the amount of deviation from the target position of the registration mark printed by the plate cylinder of the second and subsequent printing units is calculated, and the second and subsequent printing is performed. A correction amount calculation unit that calculates the correction amount of the printing position of the registration mark printed by the plate cylinder of the unit;
Based on the correction amount calculated by the correction amount calculation unit, a register adjustment unit that adjusts the printing position of the registration mark printed by the plate cylinder of the second and subsequent printing units;
An imaging unit that is provided downstream of the printing cylinder of the final printing unit of the plurality of printing units and that can capture an image of a registration mark printed by the upstream printing cylinder;
Correction for calculating the correction amount of the printing position of the register mark printed by the plate cylinder of the second and subsequent printing units based on the image of the register mark printed by the upstream plate cylinder imaged by the imaging unit A quantity calculation unit;
With
The correction amount calculation unit includes a shift amount of a registration mark printed by a plate cylinder of the printing unit of the second and subsequent stages, in the correction amount calculation unit among the registration marks detected sequentially and sequentially by the detection unit, and The registration mark used when calculating the correction amount is identified from the image captured by the imaging unit, the amount of deviation from the target position of the registration mark in the identified image, and the correction amount with respect to the registration mark Based on the amount of deviation from the target position calculated by the calculation unit, the correction amount is calculated,
When the correction amount is calculated by the correction amount calculation unit, the registration adjustment unit calculates the correction calculated by the correction amount calculation unit with respect to the printing position of the registration mark printed by the plate cylinder of the second and subsequent printing units. In parallel with the adjustment based on the amount, the registration control device of the printing press is characterized in that the printing position of the registration mark is adjusted based on the correction amount calculated by the correction amount calculation unit.

Further, the present invention is a register control device for a printing press comprising a plurality of printing units for printing a pattern and / or characters on a continuously conveyed web,
A detection unit that is provided downstream of the plate cylinder of the second and subsequent printing units and detects the position of the registration mark;
A correction amount calculation unit that calculates a correction amount of a printing position of a printing unit that has printed the second registration mark from the first registration mark and the second registration mark that are detected by the detection unit;
A register adjusting unit that adjusts a printing position of a printing unit that has printed the second register mark based on the correction amount;
An imaging unit provided downstream of the plate cylinder of the final printing unit;
A correction amount calculation unit that calculates a correction amount of a printing position from the image including the first registration mark serving as the reference and the second registration mark imaged by the imaging unit, and the correction amount;
The registration adjusting unit adjusts the print position of the printing unit on which the second registration mark is printed based on the correction amount, and further adjusts based on the correction amount. Register control device.

  The registration control device according to the present invention may determine the arrival timing at which the registration mark detected by the detection unit reaches the position imaged by the imaging unit based on the web conveyance speed or at least one printing unit of the plurality of printing units. You may further provide the tracking part calculated based on the size of a plate cylinder, and the distance from the detection position of the said detection part to the imaging position by the said imaging part. The correction amount calculation unit is the register mark used when the correction amount calculation unit calculates a deviation amount and a correction amount, or the first correction amount used when the correction amount calculation unit calculates a correction amount. The register mark and the second register mark may be specified based on the arrival timing calculated by the tracking unit.

  The register control device according to the present invention includes an encoder that detects an accumulated rotational speed of a plate cylinder of at least one printing unit of the plurality of printing units, and the arrival mark is detected by the register mark detected by the detection unit. And the number of rotations of the plate cylinder from the detection position of the image pickup section to the image pickup position of the image pickup section, and the image picked up by the image pickup section and the accumulated rotation speed detected by the encoder at the time of image pickup are linked and recorded. The registration mark detected by the detection unit and the accumulated rotation number detected by the encoder when the registration mark is detected may be linked and recorded.

  The register control apparatus according to the present invention may further include an encoder that detects a rotational speed of a plate cylinder of at least one printing unit of the plurality of printing units. The tracking unit may calculate a web conveyance speed based on a rotation speed of the plate cylinder detected by the encoder.

  The detection unit has a light emitting element and a light receiving element, and detects the position of the registration mark by receiving reflected light of light emitted from the light emitting element to the web with the light receiving element. Also good.

The present invention is a registration control method for a printing press including a plurality of printing units having a printing cylinder for printing a pattern and / or characters on a continuously conveyed web and printing a registration mark on the web,
A detection step of detecting a position of a registration mark printed by an upstream plate cylinder downstream of a plate cylinder of a second or subsequent printing unit of the plurality of printing units;
Based on the position of the registration mark detected by the detection step, the amount of deviation from the target position of the registration mark printed by the plate cylinder of the second and subsequent printing units is calculated, and the printing of the second and subsequent stages is performed. A correction amount calculation step for calculating the correction amount of the printing position of the register mark printed by the plate cylinder of the unit;
A first registration adjustment step of adjusting a printing position of a registration mark printed by a plate cylinder of the second and subsequent printing units based on the correction amount calculated in the correction amount calculation step;
An imaging step of capturing an image of a register mark printed by an upstream plate cylinder downstream of the plate cylinder of the last printing unit of the plurality of printing units;
Correction for calculating the correction amount of the printing position of the registration mark printed by the printing cylinder of the second and subsequent printing units based on the image of the registration mark printed by the upstream printing cylinder imaged in the imaging step A quantity calculation step;
A second register adjusting step of adjusting a printing position of a register mark printed by a plate cylinder of the second and subsequent printing units based on the correction amount calculated by the correction amount calculating step;
With
In the correction amount calculation step, out of the registration marks that are successively detected in the detection step, the shift amount of the registration mark printed by the plate cylinder of the second and subsequent printing units in the correction amount calculation step The registration mark used when calculating the correction amount is specified from the image captured in the imaging step, and the correction amount for the deviation amount from the target position of the registration mark in the specified image and the correction mark is corrected. Based on the amount of deviation from the target position calculated in the amount calculation step, the correction amount is calculated,
In the second register adjustment step, when the correction amount is calculated by the correction amount calculation step, a registration mark based on the correction amount calculated by the correction amount calculation step is concurrently with the first register adjustment step. A registration control method for a printing press, wherein the printing position is adjusted.

  In the registration control method according to the present invention, the arrival timing at which the registration mark detected in the detection step reaches the position imaged in the imaging step is determined based on the web conveyance speed or at least one printing unit of the plurality of printing units. You may further provide the tracking process calculated based on the size of a plate cylinder, and the distance from the detection position in the said detection process to the imaging position in the said imaging process. In the correction amount calculation step, the register mark used when calculating the deviation amount and the correction amount in the correction amount calculation step is specified based on the arrival timing calculated in the tracking step. Also good.

  The printing press is provided with an encoder that detects a rotation speed of a plate cylinder of at least one printing unit of the plurality of printing units. In the tracking step, the rotation speed of the plate cylinder detected by the encoder is set. Based on this, the web conveyance speed may be calculated.

  In the detection step, the position of the registration mark may be detected by receiving reflected light of light emitted from the light emitting element to the web with the light receiving element.

  According to the present invention, it is possible to effectively reduce a printing loss by suppressing a registration work time.

1 is a diagram schematically showing a register control device for a printing press according to an embodiment of the present invention and a gravure printing press to which the control control device is applied. FIG. It is a figure explaining an example of the calculation method of the correction amount by the correction amount calculating part of the register adjustment apparatus shown in FIG. It is a figure explaining an example of the calculation method of the correction amount by the correction amount calculating part of the register adjustment apparatus shown in FIG. 3 is a flowchart for explaining an example of a register control method of the register adjusting apparatus shown in FIG. It is a figure explaining the other example of the calculation method of the correction amount by the correction amount calculating part of the registration adjustment apparatus shown in FIG. It is a figure explaining the other example of the calculation method of the correction amount by the correction amount calculating part of the registration adjustment apparatus shown in FIG. It is a figure which shows the other example of the gravure printing machine with which the registration adjustment apparatus shown in FIG. 1 is applied.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram schematically showing a registration control device 1 according to an embodiment of the present invention and a gravure printing machine 100 to which the registration control device 1 is applied. A gravure printing machine 100 shown in FIG. 1 is a multicolor gravure printing machine, and prints images and / or characters on a web W and a plurality of prints having plate cylinders 101A to 108A that print a register mark on the web W. Units 101U to 108U are provided. As an example, the gravure printing machine 100 according to the present embodiment includes eight printing units 101U to 108U. In the following description, the printing units 101U to 108U may be referred to as first to eighth printing units 101U to 108U in the order in which they are arranged from the upstream side to the downstream side in the conveyance direction of the web W. In the present embodiment, the number of printing units 101U to 108U is eight, but it may be two or more, and the number is not particularly limited.

  In FIG. 1, registration marks M1 to M8 printed on the web W by the plate cylinders 101A to 108A of the first to eighth printing units 101U to 108U are schematically shown. Each time the web W passes through the printing units 101U to 108U, the registration marks are sequentially printed by the plate cylinders 101A to 108A. In this example, the web W has passed through the eighth printing unit 108U at the final stage. Later, eight registration marks M1 to M8 are printed on the web W.

  As shown in FIG. 1, the registration control device 1 according to the present embodiment includes a plurality of detection units 10 provided corresponding to the second and subsequent printing units (second to eighth printing units 102U to 108U). An automatic adjustment unit 20 including a registration adjustment unit 21 and a correction amount calculation unit 22 for adjusting the printing position of the registration mark in response to detection by the detection unit 10 and a rotation speed of the gravure printing machine 100 are detected. Provided downstream of the encoder 30, the tracking unit 40 for calculating the position of the registration mark detected by the detection unit 10, and the plate cylinder of the last printing unit (the printing cylinder 108A of the eighth printing unit 108U). The image capturing unit 50, the image processing unit 61 for processing the image captured by the image capturing unit 50, and calculating the correction amount of the printing position of the registration mark according to the image. A correction amount calculation unit 60 comprising, a display unit 70 for displaying the control status by the register control unit 1, an input unit 80 for inputting information required for control in the register control unit 1, a.

  In the present embodiment, the detection unit 10 is provided downstream of each plate cylinder 102A to 108A corresponding to each plate cylinder 102A to 108A of the second to eighth printing units 102U to 108U. The position of the printed registration mark is detected. Specifically, for example, the detection unit 10 provided downstream of the plate cylinder 102A of the second printing unit 102U is printed on the web W by the plate cylinders 101A and 102A of the first and second printing units 101U and 102U. Registration marks M1 and M2 are detected. Further, for example, the detection unit 10 provided on the downstream side of the plate cylinder 108A of the eighth printing unit 108U has the registration marks M1 printed on the web W by the plate cylinders 101A to 108A of the first to eighth printing units 101U to 108U. M8 is detected.

  As shown in the detection unit 10 provided downstream of the plate cylinder 102A of the second printing unit 102U in FIG. 1, the detection unit 10 in the present embodiment includes a light emitting element 10A and a light receiving element 10B. The position of the registration mark is detected by receiving the reflected light of the light emitted from 10A to the web W by the light receiving element 10B. In the detection unit 10, when the light emitted from the light emitting element 10A to the web W is reflected by the registration mark and received by the light receiving element 10B, the position where the registration mark exists is a pulse-like waveform as shown in FIG. By detecting at Wa1, for example, the distance between adjacent register marks is detected. Here, the detection unit 10 provided downstream of the plate cylinder 102A has been described, but the detection units 10 provided downstream of the other plate cylinders 103A to 108A also include the light emitting element 10A and the light receiving element 10B. Yes.

  The correction amount calculation unit 22 in the automatic adjustment unit 20 is connected to the detection unit 10 provided downstream of each plate cylinder 102A to 108A, and the position of the registration mark detected by each detection unit 10 is input. Then, the correction amount calculation unit 22 targets the registration marks M2 to M8 printed by the plate cylinders 102A to 108A of the second to eighth printing units 102U to 108U based on the positions of the registration marks detected by the detection units 10. The amount of deviation from the position is calculated, and the correction amount of the printing position of the registration marks M2 to M8 printed by the plate cylinders 102A to 108A is calculated.

In FIG. 2, as an example, the position X in the vertical direction of the registration mark M2 printed by the plate cylinder 102A of the second printing unit 102U with respect to the registration mark M1 printed by the plate cylinder 101A of the first printing unit 101U is detected. The state is shown schematically. Correction amount calculation unit 22, the target position X _T register mark M2 for registration marks M1, compared to the detected position X by the detector 10, while calculating the shift amount [Delta] X, in this example, the shift amount ΔX is calculated as a correction amount for the printing position of the registration mark M2 printed by the plate cylinder 102A, and the correction amount calculation unit 22 outputs the correction amount to the registration adjustment unit 21. The correction amount calculation unit 22 is configured to perform the above-described processing on the plate cylinders 103A to 108A of the third to eighth printing units 103U to 108U.

  The registration adjusting unit 21 adjusts the printing positions of the registration marks of the plate cylinders 102A to 108A of the second to eighth printing units 102U to 108U based on the correction amount calculated by the correction amount calculation unit 22. ing. In the present embodiment, the plate cylinders 102A to 108A are individually driven, and the registration adjusting unit 21 is arranged in the phase (position in the rotation direction) and the axial direction of the plate cylinders 102A to 108A. The position can be adjusted individually. More specifically, the register adjusting unit 21 controls the phase of each plate cylinder 102A to 108A by directly adjusting the rotation of each plate cylinder 102A to 108A. Note that the registration adjusting unit 21 may be configured to control the phase of each of the plate cylinders 102A to 108A by controlling the compensator roller provided corresponding to each of the printing units 102U to 108U. Note that the register adjusting unit 21 in the present embodiment is configured as one function unit in a computer that gives a control signal to a motor that drives the plate cylinders 102A to 108A, for example.

  In the automatic adjustment unit 20 according to the present embodiment, the correction amount calculation unit 22 calculates the correction amount in accordance with the detection of the registration marks continuously and sequentially detected by the detection unit 10, and the registration mark detected by the detection unit 10. The registration adjustment unit 21 adjusts the printing position of the registration mark based on the correction amount calculated by the correction amount calculation unit 22 until the deviation amount from the target position value falls within a predetermined range. Here, the above-mentioned predetermined range is a range in which it can be determined that the deviation amount (correction amount) of the registration mark detected by the detection unit 10 from the target position value is sufficiently small.

  Next, in the present embodiment, as shown in FIG. 1, the encoder 30 detects the rotational speed (rotation speed) of the plate cylinder 101A of the first printing unit 101U. The encoder 30 outputs the detected rotational speed of the plate cylinder 101A to the tracking unit 40. In the present embodiment, the encoder 30 detects the rotational speed of the plate cylinder 101A, but the encoder 30 may detect the rotational speed of other plate cylinders, and the number thereof is not particularly limited. The encoder 30 may be configured to detect the rotational speed of a motor that drives the plate cylinder.

  The tracking unit 40 is connected to the automatic adjustment unit 20, the encoder 30, the imaging unit 50, and the correction amount calculation unit 60 in the present embodiment. The information indicating whether or not is detected and the amount of deviation from the target position value are output, and the rotation speed of the plate cylinder 101A is output from the encoder 30. The tracking unit 40 calculates the conveyance speed of the web W based on the rotational speed of the plate cylinder 101 </ b> A detected by the encoder 30, and reaches the position where the registration mark detected by each detection unit 10 is imaged by the imaging unit 50. The arrival timing is calculated. In the present embodiment, the arrival timing is time, and is calculated by dividing the distance from the detection position of each detection unit 10 to the imaging position by the imaging unit 50 by the conveyance speed. Note that such arrival timing is not limited to time, and information indicating the number of times the plate cylinder rotates from the detection position of the detection unit 10 to the imaging position of the imaging unit 50 by the detected registration mark. But you can. The tracking unit 40 according to the present embodiment outputs the arrival timing of the registration mark detected by the detection unit 10 to the imaging unit 50, and the correction amount calculation unit 60 notifies the arrival timing of the registration mark and the target position of the registration mark. The amount of deviation from the value is output.

  As shown in FIG. 1, the imaging unit 50 according to the present embodiment is provided downstream of the plate cylinder 108A of the eighth printing unit 108U, and is registered by the upstream plate cylinder (plate cylinders 101A to 108A). A mark image can be captured. Here, the imaging unit 50 is configured to output the arrival timing of the registration mark detected by each detection unit 10 from the tracking unit 40 as described above, and performs imaging according to the output arrival timing. By performing, the registration mark detected by each detection unit 10 is imaged. The imaging unit 50 according to the present embodiment captures an image of a register mark as a still image, and outputs the captured image to the image processing unit 61 in the correction amount calculation unit 60. The imaging unit 50 is set under installation conditions that provide a field of view in which at least two adjacent registration marks can be accommodated in one still image with a resolution capable of obtaining desired accuracy. When only two adjacent registration marks are included in the image, the imaging unit 50 captures a still image seven times in succession. However, by increasing the number of registration marks that can be captured in the captured still image, the number of imaging required for one measurement can be reduced. Therefore, the imaging range of the imaging unit 50 is set wide so that three or more registration marks can be accommodated. May be.

  Then, the image processing unit 61 in the correction amount calculation unit 60 uses the registration mark target printed by the plate cylinders 102A to 108A of the second to eighth printing units 102U to 108U from the image of the registration mark imaged by the imaging unit 50. The amount of deviation from the position value is calculated and output to the correction amount calculation unit 62. Then, the correction amount calculation unit 62 uses the second to eighth printing units 102U based on the image of the registration mark imaged by the imaging unit 50 (specifically, the amount of deviation from the target position value of the registration mark in the image). The correction amounts of the printing positions of the registration marks M1 to M8 printed by the plate cylinders 102A to 108A of .about.108U are calculated.

  Here, in the correction amount calculation unit 62 in the present embodiment, the above-described correction amount calculation unit 22 among the registration marks detected successively and sequentially by each detection unit 10 is the second to eighth printing units 102U to 108U. The registration marks M2 to M8 at the start of the control used when the shift amounts and the correction amounts of the registration marks M2 to M8 printed by the plate cylinders 102A to 108A are first calculated, and intermittently printed thereafter. The registration marks M2 to M8 are specified from the image captured by the imaging unit 50. Then, the correction amount calculation unit 62 is based on the deviation amount from the target position value of the registration mark in the specified image and the deviation amount from the target position value calculated by the correction amount calculation unit 22 with respect to the registration mark. The correction amount is calculated.

  The registration marks M2 to M8 at the start of the control described above are the deviation amounts of the registration marks M2 to M8 printed by the correction cylinders 22A to 108A of the second to eighth printing units 102U to 108U. The correction amount is calculated first, and indicates the registration marks M2 to M8 before the adjustment by the registration adjusting unit 21 based on the correction amount. Further, the above-described “registration marks M2 to M8 printed intermittently after the registration marks M2 to M8 at the start of control” are the registration mark printing positions based on the correction amount from the correction amount calculation unit 62 by the registration adjustment unit 21. Each of the plate cylinders 102A to 108A of the second to eighth printing units 102U to 108U for which the adjustment has been performed refers to a register mark to be printed immediately after the adjustment. Here, the image processing unit 61 and the correction amount calculation unit 62 in the correction amount calculation unit 60 are configured to use the registration marks M2 to M8 at the start of control and the registration marks M2 to M8 that are intermittently printed thereafter as tracking units. It is possible to specify by using the arrival timing from 40. Specifically, the correction amount calculation unit 62 records the image captured by the imaging unit 50 at a predetermined arrival timing and the arrival timing, and records the arrival timing of the registration mark output from the tracking unit 40 and the arrival timing. Record the amount of deviation of the registration mark from the target position value. Thereby, the image corresponding to the desired registration mark detected by the detection unit 10 can be specified using the arrival timing.

In FIG. 3, the position Y in the vertical direction of the registration mark M2 printed by the plate cylinder 102A of the second printing unit 102U with respect to the registration mark M1 printed by the plate cylinder 101A of the first printing unit 101U is the image processing unit 61. The state specified from the image is schematically shown. To explain the processing in the correcting amount calculating unit 60 with reference to FIG. 3, first, in the present embodiment, the image processing unit 61, the target position X _T register mark M2 for registration marks M1, identified in the image Compared with the position Y, a deviation amount ΔY is calculated, and this deviation amount ΔY is output to the correction amount calculation unit 62. In this example, the correction amount calculation unit 62 calculates the correction amount ΔZ by subtracting the deviation amount ΔX calculated by the correction amount calculation unit 22 from the deviation amount ΔY. The correction amount calculating unit 62 is configured to perform the above-described processing on the plate cylinders 103A to 108A of the third to eighth printing units 103U to 108U. In the example shown in FIGS. 2 and 3, the register mark M1 corresponds to the first register mark as a reference in the present invention, and the register mark M2 corresponds to the second register mark in the present invention. ing.

  In the present embodiment, the correction amount calculated by the correction amount calculation unit 62 is output to the register adjustment unit 21 immediately after the calculation. At this time, the register adjusting unit 21 in the present embodiment is calculated by the correction amount calculating unit 22 for the printing positions of the register marks M2 to M8 printed by the plate cylinders 102A to 108A of the second to eighth printing units 102U to 108U. In parallel with the adjustment based on the correction amount, the printing positions of the register marks M2 to M8 are adjusted based on the correction amount.

  In the present embodiment, the processing of the image processing unit 61 and the correction amount calculation unit 62 in the correction amount calculation unit 60 is performed until the correction amount calculated by the correction amount calculation unit 62 falls within a predetermined allowable range. The processing of the image processing unit 61 and the correction amount calculation unit 62 determines that the amount of deviation from the target position of the registration mark detected by the detection unit 10 in the automatic adjustment unit 20 is within a predetermined range, and sets the correction amount. Even when the adjustment of the printing position of the registration mark based on the stop is stopped, the adjustment is performed until the correction amount falls within a predetermined allowable range.

  In addition, the display unit 70 in the present embodiment displays the operation status of the register control device 1, the control status of the shift amount of the register mark, and the like. The input unit 80 is provided for the operator to input the number of printing units to be used, the width of the original fabric, the size of the plate cylinder, the registration mark setting, and the like as settings necessary for the operation of the registration control device 1. . The size of the plate cylinder means the circumference of the plate cylinder, the radius, and the like. In addition, when each data is hold | maintained at the gravure printing machine 100 side, these each data may be automatically input from the gravure printing machine 100 side.

  Next, an example of the control flow of the register control device 1 in the present embodiment will be described with reference to the flowchart of FIG.

  The processing of the registration control device 1 in the present embodiment is started when the gravure printing machine 100 is driven and the start of adjustment processing by the automatic adjustment unit 20 is instructed by the operator. When the adjustment process by the automatic adjustment unit 20 is started, first, in step S1, each detection unit 10 is printed by the plate cylinders 102A to 108A of the second to eighth printing units 102U to 108U located upstream thereof. One or more positions of the registration marks M2 to M8 are detected (detection step).

  Next, in step S2, the correction amount calculation unit 22 prints the plate cylinders 102A to 108A of the second to eighth printing units 102U to 108U based on the positions of the registration marks M2 to M8 output from the detection units 10. The deviation amounts of the registered marks M2 to M8 from the target position are calculated, and the correction amounts of the printing positions of the registration marks M2 to M8 printed by the plate cylinders 102A to 108A are calculated (correction amount calculation step).

  Next, in step S3, the registration adjustment unit 21 corrects the printing positions of the registration marks M2 to M8 printed by the plate cylinders 102A to 108A of the second to eighth printing units 102U to 108U output from the correction amount calculation unit 22. Based on the amount, the printing positions of the registration marks of the plate cylinders 102A to 108A are adjusted (first registration adjustment step). Thereafter, the registration marks M1 to M8 printed by the plate cylinders 101A to 108A are sequentially imaged by the imaging unit 50 (imaging process).

  Here, the registration control device 1 according to the present embodiment determines whether or not the predetermined registration mark is imaged by the imaging unit 50 in step S4. If the predetermined registration mark is not captured, step S1 is performed. The processing is returned to and the adjustment based on the correction amount is repeated. On the other hand, if the registration control device 1 determines that a predetermined registration mark has been imaged, the process proceeds to step S5. The above-mentioned predetermined registration marks mean the above-described registration marks M2 to M8 at the start of control and the registration marks M2 to M8 that are intermittently printed thereafter.

  In step S5, the correction amount calculation unit 62 corrects the printing position of the registration mark printed by the plate cylinders 102A to 108A of the second to eighth printing units 102U to 108U based on the image of the predetermined registration mark. The amount is calculated (correction amount calculation step).

  Next, in step S6, it is determined whether or not the correction amount calculated by the correction amount calculator 62 is within the allowable range. If the correction amount is not within the allowable range, the process proceeds to step S7, where the correction amount is within the allowable range. If there is, the process ends.

  In step S7, the registration adjusting unit 21 adjusts the printing positions of the registration marks of the plate cylinders 102A to 108A of the second to eighth printing units 102U to 108U based on the correction amount calculated by the correction amount calculation unit 62. (Second register adjustment step). Here, in the present embodiment, the adjustment based on the correction amount by the register adjusting unit 21 is performed in parallel with the first register adjusting step (step S3) as shown in FIG. In other words, in the present embodiment, the registration adjustment unit 21 calculates the correction amount calculation unit 62 without waiting for the deviation amount of the registration mark detected by the detection unit 10 from the target position value to fall within a predetermined range. The configuration is such that adjustment based on the corrected amount can be performed. After the adjustment of the register adjusting unit 21 based on the correction amount calculated by the correction amount calculating unit 62, the process returns to step S1.

  According to the registration control device 1 according to the present embodiment described above, the correction amount calculation is performed without waiting for the deviation amount of the registration mark detected by the detection unit 10 from the target position value to be within the predetermined range. Adjustment based on the correction amount calculated by the unit 62 is performed. This is compared with the case where the adjustment based on the correction amount calculated by the correction amount calculation unit 62 is performed after the deviation amount from the target position value of the registration mark detected by the detection unit 10 falls within a predetermined range. This makes it possible to complete the registration work time early. As a result, it is possible to effectively reduce the printing loss by suppressing the registration work time.

  Further, in the present embodiment, the tracking unit 40 calculates the arrival timing at which the registration mark detected by the detection unit 10 reaches the position where the registration mark is imaged by the imaging unit 50 based on the conveyance speed of the web W. Yes. Then, the correction amount calculation unit 62 specifies the registration mark at the start of control and the registration mark that is intermittently printed thereafter based on the arrival timing calculated by the tracking unit 40. Here, since the tracking unit 40 calculates the conveyance speed of the web W based on the rotational speed of the plate cylinder detected by the encoder 30, it can calculate the conveyance speed of the web W with a simple configuration and a predetermined registration mark. Can be identified.

  Further, each of the registration marks that are intermittently printed after the registration mark at the start of control, which is specified by the correction amount calculation unit 62, is registered by the registration adjustment unit 21 based on the correction amount from the correction amount calculation unit 62. The plate cylinders 102A to 108A of the second to eighth printing units 102U to 108U in the second and subsequent stages where the mark printing position has been adjusted are register marks to be printed immediately after the adjustment. Thereby, the adjustment based on the correction amount by the register adjusting unit 21 is performed at an appropriate timing. In other words, the adjustment based on the correction amount by the register adjustment unit 21 is not unnecessarily duplicated. Accordingly, it is possible to prevent the shift amount from becoming unstable due to the adjustment based on the correction amount by the register adjustment unit 21.

  Although the embodiments of the present invention have been described above, the present invention can be variously modified without being limited to the above-described embodiments. For example, in the above-described embodiment, the register control device 1 according to the embodiment of the present invention is applied to the gravure printing machine 100. However, the register control device of the present invention is also applicable to an offset printing machine.

  In the above-described embodiment, the example in which the register adjustment unit 21 adjusts the vertical shift amount of the register mark has been described. However, the register adjustment unit 21 has a horizontal shift amount of the register mark along with the vertical shift amount of the register mark. You may adjust the deviation | shift amount of a direction. The register adjusting unit 21 can adjust the lateral shift amount of the register mark by moving the corresponding plate cylinder in the axial direction. Hereinafter, an example of processing in the case where the registration adjusting unit 21 adjusts the shift amount of the registration mark in the horizontal direction will be described.

  FIG. 5 is a diagram for explaining an example of a method for calculating the correction amount in the horizontal direction of the registration mark by the correction amount calculation unit 22, and FIG. 6 illustrates the calculation of the correction amount in the horizontal direction of the registration mark by the correction amount calculation unit 62. It is a figure explaining the example of a method. For example, as shown in FIG. 5, when one side extending in the lateral direction of the registration mark is inclined, the detection unit 10 emits light emitted from the light emitting element 10A to the web W at a predetermined position TL in the lateral direction. When the light is reflected by M2 and received by the light receiving element 10B, the position where the registration marks M1 and M2 are present is detected by the pulsed waveform Wa2. Here, if the lateral positions of the registration mark M1 and the registration mark M2 that are adjacent in the vertical direction are shifted, the widths of the two waveforms Wa2 are detected differently as indicated by L1 and L2 in FIG. . In such a case, the correction amount calculation unit 22 can calculate the lateral displacement amount ΔH1 of the registration mark M2 with respect to the registration mark M1, and can calculate the displacement amount ΔH1 as the lateral correction amount of the printing position. it can. For example, the registration adjusting unit 21 may adjust the lateral shift amount of the registration mark based on the lateral correction amount calculated in this way.

  As shown in FIG. 6, the image processing unit 61 can calculate a lateral shift amount ΔH2 of the registration mark M2 with respect to the register mark M1 from the captured image, and the correction amount calculation unit 62 can calculate the shift amount ΔH2. The correction amount ΔH can be calculated by subtracting the deviation amount ΔH1 calculated by the correction amount calculation unit 22 from. For example, the registration adjusting unit 21 may adjust the lateral shift amount of the registration mark based on the lateral correction amount calculated in this way.

  Further, in the above-described embodiment, the plate cylinders 102A to 108A are individually driven, and the registration adjusting unit 21 sets the phases of the plate cylinders 102A to 108A to the plate cylinders 102A to 108A. Is controlled by directly adjusting the rotation of the. However, instead of this, a configuration may be adopted in which the phase of each of the plate cylinders 102A to 108A is controlled by controlling the compensator roller provided corresponding to each of the printing units 102U to 108U. FIG. 7 shows a gravure printing machine equipped with a compensator roller. In FIG. 7, a second printing unit 102U including a compensator roller 202A is shown. As shown in FIG. 7, the compensator roller 202A is disposed on the upstream side of the plate cylinder 102A, and can move up and down to control the phase of the plate cylinder 102A with respect to the web W.

  In the above-described embodiment, an example in which the arrival timing calculated by the tracking unit 40 is time has been described. However, the arrival timing is determined by the imaging unit 50 imaging the detected registration mark from the detection position of the detection unit 10. It may be the number of times the plate cylinder rotates before reaching the position. In this case, it is preferable that the register control device 1 includes an encoder that detects the integrated rotational speed of the plate cylinder of at least one printing unit of the plurality of printing units 102U to 108U. The register control device 1 records the image captured by the image capturing unit 50 and the accumulated number of rotations detected by the encoder at the time of image capturing, and records the register mark detected by the detecting unit 10 and the register mark. It is preferable that the accumulated rotational speed detected by the encoder is linked and recorded. In such a configuration, it is confirmed that the value obtained by subtracting the accumulated rotation number associated with the register mark detected by the detection unit 10 from the accumulated rotation number associated with the image is the number of times as the arrival timing. By doing so, it is possible to specify an image corresponding to a desired registration mark detected by the detection unit 10. The accumulated rotation number means the number of times the plate cylinder accumulated from a reference value (for example, 0) has been rotated.

DESCRIPTION OF SYMBOLS 1 ... Registration control apparatus 10 ... Detection part 20 ... Automatic adjustment unit 21 ... Registration adjustment part 22 ... Correction amount calculating part 30 ... Encoder 40 ... Tracking part 50 ... Imaging part 60 ... Correction amount calculating unit 61 ... Image processing part 62 ... Correction Quantity calculation unit 70 ... display unit 80 ... input unit 100 ... gravure printing machines 101U to 108U ... printing units 101A to 108A ... plate cylinder 202A ... compensator roller W ... webs M1 to M8 ... register marks

Claims (10)

A registration control device for a printing press comprising a plurality of printing units each having a printing cylinder for printing a pattern and / or characters on a continuously conveyed web and printing a registration mark on the web,
A detection unit that is provided downstream of the printing cylinder of the second and subsequent printing units of the plurality of printing units and detects a position of a registration mark printed by the upstream printing cylinder;
Based on the position of the registration mark detected by the detection unit, the amount of deviation from the target position of the registration mark printed by the plate cylinder of the second and subsequent printing units is calculated, and the second and subsequent printing is performed. A correction amount calculation unit that calculates the correction amount of the printing position of the registration mark printed by the plate cylinder of the unit;
Based on the correction amount calculated by the correction amount calculation unit, a register adjustment unit that adjusts the printing position of the registration mark printed by the plate cylinder of the second and subsequent printing units;
An imaging unit that is provided downstream of the printing cylinder of the final printing unit of the plurality of printing units and that can capture an image of a registration mark printed by the upstream printing cylinder;
Correction for calculating the correction amount of the printing position of the register mark printed by the plate cylinder of the second and subsequent printing units based on the image of the register mark printed by the upstream plate cylinder imaged by the imaging unit A quantity calculation unit;
With
The correction amount calculation unit includes a shift amount of a registration mark printed by a plate cylinder of the printing unit of the second and subsequent stages, in the correction amount calculation unit among the registration marks detected sequentially and sequentially by the detection unit, and The registration mark used when calculating the correction amount is identified from the image captured by the imaging unit, the amount of deviation from the target position of the registration mark in the identified image, and the correction amount with respect to the registration mark Based on the amount of deviation from the target position calculated by the calculation unit, the correction amount is calculated,
When the correction amount is calculated by the correction amount calculation unit, the registration adjustment unit calculates the correction calculated by the correction amount calculation unit with respect to the printing position of the registration mark printed by the plate cylinder of the second and subsequent printing units. In parallel with the adjustment based on the amount, the registration control device for the printing press is configured to adjust the printing position of the registration mark based on the correction amount calculated by the correction amount calculation unit. A registration control device for a printing press comprising a plurality of printing units for printing pictures and / or characters on a continuously conveyed web,
A detection unit that is provided downstream of the plate cylinder of the second and subsequent printing units and detects the position of the registration mark;
A correction amount calculation unit that calculates a correction amount of a printing position of a printing unit that has printed the second registration mark from the first registration mark and the second registration mark that are detected by the detection unit;
A register adjusting unit that adjusts a printing position of a printing unit that has printed the second register mark based on the correction amount;
An imaging unit provided downstream of the plate cylinder of the final printing unit;
A correction amount calculation unit that calculates a correction amount of a printing position from the image including the first registration mark serving as the reference and the second registration mark imaged by the imaging unit, and the correction amount;
The registration adjusting unit adjusts the printing position of the printing unit on which the second registration mark is printed based on the correction amount, and further adjusts based on the correction amount. Register control device. The arrival timing at which the registration mark detected by the detection unit reaches the position imaged by the imaging unit, the web conveyance speed or the size of the plate cylinder of at least one printing unit of the plurality of printing units, and the detection A tracking unit that calculates based on the distance from the detection position of the unit to the imaging position by the imaging unit,
The correction amount calculation unit is the register mark used when the correction amount calculation unit calculates a deviation amount and a correction amount, or the first correction amount used when the correction amount calculation unit calculates a correction amount. The registration control apparatus for a printing press according to claim 1 or 2, wherein the registration mark and the second registration mark are specified based on an arrival timing calculated by the tracking unit. An encoder that detects an accumulated rotational speed of a plate cylinder of at least one printing unit of the plurality of printing units;
The arrival timing is the number of times the plate cylinder rotates until the registration mark detected by the detection unit reaches the imaging position by the imaging unit from the detection position of the detection unit,
The image picked up by the image pickup unit and the accumulated rotation number detected by the encoder at the time of image pickup are linked and recorded, and the register mark detected by the detection unit and the accumulated rotation number detected by the encoder at the time of detecting the register mark are recorded. The registration control device for a printing press according to claim 3, wherein the registration control device is linked and recorded. An encoder that detects a rotational speed of a plate cylinder of at least one printing unit of the plurality of printing units;
The registration control device for a printing press according to claim 3, wherein the tracking unit calculates a web conveyance speed based on a rotation speed of the plate cylinder detected by the encoder.   The detection unit includes a light emitting element and a light receiving element, and detects the position of the registration mark by receiving reflected light of light emitted from the light emitting element to the web with the light receiving element. A register control device for a printing press according to any one of claims 1 to 5. A registration control method for a printing press comprising a plurality of printing units having a printing cylinder for printing a pattern and / or characters on a continuously conveyed web and printing a registration mark on the web,
A detection step of detecting a position of a registration mark printed by an upstream plate cylinder downstream of a plate cylinder of a second or subsequent printing unit of the plurality of printing units;
Based on the position of the registration mark detected by the detection step, the amount of deviation from the target position of the registration mark printed by the plate cylinder of the second and subsequent printing units is calculated, and the printing of the second and subsequent stages is performed. A correction amount calculation step for calculating the correction amount of the printing position of the register mark printed by the plate cylinder of the unit;
A first registration adjustment step of adjusting a printing position of a registration mark printed by a plate cylinder of the second and subsequent printing units based on the correction amount calculated in the correction amount calculation step;
An imaging step of capturing an image of a register mark printed by an upstream plate cylinder downstream of the plate cylinder of the last printing unit of the plurality of printing units;
Correction for calculating the correction amount of the printing position of the registration mark printed by the printing cylinder of the second and subsequent printing units based on the image of the registration mark printed by the upstream printing cylinder imaged in the imaging step A quantity calculation step;
A second register adjusting step of adjusting a printing position of a register mark printed by a plate cylinder of the second and subsequent printing units based on the correction amount calculated by the correction amount calculating step;
With
In the correction amount calculation step, out of the registration marks that are successively detected in the detection step, the shift amount of the registration mark printed by the plate cylinder of the second and subsequent printing units in the correction amount calculation step The registration mark used when calculating the correction amount is specified from the image captured in the imaging step, and the correction amount for the deviation amount from the target position of the registration mark in the specified image and the correction mark is corrected. Based on the amount of deviation from the target position calculated in the amount calculation step, the correction amount is calculated,
In the second register adjustment step, when the correction amount is calculated by the correction amount calculation step, a registration mark based on the correction amount calculated by the correction amount calculation step is concurrently with the first register adjustment step. A registration control method for a printing press, wherein the printing position is adjusted. The arrival timing at which the registration mark detected in the detection step reaches the position imaged in the imaging step is determined based on the web conveyance speed or the size of the plate cylinder of at least one printing unit of the plurality of printing units. A tracking step for calculating based on the distance from the detection position in the step to the imaging position in the imaging step,
In the correction amount calculation step, the register mark used in calculating the deviation amount and the correction amount in the correction amount calculation step is specified based on the arrival timing calculated in the tracking step. The register control method for a printing press according to claim 7. The printer is provided with an encoder that detects a rotational speed of a plate cylinder of at least one printing unit of the plurality of printing units,
The registration control method for a printing press according to claim 8, wherein in the tracking step, a web conveyance speed is calculated based on a rotation speed of the plate cylinder detected by the encoder.   The position of a registration mark is detected in the said detection process by receiving with the light receiving element the reflected light of the light light-emitted from the light emitting element to the web. Registration control method for printing press.

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