JP5042584B2 - Control device for gravure rotary printing press - Google Patents

Description

  A plurality of printing units are arranged along the conveyance path of the printing material, and the printing plate cylinder provided in each printing unit is individually rotated by a driving motor to sequentially print on the printing material. The present invention relates to a gravure rotary printing press configured as described above.

  2. Description of the Related Art Conventionally, a plurality of printing units are disposed along a conveyance path of a printing web (printed material), and printing plate cylinders provided in the respective printing units are individually rotated and driven by a driving motor to the printed material. In a so-called sectional drive gravure rotary printing press configured to perform sequential printing, for example, as shown in Patent Document 1 below, a registration mark printed on a printing web in each printing unit is detected as mark detection means. In addition, the misregistration (print misalignment) is determined based on the detection distance between the register marks, and if it is determined that there is a misregistration, the printing in which the misregistration has occurred is determined according to the misregistration error amount. The drive speed of each printing unit from the unit and the printing unit to the final printing unit on the web winding side is indicated by these marks. The phase correction is performed by maintaining the synchronism between the units and changing with the same operation amount. After the phase correction is completed, the driving speed of each printing unit is returned to the synchronous driving speed, and all the printing units are driven synchronously. ing.

Further, for example, as shown in Patent Document 2 below, a sectional drive gravure printing machine that does not include a compensator roll includes a printing unit driven by at least three stages of motors. A command value is given, and in each of the second and subsequent printing units, a registration error obtained from a printing register detection system and a plate cylinder origin signal detection system attached to the printing substrate (substrate), respectively. In a gravure printing machine provided with a control system for correcting the speed command value based on a position detection value, a plate accompanying registration adjustment of a preceding printing unit between the control systems of each printing unit. Configure and connect the tension variation of the printing substrate due to the phase operation and the corresponding registration error, that is, the plate phase transfer model, The transfer model between be given as a feedforward compensation have been made to the control system of the printing unit of said next stage of its output.
JP-A-10-86343 Japanese Patent Laid-Open No. 2003-237033

  As disclosed in the above-mentioned Patent Document 1, the printing unit in which the misregistration occurs and the driving speed of each printing unit from the printing unit to the printing unit at the final stage on the web winding side, When the phase correction is performed by maintaining the synchronism between the units and changing with the same operation amount, the path between the printing unit in which the misregistration correction is performed and the printing units positioned before and after the printing unit are corrected. If the length is constant, the apparent substrate length between the printing unit on which the above-described misregistration correction is performed and the printing unit located on the rear side is maintained constant. It is possible to temporarily suppress the occurrence of misregistration caused by being performed in the subsequent printing unit.

  However, since the effect of the correction of the misregistration occurs in the printing unit on the rear stage side with a predetermined time difference, the printing unit in which the misregistration occurs as described in Patent Document 1 and the rear stage side are arranged. If the misregistration correction is performed by simultaneously changing the driving speed of the printed printing unit by the same operation amount, the expansion / contraction amount of the printing material expanded / contracted by the correction of the misregistration gradually changes with time. At the same time, it is inevitable that new misregistration will occur between the printing unit in which the above misregistration has occurred and the subsequent printing unit, and these misregistrations will be completely corrected. Had the problem of taking a long time.

  Further, the above-mentioned Patent Document 2 discloses an arithmetic unit having a transmission model of tension variation of a printing substrate due to a plate phase operation accompanying registration adjustment of a preceding printing unit and a corresponding registration error (plate phase), for example, each stage. Inertia moment J of a free roll disposed between the printing units of the second stage, the path length between the printing unit of one stage and the next stage, the path length between the printing unit of the next stage and the next stage, printing An arithmetic unit having a transmission model configured based on a base material speed, a tension conversion constant for displacement, and the like is disposed between the printing units, and the inertia moment J and the tension conversion constant are set appropriately. Thus, there is a disclosure that when a misregistration correction is performed in a specific printing unit, it is possible to effectively prevent the influence from reaching the subsequent printing unit.

  However, since it is not clear how to set the inertia moment J, the tension conversion constant, and the like, the effect of correction of misregistration performed in a specific printing unit reaches the subsequent printing unit. It is doubtful whether this can be effectively prevented. In addition, since it is necessary to dispose a high-performance arithmetic device having a complicated configuration between the printing units, there is a problem that the cost increases.

  The present invention has been made in view of the above points, and in a gravure rotary printing press in which a plurality of printing units are arranged along a conveyance path of a printing material, correction of printing misalignment sequentially applied to the printing material is corrected. It is an object of the present invention to provide a control device for a gravure rotary printing press that can effectively prevent the influence of the influence on a subsequent printing unit with a simple configuration.

  According to the first aspect of the present invention, a plurality of printing units are disposed along the conveyance path of the substrate to be printed, and the printing plate cylinder provided in each printing unit is individually rotated by a driving motor to rotate the substrate. In a control device of a gravure rotary printing press configured to sequentially print on a printed material, a detecting unit that detects a printing position applied to the printing material by a printing plate cylinder of each printing unit, and printing by the detecting unit When the occurrence of misregistration is detected, correction means for correcting the above-described misregistration by adjusting the plate cylinder phase of the printing unit in which the misregistration has occurred, and the rear side of the printing unit in which the misregistration is corrected Correction means for correcting the plate cylinder phase of the printing unit located in the printing unit, and the correction means is in the same direction as the adjustment direction when the plate cylinder phase is adjusted by the correction means. Immediately after initial correction of the plate cylinder phase of the subsequent printing unit to the same level, the phase correction amount after the initial correction is reduced with the passage of time, and immediately after the correction of printing misalignment by the correcting means is performed. After the portion printed on the second printing unit reaches the second printing unit, the plate cylinder phase of the second printing unit is corrected again in the same direction as the adjustment direction of the printing cylinder phase set by the correcting means. Control for reducing the phase correction amount after re-correction as time elapses is executed.

  According to a second aspect of the present invention, in the control device for a gravure rotary printing press according to the first aspect, the plate cylinder phase of the printing unit on the rear stage side is set corresponding to the adjustment amount of the plate cylinder phase set by the correcting means. The amount of re-correction at the time of re-correction is the path length between the printing unit in which the printing misalignment is corrected and the printing unit located on the preceding stage, the printing unit in which the above-described misalignment correction is performed, and the subsequent This is set to a value corresponding to the ratio with the path length of the substrate to be printed with the printing unit located on the stage side.

  According to a third aspect of the present invention, there is provided a control device for a gravure rotary printing press according to the first or second aspect of the invention, in response to a change in the amount of expansion / contraction of the printing material that occurs after the correction of printing misalignment by the correcting means. In this configuration, the amount of phase correction after initial correction and re-correction of the plate cylinder phase is reduced.

  According to a fourth aspect of the present invention, in the control device for a gravure rotary printing press according to any one of the first to third aspects, the initial correction of the plate cylinder phase and the phase correction amount after the re-correction are performed by the correcting means. When decreasing, the phase correction amount is configured to change stepwise.

In the invention according to claim 5, a plurality of printing units are arranged along the conveyance path of the printed material, and the printing plate cylinder provided in each printing unit is individually rotated and driven by a driving motor. In a control device of a special gravure rotary printing press configured to sequentially print on a printed material, a detecting means for detecting a printing position applied to the printed material by a printing plate cylinder of each printing unit, and this detecting means Printing misalignment occurred based on the distance between the registration mark attached to the printed material in the uppermost printing unit detected by the printing plate and the register mark attached to the printed material by the printing plate cylinder of the subsequent printing unit. Fixed hand it is when it is detected, the plate cylinder phase of the printing units the print misalignment occurs by adjusting modify the printing misalignment, continuously retain its state When, and a correcting means for correcting the plate cylinder phase of the printing unit located in the subsequent stage of the printing unit to modify this print misalignment is performed, the correction means, the adjustment of the plate cylinder phase by said modifying means At the time of starting , after correcting the plate cylinder phase of the printing unit on the rear side in the same direction as the adjustment direction, control is performed to decrease the phase correction amount after this initial correction over time To do.

  According to the first aspect of the present invention, when the printing misalignment is corrected, the initial stage of changing the plate cylinder phase of the printing unit located on the rear stage side in the same direction and in the same direction as the correction direction of the printing misalignment. By executing the correction, it is possible to prevent the tension of the printing material positioned between the printing units from fluctuating according to the expansion and contraction of the printing material, and to maintain the substrate tension between the printing units constant. The printing position in the printing unit on the side and the printing position in the printing unit on the subsequent stage can be exactly matched. Then, at the time when the printed portion immediately after the correction of the printing misalignment by the correcting means reaches the rear side unit, the plate cylinder phase of the rear side unit is set in the same direction as the adjustment direction of the plate cylinder phase. By re-correction, it is possible to accurately match the printing position in the specific unit and the printing position in the downstream unit while maintaining the substrate tension between the printing units constant. It is possible to effectively prevent the printing misalignment caused by the correction of the second stage from occurring in the rear side unit and to prevent the change in the substrate tension due to the recorrection of the plate cylinder phase. By executing control to reduce the phase correction amount after correction, it is possible to suppress the expansion and contraction of the printing material positioned between the printing units, respectively, and to prevent printing misalignment. There is an advantage that the raw effectively be prevented.

  According to the invention of claim 2, the path length of the substrate between the specific unit and the upstream printing unit, and the path length of the substrate between the specific unit and the subsequent printing unit. Even when the printing cylinder phase is adjusted, the amount of expansion / contraction of the printing material is changed when the printing material expanded / contracted by adjusting the plate cylinder phase is transported from the specific unit to the downstream unit. There is an advantage that occurrence of printing misalignment can be effectively prevented.

  According to the invention of claim 3, the phase correction amount for the initial correction and re-correction of the plate cylinder phase corresponding to the expansion / contraction amount of the printing material that changes after the correction of the printing deviation by the correction means is performed. By continuously decreasing, there is an advantage that it is possible to reliably prevent the occurrence of printing misalignment due to the amount of expansion / contraction of the printing material changing with time.

  According to the invention of claim 4, after performing the initial correction and re-correction of the plate cylinder phase, the complicated control of frequently changing the phase correction amount after the initial correction and re-correction is executed. Therefore, it is possible to effectively prevent the occurrence of printing misalignment due to the change in the amount of expansion / contraction of the printing material.

  According to the fifth aspect of the present invention, based on the distance between the registration mark attached to the printed material by the uppermost printing unit and the register mark attached to the printed material by the printing plate cylinder of the subsequent printing unit. In a printing machine that performs registration of a so-called one-color tracking type that is configured to determine whether or not a printing misalignment has occurred, the printing unit plate positioned on the rear side when the misalignment is corrected. By executing an initial correction that changes the cylinder phase in the same direction as the correction direction of the printing deviation, the tension of the printing material positioned between the printing units varies according to the expansion and contraction of the printing material. Preventing the printing position in the printing unit on the front side and the printing position in the printing unit on the back side by keeping the substrate tension between the printing units constant. It can be matched exactly, respectively.

  1 to 3 show a schematic configuration of a gravure rotary printing press having a control device according to the present invention. This gravure rotary printing press applies a predetermined tension to a feeding portion 2 of a printing material 1 made of a sheet material such as a roll paper or a resin film wound in a roll shape, and to the printing material 1 fed from the feeding portion 2. An infeed unit 4 that is provided and supplied to the preheater 3, a plurality of first to fourth printing units 5 to 8 arranged along a conveyance path of the substrate 1 derived from the preheater 3, and a final stage An outfeed unit 9 that applies a predetermined tension to the printed material 1 drawn out from the fourth printing unit 8 and draws it out, and a winding unit 10 that winds up the printed material 1 drawn out by the outfeed unit 9. And have.

  The first to fourth printing units 5 to 8 include a printing plate cylinder 11 on which a printing ink is applied on the peripheral surface, and the printing material 1 disposed above the printing plate cylinder 11 to the printing plate. A printing unit 13 having a pressure cylinder 12 pressed against the cylinder is disposed, and a supply roller 14 and a discharge roller 15 for guiding the printed material 1 are provided on the inlet side and the outlet side of the printing unit 13. ing. A driving motor 16 for rotating the printing plate cylinder 11 is provided for each of the printing units 5 to 8, and a dryer 18 having a plurality of guide rollers 17 on the downstream side of the discharge roller 15. Is arranged.

  Between the discharge roller 15 and the dryer 18, a mark sensor 19 is provided for detecting the application position of the ink applied to the printing material 1 in the printing unit 13, that is, the printing position. It is provided in the control unit 20 whether or not a printing position shift (registration shift) sequentially applied to the substrate 1 by the printing plate cylinder 11 of each of the printing units 5 to 7 has occurred in accordance with the output detection signal. The correction means 21 is discriminated. Specifically, the register marks given to the substrate 1 by the printing plate cylinders 11 of the second to fourth printing units 6 to 8 and the printing of the first to third printing units 5 to 7 located on the front side thereof. The mark sensor 19 detects the interval between the register mark applied to the substrate 1 by the plate cylinder 11 and the register mark detection interval and a preset reference interval (for example, 20 mm) are used as the correction means 21. In comparison, when the deviation between the detection interval of the register mark and the reference interval is a predetermined value, for example, 1 mm or more, it is determined that printing misalignment has occurred in the corresponding printing unit.

  When the correction means 21 determines that a printing deviation has occurred in which the deviation between the registration mark detection interval and the reference interval is a predetermined value or more in any of the second to fourth printing units 6 to 8, A control signal for correcting the printing misalignment by adjusting the plate cylinder phase of the printing unit in which the printing misalignment has occurred (hereinafter referred to as a specific unit if necessary) is output to the drive motor 16 of the specific unit, and the plate A control signal indicating the cylinder phase adjustment direction and adjustment amount is output to correction means 22 that corrects the plate cylinder phase in a printing unit (hereinafter referred to as a rear-stage unit as required) located on the rear stage side of the specific unit. Is configured to do.

  The correction means 22 provided in the control unit 20 initializes the plate cylinder phase of the rear stage unit in the same direction as the adjustment direction at the time when the plate cylinder phase of the specific unit is adjusted by the correction means 21. After the correction, the phase correction amount after the initial correction is decreased with the passage of time, and the point when the printed part arrives at the rear stage unit immediately after the correction of the printing deviation by the correcting means 21 is performed. Then, after the plate cylinder phase of the rear stage unit is re-corrected in the same direction as the plate cylinder phase adjustment direction set by the correcting means 21, the phase correction amount after the re-correction is decreased with the passage of time. It is configured to perform control. The re-correction amount when re-correcting the plate cylinder phase of the latter unit corresponding to the adjustment amount of the plate cylinder phase set by the correcting means 21 is the specific unit and the latter unit on which the printing misalignment is corrected. Is set to a value corresponding to the path length of the substrate 1 between, for example, the path length (conveyance path length) between the specific unit and the rear stage side unit is the same as the specific unit and the front side print unit. The re-correction amount is set to the same value as the initial correction amount.

  The degree of decrease in the correction amount when the correction means 22 reduces the initial correction and re-correction of the plate cylinder phase is the expansion / contraction of the substrate 1 that occurs after the correction means 21 corrects the printing misalignment. It is configured to be set based on a change in the amount. That is, as shown in FIG. 3, printing misalignment has occurred in the second printing unit 6 in accordance with the detection signal output from the mark sensor (detecting means) 19 of the second printing unit 6 that performs printing of the second color. If the control for correcting the printing misalignment is performed by adjusting the rotational phase of the plate cylinder 11 of the second printing unit 6 at that time, the first printing unit 5 and the second printing unit 6 The base material length L12 which consists of the full length of the to-be-printed material 1 conveyed between is temporarily expanded-contracted by the amount corresponding to the said correction amount. After that, the substrate 1 that has not been expanded or contracted is introduced between the second and third printing units 6 and 7, so that the substrate tension acting on the substrate 1 to be conveyed is changed. Accordingly, the amount of expansion / contraction of the substrate 1 (the amount of change in the base material length) gradually decreases.

  When the printing material 1 whose expansion / contraction amount has changed in accordance with the passage of time as described above is introduced between the second printing unit 6 and the third printing unit 7 located on the rear side thereof, the expansion / contraction amount changes. Because of this, there is a possibility that the printing position may be shifted between the printing units 6 and 7, so that the degree of decrease in the correction amount is set in accordance with the change in the amount of expansion / contraction of the substrate 1 as will be described later. Further, by gradually reducing the phase correction amount after initial correction and recorrection of the plate cylinder phase with the passage of time, the substrate tension before and after the second printing unit 6 is maintained constant, and both the printing units Printing misalignment between 6 and 7 is prevented.

  In the gravure printing machine configured as described above, after the substrate 1 derived from the preheater 3 is introduced into the printing unit 5 and the first color is printed, the printing unit disposed on the subsequent stage side In 6-8, multicolor printing is performed by sequentially printing the second and subsequent colors on the substrate 1, and detection by the mark sensor 19 provided in the second to fourth printing units 6-8. Depending on the signal, printing deviation in which the deviation between the detection interval between the registration mark attached by the printing unit on the front side and the registration mark attached by the printing unit on the rear side and the reference interval set in advance becomes a certain value or more. Whether or not has occurred is determined.

  If it is determined that any printing misalignment has occurred in any of the second to fourth printing units 6 to 8 (specific unit), the printing misalignment is corrected by adjusting the plate cylinder phase of the specific unit. The control is executed in the correcting means 21, and at the same time, the plate cylinder phase of the rear stage unit is initially corrected in the same direction as the adjustment direction of the plate cylinder phase in the specific unit and then set in advance. Based on the correction amount setting table or calculation data, the correction means 22 executes control for reducing the phase correction amount after the initial correction as time elapses.

  For example, the register mark indicating the printing position of the first color and the printing position of the second color are indicated according to the detection signal output from the mark sensor 19 of the second printing unit 6 that performs the printing of the second color on the substrate 1. When it is determined that the distance from the register mark is 21 mm and this detection interval is 1 mm larger than the reference interval set to 20 mm, that is, when it is confirmed that the second printing unit 6 is a specific unit. 3 temporarily reduces the rotational speed of the printing plate cylinder 11 of the second printing unit 6 so that the plate cylinder phase of the second printing unit 6 is changed to the substrate 1 as indicated by the arrow A in FIG. The phase of the plate cylinder is adjusted by displacing it by 1 mm in the direction opposite to the conveying direction. Thereby, at the time of execution of the control for correcting the printing deviation, the base material length (conveyance length of the substrate 1) L12 between the first printing unit 5 and the second printing unit 6 is reduced by 1 mm, and The printing misalignment is corrected.

  At the same time as executing the control for correcting the printing misalignment, the rotational speed of the printing plate cylinder 11 of the third and fourth printing units 7 and 8 located on the rear side of the second printing unit 6 is temporarily reduced. As a result, the plate cylinder phase X3 of the third printing unit (rear stage unit) 8 is moved in the direction opposite to the conveyance direction of the substrate 1 as shown in the arrow B of FIG. 3 and FIG. In the same manner, the plate cylinder phase X4 of the fourth printing unit (rear-stage unit) 8 is shifted in the direction opposite to the conveyance direction of the substrate 1 while being displaced by a value (1 mm) corresponding to the phase adjustment amount of the printing unit 6. It is displaced by a value (1 mm) corresponding to the initial correction amount. In this way, the substrate length L23 between the second printing unit 6 and the third printing unit 7 at the execution time t0 of the control for correcting the printing misalignment by adjusting the plate cylinder phase of the second printing unit 6 described above. And initial correction (phase correction) for reducing the downstream substrate length by 1 mm. Thereby, the tension of the substrate 1 located between the second printing unit 6 and the third printing unit 7 and between the third printing unit 7 and the fourth printing unit 8 causes a phase shift in the second printing unit 6. It is possible to prevent fluctuation due to the influence of the correction operation, and to prevent occurrence of printing misalignment in accordance with the tension fluctuation.

  As described above, the base material length L23 between the second printing unit 6 and the third printing unit 7 and the downstream base material length (the base material between the third printing unit 7 and the fourth printing unit 8). After the initial correction for reducing the length) by 1 mm, the correction amount setting table corresponding to the following formula (1) or the exponential curve data A2 shown in FIG. The amount of expansion / contraction of the substrate 1 that occurs after the correction of the printing misalignment (phase adjustment control of the second printing unit 6) is performed by the correction means 21 by gradually reducing the phase correction amount after the initial correction based on the above. In response to this change, control for changing the plate cylinder phases X3 and X4 in the third printing unit 7 and the fourth printing unit 8 is executed.

  That is, at the time t0, the plate cylinder phase of the second printing unit 6 is adjusted to correct the printing misalignment, so that the substrate length L12 between the first printing unit 5 and the second printing unit 6 expands and contracts. The expansion / contraction amount A2 is expressed as an exponential curve as shown in the following formula (1), and changes with the passage of time as shown in FIG. 4A, for example. In the following formula (1), X12 is the plate cylinder phase adjustment amount of the second printing unit 6 performed at the time point t0, V is the conveyance speed (m / s) of the substrate 1, and S12 is the first This is a path length between the printing unit 5 and the second printing unit 6.

A2 = X12 · exp [− (V / S12) · t] (1)
The data A2 shown in FIG. 4A includes the path length between the first printing unit 5 and the second printing unit 6 and the path length S12 between the second printing unit 6 and the third printing unit 7, respectively. In order to correct the printing misalignment in the second printing unit 6 in the printing machine set to 8333 mm and the conveyance speed of the base material (substrate 1) set to 833.3 mm / s, for example, When the control of adjusting the plate cylinder phase in the direction of shortening the substrate length of the substrate 1 of the substrate 1 positioned between the second printing units 5 and 6 by 1 mm is performed, the expansion / contraction amount A2 of the substrate has elapsed time t. The state etc. which change according to are shown. From this data A2, at the execution time t0 of the control for correcting the printing misalignment, the substrate tension (tension acting on the substrate 1) between the first printing unit 5 and the second printing unit 6 is the plate cylinder. It can be seen that the shrinkage is reduced (reduced) with the lapse of time t after the shrinkage in which the base material length L12 is shortened by 1 mm is temporarily generated by decreasing according to the phase adjustment operation. .

  Next, the printing portion immediately after the correction of the printing deviation by the correcting means 21 (adjustment of the plate cylinder phase in the second printing unit 6), that is, the printing portion expanded or contracted by the correction of the printing deviation is first performed. Whether or not the third printing unit 7 has been reached is detected by a timer or the like, and when it is confirmed that the printing part has reached the third printing unit 7, as shown in FIGS. 4B and 4C. The plate cylinder phases X3 and X4 of the third and fourth printing units 7 and 8 are recorrected in the same direction as the plate cylinder phase adjustment direction set by the correcting means 21, respectively, and this recorrection amount R31 , R41 are set in advance after setting the value corresponding to the path length of the substrate 1 between the second printing unit 6 and the third and fourth printing units 7 and 8 located on the subsequent stage side. Correction amount setting table Ku is based on the operation data or the like, it executes a control to reduce with the passage of the plate cylinder phase X3, X4 correction amount time after the re-corrected.

  For example, in a normal printing machine in which all the path lengths of the substrate 1 between the first to fourth printing units 5 to 8 are set at equal intervals, the initial time is t1 when a predetermined time set by the timer has elapsed. Similar to the correction, the plate cylinder phase X3 of the third and fourth printing units 7 and 8 is temporarily reduced by temporarily reducing the rotational speed of the printing cylinder 11 of the third and fourth printing units 7 and 8. Recorrection is performed by displacing X4 in the same direction by values R31 and R41 (= X12) corresponding to the plate cylinder phase adjustment amount X12 in the second printing unit 6 (see arrow B in FIG. 3). Thus, as shown in FIGS. 4B and 4C, the base material between the second printing unit 6 and the third printing unit 7 and between the third printing unit 7 and the fourth printing unit 8. After the recorrection for reducing the length by 1 mm is performed at the time point t1, the correction unit 22 executes control for gradually decreasing the phase correction amount as the time t elapses from the time point t1.

  The plate cylinder phase X3 of the third printing unit 7 and the plate cylinder phase X4 of the fourth printing unit 8 that change with time after the re-correction performed at the time t1 are expressed by the following equations (2) and (3 ). In the formulas (2) and (3), A2 is a change amount of the substrate length between the first printing unit 5 and the second printing unit 6 obtained in the above formula (1), and A3 is a formula ( This is the amount of change in the substrate length between the second printing unit 6 and the third printing unit 7 obtained by the same equation (3.1) as in 1).

X3 = A2 + X12 (2)
X4 = A2 + A3 (3)
A3 = X12 · [(S23 / S12)] · exp [− (V / S12) · (t−td23)] (3.1)
Further, it is detected by a timer or the like whether or not the printing portion immediately after the correction of the printing deviation by the correcting means 21 (adjustment of the plate cylinder phase in the second printing unit 6) has reached the fourth printing unit 7 is reached. Then, at the time t2 when it is detected that it has reached, the plate cylinder phase X4 of the fourth printing unit 8 is re-corrected in the same direction as the plate cylinder phase adjustment direction set by the correcting means 21. After performing re-correction, the re-correction amount R42 is set to a value corresponding to the path length of the substrate 1 between the third printing unit 6 and the fourth printing unit 8 located on the subsequent stage side. Based on the correction amount setting table or calculation data set in advance according to the above equation (3), control is executed to decrease the phase correction amount after the recorrection as time elapses.

  On the other hand, the register mark indicating the printing position of the first color and the printing position of the second color are indicated in accordance with the detection signal output from the mark sensor 19 of the second printing unit 6 that prints the second color on the substrate 1. When it is determined that the distance from the register mark is 19 mm and it is confirmed that the distance is 1 mm smaller than the reference distance (20 mm), the rotational speed of the printing plate cylinder 11 of the second printing unit 6 is increased. The plate cylinder phase of the second printing unit 6 is displaced by 1 mm in the conveyance direction of the printing material 1, and the path length of the base material between the first printing unit 5 and the second printing unit 6 (the printing material 1 Control for correcting the printing misalignment is performed by extending the transport length) by 1 mm. Simultaneously with the correction control of the printing misalignment (adjustment of the plate cylinder phase in the second printing unit 6), initial correction for temporarily increasing the rotational speed of the printing cylinder 11 of the third and fourth printing units 7 and 8 is performed. As a result, the plate cylinder phases X3 and X4 of the third and fourth printing units 7 and 8 are displaced in the conveyance direction of the substrate 1 by a value (1 mm) corresponding to the correction amount of the printing deviation.

  Further, by executing the initial correction, the base material lengths between the second printing unit 6 and the third printing unit 7 and between the third printing unit 7 and the fourth printing unit 8 are each extended by 1 mm. Thereafter, the phase correction amount after the initial correction is decreased with the passage of time based on a correction amount setting table or calculation data set in advance according to the above-described formulas (2) and (3). Execute control. Next, when it is detected that the printing area immediately after the correction of the printing deviation by the correcting means 21 has reached the third printing unit 7, the plate cylinders of the third and fourth printing units 7, 8 are detected. The phases X3 and X4 are re-corrected in the same direction as the plate cylinder phase adjustment direction set by the correcting means 21, and the re-correction amount is set to the second printing unit 6 and the third and third positions located on the rear side. After setting to a value corresponding to the path length of the substrate 1 between the fourth printing units 7 and 8, a correction amount setting table or calculation data set in advance according to the above formulas (2) and (3), etc. Based on the above, the control for reducing the phase correction amount after the recorrection as time elapses, that is, the control for bringing the plate cylinder phases X3 and X4 of the third and fourth printing units 7 and 8 closer to the origin 0 direction is executed. To do.

  As described above, a plurality of printing units 5 to 8 are disposed along the conveyance path of the substrate 1, and the printing plate cylinders 11 provided in the printing units 5 to 8 are individually rotated by the drive motor 16. In the gravure rotary printing press configured to be sequentially printed on the substrate 1 by being driven, the printing positions sequentially applied to the substrate by the printing plate cylinders of the printing units 5 to 8 are detected. When it is determined that a printing misalignment has occurred based on the detection means comprising the mark sensor 19 and the printing position detected by this detection means, the plate cylinder phase of the specific unit in which this printing misalignment has occurred is adjusted to Correction means 21 for correcting printing misalignment, and correction means 22 for correcting the plate cylinder phase of the printing unit located on the rear side of the printing unit on which the printing misalignment correction has been performed, When the plate cylinder phase is adjusted by the correction means 21, the plate cylinder phases X3 and X4 of the subsequent printing unit are initially corrected in the same direction and in the same direction as the adjustment direction. The phase correction amount is decreased with the passage of time, and at the time when a portion printed immediately after the correction unit 21 corrects the printing misalignment reaches the printing unit on the subsequent stage, the correction unit 21 After re-correcting the plate cylinder phases X3 and X4 of the subsequent printing unit in the same direction as the set plate cylinder phase adjustment direction, control is performed to reduce the phase correction amount after the re-correction as time elapses. Since the correction unit 22 is configured to execute the correction, it is possible to effectively prevent the influence of the correction on the subsequent-stage unit when correcting the printing deviation sequentially applied to the substrate 1 with a simple configuration.

  That is, at the time point t0 when it is confirmed that a printing deviation has occurred according to the detection signal output from the mark sensor (detection means) 19 of the second printing unit 6 that performs the second color printing as described above. When control for correcting the printing misalignment is performed by adjusting the plate cylinder phase of the second printing unit 6 in which the printing misalignment has occurred, it is located between the first printing unit 5 and the second printing unit 6. As shown by the broken line in FIG. 3, the substrate 1 temporarily expands and contracts to change the substrate length L12, and the amount of expansion and contraction gradually decreases with time.

  For this reason, at the time point t0 when the correction of the printing deviation is performed, the plate cylinder phases X3 and X4 of the third and fourth printing units 7 and 8 positioned on the rear side of the second printing unit 6 are corrected for the printing deviation. By executing the initial correction that changes in the same direction and in the same direction as the direction, the second and third printing units 6 and 7 and the third and fourth printing units 7 and 8 correspond to the expansion and contraction of the substrate 1. The printing position of the second printing unit 6 is prevented by preventing the tension of the substrate 1 to be fluctuated and maintaining the substrate tension between the printing units 6, 7 and 7, 8 constant. , The printing positions of the fourth printing units 7 and 8 can be accurately matched. Then, the phase correction amount after the initial correction is decreased as the expansion / contraction amount of the printing material 1 positioned between the first printing unit 5 and the second printing unit 6 gradually decreases with time. Thus, the substrate tension between the printing units 6, 7 and 7, 8 can be kept constant, and printing deviation can be effectively suppressed.

  Further, the portion printed by the second printing unit 6 immediately after the correction of the printing deviation by the correcting means 21, that is, the printing portion expanded or contracted in accordance with the correction of the printing deviation, is the third printing unit on the rear stage side. 7 at time t1, by recorrecting the plate cylinder phase X3 of the third printing unit 7 in the same direction as the plate cylinder phase adjustment direction set by the correcting means 21 (R31 in FIG. 4B). And the influence of expansion and contraction corresponding to the correction of the printing misalignment is prevented from reaching the subsequent printing unit 7, the printing position in the second printing unit 6, and the third and fourth printing units 7, 8. Since the printing position in the second printing unit 6 is corrected, the printing deviation caused by the correction of the printing deviation in the second printing unit 6 occurs in the subsequent third printing unit 7. It can be effectively prevented. Further, simultaneously with the re-correction operation of the third printing unit 6, the plate cylinder phase X 4 of the fourth printing unit 8 is set in the same direction and in the same direction as the third printing unit 7 as indicated by R 41 in FIG. Since the substrate tension between the printing units 6, 7 and 7, 8 can be maintained constant by re-correcting to the printing unit, the printing misalignment caused by the fluctuation of the substrate tension is the fourth printing unit. There is an advantage that it is possible to effectively prevent the occurrence in FIG.

  Then, at the time t1 when the portion printed by the second printing unit 6 reaches the third printing unit 7 on the rear stage immediately after the correction of the printing misalignment as described above, the plate cylinder phase is re-corrected ( When R31, R41) is performed, the substrate length between the second printing unit 6 and the third printing unit 7 and between the third printing unit 7 and the fourth printing unit 8 changes, and the substrate length varies. As shown in data A3 of FIG. 4A, the substrate 1 positioned between the second printing unit 6 and the third printing unit 7 temporarily expands and contracts in accordance with the recorrection (R31, R41). At the same time, the amount of expansion / contraction changes with the passage of time. For this reason, the correction amount setting table set in advance according to the equations (2) and (3) corresponding to the fact that the expansion / contraction amount of the substrate 1 gradually decreases with time after the re-correction is performed. Alternatively, the second printing unit 6 and the third printing are executed by executing control for reducing the amount of phase correction after re-correction based on operation data, that is, control for bringing the plate cylinder phases X3 and X4 closer to the origin 0 direction. It is possible to suppress the occurrence of printing misalignment by suppressing the expansion and contraction of the printing material 1 positioned between the unit 7 and the third printing unit 7 and the fourth printing unit 8, respectively.

  Further, the plate cylinder phase set by the correcting means 21 at the time t2 when the portion printed by the second printing unit 6 arrives at the last fourth printing unit 8 immediately after the correction of the printing misalignment is performed. By performing the second re-correction for correcting the plate cylinder phase X4 of the fourth printing unit 8 in the same direction as the adjustment direction (see R42 in FIG. 4C), the printing position in the second printing unit 6 is corrected. And the printing position in the fourth printing unit 8 can be made to coincide with each other accurately, so that the printing misalignment caused by the correction of the printing misalignment in the second printing unit 6 is the fourth printing in the last stage. There is an advantage that generation in the unit 8 can be effectively prevented.

  Then, at the time t2 when the portion printed by the second printing unit 6 arrives at the fourth printing unit 8 immediately after the correction of the printing misalignment, the plate cylinder phase is corrected again for the second time (R42). As shown in data A4 of FIG. 4A, the third printing is performed by changing the base material tension between the third printing unit 7 and the fourth printing unit 8 and changing the base material length. After the printing material 1 located between the unit 7 and the fourth printing unit 8 temporarily expands and contracts according to the re-correction, the expansion / contraction amount changes with the passage of time t. For this reason, the correction set in advance according to the above equation (3) corresponding to the fact that the expansion / contraction amount of the printing material 1 gradually decreases with the lapse of time t from the time t2 when the second re-correction is performed. By executing control to reduce the phase correction amount after re-correction based on the amount setting table or calculation data, the substrate 1 positioned between the third printing unit 7 and the fourth printing unit 8 expands and contracts. It is possible to prevent the occurrence of printing misalignment.

  In the above-described embodiment, the second printing unit set by the correcting means 21 in a normal printing machine in which the path lengths of the substrate 1 between the first to fourth printing units 5 to 8 are all set at equal intervals. Although the example in which the adjustment amount of the plate cylinder phase in 6 and the recorrection amount when recorrecting the plate cylinder phases X3 and X4 of the printing units 7 and 8 on the rear stage side are set to the same value has been described, When all the path lengths of the substrate 1 between the fourth printing units 5 to 8 are not equal, the re-correction amount is set to the second printing unit 6 in which the printing deviation is corrected and the preceding stage. The path length S12 of the substrate 1 between the first printing unit 5 and the path length S23 of the substrate 1 between the second printing unit 6 and the third printing unit 7 positioned on the subsequent stage side. Set to a value corresponding to the ratio of Rukoto is desirable.

  For example, a special printing machine in which the path length between the second printing unit 6 and the third printing unit 7 is set to twice the path length between the first printing unit 5 and the second printing unit 6; Alternatively, in a printing machine in which the downstream path length of the second printing unit 6 is set to double the upstream side by omitting printing in the printing unit on the downstream side of the second printing unit 6, it is set by a timer or the like. 5 at a time point t1 when it is confirmed that the printed part has reached the third and fourth printing units 7 and 8 on the rear side immediately after the predetermined time has elapsed and the correction of the printing misalignment has been performed. As shown in (b) and (c), the plate cylinder phases X3 and X4 of the third and fourth printing units 7 and 8 are set to a value (2 mm) corresponding to twice the initial correction amount set to 1 mm. At this point after executing re-correction (R31, R41) to displace Performing the correction means 22 gradually controlled to reduce the phase compensation amount in response to the 1 to elapse time t.

  As described above, in the printing press in which the path length on the downstream side of the second printing unit 6 is different from the path length on the upstream side, the phase correction amounts R31 and R41 at the time of the recorrection are set to values different from the initial correction amount. In this case, since this re-correction is executed, the tension of the printing material 1 located on the upstream side of the third printing unit 7 fluctuates and the influence reaches the downstream side. The correction amount of the plate cylinder phase X3 in the third printing unit 7 corresponding to the change in the substrate length L12 between the printing unit 6 and the third printing unit 7 is a value represented by the following equations (4) and (5). Is set. In the equations (4) and (5), X12 is the correction amount of the plate cylinder phase in the second printing unit 6 performed at the time point t0, and S23 is the relationship between the second printing unit 6 and the third printing unit 7. The td23 is a path length between the second printing unit 6 and the third printing unit 7 immediately after the correction of the printing misalignment at the time t0. Is the time. In FIG. 5A, A3 is the amount of change in the substrate length L23 that occurs between the second printing unit 6 and the third printing unit 7 under the influence of the recorrection, and is expressed by the following equation (5.1). ).

X3 = A2 + B3 + X12 (4)
B3 = X12 · [(S23 / S12) −1] · exp [− (V / S12) · (t−td23)] (5)
A3 = X12 · [(S23 / S12)] · exp [− (V / S12) · (t−td23)] (5.1)
Further, a special path length S23 between the second printing unit 6 and the third printing unit 7 is set to ½ of a path length S12 between the first printing unit 5 and the second printing unit 6. Printing machine in which the path length S23 on the downstream side of the second printing unit 6 is set to ½ on the upstream side, for example, by omitting printing in the printing machine or the printing unit on the upstream side of the second printing unit 6 Then, at a time t1 when it is confirmed that a portion printed after the predetermined time set by the timer or the like has reached the printing unit on the rear stage immediately after the correction of the printing misalignment is performed, for example, FIG. 6 (b) and 6 (c), the plate cylinder phases X3 and X4 of the third and fourth printing units 7 and 8 are set to a value (0.5 mm) corresponding to ½ of the initial correction amount (1 mm). ) For re-correction (R31, R41) To run. As the time t elapses from the time point t1, the correction amounts of the plate cylinder phases X3 and X4 are set in advance according to the equations (4) and (5). Based on the above, it is desirable to execute the gradually decreasing control in the correcting means 22. In this case, B3 in the above formula (4) is a value on the plus side (extension direction) as shown in FIG.

  Recorrection amounts R31 and R41 for recorrecting the plate cylinder phases X3 and X4 of the printing units 7 and 8 on the rear side corresponding to the adjustment amount of the plate cylinder phase set by the correcting means 21 as described above are as follows. It is set to a value corresponding to the path length S23 of the substrate 1 between the second printing unit 6 in which the printing misalignment has been corrected and the third and fourth printing units 7 and 8 located on the subsequent stage side. According to the configuration, when the path length S12 of the base material between the specific unit and the upstream printing unit is different from the path length S23 of the base material between the specific unit and the subsequent printing unit. In this case, the amount of expansion / contraction of the printing material 1 changes when the printing material 1 expanded and contracted by adjusting the plate cylinder phase is conveyed from the printing unit 6 to the printing units 7 and 8. Printing There is an advantage that the occurrence of Les can be effectively prevented.

  That is, when the path length S23 between the second printing unit 6 and the third printing unit 8 is large, a printing position shift caused by a change in the amount of expansion / contraction of the substrate 1 causes the printing unit 7 on the rear side. , 8 and the path length S23 between the second printing unit 6 and the third printing unit 8 is small, the change in the printing position in the subsequent printing units 7, 8 is small. Accordingly, by changing the re-correction amounts R31 and R41 when re-correcting the plate cylinder phases X3 and X4 of the printing units 7 and 8 on the subsequent stage, the print substrate 1 It is possible to effectively prevent the occurrence of printing misalignment due to the change in the amount of expansion / contraction.

  Further, as shown in the above-described embodiment, the expansion / contraction amount of the printing material 1 that changes after the correction of the printing deviation by the correction unit 21 is performed, that is, the exponential curve shown in the above formula (1), FIG. Correspondingly, when the phase correction amount for the initial correction and re-correction of the plate cylinder phases X3 and X4 is continuously decreased, the amount of expansion / contraction of 1 of the substrate gradually increases with the passage of time t. The amount of expansion / contraction of the substrate 1 and the amount of correction of the plate cylinder phases X3 and X4 in the third and fourth printing units 7 and 8 are reduced by decreasing the phase correction amount after the initial correction according to the decrease. Therefore, there is an advantage that it is possible to reliably prevent the occurrence of printing misalignment due to the change in the amount of expansion / contraction of the substrate 1 with the passage of time t.

  After the initial correction and re-correction of the plate cylinder phases X3 and X4 by the correction means 22, the phase correction amount after the initial correction and re-correction is changed stepwise as time elapses. In this case, the occurrence of printing misalignment due to the change in the amount of expansion / contraction of the substrate 1 after the initial correction and recorrection of the plate cylinder phases X3 and X4 is simplified. It can be effectively prevented by the configuration. For example, as shown in FIGS. 7B and 7C, an average value of the expansion / contraction amount of the substrate 1 that changes after the correction of the printing deviation by the correction unit 21 is calculated every predetermined time. The phase correction amount after the initial correction and the recorrection may be changed stepwise for each predetermined time in accordance with the value. According to this configuration, after performing the initial correction and re-correction of the plate cylinder phases X3 and X4, without performing complicated control of frequently changing the phase correction amount after the initial correction and re-correction, There is an advantage that it is possible to effectively prevent the occurrence of printing misalignment due to the change in the amount of expansion / contraction of the substrate 1.

  In the said embodiment, the register mark attached | subjected to the to-be-printed material 1 with the printing plate cylinder 11 of the 2nd-4th printing unit 6-8 of a back | latter stage side, and the 1st-3rd printing unit 5 located in the front | former stage side. 7 is configured to determine that a printing misalignment has occurred in the corresponding printing unit by comparing the detection interval of the register mark attached to the printing material 1 by the printing plate cylinder 11 with a reference interval set in advance. The general gravure rotary printing press, that is, the so-called follow-up type printing press has been described as a suitable example of the present invention, but is applied to the substrate 1 in the first printing unit 5 which is the uppermost portion. The registration marks and the register marks attached to the substrate 1 by the printing plate cylinders 11 of the second to fourth printing units 6 to 8 on the rear side, respectively. Tsu special gravure rotary printing press printing deviation is configured to determine to have occurred in the bets, the present invention is also applicable to so-called color chasing printing machine to perform the type of registration.

In the printing machine that performs the one-color tracking type registration, when it is determined that a printing misalignment has occurred in the second printing unit 6 based on the printing position detected by the detection means including the mark sensor 19, the time t0 As shown in FIG. 8, the printing cylinder phase X2 of the second unit 6 in which the printing deviation has occurred is adjusted to correct the printing deviation and the state is continuously maintained . Simultaneously with the start of the adjustment, the plate cylinder phases of the third and fourth printing units 7 and 8 on the rear stage side are initially corrected in the same direction as the adjustment direction, and the phase correction amounts X3 and X4 after the initial correction are obtained. This is different from a printing machine that performs the follow-up type registration in that only the control to be reduced with the passage of time is executed in the correction means 21 and the correction means 22 and no subsequent re-correction is performed.

  That is, in the printing press that performs the follow-up type registration, for example, as shown in FIG. 4B, the plate cylinder phase is detected at the time t0 when it is detected that the printing deviation has occurred in the second printing unit 6. Is adjusted so that the tension of the substrate 1 between the first printing unit 5 and the second printing unit 6 changes, so that the position of the registration mark applied in the second printing unit 6 is minute. A gap occurs. For this reason, when the printing part to which the registration mark is attached reaches the third printing unit 6, the registration mark attached in the second printing unit 6 and the third printing unit 7 are not subjected to the re-correction. If it is determined whether or not a printing position shift has occurred based on the detection interval with the attached registration mark, there is a possibility that an accurate determination cannot be made. Therefore, when the printing portion to which the registration mark is added in the second printing unit 6 reaches the third printing unit 6, the re-correction is performed, so that the registration mark attached to the second printing unit 6 and the third printing mark Based on the detection interval from the registration mark attached in the printing unit 7, it is possible to accurately determine whether or not the printing position has shifted.

  On the other hand, in the printing machine that performs the one-color tracking type registration, the registration mark attached to the substrate 1 in the first printing unit 5 that is the uppermost stage and the second to fourth printing units 6 on the rear stage side. The second printing unit is configured to discriminate that a printing deviation has occurred in the corresponding printing unit based on the interval between the printing plate cylinder 11 and the register mark attached to the printing material 1. At time t0 when it was detected that a printing misalignment occurred at 6, a slight misalignment occurred at the position of the registration mark applied in the second printing unit 6 due to the adjustment of the plate cylinder phase X 2. Even in this case, the second to fourth marks on the rear stage side are not affected by the registration marks on the substrate 1 in the first printing unit 5 which is the uppermost stage. Whether misregistration in units 6-8 has occurred can be determined accurately.

  Therefore, when it is determined that a printing misalignment has occurred in the second printing unit 6 based on the printing position detected by the detection means including the mark sensor 19 as described above, as shown in FIG. The printing cylinder phase X2 of the second unit 6 in which the printing deviation has occurred is adjusted to correct the printing deviation, and the third and fourth printing units 7 on the rear stage side in the same direction and in the same direction as the adjustment direction. After the initial correction of the plate cylinder phases X3 and X4 in FIG. 8, only the control for reducing the phase correction amount with the passage of time after the initial correction is executed in the correcting means 21 and the correcting means 22, thereby simplifying the configuration. Thus, there is an advantage in that when the printing deviation sequentially applied to the substrate 1 is corrected, it is possible to effectively prevent the influence from reaching the subsequent unit.

  For example, in a printing machine that performs the one-color tracking type registration, it is assumed that a printing misalignment has occurred in the second printing unit 6 based on the printing position detected by the detection means including the mark sensor 19. When the phase correction of the third and fourth printing units 7 and 8 on the rear stage side is not performed by adjusting only the plate cylinder phase X2 of the second unit 6 in which the ink is generated, the second to fourth printing units 6 to 8 are used. As a result of an experiment for detecting the state of printing misalignments Y2 to Y4 occurring in FIG. 9, remarkable printing misalignments Y3 and Y4 occurred in the third and fourth printing units 7 and 8 on the rear stage as shown in FIG. Was confirmed.

  In the printing machine that performs the one-color tracking type registration, the plate cylinder phase X2 of the second unit 6 that is assumed to have undergone printing misalignment is adjusted, and the rear side of the second unit 6 is adjusted in the same direction and at the same level as the adjustment direction. After correcting the plate cylinder phases X3 and X4 of the third and fourth printing units 7 and 8, the corrected phase correction amount is reduced as time passes, and the follow-up type registration is performed. As in the case of the printing machine, when the plate cylinder phases X3 and X4 of the third and fourth printing units 7 and 8 are readjusted at a predetermined time point, as shown in FIG. It was confirmed that large printing deviations Y3 and Y4 occurred in the units 7 and 8 in sequence.

  On the other hand, the printing cylinder phase X2 of the second unit 6 in which the printing misalignment has occurred as described above is adjusted to correct the printing misalignment. After correcting the plate cylinder phases X3 and X4 of the fourth printing units 7 and 8, when performing control to reduce the corrected phase correction amount with the passage of time, as shown in FIG. In the third and fourth printing units 7 and 8 on the rear stage side, the occurrence of printing misalignments Y3 and Y4 was hardly observed.

  Therefore, in a printing machine that performs one-color tracking type registration, at the time t0 when it is determined that a printing misalignment has occurred in the second printing unit 6 based on the printing position detected by the detection means including the mark sensor 19, FIG. As shown in FIG. 8, the printing cylinder phase X2 of the second unit 6 in which the printing misalignment has occurred is adjusted to correct the printing misalignment, and the third and third stages on the rear stage side in the same direction and the same direction as the adjustment direction. After the initial correction of the plate cylinder phases X3 and X4 of the four printing units 7 and 8, only the control for reducing the phase correction amount after the initial correction with the passage of time is executed in the correction means 21 and the correction means 22. It can be seen from the above experimental data that the occurrence of printing misalignment can be effectively suppressed by doing so.

It is explanatory drawing which shows the whole structure of the gravure rotary printing press provided with the control apparatus which concerns on this invention. It is explanatory drawing which shows embodiment of the control apparatus of the gravure rotary printing press which concerns on this invention. It is explanatory drawing which shows the adjustment effect | action of a plate cylinder phase. It is a time chart which shows the change state of substrate length and plate cylinder phase in a 1st embodiment of the present invention. It is a time chart which shows the change state of substrate length and plate cylinder phase in a 2nd embodiment of the present invention. It is a time chart which shows the change state of substrate length and plate cylinder phase in a 3rd embodiment of the present invention. It is a time chart which shows the change state of the plate cylinder phase in 4th Embodiment of this invention. It is a time chart which shows the change state of plate cylinder phase in a 5th embodiment of the present invention. It is a time chart which shows the change state of printing deviation in the comparative example of the present invention. It is a time chart which shows the change state of printing deviation in the comparative example of the present invention. It is a time chart which shows the change state of printing deviation in a 5th embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Substrate 5-8 Printing unit 11 Printing plate cylinder 16 Drive motor 19 Mark sensor (detection means)
21 Correction means 22 Correction means

Claims (5)

  A plurality of printing units are arranged along the conveyance path of the printing material, and the printing plate cylinder provided in each printing unit is individually rotated by a driving motor to sequentially print on the printing material. In the control device for a gravure rotary printing press configured as described above, a detection means for detecting the printing position applied to the printing material by the printing plate cylinder of each printing unit, and the occurrence of printing misalignment is detected by this detection means Further, a correcting means for correcting the printing misalignment by adjusting the plate cylinder phase of the printing unit in which the printing misalignment has occurred, and the plate cylinder of the printing unit located on the rear side of the printing unit in which the printing misalignment has been corrected. Correction means for correcting the phase, and when the plate cylinder phase is adjusted by the correction means, the correction means prints on the rear side in the same direction as the adjustment direction. After initial correction of the plate cylinder phase of the knit, the amount of phase correction after the initial correction is reduced as time elapses, and the printed part immediately after the correction of the printing deviation by the correction means is After reaching the printing unit on the side, after correcting the plate cylinder phase of the printing unit on the rear side in the same direction as the adjustment direction of the plate cylinder phase set by the correcting means, the phase correction amount after this re-correction A control device for a gravure rotary printing press, wherein the control is performed to decrease the amount of ink as time elapses.   The re-correction amount when re-correcting the plate cylinder phase of the printing unit on the rear side corresponding to the adjustment amount of the plate cylinder phase set by the correcting means is the printing unit in which the printing misalignment is corrected and its front side. To a value corresponding to the ratio of the path length between the printing unit located in the printing unit and the path length of the substrate between the printing unit where the printing deviation correction is performed and the printing unit located on the subsequent stage side. 2. The control device for a gravure rotary printing press according to claim 1, wherein the control device is set.   The configuration is such that the initial correction of the plate cylinder phase and the phase correction amount after re-correction are reduced in response to a change in the amount of expansion / contraction of the printing material that occurs after correction of printing misalignment by the correcting means. The control device for a gravure rotary printing press according to claim 1 or 2.   The phase correction amount is configured to change stepwise when the correction means reduces the phase correction amount after initial correction and recorrection of the plate cylinder phase. A control device for a gravure rotary printing press according to item 1. A plurality of printing units are arranged along the conveyance path of the printing material, and the printing plate cylinder provided in each printing unit is individually rotated by a driving motor to sequentially print on the printing material. In the control device of the special gravure rotary printing press configured as described above, the detecting means for detecting the printing position applied to the printing material by the printing plate cylinder of each printing unit, and the uppermost part detected by the detecting means When it is detected that a printing misalignment has occurred based on the interval between the registration mark attached to the printing material in the printing unit and the register mark attached to the printing material by the printing plate cylinder of the printing unit on the subsequent stage side, the plate cylinder phase of the printing units the print misalignment occurs by adjusting modify the printing misalignment, and correcting means for continuously retaining its state of the print misalignment Osamu And a correcting means for correcting the plate cylinder phase of the printing unit located in the subsequent stage of the printing units is performed, the correction means, when the adjustment of the plate cylinder phase is initiated by said correcting means, that A gravure characterized in that after correcting the plate cylinder phase of the printing unit on the rear side in the same direction as the adjustment direction, control is performed to reduce the phase correction amount after the initial correction as time passes. Control device for rotary printing press.

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