JP2023124397A - Printing control device and printer as well as printing control method - Google Patents

Abstract

To provide a printing control device and a printer as well as a printing control method which reduce waste sheets by shortening register adjustment time to reduce printing costs.SOLUTION: The printing control device comprises a register adjustment device that adjusts misregister in a conveying direction or in a width direction of a web, a register adjustment value calculating part that calculates an adjustment value of the misregister in accordance with change with time of a blanket, and a register control device that controls the register adjustment device on the basis of the adjustment value calculated by the register adjustment value calculating part.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a print control device that adjusts and controls registration of a web, a printing press that includes the print control device, and a print control method.

A newspaper offset rotary press includes a feeder, a printer, a web path, and a folder. The printing apparatus is a tower type in which a plurality of printing units are arranged along the vertical direction so as to enable four-color printing. In the tower-type printing apparatus, printing is continuously performed in each printing unit while the web is conveyed from the bottom to the top. At this time, since the printing apparatus performs four-color printing, it is necessary to perform register adjustment for adjusting the overlay positional accuracy of each color and the printing positional accuracy of the front and back surfaces.

The register adjustment includes adjustment in the conveying direction of the web (vertical register adjustment) and adjustment in the width direction of the web (lateral register adjustment). The printing apparatus is provided with a camera for photographing the front and back of the web above the printed web is discharged. The camera photographs the four-color register marks printed on the web, and the register adjusting device performs vertical register adjustment and lateral register adjustment based on the amount of deviation of the four-color register marks. Also, the adjustment across the width of the web causes misregistration due to the widthwise elongation of the web. As this register adjustment, fan-out adjustment is performed. For example, there is a fan-out suppression control device described in Japanese Unexamined Patent Application Publication No. 2002-200011 as a device that performs fan-out adjustment.

Japanese Patent Application Laid-Open No. 2021-062560

For example, when performing fan-out adjustment by a fan-out suppression control device, a preset value is set as an adjustment amount. The fan-out suppression control device sets a preset value as the pressing amount of the pressing member that presses the web, and performs fine adjustment by changing the preset value based on the deviation amount of the four-color register marks printed on the web after printing. . In the printing apparatus, when a pair of rotating blanket cylinders sandwiches and conveys the web, the design (ink) of the blanket cylinders is transferred to the web. Since the pair of blanket cylinders has a predetermined nip width, the blanket cylinders and the web are in a pressed state. As a result, the surface of the blanket deteriorates due to long-term use of the blanket cylinder. Surface deterioration of the blanket affects the pressing amount of the pressing member. As a result, the difference between the preset value entered for fan-out adjustment and the actual adjustment value becomes large, and the time required to perform fan-out adjustment increases, resulting in an increase in wasted paper and an increase in printing costs. I have a problem.

An object of the present disclosure is to solve the above-described problems, and to provide a print control device, a printing press, and a print control method that reduce the amount of wasted paper by shortening the registration adjustment time, thereby reducing the printing cost. and

The print control apparatus of the present disclosure for achieving the above object includes a register adjusting device that adjusts the misregister in the transport direction or the width direction of the web, and a register that calculates the misregister adjustment value according to the change over time of the blanket. an adjustment value calculation unit; and a register control device that controls the register adjustment device based on the adjustment value calculated by the register adjustment value calculation unit.

Further, the printing press of the present disclosure is a printing press in which a plurality of printing units are arranged at predetermined intervals in the vertical direction, and the web is conveyed upward in the vertical direction, and the printing control device is provided with: be done.

Further, the print control method of the present disclosure includes a step of calculating a misregistration adjustment value according to a change in the blanket over time, a step of adjusting the misregistration in the transport direction or width direction of the web based on the adjustment value, have

According to the print control device, the printing press, and the print control method of the present disclosure, by shortening the register adjustment time, it is possible to reduce waste paper and reduce printing costs.

FIG. 1 is a schematic configuration diagram showing a newspaper offset rotary printing press. FIG. 2 is a schematic diagram showing the printing unit. FIG. 3 is a schematic diagram showing the first register adjustment device. FIG. 4 is a schematic diagram showing a second register adjustment device. FIG. 5 is a block diagram showing the print control apparatus of this embodiment. FIG. 6 is a graph showing changes in adjustment values with respect to the wear amount of the blanket. FIG. 7 is a graph showing changes in adjustment values for each blanket replacement. FIG. 8 is a table for explaining a method of calculating preset values for adjustment values. FIG. 9 is a graph illustrating a first modification of the method of calculating preset values for adjustment values. FIG. 10 is a graph illustrating a second modification of the method of calculating preset values for adjustment values when initial values are different. FIG. 11 is a graph illustrating a third modification of the method of calculating preset values for adjustment values when initial values are different. FIG. 12 is a graph explaining a method of estimating the blanket replacement timing based on the adjustment value. FIG. 13 is a graph for explaining a modification of the blanket replacement timing estimation method based on the adjustment value. FIG. 14 is a flowchart for explaining the print control method of this embodiment. FIG. 15 is a time chart for explaining the print control method of this embodiment.

Preferred embodiments of the present disclosure will be described in detail below with reference to the drawings. It should be noted that the present disclosure is not limited by this embodiment, and when there are a plurality of embodiments, the present disclosure also includes a combination of each embodiment. In addition, components in the embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those that are within the so-called equivalent range.

<Newspaper offset web press>
FIG. 1 is a schematic configuration diagram showing a newspaper offset rotary printing press. The offset rotary press for newspapers of this embodiment is a 4×1 rotary press in which the size of the plate cylinder of the printing device is set to 4 page widths×1 page circumference length. It may be a 4×2 rotary press set to ×2 page perimeter.

As shown in FIG. 1, the printing press of this embodiment is an offset rotary printing press P for newspapers. A newspaper offset rotary printing press (hereinafter referred to as a printing press) P includes a paper feeding device R, an infeed device I, a printing device U, a web path device D, and a folding machine F.

The paper feeder R has a plurality of (five in this embodiment) paper feed units R1 to R5. The infeed device I has a plurality of (five in this embodiment) infeed units I1 to I5. The printing apparatus U has a plurality (five units in this embodiment) of printing units U1 to U5. The web pass device D has one web pass unit D1. The folding machine F has one folding unit F1.

In the paper feeder R, the paper feed units R1 to R5 have substantially the same configuration and have holding arms for holding three rolls of web (printing medium) W wound in rolls. By rotating the holding arm, the paper roll can be rotated to the paper feeding position. In the infeed device I, the infeed units I1 to I5 have substantially the same configuration. To stably maintain the tension of W at an appropriate value. The tension of the web W from the paper feeding device R to the infeed device I is applied by braking devices provided in the paper feeding units R1 to R5.

In the printing apparatus U, the printing units U1 to U5 are multi-color printing units capable of double-sided four-color printing. However, each of the printing units U1 to U5 can be divided into upper and lower printing units U11 to U52 capable of double-sided two-color printing. The printing units U11 to U52 have substantially the same configuration and have ink supply devices, plate cylinders, blanket cylinders, and the like.

In web path device D, web path unit D1 is provided for printing units U1 to U5. The web pass unit D1 includes a slitter that cuts the web W in the longitudinal direction (conveying direction of the web W) at the center of the width direction, a turn bar that sets the conveying route of the longitudinally cut web W, and a longitudinal direction of the web W. It has a compensator or the like that adjusts the pattern position in the direction. Each web W printed by the printing units U1 to U5 is vertically cut by the slitter in the web pass unit D1, the conveying path is changed by the turn bar, and the pattern position is adjusted by the compensator, and then in a predetermined order. superimposed.

In the folding machine F, the folding unit F1 longitudinally folds a plurality of webs W superimposed and introduced from the web path unit D1, laterally cuts them to a predetermined length, and laterally folds them into signatures. Formed and ejected as a newspaper.

<Print unit>
FIG. 2 is a schematic configuration diagram showing a printing unit in an offset rotary printing press for newspapers.

As shown in FIG. 2, the printing unit U1 forms an H-shaped tower unit so as to enable four-color printing. The printing unit U1 has four stacks 21, 22, 23, and 24 of black, indigo, red, and yellow along the conveying direction of the web W (vertical direction in FIG. 2) (from the bottom to the top). are arranged, and the stacks 21, 22, 23, and 24 are arranged in a symmetrical roller arrangement. Note that the printing unit is not limited to the H-shaped tower unit.

The stacks 21 , 22 , 23 , 24 are laterally opposed to each other with the blanket cylinders 31 a , 31 b , 32 a , 32 b , 33 a , 33 b , 34 a , 34 b in contact with each other across the transport path of the web W . Blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b are in contact with plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, and 44b. The stacks 21, 22, 23, 24 are provided with ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b for plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b. be provided. Also, the stacks 21, 22, 23, 24 are applied to the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b with dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b is provided.

The printing unit U1 is provided with a register mark detecting device 70, a first register adjusting device 71, and a second register adjusting device 72. As shown in FIG. The register mark detection device 70 has CCD cameras 81 and 82, for example. CCD cameras 81 and 82 are arranged to face the front and back surfaces of the web W. As shown in FIG. CCD cameras 81 and 82 photograph register marks printed on the front and back surfaces of the web W, respectively. The first register adjusting device 71 performs register adjustment (vertical register adjustment) in the conveying direction of the web W based on the detection result of the register mark detecting device 70 . The second register adjusting device 72 performs register adjustment (fan-out adjustment) in the width direction of the web W based on the detection result of the register mark detecting device 70 . A first register adjustment device 71 is arranged in the stack 21 , 22 , 23 , 24 . A second register adjustment device 72 is arranged between the stacks 22 and 23 . The second register adjusting device 72 may be arranged between the stacks 21 and 22 or between the stacks 23 and 24 . Although not shown, a third register adjusting device is provided for performing register adjustment (horizontal register adjustment) in the horizontal direction of the web W based on the detection result of the register mark detecting device 70 .

<First register adjustment device>
FIG. 3 is a schematic diagram showing the first register adjustment device.

As shown in FIG. 3, printing unit U1 has four stacks 21, 22, 23, and 24. As shown in FIG. The stacks 21, 22, 23, 24 each have blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b. The blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are independently driven by drive motors 91, 92, 93, 94, respectively. can be driven and rotated. The drive motors 91, 92, 93, 94 drive and rotate the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b to rotate the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a. , 34b is conveyed.

The first register adjusting device 71 has drive motors 91 , 92 , 93 and 94 , vertical register motors 95 , 96 , 97 and 98 and a first register control device 99 . The first registration control device 99 controls the drive motors 91, 92, 93, 94 and the top-and-bottom registration motors 95, 96, 97, 98 based on the positions of the front and back registration marks of the web W photographed by the CCD cameras 81, 82. By doing so, the top-bottom register adjustment is performed. The register mark is, for example, a cross mark printed on each non-printing area on the front and back surfaces of the web W. As shown in FIG. A register mark is provided for each printing color (four colors in this embodiment). If the four-color register marks are misaligned in the transport direction of the web W, top-to-bottom register adjustment is required.

The first registration control device 99 requires vertical registration adjustment when the four-color registration marks photographed by the CCD cameras 81 and 82 are deviated from the vertical reference position by a predetermined vertical reference length or more in the conveying direction. Determine that there is. Then, the first registration control device 99 controls the drive motors 91, 92, 93, and 94 and the top-and-bottom registration motors 95, 96, 97, 95, 96, 97, 98 are independently driven and controlled. That is, the first register control device 99 individually adjusts the rotational phases of the drive motors 91, 92, 93 and 94, thereby adjusting the circumferences of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a and 34b. Adjust the phase of the directions individually. The first register control device 99 individually adjusts the rotational phases of the vertical register motors 95, 96, 97, and 98, thereby individually adjusting the circumferential phases of the plate cylinders 41b, 42b, 43b, and 44b. . By adjusting the circumferential phases of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b and the plate cylinders 41b, 42b, 43b, and 44, the vertical positions of the four-color register marks are adjusted. is adjusted.

<Second register adjusting device>
FIG. 4 is a schematic diagram showing a second register adjustment device.

As shown in FIG. 4, the second register adjusting device 72 is a so-called fan-out adjusting device. The second register adjusting device 72 has a plurality of (eight in this embodiment) pressing rollers (pressing members) 101 , a moving device 102 , and a second register control device 103 . The second register control device 103 performs fan-out adjustment by controlling the moving device 102 based on the positions of the register marks on the front and back sides of the web W photographed by the CCD cameras 81 and 82 . If the four-color register marks are misaligned in the width direction of the web W, fan-out adjustment is required.

A plurality of pressure rollers 101 are arranged on one side of the web W (for example, the front side). The plurality of pressure rollers 101 are supported by a support plate 104 at predetermined intervals (preferably, equal intervals) in the width direction of the web W. As shown in FIG. The support plate 104 is arranged horizontally along the width direction of the web W on one side of the web W. As shown in FIG. The support plate 104 is spaced apart from one side of the web W. As shown in FIG. A plurality of pressure rollers 101 are rotatably supported by a support plate 104 with a rotation axis along the width direction of the web W. As shown in FIG.

The moving device 102 can press the web W by moving the plurality of pressing rollers 101 in the thickness direction of the web W. As shown in FIG. The moving devices 102 are arranged on both sides of the web W in the width direction. The moving device 102 can drive and rotate the screw shaft 105 in forward and reverse directions. The screw shaft 105 is arranged along a direction orthogonal to the web W. As shown in FIG. The screw shaft 105 is screwed with the supporting member 106 . The support members 106 are connected to the longitudinal ends of the support plate 104 .

When each moving device 102 is driven to rotate each screw shaft 105 in the forward rotation direction, each support member 106 advances. Then, the support plate 104 connected to each support member 106 advances, and the plurality of pressure rollers 101 move in the direction of approaching and pressing the web W. As shown in FIG. On the other hand, when each moving device 102 is driven and each screw shaft 105 is rotated in the reverse rotation direction, each support member 106 retreats. Then, the support plate 104 connected to each support member 106 retreats, and the plurality of pressure rollers 101 move away from the web W in the direction of releasing the pressure.

The second register control device 103 requires fan-out adjustment when the four-color register marks photographed by the CCD cameras 81 and 82 are deviated from the left and right reference positions by a predetermined left and right reference length or more in the width direction. Determine that there is. Then, the second register control device 103 drives and controls the moving device 102 so that the four-color register mark and the left-right reference position are less than the left-right reference length. That is, the second register control device 103 moves the plurality of pressing rollers 101 in a direction approaching the web W by the moving device 102, and presses the web W from one side. Then, the web W becomes wavy because the portions pressed by the pressing rollers 101 protrude to the other side, and the length in the width direction is corrected in the direction of shortening, so that the four-color register marks The position in the width direction is adjusted.

As shown in FIG. 3, the printing unit U1 is provided with a third register adjusting device 73. As shown in FIG. The third register adjusting device 73 has left and right register motors 111 , 112 , 113 , 114 , 115 , 116 , 117 and 118 and a third register control device 119 . The third register control device 119 controls the left and right register motors 111, 112, 113, 114, 115, 116, 117, and 118 based on the positions of the front and back register marks of the web W photographed by the CCD cameras 81 and 82. Then, the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are moved in the width direction to adjust the left-right register.

The control device as the register control device 99, 103, 119 is a controller. For example, various programs stored in a storage unit are executed by a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). It is realized by being executed as a work area. The three register control devices 99, 103, 119 may be configured as one control device.

When the printing unit U1 prints on the web W, not only ink is transferred to the front and back surfaces of the web W, but also dampening water is transferred thereon. The web W absorbs the dampening water, and printing pressure is applied by the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b. Further, the web W is under tension in the transport direction. Therefore, the web W extends in the width direction and the transport direction, and misregistration occurs due to top-to-bottom misregistration and fan-out. As described above, the first register adjustment device 71 corrects vertical misregistration, and the second register adjustment device 72 corrects misregistration due to fan-out.

However, misregistration due to top-bottom misregistration and fan-out is not caused solely by the factors described above. The blanket cylinder is configured by wrapping a rubber blanket around the outer periphery of the cylinder body. A pair of blanket cylinders facing each other with the web W therebetween are in a pressed state because a predetermined nip width is set. As a result, the surface of the blanket is worn away over a long period of time, gradually becoming thinner, and the surface is degraded. As the blanket wears and becomes thinner, the blanket cylinder has a smaller outer diameter and a smaller nip width than before the blanket was worn. As a result, the feed amount of the web W per one rotation of the blanket cylinder decreases, and the transport speed of the web W decreases. The folding machine has a drive roller that conveys the web W independently of the printing device. The tension in the web W increases. As a result, the web W is stretched in the conveying direction (top-to-bottom direction), which causes top-to-bottom misregistration. When the web W is stretched in the conveying direction (vertical direction), the length in the width direction becomes relatively short. As a result, the generated fan-out, that is, the extension in the width direction becomes smaller than expected, the register adjustment by the second register adjusting device 72 is not properly performed, and the misregister due to the fan-out may not be corrected. be.

The present embodiment provides a print control device that can quickly adjust misregistration due to top-bottom misregistration and fan-out of the web W even when the blanket is worn.

<Print control device>
FIG. 5 is a block diagram showing the print control apparatus of this embodiment.

As shown in FIG. 5, the print control device 200 includes a first register adjusting device 71, a second register adjusting device 72, a register adjustment value calculating section 201, a first register controlling device 99, and a second register controlling device. 103.

The register adjustment value calculation unit 201 is connected to the CCD cameras 81 and 82 of the register mark detection device 70, and receives images captured by the CCD cameras 81 and 82 as still images. The register adjustment value calculation unit 201 is connected to the first register control device 99 and the second register control device 103, the first register control device 99 is connected to the first register adjustment device 71, and the second register control device 103 is connected to , a second register adjustment device 72 is connected.

The first register adjusting device 71 adjusts the top-bottom misregister of the web W after printing. The second register adjusting device 72 adjusts misregister due to fan-out of the web W after printing. The first register control device 99 controls the first register adjustment device 71 based on the detection results of the register mark detection device 70 (CCD cameras 81 and 82). The second register control device 103 controls the second register adjusting device 72 based on the detection result of the register mark detecting device 70 (CCD cameras 81, 82).

The register adjustment value calculation unit 201 calculates an adjustment value for misregistration in accordance with the change over time of the blanket attached to the blanket cylinder. Specifically, the register adjustment value calculation unit 201 calculates the next preset value for register adjustment based on a plurality of past adjustment values adjusted according to the change over time of the blanket. That is, the next preset value for register adjustment is calculated by learning based on a plurality of past adjustment values. Here, the misregister adjustment value (preset value for register adjustment) is a first adjustment value (preset value for register adjustment) for adjusting misregister in the vertical direction, and the first adjustment value (preset value for register adjustment) for adjusting misregister in the width direction. It includes a second adjustment value (preset value for second register adjustment) for In the following description, the adjustment value (register adjustment preset value) is the first adjustment value (first register adjustment preset value) or the second adjustment value (second register adjustment preset value).

Also, the register adjustment value calculation unit 201 is connected to the operation unit 202 , the display unit 203 , and the storage unit 204 . The operation unit 202 can input various data to the register adjustment value calculation unit 201 by being operated by the operator. The operation unit 202 is, for example, a keyboard or a touch-type display. The display unit 203 can display the processing details of the register adjustment value calculation unit 201 . The display unit 203 is, for example, a touch-type display, monitor, or printer.

The storage unit 204 stores various programs executed by the register adjustment value calculation unit 201 . The various programs also include a program for calculating a misregistration adjustment value in accordance with the aging of the blanket mounted on the blanket cylinder. Further, the storage unit 204 stores the past adjustment value acquired according to the change over time of the blanket and the next adjustment value calculated according to the change over time of the blanket. When carrying out register adjustment, the adjustment value differs according to the type and width of the web W and the like. Therefore, the storage unit 204 stores past adjustment values and next adjustment values for each type and width of the web W. FIG. Note that the adjustment value for register adjustment differs depending on the amount of ink on the web W, the amount of dampening water, the streak rate, and the like. Therefore, the storage unit 204 may store the past adjustment values and the next adjustment values for each of the amount of ink on the web W, the amount of dampening water, and the streak rate.

Note that the register adjustment value calculation unit 201 is a control device. A control device as the register adjustment value calculation unit 201 is a controller, and various programs stored in the storage unit 204 are executed by a CPU (Central Processing Unit) or an MPU (Micro Processing Unit), for example, using the RAM as a work area. It is realized by being executed.

The register adjustment value calculator 201 includes a data acquisition unit 210, a first register initial value calculator 211, a second register initial value calculator 212, a first register preset value calculator 213, and a second register preset value calculator. 214.

The data acquisition unit 210 acquires the first adjustment value after the vertical register adjustment from the first register control device 99 and acquires the second adjustment value after the fan-out adjustment from the second register control device 103 . In this case, the data acquisition unit 210 acquires a plurality of past first adjustment values and second adjustment values after register adjustment. The data acquisition unit 210 also acquires blanket exchange information.

The first register initial value calculation unit 211 calculates a first initial value to be used for the next upside-down registration based on a plurality of past first adjustment values acquired by the data acquisition unit 210 . The second register initial value calculation unit 212 calculates a second initial value to be used for the next fan-out adjustment based on the plurality of past second adjustment values acquired by the data acquisition unit 210 . As will be described later, the first initial value and the second initial value are set as register adjustment preset values when using a blanket that has not been worn immediately after being replaced. In this case, since the data acquisition unit 210 has acquired the past blanket replacement information, the data obtained immediately after the blanket replacement is obtained from the blanket replacement information and the plurality of past first adjustment values and second adjustment values. The first adjustment value and the second adjustment value can be calculated as the first initial value and the second initial value.

The first registration preset value calculation unit 213 calculates the first preset value to be used for the next top-to-bottom registration based on the plurality of past first adjustment values acquired by the data acquisition unit 210 . A second register preset value calculation unit 214 calculates a second preset value to be used for the next fan-out adjustment based on a plurality of past second adjustment values acquired by the data acquisition unit 210 . As will be described later, the first preset value and the second preset value are set as preset values for register adjustment when using a blanket that has become worn and thin due to the passage of time after replacement, not immediately after replacement. It is what is done.

As shown in FIG. 1, when printing is performed by the printing machine P, the paper feeding device R, the infeed device I, the printing device U, the web path device D and the folding machine F are operated. In the printer U, after the web W is threaded, the tension of the web W is adjusted by rotating the blanket cylinder or the like at a slow speed. Next, the rotation of the blanket cylinder or the like is accelerated, and at a predetermined adjustment speed, the paper surface inspection of the web W, the adjustment of the supply amount of dampening water, and the adjustment of the ink supply amount are performed. After completing various adjustments, the rotation of the blanket cylinder is accelerated again, and printing is performed at a predetermined cruising speed.

In a series of operations of the printing press P, register adjustment in the vertical direction and the width direction of the web W is performed. That is, as shown in FIG. 5, the blanket cylinder and the like are rotated at a slow speed, and the tension of the web W is adjusted. Further, the register adjustment value calculating unit 201 receives a first initial value or a first preset value as a first preset value for register adjustment, and a second initial value or a second preset value as a second preset value for register adjustment. A preset value is entered. Then, the first register adjustment device 71 individually moves the blanket cylinder and the plate cylinder to predetermined rotational phases based on the first register adjustment preset value. The second register adjustment device 72 also moves the plurality of pressure rollers to predetermined positions based on the second register adjustment preset value. After that, at a predetermined printing speed of the blanket cylinder or the like, the web W is inspected, the amount of dampening water supplied, and the amount of ink supplied are adjusted. Adjusting for misregistration, the second register adjustment device 72 adjusts for misregistration due to web W fan-out.

That is, the first register control device 99 uses the first initial value or the first preset value input from the register adjustment value calculation unit 201 as a reference, and the first register adjustment device 71 based on the captured images of the CCD cameras 81 and 82 . to correct vertical misregistration. Further, the second register control device 103 uses the second initial value or the second preset value input from the register adjustment value calculation unit 201 as a reference, and the second register adjustment device 72 based on the captured images of the CCD cameras 81 and 82 . to correct misregistration due to fanout. The second register adjusting device 72 may be controlled manually by the operator after visually confirming the misregister due to the fan-out, instead of being controlled based on the captured images of the CCD cameras 81 and 82 .

As the blanket attached to the blanket cylinder increases in frequency of use, the blanket becomes worn and becomes thinner, the conveying speed of the web W decreases, and the web W becomes misaligned. Also, the fan-out adjustment may not be properly performed. Therefore, the register adjustment value calculation unit 201 adopts the initial value as the preset value for register adjustment when using a blanket that has not been worn immediately after being replaced. On the other hand, the register adjustment value calculation unit 201 adopts a preset value as a preset value for register adjustment when using a blanket that has become worn and thin due to the passage of time after replacement.

FIG. 6 is a graph showing changes in adjustment values with respect to the wear amount of the blanket.

As shown in FIG. 6, the fan-out adjustment by the second register control device 103 reduces the pressing amount of the pressing roller against the web W as the blanket wears. When the web W stretches in the conveying direction (vertical direction), the length in the width direction (horizontal direction) becomes relatively short, and the generated fan-out, that is, the amount of extension in the width direction becomes smaller than expected. . Therefore, the pressing amount of the second register control device 103 and the pressing roller is decreased to reduce the pressing amount of the web. The calculation of the second preset value for register adjustment is the same as the calculation of the first preset value for register adjustment.

<Calculation of initial value>
FIG. 7 is a graph showing changes in register adjustment values for each blanket change.

As shown in FIGS. 5 and 7, the register initial value calculators 211 and 212 use the preset initial values as the next register adjustment preset values immediately after the blanket is replaced. In this case, the register initial value calculators 211 and 212 preferably use the average value of the past multiple initial values as the next register adjustment preset value when the blanket is replaced. That is, after the blanket is replaced, the blanket wears and becomes thinner, so the adjustment value at the time of register adjustment gradually increases. Since the blanket is replaced at times T1, T2, T3, and T4, the adjustment value during register adjustment at this time decreases. Therefore, for example, the initial value at time T4 is the average value of the initial values at times T1, T2, and T3.

<Calculation of preset value>
FIG. 8 is a table for explaining a method of calculating preset values for adjustment values.

As shown in FIGS. 5 and 8, the register preset value calculators 213 and 214 calculate the next preset value based on the past adjustment value after the replacement of the blanket, and the calculated preset value is the preset value for register adjustment. Use as value. Specifically, the register preset value calculation unit 213 sets the average value of a plurality of past adjustment values as the next preset value for register adjustment.

Several registration adjustments were performed after the blanket was changed on 3/7/2021. Here, for example, the next adjustment value on March 15, 2021 is the preset value (0.49), which is the average value of the past five adjustment values including the adjustment value on March 15, 2021 (0.49). adopted as Note that the number of past adjustment values used as the average value is not limited to five. Past adjustment values may vary depending on the skill level of the operator, etc. This variation can be eliminated by adopting the average value of the past multiple adjustment values as the adjustment value (preset value) to be used next time. can.

<First modification of calculation of preset value>
FIG. 9 is a graph illustrating a first modification of the method of calculating preset values for adjustment values.

As shown in FIGS. 5 and 9, the register preset value calculators 213 and 214 estimate the degree of change in the past adjustment value according to the frequency of use of the blanket, and perform the next adjustment based on the estimated degree of change in the adjustment value. Calculate the preset value of Specifically, the register preset value calculation units 213 and 214 calculate the degree of change in the adjustment value from the installation of the new blanket until the replacement, and based on the calculated average value of the degree of change in the adjustment value, the next Calculate the preset value of It should be noted that the degree of change includes an approximation formula set using previously acquired data on the frequency of use of the blanket and the adjustment value. This approximation can be used to calculate an adjustment value corresponding to the frequency of use of a particular blanket. Any known method can be applied to the method of setting the approximation formula.

That is, the degrees of change A1, A2, and A3 of the adjustment values from when a new blanket is installed to when it is replaced are obtained. By averaging the plurality of change degrees A1, A2, and A3 of the adjustment values, an average value Aa of the change degrees of the adjustment values is calculated. Then, using the average value Aa of the degree of change of the adjustment values, a preset value corresponding to the time after the new blanket is worn is obtained.

<Second Modification of Preset Value Calculation>
FIG. 10 is a graph for explaining a second modification of the method of calculating the preset value for the register adjustment value when the initial values are different.

As shown in FIGS. 5 and 10, the register preset value calculators 213 and 214 calculate the previous initial value when the deviation Ad between the previous initial value 1 and the current initial value 2 exceeds a preset initial The degree of change in the adjustment value is estimated between the value 1 and the previous final adjustment value, and the next preset value is calculated based on the degree of change between the initial value of this time and the estimated adjustment value.

That is, the adjustment value changes from the initial value 1 between the previous blanket replacement and the current blanket replacement. Then, when the initial value 2 after the current blanket replacement is input, the previous initial value 1 and the current initial value 2 are different. For example, the current initial value 2 may increase due to fluctuations in the fastening force of the blanket to the blanket cylinder. In this case, although the initial value 2 is larger this time, the amount of change in the adjustment value with respect to the elapsed time should be approximately the same as the previous time. Therefore, with respect to the previous initial value 1, the amount of change from the initial value with respect to the elapsed time, that is, the rate of change as the degree of change is calculated. Then, with respect to the current initial value 2, the next preset value is calculated using the calculated rate of change.

<Third Modification of Preset Value Calculation>
FIG. 11 is a graph illustrating a third modification of the method of calculating the preset value for the register adjustment value when the initial values are different.

As shown in FIGS. 5 and 11, the register preset value calculators 213 and 214 calculate the current initial value when the deviation Ad between the previous initial value 1 and the current initial value 2 exceeds a preset initial The degree of change in the adjustment value is estimated between value 2 and the previous final adjustment value, and the next preset value is calculated based on the estimated degree of change in the adjustment value.

That is, the adjustment value changes from the initial value of 1 to the maximum value between the previous blanket replacement and the current blanket replacement. Then, when the initial value 2 after the current blanket replacement is input, the deviation Ad from the previous initial value 1 may exceed the initial determination value and become large. For example, the current initial value 2 may increase due to fluctuations in the fastening force of the blanket to the blanket cylinder. In this case, although the initial value 2 is larger this time, the maximum value of the adjustment value should be almost the same as the previous final adjustment value (maximum value). Therefore, the degree of change in the adjustment value is estimated between the current initial value 2 and the previous final adjustment value (maximum value).

Specifically, the previous initial value 1 is set to +20, the previous final adjustment value (maximum value) is set to +100, and the current initial value is set to +50. The degree of change in the previous adjustment value is a curve that changes between the initial value 1 (+20) and the final adjustment value (+100). On the other hand, the degree of change in the current adjustment value is a curve that changes between the initial value 2 (+50) and the final adjustment value (+100). The curve representing the degree of change of the adjustment value this time is calculated by the following formula.

Amount of change from initial value 2 x (final adjustment value - initial value 2)/
(final adjustment value - initial value 1) + initial value 2
= Amount of change from initial value 2 × (100-50) / (100-20) + 50

The present embodiment and the first modified example are methods of calculating preset values when the initial values are the same, and the second and third modified examples are methods of calculating preset values when the initial values are different. . Which calculation method is to be used when the initial values are the same and when the initial values are different can be selected as appropriate.

Also, the curve representing the degree of change in the current adjustment value is not limited to the one calculated by the above formula, and may be one using machine learning (AI) such as deep learning, for example.

<Estimation of blanket replacement time>
FIG. 12 is a graph for explaining a method of estimating the blanket replacement timing based on the register adjustment value.

As shown in FIGS. 5 and 12, the print control apparatus 200 has a blanket replacement timing determination unit 205 . The replacement timing determination unit 205 is connected to the register adjustment value calculation unit 201 and the display unit 203 . Since the first adjustment value and the second adjustment value are input, the register adjustment value calculation unit 201 calculates the degree of change in the adjustment values (the first adjustment value and the second adjustment value) after the new blanket is installed. It is calculated and stored in the storage unit 204 . The replacement timing determination unit 205 compares the degree of change in the adjustment value input from the register adjustment value calculation unit 201 with a preset threshold value (adjustment determination value) to determine the replacement timing of the blanket. That is, when the adjustment value exceeds the threshold value (adjustment determination value), the replacement timing determination unit 205 determines that it is time to replace the blanket, and displays a warning prompting the replacement of the bracket on the display unit 203 .

The method for estimating the replacement timing of the blanket is not limited to the method described above. FIG. 13 is a graph for explaining a modification of the blanket replacement time estimation method based on the register adjustment value.

As shown in FIGS. 5 and 13 , the replacement timing determination unit 205 determines the basic adjustment values based on the degree of change of the plurality of adjustment values input from the register adjustment value calculation unit 201 (for example, by averaging). The degree of change (chain line in FIG. 13) is calculated. The replacement timing determination unit 205 compares the degree of change in the adjustment value input from the register adjustment value calculation unit 201 with the basic degree of change in the adjustment value to determine the replacement timing of the blanket. That is, when the reference amount of change Ac1 in the degree of change of the adjustment value from the initial value 1 exceeds the reference amount of change Ac0 from the initial value 0 in the degree of change in the adjustment value, the replacement time determination unit 205 determines that the blanket replacement time is reached. Then, a warning is displayed on the display unit 203 to prompt replacement of the bracket.

In the above-described embodiment, the calculation of the first register adjustment preset value in the vertical register adjustment has been described, but the calculation of the second register adjustment preset value in the fan-out adjustment can be similarly applied. Further, in the above-described embodiment, the estimation of the blanket replacement timing based on the register adjustment value in the vertical register adjustment has been described, but the estimation of the blanket replacement timing based on the register adjustment value in the fan-out adjustment is similarly applied. be able to.

<Print control method>
FIG. 14 is a flowchart for explaining the print control method of this embodiment.

The print control method of the present embodiment includes a step of acquiring a misregistration adjustment value as the blanket changes over time, and calculating the next adjustment value based on a plurality of adjustment values acquired as the blanket changes over time. and performing register adjustment based on the calculated adjustment value.

As shown in FIGS. 5 and 14, at the start of print preparation, printing unit U1 includes blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and plate cylinders 41a, 41b, 42a, 42b, 43a. , 43b, 44a, and 44b are spaced apart from each other, and the outer peripheral surfaces of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b are separated from the front and back surfaces of the web W.

After the web W is threaded through the printing machine 10, in step S11, the printing control device 200 drives and controls the drive motors 91, 92, 93, and 94 so that the blanket cylinders 31a, 31b, and 32a , 32b, 33a, 33b, 34a, 34b, plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, etc. are driven to rotate, and the operation of the printing press P is started. In step S12, the printing control device 200 controls the rotation speed of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b to reach a predetermined slow motion speed V1 (for example, a rotation speed range of 7 rpm to 10 rpm). Determine whether or not it has reached.

The printing control device 200 speeds up the printing press P when it determines (No) that the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have not reached the slow speed V1. On the other hand, when the print control device 200 determines that the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have reached the slow motion speed V1 (Yes), in step S13, the blanket cylinders The rotational speeds of 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b are maintained at slow motion speed V1.

In step S14, the print control device 200 determines whether or not the blanket has been replaced before starting operation. When the blanket has been replaced, the print control apparatus 200 receives blanket replacement information. When the printing control apparatus 200 determines that the blanket has been replaced in advance (Yes), in step S15, the first initial value is input as the first register adjustment preset value for vertical register adjustment, and step S16. , a second initial value is input as a second register adjustment preset value for fan-out adjustment. On the other hand, if the print control device 200 determines that the blanket has not been replaced in advance (No), in step S17, the first preset value is input as the first register adjustment preset value for vertical register adjustment. Then, in step S18, a second preset value is input as a second register adjustment preset value for fan-out adjustment. When the first register adjustment preset value is input, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and the plate cylinders 41a, 41b, 42a, 42b, 43a are rotated based on the input preset value. , 43b, 44a, 44b are individually moved to a predetermined rotational phase. Further, when the second register adjustment preset value is input, the plurality of pressure rollers 101 are moved to predetermined positions based on the input preset value.

Blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and plate cylinders 41a, 41b, 42a are controlled by the first register adjustment preset value and the second register adjustment preset value input for register adjustment. , 42b, 43a, 43b, 44a, 44b, and the pressure roller 101 are adjusted, the process of step S19 is performed. In step S19, the print control device 200 drives and controls the drive motors 91, 92, 93, and 94 so that the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b and the plate cylinders 41a and 41b , 42a, 42b, 43a, 43b, 44a, 44b are controlled to accelerate the operation. The print control unit 200 performs throw-on processing of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and operates the dampening unit and the ink supply unit during the acceleration operation.

In step S20, the print control device 200 controls that the rotation speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b reach a predetermined adjustment speed V2 (for example, a rotation speed range of 100 rpm to 250 rpm). determine whether or not If the printing control device 200 determines (No) that the rotation speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have not reached the adjustment speed V2, this state is maintained. On the other hand, when the print control device 200 determines that the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have reached the adjustment speed V2 (Yes), in step S21, the blanket cylinder 31a , 31b, 32a, 32b, 33a, 33b, 34a, and 34b are maintained at the adjustment speed V2.

Then, in step S22, the print control device 200 executes inspection of the web W while maintaining the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b at the adjusted speed V2. do. That is, the print control device 200 confirms whether the pattern on the web W is in an appropriate state, and adjusts the dampening water supply amount and the ink supply amount in step S23 as necessary.

Subsequently, in step S<b>24 , the print control device 200 controls the first register control device 99 to perform top-to-bottom register adjustment by the first register adjusting device 71 as first register adjustment. Then, in step S<b>25 , the print control device 200 controls the second register control device 103 to perform fan-out adjustment by the second register adjusting device 72 as the second register adjustment. At this time, the first registration control device 99 uses the first initial value or the first preset value input in advance as a reference so that the positions of the registration marks of the web W photographed by the CCD cameras 81 and 82 match each other. The top-to-bottom register adjustment is performed by the first register adjusting device 71 . In addition, the second register control device 103 controls the position of the register marks of the web W photographed by the CCD cameras 81 and 82 to coincide with the previously input second initial value or second preset value as a reference. 2 Perform fan-out adjustment by the register adjustment device 72 .

When the vertical register adjustment and the fan-out adjustment are completed, in step S26, the print control device 200 acquires the first adjustment value after the adjustment by the first register adjusting device 71. FIG. Then, in step S<b>27 , the print control device 200 acquires the second adjustment value after the adjustment by the second register adjustment device 72 .

In step S28, the print control device 200 drives and controls the drive motors 91, 92, 93, and 94 to drive the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b and the plate cylinders 41a and 41b. , 42a, 42b, 43a, 43b, 44a and 44b are accelerated. Then, in step S29, the print control device 200 controls that the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b reach a predetermined cruising speed V3 (for example, the range of 500 rpm to 750 rpm). determine whether it did.

If the print control device 200 determines (No) that the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have not reached the cruise speed V3, this state is maintained. On the other hand, when the print control device 200 determines that the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b have reached the cruising speed V3 (Yes), in step S30, the blanket cylinder 31a , 31b, 32a, 32b, 33a, 33b, 34a, and 34b are maintained at the cruising speed V3. Then, the printer P prints a predetermined number of copies.

In step S31, the print control device 200 determines whether or not the printer P has printed a predetermined number of copies. Here, if the printing control device 200 determines that the printer P has not printed the predetermined number of copies (No), it continues printing. On the other hand, when the printing control device 200 determines that the printing press P has printed the predetermined number of copies (Yes), it decelerates in step S32, and stops the printing press P in step S33.

In the above description, the print control apparatus 200 obtains the first adjustment value and the second adjustment value at the predetermined adjustment speed V2 after the top-to-bottom register adjustment and the fan-out adjustment are completed. The acquisition time of the value and the second adjustment value is not limited to this time. The print control device 200 performs register adjustment even after the top-to-bottom register adjustment and fan-out adjustment are completed. Therefore, the adjustment value may be obtained while the printing press P is running at the predetermined cruising speed V3 or after the printing press P is stopped.

<Description of Time Series in Print Control Method>
FIG. 15 is a time chart for explaining the print control method of this embodiment.

As shown in FIGS. 5 and 15, after the web W is threaded, at time t1, the print control device 200 starts operating the printing press P, and at time t2, the blanket cylinders 31a, 31b, 32a, The rotational speeds of 32b, 33a, 33b, 34a, and 34b reach a predetermined slow motion speed V1.

Between time t2 and time t3, the print control apparatus 200 inputs the first initial value or the first preset value as the first register adjustment preset value for vertical register adjustment, and also inputs the first preset value for fan-out adjustment. A second initial value or a second preset value is entered as a second register adjustment preset for . Similarly, between time t2 and time t3, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and the plate cylinders 41a, 41b, 42a, 42b, 43a are controlled based on the input preset values. , 43b, 44a, 44b are individually moved to predetermined rotational phases. Also, the plurality of pressure rollers 101 are moved to predetermined positions based on the input preset values. At time t4, the printing control device 200 accelerates the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b. . At time t5, the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b reach the predetermined adjustment speed V2. Then, the web W is inspected while the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b are maintained at the adjustment speed V2.

Subsequently, top-to-bottom register adjustment is performed by the first register adjusting device 71 and fan-out adjustment is performed by the second register adjusting device 72 . Then, when the vertical register adjustment and the fan-out adjustment are completed, at time t6, the first adjustment value after adjustment by the first register adjusting device 71 is acquired, and the value after adjustment by the second register adjusting device 72 is obtained. A second adjustment value is obtained.

At time t7, the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b and the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are accelerated. At time t8, the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b reach a predetermined cruising speed V3. Printing is performed in a state in which the rotational speeds of the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b are maintained at the cruising speed V3. At time t9, when the printing machine P prints a predetermined number of copies, the printing machine P is decelerated, and at time t10, the printing machine P is stopped.

[Action and effect of the present embodiment]
The print control apparatus according to the first aspect includes register adjusting devices 71 and 72 that adjust misregister in the transport direction or width direction of the web W, and register adjustment that calculates an adjustment value for the misregister in accordance with a change in the blanket over time. A value calculator 201 and register control devices 99 and 103 for controlling the register adjusting devices 71 and 72 based on the adjustment values calculated by the register adjustment value calculator 201 are provided.

According to the print control device of the first aspect, register adjustment is started using the misregister adjustment value corresponding to the change over time of the blanket. As the blanket is used for a long period of time, the surface of the blanket wears and gradually becomes thinner, and the transport speed of the web W fluctuates. As a result, the tension between the printing device and the folding machine changes, and the length of the web W in the transport direction (vertical direction) changes. In addition, when the web W is stretched in the conveying direction (vertical direction), the length in the width direction becomes relatively short. As a result, the generated fan-out, that is, the extension of the web W in the width direction becomes smaller than expected, and the second register adjustment device 72 does not properly perform the register adjustment, and the misregister due to the fan-out is corrected. may not be Therefore, when starting the register adjustment, by using an adjustment value corresponding to the change in the blanket over time, the register adjustment can be performed in a short time. Therefore, by shortening the register adjustment time, it is possible to reduce the amount of wasted paper and reduce the printing cost.

A print control apparatus according to a second aspect includes a first register adjusting device 71 that adjusts misregister in the conveying direction of the web W, and a second register adjusting device 72 that adjusts misregister in the width direction of the web W. . As a result, vertical misregistration and misregistration due to fan-out can be adjusted with high accuracy in a short time.

A print control apparatus according to a third aspect has a data acquisition unit 210 that acquires a plurality of past adjustment values after register adjustment in accordance with changes in the blanket over time. Thereby, it is possible to appropriately acquire a plurality of past adjustment values according to the change over time of the blanket.

In the print control apparatus according to the fourth aspect, the register adjustment value calculation unit 201 calculates the next preset value for register adjustment based on a plurality of past adjustment values acquired by the data acquisition unit 210 . This makes it possible to appropriately calculate the misregistration adjustment value based on a plurality of past adjustment values corresponding to changes in the blanket over time. The past adjustment values may vary depending on the operator's skill level, etc., and by using a plurality of past adjustment values, this variation can be eliminated and a stable preset value for register adjustment can be calculated.

In the print control apparatus according to the fifth aspect, the register adjustment value calculation unit 201 calculates the next preset value for register adjustment based on the past adjustment value after the replacement of the blanket acquired by the data acquisition unit 210 . As a result, it is possible to prevent the mixing of adjustment values that fluctuate due to replacement of the blanket, and to calculate the next preset value for register adjustment with high accuracy.

In the print control apparatus according to the sixth aspect, the register adjustment value calculation unit 201 sets the average value of a plurality of past adjustment values as the next preset value for register adjustment. Thereby, an appropriate adjustment value can be calculated.

In the print control apparatus according to the seventh aspect, the register adjustment value calculation unit 201 calculates the degree of change in the past adjustment value according to the frequency of use of the blanket, and based on the calculated degree of change in the adjustment value, the next Calculate preset values for register adjustment. Thereby, it is possible to calculate a preset value for register adjustment in consideration of wear of the blanket.

In the print control apparatus according to the eighth aspect, the register adjustment value calculation unit 201 calculates the degree of change in the adjustment value from when the new blanket is installed until it is replaced, and averages the calculated degree of change in the adjustment value. A preset value for the next register adjustment is calculated based on the value. As a result, a stable register adjustment preset value can be calculated.

In the print control apparatus according to the ninth aspect, the register adjustment value calculation unit 201 sets the preset initial value as the next register adjustment preset value in setting the register adjustment preset value immediately after the blanket is replaced. do. As a result, it is possible to calculate an appropriate preset value for register adjustment in consideration of the change in the adjustment value due to replacement of the blanket.

In the print control apparatus according to the tenth aspect, the register adjustment value calculation unit 201 calculates the average value of a plurality of past initial values for the next register adjustment in setting the register adjustment preset value immediately after the blanket is replaced. Preset value. Thereby, an appropriate preset value for register adjustment can be calculated.

In the print control apparatus according to the eleventh aspect, when the deviation between the previous initial value and the current initial value exceeds a preset initial determination value, the register adjustment value calculation unit 201 The degree of change in the adjustment value from the final adjustment value is calculated, and the next preset value for register adjustment is calculated based on the degree of change between the current initial value and the calculated adjustment value. Thereby, an appropriate preset value for register adjustment can be calculated.

In the print control apparatus according to the twelfth aspect, when the deviation between the previous initial value and the current initial value exceeds a preset initial determination value, the register adjustment value calculation unit 201 The degree of change in the adjustment value from the final adjustment value is calculated, and the next register adjustment preset value is calculated based on the calculated degree of change in the adjustment value. Thereby, an appropriate preset value for register adjustment can be calculated.

In the print control apparatus according to the thirteenth aspect, the register adjustment value calculation unit 201 calculates the degree of change in the adjustment value after mounting a new blanket, and compares the calculated degree of change in the adjustment value with the preset It has a replacement timing determination unit 205 that compares the adjustment determination value and determines the replacement timing of the blanket. As a result, by properly judging the replacement timing of the blanket, it is possible to eliminate the problem of register adjustment due to wear of the blanket.

The print control apparatus according to the fourteenth aspect has a storage unit 204 that stores a plurality of past adjustment values according to changes in the blanket over time and next adjustment values calculated according to changes over time in the blanket. This allows the next adjustment value to be used quickly.

A printing press according to a fifteenth aspect is a printing press P in which a plurality of printing units U1 to U5 are arranged at predetermined intervals along the vertical direction, and a web W is conveyed upward in the vertical direction. A controller 200 is provided. As a result, when starting register adjustment, the print control apparatus 200 can perform register adjustment in a short time by using an adjustment value corresponding to the change over time of the blanket. Therefore, by shortening the register adjustment time, it is possible to reduce the amount of wasted paper and reduce the printing cost.

A print control method according to a sixteenth aspect comprises the steps of: calculating a misregistration adjustment value according to a change in the blanket over time; and adjusting the misregistration in the transport direction or width direction of the web based on the adjustment value. have. As the blanket is used for a long period of time, the surface of the blanket wears and gradually becomes thinner, and the transport speed of the web W fluctuates. As a result, the tension between the printing device and the folding machine changes, and the length of the web W in the transport direction (vertical direction) changes. In addition, when the web W is stretched in the conveying direction (vertical direction), the length in the width direction becomes relatively short. As a result, the generated fan-out, that is, the extension of the web W in the width direction becomes smaller than expected, and the second register adjustment device 72 does not properly perform the register adjustment, and the misregister due to the fan-out is corrected. may not be Therefore, when starting the register adjustment, by using an adjustment value corresponding to the change in the blanket over time, the register adjustment can be performed in a short time. Therefore, by shortening the register adjustment time, it is possible to reduce the amount of wasted paper and reduce the printing cost.

In the above-described embodiment, the adjustment value is obtained according to the time after the new blanket is attached, but the method is not limited to this method. For example, the adjustment value may be obtained according to the cumulative number of revolutions of the blanket cylinder.

In the above-described embodiment, the top-to-bottom register adjustment by the first register adjusting device 71 and the fan-out adjustment by the second register adjusting device 72 are performed as the blanket changes over time, but the present invention is not limited to this. . As the blanket changes over time, the third register adjustment device 73 may perform left-right register adjustment.

Further, in the above-described embodiment, the register adjustment device, the register adjustment value calculation unit, and the register control device are provided to automatically adjust the register. may

Further, in the above-described embodiment, the printing control apparatus is applied to a newspaper offset rotary printing press, but it can also be applied to other printing presses.

21, 22, 23, 24 Stack 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b Blanket cylinder 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b Plate cylinder 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b Ink supply device 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b Dampening device 70 Register mark detection device 71 First register adjustment device 72 Second register adjustment device 73 Third register adjustment Devices 81, 82 CCD cameras 91, 92, 93, 94 Drive motors 95, 96, 97, 98 Top-bottom register motor 99 First register control device 101 Pressing roller (pressing member)
102 moving device 103 second register control device 104 support plate 105 screw shaft 106 support member 111, 112, 113, 114, 115, 116, 117, 118 left and right register motor 200 print control device 201 register adjustment value calculator 202 operation unit 203 Display unit 204 Storage unit 205 Replacement timing determination unit 210 Data acquisition unit 211 First register initial value calculator 212 Second register initial value calculator 213 First register preset value calculator 214 Second register preset value calculator P Offset for newspaper Rotary press (printing machine)
R paper feeding device R1 to R5 paper feeding unit I infeed device I1 to I5 infeed unit U printing device U1 to U5, U11 to U52 printing unit D web pass device D1 web pass unit F folding machine F1 folding unit W web

Claims (16)

a register adjusting device for adjusting misregister in the web transport direction or width direction;
a register adjustment value calculation unit that calculates a misregister adjustment value according to a change in the blanket over time;
a register control device that controls the register adjusting device based on the adjustment value calculated by the register adjustment value calculating unit;
A print controller comprising: The register adjusting device has a first register adjusting device that adjusts misregister in the conveying direction of the web, and a second register adjusting device that adjusts misregister in the width direction of the web.
The print control device according to claim 1. a data acquisition unit that acquires a plurality of past adjustment values after register adjustment in accordance with a change in the blanket over time;
3. The print control device according to claim 1 or 2. The register adjustment value calculation unit calculates a next preset value for register adjustment based on the plurality of past adjustment values acquired by the data acquisition unit.
4. The print control device according to claim 3. The register adjustment value calculation unit calculates a next preset value for register adjustment based on the past adjustment value after replacement of the blanket acquired by the data acquisition unit.
5. The print control device according to claim 3 or 4. The register adjustment value calculation unit uses an average value of the plurality of past adjustment values as a preset value for the next register adjustment,
6. The print control device according to claim 4 or 5. The register adjustment value calculation unit calculates a degree of change in the adjustment value in the past according to the frequency of use of the blanket, and calculates a next preset value for register adjustment based on the calculated degree of change in the adjustment value. ,
6. The print control device according to claim 4 or 5. The register adjustment value calculation unit calculates the degree of change in the adjustment value from when the new blanket is installed to when it is replaced, and performs the next register adjustment based on the calculated average value of the degree of change in the adjustment value. Calculate preset values for
The print control device according to claim 7. The register adjustment value calculation unit uses a preset initial value as the next register adjustment preset value in setting the register adjustment preset value immediately after the blanket is replaced,
The print control device according to any one of claims 1 to 8. The register adjustment value calculation unit sets the average value of the plurality of past initial values in the setting of the register adjustment preset value immediately after the blanket is replaced, as the next register adjustment preset value.
A print control device according to claim 9 . When the deviation between the previous initial value and the current initial value exceeds a preset initial judgment value, the register adjustment value calculation unit calculates the adjustment value between the previous initial value and the previous final adjustment value. calculating the degree of change, and calculating a preset value for the next register adjustment based on the degree of change between the current initial value and the calculated adjustment value;
The print control device according to any one of claims 1 to 8. When the deviation between the previous initial value and the current initial value exceeds a preset initial judgment value, the register adjustment value calculation unit calculates the adjustment value between the current initial value and the previous final adjustment value. calculating a degree of change, and calculating a preset value for the next register adjustment based on the calculated degree of change of the adjustment value;
The print control device according to any one of claims 1 to 8. The register adjustment value calculation unit calculates the degree of change in the adjustment value after the new blanket is installed, and compares the calculated degree of change in the adjustment value with a preset adjustment judgment value. Having a replacement timing determination unit that determines the replacement timing of the blanket,
The print control device according to any one of claims 1 to 12. a storage unit that stores a plurality of past adjustment values according to the change over time of the blanket and the next adjustment value calculated according to the change over time of the blanket;
The print control device according to any one of claims 1 to 13. In a printing press in which a plurality of printing units are arranged at predetermined intervals along the vertical direction and the web is conveyed upward in the vertical direction,
A print control device according to any one of claims 1 to 14 is provided,
Printer. calculating a misregistration adjustment value in response to a change in the blanket over time;
adjusting the misregistration in the transport direction or width direction of the web based on the adjustment value;
A print control method comprising:

Images