JP2004262067A - Overprinting apparatus of printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an overprinting system of a printing machine, which enables easy initial adjustment in overprinting without imposing a heavy load or an economic burden on an operator. <P>SOLUTION: This overprinting system is equipped with a plurality of printing units 2<SB>1</SB>-2<SB>6</SB>, a web unwinding part 3 and an in-feed part 4, an out-feed part 5 and a web winding part 6, and a DSP part for synchronously driving plate-cylinder driving servomotors 10<SB>1</SB>-10<SB>6</SB>of the respective printing units. At least one of the printing units serves as an overprinting unit, and the front and rear printing units, between which the overprinting unit is sandwiched, are set to serve as web feeding units. In the overprinting, the DSP part synchronously drives the plate-cylinder driving motor of the set overprinting unit and that of the web feeding unit. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reprinting device for a printing press for performing additional printing on a substrate (web) on which a pattern has already been printed.
[0002]
[Background]
Conventionally, in gravure printing or the like, there is a case where so-called reprint (overprint) printing is performed, in which additional printing is performed on a web on which a pattern has already been printed (pre-printed).
For example, in the case where prints having the same pattern and only partially different prints such as a store name, a manufacturer name, and a weighing for manufacturing are required, additional printing (overprinting) is performed. In this case, printing excluding different character portions and the like is collected in advance, and the total amount is completed, and if necessary, the plate cylinder in which only the different portions are made is used, and the additional printing is performed again on the printing press.
[0003]
By the way, in gravure printing for packaging, a stretchable film is often used as a web. When an easily stretchable film is used as the web, a rotary printing machine such as gravure printing is performed on the web while applying tension to the web, so the printing pitch for pre-printing and the printing pitch for follow-up printing are matched. It is difficult.
In other words, even if almost the same tension can be applied to the film in the first printing and the additional printing, it is difficult to completely reproduce the stretched state of the web that has already been printed and dried by the additional printing. Further, since a manufacturing error of the plate cylinder circumference for reprinting also occurs, it is difficult to match the preprinted printing pitch with the reprinting printing pitch in a stretched state.
[0004]
Conventionally, a registration operation for aligning a registration mark at the time of reprinting with a registration mark of a preprinted web is first provided on the side for supplying the web to the printing unit that performs overprinting and the side for winding the web. In addition, coarse adjustment is performed by adjusting the tension of the infeed portion and the outfeed portion, and fine adjustment is performed by moving a register correction roller provided on the upstream side of the web path with respect to the plate cylinder to increase or decrease the web path length. (For example, Patent Document 1).
[0005]
[Patent Document 1]
JP 2000-117950 A
[0006]
[Problems to be solved by the invention]
Since the registration work by moving the registration correction roller continuously corrects the printed pattern in which the web stretch is slightly negative or slightly positive, It will move gradually only in the direction (positive direction or negative direction). Eventually, when the registration correction roller reaches the stroke end, for the subsequent correction of the misregistration, the registration correction roller has deviated from the movement range, so that an uncorrectable situation is likely to occur.
[0007]
In order to avoid such a situation, in the initial adjustment, tension adjustment (coarse adjustment) is performed so that the movement range of the registration correction roller does not deviate from the fine adjustment range during continuous operation. However, it is extremely difficult to adjust the tension during the coarse adjustment, and it takes a lot of time.
As a method of reducing this time, it is conceivable to measure the printing pitch length of the preprinted web and make a plate cylinder for reprinting with a cylinder diameter corresponding to the measured printing pitch length, but this is expensive and not economical.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a reprinting apparatus for a printing press that can easily perform initial adjustment during reprint printing without imposing a great load on an operator and without burdening the operator. .
[0009]
[Means for Solving the Problems]
A reprinting device for a printing press according to the present invention includes a plurality of printing units each having a plate cylinder, an impression cylinder, a guide roller, and a plate cylinder driving motor for driving the plate cylinder, and arranged in a row. Reprinting of a printing press comprising a web supply mechanism for supplying a web to a printing unit, a web winding mechanism for winding the web, and an integrated control unit for synchronously driving plate cylinder driving motors of the plurality of printing units In the apparatus, at least one printing unit excluding the array end side printing unit among the plurality of printing units arranged in one row is set as a reprint printing unit, and printing before and after the reprint printing unit is sandwiched A reprint printing setting unit configured to set the unit as a web feed unit, and the integrated control unit performs the reprint printing setting during reprint printing. Wherein the synchronously drive the plate cylinder drive motors of overprinting printing unit and the web feeding unit set by means.
[0010]
According to this configuration, at least one printing unit is set as the additional printing unit among the plurality of printing units arranged in a row by the additional printing setting unit, and before and after sandwiching the additional printing unit. When the printing unit is set as the web feeding unit, the plate cylinder driving motors of the reprint printing unit and the web feeding unit are synchronously driven at a predetermined speed.
For this reason, the plate cylinder and the impression cylinder of the printing unit before and after the reprint printing unit set for reprint printing feeds the web across the web, that is, the reprint printing unit that performs reprint printing. When the web tension is adjusted using the most recent printing unit, the tension adjustment (rough adjustment) is performed at the infeed part or the outfeed part away from the reprint printing unit as before. Compared to, registration work can be performed easily and in a short time. Therefore, initial adjustment at the time of reprint printing can be easily performed without imposing a great load on the operator. Of course, it is not necessary to produce a plate cylinder in accordance with the printing pitch length of the preprinted web.
In particular, when the plate cylinder driving motors of the reprint printing unit and the web feed unit are driven synchronously, for example, there is a slight difference between the plate cylinder peripheral speed of the reprint printing unit and the plate cylinder peripheral speed of the web feed unit. In addition, when the plate cylinder driving motors of the reprint printing unit and the web feeding unit are synchronously driven at a predetermined speed, a tension change according to the plate cylinder peripheral speed difference is given to the web. Registration can be performed finely.
[0011]
In the above, it is desirable that the integrated control unit controls the plate cylinder peripheral speed of the web feeding unit at a preset ratio with respect to the plate cylinder peripheral speed of the follow-up printing unit.
According to this configuration, when the plate cylinder peripheral speed of the reprint printing unit is changed, the plate cylinder peripheral speed of the web feeding unit is changed at a preset ratio with respect to the plate cylinder peripheral speed. The tension applied to the web can be kept constant even when the plate cylinder peripheral speed of the printing unit changes. That is, the stability of the tension at the time of speed change, that is, the stability of the register can be improved.
[0012]
Further, each of the printing units is provided with plate cylinder peripheral speed ratio setting means for setting a ratio of the plate cylinder peripheral speed of each printing unit to the plate cylinder peripheral speed of the reprint printing unit that performs reprint printing. It is preferable that the control unit rotationally drives the plate cylinders of the reprint printing unit and the web feed unit at a ratio set by the plate cylinder peripheral speed ratio setting unit.
According to this configuration, since the plate cylinder peripheral speed ratio setting means is provided for each printing unit, when a reprint printing unit for performing reprint printing is set, printing before and after the reprint printing unit is set. From the plate cylinder peripheral speed ratio setting means corresponding to the unit, the ratio of the plate cylinder peripheral speed of each printing unit to the plate cylinder peripheral speed of the reprint printing unit can be set. Then, the integrated control unit rotationally drives the plate cylinders of the reprint printing unit and the web feed unit at the ratio set by each plate cylinder peripheral speed ratio setting means, so that the plate cylinder peripheral speed is set for each printing unit. It can be set arbitrarily.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a six-line straight gravure rotary printing press to which a reprinting device for a printing press according to the present invention is applied. The gravure rotary printing machine 1 includes six printing units 2 arranged in a row.₁~ 2₆With straight printing (web on these printing units 2₁~ 2₆And a function of performing six-color printing by continuous printing) and a function of performing additional printing using at least one printing unit.
Printing unit 2₁In the upstream side (the left side in FIG. 1), an unwinding unit 3 and an infeed unit 4 as a web supply mechanism are also provided.₆The outfeed part 5 and the winding part 6 as a web winding mechanism are respectively arranged on the downstream side (right side in FIG. 1).
[0014]
Each printing unit 2₁~ 2₆Are provided with a plate cylinder 7, an impression cylinder 8, and a plurality of rotation-free guide rollers 9, respectively, and a plate cylinder driving servo motor 10 for driving the plate cylinder 7.₁-10₆Is provided via a transmission gear (not shown). These servo motors 10₁-10₆According to each printing unit 2₁~ 2₆The plate cylinders 7 provided on the plate 1 can be driven independently.
[0015]
FIG. 2 shows a control system of the gravure rotary printing press 1. The drive control device 20 includes a DSP (digital signal processor) unit 21 that operates as an integrated control unit, a memory unit 22 that stores various data, and a plate cylinder servo controller (control circuit) 23.₁~ 23₆And a tension control unit 25 and an input / output I / F (interface) unit 26.
[0016]
The input / output I / F unit 26 includes an input device 27 serving as a reprint printing setting unit, a display device 28 such as a CRT, and each printing unit 2.₁~ 2₆Plate cylinder peripheral speed ratio setting unit 29 as plate cylinder peripheral speed ratio setting means provided for each₁~ 29₆And are connected to each other.
As shown in FIG. 3, the input device 27 includes ten keys “0”, “1” to “9”, a clear key “C”, an input key “input”, and a reprint printing unit designation key “reprint printing unit”. ”And web feed unit designation key“ web feed unit ”, cursor movement keys“ ← ”,“ ↑ ”,“ → ”,“ ↓ ”, print end key“ finished ”, and next job selection key“ next job selection ” Are arranged. Among these, the numeric keys “0”, “1” to “9”, the clear key “C”, the input key “input”, the reprint printing unit designation key “refresh printing unit”, and the web feed unit designation key “web feed”. Printing units 2 arranged in a row by "unit"₁~ 2₆Among them, the arrangement end side printing unit 2₁, 2₆At least one printing unit 2 excluding₂~ 2₅Is set as the reprint printing unit and the reprint printing unit 2₂~ 2₅Before and after the printing unit 2₁~ 2₆Can be set as a web feed unit.
Plate cylinder peripheral speed ratio setting device 29₁~ 29₆Each printing unit 2₁~ 2₆In FIG. 2, the registration mark is set in the vicinity of the plate cylinder 7 at a place where the registration marks for preprinting and reprinting can be seen. Further, structurally, as shown in FIG. 4, each printing unit 2 with respect to the plate cylinder peripheral speed of the reprint printing unit that performs reprint printing.₁~ 2₆The ratio of the plate cylinder peripheral speed can be changed by increasing or decreasing the speed.
[0017]
The memory unit 22 includes a reprint printing unit set by the input device 27 and the reprint printing unit 2.₂~ 2₅Web feed unit 2 before and after sandwiching₁~ 2₆Are stored, and various data (for example, plate cylinder diameters of the reprint printing unit and the web feeding unit) are stored.
[0018]
When the JOBNO, the reprint printing unit number, and the web feed unit number are input from the input device 27, the DSP unit 21 stores these data in the memory unit 22. Further, when an operation command and a speed command are given from the printing press control device 40, in the case of straight printing, the plate cylinder servo controller 23 of the printing unit that executes printing.₁~ 23₆At the same time, a single position command (rotation angle) signal is given. Further, in the case of reprint printing, the plate cylinder servo controller 23 of the set reprint printing unit and web feeding unit is set.₁~ 23₆Is given a position command signal.
[0019]
Further, the DSP unit 21 maintains a time interval according to the speed command during constant speed operation, and continuously sends a position command signal to the servo controller 23.₁~ 23₆To occur. At this time, the synchronization of the plate cylinders 7 is maintained by the software synchronization of the DSP unit 21. While accelerating and decelerating, the position command signal is continuously generated while maintaining the rate of change according to the acceleration time and deceleration time due to a predetermined angular acceleration, that is, the synchronization of the plate cylinders 7 by the software synchronization of the DSP unit 21. Maintain sex.
[0020]
Each plate cylinder servo controller 23₁~ 23₆The DSP 21 gives a speed command signal as a control target value. In response, the servo amplifier 30₁~ 30₆Drive signal corresponding to the command signal from the servo motor 10₁-10₆Output to the servo motor 10₁-10₆Encoder 12 connected to the shaft end of₁~ 12₆The rotation angle signal from the plate cylinder servo controller 23 serves as a position feedback signal.₁~ 23₆Is input. Plate cylinder servo controller 23₁~ 23₆Is a position loop 32 having a fixed period (servo system sampling period).₁~ 32₆It has a software servo function that controls each servo system.
[0021]
The tension control unit 25 includes a plate cylinder servo controller 23.₁~ 23₆Are driven synchronously by a tension control command signal from the DSP unit 21 in synchronism with the command signal. That is, the tension control unit 25 outputs a drive signal to the unwinding unit 3, the infeed unit 4, the outfeed unit 5, and the winding unit 6 based on the tension control command signal from the DSP unit 21 to control the web tension. I do.
[0022]
In the above configuration, in order to perform reprint printing, the printing units 2 arranged in a line are arranged.₂~ 2₅The printing unit for performing the reprint printing is set from among the printing units, and the printing units before and after the reprint printing unit are set as the web feed unit.
For example, printing unit 2₂As the reprint printing unit, the reprint printing unit 2₂Before and after the printing unit 2₁, 2₃Is set as a web feed unit by operating a numeric keypad, a reprint printing unit designation key “refresh printing unit”, a web feed unit designation key “web feed unit”, and the like on the input device 27. Then, the reprint printing unit number and the web feeding unit number are stored in the memory unit 22.
[0023]
In addition, reprint printing unit 2₂Before and after the printing unit 2₁, 2₃Plate cylinder peripheral speed ratio setting device 29₁, 29₃In the reprint printing unit 2₂Printing unit 2 for plate cylinder peripheral speed₁, 2₃Sets the ratio of the plate cylinder perimeter speed. Then, these ratios are stored in the memory unit 22.
[0024]
After the above preparation, a printed web is attached to the unwinding unit 3 and the printed web is attached to the printing unit 2.₁, 2₂, 2₃Through the winding part 6.
Here, after the initial phase adjustment is performed so that the registration marks of the first printing and the additional printing match, printing is started at the adjustment speed (low speed). After the start of printing, when the pre-print registration progresses with respect to the additional printing, the in-feed section side web feed unit (in this case, the printing unit 2)₁) Reduce the plate cylinder speed (peripheral speed). On the contrary, when the pre-printing is delayed with respect to the additional printing, the web feed unit on the infeed part side (in this case, the printing unit 2)₁) Increase the plate cylinder speed (peripheral speed).
[0025]
After completing these adjustments, the printing speed is increased to the normal operation speed and printing is continued. When the printing speed is increased to the normal operation speed, that is, the additional printing unit 2₂As the plate cylinder speed (peripheral speed) increases, the plate cylinder peripheral speed ratio setting device 29₁, 29₃Is a preset ratio, that is, a reprint printing unit 2₂Printing unit 2 for plate cylinder peripheral speed₁, 2₃The printing unit 2 at the ratio of the peripheral speed of the plate cylinder₁, 2₃Since the plate cylinder speed (peripheral speed) of the roller is changed, the speed is increased to the normal operation speed with a certain tension applied to the web.
As for fine adjustment at the time of reprint printing, desired registerability is maintained by adjusting the position of the register correction roller by an automatic register adjusting device (not shown).
[0026]
Here, the additional printing unit 2₂Web feed unit 2 before and after₁2₃Plate cylinder peripheral speed, follow-up printing unit 2₂The web tension T between the plate cylinder and the plate cylinder generated by the difference from the plate cylinder peripheral speed is expressed by the following equation.
T = {(V−U) / V} × A · E
U: Plate cylinder peripheral speed [m / sec] of the web feeding unit before and after the follow-up printing unit
V: Peripheral speed of plate cylinder of follow-up printing unit [m / sec]
A: Web cross-sectional area [mm²]
E: Web longitudinal elastic modulus [GPa]
[0027]
This is the reprint printing unit 2₂The plate cylinder peripheral speed is constant and the reprint printing unit 2₂Front and rear web feed unit 2₁, 2₃This shows that the web tension T between the plate cylinder and the plate cylinder can be changed by changing the plate cylinder peripheral speed. Furthermore, the reprint printing unit 2₂Front and rear web feed unit 2₁, 2₃This shows that the web tension T between the plate cylinder and the plate cylinder can be finely changed by slightly changing the plate cylinder peripheral speed.
[0028]
For example, additional printing unit 2 in units of 0.001%₂Front and rear web feed unit 2₁, 2₃In the case of changing the plate cylinder peripheral speed, a PET film having a web width of “1000 mm”, a web thickness of “25 μm”, and a web longitudinal elastic modulus of “4 GPa” can be adjusted in tension by “1N”.
This includes an infeed unit 4 and an outfeed unit 5 and a reprint printing unit 2.₂If no feed roller or the like is installed between the reprint printing unit 2 and₂The web tension before and after the plate cylinder 7 is directly affected by the tension control performance of the infeed unit 4 and the outfeed unit 5. Compared to this configuration, the configuration of this embodiment is an operation for register adjustment during reprinting. It shows that the performance is improved.
[0029]
Furthermore, the reprint printing unit 2₂Plate cylinder 7 and the front and rear web feed units 2₁, 2₃The plate cylinder 7 is synchronously driven, and the front and rear web feed units 2 are driven.₁, 2₃The plate cylinder peripheral speed of the reprint printing unit 2₂Is controlled by the ratio to the peripheral speed of the plate cylinder, so that the reprint printing unit 2₂Front / rear web feed unit 2 even when the cylinder peripheral speed is increased or decreased₁, 2₃Is controlled synchronously at the same ratio. For this reason, it is difficult for the web tension to fluctuate, and it is easy to maintain the register stability of follow-up printing.
[0030]
Here, the additional printing unit 2₂Front and rear web feed unit 2₁, 2₃The plate cylinder position command signal is obtained as follows.
From the plate cylinder diameter input means such as the input device 27 or the printing press control device 40 for controlling the printing press, the reprint printing unit 2₂Diameter of the plate cylinder "D_P"Reprint printing unit 2"₂Front and rear web feed unit 2₁, 2₃Diameter of the plate cylinder "D_F"Is input to the DSP unit 21.
Then, the DSP unit 21 sets a preset plate cylinder / plate cylinder driving servomotor speed ratio “G”._PThe following calculation is performed.
[0031]
D_F: Plate cylinder diameter of web feeding unit before and after reprint printing unit
G_P: Plate cylinder / speed ratio between servo motors for driving the plate cylinder
D_P: Plate cylinder diameter of follow-up printing unit
N_F: Servo motor speed for driving the plate cylinder of the web feed unit before and after the follow-up printing unit
N: Rotation speed of servo motor for driving plate cylinder of reprint printing unit
(= Plate cylinder servo motor position command: Command to give position change per unit time)
V: Web speed
As
Reprint printing unit 2₂Web speed V on the circumference of the plate cylinder
V = N · G_P・ ΠD_P...... (1)
Ask from.
[0032]
In addition, reprint printing unit 2₂Front and rear web feed unit 2₁, 2₃The plate cylinder circumferential speed is the same as the web speed V.
V = N_F・ G_P・ ΠD_F(2)
Ask from. Therefore, from the equations (1) and (2),
N_F= ND_P/ D_F
K = D_P/ D_F
A constant K is obtained as follows.
[0033]
In response to the speed command from the printing press control device 40, the DSP unit 21 obtains a position command (rotation angle) signal (command to give a position change per unit time), and reprints it.₂Plate cylinder servo controller 23₂To give. Further, the reprint printing unit 2 from the constant K₂Front and rear web feed unit 2₁, 2₃Plate cylinder servo controller 23₁, 23₃The position command signal to be given to the web feed unit 2 is obtained.₁, 2₃Plate cylinder servo controller 23₁, 23₃To give.
[0034]
According to this embodiment, the following effects can be expected.
(1) A plurality of printing units 2 arranged in one row₁~ 2₆At least one printing unit 2₂Is set as the reprint printing unit and the reprint printing unit 2₂Before and after the printing unit 2₁, 2₃Is set as the web feed unit, these additional printing units 2₂And web feed unit 2₁, 2₃Servo motor 10 for driving the plate cylinder₁, 10₂, 10₃Are driven synchronously at a predetermined speed.
Therefore, additional printing unit 2₂Before and after the printing unit 2₁, 2₃The plate cylinder 7 and the impression cylinder 8 feed the web across the web, that is, the reprint printing unit 2 that performs reprint printing.₂The most recent printing unit 2 for₁, 2₃Since the web tension is adjusted using the, the registration work is performed compared to the conventional case where the tension adjustment (rough adjustment) is performed at the infeed part or the outfeed part away from the reprint printing unit. It can be carried out easily and in a short time. Therefore, initial adjustment at the time of reprint printing can be easily performed without imposing a great load on the operator. Of course, it is not necessary to produce a plate cylinder in accordance with the printing pitch length of the preprinted web.
[0035]
(2) Reprint printing unit 2₂And web feed unit 2₁, 2₃Servo motor 10 for driving the plate cylinder₁, 10₂, 10₃Are driven synchronously, for example, the reprint printing unit 2₂Plate cylinder peripheral speed and web feed unit 2₁, 2₃Reprint printing unit 2 so that there is a slight difference in the peripheral speed of the plate cylinder₂And web feed unit 2₁, 2₃Servo motor 10 for driving the plate cylinder₁, 10₂, 10₃When these are driven synchronously at a predetermined speed, a tension change according to the plate cylinder circumferential speed difference acts on the web, so that the registration can be finely performed according to the tension change.
[0036]
(3) The DSP unit 21 is connected to the web feed unit 2₁, 2₃Reprint printing unit 2₂Since it is controlled at a preset ratio with respect to the plate cylinder peripheral speed, the reprint printing unit 2₂When the plate cylinder circumferential speed is changed, the web feed unit 2 is set at a preset ratio with respect to the plate cylinder circumferential speed.₁, 2₃Because the speed of the plate cylinder is changed, the additional printing unit 2₂The tension applied to the web can be kept constant even when the plate cylinder circumferential speed changes. That is, the stability of the tension at the time of speed change, that is, the stability of the register can be improved.
[0037]
(4) Printing unit 2₁~ 2₆Each printing unit 2 with respect to the plate cylinder peripheral speed of the reprint printing unit that performs reprint printing every time.₁~ 2₆Plate cylinder peripheral speed ratio setting device 29 for setting the ratio of the plate cylinder peripheral speed₁~ 29₆Is provided, the reprint printing unit 2 for performing reprint printing.₂Is set, the reprint printing unit 2₂Before and after the printing unit 2₁, 2₃Plate cylinder peripheral speed ratio setting device 29 corresponding to₁~ 29₆From reprint printing unit 2₂Printing unit 2 for plate cylinder peripheral speed₁, 2₃The ratio of the plate cylinder peripheral speed can be set. Then, the DSP unit 21 is connected to the plate cylinder peripheral speed ratio setting device 29.₁~ 29₆Overprint unit 2 at the ratio set in₂And web feed unit 2₁, 2₃Since each plate cylinder is driven to rotate, each printing unit 2₁~ 2₆The peripheral speed of the plate cylinder can be arbitrarily set for each time.
[0038]
Note that the present invention is not limited to the printing press described in the above embodiments, and includes the following modifications.
In each of the above embodiments, the printing units 2 arranged in a line.₁~ 2₆One additional printing unit 2₂However, the number is not limited to one and may be two or more. In this case, the printing units before and after the plurality of additional printing units may be set as the web feed unit.
[0039]
Further, the tension control unit 25 is not limited to the configuration of the above-described embodiment, and may be any configuration as long as it can apply a desired tension to the web.
Further, the impression cylinder 8 has a structure in which the web contacts with the web and rotates according to the running of the web. This is also driven independently for each printing unit in the same manner as the plate cylinder 7, and these are controlled synchronously by the DSP 21. It may be.
[0040]
The guide roller 9 also has a structure that contacts the web and rotates as the web travels. However, these guide rollers 9 can also be rotated independently, and the peripheral speeds of the plate cylinder 7 and the impression cylinder 8 can be determined. You may make it synchronize. In this case, the guide roller 9 and the plate cylinder 7 or the guide roller 9 and the impression cylinder 8 may be connected, and the drive source of the plate cylinder 7 or the impression cylinder 8 may be used as the drive source of the guide roller 9.
[0041]
【The invention's effect】
According to the reprint apparatus for a printing press of the present invention, initial adjustment at the time of reprint printing can be easily performed without imposing a great load on the operator and without placing an economical burden.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing a gravure rotary printing press according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a control system of the gravure rotary printing press according to the embodiment.
FIG. 3 is a diagram showing an input device according to the embodiment;
FIG. 4 is a diagram showing a plate cylinder peripheral speed ratio setting device according to the embodiment;
[Explanation of symbols]
1 Rotary printing press
2₁~ 2₆  Printing unit
3 Unwinding part (web supply mechanism)
4 In-feed section (web supply mechanism)
5 Outfeed (web winding mechanism)
6 Winding part (web winding mechanism)
7 Plate cylinder
8 impression cylinder
9 Guide roller
10₁-10₆  Plate cylinder drive servo motor (plate cylinder drive motor)
12₁~ 12₆  Encoder
21 DSP unit (integrated control unit)
22 memory
23₁~ 23₆  Plate cylinder servo controller
25 Tension control unit
27 Input device (reprint printing setting means)
29₁~ 29₆  Plate cylinder peripheral speed ratio setting device (plate cylinder peripheral speed ratio setting means)

Claims (3)

A plurality of printing units each having a plate cylinder, an impression cylinder, a guide roller, and a plate cylinder driving motor for driving the plate cylinder, and a web supply mechanism for supplying webs to the plurality of printing units; In a reprinting apparatus for a printing press comprising a web winding mechanism for winding the web, and an integrated control unit that synchronously drives plate cylinder driving motors of the plurality of printing units.
Among the plurality of printing units arranged in one row, at least one printing unit excluding the arrangement end side printing unit is set as the reprint printing unit, and the printing units before and after the reprint printing unit are set as the web. A reprint printing setting means to set as a feed unit is provided.
In the reprint printing, the integrated control unit synchronously drives the plate cylinder driving motors of the reprint printing unit and the web feed unit set by the reprint printing setting unit. . In the reprint apparatus for a printing press according to claim 1,
The integrated control unit controls the plate cylinder peripheral speed of the web feed unit at a preset ratio with respect to the plate cylinder peripheral speed of the reprint printing unit. In the reprinting device for a printing press according to claim 1 or 2,
For each of the printing units, plate cylinder peripheral speed ratio setting means for setting a ratio of the plate cylinder peripheral speed of each printing unit to the plate cylinder peripheral speed of the reprint printing unit that performs reprint printing is provided,
The reprinting apparatus for a printing press, wherein the integrated control unit rotationally drives the plate cylinders of the reprint printing unit and the web feed unit at a ratio set by the plate cylinder peripheral speed ratio setting unit.

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