JPS6326705B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plate cylinder register correction control device for a multicolor rotary press. In general, a multicolor rotary press supplies the web to a folding machine from a paper feed section loaded with the web to be printed, and multiple printing sections are provided between the paper feed section and the folding machine to cover the surface of the running web. Multicolor printing is performed by sequentially overlapping each color in each printing section. Such multicolor rotary presses are equipped with a plate cylinder registration correction device that registers the position of the plate cylinder so that each color is correctly overlapped in the vertical and horizontal directions of the web in each printing section. . The reason for this is that when assembling a multicolor rotary press, the positions of the plate cylinders provided in each printing section are set to standard values with a predetermined accuracy in the running direction of the web and in the direction orthogonal to the running direction. There is. However, when the plates on the surface of the plate cylinder are replaced in accordance with printing specifications, misalignment occurs between the plates, making it impossible to print with correct color matching. Therefore, when replacing the printing plate, the printing cylinder of each printing section is returned to a preset reference position using the printing cylinder register correction device. Therefore, when the output of the potentiometer provided in the above-mentioned register correcting device is displayed on an analog or digital meter, and the operator relies on his intuition while monitoring the meter, the color deviates, that is,
When a misregistration occurs, the misregistration is corrected by operating an operation switch to drive a misregistration motor. In other words, the end point of register correction is
It was determined by the operator's release of the operating switch. For this reason, in order to accurately and quickly correct the minute position of the plate cylinder by a predetermined value, the operator's advanced skills are required. Quality was affected. The present invention has been made in view of these points, and provides a multicolor rotary press that can accurately and quickly correct extremely minute positional deviations of the plate cylinder by the amount of deviation without the need for advanced technology. A plate cylinder register correction control device is provided. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a schematic configuration of a plate cylinder register correction control device for a multicolor rotary press according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a take-up roll on which a web 2 to be printed in multiple colors is mounted. Next to the take-up roll 1, a drying mechanism 6, a cooling mechanism 7, and a folding machine 8 are installed in this order. The web 2 mounted on the take-up roll 1 is guided from an infeed roller 3 to a folding machine 8 through a first printing section 4 and the like in sequence. The first printing section 4 includes plate cylinders 9 and 10 equipped with plates.
A pair are provided on both sides of the web 2 so as to face each other. Between this pair of plate cylinders 9 and 10,
A pair of blank cylinders 11 and 12 to which the printed patterns of the respective plate cylinders 9 and 10 are transferred are provided so as to sandwich the web 2 therebetween. The second printing section 5 includes a pair of plate cylinders 13 and 14 and this plate cylinder 1, similarly to the first printing section 4.
a blank cylinder 15 to which the printed patterns No. 3 and 14 are transferred;
A pair of webs 16 are provided so as to sandwich the web 2 therebetween. The first printing section 4 and the second printing section 5 include
Register correction amount transmission mechanisms 17a and 17b that change the positions of the plate cylinders 9, 10, 13, and 14 back and forth along the running direction of the web 2, and register correction that changes the positions of the plate cylinders 9, 10, 13, and 14 along the direction orthogonal to the running direction of the web 2. Amount transmission mechanisms 17c and 17d are provided. These register correction amount transmission mechanisms 17a...17d
have substantially the same structure and operation, so the register correction amount transmission mechanism 17a provided in the first printing section 4 will be explained with reference to FIGS. 2 to 4. , other register correction amount transmission mechanism 17b
...Description of 17d will be omitted. In the figure, 18 is a power transmission shaft that transmits power for driving the pair of plate cylinders 9 and 10. The transmission shaft 18 is
Gear box 18b attached to printing frame 18a
(See Figure 3). The transmission shaft 18 is connected to the infeed 3, the second printing section 5, the cooling mechanism 7, and the folding machine 8, and is driven by a main drive motor (not shown). That is, the pair of plate cylinders 9 and 10 are connected to the transmission shaft 18 by a transmission mechanism (not shown), and are always mutually connected at a constant speed independently of the register correction amount transmission mechanism 17a described below. It's starting to work together. Gears 19 and 20 are fixed to the outer peripheral surface of the shaft of each plate cylinder 9 and 10. Further, plate cylinder gears 9a and 10 (see FIG. 3) are fixed to the ends of the outer circumferential surfaces of the shafts of the respective plate cylinders 9 and 10. Gears 19 and 20 are plate cylinder gears 9a and 10.
It meshes with a and is in sliding contact for forward and reverse rotation. The shafts of gears 19 and 20 are rotatably attached to brackets 21B and 22B. Bracket 21B,
22B is the shaft 2 attached to the printing frame 18a.
It is rotatable with 1C and I as the respective axes.
Gears A and C that are in sliding contact with the gears 19 and 20 are attached to the shafts 21C and I, respectively. 21, 22
is the swing arm. swing arm 2
One end portions of plates 1 and 22 are connected to the outer peripheral surfaces of plate cylinders 9 and 10 via gears 19 and 20, respectively. The other ends of the swing arms 21 and 22 have eccentric shafts 23 and 24.
It is connected to register correction motors 25, 26 via worms 23B, 24B and worm gears 23A, 24A attached to the registers. The swing arms 21 and 22 have pivot points A ₁ and A ₂
Arms 21A, 22A having
The gears 19 and 20 are rotatably supported at one end thereof, and the brackets 21B and 22B are connected to pivot points A ₁ and A ₂ at the other end. That is, when the worm gears 23A, 24A are rotated by the drive of the register correction motors 25, 26, the arms 21A, 24A are rotated through the eccentric shafts 23, 24.
2A reciprocates while freely bending, and the arm 21
Bracket 21 connected to the other end of A, 22A
It is designed to swing around C and 22C.
Therefore, the gears 19 and 20 attached to the other ends of the brackets 21B and 22B are connected to the bracket 21.
According to the rocking of B and 22B, rotational force is applied in the clockwise or counterclockwise direction in FIG. This rotational force is transmitted from the gears 19 and 20 to the plate cylinders 9 and 10 via the plate cylinder gears 9A and 10A, so that the positions of the plate cylinders 9 and 10 change back and forth along the conveyance direction of the web 2. ing. The register correction motors 25 and 26 include
A drive control circuit 50 (described later) for controlling the drive is connected thereto. Note that the register correction motors 25 and 26 are attached to the printing frame 18a. The rotating shafts of the register correction motors 25 and 26 are provided with a disc-shaped proximal body 25b.
is fitted. At the peripheral part of the proximal body 25b,
The detection portions of a pulse generator 25a that generates pulses according to the rotational speed of the rotating shaft are installed to face each other. A drive control circuit 50 that controls the drive of the register correction motors 25 and 26 is electrically connected. Here, the register correction operation of the positions of the plate cylinders 9 and 10 by the register correction amount transmission mechanism 17a will be explained with reference to FIGS. 4A and 4B. Note that, in order to simplify the explanation, Figures A and B only show the case of the plate cylinder 9 printing on the front side of the web 2. Now, the arm gear 23b is connected to the register correction motor 25.
Assume that the swing arm 21 is rotated by the swing arm 21 and pushed out as shown in FIG. 4A. Bracket 21
The gear A attached to B is bent at a pivot point _A1 with the shaft H as the center of rotation, and rotates the end of the bracket 21B clockwise _X1 in the drawing. For this reason, the gear 19 is
Since it is in contact with the plate cylinder gear 9a, a clockwise rotational force acts on the continuously rotating plate cylinder 9. As a result, the position of the plate cylinder 9 is changed by a predetermined amount in the clockwise rotation direction. On the other hand, suppose that the swing arm 21 is pulled back toward the worm gear 23b as shown in FIG. 4B due to the rotation of the worm gear 23b. This time, the swing arm 21 side of the bracket 21B is pulled up and the gear 19 side is pulled down with the shaft 21C as the center of rotation. For this reason, the bracket 21B is
Perform a left rotation X ₂ on the drawing about axis H. As a result, a force in the counterclockwise rotation direction is applied to the continuously rotating plate cylinder 9 via the gear 19 and the plate cylinder gear 9a. Therefore, the plate cylinder 9 advances the position of the printed content by a predetermined counterclockwise rotation. Next, the drive control circuit 50 will be explained with reference to FIG. Note that the drive control circuits 50 connected to the register correction motors 25 and 26 of the first printing section 4 and the second printing section 5 have the same configuration, so here A drive control circuit 50 having a function of adjusting the position of the web 2 back and forth along the running direction of the web 2 will be described. The drive control circuit 50 includes a forward switch 51 that rotates the register correction motor 25 forward (to advance the position of the plate cylinder along the web running direction) and a forward switch 51 that rotates the register correction motor 25 in the reverse direction (to advance the position of the plate cylinder along the web running direction). A reversing switch 52 is provided for retarding the speed. The output of the forward switch 51 is sent to the second AND circuit 5.
The signal is supplied to a second NOT circuit 55 and a first AND circuit 53 which are connected to 4. The output of the reverse switch 52 is supplied to a first NOT circuit 56 connected to a first AND circuit 53 and a second AND circuit 54. The first AND circuit 53 and the first NOT circuit 56 and the second AND circuit 54 and the second NOT circuit 55 each constitute a NOT circuit. In other words, the first AND circuit 53 outputs a signal only when the forward switch 51 is operated. In addition, the reverse switch 52
The second AND circuit 54 outputs a signal only when . The output of the first AND circuit 53 is the first memory 57
Then, the output of the second AND circuit 54 is sent to the second memory 58.
It is now being supplied to each country. The outputs of the first memory 57 and the second memory are supplied to a drive amplifier 59 and an OR circuit 60. The drive amplifier 59 controls the rotation direction of the register correction motor 25, and causes the register correction motor 25 to rotate in the forward direction when the output of the first memory 57 is supplied, and when the output of the second memory 58 is supplied. When this happens, the register correction motor 25 is made to rotate in the opposite direction. The drive amplifier 59 includes
A high-speed input terminal 59a that rotates the register correction motor 25 at high speed and a low-speed input terminal 5 that rotates it at low speed.
9b is installed. The output of the OR circuit 60 is a third AND circuit 61 that forms a negative circuit between the high-speed input terminal 59a of the drive amplifier 59 and the low-speed input terminal 59b for low-speed rotation, and a third AND circuit 61 that detects the rotation speed of the register correction motor 25. The signal is supplied to a first counter 62 which is 1 subtraction means. The first counter 62 is supplied with the output of a pulse generator 25a attached to the register correction motor 25. The first counter 62 sends a signal corresponding to the minimum value of the least digit of the first counter 62 to a second counter 63, which is a second subtraction means, every time the number of pulses supplied from the pulse generator 25a reaches a set number. is now output. The second counter 63 is set to a value corresponding to the amount of register correction of the plate cylinder to be corrected by the register correction motor 25 when the operator corrects the register. As a result, the second counter 63 has a function of subtracting the set value one by one when a signal is input from the first counter 62. Second
The counter 63 is composed of, for example, a solenoid valve counter. The second counter 63 inputs the high-speed input terminal 59 when the set value reaches the minimum digit due to subtraction.
A signal is supplied to the third not circuit 64 of the NOT circuit provided at the low speed input terminal 59b, and an erase signal is supplied to the first memory 57 and the second memory 58 when the set value becomes zero. It's getting old. According to the registration correction control device for a multicolor rotary press configured as described above, the plate cylinders 9, 10, 1 are adjusted as follows.
The positions of 3 and 14 can be automatically corrected. In order to simplify the explanation , the registration correction of the front and rear positions of the plate cylinder 9 provided at the upper part of the first printing section 4 along the running direction of the web 2 will be explained with reference to the drive control circuit 50 described above. do. For example, when changing the position of the plate cylinder 9 forward by 0.13 mm along the running direction of the web 2, the operator first sets the set value of the second counter 63 to 13. At this time, the first counter 62 has already detected the minimum value of the second counter 63 when the register correction motor 25 changes the position of the plate cylinder 9 by 0.01 mm and supplies a predetermined pulse from the pulse generator 25a to the first counter 62. It is adjusted to output a signal corresponding to the minimum value of the digit. Next, the forward switch 51 is turned on. The output of the forward switch 51 is supplied to a first AND circuit 53 constituting a NOT circuit. First AND circuit 53
When receiving the signal from the forward switch 51, the first
A signal is output to memory 57. First memory 57
supplies the drive amplifier 59 with a signal for forward rotation of the register correction motor 25 (rotation for advancing the position of the printing cylinder shown in FIG. OR circuit 60
receives the signal from the first memory 57 and supplies the signal to the first counter 62 and the third AND circuit 61. At this time, the third NOT circuit 64 does not receive a signal from the second counter 63, so it outputs an ON signal to the third AND circuit 61. The third AND circuit 61 outputs a signal to the high-speed input terminal 59a. As a result, the drive amplifier 59 causes the register correction motor 25 to rotate at a high speed in the forward direction. When the register correction motor 25 rotates forward, the swing arm 21 shown in FIG. It is transmitted as an increasing force. Therefore, the position of the plate cylinder 9 changes to a value forward along the running direction of the web 2.
The amount of register correction of the plate cylinder 9 at this time is supplied to the first counter 62 as a pulse signal from the pulse generator 25a by the proximity plate 25b attached to the register corrector motor 25 based on the rotational speed of the register corrector motor 25. The first counter 62 counts the number of pulse signals from the pulse generator 25a corresponding to the minimum value of the least digit of the second counter 63, in this case, the second counter 62.
3 is set to 0.13, a signal is supplied to the second counter 63 every time the value reaches 0.01. The second counter 63 subtracts the set value every time it receives a signal from the first counter 61, and when the set value reaches the value of the least digit (in this case, 9 when 0.13 becomes 0.09), the second counter 63 subtracts the set value. A signal is supplied to the 3-knot circuit 64.
As a result, since the output of the third NOT circuit 64 is stopped, the third AND circuit 61 constituting the NOT circuit stops outputting, and the second counter 63 outputs the signal from the drive amplifier 5.
A signal is supplied to the low speed input terminal 59b of No.9.
When a signal is supplied to the low speed input terminal 59b, the drive amplifier 59 causes the register correction motor 25 to rotate forward at a low speed. The plate cylinder 9 is rotated at low speed by the registration correction motor 25.
The position gradually changes to the position set by the second counter 63 by the action of the register correction amount transmission mechanism 17a shown in FIG. 2, as described above. When the position of the plate cylinder 9 coincides with the predetermined position, the set value of the second counter 63 becomes zero by the signal supplied to the second counter 63 via the pulse generator 25a and the first counter 62. Become. When the set value of the second counter 63 becomes zero, the second counter 63 supplies an erase signal to the first memory 57.
Therefore, when the memory in the first memory 57 is erased and no signal is supplied to the drive amplifier 59, and the operation of the drive control circuit 50 is stopped, the position of the plate cylinder 9 is set to a predetermined position. Further, when changing the position of the plate cylinder 9 backward by 0.05 mm along the running direction of the web 2, the set value of the second counter 63 is set to 5. At this time, already
A signal corresponding to the minimum value of the minimum digit of the first counter 63 is supplied in accordance with the output of the pulse generator 25a. Next, the reverse switch 52 is turned on. The output of the backward switch 52 is supplied to a second AND circuit 54, and the second NAND circuit 54 supplies a predetermined signal to a second memory 58. The second memory 58 supplies a predetermined signal to the first counter 62 via an OR circuit 60. At this time, the set value of the second counter 63 is a single digit 0.05 in this example, which is the smallest digit, so the second counter 63 supplies a predetermined signal to the low speed input terminal 59b of the drive amplifier 59. As a result, the register correction motor 25 rotates in the reverse direction at a low speed in response to the output of the drive amplifier 59, and the position of the plate cylinder is changed to the second counter 63 by the register correction amount transmission mechanism 17a in an operation similar to that described above. Change to the position set by . When the position of the plate cylinder 9 reaches the value set by the second counter 63, the set value of the second counter 63 becomes zero, and the second counter 63 transfers the erase signal to the second memory 5.
8, and the operation of the drive control circuit 50 is stopped. In this way, the operator can quickly perform extremely precise registration correction work simply by measuring the misregistration of the printed product, setting the set value in the second counter 63, and pressing the forward switch 51 or the backward switch 52. can. As a result, according to this plate cylinder register correction control device for a multicolor rotary press, it is possible to improve printing quality. In addition, in the embodiment, registration correction of the front and rear plate cylinders 9 along the running direction of the web 2 has been explained, but this multicolor rotary press is substantially the same as the drive control circuit 50 described above, although drawings and explanations are omitted. It is equipped with a drive control circuit having the following configuration, and controls the registration correction amount transmission mechanism 17c of the first printing section 4 and the registration correction amount transmission mechanism 17d of the second printing section 5 to
It has a function of correcting the positions of 0, 13, and 14 back and forth along the direction orthogonal to the conveying direction of the web 2. That is, the register correction amount transmission mechanism of the first printing section 5 has a main part structure as shown in FIG. 6, for example. In FIG. 6, both bearings of the plate cylinder 9 are sliding bearings 9C 1 and 9 that move in the axial direction, which are attached to the frames _9B and 9C of the first printing section 5.
It is rotatably supported by C ₂ , and the plate cylinder 9
A gear 19 fixed to the bearing end of the blank cylinder 11 meshes with the plate cylinder gear 9A fixed to the bearing end of the blank cylinder 11. On the other hand, a gear 9D is screwed into the threaded portion of the other sliding bearing _9C2 of the plate cylinder 9.
is meshed with a shaft gear 9F which is rotatably supported via a bracket 9E fixed to the frame 9C. Worm gear 9G is gear with shaft 9F
This gear 9G is driven using register correction motors 25, 26 similar to those shown in FIG. When the worm gear 9G is rotated by driving the register correction motor, the gear 9D rotates via the shafted gear 9F, and the gear 9D and the sliding bearing 9 rotate.
Since C ₁ and 9C ₂ move in the axial direction of the plate cylinder 9,
The position of the plate cylinder 9 is adapted to change in a direction perpendicular to the direction in which the web 2 is conveyed. Furthermore, it goes without saying that the unit of the set value of the second counter 63 can be set as appropriate, such as millimeters or inches, depending on the standard of the multicolor rotary press. As explained above, according to the register correction control device for a multicolor rotary press according to the present invention, extremely minute positional deviations of the plate cylinder can be corrected accurately and quickly by the amount of deviation without the need for advanced technology. It has remarkable effects such as the ability to

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the configuration of an embodiment of a multicolor rotary press to which the plate cylinder register correction control device for a multicolor rotary press of the present invention is applied, and FIG. 2 is a diagram showing the registration correction amount transmission of the same embodiment. An explanatory diagram showing the mechanism, Fig. 3, is the − of Fig. 2.
4A and 4B are explanatory diagrams showing the operation of the main parts of the register correction amount transmission mechanism, FIG. 5 is a circuit diagram showing the configuration of the drive control circuit, and FIG. 6 is a sectional view taken along the line. FIG. 3 is an explanatory diagram of the main parts of the register correction amount transmission mechanism in the direction orthogonal to the web conveyance direction. 4...First printing section, 5...Second printing section, 9,1
0, 13, 14... Plate cylinder, 21, 22... Swing arm, 25, 26, 33, 34... Register correction motor, 50... Drive control circuit.

Claims (1)

[Claims] 1 Each register correction motor corrects the position of a plurality of plate cylinders to a predetermined position via each register correction amount transmission mechanism, and the register of each plate cylinder whose register is corrected by the output of each register correction motor. It consists of a pulse generator that generates a number of pulses corresponding to the amount of correction based on the rotation speed of each of the register correction motors, and a drive control circuit that drives each of the register correction motors in response to the output of the pulse generator, Upon receiving the start signal, the drive control circuit outputs a high-speed rotation signal to each of the register correction motors to rotate each of the register correction motors at high speed to move each of the plate cylinders in the register correction direction; a first subtraction means for subtracting a primary register correction amount based on the output of each pulse generator from a preset register correction amount after receiving the output signal of each pulse generator; and an output signal of the first subtraction means. Then, each register correction motor is rotated at a low speed by the amount of secondary register correction remaining as the difference between the preset register correction amount and the primary register correction amount, and each plate cylinder is moved to a final register correction position. A plate cylinder register correction control device for a multicolor rotary press, comprising a second subtraction means for stopping rotation of each of the register correction motors when the rotation of the register correction motor is stopped.