JPS59123665A - Register regulator - Google Patents

Abstract

PURPOSE:To obtain a register regulator capable of exact pattern matching by using a system in which register marks provided on the operation and drive sides of each plate are detected, regulating amount of deviation from phase difference with a reference point is calculated, and by correcting the varying phase differences, the regulation amount is calculated. CONSTITUTION:Register marks 24, 25, 26, 27, 41, 42, 43, and 44 are provided on the operation and drive sides of color plates 28 and 40, and from a reference point signal and each mark detection signal, phase difference between the signals are detected by discrimination circuits 59, 60, and 61. The signal representing the phase difference is put in a pulse width detection circuit 73 and converted into numerals, and output signals of counters 66, 67, and 68 are put in an arithmetical unit 69 where correcting amounts in the deivating direction and vertical and bilateral directions are calculated and sent out. Correcting motors 29, 30, and 31 are turned to move the plate cylinders 12 and 13 until the error is zeroed.

Description

[Detailed description of the invention] It is.

In a printing press, good prints cannot be obtained unless the designs of the first, second, ... nth color prints match perfectly. In this way, the conventional method of performing registration adjustment to match the sections (/i 1st color.

Marks were placed on the plate for the second color...the n-th color, and while printing, the marks appearing on the printing paper were adjusted to 1 so that they all matched perfectly. However, this results in defective prints, i.e., waste paper, in the process of producing normal prints! f. This method has the disadvantage of requiring additional adjustment skills and wasted time.

In order to solve this problem and make adjustments before feeding the printing paper, each plate is provided with register marks in the horizontal direction and in the margin direction, and the same register marks are automatically detected before printing, and the detection signal is There is one that detects misregistration errors in the horizontal, vertical, and torsional directions with respect to a predetermined reference signal, and adjusts the plate cylinder by the amount of these misregistrations. However, in this case, each error amount is adjusted independently, so correction of the torsional direction misregistration simultaneously affects the vertical and lateral direction misregistration amounts.
If there was a registration error in the twisting direction, accurate pattern matching could not be achieved.

Therefore, fine adjustments must be made manually after adjustment.

The present invention has been proposed in order to solve the above-mentioned conventional drawbacks, and includes a reference point setting mechanism that is disposed in a part that rotates in synchronization with the plate cylinder of a multicolor printing press and that arbitrarily sets a reference point. Horizontal and diagonal register marks provided on the operation side and drive side, respectively, a detection device arranged adjacent to each color screen to detect the register mark and emit a signal, and the reference point signal and each mark detection signal. a phase difference discrimination circuit that detects the phase difference between each signal, a detection circuit that digitizes the signal indicating the same phase difference into a predetermined pulse signal, and an operation side horizontal direction register that inputs the digitized detection signal. The amount of torsion of the plate is detected from the phase difference between the mark and the horizontal register mark on the driving side, and the amount of torsion adjustment is calculated. Corrects the phase difference between the vertical direction and the horizontal direction, which changes depending on the amount, and calculates the adjustment amount in the vertical direction and the horizontal direction.The plate cylinder torsion correction motor, vertical direction correction motor, and horizontal direction correction are also operated according to each adjustment amount. It is an object of the present invention to provide a registration adjustment device that is characterized by being equipped with a control device that drives a motor and that can perform accurate pattern matching based on the detected amount of registration error.

Hereinafter, the present invention will be explained in detail with reference to the most preferred illustrations and embodiments shown in FIGS. 1 to 8.

As shown in FIG. 1, a sheet-fed printing machine has a paper feeding device l.

Printing device 23. It is composed of a paper ejecting device 4.

Paper feeding device 1 is a device that feeds printing paper 5 to printing device 2.3. In the printing device 2.

The ink 8 stored in the ink tray 6 passes through the ink roller group 10 and reaches the plate which is being removed from the plate cylinder 12, and then the ink 8 attached to the plate is transferred to the blanket cylinder 14. , the printing paper 5 flowing from the paper feeder l is printed between the blanket cylinder 14 and the impression cylinder 16. This is the first color printing.The printing paper 5 that has passed through the printing device 2 is , passes through the intermediate cylinder 17, and enters the second color printing device 3. Similarly to the first color printing device 2, ink tray 7. Ink 9. Ink roller group 1.
The ink 9 is transferred to the blanket cylinder 15 by the action of the eleventh plate cylinder 13, and the printing paper 5 is printed between the blanket cylinder 15 and the impression cylinder 18, resulting in second color printing. As described above, the printed paper 5μ printed in both one color and two colors is sent to the paper discharge device 4 via the paper discharge cylinder 19, and all operations are completed. FIG. 2 is a perspective view of the cylinder of the sheet-fed printing press shown in FIG. 1. In the figure, a plate 28 is mounted on the plate cylinder 12.
There are register marks 24, 25 on the operation side and register marks 26, 27 on the drive side. Register mark 24.
Mark 26 parallel to the front edge of the plate 28.

Register mark 25.27 is register mark 24.26
Draw a mark with an angle θ to . Floodlight 20
．． The light receiver 21 is fixed at a position where it can detect the register marks 24 and 25.

In addition, the emitter/receiver 22.23 has a register mark 26.27.
f: Fixed at a position where it can be detected. Proximity switch disc 3
6 is directly connected to the plate cylinder 12.

The proximity switch 37 is fixed at a position facing the proximity switch disk 36. In addition, the disc 38 for the close-in position is the impression cylinder 1.
6, and the proximity switch 39 is also fixed in the same manner as described above.

The pulse generator 34 passes completely through the shaft 35 and is directly connected to the impression cylinder 16 . The register motors 29, 30.31 are connected directly to a forme cylinder drive 33.52 and connected to the forme cylinder 12 via a shaft 33.53.

The plate cylinder drive devices 32, 52 each have a known mechanical mechanism for adjusting twist, vertical, and left/right register, and are operable only when the above adjustment is necessary.

Just like the first color, there are also register marks 41, 42, 43° 44 on the plate 4o of the second color printing device, and a light emitter 46° 48, a light receiver 45, 47, . The proximity switch disc 49 and the proximity switch 5o are also similar to those described above. In addition, the proximity switch discs 36, 3 mentioned above
8.49 The accompanying proximity switches 37, 39, and 50 may be placed anywhere as long as they are in the same phase as the rotation of the single-fed printing press.

Next, the effect will be explained for the printing device 2 for the first color. In FIG. 2, horizontal register marks 24.
26 is not twisted with respect to the reference connecting the operating side and the driving side, the second plate cylinder 12 is rotated and the light emitter/receiver 20, 21, 22 .
At 23.

FIG. 3 shows the positions of the valley register marks when the horizontal register marks 24, 26 and the diagonal register marks 25, 27 are detected. In Fig. 3, X, -X2 indicate the detection lines of the light emitter/receiver 20.
2 indicates the detection line of the light emitter/receiver 22 and 23 on the drive side. 2. -22 represents the signal transmission position of the proximity switch 39. Horizontal register mark 24.26 (
7) Set the position of the detection start point to 2. -22 to a distance.

Let b be the distance from the detection end point of the horizontal register mark 24.26 to the detection end point of the diagonal register mark j, 5.27. Here, it is assumed that the second to nth colors have already been registered, and in this state, the first color register mark 24°25.26.27 is at the position shown in FIG.

] It is assumed that there is no registration error for all colors from color to n. In this state, a will be referred to as a target value in the vertical direction, and b will be referred to as a target value in the horizontal direction. Therefore, only for the first color, the plate cylinder 12
Or Plate 28 as Tenchi.

The position of the register mark at that time is shown in FIG. 4 when the register mark is moved in the left/right twisting direction. Register mark 24 at this time.
The position of the detection start point of 26 is a from 21-22 respectively.
Hr a is 2 and al is the operating side vertical direction detection value 1
a2 is called the driving side vertical direction detection value.

Then, calculate the distance from the detection end point of register marks 24 and 26 to the detection end point of register mark 25 and 27, respectively. Let b2 be and 7bl be the operating side left and right direction detection value +
l) 2 is called the drive side left/right direction detection value. In order to match the position of the register mark detected as shown in FIG. 4 with the position of the target value shown in FIG. 3, the plate cylinder is corrected to match the register.

First, registration adjustment in the torsional direction will be explained. In Figure 4, the amount of twist due to the register mark deviation value is 61
Then 61 is.

ε1=aI−a2 ・−・・(1)
It is expressed as In order to eliminate this twist amount ε1, the register in the twist direction is corrected. To correct the register in the torsional direction, the torsional register correction motor 29 is driven using the bearing 51 shown in FIG. 2 as a fulcrum O. Therefore, in order to eliminate the amount of twist ε1, the amount of correction in the twist direction must be set to ε as shown in FIG. This correction amount ε is calculated from the fulcrum O by the line 2. - Draw a parallel line to 22, and line X, -
The intersection A of X2 is also based on the detection start point 1 of the register mark 24. Therefore, this twisting direction correction amount ε is the distance between the detection lines of the operating side and driving side register marks as A,
Detection line X, -X of operating side register mark from fulcrum O
Assume that the deviation at 2t is B, the detection line Y of the drive side register mark is Y, and the deviation at -Y2t is C.

B ε1-(al ”2) ・・・・・・・・・(2)
It becomes A. When the torsion direction register correction motor 29 is driven with this amount of torsion direction correction, the length is 1 (10
, move from the position of 103 by the position dimension of 101°104,
The registers in the twisting direction match. In addition, in FIG. 5, the positions of the register marks 101 and 104 indicated by solid lines indicate the positions after the register correction in the torsional direction, and the positions of the register marks 101 and 104 indicated by one dotted line indicate the positions after the registration correction in the torsional direction.
0 and 1.03 indicate before correction. Further, the positions 102, 105u of the Lujista marks shown in dashed dotted lines indicate the target positions shown in FIG.

Next, registration adjustment in the vertical direction will be explained.

As shown in FIG.
) becomes a message. Therefore, in order to adjust the register to the target value a in the vertical direction, the amount of correction in the vertical direction should be ξ.

ξ=a, -ε-a---+31. From equation (2), equation (3) is B, B B ξ=a, --(a, -82)-a=(1-z)a, +
za2-a (represented as 41. If the vertical direction forward 'l fl + positive motor 30 is driven with this vertical direction correction amount ξ, the vertical register will match. Furthermore, when using the drive side mark, the left and right The direction register adjustment will be explained. Figure 6 shows an enlarged view of the position of the register mark on the drive side in Figure 5. Then, 1 is found as follows: 1. From the fulcrum O at the dotted line register mark 103 before the twist direction is corrected.

Set point C from the bias as α and draw a perpendicular line from the second point α.

Let the intersection with the line ¥1-Y2 be β. Then, the detection start point of the horizontal register mark of the solid line register mark 104 is set to Y3. Furthermore, 2 dotted line register mark 1
The slope of 03 is line 2. If η is set to −22, the result will be as shown in FIG. In other words, according to the theorem of geometry, 2 points Y3.
Distance between β and point α.

The distance between β becomes equal, and 01 in FIG. 7 becomes η/2.

Therefore, from triangle Oβα η αβ=Ctan−・・・(5) It is expressed as It's a size.

θ2+θ3-90°...(51-1η+
03-90° ・-・+51-2
02 = η
+51 -
It is 3.

The equation 5) can also be obtained as follows.

Triangle 0Y30 shown in Figure 7, ? , if m=M.

becomes.

moreover.

If ασ−N, then N=M−C, and from the triangle αβσ, 02−η is expressed as 1η=2227 αβ C(1−cosη) η−η.

Next, it will be shown that equation (5) and equation +51-6 are equivalent.

251n,-! 2. cQs-! 2- 　　　　2 η　　η 22 = :C, LaII-z It can be seen that they are equivalent.

Therefore, let γ be the distance from point β in FIG. 6 to the dotted line at the register mark detection starting point.

The value becomes η. Next, if we set the thickness of the register mark to μ, we get
The distance passing through the horizontal register mark is δ.

becomes. Therefore, after correcting the twist, the left and right direction W huge release ball can be found as follows. In other words, at mark position 1-03, if the distance between P□ and 24 is -J4, and the distance between P2P3 is 1 C F3, b-P1P4-P2P3...+71-1
Here, PIP4 = 1)2 C1)Sη...
-+7) -2-F3 is triangle P. From P2P3, 2 is also 10...+7)-3, is a triangle P. From P2β, p, p2-(r+δ+b2)Sjnη...17
) -4 Therefore, from the +71-3 and +71-4 formulas, -(γ+δ+b2)sinη-〇 ・+71-5
+7+-2 and +71-5 formula +7) -1 Hey father, the following is.

b'= b, pη-(γ+δ+bz) sinη・-θ
... ・(8) becomes.

(6+, Substituting equation (7) into equation (8) gives equation (8).

= bz (10oη-5inη・伽β)-(C→斗μ
) is expressed as η reference nθ... (9). Therefore, in order to align the target value in the horizontal direction of the target register mark shown by the dashed line in FIG. (C1an
+p, η1θ−b −110+. However, η-thin + 'B-1an'('', is a thing.

Here, r bz is a detected value in the left and right direction on the driving side, and θ is an angle determined in advance in the mark shape. With this left and right correction amount ψ, the left and right direction correction motor 3
When 1 is driven, the left and right registers match. In the above, the left and right register can be corrected in the same manner using the operation music register marks. In register correction, the order of correction in the vertical direction, horizontal direction, and torsional direction is free. Furthermore, regarding correction in the left and right directions in Section 2, if the difference between bz and position is small enough to not affect the desired register adjustment accuracy.

ψ-b2-b...It may also be Cl1l. Talented. For the effects of the second and subsequent colors, if the operating side vertical direction target value, the driving side vertical direction target value, the operating side horizontal direction target value or the driving side pressure right and left target value are determined in the same way as the first color, the same effect as the first color can be obtained. Register adjustment can be performed by

Next, the operation of detecting these register errors using a specific circuit will be explained based on FIG. 8. Floodlight 20
, 22. Receiver 21.23 is the first color registration mark 24
．． The proximity switch disc 36 is moved to a phase that can detect 25.26°27, and the proximity switch 37 is set to generate a signal at that time. The proximity switch 37 is configured by the proximity switch disc 36, with the emitter 20°22, the receiver 21.
23 passes over the register mark 7. This corresponds to timing 54 in FIG.
0,22. The photodetectors 21 and 23 detect the printing plate, but
55.56 open according to timing 54, the floodlights 20.22. Light receiver 21. ．． 23 is the first color horizontal register mark 24.26 and the first color diagonal register,
t, the rotations 25 and 27 are detected. The outputs of the gates 55 and 56 are transmitted to the respective mark discrimination circuits 57
．． 58 manpower. The output C is inputted to the operating side position phase difference determining circuit 59, and the output is inputted to the driving side position phase difference determining circuit 6o. Therefore, the operating side celestial phase difference determination circuit 59 selects the reference point 2. The phase difference at the rising edge 1 of the horizontal register mark 24 is output from -22 to 2, and the driving side position phase difference determination circuit 60 outputs the phase difference at the reference point 2. -2 , , the phase difference at the rising edge of the horizontal register mark 26 is output. In addition, the left/right phase difference discriminating circuit 6 is connected to the mark discriminating circuit for which the changeover switch 62 is turned down (in the following text, this changeover switch is assumed to be turned to the Q side). The phase difference at the first falling edge of the diagonal mark 27 is output. Output signals E, F, G of these phase difference discrimination circuits 59, 60, 61
is input to the ζ pulse width detection circuit 73 and calculated quantitatively. A specific example of the pulse width detection circuit 73 using the pulse signal generator 34 will be described below. As the impression cylinder rotates, the output l (K) from the pulse signal generator 34 generates a pulse signal at regular intervals. When the signal E is ON, the gate 63 is opened, and the pulse of the signal H is applied to the horizontal direction mark on the operating side. 63 (ri is closed).

The pulses of the signal generator are cut off.Therefore, signal 1 is a signal obtained by converting the phase difference between the reference point Z1-22 and the point at which the rising edge of the horizontal register mark 24 on the operation side is detected into the number of pulses. The number is the above-mentioned al. Then, when the signal F is turned ON, the gate 64 is opened, and the pulse of the signal H flows to the driving side horizontal direction mark counter 67, and the signal F is turned on.
When OFF, the gate 64 is closed and the pulse of signal H is cut off. Therefore, the signal J is at the reference point 2. The phase difference from -22 to when the rising edge of the drive side horizontal register mark 26 is detected is converted into the number of pulses. This number of pulses is the aforementioned a2. On the other hand, phase difference discrimination circuit 61
When the signal G is ON, the gate 65 is opened, and the pulse of the signal () flows through the counter 68 for diagonal marking. When the signal G is OFF, the gate 65 is closed and the pulse is cut off. Therefore, the signal The phase difference from the falling edge of the horizontal register mark 26 to the falling edge of the diagonal register mark 27 is converted into the number of pulses.This number of pulses is the aforementioned (7) b2. Input the three output signals IJK of the drive side horizontal direction mark counter 7 and 66 and the drive side horizontal direction mark counter 67 and the diagonal direction mark counter 68, and calculate the torsional direction correction amount ε using the above-mentioned formula (21). Then, calculate the amount of correction in the vertical direction ξ from the above equation (4), calculate the amount of correction in the horizontal direction ψ from the equation (10) or (11) above, and calculate the amount of correction in the torsional direction ε and the correction in the direction of entry. The amount ξ and the horizontal direction correction amount ψ are output.The torsion direction register correction motor 29 is rotated to match the twist direction correction amount ε and the plate cylinder is moved in the torsion direction until the error becomes zero.The twist display rung 70 is also output. The direction correction amount ε is displayed.The vertical direction registration correction motor 30 is rotated by the vertical direction correction amount ξ, and the plate cylinder is moved in the vertical direction with a direction that makes the error zero.Then, the vertical direction display lamp 71 The direction correction amount ξ is displayed. Further, the left and right direction correction motor 31 is rotated by the left and right direction correction amount ψ to move the plate cylinder in the left and right direction until the error becomes zero. Then, the left and right display lamp 72 shows the left and right direction correction amount. Display ψ.

As explained in detail above, the present invention provides horizontal and diagonal register marks on the operation side and drive side of each printing plate, automatically detects the register marks, and detects the phase difference with a predetermined reference point. death.

From these detected phase differences, the twist adjustment amount is calculated and 1
Next, the vertical and horizontal forces corrected for the vertical and horizontal phase differences changed by the torsion adjustment amounts are calculated, and the torsional, vertical, and horizontal forces are calculated according to each adjustment amount.
Since the left and right registers are adjusted, accurate register adjustments can be made based on the register mark detection values. Also, this eliminates the need for the operator to fine-tune the register after adjustment.

[Brief explanation of drawings]

1 to 8 show an embodiment of the present invention, FIG. 1 is a front view of a sheet-fed printing press equipped with this embodiment, and FIG.
Fig. 3 is an explanatory diagram showing the target position of the register mark after adjustment; Fig. 4 is an explanatory diagram showing the state of the register mark before adjustment; Fig. 5 is an explanatory diagram showing the position of the register mark after adjustment. FIG. 6 is an explanatory diagram showing the drive side of FIG. 5 in an enlarged manner. FIG. 7 is an explanatory diagram showing only the positional relationship of the register marks before and after the torsion adjustment in FIG. 6. The figure is a professional circuit diagram. 2.3... Printing device, 12.13... Plate cylinder, 28°40... Plate, 24, 26, 41.43... Horizontal register mark, 2s, z7, 42.44... Diagonal register mark, 20, 22, 46° 48... Emitter, 21, 23, 45. 47... Light receiver, 2. −
22・Reference point, 59...Operation side celestial phase difference discrimination circuit,
60... Drive side celestial phase difference determination circuit. 61... Left and right phase difference discrimination circuit, 34 - Pulse signal generator, 69... Arithmetic unit, 29... Torsion correction motor, 30... Vertical correction motor, 31... Left and right correction motor.

Claims (1)

[Claims] A reference point setting mechanism is installed in the part of the multicolor printing press that rotates in synchronization with the plate cylinder to arbitrarily set a reference point, and horizontal and diagonal registers are provided on the operation side and drive side of each color plate, respectively. a detection device disposed adjacently for each color plate and detecting the register mark and emitting a signal; a phase difference determination circuit detecting a phase difference between each signal from the reference point signal and each mark detection signal; A detection circuit converts a signal indicating the same phase difference into a numerical value using a predetermined pulse signal, and inputs the detection signal converted into an Af+ register value and detects the torsion of the plate from the phase difference between the horizontal register mark on the operating side and the horizontal register mark on the drive side. The amount is detected, the amount of torsion adjustment is calculated, and the phase difference in the vertical and horizontal directions that changes depending on the amount of torsion adjustment is corrected from the phase difference between the horizontal and diagonal register marks on either the operating side or the drive side. The apparatus is characterized by being equipped with a control device that calculates adjustment amounts in the vertical and horizontal directions, and drives a torsion correction motor, a vertical correction motor, and a horizontal correction motor of the plate cylinder according to each adjustment amount. Register adjustment device.