JPH09277494A - Register correction apparatus of web type multicolor printing rotary press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform sure, good register correction by simple constitution by a method in which a correction amount, etc., in each speed of a rotary press are inputted, the inputted correction data are stored, and a register correction apparatus is controlled to be the stored correction amount in each operation speed of acceleration, deceleration, and constant speed. SOLUTION: Constituents are an input apparatus 1 which inputs printing conditions of a register dislocation correction amount and/or a dampening water amount, paper quality, etc., previously during operation, a memory 2 which stores the correction amount in relation to the printing conditions and sends an operation speed obtained from an operation speed sensor 4 and the correction amount corresponding to the printing conditions of the dampening water amount, etc., obtained from a printing machine controller 7 to a controller 3, and the controller 3 which performs register adjustment by moving a register motor 5 based on the correction amount. Good register accuracy can be obtained by conducting register control by inputted correction amount corresponding to various operation conditions, which has a correction amount corresponding to the operation conditions of a machine because dislocation amounts are different even for the same operation conditions, especially during acceleration and deceleration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a register correcting device applied to a vertical register correction in a web type multicolor rotary printing press.

[0002]

2. Description of the Related Art A conventional device will be described with reference to FIGS.

FIG. 3 shows a schematic structure of a rotary printing machine for performing multicolor printing on a web.

The web 6 is fed from a paper feeding device (not shown), passes through a first color printing device I, a second color printing device II, a third color printing device III, and a fourth color printing device IV, and is printed on both sides of the web 6.
Color printing is carried out and the next step is carried.

For example, the first color printing device I is an inking device 20.
_aI , dampening device 21 _bI ink also dampening device 21 _aI
Dampening water is supplied to the plate attached to the surface of the plate cylinder 22 _aI from the fountain solution, and the ink attached to the pattern is blanket cylinder 23 a.
Transferred to _aI , the ink is transferred to one side of the web 6.

The other surface of the web 6 is similarly inked.
0 _bI, dampening device 21 dampening from _bI and ink water plate cylinder 22 _bI
The ink is supplied to the web 6 via the blanket cylinder 23 _bI .

Printing is performed in the same manner for the second and subsequent colors up to the fourth color, and finally a printed material for the fourth color on both sides is obtained.

FIG. 4 shows an outline of a drive system of the multicolor printing apparatuses I to IV. The driving force by the main motor 30 is the bevel gear 4
4 and 45, transmitted to the vertical axis 33, and the lower curved bevel gear 3
7, 36, helical gears 36 ′, 42, 41, _43, and transmitted to blanket body gears 32 _aI , 32 _aII .

Other related plate cylinders and the like are shown in FIG.
The blanket body gear 32 _aIOr 32_aIIBiting into
Driven in mesh. For example, for the first color, the bra
Bracket body gear 32_aIOn the other hand, the plate cylinder on one side (a side)
Gear 31_aIAnd blanket body gear on the other side (b side)
32_bIMeshes with the blanket body gear 32_bIOn the b side
Plate body gear 31_bIMeshing with each printing cylinder corresponding to each gear
Is driven.

Similarly, all the four color printers I to IV can be operated in the same phase by one main motor 30.

However, during acceleration / deceleration of the operation, the tension applied to the web 6 fluctuates, and the web is stretched, which causes misregistration, particularly in the vertical direction (web running direction).

This vertical misalignment is due to the reason described above.
Not only due to
Each blanket body gear 32 caused by the collapse of the gears, etc._aI~
32 _aIV, 32_bI~ 32_bIVCaused by the phase shift of
You. Also, due to changes in the amount of dampening water,
Differences in paper quality that accompany them, and the misregistration described above
It causes it to fall.

FIG. 5 shows the overall construction of a conventional register adjusting device.
FIG. 6 shows a phase correction mechanism for register adjustment, and the up-and-down register adjustment will be described.

[0014] speed of the web 6 which travels is detected by the operation speed sensor 48 is transmitted to the register adjustment device 42 _a 42 _b. Here, with the cameras 41 _a and 41 _b ,
As shown in (a), register marks 4 of 1 to 4 colors
3 _I to 43 _IV are read, and the amount of register deviation is calculated for the remaining three colors with one color as a reference, and the correction amount for register adjustment is calculated.

In this case, with the fourth color as a reference, the first color
The correction amounts for the fourth to third colors are shown in FIG.
As shown in (b), they are 1d, 2d, and 3d. This supplement
Register adjuster 42 according to positive amount_a, 42_bIs the register adjustment mode
Data 5_aI~ 5_aIII, 5_bI~ 5 _bIIIMove, shown in Figure 6
Rotate the screw 44 with the phase correction mechanism and
Move the helical gear 32 in the direction of arrow A
By changing the relative position of the helical gears 32 and 31
Change and adjust the phase of blanket cylinder 23 and plate cylinder 22
The register is adjusted in the vertical direction.

[0016]

However, the conventional register adjusting device requires an optical system device such as a camera for reading the register mark as described above. Therefore, there is a problem that a malfunction of the register adjustment due to the dirt of the lenses is caused, or when the tension fluctuation is large, the web flaps and the register mark cannot be detected.

Along with this, maintenance work such as cleaning of the lens is required. In addition, when installing on an existing printing machine, a camera, etc. must be installed inside the machine at the web exit, and after the installation, the encoder that detects the operating speed of the machine and the registration timing of the register mark by the camera must be matched. Adjustments were required, such as having to do so, and the cost and labor required for remodeling was enormous.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and to provide an apparatus capable of surely performing good register correction with a simple structure.

[0019]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in a web type multi-color rotary printing press, which corrects misregistration between colors when the printing press is accelerated or decelerated, Register adjustment device for adjusting the top-and-bottom register, input device for the correction amount etc. at each speed of the rotary press, device for storing the data of the input correction amount etc., memory for each operating speed of acceleration, deceleration and constant speed To provide a register correction device for a web-type multi-color rotary printing press provided with a control device for controlling the register adjustment device so as to obtain a correction amount that is in advance and / or during machine operation, during acceleration and deceleration. And or, based on one color at each operating speed of the machine such as at constant speed, the register correction amount of each other color corresponding to that is input and stored in the storage device from the input device and stored separately in the storage device. Depending on conditions such as the amount of dampening water added, paper quality, etc., and the operating device of the machine and conditions such as constant speed during acceleration and deceleration, send an appropriate register correction amount to the controller of the motor for register adjustment, The control device moves the register adjusting motor according to the register correction amount to perform register adjustment.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. It should be noted that the same parts as those of the conventional one described above are denoted by the same reference numerals in the drawings, and overlapping description will be omitted.

In the present embodiment, the input device 1 for inputting the misregistration correction amount and / or printing conditions such as dampening water amount, paper quality, etc. in advance and / or during operation, and the correction amount are printed. The operation speed obtained from the operation speed sensor 4 and the printing press control device 7 are stored and stored in association with the conditions.
The storage device 2 sends a correction amount corresponding to printing conditions such as the amount of dampening water obtained to the control device 3, and the control device 3 that moves the register adjustment motor 5 based on the correction amount to perform register adjustment.

A case of correcting the register of the first color with respect to the fourth color in the present embodiment configured as described above will be described with reference to FIG.

In FIG. 2, starting from a constant speed operation P _6C (print, 60,000 copies / H, meaning Constant Speed) of 60,000 copies / H, 80,000 copies / H to 140,000 copies / Misregistration in the process of gradually changing to H acceleration operation, performing constant speed operation of 140,000 parts / H, and then gradually changing to deceleration operation of 120,000 copies / H to 60,000 copies / H. The following is an example of correcting

That is, at each printing operation speed, as shown in FIG.
When the misregistration shown in Figure ₆ is obtained, the correction amount at P6C is 0.42 mm in the upward direction. Also the correction amount during the acceleration to 80,000 parts / H is a 0.27mm to upward direction, the P _8A is after performing the correction in P _6C is, P _6C -P _8A = 0.1
It will be corrected by 5 mm toward the ground. Further, if the shift amount is 0.15 mm toward the ground during acceleration to 100,000 copies / H, and if correction is performed in the upward direction during acceleration to 80,000 copies / H, P at P _{10A 8A-} P _10A =
Only 0.12 mm should be corrected toward the ground.

The register correction is performed by performing the above-described operations during deceleration, acceleration, and constant speed. Even if the operating speed is the same, the deviation amount is different between acceleration and deceleration, so that it is necessary to have a correction amount corresponding to the operating conditions of the machine such as acceleration, deceleration, and constant speed.

Good registration accuracy can be obtained by inputting correction amounts corresponding to various operating conditions (printing speed, dampening water amount, paper quality, etc.) and performing register correction based on them.

Although the present invention has been described with reference to the illustrated embodiment, the present invention is not limited to such an embodiment.
It goes without saying that various modifications may be made to the specific structure within the scope of the present invention.

[0028]

As described above, according to the present invention, an input device for inputting printing conditions such as operating speed, dampening water amount, paper quality, etc., as well as register correction amount at each operating speed, and the correction amount and printing condition are associated with each other. The storage device that stores various information and stores various printing conditions from the control device of the printing press and the operating speed sensor and outputs the above-mentioned correction amount corresponding to the printing conditions to the control device and the register adjustment motor are controlled to correct the register correction. Good register correction can be performed with a simple configuration such as a control device for performing.

Further, since the present invention does not use a device such as a camera which must be installed at a desired place, it can be easily installed not only in a new installation but also in an existing printing press, and the cost and labor required for remodeling. In comparison with the conventional register correcting device, the device price can be remarkably reduced.

Furthermore, since no camera or the like is used, maintenance for cleaning the lens and the like is not necessary, and malfunctions in register correction are not caused even when the web flaps due to tension fluctuations. Is played.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a register correction device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of register shift amount at each operating speed.

FIG. 3 is a schematic configuration diagram showing a conventional four-color printing apparatus.

FIG. 4 is a schematic configuration diagram showing a drive system in FIG.

5 is a configuration diagram showing a register adjusting device in FIG.

FIG. 6 is a schematic view showing a phase correction mechanism in the one shown in FIG.

7A is an explanatory diagram showing an example of a register mark, and FIG. 7B is an explanatory diagram showing a relationship between a register mark and a register mark.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input device 2 Storage device 3 Control device 4 Operating speed sensor 5 Register adjustment motor 6 Web 7 Printing press control device 20 Inking device 21 Damping device 22 Plate cylinder 23 Blanket cylinder 30 Main motor 31 Plate cylinder helical gear 32 Blanket cylinder Lotus Toothed gear 33 Vertical axis 34,35 Upper bevel gear 38,39,40 Helical gear 41 Camera 42 Register adjustment device 43 Register mark 44 Screw 45 Spline I 1st color printing part II 2nd color printing part III 3rd color printing part IV 4th color printing section

Claims (1)

[Claims] 1. A method for correcting misregistration between colors when accelerating and decelerating a rotary press of a web type multi-color rotary printing press,
Register adjustment device that adjusts the top-bottom register of each color, input device for correction amount etc. at each speed of rotary press, device for storing data of input correction amount etc., acceleration, deceleration and constant speed operation A register correcting device for a web-type multi-color rotary printing press, which is provided with a controller for controlling the register adjusting device so as to obtain a correction amount stored at a speed.