JPS6198538A - Cutting register controlling method of rotary press - Google Patents

Abstract

PURPOSE:To adjust a cutting register rapidly and to contrive the reduction of labor with waste paper being decreased by adjusting the position of a compensator based on the detecting value of running paper tension at each section, when the ratio of the generalized modulus of elasticity is varried. CONSTITUTION:Running paper 2 equipped to a reel stand 1 is brought to a middle drag roller 7 passing through a tension detecting roller 6 mounting a tension detector 19 through a tension detecting roller 15 mounting a tension detector 18, then, slitted into two halves breadth, both halves are joined at the triangular plate drag roller 11 with the one half is passed through a compensator 8, the tension detecting roller 16 or the like, the other half is passed through a damper 9, a compensator 10 and the tension detecting roller 17 or the like, and cutted and discharged to the outside of a machine. The control of the cutting register is carried out by the adjustment of each compensator 8, 10 such that number of the staying page of the staying running paper 2 between the middle drag roller 7 and the triangular plate drag roller 11 is maintained constant with the tensions T1, T2, T3, T4 of the running paper 2 at the detection rollers 6, 15, 16, 17 being detected by the tension detectors 18, 19, 20, 21.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a cutting register control method for a rotary printing press.

(Prior Art) A method of controlling the cutting register in a conventional rotary printing press will be explained with reference to FIG. 3, which has one reel. (3) and dancer roller (4) to reach the printing unit (5). The printing unit (51 passes through the running paper (2
) passes through the tension detection roller (6) and then the intermediate doji crawler (7).
), and it is slit into half width at this point. The straight part of the running paper (2) is slit into half width (2).
8), and that which passes through the turn bar (9) and part of the turn bar, the converter housing I, join at the triangular plate drag roller (11), reach the triangular temporary housing z, and then , nipping roller 0 and folding machine (14
After t-times, it is discharged outside the machine as a product.

The operator visually detects the amount of misregistration of the product when cutting it,
Compensator (8) is operated manually.

Alternatively, there is a method in which the cutting misregistration is predicted by calculation from the detected tension value and the controllers (8) and (101) are operated fully automatically.

(Problems to be Solved by the Invention) In the conventional manual cutting register control method, it is not possible to quickly adjust the cutting register, so there is a lot of paper waste during disturbances, and the operator has to constantly monitor the cutting register. I need to be there.

Nineteenth, in the calculation method, if the overall elastic modulus of the running paper changes, there is no way to correct it completely, and a calculation error occurs by the change in the overall elastic modulus.

(Ninth means to solve the problem) The tension of the running paper is detected in each part of the rotary printing press, the ratio ti* of the overall elastic modulus of the running paper before and after the printing unit is known, and the ratio of the overall elastic modulus is determined. This invention relates to a cutting register control method for a hot-roll printing machine, characterized in that when the position of the con-inserter changes, the position of the con-inserter is adjusted based on the change, and the cutting register of the running paper is controlled.
The @Tsurikami Sumodoko offers a cutting register control method for a rotary printing press that can quickly adjust the cutting register, reduce paper waste, and save labor.

(Example) Next, an example of the industrial register control method for a rotary printing press according to the present invention will be described with reference to FIG. '(11 is the reel stand,
(2) is the running paper, (3) is the guide roller group, (4) is the dancer roller, (5) is the printing unit, (6) is the tension detection roller, (7) is the intermediate drag roller, (8), α1 is the controller (9) is the turn bar % aυ is the drag Ω
-La, cLz is a triangular plate, or Nitzbinda a-2, san.
is broken. Further, a tension detection roller α9t- is provided between the dancer cx-y (4) and the printing unit (5), tension detection rollers Kasumi and Sumi ηt- are provided downstream of the straight part and a part of the tarts, and a tension 111 output a- La (15)
, (6), (le, (lη is the tension detector C
and a tension detector (181, (11, m, (21) and a copano seven-tare position changing device). (support) and @ constitute a control device @.Also, the peripheral speed of the intermediate drag roller (7) and the peripheral speed of the printing unit 15) are made to be equal.

(Function) In the above-mentioned rotary printing press, the running paper (2) installed on the reel stand (1) passes through the guide roller group (3), the dancer roller (4B), and the tension detector ast is attached via the nine tension detection rollers a9. Then, the running paper (2) reaches the printing unit (5), and the running paper (2) that has passed through the printing unit (51) is passed through the tension detector (l).
lt-The installed tension detection roller (6) is passed through and reaches the intermediate drag roller (η. At this point, the running paper (2) is slit into half width and passes through the insulator (8), the tension detection roller*, etc. After passing through the turn bar (9), insulator tilt, tension inspection!fl roller I, etc., it is legally cut and then discharged as a product out of the machine.

At this time, the reel stand (1) and the printing unit (5)
The tension T□ of the running paper (2) between the dancer roller (41
: Since it is given by , it always maintains a constant value.

The cutting register is controlled by the tension T1. of the running paper (2) at the tension detection roller (6). T,,T3. T4 with tension detector <11.19. Detected by (21) and (21), each con-inserter is configured so that the number of pages of the running paper 12) that accumulates between the intermediate drag roller (7) and the triangular plate drag roller (11) is always constant. 8), (1(
l Adjust Th and control cutting register. Incidentally, since the length of the traveling paper (2) retained between the triangular plate drag roller 01) and the folding machine (14) is short, the misalignment of the cutting register during this period can be ignored.

Since the present invention performs the cutting register control method as described below, the running paper (
2) is transferred to the folding machine A4 while keeping the cutting register constant, and after being cut to a specified size, it is discharged from the machine as a uniform product.

The present cutting register control method will be described in detail below. For example, running paper (
2) passes through the straight part, the printing unit (5)
Expressing the number of pages of the traveling paper retained between the printing unit (5) and the triangular plate drag roller I in a mathematical formula, N is the number of pages retained between the printing unit (5) and the triangular plate drag roller I, and 11 is constant with the pattern length at the time of printing (circumference of the blanket). , 12 is the printing unit (5) ~
The pattern length between the middle drag roller! 3 is the intermediate drag roller (
7) The pattern length between the triangular plate drag row 90, L2 is the span length between the printing unit (5) and the intermediate drag roller (7),
L3 is the span length between the intermediate drag roller (7) and the triangular plate drag roller D, W is the width of the running paper, the glue is known, El is the overall elastic modulus of the printed image, El is known, E2 is the overall elastic modulus after printing, ε is Let us assume that the elongation rate of the running paper (2) before printing, ε2 is the elongation rate of the running paper between 52 and ε3 is the elongation rate of the running paper (2) between 53! , (l-jin □ ten and 2) T, =tuE1ε1T 2 =wE2ε2 T3=
-E2ε3...■■, Substituting the 0 formula from the ■ formula, ε1. ε2. When ε3 is eliminated, the overall elastic modulus E8 of the printed image of the running paper (2) is almost constant during operation, but the amount of moisture given to the running paper (2) by the printing unit (5) is equal to the amount at the start of operation. Alternatively, the overall elastic modulus E2 after ninth printing, which varies during operation, varies.

However, in the present invention, the peripheral speeds of the intermediate drag roller (7) and the printing unit (5) are made equal as described above, and a specific example of the cutting register control method of the present invention will be described below with reference to the block diagram of FIG. This will be further explained using an example shown in FIG. Based on the human power signal T1 from the tension detector side shown in FIG. 1 and the input signal T2 from the tension detector staff! l, E, In the correction part (c), the overall elastic modulus before printing E1t-
After printing, the overall elastic modulus E2t is corrected based on the standard, and E2 of the coefficient unit @kun is corrected.

Input signal T1. A signal corresponding to the first term of the coefficient folding expression is formed by the coefficient function T2 and @. A number is formed in the same way, and the signal corresponding to the first term of the formula (■) and the signal corresponding to the second term of the formula (■) are added by an adder, resulting in a signal corresponding to the number of pages N staying between the printing unit (5) and the triangular plate drag roller I. However, the corresponding signal is compared with the signal corresponding to the set value of the number of retained pages by a comparator, and the tension of the running paper (2) is changed to the tension of the running paper (2) by the action of the tensioner position changing device (c). (8)
The position of is corrected so that the number of retained pages of the running paper (2) passing through the straight section is set to NO. Since the above operations are performed online, cutting register control is quick and
Paper waste can be minimized, and the automatic control can greatly reduce the number of operators.

The same thing can be done for the running paper (2) that passes through part of the pattern pattern. For example, in Fig. 2, T3t-T4 is replaced with the symbol t-(c) of the con-insulator position changing device.
You can use @ instead.

(Effects of the Invention) As described above, the present invention provides a rotary printing press in which the circumferential speed of the printing unit and the intermediate drag roller is made equal, and the tension of the running paper is maintained before and after the printing unit and between the intermediate drag roller and the triangular plate drag roller. The total elastic modulus of the running paper before and after the printing unit is grasped online based on the ratio of the tension of the running paper before and after the printing unit, and the tension of the running paper before and after the printing unit and between the intermediate drag roller and the triangular plate drag roller is calculated. Since the cutting register is adjusted by controlling the position of the controller online using a human signal based on the overall elastic modulus of the running paper, no errors occur in the trimming register adjustment. The cutting register can be adjusted quickly and the number of horizontal sheets can be minimized.

Further, there is an effect that the number of operators who perform the above adjustment automatically can be reduced. All the embodiments of the present invention have been described above, but of course the present invention is not limited to these embodiments, and various changes in design can be made without departing from the spirit of the invention. be.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment embodying the cutting register control method for a rotary printing press according to the present invention, FIG. 2 is a block diagram showing details of the control device shown in FIG. 1, and FIG. 3 is a conventional FIG. 1 is a side view showing a rotary printing press. (2)...Running paper (5)...Printing unit failure9. (21m, (21)...Tension detector CI!
3. (23... Compensator position changing device @...
Control device sub-agent Patent attorney Shige Okamoto 3 persons Figure 1 Horse Figure 2

Claims (1)

[Claims] The tension of the running paper is detected in each part of the rotary printing press, the ratio of the overall elastic modulus of the running paper before and after the printing unit is detected, and when the ratio of the overall elastic modulus changes, the compensator position is adjusted based on that. A cutting register control method for a rotary printing press, characterized in that the cutting register of a running paper is controlled.