JPS59104939A - Apparatus for controlling tension force in printing press - Google Patents

Abstract

PURPOSE:To enable highly precise printing, by providing a back tension roller always reversely rotated by a servo motor between a delivery roll and an intermittently drawing roll through a powder clutch to remove the slackening of a paper feed part. CONSTITUTION:A reversal tension roll 8 is arranged to the leading end side of a paper feed part 2 and a stepped roll 10 equipped with a swing arm 9 is provided between said tension roll 8 and a delivery roll 7. A servo motor 12 is connected to the shaft 8' of the tension roll 8 through a power clutch 11 and the tension roll 8 is reversed when the clutch 11 is thrown in while the servo motor 12 is always reversed. In this case, the delivery roll 7 is rotated in synchronous relation to a printing part 3 by using a pulse motor.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tension adjustment device in a printing press, and more specifically, to adjust the tension of the paper feed inside the printing unit from the pull-out roll provided in the paper feed unit to the intermittent pull roll. .

Conventionally, the tension reaching the printing section is measured by using a step roll installed in the paper feed section without placing any weight on it, but after 30 St., it becomes impossible to follow the jjv movement of the paper, and the impact load (
Therefore, in order to compensate for this defect, a powder brake hole was installed between the paper feed section and the printing section.
- It is used to absorb the collision of the stepped rolls and to set the tension between the paper feed pull rolls.
As it becomes O♂t/1n970♂t/1m, it becomes 5, which slightly affects the product accuracy.

Therefore, the present invention aims to solve the above-mentioned conventional drawbacks, and provides tension by providing a back tension roll which is constantly rotated in reverse by a servo motor equipped with a powder clutch between the immediate pull roll and the intermittent pull roll. This improves the product 111 degrees by removing the walnuts in the paper feed section.

An embodiment of the tension adjusting device for a printing press according to the present invention will now be described in detail with reference to the attached drawings.

1 is a printing machine in which a paper feed section ko and a printing section 3 are arranged in series, the paper feed section ko is provided with a bearing S that supports the roll paper roll, and in front of the roll paper roll there is a pull-out roll 7 passing through a guide roll 6. It is installed on a shaft.

A reverse transfer roll t is disposed at the leading end of the paper feed section, and a step hole 10 for the swinging arm is provided between the tension roll t and the pull-out roll 70.

The axis ε' of the tension roll t connects the powder clutch l/ to the servo motor /2. Servomotor/,
2 always rotates in reverse and transmits the tension roll t when the clutch is engaged.

The pull-out roll 7 is synchronized with the printing section using a pulse motor.

The offset section 3 has two colors in the drawing, and includes a plate cylinder/3°/l, a blank cylinder/S, and an impression cylinder/6, with guide rolls/7. The feed paper passing over the impression cylinder 16 is guided so as not to get caught. Blank cylinder/j and impression cylinder/l
is intermittently pulled out by a pull roll 9 provided at the front side of the printing section 3, and printed while the printing section 3 is stopped. Further, a pair of swinging rolls 20, 2/ is provided between the pull roll /9 and the reversing tension roll t, and while the paper is stopped on the pull roll 19, the swing rolls 20 are moved to move the swing roll 20 to the blank cylinder /!
It is designed to be able to swing and print in accordance with the circumferential speed of i. Furthermore, the loosening and misalignment that occurs between the swinging roll 20 and the reversing tension roll t is caused by the tension roll t described above.
Adjust by reversing.

The pulling roll IT is driven by a pulse motor 22 to pull the paper at a paper pulling time commensurate with each stroke.

The instant pulse motor n determines the printing length, and the operating time of the two motors is determined by the number of pulses, and the output signal of the motor 22 is set to the blank cylinder is.

Further, the pulse of the motor n of the intermittent pulling roll 19 is set by the force of an encoder placed at the front of the pulling roll 19.

The present investigation consists of the above-mentioned '4Y, in which the roll paper l/- supported by the paper feeder y is pulled out through the guide roll 6 at the drawer outlet 7.
t,'E The 10th tensor roll 1 is intermittently pulled out by the intermittent pull roll 9 placed at the tip of the printing section 3, and while the paper is stopped, the oscillating roll 20 pulls out the circumference of the plan cylinder 7.5. While moving according to the speed, the sister pressure cylinder / 6
Printed on the base paper (printing paper) guided by the blank cylinder/S.
Zru.

In addition, if the tension of the base paper pulled from the drawer roll 7 by the pull roll/rip changes due to the movement of the swing roll, the powder clutch of the servo motor, which is constantly rotating in reverse, is turned on to reverse the tension roll. It adjusts to the set tension and applies tension, and can prevent unruliness due to loosening during printing.

As mentioned above, in a printing machine consisting of a paper feeding section and a printing section,
A tension adjustment device for a printing press in which a reversing tension roll is interposed between an erected oscillating roll in a printing department and a pull-out roll in a paper feeding part, the reversely rotating servo motor and a parator clutch being interposed. Because a reversing tension roll was used, the loosening that occurred between the swinging rolls that swing from the pull-out roll was reversed and adjusted to the set tension by inserting a powder clutch, and the tension was adjusted to the set tension. It has the feature of improving printing 1α degree.

[Brief explanation of the drawing]

The drawings show an embodiment of the tension adjustment device for a printing press according to the present invention, and FIG. 1 is a side view, and FIG. 2 is a sectional view of the tension roll. 1~Printing machine Col paper feed section 3~Printing section t~Rolling paper S
~Shaft bearing 6~Guide roll 7~Drawer roll g~Tension roll g'~Shaft Ta swinging arm 10~Step roll //~Powder clutch 7.2~Zerbo motor /
3. /l-~plate cylinder is~plan cylinder /6~impression cylinder /7
．． /g~Guide roll /q~Pull roll 20,27~
Oscillating roll n~pulse motor phantom~encoder patent applicant Mei Seisakusho representative Fujiyoshi Niu

Claims (1)

[Claims] In a printing machine consisting of a paper feeding section and a printing section, a walnut adjustment tension roll is connected between a swinging roll provided in the printing section and a pull-out roll provided in the paper feeding section via a reversing servo motor and a powder clutch. Tension adjustment device in printing press.