JPS62132644A - Washing method for rotary printing machine and its device - Google Patents

Abstract

PURPOSE:To enable ink washing to be performed in a shot period of time and improve work safety and operational efficiency by running detergent-impregnated paper through a paper passage and then paper which does not allow impregnation of a detergent. CONSTITUTION:The circumferential surfaces of an impression cylinder blanket cylinders, guide rollers 4, 4... and turn bar which are located at a paper passage for paper 1 are washed with detergent impregnated into paper 1 which is passed in the same manner as when printing is performed. After this, said circumferential surfaces are continuously wiped using the non-detergent impregnated paper 1. The washing operation of the circumferential surfaces of the impression cylinder, blanket cylinders 2, 2, guide rollers 4, 4... is carried out subsequent to printing process upon its termination. Thus washing operation can be performed in a short time without any time loss immediately after the printing process. In addition, wipe-off operation is dispensed with, eliminating any dirtry work at a dangerous position. Significantly effective results can be obtained in such aspects as work safety and efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rotary printing press that performs printing by threading paper from a paper feeding section through a printing section to a processing section such as a folding section.
More specifically, the present invention relates to a cleaning method and apparatus for cleaning ink piled on the surface of each member on a paper path, including guide rollers, turn bars, impression cylinders, and blanket cylinders.

In printing using conventional rotary printing presses, printing speeds have been significantly increased with the aim of improving printing efficiency, but on the other hand, despite improvements in ink, the time required for drying of ink transferred to the paper surface continues to increase. Despite the significant shortening, the amount of ink that piles up on guide rollers, turn bars, etc. that come into contact with the paper surface on which the ink is not yet dry tends to increase as the speed of printing progresses.

Conventionally, various means for dealing with the above phenomenon have been proposed and implemented.

For example, as a countermeasure for guide rollers and turning pars, there are examples of providing unevenness on the surface of the guide roller to reduce the contact area on the printing surface as shown in Japanese Utility Model Publication No. 36-22312, and Japanese Utility Model Publication No. 39-22312. No. 12514, Jitko No. 39-26949, Jitko No. 4'? -42087, Japanese Utility Model Publication No. 53-1344g, etc., where gas is blown from the circumferential surface of a guide roller or turn bar to guide the printed surface so that it does not come into contact with the roller or turn bar; According to the trenches, turn bars are listed in the "Printing Encyclopedia" (Ministry of Finance Printing Bureau, published November 10, 1978, No. 3).
As described on page 235 of the printing press, in addition to the means for blowing out the gas, by rotating the bar little by little,
As shown in Figure 6, when the bar is in a fixed state, the contact point on the upstream side in the running direction of the paper is shown on the bar circumferential surface where ink piling is likely to occur, and on the downstream side as shown in Figure 6. There is an example in which the contact points are gradually shifted and the slight pile of ink that occurs is scraped off with paper.

Problems to be Solved by the Invention In the above-mentioned conventional examples, countermeasures for the guide rollers and turn bars include minimizing the chances of the printed surface coming into contact with the guide rollers and turn bars, reducing the contact area, or piling. Although it is possible to reduce ink piling in this conventional example, it is impossible to eliminate it completely, and in the end, printing Workers had to wipe it down after the operation was completed. Guide rollers and turn bars are located at high places, the above work is dangerous, and there are a large number of them, so
It takes a long time to work, and since the paper gets in the way during the wiping process, it has to be cut and then threaded through the paper again after the wiping process, resulting in operational waste.

Means for Solving the Problems The present invention has been made in view of the above-mentioned problems, and is capable of cleaning ink piled on the surface of each member on the paper threading path in a short time after the printing process is completed. Furthermore, the present invention aims to provide a cleaning method and device for a rotary printing press that can improve work safety and work efficiency without requiring workers to do dirty work in dangerous positions. The method is to impregnate the paper with a cleaning liquid and run it along the paper threading path, then stop impregnating the paper with the washing liquid and run the paper that is not impregnated with the cleaning liquid through the paper threading path.

Further, the apparatus for carrying out the above method is configured such that the supply of the cleaning liquid to the paper can be interrupted and that a cleaning liquid impregnating means is provided on the upstream side of the paper threading path.

Function: In the cleaning method and apparatus for a rotary printing press described above, after printing is completed, the rotary printing press is operated at an inching speed with the paper threaded through it, and a cleaning liquid is applied to the running paper using a cleaning liquid impregnating means. The paper is impregnated with the cleaning liquid and runs, supplying the necessary and sufficient amount of cleaning liquid to the guide rollers, turn bars, and even the blanket cylinder in the impression cylinder.Then, the paper is impregnated with the cleaning liquid. By continuing to run the paper with the paper stopped, the cleaning liquid releases ink piled on the circumferential surfaces of the guide roller, turn bar, impression cylinder, blanket cylinder, etc., and then wipes it with the paper. and complete cleaning of the piled ink on each part.

Example Embodiments of the present invention will be described below based on the drawings.

When printing newspapers using a rotary printing press, for example, an offset rotary printing press, as shown in FIG. , and a single folding section C to form one printing set.

Then, the paper is threaded through the printing section B, which is mounted in a rolled state on the paper feed section A, to the folding section C, where it is printed on the blanket cylinder 2.2 of the printing section B, and then printed. They are sequentially pulled by drag rollers 3.3 provided downstream from section B, and are pulled by guide rollers 4.4. . . . is introduced into the folding section C through the turner 5.

Blanket cylinder 2.2 of printing section B of printing section B paper 1
Further upstream and on both sides of the paper threading path, cleaning liquid impregnating means 10 for impregnating the paper 1 with cleaning liquid is provided.

As shown in FIG. 2, the cleaning liquid impregnating means 10 includes a fountain +01 that stores cleaning liquid, a fan roller 102 that is rotatably supported while being partially immersed in the cleaning liquid in the fountain 101, and this fan roller. roller 102
It is rotatably supported in contact with, for example, the axis of the fan 770-5102, and is in contact with the paper I running on the paper threading path! (the solid line position in Figure 2) and the standby position (the chain line position in Figure 2), and are provided so that they can be fixed by fixing members (not shown) in each of the above-mentioned positions. It consists of a roller +03 having a length spanning the entire width and onto which the cleaning liquid is applied.

FIG. 3 shows the other side of the cleaning liquid impregnating means IQ,
This cleaning liquid impregnating means H' consists of a nozzle 106 capable of spraying the cleaning liquid over the entire width of the paper g, a cover 107 for preventing the cleaning liquid from scattering, and a saucer 1o8 for receiving the cleaning liquid dripping.

In the embodiment shown in FIG. 2, either the fan tin roller 102 or the cleaning liquid layer may rotate either the roller 103 or the roller 103.

During the printing operation, the paper 1 is printed as it passes between the blanket cylinders 2 on the paper threading path, lines are applied to both sides of the paper, and the paper is pulled by a drag roller 3. Since the ink forming the image area applied on both sides of the paper stock 1 takes some time to dry, guide rollers 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 3, 4, 2, 3, 4, 4 ink are applied to the printing paper 1 on the downstream side of the blanket cylinder 2, 2, in the running direction of the paper 1. ...Undried ink piles on the track and turn par 5. Furthermore, undried ink naturally remains on the impression cylinder and blanket cylinder.

Therefore, after the printing operation is finished, the supply of ink is stopped, the printing paper 1 is made to run, and the operating speed is set to about inching, and the washing liquid impregnating means + 0 is applied to the printing paper 1, which continues to run.
, impregnate with cleaning solution at IO'.

At this time, in the cleaning liquid impregnating means 10 shown in FIG. 2, the cleaning liquid layer reroller 103 is oscillatedly moved from a standby position to a position in contact with the paper 2 by a drive member (not shown) and fixed, and the fan tin roller 103 is moved from the inside of the fountain lot to The cleaning liquid layer taken out by +02 may be impregnated into the paper 1 through the roller 103, and the cleaning liquid impregnating means 1 shown in FIG.
At 0', the cleaning liquid may be jetted toward the paper 1 from the nozzle 106.

The paper 1 impregnated with the cleaning liquid by the above operation reaches the folding part C through the same path as during printing, so during this time, the bracket 2.2, the guide roller 4, 4, . . .
A cleaning liquid is supplied to the curved portion of the turner 5 and the like. Then, the cleaning liquid impregnating means 10° 10' impregnates the paper l with the cleaning liquid, the blanket cylinder 2.2, the guide rollers 4, 4. . . . as much as is necessary and sufficient for the peripheral surface of the turner 5, etc., that is, the blanket cylinder 2.2 and the guide rollers 4, 4. ......, the ink piled on the curved parts of the turner 5 etc. can be released from these curved parts and floated in the cleaning solution until enough cleaning solution is supplied, and the supply of the cleaning solution is necessary. When a sufficient amount of washing is completed, impregnation of the paper 1 with the washing liquid by the washing liquid impregnating means 10 and IO' is stopped. At this time, the cleaning liquid impregnating means 10 shown in FIG.
03 can be fixed by swinging from the position in contact with the paper 1 to the standby position, and the cleaning liquid impregnating means 10' shown in FIG.
Now, it is sufficient to stop spraying the cleaning liquid by the nozzle +06.

Even after the impregnation of the cleaning liquid into the paper paper I is stopped as described above, the paper paper I continues to travel along the same path as during printing, so that the blanket cylinder 2.2, guide rollers 4.4.
・・・・・・The supply of cleaning liquid is stopped, and the cleaning liquid that is continuously supplied to the peripheral surface of the turn bar 5, etc. is wiped off, and the piles floating in the supplied cleaning liquid are removed. Dirt such as ink is wiped off together with the cleaning solution, and cleaning is completed.

Furthermore, in order to more effectively perform the cleaning by supplying the cleaning liquid and wiping, a braking means 8 for braking the rotation of the guide roller 4 is provided as shown in FIG. 4, and a braking means 8 is provided as shown in FIG. It is effective to provide a drive means 9 so that the surface of the guide roller 4 can move at a speed different from the running speed of the paper 1.

The manual brake g shown in FIG.
A presser member 81 that presses the presser member 81, and a presser member 81 that presses the
and a drive member g2 for reciprocating between a position in contact with the shaft part 41 and a position away from the shaft part 41. During the above-mentioned cleaning, the holding member 81 is set in a position in contact with the shaft part 41, and the guide roller 4
Braking is performed so that the circumferential speed of the paper 1 is slightly slower than the running speed of the paper 1, and the holding member 81 is separated from the shaft portion 41 during printing.

The driving means 9 shown in FIG.
The pulley 91 provided in the drive member 94 and the drive member 94
pulley 92 attached to the shaft of
, Endless belt 93 Eri passed between 92,
During the cleaning, the drive member 94 moves the two pulleys 91,
92 and endless belt 93, the guide roller 4
The guide roller 4 is rotated so that its circumferential speed becomes a speed t different from the running speed of the paper 1, and during printing, the guide roller 4 is rotationally driven so that the circumferential speed of the guide roller 4 becomes the same as the running speed of the paper 1. In addition, the above two pulleys 9+, ? 2 or both may be provided with a clutch mechanism (not shown) so that the guide roller 4 can freely rotate during printing.

In addition, in the example shown in FIGS. 4 and 5 above, one braking means and one driving means q are provided for one guide roller 4, but the desired effect is not achieved. However, if an effect can be obtained, braking or driving a plurality of guide rollers by one braking means or one driving means does not deviate from the gist of the present invention.

Furthermore, in addition to the embodiments shown in FIGS. 4, 9, and 5, each guide roller 4 is provided with a reciprocating means for reciprocating the guide roller 4 in the axial direction. The wiping effect of the paper 2 may be improved by reciprocating in the axial direction.

In the embodiment described above, the cleaning liquid impregnating means 10 is installed upstream of the printing section ((position A1)). The rollers and turn bars will be mainly cleaned, and if the printing cylinder is cleaned with trip-on,
Even the printing cylinder can be cleaned.

Further, the cleaning liquid impregnating means 10 is installed downstream of the printing section, for example (b).
, (c), the guide roller and turn bar should be cleaned exclusively, and the printing cylinder should be cleaned using another cleaning method, such as using a known cleaning device specifically for the impression cylinder or blanket cylinder. good.

Note that the cleaning liquid impregnating device go is, for example, (a), −1°el
Not only should it be installed in one location, but also in multiple locations as necessary, such as Kl, (01, ke), (c), (b).
.

(/1, ke), (b), (c), etc. can be provided freely in terms of design.

Effects of the Invention According to the cleaning method according to the present invention, the impression cylinder, the blanket cylinder 2゜2, and the guide roller 4 located in the paper passing path of the paper 1
,4. . . . Surfaces such as turn bars are impregnated with the threaded paper 1 in the same way as during printing, and cleaned with a cleaning solution.
Thereafter, continuous wiping is performed using paper 1 that is not impregnated with cleaning liquid, and the impression cylinders, blanket cylinders 2, guide rollers 4, 4, . . . . etc. is carried out immediately after the printing operation is completed, and the cleaning work is carried out in a short period of time, which is consistent with this printing process. can be done. Moreover, since the wiping work by the worker is eliminated, the worker is no longer required to do dirty work in a dangerous position, and significant effects can be obtained in terms of work safety, work efficiency, etc.

On the other hand, according to the apparatus for carrying out the above-mentioned cleaning method, the structure is simply that the paper running along the paper threading path is impregnated with the cleaning liquid, so the structure is simple, the manufacturing cost is low, and the paper is easy to clean. Since it can be freely installed at any suitable position near the paper threading route or upstream of the paper threading route of the part to be cleaned, adjustment, inspection, and maintenance are extremely easy and the device is fully effective. It has great effects not only in terms of work, but also in terms of management, such as being able to extend the life span of the equipment and prolonging the life of the equipment.

In the embodiment in which the cleaning liquid impregnating means 1o is provided at the position (A), the conventionally known cleaning device R dedicated to the impression cylinder and blanket cylinder is omitted when cleaning the printing cylinder in a trip-on state. It is also possible.

[Brief explanation of drawings]

FIG. 1 is a front view schematically showing an offset rotary printing press showing an example of an embodiment of the present invention, FIGS. 2 and 3 are front views schematically showing an embodiment of a cleaning liquid impregnating means, and FIG. 5 is a perspective view schematically showing a control means for the guide roller, FIG. 5 is a perspective view schematically showing a drive means for the guide roller, and FIG.
The figure is a sectional view of the turn bar in a state where paper is threaded through. 1. Paper, IO and IO' are cleaning liquid impregnation means.

Claims (2)

[Claims] (1) In a rotary printing machine that prints by threading the paper from the paper feed section through the printing section to the processing section such as the folding section,
A cleaning method for a rotary printing press, characterized in that the paper is impregnated with a cleaning liquid and runs along a paper threading path, then the impregnation of the paper with the cleaning liquid is stopped, and the paper that is not impregnated with the cleaning liquid continues to run. (2) In a rotary printing machine that prints by threading the paper from the paper feed section through the printing section to the processing section such as the folding section,
A cleaning device for a rotary printing press, characterized in that a cleaning liquid impregnating means capable of intermittent supply of cleaning liquid to paper is provided on the upstream side of a paper threading path.