JPS63268649A - Guide roller-cleaning method for rotary press - Google Patents

Abstract

PURPOSE:To wipe contaminants off a guide roller of a rotary press automatically and speedily, by setting the press into an idling operation while feeding a paper, and causing a guide roller making contact with the running paper to be rotated at a circumferential velocity different from the velocity of the paper. CONSTITUTION:A rotary press is set into a slow speed rotation condition. With a guide roller 26 rotated at a circumferential velocity different from the velocity of a running paper 22, the paper 22 slips on the surface of the guide roller, thereby wiping contaminants such as an ink off the surface. Usually, the surface of the guide roller 26 has an extremely smooth surface condition because of the presence of chromium plating or the like, so that the contaminants can be easily removed by the slipping of the paper 22, without using especially a cleaning liquid or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for automatically removing dirt from a large number of guide rollers disposed on the paper ejection side of a rotary printing press rather than the printing section. More specifically, the present invention relates to a guide roller wiping method in which the paper and the guide roller are wiped with a difference in relative speed between the paper and the guide roller.

[Prior Art] A rotary press for printing newspapers usually has a configuration in which three to four printing units are arranged in parallel. An example is partially shown in FIG. 2, in which only two printing units are shown to simplify the drawing. Each printing unit IO includes a printing section 16 including a blanket cylinder 12 and the like, and a paper feeding section 20 holding a web 18. Paper feed section 20
The running paper 22 pulled out from the
The printer is guided by a plurality of guide rollers 26 to reach the printing section 16, where it is printed, and then guided by a plurality of guide rollers 26 to a folding machine (not shown).
Cutting and folding are then performed.

Usually, about 15 to 20 guide rollers 26 are installed on the paper discharge side of the printing section 16, that is, between the printing section 16 and the folding machine. These guide rollers 26, especially the 4 to 6 guide rollers close to the printing section 16, come into contact with the running paper immediately after printing, so a lot of ink and paper dust (adheres to them).The guide rollers 2
The surface of No. 6 is polished and chrome-plated to make it smooth, making it difficult for ink and paper dust to adhere to it, but it still ends up getting dirty when a large amount of printing is done.

When the guide roller 26 becomes dirty, the surface of the printed paper becomes slightly stained, and the deposits create unevenness, which tends to cause vertical wrinkles in the running paper, resulting in serious defects that reduce the quality of printed matter.

Therefore, it is necessary to wipe off the dirt on the guide rollers when replacing the plate or when printing is finished.

In the case of blanket cylinders, special cleaning equipment has already been developed and cleaning can be carried out automatically, but suitable cleaning technology has not yet been developed for the large number of guide rollers, and the current state is that they rely on manual labor. It is.

[Problem to be Solved by the Invention 1] In the case of a newspaper rotary press having three to four printing units, printing work is normally performed by four to six workers. In this case, cleaning the guide roller requires 3 to 4 workers for 15 to 2 hours.
It takes about 0 minutes, which has the drawback of causing a very large time and economic loss. In addition, it is not only an unwelcome task as it stains the body and clothes as it requires entering the inside of a complicated device that is covered with ink, etc., but also has other problems such as being dangerous due to the high place and slippery environment.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method that eliminates the drawbacks of the prior art as described above and can automatically wipe off dirt on guide rollers of a rotary printing press in a short period of time.

[Means for Solving the Problems] The present invention, which can achieve the above objects, operates the rotary printing machine in slow motion with the girder on, and guide rollers in contact with the running paper are This is a wiping method for a guide roller that rotates so that its peripheral speed is different from the speed of the running paper and wipes away dirt with the running paper.

Here, the puncturing of the paper feeding section may be left in the normal state, or may be weakened or eliminated depending on the case.

[Effect]

Set the rotary printing press to slow running mode rs (operate at a safe, slow speed to inspect and adjust each part of the printing press).

When the guide roller is rotated at a circumferential speed that is different from the speed of the running paper, the running paper slips on the guide roller surface, and the adhered and hardened dirt such as ink is wiped off by the running paper. 6 Normally, the surface of the guide roller is as described above. Although the surface is kept extremely smooth by chromium plating or the like, stains can be removed very easily due to the slippage of the running paper, even without the use of cleaning liquid.

[Example] FIG. 1 is a conceptual diagram showing an example of a guide roller wiping device suitable for carrying out the method of the present invention.

This device includes a plurality of guide roller drive mechanisms 32,
It is composed of a control section or an operation panel (both not shown) that control these operations.

The guide roller drive mechanism 32 is attached to each guide roller 26 on the paper ejection side than the printing section 16,
For example, a gear portion 44 is formed at the end of the guide roller 26, and the transmission gear 46 that meshes with the gear portion 44 is driven by a motor ( The gear part 44 and the transmission gear 46 are attached to a rotating shaft (not shown) and swung by the arm 52 so that the gear part 44 and the transmission gear 46 can be engaged with each other and separated from each other. Such a guide roller drive mechanism 32 is attached to each guide roller 26 (especially 4 to 6 guide rollers immediately after the blanket cylinder) on the paper discharge side than the printing section 16.

In addition, in this device, as shown in FIG. 1, a rotation sensor 5 is provided near the guide roller 26 to detect the presence or absence of rotation thereof.
6 is attached, but it is not necessary.

A drag roller for running the paper is provided within the folding machine or just before it. If the pinch roller, which supports the running paper with pressure between it and the drag roller, has insufficient pressure, or if the pressure is only in a small area, apply sufficient pressure over the entire axial length of the drag roller. It is better to have a structure that can be firmly compressed and to improve it so that a strong tensile force can be applied evenly over the entire width of the running paper.

The present invention is carried out as follows in a zero-wheel printing machine, in which running paper is pulled by a drag roller in or near the folding machine while it is being folded, and the running paper is pulled in a slow motion. Tenshicon is lO~20kg
The running paper is pulled by the drag roller and the pinch roller, and runs against the frictional force between the back tensicon and the guide roller.

The running paper comes into contact with the dirty guide roller 26.

A large number of guide rollers 26 are incorporated, and generally the guide rollers used differ depending on printing conditions. In other words, the running paper does not always follow a fixed route, but the running route is determined by selecting a guide roller according to printing conditions etc. The 0 rotation sensor 56 is connected to the guide roller 26.
The rotation of the guide roller is detected to determine whether the guide roller is currently being used. Regarding the guide roller 26 to be wiped (currently in use), the transmission gear 46 is engaged with the gear portion 44 of the guide roller, and the guide roller 26 is rotated at an appropriate speed by driving the motor. Since the speed is slow, about 15 to 20 rpm, there is no problem even if the transmission gear 46 is suddenly engaged with the gear portion 44. The guide roller 26 may be rotated so as to rotate the guide roller 26 faster or slower than the traveling paper 22. Therefore, the guide roller 26 may be rotated in the normal direction or in the reverse direction.

Since the speed of the running paper 22 and the circumferential speed of the guide roller 26 are relatively different, the running paper 22 slips on the surface of the guide roller 26, and the attached dirt is wiped off. Since the surface of the guide roller 26 is smooth and polished and chrome-plated, dirt can be wiped off very easily by simply slipping the running paper 22 thereon. When the wiping operation is completed, the transmission gear 46 is returned to its original position, and the guide roller 26 returns to a freely rotatable state and rotates at the speed of the running paper.

Although a preferred embodiment of the present invention has been described in detail above, it is to be understood that the present invention is not limited to only such a configuration. If the pulling force from a drag roller or the like is weak, the back tension controller in the paper feed section may be weakened or eliminated, but this adjustment is cumbersome, so if possible, it is best to apply regular back tension as in the above example. It is better to be able to do it as is.

Furthermore, the configuration for rotating each guide roller at an appropriate speed can be changed as appropriate. It is not necessarily necessary to rotate continuously,
The rotation may be stopped repeatedly intermittently.

[Effects of the Invention] As described above, the present invention is constructed so that the guide roller is rotated at a speed relative to the running paper to wipe away dirt, so the device is relatively simple and does not require much space. It can be fully integrated into existing rotary printing presses, and above all, it has the excellent effect of eliminating the need for manual wiping work inside the narrow and intricate rotary printing press.

In addition, in the present invention, since the paper remaining after the brush can be used for wiping, there is no need to take the trouble of attaching a non-woven cloth for wiping, which improves printing quality, shortens work time, and improves work safety. It has extremely excellent effects in terms of.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram showing an example of a guide roller wiping device suitable for implementing the present invention, and FIG. 2 is a partial explanatory diagram showing the schematic configuration of a rotary printing press. lO...Printing unit, 16...Printing section, 20...
- Paper feeding section, 22... Running paper, 26... Guide roller, 32... Guide roller drive mechanism, 46... Transmission gear. Patent Applicant Futatsuka Co., Ltd. Managing Director Shigemi Dan Figure 1 Figure 2

Claims (1)

[Claims] 1. The rotary printing machine is operated slowly with the paper threaded through it, and the guide roller that is in contact with the running paper rotates at a peripheral speed different from the running speed of the running paper, thereby wiping away dirt with the running paper. A guide roller cleaning method for a rotary printing press.