JPH0412856A - Ink roller cleaning apparatus of press - Google Patents

Abstract

PURPOSE:To transfer a cleaning liquid to a rider roller to clean the rider roller at the same time as the other ink roller by providing a roller receiver which supports the rider roller replacing a machine cleaner at the position of the machine cleaner to confront in contact with one of a group of ink rollers during cleaning of the ink rollers. CONSTITUTION:When cleaning is performed after printing, a rider roller 19 is detached and a machine cleaner 15 is mounted. The detached rider roller 19 is supported by a bearing 20 to be dropped over a vibrating roller 6 via an ink up roller 25. While each roller is rotated confronting in contact with each other, and a doctor knife 16 of the machine cleaner 15 is placed in contact with the peripheral surface of the vibrating roller 9, a cleaning liquid in the tank is jetted out from a nozzle 14. As a result, the cleaning liquid is transferred among the rollers, thereby cleaning the rollers. The cleaning liquid is scraped by the doctor knife 16 provided in the machine cleaner 15 and collected within a container 17. Accordingly, the ink rollers can be automatically cleaned with ease.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a printing press that supplies a cleaning liquid to a group of ink rollers to clean it, and scrapes the drained liquid after cleaning with a doctor knife and collects it in a container. This invention relates to an ink roller cleaning device.

[Conventional technology]

The printing units of various printing machines are equipped with a plate cylinder with a printing plate attached to its circumferential surface, and above the plate cylinder there is an inking device that supplies printing ink to the surface of the printing plate. It is provided. This inking device includes an ink fountain roller that rotates within an ink fountain, a swing roller disposed on the side of the ink fountain roller, and a transfer roller that alternately contacts both rollers by swinging an arm. Below the swinging roller, a large number of roller groups consisting of swinging rollers, kneading rollers, rider rollers, etc. are arranged with their peripheral surfaces facing each other in sequence.
A plurality of inking rollers supported by arms are provided between the pair of swinging rollers, which are the final rollers, and the plate cylinder, and are formed so as to be detachable from the plate surface by swinging of the arms.

With this configuration, the ink stored in the ink fountain adheres to its surface as an ink film as the ink fountain roller rotates, and this ink film is transferred to the swing roller by the reciprocating movement of the transfer roller. After being transferred, it is transferred between the roller groups to be evenly leveled in each direction and transferred to the swinging roller. The ink transferred to the shaking roller is supplied to the printing plate by a plurality of ink forming rollers, and an image is formed on the printing plate using this ink and dampening water supplied by the water supply device.

The inking device of such a printing press includes all 47-1
-o- An ink roller cleaning device is attached that cleans the ink rollers at the same time. This ink roller cleaning device includes a tank storing ink cleaning liquid and a compressor, which are connected to a nozzle provided at the upper end of the inking device.

A machine cleaner is disposed near the swing roller at the lower end of the inking device, and is supported by a bracket and has a doctor knife whose tip is brought into contact with the circumferential surface of the swing roller. By doing this, when changing colors or finishing printing work, etc., the rollers are rotated in contact with each other, and the doctor knife of the machine cleaner is rotated and the push button etc. is pressed with the machine cleaner's doctor knife in contact with the circumferential surface of the rollers. When the compressor is operated and the cleaning liquid in the tank is jetted out from the nozzle, the cleaning liquid transfers between the rollers and cleans them, and is scraped into the container of the machine cleaner with a tractor knife and collected.

When starting printing after cleaning, the machine cleaner is removed, and a rider roller is installed in its removal position, facing the ink forming roller, in order to prevent printing failures called roller eyes. .

S Problems to be Solved by the Invention] However, in the conventional ink roller cleaning device, as mentioned above, a machine cleaner is attached during cleaning, and the removed rider roller is not cleaned by the ink roller cleaning device. Another problem is that cleaning must be done manually, which requires a large amount of labor and also hinders the automation of cleaning.

[Means to solve the problem]

In order to solve these problems, the present invention provides an ink roller cleaning device for a printing press, in which a rider roller is installed in place of the machine cleaner consisting of a doctor knife and a container at the position where it is removed during printing operations. A roller receiver is provided to support one of the ink rollers in opposition to it.

[Function] When operating with a rider roller attached during printing, the ink on the ink roller is leveled between the rider mouth and the arm, thereby preventing printing problems such as roller marks.

When cleaning the ink roller, remove the rider roller, install a machine cleaner in its place, and operate the removed rider roller with it supported on the loader holder.The cleaning liquid is transferred to this rider roller and the other ink rollers are cleaned at the same time. .

〔Example〕

1 to 4 show an embodiment of the ink roller cleaning device for a printing press according to the present invention, FIG. 1 is a front view of the upper end of a printing unit in which this is implemented, FIG. 2 is a side view, and FIG. 3 is a plan view, and FIG. 4 is a schematic front view of a printing unit embodying the present invention. In the figure, a printing unit 1 is provided with a plate cylinder 2 having a printing plate attached to its circumferential surface, and above the plate cylinder 2 is an inking device 3 that supplies printing ink to the surface of the printing plate. is provided. This ink unit H3 has an ink fountain roller 5 that rotates within the ink fountain 4, a swing roller 6 disposed on the side thereof, and a transfer roller 7 that alternately contacts both rollers 56 by swinging of the arm. It is equipped with

Below the swinging roller 7, a large number of roller groups 8 consisting of swinging rollers, kneading rollers, rider rollers, etc. are arranged with their peripheral surfaces successively facing each other, and a pair of swinging rollers 9 and 10 are the final rollers. A plurality of ink forming rollers 11 supported by an arm are provided between the plate cylinder 2 and the plate cylinder 2 so as to be detachable from the plate surface by swinging of the arm. 1
2 is a water supply device that supplies dampening water to the printing plate.

The inking device 3 of such a printing press is equipped with an ink roller cleaning device that cleans all the roller groups at the same time. This ink roller cleaning device includes a tank storing cleaning liquid and a compressor (both not shown), which are connected to a nozzle 14 provided near the upper swinging roller 6. At the lower end of the inking device 3, a machine cleaner 15 is arranged close to the swinging roller 9.
The doctor knife 16 is supported by a container 17 extending in the machine width direction. And machine cleaner 15
The container 17 is removably supported by frames 18 on both sides via brackets, and this apparatus is provided with a rider roller 19 that is attached in place of the machine cleaner 15 that is removed during printing operations. The rider roller 19 is dropped by its own weight and is brought into contact with the ink forming roller 11, and is configured to even out the ink on the ink forming roller 11.

Furthermore, this apparatus is provided with a device that cleans the rider roller 19, which is removed when cleaning the ink roller, at the same time as other ink rollers. That is, on the upper surface of the left and right frames 18, a bearing plate 20 formed in an L shape and having a square hole 20a is located above the upper swinging roller 6 and fixed with a bolt 21. The removed rider roller I9 is placed in the groove 20b formed in the vertical member.
A rolling bearing 22 is rotatably fitted to the end shaft of the shaft so as to be vertically movable. Further, another bearing plate 23 formed in an inverted shape is fixed to the bearing plate 20 with a port 24, and the vertical member of this bearing plate 23 is connected to the square hole 2.
0a and formed in the vertical member 2
An end shaft 25a of an ink up roller 25 disposed between the rider roller 19 and the swinging roller 6 is fitted into the shaft 3a so as to be vertically movable. By doing this, after dropping the ink up roller 25, the rider roller 19
These rollers 6.25.1 by dropping
9 are configured to face each other and rotate at the same time.

With this configuration, the rider roller 1
When the machine is operated to start printing with the ink fountain roller 9 facing the ink forming roller 11, the ink 13 stored in the ink fountain 4 forms an ink film on its surface due to the rotation of the ink fountain roller 5. This ink film is transferred to the swinging roller 6 by the reciprocating movement of the transfer roller ruff, and then transferred between the roller groups 8 to be uniformly leveled in each direction and transferred to the swinging roller 9. Transfer to IO. The ink transferred to the swing rollers 9 and 10 is supplied to the printing plate by a plurality of ink forming rollers 11, and an image is formed on the printing plate using this ink and dampening water supplied by a water supply device 12.

In this case, the rider roller 19 is held against the ink forming roller 11 so that the ink is evenly distributed, thereby preventing printing defects such as roller marks.

When the printing work is finished and the ink roller is cleaned as a preparatory work such as color change, the rider roller 19 is removed and the machine cleaner 15 is installed in its place, and the removed rider roller 19 is supported by the bearing 20. The ink is dropped onto the shaking roller 6 via the ink amplifier roller 25. Then, each roller is rotated so as to be in contact with each other, and the doctor knife 16 of the machine cleaner 15 is swung and the compressor is operated by operating a push button or the like while the doctor knife 16 is in contact with the peripheral surface of the roller 9, and the cleaning liquid in the tank is drained. When ejected from the nozzle 14, the cleaning liquid transfers between the rollers and cleans them, and is scraped into the container 17 by a tractor knife 16 provided in the machine cleaner 15 and collected. In this case, since the rider roller 19 is in contact with the swinging roller 6 via the ink up roller 25, the writer roller I9 is also cleaned at the same time as the other ink rollers.
There is no need to wash separately.

1. Effects of the Invention] As is clear from the above description, according to the present invention, in an ink roller cleaning device for a printing press, a rider roller is provided which is attached to a position where a machine cleaner consisting of a doctor knife and a container is removed during printing work, By providing a roller support that supports this rider roller in opposition to one of the ink roller groups during ink roller cleaning,
The removed rider roller can be cleaned at the same time as the other ink rollers instead of the machine cleaner.
Compared to the conventional method, which requires separate cleaning, labor is reduced, preparation time is shortened, and productivity is improved. Additionally, it becomes easy to automate ink roller cleaning.

[Brief explanation of drawings]

1 to 4 show an embodiment of an ink roller cleaning device for a printing press according to the present invention, FIG. 1 is a front view of the upper end of a printing unit in which this is implemented, FIG. 2 is a side view, 3 is a plan view, and FIG. 4 is a schematic front view of a printing unit embodying the present invention. 6... Swinging roller, 9... - Swinging roller, 11
... Ink forming roller, 14 ... Nozzle, 15.
... Machine cleaner, 16 ... Doctor knife, 2
0.23... Bearing plate, 25... Ink up roller. Patent applicant Komori Printing Machinery Co., Ltd.

Claims (1)

[Claims] A cleaning liquid is supplied to a group of ink rollers that rotate with their circumferential surfaces facing each other to clean the ink rollers, and the drained liquid after cleaning is scraped off with a doctor knife whose tip is in contact with one of the ink roller groups. In an ink roller cleaning device of a printing press that collects the ink rollers into a container, a rider roller is installed at a position where the machine cleaner consisting of the doctor knife and the container is removed during printing work, and when cleaning the ink rollers, this rider roller is installed in the ink roller group. An ink roller cleaning device for a printing press, characterized in that it is provided with roller supports that are opposed to each other and supported.