JP2001010026A - Method and apparatus for cleaning roller of rotary press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize enhancing of a cleaning work by simultaneously batch cleaning rollers of a rotary press. SOLUTION: A roller group from an ink roller to a blanket cylinder 10 is thrown on, and slowly operated without inserting a sheet to a rotary press. A cleaning liquid is supplied to an ink roller group 16B to be circulated through contact rollers to the cylinder 10, then a doctor is brought into contact with a part of the group 16B, and a cleaning work for scraping and removing a dirt adhering to the roller together with the liquid is repeated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for cleaning a roller of a rotary printing press, and more particularly to a method and an apparatus for cleaning a group of rollers from an ink roller to a blanket cylinder at a time.

[0002]

2. Description of the Related Art In general, rollers of a rotary printing press require periodic cleaning. In addition to the plate cylinder and the blanket cylinder, the rollers of the rotary printing press include an ink roller for supplying ink to the plate cylinder, a watering roller, and the like, all of which are regularly cleaned.

Incidentally, a dedicated cleaning device is used for cleaning the blanket cylinder. This type of cleaning equipment allows the cleaning cloth or brush to be pressed against the surface of the blanket cylinder, and applies the cleaning liquid to the cleaning cloth or brush to indirectly wet the blanket cylinder with the cleaning liquid, or directly applies the cleaning liquid to the blanket cylinder. The surface of the blanket cylinder is cleaned by wiping and scraping off dirt with a cleaning cloth or brush, and the removed dirt is stored in a cleaning unit. When the blanket cylinder is cleaned by such a cleaning device, the cleaning is generally performed with the blanket cylinder removed.

[0004] In addition, the cleaning of the ink roller is performed separately from the cleaning of the blanket cylinder.
In this method, usually, the ink roller group is separated from the plate cylinder by separating the inking roller from the plate cylinder, and the ink source roller is also separated in the same manner, so that only the ink roller group is kept in contact. Then, the cleaning liquid is applied to one roller of the ink roller group, the cleaning liquid is circulated through the ink roller group, and after the ink is sufficiently melted, the attached doctor of one of the ink roller groups is brought into contact, and the ink dissolving cleaning liquid is applied. They are scraped and discarded.

[0005]

However, in the former method of cleaning a blanket cylinder using a cleaning device, a cleaning liquid injection means must be provided inside the cleaning unit, and the removed dirt must be accommodated in the cleaning unit. . For this reason, a mechanism for preventing the dripping of the cleaning liquid is essential for the cleaning apparatus, and a mechanism for accommodating the collected dirt is also required, requiring frequent maintenance work. Furthermore, in the method of wiping and cleaning using a cleaning cloth, since dirt adheres to the cleaning cloth, it is costly to replace it as a consumable, and it is necessary to dispose of used cleaning cloth and cleaning waste liquid as industrial waste. was there. In the latter case of ink roller cleaning, it is necessary to perform the work at the same time as the blanket cylinder cleaning work.However, due to the difference in the method of cleaning the blanket cylinder, the two are completely independent work and the cleaning work efficiency is improved. There was a problem that it was extremely bad.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides a cleaning method and apparatus of a type capable of realizing efficient cleaning by simultaneously and simultaneously cleaning the rollers of a rotary printing press. The purpose is to provide.
In particular, it is an object of the present invention to provide a method and an apparatus suitable for washing rollers of a newspaper printing press.

[0007]

In order to achieve the above object, a method of cleaning a rotary printing press roller according to the present invention is provided in a state in which an ink source roller is separated from a roller group without passing through a rotary printing press. Then, the cleaning target roller group is inserted into the cylinder to perform a slow operation, and the cleaning liquid is circulated to the contact roller group by supplying the cleaning liquid to a part of the roller group, and then a doctor is provided to a part of the roller group. The cleaning liquid is brought into contact with the cleaning liquid, and the dirt attached to the roller is scraped off.

[0008] As another configuration example, the ink supply roller is separated from the roller group without passing through a rotary printing press, and a blanket cylinder is inserted to perform a loosening operation.
The cleaning liquid is circulated between the contact rollers reaching the blanket cylinder by supplying the cleaning liquid to the ink roller group, and thereafter, the dirt adhered to the roller together with the cleaning liquid by contacting a doctor with a part of the ink roller group. It is characterized in that a washing operation for scraping off and removing is repeated.

In these methods, an operation of bringing a brush washer into contact with a blanket cylinder to scrape off contaminants during the circulation of the cleaning liquid between the contact rollers is used in combination, and the cleaning liquid is composed of a solvent and water. What is necessary is just to comprise so that it may supply as an emulsion.

A roller cleaning apparatus for a rotary printing press according to the present invention is provided with cleaning liquid supply means for supplying a cleaning liquid to rollers in an ink roller group of the rotary printing press, and is capable of coming into contact with and separating from the rollers in the ink roller group. After the doctor means and the input of the cleaning mode, the ink source roller is separated from the ink roller group, and then the blanket cylinder roller is inserted to perform a slow operation, and a cleaning liquid injection command to the cleaning liquid supply means is issued. And a controller for controlling to drive the doctor means to the roller contact position after a lapse of a set time.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of a method and an apparatus for cleaning a roller of a rotary printing press according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows a main configuration of a rotary press provided with a cleaning device according to the embodiment. This rotary press is configured to perform double-sided printing, and runs a printing web fed from roller paper (not shown) along a running line W (indicated by a broken line in the figure) to form a pair of blanket cylinders 10.
To perform double-sided printing. A plate cylinder 12 is rolled into contact with each blanket cylinder 10, and the plate cylinder 12
Has a water application roller 14A and a pair of ink application rollers 16
A is transferred, and the image is transferred to the rubber surface of the blanket cylinder 10 by applying ink to the image portion of the plate cylinder 12 and applying water to the non-image portion during the printing operation. The original roller 14B is rotatably contacted with the water application roller 14A, and the ink application roller 16A
Is a kneading roller group 16 for sequentially feeding and kneading ink from an ink source roller 16S on the ink supply source side.
The terminal roller of B is rolled.

The pair of blanket cylinders 10 are placed in a press-fitting position (solid line in the figure) where the printing web passing through the traveling line W is pressed between the printing webs during printing operation, and separated from the printing web and the plate cylinder 12 during non-printing. Body removal position (chain line in the figure)
The following two positions can be taken. This is performed by moving the blanket cylinder 10 in the directions of arrows A (insertion of the cylinder) and B (extraction of the cylinder) by an actuator (not shown). Similarly, the ink source roller 16S is configured to move in the direction of arrow C and be separated from the kneading roller group 16B.

An apparatus for cleaning the blanket cylinder 10 in such a rotary press is configured as follows. First, an injection nozzle 24 is provided as cleaning liquid supply means for supplying a cleaning liquid to a part of the rollers 16Ba constituting the kneading roller group 16B. A plurality of the injection nozzles 24 are arranged along the width direction of the roller, and are configured to uniformly supply the cleaning liquid to the entire roller. Instead of the cleaning liquid spray nozzle 24, a means for applying and supplying the cleaning liquid directly to the roller can be used. For example, a coating sponge arranged along the width direction of the roller 16Ba is provided, and a cleaning liquid supply pipe is inserted into the coating sponge.The sponge is impregnated with the cleaning liquid by supplying the cleaning liquid from the inside, Roller 16B
What is necessary is just to apply by pressing on the surface of a. Further, not only the nozzle type but also a roller type can be used, and any cleaning liquid supply means can be used.

Further, there is provided a doctor means 26 which can be brought into contact with and separated from the other rollers 16Bb constituting the kneading roller group 16B. This is, specifically,
As shown in FIG. 2, it has a doctor blade 27 that is in direct contact with the roller 16Bb, and a tank 28 that contains a cleaning liquid containing dirt scraped off from the roller surface by the doctor blade 27. The doctor blade 27 projects upward from the opening along one side of the tank 28, and is set so that the contact state with the roller 16Bb substantially follows the roller tangential direction. Air cylinders 29 for driving up and down are attached to both ends of the tank 28. By activating the air cylinder 29, the doctor blade 27 is moved up and down together with the tank 28 so that the doctor blade 27 can take any position between a scraping contact state to the roller 16Bb and a non-working state separated from the roller 16Bb. I have.

In the embodiment, the blanket cylinder 10
And a dry brush means 18 which can be transferred to the surface of the brush. It has a brush roller 20 having a rotation axis parallel to the rotation axis of the blanket cylinder 10, which is rotatably driven by a motor and housed in a casing 22. The casing 22 has a window opened at a portion facing the blanket cylinder 10, and the brush roller 20 is opened from this window.
Part of the face. By moving the brush means 18 back and forth with respect to the blanket cylinder 10, the brush roller 20 can be brought into rolling contact with the blanket cylinder 10 to scrape the cylinder surface. Although not shown, a scraper is built in the casing 22 so that dirt attached to the fibers of the rotating brush roller 20 can be removed.

Further, the cleaning apparatus includes a timing for moving the blanket cylinder 10 and the ink source roller 16S to a cylinder insertion position or a cylinder removal position, a timing for bringing the dry brush means 18 into contact with the blanket cylinder, and a timing for cleaning liquid jetting. Control means 3 for setting the timing and the injection time, respectively, for activating the 24 and the doctor means 26
0 is provided. The control means 30 has a control panel 32 and an operation panel 34. The control panel 34 is controlled in accordance with a sequence programmed in advance by a cleaning operation start command to the operation panel 34.
Are designed to open and close a driver 36 such as various electromagnetic on-off valves. As described above, the control unit 30 basically controls each electromagnetic valve constituting the cleaning device, but as described above, the electromagnetic valve for inserting and removing the blanket cylinder 10 of the rotary press as described above. , The rotational speed signal of the rotary press for determining the slow-moving speed, and the cylinder insertion / removal of the ink source roller 16S are also controlled.

A cleaning method using such a cleaning apparatus is performed as follows. First, the web supply to the rotary press is stopped, and the blanket cylinder 10 of the rotary press is slowly operated without inserting the web without passing through the web. This can be achieved by selecting the slow operation mode using the operation panel 34. Next, the cleaning program is started to bring the blanket cylinder 10 into the cylinder loading state, and the ink source roller 16S is separated from the kneading roller group 16B. Thereby, the ink source roller 1
The ink roller group 16, plate cylinder 12, and blanket cylinder 10 except for 6S are all in a rolling contact state.

Next, the jet nozzle 24 for supplying the cleaning liquid is operated to jet the cleaning liquid to the ink roller 16Ba. By supplying the cleaning liquid, the cleaning liquid spreads to all of the ink roller group 16, the plate cylinder 12, and the blanket cylinder 10 in the contact state, and the cleaning liquid circulates around the roller group in the contact state. The time until the cleaning liquid sufficiently circulates and the ink and dirt adhering to each roller swells is set in advance by a timer or the like, and after this set time has elapsed, the doctor means 26 is driven up to drive the roller. 16B
b) so that the cleaning solution in which the dirt is dissolved is scraped off the surface. During this time, since the contact roller group is running slowly, the cleaning liquid remaining in the contact roller group gradually decreases while being stored in the tank 28, and finally reaches a surface dry state.

The brush roller 20 can be brought into contact with the surface of the blanket cylinder 10 while the cleaning liquid is circulated through the contact roller group. As a result, dirt such as ink and paper dust on the surface of the drum is woken up from the sticking state. The operation by the brush roller 20 is not basically for removing dirt, but for raising dirt. This is to make it easy for the adhered dirt to be dissolved in the circulating cleaning liquid. Therefore, the operation by the blanket cylinder 10 may be set so as to be selectively used for the auxiliary operation depending on the degree of contamination of the blanket cylinder.
The number of rotations may be small. The dirt scraped from the rolling contact position of the brush roller 20 circulates between the rollers, is scraped off by the doctor means 26, and is removed.
By using an emulsion composition of a solvent and water in the cleaning liquid, it is possible to dissolve the ink and at the same time, in particular, to use the blanket cylinder 1.
0 can be provided with a function of removing paper dust attached thereto.

Thereafter, a high cleaning effect can be obtained by repeating the supply of the cleaning liquid and the scraping operation by the doctor means 26 as needed. When the cleaning operation is completed by repeating the supply of the cleaning liquid and the scraping by the doctor means 26, the cleaning liquid jet nozzle 24 is stopped, the doctor means 26 is evacuated, the brush roller 20 is detached from the surface of the blanket cylinder 10, and the brush means 18 is removed. The scraper provided inside scrapes off the dirt component adhering to the brush, collects it in the tray in the casing 22, stops its rotation, and further removes the blanket cylinder 10 to complete the cleaning process.

FIG. 3 is a flow chart when the specific processing is performed. (Step 100) After printing, the printing paper is cut to prepare for ink roller cleaning. At this time, the blanket cylinder, the inking roller, and the watering roller are in the “de-asserted” state. (Step 120) The rotary press is operated by "slow motion (7 to 10 rpm)", and the blanket cylinder and the inking roller are respectively put into the roller and put on the roller. (Step 140) Thereafter, the cleaning liquid is supplied to the ink roller. At this time, if the watering roller is also washed, the watering roller is also put on the roller. (Steps 160 and 180) At the timing when the cleaning liquid has sufficiently spread to the ink roller / blanket cylinder, the rotary press is accelerated to about 60 to 125 rpm. (Step 200) At this point, the doctor blade for cleaning the ink roller is put on, and the dissolved ink on the ink roller and the dirt component floating on the blanket are collected in the tray of the doctor. (Steps 220 and 240) When each roller / blanket cylinder is cleaned, the cleaning is completed, the cylinder is removed and the rollers are removed, and the processing is terminated.

When a brush roller type blanket cleaning device is used, the scraping by the brush roller is started at the timing of the step 180, and is ended between the steps 200 to 240. According to such an embodiment, the rollers to be cleaned are put in the body state, and they are brought into rolling contact with each other and then gently operated to supply a cleaning liquid composed of a solvent and an emulsion of water to the group of rolling contact rollers. The dirt on each roller is dissolved by circulating between the rollers, and then the dirt can be removed together with the cleaning liquid by the contact operation of the doctor means. As a result, the roller group from the ink roller to the blanket cylinder can be cleaned at a stroke.
A dedicated cleaning device for the blanket cylinder 10 becomes unnecessary, and simultaneous cleaning of the ink roller group and the blanket cylinder becomes possible.

Further, since the generated dirt can be collectively collected together with the cleaning liquid, inefficient aspects such as the disposal of the nonwoven fabric to which the dirt has been transferred in the dedicated blanket cleaning device must be disposed separately from the ink roller cleaning dirt. Be improved. Furthermore, according to the present embodiment, since consumables such as a cleaning cloth (nonwoven fabric) are not required, no running cost is required except for the cleaning liquid, which contributes to overall cost reduction.

[0024]

As described above, according to the present invention,
After the cleaning target roller group is inserted into the rotary printing machine without paper passing, the cleaning operation is performed slowly, and the cleaning liquid is circulated through the contact roller group by supplying the cleaning liquid to a part of the roller group.
A configuration in which a doctor is brought into contact with a part of the roller group to scrape and remove dirt attached to the roller together with the cleaning liquid, so that the roller cleaning of the rotary printing press can be simultaneously and simultaneously cleaned, thus enabling a cleaning operation. And a method and apparatus particularly suitable for cleaning rollers of a newspaper printing press.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a printing roller portion of a rotary printing press provided with a cleaning device according to an embodiment.

FIG. 2 is an explanatory diagram of doctor means.

FIG. 3 is a flowchart of a cleaning method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Blanket cylinder 12 Plate cylinder 14A Water roller 14B Water roller 16A Ink roller 16B Ink roller group 16S Ink roller 18 Brush means 20 Brush roller 22 Casing 24 Injection nozzle 26 Doctor means 27 Doctor blade 28 Tank 29 Air cylinder 30 Control Means 32 Control panel 34 Operation panel 36 Driver

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[Procedure amendment]

[Submission date] March 9, 2000 (200.3.9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Deleted

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

[MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
A method of cleaning rotary press rollers according to the present invention, without the slow driving rollers extending from the ink roller to the blanket cylinder without passing paper web press to put the trunk, existing washing
By supplying the cleaning liquid from the cleaning liquid supply means to the ink roller group, the cleaning liquid is circulated between the contact rollers reaching the blanket cylinder, and the cleaning liquid is circulated at the timing when the cleaning liquid spreads.
The cleaning operation for scraping off the dirt attached to the roller together with the cleaning liquid by repeating the cleaning operation by increasing the speed of the roller group and bringing a doctor into contact with a part of the ink roller group is repeated.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

In this method , a work of bringing a dry brush washer into contact with a blanket cylinder to scrape off contaminants during the circulation of the washing liquid between the contact rollers is used together, and the washing liquid is composed of a solvent and water. What is necessary is just to comprise so that it may supply as an emulsion.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

A roller cleaning device for a rotary printing press according to the present invention is provided with an existing cleaning liquid supply means for supplying a cleaning liquid to the rollers in an ink roller group of the rotary printing press, and is capable of coming in contact with and separating from the rollers in the ink roller group. After the doctor means and the input of the washing mode, the ink supply roller is separated from the ink roller group, and then the blanket cylinder roller is inserted to perform a slow operation, and the cleaning liquid is supplied to the cleaning liquid supply means. Output injection command,
At the timing when the washing liquid has spread, the ink rollers
It is provided with a controller for controlling to drive the doctor means to the roller contact position after the speed is increased .

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction contents]

[0024]

As described above, according to the present invention,
Blanket the ink roller without passing it through the web
The roller group leading to the torso cylinder is inserted into the cylinder for slow operation, and
Supply the cleaning liquid from the cleaning liquid supply means to the ink roller group.
Between the contact rollers leading to the blanket cylinder
The timing at which the cleaning solution is circulated and the cleaning solution spreads
Speeds up the roller group with a part of the ink roller group
With the cleaning solution by contacting the doctor
Repeat the cleaning operation to scrape and remove dirt attached to the rollers.
Therefore, it is possible to simultaneously wash the rollers of the rotary printing press at the same time, thereby improving the efficiency of the washing operation, and to provide a method and apparatus particularly suitable for cleaning the rollers of a newspaper printing rotary press. it can.

Claims (5)

[Claims] 1. A cleaning operation is performed by inserting a roller group to be cleaned into a rotary printing machine without paper passing through the roller group to perform a slow operation, and supplying a cleaning liquid to a part of the roller group to circulate the cleaning liquid through a contact roller group. Cleaning the roller of a rotary printing press, wherein a doctor is brought into contact with a part of the roller group to remove dirt attached to the roller together with the cleaning liquid. 2. A roller group from an ink roller to a blanket cylinder is inserted into the rotary printing press without paper passing to perform a slow operation, and a cleaning liquid is supplied to the ink roller group to contact the blanket cylinder. Rotary printing, wherein a cleaning liquid is circulated between rollers, and thereafter, a cleaning operation of scraping and removing dirt attached to the rollers together with the cleaning liquid by bringing a doctor into contact with a part of the ink roller group is repeated. Machine roller cleaning method. 3. The method according to claim 1, further comprising a step of bringing a brush washer into contact with a blanket cylinder to scrape off contaminants during circulation of the cleaning liquid between the contact rollers.
Or the method of cleaning a rotary printing press roller according to any one of the above items 2 or 3. 4. The method for cleaning a rotary printing press roller according to claim 1, wherein the cleaning liquid is supplied as an emulsion of a solvent and water. 5. A cleaning liquid supply means for supplying a cleaning liquid to a roller in an ink roller group of a rotary printing press, a doctor means capable of coming in contact with and separating from a roller in the ink roller group, and a cleaning mode input when the cleaning mode is input. After the separation of the ink source roller from the ink roller group, the blanket cylinder roller is inserted to perform a slow operation, and a cleaning liquid injection command is output to the cleaning liquid supply means. A roller cleaning device for a rotary printing press, comprising: a controller for controlling the driving means to a roller contact position.