JP2017177689A - Printer and method of cleaning printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer having an applicator that enables simultaneous and automatic cleaning of a furnisher roller and of the applicator.SOLUTION: A printer 1 comprises a plate cylinder 12; a furnisher roller 13 which is disposed around the plate cylinder 12 and supplies an ink 5 to the plate cylinder 12; an applicator 14 which is disposed around the furnisher roller 13 and supplies the ink 5 to the furnisher roller 13; and a cleaning nozzle 20 which supplies a cleaning liquid for cleaning the plate cylinder 12, the furnisher roller 13, and the applicator 14. The cleaning nozzle 20 can selectively supply cleaning liquid toward between the plate cylinder 12 and the furnisher roller 13, and between the furnisher roller 13 and the applicator 14.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a printing machine used for gravure printing, and a method for cleaning a plate cylinder and a finisher roller of the printing machine.

  Conventionally, in a gravure printing machine, after the printing of the web is completed, the plate cylinder of the printing machine is used to prevent clogging of the plate cylinder and to prevent color mixing between the ink used in printing and the ink used in the next printing. The cylinder and the finisher roller are washed to wash off the ink. When performing this cleaning process, an operator manually supplies the cleaning liquid to the plate cylinder and the finisher roller.

  Therefore, in order to clean the conventional plate cylinder and the finisher roller, an operator must work close to the printing press, which is labor-intensive and the operator is required to rotate the plate cylinder and the finisher roller. There is a risk of accidents involving them. In order to solve such problems, Patent Document 1 has a nozzle for supplying a cleaning liquid from above to the contact portion between the plate cylinder and the finisher roller, and the plate cylinder and the finisher roller are connected to each other. Describes an apparatus for cleaning the plate cylinder and the finisher roller by rotating in a direction opposite to the rotation direction for the plate.

JP-A-4-85042

  However, in the apparatus described in Patent Document 1, when the printing press has an applicator for supplying ink to the finisher roller, the ink that has been washed off is stored between the finisher roller and the applicator. As a result, the ink adheres again to the finisher roller, and even to the plate cylinder. For this reason, in order to clean the plate cylinder and the finisher roller, an operator must remove the applicator and clean the applicator in a separate process from the cleaning of the plate cylinder and the finisher roller. That is, an operator must perform an operation of removing the applicator and cleaning it. Therefore, an operator must work close to the printing press, which requires manpower and may cause an accident in which the operator is involved in the rotation of the plate cylinder and the finisher roller.

  The present invention aims to eliminate the above-mentioned drawbacks. That is, the present invention provides a printing machine having an applicator, which can automatically clean the applicator simultaneously with the cleaning of the finisher roller without any manual operation, and the furnisher. It is an object of the present invention to provide a cleaning method for a printing press that enables cleaning of an applicator simultaneously with cleaning of a roller.

The printing press of the present invention is
Plate cylinder,
A furnisher roller disposed around the plate cylinder and supplying ink to the plate cylinder;
An applicator disposed around the finisher roller for supplying ink to the finisher roller;
A cleaning nozzle for supplying a cleaning liquid for cleaning the plate cylinder, the finisher roller, and the applicator;
The cleaning nozzle can selectively supply cleaning liquid between the plate cylinder and the finisher roller and between the finisher roller and the applicator.

In the printing press of the present invention,
The cleaning nozzle has a first position for supplying cleaning liquid between the plate cylinder and the finisher roller, and a first position for supplying cleaning liquid between the finisher roller and the applicator. The orientation may be changeable so as to be between the two positions.

In the printing press of the present invention,
A moving mechanism that relatively changes the distance between the finisher roller and the plate cylinder may be provided.

The cleaning method of the present invention comprises:
A plate cylinder, a finisher roller disposed around the plate cylinder and supplying ink to the plate cylinder, and an applicator disposed around the finisher roller and supplying ink to the finisher roller In a cleaning method for cleaning the plate cylinder, the finisher roller, and the applicator of a printing press comprising:
A first cleaning step of supplying a cleaning liquid from a cleaning nozzle between the plate cylinder and the finisher roller;
A second cleaning step of supplying a cleaning liquid from the cleaning nozzle between the finisher roller and the applicator;

In the cleaning method of the present invention,
A step of relatively separating the distance between the finisher roller and the plate cylinder may be provided after the first cleaning step.

In the cleaning method of the present invention,
When the rotation direction of the plate cylinder and the finisher roller at the time of printing is a normal rotation, in the first cleaning step, the plate cylinder and the finisher roller are rotated to a normal rotation, and the second In the cleaning step, the finisher roller may be rotated in the reverse direction.

In the cleaning method of the present invention,
In the first cleaning step, the first rotation speed for rotating the plate cylinder and the finisher roller is higher than the second rotation speed for rotating the finisher roller in the second cleaning step. It may be late.

In the cleaning method of the present invention,
The first rotation speed may be not less than 13 rpm and not more than 39 rpm, and the second rotation speed may be not less than 65 rpm and not more than 91 rpm.

In the cleaning method of the present invention,
The cleaning nozzle may be capable of selectively supplying a cleaning liquid between the plate cylinder and the finisher roller and between the finisher roller and the applicator.

  According to the present invention, in a printing machine having an applicator, a plate cylinder, a finisher roller, and an applicator can be automatically cleaned without an operator approaching the printing machine.

FIG. 1 is a side view showing a printing press according to an embodiment of the present invention, and shows a printing process by the printing press. FIG. 2 is a side view of the printing machine showing a plate cylinder cleaning step as a first cleaning step. FIG. 3 is a side view of the printing machine showing the cleaning process of the finisher roller and the applicator, which is the second cleaning process. FIG. 4 is a flowchart showing an outline of the steps in the printing machine cleaning method. FIG. 5 is a flowchart showing a plate cylinder cleaning process which is a first cleaning process. FIG. 6 is a flowchart showing a cleaning process of the finisher roller and the applicator, which is a second cleaning process.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The drawings are only examples, and the features may be exaggerated for the sake of explanation, and may differ from the actual ones. In addition, the present invention can be implemented with appropriate modifications without departing from the technical idea. Note that, in the following drawings, the same portions are denoted by the same reference numerals, and some detailed description may be omitted.

  A printing machine (gravure printing machine) 1 includes an impression cylinder 11, a plate cylinder 12 disposed below the impression cylinder 11, a finisher roller 13 disposed around the plate cylinder 12, and a finisher. An applicator 14 disposed around the roller 13, a doctor 15 disposed around the plate cylinder 12, and a cleaning nozzle 20 that supplies the cleaning liquid 7 are provided. The printing machine 1 also includes an ink pan 16 disposed below the plate cylinder 12 and the finisher roller 13, an ink tank 17 disposed below the ink pan 16, and an ink pump 18 that sucks up the ink 5 from the ink tank 17. And further comprising.

  As shown in FIG. 1, the printing machine 1 is an apparatus that applies ink 5 to a web 3 that continuously proceeds. The web 3 is attached to the concave groove of the plate cylinder 12 by being pressed against the plate cylinder 12 by the impression cylinder 11 while being stretched from the left side to the right side in FIG. Ink 5 is applied.

  The impression cylinder 11, the plate cylinder 12 and the finisher roller 13 have a cylindrical shape, and can rotate forward and backward about their respective central axes. Here, the forward rotation means rotation at the time of printing on the web 3, and the reverse rotation means rotation opposite to the normal rotation. That is, in the example of FIG. 1, forward rotation means counterclockwise rotation for the impression cylinder 11, clockwise rotation for the plate cylinder 12, and counterclockwise rotation for the finisher roller 13. Further, the central axes of the impression cylinder 11, the plate cylinder 12 and the finisher roller 13 are parallel to each other.

  Next, each component of the printing press 1 will be described with reference to FIGS.

  The impression cylinder 11 is arranged so that the web 3 can be pressed against the plate cylinder 12. The impression cylinder 11 can be moved between an operation position (for example, below) where the web 3 is pressed against the plate cylinder 12 and a non-operation position (for example, above) where the web 3 is separated from the plate cylinder 12. That is, the impression cylinder 11 can be moved in a direction in which the impression cylinder 11 is in contact with or separated from the plate cylinder 12 (up and down direction in FIG. 1).

  The plate cylinder 12 has a cylindrical shape, and has a concave groove (not shown) for holding and coating the ink 5 on its side surface (cylindrical surface). The concave groove is formed, for example, in a spiral shape on the side surface (cylindrical surface) of the plate cylinder 12. Alternatively, the plate cylinder 12 may be cellular. The plate cylinder 12 is close to the doctor 15 on the side that rises during rotation (left side in FIG. 1).

  The finisher roller 13 supplies the ink 5 to the plate cylinder 12. The finisher roller 13 is arranged around the plate cylinder 12, particularly at a position close to the plate cylinder 12. The finisher roller 13 is provided with a moving mechanism 21 (see FIG. 1). The moving mechanism 21 moves the position close to the plate cylinder 12 shown in FIGS. 1 and 2 and the plate shown in FIG. It is possible to move the position away from the body 12. That is, the distance between the finisher roller 13 and the plate cylinder 12 can be relatively changed by the moving mechanism 21. Here, the finisher roller 13 may not be physically in contact with the plate cylinder 12 at a position close thereto. The finisher roller 13 can supply the ink 5 to the plate cylinder 12, and cleaning liquid 7 supplied from a cleaning nozzle 20 described later can be stored between the plate cylinder 12 and the finisher roller 13. Any position that is close enough to the extent is sufficient. The moving distance of the finisher roller 13 by the moving mechanism 21 is not particularly limited, but it is sufficient if it is separated from the plate cylinder 12 by about 10 mm. In addition, when the finisher roller 13 is moved, it is configured to move with an applicator 14 described later.

  The applicator 14 is a member for supplying ink to the finisher roller 13 and has a substantially V-shape combining two flat plates. The applicator 14 is arranged in the vicinity of the finisher roller 13, particularly on the side opposite to the side in contact with the plate cylinder 12. Further, the applicator 14 is disposed in the vicinity of the finisher roller 13 below the finisher roller 13. The applicator 14 may not be physically in contact with the finisher roller 13 at a position close thereto. If the position is close enough that ink 5 supplied from an ink pump 18 to be described later and cleaning liquid 7 supplied from a cleaning nozzle 20 can be stored between the finisher roller 13 and the applicator 14. Good.

  The doctor 15 is disposed around the plate cylinder 12, particularly in contact with the side of the plate cylinder 12. The doctor 15 scrapes off excess ink 5 adhering to the plate cylinder 12. The doctor 15 can take an operating position where the ink 5 is scraped and a non-actuating position where the ink 5 is not scraped as shown in FIGS. 2 and 3.

  The ink pan 16 is supplied by the ink 5 supplied from the ink pump 18 but not attached to the finisher roller 13, the ink 5 not attached to the plate cylinder 12 from the finisher roller 13, and the doctor 15 from the plate cylinder 12. This is a tray for collecting the scraped ink 5. Or it functions also as a saucer which collects cleaning fluid 7 in the washing process mentioned below. The ink pan 16 may have one or a plurality of holes at the bottom or the like, and the recovered ink 5 and cleaning liquid 7 may flow into the ink tank 17 and the cleaning liquid recovery tank 19 through the holes. .

  Ink tank 17 stores ink 5 to be applied to web 3. Further, the ink 5 collected by the ink pan 16 can be stored and reused.

  The ink pump 18 sucks up the ink 5 from the ink tank 17 and supplies the ink 5 between the finisher roller 13 and the applicator 14. The supply of the ink 5 by the ink pump 18 may be performed from an opening provided in the applicator 14 or from above the applicator 14.

  The cleaning nozzle 20 supplies a cleaning liquid 7 for cleaning the plate cylinder 12, the finisher roller 13 and the applicator 14. The cleaning nozzle 20 can selectively supply the cleaning liquid 7 between the plate cylinder 12 and the finisher roller 13 and between the finisher roller 13 and the applicator 14. The cleaning nozzle 20 includes a first position for supplying the cleaning liquid 7 between the plate cylinder 12 and the finisher roller 13 shown by a solid line in FIG. 1, and a finisher roller 13 and an application shown by a broken line in FIG. The second position where the cleaning liquid 7 is supplied to the second position 14 can be moved. Alternatively, the cleaning nozzle 20 has a bifurcated shape, and the cleaning liquid 7 is selectively supplied between the plate cylinder 12 and the finisher roller 13 and between the finisher roller 13 and the applicator 14. In other words, the direction in which the cleaning liquid 7 is supplied may be changed by operating a valve.

  Examples of the cleaning liquid 7 may include a mixture of IPA, methyl ethyl ketone, and toluene as an organic solvent. Such a cleaning liquid 7 can dissolve the ink 5 attached to the object and drop it from the object.

  A printing process on the web 3 in the printer 1 having the above-described components will be briefly described. First, the ink 5 is sucked up from the ink tank 17 by the ink pump 18, and the ink 5 is supplied between the finisher roller 13 and the applicator 14. Then, the impression cylinder 11, the plate cylinder 12 and the finisher roller 13 are rotated forward. As the finisher roller 13 rotates, the ink 5 between the finisher roller 13 and the applicator 14 adheres to the finisher roller 13. The ink 5 attached to the finisher roller 13 is supplied to the plate cylinder 12. The ink 5 adhering to the plate cylinder 12 is scraped off to an appropriate amount by the doctor 15 and then applied to the web 3.

  That is, in the printing process, the ink 5 adheres to the plate cylinder 12, the finisher roller 13, and the applicator 14. When the ink 5 adheres to the applicator 14, the ink 5 also adheres to the finisher roller 13 and the plate cylinder 12, as can be seen from the above-described printing process. Therefore, when the plate cylinder 12 and the finisher roller 13 are cleaned, the applicator 14 must also be cleaned.

  Next, with reference to FIGS. 2 to 6, a cleaning method for the printing press in the present embodiment will be described.

  First, when the above-described printing process is completed, the positive rotation of the impression cylinder 11, the plate cylinder 12 and the finisher roller 13 is stopped, and the ink pumping of the ink 5 by the ink pump 18 is also stopped. Then, the impression cylinder 11 moves from the operating position to the non-operating position, and the web 3 is separated from the plate cylinder 12.

  Thereafter, as shown in FIG. 4, the doctor 15 is moved to the non-operating position, and the ink 5 remaining in the printing press 1 is collected. The ink 5 remaining in the printing machine 1 falls to the ink pan 16 and is collected from the ink pan 16 to the ink tank 17. After the ink 5 is collected, the ink tank 17 is removed, and a cleaning liquid recovery tank 19 is installed below the ink pan 16, or the hole of the ink pan 16 leading to the ink tank 17 is closed, and another ink communication leading to the cleaning liquid recovery tank 19 is performed. A hole may be opened.

  Next, the first cleaning process, that is, the cleaning process of the plate cylinder 12 is started. Specific steps in the first cleaning step are shown in FIG. In the first cleaning step, first, the cleaning nozzle 20 moves to the first position, and the supply of the cleaning liquid 7 is started between the plate cylinder 12 and the finisher roller 13 as shown in FIG. The supplied cleaning liquid 7 is stored between the plate cylinder 12 and the finisher roller 13.

  Subsequently, the plate cylinder 12 and the finisher roller 13 are rotated forward. By the forward rotation of the plate cylinder 12 and the finisher roller 13, the portion to which the ink 5 is attached is immersed in the stored cleaning liquid 7 and the ink 5 is washed off. In this step, for cleaning the plate cylinder 12, the plate cylinder 12 and the finisher roller 13 are rotated forward until the plate cylinder 12 rotates at least once. Further, in the first cleaning step, the first rotation speed at which the plate cylinder 12 and the finisher roller 13 are rotated forward is preferably 13 rpm or more and 39 rpm or less, although it depends on the type of the cleaning liquid 7. If the first rotation speed is too slow, the time required for the first cleaning step increases. If the first rotational speed is too high, the ink 5 attached to the plate cylinder 12 is not sufficiently immersed in the stored cleaning liquid 7 and the ink 5 remains in the plate cylinder 12. The ink 5 and the cleaning liquid 7 washed off from the plate cylinder 12 and the finisher roller 13 fall from the region A in FIG. On the other hand, the ink 5 of the finisher roller 13 that could not be washed off remains in the region B of FIG.

  While the plate cylinder 12 and the finisher roller 13 are rotated, it is confirmed whether the plate cylinder 12 has been sufficiently cleaned by visual determination or determination based on an image captured by a camera or the like. If the determination is based on the image, the determination can be made automatically by a determination device or the like without depending on the operator or the like. While it is determined that the plate cylinder 12 is not sufficiently cleaned, the plate cylinder 12 and the finisher roller 13 continue to rotate forward. When it is determined that the plate cylinder 12 has been sufficiently cleaned, the forward rotation of the plate cylinder 12 and the finisher roller 13 is stopped, and the supply of the cleaning liquid 7 by the cleaning nozzle 20 is stopped. With the above steps, the first cleaning step is completed.

  As shown in FIG. 4, after the first cleaning step, the distance between the finisher roller 13 and the plate cylinder 12 is relatively separated by the moving mechanism 21 (see FIG. 1). More specifically, the finisher roller 13 is moved to the position shown in FIG. The finisher roller 13 moves with the applicator 14. Thus, since the finisher roller 13 is separated from the plate cylinder 12, the ink 5 attached to the finisher roller 13 does not adhere to the plate cylinder 12.

  Next, the second cleaning process, that is, the cleaning process of the finisher roller 13 and the applicator 14 is started. A specific process in the second cleaning process is shown in FIG. In the second cleaning step, first, the cleaning nozzle 20 is moved from the first position to the second position, and the cleaning liquid 7 is supplied between the finisher roller 13 and the applicator 14 as shown in FIG. To start. The supplied cleaning liquid 7 is stored between the finisher roller 13 and the applicator 14.

  Subsequently, the finisher roller 13 is reversely rotated. By reverse rotation of the finisher roller 13, the portion of the finisher roller 13 to which the ink 5 is attached is immersed in the stored cleaning liquid 7, and the ink 5 is washed off. In this step, the finisher roller 13 is rotated in reverse until the finisher roller 13 rotates at least once for cleaning the finisher roller 13. In the second cleaning step, it is preferable that the second rotation speed for reversely rotating the finisher roller 13 is faster than the first rotation speed in the first cleaning step. This is because the finisher roller 13 has been cleaned to some extent in the first cleaning step. Specifically, although depending on the type of the cleaning liquid 7, the second rotation speed is preferably 65 rpm or more and 91 rpm or less. If the second rotation speed is too slow, the time required for the second cleaning step increases. If the second rotation speed is too high, the ink 5 attached to the finisher roller 13 is not sufficiently immersed in the stored cleaning liquid 7 and the ink 5 remains on the finisher roller 13. Further, the cleaning liquid 7 may be scattered outside the ink pan 16 and may contaminate the peripheral portion of the printing machine 1. The ink 5 and the cleaning liquid 7 washed off from the finisher roller 13 and the applicator 14 fall from the region B in FIG. 3 to the ink pan 16. By passing the cleaning liquid 7 through the region B, the ink 5 remaining in the region B in the first cleaning step can be washed away.

  While the finisher roller 13 is rotating, as in the first cleaning step, it is confirmed whether the finisher roller 13 has been sufficiently cleaned by visual determination or determination based on an image captured by a camera or the like. . If the determination is based on the image, the determination can be made automatically by a determination device or the like without depending on the operator or the like. While it is determined that the cleaning of the finisher roller 13 is insufficient, the reverse rotation of the finisher roller 13 is continued. When it is determined that the finisher roller 13 has been sufficiently cleaned, the reverse rotation of the finisher roller 13 is stopped, and the supply of the cleaning liquid 7 by the cleaning nozzle 20 is stopped. Note that whether or not the cleaning has been performed may be performed not only on the finisher roller 13 but also on the applicator 14. With the above process, the second cleaning process is completed.

  After the printing process is completed, the printing press 1 is cleaned by the above processes including the first cleaning process and the second cleaning process. After the cleaning of the printing press 1 is completed, the cleaning liquid 7 used for cleaning is recovered from the ink pan 16 to the cleaning liquid recovery tank 19.

  As described above, according to the present embodiment, the printing machine 1 includes the plate cylinder 12, the finisher roller 13 that is disposed around the plate cylinder 12 and supplies the ink 5 to the plate cylinder 12, and the furniture. An applicator 14 that is disposed around the shear roller 13 and supplies the ink 5 to the finisher roller 13, and a cleaning nozzle 20 that supplies a cleaning liquid 7 that cleans the plate cylinder 12, the finisher roller 13, and the applicator 14. The cleaning nozzle 20 can selectively supply the cleaning liquid 7 between the plate cylinder 12 and the finisher roller 13 and between the finisher roller 13 and the applicator 14. According to such a printing machine 1, not only cleaning of the plate cylinder 12 and the finisher roller 13 but also cleaning of the finisher roller 13 and the applicator 14 can be performed. That is, in the printing press 1 having the applicator 14, the plate cylinder 12, the finisher roller 13, and the applicator 14 can be sufficiently cleaned automatically without an operator approaching the printing press 1. Thereby, the safety | security of the washing | cleaning operation | work of the printing press 1 can be improved.

  In the printing press 1 according to the present embodiment, the cleaning nozzle 20 includes a first position for supplying the cleaning liquid 7 between the plate cylinder 12 and the finisher roller 13, the finisher roller 13, and the application roller. The direction can be changed so as to be between the second position where the cleaning liquid 7 is supplied to the second position. According to such a printing machine 1, the supply location of the cleaning liquid 7 can be easily changed by changing the position of the cleaning nozzle 20.

  Further, the printing machine 1 according to the present embodiment is provided with a moving mechanism 21 that relatively changes the distance between the finisher roller 13 and the plate cylinder 12. According to such a printing machine 1, the finisher roller 13 and the plate cylinder 12 can be made independent in the cleaning process, and the ink 5 remaining on the finisher roller 13 is prevented from adhering to the plate cylinder 12. can do.

  Further, according to the present embodiment, the plate cylinder 12 is disposed around the plate cylinder 12, and the finisher roller 13 that supplies the ink 5 to the plate cylinder 12 is disposed around the finisher roller 13. In the cleaning method for cleaning the plate cylinder 12, the finisher roller 13 and the applicator 14 of the printing press 1 having the applicator 14 for supplying the ink 5 to the finisher roller 13, the plate cylinder 12 and the fan A first cleaning step of supplying the cleaning liquid 7 from the cleaning nozzle 20 between the shear roller 13 and a second of supplying the cleaning liquid 7 from the cleaning nozzle 20 between the finisher roller 13 and the applicator 14. And a cleaning step. According to such a cleaning method, the plate cylinder 12 can be cleaned in the first cleaning step, and the finisher roller 13 and the applicator 14 can be cleaned in the second cleaning step. Therefore, even if the printing press 1 has the applicator 14, the ink 5 remaining on the applicator 14 does not adhere to the washed plate cylinder 12.

  Furthermore, in the cleaning method according to the present embodiment, a step of relatively separating the distance between the finisher roller 13 and the plate cylinder 12 is provided after the first cleaning step. According to such a cleaning method, the finisher roller 13 and the plate cylinder 12 can be made independent, and adhesion of the ink 5 remaining on the finisher roller 13 to the plate cylinder 12 can be prevented.

  In the cleaning method of the present embodiment, when the rotation direction of the plate cylinder 12 and the finisher roller 13 during printing is set to the normal rotation, the plate cylinder 12 and the finisher roller 13 are moved in the first cleaning step. In the second cleaning step, the finisher roller 13 is rotated in the reverse direction. According to such a cleaning method, the portion of the plate cylinder 12 and the finisher roller 13 where the ink 5 is adhered can be immersed from above the stored cleaning liquid 7, and the washed-out ink 5 can be moved downward. It can flow.

  Furthermore, in the cleaning method according to the present embodiment, the first rotation speed for rotating the plate cylinder 12 and the finisher roller 13 in the first cleaning step is the same as that of the finisher roller 13 in the second cleaning step. Slower than the second rotation speed. Specifically, in the present embodiment, the first rotation speed is 13 rpm or more and 39 rpm or less, and the second rotation speed is 65 rpm or more and 91 rpm or less. According to such a cleaning method, the cleaning process can be performed more reliably and quickly.

  In the cleaning method according to the present embodiment, the cleaning nozzle 20 is selectively directed between the plate cylinder 12 and the finisher roller 13 and between the finisher roller 13 and the applicator 14. The cleaning liquid 7 can be supplied. According to such a cleaning method, not only cleaning of the plate cylinder 12 and the finisher roller 13 but also cleaning of the finisher roller 13 and the applicator 14 can be performed. That is, in the printing press 1 having the applicator 14, the plate cylinder 12, the finisher roller 13, and the applicator 14 can be sufficiently cleaned without an operator approaching the printing press 1.

  Various modifications can be made to the above-described embodiment.

  For example, in the first cleaning step, the plate cylinder 12 and the finisher roller 13 are rotated forward, but only the plate cylinder 12 may be rotated forward and the finisher roller 13 may be stopped. In this case, the cleaning liquid 7 is used only for cleaning the plate cylinder 12 because the finisher roller 13 is not cleaned in the first cleaning process. Therefore, the plate cylinder 12 can be cleaned more efficiently. Further, in the second cleaning step, the finisher roller 13 may rotate forward.

DESCRIPTION OF SYMBOLS 1 Printing machine 3 Web 5 Ink 7 Cleaning liquid 11 Impression cylinder 12 Plate cylinder 13 Finisher roller 14 Applicator 15 Doctor 16 Ink pan 17 Ink tank 18 Ink pump 19 Cleaning liquid collection tank 20 Cleaning nozzle

Claims (9)

In the printing press
Plate cylinder,
A furnisher roller disposed around the plate cylinder and supplying ink to the plate cylinder;
An applicator disposed around the finisher roller for supplying ink to the finisher roller;
A cleaning nozzle for supplying a cleaning liquid for cleaning the plate cylinder, the finisher roller, and the applicator;
The cleaning nozzle can selectively supply a cleaning liquid between the plate cylinder and the finisher roller and between the finisher roller and the applicator. Printer.   The cleaning nozzle has a first position for supplying cleaning liquid between the plate cylinder and the finisher roller, and a first position for supplying cleaning liquid between the finisher roller and the applicator. The printing press according to claim 1, wherein the orientation can be changed so as to be between the two positions.   The printing machine according to claim 1, further comprising a moving mechanism that relatively changes a distance between the finisher roller and the plate cylinder. A plate cylinder, a finisher roller disposed around the plate cylinder and supplying ink to the plate cylinder, and an applicator disposed around the finisher roller and supplying ink to the finisher roller In a cleaning method for cleaning the plate cylinder, the finisher roller, and the applicator of a printing press comprising:
A first cleaning step of supplying a cleaning liquid from a cleaning nozzle between the plate cylinder and the finisher roller;
A cleaning method comprising a second cleaning step of supplying a cleaning liquid from the cleaning nozzle between the finisher roller and the applicator.   The cleaning method according to claim 4, further comprising a step of relatively separating a distance between the finisher roller and the plate cylinder after the first cleaning step.   When the rotation direction of the plate cylinder and the finisher roller at the time of printing is a normal rotation, in the first cleaning step, the plate cylinder and the finisher roller are rotated to a normal rotation, and the second The cleaning method according to claim 4 or 5, wherein in the cleaning step, the finisher roller is rotated in the reverse direction.   In the first cleaning step, the first rotation speed for rotating the plate cylinder and the finisher roller is higher than the second rotation speed for rotating the finisher roller in the second cleaning step. The cleaning method according to claim 6, wherein the cleaning method is slow.   The cleaning method according to claim 7, wherein the first rotation speed is 13 rpm or more and 39 rpm or less, and the second rotation speed is 65 rpm or more and 91 rpm or less.   The cleaning nozzle can selectively supply a cleaning liquid between the plate cylinder and the finisher roller and between the finisher roller and the applicator. The cleaning method according to any one of claims 4 to 8.

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