JP2009132130A - Inking apparatus and inking device method in gravure printing press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent ink from being scattered sidewise from the end of a furnisher roll when the ink is supplied to a plate cylinder in a gravure printer having the furnisher roll. <P>SOLUTION: The inking apparatus of the gravure printer having the plate cylinder and the furnisher roll provided to touch the plate cylinder includes a zipping means for mounting the plate cylinder, a plate cylinder position measuring means for measuring the axial mounting position of the plate cylinder, a zipping means for mounting the furnisher roll, a furnisher roll position measuring means for measuring the axial mounting position of the furnisher roll, a furnisher roll moving distance calculating means for calculating how long the furnisher roll may move in the axial direction from the measured position of the plate cylinder and the value of the position of the furnisher roll, and a furnisher roll moving means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an ink application apparatus and an ink application method for a gravure printing machine, and more particularly to a rotary printing machine and a method including a furnisher roll for supplying ink to a gravure plate cylinder.

  Conventionally, the finisher roll width of a gravure printing machine is generally equal to or longer than the plate cylinder width.

  Although the center position of the plate cylinder and the finisher roll in the width direction needs to coincide, the conventional press cannot move the finisher roll. Accordingly, once the plate cylinder and the furnisher roll are shifted in the center position in the width direction, once the mounting position of the plate cylinder is determined, the shift cannot be corrected.

  When the finisher roll width is equal to the plate cylinder width, if the center position in the axial direction of the plate cylinder and the finisher roll does not match, either one of the end faces of the finisher roll is outside the plate cylinder end surface. The ink on the surface of the finisher roll tends to adhere to the end surface of the plate cylinder, which is transmitted to the rotating sidelay (tapered shaft for chucking the plate cylinder of the printing press) and causes ink scattering. There was a problem.

  As means for solving this problem, various techniques for preventing the ink from splashing laterally from the end of the finisher roll have been proposed. For example, in Patent Document 1, a groove extending in the circumferential direction is formed at the end of the finisher roll so that the ink does not move to the end of the finisher roll.

  However, in this method, a groove must be formed at the end of the finisher roll, and all the existing finisher rolls must be newly replaced.

Prior art documents are shown below.
JP 2003-305394 A

  The present invention solves such problems of the prior art. The object of the present invention is to provide a gravure printing machine having a plate cylinder and a furnisher roll in contact with the plate cylinder. Gravure printing that prevents ink from splashing laterally from the end of the finisher roll when supplying ink to the plate cylinder, prevents print defects from occurring and shortens the cleaning time of the printing press. The present invention is to provide an ink coating apparatus and an ink coating method.

In order to achieve the above object, in claim 1 of the present invention, in an ink coating apparatus having a plate cylinder and a furnisher roll provided in contact with the plate cylinder of a gravure printing machine,
Chucking means for attaching the plate cylinder;
Plate cylinder position measuring means for measuring the axial mounting position of the plate cylinder;
Chucking means for attaching the furnisher roll;
Furnisher roll position measuring means for measuring the axial position of the finisher roll;
From the values of the position of the plate cylinder and the position of the finisher roll measured by the plate cylinder position measuring means and the finisher roll position measuring means, the center positions in the axial direction of the plate cylinder and the finisher roll are matched. For this purpose, a finisher roll movement amount calculating means for calculating how much the finisher roll should be moved in the axial direction;
A gravure printing press ink application apparatus comprising: a furnisher roll moving means for moving the movement amount calculated by the furnisher roll movement amount calculating means.

In the invention of claim 2, in an ink coating apparatus having a plate cylinder and a furnisher roll provided in contact with the plate cylinder of a gravure printing machine,
Chucking means for attaching the plate cylinder;
Plate cylinder position measuring means for measuring the axial mounting position of the plate cylinder;
Chucking means for attaching the furnisher roll;
Furnisher roll position measuring means for measuring the axial position of the finisher roll;
Plate cylinder position display means for displaying values of the position of the plate cylinder and the finisher roll measured by the plate cylinder position measuring means and the finisher roll position measuring means;
And a moving means for moving the furnisher roll. An ink coating device for a gravure printing machine is provided.

In the invention of claim 3, in the ink application method of applying ink using a plate cylinder of a gravure printing machine and a furnisher roll provided so as to be in contact therewith,
Chucking stage to attach the plate cylinder,
A plate cylinder position measuring step for measuring an axial mounting position of the plate cylinder;
Chucking stage to install the furnisher roll,
The finisher roll position measuring step for measuring the installation position of the finisher roll in the axial direction;
From the values of the position of the plate cylinder and the position of the finisher roll measured in the plate cylinder position measurement step and the finisher roll position measurement step, the axial center positions of the plate cylinder and the finisher roll are matched. To do this, calculate how much the finisher roll should move in the axial direction,
A gravure printing machine ink application method comprising: a furnisher roll movement stage for moving the movement amount calculated in the furnisher roll movement amount calculation stage.

  Since this invention is the above structure, there exist the following effects. In other words, by aligning the center positions of the plate cylinder and the finisher roll in the width direction before printing starts, when ink is supplied from the finisher roll to the plate cylinder, It is possible to prevent ink from being scattered in the direction, to prevent the occurrence of printing defects on the printed matter, and to shorten the cleaning time of the printing press.

  Further, according to the configuration of the present invention, the operation of matching the center positions of the plate cylinder and the finisher roll in the width direction can be performed relatively easily and in a short time.

The best mode for carrying out the present invention will be described below in detail with reference to the drawings.
FIG. 1 illustrates an embodiment of the present invention, and is a diagram schematically illustrating an ink coating apparatus of a gravure printing machine that performs multicolor printing with a plurality of printing units.

  As shown in FIG. 1, in the printing unit in which the plate cylinder 1 is set on the left and right plate cylinder sidelays 4a and 4b, outside the plate cylinder sidelay 4a on the non-driving side (left side in FIG. 1). A plate cylinder motor 6a using a rack and pinion or the like is disposed outside the air cylinder 5a and the plate cylinder sidelay 4b on the drive side (right side in FIG. 1).

  When the plate cylinder motor 6a pushes or pulls the plate cylinder side-lay 4b, the air cylinder 5a outside the plate cylinder side-lay 4a on the counter-drive side moves accordingly, so that the plate cylinder 1 is chucked with a predetermined force. As it is, it is possible to adjust the position of the plate cylinder 1 in the axial direction (left-right direction in FIG. 1). The plate cylinder 1 itself is rotated by a plate cylinder rotating means (not shown).

  The doctor blade 3 for scraping the ink is disposed so as to contact the cylindrical surface of the plate cylinder 1 and scrapes off excess ink adhering to the cylindrical surface of the plate cylinder 1.

  The finisher roll 2 is chucked by finisher roll sidelays 4c and 4d on the left and right sides. In order to supply ink from the finisher roll 2 to the cylindrical surface of the plate cylinder 1, the finisher roll 2 and the surface of the plate cylinder 1 are arranged so as to contact each other.

  The ink supply to the surface of the finisher roll 2 may be performed by immersing the surface of the finisher roll 2 in the ink put in the ink pan, or the ink is poured into the contact portion between the finisher roll 2 and the plate cylinder 1. A predetermined amount may be accumulated.

  An air cylinder 5c is provided on the outer side of the counter-drive side (left side in FIG. 1) finisher roll side lay 4c, and a finisher roll alignment means is provided on the outer side of the drive side (right side in FIG. 1) finisher roll side lay 4d. 9 is arranged. The finisher roll positioning means 9 includes a finisher roll sidelay moving means such as a rack and pinion, and a handle for manually adjusting it.

  When the finisher roll sidelay 4d is pushed or pulled by the finisher roll positioning means 9, the air cylinder 5c outside the finisher roll sidelay 4c on the non-driving side moves accordingly. The position of the finisher roll 2 in the width direction (left and right direction in FIG. 1) can be adjusted while the finisher roll 2 is chucked with a predetermined force.

  Further, measuring means 7a and 7b for measuring the positions of the plate cylinder sidelays 4a and 4b, and measuring means 7c and 7d for measuring the positions of the finisher roll sidelays 4c and 4d, respectively, are installed. . The values measured by the measuring means 7a, 7b, 7c, 7d are displayed on the display means 10.

  The operator first aligns the plate cylinder 1 with the plate cylinder motor 6a so that the plate cylinder 1 is at a predetermined position in the width direction. The predetermined position in the width direction of the plate cylinder 1 is a position adjusted with respect to each other so as not to cause printing color misregistration with a plate cylinder of another printing unit that prints other colors.

  Next, the operator looks at the value displayed on the display means 10 and uses the handle attached to the finisher roll positioning means 9 so that the center position in the width direction of the finisher roll 2 is the position of the plate cylinder 1. Adjust to match the center position in the width direction.

  FIG. 2 illustrates another embodiment of the present invention, and is a diagram schematically illustrating an ink coating apparatus of a gravure printing machine that performs multicolor printing with a plurality of printing units.

  As shown in FIG. 2, in the printing unit in which the plate cylinder 1 is set on the plate cylinder positive sidelays 4a and 4b on both the left and right sides, on the outside of the plate cylinder sidelay 4a on the counter drive side (left side in FIG. 2). A plate cylinder motor 6a using a rack and pinion or the like is disposed outside the air cylinder 5a and the plate cylinder sidelay 4b on the drive side (right side in FIG. 2).

  When the plate cylinder motor 6a pushes or pulls the plate cylinder side-lay 4b, the air cylinder 5a outside the plate cylinder side-lay 4a on the non-driving side moves accordingly, so that the plate cylinder 1 is chucked with a predetermined force. The position of the plate cylinder 1 in the width direction (left and right direction in FIG. 2) can be adjusted as it is. The plate cylinder 1 itself is rotated by a plate cylinder rotating means (not shown).

  The doctor blade 3 for scraping ink is disposed so as to contact the cylindrical surface of the plate cylinder 1 and scrapes off excess ink adhering to the cylindrical surface of the plate cylinder 1.

  The finisher roll 2 is chucked by finisher roll sidelays 4c and 4d on the left and right sides. In order to supply ink from the finisher roll 2 to the cylindrical surface of the plate cylinder 1, the finisher roll 2 and the surface of the plate cylinder 1 are arranged so as to contact each other.

  The ink supply to the surface of the finisher roll 2 may be performed by immersing the surface of the finisher roll 2 in the ink put in the ink pan, or by pouring the ink into the contact area between the finisher roll 2 and the plate cylinder 1. A predetermined amount may be accumulated.

  An air cylinder 5c is provided on the outside of the counter-drive side (left side in FIG. 2) finisher roll sidelay 4c, and a rack and pinion is provided on the outside of the drive side (right side in FIG. 2) finisher roll sidelay 4d. An electric motor 6c for the finisher roll is arranged.

  When the motor 6c for the finisher roll pushes or pulls the sidelay 4d for the finisher roll, the air cylinder 5c outside the finisher roll sidelay 4c on the non-driving side moves accordingly. The position of the finisher roll 2 in the width direction (left-right direction in FIG. 2) can be adjusted while the roll 2 is chucked with a predetermined force.

  Further, measuring means 7a and 7b for measuring the positions of the plate cylinder sidelays 4a and 4b, and measuring means 7c and 7d for measuring the positions of the finisher roll sidelays 4c and 4d, respectively, are installed. .

  In order to bring the plate cylinder 1 to a predetermined position in the width direction, the plate cylinder motor 6a is operated to perform alignment. This is for aligning the plate cylinder 1 with the plate cylinder of another printing unit that prints other colors so that printing color misalignment does not occur. The operator may adjust the plate cylinder motor 6a of each printing unit one by one, or the plate cylinders of the printing units may be aligned with each other by a plate cylinder position adjusting means (not shown).

  The values measured by the measuring means 7a, 7b, 7c, 7d are sent to the control means 8. Since the plate cylinder 1 is already aligned at a predetermined position, the control means 8 causes the center position of the finisher roll 2 in the width direction to coincide with the center position of the plate cylinder 1 in the width direction. Then, the electric motor 6c for the finisher roll is operated.

  As the measuring means 7a to 7d in the present invention, for example, an encoder, an optical sensor or the like can be used. However, any means can be used as long as it can measure the position of the sidelay, and is not necessarily limited thereto. .

As described above, the present invention is an ink coating apparatus and an ink coating method for a gravure printing machine that adjusts the position of the finisher roll so that the plate cylinder and the finisher roll are at the same position manually or automatically. . As a result, when ink is supplied from the finisher roll to the plate cylinder, the ink can be prevented from splashing laterally from the end of the finisher roll. The cleaning time can be shortened.

It is explanatory drawing which shows one Embodiment of the ink application apparatus of the gravure printing machine of this invention, and an ink application method. It is explanatory drawing which shows other embodiment of the ink application apparatus of the gravure printing machine of this invention, and an ink application method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plate cylinder 2 Furnisher roll 3 Doctor blade 4a, 4b Plate cylinder side-lay 4c, 4d Furnisher roll side-lay 5a, 5c Air cylinder 6a Plate cylinder electric motor 6c Furnisher roll electric motors 7a-7d Measuring means ( Encoder, optical sensor, etc.)
8 Control device 9 Furnisher roll positioning means 10 Display means

Claims (3)

In an ink coating apparatus of a gravure printing machine having a plate cylinder and a furnisher roll provided in contact therewith,
Plate cylinder position measuring means for measuring the axial mounting position of the plate cylinder;
Chucking means for attaching the furnisher roll;
Furnisher roll position measuring means for measuring the axial position of the finisher roll;
From the values of the position of the plate cylinder and the position of the finisher roll measured by the plate cylinder position measuring means and the finisher roll position measuring means, the center positions in the axial direction of the plate cylinder and the finisher roll are matched. For this purpose, a finisher roll movement amount calculating means for calculating how much the finisher roll should be moved in the axial direction;
An ink coating apparatus for a gravure printing machine, comprising: a furnisher roll moving means for moving the movement amount calculated by the furnisher roll movement amount calculating means. In an ink coating apparatus of a gravure printing machine having a plate cylinder and a furnisher roll provided in contact therewith,
Chucking means for attaching the plate cylinder;
Plate cylinder position measuring means for measuring the axial mounting position of the plate cylinder;
Chucking means for attaching the furnisher roll;
Furnisher roll position measuring means for measuring the axial position of the finisher roll;
Plate cylinder position display means for displaying values of the position of the plate cylinder and the finisher roll measured by the plate cylinder position measuring means and the finisher roll position measuring means;
An ink coating apparatus for a gravure printing machine, comprising: moving means for moving the finisher roll. In an ink application method for applying ink using a plate cylinder of a gravure printing machine and a furnisher roll provided in contact with the plate cylinder,
Chucking stage to attach the plate cylinder,
A plate cylinder position measuring step for measuring an axial mounting position of the plate cylinder;
Chucking stage to install the furnisher roll,
The finisher roll position measuring step for measuring the installation position of the finisher roll in the axial direction;
From the values of the position of the plate cylinder and the position of the finisher roll measured in the plate cylinder position measurement step and the finisher roll position measurement step, the axial center positions of the plate cylinder and the finisher roll are matched. To do this, calculate how much the finisher roll should be moved in the axial direction,
An ink coating method for a gravure printing machine, comprising: a furnisher roll movement stage for moving the movement amount calculated in the furnisher roll movement amount calculation stage.

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