JPH1158692A - Auxiliary device for confirming color-matching in printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily confirm the degree of color-matching under the condition near a printing state by oppositely disposing a roller wound with a film for confirming the degree of color-matching on a plate cylinder, rotatably mounting the roller on a movable part of a hydraulic cylinder, and bringing it into contact with a surface of a plate cylinder by a predetermined pressing force. SOLUTION: The color-matching confirmation auxiliary device 22 comprises a roller 26 on which a film for confirming the degree of color-matching is wound, and a hydraulic cylinder 30 such as an air cylinder or the like rotatably mounted at an end of a rod 28 as a movable part of the roller 26. The device 22 also comprises a slide rail 32 isolated at a predetermined interval from a plate cylinder 12 and extended parallel to a lengthwise axial direction. The device 22 is slidably mounted on the rail 32. With such a constitution, the roller 26 can be moved along a lengthwise axial direction of the cylinder 12. And, confirmation of the degree of the color-matching at each part of the cylinder 12 can be easily executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assisting device for confirming the toning of gravure ink in a gravure rotary printing press.

[0002]

2. Description of the Related Art In general, as a gravure printing press, a sheet-fed printing press and a roll-up rotary printing press are known, and basically comprise a paper feeding section, a printing section, and a paper discharging section. Have been.

In the paper feeding section, a portion for stably supplying a printing medium is greatly different between a sheet type and a winding type. In the case of the sheet-fed type, in order to sequentially send out the printed paper one by one, it is important to stack the papers and correct the habit of the papers, and the papers must always be fed in parallel. In the case of the roll-up type, the paper to be printed is supplied continuously, so a reel stand for mounting the roll-up paper, a paper splicing device for splicing a new roll-up paper, and a tension for performing stable paper feeding. The paper feed unit is configured by an infeed device that performs the above control.

The printing section includes a plate cylinder, an impression cylinder, an ink supply device, a doctor device, and a drying device. Further, there is an automatic register device for registering printing, but the method differs between the sheet-fed type and the winding type.

[0005] Next, the above-mentioned impression cylinder is necessary for performing printing by applying sufficient pressure in gravure printing, and is formed by winding rubber around a hollow or solid iron cylinder. ing.

The above-mentioned ink supply device is a device for supplying printing ink to a printing plate, and includes an ink pan, an ink tank, an ink pump and the like. As the ink supply system, a dove-attaching system, a forming roller system, a cascade system, and a combination thereof are used.

The above-mentioned doctor device is a blade made of a thin steel plate for scraping off excess ink that has reached the plate surface of the plate cylinder.

The above-mentioned drying apparatus is used for drying printed ink. For drying solvent-based ink such as gravure printing, temperature and air volume are effective.
As a drying method, a heating drum type using steam and heat transfer, an infrared lamp type, and a hot air drying type using a heat exchanger are used.

The above-mentioned register device is a device for registering a printing register. In the case of a sheet type, the register is determined by a register and a needle so as to print one color at a time, and in the case of a rotary type, a phototube is used. An automatic register consisting of electro-eye is used.

[0010] Further, in the paper discharging section, the printed material, which has been printed in the printing section, is discharged as it is in the case of a single sheet type, and is sent to post-processing. In the case of a rotary type, it is wound as it is or processed in-line. As the processing machine, a folding machine for publications, a sheeter for cutting into sheets, a punching machine for paper containers, and the like are used.

However, conventionally, in the field of gravure printing using a gravure rotary printing machine, the following confirmation method has been adopted when confirming the toning condition of gravure ink. That is, (a) a method in which a small amount of the prepared ink is scrubbed and applied to paper or the like to check, or (b) a film is wound around a roller and an operator presses the roller against a plate surface of a plate cylinder to check a transfer result. Is the way.

[0012]

However, the above-described method for confirming the toning condition of the ink has many problems to be solved as follows.

That is, although the method (a) has the advantage that it is simple, it has a disadvantage that it is not possible to confirm strict toning of the ink because it is far from the actual printing conditions.

[0014] In the confirmation method of the above (b),
Although the printing conditions are close to the actual printing conditions, there is a problem that the actual printing pressure cannot be reproduced because the pressing of the roller against the plate is performed manually by the operator.

Accordingly, the present invention provides a roller around which a film for confirming the toning condition is provided, the roller is mounted on a movable portion of a hydraulic cylinder, and the hydraulic cylinder is attached to the longitudinal axis of the plate cylinder. Movably provided on the other hand, and by rotating the plate cylinder by an independent drive motor, the film wound around the roller by the operation of the fluid pressure cylinder is appropriately pressed and brought into contact with the plate surface of the plate cylinder, It is possible to easily confirm the toning condition in each part of the plate cylinder substantially in conformity with the printing conditions.

Accordingly, it is an object of the present invention to provide a gravure rotary printing press having a motor for driving a plate cylinder for each printing unit, and to confirm the condition of toning at each part of the plate cylinder under substantially the same conditions as actual printing conditions. Can be easily performed,
An object of the present invention is to provide a color matching confirmation auxiliary device for a printing press, which can achieve the above-mentioned confirmation work more efficiently.

[0017]

In order to achieve the above object, the present invention provides a color matching confirmation assisting device for a printing press, comprising: a gravure rotary printing press having a plate cylinder driving motor for each printing unit; A roller around which a film for checking the toning condition is wound is opposed to the roller, and the roller is attached to the movable part of the fluid pressure cylinder so that the roller comes into contact with the plate surface of the plate cylinder with a required pressing force. It is characterized by comprising.

In this case, the fluid pressure cylinder to which the rollers are mounted is configured to be movable in the longitudinal axis direction of the plate cylinder, thereby easily and efficiently confirming the degree of toning at each part of the plate cylinder. can do.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a color matching confirmation assisting device for a printing press according to the present invention.

FIGS. 1 to 3 show an embodiment of a toning confirmation assisting device for a printing press according to the present invention.
FIG. 3 shows a schematic configuration of a printing unit 10 of a gravure rotary printing press provided with a toning confirmation assisting device, and FIG. 2 shows a film for confirming the condition of toning which is a main part of the toning confirmation assisting device. 1 shows a configuration of a roller for winding the roller.

In FIG. 1, the printing unit 10 includes a plate cylinder 12 and an impression cylinder 14 which are vertically opposed to each other via a printing paper 16. An ink supply device 18 is provided for the plate cylinder 12, and a doctor device 20 is arranged adjacent to one side of the plate cylinder 12.

A color matching confirmation assisting device 22 is provided so as to face a part of the plate surface of the plate cylinder 12.

In this embodiment, however, the toning confirmation assisting device 22 includes a roller 26 (see FIG. 2) around which a film 24 for confirming the toning condition is provided, and the roller 26 serving as a movable portion. A fluid pressure cylinder 30 such as an air cylinder is rotatably attached to the tip of the rod 28. 2, a holder 26a for detachably fixing and holding one end of the film 24 is provided on a part of the outer periphery of the roller 26.

The toning confirmation assisting device 2 thus configured
2 is provided with a slide rail 32 which is separated from the plate cylinder 12 by a predetermined distance and extends parallel to the longitudinal axis direction (see FIG. 3), and slides the toning confirmation assisting device 22 on the slide rail 32. Attach freely. With such a configuration, the roller 26 can be moved along the longitudinal axis direction of the plate cylinder 12, and it is possible to easily confirm the toning condition of each part of the plate cylinder 12.

In the present embodiment, as shown in FIG. 3, the plate cylinder 12 is individually driven to rotate for each printing unit by a drive motor 34 provided independently for each printing unit. Constitute.

Therefore, according to the toning confirmation assisting device 22 having the above-described structure, the film 24 wound around the roller 26 is made to substantially match the printing condition of the plate cylinder 12 by the operation of the fluid pressure cylinder 30. The plate cylinder 12 can be rotated by a drive motor 34 dedicated to each printing unit, and the film 24 can be checked for proper toning.

By moving the toning confirmation assisting device 22 along the slide rail 32, the plate cylinder 1 is moved.
It is also easy to confirm the toning condition of each part of No. 2. Therefore, according to the apparatus of the present invention, there is an advantage that it is possible to easily cope with a change in plate length.

Although the preferred embodiments of the present invention have been described in various ways, the present invention is not limited to the above-described embodiments, and many design changes can be made without departing from the spirit of the present invention.

[0029]

As described above, the color matching confirmation assisting device for a printing press according to the present invention is a gravure rotary printing press having a plate cylinder driving motor for each printing unit. A roller around which a film is wound to confirm that the roller is disposed is opposed to the roller, and the roller is rotatably mounted on the movable portion of the fluid pressure cylinder so that the roller comes into contact with the plate surface of the plate cylinder with a required pressing force. This makes it possible to easily check the condition of toning under conditions very close to the printing state, and to adjust the length of the plate surface in the direction of the plate surface length by moving the fluid pressure cylinder along the longitudinal axis direction of the plate cylinder. The confirmation operation can be efficiently performed by being able to cope with color changes and individually driving the plate cylinders for each unit.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an embodiment of a toning confirmation auxiliary device for a printing press according to the present invention.

FIG. 2 is a cross-sectional view of a main part showing a configuration of a roller for checking toning shown in FIG. 1;

FIG. 3 is a schematic front view of the toning confirmation assisting device of the printing press shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Printing part 12 Plate cylinder 14 Impression cylinder 16 Printing paper 18 Ink supply device 20 Doctor device 22 Toning confirmation auxiliary device 24 Film 26 Roller 26a Holder 28 Rod 30 Fluid pressure cylinder 32 Slide rail 34 Plate cylinder drive motor

Claims (2)

[Claims] In a gravure rotary printing press having a plate cylinder driving motor for each printing unit, a roller around which a film for confirming the toning condition is arranged with respect to the plate cylinder is disposed so as to face the roller. Attach to the movable part of the pressure cylinder,
A color matching confirmation device for a printing press, wherein the device is configured to abut against a plate surface of the plate cylinder with a required pressing force. 2. The toning confirmation device for a printing press according to claim 1, wherein the fluid pressure cylinder to which the roller is attached is configured to be movable in the longitudinal axis direction of the plate cylinder.