JPH0440924Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a pressing device for a finesse roller in a rotogravure rotary printing press, and more particularly to a device for holding and pressing a finesse roller against a plate cylinder.

Conventional technology In general, when supplying ink to the plate cylinder in gravure printing, the finesse roller method has the advantage of being able to sufficiently distribute the ink to the depths of small depressions on the plate, resulting in good printing effects. is widely adopted. As shown in FIGS. 5A and 5B, the conventional method of pressing the fannisher roller is to hold the fannisher roller 2 on the ink pan 1 and adjust the height of the ink pan 1 in response to changes in the diameter of the plate cylinder 3. As shown in FIG. 6, there is a method in which a rotatable arm 5 is provided to hold the fine print roller 2 on the printing press frame 4, and changes in the diameter of the plate cylinder are handled by rotating the arm 5. be.

Problems to be Solved by the Invention However, with the structure shown in FIGS. 5A and 5B, it is difficult to accurately determine the contact pressure between the plate cylinder 3 and the fancier roller 2 by adjusting the level of the ink pan. Since the ink pan is fixed to the ink pan, there is a problem that cleaning performance is poor. Furthermore, in the structure shown in FIG. 6, it is necessary to provide a notch in the side surface of the ink pan 1 so that the shaft of the fine print roller 2 can move when the arm 5 rotates, and there is a problem in that ink is scattered from this notch. There is a point.

The present invention aims to solve the above-mentioned problems of the conventional technology, and provides a finesse roller pressing device that can easily adjust the pressing pressure on the plate cylinder, prevent ink scattering, and is easy to clean. The purpose is to

Means for Solving the Problems The present invention, which has been devised to achieve the above object, is a fannisher roller pressing device for pressing a finessier roller against a plate cylinder in a gravure printing machine. a circular hole formed in the tip surface of the overhang located above both side surfaces and protruding from both frames; A disk inserted so that it is almost on the same plane,
Summary of a finesse roller pressing device comprising a disk drive mechanism provided outside the disk and rotating the disk, and a finesse roller held at an eccentric position of the disk. shall be.

Function: The fine print roller is held in an eccentric position by a disk provided on both sides of the ink pan or the tip of the overhang, so the rotation of the disk changes its position relative to the plate cylinder, adjusting the position of the ink pan. The plate can be pressed against the plate cylinder with the desired contact pressure without any pressure. Also, the areas where the fancier rollers are located on both sides of the ink pan are
Since it is closed by the disc holding the shaft of the fancier roller or the tip end surface of the overhanging part, there is no need for a notch and there is no problem of ink scattering as in the conventional case. Further, since the disk is disposed so as to be substantially flush with the side surface of the ink pan or the front end surface of the projecting portion, cleaning is easy.

Embodiments Hereinafter, preferred embodiments of the present invention shown in the drawings will be described.

FIG. 1 is a side sectional view showing the main parts of a gravure printing unit equipped with a finessier roller pressing device of the present invention, and FIG. 2 is a front sectional view thereof. In the figure, 11 is an ink pan, 12 is a finer roller, 13 is a plate cylinder, and 14 is a printing press frame. The ink pan 11 has side plates 16 forming flat sides on both sides and a body plate 17 between the two side plates.A circular hole 16A is formed in the side plate 16, and a disc 18 is rotatably mounted therein. There is. Third
As shown in the enlarged figure, the inner periphery of the hole 16A and the disc 1
A sealing material 19 and a bearing 20 are installed between the outer periphery of the bearing 8 and the outer periphery of the bearing 8 . The inner surface of the disk 18 is arranged so as to be substantially flush with the inner circumference of the side plate 16, making it easy to clean the inner surface of the ink pan.

At a position eccentric from the center of rotation of the disc 18, the shaft 12A of the fannisher roller 12 is attached to the sheet material 2.
2. It is rotatably held via a bearing 23. A pulley 12B is provided at the end of one shaft 12A. An intermediate shaft 25 is located at the center of rotation of the disc 18.
is rotatably held, and pulleys 25A, 25B
hold. The pulley 25A is connected by a belt to a pulley 12B connected to the fancier roller 12, and the pulley 25B is drivingly connected to a rotational drive system (for example, a motor) not shown. Thus, the finesse roller 12 can be rotationally driven by the rotary drive system no matter which position the disk 18 rotates. Note that the means for transmitting the rotation of the rotary drive system to the fancier roller 12 is not limited to pulleys and belts, but any other means such as gears may be used.

As shown in FIG. 4, on the outside of the disc 18 are an air cylinder 26, a lever 27, a rod 28, and a pin 2.
A disk drive mechanism is provided that rotates a circular body consisting of 9 or the like. Note that the mechanism for rotating the disk 18 is not limited to the one shown in the drawings, and can be modified as appropriate.
For example, a concentric gear may be provided on the disc and a rack that meshes with the gear may be driven by an air cylinder, or the gear may be driven by meshing with a gear driven by a motor.

As described above, since the fancier roller 12 is held at an eccentric position on the rotatable disc 18, the position of the fancier roller 12 can be changed by rotating the disc 18. Therefore, there is no need to adjust the height of the ink pan 11 regardless of the size of the diameter of the plate cylinder 13, and the finesse roller 12 can be pressed against the plate cylinder 13 with a contact pressure corresponding to the force applied to the circular body 18. can.

In the embodiment described above, the disk 13 holding the finesse roller 12 is provided on the end surface 16 of the ink pan 11, but the mounting position of the disk 18 is not limited to this position and can be changed. FIG. 7 shows an embodiment in which the disk is attached to a location other than the side of the ink pan. In this embodiment, projecting portions 31 having flat tip surfaces 13A are provided on both sides of the printing press frame 14, and the disk 18 is attached to the tip surfaces 31A. The ink pan 11 is disposed such that the upper end of its side surface 16 is in sealing contact with the lower surface of the overhang. In other words, the tip surface 31A of the projecting portion 31 forms an extension of the side surface of the ink pan. In this embodiment as well, the rotation of the disk 18 allows the fannisher roller 12 to be pressed against the plate cylinder 13, and the tip end surface 31A of the projecting portion prevents ink from scattering outside the ink pan.

Effects of the invention As described above, according to the invention, the fine print roller can be easily pressed against the plate cylinder with a predetermined contact pressure without adjusting the level of the ink pan.
It is also effective in preventing ink from scattering outside the ink pan. Furthermore, since flat discs are used on the sides of the ink pan or the tip of the overhang, these surfaces have the advantage of being easy to clean. This can be very effective in shortening the preparation time.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a gravure printing unit constituting an embodiment of the present invention, Fig. 2 is a front sectional view thereof, Fig. 3 is an enlarged sectional view of the disc 18 and its vicinity, and Fig. 4 is a sectional view of the disc. 5A and 5B are schematic diagrams showing a conventional finesse roller pressing mechanism, and FIG. 6 shows another example of the conventional finesse roller pressing mechanism. FIG. 7 is a perspective view showing another embodiment of the present invention. 1, 11... Ink pan, 2, 12... Fancier roller, 3, 13... Plate cylinder, 4, 14...
...Printing press frame, 16...Ink pan side, 1
6A...hole, 18...disc, 19...sealing material,
31... Overhanging portion, 31A... Tip surface.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A fannisher roller pressing device for pressing a fannisher roller against a plate cylinder in a gravure printing machine, which includes:
or a circular hole formed in the tip surface of an overhang located above both sides of the ink pan and protruding from both frames; It has a disk inserted so as to be substantially flush with the surface, and a disk drive mechanism provided outside the disk to rotate the disk,
A finesse roller pressing device, characterized in that a finesse roller is held at an eccentric position of the disc. (2) The fannisher roller pressing device according to claim 1, wherein the fannisher roller is connected to a rotational drive system.