JP3940918B2 - Printing pressure adjustment device for satellite type printing press - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a satellite-type printing machine for sheet-fed printing, and more particularly, to a printing pressure adjusting device thereof.
[0002]
BACKGROUND OF THE INVENTION
A satellite-type printing machine in which a large number (for example, four colors) of printing units are arranged in a satellite shape with a large diameter common impression cylinder as the center is known from, for example, Japanese Patent Application Laid-Open No. 8-244195. However, since the thickness of the printed sheet varies widely, the contact pressure between the blanket cylinder and the common impression cylinder of the printing unit, that is, the printing pressure must be adjusted accordingly.
[0003]
[Prior art]
In Japanese Patent Laid-Open No. 3-1947, a blanket cylinder of a printing unit supported by a double eccentric bearing in a conventional serial type sheet-fed printing press is adjusted to be integrated with each pressure cylinder. Techniques to do this are disclosed.
In Japanese Patent Publication No. 8-29586, in the technique of adjusting the nail gripping with respect to different paper thicknesses, a plurality of nail seats arranged equally on the circumference of the trunk are integrated from the center of the trunk. Techniques for adjustment are disclosed.
[0004]
[Problems to be solved by the invention]
The present invention provides a printing pressure adjusting device for a completely new satellite type printing machine, and its purpose is to adjust the printing pressure of a large number of blanket cylinders in an integrated and simple manner. In addition to the adjustment, individual fine adjustment according to the circumstances of each printing unit is allowed.
[0005]
[Means for Solving the Problems]
For this purpose, the printing pressure adjusting device of the satellite type printing press according to the present invention penetrates the center of the common impression cylinder (1) and is supported independently from the common impression cylinder (1). (10), a roller wheel (13) fixed to the end of the base shaft (10), an eccentric bearing means (9) having one end connected to the wheel (13) and the other end blanket cylinder (5). Each of the linking means (14) and the driving means (16) for rotating the rotary (13), and the fine adjusting means (15) is provided in the middle of each linking means (14). ) Is provided.
[0006]
[Action]
When the thickness of the sheet applied to the satellite-type printing machine changes and it is necessary to adjust the printing pressure, the driving means (16) is activated to rotate the roller (13) by the required amount integrally with the base shaft (10). Let The rotational force is supplied to the eccentric bearing means (9) via the linkage means (14).
Is rotated to adjust the printing pressure.
[0007]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a conceptual side view showing an embodiment of a printing pressure adjusting device for a satellite type printing press according to the present invention, FIG. 2 is a cross-sectional view of the main part, and FIG. It is sectional drawing which shows the bearing part of a blanket cylinder.
[0008]
In the center of FIG. 1, a common impression cylinder (1) of a satellite type printing machine is shown. As already known from Japanese Patent Laid-Open No. 8-244195 and the like, a large diameter common impression cylinder is shown. (1) is rotatably supported between a pair of side frames (2) on both sides of the printing press and is driven by a motor (not shown). Although not shown, a gripping claw that holds the end of the sheet is provided on the circumference of the common impression cylinder (1), and the sheet is received from the upstream side (right side in FIG. 1) After performing the required printing, the sheet is delivered to the downstream paper discharge device.
[0009]
Around the common impression cylinder (1), four sets of printing units (3) are arranged in a satellite shape. These printing units (3) have a plate cylinder (4) to which a printing plate is attached and a blanket cylinder (5) to which a pattern is transferred in order to perform color offset printing. In addition, the plate cylinder (4) Is provided with an inking device and a dampening solution device.
Note that the diameter of the common impression cylinder (1) is an integral multiple (for example, 4 times) of the diameter of the plate cylinder (4) of the printing unit (3) arranged in a satellite shape. The reason for this is to adjust the rotation of the common impression cylinder (1) driven by a motor (not shown) so that these printing units (3) sequentially perform overprinting of each color.
[0010]
The barrel shafts (6) at both ends of the blanket cylinder (5) to be subjected to printing pressure adjustment are double eccentric bearings as well known from the above-mentioned JP-A-3-1947. Is supported between the side frames (2).
In the double eccentric bearing shown in FIG. 3 as an example, the inner eccentric bearing (7) is used to insert / remove the blanket cylinder (5), and this inner eccentricity is provided by the cylinder (8). It is well known that the blanket cylinder (5) is attached to and detached from the common impression cylinder (1) and the plate cylinder (4) which are fixed in position by rapidly rotating the bearing (7).
[0011]
The printing pressure adjustment is based on the assumption of such cylinder insertion / extraction, but changes the distance from the center of the common impression cylinder (1) to the axis of the blanket cylinder (5) in response to the change in paper thickness. In order to adjust the contact pressure of both the cylinders (1) and (5), an eccentric bearing outside the double eccentric bearing (hereinafter referred to as eccentric bearing means (9)) is rotated a required amount. It is necessary to move.
[0012]
As shown in FIG. 2, a base shaft (10) is provided through the center of the common impression cylinder (1), and both ends thereof can be rotated by brackets (11) fixed to the side frame (2). It is supported by. As shown in the figure, this base shaft (10) has a gap between it and the body shaft (12) of the common impression cylinder (1), and is supported completely independently.
And the rolling wheel (13) which is a circular rotary body is solidified by the both ends of the base shaft (10).
[0013]
In order to transmit force from the center side of the common impression cylinder (1) to the eccentric bearing means (9) of the blanket cylinder (5) arranged in a satellite shape, linkage means (14) by a link is provided, One end of the linkage means (14) is connected to the wheel (13), and the other end is connected to the eccentric bearing means (9).
In order to meet the need for fine adjustment due to individual circumstances (manufacturing errors, aging) of the many blanket cylinders (5), a turnbuckle is inserted in the middle of the link means (14). The adjusting means (15) is used.
A driving means (16) by a cylinder is connected to the wheel (13) so as to rotate a large number of eccentric bearing means (9) collectively from the common impression cylinder (1) side.
[0014]
Next, the operation of the above configuration will be described. When the thickness of the sheet to be applied to the satellite type printing machine changes and the printing pressure needs to be adjusted, the driving means (16) is activated by a command signal (including paper thickness information) from the control console.
A roller (13), which is fixed to a base shaft (10) that penetrates the center of the common impression cylinder (1) and is completely independent from the common impression cylinder (1), is pressed by the drive means (16). It is rotated by power.
The rotation of the roller wheel (13) causes the eccentric bearing means (9) of a number of blanket cylinders (5) to rotate via the respective linking means (14). ) To the center of each blanket cylinder (5) is collectively adjusted to adjust the printing pressure.
[0015]
【The invention's effect】
According to the printing pressure adjusting device for a satellite type printing press according to the present invention, the printing pressure of a large number of blanket cylinders can be collectively adjusted from the center side of the common impression cylinder, so the work burden associated with the printing pressure adjustment is drastically increased. There is a significant effect that can be reduced.
[Brief description of the drawings]
FIG. 1 is a conceptual side view showing an embodiment of a printing pressure adjusting device for a satellite type printing machine according to the present invention.
FIG. 2 is a cross-sectional view of the main part of the same.
FIG. 3 is a cross-sectional view showing a bearing portion of a blanket cylinder that is an object of adjustment of printing pressure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Common impression cylinder 3 Printing unit 5 Blanket cylinder 6 Body shaft 9 Eccentric bearing means 10 Base shaft 11 Bracket 13 Rolling wheel 14 Linking means 15 Fine adjustment means 16 Driving means

Claims (1)

A blanket cylinder (5) of a large number of printing units (3) is arranged in a satellite shape around a large diameter common impression cylinder (1), and a cylinder shaft (6) of the blanket cylinder (5) is an eccentric bearing. In the satellite type printing machine supported by the means (9) and capable of adjusting the distance from the center of the common impression cylinder (1) to the axis of the blanket cylinder (5), the center of the common impression cylinder (1) And a base shaft (10) supported independently from the common impression cylinder (1), a roller (13) fixed to an end of the base shaft (10), and one end of the base shaft (10) The roller pressure (13) includes linkage means (14) whose other ends are connected to the eccentric bearing means (9), and drive means (16) for rotating the wheel (13). apparatus.

Images