JP2004174760A - Multicolor printing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide multicolor printing equipment in which lateral register can be easily and simply controlled. <P>SOLUTION: This multicolor printing equipment is equipped with a plurality of plate cylinders 11 arranged continuously so as to print a stripe-like line extending towards the running direction of a web W running among respective plate cylinders 11. The respective plate cylinder 11 has a spiral printing cell 11a. The respective plate cylinder 11 is driven by an individual driving motor 18, resulting in realizing an easy adjustment of rotational phases. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a multicolor printing apparatus that prints striped lines on a printing medium, and more particularly to a multicolor printing apparatus that can easily perform lateral register control.
[0002]
[Prior art]
Conventionally, a gravure printing apparatus having a plurality of plate cylinders arranged continuously is known. When printing a striped line on a printing material using such a gravure printing apparatus, it is necessary to perform lateral register control.
[0003]
Conventionally, when performing lateral register control, register control is performed by sliding each plate cylinder in the axial direction. At this time, the GS is generally provided with a movement adjusting mechanism for lateral registration with reference to the gear side (GS) of the plate cylinder, and the manside (MS) is used as a free end to follow the movement of the GS and register. It is being done.
[0004]
For example, in GS, as shown in FIG. 1A, the plate cylinder 11 is supported by a bearing housing 21, and the bearing housing 21 can be moved by a movement adjusting mechanism 22 of a servo motor ball screw type. Alternatively, as shown in FIG. 1B, the plate cylinder 11 is supported by a bearing housing 21, and the bearing housing 21 is movable by a cotter type movement adjusting mechanism 22. Further, as shown in FIG. 1C, the plate cylinder 11 is supported by a thrust bearing 23, and the thrust bearing 23 is movable by a movement adjusting mechanism 22.
[0005]
On the other hand, the MS of the plate cylinder 11 slides the bearing 26 and the housing 27 (FIG. 5A) or slides the shaft 25 and the bearing (cam follower) 26 so as to follow the movement of the GS. (FIG. 5B).
[0006]
[Problems to be solved by the invention]
However, the mechanism for adjusting the movement of the plate cylinder 11 for horizontal registration as described above has a complicated structure, and the units including the plate cylinder 11 as a whole increase in the number of mechanical elements and become complicated and large.
[0007]
In addition, the higher the required accuracy of the lateral register control, the higher the adjustment, the longer the adjustment time, and the higher the installation cost and maintenance cost.
[0008]
SUMMARY OF THE INVENTION The present invention has been made in view of such a point, and an object of the present invention is to provide a multicolor printing apparatus capable of easily and easily performing lateral register control.
[0009]
[Means for Solving the Problems]
The present invention provides a multicolor printing apparatus that includes a plurality of plate cylinders arranged in a row and that prints a stripe-shaped line extending in the traveling direction on the print substrate by running the print substrate between the plate cylinders. Each of the plate cylinders has a spiral printing cell and is driven by a drive unit whose rotational phase is adjustable.
[0010]
According to the present invention, there is provided a multicolor printing apparatus, wherein the driving unit includes a driving motor provided for each plate cylinder.
[0011]
According to the present invention, there is provided a multicolor printing apparatus characterized in that the drive unit includes a line shaft and a transmission connected to the line shaft and provided for each plate cylinder.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 are views showing an embodiment of a multicolor printing apparatus according to the present invention.
[0013]
As shown in FIGS. 1 to 3, the multi-color printing apparatus includes a plurality of printing units 10 arranged in series, and the printing medium (web) W is moved between the printing units so that the web W is moved. Striped lines 2, 3, and 4 extending in the running direction are printed.
[0014]
Each printing unit 10 prints striped lines 2, 3, and 4 on the web W, and each printing unit 10 has substantially the same configuration. For this reason, only one printing unit 10 will be described here.
[0015]
As shown in FIG. 1, the printing unit 10 includes a plate cylinder 11 rotatably supported by bearings 13 and 14 fixed to a frame 19, and an impression cylinder 12 for pressing a web W against the plate cylinder 11. Have. The impression cylinder 12 is supported by bearings 15 and 16 movably connected to a frame 19.
[0016]
The plate cylinder 11 is driven by a drive motor 18 via a coupling 17.
[0017]
As shown in FIG. 1, the plate cylinder 11 has on its surface spiral printing cells 11a for printing striped lines 2, 3, and 4. Since the cells 11a of the plate cylinder 11 have a spiral shape as described above, the lateral register control can be easily performed by shifting the phase between the plate cylinders 11 as described later.
[0018]
A drive motor 18 for each plate cylinder 11 is provided for each plate cylinder 11 so as to drive the corresponding plate cylinder 11 independently.
[0019]
In addition, each plate cylinder 11 is driven in synchronization with a line shaft without providing a drive motor 18 on each plate cylinder 11, and a harmonic drive transmission is provided between the line shaft and each plate cylinder 11 to provide each drive. The phase between the plate cylinders 11 may be adjusted.
[0020]
Next, the operation of the present embodiment having such a configuration will be described.
[0021]
First, as shown in FIG. 2, a stripe line 2 of the first color is printed on the web W by the plate cylinder 11 of the first unit. Next, the striped line 3 of the second color is printed by the plate cylinder 11 of the second unit.
[0022]
Next, the lateral register control will be described. That is, when the lateral register control is performed between the first color line 2 and the second color line 3 during printing, the following operation is performed.
[0023]
That is, the line 2 of the first color is printed by the plate cylinder 11 of the first unit, and the line 3 of the second color is printed by the plate cylinder 11 of the second unit. In such a printing process, when it is desired to shift the line 3 printed by the plate cylinder 11 of the second unit upward, the peripheral speed of the plate cylinder 11 of the second unit is changed to slightly advance the phase (FIG. 3). (A)). As a result, the position of the cell 11a of the plate cylinder 11 moves slightly upward from the position 11b where the lateral register control is not performed, and accordingly, the line 3 printed on the web W by the plate cylinder 11 does not perform the lateral register control. It moves upward from the position of the line 3a in the case. In this way, the line 3 printed by the plate cylinder 11 of the second unit can be moved upward.
[0024]
After performing the lateral register control in this way, the peripheral speed of the plate cylinder 11 is returned to the original speed. When the peripheral speed of the plate cylinder 11 is changed, it is slid between the web W and the plate cylinder 11 to absorb the change in the peripheral speed, or a compensator roller (not shown) installed between the plate cylinders 11 Absorbs this change in peripheral speed.
[0025]
On the other hand, when it is desired to shift the line 3 printed by the plate cylinder 11 of the second unit downward, the phase of the plate cylinder 11 of the second unit is slightly delayed (FIG. 3B). As a result, the position of the cell 11a of the plate cylinder 11 moves slightly downward from the position 11b where the lateral register control is not performed, and accordingly, the line 3 printed on the web W by the plate cylinder 11 does not perform the lateral register control. From the position of the line 3a.
[0026]
As described above, according to the present embodiment, the lateral register control of the striped line printed on the web can be easily and easily performed by slightly advancing or delaying the phase of the plate cylinder 11 of each unit. be able to.
[0027]
【The invention's effect】
As described above, according to the present invention, the lateral register control can be easily and easily performed only by adjusting the phase of the plate cylinder. For this reason, a plate cylinder movement adjusting mechanism for lateral registration becomes unnecessary, and the entire apparatus can be reduced in size and simplified, thereby simplifying maintenance work.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a multicolor printing apparatus according to the present invention.
FIG. 2 is a diagram illustrating a printing process by a multicolor printing apparatus.
FIG. 3 is a diagram illustrating a state in which a lateral register control of the multicolor printing apparatus is performed.
FIG. 4 is a schematic diagram showing a conventional multicolor printing apparatus.
FIG. 5 is a schematic view showing a conventional multicolor printing apparatus.
[Explanation of symbols]
2 Printed striped line 3 Printed striped line 10 Printing unit 11 Plate cylinder 11a Spiral cell 12 Impression cylinder 13, 14, 15, 16 Bearing 18 Drive motor 19 Frame W Web

Claims (3)

A multi-color printing apparatus that includes a plurality of plate cylinders arranged in a row and prints a striped line extending in the running direction on the print substrate by running the print substrate between the plate cylinders,
A multicolor printing apparatus, wherein each plate cylinder has a spiral printing cell and is driven by a drive unit whose rotational phase is adjustable. 2. The multi-color printing apparatus according to claim 1, wherein the driving unit includes a driving motor provided for each plate cylinder. 2. The multi-color printing apparatus according to claim 1, wherein the drive unit includes a line shaft and a transmission connected to the line shaft and provided for each plate cylinder.

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