JP2550756Y2 - Register adjustment display device for sheet-fed printing press - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to register adjustment of a sheet-fed printing press, and more particularly, to the amount of register adjustment in the axial and vertical directions of a plate cylinder on which a plate is wound, and the amount of twist adjustment of a plate. The present invention relates to a register adjustment display device that integrally displays the information.

[0002]

BACKGROUND OF THE INVENTION In a multicolor printing sheet-fed printing press, a printing plate is wound around a number of plate cylinders corresponding to the number of colors, and printing is performed in the order of each color. At this time, good printing quality cannot be obtained unless each color is sequentially printed at the correct position on one sheet of paper.

In order to obtain a correct register for each color, a cross-shaped mark commonly called a register mark is printed on the margin of the paper. Then, the amount of misregistration of the register marks for each color is measured, and register adjustment of the plate cylinder or the printing plate is performed.

Among them, the registration adjustment operation in the axial direction and the vertical direction of the plate cylinder is disclosed in JP-A-58-69056 and JP-A-58-78766. In each of the techniques, the following operations are performed. The position of the plate cylinder in the axial direction and the vertical direction is detected by a potentiometer. Each position is digitally displayed in two directions. The plate cylinder driven in each direction by the servomotor is moved by a push button operation to reach a correct register position.

The term "twist adjustment of a printing plate" refers to an operation of correcting a state in which a printing plate is mounted on a plate cylinder with a phase shift in the left-right direction in the circumferential direction of the plate cylinder. As a document disclosing the technology, Japanese Utility Model Application Laid-Open No.
No. 1 (cylinder cocking system)
No. 56146 (plate-cocking system).

[0006] In any case, these register adjustment operations are:
The remote control is performed from an operation stand provided separately from the printing press main body.However, as the operator can see at a glance the register adjustment amount of the plate cylinder in the axial and vertical directions and the plate twist adjustment amount, It is convenient.

[0007]

2. Description of the Related Art In the techniques disclosed in Japanese Patent Application Laid-Open Nos. 58-69056 and 58-78766, the amounts of adjustment of the plate cylinder in the axial direction and the vertical direction are independently controlled. It is only displayed digitally. In Japanese Utility Model Laid-Open No. 53149/1987 by the same applicant as the present application, there is disclosed a technology for displaying the registration adjustment amounts of the plate cylinder in the axial direction and the vertical direction in a cross shape. It has nothing to do with the amount of twist adjustment of the plate.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an advanced register adjusting display device for a sheet-fed printing press. The purpose is to display the register adjustment amount in the direction and the twist adjustment amount of the printing plate in association with each other so as to be easily understood intuitively.

[0009]

For this purpose, the present invention provides:
The register adjustment amounts in the axial direction and the circumferential direction of the plate cylinder are displayed on two axes orthogonal to each other.
The twist adjustment amount of the printing plate is displayed on a straight line oblique to the axis.

[0010]

In this manner, the register adjustment amount in the axial direction / circumferential direction of the plate cylinder is displayed in a cross shape, and the twist adjustment amount of the printing plate is displayed in a so-called cross-shaped manner. In addition, various types of information relating to register adjustment can be associated with each other, and can be obtained at a glance and intuitively.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; FIG. 1 is a plan view showing an embodiment of a register adjustment display device of a sheet-fed printing press according to the present invention, and FIG.
FIG. 3 is an operation explanatory diagram of the device of the present invention, and FIG. 3 is a circuit block diagram for operating the device of the present invention.

In FIG. 1, the horizontal axis (1) (in the drawing, the vertical direction due to the arrangement) and the vertical axis (2) orthogonal thereto, a large number of display elements are linear. And form a scale. This is shown in FIG.
When register adjustment operation is performed on the plate cylinder (3) in its axial direction (indicated by reference numeral (4)) and in the circumferential direction (indicated by reference numeral (5)), each register adjustment amount is, for example, 2/10.
It is displayed in units of 0 mm.

The registration operation itself in the axial direction / circumferential direction of the plate cylinder (3) is already well known as described above (JP-A-58-69056, JP-A-58-69056). 7
No. 8766), and the plate cylinder (3) is moved in a minute unit in each direction by a combination of a servomotor as a drive source and a potentiometer as a measuring means.

Returning to FIG. 1, a straight line (6) obliquely intersecting the two axes (1) and (2) about the intersection of the two axes (1) and (2) orthogonal to each other. , (7),
On (8) and (9), a large number of display elements are similarly arranged to form a scale. About 2 axes (1) and (2)
These straight lines (6), (7), (8), and (9), which are formed so as to cross each other by shifting the phase by 5 degrees, are shown in FIG.
As shown in the figure, the printing plate (1) wound around the outer circumference of the plate cylinder (3)
The twist adjustment amount of 0) is also shown in units of 2/100 mm.

As described above, in order to obtain the effect of adjusting the twist of the printing plate (10), a cylinder cocking method for twisting the plate cylinder (3) (Japanese Utility Model Application Laid-Open No. 62-119231).
And a plate cocking system (JP-A-62-56146 and JP-A-1-108046) for literally moving the printing plate (10) on the plate cylinder (3). From the viewpoint of the movement result of the printing plate (10) itself, the gripping side (shown by a thick line) of the printing plate (10) is synthesized in the axial direction and the circumferential direction of the plate cylinder (3). It comes down to exercising. Therefore, when the left gripper side is moved in the circumferential direction on each of four straight lines (6), (7), (8), and (9) (reference numeral (1)
1)), when the gripper side is moved rightward in the axial direction (reference numeral (12)), when the gripper side is moved leftward in the axial direction (reference number (13)), the right gripper side is circumferential. (Indicated by reference numeral (14)). Of course, since the movement of the printing plate (10) on the gripping side is a combined movement in the axial direction / circumferential direction, of these straight lines (6), (7), (8) and (9), Two lines may display simultaneously.

FIG. 3 shows, for reference, an electric circuit for driving the plate cylinder (3) or the printing plate (10) for register adjustment display and register adjustment operation by the device of the present invention. First, the circuit shown in FIG.
A description will be given of the case of using for register adjustment display and operation in the circumferential direction. Measurement means (16) such as a potentiometer provided with a drive source (15) such as a servo motor for adjusting and driving the plate cylinder (3) is provided. After the measured value according to (1) enters the radiating circuit (17), an absolute value is obtained by the circuit (18), and further, the display driving circuit (19)
Then, through the display circuit (20), the display device lights up on the two orthogonal axes (1) and (2), and the register adjustment amount is displayed. Further, the measured value by the measuring means (16) is also inputted to the comparison circuit (21). The comparison circuit (21) receives command information from a push button (22) for moving the plate cylinder (3) in the positive direction or the negative direction in the axial direction / circumferential direction, respectively, in the cylinder selection circuit (23) (for multicolor printing). After specifying the number of color cylinders to be moved, the measured values are compared with the command information, and a drive circuit (24) such as a servo motor is provided.
Then, the drive source (15) is operated, and the register adjustment operation of the plate cylinder (3) is performed.

On the other hand, when the circuit of FIG. 3 is used for adjusting the twist of the printing plate (10), the display circuit (20)
The display elements on the straight lines (6), (7), (8) and (9) are turned on, and the measuring means (16) and the driving source measure the combined movement of the printing plate (10). And a potentiometer and a servo motor to be realized. The push button (22) is also used to designate the movement of the printing plate (10) as described above.

[0018]

According to the device of the present invention, various information relating to register adjustment can be associated with each other in a limited space of the operation stand and can be obtained at a glance and intuitively. This greatly contributes to the improvement of printing quality and printing quality.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a register adjustment display device of a sheet-fed printing press according to the present invention.

FIG. 2 is a diagram illustrating the operation of the device of the present invention.

FIG. 3 is a circuit block diagram for operating the device of the present invention.

[Explanation of symbols]

 1 horizontal axis 2 vertical axis 3 plate cylinder 6,7,8,9 straight line 10 printing plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A register adjustment amount for each of an axial direction and a circumferential direction of a plate cylinder (3) is displayed on two axes (1) and (2) orthogonal to each other. , (2)
On the straight lines (6), (7), (8), (9) oblique to
A register adjustment display device for a sheet-fed printing press configured to display a twist adjustment amount of the printing plate (10).