JPH0453946Y2 - - Google Patents

Description

[Detailed description of the invention] The invention is a printing plate mounting device on a printing plate cylinder,
In particular, a gripping bending line is provided in the vertical and perpendicular directions,
This invention relates to a printing plate mounting device for mounting a printing plate on a plate cylinder, with one side end surface of the gripping end on the tip side of the gripping bending line being a reference end surface in the lateral direction.

The printing plates for each color in a multicolor printing press must be accurately registered in the vertical and lateral directions for each plate cylinder.

However, in the case of a printing plate, a gripping bending line is provided in a direction perpendicular to the above-mentioned vertical direction, and one end surface of the gripping end on the tip side of the gripping bending line is used as a reference end surface in the lateral direction. , since the end of the grip is attached to the grip of the plate cylinder along the grip bending line, the vertical registration can be accurately installed, but since there is no horizontal reference,
It was difficult to achieve accuracy in plate placement in the lateral direction.

Conventionally, when the printing plate is held in its mouth, its position has been determined by measuring the lateral position from the axial end of the printing cylinder using a scale.

For this reason, in the conventional positioning work of printing plates, it was necessary to apply a scale to each plate cylinder one by one, and this work was difficult and also had problems with accuracy.

The present invention was developed in consideration of the above-mentioned problems, and is a printing plate on a printing plate cylinder that allows accurate lateral positioning of the printing plate by an extremely simple procedure and with a simple configuration. The present invention aims to provide a mounting device.

Embodiments of the present invention will be described below based on the drawings.

In the figure, 1 is a plate cylinder, and 2 is a bearer attached to both ends of the plate cylinder 1. The plate cylinder 1 is provided with a printing plate holding hole 4 extending axially through the inside near its outer circumferential surface, and this holding hole 4 communicates with the outer circumferential surface of the plate cylinder 1 through a holding groove 5. has been done. Reference numeral 6 denotes a plate winding rod which is fitted through the holding hole 4, and both ends of the plate winding rod 6 are rotatably supported by the bearer 2. The plate winding rod 6 is provided with a gripper end groove 7 extending over a length corresponding to the plate cylinder 1. 8 is the above plate winding rod 6
This positioning collar 8 is located at one end of the plate cylinder 1 and on the reference pin hole side, and the inner end of this positioning collar 8 has a notched groove 9 in the circumferential direction. It is provided over a predetermined range.

Reference numeral 10 indicates a printing plate, and reference numerals 11a and 11b are pin holes drilled at the end of the grip for the pin system, and the round holes serve as reference pin holes. Reference numeral 12 indicates a gripping bending line that is bent using the pin holes 11a and 11b. The above pin holes 11a, 11b
are arranged in a direction perpendicular to the vertical direction of the printing plate 10, and the gripping bending line 12 is aligned with the pin holes 11a, 11.
It is provided parallel to the arrangement position of b. The tip end side of this gripping bending line 12 is a gripping end 12a, and the end of this gripping end 12a on the reference pin hole 11a side is a reference end surface 13 for a pattern provided on the printing plate 10. ing.

The pin holes 11a and 11b of the printing plate are punched by a plate puncher before the printing of the image, with the top and bottom abutting against each other and the reference end face 13 abutting against each other. Then, a pattern is printed using the pin holes 11a and 11b as a reference, and then the bending process is performed.

The mounting operation of the printing plate 10 in the above configuration will be explained.

The printing plate 10 with the gripping end 12a bent is inserted into the gripping groove 5 of the plate cylinder 1.
At this time, the reference end surface 13 on one side of the gripping end 12 a of the printing plate 10 is brought into contact with the end surface of the positioning collar 8 . In this way, the lateral position of the printing plate 10 with respect to the plate cylinder 1 can be determined accurately.

Next, the printing plate 10 is wound around the plate cylinder 1, and the end of the plate 10 is inserted through the grip groove 5 into the grip groove 7 of the plate winding rod 6, and by twisting the plate winding rod 6, the printing plate 10 is removed. is attached to the plate cylinder. At this time, since the gripping edge at the end of the printing plate 10 has almost no perpendicular accuracy with respect to the pattern, when the gripping end 12a of the printing plate 10 is fixedly wrapped around the plate cylinder 1, Fifth
As shown in FIG. 7, the reference end surface 13 which is the side end of the grip end 12a and the side end surface 10a of the end of the grip
may not match, but if the side end surface 10a on the gripping butt side deviates toward the positioning collar 8 side, that part may be moved from the notch groove 9 of the positioning collar 8 to the gripping butt of the printing stick 6. Insert into groove 7. It should be noted that the notch groove 9 is not necessarily necessary because perpendicular accuracy can be obtained if the pin hole machining is performed based on the direction perpendicular to the top and bottom.

As mentioned above, by abutting the reference end surface 13 against the positioning collar 8, the image position is always mounted at the same position from the plate cylinder reference position, and if each plate cylinder is at the zero point reference position, the horizontal register can be adjusted. It is possible to obtain the printing register in the horizontal direction without any operation.

The present invention is as described above, and a gripping bending line 12 is provided at one end in the vertical direction in a direction perpendicular to the vertical direction, and a gripping end 12a on the distal side of the gripping bending line 12 is provided. A printing plate 10 having one side end face as a reference end face 13 in the horizontal direction is used, and the gripping end 12a of the printing plate 10 is held in the gripping groove 5 provided in the plate cylinder 1, and the printing plate 1
0 is inserted through the gripping groove 5 and into the gripping hole 4 which communicates with the gripping groove 5.
In a printing plate mounting device for a printing plate cylinder, which is inserted into a gripping groove 7 provided in the printing plate cylinder and wound around the printing plate cylinder, the printing plate held in the gripping groove 5 is attached to one end of the plate winding rod 6. The positioning collar 8 for lateral positioning of the gripping end 12a of the printing plate 10 is fixed and fitted in the axial direction by abutting against the reference end surface 13 of the gripping end 12a of the printing plate 10. Since the printing plate mounting device is constructed, the printing plate 1 on the plate cylinder 1 is
0, the horizontal positioning is performed simply by abutting the reference end surface 13 of the printing plate 10 against the positioning collar 8, and the vertical and horizontal position of the printing plate 10 can be adjusted in an extremely simple procedure. The printing plate 10 can be accurately determined and mounted on the plate cylinder 1.

Furthermore, the configuration is such that the positioning collar 8 is simply fitted to the end of the printing plate winding rod 6, and the intended purpose can be achieved with an extremely simple configuration.

[Brief explanation of the drawing]

The drawings show the main parts of the embodiment of the present invention: Fig. 1 is a side view, Fig. 2 is a sectional view, Fig. 3 is a plan view of the printing plate, and Fig. 4 is shown along the - line in Fig. 5. 5 is an explanatory diagram showing a state in which a printing plate is attached; FIG. 6 is a sectional view taken along the - line in FIG. 5; and FIG. 7 is a part showing a state in which a printing plate is attached. FIG. 1 is a plate cylinder, 6 is a plate winding rod, 8 is a positioning collar, 10 is a printing plate, 12 is a folding curve, 12a is a gripping end, and 13 is a reference end surface.

Claims (1)

[Scope of utility model registration request] A gripping bending line 12 is provided at one end in the vertical direction in a direction perpendicular to the vertical direction, and this gripping bending line 12
A printing plate 10 is used in which one side end surface of the gripping end 12a on the distal side is a reference end surface 13 in the lateral direction, and the gripping end 12a of this printing plate 10 is connected to a gripping groove 5 provided in the plate cylinder 1. The gripping end of the printing plate 10 is inserted into the gripping groove 5, and the gripping end groove 7 is provided on the plate winding rod 6, which is inserted into the gripping hole 4 that communicates with the gripping groove 5. In a printing plate mounting device for a printing plate cylinder, which is inserted into a printing plate cylinder and wound around it, one end of the plate winding rod 6 has a gripping end 12a of the printing plate 10 gripped in the gripping groove 5. Plate mounting on a printing plate cylinder characterized in that a positioning collar 8 for lateral positioning of the gripping end 12a of the printing plate 10 is fixed and fitted in the axial direction by abutting the reference end surface 13. Device.