JPH06262753A - Printing plate-fitting device - Google Patents

Abstract

PURPOSE:To obtain a printing plate-fitting device which can automatically accurately be registered without requiring manual regulation. CONSTITUTION:Clamping standards 2, 3 in a top and bottom direction a left and right direction which are provided to a clamping-device on a clamp root side, and a top and bottom receiving part 13 and a left and right presser part 14 which are opposed to the left and right direction clamping standard 3 and pivot centering a pin 12, are integrally provided. Besides, a cross pushing means 15 of which a receiving part 13 is energized with a cushioning spring 16, and a tail pushing means 20 which pushes a clamping tail side of a printing plate 1 in the top and bottom direction are provided to a printing plate-fitting device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-fed printing press for multicolor printing, and more particularly to a plate mounting apparatus for automatically registering a plate helicopter as a reference.

[0002]

BACKGROUND OF THE INVENTION In a multi-color sheet-fed printing press, automation of frequent plate changing work is strongly desired in order to shorten so-called preparation time.

[0003]

2. Description of the Related Art In order to improve the efficiency of plate changing work, a U-shaped hole is punched out at the front end of a printing plate as disclosed in, for example, Japanese Patent Application Laid-Open No. 4-229268. Although there was a technique as a standard for registering, the applicant of the present application, in order to further improve the efficiency, Japanese Patent Application No. 4-3125
In No. 64, we proposed a registration method based on the helicopter of the printing plate.

That is, as shown in FIGS. 5 and 6, a pair of gripper side clamping devices and gripper side clamping devices clamp the gripper side clamping device of the plate cylinder on which the plate (1) is stretched. Gripping reference (2) in the vertical and horizontal directions of the plate cylinder based on the helicopter of the plate (1),
(3) is provided, and on the other hand, the plate registration measuring device (4) also has the same positional relationship as the gripping standards (2) and (3), and the plate cylinder of the plate cylinder (1) is also used as a standard. The measurement standards (5) and (6) for the vertical direction and the horizontal direction are provided, and the plate registration is performed with the helicopter of the plate (1) made in contact with the measurement standards (5) and (6). Place it on the adjusting device (4),
Of the reference marks of the plurality of printing plates (1), the measured value of one standard printing plate and the measured value of the remaining printing plate are subtracted to obtain register information, and a series of plate cylinders is based on this register information. This is a method for adjusting the register of the printing plate. Further, according to this method, there is no need for register adjustment work after printing, and there is an advantage that a required measuring device can be made simple and inexpensive.

[0005]

DISCLOSURE OF THE INVENTION The present invention is a technique carried out in relation to the above-mentioned method of register adjustment of a printing plate, and its object is to perform automatic register registration without requiring manual adjustment. It is to obtain a plate mounting device capable of performing.

[0006]

To this end, the plate mounting apparatus according to the present invention is provided with a grip reference (2), (3) in the up / down direction and the left / right direction provided on the grip side clamping device (9). ), And a vertical receiving portion (13) and a horizontal pushing portion (14) which are located on the opposite side of the left and right gripping reference (3) and are rotated around the pin (12). The lateral pushing means (15) which is integrally provided and in which the receiving portion (13) is urged by the buffer spring (16), and the tail pushing means (presses the gripping tail side of the printing plate (1) in the vertical direction ( 20) and are included.

[0007]

When the plate edge to be clamped by the gripper side clamping device (9) hits the receiving portion (13) of the lateral pushing means (15) during the mounting operation of the printing plate (1), the pin (1
The plate (1) is pressed against the lateral gripping reference (3) by the force of the pushing portion (14) which rotates integrally around the 2), and finally the vertical gripping reference (2). Since it will come into close contact with it, the mounting work will be simple and accurate.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a plan view showing an outline of a plate mounting apparatus according to the present invention, FIG. 2 is a side view showing an outline of the apparatus of the present invention more practically, and FIG. 3 is an enlarged view of a main part of the apparatus of the present invention. FIG. 4 is also an operation explanatory diagram.

As shown in FIG. 2, the plate cylinder (8) of the printing press has a gripper side clamp device (9) for gripping the plate edge of the printing plate (1) and a gripper end side clamp device (9) for gripping the plate tail. 1
And (0) are provided in a pair in the cylinder axis direction, and the plate (1) is stretched around the outer periphery of the plate cylinder (8) by both clamp devices (9) and (10). The device of the present invention is used when gripping the printing plate edge on the gripping side clamping device (9), and therefore, as described in the section of the prior art, the gripping side clamping device (9). Clamp base (11)
The gripping reference (2) for positioning the helicopter of the printing plate (1) in the vertical direction (vertical direction in FIG. 1) and the gripping reference for positioning in the left-right direction (horizontal direction in FIG. 1). (3) and are provided. Such gripping references (2), (3) can be specifically stopper projections provided upright on the clamp base (11) of the gripping side clamping device (9). Also, this gripping criterion (2),
Since (3) serves as a standard for mounting the printing plate, it must be accurately arranged in consideration of the size of the printing plate (1) and the like. In any case, when the printing plate is attached, the helicopter of the printing plate (1) is brought into contact with these gripping standards (2) and (3), and the vertical direction and the left-right direction are positioned,
The edges of the printing plate (1) are gripped.

As shown in FIGS. 1 and 3, a pin (12) is provided upright on the clamp base (11) at a position opposite to the grip reference (3) in the left-right direction. The lateral pushing means (1) has a receiving portion (13) and a pushing portion (14) integrally in a substantially vertical positional relationship with each other.
5) is rotatably attached. This side pushing means (1
The receiving portion (13) of 5) receives the plate edge of the printing plate (1) in the top-bottom direction, while the pressing portion (14) located substantially in an L-shape with the receiving portion (13) is , The edge of the printing plate (1) in the left-right direction. Further, the receiving part (1
3), the buffer spring (16) causes the pin (1
It is urged counterclockwise (also called plate edge direction) around 2).

When the printing plate is mounted, as shown in FIG. 2, an intermediate portion of the flexible printing plate (1) is guided by the guide roller (18) of the protective cover (17) of the released plate cylinder (8). It is supported. In the device of the present invention, since the flexible printing plate (1) generates a force to come into contact with the gripping reference (2) in the vertical direction, the protective cover (17) is generated.
A support arm (19) for suspending the plate is provided with a bottom edge pushing means (20). Such a pushing means (2
0) is sufficient as a temporary stop stopper for the plate bottom attached to the bar supported at the tip of the support arm (19), and such a tail pushing means (20) allows flexible plate (1). ) The vertical pressing force is generated based on the warp. Needless to say, the tail pushing means (20) is not limited to the temporary stopper provided on the support arm (19).

Next, the operation will be described. Printing plate (1)
When the plate edge of the plate is inserted into the gripping side clamp device (9) via the guide roller (18) of the protective cover (17) and the plate bottom is pressed by the tail pushing means (20) in the vertical direction, The plate edge is a receiving portion (1
Hit 3). The receiving portion (13) has a buffer spring (1
Since it is urged toward the plate bottom by 6), the shock at the time of contact is relaxed, but the plate edge advances despite the force of this buffer spring (16). At this time, the pin (12)
The L-shaped pushing portion (14) of the lateral pushing means (15) which rotates around the center pushes the left end portion of the printing plate (1). Then, the movement of the plate (1) in the vertical direction based on the warp and the pressing force to the right of the pushing part (14) of the lateral pushing means (15) are combined to form the plate (1). The printing plate edge comes into a perfect contact with the gripping standards (2) and (3) in the up / down direction and the left / right direction, and the registration is automatically and accurately performed.

[0013]

According to the plate mounting apparatus of the present invention, the plate registration can be performed automatically and accurately, which can greatly contribute to the efficiency of the plate changing operation.

[Brief description of drawings]

FIG. 1 is a plan view showing an outline of a plate mounting apparatus according to the present invention.

FIG. 2 is a side view showing the outline of the device of the present invention more practically.

FIG. 3 is an enlarged view of a main part of the device of the present invention.

FIG. 4 is also an operation explanatory diagram.

FIG. 5 is a diagram of a gripper side clamping device for explaining a plate mounting method which is a premise of the device of the present invention.

FIG. 6 is a diagram of a measuring device similarly.

[Explanation of symbols]

 1 printing plate 2 gripping standard 3 gripping standard 7 reference mark 8 plate cylinder 9 gripping side clamping device 11 clamp base 12 pin 13 receiving part 14 pushing part 15 side pushing means 16 buffer spring 19 support arm 20 bottom pushing means

Claims (1)

[Claims] 1. Upside-down / horizontal direction gripping standards (2), (3) provided on the gripping side clamp device (9).
And a horizontal receiving portion (13) and a horizontal pushing portion (14) which are located on the opposite side of the left and right gripping reference (3) and are rotated around a pin (12). To have
Moreover, the buffer spring (16) is used to receive the receiving portion (13).
A plate mounting device having a lateral pushing means (15) biased by the and a tail pushing means (20) for pushing the edge of the printing plate (1) in the vertical direction.