JPS62221541A - Automatic press plate installation device - Google Patents

Abstract

PURPOSE:To shorten operation time without requiring skill for exchanging a plate cylinder, by a method wherein an R groove is provided at the holding end of the press plate, the pin engaged with this R groove being projectingly provided to a press plate guide table and the plate cylinder, and the R groove part of the press plate is engaged with the pin of the plate cylinder to be disengaged from the pin of the table by the self weight of the printing form plate and fixed by a vice. CONSTITUTION:A press plate 9 is kept on a press plate guide table 1 under a state in which a plate positioning pin 15 is inserted into an R groove 18. The press plate guide table 1 to which the press plate 9 is installed, is fed as it is toward the vice 12 on the holding side of a plate cylinder, and the plate positioning pin 15 of the press plate guide table is moved and stopped at a fixed point E downward by a distance 1. Then, the holding of pin 15 is brought down and at the same time, the holding of the press plate 9 is released from the press plate guide table 1. The press plate 9 is moved by the slope descent due to the self weight of only the press plate by a fixed distance L to the vice 12 on the holding side of the plate cylinder 2, fixed to the vice 12 on the holding side, and wound on the plate cylinder 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field] The present invention relates to a plate mounting device used for automatic plate exchange in a sheet-fed printing press.

[Conventional technology]

Figures 5 and 6 illustrate recent technology.
FIG. 5 is a side view of the entire printing plate changing device, and FIG. 6 is a diagram showing the state of the new printing plate in the cassette.

In FIG. 5, A, B, and C indicate states when the cassette 01 is in the preparation position, standby position, and exchange position, respectively. Further, FIG. 6 shows a state diagram when the cassette 01 is in the exchange position.

To explain the printing plate replacement work based on Fig. 6, cassette 0
1 is moved to this position by operating the push button switch. At the position where the vise tail side 03 of the plate cylinder 02 directly faces the cassette 01, loosen the vise tail side 03 fully automatically or manually to remove the tail side of the old printing plate 04 from the plate cylinder, and then remove the cassette. The bottom side of the old printing plate is clamped on the clamp mounting o5 of 01, and the old printing plate 04' is rolled up by the winding device o6 into the old printing plate storage chamber 07 of the cassette o1.

The operation of the forward winding device 06 and the plate cylinder 02, which are nearing the end of winding, is stopped. At this point, loosen the vise grip side 012 fully automatically or manually, and completely wind up the old drama [04] into the old drama version storage chamber 07 of the cassette 01.

Next, in Figure 6 ((+, (b), new edition 09t-
Cue device 01 from new printing version storage room 010 of cassette 01
1, pull out the end portion, grip it with the vise grip side 012 of the full plate cylinder 02, rotate the plate cylinder in the direction of the arrow, and wrap the new printing plate 09 around the cylinder. When the winding is completed, the end of the new printing plate is grasped with the vise end side 03, and the fixing of the new printing plate 09 is completed, and the exchange is completed.

[Problem that the invention seeks to solve]

Conventionally, when replacing a printing plate, the operator would hold the printing plate by hand and insert it into a vise on the gripping side of the plate cylinder, wrap it around the plate cylinder, and when the wrapping was completed, place the bottom side of the printing plate on the plate cylinder. It was fixed in a vise on the butt side.

Therefore, it is time for the operator to replace the plate cylinder! However, there were problems such as an increase in working time, that is, a long machine stop time.

[Means for solving the problem] Two R-grooves are provided at the gripping end of the printing plate, a pin that engages with the R-grooves is pivotally mounted on a table that guides the printing plate, and the guide is attached to the plate cylinder. A pin of the same size as the pin on the table is provided protrudingly, and due to the weight of the printing plate, the R groove portion of the printing plate engages with the plate cylinder pin and is fixed in a vise.

When adopting this method, we conducted experiments on the surface condition of the plate holding table, the size and shape of the table's inclination angle pin, the amount of slope sliding, etc., and verified the mounting accuracy of plate mounting and the reliability of the mounting mechanism. Find the optimal value to ensure etc.

[Effect]

The printing plate is held by two-point pin support, and the two-point pins are lifted up and down at a distance of several millimeters from the clamp device, and the plate is fed into a predetermined position in the clamp device using its own weight without shifting.

〔Example〕

In Figures 1 to 4, 1 is a plate guide table, 2μ
Plate cylinder, 3 is a rear vise, 9 is a printing plate, 12 is a grip side vise, 1
3 is a printing plate exchange plan i, 14 is a proximity device, 15 is a plate positioning pin of the plate guide table 1, 16 is a plate positioning pin of the plate cylinder 2, 17 is a rotating device for the plate positioning pin 15, and 18 is a printing plate 9 This is an R groove provided at the end of the grip.

As shown in FIGS. 1 and 3, the printing plate 9 is held on the plate guide table l while being inserted into the R groove 18 and the plate positioning pin 15.

In the plate changing device 13 used when attaching a new printing plate 9 to the plate cylinder 2, the plate guide table 1 with the printing plate 9't attached thereto is moved to the clamping side vise 12 of the plate cylinder 2 by the proximity device 14.
The plate positioning pin 15 of the plate guide table
is moved and stopped at a certain point below the distance IJI+](1.Next, the rotation device 17 of the plate positioning pin 15 is used to tilt the positioning pin 1st-, and at the same time the holding of the printing plate 9 is released from the plate guide table 1. A certain distance from the plate cylinder 2 to the gripping side vise 12 (due to the need for centering and positioning of the plate at the edge, it is loosely fitted near the gripping side vise 12 so that it can be set up and lowered freely). The distance (L) from the positioning pin 16 to the printing plate 9
It is configured to move by sliding down the slope due to its own weight and reach the grip side vise 12.

〔Effect of the invention〕

■ When inserting the gripping end of the printing plate into the plate clamping device,
Since the printing plate itself uses its own gravity to slide down the slope, no special power source is required for insertion, it is inexpensive, and there is no risk of failure.

■ The accuracy of plate mounting on the plate cylinder has been improved, and the plate is securely inserted into the clamping device. (In FIG. 3, the positioning pin 15 of the plate guide table and the positioning pin 16 provided on the plate cylinder 2 have the same dimensions, so the plate does not move and become misaligned.)

[Brief explanation of drawings]

1 to 3 show an embodiment of the automatic printing plate mounting device of the present invention. FIG. 1 is a side view of the entire device, and FIG.
3 is a detailed view of section A in the figure, FIG. 3 is a view taken from arrow B in FIG. 2, and FIG. 4 is a perspective view of the entire printing plate replacement amount. FIG. 5 is a side view of the conventional apparatus, and FIGS. 6B and 6B are diagrams showing the state of movement of the new printing plate in the cassette in FIG. 1... Plate guide table 2... Plate cylinder 3... Bottom side vise 9... Printing plate 12... Gripping side vise 13... Printing plate changing device 15.16... Plate positioning pier 18...R Mizo Fu's agent Patent attorney Shige Okamoto 2 people outside of the text Figure 4 Figure 5

Claims (1)

[Claims] In an automatic plate mounting device for mounting a new plate on a plate cylinder, a plate positioning pin is tiltably attached to the lower end of a plate guide table held at an angle, and the lower end of the plate placed on the plate guide table An R groove that engages with the plate positioning pin is provided on the edge, and a plate positioning pin that engages with the plate R groove is installed in the clamping side vise of the plate cylinder, and is close to the clamping side vise of the plate cylinder. Tilt the plate positioning pin of the plate guide table at the position
The printing plate on the table is moved downward along the table by its own weight, and the lower edge of the printing plate is gripped with a vise on the gripping side of the plate cylinder while the printing plate R groove is engaged with the plate positioning pin of the plate cylinder. An automatic printing plate mounting device characterized by: