JPS6213802Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an auxiliary tool for properly attaching a printing plate to a printing cylinder of a printing press.

When attaching a printing plate to the plate cylinder of a printing press, adjust so that the baseline drawn at the center of the square side of the printing plate matches the baseline drawn at the center of the plate clamp, and then tighten the plate with the tightening screw. Fix one end (quae side),
After that, the packing was inserted and the plate was wrapped around the plate cylinder, and then the other end of the plate (the side of the plate) was fixed with a plate clamp.

There is also a method in which a so-called punch pin system is used to attach the printing plate without providing a baseline on the printing plate or plate clamping fittings.

However, with these conventional methods, although the mounting position of the printing plate on the square side can be precisely regulated, the mounting position on the square side, especially the relative positional relationship between the square side and the square side, cannot be controlled. Since it is only visually judged whether the base lines overlap on the perpendicular line, the printing plate may not be properly installed due to elongation or bending of the printing plate, and in particular, the printing plate may be fixed without being able to clearly determine the installation position on the square side. It may take a lot of time to correct the mounting position.

The present invention was developed in view of the above-mentioned circumstances, and the connecting plate has a front plate equipped with a magnifying lens on opposite sides, and a printing plate attached to the plate cylinder of the printing press. A rear panel provided with a transparent plate having a reference line sufficiently longer than the distance connecting the baselines formed on the square side and the square side is provided so as to face each other, and the rear panel does not face the front panel. By fitting the desired portion of the face plate into the position setting recess provided in the center of the gap provided on the plate cylinder of the printing press, the angle formed between the rotation axis of the plate cylinder and the reference line is always maintained. This is a printing plate positioning device characterized by being provided with right-angled protrusions.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view of the present invention, in which 1 is a connecting plate, 2 is a front plate, 3 is a magnifying lens, 4 is a reference line, 5 is a transparent plate, 6 is a rear bright plate, and 7 is a protrusion. It shows.

A front plate 2 and a rear plate 6 are provided on each opposing side of the connecting plate 1 made of a metal plate, a synthetic resin plate, etc.
are set up so that they are facing each other. The front plate 2 has a structure in which a magnifying lens 3 is fitted into a through hole provided in the center of a plate-shaped body such as a metal plate or a synthetic resin plate. As will be described later, this magnifying lens 3 magnifies the overlap between the reference line 4 of the transparent plate 5 and the base lines 13 and 14 made on the quadrilateral side and the quadrilateral side of the printing plate 12 fixed to the plate cylinder 11 of the printing machine. It is used when confirming.

As can be seen from the drawing, the rear plate 6 facing the front plate 2 has a structure in which a transparent plate 5 on which a reference line 4 is provided is attached to a frame 8 made of metal, synthetic resin, or the like. A desired part of the rear plate 6 that does not face the front plate 2 (the part of the frame 8 in FIG. 1)
is provided with a pair of protrusions 7. This protrusion 7 is
By fitting the tip end into the position setting recess 16 provided in the center of the gap 15 of the plate cylinder 11, the angle between the rotation axis of the plate cylinder 11 and the reference line 4 is always a right angle. Furthermore, the plate positioning tool 10 is positioned so that the respective base lines 13 and 14 located at the center of the square side and the square side of the printing plate 12 fixed to the plate cylinder 11 overlap at both ends of the reference line 4. This is to allow the transparent plate 5 to be positioned. FIG. 2 is an explanatory view of the present invention in use, in which the protrusions 7, 7 are fitted into the position setting recesses 16, and the reference line 4 is located at the center of the plate cylinder 11.

Next, the actual work of attaching the printing plate 12 using the printing plate positioning tool 10 will be explained.

First, the square side of the printing plate 12 is set in the plate clamp 17 of the plate cylinder 11, and the base line 13 indicating the center of the square side of the printing plate 12 and the base line 19 formed on the plate clamp 18 are aligned in a straight line. After doing this, screw 2
Tighten to 0 to secure. Next, a packing sheet is inserted between the printing plate 12 and the printing cylinder 11, and the printing cylinder 11 is slowly rotated while applying pressure, so that the flat side of the printing plate 12 is in a position where it can be easily fixed with the plate clamping fitting 21. move it. Set the square side into the plate clamp 21, and tighten the screw 22 of the plate clamp 21.
Tighten it lightly.

Next, the protrusions 7, 7 of the plate positioning tool 10 are fitted into the position setting recesses 16, 16 of the gap 15. Next, the reference line 4 is passed through the magnifying lens 3.
Observe how the base lines 13, 19 and the base line 14 formed on the square side of the printing plate 12 overlap.
If each of the above-mentioned base lines and the reference line exactly overlap, it indicates that the printing plate 12 is properly mounted at a predetermined position on the plate cylinder 11. If they do not overlap, tighten screw 2 that was lightly tightened earlier.
After loosening the screws 2 and moving the square side so that the base line 14 overlaps the reference line 4, firmly tighten the screws 22 to fix the printing plate 12.

Since the present invention has the above-mentioned configuration, a protrusion is fitted into a position setting recess provided in the gap of the plate cylinder.
The printing plate can be mounted with good registration accuracy by simply aligning the reference line with the base lines drawn on the square side and the square side of the printing plate so that they overlap in a straight line. Therefore, the work of moving the plate cylinder and printing plate due to poor plate placement can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the structure of the present invention, and FIG. 2 is an explanatory view of the present invention in use. DESCRIPTION OF SYMBOLS 1... Connecting plate, 2... Front plate, 3... Magnifying lens, 4... Reference line, 5... Transparent plate, 6... Rear plate, 7... Protrusion, 8... Frame, 10... ...Plate positioning tool, 13, 14, 19...Base line.

Claims (1)

[Scope of utility model registration request] On each side of the connecting plate facing each other, there is a distance between the front plate equipped with a magnifying lens and the base line formed on the square side and the square side of the printing plate attached to the plate cylinder of the printing press. A transparent plate provided with a reference line sufficiently longer than The invention is characterized by a projection that is fitted into a position setting recess provided in the center of the gap so that the angle between the rotation axis of the plate cylinder and the reference line is always a right angle. Positioning tool for printing plates.