JPS6161981B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is capable of finely adjusting the plate mounting position by moving the printing plate mounted on the plate cylinder in the circumferential and/or axial direction while the printing plate is mounted on the plate cylinder. Regarding printing plate cylinders.

Usually, the plate cylinder has a surface layer and a main body that are integrated, and has a plate mounting device on the surface layer. Therefore, once a printing plate is mounted on a plate cylinder, it is difficult to make fine adjustments to the plate mounting position.Especially when multiple printing plates are mounted on a plate cylinder, it is difficult to make fine adjustments to the plate mounting position. Although it is possible to adjust the mounting position of each printing plate integrally in the circumferential and axial directions, it is not possible to adjust the mounting position of each printing plate individually. Generally, the printing position is determined when the printing plate is installed, but this is extremely inadequate in cases such as precision printing where accuracy of the printing position is required, and it takes time and effort to reinstall the printing plate. However, sufficient results still could not be obtained. Utility Model Publication No. 35-19903 is also known, and this idea was based on the idea that a cylindrical original plate was fitted into the plate body, and the mounting position could be adjusted to the left and right. Although this article relates to the structure of the adjustment device, it does not include fine adjustment of the plate mounting position by moving in the cylindrical and axial directions.

The present invention eliminates these drawbacks and changes the mounting position of the printing plate by individually moving the plate mounting surface layer, which is separate from the plate cylinder main body, while the printing plate is mounted.
That is, the present invention provides a plate cylinder that allows the printing position to be accurately adjusted without requiring much time or effort.

Now, the present invention will be explained based on the drawings showing an embodiment. The plate mounting plate is formed so that the circumferential surface of the plate cylinder 1 is separate from the plate cylinder main body 2 and has a number and width corresponding to the number and width of each printing plate. In this embodiment, there are eight plate mounting surface parts 3 corresponding to eight printing plates 4 in the surface layer part 3 . A sliding foot 5 is provided protruding from each surface layer portion 3, and this sliding foot 5 is provided within the plate cylinder main body 2 with a gap 6 slightly wider than the sliding foot 5. It is hung in the sliding groove 7. Reference numeral 8 denotes a rotating shaft inserted into the plate cylinder 1, and a disk 9 fixed to the rotating shaft 8 fits into a fitting groove 10 provided on the back surface of the plate mounting surface layer 3 to form an axial movement device. 11. A pinion 12 is fixed to the rotating shaft 8' and meshes with a rack 13 fixed to the back surface of the plate mounting surface portion 3 to constitute a circumferential movement device 14. 15 is a meshing portion between the rotating shaft 8 and the support column 16, and 17 is a bearing. 18,1
Reference numerals 8' designate knobs for the rotating shafts 8 and 8', respectively. 19
is the plate cylinder axis, and 20 is the gap between the support column 16 and the plate cylinder 1. A plurality of axial movement devices 11 and circumferential movement devices 14 are installed corresponding to the number of plate mounting surface portions 3. In this embodiment, eight of each are installed. Further, in this embodiment, the circumferential direction moving device 14 and the axial direction moving device 11 are separated from each other by separate rotating shafts 8,
8', but these devices may be operated by one coaxial shaft.

In the above configuration, when the rotating shaft 8 is rotated by rotating the knob 18, the rotating shaft 8
6, it moves in the direction of the plate cylinder axis 19, and therefore the disk 9 also moves in the axial direction. However, since the disk 9 is fitted into the fitting groove 10, the movement of the disk 9 in the axial direction corresponds to the movement of the plate mounting surface layer 3 in the axial direction. Further, when the rotating shaft 8' is rotated, the rotating shaft 8' rotates in the circumferential direction without moving in the axial direction because of the bearing 17.
Therefore, the pinion 12 also rotates in the circumferential direction. However, since the pinion 12 meshes with the rack 13, rotation of the pinion 12 in the circumferential direction causes movement of the plate mounting surface layer 3 in the circumferential direction. Since there is a gap 6 between the sliding feet 5 of the plate mounting surface layer 3 and the sliding groove 7 of the plate cylinder main body 2, within the range of this gap 6, the plate mounting surface layer 3 moves around the circle of the plate cylinder main body 2. It slides on the circumference.

In order to adjust the plate mounting position of the printing plate 4 mounted on the plate cylinder 1, that is, the printing position, the plate mounting surface layer 3 on which the printing plate 4 that requires adjustment is mounted is moved in the axial direction according to the above example. The plate cylinder axis 19 is moved by the displacement device 11 and/or the circumferential displacement device 14.
Fine adjustment can be made by moving the curvature in the direction or (and) the circumferential direction. Since the printing position is adjusted in advance when the printing plate 4 is attached, the fine adjustment according to the present invention is usually within a range of about ±0.5 mm.

8 to 12 show other embodiments of the invention. In these figures, the bearer 21 fitted into the plate cylinder 1 is connected to the bolt 22 shown in FIG.
It is fixed to the plate cylinder main body 2 by. A plate mounting surface layer 3, which is separate from the plate cylinder main body 2, is fitted onto the plate cylinder main body 2 so as to rotate and slide very slightly in the circumferential direction and the axial direction. In order to facilitate removal from the plate cylinder main body 2, the plate mounting surface layer 3 has a two-split structure as shown in FIG. 12, and is attached and assembled to the plate cylinder main body 2 with bolts 23. Further, both ends of the plate mounting surface layer 3 are held down by rings 24, and serve as a safety device that supports part of the centrifugal force generated on the plate mounting surface layer 3 due to rotation.
A square groove 25 is bored in the plate cylinder body 2, and a block 26 is mounted so as to be slidable in the axial direction. There are two keys 27 projecting from the outer surface of the block 26 at a certain angle with respect to the center line of the plate cylinder 1, and are inserted into key grooves (not shown) in the plate mounting surface layer 3.

The reason why the key 27 is installed at an angle is so that when the block 26 is moved in the axial direction, the plate mounting surface layer 3 can be slightly moved in the circumferential direction due to force decomposition. This is to do so.
Of course, a key groove may be provided in the block 26 and the key may be embedded in the plate mounting surface layer 3. A thread is cut in the axial direction of the distal end of the block 26, and a threaded shaft 28 is screwed into this through a piece 29. The tip of the screw shaft 28 has a square head shape for easy rotation. The piece 29 is slidably mounted in the same square groove 25 as the block 26, and its protrusion 30 is fitted into a groove in the plate mounting surface 3. A square groove 25' is bored in the plate cylinder body 2 at a position directly opposite to the square groove 25, and a piece 29' is slidably mounted thereon. The piece 29' has a protrusion 30', which allows the piece 29' to fit into a groove in the plate mounting surface part 3.
Each of the pieces 29, 29' has a male thread formed at its tip, and is fitted into a female thread of the rotating shaft 31, 31'. The rotating shafts 31, 31' are connected to gears 32, 3
2' is fixed with a key and nut and fitted into the hole of the bearer 21. Gear 32, 32'
meshes with a gear 33 rotatably fitted to the shaft of the plate cylinder 1 on the frame side of the bearer 21. The fixing ring 34 is for fixing the gear 33 in the axial direction.
Gear 33 further meshes with gear 35 shown in FIG. The gear 35 is rotatably fixed to a gear shaft 36 fitted into a hole in the bearer 21 with a key 37 and a collar 38.

Fine adjustments in the circumferential direction can be made by rotating the square head of the screw shaft 28, so that the screw can be adjusted in the block 2.
6 is moved in the axial direction, and the sloped surface of the key 27 on the block 26 presses the sloped surface of the keyway of the plate mounting surface layer 3. The plate mounting surface layer 3 has pieces 29, 2 in another groove.
Since the protrusions 30, 30' of 9' fit together and restrict movement in the axial direction, it rotates slightly in the circumferential direction.

Next, fine adjustment in the axial direction is achieved by rotating the square head of the gear shaft 36, so that the gear 35 passes through the gear 33 that meshes with it, and then the gears 32, 32' and the rotating shafts 31, 31' fixed thereto. Rotate. Rotating axis 3
1 and 31' and the screws of the pieces 29 and 29', the pieces 29 and 29' are moved in the axial direction. Therefore, the grooves in the plate mounting surface layer 3 are connected to the protrusions 3 of the pieces 29, 29'.
0 and 30' push and pull to slightly move the plate mounting surface layer 3 in the axial direction. In this case, piece 29
moves the block 26 by the amount of movement, but since the relative position of the block 29 and the block 26 remains unchanged, the plate mounting surface 3 does not rotate in the circumferential direction. The reason why the gear 35 is provided is to eliminate variations in slight movement caused by the screw even if the backlash of the gear acts equally on the gear 32 (it is also possible to provide a square head on the rotating shaft 31). This is also because the square heads gather in one direction, making it possible to adjust both the circumferential direction and the axial direction without rotating the plate cylinder 1 by half a turn.

As is clear from the above, according to the present invention, the plate mounting position of the printing plate can be changed while the printing plate is mounted on the plate cylinder.
In other words, since the printing position can be finely adjusted, it does not require time and effort to reinstall the printing plate, and it can also provide sufficient satisfaction for precision printing that requires accuracy. There is an effect that it can be done. Furthermore, if the structure is configured as described in claim 2, the plate mounting positions of a plurality of printing plates mounted on the plate cylinder can be individually finely adjusted, so that the above-mentioned effects of the present invention can be further improved. able to demonstrate.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view, FIG. 2 is a schematic cross-sectional view of FIG. 1, FIG. 3 is a cross-sectional view taken along line A-A, and FIG. 5 is a view taken in the C direction of FIG. 3, FIG. 6 is a view taken in the D direction of FIG. 4, FIG. 7 is an enlarged view of the main part of FIG. 9 is a plan view of FIG. 8, FIG. 10 is a sectional view taken along line E--E of FIG. 11, FIG. 11 is a sectional view taken along line FF of FIG. 8, and FIG. 8
It is a sectional view taken along the line GG in FIG. 1... Plate cylinder, 2... Plate cylinder main body, 3... Plate mounting surface layer, 4... Printing plate, 5... Sliding foot, 6... Gap, 7... Sliding groove, 8... Rotation Axis, 9...disk,
10... Fitting groove, 11... Axial direction moving device, 12
... Pinion, 13 ... Rack, 14 ... Circumferential direction moving device, 15 ... Meshing part, 16 ... Support column, 1
7... Bearing, 18, 18'... Knob, 19... Plate cylinder shaft, 20... Gap.

Claims (1)

[Claims] 1. A plate mounting surface layer separate from the plate cylinder body is formed on the circumferential surface of the plate cylinder, and the surface layer portion is slidably attached to the plate cylinder body, and is mounted inside the plate cylinder. A printing plate cylinder comprising a built-in circumferential movement device and an axial movement device to enable fine adjustment of the surface layer portion in the circumferential direction and/or the axial direction. 2. The plate mounting surface layer is formed to have a number and width corresponding to the number and width of a plurality of printing plates mounted on the plate cylinder, and a circumferential direction moving device and an axial direction moving device are formed corresponding to each plate mounting surface layer. The printing plate cylinder according to claim 1, characterized in that a plurality of printing plate cylinders are provided. 3 A sliding foot is provided protruding from the plate mounting surface layer, and a sliding groove is provided in the plate cylinder body to slidably hook the sliding foot, and the circumferential direction moving device is fixed to the rotating shaft. It consists of a pinion and a rack fixed to the back side of the plate mounting surface part that meshes with the pinion, and the axial movement device is fitted to a disk fixed to a rotating shaft built in the plate cylinder and the disk. A printing plate cylinder according to claim 1 or 2, comprising a fitting groove provided on the back side of a plate mounting surface portion.