JPH0780290B2 - Printing device for offset rotary printing press - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus for a rotary offset printing press, which is arranged in a straight line tilted with respect to a strip-shaped image carrier running substantially horizontally. Four printing device cylinders are arranged, the straight line passing through the center of two printing device cylinders at least outside of the four printing device cylinders, inside of both,
The invention relates to a type in which a strip-shaped image carrier can pass between printing device cylinders configured as blanket cylinders, and the printing device cylinders can be moved away from each other by an eccentric adjusting member.

The problem to be solved by the invention is to improve the adjusting device of a switching device of the type mentioned at the outset.

According to the invention, the problem is that the cylinder journals of the blanket cylinder are respectively arranged on two eccentric liners arranged inside and outside, which are fixed in holes in the side walls of the printing device. , The eccentric liners have the same eccentric distance, the outer eccentric liner is connected to one common pull rod and the inner eccentric liner is connected to one common pull rod, respectively. Are moved linearly away from each other in the same direction, and slightly away from each other, with the axial center of the barrel journal always on the same side of the straight line and with the blanket cylinder in contact. All the eccentric liners by means of one adjusting device so that this axial center has the smallest distance to the straight line and approximately coincides with the center of the hole when It has been solved by making it possible to rotate inwardly and outwardly in the bore in opposite directions and by the same angle via two separate pull rods, which are respectively connected to the side eccentric liners.

Advantageous embodiments of the switching device according to the invention having the features of claim 1 are obtained by means of the features of claim 2.

Embodiments The printing devices shown can be arranged one behind the other in order to perform multicolor printing on both sides of a strip-shaped image carrier.
This type of printing device has four cylinders 2, 3, 4, 5 located one above the other, which are approximately one through the center.
The position is fixed on two common straight lines G. As a result, the cylinders are supported with respect to one another, so that the deflection and thus the undesired influence on the printing result and the risk are avoided or reduced. As is clear from the drawing, the strip-shaped image carrier T to be printed is placed substantially horizontally on both central cylinders 3,4.
In other words, since it is passed between the blanket cylinders, this belt-shaped image carrier T
Can be printed on both sides. This straight line G is more or less inclined in order to obtain a proper winding of the strip-shaped image carrier onto the inner and outer blanket cylinders 3, 4. That is, this straight line is not perpendicular to the moving direction of the belt-shaped image carrier T.

On each side wall of the illustrated printing device 1 of the offset rotary printing press, holes A, B for supporting these blankets for both blankets 3, 4 are provided.
Is provided. In these holes A and B, the barrel journals 6 and 7 of the blanket barrels 3 and 4 are respectively arranged in two eccentric liners, that is, eccentrically for the eccentrically perforated outer eccentric liner 8 and the barrel journal 6. Perforated inner eccentric liner 9
And an eccentrically perforated outer eccentric liner 10 and an eccentrically perforated inner eccentric liner 11 for the cylinder journal 7. The adjusting levers 12, 13, 14, 15 belong to the eccentric liners 8-11. The adjusting levers 12,14 for the inner eccentric liners 9,11 are connected to the pull rod 17, and the adjusting levers 13,15 for the outer eccentric liners 8,10 are connected to the pull rod 16. Furthermore, an adjusting device is connected to one eccentric liner pair, for example the lower eccentric liner pair, by means of which the pulling rod 1
The eccentric liners 10 and 11 are rotatable via 8 and 19. The movement of the pull rods 18, 19 and thus the rotation of the eccentric liners 10, 11 is carried out by means of an adjusting device having a swiveling lever 21 arranged on an adjusting spindle 20. The adjusting spindle 20 can be rotated by a motor or manually. For example, when the swivel lever 21 is rotated clockwise toward the position indicated by the reference numeral 21 ', the adjusting levers 12 to 15 move the positions 12', 13 ', 14', 15 'indicated by the chain line. As a result, the eccentric liners 8-11 can also be rotated accordingly. Adjustment lever 12 ~
15 and the pull rods 16 to 19 are designed such that all the eccentric bushes 8 to 11 can be rotated by the same amount when the adjusting spindle 20 is rotated, i.e. by the same angular position. This ensures that the inner eccentric liner 9 can be swung by the same angle as the outer eccentric liner 8, but in the opposite direction when approaching and separating. The same applies to the inner eccentric liner 11 and the outer eccentric liner 10. The pull rods 18, 19 can also act directly on the pull rods 16, 17.

Due to the advantageous construction of the adjusting levers 12 to 15 and the pulling rods 16 to 19 described above, by means of only one adjusting device 20,21, the outer plate cylinder 2,5 remains fixed and the inner rubber side 3 , 4 are simultaneously moved linearly from the common straight line G in the direction of the arrow P or P'and away from this straight line so as to be slightly away from each other, or in the direction of once approaching this straight line again. Can be made. Thereby, both blanket cylinders 3, 4 are moved to the left (FIG. 2) or to the right (FIG. 1), so that the inner blanket cylinders 3, 4 are mutually and
Separated from the plate cylinders 2,5. During this movement, the blanket cylinders 3, 4 are respectively separated from the outer plate cylinders 2, 5 and from each other. In the opposite movement, the inner rubber coppers 3 and 4 come into contact with each other. That is, both rubber copper are moved toward the straight line G, contact each other, and the outer plate copper 2
Or contact 5 as well. The switching device shown in FIGS. 1 and 2 is constructed in the same manner. Eccentric liner 8〜
Only 11 have 180 ° different positions. Although certainly not absolutely necessary, it is advantageous to support the outer plate cylinders 2, 5 eccentrically. In this way, for example, the inherent contact force between the outer plate cylinder 2 and the corresponding inner blanket cylinder 3 can also be adjusted to a desired degree or a desired crimping force.

Reference numerals 22 and 23 indicate the center points of the blanket cylinders 3 and 4 in the separated state, and reference numerals 24 and 25 indicate the center points of the blanket cylinders 3 and 4 in the contact state. At the same time, the reference numerals 24 and 25 indicate the center points of the holes A and B and the center points of the holes of the inner eccentric liners 9 and 11, respectively. The sign
26 ', 27', 26 ", 27" indicate the center points of the holes of the outer eccentric liners 8,10. As a whole, reference numerals 26 ', 26 ", 27', and 27" indicate that the above-mentioned center points of the inner blanket cylinders 3 and 4 are on the left side (Fig. 2) or the right side (Fig. 1) of the common straight line G. It indicates that it is located. By this, the inner blanket 3, 4
It is guaranteed that the blanket cylinders 3, 4 can be brought into contact with one another with the required force during movement in the direction of the arrow P (approaching direction). Advantageously, in the contact state, the center point of the blanket cylinder is as close as possible to the common straight line G, 24,2.
I want it to be in the position indicated by 5.

The magnitude of the contact force between the inner blanket cylinders 3 and 4 and between each blanket cylinder and the outer plate cylinders 2 and 5, respectively, depends on the tension rods 16, 17, 18, 19
A turnbuckle 28 having left and right threads disposed on the. The turnbuckle 28 allows the pull rods 16, 17, 18, 19 to be lengthened or shortened.

Additional Relationship Original Patent No. (Japanese Patent Application No. 60-71292)
Is a printing device for an offset rotary printing press,
Four printing device cylinders are arranged one above the other in a straight line inclined with respect to a strip-shaped image carrier that runs substantially horizontally,
The straight line passes through the center of at least two outer printer cylinders at least outside of the four printer cylinders, with a strip-shaped image carrier between both inner printer cylinders configured as blanket cylinders. With respect to the type in which the printing device cylinders are passable and can be moved in directions away from one another by means of an eccentric adjusting member, the cylinder barrels of the blanket cylinder are respectively fixed in holes in the printing device side wall. In addition, the eccentric liners are arranged on two inner and outer eccentric liners, the eccentric liners having the same eccentric distance, and the outer eccentric liner and the inner eccentric line, respectively. The liner is connected to one common pull rod, and the blanket cylinder is moved linearly in opposite directions at an angle of 90 ° to said straight line, at this time, the axial center of the barrel journal. Is the straight line Are always on different sides, and when the blanket cylinders are brought into contact, this eccentric liner has one of the eccentric liners so that it has the smallest distance from the axis and substantially coincides with the center of the hole. By means of the adjusting device, it is possible to rotate inwardly and outwardly in the hole in opposite directions and by the same angle via two separate pull rods respectively connected to one of the inner and outer eccentric liners. It was characterized by that.

On the other hand, the present invention relates to a printing apparatus for an offset rotary printing press, in which four printing apparatus cylinders are arranged one above the other in a straight line inclined with respect to a strip-shaped image carrier that runs substantially horizontally. The straight line passes through the center of at least two printing device cylinders outside of the four printing device cylinders, with a strip-shaped image carrier between both inner printing device cylinders configured as blanket cylinders. It is of a type which is passable and movable by means of an eccentric adjusting member in the direction in which the printing device cylinders move away from one another, and the gist of the invention is that the cylinder barrels of the blanket cylinders respectively Are arranged in two eccentric liners arranged inside and outside, which are fixed in the holes of the eccentric liners, which eccentric liners have the same eccentric distance, and each outer eccentric liner has a common pull rod. And, The side eccentric liners are connected to one common pull rod, and the blanket cylinders are each moved in the same direction linearly away from a straight line and slightly away from each other, at which time the cylinder journal The axis center of is always on the same side of the straight line, and when the blanket cylinder is brought into contact, the axis center has the smallest distance from the straight line and substantially coincides with the center of the hole, All eccentric liners are respectively connected to one inner and outer eccentric liner by one adjusting device.
It is possible to rotate inwardly and outwardly in the hole in opposite directions and by the same angle via two separate pull rods. Therefore, the present invention, which includes the essential parts essential to the constitution of the original invention, satisfies the additional requirement of Article 31 (1) of the Patent Act.

[Brief description of drawings]

1 and 2 are schematic views of the switching device according to the invention, with the central point of the blanket on two different sides of the inclined straight line. 1 …… printing device, 2 …… plate cylinder, 3,4 …… blanket cylinder, 5 ……
Plate cylinder, 6,7 …… Cylinder journal, 8,9,10,11 …… Eccentric liner, 12,13,14,15 …… Adjusting lever, 12 ′, 13 ′, 14 ′, 1
5 ′, 18 ′, 18 ′ …… Code, 16,17,18,19 …… Drawbar, 20
...... Swivel lever, 21 …… Adjustment spindle, 21 ′ …… Code, 22,23,24,25,26 ′, 26 ″, 27 ′, 27 ″ …… Center point, 28
...... Turnbuckle

Claims (4)

[Claims] 1. A printing device for an offset rotary printing press, comprising four printing device cylinders arranged one above the other in a straight line inclined with respect to a strip-shaped image carrier running substantially horizontally. , The straight line passing through the center of at least two printing device cylinders on the outside of the four printing device cylinders, the strip-shaped image carrier being able to pass between both inner printing device cylinders configured as blanket cylinders In the type in which the printing device cylinders can move in directions away from each other by an eccentric adjusting member, the cylinder journals (6, 7) of the blanket cylinders (3, 4)
Are fixed inside the holes (A, B) of the side wall (1) of the printer, respectively, and two eccentric liners (8, 9;
10 and 11), and this eccentric liner (8,9; 10,1)
1) have the same eccentric distance, the outer eccentric liners (8, 10) are on one common pull rod (16), and the inner eccentric liners (9, 11) are on one common. Is connected to the pull rod (17) of the blanket, and the blanket cylinders (3, 4) move in the same direction (P, P ′) so as to move linearly away from the straight line (G) and slightly away from each other. At this time, the shaft center (24, 25) of the barrel journal (6, 7) is always on the same side of the straight line (G), and this shaft center (24 , 25) has the smallest distance from the straight line (G) and the hole (A,
All the eccentric liners (8,9; 10,11) are connected to one inner and outer eccentric liner (10,11) by one adjusting device (20,21) so that they are almost coincident with the center of B). Offset, characterized in that it is possible to rotate inwardly and outwardly in the hole in opposite directions and by the same angle via two separate pulling rods (18, 19) connected to each other. Printing equipment for rotary printing presses. 2. The adjusting device comprises an adjusting spindle (20), which adjusting spindle (20) comprises a pull rod (18,1).
Is located on the swivel lever (21) connected to 9),
The printing apparatus according to claim 1. 3. The pull rods (16,17) at their ends are respectively connected to adjusting levers (12,13; 14,15) arranged on eccentric liners (8,9; 10,11). The printing apparatus according to claim 1 or 2, which is provided. 4. The pull bar (16,17; 18,19) has a turnbuckle (28) with left and right threads to adjust its length. The printing apparatus according to any one of the ranges 1 to 3.