JP2994283B2 - Adjustment devices for printing device cylinders - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an adjusting device for a cylinder in a printing device of a printing press, particularly for a blanket cylinder or a plate cylinder in a printing device or a varnishing device of a sheet offset printing press, The cylinders are mounted at their two ends on one side in an adjustable manner with respect to the other cylinder via eccentric bearings which are rotatably arranged in the lateral frame of the printing device. The present invention relates to a type in which an operating device acting in common on a bearing is provided for simultaneously rotating the bearings at both ends.

[0002]

2. Description of the Prior Art The blanket cylinder in the printing device of a sheet offset printing press is positioned relative to an impression cylinder and a plate cylinder which cooperate with these blanket cylinders via eccentric bearings which are rotatable in side frames. Adjustably mounted. By rotating the eccentric bearing, the blanket cylinder can be pressed and separated from the impression cylinder that guides the sheet and the plate cylinder that cooperates with the blanket cylinder. In this case, a so-called two-stage switching mechanism cooperates with the eccentric bearing as an operating device, so that the blanket cylinder is separated from the impression cylinder in the first switching stage, but is still pressed against the plate cylinder, In the first stage, the blanket cylinder is separated from the impression cylinder and the plate cylinder.

Further, an adjusting mechanism belonging to the switching mechanism and performing an adjustment relating to the thickness of the sheet to be printed as another operating device is connected rearward or in series, and both adjusting devices are connected by this adjusting mechanism. It is known that the eccentric bearing is turned by the same angle, so that the axis of the blanket cylinder is adjusted parallel to the impression cylinder which guides the sheet. Also provided is an adjusting mechanism belonging to each eccentric bearing and fixedly supported on the side frame, and by simultaneously adjusting the positions of both adjusting mechanisms, the cylinder is parallel to the cylinder associated therewith, and It is also known to be able to adjust the position to a tilted state. Such adjusting mechanisms are used in particular in plate cylinders of offset printing presses. As a result, the plate cylinder can be pressed against the blanket cylinder in such a manner that a uniform line printing is performed over the entire plate width.

However, providing one adjusting mechanism for each of the eccentric bearings of the position-adjustable cylinder has the following disadvantages. That is, both adjusting mechanisms are used when the cylinder is adjusted parallel to the cylinder with which it is associated (for example the plate cylinder relative to the blanket cylinder or the plate cylinder in the varnishing device relative to the impression cylinder). Must be adjusted to the same value, either simultaneously or sequentially. Advantages in this case include the following. This means that the cylinder can be adjusted in a very wide range on one side (in an inclined position) with respect to the associated cylinder. In a varnishing device connected to the back of the printing device of a sheet offset printing press, a cylinder having a blanket in the form of a rubber blanket or letterpress cooperates with the impression cylinder. In, corresponding adjustments are made due to the thickness tolerances of the printed sheet over the width of the plate, due to the large tolerances of the relief plate serving as the plate, and because of the variation in the compressibility of the printed sheet. To obtain a uniform printing result or varnishing result over the entire plate width. However, in a manner as described above, the cylinder which is supported in a position-adjustable manner via an adjusting mechanism which is respectively associated with the eccentric bearing is inclined by a predetermined value with respect to the axis of the cylinder associated therewith. The eccentric bearings can be damaged when the position is adjusted, especially at high working speeds. The reason for this is that the eccentric bearing, which supports the cylinder via its bearing pins, only allows a certain inclination of the bearing pins with respect to it. For this purpose, in each adjusting mechanism which is assigned to each end of the cylinder and adjusts the cylinder in a wide range parallel to the cylinder which cooperates with it, additional measures are taken to achieve the There must be no significant differences between the adjustment values.

[0005] DE 91 04 151 describes a device for adjusting the axial distance between a blanket cylinder and a printing cylinder of a sheet offset printing press, in which case a central control stand is used for the printing press. Via a sliding rod which can be moved along with the eccentric bearing pairs of the respective blanket cylinder. In order to rotate the eccentric bearings of one blanket cylinder together, the two eccentric bearings are connected to one another via offset shafts. In this case, the connection of the sliding rod to the two eccentric bearings takes place via an intermediate adjusting mechanism, whereby the eccentric bearing is adjustable with respect to the longitudinally movable sliding rod. is there. Furthermore, in this case, one switching mechanism is provided for each blanket cylinder, and this switching mechanism is configured in the form of a toggle lever transmission mechanism, and the blanket cylinder is connected to the impression cylinder and the plate cylinder by two. It can be pressed and separated in stages. By means of a central control stand and a sliding rod, the blanket cylinders in the individual printing units can be adjusted together to one value, so that a certain distance between the axes of the blanket cylinders is achieved (thickness of the sheet to be printed). Adjustment).

[0006] DE 40 13 075 C1 describes a device for crimping and separating a blanket cylinder in a printing device of a sheet offset printing press. In this case, the two pneumatic cylinders act on the toggle lever transmission mechanism via the connecting member and on the offset shaft connecting the two eccentric bearings supporting the blanket cylinder to one another. In addition to the toggle lever transmission, a printing sheet thickness adjusting mechanism is provided, by means of which the blanket cylinder can be adjusted relative to the impression cylinder in accordance with the thickness of the printing sheet. Both the printing sheet thickness adjusting mechanism and the pneumatic cylinder act on the offset shaft, which rotates both eccentric bearings by the same angle, so that depending on the crimping and separating device, the blanket cylinder is parallel to the impression cylinder. You can only adjust the position. In this case, there is no more pressing of the blanket cylinder against the impression cylinder on one side.

[0007]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to eliminate the disadvantages of the prior art mentioned above, in particular during the operation of a printing press, by moving the printing device cylinder to the cylinder associated therewith. The distance between the axes can be adjusted in parallel as well as on one side (in an inclined state). In particular, it is ensured that the axis of the cylinder, whose position is adjusted by the adjusting mechanism, is not tilted too far with respect to the associated cylinder.

[0008]

In order to solve this problem, the present invention provides an adjusting device of the type described above in which an eccentric bearing and an operating common to both eccentric bearings are provided.
Between the device and the device there is provided an adjusting device which can be adjusted by means of a position adjusting drive fixed on the side frame, by means of which one eccentric bearing can rotate relative to the other eccentric bearing. It was made to be.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a preferred embodiment of the present invention;

The adjusting device according to the invention can be applied to blanket cylinders and plate cylinders of offset printing presses, and also to plate cylinders of varnishing devices and other finishing devices. In this case, the operating device acting on both eccentric bearings is an adjusting mechanism that can be adjusted manually or by motor to adjust the thickness of the sheet to be printed, a single-stage or multi-stage switching mechanism for pressing and separating the cylinders Or the adjusting mechanism and the switching mechanism connected in series to each other. It is important in this case that an adjusting device is provided between the operating device acting on both eccentric bearings and one of the eccentric bearings, by means of which one eccentric bearing is moved relative to the other eccentric bearing. Is rotated by a predetermined angle,
The axis of the cylinder of the printing press is to be tilted relative to the axis of the cylinder with which it is associated. In this case, the adjusting range of the adjusting device between the operating device and one of the eccentric bearings is
The bearing pins of the torso are adapted to the maximum possible inclination angle inside the eccentric bearings which support them.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be specifically described below based on embodiments shown in the drawings.

In FIG. 4, the cylinders 14 whose position is adjusted with respect to the cylinders 15 are supported by eccentric bearings 1 each receiving one bearing pin 2. Therefore, by rotating the two eccentric bearings 1 at the same angle or at different angles, the axis of the cylinder 14 is adjusted to be parallel or inclined with respect to the axis of the cylinder 15. Bearings for receiving the bearing pins of the cylinder 15 cooperating with the cylinder 14 are not shown. The bearings of both cylinders 14 and 15 are mounted in side frames (not shown) of the printing or varnishing device.

FIG. 5 shows, in principle, an operating device which acts in common on both eccentric bearings 1 of the cylinder 14. In the embodiment shown, this operating device comprises a switching mechanism, a printing sheet thickness adjusting mechanism and Consists of Even in this case,
The bearing pins 2, not shown, of the shell 14 are each supported by an eccentric bearing 1 which is rotatable in a side frame. The two eccentric bearings 1 of the shell 14 are each connected via one connecting member 3 to the pivotable end of a lever 4 mounted on each end of the offset shaft 5.
The operation device portion shown in FIG. 5 is, for example, the one located on the B side of the printing press. The offset shaft 5 extending between the side frames of the printing press from side A to side B has a lever 6 in addition to the lever 4, the pivotable end of which is the piston of the working cylinder 8. It is connected to a rod 7. By supplying a pressure medium (pressure air / pressure oil) to one or the other of the working chambers of the working cylinder 8,
The lever 6 attached to the B side of the shift shaft 5 is caused to pivot, and the pivot shaft 5 is rotated by the pivotal movement, so that both the eccentric bearings 1 are connected via the connecting member 3 on the A side and the B side. It is turned.

The switching mechanism shown in FIG. 5 therefore comprises a working cylinder 8 and a piston rod 7 operated by a pressure medium. The fulcrum of the working cylinder 8 is the lever 9
This lever 9 is pivotable about an axis fixed to the side frame. Lever 9 is lever 1
The levers 9 and 10 form a two-armed V-shaped lever, which are integrally connected to the lever. A spindle nut 11 is connected to an end of the lever 10. The spindle nut 11 is screwed onto a screw spindle 12, which can be operated by an adjusting drive 13. The adjusting drive 13 is in this case either remotely controlled by a motor or manually operated by an adjusting gauge. Via the adjusting drive 13, the eccentric bearings are adjusted on the sides A and B, respectively, in relation to the thickness of the sheet to be printed, and as shown in the upper part of FIG. Are adjusted in parallel with each other. By supplying a pressure medium to one or the other working chamber of the working cylinder 8 and moving the piston rod 7 in and out, the eccentric bearings 1 on the A and B sides are rotated by the same angle, and the cylinders 14 and 15 are rotated. They are pressed and separated from each other. The working cylinder 8 can be configured as a so-called two-stage working cylinder. In the embodiment shown, the arrangement of FIG. 5 is a switching mechanism and a printing sheet thickness adjusting mechanism, which are connected to the end of the offset shaft 5 on the B side of the printing press.

FIGS. 1 and 2 show the end of the offset shaft 5 on the opposite side A of the printing press. In this case, the lever 1 acting on the eccentric bearing 1 via the connecting member 3 on the A side
6 is supported on the shift shaft 5 so as to be relatively rotatable. A driver 17 is provided in association with a lever 16 which is relatively rotatable on the shift shaft 5, and the driver 17 is configured in a lever shape and is attached to the shift shaft 5 so as to be relatively non-rotatable. Have been.

A worm gear 18 is rotatably supported in a lever-shaped driver 17, and the axis of the worm gear 18 is parallel to the shift shaft 5.
The worm gear 18 meshes with a worm 19, which is also mounted in the driver 17 and is prevented from moving in the axial direction.
It is rotatable by a position adjustment driving device 22 fixed to the side frame via the telescope shaft 21 and the telescope shaft 21. In this case, the position adjustment drive 22 can be configured to be manually operated by an adjustment gauge or to be remotely controllable by a motor.

The worm gear 18, which is inserted into the entrainer 17 and meshes with the worm 19, has on its side facing the lever 16 a pin 23 eccentrically arranged with respect to the axis of the worm gear 18. The pin is rotatably inserted into the hole of the slider 24. Slider 24 is lever 16
Is movably inserted into a groove 25 formed in the groove. Lever 16 rotatably supported on shift shaft 5
The inner slide 24 and groove 25 thus cooperate with one another in the form of a linear movement mechanism. By rotating the worm 19 in one or the other direction and rotating the worm gear 18 by a predetermined angle in one or the other direction, the lever 1
6 is pivoted about the offset shaft 5 via a pin 23 and a slide 24, and this pivoting movement is
To the eccentric bearing 1 on the side. 1 and 2
The eccentric bearing 1 A side of the printing machine shown is only possible rotation a predetermined angle with respect to the eccentric bearing of the B side (Fig. 5), whereby cylinder 14, as shown in the lower part of FIG. 4, cylinder It is tilted with respect to a cylinder 15 which cooperates with 14. in this case,
The adjustment range of the position adjustment drive and thus the amount of rotation of the lever 16 with respect to the follower 17 on the offset shaft 5 are determined such that the cylinder 14 is inclined with respect to the cylinder 15 by a predetermined maximum angle.

In FIGS. 1 and 2, the eccentric bearing 1 on the side A is a driven body 1 fixed to a lever 16 and a shift shaft 5.
7 together with the crimping position and the separation position. In this case, FIG. 1 shows the crimping position. The telescope axis 21 is
This makes it possible to change the interval between the swivel joints 20 when performing this swiveling motion.

[0019]

According to the present invention, the printing device cylinder cooperating with another cylinder can be arranged in parallel with the other cylinder.
In addition, it can be adjusted to the tilted state on one side, in which case,
Both the parallel and the tilt position adjustment of the cylinder axis can be performed during the operation of the printing press.

[Brief description of the drawings]

FIG. 1 is a view showing an adjusting mechanism according to the present invention in a crimping position.

FIG. 2 is a view showing an adjustment mechanism according to the present invention at a separated position.

FIG. 3 shows a lever pivotally supported on a release shaft and having a slide movable longitudinally in a groove.

FIG. 4 is a view showing a bearing device of a trunk and an adjustment state.

FIG. 5 is a diagram showing an adjusting mechanism and a switching mechanism connected to each other back and forth.

[Explanation of symbols]

1 eccentric bearing, 2 bearing pin, 3 connecting member,
4 lever, 5 shift shaft, 6 lever, 7 piston rod, 8 working cylinder, 9 and 10 lever, 11 spindle nut, 12 screw spindle, 13 adjusting drive, 14 and 15 barrel, 1
6 lever, 17 driver, 18 worm gear,
19 worm, 20 swivel joint, 21 telescope axis, 22 position adjusting drive, 23 pin,
24 slides, 25 grooves

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Ulrich Jung, Germany Limburg Franc Kfurter Straße 65 a. (JP, A) JP-A 61-180730 (JP, U) JP 4-43322 (JP, Y2) (58) Field surveyed (Int. Cl. ⁶ , DB name) B41F 13/12-13 / 14 B41F 13/24-13/40 B41F 23/08

Claims (7)

(57) [Claims] 1. An adjusting device for a cylinder in a printing device of a printing press, in particular for a blanket cylinder or a plate cylinder in a printing device or a varnishing device of a sheet offset printing press, the cylinders being at each end. It is supported in an adjustable manner with respect to another cylinder via one eccentric bearing rotatably arranged in the side frame of the printing device and is common to the eccentric bearings at both ends. Of the type in which the operating device acting is provided for simultaneously rotating the bearings at both ends, one eccentric bearing (1) and both eccentric shafts
Adjustment devices (16 to 19) are provided between the receiving device (5 to 13) common to the receivers and can be adjusted by a position adjustment drive (22) fixed to the side frame. An adjusting device for a printing device cylinder, characterized in that one eccentric bearing (1) is rotatable relative to the other eccentric bearing (1). 2. An operating device (5-13) for connecting eccentric bearings (1) at both ends of a cylinder (14) to each other and extending between two side frames of a printing device. )
2. The adjusting device according to claim 1, wherein the adjusting device is arranged at one end of the offset shaft. 3. A shift shaft (5) at the other end,
It is connected to the eccentric bearing (1) at the other end of the barrel (14) via a lever (4) and a connecting member (3) which are non-rotatably connected to the shift shaft (5), and is shifted. The shaft (5) has at one end a lever (16) rotatably supported relative to the offset shaft (5) and a connecting member (3) to one of the barrels (14). It is connected to the end eccentric bearing (1), and the lever (16)
The follower (1) non-rotatably connected to the shift shaft (5)
3. The adjusting device according to claim 2, wherein the adjusting device is rotatable relative to (7). 4. A worm (19) in a follower (17).
A worm gear (18) having an eccentric pin on the side facing the lever (16) which is rotatably supported relative to the offset shaft (5). 2. The eccentric pin of claim 1, wherein said eccentric pin is engaged in a hole of a slide (24) movable in a groove (25) of the lever (16). 3. The adjusting device according to 3. 5. The adjusting device according to claim 1, wherein the adjusting device is connected via a cardan shaft to a position adjusting drive fixed to the side frame. 5. The adjusting device according to any one of 1 to 4. 6. An adjusting mechanism (5) for adjusting a cylinder (14) with respect to a cylinder (15) cooperating with said cylinder (14) in relation to the thickness of a sheet to be printed by a control device (5-13). 11-13)
And a torso (15) which cooperates with the torso (14).
The adjusting device according to any one of claims 1 to 5, further comprising a switching mechanism (7, 8) that presses and separates the pressing device from the device. 7. The adjusting range of the position adjusting drive (22) is determined by adjusting the adjusting range of the cylinder (14).
7. The method according to claim 1, wherein the control unit is set in accordance with the maximum amount of tilt adjustment relative to (5).
Adjustment device according to paragraph.