EP0826501B1 - Device for adjusting an inking or damping roller in a printing machine - Google Patents

Description

The present invention relates to a device for Setting an inking or dampening roller of a printing press with respect two adjacent fixed rollers according to the preamble of claim 1.

In printing machines, especially in high-speed web-fed rotary printing machines has been found to be beneficial if the inking and dampening unit rollers are adjustable, that is, that the contact pressure on the adjacent rollers with which the adjustable Rolls come into contact, also adaptable during production is. These adjustable inking and dampening rollers are soft elastic surface. This can result in fixed rollers the contact pressure to the neighboring rollers with which it is in contact, to change. The main reason for this is the changing conditions of Machine standstill, in which the contact pressure in a known manner by making an impression, for example, of the application roller on the Plate cylinder is adjustable up to full production speed. Each the higher the speed, the greater the contact pressure.

It can have an influence on the contact pressure of the rollers mentioned also have the temperature at the start of production from room temperature will rise to a certain operating temperature, which is also a Increases the contact pressure.

All these changes in the contact pressure between the corresponding Rollers can negatively affect print quality impact.

Such as studies regarding the rolling behavior of multi-roll systems with the inclusion of viscoelastic rollers therefore the adjustment of the contact pressure to the machine speed particularly desirable because otherwise the torque required to drive it the rollers rise massively. By optimally adjusting the rollers, you can energy can also be saved.

Such devices for setting inking or Dampening rollers are known. For example, DE-A-38 25 517 shows such a device. Here are adjustable in each bearing arrangement Roller, in each of which a journal of this roller is mounted, two adjustment devices housed, which are substantially perpendicular to each other stand and with which the bearing arrangement with respect to the machine frame adjusted in any direction of a plane within the setting range can be.

With this device you have all options, the corresponding adjustable roller in the desired position. It has but showed that the manufacture of this device is very complex and consequently also expensive and that the space required is considerable, so that an application is not possible in all machines.

An object of the present invention is now that To design the device such that an adjustment of the corresponding Rolling in the desired manner is possible to make the device easier in construction and correspondingly cheaper to manufacture, and that the device is installed in a printing press even in tight spaces can be.

According to the invention, this object is achieved by the in the marking of claim 1 specified features.

By using only one linear actuator and one control surface the device according to the invention can be constructed in a simple and space-saving manner his. There is advantageously only one control surface per bearing arrangement provided, the guide part and control surface by means of an elastic Elements are pressed against each other, resulting in a play-free guidance of the bearing arrangement guaranteed.

Another object of the present invention is to design them in such a way that in addition to adjusting the corresponding roller it is also possible to park one of the adjacent rollers, whereby the parked roller remains in contact with the other neighboring roller Roller.

According to the invention this object is achieved by the dependent claim 3 attached features.

With this configuration, one can be turned off in a simple manner Application roller can be reached from the plate cylinder without additional Drives are required, whereby the device according to the invention nevertheless has a simple structure. In particular, a parked Roll in a reproducible manner back into the two rollers position to be brought.

An advantageous embodiment of the invention is that each bearing assembly is attached to a support member which is in a bracket is held. The connection between bracket and supporting part is made by a Swivel lever which is pivotally held in the holder and on which the supporting part is pivoted. This allows the support part in easier Way to follow the control curve when the support member relative to the bracket and moved along one of the axes to adjust the roller. Advantageously, only one pivot lever is used, the support part must be provided on the side with support means, and that only the first axis, which is rotatably and non-displaceably held in the supporting part, in the middle Area is equipped with a thread, which in a corresponding Counter thread is screwed into the swivel lever so that by twisting this axis by means of a motor and a gearbox together this axis can be moved with the support part.

By using a swivel lever, the control cam have a virtually any shape so that when they are on a part is attached, which is releasably and interchangeably attached to the support member in their shape can be adapted to the desired requirements. In the guide part with respect to the holder is advantageous it is attached, adjustable so that when the roller is inserted into the bearing arrangements the ratio of the contact pressure to the two neighboring ones Rollers are changeable and adaptable to the existing needs.

Advantageously, the roller is adjusted automatically via a control device, depending on selectable parameters. Thereby you always get an optimal one while the press is operating Position of the roller.

Advantageously, a control value transmitter for determining the current position of the roller provided to the control device can be reported.

The control device can be adjusted by driving the motor also as a function of one measured by means of a force measuring device Applying pressure of the roller to the adjacent rollers.

Embodiments of the present invention are as follows explained in more detail by way of example with reference to the accompanying drawing.

Fig. 1 in schematischer Darstellung ein erstes Ausführungsprinzip der erfindungsgemässen Vorrichtung;

Fig. 2 in schematischer Darstellung ein zweites Ausführungsprinzip der erfindungsgemässen Vorrichtung;

Fig. 3 in räumlicher und zum Teil geschnittener Darstellung eine Ausführungsform der erfindungsgemässen Vorrichtung nach dem Prinzip gemäss Fig. 2;

Fig. 4 eine Schnittdarstellung durch die erfindungsgemässe Vorrichtung gemäss Fig. 3, wobei die Schnittebene im wesentlichen durch die erste Achse und die zweite Achse gelegt ist;

Fig. 5 eine Schnittdarstellung der erfindungsgemässen Vorrichtung gemäss Fig. 3, wobei die Schnittebene in den Bereich der federnden Abstützung des Tragteils und der Steuerfläche gelegt ist;

Fig. 6 eine Schnittdarstellung der erfindungsgemässen Vorrichtung entlang Linie VI-VI gemäss Fig. 4;

Fig. 7 eine Detailansicht der Steuerkurve und des mit dieser zusammenwirkenden Führungsteils, zum Teil geschnitten; und

Fig. 8 ein Blockschema einer Ausführungsvariante einer elektrischen Steuerung für die erfindungsgemässe Vorrichtung.

It shows:

1 shows a schematic representation of a first embodiment principle of the device according to the invention;

2 shows a schematic representation of a second embodiment principle of the device according to the invention;

3 shows a spatial and partially sectioned illustration of an embodiment of the device according to the invention based on the principle according to FIG. 2;

FIG. 4 shows a sectional view through the device according to the invention according to FIG. 3, the sectional plane being essentially through the first axis and the second axis;

5 shows a sectional illustration of the device according to the invention according to FIG. 3, the sectional plane being placed in the region of the resilient support of the supporting part and the control surface;

6 shows a sectional illustration of the device according to the invention along line VI-VI according to FIG. 4;

7 shows a detailed view of the control cam and the guide part interacting with it, partly in section; and

8 shows a block diagram of an embodiment variant of an electrical control for the device according to the invention.

Fig. 1 shows a schematic representation of a plate cylinder 1 not shown printing machine and a friction roller 2. Between the Plate cylinder 1 and the friction roller 2, an application roller 3 is arranged, which is held on both sides in a device 4 according to the invention. This device 4 consists essentially of a pivot lever 5, the is pivotally mounted about the axis of the friction roller 2. At this swivel lever 5, a guide lever 6 is arranged pivotable about the axis 7. At the The end of the guide lever 6 facing away from the axis 7 is a guide part 8 attached. The guide lever 6 and thus the guide part 8 are by means of a spring 9 pressed against a control surface 10, which with respect to the machine frame the printing machine, not shown, stationary and in known Way is held.

The application roller 3 is rotatable about the axis 11 in the guide lever 6 stored. Via a linear drive 12, which with the swivel lever 5 in The device 4 can be operatively connected about the axis of the friction roller 2 swivel. When pivoting the pivot lever 5 by this linear drive 12 runs the guide part 8 along the control surface 10, whereby the in this guide lever 6 mounted application roller 3 essentially on a Straight line 13 is moved, which runs parallel to the control surface 10. By Moving the application roller 3 can thus more or less against the plate cylinder 1 and the friction roller 2 are pressed.

Ideally, the control surface 10 is aligned so that the parallel straight line 13 essentially the bisector of the Corresponds to angle α, which is formed by two connecting lines, each the axis 11 of the application roller 3 with the axis of the plate cylinder 1 or connect the axis of the friction roller 2.

It is easily conceivable that the control surface 10 is opposite the bisector of the angle α is inclined by a certain amount, whereby when moving the application roller 3 to the contact pressure Plate cylinder 1 and the application roller 2 no longer correspond to each other be changed, but in a certain ratio by the inclination the control surface 10 is fixed.

The setting of the application roller 3 with respect to the plate cylinder 1 and the friction roller 2 takes place along an adjustment range 14 of the control surface 10. The control surface 10 has a adjoining the adjustment area 14 further area 15, which is inclined towards the friction roller 2. If now the adjustment of the application roller 3 from the plate cylinder 1 and the friction roller 2 takes place, the guide part 8 comes from the adjustment range 14 of the control surface 10 in the further area 15, the guide lever 6 pulled against the friction roller 2 by the spring 9, the application roller 3 is thus turned off by the plate cylinder 1 and is only in contact with the Rubbing roller 2. The contact pressure of the applicator roller 3 becomes the rubbing roller 2 determined by the force of the spring 9. In a known manner can be parked Condition of the application roller 3 from the plate cylinder 1, for example the inking unit be pre-inked on the press.

The principle works in a similar manner, as is shown schematically in FIG. 2 is shown. The application roller 3, which with respect to the plate cylinder 1 and the friction roller 2 is to be adjusted, is in a sliding part 16 stored, which is displaceable in a receiving part 17 via a linear drive 18 is held. The receiving part 17 in turn is displaceable in a guide 19 guided. The sliding part 16 is equipped with a guide part 8, which cooperates with a control surface 10. Over pressure of the spring 20 the guide part 8 is pressed against the control surface 10. The control surface According to the principle according to FIG. 1, 10 is essentially parallel to the bisector 13 aligned. When moving the sliding part 16 by the linear drive 18, the friction roller 2 follows the bisector 13, according to the process as described for FIG. 1. Here, too, the control surface 10 has an adjustment area 14 and another Area 15 on so that the same setting options and the parking the application roller 3 can be carried out as this with the system 1 is possible.

It is also conceivable for the control surface 10 to run parallel to it To provide control surface, whereby the guide part 8 through these two Control surfaces would be forced. This could affect the elastic Element to be dispensed with, the parking of the application roller 3 and in particular the contact pressure on the friction roller 2 could then be via the linear drive 12 or 18 set by driving into a corresponding position become.

As can be seen from Fig. 3, the journal 21 is that not shown Applicator roller in a bearing arrangement consisting of two halves 22 stored, whereby the replacement of an application roller in a known Wise and easy to do. This bearing arrangement 22 is on one Support part 23 fastened by means of screws 24, which has the shape of a table. This support part 23 is on its facing away from the bearing assembly 22 Side equipped with two tabs 25 in which a first axis 26 rotatable but is fixed against displacement. Is pivotable about this first axis 26 one end of a pivot lever 27 articulated.

The other end of the pivot lever 27 is about a second axis 28, which is aligned parallel to the first axis 27, pivotable and fixed stored in a holder 29. This bracket 29 is not shown Machine frame attached to the printing press.

The first axis 26 has a thread 30 in its central region on, which in a corresponding counter thread 31, arranged in Swivel lever 27 is screwed in. On the first axis 26 there is also a Gear pinion 32 fixed in a torsionally rigid manner. With this gear pinion 32 meshes Gear 33, which is fixed on the output shaft 34 of a gear 35. This Gear 35 is flanged onto an electric motor 36. The electric motor 36 and consequently the gear 35 with gear 33 are on the pivot lever 27 attached. By rotating the first axis 26, this causes the counter thread 31 screwed thread 30 a displacement of the first axis 26 in their longitudinal direction, which has the consequence that the support member 23 accordingly is moved.

To prevent the support part 23 from tipping over the first axis 26 can, this is equipped with support means 37, which in the form of Rollers 38 are formed on the two edge regions of the support part are attached and essentially on the corresponding runways of the Support part 23 and the bracket 29 can roll.

A component 39 is fastened on the supporting part 23, on which the control surface 40 is attached, corresponding to the control surface 10 according to FIG. 1 and 2. This control surface 40 interacts with a guide part 41 which is fastened to the holder 29 and the guide part 8 according to FIGS. 1 and 2 corresponds. This control surface 40 also has an adjustment range and another area for placing the application roller on, like this to the 1 and 2 has been described.

A mounted between bracket 29 and pivot lever 27 elastic element 42, which is designed as a compression spring, causes the Support part 23 and thus the control surface 40 pressed against the guide part 41 become.

During the displacement of the support part 23 to the pivot lever 27 the control surface 40 follows the guide part 41. Here is the setting range the control surface 40 is aligned essentially parallel to the bisector 13, as has been described for FIG. 2. While moving of the support member 23, triggered by turning the first axis 26, makes the pivot lever 27, caused by the control surface 40, in particular when it comes to parking the friction roller, a swiveling movement. Around a bracing of the support member 23 on the bracket 29 on which the support member 23 is supported by the support means 37, between the Support means 37, which are attached to an edge region of the supporting part 23, and the support member 23 a plate spring 43 is used. This can make minor Deflections of the support member 23 to the bracket 29 are recorded. To the position of the support member 23 with respect to the pivot lever 27 and consequently to be able to determine the holder 29 is on the pivot lever 27 a control value sensor 44 is attached, which is electrical with a control device is connected, as will be described later.

Fig. 4 shows the bearing assembly 22, which is fixed on the support member 23 is. As already mentioned, the first axis 26 is rotatable but non-displaceable in FIG the two tabs 25 of the support member 23 mounted. When twisting this first Axis 26 moves this with respect to the pivot lever 27 and takes the support member 23. The gear pinion 32 consequently shifts also with respect to the gear 33, which is why it is a correspondingly large Width.

The second axis 28, which is held in the holder 29, and around which pivot lever 27 is pivotable can be measured with a force measuring device 45, which consist for example of a load cell 46 can, which is inserted in the pivot lever 27 and the storage of second axis 28 takes. This load cell 26 is with a control device electrically connected, as will be described later.

The bracket 29 is on the machine frame 53 of the printing press attached.

5 shows a view of the rollers forming the support means 37 38, which are provided on an edge region of the support part 23. The rollers 38 are supported on the one hand essentially directly on the supporting part 23, act on the opposite side but on the plate spring 43, which on the bracket 29 is placed and a slight movement of the support member 23 to the bracket 29 permits.

In Fig. 6 is again the bearing assembly attached to the support member 23 22 can be seen, as well as the support means 37, through which the support member 23 on the Bracket 29 is supported. In particular, the pivoting is in this figure of the pivot lever 27 about the second axis 28. Through the Compression spring 42 is the pivot lever 27 and with this the support member 23 the control surface 40 (FIG. 3) pressed against the guide part 41 (FIG. 3).

Fig. 7 shows the guide part 41, which is attached to the bracket 29 and the control surface 40, which is provided in component 39, which component 39 is attached to the support member 23. The guide part 41 is adjustable Eccentric 54 attached, as can also be seen in FIG. 5. This eccentric 54 can, for example, when assembling this device according to the invention can be set, for example, the contact pressure of the application roller 3 for plate cylinder 1 can be chosen larger than the contact pressure the application roller 3 to the friction roller 2.

As already mentioned, the component 39 in which the control surface 40 is attached to be replaced, by appropriate Choice of the shape of the control surface, the ratio of the contact pressure, for example the application roller / friction roller for contact pressure application roller / plate cylinder can be influenced.

For setting and stopping the application roller 3, for example a control device 47 is provided with respect to the friction roller and plate cylinder, as shown schematically in Fig. 8. This can, for example be a programmable logic controller 48 with which the target position the application roller 3 is specified. The actual position of the application roller 3 is by the actuating value transmitter 44 to the programmable logic controller 48 reported back. By driving the motors 36, the application roller becomes corresponding set. To determine the target value of the respective roller position The programmable logic controller 48 can also provide information are transmitted by the machine control 49, for example via Speed, running time, on and off etc.

It is also possible to use other actual values, for example the one about the Force measuring device 45 determined contact pressure or other values directly can be determined on the machine by means of measuring probes 50, in the programmable logic controller Enter controller 48. The roller diameter can also be used here the adjustable roller can be entered based on this the position of the roller is adjusted accordingly.

The stored setpoints and the actual values about the position of the adjustable ones Rolls as well as other usable influencing factors that one Can affect the position of the adjustable roller can a display 51 of the programmable controller 48 is shown and can be checked, but they can also be controlled in the control device 47 attached keyboard 52 can be changed.

This device according to the invention is used in an optimal manner an adjustment of the corresponding rollers with respect to two neighboring ones Rolling allows, the structure of this device can be kept simple can, and the setting can be carried out automatically controlled, depending the machine parameters to be taken into account.

Claims (15)

1. Apparatus for adjusting an inking- or dampening-device roller (3) of a printing machine relative to two adjacent, fixed rollers (1; 2) rotatingly mounted in a machine frame (53) of the printing machine, in which each of the two ends of the spindle of the inking- or dampening-device roller (3) is rotatingly mounted in a bearing arrangement (22) which are displaceable via drive means relative to the machine frame (53) in a plane perpendicular to said spindle, characterised in that the displacement of each of the two bearing arrangements (22) takes place in each case along at least one control surface (10; 40) cooperating with a guide part (8; 41), which control surface has at least one adjustment zone (14) that runs substantially parallel to an angle bisector (13) of an angle (α), which angle (α) is formed by two connection lines which in each case connect the axis of the inking- or dampening-device roller (3) to respective axis of the adjacent rollers (1; 2), and that the drive means for displacement of the bearing arrangement (22) consist in each case of a single linear drive (12; 18).
2. Apparatus according to claim 1, characterised in that for each bearing arrangement (22) a control surface (10; 40) is provided, and that the guide part (8; 41) and the control surface (10; 40) are pressed against one another by means of a resilient element (9; 42).
3. Apparatus according to claim 2, characterised in that the inking- or dampening-device roller is an inking roller (3) disposed between a distributor roller (2) and a plate cylinder (1), that the control surface (10; 40) is disposed in such a way that the pressing force exerted by the resilient element (9; 42) is directed toward the distributor roller (2), and the control surface (10; 40) has a further zone (15) adjoining the adjustment zone (14), which further zone is inclined toward the distributor roller (2) so that the inking roller (3), upon displacement into this further zone (15), is supported by the pressing force exerted on the distributor roller (2) by the resilient element (9; 42), a space is created between control surface (10; 40) and guide part (8; 41), and the inking roller (3) is disengaged from the plate cylinder.
4. Apparatus according to one of the claims 1 to 3, characterised in that each bearing arrangement (22) is secured on a support part (23) held in a mount (29) which is firmly connected to the machine frame (53) and with respect to which the support part (23) is displaceable along the control surface (40), the control surface (40) being disposed on the support part (23), and the guide part (41) running along the control surface (40) being fixed to the mount (29).
5. Apparatus according to claim 4, characterised in that the support part (23) at one end of at least one swivelling lever (27) is pivotably coupled about a first spindle (26), which first spindle (26) is aligned substantially parallel to the adjustment zone of the cam (40), and that the at least one swivelling lever (27) at its other end is held in the mount (29) swivellingly about a second spindle (28) aligned parallel to the first spindle (26).
6. Apparatus according to claim 5, characterised in that the support part (23) is axially displaceable along the first spindle (26) and/or the second spindle (28).
7. Apparatus according to one of the claims 5 or 6, characterised in that a swivelling lever (27) is provided which is swivelingly connected to the support part (23) substantially in a middle region, while the two edge areas of the support part (23) are provided with underpinning means (37) by means of which the support part (23) is buttressed on the mount (29) to prevent tipping about the first spindle (26).
8. Apparatus according to claim 7, characterised in that the underpinning means (37) take the form of rollers (38), and that these rollers (38) are resiliently supported on the mount (29) at one of the two edge areas of the support part (23).
9. Apparatus according to one of the claims 6 to 8, characterised in that the first spindle (26) is held rotatingly and non-slidingly in the support part (23), that provided in the middle region of the first spindle (26) is a thread (30) screwed into a matching counterthread (31) disposed in the swivelling lever (27), and that the first spindle (26) is driveable in both rotational directions by means of a motor (36) and a gear mechanism (35).
10. Apparatus according to claim 9, characterised in that the motor (36) and the gear mechanism (35) are secured to the swivelling lever (27), and that secured to the driven shaft of the gear mechanism (35) is a gearwheel (33) which meshes with a pinion (32) fixed, rigid against torsion, to the first spindle (26).
11. Apparatus according to one of the claims 4 to 10, characterised in that the control surface (40) is disposed on a component (39) secured detachably and replaceably to the support part (23), and that the guide part (41) is adjustable with respect to the mount (29).
12. Apparatus according to one of the claims 5 to 11, characterised in that the resilient element (42) is a spring by means of which the swivelling lever (27) and thus the cam (40) connected thereto can be pressed against the guide part (41).
13. Apparatus according to one of the claims 1 to 12, characterised in that a control unit (47) is provided, by means of which the adjustment of the roller (3) takes place automatically as a function of selectable parameters.
14. Apparatus according to one of the claims 1 to 13, characterised in that a position indicator (44) is provided for determining the momentary position of the roller (3).
15. Apparatus according to one of the claims 1 to 14, characterised in that the contact pressure of the roller (3) against the adjacent rollers (1, 2) is measurable by means of a dynamometer arrangement (45).

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