EP0826501B2 - 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 unit or Dampening roller of a printing machine regarding according to two adjacent fixed rollers the preamble of claim 1.

In printing machines, especially in has fast-running web-fed rotary printing presses it turned out that it is advantageous if the Inking unit and dampening unit rollers are adjustable are, that is, the contact pressure to the neighboring Rollers with which the adjustable rolls come into contact, even during production is customizable. These adjustable inking or Dampening unit rollers have a soft elastic Surface on. This can result in a permanently set Rollers the contact pressure to the neighboring rollers, with whom she is in contact. reason for that are above all the changing conditions of Machine standstill at which the contact pressure in a known manner by making an impression for example the applicator roller on the plate cylinder is adjustable up to full production speed. The higher the speed, the more the contact pressure increases.

An influence on the contact pressure of the above Rolling can also have the temperature that when starting production from room temperature a certain operating temperature will rise what also an increase in the contact pressure Has.

All of these changes in pressure between the corresponding rollers have a negative impact on print quality.

Like studies regarding the rolling behavior of multi-roll systems with the inclusion of have resulted in viscoelastic rollers is the adjustment of the contact pressure at the machine speed especially desirable because otherwise the necessary Torque to drive the rollers rise massively. By optimally adjusting the rollers can additional energy can 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 that 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. But it did shown that the production of this device is very complex and consequently it is also expensive and that the space required is considerable, so that an application is not possible in all machines.

From DE-A-44 00 563 a device is known with which an adjustment of the contact pressure of a transfer roller on two neighboring rollers is made possible. With this device, however Transfer roller not easily from either or both of the Park and roll the adjacent roller.

The object of the present invention is now that To design the device so that an adjustment of the corresponding Rolling in the desired manner is possible that the device easier in Structure and correspondingly cheaper to manufacture is that the Device installed in a press even when space is limited can be, and that in addition to adjusting the corresponding roller a parking of one of the adjacent rollers is made possible, the parked roller but remains in contact with the other adjacent roller.

According to the invention, this object is achieved by means of the Characterization 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.

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 to 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 support 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. In 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 curve 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 advantageously is the guide part with respect to the bracket on which it is attached, adjustable so that when inserted the roller in the bearing arrangements the ratio of Contact pressure on the two adjacent rollers changeable and adaptable to existing needs is.

The setting is advantageously carried out the roller automatically via a control device of selectable parameters. This gives you always one while the press is operating optimal position of the roller.

An actuating value transmitter is advantageously used for Determination of the current position of the roller provided, which reported back to the control device can be.

The control device can be triggered adjustment of the motor also depending on one contact pressure measured by means of a force measuring device of the roller to the adjacent rollers.

Embodiments of the present invention are subsequently based on the enclosed Drawing explained in more detail by way of example.

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 partly sectional representation of an embodiment of the device according to the invention according to the principle according to FIG.

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;

FIG. 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 Plate cylinder 1 of a printing machine, not shown and a friction roller 2. Between the plate cylinder 1 and the friction roller 2 is an application roller 3 arranged on both sides in an inventive Device 4 is held. This device 4 consists essentially of a pivot lever 5, which is pivotally mounted about the axis of the friction roller 2 is. At this pivot lever 5 is a guide lever 6 arranged pivotally about the axis 7. On the Axis 7 facing away from the end of the guide lever 6 a guide member 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 the machine frame of the printing machine, not shown is kept stationary and in a known manner.

The application roller 3 is in the guide lever 6 the axis 11 rotatably mounted. Via a linear drive 12, which is in operative connection with the swivel lever 5, can the device 4 around the axis of the friction roller 2 swivel. When swiveling the swivel lever 5 the guide part runs through this linear drive 12 8 along the control surface 10, whereby the in this guide lever 6 mounted application roller 3 in is essentially moved on a straight line 13, the 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 can be pressed.

Ideally, the control surface 10 is oriented that the straight line 13 running parallel to it essentially the bisector of the angle α corresponds to that formed by two connecting lines is, each the axis 11 of the applicator roller 3 with the Axis of the plate cylinder 1 or the axis of the friction roller 2 connect.

It is easily conceivable that the control surface 10 compared to the bisector of the Angle α is inclined by a certain amount, whereby when moving the applicator roller 3 to the contact pressure to the plate cylinder 1 and to the application roller 2 can no longer be changed accordingly, but in a certain ratio that is determined by the inclination of the control surface 10.

The setting of the application roller 3 with respect of the plate cylinder 1 and the friction roller 2 along an adjustment range 14 of the control surface 10. The control surface 10 has an adjustment range 14 subsequent further area 15, which against the friction roller 2 is inclined. If now the adjustment the application roller 3 from the plate cylinder 1 and the friction roller 2 takes place, the guide part arrives 8 from the setting range 14 of the control surface 10 in the further Area 15, the guide lever 6 is through the Spring 9 pulled against the friction roller 2, the applicator roller 3 is thus turned off by the plate cylinder 1 and is only in contact with the friction roller 2. The Contact pressure of the application roller 3 to the friction roller 2 is determined by the force of the spring 9. In known Way can in the parked state of the application roller 3 of the plate cylinder 1, for example, the inking unit pre-inked on the press.

Similarly, the principle works like it is shown schematically in Fig. 2. The application roller 3, with respect to the plate cylinder 1 and the friction roller 2 to be set is in a sliding part 16 stored, the over in a receiving part 17 a linear drive 18 is slidably held. The The receiving part 17 in turn can be moved in a guide 19 guided. The sliding part 16 is with a Guide part 8 equipped with a control surface 10 cooperates. The pressure of the spring 20 Guide part 8 pressed against the control surface 10. The Control surface 10 is, according to the principle Fig. 1, substantially parallel to the bisector 13 aligned. When moving the sliding part 16 by the linear drive 18 follows the friction roller 2 of the bisector 13, corresponding to the Process as described for Fig. 1. Here too the control surface 10 has an adjustment range 14 and another area 15 so that the same setting options and parking the platen 3 can be done like this with the system 1 is possible.

As can be seen from Fig. 3, the journal is 21 of the application roller, not shown, in one two half existing bearing arrangement 22, whereby the replacement of an application roller in known Wise and easy to do. This bearing arrangement 22 is on a support member 23 by means of screws 24 attached, which has the shape of a table. This supporting part 23 is on its bearing arrangement 22 opposite side equipped with two tabs 25, in which a first axis 26 rotatable but fixed is stored. Pivotable about this first axis 26 one end of a pivot lever 27 is articulated.

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

The first axis 26 points in its central area a thread 30, which in a corresponding Mating thread 31, arranged in swivel lever 27, is screwed in. On the first axis 26 is also a gear pinion 32 is rotationally fixed. With this Gear pinion 32 meshes with a gear 33 on the output shaft 34 of a gear 35 is attached. This Gear 35 is flanged onto an electric motor 36. The electric motor 36 and consequently the transmission 35 with gear 33 are attached to the pivot lever 27. By rotating the first axis 26 the thread screwed into the counter thread 31 30 a displacement of the first axis 26 in the longitudinal direction thereof, which has the consequence that the support member 23 accordingly is moved.

In order to avoid that the support part 23 around the can tilt first axis 26, this is with support means 37 equipped, which in the form of rollers 38 are formed on the two edge areas of the Carrier part are attached and the essentially corresponding runways of the support member 23 and the Bracket 29 can roll.

A component 39 is fastened on the supporting part 23 which the control surface 40 is attached accordingly the control surface 10 according to FIGS. 1 and 2. This control surface 40 acts with a guide part 41 together, which is attached to the bracket 29 and corresponds to the guide part 8 according to FIGS. 1 and 2. This control surface 40 also has an adjustment range and another area for parking the Application roller on as described for FIGS. 1 and 2 has been.

One between bracket 29 and pivot lever 27 attached elastic member 42, which as Compression spring is formed, causes the support member 23rd and thus the control surface 40 against the guide part 41 are pressed.

During the displacement of the support part 23 the control surface 40 follows the swivel lever 27 Guide part 41. Here is the adjustment range of the control surface 40 substantially parallel to the bisector 13 aligned as described for FIG. 2 has been. While moving the support part 23, triggered by turning the first axis 26, makes the pivot lever 27, caused by the Control surface 40, especially when it comes to parking the friction roller goes, a pivoting movement. Around a bracing of the support part 23 on the holder 29, on which the support part 23 by the support means 37 is supported, is to be avoided between the support means 37, which on an edge region of the support part 23 are attached, and the support member 23 a plate spring 43 used. This can cause minor deflections of the support member 23 added to the bracket 29 out become. To the position of the support member 23 with respect the pivot lever 27 and consequently the bracket To be able to determine 29 is on the swivel lever 27 Actuator 44 attached with a control device is electrically connected, as described later becomes.

Fig. 4 shows the bearing assembly 22 on the support member 23 is attached. The first axis 26 is how already mentioned, rotatable but fixed in both Tabs 25 of the support member 23 are mounted. When twisting this first axis 26 shifts with respect of the pivot lever 27 and takes the supporting part 23 with. The gear pinion 32 moves accordingly also with respect to the gear 33, which is why it has a correspondingly large width.

The second axis 28, which is in the holder 29 is held, and around which the pivot lever 27 can be pivoted with a force measuring device 45 be equipped, for example from a load cell 46 can exist in the pivot lever 27 is used and the storage of the second axis 28 records. This load cell 26 is with a control device electrically connected as described later becomes.

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

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

In Fig. 6 is in turn attached to the support member 23 Bearing arrangement 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, in this figure Swiveling the pivot lever 27 about the second Axis 28 shown. By the compression spring 42 Swivel lever 27 and with this the support part 23 with the Control surface 40 (FIG. 3) against the guide part 41 (FIG. 3) pressed.

Fig. 7 shows the guide part 41, which on the Bracket 29 is attached, and the control surface 40, the it is provided in component 39 which component 39 on Support member 23 is attached. The guide part 41 is on one adjustable eccentric 54 attached, as well 5 can be seen. This eccentric 54 can for example when assembling this Device can be set, for example the contact pressure of the application roller 3 to the 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 be, by appropriate choice the shape of the control surface the ratio of the contact pressure for example the application roller / friction roller for pressure application roller / plate cylinder can be influenced.

For hiring and stopping, for example the application roller 3 with respect to the friction roller and plate cylinder a control device 47 is provided, such as this is shown schematically in Fig. 8. This can for example a programmable logic controller 48, with which the target position of the application roller 3 is specified. The actual position of the application roller 3 is sent to the programmable by the control value transmitter 44 Control 48 reported back. By driving the motors 36, the application roller set accordingly. To determine the setpoint the respective roller position can be programmed Control 48 also information are fed by the machine control 49, for example about speed, running time, arrival and departure Parking etc.

It is also possible to use other actual values, for example the determined via the force measuring device 45 Contact pressure or other values directly on the Machine can be determined using measuring probes 50, in enter the programmable controller 48. Here, the roll diameter of the adjustable roller can be entered due to this the position of the roller is adjusted accordingly.

The stored setpoints and the actual values about the location of the adjustable rollers as well as others usable influencing factors that influence the Position of the adjustable roller can have via a display 51 of the programmable logic Controller 48 are shown and controlled, they but can also be in the control device 47 attached keyboard 52 can be changed.

With this device according to the invention will optimally set the appropriate Rolling with respect to two adjacent rolls allows, the structure of this device can be kept simple, and being the setting can be controlled automatically, depending the machine parameters to be taken into account.

Claims (14)

1. Apparatus for adjusting an inking- or dampening-device roller (3) of a printing machine relative to two further adjacent, fixed rollers (1; 2), whose ends of the spindle about which the inking- or dampening-device roller (3) is rotatable, are borne in each case in a bearing arrangement (22), which are displaceable, with respect to a machine frame (53) of the printing machine, in a plane which is situated perpendicular to the spindle, via drive means, which in each case consist of a single linear drive (12; 18), which displacement 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 the respective axis of the adjacent rollers (1; 2), 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) co-operating with a guide part (8; 41), which control surface has at least one adjustment zone (14), which adjustment zone (14) is oriented substantially parallel to the angle bisector (13), in 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), and in that the control surface (10; 40) has a further zone (15) adjoining the adjustment zone (14), which further zone is inclined toward the one roller (2) so that the inking- or respectively dampening-device roller (3), upon displacement into this further zone (15), is supported by the pressing force exerted on the one 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- or respectively dampening-device roller (3) is disengaged from the other roller (1).
2. Apparatus according to claim 1, characterised in that the inking- or respectively dampening-device roller (3) is an inking roller (3), which is disposed between the one roller (2), which is a distributor roller, and the other roller (1), which is a plate cylinder, and in 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).
3. Apparatus according to claim 1 or 2, 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).
4. Apparatus according to claim 3, 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).
5. Apparatus according to claim 4, characterised in that the support part (23) is axially displaceable along the first spindle (26) and/or the second spindle (28).
6. Apparatus according to one of the claims 4 or 5, 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).
7. Apparatus according to claim 6, 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).
8. Apparatus according to one of the claims 5 to 7, 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).
9. Apparatus according to claim 8, 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).
10. Apparatus according to one of the claims 3 to 9, 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).
11. Apparatus according to one of the claims 4 to 10, 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).
12. Apparatus according to one of the claims 1 to 11, 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.
13. Apparatus according to one of the claims 1 to 12, characterised in that a position indicator (44) is provided for determining the momentary position of the roller (3).
14. Apparatus according to one of the claims 1 to 13, 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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