EP1461208A2

EP1461208A2 - Device for regulating cylinders in a printing machine

Info

Publication number: EP1461208A2
Application number: EP02804558A
Authority: EP
Inventors: Bernd Klaus Faist; Wolfgang Otto Reder; Georg Schneider
Original assignee: Koenig and Bauer AG
Current assignee: Koenig and Bauer AG
Priority date: 2001-12-06
Filing date: 2002-09-21
Publication date: 2004-09-29
Anticipated expiration: 2022-09-21
Also published as: JP4068063B2; US20050076800A1; US7117792B2; JP2005511357A; ATE342801T1; DE10244044B4; EP1468824B1; CN1982055A; US20050223924A1; AU2002366534A1; ATE318707T1; EP1461207A2; AU2002366534A8; DE50205974D1; ATE423001T1; CN1617799A; WO2003049948A3; DE10244044A1; DE10244043B4; WO2003049947A2

Abstract

To set the position of one roller (21) against another roller (22) in a printing press, for adjustment and/or on installation/dismantling, at least two actuators are used which work in different directions. One actuator (34) uses a pressure hose to exert a radial force in one direction, and a spring (43) applies the radial force in the opposite direction as a plate spring packet. The opening angle between the two actuators on the same roller exerts the same aligned radial forces on both rollers.

Description

description

Devices for setting rollers in a printing press

The invention relates to devices for adjusting a contact pressure exerted by two rollers on another roller in a printing press and / or for parking on or of at least one of these rollers according to the preamble of claim 1, 2 or 3.

Inking units or dampening units in printing presses are used to convey the ink or dampening solution required for the printing process from appropriate supply facilities into the printing zone. Rollers or cylinders are provided in the inking unit or dampening unit to form the ink film or dampening solution film required. The terms roller and cylinder have an equivalent meaning for the understanding of the present invention. The rollers come into contact with one another in so-called roller strips, so that the ink film or dampening solution film in the roller strips can be transferred from one roller to another roller.

In such inking units or dampening units, rollers with adjustable bearings are provided in the machine frame, so that by adjusting these rollers with adjustable bearings relative to the other rollers, the contact pressure in the roller strips can be changed. EP 08 26 501 A1 discloses an inking unit with a friction roller mounted on the frame and a form cylinder mounted on the frame, the ink being transferred from the friction roller to the form cylinder by an application roller arranged between the friction roller and the form cylinder. The applicator roller itself is adjustable in the machine frame and can be pressed into the gap between the friction roller and the forme cylinder with a variable force. The device for mounting the application roller is designed so that the force with which the application roller in the Gap between the forme cylinder and friction roller is always pressed along an bisector between the friction roller and the forme cylinder. In other words, this means that although the size of the force for pressing the application roller can be changed, the direction of the force is unchangeably predetermined by the design of the adjusting device. To adjust the contact pressure in the roller strips between the forme cylinder and the friction roller on the one hand and the applicator roller on the other hand, only the size of the contact pressure can be changed, the resulting contact pressures in the roller strips resulting from the given geometry.

Through the patent specification DD 64 064 a device for clamping bearing bushes for printing and form cylinder bearings of a printing press is also known, the device comprising a hydraulic pressing of the bearing bushes against the bore wall of the machine frame, the bearing bushes consisting of two bush sleeves shrunk onto one another, whereby in the The inner wall of the outer sleeve has two hydraulically actuated pressure chambers, both of which are below 120 ° to the result of the mean forces acting on the bearing. With this device, the concentricity of the cylinders is improved, because by eliminating the play that the bearing bushes have in the bore of the machine frame that accommodates them, a largely vibration-free running of the cylinders is achieved.

The patent DE 15 61 014 C1 shows a roller bearing adjustable in only one direction, in particular for friction and application rollers of inking units on printing presses, adjustment means for adjusting the roller being provided transversely to its axis, the adjustment means being located between a bearing journal connected to the frame wall and a housing, preferably pot-shaped, which receives a roller end, the bearing journal and the housing being counteracted by spring elements counteracting one another by the setting means are connected. The spring elements are preferably designed as radial rubber buffers and the adjusting means acting on the bearing journal either as a radially arranged adjusting screw or as two adjusting screws arranged at 45 °. According to a further embodiment, the turning on or turning off of the roller and thus the adjustment of the roller bearing can also take place through two diametrically arranged pressure chambers which can be acted upon by air or a liquid, the pressure chambers acting counter to one another being pressurized depending on the desired direction of action.

DE 100 01 582 A1 discloses a device for adjusting the contact pressure between rollers in a printing press, hydraulic adjusting elements, preferably designed as double-piston cylinders, being arranged between adjacent rollers.

The invention has for its object to provide methods and devices for adjusting a contact pressure exerted by at least one roller on another roller in a printing press and / or for turning on / off at or of at least one of these rollers.

The object is achieved by the features of claim 1, 2 or 3.

The advantages that can be achieved with the invention are, in particular, that when the contact pressure is set between the adjustable roller and the rollers lying against it, not only the force magnitude is varied, but also the direction of force. This means that the contact pressures in the two roller strips can ultimately be set independently of one another.

Special advantages with regard to the downtimes when setting the inking unit or dampening unit result if the press-in pressure in the roller strips is not is gradually set one after the other, but essentially simultaneously. This means that when setting the force with which the adjustable roller is pressed against the other rollers, the force magnitude and the direction of force can be varied until the desired contact pressure results in all of the rollers.

In order to avoid an unwanted adjustment of the contact pressures, it is advantageous if the position of the adjustable roller is fixed after actuation of the contact pressure relative to the other two rollers by actuating a fixing device. If the size and direction of the force for adjusting the adjustably mounted roller can essentially be chosen freely, this can also be used for switching off the ink or the dampening solution. For these applications, the force for adjusting the adjustable roller is selected in a direction that points away from the other two rollers. As a result, the adjustable roller can be moved out of the gap until there is no longer any contact between the adjustable roller and the other rollers. As soon as the adjustable roller is separated from the other rollers, no dampening solution or ink is then transferred into the roller strip.

As an alternative to this, the adjustably mounted roller can also be arranged on a lever mechanism which can be pivoted about the axis of rotation of one of the other rollers. To turn off the ink or dampening solution, the roller can then be lifted off one of the other rollers by driving the lever mechanism. The adjustable roller can be pressed into the gap between the other two rollers with a force that is adjustable in size and direction after moving to the functional position of the lever mechanism, in which the adjustable roller comes to rest on the other two rollers. This setting is then fixed by actuating a fixing device between the adjustable roller and the lever mechanism. If the ink or dampening solution is to be switched off later, the lever mechanism is pivoted into the first functional position, in which the adjustable roller is supported by one roller is lifted off. When the ink or dampening solution is turned on, swiveling the lever mechanism back into the second functional position without additional adjustment of the contact pressures is sufficient, since the correct setting is fixed by the fixing device between the lever mechanism and an adjustable roller.

Exemplary embodiments of the invention are shown in the drawings and are described in more detail below.

Show it:

Figure 1 is a schematically illustrated device for adjusting the contact pressure between two rollers in longitudinal section.

FIG. 2 shows the device shown schematically in cross section according to FIG. 1 in a basic position;

3 shows the device shown schematically in cross section according to FIG. 1 in a deflected position;

FIG. 4 shows the device according to FIG. 1 in a perspective view without roller holder;

5 shows the device according to FIG. 1 in a perspective view with roller holder;

6 shows a section of an inking unit in a schematically represented side view;

Fig. 7 shows a second embodiment of an inking unit in a schematically illustrated side view;

FIG. 8 shows a section of the inking unit according to FIG. 7 in a schematically represented side view with a roller set against two rollers and an associated diagram of the force vectors;

9 shows a section of the inking unit with two rollers positioned against one another and an associated diagram of the force vectors;

10 shows a section of the inking unit with a roller that has been parked and an associated diagram of the force vectors;

11 shows a detail from the inking unit with a roller set against two rollers and a representation of the radial forces of the actuators;

FIG. 12 shows a third exemplary embodiment of a roller arrangement with two rollers that can be adjusted and engaged independently against a third roller;

Fig. 13 shows a fourth embodiment of an inking unit in a schematically illustrated side view.

1 shows a device 20 for adjusting the contact pressure between a first roller 21 and a second roller 22. The roller 21 can be detachably fastened with the ends of its axis 23 to a quick fastener 24 provided on the device 20. Such quick fasteners are known from the prior art and have a semicircular bearing shell, into which the ends of the axis 23 can be inserted. The axis 23 can then be fixed to the quick-release fastener 24 by fastening an upper bearing shell (not shown in FIG. 1). The device 20 is essentially composed of a frame holder 26 and a roller holder 27, which can be displaced relative to one another in a positioning plane that extends perpendicular to the drawing plane. The frame holder 26 is constructed from a base plate 28, which can be pivotably attached to the frame of a printing press, for example by means of a swivel arm, and a sleeve body 29. On the side facing the roller 21, the sleeve body 29 has a recess 31 into which a cylindrical section 32 of the roller holder 27 engages. The inside diameter of the recess 31 or the outside diameter of the section 32 is selected such that a circularly cylindrical gap 33 with a gap width of, for example, 1 mm to 10 mm, preferably 2 mm, is formed in the basic position. The maximum adjustment range for adjusting the roller holder 27 relative to the frame holder 26 is defined by the gap 33.

In order to be able to implement the adjusting movements required when adjusting the roller 21 or to be able to apply the desired contact pressure between the roller 21 and the roller 22, a total of four z. B. Actuators 34 designed in the manner of pressure hoses 34, of which only two are shown in section in FIG. 1, are arranged. The pressure chambers 36 formed by the wall of the actuators 34 can be pressurized via feed lines 48 (not shown in FIG. 4). Depending on the respective pressure conditions in the four actuators 34, a resultant force acts on the roller holder 27, so that by appropriately controlling the pressure in the actuators 34, the roller 21 can be pressed against the roller 22 with the desired contact pressure. Since the air cushion under pressure in the actuators 34 is compressible, mechanical disturbances can be absorbed by the resulting spring action.

In order to fix the roller holder 27 relative to the frame holder 26, lamella elements 37 are fastened to the roller holder 27, which are also fastened to the sleeve body 29 Slat elements 38 are arranged intermeshing to form a plate pack. For preferably frictional clamping of the lamella elements 37; 38 formed plate pack a cross-sectionally T-shaped punch 39 is provided, the circular punch head 40 with an annular flange 41 comes to rest on the outermost plate element 37 or 38 of the plate pack. At the opposite end of the plunger 39, a pressure plate 42 is fastened, on which the spring force of a spring element 43 designed in the manner of a plate spring assembly 43 acts. The spring element 43 is preloaded between the pressure plate 42 and the sleeve body 29, so that that of the lamella elements 37; 38 plate pack formed by the spring force which from the punch 39 to the plate elements 37; 38 is transmitted, is stuck.

In order to adjust the roller holder 27 relative to the frame holder 26, in particular when adjusting the contact pressure between the rollers 21 and 22, the plate elements 37; 38 or the stamp 39 and the pressure plate 42 formed fixing device can be solved. For this purpose, a pressure connection 44 is provided in the base plate 28, through which a pressure chamber 46 between the pressure plate 42 and the base plate 28 can be acted upon by a pressure medium, for example compressed air. As soon as the air pressure acting on the pressure plate 42 exceeds the spring force of the spring element 43, the plunger 39 is lifted from the outermost lamella element 37 or 38 to such an extent that they are no longer frictionally clamped and can be displaced relative to one another.

The contact pressure between the rollers 21 and 22 is set, for example, in the following manner.

A sufficient pressure is first applied to the pressure chamber 46 so that the lamella elements 37; 38 can no longer be clamped. Then the actuators 34 are each subjected to just as much pressure that the desired contact pressure is formed between the rollers 21 and 22 or between the roller 21 and other rollers, not shown in FIG. 1, and leads to a contact strip of the desired width. As soon as the correct setting with the desired contact pressure between the rollers 21 and 22 is found, the pressure chamber 46 is depressurized, as a result of which the plunger 39 causes the lamella elements 37; 38 clamped together so that the roller holder 27 is fixed relative to the frame holder 26 in the desired position. Finally, the actuators 34 are depressurized. Irrespective of the method described here, the fixing device, which is preferably designed to be frictionally engaged, can alternatively or additionally also have elements which engage in a form-fitting manner.

2 and FIG. 3 schematically illustrate the principle of operation of the device 20 when the actuating movement is required.

FIG. 2 shows the frame holder 26 with the recess 31 and the portion 32 of the roller holder 27 engaging therein. The dimensions are used to form a gap 33 between the frame holder 26 and the portion 32 of the roller holder 27, in which the gap shown in FIG. 2 and 3 are arranged only schematically by actuators 34 indicated by force arrows. The possible positioning movements between the frame holder 26 and the roller holder 27 are defined by a setting plane which extends in the drawing plane in the illustration of FIGS. 2 and 3, the setting range of the positioning movements being limited by the width of the gap 33.

As shown by way of example in FIG. 3, the roller holder 27 and, as a result, the roller 21 attached to it can be laterally displaced relative to the frame holder 26, which is brought about by a corresponding actuation of the actuators 34 and the consequent force effect on the section 32. As soon as the desired position of the roller holder 27 relative to the frame holder 26 has been found, the position of the lamella elements 37; 38 or the stamp 39 and the pressure plate 42 formed Fixing device are operated so that the position is permanently fixed and the actuators 34 do not have to be driven further.

4 shows the device 20 without a roller holder 27 in a perspective view. The sleeve body 29 is fastened to the roller holder 27 (see FIG. 5) by means of four fastening screws 47. Between the sleeve body 29 of the frame holder 26 and the roller holder 27, on the forward side of which the half-shell-shaped quick-release fastener 24 (see FIG. 5) is partially recognizable, the four z. B. arranged in the manner of pressure hoses 34 actuators 34 which can be acted upon via lines 48 with compressed air. By means of the pressure plate 42, the lamella elements 37; 38 be relaxed.

5 shows the device 20 with the base plate 28, the frame holder 26, the roller holder 27, the quick-release fastener 24, the fastening screws 47 and the actuators 34 in a perspective view from the front. One recognizes the extremely compact design of the device 20, which due to its overall rotationally symmetrical design (apart from the base plate 28) has a smaller diameter than the roller 21 itself (see FIG. 1).

6 shows the detail from an inking unit 51 with an adjustable roller 52 and two rollers 53 fixed to the frame; 54 shown. The adjustable roller 52 is mounted with a device 20 in the machine frame, as was explained in FIGS. 1 to 5. This is indicated schematically in FIG. 6 by the air chambers 56 to 59 and 61. The function of the pressure chambers 56 to 59 corresponds to the function of the pressure chambers 36 on the device 20. That is, by venting or venting the pressure chambers 56 to 59, the adjustably mounted roller 52 can be pressed into or out of the gap between the rollers 53 and 54 be pulled out of the gap. The function of the pressure chamber 61 corresponds to the function of the pressure chamber 46 on the device 20, so that the Pressure chamber 61, the adjustably mounted roller 52 can be fixed in its position relative to the rollers 53 and 54 mounted on the frame.

To adjust the contact pressure in the roller strips 62; 63 between the rollers 53 and 54 on the one hand and the adjustable roller 52 on the other hand, can be done as follows.

First of all, an air pressure is applied in the pressure chambers 56 and 57, which acts as a result of an adjusting force on the roller 52 in the desired size and direction. The pressure chamber 61 is then filled with compressed air in order to release the fixing of the roller 52. The roller 52 is then pressed against the rollers 53 and 54 under the contact pressure applied by the pressure chambers 57 and 56. By changing the pressure in the pressure chambers 56 and 57, the contact pressure in the roller strips 62 and 63 can be variably set independently of one another. As soon as the contact pressure in the roller strips 62 and 63 corresponds to the desired values, the pressure chamber 61 is vented by releasing the pressure, and the adjustable roller 52 is thereby fixed relative to the rollers 53 and 54.

As a result, the contact pressure in the roller strips 62; 63 can be changed remotely. The readjustment of the roller strips 62; 63 is also possible during production because the color transfer is not interrupted. When readjusting during ongoing production, only the pressure chamber 61 is ventilated to release the fixing device and the pressure in the pressure chambers 56; 57 changed until the desired contact pressures on the roller strips 62; 63 result.

It is not absolutely necessary to fix the setting by venting the pressure chamber 61. If the set pressures in the pressure chambers 56 and 57 are maintained during production, the fixation by venting the pressure chamber 61 can be omitted. In this case, the roller 52 is pressed resiliently against the rollers 53 and 54 and can move backwards for example in the event of imbalance and vibrations. However, if the roller 52 is not fixed, care must be taken to ensure that the vibrations occurring in the inking unit 51 do not exceed a permissible level.

In order to interrupt the ink feed in the inking unit 51, i. H. to shut off the paint, the pressure chambers 56 and 57 are vented and the pressure chambers 58 and 59 are vented. As soon as the fixation of the roller 52 is released by venting the pressure chamber 61, the roller 52 is moved out of the gap between the rollers 53 and 54. If there is no longer any contact between the roller 52 and the rollers 53 or 54, the pressure chamber 61 is ventilated again and the roller 52 is thereby fixed in the parked position. As a result, it becomes possible to shut down the roller 52 even while production is running without removing the roller 52. For errors caused by jamming of the roller 52 when setting the contact pressures in the rollers 62; To avoid 63, the roller 52 can also be switched off in the manner described before the contact pressures are set by venting the pressure chambers 56 and 57.

Of course, by appropriately controlling the pressure chambers 56 to 59, it is also possible to switch the roller 52 off only one of the rollers 53 and 54, respectively. If, for example, the pressure chambers 57 and 58 are ventilated and the fixation of the roller 52 is released, it can be achieved that the roller 52 is set down by the roller 53, but at the same time remains in contact with the roller 54.

Fig. 7 shows an inking unit 66, with the printing ink from a roller 67, for. B. anilox roller 67 on a cylinder 68, for. B. a forme cylinder 68 is transferable. For this purpose, an upper roller train 69 with two rollers 71; 72, e.g. B. two ink transfer rollers 71; 72 and a roller 73, e.g. B. an inking roller 73 and a lower roller 74 with two rollers 76 and 77, z. B. two ink transfer rollers 76 and 77 and an inking roller 78 are provided. The ink transfer rollers 71; 72; 76; 77 and the inking rollers 73; 78 are in a frame 79 adjustable. To adjust these rollers 71; 72; 76; 77, 73; 78 come z. B. devices for use, which correspond to the device 20 and each preferably four pressure chambers for adjusting the contact pressures or for switching off the rollers 71; 72; 76; 77, 73; 78 have.

There are various ways of setting the contact pressures in the inking unit 66. According to a first method variant, the contact pressures in the roller strips of the upper roller train 69 and the lower roller train 74 are set in succession. I.e. First the fixation of the inking roller 73 is released and the contact pressure in the roller strips to the anilox roller 67 and to the forme cylinder 68 is set by ventilation of the corresponding pressure chambers. At the same time, the contact pressure between the inking roller 78 of the lower roller 74 and the anilox roller 67 or the forme cylinder 68 can be set. After the inking rollers 73 and 78 have been set, they are fixed and then the contact pressure between the inking roller 72 and the inking roller 73 and the inking roller 77 and the inking roller 78 is adjusted by venting the corresponding pressure chambers. As soon as the ink transfer rollers 72 and 77 are fixed again, the ink transfer rollers 72 and 76 are finally adjusted by ventilating the pressure chambers, so that the roller strips between the ink transfer rollers 71 and 76 on the one hand and the anilox roller 67 or the ink transfer rollers 72 and 77 on the other hand result in the desired contact pressures. If the ink transfer rollers 71 and 76 are also fixed again, the entire inking unit 66 is completely set.

If the individual ink transfer rollers 71; 72; 76; 77 or inking rollers 73; 78 set in the roller trains 69 and 74 one after the other, this considerably reduces the outlay in terms of equipment for implementation, since the individual rollers 71; 72; 76; 77, 73; 78 the same adjustment devices can be used. When realizing the Settings of the individual rollers 71; 72; 76; 77, 73; 78 by venting pressure chambers, it is sufficient, for example, to provide only two proportional valves, since these successively for the adjustment of the individual rollers 71; 72; 76; 77, 73; 78 can be used. In addition, by adjusting the rollers 71; 72; 76; 77, 73; 78 successively ensures that the setting of the rollers 71; 72; 76; 77, 73; 78 do not influence each other. However, the adjustment of the individual rollers 71; 72; 76; 77, 73; 78 a relatively long response time in succession.

According to a second method alternative, the ink transfer rollers 71; 72; 76; 77 or the inking rollers 73; 78 all set at the same time. I.e. the pressure chambers on the individual ink transfer rollers 71; 72; 76; 77 or inking rollers 73; 78 are all subjected to suitable air pressures at the same time. It should be noted, however, that the contact pressure between the individual rollers 71; 72; 76; 77, 73; 78 also to the rollers 71; arranged in front or behind in the roller train 69 or 74; 72; 76; 77, 73; 78 affects, so that the setting of the individual rollers 71; 72; 76; 77, 73; 78 mutually influenced.

When selecting the air pressures in the individual pressure chambers for setting the various rollers 71; 72; 76; 77, 73; 78 are therefore those on the individual rollers 71; 72; 76; 77, 73; To add 78 acting force vectors vectorially.

Such an addition of the force vectors for the ink transfer roller 71 is shown in FIG. 8. On the ink transfer roller 71 act in addition to the z. B. formed by the weight force force vector 80, the force vector 81 and 82, the z. B. correspond to the pressing forces acting in the roller strips 81 and 82, which result at predetermined contact pressures of the ink transfer roller 71 to the anilox roller 67 and to the ink transfer roller 72. If the weight force 80 and the contact forces 81 and 82 are added vectorially, a force difference results which is absorbed in this way by adjusting the air pressure in the air chambers 83 and 84 must result that the resultant external force no longer acts on the ink transfer roller 71. In FIG. 8, the force vector 86, e.g. B. the adjusting force 86, and the applied by the pressure chamber 84 force vector 87, z. B. the setting force 87, vectorially plotted. It can be seen that the force vectors 80; 81; 82; 86; 87 result in a closed flow of force and, as a result, there is no longer any external force acting on the ink transfer roller 71. For each of the adjustable rollers 71; 72; 76; 77, 73; 78 must be set for all rollers 71; 72; 76; 77, 73; 78 such a closed flow of force must be set up in order to be able to take into account the influence of the various force quantities on one another.

A method for setting a contact pressure 81 exerted by a first roller 71 on a second roller 72 and at least one third roller 67 in a printing press; 82, the first roller 71 being held in a roller holder 27, which in turn is mounted in a frame holder 26, at least two actuators 83; 84; 93; 94 are arranged between the roller holder 27 and the frame holder 26, the actuators 83; 84; 93; 94, in its actuated operating state, a force 89; directed radially onto the roller holder 27; 91; 96; Exercise 97 thus includes as process steps that a resultant 88 as a vector sum of all forces 80 acting on the first roller 71 after the adjustment; 81; 82 is formed that those actuators 83; 84 are actuated by a control signal, the radial force 89; 91 counteracts the resultant 88 and that the radial force 89; 91 of the actuated actuators 83; 84 to an amount 86; 92 is set until its vector sum corresponds to the resultant 88. This method assumes that at the beginning of the process sequence at least some of the forces 81; 82 do not yet appear real, but are the desired values because at least the contact forces 81; 82 can only be set to a desired value by the proposed method. The resultant 88 formed as a vector sum is thus a setpoint value to which radial forces 89; 91 can be set in vectorial addition. In the case of parting off a first roller 71 from at least one second roller 67; 72 in a printing press, the first roller 71 being held in a roller holder 27 which in turn is mounted in a frame holder 26, at least two actuators 83; 84; 93; 94 are arranged between the roller holder 27 and the frame holder 26, the actuators 83; 84; 93; 94, in its actuated operating state, a force 89; directed radially onto the roller holder 27; 91; 96; 97, a method is obtained in an analogous manner, which is characterized in that a resultant 88 is a vector sum of all the forces 80; 81; 82 is formed that at least one actuator 83; 84 is actuated by a control signal, the radial force 89; 91 counteracts the resultant 88 and that the radial force 89; 91 of the actuated actuator 83; 84 to an amount 86; 92 is set, which corresponds to the vector sum of the resultant 88.

In both of the methods described above, the weight 80 of the first roller 71 is preferably included in the vector sum to form the resultant 88, because its contribution to the vector sum is generally not negligible. If only the weight 80 of the first roller 71 forms the resultant 88 because z. B. no contact forces act on the first roller 71, the radial force 91; 97 of the actuators 83; 94 at least temporarily to an amount 86; 98 is set such that its vector sum is greater in magnitude than the resultant 88 during the parking. This method step serves for the parking of the first roller 71, ie for the application of a force which causes the first roller 71 to move. When the first roller 71 has reached a certain desired position, only an amount is required for the force counteracting the resultant 88, which keeps the first roller 71 in an idle state. In the preferred embodiment, the actuators 83; 84; 93; 94 the roller holder 27 in the frame holder 26, the actuators 83; 84; 93; 94 the center of the roll holder 27 z. B. can move up to 15 mm eccentrically from the center of the frame age 26. The Roller holder 27 can be displaceably eccentrically in the frame holder 26 such that the first roller 71 and the second roller 72 come out of contact, this displacement being effected by the actuation of only a single actuator 83; 84; 93; 94 can be caused, which is arranged between the roller holder 27 and the frame holder 26. At least one spring element can be provided between the roller holder 27 and the frame holder 26, against which the actuators 83; 84; 93; 94 move the roller holder 27 in the frame holder 26 and which the roller holder 27 in the by the actuators 83; 84; 93; 94 returns the unloaded operating state to a starting position.

Preferably, only those actuators 83; 84; 93; 94 actuated, the radial force 89; 91; 96; 97 a positive amount 86; 92; 98 against the resultant 88. It is advantageous if the roller holder 27 in the frame holder 26 z. B. is fixed in the manner described in connection with FIG. 1 after the vector sum has been reduced to the amount 86; 92; 98 set radial forces 89; 91; 97 corresponds to the resultant 88.

A device 20 for setting a contact pressure 81 exerted by a first roller 71 on a second roller 72 and at least one third roller 67 in a printing press; 82 and / or for turning on / off a first roller 71 on or of a second roller 72 and at least a third roller 67 and thus for carrying out the methods described above, the first roller 71 being held in a roller holder 27 which is in turn mounted in a frame holder 26, at least two actuators 83; 84; 93; 94 are arranged between the roller holder 27 and the frame holder 26, the actuators 83; 84; 93; 94, in its actuated operating state, a force 89; directed radially onto the roller holder 27; 91; 96; 97 can exercise z. B. characterized in that at least one radial force 89; 91 of the actuators 83; 84 with a force 80 acting on the first roller 71; 81; 82 escapes. Another special arrangement for the The aforementioned device 20 is obtained when two actuators 83; 84 are arranged such that the amount 86; 92 of the radial force 89; 91 is set to the same size and a vector sum of these amounts 86; 92 counteracts a resultant 88, the resultant 88 in the manner already mentioned as a vector sum of all forces 80 acting on the first roller 71; 81; 82 is formed.

As can be seen from FIG. 8, the radial forces 89; 91 of the actuators 83; 84 an opening angle α with each other. The radial forces 89; 91 the force amounts 86; Apply 92, which are equal in vectorial addition to the resultant 88. The opening angle α between the radial forces 89; 91 by the actuators 83; 84 after they have been actuated, ie after they have been acted upon by a pressure medium, can also be found between the radial forces 89; 91 rectified force vectors 86; 92. Depending on the arrangement of the actuators 83; 84 result in the diagram of the force vectors 86; 88; 92 between the resultant 88 and the force vectors 86; 92 different opening angles γ1; γ2, which, however, should be at least 15 ° to generate favorable force relationships. It is thus advantageous to determine the angular position of the radial forces 89; 91 of the actuators 83; 84 so that the radial force 89; 91 of two of the actuators 83; 84 is set such that each of these radial forces 89; 91 an amount 86; 92 of at least 30%, preferably 50%, in particular 70%, of an opposing resultant 88, the resultant 88 in turn as a vector sum of all forces 80 acting on the first roller 71; 81; 82 is formed. Otherwise, one of the two actuators involved 83; 84 an excessively high proportion of force 86; 92, whereas the other would hardly be used. But because the actuators 83; 84 applicable forces are limited in amount in practical implementation, such arrangements are advantageous in which the participating actuators 83; 84 make the same possible contribution under the given structural conditions, which in FIG. B. is indicated by the two dashed force vectors that in this example they both have a share of 70% of the opposing resultants 88. 8, the opening angle α between the radial forces 89; 91 selected by way of example at 90 °, so that the force vectors 86; 92 and the resultant 88 always form a right-angled triangle with one another, the apex of the between the radial forces 89; 91 existing opening angle α depending on the distribution of the radial forces 89; 91 on a circular arc line shown in dashed lines in FIG. 8. Other advantageous settings for the opening angle α can be between 45 ° and 135 °, in particular 90 ° and also 120 °. The opening angle α, which the radial forces 89; 91 of the actuated actuators 83; 84 form with each other, in many roller arrangements is not equal to an opening angle ß, which the contact pressure 82 exerted by the first roller 71 on the second roller 72 forms with the contact pressure 81 exerted by the first roller 71 on the third roller 67, the opening angle ß z , B. is between 30 ° and 180 °, but is preferably between 60 ° and 120 °, in particular at about 90 °.

In a preferred embodiment of the device 20, the actuators 83; 84; 93; 94 are formed in or on a wall of the frame holder 27, and preferably as side-bound pressure chambers (see FIG. 4) attached in or on a wall of the frame holder 26 or the roller holder 27, the pressure chambers being pressurized one to the roller holder Run 27 directed radial stroke, the z. B. can be up to 10 mm.

It is advantageous if the frame holder 26 has connections for supply lines for pressure medium supply for the hollow bodies or pressure chambers (FIGS. 4 and 5). At least the frame holder 26 is advantageously designed to be rotationally symmetrical, because then no special alignment with a frame wall 79 (FIG. 7) has to be taken into account during its assembly. The pressure chambers can have a membrane, with at least one web formed on the frame holder 27 being formed between the pressure chambers (FIG. 4), to which the membrane can be connected. In the constructive Embodiment either covers a self-contained annular membrane from all pressure chambers or an associated membrane is provided for each pressure chamber. The latter embodiment is shown in FIG. 4. The membrane is preferably inserted, glued or clamped into a groove made in the frame holder 27. Advantageously, three or four actuators 83; 84; 93; 94 or pressure chambers can be provided, which are preferably arranged equidistantly along the circumference of the roller holder 27.

FIG. 9 shows an arrangement similar to FIG. 8, but with the difference that here two rollers 67; 71 are employed against each other. A corresponding diagram of the force vectors 80; 81; 86; 88; 92 is shown, according to which the actuators 83; 84 the required forces 86; Apply 92. 10, the roller 71 is separated from its adjacent rollers 67; 72 completely turned off. Again, an associated diagram of the force vectors 80 illustrates; 86; 98 the effective force relationships, according to which to achieve this operating state for the roller arrangement, the actuators 83; 94 are to be operated.

11 shows a section of the inking unit with one against two rollers 67; 72 employed roller 71 and a representation of the radial forces 89; 91; 96; 97 of the actuators 83; 84; 93; 94. With this arrangement, the contact forces 81; 82 apply and to compensate for the weight force 80 acting on the roller 71 employed. With such an arrangement of actuators 83; 84; 93; 94, the roller 71 can be moved in any direction in the position plane, which here is the same as the plane of the drawing. Some devices 20 for setting a contact pressure 82 exerted by a first roller 71 on at least a second roller 72 in a printing press and / or for switching a first roller 71 on or off at least one second roller 72 do not like all of the actuators shown 83; 84; 93; 94 need, but only at least two actuators 83; 84, which in its actuated, ie pressurized operating state, a radial force directed into the first roller 71 89; 91 exercise because in the opposite direction of the radial force 89; 91 z. B. a preferably biased spring element is provided.

A third exemplary embodiment of a roller arrangement is shown in FIG. 12. It relates to a device 20 for setting a contact pressure 81; 82, which exert a first roller 71 and a second roller 72 on at least a third roller 67 in a printing press, and / or for turning a first roller 71 and at least one second roller 72 on and off a third roller 67, wherein for the first roller 71 and the second roller 72 actuators 83; 84; 93; 94 are provided which, in their actuated operating state, have a radial force 89; 91; 96; 97 exercise, each in the roller 71; 72 is directed. This device 20 is characterized in that an opening angle α1; α2 between the actuators 83; 84 on the same roller 71; 72 directed radial forces 89; 91 is the same for the first roller 71 and the second roller 72. In the first roller 71 and the second roller 72, the radial forces 89; 91; 96; 97 of the actuators 83; 84; 93; 94 each have an opening angle α1; α2 with each other, which is not equal to an opening angle β, which the contact pressure 82 exerted by the first roller 71 on the third roller 67 forms with the contact pressure 81 exerted on the third roller 67 by the second roller 72. As in the previously described devices 20, the actuators 83; 84; 93; 94 their radial force 89; 91; 96; 97 actuated by a control signal, ie the actuators 83; 84; 93; 94 are e.g. B. actuated by a control station assigned to the printing press. The opening angle α; α1; α2, the radial forces 89; 91 of the actuated actuators 83; 84 form with each other, z. B. between 45 ° and 135 °, preferably between 90 ° and 120 °. The opening angle β, which the contact pressure 82 exerted by the first roller 71 on the third roller 67 forms with the contact pressure 81 exerted by the second roller 72 on the third roller 67, can be e.g. B. between 30 ° and 180 °, preferably 60 ° to 120 °, in particular 90 °. Also in this device 20 with two rollers 71; which can be adjusted independently of one another on a third roller 67; 72, the first roller 71 and / or the second roller 72 can each be held in a roller holder 27, which in turn is mounted in a frame holder 26, the actuators 83; 84; 93; 94 are preferably arranged between the frame holder 26 and the roller holder 27. The frame holder 26 is advantageously designed as a housing in which the actuators 83; 84; 93; 94 are arranged (cf. FIG. 4 or 5), the housing being at least half-shelled. Again, it is recommended that the actuators 83; 84; 93; 94 form as a pressurizable hollow body, the z. B. pneumatically actuated and is preferably designed without piston rods. It is advantageous to at least partially form the hollow body or bodies from an elastomer material. In this roller arrangement too, the first roller 71 or the second roller 72 can be a roller of an inking unit or a dampening unit.

The inking unit 01 shown in FIG. 13 is used to apply printing ink to a cylinder 02, e.g. B. a forme cylinder 02, which in turn transfers the printing ink to a blanket cylinder 03. A web of material not shown in FIG. 13, e.g. B. a printing material web, for example a paper web, is carried out between the blanket cylinder 03 and an impression cylinder 04 and is printed by the contact with the blanket cylinder 03 with the desired print image. To supply the moisture required for the transfer of the printed image, a dampening unit 06 with a spray device 07 and various rollers 08a; 08b; 08c; 08d, e.g. B. dampening rollers 08a; 08b; 08c; 08d provided.

A certain amount of a pasty printing ink 10 is stored in a reservoir 09 designed as an ink fountain 09. By using a color ductor 11 in cooperation with a color knife 12, the printing ink 10 can be conveyed in a suitable manner. A color film of a certain thickness is applied by the ink ductor 11 to a downstream roller 13, e.g. B. film roller 13 transferred. By unrolling each adjacent lateral surfaces of the rollers 14; 15, e.g. B. ink transfer rollers 14; 15 or the respective downstream rollers 16; 17, e.g. B. ink rollers 16; 17 the printing ink 10 is then on two rollers 18; 19, e.g. B. two inking rollers 18; 19 transferred. The inking rollers 18; 19, in turn, roll on the forme cylinder 02 and in doing so carry the conveyed printing ink 10 on the forme cylinder 02.

The forme cylinder 02, the inking rollers 16; 17, the film roller 13 and the ink duct 11 are all mounted in a machine frame, not shown in FIG. 13. In the sense of this invention, this means that the setting pressure between the individual rollers 16; 17; 13 or the cylinder 02 not by adjusting these rollers 16; 17; 13 or cylinders 02 is changeable. The inking rollers 16; 17 can of course be moved relative to the machine frame in the axial direction in order to rub the ink on the adjacent ink transfer rollers 14 or 15 and ink application rollers 18 or 19. The “fixed” rolls are therefore not changeable with respect to the center distance.

The ink transfer rollers 14 and 15 and ink application rollers 18 and 19 are each mounted with two devices 20 on the opposite sides of the machine frame, so that between the rollers 16; 17; 13 or the cylinder 02 in the roller train of the inking unit 01, by actuating these devices 20, an adjustment of the ink transfer rollers 14 or 15 and ink application rollers 18 or 19 is possible. The contact pressure in the roller strips between the ink transfer rollers 14 and 15 and ink application rollers 18 and 19 on the one hand and the forme cylinder 02, the inking rollers 16; 17 and the film roller 13 and the ink ductor 11 on the other hand can be set one after the other. The inking unit 01 can be set particularly quickly by simultaneously adjusting the contact pressure in the roller strips everywhere. For this purpose, the devices 20, in which the ink transfer rollers 14 or 15 and ink application rollers 18 or 19 are mounted, are actuated essentially at the same time. The contact pressure in the individual roller strips is also influenced when all devices are actuated at the same time 20 excluded, since between the adjustable ink transfer rollers 14 and 15 and ink application rollers 18 and 19, respectively, a roller 16 or 17, namely the ink rubbing roller 16 or 17, is mounted fixed to the frame.

Also on the dampening unit 06, the dampening rollers 08a and 08c, which are adjustably mounted with devices 20, are arranged between the dampening rollers 08b and 08d, which are fixed to the frame, and the forme cylinder 02, which are fixed to the frame.

LIST OF REFERENCE NUMBERS

01 inking unit

02 cylinders, form cylinders

03 blanket cylinder

04 impression cylinder

05 -

06 dampening system

07 spraying device

08 -

09 storage container, ink fountain

10 printing ink

11 color guide

12 color knives

13 roller, film roller

14 roller, ink transfer roller

15 roller, ink transfer roller

16 roller, ink roller

17 roller, inking roller

18 roller, inking roller

19 roller, inking roller

20 device

21 roller

22 roller

23 axis

24 quick release

25 -

26 frame holder

27 roller holder Base plate (26)

Sleeve body (26)

-

Recess (26)

Section (27)

gap

Actuator, pressure hose

-

pressure chamber

Lamella element (27)

Lamella element (26)

stamp

ram head

Flange (40)

printing plate

Spring element, disc spring package

pressure connection

-

pressure chamber

fixing screw

supply

-

inking

Adjustable roller

Roller, fixed to the frame

-

pressure chamber pressure chamber

pressure chamber

-

pressure chamber

roller strip

-

inking

Roller, anilox roller

Cylinder, forme cylinder

Single drum roller, upper

-

Roller, ink transfer roller

Roller, inking roller

Single drum roller

-

Roller, ink transfer roller

Roller, inking roller

frame

Force vector, weight force

Force vector, contact pressure

actuator; pressure chamber

- 86 force vector, setting force

87 Force vector, setting force

88 resultants

89 radial force

90 -

91 radial force

92 force vector, adjusting force

93 actuator; pressure chamber

94 actuator; pressure chamber

95 -

96 radial force

97 radial force

98 force vector, setting force

08a roller, dampening roller

08b roller, dampening roller

08c roller, dampening roller

08d roller, dampening roller

α, α1, α2 opening angle between radial forces ß opening angle between contact forces γ1, γ2 opening angle between a radial force and a resultant

Claims

Expectations

1. Device for setting one of a first roller (08a; 08c; 14; 15; 18; 19; 52; 71; 73; 76; 78) at least on a second roller (08b; 16; 17; 54; 72; 77 ) pressure applied in a printing press (82) and / or for turning a first roller (08a; 08c; 14; 15; 18; 19; 52; 71; 73; 76; 78) on or by at least a second one Roller (08b; 16; 17; 54; 72; 77), whereby for the first roller (08a; 08c; 14; 15; 18; 19; 52; 71; 73; 76; 78) at least two actuators (83; 84 ) are provided, which in their actuated operating state exert a radial force (89; 91) directed into the first roller (08a; 08c; 14; 15; 18; 19; 52; 71; 73; 76; 78), characterized in that that in the opposite direction of the radial force (89;

91) a spring element is provided.

2. Device for setting a contact pressure (81; 82), the first roller (08a; 15; 18; 71) and a second roller (08c; 14; 19; 72) on at least one third roller (02; 08b; 16 ; 17; 67) in a printing press, and / or for turning on / off a first roller (08a; 15; 18; 71) and at least one second roller (08c; 14; 19; 72) on or from one third roller (02; 08b; 16; 17; 67), with actuators (83; 84; 93; 94) for the first roller (08a; 15; 18; 71) and the second roller (08c; 14; 19; 72) ) are provided which exert a radial force (89; 91; 96; 97) in their actuated operating state, each in the roller (08a; 08c; 14; 15; 18; 19; 71; 72) that is operatively connected to them. is characterized in that an opening angle (α1; α2) between the radial forces (89) directed by two actuators (83; 84) directed onto the same roller (08a; 08c; 14; 15; 18; 19; 71; 72) ; 91) for the first roller (08a; 15; 18; 71) and the second roller e (08c; 14; 19; 72) is the same.

3. Device for setting a contact pressure (81; 82), the first roller (08a; 15; 18; 71) and a second roller (08c; 14; 19; 72) on at least a third Exercise roller (02; 08b; 16; 17; 67) in a printing press, and / or for turning on / off a first roller (08a; 15; 18; 71) and at least a second roller (08c; 14; 19; 72) to or from a third roller (02; 08b; 16; 17; 67), with actuators (for the first roller (08a; 15; 18; 71) and the second roller (08c; 14; 19; 72) 83; 84; 93; 94) are provided, which exert a radial force (89; 91; 96; 97) in their activated operating state, each in the roller (08a; 08c; 14; 15; 18 ; 19; 71; 72), characterized in that the radial forces (89; 91; 96; 97) of the actuated actuators (83; 84; 93; 94) form an opening angle (α1; α2) with each other that is not equal is an opening angle (β) which the contact pressure (82) exerted by the first roller (08a; 15; 18; 71) on the third roller (02; 08b; 16; 17; 67) corresponds to that of the second roller (08c ; 14; 19; 72) on the third roller (02; 08b; 16; 17; 67) press force (81) forms.

4. Device according to one of the preceding claims, characterized in that the actuators (83; 84; 93; 94) actuated by a control signal exert a radial force (89; 91; 96; 97).

5. Device according to one of claims 2 to 4, characterized in that the opening angle (α; α1; α2), which the radial forces (89; 91) of the actuated actuators (83; 84) form together, between 45 ° and 135 ° is.

6. Device according to one of claims 2 to 5, characterized in that the opening angle (β), which from the first roller (08a; 15; 18; 71) to the third roller (02; 08b; 16; 17; 67 ) applied contact pressure (82) with the contact pressure (81) exerted by the second roller (08c; 14; 19; 72) on the third roller (02; 08b; 16; 17; 67) is between 30 ° and 180 ° ,

7. Device according to one of the preceding claims, characterized in that the first roller (08a; 15; 18; 71) and / or the second roller (08c; 14; 19; 72) are each held in a roller holder (27), which in turn is mounted in a frame holder (26).

8. Device according to one of the preceding claims, characterized in that the actuators (83; 84; 93; 94) are arranged between the frame holder (26) and the roller holder (27).

9. Device according to one of the preceding claims, characterized in that the frame holder (26) is designed as a housing in which the actuators (83; 84; 93; 94) are arranged.

10. Device according to one of the preceding claims, characterized in that the housing is at least half-shell.

11. Device according to one of the preceding claims, characterized in that the actuators (83; 84; 93; 94) are designed as a pressurizable hollow body.

12. Device according to one of the preceding claims, characterized in that the hollow body can be actuated pneumatically.

13. Device according to one of the preceding claims, characterized in that the hollow body is designed without piston rods.

14. Device according to one of the preceding claims, characterized in that the hollow body is at least partially formed from an elastomer material.

15. Device according to one of the preceding claims, characterized in that the first roller (08a; 15; 18; 71) or the second roller (08c; 14; 19; 72) is a roller of an inking unit or a dampening unit.

16. Device according to one of the preceding claims, characterized in that at least one of the adjustable or on / off rollers (08a; 08c; 14; 15; 18; 19; 71; 72) cooperates with a forme cylinder (02) Roller is.

17. Device according to one of the preceding claims, characterized in that all the rollers (08a; 18; 19; 71; 72) interacting with a forme cylinder (02) can be switched on or off.