EP1412185A1

EP1412185A1 - Method for engaging and disengaging cylinders

Info

Publication number: EP1412185A1
Application number: EP02767078A
Authority: EP
Inventors: Ralf Christel; Oliver Frank Hahn
Original assignee: Koenig and Bauer AG
Current assignee: Koenig and Bauer AG
Priority date: 2001-08-03
Filing date: 2002-08-02
Publication date: 2004-04-28
Also published as: CN1781703A; CN1531483A; US20040177778A1; WO2003013856A1; CN1302922C; US7011026B2; EP1412188A2; JP2004536734A; EP1412188B2; ATE460279T1; WO2003013857A2; WO2003013857A3; US20040231534A1; ES2338412T3; EP1412188B1; US7032510B2; JP4012503B2; DE50214268D1

Abstract

At least two cylinders of a printing machine are arranged in the printing machine. An end journal of each of the cylinders is mounted either in or on a common insert. That common insert is, in turn, detachably located in, or on a lateral frame of the printing machine.

Description

description

Procedure for starting and stopping cylinders

The invention relates to methods for turning cylinders on and off according to the preamble of claim 1, 3, 7, 8, 9 or 20.

EP 08 78 302 A1 discloses turning a cylinder on and off, the cylinder being regulated when pivoted by means of an eccentric such that adjacent cylinders do not perform any sliding movement. The pivoting movement of the cylinder by means of the eccentric is controlled in such a way that its rotation is accompanied by a rolling movement of an adjacent cylinder.

EP 08 62 999 A2 discloses a double printing unit with two transfer cylinders acting together, which are mounted in eccentric or double eccentric bushes for the purpose of turning them on and off. In another version, they are mounted in levers which are pivotally mounted eccentrically to the forme cylinder axis.

In US 58 68 071 A, for the purpose of turning the transfer cylinders on and off, they are mounted in slides which can be displaced linearly in the side frame along parallel directions of movement in linear guides having linear bearings.

The invention has for its object to provide methods for switching cylinders on and off.

The object is achieved by the features of claim 1, 3, 7, 8, 9 or 20.

The advantages that can be achieved with the invention are, in particular, that the method enables the possibility of safe and / or low-wear parking, in particular for a pressure drop in the event of a web break. An advantageous variant enables quick and safe printing shutdown without great technical effort.

The method is particularly suitable for printing units of a printing press, which, for. B. is compact, low-vibration and robust built by linear arrangement of the cylinders.

The minimization of the number of parts that can be moved in normal operation and during set-up, e.g. B. the absence of the movement of all cylinders when switching on and off, of frame walls, bearings etc., ensures the robust and cost-effective construction and operation.

With regard to a robust and simple construction, it is also advantageous if only the transfer cylinders have to be moved to turn the printing unit on and off. Although the forme cylinders can be mounted so that they can be adjusted at a distance from the associated transfer cylinder and, if necessary, the inking and, if available, dampening units, the transfer cylinders can be turned on and off from one another and from the assigned forme cylinders simply by moving the transfer cylinders.

A linear movement of the cylinders is made possible by a movement specially selected in the area of the pressure point and at the same time avoiding devices and movements of the forme cylinders are avoided.

In one embodiment, the transfer cylinders, which are mounted, for example, in slides in linear guides in or on the side frame, are moved essentially perpendicular to the plane of the cylinder axes for starting and stopping.

In another embodiment, the transfer cylinders are in levers for this purpose arranged, which are mounted eccentrically to the forme cylinder axis.

In a third embodiment, the transfer cylinders are mounted in double eccentric bushings, which, at least in the area close to the pressure point, enables an almost linear movement largely perpendicular to the plane of the cylinder axes.

In particular for washing, changing lifts, etc., cylinders or rollers in printing units of the “pressure on” operating state, ie a pressure on position, must be turned off and on again. The necessary radial movement of the rollers also contains a movement component in tangential direction, the size of which depends on the design (eccentric, lever, linear guide, as well as its angle to the nip point) of the adjusting device.If the speed of the effective outer surfaces in the nip point arises from the adjustment in relation to the operating state, this implies due to the Surface friction of the roller materials used is a tangential frictional force component which is opposite to the adjustment movement. The adjustment movement is thereby inhibited or its speed is limited. This is particularly important in the case of printing unit cylinders in the case of so-called "winders", since here the high pressure occurring occurs Large friction forces also result.

Therefore, in a method for turning cylinders on and off, it is advantageous to have a relative tangential speed in the area close to the contact, ie. H. in the area of the nip point of two interacting cylinders or rollers, by deliberately rotating or rotating at least one of the cylinders or rollers involved.

In addition to reducing the inhibition in the adjustment, an unnecessarily high load (friction, deformation) of the elevators and / or the outer surfaces of the cylinders or rollers involved is avoided.

Embodiments of the invention are shown in the drawings and are in following described in more detail.

Show it:

Figure 1 is a schematic representation of a double printing unit.

2 shows a schematic illustration of a three-cylinder offset printing unit;

Fig. 3 is a schematic representation of a double-wide double printing unit;

Fig. 4 is a schematic representation of a double-wide double printing unit, highly symmetrical;

FIG. 5 shows a schematic illustration of a double printing unit in section BB according to FIG. 1 with linear travel;

FIG. 6 shows a schematic representation of a double printing unit in section BB according to FIG. 1 with a curved adjustment path;

Fig. 7 is a schematic representation of an H-printing unit with linear travel and pairwise drive;

Fig. 8 is a schematic representation of an H-printing unit with a curved travel and paired drive;

9 is a side view of a linear guide for transfer cylinders;

10 shows a section through the linear guide according to FIG. 9.

A first printing unit 01 of a printing press, in particular one Rotary printing machine, has a first cylinder 02, z. B. a forme cylinder 02, and an associated second cylinder 03, z. B. a transfer cylinder 03, (Fig. 1).

The forme cylinder 02 and the transfer cylinder 03 have at least one malfunction, z. B. an interruption 04; 06 in the lateral surface effective when unrolling. This interruption 04; 06 can be a joint of a leading and a trailing end of one or more elevators, which are arranged on the circumference, for example by means of magnetic force or cohesively. However, as shown below in the exemplary embodiments, channels 04; 06 or slots 04; 06 act which pick up the ends of elevators. The channels 04; Faults designated 06 are synonymous with other interruptions 04; 06 on the effective surface area, d. H. the outward-facing surface of the cylinder 02; 03.

The forme cylinder 02 and transfer cylinder 03 each have at least two channels 04; 06 (or interruptions 03; 04 etc.). These two channels 04; 06 are each in the longitudinal direction of the cylinder 02; 03 one behind the other, and staggered in the circumferential direction.

Assign the cylinders 02; 03 only a length L02; L03, which essentially corresponds to two widths of a newspaper page, there are only two channels 04; 06 arranged.

Channels 04; 06 are so on the two cylinders 02; 03 arranged that when the two cylinders 02; 03 each on one of the channels 06; 04 of the other cylinder 03; 04 unroll. The offset of the channels is preferably 04; 06 each cylinder 02; 03 approx. 180 ° in the circumferential direction. Thus roll after each 180 ° rotation of the cylinder 02; 03 at least one pair of channels 04; 06 on each other, while on a longitudinal section a the cylinder 02; 03 the cylinders 02; 03 roll on each other undisturbed.

The transfer cylinder 01 of the first printing group 01 forms with a third cylinder 07; via a train 08; z. B. a printing material web 08, a printing point 09. This third cylinder 07 can be used as a second transfer cylinder 07 (FIG. 1) or as an impression cylinder 07 (FIG. 2), e.g. B. steel cylinders, or satellite cylinders 07.

Axes of rotation R02; R03; R07 of the three interacting cylinders 02; 03; 07 lie essentially in a common plane E during a print-on position AN and run parallel to one another (see FIGS. 5 and 6). If the satellite cylinder 07 has two printing points on its circumference, then a second printing unit, not shown, is preferably also arranged in the common plane E.

As shown in the exemplary embodiment according to FIG. 1, the third cylinder 07 designed as a second transfer cylinder 07 interacts with a fourth cylinder 11, in particular a second forme cylinder 11 with an axis of rotation R11, and forms a second printing unit 12. The two printing units 01; 12 form a printing unit 13 printing on both sides simultaneously on the web 08, a so-called double printing unit 13.

All axis of rotation R02; R03; R07; R11 of the four cylinders 02; 03; 07; 11 are now during pressing, i. H. in the pressure-on position AN in the common plane E and run parallel to one another.

In the case of the double printing unit 13 (FIG. 1), the cylinders 07; 11 of the second printing unit 12 channels 04; 06 with the properties described above for the first printing group 01 with regard to the number and that of the offset to one another. Channels 04; 06 of the four cylinders 02; 03; 07; 11 are now preferably arranged so that two Channels 04; 06 two interacting cylinders 02; 03; 07; 11 roll on top of each other.

In an advantageous embodiment, the forme cylinder 02 and the transfer cylinder 03 each have a length L02; L03, which are four or more widths of a printed page, e.g. B. a newspaper page, e.g. B. 1,100 to 1,800 mm, in particular 1,500 to 1,700 mm and a diameter D02; D03, e.g. B. 130 to 170 mm, in particular. 145 to 185 mm, the circumference of which corresponds essentially to the length of a newspaper page (FIGS. 3 and 4).

In an advantageous embodiment, each of the two cylinders 02; 03 two channels 04; 06, which each extend continuously at least over a length which corresponds to two widths of a newspaper page (FIG. 3).

Each cylinder 02; 03 but also more than two channels 04; 06 may be arranged. In this case, two channels 04; 06 in alignment, or alternately. However, for example with four channels 04; 06 the two the end faces of the cylinders 02; 03 adjacent channels 04; 06 in a common alignment, and the two “inner” channels 04; 06 in a common alignment, but offset in the circumferential direction from the former (FIG. 4).

Are the interruptions 04; 06 actually as channels 04; 06 or slots 04; 06, the channels 04; 06 a little longer than the width or double the width of the printed page. Possibly. they can have two channels 04; 06 also overlap slightly in the circumferential direction. This cannot be seen in such detail in FIGS. 1 to 4, which are only shown schematically.

With regard to the excitation or damping of vibrations caused by channel impact, it is particularly advantageous if the channels 04; 06 on the respective cylinder 02; 03; 07; 11 are offset from each other by 180 °. So they roll Channels 04; 06 between the forme cylinders 02; 11 and the transfer cylinders 03; 07 of the two printing units 01; 12 simultaneously and in the area of the same section in the longitudinal direction of the cylinders 02; 03; 07; 11 from; z. B. on the same page, e.g. B. a side I (Fig. 1, 3 and 4) of the double printing unit 13 in one stage of the cycle, and in the other phase on a side II, or with more than two channels 04; 06 per cylinder 02; 03; 07; 11, for example in the area of the center of the cylinder 02; 03; 07; 11th

The linear arrangement of the cylinders 02; 03; 07; 11 in a plane E, the offset arrangement of the channels 04; 06 and the unwinding of all channels 04; 06 in the manner described, the excitation of vibrations is significantly reduced. Due to the symmetrical and synchronous unwind on the two printing units 01; 12 there is a destructive interference of the excitations which occurs when the offset of the channels 04; 06 on the cylinders 02; 03; 07; 11 180 ° from the speed of the cylinders 02; 03; 07; 11 or the frequency takes place independently.

Are the interruptions 04; 06 actually as channels 04; 06 executed, so they are in an advantageous embodiment with a gap of small width, for. B. less than or equal to 3 mm, in the area of a lateral surface of the forme cylinder 02; 11 or transfer cylinder 03; 07 executed, which ends of one or more elevators, for. B. one or more blankets, on the transfer cylinder 03; 07 or ends of one or more elevators, e.g. B. one or more printing plates on the forme cylinder 02; 11 records. The elevator on the transfer cylinder 03; 07 is preferably designed as a so-called metal printing blanket, which has an ink-carrying coating on a metallic base plate. The bent ends are in the case of transfer cylinders 03; 07 for example by clamping and / or tensioning devices and in the case of forme cylinders 02; 11 by clamping devices in the channels 04; 06 held.

In each of the channels 06 of the transfer cylinder 03 there can be a single, continuous clamping and / or tensioning device or it can - in the case of more than several Newspaper page widths through channels - several clamping and / or tensioning devices can be arranged one behind the other in the longitudinal direction. The channels 04 of the forme cylinder 02 each also have, for example, one or more clamping devices.

Preferably, the forme cylinder 02; 11 and in the channels 06 of the transfer cylinder 03; 07 a "minigap technology" is used, in which a leading end is inserted into a narrow channel 04; 06 with an inclined leading hooking edge, the elevator is wound onto the cylinder 02; 03; 07; 11, the trailing end also in channel 04; 06 is inserted, and the ends are clamped against slipping out, for example by means of a rotating spindle or a pneumatic device.

However, it can also be used both for the elevator on the forme cylinder 02; 11, as well as for the elevator of the transfer cylinder 03; 07 a as a narrow slot 04; 06 executed channel 04; 06 be arranged without a clamping device, which receives the ends of the lifts. The ends are here, for example, by their shape and / or the geometry of the slot in slot 04; 06 held.

The transfer cylinder 03; 07 have z. B. in an advantageous embodiment (Fig. 3) only two, circumferentially offset by 180 ° to each other, each having at least one width which corresponds to two widths of a newspaper page. In this case, the elevators or channels 04 of the forme cylinders 02; 11 complementary to this and must either have, as shown, two continuous channels 04 each having a length of two newspaper page widths, or alternatively pairs of adjacent channels 04 arranged in alignment, each with a length of a newspaper page width. In the former case, each interruption 04 of the forme cylinder 02; 11 in an advantageous embodiment, two clamping devices each of a length which essentially corresponds to a width of a newspaper page. The forme cylinder 02; 11 are in an advantageous embodiment with four in the longitudinal direction of the forme cylinder 02; 11 adjacent to each other bendable lifts occupies, which have a length in the circumferential direction of a little over the length of the printed image of a newspaper page, and in the longitudinal direction a width of about a newspaper page. With the arrangement of continuous channels 04 and only one clamping device per channel 04; 06, which has a length of two widths on one newspaper page, it is also possible to mount lifts with a width of two newspaper pages, so-called panorama printing plates.

For printing units 01; 12, for which a need to equip with panoramic printing plates can be excluded, an arrangement can also be advantageous, wherein the "outer" elevators adjacent to side I and the side II and II are aligned and the "inner" elevators are aligned and closed the former are arranged offset by 180 ° (Fig. 4). This highly symmetrical arrangement additionally reduces or prevents the risk of vibration excitation in plane E, which is caused by the non-simultaneous passage of channels 04; 06 on page I and page II. This also alternately tensioning and relaxing the web 08 alternately on side I and side II, and the resulting vibration of the web 08 can thereby be avoided.

The linear arrangement of the cylinders 02; 03; 07; 11 and the arrangement of the interruptions 04; 06 on the respective cylinder 02; 03; 07; 11 and between the cylinders 02; 03; 07; 11 are in training also particularly on cylinder 02; 03; 07; 11 apply, which have a length L02; L03, which corresponds essentially to six times the width of a newspaper page. In this case, however, it can be advantageous to transfer cylinders 03; 07 and / or the forme cylinders 02; 11 with a diameter D02; D03 to be carried out, which results in a volume which is substantially twice the length of a newspaper page. For the purpose of technically simple and robust design of the double printing unit 13, the forme cylinders 02; 11 in an advantageous embodiment with respect to their axes of rotation R02; R11 fixed. For the purpose of turning the printing units 01; 12 are the transfer cylinders 03; 07 with respect to their axes of rotation R03; R07 are designed to be movable and are at the same time from the associated forme cylinder 02; 11 and of the cooperating transfer cylinder 03; 07 can be switched off or adjusted to this. In this embodiment, only the transfer cylinders 03; 07 moves while the forme cylinder 02; 11 remain in their fixed, possibly previously adjusted position. For the purpose of adjustment, the forme cylinders 02; 11 however in appropriate devices, e.g. B. in eccentric or double eccentric bushings, in linear guides or in levers.

The transfer cylinder 03; 07 can, as shown schematically in FIGS. 5 and 6, be movable along a linear actuation path 16 (FIG. 5) or along a curved actuation path 17 (FIG. 6). Travel 16 and 17 and the transfer cylinder 03; 07 in a print-down position AB are shown in dashed lines in FIGS. 3 and 4.

The linear adjustment path 16 can take place by means of linear guides, not shown in FIG. 5, which are arranged in or on the side frame, also not shown in FIG. 5. For the purpose of robust and low-vibration construction, the bearing in a linear guide is preferably on side I and on side II of the double printing unit 13.

Also shown schematically in FIG. 6 is a lever 18 in which one of the transfer cylinders 03 is pivotally mounted about a pivot axis S. The pivot axis S is preferably in the plane E. In an advantageous embodiment, the lever 18 has a length between the mounting of the axis of rotation R03; R07 of the transfer cylinder 03; 07 and the pivot axis S, which is larger than the distance of the axis of rotation R03; R07 of the transfer cylinder 03; 07 from the axis of rotation R02; R11 of the associated forme cylinder 02; 11 in print-on position ON. This means that those working together are switched off at the same time Transfer cylinder 03; 07 and the associated forme cylinder 02; 11, and vice versa for queuing. However, the pivot axis S can also be eccentric to the axis of rotation R02; R11 of the associated forme cylinder 02; 11, e.g. B. be arranged at a distance from the plane E. The storage in a lever 18 is preferably carried out on side I and on side II of the double printing unit 13.

In a further embodiment, not shown, the actuating path 16; 17 by the storage of the transfer cylinder 03; 07 generated in eccentric bushings, not shown, especially in double eccentric bushings. With double eccentric bushings, a largely linear adjustment path 16 can be generated in the area of the pressure-on position AN, but in the area further away from the pressure point 09, if necessary, a curve-shaped adjustment path 17 can be generated, which means that the transfer cylinder 03; 07 from the cooperating transfer cylinder 07; 03 as from the associated forme cylinder 02; 11 or vice versa allowed. The storage on side I and on side II of the double printing unit 13 is also advantageous for the use of eccentrics.

5 and 6, the course of the web 08 is shown by the pressure point 09 located in the print-on position ON. The plane E of the double printing unit 13 and the plane of the web 08 intersect in an advantageous embodiment at an angle α of 70 ° to 85 °, in particular 75 ° to 80 °. Assign the transfer cylinder 03; 07 has a circumference which corresponds to the length of approximately one newspaper page, the angle α is preferably approximately 75 °, the transfer cylinders 03; 07, however, has a circumference which corresponds approximately to the length of two newspaper pages, the angle α should preferably be selected at approximately 83 °. This choice of the angle α contributes to the safe and quick release of the web 08 and / or the parking cylinders 03; 07 from each other with minimized travel 16; 17 calculation, and on the other hand minimizes negative influences on the printing result, which are caused by the extent of a partial wrapping of the transfer cylinder 03; 07 is significantly influenced (duplication, lubrication, etc.). With an optimized arrangement, the required linear travel 16 of each transfer cylinder 03; 07 less than or equal to 20 mm.

At least one of the transfer cylinders 03; In one advantageous embodiment, 07 can be switched off to such an extent that the web 08 drawn in can be guided through the printing point 09 without contact during printing operation by means of other printing units.

The double printing unit 13 is multiple, as shown in FIGS. 7 and 8, for example twice, in a printing unit 19, for. B. a so-called. H-printing unit 19, can be used in a common side frame 27. In FIGS. 7 and 8, the separate designation of the parts which are the same as the upper double printing unit 13 for the double printing unit 13 located below is omitted. If all cylinders 02; 03; 07; 11 with a circumference, which corresponds essentially to the length of a newspaper page, can be used in terms of installation space, ie. H. save at a height H of the printing unit 19. Of course, this also applies to individual printing units 01; 12, for double printing units 13 and for printing units configured differently, which several printing units 01; 12 have. However, instead of saving on height H, the priority can also be achieved if the cylinders 02; 03; 07; 11, e.g. B. for the purpose of changing lifts, cleaning and washing, maintenance, etc., lie.

The pressure on or off position ON; AB is shown exaggerated in all figures for clarity. 7 indicates the transfer cylinders 03; 07 in a second possible position along the linear adjustment path 16, with here, for example, the upper double printing unit 13, e.g. B. for the purpose of printing form change, in the print-down position AB, and the lower double printing unit 13, z. B. is operated for the purpose of continued production, in the print-on position AN. FIG. 8 shows the relationships from FIG. 7 for the curved travel 17.

In an advantageous embodiment, each of the printing units 01; 12 at least one of its own drive motors 14, however only indicated by dashed lines in FIGS. 7 and 8, for the rotary drive of the cylinders 02; 03; 07; 11 on. In an embodiment shown schematically in FIG. 7, this can be a single drive motor 14 for the respective printing group 01; 12, which in this case, in an advantageous embodiment, is initially placed on the forme cylinder 02; 11 drives, and from there via a mechanical drive connection, for. B. spur gears, timing belts, etc., on the transfer cylinder 03; 07 is driven. However, for reasons of space and torque flow, it can also be advantageous to move the drive motor 14 to the transfer cylinder 03; 07 and from there to the forme cylinder 02; 11 to drive.

A high degree of flexibility in the various operating situations such as production printing, registration, elevator change, washing, web feed etc. has the design of the printing unit 01; 12 with its own drive motor 14, which is mechanically independent of the other drives, per cylinder 02; 03; 07; 11 (Fig. 8, dashed lines).

For special needs, for example for only one-sided imprinter operation or just a requirement to change the relative angle of rotation of the forme cylinders 02; 11 to each other, a drive is also possible, one of the forme cylinders 02; 11 of a printing group 01; 12 its own drive motor M, and the remaining cylinders 02; 03; 07; 11 of the printing group 01; 12 have a common drive motor 14.

The type of actuating movement and the drive from FIGS. 7 and 8 are each shown as examples and can therefore be transferred to the other examples.

In an advantageous embodiment, the drive motor 14 drives coaxially between the axis of rotation R02; R03; R07; R11 and motor shaft, possibly with an angle and / or offset compensating coupling. If a "co-movement" of the drive motor 14 or a flexible coupling between the drive motor and the cylinder 02; 03; 07; 11 which may have to be moved is to be avoided, it can also take place via a pinion. Should the transfer cylinder 03; 07 driving drive motor 14 are carried during the actuating movement, this can also be in a further development on a corresponding guide, for. B. be carried on an outside of the side frame 27.

In a development of the invention, it is advantageous if the respective forme cylinder 02; 11 assigned inking unit 21 and, if present, the assigned dampening unit 22 is rotatably driven by a drive motor which is independent of the drive of the printing unit cylinders. In particular, the inking unit 21 and any dampening unit 22 which may be present can each have their own drive motor. In the case of an anilox inking unit 21, the anilox roller can be, and in the case of a roller inking unit 21, the distribution cylinder or cylinders can be rotated individually or in groups. The one or more distribution cylinders of a dampening unit 22 can also be driven in rotation individually or in groups.

9 and 10 show an exemplary embodiment for realizing the linear adjustment path 16 by means of a linear guide.

The pin 23 of at least one of the transfer cylinders 03; 07 are, for example, rotatably mounted in radial bearings in bearing housings 24 designed as slides 24 (in FIGS. 9 and 10 only the arrangement in the region of one end face of the cylinders 02; 03; 07; 11 is shown). The bearing housing 24 or slide 24 can be moved in linear guides 26 which are connected to a side frame 27.

In an advantageous embodiment, the linear guides 26 are oriented almost perpendicular to the plane E. In a preferred embodiment, two linear guides 26 are provided for guiding each bearing housing 24 or slide 24, which run parallel to one another. The linear guides 26 of two adjacent transfer cylinders 03; 07 preferably run parallel to one another. In an embodiment not shown, the linear guides 26 can be arranged directly on walls of the side frame 27, in particular on walls of openings in the side frame 27, which are almost perpendicular to the end face of the cylinders 02; 03; 07; 11 run.

In the embodiment shown in FIGS. 9 and 10, the side frame 27 has an insert 28, z. B. a so-called. Bell 28 on. The linear guides 26 are arranged on or in this bell 28.

In an advantageous embodiment, the bell 28 has an area which extends in the direction of the cylinder 02; 03; 07; 11 emerges from the alignment of the side frame 27. The linear guides 26 are arranged in or on this area of the bell 28.

The distance between the two opposite side frames 27 (only one shown) is oriented i. d. Usually the broadest aggregate, e.g. B. on the wider inking unit 21, and usually causes a correspondingly longer pin on the cylinders 02; 03; 07; 11. Advantageous at the above The arrangement is that the pins of the cylinders 02; 03; 07; 11 can be kept as short as possible.

In a further development, the bell 28 has a cavity 29, which is arranged at least partially at the level of the side frame 27. As shown schematically in FIG. 10, the rotary drives of the cylinders 02; 03; 07; 11 with the pins of the cylinders 02; 03; 07; 11 connected.

Particularly advantageous if the cylinders 02; 03; 07; 11 can also drive connections such. B. each cooperating spur gears between the forme cylinder 02; 11 and the respectively assigned transfer cylinder 03; 07 be arranged. The paired drive can in this case preferably via the forme cylinder 02; 11 on the transfer cylinder 03; 07 done. As required However, the drive can also be operated via the two transfer cylinders 03; 07 on the forme cylinder 02; 11 done.

If lubrication, for example an oil chamber, is required, the cavity 29 can be limited in a simple manner by means of a cover 31 (dashed lines) without this increasing the width of the machine or protruding from the side frame 27.

The arrangement of the bell 28 thus shortens the length of the pins, which results in a reduction in the vibration, and enables a simple and variable construction, which is suitable for a wide variety of drive concepts and, with the same construction, allows the change between the concepts.

The drive of the respective bearing housing 24 or slide 24 in the linear guides 26 is preferably carried out by means of a screw drive, for. B. a threaded spindle which is driven by an electric motor. The electric motor can be regulated with respect to a rotational position.

A drive of the bearing housing 24 by means of a lever mechanism and an electric motor is also possible. If the lever mechanism is driven by means of one or more cylinders to which pressure medium can be applied, the arrangement of a synchronizing spindle which synchronizes the actuating movement on the two sides I and II is advantageous.

With the measures set out in the exemplary embodiments, it is possible to print a printing unit 01; 12 with long, slim cylinders 02; 03; 07; 11, which have a ratio of diameter to length of approx. 0.08 to 0.16, can be built and operated in a robust and low-vibration manner, while at the same time requiring little space, operation and frame construction. This applies in particular to printing units 01; 12 "simple circumference", ie with a newspaper page on the circumference, but with double width, ie with four newspaper pages on the length of the cylinders 02; 03; 07; 11 robust and low-vibration to operate, while at the same time requiring little space, operation and frame construction.

Turning the printing unit 01; 12; 13 is done as follows:

Starting from the print-down position AB, e.g. B. both transfer cylinders 03; 07 these are placed either simultaneously or one after the other at the printing point 09. The parking is done in the opposite way to the illustration below.

Moving the transfer cylinder 03; 07 takes place simultaneously and synchronously in the first embodiment of the z. B. linear printing unit 01 along a linear travel path 16 or along a curved travel path 17th

If the setting of the two transfer cylinders 03; 07, at least in the area close to the contact, at least two of the four cylinders 02; 03; 07; 11 rotated or subjected to a rotary movement. The two transfer cylinders 03; 07 or a forme cylinder 02; 11 and the transfer cylinder 07; Be 03. In an advantageous embodiment, however, all four cylinders 02; 03; 07; 11 are rotated during the positioning. The latter has the advantage that the cylinders maintain their relative angular position with respect to one another and, if channels are present, the relative position of the same remains in the circumferential direction. In an advantageous embodiment, the cylinders 02; 03; 07; 11 not by means of auxiliary drives, but by means of their angle-controlled drive motors 14, possibly in pairs via drive coupling. In one embodiment, the cylinders 02; 03; 07; 11 in pairs on the forme cylinders 02; 11 driven, a mechanical drive connection, for. B. gear engagement between transmission cylinder 03; 07 and associated forme cylinder 02; 11 along the entire travel path 16; 17 remains. The paired drive can, however, also on the transfer cylinder 03; 07 and from there to the respective forme cylinder 02; 11 be driven.

Turning the cylinder 02; 03; 07; 11 takes place in such a way that the transfer cylinders 03; 07 largely without a relative speed between the contacting outer surfaces of the cylinders 02; 03; 07; 11, between the associated forme cylinders 02; 11 and the cooperating transfer cylinder 07; 03 screw in or that they are screwed in. When parking, there is a corresponding unscrewing

This rotary movement is preferably carried out in such a way that, for. B. a current setpoint for the angular position control of the drive motors an offset depending on the status or the speed of the actuating movement, z. B. is added as an angular velocity or as an angle setpoint.

Rotates the printing unit 01; 13, for example at production speed, is used to turn off the double printing unit 13 depending on the transport direction of the web 08, and depending on whether the transfer cylinders 02; 11 to the same or in the opposite direction, which adds the value for the rotary movement corresponding to the turning movement, subtracts each, or adds on one side and subtracts on the other side.

In the linear version of the double printing unit 13 in particular (e.g. FIG. 7), the amount of the relative speed (angular position or speed) resulting from the stopping in the case of the transfer cylinder 07, the movement of which during the stopping is a component in the transport direction of the web 08 has, subtracted, while it is added in the case of the transfer cylinder 03, the movement of which has a component antiparallel to the transport direction of the web 08 when it is parked.

For the employment of the double printing unit 13 on a web running at production speed 08, for. B. after a flying plate change or as an impression, are Apply conditions accordingly to the relative speed resulting from the queuing. The amount of the relative speed resulting from the positioning (angular position or speed) is added in the case of the transfer cylinder 07, the movement of which has a component antiparallel to the transport direction of the web 08 when it is positioned, while in the case of the transfer cylinder 03, the movement thereof when the position is applied has a component in the transport direction of the web 08, is subtracted.

If the starting and stopping takes place with the web 08 at rest, the amounts mentioned are added to the production speed now zero or to a constant setpoint for the angular position.

In a variant, the two transfer cylinders 03; 07 one after the other, wherein when the first of the two transfer cylinders 03; 07 at least the associated forme cylinder 02; 11 or the transfer cylinder 03; 07 or the two assigned cylinders 02; 03 or 07; 11 experience a corresponding rotation. When the second transfer cylinder 07; 03 either the transfer cylinder 07; 03 or the other three cylinders 02; 03; 07; 11 or all four cylinders 02; 03; 07; 11th

However, advantageous in the event that one of the forme cylinders 02; 11 (or a pair) is rotated, it is the other forme cylinder 11; 02 (or the other pair) with to avoid previous or subsequent registration. To shift in the rolling of the cylinder 02; 03; 07; 11 with respect to channels 04; To avoid 06, it is advisable to set all cylinders 02; 03; 07; 11 to each other so that a relative speed on the outer surface of the interacting cylinders 02; 03; 07; 11 is almost zero.

Is the cylinder 02 turning; 03; 07; 11 and the travel path 16; 17 exactly reproducible when switching off and on, so it is not possible to turn simultaneously Cylinder 02 directly involved in starting and stopping; 03; 07; 11 are omitted for the purpose of registration and rolling.

In general, in the first exemplary embodiment, cylinders 02; 03; 07; 1 1 or rolling can be realized by coupling the adjustment movement (s) and the rotary drives by using individual cylinders 02; 03; 07; 11 or rollers of a cylinder or roller arrangement, depending on the type of adjustment movement (s), are subjected to torque (s) or rotary movement (s) in such a way that the torque (s) resulting from this / these in the nip point (s) n) resulting frictional force (s) support the adjustment movement (s) or do not hinder it or at least reduce the opposing frictional forces. In a particularly advantageous embodiment, the torque (s) of the drive (s) are then selected as a function of the type of adjustment movement such that the adjustment movement does not result in a relative speed difference between the effective lateral surfaces in the nip point. Since friction forces the elevators on the cylinders 02; 03; 07; 11 or rollers, but also the web 08 passing the nip point, this design is particularly gentle on the material. Ideally, the cylinder (s) 02; 03; 07; 11 generally rotated in such a way that its surface speed is reduced to zero relative to the path 08. This embodiment variant enables a defined angular position of the cylinders 02; 03; 07; 11 or rollers to produce each other.

If a particularly fast adjustment is to be realized, the torques of the roller drives can also be selected such that the frictional forces that arise solely through the adjustment movement are overcompensated, so that the frictional force additionally supports the movement. This variant is with regard to an emergency stop, e.g. B. caused by a broken web and possibly a winder

In a further embodiment, the drives are switched torque-free at the start of the movement. In this case, the rotation or the application of a rotary movement of the cylinders 02; 03; 07; 11 or the rollers themselves generated by the friction forces resulting from the adjustment of the nip points. The advantage of this solution lies in the simple feasibility and the avoidance of errors when turning the cylinder 02; 03; 07; 11. After the torque has been restored and, if necessary, the cylinders 02; 03; 07; 11 to one another, there may be a deviation in the relative angular position to one another. However, this deviation is corrected in pairs or individually during the first revolutions by means of the angle-controlled drive motors 14, and the relative angular position is returned to the target values.

In a third exemplary embodiment for the starting and stopping, a time ramp is specified for the relative angle of rotation position. That is, the cylinder 02; 03; 07; 11 or the pair undergoes a rotation according to a function as a function of time, and not as a direct function of a position or angle measurement of the actuating movement. The rotary movement or the addition / subtraction is triggered, for example, by the actuating command which causes the switching on and off.

For the method, in particular according to the first and third exemplary embodiments, z. B. the transfer cylinder 03; 07 moves and is subjected to the described, the movement compensating rotary movement of a certain angular velocity or peripheral speed. A further development is advantageous, according to which the transfer cylinder 03; 07 with this angular velocity or peripheral velocity of the forme cylinder 02; 11 is subjected to an essentially double circumferential speed (ie double angular speed for the same extent). In the case of individually driven cylinders 02; 03; 07; 11, the drive motors 14 are then controlled or regulated accordingly. In the case of paired drive of the form and transfer cylinder 02; 03; 07; 11, it is advantageous if the drive coupling, which is designed, for example, as a gearwheel connection, always remains in engagement when starting or stopping. The forme cylinder 02; 11 stationary, while the transfer cylinder 03; 07 is moved. Is the paired drive on the forme cylinder 02; 11, the applied angular velocity on the forme cylinder 02; 11 be substantially twice as large as the correction of the transfer cylinder 03; 07 compared to train 08 required.

In one embodiment of the printing unit 13, with all four cylinders 02; 03; 07; 11 in drive connection with each other, e.g. B. over gears, it is advantageous if the drive connection between the transfer cylinders 03; 07 always remains engaged when switching on and off. The transfer cylinder 03; 07 are then subjected, for example, to an angular speed which compensates for the relative speed during the setting-off or setting-in process to the web 08, while the forme cylinders 02; 11 with the substantially double amount of the resulting peripheral speed (i.e. double angular speed with the same circumference). The drive can be driven by a drive motor 14 on one of the cylinders 02; 03; 07; 11 directly or via a gear. In the control of the speed and / or angle of rotation position, however, as above, it must be taken into account whether the drive motor is initially on a form cylinder or a transfer cylinder 02; 03; 07; 11 drives.

The mentioned and also by simple transfer of the principle modified design variants for the procedures for turning on / off are also for different types of printing units, eg. B. non-linear bridge printing units, u- or n-printing units, satellite printing units, printing units for direct printing and all other printing units or units can be used in an advantageous manner, in which one or more cylinders are to be adjusted.

LIST OF REFERENCE NUMBERS

01 printing unit

02 cylinders, form cylinders

03 cylinder, transfer cylinder

04 break, channel, slot

05 -

06 break, channel, slot

07 cylinders, transfer cylinders, impression cylinders, satellite cylinders

08 web, printing material web

09 pressure point

10 -

11 cylinders, forme cylinders

12 printing unit

13 printing unit, double printing unit

14 drive motor, angle-controlled

15 -

16 travel, linear

17 travel, curved

18 levers

19 printing unit, H printing unit

20 -

21 inking unit, anilox inking unit, roller inking unit

22 dampening system

23 cones

24 bearing housing, slide

25 -

26 linear guide

27 side frame

28 insert, bell 29 cavity

30 -

31 cover

E level

H height

M drive motor

S swivel axis

DOWN pressure-down position ON pressure-on position

a longitudinal section

D02 diameter D03 diameter

L02 length (02)

L03 length (03)

R02 axis of rotation

R03 rotation axis

R07 axis of rotation

R11 axis of rotation

I side

II side

α angle

Claims

Expectations

1. A method for parking a first cylinder (03; 07) from a path (08) carried out between it and a second cylinder (03; 07), at least one of the cylinders (02; 03; 07; 11) for parking along a path Travel (16; 17) is moved and a relative tangential speed between the web (08) and the lateral surface is compensated for in the area near the contact, characterized in that the parking of the first cylinder (03; 07) in the area near the contact with a movement component in parallel, and the second cylinder (03; 07) is switched off with a movement component antiparallel to a direction of transport of the web (08), and that simultaneously with the switching off, a current rotational speed of the first cylinder (03; 07) is reduced by an amount, and the second cylinder (03; 07) is increased by an amount.

2. The method according to claim 1, characterized in that a value corresponding to the amount of the resulting relative tangential speed for the speed or angular position in the case of the first cylinder (03; 07) is subtracted from the current speed or angular position, and in the case of the second cylinder (03; 07) is added to the current speed.

3. Method for positioning a first cylinder (03; 07) on a path (08) carried out between the latter and a second cylinder (03; 07), at least one of the cylinders (02; 03; 07; 11) being positioned along a path Movement path (16; 17) is moved and a relative tangential speed between the web (08) and the lateral surface is compensated in the area close to the contact, characterized in that the positioning of the first cylinder (03; 07) in the area close to the contact with a movement component antiparallel, and the second cylinder (03; 07) is set up with a movement component parallel to a transport direction of the web (08), and simultaneously with a current speed of the first cylinder (03; 07) is increased and the second cylinder (03; 07) is reduced.

4. The method according to claim 3, characterized in that a value corresponding to the amount of the resulting relative tangential speed for the speed or angular position in the case of the first cylinder (03; 07) is added to the current speed or angular position, and in the case of the second cylinder (03; 07) is subtracted from the current speed.

5. The method according to claim 1 or 3, characterized in that the current rotational speed or angular position is reduced or increased according to a function depending on the time.

6. The method according to claim 1 or 3, characterized in that the actuating movement of the two cylinders (03; 07) takes place in the area close to the contact in a substantially opposite direction.

7. A method for parking a first cylinder (03; 07) from a second cylinder (03; 07) interacting via a path (08), the first cylinder (03; 07) along a travel path (16; 17) from a Position between the second cylinder (03; 07) and a third cylinder (02; 11), in which axes of rotation (R02; R03; R07; R11) of the three cylinders (02; 03; 07; 11) in the pressure-on position (AN) lie in a common plane (E), is brought into a print-down position (AB), and at least in a region close to the contact, at least the first cylinder (03; 07) simultaneously with a relative tangential speed between the web ( 08) and the circumferential surface reducing rotary movement is applied.

8. A method for placing a first cylinder (03; 07) on a track (08) against a second cylinder (03; 07), the first cylinder (03; 07) along an actuating path (16; 17) in such a position between the second cylinder (03; 07) and a third cylinder (02; 11) is brought, in which axes of rotation (R02; R03; R07; R11) of the three cylinders (02; 03; 07; 11) in the pressure-on position (AN) in a common plane ( E), and at least in a region close to the contact, at least the first cylinder (03; 07) is simultaneously subjected to a rotary movement which reduces a relative tangential speed between the web (08) and the lateral surface.

9. A method for starting and stopping a first cylinder (03; 07) on or from a path (08) carried out between the latter and a second cylinder (03; 07), at least one of the cylinders (02; 03; 07; 11) for moving on and off along an actuating path (16; 17), characterized in that, at least for the period of the positioning, a drive connection transmitting the drive torque between the first cylinder (03; 07) and a cylinder ( 03; 07) rotationally driving drive motor (14) is interrupted.

10. The method according to claim 9, characterized in that the drive motor (14) is switched torque-free.

11. The method according to claim 1, 3, 7, 8 or 9, characterized in that the respective as a transfer cylinder (03; 07) executed first and second cylinder (03; 07), both along a linear travel path (16) on or be turned off.

12. The method according to claim 1, 3, 7, 8 or 9, characterized in that the respective as a transfer cylinder (03; 07) executed first and second cylinder (03; 07), in the print-on position (AN) to each other and each be placed on an associated forme cylinder (02; 11).

13. The method according to claim 1, 3, 7, 8 or 9, characterized in that the respective as a transfer cylinder (03; 07) designed first and second cylinder (03; 07) in the print-on position (AN) to each other that rotation axes are employed (R02; R03; R07; R11) of the two transfer cylinders (03; 07) and each associated forme cylinder (02; 11) lie in a common plane (E).

14. The method according to claim 12, characterized in that the transfer cylinder (03; 07) and the associated forme cylinder (02; 11) are each rotatably driven in pairs.

15. The method according to claim 12, characterized in that the transfer cylinders (03; 07) and the forme cylinders (02; 11) are each individually rotatably driven without a mechanical drive connection to another cylinder (02; 03; 07; 11).

16. The method according to claim 1, 3, 7, 8 or 9, characterized in that the first and the second cylinder (03; 07) are turned on or off simultaneously.

17. The method according to claim 1 or 3, characterized in that the respective transfer cylinder 03; 07) of the first and second cylinders (03; 07) is assigned a forme cylinder (02; 11) which at the same time has an essentially double value for increasing or decreasing its peripheral speed in comparison to the resulting increase or decrease in peripheral speed on Transfer cylinder (03; 07) is applied.

18. The method according to claim 17, characterized in that the increase or decrease on the transfer and associated forme cylinder (02; 03; 07; 11) is carried out by means of separate drive motors (14).

19. The method according to claim 17, characterized in that the increase or decrease on the transfer and associated forme cylinder (02; 03; 07; 11) via a drive connection which is always present during the on and off setting by a common drive motor (14).

20. A method for parking or turning on a transfer cylinder (03; 07) from or to a web (08) to be printed, the transfer cylinder (03; 07) moving along a travel path (16; 17) for turning it off or on and in the area close to the contact a rotary movement compensating a relative tangential speed between the web (08) and the lateral surface is applied, characterized in that a forme cylinder (02; 07) assigned to the transfer cylinder (03; 07) is simultaneously subjected to a rotary movement such that a the resulting change in the peripheral speed is essentially twice as large as the change in the peripheral speed resulting from the applied rotary movement on the transfer cylinder (03; 07).

21. The method according to claim 20, characterized in that the application of the rotary movement on the transfer and associated forme cylinder (02; 03; 07; 11) takes place in each case by means of its own drive motors (14).

22. The method according to claim 20, characterized in that the application of the rotary movement on the transfer and associated forme cylinder (02; 03; 07; 11) via a drive connection which is always present during the on and off setting by a common drive motor ( 14) takes place.

23. The method according to claim 20, characterized in that the axis of rotation of the forme cylinder (02; 11) remains stationary during the movement of the transfer cylinder (03; 07).