EP1776232A1

EP1776232A1 - Devices for receiving a cylinder of a printing unit and corresponding printing unit

Info

Publication number: EP1776232A1
Application number: EP05716949A
Authority: EP
Inventors: Ralf Christel; Oliver Frank Hahn; Karl Erich Albert Schaschek
Original assignee: Koenig and Bauer AG
Current assignee: Koenig and Bauer AG
Priority date: 2004-08-05
Filing date: 2005-03-08
Publication date: 2007-04-25
Also published as: US20080066637A1; DE102004038206A1; US7661360B2; WO2006015889A1

Abstract

The invention relates to a device for receiving a cylinder (02, 03) of a printing unit. Said device comprises a bearing block (16) having a rotary bearing (12) and being mobile along an adjustment path (S) in linear bearings. The bearing structure is configured as a bearing unit (06) that can be mounted as a whole and that comprises, in addition to the rotary bearing (12), the two interacting bearing elements (13, 14) that enable the relative movement of the bearing block (16).

Description

description

Devices for supporting a cylinder of a printing unit and printing unit

The invention relates to devices for supporting a cylinder of a printing unit and a printing unit according to the preamble of claim 1 or 3 or 12.

In offset printing units, the surface pressure required for ink transfer is achieved by pressing in an elastic medium (rubber coating, blanket, sleeve, etc.). For this purpose, a defined distance of the printing cylinder surfaces (printing position) is set in the assembly. For various reasons, it is necessary to make the cylinders contactless.

In web-fed rotary presses, the printing cylinders are held in the print-on position by stops in a geometrically defined position. To change the position of the cylinder centers, three-ring bearings with eccentric rings are used. By rotating the eccentric rings, the cylinder center is moved in the plane. This realization of the Exzenterverstellung with levers and pneumatic actuation has numerous disadvantages: on the one hand a restriction of space through synchronous spindles (page I / page II), etc. for each cylinder, on the other hand a high adjustment effort by an overdetermined system (stops on Sl and S2 coupled by synchronous spindle) and coupling the horizontal and vertical adjustment direction and the third a high assembly costs.

By WO 02/081218 A2 individual linear bearings for two each mounted in carriage transfer cylinder are known, wherein an actuator for the carriage can be designed as a cylinder can be acted upon with pressure medium. In order to define an end position for the transverse to the cylinder plane adjusting movement, an adjustable stop is provided. Positioning takes place via a bearing block on the block Lever mechanism, which z. B. is actuated by a hydraulic cylinder and synchronized by a synchronous spindle on both sides.

The invention has for its object to provide a compact storage unit of a printing cylinder and an easy-to-set printing unit.

The object is achieved by the features of claim 1 or 3 or 12.

The achievable with the present invention consist in particular that a compact linear bearing unit is created in which the adjustment is already integrated. As compact a design as possible and elimination of devices for the synchronization of the right and left bearing point or moving part (eg synchronous rod) creates more space for other components or new printing unit arrangements are made possible.

In particular, can be achieved by a Vorkomplettierung or pre-assembly of cylinder with storage a reduction in assembly time.

An embodiment of the invention is illustrated in the drawing and will be described in more detail below.

Show it:

Fig. 1 is a plan view of a double printing;

FIG. 2 shows a side view in section II-II through a bearing unit; FIG.

3 shows a schematic cross section through a storage unit; Fig. 4 is a side view of the side frame according to the section IV - IV;

5 is a side view in section V - V through a bearing unit in the version with worm drive.

6 shows a second section VI-VI of the bearing unit according to FIG. 5.

A printing machine, z. B. web-fed rotary printing press, in particular a multi-color web-fed rotary printing press, has a printing unit in which a material web, short web one or both sides can be printed. The printing unit has a printing unit 01 with at least one on / Abstellbaren cylinder 02; 03, here a double printing unit 01 for the two-sided printing in rubber-against-rubber operation, on. The double printing unit 01 - in the form of bridge or n-printing or even as a flat printing unit lying in a common plane axes of rotation - is here formed by two printing units, each one as a transfer cylinder 02 and a form of cylinder 03 formed cylinder 02; 03, z. B. printing cylinder 02; 03, and each having a not shown inking unit and in the case of wet offset printing additionally have a dampening unit. In each case between the two ÜbertragungszylinderrT02 a (double) pressure point is formed in Anstelllage.

Preferably, as a cylinder units 04 executed modules z. B. a cylinder 02; 03 with pin and a pre-assembled or pre-assembled on the pin (pre-tensioned and / or preset) storage unit 06 on. Storage unit 06 and cylinder 02; 03 get before the insertion into the printing unit their firmly defined position to each other and are collectively introduced into the printing unit.

In an advantageous embodiment, it is provided, the cylinder 02; 03 in storage units 06 on side frames 07; 08 rotatably store, which the escape of the side frames 07; 08 not penetrate and / or the cylinder 02; 03 with her bale including her Pin 09 a length L02; L03, which is less than or equal to a clear width L between the printing cylinder 06; 07 to both end faces supporting side frames 07; 08. When the Druckwβrkszylinder 02; 03 to both end faces supporting side frames 07, 08 are preferably not laterally so open side frames, so that the cylinder 02; 03 axially removed, but to side frames 07; 08 which in the axial direction at least partially overlap with the end face of the mounted cylinder 02; 03, ie the cylinder 02; 03, in particular its bearing (see below) is frontally through the two side frames 07; 08 at least partially enclosed.

Preferably, all four printing cylinder 02; 03 (but at least three) per end face own storage unit 06, in which the arrival / Abstellmechanismus or at least one the relative movement between frame-fixed and movable bearing part bewerkstellendes transmission 11 is already integrated. It is also possible for two out of three or three of the four cylinders 02; 03 the arrival / Abstellmechanismus having bearing units 14 and for the third and fourth cylinder 02; 03 bearing units be provided without on / off mechanism.

FIGS. 2 and 3 show a bearing unit 06 based on linear travel paths ^* in longitudinal and cross-section. The storage / retrieval mechanism or at least the transmission 11 integrating bearing unit 06 has in addition to a radial bearing 12, for example, a cylindrical roller bearing 12, for rotatably supporting the cylinder 02; 03 bearing means 13, 14 for a radial movement of the cylinder 02; 03 - to print on or print off - on. For this purpose, the bearing unit 06 (after mounting the cylinder unit 04 frame-fixed) carrier-resistant bearing elements 13 and the movable against these bearing elements 14. The carrier-fixed and movable bearing elements 13; 14 are as cooperating linear elements 13; 14 and formed together with corresponding sliding surfaces or rolling elements between them as a total of linear bearings 13, 14. The linear elements 13; 14 take z. B. in pairs a radial bearing 12 receiving Storage block 16, z. B. slide 16 between them. Bearing block 16 and the movable bearing elements 14 may also be made in one piece. The carrier-fixed bearing elements 13 are arranged on a support 17 (in Rg. 2 and three with a circular base), which in total with the respective side frame 07; 08 is connected or is. The carrier 17 may be executed base plate or enclosure (circular, rectangular or other basic shape), which, for example, at least on a drive side a recess 18 (dashed lines indicated) for the passage of a drive shaft of a cylinder pin 09, not shown. Also, the frame wall 07; 08 on the drive side preferably has a recess 19, in particular as a slot, or an opening 19 for a drive shaft, not shown, with the pin 09 rotatably connected to. On the opposite side of the drive side neither a recess 18 nor a recess 19 must be provided.

The formation of the linear bearings in such a way that the cooperating bearing elements 13; 14 both on the unit storage unit 06 - and not a part of the side frame 07; 08 of the printing unit - are provided, allows pre-assembly and pre-adjustment or adjustment of the bearing voltage. The advantageous arrangement of the two bearing block 16 encompassing linear bearings 13, 14 allows a backlash-free setting, as opposed to the two Linearlageri3, 14 in such a way that the bearing preload and the bearing forces an essential component in a direction perpendicular to the axis of rotation of the cylinder 02; 03 learn or record. The bearings are thus adjustable in the direction to which it is at play-free positions of the cylinder 02; 03 also arrives. The frame-fixed bearing elements 13 are arranged substantially parallel to each other and define a direction of adjustment S.

Since the cylinder 02; 03 together with pin 09 and bearing unit 06, the frame wall 07; 08 not penetrate, these are already preassembled and the bearings (radial bearings 12 and linear bearings 13, 14) preset or correctly biased as a module cylinder unit 06 used in the printing unit. Under the "non-penetration" and the above definition in Reference to the clear width is to be understood in the broader sense that at least in the region of the intended end position of the cylinder 02; 03 and at least on a continuous path from a frame edge to the location of the end position such a "non-penetration" is present, so that the cylinder unit 06 from an open, lying between the two front side frames 07, 08 without tilting, ie in one Position can be brought to the end position with the rotation axis perpendicular to the frame plane and arranged there between the two frame inner walls, in particular can be fastened to the frame inner walls.This is also possible, for example, if sprue pieces or other elevations are provided on the inside. a said continuous assembly path is provided, however.

For correct placement assembly aids, not shown, for. B. dowel pins in the side frame 07; Be provided 08, to which the bearing unit 06 of the fully assembled cylinder unit 04 is aligned, before being released by releasable retaining means, for. As screws, or even cohesively by welding to the side frame 07; 08 are connected. For the adjustment of the bearing preload in the linear bearings 13, which is to be carried out before insertion into the printing unit and / or post-insertion adjustment; 14 may not corresponding means, for. B. clamping screws may be provided. Preferably, the bearing unit 06 - at least to the cylinder side - protected by a cover, not shown, largely against contamination or even encapsulated executed as a unit.

Preferably for a modular design, the bearing units 06 for forming and transfer cylinders 02; 03 - if necessary, except for the permitted operational size of the travel - identical design. Due to the pre-assembled design, the effective inner surface of the radial bearing 12 and the outer effective lateral surface of the pin 09 can be cylindrical instead of tapered, since both the assembly of the bearing unit 06 on the pin 09 and the setting of the bearing clearance can still be done outside the printing unit. Preferably, a cylindrical shaft seat provided between pin 09 and radial bearing 12. The bearing unit 06 or the radial bearing 12 can be shrunk, for example, and the assembly of the preassembled cylinder unit 04 complete with storage in the side frame 07; 08 done. The bearing preload is achieved here by the fit of shaft seat roller bearing inner ring, and does not need during assembly of the cylinder 02; 03 can be set in the printing unit (time saved in the assembly).

The bearing unit 06, in particular linear bearing unit 06, thus has the movable part as the linearly movable carriage 16 (Führungsschlitteπ), which receives the radial bearing 12 and possibly a thrust bearing (eg., For side register adjustment of the cylinder 03), and a degree of freedom has perpendicular to the cylinder axis. The fixed part (carrier 17 with bearing elements 13) of the bearing unit 06 is on the frame inner side of the side frame 07; 08 attached, z. B. screwed.

In this fixed part of the bearing unit 06 a - in particular backlash-free or biased - gear 11 is integrated, which transforms a introduced from outside the storage unit 06 on a member of the transmission 11 adjusting movement in a linear movement of the carriage 16. Preferably, as indicated in Fig. 2, such a trained gear 11 is integrated, which is the rotational movement of an only schematically indicated adjusting 21 (adjusting means 21) via, for example, a shaft 22 in a linear movement of the carriage perpendicular to the shaft 22 and axis of the adjustment and / or perpendicular to the cylinder axis converts. This gear 11 may include, for example, a driven by the shaft 22 rotating gear, which cooperates with a the movable part associated rack. However, it can also be carried out in other ways. The adjusting drive 21 is preferably designed as a rotary drive (manually or preferably as an electric motor, in particular remote-controlled). This is advantageous on the rear side of the storage unit 06, in particular on the side facing away from the storage unit 06 side of the side frame 07; 08 (mounting surface to the frame) arranged, z. B. flanged. The axis of rotation of the adjusting drive preferably runs substantially parallel, but offset from the cylinder axis.

In Fig. 5 and 6 is an advantageous alternative embodiment to o. G. Rack solution shown:

Again, a rotary actuator 21, z. B. a stepper motor 21, is provided. Preferably with respect to a synchronous movement between the two end-side side frames 07; 08 are each a stepper motor 21 is provided for the two bearings of the respective cylinder. In an advantageous embodiment, an unillustrated matching gear, z. B. as an attached planetary gear in front of the actuator 21, is provided. The rotational movement of the actuator 21 in the linear motion converting gear 11 has a (in particular self-locking) angle gear 23, 24, z. B. a worm gear from a non-rotatably connected to shaft 22 worm shaft 23 and a cooperating worm wheel 24. The worm wheel 24 is non-rotatably connected to a stationary, but rotatably mounted in the bearing unit 06 threaded spindle 26, which in turn cooperates with an internal thread having a screw jack 27. The Spindelhubelement 27 is connected to the concealed in Rg. 6 carriage 16 rigid or via a driver such that the "" carriage 16, preferably without play, the movement of the Spindelhubelementes 27 with respect to the direction of adjustment S follows. The advantage here is the design as a self-locking worm gear, as a result, the axes of the shaft 22 and the linear travel of the orthogonal to each other. The threaded spindle 26 and the screw jack 27 comprehensive conversion gear 26, 27 (rotational - linear) may preferably be biased and / or formed as a ball screw.

Both the angle gear 23, 24 and the transfer gear 26, 27 are completely integrated in the bearing unit 06.

The space should preferably smaller in cross-section or at most equal to the Cross-sectional area of the cylinder 02; 03 (or, if present, a bearer ring diameter):

In a first variant, at least one of the two dimensions of length L and / or B (referred to here as edge dimension) should be smaller or highest equal to the diameter D of the cylinder 02; 03 (or Schmitzringes, if available). In one embodiment, wherein the adjustment direction S substantially with a connection plane of the axes of rotation of the cylinder to be set against each other 02; 03 coincides, at least the length L should be less than or equal to the diameter D. In contrast, in one embodiment, wherein the adjustment direction S is substantially perpendicular to the connection plane of the axes of rotation, at least the width B should be less than or equal to the diameter D. In an even more advantageous variant, the bearing unit 06 should be dimensioned such that the bearing unit 06 does not exceed the cross-sectional area of the cylinder 02 in its dimension. 03, d. H. that the maximum diagonal e (referred to here as a corner measure) is smaller or at most equal to the diameter D, d. H. e≤D.

The length L and / or width B is preferably less than or equal to 300mm, preferably the maximum diagonal e is less than or equal to 300mm. In an even more advantageous, because more variable embodiment, the length L and / or width B is less than or equal to 200mm, or even less than or equal to 150mm. The latter is particularly advantageous in connection with cylinders 02; 03 of a circumference that corresponds to only one newspaper page (single circumference cylinder).

Advantageously, a force measurement is integrated in the context of storage or the drive by, for example, the current consumption of the motor 21 or a moment in the transmission, for. B. or the torsional moment of the spindle, etc., is determined and evaluated. This can be - for example, after appropriate calibration - important for the ink transfer and thus the printing result contact pressure of the cylinder 02; 03 reproducible adjust. In a printing unit with at least three cylinders 02 acting together as a printing unit 01; 03 (for example, with impression cylinder) are at least two of the three cylinders 02; 03 in such linear bearings 13, 14 are each movably mounted along a direction of adjustment S, which with one of the axes of rotation of the cylinder to be positioned and following in the adjusting direction 02; 03 formed connecting plane at most forms an angle of 15 °. The movable cylinder 02; 03 is then in each case only in this cylinder 02; 03 associated bearing units 06 described above stored.

As already mentioned, the linearly movable cylinders 02, 03 are preferably preassembled or preassembled, respectively, with respective end-side bearing units 06 as a cylinder unit 04. For this purpose, these cylinders 02, 03 as a unit with bales and two end-side pin 09 z. B. an o. G. maximum length L02; L03 on.

In one of a printing unit 01 designed as a double printing unit 01, preferably at least the two forme cylinders 03 and at least one of the two transfer cylinders 02 are mounted so as to be linearly movable. The second transfer cylinder 02 can be operationally fixed to the frame, but in particular adjustable in its position, be stored. However, in one variant, all four cylinders 02; 03 be mounted so linearly movable.

In a three-cylinder printing unit 01 for the single-sided printing are at least two, in particular at least the two ink-carrying, cylinder 02; 03, for example, form and transfer cylinder 02; 03, in a variant, however, all three cylinders mounted so linearly movable.

LIST OF REFERENCE NUMBERS

01 printing unit, double printing unit

02 cylinder, printing cylinder, transfer cylinder

03 cylinder, printing cylinder, form cylinder

04 cylinder unit

05 -

06 Bearing unit, linear bearing unit

07 side frame

08 side frame

09 cones

10 -

11 gears

12 radial bearings, rotary bearings

13 bearing element, bearing means, linear bearings

14 bearing element, bearing means, linear bearings

15 -

16 sleds, storage block

17 carriers

18 recess

19 recess

20 -

21 adjusting means, adjusting drive

22 wave

23 worm shaft

24 worm wheel

25 -

26 threaded spindle

27 screw jack L clear width

L03 length

L04 length

S setting direction, travel

Claims

claims

1. A device for supporting a cylinder (02, 03) of a printing unit with a along a travel (S) in linear bearings (13, 14) movable, a rotary bearing (12) having bearing block (16), characterized in that the storage as a storage unit (06) is designed in the manner of a unit which can be assembled as a whole, which, in addition to the rotary bearing (12), comprises both the relative movement of the bearing block (16) and cooperating bearing elements (13; 14).

2. Apparatus according to claim 1, characterized in that in the mountable as a whole bearing unit (14) at least one relative movement between the frame-fixed and movable bearing part bewerkstellendes transmission (11) is integrated.

3. A device for supporting a cylinder (02, 03) of a printing unit with a along a travel (S) in linear bearings (13, 14) movable, a rotary bearing (12) having bearing block (16), characterized in that the storage as a storage unit (06) is designed in the manner of a unit which can be assembled as a whole, in which at least one transmission (11) which brings about the relative movement between the mounted and movable bearing part is integrated.

4. Apparatus according to claim 2 or 3, characterized in that the transmission (11) comprises means which one of a outside of the bearing unit (06) arranged adjusting means (21) on a member of the transmission (11) introduced adjusting movement in a linear movement of the carriage (16) transforms.

5. Apparatus according to claim 2 or 3, characterized in that the transmission (11) as a rotational movement of an actuating means (21) in a linear movement of the Carriage (16) perpendicular to the cylinder axis converts.

6. Apparatus according to claim 4 or 5, characterized in that the transmission (11) includes a gear and a cooperating with this rack.

7. Device according to claim 1 or 3, characterized in that two linear bearings (13, 14) surround the bearing block (16) in such a way that their bearing preload is an essential component in a direction perpendicular to the axis of rotation of the cylinder (02; causes.

8. Apparatus according to claim 4 or 5, characterized in that the adjusting means (21) is designed as a rotary actuator (21).

9. Apparatus according to claim 8, characterized in that the drive (21) is designed as an electric motor.

10. The device according to claim 4 or 5, characterized in that the adjusting means (21) on the back of the bearing unit (06), in particular on the bearing unit (06) facing away from the side frame (07, 08) is arranged.

11. The device according to claim 8, characterized in that an axis of rotation of the actuator (21) substantially parallel, but offset from the cylinder axis.

12. Printing unit with at least three cylinders (02, 03) acting together as printing unit (01), at least two of the three cylinders (02, 03) being movably mounted in linear bearings (13, 14) along a direction of adjustment (S), and wherein the respective adjustment direction (S) with an axis of rotation of the axis of rotation to be set and the cylinder (02, 03) following in the adjustment direction includes a maximum of 15 °, characterized in that the movable cylinders (02, 03) are each stored in only this cylinder (02, 03) associated bearing units (06).

13. Printing unit according to claim 12, characterized by a bearing unit (06) of the linearly movable cylinder (02, 03) according to one or more of claims 1 to 11.

14. Printing unit according to claim 12, characterized in that the linearly movable cylinders (02, 03) are preassembled with respective end bearing units (06) as a cylinder unit (04).

15. Printing unit according to claim 12, characterized in that the linearly movable cylinder (02, 03) as a unit with bales and two end-side pins (09) have a total length (L02, L03) which is less than or equal to a clear width (L ) between which the printing cylinder (02, 03) to both end faces supporting side frames (07, 08).

16. Printing unit according to claim 12, characterized in that the two Formzylfnder (03) and at least one of the two transfer cylinders (02) designed as a double printing unit (01) printing unit (01) are mounted so linearly movable.

17. Printing unit according to claim 16, characterized in that the second transfer cylinder (02) is operationally fixed to the frame, but in particular adjustable in its position, is mounted.

18. Printing unit according to claim 16, characterized in that all four cylinders (02, 03) are mounted so linearly movable.