EP1632350A1 - Method and device for slackening a covering of a cylinder of a printing machine. - Google Patents

Abstract

The releasing process releases at least one tympan from a cylinder (02) of a printing press, where it is locked in a channel (08) of the jacket surface (06). Compressed air (36) is supplied from outside the cylinder to at least one end of the tympan on both its end faces, from the side, to the underside of the tympan to release its suspension arm from the aperture.

Description

The invention relates to a method for clamping at least one elevator of a cylinder of a printing press according to the preamble of claim 1 and a device according to the preamble of claim 17.

WO 2004/020205 A2 discloses methods and a device for clamping at least one elevator of a cylinder of a printing machine, wherein at least one angled suspension leg at at least one end of the elevator in an opening leading to a channel arranged in the cylinder on the lateral surface of the cylinder is held, wherein a arranged in the channel, a holding position and a release position exhibiting, holding in the holding position the elevator on the cylinder holding means for clamping the elevator from its holding position to its release position changes.

In practice, an elevator with a mostly consisting of a metallic material, flexible in the circumferential direction of the cylinder carrier which is clamped on a cylinder of the printing press, by the particular exercised during a longer period of operation on him flexing a course of the lateral surface of the cylinder following Curvature imposed so that such an elevator can be difficult to solve at the end of its service life under certain circumstances by the lateral surface of the cylinder. This problem intensifies, the wider the elevator is in the axial direction of the cylinder. The width of the elevator can z. B. between 400 mm and 2,400 mm. Also, a sticking of the elevator on the lateral surface of the cylinder by substances used in the prepress and in the printing process, for. B. a rubber coating of the lifts or the ink, be caused, so that one of the Cylinder to be dissipated lift does not solve automatically from the lateral surface of the cylinder.

From DE 198 15 935 A1 discloses a printing cylinder of a rotary printing machine is known, which is equipped for lifting a flexible plate from the lateral surface of the printing cylinder with outlet openings for supplying a pressure medium in an inclined with its opening on the circumference of the printing cylinder in the direction of rotation slot Ends of the plate in the slot can be inserted and secured in this against slipping out. The pressure cylinder has a longitudinally separated from the slot extending, acted upon by the pressure medium cavity having at least one connected to the in one of the trailing end of the plate adjacent side surface of the slot in the region of the opening at the periphery of the pressure cylinder arranged outlet opening to the opening of the slot has aligned and thus producible through the opening channel.

From DE 196 36 412 C1 discloses a cylinder of a rotary printing machine with outlet openings for supplying a pressure medium is known to lift a flexible plate from a lateral surface of the cylinder, said ends of the plate are arranged in a channel, wherein at least one opening into the channel outlet opening is.

From DE 43 03 381 A1 discloses a plate cylinder with a device for lifting a printing plate is known, wherein for raising the pressure plate from the front side of the plate cylinder outgoing axial bore is provided, leading to the pressure plate leading outlet openings are connected and that between the end face of the plate cylinder and a printing unit side wall compressed air supply lines are arranged, via which said bores and openings can be acted upon with compressed air, so that the pressure plate arranged above the outlet openings can be lifted from the plate cylinder. In addition, there is the note, a printing plate to be removed by an attached on an end face of the printing plate tool from the plate cylinder to raise.

From DE 199 51 354 A1 a sleeve for the printing industry is known, with a flexible surface having the print motif, and which is mountable on a cylindrical support body, wherein the surface is tubular and has two front ends, wherein the inner diameter the surface, when this is dismantled from the carrier body, is smaller than the outer diameter of the carrier body, wherein the surface is designed so flexible hose-like that the surface by externally blown at its aufzuschiebenden on the carrier body front end compressed air enabling the complete assembly on the carrier cylinder enabling expandable is, wherein the compressed air can be provided and applied by means of a compressed air gun.

The invention has for its object to provide a method and an apparatus for clamping at least one elevator of a cylinder of a printing machine, in which also a with a higher adhesion on the lateral surface of the cylinder adhering elevator is reliably released from the lateral surface of the cylinder.

The object is achieved by a method having the features of claim 1 or a device having the features of claim 17.

The achievable with the present invention consist in particular that an elevator z. B. reliably solves it with a curvature imposed by the lateral surface of the cylinder and dissipated. In particular, the reliable release also the use of a device for automatically changing an elevator on the cylinder, for. B. a storage device for storing the discharged from the cylinder elevator favors.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Fig. 1

ein nachlaufendes Ende eines von einem Zylinder abzuspannenden Aufzugs;

Fig. 2

ein vorlaufendes Ende eines von einem Zylinder abzuspannenden Aufzugs;

Fig. 3

eine Rückansicht einer Anordnung zur Durchführung des vorgeschlagenen Verfahrens, umfassend einen Zylinder mit zwei nebeneinander angeordneten Aufzügen und eine Traverse mit Druckluftleitungen;

Fig. 4

eine Seitenansicht der Anordnung nach Fig. 3 in einer ersten Betriebsstellung;

Fig. 5

eine Seitenansicht der Anordnung nach Fig. 3 in einer zweiten Betriebsstellung.

Show it:

Fig. 1

a trailing end of an elevator to be tensioned by a cylinder;

Fig. 2

a leading end of an elevator to be tensioned by a cylinder;

Fig. 3

a rear view of an arrangement for carrying out the proposed method, comprising a cylinder with two juxtaposed lifts and a traverse with compressed air lines;

Fig. 4

a side view of the arrangement of Figure 3 in a first operating position.

Fig. 5

a side view of the arrangement of FIG. 3 in a second operating position.

An elevator 01 is from a cylinder 02 of a printing press, z. As a web-fed rotary offset printing machine and discharged. In the elevator 01, it may be z. B. to act a flexible, in particular elastically bendable printing forme 01, which is mounted on a forme cylinder 02. The bendable in the circumferential direction of the cylinder 02 elevator 01 usually has a made of a metallic material, flexible carrier.

A suspension leg 03a angled off at an end of the elevator 01 leading in the production direction P of the cylinder 02 is preferably positively mounted on a correspondingly formed first wall 04 of a preferably slot-shaped opening 07 introduced into the lateral surface 06 of the cylinder 02 (FIG. 2). When the elevator 01 fully circumferentially spans the cylinder 02, a single such opening may be formed 07 in cylinder 02 suffice. In the case of several elevators 01 to be applied in the circumferential direction of the cylinder 02, a plurality of preferably identically designed openings 07 are located in the cylinder 02 in an offset arrangement on the circumference. In two elevators 01 in the circumferential direction, the openings 07 z. B. offset by 180 ° to each other. In this case, a suspension leg 03a is attached to the leading end of an elevator 01 in one opening 07, while a suspension leg 03b is attached to the trailing end of the same elevator 01 in the other opening 07 (not shown).

The opening 07 leads to a longitudinal axis of the cylinder 02 extending channel 08, in which a holding device, for. B. is a clamping device, the z. B. substantially consists of a base 09 of the channel 08 in a groove 11 pivotally mounted holding means 12 and a clamped between a wall 13 of the channel 08 and the holding means 12 spring element 14 (Fig. 2). The holding means 12, which is advantageously designed as a rigid lever 12, is pivotable against the force of the spring element 14 by an abutting in the channel 08 actuating means 16 to solve a made with the holding means 12 on a second wall 17 of the opening 07 clamping , The holding means 12 thus has in each case as one of its operating positions a holding position, in particular a clamping position, and a release position. Such a clamping device is z. As described in DE 100 58 996 C1. To explain further details of the clamping device and its operation, reference is made to the aforementioned document.

In the vicinity of the cylinder 02 is at a distance from the cylinder 02, a holder 21, for. B. a extending along the cylinder 02 Traverse 21 is provided, wherein a device for pressing an elevator 01 to the cylinder 02 of the printing press by means of pressing elements 31; 32, preferably as rolling elements 31; 32 are formed, is arranged on the holder 21, wherein the pressing elements 31; 32 to the cylinder 02 on or are offset from this. In this case, a first carrier 22 having a first end 23 and a second end 24 and a second carrier 26 with a first end 27 and a second end 28, wherein in one embodiment, the first end 23 of the first carrier 22 with the extending along the cylinder 02 Traverse 21 is firmly connected. At least one first rolling element 31 is arranged at the second end 24 of the first carrier 22. Likewise, the first end 27 of the second carrier 26 is preferably fixedly connected to the first carrier 22, preferably to the second end 24 thereof, wherein the first carrier 22 and the second carrier 26 are arranged substantially stacked with each other, the first end 27 of second carrier 26 is preferably flush with the second end 24 of the first carrier 22. At least one second rolling element 32 is arranged at the second end 28 of the second carrier 26. The first rolling element 31 and the second rolling element 32 are thus spaced one behind the other in the circumferential direction of the cylinder 02, so that - as shown in FIGS. 1 and 2 - results in a so-called double-roller or tandem roller arrangement. The term tandem arrangement indicates that, in the circumferential direction of the cylinder 02, two essentially identical components, in this case pressure elements 31; 32 or rolling elements 31; 32 are arranged.

For turning on or off the rolling elements 31; 32 to the cylinder 02 or from the first support 22 acting on the first actuating means 33 and a second on the second support 26 acting adjusting means 34 are provided, wherein the first adjusting means 33 and the second adjusting means 34 are independently operable. Such achieved independent arrival and Abstellbarkeit the rolling elements 31; 32 is just then advantageous if several elevators 01 are arranged side by side on the cylinder 02 in the axial direction and individual elevators 01 are to be selectively raised or unclamped. So z. B. when removing a single elevator 01, the other elevators 01 by appropriately employed rolling elements 31; 32 are held securely on the cylinder 02, even if a common for several elevators 01, arranged in the cylinder 02 holding means 12 a holding device is opened and the holding means 12 thus the attachment of the elevators 01 on the cylinder 02 releases.

The adjusting means 33; 34 are z. B. as a pressurizable with a pressure medium, reversibly deformable hollow body, for. B. as a hose 33; 34, executed. The first acting on the first carrier 22 actuating means 33 may, for. B. against a fixed connected to the cross member 21 or molded there rigid stop 29 support, because the first adjusting means 33 in particular between the crossbar 21 and the stop 29 and the first carrier 22 is arranged, whereas the second on the second carrier 26 acting Adjusting means 34 is preferably arranged between the first carrier 22 and the second carrier 26 and is preferably supported on the first end 23 of the first carrier 22 connected to the crossbeam 21. It is advantageous to carry out the second carrier 26 longer than the first carrier 22, with such a large projection that the second rolling element 32 arranged at the second end 28 of the second carrier 26 laterally beside the traverse 21 in the unactuated state of the second actuating means 34 can be positioned, but preferably without touching the traverse 21.

It is advantageous, the carrier 22; 26 each as an elastically bendable, d. H. form reversibly deformable body, especially in sheet shape, z. B. as a spring plate 22; 26. When a carrier 22; 26 by an operation of an associated actuating means 33; 34 can be bent elastically to a rolling element 31; 32 to make the cylinder 02, no additional means are required to the on the supports 22; 26 arranged rolling elements 31; 32 after actuation of the associated adjusting means 33; 34 again turn off the cylinder 02. In this embodiment, the carrier springs 22; 26 without the help of externally attacking forces back to their original position.

The rolling elements 31; 32 may be used as a roller 31; 32 or as a roller 31; 32 be formed. Also, a plurality of first carriers 22 may each be arranged side by side with at least one first rolling element 31 on the cross member 21, these rolling elements 31 being independent of each other individually or in groups by their carriers 22 associated first adjusting means 33 to the cylinder 02 on or are off. Likewise, it may be advantageous to arrange a plurality of second carriers 26 each adjacent to one another with at least one second rolling element 32 on the first carrier 22, these rolling elements 32 independently or in groups being connected by their carriers 26 to second actuating means 34 on the cylinder 02 are off. A preferred embodiment provides that a roller 31 extending along the cylinder 02 and a plurality of second carriers 26 having at least one roller 32 are arranged on the first carrier 22. This embodiment is particularly useful when the cylinder 02 has a plurality of elevators 01 next to one another and each elevator 01 is assigned a second carrier 26 with at least one second rolling element 32.

A method for tensioning at least one elevator 01 from the cylinder 02 of the printing machine, wherein at least one angled suspension leg 03a; 03b is held on at least one end of the elevator 01 in the opening 02 leading to the cylinder 02 in the opening 08 on the outer surface 06 of the cylinder 02, wherein a arranged in the channel 08, a holding position and a release position exhibiting, in the holding position the elevator 01 retaining means 12 holding on the cylinder 02 for unclamping the elevator 01 from its holding position to its release position, in a preferred embodiment, the method step that with the change of the holding means 12 in its release position from outside the cylinder 02 at least at one of the ends of the elevator 01 to be tensioned laterally under this elevator 01 compressed air 36 for releasing the suspension rack 03a; 03b is blown out of the opening 07.

The holding means 12 of the holding device changes to tension the elevator 01 preferably by pivoting into its release position, whereupon in the example of FIG. 1 the suspension leg 03b is impressed on the trailing end of the elevator 01 to be tensioned due to its flexing work on it during a longer service life , the course of the lateral surface 06 of the cylinder 02 following Curvature is not necessarily automatically springs out of the opening 07. To assist the release of Einhänlegeels 03b from the opening 07 is laterally under this elevator 01, ie between this end of the elevator 01 and the outer surface 06 of the cylinder 02, blown by a targeted air flow of compressed air 36, wherein at the two end faces of this of the lateral surface 06 of the cylinder 02 to be solved elevator 01 each at least one compressed air nozzle z. B. on the cross member 21 or on a storage device for storing the cylinder 02 discharged elevator 01 is mounted. Preferably, one or more compressed air nozzles are arranged on both longitudinal sides of the elevator 01 to be tensioned. The flowing compressed air 36 is indicated in FIGS. 1 and 2 by flow lines. The storage device for storing the elevator 01 discharged from the cylinder 02 preferably extends at a small distance from the cylinder 02 in its axial direction. After releasing the Einhänlegeels 03b from the opening 07, the holding means 12 of the holding device can change back to its holding position. The release of the Einhänlegeels 03b at the trailing end of the elevator to be peeled 01 supporting compressed air 36 may be at a pressure z. B. be set between 2 bar and 6 bar. The adjustment of the pressure of the compressed air 36 may be variable within fixed limits, ie between a minimum value and a maximum value. By a variability of the pressure of the compressed air 36, it is possible to select a pressure adapted to the adhesion of the Einhänlegeels 03b at the trailing end of the elevator 01 to be tensioned. It is often the case that a higher pressure is required for releasing an elevator 01 which has been solidified by a longer service life than for a frequently to be changed elevator 01. A control device controlling the pressure of the compressed air 36 can therefore also take into account the service life of the elevators 01 as a parameter , wherein the service life z. B. from the number of this elevator 01 to be produced or already produced printed copies is derived.

After releasing the Einhänlegeels 03b at the trailing end of the elevator 01 to be tensioned, the cylinder 02 preferably rotates counter to its direction of production P until the suspension leg 03a at the leading end of this abzuspannenden elevator 01 of the first wall 04 of the opening 07 aushängbar and thus this elevator 01 completely from the cylinder 02 is removable. With the rotation of the cylinder 02, the trailing end of the elevator to be tensioned 01 z. B. introduced into the storage device for storing the discharged from the cylinder 02 elevator 01. The release of the Einhänlegeels 03a at the leading end of the elevator to be peeled 01 from the opening 07 can also be supported by lateral blowing with compressed air 36. The compressed air 36 assisted release of the Einhänlegeels 03 a at the leading end of the elevator 01 to be peeled off the opening 07 sets z. B. only when the cylinder 02 has rotated to a certain position, wherein the position of the cylinder 02 for releasing the Einhänlegeels 03b at the trailing end and for releasing the Einhänlegeels 03a at the leading end of the abzuspannenden elevator 01 at least approximately same can be. However, it may also be provided that during the rotation of the cylinder 02 for discharging the end of the cylinder 02 to be removed from the cylinder 02 from the outside of the cylinder 02 continuous compressed air 36 is blown laterally under this elevator 01. The completely detached from the cylinder 02 elevator 01 is then completely removed from the cylinder 02 and z. B. fed into the storage device and stored there.

FIGS. 3 to 5 show a further embodiment of the solution found. Fig. 3 shows a simplified view of a rear view of an arrangement with a cylinder 02, in particular a forme cylinder 02, with z. B. two on the lateral surface 06 in the axial direction juxtaposed elevators 01, in particular printing plates 01. It can thereby on the lateral surface 06 of this cylinder 02 in its circumferential direction a single elevator 01 or more, for. B. two elevators 01 may be arranged. In this example it is assumed that in the circumferential direction only one single elevator 01 is arranged in the cylinder 02, with suspension legs 03a formed at the two ends of the elevator 01; 03b each inserted into a slot-shaped opening 07 on the lateral surface 06 of the cylinder 02 and in an axially parallel to the cylinder 02 in the bale extending channel 08 (in Fig. 3 by a dashed line only indicated) are held. For details of a arranged in the channel 08 holding device, for. B. clamping device, reference is made to Figs. 1 and 2 with the associated description.

At a small distance A from the lateral surface 06 of this cylinder 02, wherein the distance A z. B. is less than 100 mm, preferably between 20 mm and 50 mm, in the arrangement shown in FIGS. 3 to 5, an axially parallel to the cylinder 02 extending cross member 21 is arranged, wherein the cross member 21 z. B. as a tube, in particular as a square tube, may be formed, which is apparent from Figs. 4 and 5, each showing a side view of the arrangement shown in FIG. 3, wherein FIGS. 4 and 5 with respect to each illustrated operating position of the arrangement differ from each other. At the Traverse 21 are each at a z. B. by a bend deflectable carrier 22 each have a rolling element 31 is mounted so that the rolling element 31 by the operation of a preferably between the carrier 22 and the traverse 21 arranged adjusting means 33 to the lateral surface 06 of the cylinder 02 can be adjusted or set off from this (Fig 4 and 5), wherein the adjusting means 33 is preferably designed as an elastic hose 33 which can be acted upon by a pressure medium, in particular by compressed air 36. In the axial direction of the cylinder 02, preferably a plurality of rolling elements 31, z. B. three rolling elements 31, each for each of the juxtaposed elevators 01, provided, wherein one of the juxtaposed elevators 01 associated rolling elements 31 are preferably independently of the other of the juxtaposed elevators 01 associated rolling elements 31 are actuated. Accordingly, the rolling elements 31 attached to the traverse 21 can be actuated jointly or selectively with respect to a selected elevator 01. 4, the one of the juxtaposed elevators 01 associated rolling elements 31 to the outer surface 06 of the cylinder 02 employed, whereas in Fig. 5 one of the adjacently arranged elevators 01 associated rolling elements 31 are turned off by the lateral surface 06 of the cylinder 02, so that Figs. 4 and 5 among other things in the operating position of belonging to the arrangement adjusting means 33, carrier 22 and rolling elements 31 from each other.

Preferably, within or along the traverse 21 is at least one rigid or flexible line 18 formed; 19 laid over which compressed air 36 from a permanently or at least temporarily connected preferably controllable source of compressed air is feasible. Preferably, in or on the traverse 21 as many lines 18; 19 provided as elevators 01 are arranged on the lateral surface 06 of the cylinder 02 in the axial direction next to each other. In the example shown in Figure 3 are two independently pressurizable with compressed air 36 lines 18; 19 provided. From each of the lines 18; 19 is compressed air 36 via at least two rigid, z. B. formed as a tube branches 37; 38; 39; 41 laterally close to a arranged on the outer surface 06 of the cylinder 02 Elevator 01 zoom, wherein the branch 37; 38; 39; 41 forming line piece for guiding the compressed air 36 z. B. can be made of a metallic material or a plastic. It is preferably provided that in each case a pair of on one of the lines 18; 19 connected branches 37; 38; 39; 41 compressed air 36 to the same end of the same from the outer surface 06 of the cylinder 02 to be tensioned elevator 01 passes. Also, of at least one, preferably of each conduit 18; 19 each via a branch 37; 38; 39; 41 compressed air 36 preferably at the same time each on both sides of a arranged on the lateral surface 06 of the cylinder 02 elevator 01 can be moved.

The branches 37; 38; 39; 41 preferably have at their end close to an elevator 01 a directed to the side area of this elevator 01, preferably nozzle-shaped opening from which the compressed air 36 can flow purposefully to the side region of the lift 01 to be tensioned, wherein a side region of the lift 01 to be tensioned is near the end region of the respective branch 37; 38; 39; 41 z. B. bent, angled formed and / or conically tapering or otherwise as compared to the line cross section of the branches 37; 38; 39; 41 can be formed querschnittsvermindernd. The branches 37; 38; 39; 41 are with their respective formed for the exit of the compressed air 36 opening z. B. except for only a few millimeters, z. B. to a distance a of less than 5 mm, brought to the side region of a arranged on the outer surface 06 of the cylinder 02 elevator 01, wherein the compressed air 36 due to the design of the abzuspannenden elevator 01 near end portion of the branches 37; 38; 39; 41 each preferably in a directed at an acute angle α on the lateral surface 06 of the cylinder 02 flow area exiting from this opening, wherein the angle α relative to a resting on the lateral surface 06 of the cylinder 02 fictitious tangent T or relative to an orthogonal to the cylinder axis 42nd extending circumferential line U of the cylinder 02 z. B. in the range between 15 ° and 60 °, in particular between 30 ° and 45 (Figures 3 and 5).

The branches 37; 38; 39; 41 accordingly belong to a pair of lines to be tensioned elevator 01 associated line system for laterally from outside of the cylinder 02 at one of the ends of the abzuspannenden elevator 01 under this elevator 01 to be blown compressed air 36, wherein the preferably nozzle-shaped openings of a pair of a particular abzuspannenden elevator 01 associated branches 37; 38; 39; 41 in the axial direction of the cylinder 02 are at least as far apart from each other, as this elevator to be tensioned 01 in the axial direction of the cylinder 02 is wide (Fig. 3). Preferably, a distance between the openings of a pair of a lift to be peeled elevator 01 associated branches 37; 38; 39; 41 in the axial direction of the cylinder 02 is slightly larger than the width B of the elevator to be tensioned 01. Also, the distance between the openings of a pair of a lift to be peeled elevator 01 associated branches 37; 38; 39; 41 in the axial direction of the cylinder 02 at least during the release of one of the ends of the elevator 01 to be tensioned rigidly, ie not changeable. A pair of apertures associated with a lift 01 to be tensioned is preferably simultaneously pressurized with compressed air 36.

Each of the compressed air 36 to the branches 37; 38; 39; 41 conductive lines 18; 19 is pressurized with compressed air 36 in particular when an elevator 01 to be removed from the lateral surface 06 of the cylinder 02 is in the flow region of the compressed air 36 flowing out of one of the nozzle-shaped openings, or at least this flow region happens. To unclamp the elevator 01, the cylinder 02 assumes a suitable angular position, wherein the opening 07 of the at least one suspension leg 03a; 03b of the elevator 01 to be removed holding channel 08 at least substantially z. B. to Traverse 21 or to another the branches 37; 38; 39; 41 holding device is directed (Fig. 4). Preferably, before or simultaneously with the application of compressed air 36, the rolling element 31 assigned to the elevator 01 to be removed or the roller elements 31 assigned to it are actuated by actuation of an adjusting element 33 associated with the rolling elements 31 on the lateral surface 06 of the cylinder 02 and in the channel 08 of the cylinder 02 arranged holding means 12 brought by actuation of a provided in the channel 08 actuating means 16 from its holding position, in particular a clamping position, in its release position (Figs. 1 and 2). In the rest state of the arrangement, the rolling element 31 or the rolling elements 31 are offset from the lateral surface 06 of the cylinder 02 and there is also no supply of compressed air 36 to the lateral surface 06 of the cylinder 02 (Fig. 5).

The control of a with the lines 18; 19 connected compressed air source for applying a tensioned elevator 01 with compressed air 36, the employment or shutdown of one or more rolling elements 31, changing a arranged in the channel 08 holding means 12 from its holding position to its release position and / or vice versa or the rotation of the cylinder 01 and its positioning with respect to a suitable angular position for clamping the elevator 01 can preferably be controlled programmatically by the same control unit.

LIST OF REFERENCE NUMBERS

01

Elevator, printing form

02

Cylinder, forme cylinder

03a

suspension leg

03b

suspension leg

04

Wall, first

05

-

06

lateral surface

07

opening

08

channel

09

reason

10

-

11

groove

12

Holding means, lever

13

Wall (08)

14

spring element

15

-

16

actuating means

17

Wall, second

18

management

19

management

20

-

21

Bracket, Traverse

22

Carrier, first, spring steel

23

End, first (22)

24

End, second (22)

25

-

26

Carrier, second, spring steel

27

End, first (26)

28

End, second (26)

29

attack

30

-

31

Pressure element, rolling element, first, roller, roller

32

Pressure element, rolling element, second, roller, roller

33

Adjusting means, first, hose

34

Adjusting means, second, hose

35

-

36

compressed air

37

diversion

38

diversion

39

diversion

40

-

41

diversion

42

cylinder axis

a

distance

A

distance

B

width

P

production direction

T

tangent

U

peripheral line

α

angle

Claims (30)

Method for tensioning at least one elevator (01) from a cylinder (02) of a printing press, wherein at least one angled suspension leg (03a, 03b) is arranged at at least one end of the elevator (01) in a channel (08 ) leading opening (07) of the lateral surface (06) of the cylinder (02) is held, characterized in that from outside the cylinder (02) at least at one of the ends of the elevator to be tensioned (01) at its two end faces compressed air (36) laterally under this elevator (01) is blown out of the opening (07) for releasing its suspension handle (03a; 03b), the compressed air (36) being formed from a pair of cylinders (02) in the axial direction at least corresponding to a width (B) of the cylinder Elevator (01) spaced apart openings of the compressed air (36) conductive conduit system is blown under this elevator (01). A method according to claim 1, characterized in that the compressed air (36) simultaneously emerges from the openings to be tensioned elevator (01) associated openings. A method according to claim 1, characterized in that in the channel (08) arranged, a holding position and a release position exhibiting holding in the holding position the elevator (01) on the cylinder (02) holding means (12) for clamping the elevator (01) changes from its stop position to its release position. A method according to claim 3, characterized in that the compressed air (36) before or simultaneously with the change of the holding means (12) is blown laterally into its release position under the lift (01) to be tensioned. A method according to claim 1, characterized in that the cylinder (02) after releasing the Einhänlegeels (03a, 03b) at one of the ends of the elevator to be tensioned (01) from the opening (07) against its production direction (P) rotated and with the Rotation of the cylinder (02), the dissolved end of the elevator to be tensioned (01) from the cylinder (02) is removed. A method according to claim 5, characterized in that during the rotation of the cylinder (02) for discharging the cylinder (02) dissolved end of the cylinder (02) dissipated elevator (01) from outside the cylinder (02) compressed air (36) continuously is blown laterally under this elevator (01). A method according to claim 1, characterized in that for releasing a Einhänlegeels (03a, 03b) at the other end of the elevator to be peeled (01) from the opening (07) also from outside the cylinder (02) compressed air (36) under this other end the elevator (01) is blown. A method according to claim 1, characterized in that the completely detached from the cylinder (02) elevator (01) is completely removed from the cylinder (02). A method according to claim 3, characterized in that the suspension leg (03a, 03b) on an in the production direction (P) of the cylinder (02) trailing end of the elevator (01) to be tensioned by the in the channel (08) arranged holding means (12) in the Hold position is held. A method according to claim 1, characterized in that first on the in the production direction (P) of the cylinder (02) trailing end of the elevator to be tensioned (01) and only after rotation of the cylinder (02) on a in production direction (P) of the cylinder ( 02) leading end of this compressed air (36) under the respective end of the elevator (01) is blown. A method according to claim 1, characterized in that the compressed air (36) is laterally blown under the abzuspannenden elevator (01) after or at the same time with a hiring of a pressure element (31) on the lateral surface (06) of the cylinder (02). A method according to claim 1, characterized in that the compressed air (36) in a directed at an acute angle (α) on the lateral surface (06) of the cylinder (02) flow area is laterally blown under the lift (01) to be tensioned. A method according to claim 1, characterized in that the compressed air (36) for each of a plurality of in the axial direction of the cylinder (02) juxtaposed elevators (01) is selectively blown laterally under the respective abzuspannenden elevator (01). A method according to claim 1, characterized in that the compressed air (36) with a pressure between 2 bar and 6 bar laterally blown under the lift (01) to be tensioned. A method according to claim 1, characterized in that a compressed air source for acting on a lift (01) to be tensioned is controlled by compressed air (36) as a function of a service life of the elevator (01) to be tensioned. Method according to one of the preceding claims, characterized in that the control of the compressed air source for acting on a abzuzuspannenden Elevator (01) with compressed air (36), the adjustment or shutdown of one or more pressing elements (31), changing a in the channel (08) holding means (12) from its holding position to its release position and / or vice versa or the rotation of the Cylinder (01) or its positioning with respect to a suitable for clamping the elevator (01) angular position are controlled by the same control unit. Device for clamping at least one elevator (01) from a cylinder (02) of a printing press, wherein a holding means (12) arranged in a channel (08) of the cylinder (02) comprises at least one angled opening leading into the channel (08) (07) of the lateral surface (06) of the cylinder (02) inserted suspension leg (03a, 03b) holds at least one end of the lift (01) to be tensioned, characterized in that outside the cylinder (02) associated with the elevator (01) to be peeled Line system for laterally under at least one of the ends of the elevator to be peeled (01) to be blown compressed air (36) is provided, wherein the conduit system two in the axial direction of the cylinder (02) at least corresponding to a width (B) of the elevator to be tensioned (01) spaced apart openings for an outflow at both end faces of the elevator (01) laterally under the at least one end of the elevator to be peeled (01) to be blown compressed air (36). Apparatus according to claim 17, characterized in that the conduit system has at least one line (18; 19) connectable to a compressed air source with at least two branches (37; 38; 39; 41) connected to this line (18; 19), each of these Branches (37; 38; 39; 41) in the line (18; 19) guided compressed air (36) laterally on at least one of the ends of the elevator to be tensioned (01). Apparatus according to claim 18, characterized in that the branches (37; 38; 39; 41) each have at least one opening directed towards the side region of the elevator (01) to be tensioned. Apparatus according to claim 18, characterized in that an end region of the branches (37; 38; 39; 41) having the opening is bent, formed at an angle and / or designed to reduce the cross-section of the cross-section of the branches (37; 38; 39; 41). Apparatus according to claim 17, characterized in that the openings are nozzle-shaped. Apparatus according to claim 17, characterized in that the openings at a distance (a) of less than 5 mm from the side region of the jacket surface (06) of the cylinder (02) to be removed elevator (01) are arranged. Apparatus according to claim 17, characterized in that the compressed air (36) emerges from the openings in a flow region directed at the lateral surface (06) of the cylinder (02) at an acute angle (α). Apparatus according to claim 23, characterized in that the angle (α) relative to a on the lateral surface (06) of the cylinder (02) resting tangent (T) and / or relative to an orthogonal to the cylinder axis (42) extending peripheral line (U) of the cylinder (02) is in the range between 15 ° and 60 °. Apparatus according to claim 17, characterized in that the distance between the openings of a pair of the lift (01) to be tensioned branches (37; 38; 39; 41) in the axial direction of the cylinder (02) at least during the release of one of the ends of the elevator (01) to be tensioned is not changeable. Apparatus according to claim 18, characterized in that the line piece forming the branch (37; 38; 39; 41) is formed from a metallic material or from a plastic. Apparatus according to claim 18, characterized in that the branches (37; 38; 39; 41) are arranged on or in a traverse (21) extending parallel to the axis of the cylinder (02). Apparatus according to claim 27, characterized in that at least one pressing element (31) and a pressing element (31) on the lateral surface (06) of the cylinder (02) at least adjusting actuating means (33) are arranged on the crossmember (21). Apparatus according to claim 17, characterized in that on the lateral surface (06) of the cylinder (02) in the axial direction a plurality of elevators (01) are arranged, wherein for each elevator to be tensioned (01) a line system with two in the axial direction of the cylinder (02) at least corresponding to the width (B) of the lift (01) to be separated from each other openings for an outflow of the compressed air (36) to be blown laterally under at least one of the ends of the elevator to be peeled (01). Apparatus according to claim 29, characterized in that in several in the axial direction of the cylinder (02) juxtaposed elevators (01) each associated piping systems are independently pressurized air (36) acted upon.

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