EP1155829A2 - Exchangeable cylinder element in an electrographic printing unit - Google Patents

Abstract

The cylinder has two ends (2,25) supporting a sleeve (3) accommodating a functional coating (23). The ends are mounted on a bearer body (1) passing through the cylinder. The sleeve accommodating the functional coating can be centered with respect to the rotation axis with centering surfaces on the ends, whereby at least one end can be released with respect to the bearer body. Independent claims are also included for the following: (1) a printing mechanism; (2) a printing machine.

Description

The invention relates to interchangeable cylinder elements on electrographic for printing web or sheet material serving printing units.

DE 37 05 477 C1 describes a holding device for the application of a sleeve a cylinder became known. For applying a sleeve through an opening in one printing unit side wall is on the outside of the other printing unit side wall of the cylinder on the elongated journal of the cylinder one Above this transversely arranged eccentrically mounted auxiliary shaft in one Gearbox positioned. By adjusting nuts is the auxiliary shaft and thus the Axle journal of the cylinder horizontally adjusted and lockable. At this Arrangement is a sleeve laterally through an opening in the printing unit side wall on the solidly designed printing unit cylinder of a printing unit pushed a rotary printing machine.

DE 40 36 387 A1 and DE 40 36 388 A1 each contain bearings for Printing unit cylinders in rotary printing machines. From the former Laid-open specification is a bearing for a printing unit cylinder Web-fed rotary printing press with a replaceable one, axially of that Known cylinder peelable jacket. One the cylinder when changing the coat unilaterally supporting auxiliary device should lock this comprehensively, in Do not interfere with printing operations and do not touch. According to DE 40 36 387 A1 outside and / or inside the pin when changing the jacket machine side wall still bearing on the pins one each the cylinder supporting role with concave outer surface adjustable in one on the machine frame arranged, pivotable in the longitudinal direction of the pin lever stores.

DE 40 36 388 A1 represents an alternative solution, with outside and / or inside the machine side wall supporting the journal of the cylinder Each pin can be adjusted to support the cylinder, which rotates in the frame can be stored, lying perpendicular to the support surface next to the pin Has eccentric and by means of a four-bar linkage with another on the other side of the pin in the frame mounted eccentric is connected. This solution, which is accompanied by quite complex mechanics, concerns printing units of web-fed rotary printing machines with which massive cylinders are supported in the printing unit during the sleeve change.

DE 40 36 390 A1 and DE 40 36 391 A1 each refer to bearings for Printing unit cylinders in web-fed rotary printing machines.

DE 40 36 390 A1 describes the cylinder of a web-fed rotary printing press when changing the cylinder lift, one-sided supporting device emerges, which locks the cylinder but does not touch it during printing. This is centric to the one stored in the side wall of the machine and protruding from the latter Pin of the cylinder arranged a centering in the machine frame or in the pin can be pushed.

DE 40 36 391 A1 also relates to a holding device for one Printing unit cylinder during the period in which a jacket change occurs on this is carried out. According to the solution from DE 40 36 391 A1 is outside and / or within the machine side wall supporting the journal of the cylinder one each slidably arranged in the frame, supporting the pin and in one Recess of partially extensive slides using an eccentric on the Adjustable pin.

US 4,119,032 also discloses a holding device for a cylinder, which in the Printing unit of a printing press installed a coat change experiences. This is a pin of the full cylinder, which is in the side walls of the Printing machine is stored, by removing part of the side wall exposed, while the other cylinder pin provided on the drive side by means of of a yoke is enclosed so that the cylinder remaining in the printing unit is protected against tipping and the jacket of the cylinder is replaced can be.

EP 0 575 739 B2 relates to a device for supporting a cylinder in a rotary printing press with a frame with disputed from each other Sidewalls. Inside is a pressure cylinder with a support element for the Supporting the ends of the impression cylinder is provided in the side walls. The Carrier element is removable from one end of the printing cylinder, one Counterweight mechanism with an adjustable rotating arm is provided, which in a support position force on the other end of the Pressure cylinder exerts this when removing the carrier element in the Support frame. A joint piece for moving the swivel arm into the Cylinder supporting position and for holding the rotating arm in this position against the weight of the impression cylinder has an end position for its Mobility to adjust the swivel arm. Because of the end position prevents a surprising or sudden drop in pressure in the holding system and the cylinder even if there is a pressure drop in the hydraulic system Holding device to be held in position in the printing unit of the rotation.

US 5,215,013, relates to a web processor in a printing unit Rotary printing machine recorded cylinder on one sleeve-shaped transmission sleeve can be pushed on. For this, the sleeve is in front Push on the jacket of the one in the printing press, one-sided supported cylinder expanded by means of compressed air, so that the sleeve on the side the coat can be put on. The side of the air cushion outflowing air causes a high-frequency noise, which is caused by a damping ring embedded in the sleeve to be pushed open is damped.

From US 5,649,267 is a method for arranging a drum arrangement known, the drum can be used in a printing unit. On the Circumferential surface of the drum, which acts as an endless rotating surface a toner image can be arranged. The drum arrangement comprises a hollow drum with an opening at each end and one Surface to which the toner image can be applied. A support surface which contains an opening inside it before it enters the drum surface is used at the ends, cooled and thus into the open Shrunk ends of the outer surface of the drum. When heating the previously cooled disc-shaped elements expands and thus produce a press fit between the lateral surface and the end faces. In the face there are also openings in which a drum supporting beam can be added. With the solution according to US 5,649,267 there is the disadvantage that to renew the functional layer on the The outer surface of the cylinder is to be replaced as the complete arrangement End faces of the drum arrangement in each case in the forming the outer surface Arrangement are shrunk. A cooling inside the machine to the End faces to disassemble the drum arrangement in the machine is highest complex and cumbersome.

In cylinder arrangements with photoelectric functional surfaces Wear, for example due to the removal of particles from the surface, occurs over the service life depending on the stress on the photoelectric layer inevitably and represents a technical problem.

In view of the solutions known from the prior art primarily on one-sided support of full cylinders on web-fed rotary printing presses refer and the solution known from US 5,649,267, is the Invention based on the task of replacing a functional layer, For example, a photoelectric layer on a cylinder of a printing unit to simplify and with minimal effort within the printing unit perform.

According to the invention, in the case of a cylinder with a functional layer, with the on Carrier body penetrating cylinder, on two of which the functional layer receiving sleeve supporting end faces are provided, the Support body is supported in frame-side support elements, which is the functional layer receiving sleeve through on the end faces supporting this trained centering surfaces centered on the axis of rotation, one end of the Cylinder is exposed on a support member.

The advantages associated with the solution proposed according to the invention lie primarily in the fact that such a type of cylinder arrangement formed Exposing an opening in a side wall supporting the cylinder arrangement can be removed from the side of the printing unit. After loosening one end face with The worn outer surface can be centered on the carrier body a refurbished or even a new photoelectric functional layer replace, for example, with the end faces receiving the centering surfaces as well as the support body passing through it, together with the cylinder arrangement roller bearings can be reused. With the invention Above all, the solution is linked to the economic advantage that not the The entire cylinder has to be replaced because the centering surfaces have detachable connections between the end faces and the cylinder sleeve carrying the functional surfaces form, in contrast to those that form through shrink connections Press kits that are difficult to solve.

In a further embodiment of the idea on which the invention is based the end faces that are on the carrier body, i.e. an axis / shaft added are provided with circumferential centering surfaces. The circumferential centering surfaces on the end faces can be designed in a certain geometry, whereby the cylinder sleeve receiving the functional layer on its end faces with a to the beveling of the centering surfaces of the end faces receiving the sleeve complementary bevel can be provided. In advantageous and manufacturing technology the centering surfaces can be particularly simple the end faces are designed as bevels.

In an advantageous embodiment of the idea on which the invention is based one of the end faces on the support body relative to the other end face of the support body positionable. By defining the axial position of one end face and one of these fixedly positioned end faces relatively displaceable Face, manufacturing-related inaccuracies can easily can be compensated, a suitable Eccentricity can be adjusted. The relative adjustability of the positionable Front side to the stationary front side on the carrier body leaves both a rotation of the positionable end face in the circumferential direction on the Carrier body to as well as their axial displacement relative to the other Face.

In an advantageous embodiment of the idea on which the invention is based provide the positionable end face with a clamping device. This can these contain a pressure body that can be preloaded axially by means of a locknut, of the axial force acting on the nut by means of a radial Deformation on a face that can be positioned relatively between and the support body recorded radially deformable sleeve transmits.

In one embodiment variant, the positionable end face on the carrier body than the carrier body and a predetermined journal on this overlapping sleeve-shaped element can be designed. The as a sleeve-shaped Element designed end face can in turn be used as a storage element for the Support body act. This can be done in one of the closest to the frame wall Area of the sleeve-shaped end face a storage element on The outer circumference of this sleeve-shaped element can be provided with which the support body can be stored in the frame wall.

To expose one end of the cylinder arrangement according to the proposed Invention is an end of the cylinder assembly by removing one of the Storage location of the cylinder assembly receiving fastener exposed from the frame side wall.

The solution according to the invention can preferably be in a printing unit Printing unit can be used, which for short runs with fast changing subjects is used, such as such printing units whose cylindrical surfaces are applied to toner images, for example photoelectric functional layers that wear a principle subject to.

The invention is explained in more detail below with the aid of the drawing.

Fig. 1

eine Zylinderanordnung mit Stirnseiten aufnehmendem Trägerkörper in Gestalt einer Achse und einer an den Stirnseiten zentrierten, eine die Funktionsschicht des Zylinders aufnehmenden Hülse,

Fig. 2

die Zylinderanordnung gemäß Fig. 1, gelagert in Seitenwänden einer Druckeinheit, wobei eine Stirnseite der Zylinderanordnung freilegbar ist.

It shows:

Fig. 1

a cylinder arrangement with a carrier body receiving end faces in the form of an axis and a sleeve centered on the end faces, a sleeve receiving the functional layer of the cylinder,

Fig. 2

1, mounted in the side walls of a printing unit, an end face of the cylinder arrangement being exposed.

1 shows a cylinder arrangement front-side supporting body and a centered on the front sides, the functional layer of the cylinder receiving sleeve.

The cylinder shown in FIG. 1 essentially comprises the cylinder cavity penetrating carrier body 1, and two on seat surfaces End faces 1 and 5, which are designed as centering flanges. To the in Direction of rotation on the centering flanges 2, 5 provided centering surfaces a cylinder sleeve 3 is added, on the top of which a functional layer 23 is formed, the one in electrographically operating printing units can be photoelectric layer. This layer is subject to Printing process inevitable wear and must therefore be replaced. In order to accomplish this exchange simply and inexpensively, the sleeve 3, whose outer surface carries the functional layer 3, on the centering surfaces of the Centering flange 2 or 5 non-positively received and can be from these after installing the centering flange 5, remove it again.

The centering flanges 2 and 5 are on the circumference of the carrier body 1 added. The centering flange 2 is the embodiment shown in FIG. 1 by means of a securing ring 14 on its seat on the carrier body 1 secured and supported with its hub on a collar of the carrier body 1 and is thus fixed in the axial direction. The centering flange is opposite 5 secured on its seat by a lock nut 18. The locknut 18 acts an annularly configured pressure body 24 and shifts it into axial Direction, according to the slope of the cooperating with the locknut 18 Thread 19 next to the pair of bearings 20. The annular pressure body 24 acts on a radially expanding sleeve which is deformable in the circumferential direction 24.1, with which the centering flange, which can be removed from the circumference of the carrier body 1 5 is set on its seat. The through the deformable sleeve 24.1 formed clamping device 9 below the centering flange 5 allows one exact axial positioning of the centering flange 5 relative to the carrier body 1, so that the eccentricity or the circumferential position of the cylinder sleeve 3 with Align functional layer 23 relative to axis of rotation 8 of carrier body 1 leaves.

In addition to the centering flange fixed on the carrier body 1 in a stationary position 2 shows a bearing accommodated on the bearing seat 16 of the journal 17, which is identified by reference numeral 15.

At the opposite end of the cylinder arrangement according to FIG. 1 is a Bearing pin 22 formed, the one received on a seat 21 Bearing pair 20 takes. The pair of bearings 20 is supported on the outlet of the thread 19 from which the lock nut 18 is rotatable, which in turn the Preloaded body 24. Due to the circumferential position of the locknut 18 on the Groove nut thread 19 can the bias of the deformable sleeve 24.1 can be preset below the centering flange 5 on the carrier body 1.

2 shows a cylinder arrangement according to FIG. 1 out, which is mounted in the frame walls of the printing unit.

On the centering flanges 2 and 5 on the circumference of the support body 1 either axially fixed or relatively positionable are included as Bevels designed centering surfaces. On the centering surfaces the centering flanges 2 and 5 are preferably formed as bevels, is the the functional layer 23 receiving cylinder sleeve 3 non-positively, however detachable, attached. 2 is on the pin 17 of the cylinder assembly a seat surface 16 is formed on which is formed here as a pair of bearings Bearing 15 is arranged. This is supported in a storage opening in the Frame part 10 of the printing unit. The centering flange 2 is on the circumference of the Carrier body 1 secured in the axial position by a locking ring 14, so that an axial position with respect to the circumference of the carrier body 1 is fixed.

At the opposite pin 22 of the cylinder arrangement according to FIG. 2 analogous to the representation according to FIG. 1, a thread 19 on which a lock nut 18 is rotatably arranged, the axial force on one Exerts pressure body 24. The axial force of the pressure body 24, applied by the Locknut 18 is transferred to a deformable sleeve 24.1, the deformation thereof in the radial direction for a bracing of the sleeve-shaped in FIG. 2 trained centering flange 25 ensures that the seat on the Carrier body 1 is positionable.

In contrast to the representation in Fig. 1, the centering flange 5 is a sleeve-shaped Centering flange 25 is formed, which in addition to the seat surface of the support body 1 overlapping section also a lock nut 18 or thread 19 overlapping section. At the end of this section of the sleeve-shaped Centering flange 25, a roller bearing 12 is accommodated, which is attached supports the wall 28 of a bore 27 in the fastening element 13. The Fastening element 13 in turn is provided with a circumferential collar 29, with which it is supported on the frame part 11 of the printing unit and, for example via fittings that are regularly arranged on the circumference of the federal government 29 are, can be fastened in the frame part 11.

Removal of the cylinder arrangement according to FIG. 2 from the printing unit are as follows: after loosening the connection between frame part 11 and Fastening element 13, for example by loosening screw connections, is the fastening element 13, the cylinder pin 22 in the axial direction sweeping over, removable from the printing unit. At the same time, the carrier body 1 in its position in the printing unit at the opposite end fixed so that the orientation of the axis of rotation 8 of the carrier body 1 in remains essentially unchanged. Then can by loosening the lock nut 18 Cancellation of the tensioning effect of the tensioning device 9 can be achieved; the Locknut 18 moves outwards, the pressure body 24 is relieved and the relaxed by the pressure body 24 previously deformed sleeve 24.1. By Relaxation of the deformable sleeve 24.1 by relieving the pressure body 24 after loosening the locknut 18, the sleeve-shaped centering flange 25 detachable on the carrier body 1. On the other hand, after removing the Fastening element 13 from the frame side 11 according to the cylinder arrangement Fig. 2, consisting of support body 1, axially fixed centering flange 2 and detachable positioned sleeve-shaped centering flange 25 with on their centering surfaces recorded cylinder sleeve 3 can be removed in total from the printing unit. Then the loosening of the lock nut 18 and removal can be shown of the sleeve-shaped centering flange 25 from the carrier body 1. After removal of the sleeve-shaped centering flange 25 from The circumference of the seat of the carrier body 1 can easily be the cylinder sleeve 3 having worn functional layer 23 is removed and by a refurbished, for example photoelectric Functional layer having properties, to be replaced or replaced by a new cylinder sleeve with an as yet unused functional layer 23 has photoelectric properties to be replaced. Parts that only one limited wear, such as the centering flanges 2 and 25, as well as the carrier body 1 can in the proposed from Fig. 2 Cylinder arrangement can be reused.

By designing the bevels on the centering flanges 2 and 25 configured centering surfaces, which have a mutually opposite bevel have, the axial position of the functional layer 23, formed on the Affect cylinder sleeve 3. Furthermore, the relative to the carrier body 1 in the axial direction centering flange 25 an eccentricity the functional surface 23 relative to the axis of rotation 8 of the centering flanges 2 or 5 and 25 receiving carrier body 1.

The solution proposed according to the invention allows one in a simple manner inexpensive replacement of a worn or heavily used one Functional surface 23, for example, one made of aluminum or one other material - an artificial peat material would also be conceivable can. The degree of coverage of the cylinder sleeve 3 complementary to that Centering surfaces of the centering flanges 2 or 5 formed bevels also be less than 100% and as part of the assembly of the cylinder assembly 2 when positioning the cylinder sleeve 3 on the centering surfaces the centering flange 2, 5 or 25 can be preset. Depending on the course of the Beveling of the centering surfaces on the peripheral surfaces of the end faces of the Centering flanges 2, 5 and 25 have a limited influence on the surface development of the cylinder arrangement according to FIG. 2 possible.

The fact that with that shown in Fig. 2 should not be left unmentioned Arrangement a replacement of the cylinder sleeve receiving the functional surface 23 3 both within and outside of a printing unit can be done. After exposure of the rack side 11, by removing the Fastening element 13 from the frame side 11 and one in the printing unit loosening of the lock nut 18, the sleeve-shaped can Centering flange 25 even with the carrier body 1 in remaining in the printing unit axial direction through the resulting opening in the frame side 11 be removed. The functional layer 23 is then picked up Cylinder sleeve 3 simply out of the opening by removing the fastener 13 is formed, laterally pulled out of the printing unit. An in suitably supported support body 1 can on the bearing pair 15 on the Frame side 10 remain in the bearing, as does the axially fixed one Centering flange accommodated on the circumferential surface 2.

Reference list

1

Carrier body

2nd

Centering flange

3rd

Cylinder sleeve

4th

Pressure hull

5

Centering flange

6

Centering surface

7

complementary centering surface

8th

Axis of rotation

9

Clamping device

10th

Frame part

11

Frame part

12th

Support bearing

13

Fastener

14

Circlip

15

camp

16

Camp seat

17th

Cones

18th

Locknut

19th

Slotted nut thread

20th

Bearing pair

21

Seat

22

Cones

23

Functional area

24th

Pressure hull

24.1

deformable sleeve

25th

Centering flange

26

camp

27

drilling

28

Bore wall

29

Bund of the fastener

Claims (16)

Cylinder with functional layer (23) with a carrier body (1) passing through the cylinder, on which two end faces (2; 5, 25) supporting a functional layer (23) receiving sleeve (3) are provided and the carrier body (1) is supported , characterized in that the sleeve (3) receiving the functional layer (23) can be centered relative to the axis of rotation (8) by centering surfaces (6, 7) formed on the end faces (2; 5, 25), at least one end face (2; 5 , 25) relative to the carrier body (1) is detachable. Cylinder according to claim 1, characterized in that the end faces (2; 5, 25) are provided with circumferential centering surfaces (6, 7) of the classes. Cylinder according to Claim 1, characterized in that the cylinder sleeve (3) contains centering sections (7) which are complementary to the centering surfaces (6) on the end faces (2; 5, 25). Cylinder according to claim 1, characterized in that the centering surfaces (7) on the cylinder sleeve (3) and the centering surfaces (6) on the end faces (2; 5, 25) are designed as bevels. Cylinder according to claim 1, characterized in that one of the end faces (2; 5, 25) on the carrier body (1) can be positioned relative to the other end face (2; 5, 25). Cylinder according to claim 5, characterized in that one of the end faces (2; 5, 25) can be positioned in the circumferential direction relative to the other end face. Cylinder according to claim 5, characterized in that one of the end faces (2; 5, 25) can be positioned axially on the carrier body relative to the other end face (2; 5, 25). Cylinder according to claim 1, characterized in that a tensioning device (9) is provided on one of the end faces (5, 25). Cylinder according to claim 8, characterized in that the clamping device (9) contains a sleeve (24.1) which deforms radially via an axially preloadable pressure body (4, 24). Cylinder according to claim 5, characterized in that the end face (5, 25) which can be pretensioned on its seat on the support body (1) relative to the other end face (2) is designed as a sleeve which overlaps the support body (1) and a bearing journal (22). Cylinder according to claim 10, characterized in that the end face (5, 25) of the cylinder designed as a sleeve acts as a bearing element for the carrier body (1). Cylinder according to claim 10, characterized in that a bearing element (26) on which the carrier body (1) is mounted in the frame wall (11, 13) is accommodated on the sleeve-shaped end face (25) of the cylinder. Cylinder with functional layer (23) with a carrier body (1) passing through the cylinder, on which two end faces (2; 5, 25) supporting a sleeve (3) receiving the functional layer (23) are provided and the carrier body (1) in support elements (10, 11, 13) on the frame, characterized in that the sleeve (3) receiving the functional layer (23) is formed by centering surfaces (6, 7) on the end faces (2; 5, 25) to the axis of rotation (8) can be centered, one end of the cylinder being exposed on the support element (13). Cylinder according to claim 13, characterized in that to expose one end of the cylinder arrangement (1, 2, 3, 5, 25) the fastening element (13) supporting the carrier body (1) can be detached from the frame part (11). Printing unit with a cylinder which contains a functional layer (23), with a support body (1) passing through the cylinder, on which two end faces (2, 5, 25) supporting the functional layer (23) are provided and the Support body (1) is supported in frame-side support elements (10, 11, 13), characterized in that the sleeve (3) can be centered relative to the axis of rotation (8) by centering surfaces (6, 7) formed on the end faces (2; 5, 25) , at least one end face (2; 5, 25) being detachable from the supporting body (1). Printing machine with a cylinder, with a support body (1) passing through the cylinder, on which two end faces (2; 5, 25) supporting a sleeve (3) receiving the functional layer (23) are provided and the support body (1) in support elements on the frame side ( 10, 11, 13), characterized in that the sleeve (3) can be centered relative to the axis of rotation by centering surfaces (6, 7) formed on the end faces (2; 5, 25), at least one end face (2; 5, 25) relative to the support body (1) is detachable.

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