EP1767362A2 - Device for accomplishing a roll change and the machine equipped with this device - Google Patents

Abstract

The device has a lift arm device (14) that comprises a right arm structure and a left arm structure for shifting a raster roller (1) between an operating position and a storage position. A storage device is provided for storing the lift arm device in a pivotable manner around a pivot axis. The pivot axis is arranged parallel to a rotation axis of the roller and an intermediate range is provided between the operating position and storage position.

Description

The invention relates to a device for accomplishing a roll change in a paint or coating unit of a sheet-fed printing machine with a lifting device comprising a left Hubarmstruktur and a right Hubarmstruktur. This device serves to displace a roller which can be exchanged into the printing press between a working position and a storage position, in particular for removal or replacement of that roller. The invention further relates to a printing machine which is equipped with such a roll changing device.

Out DE 199 62 425 B4 is a device for changing an anilox roller of a coating unit of a printing press with a Hubarmportal known. About this Hubarmportal an anilox roller can be taken in the region of its working position and initially raised in the vertical direction. Subsequently, the angled roller thus grasped and raised can be displaced in a horizontal direction in a region lying between the side frames of the printing press and deposited on a first or a second storage position adjacent thereto.

Out DE 198 19 389 A1 a coating unit for rotary printing presses is known, which is provided with a rotary magazine, in which a plurality of anilox rollers can be stored. The rotary magazine is provided with a cable pulling device, via which an anilox roller can be lowered from a downwardly pointing magazine compartment and moved partially manually into a working position.

Out DE 197 53 136 C2 a chambered doctor blade coating unit is known, the Includes rotary magazine, in which a plurality of anilox rollers are rotatably mounted. The roller bearings of the rotary magazine form the working bearings of the individual chamber rollers. By corresponding pivoting of the rotary magazine, it is possible to spend each an anilox roller of the same in a working position in which the anilox roller rests on an associated paint form cylinder.

The invention has for its object to provide solutions which make it possible to accomplish the change of a paint or other removable roller in a sheet-fed or sheet finishing machine in a particularly advantageous manner.

• einer Hubarmeinrichtung, die eine linke Hubarmstruktur und eine rechte Hubarmstruktur umfasst, zur Verlagerung einer Wechselwalze zwischen einer Arbeitsposition und einer Speicherposition, und
• einer Lagerungseinrichtung zur Lagerung der Hubarmeinrichtung in schwenkbewegbarer Weise um eine Schwenkachse, die im wesentlichen parallel zur Rotationsachse der zu wechselnden Walze ausgerichtet ist, wobei die Schwenkachse durch einen Zwischenbereich verläuft, der sich in vertikaler Richtung betrachtet zwischen der Arbeitsposition und der Speicherposition der Wechselwalze befindet.

Dadurch wird es auf vorteilhafte Weise möglich, ein maschineninternes Walzentransfersystem zu schaffen, das sich durch einen geringen Bauraumbedarf und einen großen Aktionsradius auszeichnet. Die erfindungsgemäße Vorrichtung kann in vorteilhafter Weise als relativ steifes Transfersystem ausgeführt werden und macht es möglich, die zu wechselnde Walze vollautomatisiert sorgsam aus der Arbeitsposition auszuheben oder die Walze in diese Arbeitsposition zu versenken. Der durch die Hubarmstruktur realisierbare Armhubweg kann nach einem entsprechenden Schwenken der Hubarmstruktur nochmals in gleichem Maße zur weiteren Verlagerung, insbesondere Anhebung der Walze genutzt werden kann. In besonders vorteilhafter Weise kann hierbei die Walze in einem oberen Bereich des Lack- oder Druckwerks abgelegt oder aus diesem Bereich entnommen werden. Auf diese Weise wird es insbesondere möglich den an sich gut zugänglichen oberen Druck- oder Lackwerksbereich als Walzenübergabebereich zu nutzen, wobei die ein- oder auszuwechselnden Walzen in diesen Walzenübergabebereich auch manuell eingelegt und in diesem Bereich offen bevorratet werden können.This object is achieved by a roll changing device for effecting a roll change in a paint or coating unit of a sheet-fed press with:

• a Hubarmeinrichtung comprising a left Hubarmstruktur and a right Hubarmstruktur, for displacing a removable roller between a working position and a storage position, and
• a bearing means for supporting the Hubarmeinrichtung in a pivotable manner about a pivot axis which is aligned substantially parallel to the axis of rotation of the roller to be changed, wherein the pivot axis passes through an intermediate region which is viewed in the vertical direction between the working position and the storage position of the removable roller.

This makes it possible in an advantageous manner to provide a machine-internal roller transfer system, which is characterized by a low space requirement and a large operating radius. The device according to the invention can advantageously be embodied as a relatively stiff transfer system and makes it possible to fully automatically lift the roller to be changed out of the working position or to sink the roller into this working position. The achievable by the Hubarmstruktur Armhubweg can after a corresponding pivoting of the Hubarmstruktur again to the same extent to the other Displacement, in particular lifting the roller can be used. In a particularly advantageous manner, in this case, the roller can be stored in an upper region of the paint or printing unit or removed from this area. In this way, it is possible in particular to use the per se readily accessible upper printing or coating unit area as a roll transfer area, whereby the rolls to be replaced or replaced can also be manually inserted into this roll transfer area and stored open in this area.

According to a particularly preferred embodiment of the invention, the storage device for mounting the lifting device on the side frame of the printing machine can be mounted. The assembly can be done by a mounting flange, which is preferably designed as such that it can be mounted on standard frame side provided sections, in particular over standard existing fitting and tapped holes. The roll changing device can be designed as a largely self-contained assembly, which can also be used later as part of a machine retrofitting in the manner of an "upgrade package" on montagetechnisch advantageous interfaces in the area lying between the side frames.

The left lifting arm structure and the right lifting arm structure are preferably designed such that the radial distance of the changing roller from the pivot axis is variable. The pivot axis is preferably located above the working position of the removable roller. The left lift arm structure and the right lift arm structure may be formed so that they are retractable, for lifting out the roller to be changed. The left lift arm structure and the right lift arm structure are further extendable radially to the pivot axis to insert the exchange roller in the working position.

The left and right Hubarmeinrichtung may be provided with gripping structures, in particular gripping heads to seize the change roller in the region of the axial ends, in particular bearing journals thereof. The left and right Hubarmeinrichtung can each form parts of a multi-arm Hubarmsterns.

This Hubarmstern can comprise two diametrically opposed Hubarmstrukturen, so that simultaneous handling of the roller to be inserted and the roller to be replaced is made possible. The lifting arm star can also carry other Hubarmstrukturen, in particular three, or four arms be formed. The control of the roll changing device can be carried out so that at least several phases in a plurality of rollers carried by this and this case, if necessary, also stored.

The lifting arms are designed according to a particularly preferred embodiment of the invention as a multi-stage telescopic cylinder. Preferably, the telescopic cylinders are connected to the Hubarmstern or the central hub device such that the outer cylinder are in the region of the inner cylinder connection, whereas the piston rods are guided outwardly movable in these outer cylinders. As a result, a particularly high flexural strength and rigidity of the handling system in the pivoting direction is ensured.

The telescopic cylinders can be designed as pressure medium, in particular pressure oil actuated hydraulic cylinder. Alternatively, or in combination with this measure, the telescopic cylinder can also be designed as a spindle, in particular ball screw cylinder. The cylinders of a Hubarmsystems are preferably synchronized by means of a synchronization device such that no inadmissible tilting or tilting of the corresponding roller occurs in the context of lifting or lowering. The synchronization is preferably realized by mechanical coupling systems such as spindles, link chains, timing belt or handlebars. Alternatively, it is also possible to metrologically detect the stroke state of the roller or the instantaneous radial stroke of the respective arm and make Hubkorrekturen based on regulatory approaches.

The lifting arms can also be designed as articulated arms, in particular buckling, or scissor articulated arms. The buckling can take place within an axial plane which includes the pivot axis of the system. It is also possible, the Hubarmeinrichtung be executed so that the buckling of the lifting arms takes place in each case in a plane radial to the pivot axis of the Hubarmsystems.

The control of the changing device can be carried out such that at least in phases lifting and pivoting movements are performed superimposed each other. In each case, the roller grasped by the lifting arm systems can be moved on a path which is optimized with regard to its course. The trajectory can be optimized in addition to the consideration of the criterion of collision avoidance, taking into account the mass forces and the time required. Alternatively, and control technology bewerkstelligbar with less effort, it is possible to operate the system so that initially only each to be handled roller is displaced radially by the cross-arm this cross-arm system relative to the pivot axis and pivoting takes place only when the roller is tightened. The initiation of the movements is preferably carried out with a soft start, so that excessive start-up and Abbremsstöße be avoided.

On the basis of the above-mentioned inventive concept for a machine-integrated roll changing device, a sheet-fed press is provided. This sheet-fed printing machine preferably comprises a bearing device for supporting a changing roller in a working position, wherein the bearing device comprises a roller-clamping device which is selectively engageable in a clamping position and in a release position, wherein in the clamping position, the changing roller is secured in that working position in a rotatably movable manner and can be removed from the storage device in the release position.

In conjunction with such a design of the storage device, it is possible to handle a roll change fully automated. The bearing device can be designed as a backup bearing with unilaterally open receiving shells. Details of this are from the date of the applicant DE 199 62 421 C1 known. It is also possible, the roller and the associated storage or clamping device in such a way that the voltage by axially displaceable Pratzen-, Überwurf-, or otherwise, the respective axial end of the roller bearing engagement structures takes place.

It is possible to form in the Hubarmsystem, in particular provided for gripping the rollers gripper devices so that there is an actuation of the provided for tensioning the roller in the working position roller tensioning device by this. For this purpose, the lifting arm system can comprise locking and unlocking devices by means of which the clamping device can be actuated. The lift arm system may include drive means to rotate the roller in a particular orientation. Such an auxiliary drive device can also be integrated into the printing machine as an assembly separate from the lifting arm system.

The roller gripper devices of the Hubarmsysteme can be designed so that they have engagement journal portions which are insertable into a radial opening of the rollers to be changed and temporarily locked therein. Such a design of the roller gripper devices is in the date of the applicant DE 199 62 443 C1 described.

As an alternative to the above-mentioned approach, it is also possible to design the roller gripper devices in such a way that they encompass or grasp the circumference of the roller in the area of axial ends or end pegs. In this approach, the roller can be taken without special consideration of the rotational position thereof.

The roll change system according to the invention can be designed so that it can be moved between the working position and the storage position by this roller, the web. It is possible, this web-controlled to make a temporary transfer of the roller in an intermediate position in which the roller is accessible to a cleaning device, so that an intermediate cleaning of the roller can be carried out prior to relocation of the same in the storage position. It is also possible to automatically pre-clean the items to be loaded To carry out roll by these brought before moving into the working position in one of the pre-cleaning serving intermediate position and here pre-cleaned, in particular dedusted and cleaned.

With regard to the gripper devices provided on the lifting arms, the device according to the invention can be designed such that not only the rollers to be changed but also other functional components of the printing press can be handled by them. The device according to the invention can in particular be designed such that it also cleans devices, in particular a cleaning module, or other components of a coating unit, e.g. a chamber doctor device is handled within the printing machine, or e.g. can be moved to a release position. It is also possible to provide a plurality of lifting arms, which have different and adapted to the respective hand-to-handle system component gripper or handling heads.

The storage position may be located in a roll storage area or represent a transfer position upstream of this. The roll storage area is preferably located at a location easily accessible to a user in the upper area of the printing press. The roll storage area can be located in particular above the upper machine panel. In this storage area, a tub device may be provided, in which any media draining from the rollers can be collected. A transfer magazine device can be provided in the roll storage area, in which the rolls can be stored in a defined manner and moved in a controlled manner into a position provided for take-up. The storage area and the path space accessible to the moving structures can be protected by detection organs, so that, for example, when an intrusion, in particular intervention of a user in the observed area, the issuing of a warning signal or a shutdown of the changing device takes place. These detection devices can be implemented by incorporating optical means, in particular light barriers, thermal imaging systems or proximity sensors. Instead of a full shutdown of the hazardous Systems can also be switched to an operating mode, for example, the speed of movement of the moving components is lowered, or, for example, provides more sensitive shutdown criteria. It is possible to provide display means by which the user is signaled that he is close, or possibly in an observed area, so that if necessary, the user can still withdraw from the observed area before a safety operating mode of the changing device is controlled.

The rollers can be equipped with an automatically readable coding or in particular with an optically or otherwise electromagnetically readable data carrier, from which roll-specific information can be read out or possibly also written down. A read or write head provided for data transfer can be integrated in the device according to the invention and positioned accordingly.

The pivot drive of the Hubarmsystems can be designed so that an alternating pivoting or a successive further rotation of the Hubarmsystems done. Activation of the rotary actuator Success preferably program-based according to selectable procedures. It is possible to carry out the control of the changing device from a machine control station. Alternatively, or in combination with this measure, a control from the immediate vicinity of the corresponding printing or coating unit can take place. In particular, in a control from the immediate environment, the individual processes, in particular the pivoting of the Hubarmsystems, lowering or raising the roller in or out of the working position and unlocking the roller tension are performed so slowly that the operator side a visual control of the process and possibly intervention is possible.

Figur 1

eine Schnittdarstellung zur Veranschaulichung des Aufbaus einer erfindungsgemäßen Vorrichtung sowie der Integration derselben in eine Druckmaschine;

Figur 1

eine Schemadarstellung zur Erläuterung der über die erfindungsgemäße Vorrichtung realisierbaren Transferbewegungen, die als solche der Verlagerung der Wechselwalze zwischen einer Arbeitsposition und einer Speicherposition dienen;

Figur 3a

eine Skizze zur Veranschaulichung einer einarmigen Variante der Hubeinrichtung;

Figur 3b

eine Skizze zur Veranschaulichung einer zweiarmigen Variante der Hubeinrichtung;

Figur 3c

eine Skizze zur Veranschaulichung einer dreiarmigen Variante der Hubeinrichtung;

Figur 3d

eine Skizze zur Veranschaulichung einer vierarmigen Variante der Hubeinrichtung;

Figur 4

eine Skizze zur Veranschaulichung der Koppelung der linken und der rechten Hubarmeinrichtung über eine Quertraverse.

Further details and features of the invention will become apparent from the following description taken in conjunction with the drawings. Show it:

FIG. 1

a sectional view for illustrating the structure of a device according to the invention and the integration thereof into a printing machine;

FIG. 1

a schematic representation for explaining the realizable via the device according to the invention transfer movements, which serve as such the displacement of the exchange roller between a working position and a storage position;

FIG. 3a

a sketch illustrating a one-armed variant of the lifting device;

FIG. 3b

a sketch illustrating a two-armed variant of the lifting device;

Figure 3c

a sketch illustrating a three-armed variant of the lifting device;

3d figure

a sketch illustrating a four-armed variant of the lifting device;

FIG. 4

a sketch illustrating the coupling of the left and the right Hubarmeinrichtung via a cross-beam.

Figure 1 shows a roll changing device for effecting the change of a here designed as an anilox roll changing roller 1 in a coating unit 2 a sheetfed press.

The sheet-fed press comprises in a conventional manner a sheet feed table 3, a pre-gripper 4 and a here with a double-sized cylinder 6 cooperating transfer cylinder 5. On the cylinder 6 runs a paint form cylinder 7. The over the paint form cylinder 7 lacquered sheet is from the cylinder. 6 transferred to a drum 8. The running direction of the sheet is indicated in Figure 1 by small arrow symbols.

By means of said exchange roller 1, an application of the lacquer picked off from a chamber doctor device 9 by the surface structure of the change roller 1 takes place on the lacquer-forming cylinder 7.

The chambered scraper device 9 is movably supported by a pivoting mount 10 in such a way that the chambered scraper device 9 can be brought into a release position, as indicated by the arrow symbol P1, in which a subsequent removal or insertion of the exchangeable roller 1 into the working position I is made possible.

The actual coating unit 2 is located below a cover 11. The cover 11 is formed such that it temporarily exposes a window section 12 through which the replacement roller 1 can be moved into the enclosed area or out of it.

The roll changing device integrated in the printing press 13 comprises a lifting arm device 14 which comprises a left lift arm structure 15 and a right lift arm structure 16 (see FIG. 4). The Hubarmeinrichtung 14 allows a displacement of the removable roller 1 between a working position I and a storage position III.

The roller changing device further comprises a bearing device 17 for supporting the Hubarmeinrichtung 14 in a pivotable manner about a pivot axis S, which is aligned substantially parallel to the axis of rotation of the roller 1 to be changed. The pivot axis S passes through an intermediate region, which is located in the vertical direction between the working position I and the storage position III of the removable roller.

The storage device 17 for mounting the Hubarmeinrichtung 14 is mounted on the side frame of the printing press 13. The left Hubarmstruktur 15 and the tengestell the printing press 13 mounted. The left Hubarmstruktur 15 and the right Hubarmstruktur 16 are formed such that the radial distance of the exchange roller 1 from the pivot axis S is changed by appropriate control of the roll changing device.

The pivot axis S is located above the working position I of the change roller I. To lift out the change roller 1, the two Hubarmstrukturen 15, 16 are retracted, so that the change roller 1, the pivot axis S approaches.

After complete retraction of the change roller 1, the Hubarmstruktur 15, 16 are pivoted about the pivot axis S, so that the change roller here comes into positions II or IV. In these positions II or IV, the changing roller can optionally be treated automatically, in particular cleaned.

The lifting of the removable roller 1 is carried out by being gripped in the region of its axial ends. The Hubarmstrukturen 15, 16 are provided for this purpose in the region of its outer ends with gripping structures for gripping the removable roller.

The Hubarmstrukturen 15, 16 may form part of a multi-arm Hubarmsterns. The Hubarmstrukturen are executed in the embodiment shown as a telescopic cylinder.

The sheet-fed printing machine 13 equipped with the aforementioned roll changing device is provided in the region of the bearing point of the exchange roll 1 with a clamping device which can be brought selectively into a clamping position and into a release position. In the clamping position, the change roller 1 is secured in that working position I in a rotatably movable manner. In the release position, the removable roller 1 can be removed from the associated storage system. The storage system can be designed for this purpose as a catch bearing with unilaterally open receiving shells.

The storage position III is located in an upper roll storage area WAB in which several removable rollers can be stored. It is possible to provide here a magazine device through which the rollers are movable into a Aufgriffsstellung suitable for engagement by the Hubarmstrukturen 15, 16 Aufgriffsstellung.

In the roll storage area, the rolls accommodated there are preferably supported in the area of their bearing journals. These journals can hereby rest on both sides vorgesehnen bearing tracks 18.

The roll transfer which can be accomplished within the printing machine by means of the roll changing device according to the invention is illustrated schematically in FIG.

To remove a (here indicated only by the bearing pin) roller 1 from the working position I, the Hubarmstern is first pivoted about the pivot axis S such that the provided for lifting the roller 1 Hubarmpaar is directed to the roller 1 out. Subsequently, the Hubarmpaar is lengthened until the gripper heads of the same engage in corresponding opposite sections of the roller 1. The roller 1 is now unlocked in the area of their bearings, so that it is released for subsequent lifting. In parallel with this, an application device, in particular a chamber doctor device, possibly resting on the roller 1 can be lifted off the roller 1.

The now taken and released in their storage roller is raised. For this purpose, the Hubarmpaar, as indicated by the arrow K1, retracted and the roller 1 approaches the pivot axis S.

As soon as the roller 1 has reached the position I ', the pair of lifting arms is pivoted in accordance with the arrow T2 so that the roller 1 reaches the position II. In this position, or in an adjacent position, the roller 1 can be supplied to a cleaning device.

By further pivoting - arrow T3 - of the roller carrying pair of lifting arms the roller enters the position III 'which is located in the vertical direction above the pivot axis S. The Hubarmpaar can now be controlled so that the radial distance of the roller 1 to the pivot axis S increases again (arrow E4). In this case, the roller 1 is displaced into an upper region III of the printing press.

In this upper region, the roller can be released and move in a substantially horizontal direction to a storage position, as indicated by the arrows L1, L2. It is possible to move the roller to a certain storage position by positioning aids or e.g. To support a belt or chain drive, so that the final storage position is achieved positively controlled.

For automated picking up of a roller from the upper area of the printing press, the roller is first moved to position III. There she is picked up by a Hubarmpaar. The now gripped roller is lowered as indicated by the arrow K5, by the lifting arms are retracted.

As soon as the roller has reached position III ', the lifting arm system is pivoted (arrow T6) until the roller reaches position IV. In this position, the roll to be loaded can be pretreated as required, e.g. Dedusted and cleaned.

In the following, the roller is further pivoted (arrow T7) until it reaches the position I '. Here the roller is above the working position I.

Now, the roller is lowered by expanding the lifting arms in the working position I. During lowering, the receiving mounts provided for receiving the roll end pegs are brought into a receiving state, which allows a sinking of the roll. Subsequently, the roll is stored in the receiving warehouse, e.g. tensioned by axial insertion of a locking member.

After locking the roller in the working position ancillaries the roller, for example, a chamber doctor blade device are made to the roller.

In a multi-arm design of the Hubarmsystems, in particular with two mutually diametrically opposite each other with respect to the pivot axis lifting arms provided for the extraction and the insertion of the roller movements can be performed at least in phases simultaneously, so that the process of roll change can be carried out particularly time-saving.

It is possible to design the lifting arm system so stiff that a sufficiently precise positioning of the gripping devices is achieved by correspondingly precise control of the movement sequences. Alternatively, however, it is also possible to provide stationary guide structures on the frame side, which ensure exact guidance and positioning of the structures relevant to the grip, at least in the positions of the gripping heads which are relevant for gripping or releasing the roller.

By means of the roll changing system according to the invention, it is also possible, if appropriate, to operate other depositing positions Q1, Q2, which are located in particular within the machine protection, by means of appropriate path control.

In Figure 3a sketchy a Hubarmsystem is shown, which has only one lift arm 15 (A-side) and 16 (B-side) for each frame side. The lifting arm is designed as a telescopic cylinder. It is possible to design and arrange the cylinder so that it passes through the pivot axis S and projects rearwardly beyond the hub region 15N. The supernatant can be dimensioned so that this almost corresponds to the radial distance of the tip of the gripping head 18 of the pivot axis S in the retracted state.

FIG. 3b shows a two-armed variant of the lifting arm system. The lifting arms 15A, 15B are arranged diametrically opposite one another.

FIG. 3c shows a three-armed variant. The lift arms 15A, 15B and 15C are mounted at the same circumferential pitch on the hub portion 15N. It is possible to otherwise define the pitch and thus correlate certain rotational positions of the Hubarmsystems and positions of transfer and possibly treatment stations.

In figure 3d a three-armed variant is shown. In particular, in this variant, the Hubarmsystem can act as an intermediate magazine, in which three rollers can be stored and still a Hubarmpaar for lifting the roller from the working position is available.

FIG. 4 shows in sketch form the position of a Einarmsystems according to Figure 3a within a printing press. The A- and B-side frames adjacent lifting arms 15, 16 are connected to each other via a cross-beam 19. The cross-beam 19 is designed here as a relatively torsionally rigid structure and extends concentrically to the pivot axis S. The cross-beam 19 may also be formed as a bow-like structure, which in this case extends offset on a lifting arms 15, 16 side facing away from the pivot axis.

It is possible to incorporate in the cross-beam 19 a pivot drive, via which, for example via a torsion cylinder, a required for pivoting the Hubarmportals drive torque can be applied.

The device according to the invention is particularly suitable for use in sheet-fed rotary printing presses with flexographic printing or coating units in chamber doctor blade / screen rolling technology. It is also particularly suitable for sheet-fed offset printing presses with upstream, downstream and intermediate lacquer or flexo-works for in-line finishing or pre-coating.

On the basis of the concept according to the invention, a machine-integrated handling device (in particular a machine-integrated anilox roller changing machine) is provided which provides component transfer with high dynamics allows. The device according to the invention is preferably actuated partially automatically from the control station, either fully automatically or also near the module, possibly under the control of the operator.

The storage structures provided for incorporation into the printing press are preferably fixed to the side stand fixed to the A and B sides of the printing press.

As stated, the lifting arms can be realized as a telescoping cylinder system extending and retracting vertically. The drive of the same is preferably carried out pneumatically. The drive of the lift arms can also be hydraulically or otherwise mechanically, e.g. via Kugelgewinde- or parent structures.

At the outer end of the lifting arms, lifting bolts or other catching devices, e.g. Ball locking bolt, in particular ball release lock bolts be provided, which engage in the cylinder side provided pin bores and can be locked in this pin bore. The disengagement of the balls can be done by pins which are movable in the axial direction within the Aushebebolzens and disengage the associated balls via a shoulder device in the radial direction. The engagement of the rollers can also be done by other gripper or hook systems. The movement sequence can be protected by protective systems. The course of the opening of the machine protection for the passage of the roller can be controlled so that only briefly and only a sufficient opening of the protection takes place. Also, the lagklemmung can be automated in terms of process or automatically canceled or caused by special design of the mechanics.

In the region of the transverse deposit, the rollers can be arranged displaceably. In this area, a cleaning station, alternatively, at least one cleaning trough can be arranged. The device according to the invention also makes it possible to handle the change of large rolls by shortening one-man operation by one-man operation.

The device according to the invention can be adapted to a wide variety of format widths and series with minimal modification requirements. Due to the small space requirement, it can be integrated into existing printing press concepts without changing the side stand contour and changing the lateral machine protection.

LIST OF REFERENCE NUMBERS

1

replacement roll

2

coating unit

3

Sheet supply table

4

pregrippers

5

Transfer cylinder

6

cylinder

7

Coating form cylinder

8th

drum

9

Chamber doctor device

10

swiveling holder

11

cover

12

window section

13th

press

14

lift arm

15

Hubarmstruktur

15A

lifting arm

15B

lifting arm

15C

lifting arm

16

Hubarmstruktur

17

storage facility

S

swivel axis

18

gripping head

19

crossbeam

Claims (17)

Device for effecting a roll change in a paint or coating unit of a sheet-fed printing press (13) with: - A Hubarmeinrichtung (14) comprising a left Hubarmstruktur (15) and a right Hubarmstruktur (16) for displacing a removable roller (1) between a working position (I) and a storage position (III), and - A storage device (17) for supporting the Hubarmeinrichtung (14) in a pivotable manner about a pivot axis (S) which is aligned substantially parallel to the axis of rotation of the roller to be changed (1), wherein the pivot axis (S) passes through an intermediate region, which is located in the vertical direction between the working position (I) and the storage position (III) of the removable roller (1). Apparatus according to claim 1, characterized in that the storage device (17) for mounting the Hubarmeinrichtung (14) on the side frame of the sheet-fed printing machine (13) is mounted. Apparatus according to claim 1, or 2, characterized in that the left Hubarmstruktur (15) and the right Hubarmstruktur (16) are formed such that the radial distance of the exchange roller (1) from the pivot axis (S) is variable. Device according to at least one of claims 1 to 3, characterized in that the pivot axis (S) is located above the working position (I) of the exchange roller (1), and that the left Hubarmstruktur (15) and the right Hubarmstruktur (16) are retractable , for lifting out the roller to be changed (1). Device according to at least one of claims 1 to 4, characterized in that the pivot axis (S) is located above the working position (I) of the exchange roller (1), and that the left Hubarmstruktur (15) and the right Hubarmstruktur (16) radially to Swivel axis (S) are extendable, for inserting the removable roller (1) in the working position (I). Device according to at least one of claims 1 to 5, characterized in that the left and right Hubarmstruktur (15, 16) with gripping heads (18) are provided for gripping the removable roller (1) in the region of the axial ends, in particular journals thereof. Device according to at least one of claims 1 to 6, characterized in that the left and right Hubarmstruktur (15, 16) each form part of a multi-arm Hubarmsterns. Device according to at least one of claims 1 to 7, characterized in that the Hubarmstrukturen (15, 16) are designed as a telescopic cylinder. Sheet-fed printing machine with a roll changing device according to at least one of the preceding claims with a bearing device for supporting a replacement roll in a working position (I), wherein the bearing device comprises a clamping device which can be brought selectively into a clamping position and into a release position, wherein in the clamping position the interchangeable roll ( I) is secured in that working position in a rotatably movable manner, and in the release position from the storage device can be removed. Sheet-fed printing machine according to claim 9, characterized in that the bearing device is designed as a fishing camp with unilaterally open receiving shells. Sheet-fed printing machine according to claim 9 or 10, characterized in that the storage position is located in a roll storage area. Sheet-fed printing machine according to at least one of claims 9 to 11, characterized in that the control of the changing device from the region of the machine control center can be veranlassbar. Sheet-fed printing machine according to claim 12, characterized in that the control of the changing device takes place taking into account machine operating state parameters. Sheet-fed printing machine according to claim 14, characterized in that by interrogation of machine operating state parameters enable signals can be generated on the basis of which the sequence of roll change can be initiated or coordinated. Sheet-fed printing machine according to at least one of claims 12 to 14, characterized in that the device for changing rolls is connected in terms of control technology to the machine control station such that running movement commands and clearances can be entered from the area of the machine control station. Sheet-fed printing machine according to at least one of claims 12 to 15, characterized in that the control of the device for roll change takes place with the involvement of a drainage safety concept, to avoid hazardous or damage relevant operating situations. Sheet-fed printing machine according to at least one of claims 12 to 16, characterized in that the control of the device for roll change takes place under the process-technical integration of an air duct concept, to avoid or at least substantially suppress emissions in the

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