Display and method for laying down bows, and use of differently wide, circumferentially guided brake bands

Description

[0001] The invention relates to a delivery unit for a sheet-processing machine with a sheet brake having axially adjustable brake stations, a method for depositing sheets in a delivery unit of a sheet-processing machine with a sheet brake having axially displaceable brake stations, and the use of brake bands of different widths, guided circumferentially, on support bodies arranged opposite each other of an axially displaceable brake station of a sheet brake.

[0002] From DE 198 35 003 A1 a boom for a printing press is known, wherein a suction belt of a sheet brake is replaced by a support belt which is not subject to a vacuum.

[0003] From DE 101 40 825 A1 a method for adjusting guide elements for planar material based on print image information is known, wherein the job-specific optimal positioning position for the positioning of sheet guide and sheet conveying elements is determined using the job-specific print image information known from the prepress stage.

[0004] From DE 10 2006 035 693 A1, a bow braking system for braking pressure bows is known, wherein in one operating mode two brake modules are coupled to a module carrier. Unused pneumatic connections are shut off separately via multi-way valves.

[0005] From DE 10 2010 002 500 A1, a device for handling, namely for guiding and / or braking, sheets in a sheet-processing machine is known, wherein all energy required for the operation of the device, in particular electrical energy and / or pneumatic energy, is made available to the device via a base module. A pneumatic opening of the base module can be closed by an elaborately shaped and separately fixed adapter module, which does not require suction or blowing air.

[0006] From DE 10 2011 076 975 A1 a sheet-processing machine with a sheet brake and a method for operating it is known, wherein at least one detection means is provided with which the presence of a unit, the type of unit used and / or the arrangement of the unit with respect to a station can be detected.

[0007] From DE 10 2011 080 196 A1, a delivery unit of a sheet-processing machine with a sheet brake is known, wherein sheet brake stations have guide units for strips. The guide units have adjustable strip guides, wherein a wide strip can be guided in one position of the strip guide and a narrower strip in another position.

[0008] From DE 10 2012 206 927 A1, a delivery system for a sheet-processing machine and a method for depositing sheets are known, wherein a means for influencing the suction air supply to a sheet contact element is provided, with which at least one further function on the sheet brake can be controlled. The suction air of a suction ring, a pre-suction opening of a suction plate, and a suction channel of the suction plate can be pulsed.

[0009] From DE 10 2015 213 094 A1, a braking station and a method for operating a braking station of a sheet brake in the delivery of a sheet processing machine are known, wherein the braking station includes a connection surface, wherein interchangeable functional units can be assigned to the connection surface, wherein at least one position securing element for securing the position of a functional unit is provided on the connection surface and wherein the position securing element has an air guide channel.

[0010] From DE 10 2016 206 687 A1, a braking station for a sheet brake in the delivery of a sheet-processing machine and a method for depositing sheets are known, wherein a guide surface of a braking station for a circumferentially guided braking element has a first guide plane and at least one guide area spaced apart from the first guide plane. The braking station can further develop by having mirror-image support elements for identical or different functional units.

[0011] From DE 10 2017 204 516 A1, a delivery unit of a sheet-processing machine with a sheet brake comprising a brake station and a method for depositing sheets are known, wherein a brake element or a sheet support element having a friction-minimized surface can be interchangeably assigned to a brake station.

[0012] From DE 10 2018 210 774 A1, a display and a method for compensating disturbance moments when operating a bow brake in a display are known, wherein the bow brake is assigned a compensation device for compensating at least one disturbance moment when displacing a bow contact element.

[0013] DE 10 2018 210 651 A1, DE 10 2011 017 553 A1 and DE 10 2016 206 693 A1 each disclose a delivery unit for a sheet-processing machine with an axially adjustable sheet brake having brake stations, with transport systems for transporting sheets of a sheet format in the transport direction over the sheet brake to a delivery stack, wherein at least one brake station has several support bodies with connecting surfaces.

[0014] The invention is based on the objective of creating an alternative delivery system for a sheet-fed printing machine or an alternative method for placing sheets in the delivery system of a sheet-fed printing machine. In particular, it aims to achieve a significantly improved response to the substrates being processed and / or a significant increase in the performance of a sheet-fed printing machine, for example, a sheet-fed printing press.

[0015] The problem is solved according to the invention by the features of independent claims 1, 10 and 15.

[0016] The advantages achievable with the invention consist in particular of providing an alternative delivery system for a sheet-fed processing machine or an alternative method for depositing sheets. In particular, it enables significantly better adaptation to the substrates being processed and / or a substantial increase in the performance of a sheet-fed processing machine, for example, a sheet-fed printing press. A corresponding sheet-fed processing machine, in particular a sheet-fed printing press, equipped with such a delivery system is also provided.

[0017] In particular, the system should enable the exchange of suction strips at the at least one braking station of the arc brake. Furthermore, it should preferably ensure that different suction strips can be used, for example, by allowing a change from a wide braking element to a correspondingly narrow braking element, or vice versa. This advantageously enables the use of suction strips of different widths on one and the same braking station. At the same time, the system preferably enables the use of a support belt and a suction belt on the braking station. The use of two support belts on the braking station should also be possible.

[0018] The flexibility in configuring at least one, several, or all of the braking stations allows for significantly improved adaptation to the substrate being processed. In particular, high processing speeds can be achieved when processing heavy materials, such as varnished reverse prints, through the use of wide suction belts. Narrow belts are especially suitable for fast reprints and when processing glossy materials. The use of a narrow belt and a support belt is also possible.

[0019] Exemplary embodiments of the invention are shown in the drawings and are described in more detail below.

[0020] They show: Fig. 1 Delivery of a sheet-processing machine with a sheet brake and non-stop device arranged in front of a delivery stack; Fig. 2 Perspective view of a sheet brake with axially displaceable double brake stations guided on a guide beam; Fig. 3 Cross-section of a double brake station guided on the guide beam; Fig. 4 Double brake station equipped with wide brake bands; Fig. 5 Double brake station equipped with narrow brake bands; Fig. 6 Double brake station equipped with one wide and one narrow brake band; Fig. 7 Detail of a perspective view of the sheet brake with various elements associated with the double brake stations.

[0021] The Fig. 1 For example, the figure shows a section of a delivery unit 01 of a sheet-fed processing machine, in particular a sheet-fed printing press, specifically a sheet-fed offset rotary printing press, preferably in aggregate and series construction.

[0022] The delivery unit 01 contains a sheet transport system 02, which transports the sheets 02 printed, varnished, processed, etc. in the printing press to a delivery stack 04. This transport system is preferably designed as a chain transport system with two delivery chains, each guided laterally on the frame of the delivery unit 01, between which gripper carriages 03 are arranged. The gripper carriages 03 have sheet fixing systems with which the sheets 02 to be transported are gripped at the leading edge. The gripper carriages 03 are guided by the delivery chains on a gripper carriage track in the transport direction T until they reach the delivery stack 04, where the gripper carriages 03 release the sheets 02 for placement.

[0023] On the sheet transport path to the delivery stack 04, sheet guide plates are preferably arranged in the delivery 01 below the sheet transport plane. These guide plates direct the sheets 02 towards the delivery stack 04. The sheet guide plates have a surface that is at least approximately closed for sliding and / or floating guidance of the sheets 02. Furthermore, nozzle openings for pneumatically guiding the sheets 02 can be assigned to the sheet guide plates. The printing press is particularly equipped with a perfecting device and is preferably designed to be switchable between perfect printing and double-sided printing modes. An air cushion can be formed between a sheet guide plate and the sheets 02 transported over it, particularly in double-sided printing mode.In particular, a nonstop device with an auxiliary stack carrier, for example a nonstop roller blind 26, which can be inserted into the area of ​​the delivery stack 04 in the transport direction T, is arranged in the display 01 for uninterrupted stack change.

[0024] In the delivery unit 01, a sheet brake 05 is arranged upstream of the delivery stack 04 in the transport direction T. This brake takes the sheets 02 to be deposited from the gripper carriages 03 and, after their release, decelerates them from machine speed to depositing speed. After deceleration by the sheet brake 05, the sheets 02 are aligned against front, rear, and / or side edge stops and neatly deposited onto the delivery stack 04. The delivery stack 04 is preferably lowered by a stack lift drive (not shown) during the sheet depositing process such that the stack surface forms an at least approximately constant depositing level for the incoming sheets 02. The sheet brake 05 includes at least one and preferably at least two double braking stations 06, which are arranged to be axially displaceable, i.e., transversely to the transport direction T. Additionally, one or more single braking stations or...Double braking stations 06, for example at least three or exactly three, four, five or, depending on the format, even more braking stations, are used.

[0025] In perfecting mode, the braking stations can be optimally positioned across the machine width, as they only come into contact with the unprinted sides of the sheet. For double-sided printing, in particular, the braking stations can be repositioned axially. They can be placed on a lateral, usually unprinted, sheet edge, on unprinted corridors, and / or on sufficiently dried ink areas, for example, in UV printing. This repositioning can be done manually or, preferably, by motor. For example, an actuator, especially one with spindles, can reposition the braking stations. Each braking station can have its own drive. Unneeded braking stations can be deactivated and / or moved out of the sheet area.

[0026] The Fig. 2 Figure 1 shows a perspective view of a sheet brake 05 with double braking stations 06, for example, as described above. The double braking stations 06 of the sheet brake 05 can each accommodate at least, or exactly, two brake bands 17, which are mounted around at least two, preferably three, deflection rollers. Such a brake band 17 preferably interacts pneumatically with the sheets 02 transported via the sheet brake 05. In particular, the sheets 02 are brought into contact with a brake band 17 and / or held in place by suction air, so that contact is established between the brake band 17 and the respective sheet 02. The brake band 17 moves, at least temporarily, at a lower speed than the machine speed and accordingly decelerates each sheet 02 released by the gripper carriage 03.The brake band 17 is assigned at least one drive that drives or decelerates it at a constant or variable speed reduced compared to the machine speed. Preferably, however, the brake band 17 is operated dynamically and / or periodically between at least approximately the machine speed and a lower deposition speed. Preferably, the drive can drive or decelerate several or all brake bands 17 of the double brake stations 06. Alternatively, each double brake station 06 could also be assigned a separate drive.

[0027] The sheet brake 05 is mounted in a separate frame and is designed to be movable in and against the transport direction T for adjustment to different sheet formats. A crossbeam, preferably extending across the machine width, is arranged on a side facing the stacking area. This crossbeam, designed here as a trailing-edge crossbeam 18, is associated with the sheet brake 05. The trailing-edge crossbeam 18 preferably carries several trailing-edge stops 19, each pivotally mounted about a pivot axis oriented in the transport direction T. By moving the sheet brake 05 in or against the transport direction T, the sheet brake 05 and the trailing-edge stops 19 are jointly adjusted to the current sheet format.

[0028] Preferably, the trailing edge traverse 18 and / or a further traverse 20 of the sheet brake 05 are rigidly connected to the respective signs 21 arranged laterally in the area of ​​the delivery frame. Within or outside the area of ​​a maximum sheet format width, a guide traverse 10 for the double braking stations 06 can be connected to or supported by the signs 21.

[0029] Preferably, the rear edge crossbeam 18 and / or the further crossbeam 20, or connecting elements, extend beyond the signs 21 such that they pass through openings in the frame wall of the side display rack. Particularly preferably, the rear edge crossbeam 18 and / or the further crossbeam 20, or the connecting element, is received outside the display rack by a fixing plate 22, which is supported against the frame wall. The fixing plates 22, preferably arranged on both sides outside the display rack, are held or mounted so that they can be moved or slid relative to the frame wall, particularly in and against the direction of transport T. The fixing plates 22 can be mounted, for example, by means of strips.

[0030] The illustrated sheet brake 05, for example, includes five double braking stations 06, which can be axially displaced or moved along the guide traverse 10, arranged transversely to the transport direction T, by an actuator. The guide traverse 10 is preferably arranged approximately centrally to the double braking stations 06 when viewed in the transport direction T and is connected, in particular, to the lateral plates 21, which can be moved in or against the transport direction T for format adjustment. In particular, the guide traverse 10 is thus fixed to the frame but adjustable in format. The guide traverse 10 extends at least over the maximum sheet format to be processed and supports all braking stations, in particular all double braking stations 06, of the sheet brake 05.

[0031] The actuator for axial adjustment of the double brake stations 06 of the arc brake 05 can, for example, have spindle drives 23 arranged outside the plates 21, which are particularly independently controllable and each assigned to a double brake station 06. For example, the spindle drives 23 are arranged outside the delivery frame. Preferably, the spindle drives 23 can be attached, in particular screwed, to a fixing plate 22 located, for example, on the operator side of the machine, outside the delivery frame. The arc brake 05 further comprises a first drive, in particular a first square shaft drive 08, for driving all brake bands 17 and preferably a second drive, in particular a second square shaft drive 09, for pneumatically controlling all brake bands 17.

[0032] A servomotor 24, for example, can be used as a drive for the square shaft of the first square shaft drive 08. Preferably, the servomotor 24 can be mounted, in particular screwed, outside the frame on a fixing plate 22, for example, located on the drive side of the machine. Furthermore, the drive can interact with a control unit, for example, the machine control, via which a desired depositing speed and / or, if necessary, the movement profile of the brake bands 17 can be set and modified. This allows the sheet brake 05 with the double brake stations 06 to be adapted to different pressure conditions. Alternatively, a separate drive can also be assigned to each double brake station 06.

[0033] The square shaft of the second square shaft drive 09 can, for example, be driven at a single speed by a servo motor 25. Preferably, the servo motor 25 can be mounted, in particular screwed, outside the frame on a fixing plate 22, for example, located on the drive side of the machine. The drive movement of the servo motors 24, 25 is preferably adjustable and / or adaptable to the sheet sequence. For example, a synchronous pneumatic control of one or more pneumatic connections, in particular the control of the suction air supply, the brake bands 17 of a double brake station 06, and in particular all double brake stations 06 simultaneously, can be carried out by means of a rotating rotary valve.

[0034] The Fig. 3 Figure 1 shows a cross-section of a double brake station 06 of the arc brake 05, wherein the actuator for axial adjustment includes, in particular, a threaded spindle 12 for each double brake station 06, which can be driven by one of the spindle drives 23, for example, via a cardan coupling. Each double brake station 06 is connected to its respective threaded spindle 12 via an associated actuating element 13 and is axially displaced by this actuating element 13 when the threaded spindle 12 rotates. Each actuating element 13 has, in particular, exactly one connection point, in particular an engagement point, with a threaded spindle 12. The threaded spindles 12 of the other double brake stations 06 are guided through bores without engagement with the actuating element 13.

[0035] The double brake station 06 is preferably connected to the associated actuating element 13 such that it is guided on the guide traverse 10 by means of guide surfaces 14 of the actuating element 13, with the actuating element 13 supporting the double brake station 06. The double brake station 06 includes a base body 07, which is mounted on the guide traverse 10, which extends across the width of the machine, i.e., transversely to the transport direction T. The double brake station 06 is mounted so as to be displaceable or slidable along the guide traverse 10, which is here preferably profiled. The guide traverse 10 is, for example, tubular around the actuator and could alternatively be designed as a downwardly open U-profile, at least partially enclosing the actuator.

[0036] The base body 07 of the double brake station 06 is associated with a first output element, here a gear of a gear stage, which is operatively connected to the square shaft of the first square shaft drive 08. The brake bands 17 associated with the base body 07 can be driven cyclically via the first output element. Preferably, all brake bands 17 associated with the double brake stations 06 of the arc brake 05 are driven together by a rotational movement of the square shaft of the first square shaft drive 08, which is arranged across the width of the machine. The square shaft of the first square shaft drive 08 is arranged parallel to the guide traverse 10 and is preferably in contact with surfaces of the output elements that receive the square shaft at each double brake station 06 of the arc brake 05.The surfaces of the output elements of the double brake stations 06 slide accordingly on the outer contour of the square shaft during its axial adjustment.

[0037] The base body 07 is further assigned a second output element that is operatively connected to the square shaft of the second square shaft drive 09. A cycle-controlled pneumatic system for the brake bands 17 of the double brake station 06 can be implemented via the second square shaft drive 09. A rotary valve assigned to the double brake station 06 can also be actuated for pneumatic control via the second square shaft drive 09. Preferably, all brake bands 17 assigned to the double brake stations 06 of the arc brake 05 are pneumatically controlled together, preferably by a rotational movement of the square shaft arranged across the width of the machine. The square shaft of the second square shaft drive 09 is also arranged parallel to the guide traverse 10 and is preferably in contact with surfaces of the output elements that receive the square shaft at each double brake station 06 of the arc brake 05.The surfaces of the output elements of the double brake stations 06 slide accordingly along the outer contour of the square shaft during its axial adjustment. The double brake station 06 is therefore axially displaceable, in particular slidable, along the square shafts and the guide traverse 10, for example as described above.

[0038] Each double brake station 06 of the arc brake 05 is assigned at least one pneumatic connection, in particular two suction air connections 11 which are connected to at least one, for example, adjustable or controllable vacuum generator. The pneumatic connection can be extended along the double brake station 06 or, as shown here with reference to the suction air connections 11, within the base body 07 of the double brake station 06.

[0039] Alternatively, the pneumatic connection can also be designed as a compressed air connection to generate a vacuum at the double brake station 06 according to the ejector principle. Further pneumatic connections, particularly those carrying suction air, can be assigned to the double brake station 06, which may also extend outside the base body 07 to the corresponding point of operation. Such connections can be used, for example, for cleaning with a blower.

[0040] The Fig. 4 Figure 1 shows a double brake station 06, particularly for the printing mode, equipped with two wide brake bands 17. The double brake station 06 has support bodies 15 on both sides of the base body 07 at the end downstream of the transport direction T. These support bodies are preferably arranged projecting laterally from the base body 07. The support bodies 15 are located on opposite sides of the base body 07 of the double brake station 06 and are preferably identical in construction but mirrored to each other. The support bodies 15 are, for example, integrally formed on each drive wheel, in particular a hedgehog wheel 28, which is rotatably mounted on the base body 07. The hedgehog wheels 28 engage the brake bands 17, preferably with pins, in their wide openings or suction ports. The rotational movement of both hedgehog wheels 28 is preferably transmitted to the brake bands 17 by force and / or form locking, so that these rotate endlessly.The hedgehog wheels 28 are driven here rotationally by the first square shaft drive 08, for example via the gear stage or a gearbox of the double brake station 06. The drive of the hedgehog wheels 28 is preferably dynamic and discontinuous, preferably cycle-dependent, between at least approximately machine speed and the preferably selectable depositing speed.

[0041] The support bodies 15 of the double brake station 06 each have an upper connection surface, which is arranged here at least approximately horizontally. The connection surfaces could also be inclined at least slightly to the horizontal. Here, each connection surface, arranged at least approximately horizontally, is assigned a suction strip 16 in an interchangeable manner. A support body 15 contains one or more pneumatic openings, for example two, in the upper connection surface as a pneumatic connection, which form a pneumatic flow connection with a corresponding opening on the underside of a suction strip 16. Furthermore, a plug connection, for example lockable, can be provided between the support body 15 and a suction strip 16. The suction strips 16 are designed here to receive one wide brake band 17 each, so that two wide brake bands 17 can be assigned to the double brake station 06 simultaneously.The suction strips 16 are preferably of identical construction and interchangeable with each other and can be assigned to the carrier bodies 15 of the double brake station 06 or the double brake stations 06.

[0042] The suction strips 16, which are interchangeably assigned to the double brake station 06, each also have a base surface arranged at least approximately horizontally, via which they are connected to the connecting surfaces of the support bodies 15 of the double brake station 06. For receiving and guiding a brake band 17, each suction strip 16 has a deflection area with deflection elements for the continuously guided brake band 17 at both its front end (viewed in the transport direction T) and its rear end. Between the two deflection areas, a suction area with at least one suction air opening is formed on the surface to be swept over by the brake band 17. Preferably, the suction strip 16 is designed with two side walls, between which a front deflection roller and a rear deflection roller are preferably mounted for rotational movement.A suction plate with a guide surface that is particularly flat or contoured throughout for the brake band 17 sliding over the suction plate is preferably provided between the front deflection roller and the rear deflection roller.

[0043] The suction plate preferably incorporates at least one suction air channel and / or at least one suction air bore, preferably a pre-suction bore, which are connected to a respective opening in the base surface of the suction strip 16 and which are swept over by the brake band 17. For example, the suction air bore is connected to a separate opening in the base surface of the suction strip 16, and a suction air channel downstream with respect to the transport direction T is connected to a further opening in the base surface of the suction strip 16. The suction air channel is preferably designed with an extension on the surface of the suction plate oriented in the transport direction T. The brake band 17 is held in contact with the suction plate between the front deflection roller and the rear deflection roller, so that the openings orThe suction openings of the brake band 17, in conjunction with the negative pressure present in the suction air duct and / or the suction air bore, create a suction effect on the undersides of the bows transported via the double brake station 06.

[0044] For the pneumatic supply of the support bodies 15 of the double brake station 06, the suction air connection 11 is preferably integrated into the base body 07, which extends to both support bodies 15. The suction air connection 11 is provided here for the simultaneous, preferably equal, supply of suction air to the suction strips 16 of the double brake station 06 assigned to the two connection surfaces of the support bodies 15. In particular, the suction areas of both suction strips 16 are thus supplied with suction air or negative pressure simultaneously and uniformly. Particularly preferably, the suction air of the double brake station 06 is pulsed by an air control element, in particular a rotary valve, which can be assigned to the double brake station 06. In particular, the rotary valve is actuated by the second square shaft drive 09. The rotary valve can have recesses for separately controlling the suction air of two pneumatic connections, each of a suction plate of a suction strip 16.Each carrier body 15 has a pneumatic connection, while other pneumatic connections, in particular the carrier body 15, may be permanently supplied with suction air.

[0045] Furthermore, the double brake station 06 is specifically assigned exactly one pneumatic catching element, in particular a pre-suction ring 27, which is arranged upstream of a connection surface of a carrier body 15 with respect to the transport direction T. The catching element, in particular the pre-suction ring 27, is thus aligned upstream of a suction strip 16 assigned to the connection surface. In particular, for the majority of double brake stations 06, it is provided that several double brake stations 06 with a pre-suction ring 27 in the transport direction T are configured on the left side of the respective base body 07 and several double brake stations 06 with a pre-suction ring 27 in the transport direction T are configured on the right side of the respective base body 07. Furthermore, height indexing of the catching element(s), in particular of the pre-suction ring(s) 27, is provided, for example by means of a cam disk actuated by the second square shaft drive 09.A pre-suction ring 27 can be arranged with a pre-suction ring 27 of another double braking station 06 for laterally stiffening the arcs 02 diverging from the transport direction T. The pneumatic catching element, in particular the pre-suction ring 27, can also be pneumatically supplied via the rotary valve of the double braking station 06, preferably from the further suction air connection 11.

[0046] The Fig. 5 The double brake station 06, for example, is shown equipped with two narrow brake bands 17 for the double-sided printing mode. Such an configuration is particularly suitable for fast double-sided printing or when processing glossy materials. To equip the double brake station 06, the old brake bands 17 and, in particular, the suction strips 16 for the old brake bands 17 are removed. The suction strips 16 for the narrow brake bands 17 can then be assigned to the connection surfaces of the support bodies 15. The suction strips 16 for the narrow brake bands 17 are narrower here perpendicular to the transport direction T than the suction strips 16 for the wide brake bands 17. Otherwise, the suction strips 16 for the narrow brake bands 17 preferably correspond to the suction strips 16 described above. The suction strips 16 for the narrow brake bands 17 are attached to the horizontally oriented surfaces of the support bodies 15 in a manner analogous to the suction strips 16 described above.The suction strips 16 are assigned to the horizontally inclined connection surfaces of the support bodies 15. The suction strips 16 can, for example, be attached. The narrow brake bands 17 are then placed around the suction strips 16. When assigning the suction strips 16 for the narrow brake bands 17 to the connection surfaces of the support bodies 15, one or more pneumatic connections to the support body 15 are established, so that the suction plate of the suction strip 16 for the narrow brake bands 17 is supplied with suction air. Preferably, all double brake stations 06 of the arc brake 05 can be equipped with suction strips 16 for brake bands 17 of different widths.

[0047] The Fig. 6 The double brake station 06, for example, is equipped with one wide and one narrow brake band 17 for the double-sided printing operating mode. In particular, each double brake station 06 of the arc brake 05 can accommodate wide brake bands 17, narrow brake bands 17, or one wide and one narrow brake band 17 simultaneously. The pins of the hedgehog wheels 28 are designed here to drive both the wide brake bands 17 and the narrow brake bands 17.

[0048] The Fig. 7Figure 1 shows a section of a perspective view of the sheet brake 05 with differently equipped double braking stations 06. Such equipment can be used, for example, to brake sheets 02 that are smaller, i.e., narrower, than the maximum sheet format that the machine can process. In this case, for example, a support body 15 and thus one or more pneumatic connections of this support body 15 may not be required, since it is located outside the current sheet format. The support body 15 is located, for example, between the format side edge 32 and a side plate 21 of the sheet brake 05.The unused pneumatic connection(s) of the support body 15 are closed by a pneumatically sealing cover element associated with the connection surface of the support body 15, for example a cover plate 31, or by a pneumatically sealing guide rail 29 associated with the connection surface of the support body 15 for a band, in particular a support band 30, and / or a pneumatically sealing support band 30. For example, all unused pneumatic connections of a support body 15 can be closed in this way.

[0049] The remaining narrow or wide brake bands 17 supporting carrier bodies 15 are each supplied with suction air permanently or intermittently via the suction air connections 11 of the respective double brake stations 06. Preferably, the unused pneumatic connection(s) of carrier bodies 15 are pneumatically sealed exclusively by a cover element, for example a cover plate 31, or a guide strip 29 and / or a support band 30. In particular, a cover element, especially a cover plate 31, or a guide strip 29 can have at least one rubber seal on the underside corresponding to the connection surface of a carrier body 15, which corresponds to the suction opening(s) of the connection surface of the carrier body 15 and seals them.

[0050] In particular, each suction strip 16 of the sheet brake 05 is interchangeable with a cover element, especially a cover plate 31. Preferably, the cover element is designed as a cover plate 31 having a friction-minimized and / or curved surface, which in particular has a vertical extent such that its surface, when attached to the connection surface of the support body 15, has a distance of at least 5 mm, preferably at least 10 mm, from the sheet transport plane. In particular, the cover plate 31 is held and thus fixed to the connection surface of a support body 15 exclusively by the suction air, which is applied, for example, temporarily and / or permanently. Depending on the requirements, a cover plate 31 can be assigned to a support body 15 of a double braking station 06 either inside or outside the sheet format.

[0051] In particular, each suction strip 16 of the sheet brake 05 or the cover element, especially the cover plate 31, is interchangeable with a guide strip 29. The guide strip 29 can, in principle, have the same structure as a suction strip 16 described above, wherein a guide strip 29 preferably does not have a suction plate with suction openings but rather a guide plate for guiding a circumferentially driven support belt 30. In particular, a support belt 30 has a closed outer circumferential surface and an inner circumferential surface adapted for the engagement of a hedgehog wheel 28, and especially a narrow sheet support surface. Depending on the requirements, a guide strip 29 with a support belt 30 can be assigned to a support body 15 of a double brake station 06, either within or outside the sheet format.Alternatively or additionally, in the case of a guide strip 29 having at least one suction opening, a pneumatic seal of the pneumatic connection(s) of the support body 15 can be achieved by a sealing guide of the support band 30 over the at least one suction opening of the guide strip 29. Alternatively, the guide strip 29 could also be designed as a modified suction strip 16, in particular one that seals only one pneumatic connection, for example for a narrow or wide brake band 17.

[0052] Operating principle: In the delivery unit 01 of the sheet-processing machine, the sheets 02 are transported by the gripper carriages 03 in the transport direction T over the axially adjusted double braking stations 06 of the sheet brake 05, slowed down by the brake, and, after release, placed on the delivery stack 04. The double braking stations 06 of the sheet brake 05 are axially adjusted according to the sheet format to be processed and carry either wide or narrow brake bands 17, support bands 30, or cover elements, in particular cover plates 31. Each double braking station 06 is assigned two of these elements.The axial adjustment of the double braking stations 06 for sheet braking particularly comprises the axial adjustment of one or two lateral double braking stations 06 such that one support body 15 of a double braking station 06 is within the sheet format and the other support body 15 of the same double braking station 06 is outside the sheet format, i.e., outside the sheet side edge 32. Preferably, the support bodies 15 located outside the sheet format are not equipped with suction strips 16 or brake bands 17.

[0053] In particular, at least one double brake station 06 arranged between the lateral double brake stations 06 is further equipped with a circumferentially driven narrow or wide brake band 17 and with a guide rail 29 with a support band 30 or with a cover element, in particular a cover plate 31. Preferably, at least one double brake station 06 arranged between the lateral double brake stations 06 is equipped with a narrow brake band 17 and a cover plate 31, wherein the surface of the cover plate 31 facing the arch 02 is designed to be spaced apart from the arch transport plane.The carrier body(s) 15 of double brake stations 06, which lie outside the arc format, are each equipped with the cover element, in particular the cover plate 31, which seals the pneumatic connections of the carrier body 15, or with the pneumatically sealing guide strip 29 for the support band 30 and / or a pneumatically sealing support band 30.

[0054] In particular, the control unit, especially the machine control unit preferably connected to a prepress stage, can determine and / or set a suitable position of the double braking stations 06 from predefined print image information, especially regarding the unprinted corridors of the sheets 02, taking into account the elements attributable to the double braking stations 06, especially the braking bands 17 of varying widths, the support bands 30, and the cover elements, especially the cover plates 31. After analyzing the print image information, the control unit can also visualize a proposal for the configuration of the individual double braking stations 06.

[0055] By using brake bands 17 of varying widths, guided around the perimeter, mounted on opposing, and in particular fixed, support bodies 15 of an axially displaceable double brake station 06 of the sheet brake 05 in the delivery 01 of the sheet-processing machine, the brake bands 17 are adapted to the surface area, in particular to printing and / or varnishing areas, especially on the reverse side, of the sheets 02 to be braked. For the reverse side printing, the sheet-processing machine, in particular the sheet-fed printing press, which includes the perfecting device, is operated in perfecting mode. Reference symbol list

[0056] 01 Delivery 02 Sheet 03 Gripper carriage 04 Delivery stack 05 Sheet brake 06 Double brake station 07 Base body 08 First square shaft drive 09 Second square shaft drive 10 Guide traverse 11 Suction air connection 12 Threaded spindle 13 Actuating element 14 Guide surface 15 Support body 16 Suction strip 17 Brake band, wide, narrow 18 Trailing edge traverse 19 Trailing edge stop 20 Additional traverse 21 Shield 22 Fixing plate 23 Spindle drives 24 Servo motor 25 Servo motor 26 Non-stop roller shutter 27 Pre-suction ring 28 Hedgehog wheel 29 Guide strip 30 Support band 31 Cover plate 32 Format side edge T Transport direction

Claims

1. Delivery for a sheet-processing machine comprising a sheet brake (05) having axially movable braking stations (06), with transport systems (03) for transporting sheets (02) of a sheet format (32) in the transport direction (T) via the sheet brake (05) to a delivery pile (04), wherein at least one braking station (06) has a plurality of carrier bodies (15) with connection surfaces, so that a plurality of elements (17, 30, 31) can be simultaneously assigned to the braking station (06) via the connection surfaces, and wherein each connection surface of the carrier bodies (15) has one or more pneumatic connections, characterized in that one or more non-required pneumatic connections of a carrier body (15) of the braking station (06) can be closed by a cover element (31), which is assigned to the connection surface in a pneumatically sealing manner, or by a guide element (29) for a belt (30, 17), which is assigned to the connection surface in a pneumatically sealing manner, and / or by a pneumatically sealing support belt (30).

2. Delivery according to claim 1, wherein the carrier bodies (15) are securely arranged on a main body (07) of the braking station (06) and each have one or more suction air-guiding pneumatic openings connected to a suction air connection (11) of the braking station (06), and wherein one or each pneumatic opening of a carrier body (15) can be closed or is closed solely by assigning the cover element (31) or the guide element (29) and / or the support belt (30).

3. Delivery according to claim 1 or 2, wherein the or each braking station (06) of the sheet brake (05) can be assigned wide braking belts (17) or narrow braking belts (17) or one wide and one narrow braking belt (17) simultaneously.

4. Delivery according to claim 1, 2 or 3, wherein the support belt (30) has a closed outer circumferential surface and an inner circumferential surface adapted for the engagement of a drive wheel (28), and in particular a narrow sheet support surface.

5. Delivery according to claim 1, 2, 3 or 4, wherein the cover element (31), in particular a cover plate (31), has on the underside that is to be assigned to the connection surface of the carrier body (15) at least one rubber seal which corresponds to one or more pneumatic openings of the connection surface and closes these in a sealing manner.

6. Delivery according to claim 1, 2, 3, 4 or 5, wherein the cover element (31) has such a vertical extent that its surface, in the state applied to the connection surface of the carrier body (15), is at a distance of at least 5 mm, in particular of 10 mm, from the sheet transport plane.

7. Delivery according to claim 1, 2, 3, 4, 5 or 6, wherein the cover element (31) can be fixed and / or is fixed on the connection surface of a carrier body (15) solely by applied suction air.

8. Delivery according to claim 1, 2, 3, 4, 5, 6 or 7, wherein suction strips (16) for braking belts (17) of different widths can be assigned to the carrier bodies (15) of the or all braking stations (06) via connection surfaces which are oriented horizontally or which are arranged in an inclined manner relative to the horizontal.

9. Delivery according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein each braking station (06) of the sheet brake (05) has two carrier bodies (15) arranged as a mirror image relative to each other, and each braking station (06) has exactly one height-adjustable catcher element (27) which is arranged upstream of a connection surface of a carrier body (15) with respect to the transport direction (T).

10. Method for depositing sheets (02) in a delivery (01) of a sheet-processing machine comprising a sheet brake (05) having axially movable braking stations (06), wherein the sheets (02) are transported by transport systems (03) in the transport direction (T) via the sheet brake (05) to a delivery pile (04), wherein the braking stations (06) are axially adjusted according to the sheet format (32), and wherein at least one braking station (06) has a plurality of carrier bodies (15) with connection surfaces, so that a plurality of elements (17, 30, 31) are simultaneously assigned to this braking station (06) via the connection surfaces, characterized in that one or two lateral braking stations (06) for sheet braking are axially adjusted in such a way that in each case one carrier body (15) is situated in the sheet format (32) and the other carrier body (15) of the same braking station (06) is situated outside of the sheet format (32).

11. Method according to claim 10, wherein at least one braking station (06) arranged between lateral braking stations (06) is equipped with a revolvably driven narrow or wide braking belt (17) and with a support belt (30) or a cover element (31).

12. Method according to claim 10 or 11, wherein at least one braking station (06) arranged between lateral braking stations (06) is equipped with a narrow braking belt (17) and with a cover element (31), wherein the surface of the cover element (31) that faces toward the sheets (02) is at a distance from the sheet transport plane.

13. Method according to claim 10, 11 or 12, wherein the carrier body or bodies (15) situated outside of the sheet format (32) are each equipped with a cover element (31), in particular a cover plate (31), which sealingly closes one or more pneumatic connections, or with a guide strip (29) for a belt (30, 17), which sealingly closes one or more pneumatic connections, and / or with a pneumatically sealing support belt (30).

14. Method according to claim 10, 11, 12 or 13, wherein a control device determines and / or sets a suitable position of the braking stations (06) on the basis of predefined print image information, in particular regarding print-free corridors of the sheets (02), taking into account the elements (17, 30, 31) that can be assigned to the braking stations (06), in particular braking belts (17) of different widths, support belts (30) and cover elements (31).

15. Use of revolvably driven braking belts (17) of different widths, in particular in a selected straight printing and perfecting mode, on mutually opposite carrier bodies (15) of an axially movable braking station (06) of a sheet brake (05) in the delivery (01) of a sheet-processing machine, which in particular has a turning device, in order to adapt the braking belts (17) to the configuration of sheets (02) to be braked.