EP4105157A1 - Apparatus and method for delivering sheets, and use of continuously guided braking belts of different widths - Google Patents

Abstract

The invention relates to a delivery for a sheet processing machine with a sheet brake (05) having axially adjustable braking stations (06), with transport systems (03) for transporting sheets (02) of a sheet format in the transport direction (T) via the sheet brake (05) to one Delivery stack (04), wherein at least one braking station (06) has a plurality of support bodies (15) with connection surfaces, so that the braking station (06) can be assigned a plurality of elements (17, 30, 31) at the same time via the connection surfaces, and wherein each connection surface of the support body ( 15) has one or more pneumatic connections, one or more pneumatic connections of a carrier body (15) of the braking station (06) that are not required being connected by a cover element (31) assigned to the connection surface in a pneumatically sealing manner or by a guide element (29) assigned to the connection surface in a pneumatically sealing manner closable for a band (30, 17) and/or a pneumatically sealing support band (30) s ind.

Description

The invention relates to a delivery for a sheet processing machine with a sheet brake that has axially adjustable braking stations, a method for depositing sheets in a delivery of a sheet processing machine with a sheet brake that has axially displaceable braking stations, and the use of revolving braking bands of different widths that are arranged opposite one another Carrier bodies of an axially displaceable braking station of a sheet brake.

From the DE 198 35 003 A1 a delivery for a printing press is known, wherein a suction belt of a sheet brake is replaced by a support belt, which is not penetrated by a negative pressure.

From the DE 101 40 825 A1 a method for setting guide elements for flat material based on print image information is known, with the job-specific optimal adjustment position for the positioning of sheet guiding and sheet conveying elements being determined using the job-specific print image information known from prepress.

From the DE 10 2006 035 693 A1 a sheet brake system for braking printed sheets is known, with two brake modules being coupled to a module carrier in one operating mode. Pneumatic connections that are not required are shut off separately using multi-port valves.

From the DE 10 2010 002 500 A1 a device for handling, namely for guiding and/or braking, sheets in a sheet processing machine is known, All the energy required to operate the device, in particular electrical energy and/or pneumatic energy, can be made available to the device via a basic module. A pneumatic opening of the basic module can be closed by an elaborately shaped and specially fixed adapter module, which does not require suction or blown air.

From the DE 10 2011 076 975 A1 discloses a sheet processing machine with a sheet brake and a method for operating it, with at least one detection means being provided with which the presence of a unit, the type of unit used and/or the arrangement of the unit relative to a station can be detected.

From the DE 10 2011 080 196 A1 a delivery of a sheet processing machine with a sheet brake is known, wherein sheet braking stations have guide units for bands. The guide units have adjustable strap guides, with a wide strap being able to be guided in one position of the strap guide and a narrower strap being able to be guided in another position.

From the DE 10 2012 206 927 A1 a delivery of a sheet processing machine and a method for depositing sheets is 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 clocked.

From the DE 10 2015 213 094 A1 discloses a braking station and a method for operating a braking station of a sheet brake in the delivery of a sheet-processing machine, the braking station containing a connection surface, the connection surface being able to be assigned interchangeable functional units, with at least a position securing element is provided for securing the position of a functional unit on the connection surface and wherein the position securing element has an air duct.

From the DE 10 2016 206 687 A1 discloses a braking station for a sheet brake in the delivery of a sheet-processing machine and a method for depositing sheets, a guide surface of a braking station for a revolving braking element having a first guide plane and at least one guide region spaced apart from the first guide plane. In a further development, the braking station can have carrier elements arranged in mirror image for the same or different functional units.

From the DE 10 2017 204 516 A1 a delivery of a sheet-processing machine with a sheet brake having braking stations and a method for depositing sheets is known, wherein a braking element or a sheet support element having a friction-minimised surface can be assigned interchangeably.

From the DE 10 2018 210 774 A1 discloses a delivery and a method for compensating for disruptive moments when operating a sheet brake in a delivery, wherein the sheet brake is assigned a compensation device for compensating for at least one disruptive moment when a sheet contact element is displaced.

The invention is based on the object of creating an alternative delivery for a sheet-processing machine or an alternative method for depositing sheets in the delivery of a sheet-processing machine. In particular, a significantly improved response to the printing materials to be processed and/or a significant increase in the performance of a sheet-processing machine, for example a sheet-fed printing press, should also be achieved.

The object is achieved according to the invention by the features of an independent claim.

The advantages that can be achieved with the invention are, in particular, that an alternative delivery for a sheet-processing machine or an alternative method for depositing sheets is created. In particular, the possibility is created to deal with the printing materials to be processed much better and/or to achieve a significant increase in the performance of a sheet-processing machine, for example a sheet-fed printing press. A corresponding sheet-processing machine, in particular a sheet-fed printing machine, with such a delivery is also provided.

In particular, an exchange of suction strips on the at least one braking station of the sheet brake should be made possible. Furthermore, it should preferably be ensured that different suction strips can be used, for example in such a way that it is possible to switch from a wide braking element to a braking element that is narrow in comparison, 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 use of a support belt and a suction belt on the braking station is preferably made possible. It should also be possible to use two support bands on the braking station.

Due to the flexibility of equipping the at least one or more or all braking stations, a significantly improved response to the printing material to be processed is made possible. In particular, when processing heavy materials, for example when varnishing in reverse printing, high processing speeds can be achieved through the use of wide suction belts. Narrow bands are particularly suitable for fast reprints and for the Processing shiny materials. The use of a narrow band and a support band is also possible.

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

Fig. 1

Auslage einer bogenverarbeitenden Maschine mit vor einem Auslagestapel angeordneter Bogenbremse und Nonstop-Einrichtung;

Fig. 2

Perspektivische Ansicht einer Bogenbremse mit axial verlagerbaren, an einer Führungstraverse geführten Doppel-Bremsstationen;

Fig. 3

Querschnitt einer an der Führungstraverse geführten Doppel-Bremsstation;

Fig. 4

Doppel-Bremsstation mit breiten Bremsbändern bestückt;

Fig. 5

Doppel-Bremsstation mit schmalen Bremsbändern bestückt;

Fig. 6

Doppel-Bremsstation mit einem breiten und einem schmalen Bremsband bestückt;

Fig. 7

Ausschnitt einer perspektivischen Ansicht der Bogenbremse mit verschiedenen den Doppel-Bremsstationen zugeordneten Elementen.

Show it:

1

Delivery of a sheet-processing machine with a sheet brake arranged in front of a delivery pile and a non-stop device;

2

Perspective view of a sheet brake with axially displaceable double braking stations guided on a guide traverse;

3

Cross-section of a double braking station guided on the guide traverse;

4

Double brake station equipped with wide brake bands;

figure 5

Double brake station equipped with narrow brake bands;

6

Double brake station equipped with a wide and a narrow brake band;

7

Section of a perspective view of the sheet brake with various elements assigned to the double braking stations.

the 1 shows, for example, a section of a delivery 01 of a sheet-processing machine, in particular a sheet-fed printing press, here specifically a sheet-fed offset rotary printing press, preferably in unit and in-line construction. The delivery 01 contains a transport system for transporting sheets 02, which transports the sheets 02 that have been printed, varnished, processed, etc. in the printing press to a delivery pile 04. This transport system is preferably embodied as a chain transport system with two delivery chains, each guided laterally on the frame of the delivery 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 path in the transport direction T to above the delivery pile 04, where the gripper carriages 03 release the sheets 02 for storage.

On the sheet transport path to the delivery pile 04, sheet guide plates are preferably arranged in the delivery 01 below the sheet transport plane, which guide the sheets 02 on the way to the delivery pile 04. The sheet guide plates have an at least approximately closed surface for guiding sheets 02 in a sliding and/or floating manner. Furthermore, nozzle openings for the pneumatic guidance of the sheets 02 can be assigned to the sheet guide plates. The printing machine is equipped in particular with a turning device and is preferably designed to be switchable between the modes of recto printing and recto and verso printing. An air cushion can be formed between a sheet guide plate and the sheets 02 being transported over it, particularly in the recto and verso printing mode. In particular, a non-stop device with an auxiliary pile carrier, for example a non-stop roller blind 26, which can be moved into the area of the delivery pile 04 in the transport direction T, is arranged in the delivery 01 for uninterrupted pile changes.

A sheet brake 05 is arranged upstream of the delivery pile 04 in the transport direction T in the delivery 01, which takes over the sheets 02 to be deposited from the gripper carriage 03 and decelerates them from machine speed to delivery speed after they have been released. After being decelerated by the sheet brake 05, the sheets 02 are aligned at the front, rear and/or side edge stops and neatly placed on the Discard pile 04 discarded. The delivery pile 04 is preferably lowered by a pile lift drive (not shown) during the sheet depositing process in such a way that the stack surface forms an at least approximately constant depositing level for the incoming sheets 02. The sheet brake 05 contains at least one and preferably at least two double braking stations 06, which are arranged such that they can be displaced, in particular displaced, axially, i.e. transversely to the transport direction T. In addition, one or more single braking stations or double braking stations 06, for example at least three or exactly three, four, five or more braking stations, depending on the format, can also be used.

In straight printing mode, the braking stations can be optimally arranged across the width of the machine, since they only come into contact with the unprinted sides of sheets 02. The braking stations can be shifted axially, particularly for the perfecting mode. The braking stations can be placed on a respective side sheet edge that is usually unprinted, on unprinted corridors and/or also on sufficiently dried color areas, for example in UV printing. The displacement can be carried out by hand or preferably by motor. For example, an actuator, in particular via spindles, relocate the braking stations. A separate drive can be assigned to one, several or all braking stations. Braking stations that are not required can be deactivated and/or moved out of the sheet format area.

the 2 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 precisely two braking bands 17, which are accommodated so as to run around at least two, preferably three, deflection rollers. Such a braking belt 17 preferably interacts pneumatically with the sheets 02 being transported via the sheet brake 05. In particular, the sheets 02 are brought into contact with a braking belt 17 by suction air and/or held in abutment so that contact occurs between the braking band 17 and the respective sheet 02. The braking belt 17 moves at least temporarily at a lower speed than the machine speed and correspondingly decelerates each sheet 02 released by the gripper carriage 03. For this purpose, at least one drive is assigned to the brake band 17, which drives or decelerates it at a constant or variable speed compared to the machine speed. However, the brake band 17 is preferably operated dynamically and/or periodically between at least approximately the machine speed and a placement speed that is lower than this. The drive can preferably drive or decelerate several or all brake bands 17 of the double braking stations 06. Alternatively, however, each double braking station 06 could also be assigned a separate drive.

The sheet brake 05 is, in particular, housed in a separate frame and is designed to be displaceable in and against the transport direction T for adjustment to different sheet formats. On the side facing the stacking area, a traverse is preferably arranged across the width of the machine, which is configured here as a trailing edge traverse 18 and is assigned to sheet brake 05. The trailing edge traverse 18 preferably carries a plurality of trailing edge stops 19 which are each mounted pivotably about a pivot axis oriented in the transport direction T. By shifting the sheet brake 05 in or counter to the transport direction T, the sheet brake 05 and the trailing edge stops 19 are adjusted here together to the current sheet format.

The trailing edge crossbar 18 and/or another crossbar 20 of the sheet brake 05 is preferably connected, in particular firmly, to the respective signs 21 arranged laterally in the area of the delivery frame. A guide traverse 10 for the double braking stations 06 can be connected to the plates 21 or carried by them in or outside the area of a maximum sheet format width. Preferably, the trailing edge traverse 18 and/or the further traverse 20 or, if necessary, connecting elements are routed beyond the signs 21 in such a way that they reach through the lateral display frame through openings in the frame wall. Particularly preferably, the trailing edge traverse 18 and/or the further traverse 20 or the connecting element is held outside of the display frame by a fixing plate 22, which is supported against the frame wall. The fixing plates 22, which are preferably arranged on both sides outside of the delivery frame, are held or mounted such that they can be displaced or slid in relation to the frame wall, in particular in and counter to the transport direction T. The fixing plates 22 can be mounted, for example, by means of strips.

The sheet brake 05 shown here contains, for example, five double braking stations 06, which can be shifted or shifted axially along the guide crossbeam 10, which is arranged transversely to the transport direction T, by an actuator. The guide traverse 10 is preferably arranged approximately in the middle of the double braking stations 06 as seen in the transport direction T and is connected in particular to the side plates 21 that can be displaced in or against the transport direction T for format setting. In particular, the guide traverse 10 is fixed to the frame but is arranged in a format-adjustable manner. The guide traverse 10 extends at least over the maximum sheet format to be processed and carries all the braking stations, in particular all double braking stations 06, of the sheet brake 05.

The actuator for the axial adjustment for the double braking stations 06 of the sheet brake 05 can, for example, have spindle drives 23 that are arranged outside of the shields 21 and can be controlled independently of one another, each of which is assigned to a double braking station 06. For example, the spindle drives 23 are arranged outside the display frame. The spindle drives 23 can preferably be attached, in particular screwed, outside the delivery frame to a fixing plate 22 arranged, for example, on the operating side of the machine. The sheet brake 05 has here also 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 pneumatic control of all brake bands 17.

A servo motor 24, for example, can be used to drive the square shaft of the first square shaft drive 08. The servomotor 24 can preferably be attached, in particular screwed, outside the frame to a fixing plate 22 arranged, for example, on the drive side of the machine. Furthermore, the drive can interact with a control device, for example the machine control, via which a desired placement speed and/or, if necessary, the course of movement of the brake bands 17 can be set and modified. The sheet brake 05 with the double braking stations 06 can thus be adapted to the different printing conditions. Alternatively, a separate drive can also be assigned to a respective double braking station 06 .

The square shaft of the second square shaft drive 09 can be driven at one speed by a servomotor 25, for example. The servomotor 25 can preferably be attached, in particular screwed, outside the frame to a fixing plate 22 arranged, for example, on the drive side of the machine. The drive movement of the servomotors 24, 25 is preferably adjustable and/or tunable to the sheet sequence. For example, a rotating rotary slide can be used to synchronously control one or more pneumatic connections, in particular the intake air supply, of the brake bands 17 of a double brake station 06 and in particular of all double brake stations 06 at the same time.

the 3 shows a cross section of a double braking station 06 of the sheet brake 05, the actuator for axial adjustment here in particular a threaded spindle 12 for each double braking station 06 contains, which can be driven by one of the spindle drives 23, for example via a cardan coupling. A respective double braking station 06 is connected to the respective threaded spindle 12 via an actuating element 13 assigned to it and is axially displaced by this actuating element 13 when the threaded spindle 12 rotates. In particular, each adjusting element 13 has exactly one connection point, in particular an engagement point, to a threaded spindle 12 . The threaded spindles 12 of the other double braking stations 06 are guided through bores without engaging with the actuating element 13 .

The double braking station 06 is preferably connected here to the associated actuating element 13 in such a way that it is guided by means of guide surfaces 14 of the actuating element 13 on the guide traverse 10, with the actuating element 13 carrying the double braking station 06. The double braking station 06 contains a base body 07 here, which is mounted on the guide traverse 10 arranged across the machine width, i.e. transversely to the transport direction T. The double braking station 06 is mounted such that it can be displaced or slid along the guide traverse 10, which is particularly profiled here. The guide traverse 10 is, for example, tubular in design around the actuator and could alternatively be in the form of a U-profile open at the bottom and at least partially enclose the actuator.

The base body 07 of the double braking station 06 is assigned a first output element, here a gearwheel of a gearwheel stage, which is operatively connected to the square shaft of the first square shaft drive 08 . A revolving drive of the brake bands 17 assigned to the base body 07 can take place via the first output element. All brake bands 17 assigned to the double brake stations 06 of the sheet brake 05 are preferably driven together by a rotary movement of the square shaft of the first square shaft drive 08, which is arranged across the width of the machine surfaces of the output elements receiving the square shaft at each double braking station 06 of the sheet brake 05. The surfaces of the output elements of the double braking stations 06 slide accordingly on the outer contour of the square shaft during its axial adjustment.

A second output element that is operatively connected to the square shaft of the second square shaft drive 09 is also assigned to the base body 07 . The second square shaft drive 09 can be used, for example, to provide clock-based pneumatic control for the brake bands 17 of the double brake station 06. For example, a rotary valve assigned to the double braking station 06 can be actuated via the second square shaft drive 09 for pneumatic control. All of the brake bands 17 assigned to the double brake stations 06 of the sheet brake 05 are preferably controlled pneumatically 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 the surfaces of the driven elements receiving the square shaft at each double braking station 06 of the sheet brake 05. The surfaces of the output elements of the double braking stations 06 slide accordingly on the outer contour of the square shaft during its axial adjustment. Accordingly, the double braking station 06 can be displaced axially along the square shafts and the guide traverse 10, in particular displaceable, for example as already described above.

At least one pneumatic connection is assigned to each double braking station 06 of the sheet brake 05, with two suction air connections 11 in particular being formed here, which are connected to at least one vacuum generator that can be set or controlled, for example. The pneumatic connection can be routed along the double braking station 06 or, as shown here using the suction air connections 11, within the base body 07 of the double braking station 06. Alternatively, the pneumatic connection can also be designed as a compressed air connection for generating a vacuum at the double brake station 06 according to the ejector principle. In a further development, further pneumatic connections, in particular those carrying suction air, can be assigned to the double braking station 06, which can also be routed outside of the base body 07 to the corresponding point of action. Such connections can be used for blow cleaning, for example.

the 4 shows a double brake station 06 equipped with two wide brake bands 17, in particular for the recto printing mode. The double braking station 06 has support bodies 15 on both sides at the downstream end of the base body 07 with respect to the transport direction T, which are preferably arranged protruding laterally on the base body 07 . The carrier bodies 15 are assigned to opposite sides of the base body 07 of the double braking station 06 and are preferably structurally identical but arranged as mirror images of one another. The carrier bodies 15 are formed, for example, on a drive wheel that is rotatably mounted on the base body 07, here in particular a spiked wheel 28. In order to drive the brake bands 17, the hedgehog wheels 28 here preferably engage with pins in their wide openings or suction openings. The rotational movement of both hedgehog wheels 28 is preferably transmitted to the brake bands 17 in a non-positive and/or positive manner, so that these rotate endlessly. Here, the hedgehog wheels 28 are driven in rotation by the first square shaft drive 08 , for example via the gear stage or a gearbox of the double braking station 06 . The drive of the hedgehog wheels 28 preferably takes place dynamically and discontinuously, preferably clock-bound, between at least approximately the machine speed and the preferably selectable delivery speed.

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

The suction strips 16 assigned to the double braking station 06 so that they can be exchanged each also have an at least approximately horizontally arranged base area, via which they are connected to the connection surfaces of the carrier bodies 15 of the double braking station 06. A suction bar 16 has a deflection area with deflection elements for the circumferentially guidable brake belt 17 at the front end and at the rear end, viewed in the transport direction T, for receiving and guiding a brake belt 17 . A suction area with at least one suction air opening is formed between the two deflection areas on the surface to be swept over by the brake band 17 . The squeegee 16 is preferably designed here with two side walls, between which a front deflection roller and a rear deflection roller are accommodated, preferably in a rotationally movable manner. A suction plate is preferably provided here between the front deflection roller and the rear deflection roller, with an in particular continuously flat or contoured guide surface for the brake band 17 sliding over the suction plate.

In the suction plate is preferably at least one suction air duct and / or at least one suction air hole, preferably a pre-suction hole introduced, which with or one respective opening of the base of the squeegee 16 are connected and which are swept by the brake band 17. For example, the suction air hole is flow-connected to a separate opening in the base of the squeegee 16 and a downstream suction air channel with respect to the transport direction T is connected to the further opening in the base of the squeegee 16 . The suction air channel is preferably formed with an extension oriented in the transport direction T on the surface of the suction plate. 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 or suction openings in the brake band 17, in conjunction with the negative pressure present in the suction air duct and/or the suction air bore, have a suction effect on the via the double Form braking station 06 transported sheet undersides.

For the pneumatic supply of the carrier body 15 of the double braking station 06, the suction air connection 11 is preferably incorporated into the base body 07, which leads to both carrier bodies 15. The suction air connection 11 is provided here for the simultaneous, preferably half, suction air supply to the suction strips 16 of the double braking station 06, which suction strips are assigned to the two connection surfaces of the carrier bodies 15. In particular, the suction areas of both suction strips 16 are thus supplied simultaneously and evenly with suction air or negative pressure. The suction air of double braking station 06 is particularly preferably clocked by an air control element, in particular a rotary slide valve, which can be assigned to double braking station 06. In particular, the rotary slide is actuated by the second square shaft drive 09. The rotary slide can have recesses for separately controlling the suction air of two pneumatic connections, each of a suction plate of a suction strip 16 or a pneumatic connection of the carrier body 15, while other pneumatic connections, in particular the carrier body 15, can be permanently subjected to suction air, for example.

Furthermore, the double braking station 06 is in particular precisely a pneumatic one Catcher 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 catcher element, in particular the pre-suction ring 27, is thus aligned in front of a suction strip 16 associated with the connection surface. In particular, in the case of the plurality of double braking stations 06, it is provided that several double braking stations 06 with a pre-suction ring 27 be formed on the left-hand side of the respective base body 07 in the transport direction T and several double braking stations 06 with a pre-suction ring 27 on the right-hand side of the respective base body 07 in the transport direction T. Height timing of the catcher element or elements, in particular the or all pre-suction rings 27, is provided, for example via a cam disk actuated by the second square shaft drive 09. A pre-suction ring 27 can also be arranged with a pre-suction ring 27 of a further double braking station 06 for transverse tightening of the sheets 02, diverging from the transport direction T. The pneumatic catcher element, in particular the pre-suction ring 27, can also be supplied pneumatically via the rotary valve of the double braking station 06, preferably from the additional suction air connection 11.

the figure 5 shows the double braking station 06, for example, equipped with two narrow braking bands 17 for the perfecting printing mode. Such an assembly is particularly suitable for fast reprinting or when processing glossy materials. The old brake bands 17 and in particular the suction strips 16 for the old brake bands 17 are removed for equipping the double brake station 06. Then the suction strips 16 for the narrow brake bands 17 can be assigned to the connection surfaces of the carrier body 15 . The suction strips 16 for the narrow braking bands 17 are designed to be narrower here transversely to the transport direction T than the suction strips 16 for the wide braking bands 17. Otherwise, the suction strips 16 for the narrow braking strips 17 preferably correspond to the suction strips 16 described. The suction strips 16 for the narrow braking strips 17 are analogous to the above-described squeegee 16 the horizontally aligned or arranged inclined to the horizontal connection surfaces of the Carrier body 15 assigned. The suction strips 16 can be attached, for example. The narrow brake bands 17 are placed around the suction strips 16 accordingly. When the suction strips 16 for the narrow brake bands 17 are assigned to the connection surfaces of the carrier body 15, one or more pneumatic connections are made to the carrier body 15 in a similar manner, so that the suction plate of the suction strip 16 for the narrow brake bands 17 is also supplied with suction air. All double braking stations 06 of the sheet brake 05 can preferably be equipped with suction strips 16 for braking belts 17 of different widths.

the 6 shows the double brake station 06 equipped with a wide and a narrow brake band 17 for the perfecting printing mode, for example. In particular, each double braking station 06 of the sheet brake 05 can accommodate wide braking bands 17 or narrow braking bands 17 or a wide and a narrow braking band 17 at the same time. The pins of the hedgehog wheels 28 are designed both to drive the wide brake bands 17 and to drive the narrow brake bands 17 here.

the 7 shows a detail 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, ie narrower, than the maximum sheet format that can be processed by the machine. In this case, for example, a carrier body 15 and thus one or more pneumatic connections of this carrier body 15 are not required, since this is outside the current sheet format. The carrier body 15 stands, for example, between the format side edge 32 and a side shield 21 of the sheet brake 05. The pneumatic connection(s) of the carrier body 15 that is/are not required are connected by a cover element assigned to the connection surface of the carrier body 15 in a pneumatically sealing manner, for example a cover plate 31, or by a pneumatically sealing the connection surface of the carrier body 15 associated guide bar 29 for a band, in particular a support band 30, and/or a pneumatically sealing support band 30 is closed. For example, all the pneumatic connections of a carrier body 15 that are not required can be closed in this way.

The remaining carrier bodies 15 carrying narrow or wide brake bands 17 are each supplied with suction air continuously or also in cycles via the suction air connections 11 of the respective double braking stations 06 . The pneumatic connection(s) of carrier bodies 15 that is/are not required is preferably closed in a pneumatically sealing manner exclusively by a cover element, for example a cover plate 31, or a guide strip 29 and/or a support belt 30. In particular, a cover element, in particular a cover plate 31, or a guide strip 29 can have at least one rubber seal on the underside to be assigned to the connection surface of a carrier body 15, which corresponds to the suction opening or openings of the connection surface of the carrier body 15 and seals it off.

In particular, each suction bar 16 of sheet brake 05 can be exchanged for a cover element, in particular a cover plate 31. The cover element is preferably embodied as a cover plate 31 that has a friction-minimized and/or curved surface and, in particular, has such a vertical extension that its surface is at a distance from the sheet transport plane of at least 5 mm, preferably at least 10 mm, when it is attached to the connection surface of the carrier body 15 . In particular, the cover plate 31 is held on the connection surface of a carrier body 15 and thus fixed solely by the suction air that is temporarily and/or permanently present, for example. A cover plate 31 can be assigned to a carrier body 15 of a double braking station 06, depending on the requirement, inside or outside the sheet format.

In particular, each suction bar 16 of the sheet brake 05 or the cover element, in particular the cover plate 31, is positioned against a guide bar 29 interchangeable. In principle, the guide bar 29 can have the same structure as a suction bar 16 described above, with a guide bar 29 preferably not having a suction plate having suction openings but a guide plate for guiding a supporting belt 30 that is driven in rotation. In particular, a support belt 30 has a closed outer peripheral surface and an inner peripheral surface adapted for the engagement of a hedgehog wheel 28 and in particular a narrow arch support surface. A guide bar 29 with a support belt 30 can be assigned to a carrier body 15 of a double braking station 06, inside or outside the sheet format, depending on the requirement. Alternatively or additionally, in the case of a guide rail 29 having at least one suction opening, the pneumatic connection(s) of the carrier body 15 can be pneumatically sealed by guiding the support belt 30 in a sealing manner over the at least one suction opening of the guide rail 29 . Alternatively, the guide strip 29 could also be designed as a modified suction strip 16 sealingly closing only one pneumatic connection, for example for a narrow or wide brake band 17 .

How it works: In the delivery 01 of the sheet processing machine, the sheets 02 are transported by the gripper carriages 03 in the transport direction T via the axially adjusted double braking stations 06 of the sheet brake 05, decelerated by the latter and deposited on the delivery pile 04 after they have been released. The double braking stations 06 of the sheet brake 05 are adjusted axially according to the sheet format to be processed and carry either wide or narrow braking belts 17 or support belts 30 or cover elements, in particular cover plates 31. Each double braking station 06 is assigned two of these elements in particular. The axial adjustment of the double braking stations 06 for sheet braking includes, in particular, the axial adjustment of a lateral double braking station 06 or two lateral double braking stations 06 in such a way that one carrier body 15 of a double braking station 06 in sheet format and the other carrier body 15 of the same double -Brake station 06 outside of Sheet format ie outside the format side edge 32 is located. The carrier bodies 15 standing outside the sheet format are preferably not equipped with suction strips 16 or braking belts 17 .

In particular, at least one double braking station 06 arranged between the lateral double braking stations 06 is also equipped with a narrow or wide braking band 17 driven in rotation and with a guide strip 29 with a support band 30 or with a cover element, in particular a cover plate 31. At least one double braking station 06 located between the lateral double braking stations 06 is preferably equipped with a narrow braking belt 17 and a cover plate 31, with the surface of the cover plate 31 facing the sheets 02 being spaced apart from the sheet transport plane. The carrier body(s) 15 of double braking stations 06 located outside the sheet format are each connected to the cover element sealingly closing the pneumatic connection(s) of the carrier body 15, in particular the cover plate 31, or to the pneumatically sealing guide strip 29 for the support belt 30 and/or a pneumatically sealing support band 30 equipped.

In particular, the control device, in particular the machine controller, which is preferably connected to a preliminary stage, can determine a suitable position for the double braking stations 06 from specified printed image information, in particular regarding unprinted corridors of the sheets 02, taking into account the elements that can be assigned to the double braking stations 06, in particular the different widths of the braking bands 17, the support strips 30 and the cover elements, in particular the cover plates 31, determine and/or adjust. After analyzing the printed image information, the control device can also visualize a suggestion for equipping the individual double braking stations 06 .

By using the differently wide, circumferentially guided brake bands 17 on carrier bodies 15, which are in particular fixed opposite one another, of an axially displaceable double braking station 06 of the sheet brake 05 in the delivery 01 of the sheet processing machine, the braking belts 17 are adapted to the occupancy, in particular at printing and/or varnishing points, especially on the back side of the sheet to be braked Arc 02 scored. For perfecting, the sheet-processing machine having the turning device, in particular the sheet-fed printing press, is operated in the perfecting mode.

Reference List

01

display

02

arc

03

gripper carriage

04

display pile

05

sheet brake

06

Double brake station

07

body

08

first square shaft drive

09

second square shaft drive

10

guide traverse

11

suction air connection

12

lead screw

13

actuator

14

guide surface

15

carrier body

16

squeegee

17

Brake band, wide, narrow

18

trailing edge traverse

19

trailing edge stop

20

further traverse

21

Sign

22

fixing plate

23

spindle drives

24

servo motor

25

servo motor

26

non-stop roller blind

27

pre-suction ring

28

hedgehog wheel

29

guide bar

30

support band

31

cover plate

32

format side edge

T

transport direction

Claims (15)

Delivery for a sheet processing machine with a sheet brake (05) having axially adjustable 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 support bodies (15) with connection surfaces, so that the braking station (06) can be assigned a plurality of elements (17, 30, 31) at the same time via the connection surfaces, and wherein each connection surface of the support body (15 ) has one or more pneumatic connections, characterized in that one or more pneumatic connections of a carrier body (15) of the braking station (06) that are not required are covered by a cover element (31) assigned to the connection surface in a pneumatically sealing manner or by a guide element (31) assigned to the connection surface in a pneumatically sealing manner 29) closable for a band (30, 17) and/or a pneumatically sealing support band (30) s ind. Display according to Claim 1, wherein the carrier bodies (15) are arranged fixedly on a base body (07) of the braking station (06) and each have one or more pneumatic openings which carry suction air and are 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 closed exclusively by assignment of the cover element (31) or the guide element (29) and/or the support belt (30). Delivery according to claim 1 or 2, wherein wide braking bands (17) or narrow braking bands (17) or a wide and a narrow braking band (17) can be assigned simultaneously to the or each braking station (06) of the sheet brake (05). A display according to claim 1, 2 or 3, wherein the support belt (30) has a closed outer peripheral surface and an inner peripheral surface adapted for engagement of a drive wheel (28), and in particular a narrow sheet support surface. Display according to Claim 1, 2, 3 or 4, wherein the cover element (31), in particular a cover plate (31), has at least one rubber seal on the underside to be assigned to the connection surface of the carrier body (15), which is connected to one or more pneumatic openings in the connection surface corresponds and seals it off. 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 attached to the connection surface of the carrier body (15) is at a distance from the sheet transport plane of at least 5 mm, in particular 10 mm. Display according to Claim 1, 2, 3, 4, 5 or 6, in which the cover element (31) can be and/or is fixed exclusively by the applied suction air on the connection surface of a carrier body (15). Display according to Claim 1, 2, 3, 4, 5, 6 or 7, wherein the support bodies (15) of the or all braking stations (06) have suction strips (16) for braking bands (17) of different widths via horizontally aligned connection surfaces or arranged inclined to the horizontal are assignable. Delivery according to Claim 1, 2, 3, 4, 5, 6, 7 or 8, in which each braking station (06) of the sheet brake (05) has two support bodies (15) which are arranged as mirror images of one another and each braking station (06) has exactly one height-adjustable catcher element ( 27) which has a connection surface with respect to the transport direction (T). a carrier body (15) is arranged upstream. Method for depositing sheets (02) in a delivery (01) of a sheet-processing machine with a sheet brake (05) having axially displaceable braking stations (06), the sheets (02) being transported from transport systems (03) in the transport direction (T) via the sheet brake (05) are transported to a delivery pile (04), with the braking stations (06) being adjusted axially in accordance with the sheet format (32) and with at least one braking station (06) having a plurality of carrier bodies (15) with connection surfaces, so that this braking station (06 ) several elements (17, 30, 31) are assigned at the same time via the connection surfaces, characterized in that one or two lateral braking stations (06) for sheet braking are set axially in such a way that one carrier body (15) in sheet format (32) and the other carrier body (15) of the same braking station (06) is outside the sheet format (32). Method according to Claim 10, in which at least one braking station (06) arranged between lateral braking stations (06) is equipped with a revolving, narrow or wide braking band (17) and a supporting band (30) or a cover element (31). The 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 band (17) and a cover element (31), the surface of the cover element (31 ) is formed at a distance from the sheet transport plane. The method of claim 10, 11 or 12, wherein the one or more outside of the sheet format (32) lying carrier body (15) each with a one or a cover element (31) sealingly closing several pneumatic connections, in particular a cover plate (31), or with a guide strip (29) for a belt (30, 17) sealingly closing one or more pneumatic connections and/or with a pneumatically sealing support belt (30) are equipped. The method according to claim 10, 11, 12 or 13, wherein a control device calculates a suitable position of the braking stations (06) from specified printed image information, in particular regarding unprinted corridors of the sheets (02), taking into account the elements (17, 30 , 31), in particular brake bands (17), support bands (30) and cover elements (31) of different widths, are determined and/or adjusted. Use of circumferentially guided braking bands (17) of different widths, in particular in a selected perfecting printing mode, on carrier bodies (15) arranged opposite one another of an axially displaceable braking station (06) of a sheet brake (05) in the delivery (01) of, in particular, a turning device having sheet processing machine for adapting the brake bands (17) to the occupancy of sheets to be braked (02).

Images