Sheet deliverer for a sheet-processing machine, having a stack support which is vertically movable by means of a stack-lifting drive

Abstract

The invention relates to a sheet deliverer (01) for a sheet-processing machine, having a stack support (04) which is vertically movable by means of a stack-lifting drive, and having transport systems (02) for transporting sheets (33) in a transport direction (T) to a stacking region and for releasing the sheets (33) in the stacking region above the stack support (04), wherein: at least one lateral-edge stop (20) having at least one stop element (35) is provided for aligning the dropping sheets (33) in the stacking region; the stop element (35) has at least one stop face (36) and at least one slide (23); a first drive is assigned to the stop face (36) and causes a lifting or pivoting movement of the stop face (36) in order to laterally align the sheets (33), which movement has a movement component which is directed transversely to the transport direction (T), and a second drive is assigned to the at least one slide (23), which second drive is independent of the first drive, and causes a lifting or pivoting movement of the slide (23) in order to laterally align the sheets (33), which movement has a movement component which is directed transversely to the transport direction (T). The invention also relates to a sheet-processing machine comprising a sheet deliverer (01).

Description

[0001] Description

[0002] Delivery for a sheet-processing machine with a stack carrier that can be moved vertically by a stack lifting drive

[0003] The invention relates to a delivery for a sheet processing machine with a stack carrier that can be moved vertically by a stack lifting drive.

[0004] The printed sheets are deposited in a delivery area of ​​a printing press. The final alignment of the sheets is usually carried out laterally by the side joggers arranged on the sides, and in the sheet travel direction by front stops and stops on the suction roller. This results in the falling sheets being deposited very precisely on top of one another. The result is a delivery pile in which the paper edges lie on top of one another in the lateral direction and in the sheet travel direction with little or no offset. To align the sheets, the familiar side joggers perform linear lifting or tilting movements on one or both sides, which align the sheets laterally in an alignment tray set to the format.

[0005] If the sheets processed in the printing press exhibit a large fluctuation in their dimensions and, in particular, the tolerance of the format width of the processed sheets is comparatively large, problems arise with the alignment of the sheets. Conventional side joggers can only precisely align sheets that have the ideal format width. If the dimensions of the format width fluctuate too much, smaller sheets cannot be aligned because the alignment shaft, which is formed by opposing side joggers, cannot be made narrower because it is limited by the maximum format width. Smaller sheets lie undefined in the stack. This can lead to problems or a loss of quality during further processing, for example stripping in a stripping unit of a die cutter.From DE 102017221 434 A1 a delivery and a method for depositing sheets in a stacking area formed by stops in a delivery are known, wherein the stops have stop surfaces for falling sheets, wherein the stop surfaces have air-permeable areas and airtight areas, wherein these areas are formed one after the other in the direction of sheet fall and wherein air-permeable and / or airtight areas are arranged in at least approximately the same horizontal position on at least two abutting stack side surfaces.

[0006] From DE 102019 125 807 B3 a delivery with a stack carrying device for receiving a stack of sheets is known, wherein a stack lifting drive acts on traction means for displacing a stack carrier and wherein a further drive is designed which acts on the traction means for horizontally displacing the stack carrier.

[0007] DE 101 460 72 A1 describes a straight-line jogger for sheets deposited onto a stack at a set delivery rate, as well as a delivery unit of a sheet-processing machine equipped with the device. The straight-line jogger comprises a rotating body that rotates during operation and generates a joggling motion.

[0008] DE 102022 118 978 A1 discloses a delivery for a sheet-processing machine with a stack support that can be vertically displaced by a stack lifting drive, and with transport systems for transporting sheets in a transport direction to a stacking area and for releasing the sheets in the stacking area above the stack support, with at least one side edge stop. The side edge stop has two liftable, suspended stop elements that are vertically displaced by actuators.

[0009] DE 30 01 356 A1 describes a device for the lateral alignment of sheets in sheet delivery devices of sheet processing machines, consisting of a straight pusher with a spring-loaded oscillating plate that can be tilted by means of a drive and one or more fixed stops.

[0010] The invention is based on the object of creating an alternative delivery for a sheet processing machine with a stack carrier that can be moved vertically by a stack lifting drive.

[0011] In particular, the stacking process of sheets with high cutting tolerances or format variations on sheet-processing machines is to be further improved.

[0012] The object is achieved according to the invention by the features of claim 1 and claim 15.

[0013] The advantages achievable with the invention consist, in particular, in the creation of an alternative delivery system. In particular, the stacking process on sheet-processing machines is further improved. A corresponding sheet-processing machine, in particular a printing press, with such a delivery system is also provided.

[0014] In particular, this allows for flexible processing of sheets with different cutting tolerance classes. The effort required to adjust the delivery and, in particular, the distances between the side edge stops is reduced, and process reliability is increased while maintaining a previously configured setting.

[0015] An embodiment of the invention is illustrated in the drawings and is described in more detail below.

[0016] Shown are: Fig. 1 a delivery of a sheet processing machine with a non-stop device;

[0017] Fig. 2 is a view of a stacking area with a side edge stop and another side edge stop in the transport direction;

[0018] Fig. 3 is an enlarged perspective view of the side edge stop as viewed from the stacking area;

[0019] Fig. 4 a slider of the side edge stop viewed from the stacking area.

[0020] Fig. 1 shows, for example, the stacking area of ​​a delivery 01 of a sheet-processing machine, for example a sheet-fed printing press, in particular a sheet-fed offset rotary printing press, preferably in aggregate and series design, in which the processed, for example printed and / or varnished, sheets 33 are deposited.

[0021] The invention is not limited to delivery units 01 of sheet-processing machines designed as printing machines, but can be used on all types of sheet-processing machines or be a component thereof.

[0022] In a preferred embodiment, the sheet-processing machine can be designed as a machine that mechanically processes sheets 33, e.g., embossing, cutting, or especially punching, with one or more units that mechanically process the sheets 33, e.g., with at least one punching or embossing unit or a stripping unit. In an advantageous further development of the machine, it can also be designed in the manner of a hybrid machine, as a machine that mechanically processes sheets 33, with at least one punching or embossing unit and, in addition, at least one printing unit arranged upstream of the punching or embossing unit in the substrate or transport path.

[0023] For transporting the sheets 33 from a last processing station, in particular a last printing or coating unit, of the machine, preferably circulating transport systems 02 are used, for example gripper carriages 02 carrying clamping grippers, from which the sheets 33 are transported in the transport direction T along a transport path to the stacking area, fixed at their front edges. For sheet transport, further preferred chain transport systems are designed with two delivery chains, each guided laterally on the frame of the delivery 01, between which the gripper carriages 02 are arranged. The gripper carriages 02 are guided by the delivery chains, in particular continuously on a gripper carriage track in the transport direction T to the stacking area or over a delivery pile 03, where the gripper carriages 02 release the sheets 33 for deposit.

[0024] In the delivery 01, sheet guide plates (not shown) can be arranged below the transport path, which guide the sheets 33 on their way to the delivery pile 03. Such sheet guide plates preferably have at least approximately closed surfaces for the sliding and / or floating guidance of the sheets 33. Nozzle openings, in particular Venturi nozzles, for pneumatically guiding the sheets 33 can preferably be assigned to the sheet guide plates. The machine can also have a turning device and can preferably be designed to be switchable between the straight-printing and front-to-back printing modes. An air cushion can be formed between the sheet guide plates and the sheets 33 transported above them, in particular in the front-to-back printing mode.

[0025] In the stacking area of ​​the delivery 01, a stack support plate 04 which can be vertically displaced by a stack lifting device (not shown) is provided as a stack carrier 04 and can carry, for example, a pallet 05 for receiving the sheets 33 to be delivered. Above or in the stacking area, in particular above the stack support plate 04, the grippers of the gripper carriages 02 open and release the sheets 33 so that they sink under the effect of gravity, for example onto the pallet 05 arranged on the stack support plate 04. Blowing means, for example a blowing frame, preferably with axial fans, can be arranged above the delivery pile 03, which assist the depositing movement of the sheets 33 released by the gripper carriages 02.

[0026] In the delivery 01, a sheet brake 06 is preferably arranged upstream of the delivery stack 03 with respect to the transport direction T. This sheet brake takes over the sheets 33 to be deposited from the gripper carriages 02 and, after their release, decelerates them from machine speed to delivery speed. A sheet brake 06 can, for example, have pneumatically acting rotating and / or rotating brake elements acting on the underside of the sheet. The slowed-down sheets 33 then rest against stop surfaces, in particular of leading edge stops 07, preferably under the action of blast air, and sink onto the pallet 05 or the surface of the delivery stack 03. The falling sheets 33 are preferably guided by stop surfaces on the leading edge, in particular the leading edge stops 07, on the side edges and / or the trailing edge. In this way, the delivery stack 03 is formed on the pallet 05 from sheets 33 deposited one on top of the other.

[0027] As the delivery stack 03 on the pallet 05 increases, the stack support plate 04 is lowered by the stack lifting drive so that each sheet 33 to be deposited travels approximately the same drop distance to the surface of the delivery stack 03. A sensor, preferably detecting the top edge of the delivery stack 03 and connected to a common control device, can be arranged to control or regulate the lowering movement of the stack support plate 04. Once the delivery stack 03 has reached a certain or maximum height, the delivery stack 03 can be delivered without interruption, for example, using a non-stop device 08. The delivery 01 can also be equipped with a logistics system for the preferably automated transport of full and / or empty pallets 05 or can also be designed as a double-stack or multiple-stack delivery.

[0028] For uninterrupted stack changes or stack removal, the non-stop device 08 in the delivery 01 preferably has an auxiliary stack support, in particular a non-stop roller blind 09, which can be moved by a non-stop drive. This non-stop roller blind 09 can be pushed or retracted into the stacking area or the sheet drop area above the delivery stack 03 and can be pulled or retracted from the stacking area counter to the insertion direction. In particular, the non-stop roller blind 09 can be moved into the stacking area in the transport direction T to support the sheets 33 falling during a stack change, wherein the sheets 33 picked up by the non-stop roller blind 09 form an auxiliary stack. The non-stop roller blind 09 is preferably arranged directly below the sheet brake 06 and in particular has a separate auxiliary stack lifting device (not shown) for vertical displacement.

[0029] The stack lifting drive effects a vertical displacement of the stack support plate 04, preferably via a traction mechanism. In particular, the stack lifting drive here comprises a shaft which is rotatably driven or driven by a drive, for example an electric motor, and which is arranged coaxially and spaced apart from one another and carries chain wheels or drive pinions. Rear lifting chains are placed around the laterally arranged drive pinions, and front lifting chains are guided by further guide pinions and are preferably fastened to the stack support plate 04 in the area of ​​the corners. When the drive, in particular the electric motor, causes the shaft to rotate, the stack support plate 04 can be displaced vertically via the lifting chains. The stack support plate 04 can be raised or lowered vertically by the lifting chains depending on the control of the drive, for example an electric motor, which is connected to the control device, preferably the machine control system.The four lifting chains are moved synchronously.

[0030] Sheets 33 of various formats can be processed by the delivery 01 or the machine, so that delivery stacks 03 of different sizes can be formed. For example, such delivery stacks 03 can be picked up as an auxiliary stack by the auxiliary stack carrier (not shown), in particular the non-stop roller blind 09, of the non-stop device 08 of the delivery 01 during a vertical displacement of the stack support plate 04. In particular, such an auxiliary stack can continue to grow during a non-stop stack change, wherein the auxiliary stack carrier, in particular the non-stop roller blind 09, is lowered by the auxiliary stack lifting device. This enables uninterrupted processing of the sheets 33 in the machine.

[0031] The stack support plate 04 is preferably guided for vertical displacement by at least one vertically arranged guide element, wherein the guide element is preferably designed as a guide rail. In particular, the stack support plate 04 is vertically guided by two spaced-apart vertical guide rails, which are preferably arranged fixed to the frame on one side of the delivery stack 03, preferably below the sheet brake 06.

[0032] The stack support plate 04 is preferably also displaceable or slidable horizontally relative to the at least one guide element, here the two guide rails, in particular by means of a guide means that is preferably displaceable relative to the stack support plate 04. The stack support plate 04 is preferably mounted or accommodated so that it can be displaced horizontally transversely to the transport direction T. At least one side edge stop 20 is arranged in the delivery 01 for aligning the falling sheets 33 forming a delivery stack 03.

[0033] Preferably, a further side edge stop 37 is arranged on the side of the stacking area opposite the side edge stop 20. The further side edge stop 37 can, in particular, have a structure that differs from that of the side edge stop 20.

[0034] The forming delivery stack 03 in the delivery 01 is guided not only by the side edge stops 20; 37 but also, in particular, by the leading edge stops 07 and trailing edge stops on the sheet brake 06, which thus form an alignment or storage chute for the falling sheets 33. To adjust to the format of the sheets 33 to be deposited, the trailing edge stops are preferably adjusted together with the sheet brake 06 in or against the transport direction T, and the side edge stop 20 and / or the further side edge stop 37 are adjusted transversely to the transport direction T.

[0035] The side edge stop 20 comprises at least one stop element 35 for aligning the falling sheets 33 in the stacking area. The stop element 35 has a stop surface 36 and at least one slider 23. The stop surface 36 can be formed by a guide plate or several interconnected guide plates. The stop surface 36 is arranged entirely or partially above a stack surface being formed.

[0036] The stop surface 36 is at least partially oriented vertically or inclined at an angle of less than ten degrees to the vertical. In particular, an upper section of the stop surface 36 can be inclined at an angle of less than ten degrees, preferably between one and nine degrees, to the vertical, and a lower section can be oriented vertically. A first drive is assigned to the stop surface 36, in particular the guide plate, which causes a lifting or pivoting movement of the stop surface 36 with a movement component directed transversely to the transport direction T.

[0037] Preferably, the stop surface 36 is formed with at least one recess or slot for the slide 23. The slide 23 can be arranged so as to pass through the recess or slot. Alternatively, the slide 23 can also be arranged laterally next to the stop surface 36 or between two stop surfaces 36.

[0038] Preferably, two sliders 23 are formed, which are arranged at a distance from one another as viewed in the transport direction T. The arrangement of two or more sliders 23 has the advantage that the sheets 33 can be moved without jamming.

[0039] In the following, the display 01 is described using the example of a slider 23, also representative of versions with more than one slider 23.

[0040] The slider 23 is preferably made of a flexible plastic or is formed from a spring plate. Likewise, the slider 23 can also have a base body made of any material and a contact surface made of a flexible plastic.

[0041] A second drive is assigned to the at least one slider 23, which causes a lifting or pivoting movement of the slider 23 with a movement component directed transversely to the transport direction T. The first and second drives are independent of one another, so that the stop surface 36 and the slider 23 can be displaced independently of one another. According to one embodiment, the stop surface 36 can move linearly exclusively on a straight line in the horizontal direction, wherein the distance between the two end positions, which form reversal points, corresponds to the stroke of the movement.

[0042] The stop surface 36 can also be pivotally mounted via a pivot axis oriented in the transport direction T, preferably formed at the upper region or at the upper end of the stop surface 36. The pivot range of the stop surface 36 is preferably in the range of one to forty-five degrees.

[0043] According to one embodiment, the slide 23 can move linearly exclusively on a straight line in the horizontal direction, wherein the distance between a first end position and a second end position, which form the reversal points of the movement of the slide 23, corresponds to the stroke of the movement.

[0044] Preferably, the horizontal stroke of the slide 23 is in the range of four millimeters to six millimeters or is five millimeters.

[0045] Further preferably, the slider 23 can be displaceable between a first end position, in which the slider 23, viewed horizontally, extends at least partially beyond the stop surface 36 into the stacking area, and a second end position, in which the slider 23 does not extend beyond the stop surface 36 into the stacking area. The displaceability of the slider 23 between the first and second end positions with respect to the stop surface 36 can be realized both by a purely linear movement, for example in the form of a lifting movement, and by a pivoting movement.

[0046] Preferably, a linear guide is formed that guides the slide 23. Particularly in the case of the second drive being designed as a pneumatic drive, in particular a short-stroke cylinder, such a linear guide can be formed by the piston rod of a pneumatic cylinder.

[0047] The slide 23 can also be pivotally mounted via a pivot axis oriented in the transport direction T, preferably formed at the upper region or at the upper end of the slide 23. The function of the pivot axis can also be realized by a flexural joint. The function of the flexural joint is based on the principle of elastostatics and is achieved by one region having a lower flexural rigidity than two adjacent regions. The reduced flexural rigidity can be achieved by a local cross-sectional reduction.

[0048] Preferably, the pivot axes of the stop surface 36 and / or the slider 23 are arranged above a forming stack surface.

[0049] In particular, the slider 23 can also have an elastic active element arranged between the second drive and the stacking area. The active element can preferably be designed as a hollow cylinder with a longitudinal axis oriented in the transport direction T or as a hollow prism with a longitudinal axis oriented in the transport direction T.

[0050] Viewed in the transport direction T, the active element preferably forms a closed polygonal, round or elliptical outer contour that encloses a central recess.

[0051] To improve the effect on the sheet 33 to be displaced by the movement of the slider 23, the surface of the slider 23 or the active element can be designed with a high degree of roughness. The roughness of the surface can be achieved by a suitable profiling of the surface and / or the formation of knobs or grooves or flutes extending in the transport direction T. Additional suspended or pivoting stop surfaces 39, also called wedlers, can be formed in a lower section of the stop surface 36.

[0052] The first and the second drive are designed in particular to generate lifting or pivoting movements of the stop surface 36 and of the at least one slider 23, which at least temporarily have movements directed transversely to the transport direction T with opposite directions.

[0053] According to one embodiment, the stop surface 36 and the slide 23 can move in opposite directions to each other at any time during their operating phases. In this case, the stop surface 36 and the slide 23 move at the same clock speed but out of phase with each other.

[0054] According to a further embodiment, the movement of the stop surface 36 and the slide 23 occurs at different cycle speeds.

[0055] The further side edge stop 37, arranged on the side of the stacking area opposite the side edge stop 20, comprises a stop element 35 for aligning the falling sheets 33 in the stacking area, wherein the stop element 35 has at least one stop surface 36. In terms of its geometry, arrangement, and displaceability, it corresponds to the stop element 35 of the side edge stop 20, with the difference that the stop element 35 does not have a slider 23. Accordingly, no recesses or slots for sliders 23 are formed in the stop surface 36 of the stop element 35 of the further side edge stop 37.

[0056] The additional side edge stop 37 can also perform a linear lifting or pivoting movement transverse to the transport direction T. The operation of the delivery 01 is described below.

[0057] During the depositing process, the sheets 33 slowed down by the sheet brake 06 fall downwards in the stacking area or sheet drop area and thereby successively form the delivery pile 03. In this case, a stacking surface is formed by the falling sheets 33, wherein between the uppermost sheet 33 forming the stacking surface and the immediately preceding sheet 33, in particular only a small amount of air escapes. The delivery pile 03 is thus formed in particular by fully deposited sheets 33, wherein the uppermost sheets 33 can still lie loosely and the uppermost sheet 33 forms the stacking surface, while the delivery pile 03 is further lowered. The side edge stop 20 and the further side edge stop 37 in the delivery 01 are in particular designed such that the stop surfaces 36 of the upper sections, in particular the guide plates, preferably exclusively or partially above the stacking surface being formed, ieare arranged above a level in which the sheets 33 form the delivery stack 03. During operation of the delivery 01, stacking occurs in particular in such a way that the individual sheets 33 fall in loose succession through the area of ​​the stop surfaces 36 of the side edge stop 20 and the further side edge stop 37 and are aligned laterally by the stop surfaces 36 and the slider 23 performing the lifting or pivoting movements, which can be assisted by a shaking movement of the stop surfaces 36.

[0058] The lateral alignment of the sheets 33 is equally reliable for sheets 33 with the maximum format width, taking the cutting tolerances into account, as well as for sheets 33 whose format width is smaller than the maximum format width. The side edge stop 20 and the additional side edge stop 37 are adjusted such that the minimum distance between their respective stop surfaces 36 corresponds at least to the maximum format width of the sheets 33 to be deposited.

[0059] In the free flight phase, the falling sheets 33 are pushed by the slider(s) 23 in the direction of the stop surface 36 of the further side edge stop 37 and aligned with the stop surface 36 of the further side edge stop 37.

[0060] Format fluctuations F are visible on the delivery stack 03 on the side on which the side edge stop 20 is arranged.

[0061] List of reference symbols

[0062] 01 Display

[0063] 02 Transport system, gripper trolley

[0064] 03 Display stack

[0065] 04 Stack support plate, stack carrier

[0066] 05 Palette

[0067] 06 Bow brake

[0068] 07 Front edge stop

[0069] 08 Non-stop facility

[0070] 09 Non-stop roller blind

[0071] 10

[0072] 11

[0073] 12

[0074] 13

[0075] 14

[0076] 15

[0077] 16

[0078] 17

[0079] 18

[0080] 19

[0081] 20 Side edge stop

[0082] 21

[0083] 22

[0084] 23 sliders

[0085] 24

[0086] 25

[0087] 26

[0088] 27 8 9 0 1

[0089] 32

[0090] 33 sheets

[0091] 34

[0092] 35 stop element

[0093] 36 Stop surface

[0094] 37 Side edge stop, further

[0095] 38

[0096] 39 Stop surface, hanging, pivoting

[0097] T Transport direction

[0098] F Format variation

Claims

Claims 1. Delivery (01) for a sheet-processing machine with a stack support (04) that can be vertically displaced by a stack lifting drive and with transport systems (02) for transporting sheets (33) in a transport direction (T) to a stacking area and for releasing the sheets (33) in the stacking area above the stack support (04), wherein at least one side edge stop (20) with at least one stop element (35) is provided for aligning the falling sheets (33) in the stacking area, wherein the stop element (35) has at least one stop surface (36) and at least one slider (23), wherein a first drive is assigned to the stop surface (36), which causes a lifting or pivoting movement of the stop surface (36) for lateral alignment of the sheets (33) with a movement component directed transversely to the transport direction (T), and a second drive independent of the first drive is assigned to the at least one slider (23),which causes a lifting or pivoting movement of the slider (23) for lateral alignment of the sheets (33) with a movement component directed transversely to the transport direction (T).

2. Display (01) according to claim 1, characterized in that the first and the second drive are designed to generate lifting or pivoting movements of the stop surface (36) and of the at least one slider (23), which at least temporarily have movements directed transversely to the transport direction (T) with opposite directions.

3. Display (01) according to claim 1 or 2, characterized in that the first and the second drive are designed to generate mutually opposite lifting or pivoting movements of the stop surface (36) to the at least one slide (23).

4. Display (01) according to claim 1, 2 or 3, characterized in that the second drive is a pneumatic drive and / or is formed by a short-stroke cylinder.

5. Display (01) according to claim 1, 2, 3 or 4, characterized in that the slide (23) is displaceable between a first end position in which the slide (23) viewed horizontally projects at least partially beyond the stop surface (36) into the stacking area and a second end position in which the slide (23) does not project beyond the stop surface (36) into the stacking area.

6. Display (01) according to claim 1, 2, 3, 4 or 5, characterized in that the at least one slider (23) has a solid-state joint.

7. Display (01) according to claim 1, 2, 3, 4, 5 or 6, characterized in that the at least one slider (23) consists of a flexible plastic or is formed from spring sheet or has a contact surface made of a flexible plastic.

8. Display (01) according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that the at least one slide (23) executes a horizontal stroke in the range of 4 millimeters to 6 millimeters or of exactly five millimeters.

9. Display (01) according to claim 1, 2, 3, 4, 5, 6, 7 or 8, characterized in that the at least one slider (23) has a pivot axis oriented longitudinally to the transport direction (T) and / or wherein one or the pivot axis is arranged above a stacking surface being formed.

10. Display (01) according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, characterized in that the stop surface (36) is formed with at least one recess or a slot for the at least one slider (23) and / or the at least one slider (23) is arranged to pass through a recess or a slot or the recess or the slot.

11. Display (01) according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, characterized in that the stop surface (36) is arranged at least in regions vertically or inclined at an angle of less than ten degrees to the vertical.

12. Display (01) according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11, characterized in that the at least one slider (23) has a rough surface and / or grooves or flutes extending in the transport direction (T).

13. Display (01) according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, characterized in that a side edge stop (20) is formed on one side of the stacking area and a further side edge stop (37) is formed on the opposite side of the stacking area and only the side edge stop (20) has the slider (23).

14. Display (01) according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 or 13, characterized in that the stop surface (36) is formed by a guide plate and / or wherein the stop surface (36) is arranged above a stacking surface being formed.

15. Sheet-processing machine with a delivery (01) according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14.

16. Sheet processing machine with a delivery according to claim 15 designed as Printing machine or as a punching machine.

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