WO2022243051A1

WO2022243051A1 - Sheet-processing machine having at least one transport unit, and method for the track-keeping guidance of at least one transport belt of a sheet-processing machine

Info

Publication number: WO2022243051A1
Application number: PCT/EP2022/062134
Authority: WO
Inventors: Stefan QUENTIN; Heiko Neuwirth
Original assignee: Koenig & Bauer Ag
Priority date: 2021-05-19
Filing date: 2022-05-05
Publication date: 2022-11-24
Also published as: US20230391569A1; DE102021112924A1; EP4237362A1; CN116888060A

Abstract

The invention relates to a sheet-processing machine having at least one transport unit (02) for transporting sheets, wherein the at least one transport unit (02) has at least one belt roller (06), which is designed as an inlet roller (06), and at least one belt roller (07), which is designed as a deflection roller (07), which rollers define a sheet transport plane, wherein at least two further belt rollers (08; 09) of the transport unit (02) are arranged outside the transport plane, wherein at least one belt roller (08) of the at least two further belt rollers (08; 09) is designed as a pivot roller (08) which pivots and/or is pivotable about a pivot axis (S), wherein the pivot axis (S) of the pivot roller (08) is an axis normal of the rotation axis (R) of the pivot roller (08). The invention additionally relates to a method for the track-keeping guidance of at least one transport belt (04) of a sheet-processing machine.

Description

description

Sheet processing machine with at least one transport unit and method for tracking at least one transport belt of a sheet processing machine

The invention relates to a sheet processing machine with at least one transport unit according to the preamble of claim 1 and a method for tracking at least one conveyor belt of a sheet processing machine according to the preamble of claim 33.

In sheet processing machines, such as printing presses or punching machines, sheets are transported by means of transport units. One embodiment of the transport units has conveyor belts. For example, in a feeder, sheets are separated from a stack of sheets and fed to subsequent units by means of a transport unit designed as a belt table. In order to ensure stable transport of the sheets, tracking of the conveyor belt must be ensured without the conveyor belt running off the side of its leading rollers. A lateral running off of the conveyor belt is to be avoided, as this leads to lateral fraying and/or destruction of the conveyor belt.

DE 202006001 851 U1 discloses a device on a suction belt table for transporting sheet material from a sheet feeder to a sheet processing machine with one or more conveyor belts, the conveyor belts being drivable at least via deflection rollers and being guided endlessly around the belt table and being tensionable by means of tensioning devices. By means of an elevation, called crowning, in a partial area of a tensioning roller with a cross-sectional contour that extends symmetrically to the spread of the guide area targeted lateral guidance of the conveyor belt is achieved.

US 2009/0145729 A1 teaches a device for correcting an inclined position of a circulating conveyor belt, which is guided in a tensioned state between a roller driving the conveyor belt and another roller. For this purpose, a correction roller is provided which is in contact with the conveyor belt and whose angle of inclination is adjusted via a mechanism. The mechanism acts laterally on one of the bearings of the correction rollers and comprises a drive body, in particular a motor, controlled by a control unit, and a transmission mechanism, in particular comprising a cam gear, which translates the drive movement of the drive body into an inclination of the correction roller. The drive body performs the drive motion intermittently, allowing for quick and precise tilt angle control.

A device for feeding sheets is known from DE 102019 122496 A1, a belt roller of a suction belt table being designed as a pendulum roller. The pendulum roller has two degrees of freedom and allows both a tilting movement of the roller transverse to the transport direction and a rotary movement in the transport direction.

In this case, the pendulum roller has an axis and a roller body which is arranged coaxially to the axis and is rotatable about the axis and is designed as a hollow cylinder and has a self-aligning bearing which acts between the axis and the roller body.

The invention is based on the object of creating a sheet-processing machine with at least one transport unit and a method for guiding at least one transport belt of a sheet-processing machine on track.

The object is achieved according to the invention by the features of claim 1 and claim 33. A sheet-processing machine with at least one transport unit for transporting sheets is preferably created. The at least one transport unit preferably has at least one belt roller designed as an infeed roller and at least one belt roller designed as a deflection roller, which define a transport plane of sheets. At least two further belt rollers of the transport unit are preferably arranged outside the transport plane. At least one additional belt roller, preferably at least one of the at least two additional belt rollers, is preferably designed as a pivot roller that pivots and/or pivots about a pivot axis. The pivoting axis of the pivoting roller is preferably an axis normal to the axis of rotation of the pivoting roller.

A method for tracking at least one conveyor belt of a sheet-processing machine is preferably created. The at least one conveyor belt is preferably guided around at least one belt roller designed as an infeed roller and at least one belt roller designed as a deflection roller. The at least one infeed roller and the at least one deflection roller preferably define a sheet transport plane. The at least one conveyor belt is preferably guided around at least two other belt rollers of the transport unit outside of the transport plane. At least one further belt roller designed as a swiveling roller, preferably at least one belt roller of the at least two further belt rollers designed as a swiveling roller, preferably swivels about a swiveling axis. The pivoting axis of the pivoting roller is preferably an axis normal to the axis of rotation of the pivoting roller.

The advantages that can be achieved with the invention are, in particular, that the quality of sheet transport is improved. In particular, the uniformity of the sheet transport is improved transversely to the transport direction. Advantageously, the at least one conveyor belt is guided along a track. Advantageously equals the pivoting roller compensates for at least temporary deviations in the belt run from the track-keeping guide. Advantageously, the at least one conveyor belt is prevented from laterally running off at least one belt roller. Advantageously, the response time to a conveyor belt that leaves its central tracking is reduced. Advantageously, the reaction is stepless. The centering of the at least one conveyor belt with regard to optimal belt travel is advantageously accelerated. The service life of the at least one conveyor belt is advantageously increased. The maintenance effort and service costs are advantageously reduced.

The swivel axis of the swivel roller is advantageously arranged along a rotation axis of the swivel roller within a travel path of at least one conveyor belt between a first face and a second face of the swivel roller, preferably in the middle of the travel path, more preferably in the middle between the first face and the second face of the swivel roller. Advantageously, during pivoting about the pivot axis, which is preferably arranged in the middle, the at least one conveyor belt is guided towards the middle of the travel path, preferably towards the middle of the roller, ie it is returned to its central track.

The at least one pivoting roller is advantageously designed to pivot automatically about the pivot axis and/or pivots automatically. In particular, in addition to the movement of the at least one conveyor belt, there is advantageously no need for any additional sensors, for example sensors for detecting the edge of the conveyor belt, and/or a drive that pivots the at least one belt roller, for example a pneumatic cylinder, in order to correct the tracking of the at least one conveyor belt and /or to guarantee. Advantageously, there is an automatic reaction to a conveyor belt running off to the side and/or to external influences which negatively influence the tracking of the at least one conveyor belt. External influences are, in particular, uneven stretching of the at least one conveyor belt and/or the quality of the at least one conveyor belt and/or the homogeneity of the at least one conveyor belt and/or asymmetric loads on the at least one conveyor belt, for example due to brushes or pressing means lying on it, and/or the alignment of the belt rollers guiding the at least one conveyor belt , in particular deviations of the axis normal from a direction of movement of the at least one conveyor belt and/or axis parallelism of the belt rollers. Advantageously, the at least one pivoting roller minimizes the effort involved in setting it up for the first time. Advantageously, there is no need for subsequent corrections to the running of the tape after it has been set for the first time.

Advantageously, the at least one conveyor belt is automatically retensioned. Preferably, at least one additional belt roller, preferably the respective additional belt roller, can be displaced or displaced and/or fixed or fixed in the displaced position with at least one tensioning device in order to change the tension of the at least one conveyor belt relative to the conveyor belt. An additional clamping device is advantageously eliminated. The at least one tensioning device preferably has the at least one pivot roller.

At least the at least one pivot roller is advantageously designed as a cylindrical belt roller. Cylindrical rollers are advantageously simple and inexpensive to manufacture. The use of the at least one cylindrical belt roller can advantageously reduce the manufacturing costs of the belt rollers. Advantageously, the at least one conveyor belt is only subjected to low loads, for example because overstretching due to crowned belt rollers can be reduced. Advantageously, at least one belt roller, preferably at least the pivoting roller, more preferably at least two belt rollers, is further preferred due to the cylindrical design of at least three belt rollers, the wear of at least one

Conveyor belt reduced.

Embodiments of the invention are illustrated in the drawings and in

described in more detail below.

Show it:

1 shows an exemplary feeder for feeding sheets with a downstream transport unit designed as a suction belt table;

FIG. 2 shows a perspective side view of an exemplary transport unit with two transport belts, each rotating over a swiveling roller;

3 shows a schematic representation of a guide, realized by belt rollers, of the at least one circulating conveyor belt of the transport unit;

4 shows a perspective view of a first preferred embodiment of a belt roller designed as a swiveling roller and its tensioning roller positioned upstream in the direction of movement of a conveyor belt, with a tensioning device having a spring system;

FIG. 5 shows another view of the belt roller designed as a swiveling roller and its tensioning roller positioned upstream in the direction of movement of a conveyor belt with the tensioning device according to the preferred embodiment according to FIG. 4;

Fig. 6 designed as a pivot roller belt roller and its in

Direction of movement of a conveyor belt upstream tensioning roller with the tensioning device according to the preferred embodiment of FIG. 4 and FIG. 5 in lateral partial cut;

7 shows a perspective view of an alternative preferred embodiment of the belt roller designed as a swiveling roller and its tensioning roller upstream in the direction of movement of a conveyor belt, the tensioning device having at least one rocker arm;

Fig. 8 designed as a pivoting roller belt roller and its in

Direction of movement of a conveyor belt upstream tensioning roller with the tensioning device according to the preferred embodiment of Figure 7 in partial lateral section.

9 shows a perspective view of a further alternative preferred embodiment of the belt roller designed as a swiveling roller and its tensioning roller upstream in the direction of movement of a conveyor belt, with the tensioning device having at least one linear guide;

Fig. 10 the belt roller designed as a pivoting roller and its in

Direction of movement of a conveyor belt upstream tensioning roller with the tensioning device according to the preferred embodiment of FIG. 9 in partial lateral section.

A sheet-processing machine is preferably designed as a printing machine and/or a punching machine. The sheet processing machine preferably has at least one device configured as feeder 01 for feeding sheets, at least one processing unit and at least one delivery. The at least one processing unit is preferably a printing unit, preferably an offset printing unit, and/or a varnishing unit and/or an inkjet printing unit and/or a die-cutting unit. For example, the sheet-processing machine has at least one printing unit and additionally at least one coating unit. For example, additionally or alternatively, the sheet-processing machine has at least one printing unit and additionally at least one punching unit.

The sheet-processing machine has at least one transport assembly 02 for transporting at least one sheet. For example, the at least one transport unit 02 is arranged between the at least one feeder 01 and at least one first processing unit, i.e. preferably the first processing unit along a sheet transport path. For example, additionally or alternatively, at least one transport unit 02 is arranged between at least two consecutive processing units. For example, additionally or alternatively, at least one transport unit 02 is located between a last processing unit, i.e. preferably the last processing unit along the transport path for sheets, and the at least one delivery, for example directly upstream of the at least one delivery. The at least one transport unit 02 is preferably designed as a belt table 02.

The at least one transport unit 02, preferably belt table 02, is preferably followed by at least one feed table with front lays, the system, and/or at least one processing unit of the sheet-processing machine. The at least one transport unit 02, preferably the at least one belt table 02, preferably feeds at least one sheet to the feed table with front lays and/or to the at least one processing unit of the sheet-processing machine. Alternatively, for example, the at least one delivery unit 02 is arranged downstream of the at least one transport unit 02, and the at least one transport unit 02 then guides the sheets to the at least one delivery unit.

The device for feeding sheets is preferably embodied as feeder 01 and preferably has a main stack carrier, in particular a stack plate. on a stack consisting of the sheets can preferably be and/or is positioned on the main stack carrier. The stacking plate is preferably attached to at least one means of transport, for example to at least two means of transport.

At the rear and/or preferably on at least one side, for example on both sides, of the stack, blowers are provided for pre-loosening the sheets on the stack and/or for blowing under the sheets during transport. In order to be able to form an air cushion that supports the sheets, side plates or guide elements that laterally delimit the stack are, for example, additionally arranged on the side of the stack.

At least one sheet separator 03 is preferably arranged in the area of the top of the stack. Sheet separator 03 preferably has at least one, for example at least two, separating suckers and at least one, for example at least two, transport suckers. The sheet separator 03 is preferably arranged in the feeder 01 so that it can be adjusted in height. In addition, the sheet separator 03 is preferably mounted so that it can be displaced in or against a transport direction T in order to adapt the format. The sheet separator 03, in particular its at least one suction separator, is preferably designed to separate the sheets from the stack in cycles. The at least one transport sucker preferably grasps the separated sheets. The at least one separating sucker preferably conveys the separated sheets in transport direction T.

The transport direction T provided in particular for transporting sheets is a direction that preferably points from a first unit of the sheet processing machine to a last unit of the sheet processing machine, in particular from the at least one feeder 01 on the one hand to a delivery or a substrate delivery device on the other hand, and/ or which preferably points in a direction in which the at least one sheet is transported, in particular from a first contact with the sheet-processing machine to a last one Contact with the sheet processing machine. The spatial area provided for the transport of a sheet, which the at least one sheet occupies at least temporarily when it is present, is the transport path. The transport path is defined by at least one transport means, in particular by at least one printing material guide element. The at least one printing material guide element is preferably designed as at least one roller and/or at least one cylinder and/or at least one support and/or at least one other device for guiding the at least one sheet. The working width of the sheet-processing machine is preferably oriented orthogonally to the transport direction T, in particular in a transverse direction. The working width of the sheet processing machine is preferably at least 100 cm (one hundred centimetres), more preferably at least 150 cm, even more preferably at least 160 cm, even more preferably at least 200 cm and even more preferably at least 250 cm.

At least one scanning device that detects the height level of the stack is preferably arranged in the stack area. The at least one transport suction cup preferably transports the sheets to the at least one transport unit 02, preferably to the at least one transport unit 02 embodied as a belt table 02.

The at least one transport unit 02, preferably the at least one belt table 02, preferably has a transport plane in which the sheets are transported by at least one circulating conveyor belt 04. The sheets are preferably transported in a horizontal position and are arranged vertically above the at least one conveyor belt 04. Alternatively, for example, the sheets are transported hanging and are arranged in the vertical direction below the at least one conveyor belt 04. The at least one transport assembly 02 preferably has at least one, for example at least two or three, circulating conveyor belt 04. The at least one conveyor belt 04 is preferably connected via belt rollers 06; 07; 08; 09 led. Preferably, a section of the at least one conveyor belt 04 over at least two belt rollers 06; 07 in the transport level. The at least one transport unit 02 preferably has at least one belt roller 06 embodied as an infeed roller 06 and at least one belt roller 07 embodied as a deflection roller 07, which define the transport plane of sheets. The at least one infeed roller 06 is preferably the first belt roller 06 of the at least one transport unit 02 along the sheet transport path. The at least one deflection roller 07 is preferably the last belt roller 07 of the at least one transport unit 02 along the sheet transport path.

In addition to the at least two belt rollers 06; 07 is preferably at least one, preferably at least two, additional belt rollers 08; 09, which guides the at least one conveyor belt 04 outside, in particular below or above, the transport plane. The at least two other belt rollers 08; 09 of the transport unit 02, preferably at least one pivoting roller 08 and/or at least one tensioning roller 09, are preferably arranged outside the transport plane. The at least two, preferably at least three, more preferably at least four, for example two or three or four, further belt rollers 08; 09 arranged, over which the at least one conveyor belt 04 is guided. The at least one additional belt roller 08; 09 is thus preferably arranged outside, more preferably below or above, the transport plane. When sheets are guided horizontally, the at least one additional belt roller 08; 09 preferably arranged below the transport level. In the case of hanging sheets, the at least one additional belt roller 08; 09 preferably arranged above the transport level.

Preferably, at least one belt roller 08 of the other, preferably the at least two other, belt rollers 08; 09 than about a pivot axis S pivoting and/or swiveling pivoting roller 08. A belt roller 08 configured in this way preferably has a corrective belt guiding function, in particular when force and/or load changes occur in or on the at least one conveyor belt 04.

Preferably, at least one belt roller 09 of the other, preferably the at least two other, belt rollers 08; 09 designed as a tension roller 09. The at least one additional belt roller 09 embodied as a tensioning roller 09, which differs from the additional belt roller 08 embodied as a pivoting roller 08, is preferably arranged upstream of the pivoting roller 08 in the direction of movement of the at least one conveyor belt 04. The at least one tensioning roller 09 preferably has axle mounts that are adjustable or fixed on both sides. The at least one tensioning roller 09 is preferably adjusted on both sides of its axle mounts or is preferably fixed on both sides of its axle mounts.

The at least one transport unit 02, in particular the at least one transport unit 02 embodied as a belt table 02, preferably has at least one, preferably circulating, conveyor belt 04. The at least one conveyor belt 04 is preferably at least the at least one infeed roller 06 and the at least one deflection roller 07 and the at least one pivoting roller 08, preferably the at least one infeed roller 06 and the at least one deflecting roller 07 and the at least one pivoting roller 08 and the at least one tensioning roller 09 , circumferentially trained. The at least one conveyor belt 04 is preferably stationary with the at least one infeed roller 06 and the at least one deflection roller 07 and the at least one pivoting roller 08, preferably with the at least one infeed roller 06 and the at least one deflecting roller 07 and the at least one pivoting roller 08 and the at least one tensioning roller 09, in touch. Instead of a single conveyor belt 04, for example, there are also two or more arranged at a distance from one another, via the at least two as infeed roller 06 and as deflection roller 07 formed belt rollers 06; 07 and at least one, preferably at least two, additional belt rollers 08; 09 guided conveyor belts 04 are provided. Each of the at least two circulating conveyor belts 04 is preferably assigned a pivoting roller 08, preferably its own pivoting roller 08 and/or one that pivots independently of other pivoting rollers 08. The at least one transport assembly 02 preferably has at least two, for example two or three or four, circulating conveyor belts 04. The at least two circulating conveyor belts 04 are preferably conveyed over the belt rollers 06; 07; 08; 09 led. Each of the at least two circulating conveyor belts 04 is preferably guided over a swiveling roller 08. The at least two circulating conveyor belts 04 are preferably arranged parallel to one another and/or spaced apart from one another. The at least one conveyor belt 04, preferably the conveyor belts 04, is preferably configured as a suction belt, preferably a suction belt. The at least one conveyor belt 04 designed as a suction belt preferably has openings. The at least one suction belt is preferably supplied with suction air from suction boxes that are integrated, for example, in the transport unit 02, preferably the belt table 02. As a result of the effect of the suction air, sheets that are preferably to be transported are held on conveyor belt 04, which is designed as a suction belt.

Between the transport suction cups and the at least one conveyor belt 04 of the at least one transport unit 02, preferably belt table 02, there is preferably a curved flap connected to a pivoted shaft. The functional unit consisting of the shaft and curved flap is also referred to as the flap shaft in technical jargon. The flap shaft preferably extends across the width of the stack. For each sheet to be conveyed, the sheet flap is pivoted from a vertical position, in which it forms a stop, into a horizontal position, in which it forms a guide surface.

With the at least one conveyor belt 04 of the at least one transport unit 02, preferably the belt table 02, so-called timing rollers preferably work together. The timing rollers are preferably associated with a pivotably mounted timing roller shaft. The timing roller shaft is preferably pivoted in time with the sequence of sheets, so that the timing rollers guide the front area of each sheet against the at least one conveyor belt 04.

At least one drive 16; 17; 18 is provided, which is preferably connected to a machine controller. To drive the sheet transport effecting components are preferably several individual drives 16; 17; 18, for example a first drive and/or a second drive 16 and/or a third drive 17 and/or a fourth drive and/or a fifth drive 18, which are preferably independently controllable and/or controlled. Preferably, the individual drives 16; 17; 18, for example the first drive and/or the second drive 16 and/or the third drive 17 and/or the fourth drive and/or the fifth drive 18, is connected to a controller, in particular a machine controller.

At least one belt roller 06; 07; 09 of the belt rollers 06; 07; 08; 09, preferably which is different from pivoting roller 08, preferably has at least one drive, preferably the drive configured as the first drive, for driving the at least one conveyor belt 04. The at least one conveyor belt 04 is preferably arranged by the at least one drive on at least one belt roller 06; 07; 09 of the belt rollers 06; 07; 08; 09, which is different from the pivot roller 08, driven. The first drive is preferably designed as a motor, preferably an electric motor and/or a synchronous motor. The at least one drive preferably drives the at least one belt roller 06; 07; 09 rotary on. The movement of the drive, in particular the first drive, is preferably transmitted by friction to the at least one conveyor belt 04. The at least one belt roller 06; 07; 09 has a surface roughness Rz of at least 70, preferably at least 85, more preferably at least 100, and/or at most 135, preferably at most 120, more preferably at most 115, for example 108. Due to the surface roughness of the at least one belt roller 06; 07; 09 optimal transmission of the drive torque to the at least one conveyor belt 04. The first drive is, for example, directly attached to the axis of rotation R of the at least one belt roller 06; 07; 09 or is associated, for example, via at least one pair of gears, or a belt drive, in particular a toothed belt drive, with the at least one belt roller 06; 07; 09 connected in terms of transmission. For example, in the case of a shingled sheet feed using the at least one transport unit 02, the at least one conveyor belt 04 preferably exhibits a pulsating movement in its direction of movement.

The direction of movement of the at least one conveyor belt 04 is preferably the direction in which the at least one conveyor belt 04 revolves. The direction of movement preferably changes according to the guidance of the at least one conveyor belt 04. In the section of the transport plane, the direction of movement of the at least one conveyor belt 04 is, for example, parallel to the transport direction T of the sheets. In the section of the at least one conveyor belt 04 outside the transport plane, in particular above or below, the direction of movement preferably has at least one component which is directed counter to the transport direction T.

In a first, preferred embodiment, the at least one belt roller 06 configured as an infeed roller 06, which is preferably positioned along a sheet transport path as the first belt roller 06 of the belt rollers 06; 07, the at least one drive, preferably the drive configured as the first drive, more preferably the at least one drive for driving the at least one conveyor belt 04. The at least one conveyor belt 04 is preferably the at least one drive arranged on the at least one infeed roller 06, which along the transport path of sheets as the first belt roller 06 of the belt rollers 06; 07 is arranged driven. Advantageously, this enables simple mechanical coupling to the at least one drive of feeder 01 and/or to a single-speed shaft of feeder 01. There is preferably a simple, preferably automatic synchronization with the movement sequences of feeder 01. A section of the at least one conveyor belt 04 , outside the transport plane is preferably pulled. Preferably, since a tracking effect of pivoting roller 08 depends on the tensile force acting on the at least one conveyor belt 04 at the position of pivoting roller 08, the arrangement of the drive on the at least one infeed roller 06 preferably supports the tracking effect of pivoting roller 08. Preferably, the at least another belt roller 07 that defines the transport plane, preferably the at least one deflection roller 07, has a crowned shape. Preferably, the at least one additional belt roller 07 that defines the transport plane, preferably the at least one deflection roller 07, can be adjusted transversely to the direction of travel of the conveyor belt 04 and/or can be moved transversely to the direction of travel of the conveyor belt 04 into an inclined position and back. The design of the at least one additional belt roller 07 that defines the transport plane, preferably the at least one deflection roller 07, preferably improves tracking of the at least one conveyor belt 04 at the position of this belt roller 07 and/or increases the stability of the belt guide.

In a second, alternative, embodiment, the at least one belt roller 07 configured as a deflection roller 07, which along the transport path of sheets is the last belt roller 07 of the belt rollers 06; 07, the at least one drive, preferably the drive configured as the first drive, more preferably the at least one drive for driving the at least one conveyor belt 04. The at least one conveyor belt 04 is preferably driven by the at least one drive arranged on the at least one deflection roller 07, which is the last belt roller 07 of the belt rollers 06; 07 is arranged driven.

In a third, alternative, embodiment, the at least one additional belt roller 09 configured as a tensioning roller 09 has the at least one drive, preferably the drive configured as the first drive, more preferably the at least one drive for driving the at least one conveyor belt 04. The at least one conveyor belt 04 is preferably driven by the at least one drive arranged on the at least one other belt roller 09 embodied as a tensioning roller 09.

In the second and in the third embodiment, the at least one conveyor belt 04 on the sheet-transporting side of the transport unit 02, which is preferably embodied as a belt table 02, is therefore preferably embodied as a pulling belt. This has the advantage that the sheets lying on the belt table 02 as a stack of sheets are transported more smoothly and evenly. Preferably, fewer disturbances result from this. In the second and in the third embodiment, the section of the at least one conveyor belt 04 guided in the transport plane is advantageously pulled, as a result of which the belt tension is preferably reduced compared to a pushed belt guide and/or the loads on the at least one conveyor belt 04 are reduced compared to a pushed belt guide.

For example, at least one belt roller 06; 07; 09 of the belt rollers 06; 07; 08; 09, which is different from the pivot roller 08, crowned or conical. A crowned belt roller 06; 07; 08; 09, also known as a hump roller, for example, preferably has a cross-sectional thickening that differs from the cylindrical shape. The at least one crowned belt roller 06; 07; 08; 09 has a minimal cross-section on at least one end face. Preferably, the Cross-sectional thickening in the path of a guided object, preferably the at least one conveyor belt 04, preferably in the middle of its path, more preferably in the middle between the end faces. For example, the at least one crowned belt roller 06; 07; 08; 09 convex, also known as cambered. Alternatively, for example, the at least one crowned belt roller 06; 07; 08; 09 trapezoidal. A tapered belt roller 06; 07; 08; 09 preferably has a conical cross-sectional change in the lateral surface. For example, a tapered belt roller 06; 07; 08; 09 has a maximum cross-section on one end face and a minimum cross-section on the opposite end face. Alternatively, for example, a conical belt roller 06; 07; 08; 09, then also called biconical, for example, has the maximum cross section at a position between the two end faces, with the cross section decreasing conically towards both end faces. For example, combinations are also possible, with at least one belt roller 06; 07; 09 has a first crowned or conical design and at least one second belt roller 06; 07; 09 has a different crowned or conical design.

In a preferred embodiment, the belt roller 06; 07; 09, preferably called the drive roller, has a cylindrical shape. The belt roller 06; 07; 09 is preferably cylindrical. Due to the cylindrical design of the belt roller 06; 07; 09, the wear on the at least one guided conveyor belt 04 is preferably reduced compared to a crowned or conical design. A cylindrical belt roller 06; 07; 08; 09 preferably has a uniform cross section along its axis of rotation R. Cylindrical rollers should preferably also be understood to mean rollers which have a cylindrical shape and which are rounded off, stepped, beveled or stepped towards their end faces. In an alternative embodiment, the belt roller 06; 07; 09 the convex or conical shape. Thus, the belt roller 06; 07; 09 in the system in addition to the driving function, preferably also a centering function.

In addition to a belt roller 06; 07; 09 is assigned a second drive 16, for example, which is assigned to the shaft carrying the sheet flap. The second drive 16 is designed, for example, to jointly drive the timing roller shaft and the shaft connected to the sheet flap. The timing roller shaft and/or the shaft connected to the sheet flap are preferably connected to the second drive 16 via a gear. Additionally or alternatively, for example, a third drive 17 is assigned to the main stack carrier for its vertical displacement. If a non-stop device is configured, the main stack carrier preferably interacts with an auxiliary stack carrier when changing the stack, which is preferably designed as a rake or roller blind and which is preferably assigned a fourth drive for its vertical displacement. A fifth drive 18 is additionally or alternatively configured, for example, to drive the sheet separator 03 and/or the transport suckers.

At least one, for example two, sheet arrival sensors are configured to detect the arrival of the sheets, for example, and are preferably located at the end of the at least one transport unit 02, which is preferably configured as a belt table 02. The at least one sheet arrival sensor can preferably be used to detect the position of the sheets at a specific point in time before the sheets enter the processing unit. The at least one sheet arrival sensor preferably generates first signals representing the arrival of the sheets for a sequence of sheets. A clock generator is designed to detect the angular position of the at least one processing unit preferably generates the angular position of the at least one processing unit representing second signals. The feeding of sheets to the at least one processing unit is preferably only possible when the at least one processing unit, in particular its sheet-guiding cylinder, is in a specific angular position. To achieve this, the individual drives 16; 17; 18, for example the first drive and/or the second drive 16 and/or the third drive 17 and/or the fourth drive and/or the fifth drive 18, are actuated accordingly. The drives 16; 17; 18, for example the first drive and/or the second drive 16 and/or the third drive 17 and/or the fourth drive and/or the fifth drive 18, as well as the clock generator and sheet arrival sensor are preferably connected to a controller, preferably the machine controller .

The controller preferably controls the first drive of the relevant belt roller 06; 07; 09 depending on the signals of the clock generator, in particular the second signals. In other words, the movement of the conveyor belt(s) 04 of the transport unit 02, preferably the belt table 02, preferably exclusively follows the movement of the at least one processing unit. The second drive 16 is preferably controlled by the controller, unlike the first drive, not only according to the second signals from the clock generator but also according to the first signals from the sheet arrival sensor. In order to control the first and/or the second drive 16, clock-related speed profiles are preferably input to the controller. The speed profiles have, for example, a discontinuous course of speed. Preferably, the controller determines the phase angles of the first signals in relation to the phase angles of the second signals and controls the second drive 16 depending on the determined phase angles of the first signals in relation to the phase angles of the second signals. In this way, the occurrence of sheets arriving too early (early sheets) or the occurrence of sheets arriving too late (late sheets) is preferably inferred and counteracted accordingly. The controller is designed, in particular, to control the second drive 16 in such a way that, depending on the phase positions of the first signals in relation to the phase positions of the second signals, it shifts the phase positions of the speed profile of the second drive 16 in relation to the phase positions of the speed profile of the first drive in a leading or lagging manner or controls the second drive 16 with a speed profile that has an increased or a reduced average speed. If, for example, a late sheet is determined by determining the phase positions, this is caused, for example, by an increased speed of the fifth drive 18 of the sheet separator 03 and/or the transport sucker and by an increased speed of the second drive 16 on the sheet flap compared to the conveyor belt 04, so that the leading edge of the sheet subsequent sheets preferably arrive earlier at the processing plant. The shingle length between the sheets is preferably reduced in this case. The controller reacts to a premature sheet, for example, in a corresponding manner, with the difference that the speed of the fifth drive 18 and the second drive 16 is reduced and the shingle length, ie the distance between the front edges of the sheets, is increased.

It is also possible to provide several sheet arrival sensors controlling the sheets.

At least one belt roller 06; 07; 08; 09 of the belt rollers 06; 07; 08; 09, preferably each belt roller 06; 07; 08; 09, each has a first end face and a second end face and at least one lateral surface.

The at least one belt roller 06; 07; 08; 09, preferably each belt roller 06; 07; 08; 09 preferably has an axis of rotation R. The axis of rotation R of the at least one belt roller 06; 07; 08; 09 is directed from the first face to the second face. The at least one belt roller 06; 07; 08; 09, preferably each belt roller 06; 07; 08; 09, is preferably designed to rotate and/or rotate about its axis of rotation R. Preferred is the Axis of rotation R of the at least one belt roller 06; 07; 08; 09 perpendicular to the transport direction T, preferably in the transverse direction and/or in the direction of the working width. For example, a normal to the axis of rotation R of at least one belt roller 06; 07; 08; 09, preferably all belt rollers 06; 07; 08; 09, preferably in a direction orthogonal to the axis of rotation R, preferably in or opposite to the direction of movement of the at least one conveyor belt 04, more preferably in or opposite to the direction of transport T or in or opposite to a vertical direction. In the foregoing and in the following, an axis of rotation R of a body designates that straight line about which this body can be rotated without the view of the body changing. The axis of rotation R is thus preferably at the same time an axis of symmetry of the body. During a rotation about the axis of rotation R, the individual points of the body preferably move in circles in planes perpendicular to the respective axis of rotation.

The axes of rotation R of at least two belt rollers 06; 07; 08; 09, preferably at least three belt rollers 06; 07; 08; 09, more preferably all belt rollers 06; 07; 08; 09, arranged parallel to each other. The at least one conveyor belt 04 is thus preferably kept in line by the at least two belt rollers 06; 07; 08; 09, preferably via the at least three belt rollers 06; 07; 08; 09, more preferably over all belt rollers 06; 07; 08; 09, led.

The at least one belt roller 06; 07; 08; 09, preferably at least the at least one swivel roller 08, more preferably at least two belt rollers 06; 07; 08; 09, more preferably at least three belt rollers 06; 07; 08; 09, more preferably each belt roller 06; 07; 08; 09 of the at least one transport unit 02 is preferably of cylindrical design. The at least one pivoting roller 08 is preferably of cylindrical design. Preferably, at least the at least one pivoting roller 08 and the belt roller 06; 07; 09 cylindrical. The at least one is preferred Infeed roller 06 and the at least one pivoting roller 08 and the at least one tensioning roller 09 are cylindrical. More preferably, the at least one infeed roller 06 and/or the at least one deflection roller 07 and/or the at least one pivoting roller 08 and/or the at least one tensioning roller 09 are cylindrical. Preferably, the cylindrical design facilitates the production of these belt rollers 06; 07; 08; 09. In a preferred embodiment, all belt rollers 06; 07; 08; 09 of the at least one transport assembly 02 is cylindrical. The cylindrical design of the at least one belt roller 06; 07; 08; 09 the wear of the at least one conveyor belt 04, preferably because the expansion and contraction of the conveyor belt 04 and the associated lateral relative movement, as occurs, for example, with crowned belt rollers, is minimized.

For example, additionally or alternatively, at least one belt roller 06; 07; 09 of the belt rollers 06; 07; 08; 09, which is different from the pivot roller 08, crowned or conical. For example, the at least one deflection roller 07 is crowned or conical, preferably in particular if the at least one infeed roller 06 has the first drive. Alternatively, for example, the crowned or conical belt roller 06; 07; 09 the at least one drive.

The at least one pivoting roller 08 is preferably designed to pivot automatically about the pivot axis S. The at least one pivoting roller 08 preferably corrects belt tracking errors automatically. Automatic pivoting of the at least one pivoting roller 08 about its pivot axis S refers above and below to preferably pivoting, preferably caused exclusively by the influence of the at least one conveyor belt 04, preferably its movement in the direction of movement during circulation. The at least one pivoting roller 08 preferably has no additional drive that pivots the pivoting roller 08 about its pivot axis S, in particular none additional drive in addition to a movement of the at least one conveyor belt 04 in its direction of movement. The belt travel of the at least one conveyor belt 04 is preferably regulated purely mechanically. Preferably, no sensors or controls are needed to regulate tape travel. The at least one pivoting roller 08 is preferably automatically pivoted from a first position, pivoted in the mathematically positive direction of rotation, to a position in which the axis of rotation R of the pivoting roller 08 is parallel to at least one axis of rotation R of at least one of the other belt rollers 06; 07; 09 is arranged, and / or designed to pivot in the opposite direction. The at least one pivoting roller 08 is preferably automatically pivoted from a second position, pivoted in the mathematically negative direction of rotation, to the position in which the axis of rotation R of the pivoting roller 08 is parallel to at least one axis of rotation R of at least one of the other belt rollers 06; 07; 09 is arranged, and / or designed to pivot in the opposite direction. The at least one pivoting roller 08 is preferably positioned between the first pivoted position and the second pivoted position and the position in which the axis of rotation R of the pivoting roller 08 is parallel to at least one axis of rotation R of at least one of the other belt rollers 06; 07; 09 is arranged, designed to pivot automatically.

The at least one pivoting roller 08 preferably enables the strap guide to be adjusted easily. The at least one swivel roller 08 preferably enables the system, in particular the transport unit 02, to react quickly to disruptive influences and/or changes on the at least one conveyor belt 04. Preferably, a self-regulating and/or constantly centered belt run of the at least one conveyor belt 04 is achieved, preferably with a low Setting effort realized. The response time to a conveyor belt 04 running off track is preferably quick and/or stepless. A conveyor belt 04 running out of track is preferably returned to its track. Preferably, sheet feeding is stabilized. A central guide for the at least one conveyor belt 04 is preferably its track-keeping guidance on the at least one belt roller 06; 07; 08; 09, especially without it running off to the side.

The at least one pivoting roller 08, preferably the one pivoting roller 08 per conveyor belt 04, has the pivot axis S. In the foregoing and in the following, a pivot axis S of a body preferably designates that axis about which this body can be pivoted and/or is pivoted. The view of the body preferably changes in the process. During a pivoting movement about the pivot axis S, the individual points of the body preferably move in circles in planes perpendicular to the respective pivot axis S. In contrast to a rotation, a complete rotation of the body, i.e. by 360°, is preferably not achieved with a pivot. For example, a maximum deflection of the body during a pivoting movement about its pivot axis S is 180°. Both the initial position and the at least one pivoted position of the body, preferably the at least one pivoting roller 08, are preferably located within a plane perpendicular to pivot axis S, preferably pivot axis S, of pivoting roller 08. The pivot axis S of the at least one pivot roller 08 is preferably an axis normal to the axis of rotation R of the pivot roller 08.

A vector that is perpendicular to a plane and/or surface and/or axis and/or direction is its normal vector. The vector which is perpendicular to an axis is preferably referred to above and below as its axis normal.

The pivot axis S of the at least one pivot roller 08 is preferably along the axis of rotation R of the pivot roller 08 within a travel path, preferably in the middle to the travel path of the at least one conveyor belt 04 between the first end face and the second end face of pivoting roller 08. The pivot axis S of the at least one pivot roller 08 is more preferably arranged along the axis of rotation R of the pivot roller 08 centrally between the first end face and the second end face of the pivot roller 08. The at least one pivoting roller 08 is preferably designed to pivot and/or pivot symmetrically about the pivot axis S. The pivot axis S is preferably arranged at the position of the center of gravity of the pivot roller 08. In a two-dimensional projection of the pivoting roller 08 parallel to the axis of rotation R of the pivoting roller 08, the pivoting axis S is preferably arranged at the position of the centroid of the area, i.e. preferably centrally along the axis of rotation R, in particular centrally between the first end face and the second end face of the pivoting roller 08.

The transport direction T of sheets and a direction perpendicular thereto, preferably with the vertical direction being perpendicular both to the transport direction T and to the direction of the working width, preferably span a projection plane. In the projection plane, a first segment is preferably located between the axis of rotation R of the at least one infeed roller 06 and the axis of rotation R of the at least one deflection roller 07. In the projection plane, a second segment is preferably located between the axis of rotation R of the at least one infeed roller 06 and the axis of rotation R of the pivoting roller 08. In the projection plane, the first section between the axis of rotation R of the at least one infeed roller 06 and the axis of rotation R of the at least one deflection roller 07 preferably has an opening angle relative to the second section between the axis of rotation R of the at least one infeed roller 06 and the axis of rotation R of the pivoting roller 08. The opening angle is preferably acute. The opening angle is preferably at most 45° (forty-five degrees), preferably at most 40° (forty degrees), more preferably at most 30° (thirty degrees), more preferably at most 25° (twenty-five degrees), more preferably at most 20° (twenty degrees) , more preferred maximum 15° (fifteen degrees). The opening angle is preferably the angle between the first section and the second section when rotating from the first section to the second section with a mathematically negative direction of rotation, ie preferably a clockwise rotation.

The mathematically negative sense of rotation is that direction of rotation of a circular surface that rotates about an axis running perpendicularly through its center and is viewed in the direction of the axis of rotation, with points on the surface that lie above the center describing a movement running to the right. The mathematically negative sense of rotation is preferably the direction of rotation to the right or else clockwise. The mathematically positive sense of rotation is that direction of rotation of a circular surface that rotates about an axis running perpendicularly through its center and is viewed in the direction of the axis of rotation, with points on the surface that lie above the center describing a movement running to the left. The mathematically positive direction of rotation is preferably the direction of rotation to the left or anti-clockwise.

The pivot axis S preferably intersects the transport plane. The pivot axis S preferably has an opening angle with respect to the transport plane, preferably in the case of a rotation from the transport plane to the pivot axis S with a mathematically negative direction of rotation, ie preferably a clockwise rotation. The opening angle of the pivot axis S of the pivot roller 08 to the transport plane is preferably at least 40° (forty degrees), preferably at least 50° (fifty degrees), more preferably at least 60° (sixty degrees), more preferably at least 70° (seventy degrees), for example at least 75° (seventy-five degrees), and/or at most 140° (one hundred and forty degrees), preferably at most 130° (one hundred and thirty degrees), more preferably at most 120° (one hundred and twenty degrees), more preferably at most 110° (one hundred and ten degrees), for example maximum 105° (one hundred and five degrees). The pivot axis S is preferably at an angle to the direction of movement of the at least one conveyor belt 04 entering the pivot roller 08. The at least one incoming conveyor belt 04 is preferably that section of the at least one conveyor belt 04 which is arranged in front of the pivoting roller 08 in the direction of movement of the at least one conveyor belt 04, in particular directly in front of it. Pivot axis S of pivot roller 08 preferably has an angle of at least 0° (zero degrees) relative to the direction of movement of the at least one conveyor belt 04 entering pivot roller 08 ) and/or at most 20° (twenty degrees), preferably at most 15° (fifteen degrees), more preferably at most 10° (ten degrees), more preferably at most 5° (five degrees). Preferably alternatively or additionally, the pivot axis S of the pivot roller 08 has an angle of at least 0 to the direction of movement of the at least one conveyor belt 04 entering the pivot roller 08 ° (zero degrees) and/or a maximum of 20° (twenty degrees), preferably a maximum of 15° (fifteen degrees), more preferably a maximum of 10° (ten degrees), more preferably a maximum of 5° (five degrees). More preferably, the angle is 0° (zero degrees). Pivot axis S of pivot roller 08 is more preferably arranged parallel to the direction of movement of the at least one incoming conveyor belt 04. The at least one conveyor belt 04 preferably runs parallel to the pivot axis S of the pivoting roller 08 on the pivoting roller 08.

Pivoting axis S preferably points to a straight line which touches pivoting roller 08 at a position on the lateral surface, at which position the at least one conveyor belt 04 first comes into physical contact with pivoting roller 08, and which further ones are arranged upstream of pivoting roller 08 and are configured in particular as tension rollers 09 Belt roller 09 or one that is directly upstream of the swivel roller 08 pressure element at a position whose lateral surface touches, at which position the at least one conveyor belt 04 is last in contact with tension roller 09 or the pressure element, an angle of at least 0°

(zero degrees) and/or a maximum of 20° (twenty degrees), preferably a maximum of 15° (fifteen degrees), more preferably a maximum of 10° (ten degrees), more preferably a maximum of 5° (five degrees). More preferably, the pivot axis S is parallel to this straight line.

Preferably, the at least one pivoting roller 08, preferably the one pivoting roller 08 per conveyor belt 04, is mounted in at least one carrier, in particular a carrier designed as a fork carrier 21, preferably on its end faces. The at least one carrier preferably has the pivot axis S. The at least one pivoting roller 08 is preferably arranged with the at least one carrier so that it can pivot and/or pivot about the pivot axis S. The at least one pivoting roller 08, preferably the at least one carrier with pivoting roller 08, preferably has a low mass inertia. The at least one pivoting roller 08, preferably the at least one carrier with the pivoting roller 08, is preferably mounted around the pivot axis S with no play and/or with ease. Thus, preferably even a small deviation of the at least one conveyor belt 04 from its central tracking can be compensated for and/or is compensated for.

Preferably, the at least one conveyor belt 04 has the respective belt roller 06; 07; 08; 09 has a wrap angle. The angle of wrap preferably specifies the contact area between the at least one conveyor belt 04 and the respective belt roller 06; 07; 08; 09 on The at least one conveyor belt 04 preferably wraps around pivoting roller 08 at the angle of wrap. The angle of wrap of the at least one conveyor belt 04 around the pivoting roller 08 is preferably no more than 120°, preferably no more than 105°, more preferably no more than 95°, and/or at least 60°, preferably at least 75°, more preferably at least 85°. This wrap angle is more preferably 90°. The angle of wrap of the at least one conveyor belt 04 around the tensioning roller 09, which is arranged upstream of the pivoting roller 08, is preferably no more than 120°, preferably no more than 105°, more preferably no more than 95°, and/or at least 60°, preferably at least 75°, more preferably at least 85°. More preferably, this wrap angle is 90°.

For example, at least one belt roller 06; 07; 08; 09, preferably at least one of the other belt rollers 08; 09, more preferably at least the at least one pivoting roller 08, grooves and/or microgrooves in the direction of rotation of the belt roller 06;

07; 08; 09 on. Preferably to prevent the at least one conveyor belt 04 from running off the respective belt roller 06; 07; 08; 09, the grooves and/or microgrooves preferably go symmetrically from the center of the belt roller 06; 07; 08; 09, preferably along the axis of rotation R, to their end faces. Angular momentum, also known as twist, acts preferentially toward the center of belt roller 06; 07; 08; 09, i.e. towards the point along the axis of rotation R halfway down the roller body.

At least one tensioning device is preferably provided for tensioning the at least one conveyor belt 04. The at least one tensioning device for tensioning the at least one conveyor belt 04 is preferably provided outside, in particular below or above, the transport plane. The at least one tensioning device preferably has the at least one swivel roller 08. The at least one tensioning device preferably has the at least one pivoting roller 08 and the at least one tensioning roller 09. The respective additional belt roller 08; 09 to change the tension of the at least one conveyor belt 04 in relation to this, preferably in relation to the conveyor belt 04, can be shifted or shifted and/or can be fixed or fixed in the shifted position. Preferably without additional belt rollers 08; 09 between them is preferably the pivoting roller 08, the at least one further belt roller 09, which is preferably cylindrical and is designed as a tensioning roller 09 upstream, which is preferably designed as an incoming roller of the clamping device. Pivoting roller 08 is preferably designed as the outgoing roller, in particular the deflection roller, of the tensioning device. The at least one conveyor belt 04 is preferably tensioned by the at least one tensioning device for tensioning the at least one conveyor belt 04. The at least one clamping device is preferably configured to set and/or control the clamping force against the at least one conveyor belt 04 pneumatically, preferably by means of at least one pneumatic cylinder. The clamping force of the at least one clamping device against the at least one conveyor belt 04 is preferably set and/or controlled pneumatically. The tension of the at least one conveyor belt 04 is preferably set by the relative distance between the at least one pivoting roller 08 and the at least one tensioning roller 09.

The at least one tensioning device has, for example, at least one energy accumulator, in particular a spring system 24, the spring force of which is preferably adjustable and/or is set. The at least one energy accumulator preferably tensions one of the other belt rollers 08; 09 preferably resiliently against the at least one conveyor belt 04. Preferably in addition to or as an alternative to the spring system 24, the at least one energy accumulator is designed as a tensioning system with at least one tensioning device. The at least one clamping means is preferably at least one rocker arm 22. Preferably additionally or alternatively, the at least one clamping system has at least one linear guide 23, preferably at least one parallel guide 23, more preferably at least one linear guide 23 for guiding at least one bearing element, more preferably at least one linear guide 23 Guide at least one element for fixing on. The at least one clamping means is preferably the at least one bearing element, preferably the at least one element for fixing. The at least one belt roller 08; 09, preferably the at least one tensioning roller 09, by means of the at least one bearing element, preferably by means of the at least one element for Fixing, arranged on the at least one linear guide 23, preferably attached. The at least one tensioning device thus preferably has at least one spring system 24 or at least one rocker arm 22 or at least one linear guide 23 . The at least one conveyor belt 04 is preferably activated by the at least one spring system 24 or by the at least one rocker arm 22 or by the position of the at least one additional belt roller 08; 09, preferably the at least one tensioning roller 09, along the at least one linear guide 23. For example, the force accumulator, in particular its at least one spring or its at least one clamping means, is and/or can be controlled pneumatically. The tensioning force of the energy store against the at least one conveyor belt 04 is preferably adjusted pneumatically, preferably by means of at least one pneumatic cylinder. A force regulation is preferably present here. The tension of the at least one conveyor belt 04 is advantageously adjusted evenly, in particular during operation. This advantageously reduces the wear on the at least one conveyor belt 04.

In a preferred first embodiment, the at least one energy accumulator is designed to act on the at least one pivoting roller 08. The at least one energy storage device preferably tensions the at least one pivoting roller 08 against the at least one conveyor belt 04. The energy storage device is embodied as a spring system 24, for example. The spring system 24 preferably acts on the at least one carrier of the at least one pivoting roller 08, which preferably transmits the clamping force to the at least one pivoting roller 08. For this purpose, the at least one carrier preferably has at least one bearing, about which it is arranged to pivot.

In a preferred second embodiment, the at least one energy accumulator is designed to act on the at least one tensioning roller 09. The at least one energy store preferably tensions the at least one tensioning roller 09 against the at least one conveyor belt 04. The at least one tensioning roller 09 is preferably mounted in at least one rocker arm 22, which acts as a tensioning means. The at least one rocker arm 22 tensions the at least one tensioning roller 09, preferably pneumatically, against the at least one conveyor belt 04.

In a preferred third embodiment, the at least one energy accumulator is designed to act on the at least one tensioning roller 09. The at least one energy store preferably tensions the at least one tensioning roller 09 against the at least one conveyor belt 04. For example, the at least one additional belt roller 08; 09, preferably the at least one tensioning roller 09, the at least one linear guide 23, preferably parallel guide 23. The at least one tensioning roller 09 preferably has the at least one linear guide 23. The position of the at least one additional belt roller 08; 09, preferably the at least one tensioning roller 09, adjustable along the linear guide 23, preferably pneumatically adjustable. The position of the at least one additional belt roller 08; 09, preferably the at least one tensioning roller 09, can be fixed along the linear guide 23 by means of the at least one tensioning means embodied as a bearing element, preferably by means of the at least one tensioning means embodied as an element for fixing. The at least one bearing element, preferably the at least one element for fixing, is preferably adjustable along the at least one linear guide 23 . The at least one bearing element, preferably the at least one element for fixing, can preferably be fixed and released at its position along the at least one linear guide 23, in particular in a position that clamps the at least one conveyor belt 04. The at least one tensioning roller 09 is preferably tensioned pneumatically against the at least one conveyor belt 04 due to its position along the at least one linear guide 23.

It is possible to combine different embodiments of the clamping device with one another. For example, both on the pivot roller 08 and on the At least one energy store, preferably at least one tensioning system or spring system 24, can be provided for tensioning roller 09. Or, for example, at least two different clamping devices are provided on the at least one clamping roller 09. Such combinations are then preferably assigned to at least two of the embodiments of the clamping device.

The at least one conveyor belt 04 of the sheet processing machine is preferably guided in a straight line. The at least one conveyor belt 04 is preferably guided around the at least one belt roller 06 embodied as an infeed roller 06 and the at least one belt roller 07 embodied as a deflection roller 07. The at least one infeed roller 06 and the at least one deflection roller 07 define the plane of transport for sheets. The at least one conveyor belt 04 is preferably wrapped around the at least two other belt rollers 08; 09 of the transport unit 02, preferably around the at least one pivoting roller 08 and/or around the at least one tensioning roller 09, outside the transport plane. The at least one conveyor belt 04 is preferably guided over the preferably cylindrical pivoting roller 08. The at least one other belt roller 08 configured as a pivoting roller 08 preferably pivots about the pivoting axis S. The pivoting axis S of the pivoting roller 08 is preferably an axis normal to the axis of rotation R of the pivoting roller 08. The at least one conveyor belt 04 is more preferably over the at least one preferably cylindrical infeed roller 06 and the at least one preferably cylindrical deflection roller 07 and the at least one preferably cylindrical pivoting roller 08 and the at least one preferably cylindrical tensioning roller 09. For example, as an alternative to the cylindrical design of all belt rollers 06; 07; 08; 09, the at least one conveyor belt 04 is conveyed via at least one crowned or conical belt roller 06; 07; 09 of the belt rollers 06; 07; 08; 09 out, which belt roller 06; 07; 09 is different from the pivoting roller 08, for example the crowned or conical deflection roller 07. For example, the at least one conveyor belt 04 via the at least one cylindrical infeed roller 06 and the at least one crowned or conical deflection roller 07 and the at least one cylindrical pivoting roller 08 and the at least one cylindrical tensioning roller 09.

Preferably, the at least one pivoting roller 08 pivots about the pivoting axis S, which is located along the axis of rotation R of the pivoting roller 08 within the path of the at least one conveyor belt 04 between the first end face and the second end face of the pivoting roller 08, preferably in the middle of the path Pivoting roller 08 about the pivoting axis S, which is arranged along the axis of rotation R of the pivoting roller 08 in the middle between the first end face and the second end face of the pivoting roller 08.

The at least one pivoting roller 08 preferably pivots automatically about the pivot axis S, i.e. preferably without an additional drive, in particular in addition to the movement of the at least one conveyor belt 04. The automatic pivoting preferably describes that the at least one pivoting roller 08 is preferably pivoted exclusively by the belt tension of the at least one conveyor belt 04 is pivoted about the pivot axis S, in particular during its movement in the direction of movement.

In the case of a crowned and/or conical roller, the at least one conveyor belt 04 preferably runs on the side with the greatest elongation. In the case of cylindrical rollers, the at least one conveyor belt 04 preferably runs on the side with the least stretch, i.e. on the side where it hits the roller first. Especially with cylindrical belt rollers 06; 07; 08; 09, the at least one conveyor belt 04 thus leaves its central track in the event of uneven expansion and runs laterally, i.e. in the direction of an end face of the respective belt roller 06; 07; 08; 09 Preferably, the at least one pivoting roller 08, preferably the one pivoting roller 08 per conveyor belt 04, causes the at least one conveyor belt 04 to run off the at least one belt roller 06; 07; 08; 09, preferably from the pivoting roller 08, has an opposite effect. The at least one conveyor belt 04 is preferably returned to the central, i.e. on-track, preferably symmetrical position. In this case, the central position is preferably the position that corresponds to the optimal travel path of the conveyor belt 04, preferably its track. The at least one conveyor belt 04 is preferably guided by the pivoting of the at least one pivoting roller 08 towards the center of the travel path of the conveyor belt 04, preferably towards the center between the first end face and the second end face of the pivoting roller 08. The travel path of the conveyor belt 04 preferably runs centrally between the first end face and the second end face of the at least one pivoting roller 08. The rotation of the at least one pivoting roller 08 about its axis of rotation R and/or the pivoting of the at least one pivoting roller 08 about its pivoting axis S is preferred driven exclusively by the movement of the at least one conveyor belt 04.

External influences on the at least one conveyor belt 04 are, in particular, uneven expansion of the at least one conveyor belt 04 and/or the quality of the at least one conveyor belt 04 and/or the homogeneity of the at least one conveyor belt 04 and/or asymmetric loads on the at least one conveyor belt 04, for example by overlying brushes or pressing means, and/or the alignment of the belt rollers 06 guiding the at least one conveyor belt 04; 07; 08; 09, in particular deviations of the axis normal from a direction of movement of the at least one conveyor belt 04 and/or axis parallelism of the belt rollers 06; 07; 08; 09. For example, a sheet lying on the at least one conveyor belt 04 exerts an external influence on the conveyor belt 04. For example, if at least two in the axial direction conveyor belts 04 arranged next to one another transport the sheet, the sheet whose center of mass is arranged closer to a first of the at least two conveyor belts 04 than to a second conveyor belt 04 pulls at least one of the conveyor belts 04 out of its tracked guidance.

Due to external influences, for example, the at least one conveyor belt 04 runs along the lateral surface to the side of the first end face of pivoting roller 08, for example to the left end face in a plan view. The area of the lateral surface of pivoting roller 08 that faces the first end face, i.e., for example, the left-hand area of pivoting roller 08, is therefore subjected to a greater load due to the tensioned at least one conveyor belt 04 than the area of the lateral surface that faces the second end face, i.e. in the example the right pane. Due to the heavier load on the lateral surface in the area facing the first end face, i.e. the left area in the example, swivel roller 08 pivots about pivot axis S, so that the area of the lateral surface which faces the second end face, i.e. the right area for example, comes first comes into contact with the at least one conveyor belt 04. Pivoting roller 08 preferably pivots counter to the direction of movement of the at least one conveyor belt 04 exiting pivoting roller 08. The at least one conveyor belt 04 preferably runs onto that side of pivoting roller 08 that the at least one conveyor belt 04 first encounters. Thus, in the example, the at least one conveyor belt 04 runs to the area of the lateral surface that faces the second end face, i.e. to the right, for example. The at least one conveyor belt 04 is thus preferably returned from its position in the area of the lateral surface, which faces the first end face, to a central position. Pivoting roller 08 preferably pivots counter to its previous pivoting movement the further the at least one conveyor belt 04 runs towards the center and the more balanced the pivoting roller 08 is in the left and right-hand areas of the lateral surface, for example, i.e. preferably the more symmetrically it is loaded. If the at least one conveyor belt 04 runs to the second end face as a result of external influences, pivoting roller 08 pivots so that the at least one conveyor belt 04 first strikes the area of the lateral surface facing the first end face.

List of reference symbols 01 investors

02 transport unit, belt table

03 sheet separator

04 conveyor belt

05 -

06 belt roller, infeed roller

07 belt roller, deflection roller

08 Another belt roller, swivel roller

09 Another belt roller, tension roller

16 Second drive

17 Third Drive

18 Fifth Drive

19 -

20

21 fork carriage

22 rocker arms

23 linear guide, parallel guide

24 spring system

R axis of rotation (06; 07; 08; 09)

S swivel axis (08)

T transport direction

Claims

Expectations

1. Sheet processing machine with at least one transport unit (02) for transporting sheets, wherein the at least one transport unit (02) has at least one belt roller (06) designed as an infeed roller (06) and at least one belt roller (07) designed as a deflection roller (07). which define a transport plane for sheets, with at least two additional belt rollers (08; 09) of the transport unit (02) being arranged outside the transport plane, with at least one belt roller (08) of the at least two additional belt rollers (08; 09) being pivoted around a pivot axis (S) pivoting and/or pivotable pivoting roller (08), the pivoting axis (S) of the pivoting roller (08) being an axis normal to the axis of rotation (R) of the pivoting roller (08).

2. Sheet processing machine according to claim 1, characterized in that the pivot axis (S) of the pivot roller (08) along a rotational axis (R) of the pivot roller (08) within a travel path of at least one conveyor belt (04) between a first end face and a second end face the swivel roller (08) is arranged.

3. Sheet processing machine according to claim 1 or 2, characterized in that the at least one pivot roller (08) is designed to pivot automatically about the pivot axis (S).

4. Sheet-processing machine according to claim 1 or 2 or 3, characterized in that the at least one pivoting roller (08) is cylindrical.

5. Sheet processing machine according to claim 1 or 2 or 3 or 4, characterized characterized in that a transport direction (T) of sheets and a direction perpendicular thereto span a projection plane, in that in the projection plane a first distance between an axis of rotation (R) of the at least one infeed roller (06) and an axis of rotation (R) of the at least one deflection roller ( 07) has an opening angle to a second section between the axis of rotation (R) of the at least one infeed roller (06) and the axis of rotation (R) of the pivoting roller (08) such that the opening angle is a maximum of 45° (forty-five degrees).

6. Sheet processing machine according to Claim 1 or 2 or 3 or 4 or 5, characterized in that an opening angle of the pivot axis (S) of the pivot roller (08) to the transport plane is at least 40° (forty degrees) and at most 140° (one hundred and forty degrees) having.

7. Sheet processing machine according to Claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that the at least one transport unit (02) has at least one circulating transport belt (04).

8. The sheet processing machine according to claim 7, characterized in that the at least one conveyor belt (04) is designed to run around at least the at least one infeed roller (06) and the at least one deflection roller (07) and the at least one swivel roller (08).

9. Sheet processing machine according to Claim 7 or 8, characterized in that the pivot axis (S) of the pivot roller (08) is pivoted relative to a direction of movement of the at least one conveyor belt (04) entering the pivot roller (08) starting from the direction of movement to the pivot axis ( S) has an angle of at least 0° (zero degrees) and/or a maximum of 20° (twenty degrees) in a mathematically negative direction of rotation or that the Pivoting axis (S) of the pivoting roller (08) to the direction of movement of the at least one conveyor belt (04) entering the pivoting roller (08) pivoted from the direction of movement to the pivoting axis (S) in a mathematically positive direction of rotation at an angle of at least 0° (zero degrees) and/or a maximum of 20° (twenty degrees).

10. Sheet processing machine according to Claim 7 or 8 or 9, characterized in that the pivot axis (S) of the pivot roller (08) is arranged parallel to the direction of movement of the at least one incoming conveyor belt (04).

11. Sheet processing machine according to claim 7 or 8 or 9 or 10, characterized in that an angle of wrap of the at least one conveyor belt (04) around the pivot roller (08) is at most 120° and/or at least 60°.

12. Sheet processing machine according to Claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11, characterized in that at least one belt roller (09) of the at least two other belt rollers (08; 09) acts as a tension roller (09) which differs from the further belt roller (08) designed as a pivoting roller (08), and is arranged upstream of the pivoting roller (08) in the direction of movement of the at least one conveyor belt (04).

13. Sheet processing machine according to claim 7 or 8 or 9 or 10 or 11 or 12, characterized in that the at least one conveyor belt (04) is designed as a suction belt.

14. Sheet processing machine according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13, characterized in that at least one belt roller (06; 07; 08; 09) of the belt rollers (06; 07; 08; 09) has grooves and/or microgrooves in the direction of rotation of the Belt roller (06; 07; 08; 09) has that the grooves and/or microgrooves emanate symmetrically from the center of the belt roller (06; 07; 08; 09) to its end faces.

15. Sheet processing machine according to Claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14, characterized in that at least one belt roller (06; 07; 08; 09) of the belt rollers (06; 07; 08; 09) each have a first end face and a second end face and at least one lateral surface, so that the axis of rotation (R) of the at least one belt roller (06; 07; 08; 09) extends from the first end face to the second face is directed.

16. Sheet processing machine according to Claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15, characterized in that the at least one infeed roller (06) and/or the at least one deflection roller (07) and/or the at least one tensioning roller (09) are cylindrical.

17. Sheet processing machine according to Claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16, characterized in that at least one belt roller (06; 07; 09) of the belt rollers (06; 07; 08; 09), which differs from the pivoting roller (08), is crowned or conical.

18. Sheet processing machine according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17, characterized in that the at least one deflection roller (07 ) crowned or is conical.

19. Sheet processing machine according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18, characterized in that at least one belt roller ( 06; 07; 09) of the belt rollers (06; 07; 08; 09), which is different from the swiveling roller (08), has a drive for driving the at least one conveyor belt (04).

20. Sheet-processing machine according to claim 19, characterized in that the belt roller (06; 07; 09) having the drive for driving the at least one conveyor belt (04) is cylindrical.

21. Sheet-processing machine according to Claim 19 or 20, characterized in that the at least one belt roller (06) designed as an infeed roller (06), which is arranged along a sheet transport path as the first belt roller (06) of the belt rollers (06; 07), which has at least one drive.

22. Sheet-processing machine according to Claim 19 or 20, characterized in that the at least one belt roller (07) designed as a deflection roller (07), which is arranged along the sheet transport path as the last belt roller (07) of the belt rollers (06; 07), which has at least one drive.

23. Sheet-processing machine according to claim 19 or 20, characterized in that at least one further belt roller (09) designed as a tensioning roller (09) has the at least one drive.

24. Sheet processing machine according to claim 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23, characterized in that at least one tensioning device for tensioning the at least one conveyor belt (04) is provided outside the transport plane.

25. Sheet processing machine according to Claim 24 in conjunction with Claim 12, characterized in that the at least one tensioning roller (09) is designed as the incoming roller of the at least one tensioning device for tensioning the at least one conveyor belt (04), that the at least one pivoting roller (08 ) is provided as the outgoing roller of the at least one clamping device.

26. Sheet processing machine according to claim 24 or 25, characterized in that the at least one clamping device has at least one energy storage device.

27. Sheet-processing machine according to claim 24 or 25 or 26, characterized in that the at least one tensioning device is designed to adjust and/or control the tensioning force against the at least one conveyor belt (04) pneumatically.

28. Sheet processing machine according to claim 24 or 25 or 26 or 27, characterized in that the at least one clamping device has at least one spring system (24) or at least one rocker arm (22) or at least one linear guide (23).

29. Sheet processing machine according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23 or 24 or 25 or 26 or 27 or 28, characterized in that the at least one transport unit (02) has at least two circulating conveyor belts (04), in that each of the at least two circulating conveyor belts (04) is assigned a swiveling roller (08).

30. Sheet processing machine according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23 or 24 or 25 or 26 or 27 or 28 or 29, characterized in that the at least one transport unit (02) is designed as a belt table (02).

31. Sheet processing machine according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23 or 24 or 25 or 26 or 27 or 28 or 29 or 30, characterized in that the at least one transport unit (02) is followed by a feed table with front lays and/or at least one processing unit of the sheet processing machine.

32. Sheet processing machine according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23 or 24 or 25 or 26 or 27 or 28 or 29 or 30 or 31, characterized in that both an initial position and at least one pivoted position of the at least one pivoting roller (08) are arranged within a plane perpendicular to the pivot axis (S). .

33. A method for guiding at least one conveyor belt (04) of a sheet-processing machine on a track, wherein the at least one conveyor belt (04) is wound around at least one belt roller (06) designed as an infeed roller (06) and at least one belt roller (07) designed as a deflection roller (07). to be led, wherein the at least one infeed roller (06) and the at least one deflection roller (07) define a transport plane for sheets, with the at least one conveyor belt (04) being guided around at least two further belt rollers (08; 09) of the transport unit (02) outside of the transport plane , wherein at least one belt roller (08) designed as a pivoting roller (08) of the at least two other belt rollers (08; 09) pivots about a pivoting axis (S), the pivoting axis (S) of the pivoting roller (08) being an axis normal to the axis of rotation (R) the swivel roller (08).

34. The method according to claim 33, characterized in that the pivoting roller (08) rotates along an axis of rotation (R) of the pivoting roller (08) within the travel path of the at least one conveyor belt (04) between a first end face and a second end face of the pivoting roller ( 08) arranged pivot axis (S) pivots.

35. The method according to claim 33 or 34, characterized in that the at least one pivoting roller (08) pivots automatically about the pivot axis (S).

36. The method according to claim 35, characterized in that the at least one pivoting roller (08) is pivoted about the pivot axis (S) by a belt tension of the at least one conveyor belt (04).

37. The method according to claim 33 or 34 or 35 or 36, characterized in that a transport direction (T) of sheets and a direction perpendicular thereto span a projection plane, so that in the projection plane a first distance between a rotational axis (R) of the at least one infeed roller (06) and an axis of rotation (R) of the at least one deflection roller (07) to a second distance between the axis of rotation (R) of the at least one infeed roller (06) and the axis of rotation (R) of the pivoting roller (08) has an opening angle such that the opening angle is a maximum of 45° (forty-five degrees).

38. The method according to claim 33 or 34 or 35 or 36 or 37, characterized in that an opening angle of the pivoting axis (S) of the pivoting roller (08) to the transport plane is at least 40° (forty degrees) and at most 140° (one hundred and forty degrees). .

39. The method according to claim 33 or 34 or 35 or 36 or 37 or 38, characterized in that the at least one conveyor belt (04) is moved by pivoting the at least one pivoting roller (08) towards the middle of the travel path of the conveyor belt (04) between the first end face and the second end face of the swiveling roller (08).

40. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39, characterized in that the at least one conveyor belt (04) is guided over the at least one cylindrical pivoting roller (08).

41. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39 or 40, characterized in that the pivoting axis (S) of the pivoting roller (08) is aligned with a direction of movement of the at least one conveyor belt ( 04) pivoted from the direction of movement to the pivot axis (S) in a mathematically negative direction of rotation at an angle of at least 0° (zero degrees) and/or a maximum of 20° (twenty degrees) or that the pivot axis (S) of the pivot roller ( 08) to the direction of movement of the at least one conveyor belt (04) entering the pivoting roller (08) pivoted from the direction of movement to the pivot axis (S) in a mathematically positive direction of rotation of at least 0° (zero degrees) and/or of a maximum 20° (twenty degrees).

42. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39 or 40 or 41, characterized in that the at least one conveyor belt (04) has the pivoting roller (08) with an angle of wrap of at most 120° and/or at least 60° wraps around.

43. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39 or 40 or 41 or 42, characterized in that at least one belt roller (09) designed as a tensioning roller (09) of the at least two other belt rollers (08; 09 ), which differs from the further belt roller (08) designed as a pivoting roller (08), is arranged upstream of the pivoting roller (08) in the direction of movement of the at least one conveyor belt (04).

44. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39 or 40 or 41 or 42 or 43, characterized in that sheets to be transported are held by means of suction air on the at least one conveyor belt (04) designed as a suction belt.

45. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39 or 40 or 41 or 42 or 43 or 44, characterized in that at least one belt roller (06; 07; 08; 09) of the belt rollers (06; 07; 08; 09) has grooves and/or microgrooves in the direction of rotation of the belt roller (06; 07; 08; 09), such that an angular momentum acts towards the center of the belt roller (06; 07; 08; 09).

46. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39 or 40 or 41 or 42 or 43 or 44 or 45, characterized in that at least one belt roller (06; 07; 08; 09) of the belt rollers ( 06; 07; 08; 09) each having a first end face and a second end face and at least one lateral surface that the axis of rotation (R) of the at least one Belt roller (06; 07; 08; 09) is directed from the first end face to the second end face.

47. The method according to claim 43 or 44 or 45 or 46, characterized in that the at least one conveyor belt (04) via the at least one cylindrical infeed roller (06) and the at least one cylindrical deflection roller (07) and the at least one cylindrical Pivoting roller (08) and the at least one cylindrical tensioning roller (09) is guided.

48. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39 or 40 or 41 or 42 or 43 or 44 or 45 or 46, characterized in that the at least one conveyor belt (04) has at least one crowned or conical formed belt roller (06; 07; 09) of the belt rollers (06; 07; 08; 09) is guided, which belt roller (06; 07; 09) differs from the pivoting roller (08).

49. The method according to claim 43 or 44 or 45 or 46 or 48, characterized in that the at least one conveyor belt (04) via the at least one cylindrical infeed roller (06) and the at least one crowned or conical deflection roller (07) and the at least one cylindrical pivoting roller (08) and the at least one cylindrical tensioning roller (09) is guided.

50. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39 or 40 or 41 or 42 or 43 or 44 or 45 or 46 or 47 or 48 or 49, characterized in that the at least one conveyor belt (04) is driven by at least one drive arranged on at least one belt roller (06; 07; 09) of the belt rollers (06; 07; 08; 09), which is different from the pivoting roller (08).

51. The method according to claim 50, characterized in that the belt roller (06; 07; 09) having the drive for driving the at least one conveyor belt (04) is cylindrical.

52. The method according to claim 50 or 51, characterized in that the at least one conveyor belt (04) is arranged by the at least one drive on the at least one infeed roller (06), which along a transport path of sheets as the first belt roller (06) of the belt rollers ( 06; 07) is arranged, is driven.

53. The method according to claim 50 or 51, characterized in that the at least one conveyor belt (04) is arranged by the at least one drive on the at least one deflection roller (07) which along the transport path of sheets is the last belt roller (07) of the belt rollers ( 06; 07) is arranged, is driven.

54. The method according to claim 50 or 51, characterized in that the at least one conveyor belt (04) is driven by the at least one drive arranged on at least one other belt roller (09) designed as a tension roller (09).

55. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39 or 40 or 41 or 42 or 43 or 44 or 45 or 46 or 47 or 48 or 49 or 50 or 51 or 52 or 53 or 54, characterized characterized in that the at least one conveyor belt (04) is tensioned by the at least one tensioning device for tensioning the at least one conveyor belt (04).

56. The method according to claim 55 in conjunction with claim 43, characterized in that the at least one tensioning roller (09) as the incoming roller the at least one tensioning device for tensioning the at least one conveyor belt (04) is designed such that the at least one pivoting roller (08) is provided as the outgoing roller of the at least one tensioning device.

57. The method according to claim 55 or 56, characterized in that at least one energy accumulator of the tensioning device tensions one of the other belt rollers (08; 09) against the at least one conveyor belt (04).

58. The method according to claim 55 or 56 or 57, characterized in that the clamping force of the at least one clamping device against the at least one conveyor belt (04) is adjusted and/or controlled pneumatically.

59. The method according to claim 55 or 56 or 57 or 58, characterized in that the at least one conveyor belt (04) is activated by at least one spring system (24) or by at least one rocker arm (22) or by the position of the at least one additional belt roller (08 ; 09) along at least one linear guide (23).

60. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39 or

40 or 41 or 42 or 43 or 44 or 45 or 46 or 47 or 48 or 49 or

50 or 51 or 52 or 53 or 54 or 55 or 56 or 57 or 58 or 59, characterized in that at least one transport unit (02) designed as a belt table (02) has the at least one conveyor belt (04).

61. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39 or

40 or 41 or 42 or 43 or 44 or 45 or 46 or 47 or 48 or 49 or

50 or 51 or 52 or 53 or 54 or 55 or 56 or 57 or 58 or 59 or

60, characterized in that the at least one conveyor belt (04) transports at least one sheet to a feed table with front lays and/or to at least one processing unit of the sheet processing machine.

62. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39 or 40 or 41 or 42 or 43 or 44 or 45 or 46 or 47 or 48 or 49 or 50 or 51 or 52 or 53 or 54 or 55 or 56 or 57 or 58 or 59 or 60 or 61, characterized in that at least two circulating conveyor belts (04) are guided over the belt rollers (06; 07; 08; 09), that each of the at least two circulating conveyor belts (04) is guided over a pivoting roller (08).

63. The method according to claim 33 or 34 or 35 or 36 or 37 or 38 or 39 or 40 or 41 or 42 or 43 or 44 or 45 or 46 or 47 or 48 or 49 or 50 or 51 or 52 or 53 or 54 or 55 or 56 or 57 or 58 or 59 or 60 or 61 or 62, characterized in that both a starting position and at least one pivoted position of the at least one pivoting roller (08) are arranged within a plane perpendicular to the pivot axis (S).