WO2017215934A1

WO2017215934A1 - Apparatus and method for destacking and separating flat material

Info

Publication number: WO2017215934A1
Application number: PCT/EP2017/063300
Authority: WO
Inventors: Peter BRÜCKER; Helmut VAN HEECK; Oliver HEISIG; Johannes LOOK; Stefan Willemsen
Original assignee: Khs Gmbh
Priority date: 2016-06-15
Filing date: 2017-06-01
Publication date: 2017-12-21
Also published as: DE102016110944A1; EP3472081A1; US20200361728A1

Abstract

The invention relates to an apparatus (1) for destacking and separating flat material, to a belt cassette (5) for such an apparatus and to a corresponding method. In order to create an apparatus and a method which provide particularly straightforwardly for adaptation of the apparatus to different formats of flat material, wherein the apparatus should also be particularly straightforward to maintain and, in the event of a defect being found, can be rendered operational again particularly quickly, provision is made for the apparatus to have a drive unit (2), a drive shaft (3), which interacts with the drive unit, and at least one ejecting belt (4), which can be driven via the drive shaft, the ejecting belt being arranged on a modular belt cassette (5).

Description

Device and method for stacking and separating flat material

The invention relates to a device for stacking and separating flat material and a modular exchangeable tape cassette for such a device. Furthermore, the invention relates to a method for individually adjusting a device for stacking and separating flat material.

Apparatuses and methods for stacking and separating flat material are known in various designs from the prior art, for example from US Pat. No. 3,981,494. Corresponding devices and methods are used to remove a single sheet, such as a cardboard sheet or a cardboard blank, from a stack or a magazine. Typically, the known devices and methods find application in the context of the production of packaging material, such as folding cartons, trays or carriers, and in particular to provide individual, prefabricated blanks for subsequent folding or gluing.

In conventional devices of the prior art, a flat trigger is arranged below the flat material to be unstacked, which transports the lowermost piece of the flat material individually by means of a plurality of mutually parallel belts. In this case, the belts are motor-driven by means of a common drive axle and are guided circumferentially by means of at least one second axle. In such a device for stacking typically four to eight such bands are arranged parallel to each other.

However, such a configuration has several disadvantages. Thus, the bands are subject to high wear and must therefore be regularly maintained or replaced in the event of a defect. In particular, the defect or wear of one of the middle bands in the case of an arrangement of more than two bands on an axle typically leads to the fact that a plurality of external bands as well as further components of the apparatus must be disassembled. However, this leads to long downtime of the device during repairs or during maintenance. In addition, in the devices known from the prior art, the position of the individual bands or their distance from each other is immutable adapted to the particular application. As a result, only one predetermined type of flat material, in particular only a defined format of flat material, can be stacked and separated by means of a device. For a format change either a costly conversion or the use of another device is necessary.

Furthermore, from EP 1 591 230 A1 a generic, improved device is known, are arranged in the tape cassette for the withdrawal of flat material slidably on a support and are driven by a common drive shaft. The individual withdrawal bands could be easily changed because they are not pierced by the drive shaft. A disadvantage here is that the individual tape cassettes can not be removed without disassembly of the overall device.

The invention is therefore based on the object to provide a device and a corresponding method which allow in a particularly simple manner, an adaptation of the device to different formats of flat material, the device should continue to be particularly easy to maintain and especially in case of a defect quickly ready for use again.

The object is achieved by a device according to claim 1, a modular exchangeable tape cassette according to claim 12 and a method according to claim 13. Advantageous developments of the invention are specified in the dependent claims.

The device according to the invention for stacking and separating flat material has a drive unit, a drive shaft cooperating with the drive unit, and at least one ejection belt drivable via the drive shaft, wherein the ejection belt is arranged on a tape cassette. The arrangement of each ejection belt on a single tape cassette allows the device according to the invention in a particularly simple manner, the ejector belts individually and separately from each other in the event of a defect or for maintenance. In addition, it is by the modular structure by means of tape cassettes readily possible to vary the number of ejector belts and their position and distance from each other in any way, and thus adapt the existing device to each be unstacked and to be separated flat material. In particular, different formats of flat material can be stacked with such a device.

The modular exchangeable tape cassette according to the invention for a device for stacking and separating flat material has a circumferentially guided ejection belt, a transmission means for transmitting the movement of a drive unit of the device on the ejection belt, in particular by means of a gear, and at least one fixing means for modular replaceable fixing of the tape cassette of the device.

Such an embodiment of the tape cassette according to the invention makes it possible in a particularly simple manner to replace and fix any desired ejection tape on a device for destacking. In addition, in the apparatus, in a particularly simple manner, when format changes of the flat material to be stacked, not only the ejector belts can be individually positioned differently, but also readily the type of one or more ejector belts, in particular with respect to their width, thickness or surface structure to be adapted to individual needs. Finally, the modular design of the tape cartridges allows such as a spare part for quick and easy replacement ready.

The method according to the invention for individually adjusting a device for stacking and separating flat material, in particular for a device according to the invention and / or with a tape cassette according to the invention, comprises firstly aligning at least one drive gear at an axial position of a drive shaft, followed by setting a band - cassette on the device, in particular on at least one, preferably on two receiving rails of the device in such a way that the drive gear cooperates with a transmission gear of the tape cassette for driving an ejection belt.

By means of the method according to the invention, an individual adaptation of the device to an arbitrary format of the flat material can be carried out in a simple manner, wherein, in an especially advantageous manner, any desired stepless adjustment is possible.

Flat material according to the invention is initially basically any stackable material which is substantially flat. Preferably, the flat material is integrally formed. For example, the flat material can be individual pieces of paper, cardboard, wood, metal, plastic or a composite material, wherein preferably the entire flat material to be stacked has the same shape and thickness. The flat material is particularly preferably blanks made of cardboard or paperboard as intermediate or bottom layers, for example for packaging beverage bottles or cans on a pallet, or for producing containers, such as boxes, folding cartons, carriers or trays.

By stacking and separating in the sense of the invention, a process is understood in which an object, in particular a single piece of flat material, is selectively and individually removed from a stack in order to process it further or to supply it to another device. In this case, the destacking can in principle take place from any desired position of the stack, but preferably the individual removal of the pieces or of the flat material takes place from the underside of the stack.

The drive unit according to the invention can in principle be designed in any way such that the drive shaft can be rotated by means of the drive unit. In this case, the drive unit can comprise one or more motors, in particular electric motors, wherein the at least one motor can be arranged both directly on the device. Alternatively, by means of the drive unit of the device, a rotational movement can be transmitted only by a motor arranged outside the device. The drive unit is preferably formed as a motor drive, in particular an electric motor, which is mounted in the device and drives the drive shaft particularly preferably via two interacting toothed wheels. In addition, a countershaft may be provided which connects the motor drive with the drive shaft.

The drive shaft according to the invention is basically rotatably fixed in the device and preferably extends in a spatial direction along at least 80%, more preferably 90% and most preferably completely over the width of the device. Also preferably, the drive shaft is integrally formed and / or has at least one gear for cooperation with the drive unit, in particular a motor drive. Further preferably, the cross section of the drive shaft perpendicular to the central longitudinal axis of a flattened, deviating from a circle shape, wherein a single area may be flattened or the entire circumference of the cross section may have a plurality of flattened portions. Particularly preferably, the drive shaft is formed as a square shaft with a rectangular and particularly preferably with a square cross-section.

The ejection belt is basically a component or an assembly of plastic, rubber, metal and / or a composite material, which is formed as an endless belt, strip, belt, chain or the like. In this case, the ejection belt is basically closed in itself or endlessly formed. Preferably, the ejection belt is integrally formed and / or has a smooth surface on all sides. Particularly preferably, the ejector belt is formed as a flat belt made of an elastic plastic or rubber. Alternatively, the ejection belt can also be formed as a V-belt, wherein the ejection belt ribs on a surface, in particular V-ribs, trapezoidal or cuboidal ribs. A tape cassette according to the invention is an assembly on which a single ejection belt is arranged such that it occurs at least in a section at least on a surface of the tape cassette to come there in contact with flat material and thus to be able to unstack this and singulate. Furthermore, a tape cassette is defined by arranging a single ejection belt on a drive shaft of the device such that the ejection belt can only be operated by the drive shaft and independently of further ejection belts. In this case, there is no functional connection between two ejection belts and preferably there is also an indirect connection only via a common drive shaft.

Preferably, each tape cassette is arranged in the device at right angles to the drive shaft, so that the direction of movement of the ejection belt extends along a direction of rotation of the drive shaft. Accordingly, a modular interchangeable tape cassette is understood to mean a tape cassette which can be removed as a whole from the device while remaining functional and which can again be fixed relative to the device. In this case, the tape cassette is designed in such a way that it can easily be replaced by a corresponding other tape cassette, without the need for a structural modification of the remaining apparatus for destacking and separating flat material.

In particular, the tape cassette can be solved as a complete, unchanged component of the drive thing, because it is connected directly to this and / or the respective arrange there th respective drive wheel via a pinion, gear or a gear. In this case, as an alternative to a transmission, a force-related coupling can also take place via a drive belt or drive chains.

In this case, the at least one drive shaft and any drive wheels arranged thereon are independent of the respective tape cassettes and their fastening and fastening means. This is such that the drive shaft and / or drive wheels arranged thereon are not enclosed, supported or mounted on the tape cassette or one of its associated components, in particular its support structure, bearing plates, etc. In other words, the drive shafts and possibly arranged thereon drive wheels are held and supported independently of the tape cassette.

A transmission means for transmitting the movement of a drive device to the ejection belt is understood to mean a component or an assembly which transmits a rotational movement, in particular the drive shaft, to the ejection belt, wherein the transmission preferably takes place by means of a single gear, which particularly preferably directly implements the rotational movement transmits to a rolling on the ejection belt component. In principle, the fixing means may be a device for the positive and / or non-positive arrangement of the tape cassette on the device. An exclusively cohesive definition, for example by means of gluing or welding is excluded according to the invention. Preferably, the fixing means already enables a form-locking fixing in at least two spatial directions as well as a supplementary frictional fixing, in particular means of at least one, particularly preferably exactly one screw. The term "fixing" is understood to mean the process in which a tape cassette is fixed in place but is detachably fastened to the device. According to an advantageous embodiment of the invention, the at least one tape cassette as assembly is releasably fixed to the device, which in a particularly simple way an exchange is possible without having to dismantle further parts of the device.

In this case, the tape cassette is fixed to the device in particular by means of a reversible locking means, for example a screw, a bolt, a pin, a split pin, a latch or the like, so that it can be repeatedly removed or removed and re-assembled. In this case, a detachable assembly is understood to mean a tape cassette comprising a plurality of components, the components being connected to one another in such a way that the tape cassette does not have to be arranged on the apparatus in order to maintain the functionality and the structural stability. The tape cassette is accordingly also as a separate, separate from the device component shape and / or functional stability. Most preferably, the tape cassette is attachable from above with respect to a Aufstelllage the device, which can cooperate in this position with the drive shaft. In an advantageous embodiment of the invention, at least two, preferably between 1 and 10, more preferably between 3 and 8 and most preferably 7 tape cassettes are so fixed relative to the drive shaft, that the discharge belts of all tape cassettes parallel to each other, whereby the device in a particularly simple manner can be adapted to the format of the flat material to be stacked. In this case, the tape cassettes are particularly preferably arranged to each other such that all ejector belts are arranged in a common plane or at the same height and in particular together form a transport surface of a plurality of ejector belts. Most preferably, all tape cartridges are identical and / or arranged completely parallel to each other on the device. In this case, the tape cassettes are particularly preferably arranged such that the distance between the individual ejection tapes to each other at least 50 mm, preferably at least 100 mm and more preferably at least

105 mm. In a preferred embodiment of the device according to the invention, the at least one tape cassette, in particular all tape cassettes are each positively and / or non-positively fixed to a support structure of the device, thereby in a particularly simple manner correct alignment of the tape cassettes with respect to the entire device and in particular in relation to the drive shaft is guaranteed. Also preferably, the drive shaft is rotatable relative to the support structure, particularly preferably fixed to the support structure. Under a support structure is basically understood a component or group of components that have the main task to specify other components, such as the tape cartridges and the drive shaft. In particular, the support structure is made of frames, supports, profiles or the like made of metal.

According to an advantageous embodiment of the invention, the support structure on two parallel to the drive shaft extending receiving rails on which tape cassettes can be set in any position in the axial direction of the drive shaft NEN, whereby the device is particularly easy to adapt to different formats of the flat material to be unstacked. Preferably, both receiving rails extend parallel to one another and thereby particularly preferably form a bridge. Further preferably, the receiving rails on a over at least 75%, more preferably 90% and most preferably over the entire length extending receiving area for tape cassettes, wherein the receiving area in particular a receiving groove or a receiving slot for receiving a fastener, such as a screw, or a definable Includes fastener. In a preferred embodiment of the invention, the tape cassette on two holding elements, by means of which the tape cassette on the support structure, preferably on each one of the receiving rails can be fixed, whereby in a particularly simple manner a repeatable fixing the tape cassette can be achieved at a fixed position of the device. Preferably, the determination by means of exactly one screw per holding element. In principle, an embodiment of the tape cassette according to the invention with only one holding element is conceivable.

Preferably, however, two holding elements are terminal, ie, in each case arranged on one side of the tape cassette on which the ejection belt is deflected. Under a holding element is basically understood a component which is firmly fixed to the tape cassette, in particular in each case on both bearing plates of a tape cassette, and which has a region which is for positive and / or non-positive fixing to the device, particularly preferably at a receiving meschiene the device and very particularly preferably provided on a receiving rail arranged on the receiving element. The attachment of the retaining element to the tape cassette is preferably carried out by means of screws, in particular by means of two screws per bearing plate. Particularly preferably, each retaining element further comprises a screw opening for fixing the retaining element on the device, the receiving rail or the receiving element.

In an advantageous embodiment of the invention, the retaining element on a receiving rail in any position with respect to the axial direction of the drive shaft fixable receiving element form-fitting and / or non-positively festbar- bar, whereby tape cassettes are arranged in any position along the drive shaft in a simple manner and thereby an adaptation of the device to the respective flat material can be made particularly simple. Preferably, the receiving element is formed in two pieces, wherein a first part of the receiving element can be arranged on a first surface of the receiving rail, while the second part of the receiving element can be particularly preferably arranged on the opposite surface of the receiving rail. Further preferably, both parts of the receiving element are fixable to each other, in particular by means of at least one, preferably two screws screwed together. Most preferably, at least one of the parts of the receiving element penetrates the receiving rail in the region of a receiving slot of the receiving rail, which can extend in particular over the entire length of the receiving rail. Also preferably, the receiving element has a receiving surface, which coincides with the shape of a surface to be arranged on the receiving surface of the holding element or forms a positive or planar support. According to a preferred embodiment of the device according to the invention, a rotation of the drive shaft by means of gears, in particular by means of a drive shaft fixed to the drive gear and a thus engaged transmission gear of the tape cassette for driving the ejection belt is transmitted, which in a simple manner a particularly simple and precise control one or more tape cartridges is possible.

According to a likewise preferred embodiment of the device according to the invention, the tape cassette on a toothed belt pulley for driving the ejection belt, which is rotatably connected to the transmission gear. In this case, the transmission gearwheel is preferably connected directly to the toothed belt pulley for driving the ejection belt, in particular screwed thereto. Alternatively preferably, the transmission gear is rotatably connected to the toothed belt pulley via a common axis. In a preferred embodiment of the invention, the drive gear is axially freely displaceable on the drive shaft and fixed at an arbitrary position of the drive shaft, whereby in a particularly simple manner, the drive shaft with the respective drive gear to an individually desired position of a tape cassette can be adjusted. In this case, the fixing of the drive toothed wheel on the drive shaft takes place in a force-locking manner, in particular in the axial direction. In the circumferential direction or in the direction of rotation of the drive shaft, the fixing can take place both positively, for example by means of one or more screws, or preferably also exclusively or positively, for example by a corresponding, non-circular shape of the cross section of the drive shaft, with an opening of the drive gear corresponds to receiving the drive shaft. Alternatively, a positive connection via a bolt, a pin, a screw or the like can be achieved, which is arranged radially to the drive shaft fixed to this and on the drive gear. In an advantageous development of the invention, the ejection belt is deflected on two opposite sides of the tape cassette by means of a toothed belt pulley and a toothed belt wheel, wherein the toothed belt pulley and the Zahnrie- wheel are respectively fixed on both sides of a respective bearing plate of the tape cassette, whereby a particularly simple and at the same time particularly stable Structure of the tape cassette is achieved and beyond by releasing one of the bearing plates in a particularly simple manner, a change of the ejector belt is possible. Particularly preferably, the bearing plates form the side walls of the tape cassette. Particularly preferably, the toothed belt pulley and / or the toothed belt wheel are mounted, in particular by means of a respective sliding, ball, roller bearing or the like. Further preferably, the holding elements, in particular a front and a rear holding element, fixed to the bearing plates in such a way, in particular screwed that they form the frame or the housing of the tape cassette. In this case, the housing can be open on the remaining sides and / or the ejection band can extend in sections outside the housing.

Preferably, the tape cassette comprises at least one guide element for the ejection belt, which particularly preferably surrounds the ejection belt on all sides. In particular, the guide member is disposed in a region of the tape cassette in which a portion of the ejection tape exits from the tape cassette and runs on the surface thereof to be able to unstack a sheet material. Also preferably, in such a portion of the ejector belt, a support element is provided on which the ejection belt is guided fitting, so that when stacking the Flachmate- as the ejection belt is supported on the opposite side of the sheet. In this case, the support element is particularly preferably fixed relative to the bearing plates, in particular screwed to these.

A preferred embodiment of the device according to the invention has a tension roller holding the discharge belt tension, which rolls particularly preferably from the inside of the tape cassette ago on the discharge belt. Also preferably, the tension roller is fixed by means of a tensioning roller arm on the tape cassette, in particular on one of the bearing plates, wherein very particularly preferably the tensioning roller arm for changing the belt tension against the tape cassette, for example by means of a hexagon screw, is adjustable. Furthermore, the tensioning roller is preferably fixed to the tensioning roller arm.

In a preferred embodiment of the method according to the invention, a receiving element is fastened to the device, preferably to at least one and particularly preferably to each of the two receiving rails of the device for aligning the drive gear, on which subsequently the fixing of the tape cassette takes place, whereby in a particularly simple manner Way the tape cartridges can be arranged repeatable at a respective constant position of the device. An embodiment of the device according to the invention is explained below with reference to the drawings. In the figures show:

1 is a perspective view of an apparatus for stacking and separating of flat material,

2 shows, from three different directions, a view of a plurality of tape cassettes arranged on receiving rails and of a drive shaft of the device illustrated in FIG. 1,

Fig. 3 shows a view from two directions of a tape cassette of the apparatus shown in Fig. 1 and

Fig. 4 is a schematic view of a tape cassette of the apparatus shown in Fig. 1 with only a partial representation of the tape cassette occlusive bearing plate.

In a device 1 shown schematically in FIG. 1 for unstacking and separating cardboard blanks from a magazine, a plurality of tape cassettes 5 are arranged parallel to one another on a support structure 6. Furthermore, a drive shaft 3 is rotatably fixed to the support structure 6, which is driven by gears of a countershaft 20 comprehensive drive unit 2. Also, the transmission of the rotation of the drive shaft 3 on the tape cassettes 5 takes place in each case by means of a drive shaft 3 rotatably fixed to the drive gear 1 first At each of the tape cassettes 5, a discharge belt 4 made of rubber is arranged circumferentially such that the discharge belt 4 can detect and transport a lowermost carton blank located in the magazine from the underside.

The fixing of the tape cassettes 5 takes place on two receiving rails 7a, b of the support structure 6, wherein the tape cassette 5 for this purpose on two opposite sides in each case a holding element 8, 9, which on both sides of each ner, the lateral housing of the tape cassette 5 forming Bearing plate 15a, b is screwed with two screws (see Fig. 3a). The respective holding element 8, 9 is screwed to the device 1 with a screw per holding element 8, 9 by means of a receiving element 10 fixed to the receiving rails 7a, b. Each of the receiving elements 10 is formed in two pieces, wherein the two parts of the receiving element 10 on opposite sides of the receiving rail 7a, b are arranged (see Fig. 2a, 2c and 3a).

The transmission of the rotation of the drive shaft 3 non-rotatably connected to the drive gear 1 1 on the ejection belt 4 by means of a transmission gear 12 which cooperates with the drive gear 1 1 and rotationally fixed to the ejector belt 4 driving toothed belt pulley 13 is connected (see Fig. 2b and 3b). In this case, the toothed belt pulley 13 deflects the ejection belt 4 on one side of the tape cassette 5, while the ejection belt 4 is guided circumferentially on the opposite side of the tape cassette 5 by a toothed belt wheel 14 (see FIG. 3b).

In this case, the toothed belt pulley 13 is arranged on the side of the tape cassette 5, to which the ejection belt 4 is added and in the direction of a flat piece is transported for stacking and separating. A portion of the ejection belt 4 extends to outside of the tape cassette 5, that is, above an upper edge of the housing forming bearing plates 15a, b (see Fig. 3a and 4). The section of the ejection strip 4 stacking the flat material is supported on the side facing away from the material to be stacked and facing the inside of the tape cassette 5 by a support element 19, so that the ejection belt 5 can absorb pressure from the material to be unstacked without its position in the direction of Inside the tape cassette 5 to change (see Fig. 3a and 3b).

To maintain and adjust the tension of the ejection belt 4, this is performed not only on the toothed belt pulley 13 and the toothed belt wheel 14, but also by a tensioning roller 16, wherein the tensioning roller 16 is mounted on a relative to the bearing plates 15a, b pivoting tension roller arm 17. In this case, the pivotable arrangement of the tension roller arm 17 in the region of an axis for rotatably fixing the Zanhriemenrades 14 takes place on the bearing plates 15a, b. To adjust the position of the tension roller arm 17, a tensioning screw 18 is fixed to the tape cassette 5, which abuts the tensioning roller arm 17 at one end such that actuation of the tensioning screw 18 results in a movement of the tensioning roller arm 17 in the direction of the ejection belt 4 (see FIG. 4).

LIST OF REFERENCE NUMBERS

1 Device for destacking and separating of flat material

2 drive unit

3 drive shaft

4 ejection belt

5 tape cartridge

6 supporting structure

7a, b receiving rails

8 front retaining element

9 rear retaining element

10 receiving element

1 1 drive gear

12 transmission gear

13 toothed belt pulley

14 toothed belt wheel

15a, b bearing plate

16 tension roller

17 tensioner arm

18 clamping screw

19 support element

20 countershaft

Claims

Patent claims

1 . Device (1) for stacking and separating flat material, comprising

- a drive unit (2),

- a drive shaft (3) which interacts with the drive unit (2) and

- at least one ejection belt (4) that can be driven via the drive shaft (3), the ejection belt (4) being arranged on a tape cassette (5), characterized in that

the drive shaft (3) is not enclosed or supported by the tape cassette (5) and/or one of its associated components, so that the tape cassette (5) is detachably secured as an assembly to the device (1), the tape cassette (5) being secured by means of at least one reversible locking means is fixed to the device in such a way that it can be repeatedly removed or detached and reassembled.

2. Device according to claim 1, characterized in that at least two, preferably between 1 and 10, tape cassettes (5) can be fixed relative to the drive shaft (3) in such a way that the ejection belts (4) of all tape cassettes (5) run parallel to one another.

3. Device according to at least one of the preceding claims, characterized in that the at least one tape cassette (5) is fixed in a form-fitting and / or non-positive manner relative to a support structure (6) of the device (1).

Device according to at least one of the preceding claims, characterized in that the support structure (6) has two receiving rails (7a, b) running parallel to the drive shaft (3), on which tape cassettes (5) can be placed in any position in the axial direction of the drive shaft (3). can be determined.

Device according to at least one of the preceding claims, characterized in that the tape cassette (5) has two holding elements (8, 9) by means of which the tape cassette (5) is attached to the support structure (6), preferably to one of the receiving rails (7a, b ) can be determined.

Device according to at least one of the preceding claims, characterized in that the holding element (8, 9) can be fixed to a receiving element (10a, b) on the receiving rail (7a, b) in any position in relation to the axial direction of the drive shaft (3). can be fixed positively and/or non-positively.

Device according to at least one of the preceding claims, characterized in that a rotation of the drive shaft (3) by means of gears, in particular by means of a drive gear (1 1) which can be fixed to the drive shaft (3) and a transmission gear (12) of the tape cassette (12) which is in engagement therewith ( 5) is transferred to drive the ejection belt (4).

Device according to at least one of the preceding claims, characterized in that the drive gear (1 1) is axially freely displaceable on the drive shaft (3) and can be fixed at any position on the drive shaft (3).

9. Device according to at least one of the preceding claims, characterized in that the tape cassette (5) has a toothed belt pulley (13) for driving the ejection belt (4), which is connected in a rotationally fixed manner to the transmission gear (12).

10. Device according to at least one of the preceding claims, characterized in that the ejection belt (4) is deflected on two opposite sides of the tape cassette (5) by means of a toothed belt pulley (13) and a toothed belt wheel (14), each of which is attached to a bearing plate on both sides (15a, b) of the tape cassette (5) are fixed.

1 1 . Method for individually adjusting a device for stacking and separating flat material, using the device according to at least one of the preceding claims, with the steps:

- Aligning at least one drive gear (1 1) at an axial position of a drive shaft (3) and

- Fixing a tape cassette (5) on the device (1), in particular on two receiving rails (7a, b) of the device (1) in such a way that the drive gear (1 1) is connected to a transmission gear (12) for driving an ejection belt (4). the tape cassette (5) interacts.

12. The method according to claim 1 1, characterized in that a receiving element (10a, b) is attached to the device (1), in particular on each of the two receiving rails (7a, b) for aligning the drive gear (1 1). which subsequently determines the tape cassette (5).