EP1251093A2 - Device for delivering piles of folding boxes - Google Patents

Abstract

A device for stacking folding box hoses (3) has a height-adjustable lifting table (19). First temporary support means (25, 26) are located above the lifting table, which can be pulled out of the stacking shaft (12) or pushed into this. Another set of temporary support means (28) can be pulled out of the stacking shaft as well as moved downwards in the stacking shaft (12). The second support means (28) simultaneously serve to compress a finished stack in order to be able to thread it between a transport device (42) and a hold-down device (45). While the lifting table (19), together with the second support device (28), is busy removing the stack, the first temporary support means (25, 26) ensure that the stacking shaft (12) can still be stacked without interruption.

Description

From DE 695 00 305 a device is known to from a stream of incoming folding box hoses Generate small batches. The products come in solid time grid. The distance between successive Products defines the maximum break within that Switch device for stacking to the next stack got to. The device must be at very high speed work uninterruptedly so that they are able is to accept the products without any repercussions to create the previous folding machine.

The mechanical parts of the stacking device must work at very high speeds. To the speeds reasonably within tolerable limits hold, two stacks are formed one above the other by temporary supports are separated. Thereby is gained time to get a finished stack out of the To be able to remove the stacking device.

The maximum speed at which the stack moves due to the frictional connection between the stacked products. Would the stack is accelerated and braked too quickly, the products would slide against each other in the stack. The static friction between the products limits the maximum Acceleration and ultimately the attainable Speed. Due to the intermediate stacking or two stacks that are created temporarily one above the other is time won to get a finished stack out of the machine, namely about as much time as the next stack for education.

However, the problem arises, the temporary support means to bring it into the stacking shaft quickly enough without the risk of colliding with those at high speed incoming products. The probability of a collision to reduce is in the known machine Rake that forms the temporary support means. The rake can move its teeth through the slots of the protrude downstream stop to in the To form a stacking shaft of temporary support means. The rake must perform a vertical movement in the shaft and it becomes at the bottom of the stacking shaft pulled out, outside the stacking shaft into the upper one Position returned to above the margin of the Products to be fed into the stacking shaft. thereupon it is in the stacking shaft in direct current with the in Chute dropping products moving down. Also there is no danger when the lowering speed is low the collision with incoming products because of the rake happens very quickly in the area where the products are over the take-off rollers are shot.

So that the rake performs the desired movement, the known machine has a type of cross slide with two linear axes running at right angles to each other. This arrangement is driven by two endless ones Belts that are connected to the support beam on which the Prongs of the rake are attached. The drive takes place via a toothed belt that runs around fixed rollers. by virtue of the rake always does the same in this arrangement Movement, regardless of whether products are stacked that seen short or long in the direction of transport.

The belt space curve must be designed so that the stroke of the rake in the direction of transport is sufficient, thus the teeth of the rake even for the largest products can be withdrawn behind the relevant stop. This is the way for very small products an extremely long idle stroke that takes up unnecessary time and also at very high speeds for small products forces. In particular, therefore, the folding machine can with small products not at higher speed work, although smaller products allow this easily would.

Furthermore, the cross slide with the two technically perpendicular linear axes very complex and requires large masses to be moved large second order forces.

The temporary supports in the form of arithmetic, are also used in the known machine to to hold down the stack of folding box tubes and depressed it in an output conveyor convict.

In this area, the rake must run parallel to the exit route be led and is therefore over a longer period Time period not available for recording trimmings. To bridge this time, in which the rake for Stacking is not available, on the other hand the lifting table but can also not be used, there will be more Support means used in the form of fingers that way long carry the stack of incoming products until the Lift table has become free from the previous stack and in the stack height can be raised.

Based on this, it is an object of the invention Device for stacking flat products in particular of folding box hoses to create the flexible one the size is adjustable, and the mechanically less complex is.

This object is achieved by the device solved with the features of claim 1.

There are two types in the device according to the invention temporary support means provided. The first edition means are fingers or similar elements that are in the Clearance profile of the stacking shaft in front of or out of this can be moved back without making a vertical movement perform.

You are not too far below that Level in which the products are transported in the stack shaft are shot. However, you are arranged deep enough to hold a stack of arises during the time that the lift table is not is ready to accept products. So far correlated the amount of this stack with the time it takes will get the lifting table free and back into the stacking position due.

The second temporary supports act as hold-downs, around the finished stack formed on the lift table hold together and into the exit conveyor threading. To accomplish this task, the Carry out two movements with the second temporary support means. You have to move vertically through the stacking chute and they have to leave the clearance profile on top of that of the stacking shaft.

In the solution according to the invention, the tines move the second temporary support means not parallel to the axis of the stacking shaft, but along an arc with a large radius. A swivel axis is provided for this purpose, which are perpendicular to the direction of transport and horizontal runs so that the bow movement occurs, which makes another linear axis superfluous. It is sufficient, in the solution according to the invention, if the second temporary support means only during the retraction movement from the stacking shaft and the feed movement in the stacking shaft move along a linear axis. The movement from top to bottom through the stacking shaft and outside the stacking shaft from bottom to top is not straight Move.

By appropriate position of the swivel axis is for this worried that in the lower position a bottom of the second temporary support means parallel to the stacking surface of the lifting table and that the retraction movement is off the stacking shaft parallel to the support surface of the lifting table he follows.

It has been shown that the angular error of the support side the second support means when walking through the Stacking shaft has no negative impact on quality of the stack. The mechanical effort for Leading the second temporary support means significantly reduced become.

The use of independent drives for which Swivel and the feed or retraction movement allowed it to adjust both movement strokes completely independently. This also reduces the free travel and thus the dead time, around which the tines behind the downstream ones Stop be withdrawn. The device is in able to operate folding machines that smaller folding box hoses with higher speed is working.

Particularly good stacking is achieved when one Stop, preferably the upstream stop is designed as a vibrator. This also enables one Subsequent adjustment of the folding box hoses when the Seam is glued and the adhesive has not yet cooled completely is.

The finished stacks can be reliably removed can be achieved if the output transport device several parallel conveyor belts includes. Moving the stack away from the lifting table is improved, if it is also fan-shaped, and at least one of the conveyor belts into a gap between the prongs of the lifting table.

This enables a low-build lift table to be reached who has no roles and will not Slider needed to get the stack down from the lift table slide.

Additional conveyor belts can be found next to the lifting table run and up to its upstream Edge.

The smooth movement of the conveyor belts and the absence of maintenance can be improved if the conveyor belts in the area of the respective work dream by roles get supported. This will make sliding pads avoided.

Locking the stack and thus the necessary The upper folding box hoses are also re-pressed achieved by placing the finished stack in a hold-down device is pinched. This is also expedient equipped with endless conveyor belts on the Work on top of the stack. The working dream of this Conveyor belts run parallel to the area that contains the working strand of the conveyor belts are formed on which the stacks rest.

Fig. 1

eine Vorrichtung zum Abstapeln von Faltschachtelschläuchen in einer stark schematisierten Seitenansicht und

Fig. 2-10

die weiter vereinfachte Vorrichtung nach Fig. 1 in den einzelnen Funktionsstufen und

Fig. 11

die Vorrichtung nach Fig. 1 für besonders große Faltschachtelschläuche bzw. Faltschachtelschläuche mit großer Rücksprungkraft.

For the rest, further developments of the invention are the subject of dependent claims. Combinations to which no express exemplary embodiment is directed should also be regarded as claimed. In the drawing, an embodiment of the object of the invention is shown. Show it:

Fig. 1

a device for stacking folding box hoses in a highly schematic side view and

Fig. 2-10

the further simplified device of FIG. 1 in the individual functional levels and

Fig. 11

1 for particularly large folding box hoses or folding box hoses with a high return force.

1 shows a device 1 for forming stacks 2 from flat products 3 for example folding carton blanks or folding box hoses. The representation is highly schematic, with only such parts illustrated are that are essential for understanding.

The products 3 run from the right in relation to FIG. 1 to the left and come from a folding machine, for example, in which the folding box blanks to folding box hoses be shaped, glued or along the seam to be stapled. Thus, there is a direction in FIG. 1 on the right an upstream direction in relation to the Product 3 stream and a leftward movement a downstream movement.

The machine 1 includes a machine frame 4, which illustrates highly schematized and cut open is. The machine frame 4 has side pillars 5, which are connected to one another via a transverse yoke 6. The Pillars 5 stand on a base foundation 7, on which also rear pillars 8 are raised. Between the backward support stands 8 and the pillars 5 extends an upper machine yoke 9 on which an underframe 11 is attached.

In the machine frame 4 is downstream of the two Pillar 5 a stacking shaft 12 formed laterally is open and downstream in the direction of transport from a stop 13 and upstream from a stop 14 is limited.

The stop 14 consists of an essentially planes Plate with vertical slits. The Plate 14 is attached to an eccentric shaft 15 which between the two pillars 5 is rotatably mounted. To this Way, the upstream stop 14 serves as Jogger. The stop 13, however, is essentially during the operation is fixed, but can be at a distance can be set to the stop 14.

Define both the stop 14 and the stop 13 Levels that are parallel to each other.

In order to transport the products 3 into the stacking shaft 12, a transport device 16 is provided which comprises two transport rollers 17 and 18. The two transport rollers 17 and 18 are axially parallel between horizontally the two pillars 5 stored and driven in rotation.

Their peripheral speed is greater than that Transport speed at which the products correspond 3 coming from the right.

The products 3 arrive in a continuous Stream to the transport device 16 and are in the stream spaced from each other. Be between the rollers 17 and 18 them into the stacking shaft 12 at high speed shot in and fall down in this, as will be explained in more detail below.

Located in the lower area of the stacking shaft 12 is a lifting table 19, which with the help of links 21 and 22nd back and forth between the two positions shown in Fig. 1 can be moved. The lifting table 19 is in the manner of a rake formed, and has several parallel to the direction of transport extending tines on over a Stiffening element 24 are interconnected. The movement of the lifting table 19 takes place essentially in parallel to the surfaces formed by the stops 13 and 14 are. The stop 13 is also designed as a rake and consists of several essentially vertically downwards hanging tines, between which are vertical and slits open downward are included.

In the area of the upper end position of the lifting table 19 are best first temporary support means recognizable in FIG 25 and 26 provided. The support means 25 are two Longitudinally movable fingers, which with the help of a Working cylinder 27 in the clearance profile of the stacking shaft 12 can be withdrawn before and from this. The two fingers 25 lead through corresponding openings through the upstream stop 14 and are located below the lower transport roller 16. The two fingers 25 are at such a distance from one another, that they have the smallest folding box hose to be processed can support laterally. In the case, that two such fingers are not enough, if very wide blanks can also be stacked in addition to these two fingers to the outside Fingers 25 are arranged. All fingers 26 are driven synchronously and at the same time in the stacking shaft 12 advanced or withdrawn.

Are located below the downstream stop 13 also fingers 26, which are also in the Clearance profile of the stacking shaft 12 in front of and out of this can be withdrawn.

For the sake of clarity, the drive devices are not shown for the fingers 26.

The fingers 25, 26 define a plane that is rectangular runs to the stop 14 or the stop 13, and which is not inclined transversely to the transport direction.

There is a second temporary support in the stacking shaft effective, which also as a rake regularly from spaced prongs 28 is formed.

The tines 28 sit on a crossbar, and each protrude after operating position through the slots in the downstream Stop 13 in the clearance profile of the stacking shaft 12th

On the back of the downstream stop 13 there are two mutually parallel guide rails 31, of which only one is recognizable for reasons of illustration is.

The two guide rails 31 sit at the bottom of one Intermediate frame 32 and serve as guide rails for one Guide carriage 33 on which the beam 29 below the Rails is guided. With the help of a drive device, not shown can the carriage 33 by means of not shown Timing belt along the two guide rails 31 be moved. The intermediate frame 32 is by means of an axis 35, which is attached to frame parts, not shown, pivotally mounted in the machine frame 4. The axis 35 runs below the guide rails 31.

The axis 35 runs horizontally and transversely to the transport path of products 3. The opposite end of the intermediate frame 32 is fixed to the frame via a handlebar arrangement 37 Vertical guide rails 38 out. Also here is the drive device for the sake of clarity for the handlebar 37 and an associated one in the guide rails 38 running carriage 41 not shown.

Vertical movement of the slide 41 comes for example Screw drives in questions while the Longitudinal movement of the slide 33 over endless toothed belts is accomplished.

The tines 28 of the second temporary support means can in this way behind the downstream Stop 13 are withdrawn, and they can also perform a pivoting movement with respect to the axis 35.

At the height of the lower position of the lifting table 19 a transport device 42 begins at the pillars 5, the several endless ones running parallel to each other Conveyor belts in the form of flat belts 43 includes. The Belts 23 are along the transport path by transport rollers 44 supports that are rotatable in the machine frame are stored. In this way, the conveyor belts form 43 working dreams that extend along a plane, which runs perpendicular to planes through the two stops 13 and 14 are defined. The level through which Working span of the conveyor belts 43 is defined increases starting from the pillar 5. The distance between the Conveyor belts 43 and the storage is chosen so that they reach partially between the tines of the lifting table 19 or walk past it sideways so that one Collision is avoided.

Is located above the transport device 42 a hold-down device 45 made of three parallel ones juxtaposed endless belts 46 is formed. The distance between the endless belts is like this chosen that the tines have 28 place between them, with a conveyor belt 46 in the middle of the group of tines 28 runs. The deflection roller necessary for this is next to the back of the stop 13 behind a corresponding Tine stored by this.

The hold-down device 45 begins just behind the downstream stop 13 and is sufficient as shown about to the end of the transport device 42 Bottom edge of the stop 13 is flush with the plane that is defined by the working dreams of the conveyor belts 46 Between the hold-down device 45 and the transport device 42 a channel is defined, which at the beginning and has the same clear height at the end.

The storage rollers for the conveyor belts 43 and 46, are indicated schematically in the figure, but otherwise not described further, since the manner of storage the Expert is familiar and, moreover, the way of Storage for further understanding of the invention is not is important.

The operation of the stacking device is now explained with reference to Figures 2 to 10.

The distance between the two stops 13 and 14 is set by adjusting the position of the stop 13. The distance is chosen so that the products 3 essentially fit in between if they are on one of the Support means or the lifting table 19 rest.

2, the lifting table 19 is in the top position raised. The prongs 28 are in that Clearance profile of the stacking shaft 12 advanced because the guide rails 31 pivoted into the lowest position are. In this position the underside of the tines runs 28 in extension of the area caused by the working dream of the conveyor belts 46 of the hold-down device 45 is defined. To largely avoid collisions, in this position the tines 28 are aligned with the corresponding ones Gaps in the table 19.

The fingers 25 and 26 of the first support means are in the clearance profile is advanced so that it neither collide with the prongs 28 and the lifting table 19.

If in this position according to FIG. 2, the first folding box hose 3 is shot, he comes on the Top of the tines 28 to lie. More folding box hoses lie on the one below from the stack already in the stack 12 from how this shows Fig. 3. The stack is initially from the Top of the prongs 28 worn.

After a few folding box hoses 3 arrived 4, the carriage 33 is shown longitudinally the guide rails 31 withdrawn until the free Ends of the tines 28 completely out of the stacking shaft 12 are pulled out and disappeared behind the stop 13 are. The already created low stack of 3 or 4 Folding box hoses lying on top of each other fall during pulling the tines 28 out of the stacking shaft 12 on fingers 26 and 27. These are also withdrawn, so that the stack, as shown in FIG. 5, is now open the top of the lifting table 19 comes to rest.

In Fig. 4 the lifting of the tines 28 has already started. They are raised a little, i.e. they run no longer exactly parallel to the plane, accordingly the working strand of the endless belts 46.

During the stacking of the folding box hoses on the lifting table 19, the guide rails 31 pivoted upwards about the axis 35 into the upper end position. For this purpose, the guide rails 31 over the slide 41, which is guided in the guide rails 38 and accordingly is driven, on the stop 13 adjacent End raised.

After reaching the upper position, the part-turn actuator is activated for the guide rails 31 stopped and instead whose drive for the slide 33 is in motion. The tines 28 are through the gaps in the stop 13 in the stacking shaft 12 advanced. In the advanced position its underside is clearly above that level, lengthways those, the folding box hoses 3 in the stacking shaft 12 5, as can be seen in FIG.

As soon as the desired number of folding box hoses is reached in the stack 2, the swivel drive for the guide rails 31 in the sense of lowering in motion set. The tines 28 run in direct current with the Folding box hoses 3 falling down through the stacking shaft 12.

During the transition from FIG. 5 to FIG. 6 continuously lowered the lifting table 19, to the extent in which the stack 2 has become higher, so that the top edge i.e. the head of the stack is always about the same distance from the bullet level remains, so that approximately the same case conditions for those arriving in the stacking shaft 12 Folding box hoses are available. During stacking the stop 14 is simultaneously via the eccentric shaft 15 periodically moved against the stack to put the stack together to shake and warping errors in the case of taped seams to correct a little on the folding box blanks.

The lower layers of the blanks are cut through the upper layers kept closed. Only the top layers can do something due to the resilience of the corrugated cardboard jump.

The lowering of the tines 28 in the stacking shaft 12 happens synchronized, so the tips of the prongs 28, the bullet level at the transport rollers at the moment happen in which there is no folding box hose 3 is included.

After the tines 28 are lowered onto the stacking head are and squeeze them, the fingers 26 and 27 advanced, as can be seen in FIG. 7. In Fig. 7 the stack is compressed by force from above the tines 28 are pressed open. This creates space to advance the fingers 26 and 27 into the stacking shaft 12.

As soon as the tines 28 rest on the stack 2, this is done inevitably the further stacking on the top of the Prongs 28 that compress the stack 2 underneath hold. Now the transport device for the carriage 33 started to move the tines 28 in To move current direction. At the same time, the conveyor belts 43 of the transport device 42 also switched on and also the conveyor belts 46 of the hold-down device 45. The stack 2 compressed with the aid of the prongs 28 is in the channel between the hold-down device 45 and the transport device 42 threaded and in Transported direction, as shown in Fig. 9. there run all the parts that are engaged with the stack 2, with the same linear velocity.

After the stack 2 is fully threaded according to FIG. 10 is what is achieved at the latest when the Carriage 33 its farthest from stop 13 the cycle has started 4 again.

While it is taking away the whole stack 2 stacking on fingers 26 and 27 so that time is created to in the now free lifting table 19 again to move the recording position upwards. So it says in Interaction between stacking on fingers 25 and 26 as well as enough time on the lifting table 19 around the tines 28 over their relatively long path to bring it back to the starting position according to FIG. 5.

The fingers 25 and 26 can be relatively weak dimensioned because the stack they have to carry until the lift table is in position again, relatively small and therefore light.

The main advantage of the arrangement according to the invention is that the tines are pivoting complete with respect to axis 35. This simplifies the storage essential. In addition, the swivel drive and the horizontal drive is mechanically decoupled from one another. In this way, the longitudinal stroke that the tines 28th perform parallel to the surface of the lifting table 19 on the Be limited to the amount necessary to keep them straight behind withdraw the stop 13. You need small ones Folding box hoses 3 do not have the same stroke go through as with large blanks. In this way the folding machine that cuts the folding box 3 generated, run much faster with small blanks than with large blanks, so even though the cycle time is determined by the structure of the folding straps higher throughput occurs.

So far no dimensioning information for lengths and Widths have been made, they result from the above Functional description in a natural way.

For folding box hoses that are in the transport direction seen very large dimensions, it can after shooting in the stacking shaft 12 for premature contact the leading edge of the inserted carton tube with the top of the already formed Stacks come. The leading edge then tends to go under Under certain circumstances, getting caught, with which the cardboard slants in the Chute 12 remains.

In order to avoid this effect, according to FIG. 11, the upper yoke 9 or the lower frame 11 are lowered somewhat, whereby a greater depth of the stacking shaft is reached becomes. Accordingly, there is another one on the pillars 5 Set of fingers 25 'provided below the Fingers 25 lie, namely by the amount of the additional Stacking shaft depth.

When lowering the downstream one Stop 13 and the hold-down device 45 accordingly with lowered. Because the fingers 26 on the downstream Rakes 13 are attached, additional here Elements saved.

A device for stacking folding box hoses has a height-adjustable lift table. The first temporary support means are located above the lifting table, which are pulled out of the stacking shaft or into these can be advanced. Another set of temporary support means can be both from the stacking shaft be pulled out as down in the stacking shaft be moved. The second support means serve simultaneously to do this, press a finished stack together around it between a transport device of a hold-down device to be able to thread. While the lift table is together with the second support device with the removal of the Stapels is busy, the first temporary support means for the fact that in the Stacking shaft can be stacked.

Claims (39)

Device for stacking flat products into stacks, in particular folding box blanks (3) or folding box hoses, which arrive one after the other in a stream, with a machine frame (4), with a transport device (16) which is arranged upstream in the machine frame (4), with a stacking shaft (12) which is arranged downstream of the transport device (16) in the machine frame (4) and which is bounded by a stop (13, 14) upstream and downstream, with a lifting table (19), which is mounted in the clearance profile of the stacking shaft (12) in the machine frame (4) and can be moved, with first temporary support means (25, 26) which can move back and forth between an active position in which they protrude into the clearance profile of the stacking shaft (12) and an inactive position in which they are withdrawn from the clearance profile ( 4) are stored, with an output transport device (42) which begins in the clearance profile of the stacking shaft (12) and extends downstream in the machine frame (4), with a hold-down device (45) which begins outside the clearance profile of the stacking shaft and extends at least a little along the transport device and above it, and with second temporary support means (28) which are mounted in the machine frame (4) in such a way that they both between an active position in which they protrude into the clearance space of the stacking shaft (12) and an inactive position in which they emerge from the clearance space are withdrawn, can be moved back and forth and can also be pivoted about a pivot axis (35) lying outside the stacking shaft (12), so that they co-current with the products (3) moving vertically downwards in the stacking shaft (12) from above the transport device (16) can be lowered to the height of the hold-down device (45). Apparatus according to claim 1, characterized in that the transport device (16) has a transport speed which is greater than the speed at which the products (3) otherwise run in the stream. Device according to claim 1, characterized in that the transport device (16) is formed by two axially parallel transport rollers (17, 18), at least one of which is preferably both driven. Apparatus according to claim 1, characterized in that the stacking shaft (12) is open on the side. Device according to claim 1, characterized in that the upstream stop (14) begins below the transport device (16) and extends to a height which is lower than the top of the lifting table (19) in the fully lowered position. Device according to claim 1, characterized in that the upstream stop (14) is designed as a vibrating stop. Device according to claim 1, characterized in that the upstream stop (14) is essentially smooth in the direction of movement of the products (3) falling vertically through the stacking shaft (12). Device according to claim 1, characterized in that the upstream stop (13) has a lower edge which is at a height which is lower than the upper side of the lifting table (19) in the maximum position. Apparatus according to claim 1, characterized in that the downstream stop (13) has the shape of a rake (12), with a plurality of parallel, spaced-apart tines which run vertically and surfaces which are substantially parallel to the upstream stop (13) define. Apparatus according to claim 1, characterized in that the lifting table (19) has the shape of a rake, with a plurality of tines arranged in parallel at a distance from one another, the free ends of which point in the downstream direction. Apparatus according to claim 1, characterized in that the lifting table (19) is mounted below and upstream of the upstream stop (14) in the machine frame (4). Device according to claim 1, characterized in that the upstream stop (14) for the passage of the bearing means (22, 23) for the lifting table (19) has slots. Device according to claim 1, characterized in that the first temporary supports (25, 26) have a total of at least four fingers, two of which can be pushed into the stacking shaft (12) through a plane defined by the upstream stop (14) and the others both can be pushed into the clearance profile of the stacking shaft (12) by a plane defined by the downstream stop (13), and that the fingers (25, 26) in the advanced state define a contact surface which is essentially perpendicular to the upstream and the upstream stop (13, 14). Apparatus according to claim 1, characterized in that the output transport device (42) has a plurality of conveyor belts (43) running parallel to one another. Device according to claim 14, characterized in that the lifting table (19) is constructed in a rake shape with at least two tines, and in that at least one of the conveyor belts (43) extends between the tines. Device according to claim 14, characterized in that , based on the width of the transport path, the outer conveyor belts (43) run around deflection rollers, which are located laterally next to the lifting table (19) in the vicinity of the upstream stop (14) in the machine frame (4 ) are stored. Device according to claim 14, characterized in that all the conveyor belts (43) run and are driven at the same transport speed. Device according to claim 14, characterized in that the conveyor belts (43) define with their working strands a transport plane which rises in the transport direction. Apparatus according to claim 14, characterized in that the conveyor belts are supported by rollers (44) in the area of their working dreams. Apparatus according to claim 1, characterized in that the hold-down device (45) is formed by a plurality of endless conveyor belts (46) arranged next to one another in parallel. Apparatus according to claim 20, characterized in that the conveyor belts (46) of the hold-down device (42) run around deflection rollers which are rotatably mounted downstream of the downstream stop (13) in the machine frame (4). Device according to claims 14 and 20, characterized in that the working volume of the conveyor belts (46) of the hold-down device (42) define a plane which is parallel to the plane of the conveyor belts (43) of the conveyor device (42). Device according to claims 14 and 20, characterized in that the conveyor belts (43) of the transport device (42) and the conveyor belts (46) of the hold-down device (45) run at the same speed. Device according to claim 1, characterized in that the second temporary support means (28) are formed by a rake which has parallel, spaced-apart tines which are movable in the gaps between the tines of the downstream stop (13). Apparatus according to claim 1, characterized in that the second temporary support means (28) are attached to a carriage (33) which is guided downstream of the downstream stop (13). Device according to Claim 25, characterized in that at least one guide rail (31) is provided for guiding the carriage (33), which can be pivoted about a pivot axis (35) which extends horizontally and which is perpendicular to the transport direction of the products (3) is aligned on the transport device (42). Device according to claim 1, characterized in that the at least one guide rail (31) is assigned drive means (37, 38, 41) in order to pivot the guide rail (31) up and down about the pivot axis (35). Device according to claim 1, characterized in that drive means are provided to guide the carriage (33) along the guide rail (31). Device according to claim 1, characterized in that control means are provided to coordinate the movement of the moving parts of the device (1) with each other. Device according to claim 1, characterized in that the drive device (37, 38, 41) for the guide rails (31) comprises a vertical guide (38) in which a further adjustment slide (41) can be moved vertically, on which the guide rail (31) is connected. Device according to claim 1, characterized in that the downstream stop (13) is adjustably held in the machine frame (4) in such a way that its distance from the upstream stop can be adjusted to the dimensions of the products (3), viewed in the direction of transport to adjust the depth of the clearance profile of the stacking shaft (12). Apparatus according to claim 1, characterized in that the stroke of the second temporary support means (28) in the direction parallel to the guide rails (31) is adjustable, such that the idle stroke by which the tines of the second temporary support means (28) from the light profile of the stacking shaft (12) can be pulled out, can be minimized. Device according to claim 1, characterized in that the drive (37, 38, 41) for pivoting the guide rails (31) about the pivot axis (35) and the drive for longitudinally moving the slide (33) of the second temporary support means (28) mechanically from one another is decoupled in such a way that the movements are independent of one another in terms of time and stroke. Device according to claim 1, characterized in that the hold-down device (45) can be changed in the direction perpendicular to the transport plane defined by the transport device (42). Device according to claim 1, characterized in that third temporary support means (25 ') are provided, which include at least two fingers, which are located at the level of the lowered hold-down device (45) in the region of the upstream stop (14). Apparatus according to claim 1, characterized in that the second temporary support means (28) can be brought into a lower position, in which their underside is at the level of a plane which is defined by the working span of the hold-down device (45). Apparatus according to claim 36, characterized in that in the lower position the guide rail (31) for the second temporary support means (28) runs parallel to the plane defined by the working strand of the hold-down device (45). Apparatus according to claim 1, characterized in that, in order to lead the stack (2) away from the stacking shaft (12), the second temporary support means (28) are pulled out of the stacking shaft (12) at the same linear speed with which the working strand of the transport device is extended (42) and move the working strand of the hold-down device (45). Device according to claim 1, characterized in that at least one endless belt (46) of the hold-down device (45) extends into the vicinity of the rear of the downstream stop (13) and runs between two prongs of the withdrawn second temporary stacking means (28).

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