EP3015410A1 - Device and method for stacking pre-folded cartons - Google Patents

Abstract

The invention relates to an apparatus and a method for stacking prefolded cartons (1), wherein prefolded cartons are conveyed to a feed basket (20) in a shingled stream (2) in which the cartons overlap like shingles, to a stacking basket (34), and in which Stacking basket the prefolded boxes are stacked to a stack (6). The stack of pre-folded cartons is placed on at least one receiving member (31, 32) which is vertically moved depending on a height of the stack between an upper picking position and a lower picking position. The stacking basket is rotated in dependence on a control device, wherein the prefolded cartons are deposited on the stack and wherein at least when rotating the stacking basket, the upper carton is held down in the stack by means of a first hold-down device (40).

Description

The invention relates to a device for stacking prefolded cartons according to claim 1 and to a method for stacking prefolded cartons according to claim 11.

When stacking folded printed products, it is known to use Kreuzlegevorrichtungen, also known as crosslapper. Printed products with a lateral fold, as occur for example in brochures and booklets, have a greater thickness in the folded area. When forming larger stacks, this one-sided thickening leads to a curvature of the stack. To avoid this unwanted curvature, the printed products are stacked crosswise. In this case, partial stacks are each rotated by 180 °, that is, placed in a cross. This compensates for the one-sided thickness difference in the rebate area.

Such stackers have long been known, such as from the DE 43 28 604 C2 , of the DE 196 15 009 B4 , of the CH 440 130 or the DE 1 481 281 ,

The known cross-stackers are usually designed to criss-cross several dozen or several hundred printed products per minute, which are delivered in a so-called scale flow from a printing press, and are usually transported further to a packaging station for further packaging. Cross stackers are therefore designed for mass processing with large quantities per minute or hour. Cross stackers therefore have to work particularly reliably.

Occurs approximately in the processing of printed matter, which are discharged from a rotary printing machine in a scale flow in the stacker A disruption has an impact on the whole process. Since rotary printing presses are rarely stopped to maintain their efficiency, a disturbance in the cross-stacker means that the imbricated flow of printed products must be discharged when the printing press continues to run, so that the discharged printed products usually have to be destroyed as broke.

Attempts have also been made to stack cartons criss-crossed with cross stackers. However, unlike folded paper products, prefolded cartons have a relatively high restoring force and also a material causes highly fluctuating restoring behavior. In the processing of folded cartons in conventional crossfeeders, which perform excellently for paper printed products, this strong and fluctuating return behavior of prefolded cartons relatively often causes malfunctions. In particular, folded cartons also lead to collisions with machine parts, whereby the operation is disturbed and must be interrupted again and again. Therefore, the stackers provided for paper products are not applicable for economical processing of folded cartons.

The invention has for its object to provide an apparatus and a method with which prefolded boxes can be reliably and economically stacked and processed.

The invention is solved by a device having the features of claim 1 and a method having the features of claim 11. Preferred embodiments of the invention are specified in the respective dependent claims.

• eine Zufördereinrichtung zum Zufördern der zu stapelnden vorgefalteten Kartons in einem Schuppenstrom, bei welchem die Kartons schuppenartig überlappen,
• einen Stapelkorb, welcher drehbar gelagert und angetrieben sowie zur Aufnahme eines Stapels von vorgefalteten Kartons ausgebildet ist,
• mindestens ein im Bereich des Stapelkorbes angeordnetes Aufnahmeelement, welches zwischen einer oberen Aufnahmeposition und einer unteren Aufnahmeposition vertikal verfahrbar ist, und
• eine Steuereinrichtung, durch welche das Aufnahmeelement abhängig von einer Stapelhöhe der darauf abgelegten gestapelten Kartons von der oberen Aufnahmeposition zu der unteren Aufnahmeposition verfahrbar ist,

wobei an dem Stapelkorb eine erste Niederhalteeinrichtung angeordnet ist, durch welche zumindest beim Drehen des Stapelkorbes der obere Karton in dem Stapel niedergehalten ist.According to the invention there is provided an apparatus for stacking prefolded cartons which comprises:

• a feed device for feeding the prefolded cartons to be stacked in a scale flow in which the cartons overlap in an imbricated manner,
• a stacking basket rotatably supported and driven and adapted to receive a stack of prefolded cartons;
• at least one arranged in the region of the stacking basket receiving element which is vertically movable between an upper receiving position and a lower receiving position, and
• a control device, by means of which the receiving element can be moved from the upper receiving position to the lower receiving position as a function of a stacking height of the stacked cardboard boxes deposited thereon,

wherein on the stacking basket, a first hold-down device is arranged, by which at least when turning the stacking basket, the upper carton is held down in the stack.

A basic idea of the invention can be seen in the fact that the prefolded boxes are stacked crosswise or offset in accordance with the procedure in a cross-stacker. However, in order to avoid the problems with the relatively strong and variable restoring behavior of the folded cardboard product, according to the invention, a special hold-down device is provided. In particular, it has been found that in the case of the very fast movements of the stacking basket and the cartons when forming and depositing partial packages of the folded cartons, folded cartons can open so far due to the movement that disruption and interruptions to operation may occur during further stacking. By the holding-down device according to the invention, in particular on the stacking basket, a defined hold-down force can be applied to the upper folded cardboard in the stack and thus to the stack as a whole. This allows another exact stacking of the carton in the stacking basket. In addition, further unfolding during movement is counteracted in the stacking basket. Due to the rotatable stacking basket, partial packages can be stacked at 90 ° or 180 ° twisted to each other.

A particularly preferred embodiment of the invention is that in the stacking basket, a basket bottom is arranged, which is adjustably mounted and driven between an upper lifting position, in which the stack can be transferred from the receiving element and a lower stroke position. The receiving element above the stacking basket may be formed approximately like a rake. In particular, a plurality of receiving elements can be arranged in a receiving basket above the stacking basket, which are operated alternately. Thus, a first receiving element may be arranged in an upper receiving position in order to receive therein the first prefolded cartons from the shingled stream. At the same time, a second receiving element may be positioned in a lower receiving position, in which the second receiving element is a partial stack of rectified and stacked boxes on a lifting floor in the stacking basket passes. After the transfer, the second receiving element can move up into the receiving position, while the first receiving element is moved in accordance with the stacking height forming by the supplied cardboard down in the direction of the lower receiving position and in a reject position. After transfer of a partial stack on the lifting floor of the stacking basket can be rotated by a rotary drive by 180 °, so that the next supplied partial stack of rectified boxes can be placed crosswise on the entire stack. According to the forming total height of the stack, the lifting floor can be moved from an upper stroke position at the beginning of the stacking to a lower stroke position, in which the crosswise deposited total stack reaches its final height.

A particularly reliable hold down is achieved according to a further embodiment of the invention in that the first hold-down device has at least one hold-down arm, which is movable along the stack and presses with a predetermined hold-down force on the upper carton of the stack on the lifting floor. The one or more hold-down arms of the first hold-down device may be movably mounted in a side region of the stacking basket or separately therefrom. As a hold-down device, a compressed air device is basically possible, which generates a directed compressed air jet from the top of the folded-up cardboard on top of the stack. The first hold-down device is preferably mounted co-rotating with the stacking basket.

A particularly reliable and compact stacking of pre-folded boxes is achieved according to a further embodiment of the invention in that in a transfer area between the feed device and the stacking basket, a second hold-down device is arranged, held down by which in stacking the prefolded cartons on the receiving element a respective upper carton is. With the second hold-down device, a hold-down force is exerted already on the receiving element when forming the stack and when transferring the carton from the feed device. As a result, even at this stage of the stacking operation it is ensured that the uppermost cardboard in the stack does not set up in an undesired manner.

In this case, a preferred development of this device according to the invention is that the second hold-down device has at least one rotationally mounted and driven roller body, on the outer circumference of which flexible hold-down elements are arranged. In particular, the second hold-down device may comprise at least one roller body, on whose outer side flexible lamellae or rods are arranged. In the case of a feed from the right, the roller body would rotate in a clockwise direction, so that on the one hand the feed movement is supported by the flexible hold-down elements and the rotational movement of the roller body, and on the other hand a hold-down force is thereby exerted on the carton.

For a reliable stacking of the cartons, it is also advantageous according to the invention that an ejector is provided on the stacking basket, through which the stack can be pushed out horizontally when reaching a final height of the stack on the lifting floor in the stacking basket, and that in the region of the ejector third hold-down means is arranged, through which for holding down the stack on the upper prefolded cardboard of the stack, a hold-down force can be applied. Once the final height of the stack in the stacking basket is reached, the finished stack is ejected from the stacking basket. In this case, the stack is disengaged from the first hold-down device. At the latest at this time, the stack is acted upon by the third hold-down device in order to counteract an undesirable unfolding of the uppermost carton on the finished stack. The third hold-down device can be arranged directly on the ejection device or separately therefrom.

In principle, the third hold-down device can be designed as desired, for example as a compressed air device. According to one embodiment of the invention, it is particularly preferred for the ejection device to have at least one horizontally movable slide on which at least one hold-down element is adjustably mounted between a hold-down position and a retracted position. The at least one hold-down member may be formed rod-shaped. The rod-shaped hold-down member can be adjusted via an actuating cylinder, in particular a pneumatic or hydraulic cylinder, between an approximately vertical retraction position and an approximately horizontal hold-down position.

According to a further embodiment variant of the invention, it is advantageous that the stack can be conveyed to a transfer device by the ejection device, which has at least one lower conveyor belt and at least one upper conveyor belt, and that the lower conveyor belt and the upper conveyor belt have a distance to each other, which is approximately corresponds to the height of the stack. The ejector takes over essentially only the displacement of the stack from the laterally open stacking basket. Once the slide of the ejector has reached its end position when ejecting, this moves back to its initial position in the stack basket. Thus, the third hold-down device again comes out of engagement with the stack. At this time at the latest, the stack is stacked between a lower conveyor belt and an upper conveyor belt, the distance between the two conveyor belts being set so as to hold down the upper carton on the stack. Thus, an unwanted placement of at least the upper carton in the stack is prevented at this time by the special arrangement of the two conveyor belts.

A further advantageous embodiment of the invention consists in that the stack can be conveyed by the transfer device to a packaging station in which the stack can be provided with a strapping, wherein the height of the stack is determined by the upper conveyor belt and the lower conveyor belt until the strapping is formed is. In the packaging station, a strapping device can be provided, which is basically known and usually used for strapping stacked printed products. According to the embodiment variant according to the invention, the stack is held down until the strapping by the two conveyor belts so that the uppermost carton can not unfold. During the strapping of the stack, it is wrapped with a plastic band once or several times, so that a compact stable stack is formed.

According to a further embodiment of the invention, it is advantageous that a board machine is provided, through which prefolded cartons can be produced, which can be transferred in a scale flow to the feed device. Such carton machines for forming prefolded cartons are well known. In particular, such board machines can also be designed to make not only a trimming and folding of cardboard but also bonds. The pre-folded boxes can be provided in particular for forming folding boxes or carrier boxes, as they can be used for example in the packaging and transport of food and meals.

• vorgefaltete Kartons mit einer Zufördereinrichtung in einem Schuppenstrom, bei welchem die Kartons schuppenartig überlappen, einem Stapelkorb zugefördert werden,
• in dem Stapelkorb die vorgefalteten Kartons zu einem Stapel aufgestapelt werden,
• der Stapel von vorgefalteten Kartons auf mindestens einem Aufnahmeelement angeordnet wird, welcher abhängig von einer Stapelhöhe zwischen einer oberen Aufnahmeposition und einer unteren Aufnahmeposition vertikal verfahren wird, und
• der Stapelkorb abhängig von einer Steuereinrichtung gedreht wird, wobei die vorgefalteten Kartons verdreht auf dem Stapel abgelegt werden,
• wobei zumindest beim Drehen des Stapelkorbes der obere Karton in dem Stapel mittels einer ersten Niederhalteeinrichtung niedergehalten wird.

According to the invention, a method for stacking prefolded cartons is provided in which

• Prefolded cartons with a feeder device in a scale flow, in which the boxes overlap like scales, are fed to a stacking basket,
• in the stacking basket the prefolded boxes are stacked in a stack,
• the stack of prefolded cartons is disposed on at least one receiving element which is vertically moved depending on a stacking height between an upper picking position and a lower picking position, and
• the stacking basket is rotated as a function of a control device, wherein the prefolded boxes are placed twisted on the stack,
• wherein at least when rotating the stacking basket, the upper carton is held down in the stack by means of a first hold-down device.

For the method according to the invention, in particular the apparatus described above can be used for stacking prefolded cartons. With the method according to the invention, the advantages described above can be achieved.

A preferred embodiment of the method according to the invention consists in that the feed device has a lower conveyor and an upper conveyor through which the prefolded cartons are pressed onto the lower conveyor in the shingled stream. Thus, the shingled stream is already subjected to a holding-down force during the feeding of the prefolded cardboard boxes, in particular from a board machine. This prevents pre-folded boxes from building up in the course of the scale flow and lead to a malfunction. The conveyors may be roller conveyors or preferably circulating conveyor belts. The feed device can have a plurality of conveying devices arranged one behind the other, so that the continuous scale flow can be separated or separated into subsections by appropriate control of the conveying devices. From these then partial stacks are formed, each with the same orientation of the boxes. The partial stacks can be placed crosswise to the total stack. In the feed device, other separating devices may be provided.

A particularly reliable stacking of the pre-folded boxes is achieved according to a further preferred embodiment of the invention in that in a transition region between the feed device and the stacking basket, a second hold-down device is arranged, is held down by the stacking of the prefolded cartons on the receiving element a respective upper carton , Thus, even when stacking the unfolded cartons to a partial stack on the receiving element it is ensured that the upper carton does not unfold in an undesired manner.

According to a further advantageous embodiment variant of the method according to the invention, it is provided that upon reaching a final height of the stack in the stacking basket, the stack is ejected horizontally with an ejection device and that a third hold-down device is arranged on the ejection device, through which the hold-down of the stack on the upper prefolded Carton of the stack a hold down force is applied. This ensures that even when dispensing and transferring the stack from the stack basket undesirable unfolding of the upper cartons occurs in the stack.

In accordance with the invention, it is particularly preferred that from dispensing the prefolded cartons from a board machine to dispensing the cross stacked stack to a wrapping station, a hold down force be applied to the stack of prefolded cartons, such that undesirable unfolding occurs throughout the process the top cartons in the stack is counteracted.

Fig. 1

eine schematische Querschnittsansicht einer Zufördereinrichtung einer erfindungsgemäßen Vorrichtung;

Fig. 2

eine schematische Detailansicht eines Aufnahmeelementes in der erfindungsgemäßen Vorrichtung;

Figuren 3a, 3b, 3c

schematische Seitenansichten bei der Übergabe eines Teilstapels in einen Stapelkorb einer erfindungsgemäßen Vorrichtung;

Figuren 4a, 4b, 4c

schematische Seitenansichten zum Ausstoßen eines Stapels aus dem Stapelkorb einer erfindungsgemäßen Vorrichtung;

Fig. 5

eine schematische Seitenansicht eines Stapels in einer Verpackungsstation einer erfindungsgemäßen Vorrichtung; und

Fig. 6

ein schematisches Anordnungs- und Ablaufdiagramm zu der Erfindung.

The invention will be further elucidated on the basis of preferred exemplary embodiments, which are illustrated schematically in the attached drawings. In the drawings show:

Fig. 1

a schematic cross-sectional view of a feed device of a device according to the invention;

Fig. 2

a schematic detail view of a receiving element in the device according to the invention;

FIGS. 3a, 3b, 3c

schematic side views of the transfer of a sub-stack in a stacking basket of a device according to the invention;

FIGS. 4a, 4b, 4c

schematic side views for ejecting a stack from the stacking basket of a device according to the invention;

Fig. 5

a schematic side view of a stack in a packaging station of a device according to the invention; and

Fig. 6

a schematic arrangement and flow chart of the invention.

A device 10 according to the invention for stacking prefolded cartons 1 is shown in FIG Fig. 1 shown. From an only schematically indicated board machine 90 are prefolded cartons 1 in a shingled stream 2, in which the boxes 1 are arranged like a scaly overlapping, conveyed via a feed device 20 to a Kreuzlegeeinrichtung 30. In the present exemplary embodiment, the feed device 20 has a first feed device 20a with a first lower conveyor 22a and a first upper conveyor 24a and a second feed device 20b, which likewise comprises a second lower conveyor 22b and a second conveyor 24b. The lower conveyors 22 and the upper conveyors 24 are each an endless circulating Conveyor belt formed. The first feeder 20a receives the continuously generated shingled stream 2 from the board machine 90 in a substantially horizontal arrangement. The conveying speed of the first feeding device 20 can be slowed or interrupted at certain times, so that the scale flow 2 is separated into partial streams, which then in each case by the second feed device 20b in a slightly rising arrangement in the Kreuzlegeeinrichtung the device 10 for stacking the cartons 1 on become. The arrangement of the upper conveyors 24 ensures that the prefolded cartons in the shingled stream 2 do not unfold during their transport path from the board machine 90 to the cross-laying device 30 and lead to a business interruption due to a collision with machine parts.

According to the schematic representation of Fig. 2 the transfer of the folded cartons 1 in the shingled stream 2 from the feed device 20 with the belt-shaped lower conveyor 22 and the belt-shaped upper conveyor 24 in a receiving basket 38 of the cross-laying device 30 is illustrated. In the receiving basket 38, a rake-like first receiving member 31 is movably arranged in a vertical direction to receive cartons 1 for forming a sub-stack 4.

In this case, a second hold-down device 50 is provided in a transfer region, which has a rotationally driven roller body 52. Along the circumference of the roller body 52, a plurality of flexible, rod-shaped hold-down elements 54 is arranged, of which in Fig. 2 only a partial area is shown. By this brush-like hold-down elements 54 and the rotational movement of the roller body 52 in a clockwise direction, an upper side of the respective transferring prefolded cardboard 1 is acted upon in such a way that the prefolded cardboard 1 can not unfold. The cardboard 1 conveyed from the right can have a fold in its right side region. Due to the elastic material properties of cardboard or paperboard, there is a risk that the prefolded cardboard 1 will unfold due to restoring forces from a substantially two-dimensional plane. This unfolding is prevented when passing through the second hold-down device 50.

Depending on the resulting height of the sub-stack 4, the first receiving element 31 is moved vertically downwards. During the downward driving of the first receiving member 31 may be provided for retraction into the upper receiving position at the same time a not shown second receiving element 32, so that immediately a further partial stack 4 can be formed in the receiving basket 38 ann.

Upon reaching a predetermined height of a sub-stack 4 in the receiving basket 38, wherein the receiving element 31 has reached its lower receiving position, the rake-like receiving element 31 is moved laterally out of the rod-shaped receiving basket 38. The partial stack 4 passes into a stacking basket 34, which is arranged below the fixed receiving basket 38. The stacking basket 34 has a horizontal basket bottom 36 and approximately vertically directed stacking basket walls 35. The stacking basket 34 is pivotally mounted or rotatable about 180 ° about an axis of rotation 37 and driven, as in Fig. 3a is illustrated.

For transferring the partial stack 4 into the stacking basket 34, the basket bottom 36 can be moved upward by an unillustrated, indicated lifting device into an upper lifting position in order to receive the partial stack 4 of prefolded cardboard boxes 1. In order to prevent folding of the upper cartons 1 in the partial stack 4 in this transfer, a first hold-down device 40 with a hold-down arm 42 is arranged in the region of the stacking basket 34. The hold-down arm 42 is linearly displaceably guided along a vertically oriented linear guide 44 and can be moved via an actuating cylinder, not shown, so as to exert a defined hold-down force on the upper carton 1 in the partial stack 4 or the entire stack 6 in the stacking basket 34. During the loading of the stack 6 in the stacking basket 34 by the first hold-down device 40, the stacking basket 34 is rotated by 180 °, so that the next partial stack 4 according to FIG Fig. 3c offset by 180 °, so can be placed crosswise on the stack 6.

During the rotation of the stacking basket 34 with the stack 6 of prefolded boxes 1 arranged therein, a newly formed partial stack 4 with a rake-type second receiving element 32 is moved into the lower transfer position in the receiving basket 38, as in FIG Fig. 3c is shown. Then, according to the course of the FIGS. 3a and 3b the new upper part stack 4 from the fixed Receiving basket 38 are arranged in the arranged underneath, now rotated by 180 ° stacking basket 34. In this case, the hold-down arm 42 of the first hold-down device 40 is initially in a retraction position, not shown, so that a lowering of the upper part stack 4 is made possible on the stack 6 in the stacking basket 34. Then the hold-down arm 42 acts on the upper side of the new partial stack 4.

Upon reaching the final height of the stack 6 in the stacking basket 34, wherein a plurality of sub-stacks 4 may be laid crosswise, the stack 6 according to Fig. 4a ejected by means of an ejector 62 to a transfer device 70. According to Fig. 4b For this purpose, a vertically arranged slider 64 is moved along a horizontal guide 66 laterally against the stack 6 in the stacking tray 34 and this pushed out after a corresponding lateral opening of the stacking basket 34 on an approximately equal height arranged lower conveyor belt 72 of the transfer device 70. During the pushing out, the upper carton 1 in the stack 6 in the stacking basket 34 is pressed against the stack 6 from above by a hold-down member 68 of a third hold-down device 60. The hold-down member 68 is pivotally connected to the linearly movable slider 64 between a retracted position according to FIG Fig. 4a and a hold-down position according to Fig. 4b adjustable.

When pushing the stack 6 laterally into the transfer device 70, the upper carton 1 in the stack 6 is acted on by an upper conveyor belt 74 of the transfer device 70. The upper conveyor belt 74 is arranged parallel to the lower conveyor belt 72 and has for this purpose a distance corresponding to the height of the stack 6. After the upper conveyor belt 74 has acted on the top of the stack 6 so that the upper carton 1 can not unfold, the hold-down member 68 of the third hold-down device 60 from the hold-down position according to Fig. 4c back to the retreat position according to Fig. 4a pivoted. By a corresponding drive of the lower conveyor belt 72 and the upper conveyor belt 74, the Ausschiebebewegung the stack 6 is supported from the stacking basket 34.

From the transfer device 70 of the stack 6 according to Fig. 5 conveyed with the lower conveyor belt 72 and the upper conveyor belt 74 in a packaging station 80 with a conveyor belt 82. In the packaging station 80 is a sufficient known strapping 84 arranged, with which the cross-laid stack 6 is provided with a strapping 8. By this strapping 8 of the stack 6 is so tightly tied that a further unfolding of the cartons 1 in the stack 6 is no longer possible. From the strapping device 84 of the strapped stack 6 is conveyed on the conveyor belt 82 on. Optionally, a further packaging of the stack 6 with plastic film and a subsequent palletizing of the stack 6 for shipping.

According to Fig. 6 Once again, the basic arrangement of a device 10 according to the invention for stacking prefolded cartons 1 and the sequence of the method according to the invention is shown. The prefolded cartons 1 are formed in a board machine 90, which outputs the cartons 1 in a continuous shingled stream 2. This continuous scale flow 2 is separated, for example, by two separate feed devices 20a, 20b into subsections, which are then erected in the crosslapper 30 to form individual sub-stacks 4. The partial stacks 4 are stacked crosswise or alternately offset by 180 ° to form a total stack 6. Upon reaching a desired final height of the stacked stack 6 is conveyed by means of a transfer device 70 to a packaging station 80 with a strapping device 84.

If the stack 6 is not reliably stacked, it can be diverted from the cross-laying device 30 to a discharge device 15. There may optionally be a manual further processing.

The strapped stacks 6 are conveyed from the packaging station 80 to a further package, for example with plastic film, and subsequently to a palletizing station 87. In the palletizing station 87, the individual stacks 6 are stacked on a pallet and made available for shipment.

Claims (14)

Device for stacking prefolded cartons (1) with a feed device (20) for feeding the prefolded cartons (1) to be stacked in a shingled stream (2) in which the cartons (1) overlap like scales, a stacking basket (34) which is rotatably mounted and driven and designed to receive a stack (6) of prefolded cartons (1), - At least one in the region of the stacking basket (34) arranged receiving element (31, 32) which is vertically movable between an upper receiving position and a lower receiving position, and a control device, by means of which the receiving element (31, 32) can be moved from the upper receiving position to the lower receiving position as a function of a height of the stack (6) of the stacked cardboard boxes (1) deposited thereon, wherein on the stacking basket (34) a first hold-down device (40) is arranged, by which at least during rotation of the stacking basket (34) of the upper carton (1) is held down in the stack (6). Device according to claim 1,
characterized,
that in the stacking basket (34) a basket bottom (36) is arranged, which is adjustably mounted and driven between an upper stroke position in which the stack (6) of the receiving element (31, 32) can be übergebbar, and a lower stroke position. Apparatus according to claim 1 or 2,
characterized,
in that the first hold-down device (40) has at least one hold-down arm (42) which is movable along the stack (6) and presses with a predeterminable hold-down force onto the upper carton (1) of the stack (6) in the stacking basket (34). Device according to one of claims 1 to 3,
characterized,
that a second hold-down device (50) is arranged in a transfer area between the feed device (20) and the stacking basket (34) by which when stacking the pre-folded cartons (1) on the receiving element (31, 32) a respective upper cardboard (1) is held down. Device according to one of claims 1 to 4,
characterized,
in that the second hold-down device (50) has at least one rotationally mounted and driven roller body (52), on the outer circumference of which flexible hold-down elements (54) are arranged. Device according to one of claims 2 to 5,
characterized,
that on the stacking basket (34) an ejection device (62) is provided, through which upon reaching a final height of the stack (6) on the basket bottom (36) in the stacking basket (34), the stack (6) is horizontally ausschiebbar, and in that A third hold-down device (60) is arranged in the region of the ejection device (62), by means of which a hold-down force can be applied for holding down the stack (6) on the upper prefolded cardboard (1) of the stack (6). Device according to claim 6,
characterized,
in that the ejection device (62) has at least one horizontally movable slide (64) on which at least one hold-down member (68) is adjustably mounted between a hold-down position and a retracted position. Apparatus according to claim 6 or 7,
characterized,
in that the stack (6) can be conveyed by the ejection device (62) to a transfer device (70) which has at least one lower conveyor belt (72) and at least one upper conveyor belt (74), and
in that the lower conveyor belt (72) and the upper conveyor belt (74) are at a distance which corresponds approximately to the height of the stack (6). Device according to claim 8,
characterized,
in that the stack (6) can be conveyed by the transfer device (70) to a packaging station (80) in which the stack (6) can be provided with a strapping (8), the height of the stack (6) until the strapping is formed (8) by the upper conveyor belt (34) and the lower conveyor belt (32) is predetermined. Device according to one of claims 1 to 9,
characterized,
that a board machine (90) is provided, through which pre-folded cartons (1) are producible, which can be transferred in an overlapping stream (2) to the feeder device (20). Method for stacking prefolded boxes (1), in particular with a device (10) according to one of Claims 1 to 10, in which - Prefolded cartons (1) with a feed device (20) in a shingled stream (2), in which the cartons (1) overlap scaly, are fed to a stacking basket (34), in the stacking basket (34) the prefolded boxes (1) are stacked to form a stack (6), - The stack (6) of pre-folded boxes (1) on at least one receiving element (31, 32) is arranged, which is moved depending on a height of the stack (6) between an upper receiving position and a lower receiving position vertically, and - The stacking basket (34) is rotated depending on a control device, wherein the prefolded cartons (1) twisted on the stack (6) are stored, - Wherein at least when turning the stacking basket (34) of the upper carton (1) in the stack (6) by means of a first hold-down device (40) is held down. Method according to claim 11,
characterized,
in that the feed device (20) has a lower conveyor (22) and an upper conveyor (24) through which the prefolded cartons (1) in the shed stream (2) are pressed onto the lower conveyor (22). Method according to claim 11 or 12,
characterized,
that a second hold-down device (50) is arranged in a transfer area between the feed device (20) and the stacking basket (34) by which when stacking the pre-folded cartons (1) on the receiving element (31, 32) a respective upper cardboard (1) is held down. Method according to one of claims 11 to 13,
characterized,
that upon reaching a final height of the stack (6) in the stacking basket (34) the stack (6) is ejected horizontally with an ejection device (62) and that on the ejection device (62) a third hold-down device (60) is arranged, through which Holding down the stack (6) on the upper prefolded cardboard (1) of the stack (6) a hold-down force is applied.

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