EP0732290B1 - Device for transferring and piling cut piles of products in sheet form - Google Patents

Description

The invention relates to a device for applying and stacking of cut stacks of sheet-like material for the purpose Formation of total stacks, with a vertically movable as well horizontally retractable and retractable table, a device for Place the cut stack on the table, as well as one Device for fixing the cut stack when moving back the table for stacking the cut stack, the table is tapered at the front.

Such a device is known, for example, from US Pat. No. 4,055 261 known. After cutting a stack, it will open spent the table, laid it out there on a corner Pallet or on cut stacks that are already on the Pallet are to be stacked. For this, the table with its Bottom side as close as possible to the contact surface of the Pallet or the surface of the stored on the pallet Stack positioned. The table is in one piece and in the area its front end is pointed, in the area of Tip, towards the tip, the table surface inclined downwards is. The top serves the purpose of dropping the height between the table and the pallet or the stack resting thereon minimize so that there is good stacking quality. The cut stack on the table is created from sheet-shaped material in the area of the table that the has horizontal table surface, in close proximity to the section of the table that follows to form the tip tapered at the front. The top area is with diverse Provide recesses so that when the table is moved back Gripper of a gripper system fix the cut stack can and it is ensured that the cut stack from Table is not taken back.

A disadvantage of the known device that the conical tapered area of the table for stacking only of the cut stack is required, which is one horizontal paper support is guaranteed when applying, but the table has longer overall dimensions. This requires for the device increased space requirements and higher construction costs.

From practice it is known to be trained as described above To feed the table to create the stack so that the not cut stacks of sheet-like material when aligning only in the area of the one-piece table that is horizontal Has table surface, rests, but also on the Table surface of the conically tapered table area. This has the advantage that the entire table length is exploited and reduce the size of the device leaves. The disadvantage here is that the stacking cut stacks do not cover its entire surface is positioned horizontally, but in the area of the tip aslant. Because of the redirection of the stack, this requires one Displacement of the individual sheet layers, which results in a lower Stacking accuracy results.

DE 38 43 794 A1 describes a device for stacking Products, in particular books, brochures or the like known. The products positioned on a table are mechanically via a pivotally connected to the table Push-off plate fed to a product shelf, the Push-off plate in the area of its free front end the last stored product position in the product storage supports. It is also from DE-GM 71 15 077 a pallet truck known, with a pivoting push plate is provided. The pallet truck is used to hold one separate push plate on which the load rests, the Push-off plate as well as a push-on and push-off aid for the load for the introduction of flat pallets or flat, flexible Stacking documents in a clamping device for moving the Serving plate.

It is an object of the present invention to provide a device to create the type mentioned, with a compact design both a optimal creation of the cut stack as well as its optimal stacking allowed.

The task is solved with a device of the beginning mentioned type in that the table has a front and a rear table section for receiving the cut stack has, the front table section pivotable on articulated rear table section and by means of a power means is pivotable between two end positions, such that in the first end position the table surfaces of the two table sections form a horizontal plane and in the second End position the table surface of the front table section Table surface of the rear table section is pivoted.

Because of the design according to the invention, that of the table recorded cut stacks of sheet material in the pivoted up end position of the front table section of of the overall horizontal table surface, with which the stack is cuboid, i.e. without paper shift, can be created. It can thus be used to create the stack entire length of the front table section can be used. To the actual stacking becomes the front table section so far tilted down until the front end of the front table section at a slight distance from the pallet or to the this stack is positioned and it can then at effective device for fixing the cut stack of Table be retracted.

The cutting and / or fixing of the cut stack can be done very different ways can be accomplished. It can for example, a stop with a vertical contact surface on the front end of the front table section can be lowered, so that the cut stack manually or mechanically on this can be positioned. It is also conceivable to have several of these Provide stops on opposite sides of the cuboid, cut stacks can be brought up. Also the Device for fixing the cut stack can on be trained in different ways. This depends for example, depending on whether a stack of sheet-like material is to be stacked or this stack of a variety of Partial stacks is formed. One of a variety of Partial stacks formed stacks is the device for fixing the cut stack advantageous as a stop with vertical Stop surface formed, the stop behind positionable on the stack and on the facing surface of the Stack can be created, so that the stack when moving back Table is not moved back with. Basically, the Device for fixing the cut stack also as Be designed gripper system that the stack preferably in Encompasses the area of its front face. Nevertheless it is considered appropriate to use grippers if sensitive paper types are to be stacked or put on one particularly high stacking quality arrives. In this case when lowering the front table section Lower the gripper accordingly.

Advantageous developments of the invention provide that different according to the material to be stacked front table sections with the rear table section can be combined. The front table sections can in particular variable tips, for example with and without gripper cutout, differently positioned gripper cutouts for different stack base formats and if necessary Have air vents in the table surface.

A structurally particularly simple design of the device results when the front table section between two Stops pivotable relative to the rear table section is, in particular pneumatically pivotable. It is there sufficient if the table surface of the front table section at an angle less than 10 ° from which Horizontal is pivotable.

Further features of the invention are in the dependent claims Description of the figures and the figures themselves, it being noted that all individual features and all combinations of individual features are essential to the invention.

Figur 1

die erfindungsgemäße Vorrichtung in einer ersten Ausführungsform, von der Seite gesehen, für den Bereich der erfindungsrelevanten Teile, bei angehobener Stellung des vorderen Tischabschnittes,

Figur 2

eine Darstellung nach Figur 1, bei abgesenkter Stellung des vorderen Tischabschnittes,

Figur 3

eine zweite Ausführungsform, in einer Darstellung entsprechend der Figur 1, wobei zusätzlich ein Greifersystem veranschaulicht ist.

In the figures, the invention is shown for example in two embodiments, without being limited to these. It shows in a simplified representation:

Figure 1

the device according to the invention in a first embodiment, seen from the side, for the area of the parts relevant to the invention, with the front table section in a raised position,

Figure 2

1, with the front table section in a lowered position,

Figure 3

a second embodiment, in a representation corresponding to Figure 1, wherein a gripper system is also illustrated.

Figure 1 shows that the only shown for its front area Table 1 from the rear table section 2 and the front table section 3 is formed. Both table sections have the same width extension (perpendicular to the leaf plane seen) on. The table surfaces 4 and 5 of the two table sections 2 and 3 are arranged horizontally and point Rectangular shape. The front table section 3 is conical tapered, the front tip of the formed wedge is designated by the reference number 6. over an axis 7 are the two table sections 2 and 3 with each other pivotally connected. In the end position swiveled upwards of the front table section 3 forms its table surface 5 with the table surface 4 of the rear table section 2 a horizontal plane. In the shown in Figure 2, pivoted Position of the front table section 3 is the table surface 5 inclined by about 7 ° to the horizontal. In the upper or lower end position, the front table section 3 contacts the rear table section 2 at a distance from axis 7 in points 8 or 9. The front table section 3 can be pivoted by means of of a pneumatic cylinder 10. Its piston rod 11 overlaps a bearing axis 12 on an actuating lever 13, which is approximately perpendicular to the table surface 5 of the front table section 3 oriented and fixed laterally with the front table section 3 connected is. The pneumatic cylinder 10 is with the rear Table section 2 connected so that it corresponds to the movement this table section 2 is moved.

The rear table section 2 is in a carriage, not shown stored, which allow the rear table section 2 and thus also the front table section 3 vertically in the direction of the double arrow A and horizontally in the direction of the double arrow B to proceed.

Finally, the device has a rear stop 14 and a front stop 15. The rear stop 14 is in Movable in the direction of the double arrows A and B, the front one Stop 15 at least in the direction of the double arrow A, advantageous also in the direction of the double arrow B. If necessary the two stops 14 and 15 could also be perpendicular to Leaf level can be moved back and forth. The means to the procedure of the rear table section 2 and the two stops 14 and 15 are not illustrated in detail.

The device shown in the illustration of the figures serves the creation of the cut stack 16 of sheet material and its stacking on one not shown Pallet resting, only partially illustrated stack 17 from sheet-like material to form a total stack. For this is, as can be seen from the illustration of Figure 1, the Table 1 with the front one moved into the raised end position Table section 3 arranged at such a level that the Bottom 18 of the rear table part 2 to a level lies, which is slightly above the surface of the lower stack 17. The table 1 is with the top stack 16 loaded and moved so that the front table section 3 is positioned above the lower stack 18 and its Tip 6 the contact surface arranged perpendicular to the sheet plane 19 of the front stop 15 almost contacted. Then it will the rear stop 14 in the direction of the front stop 15 moves, whereby the upper stack 16, as shown in FIG. 1, puts on the front stop 15. If necessary, you can still designed according to the rear stop 14, lateral Stops, thus effective stops perpendicular to the sheet plane be provided, the stack 16 also in the lateral direction align.

As shown in FIG. 1, the upper stack 16 that has been created lies positioned between the two stops 14 and 15 on the horizontal table surface of table 1. Outgoing of this, as can be seen from the illustration in FIG. 2, the front table section 3 by means of the pneumatic cylinder 10 swung down until the lower anchor point is reached, with which the fall height a of the stack 16 in the area of the tip 6 of the front table section 3 reduced. With lowered Position of the front table section 3 forms its underside 20 a plane with the horizontal underside 18 of the rear table section 2. There is a small distance between the bottom 20 and the surface 21 of the bottom Stack 17, which allows the table 1 under the top stack 16 pull out without the table 1 the lower stack 17th contacted. The rear stop 14 prevents the upper stack 16 is taken from the retracting table 1. The return direction of the table 1 is shown in the Figure 2 illustrates with the reference number B '.

The embodiment according to FIG. 3 shows the additional one Use of a gripper system 22 in the area of the front Stop 15. This is according to the directions of movement the stops 14 and 15 movably supported in the carriage. It has one connected to the movable gripper carrier 23 lower gripper jaw 24 and one in a bearing plate 25 of the Gripper carrier 23 mounted pneumatic cylinder 26, the in Piston rod 27 movable in the direction of the gripper jaw 24 takes up further gripper jaw 28. So that the gripper system 25 the can take top stack 16 in the front area, that is front end of the front table section 3 with a recess 29 provided. For gripping the upper stack 16, the Gripper jaw 24 in the between the two stacks 16 and 17th formed space retracted and in the region of the recess 29 the underside of the upper stack 16 created and the upper Gripper jaw 28 pressed on top of the stack 16. When swiveling of the front table part 3 in that shown in Figure 2 Position, the gripper system 22 is pivoted synchronously and in the pivoted position of the front table section 3 the table moved back.

If the upper stack 16 consists of a large number of partial stacks, especially those made by cuts perpendicular to the sheet plane are generated, the upper stack 16 is stripped off exclusively by means of the rear stop 14. Are the Partial stack of the upper stack 16 only by cuts parallel to Sheet level formed, this stack can be held back by a gripper system 22 can be made, which is a plurality of parallel Gripper jaws 24 and upper gripper jaws 28 or a continuous one has upper gripper jaw 28 and accordingly many recesses 29 are provided for the gripper jaws 24.

Claims (11)

1. Device for feeding and storing cut stacks of leafshaped objects for the purpose of forming total stacks, comprising a table (1) which is movable vertically as well as horizontally movable forward and back a device for feeding the cut stack on a table, as well as a device for fixing the cut stack during retraction of the table for the purpose of storing the cut stack, and the table is designed to be conically narrowing at the front, characterised in that the table (1) comprises a front (3) and a rear table section (2) for accommodating the cut stack (16), and the front table section (3) is pivotally hinged to the rear table section (2) and pivotal by means of a load (10) between two end positions (8, 9) in such a manner that in the first end position (8) the table surfaces (4, 5) of the two table sections (2, 3) form a horizontal plane and in the second end position (9) the table surface (5) of the front table section (3) is pivoted relative to the table surface (4) of the rear table portion (2).
2. Device according to Claim 1, characterised in that the front table section (3) is pivotal relative to the rear table section (2) between two stops (8, 9).
3. Device according to one of Claims 1 to 2, characterised in that the front table section (3) is pneumatically pivoted.
4. Device according to one of Claims 1 to 3, characterised in that the table surface (5) of the front table section (3) is pivotal from the horizontal by an angle of less than 10°.
5. Device according to one of Claims 1 to 4, characterised in that the bottom sides (18, 20) of the two table sections (2, 3) form a horizontal plane in the pivoted position of the front table section (3).
6. Device according to one of Claims 1 to 5, characterised in that a rear stop (14) is positioned in the forward movement direction of the table (1) behind the cut stack (16).
7. Device according to one of Claims 1 to 6, characterised in that a front stop (15) is positioned in the forward movement direction of the table (1) in front of the cut stack (16).
8. Device according to one of Claims 1 to 7, characterised in that a grabbing system (22) is positioned in the forward movement direction of the table (1) in front of the cut stack (16).
9. Device according to Claim 8, characterised in that the front end of the front table section (3) has at least one cutout (29) for receiving at least one grabbing jaw (24) of the grabbing system (22).
10. Device according to one of Claims 1 to 9, characterised in that the front table section (3) is in the area of its table surface (5) provided with air nozzles.
11. Device according to one of Claims 1 to 10, characterised in that front table sections (3) of different narrowing are connectable to the rear table section (2).

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