EP1223137B1 - Device for the superposing of sheets in a packet - Google Patents

Abstract

Film stacks (7) on pallets (6) are moved onto storage tables on tiered shelves (29) in a stand (1) and aligned according to visible light and/or laser projected marks. Film stacks (7) on pallets (6) are moved onto storage tables on tiered shelves (29) in a stand (1) and aligned according to visible light and/or laser projected marks. A suction bar (2) on telescopic rails (14) moves horizontally and vertically to take a film (8) from a stack edge and move it onto a transfer unit (3) with suction belts (18) for further movement towards a placing machine (5). Film is lifted from the transfer unit edge by a second vertically moveable suction bar (4), then moved by a carriage (32) on rails to a position above a placing table (20).

Description

The invention relates to a device for the folding of films into a layer package according to the preamble of patent claim 1.

Such devices are used in systems such as short-cycle coating systems or coating systems with single or multi-day presses for tempering of carrier plates such as chipboard, fiber or similar wood-based panels, with films / papers possibly in several layers to laminate plates or on support plates, one or both sides , applied to decorative panels are pressed. In these systems with extremely short cycle times in the presses, the rapid consolidation of the layer packages (press packs) is of paramount importance and the most important problem to be solved by the technology.

DE 198 39 924 A1 discloses a device for removing films from a film stack in a stacking station and for removing the removed Films have become known in a Zusammenlegestation, which has a similar structure, as described in the preamble of the present application. This device is characterized in that the transfer platform has on both sides guide rails with Saugleistenantrieben for on the transfer platform reciprocable squeegee that form the transfer platform with the guide rails, the Saugleistenantrieben and the squeegee höhenverschwenkbare acceptance and transfer unit and that the pivot bearing axis for the acceptance and transfer unit is located on the side of the collator.

A device produced with these features is not fast enough from the time of picking up to placing a foil in the collapsing station for some machines. A disadvantage is also the abrasive transfer of the films on the transfer platform, with the injury of the surfaces is not entirely avoidable. It is also disadvantageous that the squeegee over the total length of the transfer platform of about 3-4 m depending on the film width and must go back.

The invention is based on the object to provide a device with which the recording, transferring and depositing a film in less time than with the known from the prior art devices is possible and also to allow a gentle and accurate alignment when manipulating the slides.

The solution of this problem is characterized by the characterizing part of claim 1
the classification of lying on protective plates or transport pallets film stack with a transport device, such as a forklift in several floors of a multi-level rack, each floor is equipped with a storage table on which a transport device, the film stack projected longitudinally and transversely on the table, visible Aligned light and / or laser markings aligned,
the inclusion of a film from the edge of a film stack with a short way, in both directions telescopically extendable rails with their own drive, horizontally movable and raised and lowered squeegee, wherein each sucked by suction film can be delivered by means of the squeegee to a transfer device, the with her on the multi-level shelf adjacent side to the appropriate height of each floor and film height by lifting drive is raised and lowered executed and consists of a base frame in which a transfer table is mounted with several circumferentially guided endless vacuum suction for the further transport of the films and by taking over the slides of the transfer device by means of a second squeegee for further transport to an adjacent laying station, the lifting and lowered trained suction strip each sucks a film from the edge of the transfer table, lifts and pulls with a carriage in rails of a Fahrportals on a Legetisch and on it.

Within these measures and features, it is expedient if the storage tables are slidably disposed in the floors of the multi-level rack in their longitudinal and transverse axes by means of actuators and positioning units automatically after the film longitudinal and Folienquerkanten using fixed built-in light sensor or manually in jogging to visible light - or laser markings are aligned. For the collection of the transport pallets on the delivery tables also chain conveyor can be provided. Instead of chain conveyors, two-part roller conveyors are also conceivable.
To align the slides during the transfer to the laying table and the transfer table in the base frame controlled by light scanners or photocells or cameras by means of actuators and positioning units can be made longitudinally and transversely displaceable.
As part of the inventive solution, the device for further transport of the films from the transfer device to the laying table is that the unaligned film after its longitudinal edge on the Legetisch is automatically aligned by a trolley on which the squeegee is attached, is carried out transversely movable over one or two positioning units to the position of the drive and transverse to its transverse edge by the squeegee on the trolley with a positioning longitudinally adjustable.

• Da für das Anheben der Folien vom Folienstapel und das Ablegen der Folien am Legetisch jeweils eine eigene Saugleiste vorgesehen ist, sind kürzere Taktzeiten möglich, weil die erste Saugleiste nur eine Wegstrecke von 300 bis 400 mm vom Folienstapel bis zu den Vakuumsaugbändern zurücklegen muss und nicht die ganze Fahrstrecke über den Übernahmetisch mitfahren muss.
• Die kürzere Taktzeit wird auch dadurch ermöglicht, dass die erste Saugleiste bereits Vorbereitungen zum Anheben der nächsten Folien durchführen kann, wie Zurückfahren zum Folienstapelrand, Absenken der Saugnäpfe auf die Folie und das Unterblasen der abzuhebenden Folie, während die vorlaufende Folie zur zweiten Saugleiste transportiert und damit über den Legetisch gefahren wird.
• Während des Überführens der vorlaufenden Folie über den Übernahmetisch mit den Vakuumsaugbändern zum Legetisch, besitzt die erste Saugleiste einen Zeitüberschuss, der mit mehr Zeit für ein ausreichendes Unterblasen der nächsten abzuhebenden Folie für eine zuverlässige Trennung genutzt werden kann, was sich insbesondere vorteilhaft bei der Handhabung von schwierigen Folien bemerkbar macht.
• Eine kürzere Manipulierzeit ergibt auch das Umschalten der Folienentnahme von den Folienstapeln zwischen den Etagen untereinander, weil die erste Saugleiste nicht die Fahrbewegung der vorlaufenden Folie zum Legetisch mitfahren muss.
• Auch die Höheneinstellung der ersten Saugleiste auf den sich in der Höhe ändernden Folienstapel kann sehr einfach durch den eigenen Stellmotor unabhängig von der Verstellung des Übernahmetisches erfolgen. Dazu ist keine zusätzliche Winkelkorrektur der ersten Saugleiste erforderlich und ein sicheres Aufnehmen der Folien durch eine optimale Positionsanpassung der Saugnäpfe gewährleistet.
• Ein schonender Folientransport ergibt sich dadurch, dass die überführten Folien durch die vorgesehenen Vakuumsaugbänder getragen und nicht über einen Tisch schleifend gezogen werden.
• Ein genaues Manipulieren und Ausrichten der Folien innerhalb der erfindungsgemäßen Vorrichtung, insbesondere beim Ablegen auf dem Legetisch, wird durch die im Mehretagenregal, im Grundrahmen für den Übernahmetisch und für den Fahrwagen der zweiten Saugleiste vorgesehenen Positioniereinheiten mit Stellmotor erreicht.

Compared with the known state of the art, the device according to the invention provides the following advantages:

• Since a separate suction strip is provided for lifting the films from the film stack and the filing of the slides at the laying table, shorter cycle times are possible because the first squeegee must travel only a distance of 300 to 400 mm from the film stack to the Vakuumsaugbändern and not the Entire driving distance must go along the takeover table.
• The shorter cycle time is also made possible by the fact that the first squeegee can already carry out preparations for lifting the next films, such as returning to the film stack edge, lowering the suction cups on the film and underlapping the film to be lifted, while the leading film transported to the second squeegee and thus is driven over the Legetisch.
• During the transfer of the leading foil over the transfer table with the vacuum suction bands to the laying table, has the first squeegee a time surplus, which can be used with more time for a sufficient underblowing of the next film to be removed for a reliable separation, which is particularly advantageous in the handling of difficult films noticeable.
• A shorter Manipulierzeit also results in the switching of the film removal of the film stacks between the floors with each other, because the first squeegee does not have to ride the driving movement of the leading foil to Legetisch.
• The height adjustment of the first squeegee on the height-changing film stack can be done very easily by the own servo motor independently of the adjustment of the transfer table. For this purpose, no additional angle correction of the first squeegee is required and ensures a secure recording of the films by an optimal position adjustment of the suction cups.
• Gentle transport of the film results from the fact that the transferred films are carried by the intended vacuum suction belts and are not dragged across a table.
• Accurate manipulation and alignment of the films within the device according to the invention, in particular when placed on the laying table, is achieved by the positioning units provided in the multi-level rack, in the base frame for the transfer table and for the carriage of the second squeegee.

Further advantageous measures and embodiments of the subject matter of the invention will become apparent from the dependent claims and the following description with the drawing.

Figur 1

Die Vorrichtung gemäß der Erfindung in Seitenansicht und

Figur 2

die Vorrichtung nach Figur 1 im Grundriss.

Show it:

FIG. 1

The device according to the invention in side view and

FIG. 2

the device of Figure 1 in plan view.

The drawing in FIGS. 1 and 2 shows the device for separating, aligning, combining and transporting sheet-like coating materials. As coating materials, decorative papers (Japanese papers), melamine-resin-impregnated papers, papers impregnated with phenolic resin, veneers, PVC films or laminates, hereinafter referred to as films 8 for short, can be used. As support plates MDF, chip, OSB or plywood panels (not shown) in the laying station 5 with the films 8 one or both sides are merged. The device consists in its main parts of a Mehretagenregal 1, a squeegee 2 for separating the sheets 8, a transfer device 3, a second squeegee 4 and the laying station 5. The multi-level shelf 1 is based on a frame 9, the laying table on a frame 13 and the laying station 5 on the frame 26. The loading of the floors 29 of the multi-storey rack 1 can with a Forklift 28 or other suitable transport device. Each floor 29 of the multi-level rack 1 is preferably equipped with a storage table 10, on which the film stack 7 are abandoned with a forklift 28. The film stacks 7 lie on protective plates or transport pallets 6. The film stacks 7 are parked on the delivery table 10, preferably in the longitudinal and transverse direction for visible light crosses, points of light or laser light lines by a forklift 28 or by a motor drive with servomotors 15 of the movable storage table 10 aligned by two motors on the longitudinal axis and a motor on the transverse axis. This makes it possible to align the longitudinal film edge a and transverse film edge b of the film stack 7 automatically with the help of permanently installed light scanner or manually in inching operation for visible light crosses, light points or laser light lines.
The loading of the multi-level rack 1 can also be done with another transport device such as a roller conveyor or the like, each floor 29 of the multi-storey rack 1 equipped with a roller or chain conveyor, on which the film stack 7 are transferred to the transport device. The film stack 7 are also on Schonplatten or transport pallets 6. The film stack 7 can be aligned by two-part roller and chain conveyor. By the foil longitudinal edge a automatically with the help of permanently installed light scanners or manually in the jogging mode for visible light crosses, light spots or Laser light lines is aligned, or by chain conveyors are built on sliding platforms.
This makes it possible to align the longitudinal foil edge a and transverse foil edge b by means of two servo motors on the longitudinal axis XX and a servomotor 15 on the transverse axis automatically with the help of permanently installed light scanner or manually in jogging for visible light crosses, light points or laser light lines. With 27 the direction of the device is displayed.
The separation of the foils 8 from a multilayer rack 1 provided and pre-directed film stacks 7 by a raised and lowered and horizontally movable squeegee 2. The squeegee 2 is mounted between multi-level rack 1 and the transfer device 3 on a guide post 35 and in a running rail 14 , It is motorized or pneumatically vertically and horizontally movable, wherein the running rail 14 is additionally telescopically extendable in both directions, to drive both over the edge of the film stack 7 or over the beginning of the transfer device 3 and to be vertically movable on the guide column 35 , With the help of a traction drive (not shown), the squeegee 2 is moved over the film stack edge. It is then lowered onto the film stack 7. On the squeegee 2, a number of suction cups 11 is mounted, which are evacuated via a vacuum generator, for example, vacuum pump, blower or suction nozzles according to the Venturi principle, and thus suck a film 8. The top sheet 8 is at subsequent upstroke lifted from the pile. In order to properly separate the film 8, air is blown along the longitudinal edge between the raised film 8 and the films remaining on the film stack 7. The nozzles are preferably mounted on the squeegee 2. If the film 8 is released in this way from the film stack 7, it is pulled across until over the edge of the transfer device 3 and transferred by venting the vacuum system to the transfer table 17 of the transfer device 3.
In order to ensure an interruption-free production or to separate 8 alternately between two transport pallets 6 from the multi-tier shelf 1, the squeegee 2 preferably with a lifting drive on the guide column pivotal movement of the transfer device 3 or an additional motor or pneumatic lifting movement to the height position of corresponding floor 29 are brought.

The transfer device 3 consists of a base frame 16, which is one or both sides lift and lowered by lifting drives 12 executed. As a result, the base frame with its leading edge can be adapted to the transfer height of the squeegee 2 and / or to the transfer height of the squeegee 4. In the base frame 16 of the transfer device 3 is a transfer table 17 with a table surface of the removal position in height and angle of the squeegee 2 and the discharge position in height and angle of Suction strip 4 by means of the acceptance angle adjustment 21 is customizable. On the table surface of the transfer table 17 run several vacuum suction 18, which are provided with holes 31 for the purpose of sucking the film 8 to be transferred. To transport the film 8 suction boxes (not shown) are arranged under the conveyor belts in a suitable manner, which are evacuated via vacuum generator. The film 8 is by means of circulating around the transfer table 17 vacuum suction 18 of the squeegee 2 with automatic alignment of the film. 8 transported to the squeegee 4 for the purpose of transfer. The film 8 is aligned by 16 light sensors, photoelectric sensors or cameras and three motorized positioning motors 24 are mounted by means of actuators 19 in the base frame. The film 8 is aligned at its longitudinal and transverse edges a and b, by the transfer table 17 is moved longitudinally and transversely in the base frame 16 by the three motor-driven positioning units 24. The position of the film 8, the film edges a and b, the alignment marks or the position of the decor print is detected by the light sensors, light barriers or cameras and reported to the controller. The control regulates or controls the three motor-driven positioning units longitudinally and transversely so that the film 8 can be transferred aligned in an angle, decor, and edge direction or according to cut marks on the suction strip 4. The film 8 can also be transported without alignment to the squeegee 4 for the purpose of transfer to the laying table 20, if they are during the Placed in the laying station 5 is aligned. The shape of the transfer device 3 is chosen so that the resulting from the height adjustment to the squeegee 2 and / or squeegee 4 angle of rotation is compensated for the 90 ° position of the suction cups 11 and 23 of the squeegee 2 or 4.

To take over a film 8 from the transfer table 17 for transport to the laying station 5 and for placing on the laying table 20, the second suction strip 4 is motorized on a driving portal 25 movable and motor or pneumatic vertically movable. With the help of the traction drive 22, the squeegee 4 is moved over the film 8 on the edge of the transfer table 17 and then lowered onto the film 8. As with the first squeegee 2, the film 8 is sucked and lifted by vacuum generator and suction cups 23. At this time, the suction boxes are ventilated in the base frame 16 and thus release the film 8 for further transport. The suction bar 4 pulls the film 8 with automatic alignment on the laying station 5 and places them here on the laying table 20. For this purpose, the squeegee 4 lowers on the laying table 20, the vacuum system is vented and the squeegee 4 rises upward in the starting position. In unausrichtereter transfer of the film 8, is aligned with the longitudinal edge a by the squeegee 4 is moved over one or two positioning units 24 for the longitudinal edge a to the position of the traction drive 22. The positioning units 24 for the orientation of the longitudinal edge a are attached to a carriage 32, which is moved transversely by the drive 22 attached. The film transverse edge b is aligned by the suction strip 4 is moved along the carriage 32 with a positioning unit 24 along. The position of a foil edge a or b is detected by light scanners, light barriers or cameras, which are arranged stationary or moving, and reported to the controller. The control regulates or controls the motor-driven positioning units 24 longitudinally and transversely so that the film 8 can be transferred to the correct position in the laying station 5 on the laying table 20. If it is detected by sensors (not shown) that the film 8 has already been transferred to the second squeegee 4 with the correct edging, no further alignment of the film 8 takes place on the way to the laying station 5. For this purpose, the squeegee 2 descends to the laying station 5, the Vacuum system is vented, while the film lays down 8 on the Legetisch 20 and the squeegee 2 lifts upwards back to the starting position.

LIST OF REFERENCE NUMBERS

1.

Multi-floor shelf

Second

squeegee

Third

Transfer device

4th

squeegee

5th

laying station

6th

pallet

7th

film stack

8th.

films

9th

Rack for multistory shelf 1

10th

Storage table for transport pallet 6

11th

Suction cups on squeegee 2

12th

Lifting drive for transfer device 3

13th

Rack for Legetisch 20

14th

Running rail for squeegee 2

15th

Servo motors on multi-level rack 1

16th

base frame

17th

transfer table

18th

Vakuumsaugbänder

19th

Actuators to transfer device 3

20th

Legetisch

21st

Removal angle adjustment for transfer device 3

22nd

Travel drive for carriage 32

23rd

Suction cups for squeegee 4

24th

Positioning units for depositing table 10, transfer table 17, squeegee 4

25th

Driving portal for carriage 32

26th

frame

27th

working direction

28th

Transport device (forklift)

29th

Floors

30. 31.

drilling

32nd

trolley

33. 34. 35.

Guide pillar for rail 14

a, b

film edge

X X

longitudinal axis

Y-Y

transverse axis

Claims (8)

1. An apparatus for folding foil into layered stacks in a laying station (5), comprising a multi-level shelf (1) for the stacks of foil and devices for drawing off the foils from the stacks of foil and transferring the same to the laying station (5) and transport devices for introducing the stack of foil into the multi-level shelf (1), characterized by

   - a transport device (28) for sorting stacks of foil (7) resting on protective boards or transport pallets (6) into several levels (29) of the multi-level shelf (1), with each level (29) being equipped with a delivery table (10), and in each level (29) visible light and/or laser markings can be projected onto the delivery table for aligning and depositing the stacks of foil (7) in the longitudinal and transverse direction by the transport device;

   - a first suction strip (2) for receiving a foil (8) from the edge of a stack of foil (7 or 7'), with the first suction strip (2) being horizontally displaceable over a short path with its own drive and being liftable and lowerable and being attached to running rails (14) which can be extended in a telescopic manner in both directions;

   - a transfer device (3) to which the foil (8) received by means of suction can be supplied by means of the first suction strip (2), which transfer device (3) is provided with a liftable and lowerable configuration by means of a lifting drive (12) with its side adjacent to the multi-level shelf (1) to the respective height of the respective level (29) and foil height, and consists of a base frame (16) into which is suspended a take-up table (17) with several revolving guided endless vacuum suction bands (18) for the further transport of the foils (8), and

   - a second suction strip (4) for receiving the foils (8) from the transfer device (3) and for further transport to the adjacent laying station (5), which second suction strip (4) is provided with a liftable and lowerable configuration and is displaceable with a carriage (32) in rails of a driving portal (25) over a laying table (20) in such a way that it is capable of sucking up a foil (8) each from the edge of the take-up table (17), lifting up the same and pulling the same over the laying table (20) and depositing it thereon.
2. An apparatus according to claim 1, characterized in that the delivery tables (10) in the levels (29) are arranged in a displaceable manner in their longitudinal and transversal axes (X-X, Y-Y).
3. An apparatus according to the claims 1 and 2, characterized in that chain conveyors are arranged for drawing in the transport pallets (6) onto the delivery tables (10).
4. An apparatus according to claim 1, characterized in that the levels (29) are equipped with bipartite roller or chain conveyors for receiving and depositing the transport pallets (6), with the longitudinal edges (a) of the foils and the transverse edges (b) of the foils being alignable in an automatic manner with the help of fixedly installed light scanners or manually in keying operation according to visible light or laser markings.
5. An apparatus according to the claims 1, 2 and 3, characterized in that the displaceable delivery tables (10) can be aligned by means of two servomotors (15) on the longitudinal axis (X-X) and by means of a servomotor (15) on the transverse axis (Y-X) via positioning units (24) automatically according to the longitudinal or transverse edges (a, b) of the foils with the help of fixedly installed light scanners or manually in keying operation according to visible light or laser markings.
6. An apparatus according to claims 6 and one or several of the claims 2 to 5, characterized in that the foil (8) resting on the take-up table (17) can be aligned longitudinally and transversally with the take-up table (17) in the base frame (16).
7. An apparatus according to claim 6, characterized in that the take-up table (17) in the base frame (16) is displaceable in a longitudinal or transversal way controlled by means of servomotors (19) and positioning units (24) by light scanners or light barriers or cameras.
8. An apparatus according to claims 1 and one or several of the claims 2 to 7, characterized in that the non-aligned or longitudinally or transversally aligned foil (8) can be aligned automatically according to its longitudinal edge (a) over the laying table (20), such that a carriage (32) to which the suction strip (4) is fastened is provided with a transversally displaceable configuration via one or two positioning units (24) to the position of the traveling mechanism (22), and according to its transverse edge (b) in such a way that the suction strip (4) on the carriage (32) is provided with a positioning unit (24) in a longitudinal adjustable manner.

Images