EP1196344B1 - Method and device for changing sheet stack pallets - Google Patents

Method and device for changing sheet stack pallets Download PDF

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Publication number
EP1196344B1
EP1196344B1 EP00940263A EP00940263A EP1196344B1 EP 1196344 B1 EP1196344 B1 EP 1196344B1 EP 00940263 A EP00940263 A EP 00940263A EP 00940263 A EP00940263 A EP 00940263A EP 1196344 B1 EP1196344 B1 EP 1196344B1
Authority
EP
European Patent Office
Prior art keywords
sheets
separating
stack
jaw
separating jaw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00940263A
Other languages
German (de)
French (fr)
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EP1196344A1 (en
Inventor
Robert Deutschle
Norbert Rilitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ECH Will GmbH and Co
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ECH Will GmbH and Co
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Filing date
Publication date
Application filed by ECH Will GmbH and Co filed Critical ECH Will GmbH and Co
Publication of EP1196344A1 publication Critical patent/EP1196344A1/en
Application granted granted Critical
Publication of EP1196344B1 publication Critical patent/EP1196344B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/32—Auxiliary devices for receiving articles during removal of a completed pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/422—Handling piles, sets or stacks of articles
    • B65H2301/4225—Handling piles, sets or stacks of articles in or on special supports
    • B65H2301/42256—Pallets; Skids; Platforms with feet, i.e. handled together with the stack
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/426—Forming batches
    • B65H2301/4262—Forming batches by inserting auxiliary support as defined in B65H31/32
    • B65H2301/42622—Forming batches by inserting auxiliary support as defined in B65H31/32 and using auxiliary means for facilitating introduction of the auxiliary support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/35—Other elements with suction surface, e.g. plate or wall

Definitions

  • the invention relates to a method and a device for changing Pallets for sheet stacks with continuous delivery of sheets to the stacking point. Furthermore, the invention relates to a release jaw for a such device.
  • a known method for making such a pallet change in Continuous promotion of bow to the stacking point is known from DE 36 16 470 C2 known.
  • the method disclosed there also shows the closest State of the art.
  • a separating finger of the in the conveying direction of the arc back side of the sheet stack between the first sheet pile and the subsequently fed bow inserted.
  • This separation finger is now lowered more slowly than the first sheet stack, so that a gap between the nachge elaborateten, lying on the release finger Forming the bow and the first sheet pile.
  • This gap is now a first Jaw inserted.
  • the separating finger from the gap taken out again, to the top of the pile of nachge redesignten bow up and there again from the back side between the next subsequent sheet and the stack of sheets pushed on the first jaw.
  • the release finger is lowered again slower than the first jaw with the stack on it, so that there is another, second gap between the first jaw and the one located on the separating finger Bow forms. In this second gap, a second jaw is inserted. Now it will be between the first and the second jaw Sheet pile sandwiched between the jaws by the jaws be moved towards each other.
  • the pallet is carried away with the first sheet pile.
  • a new pallet is placed under the auxiliary table.
  • the Auxiliary table again from the gap below the held by the jaws Bow pile pulled out, so that of the jaws held stack of sheets on the arranged below the auxiliary table pallet can be lowered.
  • the clamping of the solved by the jaws clamped sheet pile by the distance the jaws is enlarged again to each other.
  • This object is achieved by a method according to claim 1 or by a device according to claim 11 or a separating jaw according Anpruch 12th solved.
  • the advantages of the invention are, in particular, that due to the invention an entrapment of a stack of bows no longer necessary is. Rather, due to the invention, the sheet is sucked to the separating jaw, so that no force on the sheet pile or on the single sheet is necessary in the stacking direction. Beyond that thanks to the invention, the jaws superfluous, which is a considerable simplification of the method and also according to such a method represents working device.
  • the invention takes advantage of a special property of a sheet pile, the due to the precision of today's cutting devices on its side surfaces practically forms a closed, almost smooth surface. These The fact makes it possible to suck in such a stack of sheets from the side.
  • a preferred embodiment of the method according to the invention is characterized in that in the method according to claim 1 the Generating the gap between the first sheet stack and the following Arc is obtained by the separating finger slower against the Stacking direction of the first
  • Sheet pile is lowered as the first sheet pile itself. This way creates the gap in a simple way.
  • a further preferred embodiment of the method according to the invention has the step, the same time with or after the introduction of the release jaw in the is taken from the gap generated by the separating finger gap of the separating finger from the gap.
  • This embodiment allows, for example, that the separating finger is not in a recess in the separating jaw must be performed. Alternatively, it is possible to guide the separating finger in a recess of the separating jaw, so that the Separating jaw can be pushed into the gap, while also the separating finger still in the gap.
  • a particularly preferred embodiment of the invention is characterized that provided in the separating jaw the subsequent arc facing openings are through which the subsequent bows are sucked by this Openings gas, preferably air, is sucked.
  • the Separating jaw for example, be designed as a hollow body, in which hollow body a vacuum is generated. The hollow body is then next to the openings in his Wall also provided with openings through which the hollow body to the Suction side of a fan or other vacuum source is connected.
  • the separating jaw sucks the bottom arch at its bottom.
  • this floor is additionally fixed.
  • the invention is characterized in that in one already in the effective range of Trennbacke from subsequent sheets formed beginning of a new stack of Back of this new stack is sucked by the release jaw. Furthermore The suction of the back of the new stack can also cumulatively to that Suction of the bottom provided in the area of the back of the new stack become.
  • the latter embodiment promises additional and maximum fixation of the new stack on the separating jaw thus working.
  • the release jaw is included preferably formed as an angle.
  • the separating jaw preferably has two at right angles disposed surfaces, each having openings through which a negative pressure in the region of these surfaces is generated. The one surface is arranged parallel to the plane of the arc, while the other surface is arranged parallel to the back of the new stack.
  • Another preferred embodiment of the method according to the invention is characterized in that during the introduction of the auxiliary table at least one band arranged on its surface is activated in such a way that the relative velocity between the band and the lowest bow of the subsequent arc is substantially equal to zero. This way too when introducing the auxiliary table in the through the inventive release jaw formed gap markings at the bottom of the new stack or at the Underside of the bottom arc of the post-conveyed bow avoided.
  • a particularly advantageous and particularly preferred embodiment of Invention is characterized in that during the introduction of the auxiliary table Gas, preferably air, is blown against the underside of the belt. To this Way, the friction between the auxiliary table and the belt is reduced. It is particularly preferred if that on the surface of the auxiliary table arranged band to avoid a relative speed of auxiliary table surface and bottom following bow is formed as a cloth.
  • the auxiliary table Gas preferably air
  • Fig. 1 shows schematically a device 1 for changing pallets for Sheet stack with continuous delivery of sheets to the stacking point.
  • the Device 1 has a feed belt 2. Be on the conveyor belt 2 Bow 4 promoted to a stacking point 6.
  • the stacking point 6 is in the conveying direction limited by a supported as a stop for the stacking point 6 bow front-end adjuster 8.
  • the front-end 8 opposite the Stacking point 6 through a schematically illustrated, wall-like rear Installer 10 limited.
  • the front-end 8 and the rear-end 10 run vertical.
  • the feed belt 2 runs horizontally. Down is the stacking point 6 bounded by a horizontally arranged pallet 12.
  • the pallet 12 is - like indicated by the arrow 14 - lowered down to ermögüchen that the Top edge 16 from already stacked on the pallet 12 sheet 4 always in the remains the same height, i. relative to the conveying plane of the feed belt 2 remains unchanged.
  • the lowering of the pallet 12 required lowering are not shown in the drawing.
  • the front-end 8 has through holes 18.
  • the drill holes 18 connect the front 20 of the front-end 8 with a back 22 of the At the back 22 is around the area in which the Through holes 18 open a cavity 24 is provided. In the cavity 24 is by a pumping means, not shown, a negative pressure generated.
  • the rear 10 does not have in the side views shown in the figures visible recesses through which a separating finger 26 and a separating jaw 28th reach the area of the already stacked on the pallet 12 sheet stack 30 can.
  • the separating finger 26 is by means of a schematically indicated drive 32nd emotional.
  • the separating finger 26 can both in the direction indicated by the arrow 14 Direction down, as well as in the opposite direction, as well as in Direction to the sheet stack 30 to be moved.
  • the separating finger 26 can be moved independently of all other parts of the device 1.
  • the Separating finger 26 has a base plate 34, which in the one shown in FIG Basic position of the separating finger 26 runs parallel to the rear of the organizer 10.
  • the actual separating finger 26 forming partition plate 38 is attached.
  • the distance shown in the figures, the sheet 4 at the Stacking point 6 or in the sheet stack 30 only to facilitate understanding the drawing is used.
  • the distance is the arc 4 equal to each other 0.
  • the release jaw 28 is formed as well as the separation finger 26 as an angle. Also the separating jaw 28 has a parallel to the rear 10 runner Base plate 40 on. On the base plate 40 is on the feed conveyor the second facing away from a nose 42 is arranged.
  • the nose 42 runs first from the base plate 40, starting perpendicular to the base plate 40, wherein the nose 42 at its front end is rounded.
  • In the perpendicular to the base plate 40th extending portion of the nose 42 are through holes 46 in the wall 48th the nose 42 provided. These holes 46 in the wall 48 of the nose 42 connect the surface 44 of the nose 42 with a cavity 50 within the Separating jaw 28.
  • a negative pressure can be generated, so that the openings 46 in the wall 48 air from the outside space into the cavity 50 is sucked.
  • an overpressure producible so that through the holes 46 in the wall 48 of the nose 42 air blown outward.
  • the negative pressure or the overpressure in the cavity 50 is provided by pumping means, not shown.
  • the second cavity 52nd Behind the base plate 40 of the separating jaw 28 is a second cavity 52nd intended.
  • the second cavity 52 can also be put under negative pressure. This Underpressure can be accomplished by the same pumping means, including the Vacuum in the cavity 50 provide. With the help of negative pressure in the cavity 52 can be at the surface 54 of the base plate 40 of the Trennbacke 28 generate negative pressure by passing through holes 56 in the Base plate 40 of the separating jaw 28 air from the outside space in the cavity 52nd is sucked in.
  • Fig. 1 shows a schematically illustrated auxiliary table 58th Der Auxiliary table 58 runs parallel to the feed belt 2.
  • auxiliary table 58 On the auxiliary table 58 is a schematically shown cloth 60 movably mounted.
  • the auxiliary table 58 leaves in the direction indicated by the arrow 62 in parallel to the direction in the Sheet stack 30 stacked sheet 4 method.
  • Simultaneously with the procedure of Auxiliary table 58 in the direction of arrow 62 can be the cloth with opposite, in terms of magnitude, however, same speed in the direction of arrow 64 on the Auxiliary table 58 moved.
  • the combination of auxiliary table 58 and cloth 60 can be thus move such that a point x on the cloth 60 during the process the auxiliary table 58 remains fixed in space.
  • Other functions of the auxiliary table 58 will be with reference to the following figures.
  • Fig. 1 shows the ground state of the device 1 and the inventive Process.
  • this ground state is initially controlled by a not shown control device a predetermined number of sheets 4 to a Sheet stack 30 stacked on the pallet 12. This is done by a broken one Stream of sheet 4 by means of the feed belt 2 to the stacking point. 6 is promoted against the front end 8.
  • the pallet 12 through Lowering means not shown lowered to the front edge 16 relative to Conveyor plane of the feed conveyor 2 to leave unchanged.
  • Both in the cavity 50 and in the cavity 52 There is neither a negative pressure nor an overpressure. In that shown in FIG. 1 Embodiment is also not in the cavity 24 of the front-end 8 Negative pressure generated.
  • the separating finger 26 thus limited as shown in FIG. 2 the finished first sheet stack 30 upwards and separates the subsequent sheet 4 of the finished first sheet stack 30.
  • the separating finger 26 is parallel to the lowering of the pallet 12 (arrow 14), as indicated by the arrow 66, lowered.
  • the separating finger 26 forms a gap 68 shown in FIG. 3 between the first sheet stack 30 and farther from the feed belt 2 nachge kitten sheet 4, which arrive at the stacking point 6. In the gap thus formed 68 between the sheet stack 30 and the subsequent sheet 4 is the separating jaw 28 inserted.
  • the separating jaw 28 arrives with its base plate 40 in contact with the back 70 of the now stacked new stack from sheet 4, the separation of the finger 26 against the sheet stack 30th were held back.
  • the top 44 of the nose 42 passes with the Bottom 72 of the bottom of the sheet 4 above the separating finger 26 in contact.
  • the separating finger 26 is pulled out of the gap 68, so that results in the state shown in FIG. 4.
  • the separating jaw 28 is parallel to Lowering of the separating finger 26 according to the arrow 66 also lowered (see arrow 74). All other components of the device 1 are still in an unchanged Status.
  • FIG. 6 shows a further method step.
  • the gap 68 between the new Stack 76 and the first sheet stack 30 further enlarged.
  • the gap 68 is maintained with unchanged maintained suppression in the Cavities 50, 52 and 24 of the auxiliary table 58 in accordance with arrow 80 in drive.
  • there especially the negative pressure in the cavity 24 ensures that the bottom 72nd of the lowermost sheet 4 of the new stack 76 not on the auxiliary table 58 and on the backwards running on the auxiliary table counter to the direction of movement 80 Cloth 60 drops.
  • the auxiliary table 58 Simultaneously with the retraction of the auxiliary table 58 in the enlarged gap 68 the auxiliary table 58 according to arrow 84 is lowered parallel to the separating jaw 28, so that Furthermore, it is ensured that the upper edge 16 of the stacked sheet opposite the feed belt 2 remains unchanged.
  • This retraction of the auxiliary table 58 runs according to the Pushing in the auxiliary table 58. Also when pulling out the auxiliary table 58, the cloth 60 is unwound on the auxiliary table 58, that no relative movement between the bottom 72 of the lowermost sheet 4 from the new stack 76th and the cloth 60 is formed.
  • Fig. 9 shows the next step, in which the new pallet 36 to that of the Help table 58 abandoned position shown in FIG. 8 is brought. It means that the distance between the bottom 72 of the lowermost sheet 4 from the new Stack 76 and the new pallet 86 is reduced to a minimum. simultaneously with the approach of the new pallet 86 to the new stack 76 is according to the arrow 88 in FIG. 9, the separating jaw 28 from the gap 68 between the new stack 76 and the new pallet 86 pulled out and the stack 76 on this filed, as shown in Fig. 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)
  • Pile Receivers (AREA)
  • Pallets (AREA)

Abstract

Apparatus for accumulating successive stacks of superimposed sheets on discrete pallets employs a conveyor which delivers a continuous imbricated stream of sheets to a stacking station where a pallet descends with an elevator and gathers a first stack. A separating finger is inserted into the accumulation of sheets at the stacking station at a level above the topmost sheet of the fully grown first stack. The thus obtained gap is increased by lowering the finger at a speed less than that of the elevator, the increased gap receives a positioning member which attracts the lower part of the growing second stack by suction, a table is inserted into the increased gap between the partitioning member and the fully grown stack, the fully grown stack and its pallet are withdrawn from the stacking station and replaced with a fresh pallet, the table and the partitioning member are withdrawn from the stacking station so that the growing second stack descends onto the second pallet, and the above-enumerated sequence of steps is tereupon repeated.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Wechseln von Paletten für Bogenstapel bei ununterbrochener Förderung von Bogen zur Stapelstelle. Ferner betrifft die Erfindung eine Trennbacke für eine derartige Vorrichtung.The invention relates to a method and a device for changing Pallets for sheet stacks with continuous delivery of sheets to the stacking point. Furthermore, the invention relates to a release jaw for a such device.

Derartige Verfahren und Vorrichtungen sind aus dem Stand der Technik bekannt. Dabei werden unter Bogen beispielsweise Einzelbogen aus Papier, Folie, Kunststoff o.dgl. verstanden, die eine flächige Form haben. Unter dem Begriff Bogenstapel werden dabei Ansammlungen übereinanderliegender Bogen verstanden. Unter dem Begriff Stapelstelle wird die Stelle verstanden, an der der Bogenstapel aus den angeförderten Bogen gebildet wird.Such methods and devices are known in the art. Under sheet example, individual sheets of paper, foil, plastic or the like. understood, which have a flat shape. Under the term sheet pile are understood to mean collections of superimposed bows. Under the The term stacking point is understood as the point at which the sheet stack emerges from the funded bow is formed.

In der papierverarbeitenden Industrie werden an sogenannten Sammelstationen einzelne Bogen, die z.B. von einer Schneideinrichtung durch Abschneiden von einer laufenden Bahn gebildet wurden, fortlaufend, d.h. ununterbrochen, zu einer Stapelstelle gefördert und dort zu Bogenlagen oder Bogenstapein übereinander gelegt. Während dieser Ansammlung von Bogen an der Stapelstelle müssen Bogenstapel mit einer definierten Anzahl von Bogen zur Weiterverarbeitung von der Stapelstelle wegbefördert werden. Zumeist werden die Bogenstapel auf Paletten gebildet. Das bedeutet, daß bei dem Wegbefördern des Bogenstapels der Bogenstapel auf der Palette bzw. zusammen mit der Palette von der Stapelstelle entfernt wird. Aufgrund der ununterbrochenen Förderung der Bogen an die Stapelstelle muß dabei die gefüllte Palette entfernt und eine leere Palette an die Stapelstelle gebracht werden, ohne daß die Stapelung des Bogenstapels über Gebühr gestört wird.In the paper processing industry, so-called collection stations are used single sheets, e.g. from a cutter by cutting one running track, continuously, i. continuously, to one Promoted stacking site and there to sheet layers or Bogenstapein one above the other placed. During this accumulation of sheets at the stacking point must Sheet pile with a defined number of sheets for further processing of the sheet Stacking away. Mostly the sheets are stacked on pallets educated. This means that in the removal of the sheet stack of the Stack of sheets on the pallet or together with the pallet from the stacking point Will get removed. Due to the continuous promotion of the bow to the Stacking point must remove the filled pallet and an empty pallet to the Stacking be brought without the stacking of the sheet pile over Fee is disturbed.

Ein bekanntes Verfahren zur Vornahme eines solchen Palettenwechsels bei ununterbrochener Förderung von Bogen zur Stapelstelle ist aus der DE 36 16 470 C2 bekannt. Das dort offenbarte Verfahren zeigt zugleich den nächstliegenden Stand der Technik. Bei diesen bekannten Verfahren wird zunächst eine Anzahl von Bogen an der Stapelstelle zu einem ersten Bogenstapel auf einer ersten Palette gestapelt. Anschließend wird ein Trennfinger von der in Förderrichtung der Bogen hinteren Seite des Bogenstapels zwischen den ersten Bogenstapel und die nachfolgend angeförderten Bogen eingeschoben.A known method for making such a pallet change in Continuous promotion of bow to the stacking point is known from DE 36 16 470 C2 known. The method disclosed there also shows the closest State of the art. In these known methods, a number of Sheet at the stacking location to a first stack of sheets on a first pallet stacked. Subsequently, a separating finger of the in the conveying direction of the arc back side of the sheet stack between the first sheet pile and the subsequently fed bow inserted.

Dieser Trennfinger wird nun langsamer als der erste Bogenstapel abgesenkt, so daß sich eine Lücke zwischen den nachgeförderten, auf dem Trennfinger liegenden Bogen und dem ersten Bogenstapel bildet. In diese Lücke wird nun eine erste Klemmbacke eingeschoben. Anschließend wird der Trennfinger aus der Lücke herausgenommen, erneut an die Spitze des Stapels der nachgeförderten Bogen hochgefahren und dort erneut von der hinteren Seite zwischen die weiter nachfolgenden Bogen und den Bogenstapel auf der ersten Klemmbacke geschoben. Nunmehr wird erneut der Trennfinger langsamer abgesenkt, als die erste Klemmbacke mit dem darauf befindlichen Stapel, so daß sich eine weitere, zweite Lücke zwischen der ersten Klemmbacke und den sich auf dem Trennfinger befindenden Bogen bildet. In diese zweite Lücke wird eine zweite Klemmbacke eingeschoben. Nun wird der sich zwischen der ersten und der zweiten Klemmbacke befindende Bogenstapel zwischen den Klemmbacken eingeklemmt, indem die Klemmbacken aufeinanderzu bewegt werden.This separation finger is now lowered more slowly than the first sheet stack, so that a gap between the nachgeförderten, lying on the release finger Forming the bow and the first sheet pile. This gap is now a first Jaw inserted. Subsequently, the separating finger from the gap taken out again, to the top of the pile of nachgeförderten bow up and there again from the back side between the next subsequent sheet and the stack of sheets pushed on the first jaw. Now, the release finger is lowered again slower than the first jaw with the stack on it, so that there is another, second gap between the first jaw and the one located on the separating finger Bow forms. In this second gap, a second jaw is inserted. Now it will be between the first and the second jaw Sheet pile sandwiched between the jaws by the jaws be moved towards each other.

Daraufhin wird die erste Palette mit dem ersten Bogenstapel unterhalb des von den Klemmbacken eingeklemmten Bogenstapels abgesenkt, so daß sich unterhalb des von den Klemmbacken eingeklemmten Bogenstapels eine Lücke bildet, in die ein Hilfstisch eingefahren werden kann. Nach dem Einfahren des Hilfstisches in die Lücke wird die Palette mit dem ersten Bogenstapel wegbefördert. Anschließend wird eine neue Palette unter dem Hilfstisch angeordnet. Daraufhin wird der Hilfstisch wieder aus der Lücke unterhalb des von den Klemmbacken gehaltenen Bogenstapels herausgezogen, so daß der von den Klemmbacken gehaltene Bogenstapel auf die unterhalb des Hilfstisches angeordnete Palette abgesenkt werden kann. Weiter anschließend wird die Klemmung des von den Klemmbacken eingeklemmten Bogenstapels gelöst, indem der Abstand der Klemmbacken zueinander wieder vergrößert wird. Dabei muß die obere Klemmbacke leicht angehoben werden, da die untere Klemmbacke direkt benachbart zu der leeren Palette liegt. Anschließend kann zunächst die untere Klemmbacke aus der Lücke zwischen der leeren Palette und dem zuvor eingeklemmten Bogenstapel und dann die obere Klemmbacke aus der Lücke oberhalb des zuvor eingeklemmten Bogenstapels herausgezogen werden. Anschließend beginnt der Zyklus von vorne.Then the first pallet with the first sheet stack below the one of the Jaws clamped sheet pile lowered, so that below the from the jaws clamped sheet pile forms a gap in the one Auxiliary table can be retracted. After retracting the auxiliary table in the Gap, the pallet is carried away with the first sheet pile. Subsequently a new pallet is placed under the auxiliary table. Then the Auxiliary table again from the gap below the held by the jaws Bow pile pulled out, so that of the jaws held stack of sheets on the arranged below the auxiliary table pallet can be lowered. Next, the clamping of the solved by the jaws clamped sheet pile by the distance the jaws is enlarged again to each other. The must upper jaw slightly raised, as the lower jaw directly adjacent to the empty pallet. Subsequently, first the lower jaw from the gap between the empty palette and the previously clamped stack of sheets and then the upper jaw pulled out of the gap above the previously clamped sheet pile become. Then the cycle starts again.

Weiterhin ist aus der EP 0 77 3179 A2 eine Vorrichtung der eingangs genannten Art bekannt, die ein Trennschwert aufweist, das von der Seite her zwischen die beiden Bögen, zwischen denen die Lücke zu bilden ist, einfährt und den oberen Bogen im Hinterkantenbereich abstützt, bis ein Hilfsstapelträger seine eingeschobene Position erreicht hat. Dabei wirkt das Trennschwert mit einer Halteeinrichtung, wie z.B. einem Trennkeil, in der Weise zusammen, dass Letzterer das Trennschwert und den oberen Bogen im Hinderkantenbereicht ansaugend von unten festhält, bis der Hilfsstapelträger eingefahren ist. Eine ähnliche Vorrichtung findet sich in der US 2,853,299, bei der jedoch im Unterschied zum vorgenannten Stand der Technik kein Trennschwert vorgesehen ist, sondern der Trennkeil selbst zum Bilden der Lücke zwischen den beiden Bögen verwendet wird.Furthermore, from EP 0 77 3179 A2 a device of the aforementioned Kind known, which has a separating sword, from the side between the two arches, between which the gap is to be formed, enters and supports the upper arc in the trailing edge region until an auxiliary stack carrier has reached its inserted position. This works Separating sword with a holding device, such. a separating wedge, in the Wise together that the latter is the separating sword and the upper bow in the Hinderkantenbereicht ansaugend holds from below until the auxiliary pile carrier retracted. A similar device is found in the US 2,853,299, but in contrast to the aforementioned state of Technology no separating sword is provided, but the separating wedge itself is used to form the gap between the two arches.

Die aus dem Stand der Technik bekannten Verfahren und Anlagen erreichen zwar den gewünschten Zweck des Palettenwechsels, jedoch ist zur Erreichung dieses Zieles ein relativ hoher konstruktiver Aufwand von Nöten. Aufgabe der vorliegenden Erfindung ist es daher, eine weniger aufwendige Vorrichtung zu schaffen.Achieve the known from the prior art methods and equipment Although the desired purpose of the pallet change, but is to Achieving this goal a relatively high design effort of needs. Object of the present invention is therefore a less expensive To create device.

Diese Aufgabe wird durch ein Verfahren gemäß Anspruch 1 bzw. durch eine Vorrichtung gemäß Anspruch 11 oder eine Trennbacke gemäß Anpruch 12 gelöst.This object is achieved by a method according to claim 1 or by a device according to claim 11 or a separating jaw according Anpruch 12th solved.

Die Vorteile der Erfindung liegen insbesondere darin, daß aufgrund der Erfindung eine Einklemmung eines Stapels von Bogen nicht mehr notwendig ist. Vielmehr wird aufgrund der Erfindung der Bogen an die Trennbacke angesaugt, so daß keine Krafteinwirkung auf den Bogenstapel bzw. auf die einzelnen Bogen in Stapelrichtung notwendig ist. Darüber hinaus werden dank der Erfindung die Klemmbacken überflüssig, was eine erhebliche Vereinfachung des Verfahrens und auch der nach einem solchen Verfahren arbeitenden Vorrichtung darstellt. The advantages of the invention are, in particular, that due to the invention an entrapment of a stack of bows no longer necessary is. Rather, due to the invention, the sheet is sucked to the separating jaw, so that no force on the sheet pile or on the single sheet is necessary in the stacking direction. Beyond that thanks to the invention, the jaws superfluous, which is a considerable simplification of the method and also according to such a method represents working device.

Die Erfindung nutzt eine spezielle Eigenschaft eines Bogenstapels aus, der aufgrund der Präzision heutiger Schneidevorrichtungen an seinen Seitenflächen praktisch eine geschlossene, nahezu glatte Oberfläche bildet. Diese Tatsache ermöglicht es, einen solchen Bogenstapel von der Seite her anzusaugen.The invention takes advantage of a special property of a sheet pile, the due to the precision of today's cutting devices on its side surfaces practically forms a closed, almost smooth surface. These The fact makes it possible to suck in such a stack of sheets from the side.

Eine bevorzugte Ausführungsform des erfindungsgemäßen Verfahrens zeichnet sich dadurch aus, daß bei dem Verfahren gemäß Anspruch 1 das Erzeugen der Lücke zwischen dem ersten Bogenstapel und den nachfolgenden Bogen erwirkt wird, indem der Trennfinger langsamer entgegen der Stapelrichtung des ersten A preferred embodiment of the method according to the invention is characterized in that in the method according to claim 1 the Generating the gap between the first sheet stack and the following Arc is obtained by the separating finger slower against the Stacking direction of the first

Bogenstapels abgesenkt wird als der erste Bogenstapel selbst. Auf diese Weise wird auf einfache Weise die Lücke erzeugt.Sheet pile is lowered as the first sheet pile itself. This way creates the gap in a simple way.

Eine weitere bevorzugte Ausführungsform des erfindungsgemäßen Verfahrens weist den Schritt auf, das gleichzeitig mit oder nach dem Einbringen der Trennbacke in die von dem Trennfinger erzeugte Lücke der Trennfinger aus der Lücke genommen wird. Diese Ausführungsform ermöglicht es beispielsweise, dass der Trennfinger nicht in einer Ausnehmung in der Trennbacke geführt werden muss. Alternativ ist es jedoch möglich, den Trennfinger in einer Ausnehmung der Trennbacke zu führen, so dass die Trennbacke in die Lücke geschoben werden kann, während sich auch der Trennfinger noch in der Lücke befindet.A further preferred embodiment of the method according to the invention has the step, the same time with or after the introduction of the release jaw in the is taken from the gap generated by the separating finger gap of the separating finger from the gap. This embodiment allows, for example, that the separating finger is not in a recess in the separating jaw must be performed. Alternatively, it is possible to guide the separating finger in a recess of the separating jaw, so that the Separating jaw can be pushed into the gap, while also the separating finger still in the gap.

Eine besonders bevorzugte Ausführungsform der Erfindung zeichnet sich dadurch aus, dass in der Trennbacke den nachfolgenden Bogen zugewandte Öffnungen vorgesehen sind, durch die die nachfolgenden Bogen angesaugt werden, indem durch diese Öffnungen Gas, bevorzugt Luft, angesaugt wird. Bei dieser Ausführungsform kann die Trennbacke beispielsweise als Hohlkörper ausgeführt werden, in welchem Hohlkörper ein Vakuum erzeugt wird. Der Hohlkörper ist dann neben den Öffnungen in seiner Wandung auch noch mit Öffnungen versehen, durch die der Hohlkörper an die Saugseite eines Gebläses oder eine andere Unterdruckquelle anschließbar ist.A particularly preferred embodiment of the invention is characterized that provided in the separating jaw the subsequent arc facing openings are through which the subsequent bows are sucked by this Openings gas, preferably air, is sucked. In this embodiment, the Separating jaw, for example, be designed as a hollow body, in which hollow body a vacuum is generated. The hollow body is then next to the openings in his Wall also provided with openings through which the hollow body to the Suction side of a fan or other vacuum source is connected.

Bei einer besonders bevorzugten Ausführungsform saugt die Trennbacke den untersten Bogen an seiner Unterseite an. Somit wird dieser Boden zusätzlich fixiert.In a particularly preferred embodiment, the separating jaw sucks the bottom arch at its bottom. Thus, this floor is additionally fixed.

Die Erfindung zeichnet sich dadurch aus, dass bei einem bereits im Wirkbereich der Trennbacke aus nachfolgenden Bogen gebildeten Anfang eines neuen Stapels der Rücken dieses neuen Stapels von der Trennbacke angesaugt wird. Darüber hinaus kann das Ansaugen des Rückens des neuen Stapels auch kummulativ zu dem Ansaugen der Unterseite im Bereich des Rückens des neuen Stapels vorgesehen werden. Letztere Ausführungsform verspricht eine zusätzliche und maximale Fixierung des neuen Stapels an der derart arbeitenden Trennbacke. Die Trennbacke ist dabei vorzugsweise als Winkel ausgebildet. Dabei weist die Trennbacke zwei vorzugsweise rechtwinklig angeordnete Oberflächen auf, die jeweils Öffnungen aufweisen, durch die ein Unterdruck im Bereich dieser Oberflächen erzeugt wird. Die eine Oberfläche ist dabei parallel zur Ebene der Bogen angeordnet, während die andere Oberfläche parallel zum Rücken des neuen Stapels angeordnet ist. Somit wird mit Hilfe einer solchen rechtwinkligen Trennbacke eine maximal große Kontaktfläche von Trennbacke und Rücken bzw. von Trennbacke und Unterseite im Bereich des Rückens des neuen Stapels erzielt.The invention is characterized in that in one already in the effective range of Trennbacke from subsequent sheets formed beginning of a new stack of Back of this new stack is sucked by the release jaw. Furthermore The suction of the back of the new stack can also cumulatively to that Suction of the bottom provided in the area of the back of the new stack become. The latter embodiment promises additional and maximum fixation of the new stack on the separating jaw thus working. The release jaw is included preferably formed as an angle. In this case, the separating jaw preferably has two at right angles disposed surfaces, each having openings through which a negative pressure in the region of these surfaces is generated. The one surface is arranged parallel to the plane of the arc, while the other surface is arranged parallel to the back of the new stack. Thus, with the help of a Such rectangular release jaw a maximum contact area of Separating jaw and back or of separating jaw and bottom in the area of Back of the new stack achieved.

Eine weitere bevorzugte Ausführungsform des erfindungsgemäßen Verfahrens zeichnet sich dadurch aus, daß während des Einbringens des Hilfstisches mindestens ein auf seiner Oberfläche angeordnetes Band derart aktiviert wird, daß die Relativgeschwindigkeit zwischen dem Band und dem untersten Bogen der nachfolgenden Bogen im wesentlichen gleich Null ist. Auf diese Weise werden auch beim Einbringen des Hilfstisches in die durch die erfindungsgemäße Trennbacke gebildete Lücke Markierungen an der Unterseite des neuen Stapels bzw. an der Unterseite des untersten Bogens der nachgeförderten Bogen vermieden.Another preferred embodiment of the method according to the invention is characterized in that during the introduction of the auxiliary table at least one band arranged on its surface is activated in such a way that the relative velocity between the band and the lowest bow of the subsequent arc is substantially equal to zero. This way too when introducing the auxiliary table in the through the inventive release jaw formed gap markings at the bottom of the new stack or at the Underside of the bottom arc of the post-conveyed bow avoided.

Eine besonders vorteilhafte und besonders bevorzugte Ausführungsform der Erfindung zeichnet sich dadurch aus, daß während des Einbringens des Hilfstisches Gas, bevorzugt Luft, gegen die Unterseite des Bandes geblasen wird. Auf diese Weise wird die Reibung zwischen dem Hilfstisch und dem Band verringert. Besonders bevorzugt ist es dabei, wenn das an der Oberfläche des Hilfstisches angeordnete Band zur Vermeidung einer Relativgeschwindigkeit von Hilfstischoberfläche und unterstem nachfolgenden Bogen als Tuch ausgebildet ist.A particularly advantageous and particularly preferred embodiment of Invention is characterized in that during the introduction of the auxiliary table Gas, preferably air, is blown against the underside of the belt. To this Way, the friction between the auxiliary table and the belt is reduced. It is particularly preferred if that on the surface of the auxiliary table arranged band to avoid a relative speed of auxiliary table surface and bottom following bow is formed as a cloth.

Weitere bevorzugte Ausführungsformen der Erfindung sind in den Unteransprüchen angegeben.Further preferred embodiments of the invention are in the subclaims specified.

Eine Ausführungsform des erfindungsgemäßen Verfahrens und eine Ausführungsform der erfindungsgemäßen Vorrichtung wird nun anhand der Zeichnung erklärt.An embodiment of the method according to the invention and an embodiment the device according to the invention will now be explained with reference to the drawing.

Die Zeichnung zeigt:

Fig. 1 bis 10
eine Ausführungsform eines erfindungsgemäßen Verfahrens in Form von zehn schematischen Momentanaufnahmen der das erfindungsgemäße Verfahren ausführenden erfindungsgemäßen Vorrichtung.
The drawing shows:
Fig. 1 to 10
an embodiment of a method according to the invention in the form of ten schematic snapshots of the inventive method performing device according to the invention.

Die Fig. 1 zeigt schematisch eine Vorrichtung 1 zum Wechseln von Paletten für Bogenstapel bei ununterbrochener Förderung von Bogen zur Stapelstelle. Die Vorrichtung 1 weist ein Zuförderband 2 auf. Auf dem Zuförderband 2 werden Bogen 4 zu einer Stapelstelle 6 gefördert. Die Stapelstelle 6 wird in Förderrichtung begrenzt durch einen als Anschlag für die zur Stapelstelle 6 geförderten Bogen dienenden Frontanrichter 8. Dem Frontanrichter 8 gegenüberliegend wird die Stapelstelle 6 durch einen schematisch dargestellten, wandartigen hinteren Anrichter 10 begrenzt. Der Frontanrichter 8 und der hintere Anrichter 10 verlaufen vertikal. Das Zuförderband 2 verläuft horizontal. Nach unten wird die Stapelstelle 6 durch eine horizontal angeordnete Palette 12 begrenzt. Die Palette 12 ist - wie durch den Pfeil 14 angedeutet - nach unten absenkbar, um zu ermögüchen, daß die Oberkante 16 aus bereits auf der Palette 12 gestapelten Bogen 4 stets in der gleichen Höhe verbleibt, d.h. relativ zur Förderebene des Zuförderbandes 2 unverändert bleibt. Die zur Absenkung der Palette 12 erforderlichen Absenkmittel sind in der Zeichnung nicht dargestellt.Fig. 1 shows schematically a device 1 for changing pallets for Sheet stack with continuous delivery of sheets to the stacking point. The Device 1 has a feed belt 2. Be on the conveyor belt 2 Bow 4 promoted to a stacking point 6. The stacking point 6 is in the conveying direction limited by a supported as a stop for the stacking point 6 bow front-end adjuster 8. The front-end 8 opposite the Stacking point 6 through a schematically illustrated, wall-like rear Installer 10 limited. The front-end 8 and the rear-end 10 run vertical. The feed belt 2 runs horizontally. Down is the stacking point 6 bounded by a horizontally arranged pallet 12. The pallet 12 is - like indicated by the arrow 14 - lowered down to ermögüchen that the Top edge 16 from already stacked on the pallet 12 sheet 4 always in the remains the same height, i. relative to the conveying plane of the feed belt 2 remains unchanged. The lowering of the pallet 12 required lowering are not shown in the drawing.

Der Frontanrichter 8 weist Durchbohrungen 18 auf. Die Durchbohrungen 18 verbinden die Vorderseite 20 des Frontanrichters 8 mit einer Rückseite 22 des Frontanrichters 8. An der Rückseite 22 ist um den Bereich herum, in welchem die Durchbohrungen 18 münden ein Hohlraum 24 vorgesehen. In dem Hohlraum 24 ist durch nicht dargestellte Pumpmittel ein Unterdruck erzeugbar.The front-end 8 has through holes 18. The drill holes 18 connect the front 20 of the front-end 8 with a back 22 of the At the back 22 is around the area in which the Through holes 18 open a cavity 24 is provided. In the cavity 24 is by a pumping means, not shown, a negative pressure generated.

Der hintere Anrichter 10 weist in den in den Fig. dargestellten Seitenansichten nicht sichtbare Ausnehmungen auf, durch die ein Trennfinger 26 und eine Trennbacke 28 in den Bereich des bereits auf der Palette 12 gestapelten Bogenstapels 30 gelangen können.The rear 10 does not have in the side views shown in the figures visible recesses through which a separating finger 26 and a separating jaw 28th reach the area of the already stacked on the pallet 12 sheet stack 30 can.

Der Trennfinger 26 wird mit Hilfe eines schematisch angedeuteten Antriebes 32 bewegt. Der Trennfinger 26 kann sowohl in der durch den Pfeil 14 angedeuteten Richtung nach unten, als auch in der entgegengesetzten Richtung, als auch in Richtung auf den Bogenstapel 30 zu verfahren werden. Der Trennfinger 26 kann unabhängig von allen anderen Teilen der Vorrichtung 1 bewegt werden. Der Trennfinger 26 weist eine Grundplatte 34 auf, die in der in der Fig. 1 dargestellten Grundstellung des Trennfingers 26 parallel zu dem hinteren Anrichter 10 verläuft. An dem dem Zuförderband 2 zugewandten Ende 36 der Grundplatte 34 des Trennfingers 26 ist senkrecht zur Grundplatte 34 eine den eigentlichen Trennfinger 26 bildende Trennplatte 38 angebracht. In diesem Zusammenhang sei darauf hingewiesen, daß der in den Fig. dargestellte Abstand der Bogen 4 an der Stapelstelle 6 bzw. in dem Bogenstapel 30 nur der Erleichterung des Verständnisses der Zeichnung dient. Selbstverständlich ist in Wirklichkeit der Abstand der Bogen 4 untereinander gleich 0. The separating finger 26 is by means of a schematically indicated drive 32nd emotional. The separating finger 26 can both in the direction indicated by the arrow 14 Direction down, as well as in the opposite direction, as well as in Direction to the sheet stack 30 to be moved. The separating finger 26 can be moved independently of all other parts of the device 1. Of the Separating finger 26 has a base plate 34, which in the one shown in FIG Basic position of the separating finger 26 runs parallel to the rear of the organizer 10. At the feed belt 2 facing the end 36 of the base plate 34 of the Separating finger 26 is perpendicular to the base plate 34 a the actual separating finger 26 forming partition plate 38 is attached. In this context, be sure indicated that the distance shown in the figures, the sheet 4 at the Stacking point 6 or in the sheet stack 30 only to facilitate understanding the drawing is used. Of course, in reality, the distance is the arc 4 equal to each other 0.

Die Trennbacke 28 ist ebenso wie der Trennfinger 26 als Winkel ausgebildet. Auch die Trennbacke 28 weist eine parallel zum hinteren Anrichter 10 verlaufende Grundplatte 40 auf. An der Grundplatte 40 ist an dem dem Zuförderband 2 abgewandten Ende eine Nase 42 angeordnet. Die Nase 42 verläuft zunächst von der Grundplatte 40 ausgehend senkrecht zur Grundplatte 40, wobei die Nase 42 an ihrem vorderen Ende abgerundet ist. In dem senkrecht zur Grundplatte 40 verlaufenden Abschnitt der Nase 42 sind Durchbohrungen 46 in der Wandung 48 der Nase 42 vorgesehen. Diese Durchbohrungen 46 in der Wandung 48 der Nase 42 verbinden die Oberfläche 44 der Nase 42 mit einem Hohlraum 50 innerhalb der Trennbacke 28. In diesem Hohlraum 50 ist ein Unterdruck erzeugbar, so daß durch die Öffnungen 46 in der Wandung 48 Luft aus dem Außenraum in den Hohlraum 50 eingesaugt wird. Darüber hinaus ist in dem Hohlraum 50 ein Überdruck erzeugbar, so daß durch die Bohrungen 46 in der Wandung 48 der Nase 42 Luft nach außen ausgeblasen wird. Der Unterdruck bzw. der Überdruck in dem Hohlraum 50 wird durch nicht dargestellte Pumpmittel zur Verfügung gestellt.The release jaw 28 is formed as well as the separation finger 26 as an angle. Also the separating jaw 28 has a parallel to the rear 10 runner Base plate 40 on. On the base plate 40 is on the feed conveyor the second facing away from a nose 42 is arranged. The nose 42 runs first from the base plate 40, starting perpendicular to the base plate 40, wherein the nose 42 at its front end is rounded. In the perpendicular to the base plate 40th extending portion of the nose 42 are through holes 46 in the wall 48th the nose 42 provided. These holes 46 in the wall 48 of the nose 42 connect the surface 44 of the nose 42 with a cavity 50 within the Separating jaw 28. In this cavity 50, a negative pressure can be generated, so that the openings 46 in the wall 48 air from the outside space into the cavity 50 is sucked. In addition, in the cavity 50 is an overpressure producible, so that through the holes 46 in the wall 48 of the nose 42 air blown outward. The negative pressure or the overpressure in the cavity 50 is provided by pumping means, not shown.

Hinter der Grundplatte 40 der Trennbacke 28 ist ein zweiter Hohlraum 52 vorgesehen. Der zweite Hohlraum 52 läßt sich auch unter Unterdruck setzen. Dieser Unterdruck kann durch die gleichen Pumpmittel bewerkstelligt werden, die auch den Unterdruck in dem Hohlraum 50 zur Verfügung stellen. Mit Hilfe des Unterdruckes in dem Hohlraum 52 läßt sich an der Oberfläche 54 der Grundplatte 40 der Trennbacke 28 Unterdruck erzeugen, indem durch Durchbohrungen 56 in der Grundplatte 40 der Trennbacke 28 Luft aus dem Außenraum in den Hohlraum 52 eingesaugt wird.Behind the base plate 40 of the separating jaw 28 is a second cavity 52nd intended. The second cavity 52 can also be put under negative pressure. This Underpressure can be accomplished by the same pumping means, including the Vacuum in the cavity 50 provide. With the help of negative pressure in the cavity 52 can be at the surface 54 of the base plate 40 of the Trennbacke 28 generate negative pressure by passing through holes 56 in the Base plate 40 of the separating jaw 28 air from the outside space in the cavity 52nd is sucked in.

Weiterhin zeigt die Fig. 1 einen schematisch dargestellten Hilfstisch 58. Der Hilfstisch 58 verläuft parallel zum Zuförderband 2. Auf dem Hilfstisch 58 ist ein schematisch dargestelltes Tuch 60 bewegbar angebracht. Der Hilfstisch 58 läßt sich in der durch den Pfeil 62 angedeuteten Richtung parallel zu den in dem Bogenstapel 30 gestapelten Bogen 4 verfahren. Gleichzeitig mit dem Verfahren des Hilfstisches 58 in Richtung des Pfeiles 62 läßt sich das Tuch mit entgegengesetzter, betragsmäßig jedoch gleicher Geschwindigkeit in Richtung des Pfeiles 64 auf dem Hilfstisch 58 verfahren. Die Kombination aus Hilfstisch 58 und Tuch 60 läßt sich somit derart bewegen, daß ein Punkt x auf dem Tuch 60 während des Verfahrens des Hilfstisches 58 raumfest bleibt. Weitere Funktionen des Hilfstisches 58 werden mit Bezug auf die folgenden Fig. beschrieben. Furthermore, Fig. 1 shows a schematically illustrated auxiliary table 58th Der Auxiliary table 58 runs parallel to the feed belt 2. On the auxiliary table 58 is a schematically shown cloth 60 movably mounted. The auxiliary table 58 leaves in the direction indicated by the arrow 62 in parallel to the direction in the Sheet stack 30 stacked sheet 4 method. Simultaneously with the procedure of Auxiliary table 58 in the direction of arrow 62 can be the cloth with opposite, in terms of magnitude, however, same speed in the direction of arrow 64 on the Auxiliary table 58 moved. The combination of auxiliary table 58 and cloth 60 can be thus move such that a point x on the cloth 60 during the process the auxiliary table 58 remains fixed in space. Other functions of the auxiliary table 58 will be with reference to the following figures.

Die Fig. 1 zeigt den Grundzustand der Vorrichtung 1 bzw. des erfindungsgemäßen Verfahrens. In diesem Grundzustand wird zunächst gesteuert von einer nicht dargestellten Steuereinrichtung eine vorgegebene Anzahl von Bogen 4 zu einem Bogenstapel 30 auf der Palette 12 gestapelt. Dies geschieht, indem ein unterbrochener Strom von Bogen 4 mit Hilfe des Zuförderbandes 2 zur Stapelstelle 6 gegen den Frontanrichter 8 gefördert wird. Gleichzeitig wird die Palette 12 durch nicht dargestellte Absenkmittel abgesenkt, um die Vorderkante 16 relativ zur Förderebene des Zuförderbandes 2 unverändert zu lassen. Dabei befinden sich der Trennfinger 26, die Trennbacke 28 und der Hilfstisch 58 in den in der Fig. 1 dargestellten Positionen. Sowohl in dem Hohlraum 50 als auch in dem Hohlraum 52 befindet sich weder ein Unter- noch ein Überdruck. In der in der Fig. 1 dargestellten Ausführungsform ist in dem Hohlraum 24 des Frontanrichters 8 ebenfalls kein Unterdruck erzeugt.Fig. 1 shows the ground state of the device 1 and the inventive Process. In this ground state is initially controlled by a not shown control device a predetermined number of sheets 4 to a Sheet stack 30 stacked on the pallet 12. This is done by a broken one Stream of sheet 4 by means of the feed belt 2 to the stacking point. 6 is promoted against the front end 8. At the same time the pallet 12 through Lowering means not shown lowered to the front edge 16 relative to Conveyor plane of the feed conveyor 2 to leave unchanged. Here are the Separating finger 26, the separating jaw 28 and the auxiliary table 58 in the in Fig. 1st positions shown. Both in the cavity 50 and in the cavity 52 There is neither a negative pressure nor an overpressure. In that shown in FIG. 1 Embodiment is also not in the cavity 24 of the front-end 8 Negative pressure generated.

Nachdem von einem nicht dargestellten Sensor- oder Zählmittel festgestellt wurde, daß eine genügende Anzahl von Bogen auf dem Bogenstapel 30 an der Stapelstelle 6 auf der Palette 12 gestapelt wurde, wird der Trennfinger 26 von der in Förderrichtung des Zuförderbandes 2 hinteren Seite in den Strom der zugeförderten Bogen 4 geschoben. Der Trennfinger 26 begrenzt somit gemäß Fig. 2 den fertigen ersten Bogenstapel 30 nach oben und trennt die nachfolgenden Bogen 4 von dem fertigen ersten Bogenstapel 30. Unmittelbar nach dem Einführen des Trennfingers 26 zwischen dem fertigen ersten Bogenstapel 30 und den weiter nachfolgenden Bogen 4 wird der Trennfinger 26 parallel zum Absenken der Palette 12 (Pfeil 14), wie durch den Pfeil 66 angedeutet, abgesenkt. Wie durch die verschiedenen Längen der Pfeile 14 bzw. 66 weiterhin angedeutet ist, geschieht das Absenken des Trennfingers 26 jedoch langsamer als das Absenken der Palette 12. Alle übrigen Bestandteile der Vorrichtung 1 sind gegenüber ihrem in Fig. 1 dargestellten Zustand unverändert. Durch das schnellere Absenken der Palette 12 gegenüber dem Absenken des Trennfingers 26 bildet sich eine in der Fig. 3 dargestellte Lücke 68 zwischen dem ersten Bogenstapel 30 und den weiter von dem Zuförderband 2 nachgeförderten Bogen 4, die zur Stapelstelle 6 gelangen. In die so gebildete Lücke 68 zwischen dem Bogenstapel 30 und den nachfolgenden Bogen 4 wird die Trennbacke 28 eingeschoben. Dabei gelangt die Trennbacke 28 mit ihrer Grundplatte 40 in Kontakt mit dem Rücken 70 des sich inzwischen aufgestapelten neuen Stapels aus Bogen 4, die von dem Trennfinger 26 gegenüber dem Bogenstapel 30 zurückgehalten wurden. Die Oberseite 44 der Nase 42 gelangt dabei mit der Unterseite 72 des untersten der Bogen 4 oberhalb des Trennfingers 26 in Kontakt. Gleichzeitig mit dem Einschieben der Trennbacke 28 in die Lücke 68 oder unmittelbar danach wird der Trennfinger 26 aus der Lücke 68 herausgezogen, so daß sich der in der Fig. 4 dargestellte Zustand ergibt. Gleichzeitig mit dem Einschieben der Trennbacke 28 in die Lücke 68 wird die Trennbacke 28 parallel zum Absenken des Trennfingers 26 gemäß dem Pfeil 66 ebenfalls abgesenkt (siehe Pfeil 74). Alle übrigen Bestandteile der Vorrichtung 1 sind weiterhin in einem unveränderten Zustand.Having been detected by a sensor or counting means, not shown, that a sufficient number of sheets on the sheet stack 30 at the stacking point 6 was stacked on the pallet 12, the separating finger 26 of the in Conveying direction of the feed conveyor 2 back side in the flow of zugeförderten Bow 4 pushed. The separating finger 26 thus limited as shown in FIG. 2 the finished first sheet stack 30 upwards and separates the subsequent sheet 4 of the finished first sheet stack 30. Immediately after the insertion of the release finger 26 between the finished first sheet stack 30 and the more subsequent Sheet 4, the separating finger 26 is parallel to the lowering of the pallet 12 (arrow 14), as indicated by the arrow 66, lowered. As by the different lengths the arrows 14 and 66 is further indicated, the lowering of the happens Trennfingers 26, however, slower than the lowering of the pallet 12. All the rest Components of the device 1 are compared to their state shown in Fig. 1 unchanged. Due to the faster lowering of the pallet 12 relative to the Lowering the separating finger 26 forms a gap 68 shown in FIG. 3 between the first sheet stack 30 and farther from the feed belt 2 nachgeförderten sheet 4, which arrive at the stacking point 6. In the gap thus formed 68 between the sheet stack 30 and the subsequent sheet 4 is the separating jaw 28 inserted. In this case, the separating jaw 28 arrives with its base plate 40 in contact with the back 70 of the now stacked new stack from sheet 4, the separation of the finger 26 against the sheet stack 30th were held back. The top 44 of the nose 42 passes with the Bottom 72 of the bottom of the sheet 4 above the separating finger 26 in contact. Simultaneously with the insertion of the separating jaw 28 in the gap 68 or Immediately thereafter, the separating finger 26 is pulled out of the gap 68, so that results in the state shown in FIG. 4. Simultaneously with the Inserting the separating jaw 28 in the gap 68, the separating jaw 28 is parallel to Lowering of the separating finger 26 according to the arrow 66 also lowered (see arrow 74). All other components of the device 1 are still in an unchanged Status.

Noch während oder unmittelbar nach dem Herausziehen des Trennfingers 26 aus der Lücke 68 wird sowohl in dem Hohlraum 50 als auch in dem Hohlraum 52 der Trennbacke 28 ein Unterdruck erzeugt. Mit Hilfe dieses Unterdruckes wird durch die Öffnungen 56 in der Grundplatte 40 der Trennbacke 28 Luft in den Hohlraum 52 eingesaugt. Durch dieses Einsaugen von Luft durch die Öffnungen 56 wird an der Oberfläche 54 der Grundplatte 40 ein Unterdruck erzeugt, welcher etwaige noch zwischen den Bogen befindliche Luft absaugt und den Rücken 70 des neuen Stapels 76 aus nachgeförderten Bogen 4 an der Grundplatte 40 fixiert.Still during or immediately after pulling the separating finger 26 off the gap 68 is in both the cavity 50 and in the cavity 52 of the Separating jaw 28 generates a negative pressure. With the help of this negative pressure is through the openings 56 in the base plate 40 of the separating jaw 28 air in the cavity 52 sucked. By this suction of air through the openings 56 is at the surface 54 of the base plate 40 generates a negative pressure, which any still located between the bow air sucks and the back 70 of the new Stack 76 of nachgeförderten sheet 4 fixed to the base plate 40.

Durch den Unterdruck in dem Hohlraum 50 der Trennbacke 28 wird Luft durch die Öffnungen 46 in der Wandung 48 der Nase 42 der Trennbacke 28 in den Hohlraum 50 eingesogen, die die Unterseite 72 des untersten Bogens 4 des neuen Bogenstapels 76 an der Oberfläche 44 der Nase 42 an der Trennbacke 28 fixiert.Due to the negative pressure in the cavity 50 of the separating jaw 28, air is through the Openings 46 in the wall 48 of the nose 42 of the release jaw 28 into the cavity 50 sucked the bottom 72 of the bottom sheet 4 of the new sheet stack 76 fixed to the surface 44 of the nose 42 on the separating jaw 28.

Gleichzeitig mit dem Erzeugen von Unterdrücken in den Hohlräumen 50 und 52 wird auch in dem Hohlraum 24 des Frontanrichters 8 ein Unterdruck erzeugt. Somit wird Luft durch die Durchbohrungen 18 in dem Fronteinrichter 8 in den Hohlraum 24 eingesogen. Somit entsteht an der Vorderseite 20 des Frontanrichters 8 im Bereich der Durchbohrungen 18 ebenfalls ein Unterdruck. Mit Hilfe dieses Unterdruckes wird Luft zwischen den Bogen abgesaugt und die in Förderrichtung des Zuförderbandes 2 vorne liegenden Enden der Bogen 4 gegen den Frontanrichter 8 gezogen und so ein Absinken der vorderen Enden 78 auf den ersten Bogenstapel 30 verhindert.Simultaneously with the generation of negative pressures in the cavities 50 and 52 becomes also in the cavity 24 of the front-end 8 generates a negative pressure. Thus, will Air through the through holes 18 in the front 8 in the cavity 24th sucked. Thus arises at the front 20 of the front 8 in the area the through holes 18 also a negative pressure. With the help of this negative pressure Air is sucked between the sheet and in the conveying direction of the feed conveyor 2 front ends of the sheet 4 is pulled against the front end 8 and so sinking of the front ends 78 on the first sheet stack 30th prevented.

Gleichzeitig mit dem vorstehend beschriebenen Fixieren des neuen Stapels 76 an der Trennbacke 28 wird der Trennfinger 26 zusammen mit dem ersten Bogenstapel 30 auf der Palette 12 nach unten gemäß dem Pfeil 14 verfahren. Somit gelangt der Trennfinger 26 zunächst in die in der Fig. 5 und anschließend in die in der Fig. 6 dargestellte Position unterhalb der Ebene des Hilfstisches 58. Simultaneously with the above-described fixing of the new stack 76 at the separating jaw 28 becomes the separating finger 26 together with the first sheet stack 30 on the pallet 12 down according to the arrow 14. Thus, the arrives Separating finger 26 first in the in Fig. 5 and then in the in Fig. 6 shown position below the level of the auxiliary table 58th

In der Fig. 6 ist ein weiterer Verfahrensschritt dargestellt. Indem die Palette 12 mit einer relativ zu der Absenkgeschwindigkeit der Trennbacke 28 höheren Absenkgeschwindigkeit (Pfeil 14) abgesenkt wurde, wurde die Lücke 68 zwischen dem neuen Stapel 76 und dem ersten Bogenstapel 30 weiter vergrößert. In die nun weiter vergrößerte Lücke 68 wird bei unverändert aufrecht erhaltenen Unterdrücken in den Hohlräumen 50, 52 und 24 der Hilfstisch 58 gemäß Pfeil 80 hineingefahren. Dabei sorgt vor allem der Unterdruck in dem Hohlraum 24 dafür, daß die Unterseite 72 des untersten Bogens 4 des neuen Stapels 76 nicht auf den Hilfstisch 58 bzw. auf das auf dem Hilfstisch entgegen der Bewegungsrichtung 80 rückwärtslaufende Tuch 60 fällt. Sollte die Unterseite 72 dennoch in Berührung mit dem Tuch 60 kommen, so wird durch die betragsmäßig mit gleicher Geschwindigkeitskomponente wie der Hilfstisch 58 (Pfeil 80) rückwärts gerichtete Bewegung des Tuches 60 (siehe Pfeil 64 in der Fig. 1) eine Relativbewegung zwischen der Unterseite 72 und dem Tuch 60 vermieden. Somit kann es zu keinen Markierungen auf der Unteseite 72 des Bogens 4 durch das Tuch 60 kommen. Ein leichtes und ruckfreies Gleiten des Tuches 60 auf dem Hilfstisch 58 wird durch einen Luftfilm gewährleistet, der durch aus Öffnungen des Hilfstisches 58 austretende Durckluft erzeugt wird. Das Ausblasen der Luft aus dem Hilfstisch 58 ist durch die Pfeile 82 angedeutet. Schließlich gelangt der Hilfstisch 58 in die in der Fig. 7 dargestellte Position. Gleichzeitig mit dem Einfahren des Hilfstisches 58 in die vergrößerte Lücke 68 wird der Hilfstisch 58 gemäß Pfeil 84 parallel mit der Trennbacke 28 abgesenkt, so daß weiterhin gewährleistet ist, daß die Oberkante 16 der gestapelten Bogen gegenüber dem Zuförderband 2 unverändert bleibt.FIG. 6 shows a further method step. By the pallet 12 with a relative to the lowering speed of the separating jaw 28 higher lowering speed (Arrow 14) was lowered, the gap 68 between the new Stack 76 and the first sheet stack 30 further enlarged. In the now continue enlarged gap 68 is maintained with unchanged maintained suppression in the Cavities 50, 52 and 24 of the auxiliary table 58 in accordance with arrow 80 in drive. there especially the negative pressure in the cavity 24 ensures that the bottom 72nd of the lowermost sheet 4 of the new stack 76 not on the auxiliary table 58 and on the backwards running on the auxiliary table counter to the direction of movement 80 Cloth 60 drops. Should the bottom 72 still in contact with the cloth 60th come, is so by the amount with the same speed component as the auxiliary table 58 (arrow 80) backward movement of the cloth 60th (see arrow 64 in FIG. 1) a relative movement between the bottom 72 and the cloth 60 avoided. Thus, there can be no marks on the underside 72 of the sheet 4 through the cloth 60 come. A light and smooth glide of the cloth 60 on the auxiliary table 58 is ensured by an air film, the is produced by emerging from openings of the auxiliary table 58 Durckluft. The Blowing out the air from the auxiliary table 58 is indicated by the arrows 82. Finally, the auxiliary table 58 reaches the position shown in FIG. Simultaneously with the retraction of the auxiliary table 58 in the enlarged gap 68 the auxiliary table 58 according to arrow 84 is lowered parallel to the separating jaw 28, so that Furthermore, it is ensured that the upper edge 16 of the stacked sheet opposite the feed belt 2 remains unchanged.

Anschließend wird der vollständige erste Bogenstapel 30 mitsamt der Palette 12 wegbefördert. Gleichzeitig mit dem weiterhin kontinuierlich verlaufenden Absenken der Trennbacke 28 und des Hilfstisches 58, um die Oberkante 16 des neuen Stapels 76 unverändert gegenüber dem Zuförderband 2 zu halten, wird eine neue Palette 86 von unten an den Hilfstisch 58 herangebracht. Zuvor wurde bereits der Unterdruck in dem Hohlraum 24 des Frontanrichters 8 aufgehoben, um ein weiteres Absenken des neuen Stapels 76 nicht zu behindern. In der dargestellten Ausführungsform wird gemäß Fig. 8 das Ausblasen von Luft aus dem Hilfstisch 58 zu diesem Zeitpunkt gestoppt. Alternativ kann jedoch das Ausblasen von Luft aus dem Hilfstisch 58 weiter fortgesetzt werden, bis der Hilfstisch 58 aus der in der Fig. 8 dargestellten Position in seine in der Fig. 9 dargestellte Position zurückgezogen wurde. Dieses Zurückziehen des Hilfstisches 58 verläuft entsprechend dem Hineinschieben des Hilfstisches 58. Auch bei einem Herausziehen des Hilfstisches 58 wird das Tuch 60 so auf dem Hilfstisch 58 abgewickelt, daß keine Relativbewegung zwischen der Unterseite 72 des untersten Bogens 4 aus dem neuen Stapel 76 und dem Tuch 60 entsteht.Subsequently, the complete first sheet stack 30 together with the pallet 12th carried away. Simultaneously with the continuing continuous lowering the separating jaw 28 and the auxiliary table 58 to the upper edge 16 of the new Stack 76 to keep unchanged from the feed belt 2, a new Palette 86 brought from below to the auxiliary table 58. Previously, the Vacuum in the cavity 24 of the front-end 8 canceled to another Lowering the new stack 76 does not hinder. In the illustrated embodiment is shown in FIG. 8, the blowing out of air from the auxiliary table 58 to stopped this time. Alternatively, however, the purging of air from the Help table 58 continue until the auxiliary table 58 from the in Fig. 8 retracted position shown in its position shown in FIG. 9 has been. This retraction of the auxiliary table 58 runs according to the Pushing in the auxiliary table 58. Also when pulling out the auxiliary table 58, the cloth 60 is unwound on the auxiliary table 58, that no relative movement between the bottom 72 of the lowermost sheet 4 from the new stack 76th and the cloth 60 is formed.

Die Fig. 9 zeigt den nächsten Schritt, bei dem die neue Palette 36 an die von dem Hilfstisch 58 verlassene Position gemäß Fig. 8 gebracht wird. Das bedeutet, daß der Abstand zwischen der Unterseite 72 des untersten Bogens 4 aus dem neuen Stapel 76 und der neuen Palette 86 auf ein Minimum verringert wird. Gleichzeitig mit dem Heranfahren der neuen Palette 86 an den neuen Stapel 76 wird gemäß dem Pfeil 88 in der Fig. 9 die Trennbacke 28 aus der Lücke 68 zwischen dem neuen Stapel 76 und der neuen Palette 86 herausgezogen und der Stapel 76 auf dieser abgelegt, wie es in Fig. 10 dargestellt ist. Um dieses Herausziehen der Trennbacke 28 aus der Lücke 68 zu erleichtern, wird gemäß den Pfeilen 90 Luft durch die Öffnungen 46 in der Trennbacke 28 durch Erzeugung eines Überdruckes in dem Hohlraum 50 der Trennbacke 28 gegen die Unterseite 72 des untersten Bogens 4 des neuen Stapels 76 geblasen. Auf diese Weise kommt es zu einer möglichst geringen Reibung zwischen der Unterseite 72 des untersten Bogens 4 des neuen Stapels 76 und der Oberseite 44 der Trennbacke 28. Dies vermeidet Markierungen auf der Unterseite 72.Fig. 9 shows the next step, in which the new pallet 36 to that of the Help table 58 abandoned position shown in FIG. 8 is brought. It means that the distance between the bottom 72 of the lowermost sheet 4 from the new Stack 76 and the new pallet 86 is reduced to a minimum. simultaneously with the approach of the new pallet 86 to the new stack 76 is according to the arrow 88 in FIG. 9, the separating jaw 28 from the gap 68 between the new stack 76 and the new pallet 86 pulled out and the stack 76 on this filed, as shown in Fig. 10. To pull this out Release jaw 28 to facilitate the gap 68, according to the arrows 90 air through the openings 46 in the separating jaw 28 by generating an overpressure in the cavity 50 of the separating jaw 28 against the bottom 72 of the lowermost Arch 4 of the new stack 76 is blown. This way it comes to a As low as possible friction between the bottom 72 of the lowermost sheet 4 of the new stack 76 and the top 44 of the separating jaw 28. This avoids Markings on the bottom 72.

Nachdem die Trennbacke 28 gemäß Pfeil 92 und der Trennfinger 26 gemäß Pfeil 94 in ihre in der Fig. 1 dargestellten Grundpositionen zurückgefahren wurden, beginnt ein neuer Zyklus.After the separating jaw 28 according to arrow 92 and the separating finger 26 as indicated by arrow 94 have been reduced to their basic positions shown in FIG. 1, begins a new cycle.

Claims (17)

  1. Method for exchanging pallets (12, 86) for stacks of sheets (30, 76) during the continuous conveyance of sheets (4) to the stacking point (6), comprising the steps:
    a pre-determined number of sheets (4) is stacked onto a first pallet (12) at the stacking point (6) for a first stack of sheets (30);
    a separating finger (26) is moved from the rear side in the conveying direction between the first stack of sheets (30) and the subsequent sheets (4);
    a gap (68) is created by means of the separating finger (26) between the first stack of sheets (30) and the subsequent sheets (4);
    an angular separating jaw (28) is moved to the trailing edge of the subsequent sheets and into the gap (68) created by the separating finger (26) between the first stack of sheets (30) and the subsequent sheets (4), the separating jaw comprising a surface (54) associated with the trailing edge (70) of a stack (76) made up of sheets (4) conveyed into the working area of the separating jaw (28) and at which a vacuum may be created;
    the subsequent sheets (4) are sucked against the separating jaw (28);
    the gap (68) between the first stack of sheets (30) and the subsequent sheets (4) held by the separating jaw (28) is enlarged;
    an auxiliary table (58) is moved into the enlarged gap (68);
    the first pallet (12) with the first stack of sheets (30) is conveyed away from under the auxiliary table (58);
    a second empty pallet (86) is moved under the auxiliary table (58) ;
    the auxiliary table (58) is conveyed away;
    the suction of the subsequent sheets (4) against the separating jaw (28) is halted;
    the separating jaw (28) is taken out of the gap (68).
  2. Method according to claim 1, the gap (68) between the first stack of sheets (30) and the subsequent sheets (4) being created by the separating finger (26) being lowered more slowly than the first stack of sheets (30).
  3. Method according to any one of the preceding claims, comprising the step:
    simultaneously with, or after, the insertion of the separating jaw (28) into the gap (68) created by the separating finger (26), the separating finger (26) is taken out of the gap (68).
  4. Method according to any one of the preceding claims, the subsequent sheets (4) being sucked in by gas being sucked in through apertures (46, 56) in the separating jaw facing the sheets (4).
  5. Method according to any one of the preceding claims, the separating jaw (28) sucking in the subsequent sheets (4) on their underside (72).
  6. Method according to any one of the preceding claims, the separating jaw (28) only sucking in the subsequent sheets (4) when a plurality of subsequent sheets (4) have already been conveyed into the working area of the separating jaw (28).
  7. Method according to claim 6, in the working area of the separating jaw (28) the start of a new stack (76) being formed from the subsequent sheets (4) and their trailing edge (70) being sucked in by the separating jaw (28).
  8. Method according to any one of the preceding claims, the subsequent sheets (4) being sucked in by a front aligning member (8), as soon as they form the start of a new stack (76).
  9. Method according to any one of the preceding claims, during the insertion of the auxiliary table (58) at least one belt (60) arranged on its surface being activated such that the relative speed between the belt (60) and the underside (72) of the lowest subsequent sheet (4) is substantially equal to zero.
  10. Method according to any one of the preceding claims, during the insertion of the auxiliary table (58), gas being blown against the underside (72) of the belt (60) by means of the auxiliary table (58).
  11. Device for exchanging pallets (12, 86) for stacks of sheets (30, 76) during the continuous conveyance of sheets (4) to the stacking point (6) with a lowerable stacking platform (12, 86) arranged at the stacking point (6),
    with a separating finger (26) which may be inserted between a first stack of sheets (30) containing a pre-determined number of sheets (4) and subsequent sheets (4), the separating finger (26) being able to be lowered more slowly than the stacking platform (12, 86) to create a gap (68) between the first stack of sheets (30) and the subsequent sheets (4),
    with a separating jaw (28) which may be inserted into the gap (68) created by the separating finger (26) between the first stack of sheets (30) and the subsequent sheets (4), the gap (68) created by the separating finger (26) between the first stack of sheets (30) and the subsequent sheets (4) being able to be enlarged by means of the separating jaw (28), with an auxiliary table (58) which may be inserted into the enlarged gap (68),
    the separating jaw comprising suction means (46, 50, 52, 56) by means of which at least one of the subsequent sheets (4) may be sucked in,
    characterised in that the separating jaw (28) is of angular construction, the separating jaw comprising a surface (54) associated with the trailing edge (70) of a stack (76) made up of sheets (4) conveyed into the working area of the separating jaw (28) and at which a vacuum may be created.
  12. Separating jaw for a device (1) for exchanging pallets (12, 86) for stacks of sheets (30, 76) during the continuous conveyance of sheets (4) to the stacking point (6), characterised by apertures (46, 56) by means of which a vacuum may be created in the vicinity of the separating jaw (28),
    characterised in that the separating jaw (28) is of angular construction, the separating jaw comprising a surface (54) associated with the trailing edge (70) of a stack (76) made up of sheets (4) conveyed into the working area of the separating jaw (28) and at which the vacuum may be created.
  13. Separating jaw according to claim 12, the separating jaw (28) comprising a surface (44) associated with the underside (72) of sheets (4) conveyed into the working area of the separating jaw (28) and at which the vacuum may be created.
  14. Separating jaw according to either claim 12 or 13, gas being able to be sucked in through the apertures (46, 56) to create the vacuum.
  15. Separating jaw according to any one of claims 12 to 14, gas being able to be blown out through the apertures (46) to create overpressure on the surface (44) of the separating jaw (28).
  16. Device according to claim 11, the auxiliary table (58) comprising apertures through which gas may be blown to create overpressure in the vicinity of the auxiliary table (58), characterised in that at least the surface of the auxiliary table (58) facing the sheets (4) conveyed onto the auxiliary table (58) is formed from a fabric (60) which is substantially impermeable to gas.
  17. Device according to claim 16, the fabric (60) being movable relative to the auxiliary table (58) such that when inserting the auxiliary table (58) under a stack of sheets (76), the relative speed between the underside (72) of the stack of sheets (76) and the fabric (60) is substantially equal to zero.
EP00940263A 1999-06-21 2000-05-23 Method and device for changing sheet stack pallets Expired - Lifetime EP1196344B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19928367A DE19928367A1 (en) 1999-06-21 1999-06-21 Handling of stacked sheet materials has a facility for stacking and separating into selected stack size
DE19928367 1999-06-21
PCT/EP2000/004689 WO2000078657A1 (en) 1999-06-21 2000-05-23 Method and device for changing sheet stack pallets

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EP1196344A1 EP1196344A1 (en) 2002-04-17
EP1196344B1 true EP1196344B1 (en) 2005-12-21

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US (1) US6481952B2 (en)
EP (1) EP1196344B1 (en)
CN (1) CN1218863C (en)
AT (1) ATE313509T1 (en)
AU (1) AU773902B2 (en)
CA (1) CA2375238C (en)
DE (2) DE19928367A1 (en)
ES (1) ES2252015T3 (en)
PT (1) PT1196344E (en)
WO (1) WO2000078657A1 (en)
ZA (1) ZA200110492B (en)

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EP1196344A1 (en) 2002-04-17
AU5525200A (en) 2001-01-09
CA2375238A1 (en) 2000-12-28
WO2000078657A1 (en) 2000-12-28
CA2375238C (en) 2007-01-16
ZA200110492B (en) 2003-03-20
DE50011914D1 (en) 2006-01-26
ATE313509T1 (en) 2006-01-15
US20020084578A1 (en) 2002-07-04
AU773902B2 (en) 2004-06-10
DE19928367A1 (en) 2000-12-28
CN1218863C (en) 2005-09-14
CN1356956A (en) 2002-07-03
ES2252015T3 (en) 2006-05-16
PT1196344E (en) 2006-05-31
US6481952B2 (en) 2002-11-19

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