EP2653420B1 - Method for sheet transfer and punching machine with gripper transport system - Google Patents

Method for sheet transfer and punching machine with gripper transport system Download PDF

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Publication number
EP2653420B1
EP2653420B1 EP13158876.6A EP13158876A EP2653420B1 EP 2653420 B1 EP2653420 B1 EP 2653420B1 EP 13158876 A EP13158876 A EP 13158876A EP 2653420 B1 EP2653420 B1 EP 2653420B1
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EP
European Patent Office
Prior art keywords
sheet
gripper
punching
transport system
sheets
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Application number
EP13158876.6A
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German (de)
French (fr)
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EP2653420A2 (en
EP2653420A3 (en
Inventor
David Ehrbar
Andreas MÜLLER
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Masterwork Machinery Co Ltd
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Masterwork Machinery Co Ltd
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Publication of EP2653420A2 publication Critical patent/EP2653420A2/en
Publication of EP2653420A3 publication Critical patent/EP2653420A3/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
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B65H5/085—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers by combinations of endless conveyors and grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B65H5/14—Details of grippers; Actuating-mechanisms therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/42—Die-cutting

Definitions

  • the invention relates to a method for transferring sheets according to claim 1 and a sheet punching and / or embossing machine according to the preamble of claim 3.
  • the cutting is referred to with closed geometric blank forms that can be circular, oval or polygonal and imaginary shapes of all kinds. Also the practices practiced in print finishing, such as punching with punch, corner punching and register punching are counted to this area.
  • the punching takes place against a punching pad or against stamp, in some cases it is also shearing operations.
  • Plastic, film, paper, cardboard, cardboard or corrugated board packaging materials are mainly stamped in sheet format.
  • Such a flat bed punch is for example from the DE 30 44 083 A1 and the US 7,658,378 B2 known.
  • the two tables are equipped with cutting and scoring tools or corresponding counter tools, with which punched out of the cyclically guided between the table surface sheet benefits and at the same time pressed the necessary for clean folding grooves. In the subsequent breakout the waste is removed by machine tools. Depending on the equipment of the machine finally the punched benefits can be separated in a designatedWhentrenn arthritis.
  • the sheets In order to allow processing of the sheets in the punching machine with high accuracy, the sheets must be aligned prior to transfer from a feeder to the transport system.
  • the aligned sheet can be aligned and handed over only when the gripper bar of the gripper carriage reaches the sheet running plane and the trailing edge of the gripper carriage - as viewed in the sheet transport direction - downstream of the sheet leading edge of a sheet to be aligned. This is the case only during the brief stoppage of the transport system. There is only a very small time window available for alignment and transfer.
  • DE 23 37 210 A1 discloses a sheet punching and / or embossing machine with a bottom feeder, at least one processing station and a sheet transport system with intermittently rotating gripper carriage for transporting the sheet.
  • the object of the present invention is to describe a method for transferring sheets in a sheet punching and / or embossing machine and to provide such a machine which at least partially overcomes the disadvantages of the prior art and a larger time window for sheet alignment and sheet transfer grant.
  • This object is achieved by a method for transferring sheets in a sheet punching machine according to claim 1 and by a sheet punching and / or embossing machine with the features of claim 3 for carrying out the method.
  • the invention relates to a method for transferring sheets, in particular of paper, cardboard or plastic from a sheet feeder of a sheet dance and / or embossing machine, in particular as described below, to grippers of intermittent, discontinuously rotating gripper carriage of a sheet transport system of Bogenstanz- and / or - Embossing machine in a sheet transfer point, wherein a respective gripper has a gripper pad and a gripper lever.
  • a sheet fed through the sheet feeder In a first step, a sheet fed through the sheet feeder. Then, in another step, the arc is aligned in the circumferential, lateral and oblique directions.
  • the gripper carriage grippers open: either by pivoting lower gripper levers below the sheet travel plane or by moving lower gripper pads to a retracted position. Then a collision-free retraction of the gripper carriage takes place in the sheet transfer point. The retraction of gripper carriage and bow in the sheet transfer point can also be done in particular at the same time. In the sheet transfer point of the gripper carriage is stopped. After alignment of the sheet, the grippers are closed and the sheet can be transported by moving the gripper carriage through the machine.
  • the inventive method allows a Sheet can be transported earlier in the sheet transfer point and thus a larger time window for aligning the sheet is available, with the following advantages: Due to the earlier retraction remains until the gripper close an enlarged time window, which can be used for an exact alignment of the sheet. Thus, due to the larger time window, the invention permits a more accurate alignment of the sheets and thus also subsequent sheet processing of higher register quality.
  • the invention also relates to a sheet punching and / or embossing machine.
  • the sheet dancing and / or embossing machine according to the invention is used to process sheets of especially paper, cardboard or plastic and in particular the above-described method for transferring sheets and the machine has a sheet feeder, at least one processing station and a sheet transport system with intermittent, discontinuous rotating Gripper carriage for transporting the sheets in a sheet travel plane through the sheet dance and / or embossing machine.
  • a respective gripper carriage has a plurality of grippers for gripping the sheet and the sheets are transferred at a sheet transfer point from the feeder to the meantime temporarily stationary sheet transport system.
  • a respective gripper has a particular fixed gripper pad and a gripper lever pivotable for opening or closing, wherein a respective gripper pad when circulating in the sheet transport system an inner trajectory and wherein a respective gripper lever describes an outer trajectory when circulating in the sheet transport system.
  • a respective gripper has a displaceable gripper seat and a gripper lever pivotable for opening or closing.
  • a respective gripper lever describes when circulating in the sheet transport system an inner trajectory and a respective gripper pad describes when circulating in the sheet transport system an outer trajectory.
  • the gripper pad is displaceable in the region of the sheet transfer point for further opening of the gripper in a retracted position. This ensures that a respective sheet can be moved earlier in the sheet transfer point, without causing a collision of the sheet with the grippers. Due to the earlier retraction remains an enlarged window of time until the end of the gripper, which can be used for an exact alignment of the sheet. Thus, due to the larger time window, the invention permits a more accurate alignment of the sheets and thus also subsequent sheet processing of higher register quality.
  • the sheet punching and / or embossing machine has at least one control cam for triggering the pivoting movement of the gripper lever or for triggering the displacement movement of the gripper support.
  • FIG. 1 is the basic structure of a sheet punching and embossing machine 100 for punching, breaking,directionalally and storing sheets of paper, cardboard, Plastic and the like shown.
  • the punching and embossing machine 100 has a feeder 1, a punching station 2, a breaking station 3 and a boom 4 with storage and depaneling station, which are supported and enclosed by a common machine housing 5 and driven by a main drive 17. From one side, the so-called operator side, the processing stations 2, 3, 4 are accessible; On the opposite side, the so-called drive side, there is the drive train of the sheet punching and embossing machine 100.
  • a machine control 15 controls the processes within the punching machine 100.
  • the sheets 6 are separated by a feeder 1 from a stack by a so-called suction head 18, fed to the sheet transfer point U the sheet transport system 7 and gripped by gripper bars of a gripper carriage 8 grippers 80 at its front edge and intermittently in the sheet transport direction B through the various stations , 3 and 4 of the punching and embossing machine 100 pulled.
  • the gripper 80 can be opened and closed by a control cam 40, not shown.
  • the sheet transport system 7 has a plurality of gripper carriages 8, so that a plurality of sheets 6 can be processed simultaneously in the various stations 2, 3 and 4.
  • a respective gripper carriage 8 has a plurality of grippers 80 distributed over its width.
  • the gripper carriage 8 can be driven by a chain drive or in an alternative embodiment by an electromagnetic linear drive with traveling wave motors, such as in the DE 20 2007 012 349 U1 described.
  • the punching station 2 consists of a lower crucible, a so-called under table 9, and an upper crucible, a so-called upper table 10.
  • the upper table 10 is vertically reciprocally mounted and provided with an upper tool 30 with punching and Rillmessern.
  • the lower table 9 is fixedly mounted in the machine frame and provided with a counter-plate 20 to the punching and Rillmessern. Alternatively, the upper table 10 fixed and the lower table 9 may be moved.
  • embossing tools in particular in the form of so-called embossing dies, are used instead of the punching and scoring tools.
  • the gripper carriage 8 transports the sheet 6 from the punching and embossing station 2 in the subsequent breaking station 3, which is equipped with breakout tools 21, 23.
  • the breaking station 3 the waste pieces 11 which are not required are pushed out of the sheet 6 downward with the aid of the breaking-out tools 21, 23, whereby the waste pieces 11 fall into a carriage-like container 12 inserted below the station.
  • the boom 4 may also include a pallet 13, on which the individual sheets 6 or benefits in the form of a stack 14 are stacked, so that after reaching a certain stack height, the pallet 13 with the Sheet stack 14 can be moved away from the area of the punching and embossing machine 100.
  • auxiliary stacking devices may be used.
  • a gripper 80 is shown according to the prior art, as it is used in commercial flat bed sheet punching.
  • the gripper 80 has a gripper pad 81 and a gripper lever 82.
  • the gripper lever 82 is pivotally mounted about a pivot bearing 84.
  • the gripper lever 82 is spring-loaded by means of a spring 83.
  • the gripper pad 81 is fixed. When rotating the gripper 80 in the sheet transport system 7, the gripper pad 81 describes an outer and the gripper lever 82 an inner trajectory.
  • FIGS. 3a, 3b, 3c Alternative embodiments of a gripper 80 are shown.
  • both the gripper pad 81 and the gripper lever 82 can perform a pivotal movement s about the pivot bearing 84.
  • the movement for opening the gripper 80 is tongs-like.
  • the gripper pad 81 is sprung by means of a spring 83, whereby a compensation at different sheet thicknesses is made possible.
  • the gripper pad 81 describes an inner and the gripper lever 82 an outer trajectory.
  • the gripper pad 81 is designed so flexible that it can perform a thickness compensation for sheets of greater thickness, such as corrugated cardboard. For this purpose, the gripper support 81 is bent slightly upwards.
  • a third embodiment is the in Fig. 3c illustrated variant of the invention: the gripper lever 82 is articulated to a pivot bearing 84 and can perform a pivoting movement s against the spring force of a spring 83. This allows a thickness compensation.
  • the gripper pad 81 is slidable and can be moved by a sliding movement v in a retracted position, whereby the gripper 80 can be opened further.
  • the gripper lever 82 describes an inner and the gripper pad 81 an outer trajectory.
  • FIGS. 4a and 4b The advantages described by the use of in the FIGS. 3a, 3b, 3c shown gripper 80 and the inventive method yield.
  • Fig. 4a the situation is shown when a gripper carriage 8 is retracted with its grippers 80 (not labeled) on its trajectory of the sheet transport system 7 in the sheet transfer point U.
  • the gripper 80 are opened, which z. B. can be effected by a trajectory 40, not shown here.
  • a sheet 6 can also be introduced into the sheet transfer point U in the sheet transport direction B, without the sheet 6 and grippers colliding.
  • the element with a tip closest to the arc 6 may either be a gripper pad 81 (cf. Fig. 3c ) or a gripper lever 82 (see. Fig. 3a and 3b ) act, in each case to the element which describes an outer trajectory when circulating in the sheet transport system and thus cuts the sheet transport plane E when entering the sheet transfer point U.
  • a gripper pad 81 cf. Fig. 3c
  • a gripper lever 82 see. Fig. 3a and 3b
  • Fig. 4b the situation is shown when the gripper carriage 8 is retracted with its grippers 80 in the sheet transfer point U and was stopped there.
  • the sheet 6 is also retracted in the sheet transfer point U and can - even during the retraction of the gripper carriage - be aligned in all three degrees of freedom.
  • this sheet alignment serves a not-shown, the expert but well-known system for sheet alignment.
  • the sheet 6 can be retracted earlier by the further opening of the gripper 80 in the sheet transfer point U.
  • the sheet 6 can only be finely aligned when the gripper carriage 8 has passed through the sheet transport plane E with its grippers 80, it is crucial that the gripper carriage 8 - as viewed in the sheet transport direction T - reaches and passes through the sheet transport plane as far as possible downstream, ie cuts. Then the time window is the largest, which is available for carrying out the fine positioning available and by the further movement of the gripper carriage 8, so the machine cycle is limited. Thus, a most accurate alignment of the sheet 6 is allowed and a registration-accurate processing of the sheet 6 in the subsequent processing stations 2, 3, 4 of the sheet punching machine 100 causes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Making Paper Articles (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Übergeben von Bogen gemäß Anspruch 1 und eine Bogenstanz- und/oder - prägemaschine gemäß dem Oberbegriff von Anspruch 3.The invention relates to a method for transferring sheets according to claim 1 and a sheet punching and / or embossing machine according to the preamble of claim 3.

Stand der TechnikState of the art

Als Stanzen wird das Schneiden mit in sich geschlossenen geometrischen Zuschnittsformen bezeichnet, die kreisförmig, oval oder mehreckig sowie Phantasieformen aller Art sein können. Auch die in der Druckweiterverarbeitung geübten Praktiken, wie Stanzen mit Locheisen, Eckenabstoßen und Registerstanzen werden zu diesem Bereich gezählt. Die Stanzung erfolgt gegen eine Stanzunterlage oder gegen Stempel, teilweise sind es auch Schervorgänge. Verpackungsmaterialien aus Kunststoff, Folienmaterial, Papier, Karton, Pappe oder Wellpappe werden hauptsächlich im Bogenformat gestanzt.As punching the cutting is referred to with closed geometric blank forms that can be circular, oval or polygonal and imaginary shapes of all kinds. Also the practices practiced in print finishing, such as punching with punch, corner punching and register punching are counted to this area. The punching takes place against a punching pad or against stamp, in some cases it is also shearing operations. Plastic, film, paper, cardboard, cardboard or corrugated board packaging materials are mainly stamped in sheet format.

Beim Stanzvorgang können zusätzlich aber auch Rilllinien oder Blindprägungen in den Nutzen eingebracht werden. Dieser komplexe Prozess macht es unabdingbar, die Bogen einzeln zu stanzen. Da es sich bei den Endprodukten um anspruchsvolle Verpackungen hinsichtlich technischer und graphischer Ausführung handelt (etwa Verpackungen für Kosmetik, Zigaretten, Pharmazie, Lebensmittel, etc.), werden besondere Anforderungen nicht nur an die Verpackungsmaterialien selbst gestellt, sondern es sind für optimale Resultate auch Stanzwerkzeuge mit geringsten Toleranzen und äußerst präzise und zuverlässig arbeitende Stanzmaschinen erforderlich. Diesen Ansprüchen wird das Flachbettstanzen am besten gerecht. Dabei werden die gedruckten und auf einer Palette gestapelten Bogen der Stanzmaschine zugeführt. In der Maschine werden in einer Ausrichteinrichtung die zu stanzenden Bogen passgenau ausgerichtet, von einem Greiferwagen übernommen und exakt in der Stanzeinrichtung zwischen einem fest gelagerten Untertisch und einem über einen Kniehebel oder Exzentergetriebe vertikal bewegbaren Obertisch positioniert.When punching but also creasing lines or blind embossing can be introduced into the benefit. This complex process makes it indispensable to punch the sheets individually. Since the end products are sophisticated packaging in terms of technical and graphic design (such as packaging for cosmetics, cigarettes, pharmacy, food, etc.), special requirements are not only placed on the packaging materials themselves, but are also punching tools for optimum results required with the smallest tolerances and extremely precise and reliable punching machines. Flatbed punching best meets these demands. The printed sheets stacked on a pallet are fed to the punching machine. In the machine, the sheets to be punched are precisely aligned in an alignment device, taken over by a gripper carriage and positioned exactly in the punching device between a fixed undercounter and a vertical over a knee lever or eccentric upper table.

In bekannten Bogenstanz- und Prägemaschinen, die zum Stanzen, Prägen, Ausbrechen, ggfs. Nutzentrennen und Ablegen von Bogen aus Papier, Pappe und der gleichen eingesetzt werden, ist es bekannt die Bogen mittels Greiferwagen durch die einzelnen Stationen der Maschine zu bewegen. Ein jeweiliger Greiferwagen besitzt eine Greiferbrücke, an der Greifer befestigt sind, die die Bogen an einem vorderen Ende ergreifen. Ein Greiferwagen besitzt weiterhin seitliche Fahrwagen, welche mit endlosen Ketten des Transportsystems verbunden sind und wodurch die Greiferwagen durch die Maschine bewegt werden. Durch diese Art der Bewegung der Bogen durch die Maschine wird ein kontinuierliches Arbeiten in den einzelnen hintereinander angeordneten Stationen der Maschine, insbesondere Stanz-, Ausbrech- und Nutzentrennstation, ermöglicht.In known sheet punching and embossing machines that are used for punching, embossing, breaking, if necessary. Nutzentrennen and storing sheets of paper, cardboard and the same, it is known to move the sheet by means of gripper carriage through the individual stations of the machine. A respective gripper carriage has a gripper bridge, are attached to the gripper, which grip the bow at a front end. A gripper carriage further has lateral carriages, which are connected to endless chains of the transport system and whereby the gripper carriage to be moved by the machine. By this type of movement of the sheet through the machine a continuous work in the individual successively arranged stations of the machine, in particular punching, break-away and Nutzentrennstation allowed.

Eine derartige Flachbettstanze ist beispielsweise aus der DE 30 44 083 A1 und der US 7,658,378 B2 bekannt. Die beiden Tische sind mit Schneid- und Rillwerkzeugen bzw. entsprechenden Gegenwerkzeugen bestückt, mit denen aus dem taktweise zwischen die Tischfläche geführten Bogen die Nutzen ausgestanzt und gleichzeitig die zum sauberen Falten notwendigen Rillen eingedrückt werden. In der nachfolgenden Ausbrecheinrichtung wird der Abfall über Ausbrechwerkzeuge maschinell entfernt. Je nach Ausstattung der Maschine können schließlich die gestanzten Nutzen in einer hierfür vorgesehenen Nutzentrenneinrichtung separiert werden.Such a flat bed punch is for example from the DE 30 44 083 A1 and the US 7,658,378 B2 known. The two tables are equipped with cutting and scoring tools or corresponding counter tools, with which punched out of the cyclically guided between the table surface sheet benefits and at the same time pressed the necessary for clean folding grooves. In the subsequent breakout the waste is removed by machine tools. Depending on the equipment of the machine finally the punched benefits can be separated in a designated Nutzentrenneinrichtung.

Um eine Bearbeitung der Bogen in der Stanzmaschine mit hoher Genauigkeit zu gestatten müssen die Bogen vor der Übergabe von einem Anleger an das Transportsystem ausgerichtet werden. Der ausgerichtete Bogen kann erst dann ausgerichtet und übergeben werden, wenn die Greiferbrücke des Greiferwagens die Bogenlaufebene erreicht und die Hinterkante des Greiferwagens - in Bogentransportrichtung betrachtet - stromabwärtig der Bogenvorderkante eines auszurichtenden Bogens liegt. Dies ist erst während dem kurzzeitigen Stillstand des Transportsystems der Fall. Für die Ausrichtung und Übergabe steht damit nur ein sehr kleines Zeitfenster zur Verfügung.In order to allow processing of the sheets in the punching machine with high accuracy, the sheets must be aligned prior to transfer from a feeder to the transport system. The aligned sheet can be aligned and handed over only when the gripper bar of the gripper carriage reaches the sheet running plane and the trailing edge of the gripper carriage - as viewed in the sheet transport direction - downstream of the sheet leading edge of a sheet to be aligned. This is the case only during the brief stoppage of the transport system. There is only a very small time window available for alignment and transfer.

Dieses kurze Zeitfenster wird für eine exakte Bogenausrichtung als nachteilig erkannt.This short window of time is recognized as detrimental to accurate sheet registration.

DE 23 37 210 A1 offenbart eine Bogenstanz- und/oder - prägemaschine mit einem Bodenanleger, mindestens einer Bearbeitungsstation und einem Bogentransportsystem mit intermittierend umlaufenden Greiferwagen zum Transport der Bogen. DE 23 37 210 A1 discloses a sheet punching and / or embossing machine with a bottom feeder, at least one processing station and a sheet transport system with intermittently rotating gripper carriage for transporting the sheet.

Aufgabenstellungtask

Aufgabe der vorliegenden Erfindung ist es, ein Verfahren zum Übergeben von Bogen in einer eine Bogenstanz- und/oder - prägemaschine zu beschreiben und eine solche Maschine zu schaffen, welche die Nachteile des Standes der Technik zumindest teilweise beheben und ein größeres Zeitfenster für Bogenausrichtung und Bogenübergabe gewähren.The object of the present invention is to describe a method for transferring sheets in a sheet punching and / or embossing machine and to provide such a machine which at least partially overcomes the disadvantages of the prior art and a larger time window for sheet alignment and sheet transfer grant.

Gelöst wird diese Aufgabe durch ein Verfahren zum Übergeben von Bogen in einer Bogenstanzmaschine gemäß Anspruch 1 und durch eine Bogenstanz- und/oder -prägemaschine mit den Merkmalen von Anspruch 3 zur Durchführung des Verfahrens.This object is achieved by a method for transferring sheets in a sheet punching machine according to claim 1 and by a sheet punching and / or embossing machine with the features of claim 3 for carrying out the method.

Gegenstand der Erfindung ist ein Verfahren zum Übergeben von Bogen, insbesondere aus Papier, Pappe oder Kunststoff von einem Bogenanleger einer Bogentanz- und/oder -prägemaschine, insbesondere wie untenstehend beschrieben, an Greifer von intermittierend, diskontinuierlich umlaufenden Greiferwagen eines Bogentransportsystems der Bogenstanz- und/oder - prägemaschine in einer Bogenübergabestelle, wobei ein jeweiliger Greifer eine Greiferauflage und einen Greiferhebel besitzt. In einem ersten Schritt ein Bogen durch den Bogenanleger zugeführt. Danach wird in einem anderen Schritt der Bogen in Umfangs-, Seiten-, und Schrägrichtung ausgerichtet. Während ein Greiferwagen in die Bogenübergabestelle gefahren wird, werden die Greifer des Greiferwagens geöffnet: entweder durch ein Verschwenken von unteren Greiferhebeln unter die Bogenlaufebene oder durch ein Verschieben von unteren Greiferauflagen in eine zurückgezogene Position. Dann erfolgt ein kollisionsfreies Einfahren des Greiferwagens in die Bogenübergabestelle. Das Einfahren von Greiferwagen und Bogen in die Bogenübergabestelle kann dabei insbesondere auch zeitgleich erfolgen. In der Bogenübergabestelle wird nachfolgend der Greiferwagen angehalten. Nach erfolgter Ausrichtung des Bogens werden die Greifer geschlossen und der Bogen kann durch Weiterfahren der Greiferwagen durch die Maschine transportiert werden.The invention relates to a method for transferring sheets, in particular of paper, cardboard or plastic from a sheet feeder of a sheet dance and / or embossing machine, in particular as described below, to grippers of intermittent, discontinuously rotating gripper carriage of a sheet transport system of Bogenstanz- and / or - Embossing machine in a sheet transfer point, wherein a respective gripper has a gripper pad and a gripper lever. In a first step, a sheet fed through the sheet feeder. Then, in another step, the arc is aligned in the circumferential, lateral and oblique directions. As a gripper carriage is driven into the sheet transfer station, the gripper carriage grippers open: either by pivoting lower gripper levers below the sheet travel plane or by moving lower gripper pads to a retracted position. Then a collision-free retraction of the gripper carriage takes place in the sheet transfer point. The retraction of gripper carriage and bow in the sheet transfer point can also be done in particular at the same time. In the sheet transfer point of the gripper carriage is stopped. After alignment of the sheet, the grippers are closed and the sheet can be transported by moving the gripper carriage through the machine.

Wie nachfolgend im Zusammenhang mit den beiden Lösungsvarianten zur Ausgestaltung der Greifer ausgeführt, wird durch das erfindungsgemäße Verfahren ermöglicht, dass ein Bogen früher in die Bogenübergabestelle transportiert werden kann und damit ein größeres Zeitfenster zum Ausrichten des Bogens zur Verfügung steht, mit folgenden Vorteilen: Durch das frühzeitigere Einfahren verbleibt bis zum Greiferschluss ein vergrößertes Zeitfenster, welches für eine exakte Ausrichtung des Bogens genutzt werden kann. Die Erfindung erlaubt also aufgrund des größeren Zeitfensters eine genauere Ausrichtung der Bogen und damit auch nachfolgend eine Bogenbearbeitung von höherer Passerqualität.As explained below in connection with the two solution variants for the design of the gripper, the inventive method allows a Sheet can be transported earlier in the sheet transfer point and thus a larger time window for aligning the sheet is available, with the following advantages: Due to the earlier retraction remains until the gripper close an enlarged time window, which can be used for an exact alignment of the sheet. Thus, due to the larger time window, the invention permits a more accurate alignment of the sheets and thus also subsequent sheet processing of higher register quality.

Die Erfindung betrifft auch eine Bogenstanz- und/oder - prägemaschine. Die erfindungsgemäße Bogentanz- und/oder - prägemaschine dient der Bearbeitung von Bogen aus insbesondere Papier, Pappe oder Kunststoff und insbesondere auch dem obenstehend beschriebenen Verfahren zum Übergeben von Bogen und die Maschine besitzt einen Bogenanleger, mindestens eine Bearbeitungsstation und ein Bogentransportsystem mit intermittierend, diskontinuierlich umlaufenden Greiferwagen zum Transport der Bogen in einer Bogenlaufebene durch die Bogentanz- und/oder -prägemaschine. Dabei besitzt ein jeweiliger Greiferwagen eine Mehrzahl von Greifern zum Ergreifen der Bogen und die Bogen werden an einer Bogenübergabestelle vom Anleger an das währenddessen kurzzeitig stillstehende Bogentransportsystem übergeben. Erfindungsgemäß weist ein jeweiliger Greifer eine insbesondere feststehende Greiferauflage und einen zum Öffnen bzw. Schließen schwenkbaren Greiferhebel auf, wobei eine jeweilige Greiferauflage beim Umlaufen im Bogentransportsystem eine innere Bahnkurve und wobei ein jeweiliger Greiferhebel beim Umlaufen im Bogentransportsystem eine äußere Bahnkurve beschreibt.The invention also relates to a sheet punching and / or embossing machine. The sheet dancing and / or embossing machine according to the invention is used to process sheets of especially paper, cardboard or plastic and in particular the above-described method for transferring sheets and the machine has a sheet feeder, at least one processing station and a sheet transport system with intermittent, discontinuous rotating Gripper carriage for transporting the sheets in a sheet travel plane through the sheet dance and / or embossing machine. In this case, a respective gripper carriage has a plurality of grippers for gripping the sheet and the sheets are transferred at a sheet transfer point from the feeder to the meantime temporarily stationary sheet transport system. According to the invention a respective gripper has a particular fixed gripper pad and a gripper lever pivotable for opening or closing, wherein a respective gripper pad when circulating in the sheet transport system an inner trajectory and wherein a respective gripper lever describes an outer trajectory when circulating in the sheet transport system.

Es erfolgt eine Verschiebebewegung der Greiferauflage. Erfindungsgemäß besitzt ein jeweiliger Greifer eine verschiebliche Greiferauflage und einen zum Öffnen bzw. Schließen schwenkbaren Greiferhebel. Ein jeweiliger Greiferhebel beschreibt beim Umlaufen im Bogentransportsystem eine innere Bahnkurve und eine jeweilige Greiferauflage beschreibt beim Umlaufen im Bogentransportsystem eine äußere Bahnkurve. In vorteilhafter Weise ist die Greiferauflage im Bereich der Bogenübergabestelle zum weiteren Öffnen des Greifers in eine zurückgezogene Position verschiebbar. Dadurch wird erreicht, dass ein jeweiliger Bogen bereits früher in die Bogenübergabestelle gefahren werden kann, ohne dass es zu einer Kollision des Bogens mit den Greifern kommt. Durch das frühzeitigere Einfahren verbleibt bis zum Greiferschluss ein vergrößertes Zeitfenster, welches für eine exakte Ausrichtung des Bogens genutzt werden kann. Die Erfindung erlaubt also aufgrund des größeren Zeitfensters eine genauere Ausrichtung der Bogen und damit auch nachfolgend eine Bogenbearbeitung von höherer Passerqualität.There is a sliding movement of the gripper pad. According to the invention, a respective gripper has a displaceable gripper seat and a gripper lever pivotable for opening or closing. A respective gripper lever describes when circulating in the sheet transport system an inner trajectory and a respective gripper pad describes when circulating in the sheet transport system an outer trajectory. Advantageously, the gripper pad is displaceable in the region of the sheet transfer point for further opening of the gripper in a retracted position. This ensures that a respective sheet can be moved earlier in the sheet transfer point, without causing a collision of the sheet with the grippers. Due to the earlier retraction remains an enlarged window of time until the end of the gripper, which can be used for an exact alignment of the sheet. Thus, due to the larger time window, the invention permits a more accurate alignment of the sheets and thus also subsequent sheet processing of higher register quality.

In vorteilhafter Weiterbildung einer der beiden Lösungsvarianten besitzt die Bogenstanz- und/oder - prägemaschine mindestens eine Steuerkurve zum Auslösen der Schwenkbewegung der Greiferhebel bzw. zum Auslösen der Verschiebebewegung der Greiferauflage.In an advantageous development of one of the two solution variants, the sheet punching and / or embossing machine has at least one control cam for triggering the pivoting movement of the gripper lever or for triggering the displacement movement of the gripper support.

Die beschriebene Erfindung und die beschriebenen vorteilhaften Weiterbildungen der Erfindung stellen auch in beliebiger Kombination miteinander vorteilhafte Weiterbildungen der Erfindung dar.The described invention and the described advantageous developments of the invention are also in any combination with each other advantageous developments of the invention.

Hinsichtlich weiterer Vorteile und in konstruktiver und funktioneller Hinsicht vorteilhafter Ausgestaltungen der Erfindung wird auf die Unteransprüche sowie die Beschreibung von Ausführungsbeispielen unter Bezugnahme auf die beiliegenden Zeichnungen verwiesen.With regard to further advantages and constructive and functional aspects of advantageous embodiments of the invention, reference is made to the dependent claims and the description of embodiments with reference to the accompanying drawings.

Ausführungsbeispielembodiment

Die Erfindung soll an Hand bevorzugter Ausführungsbeispiele noch näher erläutert werden. Es zeigen in schematischer Darstellung

Fig. 1
eine Stanzmaschine
Fig. 2
einen Greifer nach dem Stand der Technik
Fig. 3a - c
alternative vorteilhafte Greifer
Fig. 4a
eine erste Momentaufnahme beim Übergeben eines Bogens
Fig. 4b
eine zweite Momentaufnahme beim Übergeben eines Bogens
The invention will be explained in more detail with reference to preferred embodiments. It show in a schematic representation
Fig. 1
a punching machine
Fig. 2
a gripper according to the prior art
Fig. 3a - c
alternative advantageous gripper
Fig. 4a
a first snapshot when passing an arc
Fig. 4b
a second snapshot while passing a bow

Einander entsprechende Elemente und Bauteile sind in den Figuren mit gleichen Bezugszeichen versehen.Corresponding elements and components are provided in the figures with the same reference numerals.

In Figur 1 ist der prinzipielle Aufbau einer Bogenstanz- und - prägemaschine 100 zum Stanzen, Ausbrechen, Nutzentrennen und Ablegen von Bogen aus Papier, Pappe,
Kunststoff und dergleichen dargestellt. Die Stanz- und Prägemaschine 100 besitzt einen Anleger 1, eine Stanzstation 2, eine Ausbrechstation 3 und einen Ausleger 4 mit Ablage- und Nutzentrennstation, die von einem gemeinsamen Maschinengehäuse 5 getragen und umschlossen werden und von einem Hauptantrieb 17 angetrieben werden. Von einer Seite, der sogenannten Bedienerseite, sind die Bearbeitungsstationen 2, 3, 4 zugänglich; auf der gegenüberliegenden Seite, der sogenannten Antriebsseite, befindet sich der Antriebsstrang der Bogenstanz- und - prägemaschine 100. Eine Maschinensteuerung 15 steuert die Abläufe innerhalb der Stanzmaschine 100.In FIG. 1 is the basic structure of a sheet punching and embossing machine 100 for punching, breaking, Nutzentrennen and storing sheets of paper, cardboard,
Plastic and the like shown. The punching and embossing machine 100 has a feeder 1, a punching station 2, a breaking station 3 and a boom 4 with storage and depaneling station, which are supported and enclosed by a common machine housing 5 and driven by a main drive 17. From one side, the so-called operator side, the processing stations 2, 3, 4 are accessible; On the opposite side, the so-called drive side, there is the drive train of the sheet punching and embossing machine 100. A machine control 15 controls the processes within the punching machine 100.

Die Bogen 6 werden durch einen Anleger 1 von einem Stapel durch einen sogenannten Saugkopf 18 vereinzelt, an der Bogenübergabestelle U dem Bogentransportsystem 7 zugeführt und von an Greiferbrücken eines Greiferwagens 8 befestigten Greifern 80 an ihrer Vorderkante ergriffen und in Bogentransportrichtung B intermittierend durch die verschiedenen Stationen 2, 3 und 4 der Stanz- und Prägemaschine 100 hindurchgezogen. Im Bereich der Bogenübergabestelle U können die Greifer 80 von einer nicht näher dargestellten Steuerkurve 40 geöffnet und geschlossen werden.
Das Bogentransportsystem 7 besitzt mehrere Greiferwagen 8, sodass mehrere Bogen 6 gleichzeitig in den verschiedenen Stationen 2, 3 und 4 bearbeitet werden können. Ein jeweiliger Greiferwagen 8 besitzt eine Mehrzahl über dessen Breite verteilte Greifer 80.
Die Greiferwagen 8 können von einem Kettenantrieb oder in einer alternativen Ausführungsform durch einen elektromagnetischen Linearantrieb mit Wanderfeldmotoren angetrieben werden, wie beispielsweise in der DE 20 2007 012 349 U1 beschrieben.The sheets 6 are separated by a feeder 1 from a stack by a so-called suction head 18, fed to the sheet transfer point U the sheet transport system 7 and gripped by gripper bars of a gripper carriage 8 grippers 80 at its front edge and intermittently in the sheet transport direction B through the various stations , 3 and 4 of the punching and embossing machine 100 pulled. In the area of the sheet transfer point U, the gripper 80 can be opened and closed by a control cam 40, not shown.
The sheet transport system 7 has a plurality of gripper carriages 8, so that a plurality of sheets 6 can be processed simultaneously in the various stations 2, 3 and 4. A respective gripper carriage 8 has a plurality of grippers 80 distributed over its width.
The gripper carriage 8 can be driven by a chain drive or in an alternative embodiment by an electromagnetic linear drive with traveling wave motors, such as in the DE 20 2007 012 349 U1 described.

Die Stanzstation 2 besteht aus einem unteren Tiegel, einem sogenannten Untertisch 9, und einem oberen Tiegel, einem sogenannten Obertisch 10. Der Obertisch 10 ist vertikal hin- und herbewegbar gelagert und mit einem Oberwerkzeug 30 mit Stanz- und Rillmessern versehen. Der Untertisch 9 ist fest im Maschinengestell gelagert und mit einer Gegenplatte 20 zu den Stanz- und Rillmessern versehen. Alternativ kann auch der Obertisch 10 feststehend und der Untertisch 9 bewegt sein. Beim Prägen kommen an Stelle der Stanz- und Rillwerkzeuge Prägewerkzeuge, insbesondere in Form sogenannter Prägeklischees, zum Einsatz.The punching station 2 consists of a lower crucible, a so-called under table 9, and an upper crucible, a so-called upper table 10. The upper table 10 is vertically reciprocally mounted and provided with an upper tool 30 with punching and Rillmessern. The lower table 9 is fixedly mounted in the machine frame and provided with a counter-plate 20 to the punching and Rillmessern. Alternatively, the upper table 10 fixed and the lower table 9 may be moved. In embossing, embossing tools, in particular in the form of so-called embossing dies, are used instead of the punching and scoring tools.

Der Greiferwagen 8 transportiert den Bogen 6 von der Stanz- und Prägestation 2 in die nachfolgende Ausbrechstation 3, die mit Ausbrechwerkzeugen 21, 23 ausgestattet ist. In der Ausbrechstation 3 werden mit Hilfe der Ausbrechwerkzeuge 21, 23 die nicht benötigten Abfallstücke 11 aus dem Bogen 6 nach unten herausgestoßen, wodurch die Abfallstücke 11 in einen unter der Station eingeschobenen wagenartigen Behälter 12 fallen.The gripper carriage 8 transports the sheet 6 from the punching and embossing station 2 in the subsequent breaking station 3, which is equipped with breakout tools 21, 23. In the breaking station 3, the waste pieces 11 which are not required are pushed out of the sheet 6 downward with the aid of the breaking-out tools 21, 23, whereby the waste pieces 11 fall into a carriage-like container 12 inserted below the station.

Von der Ausbrechstation 3 gelangt der Bogen 6 in den Ausleger 4, wo der Bogen 6 entweder nur einfach abgelegt wird, oder aber gleichzeitig eine Trennung der einzelnen Nutzen eines jeweiligen Bogens 6 erfolgt. Dazu besitzt der Ausleger 4 ein Nutzentrennwerkzeug 21, 23. Der Ausleger 4 kann auch eine Palette 13 enthalten, auf der die einzelnen Bogen 6 bzw. Nutzen in Form eines Stapels 14 aufgestapelt werden, so dass nach Erreichen einer bestimmten Stapelhöhe die Palette 13 mit dem Bogenstapel 14 aus dem Bereich der Stanz- und Prägemaschine 100 weggefahren werden kann. Um die Maschine 100 während des Stapeltausches nicht anhalten zu müssen, können Hilfsstapeleinrichtungen zum Einsatz kommen.From the breaking station 3, the sheet 6 enters the boom 4, where the sheet 6 is either simply stored, or at the same time there is a separation of the individual benefits of each sheet 6. The boom 4 may also include a pallet 13, on which the individual sheets 6 or benefits in the form of a stack 14 are stacked, so that after reaching a certain stack height, the pallet 13 with the Sheet stack 14 can be moved away from the area of the punching and embossing machine 100. In order not to have to stop the machine 100 during the stack exchange, auxiliary stacking devices may be used.

In Fig. 2 ist ein Greifer 80 nach dem Stand der Technik dargestellt, wie er bei handelsüblichen Flachbett-Bogenstanzen Verwendung findet. Der Greifer 80 besitzt eine Greiferauflage 81 und einen Greiferhebel 82. Der Greiferhebel 82 ist um ein Schwenklager 84 schwenkbar gelagert. Um Bogen verschiedener Dicke aufnehmen zu können, ist der Greiferhebel 82 mittels einer Feder 83 gefedert. Die Greiferauflage 81 hingegen ist fest. Beim Umlaufen des Greifers 80 im Bogentransportsystem 7 beschreibt die Greiferauflage 81 eine äußere und der Greiferhebel 82 eine innere Bahnkurve.In Fig. 2 a gripper 80 is shown according to the prior art, as it is used in commercial flat bed sheet punching. The gripper 80 has a gripper pad 81 and a gripper lever 82. The gripper lever 82 is pivotally mounted about a pivot bearing 84. To accommodate sheets of different thickness, the gripper lever 82 is spring-loaded by means of a spring 83. The gripper pad 81, however, is fixed. When rotating the gripper 80 in the sheet transport system 7, the gripper pad 81 describes an outer and the gripper lever 82 an inner trajectory.

In den Figuren 3a, 3b, 3c werden alternative Ausgestaltungen eines Greifers 80 dargestellt.In the FIGS. 3a, 3b, 3c Alternative embodiments of a gripper 80 are shown.

Gemäß der ersten Variante, dargestellt in Fig. 3a, können sowohl die Greiferauflage 81 als auch der Greiferhebel 82 eine Schwenkbewegung s um das Schwenklager 84 ausführen. Die Bewegung zum Öffnen des Greifers 80 ist dabei zangenartig.According to the first variant, shown in Fig. 3a , both the gripper pad 81 and the gripper lever 82 can perform a pivotal movement s about the pivot bearing 84. The movement for opening the gripper 80 is tongs-like.

Die Greiferauflage 81 ist mittels einer Feder 83 gefedert, wodurch ein Ausgleich bei verschiedenen Bogendicken ermöglicht wird. Beim Umlaufen im Bogentransportsystem 7 beschreibt die Greiferauflage 81 eine innere und der Greiferhebel 82 eine äußere Bahnkurve.The gripper pad 81 is sprung by means of a spring 83, whereby a compensation at different sheet thicknesses is made possible. When circulating in the sheet transport system 7, the gripper pad 81 describes an inner and the gripper lever 82 an outer trajectory.

In der zweiten Ausführungsvariante, dargestellt in Fig. 3b, ist ausschließlich der Greiferhebel 82 durch eine Schwenkbewegung s um das Schwenklager 84 schwenkbar.In the second embodiment, shown in FIG Fig. 3b , Only the gripper lever 82 is pivotable about the pivot bearing 84 by a pivoting movement s.

Dadurch erfolgt das Öffnen des Greifers 80. Die Greiferauflage 81 ist derart biegsam ausgestaltet, dass sie einen Dickenausgleich für Bogen größerer Dicke, wie beispielsweise Wellpappe, ausführen kann. Dazu wird die Greiferauflage 81 leicht nach oben gebogen.This results in the opening of the gripper 80. The gripper pad 81 is designed so flexible that it can perform a thickness compensation for sheets of greater thickness, such as corrugated cardboard. For this purpose, the gripper support 81 is bent slightly upwards.

Eine dritte Ausführungsvariante ist die in Fig. 3c dargestellte erfindungsgemäße Variante: der Greiferhebel 82 ist an einem Schwenklager 84 angelenkt und kann eine Schwenkbewegung s gegen die Federkraft einer Feder 83 ausführen. Dadurch wird ein Dickenausgleich ermöglicht. Die Greiferauflage 81 ist verschieblich ausgeführt und kann durch eine Verschiebebewegung v in eine zurückgezogene Position verschoben werden, wodurch der Greifer 80 weiter geöffnet werden kann. Beim Umlaufen im Bogentransportsystem beschreibt der Greiferhebel 82 eine innere und die Greiferauflage 81 eine äußere Bahnkurve.A third embodiment is the in Fig. 3c illustrated variant of the invention: the gripper lever 82 is articulated to a pivot bearing 84 and can perform a pivoting movement s against the spring force of a spring 83. This allows a thickness compensation. The gripper pad 81 is slidable and can be moved by a sliding movement v in a retracted position, whereby the gripper 80 can be opened further. When circulating in the sheet transport system, the gripper lever 82 describes an inner and the gripper pad 81 an outer trajectory.

Anhand der Figuren 4a und 4b werden die Vorteile beschrieben, die sich durch die Verwendung der in den Figuren 3a, 3b 3c dargestellten Greifer 80 und das erfindungsgemäße Verfahren ergeben. In Fig. 4a ist die Situation dargestellt, wenn ein Greiferwagen 8 mit seinen Greifern 80 (nicht bezeichnet) auf seiner Bewegungsbahn des Bogentransportsystems 7 in die Bogenübergabestelle U eingefahren wird. Während dem Einfahren des Greiferwagens 8 werden die Greifer 80 geöffnet, was z. B. durch eine hier nicht dargestellte Bahnkurve 40 bewirkt werden kann. Sobald die einem Bogen 6 am nächsten kommende Spitze des Greifers 80 die Bogentransportebene E passiert hat, kann ein Bogen 6 in Bogentransportrichtung B ebenfalls in die Bogenübergabestelle U eingeführt werden, ohne dass es zu einer Kollision von Bogen 6 und Greifern 80 kommt. Bei dem Element mit einer dem Bogen 6 am nächsten kommenden Spitze kann es sich abhängig von der Ausführungsform der Greifer 80 entweder um eine Greiferauflage 81 (vgl. Fig. 3c) oder um einen Greiferhebel 82 (vgl. Fig. 3a und 3b) handeln, in jedem Fall um das Element, welches beim Umlaufen im Bogentransportsystem eine äußere Bahnkurve beschreibt und somit beim Einlaufen in die Bogenübergabestelle U die Bogentransportebene E schneidet. Durch ein Öffnen der Greifer 80 nach unten, d. h. in anderen Worten: durch Öffnen des Greifers 80 von der Umlaufbahn diametral nach außen, wird ermöglicht, dass ein Bogen 6 bereits zu einem früheren Zeitpunkt in die Bogenübergabestelle U eingefahren werden kann. Dies gilt analog auch für die Verschiebebewegung v der Greiferauflage 81 in die zurückgezogene Position. Dadurch wird auch ermöglicht, dass ein Bogen 6 bereits zu einem früheren Zeitpunkt in die Bogenübergabestelle U eingefahren werden kannBased on FIGS. 4a and 4b The advantages described by the use of in the FIGS. 3a, 3b, 3c shown gripper 80 and the inventive method yield. In Fig. 4a the situation is shown when a gripper carriage 8 is retracted with its grippers 80 (not labeled) on its trajectory of the sheet transport system 7 in the sheet transfer point U. During retraction of the gripper carriage 8, the gripper 80 are opened, which z. B. can be effected by a trajectory 40, not shown here. As soon as the tip of the gripper 80 closest to a bend 6 has passed through the sheet transport plane E, a sheet 6 can also be introduced into the sheet transfer point U in the sheet transport direction B, without the sheet 6 and grippers colliding. In the case of the element with a tip closest to the arc 6, depending on the embodiment of the gripper 80, it may either be a gripper pad 81 (cf. Fig. 3c ) or a gripper lever 82 (see. Fig. 3a and 3b ) act, in each case to the element which describes an outer trajectory when circulating in the sheet transport system and thus cuts the sheet transport plane E when entering the sheet transfer point U. By opening the gripper 80 downwards, ie in other words by opening the gripper 80 from the orbit diametrically outwards, it is possible that an arc 6 can already be retracted at an earlier time in the sheet transfer point U. This also applies analogously to the displacement movement v of the gripper support 81 in the retracted position. Thereby It is also possible that a sheet 6 can be retracted at an earlier time in the sheet transfer point U.

In Fig. 4b ist die Situation dargestellt, wenn der Greiferwagen 8 mit seinen Greifern 80 in die Bogenübergabestelle U eingefahren ist und dort angehalten wurde. Der Bogen 6 ist ebenfalls in die Bogenübergabestelle U eingefahren und kann - auch bereits während dem Einfahren des Greiferwagens - in allen drei Freiheitsgraden ausgerichtet werden. Zu dieser Bogenausrichtung dient ein nicht näher dargestelltes, dem Fachmann jedoch allgemein bekanntes System zur Bogenausrichtung. Wie bereits ausgeführt, kann der Bogen 6 durch das weitere Öffnen der Greifer 80 früher in die Bogenübergabestelle U eingefahren werden. Da der Bogen 6 erst dann feinausgerichtet werden kann, wenn der Greiferwagen 8 mit seinen Greifern 80 die Bogentransportebene E durchlaufen hat, ist es entscheidend, dass der Greiferwagen 8 - in Bogentransportrichtung T betrachtet - möglichst weit stromabwärtig die Bogentransportebene erreicht und durchläuft, d.h. schneidet. Dann ist das Zeitfenster am größten, welches für die Durchführung der Feinpositionierung zur Verfügung steht und durch die Weiterbewegung des Greiferwagens 8, also den Maschinentakt, begrenzt wird. Damit wird eine genauestmögliche Ausrichtung des Bogens 6 gestattet und ein passergenaues Bearbeiten der Bogen 6 in den nachfolgenden Bearbeitungsstationen 2, 3, 4 der Bogenstanzmaschine 100 bewirkt.In Fig. 4b the situation is shown when the gripper carriage 8 is retracted with its grippers 80 in the sheet transfer point U and was stopped there. The sheet 6 is also retracted in the sheet transfer point U and can - even during the retraction of the gripper carriage - be aligned in all three degrees of freedom. For this sheet alignment serves a not-shown, the expert but well-known system for sheet alignment. As already stated, the sheet 6 can be retracted earlier by the further opening of the gripper 80 in the sheet transfer point U. Since the sheet 6 can only be finely aligned when the gripper carriage 8 has passed through the sheet transport plane E with its grippers 80, it is crucial that the gripper carriage 8 - as viewed in the sheet transport direction T - reaches and passes through the sheet transport plane as far as possible downstream, ie cuts. Then the time window is the largest, which is available for carrying out the fine positioning available and by the further movement of the gripper carriage 8, so the machine cycle is limited. Thus, a most accurate alignment of the sheet 6 is allowed and a registration-accurate processing of the sheet 6 in the subsequent processing stations 2, 3, 4 of the sheet punching machine 100 causes.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Anlegerinvestor
22
Stanz- und/oder PrägestationPunching and / or embossing station
33
Ausbrechstationstripping
44
Ausleger, ggfs. mit NutzentrennstationOutrigger, if necessary with Nutzentrennstation
55
Maschinengehäusemachine housing
66
Bogenbow
77
BogentransportsystemSheet transport system
88th
Greiferwagen mit GreifernGripper carriage with grippers
99
Untertisch / unterer TiegelLower table / lower crucible
1010
Obertisch / oberer TiegelUpper table / upper crucible
1111
Abfallstücketrimmings
1212
Behältercontainer
1313
Palettepalette
1414
Auslagestapeldelivery pile
1515
Steuerung mit Interface und EingabegerätenControl with interface and input devices
1616
Zuführtisch mit einer Einheit zum Ausrichten der BogenFeed table with a unit for aligning the bow
1717
Hauptantriebmain drive
1818
Saugkopfsuction head
2020
Unterwerkzeuglower tool
2121
Oberwerkzeug mit StempelnUpper tool with punches
2323
Nutzentrenngitter oder Ausbrechbrett (Unterwerkzeug)Dividing grille or stripping board (lower tool)
3030
Oberwerkzeug (Stanzwerkzeug)Upper tool (punching tool)
4040
Steuerkurvecam
8080
Greifergrab
8181
GreiferauflageGripper pad
8282
Greiferhebelgripper lever
8383
Federfeather
8484
Schwenklagerpivot bearing
100100
Flachbett-Bogenstanz- und/oder -prägemaschine (Stanzmaschine)Flatbed sheet punching and / or embossing machine (punching machine)
ss
Schwenkbewegungpivotal movement
vv
Verschiebebewegungdisplacement movement
BB
BogentransportlichtungSheet transport clearing
Ee
BogentransportebeneSheet transport plane
UU
Bogen-ÜbergabestelleArch-over point

Claims (3)

  1. A method for transferring sheets (6), in particular of paper, cardboard or plastic, at a sheet transfer point (U) from a sheet feeder (1) of a sheet punching and/or embossing machine (100) to grippers (80) of intermittently rotating gripper carriages (8) of a sheet transport system (7) of the sheet punching and/or embossing machine (100), wherein each gripper (80) has a gripper pad (81) and a gripper arm (82), comprising the following steps:
    a) feeding a sheet (6) by the sheet feeder (1),
    b) opening the grippers (80) of a gripper carriage (8) by moving (v) lower gripper pads (81) in a retracted position,
    c) conveying the sheet (6) to the sheet transfer point (U) and aligning the sheet (6),
    d) conveying the gripper carriage (8) collision-free to the sheet transfer point (U),
    e) stopping the gripper carriage (8),
    f) closing the grippers (80),
    g) transporting (B) the sheet (6) through the machine (100) by continuously moving the gripper carriages (8).
  2. The method for transferring sheets according to claim 1, characterised in that steps c) and d) are carried out simultaneously.
  3. A sheet punching and/or embossing machine (100) for processing sheets (6), in particular of paper, cardboard or plastic, and particularly for carrying out the method of claim 1 or 2, comprising a sheet feeder (1), at least one processing station (2, 3, 4) and a sheet transport system (7) with intermittently rotating gripper carriages (8) for transporting the sheets (6) in a sheet running plane (E) through the sheet punching and/or embossing machine (100),
    wherein each gripper carriage (8) has a plurality of grippers (80) for gripping the sheets (6), and wherein the sheets are transferred at a sheet transfer point (U) by the feeder (1) to the sheet transport system (7),
    characterised in that
    each gripper (80) has a movable (v) gripper pad (81) and a pivotable (s) gripper arm (82) for opening or closing, wherein each gripper arm (82) when rotating in the sheet transport system (7) describes an inner trajectory, and each gripper pad (81) when rotating in the sheet transport system (7) describes an outer trajectory, and
    the gripper pad (81) is movable in the region of the sheet transfer point (U) for further opening the gripper (80) into a retracted position.
EP13158876.6A 2012-04-16 2013-03-13 Method for sheet transfer and punching machine with gripper transport system Active EP2653420B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012007606A DE102012007606A1 (en) 2012-04-16 2012-04-16 Method for sheet transfer and punching machine with gripper transport system

Publications (3)

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EP2653420A2 EP2653420A2 (en) 2013-10-23
EP2653420A3 EP2653420A3 (en) 2015-05-06
EP2653420B1 true EP2653420B1 (en) 2016-08-24

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017178437A1 (en) * 2016-04-12 2017-10-19 Bobst Mex Sa Gripping member, gripper bar and machine for processing elements in sheet form
CN108203010B (en) * 2016-12-20 2021-03-09 博斯特（上海）有限公司 Gripper lock device and sheet processing apparatus
WO2020035135A1 (en) 2018-08-14 2020-02-20 Mouvent Ag Inkjet printing machine for printing individual sheets
DE102018218385A1 (en) 2018-10-26 2020-04-30 Multivac Sepp Haggenmüller Se & Co. Kg METHOD FOR THE CONTINUOUS FEED OF MATERIAL CUTTINGS IN A PACKING MACHINE

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Publication number Priority date Publication date Assignee Title
DE2337210A1 (en) * 1973-07-21 1975-02-06 Maschf Augsburg Nuernberg Ag Clamping equipment for sheet handling - movable clamping fingers self locked in open position
DE3044083C2 (en) 1980-11-24 1990-05-10 Bobst S.A., Lausanne Punching devices for automatic punching machines for punching sheets of paper, cardboard and the like.
DE9116357U1 (en) * 1991-06-11 1992-07-30 Koenig & Bauer Ag, 8700 Wuerzburg, De
CH690097A5 (en) * 1994-05-04 2000-04-28 Bobst Sa A fastening device of a gripper bar to a bar chains within a machine processing plate elements.
TWI241241B (en) * 2003-10-13 2005-10-11 Bobst Sa Blank diecutting machine
GB0604324D0 (en) * 2006-03-06 2006-04-12 Baron Raymond P Conveyer apparatus and manufacturing apparatus incorporating the same
DE202007012349U1 (en) 2006-07-26 2007-12-13 Heidelberger Druckmaschinen Ag Sheet punching and embossing machine with register alignment
US20080022821A1 (en) * 2006-07-26 2008-01-31 Heidelberger Druckmaschinen Ag Sheet punching and embossing machine
DE102007002154A1 (en) 2007-01-15 2008-07-17 Heidelberger Druckmaschinen Ag Apparatus and method for aligning sheet stacks

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CN103373618B (en) 2017-03-08
ES2601807T3 (en) 2017-02-16
CN103373618A (en) 2013-10-30
EP2653420A2 (en) 2013-10-23
DE102012007606A1 (en) 2013-10-17
EP2653420A3 (en) 2015-05-06

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