EP0751086A2 - Device for removing air inclusions from paper stacks - Google Patents

Device for removing air inclusions from paper stacks Download PDF

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Publication number
EP0751086A2
EP0751086A2 EP96109653A EP96109653A EP0751086A2 EP 0751086 A2 EP0751086 A2 EP 0751086A2 EP 96109653 A EP96109653 A EP 96109653A EP 96109653 A EP96109653 A EP 96109653A EP 0751086 A2 EP0751086 A2 EP 0751086A2
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EP
European Patent Office
Prior art keywords
pressing member
stack
slide
carriage
conveyor track
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.)
Granted
Application number
EP96109653A
Other languages
German (de)
French (fr)
Other versions
EP0751086A3 (en
EP0751086B1 (en
Inventor
Harald Rann
Norbert Rilitz
Holger Schauer
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ECH Will GmbH and Co
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ECH Will GmbH and Co
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Publication date
Application filed by ECH Will GmbH and Co filed Critical ECH Will GmbH and Co
Publication of EP0751086A2 publication Critical patent/EP0751086A2/en
Publication of EP0751086A3 publication Critical patent/EP0751086A3/en
Application granted granted Critical
Publication of EP0751086B1 publication Critical patent/EP0751086B1/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
    • B65H31/30—Arrangements for removing completed piles
    • B65H31/3036—Arrangements for removing completed piles by gripping the pile
    • B65H31/3045—Arrangements for removing completed piles by gripping the pile on the outermost articles of the pile for clamping the 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
    • B65H2301/4224—Gripping piles, sets or stacks of articles
    • B65H2301/42242—Gripping piles, sets or stacks of articles by acting on the outermost articles of the pile for clamping the pile
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S414/00—Material or article handling
    • Y10S414/10—Associated with forming or dispersing groups of intersupporting articles, e.g. stacking patterns
    • Y10S414/12—Associated with forming or dispersing groups of intersupporting articles, e.g. stacking patterns including means pressing against top or end of group

Definitions

  • the invention relates to a device for removing air inclusions from paper stacks with a conveyor track for the stacks, a tongs carriage movable along the conveyor track with at least one tongs gripping a stack in a first position and pulling along the conveyor track into a second position, and a tongs that can be lowered onto the stack Pressing element, which presses the stack for air extrusion while it is pulled relative to the pressing element along the conveyor track.
  • Paper stacks are giants and other layers or stacks of individually or grouped sheets of paper that are transported and processed, for example packaged. Stacks of paper should also be understood to mean stacks of other sheet material that are to be treated like stacks of paper.
  • a device in which a streak in the form of a brush or roller is swung out to remove air pockets on the stack drawn by pliers, which stretches out the trapped air while the stack is being pulled under it.
  • the streak of this device is attached to swivel levers and requires a relatively large amount of lateral space on the machine for its movement.
  • it is placed at different angles on the stack at different angles, so that the spreading effect can differ.
  • the invention has for its object to provide a further device of the type described above.
  • the claims 2 to 5 relate to the arrangement of the pressing member above the stacking conveyor, its guide converging obliquely to the conveyor track, which allows the pressing member to be gently placed on the top of the stack even when the stacks are quickly transported, and the forced guidance of the downward movement of the pressing member depending on the position of the tong carriage until it is placed on a stack.
  • the positive guidance of the pressing member according to claims 4 and 5 ensures that collisions between the pressing member and the pliers are excluded and that nevertheless the placement of the pressing member on the stack is possible immediately in front of the grippers of the pliers gripping the stack.
  • Claim 6 contains special features of the positive guidance of the pressing member by the pliers carriage.
  • a press roller is provided as a pressing member, which rolls freely under the pressure force acting on it on the surface of the stack moving beneath it and thereby reliably extracts the air trapped between the sheets of the stack. Because of the rotating press roll, much higher tensile stresses in the upper sheets of the stack are avoided.
  • Claim 8 relates to the drive of the up and down movement of the pressing member, which at the same time causes a pressure required for the positive guidance by the pliers carriage and the pressing of the pressing member onto the stack also during the downward movement of the pressing member.
  • the claims 9 and 10 relate to configurations of the conveyor track and the pressing member storage, which exert pressure on the stack by means of the pressing member allow and allow a simple format adjustment.
  • Claim 11 relates to a special embodiment of the drive for the up and down movement of the pressing member, with which a high effectiveness is achieved in a small space.
  • the device according to the invention is characterized by a simple structure which requires little space and does not extend far beyond the side edges of the machine.
  • the control of the downward movement of the pressing member is strictly dependent on the movement of the pliers carriage, so that collisions between the pressing member and the pliers are avoided and the pressing operation is placed on the stack immediately before the grippers of the pliers. Regardless of the stack height, the pressing element always sits in the same place, based on the pliers.
  • the setting to different stack heights is very simple.
  • Figures 1 to 3 show a side view of an exemplary embodiment of the device according to the invention in three different working positions.
  • the embodiment of a device according to the invention shown in the drawing has a conveyor track 1, which connects a first position 2 of stacks 3 with a second stack position 4.
  • the first stacking position 2 is, for example, a collection box 6 with side walls 7, in which individual sheets or layers of several sheets of paper or similar material are stacked up in a conventional manner to form stacks 3.
  • the second position 4, which is not shown in the drawing, can be a conveyor which transports the arriving stacks to a subsequent further processing station, for example a packing machine.
  • the conveyor track 1 is assigned a tongs carriage 8 which is guided and driven in the usual way so that it moves in the direction of arrow 9 parallel to the conveyor track 1 in order to stack one or more tongs 11 from the first position 2 into the second position 4 to transport.
  • the tongs 11 consist of a lower gripper 12 and an upper gripper 13 with which they grip the stacks 3 and hold them in place during the transport from the first position 2 to the second position 4.
  • the device consisting of the conveyor track, the first and second stacking positions, and the tongs carriage and tongs, is constructed in a conventional manner and therefore does not require any further description here.
  • DE 41 16 969 A1 (corresponding to US Pat. No. 5,233,815), in which it is described how the stacks in position 1 are accumulated in a row with multiple uses, and are pulled away with pliers next to each other to a second position.
  • a pressing member slide 16 On guide rails 14, which are mounted on both sides of the conveyor track 1 at an angle to the conveyor track converging on a machine frame, not shown, a pressing member slide 16 is guided up and down.
  • the pressing member slide 16 consists of two side carriers 17, each associated with the guide strips 14 and in the exemplary embodiment shown plate-like, which are connected to one another by a cross member 18.
  • a rodless pneumatic cylinder 19, in which one of the guide strips 14 is integrated, is attached to each side support 17.
  • These pneumatic cylinders 19 with the integrated guide rails serve as drives for the pressing member slide 16, which move the slide along the guide rails.
  • Resilient stops 21 and 22 at the two ends of the guide strips act as dampers in the upper and lower positions of the pressing member slide 16.
  • a press member 23 in the form of a press roll 24 is mounted on both sides in the side supports 17.
  • the shaft 26 of the press roll is attached to both side supports 17, so that the press roll extends over the entire working width of the conveyor track 1 and positions 2 and 4.
  • the ends of the shaft 26 are screwed into elongated holes 27 according to the illustrated embodiment of the invention, which allows the position of the press roller 24 to be adjusted to the height of the stack 3.
  • the pliers carriage 8 On the side facing the pressing member slide 16, the pliers carriage 8 has at least one essentially vertical guide surface 28.
  • This guide surface 28 corresponds to substantially vertical sliding surfaces 29 which are provided on the front of the side supports 17.
  • the sliding surfaces 29 are designed as vertical sliding strips, which can slide down at least on the downward movement of the pressing member slide 16 on the guide surfaces 28 of the tong carriage 8.
  • the press organ slide drives which are made of rodless pneumatic cylinders with integrated guide rails, are sold, for example, by the company Origa GmbH Pneumatik, Industriestrasse 8, D-70794 Filderstadt under the name Series P 230.
  • stack 3 so-called giant, is collected from successive sheets of paper or from sheets of similar material. Air is usually trapped between the stacked sheets of paper, making the configuration of the stacks unstable.
  • special measures are therefore required, with which the air between the individual sheets or between sheet layers is pressed out of the stack.
  • only one stack is mentioned in the following process description, although work is generally carried out in a multi-use manner and therefore several stacks are formed side by side, transferred from the first position to the second position with several pliers and treated for air squeezing. So if only one stack is mentioned in the following, this always applies accordingly to the simultaneous treatment of several stacks side by side in a multi-user machine.
  • the tongs 11 of the tongs carriage 8 take over this stack by the grippers 12 and 13 of the tongs 11 gripping the stack on its front top and bottom, as in FIG Figure 1 is shown.
  • the downward movement is supported by the pneumatic cylinders 19, which press the slide on the guide strips 14 downward and thereby maintain reliable contact between the guide surface 28 of the pliers carriage and the sliding surfaces 29 of the pressing member slide 16.
  • the placement of the press roll 24 is shown in Figure 2.
  • the resilient stop 21 dampens the placement, so that the pressing roller 24 is gently touched the surface of the stack 3.
  • a compensating plate 31 is provided on the conveyor track 1 compensates for the height difference between the underside of the stack resting on the lower gripper 12 and the surface of the conveyor track 1.
  • the press roller 24 is always placed on the stack 3 shortly before the upper gripper jaw 13 of the pliers. It is pressed against the surface of the stack by the pneumatic cylinder 19 and rotated by the stack, which is pulled further to the right by means of the pliers 11. While the stack 3 is moved further to the right by the pliers 11 and the guide surface 28 of the pliers carriage moves away from the sliding surfaces 29 of the pressing member slide 16, the press roller 24 rolls under the pressure of the pneumatic cylinder 19 on the surface of the stack 3 and presses it Air contained in the stack.
  • FIG. 3 shows the end position in which the press roll 24 has reached the rear end of the stack 3, from which the air is now largely removed. From this position shown in FIG.
  • the pressing member slide 16 moves back by switching the pneumatic cylinder 19 into its upper starting position, in which it is stopped at the stops 22, which dampen the impact energy of the slide.
  • the pressing member slide 16 with the pressing roller 24 is now ready for another operation, which can begin as soon as the tong carriage 8 has returned to the position shown in FIG. 1, in which its guide surface 28 bears again against the sliding surfaces 29 of the pressing member slide.

Abstract

The press (24) is positioned on a carriage (16) which is moved on at least one guide (14) converging at a slant to the conveyor track (1) in the stack direction (3) of travel. At least the downward movement of the carriage along the guide is controlled by controls (28,29) in relation to the position of the tongs-carriage (8) when the stack is pulled over the conveyor track. The carriage guide and the controls are placed on the press directly behind the pincers (13) of the tongs (11) resting on the stack.

Description

Die Erfindung betrifft eine Vorrichtung zum Entfernen von Lufteinschlüssen aus Papierstapeln mit einer Förderbahn für die Stapel, einem entlang der Förderbahn bewegbaren Zangenwagen mit wenigstens einer einen Stapel in einer ersten Position ergreifenden und entlang der Förderbahn in eine zweite Position ziehenden Zange und einem auf den Stapel absenkbaren Preßorgan, welches zum Luftauspressen auf den Stapel drückt, während dieser relativ zum Preßorgan entlang der Förderbahn gezogen wird.The invention relates to a device for removing air inclusions from paper stacks with a conveyor track for the stacks, a tongs carriage movable along the conveyor track with at least one tongs gripping a stack in a first position and pulling along the conveyor track into a second position, and a tongs that can be lowered onto the stack Pressing element, which presses the stack for air extrusion while it is pulled relative to the pressing element along the conveyor track.

Papierstapel sind Riese und andere Lagen oder Stapel aus einzeln oder gruppenweise aufeinandergeschichteten Papierbögen, die transportiert und weiterverarbeitet, beispielsweise verpackt, werden. Unter Papierstapeln sollen auch Stapel aus anderem Bogenmaterial verstanden werden, die wie Papierstapel zu behandeln sind.Paper stacks are giants and other layers or stacks of individually or grouped sheets of paper that are transported and processed, for example packaged. Stacks of paper should also be understood to mean stacks of other sheet material that are to be treated like stacks of paper.

Der Transport von in Stapeln aufeinandergeschichteten Papierbögen erfordert besondere Vorsicht und Sorgfalt, weil derartige Stapel nicht sehr formstabil sind. Einzelne oder Gruppen von Bögen können leicht verrutschen, so daß der Stapel seine gewünschte, in der Regel quaderförmige Konfiguration verliert. Diese Instabilität der Stapel rührt wesentlich auch daher, daß sich bei der Aufeinanderschichtung der Bögen zwischen diesen Luftschichten bilden. Diese Luft entweicht infolge des Eigengewichts der Bögen zwar nach einiger Zeit von selbst, bei den hohen Produktionsgeschwindigkeiten moderner Papierverarbeitungsmaschinen und den angestrebten kurzen Förderstrecken bleibt jedoch keine Zeit, um die Selbstentlüftung der Papierstapel abzuwarten.The transport of sheets of paper stacked on top of each other requires special care and caution because such stacks are not very dimensionally stable. Individual or groups of sheets can slip easily, so that the stack loses its desired, generally cuboid configuration. This instability of the stacks is essentially due to the fact that when the sheets are stacked on top of one another, these air layers form. This air escapes by itself due to the weight of the sheets, but with the high production speeds of modern paper processing machines and the desired short conveying distances there is no time to wait for the self-venting of the paper stacks.

Daher sind Einrichtungen und Maßnahmen bekannt, um vor oder während des Transports der Stapel deren Entlüftung zu beschleunigen.Therefore, devices and measures are known to accelerate the venting of the stacks before or during transport.

Durch die DE-OS 27 53 668 ist eine Einrichtung bekannt, bei der ein von Zangen erfaßter Stapel unter einer auf den Stapel aufgesetzten Anpreßwalze hindurchgezogen und dabei die zwischen den Bögen eingeschlossene Luft herausgepreßt wird. Diese Schrift enthält keinerlei Angaben darüber, wie einerseits Kollisionen zwischen der sich abwärts bewegenden Auspreßwalze und der Zange vermieden und andererseits das Aufsetzen der Auspreßwalze auf den Stapel möglichst dicht vor den Greiferfingern der Zange gewährleistet werden kann.From DE-OS 27 53 668 a device is known in which a stack gripped by pliers is pulled under a pressure roller placed on the stack and the air trapped between the sheets is pressed out. This document contains no information on how, on the one hand, collisions between the downward moving squeezing roller and the pliers can be avoided and, on the other hand, the placement of the squeezing roller on the stack can be ensured as close as possible to the gripper fingers of the pliers.

Durch die DE 34 03 209 A1 ist eine Einrichtung bekannt, bei der zur Beseitigung von Lufteinschlüssen auf den von Zangen gezogenen Stapel ein Ausstreicher in Form einer Bürste oder Rolle eingeschwenkt wird, der die eingeschlossene Luft ausstreicht, während der Stapel unter ihm hindurchgezogen wird. Der Ausstreicher dieser Einrichtung ist an Schwenkhebeln angebracht und erfordert für seine Bewegung relativ viel seitlichen Bauraum an der Maschine. Außerdem setzt er abhängig von der Höhe der Stapel unter unterschiedlichen Winkeln an unterschiedlichen Stellen auf den Stapeln auf, so daß die Ausstreichwirkung differieren kann.From DE 34 03 209 A1 a device is known in which a streak in the form of a brush or roller is swung out to remove air pockets on the stack drawn by pliers, which stretches out the trapped air while the stack is being pulled under it. The streak of this device is attached to swivel levers and requires a relatively large amount of lateral space on the machine for its movement. In addition, depending on the height of the stack, it is placed at different angles on the stack at different angles, so that the spreading effect can differ.

Der Erfindung liegt die Aufgabe zugrunde, eine weitere Vorrichtung der eingangs beschriebenen Art anzugeben.The invention has for its object to provide a further device of the type described above.

Gelöst wird diese Aufgabe erfindungsgemäß dadurch, daß das Preßorgan bei seiner Abwärtsbewegung vom Zangenwagen geführt ist.This object is achieved according to the invention in that the pressing member is guided by the pincer carriage during its downward movement.

Weitere Fortführungen und vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Further continuations and advantageous refinements of the Invention are specified in the subclaims.

Die Ansprüche 2 bis 5 betreffen die Anordnung des Preßorgans über der Stapelförderbahn, seine schräg zur Förderbahn konvergierende Führung, die auch beim schnellen Transport der Stapel mittels der Zange ein schonendes Aufsetzen des Preßorgans auf die Oberseite der Stapel ermöglicht, und die Zwangsführung der Abwärtsbewegung des Preßorgans in Abhängigkeit von der Position des Zangenwagens bis zum Aufsetzen auf einen Stapel. Insbesondere die Zwangsführung des Preßorgans nach den Ansprüchen 4 und 5 stellt sicher, daß Kollisionen zwischen dem Preßorgan und der Zange ausgeschlossen sind und daß trotzdem das Aufsetzen des Preßorgans auf den Stapel unmittelbar vor den den Stapel erfassenden Greifern der Zange möglich ist. Anspruch 6 enthält spezielle Merkmale der Zwangsführung des Preßorgans durch den Zangenwagen.The claims 2 to 5 relate to the arrangement of the pressing member above the stacking conveyor, its guide converging obliquely to the conveyor track, which allows the pressing member to be gently placed on the top of the stack even when the stacks are quickly transported, and the forced guidance of the downward movement of the pressing member depending on the position of the tong carriage until it is placed on a stack. In particular, the positive guidance of the pressing member according to claims 4 and 5 ensures that collisions between the pressing member and the pliers are excluded and that nevertheless the placement of the pressing member on the stack is possible immediately in front of the grippers of the pliers gripping the stack. Claim 6 contains special features of the positive guidance of the pressing member by the pliers carriage.

Als Preßorgan können herkömmliche Ausstreichwerkzeuge, wie beispielsweise Bürsten, eingesetzt werden. Nach Anspruch 7 ist jedoch als Preßorgan eine Preßwalze vorgesehen, die unter der auf sie wirkenden Andruckkraft auf der Oberfläche des unter ihr hindurchbewegten Stapels frei abrollt und dabei die zwischen den Blättern des Stapels eingeschlossene Luft zuverlässig herauspreßt. Wegen der rotierenden Preßwalze werden wesentlich erhöhte Zugspannungen in den oberen Bögen des Stapels vermieden.Conventional spreading tools, such as brushes, can be used as the pressing member. According to claim 7, however, a press roller is provided as a pressing member, which rolls freely under the pressure force acting on it on the surface of the stack moving beneath it and thereby reliably extracts the air trapped between the sheets of the stack. Because of the rotating press roll, much higher tensile stresses in the upper sheets of the stack are avoided.

Anspruch 8 betrifft den Antrieb der Auf- und Abbewegung des Preßorgans, der gleichzeitig auch bei der Abwärtsbewegung des Preßorgans einen für die Zwangsführung durch den Zangenwagen erforderlichen Druck und die Anpressung des Preßorgans auf die Stapel bewirkt. Die Ansprüche 9 und 10 betreffen Ausgestaltungen der Förderbahn und der Preßorganlagerung, welche die Ausübung von Druck auf die Stapel mittels des Preßorgans erlauben und eine einfache Formatanpassung ermöglichen. Anspruch 11 betrifft eine spezielle Ausgestaltung des Antriebes für die Auf- und Abbewegung des Preßorgans, mit der bei geringem Bauraum eine hohe Wirksamkeit erzielt wird.Claim 8 relates to the drive of the up and down movement of the pressing member, which at the same time causes a pressure required for the positive guidance by the pliers carriage and the pressing of the pressing member onto the stack also during the downward movement of the pressing member. The claims 9 and 10 relate to configurations of the conveyor track and the pressing member storage, which exert pressure on the stack by means of the pressing member allow and allow a simple format adjustment. Claim 11 relates to a special embodiment of the drive for the up and down movement of the pressing member, with which a high effectiveness is achieved in a small space.

Die Vorrichtung nach der Erfindung zeichnet sich durch einen einfachen Aufbau aus, der wenig Bauraum erfordert und nicht weit über die Seitenränder der Maschine greift. Die Steuerung der Abwärtsbewegung des Preßorgans erfolgt in strenger Abhängigkeit von der Bewegung des Zangenwagens, so daß Kollisionen zwischen dem Preßorgan und der Zange vermieden werden und das Preßorgang unmittelbar vor den Greifern der Zange auf den Stapel aufsetzt. Das Preßorgan setzt - bezogen auf die Zangen - unabhängig von der Stapelhöhe immer an derselben Stelle auf. Dabei ist die Einstellung auf verschiedene Stapelhöhen sehr einfach.The device according to the invention is characterized by a simple structure which requires little space and does not extend far beyond the side edges of the machine. The control of the downward movement of the pressing member is strictly dependent on the movement of the pliers carriage, so that collisions between the pressing member and the pliers are avoided and the pressing operation is placed on the stack immediately before the grippers of the pliers. Regardless of the stack height, the pressing element always sits in the same place, based on the pliers. The setting to different stack heights is very simple.

Die Erfindung wird nun anhand der Zeichnung näher erläutert.The invention will now be explained in more detail with reference to the drawing.

Die Figuren 1 bis 3 zeigen eine Seitenansicht eines Auführungsbeispiels der Vorrichtung nach der Erfindung in drei verschiedenen Arbeitspositionen.Figures 1 to 3 show a side view of an exemplary embodiment of the device according to the invention in three different working positions.

Das in der Zeichnung dargestellte Ausführungsbeispiel einer Vorrichtung nach der Erfindung weist eine Förderbahn 1 auf, welche eine erste Position 2 von Stapeln 3 mit einer zweiten Stapelposition 4 verbindet. Die erste Stapelposition 2 ist beispielsweise eine Sammelbox 6 mit Seitenwänden 7, in welcher einzelne Bögen oder Lagen mehrerer Bögen aus Papier oder ähnlichem Material in üblicher Weise zu Stapeln 3 aufgeschichtet werden. Die zweite Position 4 kann, was in der Zeichnung nicht näher dargestellt ist, ein Abförderer sein, welcher die ankommenden Stapel zu einer anschließenden Weiterverarbeitungsstation, beispielsweise einer Packmaschine, transportiert.The embodiment of a device according to the invention shown in the drawing has a conveyor track 1, which connects a first position 2 of stacks 3 with a second stack position 4. The first stacking position 2 is, for example, a collection box 6 with side walls 7, in which individual sheets or layers of several sheets of paper or similar material are stacked up in a conventional manner to form stacks 3. The second position 4, which is not shown in the drawing, can be a conveyor which transports the arriving stacks to a subsequent further processing station, for example a packing machine.

Der Förderbahn 1 ist ein Zangenwagen 8 zugeordnet, der in üblicher Weise so geführt und angetrieben ist, daß er sich in Pfeilrichtung 9 parallel zur Förderbahn 1 bewegt, um mit einer oder mehreren nebeneinander angeordneten Zangen 11 Stapel aus der ersten Position 2 in die zweite Position 4 zu transportieren. Die Zangen 11 bestehen aus einem unteren Greifer 12 und einem oberen Greifer 13, mit welchen sie die Stapel 3 ergreifen und während des Transportes aus der ersten Position 2 in die zweite Position 4 festhalten. Die Vorrichtung, bestehend aus Förderbahn, erster und zweiter Stapelposition sowie Zangenwagen und Zangen ist in üblicher Weise aufgebaut und bedarf daher hier keiner weiteren Beschreibung. Verwiesen sei hierzu auf die DE 41 16 969 A1 (entsprechend US 5 233 815), in welcher beschrieben ist, wie die Stapel in der Position 1 mehrnutzig nebeneinander angesammelt und mit Zangen mehrnutzig nebeneinander zu einer zweiten Position abgezogen werden.The conveyor track 1 is assigned a tongs carriage 8 which is guided and driven in the usual way so that it moves in the direction of arrow 9 parallel to the conveyor track 1 in order to stack one or more tongs 11 from the first position 2 into the second position 4 to transport. The tongs 11 consist of a lower gripper 12 and an upper gripper 13 with which they grip the stacks 3 and hold them in place during the transport from the first position 2 to the second position 4. The device, consisting of the conveyor track, the first and second stacking positions, and the tongs carriage and tongs, is constructed in a conventional manner and therefore does not require any further description here. For this purpose, reference is made to DE 41 16 969 A1 (corresponding to US Pat. No. 5,233,815), in which it is described how the stacks in position 1 are accumulated in a row with multiple uses, and are pulled away with pliers next to each other to a second position.

An Führungsleisten 14, die beidseits der Förderbahn 1 schräg zur Förderbahn konvergierend an einem nicht dargestellten Maschinengestell angebracht sind, ist ein Preßorganschlitten 16 auf- und abbewegbar geführt. Der Preßorganschlitten 16 besteht aus zwei jeweils den Führungsleisten 14 zugeordneten, im gezeigten Ausführungsbeispiel plattenartig ausgebildeten Seitenträgern 17, die durch eine Traverse 18 miteinander verbunden sind. An jedem Seitenträger 17 ist ein kolbenstangenloser Pneumatikzylinder 19 angebracht, in den eine der Führungsleisten 14 integriert ist. Diese Pneumatikzylinder 19 mit den integrierten Führungsleisten dienen als Antriebe für den Preßorganschlitten 16, die den Schlitten an den Führungsleisten entlang bewegen. Federnde Anschläge 21 und 22 an den beiden Enden der Führungsleisten wirken als Dämpfer in der oberen und der unteren Position des Preßorganschlittens 16. ein Preßorgan 23 in Gestalt einer Preßwalze 24 ist an beiden Seiten in den Seitenträgern 17 gelagert. Dazu ist die Welle 26 der Preßwalze an beiden Seitenträgern 17 befestigt, so daß sich die Preßwalze über die gesamte Arbeitsbreite der Förderbahn 1 und der Positionen 2 und 4 erstreckt. Die Enden der Welle 26 sind gemäß dem gezeigten Ausführungsbeispiel der Erfindung in Langlöchern 27 verschraubt, was die Anpassung der Lage der Preßwalze 24 an die Höhe der Stapel 3 erlaubt.On guide rails 14, which are mounted on both sides of the conveyor track 1 at an angle to the conveyor track converging on a machine frame, not shown, a pressing member slide 16 is guided up and down. The pressing member slide 16 consists of two side carriers 17, each associated with the guide strips 14 and in the exemplary embodiment shown plate-like, which are connected to one another by a cross member 18. A rodless pneumatic cylinder 19, in which one of the guide strips 14 is integrated, is attached to each side support 17. These pneumatic cylinders 19 with the integrated guide rails serve as drives for the pressing member slide 16, which move the slide along the guide rails. Resilient stops 21 and 22 at the two ends of the guide strips act as dampers in the upper and lower positions of the pressing member slide 16. a press member 23 in the form of a press roll 24 is mounted on both sides in the side supports 17. For this purpose, the shaft 26 of the press roll is attached to both side supports 17, so that the press roll extends over the entire working width of the conveyor track 1 and positions 2 and 4. The ends of the shaft 26 are screwed into elongated holes 27 according to the illustrated embodiment of the invention, which allows the position of the press roller 24 to be adjusted to the height of the stack 3.

An der dem Preßorganschlitten 16 zugewandten Seite weist der Zangenwagen 8 wenigstens eine im wesentlichen vertikale Führungsfläche 28 auf. Diese Führungsfläche 28 korrespondiert mit im wesentlichen vertikal verlaufenden Gleitflächen 29, die an der Frontseite der Seitenträger 17 vorgesehen sind. Im dargestellten Ausführungsbeispiel der Erfindung sind die Gleitflächen 29 als vertikale Gleitleisten ausgebildet, die zumindest bei der Abwärtsbewegung des Preßorganschlittens 16 an den Führungsflächen 28 des Zangenwagens 8 abwärts gleiten können.On the side facing the pressing member slide 16, the pliers carriage 8 has at least one essentially vertical guide surface 28. This guide surface 28 corresponds to substantially vertical sliding surfaces 29 which are provided on the front of the side supports 17. In the illustrated embodiment of the invention, the sliding surfaces 29 are designed as vertical sliding strips, which can slide down at least on the downward movement of the pressing member slide 16 on the guide surfaces 28 of the tong carriage 8.

Die aus kolbenstangenlosen Pneumatikzylindern mit integrierten Führungsleisten bestehenden Antriebe des Preßorganschlittens werden beispielsweise von der Firma Origa GmbH Pneumatik, Industriestraße 8, D-70794 Filderstadt unter der Bezeichnung Serie P 230 vertrieben.The press organ slide drives, which are made of rodless pneumatic cylinders with integrated guide rails, are sold, for example, by the company Origa GmbH Pneumatik, Industriestrasse 8, D-70794 Filderstadt under the name Series P 230.

In der Sammelbox 6 werden aus aufeinanderfolgenden Papierbögen oder aus Bögen aus ähnlichem Material Stapel 3, sogenannte Riese, angesammelt. Dabei wird zwischen den aufeinandergestapelten Papierbögen in der Regel Luft eingeschlossen, die die Konfiguration der Stapel instabil macht. Um die Stabilität der Stapel für ihren Transport und ihre Weiterverarbeitung, zum Beispiel ihre Verpackung, zu erhöhen und ihre Formbeständigkeit zu verbessern, sind daher besondere Maßnahmen erforderlich, mit denen die Luft zwischen den einzelnen Blättern bzw. zwischen Blattlagen aus dem Stapel herausgepreßt wird. Der Einfachheit halber ist bei der folgenden Ablaufbeschreibung immer nur von einem Stapel die Rede, obwohl in der Regel mehrnutzig gearbeitet wird und daher gleichzeitig nebeneinander mehrere Stapel gebildet, mit mehreren Zangen aus der ersten Position in die zweite Position überführt und zur Luftauspressung behandelt werden. Wenn also im folgenden immer nur von einem Stapel die Rede ist, so gilt das immer entsprechend auch für die gleichzeitige Behandlung mehrerer Stapel nebeneinander in einer mehrnutzigen Maschine.In the collecting box 6, stack 3, so-called giant, is collected from successive sheets of paper or from sheets of similar material. Air is usually trapped between the stacked sheets of paper, making the configuration of the stacks unstable. To increase the stability of the stacks for their transport and further processing, for example their packaging, and to improve their dimensional stability, special measures are therefore required, with which the air between the individual sheets or between sheet layers is pressed out of the stack. For the sake of simplicity, only one stack is mentioned in the following process description, although work is generally carried out in a multi-use manner and therefore several stacks are formed side by side, transferred from the first position to the second position with several pliers and treated for air squeezing. So if only one stack is mentioned in the following, this always applies accordingly to the simultaneous treatment of several stacks side by side in a multi-user machine.

Ist ein Stapel 3 in der ersten Position 2, der Sammelbox 6, komplett, so übernimmt die Zange 11 des Zangenwagens 8 diesen Stapel, indem die Greifer 12 und 13 der Zange 11 den Stapel an seiner vorderen Ober- und Unterseite erfassen, wie das in Figur 1 dargestellt ist. An der frontseitigen Führungsfläche 28 des Zangenwagens liegen die vertikalen Gleitflächen 29 des Preßorganschlittens 16 an, der sich in seiner oberen Position an den Führungsleisten 14 befindet. Wird nun zum Abziehen des Stapels 3 der Zangenwagen 8 in Richtung des Pfeiles 9 nach rechts bewegt, so fährt der Preßorganschlitten 16 an den Führungsleisten 14 schräg zur Förderbahn 1 abwärts, bis die Preßwalze 24 auf die Oberfläche des Stapels 3 aufsetzt. Die Abwärtsbewegung wird von den Pneumatikzylindern 19 unterstützt, die den Schlitten an den Führungsleisten 14 abwärts drücken und dadurch einen sicheren Kontakt zwischen der Führungsfläche 28 des Zangenwagens und den Gleitflächen 29 des Preßorganschlittens 16 aufrecht erhalten. Das Aufsetzen der Preßwalze 24 ist in Figur 2 dargestellt. Der federnde Anschlag 21 dämpft das Aufsetzen, so daß eine schonende Berührung der Preßwalze 24 mit der Oberfläche des Stapels 3 erfolgt. In dem Bereich, in dem die Preßwalze 24 auf den Stapel aufsetzt, ist auf der Förderbahn 1 eine Ausgleichsplatte 31 vorgesehen, die die Höhendifferenz zwischen der auf dem unteren Zangengreifer 12 aufliegenden Stapelunterseite und der Oberfläche der Förderbahn 1 ausgleicht.If a stack 3 in the first position 2, the collection box 6, is complete, the tongs 11 of the tongs carriage 8 take over this stack by the grippers 12 and 13 of the tongs 11 gripping the stack on its front top and bottom, as in FIG Figure 1 is shown. The vertical sliding surfaces 29 of the pressing member slide 16, which is located in its upper position on the guide strips 14, rest on the front guide surface 28 of the pliers carriage. If the pliers carriage 8 is now moved to the right in the direction of arrow 9 to pull off the stack 3, the pressing member slide 16 moves downwards on the guide rails 14 at an angle to the conveyor track 1 until the pressing roller 24 touches the surface of the stack 3. The downward movement is supported by the pneumatic cylinders 19, which press the slide on the guide strips 14 downward and thereby maintain reliable contact between the guide surface 28 of the pliers carriage and the sliding surfaces 29 of the pressing member slide 16. The placement of the press roll 24 is shown in Figure 2. The resilient stop 21 dampens the placement, so that the pressing roller 24 is gently touched the surface of the stack 3. In the area in which the press roll 24 is placed on the stack, a compensating plate 31 is provided on the conveyor track 1 compensates for the height difference between the underside of the stack resting on the lower gripper 12 and the surface of the conveyor track 1.

Wie die Figur 2 deutlich macht, setzt die Preßwalze 24 immer kurz vor der oberen Greiferbacke 13 der Zange auf dem Stapel 3 auf. Sie wird von dem Pneumatikzylinder 19 gegen die Stapeloberfläche gedrückt und von dem Stapel, der mittels der Zange 11 weiter nach rechts abgezogen wird, in Rotation versetzt. Während der Stapel 3 von der Zange 11 weiter nach rechts bewegt wird und sich dabei die Führungsfläche 28 des Zangenwagens von den Gleitflächen 29 des Preßorganschlittens 16 entfernt, rollt die Preßwalze 24 unter dem Druck der Pneumatikzylinder 19 auf der Oberfläche des Stapels 3 ab und preßt die Luft, die in dem Stapel enthalten ist, heraus. Figur 3 zeigt die Endposition, in welcher die Preßwalze 24 das hintere Ende des Stapels 3 erreicht hat, aus dem nun die Luft weitestgehend entfernt ist. Aus dieser in Figur 3 gezeigten Position fährt der Preßorganschlitten 16 durch Umschalten des Pneumatikzylinders 19 zurück in seine obere Ausgangsposition, in welcher er an den Anschlägen 22, die die Aufprallenergie des Schlittens dämpfen, angehalten wird. Der Preßorganschlitten 16 mit der Preßwalze 24 ist nun für einen weiteren Arbeitsgang bereit, der beginnen kann, sobald der Zangenwagen 8 in seine in Figur 1 gezeigte Position zurückgekehrt ist, in welcher seine Führungsfläche 28 an den Gleitflächen 29 des Preßorganschlittens wieder anliegt.As FIG. 2 makes clear, the press roller 24 is always placed on the stack 3 shortly before the upper gripper jaw 13 of the pliers. It is pressed against the surface of the stack by the pneumatic cylinder 19 and rotated by the stack, which is pulled further to the right by means of the pliers 11. While the stack 3 is moved further to the right by the pliers 11 and the guide surface 28 of the pliers carriage moves away from the sliding surfaces 29 of the pressing member slide 16, the press roller 24 rolls under the pressure of the pneumatic cylinder 19 on the surface of the stack 3 and presses it Air contained in the stack. FIG. 3 shows the end position in which the press roll 24 has reached the rear end of the stack 3, from which the air is now largely removed. From this position shown in FIG. 3, the pressing member slide 16 moves back by switching the pneumatic cylinder 19 into its upper starting position, in which it is stopped at the stops 22, which dampen the impact energy of the slide. The pressing member slide 16 with the pressing roller 24 is now ready for another operation, which can begin as soon as the tong carriage 8 has returned to the position shown in FIG. 1, in which its guide surface 28 bears again against the sliding surfaces 29 of the pressing member slide.

Sind Stapel 3 mit einer anderen Höhe zu behandeln, so wird die Befestigung der Welle der Preßwalze 24 in den seitlichen Langlöchern 27 entsprechend verändert. Auf diese Weise wird erreicht, daß die Preßwalze 24 unabhängig von der Stapelhöhe immer in derselben Entfernung vor der Zange auf dem Stapel aufsetzt. Das führt zu reproduzierbaren Arbeitsergebnissen.If stacks 3 are to be treated with a different height, the fastening of the shaft of the press roller 24 in the side elongated holes 27 is changed accordingly. In this way it is achieved that the press roller 24 always touches the stack at the same distance in front of the pliers, regardless of the stack height. This leads to reproducible work results.

Claims (11)

Vorrichtung zum Entfernen von Lufteinschlüssen aus Papierstapeln mit einer Förderbahn für die Stapel, einem entlang der Förderbahn bewegbaren Zangenwagen mit wenigstens einer einen Stapel in einer ersten Position ergreifenden und entlang der Förderbahn in eine zweite Position ziehenden Zange und einem auf den Stapel absenkbaren Preßorgan, welches zum Luftauspressen auf den Stapel drückt, während dieser relativ zum Preßorgan entlang der Förderbahn gezogen wird, dadurch gekennzeichnet, daß das Preßorgan (24) bei seiner Abwärtsbewegung vom Zangenwagen (8) geführt ist.Device for removing air inclusions from paper stacks with a conveyor track for the stacks, a tongs carriage movable along the conveyor track with at least one pair of tongs gripping a stack in a first position and pulling it along the conveyor track into a second position, and a pressing member which can be lowered onto the stack Air squeezing presses on the stack while it is being pulled along the conveyor track relative to the pressing member, characterized in that the pressing member (24) is guided by the pincer carriage (8) during its downward movement. Vorrichtung nach Anspruchs 1, dadurch gekennzeichnet, daß das Preßorgan (24) an einem Schlitten (16) angebracht ist, daß der Preßorganschlitten (16) an wenigstens einer in Förderrichtung (9) der Stapel (3) schräg zur Förderbahn (1) konvergierenden Führung (14) bewegbar ist und daß Steuermittel (28, 29) zum Steuern wenigstens der Abwärtsbewegung des Schlittens an der Führung in Abhängigkeit von der Position des Zangenwagens (8) beim Abziehen eines Stapels über die Förderbahn (1) vorgesehen sind.Apparatus according to claim 1, characterized in that the pressing member (24) is attached to a slide (16), that the pressing member slide (16) on at least one guide converging obliquely to the conveying path (1) in the conveying direction (9) of the stacks (3) (14) is movable and that control means (28, 29) are provided for controlling at least the downward movement of the slide on the guide as a function of the position of the tong carriage (8) when a stack is pulled off via the conveyor track (1). Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Schlittenführung (14) und die Steuermittel (28, 29) das Preßorgan (24) unmittelbar hinter den auf dem Stapel (3) aufliegenden Greifern (13) der Zange (11) aufsetzend ausgebildet und angeordnet sind.Apparatus according to claim 1 or 2, characterized in that the slide guide (14) and the control means (28, 29) form the pressing member (24) directly behind the grippers (13) of the pliers (11) resting on the stack (3) and are arranged. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet daß der Preßorganschlitten (16) in Abhängigkeit von der Zangenbewegung kurvengeführt aus seiner abgehobenen Position in einer auf den Stapel (3) aufgesetzte Position bewegbar ist.Device according to one of claims 1 to 3, characterized in that the pressing member slide (16) can be moved in a curve-guided manner from its raised position in a position placed on the stack (3) depending on the forceps movement. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Preßorganschlitten (16) an seiner dem Zangenwagen (8) zugewandten Frontseite wenigstens eine Kontakteinrichtung (29) aufweist, daß an der dem Schlitten (16) zugewandten Seite des Zangenwagens (8) wenigstens eine im wesentlichen vertikale Führungsfläche (28) vorgesehen ist und daß die Kontakteinrichtung (29) des Schlittens während seiner Abwärtsbewegung bis zum Aufsetzen des Preßorgans (24) auf dem Stapel (3) im wesentlichen vertikal verfahrbar an der Führungsfläche (28) des Zangenwagens (8) anliegt.Device according to one of Claims 1 to 4, characterized in that the pressing member slide (16) has at least one contact device (29) on its front side facing the tong carriage (8), that on the side of the tong carriage (8) facing the carriage (16) at least one essentially vertical guide surface (28) is provided and that the contact device (29) of the slide can be moved substantially vertically on the guide surface (28) of the pliers carriage () during its downward movement until the pressing member (24) is placed on the stack (3). 8) is present. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Kontakteinrichtung (29) des Preßorganschlittens (16) als im wesentlichen vertikal verlaufende Gleitfläche ausgebildet ist.Apparatus according to claim 5, characterized in that the contact device (29) of the pressing member slide (16) is designed as an essentially vertically extending sliding surface. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß als Preßorgan (23) eine am Preßorganschlitten (16) frei drehbar gelagerte Preßwalze (24) vorgesehen ist.Device according to one of claims 1 to 6, characterized in that a pressing roller (24) which is freely rotatably mounted on the pressing member slide (16) is provided as the pressing member (23). Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß dem Preßorganschlitten (16) ein reversierbarer Schlittenantrieb (19) zugeordnet ist, daß der Antrieb den Schlitten (16) während seiner Abwärtsbewegung gegen die Führungsfläche (28) des Zangenwagens (8) drückend, nach dem Aufsetzen des Preßorgans (23) gegen den Stapel (3) pressend und nach dem Durchziehen des Stapels (3) unter dem Preßorgan (23) in seine abgehobene Position nach oben fahrend ausgebildet und angeordnet ist.Device according to one of claims 1 to 7, characterized in that a reversible slide drive (19) is associated with the pressing member slide (16), that the drive presses the slide (16) during its downward movement against the guide surface (28) of the pliers carriage (8) , after the pressing of the pressing member (23) against the stack (3) pressing and after pulling the stack (3) under the pressing member (23) in its raised position designed and arranged to move. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Förderbahn (1) als festes Widerlager für das Anpressen des auf den Stapel (3) aufgesetzten Preßorgans (23) ausgebildet ist.Device according to one of claims 1 to 8, characterized in that the conveyor track (1) acts as a fixed abutment for pressing on the stack (3) Press member (23) is formed. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß das Preßorgan (23) zur Anpassung an verschiedene Stapelhöhen entsprechend verschiebbar am Preßorganschlitten (16) angebracht ist.Device according to one of claims 1 to 9, characterized in that the pressing member (23) is adapted to be displaceably attached to the pressing member slide (16) in order to adapt to different stack heights. Vorrichtung nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, daß als Schlittenantrieb (19) ein kolbenstangenloser Pneumatikzylinder mit integrierter Führungsleiste (14) vorgesehen ist, der selbst Bestandteil des Schlittens (16) ist und dessen Führungsleiste gleichzeitig als Schlittenführung dient.Device according to one of claims 8 to 10, characterized in that a rodless pneumatic cylinder with an integrated guide bar (14) is provided as the slide drive (19), which is itself part of the slide (16) and whose guide bar also serves as a slide guide.
EP96109653A 1995-06-29 1996-06-15 Device for removing air inclusions from paper stacks Expired - Lifetime EP0751086B1 (en)

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EP0751086A3 (en) 1998-01-14
ATE210594T1 (en) 2001-12-15
JPH0925043A (en) 1997-01-28
EP0751086B1 (en) 2001-12-12
DE59608410D1 (en) 2002-01-24
ES2168408T3 (en) 2002-06-16
US5687644A (en) 1997-11-18
JP3618904B2 (en) 2005-02-09

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