EP3763648B1 - Device and method for turning over coating sheets - Google Patents

Device and method for turning over coating sheets Download PDF

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Publication number
EP3763648B1
EP3763648B1 EP20184268.9A EP20184268A EP3763648B1 EP 3763648 B1 EP3763648 B1 EP 3763648B1 EP 20184268 A EP20184268 A EP 20184268A EP 3763648 B1 EP3763648 B1 EP 3763648B1
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EP
European Patent Office
Prior art keywords
coating sheet
over
drawing direction
draw
turned
Prior art date
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EP20184268.9A
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German (de)
French (fr)
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EP3763648A1 (en
Inventor
Florian Barth
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Wemhoener Surface Technologies GmbH and Co KG
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Wemhoener Surface Technologies GmbH and Co KG
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Priority claimed from DE102019128975.0A external-priority patent/DE102019128975A1/en
Application filed by Wemhoener Surface Technologies GmbH and Co KG filed Critical Wemhoener Surface Technologies GmbH and Co KG
Publication of EP3763648A1 publication Critical patent/EP3763648A1/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
    • B65H15/00—Overturning articles
    • 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
    • B65H5/10—Reciprocating or oscillating grippers, e.g. suction or gripper tables
    • 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
    • B65H5/36—Article guides or smoothers, e.g. movable in operation
    • B65H5/38—Article guides or smoothers, e.g. movable in operation immovable in operation
    • 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
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/332—Turning, overturning
    • B65H2301/3321—Turning, overturning kinetic therefor
    • B65H2301/33214—Turning, overturning kinetic therefor about an axis perpendicular to the direction of displacement and parallel to the surface of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/50—Gripping means
    • B65H2405/51—Gripping means oscillating in arcuate paths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/50—Gripping means
    • B65H2405/52—Gripping means reciprocating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/1938—Veneer sheet

Definitions

  • the invention relates to a device and a method for turning a coating sheet placed on a pre-drawing table according to the preambles of claims 1 and 7.
  • the coating sheets In the case of panel coating with sheet material, the coating sheets must be separated from individual sheet stacks, with at least one sheet being placed under and at least one sheet on top of the panel to be coated on a conveying line. However, since the coating sheets only have a decoration on one side, every second coating sheet must be turned over when removing coating sheets stored on a single stack of sheets.
  • EP 3 028 968 B1 A device and a working method for separating and turning individual sheets stored on a stack of sheets are known, EP 3 028 968 B1 , in which a coating sheet is removed from a stack of sheets over its entire surface and is also turned over over its entire surface.
  • This known device is very complex in terms of mechanical engineering and is therefore uneconomical in some areas of application.
  • this known technique has the disadvantage that it cannot achieve the cycle times of a coating press designed as a short-cycle press, so that an undesired loss of time occurs each time a stack of workpieces to be pressed is put together.
  • U.S. 5,845,759 A discloses the preamble of claims 1 and 7 respectively.
  • the trailing edge is also picked up with a squeegee, the sheet is lifted and folded forward in the pulling direction and unrolled in a forward movement.
  • the sheet When the sheet is clamped, it forms an envelope wave running in the pulling direction, which generates bending stress in the material of the coating sheet, which is suddenly discharged at the last moment of the turning process.
  • the sheet edge which is now directed backwards and was previously the front edge, first rises up and then slides backwards over the table surface underneath, which often results in an overloading of the rear edge, which can lead to the coating sheet breaking.
  • the object of the invention is to provide a device and a method for turning over a coating sheet placed on a pre-drawing table, which reliably excludes the risk of damage to the rear edge of a coating sheet or to the coating sheet itself.
  • the device for turning over a coating sheet placed on a pre-drawing table has a contact device for contacting the rear edge of the coating sheet, which has a transverse axis that can move upwards, in the drawing direction, and about a horizontal and transverse to the drawing direction, and is rotatably mounted on a longitudinal guide above the drawing table is, with a support device being arranged in or below the table level of the advance table, with which a coating sheet that has not yet been completely turned before it is in Pulling direction moving cover shaft in the rear cover area can be mechanically or pneumatically supported from below.
  • the coating sheet When the coating sheet is pulled forward or turned, it is supported by the support device, which lifts the coating sheet slightly and thus cancels the weight of the coating sheet, so that the rear edge of the coating sheet is relieved and can relax freely to the rear without the risk that the rear edge is mechanically overloaded and tears or the coating sheet breaks.
  • the support device consists of a support beam running horizontally transversely to the pulling direction, which is designed to be liftable vertically from the table level after the already turned earlier rear edge of the coating sheet has been passed, so that this support is purely mechanical and the movement is carried out via a wide variety of different methods electrical, pneumatic, or hydraulic drives can be generated, which, however, are all constructed considerably more simply than the known prior art, which is complex in terms of mechanical engineering.
  • the support bar can be designed to be raised so far that the former front edge of the coating sheet can be lifted completely from the surface of the pre-drawing table, with the vertical travel of the support bar being advantageously designed to be larger than the diameter of the cover shaft of the coating sheet.
  • this consists of a blowing bar running horizontally transverse to the drawing direction, which is arranged below the table level in the drawing table and by means of which an air flow can be blown in under the coating sheet in front of the cover shaft after the already turned earlier rear edge of the coating sheet has been passed, thus creating an air cushion can be generated, in which case the air flow can advantageously be of such a strength that it can be used to completely lift the former front edge of the coating sheet from the surface of the drawing table, so that the former front edge, which is in the air, can also relax and align backwards in an elastic, flat manner, where the air cushion escapes.
  • the Figures 1-8 each show a pull-out table 1 with a stack of sheets 9 arranged next to it on the right and a longitudinal guide 4 for the pull strips 10; 11 arranged above the pull-out table 1 and the stack of sheets 9.
  • the figures 1 and 5 each show a coating sheet 2 that has already been turned over halfway, with a right-hand turning shaft 6, and figures 2 and 6 a moving one Coating sheet 2 with a coating sheet 2 just barely resting on the previous front side shortly before its end is completely folded over.
  • the figure 7 shows analogous to figure 3 an operating blow bar 8, which creates an air cushion underneath the coating sheet 2, which carries the coating sheet 2 and thus relieves the rear edge to such an extent that the edge is also lifted from the surface of the drawing table 1 here, so that it relaxes elastically flat to the rear and can align, with the air cushion escaping.

Description

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Wenden von einem auf einem Vorziehtisch abgelegten Beschichtungsbogen gemäß den Oberbegriffen der Ansprüche 1 und 7.The invention relates to a device and a method for turning a coating sheet placed on a pre-drawing table according to the preambles of claims 1 and 7.

Bei der Plattenbeschichtung mit Bogenware müssen die Beschichtungsbögen zum Teil von einzelnen Bogenstapeln aus vereinzelt werden, wobei auf einer Förderstrecke mindestens ein Bogen unter und mindestens ein Bogen auf die zu beschichtende Platte gelegt werden. Da die Beschichtungsbögen allerdings nur auf einer Seite mit einem Dekor versehen sind, muss jeder zweite Beschichtungsbogen bei der Abnahme von auf einem einzelnen Bogenstapel bevorrateten Beschichtungsbögen gewendet werden.In the case of panel coating with sheet material, the coating sheets must be separated from individual sheet stacks, with at least one sheet being placed under and at least one sheet on top of the panel to be coated on a conveying line. However, since the coating sheets only have a decoration on one side, every second coating sheet must be turned over when removing coating sheets stored on a single stack of sheets.

Es ist eine Vorrichtung und ein Arbeitsverfahren zum Separieren und Wenden von auf einem Bogenstapel bevorrateten Einzelbögen bekannt, EP 3 028 968 B1 , bei denen ein Beschichtungsbogen vollflächig von einem Bogenstapel abgenommen und auch vollflächig gewendet wird.A device and a working method for separating and turning individual sheets stored on a stack of sheets are known, EP 3 028 968 B1 , in which a coating sheet is removed from a stack of sheets over its entire surface and is also turned over over its entire surface.

Diese bekannte Vorrichtung ist maschinenbautechnisch recht aufwendig und deswegen in einigen Anwendungsbereichen unwirtschaftlich. Zudem ist es an dieser bekannten Technik nachteilig, dass sie nicht die Zykluszeiten einer als Kurztaktpresse ausgebildeten Beschichtungspresse erreichen kann, sodass bei jedem Zusammenlegungsvorgang eines zu verpressenden Werkstückstapels ein unerwünschter Zeitverlust auftritt.This known device is very complex in terms of mechanical engineering and is therefore uneconomical in some areas of application. In addition, this known technique has the disadvantage that it cannot achieve the cycle times of a coating press designed as a short-cycle press, so that an undesired loss of time occurs each time a stack of workpieces to be pressed is put together.

Es ist des Weiteren ein Transportband mit einer Wendevorrichtung für Stoffzuschnitte bekannt, US 5 845 759 A , die jeweils an der Hinterkante aufgenommen, angehoben und gegenüber der Geschwindigkeit des Transportbandes beschleunigt in Transportrichtung um eine ortsfeste Umlenkrolle herumgezogen und dadurch gewendet und anschließend wieder an der ursprünglichen Stelle auf dem Band abgeworfen werden. Ein dünner Beschichtungsbogen aus melaminharzgetränktem Papier würde dabei aber sofort zerstört werden, da er sehr steif und spröde ist. US 5 845 759 A offenbart den Oberbegriff des Anspruchs 1 bzw. 7.Furthermore, a conveyor belt with a turning device for fabric cuts is known, U.S. 5,845,759 A , which are each picked up at the rear edge, lifted and accelerated relative to the speed of the conveyor belt in the transport direction around a stationary deflection roller and thereby turned and then thrown back onto the belt at the original point. However, a thin coating sheet made of melamine resin-impregnated paper would be destroyed immediately because it is very stiff and brittle. U.S. 5,845,759 A discloses the preamble of claims 1 and 7 respectively.

Bei einem weiteren bekannten Verfahren zum Wenden eines vereinzelten Beschichtungsbogens von einem Bogenstapel , EP 3 763 647 A1 , wird ebenfalls die Hinterkante mit einer Saugleiste aufgenommen, der Bogen angehoben und in Ziehrichtung nach vorne umgeschlagen und in einer Vorwärtsbewegung abgerollt. Dabei bildet der Bogen durch seine Einspannung eine mit in die Ziehrichtung laufende Umschlagwelle aus, wobei diese eine Biegespannung im Material des Beschichtungsbogens erzeugt, welche sich im letzten Moment des Wendevorgangs schlagartig entlädt. Dabei richtet sich die nun nach hinten gerichtete, vormals vordere Bogenkante zunächst auf und rutscht dann über die darunter befindliche Tischoberfläche nach hinten, wobei es häufig zu einer Überbelastung der Hinterkante kommt, die zu einem Brechen des Beschichtungsbogens führen kann.In a further known method for turning a single coating sheet from a sheet stack, EP 3 763 647 A1 , the trailing edge is also picked up with a squeegee, the sheet is lifted and folded forward in the pulling direction and unrolled in a forward movement. When the sheet is clamped, it forms an envelope wave running in the pulling direction, which generates bending stress in the material of the coating sheet, which is suddenly discharged at the last moment of the turning process. The sheet edge, which is now directed backwards and was previously the front edge, first rises up and then slides backwards over the table surface underneath, which often results in an overloading of the rear edge, which can lead to the coating sheet breaking.

Aufgabe der Erfindung ist es eine Vorrichtung und ein Verfahren zum Wenden von auf einem auf einem Vorziehtisch abgelegten Beschichtungsbogen zur Verfügung zu stellen, welche die Gefahr einer Beschädigung der Hinterkante eines Beschichtungsbogens oder des Beschichtungsbogens selber sicher ausschließen.The object of the invention is to provide a device and a method for turning over a coating sheet placed on a pre-drawing table, which reliably excludes the risk of damage to the rear edge of a coating sheet or to the coating sheet itself.

Die Lösung dieser Aufgabe erfolgt in Verbindung mit den Merkmalen der Oberbegriffe der Ansprüche 1 und 7 zusammen mit den technischen Merkmalen deren kennzeichnender Teile.This problem is solved in connection with the features of the preambles of claims 1 and 7 together with the technical features of their characterizing parts.

Die Vorrichtung zum Wenden von auf einem auf einem Vorziehtisch abgelegten Beschichtungsbogen weist eine Kontaktvorrichtung zum Kontaktieren der Hinterkante des Beschichtungsbogens auf, welche nach oben, in Ziehrichtung und um eine horizontale und quer zur Ziehrichtung bewegliche Querachse aufweist, die verdrehbar an einer Längsführung über dem Vorziehtisch gelagert ist, wobei in oder unter der Tischebene des Vorziehtisches eine Unterstützungsvorrichtung angeordnet ist, mit der ein noch nicht vollständig gewendeter Beschichtungsbogen noch vor dessen in Ziehrichtung mitwandernde Umschlagwelle in deren hinteren Umschlagbereich von unten mechanisch oder pneumatisch unterstützt werden kann.The device for turning over a coating sheet placed on a pre-drawing table has a contact device for contacting the rear edge of the coating sheet, which has a transverse axis that can move upwards, in the drawing direction, and about a horizontal and transverse to the drawing direction, and is rotatably mounted on a longitudinal guide above the drawing table is, with a support device being arranged in or below the table level of the advance table, with which a coating sheet that has not yet been completely turned before it is in Pulling direction moving cover shaft in the rear cover area can be mechanically or pneumatically supported from below.

Beim Vorziehen, beziehungsweise Wenden des Beschichtungsbogens wird dieser von der Unterstützungsvorrichtung unterstützt, die den Beschichtungsbogen etwas anhebt und damit das Gewicht des Beschichtungsbogens aufhebt, sodass die Hinterkante des Beschichtungsbogens entlastet wird und sich frei nach hinten entspannen kann, ohne dass die Gefahr besteht, das die Hinterkante mechanisch überlastet wird und einreißt oder der Beschichtungsbogen bricht.When the coating sheet is pulled forward or turned, it is supported by the support device, which lifts the coating sheet slightly and thus cancels the weight of the coating sheet, so that the rear edge of the coating sheet is relieved and can relax freely to the rear without the risk that the rear edge is mechanically overloaded and tears or the coating sheet breaks.

Vorteilhafte Ausgestaltung des Gegenstandes der Erfindung ergeben sich mit und in Kombination aus den nachfolgenden Unteransprüchen.Advantageous configurations of the subject matter of the invention result with and in combination from the following dependent claims.

Gemäß einer besonders bevorzugten Ausführungsform der Erfindung besteht die Unterstützungsvorrichtung aus einem quer zur Ziehrichtung horizontal verlaufenden Unterstützungsbalken, der nach dem Überfahren der bereits gewendeten früheren Hinterkante des Beschichtungsbogens gegenüber der Tischebene vertikal daraus anhebbar ausgebildet ist, sodass diese Unterstützung rein mechanisch erfolgt und die Bewegung über unterschiedlichste elektrische, pneumatische, oder hydraulische Antriebe erzeugt werden kann, die jedoch alle erheblich einfacher auch aufgebaut sind als der maschinenbautechnisch aufwendige bekannte Stand der Technik.According to a particularly preferred embodiment of the invention, the support device consists of a support beam running horizontally transversely to the pulling direction, which is designed to be liftable vertically from the table level after the already turned earlier rear edge of the coating sheet has been passed, so that this support is purely mechanical and the movement is carried out via a wide variety of different methods electrical, pneumatic, or hydraulic drives can be generated, which, however, are all constructed considerably more simply than the known prior art, which is complex in terms of mechanical engineering.

Bevorzugterweise kann der Unterstützungsbalken dabei so weit nach oben anhebbar ausgebildet sein, dass die ehemalige Vorderkante des Beschichtungsbogens vollständig mit von der Oberfläche des Vorziehtisches abgehoben werden kann, wobei der vertikale Verfahrweg des Unterstützungsbalkens vorteilhafterweise größer ausgebildet ist als das Durchmessermaß der Umschlagwelle des Beschichtungsbogens.Preferably, the support bar can be designed to be raised so far that the former front edge of the coating sheet can be lifted completely from the surface of the pre-drawing table, with the vertical travel of the support bar being advantageously designed to be larger than the diameter of the cover shaft of the coating sheet.

Gemäß einer anderen bevorzugten Unterstützungsvorrichtung besteht diese aus einer quer zur Ziehrichtung horizontal verlaufenden Blasleiste, die unterhalb des Tischniveaus im Vorziehtisch angeordnet ist und mittels derer nach dem Überfahren der bereits gewendeten früheren Hinterkante des Beschichtungsbogens vor der Umschlagwelle ein Luftstrom unter den Beschichtungsbogen einblasbar und so ein Luftpolster erzeugbar ist, wobei der Luftstrom vorteilhafterweise eine Stärke aufweisen kann, dass mit ihm die ehemalige Vorderkante des Beschichtungsbogens von der Oberfläche des Vorziehtisches vollständig angehoben werden kann, sodass sich auch hier die frühere Vorderkante in der Luft befindlich elastisch flach nach hinten entspannen und ausrichten kann, wobei das Luftpolster entweicht.According to another preferred support device, this consists of a blowing bar running horizontally transverse to the drawing direction, which is arranged below the table level in the drawing table and by means of which an air flow can be blown in under the coating sheet in front of the cover shaft after the already turned earlier rear edge of the coating sheet has been passed, thus creating an air cushion can be generated, in which case the air flow can advantageously be of such a strength that it can be used to completely lift the former front edge of the coating sheet from the surface of the drawing table, so that the former front edge, which is in the air, can also relax and align backwards in an elastic, flat manner, where the air cushion escapes.

Nachfolgend wird das Verfahren anhand von Zeichnungen näher beschrieben. Es zeigen:

Figur 1-4:
eine skizierte Seitenansicht der Wendevorrichtung mit einem mechanischen Unterstützungsbalken in verschiedenen Verfahrensstufen und
Figur 5-8:
eine skizierte Seitenansicht der Wendevorrichtung mit einer Blasleiste in verschiedenen Verfahrensstufen.
The procedure is described in more detail below using drawings. Show it:
Figure 1-4:
a sketched side view of the turning device with a mechanical support beam in different process stages and
Figure 5-8:
a sketched side view of the turning device with a blow bar in different stages of the process.

Die Figuren 1-8 zeigen jeweils einen Vorziehtisch 1 mit einem rechts daneben angeordneten Bogenstapel 9 und einer über dem Vorziehtisch 1 und dem Bogenstapel 9 angeordneten Längsführung 4 für die Ziehleisten 10;11.the Figures 1-8 each show a pull-out table 1 with a stack of sheets 9 arranged next to it on the right and a longitudinal guide 4 for the pull strips 10; 11 arranged above the pull-out table 1 and the stack of sheets 9.

Die Figuren 1 und 5 zeigen jeweils einen bereits schon bis über der Hälfte umgewendeten Beschichtungsbogen 2 mit einer rechtsseitigen Umschlagwelle 6 und die Figuren 2 und 6 einen weiterbewegten Beschichtungsbogen 2 mit einem nur noch knapp auf der vorherigen Vorderseite aufliegenden Beschichtungsbogen 2 kurz vor einem vollständigen umschlagen seines Endes.the figures 1 and 5 each show a coating sheet 2 that has already been turned over halfway, with a right-hand turning shaft 6, and figures 2 and 6 a moving one Coating sheet 2 with a coating sheet 2 just barely resting on the previous front side shortly before its end is completely folded over.

In den Figuren 1-4 ist ein Unterstützungsbalken 7 als Unterstützungsvorrichtung 5 dargestellt, welche in den Figuren 1, 2 und 4 in einer Grundposition in Höhe des Tischniveaus des Vorziehtisches 1 angeordnet ist und in Figur 3 in einer dagegen angehobenen Position gezeigt ist, in der er unter den Beschichtungsbogen 2 greift und diesen so anhebt, dass auch die Hinterkante des Beschichtungsbogens 2 angehoben wird und sich frei nach hinten entspannen und ausrichten kann.In the Figures 1-4 is a support beam 7 shown as a support device 5, which in the Figures 1, 2 and 4 is arranged in a basic position at the height of the table level of the pull-out table 1 and in figure 3 is shown in a raised position, in which it reaches under the coating sheet 2 and lifts it in such a way that the trailing edge of the coating sheet 2 is also lifted and can relax and align freely to the rear.

In Figur 4 ist dann in der linken Position der gewendete Beschichtungsbogen 2 zu sehen und auf der rechten Seite des Vorziehtisches 1 der von dem Bogenstapel 9 vorgezogene neue Beschichtungsbogen 2, der ggf. ungewendet von der linken Ziehleiste 11 auf die linke Seite des Vorziehtisches 1 gezogen wird.In figure 4 then the turned coating sheet 2 can be seen in the left position and on the right side of the pre-draft table 1 the new coating sheet 2 pulled forward from the sheet stack 9, which may be pulled unturned by the left drawing bar 11 to the left side of the pre-drawing table 1.

Die Figur 7 zeigt analog zur Figur 3 eine in Betrieb befindliche Blasleiste 8, die unterhalb des Beschichtungsbogens 2 ein Luftpolster erzeugt, welches den Beschichtungsbogen 2 trägt und so die Hinterkante soweit entlastet, das auch hier die Kante von der Oberfläche des Vorziehtisches 1 abhebt, sodass sich diese elastisch flach nach hinten entspannen und ausrichten kann, wobei das Luftpolster entweicht.the figure 7 shows analogous to figure 3 an operating blow bar 8, which creates an air cushion underneath the coating sheet 2, which carries the coating sheet 2 and thus relieves the rear edge to such an extent that the edge is also lifted from the surface of the drawing table 1 here, so that it relaxes elastically flat to the rear and can align, with the air cushion escaping.

Claims (10)

  1. Apparatus for turning over a coating sheet (2) deposited on a draw-forward table (1), the apparatus comprising a contact device for contacting the rear edge of the coating sheet (2), which is mounted in the upward direction and in the drawing direction (3) on a longitudinal guide (4) above the draw-forward table (1), characterized in that the contact device is mounted such as to be rotatable about a horizontal transverse axis that is movable transversely to the drawing direction (3), and in that a support device (5) is arranged in or below the table plane of the draw-forward table (1), which support device mechanically or pneumatically supports a not yet fully turned-over coating sheet (2) from below, in the rear run-out region, in front of the turnover wave (6) thereof that also moves in the drawing direction (3).
  2. Apparatus according to claim 1, characterized in that the support device (5) consists of a support beam (7) extending horizontally transversely to the drawing direction (3), the support beam being designed such that it can be raised vertically out of the table plane once the already turned-over, former rear edge of the coating sheet (2) has travelled across it.
  3. Apparatus according to claim 2, characterized in that the support beam (7) is designed such that it can be raised upward to such an extent that the former front edge of the coating sheet (2) is raised off the surface of the draw-forward table (1).
  4. Apparatus according to claim 3, characterized in that the vertical displacement travel of the support beam (7) is larger than the diameter of the turnover wave (6) of the coating sheet (2).
  5. Apparatus according to claim 1, characterized in that the support device (5) consists of a blowing bar (8) extending horizontally transversely to the drawing direction (3), by means of which, once the already turned-over, former rear edge of the coating sheet (2) has travelled across it, an air flow can be blown in beneath the coating sheet (2) in front of the turnover wave (5), and an air cushion can be generated.
  6. Apparatus according to claim 5, characterized in that the air flow has such a strength that the former front edge of the coating sheet (2) can thereby be raised off the surface of the draw-forward table (1).
  7. Method for turning over a coating sheet (2) deposited on a draw-forward table (1), the rear edge of the coating sheet (2) being contacted by a contact device and being moved by the latter in an upward direction and in a drawing direction (3) along a longitudinal guide (4) above the draw-forward table (1), characterized in that the contact device is rotated about a horizontal transverse axis that is rotatable transversely to the drawing direction (3), and the not yet fully turned-over coating sheet (2) is mechanically or pneumatically supported, in front of a resulting turnover wave (6) that also moves in the drawing direction (3), by a support device (5) arranged in or below the table plane of the draw-forward table (1).
  8. Method according to claim 7, characterized in that, once the already turned-over, former rear edge of the coating sheet (2) has travelled across it, the part that has not yet been turned over is raised by a support beam (7) extending horizontally transversely to the drawing direction, and the former front edge is relieved of weight before being turned over, said former front edge elastically orienting itself in the air in a flat manner at the rear and unbending as the coating sheet (2) moves further in the drawing direction (3).
  9. Method according to claim 7, characterized in that, once the already turned-over, former rear edge of the coating sheet (2) has travelled across it, the part that has not yet been turned over is raised by means of an air flow from a blowing bar (8) extending horizontally transversely to the drawing direction (3), thereby forming an air cushion, and the former front edge is relieved of weight before being turned over, said former front edge elastically orienting itself in the air in a flat manner at the rear and unbending as the coating sheet (2) moves further in the drawing direction (3).
  10. Method according to any one of the preceding claims 7 to 9, characterized in that the rear edge of the coating sheet (2) is raised and turned over toward the front by an additional turn-forward bar arranged below the table plane of the draw-forward table (1), and the further draw-forward movement is effected by a further drawing bar that takes the raised and turned-over rear edge of the attachment sheet (2) in the air from the turn-forward bar.
EP20184268.9A 2019-07-06 2020-07-06 Device and method for turning over coating sheets Active EP3763648B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019118331 2019-07-06
DE102019128975.0A DE102019128975A1 (en) 2019-07-06 2019-10-28 Device and method for turning coating sheets

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EP3763648A1 EP3763648A1 (en) 2021-01-13
EP3763648B1 true EP3763648B1 (en) 2022-01-26

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EP20184268.9A Active EP3763648B1 (en) 2019-07-06 2020-07-06 Device and method for turning over coating sheets

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EP (1) EP3763648B1 (en)
ES (1) ES2907219T3 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04345450A (en) * 1991-05-24 1992-12-01 Mitsubishi Heavy Ind Ltd Paper feeding device of sheet printer
JP3557042B2 (en) * 1996-04-19 2004-08-25 ペガサスミシン製造株式会社 Dough piece transfer device
DE102014117485B4 (en) 2014-11-28 2017-03-23 Wemhöner Surface Technologies GmbH & Co. KG Apparatus and method for separating and turning single sheets stored on a stack of sheets
ITUB20152339A1 (en) * 2015-07-21 2017-01-21 Giuseppe Gallucci EQUIPMENT FOR THE TILTING OF SHEETS AND / OR PANELS

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ES2907219T3 (en) 2022-04-22
EP3763648A1 (en) 2021-01-13

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