EP1700669B1 - Lifting table - Google Patents

Lifting table Download PDF

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Publication number
EP1700669B1
EP1700669B1 EP06000456A EP06000456A EP1700669B1 EP 1700669 B1 EP1700669 B1 EP 1700669B1 EP 06000456 A EP06000456 A EP 06000456A EP 06000456 A EP06000456 A EP 06000456A EP 1700669 B1 EP1700669 B1 EP 1700669B1
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EP
European Patent Office
Prior art keywords
table according
lift table
tool
pressure
chamber
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.)
Not-in-force
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EP06000456A
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German (de)
French (fr)
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EP1700669A1 (en
Inventor
Ulrich Laupheimer
Kurt Lämmle
Georg Pfau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Uhlmann Pac Systeme GmbH and Co KG
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Uhlmann Pac Systeme GmbH and Co KG
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Publication of EP1700669A1 publication Critical patent/EP1700669A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/35—Inflatable flexible elements, e.g. bellows

Definitions

  • the invention relates to a lifting table, in particular for a workstation of a packaging machine, with a tool-carrying tool plate, which is mounted vertically adjustable by means of a lifting device for opening and closing the tool, see for example EP-A-0 903 291 ,
  • Such lifting tables are known in practice, in which by means of the lifting device, the tool plate is adjusted in height to act through the tool on a workpiece, usually taking advantage of a counter-plate.
  • the lifting device not only causes the height adjustment of the tool plate with the workpiece, but also generates the required force.
  • the quality of workpiece machining suffers, if not precise Orientation of the workpiece or the counter-plate is present to the tool plate and thus the force acting on the workpiece force is dependent on the position and extent of the workpiece, so that there may be the case that different areas of the workpiece are subjected to different forces.
  • the invention is therefore the object of a lifting table of the type mentioned in such a way that regardless of the extent of the workpiece a uniform and large power transmission is possible.
  • This object is achieved in a lifting table of the type mentioned above in that between the tool plate and the lifting device a fluid receiving, limited by a membrane chamber is formed, which is connected via a pressure medium line with a pressure medium reservoir.
  • Such a design of a lifting table has the advantage that the working stroke can be carried out unchanged via the lifting device, but a uniform force transmission is ensured via the fluid-filled chamber delimited by the diaphragm, since the flexible, deformable diaphragm effects a compensation stroke.
  • the force applied to the workpiece can also be varied. There is a large-scale introduction of this force and thus a uniform force distribution over the entire effective area, wherein the force to be transmitted is maintained over the entire life of the membrane and no recalibration is required. A wear is detected immediately due to a leak.
  • the lifting device has a force introduction plate, and if between the tool plate and secured by retaining strips on the tool plate force introduction plate, the chamber is arranged. It is advantageous in particular that the force introduction plate and the tool plate can mediate through the membrane relative to each other can adjust and it is thus easier for the membrane to perform the desired balance stroke.
  • the fluid is formed by a gas, preferably air.
  • a gas preferably air.
  • a gas has the advantage that no pollution or wetting of the environment takes place even in the event of leakage and the pressure medium reservoir itself can be kept small when a compressor for compressing the ambient air is available.
  • the membrane comprises the chamber on all sides and realized as an air cushion, which accounts for sealing problems of the membrane with respect to interfaces of the tool plate or the force introduction plate by this embodiment. It is also advantageous that then there is the possibility that the air cushion is exchangeably connected to the pressure line.
  • the air cushion or the membrane 7 is provided several times, each with at least one compressed air connection.
  • the multiple use of the air cushion or the membrane allows a better distribution of force, which is also given when the shape of the air cushion, for example, is adapted to the force pattern to be transmitted to the tool.
  • the shape of the air cushion or the membrane is largely arbitrary and in addition to the basic geometric shapes such as circle, ring, Rectangle or the like may also have a complex shaped circumference.
  • An enlargement of the area in which compensation can take place is achieved by arranging a plurality of airbags or membranes one above the other and / or next to one another.
  • a further preferred embodiment of the invention is characterized in that a sensor, which is connected via a data line to an evaluation unit, monitors the pressure of the fluid enclosed in the chamber.
  • the sensor offers the possibility to control the force acting on the workpiece and to detect possible wear at an early stage.
  • a maximum air pressure and a minimum air pressure can be predetermined via the evaluation unit so that measured values detected by the sensor are recognized as being correct within the interval defined thereby and deviations make it possible to intervene in the process sequence.
  • the pressure line and / or the compressed air connection is associated with a pressure reducer, since not only is it possible to vary the height of the pressure in the chamber, but also to generate different pressures when using a plurality of air cushions ,
  • the low pressure determines the force exerted on the tool and determines which air cushion performs the compensation stroke.
  • the higher pressure in the other air cushion is used to positively influence the deformation behavior and thus the force distribution between the tool and the workpiece or the counter-plate. It should be noted that it is the user's choice to apply one or the other air cushion with the increased pressure.
  • a proportional valve is arranged to allow an automated variation of the air pressure.
  • a lifting table 1 is shown, in which the relevant parts for explaining the invention are shown highlighted.
  • the lifting table 1 as it finds particular application in a trained as a sealing or forming station or the like workstation a packaging machine, has a tool 2 carrying a tool plate 3, which is mounted vertically adjustable by means of a lifting device 4 for opening and closing the tool 2.
  • the lifting device 4 can be made almost arbitrary for the realization of the invention and cause, for example, a motorized adjustment of the tool plate 3 or pressure medium actuated adjusting a punch in a cylinder chamber.
  • the lifting device 4 a force introduction plate 5, which is adjusted primarily in height.
  • a fluid namely formed by air gas
  • receiving limited by a membrane 7 chamber 8
  • a pressure medium line 9 with a pressure medium reservoir
  • the membrane 7, the chamber 8 on all sides comprises and realized as an air cushion 10, which between the tool plate 3 and through Holding strips 11 secured to the tool plate 3 secured force introduction plate 5 is arranged.
  • a receptacle 13 is formed, in which the force introduction plate 5 engages with play.
  • the air cushion 10 is exchangeably connected to the pressure line 9, which has a pressure reducer 12 in order to vary the pressure prevailing in the air cushion 10 pressure. Shown is still a proportional valve 15th
  • the air cushion 10 is provided several times, each with a compressed air connection, so that there is the possibility to apply each air cushion 10 with a different pressure.
  • the stroke of the lift table 1 is generated by the lifting device 4, while the air cushion 10 serve to carry out a compensation stroke and thus to ensure a proper application of force to be machined by the tool 2 workpiece.
  • An increase in the achievable compensation stroke is achieved by arranging a plurality of air cushions 10 in different sizes and / or different pressures one above the other and / or next to each other.
  • a pressure sensor 14 monitors the fluid enclosed in the membrane 7.
  • the pressure sensor 14 is connected via a data line with an evaluation unit, so as to control the prevailing in the chamber 8 the pressure to be able to control and log the proper way of working.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Magnetic Heads (AREA)
  • Inorganic Insulating Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Press Drives And Press Lines (AREA)
  • Package Closures (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The lifting table has a tool plate (3) carrying the tool (2), the height of which can be adjusted by a lifting device (4) to open and close the tool. There is a chamber (8) bounded by membrane (7) between the tool plate and the lifting device to receive fluid. This chamber is connected to a reservoir by means of a fluid line (9).

Description

Die Erfindung betrifft einen Hubtisch insbesondere für eine Arbeitsstation einer Verpackungsmaschine, mit einer ein Werkzeug tragenden Werkzeugplatte, die mittels einer Hubvorrichtung zum Öffnen und Schließen des Werkzeugs höhenverstellbar gelagert ist, siehe z.B EP-A-0 903 291 .The invention relates to a lifting table, in particular for a workstation of a packaging machine, with a tool-carrying tool plate, which is mounted vertically adjustable by means of a lifting device for opening and closing the tool, see for example EP-A-0 903 291 ,

Derartige Hubtische sind aus der Praxis bekannt, bei denen mittels der Hubvorrichtung die Werkzeugplatte in der Höhe verstellt wird, um durch das Werkzeug auf ein Werkstück, in der Regel unter Ausnutzung einer Gegenplatte, einzuwirken. Mit der Hubvorrichtung wird dabei nicht nur die Höhenverstellung der Werkzeugplatte mit dem Werkstück bewirkt, sondern auch die erforderliche Kraft erzeugt. Allerdings leidet bei bestimmten Anwendungsfällen die Qualität der Werkstückbearbeitung, wenn keine präzise Ausrichtung des Werkstücks oder der Gegenplatte zu der Werkzeugplatte vorliegt und damit die auf das Werkstück einwirkende Kraft abhängig ist von der Lage und Ausdehnung des Werkstückes, so dass der Fall gegeben sein kann, dass unterschiedliche Bereiche des Werkstückes mit unterschiedlichen Kräften beaufschlagt werden.Such lifting tables are known in practice, in which by means of the lifting device, the tool plate is adjusted in height to act through the tool on a workpiece, usually taking advantage of a counter-plate. The lifting device not only causes the height adjustment of the tool plate with the workpiece, but also generates the required force. However, in certain applications, the quality of workpiece machining suffers, if not precise Orientation of the workpiece or the counter-plate is present to the tool plate and thus the force acting on the workpiece force is dependent on the position and extent of the workpiece, so that there may be the case that different areas of the workpiece are subjected to different forces.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Hubtisch der eingangs genannten Art so auszubilden, dass unabhängig von der Ausdehnung des Werkstückes eine gleichmäßige und große Kraftübertragung ermöglicht ist.The invention is therefore the object of a lifting table of the type mentioned in such a way that regardless of the extent of the workpiece a uniform and large power transmission is possible.

Diese Aufgabe wird bei einem Hubtisch der eingangs genannten Art dadurch gelöst, dass zwischen der Werkzeugplatte und der Hubvorrichtung eine ein Fluid aufnehmende, durch eine Membran begrenzte Kammer ausgebildet ist, die über eine Druckmittelleitung mit einem Druckmittelreservoir verbunden ist.This object is achieved in a lifting table of the type mentioned above in that between the tool plate and the lifting device a fluid receiving, limited by a membrane chamber is formed, which is connected via a pressure medium line with a pressure medium reservoir.

Mit einer derartigen Gestaltung eines Hubtisches ist der Vorteil verbunden, dass unverändert über die Hubvorrichtung der Arbeitshub ausgeführt werden kann, dass aber über die durch die Membran begrenzte, fluidgefüllte Kammer eine gleichmäßige Kraftübertragung sichergestellt ist, da die flexible, deformierbare Membran einen Ausgleichshub bewirkt. Darüber hinaus kann durch eine Variation des Druckes in der Kammer auch die Kraft variiert werden, mit der das Werkstück beaufschlagt wird. Es liegt eine großflächige Einleitung dieser Kraft und damit eine gleichmäßige Kraftverteilung über die gesamte Wirkfläche vor, wobei die zu übertragene Kraft über die komplette Lebensdauer der Membran erhalten bleibt und keine Nachkalibrierung erforderlich ist. Ein Verschleiß wird sofort aufgrund einer Undichtigkeit erkannt.Such a design of a lifting table has the advantage that the working stroke can be carried out unchanged via the lifting device, but a uniform force transmission is ensured via the fluid-filled chamber delimited by the diaphragm, since the flexible, deformable diaphragm effects a compensation stroke. In addition, by varying the pressure in the chamber, the force applied to the workpiece can also be varied. There is a large-scale introduction of this force and thus a uniform force distribution over the entire effective area, wherein the force to be transmitted is maintained over the entire life of the membrane and no recalibration is required. A wear is detected immediately due to a leak.

Als vorteilhaft hat es sich erwiesen, wenn die Hubvorrichtung eine Krafteinleitungsplatte aufweist, und wenn zwischen der Werkzeugplatte und der durch Halteleisten an der Werkzeugplatte gesicherten Krafteinleitungsplatte die Kammer angeordnet ist. Vorteilhaft ist dabei insbesondere, dass die Krafteinleitungsplatte und die Werkzeugplatte sich vermittelt durch die Membran relativ zueinander verstellen können und es damit der Membran erleichtert ist, den erwünschten Ausgleichshub durchzuführen.It has proven to be advantageous if the lifting device has a force introduction plate, and if between the tool plate and secured by retaining strips on the tool plate force introduction plate, the chamber is arranged. It is advantageous in particular that the force introduction plate and the tool plate can mediate through the membrane relative to each other can adjust and it is thus easier for the membrane to perform the desired balance stroke.

Im Rahmen der Erfindung ganz besonders bevorzugt ist es, wenn das Fluid durch ein Gas, vorzugsweise Luft gebildet ist. Mit der Verwendung eines Gases ist der Vorteil verbunden, dass keine Verschmutzung oder Benetzung der Umgebung selbst im Falle einer Leckage erfolgt und das Druckmittelreservoir selber klein gehalten sein kann, wenn ein Kompressor zur Verdichtung der Umgebungsluft zur Verfügung steht.In the context of the invention, it is very particularly preferred if the fluid is formed by a gas, preferably air. With the use of a gas has the advantage that no pollution or wetting of the environment takes place even in the event of leakage and the pressure medium reservoir itself can be kept small when a compressor for compressing the ambient air is available.

Im Rahmen der Erfindung weiterhin vorgesehen ist es, dass die Membran die Kammer allseitig umfasst und als ein Luftkissen realisiert, wobei durch diese Ausführungsform Abdichtungsprobleme der Membran gegenüber Grenzflächen der Werkzeugplatte oder der Krafteinleitungsplatte entfallen. Vorteilhaft ist auch, dass sich dann die Möglichkeit ergibt, dass das Luftkissen austauschbar an der Druckleitung angeschlossen ist.In the context of the invention, it is further provided that the membrane comprises the chamber on all sides and realized as an air cushion, which accounts for sealing problems of the membrane with respect to interfaces of the tool plate or the force introduction plate by this embodiment. It is also advantageous that then there is the possibility that the air cushion is exchangeably connected to the pressure line.

Wenn in der Werkzeugplatte eine Aufnahme ausgebildet ist, in die die Krafteinleitungsplatte beweglich eingreift, dann ist bei einer guten Führung unverändert die Möglichkeit gegeben, einen Ausgleich zu realisieren, also eine Neuausrichtung der Werkzeugplatte relativ zu der Krafteinleitungsplatte zu erlauben.If a receptacle is formed in the tool plate, into which the force introduction plate movably engages, then, given a good guidance, there is still the possibility of realizing a compensation, that is to allow reorientation of the tool plate relative to the force introduction plate.

Bevorzugt ist es weiterhin, dass das Luftkissen oder die Membran 7 mehrfach vorgesehen ist mit jeweils mindestens einem Druckluftanschluss. Die mehrfache Verwendung des Luftkissens oder der Membran ermöglicht eine bessere Kraftverteilung, die auch gegeben ist, wenn die Form zum Beispiel des Luftkissens dem auf das Werkzeug zu übertragenen Kraftbild angepasst ist. Mit austauschbaren Luftkissen besteht die Möglichkeit, Einfluss auf das am Werkstück anstehende Kraftbild zu nehmen, beispielsweise bei unterschiedlichen Anwendungsfällen Luftkissen unterschiedlicher Größe oder unterschiedlicher Form einzusetzen, wobei die Form des Luftkissens beziehungsweise der Membran weitgehend beliebig ist und neben den geometrischen Grundformen wie Kreis, Ring, Rechteck oder ähnliches auch einen Komplex geformten Umfang aufweisen kann.It is also preferred that the air cushion or the membrane 7 is provided several times, each with at least one compressed air connection. The multiple use of the air cushion or the membrane allows a better distribution of force, which is also given when the shape of the air cushion, for example, is adapted to the force pattern to be transmitted to the tool. With exchangeable air cushion, it is possible to influence the force applied to the workpiece force pattern, for example, to use in different applications air cushion of different sizes or different shape, the shape of the air cushion or the membrane is largely arbitrary and in addition to the basic geometric shapes such as circle, ring, Rectangle or the like may also have a complex shaped circumference.

Eine Vergrößerung des Bereiches, in dem ein Ausgleich stattfinden kann, wird erreicht, indem eine Mehrzahl von Luftkissen beziehungsweise Membran übereinander und/oder nebeneinander angeordnet ist.An enlargement of the area in which compensation can take place is achieved by arranging a plurality of airbags or membranes one above the other and / or next to one another.

Eine weiterhin bevorzugte Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass ein Sensor, der über eine Datenleitung mit einer Auswerteeinheit verbunden ist, den Druck des in der Kammer eingeschlossenen Fluids überwacht.A further preferred embodiment of the invention is characterized in that a sensor, which is connected via a data line to an evaluation unit, monitors the pressure of the fluid enclosed in the chamber.

Durch den Sensor besteht die Möglichkeit, die auf das Werkstück einwirkende Kraft zu kontrollieren und einen möglichen Verschleiß frühzeitig zu erkennen. Über die Auswerteeinheit kann beispielsweise ein maximaler Luftdruck und ein minimaler Luftdruck vorgegeben werden, so dass durch den Sensor erfasste Messwerte innerhalb des dadurch definierten Intervalls als ordnungsgemäß erkannt werden und Abweichungen einen Eingriff in den Prozessablauf ermöglichen.The sensor offers the possibility to control the force acting on the workpiece and to detect possible wear at an early stage. For example, a maximum air pressure and a minimum air pressure can be predetermined via the evaluation unit so that measured values detected by the sensor are recognized as being correct within the interval defined thereby and deviations make it possible to intervene in the process sequence.

Vorteilhaft ist es weiterhin, wenn der Druckleitung und/oder dem Druckluftanschluss ein Druckminderer zugeordnet ist, da so nicht nur die Möglichkeit besteht, die Höhe des Druckes in der Kammer zu variieren, sondern auch bei Verwendung einer Mehrzahl von Luftkissen in diesen unterschiedliche Drücke zu erzeugen. Der niedrige Druck bestimmt dabei die auf das Werkzeug ausgeübte Kraft und legt fest, welches Luftkissen den Ausgleichshub ausführt. Der höhere Druck in dem anderen Luftkissen dient dazu, das Verformungsverhalten und damit die Kraftverteilung zwischen dem Werkzeug und dem Werkstück bzw. der Gegenplatte positiv zu beeinflussen. Zu beachten ist dabei, dass es in der Wahl des Nutzers liegt, dass eine oder das andere Luftkissen mit dem erhöhten Druck zu beaufschlagen.It is furthermore advantageous if the pressure line and / or the compressed air connection is associated with a pressure reducer, since not only is it possible to vary the height of the pressure in the chamber, but also to generate different pressures when using a plurality of air cushions , The low pressure determines the force exerted on the tool and determines which air cushion performs the compensation stroke. The higher pressure in the other air cushion is used to positively influence the deformation behavior and thus the force distribution between the tool and the workpiece or the counter-plate. It should be noted that it is the user's choice to apply one or the other air cushion with the increased pressure.

Vorgesehen ist auch, dass in der Druckleitung ein Proportionalventil angeordnet ist, um eine automatisierte Variation des Luftdruckes zu ermöglichen.It is also provided that in the pressure line, a proportional valve is arranged to allow an automated variation of the air pressure.

Im folgenden wird die Erfindung an in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert; es zeigen:

Fig. 1
einen Längsschnitt durch einen erfindungsgemäßen Hubtisch mit einem zwischen der Werkzeugplatte und der Krafteinleitungsplatte angeordneten Luftkissen, und
Fig. 2
eine der Figur 1 entsprechende Darstellung einer Ausführungsform mit zwei Luftkissen.
In the following the invention is explained in detail in exemplary embodiments illustrated in the drawing; show it:
Fig. 1
a longitudinal section through a lifting table according to the invention with an arranged between the tool plate and the force introduction plate air cushion, and
Fig. 2
1 corresponding representation of an embodiment with two airbags.

In der Figur 1 ist ein Hubtisch 1 gezeigt, bei dem die zur Erläuterung der Erfindung maßgeblichen Teile hervorgehoben dargestellt sind. Der Hubtisch 1, wie er insbesondere in einer als Siegel- oder Formstation oder dergleichen ausgebildeten Arbeitsstation einer Verpackungsmaschine Anwendung findet, weist eine ein Werkzeug 2 tragende Werkzeugplatte 3 auf, die mittels einer Hubvorrichtung 4 zum Öffnen und Schließen des Werkzeugs 2 höhenverstellbar gelagert ist. Die Hubvorrichtung 4 kann für die Realisierung der Erfindung dabei nahezu beliebig gestaltet sein und beispielsweise eine motorische Verstellung der Werkzeugplatte 3 bewirken oder druckmittelbetätigt einen Stempel in einer Zylinderkammer verstellen. Bei dem in der Zeichnung dargestellten Ausführungsbeispiel weist die Hubvorrichtung 4 eine Krafteinleitungsplatte 5 auf, die primär in der Höhe verstellt wird. Zwischen der Werkzeugplatte 3 und der Hubvorrichtung 4, nämlich der Krafteinleitungplatte 5 ist eine ein Fluid, nämlich ein durch Luft gebildetes Gas, aufnehmende, durch eine Membran 7 begrenzte Kammer 8 ausgebildet, die über eine Druckmittelleitung 9 mit einem Druckmittelreservoir verbunden ist; in der Zeichnung dargestellt ist eine Ausführungsform, bei der die Membran 7 die Kammer 8 allseitig umfasst und als ein Luftkissen 10 realisiert, das zwischen der Werkzeugplatte 3 und der durch Halteleisten 11 an der Werkzeugplatte 3 gesicherten Krafteinleitungsplatte 5 angeordnet ist. In der Werkzeugplatte 3 ist eine Aufnahme 13 ausgebildet, in die die Krafteinleitungsplatte 5 mit Spiel eingreift.In the figure 1, a lifting table 1 is shown, in which the relevant parts for explaining the invention are shown highlighted. The lifting table 1, as it finds particular application in a trained as a sealing or forming station or the like workstation a packaging machine, has a tool 2 carrying a tool plate 3, which is mounted vertically adjustable by means of a lifting device 4 for opening and closing the tool 2. The lifting device 4 can be made almost arbitrary for the realization of the invention and cause, for example, a motorized adjustment of the tool plate 3 or pressure medium actuated adjusting a punch in a cylinder chamber. In the embodiment shown in the drawing, the lifting device 4, a force introduction plate 5, which is adjusted primarily in height. Between the tool plate 3 and the lifting device 4, namely the force introduction plate 5 is a fluid, namely formed by air gas, receiving, limited by a membrane 7 chamber 8 is formed, which is connected via a pressure medium line 9 with a pressure medium reservoir; shown in the drawing is an embodiment in which the membrane 7, the chamber 8 on all sides comprises and realized as an air cushion 10, which between the tool plate 3 and through Holding strips 11 secured to the tool plate 3 secured force introduction plate 5 is arranged. In the tool plate 3, a receptacle 13 is formed, in which the force introduction plate 5 engages with play.

Das Luftkissen 10 ist austauschbar an der Druckleitung 9 angeschlossen, die über einen Druckminderer 12 verfügt, um den in dem Luftkissen 10 herrschenden Druck variieren zu können. Gezeigt ist weiterhin ein Proportionalventil 15.The air cushion 10 is exchangeably connected to the pressure line 9, which has a pressure reducer 12 in order to vary the pressure prevailing in the air cushion 10 pressure. Shown is still a proportional valve 15th

Die Figur 2 zeigt eine Ausführungsform, bei der das Luftkissen 10 mehrfach vorgesehen ist mit jeweils einem Druckluftanschluss, so dass die Möglichkeit besteht, jedes Luftkissen 10 mit einem anderen Druck zu beaufschlagen. Dadurch besteht für den Nutzer die Möglichkeit, für den jeweiligen Anwendungszweck mit dem gewünschten Kraftbild ein geeignetes Luftkissen 10 oder entsprechend eine Mehrzahl von Luftkissen 10 zu verwenden. Dabei ist zu beachten, dass durch die Hubvorrichtung 4 der Arbeitshub des Hubtisches 1 erzeugt wird, während die Luftkissen 10 dazu dienen, einen Ausgleichshub zu vollziehen und so eine ordnungsgemäße Krafteinleitung in das von dem Werkzeug 2 zu bearbeitende Werkstück zu gewährleisten. Eine Vergrößerung des erzielbaren Ausgleichhubes wird erreicht, indem eine Mehrzahl von Luftkissen 10 in unterschiedlichen Größen und/oder unterschiedlichen Drücken übereinander und/oder nebeneinander angeordnet sind.2 shows an embodiment in which the air cushion 10 is provided several times, each with a compressed air connection, so that there is the possibility to apply each air cushion 10 with a different pressure. As a result, it is possible for the user to use a suitable air cushion 10 or correspondingly a plurality of air cushions 10 for the respective application with the desired force pattern. It should be noted that the stroke of the lift table 1 is generated by the lifting device 4, while the air cushion 10 serve to carry out a compensation stroke and thus to ensure a proper application of force to be machined by the tool 2 workpiece. An increase in the achievable compensation stroke is achieved by arranging a plurality of air cushions 10 in different sizes and / or different pressures one above the other and / or next to each other.

Wie weiterhin der Figur 1 zu entnehmen ist, überwacht ein Drucksensor 14 das in der Membran 7 eingeschlossene Fluid. Der Drucksensor 14 ist über eine Datenleitung mit einer Auswerteeinheit verbunden ist, um so über eine Kontrolle des in der Kammer 8 herrschenden Druckes die ordnungsgemäße Arbeitsweise kontrollieren und protokollieren zu können.As can further be seen from FIG. 1, a pressure sensor 14 monitors the fluid enclosed in the membrane 7. The pressure sensor 14 is connected via a data line with an evaluation unit, so as to control the prevailing in the chamber 8 the pressure to be able to control and log the proper way of working.

Claims (12)

  1. A lift table, in particular for a working station of a packaging machine, comprising a tool plate (3) which carries a tool (2) and which is mounted displaceably in respect of height by means of a lift device (4) for opening and closing the tool (2), characterised in that provided between the tool plate (3) and the lift device (4) is a chamber (8) which accommodates a fluid and which is delimited by a diaphragm (7) and which is connected to a pressure fluid reservoir by way of a pressure fluid line (9).
  2. A lift table according to claim 1 characterised in that the lift device (4) has a force-application plate (5) and that the chamber (8) is disposed between the tool plate (3) and the force-application plate (5) which is secured to the tool plate (3) by holding bars (11).
  3. A lift table according to claim 1 or claim 2 characterised in that the fluid is formed by a gas, preferably air.
  4. A lift table according to one of claims 1 to 3 characterised in that the diaphragm (7) surrounds the chamber (8) on all sides and is in the form of an air cushion (10).
  5. A lift table according to claim 4 characterised in that the air cushion (10) or the diaphragm (7) of the air chamber is interchangeably connected to the pressure line (9).
  6. A lift table according to one of claims 1 to 5 characterised in that provided in the tool plate (3) is a receiving means (13) into which the force-application plate (5) movably engages.
  7. A lift table according to one of claims 4 to 6 characterised in that there is provided a plurality of air cushions (10) or diaphragms (7), each with at least one respective compressed air connection.
  8. A lift table according to one of claims 4 to 7 characterised in that the shape of the air cushion (10) or the diaphragm (7) is adapted to the force pattern to be transmitted to the tool (2).
  9. A lift table according to one of claims 4 to 8 characterised in that a plurality of air cushions (10) are arranged in mutually superposed and/or mutually juxtaposed relationship.
  10. A lift table according to one of claims 1 to 9 characterised in that a sensor (14) which is connected to an evaluation unit by way of a data line monitors the pressure of the fluid enclosed in the chamber (8).
  11. A lift table according to one of claims 1 to 10 characterised in that the pressure of the fluid enclosed in the chamber can be regulated by a pressure-reducing means (12).
  12. A lift table according to one of claims 1 to 11 characterised in that the pressure of the fluid enclosed in the chamber can be regulated by a proportional valve (15).
EP06000456A 2005-03-12 2006-01-11 Lifting table Not-in-force EP1700669B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005011434A DE102005011434B3 (en) 2005-03-12 2005-03-12 Lifting table for work station of packing machine has chamber bounded by membrane between tool plate and lifting device to receive fluid

Publications (2)

Publication Number Publication Date
EP1700669A1 EP1700669A1 (en) 2006-09-13
EP1700669B1 true EP1700669B1 (en) 2007-07-25

Family

ID=36120863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06000456A Not-in-force EP1700669B1 (en) 2005-03-12 2006-01-11 Lifting table

Country Status (5)

Country Link
US (1) US20060201226A1 (en)
EP (1) EP1700669B1 (en)
JP (1) JP2006264787A (en)
AT (1) ATE367887T1 (en)
DE (2) DE102005011434B3 (en)

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Publication number Priority date Publication date Assignee Title
CN101443183A (en) * 2006-05-09 2009-05-27 株式会社阿敏诺 Underdrive-type press
DE102006051929B4 (en) * 2006-11-03 2023-09-21 Syntegon Technology Gmbh thermoforming machine
DE102008020234A1 (en) * 2008-04-22 2009-10-29 Ulma Packaging Technological Center, S. Coop Clamping device for a tool
GB2471712A (en) * 2009-07-10 2011-01-12 De Beers Centenary AG Gemstone alignment system
US9387529B2 (en) * 2013-03-15 2016-07-12 Honda Motor Co., Ltd. Forming press
DE102014100351B4 (en) 2014-01-14 2022-10-06 Johannes Herrmann e. K. Air-bearing support element, in particular for motor vehicles
KR102252762B1 (en) * 2020-03-03 2021-05-14 유래만 Packing For Pressure Head Of Hot-Press

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DE7305441U (en) * 1973-09-27 Bosch R Gmbh Device for opening and closing processing stations
US3174722A (en) * 1962-09-17 1965-03-23 Erhard J Alm Load lifting device
DE7615974U1 (en) * 1976-05-19 1976-09-23 Karl Schwarze & Sohn Kg, 4950 Minden LIFTING DEVICE
DE2843894C3 (en) * 1978-10-07 1985-11-14 Multivac Sepp Haggenmüller KG, 8941 Wolfertschwenden Vacuum station
DE3322007A1 (en) * 1983-06-18 1984-12-20 Bosch Gmbh Robert Self-compensating bearing for machine shafts
DE3941183A1 (en) * 1989-12-13 1991-06-20 Multivac Haggenmueller Kg PACKING MACHINE FOR PRODUCING A RECOVERABLE PACKAGING WITH A PRODUCT
DE4235569A1 (en) * 1992-10-22 1994-04-28 Schaeffler Waelzlager Kg Linear guide for guide of machine tool - has squeeze hydraulic film between surfaces as oscillation damper
US5578159A (en) * 1993-06-29 1996-11-26 Hitachi Techno Engineering Co., Ltd. Hot press for producing multilayer circuit board
DE19740988A1 (en) * 1997-09-18 1999-03-25 Lieder Maschinenbau Gmbh & Co Device and method for sealing packaging containers
JP3098003B2 (en) * 1998-09-24 2000-10-10 日清紡績株式会社 Laminating equipment for solar cells
JP2003511629A (en) * 1999-10-12 2003-03-25 シーメンス オートモーティヴ インコーポレイテッド How to make the air flow valve flat
US6701695B1 (en) * 2002-04-18 2004-03-09 Brian Douglas Packaging machine for producing reclosable packages
JP4213610B2 (en) * 2004-03-15 2009-01-21 富士通株式会社 Bonded board manufacturing equipment
DE102005006783B4 (en) * 2005-02-14 2006-10-12 Uhlmann Pac-Systeme Gmbh & Co Kg workstation

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Also Published As

Publication number Publication date
ATE367887T1 (en) 2007-08-15
JP2006264787A (en) 2006-10-05
DE502006000037D1 (en) 2007-09-06
US20060201226A1 (en) 2006-09-14
DE102005011434B3 (en) 2006-04-20
EP1700669A1 (en) 2006-09-13

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