EP1560753A1 - Tensioning piece of a conveyor chain for a film web - Google Patents

Tensioning piece of a conveyor chain for a film web

Info

Publication number
EP1560753A1
EP1560753A1 EP03788987A EP03788987A EP1560753A1 EP 1560753 A1 EP1560753 A1 EP 1560753A1 EP 03788987 A EP03788987 A EP 03788987A EP 03788987 A EP03788987 A EP 03788987A EP 1560753 A1 EP1560753 A1 EP 1560753A1
Authority
EP
European Patent Office
Prior art keywords
clamping piece
piece
clamping
foot
bearing bracket
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
EP03788987A
Other languages
German (de)
French (fr)
Other versions
EP1560753B1 (en
Inventor
Jürgen NIESAR
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.)
GEA CFS Germany GmbH
Original Assignee
CFS Germany GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CFS Germany GmbH filed Critical CFS Germany GmbH
Publication of EP1560753A1 publication Critical patent/EP1560753A1/en
Application granted granted Critical
Publication of EP1560753B1 publication Critical patent/EP1560753B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B65H20/00—Advancing webs
    • B65H20/16—Advancing webs by web-gripping means, e.g. grippers, clips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • B65B41/14—Feeding webs from rolls by grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/30—Chains
    • B65H2404/31—Chains with auxiliary handling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/50—Gripping means
    • B65H2405/58—Means for achieving gripping/releasing operation

Definitions

  • the present invention relates to a tension piece, a transport chain and a means for opening and closing the tension piece.
  • each link is provided with a corresponding tensioning piece, which is opened and closed again when a first sprocket overflows and the packaging film web is thereby clamped.
  • the tensioning piece is opened again and then closed, in which case the packaging film web is released again.
  • clamping elements used are disclosed, for example, in DE 195 25 523, DE 33 15419, DE 23 55 921 and in Fr 81 110 60.
  • the clamping pieces according to the prior art have the disadvantage that they are comparatively complex to manufacture and / or that they wear out comparatively quickly.
  • the present invention was therefore based on the object of providing a clamping piece which does not have the disadvantages of the prior art.
  • a clamping piece with: a bearing bracket with a first and second surface, a gill means which is slidably mounted in the bearing bracket and a clamping piece which cooperates with the first surface and has a foot, the clamping piece and the Foot over a center piece with each other are connected and the center piece has a smaller diameter than the foot and a spring which cooperates with the second surface and the foot.
  • the middle piece and the foot are mounted in the bearing bracket.
  • This embodiment of the present invention has the advantage that the clamping piece is particularly well secured against tilting on the bearing bracket.
  • the clamping means preferably consists of two parts, the clamping piece and the central piece being one part and the foot the other part in a particularly preferred embodiment of the present invention.
  • the clamping piece is also particularly preferably one part and the middle piece and the foot the other part.
  • the connection between the respective parts is preferably made by material and / or frictional connection.
  • the bearing bracket is U-shaped.
  • the bearing tab preferably has a preferably circular recess on the first surface, which interacts with the clamping piece. This embodiment of the present invention improves the clamping of the packaging films.
  • the tensioning piece is preferably part of a transport chain for packaging film webs.
  • the present invention therefore also relates to a transport chain which has the tensioning piece according to the invention.
  • Another object of the present invention is a means for opening and closing a tensioning piece of a transport chain, which has two ramps, the tensioning piece being opened with the first ramp and the closing of the tensioning piece being controlled with the second ramp.
  • the two ramps preferably have an arbitrary angle to one another, which is adjustable in a particularly preferred embodiment of the present invention.
  • the angle is preferably less than 180 °, very particularly preferably less than 130 ° and most preferably less than 90 °.
  • the ramps preferably have a different slope, the slope of the ramp which the clamping piece opens preferably being greater than the ramp with which the clamping piece cooperates during its closing operation.
  • the ramp does not have to be linear, but rather can be designed, for example, in a curve.
  • the means according to the invention is preferably arranged on the same axis of a gearwheel with which a chain, which has the tensioning pieces to be opened and closed, is transported.
  • the agent according to the invention has the advantage that it is simple and inexpensive to manufacture and has little wear.
  • the stress on the clamping pieces is significantly lower in the agent according to the invention than in the prior art.
  • Another object of the present invention is a disc for opening and closing a clamping piece, the axis of rotation of which is offset from the axis of rotation of a toothed wheel with which a chain is transported, which has the clamping pieces.
  • the disk is preferably circular.
  • the disk is also preferably rotatably mounted.
  • the disc is mounted on the same shaft as the chain sprocket.
  • the axis of rotation of the disk and / or the axis of rotation of the gearwheel are preferably inclined with respect to the vertical.
  • Figure 1 shows an embodiment of the gill means.
  • Figure 2 shows another embodiment of the clamping means.
  • Figure 3 shows a further embodiment of the clamping means.
  • Figure 4 shows three embodiments of the closed clamping piece according to the invention in two views.
  • Figure 5 shows three embodiments of the open clamping piece according to the invention in two views.
  • Figure 6 shows an embodiment of the means for opening and closing the clamping piece.
  • Figure 7 shows another embodiment of the means for opening and closing the clamping piece.
  • Figure 8 shows a further embodiment of the means for opening and closing the clamping piece.
  • Figure 1 shows an embodiment of the clamping means 3 of the clamping piece according to the invention.
  • the clamping means 3 is divided into two parts, in the present case the clamping piece 4 and the middle piece 7 being one part and the foot 5 the other part.
  • the middle piece 7 and the foot 5 are screwed together.
  • the screw connection can be secured, for example, by an adhesive.
  • the clamping piece 7 has an annular bulge 24 with which the film is pressed against a bearing bracket (not shown).
  • FIG. 2 shows another embodiment of the clamping means.
  • This clamping means 3 essentially corresponds to the clamping means according to FIG. 1, with the exception that in the present case the middle piece 7 and the foot 5 are pressed together.
  • FIG. 3 shows a further embodiment of the clamping means 3.
  • the clamping means 3 is divided into two parts, in the present case the foot 5 and the middle piece 7 being one part and the clamping piece 4 the other part.
  • the middle piece 7 is connected to the clamping piece 4 by a flange 26. Otherwise, the comments on FIG. 1 apply.
  • FIG. 4 shows three embodiments of the closed clamping piece 1 according to the invention in two views.
  • the clamping pieces 1 each consist of a U-shaped mounting bracket 2, in which the clamping means 3 is mounted so that it can move substantially along its central axis.
  • the clamping means 3 correspond to the clamping means according to FIGS. 1-3.
  • Each clamping means 3 has a clamping piece 4, a middle piece 7 and a foot 5, which are connected to one another.
  • the clamping piece 4 interacts with the first surface 6 of the bearing bracket 2 in such a way that a film can be clamped in between.
  • the clamping piece has a bulge 24 and the surface 6 has a bulge 23, so that the film is clamped along a segment of a circular ring.
  • the center piece 7 is slidably mounted in a bore in the bearing bracket 2.
  • the foot 5 is slidably mounted in a further hole in the bearing bracket 2.
  • a spring 8 is arranged in the region of the middle piece 7 and acts on one side with the foot 5 and on the other side with the surface 25 of the bearing bracket 2 together so that the clamping piece 4 is pulled against the surface 6 of the bearing bracket 2.
  • the tensioning piece 1 according to the invention is in each case attached to the links 9 of a transport chain. With the transport chain, for example, film webs are transported in a packaging machine.
  • FIG 5 shows the three embodiments of the clamping piece according to the invention according to Figure 4 in the open state.
  • the opening takes place by a compressive force F, which acts on the foot 5 of the clamping means 3 from below and presses the clamping means 3 upwards relative to the bearing bracket 2, so that a gap 10 arises between the clamping piece 4 and the first surface 6, into which the film edge (not shown) can be inserted.
  • the person skilled in the art recognizes that the force F need not act directly from below.
  • the spring 8 is compressed between the second surface 25 and the foot 5.
  • the force F is reduced so that the restoring force of the spring closes the gap 10 again and the film edge is clamped between the clamping piece 4 and the surface 6.
  • the recess 24 is visible in the surface 6, which cooperates with the bulge 23, so that the film edge is clamped in along a circular ring segment.
  • the clamping piece according to the invention can be opened and closed as often as desired.
  • FIG. 6 shows an embodiment of a means 14 according to the invention for opening and closing the tensioning piece 3, which is in each case attached to a link 9 of the transport chain 13 (only partially shown).
  • the transport chain 13 is driven and / or deflected by the gear 17.
  • the direction of travel of the transport chain 13 is shown by the arrow.
  • the means 14 is arranged on the same shaft 18 as the gear 17 but stationary.
  • the means 14 has two ramps 15, 16.
  • the feet 5 of the clamping piece 1 first run over the ramp 15 and are pressed upwards, so that the clamping piece 1 opens gradually. After opening and after the film edge (not shown) has been inserted, the foot 5 runs along the ramp 16 and the clamping piece 1 slowly closes again until it is completely closed and the film web is clamped.
  • the ramps can each have any shape that optimally matches the Desired opening or closing behavior of the clamping piece is adjusted. The faster the clamping piece is to be opened or closed, the steeper the ramp must be and vice versa. However, it is also quite conceivable that the ramps have the shape of a curve and / or that the ramps 15, 16 are each designed differently in length and / or slope.
  • the ramps have the particular advantage that an abrupt opening or closing of the clamping piece, as is customary in the case of means for opening or closing the clamping piece according to the prior art, is avoided, as a result of which wear and tear and / or tearing of the clamped film is reduced.
  • FIG. 7 shows another embodiment of a means according to the invention for opening and closing the clamping piece, which differs from the means according to FIG. 6 in that the angle of the two ramps 15, 16 to one another is smaller in the present example than in the example according to FIG Figure 6.
  • Figure 8 shows a further embodiment of a means for opening and closing the clamping piece, which is attached to a link 9 of the transport chain 13 (only partially shown).
  • the transport chain 13 is driven and / or deflected by the gear 17.
  • the direction of travel of the transport chain 13 is shown by the arrow.
  • the means is a rotatably mounted disk 20, the axis of rotation 21 of which is offset from the axis of rotation 22 of the gear wheel 17.
  • the clamping means 3 is displaced in the bearing bracket 2 such that a gap 10 is formed between the clamping piece 4 and the surface of the bearing bracket, into which the film edge can be inserted.
  • the clamping piece is closed analogously.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Advancing Webs (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Replacement Of Web Rolls (AREA)
  • Basic Packing Technique (AREA)
  • Chain Conveyers (AREA)
  • Holders For Apparel And Elements Relating To Apparel (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

The invention relates to a tensioning piece, a conveyor chain, and to a means for opening and closing said tensioning piece.

Description

Spannstück einer Transportkette für eine FolienbahnTensioner of a transport chain for a film web
Die vorliegende Erfindung betrifft ein Spannstück, eine Transportkette und ein Mittel zum Öffnen und Schließen des Spannstücks.The present invention relates to a tension piece, a transport chain and a means for opening and closing the tension piece.
Beim Transportieren von Verpackungsfolienbahnen auf Verpackungsmaschinen ist es erforderlich die Verpackungsfolienbahnen straff zu spannen und sie dabei gleichzeitig zu fördern, wobei die Verpackungsfolienbahn am Anfang der Maschine eingespannt und am Ende der Verpackungsmaschine wieder freigegeben wird. Das beständige wechselnde Spannen und Freigeben der Verpackungsfolienbahn verlangt einen Mechanismus, mit dem diese Vorgänge mit einfachen Mitteln und großer Sicherheit ausgeführt werden können. Gemäß dem Stand der Technik haben sich dafür Ketten bewährt, bei denen jedes Glied mit einem entsprechenden Spannstück versehen ist, das beim Überlaufen eines ersten Kettenrades jeweils geöffnet und wieder geschlossen wird und die Verpackungsfolienbahn dabei eingespannt wird. Beim Überlaufen eines zweiten Kettenrades wird das Spannstück wiederum geöffnet und dann geschlossen, wobei in diesem Fall die Verpackungsfolienbahn wieder freigegeben wird.When transporting packaging film webs on packaging machines, it is necessary to tighten the packaging film webs tightly and at the same time convey them, the packaging film web being clamped at the beginning of the machine and released again at the end of the packaging machine. The constantly changing tensioning and releasing of the packaging film web requires a mechanism with which these operations can be carried out with simple means and with great security. According to the prior art, chains have proven useful for this, in which each link is provided with a corresponding tensioning piece, which is opened and closed again when a first sprocket overflows and the packaging film web is thereby clamped. When a second sprocket overflows, the tensioning piece is opened again and then closed, in which case the packaging film web is released again.
Die dabei verwendeten Spannelemente sind beispielsweise in der DE 195 25 523, der DE 33 15419, der DE 23 55 921 und in der Fr 81 110 60 offenbart. Die Spannstücke gemäß dem Stand der Technik haben jedoch den Nachteil, dass sie vergleichsweise aufwendig herzustellen sind und/oder dass sie vergleichsweise schnell abnutzen.The clamping elements used are disclosed, for example, in DE 195 25 523, DE 33 15419, DE 23 55 921 and in Fr 81 110 60. However, the clamping pieces according to the prior art have the disadvantage that they are comparatively complex to manufacture and / or that they wear out comparatively quickly.
Der vorliegenden Erfindung lag deshalb die Aufgabe zugrunde ein Spannstück zur Verfügung zu stellen, das die Nachteile des Standes der Technik nicht aufweist.The present invention was therefore based on the object of providing a clamping piece which does not have the disadvantages of the prior art.
Gelöst wird die Aufgabe erfindungsgemäß mit einem Spannstück mit: einer Lagerlasche mit einer ersten und zweiten Oberfläche, einem Kiemmittel, das in der Lagerlasche verschieblich gelagert ist und das ein Klemmstück, das mit der ersten Oberfläche zusammenwirkt und einen Fuß aufweist, wobei das Klemmstück und der Fuß über ein Mittelstück miteinander verbunden sind und das Mittelstück einen geringeren Durchmesser aufweist als der Fuß und einer Feder, die mit der zweiten Oberfläche und dem Fuß zusammenwirkt.The object is achieved according to the invention with a clamping piece with: a bearing bracket with a first and second surface, a gill means which is slidably mounted in the bearing bracket and a clamping piece which cooperates with the first surface and has a foot, the clamping piece and the Foot over a center piece with each other are connected and the center piece has a smaller diameter than the foot and a spring which cooperates with the second surface and the foot.
Vorteilhafte Ausführungsformen des erfindungsgemäßen Spannstücks sind in den Unteransprüchen beansprucht.Advantageous embodiments of the clamping piece according to the invention are claimed in the subclaims.
In einer bevorzugt Ausführungsform der vorliegenden Erfindung sind das Mittelstück und der Fuß in der Lagerlasche gelagert. Diese Ausführungsform der vorliegenden Erfindung hat den Vorteil, dass das Klemmstück besonders gut gegen eine Verkantung an der Lagerlasche gesichert ist.In a preferred embodiment of the present invention, the middle piece and the foot are mounted in the bearing bracket. This embodiment of the present invention has the advantage that the clamping piece is particularly well secured against tilting on the bearing bracket.
Vorzugsweise besteht das Klemmittel aus zwei Teilen, wobei in einer besonders bevorzugten Ausführungsform der vorliegenden Erfindung das Klemmstück und das Mittelstück ein Teil sowie der Fuß das andere Teil ist. Ebenfalls besonders bevorzugt ist das Klemmstück ein Teil sowie das Mittelstück und der Fuß das andere Teil. Die Verbindung zwischen den jeweiligen Teilen erfolgt vorzugsweise durch Stoff- und/oder Kraftschluß.The clamping means preferably consists of two parts, the clamping piece and the central piece being one part and the foot the other part in a particularly preferred embodiment of the present invention. The clamping piece is also particularly preferably one part and the middle piece and the foot the other part. The connection between the respective parts is preferably made by material and / or frictional connection.
In einer bevorzugten Ausführungsform der vorliegenden Erfindung ist die Lagerlasche U-förmig.In a preferred embodiment of the present invention, the bearing bracket is U-shaped.
Weiterhin bevorzugt weist die Lagerlasche auf der ersten Oberfläche, die mit dem Klemmstück zusammenwirkt eine vorzugsweise kreisförmige Ausnehmung auf. Durch diese Ausführungsform der vorliegenden Erfindung wird die Einspannung der Verpackungsfolien verbessert.Furthermore, the bearing tab preferably has a preferably circular recess on the first surface, which interacts with the clamping piece. This embodiment of the present invention improves the clamping of the packaging films.
Es war für den Fachmann überaus erstaunlich und nicht zu erwarten, dass das erfindungsgemäße Spannstück einfach und kostengünstig herzustellen ist. Darüber hinaus zeichnet sich das Spannstück durch einen geringen Verschleiß aus. Das Spannstück ist vorzugsweise Teil einer Transportkette für Verpackungsfolienbahnen. Gegenstand der vorliegenden Erfindung ist deshalb auch eine Transportkette, die das erfindungsgemäße Spannstück aufweist.It was extremely surprising for the person skilled in the art and it was not to be expected that the clamping piece according to the invention can be produced simply and inexpensively. In addition, the clamping piece is characterized by low wear. The tensioning piece is preferably part of a transport chain for packaging film webs. The present invention therefore also relates to a transport chain which has the tensioning piece according to the invention.
Ein weiterer Gegenstand der vorliegenden Erfindung ist ein Mittel zum Öffnen und Schließen eines Spannstückes einer Transportkette, das zwei Rampen aufweist, wobei mit der ersten Rampe das Spannstück geöffnet und mit der zweiten Rampe das Schließen des Spannstücks gesteuert wird.Another object of the present invention is a means for opening and closing a tensioning piece of a transport chain, which has two ramps, the tensioning piece being opened with the first ramp and the closing of the tensioning piece being controlled with the second ramp.
Vorzugsweise weisen die beiden Rampen einen beliebigen Winkel zueinander auf, der in einer besonders bevorzugten Ausführungsform der vorliegenden Erfindung einstellbar ist. Vorzugsweise ist der Winkel jedoch kleiner 180°, ganz besonders bevorzugt kleiner 130° und am meisten bevorzugt kleiner 90°.The two ramps preferably have an arbitrary angle to one another, which is adjustable in a particularly preferred embodiment of the present invention. However, the angle is preferably less than 180 °, very particularly preferably less than 130 ° and most preferably less than 90 °.
Weiterhin bevorzugt weisen die Rampen vorzugsweise eine unterschiedliche Steigung auf, wobei die Steigung der Rampe, die das Spannstück öffnet vorzugsweise größer ist als die Rampe mit der das Spannstück während seines Schließvorganges zusammenwirkt. Der Fachmann erkennt, dass die Rampe auch nicht linear sein muß sondern beispielsweise kurvenförmig gestaltet sein kann.Furthermore, the ramps preferably have a different slope, the slope of the ramp which the clamping piece opens preferably being greater than the ramp with which the clamping piece cooperates during its closing operation. The person skilled in the art recognizes that the ramp does not have to be linear, but rather can be designed, for example, in a curve.
Vorzugsweise ist das erfindungsgemäße Mittel auf derselben Achse eines Zahnrades angeordnet, mit dem eine Kette, die die zu öffnenden und zu schließenden Spannstücke aufweist, transportiert wird, angeordnet.The means according to the invention is preferably arranged on the same axis of a gearwheel with which a chain, which has the tensioning pieces to be opened and closed, is transported.
Das erfindungsgemäße Mittel hat den Vorteil, dass es einfach und kostengünstig herzustellen ist und eine geringe Abnutzung aufweist. Die Beanspruchung der Spannstücke ist bei dem erfindungsgemäßen Mittel wesentlich geringer als beim Stand der Technik.The agent according to the invention has the advantage that it is simple and inexpensive to manufacture and has little wear. The stress on the clamping pieces is significantly lower in the agent according to the invention than in the prior art.
Ein weiterer Gegenstand der vorliegenden Erfindung ist eine Scheibe zum Öffnen und Schließen eines Spannstückes, deren Drehachse zur Drehachse eines Zahnrades, mit dem eine Kette transportiert wird, die die Spannstücke aufweist, versetzt angeordnet ist. Vorzugsweise ist die Scheibe kreisförmig.Another object of the present invention is a disc for opening and closing a clamping piece, the axis of rotation of which is offset from the axis of rotation of a toothed wheel with which a chain is transported, which has the clamping pieces. The disk is preferably circular.
Weiterhin bevorzugt ist die Scheibe drehbar gelagert.The disk is also preferably rotatably mounted.
In einerweiteren bevorzugten Ausführungsform ist die Scheibe auf derselben Welle wie das Zahnrad der Kette gelagert. Vorzugsweise sind die Drehachse der Scheibe und/oder die Drehachse des Zahnrades gegenüber der Vertikalen geneigt.In a further preferred embodiment, the disc is mounted on the same shaft as the chain sprocket. The axis of rotation of the disk and / or the axis of rotation of the gearwheel are preferably inclined with respect to the vertical.
Im folgenden wird die Erfindung anhand der Figuren 1 - 8 erläutert. Diese Erläuterungen sind lediglich beispielhaft und schränken den allgemeinen Erfindungsgedanken nicht ein.The invention is explained below with reference to FIGS. 1-8. These explanations are only examples and do not limit the general inventive concept.
Figur 1 zeigt eine Ausführungsform des Kiemmittels.Figure 1 shows an embodiment of the gill means.
Figur 2 zeigt eine andere Ausführungsform des Klemmittels.Figure 2 shows another embodiment of the clamping means.
Figur 3 zeigt eine weitere Ausführungsform des Klemmittels.Figure 3 shows a further embodiment of the clamping means.
Figur 4 zeigt drei Ausführungsformen des erfindungsgemäßen, geschlossenen Spannstücks in jeweils zwei Ansichten.Figure 4 shows three embodiments of the closed clamping piece according to the invention in two views.
Figur 5 zeigt drei Ausführungsformen des erfindungsgemäßen, geöffneten Spannstücks in jeweils zwei Ansichten.Figure 5 shows three embodiments of the open clamping piece according to the invention in two views.
Figur 6 zeigt eine Ausführungsform des Mittels zum Öffnen und Schließen des Spannstückes.Figure 6 shows an embodiment of the means for opening and closing the clamping piece.
Figur 7 zeigt eine andere Ausführungsform des Mittels zum Öffnen und Schließen des Spannstückes.Figure 7 shows another embodiment of the means for opening and closing the clamping piece.
Figur 8 zeigt eine weitere Ausführungsform des Mittels zum Öffnen und Schließen des Spannstückes. Figur 1 zeigt eine Ausführungsform des Klemmittels 3 des erfindungsgemäßen Spannstücks. Das Klemmittel 3 ist zweigeteilt, wobei in dem vorliegenden Fall das Klemmstück 4 und das Mittelstück 7 ein Teil und der Fuß 5 das andere Teil darstellen. Das Mittelstück 7 und der Fuß 5 sind miteinander verschraubt. Die Schraubverbindung kann beispielsweise durch einen Klebstoff gesichert werden. Das Klemmstück 7 weist eine kreisringförmige Ausbuchtung 24 auf, mit der die Folie gegen eine Lagerlasche (nicht dargestellt) gedrückt wird.Figure 8 shows a further embodiment of the means for opening and closing the clamping piece. Figure 1 shows an embodiment of the clamping means 3 of the clamping piece according to the invention. The clamping means 3 is divided into two parts, in the present case the clamping piece 4 and the middle piece 7 being one part and the foot 5 the other part. The middle piece 7 and the foot 5 are screwed together. The screw connection can be secured, for example, by an adhesive. The clamping piece 7 has an annular bulge 24 with which the film is pressed against a bearing bracket (not shown).
Figur 2 zeigt eine andere Ausführungsform des Klemmittels. Dieses Klemmittel 3 entspricht im wesentlichen dem Klemmittel gemäß Figur 1 , mit der Ausnahme, dass in dem vorliegenden Fall das Mittelstück 7 und der Fuß 5 miteinander verpreßt sind.Figure 2 shows another embodiment of the clamping means. This clamping means 3 essentially corresponds to the clamping means according to FIG. 1, with the exception that in the present case the middle piece 7 and the foot 5 are pressed together.
Figur 3 zeigt eine weitere Ausführungsform des Klemmittels 3. Das Klemmittel 3 ist zweigeteilt, wobei in dem vorliegenden Fall der Fuß 5 und das Mittelstück 7 ein Teil und das Klemmstück 4 das andere Teil darstellen. Das Mittelstück 7 ist mit dem Klemmstück 4 durch eine Bördelung 26 verbunden. Ansonsten gelten die Ausführungen zu Figur 1.Figure 3 shows a further embodiment of the clamping means 3. The clamping means 3 is divided into two parts, in the present case the foot 5 and the middle piece 7 being one part and the clamping piece 4 the other part. The middle piece 7 is connected to the clamping piece 4 by a flange 26. Otherwise, the comments on FIG. 1 apply.
Figur 4 zeigt drei Ausführungsformen des erfindungsgemäßen geschlossenen Spannstücks 1 in jeweils zwei Ansichten. Die Spannstücke 1 bestehen jeweils aus einer U-förmigen Lagerlasche 2, in der das Klemmittel 3 im wesentlichen entlang seiner Mittelachse verschieblich gelagert ist. Die Klemmittel 3 entsprechen den Klemmitteln gemäß den Figuren 1 - 3. Jedes Klemmittel 3 weist ein Klemmstück 4, ein Mittelstück 7 und einen Fuß 5 auf, die miteinander verbunden sind. Das Klemmstück 4 wirkt mit der ersten Oberfläche 6 der Lagerlasche 2 so zusammen, dass eine Folie dazwischen einspannbar ist. In dem vorliegenden Fall weist das Klemmstück eine Ausbuchtung 24 und die Oberfläche 6 eine Einbuchtung 23 auf, so dass die Folie entlang eines Segmentes eines Kreisrings eingespannt wird. Das Mittelstück 7 ist in einer Bohrung in der Lagerlasche 2 verschieblich gelagert. Der Fuß 5 ist in einer weiteren Bohrung in der Lagerlasche 2 verschieblich gelagert. Eine Feder 8 ist im Bereich des Mittelstücks 7 angeordnet und wirkt auf der einen Seite mit dem Fuß 5 und auf der anderen Seite mit der Oberfläche 25 der Lagerlasche 2 zusammen, so dass das Klemmstück 4 gegen die Oberfläche 6 der Lagerlasche 2 gezogen wird. Das erfindungsgemäße Spannstück 1 ist jeweils an den Gliedern 9 einer Transportkette angebracht. Mit der Transportkette werden beispielsweise Folienbahnen in einer Verpackungsmaschine transportiert.Figure 4 shows three embodiments of the closed clamping piece 1 according to the invention in two views. The clamping pieces 1 each consist of a U-shaped mounting bracket 2, in which the clamping means 3 is mounted so that it can move substantially along its central axis. The clamping means 3 correspond to the clamping means according to FIGS. 1-3. Each clamping means 3 has a clamping piece 4, a middle piece 7 and a foot 5, which are connected to one another. The clamping piece 4 interacts with the first surface 6 of the bearing bracket 2 in such a way that a film can be clamped in between. In the present case, the clamping piece has a bulge 24 and the surface 6 has a bulge 23, so that the film is clamped along a segment of a circular ring. The center piece 7 is slidably mounted in a bore in the bearing bracket 2. The foot 5 is slidably mounted in a further hole in the bearing bracket 2. A spring 8 is arranged in the region of the middle piece 7 and acts on one side with the foot 5 and on the other side with the surface 25 of the bearing bracket 2 together so that the clamping piece 4 is pulled against the surface 6 of the bearing bracket 2. The tensioning piece 1 according to the invention is in each case attached to the links 9 of a transport chain. With the transport chain, for example, film webs are transported in a packaging machine.
Figur 5 zeigt die drei Ausführungsformen des erfindungsgemäßen Spannstücks gemäß Figur 4 in geöffnetem Zustand. Die Öffnung erfolgt durch eine Druckkraft F, die von unten auf den Fuß 5 des Klemmittels 3 wirkt und das Klemmittel 3 relativ zu der Lagerlasche 2 nach oben drückt, so dass zwischen dem Klemmstück 4 und der ersten Oberfläche 6 ein Spalt 10 entsteht, in den der Folienrand (nicht dargestellt) eingeführt werden kann. Der Fachmann erkennt, dass die Kraft F nicht direkt von unten wirken muß. Durch das Verschieben des Klemmittels 3 nach oben wird die Feder 8 zwischen der zweiten Oberfläche 25 und dem Fuß 5 komprimiert. Nachdem der Folienrand in den Spalt 10 eingeführt worden ist, wird die Kraft F so vermindert, dass die Rückstellkraft der Feder den Spalt 10 wieder schließt und der Folienrand zwischen dem Klemmstück 4 und der Oberfläche 6 eingespannt wird. Im geöffneten Zustand ist die Ausnehmung 24 in der Oberfläche 6 sichtbar, die mit der Ausbuchtung 23 zusammenwirkt, so dass das Einklemmen des Folienrandes entlang eines Kreisringsegmentes erfolgt. Der Fachmann erkennt, dass das Öffnen und Schließen des erfindungsgemäßen Spannstückes beliebig oft erfolgen kann.Figure 5 shows the three embodiments of the clamping piece according to the invention according to Figure 4 in the open state. The opening takes place by a compressive force F, which acts on the foot 5 of the clamping means 3 from below and presses the clamping means 3 upwards relative to the bearing bracket 2, so that a gap 10 arises between the clamping piece 4 and the first surface 6, into which the film edge (not shown) can be inserted. The person skilled in the art recognizes that the force F need not act directly from below. By moving the clamping means 3 upwards, the spring 8 is compressed between the second surface 25 and the foot 5. After the film edge has been inserted into the gap 10, the force F is reduced so that the restoring force of the spring closes the gap 10 again and the film edge is clamped between the clamping piece 4 and the surface 6. In the open state, the recess 24 is visible in the surface 6, which cooperates with the bulge 23, so that the film edge is clamped in along a circular ring segment. The person skilled in the art recognizes that the clamping piece according to the invention can be opened and closed as often as desired.
Figur 6 zeigt eine Ausführungsform eines erfindungsgemäßen Mittels 14 zum Öffnen und Schließen des Spannstückes 3, das jeweils an einem Glied 9 der Transportkette 13 (nur teilweise dargestellt) angebracht ist. Die Transportkette 13 wird durch das Zahnrad 17 angetrieben und/oder umgelenkt. Die Laufrichtung der Transportkette 13 ist durch den Pfeil dargestellt. Das Mittel 14 ist auf derselben Welle 18 wie das Zahnrad 17 jedoch ortsfest angeordnet. Das Mittel 14 weist zwei Rampen 15, 16 auf. Die Füße 5 der Spannstück 1 laufen zunächst über die Rampe 15 und werden dabei nach oben gedrückt, so dass sich das Spannstück 1 allmählich öffnet. Nachdem Öffnen und nachdem der Folienrand (nicht dargestellt) eingelegt wurde, läuft der Fuß 5 entlang der Rampe 16 und das Spannstück 1 schließt sich langsam wieder bis es völlig geschlossen und die Folienbahn eingespannt ist. Der Fachmann erkennt, dass die Rampen jeweils eine beliebige Form aufweisen können, die optimal an das gewünschte Öffnungs- bzw. Schließungsverhalten des Spannstückes angepaßt ist. Je schneller das Öffnen- bzw. Schließen des Spannstückes erfolgen soll, desto steiler muß die Rampe sein und umgekehrt. Es ist jedoch auch durchaus denkbar, dass die Rampen die Form einer Kurve aufweisen und/oder dass die Rampen 15, 16 jeweils unterschiedlich in Länge und/oder Steigung gestaltet sind. Die Rampen haben insbesondere den Vorteil, dass ein abruptes Öffnen bzw. Schließen des Spannstückes, wie es bei Mitteln zum Öffnen- bzw. Schließen des Spannstückes gemäß dem Stand der Technik üblich ist, vermieden wird, wodurch Verschleiß und ein Verwerfen und/oder Einreißen der eingespannten Folie vermindert wird.FIG. 6 shows an embodiment of a means 14 according to the invention for opening and closing the tensioning piece 3, which is in each case attached to a link 9 of the transport chain 13 (only partially shown). The transport chain 13 is driven and / or deflected by the gear 17. The direction of travel of the transport chain 13 is shown by the arrow. The means 14 is arranged on the same shaft 18 as the gear 17 but stationary. The means 14 has two ramps 15, 16. The feet 5 of the clamping piece 1 first run over the ramp 15 and are pressed upwards, so that the clamping piece 1 opens gradually. After opening and after the film edge (not shown) has been inserted, the foot 5 runs along the ramp 16 and the clamping piece 1 slowly closes again until it is completely closed and the film web is clamped. The person skilled in the art recognizes that the ramps can each have any shape that optimally matches the Desired opening or closing behavior of the clamping piece is adjusted. The faster the clamping piece is to be opened or closed, the steeper the ramp must be and vice versa. However, it is also quite conceivable that the ramps have the shape of a curve and / or that the ramps 15, 16 are each designed differently in length and / or slope. The ramps have the particular advantage that an abrupt opening or closing of the clamping piece, as is customary in the case of means for opening or closing the clamping piece according to the prior art, is avoided, as a result of which wear and tear and / or tearing of the clamped film is reduced.
Figur 7 zeigt eine andere Ausführungsform eines erfindungsgemäßen Mittels zum Öffnen und Schließen des Spannstückes, das sich im Vergleich zu dem Mittel gemäß Figur 6 dadurch unterscheidet, dass der Winkel der beiden Rampen 15, 16 zueinander in dem vorliegenden Beispiel kleiner ist als in dem Beispiel gemäß Figur 6.FIG. 7 shows another embodiment of a means according to the invention for opening and closing the clamping piece, which differs from the means according to FIG. 6 in that the angle of the two ramps 15, 16 to one another is smaller in the present example than in the example according to FIG Figure 6.
Figur 8 zeigt eine weitere Ausführungsform eines Mittels zum Öffnen und Schließen des Spannstückes, das jeweils an einem Glied 9 der Transportkette 13 (nur teilweise dargestellt) angebracht ist. Die Transportkette 13 wird durch das Zahnrad 17 angetrieben und/oder umgelenkt. Die Laufrichtung der Transportkette 13 ist durch den Pfeil dargestellt. Das Mittel ist in dem vorliegenden Fall ein drehbar gelagerte Scheibe 20, deren Drehachse 21 zur Drehachse 22 des Zahnrades 17 versetzt angeordnet ist. Sobald der Fuß 5 mit der Scheibe 20 in Berührung kommt, wird das Klemmittel 3 in der Lagerlasche 2 so verschoben, dass sich ein Spalt 10 zwischen dem Klemmstück 4 und der Oberfläche der Lagerlasche ausbildet, in den der Folienrand eingeführt werden kann. Das Schließen des Spannstückes erfolgt analog. Figure 8 shows a further embodiment of a means for opening and closing the clamping piece, which is attached to a link 9 of the transport chain 13 (only partially shown). The transport chain 13 is driven and / or deflected by the gear 17. The direction of travel of the transport chain 13 is shown by the arrow. In the present case, the means is a rotatably mounted disk 20, the axis of rotation 21 of which is offset from the axis of rotation 22 of the gear wheel 17. As soon as the foot 5 comes into contact with the disk 20, the clamping means 3 is displaced in the bearing bracket 2 such that a gap 10 is formed between the clamping piece 4 and the surface of the bearing bracket, into which the film edge can be inserted. The clamping piece is closed analogously.

Claims

Patentansprüche: claims:
1. Spannstück (1) mit: einer Lagerlasche (2) mit einer ersten und zweiten Oberfläche (6, 25), einem Klemmittel (3), das in der Lagerlasche (2) verschieblich gelagert ist und das ein Klemmstück (4), das mit der ersten Oberfläche (6) zusammenwirkt und einen Fuß (5) aufweist, wobei das Klemmstück (4) und der Fuß (5) über ein Mittelstück (7) miteinander verbunden sind und das Mittelstück (7) einen geringeren Durchmesser aufweist als der Fuß (5) und einer Feder (8), die mit der zweiten Oberfläche (25) und dem Fuß (5) zusammenwirkt.1. clamping piece (1) with: a bearing bracket (2) with a first and second surface (6, 25), a clamping means (3) which is slidably mounted in the bearing bracket (2) and which is a clamping piece (4) that cooperates with the first surface (6) and has a foot (5), the clamping piece (4) and the foot (5) being connected to one another via a middle piece (7) and the middle piece (7) having a smaller diameter than the foot (5) and a spring (8) which cooperates with the second surface (25) and the foot (5).
2. Spannstück nach Anspruch 1 , dadurch gekennzeichnet, dass das Mittelstück (7) und der Fuß (5) in der Lagerlasche verschieblich gelagert sind.2. Clamping piece according to claim 1, characterized in that the middle piece (7) and the foot (5) are slidably mounted in the bearing bracket.
3. Spannstück nach Anspruch 2, dadurch gekennzeichnet, dass das Klemmittel3. Clamping piece according to claim 2, characterized in that the clamping means
(3) aus zwei Teilen besteht.(3) consists of two parts.
4. Spannstück nach Anspruch 3, dadurch gekennzeichnet, dass das Klemmstück4. Clamping piece according to claim 3, characterized in that the clamping piece
(4) sowie das Mittelstück (7) das eine Teil und der Fuß (5) das andere Teil ist.(4) and the center piece (7) is one part and the foot (5) is the other part.
5. Spannstück nach Anspruch 3, dadurch gekennzeichnet, dass das Klemmstück (4) das eine Teil und das Mittelstück (7) sowie der Fuß (5) das andere Teil ist.5. clamping piece according to claim 3, characterized in that the clamping piece (4) is one part and the middle piece (7) and the foot (5) is the other part.
6. Spannstück nach einem der Ansprüche 3 - 5, dadurch gekennzeichnet, dass das die Verbindung zwischen den Teilen ein Stoff- und/oder Kraftschluß ist.6. Clamping piece according to one of claims 3-5, characterized in that the connection between the parts is a material and / or frictional connection.
7. Spannstück nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass die Lagerlasche (2) U-förmig ist. 7. Clamping piece according to one of the preceding claims, characterized in that the bearing bracket (2) is U-shaped.
8. Spannstück nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass die Lagerlasche (2) auf der ersten Oberfläche (6) eine vorzugsweise kreisringförmige Ausnehmung (23) aufweist.8. Clamping piece according to one of the preceding claims, characterized in that the bearing tab (2) on the first surface (6) has a preferably circular recess (23).
9. Spannstück nach Anspruch 8, dadurch gekennzeichnet ,dass das Klemmstück (4) eine vorzugsweise kreisringförmige Ausbuchtung (24) aufweist, die mit der Ausnehmung (23) zusammenwirkt.9. clamping piece according to claim 8, characterized in that the clamping piece (4) has a preferably annular bulge (24) which cooperates with the recess (23).
10. Spannstück nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass es Teil einer Kette (13) ist, vorzugsweise einer Transportkette für Folienbahnen ist.10. Tensioning piece according to one of the preceding claims, characterized in that it is part of a chain (13), preferably a transport chain for film webs.
11. Transportkette, vorzugsweise für Folienbahnen, dadurch gekennzeichnet , dass sie Spannstücke gemäß einem der Ansprüche 1 - 9 aufweist.11. Transport chain, preferably for film webs, characterized in that it has tensioning pieces according to one of claims 1-9.
12. Mittel (14) zum Öffnen und Schließen des Spannstückes (1 ) gemäß einem der Ansprüche 1 - 10, dadurch gekennzeichnet, dass es zwei Rampen (15, 16) aufweist, wobei mit der Rampe (15) das Spannstück (1) geöffnet und mit der Rampe (16) das Schließen des Spannstückes (1) gesteuert wird.12. Means (14) for opening and closing the clamping piece (1) according to one of claims 1-10, characterized in that it has two ramps (15, 16), with the ramp (15) the clamping piece (1) opened and the closing of the clamping piece (1) is controlled with the ramp (16).
13. Mittel nach Anspruch 11 , dadurch gekennzeichnet, dass die Rampen (15, 16) in einem Winkel < 180°, vorzugsweise < 130°, besonders bevorzugt < 90° zueinander angeordnet sind.13. Means according to claim 11, characterized in that the ramps (15, 16) are arranged at an angle of <180 °, preferably <130 °, particularly preferably <90 ° to one another.
14. Mittel nach einem der Ansprüche 12 - 13, dadurch gekennzeichnet, dass die Steigung der Rampen (15, 16) jeweils unterschiedlich ist.14. Means according to one of claims 12 - 13, characterized in that the slope of the ramps (15, 16) is different in each case.
15. Mittel (19) zum Öffnen und Schließen des Spannstückes (1) gemäß einem der Ansprüche 1 - 10, dadurch gekennzeichnet, dass es eine kreisförmige Scheibe (20) ist, deren Drehachse (21 ) zur Drehachse (22) eines Zahnrades (17), mit dem eine Kette (13) transportiert wird, die die Spannstücke (1 ) aufweist, versetzt angeordnet ist. 15. Means (19) for opening and closing the clamping piece (1) according to one of claims 1-10, characterized in that it is a circular disc (20) whose axis of rotation (21) to the axis of rotation (22) of a gear wheel (17th ), with which a chain (13) is transported, which has the tensioning pieces (1), is arranged offset.
16. Mittel nach Anspruch 15, dadurch gekennzeichnet, dass es drehbar gelagert ist.16. Composition according to claim 15, characterized in that it is rotatably mounted.
17. Mittel nach einem der Ansprüche 12 - 16, dadurch gekennzeichnet, dass es auf derselben Welle (18) wie das Zahnrad (17) der Kette (13) gelagert ist.17. Composition according to one of claims 12 - 16, characterized in that it is mounted on the same shaft (18) as the gear (17) of the chain (13).
18. Mittel nach einem der Ansprüche 12 - 17, dadurch gekennzeichnet, dass die Drehachse (21 ) und/oder die Drehachse (22) gegenüber der vertikalen geneigt sind. 18. Means according to one of claims 12 - 17, characterized in that the axis of rotation (21) and / or the axis of rotation (22) are inclined relative to the vertical.
EP03788987A 2002-11-05 2003-10-31 Tensioning piece of a conveyor chain for a film web Expired - Lifetime EP1560753B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10251740 2002-11-05
DE10251740A DE10251740A1 (en) 2002-11-05 2002-11-05 Clamping piece for conveyor chain for film packing sheet has support bracket with first and second surface, and clamping element movably mounted in support bracket and with clamping component interacting with first surface
PCT/EP2003/012118 WO2004041650A1 (en) 2002-11-05 2003-10-31 Tensioning piece of a conveyor chain for a film web

Publications (2)

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EP1560753A1 true EP1560753A1 (en) 2005-08-10
EP1560753B1 EP1560753B1 (en) 2008-02-20

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EP (1) EP1560753B1 (en)
CN (1) CN1735534A (en)
AT (1) ATE386686T1 (en)
AU (1) AU2003293641A1 (en)
DE (2) DE10251740A1 (en)
ES (1) ES2300643T3 (en)
PL (1) PL375147A1 (en)
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WO (1) WO2004041650A1 (en)

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US7398875B2 (en) 2008-07-15
WO2004041650A1 (en) 2004-05-21
RU2341426C2 (en) 2008-12-20
PL375147A1 (en) 2005-11-28
US20060131137A1 (en) 2006-06-22
CN1735534A (en) 2006-02-15
ATE386686T1 (en) 2008-03-15
AU2003293641A1 (en) 2004-06-07
RU2005117776A (en) 2006-02-20
DE10251740A1 (en) 2004-05-13
ES2300643T3 (en) 2008-06-16
DE50309218D1 (en) 2008-04-03
EP1560753B1 (en) 2008-02-20

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