EP1928747B1 - Apparatus for strapping articles and profile strip, in particular for covering the band channel of the article-strapping apparatus - Google Patents

Apparatus for strapping articles and profile strip, in particular for covering the band channel of the article-strapping apparatus Download PDF

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Publication number
EP1928747B1
EP1928747B1 EP06805675A EP06805675A EP1928747B1 EP 1928747 B1 EP1928747 B1 EP 1928747B1 EP 06805675 A EP06805675 A EP 06805675A EP 06805675 A EP06805675 A EP 06805675A EP 1928747 B1 EP1928747 B1 EP 1928747B1
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EP
European Patent Office
Prior art keywords
band
strapping
profile strip
spring element
helical spring
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Not-in-force
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EP06805675A
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German (de)
French (fr)
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EP1928747A1 (en
Inventor
Udo Reiche
Dieter Kopitz
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Maschinenfabrik Gerd Mosca AG
Cyklop GmbH
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Maschinenfabrik Gerd Mosca AG
Cyklop GmbH
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Publication of EP1928747A1 publication Critical patent/EP1928747A1/en
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    • 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
    • B65B13/00—Bundling articles
    • B65B13/02—Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes
    • B65B13/04—Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes with means for guiding the binding material around the articles prior to severing from supply
    • B65B13/06—Stationary ducts or channels

Definitions

  • the invention relates to a device for strapping packages, with a tape guide frame, which surrounds the package at a distance and the band channel on its side facing the package has a full length to open and automatically closing cover, which consists of moldings made of an elastic material which are fastened to the tape guide frame and have a side wall and an end wall which at least partially overlaps the side of the tape channel facing the package at a distance from the channel bottom, the profile strips being fastened to the tape guide frame beyond the free edges and from the bottom of the tape channel and at least in the Area of trained on the end wall band-contacting surfaces are provided with wear and / or sliding elements.
  • the invention is further directed to a profile strip, in particular for covering the band channel in the band guide frame a Packungsumreifungsvorraum, wherein the profile strip has a side wall and an end wall which are at an angle to each other and made of an elastic material with high bending fatigue strength in one piece and in the area at the End wall trained band contact surfaces is provided with wear and / or sliding elements.
  • Strapping devices for packages to be wrapped with a metal or plastic in particular band are known in various configurations.
  • hand-held devices there are stationary strapping machines in which the strapping band is first injected into the band guide frame surrounding the package to be strapped and then emerges from the band channel on its inner side facing the package during the manufacture of the strapping.
  • the band channel is covered by moldings that are flexible and thus the Channel can release at the inside facing the package when a tensile force is exerted in the interior of the tape guide frame enclosed space when lashing around the package on the strap lying in the belt channel.
  • the band channel is covered by angle-shaped metal strips short length, which are hinged to the two side walls of the band guide frame and pressed coil springs in a closing the band guide channel rest position, where they can tilt against the action of the coil springs to the outside when the strapping is contracted and tensioned against the package. Since the cover profile flaps are indeed resiliently mounted, but even rigid, they open and close under the inward train of the strapping not gradually but suddenly and along its entire length, whereby the leakage of the strapping from the band channel is uneven and with great noise.
  • the object of the invention is to provide a device for strapping packages as well as an insertable in this profile strip of the type mentioned, whereby the band channel of the strapping device can be covered substantially completely and below the inwardly directed train of the strapping this following uniformly opens and behind the well-worn tape reliably and quickly closes again, the profile strip has a long service life and still performs its function reliably after many Umreifungsvorêtn.
  • the wear and / or sliding elements consist of at least one embedded in the highly elastic material Metallspiralfederelement whose coil spring axis is substantially parallel to the band channel and whose turns a piece from the elastic material of the end wall in the band channel interior protrude and form substantially transversely to the band channel extending, curved sliding surfaces.
  • This embodiment provides a remarkable wear resistance of the profiled strip by means of the embedded Metallspiralfederelements, because the protruding from the elastic material of the end wall portions of their metallic turns, which of course have a significantly higher wear resistance than the elastic material in which they are embedded, form essentially the single contact surfaces with the enclosed in the band channel and radially inwardly out of the tape guide frame pulled out again strapping.
  • the Metallspiralfederelement also increases the ability of the profile strip, after the exit of the strap quickly penetrateverformen back to its original position and thereby close the band channel again, because the spring is when pulling the strap from the band channel by the resulting deformation of the Molded rail loaded in the respective opening area, so gets under tension and strives to take their original position as soon as possible again, of course, it also takes back the end wall of the profile strip, in which it is embedded in its closed position again.
  • an elastic material that itself does not have such a high recovery properties that a reclosure of the band channel would be guaranteed immediately after the emergence of the strapping can therefore be used in the invention, for example, if this due to the other material properties such as wear resistance u.
  • wear resistance u Like. Is desirable, because the required for the rapid resealing of the channel restoring force is yes ensured by the coil spring element.
  • the metal spiral spring element may be a compression or a tension spring and is preferably made of steel. It is expediently arranged on the free edge of the end wall, because there is the greatest exerted by the strapping on the profile strip load. A particularly advantageous embodiment results in that a plurality of metal spiral spring elements are arranged parallel next to one another in the band contact surfaces formed on the end wall.
  • a particularly suitable elastomer for the casting compound has been found to be a NDI-based polyurethane elastomer.
  • a polyurethane elastomer is characterized by very high dynamic load capacity, high wear resistance and high tear strength, can be used in a wide temperature range of - 40 ° C to + 80 ° C and also resistant to mineral oils and fats, gasoline and ozone.
  • the profiled strip according to the invention is thus preferably characterized in that it consists of an elastically hardening elastomeric casting compound and that the wear or sliding elements consist of at least one Metallspiralfederelement that is poured into the profile bar so that its turns a bit far from the hardened protrude elastic sealing compound on the end wall.
  • the arrangement is expediently made such that the individual turns of Metallspiralfederlements are at a distance from each other, so that they form a plurality of transverse to the band channel, curved sliding surfaces, between each of which forms a gap.
  • the spacing of the individual turns from each other can at least correspond to the wire diameter of the spring element, which thus results in spaces between the individual, parallel sliding surfaces whose width is at least as large as the diameter of the spring wire from which the metal spiral spring element consists.
  • the metal spiral spring element can be a steel compression or tension spring, wherein preferably the metal spiral spring element consists of a spring wire which has a particularly smooth, in particular a polished surface. This results in a particularly low coefficient of friction between the spring element and the strapping band ensuring that during the strapping in sliding contact with the turns of the spring element.
  • the strapping device designated in its entirety by 10 in the drawing serves for strapping a package 11 with a plastic strapping band 12.
  • the device 10 has a tape guide frame 13, which consists of two vertical posts 14 and 15, a top bar 16 and a tape guide tongue 17.
  • a roller conveyor 18 Under the tape guide frame 13 is a roller conveyor 18 on which the resting on a double pallet base 19 package 11 can be moved into the strapping, which is spanned by the tape guide frame 13.
  • a machine housing 20 is arranged with a Umreifungsagregat 21, which can drive in the direction of the arrow 22 from the machine housing against the package 11 and with which the strapping 12 is injected, tensioned, closed and cut off.
  • the tape guide tongue 17 is advanced from the machine housing 20 through the pallet bottom 19 to the vertical post 15 and the strapping 12 from the machine housing 20 in the tape guide frame 13 through the tape guide tongue 17, the post 15, the top bar 16 and the post 14th led around the package 11 and clamped in Umreifungsagregat 21.
  • the Umreifungsagregat 21 then moves with the clamped tape end in the direction of arrow 22 against the package 11 and pulls the subsequent clamping the strap from the band channel into the interior 26 of the tape guide frame 13, so that the strap 12 applies to the package.
  • the band guide tongue 17 is retracted and the pallet can extend with the strapped package 11 on the roller conveyor 18 from the strapping station 10.
  • the posts 14 and 15, the top bar 16 and the tape guide tongue 17 have tape guide rails 23 which are mounted on support bars 25 and on their the interior 26 of the tape guide frame 13 facing sides have a rectangular cross-section and the interior of the tape guide frame open towards recess 27 which forms the band channel 28.
  • This band channel is covered on its side facing the package 11 side by the end walls 29 of two profile strips 30 which are fixed to the side surfaces 31 of the tape guide rails 23 and 24 of the tape guide frame 13.
  • the profile strips 30 have a side wall 32 and an end wall 29 fixedly connected to this, which are arranged approximately at right angles to each other.
  • the integrally produced side and end walls of the profiled strip consist of an elastically hardening elastomer casting material, namely an NDI-based polyurethane elastomer.
  • the metal spiral spring elements 34 are compression springs or tension springs made of steel wire, preferably of polished steel wire, which has a particularly smooth surface and on which the strapping band 12 can slide along with very little resistance, without being damaged. Since the turns of the springs protrude a little way from the elastic support material of the profiled strip, it is ensured during the strapping process that the strapping band does not come in contact or at least not in any appreciable manner with the elastic material of the profiled strip and wears it. Rather, the metallic, transverse to the band channel, curved sliding surfaces of the spring winding portions 35, which protrude from the elastic material of the end wall, ensure that a contact occurs only between the strapping and the wear-resistant steel of the coil spring elements.

Abstract

The unit (10) for strapping a parcel (11) to a pallet (19) by means of a belt (12) incorporates belt guide channels at least partially covered by glide elements with helical screws embedded in an elastic material. An independent claim is also included for a profile strip with glide elements for at least partially covering belt guide channels in belt guide frames.

Description

Die Erfindung betrifft eine Vorrichtung zum Umreifen von Packstücken, mit einem Bandführungsrahmen, der das Packstück mit Abstand umgibt und dessen Bandkanal auf seiner dem Packstück zugewandten Seite eine auf ganzer Länge zu öffnende und sich selbsttätig schließende Abdeckung aufweist, welche aus Profilleisten aus einem elastischen Material besteht, die am Bandführungsrahmen befestigt sind und eine Seitenwand und eine Stirnwand aufweisen, welche die dem Packstück zugewandte Seite des Bandkanals im Abstand vom Kanalboden mindestens teilweise übergreift, wobei die Profilleisten jenseits von den freien Rändern und vom Boden des Bandkanals am Bandführungsrahmen befestigt sind und mindestens im Bereich der an der Stirnwand ausgebildete Bandberührungsflächen mit Verschleiß- und/oder Gleitelementen versehen sind. Die Erfindung ist ferner auf eine Profilleiste, insbesondere zum Abdecken des Bandkanals im Bandführungsrahmen einer Packstückumreifungsvorrichtung gerichtet, wobei die Profilleiste eine Seitenwand und eine Stirnwand aufweist, die in einem Winkel zueinander stehen und aus einem elastischen Material mit hoher Biegewechselfestigkeit einstückig gefertigt und im Bereich an der Stirnwand ausgebildeten Bandberührungsflächen mit Verschleiß- und/oder Gleitelementen versehen ist.The invention relates to a device for strapping packages, with a tape guide frame, which surrounds the package at a distance and the band channel on its side facing the package has a full length to open and automatically closing cover, which consists of moldings made of an elastic material which are fastened to the tape guide frame and have a side wall and an end wall which at least partially overlaps the side of the tape channel facing the package at a distance from the channel bottom, the profile strips being fastened to the tape guide frame beyond the free edges and from the bottom of the tape channel and at least in the Area of trained on the end wall band-contacting surfaces are provided with wear and / or sliding elements. The invention is further directed to a profile strip, in particular for covering the band channel in the band guide frame a Packungsumreifungsvorrichtung, wherein the profile strip has a side wall and an end wall which are at an angle to each other and made of an elastic material with high bending fatigue strength in one piece and in the area at the End wall trained band contact surfaces is provided with wear and / or sliding elements.

Umreifungsvorrichtungen für Packstücke, die mit einem Metall- oder insbesondere Kunststoffband umschlungen werden sollen, sind in verschiedenen Ausgestaltungen bekannt. Neben sogenannten Handgeräten gibt es stationäre Umreifungsmaschinen, bei denen das Umreifungsband zunächst in den das zu umreifende Packstück allseits umgebenden Bandkanal am Bandführungsrahmen eingeschossen wird und dann bei der Herstellung der Umreifung aus dem Bandkanal auf seiner dem Packstück zugewandten Innenseite austritt. Der Bandkanal wird dabei durch Profilleisten abgedeckt, die flexibel ausgestaltet sind und somit den Kanal an der dem Packstück zugewandten Innenseite freigeben können, wenn auf das im Bandkanal liegende Umreifungsband beim Festzurren um das Packstück eine Zugkraft in das Innere vom Bandführungsrahmen umschlossenen Raumes ausgeübt wird.Strapping devices for packages to be wrapped with a metal or plastic in particular band are known in various configurations. In addition to so-called hand-held devices, there are stationary strapping machines in which the strapping band is first injected into the band guide frame surrounding the package to be strapped and then emerges from the band channel on its inner side facing the package during the manufacture of the strapping. The band channel is covered by moldings that are flexible and thus the Channel can release at the inside facing the package when a tensile force is exerted in the interior of the tape guide frame enclosed space when lashing around the package on the strap lying in the belt channel.

Bei den im Einsatz befindlichen Umreifungsvorrichtungen wird der Bandkanal durch winkelförmige Metallleisten kurzer Länge abgedeckt, die an den beiden Seitenwänden des Bandführungsrahmens gelenkig angeordnet sind und von Schraubenfedern in eine den Bandführungskanal verschließende Ruhestellung gedrückt gehalten werden, wobei sie entgegen der Wirkung der Schraubenfedern nach außen kippen können, wenn das Umreifungsband gegen das Packstück zusammengezogen und gespannt wird. Da die Abdeckprofilklappen zwar federnd gelagert, aber selbst starr sind, öffnen und schließen sie sich unter dem nach innen gerichteten Zug des Umreifungsbandes nicht allmählich sondern schlagartig und auf ihrer ganzen Länge, wodurch das Austreten des Umreifungsbandes aus dem Bandkanal ungleichmäßig und mit großer Geräuschentwicklung erfolgt. Da die Federspannung an den Lagern der einzelnen Klappen kaum gleichmäßig einzustellen ist, entwickeln die Abdeckklappen längs des Bandführungsrahmens unterschiedliche Schließkräfte und lassen das Umreifungsband beim Bandspannvorgang an unterschiedlichen, nicht vorherbestimmbaren Stellen des Bandführungsrahmens aus dem Kanal austreten. Ein Problem besteht auch häufig darin, dass die Seiten- und Stirnwände der Metallklappen an ihren Stoßstellen nicht in einer Flucht liegen, sondern dass dort stufenförmige Übergänge entstehen, an denen das in den Bandkanal eingeschossene Umreifungsband mit seiner vorderen Querkante anstoßen kann, was Störungen nach sich zieht.In the strapping devices in use, the band channel is covered by angle-shaped metal strips short length, which are hinged to the two side walls of the band guide frame and pressed coil springs in a closing the band guide channel rest position, where they can tilt against the action of the coil springs to the outside when the strapping is contracted and tensioned against the package. Since the cover profile flaps are indeed resiliently mounted, but even rigid, they open and close under the inward train of the strapping not gradually but suddenly and along its entire length, whereby the leakage of the strapping from the band channel is uneven and with great noise. Since the spring tension on the bearings of the individual flaps is difficult to set evenly, the cover flaps develop along the tape guide frame different closing forces and let the strap during tape tensioning at different, not predictable points of the tape guide frame exit from the channel. A common problem is that the side and end walls of the metal flaps are not in alignment at their joints, but that there step-shaped transitions occur at which the inserted into the band channel strapping can abut with its front transverse edge, causing interference after draws.

Um die vorstehend erläuterten Nachteile bei den bislang eingesetzten Umreifungsvorrichtungen zu vermeiden, ist mit der gattungsbildenden DE 199 12 940 A1 vorgeschlagen worden, die aus Metallleisten bestehenden Abdeckklappen durch eine Profilleiste aus einem elastischen Material zu ersetzen, die den Bandkanal an seiner Innenseite in jeweils einem Stück abdecken können, so dass keine Stoßstellen in der Abdeckung mehr vorhanden sind. Da die Profilleiste selbst elastisch ist, öffnet sie den Bandkanal jeweils nur unmittelbar in dem Bereich, in dem das Band bei dessen Zusammenziehen um das Packstück aus dem Bandkanal austreten muss und verschließt diesen unmittelbar dahinter wieder.To avoid the above-mentioned disadvantages of the strapping devices used so far, is with the generic DE 199 12 940 A1 has been proposed to replace existing metal strips cover by a profile strip of an elastic material that can cover the band channel on its inside in one piece, so that no joints in the cover are more available. Since the profile strip itself is elastic, it opens the band channel only immediately in the area, in which the band has to emerge from the band channel when it contracts around the package and closes it immediately behind it.

Die Umsetzung dieses aus der DE 199 12 940 bekannten, grundsätzlich hervorragenden Vorschlages in die Praxis hat sich als schwieriger als erwartet erwiesen. Das Umreifungsband, das beim Umreifungsvorgang aus dem Bandkanal radial nach innen gezogen wird, bewirkte einen hohen Verschleiß der Profilleisten an den an ihren Stirnwänden ausgebildeten wandberührungsflächen, so dass ohne dort vorgesehene Verschleiß- und/oder Gleitelemente, die aus einem besonders verschleißfesten Material bestehen, auch nur halbwegs akzeptable Standzeiten der Profilleiste nicht erreicht werden konnten. Die mit der DE 199 12 940 vorgeschlagenen Verschleiß- und Gleitelemente aus Polytetrafluorethylen (PTFE) oder einem Copolymer hierzu, die in Koextrusion mit dem Rest der Profilleiste hergestellt werden sollten, hatten den Nachteil, die Flexibilität der Profilleiste erheblich zu verringern, so dass ein unverzügliches Wiederverschließen des Bandkanals nach dem Austritt des Umreifungsbandes hiermit nicht erreichbar war.The implementation of this from the DE 199 12 940 known, basically outstanding proposal in practice has proved to be more difficult than expected. The strapping, which is drawn during the strapping process from the band channel radially inwardly, caused a high wear of the profile strips on the formed on their end walls wall-contacting surfaces, so that without there provided wear and / or sliding elements, which consist of a particularly wear-resistant material, also only halfway acceptable service life of the profile bar could not be achieved. The with the DE 199 12 940 proposed wear and sliding elements made of polytetrafluoroethylene (PTFE) or a copolymer thereof, which should be produced in coextrusion with the rest of the profile strip, had the disadvantage of significantly reducing the flexibility of the profile strip, so that an immediate resealing of the band channel after the exit of the Strapping tape hereby was not available.

Aufgabe der Erfindung ist es, eine Vorrichtung zum Umreifen von Packstücken sowie eine bei dieser einsetzbare Profilleiste der eingangs genannten Art zu schaffen, womit der Bandkanal der Umreifungsvorrichtung im wesentlichen lückenlos abgedeckt werden kann und sich unter dem nach innen gerichteten Zug des Umreifungsbandes diesem folgend gleichmäßig öffnet und hinter dem ausgetretenen Band zuverlässig und schnell wieder schließt, wobei die Profilleiste eine hohe Standzeit hat und ihre Funktion auch nach vielen Umreifungsvorgängen noch zuverlässig erfüllt.The object of the invention is to provide a device for strapping packages as well as an insertable in this profile strip of the type mentioned, whereby the band channel of the strapping device can be covered substantially completely and below the inwardly directed train of the strapping this following uniformly opens and behind the well-worn tape reliably and quickly closes again, the profile strip has a long service life and still performs its function reliably after many Umreifungsvorgängen.

Diese Aufgabe wird mit der erfindungsgemäßen Vorrichtung dadurch gelöst, dass die Verschleiß- und/oder Gleitelemente aus mindestens einem in dem hoch elastischen Material eingebetteten Metallspiralfederelement bestehen, dessen Schraubenfederachse im wesentlichen parallel zum Bandkanal verläuft und dessen Windungen ein Stück weit aus dem elastischen Material der Stirnwand in das Bandkanalinnere hineinragen und im wesentlichen quer zum Bandkanal verlaufende, gekrümmte Gleitflächen bilden.This object is achieved with the device according to the invention characterized in that the wear and / or sliding elements consist of at least one embedded in the highly elastic material Metallspiralfederelement whose coil spring axis is substantially parallel to the band channel and whose turns a piece from the elastic material of the end wall in the band channel interior protrude and form substantially transversely to the band channel extending, curved sliding surfaces.

Diese Ausgestaltung schafft eine bemerkenswerte Verschleißfestigkeit der Profilleiste mit Hilfe des eingebetteten Metallspiralfederelements, denn die aus dem elastischen Material der Stirnwand herausragenden Abschnitte ihrer metallischen Windungen, die natürlich eine erheblich höhere Verschleißfestigkeit haben als das elastische Material, in das sie eingebettet sind, bilden im wesentlichen die einzigen Berührungsflächen mit dem in dem Bandkanal eingeschlossenen und darin radial nach innen aus dem Bandführungsrahmen wieder heraus gezogene Umreifungsband. Darüber hinaus erhöht das Metallspiralfederelement auch die Fähigkeit der Profilleiste, sich nach dem Austritt des Umreifungsbandes schnell wieder in ihre ursprüngliche Lage zurückzuverformen und hierdurch den Bandkanal wieder zu verschließen, denn die Feder wird beim Herausziehen des Umreifungsbandes aus dem Bandkanal durch die sich dabei ergebende Verformung der Profilleiste im jeweiligen Öffnungsbereich belastet, gerät also unter eine Spannung und ist bestrebt, ihre ursprüngliche Lage schnellstmöglich wieder einzunehmen, wobei sie natürlich auch die Stirnwand der Profilleiste, in die sie eingebettet ist, in ihre Verschlusslage wieder mit zurücknimmt. Auch ein elastisches Material, dass selbst keine so hohen Rückstelleigenschaften aufweist, dass ein Wiederverschluss des Bandkanals unmittelbar nach dem Austreten des Umreifungsbandes gewährleistet wäre, kann daher bei der Erfindung zum Einsatz kommen, beispielsweise wenn dies aufgrund der sonstigen Materialeigenschaften wie verschleißfestigkeit u. dgl. wünschenswert ist, denn die für den schnellen Wiederverschluss des Kanals erforderliche Rückstellkraft wird ja durch das Spiralfederelement sichergestellt.This embodiment provides a remarkable wear resistance of the profiled strip by means of the embedded Metallspiralfederelements, because the protruding from the elastic material of the end wall portions of their metallic turns, which of course have a significantly higher wear resistance than the elastic material in which they are embedded, form essentially the single contact surfaces with the enclosed in the band channel and radially inwardly out of the tape guide frame pulled out again strapping. In addition, the Metallspiralfederelement also increases the ability of the profile strip, after the exit of the strap quickly zurückverformen back to its original position and thereby close the band channel again, because the spring is when pulling the strap from the band channel by the resulting deformation of the Molded rail loaded in the respective opening area, so gets under tension and strives to take their original position as soon as possible again, of course, it also takes back the end wall of the profile strip, in which it is embedded in its closed position again. Also, an elastic material that itself does not have such a high recovery properties that a reclosure of the band channel would be guaranteed immediately after the emergence of the strapping, can therefore be used in the invention, for example, if this due to the other material properties such as wear resistance u. Like. Is desirable, because the required for the rapid resealing of the channel restoring force is yes ensured by the coil spring element.

Das Metallspiralfederelement kann eine Druck- oder eine Zugfeder sein und besteht vorzugsweise aus Stahl. Es ist zweckmäßig am freien Rand der Stirnwand angeordnet, denn dort ist die vom Umreifungsband auf die Profilleiste ausgeübte Belastung am größten. Eine besonders vorteilhafte Ausgestaltung ergibt sich, indem mehrere Metallspiralfederelemente parallel nebeneinander liegend in den an der Stirnwand ausgebildeten Bandberührungsflächen angeordnet sind.The metal spiral spring element may be a compression or a tension spring and is preferably made of steel. It is expediently arranged on the free edge of the end wall, because there is the greatest exerted by the strapping on the profile strip load. A particularly advantageous embodiment results in that a plurality of metal spiral spring elements are arranged parallel next to one another in the band contact surfaces formed on the end wall.

Besonders vorteilhaft ist es, wenn das elastische Material aus einer zu der elastischen Profilleiste aushärtenden Elastomer-Gussmasse besteht und wenn das Metallspiralfederelement in die Profilleiste eingegossen ist, wodurch eine sehr innige Verbindung zwischen dem Metall des Federelements und der aufnehmenden elastischen Profilleiste erreicht wird. Als besonders geeignet für die Elastomer-Gussmasse hat sich ein Polyurethan-Elastomer auf NDI-Basis erwiesen. Ein derartiges Polyurethan-Elastomer zeichnet sich durch sehr hohe dynamische Belastbarkeit, hohe Verschleißfestigkeit und hohe Weiterreißfestigkeit aus, ist in einem weiten Temperaturbereich von - 40°C bis + 80°C einsetzbar und auch gegenüber mineralischen Ölen und Fetten, Benzin und Ozon beständig.It when the elastic material consists of a curing of the elastic profile strip elastomeric molding compound and when the Metallspiralfederelement is poured into the profile strip, whereby a very intimate connection between the metal of the spring element and the female elastic profile strip is achieved is particularly advantageous. A particularly suitable elastomer for the casting compound has been found to be a NDI-based polyurethane elastomer. Such a polyurethane elastomer is characterized by very high dynamic load capacity, high wear resistance and high tear strength, can be used in a wide temperature range of - 40 ° C to + 80 ° C and also resistant to mineral oils and fats, gasoline and ozone.

Die erfindungsgemäße Profilleiste zeichnet sich also bevorzugt dadurch aus, dass sie aus einer elastisch aushärtenden Elastomer-Gussmasse besteht und dass die Verschleiß- oder Gleitelemente aus mindestens einem Metallspiralfederelement bestehen, das in die Profilleiste so eingegossen ist, dass seine Windungen ein Stück weit aus der ausgehärteten elastischen Vergussmasse an der Stirnwand herausragen. Die Anordnung ist dabei zweckmäßig so getroffen, dass sich die einzelnen Windungen des Metallspiralfederlements in einem Abstand voneinander befinden, so dass sie eine Vielzahl von quer zum Bandkanal verlaufenden, gekrümmten Gleitflächen bilden, zwischen denen sich jeweils ein Zwischenraum ausbildet. Der Abstand der einzelnen Windungen voneinander kann dem Drahtdurchmesser des Federelements mindestens entsprechen, womit sich also Zwischenräume zwischen den einzelnen, parallel liegenden Gleitflächen ergeben, deren Breite mindestens so groß ist wie der Durchmesser des Federdrahts, aus dem das Metallspiralfederelement besteht.The profiled strip according to the invention is thus preferably characterized in that it consists of an elastically hardening elastomeric casting compound and that the wear or sliding elements consist of at least one Metallspiralfederelement that is poured into the profile bar so that its turns a bit far from the hardened protrude elastic sealing compound on the end wall. The arrangement is expediently made such that the individual turns of Metallspiralfederlements are at a distance from each other, so that they form a plurality of transverse to the band channel, curved sliding surfaces, between each of which forms a gap. The spacing of the individual turns from each other can at least correspond to the wire diameter of the spring element, which thus results in spaces between the individual, parallel sliding surfaces whose width is at least as large as the diameter of the spring wire from which the metal spiral spring element consists.

Bei dem Metallspiralfederelement kann es sich um eine Stahldruck- oder Zugfeder handeln, wobei vorzugsweise das Metallspiralfederelement aus einem Federdraht besteht, der eine besonders glatte, insbesondere eine polierte Oberfläche aufweist. Hierdurch wird ein besonders geringer Reibungsbeiwert zwischen dem Federelement und dem Umreifungsband sichergestellt, das während des Umreifungsbandes in gleitendem Kontakt mit den Windungen des Federelements ist.The metal spiral spring element can be a steel compression or tension spring, wherein preferably the metal spiral spring element consists of a spring wire which has a particularly smooth, in particular a polished surface. This results in a particularly low coefficient of friction between the spring element and the strapping band ensuring that during the strapping in sliding contact with the turns of the spring element.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung und der Zeichnung, worin eine bevorzugte Ausführungsform der Erfindung anhand eines Beispiels näher erläutert wird. Es zeigt:

Fig. 1
eine erfindungsgemäße Umreifungsvorrichtung in einer seitlichen Ansicht;
Fig. 2
eine Einzelheit II der Fig. 1 in vergrößertem Maßstab, die den Austritt des Umreifungsbandes aus dem Bandkanal zeigt;
Fig. 3
einen Teilquerschnitt durch den Gegenstand der Fig. 2;
Fig. 4
einen Querschnitt durch eine den Bandkanal abdeckende Profilleiste in vergrößertem Maßstab; und
Fig. 5
den Gegenstand der Fig. 4 im Teilschnitt der Linie V-V.
Further features and advantages of the invention will become apparent from the following description and the drawing, wherein a preferred embodiment of the invention is explained in more detail by way of example. It shows:
Fig. 1
a strapping device according to the invention in a side view;
Fig. 2
a detail II of Fig. 1 on an enlarged scale, showing the exit of the strap from the strap channel;
Fig. 3
a partial cross section through the subject of Fig. 2 ;
Fig. 4
a cross section through a band channel covering the profile strip in an enlarged scale; and
Fig. 5
the object of Fig. 4 in partial section of the line VV.

Die in der Zeichnung in ihrer Gesamtheit mit 10 bezeichnete Umreifungsvorrichtung dient zum Umreifen eines Packstückes 11 mit einem Umreifungsband 12 aus Kunststoff. In an sich bekannter Weise weist die Vorrichtung 10 einen Bandführungsrahmen 13 auf, der aus zwei vertikalen Pfosten 14 und 15, einem Oberriegel 16 und einer Bandführungszunge 17 besteht. Unter dem Bandführungsrahmen 13 befindet sich eine Rollenbahn 18, auf der das auf einem doppelten Palettenboden 19 ruhende Packstück 11 in die Umreifungsebene gefahren werden kann, die von dem Bandführungsrahmen 13 aufgespannt wird.The strapping device designated in its entirety by 10 in the drawing serves for strapping a package 11 with a plastic strapping band 12. In known manner, the device 10 has a tape guide frame 13, which consists of two vertical posts 14 and 15, a top bar 16 and a tape guide tongue 17. Under the tape guide frame 13 is a roller conveyor 18 on which the resting on a double pallet base 19 package 11 can be moved into the strapping, which is spanned by the tape guide frame 13.

Seitlich neben dem Bandführungsrahmen 13 ist ein Maschinengehäuse 20 mit einem Umreifungsagregat 21 angeordnet, das in Richtung des Pfeiles 22 aus dem Maschinengehäuse gegen das Packstück 11 fahren kann und mit dem das Umreifungsband 12 eingeschossen, gespannt, verschlossen und abgeschnitten wird.Laterally next to the tape guide frame 13, a machine housing 20 is arranged with a Umreifungsagregat 21, which can drive in the direction of the arrow 22 from the machine housing against the package 11 and with which the strapping 12 is injected, tensioned, closed and cut off.

Zum Herstellen einer Umreifung wird die Bandführungszunge 17 vom Maschinengehäuse 20 aus durch den Palettenboden 19 hindurch bis zum vertikalen Pfosten 15 vorgeschoben und das Umreifungsband 12 vom Maschinengehäuse 20 aus im Bandführungsrahmen 13 durch die Bandführungszunge 17, den Pfosten 15, den Oberriegel 16 und den Pfosten 14 um das Packstück 11 herumgeführt und im Umreifungsagregat 21 festgeklemmt. Das Umreifungsagregat 21 fährt dann mit dem eingeklemmten Bandende in Richtung des Pfeiles 22 gegen das Packstück 11 vor und zieht beim nachfolgenden Spannen das Umreifungsband aus dem Bandkanal ins Innere 26 des Bandführungsrahmens 13, so dass sich das Umreifungsband 12 an das Packstück anlegt. Nach dem vollständigen Spannen und Abschneiden des Umreifungsbandes 12 wird die Bandführungszunge 17 zurückgezogen und die Palette kann mit dem umreiften Packstück 11 auf der Rollenbahn 18 aus der Umreifungsstation 10 ausfahren.To produce a strapping, the tape guide tongue 17 is advanced from the machine housing 20 through the pallet bottom 19 to the vertical post 15 and the strapping 12 from the machine housing 20 in the tape guide frame 13 through the tape guide tongue 17, the post 15, the top bar 16 and the post 14th led around the package 11 and clamped in Umreifungsagregat 21. The Umreifungsagregat 21 then moves with the clamped tape end in the direction of arrow 22 against the package 11 and pulls the subsequent clamping the strap from the band channel into the interior 26 of the tape guide frame 13, so that the strap 12 applies to the package. After the complete straining and cutting of the strapping band 12, the band guide tongue 17 is retracted and the pallet can extend with the strapped package 11 on the roller conveyor 18 from the strapping station 10.

Die Pfosten 14 und 15, der Oberriegel 16 und die Bandführungszunge 17 haben Bandführungsleisten 23, die auf Tragleisten 25 befestigt sind und auf ihren dem Inneren 26 des Bandführungsrahmens 13 zugewandten Seiten eine im Querschnitt rechteckige und zum Inneren des Bandführungsrahmens hin offene Ausnehmung 27 aufweisen, die den Bandkanal 28 bildet. Dieser Bandkanal wird auf seiner dem Packstück 11 zugewandten Seite durch die Stirnwände 29 von zwei Profilleisten 30 abgedeckt, die an den Seitenflächen 31 der Bandführungsleisten 23 und 24 des Bandführungsrahmens 13 befestigt sind.The posts 14 and 15, the top bar 16 and the tape guide tongue 17 have tape guide rails 23 which are mounted on support bars 25 and on their the interior 26 of the tape guide frame 13 facing sides have a rectangular cross-section and the interior of the tape guide frame open towards recess 27 which forms the band channel 28. This band channel is covered on its side facing the package 11 side by the end walls 29 of two profile strips 30 which are fixed to the side surfaces 31 of the tape guide rails 23 and 24 of the tape guide frame 13.

Soweit bis hierher beschrieben entspricht die Umreifungsvorrichtung nach der Erfindung derjenigen, wie sie in der älteren DE 199 12 940 A1 dargestellt und beschrieben ist, auf deren Offenbarungsgehalt zur weiteren Erläuterung der Funktionsweise solcher Umreifungsvorrichtungen hiermit ausdrücklich Bezug genommen wird. Die erfindungsgemäße Vorrichtung unterscheidet sich von der vorbekannten Maschine im Wesentlichen in der Ausgestaltung der bei ihr zum Einsatz kommenden Profilleisten, die in den Fig. 3 bis 6 näher dargestellt sind.As far as described so far corresponds to the strapping device according to the invention of those as in the older DE 199 12 940 A1 is shown and described, the disclosure of which is hereby incorporated by reference for further explanation of the operation of such strapping devices. The device according to the invention differs from the previously known machine essentially in the design of the profile strips used in its use in the Fig. 3 to 6 are shown in more detail.

Die Profilleisten 30 weisen eine Seitenwand 32 und eine mit dieser fest verbundene Stirnwand 29 auf, die etwa rechtwinklig zueinander angeordnet sind. Die einstückig hergestellten Seiten- und Stirnwände der Profilleiste bestehen aus einer elastisch aushärtenden Elastomer-Gussmasse, nämlich einem Polyurethan-Elastomer auf NDI-Basis. An der Innenseite 33 der Stirnwand sind bei jeder Profilleiste vier nebeneinander in Längsrichtung des Bandkanals verlaufende Verschleiß- und Gleitelemente in Form von Metallspiralfedern 34 angeordnet, die bei der Herstellung der Profilleiste so in diese eingegossen sind, dass ihre Windungen ein Stück weit aus dem elastischen Material der Stirnwand in das Bandkanalinnere 28 hineinragen, so dass die aus dem Material der Stirnwand herausragenden Windungsteile 35 der Federn 34 im wesentlichen quer zum Bandkanal 28 verlaufende, gekrümmte Gleitflächen bilden.The profile strips 30 have a side wall 32 and an end wall 29 fixedly connected to this, which are arranged approximately at right angles to each other. The integrally produced side and end walls of the profiled strip consist of an elastically hardening elastomer casting material, namely an NDI-based polyurethane elastomer. On the inside 33 of the end wall four side by side extending in the longitudinal direction of the band channel wear and sliding elements in the form of metal coil springs 34 are arranged, which are poured in the production of the profile bar in this, that their turns a piece from the elastic material protrude the end wall in the band channel interior 28, so that the protruding from the material of the end wall winding portions 35 of the springs 34 substantially transverse to the band channel 28 extending, curved sliding surfaces.

Bei den Metallspiralfederelementen 34 handelt es sich um Druckfedern oder Zugfedern aus Stahldraht, vorzugsweise aus poliertem Stahldraht, der eine besonders glatte Oberfläche hat und an dem das Umreifungsband 12 mit sehr geringem Widerstand entlanggleiten kann, ohne dabei beschädigt zu werden. Da die Windungen der Federn ein Stück weit vom elastischen Trägermaterial der Profilleiste vorstehen, ist während des Umreifungsvorganges sichergestellt, dass das Umreifungsband nicht oder jedenfalls nicht in nennenswerter Weise in Kontakt mit dem elastischen Material der Profilleiste kommt und dieses verschleißt. Vielmehr sorgen die metallischen, quer zum Bandkanal verlaufenden, gekrümmten Gleitflächen der Federwindungsteile 35, die aus dem elastischen Material der Stirnwand herausragen, dafür, dass ein Berührungskontakt nur zwischen dem Umreifungsband und dem verschleißfesten Stahl der Spiralfederelemente stattfindet.The metal spiral spring elements 34 are compression springs or tension springs made of steel wire, preferably of polished steel wire, which has a particularly smooth surface and on which the strapping band 12 can slide along with very little resistance, without being damaged. Since the turns of the springs protrude a little way from the elastic support material of the profiled strip, it is ensured during the strapping process that the strapping band does not come in contact or at least not in any appreciable manner with the elastic material of the profiled strip and wears it. Rather, the metallic, transverse to the band channel, curved sliding surfaces of the spring winding portions 35, which protrude from the elastic material of the end wall, ensure that a contact occurs only between the strapping and the wear-resistant steel of the coil spring elements.

Wenn das Umreifungsband 12 aus dem Bandkanal 28 zum Umreifen des Packstückes in das Innere 26 des Bandführungsrahmens 13 gezogen wird, wie dies in den Figuren 2 und 3 dargestellt ist, werden die an den Bandführungsleisten 23 und 24 mittels Klemmleisten 36 befestigten Profilleisten ein Stück weit aufgebogen, sodass sich die Seitenwände 32 etwas von den Bandführungsleisten 23 und 24 abheben und die Stirnwände 29 von dem Umreifungsband ein Stück weit ins Innere 26 des Bandführungsrahmens verformt werden. Dabei werden auch die Metallspiralfederelemente 34 gedehnt und geraten unter Zugspannung, wobei die Verformung und demgemäß die auftretende Spannung bei dem in unmittelbarer Nähe der freien Kante 37 der Stirnwand befindlichem Federelement 34a am größten ist. Die aus diesen Spannungen resultierenden Rückstellkräfte der Federn bewirken, dass die Profilleisten unmittelbar nach dem Austritt des Umreifungsbandes 12 aus dem Bandkanal 28 wieder in ihre ursprüngliche, in Fig. 4 gezeigte Lage zurückkehren, in der sie den Bandkanal 28 innenseitig verschließen. Die Federelemente bewirken an der Profilleiste also eine Art Memory-Effekt, und zwar auch dann, wenn das elastische Material der Profilleiste nach längerem Gebrauch seine Elastizität (teilweise) eingebüßt hat, denn auch dann bleibt die Federwirkung der Spiralfederelemente aus Metall zuverlässig erhalten.When the strap 12 is pulled out of the strap channel 28 for strapping the package into the interior 26 of the strap guide frame 13, as shown in FIGS FIGS. 2 and 3 is shown, the attached to the tape guide rails 23 and 24 by means of terminal strips 36 Moldings are bent a bit far, so that the side walls 32 slightly above the tape guide rails 23 and 24 and the End walls 29 are deformed by the strapping a little way into the interior 26 of the tape guide frame. In this case, the metal spiral spring elements 34 are stretched and come under tension, the deformation and, accordingly, the occurring stress at the befindlichem in the immediate vicinity of the free edge 37 of the end wall spring element 34a is greatest. The restoring forces of the springs resulting from these stresses cause the profile strips immediately after the exit of the strapping band 12 from the band channel 28 back into their original, in Fig. 4 Return shown position in which they close the band channel 28 inside. The spring elements cause the profile strip so a kind of memory effect, even if the elastic material of the profile strip after prolonged use its elasticity (partially) has lost, because even then, the spring action of the spiral spring elements made of metal reliably.

Claims (12)

  1. Apparatus for strapping an article, with a band guiding frame, which surrounds the article with a distance, and the band channel of which comprises a cover on the side facing the article, which cover opens along its entire length and closes itself automatically, said cover consisting of profile strips of an elastic material which are secured to the band guiding frame and comprise a side wall and a front wall, which overlaps the side of the band channel facing the article at least partially, wherein the profile strips are secured at the band guiding frame beyond the free edges and from the base of the band channel and are provided with wear and/or sliding elements at least in the region of the band contact surfaces formed at the front wall, characterised in that the wear and/or sliding elements consist of at least one metal helical spring element (34) embedded in the elastic material, the axis of the helical spring running essentially parallel to the band channel (28), and the coils (35) of which project a little from the elastic material of the front wall (29) into the interior (26) of the band channel and form curved sliding surfaces running essentially transversely to the band channel (28).
  2. Apparatus according to claim 1, characterised in that the metal helical spring element (34) is a compression or an extension spring.
  3. Apparatus according to claim 1 or 2, characterised in that the metal helical spring element (34) consists of steel.
  4. Apparatus according to one of claims 1 to 3, characterised in that the metal helical spring element (34) is arranged at the free edge (37) of the front wall (29).
  5. Apparatus according to one of claims 1 to 4, characterised in that several metal helical spring elements (34) are arranged in the band contact surfaces (33) formed in the front wall (29) in a parallel manner.
  6. Apparatus according to one of claims 1 to 4, characterised in that the elastic material consists of an elastomer cast mass curing to the elastic profile strip, and that the metal helical spring element (34) is cast into the profile strip (30).
  7. Apparatus according to claim 6, characterised in that the elastomer casting mass is a polyurethane elastomer based on NDI.
  8. Profile strip, in particular for covering the band channel in the band guiding frame of an article strapping apparatus according to one of claims 1 to 7, wherein the profile strip comprises a side wall and a front wall, which are angled to one another and which are made in one piece of an elastic material with a high fatigue strength under reversed bending, and which is provided with wear and/or slide elements in the region of the band contact surfaces formed at the front wall, characterised in that it consists of an elastically curing elastomer cast mass and that the wear and/or sliding elements consist of at least one metal helical spring element (34) which is cast within the profile strip (30) in such a manner that its coils (35) project a little from the cured elastic cast compound at the front wall (29).
  9. Profile strip according to claim 8, characterised in that the individual coils (35) of the metal helical spring element (34) have a distance from one another.
  10. Profile strip according to claim 9, characterised in that the distance corresponds at least to the wire diameter of the spring element (34).
  11. Apparatus according to one of claims 8 to 10, characterised in that the metal helical spring element (34) is a steel compression or extension spring.
  12. Profile strip according to one of claims 8 to 11, characterised in that the metal helical spring element (34) consists of a spring wire with a particularly smooth, especially polished surface.
EP06805675A 2005-09-20 2006-09-08 Apparatus for strapping articles and profile strip, in particular for covering the band channel of the article-strapping apparatus Not-in-force EP1928747B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202005014864U DE202005014864U1 (en) 2005-09-20 2005-09-20 Unit for strapping a parcel to a pallet by means of a belt incorporates belt guide channels at least partially covered by glide elements with helical screws embedded in an elastic material
PCT/EP2006/008779 WO2007033775A1 (en) 2005-09-20 2006-09-08 Apparatus for strapping articles and profile strip, in particular for covering the band channel of the article-strapping apparatus

Publications (2)

Publication Number Publication Date
EP1928747A1 EP1928747A1 (en) 2008-06-11
EP1928747B1 true EP1928747B1 (en) 2009-10-14

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Application Number Title Priority Date Filing Date
EP06805675A Not-in-force EP1928747B1 (en) 2005-09-20 2006-09-08 Apparatus for strapping articles and profile strip, in particular for covering the band channel of the article-strapping apparatus

Country Status (11)

Country Link
US (1) US7637208B2 (en)
EP (1) EP1928747B1 (en)
CN (1) CN101267988A (en)
AT (1) ATE445535T1 (en)
AU (1) AU2006294138A1 (en)
BR (1) BRPI0616082A2 (en)
CA (1) CA2622875A1 (en)
DE (2) DE202005014864U1 (en)
RU (1) RU2008115456A (en)
WO (1) WO2007033775A1 (en)
ZA (1) ZA200802474B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007019605B4 (en) * 2007-04-24 2009-02-26 Cyklop Gmbh strapping
CN105151368B (en) * 2015-08-18 2018-06-15 温州瑞润机械有限公司 The flat encircling type baling press of full-automatic water

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3613557A (en) * 1970-08-06 1971-10-19 Interlake Inc Adjustable platen track
DE3203080C2 (en) * 1982-01-30 1985-06-13 Hoesch Ag, 4600 Dortmund Strapping channel
DE3814029A1 (en) 1987-05-02 1988-11-17 Hoesch Ag Band-guide device of a tie-round apparatus
DE19912940A1 (en) * 1999-03-23 2000-09-28 Cyklop Gmbh Device for strapping packages and profile strip, in particular for covering the band channel of the package strapping device
US6499525B1 (en) * 2001-06-27 2002-12-31 Chien-Fa Lai Tape support for an automatic wrapper

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ATE445535T1 (en) 2009-10-15
US20090266247A1 (en) 2009-10-29
US7637208B2 (en) 2009-12-29
DE502006005133D1 (en) 2009-11-26
CA2622875A1 (en) 2007-03-29
BRPI0616082A2 (en) 2011-06-07
EP1928747A1 (en) 2008-06-11
WO2007033775A1 (en) 2007-03-29
RU2008115456A (en) 2009-10-27
ZA200802474B (en) 2009-03-25
CN101267988A (en) 2008-09-17
AU2006294138A1 (en) 2007-03-29
DE202005014864U1 (en) 2005-11-17

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