EP1731427B1 - Method and device for strapping articles - Google Patents

Method and device for strapping articles Download PDF

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Publication number
EP1731427B1
EP1731427B1 EP06405247A EP06405247A EP1731427B1 EP 1731427 B1 EP1731427 B1 EP 1731427B1 EP 06405247 A EP06405247 A EP 06405247A EP 06405247 A EP06405247 A EP 06405247A EP 1731427 B1 EP1731427 B1 EP 1731427B1
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EP
European Patent Office
Prior art keywords
tape
channel
loop
strapping
curving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP06405247A
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German (de)
French (fr)
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EP1731427A1 (en
Inventor
Holger Müller
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Ferag AG
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Ferag AG
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Publication of EP1731427A1 publication Critical patent/EP1731427A1/en
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Classifications

    • 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
    • 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
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/185—Details of tools
    • B65B13/186—Supports or tables facilitating tensioning operations

Definitions

  • the invention relates to a method and a device according to the preambles of the corresponding independent claims.
  • Method and apparatus are used for strapping objects by means of a plastic tape.
  • the tape is pulled back in the opposite direction, whereby the tape loop is reduced and thereby pulled out of the tape channel and placed around the object and tightened.
  • the tightened loop is then closed by connecting the free end of the tape to another tape portion in the lead-in area by suitable means and separated from the further supplied tape, creating another, free end of the tape for the next strapping arises.
  • the early strapping devices were operated with a strapping material made of metal, for example with a metal band, wherein the strapping was closed by welding or by means of pressed-on clamps.
  • the strapping devices operate with relatively long cycle times, not only because closing the metal strapping is a time consuming step but also because the metal strapping material has considerable mass and rigidity and therefore can not be rapidly accelerated and bent around small radii, that is substantially must run directly from the supply roll to the lead-in area, so that for the tape feed and the tape retraction, the supply roll must be rotated.
  • the high inherent rigidity of the metal strapping material has the advantage that the band channel open, that is, in the region in which it rises from the support surface of the article, can be designed as a simple, open towards the object U-profile. Thanks to the inherent rigidity of the metal strapping material and thanks to the curved shape of the band channel, the free end of the strapping material, without being held in any way, runs along the channel bottom and the loop formed in the channel is pressed against this channel bottom by its resilient resistance against the bend. Strapping devices of the type mentioned are described for example in the publications US 1650843 or US 2707429 ,
  • plastic straps as strapping materials have been replaced wherever possible by plastic straps, in particular by structured ribbons of polypropylene having a thickness of usually 0.3 to 0.5 mm and a width of usually 5 to 8 mm.
  • the plastic tapes are not only less expensive than the metal strapping materials, but they are also lighter and, as the later development of the strapping devices shows, they also allow significant faster cycle times. This is on the one hand due to the fact that the strapping can be closed faster by welding, and on the other hand, that the plastic straps can be stored in an unordered state thanks to their significantly higher flexibility, so that for the feeding and retraction of the band no longer the relative large mass of the supply roll must be driven in rapid succession alternately in opposite directions.
  • the plastic tape does not have enough rigidity to be able to create a band loop in an open band channel.
  • the belt channel parts of the newer strapping devices that curve over the support surface have active or passive closure means, such that the belt channel is closed against the object to be strapped for the production of the belt loop and passively or through a suitable one for the withdrawal of the loop Drive is actively opened.
  • Strapping machines with which the above-mentioned plastic tape can be processed as strapping material with short cycle times, are described for example in the publications DE-4230730 . DE-3303956 or DE-4100276 ,
  • the invention now has the task of further driving the development briefly described above in the field of strapping devices, that is to provide a method and a device for strapping, which are based on the above briefly illustrated working principle and which are suitable for processing a Plastic band, in particular a band made of polypropylene.
  • Method and device according to the invention should allow the cycle time required per strapping in the Compared with known strapping again relevant to shorten. Nevertheless, the method and device should be easy to implement.
  • the strapping band is pre-bent, as far as possible immediately before insertion into the band channel (forward bending direction) against the bending direction in the band channel) and then pushed into a band channel, which is at least where the band loop is pulled out of the channel during the reduction, an open channel, which has no closing means.
  • the prebending radius is preferably smaller than the smallest bending radius of the band in the band channel.
  • the band is advantageously pulled around a pulley, the loop of this pulley advantageously being more than 180 ° and the looped pulley being part of the belt drive for inserting the band into the band channel, for example.
  • the strapping device thus has, in combination, an open band channel part and a prebending means.
  • the open band channel part is, for example, a channel which curves over a support surface for the object to be strapped and is open towards the object.
  • the Vorbiegesch is arranged as close to the insertion in the band channel and it is equipped for a band bending in a band bending in the band channel opposite direction.
  • the Vorbiegestoff is for example one of two mutually pressable drive rollers through which the tape is driven for insertion into the band channel.
  • the cycle time can be shortened by about 20% through the combination of the pre-bend and the open band channel according to the invention.
  • FIG. 1 shows an exemplary embodiment of the inventive strapping device.
  • This has, as known such strapping devices, the following, mounted in a frame, not shown major components: a support surface 1, are positioned on the objects to be strapped 2 successively, a band channel 3 with a first band channel part 3.1, which positioned on the strapping for Article 2 curves, and a second band channel part 3.2, which is a groove in the support surface 1 and passes under the object positioned for strapping through, a closing unit 4, which is equipped for holding the free end of the tape and for closing and separating the belt loop and is arranged in the region of the second band channel part 3.2, drive means 5 for the tape feed (insertion into the tape channel) and the tape retraction (reduction and tightening of the tape loop), a tape storage 6, in the supplied and withdrawn from the tape channel 3 band ready for further strapping being held, and a supply roll 7 from which the strapping tape is fed.
  • the strapping itself is denoted by 10, the feed direction of the belt 10 indicated by
  • the strapping device according to FIG. 1 differs from known devices which serve the same purpose, characterized in that the tape drive for the tape feed into the tape channel 3 although in a conventional manner two drive rollers 20 and 21, which are pressed against each other in a drive point 22 and between which the strapping 10 runs and but that is driven Band is guided in the feed direction behind the drive point 22 such that one of the drive rollers (20) is wrapped by the strapping 10, advantageously by more than 180 °. Furthermore, the strapping device shown differs from known devices in that the first band channel part 3.1, which curves over the contact surface 1, is an open channel, that is to say has a U-shaped cross-section which is open towards the inside and no closing means.
  • the first band channel part 3.1 is advantageously curved over its entire length, wherein its smallest radius of curvature is greater than the radius of the belt looped by the strapping drive roller 20, which corresponds to the Vorbiegeradius.
  • the support surface 1 is aligned tangentially to the first band channel part 3.1.
  • the drive means 5 in addition to the drive for the tape feed (drive rollers 20 and 21) and a drive for the retraction of the tape.
  • This consists essentially of the drive rollers 23 and 24, which serve as tape guide during the tape feed, that is, the strapping 10 lead such that it is pulled by the feed drive (drive rollers 20 and 21) to the drive roller 20 and thereby pre-bent before it gets into the drive point 22.
  • the rollers 20 and 21 are pressed against each other and at least one of them is driven, while the rollers 23 and 24 are not pressed against each other and rotate freely.
  • the rollers 23 and 24 are pressed against each other and at least one of them is driven, while the rollers 20 and 21 are not pressed against each other and rotate freely.
  • FIGS. 2 and 3 show cross sections through the band channel 3, FIG. 2 through the first band channel part 3.1 (section line II-II in Fig. 1) and Figure 3 through the second band channel part 3.2 (section line III-III in Fig. 1 ).
  • the first band channel part 3.1 has an open against the object to be strapped, U-shaped cross-section and it has no means with which it could be closed.
  • the strapping 10 is thus guided only laterally on its introduction into this band channel part but not held against the channel bottom 30.
  • the second band channel part 3.2 a cover 35 had.
  • This cover 35 is used in particular to the band channel part 3.2. cover when the object to be strapped is positioned for strapping and when this positioning is performed by pushing the object on the support surface. The cover 35 is removed at the latest before the removal of the strapped object from the band channel part 3.2. In particular, if the objects to be strapped are positioned in a different manner, the cover 35 may also be missing.
  • the two band channel parts 3.1 and 3.2 advantageously have the same width (slightly wider than the strapping band 10) and the same depth, which is advantageously about 5 to 10 mm for strapping bands 10 having a standard thickness.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Abstract

The method involves creating a tape loop in a tape channel (3) that is curved at an article (2) by inserting a tape (10). The loop is separated by the tape on a supply roller (7), where the tape is pre-curved in a direction, which is opposite to a bending direction of the tape in the loop. The tape is held and laterally guided against a channel base during provision of the loop in a tape channel part (3.1). An independent claim is also included for a device for strapping of articles with a plastic tape from a supply roller.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung nach den Oberbegriffen der entsprechenden, unabhängigen Patentansprüche. Verfahren und Vorrichtung dienen zum Umreifen von Gegenständen mit Hilfe eines Kunststoffbandes.The invention relates to a method and a device according to the preambles of the corresponding independent claims. Method and apparatus are used for strapping objects by means of a plastic tape.

Vorrichtungen zum mehr oder weniger automatischen Umreifen von Gegenständen mit einem beispielsweise bandförmigen Umreifungsmaterial sind seit etwa hundert Jahren bekannt. Viele dieser Vorrichtungen arbeiten nach dem gleichen, im Folgenden kurz beschriebenen Prinzip. Das Umreifungsband wird ab einer Vorratsrolle zugeführt. Für jede Umreifung wird das freie Ende des Umreifungsbandes zur Erstellung einer Bandschlaufe von einem Einführungsbereich her, der üblicherweise unter dem zu umreifenden Gegenstand angeordnet ist, in einen Bandkanal geschoben, der sich vom Gegenstand beabstandet rund um diesen erstreckt. Wenn das freie Bandende im Bandkanal bis wieder zum Einführungsbereich vorgeschoben ist, das heisst, wenn der Gegenstand von einer Bandschlaufe umfangen ist, wird das freie Bandende gehalten und der Bandvorschub wird gestoppt. Dann wird das Band in entgegengesetzter Richtung zurückgezogen, wobei die Bandschlaufe verkleinert wird und dadurch aus dem Bandkanal gezogen und um den Gegenstand gelegt und festgezogen wird. Die festgezogene Schlaufe wird dann durch Verbinden des freien Bandendes mit einem weiteren Bandbereich im Einführungsbereich mit geeigneten Mitteln geschlossen und vom weiter zugeführten Band abgetrennt, wodurch ein weiteres, freies Bandende für die nächste Umreifung entsteht.Devices for more or less automatic strapping of objects with a band-shaped strapping material, for example, have been known for about a hundred years. Many of these devices work according to the same principle briefly described below. The strapping is fed from a supply roll. For each strapping, the free end of the strapping band for creating a strap loop from an insertion area, which is usually located under the object to be strapped, is pushed into a band channel which extends from the object spaced around it. When the free end of the tape in the tape channel is advanced back to the lead-in area, that is, when the article is surrounded by a tape loop, the free end of the tape is held and the tape feed is stopped. Then, the tape is pulled back in the opposite direction, whereby the tape loop is reduced and thereby pulled out of the tape channel and placed around the object and tightened. The tightened loop is then closed by connecting the free end of the tape to another tape portion in the lead-in area by suitable means and separated from the further supplied tape, creating another, free end of the tape for the next strapping arises.

Die frühen Umreifungsvorrichtungen wurden mit einem Umreifungsmaterial aus Metall, z.B. mit einem Metallband, betrieben, wobei die Umreifungen durch Verschweissen oder mit Hilfe von aufgepressten Klammern geschlossen wurden. Die Umreifungsvorrichtungen arbeiteten mit relativ langen Zykluszeiten, nicht nur weil das Schliessen der metallenen Umreifung ein zeitaufwändiger Schritt ist sondern auch weil das metallene Umreifungsmaterial eine beträchtliche Masse und Steifigkeit aufweist und deshalb nicht schnell beschleunigt und nicht um kleine Radien gebogen werden kann, das heisst im wesentlichen direkt von der Vorratsrolle zum Einführungsbereich verlaufen muss, sodass für den Bandvorschub und den Bandrückzug die Vorratsrolle gedreht werden muss. Die hohe Eigensteifigkeit des metallenen Umreifungsmaterials bringt aber den Vorteil, dass der Bandkanal offen, das heisst in dem Bereich, in dem er sich aus der Auflagefläche des Gegenstands erhebt, als einfaches, gegen den Gegenstand offenes U-Profil ausgestaltet sein kann. Dank der Eigensteifigkeit des metallenen Umreifungsmaterials und dank der gebogenen Form des Bandkanals läuft das freie Ende des Umreifungsmaterials, ohne irgendwie gehalten zu werden, dem Kanalboden entlang und die im Kanal entstehende Schlaufe wird durch ihren federnden Widerstand gegen die Biegung gegen diesen Kanalboden gedrückt. Umreifungsvorrichtungen der genannten Art sind beispielsweise beschrieben in den Publikationen US-1650843 oder US-2707429 .The early strapping devices were operated with a strapping material made of metal, for example with a metal band, wherein the strapping was closed by welding or by means of pressed-on clamps. The strapping devices operate with relatively long cycle times, not only because closing the metal strapping is a time consuming step but also because the metal strapping material has considerable mass and rigidity and therefore can not be rapidly accelerated and bent around small radii, that is substantially must run directly from the supply roll to the lead-in area, so that for the tape feed and the tape retraction, the supply roll must be rotated. However, the high inherent rigidity of the metal strapping material has the advantage that the band channel open, that is, in the region in which it rises from the support surface of the article, can be designed as a simple, open towards the object U-profile. Thanks to the inherent rigidity of the metal strapping material and thanks to the curved shape of the band channel, the free end of the strapping material, without being held in any way, runs along the channel bottom and the loop formed in the channel is pressed against this channel bottom by its resilient resistance against the bend. Strapping devices of the type mentioned are described for example in the publications US 1650843 or US 2707429 ,

In der Zwischenzeit sind Metallbänder als Umreifungsmaterialien wo immer möglich durch Kunststoffbänder ersetzt worden, insbesondere durch strukturierte Bänder aus Polypropylen mit einer Dicke von üblicherweise 0,3 bis 0,5 mm und einer Breite von üblicherweise 5 bis 8 mm. Die Kunststoffbänder sind nicht nur kostengünstiger als die metallenen Umreifungsmaterialien, sondern sie sind auch leichter und sie erlauben, wie die spätere Entwicklung der Umreifungsvorrichtungen zeigt, auch bedeutend schnellere Zykluszeiten. Dies ist einerseits darauf zurückzuführen, dass die Umreifungen schneller durch Verschweissen geschlossen werden können, und andererseits darauf, dass die Kunststoffbänder dank ihrer bedeutend höheren Flexibilität in wenig geordnetem Zustand zwischengelagert werden können, so dass für das Zuführen und das Zurückziehen des Bandes nicht mehr die relativ grosse Masse der Vorratsrolle in schneller Abfolge abwechselnd in entgegengesetzten Richtungen angetrieben werden muss. Durch die genannten Unterschiede zwischen den beiden Typen von Umreifungsmaterialien und durch die dadurch mögliche Weiterentwicklung der Umreifungsvorrichtungen ist es möglich geworden, die Zykluszeit für die Umreifungen um mehr als eine Zehnerpotenz zu verkürzen. Dabei hat es sich aber gezeigt, dass das Kunststoffband keine genügende Steifigkeit aufweist, um daraus in einem offenen Bandkanal eine Bandschlaufe erstellen zu können. Aus diesem Grunde weisen die sich über die Auflagefläche krümmenden Bandkanalteile der neueren Umreifungsvorrichtungen aktive oder passive Schliessmittel auf, derart, dass der Bandkanal für die Erstellung der Bandschlaufe gegen den zu umreifenden Gegenstand geschlossen ist und für das Herausziehen der Schlaufe durch diese passiv oder durch einen geeigneten Antrieb aktiv geöffnet wird.In the meantime, metal straps as strapping materials have been replaced wherever possible by plastic straps, in particular by structured ribbons of polypropylene having a thickness of usually 0.3 to 0.5 mm and a width of usually 5 to 8 mm. The plastic tapes are not only less expensive than the metal strapping materials, but they are also lighter and, as the later development of the strapping devices shows, they also allow significant faster cycle times. This is on the one hand due to the fact that the strapping can be closed faster by welding, and on the other hand, that the plastic straps can be stored in an unordered state thanks to their significantly higher flexibility, so that for the feeding and retraction of the band no longer the relative large mass of the supply roll must be driven in rapid succession alternately in opposite directions. Due to the mentioned differences between the two types of strapping materials and the possible further development of the strapping devices, it has become possible to shorten the strapping cycle time by more than one order of magnitude. However, it has been shown that the plastic tape does not have enough rigidity to be able to create a band loop in an open band channel. For this reason, the belt channel parts of the newer strapping devices that curve over the support surface have active or passive closure means, such that the belt channel is closed against the object to be strapped for the production of the belt loop and passively or through a suitable one for the withdrawal of the loop Drive is actively opened.

Umreifungsmaschinen, mit denen das oben erwähnte Kunststoffband als Umreifungsmaterial mit kurzen Zykluszeiten verarbeitet werden kann, sind beispielsweise beschrieben in den Publikationen DE-4230730 , DE-3303956 oder DE-4100276 .Strapping machines, with which the above-mentioned plastic tape can be processed as strapping material with short cycle times, are described for example in the publications DE-4230730 . DE-3303956 or DE-4100276 ,

Die Erfindung stellt sich nun die Aufgabe, die oben kurz dargestellte Entwicklung im Bereich der Umreifungsvorrichtungen weiter zu treiben, das heisst, ein Verfahren und eine Vorrichtung zum Umreifen zu schaffen, die auf dem oben kurz dargestellten Arbeitsprinzip beruhen und die sich eignen für die Verarbeitung eines Kunststoffbandes, insbesondere eines Bandes aus Polypropylen. Verfahren und Vorrichtung gemäss Erfindung sollen es erlauben, die pro Umreifung benötigte Zykluszeit im Vergleich mit bekannten Umreifungsvorrichtungen nochmals relevant zu verkürzen. Trotzdem sollen Verfahren und Vorrichtung einfach realisierbar sein.The invention now has the task of further driving the development briefly described above in the field of strapping devices, that is to provide a method and a device for strapping, which are based on the above briefly illustrated working principle and which are suitable for processing a Plastic band, in particular a band made of polypropylene. Method and device according to the invention should allow the cycle time required per strapping in the Compared with known strapping again relevant to shorten. Nevertheless, the method and device should be easy to implement.

Diese Aufgabe wird gelöst durch das Verfahren und die Vorrichtung zum Umreifen, wie sie in den Patentansprüchen definiert sind.This object is achieved by the method and apparatus for strapping as defined in the claims.

Die Erfindung basiert auf den folgenden beiden Befunden:

  • Das Kunststoffband kann schneller aus dem Bandkanal gezogen und trotzdem in geordneter Weise um den zu umreifenden Gegenstand gelegt werden, wenn der Bandkanal für das Herausziehen der Bandschlaufe nicht geöffnet werden muss, sondern als offene Rinne ausgestaltet ist, das heisst wenn das Band während dem Herausziehen auf keinen Widerstand, insbesondere auf keinen unregelmässigen, die Schlaufenform verändernden Widerstand stösst, der es bremsen und insbesondere unregelmässig bremsen und dadurch in eine unstabile Form bringen könnte.
  • Das Kunststoffband kann ohne Probleme in einen als offene Rinne ausgestalten Bandkanal eingeschoben werden, also ohne im Kanal gehalten zu werden, wenn es unmittelbar vor dieser Einschiebung durch Biegen in einer der Bandbiegung im Bandkanal entgegengesetzten Richtung vorgespannt wird. Diese Vorspannung vermag das Band in einem offenen Bandkanal zu halten und der Bandschlaufe eine Stabilität zu geben, die für ein schnelles aber trotzdem geordnetes Anlegen an den zu umreifenden Gegenstand genügt.
The invention is based on the following two findings:
  • The plastic band can be pulled out of the band channel faster and still placed in an orderly manner to the object to be strapped when the band channel for pulling out the band loop does not need to be opened, but is designed as an open channel, that is, when the band during withdrawal on no resistance, in particular no irregular, the loop shape changing resistance pushes, which slow it and in particular irregular braking and thus could bring in an unstable shape.
  • The plastic tape can be inserted without problems in a configured as an open channel belt channel, so without being held in the channel when it is biased immediately before this insertion by bending in a band bending in the band channel opposite direction. This bias can hold the band in an open band channel and give the band loop a stability that is sufficient for a quick but still orderly application to the object to be strapped.

Nach dem erfindungsgemässen Verfahren wird also das Umreifungsband, möglichst unmittelbar vor dem Einschieben in den Bandkanal vorgebogen (Vorbiegerichtung entgegen der Biegerichtung im Bandkanal) und dann in einen Bandkanal geschoben, der mindestens da, wo die Bandschlaufe bei der Verkleinerung aus dem Kanal gezogen wird, eine offene Rinne ist, die keine Schliessmittel aufweist. Der Vorbiegeradius ist vorzugsweise kleiner als der kleinste Biegeradius des Bandes im Bandkanal. Für die Vorbiegung wird das Band vorteilhafterweise um eine Rolle gezogen, wobei die Umschlingung dieser Rolle vorteilhafterweise mehr als 180° beträgt und wobei die umschlungene Rolle beispielsweise Teil des Bandantriebs für das Einschieben des Bandes in den Bandkanal ist.According to the method according to the invention, therefore, the strapping band is pre-bent, as far as possible immediately before insertion into the band channel (forward bending direction) against the bending direction in the band channel) and then pushed into a band channel, which is at least where the band loop is pulled out of the channel during the reduction, an open channel, which has no closing means. The prebending radius is preferably smaller than the smallest bending radius of the band in the band channel. For pre-bending, the band is advantageously pulled around a pulley, the loop of this pulley advantageously being more than 180 ° and the looped pulley being part of the belt drive for inserting the band into the band channel, for example.

Die erfindungsgemässe Umreifungsvorrichtung weist also in Kombination einen offenen Bandkanalteil und ein Vorbiegemittel auf. Der offene Bandkanalteil ist beispielsweise eine sich über eine Auflagefläche für den zu umreifenden Gegenstand krümmende, gegen den Gegenstand offene Rinne. Das Vorbiegemittel ist möglichst unmittelbar vor der Einführstelle in den Bandkanal angeordnet und es ist für eine Bandbiegung ausgerüstet in einer der Bandbiegung im Bandkanal entgegengesetzten Richtung. Das Vorbiegemittel ist beispielsweise eine von zwei gegeneinander pressbaren Antriebsrollen durch die das Band für die Einschiebung in den Bandkanal angetrieben wird.The strapping device according to the invention thus has, in combination, an open band channel part and a prebending means. The open band channel part is, for example, a channel which curves over a support surface for the object to be strapped and is open towards the object. The Vorbiegemittel is arranged as close to the insertion in the band channel and it is equipped for a band bending in a band bending in the band channel opposite direction. The Vorbiegemittel is for example one of two mutually pressable drive rollers through which the tape is driven for insertion into the band channel.

Es zeigt sich, dass durch die erfindungsgemässe Kombination der Vorbiegung und dem offenen Bandkanal die Zykluszeit um ca. 20% verkürzt werden kann.It can be seen that the cycle time can be shortened by about 20% through the combination of the pre-bend and the open band channel according to the invention.

Verfahren und Vorrichtung gemäss Erfindung werden im Zusammenhang mit den folgenden Figuren im Detail beschrieben. Diese zeigen:

Figur 1
einen schematischen Schnitt durch eine beispielhafte Ausführungsform der erfindungsgemässen Umreifungsvorrichtung (Schnittebene etwa senkrecht und quer zur Richtung der Zu- und Wegförderung von nacheinander zu umreifenden Gegenständen);
Figuren 2 und 3
zwei Querschnitte durch den Bandkanal der erfindungsgemässen Umreifungsvorrichtung gemäss Figur 1 (Schnittlinien II-II und III-III in Fig. 1).
Method and apparatus according to the invention will be described in detail in connection with the following figures. These show:
FIG. 1
a schematic section through an exemplary embodiment of the inventive strapping device (sectional plane approximately perpendicular and transverse to the direction of the supply and removal of successively to be strapped objects);
FIGS. 2 and 3
two cross sections through the band channel of the inventive strapping according to FIG. 1 (Section lines II-II and III-III in FIG Fig. 1 ).

Figur 1 zeigt eine beispielhafte Ausführungsform der erfindungsgemässen Umreifungsvorrichtung. Diese weist, wie bekannte solche Umreifungsvorrichtungen die folgenden, in einem nicht dargestellten Gestell montierten Hauptbestandteile auf: eine Auflagefläche 1, auf der zu umreifende Gegenstände 2 nacheinander positioniert werden, einen Bandkanal 3 mit einem ersten Bandkanalteil 3.1, der sich über den für die Umreifung positionierten Gegenstand 2 krümmt, und einem zweiten Bandkanalteil 3.2, der eine Rinne in der Auflagefläche 1 ist und unter dem für die Umreifung positionierten Gegenstand hindurch läuft, eine Schliesseinheit 4, die für das Halten des freien Bandendes und für das Verschliessen und Abtrennen der Bandschlaufe ausgerüstet ist und im Bereich des zweiten Bandkanalteils 3.2 angeordnet ist, Antriebsmitttel 5 für den Bandvorschub (Einschieben in den Bandkanal) und den Bandrückzug (Verkleinerung und Festziehen der Bandschlaufe), einen Bandspeicher 6, in dem zugeführtes und aus dem Bandkanal 3 zurückgezogenes Band für weitere Umreifungen bereit gehalten wird, und eine Vorratsrolle 7 von der das Umreifungsband zugeführt wird. Das Umreifungsband selbst ist mit 10 bezeichnet, die Vorschubsrichtung des Bandes 10 mit Pfeilen B angedeutet. FIG. 1 shows an exemplary embodiment of the inventive strapping device. This has, as known such strapping devices, the following, mounted in a frame, not shown major components: a support surface 1, are positioned on the objects to be strapped 2 successively, a band channel 3 with a first band channel part 3.1, which positioned on the strapping for Article 2 curves, and a second band channel part 3.2, which is a groove in the support surface 1 and passes under the object positioned for strapping through, a closing unit 4, which is equipped for holding the free end of the tape and for closing and separating the belt loop and is arranged in the region of the second band channel part 3.2, drive means 5 for the tape feed (insertion into the tape channel) and the tape retraction (reduction and tightening of the tape loop), a tape storage 6, in the supplied and withdrawn from the tape channel 3 band ready for further strapping being held, and a supply roll 7 from which the strapping tape is fed. The strapping itself is denoted by 10, the feed direction of the belt 10 indicated by arrows B.

Die Umreifungsvorrichtung gemäss Figur 1 unterscheidet sich von bekannten Vorrichtungen, die demselben Zweck dienen, dadurch, dass der Bandantrieb für den Bandvorschub in den Bandkanal 3 zwar in üblicher Weise zwei Antriebsrollen 20 und 21 aufweist, die in einer Antriebstelle 22 gegeneinander gepresst werden und zwischen denen das Umreifungsband 10 verläuft und angetrieben wird, dass aber das Band in Vorschubrichtung hinter der Antriebstelle 22 derart geführt ist, dass die eine der Antriebsrollen (20) vom Umreifungsband 10 umschlungen wird, vorteilhafterweise um mehr als 180°. Ferner unterscheidet sich die dargestellte Umreifungsvorrichtung von bekannten Vorrichtungen dadurch, dass der sich über die Auflagefläche 1 krümmende, erste Bandkanalteil 3.1 eine offene Rinne ist, also einen gegen innen offenen, U-förmigen Querschnitt und keine Schliessmittel aufweist.The strapping device according to FIG. 1 differs from known devices which serve the same purpose, characterized in that the tape drive for the tape feed into the tape channel 3 although in a conventional manner two drive rollers 20 and 21, which are pressed against each other in a drive point 22 and between which the strapping 10 runs and but that is driven Band is guided in the feed direction behind the drive point 22 such that one of the drive rollers (20) is wrapped by the strapping 10, advantageously by more than 180 °. Furthermore, the strapping device shown differs from known devices in that the first band channel part 3.1, which curves over the contact surface 1, is an open channel, that is to say has a U-shaped cross-section which is open towards the inside and no closing means.

Der erste Bandkanalteil 3.1 ist vorteilhafterweise über seine ganze Länge gekrümmt, wobei sein kleinster Krümmungsradius grösser ist als der Radius der vom Umreifungsband umschlungenen Antriebsrolle 20, der dem Vorbiegeradius entspricht. An den Übergängen vom ersten zum zweiten Bandkanalteil ist die Auflagefläche 1 tangential zum ersten Bandkanalteil 3.1 ausgerichtet. Um die Länge und den Platzbedarf des ersten Bandkanalteils 3.1 möglichst klein zu halten und trotzdem diesen Bandkanalteil 3.1 möglichst gut an die Form der zu verpackenden Gegenstände anpassen zu können, ist es vorteilhaft, verschiedene Bereiche des ersten Bandkanalteils mit verschiedenen Krümmungsradien auszugestalten.The first band channel part 3.1 is advantageously curved over its entire length, wherein its smallest radius of curvature is greater than the radius of the belt looped by the strapping drive roller 20, which corresponds to the Vorbiegeradius. At the transitions from the first to the second band channel part, the support surface 1 is aligned tangentially to the first band channel part 3.1. In order to keep the length and space requirements of the first band channel part 3.1 as small as possible and still be able to adapt this band channel part 3.1 as well as possible to the shape of the objects to be packaged, it is advantageous to design different areas of the first band channel part with different radii of curvature.

Das Antriebsmittel 5 weist zusätzlich zum Antrieb für den Bandvorschub (Antriebsrollen 20 und 21) auch einen Antrieb für das Zurückziehen des Bandes auf. Dieser besteht im wesentlichen aus den Antriebsrollen 23 und 24, die während dem Bandvorschub als Bandführung dienen, das heisst, das Umreifungsband 10 derart führen, dass es durch den Vorschubantrieb (Antriebsrollen 20 und 21) um die Antriebsrolle 20 gezogen und dadurch vorgebogen wird, bevor es in die Antriebsstelle 22 gelangt. Während des Bandvorschubes (Richtung gemäss Pfeilen B) werden die Rollen 20 und 21 gegeneinander gepresst und mindestens eine davon wird angetrieben, während die Rollen 23 und 24 nicht gegeneinander gepresst werden und frei drehen. Während dem Zurückziehen des Bandes 10 werden die Rollen 23 und 24 gegeneinander gepresst und mindestens die eine davon wird angetrieben, während die Rollen 20 und 21 nicht gegeneinander gepresst werden und frei drehen.The drive means 5, in addition to the drive for the tape feed (drive rollers 20 and 21) and a drive for the retraction of the tape. This consists essentially of the drive rollers 23 and 24, which serve as tape guide during the tape feed, that is, the strapping 10 lead such that it is pulled by the feed drive (drive rollers 20 and 21) to the drive roller 20 and thereby pre-bent before it gets into the drive point 22. During the tape feed (direction according to arrows B), the rollers 20 and 21 are pressed against each other and at least one of them is driven, while the rollers 23 and 24 are not pressed against each other and rotate freely. During the retraction of the belt 10, the rollers 23 and 24 are pressed against each other and at least one of them is driven, while the rollers 20 and 21 are not pressed against each other and rotate freely.

Figuren 2 und 3 zeigen Querschnitte durch den Bandkanal 3, Figur 2 durch den ersten Bandkanalteil 3.1 (Schnittlinie II-II in Fig. 1) und Figur 3 durch den zweiten Bandkanalteil 3.2 (Schnittlinie III-III in Fig. 1). FIGS. 2 and 3 show cross sections through the band channel 3, FIG. 2 through the first band channel part 3.1 (section line II-II in Fig. 1) and Figure 3 through the second band channel part 3.2 (section line III-III in Fig. 1 ).

Wie aus Figur 2 ersichtlich ist, hat der erste Bandkanalteil 3.1 einen gegen den zu umreifenden Gegenstand offenen, U-förmigen Querschnitt und er weist keine Mittel auf, mit denen er verschlossen werden könnte. Das Umreifungsband 10 wird also bei seiner Einführung in diesen Bandkanalteil nur seitlich geführt aber nicht gegen den Kanalboden 30 gehalten.How out FIG. 2 it can be seen, the first band channel part 3.1 has an open against the object to be strapped, U-shaped cross-section and it has no means with which it could be closed. The strapping 10 is thus guided only laterally on its introduction into this band channel part but not held against the channel bottom 30.

Demgegenüber kann, wie in Figur 3 dargestellt, der zweite Bandkanalteil 3.2 eine Abdeckung 35 aufwiesen. Diese Abdeckung 35 dient insbesondere dazu, den Bandkanalteil 3.2. abzudecken, wenn der zu umreifende Gegenstand für die Umreifung positioniert wird und wenn diese Positionierung durch Schieben des Gegenstandes auf der Auflagefläche durchgeführt wird. Die Abdeckung 35 wird spätestens vor dem Wegfördern des umreiften Gegenstandes vom Bandkanalteil 3.2 entfernt. Insbesondere wenn die zu umreifenden Gegenstände auf andere Weise positioniert werden, kann die Abdeckung 35 auch fehlen.In contrast, as in FIG. 3 represented, the second band channel part 3.2 a cover 35 had. This cover 35 is used in particular to the band channel part 3.2. cover when the object to be strapped is positioned for strapping and when this positioning is performed by pushing the object on the support surface. The cover 35 is removed at the latest before the removal of the strapped object from the band channel part 3.2. In particular, if the objects to be strapped are positioned in a different manner, the cover 35 may also be missing.

Die beiden Bandkanalteile 3.1 und 3.2 weisen vorteilhafterweise die gleiche Breite (wenig breiter als das Umreifungsband 10) auf und die gleiche Tiefe, die für Umreifungsbänder 10 mit einer üblichen Dicke vorteilhafterweise etwa 5 bis 10 mm beträgt.The two band channel parts 3.1 and 3.2 advantageously have the same width (slightly wider than the strapping band 10) and the same depth, which is advantageously about 5 to 10 mm for strapping bands 10 having a standard thickness.

Claims (10)

  1. Method for strapping of objects (2) with a plastic tape (10) from a storage roll (7), wherein, in a tape channel (3) curved around an object to be strapped (2), a tape loop is formed by insertion of a free end of the tape (10), wherein the tape loop is reduced in size by retraction of the tape and thus moved out of at least one tape channel part (3.1) and placed around the object (2) and wherein the tape loop is then tensed around the object (2), closed and separated from the tape (10) on the storage roll (7), characterized in that the tape (10) is, for the insertion into the tape channel, driven and pre-curved in a direction opposed to the curving direction of the tape (10) in the tape loop and that the tape (10) is guided only laterally but not held towards a channel floor (30) during formation of the tape loop in the first tape channel part (3.1).
  2. Method according to claim 1, characterized in that a curve radius of the pre-curving is smaller than a smallest curve radius of the first tape channel part (3.1).
  3. Method according to claim 1 or 2, characterized in that the tape (10) is, for the insertion into the tape channel (3), driven by two driving rolls (20, 21) pressed against each other in a driving location (22) and that the tape (10) is pre-curved by looping one of the driving rolls (20) in a manner that it is pulled round the looping by the drive.
  4. Device for strapping of objects (2) with a plastic tape (10) from a storage roll (7), which device comprises a tape channel (3), which curves around an object (2) to be strapped, as well as a driving means (5) for insertion of a free end of the tape (10) into the tape channel (3) for forming of a tape loop and for retraction of the tape (10) for the reduction of size of the tape loop and the positioning and tightening of the tape loop around the object (2) and a means (4) for closing and cutting off the tape loop, characterized in that the device additionally comprises a means for pre-curving, which is arranged in the region of the driving means (5) and is equipped for the pre-curving of the tape (10), wherein the direction of the pre-curvature and the direction of a tape curvature in the tape channel (3) are opposed to each other and that a first tape channel part (3.1) of the tape channel (3), out of which the tape loop is drawn when being reduced in size, is a groove open towards the object (2) and comprises no means for holding the tape loop in the groove.
  5. Device according to claim 4, characterized in that the driving means (5) is equipped for a pre-curving around a pre-curving radius, wherein the pre-curving radius is smaller than a smallest radius of the tape channel (3).
  6. Device according to one of claims 4 or 5, characterized in that the driving means (5) for the insertion of the tape (10) comprises two drive rolls (20, 21) pressable against each other in a driving location (22) as well as tape guiding means through which the tape (10), being looped around one of the driving rolls (20), is guided towards the driving location (22).
  7. Device according to claim 6, characterized in that the looping amounts to at least 180°.
  8. Device according to one of claims 6 or 7, characterized in that the tape guiding means is equipped as drive for the retraction of the tape (10).
  9. Device according to one of claims 4 to 8, characterized in that a second tape channel part (3.2) is a groove in the support surface (1) for the object (2) to be strapped.
  10. Device according to claim 9, characterized in that the second tape channel part (3.2) comprises means for closing and reopening the groove.
EP06405247A 2005-06-09 2006-06-02 Method and device for strapping articles Not-in-force EP1731427B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH9832005 2005-06-09

Publications (2)

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EP1731427A1 EP1731427A1 (en) 2006-12-13
EP1731427B1 true EP1731427B1 (en) 2008-04-16

Family

ID=35033363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06405247A Not-in-force EP1731427B1 (en) 2005-06-09 2006-06-02 Method and device for strapping articles

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EP (1) EP1731427B1 (en)
AT (1) ATE392365T1 (en)
DE (1) DE502006000631D1 (en)
DK (1) DK1731427T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7798060B2 (en) * 2007-10-24 2010-09-21 Illinois Tool Works Inc. Modular strap dispenser with feed motor
CN112141392A (en) * 2020-09-17 2020-12-29 邯郸一三高研科技有限公司 Binding apparatus for metal wire production

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2206749A5 (en) * 1972-11-14 1974-06-07 Rhone Poulenc Sa
EP0524134B1 (en) * 1991-04-30 1996-12-27 B.V. Metaverpa Method and device for delivering a strapping tape
DE4443252A1 (en) * 1994-11-25 1996-05-30 Compac Banderolen Verpackung G Device for banding goods
JP2002370705A (en) * 2001-06-12 2002-12-24 Minoru Kakimoto Apparatus for correcting curl of resin band for use in automatic packing machine
JP3519705B2 (en) * 2001-07-06 2004-04-19 寛 畑谷 Tape tying machine

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DK1731427T3 (en) 2008-08-04
ATE392365T1 (en) 2008-05-15
EP1731427A1 (en) 2006-12-13
DE502006000631D1 (en) 2008-05-29

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