EP0387530B1 - Device for deviating a flat continuous film web folded in a semi-tubular form along its longitudinal middle line - Google Patents

Device for deviating a flat continuous film web folded in a semi-tubular form along its longitudinal middle line Download PDF

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Publication number
EP0387530B1
EP0387530B1 EP19900102763 EP90102763A EP0387530B1 EP 0387530 B1 EP0387530 B1 EP 0387530B1 EP 19900102763 EP19900102763 EP 19900102763 EP 90102763 A EP90102763 A EP 90102763A EP 0387530 B1 EP0387530 B1 EP 0387530B1
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EP
European Patent Office
Prior art keywords
guide
rope
guide plate
film web
guide rails
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.)
Expired - Lifetime
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EP19900102763
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German (de)
French (fr)
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EP0387530A1 (en
Inventor
Hans Beck
Erhardt Glausch
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Beck Packautomaten GmbH and Co KG
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Beck Packautomaten GmbH and Co KG
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Publication of EP0387530A1 publication Critical patent/EP0387530A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/06Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/06Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
    • B65B2009/063Forming shoulders

Definitions

  • the invention relates to a device for deflecting a leading film web, which is folded flat along its longitudinal center line to form a half-tube, for wrapping leading packaged goods with two self-supporting, parallel, vertically and laterally adjustable guide rails and with self-supporting guide plates arranged underneath the guide rails are adjustable relative to each other and vertically relative to the guide rails.
  • a device of this type is described in EP-PS 68 141.
  • Critical areas in the deflection path of the film web are in the known device at the free ends of the guide rails and guide plates and between the free ends of a guide rail and the underlying guide plate. Since the film web is not supported between the ends of the guide rails and guideways, it tends to flutter between these ends and to get caught and tear.
  • a support for the leading film web in the area between the free ends of guide rails and underlying guide plates is difficult because these device parts are adjustable relative to each other in adaptation to different sizes of goods to be packed in the film web, so their free ends can not be connected to each other by rigid guide members.
  • each guide rail is connected to the free end of the underlying guide plate by a rope or the like flexible, elongated element that the rope slidably guided at the free end of each guide plate and substantially parallel to the plane of the guide plate is deflected, and that the end of the rope facing away from the free end of the guide rail is subjected to a force which holds the rope taut between the free ends of the guide rail and guide plate.
  • the distances between the free ends of the guide rail and guide plate can be changed as desired by the sliding guidance of the rope at the free end of each guide plate and the application of force to the rope.
  • a film web 1 is fed in the direction of arrow A from top to bottom.
  • the film web 1 is folded flat along its longitudinal center line 2 to form a half tube, which consists of a front film layer 3 and a rear film layer 4 and is open on its side opposite the longitudinal center line 2.
  • the film web 1 is guided over two upper, horizontally cantilevered guide rails 5, 6 and two horizontally arranged guide plates 7, 8, which are also cantilevered and are located underneath these rails.
  • the film web 1 folded into a half tube is opened so that the front film layer 3 is guided and deflected via the guide rail 6, the guide plate 8 and the rear film layer 4 via the guide rail 5 and the guide plate 7.
  • An oblique triangular surface 12 is formed between the film layers 3, 4, which expand like a roof, between the free ends 9, 10 of the guide rails 5, 6 and the point 11 where the film layers 3, 4 separate from the longitudinal center line 2. At the base line of this triangular surface 12 between the ends 9, 10, the film web 1 is deflected horizontally inwards.
  • a corresponding deflection takes place on the connecting lines between the free ends 9, 10 of the guide rails 5, 6 and the underlying free ends 13, 14 of the Guide plates 7, 8 and on obliquely mutually extending edges of the guide plates 7, 8 itself, so that finally from the film web 1 a leading in the direction of arrow B, tubular all-round closed envelope 15 results, which on its underside along a center line running in the forward direction 16 has an opening slot, which in turn is formed by the free edges of the front and rear film layers 3, 4 that converge there again.
  • the free edges mentioned are welded together along the line 16, so that now a self-contained film tube is formed, in which (in Fig. 1 from the left) over the free ends 9, 10, 13, 14 of the guide rails 5, 6 and guide plates 7, 8 certain opening items to be packaged can be inserted continuously.
  • the guide rails 5, 6 and guide plates 7, 8 can be adjusted vertically and horizontally relative to one another in a manner to be described.
  • rope 17 or 18 runs between the free ends 9, 13 or 10, 14.
  • the expression "rope” here generally means a flexible, elongated element, for example also a cable, a tape, one Wire or the like. It has been found that the tensioning of the ropes 17, 18 between the aforementioned ends of guide rails and guide plates results in reliable guiding and deflection of the film web 1 can be accomplished, and there is no longer any sticking or tearing of the film.
  • each cable 17, 18 facing away from the free end 9, 10 of the relevant guide rail is acted upon behind the guide plates 7, 8 (in a manner also to be described below) with a force which forces the cable 17, 18 between the free ends of the guide rail and Holds the guide plate taut, but allows the ropes 17, 18 to be lengthened or shortened in the area of these free ends if the distance between the guide rails and guide plates is changed.
  • FIG. 2 shows schematically in side view a device for carrying out the described deflection of the film web 1.
  • At least two adjacent, freely rotating or driven rollers 22 protrude from a machine frame 21, between which the supplied film web 1 folded into a half-tube is fed .
  • the film web 1 is unwound from a supply roll 23 and fed via several deflecting rollers in the manner shown in FIG. 4.
  • the line 22 shown in FIG. 1 is also determined by the rollers 22, at which the two layers 3, 4 of the film web separate in a roof-like manner in the manner shown in FIG. 4.
  • FIG. 2 also show the guide rails 5, 6 and guide plates 7, 8, which are supported on the machine frame 21 in a self-supporting manner, whereby, in contrast to FIG. 1, the guide plates 7, 8 have a smaller one from the guide rails 5, 6 lying above them Have a distance, so that there is an overall flatter, tubular envelope 15 which receives objects 24 to be packed (Fig. 4).
  • FIGS. 2, 3 and 4 Parts of the adjustment mechanism for the guide rails 5, 6 and guide plates 5, 8 are indicated in FIGS. 2, 3 and 4 in the form of joints, screw spindles and bearings.
  • This adjustment mechanism is known per se (EP-PS 68 141) and does not form part of the invention.
  • the cable 17, 18 shortens or lengthens in the area between the free ends of the guide rails and the guide plate, the shortening or lengthening being caused by the lowering or raising Weight 27 or 28 is balanced.
  • weights 27, 28 springs could also be provided which act on the relevant ends of the cables 17, 18 with the necessary force and keep them taut between the guide rail and the guide plate.

Description

Die Erfindung betrifft eine Vorrichtung zur Umlenkung einer vorlaufenden, entlang ihrer Längsmittellinie zu einem Halbschlauch flach gefalteten Folienbahn zur Umhüllung von vorlaufendem Verpackungsgut mit zwei freitragenden, parallel zueinander verlaufenden, vertikal und seitlich relativ zueinander verstellbaren Führungsschienen und mit unter den Führungsschienen freitragend angeordneten Führungsplatten, die seitlich relativ zueinander und vertikal relativ zu den Führungsschienen verstellbar sind.The invention relates to a device for deflecting a leading film web, which is folded flat along its longitudinal center line to form a half-tube, for wrapping leading packaged goods with two self-supporting, parallel, vertically and laterally adjustable guide rails and with self-supporting guide plates arranged underneath the guide rails are adjustable relative to each other and vertically relative to the guide rails.

Eine Vorrichtung dieser Art ist in der EP-PS 68 141 beschrieben. Kritische Bereiche im Umlenkweg der Folienbahn liegen bei der bekannten Vorrichtung an den freien Enden der Führungsschienen und Führungsplatten sowie jeweils zwischen den freien Enden einer Führungsschiene und der darunterliegenden Führungsplatte. Da die Folienbahn zwischen den Enden der Führungsschienen und Führungsbahnen nicht abgestützt ist, neigt sie zwischen diesen Enden zu einem flatternden Verlauf und zum Hängenbleiben und Einreißen. Eine Abstützung der vorlaufenden Folienbahn im Bereich zwischen den freien Enden von Führungsschienen und darunterliegenden Führungsplatten ist deswegen schwierig, weil diese Vorrichtungsteile in Anpassung an unterschiedliche Größen von in die Folienbahn zu verpackenden Gütern relativ zueinander verstellbar sind, ihre freien Enden also nicht durch starre Führungsglieder stationär untereinander verbunden werden können.A device of this type is described in EP-PS 68 141. Critical areas in the deflection path of the film web are in the known device at the free ends of the guide rails and guide plates and between the free ends of a guide rail and the underlying guide plate. Since the film web is not supported between the ends of the guide rails and guideways, it tends to flutter between these ends and to get caught and tear. A support for the leading film web in the area between the free ends of guide rails and underlying guide plates is difficult because these device parts are adjustable relative to each other in adaptation to different sizes of goods to be packed in the film web, so their free ends can not be connected to each other by rigid guide members.

Es ist Aufgabe der Erfindung, eine gattungsgemäße Vorrichtung so zu verbessern, daß unter Beibehaltung der Verstellbarkeit von Führungsschienen und Führungsplatten die Folienbahn auch zwischen den Enden dieser Vorrichtungsteile sicher geführt und an einem Hängenbleiben oder Einreißen gehindert ist.It is an object of the invention to improve a generic device so that while maintaining the adjustability of guide rails and guide plates, the film web is securely guided between the ends of these device parts and is prevented from getting caught or tearing.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß das freie Ende jeder Führungsschiene mit dem freien Ende der darunterliegenden Führungsplatte durch ein Seil oder dergleichen flexibles, langgestrecktes Element verbunden ist, daß das Seil am freien Ende jeder Führungsplatte verschieblich geführt und im wesentlichen parallel zur Ebene der Führungsplatte umgelenkt ist, und daß das dem freien Ende der Führungsschiene abgekehrte Ende des Seils mit einer Kraft beaufschlagt ist, die das Seil zwischen den freien Enden von Führungsschiene und Führungsplatte straff hält.The object is achieved in that the free end of each guide rail is connected to the free end of the underlying guide plate by a rope or the like flexible, elongated element that the rope slidably guided at the free end of each guide plate and substantially parallel to the plane of the guide plate is deflected, and that the end of the rope facing away from the free end of the guide rail is subjected to a force which holds the rope taut between the free ends of the guide rail and guide plate.

Durch die verschiebliche Führung des Seiles am freien Ende jeder Führungsplatte und die Beaufschlagung des Seiles mit einer Kraft können die Abstände zwischen den freien Enden von Führungsschiene und Führungsplatte beliebig verändert werden.The distances between the free ends of the guide rail and guide plate can be changed as desired by the sliding guidance of the rope at the free end of each guide plate and the application of force to the rope.

Die nachstehende Beschreibung einer bevorzugten Ausführungsform der Erfindung dient im Zusammenhang mit beiliegender Zeichnung der weiteren Erläuterung. Es zeigen:

  • Fig. 1 schematisch die Umlenkung einer halbschlauchförmig gefalteten Folienbahn zur schlauchförmigen Umhüllung von Verpackungsgut;
  • Fig. 2 eine schematische Seitenansicht einer Umlenkvorrichtung;
  • Fig. 3 eine Draufsicht der Vorrichtung aus Fig. 2;
  • Fig. 4 eine schematische Frontansicht der Vorrichtung und
  • Fig. 5 eine Umlenkführung für ein Seil an einer Führungsplatte.
The following description of a preferred embodiment of the invention serves in conjunction with the accompanying drawings for further explanation. Show it:
  • 1 shows schematically the deflection of a semi-tubular folded film web for the tubular wrapping of packaged goods;
  • 2 shows a schematic side view of a deflection device;
  • Fig. 3 is a top view of the device of Fig. 2;
  • Fig. 4 is a schematic front view of the device and
  • Fig. 5 shows a deflection guide for a rope on a guide plate.

In Fig. 1 wird eine Folienbahn 1 in Richtung des Pfeiles A von oben nach unten vorlaufend zugeführt. Die Folienbahn 1 ist entlang ihrer Längsmittellinie 2 zu einem Halbschlauch flach gefaltet, der aus einer vorderen Folienlage 3 und einer hinteren Folienlage 4 besteht und an seiner der Längsmittellinie 2 gegenüberliegenden Seite offen ist. Die Folienbahn 1 wird über zwei obere, horizontal freitragend ortsfest gehaltene Führungsschienen 5, 6 sowie über zwei unter diesen Schienen liegende, ebenfalls freitragend ortsfest gehaltene, horizontal angeordnete Führungsplatten 7, 8 geführt. Dabei wird die zu einem Halbschlauch gefaltete Folienbahn 1 geöffnet, so daß die vordere Folienlage 3 über die Führungsschiene 6, die Führungsplatte 8 und die hintere Folienlage 4 über die Führungsschiene 5 und die Führungsplatte 7 geführt und umgelenkt werden. Zwischen den sich dachartig spreizenden Folienlagen 3, 4 bildet sich zwischen den freien Enden 9, 10 der Führungsschienen 5, 6 und der Stelle 11, wo sich die Folienlagen 3, 4 von der Längsmittellinie 2 trennen, eine schrägliegende Dreiecksfläche 12 aus. An der Basislinie dieser Dreiecksfläche 12 zwischen den Enden 9, 10 wird die Folienbahn 1 horizontal nach innen umgelenkt. Eine entsprechende Umlenkung erfolgt an den Verbindungslinien zwischen den freien Enden 9, 10 der Führungsschienen 5, 6 und der darunterliegenden freien Enden 13, 14 der Führungsplatten 7, 8 sowie an schräg zueinander verlaufenden Kanten der Führungsplatten 7, 8 selbst, so daß sich schließlich aus der Folienbahn 1 eine in Richtung des Pfeiles B vorlaufende, schlauchförmig ringsum geschlossene Umhüllung 15 ergibt, die an ihrer Unterseite längs einer in Vorlaufrichtung verlaufenden Mittellinie 16 einen Öffnungsschlitz aufweist, der seinerseits von den dort wieder zusammengelaufenen, freien Kanten der vorderen und hinteren Folienlage 3, 4 gebildet ist. Die genannten freien Kanten werden entlang der Linie 16 miteinander verschweißt, so daß nunmehr ein in sich ringsum geschlossener Folienschlauch entstanden ist, in welchen (in Fig. 1 von links her) über die von den freien Enden 9, 10, 13, 14 der Führungsschienen 5, 6 und Führungsplatten 7, 8 bestimmten Öffnung zu verpackende Gegenstände fortlaufend eingeführt werden können.In Fig. 1, a film web 1 is fed in the direction of arrow A from top to bottom. The film web 1 is folded flat along its longitudinal center line 2 to form a half tube, which consists of a front film layer 3 and a rear film layer 4 and is open on its side opposite the longitudinal center line 2. The film web 1 is guided over two upper, horizontally cantilevered guide rails 5, 6 and two horizontally arranged guide plates 7, 8, which are also cantilevered and are located underneath these rails. The film web 1 folded into a half tube is opened so that the front film layer 3 is guided and deflected via the guide rail 6, the guide plate 8 and the rear film layer 4 via the guide rail 5 and the guide plate 7. An oblique triangular surface 12 is formed between the film layers 3, 4, which expand like a roof, between the free ends 9, 10 of the guide rails 5, 6 and the point 11 where the film layers 3, 4 separate from the longitudinal center line 2. At the base line of this triangular surface 12 between the ends 9, 10, the film web 1 is deflected horizontally inwards. A corresponding deflection takes place on the connecting lines between the free ends 9, 10 of the guide rails 5, 6 and the underlying free ends 13, 14 of the Guide plates 7, 8 and on obliquely mutually extending edges of the guide plates 7, 8 itself, so that finally from the film web 1 a leading in the direction of arrow B, tubular all-round closed envelope 15 results, which on its underside along a center line running in the forward direction 16 has an opening slot, which in turn is formed by the free edges of the front and rear film layers 3, 4 that converge there again. The free edges mentioned are welded together along the line 16, so that now a self-contained film tube is formed, in which (in Fig. 1 from the left) over the free ends 9, 10, 13, 14 of the guide rails 5, 6 and guide plates 7, 8 certain opening items to be packaged can be inserted continuously.

Um die Größe der schlauchförmigen Umhüllung 15 an die Größe der zu verpackenden Güter anpassen zu können, sind die Führungsschienen 5, 6 und Führungsplatten 7, 8 in noch zu beschreibender Weise relativ zueinander vertikal und horizontal verstellbar.In order to be able to adapt the size of the tubular casing 15 to the size of the goods to be packed, the guide rails 5, 6 and guide plates 7, 8 can be adjusted vertically and horizontally relative to one another in a manner to be described.

Wie dargestellt, wird die Folienbahn 1 zwischen den untereinander liegenden Enden 9, 13 und 10, 14 der Führungsschienen bzw. Führungsplatten 5, 7 und 6, 8 frei geführt und um etwa 180° umgelenkt, was leicht zu einem Flattern und Einreißen der Folie in diesen Bereichen führen kann. Um hier Abhilfe zu schaffen, verläuft zwischen den freien Enden 9, 13 bzw. 10, 14 ein Seil 17 bzw. 18. Der Ausdruck "Seil" bedeutet hier generell ein flexibles, langgestrecktes Element, also beispielsweise auch ein Kabel, ein Band, einen Draht oder dergleichen. Es wurde gefunden, daß sich durch die Ausspannung der Seile 17, 18 zwischen den genannten Enden von Führungsschienen und Führungsplatten eine sichere Führung und Umlenkung der Folienbahn 1 bewerkstelligen läßt, und es dabei nicht mehr zu einem Hängenbleiben oder Zerreißen der Folie kommt.As shown, the film web 1 is freely guided between the mutually lying ends 9, 13 and 10, 14 of the guide rails or guide plates 5, 7 and 6, 8 and deflected by approximately 180 °, which easily causes the film to flutter and tear can lead to these areas. In order to remedy this, a rope 17 or 18 runs between the free ends 9, 13 or 10, 14. The expression "rope" here generally means a flexible, elongated element, for example also a cable, a tape, one Wire or the like. It has been found that the tensioning of the ropes 17, 18 between the aforementioned ends of guide rails and guide plates results in reliable guiding and deflection of the film web 1 can be accomplished, and there is no longer any sticking or tearing of the film.

Um trotz der Anordnung der Seile 17, 18 oder dergleichen die Verstellbarkeit der Führungsschienen 5, 6 und Führungsplatten 7, 8 aufrechtzuerhalten, sind diese Seile 17, 18 lediglich mit ihren einen Enden fest mit den Enden 9, 10 der Führungsschienen 5 bzw. 6 verbunden. An den Enden 13, 14 der Führungsplatten 7 bzw. 8 sind sie in noch zu beschreibender Weise verschieblich geführt und im wesentlichen parallel zur Ebene der Führungsplatten 7, 8 umgelenkt. Das dem freien Ende 9, 10 der betreffenden Führungsschiene abgekehrte Ende jedes Seils 17, 18 ist hinter den Führungsplatten 7, 8 (in ebenfalls noch zu beschreibender Weise) mit einer Kraft beaufschlagt, die das Seil 17, 18 zwischen den freien Enden von Führungsschiene und Führungsplatte straff hält, jedoch im Bereich dieser freien Enden eine Verlängerung oder Verkürzung der Seile 17, 18 ermöglicht, wenn der Abstand zwischen Führungsschienen und Führungsplatten verändert wird.In order to maintain the adjustability of the guide rails 5, 6 and guide plates 7, 8 despite the arrangement of the ropes 17, 18 or the like, these ropes 17, 18 are only firmly connected at one end to the ends 9, 10 of the guide rails 5 and 6, respectively . At the ends 13, 14 of the guide plates 7 and 8, they are displaceably guided in a manner to be described and deflected essentially parallel to the plane of the guide plates 7, 8. The end of each cable 17, 18 facing away from the free end 9, 10 of the relevant guide rail is acted upon behind the guide plates 7, 8 (in a manner also to be described below) with a force which forces the cable 17, 18 between the free ends of the guide rail and Holds the guide plate taut, but allows the ropes 17, 18 to be lengthened or shortened in the area of these free ends if the distance between the guide rails and guide plates is changed.

Die Fig. 2 zeigt schematisch in Seitenansicht eine Vorrichtung zur Durchführung der beschriebenen Umlenkung der Folienbahn 1. Von einem Maschinengestell 21 stehen freitragend wenigstens zwei nebeneinanderliegende, frei umlaufende oder angetriebene Walzen 22 ab, zwischen denen die zugeführte, zu einem Halbschlauch gefaltete Folienbahn 1 zugeführt wird. Die Folienbahn 1 wird von einer Vorratsrolle 23 abgewickelt und über mehrere Umlenkwalzen in der aus Fig. 4 ersichtlichen Weise zugeführt. Durch die Walzen 22 ist auch diejenige, aus Fig. 1 ersichtliche Linie bestimmt, an welcher sich die beiden Lagen 3, 4 der Folienbahn in der wiederum aus Fig. 4 ersichtlichen Weise dachartig trennen.2 shows schematically in side view a device for carrying out the described deflection of the film web 1. At least two adjacent, freely rotating or driven rollers 22 protrude from a machine frame 21, between which the supplied film web 1 folded into a half-tube is fed . The film web 1 is unwound from a supply roll 23 and fed via several deflecting rollers in the manner shown in FIG. 4. The line 22 shown in FIG. 1 is also determined by the rollers 22, at which the two layers 3, 4 of the film web separate in a roof-like manner in the manner shown in FIG. 4.

Die Fig. 2, 3 und 4 zeigen weiterhin auch wiederum die am Maschinengestell 21 freitragend gelagerten Führungsschienen 5, 6 und Führungsplatten 7, 8, wobei im Gegensatz zu Fig. 1 die Führungsplatten 7, 8 von den jeweils darüberliegenden Führungsschienen 5, 6 einen kleineren Abstand haben, so daß sich eine insgesamt flachere, schlauchförmige Umhüllung 15 ergibt, welche zu verpackende Gegenstände 24 (Fig. 4) aufnimmt.2, 3 and 4 also show the guide rails 5, 6 and guide plates 7, 8, which are supported on the machine frame 21 in a self-supporting manner, whereby, in contrast to FIG. 1, the guide plates 7, 8 have a smaller one from the guide rails 5, 6 lying above them Have a distance, so that there is an overall flatter, tubular envelope 15 which receives objects 24 to be packed (Fig. 4).

Teile des Verstellmechanismus für die Führungsschienen 5, 6 und Führungsplatten 5, 8 sind in Fig. 2, 3 und 4 in Form von Gelenken, Schraubspindeln und Lagern angedeutet. Dieser Verstellmechanismus ist an sich bekannt (EP-PS 68 141) und bildet keinen Bestandteil der Erfindung.Parts of the adjustment mechanism for the guide rails 5, 6 and guide plates 5, 8 are indicated in FIGS. 2, 3 and 4 in the form of joints, screw spindles and bearings. This adjustment mechanism is known per se (EP-PS 68 141) and does not form part of the invention.

Wie aus Fig. 2, 3 und 4 ersichtlich, verlaufen die Seile 17, 18, ausgehend von den freien Enden 9, 10 der Führungsschienen 5, 6, wo sie fest verankert sind, frei zu den zugehörigen, darunterliegenden Führungsplatten 7, 8, wo sie verschieblich geführt und umgelenkt werden, um anschließend an der Unterseite der Führungsplatten 7, 8 weiter zu verlaufen, bis zu einer weiteren Umlenkstelle 25 bzw. 26, wo die Seile 17, 18 nach unten geführt sind. An den nach unten gerichteten Enden der Seile 17, 18 sind Gewichte 27 bzw. 28 befestigt. Die Umlenkung an den Stellen 25, 26 erfolgt vorzugsweise mit Hilfe von freilaufenden Umlenkrollen.2, 3 and 4, the ropes 17, 18, starting from the free ends 9, 10 of the guide rails 5, 6, where they are firmly anchored, freely to the associated underlying guide plates 7, 8, where they are displaceably guided and deflected in order to then continue to run on the underside of the guide plates 7, 8, up to a further deflection point 25 or 26, where the cables 17, 18 are guided downwards. Weights 27 and 28 are fastened to the downward ends of the cables 17, 18. The deflection at points 25, 26 is preferably carried out with the aid of free-running deflection rollers.

Wenn der Abstand zwischen einer Führungsschiene 5, 6 und der darunterliegenden Führungsplatte 7, 8 verändert wird, verkürzt oder verlängert sich das Seil 17, 18 im Bereich zwischen den freien Enden von Führungsschienen und Führungsplatte, wobei die Verkürzung oder Verlängerung durch das sich absenkende oder anhebende Gewicht 27 bzw. 28 ausgeglichen wird.If the distance between a guide rail 5, 6 and the underlying guide plate 7, 8 is changed, the cable 17, 18 shortens or lengthens in the area between the free ends of the guide rails and the guide plate, the shortening or lengthening being caused by the lowering or raising Weight 27 or 28 is balanced.

Anstelle der Gewichte 27, 28 könnten auch Federn vorgesehen sein, welche die betreffenden Enden der Seile 17, 18 mit der nötigen Kraft beaufschlagen und zwischen Führungsschiene und Führungsplatte straff halten.Instead of the weights 27, 28, springs could also be provided which act on the relevant ends of the cables 17, 18 with the necessary force and keep them taut between the guide rail and the guide plate.

Es ist wichtig, daß an den Befestigungsstellen der Seile 17, 18 an den Führungsschienen 5, 6 und an den Umlenkstellen dieser Seile an den Enden 13, 14 der Führungsplatten 7, 8 keine scharfen Kanten oder Ecken entstehen, welche den Vorlauf der Folienbahn 1 behindern oder gar zu einem Hängenbleiben oder Zerreißen der Folie führen könnten. Die betreffenden Stellen müssen also möglichst glatt und reibungslos ausgebildet werden. In Fig. 5 ist die Umlenkung des Seiles 17 an der zugehörigen Führungsplatte 7 schematisch dargestellt. An der freien, leicht schräg verlaufenden Vorderkante der Führungsplatte 7 ist ein Rohr 29 befestigt, beispielsweise angeschweißt, welches entlang der Vorderkante der Führungsplatte 7 verläuft und alsdann an der Unterseite dieser Platte entlanggeführt ist. Von dem Rohr 29 wird das Seil 17 glatt und nahezu reibungslos geführt. Das freie Ende des Rohres 29 ist so geformt und an die Gestalt der Führungsplatte 7 angepaßt, daß der Vorlauf der Folienbahn 1 glatt und hindernislos erfolgen kann.It is important that at the fastening points of the cables 17, 18 on the guide rails 5, 6 and at the deflection points of these cables at the ends 13, 14 of the guide plates 7, 8 there are no sharp edges or corners which hinder the advance of the film web 1 or could even get caught or tear the film. The areas in question must therefore be designed to be as smooth and smooth as possible. 5, the deflection of the rope 17 on the associated guide plate 7 is shown schematically. On the free, slightly oblique front edge of the guide plate 7, a tube 29 is fastened, for example welded, which runs along the front edge of the guide plate 7 and is then guided along the underside of this plate. From the tube 29, the rope 17 is guided smoothly and almost smoothly. The free end of the tube 29 is shaped and adapted to the shape of the guide plate 7 so that the advance of the film web 1 can be smooth and unobstructed.

Claims (3)

  1. A device for changing the direction of a moving continuous thin sheet (1), which is folded along its middle line to form a flat half-tube, for enveloping moving goods to be packaged, comprising two cantilevered guide rails (5, 6), extending parallel to one another and adjustable vertically and laterally relative to one another, and cantilevered guide plates (7, 8) arranged below the guide rails which are adjustable laterally relative to one another and vertically relative to the guide rails, characterized in that the free end (9, 10) of each guide rail (5, 6) is connected to the free end (13, 14) of the guide plate (7, 8) located beneath it by means of a rope (17, 18) or similar flexible, elongate element, the rope (17, 18) is guided at the free end (13, 14) of each guide plate (7, 8) so that it is movable and is turned to be substantially parallel to the plane of the guide plate (7, 8), and the end of the rope (17, 18) furthest from the free end (9, 10) of the guide rail (5, 6) is loaded by a force (27, 28) which holds the rope (17, 78) taut between the free ends of the guide rail and the guide plate.
  2. A device according to claim 1, characterized in that the rope (17, 18) is loaded with a weight (27, 28).
  3. A device according to claim 1, characterized in that the direction of the rope (17, 18) is changed at the guide plate (7, 8) by means of a curved tube (29).
EP19900102763 1989-03-17 1990-02-13 Device for deviating a flat continuous film web folded in a semi-tubular form along its longitudinal middle line Expired - Lifetime EP0387530B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893908806 DE3908806C1 (en) 1989-03-17 1989-03-17
DE3908806 1989-03-17

Publications (2)

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EP0387530A1 EP0387530A1 (en) 1990-09-19
EP0387530B1 true EP0387530B1 (en) 1993-01-27

Family

ID=6376592

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Application Number Title Priority Date Filing Date
EP19900102763 Expired - Lifetime EP0387530B1 (en) 1989-03-17 1990-02-13 Device for deviating a flat continuous film web folded in a semi-tubular form along its longitudinal middle line

Country Status (4)

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EP (1) EP0387530B1 (en)
DE (2) DE3908806C1 (en)
DK (1) DK0387530T3 (en)
ES (1) ES2037483T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006007041B3 (en) * 2006-02-15 2007-08-09 Intersnack Knabber-Gebäck GmbH & Co. KG Rod-like spreading device used in a foil processing machine comprises a retaining element fixed to the front end of the device and to be fixed with one end to a foil processing machine
WO2020058532A1 (en) * 2018-09-21 2020-03-26 Formerfab Gmbh Synchronously adjustable tubular bag forming unit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495505A (en) * 1965-08-18 1970-02-17 Tetra Pak Ab Forming ring for guiding and shaping a web-like material into a tube
US3619970A (en) * 1969-11-25 1971-11-16 Weldotron Corp Automatic method and apparatus for the wrapping of articles
DE3152023A1 (en) * 1981-06-27 1983-01-13 Beck & Co Packautomaten, 7440 Nürtingen "DEVICE FOR DEFLECTING A CONTINUOUS FILM COATING IN A PACKING MACHINE"
US4576588A (en) * 1983-11-30 1986-03-18 Fuji Machinery Company, Ltd. Adjustable tube forming apparatus

Also Published As

Publication number Publication date
EP0387530A1 (en) 1990-09-19
DK0387530T3 (en) 1993-03-01
DE59000800D1 (en) 1993-03-11
ES2037483T3 (en) 1993-06-16
DE3908806C1 (en) 1990-06-21

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