EP0035205B1 - Device for expanding the filling holes of bags connected together in a strip-like fashion - Google Patents

Device for expanding the filling holes of bags connected together in a strip-like fashion Download PDF

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Publication number
EP0035205B1
EP0035205B1 EP81101295A EP81101295A EP0035205B1 EP 0035205 B1 EP0035205 B1 EP 0035205B1 EP 81101295 A EP81101295 A EP 81101295A EP 81101295 A EP81101295 A EP 81101295A EP 0035205 B1 EP0035205 B1 EP 0035205B1
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EP
European Patent Office
Prior art keywords
bags
filling
roll
charging
opening
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
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EP81101295A
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German (de)
French (fr)
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EP0035205A1 (en
Inventor
Rudolf Douwenga
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Lockwood International BV
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Lockwood International BV
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Priority to AT81101295T priority Critical patent/ATE4791T1/en
Publication of EP0035205A1 publication Critical patent/EP0035205A1/en
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Publication of EP0035205B1 publication Critical patent/EP0035205B1/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
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/26—Opening or distending bags; Opening, erecting, or setting-up boxes, cartons, or carton blanks
    • B65B43/267—Opening of bags interconnected in a web

Definitions

  • the invention relates to a device for spreading the filling openings of bags of film material or the like connected to one another in a band-like manner, consisting of two transport belts, between which the bags are guided with their opening edges and which are each guided by at least one compensation roller that can be moved in the bag transport direction, and consisting of a between the opening edges engaging spreading arrangement, which comprises two flexible elements, each fixed at one end and movably mounted at the other end, which, together with the associated transport belts, grasp the opening edges of the respective bag and can be moved outwards by means of adjusting means.
  • the flexible expansion elements consist of link chains which are stretched outwards to form the filling opening on the respective bag.
  • the actuating means which tension the respective link chain outwards consists of a bracket provided with a pull rod which engages the chain approximately in the middle of the filling opening and pulls it outwards perpendicularly to the transport direction of the band-like bags.
  • an essentially oval filling opening can be formed, which enables the opening edges of the bags to be opened and closed uniformly without abrupt deflections.
  • this device permits a high transport speed of the bags and thus a high filling speed without fear of an inadmissible material loading of the bags.
  • the opening edges of the bags between the slats and the associated transport belts also run in without any major change in direction and therefore without any problems. The same applies to the leakage of the bag after it has been filled.
  • the hinge axes are arranged with respect to the lamellae in such a way that a sufficient lever arm is ensured which inevitably leads to the lamellae spreading apart. This is achieved in that the joints are arranged between the slats. This inevitably results in a sufficient lever arm between the respective hinge axis and the lamellae, so that when the hinge points approach each other, the lamellae reliably spread apart.
  • any preselectable tensioning force between the conveyor belts and the spreading lamellae can be set independently of the opening width.
  • the frictional force exerted on the opening edges of the bags can be kept at a desired low value when passing through the opening edges between the conveyor belts and the spreading lamellae, so that the bag material is subjected to little stress even at high transport speeds.
  • This device is also characterized by a simple structure and great operational reliability.
  • the opening and Closing movement of the slats can be achieved with extremely simple components.
  • the control of these components poses no problems.
  • the object of the invention is to develop the above-mentioned device in such a way that clogging of the filling opening is avoided with certainty.
  • a rotating part in particular as a roller, is arranged, which is rotatably mounted on an axis aligned essentially parallel to the conveying device of the filling material and is driven counter to the filling direction of the filling material.
  • this role is assigned to a filling shaft with a rigid filling opening.
  • the counter-driven roller ensures that the jam is loosened and the blockage is released so that a continuous filling process is ensured.
  • the roll on the filling material has a concave, rotationally symmetrical lateral surface, the contour of which is adapted to that of the filling opening and the filling shaft connected thereafter.
  • the contour of the roller can be aligned with the substantially vertical wall of the filling shaft located above the respective opening edge or, if necessary, protrude a little into the filling shaft.
  • a cover plate is arranged between the roller and the conveyor belt, which is attached on the one hand to the filling shaft and on the other hand partially overlaps the contour of the roller.
  • At least the surface of the roller can be made of rubber or plastic, or it can be equipped with bristles that are closely arranged.
  • the surface of the roller can also be designed to be uneven in such a way that the surface is provided with rotationally symmetrical circumferential grooves.
  • the device for spreading the filling opening of a longitudinally folded film strip divided into individual bags comprises a mounting frame 1, on which two parallel to each other and for the transport direction of the film strip are arranged guide devices 2, on which by means of a z. B. pneumatically acting actuator 4, a carriage 3 is displaceable.
  • the film strip is transported by means of two parallel conveyor belts 9 which capture and guide the opening edges of the film strip.
  • the transport belts 9 are driven or guided by means of correspondingly arranged pulleys which are mounted on the mounting frame 1 accordingly. While the pulleys 6 z. B. driven by an electric motor 5, the pulley pairs 7 and 8 run freely. Pulleys (not shown) can also be freely rotated on the carriage 3.
  • a spreading arrangement is provided, which is formed by two slats 11 arranged parallel to one another and to the transport direction of the film strip or the individual bags.
  • the slats 11 come to lie between the opening edges of the respective individual bag and clamp them in cooperation with the assigned transport belts 9.
  • the slats are hinged together at their two ends by means of joints 12 and 13. While the hinge 12 is arranged in a fixed position on the assembly frame 1, the hinge 13 is assigned to the slide 3 and moves with the slide 3.
  • the filling opening of the respective bag is spread apart in that the slide 3 and thus the hinge 13 in Transport direction of the film strip is shifted in the direction of the joint 12, whereby the slats 11 are spread apart.
  • the conveyor belts 9 make this movement due to an arrangement to be described in more detail. Due to the separation of the slats 11 and the transport belt 9, the opening edges of the bag, which are clamped between the components mentioned, are also moved apart, whereby the filling opening is formed on the bag. After filling, the filling opening of the bag is closed again by the slats 11 and together with them the transport belts 9 being moved towards one another again by the carriage 3 being moved back with the joint 13 being carried along. The filled and then closed again in the manner described is pulled off from the slats 11 by the transport belts 9 and the next bag to be filled is pushed onto the slats 11 with its opening edges.
  • the transport belts 9 can follow the described movements of the slats 11, they are guided around compensation rollers 10 which are mounted on a carrier 18 which can be displaced along the guide rods 2.
  • the synchronization of the movement of the displaceable carrier 18 with respect to the movement of the carriage 3 takes place by means of a lever 19 which in turn is rotatably connected to the mounting frame 1 and on the other hand interacts with the carriage 3 by means of two coupling rods 20 and 21.
  • the coupling rod 20 is articulated on a carrier of the slide 3 and the lever 19, the coupling rod 21 on the lever 19 and the carrier 18.
  • the points of engagement of the coupling rods 20 and 21 on the lever 19 are selected such that the transport belts are kept taut during the opening and closing movement of the plates 11.
  • the transport belts 9 are additionally guided in the area of the slats 11 by means of guide disks 15 which are mounted on arms 15a pivotably arranged on the mounting frame 1, which are under the action of springs 14 so that the guide rollers 15 are always pressed in the direction of the slats 11.
  • a spreading member 17 is provided on both the inlet side and the outlet side. While the inlet-side expansion member 17 widens in a wedge shape, the outlet-side expansion member 17 tapers accordingly in the transport direction. To further improve trouble-free running-in of the opening edges of the bags between the slats 11 and the associated transport belts 9, it is advisable to arrange a V-shaped strip 16 made of elastic material around the respective expansion element 17. This can also run between the slats 11 and the associated conveyor belt 9.
  • bags made of film material can be processed exactly, but also from other suitable materials, e.g. B. networks or the like.
  • FIG. 3 there is a roller 23 above one opening edge of the filling opening 24, which is rotatably mounted on an axis 25 which is aligned essentially parallel to the conveying direction of the film material.
  • the lateral surface of the rotationally symmetrical body has a concave generatrix 26, which is preferably adapted to the contour of the opening edge.
  • the generating line 26 is preferably aligned with the one opening edge of the extremely spread filling opening 24. However, the generating line 26 can also protrude a little into the filling opening.
  • the device shown in FIGS. 1 and 2 insofar as it relates to the filling area, is arranged under a filling shaft 27, the cross-sectional area of which is essentially adapted to the cross-section of the filling opening 24.
  • the roller 23 is shown in cross section, it being assumed that the roller is mounted with its axis in the walls of the filling shaft.
  • the roller 23 is partially hidden behind the wall 28 of the filling shaft, which has the contour of an opening edge of the filling opening.
  • a conveyor belt 29 is located diagonally above the roller 23 and runs over a deflection roller 30 shortly before the roller 23.
  • the conveyor run of the conveyor belt 29 moves in the direction of the filling shaft and conveys the material to be filled in.
  • the roller 23 moves according to the arrow C in the opposite direction, that is. H. against the filling direction of the product.
  • the conveyor belt 29 is followed by a cover plate 31, which lies closely above the roller and is adapted to the concave contour of the roller 23 with respect to its lower edge. This means that only the upper sector a of the roller 23 is exposed and can act on the filling material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Basic Packing Technique (AREA)
  • Package Closures (AREA)
  • Bag Frames (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

Apparatus for opening the filling openings of bags connected together in the manner of a band. The apparatus includes two conveyor belts between which the opening edges of the bags are guided and each of which is guided around at least one compensating roller displaceable in the direction of movement of the bags. A spreader arrangement engages between the opening edges of the bags and comprises two flexible elements each fixedly mounted at one end and displaceable at the other end, and which together with the associated conveyor belts grip the opening edges of the respective bag and are displaceable in an outward direction by adjuster means for the purpose of forming a filling opening. A rotary member is arranged above at least one of the opening edges of the filling opening substantially parallel to the direction of movement of the bag and is driven in opposition to the filling direction of the filling material.

Description

Die Erfindung betrifft eine Vorrichtung zum Aufspreizen der Füllöffnungen von miteinander bandartig verbundenen Beuteln aus Folienmaterial oder dergleichen, bestehend aus zwei Transportriemen, zwischen denen die Beutel mit ihren Öffnungsrändern geführt sind und die jeweils um mindestens eine in Beuteltransportrichtung bewegbare Kompensationsrolle geführt sind, und bestehend aus einer zwischen die Öffnungsränder eingreifenden Spreizanordnung, die zwei flexible, jeweils an einem Ende ortsfest und am anderen Ende beweglich gelagerte Elemente umfaßt, die gemeinsam mit den zugeordneten Transportriemen die Öffnungsränder des jeweiligen Beutels erfassen und mittels Stellmittel nach außen bewegbar sind.The invention relates to a device for spreading the filling openings of bags of film material or the like connected to one another in a band-like manner, consisting of two transport belts, between which the bags are guided with their opening edges and which are each guided by at least one compensation roller that can be moved in the bag transport direction, and consisting of a between the opening edges engaging spreading arrangement, which comprises two flexible elements, each fixed at one end and movably mounted at the other end, which, together with the associated transport belts, grasp the opening edges of the respective bag and can be moved outwards by means of adjusting means.

Bei einer bekannten Vorrichtung der vorausgesetzten Art (DE-B-20 47 774) bestehen die flexiblen Spreizelemente aus Gliederketten, die zur Bildung der Füllöffnung an dem jeweiligen Beutel nach außen gespannt werden. Das die jeweilige Gliederkette nach außen spannende Stellmittel besteht aus einem mit einer Zugstange versehenen Bügel, der in etwa in der Mitte der Einfüllöffnung an der Kette angreift und diese senkrecht zur Transportrichtung der bandartig verbundenen Beutel nach außen zieht. Diese Vorrichtung weist gewisse Nachteile auf. Da die flexiblen Spreizelemente durch Ketten gebildet werden, wird beim Spannen der Ketten nach außen eine rhombusartige Füllöffnung erzeugt. Aufgrund dieser rhombusartigen Füllöffnung ergeben sich an den Ecken des Rhombus starke Umlenkungen der Öffnungsränder der Beutel, die zu einer Beschädigung des Beutelmaterials führen können. Darüber hinaus beanspruchen die Kettenglieder ebenfalls das Beutelmaterial erheblich, und zwar selbst dann, wenn die Ketten mit umlaufenden Mitnehmerkörpern ausgerüstet sind. Diese Mitnehmerkörper führen zu dem weiteren Nachteil, daß die Ketten relativ kompliziert ausgebildet werden müssen und damit teuer sind. Die geschilderte Beanspruchung der Öffnungsränder der Beutel begrenzt ferner die Transportgeschwindigkeit der Beutel und damit die Verarbeitungsgeschwindigkeit der Vorrichtung. Bei der bekannten Vorrichtung werden die Kompensationsrollen für die Transportriemen mittels Federkraft gespannt. Je weiter deshalb die Spreizmittel und damit die Transportriemen beim Öffnen des jeweiligen Beutels auseinandergeführt werden, desto größer wird die von den gespannten Transportriemen auf die Spreizelemente ausgeübte Kraft, wodurch auf die zwischen den Transportriemen und den Spreizelementen hindurchlaufenden Öffnungsränder des jeweiligen Beutels eine erhebliche Reibungskraft ausgeübt wird. Diese Reibungskraft führt ebenfalls zu einer erheblichen Beanspruchung des Beutelmaterials, insbesondere bei hohen Transportgeschwindigkeiten.In a known device of the presupposed type (DE-B-20 47 774) the flexible expansion elements consist of link chains which are stretched outwards to form the filling opening on the respective bag. The actuating means which tension the respective link chain outwards consists of a bracket provided with a pull rod which engages the chain approximately in the middle of the filling opening and pulls it outwards perpendicularly to the transport direction of the band-like bags. This device has certain disadvantages. Since the flexible expansion elements are formed by chains, a rhombus-like filling opening is created when the chains are tensioned outwards. Due to this rhombus-like filling opening, there are strong deflections of the opening edges of the bags at the corners of the rhombus, which can lead to damage to the bag material. In addition, the chain links also stress the bag material considerably, even if the chains are equipped with revolving drive bodies. This driver body lead to the further disadvantage that the chains have to be made relatively complicated and are therefore expensive. The described stress on the opening edges of the bags further limits the speed of transport of the bags and thus the processing speed of the device. In the known device, the compensation rollers for the conveyor belts are tensioned by means of spring force. The further the spreading means and thus the conveyor belts are moved apart when the respective bag is opened, the greater the force exerted by the tensioned conveyor belts on the expansion elements, as a result of which a considerable frictional force is exerted on the opening edges of the respective bag passing between the conveyor belts and the expansion elements . This frictional force also leads to considerable stress on the bag material, especially at high transport speeds.

Eine vorteilhafte, bekannte Weiterentwicklung dieser Vorrichtung (DE-B-2 712 801) besteht darin, daß die flexiblen Elemente durch zwei im wesentlichen parallel zueinander angeordnete elastische Lamellen gebildet sind, die an ihren Enden durch zwischen den Lamellen liegende Gelenke miteinander verbunden sind, von denen das eine Gelenk ortsfest und das andere Gelenk auf einem in Richtung auf das erste Gelenk beweglichen Schlitten angeordnet ist, und daß die Kompensationsrollen sich auf einem zusammen mit dem Schlitten verschieblichen Träger befinden, der mittels eines Differentialgetriebes mit dem Schlitten verbunden ist.An advantageous, known further development of this device (DE-B-2 712 801) consists in the fact that the flexible elements are formed by two elastic slats arranged essentially parallel to one another, which are connected at their ends by joints lying between the slats, from which the one joint is fixed and the other joint is arranged on a carriage movable in the direction of the first joint, and that the compensation rollers are located on a carrier which can be moved together with the carriage and which is connected to the carriage by means of a differential gear.

Mittels dieser elastischen Lamellen läßt sich eine im wesentlichen ovale Füllöffnung bilden, die ein gleichmäßiges Öffnen und Schließen der Öffnungsränder der Beutel ohne abrupte Umlenkungen ermöglicht. Dadurch läßt diese Vorrichtung eine hohe Transportgeschwindigkeit der Beutel und damit eine große Füllgeschwindigkeit zu, ohne daß eine unzulässige Materialbeanspruchung der Beutel zu befürchten ist. Auch das Einlaufen der Öffnungsränder der Beutel zwischen den Lamellen und den zugehörigen Transportriemen erfolgt ohne starke Richtungsänderung und damit problemlos. Ein Gleiches gilt für das Auslaufen des Beutels nach dessen Füllung.By means of these elastic lamellae, an essentially oval filling opening can be formed, which enables the opening edges of the bags to be opened and closed uniformly without abrupt deflections. As a result, this device permits a high transport speed of the bags and thus a high filling speed without fear of an inadmissible material loading of the bags. The opening edges of the bags between the slats and the associated transport belts also run in without any major change in direction and therefore without any problems. The same applies to the leakage of the bag after it has been filled.

Die Gelenkachsen sind in bezug auf die Lamellen derart angeordnet, daß ein ausreichender Hebelarm gewährleistet ist, der zwangsweise zu einem Auseinanderspreizen der Lamellen führt. Dies ist dadurch erreicht, daß die Gelenke zwischen den Lamellen angeordnet sind. Damit ergibt sich zwangsläufig zwischen der jeweiligen Gelenkachse und den Lamellen ein ausreichender Hebelarm, so daß beim Annähern der Gelenkpunkte aneinander zuverlässig ein Auseinanderspreizen der Lamellen nach außen eintritt.The hinge axes are arranged with respect to the lamellae in such a way that a sufficient lever arm is ensured which inevitably leads to the lamellae spreading apart. This is achieved in that the joints are arranged between the slats. This inevitably results in a sufficient lever arm between the respective hinge axis and the lamellae, so that when the hinge points approach each other, the lamellae reliably spread apart.

Durch das Differentialgetriebe, über das die Kompensationsrollen der Transportriemen in Abhängigkeit von der Öffnungsbewegung der Spreizlamellen gesteuert werden, kann eine beliebig vorwählbare Spannkraft zwischen den Transportbändern und den Spreizlamellen unabhängig von der Öffnungsweite eingestellt werden. Dadurch kann die auf die Öffnungsränder der Beutel ausgeübte Reibungskraft beim Durchlaufen der Öffnungsränder zwischen den Transportbändern und den Spreizlamellen auf einem gewünschten niedrigen Wert gehalten werden, so daß eine geringe Beanspruchung des Beutelmaterials auch bei hohen Transportgeschwindigkeiten gegeben ist. Auch dies fb: .: zu einer hohen Betriebssicherheit der erfindungsgemäßen Vorrichtung bei hohen Transportgeschwindigkeiten.By means of the differential gear, by means of which the compensation rollers of the transport belts are controlled depending on the opening movement of the spreading lamellae, any preselectable tensioning force between the conveyor belts and the spreading lamellae can be set independently of the opening width. As a result, the frictional force exerted on the opening edges of the bags can be kept at a desired low value when passing through the opening edges between the conveyor belts and the spreading lamellae, so that the bag material is subjected to little stress even at high transport speeds. This also fb:.: To a high operational reliability of the device according to the invention at high transport speeds.

Diese Vorrichtung zeichnet sich darüber hinaus durch einen einfachen Aufbau und durch große Betriebssicherheit aus. Die Öffnungs- und Schließbewegung der Lamellen kann mit äußerst einfachen Bauteilen bewirkt werden. Die Steuerung dieser Bauteile ergibt keine Probleme.This device is also characterized by a simple structure and great operational reliability. The opening and Closing movement of the slats can be achieved with extremely simple components. The control of these components poses no problems.

Insgesamt ist eine Vorrichtung geschaffen, die sich durch hohe Transportgeschwindigkeit und damit Füllgeschwindigkeit und durch eine große Betriebssicherheit auszeichnet.Overall, a device has been created which is distinguished by high transport speed and thus filling speed and by great operational reliability.

Die vorgenannten Vorteile erfahren dadurch eine gewisse Einschränkung, daß eine Gefahr dahingehend nicht auszuschließen ist, daß sich die Einfüllöffnung verstopft und somit zur Erreichung der vorerwähnten Arbeitsgeschwindigkeit der Maschine ein einwandfreier Füllvorgang nicht gewährleistet ist.The above-mentioned advantages are subject to a certain restriction that a risk cannot be ruled out that the filler opening becomes blocked and that, in order to achieve the aforementioned working speed of the machine, a perfect filling process cannot be guaranteed.

Daher besteht die Aufgabe der Erfindung darin, die eingangs genannte Vorrichtung dahingehend weiterzubilden, daß ein Verstopfen der Füllöffnung mit Sicherheit vermieden wird.Therefore, the object of the invention is to develop the above-mentioned device in such a way that clogging of the filling opening is avoided with certainty.

Diese Aufgabe wird dadurch gelöst, daß oberhalb von mindestens einem der Öffnungsränder der Füllöffnung ein Drehteil, insbesondere als Rolle, angeordnet ist, das auf einer im wesentlichen parallel zur Fördervorrichtung des Füllgutes ausgerichteten Achse drehgelagert und entgegen der Einfüllrichtung des Füllgutes angetrieben ist.This object is achieved in that above at least one of the opening edges of the filling opening, a rotating part, in particular as a roller, is arranged, which is rotatably mounted on an axis aligned essentially parallel to the conveying device of the filling material and is driven counter to the filling direction of the filling material.

Im allgemeineren Sinne der Erfindung ist diese Rolle einem Einfüllschacht mit starrer Füllöffnung zugeordnet.In the more general sense of the invention, this role is assigned to a filling shaft with a rigid filling opening.

Falls die Füllöffnung verstopft, sorgt die gegenangetriebene Rolle dafür, daß der Stau aufgelockert und die Verstopfung aufgehoben wird, damit ein kontinuierlicher Einfüllvorgang gewährleistet ist.If the filling opening becomes blocked, the counter-driven roller ensures that the jam is loosened and the blockage is released so that a continuous filling process is ensured.

Diese Lösung erweist sich insbesondere dann als vorteilhaft, wenn oberhalb der Füllöffnung ein an deren Querschnitt angepaßter Füllschacht angeordnet ist, an den sich quer zur Förderrichtung des Folienmaterials ein Förderband anschließt, da in einem solchen Fall ein Verstopfen eher zu befürchten ist.This solution proves to be particularly advantageous if a filling shaft, which is adapted to its cross section, is arranged above the filling opening and is followed by a conveyor belt transversely to the conveying direction of the film material, since in such a case clogging is more likely to occur.

Hinsichtlich einer optimalen Anpassung und einer optimalen Einwirkung der Rolle auf das Füllgut weist diese eine konkave, rotationssymmetrische Mantelfläche auf, deren Kontur an die der Füllöffnung und des sich daran anschließenden Füllschachtes angepaßt ist.With regard to an optimal adaptation and an optimal action of the roll on the filling material, it has a concave, rotationally symmetrical lateral surface, the contour of which is adapted to that of the filling opening and the filling shaft connected thereafter.

Dabei kann die Kontur der Rolle mit der im wesentlichen senkrechten, über dem jeweiligen Öffnungsrand befindlichen Wand des Füllschachtes fluchten oder aber gegebenenfalls ein wenig in den Füllschacht hineinragen.The contour of the roller can be aligned with the substantially vertical wall of the filling shaft located above the respective opening edge or, if necessary, protrude a little into the filling shaft.

Zur Gewährleistung einer einwandfreien Funktion der Rolle und zur Verbesserung des Füllvorganges ist zwischen der Rolle und dem Förderband eine Abdeckplatte angeordnet, die einerseits an dem Füllschacht befestigt ist und andererseits unter Anpassung an die Kontur der Rolle diese teilweise überdeckt.To ensure proper functioning of the roller and to improve the filling process, a cover plate is arranged between the roller and the conveyor belt, which is attached on the one hand to the filling shaft and on the other hand partially overlaps the contour of the roller.

Um eine einerseits schonende, aber wirksame Berührung mit dem Füllgut zu gewährleisten, kann zumindest die Oberfläche der Rolle aus Gummi oder Kunststoff bestehen, oder aber mit dicht aneinandergereihten Borsten bestückt sein. Die Oberfläche der Rolle kann allerdings auch derart uneben gestaltet sein, daß die Oberfläche mit rotationssymmetrischen Umfangsrillen versehen ist.In order to ensure a gentle but effective contact with the filling material on the one hand, at least the surface of the roller can be made of rubber or plastic, or it can be equipped with bristles that are closely arranged. However, the surface of the roller can also be designed to be uneven in such a way that the surface is provided with rotationally symmetrical circumferential grooves.

Die Erfindung wird im folgenden anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels beschrieben.The invention is described below with reference to an embodiment shown in the drawings.

Es zeigt:

  • Fig. 1 eine schematische, teilweise geschnittene Draufsicht der erfindungsgemäßen Vorrichtung, ohne die Darstellung der erfindungsgemäßen Rolle,
  • Fig. 2 einen Längsschnitt durch die Vorrichtung gemäß der Schnittlinie 11-11 der Fig. 1,
  • Fig. 3 die wesentlichen Bauteile der Vorrichtung in der Stellung, in der der darin befindliche Beutel geöffnet ist, mit der Darstellung der erfindungsgemäßen Rolle,
  • Fig. 3a eine schematische Darstellung der Rolle und der Füllöffnung ohne die benachbarten Teile,
  • Fig.4 eine schematische Darstellung eines Füllschachtes und eines Förderbandes oberhalb der Füllöffnung, und
  • Fig. 5 eine Draufsicht auf die Anlage gemäß Fig. 4 in Richtung des Pfeiles A.
It shows:
  • 1 is a schematic, partially sectioned top view of the device according to the invention, without showing the role according to the invention,
  • 2 shows a longitudinal section through the device according to section line 11-11 of FIG. 1,
  • 3 shows the essential components of the device in the position in which the bag located therein is opened, with the representation of the roll according to the invention,
  • 3a is a schematic representation of the roller and the filling opening without the adjacent parts,
  • 4 shows a schematic representation of a filling shaft and a conveyor belt above the filling opening, and
  • 5 is a plan view of the system of FIG. 4 in the direction of arrow A.

Die Vorrichtung zum Aufspreizen der Füllöffnung eines in Einzelbeutel unterteilten, längsgefalteten Folienbandes umfaßt ein Montagegestell 1, auf dem zwei zueinander und zur Transportrichtung des Folienbandes parallele Führungseinrichtungen 2 angeordnet sind, auf denen mittels einer z. B. pneumatisch wirkenden Betätigungsvorrichtung 4 ein Schlitten 3 verschieblich ist. Der Transport des Folienbandes erfolgt mittels zwei parallel geführter Transportriemen 9, welche die Öffnungsränder des Folienbandes erfassen und führen. Der Antrieb bzw. die Führung der Transportriemen 9 erfolgt mittels entsprechend angeordneter Riemenscheiben, die am Montagegestell 1 entsprechend gelagert sind. Während die Riemenscheiben 6 z. B. mittels eines Elektromotors 5 angetrieben sind, laufen die Riemenscheibenpaare 7 und 8 frei mit. Auch am Schlitten 3 können nicht näher bezeichnete Riemenscheiben frei drehbar angeordnet sein.The device for spreading the filling opening of a longitudinally folded film strip divided into individual bags comprises a mounting frame 1, on which two parallel to each other and for the transport direction of the film strip are arranged guide devices 2, on which by means of a z. B. pneumatically acting actuator 4, a carriage 3 is displaceable. The film strip is transported by means of two parallel conveyor belts 9 which capture and guide the opening edges of the film strip. The transport belts 9 are driven or guided by means of correspondingly arranged pulleys which are mounted on the mounting frame 1 accordingly. While the pulleys 6 z. B. driven by an electric motor 5, the pulley pairs 7 and 8 run freely. Pulleys (not shown) can also be freely rotated on the carriage 3.

Zum Öffnen der Füllöffnungen der schrittweise transportierten Einzelbeutel ist eine Spreizanordnung vorgesehen, die durch zwei zueinander und zur Transportrichtung des Folienbandes bzw. der Einzelbeutel parallel angeordnete Lamellen 11 gebildet ist. Die Lamellen 11 kommen zwischen den Öffnungsrändern des jeweiligen Einzelbeutels zu liegen und klemmen diese im Zusammenwirken mit den zugeordneten Transportriemen 9 ein. Die Lamellen sind an ihren beiden Enden mittels Gelenken 12 und 13 scharnierartig miteinander verbunden. Während das Gelenk 12 ortsfest am Montagegestell 1 angeordnet ist, ist das Gelenk 13 dem Schlitten 3 zugeordnet und verschiebt sich mit dem Schlitten 3. Ein Aufspreizen der Füllöffnung des jeweiligen Beutels erfolgt dadurch, daß der Schlitten 3 und damit das Gelenk 13 in Transportrichtung des Folienbandes in Richtung auf das Gelenk 12 verschoben wird, wodurch die Lamellen 11 voneinander abgespreizt werden. Diese Bewegung machen die Transportriemen 9 aufgrund einer noch näher zu beschreibenden Anordnung mit. Durch das Auseinandergehen der Lamellen 11 und der Transportriemen 9 werden die Öffnungsränder des Beutels, die zwischen den genannten Bauteilen eingeklemmt sind, ebenfalls auseinanderbewegt, wodurch die Füllöffnung an dem Beutel ausgebildet wird. Nach erfolgter Füllung wird die Füllöffnung des Beutels wieder geschlossen, indem die Lamellen 11 und gemeinsam mit ihnen die Transportriemen 9 wieder aufeinander zu bewegt werden, indem der Schlitten 3 unter Mitnahme des Gelenkes 13 wieder zurückbewegt wird. Der gefüllte und auf die geschilderte Weise wieder geschlossene Beutel wird durch die Transportriemen 9 von den Lamellen 11 abgezogen und der nächste zu füllende Beutel mit seinen Öffnungsrändern auf die Lamellen 11 aufgeschoben.To open the filling openings of the incrementally transported individual bags, a spreading arrangement is provided, which is formed by two slats 11 arranged parallel to one another and to the transport direction of the film strip or the individual bags. The slats 11 come to lie between the opening edges of the respective individual bag and clamp them in cooperation with the assigned transport belts 9. The slats are hinged together at their two ends by means of joints 12 and 13. While the hinge 12 is arranged in a fixed position on the assembly frame 1, the hinge 13 is assigned to the slide 3 and moves with the slide 3. The filling opening of the respective bag is spread apart in that the slide 3 and thus the hinge 13 in Transport direction of the film strip is shifted in the direction of the joint 12, whereby the slats 11 are spread apart. The conveyor belts 9 make this movement due to an arrangement to be described in more detail. Due to the separation of the slats 11 and the transport belt 9, the opening edges of the bag, which are clamped between the components mentioned, are also moved apart, whereby the filling opening is formed on the bag. After filling, the filling opening of the bag is closed again by the slats 11 and together with them the transport belts 9 being moved towards one another again by the carriage 3 being moved back with the joint 13 being carried along. The filled and then closed again in the manner described is pulled off from the slats 11 by the transport belts 9 and the next bag to be filled is pushed onto the slats 11 with its opening edges.

Damit die Transportriemen 9 den geschilderten Bewegungen der Lamellen 11 folgen können, sind sie um Kompensationsrollen 10 geführt, die auf einem längs der Führungsstangen 2 verschiebbaren Träger 18 gelagert sind. Die Synchronisation der Bewegung des verschieblichen Trägers 18 in bezug auf die Bewegung des Schlittens 3 erfolgt mittels eines Hebels 19, der seinerseits mit dem Montagegestell 1 drehbar verbunden ist und andererseits mittels zweier Kupplungsstangen 20 und 21 mit dem Schlitten 3 zusammenwirkt. Dabei ist die Kupplungsstange 20 an einem Träger des Schlittens 3 und dem Hebel 19, die Kupplungsstange 21 am Hebel 19 und dem Träger 18 angelenkt. Die Angriffspunkte der Kupplungsstangen 20 und 21 auf den Hebel 19 sind derart gewählt, daß bei der sich öffnenden und schließenden Bewegung der Lamellen 11 die Transportriemen gerade gespannt gehalten werden.So that the transport belts 9 can follow the described movements of the slats 11, they are guided around compensation rollers 10 which are mounted on a carrier 18 which can be displaced along the guide rods 2. The synchronization of the movement of the displaceable carrier 18 with respect to the movement of the carriage 3 takes place by means of a lever 19 which in turn is rotatably connected to the mounting frame 1 and on the other hand interacts with the carriage 3 by means of two coupling rods 20 and 21. The coupling rod 20 is articulated on a carrier of the slide 3 and the lever 19, the coupling rod 21 on the lever 19 and the carrier 18. The points of engagement of the coupling rods 20 and 21 on the lever 19 are selected such that the transport belts are kept taut during the opening and closing movement of the plates 11.

Um im Bereich der Lamellen 11 eine exakte Führung der Transportriemen 9 trotz der hin- und hergehenden Bewegung zu erzielen, sind die Transportriemen 9 im Bereich der Lamellen 11 zusätzlich mittels Führungsscheiben 15 geführt, die auf an dem Montagegestell 1 schwenkbar angeordneten Armen 15a gelagert sind, die unter der Wirkung von Federn 14 stehen, so daß die Führungsrollen 15 stets in Richtung auf die Lamellen 11 gedrückt werden.In order to achieve exact guidance of the transport belts 9 in the area of the slats 11 despite the reciprocating movement, the transport belts 9 are additionally guided in the area of the slats 11 by means of guide disks 15 which are mounted on arms 15a pivotably arranged on the mounting frame 1, which are under the action of springs 14 so that the guide rollers 15 are always pressed in the direction of the slats 11.

Um ein exaktes und problemloses Einlaufen der Öffnungsränder der Beutel zwischen den Lamellen und den zugehörigen Transportriemen 9 zu erzielen, ist sowohl einlaufseitig als auch auslaufseitig je ein Spreizorgan 17 vorgesehen. Während sich das einlaufseitige Spreizorgan 17 keilförmig erweitert, verjüngt sich das auslaufseitige Spreizorgan 17 in Transportrichtung entsprechend. Zur weiteren Verbesserung eines störungsfreien Einlaufens der Öffnungsränder der Beutel zwischen den Lamellen 11 und den zugehörigen Transportriemen 9 empfiehlt es sich, um das jeweilige Spreizorgan 17 einen V-förmigen Streifen 16 aus elastischem Material anzuordnen. Dieser kann auch noch zusätzlich zwischen den Lamellen 11 und den zugeordneten Transportriemen 9 verlaufen.In order to achieve a precise and problem-free entry of the opening edges of the bags between the lamellae and the associated transport belts 9, a spreading member 17 is provided on both the inlet side and the outlet side. While the inlet-side expansion member 17 widens in a wedge shape, the outlet-side expansion member 17 tapers accordingly in the transport direction. To further improve trouble-free running-in of the opening edges of the bags between the slats 11 and the associated transport belts 9, it is advisable to arrange a V-shaped strip 16 made of elastic material around the respective expansion element 17. This can also run between the slats 11 and the associated conveyor belt 9.

Mit der beschriebenen Vorrichtung können nicht nur Beutel aus Folienmaterial exakt verarbeitet werden, sondern auch aus anderen geeigneten Materialien, z. B. Netze oder dergleichen.With the device described not only bags made of film material can be processed exactly, but also from other suitable materials, e.g. B. networks or the like.

Wie aus Fig. 3 deutlich ersichtlich ist, befindet sich oberhalb dem einen Öffnungsrand der Füllöffnung 24 eine Rolle 23, die auf einer Achse 25 drehgelagert ist, welche im wesentlichen parallel zur Förderrichtung des Folienmaterials ausgerichtet ist. Wie insbesondere aus Fig. 3 ersichtlich ist, hat die Mantelfläche des rotationssymmetrischen Körpers eine konkave Erzeugende 26, die bevorzugt an die Kontur des Öffnungsrandes angepaßt ist. Vorzugsweise fluchtet die Erzeugende 26 mit dem einen Öffnungsrand der extrem gespreizten Füllöffnung 24. Die Erzeugende 26 kann aber auch ein wenig in die Füllöffnung hineinragen.As can be clearly seen from FIG. 3, there is a roller 23 above one opening edge of the filling opening 24, which is rotatably mounted on an axis 25 which is aligned essentially parallel to the conveying direction of the film material. As can be seen in particular from FIG. 3, the lateral surface of the rotationally symmetrical body has a concave generatrix 26, which is preferably adapted to the contour of the opening edge. The generating line 26 is preferably aligned with the one opening edge of the extremely spread filling opening 24. However, the generating line 26 can also protrude a little into the filling opening.

In Fig. 4 ist die in Fig. 1 und 2 dargestellte Vorrichtung, soweit sie den Einfüllbereich betrifft, unter einem Füllschacht 27 angeordnet, dessen Querschnittsfläche im wesentlichen an den Querschnitt der Füllöffnung 24 angepaßt ist. In dieser Darstellung ist die Rolle 23 im Querschnitt dargestellt, wobei davon auszugehen ist, daß die Rolle mit ihrer Achse in den Wänden des Füllschachtes gelagert ist. Wie aus Fig.4 ersichtlich ist, liegt die Rolle 23 teilweise verdeckt hinter der Wandung 28 des Füllschachtes, die die Kontur eines Öffnungsrandes der Füllöffnung hat. Schräg oberhalb der Rolle 23 befindet sich ein Förderband 29, welches kurz vor der Rolle 23 über eine Umlenkwalze 30 läuft. Entsprechend dem Pfeil B bewegt sich das Fördertrum des Förderbandes 29 in Richtung auf den Füllschacht und fördert das einzufüllende Material heran. Die Rolle 23 bewegt sich entsprechend dem Pfeil C in hierzu entgegengesetzter Richtung, d. h. gegen die Einfüllrichtung des Füllgutes. An das Förderband 29 schließt sich ein Abdeckblech 31 an, welches dicht über der Rolle liegt und hinsichtlich seiner Unterkante an die konkave Kontur der Rolle 23 angepaßt ist. Dies bedeutet, daß nur der obere Sektor a der Rolle 23 freiliegt und auf das Füllgut einwirken kann.4, the device shown in FIGS. 1 and 2, insofar as it relates to the filling area, is arranged under a filling shaft 27, the cross-sectional area of which is essentially adapted to the cross-section of the filling opening 24. In this representation, the roller 23 is shown in cross section, it being assumed that the roller is mounted with its axis in the walls of the filling shaft. As can be seen from Figure 4, the roller 23 is partially hidden behind the wall 28 of the filling shaft, which has the contour of an opening edge of the filling opening. A conveyor belt 29 is located diagonally above the roller 23 and runs over a deflection roller 30 shortly before the roller 23. According to the arrow B, the conveyor run of the conveyor belt 29 moves in the direction of the filling shaft and conveys the material to be filled in. The roller 23 moves according to the arrow C in the opposite direction, that is. H. against the filling direction of the product. The conveyor belt 29 is followed by a cover plate 31, which lies closely above the roller and is adapted to the concave contour of the roller 23 with respect to its lower edge. This means that only the upper sector a of the roller 23 is exposed and can act on the filling material.

Wenn Füllgut mittels des Förderbandes 29 herangeführt wird, so fällt dieses auf das Abdeckblech 31 und von dort über den Sektor a der Rolle 23 in den Füllschacht 27 und von dort durch die Füllöffnung in den Beutel 22.When filling material is brought in by means of the conveyor belt 29, it falls onto the cover plate 31 and from there via the sector a of the roller 23 into the filling shaft 27 and from there through the filling opening into the bag 22.

Falls sich innerhalb des Füllschachtes 27 ein Stau ergibt, so wird dieser aufgelöst, sobald der Stau die Rolle 23 erreicht, da die Rolle der Füllrichtung des Füllgutes entgegengese ist und daher eine Auflockerungswirkung hat. Dadurch ist ein schnelles und ungestörtes Einfüllen auch bei einem Hochgeschwindigkeitsbetrieb der Anlage möglich.If there is a jam within the filling shaft 27, this is resolved as soon as the jam reaches the roller 23, since the roller is opposite to the filling direction of the filling material and therefore has a loosening effect. This enables fast and undisturbed filling even when the system is operating at high speed.

Claims (8)

1. Apparatus for opening out the charging orifices of bags made of film material or the like and interconnected in the form of a strip, which apparatus consists of two conveyor belts (9), between which the bags are moved by the edges of their orifices and which are each moved around at least one compensation roll (10) movable in the direction in which the bags are conveyed, the apparatus further consisting of a bag-opening means which engages between the edges of the orifices and comprises two flexible elements (11), which are each of fixed location at one end and are movably mounted at the other end, which elements, together with the associated conveying belts, grip the edges of the orifice of each bag and are outwardly movable by a positioning means so as to form the charging orifice (24), characterized in that a rotary part (23) is arranged above at least one of the edges of the charging orifice (24), which rotary part is mounted to rotate about an axis extending substantially parallel to the direction in which the bags are conveyed and is driven to rotate in the direction opposite that in which material is loaded into the bags.
2. Apparatus according to Claim 1, characterized in that the rotary part is formed as an axially symmetrical roll (23).
3. Apparatus according to Claim 1 or 2, characterized in that a charging chute (27) is arranged above, and matches the cross-section of, the charging orifice (24) a conveyor belt (29) adjoining said charging chute transversely of the direction in which the bags are conveyed.
4. Apparatus according to Claims 2 and 3, characterized in that the roll (23) has a concave axially symmetrical surface, the contour of which matches that of the charging orifice (24) and of the charging chute (27) adjoining it.
5. Apparatus according to Claim 4, characterized in that the contour of the roll (23) is flush with the wall (28) of the charging chute (27) that is located substantially vertically above that edge of the charging orifice (24) concerned, or said contour projects in part into the charging chute.
6. Apparatus according to at least one of Claims 3 and 4, characterized in that a cover plate (31) is arranged between the roll (23) and the conveyor belt (29), which cover plate is on the one hand secured to the charging chute (27) and on the other hand matches the contour of the roll (23) and partially covers it.
7. Apparatus according to at least one of Claims 2 to 6, characterized in that at least the surface of the roll (23) is made of rubber or plastics material, or is provided with closely aligned bristles.
8. Apparatus according to at least one of Claims 1 to 7, characterized in that the surface of the roll (23) is provided with axially symmetrical peripheral grooves.
EP81101295A 1980-02-28 1981-02-23 Device for expanding the filling holes of bags connected together in a strip-like fashion Expired EP0035205B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81101295T ATE4791T1 (en) 1980-02-28 1981-02-23 DEVICE FOR SPREADING THE FILLING OPENINGS OF TAPE-CONNECTED BAGS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3007588 1980-02-28
DE19803007588 DE3007588A1 (en) 1980-02-28 1980-02-28 DEVICE FOR SPREADING THE FILL OPENINGS OF BAG-BAG BAGS OF FILM MATERIAL OR THE LIKE.

Publications (2)

Publication Number Publication Date
EP0035205A1 EP0035205A1 (en) 1981-09-09
EP0035205B1 true EP0035205B1 (en) 1983-09-28

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EP81101295A Expired EP0035205B1 (en) 1980-02-28 1981-02-23 Device for expanding the filling holes of bags connected together in a strip-like fashion

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US (1) US4441304A (en)
EP (1) EP0035205B1 (en)
AT (1) ATE4791T1 (en)
DE (2) DE3007588A1 (en)

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US7182319B2 (en) * 2003-06-19 2007-02-27 Cook Technologies, Inc. Roller assembly for a lifting device for a personal-transportation vehicle
DE102012220730A1 (en) * 2012-11-14 2014-05-15 Robert Bosch Gmbh Tubular bag machine with a Gaseinstellvorrichtung and Gaseinstellvorrichtung for such a bag machine
CN105600009B (en) * 2015-11-11 2018-06-19 中银（宁波）电池有限公司 Battery plastics packaging bag expanding mechanism
CN111942666B (en) * 2020-07-30 2021-10-26 江西天元药业有限公司 Traditional chinese medicine processing equipment for packing
CN114955102B (en) * 2022-07-28 2022-11-04 安徽唯嵩光电科技有限公司 Core cylinder and conveying mechanism for plastic foaming mesh bag set

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Also Published As

Publication number Publication date
ATE4791T1 (en) 1983-10-15
US4441304A (en) 1984-04-10
DE3007588A1 (en) 1981-09-10
DE3160992D1 (en) 1983-11-03
EP0035205A1 (en) 1981-09-09

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