EP0548463A1 - Device for opening bags and mounting them onto a filling nozzle - Google Patents

Device for opening bags and mounting them onto a filling nozzle Download PDF

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Publication number
EP0548463A1
EP0548463A1 EP92113963A EP92113963A EP0548463A1 EP 0548463 A1 EP0548463 A1 EP 0548463A1 EP 92113963 A EP92113963 A EP 92113963A EP 92113963 A EP92113963 A EP 92113963A EP 0548463 A1 EP0548463 A1 EP 0548463A1
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EP
European Patent Office
Prior art keywords
bag
sack
alignment table
pivoting
spreading
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Granted
Application number
EP92113963A
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German (de)
French (fr)
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EP0548463B1 (en
Inventor
Karl-Wilhelm Kader
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CHRONOS HOLDING LTD
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Chronos Richardson GmbH
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Publication of EP0548463A1 publication Critical patent/EP0548463A1/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
    • B65B43/30—Opening or distending bags; Opening, erecting, or setting-up boxes, cartons, or carton blanks by grippers engaging opposed walls, e.g. suction-operated

Definitions

  • the invention relates to a device for spreading and placing sacks on a filler neck, in particular gusseted sacks, which have occasionally been fed to an alignment table with the sack opening lying forward.
  • a device of the type mentioned is known from DE 38 40 646 A1.
  • sacks are first pulled backwards out of a sack magazine, the closed sack bottom being at the front in the conveying direction.
  • the sacks are then pulled onto an alignment table with the sack opening facing forward, with the conveying direction reversed.
  • the system parts required for this can also be used in an unchanged manner in the device according to the subject matter of the present invention.
  • the alignment table is already part of the device according to the invention, which is firmly connected to the means for spreading and attaching the bags.
  • the device for spreading and attaching for example in the form of the automatic towing machine for open sacks OMPB II from Chronos Richardson GmbH, in which the bag opening by first suction cups, which can be moved against the bag wall below, and second suction cups, which can be moved against the upper bag wall and each are arranged in the region of the front edge of the sack, can be subjected to negative pressure and can be removed from the sack so that the sack opening expands.
  • Means are also provided which are designed as spreading arms, which move into the bag opening and move away from one another there, so that the bag opening is spread open completely.
  • the sack is gripped and held by this spreading alone.
  • the spreader arms By pivoting the spreader arms about a horizontal axis lying above the alignment table, the sack is now pushed onto a sack spout for filling and taken over by so-called sack clamps.
  • the push-on device of the type described above has the disadvantage that the sack edges are completely opened in the area of the sack edges, so that after the sack has been filled, a clearly defined side fold in the area of the sack opening cannot be restored. This is particularly disadvantageous when closing real gusseted bags, but also has an adverse effect when closing simple flat bags without multiple gussets. When using the previously known devices for closing, the filled sack had to be folded back, which means considerable effort.
  • the device represented here is suitable, on the one hand, to prevent the lateral sack folds from spreading open, in particular in the case of side gusseted sacks, but at the same time also to prevent the spread-open sack opening from collapsing even when the plug-in movement is rapid.
  • this is during the entire plugging process, ie. H. ensured until the sack is clamped on the sack nozzle.
  • the spreading blades synchronously follow the pivoting movement of the bag grippers from the alignment table to the bag nozzle.
  • the pivoting means for the expanding blades and the bag grippers are identical, so that the corresponding drive means only have to be present once.
  • the spreading vanes on a shorter swivel arm about a further horizontal axis, which is parallel to the former smaller radius are arranged to be pivotable relative to the first pivoting means, which in turn are designed to be pivotable.
  • the advantageous and favorable effect here is that the spreading vanes can only be removed in a position on the bag opening in which the bag opening has already been moved over the bag nozzle and that the spreading vanes, with the bag still clamped, returned to their starting position with the pivoting means can be swung back at the alignment table to pick up the next sack.
  • the basically common design of the pivoting means for the expanding blades and the bag grippers remains unaffected, so that overall a synchronous movement is ensured as long as the actuating means for the shorter pivoting arms are not actuated.
  • the spreading vanes or wedges are angled by approximately 90 ° with respect to the shorter swivel arms, which in turn are angled in the same sense again by approximately 30 to 50 °.
  • the ends of the shorter swivel arms are preferably located in an approximately horizontal swivel movement tangential to the plane of the alignment table when they are moved into the spread-out bag opening.
  • the alignment table has an end stop edge for the front sack edge, which lies in the swiveling path of the spreading vanes and can be folded down or displaced downwards. This gives the possibility to push the sack against the Align the stop edge exactly, then grasp it laterally with the bag grippers so that it is fixed in its position. Then the stop edge can be folded away and the sack can be spread with the suction means. The spreading vanes are then retracted in a final movement. This can be followed by a common swiveling movement of the bag grippers and the spreading vanes in a circular arc towards the bag nozzle.
  • the alignment table can furthermore have lateral adjustable guide edges.
  • Figure 1 shows a machine frame 1 in longitudinal section, in front of which, roughly indicated, a filling device 2 and a transversely passing conveyor track 3 can be seen.
  • A1 the axis of a sack nozzle is not shown in detail in a first position in which the sack can be attached.
  • This axis is tangent to the arc B of spreading vanes 4 and bag grippers 10 to be described in more detail when moving the first pivoting means about a first pivot axis X 1.
  • A2 the axis of the bag neck, not shown, is shown in a pivoted back into the vertical position, which is centrally and vertically above the conveyor track 3.
  • the spreading vanes 4 are attached directly to angled, shorter swivel arms 5, which can be actuated by means of actuating cylinders 6.
  • the first-mentioned pivoting means comprise pivoting arms 7 and adjusting levers 8, which can be acted upon by adjusting cylinders 9 arranged on the frame 1.
  • bag grippers 10 with claw pairs are arranged, which lie approximately in the plane of an alignment table 11 when the swivel arms 7 have the position shown.
  • the alignment table is closed at the front by a stop flap 12 against which a supplied sack can strike for alignment.
  • the flap 12 can be folded away from the path of the expansion blades 4 into the solid, approximately horizontal position by means of a pivot lever 13 and an actuating cylinder 14.
  • lower suction means 15 are provided, which can be approximated to the sack level by means of levers and actuating cylinders 16, and upper suction means 17, which can be lowered onto the sack level via a swivel arm 18 and upper actuating cylinder 19.
  • upper suction means 17 which can be lowered onto the sack level via a swivel arm 18 and upper actuating cylinder 19.
  • the movement can be reversed again and returned to the position shown, as a result of which the sack opening of an overlying sack opens.
  • the feeding of a sack onto the alignment table is essentially effected by a belt loop 21 which can be driven by a drive motor 20 with a belt drive.
  • a bag feed arrangement 22 Behind the alignment table is a bag feed arrangement 22, the front drive roller 23 of which can be driven in both directions and which can be pivoted overall by means of an actuating cylinder 24 between the position shown in broken lines and the position shown in broken lines.
  • a single sack In the lower position shown in dashed lines, a single sack can be removed from the sack magazine 25 by means of the sack retraction by lowering suction means 26 onto the sack stack (not shown), applying a vacuum and lifting it off again.
  • a swivel arm 27 is provided above the sack magazine, which can execute the specified movements by means of a lifting cylinder 28.
  • the suction means 26 are longitudinally displaceable, so that in the case of ancestors in the position of the suction means shown in the extended position, the front sack bottom can already be grasped and drawn in by the feed roller 23 of the feed arrangement 22. Then the feed arrangement 22 is brought into the upper position shown in solid lines and the drive direction is reversed.
  • FIG 2a the detail previously shown in longitudinal section is shown in side view; in Figure 2b in front view. Both are described below together.
  • the swivel arms 6 and double swivel arms 5 with the spreading vanes 4 are arranged on the swivel arms 7 shown here only in front view.
  • the arms 7 are fastened to a rotating beam 31 and to this and to one another via a first pivot 32 and a connecting bracket 33 connected with each other.
  • An axis of rotation 35 is held in the front bearing bushes 34, which supports the arms 5 directly and which can be rotated by the actuating cylinder 6 via the lever 36.
  • the axis 35 is rotatable about the axis of rotation X2 for the expansion blades.
  • Swivel arms 37 are also provided in pairs, which cover the cylinder 6 in the side view. These swivel arms 37 are also connected in a rotationally fixed manner to the rotary beam 31. There is no other connection between them.
  • further actuating cylinders 38 are mounted in journals 39, which serve to actuate the pair of bag clamps 10.
  • These each include pairs of claws 40 which are pivotable on pivots 41 about parallel axes of rotation X3, X4. Only one of the pins 41 can be driven directly via a lever 42. The pivot pins are in engagement with one another via toothings 44, so that they are driven in opposite directions by the actuating cylinders 38. As a result, the claws 40 can be pivoted into the closed position shown in dashed lines. With dashed lines, the sack S is shown here in particular as a side-gusset sack into which the expanding blades are inserted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Making Paper Articles (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Abstract

Device for opening bags and mounting them onto a filling nozzle, especially side-folding bags which have been supplied individually separated to an orienting table (11), with the bag aperture located at the front, there being at least first sucker means (15) which are mounted on the orienting table and which are movable in the region of the bag aperture up against the lower bag wall, at least second sucker means (17) which are mounted on the orienting table and which are movable up against the upper bag wall, the two sucker means being movable away from one another by being subjected to a vacuum, a pair of spreading blades (4) which are movable into the bag aperture in the vicinity of the side fold and which are fastened to first pivoting means (7) and are pivotable about a horizontal pivot axis (X1) lying above the orienting table, a pair of bag grippers (10) with pairs of claws (40) which are pivotable about axes of rotation (X3, X4) lying parallel to the plane of the orienting table and which can thereby be opened and closed and are so arranged that they respectively grasp the two side folds in the region of the bag aperture, and pivoting means (37) for the bag grippers, which are pivotable about the same horizontal axis lying above the orienting table as the first pivoting means for the spreading blades. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Aufspreizen und Aufstecken von Säcken auf einen Abfüllstutzen, insbesondere von Seitenfaltensäcken, die vereinzelt einem Ausrichttisch mit der Sacköffnung nach vorne liegend zugeführt worden sind. Eine Vorrichtung der genannten Art ist aus der DE 38 40 646 A1 bekannt. Bei dieser Vorrichtung werden Säcke aus einem Sackmagazin zunächst nach hinten weggezogen, wobei der geschlossene Sackboden in Förderrichtung vorne liegt. Anschließend werden die Säcke bei umgekehrter Förderrichtung mit der Sacköffnung nach vorne liegend auf einen Ausrichttisch gezogen. Die hierfür erforderlichen Anlagenteile können in unveränderter Weise auch bei der Vorrichtung nach dem Gegenstand der vorliegenden Erfindung Verwendung finden. Der Ausrichttisch ist dabei bereits Bestandteil der erfindungsgemäßen Vorrichtung, der mit den Mitteln zum Aufspreizen und Aufstecken der Säcke fest verbunden wird.The invention relates to a device for spreading and placing sacks on a filler neck, in particular gusseted sacks, which have occasionally been fed to an alignment table with the sack opening lying forward. A device of the type mentioned is known from DE 38 40 646 A1. In this device, sacks are first pulled backwards out of a sack magazine, the closed sack bottom being at the front in the conveying direction. The sacks are then pulled onto an alignment table with the sack opening facing forward, with the conveying direction reversed. The system parts required for this can also be used in an unchanged manner in the device according to the subject matter of the present invention. The alignment table is already part of the device according to the invention, which is firmly connected to the means for spreading and attaching the bags.

Es sind Vorrichtungsteile zum Aufspreizen und Aufstecken beispielsweise in Form des Anhängeautomaten für offene Säcke OMPB II der Chronos Richardson GmbH bekannt, bei dem die Sacköffnung durch erste Sauger, die gegen die untenliegende Sackwand, und zweite Sauger, die gegen die obere Sackwand bewegbar sind und jeweils im Bereich des vorderen Sackrandes angeordnet sind, mit Unterdruck beaufschlagbar und vom Sack entfernbar sind, so daß sich die Sacköffnung spreizt.There are parts of the device for spreading and attaching, for example in the form of the automatic towing machine for open sacks OMPB II from Chronos Richardson GmbH, in which the bag opening by first suction cups, which can be moved against the bag wall below, and second suction cups, which can be moved against the upper bag wall and each are arranged in the region of the front edge of the sack, can be subjected to negative pressure and can be removed from the sack so that the sack opening expands.

Weiter sind Mittel vorgesehen, die als Spreizarme ausgebildet sind, die in die Sacköffnung einfahren und sich dort voneinander entfernen, so daß die Sacköffnung vollkommen aufgespreizt wird. Allein durch dieses Aufspreizen wird der Sack gegriffen und gehalten. Durch eine Schwenkbewegung der Spreizarme um eine horizontale oberhalb des Ausrichttisches liegende Achse, wird nunmehr der Sack auf einen Sackstutzen zum Abfüllen aufgeschoben und dort von sogenannten Sackklemmen übernommen.Means are also provided which are designed as spreading arms, which move into the bag opening and move away from one another there, so that the bag opening is spread open completely. The sack is gripped and held by this spreading alone. By pivoting the spreader arms about a horizontal axis lying above the alignment table, the sack is now pushed onto a sack spout for filling and taken over by so-called sack clamps.

Die Aufsteckvorrichtung der vorbeschriebenen Art hat den Nachteil, daß im Bereich der Sackkanten ein völliges Öffnen des Sackquerschnittes erfolgt, so daß nach Befüllen des Sackes eine klar definierte Seitenfalte im Bereich der Sacköffnung nicht wieder hergestellt werden kann. Dies ist insbesondere nachteilig beim Verschließen von echten Seitenfaltensäcken, wirkt sich jedoch auch beim Verschließen von einfachen Flachsäcken ohne mehrfache Seitenfalten nachteilig aus. Der gefüllte Sack war bei Verwendung der bisher bekannten Vorrichtungen zum Verschließen zunächst zurückzufalten, was erheblichen Aufwand bedeutet.The push-on device of the type described above has the disadvantage that the sack edges are completely opened in the area of the sack edges, so that after the sack has been filled, a clearly defined side fold in the area of the sack opening cannot be restored. This is particularly disadvantageous when closing real gusseted bags, but also has an adverse effect when closing simple flat bags without multiple gussets. When using the previously known devices for closing, the filled sack had to be folded back, which means considerable effort.

Vom Hersteller Slidell, Owatonna, USA, sind Vorrichtungen zum Spreizen und Aufstecken bekannt, bei denen das Aufspreizen der Säcke ausschließlich mit auf die Sackflächen einwirkenden Saugern erfolgt, während Greifermittel vorgesehen sind, die gleichzeitig die seitlichen Sackfalten, insbesondere bei Seitenfaltensäcken, in ihrer ursprünglichen Stellung festhalten, bis der Sack auf den Abfüllstutzen aufgesteckt ist. Die Sauger müssen nahe an der Kante des Sackes angreifen. Sie behindern damit die am aufgesteckten Sack anzudrückenden Sackklemmen in ihrer Bewegungsfreiheit, da sie nach dem Anklemmen in einer Schwenkbewegung auch von der Rückseite des Sackes aus - vom Ausrichttisch aus gesehen - zurückzuführen sind. Eine derartige Vorrichtung ist nur bei sehr steifen Säcken geeignet, da während des schnellen Aufsteckvorganges ein Zusammenfalten der Sacköffnung möglich ist und somit anschließende Fehlfunktionen nicht ausgeschlossen werden können.From the manufacturer Slidell, Owatonna, USA, devices for spreading and attaching are known, in which the spreading of the sacks takes place exclusively with suction devices acting on the sack surfaces, while gripping means are provided which simultaneously the lateral sack folds, in particular in the case of side gusset sacks, in their original position hold until the sack is placed on the filler neck. The suction cups must grip close to the edge of the sack. They thus hinder the freedom of movement of the bag clamps to be pressed onto the attached bag, since after being clamped on, they can also be traced in a swiveling motion from the back of the bag - as seen from the alignment table. A Such a device is only suitable for very stiff sacks, since the sack opening can be folded up during the quick attachment process and consequently subsequent malfunctions cannot be ruled out.

Hiervon ausgehend ist es Aufgabe der vorliegenden Erfindung, eine Vorrichtung der eingangs genannten Art bereitzustellen, die auch bei Säcken aus schwierigen Materialien, sei es Papier, Kunststoff oder Polypropylengewebe, ein Aufstecken auf den Abfüllstutzen ohne Aufspringen der Seitenfalten im Bereich der Sacköffnung in verbesserter Weise ermöglicht.Proceeding from this, it is an object of the present invention to provide a device of the type mentioned at the outset which, even in the case of sacks made of difficult materials, be it paper, plastic or polypropylene fabric, enables them to be plugged onto the filler neck in an improved manner without the side folds in the area of the bag opening .

Die Lösung hierfür besteht in der Kombination der folgenden Merkmale

  • zumindest erste am Ausrichttisch gelagerte Saugermittel, die im Bereich der Sacköffnungskante gegen die untenliegende Sackwand bewegbar sind, zumindest zweite am Ausrichttisch gelagerte Saugermittel, die im Bereich der Sacköffnung gegen die obenliegende Sackwand bewegbar sind,
    wobei die beiden Saugermittel unterdruckbeaufschlagt voneinander entfernbar sind,
  • ein Paar von in die Sacköffnung in Seitenfaltennähe einfahrbare Spreizschaufeln, die an ersten Schwenkmitteln befestigt sind, die um eine horizontale, oberhalb des Ausrichttisches liegende Achse schwenkbar sind,
  • ein Paar Sackgreifer mit Klauenpaaren, die um parallel zur Ebene des Ausrichttisches liegende Drechachsen schwenkbar und dadurch öffen- und schließbar sind und so angeordnet sind, daß sie jeweils die beiden Seitenfalten im Bereich der Sacköffnung erfassen, sowie
  • Schwenkmittel für die Sackgreifer, die um die gleiche horizontale, oberhalb des Ausrichttisches liegende Achse schwenkbar sind, wie die ersten Schwenkmittel für die Spreizschaufeln.
The solution to this is to combine the following features
  • at least first suction means mounted on the alignment table, which can be moved in the area of the sack opening edge against the sack wall below, at least second suction means mounted on the alignment table, which can be moved in the area of the sack opening against the top sack wall,
    wherein the two suction means can be removed from each other when subjected to negative pressure,
  • a pair of spreading vanes which can be inserted into the sack opening in the vicinity of the side gussets and which are fastened to first pivoting means which can be pivoted about a horizontal axis lying above the alignment table,
  • a pair of bag grippers with pairs of claws which can be pivoted about turning axes lying parallel to the plane of the alignment table and can thus be opened and closed and are arranged such that they each grip the two side folds in the area of the bag opening, and
  • Swiveling means for the bag grippers, which can be swiveled around the same horizontal axis above the alignment table as the first swiveling means for the spreading vanes.

Die hiermit wiedergegebene Vorrichtung ist geeignet, einerseits das Aufspreizen der seitlichen Sackfalten, insbesondere bei Seitenfaltensäcken zu verhindern, gleichzeitig jedoch auch bei schneller Aufsteckbewegung ein Zusammenfallen der aufgespreizten Sacköffnung zu verhindern. Durch die erfindungsgemäße Vorrichtung ist dies während des gesamten Aufsteckvorganges, d. h. bis zum Anklemmen des Sackes am Sackstutzen sichergestellt. Hierfür ist vorgesehen, daß die Spreizschaufeln die Schwenkbewegung der Sackgreifer vom Ausrichttisch zum Sackstutzen synchron mitvollziehen. Dadurch, daß die Spreizschaufeln bei aufgestecktem Sack innerhalb der Sacköffnung seitlich vom Abfüllstutzen liegen, behindern sie die Sackklemmen nicht, da sie durch weiterschwenken ihrer Schwenkmittel nach oben aus dem Arbeitsbereich der Sackklemmen am Abfüllstutzen herausbewegt werden können. In bevorzugter Ausführung sind die Schwenkmittel für die Spreizschaufeln und die Sackgreifer identisch, so daß die entsprechenden Antriebsmittel nur einmal vorhanden sein müssen.The device represented here is suitable, on the one hand, to prevent the lateral sack folds from spreading open, in particular in the case of side gusseted sacks, but at the same time also to prevent the spread-open sack opening from collapsing even when the plug-in movement is rapid. By means of the device according to the invention, this is during the entire plugging process, ie. H. ensured until the sack is clamped on the sack nozzle. For this purpose, it is provided that the spreading blades synchronously follow the pivoting movement of the bag grippers from the alignment table to the bag nozzle. The fact that the spreading vanes lie inside the sack opening to the side of the filler neck when the sack is attached does not hinder the sack clamps because they can be moved out of the working area of the sack clamps on the filler neck by pivoting their pivoting means upward. In a preferred embodiment, the pivoting means for the expanding blades and the bag grippers are identical, so that the corresponding drive means only have to be present once.

In besonders günstiger Ausführung ist vorgesehen, daß die Spreizschaufeln um eine weitere horizontale Achse, die zur erstgenannten parallel liegt, an kürzen Schwenkarmen auf kleinerem Radius gegenüber den ihrerseits schwenkbar ausgeführten ersten Schwenkmitteln schwenkbar angeordnet sind. Die vorteilhafte und günstige Wirkung hierbei besteht darin, daß die Spreizschaufeln erst in einer Position auf der Sacköffnung heraus entfernt werden können, in der die Sacköffnung bereits über den Sackstutzen gefahren worden ist und daß die Spreizschaufeln bei noch angeklemmten Sack wieder mit den Schwenkmitteln in ihre Ausgangsposition am Ausrichttisch zurückgeschwenkt werden können um den nächsten Sack aufzunehmen. Die grundsätzlich gemeinsame Ausführung der Schwenkmittel für die Spreizschaufeln und die Sackgreifer bleibt davon unberührt, so daß insgesamt eine synchrone Bewegung sichergestellt ist, solange die Betätigungsmittel für die kürzeren Schwenkarme nicht betätigt werden.In a particularly favorable embodiment it is provided that the spreading vanes on a shorter swivel arm about a further horizontal axis, which is parallel to the former smaller radius are arranged to be pivotable relative to the first pivoting means, which in turn are designed to be pivotable. The advantageous and favorable effect here is that the spreading vanes can only be removed in a position on the bag opening in which the bag opening has already been moved over the bag nozzle and that the spreading vanes, with the bag still clamped, returned to their starting position with the pivoting means can be swung back at the alignment table to pick up the next sack. The basically common design of the pivoting means for the expanding blades and the bag grippers remains unaffected, so that overall a synchronous movement is ensured as long as the actuating means for the shorter pivoting arms are not actuated.

In besonders günstiger Weiterbildung der Erfindung sind die Spreizschaufeln oder -keile gegenüber den kürzeren Schwenkarmen um etwa 90° abgewinkelt, wobei diese ihrerseits im gleichen Sinne nochmals um etwa 30 bis 50° abgewinkelt sind. Auf diese Weise ist ein problemloses Einführen der Spreizschaufeln in die geöffnete Sacköffnung möglich, ohne daß Teile der Schwenkarme mit den Kanten der Sacköffnung, d. h. dem Sackrand in Kontakt kommen. Die Enden der kürzeren Schwenkarme befinden sich vorzugsweise in etwa horizontaler Schwenkbewegung tangential zur Ebene des Ausrichttisches, wenn sie in die aufgespreizte Sacköffnung eingefahren werden.In a particularly advantageous development of the invention, the spreading vanes or wedges are angled by approximately 90 ° with respect to the shorter swivel arms, which in turn are angled in the same sense again by approximately 30 to 50 °. In this way, a trouble-free insertion of the expansion blades into the open bag opening is possible without parts of the pivot arms with the edges of the bag opening, i. H. the edge of the sack. The ends of the shorter swivel arms are preferably located in an approximately horizontal swivel movement tangential to the plane of the alignment table when they are moved into the spread-out bag opening.

Der Ausrichttisch hat in günstiger Ausführung eine Endanschlagkante für die vordere Sackkante, die im Schwenkweg der Spreizschaufeln liegt und aus diesem nach unten wegklappbar oder verschiebbar ist. Hiermit ist die Möglichkeit gegeben, den Sack durch Vorwärtsschieben gegen die Anschlagkante exakt auszurichten, dann seitlich mit den Sackgreifern zu fassen, so daß er in seiner Lage fixiert ist. Anschließend kann die Anschlagkante weggeklappt und der Sack mit den Saugermitteln gespreizt werden. In einem letzten Bewegungsvorgang werden dann die Spreizschaufeln eingefahren. Hieran kann sich eine gemeinsame schnelle Schwenkbewegung der Sackgreifer und der Spreizschaufeln auf Kreisbogen zum Sackstutzen hin anschließen. Neben der genannten wegklappbaren vorderen Anschlagkante kann der Ausrichttisch weiterhin seitliche verstellbare Führungskanten aufweisen.The alignment table has an end stop edge for the front sack edge, which lies in the swiveling path of the spreading vanes and can be folded down or displaced downwards. This gives the possibility to push the sack against the Align the stop edge exactly, then grasp it laterally with the bag grippers so that it is fixed in its position. Then the stop edge can be folded away and the sack can be spread with the suction means. The spreading vanes are then retracted in a final movement. This can be followed by a common swiveling movement of the bag grippers and the spreading vanes in a circular arc towards the bag nozzle. In addition to the foldable front stop edge mentioned, the alignment table can furthermore have lateral adjustable guide edges.

Ein bevorzugtes Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnungen beschrieben.

Fig. 1
zeigt eine erfindungsgemäße Vorrichtung mit allen Einzelheiten in Seitenansicht;
Fig. 2a
zeigt die Schwenkmittel für die Sackgreifer und die Spreizschaufeln nach Fig. 1 als vergrößerte Einzelheit;
Fig. 2b
zeigt die Schwenkmittel nach Fig. 2a in Frontansicht.
A preferred embodiment of the invention is described below with reference to the drawings.
Fig. 1
shows an inventive device with all details in side view;
Fig. 2a
shows the pivoting means for the bag gripper and the spreading blades of Figure 1 as an enlarged detail.
Fig. 2b
shows the pivoting means of Fig. 2a in front view.

Figur 1 zeigt ein Maschinengestell 1 im Längsschnitt, vor dem grob angedeutet eine Abfüllvorrichtung 2 und eine quer vorbeilaufende Förderbahn 3 erkennbar sind. Mit A₁ ist die Achse eines im einzelnen nicht näher dargestellten Sackstutzens in einer ersten Position bezeichnet, in der das Aufstecken eines Sackes erfolgen kann. Diese Achse liegt tangential zum Bogen B von noch näher zu beschreibenden Spreizschaufeln 4 und Sackgreifern 10 bei der Bewegung erster Schwenkmittel um eine erste Schwenkachse X₁. Mit A₂ ist die Achse des nicht dargestellten Sackstutzens in einer in die Vertikale zurückgeschwenkten Stellung gezeigt, die mittig und senkrecht über der Förderbahn 3 liegt. Mit A₃ ist eine andere denkbare Position eines vertikalen nicht schwenkbaren Sackstutzens angezeigt, die eine andere Positionierung der Förderbahn 3 erfordern würde. Die Spreizschaufeln 4 sind weiterhin auf einer nicht im einzelnen dargestellten Kreisbahn, die jedoch durch ihre zwei Endstellungen erkennbar ist, um eine zweite Schwenkachse X₂ gegenüber den um die Achse X₁ beweglichen Schwenkmitteln ihrerseits beweglich.Figure 1 shows a machine frame 1 in longitudinal section, in front of which, roughly indicated, a filling device 2 and a transversely passing conveyor track 3 can be seen. With A₁ the axis of a sack nozzle is not shown in detail in a first position in which the sack can be attached. This axis is tangent to the arc B of spreading vanes 4 and bag grippers 10 to be described in more detail when moving the first pivoting means about a first pivot axis X 1. With A₂, the axis of the bag neck, not shown, is shown in a pivoted back into the vertical position, which is centrally and vertically above the conveyor track 3. With A₃ another conceivable position of a vertical non-pivoting sack nozzle is displayed, which would require a different positioning of the conveyor track 3. The expansion blades 4 are still on a circular path, not shown in detail, but which is recognizable by its two end positions, in turn movable about a second pivot axis X₂ relative to the pivoting means movable about the axis X₁.

Die Spreizschaufeln 4 sind an abgewinkelten kürzeren Schwenkarmen 5 unmittelbar befestigt, die mittels Stellzylindern 6 betätigbar sind. Die erstgenannten Schwenkmittel umfassen Schwenkarme 7 und Stellhebel 8, die über am Gestell 1 angeordnete Stellzylinder 9 beaufschlagbar sind. Am äußeren Ende der Schwenkarme 7 sind Sackgreifer 10 mit Klauenpaaren angeordnet, die etwa in der Ebene eines Ausrichttisches 11 liegen, wenn die Schwenkarme 7 die dargestellte Position haben. Der Ausrichttisch wird nach vorne durch eine Anschlagklappe 12 abgeschlossen, gegen die ein zugeführter Sack zum Ausrichten anschlagen kann. Die Klappe 12 ist über einen Schwenkhebel 13 und einen Stellzylinder 14 aus dem Weg der Spreizschaufeln 4 in die durchgezogen dargestellte, etwa horizontale Stellung wegklappbar. Zum Öffnen eines dem Ausrichttisch 11 zugeführten Sackes sind untere Saugermittel 15 vorgesehen, die über Hebel und Stellzylinder 16 der Sackebene angenähert werden können, sowie obere Saugermittel 17, die über einen Schwenkarm 18 und obere Stellzylinder 19 auf die Sackebene abgesenkt werden können. Nach Unterdruckbeaufschlagung kann die Bewegung wieder umgekehrt und in die dargestellte Position zurückgeführt werden, wodurch sich die Sacköffnung eines aufliegenden Sackes öffnet. Das Zuführen eines Sackes auf den Ausrichttisch, wird im wesentlichen durch eine Bandschleife 21 bewirkt, die von einem Antriebsmotor 20 mit einem Riementrieb antreibbar ist. Hinter dem Ausrichttisch-liegt einem Sackeinzugsanordnung 22, deren vordere Antriebsrölle 23 in beiden Richtungen antreibbar ist und der insgesamt zwischen der ausgezogen dargestellten und der gestrichelt dargestellten Position mittels eines Stellzylinders 24 schwenkbar ist. In der unteren gestrichelt dargestellten Position kann mittels des Sackeinzuges ein einzelner Sack aus dem Sackmagazin 25 entnommen werden, indem Saugermittel 26 auf den nicht dargestellten Sackstapel abgesenkt werden, unterdruckbeaufschlagt werden und von diesem wieder abgehoben werden. Hierzu ist ein Schwenkarm 27 oberhalb des Sackmagazines vorgesehen, der mittels eines Hubzylinders 28 die angegebenen Bewegungen ausführen kann. Gegenüber dem Schwenkarm sind die Saugermittel 26 längs verschieblich, so daß bei Vorfahren in die ausgezogen dargestellte Position der Saugermittel der vorne liegende Sackboden bereits von der Einzugsrolle 23 der Einzugsanordnung 22 erfasst und eingezogen werden kann. Danach wird die Einzugsanordnung 22 in die obere durchgezogen dargestellte Position gebracht und die Antriebsrichtung umgekehrt.The spreading vanes 4 are attached directly to angled, shorter swivel arms 5, which can be actuated by means of actuating cylinders 6. The first-mentioned pivoting means comprise pivoting arms 7 and adjusting levers 8, which can be acted upon by adjusting cylinders 9 arranged on the frame 1. At the outer end of the swivel arms 7, bag grippers 10 with claw pairs are arranged, which lie approximately in the plane of an alignment table 11 when the swivel arms 7 have the position shown. The alignment table is closed at the front by a stop flap 12 against which a supplied sack can strike for alignment. The flap 12 can be folded away from the path of the expansion blades 4 into the solid, approximately horizontal position by means of a pivot lever 13 and an actuating cylinder 14. To open a sack fed to the alignment table 11, lower suction means 15 are provided, which can be approximated to the sack level by means of levers and actuating cylinders 16, and upper suction means 17, which can be lowered onto the sack level via a swivel arm 18 and upper actuating cylinder 19. After the application of negative pressure, the movement can be reversed again and returned to the position shown, as a result of which the sack opening of an overlying sack opens. The feeding of a sack onto the alignment table is essentially effected by a belt loop 21 which can be driven by a drive motor 20 with a belt drive. Behind the alignment table is a bag feed arrangement 22, the front drive roller 23 of which can be driven in both directions and which can be pivoted overall by means of an actuating cylinder 24 between the position shown in broken lines and the position shown in broken lines. In the lower position shown in dashed lines, a single sack can be removed from the sack magazine 25 by means of the sack retraction by lowering suction means 26 onto the sack stack (not shown), applying a vacuum and lifting it off again. For this purpose, a swivel arm 27 is provided above the sack magazine, which can execute the specified movements by means of a lifting cylinder 28. Compared to the swivel arm, the suction means 26 are longitudinally displaceable, so that in the case of ancestors in the position of the suction means shown in the extended position, the front sack bottom can already be grasped and drawn in by the feed roller 23 of the feed arrangement 22. Then the feed arrangement 22 is brought into the upper position shown in solid lines and the drive direction is reversed.

In Figur 2a ist die zuvor im Längsschnitt dargestellte Einzelheit in Seitenansicht dargestellt; in Figur 2b in Frontansicht.. Beide werden im folgenden gemeinsam beschrieben. Es sind an den hier nur in Vorderansicht dargestellten Schwenkarmen 7 der Schwenkzylinder 6 sowie doppelt ausgeführte kürzere Schwenkarme 5 mit den Spreizschaufeln 4 angeordnet. Die Arme 7 sind an einem Drehbalken 31 befestigt und mit diesem sowie untereinander über einen ersten Drehzapfen 32 und eine Verbindungslasche 33 miteinander verbunden. In vorderen Lagerbuchsen 34 ist eine Drehachse 35 gehalten, die die Arme 5 unmittelbar trägt und die über den Hebel 36 vom Stellzylinder 6 drehbar ist. Die Achse 35 ist um die Drehachse X₂ für die Spreizschaufeln drehbar. Ebenfalls paarweise sind Schwenkarme 37 vorgesehen, die in der Seitenansicht den Zylinder 6 verdecken. Diese Schwenkarme 37 sind ebenfalls mit dem Drehbalken 31 drehfest verbunden. Eine weitere Verbindung untereinander ist nicht vorhanden. Außen an den Schwenkarmen 37 sind weitere Stellzylinder 38 in Lagerzapfen 39 gelagert, die der Betätigung der paarweise vorhandenen Sackklemmen 10 dienen. Diese umfassen jeweils paarweise vorhandene Klauen 40, die auf Drehzapfen 41 um parallele Drehachsen X₃, X₄ schwenkbar sind. Nur jeweils einer der Zapfen 41 ist über einen Hebel 42 unmittelbar antreibbar. Die Drehzapfen sind über Verzahnungen 44 miteinander im Eingriff, so daß sie von den Stellzylindern 38 gegenläufig angetrieben werden. Hierdurch können die Klauen 40 in die gestrichelt dargestellte geschlossene Position geschwenkt werden. Mit gestrichelten Linien ist der Sack S hier insbesondere als Seitenfaltensack dargestellt, in den die Spreizschaufeln eingefahren sind.In Figure 2a, the detail previously shown in longitudinal section is shown in side view; in Figure 2b in front view. Both are described below together. The swivel arms 6 and double swivel arms 5 with the spreading vanes 4 are arranged on the swivel arms 7 shown here only in front view. The arms 7 are fastened to a rotating beam 31 and to this and to one another via a first pivot 32 and a connecting bracket 33 connected with each other. An axis of rotation 35 is held in the front bearing bushes 34, which supports the arms 5 directly and which can be rotated by the actuating cylinder 6 via the lever 36. The axis 35 is rotatable about the axis of rotation X₂ for the expansion blades. Swivel arms 37 are also provided in pairs, which cover the cylinder 6 in the side view. These swivel arms 37 are also connected in a rotationally fixed manner to the rotary beam 31. There is no other connection between them. On the outside of the swivel arms 37, further actuating cylinders 38 are mounted in journals 39, which serve to actuate the pair of bag clamps 10. These each include pairs of claws 40 which are pivotable on pivots 41 about parallel axes of rotation X₃, X₄. Only one of the pins 41 can be driven directly via a lever 42. The pivot pins are in engagement with one another via toothings 44, so that they are driven in opposite directions by the actuating cylinders 38. As a result, the claws 40 can be pivoted into the closed position shown in dashed lines. With dashed lines, the sack S is shown here in particular as a side-gusset sack into which the expanding blades are inserted.

BezugszeichenlisteReference symbol list

1
Gestell
2
Füllvorrichtung
3
Förderbahn
4
Spreizschaufel
5
Schwenkarm (kurz)
6
Stellzylinder
7
Schwenkarm
8
Hebelarm
9
Stellzylinder
10
Sackgreifer
11
Ausrichttisch
12
Anschlagleiste
13
Hebel
14
Stellzylinder
15
Saugmittel
16
Stellzylinder
17
Saugmittel
18
Hebelarm
19
Stellzylinder
20
Antriebsmotor
21
Bandschleife
22
Einzugsvorrichtung
23
Antriebsrolle
24
Stellzylinder
25
Sackmagazin
26
Saugermittel
27
Schwenkhebel
28
Stellzylinder
31
Drehbalken
32
Drehzapfen
33
Lasche
34
Lagerauge
35
Drehachse
36
Hebelarm
37
Schwenkarm
38
Stellzylinder
39
Stehlager
40
Klaue
41
Drehzapfen
42
Hebel

43
44
Verzahnung

A₁ - A₃
Stutzenachse
X₁ - X₄
Drehachsen
1
frame
2nd
Filling device
3rd
Conveyor track
4th
Spreading vane
5
Swivel arm (short)
6
Actuator cylinder
7
Swivel arm
8th
Lever arm
9
Actuator cylinder
10th
Bag grab
11
Alignment table
12th
Stop bar
13
lever
14
Actuator cylinder
15
Absorbent
16
Actuator cylinder
17th
Absorbent
18th
Lever arm
19th
Actuator cylinder
20th
Drive motor
21
Ribbon loop
22
Infeed device
23
Drive roller
24th
Actuator cylinder
25th
Sack magazine
26
Vacuum cleaner
27th
Swivel lever
28
Actuator cylinder
31
Rotating beam
32
Pivot
33
Tab
34
Bearing eye
35
Axis of rotation
36
Lever arm
37
Swivel arm
38
Actuator cylinder
39
Pillow block
40
claw
41
Pivot
42
lever

43
44
Gearing

A₁ - A₃
Nozzle axis
X₁ - X₄
Axes of rotation

Claims (7)

Vorrichtung zum Aufspreizen und Aufstecken von Säcken auf einen Abfüllstutzen, insbesondere von Seitenfaltensäcken, die vereinzelt einem Ausrichttisch (11) mit der Sacköffnung nach vorne liegend zugeführt worden sind,
gekennzeichnet durch
zumindest erste am Ausrichttisch gelagerte Saugermittel (15) die im Bereich der Sacköffnung gegen die untenliegende Sackwand bewegbar sind,
zumindest zweite am Ausrichttisch gelagerte Saugermittel (17) die gegen die obenliegende Sackwand bewegbar sind,
wobei die beiden Saugermittel (15, 17) unterdruckbeaufschlagt voneinander entfernbar sind,
ein Paar von in die Sacköffnung in Seitenfaltennähe einfahrbaren Spreizschaufeln (4) die an ersten Schwenkmitteln (7) befestigt sind und um eine horizontale, oberhalb des Ausrichttisches (11) liegende Schwenkachse X₁ schwenkbar sind,
ein Paar Sackgreifer (10) mit Klauenpaaren (40), die um parallel zur Ebene des Ausrichttisches liegende Drehachsen X₃, X₄ schwenkbar und dadurch öffen- und schließbar sind und so angeordnet sind, daß sie jeweils die beiden Seitenfalten im Bereich der Sacköffnung erfassen, sowie Schwenkmittel (37) für die Sackgreifer (10), die um die gleiche horizontale, oberhalb des Ausrichttisches (11) liegende Achse X₁ schwenkbar sind, wie die ersten Schwenkmittel für die Spreizschaufeln.Device for spreading and placing sacks on a filler neck, in particular gusseted sacks, which have occasionally been fed to an alignment table (11) with the sack opening lying forward,
marked by
at least first suction means (15) mounted on the alignment table, which can be moved in the area of the bag opening against the bag wall located below,
at least second suction means (17) mounted on the alignment table, which can be moved against the sack wall above,
wherein the two suction means (15, 17) can be removed from one another when subjected to negative pressure,
a pair of spreading vanes (4) which can be moved into the sack opening in the vicinity of the side gussets and which are fastened to first pivoting means (7) and can be pivoted about a horizontal pivot axis X 1 lying above the alignment table (11),
a pair of bag grippers (10) with pairs of claws (40) which can be pivoted about axes of rotation X₃, X parallel lying parallel to the plane of the alignment table and thereby can be opened and closed and are arranged such that they each grip the two side folds in the area of the bag opening, and Swiveling means (37) for the bag grippers (10) which can be swiveled about the same horizontal axis X 1 lying above the alignment table (11) as the first swiveling means for the spreading vanes. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Spreizschaufeln (4) um eine weitere horizontale Schwenkachse X₂, die zur erstgenannten Schwenkachse X₁ parallel liegt, an kürzeren Schwenkarmen (5) auf kleinerem Radius gegenüber den ihrerseits schwenkbaren ersten Schwenkmitteln (7) schwenkbar angeordnet sind.Device according to claim 1,
characterized,
that the expansion blades (4) about a further horizontal pivot axis X₂, which is parallel to the first-mentioned pivot axis X₁, are arranged on shorter pivot arms (5) on a smaller radius relative to the pivotable first pivoting means (7). Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Schwenkmittel (7, 37) für die Spreizschaufeln (4) und für die Sackgreifer (10) miteinander verbunden und mit gemeinsamen Antriebsmitteln (8, 9) verbunden sind.Device according to claim 1 or 2,
characterized,
that the pivoting means (7, 37) for the expanding blades (4) and for the bag grippers (10) are connected to one another and to common drive means (8, 9). Vorrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die Spreizschaufeln (4) gegenüber den kürzeren Schwenkarmen (5) um etwa 90° abgewinkelt sind, die ihrerseits im gleichen Sinne nochmals um etwa 30 bis 50° abgewinkelt sind.Device according to one of claims 1 to 3,
characterized,
that the spreading vanes (4) are angled by approximately 90 ° relative to the shorter swivel arms (5), which in turn are angled in the same sense again by approximately 30 to 50 °. Vorrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die Schwenkmittel (7, 37) für die Spreizschaufeln (4) und die Sackgreifer (10) an einem gemeinsamen Drehbalken (31) fest angeordnet sind.Device according to one of claims 1 to 4,
characterized,
that the pivoting means (7, 37) for the expanding blades (4) and the bag grippers (10) are fixedly arranged on a common rotating beam (31). Vorrichtung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß der Ausrichttisch (11) eine Endanschlagleiste (12) aufweist, die im Schwenkweg der Spreizschaufeln (4) liegt und aus diesem nach unten wegklappbar oder verschiebbar ist.Device according to one of claims 1 to 5,
characterized,
that the alignment table (11) has an end stop bar (12) which lies in the pivoting path of the expansion blades (4) and can be folded down or displaced out of it. Vorrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
daß der Ausrichttisch (11) verstellbare Seitenanschlagkanten aufweist.Device according to one of claims 1 to 6,
characterized,
that the alignment table (11) has adjustable side stop edges.
EP92113963A 1991-12-14 1992-08-17 Device for opening bags and mounting them onto a filling nozzle Expired - Lifetime EP0548463B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4141253 1991-12-14
DE4141253A DE4141253A1 (en) 1991-12-14 1991-12-14 DEVICE FOR SPREADING AND PUTTING UP BAGS

Publications (2)

Publication Number Publication Date
EP0548463A1 true EP0548463A1 (en) 1993-06-30
EP0548463B1 EP0548463B1 (en) 1995-10-25

Family

ID=6447042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92113963A Expired - Lifetime EP0548463B1 (en) 1991-12-14 1992-08-17 Device for opening bags and mounting them onto a filling nozzle

Country Status (5)

Country Link
US (1) US5305579A (en)
EP (1) EP0548463B1 (en)
AT (1) ATE129473T1 (en)
CA (1) CA2085332C (en)
DE (2) DE4141253A1 (en)

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DE19537792C1 (en) * 1995-10-11 1997-04-10 Chronos Richardson Gmbh Assembly to spread and fill flat sacks
DE19604718C1 (en) * 1996-02-09 1997-09-04 Chronos Richardson Gmbh System for picking up, splaying out and placing especially plastic sacks onto filler nozzle
US6023637A (en) * 1997-03-31 2000-02-08 Liu; Zhong Qi Method and apparatus for thermal radiation imaging
DE19740851A1 (en) * 1997-09-17 1999-03-18 Chronos Richardson Gmbh Device for separating sacks
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CN103204270B (en) * 2013-04-12 2016-05-04 安徽永成电子机械技术有限公司 A kind of bag detent mechanism of grabbing with clamping device
CN103342175A (en) * 2013-07-27 2013-10-09 枣庄市三维技术有限公司 Powder material automatic bagging manipulator
EP3199461B1 (en) * 2016-01-28 2018-07-18 Girnet Internacional, S.L. Device and method for assisting in the filling and closing operation of a package and station for filling and closing a package in a packaging machine which comprises said device
IT201900000046A1 (en) * 2019-01-03 2020-07-03 B & B Di Borsoi Michele APPARATUS FOR THE HANDLING OF BAG ENVELOPES
CN110116830A (en) * 2019-05-21 2019-08-13 广东大市智能装备有限公司 A kind of intelligence encapsulation stacking machine
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Also Published As

Publication number Publication date
DE4141253A1 (en) 1993-06-17
CA2085332C (en) 1999-09-07
DE59204135D1 (en) 1995-11-30
EP0548463B1 (en) 1995-10-25
CA2085332A1 (en) 1993-06-15
ATE129473T1 (en) 1995-11-15
US5305579A (en) 1994-04-26

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