EP0562274B1 - Device for filling bags open on one side - Google Patents

Device for filling bags open on one side Download PDF

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Publication number
EP0562274B1
EP0562274B1 EP93102557A EP93102557A EP0562274B1 EP 0562274 B1 EP0562274 B1 EP 0562274B1 EP 93102557 A EP93102557 A EP 93102557A EP 93102557 A EP93102557 A EP 93102557A EP 0562274 B1 EP0562274 B1 EP 0562274B1
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EP
European Patent Office
Prior art keywords
grippers
bags
apart
filling
frame
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP93102557A
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German (de)
French (fr)
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EP0562274A1 (en
Inventor
Helmut Hüwelmann
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Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Publication of EP0562274A1 publication Critical patent/EP0562274A1/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
    • B65B43/42—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation
    • B65B43/54—Means for supporting containers or receptacles during the filling operation

Definitions

  • the invention relates to a device for filling sacks that are open on one side, preferably provided with gussets, according to the preamble of claim 1.
  • the sacks are filled via the filler neck with a previously weighed predetermined filling quantity, so that due to the filling of the sacks with a net filling quantity, the sacks attached to the pair of grippers are weighed during filling is not required.
  • the object of the invention is therefore to provide a device of the type specified at the outset, with which the net target weights of the filling quantities can be achieved with good accuracy even when the bags are grossly weighed while they are being filled to let.
  • this object is achieved in a device of the type specified at the outset by the characterizing features of claim 1.
  • the devices for holding the sack are thus attached to or supported on a weighing device, so that the dead weights weighed during gross weighing can be kept as low as possible.
  • the relative weighing error resulting from the total weighed weight can be kept small, so that the sacks or bags can also be filled with the desired filling quantity if poorly flowing or highly viscous Fill goods are filled.
  • the filler neck is expediently provided with a closure device at its lower region, so that the filling process can be interrupted when the weighing that takes place during the filling shows the desired weight of the filling or, taking into account the wake of the filling quantity, the desired target Weight is just reached.
  • the bags filled with the device according to the invention can be closed in the usual way after filling. If the filled sacks or bags are made of thermoplastic plastic film, the opening edges, which are pulled together by tightening, can be connected to one another by means of a transverse weld seam. A closure can also be done by folding over the opening edges and closing with transverse sewing seams, for example after putting on a rider tape.
  • the weighing device expediently consists of a pressure measuring device, by means of which the support device is supported in the frame.
  • a pressure measuring device by means of which the support device is supported in the frame.
  • two or three load cells can be provided, via which the like or from a cross member. supports existing support on the frame.
  • the grippers of the pair of grippers which can be moved towards and away from one another, can each consist of two parallel link arms articulated on the carrying device, which form a four-bar system with the grippers, the four-bar systems being pivotable by pressure medium-piston-cylinder units, for example pneumatic cylinders .
  • expansion flaps can also be provided.
  • the gripper pairs holding the sack during filling are mounted on a carrier or frame 1 which is supported on the frame of the filling device via pressure or load cells 2.
  • Parallelogram linkages 3 and 4 are pivotally connected to the frame and each carry a pair of holding and expanding pliers 5 and 6 at their lower ends.
  • the pairs of holding and expanding pliers can be moved towards and away from one another via piston-cylinder units 7 and 8 which are connected to the parallelogram rods 3 and 4 and which are fastened to the frame 1.
  • a sack 9 gripped by the holding and expanding pliers pairs 5 and 6 is drawn up laterally by suction devices 11 in the area of a filling funnel 10, the holding and expanding pliers pairs 5 and 6 being moved towards one another. After opening the sack 9 at the upper filling edge, the filling tube 10 lowers into the sack, whereupon the suction cups 11 can detach from the sack.
  • the filling tube 10 is assigned, preferably in its lower area, a valve, not shown, which valve the filling tube 10 closes at the moment when the pressure cell 2 indicates a predetermined weight for the sack 9 and its contents. Thereafter, the filling pipe 10 is raised, whereupon the holding and expanding pliers pairs 5 and 6 are moved away from one another in order to close the opening edge. At this point, the pairs of transport tongs 12 and 13 have also moved up, which can grip the bag 9 and remove it after the pairs of holding and spreading tongs 5 and 6 have opened. If it is carried out in this exemplary embodiment that the pairs of pliers 12 and 13 serve to remove a filled sack 9 ', an empty sack is transported into the area of the holding and spreading pair 5 and 6 by a pair of transport pliers (not shown).
  • the holding and spreading pliers 5, 6 consist of clamp strips that open and close like pliers, which can be pivoted about transverse axes lying approximately in the pivoting plane of the parallelogram rods 3, 4.
  • the holding and spreading tongs 5, 6 and their drive devices are of a known type and are therefore not described in detail here.

Abstract

Bags open on one side and preferably provided with side folds are grasped on their side region, in the region of their orifice edges, by pairs of grippers, the grippers of which can be moved towards and away from one another. The side walls of the bags are drawn apart between the grippers, in the region of the orifice edges, by pairs of suckers arranged in a frame of the device. Filling connections which can lower and raise the opened bags are arranged in the frame. A closing device closes the bag orifice edges which are tautened by moving the grippers apart from one another and which are thereby laid one on top of the other. So that the desired net weights of the filling quantity can be recorded with high accuracy, the pair of grippers (5, 6) and the drive device for its opening and closing movements and for moving the grippers towards and away from one another are arranged on a supporting device (1, 1'), which supporting devices (1, 1') are connected to the frame via weighing devices (2). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Befüllen einseitig offener, vorzugsweise mit Seitenfalten versehener, Säcke nach dem Oberbegriff des Anspruchs 1.The invention relates to a device for filling sacks that are open on one side, preferably provided with gussets, according to the preamble of claim 1.

Bei einer aus EP-A-290 879 bekannten Vorrichtung der eingangs angegebenen Art werden die Säcke über den Füllstutzen mit einer vorher verwogenen vorbestimmten Füllmenge gefüllt, so daß wegen der Befüllung der Säcke mit einer Netto-Füllmenge eine Verwiegung der an das Greiferpaar angehängten Säcke während des Befüllens nicht erforderlich ist. Diese Art der Befüllung der Säcke mit einer netto-verwogenen Füllmenge ist jedoch nicht möglich, wenn die Säcke mit schlecht fließenden Füllgütern, beispielsweise mit flüssigen Füllgütern höherer Viskosität, gefüllt werden, weil bei derartigen Füllgütern diese dazu neigen, an dem Füllstützen oder an den der Befüllung dienenden Führungseinrichtungen anzuhaften, so daß bei Aufgabe einer Nettofüllmenge durch den Füllstutzen sich nicht sagen läßt, inwieweit diese Füllmenge vollständig auch in den zu befüllenden Sack oder Beutel gelangt.In a device of the type specified in EP-A-290 879, the sacks are filled via the filler neck with a previously weighed predetermined filling quantity, so that due to the filling of the sacks with a net filling quantity, the sacks attached to the pair of grippers are weighed during filling is not required. However, this type of filling of the bags with a net-weighed filling quantity is not possible if the bags are filled with poorly flowing filling goods, for example with liquid filling goods of higher viscosity, because with such filling goods these tend to be on the filling supports or on the Filling guiding devices to adhere, so that when a net fill quantity is given through the filler neck, it is impossible to say to what extent this fill quantity completely enters the sack or bag to be filled.

Ist eine Befüllung der Säcke oder Beutel mit einer vorher verwogenen Netto-Füllmenge nicht möglich, muß eine sog. Brutto-Verwiegung erfolgen, was bedeutet, daß die Säcke während ihres Befüllens mit dem Füllgut gewogen und solange befüllt werden, bis die Verwiegung die gewünschte Füllmenge anzeigt.If it is not possible to fill the sacks or bags with a previously weighed net filling quantity, a so-called gross weighing must be carried out, which means that the sacks are weighed while they are being filled with the contents and are filled until the weighing unit reaches the desired filling quantity displays.

Aus DE-PS 499 716, BE-A-1000561 und der US-PS 2 546 193 sind Füllvorrichtungen für Sacke mit Brutto-Verwiegung der Füllmenge bekannt, bei denen jedoch zusätzlich zu den Halteeinrichtungen für die zu befüllenden Säcke die gesamte Fülltrichter-Anordnung in das mitverwogene Totgewicht eingeht. Aus diesem Grunde läßt sich bei diesen bekannten Vorrichtungen der unvermeidbare relative Meßfehler während der Verwiegung nicht so klein halten, daß die Absolut-Fehler der Soll-Füllmenge in dem gewünschten kleinen und daher vernachlässigbaren Bereich gehalten werden können.From DE-PS 499 716, BE-A-1000561 and US-PS 2 546 193 filling devices for sacks with gross weighing of the filling quantity are known, but in which, in addition to the holding devices for the sacks to be filled, the entire hopper arrangement in the weighed dead weight enters. For this reason, the unavoidable relative measurement error during weighing cannot be kept so small in these known devices that the absolute errors of the target filling quantity can be kept in the desired small and therefore negligible range.

Aufgabe der Erfindung ist es daher, eine Vorrichtung der eingangs angegebenen Art zu schaffen, mit der sich auch bei einer Brutto-Verwiegung der Säcke während ihres Befüllens die Netto-Soll-Gewichte der Füllmengen mit guter Genauigkeit erreichen lassen.The object of the invention is therefore to provide a device of the type specified at the outset, with which the net target weights of the filling quantities can be achieved with good accuracy even when the bags are grossly weighed while they are being filled to let.

Erfindungsgemäß wird diese Aufgabe bei einer Vorrichtung der eingangs angegebenen Art durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Bei der erfindungsgemäßen Vorrichtung sind somit nur die Einrichtungen zum Halten des Sackes an eine Wiegeeinrichtung angehängt oder auf diese abgestützt, so daß die bei der Brutto-Verwiegung mitgewogenen Totgewichte so gering wie möglich gehalten werden können. Somit kann bei der erfindungsgemäßen Vorrichtung selbst bezogen auf die Netto-Füllmenge der sich aus dem gesamten verwogenen Gewicht ergebende relative Wiegefehler klein gehalten werden, so daß sich die Säcke oder Beutel auch dann mit der gewünschten Füllmenge verfüllen lassen, wenn in diese schlecht fließende oder hochviskose Füllgüter eingefüllt werden. Bei der erfindungsgemäßen Vorrichtung ist zweckmäßigerveise der Füllstutzen an seinem unteren Bereich mit einer Verschlußeinrichtung versehen, so daß der Füllvorgang unterbrochen werden kann, wenn die während des Verfüllens erfolgende Verwiegung das Soll-Gewicht der Füllung anzeigt oder unter Berücksichtigung des Nachlaufes der Füllmenge das gewünschte Soll-Gewicht gerade erreicht wird.According to the invention, this object is achieved in a device of the type specified at the outset by the characterizing features of claim 1. In the device according to the invention, only the devices for holding the sack are thus attached to or supported on a weighing device, so that the dead weights weighed during gross weighing can be kept as low as possible. Thus, in the device according to the invention, even based on the net filling quantity, the relative weighing error resulting from the total weighed weight can be kept small, so that the sacks or bags can also be filled with the desired filling quantity if poorly flowing or highly viscous Fill goods are filled. In the device according to the invention, the filler neck is expediently provided with a closure device at its lower region, so that the filling process can be interrupted when the weighing that takes place during the filling shows the desired weight of the filling or, taking into account the wake of the filling quantity, the desired target Weight is just reached.

Die mit der erfindungsgemäßen Vorrichtung verfüllten Säcke können nach ihrer Befüllung in üblicher Weise verschlossen werden. Handelt es sich bei den befüllten Säcken oder Beuteln um solche aus thermoplastischem Kunststoffolie, können die durch Straffziehen aneinander gelegte Öffnungsränder durch eine Querschweißnaht miteinander verbunden werden. Ein Verschluß kann auch durch Umfalten der Öffnungsränder und Verschließen mit querverlaufenden Näh-Nähten, beispielsweise nach Aufsetzen eines Reiterbandes, erfolgen.The bags filled with the device according to the invention can be closed in the usual way after filling. If the filled sacks or bags are made of thermoplastic plastic film, the opening edges, which are pulled together by tightening, can be connected to one another by means of a transverse weld seam. A closure can also be done by folding over the opening edges and closing with transverse sewing seams, for example after putting on a rider tape.

Zweckmäßigerweise besteht die Wiegeeinrichtung aus einer Druckmeßeinrichtung, über die die Trageinrichtung in dem Gestell abgestützt ist. Beispielsweise können zwei oder drei Druckmeßdosen vorgesehen sein, über die sich die aus einem Querträger o.dgl. bestehende Trageinrichtung auf dem Gestell abstützt.The weighing device expediently consists of a pressure measuring device, by means of which the support device is supported in the frame. For example, two or three load cells can be provided, via which the like or from a cross member. supports existing support on the frame.

Die die Greifer des Greiferpaares aufeinander zu- und voneinander wegbewegbare Antriebseinrichtung kann aus jeweils zwei an der Trageinrichtung angelenkten Parallellenkern bestehen, die mit den Greifern ein Viergelenksystem bilden, wobei die Viergelenksysteme durch Druckmittel-Kolben-Zylinder-Einheiten, beispielsweise Pneumatik-Zylindern, verschwenkbar sind.The grippers of the pair of grippers, which can be moved towards and away from one another, can each consist of two parallel link arms articulated on the carrying device, which form a four-bar system with the grippers, the four-bar systems being pivotable by pressure medium-piston-cylinder units, for example pneumatic cylinders .

Statt spezieller Trichterklappen können auch Spreizklappen vorgesehen sein.Instead of special funnel flaps, expansion flaps can also be provided.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert. Diese zeigt eine Seitenansicht einer Brutto-Verwiegeeinrichtung einer Sack- oder Beutelfüllvorrichtung mit Füllrohr in schematischer Darstellung undAn embodiment of the invention is explained below with reference to the drawing. This shows a side view of a gross weighing device of a sack or bag filling device with a filling tube in a schematic representation and

Bei der gezeigten Vorrichtung sind die den Sack während des Befüllens haltenden Greiferpaare an einem Träger oder Rahmen 1 gelagert, der sich über Druck- oder Kraftmeßdosen 2 auf dem Gestell der Füllvorrichtung abstützt.In the device shown, the gripper pairs holding the sack during filling are mounted on a carrier or frame 1 which is supported on the frame of the filling device via pressure or load cells 2.

Mit dem Rahmen sind Parallelogrammgestänge 3 und 4 schwenkbar verbunden, die an ihren unteren Enden jeweils ein Halte- und Spreizzangenpaar 5 bzw. 6 tragen. Über mit den Parallelogrammgestängen 3 und 4 verbundene Kolbenzylindereinheiten 7 und 8, welche am Rahmen 1 befestigt sind, können die Halte- und Spreizzangenpaare aufeinander zu- und voneinander wegbewegt werden. Ein von den Halte- und Spreizzangenpaaren 5 und 6 ergriffener Sack 9 wird im Bereich eines Fülltrichters 10 seitlich von Saugern 11 aufgezogen, wobei die Halte- und Spreizzangenpaare 5 und 6 aufeinander zubewegt werden. Nach dem Öffnen des Sackes 9 am oberen Einfüllrand senkt sich das Füllrohr 10 in den Sack hinein, woraufhin sich die Sauger 11 vom Sack lösen können. Dem Füllrohr 10 ist, vorzugsweise in seinem unteren Bereich, ein nicht dargestelltes Ventil zugeordnet, welches das Füllrohr 10 in dem Moment abschließt, wo die Druckmessdose 2 ein vorbestimtes Gewicht für den Sack 9 samt Inhalt anzeigen. Danach wird das Füllrohr 10 angehoben, woraufhin die Halte- und Spreizzangenpaare 5 und 6 voneinander wegbewegt werden, um den Öffnungsrand zu schließen. Zu diesem Zeitpunkt sind auch die Transportzangenpaare 12 und 13 herangefahren, die den Sack 9 ergreifen und abtransportieren können, nachdem die Halte- und Spreizzangenpaare 5 und 6 geöffnet haben. Wenn in diesem Ausführungsbeispiel ausgeführt ist, daß die Zangenpaare 12 und 13 zum Abtransport eines gefüllten Sackes 9' dienen, so wird ein leerer Sack durch ein nicht dargestelltes Transportzangenpaar in den Bereich der Halte- und Spreizzangenpaare 5 und 6 transportiert.Parallelogram linkages 3 and 4 are pivotally connected to the frame and each carry a pair of holding and expanding pliers 5 and 6 at their lower ends. The pairs of holding and expanding pliers can be moved towards and away from one another via piston-cylinder units 7 and 8 which are connected to the parallelogram rods 3 and 4 and which are fastened to the frame 1. A sack 9 gripped by the holding and expanding pliers pairs 5 and 6 is drawn up laterally by suction devices 11 in the area of a filling funnel 10, the holding and expanding pliers pairs 5 and 6 being moved towards one another. After opening the sack 9 at the upper filling edge, the filling tube 10 lowers into the sack, whereupon the suction cups 11 can detach from the sack. The filling tube 10 is assigned, preferably in its lower area, a valve, not shown, which valve the filling tube 10 closes at the moment when the pressure cell 2 indicates a predetermined weight for the sack 9 and its contents. Thereafter, the filling pipe 10 is raised, whereupon the holding and expanding pliers pairs 5 and 6 are moved away from one another in order to close the opening edge. At this point, the pairs of transport tongs 12 and 13 have also moved up, which can grip the bag 9 and remove it after the pairs of holding and spreading tongs 5 and 6 have opened. If it is carried out in this exemplary embodiment that the pairs of pliers 12 and 13 serve to remove a filled sack 9 ', an empty sack is transported into the area of the holding and spreading pair 5 and 6 by a pair of transport pliers (not shown).

Die Halte- und Spreizzangen 5, 6 bestehen aus zangenartig sich öffnenden und schließenden Klemmleisten, die um etwa in der Schwenkebene der Parallelogrammgestänge 3, 4 liegende Querachsen schwenkbar sind. Die Halte- und Spreizzangen 5, 6 sowie deren Antriebseinrichtungen sind bekannter Bauart und werden daher hier nicht näher beschrieben.The holding and spreading pliers 5, 6 consist of clamp strips that open and close like pliers, which can be pivoted about transverse axes lying approximately in the pivoting plane of the parallelogram rods 3, 4. The holding and spreading tongs 5, 6 and their drive devices are of a known type and are therefore not described in detail here.

Claims (3)

  1. Device for filling bags (9, 9') which are open on one side and are preferably provided with side gussets, having a pair of grippers (5, 6) which seize the bags (9, 9') in the region of their opening edges, at their side regions, and the grippers (5, 6) of which respectively comprise clamping bars opening and closing in the manner of pliers and are able to move together and apart for opening and drawing together the edge of the bag; having a device which holds apart the side walls of the bags (9, 9') in the region of the opening edges between the grippers (5, 6), preferably a pair of suckers (11) which draw the side walls apart and are arranged in a frame of the device; having a filler nozzle (10) which is arranged in the frame and can be lowered into the opened bags (9, 9') and raised; and having a sealing means which uses transverse seams to seal together the opening edges of the bags (9, 9') drawn tight by moving the grippers (5, 6) apart, and thereby lying one on top of the other; characterized in that there is provided a means just for carrying the pair of grippers (5, 6) and the driving means for the opening and closing movements of the latter and for moving the grippers (5, 6) together and apart, which means is connected to the frame via a weighing means (2) just for this carrying means.
  2. Device according to Claim 1, characterized in that the weighing means comprise pressure-measuring means (2), by which the carrying means (1, 1') are supported in the frame.
  3. Device according to Claim 1 or 2, characterized in that the driving means which can move the grippers (5, 6) of the pair of grippers together and apart respectively comprise two parallel links (3, 4), which are articulated on the carrying means (1, 1') and with the grippers (5, 6) form a four-bar system, and in that the four-bar systems are able to be swivelled by pressure medium/piston/cylinder units (7, 8).
EP93102557A 1992-03-23 1993-02-18 Device for filling bags open on one side Expired - Lifetime EP0562274B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE9203879 1992-03-23
DE9203879U 1992-03-23
DE9207679U DE9207679U1 (en) 1992-03-23 1992-06-05
DE9207679U 1992-06-05

Publications (2)

Publication Number Publication Date
EP0562274A1 EP0562274A1 (en) 1993-09-29
EP0562274B1 true EP0562274B1 (en) 1997-06-04

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EP93102557A Expired - Lifetime EP0562274B1 (en) 1992-03-23 1993-02-18 Device for filling bags open on one side

Country Status (8)

Country Link
US (1) US5375396A (en)
EP (1) EP0562274B1 (en)
JP (1) JP3609844B2 (en)
AT (1) ATE153939T1 (en)
BR (1) BR9301256A (en)
CA (1) CA2091471A1 (en)
DE (2) DE9207679U1 (en)
ES (1) ES2103388T3 (en)

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JP3609844B2 (en) 2005-01-12
ES2103388T3 (en) 1997-09-16
CA2091471A1 (en) 1993-09-24
EP0562274A1 (en) 1993-09-29
ATE153939T1 (en) 1997-06-15
DE9207679U1 (en) 1992-08-27
US5375396A (en) 1994-12-27
DE59306628D1 (en) 1997-07-10
JPH0640433A (en) 1994-02-15
BR9301256A (en) 1993-09-28

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