EP0380905B1 - Single bag feeding device - Google Patents

Single bag feeding device Download PDF

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Publication number
EP0380905B1
EP0380905B1 EP89890298A EP89890298A EP0380905B1 EP 0380905 B1 EP0380905 B1 EP 0380905B1 EP 89890298 A EP89890298 A EP 89890298A EP 89890298 A EP89890298 A EP 89890298A EP 0380905 B1 EP0380905 B1 EP 0380905B1
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EP
European Patent Office
Prior art keywords
sack
deposit
place
hoisting device
accordance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89890298A
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German (de)
French (fr)
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EP0380905A1 (en
Inventor
Adolf Gradwohl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Binder and Co AG
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Binder and Co AG
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Publication date
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Publication of EP0380905A1 publication Critical patent/EP0380905A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/12—Feeding flexible bags or carton blanks in flat or collapsed state; Feeding flat bags connected to form a series or chain
    • B65B43/14—Feeding individual bags or carton blanks from piles or magazines
    • B65B43/16—Feeding individual bags or carton blanks from piles or magazines by grippers
    • B65B43/18—Feeding individual bags or carton blanks from piles or magazines by grippers by suction-operated grippers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/191—Bags, sachets and pouches or the like

Definitions

  • the invention relates to a device for feeding a singular sack from a storage area to a filling station with a closable filling funnel, in which a transport device provided with suction devices for opening and grasping the sack is provided, followed by a pulling device for pulling the sack onto the closable filling funnel is.
  • the bags are usually placed individually on a rigid shelf and from there are conveyed further by means of the transport device provided with suction devices in the direction of closable filling funnel or pulling device.
  • the bags slide off the shelf and bend downwards. This leads to the sack reaching the pulling device at an unfavorable angle, which is usually arranged pivotably about a horizontal axis.
  • a bag feed device with a movable shelf is also known.
  • the movement of the tray serves to transfer the sack to the transport device.
  • the aim of the invention is to remedy the shortcomings of the known devices and to propose a device of the type mentioned at the beginning in which a symmetrical opening of the bag is ensured, in particular when the bag is transferred to the pull-up device.
  • this is achieved in that the transport device provided with the suction devices and the tray are coupled to one another in a movement-locking manner, so that each sack is at least partially supported during transport to the pull-up device.
  • the pulling device which is optionally provided with expandable holding devices for receiving the sacks, is arranged so as to be pivotable about a horizontal axis
  • the transport device provided with the suction cups and the tray can be pivoted, preferably pivotable about a common axis are arranged.
  • the tray in its end position closer to the pulling device, be seen from its trailing edge in the transport direction of the bags, trailing down towards its leading edge and essentially tangential to the position of the pulling device or its holding members in its takeover position.
  • the support has an extension in the transport direction of the sack which corresponds essentially to half the length or height of the sack.
  • the sacks 2 are stacked in the magazine 1, the individual sacks 2 or smaller packages of sacks being arranged laterally offset, as can be seen from FIG. 2.
  • the stack of sacks 2 can always be held in a position by means of the bottom 5 which can be raised and lowered, in which the uppermost sack 2 is located in a position near the upper end of the magazine 1.
  • a chain grate 6 runs around the magazine via deflection wheels 11, one or a pair of which is driven.
  • This chain grate 6 serves to transport the bags 2 in the direction of the predetermined transfer position 7 and is provided with grate fields 8, in which the two chains are connected with grate bars 10, which are separated from one another by sections 9, in which no grate bars 10 are arranged .
  • These sections 9 are expediently dimensioned longer than the magazine in the transport direction of the chain grate 6.
  • a removal device 12 is arranged above the magazine and is essentially formed by a lever which can be moved by means of a cylinder-piston device and which carries a suction head 13 at its free end.
  • the removal device 12 is controlled in such a way that the angle lever engages with its suction head 13 through the chain grate 6, while a section 9 passes underneath the removal device 12 without grate bars.
  • the top sack 2 of the magazine 1 can be raised and brought with its one end into a position above the chain grate 6.
  • the subsequent grate field 8 lifts, as can be seen from FIG. 1, the sack 2 raised at one end over its entire length, after which the suction head 13 is relaxed, so that the end of the sack 2 falls onto the chain grate and from it is taken away.
  • the chain grate 6 pushes the sack 2 to a further transport device 14, which is essentially formed by a plurality of circumferential belts 15, one strand of which runs just above a table 16. These belts 15 are driven intermittently, with a sensor device (not shown) in conjunction with a control device (also not shown) ensuring that the drive is stopped and the isolated sack 2 lies in the position shown in full lines in FIG. 1 is coming.
  • a device for aligning the Sackes activated transversely to the table 16 which is essentially formed by two pairs of stops 40, 40 ', 41, 41', the two pairs of stops being movable against one another. These stops are formed by corresponding slots in the table 16 passing through fingers, the drive of which is controlled by a control device controlled by sensors (not shown) which respond to a bag 2.
  • a sack 2 is gripped by a further transport device 17, the sack 2 in the embodiment shown partly on the table 16, or the stopped belt 15 and partly in an end position shown in full lines on the table 16 subsequent tray 18 rests.
  • the sack 2 protrudes somewhat beyond the edge 19 of the tray facing away from the table 16, which edge, as seen in the transport direction of the sack, runs forward.
  • the transport device 17 engages with its suction devices 20, with which it grips the bag 2 and at the same time opens the bag 2 by increasing the distance between the suction devices 20.
  • suction cups 20 are held in a frame, not shown, which is held pivotably about an axis 22 via a pair of angled arms 21, this axis running parallel to the plane of the shelf 18.
  • the axis 22 is arranged in the vertical direction lower than the tray 18 and in the horizontal direction closer to the mounting device 30 than the edge 23 of the tray 18 trailing in the transport direction of the bags 2 in its end position closest to the table 16.
  • the axis 22 lies further away from the pull-up device 30 in the horizontal direction than the edge 19 of the tray 18 leading in the transport direction of the bags 2 in its end position approximated to the pull-up device 30.
  • a cylinder-piston arrangement 24 is provided, with which the transport device can be pivoted between the table 16 and the pull-up device 30, the bag 2 remaining open during the pivoting of the transport device in the direction of the pull-up device 30.
  • the mounting device 30 essentially consists of two spreading arms 33 which can be pivoted about an axis 32 which runs parallel to the opening plane of the closable hopper 31 and parallel to the pivot axis 22, which are essentially mutually movable parallel to the axis 32 and carry spoons 34 at their free ends, with which the gussets of the bags 2 are pressed outwards.
  • the spoons 34 of the pulling device 30 engage in the opening of a sack 2 or the sack 2 is pulled over them by means of the transport device 17, these are spread apart, so that the sack is held by the spoons 34. Thereafter, the suction heads 20 of the transport device 17 can be relaxed so that they release the sack 2, after which the transport device 17 can be pivoted back into its starting position, in which it is approximated to the table 16.
  • the puller 30 now pivots towards the closable hopper 31 and thereby pushes the bag 2 over the closable hopper 31, after which the clamping devices 35 can be pressed against it, with which the walls of the bag 2 are pressed against the outer sides of the closable hopper 31. Thereafter, the pulling device 30 pivots further upward, whereby the spoons 34 are pulled out of the bag 2.
  • the puller 30 pivots again into its takeover position shown in full lines, in which the spoons 34 are inserted into the next sack, the spoons 34 reducing their mutual distance during the swinging back.
  • the position of the pivot axes 22 and 32, and the length of the respective arms 21 and 33 are chosen so that the tray 18, which is part of the transport device 17, is substantially tangent to the circular arc described by the spoons 34 in the transfer position of the transport device 17th and the winding device 30 extends.
  • the tray 18 itself does not need to support the sack 2 over its entire length or height, it is sufficient to as shown in Fig. 1, if this is about half as long as the sack 2. Any kinking of the sack over the trailing edge 23 of the tray 18 is not disturbing, since the sack 2 is supported in the area of the sack opening and the side gussets of the sack are therefore opened symmetrically. This enables the bag 2 to be taken over smoothly by the pulling device 30, which enables the bag 2 to be pulled onto the closable filling funnel 31 properly. The latter is again required for proper filling of the sack so that it can be closed without wrinkles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)

Description

Die Erfindung bezieht sich auf eine Einrichtung zum Zuführen eines vereinzelten Sackes von einer Ablage zu einer Füllstation mit einem verschließbaren Fülltrichter bei der ein mit Saugeinrichtungen zum Öffnen und Erfassen des Sackes versehene Transporteinrichtung vorgesehen ist, der eine Aufzieheinrichtung zum Aufziehen des Sackes auf den verschließbaren Fülltrichter nachgeordnet ist.The invention relates to a device for feeding a singular sack from a storage area to a filling station with a closable filling funnel, in which a transport device provided with suction devices for opening and grasping the sack is provided, followed by a pulling device for pulling the sack onto the closable filling funnel is.

Bei bekannten derartigen z.B. in FR-A-2252957 beschriebenen und im Oberbegriff des Patentanspruchs 1 berücksichtigten Einrichtungen werden die Säcke meist vereinzelt auf eine starre Ablage abgelegt und von dort aus mit der mit Saugern versehenen Transporteinrichtung weiter in Richtung verschließbarer Fülltrichter, bzw. Aufzieheinrichtung befördert. Dabei rutschen die Säcke von der Ablage und biegen sich dabei nach unten durch. Dies führt dazu, daß der Sack in einem ungünstigen Winkel zur Aufzieheinrichtung gelangt, die meist um eine horizontale Achse schwenkbar angeordnet ist. Bei Seitenfaltensäcken kommt es aufgrund der eingelegten Seitenfalten auch häufig vor, daß lediglich die untere Wand des Sackes sich durchbiegt, wogegen, die obere, die wegen der eingelegten Seitenfalten eher eine Tendenz zeigt, sich nach oben zu wölben, den sich vergrößernden Abstand zwischen der Vorderkante der Ablage und den Saugern der Transporteinrichtung überbrückt. Dies führt zu einer sehr ungleichmäßigen Öffnung der Seitenfalten, was in weiterer Folge zu Problemen mit der Erfassung des Sackes durch die Aufzieheinrichtung, welche symmetrisch erfolgen soll, führt.In known such e.g. In devices described in FR-A-2252957 and taken into account in the preamble of claim 1, the bags are usually placed individually on a rigid shelf and from there are conveyed further by means of the transport device provided with suction devices in the direction of closable filling funnel or pulling device. The bags slide off the shelf and bend downwards. This leads to the sack reaching the pulling device at an unfavorable angle, which is usually arranged pivotably about a horizontal axis. In the case of gusseted sacks, it often happens that only the lower wall of the sack bends due to the inserted gussets, whereas the upper one, which shows a tendency to bulge upwards due to the inserted gussets, the increasing distance between the front edge bridged the tray and the suction devices of the transport device. This leads to a very uneven opening of the side gussets, which subsequently leads to problems with the gripping of the sack by the pull-up device, which is to be carried out symmetrically.

Eine solche symmetrische Erfassung des Sackes durch die Aufziehvorrichtung, die meist durch in die Sacköffnung eingreifende aufspreizbare Löffel gebildet ist, die die Seitenfalten nach außen drücken, ist aber Voraussetzung, wenn der Sack zentrisch auf die Schurre aufgezogen werden soll. Dies ist wesentlich für ein faltenfreies maschinelles Verschließen des gefüllten Sackes.Such a symmetrical detection of the sack by the pull-up device, which is usually formed by spreading spoons which engage in the sack opening and push the side folds outwards, is a prerequisite if the sack is to be pulled centrally onto the chute. This is essential for a crease-free mechanical closing of the filled sack.

Aus der FR-A-2206725 ist auch eine Sackzuführungsvorrichtung mit einer beweglichen Ablage bekannt. Dabei dient die Bewegung der Ablage dazu, den Sack an die Transporteinrichtung zu übergeben.From FR-A-2206725 a bag feed device with a movable shelf is also known. The movement of the tray serves to transfer the sack to the transport device.

Ziel der Erfindung ist es, die Mängel der bekannten Einrichtungen zu beheben und eine Einrichtung der eingangs erwähnten Art vorzuschlagen, bei der ein symmetrisches Öffnen des Sackes sichergestellt ist, insbesondere bei der Übergabe des Sackes an die Aufzieheinrichtung.The aim of the invention is to remedy the shortcomings of the known devices and to propose a device of the type mentioned at the beginning in which a symmetrical opening of the bag is ensured, in particular when the bag is transferred to the pull-up device.

Erfindungsgemäß wird dies dadurch erreicht, daß die mit den Saugern versehene Transporteinrichtung und die Ablage miteinander bewegungsschlüssig gekoppelt sind, so daß jeder Sack beim Transport zur Aufzieheinrichtung zumindest teilweise unterstützt ist.According to the invention, this is achieved in that the transport device provided with the suction devices and the tray are coupled to one another in a movement-locking manner, so that each sack is at least partially supported during transport to the pull-up device.

Durch diese Maßnahmen ist sichergestellt, daß der Sack bis zur Übergabe an die Aufzieheinrichtung unterstützt ist und es daher nicht zu einem ungleichmäßigen Durchbiegen der Wände des Sackes kommen kann. Damit ist aber ein symmetrisches Erfassen des Sackes durch die Aufzieheinrichtung sichergestellt. Damit werden aber auch die oben angeführten Probleme vermieden.These measures ensure that the sack is supported until it is handed over to the pull-up device and therefore there can be no uneven bending of the walls of the sack. But this ensures a symmetrical grasping of the sack by the pulling device. This also avoids the problems mentioned above.

Dabei kann bei einer erfindungsgemäßen Einrichtung, bei der die gegebenenfalls mit spreizbaren Halteeinrichtungen zur Aufnahme der Säcke versehene Aufzieheinrichtung um eine horizontale Achse schwenkbar angeordnet ist, weiters vorgesehen sein, daß die mit den Saugern versehene Transporteinrichtung und die Ablage schwenkbar, vorzugsweise um eine gemeinsame Achse schwenkbar, angeordnet sind.In the case of a device according to the invention, in which the pulling device, which is optionally provided with expandable holding devices for receiving the sacks, is arranged so as to be pivotable about a horizontal axis, it can further be provided that the transport device provided with the suction cups and the tray can be pivoted, preferably pivotable about a common axis are arranged.

Auf diese Weise wird eine einfache Konstruktion erreicht.A simple construction is achieved in this way.

Weiters wird vorgeschlagen daß die Ablage in ihrer der Aufzieheinrichtung näheren Endlage von ihrer in Transportrichtung der Säcke gesehen, nachlaufenden Kante aus gegen ihre vorlaufende Kante zu nach unten geneigt ist und im wesentlichen tangential zur Stellung der Aufziehvorrichtung bzw. deren Halteorganen in deren Übernahmestellung verläuft.Furthermore, it is proposed that the tray, in its end position closer to the pulling device, be seen from its trailing edge in the transport direction of the bags, trailing down towards its leading edge and essentially tangential to the position of the pulling device or its holding members in its takeover position.

Durch diese Maßnahmen ist eine besonders reibungslose Übergabe der Säcke von der Transporteinrichtung zur Aufzieheinrichtung gewährleistet, wobei eine Umlenkung des Sackes im Bereich der Übergabe zur Aufzieheinrichtung vermieden wird.These measures ensure a particularly smooth transfer of the bags from the transport device to the pull-up device, with deflection of the bag in the area of the transfer to the pull-up device being avoided.

Um die angegebene Lage der Ablage in deren vorderer Endstellung zu gewahrleisten, kann weiters vorgesehen sein, daß die gegebenenfalls imaginäre(n) Schwenkachse(n) der Transporteinrichtung und der Ablage in vertikaler Richtung tiefer als die in der von der Aufzieheinrichtung entferntesten Endlage im wesentlichen horizontal liegende Ablage und in horizontaler Richtung weiter von der Aufzieheinrichtung entfernt ist, als die, in Transportrichtung des Sackes gesehen, vorlaufende Kante der Ablage in deren der Aufzieheinrichtung angenäherten Endlage.In order to ensure the specified position of the tray in its front end position, it can further be provided that the if necessary, imaginary (n) pivot axis (s) of the transport device and the storage device in the vertical direction lower than the storage device lying essentially horizontally in the end position furthest away from the pulling device and further away from the pulling device in the horizontal direction than that in the transport direction of the bag seen, leading edge of the shelf in its end position approximated to the mounting device.

Grundsätzlich wäre eine solche Lage der Ablage auch durch andere Maßnahmen, wie z.B. eine Führung der Ablage in vorbestimmten Bahnen möglich, doch ergibt sich in einem solchen Falle ein relativ hoher konstruktiver Aufwand.In principle, such a location of the filing would also be possible through other measures, such as the tray can be guided in predetermined paths, but in such a case there is a relatively high level of design complexity.

Um an Baulänge der Einrichtung zu sparen, kann weiters vorgesehen sein, daß die Auflage in Transportrichtung des Sackes eine Erstreckung aufweist, die im wesentlichen der halben Länge, bzw. Höhe des Sackes entspricht.In order to save on the overall length of the device, it can further be provided that the support has an extension in the transport direction of the sack which corresponds essentially to half the length or height of the sack.

In diesem Falle ist sichergestellt, daß der Sack im Bereich der Übergabe von der Transporteinrichtung zur Aufzieheinrichtung unterstützt ist, wodurch, wie bereits oben erläutert, ein symmetrisches Öffnen des Sackes sichergestellt ist. Ein allfälliges Abknicken des Sackes im Bereich der in Transportrichtung des Sackes nachlaufenden Kante der Ablage ist dabei ohne Belang und stört die Übergabe in keiner Weise.In this case it is ensured that the bag is supported in the area of the transfer from the transport device to the pulling device, which, as already explained above, ensures a symmetrical opening of the bag. Any kinking of the sack in the area of the edge of the shelf trailing in the transport direction of the sack is irrelevant and does not interfere with the transfer in any way.

Die Erfindung wird nun anhand der Zeichnung näher erläutert. Dabei zeigen:

  • Fig. 1 schematisch die erfindungsgemäße Einrichtung im Schnitt und
  • Fig. 2 die erfindungsgemäße Einrichtung in Draufsicht.
The invention will now be explained in more detail with reference to the drawing. Show:
  • Fig. 1 shows schematically the device according to the invention in section and
  • Fig. 2 shows the device according to the invention in plan view.

In dem Magazin 1 sind die Säcke 2 gestapelt, wobei die einzelnen Säcke 2 oder kleinere Pakete von Säcken seitlich versetzt angeordnet sind, wie dies aus der Fig. 2 zu ersehen ist.The sacks 2 are stacked in the magazine 1, the individual sacks 2 or smaller packages of sacks being arranged laterally offset, as can be seen from FIG. 2.

Der Stapel der Säcke 2 ist mittels des heb- und senkbaren Bodens 5 stets in einer Lage haltbar, in der sich der oberste Sack 2 in einer Lage nahe dem oberen Ende des Magazins 1 befindet.The stack of sacks 2 can always be held in a position by means of the bottom 5 which can be raised and lowered, in which the uppermost sack 2 is located in a position near the upper end of the magazine 1.

Um das Magazin läuft ein Kettenrost 6 über Umlenkräder 11 um, von denen eines, bzw. ein Paar angetrieben ist. Dieser Kettenrost 6 dient zum Transport der Säcke 2 in Richtung der vorgegebenen Übergabeposition 7 und ist mit Rostfeldern 8, in denen die beiden Ketten mit Roststäben 10 verbunden sind, versehen, die voneinander durch Abschnitte 9, in denen keine Roststäbe 10 angeordnet sind, getrennt sind. Dabei sind diese Abschnitte 9 zweckmäßigerweise länger als das Magazin in Transportrichtung des Kettenrostes 6 bemessen.A chain grate 6 runs around the magazine via deflection wheels 11, one or a pair of which is driven. This chain grate 6 serves to transport the bags 2 in the direction of the predetermined transfer position 7 and is provided with grate fields 8, in which the two chains are connected with grate bars 10, which are separated from one another by sections 9, in which no grate bars 10 are arranged . These sections 9 are expediently dimensioned longer than the magazine in the transport direction of the chain grate 6.

Oberhalb des Magazins ist eine Entnahmeeinrichtung 12 angeordnet, die im wesentlichen durch einen mittels einer Zylinder-Kolbeneinrichtung bewegbaren Hebel gebildet ist, der an seinem freien Ende einen Saugkopf 13 trägt. Dabei erfolgt die Steuerung der Entnahmeinrichtung 12 in der Weise, daß der Winkelhebel mit seinem Saugkopf 13 durch den Kettenrost 6 hindurchgreift, während ein Abschnitt 9 ohne Roststäbe unterhalb der Entnahmeeinrichtung 12 vorbeiläuft.A removal device 12 is arranged above the magazine and is essentially formed by a lever which can be moved by means of a cylinder-piston device and which carries a suction head 13 at its free end. The removal device 12 is controlled in such a way that the angle lever engages with its suction head 13 through the chain grate 6, while a section 9 passes underneath the removal device 12 without grate bars.

Mit diesem Saugkopf 13 kann der oberste Sack 2 des Magazins 1 angehoben umd mit seinem einen Ende in eine oberhalb des Kettenrostes 6 liegende Position gebracht werden.With this suction head 13, the top sack 2 of the magazine 1 can be raised and brought with its one end into a position above the chain grate 6.

Das nachfolgende Rostfeld 8 hebt, wie aus der Fig. 1 zu ersehen ist, den an seinem einen Ende angehobenen Sack 2 über dessen geamte Länge an, wonach der Saugkopf 13 entspannt wird, sodaß das Ende des Sackes 2 auf den Kettenrost fällt und von diesem mitgenommen wird.The subsequent grate field 8 lifts, as can be seen from FIG. 1, the sack 2 raised at one end over its entire length, after which the suction head 13 is relaxed, so that the end of the sack 2 falls onto the chain grate and from it is taken away.

Der Kettenrost 6 schiebt den Sack 2 zu einer weiteren Transporteinrichtung 14, die im wesentlichen durch mehrere umlaufende Riemen 15 gebildet ist, deren eine Trume knapp oberhalb eines Tisches 16 verlaufen. Der Antrieb dieser Riemen 15 erfolgt intermittierend, wobei durch eine nicht dargestellte Fühleinrichtung in Verbindung mit einer ebenfalls nicht dargestellten Steuereinrichtung dafür gesorgt ist, daß der Antrieb stillgesetzt wird und der vereinzelte Sack 2 in der in der Fig. 1 mit vollen Linien dargestellten Lage zu liegen kommt.The chain grate 6 pushes the sack 2 to a further transport device 14, which is essentially formed by a plurality of circumferential belts 15, one strand of which runs just above a table 16. These belts 15 are driven intermittently, with a sensor device (not shown) in conjunction with a control device (also not shown) ensuring that the drive is stopped and the isolated sack 2 lies in the position shown in full lines in FIG. 1 is coming.

Nachdem der vereinzelte Sack 2 durch die Stillsetzung des Antriebes der Riemen 15 zum Stillstand gekommen ist, wird eine, aus der Fig. 2 ersichtliche Einrichtung zur Ausrichtung des Sackes quer zum Tisch 16 aktiviert, die im wesentlichen durch zwei Paare von Anschlägen 40, 40′, 41, 41′ gebildet ist, wobei die beiden Paare von Anschlägen gegeneinander bewegbar sind. Diese Anschläge sind durch entsprechende Schlitze des Tisches 16 durchsetzende Finger gebildet, deren Antrieb über eine durch nicht dargestellte, auf einen Sack 2 ansprechende Fühler gesteuerte Steuereinrichtung gesteuert ist.After the isolated sack 2 has come to a standstill due to the stopping of the drive of the belt 15, a device for aligning the Sackes activated transversely to the table 16, which is essentially formed by two pairs of stops 40, 40 ', 41, 41', the two pairs of stops being movable against one another. These stops are formed by corresponding slots in the table 16 passing through fingers, the drive of which is controlled by a control device controlled by sensors (not shown) which respond to a bag 2.

In dieser vereinzelten Lage wird jeweils ein Sack 2 von einer weiteren Transporteinrichtung 17 erfaßt, wobei der Sack 2 bei der dargestellten Ausführungsform teilweise auf dem Tisch 16, bzw. den stillgesetzten Riemen 15 und teilweise auf einer in der mit vollen Linien dargestellten Endlage an den Tisch 16 anschließenden Ablage 18 aufliegt. Dabei ragt der Sack 2 etwas über die vom Tisch 16 abgekehrten Kante 19 der Ablage vor, welche Kante in Transportrichtung des Sackes gesehen vorläuft.In this isolated position, a sack 2 is gripped by a further transport device 17, the sack 2 in the embodiment shown partly on the table 16, or the stopped belt 15 and partly in an end position shown in full lines on the table 16 subsequent tray 18 rests. Here, the sack 2 protrudes somewhat beyond the edge 19 of the tray facing away from the table 16, which edge, as seen in the transport direction of the sack, runs forward.

An diesem vorragenden Abschnitt des Sackes 2 greift die Transporteinrichtung 17 mit ihren Saugern 20 an, mit denen sie den Sack 2 erfaßt und gleichzeitig durch Vergrößerung des Abstandes zwischen den Saugern 20 den Sack 2 öffnet.At this projecting section of the bag 2, the transport device 17 engages with its suction devices 20, with which it grips the bag 2 and at the same time opens the bag 2 by increasing the distance between the suction devices 20.

Diese Sauger 20 sind in einem nicht weiter dargestellten Rahmen gehalten, der über ein Paar abgewinkelter Arme 21 um eine Achse 22 schwenkbar gehalten ist, wobei diese Achse parallel zur Ebene der Ablage 18 verläuft. Die Achse 22 ist in vertikaler Richtung tiefer als die Ablage 18 und in horizontaler Richtung näher der Aufzieheinrichtung 30 angeordnet, als die in Transportrichtung der Säcke 2 nachlaufende Kante 23 der Ablage 18 in deren dem Tisch 16 nächstgelegenen Endstellung. Gleichzeitig liegt die Achse 22 in horizontaler Richtung weiter von der Aufzieheinrichtung 30 entfernt, als die in Transportrichtung der Säcke 2 vorlaufende Kante 19 der Ablage 18 in deren der Aufzieheinrichtung 30 angenäherten Endlage.These suction cups 20 are held in a frame, not shown, which is held pivotably about an axis 22 via a pair of angled arms 21, this axis running parallel to the plane of the shelf 18. The axis 22 is arranged in the vertical direction lower than the tray 18 and in the horizontal direction closer to the mounting device 30 than the edge 23 of the tray 18 trailing in the transport direction of the bags 2 in its end position closest to the table 16. At the same time, the axis 22 lies further away from the pull-up device 30 in the horizontal direction than the edge 19 of the tray 18 leading in the transport direction of the bags 2 in its end position approximated to the pull-up device 30.

Für den Schwenkantrieb der Transporteinrichtung 17 ist eine Zylinder-Kolbenanordnung 24 vorgesehen, mit der die Transporteinrichtung zwischen dem Tisch 16 und der Aufzieheinrichtung 30 verschwenkt werden kann, wobei während des Verschwenkens der Transporteinrichtung in Richtung zur Aufzieheinrichtung 30 der Sack 2 geöffnet bleibt.For the pivoting drive of the transport device 17, a cylinder-piston arrangement 24 is provided, with which the transport device can be pivoted between the table 16 and the pull-up device 30, the bag 2 remaining open during the pivoting of the transport device in the direction of the pull-up device 30.

Die Aufzieheinrichtung 30 besteht im wesentlichen aus zwei um eine parallel zur Öffnungsebene des verschließbaren Fülltrichters 31 und parallel zur Schwenkachse 22 verlaufende Achse 32 schwenkbare Spreizarme 33, die im wesentlichen parallel zur Achse 32 gegeneinander bewegbar sind und an deren freien Enden Löffel 34 tragen, mit denen die Seitenfalten der Säcke 2 nach außen gedrückt werden.The mounting device 30 essentially consists of two spreading arms 33 which can be pivoted about an axis 32 which runs parallel to the opening plane of the closable hopper 31 and parallel to the pivot axis 22, which are essentially mutually movable parallel to the axis 32 and carry spoons 34 at their free ends, with which the gussets of the bags 2 are pressed outwards.

Sobald die Löffel 34 der Aufzieheinrichtung 30 in die Öffnung eines Sackes 2 eingreifen, bzw. der Sack 2 über diese mittels der Transporteinrichtung 17 gezogen ist, werden diese auseinander gespreizt, sodaß der Sack von den Löffeln 34 gehalten wird. Danach können die Saugköpfe 20 der Transporteinrichtung 17 entspannt werden, sodaß diese den Sack 2 freigeben, wonach die Transporteinrichtung 17 wieder zurück in deren Ausgangsstellung, in der sie dem Tisch 16 angenähert ist, zurückgeschwenkt werden kann.As soon as the spoons 34 of the pulling device 30 engage in the opening of a sack 2 or the sack 2 is pulled over them by means of the transport device 17, these are spread apart, so that the sack is held by the spoons 34. Thereafter, the suction heads 20 of the transport device 17 can be relaxed so that they release the sack 2, after which the transport device 17 can be pivoted back into its starting position, in which it is approximated to the table 16.

Die Aufzieheinrichtung 30 schwenkt nun in Richtung zum verschließbaren Fülltrichter 31 und schiebt dabei den Sack 2 über den verschließbaren Fülltrichter 31, wonach an diese die Klemmeinrichtungen 35 angepreßt werden können, mit denen die Wände des Sackes 2 an die Außenseiten des verschließbaren Fülltrichters 31 angepreßt werden. Danach schwenkt die Aufzieheinrichtung 30 weiter hoch, wodurch die Löffel 34 aus den Sack 2 herausgezogen werden.The puller 30 now pivots towards the closable hopper 31 and thereby pushes the bag 2 over the closable hopper 31, after which the clamping devices 35 can be pressed against it, with which the walls of the bag 2 are pressed against the outer sides of the closable hopper 31. Thereafter, the pulling device 30 pivots further upward, whereby the spoons 34 are pulled out of the bag 2.

Nach dem Füllen und Abstellen des gefüllten Sackes 2 schwenkt die Aufzieheinrichtung 30 wieder in deren mit vollen Linien dargestellte Übernahmeposition, in der die Löffel 34 in den nächsten Sack eingeschoben werden, wobei die Löffel 34 während des Rückschwenkens ihren gegenseitigen Abstand vermindern.After filling and placing the filled sack 2, the puller 30 pivots again into its takeover position shown in full lines, in which the spoons 34 are inserted into the next sack, the spoons 34 reducing their mutual distance during the swinging back.

Die Lage der Schwenkachsen 22 und 32, sowie die Länge der jeweiligen Arme 21 und 33 sind dabei so gewählt, daß die Ablage 18, die Teil der Transporteinrichtung 17 ist, im wesentlichen tangential zum von den Löffeln 34 beschriebenen Kreisbogen in der Übergabestellung der Transporteinrichtung 17 und der Aufzieheinrichtung 30 verläuft.The position of the pivot axes 22 and 32, and the length of the respective arms 21 and 33 are chosen so that the tray 18, which is part of the transport device 17, is substantially tangent to the circular arc described by the spoons 34 in the transfer position of the transport device 17th and the winding device 30 extends.

Die Ablage 18 selbst braucht den Sack 2 keinesfalls über dessen gesamte Länge bzw. Höhe abzustützen, sondern es genügt, wie in der Fig. 1 dargestellt, wenn diese etwa halb so lang wie der Sack 2 ist. Ein allfälliges Abknicken des Sackes über die nachlaufende Kante 23 der Ablage 18 ist nicht störend, da der Sack 2 im Bereich der Sacköffnung unterstützt ist und es daher zu einem symmetrischen Öffnen der Seitenfalten des Sackes kommt. Dies ermöglicht eine einwandfreie Übernahme des Sackes 2 durch die Aufzieheinrichtung 30, was ein einwandfreies Aufziehen des Sackes 2 auf den verschließbaren Fülltrichter 31 ermöglicht. Letzteres ist wieder für eine ordnungsgemäße Befüllung des Sackes erforderlich, um diesen faltenfrei verschließen zu können.The tray 18 itself does not need to support the sack 2 over its entire length or height, it is sufficient to as shown in Fig. 1, if this is about half as long as the sack 2. Any kinking of the sack over the trailing edge 23 of the tray 18 is not disturbing, since the sack 2 is supported in the area of the sack opening and the side gussets of the sack are therefore opened symmetrically. This enables the bag 2 to be taken over smoothly by the pulling device 30, which enables the bag 2 to be pulled onto the closable filling funnel 31 properly. The latter is again required for proper filling of the sack so that it can be closed without wrinkles.

Claims (5)

1. Apparatus for advancing a single sack from a place of deposit to a filling station with a closable loading funnel (chute), said apparatus comprising a conveying means having suction devices for opening and taking hold of the sacks, whereby a hoisting device for pulling up the sack onto a chute is subsequently arranged, characterized in that the conveying means (17) comprising siphons (20) and the place of deposit (18) are both coupled to each other with coordinated movements, so that every sack is supported at least partially during transport to the hoisting device (30).
2. Apparatus in accordance with claim 1, said hoisting device being arranged swivellable about a horizontal axis and optionally having straddling holding devices for taking up said sacks, characterized in that the conveying means (17) provided with siphons (20) and the place of deposit (18) are arranged swivellable about a preferably joint axle (22).
3. Apparatus in accordance with claims 1 or 2, characterized in that the place of deposit in the final position closest to the hoisting device (30) is positioned obliquely in a downward direction with regard to the conveying direction of the sacks, said downward position being formed by the trailing edge (23) towards the leading edge (19) and extending essentially tangential to the position of the hoisting device (30) or its holding bodies (34), respectively, in their handing over position.
4. Apparatus in accordance with one of claims 2 or 3, characterized in that the optionally imaginary swivelling axis or axes (22) of the conveying means (17) and the place of deposit (18) is/are located lower from a vertical point of view than the essentially horizontal place of deposit (18) at its the final position farthest from the hoisting device (30), and with regard to its horizontal direction said axis/axes is/are located farther away from the hoisting device (30) than the leading edge (19) of place of deposit (18), said leading edge being seen in the conveying direction of the sack, in its final position closest to the hoisting device (30).
5. Apparatus in accordance with one of claims 1 to 4, characterized in that the place of deposit (18) comprises in the conveying direction of the sack (2) an extension having half the length or height of the sack (2).
EP89890298A 1988-12-02 1989-11-16 Single bag feeding device Expired - Lifetime EP0380905B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2963/88 1988-12-02
AT0296388A AT404117B (en) 1988-12-02 1988-12-02 DEVICE FOR FEEDING A SINGLE BAG

Publications (2)

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EP0380905A1 EP0380905A1 (en) 1990-08-08
EP0380905B1 true EP0380905B1 (en) 1992-01-22

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EP89890298A Expired - Lifetime EP0380905B1 (en) 1988-12-02 1989-11-16 Single bag feeding device

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US (1) US4970847A (en)
EP (1) EP0380905B1 (en)
JP (1) JPH02180121A (en)
AT (1) AT404117B (en)
DE (1) DE58900773D1 (en)

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Also Published As

Publication number Publication date
DE58900773D1 (en) 1992-03-05
ATA296388A (en) 1998-01-15
EP0380905A1 (en) 1990-08-08
AT404117B (en) 1998-08-25
US4970847A (en) 1990-11-20
JPH02180121A (en) 1990-07-13

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