EP0108901B1 - Method and device for closing bags - Google Patents

Method and device for closing bags Download PDF

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Publication number
EP0108901B1
EP0108901B1 EP83109695A EP83109695A EP0108901B1 EP 0108901 B1 EP0108901 B1 EP 0108901B1 EP 83109695 A EP83109695 A EP 83109695A EP 83109695 A EP83109695 A EP 83109695A EP 0108901 B1 EP0108901 B1 EP 0108901B1
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EP
European Patent Office
Prior art keywords
extension
conveyor track
fingers
movement
bags
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
Application number
EP83109695A
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German (de)
French (fr)
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EP0108901A2 (en
EP0108901A3 (en
Inventor
Bruno Gmür
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Buehler AG
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Buehler AG
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Publication date
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Publication of EP0108901A2 publication Critical patent/EP0108901A2/en
Publication of EP0108901A3 publication Critical patent/EP0108901A3/en
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Publication of EP0108901B1 publication Critical patent/EP0108901B1/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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/02—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks
    • B65B7/06—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks by collapsing mouth portion, e.g. to form a single flap

Definitions

  • DE-B 25 03 403 describes a spreading mechanism whose spreading fingers can only be moved via linearly active elements. This requires a heavy-weight construction, which reduces the working speed.
  • the spreading fingers are pivoted throughout the spreading process as well as during lifting and lowering about axes which are oriented transversely to the conveying direction.
  • a precise, that is to say as free of play as possible, guidance of the spreading fingers is only possible with this device because of the numerous pivot bearings with a sufficiently heavy construction, which prevents a high working speed.
  • the invention also facilitates the particularly advantageous embodiment according to claim 3, which supports the closing of the bags by evacuating the upper end of the bag. At the same time, dust emissions are suppressed.
  • a commercially available sewing device 12 is attached to the jacket 10 and sews the passing bags at the upper end. Since the special design of such a sewing device has no influence on the present invention, its description is omitted.
  • a folding device 13 is fastened to the jacket 10 with the folding strips 14 and 15, the upper folding edge of the folding strip 14 determining the effective direction of the folding device 13, i.e. the folding line.
  • the folding device 13 is, seen in the conveying direction 4 of the conveyor section 3, in front of the sewing device 12. Like the sewing device 12, it is a known unit and has no influence on the present invention with regard to its design.
  • a carrier 19 and a frame 16 are further attached, which consists of two longitudinal guides 17 and 18 and two vertical struts 19th and 20 exists.
  • a support element in the form of a slide 30 for the spreading fingers 21 in the conveying direction (arrow 4) of the conveying path 3 is displaceably mounted to and fro.
  • Two swivel axes 36 and 37 are fixedly arranged in the slide 30, about which angle levers 38 and 39 are pivotably mounted.
  • the mutually facing legs of the angle levers 38 and 39 are connected to one another by a joint member 40, whereas the ends of a pneumatic cylinder-piston unit are articulated on the other legs at 41 and 42, respectively.
  • a suction pipe 45 is fastened to the bearing housing 32 by means of a pipe clamp 44, which ends over the downward ends of the spreading fingers 21 and widens in a funnel shape against them.
  • An armored corrugated hose 45 is connected to the suction pipe 45 and leads to a suction air source, not shown. Because the suction pipe 45 is firmly connected to the bearing housing 32, the dust extraction is always in the immediate vicinity of the spreading fingers 21 and thus, during a spreading process, directly above the upper end of the bag, i.e. at the location where the dust develops.
  • FIGS. 7 to 14 FIGS. 7, 9, 11 and 13 showing views of the spreading device shown in simplified form and FIGS. 8, 10, 12 and 14 are plan views of the preceding figure.
  • the cylinder-piston units 23 Hold the closing strips 23 in their spread position so that the bag 52 can move between them without interference.
  • the carriage 30 assumes its end position remote from the column 9, in which the piston rod of the cylinder-piston unit 34 extends and the bearing housing 32 is pivoted upwards with the spreading fingers 21.
  • the piston rod of the cylinder-piston unit 43 is retracted so that the spreading fingers 21 assume the adjacent position.
  • the sack 52 actuates the sensor of a switch E 1, as a result of which the motor 37 and the cylinder piston units 34 and 43 are actuated, so that the carriage 30 moves at the same speed with the conveyor path 3 and the bearing housing 32 with the spreading fingers 21 is lowered and the spreading fingers 21 are moved apart to carry out the spreading movement.
  • the ends of the spreading fingers 21 dip into the open end of the bag.
  • the carriage 30 actuates a switch E 2, which activates the cylinder piston units 23 'for a closing movement.
  • the closing strips 23 lie at the upper end of the sack against the sack walls held in parallel alignment by the spreading fingers 21 and form a narrow guide slot in which the upper end of the sack can slide with the sack walls lying against one another.
  • the switch E 3 which actuates the cylinder piston unit 43 and moves the spreading fingers 21 against each other. He also activates the cylinder piston units 23 'and 34 in such a way that the closing strips 23 are spread and the spreading fingers with the bearing housing 32 are pivoted upward out of the bag 52.
  • switch E 4 switches motor 47, which moves carriage 30 back against vertical strut 20, where it actuates switch E 4, which switches motor 47 off (FIGS. 7 and 8).
  • the column 9 can be pivoted by actuating the motor 28 until the fold edge of the lower fold bar 14 or the longitudinal guides 17 and 18 are aligned parallel to the conveyor line 3 are, which ensures a straight folding and sewing of the bag end.

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

Description

Die vorliegende Erfindung bezieht sich auf eine Vorrichtung gemäss dem Oberbegriff des Anspruchs 1 und ein Verfahren zu deren Betrieb.The present invention relates to a device according to the preamble of claim 1 and a method for its operation.

Eine derartige Vorrichtung ist aus der GB-A 1 275 930 bekannt. Diese bekannte Vorrichtung hat den Nachteil, dass die Geschwindigkeit, mit denen die Spreizfinger frei gegeben, in Förderrichtung bewegt, angehoben, gespannt und zurück in die Ausgangslage bewegt werden zwangsweise miteinander verknüpft sind. Keine der vorgenannten Bewegungen kann für sich schneller oder langsamer ausgeführt werden ohne dass dabei nicht auch die anderen Bewegungen entsprechend beschleunigt oder verzögert werden. Zudem erfordern die Freigabe für das Senken und das Heben der Spreizfinger eine volle Umdrehung von zwei Kettenrädern, deren Durchmesser durch den Hubweg der Spreizfinger vorgegeben ist und daher nicht beliebig verkleinert oder vergrössert werden kann. Die Drehzahl dieser Kettenräder bestimmt die Arbeitsgeschwindigkeit. Soll nun für die Spreizbewegung noch zureichend Zeit verfügbar sein, so muss entweder die Vorrichtung mit geringerer Geschwindigkeit betrieben oder der Abstand der Drehachsen zwischen den Kettenrädern, und damit die Maschine insgesamt, vergrössert werden.Such a device is known from GB-A 1 275 930. This known device has the disadvantage that the speed at which the spreading fingers are released, moved in the conveying direction, raised, tensioned and moved back to the starting position are forcibly linked to one another. None of the aforementioned movements can be carried out faster or slower without the other movements not being accelerated or decelerated accordingly. In addition, the release for lowering and lifting the spreading fingers requires a full rotation of two sprockets, the diameter of which is determined by the stroke of the spreading fingers and therefore cannot be reduced or enlarged as desired. The speed of these sprockets determines the working speed. If sufficient time is now to be available for the spreading movement, either the device must be operated at a lower speed or the distance between the axes of rotation between the chain wheels, and thus the machine as a whole, must be increased.

Aus der DE-A 28 43 958 ist weiter bekannt, die Spreizfinger längs einer geradlinigen geneigten Bahn in das obere Sackende eintauchen zu lassen. Nebst einer aufwendigen Konstruktion ist hier die Abstimmung der Mitlaufgeschwindigkeit der Spreizfinger auf die Geschwindigkeit des Förderbandes, da die Neigung der Führungsbahn die Eintauchgeschwindigkeit und den Mitlaufweg beeinflusst und daher zu berücksichtigen ist.From DE-A 28 43 958 it is also known to allow the spreading fingers to dip into the upper end of the bag along a straight, inclined path. In addition to a complex construction, the matching of the idle speed of the spreading fingers to the speed of the conveyor belt is necessary because the inclination of the guideway influences the dipping speed and the idle path and must therefore be taken into account.

Die DE-B 25 03 403 beschreibt einen Spreizmechanismus, dessen Spreizfinger ausschliesslich über linear wirksame Elemente bewegbar sind. Dies erfordert eine schwergewichtige Konstruktion, was die Arbeitsgeschwindigkeit reduziert.DE-B 25 03 403 describes a spreading mechanism whose spreading fingers can only be moved via linearly active elements. This requires a heavy-weight construction, which reduces the working speed.

Bei der in der DE-B 20 03 200 gezeigten Vorrichtung werden die Spreizfinger während des Spreizvorganges sowie während des Hebens und Senkens durchwegs um Achsen verschwenkt, die zur Förderrichtung quer orientiert sind. Eine präzise, das heisst möglichst spielfreie Führung der Spreizfinger ist bei dieser Vorrichtung wegen der zahlreichen Schwenklager nur bei hinreichend schwerer Konstruktion möglich, was einer hohen Arbeitsgeschwindigkeit entgegensteht.In the device shown in DE-B 20 03 200, the spreading fingers are pivoted throughout the spreading process as well as during lifting and lowering about axes which are oriented transversely to the conveying direction. A precise, that is to say as free of play as possible, guidance of the spreading fingers is only possible with this device because of the numerous pivot bearings with a sufficiently heavy construction, which prevents a high working speed.

Die vorliegende Erfindung stellt sich nun die Aufgabe, eine Vorrichtung der eingangs genannten Art derart zu verbessern, dass bei hinreichend grossem Hub der Spreizfinger deren Absenken und Anheben praktisch momentan erfolgen kann, ohne dass sich dadurch deren räumliche Abmessungen vergrössern.The object of the present invention is to improve a device of the type mentioned in the introduction in such a way that, with a sufficiently large stroke, the spreading fingers can be lowered and raised practically instantaneously without the spatial dimensions thereby increasing.

Erfindungsgemäss wird diese Aufgabe gelöst durch die kennzeichnenden Merkmale des Anspruchs 1.According to the invention, this object is achieved by the characterizing features of claim 1.

Die Erfindung erleichtert auch die besonders vorteilhafte Ausführung gemäss dem Anspruch 3, welche das Schliessen der Säcke durch ein Evakuieren des oberen Sackendes unterstützt. Gleichzeitig werden dadurch Staubimmissionen unterdrückt.The invention also facilitates the particularly advantageous embodiment according to claim 3, which supports the closing of the bags by evacuating the upper end of the bag. At the same time, dust emissions are suppressed.

Anhand der beiliegenden schematischen Zeichnung wird die Erfindung besipielsweise erläutert. Es zeigen:

  • Fig. 1 eine Ansicht einer Anlage zum Absacken von schüttfähigen Produkten,
  • Fig. 2 eine Draufsicht auf Fig. 1,
  • Fig. 3 eine gleiche Darstellung wie Fig. 1, ausschnittweise mit einer Variante,
  • Fig. 4 eine Draufsicht auf Fig. 3,
  • Fig. 5 einen Schnitt längs der Linie V-V in Fig. 2 und 6,
  • Fig. 6 einen Schnitt längs der Linie VI-VI in Fig. 5,
  • Fig. 7, 9, 11 und 13 einen Ausschnitt aus Fig. 1 in vereinfachter Darstellung in verschiedenen Betriebsphasen und
  • Fig. 8, 10, 12 und 14 je eine Draufsicht auf die ihnen jeweils vorangehende Fig.
The invention is explained, for example, with the aid of the attached schematic drawing. Show it:
  • 1 is a view of a plant for bagging pourable products,
  • 2 is a plan view of FIG. 1,
  • 3 shows the same representation as FIG. 1, in sections with a variant,
  • 4 is a plan view of FIG. 3,
  • 5 shows a section along the line VV in FIGS. 2 and 6,
  • 6 shows a section along the line VI-VI in FIG. 5,
  • 7, 9, 11 and 13 a section of FIG. 1 in a simplified representation in different operating phases and
  • 8, 10, 12 and 14 are each a top view of the preceding figure.

Die Fig. 1 und 2 zeigen eine Anlage zum Absakken von schüttfähigen Produkten. Sie weisen ein Absackkarussell 1 auf, von dem die gefüllten Säkke 2 auf eine Förderstrecke 3 abgestellt und von dieser in Förderrichtung (Pfeil 4) wegtransportiert werden. Die Förderstrecke 3 ist als endloses Förderband ausgebildet, dass um die Drehachse 5 seiner Umlenkrolle des Ablaufendes verschwenkbar ist. Die Umlenkrolle bei der Annahmestelle ist mit ihrer Drehachse 6 vertikal verstellbar in einem Lager 7 gelagert, welches wagenheberartig gestaltet sein kann. Durch die Höhenverstellbarkeit ist der Abstand H der Förderstrecke 3 zum Absackkarussell 1 der Höhe der abzufüllenden Säkke anpassbar derart, dass die Fallhöhe der Säcke konstant und möglichst klein gehalten werden kann.1 and 2 show a system for bagging pourable products. They have a bagging carousel 1, from which the filled bags 2 are placed on a conveyor section 3 and transported away from the latter in the conveying direction (arrow 4). The conveyor section 3 is designed as an endless conveyor belt that can be pivoted about the axis of rotation 5 of its deflecting roller of the outflow end. The deflection roller at the receiving point is mounted with its axis of rotation 6 vertically adjustable in a bearing 7, which can be designed like a jack. Due to the height adjustability, the distance H of the conveyor section 3 to the bagging carousel 1 can be adapted to the height of the bags to be filled in such a way that the drop height of the bags can be kept constant and as small as possible.

An der Förderstrecke ist mittels eines Dreifusses 8 eine Säule 9 angeordnet, an der ein Mantel 10 vertikal verschiebbar gelagert und mittels eines Motors 11 und einem nicht sichtbaren Trapezgewinde antreibbar ist. Durch den Motor 11 kann der Mantel 10 in seiner Höhenlage längs der Säule 9 verstellt werden.A column 9 is arranged on the conveyor section by means of a tripod 8, on which a casing 10 is mounted so as to be vertically displaceable and can be driven by means of a motor 11 and a trapezoidal thread which is not visible. The height of the jacket 10 can be adjusted along the column 9 by the motor 11.

Am Mantel 10 ist eine handelsübliche Näheinrichtung 12 befestigt, welche die vorbeilaufenden Säcke am oberen Ende zunäht. Da die besondere Ausgestaltung einer solchen Näheinrichtung auf die vorliegende Erfindung ohne Einfluss ist, wird auf deren Beschreibung verzichtet.A commercially available sewing device 12 is attached to the jacket 10 and sews the passing bags at the upper end. Since the special design of such a sewing device has no influence on the present invention, its description is omitted.

Weiter ist am Mantel 10 eine Falzeinrichtung 13 mit den Falzleisten 14 und 15 befestigt, wobei die obere Falzkante der Falzleiste 14 die Wirkrichtung der Falzeinrichtung 13, d.h., die Falzlinie bestimmt. Die Falzeinrichtung 13 liegt, in Förderrichtung 4 der Förderstrecke 3 gesehen vor der Näheinrichtung 12. Sie ist ebenfalls wie die Näheinrichtung 12 ein bekanntes Aggregat und hinsichtlich ihrer Ausbildung ohne Einfluss auf die vorliegende Erfindung.Furthermore, a folding device 13 is fastened to the jacket 10 with the folding strips 14 and 15, the upper folding edge of the folding strip 14 determining the effective direction of the folding device 13, i.e. the folding line. The folding device 13 is, seen in the conveying direction 4 of the conveyor section 3, in front of the sewing device 12. Like the sewing device 12, it is a known unit and has no influence on the present invention with regard to its design.

Am Mantel 10 ist weiter ein Träger 19 und darauf ein Rahmen 16 befestigt, der aus zwei Längsführungen 17 und 18 und zwei Vertikalstreben 19 und 20 besteht. An den Längsführungen 17 und 18 ist ein Tragelement in Form eines Schlittens 30 für die Spreizfinger 21 in Förderrichtung (Pfeil 4) der Förderstrecke 3 hin und her verschiebbar gelagert.On the jacket 10, a carrier 19 and a frame 16 are further attached, which consists of two longitudinal guides 17 and 18 and two vertical struts 19th and 20 exists. On the longitudinal guides 17 and 18, a support element in the form of a slide 30 for the spreading fingers 21 in the conveying direction (arrow 4) of the conveying path 3 is displaceably mounted to and fro.

Weiter ist an der Vertikalstrebe 19 des Rahmens 16 ein Trägerarm 22 befestigt, an dem zwei Schliessleisten 23 angelenkt sind. Die Schliessleisten 23 werden durch pneumatische Zylinder 23' betätigt und sind zwischen der mit ausgezogenen Strichen gezeichneten Lage einerseits und der strichpunktiert gezeichneten Lage anderseits verschwenkbar.Furthermore, a support arm 22 is fastened to the vertical strut 19 of the frame 16, to which two locking strips 23 are articulated. The closing strips 23 are actuated by pneumatic cylinders 23 'and can be pivoted between the position drawn with solid lines on the one hand and the position shown in dash-dot lines on the other hand.

Wie die Fig. 3 und 4 zeigen kann der Dreifuss 8 der Säule 9 um eine horizontale, zur Förderrichtung (Pfeil 4) der Förderstrecke 3 quer orientierte Achse 24 schwenkbar gelagert und bei 25 höhenverstellbar an den Mutterkörper 26 auf einer motorisch antreibbaren Spindel 27 angelenkt sein. Durch ein Einschalten eines Motors 28 kann die Spindel 27 gedreht und die Neigung der Säule 9 verändert werden, derart, dass sich die Wirkrichtung der Falzeinrichtung (Neigungswinkel der Falzkante der Falzleiste 17 mit Bezug auf eine horizontale Ebene) verändert. Durch ein Drehen an der Spindel 27 kann somit die Falzeinrichtung 13 stets auf eine zur Förderstrecke 3 parallele Falzlinie eingestellt werden, wenn der Neigungswinkel der Förderstrecke geändert wird.As shown in FIGS. 3 and 4, the tripod 8 of the column 9 can be pivoted about a horizontal axis 24 oriented transversely to the conveying direction (arrow 4) of the conveying path 3 and at 25 height-adjustable to the nut body 26 on a motor-driven spindle 27 . By turning on a motor 28, the spindle 27 can be rotated and the inclination of the column 9 can be changed such that the direction of action of the folding device (angle of inclination of the folding edge of the folding strip 17 with respect to a horizontal plane) changes. By turning the spindle 27, the folding device 13 can thus always be set to a folding line parallel to the conveying path 3 if the angle of inclination of the conveying path is changed.

Gemäss Fig. 5 und 6 ist im Schlitten 30 parallel zu den Längsführungen 17 und 18 eine Schwenkachse 31 angeordnet, an der ein Lagergehäuse 32 angelenkt ist. Weiter ist bei 33 eine pneumatische Zylinderkolbeneinheit 34 am Schlitten 30 angelenkt, deren Kolbenstange bei 35 gelenkig mit dem Lagergehäuse 32 verbunden ist. Wird die Kolbenstange der Zylinderkolbeneinheit 34 ausgefahren, wird das Lagergehäuse 32 aus der mit ausgezogenen Strichen gezeigten Lage in der die nach unten gebogenen Enden der Spreizfinger 21 in einer senkrechten Ebene in die mit strichpunktierten Linien angedeutete Lage nach oben verschwenkt. Beim Einfahren der Kolbenstange erfolgt eine umgekehrte Schwenkbewegung nach unten.5 and 6, a pivot axis 31 is arranged in the slide 30 parallel to the longitudinal guides 17 and 18, to which a bearing housing 32 is articulated. At 33, a pneumatic cylinder-piston unit 34 is articulated on the slide 30, the piston rod of which is articulated at 35 to the bearing housing 32. If the piston rod of the cylinder-piston unit 34 is extended, the bearing housing 32 is pivoted upward from the position shown with solid lines in which the downwardly bent ends of the spreading fingers 21 are pivoted in a vertical plane into the position indicated by dash-dotted lines. When the piston rod is retracted, the swivel movement is reversed downwards.

Im Schlitten 30 sind zwei Schwenkachsen 36 und 37 fest angeordnet, um welche Winkelhebel 38 und 39 schwenkbar gelagert sind. Die einander zugewandten Schenkel der Winkelhebel 38 und 39 sind durch ein Gelenkglied 40 miteinander verbunden, wogegen an den anderen Schenkeln bei 41 bzw. 42 die Enden einer pneumatischen Zylinderkolbeneinheit angelenkt sind. An den durch die Zylinderkolbeneinheit 43 miteinander verbundenen Schenkeln der Winkelhebel 38 und 39 ist ferner je ein Spreizfinger 21 befestigt. Wird die Kolbenstange der Zylinderkolbeneinheit43 ausgefahren, verschwenken sich die Winkelhebel 38, 39, bedingt durch das Gelenkglied 40, symmetrisch nach aussen in die strichpunktiert gezeigte Stellung und vollziehen eine Spreizbewegung. Beim Einfahren der Kolbenstange der Zylinderkolbeneinheit 43 werden die Spreizfinger 21 gegen einander bewegt.Two swivel axes 36 and 37 are fixedly arranged in the slide 30, about which angle levers 38 and 39 are pivotably mounted. The mutually facing legs of the angle levers 38 and 39 are connected to one another by a joint member 40, whereas the ends of a pneumatic cylinder-piston unit are articulated on the other legs at 41 and 42, respectively. On the legs of the angle levers 38 and 39 which are connected to one another by the cylinder-piston unit 43, an expansion finger 21 is also each attached. If the piston rod of the cylinder-piston unit 43 is extended, the angle levers 38, 39 pivot, due to the articulated member 40, symmetrically outwards into the position shown in broken lines and perform a spreading movement. When the piston rod of the cylinder-piston unit 43 is retracted, the spreading fingers 21 are moved against one another.

Wie die Fig. 5 zeigt ist mittels einer Rohrschelle 44 ein Saugrohr 45 am Lagergehäuse 32 befestigt, das über den nach unten gerichteten Enden der Spreizfinger 21 endet und sich gegen diese trichterförmig ausweitet. An das Saugrohr 45 ist ein armierter Faltenschlauch 45 angeschlossen, der zu einer nicht dargestellten Saugluftquelle führt. Dadurch dass das Saugrohr 45 fest mit dem lagergehäuse 32 verbunden ist, befindet sich die Staubabsaugung immer in unmittelbarer Nähe der Spreizfinger 21 und damit, während eines Spreizvorganges, unmittelbar über dem oberen Sackende, d.h., beim Ort der Staubentwicklung.As shown in FIG. 5, a suction pipe 45 is fastened to the bearing housing 32 by means of a pipe clamp 44, which ends over the downward ends of the spreading fingers 21 and widens in a funnel shape against them. An armored corrugated hose 45 is connected to the suction pipe 45 and leads to a suction air source, not shown. Because the suction pipe 45 is firmly connected to the bearing housing 32, the dust extraction is always in the immediate vicinity of the spreading fingers 21 and thus, during a spreading process, directly above the upper end of the bag, i.e. at the location where the dust develops.

Für die Hin- und Herbewegung des Schlittens 30 ist ein Motor 47 (Fig. 2) vorgesehen, der über ein Getriebe 48 eine Spindel 49 (Fig. 5) antreibt, die parallel zu den Längsführungen 17 und 18 verläuft und in einer Gewindebohrung am Schlitten 30 gelagert ist. Anstelle der Spindel 49 kann auch eine endlose Kette als Antriebselement vorgesehen sein. Je nach der Drehrichtung des Motors 47 wird der Schlitten 30 in Förderrichtung der Förderstrekke (Pfeil 4, Fig. 1) oder dieser entgegengesetzt bewegt.For the back and forth movement of the carriage 30, a motor 47 (FIG. 2) is provided, which drives a spindle 49 (FIG. 5) via a gear 48, which runs parallel to the longitudinal guides 17 and 18 and in a threaded bore on the carriage 30 is stored. Instead of the spindle 49, an endless chain can also be provided as the drive element. Depending on the direction of rotation of the motor 47, the carriage 30 is moved in the conveying direction of the conveying path (arrow 4, FIG. 1) or in the opposite direction.

Nachfolgend wird anhand der Fig. 7 bis 14 die Funktion der beschriebenen Anlage zum Absakken von schüttfähigen Produkten wie Mehl und dgl. erläutert, wobei die Fig. 7, 9, 11 und 13 Ansichten der vereinfacht dargestellten Spreizvorrichtung und die Fig. 8, 10, 12 und 14 Draufsichten auf die ihnen vorgehende Fig. sind. Ein von der Förderstrecke 3 mit konstanter Geschwindigkeit in Förderrichtung (Pfeil 4) gefüllter und oben offener Sack 52 erreicht in Fig. 7 und 8 die Spreizvorrichtung. Zu diesem Zeitpunkt halten die Zylinderkolbeneinheiten 23' die Schliessleisten 23 in ihrer Spreizstellung damit der Sack 52 störungsfrei dazwischen fahren kann. Der Schlitten 30 nimmt dabei seine von der Säule 9 entfernte Endlage ein, in der die Kolbenstange der Zylinderkolbeneinheit 34 ausgefahren und das Lagergehäuse 32 mit den Spreizfinger 21 nach oben geschwenkt ist. Die Kolbenstange der Zylinderkolbeneinheit 43 ist dabei eingefahren, so dass die Spreizfinger 21 die einander benachbarte Stellung einnehmen. Zu diesem Zeitpunkt betätigt der Sack 52 den Fühler eines Schalters E 1, wodurch der Motor 37 sowie die Zylinderkolbeneinheiten 34 und 43 betätigt werden, derart dass sich der Schlitten 30 mit gleicher Geschwindigkeit mit der Förderstrecke 3 mitbewegt und das Lagergehäuse 32 mit den Spreizfingern 21 gesenkt und die Spreizfinger 21 zur Ausübung der Spreizbewegung auseinander bewegt werden. Dabei tauchen die Enden der Spreizfinger 21 in das offene Sackende ein. Gegen das Ende der Spreizbewegung (Fig. 9 und 10) betätigt der Wagen 30 einen Schalter E 2, der die Zylinderkolbeneinheiten 23' zu einer Schliessbewegung aktiviert. Die Schliessleisten 23 legen sich am oberen Ende des Sackes gegen die durch die Spreizfinger 21 in paralleler Ausrichtung gehaltenen Sackwände und bilden einen schmalen Führungsschlitz, in dem das obere Sackende mit aneinander liegenden Sackwänden weitergleiten kann. Erreicht der Schlitten 30 seine der Säule 9 nächstliegende Endlage (Fig. 11 bis 14) betätigt er den Schalter E 3 der die Zylinderkolbeneinheit 43 betätigt und die Spreizfinger 21 gegeneinander bewegt. Weiter aktiviert er die Zylinderkolbeneinheiten 23' und 34 derart, dass die Schliessleisten 23 gespreizt und die Spreizfinger mit dem Lagergehäuse 32 nach oben aus dem Sack 52 herausgeschwenkt werden. Ebenso schaltet der Schalter E 4 den Motor 47 um, der den Schlitten 30 gegen die Vertikalstrebe 20 zurückbewegt, wo er den Schalter E 4 betätigt, der den Motor 47 abstellt (Fig. 7 und 8).The function of the described system for bagging pourable products such as flour and the like is explained below with reference to FIGS. 7 to 14, FIGS. 7, 9, 11 and 13 showing views of the spreading device shown in simplified form and FIGS. 8, 10, 12 and 14 are plan views of the preceding figure. A sack 52 filled by the conveyor section 3 at a constant speed in the conveying direction (arrow 4) and open at the top reaches the spreading device in FIGS. 7 and 8. At this time, the cylinder-piston units 23 'hold the closing strips 23 in their spread position so that the bag 52 can move between them without interference. The carriage 30 assumes its end position remote from the column 9, in which the piston rod of the cylinder-piston unit 34 extends and the bearing housing 32 is pivoted upwards with the spreading fingers 21. The piston rod of the cylinder-piston unit 43 is retracted so that the spreading fingers 21 assume the adjacent position. At this point in time, the sack 52 actuates the sensor of a switch E 1, as a result of which the motor 37 and the cylinder piston units 34 and 43 are actuated, so that the carriage 30 moves at the same speed with the conveyor path 3 and the bearing housing 32 with the spreading fingers 21 is lowered and the spreading fingers 21 are moved apart to carry out the spreading movement. The ends of the spreading fingers 21 dip into the open end of the bag. Towards the end of the spreading movement (FIGS. 9 and 10), the carriage 30 actuates a switch E 2, which activates the cylinder piston units 23 'for a closing movement. The closing strips 23 lie at the upper end of the sack against the sack walls held in parallel alignment by the spreading fingers 21 and form a narrow guide slot in which the upper end of the sack can slide with the sack walls lying against one another. When the carriage 30 reaches its column 9 nearest end position (Fig. 11 to 14), he actuates the switch E 3 which actuates the cylinder piston unit 43 and moves the spreading fingers 21 against each other. He also activates the cylinder piston units 23 'and 34 in such a way that the closing strips 23 are spread and the spreading fingers with the bearing housing 32 are pivoted upward out of the bag 52. Likewise, switch E 4 switches motor 47, which moves carriage 30 back against vertical strut 20, where it actuates switch E 4, which switches motor 47 off (FIGS. 7 and 8).

Die Spreizvorrichtung ist jetzt wieder bereit, das obere offene Ende des nächsten ankommenden Sackes zu spreizen.The spreader is now ready to spread the top open end of the next incoming bag.

Der die Schliessleisten 23 verlassende Sack 62 gelangt mit seinem oberen Ende zwischen die Falzleisten 14 und 15, so dass dieses nach unten umgelegt und gefalzt wird. Das derart umgefalzte obere Sackende durchläuft anschliessend die Näheinrichtung 12, wo parallel zum Falz vernäht wird. Anstelle der Näheinrichtung kann auch eine Beleimstation vorgesehen sein, wobei das obere Sackende durch Leimen verschlossen wird.The upper end of the bag 62 leaving the closing strips 23 reaches between the folding strips 14 and 15, so that it is folded down and folded. The upper end of the bag folded over in this way then passes through the sewing device 12, where sewing is carried out parallel to the fold. Instead of the sewing device, a gluing station can also be provided, the upper end of the bag being closed by gluing.

Wird bei einer Änderung der Sackhöhe die Förderstrecke 3 bei der Annahmestelle gehoben, so kann durch ein Betätigen des Motors 28 die Säule 9 so lange verschwenkt werden, bis sich die Falzkante der unteren Falzleiste 14 bzw. die Längsführungen 17 und 18 parallel zur Förderstrecke 3 ausgerichtet sind, wodurch ein gerades Falzen und Vernähen des Sackendes gewährleistet wird.If the conveyor line 3 is raised at the acceptance point when the bag height changes, the column 9 can be pivoted by actuating the motor 28 until the fold edge of the lower fold bar 14 or the longitudinal guides 17 and 18 are aligned parallel to the conveyor line 3 are, which ensures a straight folding and sewing of the bag end.

Claims (11)

1. Apparatus for the application of the sides of bags parallel to each other at the upper open end of filled bags (2), with a continuously driven conveyor track (3) forming a conveyor path and with two extension fingers (21), which are movable from the top into the open bag end and can be moved upwards out again after the extension has been effected, for which purpose, a carrier element (30), having the extension fingers (21) and the associated extension drive (38 to 43), is mounted parallel to the conveyor track (3) for sliding to and fro on a slideway (17, 18) in such a way that with a movement in the conveyance direction (4), an extension movement is effected and the carrier element (30) is driven at the end of the extension movement at approximately at least the same speed as the conveyor track (3), characterised in that a bearing casing (32) is articulated on the carrier element (30) on an axle (31) which is parallel to the slideway (17, 18), that the extension fingers (21) with the extension drive (38 to 43) are arranged on the bearing casing (32) and that the bearing casing (32) is capable of being tilted by means of a tilting drive (33 to 35) from a position of the extension fingers (21) which is essentially perpendicular to the conveyor track (3), into a raised position wherein the extension fingers lie outside the conveyor path of the bags (2).
2. Apparatus according to Claim 1, characterised in that sensors (E1 to E4) are arranged in the displacement path of the carrier element (30) and in the displacement path of the bags (2) for generating control pulses in order to switch the abovementioned drives, as well as a carrier element drive (47), on or off respectively.
3. Apparatus according to Claim 1, characterised in that on the bearing casing (32) there is fixed a vacuum line (46) which terminates in a suction funnel (45) directly above the extension fingers (21) and being directed towards them.
4. Apparatus according to Claim 1, characterised in that the inclination of the slideway (17, 18) is adjustable with reference to a horizontal plane for the purpose of making it possible, even when the conveyor track (3) is sloping, to align the slideway (17, 18) parallel to the latter.
5. Apparatus according to Claim 4, characterised in that after the extension movement of the extension fingers (21) has been effected, two lateral guides (23) are moved towards the extension fingers (21) in a scissor-like movement until they are aligned parallel with them, and that the free ends of the lateral guides (23) lie, viewed in the conveyance direction (4) of the conveyor track (3), ahead of their ends which are mounted for swivelling.
6. Apparatus according to Claim 1, characterised in that the extension apparatus or the extension fingers (21) is or are mounted on a column (9) which is orientated perpendicular to the conveyor track (3).
7. Apparatus or installation according to Claim 6, characterised in that the column (9) is fixedly connected to the conveyor track (3) whose height is adjustable.
8. Apparatus or installation according to Claim 7, characterised in that the length of the column (9) is telescopically adjustable.
9. Method for the operation of an apparatus according to Claim 7, characterised in that the inclination of the conveyor track (3) is adjusted in such a way that variations in the height of the bags are compensated by a corresponding unilateral adjustment of the height of the receiving side of the conveyor track (3), a slight rotational movement being effected therewith around an axis in the delivery zone of the conveyor track (3).
10. Method according to Claim 9, characterised in that the inclination of the slideway (17, 18) is adjusted simultaneously with the inclination of the conveyor track (3).
11. Method according to Claims 9 and 10, characterised in that a folding device with a sewing or glueing station is mounted on the column (9) in such a way that its working plane is operating parallel to the plane of movement of the bag opening zone.
EP83109695A 1982-10-16 1983-09-28 Method and device for closing bags Expired EP0108901B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH6013/82A CH659042A5 (en) 1982-10-16 1982-10-16 PLANT FOR SACKING POSSIBLE PRODUCTS AND METHOD FOR THEIR OPERATION.
CH6013/82 1982-10-16

Publications (3)

Publication Number Publication Date
EP0108901A2 EP0108901A2 (en) 1984-05-23
EP0108901A3 EP0108901A3 (en) 1986-08-27
EP0108901B1 true EP0108901B1 (en) 1988-06-01

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ID=4302847

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EP83109695A Expired EP0108901B1 (en) 1982-10-16 1983-09-28 Method and device for closing bags

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US (1) US4704845A (en)
EP (1) EP0108901B1 (en)
JP (1) JPS5993621A (en)
CH (1) CH659042A5 (en)
DE (1) DE3376823D1 (en)
SU (1) SU1281167A3 (en)

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Also Published As

Publication number Publication date
EP0108901A2 (en) 1984-05-23
SU1281167A3 (en) 1986-12-30
DE3376823D1 (en) 1988-07-07
EP0108901A3 (en) 1986-08-27
CH659042A5 (en) 1986-12-31
US4704845A (en) 1987-11-10
JPS5993621A (en) 1984-05-30

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