EP0340315B1 - Method and apparatus for introducing bags to a filling station - Google Patents

Method and apparatus for introducing bags to a filling station Download PDF

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Publication number
EP0340315B1
EP0340315B1 EP19880106967 EP88106967A EP0340315B1 EP 0340315 B1 EP0340315 B1 EP 0340315B1 EP 19880106967 EP19880106967 EP 19880106967 EP 88106967 A EP88106967 A EP 88106967A EP 0340315 B1 EP0340315 B1 EP 0340315B1
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EP
European Patent Office
Prior art keywords
bag
conveying
jaws
filling station
station
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
EP19880106967
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German (de)
French (fr)
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EP0340315A1 (en
Inventor
Werner Döring
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"fix" Peter Steimel & Cokg GmbH
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"fix" Peter Steimel & Cokg GmbH
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Filing date
Publication date
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Priority to DE8888106967T priority Critical patent/DE3882697D1/en
Priority to EP19880106967 priority patent/EP0340315B1/en
Publication of EP0340315A1 publication Critical patent/EP0340315A1/en
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Publication of EP0340315B1 publication Critical patent/EP0340315B1/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
    • B65B43/12—Feeding flexible bags or carton blanks in flat or collapsed state; Feeding flat bags connected to form a series or chain
    • 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
    • B65B43/46—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 using grippers
    • B65B43/465—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 using grippers for bags

Definitions

  • the invention relates to a method for guiding and filling sacks, in particular plastic sacks at a filling station, and to an apparatus for carrying out this method.
  • DE-A-2 301 817 discloses a device with stations arranged on a circular circumference for producing gusseted bags and for opening, filling, closing and dispensing these bags.
  • the facility that transports the sacks through these stations consists of a turnstile with four sack chairs and four pairs of transport cheeks.
  • the sacks are guided from the production station to the delivery station on a circular path and, apart from the filling time, are kept constantly close to the opening edge by the same pair of transport cheeks.
  • This automatic sack-making device is relatively expensive.
  • it does not allow the use of prefabricated sacks by hand, since the operator would have to work in the rotating area of the transport device and this would be too dangerous.
  • the known machine can produce with high performance starting from gusseted hose. However, if it is important to fill finished bags in smaller quantities with different filling goods, the machine cannot be used optimally.
  • a sack filling machine is known in which the sack track comprises two semicircles which are connected by two straight-line tracks.
  • the empty sack is only formed in the machine.
  • the sacks remain on the same transport device all the way from the production of the empty sack to the dropping of the filled sack. Therefore, the transport conveyor must be returned in a circular arc after passing the filling station.
  • FR-A-2 267 241 describes a machine and a method in which the sacks used for packaging are produced in the machine from a roll of tubular film.
  • the sacks formed are conveyed from the manufacturing station into the filling station perpendicular to the sack plane. However, nothing has been said about the further movement of the filled sack from the filling station into the closing station or discharge station.
  • the device only one transport device between the sack manufacturing station and the filling station is specified.
  • a second bag transport device conveying between the filling station and a closing station is not known from this document.
  • the present invention has for its object to provide a method and an apparatus for guiding and filling sacks at a filling station, which allow a flexible and practically instant conversion to different sacks and goods, so that even with small quantities of a bag or .
  • Type of product can be worked without downtime.
  • the changeover should take effect without delay, so that no excess bags of one type are produced because there are still corresponding empty bags in the machine aisle.
  • the separation of the hanging station from the filling station and the functional separation of the two bag transport devices it is possible to quickly adapt to different filling goods and thus different bags without changing the device.
  • the operator can insert another type of sack from one work cycle to the next and switch the filler neck to a different filling material.
  • the separation of the stations ensures that the operator does not get into the path of movement of the first transport device when the empty sack is attached. Because the displacement path of the second bag transport device lies in the bag level of the filling station, the opening edge of the filled bags can be easily cleaned during transport to the closing station, since the entire length of the bag can be guided along a stationary air nozzle, brush, ionizing device, for example.
  • the sack level of the filling station is to be understood as the level given by the empty, unopened sack located in the filling station.
  • an automatic filling device for example that according to DE-PS 23 01 817, there are reduced manufacturing costs, since the device for the bag production and the turnstile for the bag transport are eliminated.
  • the first bag transport device comprises a transport jaw fixed on it and at least one movable on its transport jaw.
  • the movable transport jaws enable the transport device to be opened so that the empty sack can be conveniently inserted into the transport device and then clamped in by closing the movable transport jaw (s).
  • the infeed direction of the first web forms an angle of 90 ° with the second web and two transport jaws of the first bag transport device facing the filling station can be swung out to the side from the area of the bag width.
  • the suspended sack e.g. the gusseted sack
  • the suspended sack is clamped in the side area at a distance of, for example, 5 cm from the opening edge between one or two transport jaws, which are fixed on the transport device, and the two transport jaws that can be swung out to the side and transported as far as into the filling station, that the Sack is in the sack plane as defined above.
  • the empty sack is then gripped by clamping jaws of the filling station which also engage in the side area.
  • the first bag transport device then opens in such a way that the movable transport jaws swing out to the side. As a result, the empty sack is released by the first transport device so that it can return to the hanging station.
  • the first path between the hanging station and the filling station can be straight or circular.
  • the position of the operator on the hanging station is in any case on the side of the bag transport device which faces away from the filling station.
  • the filling station expediently comprises two pairs of jaws consisting of a stationary and a movable jaw, and the two stationary jaws at the end of the first path are designed as bag stops and the two movable jaws can be swung out of the entry area of the bag against the direction of entry.
  • the two swiveling clamping jaws are articulated above the edge of the sack opening, so that after swiveling up, not only is the entry area of the sack released, but the filled sack can also be moved out of the filling station in the sack level by the second sack transport device.
  • the first and the second web lie in a straight line one behind the other and the first bag transport device comprises a pair of transport jaws, at least one of which is displaceable transversely to the first web against the other.
  • the first and the second displacement path lie in the sack plane, ie there is no change of direction between the feeding of the empty sack and the discharge of the filled sack from the filling station.
  • the first bag transport device is simplified in that than the transport jaws can only be moved against each other, but cannot be pivoted.
  • the first and the second transport device can be displaceable in common mode by the same motor. However, it is also possible to provide separate drives for both transport devices.
  • the filling station expediently comprises two pairs of clamping jaws, each consisting of two movable clamping jaws, in which the jaws of both pairs of clamping jaws can be displaced or pivoted between a retracted or pivoted-out release position and an advanced or pivoted-in clamping position. Since the empty as well as the filled sack always remains in the sack level on the way to and from the filling station, the sack can be released or clamped by moving or pivoting the transport jaws away from the sack level or towards the sack level. As with all embodiments, the pairs of clamping jaws engage in the side region of the bag or gusseted bag.
  • the first bag transport device has a stop which projects beyond the clamping gap of the transport jaws and, if appropriate, two protective plates arranged under the clamping gap.
  • the empty sack is pushed up by the operator from below through the pinch gap to the stop, whereby the stop ensures an equal sack protrusion above the clamping jaws for all sacks and thus ensures trouble-free transfer of the sack to the filling station.
  • the two mudguards below the pinch gap allow the empty sack to be inserted, but prevent the operator from getting between the transport jaws with his fingers.
  • the stop preferably contains a switch which can be actuated by the top edge of the bag or the stop itself is designed as a switch which in turn controls the closing movement of the movable transport jaw (s).
  • the stop can consist, for example, of a web of angular cross-section attached to the fixed transport jaw made of a transparent material, such as acrylic glass, so that the operator can observe the introduction of the empty bag and in particular the stop of the top edge of the bag and thus the triggering of the closing movement of the transport jaws can.
  • a cleaning device is preferably attached above the second path between the filling station and the closing station.
  • This cleaning device which e.g. an air nozzle, brush or ionizing device is arranged in a stationary manner, since the full length of the gap to be cleaned at the edge of the bag opening is inevitably guided past the cleaning device by the bag transport to the closing device or welding device.
  • the cleaning device can therefore be made relatively simple and cost-saving.
  • the sealing station can be a stationary welding station.
  • the closing can also be done in such a way that the opening edge is passed through a continuous welding machine or a sewing machine.
  • a third transport device preferably a conveyor belt, is arranged below the delivery station and transversely to the second path. Since the delivery station is at a sufficient distance from the filling station, a transport device transversely to the second path can be provided, onto which the welded-on bags are steep, i.e., uncooled. can be set down without tilting, so that the hot weld is not yet stressed and can cool on the third transport device.
  • the device comprises a stationary filling station 1, a movable first transport device 2 for the empty bag and a movable second transport device 3 for the filled bag.
  • the transport device 2 can be moved along the straight path 4 perpendicular to the bag plane 30 between the hanging position shown in FIG. 1 and the filling station 1.
  • the second transport device 3 can be moved in the bag plane 30, i.e. the sack remains during transport with the transport device 3 in the plane 30, which is given by the empty, unopened sack located in the filling station 1.
  • the transport device 2 comprises a holder 8, on which a cheek 9 extending across the entire width of the gusseted bag 6 and somewhat beyond is firmly attached.
  • a short jaw 10 and 11 which extends only over the side fold area of the sack 6, is articulated, which can be pivoted outward from the clamping positions shown in FIG. 1 parallel to the jaw 9, the sack being released by the transport device 2.
  • the jaws 10 and 11 are pivotable by a pneumatic piston / cylinder unit 12 which is attached to the fixed jaw 9.
  • the transport jaws 10 and 11 are moved symmetrically to the central plane of the conveyor device 2.
  • the holder 8 of the empty bag transport device 2 is connected overall to a pneumatic piston / cylinder unit 14, through which the device 2 can be moved along the path 4 from the position shown into the filling station 1.
  • the stationary filling station 1 comprises a first pair of jaws 17 a , 17 b , a second pair of jaws 18 a , 18 b , a first suction nozzle holder 19 with a first suction nozzle 20, a second suction nozzle holder 21 with a second suction nozzle 22 and a filler neck 34 (FIG. 2) .
  • the first suction nozzle holder 19 is connected in an articulated manner to the pivotable clamping jaws 17 b and 18 b via two articulated rods 23, 24.
  • the second suction nozzle holder 21 is articulated via two further articulated rods 25 and 26 with the non-pivoting clamping jaws 17 a and 18 a .
  • the pivotable clamping jaws 17 b , 18 b can be pivoted out of the entry area of the empty sack 6, as shown in FIG. 2.
  • the pivoted-jaw 17 b, 18 b of the empty bag 6 with the first transport means 2 are moved into the filling station 1, until the side gusset portions at the top of the stationary clamping jaws 17 a and 18 a abuts.
  • the empty sack 6 is then located in the so-called sack level 30, in which it remains until it is released from the delivery station.
  • the clamping jaws 17 b and 18 b which can be pivoted by pneumatic piston / cylinder units 29 are then closed, as a result of which the empty sack is held in the filling station 1.
  • the jaws 10 and 11 of the transport device 2 are then swung out and the transport device 2 is moved back along the track 4 into the hanging position shown in FIG.
  • vacuum is applied to the suction nozzles 20 and 22 which are in contact with the outside of the bag walls.
  • the pairs of jaws are then brought together by pneumatic actuators (not shown), the linkage 23-26 moving apart the suction nozzles 20 and 22 which act on the wall of the bag near the opening edge, so that the bag is opened.
  • the jaw pairs 17 a , 17 b and 18 a , 18 b are moved apart again, and the vacuum at the nozzles 20 and 22 is released again. This tightens the opening edge of the filled sack. It is then gripped by the transport jaws 32, 33 of the second transport device 3, whereupon the clamping jaws 17 b and 18 b swivel up again, so that the filled sack is released by the station 1.
  • the sack is then moved by the second transport device 3 provided with a sack chair 35 along the straight path 5 into the stationary welding station 7, which is shown in FIG. 4 relating to another embodiment of the device and in which the sack is at a short distance along its opening edge is welded shut.
  • An air-blowing nozzle 13 is arranged in the sack plane 30 above the displacement path 5.
  • the nozzle 13 generates an air stream directed towards the bag gap above the transport jaws 32, 33, which blows away the residues of filling adhering there to the inside of the bag wall and thus creates the prerequisites for the formation of a durable welded connection or another closure.
  • the air flow generated by the nozzle 13 and directed towards the opening edge of the filled sack has a component which is opposite to the transport direction of the sack.
  • the bag 6 is placed and transported away from the bag chair 35 of the second transport device 3 onto a conveyor belt 27 without prior cooling, which is also shown in FIG.
  • the conveyor belt 27 extends at the touchdown point perpendicular to the sack
  • FIG. 2 The side view of Figure 2 shows the transport device 2 in the clamping area.
  • an angular stop web 15 is fixedly attached, which determines the sack protrusion above the jaws 9-11.
  • the angle stop 15 extends only over the central area of the jaw 9, so that the clamping jaws 17 a , 17 b and 18 a , 18 b of the filling station 1 can grasp the bag 6 in the side gusset area when it is moved into the filling station.
  • two fenders 16 are attached as finger protection when inserting the empty bag 6 into the gap between the jaws 9 and 10, 11.
  • the stop bar 15 can be designed as a switch that switches the pneumatic drive 12 for the closing movements of the pivotable transport jaws 10 and 11.
  • the embodiment shown in FIG. 3 differs from the embodiment according to FIGS. 1 and 2 essentially in that the displacement path 4 of the first transport device 2 for the empty bag between the hanging station shown in FIG. 3 and the filling station 1 is not rectilinear, but in the form of a circular arc.
  • the path 4 has the shape of a quarter-circle arc.
  • the empty bag transport device 2 can be pivoted with its holder 8 in the joint 28, the swivel drive again being supplied by a pneumatic motor 14.
  • the operator hanging the empty bags 6 in the transport device 2 is not, as in the embodiment according to FIG. 1, in front of the filling station, but laterally next to it.
  • FIG. 4 shows the stationary welding station 7 and the conveyor belt 27 running perpendicular to the transport path 5 for the removal of the filled, closed bags from the inventive one Contraption.
  • the first transport device 2 for the empty bag can also be moved along a straight path 4 between the illustrated hanging position and the filling station 1, which, like the path 5 of the second transport device 3, lies in the bag plane 30.
  • the operator stands to the side of the filling station 1.
  • the transport device 2 comprises a transport jaw 9 fixed to the holder 8 and pivotable jaws 10, 11, the swivel drive of which is supplied by the piston / cylinder unit 12.
  • the jaws 9 and 10, 11 engage at a distance from the opening edge of the side gusset bag, so that the side gusset area close to the opening edge for the attack of the jaw pairs 17 a . 17 b and 18 a , 18 b is free.
  • the transport device 2 can be moved in a known manner into the filling station 1 on a guide 31.
  • the second transport device 3 is essentially identical to the first transport device 2; only their displacement areas are offset from one another, and the device 3 has a bag chair, as in the embodiments according to FIGS. 2 and 4.
  • Both transport devices 2, 3 have their own drives, but it is also possible to couple both transport devices with the same drive, so that empty bag transport and full bag transport are carried out in the same cycle.
  • both jaws 17 a , 17 b and 18 a , 18 b of both pairs of jaws are pivotable between a vertical position (clamping position) and an inclined position (release position). The almost angled upward pivoting of a clamping jaw 17 b or 18 b shown in FIG. 2 is not necessary because the empty bag is guided in the bag plane 30 between the clamping jaws and not — as in the embodiment according to FIGS. 1 and 2 — perpendicular to the bag plane 30 .

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

Description

Die Erfindung betrifft ein Verfahren zur Führung und Füllung von Säcken, insbesondere Kunststoffsäcken an einer Füllstation, sowie eine Vorrichtung zur Durchführung dieses Verfahrens.The invention relates to a method for guiding and filling sacks, in particular plastic sacks at a filling station, and to an apparatus for carrying out this method.

Aus DE-A-2 301 817 ist eine Vorrichtung mit auf einem Kreisumfang angeordneten Stationen zum Herstellen von Seitenfaltensäcken und zum Öffnen, Füllen, Verschließen und Abgeben dieser Säcke bekannt. Die die Säcke durch diese Stationen transportierende Einrichtung besteht aus einem Drehkreuz mit vier Sackstühlen und vier Transportwangenpaaren. Die Säcke werden von der Herstellungsstation bis zur Abgabestation auf einer Kreisbahn geführt und dabei abgesehen von der Befüllungszeit ständig nahe an dem Öffnungsrand von demselben Transportwangenpaar gehalten. Diese automatische, die Sackherstellung umfassende Vorrichtung ist verhältnismäßig kostspielig. Außerdem gestattet sie nicht den Einsatz vorgefertigter Säcke von Hand, da der Bedienungsmann im Drehbereich der Transporteinrichtung hantieren müsste und dies zu gefährlich wäre. Die bekannte Maschine kann ausgehend von Seitenfaltenschlauch mit hoher Leistung produzieren. Wenn es jedoch darauf ankommt, fertige Säcke in geringeren Stückzahlen mit jeweils wechselnden Füllgütern zu befüllen, kann die Maschine nicht optimal eingesetzt werden.DE-A-2 301 817 discloses a device with stations arranged on a circular circumference for producing gusseted bags and for opening, filling, closing and dispensing these bags. The facility that transports the sacks through these stations consists of a turnstile with four sack chairs and four pairs of transport cheeks. The sacks are guided from the production station to the delivery station on a circular path and, apart from the filling time, are kept constantly close to the opening edge by the same pair of transport cheeks. This automatic sack-making device is relatively expensive. In addition, it does not allow the use of prefabricated sacks by hand, since the operator would have to work in the rotating area of the transport device and this would be too dangerous. The known machine can produce with high performance starting from gusseted hose. However, if it is important to fill finished bags in smaller quantities with different filling goods, the machine cannot be used optimally.

Aus FR-A-2 324 514 ist ein Sackfüllautomat bekannt, bei dem die Sackbahn zwei Halbkreise umfaßt, die durch zwei geradlinige Bahnstrecken verbunden sind. Der leere Sack wird erst in der Maschine gebildet. Die Säcke bleiben auf ihrem gesamten Weg von der Herstellung des Leersackes bis zum Abwurf des gefüllten Sackes an derselben Transporteinrichtung. Daher muß der Transportförderer nach dem Passieren der Füllstation wieder im Kreisbogen zurückgeführt werden.From FR-A-2 324 514 a sack filling machine is known in which the sack track comprises two semicircles which are connected by two straight-line tracks. The empty sack is only formed in the machine. The sacks remain on the same transport device all the way from the production of the empty sack to the dropping of the filled sack. Therefore, the transport conveyor must be returned in a circular arc after passing the filling station.

FR-A-2 267 241 beschreibt eine Maschine und ein Verfahren, bei dem die zur Verpackung dienenden Säcke in der Maschine aus einer Schlauchfolienrolle hergestellt werden. Die gebildeten Säcke werden senkrecht zur Sackebene von der Herstellungsstation in die Füllstation gefördert. Über die Weiterbewegung des gefüllten Sackes aus der Füll- in die Verschließstation bzw. Abwurfstation ist jedoch nichts ausgeführt. Vorrichtungsmäßig ist nur eine Transporteinrichtung zwischen Sackherstellungsstation und Füllstation angegeben. Eine zwischen der Füllstation und einer Verschließstation fördernde zweite Sacktransporteinrichtung ist aus dieser Schrift nicht bekannt.FR-A-2 267 241 describes a machine and a method in which the sacks used for packaging are produced in the machine from a roll of tubular film. The sacks formed are conveyed from the manufacturing station into the filling station perpendicular to the sack plane. However, nothing has been said about the further movement of the filled sack from the filling station into the closing station or discharge station. In terms of the device, only one transport device between the sack manufacturing station and the filling station is specified. A second bag transport device conveying between the filling station and a closing station is not known from this document.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Führung und Befüllung von Säcken an einer Füllstation zu schaffen, die eine flexible und praktisch sofortige Umstellung auf unterschiedliche Säcke und Füllgüter erlauben, so daß auch bei jeweils geringen Stückzahlen einer Sack-bzw. Füllgutart ohne Ausfallzeit gearbeitet werden kann. Insbesondere soll die Umstellung ohne Verzögerung wirksam werden, so daß keine überzählig gefüllten Säcke eines Typs produziert werden, weil sich noch entsprechende leere Säcke im Maschinengang befinden.The present invention has for its object to provide a method and an apparatus for guiding and filling sacks at a filling station, which allow a flexible and practically instant conversion to different sacks and goods, so that even with small quantities of a bag or . Type of product can be worked without downtime. In particular, the changeover should take effect without delay, so that no excess bags of one type are produced because there are still corresponding empty bags in the machine aisle.

Diese Aufgabe wird erfindungsgemäß durch ein Verfahren zur Führung und Füllung von Säcken an einer Füllstation gelöst, bei dem

  • a) der vorgefertigte leere Sack in einer Einhängstation von Hand in die Transportbacken einer ersten Transporteinrichtung eingehängt wird,
  • b) der eingehängte leere Sack durch die erste Transporteinrichtung von der Einhängstation geradlinig in der oder senkrecht zu der Sackebene oder kreisbogenförmig in die Füllstation transportiert wird,
  • c) der leere Sack durch Klemmbacken der Füllstation erfaßt wird,
  • d) der von den Klemmbacken der Füllstation erfaßte Sack durch Öffnen der Transportbacken der ersten Transporteinrichtung von dieser freigegeben wird,
  • e) der leere Sack geöffnet und mit einer vorgegebenen Menge Füllgut gefüllt wird und der Öffnungsrand des gefüllten Sackes wieder gestrafft wird,
  • f) der gefüllte Sack von den Transportbacken einer zweiten Transporteinrichtung erfaßt und von den Klemmbacken der Füllstation freigegeben wird, und
  • g) der gefüllte Sack durch die zweite Transporteinrichtung aus der Füllstation geradlinig in der Sackebene zu einer Verschließstation transportiert wird, wobei die erste und zweite Transporteinrichtung taktweise auf die Füllstation zu und von ihr wegfahren.
This object is achieved by a method for guiding and filling sacks at a filling station, in which
  • a) the prefabricated empty sack is hung by hand in a hanging station in the transport jaws of a first transport device,
  • b) the suspended empty sack is transported by the first transport device from the hanging station in a straight line in or perpendicular to the sack plane or in a circular arc into the filling station,
  • c) the empty sack is gripped by clamping the filling station,
  • d) the sack gripped by the clamping jaws of the filling station is released by opening the transport jaws of the first transport device,
  • e) the empty sack is opened and filled with a predetermined amount of filling material and the opening edge of the filled sack is tightened again,
  • f) the filled sack is gripped by the transport jaws of a second transport device and released by the clamping jaws of the filling station, and
  • g) the filled sack is transported by the second transport device from the filling station in a straight line in the sack plane to a closing station, the first and second transport devices moving cyclically towards and away from the filling station.

Die Vorrichtung zur Durchführung des Verfahrens hat

  • a) eine Füllstation mit einem Füllstutzen sowie Saugdüsen und Klemmbacken zum Erfassen, Öffnen und Straffziehen des Sacks,
  • b) eine erste, zwischen einer Einhängstation und der Füllstation verfahrbare Sacktransporteinrichtung mit Transportbacken für den Leersacktransport und
  • c) eine zweite, zwischen der Füllstation und einer Verschließstation verfahrbare Sacktransporteinrichtung mit Transportbacken und einem Sackstuhl für den Transport des gefüllten Sacks, wobei die beiden Sacktransporteinrichtungen taktweise auf die Füllstation zu und von der Füllstation wegfahren.
The device for performing the method has
  • a) a filling station with a filling nozzle as well as suction nozzles and clamping jaws for grasping, opening and tightening the sack,
  • b) a first, between a hanging station and the filling station movable bag transport device with transport jaws for the empty bag transport and
  • c) a second, between the filling station and a closing station movable sack transport device with transport jaws and a sack chair for transporting the filled sack, the two sack transport devices moving to and from the filling station in cycles.

Durch die abstandsmäßige Trennung der Einhängstation von der Füllstation und die funktionelle Trennung der beiden Sacktransporteinrichtungen ist eine schnelle Anpassung an unterschiedliche Füllgüter und damit unterschiedliche Säcke ohne Änderung der Vorrichtung möglich. Der Bedienungsmann kann von einem zum nächsten Arbeitstakt einen anderen Sacktyp einhängen und den Füllstutzen auf ein anderes Füllgut umschalten. Die Trennung der Stationen gewährleistet, daß der Bedienungsmann beim Einhängen des leeren Sackes nicht in die Bewegungsbahn der ersten Transporteinrichtung kommt. Dadurch, daß die Verschiebungsbahn der zweiten Sacktransporteinrichtung in der Sackebene der Füllstation liegt, kann der Öffnungsrand der gefüllten Sackes während des Transports zur Verschließstation leicht gereinigt werden, da der Rand auf seiner gesamten Länge z.B. an einer stationären Luftdüse, Bürste, Ionisiereinrichtung entlanggeführt werden kann. Unter der Sackebene der Füllstation ist die Ebene zu verstehen, die durch den leeren, ungeöffneten, in der Füllstation befindlichen Sack gegeben ist. Im Vergleich zu einer automatischen Füllvorrichtung, z.B. der nach der DE-PS 23 01 817 ergeben sich verringerte Herstellungskosten, da die Einrichtung für die Sackherstellung und das Drehkreuz für den Sacktransport wegfallen.Due to the separation of the hanging station from the filling station and the functional separation of the two bag transport devices, it is possible to quickly adapt to different filling goods and thus different bags without changing the device. The operator can insert another type of sack from one work cycle to the next and switch the filler neck to a different filling material. The separation of the stations ensures that the operator does not get into the path of movement of the first transport device when the empty sack is attached. Because the displacement path of the second bag transport device lies in the bag level of the filling station, the opening edge of the filled bags can be easily cleaned during transport to the closing station, since the entire length of the bag can be guided along a stationary air nozzle, brush, ionizing device, for example. The sack level of the filling station is to be understood as the level given by the empty, unopened sack located in the filling station. Compared to an automatic filling device, for example that according to DE-PS 23 01 817, there are reduced manufacturing costs, since the device for the bag production and the turnstile for the bag transport are eliminated.

Nach der bevorzugten Ausführungsform der Erfindung umfaßt die erste Sacktransporteinrichtung eine auf ihr feste und wenigstens eine auf ihr bewegliche Transportbacke. Die beweglichen Transportbacken ermöglichen das Öffnen der Transporteinrichtung, so daß der leere Sack bequem in die Transporteinrichtung eingeführt und dann durch das Schließen der beweglichen Transportbacke(n) eingeklemmt werden kann.According to the preferred embodiment of the invention, the first bag transport device comprises a transport jaw fixed on it and at least one movable on its transport jaw. The movable transport jaws enable the transport device to be opened so that the empty sack can be conveniently inserted into the transport device and then clamped in by closing the movable transport jaw (s).

Nach der bevorzugten Ausführungsform der Erfindung bildet die Einlaufrichtung der ersten Bahn mit der zweiten Bahn einen Winkel von 90° und sind zwei der Füllstation zugewandte Transportbacken der ersten Sacktransporteinrichtung aus dem Bereich der Sackbreite zur Seite ausschwenkbar. Der eingehängte Sack, z.B. der Seitenfaltensack, wird im Seitenbereich in einem Abstand, von z.B. 5 cm vom Öffnungsrand zwischen einer oder zwei Transportbacken, die auf der Transporteinrichtung fest angeordnet sind, und den beiden zur Seite ausschwenkbaren Transportbacken eingeklemmt und soweit in die Füllstation transportiert, daß sich der Sack in der Sackebene gemäß oben angegebener Definition befindet. Der leere Sack wird dann durch ebenfalls im Seitenbereich angreifende Klemmbacken der Füllstation erfaßt. Anschließend öffnet sich die erste Sacktransporteinrichtung in der Weise, daß die beweglichen Transportbacken zur Seite ausschwenken . Dadurch wird der leere Sack von der ersten Transporteinrichtung freigegeben, so daß diese in die Einhängstation zurückfahren kann. Dabei kann die erste Bahn zwischen der Einhängstation und der Füllstation geradlinig oder kreisbogenförmig sein. Die Position des Bedienungsmannes an der Einhängstation ist in jedem Falle auf der Seite der Sacktransporteinrichtung, die der Füllstation abgewandt ist.According to the preferred embodiment of the invention, the infeed direction of the first web forms an angle of 90 ° with the second web and two transport jaws of the first bag transport device facing the filling station can be swung out to the side from the area of the bag width. The suspended sack, e.g. the gusseted sack, is clamped in the side area at a distance of, for example, 5 cm from the opening edge between one or two transport jaws, which are fixed on the transport device, and the two transport jaws that can be swung out to the side and transported as far as into the filling station, that the Sack is in the sack plane as defined above. The empty sack is then gripped by clamping jaws of the filling station which also engage in the side area. The first bag transport device then opens in such a way that the movable transport jaws swing out to the side. As a result, the empty sack is released by the first transport device so that it can return to the hanging station. The first path between the hanging station and the filling station can be straight or circular. The position of the operator on the hanging station is in any case on the side of the bag transport device which faces away from the filling station.

Bei dieser Ausführungsform umfaßt die Füllstation zweckmäßigerweise zwei aüs einer stationären und einer beweglichen Klemmbacke bestehende Klemmbackenpaare und sind die beiden stationären Klemmbacken am Ende der ersten Bahn als Sackanschläge ausgebildet und die beiden beweglichen Klemmbacken aus dem Einfahrbereich des Sacks entgegen der Einfahrrichtung ausschwenkbar. Die beiden ausschwenkbaren Klemmbacken sind oberhalb des Sacköffnungsrandes angelenkt, so daß nach ihrem Hochschwenken nicht nur der Einfahrbereich des Sacks freigegeben ist, sondern der gefüllte Sack auch in der Sackebene durch die zweite Sacktransporteinrichtung aus der Füllstation herausgefahren werden kann.In this embodiment, the filling station expediently comprises two pairs of jaws consisting of a stationary and a movable jaw, and the two stationary jaws at the end of the first path are designed as bag stops and the two movable jaws can be swung out of the entry area of the bag against the direction of entry. The two swiveling clamping jaws are articulated above the edge of the sack opening, so that after swiveling up, not only is the entry area of the sack released, but the filled sack can also be moved out of the filling station in the sack level by the second sack transport device.

Nach einer anderen Ausführungsform der Erfindung liegen die erste und die zweite Bahn geradlinig hintereinander und umfaßt die erste Sacktransporteinrichtung ein Paar Transportbacken, von denen wenigstens eine quer zu der ersten Bahn gegen die andere verschieblich ist. Bei dieser Ausführungsform liegen die erste und die zweite Verschiebungsbahn in der Sackebene, d.h. zwischen der Zuführung des Leersackes und der Abführung des gefüllten Sackes aus der Füllstation erfolgt keine Richtungsänderung. Hierbei ist die erste Sacktransporteinrichtung insofern vereinfacht, als die Transportbacken nur gegeneinander verschieblich, jedoch nicht schwenkbar sind. Die erste und die zweite Transporteinrichtung können durch denselben Motor im Gleichtakt verschiebbar sein. Es ist jedoch auch möglich, getrennte Antriebe für beide Transporteinrichtungen vorzusehen.According to another embodiment of the invention, the first and the second web lie in a straight line one behind the other and the first bag transport device comprises a pair of transport jaws, at least one of which is displaceable transversely to the first web against the other. In this embodiment, the first and the second displacement path lie in the sack plane, ie there is no change of direction between the feeding of the empty sack and the discharge of the filled sack from the filling station. Here, the first bag transport device is simplified in that than the transport jaws can only be moved against each other, but cannot be pivoted. The first and the second transport device can be displaceable in common mode by the same motor. However, it is also possible to provide separate drives for both transport devices.

Zweckmäßigerweise umfaßt die Füllstation bei dieser Ausführungsform zwei aus je zwei beweglichen Klemmbacken bestehende Klemmbackenpaare, bei denen die Backen beider Klemmbackenpaare zwischen einer zurückgezogenen oder ausgeschwenkten Freigabeposition und einer vorgeschobenen bzw. eingeschwenkten Klemmposition verschiebbar bzw. verschwenkbar sind. Da der leere wie auch der gefüllte Sack auf dem Wege zur und von der Füllstation immer in der Sackebene verbleibt, kann die Freigabe bzw. Einklemmung des Sackes durch die Verschiebung bzw. Verschwenkung der Transportbacken von der Sackebene weg bzw. zur Sackebene hin erfolgen. Wie bei allen Ausführungsformen greifen die Klemmbackenpaare im Seitenbereich des Sackes bzw. Seitenfaltensackes an.In this embodiment, the filling station expediently comprises two pairs of clamping jaws, each consisting of two movable clamping jaws, in which the jaws of both pairs of clamping jaws can be displaced or pivoted between a retracted or pivoted-out release position and an advanced or pivoted-in clamping position. Since the empty as well as the filled sack always remains in the sack level on the way to and from the filling station, the sack can be released or clamped by moving or pivoting the transport jaws away from the sack level or towards the sack level. As with all embodiments, the pairs of clamping jaws engage in the side region of the bag or gusseted bag.

Nach der bevorzugten Ausführungsform weist die erste Sacktransporteinrichtung einen den Einklemmspalt der Transportbacken überragenden Anschlag und gegebenenfalls zwei unter dem Einklemmspalt angeordnete Schutzbleche auf. Der leere Sack wird vom Bedienungsmann von unten durch den Einklemmspalt bis an den Anschlag hochgeschoben, wobei der Anschlag bei allen Säcken einen gleichen Sacküberstand oberhalb der Klemmbacken und damit eine störungsfreie Übergabe des Sackes an die Füllstation gewährleistet. Die beiden Schutzbleche unterhalb des Einklemmspalts lassen zwar die Einführung des leeren Sackes zu, verhindern aber, daß der Bedienungsmann mit seinen Fingern zwischen die Transportbacken kommen kann. Vorzugsweise enthält der Anschlag einen durch die Sackoberkante betätigbaren Schalter oder ist der Anschlag selbst als Schalter ausgebildet, der seinerseits die Schließbewegung der beweglichen Transportbacke(n) auslöst. Der Anschlag kann z.B. aus einem auf der festen Transportbacke angebrachten Steg von winkelförmigem Querschnitt aus einem durchsichtigen Material, wie z.B. Acrylglas, bestehen, so daß der Bedienungsmann die Einführung des leeren Sackes und insbesondere den Anschlag der Sackoberkante und damit die Auslösung der Schließbewegung der Transportbacken beobachten kann.According to the preferred embodiment, the first bag transport device has a stop which projects beyond the clamping gap of the transport jaws and, if appropriate, two protective plates arranged under the clamping gap. The empty sack is pushed up by the operator from below through the pinch gap to the stop, whereby the stop ensures an equal sack protrusion above the clamping jaws for all sacks and thus ensures trouble-free transfer of the sack to the filling station. The two mudguards below the pinch gap allow the empty sack to be inserted, but prevent the operator from getting between the transport jaws with his fingers. The stop preferably contains a switch which can be actuated by the top edge of the bag or the stop itself is designed as a switch which in turn controls the closing movement of the movable transport jaw (s). triggers. The stop can consist, for example, of a web of angular cross-section attached to the fixed transport jaw made of a transparent material, such as acrylic glass, so that the operator can observe the introduction of the empty bag and in particular the stop of the top edge of the bag and thus the triggering of the closing movement of the transport jaws can.

Vorzugsweise ist ferner oberhalb der zweiten Bahn zwischen der Füllstation und der Verschließstation eine Reinigungseinrichtung angebracht. Diese Reinigungseinrichtung, die z.B. eine Luftdüse, Bürste oder Ionisiereinrichtung sein kann, ist stationär angeordnet, da der zu reinigende Spalt am Sacköffnungsrand in seiner vollen Länge durch den Sacktransport zur Verschließeinrichtung bzw. Verschweißeinrichtung zwangsläufig an der Reinigungseinrichtung vorbeigeführt wird. Die Reinigungseinrichtung kann daher relativ einfach und kostensparend ausgeführt sein. Die Verschließstation kann eine stationäre Schweißstation sein. Das Verschließen kann auch in der Weise erfolgen, daß der Öffnungsrand durch eine Durchlaufschweißmaschine oder eine Nähmaschine geführt wird.Furthermore, a cleaning device is preferably attached above the second path between the filling station and the closing station. This cleaning device, which e.g. an air nozzle, brush or ionizing device is arranged in a stationary manner, since the full length of the gap to be cleaned at the edge of the bag opening is inevitably guided past the cleaning device by the bag transport to the closing device or welding device. The cleaning device can therefore be made relatively simple and cost-saving. The sealing station can be a stationary welding station. The closing can also be done in such a way that the opening edge is passed through a continuous welding machine or a sewing machine.

Nach der bevorzugten Ausführungsform der Erfindung ist unterhalb der Abgabestation eine quer zur zweiten Bahn fördernde dritte Transporteinrichtung, vorzugsweise ein Förderband angeordnet. Da die Abgabestation von der Füllstation genügend Abstand hat, kann eine quer zur zweiten Bahn fördernde Transporteinrichtung vorgesehen werden, auf welche die zugeschweißten Säcke ungekühlt steil, d.h. ohne Kippung abgesetzt werden können, so daß die heiße Schweißnaht noch nicht beansprucht wird und auf der dritten Transporteinrichtung abkühlen kann.According to the preferred embodiment of the invention, a third transport device, preferably a conveyor belt, is arranged below the delivery station and transversely to the second path. Since the delivery station is at a sufficient distance from the filling station, a transport device transversely to the second path can be provided, onto which the welded-on bags are steep, i.e., uncooled. can be set down without tilting, so that the hot weld is not yet stressed and can cool on the third transport device.

Drei Ausführungsformen der erfindungsgemäßen Vorrichtung werden nachfolgend an Hand der Zeichnung näher beschrieben. Es zeigen

  • Figur 1 die Draufsicht einer ersten Ausführungsform der erfindungsgemäßen Vorrichtung in vereinfachter Darstellung;
  • Figur 2 eine Seitenansicht der Vorrichtung nach Figur 1 in Richtung der Pfeile II-II;
  • Figur 3 die Draufsicht einer zweiten Ausführungsform der erfindungsgemäßen Vorrichtung in vereinfachter Darstellung;
  • Figur 4 die Seitenansicht der Vorrichtung nach Figur 3, die auch die Schweißstation zeigt; und
  • Figur 5 die Draufsicht einer dritten Ausführungsform der erfindungsgemäßen Vorrichtung in vereinfachter Darstellung.
Three embodiments of the device according to the invention are described below with reference to the drawing. It demonstrate
  • Figure 1 is a top view of a first embodiment of the device according to the invention in a simplified representation;
  • Figure 2 is a side view of the device of Figure 1 in the direction of arrows II-II;
  • Figure 3 is a plan view of a second embodiment of the device according to the invention in a simplified representation;
  • Figure 4 is a side view of the device of Figure 3, which also shows the welding station; and
  • Figure 5 is a top view of a third embodiment of the device according to the invention in a simplified representation.

Bei der in Figur 1 gezeigten Ausführungsform umfaßt die Vorrichtung eine stationäre Befüllstation 1, einen verfahrbare erste Transporteinrichtung 2 für den Leersack und eine verfahrbare zweite Transporteinrichtung 3 für den befüllten Sack. Die Transporteinrichtung 2 ist längs der geradlinigen Bahn 4 senkrecht zur Sackebene 30 zwischen der in Figur 1 dargestellten Einhängposition und der Befüllstation 1 verfahrbar. Die zweite Transporteinrichtung 3 ist in der Sackebene 30 verfahrbar, d.h. der Sack verbleibt beim Transport mit der Transporteinrichtung 3 in der Ebene 30, die durch den in der Befüllstation 1 befindlichen, leeren, ungeöffneten Sack gegeben ist.In the embodiment shown in FIG. 1, the device comprises a stationary filling station 1, a movable first transport device 2 for the empty bag and a movable second transport device 3 for the filled bag. The transport device 2 can be moved along the straight path 4 perpendicular to the bag plane 30 between the hanging position shown in FIG. 1 and the filling station 1. The second transport device 3 can be moved in the bag plane 30, i.e. the sack remains during transport with the transport device 3 in the plane 30, which is given by the empty, unopened sack located in the filling station 1.

Die Transporteinrichtung 2 umfaßt einen Halter 8, an dem eine über die gesamte Breite des Seitenfaltensacks 6 und etwas darüber hinaus reichende Backe 9 fest angebracht ist. An den beiden Enden der Backe 9 ist je eine kurze, nur über den Seitenfaltenbereich des Sackes 6 reichende Backe 10 bzw. 11 angelenkt, die aus den zur Backe 9 parallelen, in Figur 1 dargestellten Klemmpositionen nach außen schwenkbar ist, wobei der Sack von der Transporteinrichtung 2 freigegeben wird. Die Backen 10 und 11 sind durch eine pneumatische Kolben/Zylinder-Einheit 12 schwenkbar, die an der festen Backe 9 angebracht ist. Dabei werden die Transportbacken 10 und 11 symmetrisch zur Mittelebene der Trnaporteinrichtung 2 bewegt. Der Halter 8 der Leersack-Transporteinrichtung 2 ist insgesamt an eine pneumatische Kolben/Zylinder-Einheit 14 angeschlossen, durch welche die Einrichtung 2 längs der Bahn 4 aus der dargestellten Position in die Befüllstation 1 verfahren werden kann.The transport device 2 comprises a holder 8, on which a cheek 9 extending across the entire width of the gusseted bag 6 and somewhat beyond is firmly attached. At the two ends of the jaw 9, a short jaw 10 and 11, which extends only over the side fold area of the sack 6, is articulated, which can be pivoted outward from the clamping positions shown in FIG. 1 parallel to the jaw 9, the sack being released by the transport device 2. The jaws 10 and 11 are pivotable by a pneumatic piston / cylinder unit 12 which is attached to the fixed jaw 9. The transport jaws 10 and 11 are moved symmetrically to the central plane of the conveyor device 2. The holder 8 of the empty bag transport device 2 is connected overall to a pneumatic piston / cylinder unit 14, through which the device 2 can be moved along the path 4 from the position shown into the filling station 1.

Die stationäre Befüllstation 1 umfaßt ein erstes Klemmbackenpaar 17a,17b, ein zweites Klemmbackenpaar 18a,18b, einen ersten Saugdüsenhalter 19 mit einer ersten Saugdüse 20, einen zweiten Saugdüsenhalter 21 mit einer zweiten Saugdüse 22 sowie einen Füllstutzen 34 (Figur 2). Der erste Saugdüsenhalter 19 ist über zwei Gelenkstangen 23,24 mit den schwenkbaren Klemmbacken 17b bzw. 18b gelenkig verbunden. Der zweite Saugdüsenhalter 21 ist über zwei weitere Gelenkstangen 25 und 26 mit den unschwenkbaren Klemmbacken 17a bzw. 18a gelenkig verbunden. Während die feststehenden Klemmbacken 17a,18a ihre aus Figur 2 erkennbare vertikale Lage beibehalten, können die schwenkbaren Klemmbacken 17b, 18b aus dem Einfahrbereich des leeren Sackes 6 ausgeschwenkt werden, wie dies in Figur 2 dargestellt ist. Bei ausgeschwenkten Klemmbacken 17b,18b kann der leere Sack 6 mit der ersten Transporteinrichtung 2 in die Befüllstation 1 eingefahren werden, bis er im Seitenfaltenbereich oben an den stationären Klemmbakken 17a und 18a anschlägt. Der leere Sack 6 befindet sich dann in der sogenannten Sackebene 30, in der er bis zur Abgabe aus der Abgabestation verbleibt. Die durch pneumatische Kolben/Zylinder-Einheiten 29 schwenkbaren Klemmbacken 17b und 18b werden dann geschlossen, wodurch der leere Sack in der Befüllstation 1 gehalten wird. Die Backen 10 und 11 der Transporteinrichtung 2 werden dann ausgeschwenkt, und die Transporteinrichtung 2 wird längs der Bahn 4 in die in Figur 1 dargestellte Einhängposition zurückgefahren. Nach dem Schließen der Klemmbackenpaare 17a,17b und 18a,18b wird Vakuum an die den Sackwandungen außen anliegenden Saugdüsen 20 und 22 angelegt. Die Klemmbackenpaare werden dann durch pneumatische Stellglieder (nicht dargestellt) einander genähert, wobei das Gestänge 23-26 die nahe dem Öffnungsrand an den Sackwandungen angreifenden Saugdüsen 20 und 22 auseinanderbewegt, damit der Sack geöffnet wird. Nach dem Befüllen des Sackes werden die Klemmbackenpaare 17a,17b und 18a,18b wieder auseinandergefahren, und das an den Düsen 20 und 22 liegende Vakuum wird wieder aufgehoben. Der Öffnungsrand des befüllten Sackes wird dadurch gestrafft. Er wird dann von den Transportbacken 32,33 der zweiten Transporteinrichtung 3 erfaßt, worauf die Klemmbacken 17b und 18b wieder hochschwenken, so daß der gefüllte Sack von der Station 1 freigegeben wird. Der Sack wird dann durch die mit einem Sackstuhl 35 versehene zweite Transporteinrichtung 3 längs der geradlinigen Bahn 5 in die stationäre Schweißstation 7 gefahren, die in der eine andere Ausführungsform der Vorrichtung betreffenden Figur 4 dargestellt ist und in der der Sack in geringem Abstand längs seines Öffnungsrandes zugeschweißt wird. In der Sackebene 30 oberhalb der Verschiebungsbahn 5 ist eine Luftblasdüse 13 angeordnet. Die Düse 13 erzeugt einen auf den Sackspalt oberhalb der Transportbacken 32,33 gerichteten Luftstrom, der die dort an der Sackwandinnenseite anhaftenden Füllgutreste wegbläst und damit die Voraussetzung für die Bildung einer haltbaren Schweißverbindung oder eines anderen Verschlusses schafft. Der von der Düse 13 erzeugte, auf den Offnungsrand des befüllten Sackes gerichtete Luftstrom hat eine der Transportrichtung des Sackes entgegengerichtete Komponente. Der Sack 6 wird ohne vorherige Abkühlung vom Sackstuhl 35 der zweiten Transporteinrichtung 3 auf ein Förderband 27 abgesetzt und abtransportiert, das ebenfalls in Figur 4 dargestellt ist. Das Förderband 27 erstreckt sich an der Aufsetzstelle senkrecht zur Sackebene 30 bzw. Transportbahn 5.The stationary filling station 1 comprises a first pair of jaws 17 a , 17 b , a second pair of jaws 18 a , 18 b , a first suction nozzle holder 19 with a first suction nozzle 20, a second suction nozzle holder 21 with a second suction nozzle 22 and a filler neck 34 (FIG. 2) . The first suction nozzle holder 19 is connected in an articulated manner to the pivotable clamping jaws 17 b and 18 b via two articulated rods 23, 24. The second suction nozzle holder 21 is articulated via two further articulated rods 25 and 26 with the non-pivoting clamping jaws 17 a and 18 a . While the fixed clamping jaws 17 a , 18 a retain their vertical position which can be seen in FIG. 2, the pivotable clamping jaws 17 b , 18 b can be pivoted out of the entry area of the empty sack 6, as shown in FIG. 2. In the pivoted-jaw 17 b, 18 b of the empty bag 6, with the first transport means 2 are moved into the filling station 1, until the side gusset portions at the top of the stationary clamping jaws 17 a and 18 a abuts. The empty sack 6 is then located in the so-called sack level 30, in which it remains until it is released from the delivery station. The clamping jaws 17 b and 18 b which can be pivoted by pneumatic piston / cylinder units 29 are then closed, as a result of which the empty sack is held in the filling station 1. The jaws 10 and 11 of the transport device 2 are then swung out and the transport device 2 is moved back along the track 4 into the hanging position shown in FIG. After the clamping jaw pairs 17 a , 17 b and 18 a , 18 b have been closed , vacuum is applied to the suction nozzles 20 and 22 which are in contact with the outside of the bag walls. The pairs of jaws are then brought together by pneumatic actuators (not shown), the linkage 23-26 moving apart the suction nozzles 20 and 22 which act on the wall of the bag near the opening edge, so that the bag is opened. After the sack has been filled, the jaw pairs 17 a , 17 b and 18 a , 18 b are moved apart again, and the vacuum at the nozzles 20 and 22 is released again. This tightens the opening edge of the filled sack. It is then gripped by the transport jaws 32, 33 of the second transport device 3, whereupon the clamping jaws 17 b and 18 b swivel up again, so that the filled sack is released by the station 1. The sack is then moved by the second transport device 3 provided with a sack chair 35 along the straight path 5 into the stationary welding station 7, which is shown in FIG. 4 relating to another embodiment of the device and in which the sack is at a short distance along its opening edge is welded shut. An air-blowing nozzle 13 is arranged in the sack plane 30 above the displacement path 5. The nozzle 13 generates an air stream directed towards the bag gap above the transport jaws 32, 33, which blows away the residues of filling adhering there to the inside of the bag wall and thus creates the prerequisites for the formation of a durable welded connection or another closure. The air flow generated by the nozzle 13 and directed towards the opening edge of the filled sack has a component which is opposite to the transport direction of the sack. The bag 6 is placed and transported away from the bag chair 35 of the second transport device 3 onto a conveyor belt 27 without prior cooling, which is also shown in FIG. The conveyor belt 27 extends at the touchdown point perpendicular to the sack plane 30 or transport path 5.

Die Seitenansicht der Figur 2 zeigt die Transporteinrichtung 2 im Klemmbereich. Auf der festen Transportbacke 9 ist ein winkelförmiger Anschlagsteg 15 fest angebracht, der den Sacküberstand oberhalb der Klemmbacken 9-11 bestimmt. Der Winkelanschlag 15 erstreckt sich nur über den mittleren Bereich der Backe 9, so daß die Klemmbacken 17a,17b und 18a,18b der Befüllstation 1 den Sack 6 im Seitenfaltenbereich fassen können, wenn dieser in die Befüllstation eingefahren ist. Unterhalb der Backen 9-11 sind zwei Schutzbleche 16 als Fingerschutz beim Einführen des leeren Sackes 6 in den Spalt zwischen den Backen 9 und 10,11 angebracht. Der Anschlagsteg 15 kann als Schalter ausgebildet sein, der den pneumatischen Antrieb 12 für die Schließbewegungen der schwenkbaren Transportbacken 10 und 11 schaltet.The side view of Figure 2 shows the transport device 2 in the clamping area. On the fixed transport jaw 9, an angular stop web 15 is fixedly attached, which determines the sack protrusion above the jaws 9-11. The angle stop 15 extends only over the central area of the jaw 9, so that the clamping jaws 17 a , 17 b and 18 a , 18 b of the filling station 1 can grasp the bag 6 in the side gusset area when it is moved into the filling station. Below the jaws 9-11, two fenders 16 are attached as finger protection when inserting the empty bag 6 into the gap between the jaws 9 and 10, 11. The stop bar 15 can be designed as a switch that switches the pneumatic drive 12 for the closing movements of the pivotable transport jaws 10 and 11.

Die in Figur 3 gezeigte Ausführungsform unterscheidet sich von der Ausführungsform nach den Figuren 1 und 2 im wesentlichen dadurch, daß die Verschiebungsbahn 4 der ersten Transporteinrichtung 2 für den Leersack zwischen der in Figur 3 gezeigten Einhängstation und der Befüllstation 1 nicht geradlinig, sondern kreisbogenförmig ist. Bei dieser Ausführungsform hat die Bahn 4 die Form eines Viertelkreisbogens. Die Leersack-Transporteinrichtung 2 ist mit ihrem Halter 8 in dem Gelenk 28 schwenkbar, wobei der Schwenkantrieb wieder von einem Pneumatik-Motor 14 geliefert wird. Der die Leersäcke 6 in die Transporteinrichtung 2 einhängende Bedienungsmann steht nicht wie bei der Ausführungsform nach Figur 1 frontal vor der Befüllstation, sondern seitlich neben dieser.The embodiment shown in FIG. 3 differs from the embodiment according to FIGS. 1 and 2 essentially in that the displacement path 4 of the first transport device 2 for the empty bag between the hanging station shown in FIG. 3 and the filling station 1 is not rectilinear, but in the form of a circular arc. In this embodiment, the path 4 has the shape of a quarter-circle arc. The empty bag transport device 2 can be pivoted with its holder 8 in the joint 28, the swivel drive again being supplied by a pneumatic motor 14. The operator hanging the empty bags 6 in the transport device 2 is not, as in the embodiment according to FIG. 1, in front of the filling station, but laterally next to it.

Figur 4 zeigt die stationäre Schweißstation 7 und das senkrecht zur Transportbahn 5 verlaufende Transportband 27 für den Abtransport der befüllten, verschlossenen Säcke aus der erfindungsgemäßen Vorrichtung.FIG. 4 shows the stationary welding station 7 and the conveyor belt 27 running perpendicular to the transport path 5 for the removal of the filled, closed bags from the inventive one Contraption.

Bei der in Figur 5 gezeigten Ausführungsform der erfindungsgemäßen Vorrichtung ist die erste Transporteinrichtung 2 für den Leersack zwischen der dargestellten Einhängposition und der Befüllstation 1 ebenfalls längs einer geradlinigen Bahn 4 verfahrbar, die ebenso wie die Bahn 5 der zweiten Transporteinrichtung 3 in der Sackebene 30 liegt. Auch hier steht der Bedienungsmann seitlich neben der Befüllstation 1. Die Transporteinrichtung 2 umfaßt eine an dem Halter 8 fest angebrachte Transportbacke 9 und verschwenkbare Backen 10,11, deren Schwenkantrieb durch die Kolben/Zylinder-Einheit 12 geliefert wird. Die Backen 9 und 10,11 greifen mit Abstand vom Öffnungsrand des Seitenfaltensackes an, so daß der Seitenfaltenbereich nahe am Öffnungsrand für den Angriff der Klemmbackenpaare 17a. 17b und 18a,18b frei ist. Die Transporteinrichtung 2 ist auf einer Führung 31 in bekannter Weise in die Befüllstation 1 verfahrbar. Die zweite Transporteinrichtung 3 ist im wesentlichen mit der ersten Transporteinrichtung 2 identisch; lediglich ihre Verschiebungsbereiche sind gegeneinander versetzt, und die Einrichtung 3 hat wie bei den Ausführungsformen nach den Figuren 2 und 4 einen Sackstuhl. Beide Transporteinrichtungen 2,3 haben eigene Antriebe, jedoch ist es auch möglich, beide Transporteinrichtungen mit dem gleichen Antrieb zu koppeln, so daß Leersacktransport und Vollsacktransport taktgleich erfolgen. Bei dieser Ausführungsform sind beide Klemmbacken 17a,17b bzw. 18a,18b beider Klemmbackenpaare zwischen einer vertikalen Stellung (Klemmposition) und einer Schrägstellung (Freigabeposition) schwenkbar. Das in Figur 2 gezeigte fast winklige Hochschwenken einer Klemmbacke 17b bzw. 18b ist nicht erforderlich, weil der Leersack in der Sackebene 30 zwischen die Klemmbacken geführt wird und nicht - wie bei der Ausführungsform nach den Figuren 1 und 2 - senkrecht zur Sackebene 30.In the embodiment of the device according to the invention shown in FIG. 5, the first transport device 2 for the empty bag can also be moved along a straight path 4 between the illustrated hanging position and the filling station 1, which, like the path 5 of the second transport device 3, lies in the bag plane 30. Here, too, the operator stands to the side of the filling station 1. The transport device 2 comprises a transport jaw 9 fixed to the holder 8 and pivotable jaws 10, 11, the swivel drive of which is supplied by the piston / cylinder unit 12. The jaws 9 and 10, 11 engage at a distance from the opening edge of the side gusset bag, so that the side gusset area close to the opening edge for the attack of the jaw pairs 17 a . 17 b and 18 a , 18 b is free. The transport device 2 can be moved in a known manner into the filling station 1 on a guide 31. The second transport device 3 is essentially identical to the first transport device 2; only their displacement areas are offset from one another, and the device 3 has a bag chair, as in the embodiments according to FIGS. 2 and 4. Both transport devices 2, 3 have their own drives, but it is also possible to couple both transport devices with the same drive, so that empty bag transport and full bag transport are carried out in the same cycle. In this embodiment, both jaws 17 a , 17 b and 18 a , 18 b of both pairs of jaws are pivotable between a vertical position (clamping position) and an inclined position (release position). The almost angled upward pivoting of a clamping jaw 17 b or 18 b shown in FIG. 2 is not necessary because the empty bag is guided in the bag plane 30 between the clamping jaws and not — as in the embodiment according to FIGS. 1 and 2 — perpendicular to the bag plane 30 .

Claims (11)

  1. Method for conducting and filling bags at a filling station comprising
    a) manually suspending the prefabricated empty bag in a suspension station into the conveying jaws of a first conveying device,
    b) conveying the suspended empty bag by the first conveying device from the suspension station into the filling station either in a straight line in the bag plane or at a right angle to the bag plane or circularly,
    c) gripping the empty bag by clamping jaws of the filling station,
    d) releasing the bag, gripped by the clamping jaws of the filling station, from the conveying device by opening the conveying jaws of the conveying device,
    e) opening the empty bag and filling it with a preset amount of filling material and tightening the mouth rim of the filled bag,
    f) gripping the filled bag by the conveying jaws of a second conveying device and releasing it from the clamping jaws of the filling station, and
    g) conveying the filled bag by the second conveying device from the filling station to a sealing station in a straight line in the bag plane, said first and second conveying devices running in phase towards and off the filling station, respectively.
  2. Apparatus for carrying out the method according to claim 1, comprising
    a) a filling station (1) with a filling spout (34) and suction nozzles (20,22) and gripping jaws (17a,17b,18a,18b) for gripping, opening and tightening the bag (6),
    b) a first bag conveying device (2) adapted to be conveyed between a suspension station and the filling station (1) and having conveying jaws (9-11) for conveying the empty bag, and
    c) a second bag conveying device (3) adapted to be conveyed between the filling station (1) and a sealing station and having conveying jaws (32,33) and a bag seat (35) for conveying the filled bag (6), said bag conveying devices (2,3) running in phase towards and off the filling station (1).
  3. Apparatus according to claim 2, characterized in that the first bag conveying device (2) comprises a conveying jaw (9) fixed on said device (2) and at least one conveying jaw (10,11) movable on said device.
  4. Apparatus according to claim 2 or 3, characterized in that the two conveying jaws (10,11) of the first conveying device (2) facing the filling station (1) can be laterally swung out of the range of the bag width.
  5. Apparatus according to claim 4, characterized in that the filling station (1) comprises two pairs of clamping jaws (17a,17b and 18a,18b) each of them consisting of a stationary clamping jaw and a movable clamping jaw, both stationary clamping jaws (17a,18a) are formed as bag stops at the end of a first path (4), and both movable clamping jaws (17b,18b) can be swung out of the run-in range of the bag (6) opposite to the run-in direction.
  6. Apparatus according to claim 2 or 3, characterized in that the first and the second path (4 and 5) lie in the bag plane (30) in a straight line one behind the other, and the first bag conveying device (2) comprises a pair of conveying jaws (9,10) at least one of which is displaceable with respect to the other transversely to the first path (4).
  7. Apparatus according to claim 6, characterized in that the filling station (1) comprises two pairs of clamping jaws (17a,17b,18a,18b) each of them consisting of two movable clamping jaws, the jaws of both pairs of clamping jaws are adapted to be displaced or swung between a retracted or swung-out release position and an advanced or swung-in clamping position.
  8. Apparatus according to one of the claims 2 to 7, characterized in that the first bag conveying device (2) comprises a stop (15) projecting over the clamping gap of the conveying jaws (9-11) and two guard plates (16) arranged below the clamping gap.
  9. Apparatus according to claim 8, characterized in that the stop (15) comprises a switch or is formed as a switch which trips the closing movement of the movable conveying jaw(s) (10,11).
  10. Apparatus according to one of the claims 2 to 9, characterized in that a dusting device (13) is arranged above the second path (5) between the filling station (1) and the sealing station (7).
  11. Apparatus according to one of the claims 2 to 10, characterized in that a third conveying device (27), preferably a conveyer belt is placed below the discharge station, said third device being arranged to convey transversely to the second path (5).
EP19880106967 1988-04-30 1988-04-30 Method and apparatus for introducing bags to a filling station Expired - Lifetime EP0340315B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8888106967T DE3882697D1 (en) 1988-04-30 1988-04-30 METHOD AND DEVICE FOR GUIDING BAGS AT A FILLING STATION.
EP19880106967 EP0340315B1 (en) 1988-04-30 1988-04-30 Method and apparatus for introducing bags to a filling station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19880106967 EP0340315B1 (en) 1988-04-30 1988-04-30 Method and apparatus for introducing bags to a filling station

Publications (2)

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EP0340315A1 EP0340315A1 (en) 1989-11-08
EP0340315B1 true EP0340315B1 (en) 1993-07-28

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EP19880106967 Expired - Lifetime EP0340315B1 (en) 1988-04-30 1988-04-30 Method and apparatus for introducing bags to a filling station

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DE (1) DE3882697D1 (en)

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US11591123B2 (en) 2018-02-19 2023-02-28 Windmöller & Hölscher Kg Filling device and method for filling bags with a respective unsealed upper end

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IT1280332B1 (en) * 1995-06-01 1998-01-15 Marco Santucci MECHANISM FOR AUTOMATIC HANDLING OF BAGS TO BE FILLED INTO BAG MACHINES
BE1020345A5 (en) * 2012-05-25 2013-08-06 Atla Con Bvba FILLING AND WELDING DEVICE AND METHOD FOR FILLING AND SEALING A BAG.
CN108812076B (en) * 2018-09-11 2024-04-09 大兴安岭天锦食品有限公司 Edible fungus cultivation matrix bag fixing device
CN114771967B (en) * 2022-05-17 2024-02-09 南通优护优家卫生用品有限公司 Material receiving device for bagged medical lubricant filling equipment
CN115339665B (en) * 2022-08-03 2023-10-24 黄河机械有限责任公司 Automatic silt bagging machine
CN115504033A (en) * 2022-10-21 2022-12-23 湖南郴州粮油机械有限公司 Bag clamping and filling device for full-automatic packaging machine
CN116639299A (en) * 2023-07-26 2023-08-25 四川远方云天食品科技有限公司 Positioning type hotpot condiment filling machine capable of eliminating filling errors

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FR2324514A1 (en) * 1974-01-11 1977-04-15 Ok Tekhnolog Product packing system into flexible tubes - has chain with mandrels onto which tube sections are drawn
DE2418228C3 (en) * 1974-04-13 1978-10-05 Haver & Boecker, 4740 Oelde Machine for making and filling plastic bags or sacks
EP0237947B1 (en) * 1983-06-15 1989-04-26 Mitsubishi Jukogyo Kabushiki Kaisha Apparatus for filling bags

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11591123B2 (en) 2018-02-19 2023-02-28 Windmöller & Hölscher Kg Filling device and method for filling bags with a respective unsealed upper end

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Publication number Publication date
EP0340315A1 (en) 1989-11-08
DE3882697D1 (en) 1993-09-02

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