EP2819924B1 - Device and method for reducing restoring forces of packaging sleeves in a filling machine - Google Patents

Description

• Einbringen von flach gefalteten Packungsmänteln in ein Magazin der Füllmaschine,
• Entnehmen jeweils eines flach gefalteten Packungsmantels aus dem Magazin und Auffalten des flachgefalteten Packungsmäntels zu einem im Querschnitt ein Parallelogramm bildenden aufgerichteten Packungsmantel mit einer Entnahme- und Auffaltvorrichtung und
• Übergeben des aufgerichteten Packungsmantels mit Hilfe einer Übergabevorrichtung an eine Transporteinrichtung zum Transportieren des aufgerichteten Packungsmantels entlang eines Transportweges, wobei mindestens ein Bearbeitungsschritt an dem aufgericheten Packungsmantel durchgeführt wird, während sich der aufgerichtete Packungsmantel auf dem Transportweg der Transporteinrichtung befindet.

The invention relates to a method for reducing restoring forces of packing coats in a filling machine, wherein each flat folded packing jacket has four mutually separated packing walls by parallel outer and inner folding edges and at the outer folding edges each having an acute inner angle between the packing walls, comprising the method steps .

• Inserting flat-folded sachets into a magazine of the filling machine,
• Each removing a flat-folded packing sheath from the magazine and unfolding the flat-folded packing sheath to a erected in a cross-section parallelogram packing jacket with a removal and Auffaltvorrichtung and
• Passing the erected packing jacket by means of a transfer device to a transport device for transporting the erected packing jacket along a transport path, wherein at least one processing step is performed on the erected packing jacket, while the erected packing jacket is on the transport path of the transport device.

Filling machines for filling products, in particular liquid foods, into packing containers made of cardboard composite material are known from the prior art. To build known filling machines, for example, on the EP 0 936 992 B1 and the DE 41 42 167 C2 pointed.

The usually parallelepiped packing containers are produced only in the filling machine due to the better transport ability from knitted edges and welded together to pack coats packing. Each flat folded packing jacket has four packing walls separated from each other by parallel outer and inner fold edges. At the outer fold edges of the flat-folded packing jacket, a sharp inner angle is enclosed in each case between the packing walls. The inner fold edges of the flat folded packing jacket are arranged between the outer fold edges. At the inner fold edges of the flat-folded packing jacket, an obtuse inner angle is enclosed in each case between the packing walls. If the packing walls have matching dimensions, the inner crease edges divide the distance between the outer crease edges on the middle.

The at least one conveyor line of the filling machine, the flat folded packaging coats are fed from a magazine. In the magazine, the packing shells are arranged as a stack, usually standing upright, one behind the other. At a removal side of the magazine pointing in the direction of the conveyor line, two of the four packing walls of the respective front packing jacket are exposed. The stack is acted upon at its back in the direction of the removal side with a force, for example, a spring or a linear drive, to move the packing coats of the stack to the removal side.

A picking and unfolding device comprises a gripper for detecting one of the two packing walls released on the unloading side of the magazine, one guide for the other of the two released packing walls and arranged behind the guide in the direction of movement Retaining elements for receiving the outer creasing edges of the unfolded packing jacket.

The removal and Auffältvörrichtung folds the initially flat folded packing jacket to a rectangular cross-section forming a packaging jacket. The unfolded packing jacket is taken over by a transport device. Along the conveyor line of the filling machine, the packing containers produced from the packing shells are sterilized, filled and subsequently closed. The preparation of the package bottom is usually carried out immediately before filling. Subsequently, the packing head is usually produced.

In particular, transport wheels or circulating conveyor belts with pocket-shaped receptacles for the unfolded packing shells or packing containers are used as transport means. The stepwise rotating transport wheels have a plurality of radially outwardly extending, parallel recordings. The recordings are usually designed as mandrels, on which the unfolded packing coats or packing containers are pushed; One then speaks of a mandrel wheel. In another embodiment of such a transport wheel, each receptacle comprises a plurality of arms or profiles that come to rest on the outside, in particular directly next to the bent edges of the unfolded packing jacket or of the packing container. In this case, the receptacles form cells into which the unfolded packing shells or packing containers can be inserted; one speaks then of a cellular wheel.

• Die flach gefalteten Packungsmäntel (1) sind aufrecht stehend in dem Magazin (2) der Füllmaschine bevorratet. Jeder flach gefaltete Packungsmantel (1) weist vier durch parallel verlaufende äußere Knickkanten (3a, 3b) und innere Knickkanten (4a, 4b) voneinander getrennte Packungswände (5a, 5b, 6a, 6b) auf.

Hereinafter, belonging to the prior art filling machine with removal and Auffaltvorrichtung the company SIG Combibloc GmbH in D-52441 Linnich on hand of FIG. 1 a) - d) explained in more detail:

• The flat-folded packing shells (1) are stored upright in the magazine (2) of the filling machine. Each flat folded packing jacket (1) has four packing walls (5a, 5b, 6a, 6b) which are separated from each other by parallel outer folding edges (3a, 3b) and inner folding edges (4a, 4b).

A removal side (7) of the magazine (2) releases the two forward-facing packing walls (5a, 5b) of the respective front packing jacket (1). So that the packing shells (1) do not fall out of the magazine on the removal side (7), retention elements (8a, 8b) are arranged on the removal side (7), which extend along the outer folding edges (3a, 3b) of the front packing sheath (1). extend. The respective front packing jacket (1) is not removed in the full width of the two packing walls (5a, 5b). Rather, the Packüngsmantel (1) only on one of the two shared packing walls (5a) of the packing jacket (1) on the removal side (7) of the magazine (2) is detected (see. FIG. 1 a) ). For detecting the packing wall (5a), a suction gripper (9) is used, which is fastened to a swivel arm (11) pivotably arranged about a vertical axis (10). By a about the axis (10) running pivoting movement of the suction pad (9), first the outer bending edge (3a) of the retaining element (8a) dissolves, which in the further pivotal movement of the suction pad (9) to the opposite outer bending edge (3b) , which is still held by the retaining element (8b), a flat parallelogram, as in particular FIG. 1a ) is recognizable forms. In the course of the further pivotal movement, first the outer bending edge (3b) is released from the retaining element (8b). Subsequently, the packing jacket (1) with the other of the two released packing walls (5b) is slidably guided along a curved guide surface (12) of a guide element (13). The guide surface (12) causes during the movement of the packing jacket (1) along the path of movement (14) an enlargement of the acute inner angles (15a, 15b), wherein the inner angle (15a) between the package walls (5b, 6b) and the inner angle (15b) between the package walls (5a, 6a) are included. In the direction of the movement path (14) is located at the end of the curved guide surface (12), a holding element (16), which is introduced in the form of a groove-shaped depression in the guide element (13). The holding element (16) serves to receive the outer bending edge (3b) of the unfolded packing jacket (1). Also in the direction of the movement path (14) behind the guide surface (12) is another, stationary holding element (17) in the form of a retaining strip (17) for receiving the diametrically opposite outer bending edge (3a). The distance and the orientation of the holding elements (16, 17) takes place in such a way that the packing jacket accommodated by the holding elements (16, 17) forms a rectangle in cross-section. This orientation is necessary for transferring the completely unfolded packing jacket to the transport device downstream of the removal and unfolding device, such as, in particular, the transport wheels mentioned in the introduction.

Because the packing shells (1) were stored or transported in the flat folded state for a long time prior to introduction into the magazine (2), the bent edges (3a, 3b, 4a, 4b) of the packing sheath (1) cause restoring forces corresponding to the unfolding of the package sheath (1) counteract. The restoring forces increase with the unfolding of the initially flat folded package jacket (1) into a packing jacket forming a cross-sectionally parallelogram, in particular a rectangle.

In order to reduce the restoring forces, the packing shells (1) with the help of the suction at the end of the curved guide surface (12) moves slightly beyond the rectangular cross-section, so that the initially acute inner angle (15a, 15b) of the packing jacket briefly is slightly more than 90 °, like this FIG. 1c) is recognizable.

It would like to overstretch the packing jacket (1) in the unfolded crease edges (3a, 3b), so that the packing jacket (1) after erecting as closely as possible the desired rectangular or square cross-section ( FIG. 1 d) ) and maintains.

However, the overstretching of the creases is only partially successful because you would have to overstretch the packaging coats times more or less depending on the carton texture. However, an individual overstretching is not possible due to the constant movement path (14) of the suction gripper (9). In addition, the additional movement of the suction gripper (9) for overstretching takes time, thereby lengthening the picking and unfolding cycles. This cycle extension reduces the working speed of the entire filling machine.

In order not to limit the speed of the filling machine too much despite overstretching, the packing shells are removed and unfolded with the highest possible speed. This results in snapping the kinked edges (3 a, 3 b) in the holding elements (16, 17) to a high noise.

The EP 0 978 453 A discloses a picking and unfolding device for removing a flat-folded package from a magazine and unfolding the removed package overwrap which transfers the partially cross-sectioned parallelogram package to a conveyor comprising two circulating belts for transporting the erect package over a transport path , The packing jacket is at the transfer to the Transporting device overstretched by means of a folding means short term, which is pivotally mounted on the removal and Auffaltvorrichtung. Overstretching reduces the restoring forces.

The EP 0 356 824 A1 discloses a method of unfolding a flat folded wrapper by means of a straightening device in which, via a lifting conveyor, the flat folded wrapper coats are inserted between discharge rollers and conveyed obliquely upwards. By means of a pushing device and supports the flat folded packing jacket is unfolded in the erecting device, wherein the inner angle between the packing walls at the outer bending edges are increased to almost 180 °. This leads to a reduction of the restoring forces. Thereafter, the pusher moves away from the side of the discharge rollers, the pusher occupying a central position, so that the packing jacket relaxes and maintains a square cross-section. Subsequently, a discharge conveyor pushes the erected to a square cross-section packing jacket on a mandrel wheel.

The EP 0339 116 A2 discloses a method for reducing restoring forces of package coats in a carton erector, wherein the flat folded package coats are individually withdrawn from the magazine by means of a circulating conveyor with suction cups and erected by means of guiding elements to form a cross-sectionally rectangular packing jacket. The conveyor directly transfers the erected packing jacket to means for reducing the return force, comprising two revolving upper conveyor belts and two circumferential lower conveyor belts with protrusions disposed thereon. The two upper conveyor belts form a tapered shaft on the inlet side, which causes the inner angle between the packing walls at the outer bending edges 180 °, while the packing jacket passes through the shaft. The thus flat folded packing jacket then passes into a station for re-erecting the flat-folded packing jacket. After the re-erecting of the flat-folded packing jacket, the latter reaches a discharge conveyor, which conveys the erected packing jacket to a filling machine.

The DE 933 918 B discloses a device for reducing the restoring force of an erected packing jacket in a filling machine, in which the flat-folded packing jackets are removed from a magazine by means of a removal blade from below and erected into a packing jacket forming a rectangle in cross-section. In order to reduce the restoring force, laying on the surface of the erected packing jacket, a relaxation ruler, which performs a swinging movement around the lower folding box edge. During the reduction of the restoring force, the withdrawal blade holds the erected packing jacket on a support until the packing jacket has been completely folded flat by the expansion guide. Subsequently, the packing jacket is transported by means of a conveyor.

The US 5 007 889 A discloses an apparatus for retrieving and unfolding a flat folded wrapper from a magazine, the unfolding of the wrapper being accomplished with a deployment arm. During the removal of the packing jacket with suction pads arranged on a pivoting arm, the restoring force of the packing jacket is simultaneously reduced by temporarily increasing the internal angle ⊖ by the unfolding arm to more than 90 °.

The DE 559 508 C discloses a feeding apparatus of packing jackets for filling a filling machine comprising a stack of flat-folded packing jackets Manufacture of the packaging container, a back and forth and up and down movable gripper for removing a flat folded packing jacket from the stack, for erecting the flat-folded package casing and for transferring the erected packing jacket to a conveyor designed as a conveyor. In order to make it possible to relax the longitudinal bending edges of the packing jacket, the erected packing jacket in the conveyor is folded over in a flat position reversed to the previous flat position in the stack and then erected again. This is done by a driver of the conveyor moves the erected packing jacket under guides and passes in the reverse flat position under a pressure roller. The subsequent Widerrichtrichten carried by a guide surface.

On the basis of this prior art, the object of the invention is to provide a method which allows a reduction of the restoring force adapted to the respective material of the package without increasing the cycle time for the removal and unfolding of the flat-folded package jacket and which permitting smooth transfer of the erected packing jacket to the transport device. Furthermore, a filling machine for carrying out the method is to be proposed.

• Übergabe des aufgerichteten Packungsmantels an eine Transporteinrichtung, die ein Transportrad mit mehreren sich radial nach außen erstreckenden Aufnahmen für jeweils einen Packungsmantel aufweist, wobei jede Aufnahme mehrere Profile aufweist, die an und/oder neben den Knickkanten des Packungsmantels zur Anlage bringbar sind, und wobei die Transporteinrichtung einen Antrieb zum Drehen des Transportrades um eine Drehachse aufweist,
• Reduzieren der Rückstellkraft durch zeitweiliges Vergrößern der Innenwinkels zwischen den Packungswänden an den äußeren Knickkanten auf mehr als 90° während sich der aufgerichtete Packungsmantels auf dem Transportweg der Transporteinrichtung befindet,
• wobei die Transporteinrichtung schrittweise betrieben wird und das Reduzieren der Rückstellkraft während eines Stillstandes des aufgerichteten Packungsmantels auf dem Transportweg oder während einer Bewegung des aufgerichteten Packungsmantels entlang des Transportwegs erfolgt.

The solution to this problem is based on the idea of decoupling the reduction of the restoring forces of the packing jacket from the removal and Auffaltvorgang. In detail, the object is achieved in a method of the type mentioned by the following features:

• Transferring the erected packing jacket to a transport device, which has a transport wheel with a plurality of radially outwardly extending receptacles for each a packing jacket, each receptacle having a plurality of profiles which can be brought to and / or adjacent to the bending edges of the packing jacket to the plant, and wherein the Transport device has a drive for rotating the transport wheel about an axis of rotation,
• Reducing the restoring force by temporarily increasing the internal angle between the packing walls at the outer crease edges to more than 90 ° while the erected packing jacket is on the transport path of the transport device,
• wherein the transport device is operated stepwise and reducing the restoring force during a standstill of the erected packing jacket on the transport path or during movement of the erected packing jacket along the transport path.

The reduction of the restoring force takes place with the aid of a device arranged on the transport device and independent of the removal and unfolding device for reducing the restoring force.

The invention uses free time window on the transport path, the removal device and Auffaltvorrichtung downstream transport device for the reduction of the restoring force. This makes it possible to carry out an adapted overstretching at shorter cycle times for the unfolding and removal process. The shortened cycle times allow a higher operating speed of the entire filling machine. The free time window in the stepwise driven, downstream transport facilities arise due to unused Standstorpositioneri and / or movement phases of the packing jacket along the transport path. The at least one processing step, in particular the formation of the package bottom, is carried out during a standstill interval at a processing station along the transport path. At standstill positions of Packunsmantels, for example, between a transfer position of the transport device and the processing station, the standstill interval has not been used. Also, the movement phase between the transfer position and the processing station has not been used to act on the packing jacket.

Due to the adapted overstretching and reducing the restoring force, the friction of the packing shells during insertion or removal is reduced by the inclusion of a transport wheel; In addition, it is prevented that the fully erected packing jacket is twisted in itself.

A filling machine for carrying out the method according to the invention is characterized by a device arranged on the transport device, independent of the picking and unfolding device for reducing the restoring force in the erected packing jacket by temporarily increasing the internal angle between the packing walls at the outer crease edges to more than 90 ° , The removal and Auffaltvorrichtung folds the initially flat folded packing jacket to a cross-sectional parallelogram forming upright packing jacket. The Packunsgmantel takes when unfolded to a erect packing jacket a maximum of a rectangular cross-section. The removal and Auffaltvorrichtung causes in particular no reduction of the restoring force by the Packing jacket folded over the rectangular cross-section, thereby increasing the internal angle between the packing walls at the outer crease edges to more than 90 °.

The downstream transport means is operated stepwise to allow the erected packing jacket to pass smoothly to the transport means and to perform the at least one processing step on the erected packing casing, in particular the formation of the bottom of the packing container.

The downtimes caused by the stepwise operation of the transport device are preferably not only used to carry out the at least one work step, but also to reduce the restoring force. Alternatively, however, the restoring force can also be reduced during a movement of the erected packing jacket along the transport path.

A preferred method for reducing the restoring force during standstill of the stepwise operated transport device is to move the outer bending edges towards each other in the direction of the cross-sectional diagonal between the outer bending edges of the erected packing jacket, so that the inner angle between the packing walls on the outer Bending edges increased to more than 90 °. About the movement length, the required overstretching can be adjusted to the height of the material-dependent restoring forces.

A method for reducing the restoring force, in particular during a movement of the erected packing jacket along the transport path of a step-by-step operated transport device, is characterized in that the internal angle between the packing walls to the outer crease edges is increased to more than 90 °, in which two opposing packing walls are pivoted parallel to each other about one of the two outer creases. Due to the size of the pivot angle of this parallel pivoting movement, the amount of reduction of the restoring force is adjusted.

For the usual composite materials used for producing the packing containers, it has been found that in order to reduce the restoring force, the internal angle between the packing walls at the outer folding edges is preferably increased to an angle in the range between 120 ° and 180 °. Such enlargement was in the interest of reasonable cycle times for the removal and Auffaltvorgang at modern filling machines no longer justifiable. According to the invention, it is even possible due to the time windows now available on the transport path of the downstream transport device to repeatedly increase the internal angle between the packing walls at the outer folding edges to more than 90 °, in particular at least 120 °.

Due to their compact design and suitability for a gradual operation, the removal and Auffaltvorrichtung downstream transport device is designed as a transport wheel, which has a plurality of radially outwardly extending receptacles for each pack jacket, each receptacle has a plurality of profiles on and / or in addition to the bending edges of the packing jacket can be brought to the plant and the transport device has a drive for rotating the transport wheel about an axis of rotation. Common transport wheels in filling machines have four shots arranged uniformly over the circumference of the axis of rotation. The drive of the transport wheel is designed as a stepper drive, with which the receptacles for the packing coats after turning the transport wheel by one step angle, in particular of 90 °, can be brought into a standstill position. After passing the erected packing jacket in a transfer position to the downstream transport wheel, the transport wheel continues to rotate by the step angle, so that a further recording of the transport wheel rotates in a position aligned with the holding elements of the removal and Auffaltvorrichtung. In this further recording, a further packing jacket is inserted immediately after the rotational movement. By rotating the transport wheel, the previously loaded with a packing jacket recording comes in a, in particular horizontal, standstill position.

Either the device for reducing the restoring force during the standstill of the transport wheel is activated or during the rotation of the transport wheel by the aforementioned step angle.

A device for reducing the restoring force during the stoppage of the transport wheel can be particularly favorably integrated into the filling machine, if each receptacle has at least a first profile, which can be brought to bear on or next to one of the two outer creases of the packing jacket and the recording at least two second Has profiles that can be brought to bear next to the other of the two outer creases of the packing jacket.

The restoring force of the erected in cross-section rectangle packing jacket causes the packing jacket is securely held in the at least three profiles having recording. If the receptacle has only a first profile, this is preferably designed as an angle profile, which can be brought to bear against the bending edge. The two second profiles, which can be brought to bear against the opposite outer bending edge, are preferably designed as rods.

In a transport wheel configured with such first and second profiles, a thrust element which can be temporarily brought into contact with at least one of the two outer crease edges is preferably provided as a device for reducing the restoring force during standstill of the transport wheel, which is set up in the direction of one between the two outer creases of the erected packing jacket extending cross-sectional diagonal is movable. The distance of the second profiles from the outer buckling edge is preferably determined so that the pushing element is movable through the rods in the direction of the outer buckling edge. During the stoppage of the transport wheel, the stationary mounted pushing element compresses the packing casing along the cross-sectional diagonal, whereby the inner angle between the packing walls at the outer folding edges is increased to more than 90 °. The travel of the thrust element in the direction of the cross-sectional diagonal is determined until the restoring force is broken. In this case, the packing jacket is supported on the first profile of the receptacle. After retraction of the pusher element, the packing jacket again straightens until it again comes to rest on the two second profiles.

In one embodiment of the invention, it is also conceivable that the receptacle has a first and a second, each configured as an angle profile profile, which can be brought to the outer fold edges to the plant. One of the two angle sections has a section designed as a pushing element which is temporarily movable in the direction of the cross-sectional diagonal running between the outer bending edges of the erected packing jacket.

An almost complete integration of the device for reducing the restoring force in the transport wheel is achieved in that each receptacle has two first mounts, the two first mounts receiving one of the two outer creases and one of the two inner creases of the package mantle, each receptacle receiving two second mounts in which the two second holders receive the other of the two outer crease edges and the other of the two inner crease edges of the packing jacket, that the two first holders are fixedly arranged on the transport wheel and the second holders are arranged so pivotably on the transport wheel, so that the pivoting movement of the two second holders two opposing packing walls are parallel to each other about one of the two outer fold edges pivotally. By pivoting the two second brackets during standstill or rotation of the transport wheel, the internal angle between the packing walls is temporarily increased at the outer crease edges to more than 90 °, thereby breaking the restoring force.

Another advantage of a filling machine with pivotally mounted brackets is that the transfer of the erected packing jacket to the downstream transport device can already take place when the flat folded packing jacket is erected in cross section to form a parallelogram whose cross section only about 1/3 of the rectangular cross section of the fully erected packing jacket. The thus only partially erected packing jacket is pushed into the receptacle of the transport wheel, which is due to the pivotally mounted second brackets able to safely receive the partially erected packing jacket. As a result, the complete erection of the flat folded package jacket can be partially displaced into the downstream transport device.

The two second holders of each receptacle are preferably mechanically connected to one another and form the coupling of a coupling gear which is arranged on the transport wheel. In the same way, the two first brackets can be connected to a single profile. The pivotal movement of the two second brackets initially causes the complete erection of the packing jacket until it has a rectangular or square cross-section. In the course of the further pivoting movement, the restoring force is reduced. The filling machine has a device for pivoting the two second holders and thus also for reducing the restoring force.

The apparatus comprises a cylinder cam gear having a cylindrical fixed cam body disposed coaxially with the axis of rotation of the sprocket, a cylindrical cam disposed in the cam body, a scanning element guided in the cylinder cam, and a linkage on one side with the sensing element and on the other side is connected to the second brackets. The cylinder curve in the cam body is designed such that first the second pair of holders erects the packing jacket into a rectangle or square. The further course of the cylinder curve causes a continuation of the pivoting movement, whereby the inner angle between the packing walls at the outer crease edges is increased to more than 90 °. Such a configuration of the cylinder curve causes the device to reduce the restoring force during the rotation of the transport wheel is active.

If the device described above for reducing the restoring force during standstill of the stepwise operable transport wheel should be activated, at least a portion of the cylinder curve in an in Direction of the axis of rotation of the transport wheel slidable segment of the cam arranged. The sensing element reaches this portion of the cylinder cam at the time the package jacket is erected into a square. Then, the portion of the cylinder curve, for example, with a mechanically operated plunger, moved from a starting position in the direction of the axis of rotation of the transport wheel, whereby the pivotal movement of the second brackets is continued despite stoppage of the transport wheel. After pivoting of the second holder for the purpose of reducing the restoring force, the slidably guided segment of the cam is retracted to its initial position, so that the portion of the cylinder cam in the slidable segment is aligned with the rest of the cylindrical cam arranged in the stationary cam. In the course of the cylinder curve is annular, so that the second brackets are no longer moved over the linkage during the following rotation of the transport wheel by a step angle until they are pivoted during rotation by the last step angle before reaching the transfer position of the transport wheel so that the only partially erected packing jacket can be inserted into the receptacle.

Figur 2

eine schematische perspektivische Teilansicht einer Füllmaschine vor der Aktivierung einer Vorrichtung zum Reduzieren der Rückstellkraft,

Figur 3

eine Teilansicht der Füllmaschine nach Figur 2, während der Aktivierung der Vorrichtung zum Reduzieren der Rückstellkraft,

Figuren 4 a - d

eine schematische Ansicht zur Veranschaulichung des Entnehmens und Auffaltens von Packungsmänteln aus einem Magazin einer Füllmaschine nach den Figuren 2 und 3,

Figuren 5 a - b

eine schematische Darstellung zur Veranschaulichung des Reduzierens der Rückstellkraft in einer Füllmaschine nach den Figuren 2 und 3,

Figur 6

eine schematische perspektivische Teilansicht eines zweiten Ausführungsbeispiels einer Füllmaschine während des Reduzierens der Rückstellkraft an einem Packungsmantel und gleichzeitiger Übergabe eines weiteren Packungsmantels an eine Transporteinrichtung,

Figur 7

eine Teilansicht der Füllmaschine nach Figur 6, während der Drehung des Transportrades,

Figuren 8 a - d

eine schematische Darstellung zur Veranschaulichung des Reduzierens der Rückstellkraft in einer Füllmaschine nach den Figuren 6 und 7,

Figuren 9 a - f

schematische perspektivische Teilansichten eines dritten Ausführungsbeispiels einer Füllmaschine, bei der das Reduzieren der Rückstellkraft während einer Drehung des Transportrades erfolgt und

Figur 10 a - c

eine schematische Darstellung zur Veranschaulichung des Reduzierens der Rückstellkraft in einer Füllmaschine nach den Figuren 9 a - f.

The invention will be explained in more detail with reference to the figures. Show it:

FIG. 2

a schematic perspective partial view of a filling machine before the activation of a device for reducing the restoring force,

FIG. 3

a partial view of the filling machine after FIG. 2 while activating the Device for reducing the restoring force,

FIGS. 4 a - d

a schematic view for illustrating the removal and unfolding of pack coats from a magazine of a filling machine after the FIGS. 2 and 3 .

FIGS. 5 a - b

a schematic representation for illustrating the reduction of the restoring force in a filling machine according to the FIGS. 2 and 3 .

FIG. 6

a schematic perspective partial view of a second embodiment of a filling machine while reducing the restoring force on a packing jacket and simultaneously transferring a further packing jacket to a transport device,

FIG. 7

a partial view of the filling machine after FIG. 6 during the rotation of the transport wheel,

FIGS. 8 a - d

a schematic representation for illustrating the reduction of the restoring force in a filling machine according to the FIGS. 6 and 7 .

FIGS. 9a-f

schematic partial perspective views of a third embodiment of a filling machine, in which reducing the restoring force takes place during a rotation of the transport wheel and

FIG. 10 a - c

a schematic representation for illustrating the reduction of the restoring force in a filling machine according to the Figures 9 a - f.

As far as the in the Figures 2 - 10 partially filled filling machines according to the invention for filling liquid food in packing containers comprise matching components, such as partially in FIG. 1 Filling machine according to the prior art shown, matching reference numerals are used. In addition, the explanatory notes to the in FIG. 1 shown filling machine reference.

On a frame (20) of the filling machine after FIGS. 2 to 5 At the beginning of the conveyor line, the magazine (2) for receiving the flat-folded packing shells (1) for producing the packing containers is arranged. The magazine (2) comprises holding profiles (21 a, b), which come to the outer fold edges (3 a, b) of the packaging shells (1) to the plant. The removal side (7) of the magazine (2) releases the two front packing walls (5 a, b) of the total of four packing walls (5 a, b, 6 a, b) of the respective front packing jacket (1). The on the conveyor line of the filling machine the magazine (2) downstream removal and Auffaltvorrichtung comprises a suction pad (9) with three pneumatic suckers for detecting the release on the side (7) released packing wall (5 a). The suction gripper (9) is arranged along a straight-line movement path (23) perpendicular to the released packing wall (5 a) slidably.

The removal and Auffaltvorrichtung also has a flat guide surface (24) for the outer bending edge (3 b) the other of the two released packing walls (5 b) of the packing jacket (1). The planar guide surface (24) guides the outer bending edge (3 b) in a sliding manner.

In the direction of the movement path (23) behind the planar guide surface (24) is a stationary holding element (17) for receiving the outer bending edge (3 a). The holding element (25) for receiving the diametrically opposite outer bending edge (3 b) is between a in the FIGS. 4 a - c shown starting position and an in FIG. 4d shown end position by means of a linear drive back and forth. Both the stationary holding element (17) and the movable holding element (25) are designed as an angle profile. The two angularly arranged surfaces of the angle profiles enter the in FIG. 4d shown end position on the package walls (5 a, 6 a and 5 b, 6 b) to the plant.

As in particular from the FIGS. 4 As can be seen, the distance between the flat guide surface (24) and the movement path (23) of the suction gripper (9) from the removal side (7) of the magazine (2) in the direction of the holding elements (17, 25) decreases continuously.

In order to transfer the packing jacket (1) completely erected by the holding elements (17, 25) into a packing jacket (1) forming a square in cross-section to a transport device (26) of the filling machine arranged downstream of the removal and unfolding device, the suction gripper (9) is provided with an actuator (22) vertically movable up and down.

The transport device (26) comprises a about a rotational axis (28 a) rotatable transport wheel (29) with four radially outwardly extending receptacles, each having a first profile (30) and two second profiles (31). The first profile (30) is designed as an angle guide and can be brought to the outer bending edge (3 b) to the plant. The two second profiles (31) are designed as rod profiles and can be brought directly to the plant next to the outer bending edge (3 a). The first and second profiles (30, 31) form cells into which the unfolded packing shells with a rectangular cross-section can be inserted. The axis of rotation (28 a) of the transport wheel (29) lies in a vertical plane transverse to the conveying line (23) of the filling machine. The transport wheel (29) is rotated by a drive, not shown, step by step by 90 ° about the axis of rotation (28a). Of the illustrated transport wheel (29), the unfolded packing shells (1) are transferred to further, not shown in the figures, transport facilities to perform on the packing coats further processing steps.

At the transport device, a device (32) for reducing the restoring force is arranged. The device (32) for reducing the restoring force comprises a thrust element (33), which is connected via an arm (34) with a movement drive (35). The designed as an angle profile thrust element (33) extends parallel to the outer bending edge (3 a), at which it is temporarily brought into abutment, the buckling edge (3 a) formed on the between the legs of the angle profile on the inside edge (36) is applied. The moving drive (35) is fixed to the frame (20) of the filling machine.

• Nach dem Entnehmen und Auffalten des Packungsmantels (1) wird dieser in die senkrecht nach unten weisende Aufnahme des Transportrades (29) eingeschoben. Anschließend wird das Transportrad (29) im Gegenuhrzeigersinn (37) um einen Schrittwinkel von 90° mit Hilfe des nicht dargestellten Antriebs gedreht, so dass die zuvor beladene Aufnahme in eine horizontale, nach rechts weisende Stillstandsposition gelangt. In dieser Stillstandsposition des Transportrades (29) wird der Bewegungsantrieb (35) der Vorrichtung zum Reduzieren der Rückstellkraft aktiviert, so dass das Schubelement (33) an der äußeren Knickkante (3 a) zur Anlage gelangt. Im Zuge der weiteren Bewegung des Schubelementes (33) lösen sich die Packungswände (5 a, 6 a) von den stabförmigen zweiten Profilen (31), während sich die äußeren Knickkanten (3 a, b) in Richtung der Querschnittsdiagonalen (38) aufeinander zu bewegen. Dabei wird der Innenwinkel (39) zwischen den Packungswäriden (5 a, 6 a bzw. 5 b, 6 b) an den äußeren Knickkanten (3 a, b) auf mehr als 90° vergrößert, wie dies deutlich aus Figur 5b erkennbar ist. Diese Vergrößerung des Innenwinkels (39) bricht die Vorspannkraft in den Knickkanten (3 a, b) sowie den inneren Knickkanten (4 a, b). Anschließend wird das Schubelement (33) mit Hilfe des Bewegungsantriebs (35) in die Ausgangslage zurückgezogen, so dass der Packungsmantel (1) wieder einen rechteckigen Querschnitt, jedoch mit reduzierter Rückstellkraft einnimmt. Schließlich wird das Transportrad (29) um einen Schrittwinkel von 90° weitergedreht, wodurch der nächste, von der senkrecht nach unten weisenden Aufnahme zuvor aufgenommene Packungsmantel (1) in die horizontal nach rechts weisende Stillstandsposition gelangt und eine Reduzierung der Rückstellkraft erfolgt.

The filling machine after the FIGS. 2, 3 works as follows:

• After removal and unfolding of the packing jacket (1) this is inserted into the vertically downwardly receiving the transport wheel (29). Subsequently, the transport wheel (29) is rotated in the counterclockwise direction (37) by a step angle of 90 ° by means of the drive, not shown, so that the previously loaded recording in a horizontal, to the right-facing standstill position arrives. In this standstill position of the transport wheel (29) of the movement drive (35) of the device for reducing the restoring force is activated, so that the thrust element (33) at the outer bending edge (3 a) comes to rest. In the course of the further movement of the thrust element (33), the packing walls (5 a, 6 a) of the rod-shaped second profiles (31), while the outer fold edges (3 a, b) toward each other in the direction of the cross-sectional diagonal (38) move. In this case, the inner angle (39) between the package heat (5 a, 6 a and 5 b, 6 b) at the outer bending edges (3 a, b) increased to more than 90 °, as is clear FIG. 5b is recognizable. This enlargement of the inner angle (39) breaks the biasing force in the bending edges (3 a, b) and the inner fold edges (4 a, b). Subsequently, the thrust element (33) with the aid of the movement drive (35) is pulled back into the starting position, so that the packing jacket (1) again assumes a rectangular cross section, but with reduced restoring force. Finally, the transport wheel (29) is further rotated by a step angle of 90 °, whereby the next, from the vertically downwardly facing recording previously recorded packing jacket (1) enters the horizontally to the right-facing standstill position and a reduction of the restoring force.

The in the FIGS. 6 and 7 partially shown filling machine differs from that in the FIGS. 2 and 3 shown filling machine in that a not yet completely raised to a rectangle or square packing jacket (1) is passed to the vertically downwardly receiving the transport wheel (29). Furthermore, the device (32) for reducing the restoring force is constructed differently. As far as the in the FIGS. 6 and 7 shown filling machine has matching components such as partially in FIGS. 2 and 3 illustrated Filling machine, matching reference numerals are used. In addition, reference is made to the explanations there for the avoidance of repetitions.

The transport wheel (29) likewise has four receptacles, each receptacle having a first, radially outwardly extending profile (40) which is arranged stationarily on the transport wheel (29). The first profile (40) is angled at the side edges. The angled profile areas form first holders (41) for receiving the outer buckling edge (3 a) and the inner bending edge (4 a) of the packing jacket (1). A second profile (42) also extends radially outward and is also angled in the edge regions. The angled regions form second holders (43) for receiving the other outer bending edge (3 b) and the other inner bending edge (4 b) of the packing jacket (1). The second profile (42) is designed as a coupling of a linkage with four joints, which converts a straight-line movement of a linkage (44) in a swinging movement of the second profile (42). The coupling mechanism has two rockers (45), which are articulated at one end to in extension of the second profile (42) arranged arms (46) and articulated at the other end to the axle body (28 b) of the transport wheel (29) , The rockers (45) move parallel to the side walls (6 a, 5 b) of the packing jacket (1).

The linkage (44) is made in two parts. The linkage is divided into an angled portion (44 a) and a straight-line portion (44 b). The angled part (44 a) is hinged to the underside of the second profile (42). At the opposite end of the angled portion (44 a) is pivotally connected to the straight part (44 b). The rectilinear portion (44 b) is connected at the gelenkfernen end with a sensing element (47) in the form of a cam roller. The rectilinear section (44 b) is rotatably connected to the Achskörper (28 b) connected guide element (48) forcibly guided in the direction of the axis of rotation (28 a) of the transport wheel (29). The sensing element (47) is part of a cylinder cam gear (49). The cylinder cam gear (49) has coaxially with the axis of rotation (28 a) of the transport wheel (29) a fixedly arranged on the frame (20) cam body (50). In the cam body (50), a cylinder cam (51) in the form of a groove is inserted, which guides the sensing element (47). A portion (52) of the cylinder cam (51) is part of a in the direction of the axis of rotation (28 a) displaceable segment (53) of the cam body (50). The segment (53) is in a gate (54) of the cam (50) by means of an actuating member (55) reciprocable. The movement takes place with the aid of a drive not shown for clarity.

Hereinafter, the method for reducing restoring forces in packing jackets (1) in a filling machine according to the FIGS. 6 and 7 based on FIGS. 8 a - d explained in more detail.

FIG. 8 a shows a plan view of the vertically downwardly facing receiving the transport wheel (29). In this position of the receptacle, the packing jacket (1), which is erected only partially to form a parallelogram, is inserted into the receptacle. In the present embodiment, the packing jacket (1) is erected into a rhombus, which has about 1/3 of the square cross section of the fully erected packing jacket (1). Subsequently, the Tränsportrad (29) is further rotated clockwise (56) by a step angle of 90 °, so that the recording shows horizontally to the left (see. FIG. 6 ). During this rotation through 90 °, the sensing element (47) in the cylinder cam (51) is guided inwardly in the direction of the transport wheel (29), whereby the linkage (44), the second profile (42) in the in FIG. 8b illustrated standstill position pivoted. In the in FIG. 8b shown standstill position of the recording in which it points horizontally to the left, the packing jacket (1) is erected in cross section to a square. In order now to reduce the restoring forces in the packing jacket (1) caused by the bending edges (3a, b, 4a, b), the internal angle (39) between the packing walls (5a, 6a and 5b, 6b) the outer fold edges (3 a and 3 b) increased to more than 90 °. In the in FIGS. 8b, c In the horizontal, left-facing position of the receptacle, the sensing element (47) is located in the portion (52) of the slidably disposed segment (53) of the cam body (50). With the aid of the actuating member (55), the segment (53) is now in the direction of the axis of rotation (28 a) inwardly in the direction of the transport wheel (29) displaced, whereby the second profile (42) in the FIG. 8 a) opposite position after FIG. 8 c) swings. As a result, the inner angle (39) is increased to a value of more than 90 °, in the illustrated embodiment of about 130 °. Subsequently, during the standstill in the vertically left-facing position of the receptacle, the actuator (55) is retracted until the portion (52) is again flush with the rest of the cylinder cam (51) as shown in FIG FIG. 8 d) is recognizable.

Now take place two more rotations of the transport wheel (29) by a step angle of 90 °, wherein the fully erected and overstretched in the fold edges packing jacket (1) maintains its square cross-section. This is achieved by guiding the scanning element (47) through step angles of 90.degree. In each case during the following two rotations in an annular section (57) of the cylinder cam (51). As soon as the receptacle points horizontally to the right, the erected packing jacket with reduced restoring force is connected to a subsequent, not shown for clarity Handing over the transport device. During the subsequent rotation of the recording from this transfer position by 90 ° in the vertically downward takeover position ( Figure 8 a ), the sensing element (47) in the outwardly guided portion (58) of the cylinder cam (51) is guided, whereby the pivotable second profile (42) back into the in FIG. 8 a position shown to take over a further partially erected packing jacket (1) passes.

In the Figures 9 a - f partially shown filling machine according to the invention largely corresponds to the filling machine according to the FIGS. 6 and 7 , As far as the filling machine has matching components, matching reference numerals are used. In addition, the explanations to the filling machine after the FIGS. 6, 7 Referenced.

The main difference between the filling machine after the FIGS. 9 a) - f) as well as the filling machine after the FIGS. 6 and 7 is that reducing the restoring force exclusively during movement of the erected packing jacket (1) along the transport path of the transport wheel (29), but not during standstill of the transport wheel, as in the embodiments of the filling after the Figures 2 or 6 and 7. The recordings of the transport wheel are consistent as in the embodiment according to FIGS. 6 and 7 designed, so that in this respect reference is made to the statements there. The device (32) for reducing the restoring force differs from that for the filling machine after the FIGS. 6 and 7 in that no portion (52) of the cylinder cam (51) is arranged in a displaceable segment (53) of the cam body (50). A displaceable segment (53) is dispensable, since the movement of the second profile (42) solely by the movement of the sensing element (47) in the continuous cylinder curve (51) during the rotation of the transport wheel (29) is caused.

• Figuren 9 a), 10 a) zeigen das Transportrad (29) mit senkrecht nach unten zeigender Aufnahme, in der die Übernahme des im Querschnitt zu einem nicht quadratischen Parallelogramm aufgerichteten Packungsmantels (1) erfolgt. Das Abtastelement (47) befindet sich in der Zylinderkurve (51) in maximal möglichem Abstand zu dem Transportrad (29). Während der anschließenden Verdrehung des Transportrades im Uhrzeigersinn (56) um einen Schrittwinkel von 90° wird das Abtastelement (47) auf einem nach innen geführten Abschnitt (59) der Zylinderkurve (51) in Richtung des Transportrades (29) geführt, wodurch das Gestänge (44) das zweite Profil (42) in die in Figuren 9 c), 10 b) dargestellte Position verschwenkt. In dieser Position sind die beiden Innenwinkel (39) zwischen den Packungswänden an den äußeren Knickkanten (3 a, b) auf einen Winkel von mehr als 90°, im dargestellten Ausführungsbeispiel von etwa 140°, vergrößert und dadurch die von den Knickkanten (3 a, b, 4 a, b) ausgehenden Rückstellkräfte reduziert.

The complete erection of the packing jacket and the subsequent overstretching of the packing edges (3 a, b, 4 a, b) are explained in more detail below:

• FIGS. 9 a) . 10 a) show the transport wheel (29) with vertically downwardly facing recording in which the acquisition of the erected in cross section to a non-squared parallelogram packing jacket (1). The scanning element (47) is located in the cylinder cam (51) at a maximum possible distance from the transport wheel (29). During the subsequent rotation of the transport wheel clockwise (56) by a step angle of 90 °, the sensing element (47) is guided on an inwardly guided portion (59) of the cylinder cam (51) in the direction of the transport wheel (29), whereby the linkage ( 44) the second profile (42) in the in FIGS. 9c) . 10 b) shown pivoted position. In this position, the two inner angles (39) between the packing walls at the outer bending edges (3 a, b) to an angle of more than 90 °, in the illustrated embodiment of about 140 °, increased and thereby the of the bending edges (3 a , b, 4 a, b) reduced outgoing restoring forces.

Then, the transport wheel (29) is further rotated by a further step angle of 90 °, wherein the sensing element (47) passes through an outwardly guided portion (58) of the cylinder cam (51). In this case, the second profile (42) by means of the linkage (44) in the in FIGS. 10c) . E) pivoted position shown, in which the packing jacket (1) has the desired square cross-section with reduced restoring forces. The picture points vertically upwards. In this position, a processing step can be carried out on the fully erected packing jacket be performed, such as the formation of the package bottom.

In the further rotated by a step angle of 90 ° clockwise (56) position in which the recording shows horizontally to the right, the processed packing jacket (1) can be transferred to a downstream transport device. The rotation between the position with vertically upwardly facing recording in the position with horizontally facing to the right recording takes place without further pivoting of the second profile. For this purpose, the sensing element (47) in an annular, from FIG. 10c) apparent section (57) of the cylinder cam (51) out.

The device described above FIG. 9 is used in particular when the cardboard boxes processed in the filling machine have a largely constant quality and the magnitude of the oscillation amplitude of the second profile (42) does not have to be changed in order to reduce the restoring force. The device after FIGS. 6, 7 However, it is used in particular in such filling machines in which packaging coats (1) are processed with different board quality. By adjusting the stroke of the slidably guided segment (53), the amplitude of the oscillatory movement of the second profile (42) can be adapted to the nature of the carton. <B> LIST OF REFERENCES </ b> No. description No. description 1 pack casing 31 Second profile (bar profiles) 2 magazine 32 Device for reducing the restoring force 3 a, b outer creases 33 push element 4 a, b inner fold edges 34 poor 5 a, b package panels 35 motion drive 6 a, b package panels 36 Edge (angle profile) 7 removal side 37 counterclockwise 8th Retaining elements 38 Sectional diagonal 9 Suction pads 39 interior angle 10 axis 40 first profile 11 swivel arm 41 first bracket 12 guide surface 42 second profile 13 guide elements 43 second bracket 14 motion path 44 linkage 15 a, b interior angle 45 Swing 16 retaining elements 46 booms 17 retaining elements 47 Sensing element (cam roller) 18 - 48 guide element 19 - 49 Cylinder cam mechanism 20 frame 50 cam 21 a, b retaining profiles 51 cylinder cam 22 actuator 52 section 23 motion path 53 segment 24 guide surface 54 scenery 25 retaining element 55 actuator 26 Transport facility 56 clockwise 27 coat slide 57 annular section 28 a axis of rotation 58 outgoing Sect. 28 b axle body 59 inwardly guided Sect. 29 Transport wheel 30 first profile (angle profile)

Claims (12)

1. A method for reducing restoring forces of package sleeves (1) in a filling machine, wherein each flat-folded package sleeve (1) comprises four package walls (5a, b, 6a, b) separated from one another by parallel-running outer (3a, b) and inner (4a, b) fold edges and at the outer fold edges (3a, b) respectively one acute internal angle (39) is enclosed between the package walls (5a, b, 6a, b), comprising the process steps

   - inserting flat-folded package sleeves (1) into a magazine (2) of the filling machine,

   - removing respectively one flat-folded package sleeve (1) from the magazine (2) and unfolding the flat-folded package sleeve (1) to form an upright package sleeve (1) forming a parallelogram in cross-section by means of a removal and unfolding apparatus and

   - transferring the upright package sleeve (1) by means of a transfer apparatus to a transport device (26) downstream of the removal and unfolding apparatus for transporting the upright package sleeve (1) along a transport path, wherein at least one processing step is carried out on the upright package sleeve whilst the upright package sleeve (1) is located on the transport path of the transport device (26)

   characterised by

   - the transfer of the upright package sleeve (1) to a transport device (26), which comprises a transport wheel (29) having a plurality of radially outwardly extended receptacles for respectively one package sleeve (1), wherein each receptacle has a plurality of profiles (30, 31, 40, 42) which can be brought to rest against and/or adjacent to the fold edges (3a, b) of the package sleeve (1) and wherein the transport device (26) has a drive for turning the transport wheel (29) about an axis of rotation,

   - reducing the restoring force by temporarily increasing the internal angle (39) between the package walls (5a, b, 6a, b) at the outer fold edges (3a, b) to more than 90° whilst the upright package sleeve (1) is located on the transport path of the transport device (26),

   - wherein the transport device (26) is operated in a stepwise manner and that the reduction in the restoring force is accomplished during a standstill of the upright package sleeve (1) on the transport path or during a movement of the upright package sleeve (1) along the transport path.
2. The method according to claim 1, characterised in that the internal angle (39) between the package walls (5a, b, 6a, b) at the outer fold edges is increased to more than 90° by moving the outer fold edges (3a, b) towards one another in the direction of a cross-sectional diagonal between the outer fold edges (3a, b) of the upright package sleeve (1).
3. The method according to claim 1 or 2, characterised in that the internal angle (39) between the package walls (5a, b, 6a, b) at the outer fold edges is increased to more than 90° by pivoting two opposite package walls (6a, 5b) parallel to one another in each case about one of the two outer fold edges (3a, b).
4. The method according to any one of claims 1 to 3, characterised in that the internal angle (39) between the package walls (5a, b, 6a, b) at the outer fold edges is increased to an angle in the range between 120° to 180°.
5. A filling machine for filling products into packaging containers comprising

   - a magazine (2) for receiving flat-folded package sleeves (1) for producing the package containers, wherein each flat-folded package sleeve (1) comprises four package walls (5a, b, 6a, b) separated from one another by parallel-running outer (3a, b) and inner (4a, b) fold edges and at the outer fold edges (3a, 3b) respectively one acute internal angle (39) is enclosed between the package walls (5a, b, 6a, b),

   - a removing and unfolding apparatus for removing respectively one flat-folded package sleeve (1) from the magazine (2) and for unfolding the flat-folded package sleeve (1) to form an upright package sleeve (1) forming a parallelogram in cross-section,

   - a transfer apparatus for transferring the upright package sleeve to a downstream transport device (26) for transporting the upright package sleeve (1) along a transport path characterised by

   - an apparatus for reducing the restoring force (32) of the upright package sleeve (1) located on the transport device (26) by temporarily increasing the internal angle (39) between the package walls (5a, b, 6a, b) at the outer fold edges (3a, b) to more than 90°

   - wherein the transport device (26) comprises a transport wheel (29) having a plurality of radially outwardly extended receptacles for respectively one package sleeve (1),

   - each receptacle has a plurality of profiles (30, 31, 40, 42) which can be brought to rest against and/or adjacent to the fold edges (3a, b) of the package sleeve (1) and

   - wherein the transport device (26) has a drive for turning the transport wheel (29) about an axis of rotation.
6. The filling machine according to claim 5, characterised in that the drive is configured as a stepping drive by which means the receptacles for the package sleeves (1) can be brought into a standstill position after turning the transport wheel (29) by a step angle and the apparatus for reducing the restoring force (32) can be activated whilst the transport wheel is at a standstill.
7. The filling machine according to claim 5, characterised in that the drive is configured as a stepping drive by which means the receptacles for the package sleeves (1) can be brought into a standstill position after turning the transport wheel (29) by a step angle and the apparatus for reducing the restoring force (32) can be activated during the turning of the transport wheel (29).
8. The filling machine according to claim 6, characterised in that

   - the receptacle has at least one first profile (30) that can be brought to rest against one of the two outer fold edges (3b) of the package sleeve (1) and

   - the receptacle has at least two second profiles (31) which can be brought to rest against the other of the two outer folds edges (3a) of the package sleeve (1).
9. The filling machine according to claim 6 or 7, characterised in that

   - the receptacle has two first holders (41) which receive one of the two outer fold edges (3a) and one of the two inner fold edges (4a) of the package sleeve (1),

   - the receptacle has two second holders (43) which receive the other of the two outer fold edges (3b) and the other of the two inner fold edges (4b) of the package sleeve (1),

   - that two first holders (41) are disposed in a fixed position on the transport wheel (29) and

   - the second holders (43) are disposed pivotably on the transport wheel (29) so that due to the pivoting movement of the two holders (29) two opposite package walls (6a, 5b) are pivotable parallel to one another about one of the two outer fold edges (3a, b).
10. The filling machine according to claim 6 or 8, characterised in that the apparatus for reducing the restoring force (32) comprises a push element (33) which acts temporarily on at least one of the two outer fold edges (3a, b), which can be moved in the direction of the cross-sectional diagonal running between the outer fold edges (3a, b) of the upright package sleeve (1).
11. The filling machine according to claim 9, characterised in that the apparatus for reducing the restoring force (32) comprises

    - a cylinder cam mechanism (49) comprising a cylindrical fixed cam body (50) which is disposed coaxially to the axis of rotation (28a) of the transport wheel (29),

    - a cylinder cam (51) disposed in the cam body (50),

    - a scanning element (47) guided in the cylinder cam (51) and

    - a linkage (44) which is connected on one side to the scanning element (47) and on the other side to the second pivotable holders (43).
12. The apparatus according to claim 6 and 11, characterised in that at least one section (52) of the cylinder cam (51) is disposed in a segment (53) of the cam body (50) displaceable in the direction of the axis of rotation (28a).

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