EP3587283B1 - Packaging machine for packaging with stretch film and optimized packaging method - Google Patents

Packaging machine for packaging with stretch film and optimized packaging method Download PDF

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Publication number
EP3587283B1
EP3587283B1 EP18179617.8A EP18179617A EP3587283B1 EP 3587283 B1 EP3587283 B1 EP 3587283B1 EP 18179617 A EP18179617 A EP 18179617A EP 3587283 B1 EP3587283 B1 EP 3587283B1
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EP
European Patent Office
Prior art keywords
film
transport
recess
guide
belt
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.)
Active
Application number
EP18179617.8A
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German (de)
French (fr)
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EP3587283A1 (en
Inventor
Sascha Kirsch
Eugen Elis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bizerba SE and Co KG
Original Assignee
Bizerba SE and Co KG
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Bizerba SE and Co KG filed Critical Bizerba SE and Co KG
Priority to EP18179617.8A priority Critical patent/EP3587283B1/en
Priority to US16/396,804 priority patent/US10781006B2/en
Publication of EP3587283A1 publication Critical patent/EP3587283A1/en
Application granted granted Critical
Publication of EP3587283B1 publication Critical patent/EP3587283B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/54—Wrapping by causing the wrapper to embrace one end and all sides of the contents, and closing the wrapper onto the opposite end by forming regular or irregular pleats
    • 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
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • 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
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/003—Arrangements to enable adjustments related to the packaging material
    • 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
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/005—Adjustable conveying means

Definitions

  • the invention relates to a packaging machine and a method for packaging packaging goods by means of a stretchable film, with a film transport device for film feeding to a packaging material to be packaged, which has a first and a second belt conveyor for transporting the film, which each comprise a first and a second transport belt , which are driven synchronously in a film transport direction predetermined by the film transport device and are arranged next to one another, at least the second belt conveyor being movable in a direction perpendicular to the film transport direction, and with a movable film guide element with which the film can be inserted into the film transport device, the film guide element being one Guide plate for guiding the film, which has a first and a second recess in a vertical edge facing the belt conveying devices, w
  • the first belt conveyor can be inserted into the first recess and the second belt conveyor can be inserted into the second recess, whereby a first zero position with respect to the width of the film is established.
  • a packaging machine of this type is known for packaging packaging goods by means of films, which are designed to transfer the stretch film from the supply roll to the packaging device.
  • the films are conveyed from a film dispenser through a movable film guide element to a film transport device.
  • the film transport device has two synchronously operated belt conveyors arranged in parallel.
  • the film is transported by the belt conveyors to a position in the packaging machine in which a packaged product can be brought up to the film and packaged in the film.
  • the belt conveyors can be inserted into recesses in a guide plate of the film guide element by the movement of the film guide element. This defines a zero position of the belt conveyors. This ensures reliable transfer of the film from the film guide element into the film transport device.
  • the second belt conveyor can be moved a short distance relative to the first.
  • the guide plate is designed as a horizontal plate.
  • the known packaging machine requires a relatively large amount of space in the x direction. Furthermore, there is always a dirty handover of the film.
  • the packaging machine is basically designed to pack tray trays of different sizes.
  • the film transport device can only process films that have a defined width. This means that with smaller, i.e. less wide tray trays, foil is wasted because the film protrudes far beyond the shell in width and has to be folded under the packaging. There is more film there than is actually necessary.
  • the film also makes up a significant cost factor compared to the tray and label. Excessive film consumption can make this form of packaging economically unprofitable compared to other packaging.
  • the object of the present invention is to modify a packaging machine of the type defined at the outset and a packaging method in such a way that the packaging machine can be used more flexibly in its handling and the film consumption can be optimized for different sizes of the packaged goods.
  • a generic packaging machine which is characterized in that the guide plate of the film guide element is oriented vertically and that the guide plate has at least a third recess along its edge facing the belt conveyor devices, wherein the second belt conveyor for fixing a second zero position with respect to the width of the film can be inserted into the third recess instead of the second recess, or that at least the second recess of the guide plate for determining the second zero position with respect to the width of the film in one on the upper edge of the Guide plate displaceable recess element is formed.
  • the straps are not guided into the recess, but the plate is moved so that the straps lie in the recesses in the upper position of the plate.
  • the packaging machine according to the invention is relatively easy to convert to film rolls of different widths, even without mechanical modification on the packaging machine.
  • the distance between the belt conveyors can be adjusted to the respective width of the film currently in use by means of the various zero positions, without the need to replace parts of the packaging machine. This enables safe transfer and safe transport of films of different widths from the film guide element into the belt conveying devices of the film transport device.
  • At least one third recess is provided, with which a further zero position can be set.
  • the film Due to the vertical alignment of the guide plate, the film is aligned when it is transferred from the film guide element in the film transport device also in the vertical direction. This means that the film is handed over "standing", does not bend as easily as in the vertical or oblique direction and can therefore be passed between both belts with greater accuracy and ultimately passed over more securely.
  • the vertical orientation of the guide plate also enables a significant reduction in the footprint of the packaging machine compared to other orientations of the guide plate, as are known from the prior art.
  • the guide plate has, in addition to the first recess, more than two further recesses, in particular three further recesses, into which the second belt conveyor device can be inserted in order to fix more than two zero positions. This enables the safe processing of a wide range of foils with different widths.
  • a preferred embodiment of the packaging machine is characterized in that the distances between the first recess and the other recesses correspond to the commercial widths of plastic packaging films. Then the packaging machine can be adjusted exactly to the width of commercially available foils.
  • a preferred embodiment, in particular of the second alternative of the packaging machine according to the invention, is characterized in that that the height of the recess element in the vertical direction is greater than or equal to the height of the first recess, the upper edge of the guide plate being flush with the upper edge of the recess element and the height of the second recess in the recess element being the same as the height of the first recess.
  • the displaceable recess element can be locked in a locking device. This enables a stable positioning of the recess element at the different zero positions.
  • the latching device has various latching points along the upper edge of the guide plate, the distances of which from the first recess correspond in particular to the commercial widths of plastic packaging films.
  • the recess element can be positioned easily and quickly at the correct distances from the first recess.
  • the packaging machine can be characterized in that there is a further guide plate which is horizontally spaced and parallel to the first guide plate and which has recesses of the same design as the first guide plate, the film in the space between the two Guide plates can be transported. By moving the film between two guide plates, it is better to bend the film prevented.
  • gravity acts on the film only in a direction parallel to the plane of the film, not in a direction perpendicular to the plane of the film. A bending of the film in the direction perpendicular to the plane of the film is prevented on each side by a guide plate.
  • An advantageous embodiment is characterized in that the packaging machine has deflecting rollers, which in each case guide one of the transport belts endlessly and are arranged at the ends in the respective transport belt, with guide rollers for guiding the transport belts downstream of the deflecting rollers in each case in the transport direction of the film.
  • the belt conveyor devices each have a first, second, third, fourth, fifth and sixth guide roller.
  • the first guide roller guides the run of the first transport belt facing away from the second transport belt, forming a bend.
  • the second and third guide rollers guide the strand of the first transport belt facing the second transport belt.
  • the fourth and fifth guide rollers guide the run of the second transport belt facing the first transport belt, each forming a bend.
  • the sixth guide roller guides the run of the second transport belt facing away from the first transport belt, forming a bend.
  • a further preferred embodiment is characterized in that, after the film has been introduced into the film transport device for film supply to a packaged item to be packaged, the belt conveying devices can be spaced apart in the direction perpendicular to the film transport direction in order to stretch the film. This has the effect that the film lies smoothly against the packaged goods without folds or gaps.
  • the packaging machine can be characterized in that a packaging item, in particular a tray, can be conveyed to the film between the belt conveying devices by means of a packaging item transport device.
  • the goods to be packaged can be brought to the film in a simple manner by means of a conveyor belt and a lifting table between the belt conveyor devices.
  • the packaging machine comprises a film transport device in which the two mutually opposite transport belts of a belt conveyor device have a first and a second deflection roller.
  • the deflection rollers each run one of the transport belts continuously and are arranged at the end in the respective transport belt.
  • the packaging machine is characterized in that the first deflection roller projects with one end section beyond the transport belt assigned to it.
  • the first deflection roller has a first transport ring along its circumference at the end section.
  • the second deflection roller projects with one end section beyond the transport belt assigned to it.
  • the second deflection roller has a second transport ring at its end section along its circumference.
  • a first contact surface of the first transport ring with mechanical friction extends along the circumference of the first deflection roller.
  • a second contact surface of the second transport ring extends along the circumference of the second deflection roller with mechanical friction.
  • the contact surfaces are in frictional engagement. The end sections of the deflection rollers can hold the film securely due to the frictional engagement and thus ensure a stable transfer of the film from the film guiding element into the film transport device.
  • a method for packaging packaging goods in a packaging machine according to the invention by means of a stretchable film also falls within the scope of the present invention.
  • the latter is introduced by a movable film guide element into a film transport device for film feeding to a packaged item.
  • the film is transported through the film transport device in a film transport direction. After the film has been transported through the film transport device, the film is wrapped around a product to be packaged.
  • a first belt conveyor is introduced into a first recess of a guide plate of the film guide element and a second belt conveyor is inserted into a second recess of the guide plate to establish a first zero position with respect to the width of the film.
  • At least the second Belt conveyor is movable in a direction perpendicular to the film transport direction.
  • the method is characterized in that the second belt conveyor device is inserted into a third recess of the guide plate instead of the second recess in order to determine a second zero position with respect to the width of the film currently used.
  • the recess element is displaced on the upper edge of the guide plate and the second belt conveyor is inserted into the second recess on the recess element.
  • An advantageous embodiment of this method is characterized in that the film guide element is moved with the guide plate between a film dispensing device and the film transport device for film supply to a packaged item to be packaged in order to supply the film transport device with a film.
  • the film can be safely transferred for different distances between the film dispensing device and the film transport device.
  • a further embodiment of the method is characterized in that the film is applied by means of a film cutting device arranged in front of the film transport device in the film transport direction a desired film length is cut off.
  • the guide plates of the film guide element are guided through the film cutting device.
  • the guide plates of the film guide element are moved out of the cutting device, so that the knife of the film cutting device can cut off the film. The film is cut to the desired length before the cut film piece is transported by the film transport device into a packaging position.
  • Fig. 1 shows an isometric front view of a packaging machine 10 according to the invention for packaging packaging goods (not shown) by means of a stretchable film (likewise not shown).
  • the packaging machine has a film transport device 11 for feeding the film to a product to be packaged.
  • the first and the second belt conveyor 12a, 12b each have a first and a second transport belt 13a, 13b (see Fig. 2 ).
  • the transport belts 13a, 13b are in a film transport direction X (in which the film transport device 11 predetermined) Fig. 1 into the paper plane, represented by a cross) synchronously driven and arranged side by side.
  • the second belt conveyor 12b can be moved in a direction Y perpendicular to the film transport direction X by spindles 14a, 14b and a spindle motor 15 .
  • the film With a film guide element 16 of the packaging machine 10 which can be moved in the vertical direction Z , the film can be introduced from a film dispensing device 17 into the film transport device 11.
  • the term "vertical” particularly refers to the direction parallel to gravity.
  • the film dispenser 17 is formed below the film guide element 16 and the film transport device 11 above the film guide element 16.
  • the film guide element 16 has a first guide plate 18a and a second guide plate 18b (see Fig. 2 ).
  • the guide plates 18a, 18b are aligned vertically.
  • the film can be inserted between the guide plates 18a, 18b via a deflection roller 19 of the film guide element 16 at the lower end of the film guide element 16.
  • a first recess 21a and a second, third and fourth recess 21b, 21c, 21d are formed in an upper edge 20 of the guide plate 18a facing the belt conveying devices 12a, 12b in the vertical direction Z.
  • the film guide element 16 can be moved in the vertical direction Z.
  • the guide plate 18a can be moved at the level of the belt conveyors.
  • the border 22a of the first recess surrounds the first belt conveyor 12a.
  • the borders 22b, 22c, 22d of the second, third or fourth recess 21b, 21c, 21d encompass the second belt conveyor 12b.
  • the belt conveyors 12a, 12b are inserted into the recesses 21a-21d.
  • the choice between the second, third or fourth recess 21b-21d is made in such a way that the distance 23 of the belt conveying devices 12a, 12b in the recesses 21a-21d corresponds to the width of the film. This defines the zero positions of the belt conveyors with respect to the width of the film. If the second recess 21b surrounds the second belt conveyor 12b, this is referred to as "first zero position" in the context of the application. If the third recess 21c engages around the second belt conveyor 12b, this is referred to as "second zero position" in the context of the application. Accordingly, one can speak of a "third zero position" when the fourth recess 21d engages around the second belt conveyor 12b. Further recesses (not specifically shown in the drawing) can define further zero positions in a corresponding manner.
  • a film cutting device 25 is arranged in the vertical direction below the belt conveying devices.
  • the film is transported by the belt conveyor devices 12a, 12b until the film has a sufficient length measured from the film cutting device 25 for the desired packaging process.
  • the film guide element 16 with the guide plates 18a, 18b in the vertical direction downward toward the film dispenser 17 emotional.
  • the guide plate 18a, 18b of the film guide element 16 thus leave the film cutting device 25.
  • the film cutting device 25 then cuts through the film.
  • the cut film is then transported through the belt conveyors 12a, 12b until the cut part of the film is positioned vertically above a lift table (not shown). The lift table will later move the packaged goods in the vertical direction.
  • the cut-off part of the film is thus arranged vertically above the packaged goods between the belt conveyors 12a, 12b.
  • the film is stretched by moving the belt conveyor 12b in the Y direction perpendicular to the film transport direction X.
  • a product to be packaged for example a tray, can be brought to the film between the transport belts 13a, 13b by means of a product to be transported (not shown).
  • a packaging material transport device can comprise a feed conveyor belt and a lifting table, as in that cited above EP 3 093 244 B1 shown.
  • the packaging material When the packaging material is brought up to the film by a lifting process, the film wraps around the packaging material. Folding tongs (not shown) allow the film to be wrapped around the packaged goods.
  • the packaged goods can then be pushed by a pusher (not shown) onto a sealing plate, on which the film is welded, and finally transported away by a conveyor belt, as in FIG EP 3 093 244 B1 cited.
  • the Fig. 2 shows an isometric front view of a section of the packaging machine 10 with the belt conveyors 12a, 12b and the film guide element 16 from obliquely above.
  • the film cutting device 25 is not shown.
  • the first and second guide plates 18a, 18b of the Shown film guide element 16 between which the film is transported.
  • the belt conveyors 12a, 12b have recesses 26 for the upper edge 20 of the guide plates 18a, 18b.
  • the borders 22a-22d of the recesses 21a-21d encompass the belt conveyors 12a, 12b.
  • the transport belts 13a, 13b are each guided by a deflection roller 27a, 27b arranged at the end in the transport belts 13a, 13b.
  • the deflection rollers 27a, 27b are followed by a first, second, third, fourth, fifth and sixth guide roller 28a, 28b, 28c, 28d, 28e, 28f for guiding the transport belts 13a, 13b in the film transport direction X.
  • the Fig. 3 shows a side view of an end 31 of the belt conveyor 12b with the deflection rollers 27a, 27b and the guide rollers 28a-28f.
  • the first guide roller 28a guides the run 29a of the first transport belt 13a facing away from the second transport belt 13b, forming a bend 30a which transfers the run 29a facing away from the second transport belt 13b from a substantially vertical orientation Z to a horizontal orientation H.
  • the second and third guide rollers 28b, 28c guide the run 29b of the first transport belt 13a facing the second transport belt 13b.
  • the fourth and fifth guide rollers 28d, 28e guide the run 29c of the second transport belt 13b facing the first transport belt 13a, each forming a bend 30b, 30c, with these bends 30b, 30c transferring the run 29c facing the first transport belt 13a from one in Essentially vertical alignment Z is brought about in a horizontal alignment H.
  • the sixth guide roller 28f guides the run 29d of the second transport belt facing away from the first transport belt 13a 13b with the formation of a bend 30d, the bend 30d converting the strand 29d facing away from the first transport belt 13a from a substantially vertical orientation Z into a horizontal orientation H.
  • the transport belts 13a, 13b abut one another.
  • the bends 30b, 30c of the run 29c of the second transport belt 13b facing the first transport belt 13a are transferred to the run 29b of the first transport belt 13a facing the second transport belt 13b.
  • the film can be inserted between the two abutting transport belts 13a, 13b for transport.
  • a spindle 14a, 14b By means of a spindle nut 32 of the belt conveyor device 12b, a spindle 14a, 14b (see FIG. Fig. 1 ) to adjust the distance between the belt conveyors 12a, 12b, the belt conveyor 12b in the direction Y perpendicular to the film transport direction X (see. Fig. 1 ) to lead.
  • the belt conveyor 12a remains fixed in the y direction. The distance between the two belt conveyors 12a, 12b can thus be changed.
  • the Fig. 4 shows an isometric view of a part of the packaging machine 10 with a belt conveyor 12b and the film guide element 16.
  • the film guide element 16 has a first motor 33a and a first gear transmission 34a with a gear 35a for moving the film guide element 16.
  • the spindles 14a, 14b for the lateral movement of the Belt conveyor 12b are driven by the spindle motor 15 with a second gear transmission 34b rotated. Also shown is a second motor 33b for driving the belt conveyor 12b.
  • the Fig. 5 shows an isometric rear view of the film guide element 16 and the film cutting device 25.
  • the movement of the film guide element 16 is guided by the first gear transmission 34a with gears 35a, 35b and the first motor 33a.
  • Via a deflection roller 19 of the film guide element 16 and a rear guide roller 36 the film from the film dispenser 17 (see Fig. 1 ) between the guide plates 18a, 18b (in Fig. 5 : Guide plate 18b) guided.
  • the film cutting device 25 has a lifting magnet 33c for driving the movement of the knife (not shown) of the film cutting device 25 for cutting through the film.
  • the Fig. 6 shows an isometric view of the belt conveyors 12a, 12b and the film guide element 16 with the guide plates 18a, 18b in the open state.
  • the first guide plate 18a is opened.
  • a film can be inserted into the film guide element 16 between the two film plates 18a, 18b.
  • the guide plate 18a can be closed again and the film guide element 16 can thus be closed.
  • the Fig. 7 shows an isometric front view of the film guide element 16 and the lower side of the belt conveyors 12a, 12b, the film guide element 16 being moved into its uppermost position.
  • the belt conveyors 12a, 12b are in the first zero position.
  • the first belt conveyor 12a is inserted into the first recess 21a and the second belt conveyor 12b is inserted into the second recess 21b.
  • the film in the film guide element 16 is inserted into the belt conveyors 12a, 12b and thereby transferred to the film transport device 11.
  • the Fig. 8 shows a longitudinal section of the guide plate 18a of the film guide element 16 (s. Fig. 1 ) in a second embodiment.
  • the guide plate 18a has a displaceable recess element 37 in which the second recess 21b is formed.
  • the height h 1 of the recess element 37 in the vertical direction Z is greater than the height h 2 of the first recess 21a.
  • the upper edge 20 of the guide plate 18a and the upper edge 38 of the recess element 37 are aligned.
  • the height h 3 of the second recess 21b is the same as the height h 2 of the first recess 21b.
  • Second guide plate 12b is designed accordingly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)

Description

Die Erfindung betrifft eine Verpackungsmaschine sowie ein Verfahren zum Verpacken von Verpackungsgütern mittels einer dehnbaren Folie, mit einer Folientransportvorrichtung zur Folienzuführung zu einem zu verpackenden Verpackungsgut, die eine erste und eine zweite Riemenfördereinrichtung zum Transport der Folie aufweist, welche jeweils einen ersten und einen zweiten Transportriemen umfassen, die in einer durch die Folientransportvorrichtung vorgegebenen Folientransportrichtung synchron angetrieben und nebeneinander angeordnet sind, wobei zumindest die zweite Riemenfördereinrichtung in einer Richtung senkrecht zur Folientransportrichtung bewegbar ist, und mit einem bewegbaren Folienführungselement, mit dem die Folie in die Folientransportvorrichtung einführbar ist, wobei das Folienführungselement eine Führungsplatte zur Führung der Folie umfasst, die in einer den Riemenfördereinrichtungen zugewandten, in vertikaler Richtung oberen Kante eine erste sowie eine zweite Ausnehmung aufweist, wobei die erste Riemenfördereinrichtung in die erste Ausnehmung und die zweite Riemenfördereinrichtung in die zweite Ausnehmung einführbar ist, wodurch eine erste Nullposition bezüglich der Breite der Folie festgelegt ist.The invention relates to a packaging machine and a method for packaging packaging goods by means of a stretchable film, with a film transport device for film feeding to a packaging material to be packaged, which has a first and a second belt conveyor for transporting the film, which each comprise a first and a second transport belt , which are driven synchronously in a film transport direction predetermined by the film transport device and are arranged next to one another, at least the second belt conveyor being movable in a direction perpendicular to the film transport direction, and with a movable film guide element with which the film can be inserted into the film transport device, the film guide element being one Guide plate for guiding the film, which has a first and a second recess in a vertical edge facing the belt conveying devices, w The first belt conveyor can be inserted into the first recess and the second belt conveyor can be inserted into the second recess, whereby a first zero position with respect to the width of the film is established.

Aus der EP 3 093 244 B1 ist eine derartige Verpackungsmaschine zum Verpacken von Verpackungsgütern mittels Folien bekannt, die dazu ausgebildet es, die Dehnfolie von der Vorratsrolle an die Verpackungseinrichtung zu übergeben.From the EP 3 093 244 B1 A packaging machine of this type is known for packaging packaging goods by means of films, which are designed to transfer the stretch film from the supply roll to the packaging device.

Die Folien werden von einer Folienspendeeinrichtung durch ein bewegliches Folienführungselement zu einer Folientransportvorrichtung befördert. Die Folientransportvorrichtung hat zwei parallel angeordnete, synchron betriebene Riemenfördereinrichtungen. Durch die Riemenfördereinrichtungen wird die Folie an eine Position in der Verpackungsmaschine transportiert, in der ein Verpackungsgut an die Folie herangeführt und in der Folie verpackt werden kann. Die Riemenfördereinrichtungen lassen sich durch die Bewegung des Folienführungselements in Ausnehmungen einer Führungsplatte des Folienführungselements einführen. Dies definiert eine Nullposition der Riemenfördereinrichtungen. Dadurch ist eine sichere Übergabe der Folie von dem Folienführungselement in die Folientransportvorrichtung gewährleistet. Zum "Stretchen" der Folie in ihrer Querrichtung ist die zweite Riemenfördereinrichtung relativ zur ersten um eine geringe Strecke bewegbar. Die Führungsplatte ist als horizontales Blech ausgeführt.The films are conveyed from a film dispenser through a movable film guide element to a film transport device. The film transport device has two synchronously operated belt conveyors arranged in parallel. The film is transported by the belt conveyors to a position in the packaging machine in which a packaged product can be brought up to the film and packaged in the film. The belt conveyors can be inserted into recesses in a guide plate of the film guide element by the movement of the film guide element. This defines a zero position of the belt conveyors. This ensures reliable transfer of the film from the film guide element into the film transport device. To "stretch" the film in its transverse direction, the second belt conveyor can be moved a short distance relative to the first. The guide plate is designed as a horizontal plate.

Die bekannte Verpackungsmaschine benötigt allerdings relativ viel Platz in x Richtung. Des Weiteren kommt es immer wieder zur unsauberen Übergabe der Folie.However, the known packaging machine requires a relatively large amount of space in the x direction. Furthermore, there is always a dirty handover of the film.

Die Verpackungsmaschine ist grundsätzlich dazu ausgelegt, verschieden große Trayschalen zu verpacken. Die Folientransporteinrichtung kann jedoch nur Folien verarbeiten, die eine definierte Breite haben. Das führt dazu, dass bei kleineren, also weniger breiten Trayschalen Folie verschwendet wird, da die Folie in der Breite weit über die Schale übersteht und unterhalb des Verpackungsgutes zusammengefaltet werden muss. Dort befindet sich mehr Folie als eigentlich notwendig. Bei den Gesamtkosten der Verpackung macht die Folie auch im Vergleich zur Trayschale und zum Etikett einen erheblichen Kostenfaktor aus. Ein zu hoher Folienverbrauch kann diese Form der Verpackung im Vergleich zu anderen Verpackungen wirtschaftlich unrentabel machen.The packaging machine is basically designed to pack tray trays of different sizes. However, the film transport device can only process films that have a defined width. This means that with smaller, i.e. less wide tray trays, foil is wasted because the film protrudes far beyond the shell in width and has to be folded under the packaging. There is more film there than is actually necessary. In terms of the total cost of packaging, the film also makes up a significant cost factor compared to the tray and label. Excessive film consumption can make this form of packaging economically unprofitable compared to other packaging.

Aufgabe der vorliegenden Erfindung ist es demgegenüber, eine Verpackungsmaschine der eingangs definierten Art sowie ein Verpackungsverfahren so zu modifizieren, dass die Verpackungsmaschine in ihrer Handhabung flexibler einsetzbar ist und der Folienverbrauch für unterschiedliche Größen des Verpackungsgutes optimiert werden kann.In contrast, the object of the present invention is to modify a packaging machine of the type defined at the outset and a packaging method in such a way that the packaging machine can be used more flexibly in its handling and the film consumption can be optimized for different sizes of the packaged goods.

Gelöst wird diese Aufgabe hinsichtlich der Vorrichtung auf technisch besonders einfache und überraschend wirkungsvolle Weise durch eine gattungsgemäße Verpackungsmaschine, die sich dadurch auszeichnet, dass die Führungsplatte des Folienführungselements vertikal ausgerichtet ist, und dass die Führungsplatte entlang ihrer den Riemenfördereinrichtungen zugewandten Kante zumindest eine dritte Ausnehmung aufweist, wobei die zweite Riemenfördereinrichtung zur Festlegung einer zweiten Nullposition bezüglich der Breite der Folie anstelle der zweiten Ausnehmung in die dritte Ausnehmung einführbar ist, oder dass zumindest die zweite Ausnehmung der Führungsplatte zur Festlegung der zweiten Nullposition bezüglich der Breite der Folie in einem auf der oberen Kante der Führungsplatte verschiebbaren Ausnehmungselement ausgebildet ist.This object is achieved in terms of the device in a technically particularly simple and surprisingly effective manner by a generic packaging machine which is characterized in that the guide plate of the film guide element is oriented vertically and that the guide plate has at least a third recess along its edge facing the belt conveyor devices, wherein the second belt conveyor for fixing a second zero position with respect to the width of the film can be inserted into the third recess instead of the second recess, or that at least the second recess of the guide plate for determining the second zero position with respect to the width of the film in one on the upper edge of the Guide plate displaceable recess element is formed.

Dabei werden in der Regel nicht die Riemen in die Ausnehmung geführt, sondern die Platte wird bewegt, so dass in der oberen Stellung der Platte die Riemen in den Ausnehmungen liegen.As a rule, the straps are not guided into the recess, but the plate is moved so that the straps lie in the recesses in the upper position of the plate.

Die erfindungsgemäße Verpackungsmaschine ist relativ einfach auf Folienrollen verschiedener Breite umrüstbar, und zwar auch ohne einen mechanischen Umbau an der Verpackungsmaschine.The packaging machine according to the invention is relatively easy to convert to film rolls of different widths, even without mechanical modification on the packaging machine.

Der Abstand der Riemenfördereinrichtungen lässt sich durch die verschiedenen Nullpositionen an die jeweilige Breite der aktuell verwendeten Folie anpassen, ohne dass hierfür Teile der Verpackungsmaschine ausgetauscht werden müssen. Dies ermöglicht eine sichere Übergabe und den sicheren Transport verschieden breiter Folien von dem Folienführungselement in die Riemenfördereinrichtungen der Folientransportvorrichtung.The distance between the belt conveyors can be adjusted to the respective width of the film currently in use by means of the various zero positions, without the need to replace parts of the packaging machine. This enables safe transfer and safe transport of films of different widths from the film guide element into the belt conveying devices of the film transport device.

In der ersten, besonders einfach herzustellenden Alternative der Erfindung ist zusätzlich zu den beiden bekannten festen Ausnehmungen in der Oberkante der Führungsplatte zumindest eine dritte Ausnehmung vorgesehen, mit welcher sich eine weitere Nullposition einstellen lässt.In the first, particularly easy to manufacture alternative of the invention, in addition to the two known fixed recesses in the upper edge of the guide plate, at least one third recess is provided, with which a further zero position can be set.

Das gleiche lässt sich bei der zweiten, etwas komfortableren Alternative der Erfindung mittels eines auf der Oberkante verschiebbaren Ausnehmungselements erreichen, in welchem die zweite Ausnehmung ausgebildet ist. Diese Ausführung der Erfindung ermöglicht zudem eine kontinuierliche anstatt einer diskreten Einstellung der ersten und aller weiteren Nullpositionen.The same can be achieved in the second, somewhat more comfortable alternative of the invention by means of a recess element which is displaceable on the upper edge and in which the second recess is formed. This embodiment of the invention also enables a continuous instead of a discrete setting of the first and all further zero positions.

Durch die vertikale Ausrichtung der Führungsplatte erfolgt die Ausrichtung der Folie bei der Übergabe von dem Folienführungselement in die Folientransportvorrichtung ebenfalls in vertikaler Richtung. Damit wird die Folie "stehend" übergeben, biegt nicht so leicht um wie in vertikaler oder schräger Richtung und kann deswegen zielsicherer zwischen beide Riemen geführt und letztlich sicherer übergeben werden.Due to the vertical alignment of the guide plate, the film is aligned when it is transferred from the film guide element in the film transport device also in the vertical direction. This means that the film is handed over "standing", does not bend as easily as in the vertical or oblique direction and can therefore be passed between both belts with greater accuracy and ultimately passed over more securely.

Die vertikale Ausrichtung der Führungsplatte ermöglicht zudem eine wesentliche Reduzierung der Standfläche der Verpackungsmaschine im Vergleich zu anderen Ausrichtungen der Führungsplatte, wie sie aus dem Stand der Technik bekannt sind.The vertical orientation of the guide plate also enables a significant reduction in the footprint of the packaging machine compared to other orientations of the guide plate, as are known from the prior art.

Es ergibt sich daraus auch eine etwas andere Anordnung der Umlenkrollen als beispielsweise in der eingangs zitierte EP 3 093 244 B1 .This also results in a somewhat different arrangement of the deflection rollers than, for example, that cited at the beginning EP 3 093 244 B1 .

Bei vorteilhaften Ausführungsformen insbesondere der ersten Alternative der erfindungsgemäßen Verpackungsmaschine weist die Führungsplatte zusätzlich zu der ersten Ausnehmung mehr als zwei weitere Ausnehmungen, insbesondere drei weitere Ausnehmungen, auf, in die die zweite Riemenfördereinrichtung zur Festlegung von mehr als zwei Nullpositionen einführbar ist. Dies ermöglicht die sichere Verarbeitung einer Bandbreite an Folie mit unterschiedlicher Breite.In advantageous embodiments, in particular the first alternative of the packaging machine according to the invention, the guide plate has, in addition to the first recess, more than two further recesses, in particular three further recesses, into which the second belt conveyor device can be inserted in order to fix more than two zero positions. This enables the safe processing of a wide range of foils with different widths.

Eine bevorzugte Ausbildung der Verpackungsmaschine ist dadurch gekennzeichnet, dass die Abstände der ersten Ausnehmung zu den anderen Ausnehmungen handelsüblichen Breiten von Verpackungsfolien aus Kunststoff entsprechen. Dann kann die Verpackungsmaschine genau auf die Breite handelsüblicher Folien eingestellt werden.A preferred embodiment of the packaging machine is characterized in that the distances between the first recess and the other recesses correspond to the commercial widths of plastic packaging films. Then the packaging machine can be adjusted exactly to the width of commercially available foils.

Eine bevorzugte Ausgestaltung insbesondere der zweiten Alternative der erfindungsgemäßen Verpackungsmaschine ist dadurch gekennzeichnet, dass die Höhe des Ausnehmungselements in vertikaler Richtung größer oder gleich der Höhe der ersten Ausnehmung ist, wobei die obere Kante der Führungsplatte mit der oberen Kante des Ausnehmungselements fluchtet und die Höhe der zweiten Ausnehmung in dem Ausnehmungselement gleich ist wie die Höhe der ersten Ausnehmung. Dadurch können die Riemenfördereinrichtungen bei gleicher Ausbildung mit gleicher Tiefe besonders einfache in die Ausnehmungen eingeführt werden.A preferred embodiment, in particular of the second alternative of the packaging machine according to the invention, is characterized in that that the height of the recess element in the vertical direction is greater than or equal to the height of the first recess, the upper edge of the guide plate being flush with the upper edge of the recess element and the height of the second recess in the recess element being the same as the height of the first recess. As a result, the belt conveying devices can be inserted into the recesses in a particularly simple manner with the same design and the same depth.

Bei einer weiteren Ausführungsform der Verpackungsmaschine ist das verschiebbare Ausnehmungselement in einer Rastvorrichtung verrastbar. Dies ermöglicht eine stabile Positionierung des Ausnehmungselements auf den verschiedenen Nullpositionen.In a further embodiment of the packaging machine, the displaceable recess element can be locked in a locking device. This enables a stable positioning of the recess element at the different zero positions.

Eine vorteilhafte Weiterbildung dieser Ausführungsform ist dadurch gekennzeichnet, dass die Rastvorrichtung verschiedene Einraststellen längs der oberen Kante der Führungsplatte aufweist, deren Abstände zur ersten Ausnehmung insbesondere handelsüblichen Breiten von Verpackungsfolien aus Kunststoff entsprechen. Dadurch kann das Ausnehmungselement auf einfache und schnelle Weise in den richtigen Abständen zu der ersten Ausnehmung positioniert werden.An advantageous further development of this embodiment is characterized in that the latching device has various latching points along the upper edge of the guide plate, the distances of which from the first recess correspond in particular to the commercial widths of plastic packaging films. As a result, the recess element can be positioned easily and quickly at the correct distances from the first recess.

Die Verpackungsmaschine kann gemäß einer weiteren bevorzugten Ausgestaltung dadurch gekennzeichnet sein, dass eine weitere Führungsplatte vorhanden ist, welche horizontal beabstandet und parallel zu der ersten Führungsplatte verläuft, und welche gleich ausgebildete Ausnehmungen wie die erste Führungsplatte aufweist, wobei die Folie in dem Zwischenraum zwischen den beiden Führungsplatten transportierbar ist. Durch den Transport der Folie zwischen zwei Führungsplatten wird ein Umbiegen der Folie besser verhindert. Insbesondere bei vertikaler Anordnung der beiden Führungsplatten wirkt die Schwerkraft auf die Folie nur in eine Richtung parallel zur Ebene der Folie, nicht in eine Richtung senkrecht zur Ebene der Folie. Ein Umbiegen der Folie in Richtung senkrecht zur Ebene der Folie wird auf jeder Seite durch jeweils eine Führungsplatte verhindert.According to a further preferred embodiment, the packaging machine can be characterized in that there is a further guide plate which is horizontally spaced and parallel to the first guide plate and which has recesses of the same design as the first guide plate, the film in the space between the two Guide plates can be transported. By moving the film between two guide plates, it is better to bend the film prevented. In particular when the two guide plates are arranged vertically, gravity acts on the film only in a direction parallel to the plane of the film, not in a direction perpendicular to the plane of the film. A bending of the film in the direction perpendicular to the plane of the film is prevented on each side by a guide plate.

Eine vorteilhafte Ausführungsform zeichnet sich dadurch aus, dass die Verpackungsmaschine Umlenkrollen aufweist, welche jeweils einen der Transportriemen endlos umlaufend führen und in dem jeweiligen Transportriemen endseitig angeordnet sind, wobei in den Transportriemen jeweils Führungsrollen zur Führung der Transportriemen in Folientransportrichtung den Umlenkrollen nachgelagert sind.An advantageous embodiment is characterized in that the packaging machine has deflecting rollers, which in each case guide one of the transport belts endlessly and are arranged at the ends in the respective transport belt, with guide rollers for guiding the transport belts downstream of the deflecting rollers in each case in the transport direction of the film.

Bei einer bevorzugten Weiterbildung dieser Ausführungsform weisen die Riemenfördereinrichtungen jeweils eine erste, zweite, dritte, vierte, fünfte und sechste Führungsrolle auf. Dabei führt die erste Führungsrolle das von dem zweiten Transportriemen abgewandte Trum des ersten Transportriemens unter Ausbildung einer Biegung. Die zweite und die dritte Führungsrolle führen das dem zweiten Transportriemen zugewandte Trum des ersten Transportriemens. Die vierte und fünfte Führungsrolle führen das dem ersten Transportriemen zugewandte Trum des zweiten Transportriemens unter Ausbildung jeweils einer Biegung. Die sechste Führungsrolle führt das von dem ersten Transportriemen abgewandte Trum des zweiten Transportriemens unter Ausbildung einer Biegung. Diese Anordnung von Umlenkrollen und Führungsrollen ermöglicht eine Überführung der Transportriemen von einer im Wesentlichen vertikalen Ausrichtung in eine horizontale Ausrichtung. Hierfür können der erste und zweite Transportriemen aneinander anliegen, um die Biegung eines Transportriemens auf den anderen zu übertragen.In a preferred development of this embodiment, the belt conveyor devices each have a first, second, third, fourth, fifth and sixth guide roller. The first guide roller guides the run of the first transport belt facing away from the second transport belt, forming a bend. The second and third guide rollers guide the strand of the first transport belt facing the second transport belt. The fourth and fifth guide rollers guide the run of the second transport belt facing the first transport belt, each forming a bend. The sixth guide roller guides the run of the second transport belt facing away from the first transport belt, forming a bend. This arrangement of deflection rollers and guide rollers enables the transport belts to be transferred from an essentially vertical orientation to a horizontal orientation. The first and second conveyor belts can be used for this abut each other to transfer the bend of one conveyor belt to the other.

Eine weitere bevorzugte Ausführungsform ist dadurch gekennzeichnet, dass die Riemenfördereinrichtungen nach Einführung der Folie in die Folientransportvorrichtung zur Folienzuführung zu einem zu verpackenden Verpackungsgut in der Richtung senkrecht zu der Folientransportrichtung im Abstand voneinander entfernbar sind, um die Folie zu dehnen. Dadurch wird bewirkt, dass die Folie ohne Falten oder Zwischenräume glatt an dem Verpackungsgut anliegt.A further preferred embodiment is characterized in that, after the film has been introduced into the film transport device for film supply to a packaged item to be packaged, the belt conveying devices can be spaced apart in the direction perpendicular to the film transport direction in order to stretch the film. This has the effect that the film lies smoothly against the packaged goods without folds or gaps.

Die Verpackungsmaschine kann gemäß einer weiteren vorteilhaften Ausführungsform dadurch gekennzeichnet sein, dass mittels einer Verpackungsguttransportvorrichtung ein Verpackungsgut, insbesondere eine Trayschale, zwischen die Riemenfördereinrichtungen an die Folie beförderbar ist. Das Verpackungsgut kann durch ein Förderband und einen Hubtisch zwischen die Riemenfördereinrichtungen und damit auf einfache Weise an die Folie herangeführt werden.According to a further advantageous embodiment, the packaging machine can be characterized in that a packaging item, in particular a tray, can be conveyed to the film between the belt conveying devices by means of a packaging item transport device. The goods to be packaged can be brought to the film in a simple manner by means of a conveyor belt and a lifting table between the belt conveyor devices.

Bei einer weiteren Klasse von bevorzugten Ausführungsformen umfasst die erfindungsgemäße Verpackungsmaschine eine Folientransportvorrichtung, bei welcher die zwei einander gegenüberliegenden Transportriemen einer Riemenfördereinrichtung eine erste sowie eine zweite Umlenkrolle aufweisen. Die Umlenkrollen führen jeweils einen der Transportriemen endlos umlaufend und sind in dem jeweiligen Transportriemen endseitig angeordnet. Die Verpackungsmaschine ist bei dieser weiteren Ausbildung dadurch gekennzeichnet, dass die erste Umlenkrolle mit einem Endabschnitt über den ihr zugeordneten Transportriemen hinausragt. Dabei weist die erste Umlenkrolle an dem Endabschnitt entlang ihres Umfangs einen ersten Transportring auf. Die zweite Umlenkrolle ragt mit einem Endabschnitt über den ihr zugeordneten Transportriemen hinaus. Die zweite Umlenkrolle weist an dem Endabschnitt entlang ihres Umfangs einen zweiten Transportring auf.In a further class of preferred embodiments, the packaging machine according to the invention comprises a film transport device in which the two mutually opposite transport belts of a belt conveyor device have a first and a second deflection roller. The deflection rollers each run one of the transport belts continuously and are arranged at the end in the respective transport belt. In this further embodiment, the packaging machine is characterized in that the first deflection roller projects with one end section beyond the transport belt assigned to it. Here the first deflection roller has a first transport ring along its circumference at the end section. The second deflection roller projects with one end section beyond the transport belt assigned to it. The second deflection roller has a second transport ring at its end section along its circumference.

Eine erste Kontaktfläche des ersten Transportrings mit mechanischer Friktion erstreckt sich entlang des Umfangs der ersten Umlenkrolle. Eine zweite Kontaktfläche des zweiten Transportrings erstreckt sich mit mechanischer Friktion entlang des Umfangs der zweiten Umlenkrolle. Die Kontaktflächen liegen unter Reibschluss aneinander an. Die Endabschnitte der Umlenkrollen können die Folie durch den Reibschluss sicher fassen und damit für eine stabile Übergabe der Folie vom Folienführungselement in die Folientransportvorrichtung sorgen.A first contact surface of the first transport ring with mechanical friction extends along the circumference of the first deflection roller. A second contact surface of the second transport ring extends along the circumference of the second deflection roller with mechanical friction. The contact surfaces are in frictional engagement. The end sections of the deflection rollers can hold the film securely due to the frictional engagement and thus ensure a stable transfer of the film from the film guiding element into the film transport device.

In den Rahmen der vorliegenden Erfindung fällt auch ein Verfahren zum Verpacken von Verpackungsgütern in einer erfindungsgemäßen Verpackungsmaschine mittels einer dehnbaren Folie. Letztere wird durch ein bewegbares Folienführungselement in eine Folientransportvorrichtung zur Folienzuführung zu einem zu verpackenden Verpackungsgut eingeführt. Dabei wird die Folie durch die Folientransportvorrichtung in einer Folientransportrichtung transportiert. Nach dem Transport der Folie durch die Folientransportvorrichtung wird die Folie um ein Verpackungsgut gewickelt. Bei der Einführung der Folie in die Folientransportvorrichtung wird eine erste Riemenfördereinrichtung in eine erste Ausnehmung einer Führungsplatte des Folienführungselements eingeführt und zur Festlegung einer ersten Nullposition bezüglich der Breite der Folie eine zweite Riemenfördereinrichtung in eine zweite Ausnehmung der Führungsplatte eingeführt. Zumindest die zweite Riemenfördereinrichtung ist in einer Richtung senkrecht zu der Folientransportrichtung bewegbar.A method for packaging packaging goods in a packaging machine according to the invention by means of a stretchable film also falls within the scope of the present invention. The latter is introduced by a movable film guide element into a film transport device for film feeding to a packaged item. The film is transported through the film transport device in a film transport direction. After the film has been transported through the film transport device, the film is wrapped around a product to be packaged. When the film is introduced into the film transport device, a first belt conveyor is introduced into a first recess of a guide plate of the film guide element and a second belt conveyor is inserted into a second recess of the guide plate to establish a first zero position with respect to the width of the film. At least the second Belt conveyor is movable in a direction perpendicular to the film transport direction.

Das Verfahren ist dadurch gekennzeichnet, dass die zweite Riemenfördereinrichtung zur Festlegung einer zweiten Nullposition bezüglich der Breite der aktuell verwendeten Folie anstelle der zweiten Ausnehmung in eine dritte Ausnehmung der Führungsplatte eingeführt wird. Alternativ wird zur Festlegung der zweiten Nullposition das Ausnehmungselement auf der oberen Kante der Führungsplatte verschoben und die zweite Riemenfördereinrichtung in die zweite Ausnehmung auf dem Ausnehmungselement eingeführt. Bei diesem Verfahren wird der Abstand der Riemenfördereinrichtungen durch die verschiedenen Nullpositionen an die Breite der Folie angepasst, ohne dass hierfür Teile der Verpackungsmaschine ausgetauscht werden müssen. Die Übergabe der Folie von dem Folienführungselement in die Riemenfördereinrichtungen der Folientransportvorrichtung kann bei verschiedenen Breiten der Folie auf sichere und schnelle Weise erfolgen.The method is characterized in that the second belt conveyor device is inserted into a third recess of the guide plate instead of the second recess in order to determine a second zero position with respect to the width of the film currently used. Alternatively, in order to fix the second zero position, the recess element is displaced on the upper edge of the guide plate and the second belt conveyor is inserted into the second recess on the recess element. With this method, the distance between the belt conveyors is adjusted to the width of the film by the various zero positions, without the need to replace parts of the packaging machine. The transfer of the film from the film guide element into the belt conveying devices of the film transport device can be carried out safely and quickly with different widths of the film.

Eine vorteilhafte Ausgestaltung dieses Verfahrens ist dadurch gekennzeichnet, dass das Folienführungselement mit der Führungsplatte zwischen einer Folienspendeeinrichtung und der Folientransportvorrichtung zur Folienzuführung zu einem zu verpackenden Verpackungsgut bewegt wird, um der Folientransportvorrichtung eine Folie zuzuführen. Dadurch kann für verschiedene Abstände zwischen der Folienspendeeinrichtung und der Folientransportvorrichtung eine sichere Übergabe der Folie stattfinden.An advantageous embodiment of this method is characterized in that the film guide element is moved with the guide plate between a film dispensing device and the film transport device for film supply to a packaged item to be packaged in order to supply the film transport device with a film. As a result, the film can be safely transferred for different distances between the film dispensing device and the film transport device.

Eine weitere Ausbildung des Verfahrens ist dadurch gekennzeichnet, dass die Folie mittels einer in Folientransportrichtung vor der Folientransportvorrichtung angeordneten Folienschneideinrichtung auf eine gewünschte Folienlänge abgeschnitten wird. Zur Einführung der Folie in die Folientransportvorrichtung werden die Führungsplatten des Folienführungselements durch die Folienschneideinrichtung geführt. Nach der Einführung der Folie in die Folientransportvorrichtung werden die Führungsplatten des Folienführungselements aus der Schneideinrichtung heraus bewegt, so dass das Messer der Folienschneideinrichtung die Folie abschneiden kann. Die Folie wird so auf die gewünschte Länge geschnitten, bevor das abgeschnittene Folienstück durch die Folientransportvorrichtung in eine Verpackungsposition transportiert wird.A further embodiment of the method is characterized in that the film is applied by means of a film cutting device arranged in front of the film transport device in the film transport direction a desired film length is cut off. To insert the film into the film transport device, the guide plates of the film guide element are guided through the film cutting device. After the film has been introduced into the film transport device, the guide plates of the film guide element are moved out of the cutting device, so that the knife of the film cutting device can cut off the film. The film is cut to the desired length before the cut film piece is transported by the film transport device into a packaging position.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden detaillierten Beschreibung von Ausführungsbeispielen der Erfindung anhand der Figuren der Zeichnung, die erfindungswesentliche Einzelheiten zeigt, sowie aus den Ansprüchen. Die einzelnen Merkmale können je einzeln für sich oder zu mehreren in beliebigen Kombinationen bei Varianten der Erfindung verwirklicht sein.Further features and advantages of the invention result from the following detailed description of exemplary embodiments of the invention with reference to the figures of the drawing, which shows details essential to the invention, and from the claims. The individual features can each be implemented individually or in groups in any combination in variants of the invention.

In der schematischen Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt, welche in der nachfolgenden Beschreibung näher erläutert werden.The schematic drawing shows exemplary embodiments of the invention, which are explained in more detail in the following description.

Es zeigen:

Fig. 1
eine isometrische Vorderansicht auf eine Verpackungsmaschine zum Verpacken von Verpackungsgütern;
Fig. 2
eine isometrische Vorderansicht eines Ausschnitts der Verpackungsmaschine mit Riemenfördereinrichtungen und einem Folienführungselement von schräg oben;
Fig. 3
eine Seitenansicht eines Endes der Riemenfördereinrichtung mit Umlenkrollen und Führungsrollen;
Fig. 4
eine isometrische Ansicht eines Teils der Verpackungsmaschine mit der Riemenfördereinrichtung und dem Folienführungselement;
Fig. 5
eine isometrische Rückansicht des Folienführungselements und der Folienschneideinrichtung;
Fig. 6
eine isometrische Ansicht der Riemenfördereinrichtungen und des Folienführungselements in geöffnetem Zustand;
Fig. 7
eine isometrische Vorderansicht des Folienführungselements und der unteren Seite der Riemenfördereinrichtungen, wobei das Folienführungselement in seine oberste Position verfahren ist;
Fig. 8
einen Längsschnitt der Führungsplatte des Folienführungselements (s. Fig. 1) in einer zweiten Ausführungsform.
Show it:
Fig. 1
an isometric front view of a packaging machine for packaging packaging goods;
Fig. 2
an isometric front view of a section of the packaging machine with belt conveyors and a film guide element obliquely from above;
Fig. 3
a side view of one end of the belt conveyor with pulleys and guide rollers;
Fig. 4
an isometric view of part of the packaging machine with the belt conveyor and the film guide element;
Fig. 5
an isometric rear view of the film guide member and the film cutter;
Fig. 6
an isometric view of the belt conveyors and the film guide member in the open state;
Fig. 7
an isometric front view of the film guide member and the lower side of the belt conveyors with the film guide member moved to its uppermost position;
Fig. 8
a longitudinal section of the guide plate of the film guide element (s. Fig. 1 ) in a second embodiment.

Fig. 1 zeigt eine isometrische Vorderansicht auf eine erfindungsgemäße Verpackungsmaschine 10 zum Verpacken von Verpackungsgütern (nicht gezeigt) mittels einer dehnbaren Folie (ebenfalls nicht gezeigt). Fig. 1 shows an isometric front view of a packaging machine 10 according to the invention for packaging packaging goods (not shown) by means of a stretchable film (likewise not shown).

Die Verpackungsmaschine verfügt über eine Folientransportvorrichtung 11 zur Folienzuführung zu einem zu verpackenden Verpackungsgut. Eine erste Riemenfördereinrichtung 12a und eine zweite Riemenfördereinrichtung 12b zum Transport der Folie bilden Bestandteile der Folientransportvorrichtung 11. Die erste und die zweite Riemenfördereinrichtung 12a, 12b haben jeweils einen ersten und einen zweiten Transportriemen 13a, 13b (siehe Fig. 2). Die Transportriemen 13a, 13b sind in einer durch die Folientransportvorrichtung 11 vorgegebenen Folientransportrichtung X (in der Fig. 1 in die Papierebene hinein, dargestellt durch ein Kreuz) synchron angetrieben und nebeneinander angeordnet. Die zweite Riemenfördereinrichtung 12b ist in einer Richtung Y senkrecht zu der Folientransportrichtung X durch Spindeln 14a, 14b und einen Spindelmotor 15 bewegbar. Mit einem in vertikaler Richtung Z bewegbaren Folienführungselement 16 der Verpackungsmaschine 10 ist die Folie aus einer Folienspendeeinrichtung 17 in die Folientransportvorrichtung 11 einführbar. Der Begriff "vertikal" bezieht sich insbesondere auf die Richtung parallel zur Schwerkraft. Die Folienspendeneinrichtung 17 ist unterhalb des Folienführungselements 16 und die Folientransportvorrichtung 11 oberhalb des Folienführungselements 16 ausgebildet. Das Folienführungselement 16 verfügt über eine erste Führungsplatte 18a und eine zweite Führungsplatte 18b (siehe Fig. 2). Die Führungsplatten 18a, 18b sind vertikal ausgerichtet. Über eine Umlenkrolle 19 des Folienführungselements 16 am unteren Ende des Folienführungselements 16 ist die Folie zwischen die Führungsplatten 18a, 18b einführbar.The packaging machine has a film transport device 11 for feeding the film to a product to be packaged. A first belt conveyor 12a and a second belt conveyor 12b for transporting the film form components of the film transport device 11. The first and the second belt conveyor 12a, 12b each have a first and a second transport belt 13a, 13b (see Fig. 2 ). The transport belts 13a, 13b are in a film transport direction X (in which the film transport device 11 predetermined) Fig. 1 into the paper plane, represented by a cross) synchronously driven and arranged side by side. The second belt conveyor 12b can be moved in a direction Y perpendicular to the film transport direction X by spindles 14a, 14b and a spindle motor 15 . With a film guide element 16 of the packaging machine 10 which can be moved in the vertical direction Z , the film can be introduced from a film dispensing device 17 into the film transport device 11. The term "vertical" particularly refers to the direction parallel to gravity. The film dispenser 17 is formed below the film guide element 16 and the film transport device 11 above the film guide element 16. The film guide element 16 has a first guide plate 18a and a second guide plate 18b (see Fig. 2 ). The guide plates 18a, 18b are aligned vertically. The film can be inserted between the guide plates 18a, 18b via a deflection roller 19 of the film guide element 16 at the lower end of the film guide element 16.

In einer in vertikaler Richtung Z den Riemenfördereinrichtungen 12a, 12b zugewandten, oberen Kante 20 der Führungsplatte 18a sind eine erste Ausnehmung 21a sowie eine zweite, dritte und vierte Ausnehmung 21b, 21c, 21d ausgebildet. Das Folienführungselement 16 ist in vertikaler Richtung Z bewegbar. Dadurch ist die Führungsplatte 18a auf Höhe der Riemenfördereinrichtungen bewegbar. Dabei umgreift die Umrandung 22a der ersten Ausnehmung die erste Riemenfördereinrichtung 12a. Je nach Position der bewegbaren zweiten Riemenfördereinrichtung 12b umgreifen die Umrandungen 22b, 22c, 22d der zweiten, dritten oder vierten Ausnehmung 21b, 21c, 21d die zweite Riemenfördereinrichtung 12b. Dadurch werden die Riemenfördereinrichtungen 12a, 12b in die Ausnehmungen 21a - 21d eingeführt. Die Auswahl zwischen der zweiten, dritten oder vierten Ausnehmung 21b - 21d erfolgt dabei so, dass der Abstand 23 der Riemenfördereinrichtungen 12a, 12b in den Ausnehmungen 21a - 21d der Breite der Folie entspricht. Dies definiert die Nullpositionen der Riemenfördereinrichtungen bezüglich der Breite der Folie. Wenn die zweite Ausnehmung 21b die zweite Riemenfördereinrichtung 12b umgreift, wird dies im Rahmen der Anmeldung als "erste Nullposition" bezeichnet. Wenn die dritte Ausnehmung 21c die zweite Riemenfördereinrichtung 12b umgreift, wird dies im Rahmen der Anmeldung als "zweite Nullposition" bezeichnet. Entsprechend kann von einer "dritten Nullposition" gesprochen werden, wenn die vierte Ausnehmung 21d die zweite Riemenfördereinrichtung 12b umgreift. Weitere Ausnehmungen (in der Zeichnung nicht eigens dargestellt) können in entsprechender Weise weitere Nullpositionen festlegen.A first recess 21a and a second, third and fourth recess 21b, 21c, 21d are formed in an upper edge 20 of the guide plate 18a facing the belt conveying devices 12a, 12b in the vertical direction Z. The film guide element 16 can be moved in the vertical direction Z. As a result, the guide plate 18a can be moved at the level of the belt conveyors. The border 22a of the first recess surrounds the first belt conveyor 12a. Depending on the position of the movable second belt conveyor 12b, the borders 22b, 22c, 22d of the second, third or fourth recess 21b, 21c, 21d encompass the second belt conveyor 12b. As a result, the belt conveyors 12a, 12b are inserted into the recesses 21a-21d. The choice between the second, third or fourth recess 21b-21d is made in such a way that the distance 23 of the belt conveying devices 12a, 12b in the recesses 21a-21d corresponds to the width of the film. This defines the zero positions of the belt conveyors with respect to the width of the film. If the second recess 21b surrounds the second belt conveyor 12b, this is referred to as "first zero position" in the context of the application. If the third recess 21c engages around the second belt conveyor 12b, this is referred to as "second zero position" in the context of the application. Accordingly, one can speak of a "third zero position" when the fourth recess 21d engages around the second belt conveyor 12b. Further recesses (not specifically shown in the drawing) can define further zero positions in a corresponding manner.

In vertikaler Richtung unterhalb der Riemenfördereinrichtungen ist eine Folienschneideinrichtung 25 angeordnet. Die Folie wird durch die Riemenfördereinrichtungen 12a, 12b transportiert, bis die Folie eine ausreichende Länge gemessen ab der Folienschneideinrichtung 25 für den gewünschten Verpackungsvorgang hat. Dann wird das Folienführungselement 16 mit den Führungsplatten 18a, 18b in vertikaler Richtung nach unten, auf die Folienspendeeinrichtung 17 zu bewegt. Die Führungsplatte 18a, 18b des Folienführungselements 16 verlassen somit die Folienschneideinrichtung 25. Die Folienschneideinrichtung 25 schneidet dann durch die Folie hindurch. Die abgeschnittene Folie wird dann durch die Riemenfördereinrichtungen 12a, 12b weiter transportiert, bis der abgeschnittene Teil der Folie in einer Position vertikal oberhalb eines Hubtisches (nicht gezeigt) angeordnet ist. Der Hubtisch wird später das Verpackungsgut in vertikaler Richtung bewegen. Somit ist der abgeschnittene Teil der Folie vertikal über dem Verpackungsgut zwischen den Riemenfördereinrichtungen 12a, 12b angeordnet. Die Folie wird durch eine Bewegung der Riemenfördereinrichtung 12b in der Richtung Y senkrecht zu der Folientransportrichtung X gedehnt. Ein Verpackungsgut, zum Beispiel eine Trayschale, kann durch eine Verpackungsguttransportvorrichtung (nicht gezeigt) an die Folie zwischen den Transportriemen 13a, 13b herangeführt werden. Eine solche Verpackungsguttransportvorrichtung kann ein Zuführförderband und einen Hubtisch umfassen, wie in der oben zitierten EP 3 093 244 B1 dargestellt. Bei dem Heranführen des Verpackungsguts an die Folie durch einen Hubvorgang legt sich die Folie um das Verpackungsgut. Durch Faltzangen (nicht gezeigt) kann die Folie um das Verpackungsgut herumgeschlagen werden. Anschließend kann das Verpackungsgut durch einen Pusher (nicht gezeigt) auf eine Siegelplatte geschoben werden, auf der die Folie verschweißt wird, und schließlich durch ein Förderband abtransportiert werden, wie in der EP 3 093 244 B1 angeführt.A film cutting device 25 is arranged in the vertical direction below the belt conveying devices. The film is transported by the belt conveyor devices 12a, 12b until the film has a sufficient length measured from the film cutting device 25 for the desired packaging process. Then the film guide element 16 with the guide plates 18a, 18b in the vertical direction downward toward the film dispenser 17 emotional. The guide plate 18a, 18b of the film guide element 16 thus leave the film cutting device 25. The film cutting device 25 then cuts through the film. The cut film is then transported through the belt conveyors 12a, 12b until the cut part of the film is positioned vertically above a lift table (not shown). The lift table will later move the packaged goods in the vertical direction. The cut-off part of the film is thus arranged vertically above the packaged goods between the belt conveyors 12a, 12b. The film is stretched by moving the belt conveyor 12b in the Y direction perpendicular to the film transport direction X. A product to be packaged, for example a tray, can be brought to the film between the transport belts 13a, 13b by means of a product to be transported (not shown). Such a packaging material transport device can comprise a feed conveyor belt and a lifting table, as in that cited above EP 3 093 244 B1 shown. When the packaging material is brought up to the film by a lifting process, the film wraps around the packaging material. Folding tongs (not shown) allow the film to be wrapped around the packaged goods. The packaged goods can then be pushed by a pusher (not shown) onto a sealing plate, on which the film is welded, and finally transported away by a conveyor belt, as in FIG EP 3 093 244 B1 cited.

Die Fig. 2 zeigt eine isometrische Vorderansicht eines Ausschnitts der Verpackungsmaschine 10 mit den Riemenfördereinrichtungen 12a, 12b und des Folienführungselements 16 von schräg oben. Zur besseren Übersicht ist in Fig. 2 die Folienschneideinrichtung 25 nicht gezeigt. Insbesondere sind die erste und zweite Führungsplatte 18a, 18b des Folienführungselements 16 dargestellt, zwischen denen die Folie transportiert wird. Die Riemenfördereinrichtungen 12a, 12b haben Ausnehmungen 26 für die obere Kante 20 der Führungsplatten 18a, 18b. Im in die Ausnehmungen 21a - 21d eingeführten Zustand der Riemenfördereinrichtungen 12a, 12b umgreifen die Umrandungen 22a - 22d der Ausnehmungen 21a- 21d die Riemenförderungen 12a, 12b. Die Transportriemen 13a, 13b werden jeweils durch eine endseitig in den Transportriemen 13a, 13b angeordnete Umlenkrolle 27a, 27b geführt. Den Umlenkrollen 27a, 27b sind in Folientransportrichtung X eine erste, zweite, dritte, vierte, fünfte und sechste Führungsrolle 28a, 28b, 28c, 28d, 28e, 28f zur Führung der Transportriemen 13a, 13b nachgelagert.The Fig. 2 shows an isometric front view of a section of the packaging machine 10 with the belt conveyors 12a, 12b and the film guide element 16 from obliquely above. For a better overview is in Fig. 2 the film cutting device 25 is not shown. In particular, the first and second guide plates 18a, 18b of the Shown film guide element 16, between which the film is transported. The belt conveyors 12a, 12b have recesses 26 for the upper edge 20 of the guide plates 18a, 18b. When the belt conveying devices 12a, 12b are inserted into the recesses 21a-21d, the borders 22a-22d of the recesses 21a-21d encompass the belt conveyors 12a, 12b. The transport belts 13a, 13b are each guided by a deflection roller 27a, 27b arranged at the end in the transport belts 13a, 13b. The deflection rollers 27a, 27b are followed by a first, second, third, fourth, fifth and sixth guide roller 28a, 28b, 28c, 28d, 28e, 28f for guiding the transport belts 13a, 13b in the film transport direction X.

Die Fig. 3 zeigt eine Seitenansicht eines Endes 31 der Riemenfördereinrichtung 12b mit den Umlenkrollen 27a, 27b und den Führungsrollen 28a - 28f. Die erste Führungsrolle 28a führt das von dem zweiten Transportriemen 13b abgewandte Trum 29a des ersten Transportriemens 13a unter Ausbildung einer Biegung 30a, die das von dem zweiten Transportriemen 13b abgewandte Trum 29a aus einer im Wesentlichen vertikalen Ausrichtung Z in eine horizontale Ausrichtung H überführt. Die zweite und dritte Führungsrolle 28b, 28c führen das dem zweiten Transportriemen 13b zugewandte Trum 29b des ersten Transportriemens 13a. Die vierte und fünfte Führungsrolle 28d, 28e führen das dem ersten Transportriemen 13a zugewandte Trum 29c des zweiten Transportriemens 13b unter Ausbildung jeweils einer Biegung 30b, 30c, wobei durch diese Biegungen 30b, 30c eine Überführung des dem ersten Transportriemen 13a zugewandten Trums 29c von einer im Wesentlichen vertikalen Ausrichtung Z in eine horizontale Ausrichtung H bewirkt wird. Die sechste Führungsrolle 28f führt das von dem ersten Transportriemen 13a abgewandte Trum 29d des zweiten Transportriemens 13b unter Ausbildung einer Biegung 30d, wobei die Biegung 30d das von dem ersten Transportriemen 13a abgewandte Trum 29d von einer im Wesentlichen vertikalen Ausrichtung Z in eine horizontale Ausrichtung H überführt.The Fig. 3 shows a side view of an end 31 of the belt conveyor 12b with the deflection rollers 27a, 27b and the guide rollers 28a-28f. The first guide roller 28a guides the run 29a of the first transport belt 13a facing away from the second transport belt 13b, forming a bend 30a which transfers the run 29a facing away from the second transport belt 13b from a substantially vertical orientation Z to a horizontal orientation H. The second and third guide rollers 28b, 28c guide the run 29b of the first transport belt 13a facing the second transport belt 13b. The fourth and fifth guide rollers 28d, 28e guide the run 29c of the second transport belt 13b facing the first transport belt 13a, each forming a bend 30b, 30c, with these bends 30b, 30c transferring the run 29c facing the first transport belt 13a from one in Essentially vertical alignment Z is brought about in a horizontal alignment H. The sixth guide roller 28f guides the run 29d of the second transport belt facing away from the first transport belt 13a 13b with the formation of a bend 30d, the bend 30d converting the strand 29d facing away from the first transport belt 13a from a substantially vertical orientation Z into a horizontal orientation H.

Insbesondere ist gezeigt, dass die Transportriemen 13a, 13b aneinander anliegen. Dadurch übertragen sich die Biegungen 30b, 30c des dem ersten Transportriemen 13a zugewandten Trums 29c des zweiten Transportriemens 13b auf das dem zweiten Transportriemen 13b zugewandte Trum 29b des ersten Transportriemens 13a. Die Folie kann zum Transport zwischen die beiden aneinander anliegenden Transportriemen 13a, 13b eingeführt werden.In particular, it is shown that the transport belts 13a, 13b abut one another. As a result, the bends 30b, 30c of the run 29c of the second transport belt 13b facing the first transport belt 13a are transferred to the run 29b of the first transport belt 13a facing the second transport belt 13b. The film can be inserted between the two abutting transport belts 13a, 13b for transport.

Durch eine Spindelmutter 32 der Riemenfördereinrichtung 12b lässt sich über eine Spindel 14a, 14b (s. Fig. 1) zur Einstellung des Abstandes der Riemenfördereinrichtungen 12a, 12b die Riemenfördereinrichtung 12b in der Richtung Y senkrecht zur Folientransportrichtung X (s. Fig. 1) führen. Die Riemenfördereinrichtung 12a bleibt dabei in y Richtung fest. Somit kann der Abstand zwischen beiden Riemenfördereinrichtungen 12a, 12b verändert werden.By means of a spindle nut 32 of the belt conveyor device 12b, a spindle 14a, 14b (see FIG. Fig. 1 ) to adjust the distance between the belt conveyors 12a, 12b, the belt conveyor 12b in the direction Y perpendicular to the film transport direction X (see. Fig. 1 ) to lead. The belt conveyor 12a remains fixed in the y direction. The distance between the two belt conveyors 12a, 12b can thus be changed.

Die Fig. 4 zeigt eine isometrische Ansicht eines Teils der Verpackungsmaschine 10 mit einer Riemenfördereinrichtung 12b und dem Folienführungselement 16. Das Folienführungselement 16 hat einen ersten Motor 33a und ein erstes Zahnradgetriebe 34a mit einem Zahnrad 35a zur Bewegung des Folienführungselements 16. Die Spindeln 14a, 14b zur seitlichen Bewegung der Riemenfördereinrichtung 12b werden durch den Spindelmotor 15 mit einem zweiten Zahnradgetriebe 34b gedreht. Dargestellt ist auch ein zweiter Motor 33b zum Antrieb der Riemenfördereinrichtung 12b.The Fig. 4 shows an isometric view of a part of the packaging machine 10 with a belt conveyor 12b and the film guide element 16. The film guide element 16 has a first motor 33a and a first gear transmission 34a with a gear 35a for moving the film guide element 16. The spindles 14a, 14b for the lateral movement of the Belt conveyor 12b are driven by the spindle motor 15 with a second gear transmission 34b rotated. Also shown is a second motor 33b for driving the belt conveyor 12b.

Die Fig. 5 zeigt eine isometrische Rückansicht des Folienführungselements 16 und der Folienschneideinrichtung 25. Die Bewegung des Folienführungselements 16 wird durch das erste Zahnradgetriebe 34a mit Zahnrädern 35a, 35b und dem ersten Motor 33a geführt. Über eine Umlenkrolle 19 des Folienführungselements 16 und eine hintere Führungsrolle 36 wird die Folie aus der Folienspendeeinrichtung 17 (siehe Fig. 1) zwischen den Führungsplatten 18a, 18b (in Fig. 5: Führungsplatte 18b) geführt. Die Folienschneideinrichtung 25 hat einen Hubmagnet 33c zum Antrieb der Bewegung des Messers (nicht gezeigt) der Folienschneideinrichtung 25 zum Durchschneiden der Folie.The Fig. 5 shows an isometric rear view of the film guide element 16 and the film cutting device 25. The movement of the film guide element 16 is guided by the first gear transmission 34a with gears 35a, 35b and the first motor 33a. Via a deflection roller 19 of the film guide element 16 and a rear guide roller 36 , the film from the film dispenser 17 (see Fig. 1 ) between the guide plates 18a, 18b (in Fig. 5 : Guide plate 18b) guided. The film cutting device 25 has a lifting magnet 33c for driving the movement of the knife (not shown) of the film cutting device 25 for cutting through the film.

Die Fig. 6 zeigt eine isometrische Ansicht der Riemenfördereinrichtungen 12a, 12b und des Folienführungselement 16 mit den Führungsplatten 18a, 18b in geöffnetem Zustand. Die erste Führungsplatte 18a ist aufgeklappt. Dadurch kann eine Folie in das Folienführungselement 16 zwischen die beiden Folienplatte 18a, 18b eingelegt werden. Nach dem Einlegen der Folie kann die Führungsplatte 18a wieder zugeklappt und damit das Folienführungselement 16 geschlossen werden.The Fig. 6 shows an isometric view of the belt conveyors 12a, 12b and the film guide element 16 with the guide plates 18a, 18b in the open state. The first guide plate 18a is opened. As a result, a film can be inserted into the film guide element 16 between the two film plates 18a, 18b. After inserting the film, the guide plate 18a can be closed again and the film guide element 16 can thus be closed.

Die Fig. 7 zeigt eine isometrische Vorderansicht des Folienführungselements 16 und der unteren Seite der Riemenfördereinrichtungen 12a, 12b, wobei das Folienführungselement 16 in seine oberste Position verfahren ist. Die Riemenfördereinrichtungen 12a, 12b befinden sich in der ersten Nullposition. Die erste Riemenfördereinrichtung 12a ist in die erste Ausnehmung 21a und die zweite Riemenfördereinrichtung 12b ist in die zweite Ausnehmung 21b eingeführt. Die Folie in dem Folienführungselement 16 wird in die Riemenfördereinrichtungen 12a, 12b eingeführt und dadurch an die Folientransportvorrichtung 11 übergeben.The Fig. 7 shows an isometric front view of the film guide element 16 and the lower side of the belt conveyors 12a, 12b, the film guide element 16 being moved into its uppermost position. The belt conveyors 12a, 12b are in the first zero position. The first belt conveyor 12a is inserted into the first recess 21a and the second belt conveyor 12b is inserted into the second recess 21b. The film in the film guide element 16 is inserted into the belt conveyors 12a, 12b and thereby transferred to the film transport device 11.

Die Fig. 8 zeigt einen Längsschnitt der Führungsplatte 18a des Folienführungselements 16 (s. Fig. 1) in einer zweiten Ausführungsform. Die Führungsplatte 18a hat ein verschiebbares Ausnehmungselement 37, in dem die zweite Ausnehmung 21b ausgebildet ist. Die Höhe h1 des Ausnehmungselements 37 in vertikaler Richtung Z ist größer als die Höhe h2 der ersten Ausnehmung 21a. Dabei fluchten die obere Kante 20 der Führungsplatte 18a und die obere Kante 38 des Ausnehmungselements 37. Die Höhe h3 der zweiten Ausnehmung 21b ist gleich wie die Höhe h2 der ersten Ausnehmung 21b. Dann lassen sich die erste und zweite Riemenfördereinrichtung 12a, 12b (s. Fig. 1) durch Verschiebung der Führungsplatte 18a mit dem beweglichen Folienführungselement 16 (siehe Fig. 1) in die erste und zweite Ausnehmung 21a, 21b einführen, nachdem das zweite Ausnehmungselement 37 an eine geeignete Stelle zur Festlegung der Nullposition verschoben wurde. Das zweite Ausnehmungselement 37 kann hierzu in einer Rastvorrichtung 39 mit verschiedenen Einraststellen 40 längs der oberen Kante der Führungsplatte verrastbar sein, deren Abstände zur ersten Ausnehmung den handelsüblichen Breiten von Verpackungsfolien entsprechen. Die in Fig. 6 nicht gezeigte zweite Führungsplatte 12b ist entsprechend gestaltet.The Fig. 8 shows a longitudinal section of the guide plate 18a of the film guide element 16 (s. Fig. 1 ) in a second embodiment. The guide plate 18a has a displaceable recess element 37 in which the second recess 21b is formed. The height h 1 of the recess element 37 in the vertical direction Z is greater than the height h 2 of the first recess 21a. The upper edge 20 of the guide plate 18a and the upper edge 38 of the recess element 37 are aligned. The height h 3 of the second recess 21b is the same as the height h 2 of the first recess 21b. Then the first and second belt conveyors 12a, 12b (see FIG. Fig. 1 ) by moving the guide plate 18a with the movable film guide element 16 (see Fig. 1 ) into the first and second recesses 21a, 21b after the second recess element 37 has been moved to a suitable location for determining the zero position. For this purpose, the second recess element 37 can be latched in a latching device 39 with different latching points 40 along the upper edge of the guide plate, the distances of which from the first recess correspond to the commercial widths of packaging films. In the Fig. 6 Second guide plate 12b, not shown, is designed accordingly.

BezugszeichenlisteReference list

1010th
VerpackungsmaschinePackaging machine
1111
FolientransportvorrichtungFoil transport device
12a12a
erste Riemenfördereinrichtungfirst belt conveyor
12b12b
zweite Riemenfördereinrichtungsecond belt conveyor
13a13a
erster Transportriemenfirst conveyor belt
13b13b
zweiter Transportriemensecond conveyor belt
14a,b14a, b
SpindelnSpindles
1515
SpindelmotorSpindle motor
1616
FolienführungselementFoil guide element
1717th
FolienspendeeinrichtungFoil dispenser
18a18a
erste Führungsplattefirst guide plate
18b18b
zweite Führungsplattesecond guide plate
1919th
UmlenkrollePulley
2020
obere Kante der ersten Führungsplatteupper edge of the first guide plate
21a21a
erste Ausnehmungfirst recess
21b21b
zweite Ausnehmungsecond recess
21c,d21c, d
dritte und vierte Ausnehmungthird and fourth recess
22a-d22a-d
UmrandungenBorders
2323
Abstand der Riemenfördereinrichtungen in den AusnehmungenDistance of the belt conveyor in the recesses
2525th
FolienschneideinrichtungFoil cutting device
2626
Ausnehmungen der RiemenfördereinrichtungenRecesses in the belt conveyor
27a,b27a, b
UmlenkrollenPulleys
28a-f28a-f
FührungsrollenLeadership roles
29a-d29a-d
TrumeDreams
30a-d30a-d
BiegungenBends
3131
Ende der ersten der RiemenfördereinrichtungEnd of the first of the belt conveyor
3232
SpindelmutterSpindle nut
33a33a
Motorengine
33c33c
HubmagnetSolenoid
34a,b34a, b
ZahnradgetriebeGear transmission
35a,b35a, b
ZahnräderGears
3636
hintere Führungsrollerear leader
3737
verschiebbares Ausnehmungselementsliding recess element
3838
Oberkante des AusnehmungselementsTop edge of the recess element
3939
RastvorrichtungLocking device
4040
EinraststellenLocking points
XX
horizontale Folientransportrichtunghorizontal film transport direction
YY
horizontale Richtung senkrecht zu Xhorizontal direction perpendicular to X
ZZ.
vertikale Richtung senkrecht zu X und Yvertical direction perpendicular to X and Y
h1 h 1
Höhe des AusnehmungselementsHeight of the recess element
h2 h 2
Höhe der ersten AusnehmungHeight of the first recess
h3 h 3
Höhe der zweiten AusnehmungHeight of the second recess

Claims (15)

  1. Packaging machine (10) for packaging packaged goods by means of a stretchable film, comprising a film transport device (11) for feeding film to a packaged good to be packaged, which device has a first and a second belt conveyor apparatus (12a, 12b) for transporting the film, the belt conveyor apparatuses (12a, 12b) each comprising a first and a second transport belt (13a, 13b) which are driven synchronously in a film transport direction (X) which is predetermined by the film transport device (11) and are arranged alongside one another, it being possible for at least the second belt conveyor apparatus (12b) to move in a direction (Y) perpendicular to the film transport direction (X), and comprising a movable film guide element (16) by means of which the film can be inserted into the film transport device (11), the film guide element (16) comprising a guide plate (18a, 18b) for guiding the film, which plate has a first recess (21a) and a second recess (21b) in an upper edge (20), in the vertical direction (Z), which faces the belt conveyor apparatuses (12a, 12b), it being possible for the first belt conveyor apparatus (12a) to be inserted into the first recess (21a) and the second belt conveyor apparatus (12b) to be inserted into the second recess (21b), as a result of which a first zero position with respect to the width of the film is established, characterized in that the guide plate (18a) of the film guide element (16) is vertically oriented, and in that the guide plate (18a, 18b) has at least a third recess (21c) along the edge (20) thereof facing the belt conveyor apparatuses (12a, 12b), it being possible for the second belt conveyor apparatus (12b) to be inserted into the third recess (21c) instead of the second recess (21b) in order to establish a second zero position with respect to the width of the film, or in that at least the second recess (21b) of the guide plate (18a, 18b) is formed in a recess element (37) which can be displaced on the upper edge (20) of the guide plate (18a, 18b) in order to establish the second zero position with respect to the width of the film.
  2. Packaging machine according to claim 1, characterized in that, in addition to the first recess (21a), the guide plate (18a, 18b) has more than two further recesses (21b, 21c), in particular three further recesses (21b, 21c, 21d), into which the second belt conveyor apparatus (12b) can be inserted in order to establish more than two zero positions.
  3. Packaging machine according to either of the preceding claims, characterized in that the distances between the first recess (21a) and the further recesses (21b, 21c, 21d) correspond to commercially available widths of packaging films made of plastics material.
  4. Packaging machine according to any of the preceding claims, characterized in that the height (h1) of the displaceable recess element (37) in the vertical direction (Z) is greater than or equal to the height (h2) of the first recess (21a), the upper edge (20) of the guide plate (18a) being flush with the upper edge (38) of the recess element (37) and the height (h3) of the second recess (21b) in the recess element (37) being equal to the height (h2) of the first recess (21a).
  5. Packaging machine according to any of the preceding claims, characterized in that the displaceable recess element (37) can be locked in a locking device (39).
  6. Packaging machine according to claim 5, characterized in that the locking device (39) has different engagement points (40) along the upper edge (20) of the guide plate (18a), the distances of which points from the first recess (21a) correspond in particular to commercially available widths of packaging films made of plastics material.
  7. Packaging machine according to any of the preceding claims, characterized in that there is a further guide plate (18b) which extends so as to be horizontally spaced apart from and in parallel with the first guide plate (18a), and which has identical recesses (21a-21d) to the first guide plate (18a), it being possible to transport the film in the gap between the two guide plates (18a, 18b).
  8. Packaging machine according to any of the preceding claims, characterized in that the packaging machine (10) has deflection rollers (27a, 27b) which each guide one of the transport belts (13a, 13b) in a continuously circulating manner and are arranged at the end in the relevant transport belt (13a, 13b), with guide rollers (28a -28f) being mounted in each of the transport belts (13a, 13b) downstream of the deflection rollers (27a, 27b) in order to guide the transport belts (13a, 13b) in the film transport direction (X).
  9. Packaging machine according to claim 8, characterized in that the belt conveyor apparatuses (12a, 12b) each have a first, second, third, fourth, fifth and sixth guide roller (28a - 28f), the first guide roller (28a) guiding the side (29a) of the first transport belt (13a) that faces away from the second transport belt (13b) by forming a bend (30a), the second and third guide roller (28b, 28c) guiding the side (29b) of the first transport belt (13a) that faces the second transport belt (13b), the fourth and fifth guide roller (28d, 28e) guiding the side (29c) of the second transport belt (13b) that faces the first transport belt (13a) by forming a bend (30b, 30c) in each case, and the sixth guide roller (28f) guiding the side (29d) of the second transport belt (13b) that faces away from the first transport belt (13a) by forming a bend (30d).
  10. Packaging machine according to any of the preceding claims, characterized in that after inserting the film into the film transport device (11) for feeding film to a packaged good to be packaged, the belt conveyor apparatuses (12a, 12b) can be moved away from one another at a distance (23) in the direction (Y) perpendicular to the film transport direction (X) in order to stretch the film.
  11. Packaging machine according to any of the preceding claims, characterized in that a packaged good, in particular a tray, can be conveyed between the belt conveyor apparatuses (12a, 12b) to the film by means of a packaged goods transport device.
  12. Packaging machine according to any of the preceding claims, comprising a film transport device (11), in which the two opposite transport belts (13a, 13b) of a belt conveyor apparatus (12a, 12b) have a first and a second deflection roller (27a, 27b) which each guide one of the transport belts (13a, 13b) in a continuously circulating manner and are arranged at the end in the relevant transport belt (13a, 13b), characterized in that the first deflection roller (27a) projects beyond the transport belt (13a) associated therewith with an end portion, in that the first deflection roller (27a) has a first transport ring on the end portion along the circumference thereof, in that the second deflection roller (27b) projects beyond the transport belt associated therewith with an end portion, and in that the second deflection roller has a second transport ring on the end portion along the circumference thereof, a first contact surface of the first transport ring extending along the circumference of the first deflection roller (27a) with mechanical friction, a second contact surface of the second transport ring extending along the circumference of the second deflection roller with mechanical friction, and the contact surfaces frictionally abutting one another.
  13. Method for packaging packaged goods in a packaging a machine (10) according to any of the preceding claims by means of a stretchable film, the film being inserted by means of a movable film guide element (16) into a film transport device (11) for feeding film to a packaged good to be packaged, the film being transported by the film transport device (11) in a film transport direction (X), the film being wrapped around a packaged good after the film is transported by the film transport device (11), a first belt conveyor apparatus (12a) being inserted into a first recess (21a) of a guide plate (18a) of the film guide element (16) during the insertion of the film into the film transport device (11), and a second belt conveyor apparatus (12b) being inserted into a second recess (21b) of the guide plate (18a) in order to establish a first zero position with respect to the width of the film, and it being possible for at least the second belt conveyor apparatus (12b) to move in a direction (Y) perpendicular to the film transport direction (X), characterized in that the second belt conveyor apparatus (21b) is inserted into a third recess (21c) of the guide plate (18a) instead of the second recess (21b) in order to establish a second zero position with respect to the width of the film currently being used, or in that the recess element (37) is displaced on the upper edge (20) of the guide plate (18a) in order to establish the second zero position and the second belt conveyor apparatus (12b) is inserted into the second recess (21c) on the recess element (37).
  14. Method according to claim 13, characterized in that the film guide element (16) having the guide plate (18a) is moved between a film dispenser apparatus (17) and the film transport device (11) in order to feed a film to the film transport device (11).
  15. Method according to either claim 13 or claim 14, characterized in that the film is cut to a desired film length by means of a film cutting apparatus (25) which is arranged upstream of the film transport device (11) in the film transport direction (X).
EP18179617.8A 2018-06-25 2018-06-25 Packaging machine for packaging with stretch film and optimized packaging method Active EP3587283B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18179617.8A EP3587283B1 (en) 2018-06-25 2018-06-25 Packaging machine for packaging with stretch film and optimized packaging method
US16/396,804 US10781006B2 (en) 2018-06-25 2019-04-29 Packaging machine for packaging with stretch film and optimized packaging method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18179617.8A EP3587283B1 (en) 2018-06-25 2018-06-25 Packaging machine for packaging with stretch film and optimized packaging method

Publications (2)

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EP3587283A1 EP3587283A1 (en) 2020-01-01
EP3587283B1 true EP3587283B1 (en) 2020-07-29

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EP (1) EP3587283B1 (en)

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US10781006B2 (en) 2020-09-22
EP3587283A1 (en) 2020-01-01
US20190389607A1 (en) 2019-12-26

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