EP3142952B1 - Device and method for adjusting the position of a packaging material web with respect to a reference in a packaging machine - Google Patents

Device and method for adjusting the position of a packaging material web with respect to a reference in a packaging machine Download PDF

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Publication number
EP3142952B1
EP3142952B1 EP15716767.7A EP15716767A EP3142952B1 EP 3142952 B1 EP3142952 B1 EP 3142952B1 EP 15716767 A EP15716767 A EP 15716767A EP 3142952 B1 EP3142952 B1 EP 3142952B1
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EP
European Patent Office
Prior art keywords
packaging
material web
web
packaging material
devices
Prior art date
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Active
Application number
EP15716767.7A
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German (de)
French (fr)
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EP3142952A1 (en
Inventor
Andre Philipp
He Li
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP3142952A1 publication Critical patent/EP3142952A1/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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • 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
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/18—Registering sheets, blanks, or webs
    • 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
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/02—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
    • B65B57/04—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages and operating to control, or to stop, the feed of such material, containers, or packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/032—Controlling transverse register of web
    • B65H23/0326—Controlling transverse register of web by moving the unwinding device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/032—Controlling transverse register of web
    • B65H23/038—Controlling transverse register of web by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/443—Moving, forwarding, guiding material by acting on surface of handled material
    • B65H2301/4432—Moving, forwarding, guiding material by acting on surface of handled material by means having an operating surface contacting only one face of the material, e.g. roller
    • B65H2301/44324—Rollers
    • B65H2301/443243—Rollers pivoting around an axis perpendicular to the plane of the material (especially when web is running in a U-loop)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/81—Packaging machines

Definitions

  • the invention relates to a device for adjusting the position of a packaging material web, in particular the web center of the packaging material web, to a reference in a packaging machine according to the preamble of claim 1. Furthermore, the invention relates to a method for adjusting the position of a packaging material web, preferably by means of a device according to the invention and a packaging machine in the form of a tubular bag machine with a device according to the invention.
  • a device is known from DE 10 2011 003 666 A1 known.
  • the device arranged in the feed region of a packaging material web in the region of a tubular bag machine comprises a device which aligns the packaging material web with the forming tube of the tubular bag machine by displacing the packaging web in a direction extending transversely to the transport direction of the packaging material web.
  • a device for adjusting the web center of a packaging material web in which the device has a plurality of deflection or transport rollers around which the packaging material web is guided.
  • rollers are arranged on a pivoting frame which is pivotable about an axis arranged perpendicular to the transport direction of the packaging material web and thereby influences the direction of the conveyed packaging material web.
  • a pivoting frame which is pivotable about an axis arranged perpendicular to the transport direction of the packaging material web and thereby influences the direction of the conveyed packaging material web.
  • the devices known from the prior art have in common that they have only a single device for influencing the position of the packaging material web or its web center. This has the consequence that, ever according to the tolerance layer of the conveyed packaging material web and other circumstances, the packaging material web in the region of the (single) device in its conveying direction must be changed relatively strong, in particular to align the web center of the packaging material web with a reference point of the packaging machine. This means a relatively high mechanical load on the material of the packaging material web, which can be critical especially for relatively thin packaging materials, so that there is a risk of tearing the packaging material web.
  • the invention has the object, a device for adjusting the position of a packaging material web, in particular the web center of the packaging material web to form a reference in a packaging machine according to the preamble of claim 1 such that at relatively low mechanical stress the material of the packaging material web the greatest possible influence on the position or the web center of the packaging material web is made possible to a reference of a packaging machine.
  • critical packaging materials should also be relatively easy to handle on a packaging machine with regard to influencing the web center.
  • the two devices each have a central position and two end positions, and when the control device in approaching the first or second device to an end position the other device such controls that the former device can be moved back towards its middle position , This avoids, in particular, that should one of the devices already be in the region of their end position, a further additional adjustment in the direction of the end position is not possible, or can only be done to a certain extent. It is, so to speak, a self-aligning system.
  • the first device is part of a carrier device in which the packaging material web is stored in the form of a packaging material roll.
  • the design of the first device is therefore relatively simple in terms of device technology, since the already conventionally provided carrier device for storing the packaging material web only has to be designed to be displaceable in a direction transverse to the transport direction of the packaging material web in order to form the first device.
  • such a design of the first device allows relatively large tolerances with regard to the positioning of the packaging material roll on the carrier device, since the desired position of the packaging material web on the carrier device can be set by the first device within a wide range.
  • the second device comprises a pivotable about an axis rotary frame, and that a first distance between the two devices is greater than a second distance between the second device and a forming device of the packaging machine, in the region of the reference is arranged ,
  • a first distance between the two devices is greater than a second distance between the second device and a forming device of the packaging machine, in the region of the reference is arranged ,
  • a slight deviation of the web center is achieved for reference at the critical point of the packaging machine, since between the second device and the reference only a small conveying distance for the Packing material web is provided.
  • a particularly preferred embodiment of the invention provides that a device for measuring web tension acting in the transverse direction of the packaging material web is provided between the two devices, and that a control device controls the two devices as a function of the detected web tension of the packaging material web.
  • a control device controls the two devices as a function of the detected web tension of the packaging material web.
  • a sensor system for detecting the position of the packaging material web is arranged between the second device and the forming device of the packaging machine.
  • the control device of the packaging machine then controls the two devices as a function of the detected position of the packaging material web.
  • the invention also includes a packaging machine in the form of a tubular bag machine with a device according to the invention for adjusting the position, in particular the web center of the packaging material web, to a reference.
  • the invention comprises a method for adjusting the position, in particular the web center of a packaging material web, to a reference in a packaging machine, preferably using a device according to the invention, in which two, in the transport direction of the packaging material spaced separate means for influencing the position of the packaging material web are provided , as well as a control device for Control of the two devices, which controls the two devices to achieve a desired position in response to a detected actual position of the packaging material web.
  • the activation of the two devices takes place as a function of a web tension in the packaging material web detected between the two devices.
  • a packaging machine in the form of a tubular bag machine 100 is shown.
  • a forming and filling tube 101 which is surrounded by a forming shoulder 102, can be seen.
  • the forming shoulder 102 serves to form a packaging material tube from a packaging material web 1.
  • the packaging material web 1 is, in particular, a heat-sealable packaging material web 1 consisting of plastic material, but it is also conceivable, for example, with a glue layer coated paper webs 1 consisting of paper. It is essential that the web center 2 of the packaging material web 1 must be aligned with the forming shoulder 102 for the correct shaping of the packaging material hose, from which filled bag packages are produced. In the illustrated embodiment, it is assumed that the web center 2 of the packaging material web 1 must be aligned centrally with respect to the forming shoulder 102 or to the forming and filling tube 101, which is represented by the reference line 103.
  • the packaging material web 1 is stored in the form of a packaging material roll and mounted rotatably on a carrier device 15 in a horizontal direction.
  • a transport of the packaging material web 1 in the direction of the forming shoulder 102 allows or facilitates.
  • the tubular bag machine 100 is equipped with a device 10, which makes it possible to position the web center 2 of the packaging material web 1 to the reference line 103 or align.
  • the device 10 comprises a first device 21, which is realized by the carrier device 15.
  • the first device 21 has an adjusting drive, not shown, which makes it possible for the carrier device 15, and thus also for the carrier device 15, to be realized stockpiled packaging material web 1 to move in the direction of the double arrow 22 in a direction perpendicular to the transport direction 23 of the packaging material web 1 direction.
  • the first device 21 comprises at least a first sensor 24, which detects, for example, a web edge 3, 3 'of the packaging material web 1, from which a control device 50 in knowledge of the width of the packaging material web 1 on the exact position of the packaging material web 1 and der Brumitte. 2 , 2 'in the region of the support means 15 closes.
  • the device 10 comprises at a distance A 1 to the first device 21, a second device 26, which has a rotating frame 27 with conveying or deflection rollers, which serves to convey the packaging material web 1. It is essential that the rotating frame 27 about an axis 28 which is perpendicular to the plane of the Fig. 1 runs, is pivotally mounted in the direction of the double arrow 29.
  • the second device 26 is also coupled to the control device 50 in order on the one hand to supply the control device 50 with the position of the second device 26 or its angular position as an input value, and on the other hand by the control device 50 to drive the rotary frame 27 in the axis 28 Position in a desired position.
  • the web center 2 of the packaging material web 1 can be influenced in relation to the reference line 103 of the forming shoulder 102.
  • the second device 26 is located at a distance A 2 to the forming shoulder 102, which in contrast to the representation of Fig. 1 and 2 is significantly less than the distance A 1 between the two devices 21, 26th
  • a sensor system 30 with web edge sensors 31, 32 is provided between the second device 26 and the forming shoulder 102, the signals of which are also supplied to the control device 50 as input values.
  • a deflection roller 33 which feeds the packaging material web 1 to the forming shoulder 102, is also shown by way of example.
  • the area between the first device 21 and the forming shoulder 102 in addition to the transport rollers 16 to 18 and the guide roller 33 is still a plurality of further deflection or transport rollers may have, which are not shown for the sake of simplicity.
  • the transport of the packaging material web 1 from the carrier device 15 to the forming shoulder 102 can take place either continuously or clocked, or in a mixed form, wherein in a partial area between the carrier device 15 and the forming shoulder 102 a buffer area with so-called Dancer rollers is arranged, which allows a balance between a cyclic and a continuous promotion of the packaging material web 1.
  • a device 35 for detecting material properties of the packaging material web 1 is arranged in the region between the two devices 21 and 26.
  • a tension profile of the web tension of the packaging material web 1 can be determined transversely to the transport direction 23 of the packaging material web 1.
  • the device 10 described so far for adjusting the web center 2 of the packaging material web 1 to the reference line 103 of the tubular bag machine 100 can be operated in various operating modes.
  • a first mode of operation is explained, in which the solid state of the web edges 3 and 4 shows the end state of the position of the packaging material web 1 to be reached, in which the web center 2 is aligned with the reference line 103.
  • the dashed representation of the packaging material web 1 ', an initial state with web edges 3', 4 ' is shown, in which between the web center 2 in the final state and the web center 2' in the initial state, a lateral deviation a is present.
  • the position of the packaging material web 1 on the carrier device 15 is first determined by means of the at least one first sensor 24, and then (with knowledge of the width of the packaging material web 1) the adjustably arranged carrier device 15 or the first Device 21 controlled by the control device 50 such that the packaging material web 1 in the illustrated embodiment in the plane of the Fig. 1 is moved from right to left until the actual position of the packaging material web 1 coincides with the desired position, in which the web center 2 is aligned with the reference line 103. Aligning the web center 2, 2 'with the reference line 103 takes place as a function of the web speed of the packaging material web 1 and further, packaging-specific properties.
  • Fig. 3a is shown by the course of the curve X over the time t, the change of the web center 2 'to the referenced web center 2 (curve Y).
  • the course of the control signal for the first device 21 can be recognized by the curve Z.
  • the compensation of the mentioned bow error of the packaging material web 1 is basically compensated for solely by the first device 21, but is favored or accelerated by the second device 26.
  • a second mode of operation is shown, which may occur during production in an already established state of the packaging material web 1 in the already aligned state of the web center 2 to the reference line 103. Since the second device 26 is arranged at a relatively small distance A 2 to the forming shoulder 102 and to the reference line 103 on the forming shoulder 102, it can happen inter alia that the second device 26 is already pivoted so strongly about the axis 28 that this is close to the edge of their work area, which should be represented by the dashed representation of the rotating frame 27 is located. In this case, a further correction of the web center 2 is no longer possible with a deviation a detected by the sensor device 30 in said direction.
  • the second means 26 in order to avoid pauses in production, it is desirable for the second means 26 to be (re) pivoted from the dashed representation back to a middle position, from which deviations a of the web center 2 with respect to the reference line 103 are compensated in both directions by the second means 26 can be.
  • This is done by the first device 21 shifting the carrier device 15 to the right from the position shown by the dashed representation, so that the second device 26 can be swiveled back relative to its angle to the axis 28 in the direction of its middle position.
  • the operation of this second mode of operation is through the Fig. 3b clarified. It is shown that the actual position and the desired position of the web center 2 (curve X) is aligned with the reference line 103 during the entire time.
  • curve Y the control signal for the first device 21 is illustrated, which after a certain time, a return of the second device 26 allows in its center position, which is illustrated by the curve Z (control signal of the second device 26).
  • the device 10 described so far can be modified or modified in many ways, without departing from the objects of the independent claims.
  • the application of the device 10 should not be limited to tubular bag machines 100, but can also be used in other packaging machines. It can also be provided that when the first device 21 approaches one of its lateral end positions in analogy to that in connection with FIG Fig. 2 and 3b explained mode, the second device 26 is driven such that the first device 21 can be moved again in the direction of its central position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine Vorrichtung zum Einstellen der Position einer Packstoffbahn, insbesondere der Bahnmitte der Packstoffbahn, zu einer Referenz in einer Verpackungsmaschine nach dem Oberbegriff des Anspruchs 1. Ferner betrifft die Erfindung ein Verfahren zum Einstellen der Position einer Packstoffbahn, vorzugsweise mittels einer erfindungsgemäßen Vorrichtung und eine Verpackungsmaschine in Form einer Schlauchbeutelmaschine mit einer erfindungsgemäßen Vorrichtung.The invention relates to a device for adjusting the position of a packaging material web, in particular the web center of the packaging material web, to a reference in a packaging machine according to the preamble of claim 1. Furthermore, the invention relates to a method for adjusting the position of a packaging material web, preferably by means of a device according to the invention and a packaging machine in the form of a tubular bag machine with a device according to the invention.

Eine Vorrichtung nach dem Oberbegriff des Anspruchs 1 ist aus der DE 10 2011 003 666 A1 bekannt. Die im Zuführbereich einer Packstoffbahn im Bereich einer Schlauchbeutelmaschine angeordnete Vorrichtung umfasst eine Einrichtung, die die Packstoffbahn durch Verschieben der Packstoffbahn in einer quer zur Transportrichtung der Packstoffbahn verlaufenden Richtung mit dem Formrohr der Schlauchbeutelmaschine ausgerichtet. Weiterhin ist aus der DE 44 44 228 C2 eine Einrichtung zum Einstellen der Bahnmitte einer Packstoffbahn bekannt, bei der die Einrichtung mehrere Umlenk- bzw. Transportrollen aufweist, um die die Packstoffbahn geführt ist. Die Rollen sind an einem Schwenkrahmen angeordnet, der um eine senkrecht zur Transportrichtung der Packstoffbahn angeordneten Achse schwenkbar ist und dadurch die Richtung der geförderten Packstoffbahn beeinflusst. Zuletzt ist es aus der DE 10 2007 003 727 B4 bekannt, durch gezieltes Ausüben eines Drucks auf die Oberfläche einer Packstoffbahn im Bereich einer Umlenkrolle mittels einer Andrückeinrichtung die Transportrichtung der Packstoffbahn zu beeinflussen.A device according to the preamble of claim 1 is known from DE 10 2011 003 666 A1 known. The device arranged in the feed region of a packaging material web in the region of a tubular bag machine comprises a device which aligns the packaging material web with the forming tube of the tubular bag machine by displacing the packaging web in a direction extending transversely to the transport direction of the packaging material web. Furthermore, from the DE 44 44 228 C2 a device for adjusting the web center of a packaging material web, in which the device has a plurality of deflection or transport rollers around which the packaging material web is guided. The rollers are arranged on a pivoting frame which is pivotable about an axis arranged perpendicular to the transport direction of the packaging material web and thereby influences the direction of the conveyed packaging material web. Last it is from the DE 10 2007 003 727 B4 known to influence the transport direction of the packaging material web by selectively exerting pressure on the surface of a packaging material web in the region of a deflection roller by means of a pressing device.

Den aus dem Stand der Technik bekannten Vorrichtungen ist gemeinsam, dass diese lediglich eine einzige Einrichtung zur Beeinflussung der Position der Packstoffbahn bzw. deren Bahnmitte aufweisen. Dies hat zur Folge, dass, je nach Toleranzlage der zugeförderten Packstoffbahn sowie sonstigen Umständen, die Packstoffbahn im Bereich der (einzigen) Einrichtung in ihrer Förderrichtung relativ stark verändert werden muss, um insbesondere die Bahnmitte der Packstoffbahn mit einem Referenzpunkt der Verpackungsmaschine auszurichten. Dies bedeutet eine relativ hohe mechanische Belastung des Materials der Packstoffbahn, was vor allem bei relativ dünnen Verpackungsmaterialen kritisch sein kann, so dass die Gefahr des Reißens der Packstoffbahn besteht. Darüber hinaus erfordert das Vorsehen lediglich einer einzigen Einrichtung zur Beeinflussung der Richtung der Packstoffbahn eine sorgfältige Ausrichtung bzw. Anordnung der restlichen, die Position der Packstoffbahn in der Verpackungsmaschine beeinflussenden Teile bzw. Einrichtungen. Aus SORSEN S L" Basic Techniques For Controlling Web Position", Automation, Penton Publikation XX, Bd. 13, Nr. 4, 1. April 1965, Seiten 105-110, XP 000562946 werden unterschiedliche Techniken zur Veränderung einer Folienposition dargelegt. In Figur 1d wird offenbart, wie durch eine Drehung einer Rolle die Position der Folie verändert werden kann. In Figur 4a ist die Möglichkeit einer seitlichen Verstellung einer Rolle gezeigt.The devices known from the prior art have in common that they have only a single device for influencing the position of the packaging material web or its web center. This has the consequence that, ever according to the tolerance layer of the conveyed packaging material web and other circumstances, the packaging material web in the region of the (single) device in its conveying direction must be changed relatively strong, in particular to align the web center of the packaging material web with a reference point of the packaging machine. This means a relatively high mechanical load on the material of the packaging material web, which can be critical especially for relatively thin packaging materials, so that there is a risk of tearing the packaging material web. Moreover, the provision of only a single device for influencing the direction of the packaging material web requires a careful alignment or arrangement of the remaining parts or devices which influence the position of the packaging material web in the packaging machine. Out SORSEN SL "Basic Techniques For Controlling Web Position", Automation, Penton Publication XX, Vol. 13, No. 4, April 1, 1965, pages 105-110, XP 000562946 different techniques for changing a film position are presented. In Figure 1d discloses how the position of the film can be changed by a rotation of a roller. FIG. 4a shows the possibility of a lateral adjustment of a roller.

Aus der EP 309818A2 ist eine Vorrichtung zum Trennen von Materialbahnen in zwei Teilbahnen bekannt. Um ein Auseinanderlaufen der getrennten Bahnen nach dem unmittelbaren Trennen zu bewerkstelligen, sind zwei Bahnjustierorgane mit entsprechend verdrehten Rollen zueinander angeordnet. Noch vor dem Schneiden ist ein weiteres Justierorgan angeordnet.From the EP 309818A2 a device for separating material webs in two partial webs is known. To accomplish a divergence of the separate tracks after the immediate separation, two Bahnjustierorgane are arranged with correspondingly rotated rollers to each other. Even before cutting another adjustment is arranged.

Aus der DE 19516871 A1 sind eine Schlauchbeutelmaschine und ein Verfahren zum Betreiben der Schlauchbeutelmaschine bekannt. Hierbei wird der Lauf einer Folienbahn mittels einer Einrichtung zur Veränderung der Folienspannung im Bereich mindestens einer der beiden Folienkanten korrigiert. Die Korrektur erfolgt über eine Regeleinrichtung aufgrund von Messwerten einer Einrichtung zur Erfassung des genauen Folienverlaufs.From the DE 19516871 A1 are known a tubular bag machine and a method for operating the tubular bag machine. Here, the course of a film web is corrected by means of a device for changing the film tension in the region of at least one of the two film edges. The correction takes place via a control device on the basis of measured values of a device for detecting the exact course of the film.

Offenbarung der ErfindungDisclosure of the invention

Ausgehend von dem dargestellten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Vorrichtung zum Einstellen der Position einer Packstoffbahn, insbesondere der Bahnmitte der Packstoffbahn, zu einer Referenz in einer Verpackungsmaschine nach dem Oberbegriff des Anspruchs 1 derart weiterzubilden, dass bei relativ geringer mechanischer Belastung des Materials der Packstoffbahn eine möglichst große Beeinflussung der Position bzw. der Bahnmitte der Packstoffbahn zu einer Referenz einer Verpackungsmaschine ermöglicht wird. Insbesondere sollen sich auch hinsichtlich der Beeinflussung der Bahnmitte kritische Packstoffe auf einer Verpackungsmaschine relativ einfach handhaben lassen.Based on the illustrated prior art, the invention has the object, a device for adjusting the position of a packaging material web, in particular the web center of the packaging material web to form a reference in a packaging machine according to the preamble of claim 1 such that at relatively low mechanical stress the material of the packaging material web the greatest possible influence on the position or the web center of the packaging material web is made possible to a reference of a packaging machine. In particular, critical packaging materials should also be relatively easy to handle on a packaging machine with regard to influencing the web center.

Diese Aufgabe wird erfindungsgemäß bei einer Vorrichtung mit den Merkmalen des Anspruchs 1 dadurch gelöst, dass zwei Einrichtungen zum Einstellen der Position vorgesehen sind, wobei die erste Einrichtung zum linearen Verschieben der Packstoffbahn in einer senkrecht zur Transportrichtung verlaufenden Richtung und die zweite Einrichtung zum Schwenken der Packstoffbahn um eine senkrecht zur Transportrichtung der Packstoffbahn angeordnete Achse ausgebildet ist. Das Vorsehen zweier separater Einrichtungen zum Einstellen bzw. Beeinflussen insbesondere der Bahnmitte der Packstoffbahn ermöglicht es, die benötigte Richtungsänderung der Packstoffbahn im Bereich jeder einzelnen Einrichtung relativ gering zu wählen, wodurch sich eine relativ geringe mechanische Belastung auf das Material der Packstoffbahn ergibt. Darüber hinaus lassen sich während der Förderung der Packstoffbahn entlang deren Transportwegs auftretende Störfaktoren, die zu einer Abweichung der Ist-Position von einer Soll-Position insbesondere der Bahnmitte der Packstoffbahn führen, durch die üblicherweise in relativ geringem Abstand zur die Packstoffbahn weiterverarbeitenden Verpackungsmaschine angeordnete zweite Einrichtung noch korrigieren, so dass die Verpackungsmaschine die Packstoffbahn vollständig beispielsweise zur Ausbildung von Verpackungen verwenden kann. Erfindungsgemäß ist vorgesehen, wenn die beiden Einrichtungen jeweils eine Mittelstellung und zwei Endstellungen aufweisen, und wenn die Steuereinrichtung bei der Annährung der ersten oder zweiten Einrichtung an eine Endstellung die jeweils andere Einrichtung derart ansteuert, dass die erstgenannte Einrichtung wieder in Richtung ihrer Mittelstellung bewegt werden kann. Dadurch wird insbesondere vermieden, dass, sollte sich eine der Einrichtungen bereits im Bereich ihrer Endstellung befinden, eine weitere zusätzliche Verstellung in Richtung der Endstellung nicht, oder nur noch bis zu einem gewissen Maß vorgenommen werden kann. Es handelt sich damit sozusagen um ein selbstausrichtendes System.This object is achieved in a device with the features of claim 1, characterized in that two means are provided for adjusting the position, wherein the first means for linear displacement of the packaging material in a direction perpendicular to the transport direction and the second means for pivoting the packaging material web is formed about an axis arranged perpendicular to the transport direction of the packaging material axis. The provision of two separate means for adjusting or influencing in particular the web center of the packaging material web makes it possible to achieve the required change in direction of the packaging material web in the area of each individual To select device relatively low, resulting in a relatively low mechanical stress on the material of the packaging material web. In addition, during the promotion of the packaging material web occurring along their transport path disruptive factors that lead to a deviation of the actual position of a target position, in particular the web center of the packaging material, by the usually relatively short distance from the packaging material web further processing packaging machine arranged second device still correct, so that the packaging machine can use the packaging material completely, for example, to form packaging. According to the invention it is provided that the two devices each have a central position and two end positions, and when the control device in approaching the first or second device to an end position the other device such controls that the former device can be moved back towards its middle position , This avoids, in particular, that should one of the devices already be in the region of their end position, a further additional adjustment in the direction of the end position is not possible, or can only be done to a certain extent. It is, so to speak, a self-aligning system.

Vorteilhafte Weiterbildungen der erfindungsgemäßen Vorrichtung sind in den Unteransprüchen aufgeführt.Advantageous developments of the device according to the invention are listed in the subclaims.

Besonders bevorzugt ist es, wenn die erste Einrichtung Bestandteil einer Trägereinrichtung ist, in der die Packstoffbahn in Form einer Packstoffrolle bevorratet ist. Die Ausbildung der ersten Einrichtung ist daher vorrichtungstechnisch relativ einfach, da die bereits üblicherweise vorgesehene Trägereinrichtung zum Bevorraten der Packstoffbahn lediglich in einer quer zur Transportrichtung der Packstoffbahn angeordneten Richtung verschiebbar ausgebildet werden muss, um die erste Einrichtung auszubilden. Darüber hinaus ermöglicht eine derartige Ausbildung der ersten Einrichtung, hinsichtlich der Positionierung der Packstoffrolle auf der Trägereinrichtung relativ große Toleranzen zuzulassen, da die Soll-Position der Packstoffbahn auf der Trägereinrichtung durch die erste Einrichtung in einem weiten Rahmen eingestellt werden kann.It is particularly preferred if the first device is part of a carrier device in which the packaging material web is stored in the form of a packaging material roll. The design of the first device is therefore relatively simple in terms of device technology, since the already conventionally provided carrier device for storing the packaging material web only has to be designed to be displaceable in a direction transverse to the transport direction of the packaging material web in order to form the first device. In addition, such a design of the first device allows relatively large tolerances with regard to the positioning of the packaging material roll on the carrier device, since the desired position of the packaging material web on the carrier device can be set by the first device within a wide range.

Weiterhin ist es bevorzugt vorgesehen, wenn die zweite Einrichtung einen um eine Achse schwenkbaren Drehrahmen umfasst, und dass ein erster Abstand zwischen den beiden Einrichtungen größer ist als ein zweiter Abstand zwischen der zweiten Einrichtung und einer Formeinrichtung der Verpackungsmaschine, in deren Bereich die Referenz angeordnet ist. Insbesondere durch den relativ geringen zweiten Abstand zwischen der zweiten Einrichtung und der Formeinrichtung wird eine geringe Abweichung der Bahnmitte zur Referenz an der kritischen Stelle der Verpackungsmaschine erzielt, da zwischen der zweiten Einrichtung und der Referenz lediglich noch eine geringe Förderstrecke für die Packstoffbahn vorgesehen ist. Weiterhin wird es durch einen relativ großen Abstand zwischen den beiden Einrichtungen ermöglicht, dass selbst bei einer relativ kleinen Änderung der Förderrichtung der Packstoffbahn im Bereich der ersten Einrichtung aufgrund des relativ großen Abstands zur zweiten Einrichtung sich die Bahnmitte bis in den Bereich der zweiten Einrichtung relativ stark ändert, so dass die Richtung bzw. Position der Bahnmitte in der ersten Einrichtung nur relativ gering verändert werden muss.Furthermore, it is preferably provided that the second device comprises a pivotable about an axis rotary frame, and that a first distance between the two devices is greater than a second distance between the second device and a forming device of the packaging machine, in the region of the reference is arranged , In particular, due to the relatively small second distance between the second device and the molding device, a slight deviation of the web center is achieved for reference at the critical point of the packaging machine, since between the second device and the reference only a small conveying distance for the Packing material web is provided. Furthermore, it is made possible by a relatively large distance between the two devices that even with a relatively small change in the conveying direction of the packaging material web in the region of the first device due to the relatively large distance to the second device, the web center relatively strong in the area of the second device changes, so that the direction or position of the web center in the first device must be changed only relatively small.

Eine besonders bevorzugte Ausgestaltung der Erfindung sieht vor, dass zwischen den beiden Einrichtungen eine Einrichtung zur Messung von in Querrichtung der Packstoffbahn wirkenden Bahnspannungen vorgesehen ist, und dass eine Steuereinrichtung die beiden Einrichtungen in Abhängigkeit der erfassten Bahnspannungen der Packstoffbahn ansteuert. Eine derartige Ausbildung ermöglicht es insbesondere, die beiden Einrichtungen derart anzusteuern, dass ein möglichst gleichmäßiger Verlauf der Bahnspannung quer zur Förderrichtung der Packstoffbahn bzw. insgesamt gesehen eine besonders geringe Belastung der Packstoffbahn erzielt wird.A particularly preferred embodiment of the invention provides that a device for measuring web tension acting in the transverse direction of the packaging material web is provided between the two devices, and that a control device controls the two devices as a function of the detected web tension of the packaging material web. Such a design makes it possible in particular to control the two devices in such a way that the most uniform possible course of the web tension is achieved transversely to the conveying direction of the packaging material web or, overall, a particularly low load on the packaging material web.

Zur Kontrolle der Ist-Position der Packstoffbahn ist es vorgesehen, dass zwischen der zweiten Einrichtung und der Formeinrichtung der Verpackungsmaschine ein Sensorsystem zur Erfassung der Position der Packstoffbahn angeordnet ist. Die Steuereinrichtung der Verpackungsmaschine steuert dann die beiden Einrichtungen in Abhängigkeit von der erfassten Position der Packstoffbahn an.In order to check the actual position of the packaging material web, it is provided that a sensor system for detecting the position of the packaging material web is arranged between the second device and the forming device of the packaging machine. The control device of the packaging machine then controls the two devices as a function of the detected position of the packaging material web.

Die Erfindung umfasst auch eine Verpackungsmaschine in Form einer Schlauchbeutelmaschine mit einer erfindungsgemäßen Vorrichtung zum Einstellen der Position, insbesondere der Bahnmitte der Packstoffbahn, zu einer Referenz.The invention also includes a packaging machine in the form of a tubular bag machine with a device according to the invention for adjusting the position, in particular the web center of the packaging material web, to a reference.

Weiterhin umfasst die Erfindung ein Verfahren zum Einstellen der Position, insbesondere der Bahnmitte einer Packstoffbahn, zu einer Referenz in einer Verpackungsmaschine, vorzugsweise unter Verwendung einer erfindungsgemäßen Vorrichtung, bei dem zwei, in Transportrichtung der Packstoffbahn beabstandete separate Einrichtungen zur Beeinflussung der Position der Packstoffbahn vorgesehen sind, sowie eine Steuereinrichtung zur Ansteuerung der beiden Einrichtungen, die die beiden Einrichtungen zu Erzielung einer Soll-Position in Abhängigkeit einer erfassten Ist-Position der Packstoffbahn ansteuert.Furthermore, the invention comprises a method for adjusting the position, in particular the web center of a packaging material web, to a reference in a packaging machine, preferably using a device according to the invention, in which two, in the transport direction of the packaging material spaced separate means for influencing the position of the packaging material web are provided , as well as a control device for Control of the two devices, which controls the two devices to achieve a desired position in response to a detected actual position of the packaging material web.

Zur Erzielung einer möglichst geringen mechanischen Belastung der Packstoffbahn bzw. relativ geringen Spannungen in der Packstoffbahn ist es vorgesehen, dass die Ansteuerung der beiden Einrichtungen in Abhängigkeit einer zwischen den beiden Einrichtungen erfassten Bahnspannung in der Packstoffbahn erfolgt.In order to achieve the lowest possible mechanical load on the packaging material web or relatively low stresses in the packaging material web, it is provided that the activation of the two devices takes place as a function of a web tension in the packaging material web detected between the two devices.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung.Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing.

Diese zeigt in:

Fig. 1
eine vereinfachte Draufsicht auf eine Verpackungsmaschine in Form einer Schlauchbeutelmaschine mit einer erfindungsgemäßen Vorrichtung zum Einstellen der Bahnmitte einer Packstoffbahn zu einem Referenzpunkt der Schlauchbeutelmaschine in einem ersten Betriebsmodus,
Fig. 2
die Verpackungsmaschine gemäß Fig. 1 während eines zweiten Betriebsmodus und
Fig. 3a und Fig. 3b
Ablaufdiagramme zur Erläuterung der unterschiedlichen Betriebsmodi.
This shows in:
Fig. 1
a simplified plan view of a packaging machine in the form of a tubular bag machine with a device according to the invention for adjusting the web center of a packaging material web to a reference point of the tubular bag machine in a first operating mode,
Fig. 2
the packaging machine according to Fig. 1 during a second mode of operation and
Fig. 3a and Fig. 3b
Flowcharts to explain the different operating modes.

Gleiche Elemente bzw. Elemente mit gleicher Funktion sind in den Figuren mit den gleichen Bezugsziffern versehen.The same elements or elements with the same function are provided in the figures with the same reference numerals.

In den Fig. 1 und 2 ist eine Verpackungsmaschine in Form einer Schlauchbeutelmaschine 100 dargestellt. Insbesondere erkennt man ein Form- und Füllrohr 101, das von einer Formschulter 102 umschlossen ist. Die Formschulter 102 dient zum Formen eines Packstoffschlauchs aus einer Packstoffbahn 1. Bei der Packstoffbahn 1 handelt es sich insbesondere um eine heißsiegelbare, aus Kunststoffmaterial bestehende Packstoffbahn 1, es sind jedoch auch beispielsweise mit einer Leimschicht beschichtete, aus Papier bestehende Packstoffbahnen 1 denkbar. Wesentlich ist, dass zur richtigen Formung des Packstoffschlauchs, aus dem befüllte Beutelpackungen hergestellt werden, die Bahnmitte 2 der Packstoffbahn 1 zur Formschulter 102 ausgerichtet werden muss. Im dargestellten Ausführungsbeispiel wird davon ausgegangen, dass die Bahnmitte 2 der Packstoffbahn 1 mittig zur Formschulter 102 bzw. zum Form- und Füllrohr 101 ausgerichtet werden muss, was durch die Referenzlinie 103 dargestellt ist.In the Fig. 1 and 2 a packaging machine in the form of a tubular bag machine 100 is shown. In particular, a forming and filling tube 101, which is surrounded by a forming shoulder 102, can be seen. The forming shoulder 102 serves to form a packaging material tube from a packaging material web 1. The packaging material web 1 is, in particular, a heat-sealable packaging material web 1 consisting of plastic material, but it is also conceivable, for example, with a glue layer coated paper webs 1 consisting of paper. It is essential that the web center 2 of the packaging material web 1 must be aligned with the forming shoulder 102 for the correct shaping of the packaging material hose, from which filled bag packages are produced. In the illustrated embodiment, it is assumed that the web center 2 of the packaging material web 1 must be aligned centrally with respect to the forming shoulder 102 or to the forming and filling tube 101, which is represented by the reference line 103.

Die Packstoffbahn 1 ist in Form einer Packstoffrolle bevorratet und auf einer Trägereinrichtung 15 in einer horizontalen Richtung drehbar gelagert. Dadurch wird beim Abziehen der Packstoffbahn 1, beispielsweise mittels in der Fig.1 dargestellter Transportrollen 16 bis 18, ein Transport der Packstoffbahn 1 in Richtung zur Formschulter 102 ermöglicht bzw. erleichtert.The packaging material web 1 is stored in the form of a packaging material roll and mounted rotatably on a carrier device 15 in a horizontal direction. As a result, when removing the packaging material web 1, for example by means of in the Fig.1 illustrated transport rollers 16 to 18, a transport of the packaging material web 1 in the direction of the forming shoulder 102 allows or facilitates.

Erfindungsgemäß ist es vorgesehen, dass die Schlauchbeutelmaschine 100 mit einer Vorrichtung 10 ausgestattet ist, die es ermöglicht, die Bahnmitte 2 der Packstoffbahn 1 zur Referenzlinie 103 zu positionieren bzw. auszurichten. Hierzu umfasst die Vorrichtung 10 eine erste Einrichtung 21, die durch die Trägereinrichtung 15 realisiert ist. Insbesondere weist die erste Einrichtung 21 einen nicht dargestellten Verstellantrieb auf, der es ermöglicht, die Trägereinrichtung 15, und somit auch die auf der Trägereinrichtung 15 bevorratete Packstoffbahn 1, in Richtung des Doppelpfeils 22 in einer senkrecht zur Transportrichtung 23 der Packstoffbahn 1 verlaufenden Richtung zu bewegen. Darüber hinaus umfasst die erste Einrichtung 21 zumindest einen ersten Sensor 24, der beispielsweise die eine Bahnkante 3, 3' der Packstoffbahn 1 erfasst, woraus eine Steuereinrichtung 50 in Kenntnis der Breite der Packstoffbahn 1 auf die genaue Position der Packstoffbahn 1 bzw. der Bahnmitte 2, 2' im Bereich der Trägereinrichtung 15 schließt.According to the invention it is provided that the tubular bag machine 100 is equipped with a device 10, which makes it possible to position the web center 2 of the packaging material web 1 to the reference line 103 or align. For this purpose, the device 10 comprises a first device 21, which is realized by the carrier device 15. In particular, the first device 21 has an adjusting drive, not shown, which makes it possible for the carrier device 15, and thus also for the carrier device 15, to be realized stockpiled packaging material web 1 to move in the direction of the double arrow 22 in a direction perpendicular to the transport direction 23 of the packaging material web 1 direction. In addition, the first device 21 comprises at least a first sensor 24, which detects, for example, a web edge 3, 3 'of the packaging material web 1, from which a control device 50 in knowledge of the width of the packaging material web 1 on the exact position of the packaging material web 1 and der Bahnmitte. 2 , 2 'in the region of the support means 15 closes.

Weiterhin umfasst die Vorrichtung 10 in einem Abstand A1 zur ersten Einrichtung 21 eine zweite Einrichtung 26, die einen Drehrahmen 27 mit Förder- bzw. Umlenkrollen aufweist, der zur Förderung der Packstoffbahn 1 dient. Wesentlich ist, dass der Drehrahmen 27 um eine Achse 28, die senkrecht zur Zeichenebene der Fig. 1 verläuft, in Richtung des Doppelpfeils 29 schwenkbar gelagert ist. Auch die zweite Einrichtung 26 ist mit der Steuereinrichtung 50 gekoppelt, um einerseits der Steuereinrichtung 50 die Position der zweiten Einrichtung 26 bzw. deren Winkellage als Eingangswert zuzuführen, und um andererseits von der Steuereinrichtung 50 angesteuert zu werden, um der Drehrahmen 27 in der Achse 28 in einer Soll-Position positionieren.Furthermore, the device 10 comprises at a distance A 1 to the first device 21, a second device 26, which has a rotating frame 27 with conveying or deflection rollers, which serves to convey the packaging material web 1. It is essential that the rotating frame 27 about an axis 28 which is perpendicular to the plane of the Fig. 1 runs, is pivotally mounted in the direction of the double arrow 29. The second device 26 is also coupled to the control device 50 in order on the one hand to supply the control device 50 with the position of the second device 26 or its angular position as an input value, and on the other hand by the control device 50 to drive the rotary frame 27 in the axis 28 Position in a desired position.

Mittels beider Einrichtungen 21, 26, die von der Steuereinrichtung 50 angesteuert werden bzw. mit dieser verbunden sind, lässt sich die Bahnmitte 2 der Packstoffbahn 1 in Bezug zur Referenzlinie 103 der Formschulter 102 beeinflussen. Die zweite Einrichtung 26 befindet sich in einem Abstand A2 zur Formschulter 102, der im Gegensatz zur Darstellung der Fig. 1 und 2 wesentlich geringer ist als der Abstand A1 zwischen den beiden Einrichtungen 21, 26.By means of both devices 21, 26, which are controlled by the control device 50 or are connected thereto, the web center 2 of the packaging material web 1 can be influenced in relation to the reference line 103 of the forming shoulder 102. The second device 26 is located at a distance A 2 to the forming shoulder 102, which in contrast to the representation of Fig. 1 and 2 is significantly less than the distance A 1 between the two devices 21, 26th

Weiterhin ist zwischen der zweiten Einrichtung 26 und der Formschulter 102 ein Sensorsystem 30 mit Bahnkantensensoren 31, 32 vorgesehen, deren Signale ebenfalls der Steuereinrichtung 50 als Eingangswerte zugeführt werden. Zwischen dem Sensorsystem 30 und der Formschulter 102 ist darüber hinaus beispielhaft noch eine Umlenkrolle 33 dargestellt, die die Packstoffbahn 1 der Formschulter 102 zuführt.Furthermore, a sensor system 30 with web edge sensors 31, 32 is provided between the second device 26 and the forming shoulder 102, the signals of which are also supplied to the control device 50 as input values. Between the sensor system 30 and the forming shoulder 102, a deflection roller 33, which feeds the packaging material web 1 to the forming shoulder 102, is also shown by way of example.

Ergänzend wird erwähnt, dass der Bereich zwischen der ersten Einrichtung 21 und der Formschulter 102 neben den Transportrollen 16 bis 18 und der Umlenkrolle 33 noch eine Vielzahl von weiteren Umlenk- bzw. Transportrollen aufweisen kann, die lediglich der Einfachheit halber nicht dargestellt sind. Darüber hinaus wird erwähnt, dass der Transport der Packstoffbahn 1 von der Trägereinrichtung 15 zur Formschulter 102 entweder kontinuierlich, oder aber getaktet, oder aber in einer Mischform erfolgen kann, bei der in einem Teilbereich zwischen der Trägereinrichtung 15 und der Formschulter 102 ein Pufferbereich mit sogenannten Tänzerrollen angeordnet ist, der einen Ausgleich zwischen einer taktweisen und einer kontinuierlichen Förderung der Packstoffbahn 1 ermöglicht.In addition, it is mentioned that the area between the first device 21 and the forming shoulder 102 in addition to the transport rollers 16 to 18 and the guide roller 33 is still a plurality of further deflection or transport rollers may have, which are not shown for the sake of simplicity. In addition, it is mentioned that the transport of the packaging material web 1 from the carrier device 15 to the forming shoulder 102 can take place either continuously or clocked, or in a mixed form, wherein in a partial area between the carrier device 15 and the forming shoulder 102 a buffer area with so-called Dancer rollers is arranged, which allows a balance between a cyclic and a continuous promotion of the packaging material web 1.

Zusätzlich ist es optional vorgesehen, dass im Bereich zwischen den beiden Einrichtungen 21 und 26 eine Einrichtung 35 zur Erfassung von Materialeigenschaften der Packstoffbahn 1 angeordnet ist. Insbesondere lässt sich mittels der Einrichtung 35, die ebenfalls mit der Steuereinrichtung 50 verbunden ist, ein Spannungsprofil der Bahnspannungen der Packstoffbahn 1 quer zur Transportrichtung 23 der Packstoffbahn 1 ermitteln.In addition, it is optionally provided that a device 35 for detecting material properties of the packaging material web 1 is arranged in the region between the two devices 21 and 26. In particular, by means of the device 35, which is likewise connected to the control device 50, a tension profile of the web tension of the packaging material web 1 can be determined transversely to the transport direction 23 of the packaging material web 1.

Die soweit beschriebene Vorrichtung 10 zum Einstellen der Bahnmitte 2 der Packstoffbahn 1 zu der Referenzlinie 103 der Schlauchbeutelmaschine 100 kann in verschiedenen Betriebsmodi betrieben werden. Mit Blick auf die Fig. 1 und 3a wird ein erster Betriebsmodus erläutert, bei dem durch die durchgezogenen Linien der Bahnkanten 3 und 4 der zu erreichende Endzustand der Position der Packstoffbahn 1 dargestellt ist, bei der die Bahnmitte 2 zur Referenzlinie 103 ausgerichtet ist. Durch die gestrichelte Darstellung der Packstoffbahn 1' ist ein Anfangszustand mit Bahnkanten 3', 4' dargestellt, bei der zwischen der Bahnmitte 2 im Endzustand und der Bahnmitte 2' im Anfangszustand eine seitliche Abweichung a vorhanden ist. Um aus dem Anfangszustand in den Endzustand zu gelangen, wird zunächst mittels des wenigstens einen ersten Sensors 24 die Position der Packstoffbahn 1 auf der Trägereinrichtung 15 ermittelt, und anschließend (in Kenntnis der Breite der Packstoffbahn 1) die verstellbar angeordnete Trägereinrichtung 15 bzw. die erste Einrichtung 21 durch die Steuereinrichtung 50 derart angesteuert, dass die Packstoffbahn 1 im dargestellten Ausführungsbeispiel in der Zeichenebene der Fig. 1 von rechts nach links bewegt wird, bis die Ist-Position der Packstoffbahn 1 mit der Soll-Position übereinstimmt, bei der die Bahnmitte 2 mit der Referenzlinie 103 ausgerichtet ist. Das Ausrichten der Bahnmitte 2, 2' mit der Referenzlinie 103 erfolgt dabei in Abhängigkeit von der Bahngeschwindigkeit der Packstoffbahn 1 und weiteren, verpackungsspezifischen Eigenschaften.The device 10 described so far for adjusting the web center 2 of the packaging material web 1 to the reference line 103 of the tubular bag machine 100 can be operated in various operating modes. With view on Fig. 1 and 3a a first mode of operation is explained, in which the solid state of the web edges 3 and 4 shows the end state of the position of the packaging material web 1 to be reached, in which the web center 2 is aligned with the reference line 103. The dashed representation of the packaging material web 1 ', an initial state with web edges 3', 4 'is shown, in which between the web center 2 in the final state and the web center 2' in the initial state, a lateral deviation a is present. In order to reach the final state from the initial state, the position of the packaging material web 1 on the carrier device 15 is first determined by means of the at least one first sensor 24, and then (with knowledge of the width of the packaging material web 1) the adjustably arranged carrier device 15 or the first Device 21 controlled by the control device 50 such that the packaging material web 1 in the illustrated embodiment in the plane of the Fig. 1 is moved from right to left until the actual position of the packaging material web 1 coincides with the desired position, in which the web center 2 is aligned with the reference line 103. Aligning the web center 2, 2 'with the reference line 103 takes place as a function of the web speed of the packaging material web 1 and further, packaging-specific properties.

Insbesondere bei qualitativ bezüglich des Transports relativ schlechten Materialen der Packstoffbahn 1 können jedoch große sogenannte Bogenfehler auftreten, die dafür sorgen, dass zwar die Bahnmitte 2, 2' der Packstoffbahn 1 im Bereich der Trägereinrichtung 15 mit der Soll-Position übereinstimmt (das bedeutet, dass die auf der Trägereinrichtung 15 befindliche Packmittelrolle mittig in Bezug zur Referenzlinie 103 angeordnet ist), die Bahnmitte 2, 2' an der Formschulter 102 aber dennoch eine Abweichung a aufweisen kann. Diese Abweichung a, die mittels des Sensorsystems 30 erfasst wird, kann durch die zweite Einrichtung 26, die sich im relativ geringem Abstand zur Formschulter 102 befindet, rasch ausgeglichen werden, indem die zweite Einrichtung 26 in einer der beiden Richtungen des Doppelpfeils 29 geschwenkt wird.However, especially in the case of qualitatively relatively poor materials of the packaging material web 1, large so-called bow errors can occur which ensure that the web center 2, 2 'of the packaging material web 1 in the area of the carrier device 15 coincides with the desired position (ie the packaging material roll located on the carrier device 15 is arranged centrally in relation to the reference line 103), but the web center 2, 2 'on the forming shoulder 102 can nevertheless have a deviation a. This deviation a, which is detected by means of the sensor system 30, can be compensated quickly by the second device 26, which is located at a relatively small distance from the forming shoulder 102, by the second device 26 is pivoted in one of the two directions of the double arrow 29.

In der Fig. 3a ist durch den Verlauf der Kurve X über der Zeit t die Veränderung der Bahnmitte 2' zur referenzierten Bahnmitte 2 (Kurve Y) dargestellt. Ferner erkennt man durch die Kurve Z den Verlauf des Steuersignals für die erste Einrichtung 21. Insbesondere erkennt man, dass für das soweit beschriebene Positionieren der Bahnmitte 2 zur Referenzlinie 103 grundsätzlich nur die erste Einrichtung 21 erforderlich ist. Auch das Ausgleichen der angesprochenen Bogenfehler der Packmittelbahn 1 ist grundsätzlich alleine durch die erste Einrichtung 21 ausgleichbar, wird jedoch durch die zweite Einrichtung 26 begünstigt bzw. beschleunigt.In the Fig. 3a is shown by the course of the curve X over the time t, the change of the web center 2 'to the referenced web center 2 (curve Y). In addition, the course of the control signal for the first device 21 can be recognized by the curve Z. In particular, it can be seen that basically only the first device 21 is required for positioning the web center 2 as far as the reference line 103 described above. Also, the compensation of the mentioned bow error of the packaging material web 1 is basically compensated for solely by the first device 21, but is favored or accelerated by the second device 26.

In der Fig. 2 ist ein zweiter Betriebsmodus dargestellt, der während der Produktion in einem bereits eingerichteten Zustand der Packstoffbahn 1 beim bereits ausgerichteten Zustand der Bahnmitte 2 zur Referenzlinie 103 auftreten kann. Da die zweite Einrichtung 26 in einem relativ geringem Abstand A2 zur Formschulter 102 bzw. zur Referenzlinie 103 an der Formschulter 102 angeordnet ist, kann es unter anderem dazu kommen, dass die zweite Einrichtung 26 bereits derart stark um die Achse 28 geschwenkt ist, dass sich diese nahe am Rand ihres Arbeitsbereiches, was durch die gestrichelte Darstellung des Drehrahmens 27 dargestellt sein soll, befindet. In diesem Fall ist eine weitere Korrektur der Bahnmitte 2 bei einer von der Sensoreinrichtung 30 festgestellten Abweichung a in besagte Richtung nicht mehr möglich. Es ist daher zur Vermeidung von Produktionspausen wünschenswert, dass die zweite Einrichtung 26 aus der gestrichelten Darstellung wieder in eine mittlere Position (zurück-)geschwenkt wird, aus der heraus Abweichungen a der Bahnmitte 2 in Bezug zur Referenzlinie 103 in beide Richtungen durch die zweite Einrichtung 26 ausgeglichen werden können. Dies erfolgt dadurch, dass die erste Einrichtung 21 die Trägereinrichtung 15 aus der durch die gestrichelte Darstellung ersichtlichen Position nach rechts verschiebt, so dass die zweite Einrichtung 26 bezüglich ihres Winkels zur Achse 28 in Richtung ihrer mittleren Position zurückgeschwenkt werden kann. Die Funktionsweise dieses zweiten Betriebsmodus ist durch die Fig. 3b verdeutlicht. Darin ist dargestellt, dass die Ist-Position und die Soll-Position der Bahnmitte 2 (Kurve X) während der gesamten Zeit mit der Referenzlinie 103 ausgerichtet ist. Durch die Kurve Y wird das Steuersignal für die erste Einrichtung 21 verdeutlicht, welches nach einer gewissen Zeit ein Rückführen der zweiten Einrichtung 26 in ihre Mittelposition ermöglicht, was durch die Kurve Z (Steuersignal der zweiten Einrichtung 26) verdeutlicht wird.In the Fig. 2 a second mode of operation is shown, which may occur during production in an already established state of the packaging material web 1 in the already aligned state of the web center 2 to the reference line 103. Since the second device 26 is arranged at a relatively small distance A 2 to the forming shoulder 102 and to the reference line 103 on the forming shoulder 102, it can happen inter alia that the second device 26 is already pivoted so strongly about the axis 28 that this is close to the edge of their work area, which should be represented by the dashed representation of the rotating frame 27 is located. In this case, a further correction of the web center 2 is no longer possible with a deviation a detected by the sensor device 30 in said direction. It is Therefore, in order to avoid pauses in production, it is desirable for the second means 26 to be (re) pivoted from the dashed representation back to a middle position, from which deviations a of the web center 2 with respect to the reference line 103 are compensated in both directions by the second means 26 can be. This is done by the first device 21 shifting the carrier device 15 to the right from the position shown by the dashed representation, so that the second device 26 can be swiveled back relative to its angle to the axis 28 in the direction of its middle position. The operation of this second mode of operation is through the Fig. 3b clarified. It is shown that the actual position and the desired position of the web center 2 (curve X) is aligned with the reference line 103 during the entire time. By the curve Y, the control signal for the first device 21 is illustrated, which after a certain time, a return of the second device 26 allows in its center position, which is illustrated by the curve Z (control signal of the second device 26).

Die soweit beschriebene Vorrichtung 10 kann in vielfältiger Art und Weise abgewandelt bzw. modifiziert werden, ohne von den Gegenständen der unabhängigen Ansprüche abzuweichen. Insbesondere ist es auch denkbar, die beiden Einrichtung 21, 26 in Abhängigkeit des von der Einrichtung 35 erfassten Bahnspannungsverlaufs derart anzusteuern, dass quer zur Längsausrichtung der Packstoffbahn 1 in dieser bestimmte Spannungen nicht überschritten werden, um das Material der Packstoffbahn 1 möglichst wenig zu belasten. Weiterhin soll die Anwendung der Vorrichtung 10 nicht auf Schlauchbeutelmaschinen 100 begrenzt sein, sondern kann auch bei anderen Verpackungsmaschinen verwendet werden. Auch kann es vorgesehen sein, dass bei einer Annäherung der ersten Einrichtung 21 an eine ihrer seitlichen Endpositionen in Analogie zu dem im Zusammenhang mit der Fig. 2 und 3b erläuterten Modus die zweite Einrichtung 26 derart angesteuert wird, dass die erste Einrichtung 21 wieder in Richtung ihrer Mittelposition bewegt werden kann.The device 10 described so far can be modified or modified in many ways, without departing from the objects of the independent claims. In particular, it is also conceivable to control the two devices 21, 26 as a function of the web tension profile detected by the device 35 such that certain stresses are not exceeded transversely to the longitudinal orientation of the packaging material web 1 in order to load the material of the packaging web 1 as little as possible. Furthermore, the application of the device 10 should not be limited to tubular bag machines 100, but can also be used in other packaging machines. It can also be provided that when the first device 21 approaches one of its lateral end positions in analogy to that in connection with FIG Fig. 2 and 3b explained mode, the second device 26 is driven such that the first device 21 can be moved again in the direction of its central position.

Claims (8)

  1. Apparatus (10) for adjusting the position of a packaging-material web (1, 1'), in particular of the centre (2, 2') of the packaging-material web (1, 1'), in relation to a reference (103) in a packaging machine,
    wherein
    two devices (21, 26) are provided for adjusting the position of the packaging-material web (1, 1'), wherein the first device (21) is designed for displacing the packaging-material web (1, 1') linearly in a direction running perpendicularly to the transporting direction (23) of the packaging-material web (1, 1') and the second device (26) is designed for pivoting the packaging-material web (1, 1') about an axis (28) arranged perpendicularly to the transporting direction (23) of the packaging-material web (1, 1'), wherein the two devices (21, 26) each have a central position and two end positions, characterized in that the apparatus comprises a control device, wherein, when the first or second device (21, 26) is approaching an end position, the control device (50) activates the respectively other device (26, 21) such that the first-mentioned device (21, 26) can be moved in the direction of its central position again.
  2. Apparatus according to Claim 1,
    characterized
    in that the first device (21) is a constituent part of a carrier device (15), in which the packaging-material web (1) is stored in the form of a packaging-material roll.
  3. Apparatus according to Claim 1 or 2,
    characterized
    in that the second device (26) comprises a rotary frame (27) which can be pivoted about the axis (28), and in that a first distance (A1) between the two devices (21, 26) is greater than a second distance (A2) between the second device (26) and a forming device (102) of the packaging machine, the reference (103) being arranged in the region of said forming device.
  4. Apparatus according to one of Claims 1 to 3, characterized
    in that the two devices (21, 26) have provided between them a device (35) for measuring web tensioning acting in the transverse direction of the packaging-material web (1, 1'), and in that the control device (50) activates the two devices (21, 26) in dependence on the web tensioning detected for the packaging-material web (1, 1').
  5. Apparatus according to Claim 3 or 4,
    characterized
    in that a sensor system (30) for detecting the position of the packaging-material web (1, 1') is arranged between the second device (26) and the forming device (102).
  6. Packaging machine in the form of a tubular-bag machine (100), having an apparatus (10) according to one of Claims 1 to 5.
  7. Method for adjusting the position, in particular the centre (2, 2'), of a packaging-material web (1, 1') in relation to a reference (103) in a packaging machine, preferably by means of an apparatus (10) according to one of Claims 1 to 5, in the case of which two separate devices (21, 26), which are spaced apart in the transporting direction (23) of the packaging-material web (1, 1'), are provided in order to influence the position of the packaging-material web (1, 1'), and also provided is a control device (50) for activating the two devices (21, 26), the control device activating the two devices (21, 26) in order to achieve a desired position in dependence on an actual position detected for the packaging-material web (1, 1'), wherein the two devices (21, 26) each have a central position and two end positions, characterized
    in that, when the first or second device (21, 26) is approaching an end position, the control device (50) activates the respectively other device (26, 21) such that the first-mentioned device (21, 26) can be moved in the direction of its central position again.
  8. Method according to Claim 7,
    characterized
    in that the two devices (21, 26) are activated in dependence on a web tensioning which is detected in the packaging-material web (1, 1') between the two devices (21, 26).
EP15716767.7A 2014-05-14 2015-04-10 Device and method for adjusting the position of a packaging material web with respect to a reference in a packaging machine Active EP3142952B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014209095.4A DE102014209095A1 (en) 2014-05-14 2014-05-14 Apparatus and method for adjusting the position of a packaging material web to a reference in a packaging machine and packaging machine
PCT/EP2015/057871 WO2015172949A1 (en) 2014-05-14 2015-04-10 Device and method for adjusting the position of a packaging material path relative to a reference in a packaging machine

Publications (2)

Publication Number Publication Date
EP3142952A1 EP3142952A1 (en) 2017-03-22
EP3142952B1 true EP3142952B1 (en) 2018-03-14

Family

ID=52875675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15716767.7A Active EP3142952B1 (en) 2014-05-14 2015-04-10 Device and method for adjusting the position of a packaging material web with respect to a reference in a packaging machine

Country Status (4)

Country Link
EP (1) EP3142952B1 (en)
DE (1) DE102014209095A1 (en)
ES (1) ES2673624T3 (en)
WO (1) WO2015172949A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019219967A1 (en) * 2018-05-18 2019-11-21 Gea Food Solutions Germany Gmbh Method for controlling the position of a material web edge
DE102022130815A1 (en) 2022-11-22 2024-05-23 Weber Food Technology Gmbh Packaging machine and method for packaging food products

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3733129C2 (en) * 1987-10-01 1999-02-18 Focke & Co Device for separating a material web into two partial webs
US5174096A (en) * 1990-10-05 1992-12-29 Ishida Scales Mfg. Co., Ltd. Form-fill-seal type packaging machine
DE4444228C2 (en) 1994-12-13 1997-12-18 Fife Gmbh Device for the lateral guidance of a running material web
DE19516871A1 (en) * 1995-05-09 1996-11-14 Rovema Gmbh Sachet-making machine with device for varying tension at edges of film
DE102007003727B4 (en) 2007-01-25 2009-06-18 Koenig & Bauer Aktiengesellschaft Web guiding device
DE102011003666A1 (en) 2011-02-04 2012-08-09 Rovema Gmbh Tubular bag machine for manufacturing bag used for packing food product, has motion sensor and film web drive units that are connected with control element which controls state of motion of film web portion

Also Published As

Publication number Publication date
ES2673624T3 (en) 2018-06-25
DE102014209095A1 (en) 2015-11-19
WO2015172949A1 (en) 2015-11-19
EP3142952A1 (en) 2017-03-22

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