EP2707288A2 - Method for actuating the band driving device of a strapping machine and corresponding strapping machine - Google Patents

Method for actuating the band driving device of a strapping machine and corresponding strapping machine

Info

Publication number
EP2707288A2
EP2707288A2 EP12719363.9A EP12719363A EP2707288A2 EP 2707288 A2 EP2707288 A2 EP 2707288A2 EP 12719363 A EP12719363 A EP 12719363A EP 2707288 A2 EP2707288 A2 EP 2707288A2
Authority
EP
European Patent Office
Prior art keywords
strapping
unit
einschieß
return
einschießrichtung
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.)
Granted
Application number
EP12719363.9A
Other languages
German (de)
French (fr)
Other versions
EP2707288B1 (en
Inventor
Jürgen Höhn
Jochen WITZGALL
Jürgen SCHÖDEL
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.)
SMB Schwede Maschinenbau GmbH
Original Assignee
SMB Schwede Maschinenbau GmbH
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.)
Filing date
Publication date
Application filed by SMB Schwede Maschinenbau GmbH filed Critical SMB Schwede Maschinenbau GmbH
Priority to PL12719363T priority Critical patent/PL2707288T3/en
Publication of EP2707288A2 publication Critical patent/EP2707288A2/en
Application granted granted Critical
Publication of EP2707288B1 publication Critical patent/EP2707288B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • 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
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B2210/00—Specific aspects of the packaging machine
    • B65B2210/12—Means for automatically detecting and removing jammed straps in strapping machines, e.g. jam clearing devices

Definitions

  • the invention relates to a method for controlling a belt drive device of a strapping machine in the event of belt loss in its catch-up unit according to the preamble of patent claim 1 and to a strapping machine with a correspondingly controlled belt drive device.
  • a strapping machine is z. B. known from DE 196 02 579 AI. It has, in addition to the notorious manner in such devices existing components such as machine frame, work table, and tape guide frame for moving the Umreifungsbandes around the object to be strapped as a loose loop, a placed under the work table tape drive on device.
  • This comprises a combined Einsch man-retrieval unit for shooting the strapping in the tape guide frame and for retrieving the strapping tape from the tape guide frame to the application of the strapping around the object to be strapped. Furthermore, an often stack height-dependent back tensioning device for tightening the strapping band is provided around the object.
  • the Einsch man-retrieval unit has at least one pair of rollers, between the roller gap, the strapping of one of the rollers in the insertion and return direction is driven passed.
  • the return tension unit has a further pair of rollers, between the roller gap of the strapping is also passed and at least one of the rollers in the return direction around the material to be strapped in the strapping machine can be tensioned.
  • Guide channel sections are finally provided for guiding the strapping band through the band drive device, which guide the strapping band led from a supply roll or intermediate storage device to the back tension unit, between the latter and the insertion return unit and from there in the direction of the band frame on the work table.
  • the guide channel sections are each formed by the strapping band on both sides of its flat sides leading cheeks, which are designed as webs or side surfaces of larger prismatic bodies.
  • a typical problem in the operation of such a strapping machine sometimes occurs due to improper handling of the strapping band.
  • the leading end of the tape can not reach the welding head and thus arranged there, e.g. in the form of a limit switch realized detector for detecting the leading end of the tape at the end of its Einsch manweges in the tape guide frame not operate.
  • This recognizes the control of the strapping machine and then ensures a recovery of the strapping band, usually until it emerges from the pair of drive rollers of the band drive device against the direction of insertion backwards.
  • the aforementioned error case is usually monitored by a scanning device, which detects the fact that the strapping has leaked out of the Einsch man-return unit counter to the Einschmanraum.
  • EP 1 489 005 A2 corresponding method for driving a tape drive device is specified, with which the described error case without manual intervention in a much shorter time can be repaired. Accordingly, the back unit in its drive direction is reversible such that when a fault detection - that is, a loss of tape in the Einsch man-return unit - the strapping is quasi automatically transported back to the Einsch man-return unit.
  • a disadvantage of this control method is the fact that the fault condition and the drive of the belt by means of a suitable sensor, e.g. an incremental encoder must be detected on the pinch roller of the Einsch man- retrieval unit. Its signal is then to be further processed in the control program and integrated into the control sequence. This brings a control technology and additional equipment with it.
  • a suitable sensor e.g. an incremental encoder
  • the method according to the invention it is possible to dispense with the separate detector in the region of the insertion-return unit, since it is no longer necessary to actively detect the presence of the strap in the local pair of rollers. Rather, it is ensured by the timing of the retrieval of the strap with a certain return speed reliable exit of the strap from the drive roller pair. Since the back tension unit is used to retrieve the strapping When the firing / retrieval unit is opened and thus inactive, the strapping belt also stops as soon as it has left the shoot-in / retrieve unit. This is independent of whether the latter is still driven. The strapping is thus available for re-introduction into the Einsch man-retrieval unit with the help of running in their drive direction opposite to the clamping direction back tension unit.
  • FIGS 2 and 3 are schematic side views of the tape drive means of this strapping machine in different positions of the strapping band.
  • the strapping machine has a mounted on rollers machine frame 1, on which a work table 2 is mounted.
  • the work table 2 has (not shown) conveyor belts by means of which the objects 4 to be strapped, such. B. a magazine stack in Fig. 1, is transported to the strapping position on the work table 2.
  • a turntable can additionally be integrated into the worktable 2, as can be taken from EP 0 445 429 B1.
  • a vertically standing tape guide frame 6 is arranged, with the aid of which the strap 7 can be guided around the object 4 on the work table 2 as a loose loop.
  • the strapping band 7 stored on a side of the machine frame 1 on a supply spool not shown in more detail is injected into the band guide frame 6 forming the insertion path by the band drive means 5 shown only diagrammatically in FIG. 1 under the work table 2 by the welding head 3 of the strapping machine guided around this until it arrives in the welding head 3 again.
  • the detector arranged there at the end of the insertion path in the form of a limit switch 16 detects the orderly arrival of the strapping band seven. Whose end of the tape is fixed there and the strapping 7 then retrieved using the tape drive means 5, wherein it emerges from the tape guide frame 6 and puts itself around the object 4 as a still unstressed loop. Subsequently, using the
  • the basic assemblies are, on the one hand, the insertion-return unit 8 and, on the other hand, the return clamping unit 9, which Perform banded manipulations as described.
  • a first guide channel section 10 leads the strap 7 of supply roll or buffer (not shown) arriving to the return unit 9.
  • a second guide channel section 1 1 connects the return unit 9 and the Einschmann- return unit 8.
  • a last guide channel section 12 leads from the insertion-return unit 8 toward the welding head 3 and the entry point of the strap 7 in the tape guide frame. 6
  • the Einsch manurfact-retrieval unit 8 has a drive roller pair 13 with a by a motor (not shown) driven roller 14 and a non-driven pressure roller 15.
  • the roller 14 of the drive roller pair 13 in circulation in the appropriate direction and circumscribed the strap 7 in the tape guide frame 6 until its leading end 40 under detection by the limit switch 16 comes to lie in the region of the welding head 3 and is fixed there. Subsequently, the drive roller pair 13 is activated in the opposite direction and thereby the strap 7 retrieved as described above until it is placed around the object to be strapped substantially without tension around.
  • the back tensioning unit 9 has a pair of tensioning rollers 17 with rollers 18, 19 which can be coupled to one another and then, by means of its drive motor (not shown), subsequently apply a high tensile force to the return tension of the strapping belt 7 around the object 4 to be strapped.
  • the guide channel sections 10, 11 are jointly formed by web-shaped cheeks 20, 21 guided over the rollers 18, 19, which are fixed in the tape drive device 5 via projecting support feet 22, 23 in a manner to be explained in more detail.
  • the rollers 18, 19 engage in the drawing not closer to recognizable recesses in the cheeks 20, 21 therethrough.
  • the guide channel portion 12 is also formed by mutual cheeks 24, 25, wherein the one cheek 24 is formed by the side surface of a prismatic body 26 approximately T-shaped in plan view.
  • the other cheek 25 is bent in a curved portion corresponding to the outer periphery of the roller 14 through a wrap angle for the curling belt 7 and continues in a straight portion. It is formed on a corresponding, elongated prismatic body 27 as a side surface.
  • the trigger is the fact that with the end of the defined for the insertion of the Umreifungsbandes 7 in the machine control time of, for example, 0.2 s, the limit switch 16 does not respond. This is a signal that the strapping 7 with its leading end 40 has not reached the welding head 3 faulty. Due to this error detection the Einsch man-retrieval unit 8 is activated so that with a much lower return speed than when shooting the strapping 7 is transported against the Einschlegicardi E backwards. The return time is defined so that with certainty the strapping 7 is completely pulled out of the Einschtigweg and Einsch man-return unit 8. Thus, the strapping band 7 with its leading end 40 remains between it and the back tension unit 9.
  • the return time can also be defined variably by a type of self-learning system in that the return time is determined by deriving the required time from the previous shot in direct proportionality to the reduced return speed.
  • the control of the strapping machine then activates the back tension unit 9 against its usual back tensioning direction, which is directed counter to the insertion direction E.
  • the roller 18 of the tensioning roller pair 17 is rotated in the counterclockwise direction, so that the strapping 7 is again transported in the insertion direction E from the position shown in Fig. 3 upwards in the roller gap of the drive roller pair 13 of the Einsch man-return unit 8. This takes up the leading end 40 of the strap 7 again.
  • the drive roller 14 of the insertion-return unit 8 the strapping 7 is again injected into the tape guide frame 6. In this case, the drive of the back tension unit 9 can be overridden again.

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

Abstract

A method for actuating the band driving device of a strapping machine in the event of band loss has the following method steps: interrogating a detector (16) about correct insertion of the strapping band (7) in the insertion direction (E) up to the end of the insertion path, in the event of incorrect insertion of the strapping band (7), activating the insertion-return unit (8) in order to return the strapping band (7) at a defined return speed over a defined return time, such that the strapping band (7) has emerged from the insertion-return unit (8) counter to the insertion direction (E), and actuating the drive of the tensioning unit (9) such that the tensioning unit (9) transports the strapping band (7) back into the insertion-return unit (8) in the insertion direction (E).

Description

Verfahren zur Ansteuerung der Bandantriebseinrichtung einer Umrei- fungsmaschine sowie entsprechende Umreifungsmaschine  Method for controlling the belt drive device of a strapping machine and corresponding strapping machine
Die Erfindung betrifft ein Verfahren zum Ansteuern einer Bandantriebsein- richtung einer Umreifungsmaschine bei einem Bandverlust in ihrer Ein- schieß- ückholeinheit gemäß dem Oberbegriff des Patentanspruchs 1 sowie eine Umreifungsmaschine mit einer entsprechend gesteuerten Bandantriebseinrichtung. Eine Umreifungsmaschine ist z. B. aus der DE 196 02 579 AI bekannt. Sie weist neben den notorischer Weise bei solchen Gerätschaften vorhandenen Bauteilen, wie Maschinengestell, Arbeitstisch, und Bandführungsrahmen zum Herumführen des Umreifungsbandes um das zu umreifende Objekt als lose Schlinge, eine unter dem Arbeitstisch platzierte Bandantriebseinrich- tung auf. Diese umfasst eine kombinierte Einschieß-Rückhol-Einheit zum Einschießen des Umreifungsbandes in den Bandführungsrahmen und zum Zurückholen des Umreifungsbandes aus dem Bandführungsrahmen bis zum Anlegen des Umreifungsbandes um das zu umreifende Objekt. Ferner ist eine oftmals stapelhöhenabhängige Rückspanneinrichtung zum Straff- ziehen des Umreifungsbandes um das Objekt vorgesehen. The invention relates to a method for controlling a belt drive device of a strapping machine in the event of belt loss in its catch-up unit according to the preamble of patent claim 1 and to a strapping machine with a correspondingly controlled belt drive device. A strapping machine is z. B. known from DE 196 02 579 AI. It has, in addition to the notorious manner in such devices existing components such as machine frame, work table, and tape guide frame for moving the Umreifungsbandes around the object to be strapped as a loose loop, a placed under the work table tape drive on device. This comprises a combined Einschieß-retrieval unit for shooting the strapping in the tape guide frame and for retrieving the strapping tape from the tape guide frame to the application of the strapping around the object to be strapped. Furthermore, an often stack height-dependent back tensioning device for tightening the strapping band is provided around the object.
Die Einschieß-Rückhol-Einheit weist mindestens ein Paar von Rollen auf, zwischen deren Rollenspalt das Umreifungsband von einer der Rollen in Einschieß- und Rückholrichtung antreibbar hindurchgeführt ist. Die Rück- spann-Einheit weist ein weiteres Paar von Rollen auf, zwischen deren Rollenspalt das Umreifungsband ebenfalls hindurchgeführt ist und mindestens von einer der Rollen in Rückholrichtung um das zu umreifende Gut in der Umreifungsmaschine spannbar ist. Zur Führung des Umreifungsbands durch die Bandantriebseinrichtung sind schließlich Führungskanalabschnitte vorgesehen, die das von einer Vorratsrolle bzw. einer Zwischenspeichereinrichtung herangeführte Umreifungs- band zur Rückspann-Einheit, zwischen dieser und der Einschieß- Rückholeinheit sowie von dieser in Richtung Bandrahmen auf dem Arbeitstisch führen. Die Führungskanalabschnitte sind jeweils durch das Um- reifungsband beiderseits dessen Flachseiten führenden Wangen gebildet, die als Stege oder Seitenflächen von größeren prismatischen Körpern ausgeführt sind. The Einschieß-retrieval unit has at least one pair of rollers, between the roller gap, the strapping of one of the rollers in the insertion and return direction is driven passed. The return tension unit has a further pair of rollers, between the roller gap of the strapping is also passed and at least one of the rollers in the return direction around the material to be strapped in the strapping machine can be tensioned. Guide channel sections are finally provided for guiding the strapping band through the band drive device, which guide the strapping band led from a supply roll or intermediate storage device to the back tension unit, between the latter and the insertion return unit and from there in the direction of the band frame on the work table. The guide channel sections are each formed by the strapping band on both sides of its flat sides leading cheeks, which are designed as webs or side surfaces of larger prismatic bodies.
Ein typisches Problem beim Betrieb einer solchen Umreifungsmaschine tritt bisweilen durch eine fehlerhafte Handhabung des Umreifungsbands auf. So kann beispielsweise durch Hindernisse im Bandführungsrahmen das vorlaufende Bandende den Schweißkopf nicht erreichen und damit den dort angeordneten, z.B. in Form eines Endschalters realisierten Detektor zur Erfassung des voreilenden Bandendes am Ende dessen Einschießweges im Bandführungsrahmen nicht betätigen. Dies erkennt die Steuerung der Umreifungsmaschine und sorgt dann für ein Zurückholen des Umreifungsbands, üblicherweise bis dieses aus dem Antriebsrollenpaar der Bandan- triebseinrichtung entgegen der Einschießrichtung nach hinten austritt. A typical problem in the operation of such a strapping machine sometimes occurs due to improper handling of the strapping band. For example, by obstacles in the tape guide frame, the leading end of the tape can not reach the welding head and thus arranged there, e.g. in the form of a limit switch realized detector for detecting the leading end of the tape at the end of its Einschießweges in the tape guide frame not operate. This recognizes the control of the strapping machine and then ensures a recovery of the strapping band, usually until it emerges from the pair of drive rollers of the band drive device against the direction of insertion backwards.
Der vorgenannte Fehlerfall wird üblicherweise durch eine Abtasteinrichtung überwacht, die den Umstand detektiert, dass das Umreifungsband aus der Einschieß-Rückhol-Einheit entgegen der Einschießrichtung ausgetreten ist. The aforementioned error case is usually monitored by a scanning device, which detects the fact that the strapping has leaked out of the Einschieß-return unit counter to the Einschießrichtung.
Zur Behebung des Fehlers war es bei den bekannten Umreifungsmaschinen bisher notwendig, die Bandantriebseinrichtung zu öffnen und das Umreifungsband von Hand in die Einschieß-Rückhol-Einheit einzufädeln,damit der Einschießvorgang von Neuem beginnen kann. Dies bedingt eine erhebliche Ausfallzeit der Umreifungsmaschine, die grundsätzlich unerwünscht ist und im Hinblick auf eine mögliche Vernetzung der Umreifungsmaschine in eine durchgehende Produktionsstraße beispielsweise von Print- Produkten im Extremfall zu einem Stillstand der gesamten Produktionslinie führen kann. To remedy the error, it was previously necessary in the known strapping machines to open the tape drive device and thread the strapping by hand in the Einschieß-return unit, so The Einschießvorgang can start again. This requires a considerable downtime of the strapping machine, which is basically undesirable and can lead to a standstill of the entire production line in extreme cases, with a view to possible networking of the strapping machine in a continuous production line, for example, print products.
In der EP 1 489 005 A2 ist entsprechendes Verfahren zum Ansteuern einer Bandantriebs Vorrichtung angegeben, mit dem der geschilderte Fehlerfall ohne manuellen Eingriff in deutlich kürzerer Zeit behebbar ist. Demnach ist die ückspann-Einheit in ihrer Antriebsrichtung derart umsteuerbar, dass bei einer erfolgten Fehlerdetektion - das heißt einem Bandverlust in der Einschieß-Rückhol-Einheit - das Umreifungsband quasi automatisch in die Einschieß-Rückhol-Einheit zurücktransportiert wird. In EP 1 489 005 A2 corresponding method for driving a tape drive device is specified, with which the described error case without manual intervention in a much shorter time can be repaired. Accordingly, the back unit in its drive direction is reversible such that when a fault detection - that is, a loss of tape in the Einschieß-return unit - the strapping is quasi automatically transported back to the Einschieß-return unit.
Von Nachteil bei diesem Steuerungsverfahren ist die Tatsache, dass der Fehlerzustand und der Antrieb des Bandes mittels eines geeigneten Sensors, z.B. einem Inkrementalgeber an der Andruckrolle der Einschieß- Rückhol-Einheit detektiert werden muss. Dessen Signal ist dann im Steue- rungsprogramm weiter zu verarbeiten und in den Steuerungsablauf einzubinden. Dies bringt einen steuerungstechnischen und apparativen Mehraufwand mit sich. A disadvantage of this control method is the fact that the fault condition and the drive of the belt by means of a suitable sensor, e.g. an incremental encoder must be detected on the pinch roller of the Einschieß- retrieval unit. Its signal is then to be further processed in the control program and integrated into the control sequence. This brings a control technology and additional equipment with it.
Dieser Nachteil trifft noch deutlicher für die in ihrem konstruktiven Aufbau von Einschieß-, Rückhol- und Rückspann-Einheit abweichenden Umreifungsmaschine gemäß der DE 603 18 160 T2 zu. Hier wird die eingeschossene und im Fehlerfall rückgezogene Bandlänge detektiert und das Band mit zwei unterschiedlichen Bandgeschwindigkeiten bis zur Ausgangsposition vor dem Wiedereinfädeln gezogen. Der Erfindung liegt demzufolge die Aufgabe zu Grunde, ein vereinfachtes, gleichwohl zuverlässiges Ansteuerungsverfahren für die Bandantriebseinrichtung einer Umreifungsmaschine zur Behebung des eingangs geschilder- ten Fehlerfalles anzugeben. This disadvantage is even more pronounced for the deviating in their structural design of Einschieß-, Rückhol- and Rückspann unit strapping machine according to DE 603 18 160 T2. Here, the shot and retracted in case of error tape length is detected and pulled the tape with two different tape speeds to the starting position before re-threading. The invention is therefore based on the object to provide a simplified, yet reliable driving method for the belt drive device of a strapping machine for the elimination of the above-mentioned error case.
Diese Aufgabe wird durch die im Kennzeichnungsteil des Anspruches 1 angegebenen Verfahrensschritte wie folgt gelöst: This object is achieved by the method steps indicated in the characterizing part of claim 1 as follows:
- Abfragen des Detektors zur Erfassung des voreilenden Bandendes auf ordnungsgemäßes Einschießen des Umreifungsbandes in Einschießrichtung bis zum Ende des Einschießweges,  Interrogation of the detector for detecting the leading end of the tape for proper insertion of the strap in Einschießrichtung to the end of Einschießweges
- bei nicht-ordnungsgemäßem Einschießen des Umreifungsbandes Aktivieren der Einschieß-Rückhol-Einheit zum Rückholen des Umreifungsbandes mit einer definierten Rückhol-Geschwindigkeit über eine definierte Rückhol-Zeit derart, dass das Umreifungsband entgegen der Einschießrichtung aus der Einschieß-Rückhol-Einheit ausgetreten ist, und  - In case of improper insertion of the strapping band activating the Einschieß-return unit for retrieving the strapping at a defined return speed over a defined return time such that the strapping has leaked against the Einschießrichtung from the Einschieß-retrieval unit, and
- Ansteuern des Antriebs der Rückspann-Einheit derart, dass die  - Driving the drive of the Rückspann unit such that the
Rückspann-Einheit das Umreifungsband in Einschießrichtung in die Einschieß-Rückhol-Einheit zurücktransportiert.  Rückspann unit transported back the Umreifungsband in Einschießrichtung in Einschieß-return unit.
Aufgrund des erfindungsgemäßen Verfahrens ist es möglich, auf den separaten Detektor im Bereich der Einschieß-Rückhol-Einheit zu verzichten, da es nicht mehr notwendig ist, das Vorhandensein des Umreifungsbandes in dem dortigen Rollenpaar aktiv zu erfassen. Es wird vielmehr durch die zeitliche Steuerung der Rückholung des Umreifungsbandes mit einer bestimmten Rückhol-Geschwindigkeit das zuverlässige Austreten des Umreifungsbandes aus dem Antriebs-Rollenpaar gewährleistet. Da die Rückspann-Einheit beim Zurückholen des Umreifungsbandes mithilfe der Ein- schieß-Rückhol-Einheit geöffnet und damit inaktiv ist, bleibt das Umrei- fungsband auch stehen, sobald es die Einschieß-Rückhol-Einheit verlassen hat. Dies ist unabhängig davon, ob Letztere noch weiter angetrieben ist. Das Umreifungsband steht also mit Sicherheit zum Wiedereinführen in die Einschieß-Rückhol-Einheit mithilfe der in ihrer Antriebsrichtung entgegen der Spannrichtung laufenden Rückspann-Einheit zur Verfügung. Due to the method according to the invention, it is possible to dispense with the separate detector in the region of the insertion-return unit, since it is no longer necessary to actively detect the presence of the strap in the local pair of rollers. Rather, it is ensured by the timing of the retrieval of the strap with a certain return speed reliable exit of the strap from the drive roller pair. Since the back tension unit is used to retrieve the strapping When the firing / retrieval unit is opened and thus inactive, the strapping belt also stops as soon as it has left the shoot-in / retrieve unit. This is independent of whether the latter is still driven. The strapping is thus available for re-introduction into the Einschieß-retrieval unit with the help of running in their drive direction opposite to the clamping direction back tension unit.
Wie ohne Weiteres erkennbar ist, wird der geschilderte Fehlerfall also nach wie vor ohne manuellen Eingriff in die Bandantriebseinrichtung unter Einsatz einer konstruktiv vereinfachten Antriebstechnik zuverlässig behoben. As can readily be seen, the described fault is thus still reliably eliminated without manual intervention in the belt drive device using a structurally simplified drive technology.
In den abhängigen Ansprüchen sind bevorzugte Ausführungsformen des erfindungsgemäßen Ansteuerungs Verfahrens bzw. einer Umreifungsma- schine mit einer entsprechenden Bandantriebseinrichtung angegeben, deren Merkmale, Einzelheiten und Vorteile sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels anhand der beigefügten Zeichnungen ergeben. Es zeigen: eine schematische Seitenansicht einer Umreifungsmaschi- ne, sowie In the dependent claims preferred embodiments of the driving method according to the invention or a strapping machine are given with a corresponding tape drive means whose features, details and advantages will become apparent from the following description of an embodiment with reference to the accompanying drawings. Shown are: a schematic side view of a strapping machine, as well
Fig. 2 und 3 schematische Seitenansichten der Bandantriebseinrichtung dieser Umreifungsmaschine in unterschiedlichen Positionen des Umreifungsbands. 2 and 3 are schematic side views of the tape drive means of this strapping machine in different positions of the strapping band.
Wie aus Fig. 1 hervorgeht, weist die Umreifungsmaschine ein auf Rollen gelagertes Maschinengestell 1 auf, auf dem ein Arbeitstisch 2 angebracht ist. Der Arbeitstisch 2 weist (nicht dargestellte) Förderbänder auf, mittels denen die zu umreifenden Objekte 4, wie z. B. ein Zeitschriftenstapel in Fig. 1 , in die Umreifungsposition auf dem Arbeitstisch 2 transportiert wird. Für sogenannte Kreuzumreifungen kann in den Arbeitstisch 2 zusätzlich noch ein Drehteller integriert sein, wie er der EP 0 445 429 B 1 entnehmbar ist. As is apparent from Fig. 1, the strapping machine has a mounted on rollers machine frame 1, on which a work table 2 is mounted. The work table 2 has (not shown) conveyor belts by means of which the objects 4 to be strapped, such. B. a magazine stack in Fig. 1, is transported to the strapping position on the work table 2. For so-called cross strapping, a turntable can additionally be integrated into the worktable 2, as can be taken from EP 0 445 429 B1.
Auf dem Arbeitstisch 2 ist ein vertikal stehender Bandführungsrahmen 6 angeordnet, mit dessen Hilfe das Umreifungsband 7 um das Objekt 4 auf dem Arbeitstisch 2 als lose Schlinge herumgeführt werden kann. Dazu wird das auf einer seitlich am Maschinengestell 1 auf einer nicht näher darge- stellten Vorratsspule bevorratete Umreifungsband 7 durch die in Fig. 1 nur schematisch dargestellte Bandantriebseinrichtung 5 unter dem Arbeitstisch 2 durch den Schweißkopf 3 der Umreifungsmaschine in den den Einschießweg bildenden Bandführungsrahmen 6 eingeschossen und dabei um diesen herumgeführt, bis es wieder im Schweißkopf 3 ankommt. Der dort am Ende des Einschießweges angeordnete Detektor in Form eines Endschalters 16 erfasst das ordnungsgemäße Ankommen des Umreifungsban- des sieben. Dessen Bandende wird dort fixiert und das Umreifungsband 7 dann mithilfe der Bandantriebseinrichtung 5 zurückgeholt, wobei es aus dem Bandführungsrahmen 6 heraustritt und sich als noch ungespannte Schlinge um das Objekt 4 herumlegt. Anschließend erfolgt mithilfe derOn the work table 2, a vertically standing tape guide frame 6 is arranged, with the aid of which the strap 7 can be guided around the object 4 on the work table 2 as a loose loop. For this purpose, the strapping band 7 stored on a side of the machine frame 1 on a supply spool not shown in more detail is injected into the band guide frame 6 forming the insertion path by the band drive means 5 shown only diagrammatically in FIG. 1 under the work table 2 by the welding head 3 of the strapping machine guided around this until it arrives in the welding head 3 again. The detector arranged there at the end of the insertion path in the form of a limit switch 16 detects the orderly arrival of the strapping band seven. Whose end of the tape is fixed there and the strapping 7 then retrieved using the tape drive means 5, wherein it emerges from the tape guide frame 6 and puts itself around the object 4 as a still unstressed loop. Subsequently, using the
Bandantriebseinrichtung 5 die Rückspannung des Bands, das damit fest um das Objekt 4 herumgelegt ist. Die im Schweißkopf 3 überlappenden Bandlagen werden beispielsweise thermisch verschweißt und die so gebildete Umreifung vom herangeführten Umreifungsband abgetrennt. Das Objekt 4 ist damit umreift und kann abtransportiert werden. Tape drive device 5, the return voltage of the tape, which is thus wrapped around the object 4. The band layers overlapping in the welding head 3 are thermally welded, for example, and the strapping thus formed is separated from the strapping band brought up. The object 4 is thus strapped and can be removed.
Anhand von Fig. 2 ist der Aufbau der Bandantriebseinrichtung 5 zu erläutern. Die grundsätzlichen Baugruppen sind zum einen die Einschieß- Rückhol-Einheit 8 und zum anderen die Rückspanneinheit 9, die die vor- stehend erörterten Bandmanipulationen entsprechend ihrer Bezeichnung durchführen. 2, the structure of the tape drive device 5 is to be explained. The basic assemblies are, on the one hand, the insertion-return unit 8 and, on the other hand, the return clamping unit 9, which Perform banded manipulations as described.
Zur Bildung eines definierten Transportwegs für das Umreifungsband 7 durch die Bandantriebseinrichtung 5 sind Führungskanalabschnitte 10, 1 1, 12 vorgesehen. Ein erster Führungskanalabschnitt 10 führt dabei das Umreifungsband 7 von Vorratsrolle oder Zwischenspeicher (jeweils nicht dargestellt) ankommend zur Rückspann-Einheit 9. Ein zweiter Führungskanalabschnitt 1 1 verbindet die Rückspann-Einheit 9 und die Einschieß- Rückhol-Einheit 8. Ein letzter Führungskanalabschnitt 12 führt von der Einschieß-Rückhol-Einheit 8 weg in Richtung zum Schweißkopf 3 und zum Eintrittspunkt des Umreifungsbands 7 in den Bandführungsrahmen 6. To form a defined transport path for the strapping 7 by the belt drive means 5 guide channel sections 10, 1 1, 12 are provided. A first guide channel section 10 leads the strap 7 of supply roll or buffer (not shown) arriving to the return unit 9. A second guide channel section 1 1 connects the return unit 9 and the Einschieß- return unit 8. A last guide channel section 12 leads from the insertion-return unit 8 toward the welding head 3 and the entry point of the strap 7 in the tape guide frame. 6
Die Einschieß-Rückhol-Einheit 8 weist ein Antriebsrollenpaar 13 mit einer von einem Motor (nicht dargestellt) angetriebenen Rolle 14 und eine nicht angetriebene Andruckrolle 15 auf. The Einschieß-retrieval unit 8 has a drive roller pair 13 with a by a motor (not shown) driven roller 14 and a non-driven pressure roller 15.
Zum Einschießen des Umreifungsbandes 7 wird über die Ansteuerung des Antriebsmotors durch eine Steuereinheit (nicht dargestellt) die Rolle 14 des Antriebsrollenpaars 13 in der entsprechenden Richtung in Umlauf gesetzt und das Umreifungsband 7 im Bandführungsrahmen 6 herumgeführt, bis sein voreilendes Ende 40 unter Erfassung durch den Endschalter 16 im Bereich des Schweißkopfes 3 zu liegen kommt und dort fixiert wird. Anschließend wird das Antriebsrollenpaar 13 in entgegengesetzter Richtung aktiviert und dadurch das Umreifungsband 7 wie oben beschrieben zurückgeholt, bis es im Wesentlichen ohne Spannung um das zu umreifende Objekt 4 herum gelegt ist. Die Rückspann-Einheit 9 weist ein Spannrollenpaar 17 mit miteinander koppelbaren Rollen 18, 19 auf, das mit Hilfe seines Antriebsmotors (nicht dargestellt) anschließend eine hohe Zugkraft zur Rückspannung des Umrei- fungsbandes 7 um das zu umreifende Objekt 4 aufbringt. To shoot the strapping 7 (not shown) by the control of the drive motor, the roller 14 of the drive roller pair 13 in circulation in the appropriate direction and circumscribed the strap 7 in the tape guide frame 6 until its leading end 40 under detection by the limit switch 16 comes to lie in the region of the welding head 3 and is fixed there. Subsequently, the drive roller pair 13 is activated in the opposite direction and thereby the strap 7 retrieved as described above until it is placed around the object to be strapped substantially without tension around. The back tensioning unit 9 has a pair of tensioning rollers 17 with rollers 18, 19 which can be coupled to one another and then, by means of its drive motor (not shown), subsequently apply a high tensile force to the return tension of the strapping belt 7 around the object 4 to be strapped.
Die Führungskanalabschnitte 10, 1 1 sind gemeinsam durch über die Rollen 18, 19 hinweggeführte, stegförmige Wangen 20, 21 gebildet, die über abstehende Haltefüße 22, 23 in noch näher zu erläuternder Weise in der Bandantriebseinrichtung 5 fixiert sind. Die Rollen 18, 19 greifen durch in der Zeichnung nicht näher erkennbare Aussparungen in den Wangen 20, 21 hindurch. The guide channel sections 10, 11 are jointly formed by web-shaped cheeks 20, 21 guided over the rollers 18, 19, which are fixed in the tape drive device 5 via projecting support feet 22, 23 in a manner to be explained in more detail. The rollers 18, 19 engage in the drawing not closer to recognizable recesses in the cheeks 20, 21 therethrough.
Der Führungskanalabschnitt 12 ist ebenfalls von beiderseitigen Wangen 24, 25 gebildet, wobei die eine Wange 24 durch die Seitenfläche eines in Draufsicht etwa T-förmigen, prismatischen Körpers 26 gebildet ist. Die andere Wange 25 ist in einem gekrümmten Abschnitt entsprechend dem Außenumfang der Rolle 14 über einen Umschlingungswinkel für das Um- reifungsband 7 gebogen ausgebildet und setzt sich in einem geraden Abschnitt fort. Sie ist an einem entsprechenden, langgestreckten prismatischen Körper 27 als Seitenfläche ausgebildet. The guide channel portion 12 is also formed by mutual cheeks 24, 25, wherein the one cheek 24 is formed by the side surface of a prismatic body 26 approximately T-shaped in plan view. The other cheek 25 is bent in a curved portion corresponding to the outer periphery of the roller 14 through a wrap angle for the curling belt 7 and continues in a straight portion. It is formed on a corresponding, elongated prismatic body 27 as a side surface.
Im Folgenden wird der eingangs angesprochene Fehlerfall anhand des Ausführungsbeispiels näher erläutert. Auslöser ist die Tatsache, dass mit Ablauf der für das Einschießen des Umreifungsbandes 7 in der Maschinen- Steuerung definierten Zeit von beispielsweise 0,2 s der Endschalter 16 nicht anspricht. Dies ist ein Signal dafür, dass das Umreifungsband 7 mit seinem voreilenden Ende 40 den Schweißkopf 3 fehlerhaft nicht erreicht hat. Aufgrund dieser Fehlererkennung wird die Einschieß-Rückhol-Einheit 8 so aktiviert, dass mit einer deutlich geringeren Rückhol-Geschwindigkeit, als beim Einschießen das Umreifungsband 7 entgegen der Einschießrichtung E rückwärts transportiert wird. Die Rückhol-Zeit ist dabei so definiert, dass mit Sicherheit das Umreifungsband 7 komplett aus dem Einschießweg und der Einschieß-Rückhol-Einheit 8 herausgezogen ist. Damit bleibt das Um- reifungsband 7 mit seinem voreilenden Ende 40 zwischen dieser und der Rückspann-Einheit 9 stehen. The error case mentioned at the outset will be explained in more detail below with reference to the exemplary embodiment. The trigger is the fact that with the end of the defined for the insertion of the Umreifungsbandes 7 in the machine control time of, for example, 0.2 s, the limit switch 16 does not respond. This is a signal that the strapping 7 with its leading end 40 has not reached the welding head 3 faulty. Due to this error detection the Einschieß-retrieval unit 8 is activated so that with a much lower return speed than when shooting the strapping 7 is transported against the Einschießrichtung E backwards. The return time is defined so that with certainty the strapping 7 is completely pulled out of the Einschießweg and Einschieß-return unit 8. Thus, the strapping band 7 with its leading end 40 remains between it and the back tension unit 9.
Die Rückhol-Zeit kann im übrigen auch durch eine Art selbstlernendes System variabel definiert werden, indem die Rückhol-Zeit durch eine Ab- leitung der benötigten Zeit aus dem vorangegangenen Einschuss in direkter Proportionalität zur verminderten Rückholgeschwindigkeit ermittelt wird. Incidentally, the return time can also be defined variably by a type of self-learning system in that the return time is determined by deriving the required time from the previous shot in direct proportionality to the reduced return speed.
Die nicht näher dargestellte Steuerung der Umreifungsmaschine aktiviert dann die Rückspann-Einheit 9 entgegen ihrer üblichen Rückspannrichtung, die der Einschießrichtung E entgegen gerichtet ist. Dazu wird die Rolle 18 des Spannrollenpaars 17 entgegen dem Uhrzeigersinn in Drehung versetzt, sodass das Umreifungsband 7 wieder in Einschussrichtung E aus der in Fig. 3 gezeigten Position nach oben in dem Rollenspalt des Antriebsrollenpaars 13 der Einschieß-Rückkehr-Einheit 8 transportiert wird. Diese nimmt das voreilende Ende 40 des Umreifungsbands 7 wieder auf. Durch eine entsprechende Betätigung der Antriebsrolle 14 der Einschieß-Rückhol- Einheit 8 wird das Umreifungsband 7 neuerlich in den Bandführungsrahmen 6 eingeschossen. Dabei kann der Antrieb der Rückspann-Einheit 9 wieder außer Kraft gesetzt werden. The control of the strapping machine, not shown, then activates the back tension unit 9 against its usual back tensioning direction, which is directed counter to the insertion direction E. For this purpose, the roller 18 of the tensioning roller pair 17 is rotated in the counterclockwise direction, so that the strapping 7 is again transported in the insertion direction E from the position shown in Fig. 3 upwards in the roller gap of the drive roller pair 13 of the Einschieß-return unit 8. This takes up the leading end 40 of the strap 7 again. By a corresponding actuation of the drive roller 14 of the insertion-return unit 8, the strapping 7 is again injected into the tape guide frame 6. In this case, the drive of the back tension unit 9 can be overridden again.

Claims

Patentansprüche claims
1. Verfahren zum Ansteuern der Bandantriebseinrichtung einer Umrei- fungsmaschine bei Bandverlust, wobei die Umreifungsmaschine um- fasst: 1. A method for driving the belt drive device of a strapping machine in the event of belt loss, the strapping machine comprising:
- eine Einschieß- ückhol-Einheit (8) mit mindestens einem ersten Paar von Rollen (13), zwischen denen das Umreifungsband (7) von mindestens einer der Rollen (14) in und entgegen der Einschießrichtung (E) des Umreifungsbandes (7) antreibbar hindurchgeführt ist, - einen Detektor (16) zur Erfassung des voreilenden Bandendes (40) am Ende des Einschießweges, und  - A Einschieß- Rückhol-unit (8) with at least a first pair of rollers (13), between which the strap (7) of at least one of the rollers (14) in and against the Einschießrichtung (E) of the strap (7) drivable a detector (16) for detecting the leading end of tape (40) at the end of Einschießweges, and
- eine bezogen auf die Einschießrichtung (E) hinter der Einschieß- Rückhol-Einheit (8) angeordnete Rückspann-Einheit (9) mit einem zweiten Paar (17) von Rollen (18, 19), zwischen denen das Umrei- fungsband (7) von mindestens einer der Rollen (18) entgegen der - A with respect to the Einschießrichtung (E) behind the Einschieß- retrieval unit (8) arranged Rückspann unit (9) with a second pair (17) of rollers (18, 19), between which the Umrei- tion belt (7) of at least one of the rollers (18) against the
Einschießrichtung (E) um das zu umreifende Gut (4) in der Umreifungsmaschine spannbar ist, Einschießrichtung (E) around the material to be strapped (4) in the strapping machine is tensioned,
gekennzeichnet durch folgende Verfahrensschritte:  characterized by the following process steps:
- Abfragen des Detektors (16) auf ordnungsgemäßes Einschießen des Umreifungsbandes (7) in Einschießrichtung (E) bis zum Ende des - Querying the detector (16) for proper shooting of the strapping (7) in the insertion direction (E) to the end of the
Einschießweges, Einschießweges,
- bei nicht-ordnungsgemäßem Einschießen des Umreifungsbandes (7) Aktivieren der Einschieß-Rückhol-Einheit (8) zum Rückholen des Umreifungsbandes (7) mit einer definierten Rückhol- Geschwindigkeit über eine definierte Rückhol-Zeit derart, dass das - In case of improper insertion of the strapping band (7) activating the Einschieß-retrieval unit (8) for retrieving the strapping band (7) with a defined return speed over a defined return time such that the
Umreifungsband (7) entgegen der Einschießrichtung (E) aus der Einschieß-Rückhol-Einheit (8) ausgetreten ist, und Strapping band (7) against the Einschießrichtung (E) from the Einschieß-retrieval unit (8) has leaked, and
- Ansteuern des Antriebs der Rückspann-Einheit (9) derart, dass die Rückspann-Einheit (9) das Umreifungsband (7) in Einschießrich- tung (E) in die Einschieß-Rückhol-Einheit (8) zurücktransportiert. - Driving the drive of the Rückspann unit (9) such that the Rückspann unit (9) the strapping band (7) in Einschießrich- tion (E) in the Einschieß-retrieval unit (8) transported back.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der in Einschießrichtung (E) stattfindende Rücktransport des Umreifungsbandes (7) in die Einschieß-Rückhol-Einheit (8) unterbrochen wird, sobald das Umreifungsband (7) in deren Antriebsrollenpaar (13) eingefädelt ist. 2. The method according to claim 1, characterized in that in Einschießrichtung (E) taking place taking place of the Umreifungsbandes (7) in the Einschieß-return unit (8) is interrupted as soon as the strapping (7) in the drive roller pair (13) threaded is.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die3. The method according to claim 1 or 2, characterized in that the
Rückhol-Geschwindigkeit einem Bruchteil der Einschieß- Geschwindigkeit beträgt. Return rate is a fraction of the insertion speed.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass die Rückhol-Geschwindigkeit maximal 50%%, vorzugsweise 10 % bis 20 % der Einschieß-Geschwindigkeit beträgt. 4. The method according to claim 3, characterized in that the return speed is at most 50 %%, preferably 10% to 20% of the Einschieß speed.
5. Verfahren nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass die definierte Rückholzeit in einem Selbstlernprozess aus der Einschießzeit des Umreifungsbandes (7) eines oder mehrerer der vorangegangenen Einschüsse variabel abgeleitet wird. 5. The method according to any one of the preceding claims, characterized in that the defined return time is derived variably in a self-learning process from the Einschießzeit the Umreifungsbandes (7) of one or more of the previous Einschüsse.
6. Umreifungsmaschine mit einer Bandantriebseinrichtung, umfassend6. strapping machine with a belt drive device, comprising
- eine Einschieß-Rückhol-Einheit (8) mit mindestens einem ersten Paar von Rollen (13), zwischen denen das Umreifungsband (7) von mindestens einer der Rollen (14) in und entgegen der Einschießrichtung (E) des Umreifungsbandes (7) antreibbar hindurchgeführt ist,- A Einschieß-return unit (8) with at least a first pair of rollers (13), between which the strap (7) of at least one of the rollers (14) in and against the Einschießrichtung (E) of the strap (7) drivable passed through,
- einen Detektor (16) zur Erfassung des voreilenden Bandendes (40) am Ende des Einschießweges, und - A detector (16) for detecting the leading end of the tape (40) at the end of Einschießweges, and
- eine bezogen auf die Einschießrichtung (E) hinter der Einschieß- Rückhol-Einheit (8) angeordnete Rückspann-Einheit (9) mit einem zweiten Paar (17) von Rollen (18, 19), zwischen denen das Umrei- fungsband (7) von mindestens einer der Rollen (18) entgegen der Einschießrichtung (E) um das zu umreifende Gut (4) in der Umrei- fungsmaschine spannbar ist, - One with respect to the Einschießrichtung (E) behind the Einschieß- retrieval unit (8) arranged Rückspann unit (9) with a second pair (17) of rollers (18, 19), between which the strapping band (7) of at least one of the rollers (18) against the Einschießrichtung (E) around the material to be strapped (4) in the strapping machine tensioned is
dadurch gekennzeichnet, dass die Bandantriebseinrichtung derart ansteuerbar ist, dass  characterized in that the tape drive means is controllable such that
- der Detektor (16) auf ordnungsgemäßes Einschießen des Umrei- fungsbandes (7) in Einschießrichtung (E) bis zum Ende des Einschießweges abfragbar ist,  the detector (16) can be interrogated for proper shooting in of the strapping belt (7) in the insertion direction (E) until the end of the insertion path,
- bei nicht-ordnungsgemäßem Einschießen des Umreifungsbandes (7) die Einschieß-Rückhol-Einheit (8) zum Rückholen des Umreifungsbandes (7) mit einer definierten Rückhol-Geschwindigkeit über eine definierte Rückhol-Zeit so aktivierbar ist, dass das Umreifungsband (7) entgegen der Einschießrichtung (E) aus der Einschieß-Rückhol- Einheit (8) ausgetreten ist, und  - In case of improper insertion of the strapping (7) the Einschieß-return unit (8) for retrieving the strapping (7) with a defined return speed over a defined return time is activated so that the strapping (7) against the Einschießrichtung (E) from the Einschieß-return unit (8) has leaked, and
- der Antrieb der Rückspann-Einheit (9) so ansteuerbar ist, dass das Umreifungsband (7) mittels der Rückspann-Einheit (9) in Einschießrichtung (E) in die Einschieß-Rückhol-Einheit (8) zurücktranspor- tierbar ist.  - The drive of the Rückspann unit (9) is controlled so that the strap (7) by means of the Rückspann unit (9) in Einschießrichtung (E) in the Einschieß-return unit (8) is zurücktranspor- tierbar.
7. Umreifungsmaschine nach Anspruch 6, dadurch gekennzeichnet, dass der in Einschießrichtung (E) stattfindende Rücktransport des Umreifungsbandes (7) in die Einschieß-Rückhol-Einheit (8) unterbrechbar ist, sobald das Umreifungsband (7) in deren Antriebsrollenpaar (13) eingefädelt ist. 7. strapping machine according to claim 6, characterized in that in Einschießrichtung (E) occurring return transport of the Umreifungsbandes (7) in the Einschieß-return unit (8) is interrupted as soon as the strapping band (7) threaded in the drive roller pair (13) is.
8. Umreifungsmaschine nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Rückhol-Geschwindigkeit einem Bruchteil der Einschieß- Geschwindigkeit beträgt. 8. strapping machine according to claim 6 or 7, characterized in that the return speed a fraction of the Einschieß- Speed is.
9. Umreifungsmaschine nach Anspruch 8, dadurch gekennzeichnet, dass die ückhol-Geschwindigkeit maximal 50 %, vorzugsweise 10 % bis 20 % der Einschieß-Geschwindigkeit beträgt. 9. strapping machine according to claim 8, characterized in that the return speed is a maximum of 50%, preferably 10% to 20% of the Einschieß speed.
10. Umreifungsmaschine nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass die definierte Rückholzeit in einem Selbstlernpro- zess aus der Einschießzeit des Umreifungsbandes (7) eines oder mehre - rer der vorangegangenen Einschüsse variabel abgeleitet wird. 10. strapping machine according to one of claims 6 to 9, characterized in that the defined return time is derived variably in a Selbstlernpro- process from the Einschießzeit the strapping band (7) one or more of the previous Einschüsse.
EP12719363.9A 2011-05-11 2012-05-02 Method for actuating the band driving device of a strapping machine Active EP2707288B1 (en)

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US20140083310A1 (en) 2014-03-27
WO2012152626A2 (en) 2012-11-15
DE102011075629B4 (en) 2016-09-15
US11597546B2 (en) 2023-03-07
EP2707288B1 (en) 2019-04-17
DE102011075629A1 (en) 2012-11-15
US20190256232A1 (en) 2019-08-22
WO2012152626A3 (en) 2013-01-10
PL2707288T3 (en) 2019-12-31
US10322830B2 (en) 2019-06-18

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