EP0625464B1 - End securing device for bands - Google Patents

End securing device for bands Download PDF

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Publication number
EP0625464B1
EP0625464B1 EP94101446A EP94101446A EP0625464B1 EP 0625464 B1 EP0625464 B1 EP 0625464B1 EP 94101446 A EP94101446 A EP 94101446A EP 94101446 A EP94101446 A EP 94101446A EP 0625464 B1 EP0625464 B1 EP 0625464B1
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EP
European Patent Office
Prior art keywords
closure
drive shaft
clamping
closure device
cutters
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94101446A
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German (de)
French (fr)
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EP0625464A2 (en
EP0625464A3 (en
Inventor
Gerd Bartzick
Gerd Bühne
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.)
Titan Umreifungstechnik GmbH and Co KG
Original Assignee
Fried Krupp AG Hoesch Krupp
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Publication of EP0625464A2 publication Critical patent/EP0625464A2/en
Publication of EP0625464A3 publication Critical patent/EP0625464A3/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
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/24—Securing ends of binding material
    • B65B13/30—Securing ends of binding material by deforming the overlapping ends of the strip or band

Definitions

  • the invention relates to a closure device on a packaging machine for steel strapping with an upper part above the channel section provided for the formation of the closure, the upper knife containing punching dies, a clamping stamp and a cutting knife, and a lower section lying below the channel section in the form of a base plate, on which the upper knife Stamp aligned lower knife are attached, and the housing of the upper part is fixedly connected to the base plate and is pivotable about an axis parallel to the longitudinal direction of the strapping channel, which is also the drive shaft for driving the punch containing the upper knife.
  • a generic device is known from the prior art according to US-A-3 804 001.
  • a disadvantage of the upper and lower knives mounted on a common pivotable housing is the more complicated one Design of the drives for the upper knives and the clamping and cutting devices that have to be divided or separated during the swiveling movement.
  • pivot axis forms the drive shaft for driving the pivoting device of the closure device.
  • the back and forth movements of the upper knives, clamping and cutting devices are generated by cams, cranks or eccentrics located on the drive shaft. It is particularly easy to mount eccentrics on the drive shaft, to which crank arms are attached.
  • the eccentric discs 2, 3 and 4 are placed on the drive shaft 1 and drive the upper cutters 5, 6 and 7 via crank arms.
  • the base plate 8 is located below the upper knife.
  • the base plate 8 is firmly connected to the pivotable part 9 of the housing.
  • the non-pivotable part 10 of the housing is on the right side in FIG. 2. In the closed state, the base plate 8 is supported with the nose 11 on an extension 12 of the non-pivotable part 10 of the housing. 3, the pivotable part 9 of the housing is pivoted out.
  • the base plate 8 is thereby pivoted out of the gap between the package 13 and the finished closure, so that the strapped package 13 can be transported further and a new package to be strapped can be brought into the strapping position.
  • the upper knife 5 When the drive shaft rotates, the upper knife 5 first cuts a closure into the packing tape 14. In addition, this upper knife 5 has a double function. The band tension is fixed with a clamping edge which presses on the tightened packing tape after the closure has been cut and which sits on the upper knife 5. Then the part of the packing tape running from the tensioning device to the closure part is relaxed and cut through the upper knife 6, so that thereafter there is no longer any connection with the tape of the supply roll 15. When the upper knife 6 is lowered further, the second closure is punched through it. The upper knife 6 thus performs the double functions, cutting and closing instances. Then the upper knife 6 is raised and shortly thereafter the upper knife 5, so that its clamping action is also canceled.
  • the one rotation of the drive shaft 1 necessary for the formation of the closure does not take place continuously. There are also short breaks. A pause is necessary so that a new packing tape 14, the course of which is indicated by line 21, can be inserted into the strapping channel for the new package 13 to be strapped.
  • the drive shaft 1 starts after the signal from a switch (not shown), which signals the arrival of the start of the strap in the strapping position after the strapping channel has been completely filled by the packing strap 14.
  • the drive shaft rotates slightly, for example by 30 °, and is then stopped. During this slight rotation, the clamping device 22 is closed by the cam disk 23 located on the drive shaft.
  • the packing tape 14 thus introduced and clamped at the beginning of the tape by the clamping device 22 is applied and tensioned to the package 13 in a known manner by the return of the feed device and by the tensioning device.
  • the further rotation of the drive shaft is only started when the tensioning process is complete. This start is e.g. by a known switch (not shown) on the tensioning device, which switches off the motor of the tensioning device as a function of the tension reached in the packing tape and simultaneously switches on the motor for the drive shaft 1.
  • the drive shaft 1 now rotates about 50 ° until the next stop, as a result of which the first knife is punched by the upper knife 5.
  • a clamp is attached to the upper knife 5, which clamps and holds the packing tape 14 shortly before punching.
  • the tensioning motor is then run slightly backwards.
  • the packing tape 14 lying between the clamp on the upper knife 5 and the supply roll 15 is relaxed by any tension.
  • the subsequent punchings and the cutting off of the packing tape 14 are now carried out on a part of the packing tape which has been released from any tensile stresses.
  • the packing tape 14 is separated from the supply roll 15 by a cutter located on the upper knife 6 and the second punching of the closure is effected by the upper knife 6 and then the upper knives 5 and 6 are lifted, so that they are below the upper knife 5 and 6 lying closures by the resilient force of the packing tape 14 lying around the packing tape 14.
  • the punching is carried out with the upper knife 7. This stamping has a special known safety cone, so that the closure cannot be opened by pushing it back.
  • the clamping device 22 is first released through the cam disc and the housing is swung open at approximately 310 ° and the drive shaft 1 is held. The strapped package 13 is transported further.
  • the eccentric drive cannot hold the clamping effect for a long time.
  • the clamping force is derived from a cam plate 23 fastened on the drive shaft 1. This cam disk 23 presses directly on the clamping device 22 and holds it in the clamping position during the first approximately 240 ° of the rotation of the drive shaft.
  • the clamping device 22 is withdrawn by a spring (not shown).
  • the specified rotation angles at which the drive shaft 1 is stopped are not limited to the specified angles and can deviate considerably from these. It is only essential that all the necessary functions have been carried out in one revolution and that a new package can be strapped with the next revolution.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Package Closures (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Description

Die Erfindung betrifft eine Verschlußeinrichtung an einer Verpackungsmaschine für Stahlbandumreifungen mit oberhalb des für die Verschlußbildung vorgesehenen Kanalabschnittes liegendem Oberteil, das Obermesser an Stanzstempeln, einen Klemmstempel und ein Abschneidmesser enthält, und unterhalb des Kanalabschnittes liegendem Unterteil in Form einer Grundplatte, an der auf die Obermesser der Stanzstempel ausgerichtete Untermesser befestigt sind, und das Gehäuse des Oberteils fest mit der Grundplatte verbunden ist und um eine parallel zur Längsrichtung des Umreifungskanals verlaufende Achse schwenkbar ist, die gleichzeitig die Antriebswelle für den Antrieb der die Obermesser enthaltenden Stempel ist. Eine gattungsgemäße Vorrichtung ist durch den Stand der Technik nach der US-A-3 804 001 bekannt geworden.The invention relates to a closure device on a packaging machine for steel strapping with an upper part above the channel section provided for the formation of the closure, the upper knife containing punching dies, a clamping stamp and a cutting knife, and a lower section lying below the channel section in the form of a base plate, on which the upper knife Stamp aligned lower knife are attached, and the housing of the upper part is fixedly connected to the base plate and is pivotable about an axis parallel to the longitudinal direction of the strapping channel, which is also the drive shaft for driving the punch containing the upper knife. A generic device is known from the prior art according to US-A-3 804 001.

Bei bekannten Verpackungsmachinen muß nach der Fertigstellung des Verschlusses mindestens die zwischen dem Verschluß und dem Packstück liegende Grundplatte seitlich herausgezogen werden, um danach das umreifte Packstück weiter transportieren zu können. Durch das Herausziehen und wieder Zurückschieben nur der Grundplatte entstehen Ungenauigkeiten im Schnittspalt durch Abnutzung der Führungen oder auch wenn sich Schmutz an den Anschlägen absetzt. Diese Ungenauigkeiten führen dazu, daß sich der Schneidspalt zwischen dem Obermesser und dem Untermesser vergrößert, wodurch die Messer sehr schnell abgenutzt werden. Dieser Nachteil wurde bei einer bekannten Konstruktion dadurch beseitigt, daß die Obermesser und die Untermesser an einem Gehäuseteil angebaut sind, daß vom Kanalabschnitt wegschwenkbar eingebaut ist, so daß auch während des Schwenkvorganges die relative Lage von Obermesser und zugehörigen Untermesser zueinander erhalten bleibt.In known packaging machines, after the closure has been completed, at least the base plate located between the closure and the package must be pulled out laterally so that the strapped package can then be transported further. Pulling out and pushing back only the base plate creates inaccuracies in the cutting gap due to wear of the guides or even if dirt settles on the stops. These inaccuracies mean that the cutting gap between the upper knife and the lower knife increases, as a result of which the knives wear out very quickly. This disadvantage was eliminated in a known construction in that the upper knives and the lower knives are attached to a housing part, that is pivotally installed away from the channel section, so that the relative position of the upper knife and associated lower knife relative to one another is maintained even during the pivoting process.

Ein Nachteil der an einem gemeinsamen schwenkbaren Gehäuse angebauten Ober- und Untermesser besteht in der komplizierteren Bauart der Antriebe für die Obermesser und die Klemm- und Abschneideinrichtungen, die während der Schwenkbewegung geteilt bzw. getrennt werden müssen.A disadvantage of the upper and lower knives mounted on a common pivotable housing is the more complicated one Design of the drives for the upper knives and the clamping and cutting devices that have to be divided or separated during the swiveling movement.

Es ist die Aufgabe der Erfindung die Antriebe für an einem gemeinsamen schwenkbaren Gehäuse angebaute Ober- und Untermesser zu vereinfachen, wobei der Vorteil bezüglich des Schneidspaltes zwischen Ober- und Untermesser erhalten bleiben soll.It is the object of the invention to simplify the drives for the upper and lower knives mounted on a common pivotable housing, the advantage with regard to the cutting gap between the upper and lower knives being retained.

Diese Aufgabe wird dadurch gelöst, daß die Schwenkachse die Antriebswelle für den Antrieb der Schwenkeinrichtung der Verschlußeinrichtung bildet. Die hin- und hergehenden Bewegungen der Obermesser, Klemm- und Abschneideinrichtungen werden durch an der Antriebswelle sitzende Nocken, Kurbeln oder Exzenter erzeugt. Es ist besonders einfach die Anbringung von Exzentern auf der Antriebswelle herzustellen, an die Kurbelschwingen angebaut sind.This object is achieved in that the pivot axis forms the drive shaft for driving the pivoting device of the closure device. The back and forth movements of the upper knives, clamping and cutting devices are generated by cams, cranks or eccentrics located on the drive shaft. It is particularly easy to mount eccentrics on the drive shaft, to which crank arms are attached.

Durch eine versetzte Anbringung der Exzenter bezüglich der Drehrichtung wird die notwendige zeitliche Reihenfolge der anzutreibenden Teile erreicht. Weiterbildungen der Erfindung sind in den Unteransprüchen 2 bis 8 beschrieben. Ein Ausführungsbeispiel der Erfindung wird mit Hilfe der Fig. 1 bis 4 näher erläutert.The necessary chronological order of the parts to be driven is achieved by an offset attachment of the eccentrics with respect to the direction of rotation. Further developments of the invention are described in subclaims 2 to 8. An embodiment of the invention is explained in more detail with the aid of FIGS. 1 to 4.

Es zeigen:

Fig. 1
die Verschlußeinrichtung mit Antriebswelle,
Fig. 2
das Gehäuse mit feststehenden und schwenkbaren Teil mit Exzenter, Kurbelschwinge, Obermesser und Untermesser im geschlossenen Zustand,
Fig. 3
wie Fig. 2, jedoch im ausgeschwenkten Zustand und
Fig. 4
den Antrieb für die Schwenkbewegung des Gehäuses.
Show it:
Fig. 1
the locking device with drive shaft,
Fig. 2
the housing with fixed and swiveling part with eccentric, crank arm, upper knife and lower knife when closed,
Fig. 3
as Fig. 2, but in the swung-out state and
Fig. 4
the drive for the pivoting movement of the housing.

Auf die Antriebswelle 1 sind die Exzenterscheiben 2,3 und 4 aufgesetzt, die über Kurbelschwingen die Obermesser 5,6 und 7 antreiben. Unterhalb der Obermesser befindet sich die Grundplatte 8. Die Grundplatte 8 ist fest mit dem schwenkbaren Teil 9 des Gehäuses verbunden. Der nicht schwenkbare Teil 10 des Gehäuses befindet in der Fig. 2 auf der rechten Seite. Im geschlossenen Zustand stützt sich die Grundplatte 8 mit der Nase 11 an einer Verlängerung 12 des nicht schwenkbaren Teils 10 des Gehäuses ab. In der Fig. 3 ist der schwenkbare Teil 9 des Gehäuses ausgeschwenkt. Die Grundplatte 8 wird dadurch aus dem Spalt zwischen dem Packstück 13 und dem fertigen Verschluß herausgeschwenkt, so daß das umreifte Packstück 13 weiter transportiert werden kann und ein neues noch zu umreifendes Packstück in die Umreifungsposition gebracht werden kann.The eccentric discs 2, 3 and 4 are placed on the drive shaft 1 and drive the upper cutters 5, 6 and 7 via crank arms. The base plate 8 is located below the upper knife. The base plate 8 is firmly connected to the pivotable part 9 of the housing. The non-pivotable part 10 of the housing is on the right side in FIG. 2. In the closed state, the base plate 8 is supported with the nose 11 on an extension 12 of the non-pivotable part 10 of the housing. 3, the pivotable part 9 of the housing is pivoted out. The base plate 8 is thereby pivoted out of the gap between the package 13 and the finished closure, so that the strapped package 13 can be transported further and a new package to be strapped can be brought into the strapping position.

Bei einer Umdrehung der Antriebswelle schneidet zuerst das Obermesser 5 einen Verschluß in das Packband 14 ein. Außerdem übt dieses Obermesser 5 eine Doppelfunktion aus. Mit einer nach dem Einschneiden des Verschlusses auf das gestraffte Packband drückenden Klemmkante die am Obermesser 5 sitzt wird die Bandspannung fixiert. Anschließend wird der von der Spannvorrichtung zum Verschlußteil laufende Teil des Packbandes entspannt und durch das Obermesser 6 durchgeschnitten, so daß danach keine Verbindung mehr mit dem Band der Vorratsrolle 15 besteht. Bei einem weiteren Absenken des Obermessers 6 wird durch dieses der zweite Verschluß eingestanzt. Das Obermesser 6 übt somit die doppelten Funktionen, Abschneiden und Verschlußeinstanzen aus. Anschließend wird das Obermesser 6 angehoben und kurz danach das Obermesser 5, so daß auch dessen Klemmwirkung aufgehoben wird. Jetzt ziehen sich die Verschlußelemente von beiden Verschlüssen durch die federnde Wirkung des Packstückes 13 fest ineinander. Sollte die federnde Wirkung des Packstückes 13 einmal entfallen, so könnte sich der Verschluß wieder lösen. Um das zu verhindern, schneidet jetzt das Obermesser 7 noch ein Verschlußelement mit Öffnungssicherung in die überlappten Enden des Packbandes ein.When the drive shaft rotates, the upper knife 5 first cuts a closure into the packing tape 14. In addition, this upper knife 5 has a double function. The band tension is fixed with a clamping edge which presses on the tightened packing tape after the closure has been cut and which sits on the upper knife 5. Then the part of the packing tape running from the tensioning device to the closure part is relaxed and cut through the upper knife 6, so that thereafter there is no longer any connection with the tape of the supply roll 15. When the upper knife 6 is lowered further, the second closure is punched through it. The upper knife 6 thus performs the double functions, cutting and closing instances. Then the upper knife 6 is raised and shortly thereafter the upper knife 5, so that its clamping action is also canceled. Now the closure elements of both closures pull firmly into each other due to the resilient action of the package 13. If the resilient effect of the package 13 is omitted, the closure could loosen again. In order to prevent this, the upper knife 7 now cuts a closure element with opening security into the overlapped ends of the packing tape.

Nachdem dies geschehen ist und das Obermesser 7 genauso wie die Obermesser 6 und 5 wieder ihre obere Stellung erreicht haben, wird bei dem weiteren Verdrehen der Antriebswelle 1 der schwenkbare Teil des Gehäuses 9 entsprechend der Fig. 4 ausgeschwenkt. Dieses Ausschwenken geschieht dadurch, daß auf der Antriebswelle 1 ein Zahnrad 16 befestigt ist, das das Zahnrad 17 antreibt, an dem der Nocken 18 befestigt ist, der gegen die an dem schwenkbaren Teil des Gehäuses befestigten Rolle 19 anstößt, wodurch der schwenkbare Teil ausschwenkt und das Band auf das Packstück freigibt. Jetzt wird das umreifte Packstück 13 weitertransportiert. Bei der weiteren Drehung der Antriebswelle 1 verläßt der Nocken 18 die Rolle 19 und es wird durch die Feder 20 das ausgeschwenkte Teil 9 wieder eingeschwenkt. Die Antriebswelle 1 hat sich vom Beginn der Bewegung des Obermessers 5 bis zum Ende des Einschwenkens genau um eine Umdrehung weiter gedreht. Die Verschlußreinrichtung ist jetzt für eine weitere Umreifung bereit.After this has happened and the upper knife 7, like the upper knives 6 and 5, have reached their upper position again, when the drive shaft 1 is rotated further, the pivotable part of the housing 9 is pivoted out in accordance with FIG. 4. This pivoting is done in that a gear 16 is mounted on the drive shaft 1, which drives the gear 17 to which the cam 18 is fixed, which abuts against the roller 19 attached to the pivotable part of the housing, whereby the pivotable part pivots and releases the tape on the package. Now the strapped package 13 is transported on. With the further rotation of the drive shaft 1, the cam 18 leaves the roller 19 and the pivoted-out part 9 is pivoted in again by the spring 20. The drive shaft 1 has rotated exactly one revolution from the beginning of the movement of the upper knife 5 to the end of the pivoting. The closure device is now ready for further strapping.

Die zur Verschlußbildung notwendige eine Umdrehung der Antriebswelle 1 erfolgt nicht kontinuierlich. Es gibt auch kurze zeitliche Pausen. Eine Pause ist notwendig, damit für das neue zu umreifende Packstück 13 ein neues Packband 14 in den Umreifungskanal, dessen Verlauf durch die Linie 21 angedeutet ist, eingeführt werden kann. Der Start der Antriebswelle 1 erfolgt nach dem Signal eines nicht eingezeichneten Schalters, der die Ankunft des Bandanfanges in der Umreifungsposition meldet, nachdem der Umreifungskanal vom Packband 14 vollständig gefüllt worden ist.The one rotation of the drive shaft 1 necessary for the formation of the closure does not take place continuously. There are also short breaks. A pause is necessary so that a new packing tape 14, the course of which is indicated by line 21, can be inserted into the strapping channel for the new package 13 to be strapped. The drive shaft 1 starts after the signal from a switch (not shown), which signals the arrival of the start of the strap in the strapping position after the strapping channel has been completely filled by the packing strap 14.

Die Antriebswelle dreht sich nach dieser Meldung geringfügig, z.B. um 30° und wird dann angehalten. Bei dieser geringfügigen Drehung wird die Klemmeinrichtung 22 durch die auf der Antriebswelle befindliche Kurvenscheibe 23 geschlossen.After this message, the drive shaft rotates slightly, for example by 30 °, and is then stopped. During this slight rotation, the clamping device 22 is closed by the cam disk 23 located on the drive shaft.

Das so eingeführte und am Bandanfang durch die Klemmeinrichtung 22 eingeklemmte Packband 14 wird in bekannter Weise durch den Rücklauf der Zuführeinrichtung und durch die Spanneinrichtung an das Packstück 13 angelegt und gespannt. Es wird das weitere Drehen der Antriebswelle erst gestartet, wenn der Spannvorgang abgeschlossen ist. Dieser Start erfolgt z.B. durch einen nicht eingezeichneten bekannten Schalter an der Spanneinrichtung, der in Abhängigkeit von der im Packband erreichten Spannung den Motor der Spanneinrichtung abschaltet und den Motor für die Antriebswelle 1 gleichzeitig einschaltet. Die Antriebswelle 1 dreht jetzt bis zum nächsten Halt ca. 50° weiter, wodurch die erste Einstanzung eines Verschlusses durch das Obermesser 5 erfolgt. Am Obermesser 5 ist eine Klemme angebaut, die das Packband 14 schon kurz vor dem Stanzen festklemmt und festgeklemmt hält. Der Spannmotor wird anschließend geringfügig rückwärts laufen gelassen. Es wird dadurch von jeglicher Zugspannung das zwischen der Klemme am Obermesser 5 und der Vorratsrolle 15 liegende Packband 14 entspannt. Die nachfolgenden Einstanzungen und das Abschneiden des Packbandes 14 werden jetzt an einem von jeglichen Zugspannungen befreiten Teil des Packbandes ausgeführt.The packing tape 14 thus introduced and clamped at the beginning of the tape by the clamping device 22 is applied and tensioned to the package 13 in a known manner by the return of the feed device and by the tensioning device. The further rotation of the drive shaft is only started when the tensioning process is complete. This start is e.g. by a known switch (not shown) on the tensioning device, which switches off the motor of the tensioning device as a function of the tension reached in the packing tape and simultaneously switches on the motor for the drive shaft 1. The drive shaft 1 now rotates about 50 ° until the next stop, as a result of which the first knife is punched by the upper knife 5. A clamp is attached to the upper knife 5, which clamps and holds the packing tape 14 shortly before punching. The tensioning motor is then run slightly backwards. As a result, the packing tape 14 lying between the clamp on the upper knife 5 and the supply roll 15 is relaxed by any tension. The subsequent punchings and the cutting off of the packing tape 14 are now carried out on a part of the packing tape which has been released from any tensile stresses.

Beim weiteren Drehen der Antriebswelle wird durch eine am Obermesser 6 befindliche Schneide das Packband 14 von der Vorratsrolle 15 getrennt und es wird die zweite Einstanzung des Verschlusses durch das Obermesser 6 bewirkt und anschließend lüfteten die Obermesser 5 und 6, so daß sich die unterhalb der Obermesser 5 und 6 liegenden Verschlüsse durch die federnde Kraft des um das Packstück 13 liegenen Pckbandes 14 ineinanderziehen. Beim weiteren Drehen wir ddie Einstanzung mit dem Obermesser 7 ausgeführt. Diese Einstanzung besitzt einen besonderen bekannten Sicherungskonus, so daß sich der Verschluß nicht durch Rückschieben öffnen läßt. Beim weiteren Drehen, bei etwa 270° der Drehung von der Nullstellung aus gerechnet, wird erst die Klemmeinrichtung 22 durch die Kurvenscheibe gelüftet und bei etwa 310° wird das Gehäuse aufgeschwenkt und es erfolgt ein Halt der Antriebswelle 1. Das umreifte Packstück 13 wird weiter transportiert.When the drive shaft is turned further, the packing tape 14 is separated from the supply roll 15 by a cutter located on the upper knife 6 and the second punching of the closure is effected by the upper knife 6 and then the upper knives 5 and 6 are lifted, so that they are below the upper knife 5 and 6 lying closures by the resilient force of the packing tape 14 lying around the packing tape 14. When turning further, the punching is carried out with the upper knife 7. This stamping has a special known safety cone, so that the closure cannot be opened by pushing it back. When turning further, at about 270 ° Calculated rotation from the zero position, the clamping device 22 is first released through the cam disc and the housing is swung open at approximately 310 ° and the drive shaft 1 is held. The strapped package 13 is transported further.

Es erfolgt jetzt ein weiteres Drehen der Antriebswelle 1 bis 360° vom Anfang gerechnet und ein erneuter Halt, so daß alle Vorgänge für das erste Packstück von neuem beginnen können.There is now a further rotation of the drive shaft 1 to 360 ° from the beginning and a new stop, so that all operations for the first package can start again.

Das lange Halten der Klemmwirkung ist nicht über einen Exzenterantrieb möglich. Die Klemmkraft wird von einer auf der Antriebswelle 1 befestigten Kurvenscheibe 23 abgeleitet. Diese Kurvenscheibe 23 drückt direkt auf die Klemmeinrichtung 22 und hält diese während der ersten annähernd 240° der Umdrehung der Antriebswelle in der Klemmstellung. Das Zurücknehmen der Klemmeinrichtung 22 erfolgt durch eine nicht eingezeichnete Feder.The eccentric drive cannot hold the clamping effect for a long time. The clamping force is derived from a cam plate 23 fastened on the drive shaft 1. This cam disk 23 presses directly on the clamping device 22 and holds it in the clamping position during the first approximately 240 ° of the rotation of the drive shaft. The clamping device 22 is withdrawn by a spring (not shown).

Die angegebenen Umdrehungswinkel, bei denen die Antriebswelle 1 angehalten wird sind nicht auf die angegebenen Winkel beschränkt und können von diesen erheblich abweichen. Es ist nur wesentlich, daß bei einer Umdrehung alle notwendigen Funktionen ausgeführt worden sind und mit der nächsten Umdrehung ein neues Packstück umreift werden kann.The specified rotation angles at which the drive shaft 1 is stopped are not limited to the specified angles and can deviate considerably from these. It is only essential that all the necessary functions have been carried out in one revolution and that a new package can be strapped with the next revolution.

Claims (8)

  1. Closure device for a packaging machine for steel band hoops, having an upper part lying above the channel portion provided for the formation of the closure, which upper part contains upper cutters (5, 6, 7) on stamping punches, a clamping punch (22) and a cut-off knife, and having a lower part lying under the channel portion and in the form of a base plate (8) on which lower cutters, which are aligned with the upper cutters (5, 6, 7) of the stamping punches, are fixed and the housing of the upper part is firmly connected to the base plate (8) and is pivotable about an axis (1) extending parallel to the longitudinal direction of the hoop channel, which axis is at the same time the drive shaft (1) for the drive of the punches containing the upper cutters, characterised in that the pivot axis (1) forms the drive shaft (1) for the drive of the pivot device of the closure device.
  2. Closure device according to claim 1, characterised in that linear reciprocating movements for driving the stamping, cut-off and clamping tools are derived from the drive shaft (1), serving as a pivot axis, by means of cams, crankshafts and connecting rods or eccentric discs (2, 3, 4) with rocker linkage.
  3. Closure device according to claims 1 and 2, characterised in that the stamping (5, 6, 7), cut-off and clamping tools are connected to the eccentric discs (2, 3, 4) and to the rocker linkage in a form fit manner during the working stroke and during the return movement into the neutral position.
  4. Closure device according to claims 1 to 3, characterised in that the eccentric discs (2, 3, 4) are disposed off-set by a particular rotational angle on the drive shaft (1), and during a rotation of the drive shaft (1) all upper cutters (5, 6, 7) and the clamp, which is fixed to an upper cutter, and the cut-off knife carry out a working stroke and a return stroke into the neutral position.
  5. Closure device according to claims 1 to 4, characterised in that a toothed wheel (16) is fixed on the drive shaft (1), and engages with a second toothed wheel (17) of the same size or almost the same size, which lies under the drive shaft (1), and the second toothed wheel (17) is connected to a disc provided with a cam (18) and the cam (18) presses against the pivotable part (9) of the housing in the pivoted-out position against the force of a spring (20), opens it and holds it open.
  6. Closure device according to claims 1 to 5, characterised in that the pivotable part of the base plate (8) contains the lower cutters associated with the three upper cutters (5, 6, 7) and is of approximately the same size as the surface lying below the three upper cutters.
  7. Closure device according to claims 1 to 6, characterised in that a clamping device, which lies at the side of the closure-forming parts, from which the packing band extends from the packed item to these parts, goes into the clamping position earlier than the first closure-forming part cuts in and, immediately after the clamping but still prior to the cutting in the tensioning device relaxes the packing band by means of slight reverse operation.
  8. Closure device according to claims 1 to 6, characterised in that a clamping device which lies at the side of the closure-forming parts, from which the packing band extends from the packed item to these parts, goes into the clamping position earlier than the second closure-forming part in the sequence of operations cuts in and, immediately after clamping but still prior to the cutting in the tensioning device relaxes the packing band by means of a slight reverse operation.
EP94101446A 1993-04-26 1994-02-01 End securing device for bands Expired - Lifetime EP0625464B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4313641 1993-04-26
DE4313641A DE4313641A1 (en) 1993-04-26 1993-04-26 Locking device

Publications (3)

Publication Number Publication Date
EP0625464A2 EP0625464A2 (en) 1994-11-23
EP0625464A3 EP0625464A3 (en) 1994-12-28
EP0625464B1 true EP0625464B1 (en) 1997-08-27

Family

ID=6486411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94101446A Expired - Lifetime EP0625464B1 (en) 1993-04-26 1994-02-01 End securing device for bands

Country Status (6)

Country Link
US (1) US5501252A (en)
EP (1) EP0625464B1 (en)
CA (1) CA2119944C (en)
CZ (1) CZ288553B6 (en)
DE (2) DE4313641A1 (en)
ES (1) ES2064299T3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5715873A (en) * 1996-09-09 1998-02-10 Illinois Tool Works Inc. Method and apparatus for sealess retention of push tensioned strap
US6079457A (en) * 1999-04-09 2000-06-27 Illinois Tool Works Inc. Sealless strapping tool and method therefor
DE102008019956B3 (en) * 2008-04-21 2009-07-16 Titan Umreifungstechnik Gmbh & Co. Kg Strapping apparatus and method for making a strapping
CN105667867B (en) * 2016-01-12 2018-12-25 大连富地重工机械制造有限公司 A kind of split type lower knife body of binding machine with buckling-free steel belt
CN106742176B (en) * 2017-02-06 2023-04-25 大连富地重工机械制造有限公司 Steel belt packing machine capable of shearing steel belts in staggered mode and steel belt packing method
EP4157728A4 (en) * 2020-05-27 2024-08-07 Golden Bear LLC Strapping tool
CN113815922B (en) * 2020-06-18 2023-04-07 纬华企业股份有限公司 Loosening device for cardboard bundling machine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB597860A (en) * 1946-01-25 1948-02-04 Seal Less Strapping Ltd Improvements in and relating to strapping packages and the like
DE7702816U1 (en) * 1978-04-13 Fromm Ag, Spreitenbach (Schweiz) Device for the positive connection of two overlapping steel band parts
US2549626A (en) * 1944-02-15 1951-04-17 Mosey Frederick William Strapping machine
DE1906457U (en) * 1963-08-14 1964-12-10 Seal Less Strapping Ltd Of Ger DEVICE FOR TYING UP PACKAGES.
DE2133714C3 (en) * 1971-07-07 1974-04-11 Titan Verpackungssysteme Gmbh, 5830 Schwelm Strapping unit for strapping expansive goods
CH574841A5 (en) * 1974-12-20 1976-04-30 Strapex Ag
CH595242A5 (en) * 1975-04-08 1978-02-15 Fromm Ag Strip end joining machine
US4536248A (en) * 1983-07-25 1985-08-20 Cyklop International Emil Hoffman Kg Strapping apparatus

Also Published As

Publication number Publication date
CZ100294A3 (en) 1994-12-15
DE4313641A1 (en) 1994-10-27
EP0625464A2 (en) 1994-11-23
US5501252A (en) 1996-03-26
DE59403836D1 (en) 1997-10-02
EP0625464A3 (en) 1994-12-28
ES2064299T1 (en) 1995-02-01
CA2119944A1 (en) 1994-10-27
CA2119944C (en) 2005-08-09
ES2064299T3 (en) 1997-10-16
CZ288553B6 (en) 2001-07-11

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