EP0002653A1 - Device for drawing the leading edge of a sheet through a sheet treatment machine - Google Patents

Device for drawing the leading edge of a sheet through a sheet treatment machine Download PDF

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Publication number
EP0002653A1
EP0002653A1 EP78100047A EP78100047A EP0002653A1 EP 0002653 A1 EP0002653 A1 EP 0002653A1 EP 78100047 A EP78100047 A EP 78100047A EP 78100047 A EP78100047 A EP 78100047A EP 0002653 A1 EP0002653 A1 EP 0002653A1
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EP
European Patent Office
Prior art keywords
clamping
clamping pieces
sheet
pieces
wedge gap
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.)
Withdrawn
Application number
EP78100047A
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German (de)
French (fr)
Inventor
Hans-Jörg Weinzinger
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.)
Voestalpine AG
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Voestalpine AG
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Publication date
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Publication of EP0002653A1 publication Critical patent/EP0002653A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/16—Advancing webs by web-gripping means, e.g. grippers, clips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B65H5/14—Details of grippers; Actuating-mechanisms therefor

Definitions

  • the invention relates to a retraction device for a strip processing system with two clamping pieces for the beginning of the strip running transversely to the drawing direction and with two tensioning devices acting laterally on the clamping pieces and connected to a traction means.
  • pull-in devices are used, with the help of which the clamped band beginning can be pulled between the individual rolls and rollers of the stands.
  • two clamping rollers are provided in a known retraction device (OE-PS 248 364), which are eccentrically supported at the ends in a common frame and clamp the beginning of the tape between them by mutual rotation, so that the tape thus clamped with the help of the bearing frame connected traction means can be pulled between the red or rollers of the respective stands of the processing system.
  • the pinch rollers which are connected at the end via a pair of gearwheels, can be rotated in opposite directions by means of an adjusting lever which, when this clamping device is pulled through, abuts against a fixed starting curve and inevitably through this Clamping sense of the pinch rollers is actuated.
  • a disadvantage of this known device is that due to the eccentric clamp design, a comparatively large overall height of the clamping device is required, which requires a particularly wide opening possibility of the scaffolding.
  • only a clamping force that is independent of the applied tensile force can be achieved, which for a given rotation angle of the eccentric clamp also depends on the thickness of the band to be clamped.
  • the invention is therefore based on the object to avoid these deficiencies and to improve a retraction device of the type described in such a way that, at a low overall height with simple constructional means, a secure clamping of the beginning of the strip which is dependent on the strip tension but independent of the strip thickness is automatically guaranteed.
  • the invention achieves the stated object in that the clamping pieces consisting of pressure beams are articulated to one another in the region of their front longitudinal edges with respect to the drawing-in direction and are displaceably mounted in the tensioning devices in the drawing-in direction and in that the tensioning devices have a wedge gap tapering counter to the drawing-in direction for receiving laterally have locking cams attached to the clamping pieces.
  • clamping pieces designed as pressure bars have lateral locking cams that are pressed into the wedge gap when there is a relative displacement between the clamping pieces and the tensioning devices, there is an automatic clamping of the beginning of the tape located between the two clamping pieces because initially only the tensioning devices are over the traction means are moved.
  • the Clamping pieces are mounted displaceably with respect to the clamping devices, so that the closing cams of the clamping pieces penetrate into the wedge gap of the clamping devices and are pressed against each other by the resulting relative movement, which leads to a pincer-like closing of the clamping pieces due to the articulated connection of the clamping pieces.
  • the band is pulled along with the tensioning devices .
  • the wedge gap causes an increase in the clamping force when a greater tensile force has to be transmitted to the tape, so that it is impossible for the beginning of the tape to slip out of the clamping device.
  • the closing width of the clamping pieces depends only on the depth of penetration of the locking cams into the wedge gap of the tensioning devices, i.e. on the free displacement path of the clamping pieces relative to the tensioning device.
  • an opening cam is provided on both sides of the upper clamping piece with respect to the direction of retraction in front of the closing cam in a further embodiment of the invention, with an increasing guide surface of the respective clamping device in the direction of retraction interacts, the in the pulling direction measured distance between the closing cam and the opening cam is smaller than the corresponding distance of the entry opening of the wedge gap from the contact point of the opening cam on the guide surface. If, in order to open the clamping pieces, the tensioning devices are adjusted against the clamping pieces in the opposite direction of pulling out, the clamping force is first released by pulling the locking cams out of the wedge gap.
  • a particularly simple construction is obtained in a further embodiment of the invention in that the closing cams of the lower clamping piece are designed as sliding pieces which are mounted in a guide of the tensioning devices which is parallel to the drawing-in direction and which carries the two clamping pieces.
  • This measure makes separate supports of the clamping pieces for their displaceability with respect to the clamping devices unnecessary, because the clamping pieces can be fully supported on the clamping devices via the sliding pieces acting as abutments when closing the clamping pieces.
  • the closing cams of the upper clamping piece are shaped with respect to their surface interacting with the wedge gap according to the jacket of a circular cylinder lying parallel to the hinge axis of the clamping pieces, then the same contact and frictional relationships always result between these closing cams and the corresponding wedge surface of the wedge gap , no matter how far the clamping pieces are pressed against each other due to different tape thicknesses.
  • one of the clamping pieces distributed over its length against the other clamping piece can bear spring-loaded pressure plates which act on the beginning of the band to be clamped, so that deflections of the clamping pieces can be compensated for due to the resilient support of these pressure plates.
  • the provision of these spring-loaded pressure plates also offers the possibility of securely clamping strips divided into longitudinal strips, although different thicknesses of the individual partial strips must be expected.
  • the pull-in device shown consists of two clamps running transversely to the pull-in direction Pieces 1 and 2 for the beginning of the tape 3 and two clamping devices 4 provided laterally on these clamping pieces 1 and 2, which can be pulled through the scaffolding of the tape processing system, not shown, via a traction means 5, for example a chain, a rope or tape.
  • the clamping pieces 1 and 2 are designed as pressure beams and are articulated to one another in the region of their longitudinal edges which are at the front with respect to the drawing-in direction.
  • the joints are designated 6 in the drawing. Because of these joints 6, the beginning of the band 3 can be clamped between the clamping pieces 1 and 2 in the manner of pliers, as is illustrated in FIG. 4.
  • the lower clamping piece 2 has laterally protruding sliding pieces 7, which each engage in a guide 8 of the tensioning devices 4 parallel to the pulling-in direction and the two clamping pieces 1 and 2 in the tensioning devices 4 are displaceably mounted in the pulling-in direction.
  • Closing cams 9 are attached laterally to the upper clamping piece 1, which, with the sliding pieces 7 serving as abutments and thus also as closing cams, are inserted into a wedge gap 10 of the clamping devices with a relative displacement of the clamping devices 4 with respect to the clamping pieces 1 and 2, so that the gap between the Band pieces 3 located clamps is clamped between the clamps 1 and 2.
  • Fig. 4 shows this fact clearly.
  • the clamping devices which are designed as wedge gears, which are actuated by the traction means 5
  • the surfaces 11 of the locking cams 9 are shaped according to the jacket of a circular cylinder lying parallel to the hinge axis of the clamping pieces.
  • the upper clamping piece 1 is also provided with laterally projecting opening cams 12 which lie in front of the closing cams 9 with respect to the pull-in direction and are at a distance from the latter in the pull-in direction which is smaller than that Corresponding distance of the inlet opening of the wedge gap from the contact point of the opening cam on its cooperating guideway 13, which increases in the drawing-in direction, so that with a corresponding relative displacement between the clamping pieces 1 and 2 and the clamping devices 4, the upper clamping piece 1 is pivoted up, as this Fig.3 shows.
  • the opening angle of the wedge gap 10 must of course be selected as a function of the friction factors which occur, in order to prevent the locking cams 7, 9 from being pushed out of the wedge gap 10 independently.
  • An opening angle of less than or equal to 5 ° will usually take these conditions into account.
  • the clamping force must be able to be applied regardless of the deflection of the clamping pieces 1, 2 and any differences in thickness of the tapes.
  • several pressure plates 14 can be stored in one of the two clamping pieces distributed over its length, which are pressed by means of springs 15 against the other clamping piece and thus compensate for deflections of the clamping pieces and differences in thickness over the width of the band.
  • screws 16 are provided for mounting these pressure plates 14.

Abstract

In a device for drawing the leading edge of a sheet through a sheet treatment machine, two clamping pieces (1, 2), running transversely to the draw-in direction, for the leading edge of a sheet and two gripping devices (4) acting laterally on the clamping pieces and connected to a pulling means are provided. In order to ensure clamping of the leading edge of the sheet independently of the sheet width and to guarantee a low overall height, the clamping pieces (1, 2) consisting of pressure beams are connected to one another in articulated manner in the region of their front longitudinal edges with respect to the draw-in direction and are mounted in the gripping devices (4) so as to be displaceable in the draw-in direction. The gripping devices (4) have a wedge-shaped gap (10), tapering counter to the draw-in direction, for receiving closing cams (7, 9) which are laterally attached to the clamping pieces (1, 2). <IMAGE>

Description

Die Erfindung bezieht sich auf eine Einziehvorrichtung für eine Bandbearbeitungsanlage mit zwei quer zur Einziehrichtung verlaufenden Klemmstücken für den Bandanfang und mit zwei seitlich auf die Klemmstücke einwirkenden, an ein Zugmittel angeschlossenen Spanneinrichtungen.The invention relates to a retraction device for a strip processing system with two clamping pieces for the beginning of the strip running transversely to the drawing direction and with two tensioning devices acting laterally on the clamping pieces and connected to a traction means.

Um nicht den Bandanfang von Hand aus in die einzelnen Bandgerüste einer Bearbeitungsanlage einfädeln zu müssen, werden Einziehvorrichtungen verwendet, mit deren Hilfe der festgeklemmte Bandanfang zwischen den einzelnen Rollen und Walzen der Gerüste hindurchgezogen werden kann. Zu diesem Zweck sind bei einer bekannten Einziehvorrichtung (OE-PS 248 364) zwei Klemmwalzen vorgesehen, die endseitig in einem gemeinsamen Rahmen exzentrisch gelagert sind und durch gegenseitiges Verdrehen den Bandanfang zwischen sich festklemmen, so daß das so festgeklemmte Band mit Hilfe von an den Lagerrahmen angeschlossenen Zugmitteln zwischen den Roten oder Walzen der jeweiligen Gerüste der Bearbeitungsanlage hindurchgezogen werden kann. Um dabei die notwendige Klemmung des Bandanfanges zwischen den Klemmwalzen automatisch sicherzustellen, sind die endseitig über ein Zahnradpaar antriebsverbundenen Klemmwalzen über einen Stellhebel gegensinnig verdrehbar, der beim Durchziehen dieser Klemmeinrichtung gegen eine ortsfeste Anlaufkurve stößt und durch diese zwangsläufig im Klemmsinn der Klemmwalzen betätigt wird. Nachteilig bei dieser bekannten Vorrichtung ist, daß auf Grund der Exzenterklemmen-Bauart eine vergleichsweise große Bauhöhe der Klemmeinrichtung erforderlich ist, was eine besonders weite Öffnungsmöglichkeit der Gerüste bedingt. Außerdem kann nur eine von der aufgebrachten Zugkraft unabhängige Klemmkraft erreicht werden, die bei vorgegebenem Verdrehwinkel der Exzenterklemme noch dazu von der Stärke des zu klemmenden Bandes abhängt.In order not to have to manually thread the beginning of the band into the individual band stands of a processing system, pull-in devices are used, with the help of which the clamped band beginning can be pulled between the individual rolls and rollers of the stands. For this purpose, two clamping rollers are provided in a known retraction device (OE-PS 248 364), which are eccentrically supported at the ends in a common frame and clamp the beginning of the tape between them by mutual rotation, so that the tape thus clamped with the help of the bearing frame connected traction means can be pulled between the red or rollers of the respective stands of the processing system. In order to automatically ensure the necessary clamping of the beginning of the tape between the pinch rollers, the pinch rollers, which are connected at the end via a pair of gearwheels, can be rotated in opposite directions by means of an adjusting lever which, when this clamping device is pulled through, abuts against a fixed starting curve and inevitably through this Clamping sense of the pinch rollers is actuated. A disadvantage of this known device is that due to the eccentric clamp design, a comparatively large overall height of the clamping device is required, which requires a particularly wide opening possibility of the scaffolding. In addition, only a clamping force that is independent of the applied tensile force can be achieved, which for a given rotation angle of the eccentric clamp also depends on the thickness of the band to be clamped.

Der Erfindung liegt demnach die Aufgabe zugrunde, diese Mängel zu vermeiden und eine Einziehvorrichtung der eingangs geschilderten Art so zu verbessern, daß bei geringer Bauhöhe mit einfachen konstruktiven Mitteln eine sichere, vom Bandzug abhängige, von der Bandstärke jedoch unabhängige Klemmung des Bandanfanges automatisch gewährleistet wird.The invention is therefore based on the object to avoid these deficiencies and to improve a retraction device of the type described in such a way that, at a low overall height with simple constructional means, a secure clamping of the beginning of the strip which is dependent on the strip tension but independent of the strip thickness is automatically guaranteed.

Die Erfindung löst die gestellte Aufgabe dadurch, daß die aus Druckbalken bestehenden Klemmstücke im Bereich ihrer bezüglich der Einziehrichtung vorderen Längskanten miteinander gelenkig verbunden und in Einziehrichtung verschiebbar in den Spanneinrichtungen gelagert sind und daß die Spanneinrichtungen einen sich entgegen der Einziehrichtung verjüngenden Keilspalt zur Aufnahme von seitlich an den Klemmstücken angesetzten Schließnocken aufweisen.The invention achieves the stated object in that the clamping pieces consisting of pressure beams are articulated to one another in the region of their front longitudinal edges with respect to the drawing-in direction and are displaceably mounted in the tensioning devices in the drawing-in direction and in that the tensioning devices have a wedge gap tapering counter to the drawing-in direction for receiving laterally have locking cams attached to the clamping pieces.

Da die als Druckbalken ausgebildeten Klemmstücke seitliche Schließnocken aufweisen, die bei einer relativen Verschiebung zwischen den Klemmstücken und den Spanneinrichtungen in den Keilspalt eingedrückt werden, ergibt sich beim Einziehen des Bandes eine automatische Klemmung des zwischen den beiden Klemmstücken befindlichen Bandanfanges, weil zunächst lediglich die Spanneinrichtungen über das Zugmittel bewegt werden. Die Klemmstücke sind ja gegenüber den Spanneinrichtungen verschiebbar gelagert, so daß durch die dabei auftretende Relativbewegung die Schließnocken der Klemmstücke in den Keilspalt der Spanneinrichtungen eindringen und durch diesen gegeneinandergepreßt werden, was auf Grund der gelenkigen Verbindung der Klemmstücke zu einem zangenartigen Schließen der Klemmstücke führt. Sobald das Band zwischen den Klemmstücken festgeklemmt ist und sich keine Relativbewegung mehr zwischen den Spanneinrichtungen und den Klemmstücken ergibt, weil die aufgebrachte Klemmkraft zur Förderung des Bandes ausreicht und demnach die Schließnocken im Keilspalt nicht noch weiter zusammengedrückt werden müssen, wird das Band mit den Spanneinrichtungen mitgezogen. Der Keilspalt bewirkt dabei eine Erhöhung der Klemmkraft, wenn eine größere Zugkraft auf das Band übertragen werden muß, so daß ein Herausrutschen des Bandanfanges aus der Klemmeinrichtung unmöglich ist. Außerdem ergibt sich durch die Klemmung über den Keilspalt eine Unabhängigkeit der Klemmeinrichtung gegenüber der Bandstärke, weil die Schließweite der Klemmstücke nur von der Eindringtiefe der Schließnocken in den Keilspalt der Spanneinrichtungen abhängt, also vom freien Verschiebeweg der Klemmstücke gegenüber der Spanneinrichtung.Since the clamping pieces designed as pressure bars have lateral locking cams that are pressed into the wedge gap when there is a relative displacement between the clamping pieces and the tensioning devices, there is an automatic clamping of the beginning of the tape located between the two clamping pieces because initially only the tensioning devices are over the traction means are moved. The Clamping pieces are mounted displaceably with respect to the clamping devices, so that the closing cams of the clamping pieces penetrate into the wedge gap of the clamping devices and are pressed against each other by the resulting relative movement, which leads to a pincer-like closing of the clamping pieces due to the articulated connection of the clamping pieces. As soon as the band is clamped between the clamping pieces and there is no longer any relative movement between the tensioning devices and the clamping pieces, because the clamping force applied is sufficient to convey the band and accordingly the closing cams in the wedge gap do not have to be pressed any further, the band is pulled along with the tensioning devices . The wedge gap causes an increase in the clamping force when a greater tensile force has to be transmitted to the tape, so that it is impossible for the beginning of the tape to slip out of the clamping device. In addition, there is an independence of the clamping device from the band thickness due to the clamping via the wedge gap, because the closing width of the clamping pieces depends only on the depth of penetration of the locking cams into the wedge gap of the tensioning devices, i.e. on the free displacement path of the clamping pieces relative to the tensioning device.

Um nicht nur ein automatisches Schließen, sondern auch ein selbständiges Öffnen der Klemmstücke gewährleisten zu können, ist in weiterer Ausbildung der Erfindung auf beiden Seiten des oberen Klemmstückes hinsichtlich der Einziehrichtung vor dem Schließnocken ein Öffnungsnocken vorgesehen, der mit einer in Einziehrichtung ansteigenden Führungsfläche der jeweiligen Spanneinrichtung zusammenwirkt, wobei der in Einziehrichtung gemessene Abstand zwischen dem Schließnocken und dem Öffnungsnocken kleiner als der entsprechende Abstand der Eintrittsöffnung des Keilspaltes von der Auflaufstelle des Öffnungsnockens auf die Führungsfläche ist. Werden zum Öffnen der Klemmstücke die Spanneinrichtungen entgegen der Einziehrichtung gegenüber den Klemmstücken verstellt, so wird durch das Herausziehen der Schließnocken aus dem Keilspalt zunächst die Klemmkraft aufgehoben. Dann läuft nach dem Austreten des Schließnockens des oberen Druckstückes aus dem Keilspalt der Öffnungsnocken auf die Führungsbahn der Spanneinrichtungen auf, so daß bei der weiteren Relativverschiebung zwischen Spanneinrichtungen und Klemmstücken das obere Klemmstück durch die ansteigende Führungsbahn um die Gelenkachse zwischen den Klemmstücken hochgeschwenkt wird. Die Abstimmung der Abstände zwischen den beiden Nocken einerseits und dem Keilspalt und der Führungsbahn anderseits stellt dabei sicher, daß das Aufschwenken des oberen Klemmstückes erst eingeleitet wird, wenn es vom Keilspalt freigegeben ist.In order to ensure not only automatic closing, but also an independent opening of the clamping pieces, an opening cam is provided on both sides of the upper clamping piece with respect to the direction of retraction in front of the closing cam in a further embodiment of the invention, with an increasing guide surface of the respective clamping device in the direction of retraction interacts, the in the pulling direction measured distance between the closing cam and the opening cam is smaller than the corresponding distance of the entry opening of the wedge gap from the contact point of the opening cam on the guide surface. If, in order to open the clamping pieces, the tensioning devices are adjusted against the clamping pieces in the opposite direction of pulling out, the clamping force is first released by pulling the locking cams out of the wedge gap. Then runs after the exit cam of the upper pressure piece from the wedge gap of the opening cams on the guideway of the clamping devices, so that in the further relative displacement between clamping devices and clamping pieces, the upper clamping piece is pivoted up by the rising guideway about the hinge axis between the clamping pieces. The coordination of the distances between the two cams on the one hand and the wedge gap and the guideway on the other hand ensures that the pivoting of the upper clamping piece is only initiated when it is released from the wedge gap.

Eine besonders einfache Konstruktion wird in weiterer Ausbildung der Erfindung dadurch erhalten, daß die Schließnocken des unteren Klemmstückes als in einer zur Einziehrichtung parallelen Führung der Spanneinrichtungen gelagerte, die beiden Klemmstücke tragende Gleitstücke ausgebildet sind. Durch diese Maßnahme werden nämlich gesonderte Lagerungen der Klemmstücke zu deren Verschiebbarkeit gegenüber den Spanneinrichtungen unnötig, weil sich die Klemmstücke über die als Widerlager beim Schließen der Klemmstücke wirkenden Gleitstücke an den Spanneinrichtungen voll abstützen können.A particularly simple construction is obtained in a further embodiment of the invention in that the closing cams of the lower clamping piece are designed as sliding pieces which are mounted in a guide of the tensioning devices which is parallel to the drawing-in direction and which carries the two clamping pieces. This measure makes separate supports of the clamping pieces for their displaceability with respect to the clamping devices unnecessary, because the clamping pieces can be fully supported on the clamping devices via the sliding pieces acting as abutments when closing the clamping pieces.

Sind nach einer weiteren Ausgestaltung der Erfindung die Schließnocken des oberen Klemmstückes bezüglich ihrer mit dem Keilspalt zusammenwirkenden Oberfläche nach dem Mantel eines parallel zur Gelenkachse der Klemmstücke liegenden Kreiszylinders geformt, so ergeben sich stets gleiche Berührungs- und Reibungsverhältnisse zwischen diesen Schließnocken und der entsprechenden Keilfläche des Keilspaltes, gleichgültig wie weit die Klemmstücke zufolge verschiedener Bandstärken gegeneinandergedrückt werden.If, according to a further embodiment of the invention, the closing cams of the upper clamping piece are shaped with respect to their surface interacting with the wedge gap according to the jacket of a circular cylinder lying parallel to the hinge axis of the clamping pieces, then the same contact and frictional relationships always result between these closing cams and the corresponding wedge surface of the wedge gap , no matter how far the clamping pieces are pressed against each other due to different tape thicknesses.

Schließlich kann eines der Klemmstücke über seine Länge verteilt gegen das andere Klemmstück gerichtete, federbelastete Druckplatten tragen, die auf den zu klemmenden Bandanfang einwirken, so daß zufolge der federnden Abstützung dieser Druckplatten Durchbiegungen der Klemmstücke ausgeglichen werden können. Das Vorsehen dieser federbelasteten Druckplatten bietet auch die Möglichkeit, in Längsstreifen geteilte Bänder sicher zu klemmen, obwohl mit unterschiedlichen Stärken der einzelnen Teilstreifen gerechnet werden muß.Finally, one of the clamping pieces distributed over its length against the other clamping piece can bear spring-loaded pressure plates which act on the beginning of the band to be clamped, so that deflections of the clamping pieces can be compensated for due to the resilient support of these pressure plates. The provision of these spring-loaded pressure plates also offers the possibility of securely clamping strips divided into longitudinal strips, although different thicknesses of the individual partial strips must be expected.

In der Zeichnung ist der Erfindungsgegenstand in einem Ausführungsbeispiel schematisch dargestellt.
Es zeigen:

  • Fig. 1 eine erfindungsgemäße Einziehvorrichtung für eine Bandbearbeitungsanlap in Draufsicht,
  • Fig. 2 diese Vorrichtung in Vorderansicht,
  • Fig. 3 einen Schnitt nach der Linie III-III der Fig. 1 im größeren Maßstab bei offenen Klemmstücken,
  • Fig. 4 eine der Fig. 3 entsprechende Darstellung, jedoch mit geschlossenen Klemmstücken, und
  • Fig. 5 einen Schnitt nach der Linie V-V der Fig. 1, ebenfalls in größerem Maßstab.
In the drawing, the object of the invention is shown schematically in one embodiment.
Show it:
  • 1 is a top view of a pull-in device for a tape processing system,
  • 2 this device in front view,
  • 3 shows a section along the line III-III of FIG. 1 on a larger scale with open clamping pieces,
  • Fig. 4 is a representation corresponding to FIG. 3, but with closed clamping pieces, and
  • Fig. 5 shows a section along the line VV of Fig. 1, also on a larger scale.

Wie besonders deutlich aus den Fig. 1 und 2 zu ersehen ist, besteht die dargestellte Einziehvorrichtung aus zwei quer zur Einziehrichtung verlaufenden Klemmstücken 1 und 2 für den Bandanfang 3 und aus zwei seitlich dieser Klemmstücke 1 und 2 vorgesehenen Spanneinrichtungen 4, die über ein Zugmittel 5, beispielsweise eine Kette, ein Seil oder Band, durch die Gerüste der nicht dargestellten Bandbearbeitungsanlage hindurchgezogen werden können.As can be seen particularly clearly from FIGS. 1 and 2, the pull-in device shown consists of two clamps running transversely to the pull-in direction Pieces 1 and 2 for the beginning of the tape 3 and two clamping devices 4 provided laterally on these clamping pieces 1 and 2, which can be pulled through the scaffolding of the tape processing system, not shown, via a traction means 5, for example a chain, a rope or tape.

Die Klemmstücke 1 und 2 sind als Druckbalken ausgebildet und im Bereich ihrer bezüglich der Einziehrichtung vorderen Längskanten aneinander angelenkt. Die Gelenke sind in der Zeichnung mit 6 bezeichnet. Auf Grund dieser Gelenke 6 kann der Bandanfang 3 zwischen den Klemmstücken 1 und 2 zangenartig festgekelemmt werden,'wie dies in Fig. 4 veranschaulicht ist.The clamping pieces 1 and 2 are designed as pressure beams and are articulated to one another in the region of their longitudinal edges which are at the front with respect to the drawing-in direction. The joints are designated 6 in the drawing. Because of these joints 6, the beginning of the band 3 can be clamped between the clamping pieces 1 and 2 in the manner of pliers, as is illustrated in FIG. 4.

Das untere Klemmstück 2 weist seitlich vorragende Gleitstücke 7 auf, die jeweils in eine zur Einziehrichtung parallele Führung 8 der Spanneinrichtungen 4 eingreifen und die beiden Klemmstücke 1 und 2 in den Spanneinrichtungen 4 in Einziehrichtung verschiebbar lagern.The lower clamping piece 2 has laterally protruding sliding pieces 7, which each engage in a guide 8 of the tensioning devices 4 parallel to the pulling-in direction and the two clamping pieces 1 and 2 in the tensioning devices 4 are displaceably mounted in the pulling-in direction.

Am oberen Klemmstück 1 sind seitlich Schließnocken 9 angesetzt, die mit den als Widerlager und damit ebenfalls als Schließnocken dienenden Gleitstücken 7 bei einer Relativverschiebung der Spanneinrichtungen 4 gegenüber den Klemmstücken 1 und 2 in einen Keilspalt 10 der Spanneinrichtungen eingeschoben werden, so daß der sich zwischen den Klemmstücken befindende Bandanfang 3 zwischen den Klemmstücken 1 und 2 festgeklemmt wird. Fig. 4 zeigt diesen Sachverhalt anschaulich.Closing cams 9 are attached laterally to the upper clamping piece 1, which, with the sliding pieces 7 serving as abutments and thus also as closing cams, are inserted into a wedge gap 10 of the clamping devices with a relative displacement of the clamping devices 4 with respect to the clamping pieces 1 and 2, so that the gap between the Band pieces 3 located clamps is clamped between the clamps 1 and 2. Fig. 4 shows this fact clearly.

Auf Grund der gewissermaßen als Keilgetriebe ausgebildeten Spanneinrichtungen, die durch das Zugmittel 5 betätigt werden, kann nicht nur eine sehr geringe Bauhöhe der gesamten Einziehvorrichtung ermöglicht werden, sondern auch eine Unabhängigkeit gegenüber der Stärke des zu klemmenden Bleches, weil über das Keilgetriebe eben sowohl auf dünne als auch auf stärkere Bänder eine in Abhängigkeit vom auftretenden Bandzug wirksame Klemmkraft ausgeübt werden kann. Um für alle Blechstärken gleiche Berührungsbedingungen zwischen den Schließnocken 9 des oberen Klemmstückes 1 und der entsprechenden Gegenfläche des Keilspaltes 10 sicherzustellen, sind die Oberflächen 11 der Schließnocken 9 nach dem Mantel eines parallel zur Gelenkachse der Klemmstücke liegenden Kreiszylinders geformt.Due to the clamping devices, which are designed as wedge gears, which are actuated by the traction means 5, not only a very low overall height of the entire pulling device can be made possible, but also independence from the thickness of the sheet to be clamped, because of the wedge gearing an effective clamping force can be exerted on both thin and stronger tapes depending on the tape tension that occurs. In order to ensure the same contact conditions between the locking cams 9 of the upper clamping piece 1 and the corresponding counter surface of the wedge gap 10 for all sheet thicknesses, the surfaces 11 of the locking cams 9 are shaped according to the jacket of a circular cylinder lying parallel to the hinge axis of the clamping pieces.

Um die Einziehvorrichtung nicht nur automatisch schließen, sondern auch selbständig öffnen zu können, ist das obere Klemmstück 1 mit ebenfalls seitlich vorragenden Öffnungsnocken 12 versehen, die hinsichtlich der Einziehrichtung vor den Schließnocken 9 liegen und von diesen in Einziehrichtung einen Abstand aufweisen, der kleiner als der entsprechende Abstand der Eintrittsöffnung des Keilspaltes von der Auflaufstelle des Öffnungsnockens auf seine mit ihm zusammenwirkende Führungsbahn 13 ist, die in Einziehrichtung ansteigt, so daß bei einer entsprechenden Relativverschiebung zwischen den Klemmstücken 1 und 2 und den Spanneinrichtungen 4 das obere Klemmstück 1 hochgeschwenkt wird, wie dies Fig.3 zeigt.In order not only to automatically close the pull-in device but also to be able to open it independently, the upper clamping piece 1 is also provided with laterally projecting opening cams 12 which lie in front of the closing cams 9 with respect to the pull-in direction and are at a distance from the latter in the pull-in direction which is smaller than that Corresponding distance of the inlet opening of the wedge gap from the contact point of the opening cam on its cooperating guideway 13, which increases in the drawing-in direction, so that with a corresponding relative displacement between the clamping pieces 1 and 2 and the clamping devices 4, the upper clamping piece 1 is pivoted up, as this Fig.3 shows.

Damit beim Schließen dieser Klemmeinrichtung die erforderliche Klemmkraft tatsächlich aufgebracht werden kann, muß der Öffnungswinkel des Keilspaltes 10 natürlich in Abhängigkeit von den auftretenden Reibungsfaktoren gewählt werden, um ein selbständiges Hinausdrücken der Schließnocken 7, 9 aus dem Keilspalt 10 zu verhindern. Ein Öffnungswinkel kleiner gleich 5° wird diesen Bedingungen üblicherweise Rechnung tragen.So that the required clamping force can actually be applied when this clamping device is closed, the opening angle of the wedge gap 10 must of course be selected as a function of the friction factors which occur, in order to prevent the locking cams 7, 9 from being pushed out of the wedge gap 10 independently. An opening angle of less than or equal to 5 ° will usually take these conditions into account.

Soll der zu klemmende Bandanfang 3 über seine ganze Breite mit annähernd gleicher Klemmkraft beaufschlagt werden oder sollen die einzelnen Streifen eines in Längsstreifen unterteilten Bandes gleichzeitig erfaßt werden, so muß die Klemmkraft unabhängig von der Durchbiegung der Klemmstücke 1,2 und allfälligen Stärkenunterschieden der Bänder aufgebracht werden können. Zu diesem Zweck können in einem der beiden Klemmstücke über seine Länge verteilt mehrere Druckplatten 14 gelagert sein, die mit Hilfe von Federn 15 gegen das andere Klemmstück gedrückt werden und somit Durchbiegungen der Klemmstücke sowie Dickenunterschiede über die Breite des Bandes ausgleichen. Zur Lagerung dieser Druckplatten 14 sind nach dem Ausführungsbeispiel Schrauben 16 vorgesehen.Should the band to be clamped 3 be subjected to approximately the same clamping force over its entire width or should the individual strips be one in the longitudinal direction strip subdivided tape are detected at the same time, the clamping force must be able to be applied regardless of the deflection of the clamping pieces 1, 2 and any differences in thickness of the tapes. For this purpose, several pressure plates 14 can be stored in one of the two clamping pieces distributed over its length, which are pressed by means of springs 15 against the other clamping piece and thus compensate for deflections of the clamping pieces and differences in thickness over the width of the band. According to the exemplary embodiment, screws 16 are provided for mounting these pressure plates 14.

Claims (5)

1. Einziehvorrichtung für eine Bandbearbeitungsanlage mit zwei quer zur Einziehrichtung verlaufenden Klemmstücken für den Bandanfang und mit zwei seitlich auf die Klemmstücke einwirkenden, an ein Zugmittel angeschlossenen Spanneinrichtungen, dadurch gekennzeichnet, daß die aus Druckbalken bestehenden Klemmstücke (1,2) im Bereich ihrer bezüglich der Einziehrichtung vorderen Längskanten miteinander gelenkig verbunden und in Einziehrichtung verschiebbar in den Spanneinrichtungen (4) gelagert sind und daß die Spanneinrichtungen (4) einen sich entgegen der Einziehrichtung verjüngenden Keilspalt (10) zur Aufnahme von seitlich an den Klemmstücken (1,2) angesetzten Schließnocken (7,9) aufweisen.1. Pulling device for a strip processing system with two clamping pieces running transversely to the drawing-in direction for the beginning of the strip and with two clamping devices acting laterally on the clamping pieces, connected to a traction means, characterized in that the clamping pieces (1, 2) consisting of pressure beams are in the region of their with respect to the The direction of retraction of the front longitudinal edges is articulated to one another and is mounted in the tensioning devices (4) so that it can be moved in the direction of retraction, and that the tensioning devices (4) have a wedge gap (10) that tapers against the direction of retraction to accommodate closing cams (1,2) attached to the side of the clamping pieces (1,2). 7.9). 2. Einziehvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß auf beiden Seiten des oberen Klemmstückes (1) hinsichtlich der Einziehrichtung vor dem Schließnocken (9) ein Öffnungsnocken (12) vorgesehen ist, der mit einer in Einziehrichtung ansteigenden Führungsfläche (13) der jeweiligen Spanneinrichtung (4) zusammenwirkt, wobei der in Einziehrichtung gemessene Abstand zwischen dem Schließnocken (9) und dem Öffnungsnocken (12) kleiner als der entsprecherd e Abstand der Eintrittsöffnung des Keilspaltes (10) von der Auflaufstelle des Öffnungsnockens (12) auf die Führungsfläche (13) ist.2. Pulling device according to claim 1, characterized in that an opening cam (12) is provided on both sides of the upper clamping piece (1) with respect to the pulling direction in front of the closing cam (9), which with a rising in the pulling direction guide surface (13) of the respective clamping device (4) cooperates, the distance between the closing cam (9) and the opening cam (12) measured in the drawing-in direction being smaller than the corresponding distance of the entry opening of the wedge gap (10) from the contact point of the opening cam (12) on the guide surface (13) is. 3. Einziehvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Schließnocken des unteren Klemmstückes (2) als in einer zur Einziehrichtung parallelen Führung (8) der Spanneinrichtungen (4) gelagerte, die beiden Klemmstücke (1,2) tragende Gleitstücke (7) ausgebildet sind.3. Pulling device according to claim 1 or 2, characterized in that the closing cams of the lower clamping piece (2) as in a parallel to the drawing direction (8) of the tensioning devices (4) mounted, the two clamping pieces (1,2) carrying sliders (7 ) are trained. 4. Einziehvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Schließnocken (9) des oberen Klemmstückes (1) bezüglich ihrer mit dem Keilspalt (10) zusammenwirkenden Oberfläche (11) nach dem Mantel eines parallel zur Gelenkachse der Klemmstücke (1,2) liegenden Kreiszylinders geformt sind.4. Pulling device according to one of claims 1 to 3, characterized in that the locking cams (9) of the upper clamping piece (1) with respect to their with the wedge gap (10) interacting surface (11) after the jacket of a parallel to the hinge axis of the clamping pieces (1 , 2) lying circular cylinders are formed. 5. Einziehvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß eines der Klemmstücke (1,2) über seine Länge verteilt gegen das andere Klemmstück (2) gerichtete, federbelastete Druckplatten (14) trägt.5. Pulling device according to one of claims 1 to 4, characterized in that one of the clamping pieces (1,2) distributed over its length against the other clamping piece (2) directed, spring-loaded pressure plates (14).
EP78100047A 1977-12-20 1978-06-01 Device for drawing the leading edge of a sheet through a sheet treatment machine Withdrawn EP0002653A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT9103/77 1977-12-20
AT910377A AT354390B (en) 1977-12-20 1977-12-20 PULL-IN DEVICE FOR A TAPE MACHINING SYSTEM

Publications (1)

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EP0002653A1 true EP0002653A1 (en) 1979-07-11

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EP78100047A Withdrawn EP0002653A1 (en) 1977-12-20 1978-06-01 Device for drawing the leading edge of a sheet through a sheet treatment machine

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EP (1) EP0002653A1 (en)
AT (1) AT354390B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999030898A1 (en) * 1997-12-12 1999-06-24 Interfic Engineering Limited Apparatus and method for manufacturing paper board

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE404909C (en) * 1924-10-24 Preusse & Co Akt Ges Sheet pulling mark for high-speed presses, folding machines and similar machines
US1525122A (en) * 1924-06-05 1925-02-03 Pittsburgh Plate Glass Co Sheet-glass clamp
DE739168C (en) * 1932-05-31 1943-09-13 Margarete Gerbert Transport tongs for feed devices on presses, punches or the like.
US2418065A (en) * 1940-10-16 1947-03-25 Bobst Henri Blank feeding means
US2702929A (en) * 1951-07-26 1955-03-01 Rohr Aircraft Corp Clamp
DE1078075B (en) * 1957-02-02 1960-03-24 Hydraulik Gmbh Clamping device for sheets and plates, especially on stretching machines
FR1358416A (en) * 1963-01-12 1964-04-17 Device for the automatic transport and handling of sheet or plate material
AT248364B (en) * 1964-10-12 1966-07-25 Voest Ag Pull-in device for systems that process strip material
US3638909A (en) * 1970-11-13 1972-02-01 Herbert Oliver Richard Dew Gripping means
DE2604909B1 (en) * 1976-02-07 1976-09-09 Sundwiger Eisen Maschinen Device for the correctly positioned transport of the beginning of the strip of metal strips to be wound up to a reel drum

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE404909C (en) * 1924-10-24 Preusse & Co Akt Ges Sheet pulling mark for high-speed presses, folding machines and similar machines
US1525122A (en) * 1924-06-05 1925-02-03 Pittsburgh Plate Glass Co Sheet-glass clamp
DE739168C (en) * 1932-05-31 1943-09-13 Margarete Gerbert Transport tongs for feed devices on presses, punches or the like.
US2418065A (en) * 1940-10-16 1947-03-25 Bobst Henri Blank feeding means
US2702929A (en) * 1951-07-26 1955-03-01 Rohr Aircraft Corp Clamp
DE1078075B (en) * 1957-02-02 1960-03-24 Hydraulik Gmbh Clamping device for sheets and plates, especially on stretching machines
FR1358416A (en) * 1963-01-12 1964-04-17 Device for the automatic transport and handling of sheet or plate material
AT248364B (en) * 1964-10-12 1966-07-25 Voest Ag Pull-in device for systems that process strip material
US3638909A (en) * 1970-11-13 1972-02-01 Herbert Oliver Richard Dew Gripping means
DE2604909B1 (en) * 1976-02-07 1976-09-09 Sundwiger Eisen Maschinen Device for the correctly positioned transport of the beginning of the strip of metal strips to be wound up to a reel drum

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999030898A1 (en) * 1997-12-12 1999-06-24 Interfic Engineering Limited Apparatus and method for manufacturing paper board

Also Published As

Publication number Publication date
ATA910377A (en) 1979-06-15
AT354390B (en) 1980-01-10

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