EP0015358B1 - Feeding device for a strip processing apparatus - Google Patents

Feeding device for a strip processing apparatus Download PDF

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Publication number
EP0015358B1
EP0015358B1 EP19790890069 EP79890069A EP0015358B1 EP 0015358 B1 EP0015358 B1 EP 0015358B1 EP 19790890069 EP19790890069 EP 19790890069 EP 79890069 A EP79890069 A EP 79890069A EP 0015358 B1 EP0015358 B1 EP 0015358B1
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EP
European Patent Office
Prior art keywords
clamping
jaws
pliers
force
spring
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Expired
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EP19790890069
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German (de)
French (fr)
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EP0015358A1 (en
Inventor
Gerhard Breitschopf
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Voestalpine AG
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Voestalpine AG
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02Advancing work in relation to the stroke of the die or tool
    • B21D43/04Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/10Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
    • B21D43/11Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers for feeding sheet or strip material

Definitions

  • the invention relates to a retraction device for a strip processing system with a clamping device that can be moved in the retraction direction for the beginning of the strip, which consists of two clamping jaws that can be pressed against one another by means of a tensioning device and actuating devices for the tensioning device that are provided on the travel path.
  • the clamping jaws of the clamping device are formed by two clamping rollers, which are eccentrically supported at the ends in a common frame and, by mutual rotation, clamp the beginning of the tape inserted between them, so that the pinched tape also With the help of traction means connected to the bearing frame, it can be pulled between the rollers of the respective stands of the processing system.
  • the pinch rollers are drive-connected at the end via a pair of gearwheels and can be rotated in opposite directions via an adjusting lever in order to automatically clamp the beginning of the belt between the pinch rollers.
  • actuating devices are provided on the travel path, which have a starting curve for the actuating lever, so that when the clamping device moves past the actuating devices, the actuating lever is rotated by the starting curve and the clamping rollers are adjusted in the clamping direction.
  • the clamping device can be opened again via a correspondingly differently inclined starting curve.
  • a disadvantage of this known device is that, due to the type of eccentric clamps, a comparatively large overall height of the clamping device is required, which requires the scaffolds to be opened particularly widely. In addition, only a clamping force dependent on the predetermined angle of rotation of the eccentric clamp can be applied, which does not take into account deflections of the clamping rollers or differences in thickness of the strip to be clamped. Such a pull-in device is therefore also unsuitable for threading tapes divided into longitudinal strips.
  • wire and rod pulling pliers are known (DE-A-920662), in which the workpiece to be clamped is pressed against a fixed clamping body with the aid of an eccentrically mounted disc or a cam. Due to the eccentric mounting of the disc or the cam shape, the clamping force is also determined in this construction by the tensile force exerted on the pliers, because with a relative movement between the pliers and the material to be drawn, the eccentric disc or the cam is pivoted from the material to be drawn in order to increase the clamping force . Moving the pliers against the pulling direction opens the jaws automatically.
  • the eccentric disc or the clamping cams can be acted upon by a torque in the closing direction via a spring-loaded lever, so that the eccentric disc or . the clamping cam is in any case in contact with the drawing material.
  • the clamping force is not applied by this spring, but by the wedge effect when turning the clamping disc or the clamping cam. Since eccentrically mounted disks or cams are provided in this known construction, there is initially a comparatively large overall height, which makes it difficult to insert the drawn material into a roll gap. In addition, actuation of the clamping device is not possible regardless of the tensile load on the pliers.
  • FR-A-1 113034 Similar difficulties also occur with another known tensioning construction (FR-A-1 113034), in which the clamping force to be exerted on the drawing material is achieved by tensioning balls or the like held in a cage. These balls have an inside cone together, against which the cage is displaceable in the axial direction. If the cage is now moved towards the tip of the inner cone via the clamping balls lying against the drawing material, the drawing material is clamped by the clamping balls. To release the clamping device, the drawn material must be moved in opposite directions. So that the clamping balls actually rest on the drawn material, a spring is again provided, which acts on the cage for the clamping balls in the direction of closure.
  • the clamping force depends on the applied tensile force, which, as has already been stated, can lead to difficulties when applying the tensile force.
  • a flat design cannot be achieved due to the tension balls arranged in an inner cone and held in a displaceable cage.
  • feed pliers are known (DE-U-70 33 14 5 ) in which the pretension of a spring for the closing pressure can be adjusted by means of an eccentric so that the full clamping force does not have to be overcome when the clamping jaws are opened. The jaws can therefore be pushed apart by a weaker spring if the pretension of the closing spring is reduced.
  • a disadvantage of this known feed tongs is that a comparatively high design effort with a greater overall height is required, which makes the use of these feed tongs unsuitable for pulling-in devices of strip processing systems.
  • different strip thicknesses over the strip beginning to be clamped cannot be taken into account.
  • the invention is therefore based on the object of avoiding these deficiencies and of improving a drawing-in device for a strip processing system of the type described at the outset in such a way that on the one hand a very low overall height can be ensured and on the other hand a clamping force which is effective regardless of the strip thickness and the tensile force is ensured, which also takes into account deflections of the clamping jaws or differences in thickness of the beginning of the strip to be clamped.
  • the clamping force according to the invention is applied exclusively by springs, this clamping force is of course independent of the tensile forces acting on the clamping device or of the band thickness.
  • the overall height is determined solely by the desired opening width of the clamping jaws, because the use of appropriately strong springs means that only comparatively small lever arms are required.
  • each spring-loaded clamping piece means that even in the case of different sheet thicknesses or of strips divided into longitudinal strips or of bending jaws, a region-specific individual clamping can be ensured, which enables an independent adjustment of the clamping device with different belt thicknesses.
  • the disadvantage of beam deflection is avoided by such a construction, because the deflection can only extend to comparatively narrow clamping pieces.
  • clamping springs provides a simple readjustment of the clamping force, because for this purpose only the preload of the springs has to be changed. A large clamping force can thus be generated with a low overall height, regardless of the applied one Tensile force is effective and remains unaffected by beam deflections and wear on the clamping jaws.
  • the drawing device shown consists essentially of a clamping device 1, which has two clamping jaws 2 and 3. These clamping jaws 2 and 3 are connected to one another via hinge pins 4 in the manner of a pair of pliers and are loaded by means of a spring 5 in the direction of closure.
  • the spring 5 consists of a plate spring assembly, as is shown in particular in FIG. 2.
  • the clamping jaw 3 consists of individual clamping pieces 6, each of which is mounted on the other clamping jaw 2, which are each loaded by a spring 5, so that the individual clamping pieces 6 are only on a comparative basis small areas of the band to be clamped act.
  • the construction is designed such that two arms 7 of the clamping pieces 6 each protrude through recesses 8 of the clamping jaw 2. 'This enables the use of a compression spring'5, although the jaws 2 and 3 are only designed as one-armed levers. This ensures a particularly low overall height, which essentially depends only on the desired opening width of the clamping jaws 2 and 3.
  • the jaws 2 and 3 are pressed against one another via the spring 5, which is inserted in a pot 9, and a band 10 can be clamped between them.
  • actuating devices 11 are provided on the travel path of the clamping device 1, which press together or individually on the clamping pieces 6 and open the jaws against the force of the spring 5.
  • the opened clamping device is shown in Fig. 3.
  • the clamping jaw 2 not acted upon by the actuating device 11 must of course be supported accordingly, which is achieved by a fixed support 12 according to FIGS. 4 and 5.
  • the actuating device 11 has at least one cylinder 13, which according to FIG. 4 actuates an eccentric 14 and according to FIG. 5 an actuating lever 1'5, which in each case leads to the opening of the clamping device located in the area of the actuating device.
  • Suitable traction means can be connected to the side lugs 18 of the clamping jaw 2 for moving the gill device 1.

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Description

Die Erfindung bezieht sich auf eine Einziehvorrichtung für eine Bandbearbeitungsanlage mit einer in Einziehrichtung verfahrbaren Klemmeinrichtung für den Bandanfang, die aus zwei mittels einer Spanneinrichtung gegeneinander drückbaren Klemmbacken und an der Verfahrstrecke vorgesehenen Betätigungsvorrichtungen für die Spanneinrichtung besteht.The invention relates to a retraction device for a strip processing system with a clamping device that can be moved in the retraction direction for the beginning of the strip, which consists of two clamping jaws that can be pressed against one another by means of a tensioning device and actuating devices for the tensioning device that are provided on the travel path.

Bei einer bekannten Einziehvorrichtung dieser Art (AT-B-248364) werden die Klemmbacken der Klemmeinrichtung durch zwei Klemmwalzen gebildet, die endseitig in einem gemeinsamen Rahmen exzentrisch gelagert sind und durch ein gegenseitiges Verdrehen den zwischen sie eingeführten Bandanfang festklemmen, so dass das eingeklemmte Band mit Hilfe von an den Lagerrahmen angeschlossenen Zugmitteln zwischen den Rollen oder Walzen der jeweiligen Gerüste der Bearbeitungsanlage hindurchgezogen werden kann. Die Klemmwalzen sind dabei endseitig über ein Zahnradpaar antriebsverbunden und über einen Stellhebel gegensinnig verdrehbar, um die Klemmung des Bandanfanges zwischen den Klemmwalzen automatisch durchzuführen. Zu diesem Zweck sind an der Verfahrstrecke Betätigungsvorrichtungen vorgesehen, die eine Anlaufkurve für den Stellhebel aufweisen, so dass beim Vorbeifahren der Klemmeinrichtung an den Betätigungsvorrichtungen der Stellhebel durch die Anlaufkurve verdreht wird und die Klemmwalzen im Klemmsinn verstellt. Ober eine entsprechend anders geneigte Anlaufkurve kann die Klemmeinrichtung wieder geöffnet werden.In a known retraction device of this type (AT-B-248364), the clamping jaws of the clamping device are formed by two clamping rollers, which are eccentrically supported at the ends in a common frame and, by mutual rotation, clamp the beginning of the tape inserted between them, so that the pinched tape also With the help of traction means connected to the bearing frame, it can be pulled between the rollers of the respective stands of the processing system. The pinch rollers are drive-connected at the end via a pair of gearwheels and can be rotated in opposite directions via an adjusting lever in order to automatically clamp the beginning of the belt between the pinch rollers. For this purpose, actuating devices are provided on the travel path, which have a starting curve for the actuating lever, so that when the clamping device moves past the actuating devices, the actuating lever is rotated by the starting curve and the clamping rollers are adjusted in the clamping direction. The clamping device can be opened again via a correspondingly differently inclined starting curve.

Nachteilig bei dieser bekannten Vorrichtung ist jedoch, dass aufgrund der Exzenterklemmen-Bauart eine vergleichsweise grosse Bauhöhe der Klemmeinrichtung erforderlich ist, was eine besonders weite öffnungsmöglichkeit der Gerüste voraussetzt. Ausserdem kann nur eine vom vorgegebenen Verdrehwinkel der Exzenterklemme abhängige Klemmkraft aufgebracht werden, die Durchbiegungen der Klemmwalzen oder Dickenunterschiede des zu klemmenden Bandes unberücksichtigt lässt. Eine solche Einziehvorrichtung ist daher auch für das Einfädeln von in Längsstreifen unterteilten Bändern ungeeignet.A disadvantage of this known device, however, is that, due to the type of eccentric clamps, a comparatively large overall height of the clamping device is required, which requires the scaffolds to be opened particularly widely. In addition, only a clamping force dependent on the predetermined angle of rotation of the eccentric clamp can be applied, which does not take into account deflections of the clamping rollers or differences in thickness of the strip to be clamped. Such a pull-in device is therefore also unsuitable for threading tapes divided into longitudinal strips.

Um eine von der aufgebrachten Zugkraft abhängige Klemmkraft zu erreichen, sind Ziehvorrichtungen bekanntgeworden (US-A-5 771 095 und 874953), bei denen die beiden Klemmbakken über eine Lasche nach Art einer Zange gelenkig miteinander verbunden sind, wobei zur Betätigung dieser Klemmzangen Schliessnocken dienen, die an ein Zugmittel angeschlossen sind und zwischen die Betätigungshebel der Zange greifen, so dass beim Verfahren der Schliessnocken die mit entgegen der Ziehrichtung zusammenlaufenden Schliesskurven versehenen Betätigungshebel der Klemmzange durch die Schliessnocken auseinandergedrückt und damit die Klemmbacken zusammengedrückt werden. Hohe Schliessdrücke verlangen jedoch bei diesen bekannten Klemmzangen geeignete Hebelübersetzungen, was vergleichsweise lange Betätigungshebel bedingt, die wiederum entsprechend weit geöffnet werden müssen. Die Bauhöhe kann daher nicht unter ein bestimmtes Mass gesenkt werden. Abgesehen davon ist die Klemmkraft ausschliesslich von der Zugkraft abhängig, so dass auch beim Fehlen einer Zugkraft keine Klemmkraft vorhanden ist. Um ein Lockerwerden der Klemmung des Bandanfanges zu vermeiden, müssen folglich diese Klemmzangen im Bereich der Selbsthemmung betrieben werden, wobei jedoch die Lockerungsgefahr gerade bei einem neuerlichen Verfahren der Klemmeinrichtung nach einem Stillstand nicht ausgeschlossen werden kann. Ausserdem wird auch bei dieser Vorrichtung die Bandklemmung durch unterschiedliche Bandstärken und Durchbiegungen der Klemmbacken nachteilig beeinflusst.In order to achieve a clamping force dependent on the applied tensile force, pulling devices have become known (US Pat. Nos. 5,771,095 and 874953) in which the two clamping jaws are connected to one another in an articulated manner by means of a pair of pliers, closing cams being used to actuate these clamping pliers , which are connected to a traction device and engage between the actuating levers of the pliers, so that when the closing cams are moved, the actuating levers of the clamping pliers provided with closing curves running counter to the direction of pull are pressed apart by the closing cams and thus the clamping jaws are pressed together. However, high closing pressures require suitable lever ratios in these known clamping pliers, which requires comparatively long actuating levers, which in turn have to be opened correspondingly wide. The overall height cannot therefore be reduced below a certain level. Apart from this, the clamping force is exclusively dependent on the pulling force, so that there is no clamping force even when there is no pulling force. In order to avoid loosening of the clamping of the beginning of the tape, these clamping pliers must consequently be operated in the area of self-locking, although the risk of loosening cannot be ruled out precisely when the clamping device is moved again after a standstill. In addition, the band clamping is also adversely affected in this device by different band thicknesses and deflections of the clamping jaws.

Darüber hinaus ist eine Draht- und Stangenziehzange bekannt (DE-A-920662), bei der das zu klemmende Werkstück mit Hilfe einer exzentrisch gelagerten Scheibe bzw. einem Nocken gegen einen festen Klemmkörper gedrückt wird. Aufgrund der exzentrischen Lagerung der Scheibe bzw. der Nockenform wird auch bei dieser Konstruktion die Klemmkraft von der auf die Zange ausgeübten Zugkraft mitbestimmt, weil bei einer Relativbewegung zwischen Zange und Ziehgut die exentrische Scheibe bzw. der Nokken im Sinne einer Klemmkrafterhöhung von dem Ziehgut verschwenkt wird. Eine Bewegung der Zange gegen die Ziehrichtung öffnet die Klemmbacken selbsttätig. Um den erforderlichen Reibungsschluss zwischen dem Ziehgut und der Ziehzange sicherzustellen, was vor allem nach dem Nachlassen der Zugkraft von Bedeutung ist, kann die exzentrische Scheibe bzw. der Klemmnocken über einen federbelasteten Hebel mit einem Drehmoment im Schliesssinn beaufschlagt werden, so dass die exzentrische Scheibe bzw. der Klemmnocken auf alle Fälle am Ziehgut anliegt. Die Klemmkraft wird aber nicht durch diese Feder, sondern durch die Keilwirkung beim Verdrehen der Klemmscheibe bzw. des Klemmnockens aufgebracht. Da bei dieser bekannten Konstruktion exzentrisch gelagerte Scheiben oder Nocken vorgesehen sind, ergibt sich zunächst eine vergleichsweise grosse Bauhöhe, die das Einführen des Ziehgutes in einen Walzspalt erschwert. Ausserdem ist eine Betätigung der Spanneinrichtung unabhängig von der Zugbelastung der Zange nicht möglich.In addition, wire and rod pulling pliers are known (DE-A-920662), in which the workpiece to be clamped is pressed against a fixed clamping body with the aid of an eccentrically mounted disc or a cam. Due to the eccentric mounting of the disc or the cam shape, the clamping force is also determined in this construction by the tensile force exerted on the pliers, because with a relative movement between the pliers and the material to be drawn, the eccentric disc or the cam is pivoted from the material to be drawn in order to increase the clamping force . Moving the pliers against the pulling direction opens the jaws automatically. In order to ensure the required frictional connection between the material to be drawn and the drawing pliers, which is particularly important after the tensile force has decreased, the eccentric disc or the clamping cams can be acted upon by a torque in the closing direction via a spring-loaded lever, so that the eccentric disc or . the clamping cam is in any case in contact with the drawing material. The clamping force is not applied by this spring, but by the wedge effect when turning the clamping disc or the clamping cam. Since eccentrically mounted disks or cams are provided in this known construction, there is initially a comparatively large overall height, which makes it difficult to insert the drawn material into a roll gap. In addition, actuation of the clamping device is not possible regardless of the tensile load on the pliers.

Ähnliche Schwierigkeiten treten auch bei einer anderen bekannten Spannkonstruktion auf (FR-A-1 113034), bei der die auf das Ziehgut auszu- übende Klemmkraft durch in einem Käfig gehaltene Spannkugeln od. dgl. erreicht wird. Diese Spannkugeln wirken nämlich mit einem Innenkegel zusammen, dem gegenüber der Käfig in axialer Richtung verschiebbar ist. Wird nun der Käfig über die am Ziehgut anliegenden Spannkugeln gegen die Spitze des Innenkegels hin verschoben, so wird das Ziehgut durch die Spannkugeln festgeklemmt. Zum Lösen der Klemmeinrichtung muss das Ziehgut gegensinnig bewegt werden. Damit die Spannkugeln tatsächlich am Ziehgut anliegen, ist wiederum eine Feder vorgesehen, die den Käfig für die Spannkugeln im Schliessungssinn beaufschlagt. Abgesehen davon, dass eine solche Klemmeinrichtung nur für stangen- oder drahtförmiges Ziehgut geeignet ist, hängt die Klemmkraft von der aufgebrachten Zugkraft ab, was, wie bereits ausgeführt wurde, beim Aufbringen der Zugkraft zu Schwierigkeiten führen kann. Ausserdem ist eine flache Bauweise aufgrund der in einem Innenkegel angeordneten, in einem verschiebbaren Käfig gehaltenen Spannkugeln nicht erreichbar.Similar difficulties also occur with another known tensioning construction (FR-A-1 113034), in which the clamping force to be exerted on the drawing material is achieved by tensioning balls or the like held in a cage. These balls have an inside cone together, against which the cage is displaceable in the axial direction. If the cage is now moved towards the tip of the inner cone via the clamping balls lying against the drawing material, the drawing material is clamped by the clamping balls. To release the clamping device, the drawn material must be moved in opposite directions. So that the clamping balls actually rest on the drawn material, a spring is again provided, which acts on the cage for the clamping balls in the direction of closure. Apart from the fact that such a clamping device is only suitable for rod-shaped or wire-shaped drawing material, the clamping force depends on the applied tensile force, which, as has already been stated, can lead to difficulties when applying the tensile force. In addition, a flat design cannot be achieved due to the tension balls arranged in an inner cone and held in a displaceable cage.

Schliesslich ist eine Vorschubzange bekannt (DE-U-70 33 145), bei der die Vorspannung einer Feder für den Schliessdruck mittels eines Exzenters verstellt werden kann, um beim Öffnen der Klemmbacken nicht die volle Klemmkraft überwinden zu müssen. Die Klemmbacken können daher durch eine schwächere Feder auseinandergedrückt werden, wenn die Vorspannung der Schliessfeder herabgesetzt wird. Nachteilig bei dieser bekannten Vorschubzange ist, dass ein vergleichsweise hoher Konstruktionsaufwand mit einer grösseren Bauhöhe erforderlich ist, was den Einsatz dieser Vorschubzangen für Einziehvorrichtungen von Bandbearbeitungsanlagen ungeeignet macht. Dazu kommt, dass unterschiedliche Banddicken über den zu klemmenden Bandanfang nicht berücksichtigt werden können.Finally, feed pliers are known (DE-U-70 33 14 5 ) in which the pretension of a spring for the closing pressure can be adjusted by means of an eccentric so that the full clamping force does not have to be overcome when the clamping jaws are opened. The jaws can therefore be pushed apart by a weaker spring if the pretension of the closing spring is reduced. A disadvantage of this known feed tongs is that a comparatively high design effort with a greater overall height is required, which makes the use of these feed tongs unsuitable for pulling-in devices of strip processing systems. In addition, different strip thicknesses over the strip beginning to be clamped cannot be taken into account.

Der Erfindung liegt somit die Aufgabe zugrunde, diese Mängel zu vermeiden und eine Einziehvorrichtung für eine Bandbearbeitungsanlage der eingangs geschilderten Art so zu verbessern, dass einerseits eine sehr niedrige Bauhöhe gewährleistet werden kann und anderseits eine unabhängig von der Bandstärke und der Zugkraft wirksame Klemmkraft sichergestellt wird, die auch Durchbiegungen der Klemmbacken oder Dickenunterschiede des zu klemmenden Bandanfanges berücksichtigt.The invention is therefore based on the object of avoiding these deficiencies and of improving a drawing-in device for a strip processing system of the type described at the outset in such a way that on the one hand a very low overall height can be ensured and on the other hand a clamping force which is effective regardless of the strip thickness and the tensile force is ensured, which also takes into account deflections of the clamping jaws or differences in thickness of the beginning of the strip to be clamped.

Diese Aufgabe wird gemäss den Kennzeichenmerkmalen des einzigen Patentanspruches gelöst.This object is achieved according to the characterizing features of the only claim.

Da die Klemmkraft nach dem Erfindungsvorschlag ausschliesslich durch Federn aufgebracht wird, ist diese Klemmkraft selbstverständlich unabhängig von den auf die Klemmeinrichtung einwirkenden Zugkräften oder von der Bandstärke. Ausserdem wird die Bauhöhe allein von der gewünschten Öffnungsweite der Klemmbacken bestimmt, weil durch den Einsatz entsprechend starker Federn nur vergleichsweise kleine Hebelarme erforderlich sind. Als zusätzlicher Vorteil muss der Umstand angesehen werden, dass die Betätigungsvorrichtungen nur im Öffnungssinn auf die Klemmbacken zu wirken haben und nicht auch im Schliessungssinn, was die Konstruktion dieser Betätigungsvorrichtungen einfach macht. Es braucht ja lediglich eine der beiden Klemmbacken gegen die Federkraft niedergedrückt zu werden, wobei die andere Klemmbacke selbstverständlich unnachgiebig abgestützt sein muss.Since the clamping force according to the invention is applied exclusively by springs, this clamping force is of course independent of the tensile forces acting on the clamping device or of the band thickness. In addition, the overall height is determined solely by the desired opening width of the clamping jaws, because the use of appropriately strong springs means that only comparatively small lever arms are required. An additional advantage must be seen in the fact that the actuating devices only have to act on the clamping jaws in the opening direction and not also in the closing direction, which makes the construction of these actuating devices simple. Only one of the two jaws needs to be pressed down against the spring force, the other jaw, of course, having to be relentlessly supported.

Die Relativbewegung der Klemmbacken zueinander wird durch deren zangenartige Verbindung in einfacher Weie sichergestellt, wobei durch diese gelenkige Verbindung der Klemmbacken eindeutige, ein Verkanten ausschliessende Bewegungsverhältnisse vorgegeben sind.The relative movement of the clamping jaws to one another is ensured in a simple manner by their pliers-like connection, with this articulated connection of the clamping jaws providing clear movement conditions which preclude tilting.

Dadurch, dass eine der beiden Klemmbacken in mehrere voneinander unabhängig gelagerte, jeweils für sich federbelastete Klemmstücke unterteilt ist, kann auch bei Vorliegen von unterschiedlichen Blechstärken bzw. von in Längsstreifen unterteilten Bändern oder von sich durchbiegenden Klemmbacken eine bereichsweise Einzelklemmung sichergestellt werden, die eine selbständige Anpassung der Klemmeinrichtung an unterschiedliche Bandstärken mit sich bringt. Darüber hinaus wird durch eine solche Konstruktion der Nachteil einer Balkendurchbiegung vermieden, weil sich die Durchbiegung nur auf vergleichsweise schmale Klemmstücke erstrecken kann.The fact that one of the two clamping jaws is subdivided into several independently mounted, each spring-loaded clamping pieces means that even in the case of different sheet thicknesses or of strips divided into longitudinal strips or of bending jaws, a region-specific individual clamping can be ensured, which enables an independent adjustment of the clamping device with different belt thicknesses. In addition, the disadvantage of beam deflection is avoided by such a construction, because the deflection can only extend to comparatively narrow clamping pieces.

Um einzelne Bandstreifen sicher in den Spannschlitz eines Wickeldorns einführen zu können, ist es bereits bekannt (DD-A-86 359), die Klemmeinrichtung in einzelne Klemmbackenpaare zu unterteilen, doch werden mit diesen Massnahmen nur Anpassungsmöglichkeiten an verschiedene Streifenbreiten sichergestellt, weil die einzelnen Klemmbackenpaare axial verstellbar auf Exzenterwellen gelagert sind. Wegen der fehlenden Zwischenschaltung von 'Klemmfedern ist eine automatische Anpassung an verschiedene Blechstärken nicht möglich.In order to be able to securely insert individual strips of tape into the clamping slot of a winding mandrel, it is already known (DD-A-86 359) to divide the clamping device into individual pairs of jaws, but these measures only ensure options for adapting to different strip widths because the individual pairs of jaws are axially adjustable on eccentric shafts. Due to the missing interposition of 'clamping springs, automatic adaptation to different sheet thicknesses is not possible.

Schliesslich muss noch erwähnt werden, dass durch das Vorsehen der Klemmfedern eine einfache Nachstellung der Klemmkraft gegeben ist, weil zu diesem Zwecke lediglich die Vorspannung der Federn verändert werden muss, Es kann somit bei geringer Bauhöhe eine grosse Klemmkraft erzeugt werden, die unabhängig von der aufgebrachten Zugkraft wirksam ist und von Balkendurchbiegungen und Abnützungen der Klemmbacken unbeeinflusst bleibt.Finally, it must also be mentioned that the provision of the clamping springs provides a simple readjustment of the clamping force, because for this purpose only the preload of the springs has to be changed. A large clamping force can thus be generated with a low overall height, regardless of the applied one Tensile force is effective and remains unaffected by beam deflections and wear on the clamping jaws.

In der Zeichnung ist der Erfindungsgegenstand in einem Ausführungsbeispiel dargestellt.In the drawing, the subject of the invention is shown in one embodiment.

Es zeigen

  • Fig. 1 eine erfindungsgemässe Einziehvorrichtung für eine Bandbearbeitungsanlage in Draufsicht auf die Klemmeinrichtung,
  • Fig. 2 einen Schnitt nach der Linie 11-11 der Gig. 1,
  • Fig. 3 einen Schnitt nach der Linie III-III der Fig. 1,
  • Fig. 4 eine auf die Klemmeinrichtung wirkende Betätigungsvorrichtung in Seitenansicht in einem kleineren Massstab und
  • Fig. '5 eine der Fig. 4 entsprechende Darstellungsart einer anderen Betätigungsvorrichtung.
Show it
  • 1 is a pull-in device according to the invention for a strip processing system in plan view of the clamping device,
  • Fig. 2 shows a section along the line 11-11 of the gig. 1,
  • 3 shows a section along the line III-III of FIG. 1,
  • Fig. 4 is an actuating device acting on the clamping device in side view on a smaller scale and
  • Fig. '5 a of FIG. 4 corresponding representation of another actuator.

Die dargestellte Einziehvorrichtung besteht im wesentlichen aus einer Klemmeinrichtung 1, die zwei Klemmbacken 2 und 3 besitzt. Diese Klemmbacken 2 und 3 sind über Gelenkbolzen 4 miteinander nach Art einer Zange verbunden und werden mit Hilfe einer Feder 5 im Schliessungssinn belastet. Die Feder 5 besteht im Ausführungsbeispiel aus einem Tellerfederpaket, wie dies insbesondere Fig. 2 zeigt.The drawing device shown consists essentially of a clamping device 1, which has two clamping jaws 2 and 3. These clamping jaws 2 and 3 are connected to one another via hinge pins 4 in the manner of a pair of pliers and are loaded by means of a spring 5 in the direction of closure. In the exemplary embodiment, the spring 5 consists of a plate spring assembly, as is shown in particular in FIG. 2.

Um Dickenunterschiede der zu klemmenden Bleche bzw. Durchbiegungen der Klemmbacken ausgleichen zu können, besteht der Klemmbakken 3 aus einzelnen jeweils für sich am anderen Klemmbacken 2 gelagerten Klemmstücken 6, die durch je eine Feder 5 belastet sind, so dass die einzelnen Klemmstücke 6 nur auf vergleichsweise kleine Bereiche des zu klemmenden Bandes wirken. Die Konstruktion ist dabei so ausgeführt, dass jeweils zwei Arme 7 der Klemmstükke 6 durch Ausnehmungen 8 des Klemmbackens 2 ragen. 'Dies ermöglicht die Verwendung einer Druckfeder'5, obwohl die Klemmbacken 2 und 3 nur als einarmige Hebel ausgeführt sind. Dadurch wird eine besonders niedrige Bauhöhe sichergestellt, die im wesentlichen nur von der erwünschten Öffnungsweite der Klemmbacken 2 und 3 abhängt.In order to be able to compensate for differences in thickness of the sheets or deflections of the clamping jaws to be clamped, the clamping jaw 3 consists of individual clamping pieces 6, each of which is mounted on the other clamping jaw 2, which are each loaded by a spring 5, so that the individual clamping pieces 6 are only on a comparative basis small areas of the band to be clamped act. The construction is designed such that two arms 7 of the clamping pieces 6 each protrude through recesses 8 of the clamping jaw 2. 'This enables the use of a compression spring'5, although the jaws 2 and 3 are only designed as one-armed levers. This ensures a particularly low overall height, which essentially depends only on the desired opening width of the clamping jaws 2 and 3.

Ober die Feder '5, die in einem Topf 9 eingesetzt ist, werden die Backen 2 und 3 gegeneinandergedrückt, wobei ein Band 10 zwischen ihnen festgeklemmt werden kann. Zum öffnen der Klemmbacken 2 und 3 sind an der Verfahrstrecke der Klemmeinrichtung 1 Betätigungsvorrichtungen 11 vorgesehen, die gemeinsam oder einzeln auf die Klemmstücke 6 drücken und die Backen gegen die Kraft der Feder 5 öffnen. Die geöffnete Klemmeinrichtung ist in Fig. 3 dargestellt. Um die Klemmbacken 2 und 3 öffnen zu können, muss selbstverständlich die nicht von der Betätigungsvorrichtung 11 beaufschlagte Klemmbacke 2 entsprechend abgestützt werden, was gemäss Fig. 4 und 5 durch eine feste Auflage 12 erreicht wird.The jaws 2 and 3 are pressed against one another via the spring 5, which is inserted in a pot 9, and a band 10 can be clamped between them. To open the clamping jaws 2 and 3, actuating devices 11 are provided on the travel path of the clamping device 1, which press together or individually on the clamping pieces 6 and open the jaws against the force of the spring 5. The opened clamping device is shown in Fig. 3. In order to be able to open the clamping jaws 2 and 3, the clamping jaw 2 not acted upon by the actuating device 11 must of course be supported accordingly, which is achieved by a fixed support 12 according to FIGS. 4 and 5.

Zum Niederdrücken der Klemmstücke 6 besitzt die Betätigungsvorrichtung 11 wenigstens einen Zylinder 13, der nach Fig. 4 einen Exzenter 14 und nach Fig. 5 einen Stellhebel 1'5 betätigt, was jeweils zum öffnen der im Bereich der Betätigungsvorrichtung befindlichen Klemmeinrichtung führt.To depress the clamping pieces 6, the actuating device 11 has at least one cylinder 13, which according to FIG. 4 actuates an eccentric 14 and according to FIG. 5 an actuating lever 1'5, which in each case leads to the opening of the clamping device located in the area of the actuating device.

Um die Klemmwirkung zu erhöhen, sind im Klemmbacken 2 Kerbdorne 16 eingesetzt, die in Bohrungen '17 des Klemmbackens 3 beim Schliessen der Backen eingreifen.In order to increase the clamping effect, 2 notches 16 are inserted in the clamping jaws, which engage in bores ' 17 of the clamping jaw 3 when the jaws are closed.

Zum Verfahren der Kiemmeinrichtung 1 können an seitlichen Ansätzen 18 des Klemmbakkens 2 geeignete Zugmittel angeschlossen werden.Suitable traction means can be connected to the side lugs 18 of the clamping jaw 2 for moving the gill device 1.

Claims (1)

  1. A draw-in apparatus for a strip-processing plant comprising a gripping device (1), which is movable in the drawing-in direction and serves to grip the leading end of the strip and consists of two gripping jaws (2, 3), which are adapted to be forced against each other by a tightener, and actuators (11), which are provided along the path of the gripping device and serve to actuate the tightener, characterized in that the gripping jaws (2, 3) are interconnected like pliers and one of them is composed of a plurality of gripping members (6), which are mounted independently of each other and individually spring- biased in a closing sense, and that the gripping jaws (2, 3) are adapted to be loaded against the spring force by the actuators (11) in an opening sense.
EP19790890069 1979-03-07 1979-12-20 Feeding device for a strip processing apparatus Expired EP0015358B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1704/79 1979-03-07
AT170479A AT368041B (en) 1979-03-07 1979-03-07 PULL-IN DEVICE FOR A TAPE MACHINING SYSTEM

Publications (2)

Publication Number Publication Date
EP0015358A1 EP0015358A1 (en) 1980-09-17
EP0015358B1 true EP0015358B1 (en) 1982-10-20

Family

ID=3519170

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790890069 Expired EP0015358B1 (en) 1979-03-07 1979-12-20 Feeding device for a strip processing apparatus

Country Status (3)

Country Link
EP (1) EP0015358B1 (en)
AT (1) AT368041B (en)
DE (1) DE2963909D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1306461B1 (en) * 1998-01-30 2001-06-11 Dallan Srl PERFECTED FEEDER OF SHEET TAPE
CN108480406B (en) * 2018-06-06 2023-11-03 太原科技大学 Sliding type short slab pushing device of slab band rolling mill

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT248364B (en) * 1964-10-12 1966-07-25 Voest Ag Pull-in device for systems that process strip material
US3430779A (en) * 1967-10-16 1969-03-04 Verson Allsteel Press Co Transfer assembly for a press
US3556376A (en) * 1969-03-10 1971-01-19 Entarea Investment Management Hitch feed
DE7033145U (en) * 1970-09-05 1970-12-03 Kaiser Kg Otto CONTROLLED FEED COLLET

Also Published As

Publication number Publication date
AT368041B (en) 1982-08-25
EP0015358A1 (en) 1980-09-17
DE2963909D1 (en) 1982-11-25
ATA170479A (en) 1982-01-15

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