EP0253205B1 - Device for intermittent feed of strip with two opposed driven feeding rollers - Google Patents

Device for intermittent feed of strip with two opposed driven feeding rollers Download PDF

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Publication number
EP0253205B1
EP0253205B1 EP87109454A EP87109454A EP0253205B1 EP 0253205 B1 EP0253205 B1 EP 0253205B1 EP 87109454 A EP87109454 A EP 87109454A EP 87109454 A EP87109454 A EP 87109454A EP 0253205 B1 EP0253205 B1 EP 0253205B1
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EP
European Patent Office
Prior art keywords
feed roller
forward feed
strip material
rocker
steering element
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
EP87109454A
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German (de)
French (fr)
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EP0253205A3 (en
EP0253205A2 (en
Inventor
Alfred Bareis
Klaus Göbel
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L Schuler GmbH
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L Schuler GmbH
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Publication date
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Publication of EP0253205A2 publication Critical patent/EP0253205A2/en
Publication of EP0253205A3 publication Critical patent/EP0253205A3/en
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Publication of EP0253205B1 publication Critical patent/EP0253205B1/en
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Classifications

    • 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
    • B65H20/02—Advancing webs by friction roller
    • B65H20/04—Advancing webs by friction roller to effect step-by-step advancement of web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, 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
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
    • B21D43/09—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers by one or more pairs of rollers for feeding sheet or strip material

Definitions

  • the invention relates to a device for the step-by-step feeding of strip material with two feed rollers driven in opposite directions, a first feed roller being mounted in a fixed position and a second feed roller by means of a lifting device, alternately at the time the direction of rotation reverses, at least one of the feed rollers against the other feed roller or away from it is movable into a return position, the second feed roller being rotatably mounted in a rocker, at one end of which a link element of the lifting device engages and at the other end, opposite the axis of the second feed roller, a spring force mechanism engages in the effective direction of the pressure of the second feed roller the first feed roller.
  • a device according to this type is known from DE-C-2241686.
  • Devices of this type work in time e.g. a press and serve to feed strip material to the tool in the press. It is necessary to feed the strip material discontinuously in the same strip lengths. Depending on the type of tool, e.g. when using a follow-up cutting tool, it is also necessary to work with intermediate ventilation of the feed rollers and the pressure element at the bottom dead center of the press ram. In addition, the feed device is to be driven with strip materials of different thicknesses.
  • a feed device without freewheels and brakes for the feed rollers to be used has been described, in which the strip material is held in the feed breaks and released during the feed phases.
  • the device looks to be released during the feed phases.
  • the device provides two oppositely driven feed rollers, of which a first feed roller is mounted stationary and a second feed roller is movable by means of a lifting device at the time of reversing the direction of rotation against the other feed roller or away from it in a return position.
  • the second feed roller is rotatably mounted on a rocker. At one end of the rocker the lifting device engages via a link element, at the other end a compression spring which acts in the direction of the pressure of the second feed roller on the first feed roller.
  • a stationary link is connected to the rocker between the second feed roller and the point of application of the compression spring.
  • a pressure element is carried, which is guided in the return position of the second feed roller against a stationary counter-element to hold the strip material.
  • the handlebar element is placed on a cam follower via a cam follower, which is rotated directly by the main drive.
  • the rotary movement of the feed rollers is oscillating forwards and backwards via a connecting rod drive which can be changed with regard to the amplitude of the rotary movement.
  • the rocker is supported on both ends by springs.
  • the springs cause the rocker to pivot into the return position with a corresponding cam follower position, the second feed roller being lifted off the strip material while the pressure element is guided against a stop with the strip material being interposed. If the rocker is pivoted further, it can optionally run against a pivot point, which means that the pressure element can be lifted off for intermediate ventilation.
  • the feed device can be used for different strip material thicknesses.
  • the spring for returning the curve follower on the curve works when the intermediate air device is inserted against the pressure spring for the second feed roller, while both springs act together in one direction of action on the rocker until the rocker hits the pivot point. Belt materials of different thicknesses require manual adjustment of the feed device and they cause different spring forces. A thicker strip material increases the contact pressure of the second feed roller, while the force of the spring acting against this spring in the articulation point of the link element is reduced.
  • a handlebar engages, which is mounted with its other end approximately at the height of the center of the second feed roller in a stationary and rotatable manner that with the handlebar a pressure member is connected, which is pressed in the return position of the second feed roller with the interposition of the strip material against a stationary counter-member to hold the strip material during the return movement of the first feed roller, and that a connecting rod engages the handlebar element at a distance from its point of attack on the seesaw essentially parallel to the rocker and running in the direction of this in a fixed bearing via an eccentric.
  • the feed rollers open and close when the strip material is at a standstill, and that when the thickness of the strip material changes and the adaptation of the lifting device is necessary, the operating conditions of this lifting device constructed in the manner of a four-bar linkage do not change.
  • the tape feed device is independent of the tape thickness.
  • the contact and lifting movements of the second feed roller and the pressing operation on or from the strip material and the contact of the link element with a fixed stop is carried out by the movement of a single actuator.
  • the strip material 1 is advanced in the direction of arrow 20 step by step by a certain, adjustable amount.
  • the feed takes place by means of feed rollers 2 and 3, of which the feed roller 2, as shown, can be designed as a segment and is mounted in a fixed rotary bearing so that it can be swung back and forth via an oscillating shaft 10.
  • the feed roller 3, which can be both a driving, press-driven roller and a roller that is driven by the strip material 1, that is to say can also run, is rotatably mounted on a rocker 6 at 11.
  • the rocker 6 is from a spring energy store such as a pressure cylinder or, as shown, loaded by a compression spring 12 in an end part 8 (arrow 13) for pressing the feed roller 3 against the strip material 1 and for stabilizing the lifting device, which is numbered 4 overall.
  • the rocker 6 is rigidly connected to a link element 9 in the region of its second end part 7 at 26. Between this point of attack 26 of the handlebar element 9 on the rocker 6 and the feed roller 3 there is a common pivot point 14 for a stationary in a bearing 17 at 16 rotatably mounted handlebar 15 and a fixed at 32 longitudinally guided, rotatable pressing member 18.
  • the crowned bottom 29 of the Pressure element 18 is fixed in position opposite an opposing element 19.
  • the belt-side underside 31 in the end part 27 of the link element 9 is at the side opposite to the belt guide of the belt material 1 at least one height-adjustable stop 28, for example a manually or also motor-adjustable eccentric.
  • a connecting rod 22 Spaced from the point of engagement 26 of the handlebar 9 on the rocker 6, a connecting rod 22 is mounted on the handlebar 9 in a pivot bearing 21, which is guided at the other end via an eccentric 24 and an eccentric shaft 25 in a fixed bearing point at 23.
  • an adjusting means 33 for example a pressure cylinder, can engage in the direction of action of the arrow 34.
  • the frame to which the fixed points 10, 17, 23 and 28 refer is generally numbered 5.
  • the eccentric shaft 25 is driven via a bevel gear 43, 44, the vibrating shaft 10 e.g. via a vibratory drive, as described in DE-OS 21 14 432.
  • a vibratory drive as described in DE-OS 21 14 432.
  • These two drives are shown in simplified form.
  • a press rotatably driven shaft 36 with a splined hub profile is axially movably guided, which transmits the rotary movement of the hollow shaft 36 to a screw bushing 39 via a universal joint 37.
  • the screw bushing 39 is rigidly connected to a further spline shaft 42.
  • the fixedly mounted bevel gear 43 is guided on the spline shaft 42 and cooperates with the bevel gear 44 on the eccentric shaft 25.
  • the rotary drive coming from the press is thus transferred directly to the eccentric shaft 25.
  • a pair of handlebars 46 is attached via a rotary joint 45.
  • a further pair of handlebars 47 is articulated on the downward second end part of the pair of handlebars 46 via a universal joint arrangement 48, which is articulated on both sides of the oscillating shaft 10 by a swivel joint 49 with its opposite end part.
  • adjusting means 41 e.g. a hydraulic motor, adjustable.
  • the actuating means 41 acts via a worm 35 on a stationary ring nut 40 screwed onto the screw bush 39, the rotation of which causes an axial adjustment of the screw bush 39 in the ring nut 40.
  • the maximum deflection 50 and the minimum deflection 51 which correspond to the positions 53 and 54 of the handlebar pairs 46, 47, are indicated on the oscillating shaft 10.

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

Description

Die Erfindung betrifft eine Vorrichtung zum schrittweisen Vorschieben von Bandmaterial mit zwei gegenläufig angetriebenen Vorschubwalzen, wobei eine erste Vorschubwalze ortsfest gelagert und eine zweite Vorschubwalze vermittels einer Abhebeeinrichtung abwechselnd jeweils im Zeitpunkt der Emkehr der Drehrichtung zumindest einer der Vorschubwalzen gegen die andere Vorschubwalze bzw. von dieser weg in eine Rücklaufstellung bewegbar ist, wobei die zweite Vorschubwalze in einer Wippe drehbar gelagert ist, an deren einem Ende ein Lenkerelement der Abhebeeinrichtung angreift und an deren anderem, bezüglich der Achse der zweiten Vorschubwalze gegenüberliegendem Ende ein Federkraftspeicher angreift in Wirkrichtung des Andruckes der zweiten Vorschubwalze an die erste Vorschubwalze. Eine Vorrichtung gemäß dieser Gattung ist aus der DE-C-2241686 bekannt.The invention relates to a device for the step-by-step feeding of strip material with two feed rollers driven in opposite directions, a first feed roller being mounted in a fixed position and a second feed roller by means of a lifting device, alternately at the time the direction of rotation reverses, at least one of the feed rollers against the other feed roller or away from it is movable into a return position, the second feed roller being rotatably mounted in a rocker, at one end of which a link element of the lifting device engages and at the other end, opposite the axis of the second feed roller, a spring force mechanism engages in the effective direction of the pressure of the second feed roller the first feed roller. A device according to this type is known from DE-C-2241686.

Vorrichtungen dieser Art arbeiten im Takt z.B. einer Presse und dienen dazu, Bandmaterial dem Werkzeug in der Presse zuzuführen. Hierbei ist es erforderlich, das Bandmaterial in gleichen Bandlängen diskontinuierlich vorzuschieben. In Abhängigkeit von der Art des Werkzeuges, z.B. bei Verwendung eines Folgeschnittwerkzeuges, ist es weiterhin erforderlich, im unteren Totpunkt des Pressenstößels mit einer Zwischenlüftung der Vorschubwalzen und des Anpreßorganes zu arbeiten. Darüberhinaus est die Vorschubvorrichtung mit Bandmaterialien unterschiedlicher Dicke zu fahren.Devices of this type work in time e.g. a press and serve to feed strip material to the tool in the press. It is necessary to feed the strip material discontinuously in the same strip lengths. Depending on the type of tool, e.g. when using a follow-up cutting tool, it is also necessary to work with intermediate ventilation of the feed rollers and the pressure element at the bottom dead center of the press ram. In addition, the feed device is to be driven with strip materials of different thicknesses.

In der DE-C 22 41 686 ist eine Vorschubvorrichtung ohne Freiläufe und Bremsen für die zu verwendenden Vorschubwalzen beschrieben worden, bei der das Bandmaterial in den Vorschubpausen festgehalten und während der Vorschubphasen freigegeben wird. Die Vorrichtung sieht während der Vorschubphasen freigegeben wird. Die Vorrichtung sieht hierbei zwei gegenläufig angetriebene Vorschubwalzen vor, von denen eine erste Vorschubwalze ortsfest gelagert und eine zweite Vorschub walze vermittels einer Abhebeeinrichtung jeweils im Zeitpunkt der Umkehr der Drehrichtung gegen die andere Vorschubwalze bzw. von dieser weg in eine Rücklaufstellung bewegbar ist. Die zweite Vorschubwalze ist hierzu auf einer Wippe drehbar gelagert. An dem einen Ende der Wippe greift die Abhebeeinrichtung über ein Lenkerelement an, an dem anderen Ende eine Druckfeder, die in Wirkrichtung des Andruckes der zweiten Vorschubwalze an die erste Vorschubwalze wirkt. Zwischen der zweiten Vorschubwalze und dem Angriffspunkt der Druckfeder ist ein ortsfest gelagerter Lenker mit der Wippe verbunden. Mit dem Lenker ist ein Anpreßorgan mitgeführt, das in Rücklaufstellung der zweiten Vorschubwalze gegen ein ortsfestes Gegenorgan geführt ist zum Festhalten des Bandmaterials. Das Lenkerelement ist über einen Kurvenfolger an eine Steuerkurve gelegt, die von dem Hauptantrieb direkt gedreht wird. Die Drehbewegung der Vorschubwalzen ist über einen hinsichtlich der Amplitude der Drehbewegung veränderbaren Pleuelantrieb oszillierend vor- und rücklaufend. Die Wippe ist beidendig durch Federn abgestützt. Die Federn bewirken ein Verschwenken der Wippe in die Rücklaufposition bei entsprechender Kurvenfolgerstellung, wobei die zweite Vorschubwalze von dem Bandmaterial abgehoben wird, während das Anpreßorgan gegen einen Anschlag unter Zwischenlage des Bandmaterials geführt wird. Bei weiterem Verschwenken der Wippe kann diese wahlweise gegen einen Schwenkpunkt auflaufen, woduch das Anpreßorgan für ein Zwischenlüften mit abgehoben werden kann. Durch Veränderung der Anlenkung des Lenkerelementes ist die Vorschubvorrichtung für verschiedene Bandmaterialstärken verwendbar. Die Feder zum Rückführen des Kurvenfolgers auf der Kurve arbeitet bei dem Einsetzen der Zwischenlüfteinrichtung gegen die Andruckfeder für die zweite Vorschubwalze an, während beide Federn gemeinsam bis zum Auflaufen der Wippe auf dem Schwenkpunkt an der Wippe in einer Wirkrichtung angreifen. Unterschiedlich dicke Bandmaterialien erfordern ein manuelles Nachstellen der Vorschubvorrichtung und sie bewirken hierbei unterschiedliche Federkräfte. Ein dickeres Bandmaterial erhöht die Anpreßkraft der zweiten Vorschubwalze, während sich die Kraft der gegen diese Feder wirkenden Feder im Anlenkpunkt des Lenkerelementes verringert.In DE-C 22 41 686 a feed device without freewheels and brakes for the feed rollers to be used has been described, in which the strip material is held in the feed breaks and released during the feed phases. The device looks to be released during the feed phases. The device provides two oppositely driven feed rollers, of which a first feed roller is mounted stationary and a second feed roller is movable by means of a lifting device at the time of reversing the direction of rotation against the other feed roller or away from it in a return position. For this purpose, the second feed roller is rotatably mounted on a rocker. At one end of the rocker the lifting device engages via a link element, at the other end a compression spring which acts in the direction of the pressure of the second feed roller on the first feed roller. A stationary link is connected to the rocker between the second feed roller and the point of application of the compression spring. With the handlebar a pressure element is carried, which is guided in the return position of the second feed roller against a stationary counter-element to hold the strip material. The handlebar element is placed on a cam follower via a cam follower, which is rotated directly by the main drive. The rotary movement of the feed rollers is oscillating forwards and backwards via a connecting rod drive which can be changed with regard to the amplitude of the rotary movement. The rocker is supported on both ends by springs. The springs cause the rocker to pivot into the return position with a corresponding cam follower position, the second feed roller being lifted off the strip material while the pressure element is guided against a stop with the strip material being interposed. If the rocker is pivoted further, it can optionally run against a pivot point, which means that the pressure element can be lifted off for intermediate ventilation. By changing the articulation of the link element, the feed device can be used for different strip material thicknesses. The spring for returning the curve follower on the curve works when the intermediate air device is inserted against the pressure spring for the second feed roller, while both springs act together in one direction of action on the rocker until the rocker hits the pivot point. Belt materials of different thicknesses require manual adjustment of the feed device and they cause different spring forces. A thicker strip material increases the contact pressure of the second feed roller, while the force of the spring acting against this spring in the articulation point of the link element is reduced.

Demgegenüber ist es Aufgabe der Erfindung, die Bewegungen der Wippe in den Vorlauf- und Rücklaufstellungen zwangzuführen.In contrast, it is an object of the invention to force the movements of the rocker in the forward and reverse positions.

Diese Aufgabe ist nach der Erfindung dadurch gelöst, daß zwischen der zweiten Vorschubwalze und dem Angriffspunkt des Lenkerelementes an der Wippe ein Lenker angreift, der mit seinem anderen Ende in etwa der Höhe der Mitte der zweiten Vorschubwalze ortsfest und drehbeweglich gelagert ist, daß mit dem Lenker ein Anpreßorgan verbunden ist, das in Rücklaufstellung der zweiten Vorschubwalze unter Zwischenlage des Bandmaterials gegen ein ortsfestes Gegenorgan gedrückt ist zum Festhalten des Bandmaterials während der Rücklaufbewegung der ersten Vorschubwalze, und daß an dem Lenkerelement beabstandet zu dessem Angriffspunkt an der Wippe eine Pleuelstange angreift, die im wesentlichen parallel zu der Wippe und in Richtung dieser verlaufend in einem ortsfesten Lager über einen Exzenter anzutreiben ist.This object is achieved according to the invention in that between the second feed roller and the point of application of the handlebar element on the rocker a handlebar engages, which is mounted with its other end approximately at the height of the center of the second feed roller in a stationary and rotatable manner that with the handlebar a pressure member is connected, which is pressed in the return position of the second feed roller with the interposition of the strip material against a stationary counter-member to hold the strip material during the return movement of the first feed roller, and that a connecting rod engages the handlebar element at a distance from its point of attack on the seesaw essentially parallel to the rocker and running in the direction of this in a fixed bearing via an eccentric.

Von besonderem Vorteil ist hierbei, daß die Vorschubwalzen im Stillstand des Bandmaterials öffnen und schließen und daß sich bei Veränderung der Dicke des Bandmaterials und demzufolge erforderlicher Anpassung der Abhebeeinrichtung die Wirkverhältnisse dieser in Art eines Viergelenkes aufgebauten Abhebeeinrichtung nicht verändern. Die Bandvorschubeinrichtung ist banddickenunabhängig. Die Anlage- und Abhebebewegungen der zweiten Vorschubwalze und des Anpreßorganges an das bzw. von dem Bandmaterial und der Anlage des Lenkerelementes an einem ortsfesten Anschlag erfolgt durch die Bewegung eines einzigen Stellorganes. Die Merkmale der weiteren Ansprüche kennzeichnen erfindungswesentliche und vorteilhafte Ausgestaltungen der Erfindung.It is particularly advantageous here that the feed rollers open and close when the strip material is at a standstill, and that when the thickness of the strip material changes and the adaptation of the lifting device is necessary, the operating conditions of this lifting device constructed in the manner of a four-bar linkage do not change. The tape feed device is independent of the tape thickness. The contact and lifting movements of the second feed roller and the pressing operation on or from the strip material and the contact of the link element with a fixed stop is carried out by the movement of a single actuator. The features of the further claims characterize advantageous and advantageous embodiments of the invention.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispieles wird im folgenden die Erfindung beschrieben. Es zeigen

  • Fig. 1 eine Abhebevorrichtung in vereinfachter Darstellung,
  • Fig. 2 eine Antriebseinrichtung für die Abhebevorrichtung und den Vorschubwalzenlauf nach Fig. 1,
  • Fig. 3 ein Wirkschema der Abhebevorrichtung nach Fig. 1 und
  • Fig. 4 bis 6 die durch die Wippe bewirkten Stellungen von Vorschubwalze, Anpreßorgan und Lenkerelement im Vergleich.
The invention is described below using an exemplary embodiment shown in the drawing. Show it
  • 1 is a lifting device in a simplified representation,
  • 2 shows a drive device for the lifting device and the feed roller run according to FIG. 1,
  • Fig. 3 shows an operating diagram of the lifting device according to Fig. 1 and
  • Fig. 4 to 6, the positions caused by the rocker of feed roller, pressure element and link element in comparison.

Entsprechend Fig. 1 wird das Bandmaterial 1 in Richtung des Pfeiles 20 schrittweise um ein bestimmtes, einstellbares Maß vorgeschoben. Der Vorschub erfolgt vermittels Vorschubwalzen 2 und 3, von denen die Vorschubwalze 2, wie gezeigt, als Segment ausgebildet sein kann und in einem ortsfesten Drehlager über eine Schwingwelle 10 vor- und zurückschwingbar gelagert ist. Die Vorschubwalze 3, die sowohl eine treibende, pressengetriebene, als auch eine von dem Bandmaterial 1 getriebene, also mitlaufende Walze sein kann, ist auf einer Wippe 6 bei 11 drehbar gelagert. Die Wippe 6 ist von einem Federkraftspeicher wie z.B. einem Druckzylinder oder, wie dargestellt, durch eine Druckfeder 12 in einem Endteil 8 belastet (Pfeil 13) für einen Andruck der Vorschubwalze 3 an das Bandmaterial 1 und zur Stabilisierung der insgesamt mit 4 bezifferten Abhebeeinrichtung. Die Wippe 6 ist mit einem Lenkerelement 9 im Bereich ihres zweiten Endteiles 7 bei 26 starr verbunden. Zwischen diesem Angriffspunkt 26 des Lenkerelementes 9 an der Wippe 6 und der Vorschubwalze 3 befindet sich ein gemeinsamer Drehpunkt 14 für einen ortsfest in einem Lager 17 bei 16 drehbeweglich gelagerten Lenker 15 und ein ortsfest bei 32 längsgeführtes, drehbewegliches Anpreßorgan 18. Der balligen Unterseite 29 des Anpreßorganes 18 ist ortsfest gegenüber ein Gegenorgan 19 angebracht. Der bandwärts gerichteten Unterseite 31 im Endteil 27 des Lenkerelementes 9 steht seitlich zur Bandführung des Bandmateriales 1 zumindest ein höhenverstellbarer Anschlag 28, beispielsweise ein manuell oder auch motorisch verstellbarer Exzenter gegenüber. Beabstandet zu dem Angriffspunkt 26 des Lenkers 9 an der Wippe 6 ist an dem Lenker 9 in einem Drehlager 21 eine Pleuelstange 22 gelagert, die anderenends über einen Exzenter 24 und eine Exzenterwelle 25 in einem ortsfesten Lagerpunkt bei 23 geführt ist. An einem Punkt des so gebildeten Viergelenkes kann ein Stellmittel 33, beispielsweise ein Druckzylinder in Wirkrichtung des Pfeiles 34 angreifen. Das Gestell, auf das sich die ortsfesten Punkte 10, 17, 23 und 28 beziehen, ist allgemein mit 5 beziffert.1, the strip material 1 is advanced in the direction of arrow 20 step by step by a certain, adjustable amount. The feed takes place by means of feed rollers 2 and 3, of which the feed roller 2, as shown, can be designed as a segment and is mounted in a fixed rotary bearing so that it can be swung back and forth via an oscillating shaft 10. The feed roller 3, which can be both a driving, press-driven roller and a roller that is driven by the strip material 1, that is to say can also run, is rotatably mounted on a rocker 6 at 11. The rocker 6 is from a spring energy store such as a pressure cylinder or, as shown, loaded by a compression spring 12 in an end part 8 (arrow 13) for pressing the feed roller 3 against the strip material 1 and for stabilizing the lifting device, which is numbered 4 overall. The rocker 6 is rigidly connected to a link element 9 in the region of its second end part 7 at 26. Between this point of attack 26 of the handlebar element 9 on the rocker 6 and the feed roller 3 there is a common pivot point 14 for a stationary in a bearing 17 at 16 rotatably mounted handlebar 15 and a fixed at 32 longitudinally guided, rotatable pressing member 18. The crowned bottom 29 of the Pressure element 18 is fixed in position opposite an opposing element 19. The belt-side underside 31 in the end part 27 of the link element 9 is at the side opposite to the belt guide of the belt material 1 at least one height-adjustable stop 28, for example a manually or also motor-adjustable eccentric. Spaced from the point of engagement 26 of the handlebar 9 on the rocker 6, a connecting rod 22 is mounted on the handlebar 9 in a pivot bearing 21, which is guided at the other end via an eccentric 24 and an eccentric shaft 25 in a fixed bearing point at 23. At one point of the four-bar linkage thus formed, an adjusting means 33, for example a pressure cylinder, can engage in the direction of action of the arrow 34. The frame to which the fixed points 10, 17, 23 and 28 refer is generally numbered 5.

Nach Fig. 2 ist die Exzenterwelle 25 über ein Kegelradgetriebe 43, 44 angetrieben, die Schwingelle 10 z.B. über einen Schwingantrieb, wie er in der DE-OS 21 14 432 beschrieben worden ist. Diese beiden Antriebe sind vereinfacht dargestellt. In einer von z.B. einer Presse drehgetriebenen Welle 36 mit Keilnabenprofil ist eine Keilwelle 38 axial beweglich geführt, die über ein Kreuzgelenk 37 die Drehbewegung der Hohlwelle 36 auf eine Schraubbuchse 39 überträgt. Die Schraubbuchse 39 ist mit einer weiteren Keilwelle 42 starr verbunden. Auf der Keilwelle 42 ist das ortsfest gelagerte Kegelrad 43 geführt, das mit dem Kegelrad 44 auf der Exzenterwelle 25 zusammen wirkt. Der von der Presse kommende Drehantrieb wird somit direkt auf die Exzenterwelle 25 übertragen. An dem unteren Ende der Keilwelle 42 ist über je ein Drehgelenk 45 ein Lenkerstangenpaar 46 befestigt. An dem abwärts gerichteten zweiten Endteil des Lenkerstangenpaares 46 ist ein weiteres Lenkerstangenpaar 47 über eine Kreuzgelenkanordnung 48 angelenkt, das mit seinem entgegengesetzten Endteil über je ein Drehgelenk 49 beidseitig an der Schwingwelle 10 angelenkt ist. Durch Veränderung der Höhenlage der Drehgelenkes 45 - Veränderung des Abstandes des Drehgelenkes 45 zu der Schwingwelle 10 - ist das Lenkersystem aus den Lenkerstangenpaaren 46 und 47 zwischen den mit 53 und 54 bezifferten Maximal-und Minimalstellungen verändert. Die höhenmäßige Verstellung der Keilwelle 42 in Richtung des Doppelpfeiles 52 erfolgt über die Schraubbuchse 39. Diese ist mit der Keilwelle 42, dem Kreuzgelenk 37 und der Keilwelle 38 in Richtung des Doppelpfeiles 52 über ein Stellmittel 41, z.B. einen Hydraulikmotor, verstellbar. Das Stellmittel 41 wirkt über eine Schnecke 35 auf eine auf die Schraubbuchse 39 aufgeschraubte, ortsfeste Ringmutter 40, deren Drehung eine axiale Verstellung der Schraubbuchse 39 in der Ringmutter 40 bewirkt. Der maximale Ausschlag 50 under der minimale Ausschlag 51, die den Stellungen 53 und 54 der Lenkerstangenpaare 46, 47 entsprechen, sind an der Schwingwelle 10 angedeutet.According to Fig. 2, the eccentric shaft 25 is driven via a bevel gear 43, 44, the vibrating shaft 10 e.g. via a vibratory drive, as described in DE-OS 21 14 432. These two drives are shown in simplified form. In one of e.g. A press rotatably driven shaft 36 with a splined hub profile is axially movably guided, which transmits the rotary movement of the hollow shaft 36 to a screw bushing 39 via a universal joint 37. The screw bushing 39 is rigidly connected to a further spline shaft 42. The fixedly mounted bevel gear 43 is guided on the spline shaft 42 and cooperates with the bevel gear 44 on the eccentric shaft 25. The rotary drive coming from the press is thus transferred directly to the eccentric shaft 25. At the lower end of the spline shaft 42, a pair of handlebars 46 is attached via a rotary joint 45. A further pair of handlebars 47 is articulated on the downward second end part of the pair of handlebars 46 via a universal joint arrangement 48, which is articulated on both sides of the oscillating shaft 10 by a swivel joint 49 with its opposite end part. By changing the height of the swivel joint 45 - changing the distance between the swivel joint 45 and the oscillating shaft 10 - the handlebar system consisting of the pairs of handlebars 46 and 47 is changed between the maximum and minimum positions numbered 53 and 54. The height adjustment of the spline shaft 42 in the direction of the double arrow 52 takes place via the screw bushing 39. This is with the spline shaft 42, the universal joint 37 and the spline shaft 38 in the direction of the double arrow 52 via an adjusting means 41, e.g. a hydraulic motor, adjustable. The actuating means 41 acts via a worm 35 on a stationary ring nut 40 screwed onto the screw bush 39, the rotation of which causes an axial adjustment of the screw bush 39 in the ring nut 40. The maximum deflection 50 and the minimum deflection 51, which correspond to the positions 53 and 54 of the handlebar pairs 46, 47, are indicated on the oscillating shaft 10.

In Fig. 3 sind die Lenker und Drehlager entsprechend der Fig. 1 beziffert. Die zweite Vorschubwalze 3, deren Achse 11 in den Positionen 11', 11" und 11 " dargestellt ist, liegt für den Vorlauf des Bandmaterials 1 während des Umlaufes des Exzenters 24 aus der mit gleichfalls 24 angedeuteten Position in die Position 24" auf dem Bandmaterial 1 auf, dargestellt durch die Position 11' auf der Wippe 6 und in Fig. 4. Während des Umlaufes des Exzenters 24 über die Position 24' in die Position 24" bewegt sich der gemeinsame Anlenkpunkt 14 für das Anpreßorgan 18 aus der Position 14' in die Position 14", sodaß es kurzfristig zu einem zeitgleichen Berühren von Vorschubwalze 3 und Anpreßorgan 18 mit dem Bandmaterial 1 kommt. Der Anlenkpunkt 21 des Pleuels 22 an dem Lenkerelement 9 bewegt sich hierbei aus der Position 21' in die Position 21" auf einem Kreisbogenteil um die Achse 11 in der Position 11'. Nach dem Durchlaufen des Exzenters 24 durch die Position 24" bewegt sich der Anlenkpunkt 21 aus der Position 21" zunächst auf einem Kreisbogenstück um den Punkt 14" in die Position 21 ", da das Anpreßorgan 18 auf dem Bandmatrial 1 aufliegt. In dieser Zeit bewegt sich die Achse 11 der Vorschubrolle 3 von dem Punkt 11' in den Punkt 11". Die Vorschubrolle 3 hebt somit mit dem Durchlaufen des Exzenters 24 die Position 24" von dem Bandmaterial 1 ab (Fig. 5). Die Weiterdrehung des Exzenters 24 bis in die Position 24" bewirkt eine Auflage des Lenkerelementes 9 auf dem höhenverstellbaren Anschlag 28. Je nach Stellung des Exzenters 28 in Abhängigkeit von dem erforderlichen Maß der Zwischenlüftung kommt das Lenkerelement 9 früher oder später zur Auflage auf dem Anschlag 28 (Fig. 6), so daß die Länge des Kriesbogenstückes zwischen den Positionen 21 " und 21 " hiervon abhängig ist. Mit dem Erreichen der Position 21 " und mit dem Durchlaufen des Punktes 24" des Exzenters 24 hebt sich das Anpreßorgan 18 von dem Bandmaterial 1 ab. Der Anlenkpunkt 14 wird aus der Position 14" in die Position 14" auf einem Kreisbogen um das Lenkerlager 17 herum bewegt. Der Punkt 21 bewegt sich aus der Position 21 " in die Position 21 ". Bei einer weiteren Drehung des Exzenters aus der Position 24' in die Position 24 wird die Lagerstelle 21 auf der zuvor durchschrittenen Bahn zurückbewegt in eine Mittenstellung zwischen den Positionen 21' und 21". Mit dem Erreichen der Position 24 des Exzenters kommen zunächst das Anpreßorgan 18, danach die Vorschubwalze 3 zur Auflage auf dem Bandmaterial 1. Mit dem Beginn des Vorlaufes des Bandmateriales 1, etwa in der Position 24 des Exzenters muß das Anpreßorgan 18 von dem Bandmaterial 1 erneut abgehoben haben. Für den Fall, daß eine Zwischenlüftung nicht erforderlich ist, wird der Exzenter 28 soweit zurückgestellt, daß die Unterkante 31 des Lenkerelementes 9 nicht mit dem Exzenter 28 in Berührung kommt. Der Anlenkpunkt 21 der Pleuelstange 22 bewegt sich für diesen Fall auf einem verlängerten Bahnstück des Kreisbogens um den Anlenkpunkt 14 in der Position 14" von der Position 21 bis in die Position 21 ".

  • Fig. 4. zeigt die gegen die Vorschubwalze 2 gepreßte Auflage der Vorschubwalze 3 unter Zwischenlage des Bandmaterials 1, also für den Vorschub des Bandmateriales 1 während des Exzenterumlaufes aus der Position 24 in die Position 24".
  • Fig. 5 zeigt den Zeitraum des Zurücklaufens der Vorschubwalze 2, in dem das Bandmaterial 1 zwischen dem Anpreßorgan 18 und dem Gegenorgan 19 zu halten ist.
  • Fig. 6 zeigt den Zeitraum bei Stillstand des Bandmaterials 1, in dem ein Zwischenlüften erfolgt.
In Fig. 3 the handlebars and pivot bearings are numbered according to Fig. 1. The second feed roller 3, the axis 11 of which is shown in the positions 11 ', 11 "and 11", lies for the advance of the strip material 1 during the rotation of the eccentric 24 from the position also indicated at 24 to the position 24 "on the strip material 1, represented by the position 11 'on the rocker 6 and in Fig. 4. During the rotation of the eccentric 24 via the position 24' to the position 24 ", the common articulation point 14 for the pressing member 18 moves from the position 14 ' to the position 14 ", so that there is a short-term simultaneous contact of the feed roller 3 and the pressing member 18 with the strip material 1. The articulation point 21 of the connecting rod 22 on the link element 9 moves from position 21 'to position 21" on one Circular arc part around the axis 11 in the position 11 '. After passing through the eccentric 24 through the position 24 ", the articulation point 21 first moves from the position 21" on a circular arc piece around the point 14 "into the position 21", since the pressure element 18 rests on the strip material 1. During this time, the axis 11 of the feed roller 3 moves from the point 11 'to the point 11 ". The feed roller 3 thus lifts the position 24" from the strip material 1 as it passes through the eccentric 24 (FIG. 5). The further rotation of the eccentric 24 to the position 24 "causes the handlebar element 9 to rest on the height-adjustable stop 28. Depending on the position of the eccentric 28, depending on the required degree of intermediate ventilation, the handlebar element 9 comes to rest sooner or later on the stop 28 (Fig. 6), so that the length of the Kriesbogenstück between positions 21 "and 21" depends on it. When the position 21 ″ is reached and the point 24 ″ of the eccentric 24 is passed through, the pressing member 18 lifts off the strip material 1. The articulation point 14 is moved from position 14 "to position 14" on a circular arc around the handlebar bearing 17. Point 21 moves from position 21 "to position 21". With a further rotation of the eccentric from the position 24 'to the position 24, the bearing point 21 is moved back on the previously traversed path to a central position between the positions 21' and 21 ". When the position 24 of the eccentric has been reached, the pressing member 18 comes first , then the feed roller 3 to rest on the strip material 1. With the start of the advance of the strip material 1, approximately in position 24 of the eccentric, the pressing member 18 must have been lifted off the strip material 1. In the event that intermediate ventilation is not required , the eccentric 28 is reset to such an extent that the lower edge 31 of the link element 9 does not come into contact with the eccentric 28. For this case the articulation point 21 of the connecting rod 22 moves on an elongated path of the circular arc around the articulation point 14 in the position 14 " from position 21 to position 21 ".
  • 4 shows the support of the feed roller 3 pressed against the feed roller 2 with the interposition of the strip material 1, that is to say for the feed of the strip material 1 during the eccentric circulation from the position 24 to the position 24 ".
  • Fig. 5 shows the period of retraction of the feed roller 2, in which the strip material 1 is to be held between the pressing member 18 and the counter member 19.
  • 6 shows the period of time when the strip material 1 is at a standstill, in which intermediate ventilation takes place.

Claims (5)

1. Apparatus for progressive forward feed of strip material (1) having two forward feed rollers (2, 3) driven in opposite directions, a first forward feed roller (2) being mounted in a stationary manner and a second forward feed roller (3) being movable by means of a lifting device (4) in each case at the time of reversal of the direction of rotation of at least one of the forward feed rollers (3) alternately against the other forward feed roller (2) or away from the latter into a return position, and the second forward feed roller (3) being mounted rotatably in a rocker (6), on one end (7) of which a steering element (9) of the lifting device (4) engages, and on its other end (8), situated opposite in relation to the axle (11) of the second forward feed roller (3), a spring power accumulator (12) engages in the direction of operation (13) of the contact pressure of the second forward feed roller (3) on the first forward feed roller (2), characterized in that a guide rod (15) engages on the rocker (6) between the second forward feed roller (3) and the point of engagement (26) of the steering element (9), which guide rod is mounted with its other end (16) in a stationary manner and rotatably approximately on a level with the centre of the second forward feed roller (3), in that a pressing member (18) is connected to the guide rod (15), which pressing member is pressed against a stationary counter-member (19) in the return position of the second forward feed roller (3), with the strip material (1) being inserted, to fix the strip material (1) during the return movement of the first forward feed roller (2), and in that a connecting rod (22) engages on the steering element (9) spaced away from its point of engagement (26) on the rocker (6), which connecting rod can be driven essentially parallel to the rocker (6) and extending in the direction of the latter in a stationary bearing (23) via an excenter (24).
2. Apparatus according to Claim 1, characterized in that the rocker (6) and the steering element (9) are interconnected rigidly at the point of engagement (26) of the steering element (9) on the rocker (6), in that the steering element (9) can be guided with the end part (27) directed towards the strip against a height-adjustable and stationary stop (28), and in that the excentricity of the excenter (24) for the connecting rod (22), the diameter of the second forward feed roller (3) and its central spacing from the strip material (1) as well as the spacing of the bottom edge (29) of the pressing member (18) from the strip material (1) and the spacing of the bottom edge (31) of the steering element (9) from the stop (28) are set in such a way that, on rotation of the excenter (24) of the connecting rod (22), the second forward feed roller (3) is lifted from the strip material (1) when the pressing member (18) is guided against the strip material (1) and the pressing member (18) is lifted from the strip material (1) when the steering element (9) is moved onto the stop (28).
3. Apparatus according to Claim 1, characterized in that the pressing member (18) is mounted, on the one hand, rotatably in the rocker (6) and, on the other hand, rotatably and guided longitudinally in a stationary bearing (32).
4. Apparatus according to Claim 1, characterized in that the frame (5) forms a parallelogram between the excenter (24) and the stationary bearing (17) of the guide rod (15) with the effective lengths of the connecting rod (22), of the guide rod (15) and of the steering element (9).
5. Apparatus according to Claim 4, characterized in that the spacings from the excenter (24) and the coupling point (21) of the connecting rod (22) on the steering element (9) and from the stationary bearing (17) of the guide rod (15) and the coupling point (14) of the guide rod (15) on the rocker (6) are of equal length, and in that an actuating means (33) is coupled to the steering element (9) which actuating means can be adjusted essentially in the direction and in the counter-direction (34) of/to the direction of operation of the spring power accumulator (12).
EP87109454A 1986-07-12 1987-07-01 Device for intermittent feed of strip with two opposed driven feeding rollers Expired - Lifetime EP0253205B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863623647 DE3623647A1 (en) 1986-07-12 1986-07-12 DEVICE FOR THE STEP-BY-STEP PROCESSING OF TAPE MATERIAL WITH TWO COUNTER-DRIVING DRIVE ROLLERS
DE3623647 1986-07-12

Publications (3)

Publication Number Publication Date
EP0253205A2 EP0253205A2 (en) 1988-01-20
EP0253205A3 EP0253205A3 (en) 1988-03-30
EP0253205B1 true EP0253205B1 (en) 1990-10-17

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ID=6305101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109454A Expired - Lifetime EP0253205B1 (en) 1986-07-12 1987-07-01 Device for intermittent feed of strip with two opposed driven feeding rollers

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US (1) US4792074A (en)
EP (1) EP0253205B1 (en)
DE (2) DE3623647A1 (en)
ES (1) ES2018504B3 (en)

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CH677328A5 (en) * 1988-10-26 1991-05-15 Bruderer Ag
CH679134A5 (en) * 1989-05-03 1991-12-31 Bruderer Ag
EP0606114A1 (en) * 1989-08-11 1994-07-13 Seiko Instruments Inc. Method of producing field effect transistor
IT223039Z2 (en) * 1990-04-24 1995-06-09 Panotec Srl STRUCTURE OF A LOCKING DEVICE, IN PARTICULAR DURING THE DRAGING OF THE CARDBOARD
DE4221687C2 (en) * 1992-07-02 1997-05-22 Raster Zeulenroda Werkzeugmasc Feed device for intermittent feed of strip or wire material
US5720421A (en) † 1994-02-28 1998-02-24 Vamco Machine & Tool, Inc. Elecronically controlled high speed press feed
KR980009576A (en) * 1995-09-29 1998-04-30 이케우찌 마사토 Weft dispensing device in fluid loom
US5992722A (en) * 1996-11-26 1999-11-30 The Minster Machine Company Zero force roll release for high speed press feed units
EP1002596B1 (en) 1998-11-20 2002-03-13 Bruderer Ag Apparatus for stepwise transport of a strip
US6843156B1 (en) * 2000-10-10 2005-01-18 Jere F. Irwin Apparatus for conveying, guiding, and locating a thermoformable web
ATE296694T1 (en) * 2002-07-08 2005-06-15 Bruderer Ag FEED DEVICE FOR INTERMITTENTLY FEEDING A STRIP-SHAPED BLANK TO A PRESS AND METHOD FOR OPERATING THE SAME
ES2296851T3 (en) * 2002-08-22 2008-05-01 Bruderer Ag ADVANCE DEVICE FOR DRIVING INTERMITTENTLY A GROSS PART IN THE FORM OF A TAPE TO A PRESS AND PROCEDURE FOR OPERATION.
ATE396806T1 (en) 2004-11-05 2008-06-15 Bruderer Ag DEVICE FOR FEEDING A STRAP-SHAPED SEMI-FINISHED MATERIAL TO A PRESS AND METHOD FOR ADJUSTING THE STRIP THICKNESS OF A FEED DEVICE
ES2331540T3 (en) * 2007-01-08 2010-01-07 Bruderer Ag DEVICE FOR INTERMITTENTLY FEEDING A PRESS WITH A SEMI-FINISHED PRODUCT IN THE FORM OF A BAND OR WIRE.
CN102120237B (en) * 2010-11-26 2012-11-07 武汉木兰环保设备有限公司 Automatic feeding punching machine

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Also Published As

Publication number Publication date
DE3765590D1 (en) 1990-11-22
US4792074A (en) 1988-12-20
EP0253205A3 (en) 1988-03-30
ES2018504B3 (en) 1991-04-16
DE3623647A1 (en) 1988-01-14
EP0253205A2 (en) 1988-01-20

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