EP0524614B1 - Untwisting device - Google Patents

Untwisting device Download PDF

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Publication number
EP0524614B1
EP0524614B1 EP92112498A EP92112498A EP0524614B1 EP 0524614 B1 EP0524614 B1 EP 0524614B1 EP 92112498 A EP92112498 A EP 92112498A EP 92112498 A EP92112498 A EP 92112498A EP 0524614 B1 EP0524614 B1 EP 0524614B1
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EP
European Patent Office
Prior art keywords
pivot
axis
clamping
frame
rollers
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EP92112498A
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German (de)
French (fr)
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EP0524614A1 (en
Inventor
Lutz Seidel
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Erhardt and Leimer GmbH
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Erhardt and Leimer GmbH
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Publication of EP0524614A1 publication Critical patent/EP0524614A1/en
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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06BTREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B23/00Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
    • D06B23/08Untwisting devices

Definitions

  • the invention relates to a strand winder of the type specified in the preamble of claim 1.
  • each roller of the pair of rollers moves against the springs depending on the force of the strand acting on it, so that the nip of the rollers moves back and forth uncontrollably transversely to the strand passage direction and the strand thereby crosswise when unscrewed, which results in a treatment that is too rough for sensitive goods and an unsatisfactory turning result.
  • one roller of the pair of rollers remains on the bars, while only the other gives way.
  • the strand can begin to bend and be damaged when the nip moves on one side with respect to the longitudinal axis of the rotary cage and is damaged.
  • the throughput speed of the strand is undesirably limited.
  • the invention has for its object to provide a short strand twister of the type mentioned, which can effectively turn the strand and treats the strand gently when opening.
  • the clamping gap When unscrewing, the clamping gap always remains centered on the strand passage axis, which has a predetermined position in the rotating cage with a view to optimal and yet gentle unscrewing.
  • the strand In the constantly centered clamping gap, the strand is gripped when it is turned on so that it does not excite to strike, even in the lead and trailing, but remains guided in the center.
  • a single pair of rollers is sufficient for a satisfactory unscrewing action, as a result of which the strand former has a short axial length, which benefits the overall dimensions of the unscrewing device.
  • each pinch roller is not only pushed away as a function of the force of the strand acting on it, but exactly synchronously and in the opposite direction to the other roller.
  • the two pinch rollers not only hold the strand exactly in the middle, but also exert equally large forces on the strand, by means of which the latter is effectively opened. Even if the strand should have a one-sided thickening, it remains guided in the middle when the thickening passes through the nip. It is also very advantageous to align the strand pass axis with the longitudinal axis of the rotary cage to collapse. The forces exerted when opening are very effectively transferred into the strand, which is nevertheless treated with care. Thanks to the central guidance with respect to the longitudinal axis of the rotating cage, pendulum or beating tendencies of the running strand are suppressed from the outset.
  • crank rod a kind of crank mechanism is created for the synchronous and opposite working movement of both pinch rollers.
  • the dimensions in the embodiment according to claim 4 contribute to the desirably short overall length, to an always intimate contact between the pinch rollers and the strand and to favorable force relationships.
  • a stable support of the pinch rollers is given in the embodiment according to claim 6. Even relatively thick and heavy strands can be opened easily. It is quite beneficial to provide the pinch rollers with a grooved surface. Here, the textile fabric of the strand is effective and still gently gripped. The unscrewing movements are transmitted with minimal slip.
  • a structurally simple embodiment which is characterized, inter alia, by a short overall length and a capsule construction, emerges from claim 7.
  • the embodiment allows for easy assembly due to the always vertically oriented frame construction.
  • the strand winder is either screwed directly to the ceiling of the building on its upper fastening surface or it is placed on an assembly platform.
  • an attachment option on the side parts of the frame is conceivable.
  • the jacket prevents liquid from splashing out of the mostly wet strand.
  • the embodiment according to claim 8 is particularly expedient because the liquid which emerges when the strand is gripped by the pinch rollers is collected in the jacket and passed into the collecting trough.
  • the flow guide shields the relatively movable components of the rotary cage against the liquid and guides them into the collecting trough.
  • the strand winder is mounted in a support body containing a deflection roller and can be adjusted to the respective operating conditions by pivoting about the pendulum axis.
  • a self-adjusting or arbitrarily adjustable bracket of the strand winder is created on the support body.
  • the strand winder is easily adjustable, it is held stable in the supporting body.
  • a strand opening device V has a box-shaped support body T, in which a strand former S, a deflection roller U lying behind it in the direction of passage D and a sensing device F are arranged.
  • the sensing device F can be used to generate signals which control the strand winder S in order to open a running, possibly twisted strand of goods.
  • the strand winder S is integrated in a frame 1, on which a drive motor 2 is fastened and connected to an annular base body 4 via a drive connection 3.
  • the base body 4 is rotatably mounted on the frame 1 by means of bearings 5 and has a longitudinal axis 17, which coincides with a strand axis A in the embodiment shown.
  • Mounted on the base body 4 is a holder 7 for a pair of rollers P, the two clamping rollers 8, 9 of which limit a roller gap Z of variable width.
  • the base body 4 defines with the holder 7 and the pair of rollers P a rotating cage K.
  • the parallel clamping rollers 8, 9 are freely supported on swivel arms 10, 11.
  • the pivot arms 10, 11 are arranged in pivot bearings 12 of the holder 7 so as to be pivotable about axes parallel to the roller axes. At least one of the swivel arms 10, 11 is acted upon by a spring (not shown) in the direction of arrow 13.
  • the swivel arms 10, 11 are forcibly coupled by a common crank rod 14, which is articulated directly on the swivel arm 11 at a straight extension 11a in a pivot point 15 and on the swivel arm 10 in a pivot point 16 between the pivot bearing 12 and the pinch roller 9.
  • the distances between the articulation points 15, 16 and the pivot bearings 12 are the same size and are approximately a quarter of the length of the swivel arms 11 between the swivel bearings 12 and the axes of the pinch rollers 8, 9.
  • the swivel bearings 12 are equidistant from the strand pass axis A and converge from the swivel bearings 12 when the pinch rollers 8, 9 are adjacent.
  • a peripheral collecting trough 18a is attached to the frame 1, on which a pot-shaped casing 18, preferably made of plastic, is mounted, which has a through opening 19 for the strand (not shown) in its pot bottom and covers the pair of rollers P from the outside.
  • a pot-shaped casing 18 preferably made of plastic
  • an inlet pipe 6 protrudes into the rotating cage.
  • a collar-like flow guiding part 20 is connected to the base body 4 and projects with a bent edge into the collecting channel 18a.
  • At least one drain opening 21 is provided in the collecting trough 18a, to which a hose or a pipe can optionally be connected.
  • the frame 1 is pivotally connected to the support body T by at least one pendulum support 23.
  • the pendulum support 23 is articulated on the support body T on a pendulum axis 22 and has a pivot point 24 on the frame 1 at the other end.
  • the pivot point 24 is optionally adjustable in the longitudinal direction of the frame.
  • the frame 1 is movably connected to the support body T via a pin slot guide 25 on the side of the articulation point 24 opposite the longitudinal axis 17.
  • pins 26 of the frame 1 engage in guide slots 27 of the support body T.
  • a sensing element E to which a counter-roller G is assigned, is arranged in the sensing device F.
  • the counter roller G can be pivoted on pivot arms 28 about an axis 29 of the supporting body T and is acted upon by a spring 30 in the direction of the sensing element E.
  • the probe element E can be adjusted transversely to the longitudinal direction of the support body T according to FIG.
  • the sensing element E is a scanning device H assigned, which is mounted in the support body T and contains at least one analog initiator J.
  • the feeler element E is a roller 31 which is freely rotatable parallel to the axis of the deflection roller U and has grooves 32 on its jacket which run in the circumferential direction.
  • the roller 31 is rotatably and displaceably mounted with rotary and sliding bearings 33 on an axis 34 mounted in bearings 35 in the support body T.
  • a position sensor 36 At one end of the roller 31 there is a position sensor 36, which in the exemplary embodiment shown is a sleeve 37 with an outer conical surface 38.
  • the conical lateral surface 38 has a generator 41 which is oblique with respect to the axis 34 and which serves as a reference contour for the analog initiator and is scanned by the latter for its respective distance in order to generate signals proportional to the position of the roller 31 on the guide 34.
  • the counter roller G is designed as a roller 39 with grooves 40 running in the circumferential direction and is also mounted so as to be transversely displaceable.
  • a position transmitter can also be arranged on the roller 39, which is then scanned by a further analog initiator J1 indicated by dashed lines.
  • the twisted strand runs through the device in the strand passage direction D. First, it passes through the rotary cage K, before it is subsequently deflected at the deflection roller U and then passed through the sensing device F.
  • the sensing device F senses the direction and the extent of the rotation and generates signals with which the drive motor 2 rotates the rotary cage K.
  • the strand is clamped in the nip Z between the pinch rollers 8, 9, the width of the nip Z dependent on the current strand thickness always being centered on the strand axis A because the two pinch rollers 8, 9 are synchronized by the crank rod 14 opposing spreading movement are forced and always keep the same distances from the strand axis A.
  • the feeler element E lies against the surface of the strand, the strand being pressed against the grooves 32 by the counter-roller G.
  • the twist of the strand produces thread-like depressions in the surface thereof, the pitch of which causes the roller 31 to be displaced on one or the other side on the axis 34 depending on the extent of the twist and the direction of the twist during the continuous movement of the strand.
  • the analog initiator J scans the respective position or the position changes of the roller 31 and generates signals proportional to the rotation for the drive motor 2.
  • the frame 1 Since the strand does not always enter the rotary cage K from exactly below, the frame 1 is adjusted about the pendulum axis 22. If necessary, a certain inclination of the frame 1 is predetermined from the outset in order to create favorable run-in conditions for the strand.
  • the strand winder S is very effective thanks to the clamping of the clamping rollers 8, 9 and the always central nip Z and manages with an extremely short overall length and a short lead or lag of the strand.
  • the short length of the strand untwinder S and the short lead or trailing length result in a very low strand untwisting device V, which can be easily accommodated even with normal room heights and nevertheless ensures a sensitive untwisting effect of the strand even with a short lead length.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Ropes Or Cables (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Description

Die Erfindung betrifft einen Strangaufdreher der im Oberbegriff des Anspruchs 1 angegebenen Art.The invention relates to a strand winder of the type specified in the preamble of claim 1.

Bei einem aus der US-PS 22 48 962 bekannten Strangaufdreher sind in Strangdurchlaufrichtung zwei Walzenpaare mit Zwischenabständen hintereinander angeordnet. Beide Walzen jedes Walzenpaares sind beidendig mit Schiebehülsen auf zur Strangdurchlaufrichtung senkrechten Holmen im Drehkäfig geführt. Die Schiebehülsen werden von Druckfedern beaufschlagt, die beide Walzen des Walzenpaares zueinander drücken. Der Drehkäfig baut in Strangdurchlaufrichtung lang und benötigt eine beträchtliche Vorlauf- bzw. Nachlaufstrecke für den Strang. Der Strangaufdreher läßt sich praktisch nur in einer Halle mit großer Raumhöhe unterbringen. Ungünstig ist, daß die beiden Walzen jedes Walzenpaares sich auf den Holmen relativ schwergängig bewegen und deshalb nicht in der Lage sind, sich der beim Durchlauf permanent ändernden Strangdicke feinfühlig anzupassen und den Strang für das Aufdrehen optimal zu greifen. Besonders nachteilig ist, daß sich jede Walze des Walzenpaares abhängig von der an ihr wirksamen Kraft des Stranges gegen die Federn bewegt, so daß der Klemmspalt der Walzen unkontrolliert quer zur Strangdurchlaufrichtung hin- und herwandert und der Strang dadurch beim Aufdrehen querversetzt wird, was eine für empfindliche Waren zu grobe Behandlung und ein unbefriedigendes Aufdrehergebnis erbringt. Im Extremfall bleibt die eine Walze des Walzenpaares auf den Holmen stehen, während nur die andere nachgibt. Der Strang kann bei sich bezüglich der Längsachse des Drehkäfigs einseitig verlagerndem Walzenspalt bei Aufdrehen zu schlagen beginnen und beschädigt werden. Die Durchlaufgeschwindigkeit des Stranges ist unerwünscht begrenzt.In one of the strand winders known from US Pat. No. 2,248,962, two pairs of rollers are arranged one behind the other in the strand passage direction. Both rollers of each pair of rollers are guided at both ends in the rotating cage with sliding sleeves on spars that are perpendicular to the direction of the strand. The sliding sleeves are acted upon by compression springs, which press both rollers of the pair of rollers against each other. The rotary cage is long in the direction of strand passage and requires a considerable lead or trailing distance for the strand. The strand winder can practically only be accommodated in a hall with a high room height. It is unfavorable that the two rollers of each pair of rollers move relatively stiffly on the spars and are therefore not able to adjust sensitively to the strand thickness that is constantly changing during passage and to optimally grip the strand for opening. It is particularly disadvantageous that each roller of the pair of rollers moves against the springs depending on the force of the strand acting on it, so that the nip of the rollers moves back and forth uncontrollably transversely to the strand passage direction and the strand thereby crosswise when unscrewed, which results in a treatment that is too rough for sensitive goods and an unsatisfactory turning result. In extreme cases, one roller of the pair of rollers remains on the bars, while only the other gives way. The strand can begin to bend and be damaged when the nip moves on one side with respect to the longitudinal axis of the rotary cage and is damaged. The throughput speed of the strand is undesirably limited.

Der Erfindung liegt die Aufgabe zugrunde, einen kurz bauenden Strangaufdreher der eingangs genannten Art zu schaffen, der den Strang wirksam aufzudrehen vermag und den Strang beim Aufdrehen schonend behandelt.The invention has for its object to provide a short strand twister of the type mentioned, which can effectively turn the strand and treats the strand gently when opening.

Die gestellte Aufgabe wird erfindungsgemäß mit den im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmalen gelöst.The object is achieved according to the invention with the features specified in the characterizing part of patent claim 1.

Beim Aufdrehen bleibt der Klemmspalt stets auf die Strangdurchlaufachse zentriert, die im Drehkäfig eine im Hinblick auf ein optimales und trotzdem schonendes Aufdrehen vorbestimmte Position hat. In dem ständig zentrierten Klemmspalt wird der Strang beim Aufdrehen so ergriffen, daß er auch im Vor- und Nachlauf nicht zum Schlagen angeregt, sondern sauber mittig geführt bleibt. Es reicht ein einziges Walzenpaar für eine befriedigende Aufdrehwirkung aus, wodurch der Strangaufdreher eine kurze axiale Baulänge erhält, die den Gesamtabmessungen der Aufdrehvorrichtung zugute kommt. Außerdem ist sichergestellt, daß jede Klemmwalze nicht nur abhängig von der an ihr wirksamen Kraft des Stranges weggedrückt wird, sondern genau synchron und gegensinnig zur anderen Walze. Die beiden Klemmwalzen halten den Strang dadurch nicht nur genau mittig, sondern üben gleich große Kräfte auf den Strang aus, durch die dieser wirksam aufgedreht wird. Selbst wenn der Strang eine einseitige Verdickung haben sollte, bleibt er bei Durchlauf der Verdickung durch den Walzenspalt mittig geführt. Es ist außerdem sehr vorteilhaft, die Strangdurchlaufachse mit der Längsachse des Drehkäfigs zusammenfallen zu lassen. Die beim Aufdrehen ausgeübten Kräfte werden dabei sehr wirksam in den Strang übertragen, der trotzdem schonend behandelt wird. Dank der mittigen Führung bezüglich der Längsachse des Drehkäfigs werden Pendel- oder Schlagneigungen des laufenden Stranges von vornherein unterdrückt.When unscrewing, the clamping gap always remains centered on the strand passage axis, which has a predetermined position in the rotating cage with a view to optimal and yet gentle unscrewing. In the constantly centered clamping gap, the strand is gripped when it is turned on so that it does not excite to strike, even in the lead and trailing, but remains guided in the center. A single pair of rollers is sufficient for a satisfactory unscrewing action, as a result of which the strand former has a short axial length, which benefits the overall dimensions of the unscrewing device. In addition, it is ensured that each pinch roller is not only pushed away as a function of the force of the strand acting on it, but exactly synchronously and in the opposite direction to the other roller. As a result, the two pinch rollers not only hold the strand exactly in the middle, but also exert equally large forces on the strand, by means of which the latter is effectively opened. Even if the strand should have a one-sided thickening, it remains guided in the middle when the thickening passes through the nip. It is also very advantageous to align the strand pass axis with the longitudinal axis of the rotary cage to collapse. The forces exerted when opening are very effectively transferred into the strand, which is nevertheless treated with care. Thanks to the central guidance with respect to the longitudinal axis of the rotating cage, pendulum or beating tendencies of the running strand are suppressed from the outset.

Eine baulich einfache, funktionssichere und robuste Ausführungsform geht aus Anspruch 2 hervor. Mittels der Kurbelstange wird eine Art Kurbeltrieb für die synchrone und gegensinnige Arbeitsbewegung beider Klemmwalzen geschaffen.A structurally simple, reliable and robust embodiment can be seen from claim 2. Using the crank rod, a kind of crank mechanism is created for the synchronous and opposite working movement of both pinch rollers.

Günstige Kräfteverhältnisse und ein feinfühliges Ansprechen der Klemmwalzen sind bei der Ausführungsform gemäß Anspruch 3 gegeben.Favorable balance of power and a sensitive response of the pinch rollers are given in the embodiment according to claim 3.

Zur wünschenswert kurzen Baulänge, zu einem stets innigen Kontakt zwischen den Klemmwalzen und dem Strang und zu günstigen Kräfteverhältnissen tragen die Maßverhältnisse bei der Ausführungsform gemäß Anspruch 4 bei.The dimensions in the embodiment according to claim 4 contribute to the desirably short overall length, to an always intimate contact between the pinch rollers and the strand and to favorable force relationships.

Ein rasches Ansprechen mit permanent gutem Griff der Klemmwalzen ist bei der Ausführungsform gemäß Anspruch 5 gegeben. Es ist allerdings auch denkbar, die Schwenklager hinter die Klemmwalzen zu positionieren.A quick response with permanently good grip of the pinch rollers is given in the embodiment according to claim 5. However, it is also conceivable to position the pivot bearings behind the pinch rollers.

Eine stabile Abstützung der Klemmwalzen ist bei der Ausführungsform gemäß Anspruch 6 gegeben. Es lassen sich so auch relativ dicke und schwere Stränge problemlos aufdrehen. Recht förderlich ist es, die Klemmwalzen mit einer gerillten Oberfläche zu versehen. Hierbei wird das Textilgewebe des Stranges wirksam und trotzdem schonend erfaßt. Die Aufdrehbewegungen werden mit minimalem Schlupf übertragen.A stable support of the pinch rollers is given in the embodiment according to claim 6. Even relatively thick and heavy strands can be opened easily. It is quite beneficial to provide the pinch rollers with a grooved surface. Here, the textile fabric of the strand is effective and still gently gripped. The unscrewing movements are transmitted with minimal slip.

Eine baulich einfache Ausführungsform, die sich unter anderen durch eine kurze Baulänge und eine Kapselbauweise auszeichnet, geht aus Anspruch 7 hervor. Außerdem erlaubt die Ausführungsform durch die stets senkrecht ausgerichtete Rahmenbauweise eine einfache Montage. Der Strangaufdreher wird entweder direkt an seiner oberen Befestigungsfläche an die Gebäudedecke geschraubt oder er wird auf eine Montagebühne gestellt. Ferner ist eine Befestigungsmöglichkeit an den Seitenteilen des Rahmens denkbar. Der Mantel verhindert das Abspritzen von Flüssigkeit aus dem zumeist nassen Strang.A structurally simple embodiment, which is characterized, inter alia, by a short overall length and a capsule construction, emerges from claim 7. In addition, the embodiment allows for easy assembly due to the always vertically oriented frame construction. The strand winder is either screwed directly to the ceiling of the building on its upper fastening surface or it is placed on an assembly platform. Furthermore, an attachment option on the side parts of the frame is conceivable. The jacket prevents liquid from splashing out of the mostly wet strand.

Besonders zweckmäßig ist ferner die Ausführungsform gemäß Anspruch 8, weil in dem Mantel die beim Greifen des Strangs durch die Klemmwalzen austretende Flüssigkeit gesammelt und in die Sammelrinne geleitet wird. Der Strömungsleitteil schirmt die relativ beweglichen Komponenten des Drehkäfigs gegen die Flüssigkeit ab und führt sie in die Sammelrinne.Furthermore, the embodiment according to claim 8 is particularly expedient because the liquid which emerges when the strand is gripped by the pinch rollers is collected in the jacket and passed into the collecting trough. The flow guide shields the relatively movable components of the rotary cage against the liquid and guides them into the collecting trough.

Zweckmäßigerweise werden Flüssigkeitsansammlungen fortwährend entfernt, wie in Anspruch 9 angegeben ist, um eine Verschmutzung der beweglichen Komponenten des Strangaufdrehers und der Umgebung zu vermeiden.Expediently, fluid accumulations are continuously removed, as stated in claim 9, in order to avoid contamination of the movable components of the strand winder and the environment.

Bei der Ausführungsform gemäß Anspruch 10 ist der Strangaufdreher in einem eine Umlenkrolle enthaltenden Tragkörper gelagert und durch Verschwenken um die Pendelachse auf die jeweiligen Betriebsbedingungen einstellbar.In the embodiment according to claim 10, the strand winder is mounted in a support body containing a deflection roller and can be adjusted to the respective operating conditions by pivoting about the pendulum axis.

Bei der Ausführungsform gemäß Anspruch 11 wird eine selbsteinstellende oder willkürlich einstellbare Halterung des Strangaufdrehers am Tragkörper geschaffen. Obwohl der Strangaufdreher leichtgängig verstellbar ist, ist er im Tragkörper stabil gehalten.In the embodiment according to claim 11, a self-adjusting or arbitrarily adjustable bracket of the strand winder is created on the support body. Although the strand winder is easily adjustable, it is held stable in the supporting body.

Zur kompakten Bauweise des Strangaufdrehers tragen schließlich die Merkmale von Anspruch 12 bei.Finally, the features of claim 12 contribute to the compact construction of the strand winder.

Anhand der Zeichnung wird eine Ausführungsform des Erfindungsgegenstandes erläutert.An embodiment of the subject matter of the invention is shown in the drawing explained.

Es zeigen:

Figur 1
einen Längsteilschnitt einer Strangaufdrehvorrichtung und
Figur 2
eine Rückteilansicht der Strangaufdrehvorrichtung.
Show it:
Figure 1
a partial longitudinal section of a strand twisting device and
Figure 2
a rear view of the strand twisting device.

Eine Strangaufdrehvorrichtung V weist einen kastenförmigen Tragkörper T auf, in dem ein Strangaufdreher S, eine in Strangdurchlaufrichtung D dahinterliegende Umlenkrolle U und eine Fühlvorrichtung F angeordnet sind. Mit der Fühlvorrichtung F sind Signale erzeugbar, die den Strangaufdreher S ansteuern, um einen laufenden, ggfs. in sich verdrehten Waren-Strang aufzudrehen.A strand opening device V has a box-shaped support body T, in which a strand former S, a deflection roller U lying behind it in the direction of passage D and a sensing device F are arranged. The sensing device F can be used to generate signals which control the strand winder S in order to open a running, possibly twisted strand of goods.

Der Strangaufdreher S ist in einen Rahmen 1 integriert, auf dem ein Antriebsmotor 2 befestigt und über eine Antriebsverbindung 3 mit einem ringförmigen Grundkörper 4 verbunden ist. Der Grundkörper 4 ist mittels Lager 5 am Rahmen 1 drehbar gelagert und weist eine Längsachse 17 auf, die bei der gezeigten Ausführungsform mit einer Strangdurchlaufachse A zusammenfällt. Am Grundkörper 4 ist eine Halterung 7 für ein Walzenpaar P montiert, dessen beide Klemmwalzen 8, 9 einen Walzenspalt Z variabler Weite begrenzen. Der Grundkörper 4 definiert mit der Halterung 7 und dem Walzenpaar P einen Drehkäfig K. Die zueinander parallelen Klemmwalzen 8, 9 sind auf Schwenkarmen 10, 11 freilaufend gelagert. Die Schwenkarme 10, 11 sind in Schwenklagern 12 der Halterung 7 um zu den Walzenachsen parallele Achsen schwenkbar angeordnet. Zumindest einer der Schwenkarme 10, 11 ist durch eine nicht dargestellte Feder in Pfeilrichtung 13 beaufschlagt. Die Schwenkarme 10, 11 sind durch eine gemeinsame Kurbelstange 14 zwangsgekoppelt, die am Schwenkarm 11 an einer geraden Verlängerung 11a in einer Anlenkstelle 15 und am Schwenkarm 10 in einer Anlenkstelle 16 zwischen dem Schwenklager 12 und der Klemmwalze 9 jeweils direkt angelenkt ist. Die Abstände zwischen den Anlenkstellen 15, 16 und den Schwenklagern 12 sind gleich groß und betragen annähernd ein Viertel der Länge der Schwenkarme 11 zwischen den Schwenklagern 12 und den Achsen der Klemmwalzen 8, 9. Die Schwenklager 12 sind gleich weit von der Strangdurchlaufachse A beabstandet und konvergieren bei aneinanderliegenden Klemmwalzen 8, 9 von den Schwenklagern 12 aus.The strand winder S is integrated in a frame 1, on which a drive motor 2 is fastened and connected to an annular base body 4 via a drive connection 3. The base body 4 is rotatably mounted on the frame 1 by means of bearings 5 and has a longitudinal axis 17, which coincides with a strand axis A in the embodiment shown. Mounted on the base body 4 is a holder 7 for a pair of rollers P, the two clamping rollers 8, 9 of which limit a roller gap Z of variable width. The base body 4 defines with the holder 7 and the pair of rollers P a rotating cage K. The parallel clamping rollers 8, 9 are freely supported on swivel arms 10, 11. The pivot arms 10, 11 are arranged in pivot bearings 12 of the holder 7 so as to be pivotable about axes parallel to the roller axes. At least one of the swivel arms 10, 11 is acted upon by a spring (not shown) in the direction of arrow 13. The swivel arms 10, 11 are forcibly coupled by a common crank rod 14, which is articulated directly on the swivel arm 11 at a straight extension 11a in a pivot point 15 and on the swivel arm 10 in a pivot point 16 between the pivot bearing 12 and the pinch roller 9. The distances between the articulation points 15, 16 and the pivot bearings 12 are the same size and are approximately a quarter of the length of the swivel arms 11 between the swivel bearings 12 and the axes of the pinch rollers 8, 9. The swivel bearings 12 are equidistant from the strand pass axis A and converge from the swivel bearings 12 when the pinch rollers 8, 9 are adjacent.

Am Rahmen 1 ist eine umlaufende Sammelrinne 18a befestigt, an der ein topfförmiger Mantel 18, vorzugsweise aus Kunststoff, montiert ist, der in seinem Topfboden eine Durchlauföffnung 19 für den nicht gezeigten Strang besitzt und das Walzenpaar P von außen her abdeckt. An der Unterseite des Rahmens 1 ragt ein Einlaufrohr 6 in den Drehkäfig. Mit dem Grundkörper 4 ist ein kragenartiger Strömungsleitteil 20 verbunden, der mit einem umgebogenen Rand bis in die Sammelrinne 18a ragt. In der Sammelrinne 18a ist wenigstens eine Ablauföffnung 21 vorgesehen, an die gegebenenfalls ein Schlauch oder eine Rohrleitung anschließbar ist.A peripheral collecting trough 18a is attached to the frame 1, on which a pot-shaped casing 18, preferably made of plastic, is mounted, which has a through opening 19 for the strand (not shown) in its pot bottom and covers the pair of rollers P from the outside. On the underside of the frame 1, an inlet pipe 6 protrudes into the rotating cage. A collar-like flow guiding part 20 is connected to the base body 4 and projects with a bent edge into the collecting channel 18a. At least one drain opening 21 is provided in the collecting trough 18a, to which a hose or a pipe can optionally be connected.

Der Rahmen 1 ist mit wenigstens einer Pendelstütze 23 schwenkbar mit dem Tragkörper T verbunden. Die Pendelstütze 23 ist am Tragkörper T an einer Pendelachse 22 angelenkt und hat am anderen Ende eine Anlenkstelle 24 am Rahmen 1. Die Anlenkstelle 24 ist gegebenenfalls in Rahmenlängsrichtung verstellbar. Ferner ist der Rahmen 1 über eine Stift-Schlitzführung 25 an der der Längsachse 17 gegenüberliegenden Seite der Anlenkstelle 24 mit dem Tragkörper T beweglich verbunden. Beispielsweise greifen Stifte 26 des Rahmens 1 in Führungsschlitze 27 des Tragkörpers T ein.The frame 1 is pivotally connected to the support body T by at least one pendulum support 23. The pendulum support 23 is articulated on the support body T on a pendulum axis 22 and has a pivot point 24 on the frame 1 at the other end. The pivot point 24 is optionally adjustable in the longitudinal direction of the frame. Furthermore, the frame 1 is movably connected to the support body T via a pin slot guide 25 on the side of the articulation point 24 opposite the longitudinal axis 17. For example, pins 26 of the frame 1 engage in guide slots 27 of the support body T.

In der Fühlvorrichtung F ist ein Tastelement E angeordnet, dem eine Gegenwalze G zugeordnet ist. Die Gegenwalze G ist an Schwenkarmen 28 um eine Achse 29 des Tragkörpers T schwenkbar und durch eine Feder 30 in Richtung auf das Tastelement E beaufschlagt. Das Tastelement E läßt sich gemäß Figur 1 quer zur Längsrichtung des Tragkörpers T verstellen.A sensing element E, to which a counter-roller G is assigned, is arranged in the sensing device F. The counter roller G can be pivoted on pivot arms 28 about an axis 29 of the supporting body T and is acted upon by a spring 30 in the direction of the sensing element E. The probe element E can be adjusted transversely to the longitudinal direction of the support body T according to FIG.

In der Fühlvorrichtung F ist dem Tastelement E eine Abtastvorrichtung H zugeordnet, die im Tragkörper T montiert ist und mindestens einen Analog-Initiator J enthält.In the sensing device F, the sensing element E is a scanning device H assigned, which is mounted in the support body T and contains at least one analog initiator J.

Das Tastelement E ist eine parallel zur Achse der Umlenkrolle U frei drehbar angeordnete Walze 31 mit in Umfangsrichtung verlaufenden Rillen 32 an ihrem Mantel. Die Walze 31 ist mit Dreh- und Schiebelagern 33 auf einer in Lagern 35 im Tragkörper T gelagerten Achse 34 drehbar und verschiebbar gelagert. An einem Ende der Walze 31 ist ein Positionsgeber 36 vorgesehen, der beim gezeigten Ausführungsbeispiel eine Hülse 37 mit einer außenliegenden Kegelmantelfläche 38 ist. Die Kegelmantelfläche 38 hat eine bezüglich der Achse 34 schräge Erzeugende 41, die als Referenzkontur für den Analog-Initiator dient und von diesem auf ihren jeweiligen Abstand abgetastet wird, um zur Position der Walze 31 auf der Führung 34 proportionale Signale zu erzeugen.The feeler element E is a roller 31 which is freely rotatable parallel to the axis of the deflection roller U and has grooves 32 on its jacket which run in the circumferential direction. The roller 31 is rotatably and displaceably mounted with rotary and sliding bearings 33 on an axis 34 mounted in bearings 35 in the support body T. At one end of the roller 31 there is a position sensor 36, which in the exemplary embodiment shown is a sleeve 37 with an outer conical surface 38. The conical lateral surface 38 has a generator 41 which is oblique with respect to the axis 34 and which serves as a reference contour for the analog initiator and is scanned by the latter for its respective distance in order to generate signals proportional to the position of the roller 31 on the guide 34.

Die Gegenwalze G ist als Walze 39 mit in Umfangsrichtung verlaufenden Rillen 40 ausgebildet und ebenfalls quer verschiebbar gelagert. Auch an der Walze 39 kann ein Positionsgeber angeordnet sein, der dann von einem weiteren strichliert angedeuteten Analog-Initiator J1 abgetastet wird.The counter roller G is designed as a roller 39 with grooves 40 running in the circumferential direction and is also mounted so as to be transversely displaceable. A position transmitter can also be arranged on the roller 39, which is then scanned by a further analog initiator J1 indicated by dashed lines.

Im Betrieb läuft der verdrehte Strang in Strangdurchlaufrichtung D durch die Vorrichtung. Zunächst durchsetzt er den Drehkäfig K, ehe er nachfolgend an der Umlenkrolle U umgelenkt und dann durch die Fühlvorrichtung F geführt wird. Die Fühlvorrichtung F tastet die Richtung und das Ausmaß der Verdrehung ab und erzeugt Signale, mit denen der Antriebsmotor 2 den Drehkäfig K verdreht. Im Drehkäfig K wird der Strang im Walzenspalt Z zwischen den Klemmwalzen 8, 9 eingeklemmt, wobei die von der momentanen Strangdicke abhängige Weite des Walzenspaltes Z stets auf die Strangdurchlaufachse A zentriert bleibt, weil die beiden Klemmwalzen 8, 9 durch die Kurbelstange 14 zu einer synchronen gegensinnigen Spreizbewegung gezwungen werden und stets gleiche Abstände von der Strangdurchlaufachse A einhalten. Durch die Klemmung im Walzenspalt Z wird der Strang gezwungen, der Drehung des Drehkäfigs K zu folgen, wodurch die Verdrehung beseitigt wird. Das Tastelement E liegt an der Strangoberfläche an, wobei der Strang durch die Gegenwalze G mit Nachdruck an die Rillen 32 angepreßt wird. Die Verdrehung des Stranges erzeugt in dessen Oberfläche gewindegangartige Vertiefungen, durch deren Steigung bei der Durchlaufbewegung des Stranges die Walze 31 in Abhängigkeit vom Ausmaß der Verdrehung und der Richtung der Verdrehung zur einen oder zur anderen Seite auf der Achse 34 verschoben wird. Der Analog-Initiator J tastet die jeweilige Position oder die Positionsänderungen der Walze 31 ab und erzeugt der Verdrehung proportionale Signale für den Antriebsmotor 2.In operation, the twisted strand runs through the device in the strand passage direction D. First, it passes through the rotary cage K, before it is subsequently deflected at the deflection roller U and then passed through the sensing device F. The sensing device F senses the direction and the extent of the rotation and generates signals with which the drive motor 2 rotates the rotary cage K. In the rotary cage K, the strand is clamped in the nip Z between the pinch rollers 8, 9, the width of the nip Z dependent on the current strand thickness always being centered on the strand axis A because the two pinch rollers 8, 9 are synchronized by the crank rod 14 opposing spreading movement are forced and always keep the same distances from the strand axis A. By clamping in Roll gap Z is forced to follow the rotation of the rotating cage K, whereby the twist is eliminated. The feeler element E lies against the surface of the strand, the strand being pressed against the grooves 32 by the counter-roller G. The twist of the strand produces thread-like depressions in the surface thereof, the pitch of which causes the roller 31 to be displaced on one or the other side on the axis 34 depending on the extent of the twist and the direction of the twist during the continuous movement of the strand. The analog initiator J scans the respective position or the position changes of the roller 31 and generates signals proportional to the rotation for the drive motor 2.

Da der Strang nicht stets genau von unten in den Drehkäfig K einläuft, wird der Rahmen 1 um die Pendelachse 22 verstellt. Gegebenenfalls wird eine bestimmte Schrägstellung des Rahmens 1 von vornherein vorgegeben, um günstige Einlaufverhältnisse für den Strang zu schaffen. Der Strangaufdreher S ist dank der Klemmung der Klemmwalzen 8, 9 und des stets zentrischen Walzenspaltes Z sehr wirksam und kommt mit einer außerordentlich kurzen Baulänge und einer kurzen Vorlauf- bzw. Nachlaufstrecke des Stranges aus. Aus der kurzen Länge des Strangaufdrehers S und der kurzen Vorlauf- bzw. Nachlauflänge resultiert insgesamt eine sehr niedrige Strangaufdrehvorrichtung V, die auch bei normalen Raumhöhen problemlos untergebracht werden kann und trotzdem für eine feinfühlige Aufdrehwirkung des Stranges auch bei nur kurzer Vorlauflänge sorgt.Since the strand does not always enter the rotary cage K from exactly below, the frame 1 is adjusted about the pendulum axis 22. If necessary, a certain inclination of the frame 1 is predetermined from the outset in order to create favorable run-in conditions for the strand. The strand winder S is very effective thanks to the clamping of the clamping rollers 8, 9 and the always central nip Z and manages with an extremely short overall length and a short lead or lag of the strand. The short length of the strand untwinder S and the short lead or trailing length result in a very low strand untwisting device V, which can be easily accommodated even with normal room heights and nevertheless ensures a sensitive untwisting effect of the strand even with a short lead length.

Claims (12)

  1. Appparatus (S) for taking the twist out of a rope with a body (K) of rotation which is rotatably driven around a longitudinal axis (17), said body (K) of rotation supporting at least a pair (P) of parallel free wheeling clamping rollers (8, 9), which are spreaded by the moving rope against the force of a spring, said clamping rollers (8, 9) defining a clamping slot (Z) with variable width for the moving rope, characterized in that both clamping rollers (8, 9) of at least one pair (P) of clamping rollers (8, 9) are coupled together only allowing a synchronous opposing movement transversal to the axis (A) of the moving rope, keeping centered the clamping slot (Z) relativ to a preterminated axis (A) of the moving rope in the body (K) of rotation independant from the width of the clamping slot (Z).
  2. Apparatus according to claim 1, characterized in that each clamping roller (8, 9) is supported at a pivot arm (10, 11) which is held in a pivot (12) in the body (K) of rotation, said pivots (12) having equal distance from the axis (A) of the moving rope, said pivot arms (10, 11) being connected with a common connecting rod (14) which is pivotably connected with one pivot arm (10) at its side facing the clamping roller (9) with respect to the pivot (12) and with the other pivot arm (11) at its opposite side of the clamping roller (9) with respect to the pivot (12).
  3. Apparatus according to claim 2, characterized in that the pivot distances between both clamping rollers (8, 9) of the pair (P) of rollers and the pivots (12) of their pivot arms (10, 11) are equal, the connecting rod (14) being directly connected with the pivot arm (10) between its pivot (12) and the clamping roller (9), and with the other pivot arm (11) at a prolongation (11a) of said pivot arm (11) at its opposite side of the clamping roller (8) with respect to the pivot (12), and the distances between the pivots (12) and the hinging points (16, 18) of the connecting rod (14) being equal.
  4. Apparatus according to claim 2 or 3, characterized in that in the case of the clamping rollers (8, 9) are touching each other, the distance between the pivots (12) transversal to the axis (A) of the moving rope is longer than the distance between the axis of the clamping rollers (8, 9), so that the pivot arms (10, 11) are converging from the pivots (12) to the clamping rollers (8, 9).
  5. Apparatus according to at least one of claims 2 to 4, characterized in that the pivots (12) are positioned before the clamping rollers (8, 9) seen in the direction of the movement of the rope.
  6. Apparatus according to at least one of claims 1 to 5, characterized in that each of the clamping rollers (8, 9) is provided with two pivot arms (10, 11) and two connecting rods (14).
  7. Apparatus according to at least one of claims 1 to 6, characterized in that the body (K) of rotation exhibits a circular main body (4) which is pivotably mounted in a frame (1), said main body (4) containing a support (7) for the pivots (12), and that at the frame (1) a potlike cover (18) is fixed at its border, said potlike cover (18) preferable consisting of plastic, containing a hole (19) at its bottom for the rope and covering the clamping rollers (8, 9) from outside.
  8. Apparatus according to claim 7, characterized in that the border of the cover (18) is fixed in a collecting channel (18a) at the frame (1), and that the main body (4) contains a flow directing piece (20) reaching to or into the collecting channel (18a) with its outer border.
  9. Apparatus according to claim 8, characterized in that the collecting channel (18a) contains an outlet (21) to which preferably a flowing off pipe or tube is connectable.
  10. Apparatus according to at least one of claims 1 to 9, which is supported in a supporting body (T), containing a guiding pulley (U), characterized in that the frame (1) is pivotably shored at a pivot axis (22) which is orientated parallel to the axis of the guiding pulley (U).
  11. Apparatus according to claim 10, characterized in that the frame (1) is hanged with at least one pivot stay (23) at the supporting body (T) at the side of the axis (A) of the moving rope, that the pivot stay (23) contains a lower pivot point (24) at the frame (1) which may be adjustable in the longitutdinal direction of the frame (1) and that the frame (1) is movebly guided in the supporting body (T) in a pin slit guide at the opposite side with respect to the axis (A) of the moving rope in a direction which is nearly perpendicular to the longitudinal axis of the suppporting body (T).
  12. Apparatus according to claim 7, characterized in that the frame (1) is provided with a motor (2) for the main body (4) and with a working connection (3) between the motor (2) and the main body (4).
EP92112498A 1991-07-26 1992-07-22 Untwisting device Expired - Lifetime EP0524614B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4124847 1991-07-26
DE4124847A DE4124847C2 (en) 1991-07-26 1991-07-26 Strand winder

Publications (2)

Publication Number Publication Date
EP0524614A1 EP0524614A1 (en) 1993-01-27
EP0524614B1 true EP0524614B1 (en) 1995-04-05

Family

ID=6437101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92112498A Expired - Lifetime EP0524614B1 (en) 1991-07-26 1992-07-22 Untwisting device

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EP (1) EP0524614B1 (en)
BR (1) BR9202872A (en)
DE (2) DE4124847C2 (en)
ES (1) ES2070559T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108754798A (en) * 2018-08-16 2018-11-06 青岛金誉佳纺织机械有限公司 A kind of loom assembly of devices with Weft Detwisting function
CN109402920B (en) * 2018-12-11 2024-05-28 福建宇邦纺织科技有限公司 Untwisting device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2248962A (en) * 1940-05-09 1941-07-15 Cook Percy Web manipulating apparatus
GB794503A (en) * 1954-11-20 1958-05-07 Derrick Foxwell Improvements in or relating to means for untwisting material in twisted rope form
IT1083518B (en) * 1977-06-15 1985-05-21 Bassani Mariano DETROCITURA SYSTEM OF ROPE FABRICS
DE2818648A1 (en) * 1978-04-27 1979-10-31 Mituru Kuroda Twist detecting device - using pair of grooved drums to monitor twist in roped fabric web and actuate a detwister

Also Published As

Publication number Publication date
EP0524614A1 (en) 1993-01-27
DE4124847A1 (en) 1993-02-25
ES2070559T3 (en) 1995-06-01
BR9202872A (en) 1993-03-30
DE59201822D1 (en) 1995-05-11
DE4124847C2 (en) 1995-04-20

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