EP0873439A1 - Device for producing a leno selvedge, in particular for shuttleless looms - Google Patents

Device for producing a leno selvedge, in particular for shuttleless looms

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Publication number
EP0873439A1
EP0873439A1 EP96945811A EP96945811A EP0873439A1 EP 0873439 A1 EP0873439 A1 EP 0873439A1 EP 96945811 A EP96945811 A EP 96945811A EP 96945811 A EP96945811 A EP 96945811A EP 0873439 A1 EP0873439 A1 EP 0873439A1
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EP
European Patent Office
Prior art keywords
arms
rotating body
leno
rotation
threads
Prior art date
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Granted
Application number
EP96945811A
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German (de)
French (fr)
Other versions
EP0873439B1 (en
Inventor
Kurt Hockemeyer
Matthias Klöcker
Christoph Schwemmlein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebrueder Kloecker GmbH
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Kloecker Entwicklungs GmbH
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Application filed by Kloecker Entwicklungs GmbH filed Critical Kloecker Entwicklungs GmbH
Publication of EP0873439A1 publication Critical patent/EP0873439A1/en
Application granted granted Critical
Publication of EP0873439B1 publication Critical patent/EP0873439B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C7/00—Leno or similar shedding mechanisms
    • D03C7/04—Mechanisms having discs oscillating about a weftwise axis and having apertures for warp threads

Definitions

  • the invention relates to a device for forming a leno edge, in particular for defenseless weaving machines, comprising a drivable rotational body, the rotational body having at least two guide elements for the leno threads spaced apart from one another.
  • a device of the type mentioned is known from DE-PS 44 05 776.
  • an electrically controllable servomotor is provided which drives a rotating disk, the rotating disk forming the rotor of the electrically controllable servomotor.
  • the stator itself can be attached to the weaving machine by means of a carrier part, and preferably in a space between the longitudinal struts and strands in front of the first weaving shafts of the weaving machine.
  • the rotating disk, which forms the rotor of the electrically controllable servomotor has two openings arranged opposite one another for guiding each of a leno thread as guide elements.
  • This known rotary edge turner of a weaving machine now works in such a way that it makes a few hundred revolutions in one direction and thereby binds a weft thread after each revolution. This creates a full-turn edge.
  • these leno threads twist in accordance with the number of revolutions of the turntable, so that in order to cancel this twist, a reversal of the direction of rotation is indicated, so the turntable must therefore rotate in exactly the opposite direction.
  • the number of revolutions in each direction must be the same on average over time. If the direction of rotation were not reversed, the leno threads would break at some point due to the increasing tension due to the increasing twist.
  • the invention is therefore based on the object of developing a device of the type mentioned at the outset in such a way that it is able to compensate for fluctuations in the thread tension of the leno threads.
  • the object is achieved in that the guide elements for compensating for thread tension fluctuations in the axial direction of the rotating body are resilient.
  • the resilient design of the guide elements in the axial direction of the rotating body and the corresponding bending of the guide elements compensate for otherwise occurring fluctuations in the thread tension of the leno threads.
  • the guide elements are therefore advantageous as in the axial direction of the Rotating body formed elastically resilient arms, which in particular have eyelets at the end for passing the leno threads.
  • the arms themselves can be of a light design, since they are hardly used. They therefore represent a comparatively negligible mass.
  • the size of the rotor is then independent of the desired opening angle of the compartment. This means that a small motor with a correspondingly smaller rotor can be selected, which then also has a correspondingly low mass, since due to the arrangement of the arms arranged on the rotor, the designer is now free to choose the size and the design, except for the performance requirements Diameter of the motor is.
  • the rotary body and here in particular the rotor, has a bore in the region of its axis of rotation for the implementation of the leno threads.
  • the leno threads can be passed through a hole arranged centrally in the rotating body, which improves the thread guidance, in particular with regard to a possible twisting in the area of this hole in the rotating body.
  • the arms are arranged on the end of the rotary body facing the tissue; each arm is advantageously hook-shaped at the end, the eyelet for guiding the leno thread being provided in the region of the hook-shaped bend.
  • the eyelet can have inserts to reduce the wear of the eyelet by guiding the leno thread;
  • sleeve-shaped inserts made of ceramic materials are conceivable.
  • the rotary body is arranged on the weaving machine in such a way that the axis of rotation either runs parallel or at an angle of up to 90 ° to the warp threads.
  • the device is brought directly to the tissue edge in an optimal manner, so that a leno edge can also be arranged directly at the tissue end.
  • it may be necessary to provide further arms which are arranged parallel to the arms arranged on the end facing the tissue and correspondingly arranged on the opposite end of the rotary body. These additional arms may therefore be necessary to ensure proper twisting of the leno threads in the area where the leno threads are fed from the bobbins.
  • Figure 1 shows schematically the almost right-angled arrangement of the device according to the invention for tissue, the shafts and reed are omitted for clarity;
  • Figure 2 shows the device schematically in one position
  • the axis of rotation of the rotating body runs parallel to the warp threads
  • Figure 3 shows a position of the rotating body at an angle of about 45 ° to the warp threads
  • Figure 4 shows the binding scheme of a full-turn edge.
  • a motor designated overall by 10 which has a central bore 11 for carrying out the leno threads 20, 30.
  • the axis of rotation extends transversely to the warp threads 40, that is to say essentially parallel to the weft threads 50.
  • two pairs of arms 60, 70 are provided.
  • Each pair of arms 60, 70 consists of two arms 61, 62 and 71, 72, respectively.
  • the two pairs of arms run parallel to one another and are fastened to the respective front end of the rotating body 10, as can be clearly seen in FIG.
  • the arms 61, 62 and 71, 71 are bent in the shape of a hook at the end and have the eyelets 73, 74 and 63, 64 in the region of the hook-shaped bend. These eyelets serve to pass the leno threads 20, 30, which are drawn off from the bobbins 80, 90.
  • the arms 61, 62 and 71, 72 are designed to be resilient in the axial direction (arrow 200) of the rotary body 10 in order to be able to compensate for fluctuations in the thread tension.
  • the threads are also twisted (at 110), which is canceled again by reversing the direction of rotation of the rotating body in one direction after a certain number of revolutions. Untwisting of the leno edge 100 is avoided in that the weft threads 50 lie between the leno threads. This means that even when untwisting the twist 110 on the other side in the area of the fabric, another fabric edge is created by twisting with the corresponding weft threads.
  • the operation of the device is such that, for example, a rotor designed as a rotor of a motor, the rotor is driven so that its rotation is synchronized with the shaft movement, so that there is a necessary opening for the weft thread insertion and in connection with the twist an edge binding results.
  • premature setting can also be achieved by a corresponding phase shift in the synchronization between the rotary movement of the rotating body and the shaft movement. This means that such a device works independently of the shaft, in contrast to edging devices which are arranged on the heald frames.
  • the edge can be significantly closer to the tissue when the Device can be arranged according to Figure 3.
  • the device has a position of approximately 45 ° to the tissue.
  • a thread guide 120 is provided in the form of a roller or roller in order to be able to guide the threads to the fabric in such a way that a proper compartment opening can be created.
  • the weave that can be produced with such a device presents itself as a so-called full-twist weave, which means that every weft thread is completely bound by the weave.
  • Such a fabric edge is extremely stable in spite of only three threads and, due to the use of only three threads, has a small thickness, so that the fabric does not appear on the tree in the edge region and therefore does not run.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

PCT No. PCT/DE96/01908 Sec. 371 Date Jun. 5, 1998 Sec. 102(e) Date Jun. 5, 1998 PCT Filed Oct. 3, 1996 PCT Pub. No. WO97/24480 PCT Pub. Date Jul. 10, 1997Device for producing a leno selvedge, in particular for a loom, including an electromotor with a rotor, whereas the rotor has at least two spaced guide elements for the leno threads, whereas the guide elements are designed as being elastic and flexible so that they can compensate fluctuations in thread tension in direction of the electromotor's, axis.

Description

Vorrichtung zum Bilden einer Dreherkante, insbesondere für schützenlose Webmaschinen.Device for forming a leno edge, in particular for weaver machines without protection.
Die Erfindung betrifft eine Vorrichtung zum Bilden einer Dreherkante, insbesondere für schützenlose Webmaschinen, umfassend einen antreibbaren Rotationskörper, wobei der Rotationskörper beabstandet zueinander mindestens zwei Führungselemente für die Dreherfäden aufweist.The invention relates to a device for forming a leno edge, in particular for defenseless weaving machines, comprising a drivable rotational body, the rotational body having at least two guide elements for the leno threads spaced apart from one another.
Eine Vorrichtung der eingangs genannten Art ist aus der DE-PS 44 05 776 bekannt. Hierbei ist ein elektrisch ansteuerbarer Stellmotor vorgesehen, der eine Dreherscheibe antreibt, wobei die Dreherscheibe den Läufer des elektrisch ansteuerbaren Stellmotors bildet. Der Stator selbst ist durch ein Trägerteil an der Webmaschine anbringbar, und zwar vorzugsweise in einem zwischen den Längsstreben und Litzen liegenden Freiraum vor den ersten Webschäften der Webmaschine. Im einzelnen ist hierbei vorgesehen, daß die Dreherscheibe, die den Läufer des elektrisch ansteuerbaren Stellmotors bildet, als Führungselemente zwei einander gegenüberliegend angeordnete Öffnungen zum Durchführen jeweils eines Dreherfadens aufweist. Dieser bekannte Rotations-Kantendreher einer Webmaschine arbeitet nun derart, daß er einige hundert Umdrehungen in einer Richtung durchführt und hierbei nach jeweils einer Umdrehung einen Schußfaden abbindet. Es entsteht somit eine Volldreherkante. Auf der Seite der Zuführung der beiden Dreherfäden verdrillen sich diese Dreherfäden entsprechend der Anzahl der Umdrehungen der Drehscheibe, so daß, um diese Verdrillung aufzuheben, eine Drehrichtungsumkehr angezeigt ist, mithin also die Dreherscheibe in genau die entgegengesetzte Richtung rotieren muß. Die Anzahl der Umdrehungen in jeder Richtung muß hierbei im zeitlichen Mittel gleich sein. Würde keine Drehrichtungsumkehr vorgenommen werden, so würden die Dreherfäden aufgrund der ansteigenden Spannung wegen der zunehmenden Verdrillung irgendwann reißen. Darüber hinaus stellt sich das Problem, daß bei Rotation der Führungselemente die Fadenspannung der durch die Führungselemente geführten Dreherfäden schwankt. Die Schwankungen sind abhängig von der Fadenlänge der Dreherfäden, die wiederum abhängig ist vom Drehwinkel und von der Winkelstellung der Vorrichtung zu der Webmaschine. Bei empfindlichen Garnen besteht aufgrund der Schwankungen in der Fadenspannung die Gefahr, daß der Faden reißt.A device of the type mentioned is known from DE-PS 44 05 776. In this case, an electrically controllable servomotor is provided which drives a rotating disk, the rotating disk forming the rotor of the electrically controllable servomotor. The stator itself can be attached to the weaving machine by means of a carrier part, and preferably in a space between the longitudinal struts and strands in front of the first weaving shafts of the weaving machine. In particular, it is provided that the rotating disk, which forms the rotor of the electrically controllable servomotor, has two openings arranged opposite one another for guiding each of a leno thread as guide elements. This known rotary edge turner of a weaving machine now works in such a way that it makes a few hundred revolutions in one direction and thereby binds a weft thread after each revolution. This creates a full-turn edge. On the side of the feed of the two leno threads, these leno threads twist in accordance with the number of revolutions of the turntable, so that in order to cancel this twist, a reversal of the direction of rotation is indicated, so the turntable must therefore rotate in exactly the opposite direction. The number of revolutions in each direction must be the same on average over time. If the direction of rotation were not reversed, the leno threads would break at some point due to the increasing tension due to the increasing twist. In addition, there is the problem that when the guide elements rotate, the thread tension of the leno threads guided by the guide elements fluctuates. The fluctuations depend on the thread length of the leno threads, which in turn is dependent on the angle of rotation and the angular position of the device relative to the weaving machine. With sensitive yarns there is a risk that the thread will break due to the fluctuations in the thread tension.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art derart weiterzubilden, daß diese in der Lage ist, Schwankungen in der Fadenspannung der Dreherfäden zu kompensieren.The invention is therefore based on the object of developing a device of the type mentioned at the outset in such a way that it is able to compensate for fluctuations in the thread tension of the leno threads.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Führungselemente zur Kompensation von Fadenspannungsschwankungen in Achsrichtung des Rotationskörpers federnd nachgiebig ausgebildet sind. Durch die federnde Ausbildung der Führungselemente in axialer Richtung des Rotationskörpers und die entsprechende Verbiegung der Führungselemente, erfolgt eine Kompensation von ansonsten auftretenden Schwankungen in der Fadenspannung der Dreherfäden.The object is achieved in that the guide elements for compensating for thread tension fluctuations in the axial direction of the rotating body are resilient. The resilient design of the guide elements in the axial direction of the rotating body and the corresponding bending of the guide elements compensate for otherwise occurring fluctuations in the thread tension of the leno threads.
Bei den bekannten schnellaufenden Webmaschinen von bis zu 1200 Schuß pro Minute wurde ermittelt, daß nach einer Größenordnung von etwa 100 bis 1000 Umdrehungen in einer Richtung eine Drehrichtungsumkehr erfolgen sollte. Das heißt, daß nach dem Stand der Technik alle 10 bis 100 Sekunden der Läufer und damit die Arme des elektrischen ansteuerbaren Stellmotors umgesteuert werden muß. Aufgrund der Hubzahl einer Webmaschine stehen hierfür maximal 100 Millisekunden (msec) zur Verfügung. Das heißt, daß innerhalb von 100 msec der Läufer des Motors stillstehen muß und wieder in voller Geschwindigkeit in die entgegengesetzten Drehrichtung rotieren muß.In the known high-speed weaving machines of up to 1200 wefts per minute, it was determined that after an order of magnitude of approximately 100 to 1000 revolutions, the direction of rotation should be reversed. This means that according to the prior art, the rotor and thus the arms of the electrically controllable servomotor must be reversed every 10 to 100 seconds. Due to the number of strokes of a weaving machine, a maximum of 100 milliseconds (msec) are available for this. This means that the rotor of the motor must stand still within 100 msec and rotate again at full speed in the opposite direction of rotation.
Vorteilhaft sind daher die Führungselemente als in axialer Richtung des Rotationskörpers elastisch nachgiebige Arme ausgebildet, die insbesondere endseitig Ösen zur Durchführung der Dreherfäden aufweisen. Die Arme selbst können durchaus leicht ausgebildet sein, da sie im wesentlichen kaum beansprucht werden. Sie stellen somit eine vergleichsweise vernachlässigbare Masse dar. Insbesondere bei der Verwendung eines Elektromotors ist dann die Größe des Rotors unabhängig von dem gewünschten Öffnungswinkel des Fachs. Das heißt, es kann ein kleiner Motor mit entsprechend kleinerem Rotor gewählt werden, der dann auch eine entsprechend geringe Masse besitzt, da aufgrund der Anordnung der am Rotor angeordneten Arme der Konstrukteur nunmehr, bis auf die Leistungsanforderungen, frei in der Wahl der Größe und des Durchmessers des Motors ist. Es können deshalb auch Motoren mit geringem Durchmesser und mit entsprechend geringen bewegten Massen zum Einsatz kommen, ohne daß die Gefahr besteht, daß keine ordnungsgemäße Fachöffnung bereitgestellt werden kann. Denn durch die Länge der Arme, die an dem Rotationskörper angeordnet sind, kann der Abstand der Ösen in den Armen und damit die Größe der Fachöffnung im wesentlichen frei gewählt werden. Die Arme sind im wesentlichen rechtwinklig zur Rotationsachse des Rotationskörpers und somit radial abstehend, ähnlich den Flügeln eines Propellers, an dem Rotationskörper angeordnet. Um zu gewährleisten, daß die Arme in Abhängigkeit von der Stellung der Webschäfte der Webmaschine immer die durch die Steuerung der Vorrichtung vorgesehene optimale Stellung einnehmen zu können, ist vorgesehen, daß die Arme in Umfangsrichtung steif ausgebildet sind.The guide elements are therefore advantageous as in the axial direction of the Rotating body formed elastically resilient arms, which in particular have eyelets at the end for passing the leno threads. The arms themselves can be of a light design, since they are hardly used. They therefore represent a comparatively negligible mass. In particular when using an electric motor, the size of the rotor is then independent of the desired opening angle of the compartment. This means that a small motor with a correspondingly smaller rotor can be selected, which then also has a correspondingly low mass, since due to the arrangement of the arms arranged on the rotor, the designer is now free to choose the size and the design, except for the performance requirements Diameter of the motor is. Motors with a small diameter and with correspondingly small moving masses can therefore also be used without the risk that no proper compartment opening can be provided. Because the length of the arms, which are arranged on the rotating body, the distance between the eyes in the arms and thus the size of the compartment opening can be chosen essentially freely. The arms are arranged essentially at right angles to the axis of rotation of the rotating body and thus radially projecting from the rotating body, similar to the blades of a propeller. In order to ensure that the arms can always assume the optimal position provided by the control of the device depending on the position of the heald frames of the weaving machine, it is provided that the arms are rigid in the circumferential direction.
Nach einem vorteilhaften Merkmal der Erfindung weist der Rotationskörper, und hier insbesondere der Rotor im Bereich seiner Rotationsachse eine Bohrung zur Durchführung der Dreherfäden auf. Das heißt, daß die Dreherfäden durch eine zentrisch im Rotationskörper angeordnete Bohrung durch diesen hindurchführbar sind, was die Fadenführung, insbesondere im Hinblick auf eine mögliche Verdrillung im Bereich dieser Bohrung des Rotationskörpers, verbessert. Im einzelnen ist vorgesehen, daß die Arme am auf das Gewebe zugerichteten, stirnseitigen Ende des Rotationskörpers angeordnet sind; hierbei ist jeder Arm vorteilhaft endseitig hakenförmig ausgebildet, wobei im Bereich der hakenförmigen Biegung die Öse zur Führung des Dreherfadens vorgesehen ist. Die Öse kann Einsätze aufweisen, um den Verschleiß der Öse durch die Führung des Dreherfadens zu vermindern; denkbar sind insbesondere hülsenförmige Einsätze aus keramischen Werkstoffen.According to an advantageous feature of the invention, the rotary body, and here in particular the rotor, has a bore in the region of its axis of rotation for the implementation of the leno threads. This means that the leno threads can be passed through a hole arranged centrally in the rotating body, which improves the thread guidance, in particular with regard to a possible twisting in the area of this hole in the rotating body. In particular, it is provided that the arms are arranged on the end of the rotary body facing the tissue; each arm is advantageously hook-shaped at the end, the eyelet for guiding the leno thread being provided in the region of the hook-shaped bend. The eyelet can have inserts to reduce the wear of the eyelet by guiding the leno thread; In particular, sleeve-shaped inserts made of ceramic materials are conceivable.
Nach einem weiteren Merkmal der Erfindung ist der Rotationskörper derart an der Webmaschine angeordnet, daß die Rotationsachse entweder parallel oder in einem Winkel von bis zu 90 ° zu den Kettfäden verläuft. Insbesondere bei einer Winkelstellung von fast 90 ° wird die Vorrichtung in optimaler Weise unmittelbar an die Gewebekante gebracht, so daß eine Dreherkante auch unmittelbar am Gewebeende angeordnet werden kann. Hierbei kann es nach einem weiteren Merkmal der Erfindung erforderlich sein, parallel zu den am auf das Gewebe zugerichteten stirnseitigen Ende angeordneten Arme, am gegenüberliegenden stirnseitigen Ende des Rotationskörpers entsprechend angeordnete weitere Arme vorzusehen. Diese weiteren Arme können deswegen erforderlich sein, um eine ordnungsgemäße Verdrillung der Dreherfäden im Bereich der Zuführung der Dreherfäden von den Spulen zu gewährleisten. Dies deshalb, damit die Verdrillung der Dreherfäden im Zuführungsbereich der Fäden von den Spulen mit Drehrichtungsumkehr des Rotationskörpers in gleicher Weise entdrillt werden können, wie sie verdrillt wurden. Diese Problematik tritt in dieser Form nicht auf, wenn der Rotationskörper mit seiner Rotationsachse parallel zu den Kettfäden der Webmaschine angeordnet ist.According to a further feature of the invention, the rotary body is arranged on the weaving machine in such a way that the axis of rotation either runs parallel or at an angle of up to 90 ° to the warp threads. In particular, at an angular position of almost 90 °, the device is brought directly to the tissue edge in an optimal manner, so that a leno edge can also be arranged directly at the tissue end. According to a further feature of the invention, it may be necessary to provide further arms which are arranged parallel to the arms arranged on the end facing the tissue and correspondingly arranged on the opposite end of the rotary body. These additional arms may therefore be necessary to ensure proper twisting of the leno threads in the area where the leno threads are fed from the bobbins. This is so that the twisting of the leno threads in the feed area of the threads can be untwisted by the bobbins with reversal of the direction of rotation of the rotating body in the same way as they were twisted. This problem does not arise in this form if the rotary body is arranged with its axis of rotation parallel to the warp threads of the weaving machine.
Anhand der Zeichnung wird die Erfindung beispielhaft näher erläutert. Figur 1 zeigt schematisch die nahezu rechtwinklige Anordnung der erfindungsgemäßen Vorrichtung zum Gewebe, wobei die Schäfte und das Riet wegen der besseren Übersicht weggelassen sind;The invention is explained in more detail by way of example with reference to the drawing. Figure 1 shows schematically the almost right-angled arrangement of the device according to the invention for tissue, the shafts and reed are omitted for clarity;
Figur 2 zeigt die Vorrichtung schematisch in einer Stellung, wobei dieFigure 2 shows the device schematically in one position, the
Rotationsachse des Rotationskörpers parallel zu den Kettfäden verläuft;The axis of rotation of the rotating body runs parallel to the warp threads;
Figur 3 zeigt eine Stellung des Rotationskörpers in einem Winkel von etwa 45 ° zu den Kettfäden;Figure 3 shows a position of the rotating body at an angle of about 45 ° to the warp threads;
Figur 4 zeigt das Bindeschema einer Volldreherkante.Figure 4 shows the binding scheme of a full-turn edge.
Bei der in den Figuren 1 bis 3 dargestellten Vorrichtung 1 ist ein insgesamt mit 10 bezeichneter Motor vorgesehen, der zur Durchführung der Dreherfäden 20, 30 eine zentrische Bohrung 1 1 besitzt. Bei der in Figur 1 dargestellten Ausführungsform, bei der die Rotationsachse quer zu den Kettfäden 40, das heißt im wesentlichen parallel zu den Schußfäden 50 verläuft, sind zwei Armpaare 60, 70 vorgesehen. Jedes Armpaar 60, 70 besteht aus zwei Armen 61 , 62 bzw. 71 , 72. Die beiden Armpaare verlaufen parallel zueinander und sind am jeweils stirnseitigen Ende des Rotationskörpers 10 befestigt, wie sich dies Figur 1 deutlich erkennen läßt. Die Arme 61 , 62 bzw. 71 , 71 sind endseitig hakenförmig gebogen ausgebildet und weisen im Bereich der hakenförmigen Biegung die Ösen 73, 74 bzw. 63, 64 auf. Diese Ösen dienen der Durchführung der Dreherfäden 20, 30, die von den Garnspulen 80, 90 abgezogen werden. Darüber hinaus sind die Arme 61 , 62 bzw. 71 , 72 in axialer Richtung (Pfeil 200) des Rotationskörpers 10 federnd nachgiebig ausgebildet, um Schwankungen in der Fadenspannung kompensieren zu können. Bei Rotation der Armpaare 60, 70 entsteht im Bereich des Gewebes die Volldreherkante 100 (Fig. 4). Im Bereich der Zuführung der Dreherfäden 20, 30 von den Garnspulen 80, 90 erfolgt ebenfalls eine Verdrillung der Fäden (bei 1 10), die dadurch wieder aufgehoben wird, daß die Drehrichtung des Rotationskörpers nach einer bestimmten Anzahl Umdrehungen in einer Richtung umgekehrt wird. Eine Entdrillung der Dreherkante 100 wird hierbei dadurch vermieden, daß zwischen den Dreherfäden die Schußfäden 50 einliegen. Das heißt, daß auch bei der Entdrillung der Verdrillung 1 10 auf der anderen Seite im Bereich des Gewebes eine weitere Gewebekante durch Verdrillung mit den entsprechenden Schußfäden entsteht.In the device 1 shown in FIGS. 1 to 3, a motor, designated overall by 10, is provided which has a central bore 11 for carrying out the leno threads 20, 30. In the embodiment shown in FIG. 1, in which the axis of rotation extends transversely to the warp threads 40, that is to say essentially parallel to the weft threads 50, two pairs of arms 60, 70 are provided. Each pair of arms 60, 70 consists of two arms 61, 62 and 71, 72, respectively. The two pairs of arms run parallel to one another and are fastened to the respective front end of the rotating body 10, as can be clearly seen in FIG. The arms 61, 62 and 71, 71 are bent in the shape of a hook at the end and have the eyelets 73, 74 and 63, 64 in the region of the hook-shaped bend. These eyelets serve to pass the leno threads 20, 30, which are drawn off from the bobbins 80, 90. In addition, the arms 61, 62 and 71, 72 are designed to be resilient in the axial direction (arrow 200) of the rotary body 10 in order to be able to compensate for fluctuations in the thread tension. When the arm pairs 60, 70 rotate, the full-turn edge 100 is formed in the area of the fabric (FIG. 4). In the area of the supply of the leno threads 20, 30 from the yarn packages 80, 90, the threads are also twisted (at 110), which is canceled again by reversing the direction of rotation of the rotating body in one direction after a certain number of revolutions. Untwisting of the leno edge 100 is avoided in that the weft threads 50 lie between the leno threads. This means that even when untwisting the twist 110 on the other side in the area of the fabric, another fabric edge is created by twisting with the corresponding weft threads.
Die Arbeitsweise der Vorrichtung ist nun derart, daß bei beispielsweise einem als Rotor eines Motors ausgebildeten Rotationskörpers der Rotor so angetrieben wird, daß seine Drehung mit der Schaftbewegung synchronisiert ist, so daß sich die erforderliche Fachöffnung für den Schußfadeneintrag und in Verbindung mit der Verdrehung eine Kantenabbindung ergibt. Wahlweise kann durch einen entsprechenden Phasenversatz in der Synchronisation zwischen der Drehbewegung des Rotationskörpers und der Schaftbewegung auch eine vorzeitige Abbindung erreicht werden. Das heißt, eine derartige Vorrichtung arbeitet schaftunabhängig, im Gegensatz zu Kantenapparaten, die an den Webschäften eingeordnet sind.The operation of the device is such that, for example, a rotor designed as a rotor of a motor, the rotor is driven so that its rotation is synchronized with the shaft movement, so that there is a necessary opening for the weft thread insertion and in connection with the twist an edge binding results. Optionally, premature setting can also be achieved by a corresponding phase shift in the synchronization between the rotary movement of the rotating body and the shaft movement. This means that such a device works independently of the shaft, in contrast to edging devices which are arranged on the heald frames.
Bei der in Figur 2 dargestellten parallel verlaufenden Anordnung der Rotationsachse zu den Kettfäden 40, bei der die Schäfte mit 130 und das Riet mit 140 bezeichnet sind, gibt es naturgemäß nur geringe Probleme bei der Zuführung der Dreherfäden 20, 30 zu der Vorrichtung. Allerdings ist bei der in Figur 2 dargestellten Stellung des Rotationskörpers zum Gewebe ein relativ großer Abstand zum Gewebe vorhanden, so daß die Dreherkante nicht unmittelbar am Gewebe angeordnet werden kann.In the arrangement of the axis of rotation parallel to the warp threads 40 shown in FIG. 2, in which the shafts are denoted by 130 and the reed by 140, there are naturally only minor problems in feeding the leno threads 20, 30 to the device. However, in the position of the rotary body to the tissue shown in FIG. 2, there is a relatively large distance from the tissue, so that the leno edge cannot be arranged directly on the tissue.
Wesentlich näher am Gewebe kann die Kante bei der Stellung der Vorrichtung gemäß Figur 3 angeordnet werden. Hier nämlich hat die Vorrichtung eine Stellung von etwa 45 ° zum Gewebe. Allerdings ist hierbei eine Fadenführung 120 in Form einer Rolle oder Walze vorgesehen, um die Fäden derart zum Gewebe führen zu können, daß eine ordnungsgemäße Fachöffnung erzeugbar ist.The edge can be significantly closer to the tissue when the Device can be arranged according to Figure 3. Here the device has a position of approximately 45 ° to the tissue. However, a thread guide 120 is provided in the form of a roller or roller in order to be able to guide the threads to the fabric in such a way that a proper compartment opening can be created.
Die Bindung, die mit einer derartigen Vorrichtung herstellbar ist (Figur 4), stellt sich als sogenannte Volldreherbindung dar, das heißt, es wird durch die Bindung jeder Schußfaden vollständig abgebunden. Eine derartige Gewebekante ist trotz nur dreier Fäden äußerst stabil und weist eben aufgrund der Verwendung von nur drei Fäden eine geringe Dicke auf, so daß das Gewebe auf dem Baum im Randbereich nicht aufträgt und somit auch nicht verläuft. The weave that can be produced with such a device (FIG. 4) presents itself as a so-called full-twist weave, which means that every weft thread is completely bound by the weave. Such a fabric edge is extremely stable in spite of only three threads and, due to the use of only three threads, has a small thickness, so that the fabric does not appear on the tree in the edge region and therefore does not run.

Claims

Pa te n ta n s p rüc h e Pa te n ta nsp rüc he
1. Vorrichtung zum Bilden einer Dreherkante, insbesondere für eine Webmaschine, umfassend einen antreibbaren Rotationskörper, wobei der Rotationskörper beabstandet zueinander mindestens zwei Führungselemente für die Dreherfäden aufweist, dad u rc h geke n nzeic h ne t, daß die Führungselemente (60, 70) zur Kompensation von Fadenspannungsschwankungen in Achsrichtung des Rotationskörpers (10) federnd nachgiebig ausgebildet sind.1. Device for forming a leno edge, in particular for a weaving machine, comprising a drivable rotating body, the rotating body having at least two guide elements for the leno threads spaced apart from one another, so that the guide elements (60, 70) are not known. to compensate for thread tension fluctuations in the axial direction of the rotating body (10) are designed to be resilient.
2. Vorrichtung nach Anspruch 1, d ad u rc h g e ken n ze ic h net, daß die Führungselemente als in axialer Richtung des Rotationskörpers elastisch nachgiebige Arme (61, 62; 71, 72) ausgebildet sind.2. Device according to claim 1, d ad u rc h g e ken n ze ic h net that the guide elements are designed as in the axial direction of the rotating body elastically resilient arms (61, 62; 71, 72).
3. Vorrichtung nach Anspruch 1 oder Anspruch 2, d ad u rc h ge ken n c h ze inet, daß die Arme (61, 62; 71, 72) endseitig Ösen (63, 64; 7374) zur Durchführung der Dreherfäden (20, 30) aufweisen.3. Apparatus according to claim 1 or claim 2, d ad u rc h ge ken nch ze inet that the arms (61, 62; 71, 72) at the ends eyelets (63, 64; 7374) for carrying out the leno threads (20, 30 ) exhibit.
4. Vorrichtung nach einem der voranstehenden Ansprüche, dad u rc h geke n n ze ic h net, daß die Arme (61, 62; 71, 72) in Umfangsrichtung steif ausgebildet sind.4. Device according to one of the preceding claims, that the arms (61, 62; 71, 72) are rigid in the circumferential direction.
5. Vorrichtung nach einem der voranstehenden Ansprüche, dad u rc h g e ken n zeic h net, daß der Rotationskörper (10) im Bereich seiner Drehachse eine Bohrung (11) zur Durchführung der Dreherfäden (20, 30) aufweist. 5. Device according to one of the preceding claims, that the rotation body (10) has a bore (11) in the region of its axis of rotation for carrying out the leno threads (20, 30).
6. Vorrichtung nach einem der voranstehenden Ansprüche, d a d u rc h g e k e n n ze ic h net, daß der Arm (61, 62; 71, 72) endseitig hakenförmig gebogen ausgebildet ist, wobei im Bereich der hakenförmigen Biegung die Öse (63, 64; 73, 74) vorgesehen ist.6. Device according to one of the preceding claims, dadu rc hgekenn ze ic h net that the arm (61, 62; 71, 72) is formed hook-shaped at the end, wherein in the region of the hook-shaped bend the eyelet (63, 64; 73, 74) is provided.
7. Vorrichtung nach einem der voranstehenden Ansprüche, d a d u rc h g e k e n n ze ic h ne t, daß die Arme (61, 62; 71, 72) am auf das Gewebe zugerichteten, stirnseitigen Ende des Rotationskörpers (10) angeordnet sind.7. Device according to one of the preceding claims, so that the arms (61, 62; 71, 72) are arranged on the end of the rotary body (10) facing the tissue.
8. Vorrichtung nach einem der voranstehenden Ansprüche, d a d u rc h g e ke n n z e ic h ne t, daß parallel zu den am auf das Gewebe zugerichteten, stirnseitigen Ende angeordneten Arme (61, 62) am gegenüberliegenden stirnseitigen Ende weitere Arme (71, 72) vorgesehen sind.8. Device according to one of the preceding claims, dadu rc hge ke nnze ic h ne t that further arms (71, 72) are provided parallel to the arms (61, 62) arranged on the tissue facing the front end at the opposite front end are.
9. Vorrichtung nach einem der voranstehenden Ansprüche, d ad u rc h g e k en n z e ic h n e t, daß der Rotationskörper (10) derart an der Webmaschine angeordnet ist, daß die Rotationsachse parallel oder in einem Winkel bis zu 90 ° zu den Kettfäden (40) verläuft.9. Device according to one of the preceding claims, d ad u rc hgek en nze ic hnet that the rotary body (10) is arranged on the weaving machine in such a way that the axis of rotation parallel or at an angle up to 90 ° to the warp threads (40) runs.
10. Vorrichtung nach einem der voranstehenden Ansprüche, d a d u rc h ge ke n n ze ic h n et, daß die Arme (61, 62; 71, 72) radial verstellbar an dem Rotationskörper (10) anbringbar sind. 10. Device according to one of the preceding claims, that the arms (61, 62; 71, 72) are radially adjustable on the rotating body (10) can be attached.
11. Vorrichtung nach einem der voranstehenden Ansprüche, dad u rc h ge ke n n ze ic h net, daß die Armlänge der Arme (61, 62; 71, 72) veränderbar ist.11. Device according to one of the preceding claims, that the arm length of the arms (61, 62; 71, 72) can be changed.
12. Vorrichtung nach einem der voranstehenden Ansprüche, dadu rc h geke n nze ic h net, daß der Rotationskörper (10) der Rotor eines Elektromotors ist.12. Device according to one of the preceding claims, dadu rc h geke nze ic h net that the rotating body (10) is the rotor of an electric motor.
13. Vorrichtung nach Anspruch 11 , da d u rc h geke n n ze ic h net, daß der Rotor eine zentrische Bohrung (11) zur Durchführung der Dreherfäden (20, 30) aufweist.13. The apparatus according to claim 11, since d e rc h geken n ze ic h net that the rotor has a central bore (11) for carrying out the leno threads (20, 30).
14. Vorrichtung nach einem der voranstehenden Ansprüche, d ad u rc h geke n n zeic h net, daß die Arme (61, 62; 71, 72) rechtwinklig zur Rotationsachse des Rotationskörpers (10) radial abstehend an dem Rotationskörper angeordnet sind.14. Device according to one of the preceding claims, d ad u rc h geke n n zeic h net that the arms (61, 62; 71, 72) are arranged at right angles to the axis of rotation of the rotary body (10) projecting radially on the rotary body.
15. Vorrichtung nach einem der voranstehenden Ansprüche, dad u rc h geken n ze ic hnet, daß der Rotationskörper (10) in seiner Drehrichtung umkehrbar ist. 15. Device according to one of the preceding claims, that the rotary body (10) is reversible in its direction of rotation.
EP96945811A 1995-12-28 1996-10-03 Device for producing a leno selvedge, in particular for shuttleless looms Expired - Lifetime EP0873439B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19548955 1995-12-28
DE19548955A DE19548955C1 (en) 1995-12-28 1995-12-28 Appts. to form a leno selvedge at shuttleless loom
PCT/DE1996/001908 WO1997024480A1 (en) 1995-12-28 1996-10-03 Device for producing a leno selvedge, in particular for shuttleless looms

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EP0873439A1 true EP0873439A1 (en) 1998-10-28
EP0873439B1 EP0873439B1 (en) 1999-07-28

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EP96919555A Expired - Lifetime EP0839219B1 (en) 1995-12-28 1996-05-21 Device for producing a leno selvedge, in particular for shuttleless looms
EP96945811A Expired - Lifetime EP0873439B1 (en) 1995-12-28 1996-10-03 Device for producing a leno selvedge, in particular for shuttleless looms

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EP (2) EP0839219B1 (en)
JP (2) JP3278811B2 (en)
CN (2) CN1046973C (en)
AT (2) ATE181378T1 (en)
CZ (2) CZ285536B6 (en)
DE (2) DE19548955C1 (en)
ES (2) ES2133969T3 (en)
GR (2) GR3030784T3 (en)
HK (1) HK1017911A1 (en)
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DE59602575D1 (en) 1999-09-02
JPH11501999A (en) 1999-02-16
CZ44598A3 (en) 1998-05-13
ES2133969T3 (en) 1999-09-16
CN1058306C (en) 2000-11-08
SI0839219T1 (en) 1999-10-31
WO1997024480A1 (en) 1997-07-10
CN1046973C (en) 1999-12-01
EP0873439B1 (en) 1999-07-28
CN1206440A (en) 1999-01-27
CN1189197A (en) 1998-07-29
ATE181378T1 (en) 1999-07-15
JP3278811B2 (en) 2002-04-30
ATE182637T1 (en) 1999-08-15
US6098669A (en) 2000-08-08
EP0839219B1 (en) 1999-06-16
GR3030784T3 (en) 1999-11-30
CZ285536B6 (en) 1999-08-11
US5996646A (en) 1999-12-07
GR3031444T3 (en) 2000-01-31
EP0839219A1 (en) 1998-05-06
DE19548955C1 (en) 1996-09-12
JP3248078B2 (en) 2002-01-21
CZ286439B6 (en) 2000-04-12
CZ202798A3 (en) 1999-01-13
HK1017911A1 (en) 1999-12-03
JPH11502905A (en) 1999-03-09
WO1997024479A1 (en) 1997-07-10
ES2135266T3 (en) 1999-10-16

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