EP0326784B1 - Braking method for a running thread, and thread brake to carry out the method - Google Patents

Braking method for a running thread, and thread brake to carry out the method Download PDF

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Publication number
EP0326784B1
EP0326784B1 EP88810825A EP88810825A EP0326784B1 EP 0326784 B1 EP0326784 B1 EP 0326784B1 EP 88810825 A EP88810825 A EP 88810825A EP 88810825 A EP88810825 A EP 88810825A EP 0326784 B1 EP0326784 B1 EP 0326784B1
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EP
European Patent Office
Prior art keywords
thread
braking
brake
brake according
rocker
Prior art date
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Application number
EP88810825A
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German (de)
French (fr)
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EP0326784A1 (en
Inventor
Erich Weidmann
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Loepfe AG Gebrueder
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Loepfe AG Gebrueder
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
    • B65H59/32—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged away from each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
    • B65H59/32—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged away from each other
    • B65H59/34—Surfaces movable automatically to compensate for variation in tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2555/00—Actuating means
    • B65H2555/10—Actuating means linear
    • B65H2555/13—Actuating means linear magnetic, e.g. induction motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the running thread or the thread-like structure is braked by a clamp and between a fixed and a movable brake shoe by one of a thread brake control device actuated electromagnet actuated, ie pressed against the fixed brake shoe so that the thread is clamped between the two.
  • a thread brake control device actuated electromagnet actuated ie pressed against the fixed brake shoe so that the thread is clamped between the two.
  • a somewhat flexible steel band has also been proposed as a fixed brake shoe.
  • a spring is used as a retraction element when the electromagnet is de-energized, which returns the movable brake shoe to its rest or starting position.
  • Such a thread brake based on the clamping principle, and in such an embodiment has significant disadvantages which, particularly in the case of threads made of polypropylene or jute, quickly rendered it unsuitable for operation.
  • threads made of polypropylene or jute For example, in the case of polypropylene thread material, the steel strips used as fixed brake shoes were destroyed within a few working layers.
  • built up after relatively few hours of operation due to the abrasion of fiber components and the fiber finishing materials on the side of the thread track ramparts on which the brake shoes were supported without effectively braking the thread. This leads to loose weft threads and thus to fabric defects.
  • the damage is particularly large due to the fact that a wrong or not inserted thread destroys the manufacture of the product, a certain larger number of meters, e.g.
  • the thread is guided along braking elements, its normal thread path not being influenced by these when the brake is released.
  • brake elements which belong to two brake element groups and which are arranged alternately along the thread axis, are moved against the thread and the thread is deflected by this into a meandering path, as a result of which the friction on the brake elements causes the thread to brake or to brake completely and to a standstill comes without being pinched.
  • the thread brake has a brake carrier 1 (or a housing), on which a slide-like positioning device 2 is displaceably guided and seated by means of a positioning screw 14.
  • the positioning device 2 carries on the one hand, the brake body, which is designed as a deflectably mounted organ, which is designed as a rocker 3, and, on the other hand, an adjusting device 4 for a force element 5.
  • This is designed as a displaceable bridge 6, which carries a part of force element magnets 7 assigned in pairs, the other part of the Force element magnets 7 is arranged in the rocker and both parts repel each other by their opposite polarity, that is to say they are effectively supported on one another.
  • the bridge 6 can be adjusted with respect to the rocker 3 with a bridge adjustment screw 9 seated in the adjusting device 4 for the force element.
  • This carries braking elements, which are loop-like thread guide elements 10.
  • braking elements which are loop-like thread guide elements 10.
  • two rocker stops 11 designed as cylindrical pins are suitable for the rocker 3, which cooperate with a rocker pin 12, and on the other hand, a brake block stop 13 is provided, both the rocker stops 11 and the brake block stop 13 being suitable for both organs Limit the range of movement in relation to the thread F in its normal position.
  • a fixedly arranged thread guide member 15, which is also designed like a loop, is also provided on the front ends of the positioning device 2 perpendicular to the thread axis for better thread guidance.
  • a brake block which has the shape of a pivotable bracket 16, is also articulated on the brake carrier 1.
  • a permanent magnet 17 and an iron plate 18 which improves the magnetic force effect are mounted on this bracket 16.
  • a first electromagnet 21 is fastened to the brake carrier 1 and, depending on the current supply from the thread brake control device 24 and corresponding polarization, interacts with the permanent magnet 17 to repel or attract it.
  • the thread brake control device 24 is located on a projectile sensor 26 and an open trigger 27 of the machine, which deliver machine signals that are required to generate the signals for the honeycomb brake.
  • the thread brake control device 24 switches off the current for the first electromagnet 21, as a result of which the thread is held to a suitable extent as a result of the force of the permanent magnet 17.
  • the thread brake control device 24 applies a reversely polarized current pulse of a suitable size to the first electromagnet 21, as a result of which the latter repels the permanent magnet 17 and thus releases the thread brake becomes.
  • a thread sensor for a thread monitor or thread run monitor can either be installed or installed in one of the thread guide members 10 or 15 or 20, the last variant being the cheapest solution and shown in FIG. 2.
  • This thread sensor 23 is connected to a thread monitor device 25 which is controlled by the thread brake control device 26. This in turn is connected to the machine sensors Open Trigger 27 and Projectile Sensor 26.
  • This variant has the significant advantage that the normally very high background noise level due to the high speeds of the textile machines and, accordingly, the high number of strokes of the brake actuation is reduced on the one hand by the new mode of operation of the thread brake, which does not cause sudden jamming, and on the other hand to the absolutely necessary monitoring phases in its Limited influence is maintained, but the procedurally ideal monitoring point for the thread running, namely in the immediate vicinity of the thread brake, is retained.
  • error messages from the stationary thread which are generally triggered by the basic disturbance level and which have previously been a frequent disturbance, are thus avoided, since a thread sensor signal that may occur is not passed on to the thread monitor device when the thread is stationary. So no interference signal can cause.
  • the variant with the permanent magnet there is also the possibility of holding the thread lightly and additionally reducing the interference signal of the stationary thread.
  • this arrangement according to the invention is very particularly advantageous in multi-color machines.
  • the thread sensors of all threads are connected to an evaluation device and together form the signal. This is possible because only one of the threads is running and can be identified differently. If, for example in the case of four threads, three resting threads give a resting basic disturbance signal to the evaluation device, then this is three times as large as a basic disturbance signal of an individual thread, with which the distance from the basic disturbance level to the signal level of the fourth, running thread can become so small that an evaluation of the run signal is no longer possible or is only possible with very significantly increased technical effort. Such a situation occurs especially when the three resting threads are thick threads and the running thread is a thin thread. The thin thread is then no longer effectively monitored.
  • the thread can be braked to a pre-set strength at predefined intervals of the working cycle of the machine without being completely braked and in other predefined intervals the working cycle of the machine can be completely braked.
  • Such interval-conform braking is particularly advantageous in rapier weaving machines for the interval of thread transfer from one rapier to another and the entry end interval. This allows the thread run freely and unchecked between these intervals. This is particularly desirable or almost necessary with many thread materials. With this proposed device, interval-compliant braking is possible even at today's extremely high thread speeds due to the much higher machine speeds. This despite an increase in the life of the thread brake closing elements.
  • a second electromagnet 22 can be provided, which is mounted on the bracket 16. The effect is correspondingly the same, only that the thread is not automatically held when the thread brake is de-energized. The thread brake is therefore not self-braking.
  • the force element 5 can be a spring which interacts with the adjustable bridge 6 and the rocker 3, which then both have no force element magnets 7.
  • the eyelet-like thread guide elements 10 of the brake body can have thread insertion openings (not shown), so that the thread F cannot be drawn in with tools in the direction of the thread axis, but can be inserted transversely to it without tools.

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  • Tension Adjustment In Filamentary Materials (AREA)
  • Looms (AREA)
  • Sewing Machines And Sewing (AREA)

Description

Die Erfindung bezieht sich auf ein Verfahren zum Abbremsen eines laufenden Fadens in einer Textilmaschine, wobei der Abbremsvorgang mittels gegeneinander versetzbaren Bremselementen durch Teilumschlingung der Bremselemente durch den Faden erfolgt, sowie auf eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for braking a running thread in a textile machine, the braking process being carried out by means of mutually displaceable braking elements by partially wrapping the braking elements through the thread, and to a device for carrying out the method.

Bei den bisher bekannten Fadenbremsen und Fadenbrems-Verfahren zum Stillsetzen des Fadens, beispielsweise nach der DE 0S 31 48 151 - LOEPFE, wird der laufende Faden oder das fadenartige Gebilde klemmend gebremst und zwischen einer festen und einer beweglichen Bremsbacke von einem von einer Fadenbrems-Steuereinrichtung angesteuerten Elektromagneten betätigt, d.h. gegen die feste Bremsbacke gedrückt, so dass der Faden zwischen beiden geklemmt wird. Als feste Bremsbacke wurde auch ein etwas nachgiebiges Stahlband vorgeschlagen. Zum Lösen der Fadenbremse wird bei stromlosem Elektromagneten als Rückzugselement eine Feder verwendet, die die bewegliche Bremsbacke in ihre Ruhe- oder Ausgangslage zurückbringt.In the previously known thread brakes and thread brake methods for stopping the thread, for example according to DE 0S 31 48 151 - LOEPFE, the running thread or the thread-like structure is braked by a clamp and between a fixed and a movable brake shoe by one of a thread brake control device actuated electromagnet actuated, ie pressed against the fixed brake shoe so that the thread is clamped between the two. A somewhat flexible steel band has also been proposed as a fixed brake shoe. To release the thread brake, a spring is used as a retraction element when the electromagnet is de-energized, which returns the movable brake shoe to its rest or starting position.

Eine solche Fadenbremse, basierend auf dem Klemmprinzip, und in solcher Ausgestaltung weist wesentliche Nachteile auf, welche insbesondere bei Fäden aus Polypropylen oder Jute innert kürzester Zeit zur Betriebsuntauglichkeit führten. Beispielsweise wurden beim Fadenmaterial Polypropylen die als feste Bremsbacken verwendeten Stahlbänder innert weniger Arbeitsschichten zerstört. Ausserdem bauten sich nach relativ wenigen Betriebstunden durch den Abrieb von Faserbestandteilen und der Faserveredelungsstoffe seitlich der Fadenlaufbahn Wälle auf, an welchen sich die Bremsbacken abstützten, ohne den Faden wirksam abzubremsen. Dies führt zu losen Schussfäden und damit zu Gewebefehlern. Die Schäden sind aber wegen des Umstandes besonders gross, dass ein falsch oder nicht eingebrachter Faden die Konfektionierung des Erzeugnisses, eine gewisse grössere Anzahl Meter, z.B. 100 m, fehlerfreien Gewebes zerstört und damit ein einziger fehlerhaft eingetragener Faden viele Produktionsstunden und eine grosse Menge des Produktes vernichtet, denn die so entstandenen kurzen Gewebestücke sind oft nicht äquivalent weiterverwertbar. Diese Schäden kommen zu den Umrüstverlusten hinzu, sind aber im allgemeinen viel bedeutender als diese. Dazu kommen auch noch die Materialkosten und die ebenfalls sehr hohen Produktionsausfallkosten. Darüberhinaus sind die sehr hohen Schaltfrequenzen, bedingt durch die zunehmenden Arbeitsgeschwindigkeiten der Textilmaschinen mit den bekannten Fadenbremsen nicht erreichbar. Mit diesen kann der Faden bei den nun üblichen Geschwindigkeiten nicht mehr im richtigen Zeitpunkt und so genau abgebremst werden, um fehlerfreie Gewebe zu ergeben.Such a thread brake, based on the clamping principle, and in such an embodiment has significant disadvantages which, particularly in the case of threads made of polypropylene or jute, quickly rendered it unsuitable for operation. For example, in the case of polypropylene thread material, the steel strips used as fixed brake shoes were destroyed within a few working layers. In addition, built up after relatively few hours of operation due to the abrasion of fiber components and the fiber finishing materials on the side of the thread track ramparts on which the brake shoes were supported without effectively braking the thread. This leads to loose weft threads and thus to fabric defects. However, the damage is particularly large due to the fact that a wrong or not inserted thread destroys the manufacture of the product, a certain larger number of meters, e.g. 100 m, of faultless fabric and thus a single incorrectly entered thread many production hours and a large amount of the product destroyed, because the short pieces of fabric created in this way are often not usable in an equivalent manner. This damage adds to the conversion loss, but is generally much more significant than this. Added to this are the material costs and the very high production downtime costs. In addition, the very high switching frequencies, due to the increasing operating speeds of the textile machines, cannot be achieved with the known thread brakes. With these, the thread can no longer be braked at the right times at the usual speeds and so precisely in order to produce faultless tissue.

Andererseits sind aus vielen Publikationen, wie z.B. der FR-A-2 300 734, der FR-A-545 845, der US-PS 3 578 256 und der US-PS 3 540 202 Durchlauf-Fadenbremsen bekannt, die auf den Faden eine durch die Fadenspannung selbst geregelte, möglichst konstante Bremskraft durch Teilumschlingung des Fadens um Bremselemente erzeugen. In solchen Bremsen ist kein freier Fadenlauf vorgesehen.On the other hand, many publications, e.g. the FR-A-2 300 734, the FR-A-545 845, the US-PS 3 578 256 and the US-PS 3 540 202 continuous thread brakes are known which on the thread a regulated by the thread tension itself, as constant as possible Generate braking force by partially wrapping the thread around brake elements. Free brakes are not provided in such brakes.

Aufgabe der Erfindung ist die Schaffung eines Verfahrens und einer Fadenbremse zur Abbremsung von laufenden Fäden zum Stillstand, insbesondere an Textilmaschinen, mit welchen auch sehr harte und fasrige Fäden bei kurzen Bremszeiten und bei höheren Schaltfrequenzen und Schaltzahlen als bisher zuverlässig und genau bezüglich dem vorgegebenen Verwendungszweck des Fadens zum Stillstand abgebremst werden können, wobei ein Selbstreinigungseffekt auftritt bzw. Verschmutzung keinen wesentlichen Einfluss auf die Wirksamkeit der Bremsung hat. Ausserdem soll der hohe Grundstörpegel reduziert werden und dessen Einfluss verringert werden.The object of the invention is to provide a method and a thread brake for braking running threads to a standstill, in particular on textile machines, with which even very hard and fibrous threads with short braking times and with higher switching frequencies and switching numbers than previously reliable and accurate with regard to the intended use of Thread can be braked to a standstill, with a self-cleaning effect occurring or contamination not having a significant influence on the effectiveness of the braking. In addition, the high background noise level should be reduced and its influence reduced.

Diese Aufgabe lässt sich erfindungsgemäss lösen durch das Verfahren gemäss dem Kennzeichen des Anspruchs 1 und durch die Vorrichtung gemäss dem Kennzeichen des Anspruchs 6.This object can be achieved according to the invention by the method according to the characterizing part of claim 1 and by the device according to the characterizing part of claim 6.

Weitere Merkmale der Erfindung ergeben sich aus der Beschreibung des Verfahrens und von Ausführungsbeispielen der Vorrichtung anhand der Zeichnung. In dieser zeigt

Fig. 1
das Bremsaggregat einer Fadenbremse im Schrägriss
Fig. 2
das Bremsaggregat nach Fig. 1 mit einer angeschlossenen Fadensensor- und Fadenwächtereinrichtung sowie einer Fadenbrems-Steuereinrichtung
Further features of the invention result from the description of the method and from exemplary embodiments of the device with reference to the drawing. In this shows
Fig. 1
the brake unit of a thread brake in a diagonal tear
Fig. 2
1 with a connected thread sensor and thread monitor device and a thread brake control device

Beim erfindungsgemässen Verfahren zur Abbremsung eines laufenden Fadens oder fadenartigen Gebildes wird der Faden entlang von Bremselementen geführt, wobei seine normale Fadenlaufbahn von diesen im gelüfteten Zustand der Bremse nicht beeinflusst wird. Beim Abbremsvorgang werden Bremselemente, welche zwei Bremselementgruppen angehören und die entlang der Fadenachse miteinander abwechselndangeordnet sind,gegen den Faden bewegt und der Faden durch diese in eine mäanderförmige Bahn ausgelenkt, wodurch zufolge der Reibung an den Bremselementen der Faden gebremst oder völlig abgebremst wird und zum Stillstand kommt, ohne geklemmt zu werden. Die Bremswirkung wird durch eine Veränderung der Mäanderform der Fadenachse bzw. Fadenbahn und damit die Umschlingung der Bremselemente vorgenommen, wobei dies mit einer Positioniervorrichtung, welche die eine Gruppe der Bremselemente gegenüber der anderen Gruppe der Bremselemente bzw. gegenüber der Normalfadenachse verstellt, erreicht wird. Die Bremswirkung kann auch, ev. zusätzlich zur oben beschriebenen Veränderungsmöglichkeit,durch eine intermittierende Bewegung der einen Bremselementgruppe gegen die andere Bremselementgruppe vorgenommen werden, d.h. die eine Bremselementgruppe führt eine Art vibrierende Bewegung für die Vornahme der Fadenbremsung durch, welche von der Fadenbrems-Steuereinrichtung gesteuert wird. Es ist aber auch möglich, den Abbremsvorgang mit der Fadenüberwachung zu kombinieren und dabei nur die durch ihn definierten Fenster zu überwachen, um Störmeldungen weitgehend auszuschalten. Dabei wird die Fadenwächtereinrichtung nur dann aktiviert, wenn auch die Fadenbremse aktiv ist.In the method according to the invention for braking a running thread or thread-like structure, the thread is guided along braking elements, its normal thread path not being influenced by these when the brake is released. During the braking process, brake elements, which belong to two brake element groups and which are arranged alternately along the thread axis, are moved against the thread and the thread is deflected by this into a meandering path, as a result of which the friction on the brake elements causes the thread to brake or to brake completely and to a standstill comes without being pinched. The braking effect is carried out by changing the meandering shape of the thread axis or thread path and thus the wrapping of the braking elements, this being achieved with a positioning device which adjusts one group of the braking elements with respect to the other group of braking elements or with respect to the normal thread axis. The braking effect can also, possibly in addition to the change option described above, be carried out by an intermittent movement of one brake element group against the other brake element group, i.e. the one brake element group carries out a type of vibrating movement for performing the thread braking, which is controlled by the thread brake control device. However, it is also possible to combine the braking process with the thread monitoring and only monitor the windows defined by it in order to largely switch off fault messages. The thread monitor device is only activated when the thread brake is also active.

Die Fadenbremse weist einen Bremsträger 1 (oder ein Gehäuse) auf, an dem eine schlittenartige Positioniereinrichtung 2 verschiebbar geführt und mittels einer Positionierschraube 14 feststellbar sitzt. Die Positioniereinrichtung 2 trägt einerseits den als ein auslenkbar gelagertes Organ ausgebildeten Bremskörper, welches als Wippe 3 gestaltet ist und andererseits eine Verstelleinrichtung 4 für ein Kraftelement 5. Dieses ist als verschiebbare Brücke 6, welche einen Teil von paarweise zugeordneten Kraftelementmagneten 7 trägt, ausgebildet, wobei der andere Teil der Kraftelementmagnete 7 in der Wippe angeordnet ist und beide Teile durch ihre entgegengesetzte Polung einander abstossen, sich also wirkungsmässig aneinander abstützen. Die Brücke 6 ist mit einer in der Verstelleinrichtung 4 für das Kraftelement sitzenden Brückenverstellschraube 9 gegenüber der Wippe 3 verstellbar. Diese trägt Bremselemente, welche ösenartig ausgebildete Fadenleitorgane 10 sind. Auf der Positioniereinrichtung 2 sind darüberhinaus einerseits für die Wippe 3 zwei als zylindrische Stifte ausgebildete Wippenanschläge 11 geeignet angeordnet, welche mit einem Wippenstift 12 zusammenwirken und andererseits ist ein Bremsblockanschlag 13 vorgesehen, wobei sowohl die Wippenanschläge 11 wie auch der Bremsblockanschlg 13 für beide Organe einen geeigneten Bewegungsbereich in Bezug auf den Faden F in dessen Normallage begrenzen. Auch sind an den senkrecht zur Fadenachse liegenden stirnseitigen Enden der Positioniereinrichtung 2 je ein fest angeordnetes Fadenleitorgan 15, welches ebenfalls ösenartig ausgebildet ist, für eine bessere Fadenführung vorgesehen. Am Bremsträger 1 ist ausserdem ein Bremsblock, welcher die Form eines schwenkbaren Bügels 16 besitzt, angelenkt. An diesem Bügel 16 ist ein Permanentmagnet 17 und an diesem ein die magnetische Kraftwirkung verbesserndes Eisenplättchen 18 montiert. Ausserdem ist am freien Ende des Bügels 16 eine der Anzahl der ösenartigen Fadenleitorgane 10 entsprechende Anzahl Bremskörper, welche als in einem Rahmen 19 sitzende, stabartige Fadenleitorgane 20 des Bremsblockes ausgebildet sind, angeordnet. Die Abstände der stabartigen Fadenleitorgane 20 zueinander sind so gewählt, dass sie entlang der Fadenachse mit den ösenartigen Fadenleitorganen 10 einander abwechselnd liegen.The thread brake has a brake carrier 1 (or a housing), on which a slide-like positioning device 2 is displaceably guided and seated by means of a positioning screw 14. The positioning device 2 carries on the one hand, the brake body, which is designed as a deflectably mounted organ, which is designed as a rocker 3, and, on the other hand, an adjusting device 4 for a force element 5. This is designed as a displaceable bridge 6, which carries a part of force element magnets 7 assigned in pairs, the other part of the Force element magnets 7 is arranged in the rocker and both parts repel each other by their opposite polarity, that is to say they are effectively supported on one another. The bridge 6 can be adjusted with respect to the rocker 3 with a bridge adjustment screw 9 seated in the adjusting device 4 for the force element. This carries braking elements, which are loop-like thread guide elements 10. On the positioning device 2, on the one hand, two rocker stops 11 designed as cylindrical pins are suitable for the rocker 3, which cooperate with a rocker pin 12, and on the other hand, a brake block stop 13 is provided, both the rocker stops 11 and the brake block stop 13 being suitable for both organs Limit the range of movement in relation to the thread F in its normal position. A fixedly arranged thread guide member 15, which is also designed like a loop, is also provided on the front ends of the positioning device 2 perpendicular to the thread axis for better thread guidance. A brake block, which has the shape of a pivotable bracket 16, is also articulated on the brake carrier 1. A permanent magnet 17 and an iron plate 18 which improves the magnetic force effect are mounted on this bracket 16. In addition, a number of brake bodies corresponding to the number of eyelet-like thread guide elements 10, which are designed as rod-like thread guide elements 20 of the brake block seated in a frame 19, is arranged at the free end of the bracket 16. The distances between the rod-like thread guide members 20 are selected so that they are along the thread axis lie alternately with the eyelet-like thread guide organs 10.

Gegenüber dem schwenkbaren Bügel 16 ist am Bremsträger 1 ein erster Elektromagnet 21 befestigt, der mit dem Permanentmagneten 17 ja nach Stromzuführ von der Fadenbrems-Steuereinrichtung 24 und entsprechender Polarisierung abstossend oder anziehend zusammenwirkt. Die Fadenbrems-Steuereinrichtung 24 liegt an einem Projektilsensor 26 und einem Opentrigger 27 der Maschine, welche Maschinensignale liefern, die zur Generierung der Signale für die Fabenbremse erforderlich sind.Compared to the pivotable bracket 16, a first electromagnet 21 is fastened to the brake carrier 1 and, depending on the current supply from the thread brake control device 24 and corresponding polarization, interacts with the permanent magnet 17 to repel or attract it. The thread brake control device 24 is located on a projectile sensor 26 and an open trigger 27 of the machine, which deliver machine signals that are required to generate the signals for the honeycomb brake.

Durch entsprechende Signale des Opentriggers 27 und des Projektilsensors 26 erzeugt die Fadenbremssteuereinrichtung 24 einen Stromimpuls von bestimmter Dauer für den ersten Elektromagneten 21, welcher dadurch so polarisiert wurde, dass er den Permanentmagneten 17 anzieht. Dadurch schwenkt der Bügel 16 mit den stabartigen Fadenleitorganen 20 gegen den Faden F und zwischen die ösenförmigen Fadenleitorgane 10 der Wippe. Der Faden wird gegen die ösenförmigen Fadenleitorgane 10 gedrückt, wodurch diese gegen die Kraft der Kraftelementmagnete 7 gegen die Brücke 6 der Verstelleinrichtung 4 aus ihrer Grundposition geschwenkt wird. Der Faden F schlingt sich mäanderförmig um die Bremselemente von Bügel und Wippe und wird durch die Reibung an ihnen gebremst oder völlig bis zum Stillstand abgebremst. Je nach dem Arbeitsprogramm der Maschineschaltet die Fadenbrems-Steuereinrichtung 24 den Strom für den ersten Elektromagneten 21 ab, wodurch der Faden zufolge der Kraft des Permanentmagneten 17 in geeignetem Mass festgehalten wird. Bei einem anderen Arbeitsprogrammschritt der Maschine legt die Fadenbrems-Steuereinrichtung 24 einen umgekehrt gepolten Stromimpuls geeigneter Grösse an den ersten Elektromagneten 21, wodurch dieser den Permanentmagneten 17 abstösst und so die Fadenbremse gelüftet wird.By means of appropriate signals from the op trigger 27 and the projectile sensor 26, the thread brake control device 24 generates a current pulse of a certain duration for the first electromagnet 21, which was thereby polarized in such a way that it attracts the permanent magnet 17. Characterized the bracket 16 with the rod-like thread guide 20 swings against the thread F and between the eyelet-shaped thread guide 10 of the rocker. The thread is pressed against the eyelet-shaped thread guide 10, whereby it is pivoted out of its basic position against the force of the force element magnets 7 against the bridge 6 of the adjusting device 4. The thread F winds in a meandering shape around the braking elements of the bracket and rocker and is braked by the friction on them or completely braked to a standstill. Depending on the work program of the machine, the thread brake control device 24 switches off the current for the first electromagnet 21, as a result of which the thread is held to a suitable extent as a result of the force of the permanent magnet 17. In another work program step of the machine, the thread brake control device 24 applies a reversely polarized current pulse of a suitable size to the first electromagnet 21, as a result of which the latter repels the permanent magnet 17 and thus releases the thread brake becomes.

Bei einer zweiten Ausführungsform der Fadenbremse kann entweder in einem der Fadenleitorgane 10 bzw. 15 bzw. 20 ein Fadensensor für einen Fadenwächter oder Fadenlaufwächter eingebaut oder angebaut sein, wobei die letzte Variante die kostengünstigste Lösung darstellt und in Fig. 2 gezeigt ist. Dieser Fadensensor 23 ist mit einer Fadenwächtereinrichtung 25 verbunden, welche von der Fadenbrems-Steuereinrichtung 26 angesteuert wird. Diese ist ihrerseits wieder mit den Maschinensensoren Open-Trigger 27 und Projektil-Sensor 26 verbunden.In a second embodiment of the thread brake, a thread sensor for a thread monitor or thread run monitor can either be installed or installed in one of the thread guide members 10 or 15 or 20, the last variant being the cheapest solution and shown in FIG. 2. This thread sensor 23 is connected to a thread monitor device 25 which is controlled by the thread brake control device 26. This in turn is connected to the machine sensors Open Trigger 27 and Projectile Sensor 26.

Die Wirkungsweise der Fadenbremse und der Fadenbrems-Steuereinrichtung ist bei dieser Ausführungsform gleich wie bei der ersten Ausführungsform. Zusätzlich mitgesteuert wird von der Fadenbrems-Steuereinrichtung 24 noch die Fadenwächtereinrichtung in der Weise, dass das Signal des Fadensensors 23 nur bei offener Fadenbremse (Stellung 3) ausgewertet wird; in den beiden anderen Fällen, also bei stromlosem ersten Elektromagneten 21 und bei gegenüber der Offenstellung umgepoltem ersten Elektromagneten 21, wenn also die Fadenbremse geschlossen ist, wird das Signal des Fadensensors 23 nicht ausgewertet. Das Signal des Fadensensors wird also nur in einem von der Maschinensteuerung herleitbaren offenen Bremsfenster ausgewertet.The operation of the thread brake and the thread brake control device in this embodiment is the same as in the first embodiment. The thread brake control device 24 also controls the thread monitor device in such a way that the signal from the thread sensor 23 is only evaluated when the thread brake is open (position 3); in the other two cases, that is to say when the first electromagnet 21 is de-energized and when the first electromagnet 21 is reversed in relation to the open position, that is to say when the thread brake is closed, the signal from the thread sensor 23 is not evaluated. The signal from the thread sensor is therefore only evaluated in an open brake window that can be derived from the machine control.

Diese Variante hat den wesentlichen Vorteil, dass der normalerweise sehr hohe Grundstörpegel zufolge der hohen Drehzahlen der Textilmaschinen und dementsprechend der hohen Schlagzahl der Bremsbetätigungen einerseits durch die neue Wirkungsweise der Fadenbremse, welche nicht schlagartiges Klemmen bewirkt, reduziert und andererseits auf die unumgänglich notwendigen Ueberwachungsphasen in seinem Einfluss beschränkt wird, wobei dennoch die verfahrensmässig ideale Ueberwachungsstelle fürden Fadenlauf, nämlich in unmittelbarer Nachbarschaft der Fadenbremse, erhalten bleibt. Insbesondere werden auch somit Fehlermeldungen vom ruhenden Faden, die i.a. durch den Grundstörpegel ausgelöst werden und die bisher eine häufige Störung darstellten, vermieden, da bei ruhendem Faden ein eventuell auftretendes Fadensensorsignal nicht an die Fadenwächtereinrichtung weitergeleitet wird. Also kein Störungssignal verursachen kann. Dazu besteht die Möglichkeit bei der Variante mit dem Permanentmagneten, den Faden leicht zu halten und das Störsignal des ruhenden Fadens zusätzlich zu verringern.This variant has the significant advantage that the normally very high background noise level due to the high speeds of the textile machines and, accordingly, the high number of strokes of the brake actuation is reduced on the one hand by the new mode of operation of the thread brake, which does not cause sudden jamming, and on the other hand to the absolutely necessary monitoring phases in its Limited influence is maintained, but the procedurally ideal monitoring point for the thread running, namely in the immediate vicinity of the thread brake, is retained. In particular, error messages from the stationary thread, which are generally triggered by the basic disturbance level and which have previously been a frequent disturbance, are thus avoided, since a thread sensor signal that may occur is not passed on to the thread monitor device when the thread is stationary. So no interference signal can cause. With the variant with the permanent magnet, there is also the possibility of holding the thread lightly and additionally reducing the interference signal of the stationary thread.

Ganz besonders vorteilhaft ist diese erfindungsgemässe Anordnung aber bei Mehrfarbenmaschinen. Bei diesen werden die Fadensensoren aller Fäden auf eine Auswerteeinrichtung angeschlossen und bilden gemeinsam das Signal. Dies ist möglich, da ja immer nur einer der Fäden läuft und dieser anders identifizierbar ist. Geben,beispielsweise bei vier Fäden, drei ruhende Fäden gemeinsam ein Ruhegrundstörsignal auf die Auswerteeinrichtung, dann ist dieses drei mal so gross als ein Grundstörsignal eines einzelnen Fadens, womit der Abstand vom Grundstörpegel zum Signalpegel des vierten, laufenden, Fadens so klein werden kann, dass eine Auswertung des Laufsignals nicht mehr möglich oder nur mit sehr wesentlich erhöhtem technichen Aufwand möglich wird. Eine solche Situation tritt insbesondere dann ein, wenn die drei ruhenden Fäden dicke Fäden und der laufende Faden ein dünner Faden ist. Der dünne Faden wird dann nicht mehr wirksam überwacht.However, this arrangement according to the invention is very particularly advantageous in multi-color machines. In these, the thread sensors of all threads are connected to an evaluation device and together form the signal. This is possible because only one of the threads is running and can be identified differently. If, for example in the case of four threads, three resting threads give a resting basic disturbance signal to the evaluation device, then this is three times as large as a basic disturbance signal of an individual thread, with which the distance from the basic disturbance level to the signal level of the fourth, running thread can become so small that an evaluation of the run signal is no longer possible or is only possible with very significantly increased technical effort. Such a situation occurs especially when the three resting threads are thick threads and the running thread is a thin thread. The thin thread is then no longer effectively monitored.

Bei einer weiteren Variante der Fadenbremse kann diese ev. zusätzlich zur kontinuierlichen Bremsung der beiden bisher beschriebenen Varianten von der Fadenbremssteuereinrichtung in bestimmten, arbeitszyklusabhängigen Intervallen mit diskontinuierlichen Stromimpulsen für den ersten Elektromagneten 21 angesteuert werden, wodurch der Bügel 16 und entsprechend die stabförmigen Fadenleitorgane 20 und folglich auch die ösenförmigen Fadenleitorgane 10 hin und her vibrieren, d.h. die Wirkung eines wechselweisen stärkeren oder schwächeren Lüftens bzw. Anziehens der Bremse eintritt. Dadurch kann erreicht werden, dass der Faden praktisch permanent etwas abgebremst wird und somit immer gespannt läuft, beispielsweise bei einer Webmaschine leicht gespannt eingetragen wird. Andererseits kann mit einer solchen Fadenbremse in vordefinierten Intervallen des Arbeitszyklus der Maschine der Faden in voreinstellbarer Stärke gebremst ohne vollständig abgebremst zu werden und in anderen vordefinierten Intervallendes Arbeitszyklus der Maschine vollständig abgebremst werden. Ein solches intervallkonformes Bremsen ist insbesondere bei Greiferwebmaschinen für das Intervall der Fadenübergabe von einem Greifer zum anderen und dem Eintragsendintervall vorteilhaft. Dadurch kann der Faden zwischen diesen Intervallen frei und ungebremst laufen. Dies ist insbesondere bei vielen Fadenmaterialien erwünscht oder nahezu notwendig. Dabei ist mit dieser vorgeschlagenen Einrichtung eine intervallkonforme Bremsung auch bei den heute extrem hohen Fadenlaufgeschwindigkeiten aufgrund der wesentlich höher gewordenen Maschinendrehzahlen möglich. Dies trotz einer Steigerung der Lebensdauer der Fadenbrems-Verschliesselemente.In the case of a further variant of the thread brake, the thread brake control device can, in addition to continuously braking the two variants described so far, at certain, work cycle-dependent intervals with discontinuous ones Current pulses for the first electromagnet 21 are controlled, whereby the bracket 16 and accordingly the rod-shaped thread guide 20 and consequently also the eyelet thread guide 10 vibrate back and forth, ie the effect of alternately stronger or weaker release or application of the brake occurs. In this way it can be achieved that the thread is practically permanently braked somewhat and thus always runs under tension, for example with a weaving machine being inserted with a slight tension. On the other hand, with such a thread brake, the thread can be braked to a pre-set strength at predefined intervals of the working cycle of the machine without being completely braked and in other predefined intervals the working cycle of the machine can be completely braked. Such interval-conform braking is particularly advantageous in rapier weaving machines for the interval of thread transfer from one rapier to another and the entry end interval. This allows the thread run freely and unchecked between these intervals. This is particularly desirable or almost necessary with many thread materials. With this proposed device, interval-compliant braking is possible even at today's extremely high thread speeds due to the much higher machine speeds. This despite an increase in the life of the thread brake closing elements.

Bei einer weiteren Variante der oben beschriebenen Fadenbremse kann statt dem Permanentmagneten 17 ein zweiter Elektromagnet 22 vorgesehen werden, welcher auf dem Bügel 16 montiert wird. Die Wirkung ist entsprechend gleich, nur dass bei stromloser Fadenbremse der Faden nicht selbsttätig gehalten wird. Die Fadenbremse ist a lso nicht selbstbremsend.In a further variant of the thread brake described above, instead of the permanent magnet 17, a second electromagnet 22 can be provided, which is mounted on the bracket 16. The effect is correspondingly the same, only that the thread is not automatically held when the thread brake is de-energized. The thread brake is therefore not self-braking.

Bei wieder einer anderen Variante der Fadenbremse kann das Kraftelement 5 eine Feder sein, welche mit der verstellbaren Brücke 6 und der Wippe 3, welche dann beide keine Kraftelementmagnete 7 aufweisen, zusammenwirkt.In yet another variant of the thread brake, the force element 5 can be a spring which interacts with the adjustable bridge 6 and the rocker 3, which then both have no force element magnets 7.

Bei einer zusätzlichen Variante der Fadenbremse können die ösenartigen Fadenleitorgane 10 des Bremskörpers Fadeneinführöffnungen (nicht dargestellt) aufweisen, sodass der Faden F nicht in Richtung der Fadenachse mit Hilfsmitteln eingezogen, sondern quer zu ihr ohne Hilfsmittel eingelegt werden kann.In an additional variant of the thread brake, the eyelet-like thread guide elements 10 of the brake body can have thread insertion openings (not shown), so that the thread F cannot be drawn in with tools in the direction of the thread axis, but can be inserted transversely to it without tools.

Bei einer weiteren besonderen Variante ist es möglich, die Verstelleinrichtung 4 motorisch während des Abbremsvorganges in Abhängigkeit vom Arbeitszyklus der Maschine durch die Fadenbrems-Steuereinrichtung 24 zu verstellen und so die Bremswirkung noch spezifischer an Material und Manschinendynamik anzupassen.In a further special variant, it is possible to adjust the adjusting device 4 by means of a motor during the braking process as a function of the working cycle of the machine by means of the thread brake control device 24, and thus the braking effect even more specifically in terms of material and machine dynamics adapt.

Die wesentlichsten und bedeutungsvollsten Vorteile dieser Fadenbremsverfahren und Fadenbremsvorrichtungen sind eine ganz wesentlich erhöhte Standzeit auch bei schwierigen, harten und fasrigen Fadenmaterialien, eine wesentlich schonungsvollere und gleichzeitig wirksamere Abbremsung bis zum Fadenstillstand, die Möglichkeit von dosiertem Bremsen ohne den Faden zum Stillstand zu bringen, die Möglichkeit von intervallkonformem Bremsen entsprechend den Arbeitszyklen auch bei höchsten Drehzahlen, die Möglichkeit der Ausschaltung des Grundstörpegels für den Fadenwächter in bestimmten Arbeitsabschnitten und damit Reduzierung der Störungsmeldungen ohne Einbusse der günstigen Fadenwächterposition an der Maschine, der Vermeidungvon grossen Verlusten an Produktionszeit und Produkten bei der Forderung nach langbahnigen, fehlerfreien Chargen usw.The most important and significant advantages of these thread braking methods and thread braking devices are a significantly increased service life even with difficult, hard and fibrous thread materials, a much more gentle and effective braking at the same time until the thread stops, the possibility of metered braking without bringing the thread to a standstill of interval-compliant braking according to the work cycles even at the highest speeds, the possibility of switching off the basic interference level for the thread monitor in certain work sections and thus reducing the error messages without loss of the favorable thread monitor position on the machine, avoiding large losses in production time and products when long-term demands are made , flawless batches etc.

BEZUGSZEICHENREFERENCES

FF
... Faden... thread
11
... Bremsträger... brake carrier
22nd
... Positioniereinrichtung... positioning device
33rd
... Wippe / auslenkbar gelagertes Organ... rocker / deflectable organ
44th
... Verstelleinrichtung für Kraftelement... adjustment device for force element
55
... Kraftelement... force element
66
... Brücke... bridge
77
... Kraftelementmagnete... force element magnets
88th
......
99
... Brückenverstellschraube... bridge adjustment screw
1010th
... ösenartige Fadenleitorgane / Bremselemente Bremskörper... eyelet-like thread guide elements / braking elements
1111
... Anschläge der Wippe... rocker stops
1212
... Wippenstift... rocker pin
1313
... Bremsblockanschlag... brake block stop
1414
... Positionierschraube... positioning screw
1515
... festes Fadenleitorgan / Bremselement... fixed thread guide / braking element
1616
... schwenkbarer Bügel... swivel bracket
1717th
... Permanentmagnet... permanent magnet
1818th
... Eisenplättchen... iron plates
1919th
... Rahmen... Frame
2020th
... stabartige Fadenleitorgane / Bremselemente Bremsblock... rod-like thread guide elements / brake elements brake block
2121
... 1. Elektromagnet... 1. Electromagnet
2222
... 2. Elektromagnet... 2. Electromagnet
2323
... Fadensensor... thread sensor
2424th
... Fadenbrems-Steuereinrichtung... thread brake control device
2525th
... Fadenwächtereinrichtung... thread monitor device
2626
... Projektilsensor... projectile sensor
2727
... Opentrigger... op trigger

Claims (33)

  1. Method for braking a running thread in a textile machine, whereby the braking procedure occurs by means of mutually displaceable braking elements by partially looping the thread through the braking elements, characterized in that in a first phase the braking elements are in an opened position, in which they do not affect the path of the running thread, and in that in a second phase they are displaced to a mutually displaced braking position until the thread is braked to a stop, whereby the switching between the two positions of the braking elements occurs in dependence of the working cycle of the textile machine.
  2. Method of claim 1 in a textile machine with machine control, characterized in that the second, braking phase is only accepted within a braking window defined by the machine control.
  3. Method of one of the preceding claims, whereby the textile machine comprises a projectile sensor and an opening trigger, characterized in that the switching of the braking elements from the first to the second position is triggered by signals from the projectile sensor and the opening trigger.
  4. Method of one of the preceding claims, characterized in that in the second, braking phase the braking elements are displaced from the opened position to their mutually displaced position by a single release.
  5. Method of one of the claims 1 to 3, characterized in that in the second phase the braking elements are intermittently switched between the opened position and the mutually displaced position until the thread is brought to a stop.
  6. Thread brake for performing the method according to claim 1 with a brake support, to which a brake body and a brake block cooperating with the brake body for the braking of the thread are connected, whereby a thread braking control unit controls the movement of the brake block, characterized in that the braking body (2-12, 14, 15) comprises an organ (3) mounted displaceably under a transversal force transferred from the thread (F) against the force of a force element (5) and at least one braking element (10), which in a braking phase is displaceable in cooperation with the braking block to a braking position displaced from the opened position, which braking block (13, 16-20) is driven by a thread braking control unit and also comprises at least one braking element (20), and which braking element of the braking body can be held in the opened position by the force element (5) in a position corresponding at least approximately to the thread axis.
  7. Thread brake of claim 6, characterized in that both the braking element of the braking body (2-12, 14, 15) and the braking element of the braking block (13, 16-20) is formed as at least one thread guiding organ (10, resp. 20) and in the braking position both produce in mutual cooperation at least one thread deflection from the normal thread axis.
  8. Thread brake of claim 7, characterized in that in addition to the thread guiding organs (10) of the braking body and the thread guiding organs (20) of the braking block at least one thread guiding organ (15) fixedly mounted on a displaceable positioning device (2) on the brake support (1) is provided as braking element.
  9. Thread brake of claim 7 or 8, characterized in that at least one thread guiding organ (10) of the braking body is arranged in a row along the thread direction beside at least one thread guiding organ (20) of the braking block.
  10. Thread brake according to claim 9, characterized in that the thread guiding organ (10) of the braking body is shaped at least approximately as a loop.
  11. Thread brake according to claim 9, characterized in that the thread guiding organ (20) of the braking block is shaped at least approximately as a rod.
  12. Thread brake according to one of the claims 7 to 10, characterized in that the thread guiding organ (10) of the braking body is arranged on a pivotal rocker (3).
  13. Thread brake according to one of the claims 8, 9 or 11, characterized in that the thread guiding organ (20) of the braking block sits on a pivotal bar (16).
  14. Thread brake according to claim 12, characterized in that the pivotal rocker (3) is arranged on a positioning device.
  15. Thread brake according to claim 10, characterized in that each thread guiding organ (10) of the braking body comprises a thread guiding opening, which is arranged thus that the inserted thread cannot leave anymore the thread guiding organ (10) by itself.
  16. Thread brake according to claim 14, characterized in that the positioning device (2) comprises the force element (5), and the rocker (3) is on the one hand held in a normal position by the force element (5) and after displacement from this normal position by the thread (F) during braking led back to this normal position, and on the other hand displaceably positioned with respect to the thread axis.
  17. Thread brake according to claim 16, characterized in that the positioning device (2) comprises stops for the pivotal movement of the rocker (3).
  18. Thread brake according to claim 17, characterized in that the stops for the pivotal movement of the rocker (3) are cylindrical pins.
  19. Thread brake according to claim 16, characterized in that the positioning device (2) comprises stops (13) for the pivotal movement of the braking block.
  20. Thread brake according to claim 16, characterized in that the positioning device (2) is a displaceable and securable sled on the brake support (1).
  21. Thread brake according to claim 16 or 20, characterized in that the positioning device (2) comprises an adjusting device (4) for the force element (5) for varying the force acting on the rocker.
  22. Thread brake according to claim 21, characterized in that the adjusting device (4) comprises a bridge (6), which is displaceable in respect to the rocker (3) but securably mounted on the positioning device (2) and adapted for holding the force element (5).
  23. Thread brake according to one of the claims 16, 21 or 22, characterized in that the force element (5) is a spring, which holds the rocker pivotally in its normal position.
  24. Thread brake according to one of the claims 16, 21 or 22, characterized in that the force element (5) comprises at least one pair of force element magnets (7), one of which is arranged on the rocker (3) and one on the bridge (6) of the adjusting device (4), and which attract or repulse the rocker (3) and move it thereby into its normal position against the deflecting force of the thread.
  25. Thread brake according to claim 13, characterized in that the pivotal bar (16) carries a permanent magnet (17) and cooperates with a first controllable electromagnet (21) of the brake support (1).
  26. Thread brake according to claim 13, characterized in that the pivotal bar (16) carries a second controllable electromagnet (22), which cooperates with a first controllable electromagnet (21) of the brake support (1).
  27. Thread brake according to claim 25, characterized in that the permanent magnet (17) is adapted for holding the bar (16) in the braking position.
  28. Thread brake according to one of the claims 25 or 27, characterized in that at least one iron platelet (18) is provided on the permanent magnet (17) for improving the effect of the force.
  29. Thread brake according to one of the claims 6 to 28, characterized in that the braking block (13, 16-20) or the braking body (2-12, 14, 15) or the brake support (1) or the positioning device (2) comprises a thread sensor (23), which is connected to a thread monitor unit and/or the thread braking control unit.
  30. Thread brake according to claim 29, characterized in that the thread braking control unit generates a braking window in the working cycle of the machine in dependence of its running- or control-pulses for at least one thread brake and/or thread monitor unit.
  31. Thread brake according to claim 30, characterized in that during the open braking window the thread brake is actively released or actively attracted and the thread monitor unit is correspondingly active, and during closed braking window the thread brake is in the attracted normal position defined by the permanent magnet and the thread monitoring unit is inactive.
  32. Thread brake according to one of the claims 29 or 30, characterized in that during the braking process the thread braking control unit (24) drives at least one of the thread brakes connected to it with intermittent, short time braking signals for achieving a given braking strength and thereby also the thread tension.
  33. Thread brake according to one of the claims 29 or 30, characterized in that the thread braking control unit (24) drives at least one of the thread brakes connected to it with only one continuous braking signal.
EP88810825A 1988-01-15 1988-12-01 Braking method for a running thread, and thread brake to carry out the method Revoked EP0326784B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH146/88A CH676234A5 (en) 1988-01-15 1988-01-15
CH146/88 1988-01-15

Publications (2)

Publication Number Publication Date
EP0326784A1 EP0326784A1 (en) 1989-08-09
EP0326784B1 true EP0326784B1 (en) 1993-06-16

Family

ID=4180298

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88810825A Revoked EP0326784B1 (en) 1988-01-15 1988-12-01 Braking method for a running thread, and thread brake to carry out the method

Country Status (5)

Country Link
US (1) US4927093A (en)
EP (1) EP0326784B1 (en)
JP (1) JPH01314754A (en)
CH (1) CH676234A5 (en)
DE (1) DE3838162A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH686955A5 (en) * 1992-03-16 1996-08-15 Der Loepfe Ag Geb Yarn braking device.
IT1284077B1 (en) * 1996-06-27 1998-05-08 Roj Electrotex Nuova Srl WIRE BRAKING DEVICE FOR TEXTILE MACHINES
ITTO980207A1 (en) * 1998-03-12 1999-09-12 Lgl Electronics Spa MODULATED BRAKING DEVICE OF WEFT YARN FOR TEXTILE MACHINES
IT1303154B1 (en) * 1998-07-17 2000-10-30 Lgl Electronics Spa MODULATED BRAKING DEVICE OF THE WEFT YARN FOR TEXTILE MACHINES.
DE10009611A1 (en) 2000-02-29 2001-08-30 Schlafhorst & Co W Device for controlling the thread tension of a running thread in an automatic winding device
CN109632816B (en) * 2018-12-26 2021-03-05 石狮市宝翔针织机械有限公司 Yarn fault sensor for knitting robot

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US2732142A (en) * 1956-01-24 Grein
FR545845A (en) * 1922-01-13 1922-10-21 Thread tensioner for winding machines and other machines in the textile industry
US2005975A (en) * 1933-07-24 1935-06-25 Warp Compressing Machine Compa Thread tensioning device
US2202323A (en) * 1938-10-14 1940-05-28 Woodruff T Sullivan Weft tension and loom stopping device
DE893321C (en) * 1949-08-03 1953-10-15 Reiners Walter Dr Ing Claw brake for tensioning a thread
US2615656A (en) * 1949-09-10 1952-10-28 Strake Lambertus Te Yarn brake
US2618445A (en) * 1949-11-09 1952-11-18 Josef Sailer Maschinenfabrik Yarn brake
US2738141A (en) * 1949-12-10 1956-03-13 Deering Milliken Res Corp Compensating device
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US2964259A (en) * 1957-04-29 1960-12-13 Singer Fidelity Inc Yarn tension device
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CH435152A (en) * 1965-06-21 1967-04-30 Steel Heddle Mfg Co Device for tensioning yarn, in particular for winding devices on looms
DE1535144A1 (en) * 1965-09-11 1970-04-09 Elitex Zd Y Textilniho Strojir Thread brake for textile machines, especially winding machines
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FR2300734A1 (en) * 1975-02-13 1976-09-10 Gabet Denimal Tensioning advancing yarn using pneumatic nozzle - through which yarn passes and in which a counter air current flows
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Also Published As

Publication number Publication date
DE3838162A1 (en) 1989-08-03
US4927093A (en) 1990-05-22
CH676234A5 (en) 1990-12-28
EP0326784A1 (en) 1989-08-09
DE3838162C2 (en) 1993-08-12
JPH01314754A (en) 1989-12-19

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