EP1357213B1 - Device and method to regulate the yarn tension in textile machines - Google Patents

Device and method to regulate the yarn tension in textile machines Download PDF

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Publication number
EP1357213B1
EP1357213B1 EP03004706A EP03004706A EP1357213B1 EP 1357213 B1 EP1357213 B1 EP 1357213B1 EP 03004706 A EP03004706 A EP 03004706A EP 03004706 A EP03004706 A EP 03004706A EP 1357213 B1 EP1357213 B1 EP 1357213B1
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EP
European Patent Office
Prior art keywords
thread
force
brake
tension
brake element
Prior art date
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Expired - Lifetime
Application number
EP03004706A
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German (de)
French (fr)
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EP1357213A2 (en
EP1357213A3 (en
Inventor
Wilhelm Herrlein
Manuel Renz
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Lindauer Dornier GmbH
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Lindauer Dornier GmbH
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Publication of EP1357213A3 publication Critical patent/EP1357213A3/en
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • 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
    • B65H59/22—Co-operating surfaces mounted for relative movement and arranged to apply pressure to material
    • B65H59/24—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
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/31—Tensile forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/34—Pressure, e.g. fluid pressure
    • 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 invention relates to a device and a method for controlling the thread tension of a thread in textile processing machines, in particular in weaving machines, according to the preamble of the independent claims.
  • Such devices often referred to as thread brake, are known in various designs and are e.g. used as a weft brake in weaving machines.
  • DE 34 46 567 C1 shows a weft brake with controllable braking effect, which consists of two spring against each other, the weft thread between them receiving lamellar parts. Electromagnetically controllable means are provided which act on at least one of the lamellar parts and thereby exert an adjustable braking force on the thread.
  • a similar embodiment of a weft brake is known from DE 43 06 911 C1.
  • This weft brake is likewise based on a lamellar structure, wherein the position of at least one of the lamellae can be changed by a stepper motor, which acts on the lamella via an actuating element arranged eccentrically on the motor shaft.
  • a variety of other types of thread brakes are known, e.g. with a brake band and a controllable brake body between which the weft thread is guided according to EP 0 475 892 A1, or so-called wrap brakes, in which the braking force is adjustable by changing the wrap angle, described in principle by a thread tensioning device in EP 0 467 059 A1 ,
  • the yarn brake consists essentially of a yarn tension sensor and the actual yarn brake.
  • the thread tension sensor the thread must be deflected for a measurement of the current thread tension or the applied braking force, whereby a force proportional to the thread tension can be transmitted to a corresponding measuring element. Due to the deflection, however, results in an unnecessary mechanical stress of the thread, even if the yarn brake is not working, ie is open.
  • US Pat. No. 5,842,661 A the thread is not deflected, since a force perpendicular to the thread running direction is measured directly on the thread brake. As a result, however, no measurement of the thread tension is possible.
  • the object of the invention is therefore to develop an apparatus and a method for controlling the thread tension of a thread in textile processing machines such that the mechanical stress of the thread is minimized.
  • the yarn brake comprises at least one force transducer mechanically coupled to the brake element for measuring a force F applied to the brake element in the direction of the yarn and proportional to the yarn tension F, and a control device for controlling the yarn tension by varying the braking force B as a function of measured force F.
  • the novel principle of the controlled thread brake is based on the fact that the thread tension is generated by the brake elements and at the same time measured directly on the brake element, so that the braking force of the brake element exerted on the thread can be regulated as a function of the thread tension.
  • the thread tension is simultaneously monitored and regulated.
  • the thread had to be deflected for the voltage measurement.
  • the thread can be passed completely freely through the opened brake.
  • the thread need not be deflected for thread tension measurement and braking, i.
  • the weft thread can be guided absolutely straight through the thread brake.
  • the braking element comprises two opposing and the thread between them receiving force transmission means, wherein acts on at least one of the force transmission means, a controllable actuating element which adjusts the position of at least one of the power transmission means relative to the other.
  • At least one of the power transmission means is mounted linearly movable in the direction of the thread and acts on the force transducer, which is preferably designed as a piezoelectric force transducer.
  • the actuator may be a piezoelectric actuator that allows very fast positioning movements.
  • Figure 1 shows schematically a yarn brake 1, as it can be used for example for braking a weft thread in a loom.
  • the Faden.2 is guided in the direction 3 by the yarn brake.
  • the braking force B is generated by two actuating elements 8, 9 and introduced into the yarn 2 via two brake sheets 4, 5 receiving the yarn 2 between them.
  • the brake plates 4, 5 are opposite each other and are preferably resilient, wherein they are mounted in corresponding bearings 6, 7. When the thread brake is open, the thread 2 runs unhindered, without contact with the brake plates 4, 5 and without deflection through the thread brake through.
  • a thread tension F is generated in the thread, which generates in the brake plates 4, 5 each acting in the running direction 3 of the thread counterforce of F / 2.
  • the brake plates 4, 5 are movably mounted in the direction 3 of the thread 2 and mechanically coupled with stationary force sensors 10, 11.
  • the respective force F / 2 acting on the brake plates 4, 5 is proportional to the thread tension force F and is measured by the load cells 10, 11 and fed to a control device.
  • the measured force F is independent of the thread diameter and the friction coefficient of the thread 2 and the brake elements. However, it is directly proportional to the force exerted on the thread braking force B, and thus proportional to the thread tension.
  • the control device 12 regulates the thread tension by changing the braking force B of the actuating elements 8, 9 as a function of the measured force F such that a desired thread tension is set in the thread 2.
  • Figure 2 shows an embodiment of a yarn brake 1 with a passive brake plate 13 with adjustable bias, which is accommodated in a stationary bearing 13.
  • the applied by an actuator 15 braking force B is transmitted to a brake plate 16 which bears against the brake plate 13, wherein the thread 2 between the brake plate 13 and the brake plate 16 is guided therethrough.
  • the thread tensioning force F generated in the thread is equally transmitted to the brake plate 13 and the brake plate 16 and generates here in each case a counterforce F / 2 measured by a mechanically coupled to the brake plate 16 force transducer 17 and a control device 18 is supplied.
  • the control device 18 regulates the thread tension by changing the braking force B of the actuating element 15 as a function of the measured force F such that a desired thread tension is set in the thread 2.

Abstract

A thread tension regulator comprises a force pickup transducer that is mechanically coupled to a first thread brake of a thread brake arrangement to receive from the first thread brake a reaction force that is oriented parallel to the thread and that is exerted by the thread onto the first brake. The force pickup transducer has a signal output adapted to provide a measurement signal representing a measurement of the reaction force. A thread tension regulator comprises a thread brake arrangement (1) including a control signal input and a first thread brake (4) arranged to adjustably press against the thread to apply an adjustable braking force (B) onto the thread; a force pickup transducer (10, 11) that is mechanically coupled to the first thread to receive from the first thread a reaction force that is oriented parallel to the thread and that is exerted by the thread onto the first brake, wherein the force pickup transducer has a signal output adapted to provide a measurement signal representing a measurement of the reaction force; and a thread tension regulating arrangement that includes a measurement signal input connected to the signal output of the force pickup transducer and a control signal output connected to the control signal input of the thread brake arrangement and that is adapted to provide at the control signal output a control signal dependent on and responsive to the measurement signal received at the measurement signal input. The thread brake arrangement adjusts the thread brake in response to the control signal to adjust the braking force dependent on the reaction force.

Description

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Regelung der Fadenspannung eines Fadens bei Textilverarbeitungsmaschinen, insbesondere bei Webmaschinen, gemäß dem Oberbegriff der unabhängigen Patentansprüche.The invention relates to a device and a method for controlling the thread tension of a thread in textile processing machines, in particular in weaving machines, according to the preamble of the independent claims.

Derartige, oft auch als Fadenbremse bezeichnete Vorrichtungen, sind in vielfältigen Ausführungen bekannt und werden z.B. als Schussfadenbremse in Webmaschinen eingesetzt.Such devices, often referred to as thread brake, are known in various designs and are e.g. used as a weft brake in weaving machines.

Die DE 34 46 567 C1 zeigt eine Schussfadenbremse mit steuerbarer Bremswirkung, die aus zwei federnd gegeneinander liegenden, den Schussfaden zwischen sich aufnehmenden lamellenartigen Teilen besteht. Es sind elektromagnetisch steuerbare Mittel vorgesehen, die auf mindestens eines der lamellenartigen Teile einwirken und dadurch eine einstellbare Bremskraft auf den Faden ausüben.DE 34 46 567 C1 shows a weft brake with controllable braking effect, which consists of two spring against each other, the weft thread between them receiving lamellar parts. Electromagnetically controllable means are provided which act on at least one of the lamellar parts and thereby exert an adjustable braking force on the thread.

Eine ähnliche Ausführung einer Schussfadenbremse ist aus der DE 43 06 911 C1 vorbekannt. Dieser Schussfadenbremse liegt ebenfalls ein lamellenartiger Aufbau zugrunde, wobei die Lage mindestens einer der Lamellen durch einen Schrittmotor veränderbar ist, der über ein exzentrisch auf der Motorwelle angeordnetes Stellelement auf die Lamelle einwirkt.A similar embodiment of a weft brake is known from DE 43 06 911 C1. This weft brake is likewise based on a lamellar structure, wherein the position of at least one of the lamellae can be changed by a stepper motor, which acts on the lamella via an actuating element arranged eccentrically on the motor shaft.

Es sind eine Vielzahl anderer Arten von Fadenbremsen bekannt, z.B. mit einem Bremsband und einem steuerbaren Bremskörper, zwischen welchen der Schussfaden geführt wird gemäß EP 0 475 892 A1, oder sogenannte Umschlingungsbremsen, bei denen die Bremskraft durch Änderung des Umschlingungswinkels einstellbar ist, vom Grundprinzip her anhand einer Fadenspannvorrichtung in der EP 0 467 059 A1 beschrieben.A variety of other types of thread brakes are known, e.g. with a brake band and a controllable brake body between which the weft thread is guided according to EP 0 475 892 A1, or so-called wrap brakes, in which the braking force is adjustable by changing the wrap angle, described in principle by a thread tensioning device in EP 0 467 059 A1 ,

Bei allen bekannten Lösungen besteht die Fadenbremse im wesentlichen aus einem Fadenspannungssensor und der eigentlichen Fadenbremse. Am Fadenspannungssensor muss der Faden für eine Messung der aktuellen Fadenspannung bzw. der anliegenden Bremskraft umgelenkt werden, wodurch eine der Fadenspannung proportionale Kraft auf ein entsprechendes Messelement übertragen werden kann. Durch die Umlenkung ergibt sich aber eine unnötige mechanische Beanspruchung des Fadens, auch dann, wenn die Fadenbremse nicht arbeitet, d.h. geöffnet ist. In der US 5 842 661 A wird der Faden zwar nicht umgelenkt, da eine zur Fadenlaufrichtung senkrechte Kraft direkt an der Fadenbremse gemessen wird. Hierdurch ist aber keine Messung der Fadenspannung möglich.In all known solutions, the yarn brake consists essentially of a yarn tension sensor and the actual yarn brake. At the thread tension sensor the thread must be deflected for a measurement of the current thread tension or the applied braking force, whereby a force proportional to the thread tension can be transmitted to a corresponding measuring element. Due to the deflection, however, results in an unnecessary mechanical stress of the thread, even if the yarn brake is not working, ie is open. Although in US Pat. No. 5,842,661 A, the thread is not deflected, since a force perpendicular to the thread running direction is measured directly on the thread brake. As a result, however, no measurement of the thread tension is possible.

Die Aufgabe der Erfindung ist es daher, eine Vorrichtung und ein Verfahren zur Regelung der Fadenspannung eines Fadens bei Textilverarbeitungsmaschinen derart weiterzubilden, dass die mechanische Beanspruchung des Fadens minimiert wird.The object of the invention is therefore to develop an apparatus and a method for controlling the thread tension of a thread in textile processing machines such that the mechanical stress of the thread is minimized.

Die Aufgabe wird erfindungsgemäß durch die Merkmale der unabhängigen Patentansprüche gelöst.The object is achieved by the features of the independent claims.

Danach umfasst die Fadenbremse erfindungsgemäß mindestens einen mit dem Bremselement mechanisch gekoppelten Kraftaufnehmer zur Messung einer vom Faden auf das Bremselement ausgeübten, in Laufrichtung des Fadens gerichteten und zur Fadenspannung proportionalen Kraft F, und eine Regelungseinrichtung zur Regelung der Fadenspannung durch Verändern der Bremskraft B in Abhängigkeit der gemessenen Kraft F.According to the invention, the yarn brake comprises at least one force transducer mechanically coupled to the brake element for measuring a force F applied to the brake element in the direction of the yarn and proportional to the yarn tension F, and a control device for controlling the yarn tension by varying the braking force B as a function of measured force F.

Das neuartige Prinzip der gesteuerten Fadenbremse beruht darauf, dass die Fadenspannung durch das Bremselemente erzeugt und gleichzeitig direkt am Bremselement gemessen wird, so dass die auf den Faden ausgeübte Bremskraft des Bremselements in Abhängigkeit der Fadenspannung geregelt werden kann.The novel principle of the controlled thread brake is based on the fact that the thread tension is generated by the brake elements and at the same time measured directly on the brake element, so that the braking force of the brake element exerted on the thread can be regulated as a function of the thread tension.

Die Fadenspannung wird gleichzeitig überwacht und geregelt. Bei bisherigen Lösungen musste der Faden für die Spannungsmessung umgelenkt werden. Bei der vorliegenden, neuartigen Lösung kann der Faden vollkommen frei durch die geöffnete Bremse hindurchgeführt werden. Der Faden muss für die Fadenspannungsmessung und Bremsung nicht umgelenkt werden, d.h. der Schussfaden kann absolut geradlinig durch die Fadenbremse geführt werden.The thread tension is simultaneously monitored and regulated. In previous solutions, the thread had to be deflected for the voltage measurement. In the present, novel solution, the thread can be passed completely freely through the opened brake. The thread need not be deflected for thread tension measurement and braking, i. The weft thread can be guided absolutely straight through the thread brake.

Gemäß einer bevorzugten Ausgestaltung der Erfindung umfasst das Bremselement zwei sich gegenüberliegende und den Faden zwischen sich aufnehmende Kraftübertragungsmittel, wobei auf wenigstens eines der Kraftübertragungsmittel ein steuerbares Betätigungselement einwirkt, das die Lage wenigstens eines der Kraftübertragungsmittel gegenüber dem anderen verstellt.According to a preferred embodiment of the invention, the braking element comprises two opposing and the thread between them receiving force transmission means, wherein acts on at least one of the force transmission means, a controllable actuating element which adjusts the position of at least one of the power transmission means relative to the other.

Mindestens eines der Kraftübertragungsmittel ist in Laufrichtung des Fadens linear beweglich gelagert und wirkt auf den Kraftaufnehmer, der vorzugsweise als piezoelektrischer Kraftaufnehmer ausgebildet ist.At least one of the power transmission means is mounted linearly movable in the direction of the thread and acts on the force transducer, which is preferably designed as a piezoelectric force transducer.

Gleichermaßen kann das Betätigungselement ein piezoelektrisches Stellelement sein, das sehr schnelle Stellbewegungen erlaubt.Similarly, the actuator may be a piezoelectric actuator that allows very fast positioning movements.

Die Erfindung wird nachfolgend anhand von zwei Ausführungsbeispielen näher beschrieben.
Es zeigen:

Figur 1:
eine vereinfachte Darstellung einer ersten Ausführungsform der geregelten Fadenbremse;
Figur 2:
eine vereinfachte Darstellung einer zweiten Ausführungsform der geregelten Fadenbremse.
The invention will be described in more detail below with reference to two exemplary embodiments.
Show it:
FIG. 1:
a simplified representation of a first embodiment of the controlled thread brake;
FIG. 2:
a simplified representation of a second embodiment of the controlled thread brake.

Figur 1 zeigt schematisch eine Fadenbremse 1, wie sie z.B. zum Abbremsen eines Schussfadens in einer Webmaschine verwendet werden kann. Der Faden.2 wird in Laufrichtung 3 durch die Fadenbremse geführt. Die Bremskraft B wird von zwei Betätigungselementen 8, 9 erzeugt und über zwei den Faden 2 zwischen sich aufnehmende Bremsbleche 4, 5 in den Faden 2 eingeleitet. Die Bremsbleche 4, 5 liegen sich gegenüber und sind vorzugsweise federelastisch ausgebildet, wobei sie in entsprechenden Lagerungen 6, 7, gelagert sind.
Bei geöffneter Fadenbremse läuft der Faden 2 ungehindert, ohne Kontakt zu den Bremsblechen 4, 5 und ohne Umlenkung durch die Fadenbremse hindurch.Figure 1 shows schematically a yarn brake 1, as it can be used for example for braking a weft thread in a loom. The Faden.2 is guided in the direction 3 by the yarn brake. The braking force B is generated by two actuating elements 8, 9 and introduced into the yarn 2 via two brake sheets 4, 5 receiving the yarn 2 between them. The brake plates 4, 5 are opposite each other and are preferably resilient, wherein they are mounted in corresponding bearings 6, 7.
When the thread brake is open, the thread 2 runs unhindered, without contact with the brake plates 4, 5 and without deflection through the thread brake through.

Durch Aufbringen einer Bremskraft B auf den Faden 2 wird eine Fadenspannungskraft F im Faden erzeugt, welche in den Bremsblechen 4, 5 jeweils eine in Laufrichtung 3 des Fadens wirkende Gegenkraft von F/2 erzeugt. Die Bremsbleche 4, 5 sind in Laufrichtung 3 des Fadens 2 beweglich gelagert und mechanisch mit ortsfesten Kraftaufnehmern 10, 11 gekoppelt. Die jeweils auf die Bremsbleche 4, 5 wirkende Gegenkraft F/2 ist proportional zur Fadenspannungskraft F und wird von den Kraftaufnehmern 10, 11 gemessen und einer Regelungseinrichtung zugeführt.By applying a braking force B on the thread 2, a thread tension F is generated in the thread, which generates in the brake plates 4, 5 each acting in the running direction 3 of the thread counterforce of F / 2. The brake plates 4, 5 are movably mounted in the direction 3 of the thread 2 and mechanically coupled with stationary force sensors 10, 11. The respective force F / 2 acting on the brake plates 4, 5 is proportional to the thread tension force F and is measured by the load cells 10, 11 and fed to a control device.

Die gemessene Kraft F ist unabhängig vom Fadendurchmesser und dem Reibbeiwert des Fadens 2 und der Bremselemente. Sie ist jedoch direkt proportional zu der auf den Faden ausgeübten Bremskraft B, und somit proportional zur Fadenspannung.The measured force F is independent of the thread diameter and the friction coefficient of the thread 2 and the brake elements. However, it is directly proportional to the force exerted on the thread braking force B, and thus proportional to the thread tension.

Die Regelungseinrichtung 12 regelt die Fadenspannung durch Verändern der Bremskraft B der Betätigungselemente 8, 9 in Abhängigkeit der gemessenen Kraft F derart, dass sich eine gewünschte Fadenspannung im Faden 2 einstellt.The control device 12 regulates the thread tension by changing the braking force B of the actuating elements 8, 9 as a function of the measured force F such that a desired thread tension is set in the thread 2.

Figur 2 zeigt eine Ausgestaltung einer Fadenbremse 1 mit einem passiven Bremsblech 13 mit einstellbarer Vorspannung, das in einer ortsfesten Lagerung 13 aufgenommen ist.
Die von einem Betätigungselement 15 aufgebrachte Bremskraft B wird auf eine Bremsplatte 16 übertragen, die am Bremsblech 13 anliegt, wobei der Faden 2 zwischen Bremsblech 13 und Bremsplatte 16 hindurch geführt ist.
Die im Faden erzeugte Fadenspannungskraft F überträgt sich gleichermaßen auf das Bremsblech 13 und die Bremsplatte 16 und erzeugt hier jeweils eine Gegenkraft F/2 die von einem mit der Bremsplatte 16 mechanisch gekoppelten Kraftaufnehmer 17 gemessen und einer Regelungseinrichtung 18 zugeführt wird.Figure 2 shows an embodiment of a yarn brake 1 with a passive brake plate 13 with adjustable bias, which is accommodated in a stationary bearing 13.
The applied by an actuator 15 braking force B is transmitted to a brake plate 16 which bears against the brake plate 13, wherein the thread 2 between the brake plate 13 and the brake plate 16 is guided therethrough.
The thread tensioning force F generated in the thread is equally transmitted to the brake plate 13 and the brake plate 16 and generates here in each case a counterforce F / 2 measured by a mechanically coupled to the brake plate 16 force transducer 17 and a control device 18 is supplied.

Die Regelungseinrichtung 18 regelt die Fadenspannung durch Verändern der Bremskraft B des Betätigungselementes 15 in Abhängigkeit der gemessenen Kraft F derart, dass sich eine gewünschte Fadenspannung im Faden 2 einstellt.The control device 18 regulates the thread tension by changing the braking force B of the actuating element 15 as a function of the measured force F such that a desired thread tension is set in the thread 2.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Fadenbremsethread brake
22
Fadenthread
33
Laufrichtungdirection
44
BremsblechBremsblech
55
BremsblechBremsblech
66
Lagerungstorage
77
Lagerungstorage
88th
Betätigungselementactuator
99
Betätigungselementactuator
1010
KraftaufnehmerLoad cell
1111
KraftaufnehmerLoad cell
1212
Regelungseinrichtungcontrol device
1313
BremsblechBremsblech
1414
Lagerungstorage
1515
Betätigungselementactuator
1616
Bremsplattebrake plate
1717
KraftaufnehmerLoad cell
1818
Regelungseinrichtungcontrol device

Claims (7)

  1. Apparatus for regulating the thread tension of a thread in a textile-processing machine, having at least one brake element acting on the thread for exerting an adjustable braking force B on the thread, characterised by
    at least one force transducer (10; 11; 17) mechanically coupled to the brake element for measuring a force F oriented in the running direction (3) of the thread and proportional to the thread tension and acting via the thread (2) on the brake element,
    and a regulating arrangement (12) for regulating the thread tension by changing the braking force B in dependence on the measured force F, the thread being guided in a straight line through the apparatus.
  2. Apparatus according to claim 1, characterised in that the brake element comprises two oppositely arranged force-transmitting means (4, 5; 13, 16) receiving the thread between them, a controllable actuating element (8; 9; 15) acting on at least one of the force-transmitting means (4; 15; 16) and adjusting the position of at least one of the force-transmitting means relative to the other.
  3. Apparatus according to claim 1 or 2, characterised in that at least one of the force-transmitting means (4; 5; 16) is mounted so as to be movable in the running direction (3) of the thread (2).
  4. Apparatus according to any one of claims 1 to 3, characterised in that the force transducer (10; 11; 17) is a piezoelectric force transducer.
  5. Apparatus according to any one of claims 1 to 4, characterised in that the actuating element (8; 9; 15) is a piezoelectric actuator.
  6. Method for regulating the thread tension of a thread in a textile-processing machine, in which a braking force B is exerted on the thread by means of a brake element acting on the thread, characterised in that a force F oriented in the running direction (3) of the thread and proportional to the thread tension and acting via the thread (2) on the brake element is measured by means of a force transducer (10; 11; 17), and the thread tension is regulated by changing the braking force B in dependence on the measured force F, wherein the thread is not deflected for the thread tension measurement and braking.
  7. Method according to claim 6, characterised in that when the brake element is open, the thread (2) is guided unhindered without being touched and without being deflected by the brake element.
EP03004706A 2002-04-23 2003-03-04 Device and method to regulate the yarn tension in textile machines Expired - Lifetime EP1357213B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10218059A DE10218059A1 (en) 2002-04-23 2002-04-23 Device and method for regulating the thread tension of a thread in textile processing machines
DE10218059 2002-04-23

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EP1357213A2 EP1357213A2 (en) 2003-10-29
EP1357213A3 EP1357213A3 (en) 2004-02-11
EP1357213B1 true EP1357213B1 (en) 2006-10-18

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US (1) US7077168B2 (en)
EP (1) EP1357213B1 (en)
JP (1) JP3977276B2 (en)
AT (1) ATE343008T1 (en)
DE (2) DE10218059A1 (en)

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EP1961686B1 (en) * 2007-02-20 2016-09-14 Iro Ab Yarn tension monitoring and setting system
US8960596B2 (en) 2007-08-20 2015-02-24 Kevin Kremeyer Energy-deposition systems, equipment and method for modifying and controlling shock waves and supersonic flow
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EP1357213A2 (en) 2003-10-29
DE50305395D1 (en) 2006-11-30
JP2003313750A (en) 2003-11-06
ATE343008T1 (en) 2006-11-15
DE10218059A1 (en) 2003-11-13
JP3977276B2 (en) 2007-09-19
EP1357213A3 (en) 2004-02-11
US7077168B2 (en) 2006-07-18
US20030196718A1 (en) 2003-10-23

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