EP1218275B1 - Yarn braking device - Google Patents

Yarn braking device Download PDF

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Publication number
EP1218275B1
EP1218275B1 EP98967145A EP98967145A EP1218275B1 EP 1218275 B1 EP1218275 B1 EP 1218275B1 EP 98967145 A EP98967145 A EP 98967145A EP 98967145 A EP98967145 A EP 98967145A EP 1218275 B1 EP1218275 B1 EP 1218275B1
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EP
European Patent Office
Prior art keywords
brake
brake according
braking element
disc
braking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98967145A
Other languages
German (de)
French (fr)
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EP1218275A1 (en
Inventor
Eugenio Valsecchi
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.)
Iro Patent AG
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Iro Patent AG
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Publication date
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Publication of EP1218275A1 publication Critical patent/EP1218275A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • 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
    • B65H59/225—Tension discs
    • 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 invention relates to a brake for running yarns, with a first brake element and a second movable thereto braking element, which acts force-modulated magnetkraftbetätigt the continuous thread between the brake elements.
  • the second brake element is pressed exclusively by magnetic force on the thread.
  • the braking effect is based solely on the fact that the armature is attracted by the energized electromagnet, wherein the armature is coupled to the second brake element.
  • the air gap between the armature and the core of the electromagnet is adjustable. The current for the electromagnet can be varied.
  • the bearing force of the second brake element is generated exclusively by spring force.
  • An incorporated in the brake electromagnet is used exclusively for transmitting the rotational movement from the first brake element to the second brake element.
  • the object of the invention is the object of specifying a generic brake of particularly fast-responding structure.
  • a brake of the type in question is created by increased use value.
  • the movable brake member so the second brake element is stationary. Only the contact force in the direction of the first brake element varies. This means that no moving masses and thus inertia delays are present, which leads to an extremely responsive design of the yarn brake. Then arises from this fact a lesser wear and thus longer life of the yarn braking device.
  • the idea according to the invention can advantageously be applied to a disk brake. This means that its braking elements represent plates between which the current thread is pulled. Thus, the thread is not constantly running in the same lane and thereby could cause cuts in the plates, the trained by the first brake member first plate is rotationally driven.
  • the procedure is such that the first brake element consists of a magnetic-permeable material and is arranged in front of an electromagnet.
  • the force field can thus enforce the first brake element and is effective on the second movable braking element.
  • the magnetic force is transmitted via a core formed by the drive shaft of the first plate.
  • the force field of the magnet is thus optimally effective on the second brake element.
  • a basic adjustment of the braking force, independent of the contact force caused by the electromagnet, results from the fact that a threaded rod extending in extension of the drive shaft carries an adjusting nut for the pretensioning compression spring.
  • the bias is therefore adjustable to the processed thread texture as well as thread pulling speed.
  • a further advantageous feature is to be seen to provide two juxtaposed, rotationally driven plate brakes, of which at least one is free to be modulated motion by magnetic force. If a knotted point of the thread passes through the thread brake device, one of the two plate brakes always remains in the brake contact position with respect to the thread, optimizing the passage of the thread. It should then be emphasized that one of the two plate brake drive shafts is the extension of the drive shaft of an electric drive and the drive shaft of the other plate brake is driven via an intermediate gear in synchronism with a disk brake.
  • the direction of rotation of the plates of this plate brakes is therefore the same. Also, the co-operating with the intermediate wheels of the drive shafts have the same diameter, so that the first plate of these two plate brakes rotate at the same speed.
  • the modulation of the magnetic force can be controlled by the weaving machine.
  • the release and brake signal occurs depending on the weft insertion and can be implemented in the short term due to the operation of the yarn braking device according to the invention, which contributes to the optimization of the fabric to be produced itself.
  • the modulation can preferably be effected by current surges, controlled by the main shaft of the weaving machine. It is possible to brake with variable force. Then it is provided that the rotary drive of the brake automatically in the absence of power surges exposes.
  • the core or the second plate consist of rapidly demagnetizing material connected to an optimal utilization of the magnetic force field.
  • the numeral 1 denotes a yarn braking device as a whole. It has a box-shaped housing 2, which is closed by a cover 3.
  • the elongated in plan view, rectangular shaped housing 2 has two longitudinally successively arranged plate brakes 4, 5.
  • the first disk brake 4 is equipped with an electric drive 6, which is composed of an electric motor M and a downstream transmission G. Both the electric motor M and the gear G are located in the interior of the housing 2 such that the gear G is screwed to the underside of the lid 3.
  • the trained as an extension of the transmission drive shaft drive shaft 7 passes through the lid 3 and rotatably carries a connected with her, front-toothed drive 8. Furthermore, the drive shaft 7, the drive wheel 8 downstream, a Slewing ring 9 with a provided on its free end face friction lining 10, against which the inner bottom surface of a first plate 11 occurs. On the outer bottom surface of this first plate 11, the outer bottom surface of a second plate 12 is supported, which plates 11, 12 leave a wedge-shaped gap between them.
  • a threaded rod 13 is screwed.
  • This carries at its free end an adjusting nut 14, which acts with the interposition of a displaceable on the threaded rod 13 sleeve 15 on a biasing compression spring 16.
  • the other end acts on the bottom of a cup-shaped sleeve 17, which in turn acts on a pressure collar 18 in the direction of the second plate 12 and thus the second plate 12 in the direction of the first plate 11.
  • the adjusting nut 14, the cup-shaped sleeve 17 and the pressure collar 18 form a telescopic housing in which the running after a truncated cone biasing spring 16 rests protected against dust.
  • the arrangement of the compression spring 16 is such that the larger diameter thread is supported at the bottom of the pot-shaped sleeve 17.
  • the plates 11, 12 is preceded by a thread roller 19 whose axis extends transversely to the longitudinal extent of the housing 2 and thus transversely to the thread passage direction.
  • the cover 3 carries a thread eyelet 20 for the passage of the thread F.
  • the disk brake 5 is inside the housing associated with an electromagnet 21, which is also supported by the cover 3.
  • the winding support 22 is centrally penetrated by a core forming a drive shaft 23, which parallel to the drive shaft 7 of the Plate brake 4 runs.
  • the drive shaft 23 carries a plastic gear 24.
  • This and the drive wheel 8 mesh with an intermediate 25, which is rotatable about an axis 26 arranged in the cover 3. Since both wheels 8, 24 have the same diameter, the drive shafts 7, 23 run synchronously.
  • first brake element 28 which is also formed as a first plate and in its shape and arrangement of the first plate 11 of the disk brake 4th equivalent.
  • first brake element 28 first plate is rotationally driven.
  • magnetically permeable material is selected.
  • the embodiment is brass.
  • In extension of the drive shaft 23 also extends a threaded rod 29. It also carries an adjusting nut 30 which acts via a sleeve 31 on a biasing compression spring 32.
  • biasing compression spring 32 in a housing, including a cup-shaped sleeve 33 and a pressure collar 34 are provided.
  • the encapsulation of the disk brake 5 corresponds to that of the disk brake 4, so that will not be discussed further.
  • the pressure collar 34 acts on the second, movable to the first brake element 28 brake element 35, which is plate-shaped and the second plate 12 of the disk brake 4 corresponds.
  • the disk brake 5 can be modulated by magnetic force.
  • the magnetic force is transmitted to the plate-like second brake element 35 via the drive shaft 23 forming the core.
  • Both the core drive shaft 23- and the second plate, second brake element 35 consist of fast demagnetizing material.
  • the disk brake 5 is assigned a thread roller 38 and a thread eye 39.
  • the disk brake 5 acts in such a way that in time with the operation of the weaving machine, only the bearing force of the second brake element 35, which is spring-biased in the direction of the first brake element 28, can be modulated onto the thread F.
  • the corresponding modulation takes place by current / voltage surges and is controlled by the main shaft of the loom.
  • the rotary drive of the thread braking device is turned on.
  • a suspension of the rotary drive of the yarn braking device takes place automatically in the absence of current / surges.
  • the rotary drive ensures that the brake elements receive a uniform wear and dig no traces as in the prior art. Furthermore, pollution is largely counteracted.
  • Each disk brake 4, 5 is equipped with a sealing collar 40 or 41 located below the first plate 11, 28, in order to protect the interior of the housing 2 against dusting or contamination.

Landscapes

  • Braking Arrangements (AREA)
  • Transmission Devices (AREA)
  • Braking Systems And Boosters (AREA)
  • Looms (AREA)

Abstract

A yarn tensioning device for running threads, comprising a first tensioning element (28) and a second tensioning element (35) which can move in relation thereto, is actuated by magnetic force and acts upon the thread which passes in between the tensioning elements (28, 35) with a force which can be modulated. In said tensioning device, only the load pressure of the second element (35) which is prestressed in the direction of the first element (28) is modulated on the yarn (F).

Description

Die Erfindung betrifft eine Bremse für laufende Fäden, mit einem ersten Bremselement und einem zweiten dazu bewegbaren Bremselement, welches magnetkraftbetätigt den zwischen den Bremselementen durchgezogenen Faden kraftmodulierbar beaufschlagt.The invention relates to a brake for running yarns, with a first brake element and a second movable thereto braking element, which acts force-modulated magnetkraftbetätigt the continuous thread between the brake elements.

Bei einer gattungsgemäßen Bremse ( EP-A-756 028 ) wird das zweite Bremselement ausschließlich durch Magnetkraft auf den Faden aufgedrückt. Die Bremswirkung beruht ausschließlich darauf, dass der Anker vom erregten Elektromagneten angezogen wird, wobei der Anker mit dem zweiten Bremselement gekoppelt ist. Der Luftspalt zwischen dem Anker und dem Kern des Elektromagneten ist einstellbar. Der Strom für den Elektromagneten kann variiert werden.In a generic brake ( EP-A-756 028 ), the second brake element is pressed exclusively by magnetic force on the thread. The braking effect is based solely on the fact that the armature is attracted by the energized electromagnet, wherein the armature is coupled to the second brake element. The air gap between the armature and the core of the electromagnet is adjustable. The current for the electromagnet can be varied.

Bei einer aus EP-A-0 531 752 bekannten drehangetriebenen Scheibenbremse für einen laufenden Faden wird die Auflagekraft des zweiten Bremselementes ausschließlich durch Federkraft erzeugt. Ein in die Bremse eingegliederter Elektromagnet dient ausschließlich zum Übertragen der Drehbewegung vom ersten Bremselement auf das zweite Bremselement.At one off EP-A-0 531 752 known rotationally driven disc brake for a running thread, the bearing force of the second brake element is generated exclusively by spring force. An incorporated in the brake electromagnet is used exclusively for transmitting the rotational movement from the first brake element to the second brake element.

Bei einer aus US-A-5 238 202 bekannten Tellerbremse wird der Bremseffekt in Abhängigkeit von der stromab der Bremse gemessenen Fadenspannung und ausschließlich magnetisch geregelt.At one off US-A-5,238,202 disc brake known the braking effect in response to the measured downstream of the brake thread tension and only magnetically controlled.

Dem Gegenstand der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Bremse von besonders schnell ansprechendem Aufbau anzugeben.The object of the invention is the object of specifying a generic brake of particularly fast-responding structure.

Diese Aufgabe wird mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved with the features of claim 1.

Die Unteransprüche betreffen vorteilhafte Weiterbildungen der erfindungsgemäßen Lösung.The subclaims relate to advantageous developments of the solution according to the invention.

Zufolge derartiger Ausgestaltung ist eine Bremse der in Rede stehenden Art von erhöhtem Gebrauchswert geschaffen. Während der Modulation der Auflagekraft ist das bewegliche Bremsteil, also das zweite Bremselement, unbewegt. Lediglich die Auflagekraft in Richtung des ersten Bremselementes variiert. Das bedeutet, daß keine bewegten Massen und damit Trägheitsverzögerungen vorhanden sind, was zu einer äußerst schnell ansprechenden Ausgestaltung der Fadenbremse führt. Sodann ergibt sich aus diesem Sachverhalt ein geringerer Verschleiß und damit höhere Lebensdauer der Fadenbremsvorrichtung. Der erfindungsgemäße Gedanke ist mit Vorteil auf eine Tellerbremse übertragbar. Das bedeutet, daß dessen Bremselemente Teller darstellen, zwischen denen der laufende Faden hindurchgezogen wird. Damit der Faden nicht ständig in ein und derselben Spur läuft und dadurch Einschnitte in den Tellern hervorrufen könnte, ist der vom ersten Bremselement ausgebildete erste Teller drehangetrieben. In vorteilhafter Weise ist dabei so vorgegangen, daß das erste Bremselement aus einem magnetkraftdurchlässigen Material besteht und vor einem Elektromagneten angeordnet ist. Das Kraftfeld kann also das erste Bremselement durchsetzen und wird am zweiten dazu bewegbaren Bremselement wirksam. Ferner ist hervorzuheben, daß die Magnetkraft über einen von der Antriebswelle des ersten Tellers ausgebildeten Kern übertragen wird. Das Kraftfeld des Magneten wird demgemäß optimal am zweiten Bremselement wirksam. Eine Grundeinstellung der Bremskraft, unabhängig von der durch den Elektromagneten bewirkten Auflagekraft resultiert daraus, daß eine in Verlängerung der Antriebswelle sich erstreckende Gewindestange eine Einstellmutter für die Vorspann-Druckfeder trägt. Die Vorspannung ist daher auf die zu verarbeitende Fadenbeschaffenheit wie auch Fadendurchzugsgeschwindigkeit einstellbar. Um die Vorspann-Druckfeder vor Verstaubung bzw. Verschmutzung zu schützen, ist sie in einem teleskopartigen Gehäuse eingekapselt. Ungeachtet einer Verlagerung der Einstellmutter verbleibt die Vorspann-Druckfeder stets in einer geschützten Lage. Ein weiteres vorteilhaftes Merkmal ist darin zu sehen, zwei nebeneinander angeordnete, drehangetriebene Tellerbremsen vorzusehen, von denen wenigstens die eine bewegungsfrei durch Magnetkraft wirkungsmodulierbar ist. Durchläuft eine geknotete Stelle des Fadens die Fadenbremsvorrichtung, verbleibt stets eine der beiden Tellerbremsen in Bremsanlagestellung zum Faden unter Optimierung des Fadendurchzuges. Sodann ist hervorzuheben, daß eine der beiden Tellerbremsen-Antriebswellen die Verlängerung der Antriebswelle eines elektrischen Antriebes ist und die Antriebswelle der anderen Tellerbremse über ein Zwischenrad synchron zur einen Tellerbremse angetrieben ist. Die Drehrichtung der Teller dieser Tellerbremsen ist also gleich. Auch besitzen die mit dem Zwischenrad zusammenwirkenden Räder der Antriebswellen gleichen Durchmesser, so daß die ersten Teller dieser beiden Tellerbremsen mit gleicher Geschwindigkeit umlaufen. Ist die erfindungsgemäße Fadenbremsvorrichtung einer Webmaschine vorgeordnet, so ist die Modulierung der Magnetkraft von der Webmaschine steuerbar. Das Lüft- und Bremssignal geschieht dabei in Abhängigkeit vom Schußfadeneintrag und ist aufgrund der erfindungsgemäßen Wirkungsweise der Fadenbremsvorrichtung kurzfristig umsetzbar, was zur Optimierung des zu fertigenden Gewebes selbst beiträgt. Bevorzugt kann hierbei die Modulierung durch Strom-/Spannungsstöße erfolgen, und zwar gesteuert durch die Hauptwelle der Webmaschine. Es ist dabei eine Bremsung mit variabler Kraft möglich. Sodann ist vorgesehen, daß der Drehantrieb der Bremse bei Ausbleiben der Strom/Spannungsstöße selbsttätig aussetzt. Schließlich ist noch zu erwähnen, daß der Kern bzw. der zweite Teller aus schnellentmagnetisierendem Material bestehen verbunden mit einer optimalen Ausnutzung des magnetischen Kraftfeldes.According to such embodiment, a brake of the type in question is created by increased use value. During the modulation of the bearing force, the movable brake member, so the second brake element is stationary. Only the contact force in the direction of the first brake element varies. This means that no moving masses and thus inertia delays are present, which leads to an extremely responsive design of the yarn brake. Then arises from this fact a lesser wear and thus longer life of the yarn braking device. The idea according to the invention can advantageously be applied to a disk brake. This means that its braking elements represent plates between which the current thread is pulled. Thus, the thread is not constantly running in the same lane and thereby could cause cuts in the plates, the trained by the first brake member first plate is rotationally driven. In an advantageous manner, the procedure is such that the first brake element consists of a magnetic-permeable material and is arranged in front of an electromagnet. The force field can thus enforce the first brake element and is effective on the second movable braking element. It should also be emphasized that the magnetic force is transmitted via a core formed by the drive shaft of the first plate. The force field of the magnet is thus optimally effective on the second brake element. A basic adjustment of the braking force, independent of the contact force caused by the electromagnet, results from the fact that a threaded rod extending in extension of the drive shaft carries an adjusting nut for the pretensioning compression spring. The bias is therefore adjustable to the processed thread texture as well as thread pulling speed. To the It is encapsulated in a telescopic housing to protect the pretensioning spring from dust or dirt. Regardless of a displacement of the adjusting nut, the biasing compression spring always remains in a protected position. A further advantageous feature is to be seen to provide two juxtaposed, rotationally driven plate brakes, of which at least one is free to be modulated motion by magnetic force. If a knotted point of the thread passes through the thread brake device, one of the two plate brakes always remains in the brake contact position with respect to the thread, optimizing the passage of the thread. It should then be emphasized that one of the two plate brake drive shafts is the extension of the drive shaft of an electric drive and the drive shaft of the other plate brake is driven via an intermediate gear in synchronism with a disk brake. The direction of rotation of the plates of this plate brakes is therefore the same. Also, the co-operating with the intermediate wheels of the drive shafts have the same diameter, so that the first plate of these two plate brakes rotate at the same speed. If the thread braking device according to the invention precedes a weaving machine, then the modulation of the magnetic force can be controlled by the weaving machine. The release and brake signal occurs depending on the weft insertion and can be implemented in the short term due to the operation of the yarn braking device according to the invention, which contributes to the optimization of the fabric to be produced itself. In this case, the modulation can preferably be effected by current surges, controlled by the main shaft of the weaving machine. It is possible to brake with variable force. Then it is provided that the rotary drive of the brake automatically in the absence of power surges exposes. Finally, it should be mentioned that the core or the second plate consist of rapidly demagnetizing material connected to an optimal utilization of the magnetic force field.

Nachstehend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnungen erläutert. Es zeigt

Fig. 1
eine Ansicht einer erfindungsgemäß ausgebildeten Fadenbremsvorrichtung,
Fig. 2
eine Draufsicht auf die Fadenbremsvorrichtung und
Fig. 3
den Schnitt nach der Linie III-III in Fig. 2, vergrößert dargestellt.
Hereinafter, an embodiment of the invention will be explained with reference to the drawings. It shows
Fig. 1
a view of an inventively designed yarn braking device,
Fig. 2
a plan view of the yarn braking device and
Fig. 3
the section along the line III-III in Fig. 2 , shown enlarged.

Mit der Ziffer 1 ist als Ganzes eine Fadenbremsvorrichtung bezeichnet. Sie besitzt ein kastenförmiges Gehäuse 2, welches durch einen Deckel 3 verschlossen ist. Das im Grundriß langgestreckte, rechteckig ausgebildete Gehäuse 2 weist zwei in Längsrichtung hintereinander angeordnete Tellerbremsen 4, 5 auf.The numeral 1 denotes a yarn braking device as a whole. It has a box-shaped housing 2, which is closed by a cover 3. The elongated in plan view, rectangular shaped housing 2 has two longitudinally successively arranged plate brakes 4, 5.

Die erste Tellerbremse 4 ist mit einem elektrischen Antrieb 6 ausgestattet, welcher sich aus einem Elektromotor M und einem nachgeschalteten Getriebe G zusammensetzt. Sowohl der Elektromotor M als auch das Getriebe G befinden sich im Inneren des Gehäuses 2 derart, daß das Getriebe G an der Unterseite des Deckels 3 festgeschraubt ist. Die als Verlängerung der Getriebe-Antriebswelle ausgebildete Antriebswelle 7 durchgreift den Deckel 3 und trägt drehfest ein mit ihr verbundenes, stirngezahntes Antriebsrad 8. Weiterhin trägt die Antriebswelle 7, dem Antriebsrad 8 nachgeordnet, einen Drehkranz 9 mit einem auf seiner freien Stirnfläche vorgesehenen Reibbelag 10, gegen welchen die innere Bodenfläche eines ersten Tellers 11 tritt. An der äußeren Bodenfläche dieses ersten Tellers 11 stützt sich die äußere Bodenfläche eines zweiten Tellers 12 ab, welche Teller 11, 12 zwischen sich einen keilförmig ausgebildeten Spalt belassen. In ein Innengewinde des Drehkranzes 9 ist eine Gewindestange 13 eingeschraubt. Diese trägt an ihrem freien Ende eine Einstellmutter 14, welche unter Zwischenlage einer auf der Gewindestange 13 verschieblichen Hülse 15 auf eine Vorspann-Druckfeder 16 einwirkt. Deren anderes Ende beaufschlagt den Boden einer topfförmigen Büchse 17, die ihrerseits einen Druckkragen 18 in Richtung des zweiten Tellers 12 beaufschlagt und damit den zweiten Teller 12 in Richtung des ersten Tellers 11. Die Einstellmutter 14, die topfförmige Büchse 17 und der Druckkragen 18 bilden dabei ein teleskopartiges Gehäuse, in welchem die nach einer Kegelstumpflinie verlaufende Vorspann-Druckfeder 16 staubgeschützt einliegt. Die Anordnung der Druckfeder 16 ist derart, daß sich der durchmessergrößere Gewindegang an dem Boden der topfförmigen Büchse 17 abstützt.The first disk brake 4 is equipped with an electric drive 6, which is composed of an electric motor M and a downstream transmission G. Both the electric motor M and the gear G are located in the interior of the housing 2 such that the gear G is screwed to the underside of the lid 3. The trained as an extension of the transmission drive shaft drive shaft 7 passes through the lid 3 and rotatably carries a connected with her, front-toothed drive 8. Furthermore, the drive shaft 7, the drive wheel 8 downstream, a Slewing ring 9 with a provided on its free end face friction lining 10, against which the inner bottom surface of a first plate 11 occurs. On the outer bottom surface of this first plate 11, the outer bottom surface of a second plate 12 is supported, which plates 11, 12 leave a wedge-shaped gap between them. In an internal thread of the turntable 9, a threaded rod 13 is screwed. This carries at its free end an adjusting nut 14, which acts with the interposition of a displaceable on the threaded rod 13 sleeve 15 on a biasing compression spring 16. The other end acts on the bottom of a cup-shaped sleeve 17, which in turn acts on a pressure collar 18 in the direction of the second plate 12 and thus the second plate 12 in the direction of the first plate 11. The adjusting nut 14, the cup-shaped sleeve 17 and the pressure collar 18 form a telescopic housing in which the running after a truncated cone biasing spring 16 rests protected against dust. The arrangement of the compression spring 16 is such that the larger diameter thread is supported at the bottom of the pot-shaped sleeve 17.

Den Tellern 11, 12 ist eine Fadenrolle 19 vorgeordnet, deren Achse quer zur Längserstreckung des Gehäuses 2 verläuft und damit quer zur Fadendurchzugsrichtung. Im Anschluß an die Fadenrolle 19 trägt der Deckel 3 eine Fadenöse 20 zum Durchtritt des Fadens F.The plates 11, 12 is preceded by a thread roller 19 whose axis extends transversely to the longitudinal extent of the housing 2 and thus transversely to the thread passage direction. Following the thread roller 19, the cover 3 carries a thread eyelet 20 for the passage of the thread F.

Der Tellerbremse 5 ist gehäuseinnenseitig ein Elektromagnet 21 zugeordnet, welcher ebenfalls von dem Deckel 3 getragen ist. Der Wicklungsträger 22 ist mittig durchsetzt von einer einen Kern bildenden Antriebswelle 23, welche parallel zur Antriebswelle 7 der Tellerbremse 4 verläuft. Es liegt eine drehbare, jedoch axial unverschiebliche Anordnung der Antriebswelle 23 zum Elektromagneten 21 vor. Auf gleicher Höhe zum Antriebsrad 8 trägt die Antriebswelle 23 ein aus Kunststoff bestehendes Zahnrad 24. Dieses und das Antriebsrad 8 kämmen mit einem Zwischenrad 25, welches um eine im Deckel 3 angeordnete Achse 26 drehbar ist. Da beide Räder 8, 24 gleichen Durchmesser besitzen, laufen die Antriebswellen 7, 23 synchron um.The disk brake 5 is inside the housing associated with an electromagnet 21, which is also supported by the cover 3. The winding support 22 is centrally penetrated by a core forming a drive shaft 23, which parallel to the drive shaft 7 of the Plate brake 4 runs. There is a rotatable, but axially non-displaceable arrangement of the drive shaft 23 to the electromagnet 21 before. At the same height to the drive wheel 8, the drive shaft 23 carries a plastic gear 24. This and the drive wheel 8 mesh with an intermediate 25, which is rotatable about an axis 26 arranged in the cover 3. Since both wheels 8, 24 have the same diameter, the drive shafts 7, 23 run synchronously.

Jenseits des mit der Antriebswelle 23 fest verbundenen Zahnrades 24 trägt die Antriebswelle 23 drehfest eine Zwischenhülse 27, die ihrerseits zur drehfesten Festlegung eines ersten Bremselementes 28 dient, welches ebenfalls als erster Teller ausgebildet ist und in seiner Form und Anordnung dem ersten Teller 11 der Tellerbremse 4 entspricht. Somit ist auch dieser vom ersten Bremselement 28 ausgebildete erste Teller drehangetrieben. Für das erste Bremselement 28 ist magnetkraftdurchlässiges Material gewählt. Beim Ausführungsbeispiel handelt es sich um Messing. In Verlängerung der Antriebswelle 23 erstreckt sich ebenfalls eine Gewindestange 29. Auch sie trägt eine Einstellmutter 30, die über eine Hülse 31 auf eine Vorspann-Druckfeder 32 einwirkt. Es liegt auch hier wiederum eine gekapselte Ausgestaltung der Vorspann-Druckfeder 32 in einem Gehäuse vor, wozu eine topfförmige Büchse 33 und ein Druckkragen 34 vorgesehen sind. Die Einkapselung der Tellerbremse 5 entspricht derjenigen der Tellerbremse 4, so daß hierauf nicht weiter eingegangen wird. Der Druckkragen 34 beaufschlagt das zweite, zum ersten Bremselement 28 bewegliche Bremselement 35, welches tellerförmig ausgebildet ist und dem zweiten Teller 12 der Tellerbremse 4 entspricht.Beyond the drive shaft 23 fixedly connected gear 24 carries the drive shaft 23 rotatably an intermediate sleeve 27, which in turn serves for rotationally fixed fixing a first brake element 28, which is also formed as a first plate and in its shape and arrangement of the first plate 11 of the disk brake 4th equivalent. Thus, this formed by the first brake element 28 first plate is rotationally driven. For the first brake element 28 magnetically permeable material is selected. The embodiment is brass. In extension of the drive shaft 23 also extends a threaded rod 29. It also carries an adjusting nut 30 which acts via a sleeve 31 on a biasing compression spring 32. Again, there is an encapsulated embodiment of the biasing compression spring 32 in a housing, including a cup-shaped sleeve 33 and a pressure collar 34 are provided. The encapsulation of the disk brake 5 corresponds to that of the disk brake 4, so that will not be discussed further. The pressure collar 34 acts on the second, movable to the first brake element 28 brake element 35, which is plate-shaped and the second plate 12 of the disk brake 4 corresponds.

Ihre Zentrierung erhalten die Teller 11, 12 sowie die tellerförmigen Bremselemente 28, 35 durch mit den Antriebswellen 7, 23 drehfest verbundene Zentrierhülsen 36 bzw. 37, welche die Gewindestangen 13 bzw. 29 teilweise umgreifen.Their centering obtained the plates 11, 12 and the plate-shaped brake elements 28, 35 by with the drive shafts 7, 23 rotatably connected centering sleeves 36 and 37, which surround the threaded rods 13 and 29 partially.

Im Gegensatz zur Tellerbremse 4 ist die Tellerbremse 5 durch Magnetkraft wirkungsmodulierbar. Dabei wird die Magnetkraft auf das tellerartige zweite Bremselement 35 über die den Kern bildende Antriebswelle 23 übertragen. Sowohl der Kern -Antriebswelle 23- als auch der zweite Teller, zweites Bremselement 35, bestehen aus schnellentmagnetisierendem Material.In contrast to the disk brake 4, the disk brake 5 can be modulated by magnetic force. In this case, the magnetic force is transmitted to the plate-like second brake element 35 via the drive shaft 23 forming the core. Both the core drive shaft 23- and the second plate, second brake element 35, consist of fast demagnetizing material.

Wie der Tellerbremse 4 ist auch der Tellerbremse 5 eine Fadenrolle 38 und eine Fadenöse 39 zugeordnet.Like the disk brake 4, the disk brake 5 is assigned a thread roller 38 and a thread eye 39.

Die Tellerbremse 5 wirkt in der Weise, daß im Takt mit der Arbeitsweise der Webmaschine lediglich die Auflagekraft des in Richtung auf das erste Bremselement 28 federvorgespannten zweiten Bremselementes 35 auf den Faden F modulierbar ist. Die entsprechende Modulierung erfolgt dabei durch Strom/Spannungsstöße und wird von der Hauptwelle der Webmaschine gesteuert. Es erfolgt dabei eine Bremsung mit variabler Kraft. Während des Fadendurchlaufes ist der Drehantrieb der Fadenbremsvorrichtung eingeschaltet. Ein Aussetzen des Drehantriebes der Fadenbremsvorrichtung erfolgt bei Ausbleiben der strom/Spannungsstöße selbsttätig. Durch den Drehantrieb ist gewährleistet, daß die Bremselemente eine gleichmäßige Abnutzung erhalten und sich keine Spuren wie beim Stand der Technik eingraben. Ferner wird einer Verschmutzung weitgehend entgegengewirkt.The disk brake 5 acts in such a way that in time with the operation of the weaving machine, only the bearing force of the second brake element 35, which is spring-biased in the direction of the first brake element 28, can be modulated onto the thread F. The corresponding modulation takes place by current / voltage surges and is controlled by the main shaft of the loom. There is a braking with variable force. During the thread pass the rotary drive of the thread braking device is turned on. A suspension of the rotary drive of the yarn braking device takes place automatically in the absence of current / surges. The rotary drive ensures that the brake elements receive a uniform wear and dig no traces as in the prior art. Furthermore, pollution is largely counteracted.

Jede Tellerbremse 4, 5 ist mit einem unterhalb des ersten Tellers 11, 28 befindlichen Dichtkragen 40 bzw. 41 ausgestattet, um auch den Innenraum des Gehäuses 2 vor Verstaubung bzw. Verschmutzung zu schützen.Each disk brake 4, 5 is equipped with a sealing collar 40 or 41 located below the first plate 11, 28, in order to protect the interior of the housing 2 against dusting or contamination.

Claims (14)

  1. Brake for running yarns (F), with a first braking element (28) and a second braking element (35) which can move relative to the latter and which, actuated by magnetic force, acts on the yarn (F) pulled through between the braking elements (28, 35) with a force which can be modulated, wherein the bearing force of the second braking element (35) on the yarn (F) can be modulated, characterised in that the bearing force of the second braking element (35) is spring-preloaded in the direction of the first braking element (28).
  2. Brake according to Claim 1, characterised in that the first and second braking elements (28, 35) are discs of a disc brake (5).
  3. Brake according to Claim 2, characterised in that the first disc forming the first braking element (28) is rotatably driven.
  4. Brake according to Claim 1, characterised in that the first braking element (28) consists of a magnetic force-transmitting material and is disposed before an electromagnet (21).
  5. Brake according to Claim 4, characterised in that the magnetic force is transmitted via a core formed by the drive shaft (23) of the disc forming the first braking element (28).
  6. Brake according to at least one of the preceding Claims, characterised in that a threaded rod (29) extending in a prolongation of a drive shaft (23) bears an adjusting nut (30) for a preloading compression spring (32).
  7. Brake according to Claim 6, characterised in that the preloading compression spring (32) is encapsulated in a telescopic housing.
  8. Brake according to at least one of the preceding Claims, characterised by two rotatably driven disc brakes (4, 5) disposed side by side, at least one (5) of which can be modulated in action in a motionless manner by magnetic force.
  9. Brake according to at least one of the preceding Claims, characterised in that one of two disc brake drive shafts (7, 23) is the prolongation of the driven shaft of an electric drive (6) and the drive shaft (23) of the other disc brake (5) is driven in synchronism with a disc brake (4) via an intermediate wheel (25).
  10. Brake according to at least one of the preceding Claims, characterised in that the modulation of the magnetic force can be controlled by the loom.
  11. Brake according to Claim 10, characterised in that the modulation takes place through current-voltage surges, controlled by the main shaft of the loom.
  12. Brake according to at least one of the preceding Claims, characterised in that the braking takes place with a variable force.
  13. Brake according to at least one of the preceding Claims, characterised in that the rotary drive of the brake automatically stops in the absence of the current-voltage surges.
  14. Brake according to at least one of the preceding Claims, characterised in that the drive shaft (23) or the disc forming the second braking element (35) consists of material which quickly demagnetises.
EP98967145A 1997-12-03 1998-12-03 Yarn braking device Expired - Lifetime EP1218275B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29721138U DE29721138U1 (en) 1997-12-03 1997-12-03 Thread brake device
DE2972138 1997-12-03
PCT/EP1998/007881 WO1999028228A1 (en) 1997-12-03 1998-12-03 Yarn tensioning device

Publications (2)

Publication Number Publication Date
EP1218275A1 EP1218275A1 (en) 2002-07-03
EP1218275B1 true EP1218275B1 (en) 2008-02-27

Family

ID=8049276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98967145A Expired - Lifetime EP1218275B1 (en) 1997-12-03 1998-12-03 Yarn braking device

Country Status (3)

Country Link
EP (1) EP1218275B1 (en)
DE (2) DE29721138U1 (en)
WO (1) WO1999028228A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004515261A (en) 2000-04-25 2004-05-27 アライン テクノロジー， インコーポレイテッド Dental appliance implant function and method
EP1831385B1 (en) * 2004-12-22 2015-04-22 Novozymes North America, Inc. Enzymes for starch processing
JP2020204106A (en) * 2019-06-18 2020-12-24 株式会社島精機製作所 Thread tension adjusting device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2758335C2 (en) * 1977-12-27 1986-04-17 W. Schlafhorst & Co, 4050 Mönchengladbach Thread brake
DE4130301A1 (en) * 1991-09-12 1993-03-18 Schlafhorst & Co W ROTATING DRIVE BRAKE CONTROL ARRANGEMENT OF A THREAD TENSIONER
US5238202A (en) * 1992-04-15 1993-08-24 Intronics, Inc. Yarn tensioning apparatus
EP0756028B1 (en) * 1995-07-24 2000-01-19 Sulzer RàœTi Ag Electromagnetic yarn brake and loom with such yarn brake
DE29517027U1 (en) * 1995-10-27 1997-04-10 BARTH-TEX Instruments + Software GmbH + Co, 72411 Bodelshausen Thread brake

Also Published As

Publication number Publication date
DE59814180D1 (en) 2008-04-10
EP1218275A1 (en) 2002-07-03
DE29721138U1 (en) 1999-04-08
WO1999028228A1 (en) 1999-06-10

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