EP1218275B1 - Dispositif de freinage de fil - Google Patents

Dispositif de freinage de fil 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
Authority
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)
English (en)
Other versions
EP1218275A1 (fr
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
Original Assignee
Iro Patent AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Iro Patent AG filed Critical Iro Patent AG
Publication of EP1218275A1 publication Critical patent/EP1218275A1/fr
Application granted granted Critical
Publication of EP1218275B1 publication Critical patent/EP1218275B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Abstract

Tendeur pour fils circulants, comportant un premier élément (28) et un second élément (35), mobile par rapport au premier, qui agit avec une force modulable sur le fil passé entre les élément tendeurs (28, 35), ce second élément étant actionné par une force magnétique. Dans ledit tendeur, seule la force d'appui du second élément (35) précontraint par ressort en direction du premier élément (28) est modulée sur le fil (F).

Claims (14)

  1. Frein pour fils (F) en circulation, comprenant un premier élément de freinage (28) et un second élément de freinage (35) qui est mobile par rapport à celui-ci et qui, actionné par une force magnétique, contraint avec une force modulable le fil (F) tiré entre les éléments de freinage (28, 35), la force d'application exercée par le second élément de freinage (35) sur le fil (F) étant modulable, caractérisé en ce que la force d'application du second élément de freinage (35) est contrainte par ressort en direction du premier élément de ressort (28).
  2. Frein selon la revendication 1, caractérisé en ce que les premier et second éléments de freinage (28, 35) sont constitués par des disques d'un frein à disques (5).
  3. Frein selon la revendication 2, caractérisé en ce que le premier disque qui forme le premier élément de freinage (28) est entraîné en rotation.
  4. Frein selon la revendication 1, caractérisé en ce que le premier élément de freinage (28) se compose d'une matière qui laisse passer une force magnétique et est disposé devant un électro-aimant (21).
  5. Frein selon la revendication 4, caractérisé en ce que la force magnétique est transmise par l'intermédiaire d'un noyau qui est formé par l'arbre d'entraînement (23) du disque définissant le premier élément de freinage (28).
  6. Frein selon l'une au moins des revendications précédentes, caractérisé en ce qu'une tige filetée (29) qui s'étend dans le prolongement d'un arbre d'entraînement (23) porte un écrou de réglage (30) pour un ressort de compression à contrainte initiale (32).
  7. Frein selon la revendication 6, caractérisé en ce que le ressort de compression à contrainte initiale (32) est enfermé dans une enveloppe télescopique.
  8. Frein selon l'une au moins des revendications précédentes, caractérisé par deux freins à disques (4, 5) disposés côte à côte et entraînés en rotation, l'action de l'un au moins (5) de ces freins étant modulable, sans contact, grâce à une force magnétique.
  9. Frein selon l'une au moins des revendications précédentes, caractérisé en ce que sur deux axes d'entraînement de freins à disques (7, 23), l'un au moins est constitué par le prolongement de l'arbre de sortie d'un entraînement électrique (6), et l'arbre d'entraînement (23) de l'autre frein à disques (5) est entraîné de manière synchrone par rapport au frein à disques (4) par l'intermédiaire d'une roue intermédiaire (25).
  10. Frein selon l'une au moins des revendications précédentes, caractérisé en ce que la modulation de la force magnétique est apte à être commandée par la machine de tissage.
  11. Frein selon la revendication 10, caractérisé en ce que la modulation est commandée par l'arbre principal de la machine de tissage, grâce à des chocs de courant/de tension.
  12. Frein selon l'une au moins des revendications précédentes, caractérisé en ce que le freinage se fait avec une force variable.
  13. Frein selon l'une au moins des revendications précédentes, caractérisé en ce que l'entraînement rotatif du frein s'arrête automatiquement en l'absence de chocs de courant/de tension.
  14. Frein selon l'une des revendications précédentes, caractérisé en ce que l'arbre d'entraînement (23) ou le disque qui forme le second élément de freinage (35) se compose d'une matière à démagnétisation rapide.
EP98967145A 1997-12-03 1998-12-03 Dispositif de freinage de fil Expired - Lifetime EP1218275B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29721138U DE29721138U1 (de) 1997-12-03 1997-12-03 Fadenbremsvorrichtung
DE2972138 1997-12-03
PCT/EP1998/007881 WO1999028228A1 (fr) 1997-12-03 1998-12-03 Tendeur de fil

Publications (2)

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

Family

ID=8049276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98967145A Expired - Lifetime EP1218275B1 (fr) 1997-12-03 1998-12-03 Dispositif de freinage de fil

Country Status (3)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2001255637A1 (en) 2000-04-25 2001-11-07 Align Technology, Inc. Systems and methods for varying elastic modulus appliances
DK2365068T3 (en) * 2004-12-22 2017-05-15 Novozymes As ENZYMER FOR PROCESSING STARCH
JP2020204106A (ja) * 2019-06-18 2020-12-24 株式会社島精機製作所 糸張力調整装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2758335C2 (de) * 1977-12-27 1986-04-17 W. Schlafhorst & Co, 4050 Mönchengladbach Fadenbremse
DE4130301A1 (de) * 1991-09-12 1993-03-18 Schlafhorst & Co W Rotierend angetriebene bremstelleranordnung eines fadenspanners
US5238202A (en) * 1992-04-15 1993-08-24 Intronics, Inc. Yarn tensioning apparatus
DE59507651D1 (de) * 1995-07-24 2000-02-24 Rueti Ag Maschf Elektromagnetische Fadenbremse und Webmaschine mit einer Fadenbremse
DE29517027U1 (de) * 1995-10-27 1997-04-10 BARTH-TEX Instruments + Software GmbH + Co, 72411 Bodelshausen Fadenbremse

Also Published As

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

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