EP0475892B1 - Frein de fil pour métiers à tisser - Google Patents

Frein de fil pour métiers à tisser Download PDF

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Publication number
EP0475892B1
EP0475892B1 EP91810649A EP91810649A EP0475892B1 EP 0475892 B1 EP0475892 B1 EP 0475892B1 EP 91810649 A EP91810649 A EP 91810649A EP 91810649 A EP91810649 A EP 91810649A EP 0475892 B1 EP0475892 B1 EP 0475892B1
Authority
EP
European Patent Office
Prior art keywords
brake
thread
yarn
projectile
servomotor
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
EP91810649A
Other languages
German (de)
English (en)
Other versions
EP0475892A1 (fr
Inventor
Oskar Hübner
Rudolf Stauner
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.)
Itema Switzerland Ltd
Original Assignee
Sultex AG
Maschinenfabrik Rueti 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 Sultex AG, Maschinenfabrik Rueti AG filed Critical Sultex AG
Publication of EP0475892A1 publication Critical patent/EP0475892A1/fr
Application granted granted Critical
Publication of EP0475892B1 publication Critical patent/EP0475892B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B65H2555/20—Actuating means angular
    • B65H2555/23—Actuating means angular magnetic, e.g. rotary solenoids
    • 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
    • B65H2555/20—Actuating means angular
    • B65H2555/24—Servomotors
    • 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 thread brake according to the preamble of claim 1 and projectile and rapier weaving machines with such thread brakes.
  • thread tensioners between the supply bobbins and the shed, each consisting of a thread brake and a retraction or tensioning lever.
  • a thread brake which has proven itself very well in practice, has on the one hand a resilient metal band, which is held under tension by a spring, and on the other hand a brake body, the braking part of which is, for example, spoon-shaped.
  • the thread can be clamped between the band and the brake body, the brake body being pressed against the brake band. Since the brake band is flexible, partial braking can also be carried out, in which the thread can still be pulled between the two braking components of the thread brake against frictional forces.
  • the brake body is moved mechanically via a linkage that is controlled by means of a camshaft.
  • Such a thread brake is e.g. known from document US-A-4 431 036.
  • Such thread brakes have the advantage that their braking power can be controlled by means of a logic circuit and that the braking power can be easily adjusted, for example with regard to changing yarn properties, in particular when changing articles.
  • This object is achieved by the features of the characterizing part of claim 1.
  • a stepping motor is advantageously used as the servomotor for moving the brake body of the thread brake according to the invention, which has a drive shaft which, together with a permanent magnet attached to it, is rotated by a stationary ring of small electromagnets.
  • the electromagnets are arranged uniformly at angular intervals of, for example, 7.5 degrees and can be excited sequentially at time intervals of, for example, 2.5 milliseconds. With such a stepper motor, the brake can be opened in around 10 milliseconds.
  • the perspective view of the thread brake in Fig.1 shows the following components: the brake band 1; the brake body 2, which is pivotable about the axis 2a; a lever-like piece of sheet metal 3, over which the brake band 1 is tensioned by means of a spring 4; a horizontal, mandrel-like rod 5, at the tip of which the piece of sheet metal 3 is tiltably attached and which is connected at the other end 5a to other components of the weaving machine, not shown, for example a weft monitor and a supporting frame; Eyelet body 6a and 6b for guiding the weft 10; a vertical support beam 7, on which various components of the thread brake are attached.
  • FIG. 1 The following components can also be seen in FIG. 1: a support plate 8 for the stepper motor 20, which can be fastened in height on the support beam 7 by means of a screw 9; the drive shaft 21 and the connecting cable 22 of the stepping motor 20; a lever 23 fastened on the drive shaft 21 and a tab 24, via which a rotary movement of the stepping motor 20 can be converted into a lifting movement of the brake body 2; finally, a small permanent magnet 29 placed on the lever 23, which allows an inductive sensor 31 to determine a reference position of the stepping motor 20.
  • the stepper motor 20 is connected via the connection cable 22 to a control circuit and a logic circuit, not shown.
  • the sensor 31 transmits its signals to this logic circuit.
  • a control program can be stored in the memory of the logic circuit for each thread brake, which generates a stroke curve that is optimally adapted to the yarn properties of the weft thread, for example.
  • the stroke curve in FIG. 2a shows the course over time of the position which the braking surface of the brake body 2 occupies.
  • the phase of the machine cycle (machine degree) is usually used as a variable, which can be determined by a crank angle encoder on the main shaft.)
  • the period length T of the weaving cycle (corresponding to 360 machine degrees) is of the order of magnitude of 200 milliseconds.
  • the stroke H is positive if the brake gap is open, i.e. the brake is released. Since the brake band 1 is flexible, the stroke H can also be negative. With a weakly negative stroke, the Thread are still pulled between brake band 1 and brake body 2.
  • the thread brake is in the "partial braking" state: curve pieces 50 and 50 '.
  • the thread brake is in the released state, with the exception of a short initial phase: curve piece 51.
  • the thread brake opening corresponding to curve piece 60 takes place within approximately 10 to 15 milliseconds.
  • the braking of the thread - curve piece 61 - is carried out less abruptly than the release in order to protect the weft thread; it is transferred to a state of "full braking”: curve section 52.
  • curve section 62 again sets the partial braking. Further details of the stroke curve of the thread brake in projectile weaving machines are discussed below in connection with FIGS. 4a and 4b.
  • the lifting movement of the brake body 2 ' is generated directly via a threaded spindle 21'.
  • the brake body 2 ' is guided in a link-like sleeve 201, wherein rotation is prevented, for example, by a groove in the brake body 2' and a comb in the sleeve 201.
  • the thread brake shown in the foreground is in the state of full or partial braking; the thread brake in the background is released.
  • the brake band 1 and the eyelet bodies 6a and 6b can be of the same design as in the first exemplary embodiment (FIG. 1). As indicated in FIGS. 3a and 3a, the brake band 1 is anchored in the eyelet bodies 6a and 6b by means of suppositories 101, which are welded onto the band, for example.
  • the eyelet body 6a is fastened, for example, with a screw 102 to the sheet metal piece 3 that transmits the spring tension.
  • the stepper motor 20 has the shape of a flat box (diameter around 60 mm, height around 30 mm). Thanks to this shape, a compact arrangement can be set up for several thread brakes operating in parallel as shown in FIG. A compact arrangement is also possible for the thread brakes according to FIG. 3a if they are arranged offset, as shown in FIG. 3a.
  • the zero position can also be shifted vertically in the second exemplary embodiment (FIG. 2a) change the stepper motor with respect to a support structure, not shown.
  • the thread supply 11 with the weft thread 10 the thread brake according to the invention with the brake body 2 and the stepper motor 20, which is connected to the control and logic circuit 30; the tension lever 40 and the thread transmitter 41; the striker 42 and the projectile 43; the fabric 12 and the shed 13; the catch brake 80 for the projectile 43; a weft monitor 32 at the exit of the thread brake and a projectile catch monitor 33 on the catch side, both sensors 32 and 33 being connected to the logic circuit 30.
  • the thread transmitter 41 transfers the weft thread 10 to the projectile 43 and the thread brake begins with the lifting movement of its brake body 2.
  • the tensioning lever swivels 40 from its retracted position into the extended position, which is indicated in Fig.4b.
  • the thread brake must be released; because now, with full force, the weft thread 10 is drawn off from the supply spool 11 or from a thread store, not shown, by the accelerated projectile 41.
  • the weft thread 10 suffers the so-called draw stroke; this takes place at time S in the diagram in FIG. 2a.
  • the control of the thread brake must be programmed so that the Curve section 60 intersects the abscissa between points A and S.
  • the projectile 43 is brought to a standstill in the catch brake 80 at time B.
  • the thread brake also stops the movement of the weft thread 10.
  • the state of full braking ensures that, when the tensioning lever 40 is subsequently retracted, only weft thread 10 comes from the shed 13 and not also from the supply spool 11 (or from one thread store, not shown) is tightened.
  • the brake band 1 and the brake body 2 can be implemented has not been discussed in detail.
  • the brake body 2 can also be designed, for example, in the form of a double finger or in the form of a metal belt loop.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (11)

  1. Frein de fil pour des métiers à tisser, comprenant une bande de freinage (1) et un corps de freinage (2) mobile apte à être commandé, dans lequel le fil (10) est guidé entre la bande de freinage et le corps de freinage, caractérisé en ce que le corps de freinage peut être commandé par un moteur de positionnement (20) relié à un circuit logique et de commande (30), dans lequel on transforme un mouvement rotatif de l'arbre (21) du moteur de positionnement en un mouvement de soulèvement du corps de freinage (2).
  2. Frein de fil selon la revendication 1, caractérisé en ce que le moteur de positionnement (20) est un moteur pas-à-pas.
  3. Frein de fil selon la revendication 1 ou 2, caractérisé en ce que le circuit logique (30) est relié à un détecteur (31) avec lequel on peut enregistrer une position de référence de l'arbre (21) du moteur de positionnement.
  4. Frein de fil selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le moteur de positionnement (20) est relié en articulation au corps de freinage (2) à l'intervention d'un levier (23) et d'une bielle (24), dans lequel le corps de freinage pivote autour d'un axe (2a).
  5. Frein de fil selon les revendications 3 et 4, caractérisé en ce qu'un aimant permanent (29) est disposé contre le levier (23) et en ce que le détecteur (31) est un détecteur inductif avec lequel on peut se rendre compte que l'aimant permanent (29) se trouve dans la position de référence.
  6. Frein de fil selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le moteur de positionnement (20) imprime au corps de freinage (2') un mouvement linéaire à l'intervention d'une broche filetée (21').
  7. Métier à tisser à projectile comprenant au moins un frein de fil selon l'une quelconque des revendications 1 à 6.
  8. Métier à tisser à projectile selon la revendication 7, comprenant un dispositif (33) de surveillance d'interception disposé côté interception, qui est relié au circuit logique (30) du frein de fil.
  9. Métier à tisser à pince comprenant au moins un frein de fil selon l'une quelconque des revendications 1 à 6.
  10. Procédé pour la mise en service d'un métier à tisser à projectile selon la revendication 7, caractérisé en ce que le soulèvement du frein de fil a lieu après le lancement du projectile (moment A) et avant l'étirage brusque (moment S).
  11. Procédé selon la revendication 10, caractérisé en ce que l'ouverture du frein de fil dure moins de 15 millisecondes.
EP91810649A 1990-09-10 1991-08-15 Frein de fil pour métiers à tisser Expired - Lifetime EP0475892B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2935/90 1990-09-10
CH293590 1990-09-10

Publications (2)

Publication Number Publication Date
EP0475892A1 EP0475892A1 (fr) 1992-03-18
EP0475892B1 true EP0475892B1 (fr) 1995-05-17

Family

ID=4244939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810649A Expired - Lifetime EP0475892B1 (fr) 1990-09-10 1991-08-15 Frein de fil pour métiers à tisser

Country Status (6)

Country Link
US (1) US5179980A (fr)
EP (1) EP0475892B1 (fr)
JP (1) JPH04245955A (fr)
CN (1) CN1026904C (fr)
DE (1) DE59105505D1 (fr)
RU (1) RU2015221C1 (fr)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9113430U1 (de) * 1991-07-22 1992-12-24 Sobrevin Société de brevets industriels-Etablissement, Vaduz Vorrichtung zur unterschiedlichen Bremsung laufender Fäden, Drähte o.dgl.
DE4131652A1 (de) * 1991-09-23 1993-04-01 Iro Ab Webmaschine und eintragbremse fuer webmaschinen
DE9215226U1 (de) * 1992-11-09 1994-05-11 Sobrevin Société de brevets industriels-Etablissement, Vaduz Fadenbremse
US5476122A (en) * 1993-03-05 1995-12-19 Lindauer Dornier Gesellschaft Mbh Weft thread brake responsive to yarn characteristics in a loom
DE4306911C1 (de) * 1993-03-05 1993-12-23 Dornier Gmbh Lindauer Schußfadenbremse mit steuerbarer Bremswirkung
DE4323748C1 (de) * 1993-07-15 1994-07-14 Dornier Gmbh Lindauer Schußfaden-Bremseinrichtung für Webmaschinen
BE1007898A3 (nl) * 1993-12-22 1995-11-14 Picanol Nv Inrichting voor weefmachines.
SE503620C2 (sv) * 1994-02-14 1996-07-22 Aplicator System Ab Trådmatningsbuffert för matning av tråd
IT1268111B1 (it) * 1994-10-10 1997-02-20 Lgl Electronics Spa Dispositivo di frenatura modulata positiva del filato, per apparecchi alimentatori di trama
BE1009678A3 (nl) * 1995-10-02 1997-06-03 Picanol Nv Grijperweefmachine met een draadrem.
DE29806739U1 (de) * 1998-04-15 1999-09-02 Sucker-Müller-Hacoba GmbH & Co., 41066 Mönchengladbach Fadenbremsvorrichtung
SE9900665D0 (sv) * 1999-02-23 1999-02-23 Iro Patent Ag Vorrichtung und Verfahren zum variierenden Bremseneines laufenden Fadens
DE10013625A1 (de) * 2000-03-18 2001-09-27 Dornier Gmbh Lindauer Fadenbremse, insbesondere Schussfadenbremse für Webmaschinen
US7543610B2 (en) * 2006-06-16 2009-06-09 Sultex Ag Thread clamp for a rapier head
DE10218059A1 (de) 2002-04-23 2003-11-13 Dornier Gmbh Lindauer Vorrichtung und Verfahren zur Regelung der Fadenspannung eines Fadens bei Textilverarbeitungsmaschinen
ITTO20020460A1 (it) * 2002-05-30 2003-12-01 Lgl Electronics Spa Dispositivo di frenatura del filato per macchine tessili.
ITTO20020489A1 (it) * 2002-06-11 2003-12-11 Lgl Electronics Spa Dispositivo di frenatura del filato per macchine tessili.
JP3696184B2 (ja) * 2002-06-24 2005-09-14 榮製機株式会社 再充填可能なスプレー容器
DE10348872A1 (de) * 2003-10-21 2005-05-25 Iro Ab Verfahren zum Einstellen der Fadenspannung, und Projektil- oder Greiferwebmaschine
EP1811068B1 (fr) * 2006-01-24 2009-06-17 Sultex AG Frein de trame avec commande
EP1918437A1 (fr) * 2006-11-02 2008-05-07 Sultex AG Procédé et dispositif pour l'insertion du fil de trame
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
BE1018327A3 (nl) * 2008-10-31 2010-09-07 Picanol Nv Draadrem en werkwijze om de draadrem aan te wenden.
EP2354070B1 (fr) * 2010-02-01 2013-01-02 Iro Ab Tensionneur de fil
US10669653B2 (en) * 2015-06-18 2020-06-02 Kevin Kremeyer Directed energy deposition to facilitate high speed applications
ITUB20153417A1 (it) 2015-09-04 2017-03-04 Vhit Spa Dispositivo di pre-filling per un sistema di frenatura con dispositivo di asservimento e metodo di funzionamento del dispositivo di pre-filling
JP6928998B2 (ja) * 2017-05-31 2021-09-01 Ｎｉｔｔｏｋｕ株式会社 テンション装置
CN113174684B (zh) * 2021-04-28 2022-07-12 范德威尔（中国）纺织机械有限公司 纬纱制动器及其控制方法
CN114955723A (zh) * 2022-06-21 2022-08-30 西安英利科电气科技有限公司 一种采用重力的纱线恒张力装置

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
JPS5454468U (fr) * 1977-09-22 1979-04-14
CH648618A5 (de) * 1981-01-30 1985-03-29 Sulzer Ag Vorrichtung zum bremsen eines schussfadens einer webmaschine.
FR2568595B1 (fr) * 1984-08-02 1986-09-05 Alsacienne Constr Mat Tex Dispositif de commande positive pour frein de fil.
EP0189496B1 (fr) * 1985-01-28 1989-01-25 GebràœDer Sulzer Aktiengesellschaft Frein pour le projectile d'un métier à tisser
US4875506A (en) * 1987-05-27 1989-10-24 Sulzer Brothers Limited Yarn brake for a weft yarn
DE58908655D1 (de) * 1988-08-25 1995-01-05 Rueti Ag Maschf Verfahren zum Vermeiden von Spannungsspitzen eines Schussfadens beim Schusseintrag während des Bremsvorganges.
IT1227077B (it) * 1988-09-08 1991-03-14 Vamatex Spa Sistema per controllare la tensione della trama alimentata ad un telaio tessile senza navette.
BE1002841A3 (nl) * 1989-02-16 1991-06-25 Picanol N V Naamloze Vennoosch Inrichting voor het remmen van een inslagdraad in een weefmachine.

Also Published As

Publication number Publication date
JPH04245955A (ja) 1992-09-02
US5179980A (en) 1993-01-19
EP0475892A1 (fr) 1992-03-18
CN1059942A (zh) 1992-04-01
CN1026904C (zh) 1994-12-07
DE59105505D1 (de) 1995-06-22
RU2015221C1 (ru) 1994-06-30

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