EP0467059B1 - Dispositif de régulation de la tension de la trame et de rappel de celle-ci sur des machines à tisser - Google Patents

Dispositif de régulation de la tension de la trame et de rappel de celle-ci sur des machines à tisser Download PDF

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Publication number
EP0467059B1
EP0467059B1 EP91109117A EP91109117A EP0467059B1 EP 0467059 B1 EP0467059 B1 EP 0467059B1 EP 91109117 A EP91109117 A EP 91109117A EP 91109117 A EP91109117 A EP 91109117A EP 0467059 B1 EP0467059 B1 EP 0467059B1
Authority
EP
European Patent Office
Prior art keywords
yarn
lever
weft yarn
tension
weft
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
EP91109117A
Other languages
German (de)
English (en)
Other versions
EP0467059A1 (fr
Inventor
Luigi Pezzoli
Rossano Maffeo
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.)
NUOVA VAMATEX SpA
Original Assignee
NUOVA VAMATEX SpA
Vamatex Nuova SpA
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Filing date
Publication date
Application filed by NUOVA VAMATEX SpA, Vamatex Nuova SpA filed Critical NUOVA VAMATEX SpA
Publication of EP0467059A1 publication Critical patent/EP0467059A1/fr
Application granted granted Critical
Publication of EP0467059B1 publication Critical patent/EP0467059B1/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
    • 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
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
    • 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
    • B65H59/36—Floating elements compensating for irregularities in supply or take-up of 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
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • weft yarns are inserted by suitable transport means into the sequence of warp yarns forming the shed.
  • the weft yarns are then pressed together by a reed during beating up.
  • the known systems for weft insertion into the shed are, in shuttleless looms, the projectile, the gripper, the water and the air system.
  • the weft yarn When insertion takes place, the weft yarn is unwound from reels or drawn from weft feeders, and is inserted into the shed with a motion law varying according to the system adopted. As the yarn end undergoes an acceleration, said yarn is subjected - on account of its mass and of the frictions involved - to an increasing tension, whereas the deceleration of the yarn end reduces weft yarn tension. Said tension could thus even drop to zero, causing quite a lot of weaving problems and spoiling the quality of the fabric.
  • weft yarn braking devices have since long been used in technique, said devices being apt to increase yarn tension by producing a friction thereon as it moves along. For instance, use is made of two braking elements pressed one against the other by elastic means, the weft yarn to be braked sliding between said elements. In this case, to adjust the braking action, the elastic coupling pressure is varied either manually, by an operator, and/or by mechanical or electromagnetic devices.
  • the yarn braking device of EP-A-0 356 380 is cited, which is of plunger type, and driven by a linear electric motor.
  • Said devices generally comprise an oscillating lever controlled by kinematic mechanisms, by cans or by springs, having at the end a yarn guide whose axis, in the rest position, is aligned with that of two fixed yarn guides positioned to the sides thereof. The yarn slides in a straight line through said yarn guide.
  • the lever oscillates moving its yarn guide out of alignment from the fixed yarn guides, and hence pulling back the weft yarn on the side where there is less braking resistance, namely from the warp shed, since on the side of the reel or of the weft feeder there acts a braking device.
  • the present invention now proposes a device which is apt to perform both the function of yarn tension regulator and that of yarn retracting, and wherein the lever stroke can be varied while the loom is working, as said device is suitably controlled by an electronic system.
  • Such a device - of the type comprising at least one oscillating lever having a yarn guide at the end which, in the lever rest position, and a linear electric motor driving said oscillating lever to obtain shiftings thereof is interposed between two fixed yarn guides/- is characterized in that said linear electric motor is controlled by an electronic system associated to the electronic system which controls the loom and in that, the electronic system controlling said motor comprises a sensor constantly detecting the position of said lever.
  • the device according to the invention applied between a left feeder A with brake means F and the warp shed P of a loom, comprises a lever 1 (more levers could however be provided) pivoted on a pin 2 and rotating about said pin under the control of a linear electric motor 3.
  • the lever 1 carries at one end a yarn guide 4 and at the other end a coil 5 (more coils could however be provided) forming the linear motor 3.
  • Said motor also comprises two permanent magnets 6, supported by a ferromagnetic plate 7, which generate a magnetic field into which is immersed the coil 5.
  • the lever 1 oscillates rotating about the pin 2 and its position is constantly detected by sensors 8.
  • An electronic control system detects in fact the position of the lever 1 through the position sensor 8 and - taking into account the signals issued by the microprocessor 10 equipping the loom on which the device of the invention is mounted - suitably feeds the coil 5 of the linear electric motor 3.
  • the linear motor 3 is fed by the control system 9 so that the force transmitted to the lever 1 by the coil 5 is apt to balance the force imparted by the yarn f on said lever 1 in correspondence of the yarn guide 4, which force tends to shift said lever from the position established by the control system 9 and detected by the position sensor 8.
  • the force in correspondence of the coil 5 increases almost linearly with the electric feed current going through the same, and it is thus possible to calculate the tension of the yarn f by knowing the feed current required to balance the lever 1.
  • the system 9 thus compares the tension of the yarn f, through the various points of the loom working cycle, with the values or with the allowable interval of values memorized for that type of weft, and it operates - if required - so as to vary the tension of the weft yarn and regulate it (in the sense of reducing it if it exceeds the preset value, or viceversa).
  • the tension increase is obtained by lifting the yarn guide 4 in respect of the two fixed yarn guides 11; when in alignment with said yarn guides, the yarn guide 4 of the lever 1 takes up the rest position of the device. In fact, weft yarn tension T downstream of the device increases on increasing of the yarn winding angles around the yarn guides 11.
  • the device to regulate weft yarn tension can be timed with the device to open the warp shed, by connecting the microprocessor 10 of the loom with the control system 9, so as to increase weft yarn braking at the outlet of the gripper - and make up for the scarce braking thereof by the warp yarns of certain weaves - thereby favouring weft release from the gripper at the outlet of the warp shed and hence reducing yarn wastes.
  • the device according to the invention can be mounted both upstream (a device for each weft yarn) of the weft presenting device, and downstream thereof (only one device).
  • the device according to the invention is mounted upstream of the main nozzle; it increases weft braking in the final part of yarn insertion.
  • the increase in weft braking limits its speed at the end of insertion, thereby reducing weft impact against the stop pin of the measuring weft feeder (and thus the vibrations produced by impact).
  • the system If the system is not apt to keep, when operating, the tension variations within the preset range, it signals the defect to the operator by way of a diagnostic program.
  • the system can also work, independently from weft yarn tension, simply as a programmable yarn retracting device (not claimed).

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Woven Fabrics (AREA)
  • Paper (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Claims (5)

  1. Dispositif de régulation de la tension du fil de trame et de rétraction du fil de trame dans la foule (P) de métiers - du type comprenant au moins un levier oscillant (1) comportant un guide de fil (4) à son extrémité qui, dans la position de repos du levier, est disposé entre deux guides de fil fixes (11) et un moteur électrique linéaire (5, 6) entraînant ledit lever oscillant pour obtenir des déplacements de celui-ci - de sorte que ledit moteur électrique linéaire soit commandé par un système électronique (9) associé au système électronique (10) qui commande le métier et que le système électronique (9) commandant ledit moteur (5, 6) comprenne un capteur (8) détectant en permanence la position dudit lever (1).
  2. Dispositif selon la revendication 1, dans lequel ledit système (9) commandant le moteur électrique linéaire (5, 6) est adapté à régler ledit moteur de manière à obtenir des déplacements dudit levier (1) qui peuvent être modifiés et programmés, durant le cycle de fonctionnement du métier, indépendamment de la tension du fil de trame étant distribué au métier.
  3. Dispositif selon les revendications 1 et 2, dans lequel lesdits systèmes électroniques (9, 10) comprennent un microprocesseur.
  4. Dispositif selon les revendications 1 à 3, adapté à signaler toute différence entre les valeurs prédéterminées de la tension du fil de trame et les valeurs détectées durant l'insertion de la trame, afin de modifier les paramètres de fonctionnement du métier pour rester dans la plage de valeurs de tension prédéterminées.
  5. Dispositif selon la revendication 1, adapté à réguler la tension du fil de trame également lorsque le fil est rétracté dans la foule (P).
EP91109117A 1990-06-11 1991-06-04 Dispositif de régulation de la tension de la trame et de rappel de celle-ci sur des machines à tisser Expired - Lifetime EP0467059B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2059990 1990-06-11
IT02059990A IT1248716B (it) 1990-06-11 1990-06-11 Dispositivo per la regolazione della tensione ed il recupero del filo di trama in telai di tessitura

Publications (2)

Publication Number Publication Date
EP0467059A1 EP0467059A1 (fr) 1992-01-22
EP0467059B1 true EP0467059B1 (fr) 1995-02-22

Family

ID=11169374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91109117A Expired - Lifetime EP0467059B1 (fr) 1990-06-11 1991-06-04 Dispositif de régulation de la tension de la trame et de rappel de celle-ci sur des machines à tisser

Country Status (8)

Country Link
EP (1) EP0467059B1 (fr)
AT (1) ATE118830T1 (fr)
DE (1) DE69107536T2 (fr)
DK (1) DK0467059T3 (fr)
ES (1) ES2068430T3 (fr)
GR (1) GR3015168T3 (fr)
HK (1) HK46496A (fr)
IT (1) IT1248716B (fr)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4131652A1 (de) * 1991-09-23 1993-04-01 Iro Ab Webmaschine und eintragbremse fuer webmaschinen
DE4323748C1 (de) * 1993-07-15 1994-07-14 Dornier Gmbh Lindauer Schußfaden-Bremseinrichtung für Webmaschinen
IT1282898B1 (it) * 1995-09-20 1998-04-01 Mario Gallo Dispositivo per controllare la tensione di un filo.
IT1284778B1 (it) * 1996-09-03 1998-05-21 Lgl Electronics Spa Freno di trama perfezionato, particolarmente per telai ad aria
ATE217915T1 (de) * 1997-09-11 2002-06-15 Dornier Gmbh Lindauer Steuerbare schussfadenzubringer- und - klemmvorrichtung und vorrichtungsanordnung zum minimieren des schussfadenabfalles bei der gewebeherstellung auf webmaschinen, insbesondere auf greiferwebmaschinen
ITTO980207A1 (it) * 1998-03-12 1999-09-12 Lgl Electronics Spa Dispositivo di frenatura modulata del filato di trama per macchine tessili
IT1303154B1 (it) 1998-07-17 2000-10-30 Lgl Electronics Spa Dispositivo perfezionato di frenatura modulata del filato di trama permacchine tessili.
DE59905063D1 (de) 1998-12-09 2003-05-22 Sultex Ag Rueti Einrichtung zum gesteuerten Bewegen eines Kettfadens
EP1016743B1 (fr) * 1998-12-09 2003-04-16 Sultex AG Dispositif pour le déplacement commandé d'un fil de trame
NL1011171C1 (nl) * 1999-01-29 2000-08-01 Te Strake Bv Weefmachine met een inlooprem.
IT1308066B1 (it) * 1999-06-01 2001-11-29 Lgl Electronics Spa Dispositivo di comando di frenatrama, particolarmente per telaidi tessitura e simili
DE10013625A1 (de) 2000-03-18 2001-09-27 Dornier Gmbh Lindauer Fadenbremse, insbesondere Schussfadenbremse für Webmaschinen
NL1017378C2 (nl) * 2001-02-16 2002-08-19 Te Strake Bv Werkwijze voor de functiebewaking van een inlooprem.
JP3654350B2 (ja) * 2001-07-11 2005-06-02 津田駒工業株式会社 緯糸引き戻し制御方法
BE1014435A5 (nl) * 2001-10-19 2003-10-07 Dirk Benoit Inrichting voor het regelen van de spanning in een voortbewegend garen.
DE10218059A1 (de) 2002-04-23 2003-11-13 Dornier Gmbh Lindauer Vorrichtung und Verfahren zur Regelung der Fadenspannung eines Fadens bei Textilverarbeitungsmaschinen
ITTO20020857A1 (it) * 2002-10-04 2004-04-05 L G L Electronics Spa Dispositivo di controllo del freno di trama per telai di tessitura
ITTO20050781A1 (it) * 2005-11-04 2007-05-05 L G L Elecrtronics S P A Dispositivo di frenatura a recupero di trama per linee di tessitura
BRPI0621827B1 (pt) * 2006-08-09 2016-12-20 Memminger Iro Gmbh distribuidor de fios para máquinas de tricotar ou de fazer malha
CN102765638A (zh) * 2012-07-19 2012-11-07 绍兴文理学院 一种自动调节纱线张力的调节器
SE1650986A1 (en) * 2016-07-06 2018-01-07 Iro Ab Weft yarn feeding arrangement with motor drive
CN106435964A (zh) * 2016-11-29 2017-02-22 江苏悦达家纺有限公司 一种可调节纬纱张力的储纬器
CN107190409B (zh) * 2017-05-16 2019-02-19 东华大学 一种纱线张力比较装置
DE102018211537A1 (de) * 2018-07-11 2020-01-16 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Verfahren zum Schussfadeneintrag an einer Webmaschine und Webmaschine
EP3754069A1 (fr) 2019-06-17 2020-12-23 Vandewiele NV Dispositif de tension de fil de trame et procédé de fonctionnement d'un dispositif de tension de fil de trame
CN110923930B (zh) * 2019-11-12 2021-05-18 台州施特自动化有限公司 一种针织设备用进线机构
CN111115367B (zh) * 2020-01-06 2021-11-19 苏州创易技研股份有限公司 一种设定型张力控制系统及方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3803146C1 (en) * 1988-02-03 1989-04-06 Emil Jaeger Gmbh & Co Kg, 4400 Muenster, De Thread-tensioning device for the weft threads of a weaving machine
EP0356380B1 (fr) * 1988-08-25 1994-11-23 Sulzer RàœTi Ag Procédé pour éviter les pics de contrainte dans la trame lors de son introduction au moment du freinage
IT1227077B (it) * 1988-09-08 1991-03-14 Vamatex Spa Sistema per controllare la tensione della trama alimentata ad un telaio tessile senza navette.

Also Published As

Publication number Publication date
DE69107536T2 (de) 1995-06-22
DK0467059T3 (da) 1995-07-17
ES2068430T3 (es) 1995-04-16
IT9020599A1 (it) 1991-12-11
HK46496A (en) 1996-03-22
ATE118830T1 (de) 1995-03-15
GR3015168T3 (en) 1995-05-31
IT1248716B (it) 1995-01-26
EP0467059A1 (fr) 1992-01-22
IT9020599A0 (fr) 1990-06-11
DE69107536D1 (de) 1995-03-30

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