EP1479808B1 - Procédé et dispositif de transfert de trame d'une griffe porteuse à une griffe tireuse - Google Patents

Procédé et dispositif de transfert de trame d'une griffe porteuse à une griffe tireuse Download PDF

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Publication number
EP1479808B1
EP1479808B1 EP20040076382 EP04076382A EP1479808B1 EP 1479808 B1 EP1479808 B1 EP 1479808B1 EP 20040076382 EP20040076382 EP 20040076382 EP 04076382 A EP04076382 A EP 04076382A EP 1479808 B1 EP1479808 B1 EP 1479808B1
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EP
European Patent Office
Prior art keywords
rapier
gripper
donor
take
weft yarn
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
EP20040076382
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German (de)
English (en)
Other versions
EP1479808A3 (fr
EP1479808A2 (fr
Inventor
Gilbert Moulin
Johny Debaes
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.)
Individual
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Individual
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Publication date
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Publication of EP1479808A2 publication Critical patent/EP1479808A2/fr
Publication of EP1479808A3 publication Critical patent/EP1479808A3/fr
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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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/18—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick two weft inserters meeting at or near the middle of the shed and transferring the weft from one to the other

Definitions

  • the invention relates to a rapier device for a weaving machine comprising a donor rapier provided to present a weft yarn to a gripper rapier, provided to take up a weft yarn.
  • a device to exactly adjust the path of motion of the rapier in order to create a good take-over position, so that the gripper rapier may take over unfailingly the weft yarn from the donor rapier is known from the European patent disclosure EP 1.288.358.
  • the gripper rapier has a tendency to be pushed away (away from the weaving reed) for a distance X2 - X1, when the hook of the gripper rapier collides with the weft yarn clamped in the donor rapier and tensioned by the weft supply device and/or the weft feeder.
  • X1 is the distance between the hook of the gripper rapier and the donor rapier in the free position.
  • X2 is the distance between the hook of the gripper rapier and the donor rapier being pushed away.
  • the donor rapier may be kept in its position, for instance, by providing a guide on its back side moving along the dent of the weaving reed at least the moment the yarn is taken over. Because the gripper rapier is pushed away, the relative position of the gripper rapier with respect to the donor rapier is not secured during the take-over.
  • the purpose of the present invention is to provide a rapier device no longer having the above-mentioned disadvantages on take-over the weft yarn from the donor rapier by the gripper rapier.
  • a rapier device for a weaving machine comprising a donor rapier, being provided to present a weft yarn to a gripper rapier provided to take up the weft yarn, the donor rapier and/or the gripper rapier being provided with means to realize a magnetic attractive force between the two rapiers in a take-over zone.
  • the take-over zone will be considered to be the zone from where a magnetic attractive force between donor and gripper rapier may be realized.
  • the means to realize a magnetic attractive force between the two rapiers in the take-over zone will comprise a permanent magnet or a magnetic actuator.
  • the donor and gripper rapiers are each provided with a permanent magnet having opposite signs.
  • one rapier is provided with a permanent magnet or a magnetic actuator, while the other rapier, at least partially, is made of a material that may be attracted by the magnet or the actuator.
  • the device is designed to realize a contact between the two rapiers, when the rapiers are situated, at least partially, next to one another, in the take-over zone, the contact being the result of said attractive force.
  • the attraction between the two rapiers is only realized after the hook of the gripper rapier has been pushed away by the collision with the weft yarn.
  • the permanent magnet or actuator is preferably installed in a place where, at the operating speed, the magnet will only attract the gripper rapier, after the hook of the gripper rapier has collided with the weft yarn in the donor rapier and has been pushed away as a result.
  • the path of motion of the donor and the gripper rapiers in the take-over zone is determined in such a manner that the donor and the gripper rapiers in the take-over zone will reach a take-over position in which these rapiers on their respective path of motion are situated next to one another, at least partly and that the device is designed to realize the magnetic attractive force between the two grippers, when the grippers are in this take-over zone.
  • the take-over zone is reached without any previous contact between the rapiers themselves and between the rapiers and the weft yarn.
  • the take-over position is considered being the position in the take-over zone where the contact between the donor and the gripper rapier may be realized.
  • the gripper rapier is adjusted such that its hook does not touch the weft yarn, because the rapier guide has been adjusted such that the gripper rapier is not moving entirely parallel to the donor rapier, but, preferably, is taken back to the donor rapier under the influence of the magnet or the actuator and will take along the weft yarn on its way back without any difficulties.
  • This has the advantage that more delicate weft yarns and weft yarns to be woven more difficultly, may be used.
  • Figure 1 is a top view of the rapier device according to the invention, comprising a donor rapier (2) designed to present a weft yarn (3) to the gripper rapier (1), designed to take over the weft yarn (3).
  • the donor rapier (2) is provided with a permanent magnet (4) in order to realize thereby, in the take-over zone, a magnetic attractive force between the donor rapier (2) and the gripper rapier which is, entirely or partly, made of a material that can be attracted by a magnet.
  • the donor (2) and or the gripper rapier (1) may also be provided with a magnetic actuator exercising a force, because of which the donor and the gripper rapier are mutually attracted.
  • the rapier device may be designed such that the attraction between donor (2) and gripper rapier (1) is realized only after the hook (5) of the gripper rapier (1) has been pushed away, for instance for a distance X2 because of the collision with the weft yarn (3).
  • This may be caused, for instance, by building in a permanent magnet (4) or an actuator in the donor rapier (2) in a place where, at the operational speed, the magnet is only exercising an attraction force on the gripper rapier (1) after the hook (5) of the gripper rapier (1) has collided with the weft yarn (3) in the donor rapier (2) and has been pushed away in consequence.
  • donor (2) and gripper rapier (1) are represented in the take-over position, the gripper rapier being in contact with the donor rapier because of the attractive force of the permanent magnet (4) or of the magnetic actuator in the donor rapier (2), so that, at the return motion of gripper (1) and donor rapier (2), the hook (5) and clip of the gripper rapier (1) is taking over the weft yarn (3) from the donor rapier (2).
  • the rapier device according to the invention may be used both on single rapier weaving machines and multiple rapier weaving machines.

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

Claims (6)

  1. Dispositif de transfert de trame à griffes pour un métier à tisser, comprenant une griffe porteuse (2) conçue pour présenter un fil de trame (3) à une griffe tireuse (1) conçue pour saisir le fil de trame (1), caractérisé en ce que la griffe porteuse (2) et/ou la griffe tireuse (1) est (sont) pourvue(s) d'un moyen pour créer une force d'attraction magnétique entre les deux griffes (1, 2) dans une zone de transfert.
  2. Dispositif de transfert de trame à griffes selon la revendication 1, caractérisé en ce que ledit moyen comprend un aimant permanent (4) ou un actionneur magnétique.
  3. Dispositif de transfert de trame à griffes selon l'une quelconque des revendications 1 ou 2, caractérisé en ce qu'une griffe est pourvue d'un aimant permanent ou d'un actionneur magnétique, alors que l'autre griffe est constituée au moins partiellement d'une matière qui peut être attirée par l'aimant ou l'actionneur.
  4. Dispositif de transfert de trame à griffes selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif est conçu pour établir un contact entre les deux griffes (1, 2), lorsque les griffes sont situées dans la zone de transfert, l'une à côté de l'autre, au moins partiellement, le contact étant la conséquence de ladite force d'attraction.
  5. Dispositif de transfert de trame à griffes selon l'une quelconque des revendications 1 à 4 incluse, caractérisé en ce que le chemin de déplacement de la griffe porteuse (2) et de la griffe tireuse (1) a été déterminé de telle sorte que la griffe porteuse (2) et la griffe tireuse (1) dans la zone de transfert adopteront une position de transfert, dans laquelle les griffes (1, 2) sur leur chemin respectif seront situées, au moins partiellement, l'une à côté de l'autre, et en ce que le dispositif est conçu pour créer une force d'attraction magnétique entre les deux griffes (1, 2) lorsque les griffes (1, 2) sont situées dans la zone de transfert.
  6. Dispositif de transfert de trame à griffes selon la revendication 5, caractérisé en ce que la position de transfert est atteinte sans aucun contact mutuel préalable entre les griffes (1, 2) et entre la griffe tireuse (1) et le fil de trame (3).
EP20040076382 2003-05-20 2004-05-10 Procédé et dispositif de transfert de trame d'une griffe porteuse à une griffe tireuse Expired - Lifetime EP1479808B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2003/0306A BE1015528A3 (nl) 2003-05-20 2003-05-20 Werkwijze en inrichting voor het overnemen van een inslaggaren door een nemergrijper van een gevergrjper.
BE200300306 2003-05-20

Publications (3)

Publication Number Publication Date
EP1479808A2 EP1479808A2 (fr) 2004-11-24
EP1479808A3 EP1479808A3 (fr) 2005-11-09
EP1479808B1 true EP1479808B1 (fr) 2006-06-21

Family

ID=33034886

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040076382 Expired - Lifetime EP1479808B1 (fr) 2003-05-20 2004-05-10 Procédé et dispositif de transfert de trame d'une griffe porteuse à une griffe tireuse

Country Status (3)

Country Link
EP (1) EP1479808B1 (fr)
BE (1) BE1015528A3 (fr)
DE (1) DE602004001289T2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2829646B1 (fr) 2013-07-24 2017-09-06 STÄUBLI BAYREUTH GmbH Système d'insertion de trame et machine à tisser comprenant de tel système
CN113293485B (zh) * 2021-05-26 2022-09-16 绍兴市嘉纬电子科技有限公司 一种高速耐磨型纺织剑头

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT993929B (it) * 1973-09-24 1975-09-30 Martinelli G Telaio perfezionato del tipo senza navetta
FR2737897B1 (fr) * 1995-08-18 1997-09-19 Icbt Diederichs Sa Dispositif pour l'insertion du fil de trame sur un metier a tisser a lances
FR2783842A1 (fr) * 1998-09-30 2000-03-31 Icbt Diederichs Sa Dispositif pour l'insertion du fil de trame
DE10134408A1 (de) * 2001-07-19 2003-02-06 Staeubli Gmbh Schussfadeneintragsorgan für Webmaschinen mit ortsfest angeordneten Vorratsspulen

Also Published As

Publication number Publication date
DE602004001289D1 (de) 2006-08-03
DE602004001289T2 (de) 2007-05-24
EP1479808A3 (fr) 2005-11-09
EP1479808A2 (fr) 2004-11-24
BE1015528A3 (nl) 2005-05-03

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