EP3106555B1 - Métier à tisser à pinces avec dispositif pneumatique pour l'élimination d'erreurs de trajet du préhenseur de trame et procédé - Google Patents

Métier à tisser à pinces avec dispositif pneumatique pour l'élimination d'erreurs de trajet du préhenseur de trame et procédé Download PDF

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Publication number
EP3106555B1
EP3106555B1 EP16173466.0A EP16173466A EP3106555B1 EP 3106555 B1 EP3106555 B1 EP 3106555B1 EP 16173466 A EP16173466 A EP 16173466A EP 3106555 B1 EP3106555 B1 EP 3106555B1
Authority
EP
European Patent Office
Prior art keywords
gripper
loom
wrong
weft
air flows
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.)
Active
Application number
EP16173466.0A
Other languages
German (de)
English (en)
Other versions
EP3106555A1 (fr
Inventor
Fabio Rabolini
Diego Poletti
Roberto NAVA
Walter GUERINONI
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Itema SpA
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Itema SpA
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Publication of EP3106555A1 publication Critical patent/EP3106555A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
    • D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping
    • D03D51/085—Extraction of defective weft
    • 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
    • D03D47/24—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 by gripper or dummy shuttle
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/04—Auxiliary apparatus combined with or associated with looms for treating weft

Definitions

  • the present invention relates to a gripper weaving loom with a device for the removal of wrong wefts from the gripper path and to a method for the removal of wrong wefts that makes use of such a device.
  • the invention relates to a device as above which temporarily removes wrong wefts, outside the shed, during the stop transient of the loom as a result of the insertion of a wrong weft.
  • composition of the device for the removal of wrong wefts is particularly simple and includes an electrovalve 1, controlled by the loom control unit, to which a compressed-air supply 2 and a small tube for air distribution 3 are connected, respectively upstream and downstream, the small tube 3 having a series of holes 4 on its side surface, acting as nozzles for the emission of compressed-air jets.
  • the small tube 3 can be replaced with a specific channel, formed inside the carrying gripper guide G, wherein holes 4 are opened for the formation of the desired air jets.
  • the device operation is also particularly simple and effective.
  • the device program included into the loom central control unit provides that, when the loom central control unit detects the presence of a wrong weft, in addition to starting the usual loom stop procedure - which involves braking and stopping the grippers movement, in one/two cycles, and simultaneously deactivating the weft presenting machine so that said cycles are carried out idly, i.e. without insertion of wefts - the activation of the electrovalve 1 into the open position is also immediately controlled, so that a compressed air flow is ejected from the holes 4 of the small tube 3, causing a lifting action on the loose weft which is positioned in that area.

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

Claims (10)

  1. Métier à tisser à pinces avec un dispositif d'élimination de mauvaises trames du chemin de pince, le dispositif comprenant un ou plusieurs flux d'air comprimé commandés en ouverture et en fermeture par au moins une soupape (1), lesdits flux d'air comprimé étant agencés sur ledit métier dans une zone comprise entre les leviers de présentation de trame (F) et le bord du tissu en formation, caractérisé en ce que lesdits flux d'air comprimé sont orientés de sorte à former un jet d'air apte à déplacer la mauvaise trame verticalement loin d'un guide de pince porteuse (G).
  2. Métier à tisser à pinces selon la revendication 1, dans lequel lesdits flux d'air sont agencés près du guide de pince porteuse (G).
  3. Métier à tisser à pinces selon la revendication 2, dans lequel lesdits flux d'air sont éjectés par une pluralité d'ouvertures (4) prévues transversalement sur la paroi latérale d'un petit tube (3) alimenté axialement en air comprimé par l'intermédiaire d'une électrovanne (1) et associé au guide de pince porteuse (G) de sorte que lesdites ouvertures (4) soient tournées vers le haut.
  4. Métier à tisser à pinces selon la revendication 3, dans lequel lesdites ouvertures (4) sont alignées le long d'une ligne parallèle à l'axe du petit tube (3).
  5. Métier à tisser à pinces selon la revendication 3, dans lequel lesdites ouvertures (4) sont disposées en quinconce alternativement d'un côté et de l'autre par rapport à une ligne parallèle à l'axe du petit tube (3).
  6. Métier à tisser à pinces selon les revendications 3, 4 ou 5, dans lequel lesdites ouvertures consistent en trous ou fentes continu(e)s ou discret(e)s pour le passage de l'air.
  7. Métier à tisser à pinces selon la revendication 2, dans lequel lesdits flux d'air sont éjectés par une pluralité d'ouvertures prévues dans un canal du guide de pince porteuse (G).
  8. Procédé d'élimination des mauvaises trames du chemin de pince dans un métier à tisser à pinces, du type dans lequel une unité de commande centrale de métier lance une procédure d'arrêt rapide de métier lorsqu'une insertion de mauvaise trame est détectée, qui comprend en outre - simultanément ou immédiatement après le lancement de ladite procédure d'arrêt rapide de métier - l'activation d'un ou plusieurs flux d'air comprimé agencés sur ledit métier dans une zone comprise entre les leviers de présentation de trame (F) et le bord du tissu en formation, caractérisé en ce que lesdits flux sont orientés de sorte à former un jet d'air apte à déplacer la mauvaise trame verticalement loin d'un guide de pince porteuse (G).
  9. Procédé d'élimination des mauvaises trames selon la revendication 8, dans lequel l'activation desdits flux d'air comprimé dure au moins jusqu'à ce que la pince porteuse ait terminé sa course d'entrée dans la foule.
  10. Procédé d'élimination des mauvaises trames selon la revendication 9, dans lequel lesdits flux d'air comprimé proviennent de la proximité du guide de pince porteuse (G) - ou directement dudit guide (G) et sont dirigés vers le haut.
EP16173466.0A 2015-06-16 2016-06-08 Métier à tisser à pinces avec dispositif pneumatique pour l'élimination d'erreurs de trajet du préhenseur de trame et procédé Active EP3106555B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUB20151437 2015-06-16

Publications (2)

Publication Number Publication Date
EP3106555A1 EP3106555A1 (fr) 2016-12-21
EP3106555B1 true EP3106555B1 (fr) 2019-08-07

Family

ID=55358045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16173466.0A Active EP3106555B1 (fr) 2015-06-16 2016-06-08 Métier à tisser à pinces avec dispositif pneumatique pour l'élimination d'erreurs de trajet du préhenseur de trame et procédé

Country Status (3)

Country Link
EP (1) EP3106555B1 (fr)
JP (1) JP6856980B2 (fr)
CN (1) CN106256937B (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1093423A (zh) * 1993-04-07 1994-10-12 金刚铁工厂股份有限公司 自动除纬装置
JPH07133551A (ja) * 1993-11-09 1995-05-23 Tsudakoma Corp レピア織機における不良緯糸処理装置
FR2908426B1 (fr) * 2006-11-15 2009-05-29 Schonherr Textilmaschb Gmbh Dispositif d'insertion de trame,metier a tisser pour tapis equipe d'un tel dispositif et procede de traitement d'un defaut d'insertion de trame dans un tel metier
EP2230341A1 (fr) * 2009-03-18 2010-09-22 ITEMA (Switzerland) Ltd. Procédé et dispositif de stockage destiné au stockage de fils de trame dans un métier à tisser

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN106256937A (zh) 2016-12-28
JP2017036534A (ja) 2017-02-16
CN106256937B (zh) 2020-09-15
JP6856980B2 (ja) 2021-04-14
EP3106555A1 (fr) 2016-12-21

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