EP0129812B1 - Dispositif pour guider et freiner le fil de trame à l'entrée de la foule dans un métier à tisser sans navette - Google Patents

Dispositif pour guider et freiner le fil de trame à l'entrée de la foule dans un métier à tisser sans navette Download PDF

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Publication number
EP0129812B1
EP0129812B1 EP84106919A EP84106919A EP0129812B1 EP 0129812 B1 EP0129812 B1 EP 0129812B1 EP 84106919 A EP84106919 A EP 84106919A EP 84106919 A EP84106919 A EP 84106919A EP 0129812 B1 EP0129812 B1 EP 0129812B1
Authority
EP
European Patent Office
Prior art keywords
counterblade
weft
length
elastic element
gripper
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
EP84106919A
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German (de)
English (en)
Other versions
EP0129812A3 (en
EP0129812A2 (fr
Inventor
Nello Pezzoli
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.)
Vamatex SpA
Original Assignee
Vamatex SpA
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Filing date
Publication date
Application filed by Vamatex SpA filed Critical Vamatex SpA
Priority to AT84106919T priority Critical patent/ATE54963T1/de
Publication of EP0129812A2 publication Critical patent/EP0129812A2/fr
Publication of EP0129812A3 publication Critical patent/EP0129812A3/en
Application granted granted Critical
Publication of EP0129812B1 publication Critical patent/EP0129812B1/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
    • D03D47/12—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
    • D03D47/125—Weft holding devices
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/70—Devices for cutting weft threads

Definitions

  • This invention concerns a guiding and braking device to improve weft yarn insertion at the inlet of the shed in gripper looms.
  • a setting of the cutting times and of the gripper retaining means which may be acceptable for a certain type of yarn, is not suitable for other types of yarns, while the use of yarns having an irregular count prevents proper working when said irregularity is present in the gripping and cutting phase and area.
  • the present invention concerns a device to improve the insertion of the weft yarn in the carrying gripper of gripper looms equipped with a weft cutting device having a movable blade and a fixed counterblade aligned generally in the weft path direction, said device providing to guide and brake the weft yarn at the inlet of the shed, between the already formed fabric and the carrying gripper, at the moment in which said gripper engages said weft yarn and carries it therewith, characterized in that it comprises an elastic element applied to the weft cutting device of the loom and having a length which presses on a first portion of the counterblade of said cutting device, the weft yarn being pulled between said length of the elastic element and the counterblade by the weft carrying gripper as it enters the shed, and in that the counterblade has a second portion extending beyond the first portion in the direction of insertion of the weft, which second portion is not pressed by the elastic element.
  • the weft yarn t just tied to the fabric T being formed on the loom passes through a known-type cutting device C which has to perform the cutting thereof, before being engaged by the carrying gripper P (drawn in dashed lines in its position preceding insertion in the shed).
  • an elastic element 2 - formed, in this embodiment, as a metal strap - is applied to said cutting device C, of which only the counterblade 1 is shown.
  • said metal strap 2 comprising a first substantially vertical length 3, for connection to the cutting device C and adjustment in respect thereof. and a second V-shaped length 4 following downward the first length 3.
  • the metal strap 2 is fixed to the cutting device C by being inserted into an appropriate seat and locked therein by a pair of pressure screws 5 with horizontal axis, after having adjusted its position in height by way of the upper screw 6 with vertical axis which retains, between its head and a nut 7, the upper square-bent end 8 of said metal strap 2.
  • the apex of the V-shaped length 4 of the metal strap 2 elastically bears onto the counterblade 1 of the cutting device C with a pressure depending on the position in height of the length 3 of said metal strap, which pressure can therefore be adjusted by acting on the screw 6.
  • the weft yarn t passes through the cutting device C engaging the counterblade 1 externally to the strap 2. It is hence guided and braked by the V-shaped length 4 of said strap 2, which is elastic and resilient.
  • the elastic element is in the form of a wire 2A and comprises a first length 9, substantially parallel to the counterblade 1, and a second length 10 formed as a hook, an intermediate part 11 of which engages with the counterblade 1, pressing against the working surface thereof.
  • Said wire 2A is adjustably fixed to the cutting device C by means of a connection plate 12.
  • the adopted arrangement causes the weft yarn to remain permanently stretched and to take up the cutting and gripping positions most suited for the operation; it eliminates all motion relative to the cutting device, onto which is fixed the elastic element (2, 2A), so as to require no kinematic motion and to exclude any tension variations deriving from movements in respect of the cutting member; it lets free the small weft yarn tail attached to the fabric; it is self-cleaning because the weft yarn passage removes all impurity; it introduces no inertias on the yarn (as it has no motion of its own and it operates merely in function of elastic deformations, which vary according to the weft yarn count and adapt themselves thereto); and it allows a very wide range of adjustments.
  • the elastic elements 2 and 2A are preferably in the form of a metal strap and of a wire, as shown in the drawing. It is however understood that they could also be made in other forms. Also the mounting and adjustment of the elastic elements 2 or 2A, in respect of the cutting device C, could differ from those illustrated, which have been given by mere way of example.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Claims (4)

1. Dispositif dans un métier à pinces pour améliorer l'insertion du fil de trame (t) dans la pince de transport (P) des métiers à pinces dotés d'un dispositif de coupe de trame comportant une lame mobile et une contre-lame fixe alignée généralement dans le sens du trajet de la trame, ledit dispositif servant à guider et freiner le fil de trame (t) à l'entrée de la foule, entre le tissu déjà formé (T) et la pince de transport (P), au moment où ladite pince engage ledit fil de trame et le transporte avec elle, caractérisé en ce que ledit dispositif comprend un élément élastique (2, 2A) appliqué sur le dispositif de coupe de trame du métier et comportant une longueur (4, II) qui appuie sur une première portion de la contre- lame (1) dudit dispositif de coupe, le fil étant tiré entre ladite longueur (4, II) de l'élément élastique (2, 2A) et la contrelame (1) par la pince de transport de trame (P) alors qu'elle entre dans la foule, et en ce que la contre-lame (1) comprend une seconde portion s'étendant au-delà de la première portion dans le sens d'insertion de la trame, laquelle seconde portion n'est pas appuyée par l'élément élastique (2, 2A).
2. Dispositif selon la revendication 1, dans lequel l'élément élastique (2, 2A) est appliqué sur le dispositif de coupe par l'intermédiaire d'une paire de vis de pression (5) à axe horizontal et est réglable en hauteur au moyen d'une vis (6) à axe vertical.
3. Dispositif selon la revendication 1, dans lequel l'élément élastique est formé comme une patte métallique (2) comportant une longueur substantiellement verticale (3) le raccordement et le réglage, et une longueur en V opérante (4) appuyant avec sa portion intermédiaire sur la contre-lame (1).
4. Dispositif selon la revendication 1, dans lequel l'élément élastique est formé comme un fil métallique (2A) comportant une première longueur (9) substantiellement parallèle à la contre- lame (1) et une seconde longueur se finissant en un crochet (10), une portion intermédiaire de ladite seconde longueur appuyant sur la contre- lame (1).
EP84106919A 1983-06-24 1984-06-18 Dispositif pour guider et freiner le fil de trame à l'entrée de la foule dans un métier à tisser sans navette Expired - Lifetime EP0129812B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84106919T ATE54963T1 (de) 1983-06-24 1984-06-18 Vorrichtung zum fuehren und bremsen des schussfadens beim eintritt des faches in eine schuetzenlose webmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2177983 1983-06-24
IT21779/83A IT1163596B (it) 1983-06-24 1983-06-24 Dispositivo di guida e di frenatura del filo di trama all'ingresso del passo in telai di tessitura senza navette

Publications (3)

Publication Number Publication Date
EP0129812A2 EP0129812A2 (fr) 1985-01-02
EP0129812A3 EP0129812A3 (en) 1987-01-07
EP0129812B1 true EP0129812B1 (fr) 1990-07-25

Family

ID=11186739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84106919A Expired - Lifetime EP0129812B1 (fr) 1983-06-24 1984-06-18 Dispositif pour guider et freiner le fil de trame à l'entrée de la foule dans un métier à tisser sans navette

Country Status (4)

Country Link
EP (1) EP0129812B1 (fr)
AT (1) ATE54963T1 (fr)
DE (1) DE3482802D1 (fr)
IT (1) IT1163596B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1011603A3 (nl) * 1997-12-11 1999-11-09 Picanol Nv Werkwijze en inrichting voor het controleren van een inslaginbreng bij een weefmachine.
EP0953664A1 (fr) * 1998-04-28 1999-11-03 Sulzer Rüti Ag Dispositif pour couper un fil de trame à insérer et système pour insérer un fil de trame avec un tel dispositif
EP1020550B1 (fr) * 1999-01-12 2004-07-21 Sultex AG Dispositif pour séparer un fil de trame devant être inséré dans une foule, ainsi que métier à tisser équipé d'un tel dispositif
DE59910006D1 (de) * 1999-01-12 2004-08-26 Sultex Ag Rueti Vorrichtung zum Abtrennen eines in ein Webfach einzutragenden Schussfadens und Webmaschine mit einer derartigen Vorrichtung
US8461078B2 (en) 2009-01-14 2013-06-11 Dow Agrosciences Llc Fungicidal compositions including hydrazone derivatives and copper
BE1022855B1 (nl) * 2013-10-24 2016-09-23 Nv Michel Van De Wiele Inrichting voor het afsnijden van inslaggaren gedurende het weven op een weefmachine en weefmachine voorzien van een dergelijke inrichting
IT201800003084A1 (it) * 2018-02-27 2019-08-27 Itema Spa Dispositivo di taglio dei fili di trama in un telaio tessile a pinze senza formazione di falsa cimossa

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942732A (en) * 1975-01-20 1976-03-09 Russell Corporation Thread cutter for winding machines and the like
GB2014112B (en) * 1977-12-05 1982-04-28 Yamada M Take up arrangement for tapelike material
AT369442B (de) * 1981-01-08 1982-12-27 Saurer Ag Adolph Schussfaden-speichervorrichtung an einer webmaschine

Also Published As

Publication number Publication date
IT8321779A0 (it) 1983-06-24
IT1163596B (it) 1987-04-08
EP0129812A3 (en) 1987-01-07
EP0129812A2 (fr) 1985-01-02
ATE54963T1 (de) 1990-08-15
DE3482802D1 (de) 1990-08-30

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