EP1020552B1 - Porte-fils pour métiers à tisser - Google Patents

Porte-fils pour métiers à tisser Download PDF

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Publication number
EP1020552B1
EP1020552B1 EP99125836A EP99125836A EP1020552B1 EP 1020552 B1 EP1020552 B1 EP 1020552B1 EP 99125836 A EP99125836 A EP 99125836A EP 99125836 A EP99125836 A EP 99125836A EP 1020552 B1 EP1020552 B1 EP 1020552B1
Authority
EP
European Patent Office
Prior art keywords
yarn carrier
loom
support bars
weaving looms
cylinders
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
EP99125836A
Other languages
German (de)
English (en)
Other versions
EP1020552A1 (fr
Inventor
Giuseppe Casarotto
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.)
Promatech SpA
Original Assignee
Promatech SpA
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 Promatech SpA filed Critical Promatech SpA
Publication of EP1020552A1 publication Critical patent/EP1020552A1/fr
Application granted granted Critical
Publication of EP1020552B1 publication Critical patent/EP1020552B1/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
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/06—Warp let-off mechanisms
    • 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
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/22—Back rests; Lease rods; Brest beams

Definitions

  • the present invention relates to a yarn carrier for weaving looms which is constructed so as to allow more efficient supporting of the warp yarns and improved compensation of the tension thereof, when the looms are equipped with a single beam or, respectively, with several beams arranged alongside each other.
  • EP 0 204 233 A discloses a yarn carrier according to the preamble of claim 1, that in weaving looms which produce double-width fabric, or, in any case, in looms which are very long, the fabric may consist of two separate or attached pieces, with the warp yarns which are unwound from two separate beams arranged alongside each other, in which case the yarn-carrying cylinder essentially consists of a pair of idle cylinders oscillating with respect to a fixed axis and supported in the middle of the loom as well as on the two external shoulders.
  • the fabric may consist of a single piece, with the warp yarns unwound from a single beam, or two "twin" beams arranged alongside each other, in which case the yarn-carrying cylinder essentially consists of a single idle cylinder oscillating with respect to a fixed axis and supported at the two ends of the shoulders of the weaving loom.
  • the moment of inertia of the yarn-carrying cylinder has a negative effect, which is proportional to the length of the loom or to the horizontal distance between the two side levers supporting the cylinder itself, since with a high moment of inertia it is not possible to limit the cylinder deflection induced by the load of the yarns.
  • the yarn-carrying cylinders thus constructed therefore have the defect of negatively influencing the weaving process by introducing, on the warp yarns, tension peaks which cause continuous breakage of the yarns themselves on account of the high moment of inertia both during rotation of the cylinders about their longitudinal axis and during their oscillation with respect to their fixed axis.
  • the present invention now aims to solve the abovementioned problem by providing the yarn carrier with a configuration which is extremely versatile for the purposes of supporting the yarns and compensating the tension thereof and thus favouring uniform intertwining between weft and warp over the whole length of the loom.
  • the invention relates to a yarn carrier which is suitable for a double-width and two-piece loom, but may be adapted, if necessary, for the production of a single piece.
  • the invention solves the problem posed by means of a yarn carrier for weaving looms over which the warp yarns supplied by one or more beams and directed towards the fabric forming zone of the loom pass consisting of at least two adjacent cylinders with the same diameter, characterized in that said cylinders are mounted idle on a respective support bar, the axis of which is parallel to and at a distance from the fixed axis of oscillation of the yarn carrier; in that said support bars are mounted oscillating on said axis by means of pairs of levers which are pivotably mounted on fixed supports of the loom and in that said support bars may be locked together in rotation.
  • elements for deviating the warp yarns at the adjacent ends of said cylinders are also provided.
  • the yarn carrier comprises a pair of cylinders which are respectively connected to the resilient reaction system present on each side of the loom, the corresponding support bars of which may or may not be locked in rotation by means of a removable joint, preferably of the flanged type with a screw-type connection, which is located in the middle of the loom.
  • the yarn carrier according to the invention consists, in the embodiment shown, of a pair of external cylinders 1a, 1b over each of which the yarns F unwound from the beams 2a, 2b of the loom travel and which are operated in a known manner by the unwinding device 3a, 3b.
  • Each cylinder 1a, 1b of the yarn carrier 3a, 3b is mounted idle on a respective support bar 4a, 4b mounted parallel to and at a distance from the axis 7 of oscillation of the yarn carrier by means of pairs of levers, 5a, 5b, on the outer sides of the loom and, 6a, 6b, close to the middle of the loom itself, respectively.
  • the support bars 4a and 4b are arranged alongside each other and the levers 5a, 5b and 6a, 6b are pivotably mounted on the loom by means of suitable supports.
  • the support bars 4a, 4b are also connected to the resilient reaction system 8a, 8b arranged on the sides of the loom, at the end of each support bar 4a, 4b.
  • the side levers 5a, 5b are pivotably mounted on the loom in a known manner, whereas the levers 6a, 6b in the centre of the loom are mounted, oscillating about the axis 7, on a support of the fixed structure of the loom and may be joined together in a permanent or removable manner by means of a joint 10 (see Fig. 2).
  • Said joint may be provided, instead of between the levers 6a and 6b, as shown in Fig. 2, directly between the support bars 4a and 4b, in accordance with the embodiment shown in Fig. 3: in this case the flanged solution with fixing screws is compact, with the advantage of a smaller deviation of the yarns, which in any case must be provided, in accordance with the invention, between each cylinder of the yarn carrier, i.e. in the example illustrated, in the middle of the loom.
  • Fig. 3 shows how, in the region of the joint between the two adjacent portions of the yarn carrier, deviation elements 11 for the yarns are provided integral with the fixed structure of the loom or, alternatively, with the levers 6a, 6b.
  • the yarn carrier according to the invention may comprise - as already indicated - three or more adjacent cylinders, mounted idle on respective support bars, which may be locked together in rotation, so as to transmit the twisting torque between each bar and the adjacent bars.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Warping, Beaming, Or Leasing (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)

Claims (6)

  1. Porte-fils pour métiers à tisser sur lequel les fils de chaíne distribués par une ou plusieurs ensouples et dirigés vers la zone de formation d'étoffe du métier passent, consistant en au moins deux cylindres adjacents du même diamètre (1a, 1b), caractérisé en ce que lesdits cylindres (1a, 1b) sont montés libres sur une barre de support respective (4a, 4b), dont l'axe est parallèle à, et à une distance de, l'axe fixe d'oscillation (7) du porte-fils ; en ce que lesdites barres de support (4a, 4b) sont montées oscillantes sur ledit axe (7) au moyen de paires de leviers (5a, 5b et 6a, 6b) qui sont montés en pivotement sur des supports fixes du métier, et en ce que lesdites barres de support (4a, 4b) peuvent être rendues solidaires en rotation.
  2. Porte-fils pour métiers à tisser selon la revendication 1, dans lequel des éléments (11) pour dévier les fils de chaíne (F) sont situés dans la région des extrémités adjacentes desdits cylindres (1a, 1b).
  3. Porte-fils pour métiers à tisser selon la revendication 1, du type à ensouple double à double-largeur, dans lequel le porte-fils comprend une paire de cylindres (1a, 1b) respectivement reliés au système de réaction élastique (8a, 8b) présent sur chaque côté du métier, dont les barres de support correspondantes (4a, 4b) peuvent être ou non rendues solidaires en rotation au moyen d'un joint amovible (10), de préférence du type à bride avec une connexion par vis, situé au centre du métier.
  4. Porte-fils pour métiers à tisser selon la revendication 1, dans lequel lesdites barres de support (4a, 4b) sont rendues solidaires en rotation au moyen de joints amovibles (10).
  5. Porte-fils pour métiers à tisser selon la revendication 4, dans lequel lesdits joints (10) opèrent directement entre les barres de support (4a, 4b).
  6. Porte-fils pour métiers à tisser selon la revendication 4, dans lequel lesdits joints (10) opèrent entre lesdits leviers de montage (6a, 6b).
EP99125836A 1998-12-23 1999-12-23 Porte-fils pour métiers à tisser Expired - Lifetime EP1020552B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1998MI002811A IT1303655B1 (it) 1998-12-23 1998-12-23 Portafili per telai di tessitura
ITMI982811 1998-12-23

Publications (2)

Publication Number Publication Date
EP1020552A1 EP1020552A1 (fr) 2000-07-19
EP1020552B1 true EP1020552B1 (fr) 2002-10-02

Family

ID=11381335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99125836A Expired - Lifetime EP1020552B1 (fr) 1998-12-23 1999-12-23 Porte-fils pour métiers à tisser

Country Status (5)

Country Link
EP (1) EP1020552B1 (fr)
AT (1) ATE225422T1 (fr)
DE (1) DE69903249T2 (fr)
ES (1) ES2183474T3 (fr)
IT (1) IT1303655B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101956285B (zh) * 2010-09-29 2011-12-14 常州市第八纺织机械有限公司 托布装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1207056B (it) * 1985-05-31 1989-05-17 Vamatex Spa Dispositivo svolgitore di subbi d'ordito gemelli in telai di tessitura.

Also Published As

Publication number Publication date
DE69903249D1 (de) 2002-11-07
EP1020552A1 (fr) 2000-07-19
ATE225422T1 (de) 2002-10-15
ITMI982811A1 (it) 2000-06-23
ES2183474T3 (es) 2003-03-16
IT1303655B1 (it) 2001-02-21
DE69903249T2 (de) 2003-07-03

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