EP1262436B1 - Dispositif de fixation rapide pour des systèmes de freinage des fournisseurs de trame pour métiers à tisser - Google Patents

Dispositif de fixation rapide pour des systèmes de freinage des fournisseurs de trame pour métiers à tisser Download PDF

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Publication number
EP1262436B1
EP1262436B1 EP20020008614 EP02008614A EP1262436B1 EP 1262436 B1 EP1262436 B1 EP 1262436B1 EP 20020008614 EP20020008614 EP 20020008614 EP 02008614 A EP02008614 A EP 02008614A EP 1262436 B1 EP1262436 B1 EP 1262436B1
Authority
EP
European Patent Office
Prior art keywords
slide
quick
fastening device
support
ring
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
EP20020008614
Other languages
German (de)
English (en)
Other versions
EP1262436A1 (fr
Inventor
Pietro Zenoni
Giovanni Pedrini
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.)
LGL Electronics SpA
Original Assignee
LGL Electronics 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 LGL Electronics SpA filed Critical LGL Electronics SpA
Publication of EP1262436A1 publication Critical patent/EP1262436A1/fr
Application granted granted Critical
Publication of EP1262436B1 publication Critical patent/EP1262436B1/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
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/364—Yarn braking means acting on the drum
    • D03D47/366—Conical

Definitions

  • the present invention is concerned with a quick-release fastening device for the braking assemblies of weft suppliers to weaving machines, particularly weaving looms, knitting machines and the like.
  • weft suppliers for weaving machines typically comprise a stationary cylinder on which a weft winding arm, that swivels around the cylinder, winds a plurality of thread loops forming a weft reserve.
  • the loops of the reserve unwind from the cylinder and are supplied to the loom through a terminal thread-guiding eyelet, under control of a braking unit having the task of keeping the tension of the unwinding thread substantially constant.
  • a monitoring system which receives signals sent by sensors arranged to check the integrity of the weft reserve, controls the motion of the rotating arm and restores the weft reserve while the loops unwind as they supply the loom.
  • the braking assembly typically comprises a support ring, bearing the braking means, which may be of any of several kinds.
  • braking means consisting of a crown of bristles radially projecting inwardly of the support ring, or braking means consisting of an assembly of metallic leaves supported by said ring and arranged along the generatrixes of a solid of revolution or, alternatively, braking means comprising a continuous truncated-cone member which is elastically suspended at the centre of said support ring and is pushed against the cylinder, the most suitable braking means being selected in dependence of the features of the thread under processing.
  • such braking means engage the bevelled end portion, or delivery portion, of the cylinder, on which the unwinding thread loops slide, by applying a predetermined and adjustable elastic pressure on the thread, which pressure may be modulated in dependence of the changes of the sliding speed of the thread.
  • a predetermined and adjustable elastic pressure on the thread, which pressure may be modulated in dependence of the changes of the sliding speed of the thread.
  • the support ring of the braking unit is removably fastened to a support slide that is axially movable with respect to the cylinder of the supplier by means of a screw-based adjustment system.
  • the above support ring is connected to the respective support slide by means of conventional fasteners, typically consisting of retaining bolts acting through an attachment foot of the ring and engaging threaded holes provided in said support slide.
  • conventional fasteners typically consisting of retaining bolts acting through an attachment foot of the ring and engaging threaded holes provided in said support slide.
  • the main object of the present invention is therefore to remove said drawback by providing a new quick-release fastening device for fastening the braking unit to the support slide, with the aims of considerably simplifying and easing the steps of fastening and releasing said braking unit and slide, and of assuring the rigidity and stability of the fastening device, so that it will be suitable as an advantageous replacement for the conventional fastening system.
  • Another important object of the present invention is to provide a fastening device allowing the braking unit to be angularly displaced, if required, around a rotation axis which is perpendicular to the axis of the cylinder; e. g., in order to ease the process of threading the supplier after accidental breaking of the thread during the weaving process.
  • this invention is based on the innovative concept of providing said support ring and support slide with keying members that constrain them to move along their mating plane.
  • a pair of magnetic fastening members having opposite polarities is used, said magnetic fastening members being placed one in front of the other and being borne by the support ring and by the support slide, respectively.
  • the keying members have a prismatic cross-section so that they also prevent the rotation of said ring with respect to the slide.
  • the keying members have a cylindrical cross-section so that they enable, with the specified aim, the relative rotation of the support ring with respect to the support slide; said relative rotation being around an axis that is perpendicular to said mating plane.
  • a weft supplier device 1 of a known kind comprises a stationary cylinder 2 on which a hollow weft-winding arm 3, swiveling around the cylinder, winds a plurality of thread loops (not drawn) to build up a weft reserve.
  • the loops of the reserve unwind from cylinder 2 and run through a thread-guide eyelet G, under control of a braking unit 4 having the task of keeping substantially constant the mechanical tension in the thread F being unwound.
  • the structure of the braking unit is outside the scope of the present invention.
  • a braking unit of a known kind comprising a ring support 5 bearing braking means consisting of a frustoconical member 6 which is elastically suspended at the centre of said support ring and is pushed into contact against stationary cylinder 2.
  • Support ring 5 is removably attached, by means of an attachment foot 5a, to a support slide 7 that is supported by an arm 8 of supplying device 1, which is arranged parallel to cylinder 2.
  • the slide is subjected - in order to regulate the pressure of braking means 6 against cylinder 2 - to an adjustment system comprising a screw 9 provided with a control knob, which screw is also arranged parallel to the axis of cylinder 2.
  • support ring 5 is provided with a quick-release fastening device which is sandwiched between its attachment foot 5a and support slide 7.
  • a quick-release fastening device comprises substantially a pair of keying members 11, 12 (Figg. 3 and 4), of which one is borne by attachment foot 5a, the other by slide 7.
  • Such members constrain the foot and the slide to move in their mating plane.
  • keying members 11, 12 have a prismatic cross-section so that they prevent a relative rotation of the ring with respect to the slide.
  • keying members 11' and 12' have a cylindrical cross-section so that they allow a relative rotation of support ring 5 with respect to support slide 7, around a rotation axis that is perpendicular to mating plane P.
  • said ring and slide, in contact with each other, are firmly attached by at least one pair of magnetic fastening members 13 and 14, having opposite polarities, which are placed one in front of the other and are borne by foot 5a of support ring 5 and by support slide 7, respectively.
  • said magnetic fastening members 13 and 14 consist of one or more pairs of high-performance permanent magnets such as the current Samarium/ Cobalt-based magnets and the like.

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

Claims (4)

  1. Dispositif de fixation à libération rapide destiné à une unité de freinage (4) de dispositifs d'amenée (1 ) de fils de trame de métiers à tisser, ladite unité de freinage comprenant un anneau de support (5) qui est fixé de manière détachable au moyen d'un pied de fixation (5a) sur un coulisseau de support (7) qui peut se déplacer axialement par rapport au cylindre (2) du dispositif d'amenée à l'aide d'un système d'ajustement (9) à vis, caractérisé en ce qu'il comprend deux éléments de calage (11, 12) dont l'un est soutenu par le pied de fixation (5a) de l'anneau et dont l'autre est soutenu par le coulisseau (7), qui fonctionnent comme moyens pour amener ledit anneau et ledit coulisseau à se déplacer dans leur plan d'ajustement (P) et en ce qu'il comprend en outre des éléments magnétiques de fixation (13 et 14) qui présentent des polarités opposées, dont l'un est soutenu par le pied (5a) de l'anneau de support (5) et dont l'autre est soutenu par le coulisseau de support (7) et qui ont pour tâche de fixer ledit anneau et ledit coulisseau en contact mutuel.
  2. Dispositif de fixation à libération rapide selon la revendication 1, caractérisé en ce que lesdits éléments de calage (11, 12) ont une section transversale prismatique, la rotation de l'anneau de support (5) par rapport au coulisseau de support (7) étant empêchée.
  3. Dispositif de fixation à libération rapide selon la revendication 1, caractérisé en ce que lesdits éléments de calage (11, 12) ont une section transversale cylindrique, la rotation de l'anneau de support (5) par rapport au coulisseau de support (7) autour d'un axe perpendiculaire à leur plan d'ajustement (P) étant possible.
  4. Dispositif de fixation à libération rapide selon les revendications 2 ou 3, caractérisé en ce que les éléments magnétiques de fixation sont constitués d'au moins deux aimants permanents (13, 14) qui sont placés l'un en face de l'autre et qui ont des polarités opposées.
EP20020008614 2001-06-01 2002-04-17 Dispositif de fixation rapide pour des systèmes de freinage des fournisseurs de trame pour métiers à tisser Expired - Lifetime EP1262436B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20010080 ITTO20010080U1 (it) 2001-06-01 2001-06-01 Dispositivo di collegamento e sgancio rapidi del gruppo frenante negli alimentatori di trama a macchine tessili.
ITTO20010080 2001-06-01

Publications (2)

Publication Number Publication Date
EP1262436A1 EP1262436A1 (fr) 2002-12-04
EP1262436B1 true EP1262436B1 (fr) 2005-03-23

Family

ID=11458470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020008614 Expired - Lifetime EP1262436B1 (fr) 2001-06-01 2002-04-17 Dispositif de fixation rapide pour des systèmes de freinage des fournisseurs de trame pour métiers à tisser

Country Status (3)

Country Link
EP (1) EP1262436B1 (fr)
DE (1) DE60203338T2 (fr)
IT (1) ITTO20010080U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018115604A1 (de) 2018-06-28 2020-01-02 Memminger-Iro Gmbh Fadenliefergerät

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112623860B (zh) * 2020-12-25 2022-04-01 南通大学 一种用于临时收储工业线缆的储线设备

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9015048U1 (fr) * 1990-11-02 1992-02-27 Sobrevin Societe De Brevets Industriels-Etablissement, Vaduz, Li
IT1280434B1 (it) * 1995-07-18 1998-01-20 Lgl Electronics Spa Dispositivo elettropneumatico perfezionato per l'infilaggio automatico di apparecchi alimentatori di trama ed alimentatore di

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018115604A1 (de) 2018-06-28 2020-01-02 Memminger-Iro Gmbh Fadenliefergerät

Also Published As

Publication number Publication date
DE60203338D1 (de) 2005-04-28
DE60203338T2 (de) 2005-09-15
ITTO20010080U1 (it) 2002-12-02
ITTO20010080V0 (it) 2001-06-01
EP1262436A1 (fr) 2002-12-04

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