EP1735227B1 - Dispositif d'alimentation en fil - Google Patents

Dispositif d'alimentation en fil Download PDF

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Publication number
EP1735227B1
EP1735227B1 EP05739420A EP05739420A EP1735227B1 EP 1735227 B1 EP1735227 B1 EP 1735227B1 EP 05739420 A EP05739420 A EP 05739420A EP 05739420 A EP05739420 A EP 05739420A EP 1735227 B1 EP1735227 B1 EP 1735227B1
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EP
European Patent Office
Prior art keywords
rod
yarn feeder
finger
segment
guiding surfaces
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
EP05739420A
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German (de)
English (en)
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EP1735227A1 (fr
Inventor
Gerardo Salton
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.)
Iro AB
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Iro AB
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Publication of EP1735227A1 publication Critical patent/EP1735227A1/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
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/362—Drum-type weft feeding devices with yarn retaining devices, e.g. stopping pins

Definitions

  • the invention relates to a yarn feeder according to the preamble part of claim 1.
  • measuring yarn feeders particularly designed for use at jet weaving machines like air jet weaving machines and water jet weaving machines exist.
  • the insertion device of a jet weaving machine is unable to measure the correct yarn length for a pick.
  • the measuring yarn feeder is equipped with a stopping device for releasing a certain full number of yarn windings only during each pick.
  • the weaving width of an air jet machine can vary.
  • the diameter of the storage body is variable in order to match the length of.the yarn released by the stopping device during each pick with the weaving width (variable diameter storage body).
  • the storage body of measuring yam feeders conventionally comprises several separate segments which are held by rods in radial guidances of a support body of the yarn feeder.
  • Each segment may comprise several essentially axially extending, circumferentially separated fingers and a common rod.
  • a separating segment is loosely integrated into each stationary segment of the storage body.
  • the separating segment is held by a rod in a separating support body of the yarn feeder.
  • the separating support body wobbles during operation of the yam feeder such that the fingers of the separating segments convey the yarn windings on the stationary segments in withdrawal direction and separate the windings from each other.
  • Each segment is locked in an adjusted position by an integrated clamping device of the yarn feeder pressing the rod of the segment into the guidance of the support body.
  • the clamping device For changing the adjustment position the clamping device is temporarily untightened such that the rods can be radially displaced by an adjustment drive engaging at the engagement elements provided at the front side of the rod. Due to unavoidable vibrations during the operation of the yarn feeder the junction region in each segment is prone to damage and the free end portion of the segment tends to vibrate considerably when a diameter of the storage body is adjusted which is bigger than the minimum diameter, because then a significant part of the length of the rod is no longer supported by the guidance in the support body. Those drawbacks result from the design of conventional segments, particularly in the junction region and of the guiding surfaces of the rod and in the guidance.
  • Figs 6-9 illustrate a conventional segment design.
  • the segment consists of several fingers F' each defining a yam storage surface 2'.
  • a rod R' of essentially rectangular cross-section is unitarily connected to the finger F' in a junction region 1'.
  • the junction region 1' is stiffened by a gusset 5' at the junction between a front side 8' of the rod R' and the lower side of the finger F'.
  • the front side 8' carries engagement elements 3', while the rear side of the rod R has longitudinally extending grooves 6'.
  • Side surfaces 14' and the surfaces in the grooves 6' constitute longitudinal guiding surfaces G' of the rod R' which guiding surfaces G' co-act with longitudinal guiding surfaces 7' of a support body B' of the yarn feeder.
  • a symbolically shown clamping device K generates a clamping force which is oriented essentially perpendicular to the front side 8' of the rod R'.
  • the junction region not only is stiffened towards the front end portion of the segment but also towards the rear end portion of the segment, the junction region is very rigid. Vibrations occurring during operation of the yarn feeder as well as the forces of the yarn windings carried by the segments hardly can cause oscillating motions of the fingers even when a bigger diameter is adjusted than the minimum diameter of the storage body, and provided that the rod is well guided and supported in the guidance of the support body.
  • the guiding quality of the rod in the guidance of the support body is enhanced by the V-arrangement of the guiding surfaces and the co-action of the guiding surfaces with mating guiding surfaces in the guidance.
  • the V-arrangement results in an intensified securement of the rod by the clamping force of the clamping device, because oblique surfaces are firmly pressed against each other, and because the V-arrangement of the guiding surfaces leads to larger contact areas.
  • the guiding surfaces in the V-arrangement, seen in a cross-section of the rod may be designed relatively long resulting in a material concentration at the rear side of the rod which increases the moment of inertia and the bending stiffness of the rod such that the not supported longitudinal section of the rod (in the case of a large diameter adjustment) is unable to flex.
  • Both measures in combination improve the resistance of the segment against breakages in the junction region and suppress any tendency of the fingers to vibrate, practically in all directions in relation to the stationary part of the yarn feeder.
  • the operation performance of the yarn feeder is improved significantly.
  • the modifications needed at the segment and for the guidances are simple. A large adjustment range can be achieved despite the increased stiffness in the junction region.
  • At least one pair of guiding surfaces is provided in the rear side of the rod which guiding surfaces converge in a direction from the rear side towards the front side.
  • even two pairs of V-shaped guiding surfaces are defined in the rear side of the rod with a longitudinal rib in-between.
  • the structure multiplies the guiding surfaces such that a large contact area is achieved.
  • the longitudinal rib improves the bending stiffness of the rod and may even be continued into the additional gusset at the rear side.
  • the longitudinal central rib even is higher for stiffness purposes than the ribs created at both sides of the rod.
  • the strengthened segment is a segment of the stationary storage body and is clamped by the clamping device in the guidance of the stationary support body.
  • the clamping force is acting essentially perpendicular to the front side of the rod such that the converging guiding surfaces are brought into firm contact with the guidance.
  • the segment may be a separating segment which can be driven for a wobbling motion in relation to the stationary storage body segments.
  • the yarn feeder W is a so-called measuring yam feeder as conventionally applied at jet weaving machines.
  • the yarn feeder W has a housing 10 stationarily supporting a storage body 13.
  • a stopper housing 11, fixed to the housing 10, is structurally associated to the outer circumference of the storage body 13 at a circumferential location of one segment S of totally e.g. four at least substantially identical segments S regularly distributed in circumferential direction of the storage body 13.
  • Each segment S consists of several essentially parallel fingers F, each of which is constituting a yam storage surface 2, and of a rod R extending essentially perpendicular to the lower side of the central finger F.
  • Each rod R serves for the fixation and radial adjustment of one segment S in relation to a support body B which is stationarily supported in relation to the housing 10.
  • a winding element 12 is provided between the storage body 13 and the housing 10 and can be driven in order lay down yam windings on the storage body 13.
  • the yarn feeder W could be equipped with a storage body 13 only consisting of the stationary segments S.
  • the yarn feeder operates with yarn separation.
  • additional segments SA are provided which are positioned with axial fingers FA in the interspaces between the fingers F of the stationary segments S.
  • the segments SA are so-called separating segments and can be driven for a wobbling motion in relation to the stationary segments S:
  • Each segment SA is fixed by a rod RA which is unitarily connected to one of the fingers FA at the lower side and extends into a support body BA which wobbles when the yarn feeder is operating (conventional technique).
  • the storage body 13 contains an adjusting device (not shown) and a clamping device (not shown), both for either adjusting the radial position of each rod R, RA in relation to the axis of the storage body 13 or to lock the respective rods R, RA as soon as a selected radial adjustment position has been set.
  • the stopper housing 11 as well may be adjustable in radial direction.
  • Figs 2-5a illustrate embodiments of a segment S for the yarn feeder W of Fig. 1 .
  • the segment S has design features according to the invention.
  • Figs 2-5a represent one of the stationary segments S of Fig. 1 , e.g. the lowermost segment in Fig. 1 .
  • the design features according to the invention could also be implemented into the segments SA, which by their wobbling motion co-act with the stationary segments S in order to convey the yam windings in Fig. 1 from the right side in axial direction to the left and in order to, furthermore, produce a yarn separation of a selectable extent between the yarn windings.
  • the segment S in Fig. 2 consists of five essentially parallel fingers F with axial interspaces between adjacent fingers F.
  • the fingers F are interconnected at their front and rear end portions.
  • the central finger F is somewhat broader than the other fingers F.
  • Each finger F constitutes a yarn storage surface 2 by its upper periphery.
  • the rod R of the segment S is unitarily connected to the central finger F in a junction region 1.
  • the rod R is essentially as broad as the finger F.
  • gussets 5a and 5b are provided at the transition between the front surface 8 of the rod R and the lower side of the central finger F and at the transition between the rear side (not visible in Fig. 2 ) of the rod R and the lower side of the central finger F in order to increase the bending stiffness and the torsional stiffness in the junction region 1.
  • the front surface 8 carries engagement elements 3 which co-act in the yarn feeder with the not shown adjustment drive for longitudinally, i.e. radially, moving the rods R in relation e.g. to the axis of the storage body 13.
  • the rear side may be flat, or at least one longitudinal groove 6 may be formed in the rear side of the rod R.
  • a single longitudinal groove 6 is formed in the rear side.
  • the groove 6 has side flanks constituting longitudinal guiding surfaces G which converge in a direction from the rear side to the front side 8.
  • the side surfaces 14 of the rod R (in a cross-section as in Fig. 5 ) are planar and converge in a direction from the front side 8 towards the rear side.
  • a guidance 7 of trapezoidal cross-section in the support body B even may have, in case that the groove 6 is provided, a rib co-acting with the guiding surfaces G in the groove 6.
  • the clamping device K is indicated by an arrow illustrating the direction of the clamping force generated for locking the rod R in a selected adjustment position.
  • the force is essentially perpendicular to the front surface 8 of the rod R and presses the guide surfaces G into firm contact with the guide surfaces of the guidance 7.
  • the clamping device K is untightened the rod R can be displaced perpendicular to the drawing plane in Fig. 5 by co-action between the not shown adjustment drive and the engagement elements 3.
  • the junction region 1 is characterised by a massive material concentration in the front and rear gussets 5a, 5b and the relatively thick rod R (measured in the drawing plane in Fig. 3 ). Moreover, as indicated in dotted lines in Fig. 4 , even reinforcing rib sections 16 might be provided which form the side surfaces 17 of the finger F, and additionally stiffen the junction region 1.
  • the groove 6 in the rear side of the rod R is starting with a distance from the junction region 1 such that the full cross-section of rod R will be provided in the junction region 1.
  • Fig. 5a illustrates another embodiment of the cross-sectional design of the rod R according to the invention.
  • Both side surfaces 14 of the rod R define longitudinal and relatively broad guiding surfaces G.
  • the guiding surfaces G which are provided pairwise and symmetrically with respect to the central axis of the rod R, converge in a direction from the front surface 8 towards the rear surface of the rod R.
  • two pairs of longitudinally extending guiding surfaces G are formed by grooves such that in each pair the two guiding surfaces G converge in a direction from the rear side towards the front side 8.
  • a central longitudinal rib 18 is provided which e.g. is higher than the ribs forming the side surfaces 14.
  • the guidance (not shown in Fig. 5a ) has mating guiding surfaces for the co-action with the guiding surfaces G of the rod R.
  • the guidance and the locking function both mainly occur between the oblique guiding surfaces of the rod R and mating guiding surfaces of the guidance.
  • the segments S preferably are metallic die cast parts with a special wear resistant coating at least on the yarn storage surfaces 2 of the fingers F.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Looms (AREA)

Claims (7)

  1. Dispositif d'alimentation en fil (W) comprenant un corps de magasin fixe à diamètre variable (13) constitué de segments séparés (S, SA) qui sont reçus de manière réglable dans des organes de guidage radiaux (7) d'une structure de support (B), chaque segment comprenant au moins un doigt (F, FA) et une tige (R) formée d'une seule pièce avec le doigt (F), tige qui est reliée au côté inférieur du doigt dans une zone de jonction et s'étend pour l'essentiel perpendiculairement au côté inférieur de celui-ci, et qui porte des éléments d'accouplement (3) au niveau de son côté avant (8) et présente des surfaces de guidage s'étendant longitudinalement (G) au niveau de ses autres côtés, la zone de jonction (1) comprenant au moins au niveau d'une partie de transition entre le côté avant (8) et le côté inférieur du doigt un gousset intégré (5a), caractérisé en ce que la zone de jonction (1) est pourvue, dans une partie de transition depuis le côté arrière de la tige (R) jusque dans le côté inférieur du doigt (F, FA), d'un gousset supplémentaire (5b), et en ce que les surfaces de guidage (G) sont - en vue en coupe transversale de la tige (R) - disposées suivant une configuration en V par paires.
  2. Dispositif d'alimentation en fil selon la revendication 1, caractérisé en ce que les surfaces latérales (14) de la tige (R) définissent deux surfaces de guidage (G) qui convergent dans une direction orientée du côté avant (8) vers le côté arrière.
  3. Dispositif d'alimentation en fil selon la revendication 1, caractérisé en ce qu'au moins deux surfaces de guidage (G) convergeant dans une direction orientée du côté arrière de la tige vers le côté avant (8) sont prévues dans le côté arrière de la tige.
  4. Dispositif d'alimentation en fil selon la revendication 1, caractérisé en ce que le gousset supplémentaire (5b) comprend des parties formant nervures (16) qui définissent des parois latérales (17) du doigt (F), la hauteur de la partie formant nervure (16) augmentant dans une direction orientée vers la tige.
  5. Dispositif d'alimentation en fil selon la revendication 3, caractérisé en ce qu'une nervure longitudinale (18) est prévue dans le côté arrière de la tige (R) entre deux paires de surfaces de guidage en forme de V (G).
  6. Dispositif d'alimentation en fil selon la revendication 1, caractérisé en ce que le segment (S) est fixé dans chacune de positions de réglage différentes dans des organes de guidage fixes (7) du dispositif d'alimentation en fil (W) au moyen d'un dispositif de serrage (K) qui génère une force de serrage orientée sensiblement perpendiculairement au côté avant (8).
  7. Dispositif d'alimentation en fil selon la revendication 1, caractérisé en ce que le segment (SA) est fixé dans chacune de positions de réglage différentes dans des organes de guidage d'un corps de support oscillant (BA) par un dispositif de serrage générant une force de serrage qui est pour l'essentiel perpendiculaire au côté avant de la tige (RA).
EP05739420A 2004-04-15 2005-04-14 Dispositif d'alimentation en fil Active EP1735227B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0400993A SE0400993D0 (sv) 2004-04-15 2004-04-15 Garnmatare
PCT/EP2005/003955 WO2005100221A1 (fr) 2004-04-15 2005-04-14 Dispositif d'alimentation en fil

Publications (2)

Publication Number Publication Date
EP1735227A1 EP1735227A1 (fr) 2006-12-27
EP1735227B1 true EP1735227B1 (fr) 2008-07-16

Family

ID=32294329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05739420A Active EP1735227B1 (fr) 2004-04-15 2005-04-14 Dispositif d'alimentation en fil

Country Status (4)

Country Link
EP (1) EP1735227B1 (fr)
CN (1) CN100567116C (fr)
SE (1) SE0400993D0 (fr)
WO (1) WO2005100221A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1025268B1 (nl) * 2017-05-30 2019-01-07 Picanol N.V. Naamloze Vennootschap Inslagtoevoerinrichting met veerkrachtig gemonteerd drukelement

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1204330B (it) * 1986-04-30 1989-03-01 Sarfati & Vischiani Spa Dispositivo accumulatore per alimentatori di filo di trama a macchine tessili
IT1230562B (it) * 1988-10-14 1991-10-28 Roy Electrotex Spa Gruppo di avvolgimento della riserva di filo di trama a sviluppo di spira variabile regolabile con un intervento singolo, per l'uso in porgitrama-misuratori per telai di tessitura
IT1246421B (it) * 1990-08-03 1994-11-18 Roy Electrotex Spa Alimentatore di trama per telai di tessitura con gruppo di avvolgimento della riserva a sezione regolabile
JP3366243B2 (ja) * 1998-01-16 2003-01-14 津田駒工業株式会社 緯糸測長貯留装置におけるドラム径の設定装置
IT245848Y1 (it) * 1998-06-03 2002-03-26 Lgl Electronics Spa Perfezionamento ai mezzi di vincolo cedevole del sistema flottante diavanzamento delle spire della riserva di filato negli apparecchi
IT249345Y1 (it) * 2000-12-22 2003-04-14 Lgl Electronics Spa Alimentatore di trama perfezionato, particolarmente per telai di tessitura a getto di fluido.
NL1020412C2 (nl) * 2002-04-17 2003-10-20 Te Strake Textile B V Werkwijze voor het instellen van de diameter van het opwikkellichaam van een voorafwikkelinrichting alsmede een dergelijke voorafwikkelinrichting.
ITTO20020490A1 (it) * 2002-06-11 2003-12-11 Lgl Electronics Spa ,,alimentatore di trama per macchine tessili con dispositivo di separazione delle spire sul tamburo,,

Also Published As

Publication number Publication date
EP1735227A1 (fr) 2006-12-27
SE0400993D0 (sv) 2004-04-15
CN1950282A (zh) 2007-04-18
WO2005100221A1 (fr) 2005-10-27
CN100567116C (zh) 2009-12-09

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