EP0321377A1 - Dispositif d'alimentation en fil pour des machines textiles - Google Patents

Dispositif d'alimentation en fil pour des machines textiles Download PDF

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Publication number
EP0321377A1
EP0321377A1 EP88500122A EP88500122A EP0321377A1 EP 0321377 A1 EP0321377 A1 EP 0321377A1 EP 88500122 A EP88500122 A EP 88500122A EP 88500122 A EP88500122 A EP 88500122A EP 0321377 A1 EP0321377 A1 EP 0321377A1
Authority
EP
European Patent Office
Prior art keywords
yarn
feed device
yarn guide
feed
feed member
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.)
Withdrawn
Application number
EP88500122A
Other languages
German (de)
English (en)
Inventor
Güell José Maria Dalmau
Miguel Gabarrós Montaner
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.)
Jumberca SA
TORRES Y CIA SA
Original Assignee
Jumberca SA
TORRES Y CIA SA
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 Jumberca SA, TORRES Y CIA SA filed Critical Jumberca SA
Publication of EP0321377A1 publication Critical patent/EP0321377A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/02—Rotary devices, e.g. with helical forwarding surfaces
    • B65H51/04—Rollers, pulleys, capstans, or intermeshing rotary elements
    • B65H51/08—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a yarn feed device for textile machines, of the type comprising an inlet yarn guide for receiving the yarn from a package, cone or like supply member; a feed member having a generally cylindrical side surface which may be engaged by the yarn extending from the inlet yarn guide; means for causing said feed member to rotate; an outlet yarn guide from which the yarn is supplied to a needle of a textile machine; a first intermediate yarn guide and at least one second inter­mediate yarn guide substantially adjacent said inlet yarn guide, such that the yarn extending from the inlet yarn guide to the first intermediate yarn guide and from the latter to the second intermediate yarn guide maintains at least one arc of tangency with the supply member which jointly are substantially smaller than the total perimeter of said member, the side surface of the feed member being adapted to pull the yarn engaging the surface in these arcs of tangency only when the yarn is under tension, on being required by the needle.
  • a feed device of the above type is disclosed in EP 0 252 866, (U.S. 4.754.936, Japan 62-154574) and provides satisfactory service, generally speaking.
  • the invention provides a feed device of the type described wherein the side surface of said feed member is provided with an annular region of upwardly widening diameter regularly engaged by the yarn to be fed such that when the yarn is subjected to tension it tends to climb up a short stretch of said portion.
  • the known yarn feed device provides for the arcs of tangency of the yarn with the side surface of the feed member to be constant. Therefore, the feed device does not allow any distinction to be made between yarns having different adherence characteristics relative to the feed member.
  • the invention allows this important differentiation of yarns of differing degrees of adherence to be set up and it is achieved in that said first intermediate yarn guide may be caused adjustably to rotate around the feed member, whereby it varies the length of said arc of tangency of the yarn with said feed member.
  • the first intermediate guide member is adjusted so as to provide a notable extension of the arc of tangency when feeding low adherence yarns and for said extension to be reduced as the adherence increases. This obviously leads to greater regularity in the feed, independently of the degree of adherence.
  • the feed device 1 comprises a frame 2 in which there is mounted a feed member 4 which is rotatable around a shaft 6.
  • the feed member 4 is coaxial with pulleys 8 which may be driven by a belt or like means (not shown); the mechanical connection between the pulley and the feed member causes the latter to rotate when the pulley 8 is driven.
  • the feed device 1 receives yarn 10 from a yarn package, cone or like member 13, not shown.
  • the yarn passes through an outermost yarn guide 12 and thereafter through a passage defined between two mutually facing discs 14, only the front one being visible in Figure 1.
  • the discs are adapted to detect any undesirable thickening or irregularity in the yarn 10.
  • the yarn passes to an inlet yarn guide 16 and a first sensor 18 is located in the yarn path from the discs 14 to the inlet yarn guide 16 to bear against the yarn 10, so that any breakage of the yarn is detected by the sensor.
  • first intermediate yarn guide 20 mounted on a vertical arm 22 of a support ring 24 which, in turn, is mounted on a mounting member 26 concentric with the feed member 4.
  • the mounting member 26 does not rotate with the feed member 4, although it may be rotated with stepless adjustment, as described hereinafter.
  • the yarn extends from the inlet yarn guide 16 and sensor 18 to the first intermediate yarn guide 20, holding itself tangential, along an arc of circumference, to the feed member 4. From said first intermediate yarn guide 20, the yarn extends to a second intermediate yarn guide 28 ( Figures 3 and 4) located adjacent the inlet yarn guide 16, possibly forming a further tangent with the feed member 4.
  • the second yarn guide 28 is located as shown in Figures 3 and 4. Where rotation is in the opposite direction, said second yarn guide referenced as 32, is located on the other side of the inlet yarn guide 16. As is logical, in this case the yarn 10 would surround the member 4 in the opposite direction to the one shown.
  • the yarn From the second intemediate yarn guide 28 (or, as the case may be, from the yarn guide 32), the yarn extends to a third intemediate yarn guide 34 and therefrom to an outlet yarn guide 36, such that said yarn 10 is located out of engagement with the feed member 4.
  • a second sensor 38 bears against the yarn in this last path to detect any yarn breakage.
  • the third intermediate yarn guide 34 is not required if the yarn has to extend of necessity remote from the feed member from the second yarn guide 28 (32) to the outlet yarn guide 36.
  • the yarn extends from the outlet yarn guide 36 to a needle, not shown, with the possible intervention of other mechanisms which need not be described for an understanding of the feed device of the invention.
  • the feed member 4 is provided with a side surface 40 adapted to pull the yarn in engagement therewith, when the yarn is placed under tension on being required by the needle.
  • the engagement between the surface 40 and the yarn 10 only takes place along the arcs of tangency as described above.
  • the length of said arcs is substantially smaller than the length of the circumference equivalent to the perimeter of the feed member.
  • the surface 40 may not be smooth polished metal, since there would be no adherence in this case and the yarn would slide over the surface 40 and there would be no feed.
  • the surface 40 be made of rubber, leather, synthetic elastomers, plastics or like materials.
  • the lateral surface 40 of the feed member 4 be metallic and be provided with striations, knurling or any other type of roughness. Under these conditions, there is the necessary adherence for pulling the yarn, although in certain cases the yarn may be damaged by contact with the hard metal surface or by any surface snag thereof.
  • the feed member 4 is rotating while the textile machine is running.
  • the needle does not require yarn
  • the latter is not under tension and therefore the tangential portions of the yarn 10 slide gently over the surface 40, without adhering thereto, whereby the yarn is not fed.
  • the needle requires yarn to knit
  • the yarn, and therewith the arcs of tangency is placed under tension, is forceably engaged with the member and thus the yarn is fed and the needle receives the yarn it needs.
  • this yarn feed is interrupted when the needle ceases to need yarn, since the tension is also released.
  • the annular region 42 preferably forms part of a concave portion 44, as shown. e.g., in Figure 1. Nevertheless, the concave portion may adopt diffetent forms, such as those illustrated as an example in Figures 5 to 9, where the annular region 42 is also seen to be ca­pable of forming part of a conical portion of the side surface 40.
  • the invention also contemplates that the feed member 4 be surrounded with a removable outer jacket 46, i.e. which may be removed when necessary, e.g. as a result of wear. Said jacket is seen in section in Figures 5 to 9.
  • the jacket 46 may also be mounted on a sleeve (not shown) which in turn may be mounted on the feed member 4.
  • the feed member is preferably a drum having a generally continuous side surface.
  • the invention also includes an embodiment in which the feed member is formed by two parallel discs 48, provided with axial rods 50 in the periphery thereof, distributed evenly in a circle. The side surfaces 52 of said rods replace, discontinuously, the continuous surface of said drum.
  • the said annular region of upwardly widening diameter is also to be found on the side surface of said rod.
  • the rods may be concavely formed as shown in Figure 10 or may adopt other forms of concavity or even be frustoconical.
  • Figure 3 shows a position of maximum yarn wrap, in which the arc of tangency between points A and B is greater.
  • Figure 4 shows the minimum wrap position showing arcs of tangency between points C and D and between points E and F, the sum of which is less than the curved length between A and B.
  • Adjustment may be readily effected by hand, depending on observations of the feed in each case.
  • the first yarn guide 20 is preferably formed by a ceramic cylinder, as shown in Figures 1 and 11, although it may have other suitable configurations, such as a closed eye (Figure 12), open eye (Figure 13) or other technically compatible forms.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
EP88500122A 1987-12-14 1988-12-09 Dispositif d'alimentation en fil pour des machines textiles Withdrawn EP0321377A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES8703558A ES2006240A6 (es) 1987-12-14 1987-12-14 Alimentador de hilo a maquinas textiles.
ES8703558 1987-12-14

Publications (1)

Publication Number Publication Date
EP0321377A1 true EP0321377A1 (fr) 1989-06-21

Family

ID=8253675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88500122A Withdrawn EP0321377A1 (fr) 1987-12-14 1988-12-09 Dispositif d'alimentation en fil pour des machines textiles

Country Status (3)

Country Link
EP (1) EP0321377A1 (fr)
JP (1) JPH01266250A (fr)
ES (1) ES2006240A6 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0498464A2 (fr) * 1991-02-08 1992-08-12 Werner Schlaich Frein de fil à entraînement démultiplié pour le fournisseur de fil d'un métier à tricoter ou pareil
DE19637556C1 (de) * 1996-09-14 1998-01-08 Memminger Iro Gmbh Fadenliefervorrichtung
TWI623661B (zh) * 2014-12-29 2018-05-11 Po Lin Chen Yarn feeding wheel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011168916A (ja) * 2010-02-18 2011-09-01 Gunze Ltd 積極給糸装置の糸検出装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1133959A (fr) * 1954-06-18 1957-04-04 Stibbe G & Co Ltd Perfectionnements apportés aux dispositifs d'alimentation de fil des machines à tricoter
FR1431200A (fr) * 1964-03-11 1966-03-11 Palitex Project Co Gmbh Rouleau d'avance pour métier à retordoir ascendant, notamment pour retordoir à double torsion
FR2112833A5 (en) * 1970-11-04 1972-06-23 Stein Paul Henri Constant tension yarn feed - for circular knitting machine
GB2156867A (en) * 1984-04-04 1985-10-16 Sipra Patent Beteiligung A device for positive thread delivery on textile machinery

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1133959A (fr) * 1954-06-18 1957-04-04 Stibbe G & Co Ltd Perfectionnements apportés aux dispositifs d'alimentation de fil des machines à tricoter
FR1431200A (fr) * 1964-03-11 1966-03-11 Palitex Project Co Gmbh Rouleau d'avance pour métier à retordoir ascendant, notamment pour retordoir à double torsion
FR2112833A5 (en) * 1970-11-04 1972-06-23 Stein Paul Henri Constant tension yarn feed - for circular knitting machine
GB2156867A (en) * 1984-04-04 1985-10-16 Sipra Patent Beteiligung A device for positive thread delivery on textile machinery

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0498464A2 (fr) * 1991-02-08 1992-08-12 Werner Schlaich Frein de fil à entraînement démultiplié pour le fournisseur de fil d'un métier à tricoter ou pareil
EP0498464A3 (en) * 1991-02-08 1992-12-02 Werner Schlaich Reduced driven yarn brake for the yarnfurnischer of a knitting machine or the like
DE19637556C1 (de) * 1996-09-14 1998-01-08 Memminger Iro Gmbh Fadenliefervorrichtung
TWI623661B (zh) * 2014-12-29 2018-05-11 Po Lin Chen Yarn feeding wheel

Also Published As

Publication number Publication date
JPH01266250A (ja) 1989-10-24
ES2006240A6 (es) 1989-04-16

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