EP0968949A1 - Fournisseur de trame pour métiers à tisser avec des moyens améliorés pour l'avancement et la séparation des boucles des fils de réserve - Google Patents

Fournisseur de trame pour métiers à tisser avec des moyens améliorés pour l'avancement et la séparation des boucles des fils de réserve Download PDF

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Publication number
EP0968949A1
EP0968949A1 EP99112756A EP99112756A EP0968949A1 EP 0968949 A1 EP0968949 A1 EP 0968949A1 EP 99112756 A EP99112756 A EP 99112756A EP 99112756 A EP99112756 A EP 99112756A EP 0968949 A1 EP0968949 A1 EP 0968949A1
Authority
EP
European Patent Office
Prior art keywords
bush
driving shaft
weft
bush body
shaft
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.)
Granted
Application number
EP99112756A
Other languages
German (de)
English (en)
Other versions
EP0968949B1 (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 EP0968949A1 publication Critical patent/EP0968949A1/fr
Application granted granted Critical
Publication of EP0968949B1 publication Critical patent/EP0968949B1/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

Definitions

  • the present invention relates to an improvement to weft feeders for textile looms.
  • the invention relates to weft feeders of the type that comprises a fixed drum on which a windmilling arm winds a plurality of turns of yarn which constitute a weft reserve and from which the turns unwind, when requested by the loom, under the control of a braking element which ensures the necessary mechanical tension of said yarn.
  • these weft feeders have a movement device which is suitable to move the turns wound by the windmilling arm from the base to the free end of the drum; said device also separates the turns from each other by an extent, or separation pitch, which can be changed in order to pack or spread out said turns in order to increase or respectively decrease the weft reserve.
  • Said conventional device is constituted by a set of movement rods which partially and cyclically protrude from corresponding slots of the drum and are subjected to a movement system suitable to make said rods perform a substantially undulatory motion by virtue of which all the turns are raised cyclically from the surface of the drum and deposited back onto it after being caused to advance longitudinally toward the free end of the drum by an extent which is equal to the preset spacing pitch.
  • the movement rods arranged parallel to the generatrices of the drum, are individually connected, by means of respective spokes, to a central hub which is rotationally coupled, with a rolling bearing interposed so that the hub is rotationally fixed, to a bush which is rigidly connected to the driving shaft of the feeder and whose axis is oblique with respect to the axis of said driving shaft.
  • the aim of the present invention is to eliminate the above-mentioned drawbacks of both conventional movement systems.
  • a main object of the present invention is to provide a weft feeder with means for the advancement and separation of the turns of the weft reserve which are improved so as to require no particular and expensive machinings of the driving shaft and at the same time have extremely modest radial dimensions as well as a considerable structural simplification, with consequent reduced manufacturing and assembly costs.
  • an improved weft feeder with means for moving and separating the turns of the weft reserve as specified characterized in that the oblique bush of said means is constituted by a first bush body, which is substantially semicylindrical and is suitable to be detachably associated with the driving shaft in order to delimit an eccentric portion on said shaft, and by a second bush body, which is cylindrical and hollow and is suitable to be fitted on said eccentric portion of the shaft which is delimited by said first bush body and has an external surface which is inclined with respect to the axis of the driving shaft.
  • said first bush body is made of plastics and is provided with a radially protruding pin which is suitable to engage a corresponding radial hole of the driving shaft in order to prevent angular movements of said first body with respect to the shaft, so as to ensure the phasing of said first body with respect to eccentric balancing masses which are associated with said shaft.
  • 10 generally designates a conventional weft feeder which comprises a fixed base 11 and a fixed drum 12 on which a hollow arm 13, actuated by the hollow driving shaft 14 of the feeder 10, winds in a windmilling fashion a plurality of turns of yarn F which constitute a weft reserve RT.
  • the turns of the reserve RT unwind from the free end of the drum in the advancement direction DS under the control of a braking means (not shown) which is supported by a supporting ring 15, whose axial position can be changed by means of a knob 16 in order to adjust the braking action.
  • a braking means (not shown) which is supported by a supporting ring 15, whose axial position can be changed by means of a knob 16 in order to adjust the braking action.
  • a movement system is associated with the drum 12 and is suitable to move the turns wound by the windmilling arm 13 from the base toward the free end of the drum 12, keeping them separated by an extent s, termed separation pitch, which can vary within preset limits.
  • said movement system is constituted by a set of movement rods 17 which partially and cyclically protrude from corresponding slots 18 provided in the cylindrical surface of the drum 12.
  • the rods 17 are individually connected, by means of respective spokes 19, to a hub 20 which is rotationally coupled, with a rolling bearing 22 interposed, to a bush which is keyed to the driving shaft 14 and whose axis is oblique with respect to the axis "a" of said driving shaft.
  • an improved bush generally designated by the reference numeral 30, which comprises a first bush body 31 which is substantially semicylindrical ( Figures 3 and 4) and a second bush body 32 which is cylindrical and hollow and whose external surface 32a is inclined with respect to the axis of the driving shaft 14.
  • the first bush body 31 is adapted to be detachably associated on a recessed part of the driving shaft 14 in order to delimit on said shaft an eccentric portion 14a which is suitable to receive the second cylindrical and hollow bush body 32 fitted thereon.
  • the first bush body 31 has, in cross-section, a crescent-shaped profile ( Figures 4 and 6) which is internally delimited by a portion of the external circumference Ce of the driving shaft 14 and externally delimited by a portion of the internal circumference Ci of the second bush body 32; the two circumferences are tangent in a point P which is diametrically opposite to the part of the shaft portion 14 that receives said first bush body 31.
  • the first bush body 31 is made of plastics, typically chosen in the group that comprises acetal resins and the material known by the acronym ABS (acrylonitrile-butadiene-styrene) and has a pin 33 which protrudes radially toward the concave part of said body.
  • a corresponding radial hole 34 of the shaft 14 cooperates with said pin and receives it in order to prevent said first bush body 31 from performing angular movements, maintaining and therefore ensuring its phasing with respect to eccentric balancing masses 35 provided in the shaft 14 ( Figure 2).

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19990112756 1998-07-03 1999-07-01 Fournisseur de trame pour métiers à tisser avec des moyens améliorés pour l'avancement et la séparation des boucles des fils de réserve Expired - Lifetime EP0968949B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO980124 IT245866Y1 (it) 1998-07-03 1998-07-03 Alimentatore di trama per telai di tessitura con mezzi perfezionatidi avanzamento e separazione delle spire della riserva di trama
ITTO980124U 1998-07-03

Publications (2)

Publication Number Publication Date
EP0968949A1 true EP0968949A1 (fr) 2000-01-05
EP0968949B1 EP0968949B1 (fr) 2002-10-02

Family

ID=11416436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990112756 Expired - Lifetime EP0968949B1 (fr) 1998-07-03 1999-07-01 Fournisseur de trame pour métiers à tisser avec des moyens améliorés pour l'avancement et la séparation des boucles des fils de réserve

Country Status (3)

Country Link
EP (1) EP0968949B1 (fr)
DE (1) DE69903223T2 (fr)
IT (1) IT245866Y1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110172768A (zh) * 2019-06-19 2019-08-27 苏州济洋纺织机械有限公司 一种纱线热定型装置
EP3587643A1 (fr) 2018-06-28 2020-01-01 Memminger-IRO GmbH Appareil d'alimentation en fil et système doté d'un appareil d'alimentation en fil
CN116334803A (zh) * 2021-12-24 2023-06-27 张家港市德胜染整有限责任公司 一种纱线膨化定型机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2267270A1 (fr) * 1974-04-10 1975-11-07 Calamani Sergio
EP0164033A2 (fr) 1984-06-04 1985-12-11 ROJ ELECTROTEX S.p.A. Fournisseur de trame pour métiers à tisser
EP0643004A1 (fr) * 1993-09-10 1995-03-15 L.G.L. ELECTRONICS S.p.A. Dispositif pour séparer les boucles de fil de réserve sur les fournisseurs pour métiers à tisser ou similaires

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2267270A1 (fr) * 1974-04-10 1975-11-07 Calamani Sergio
EP0164033A2 (fr) 1984-06-04 1985-12-11 ROJ ELECTROTEX S.p.A. Fournisseur de trame pour métiers à tisser
EP0643004A1 (fr) * 1993-09-10 1995-03-15 L.G.L. ELECTRONICS S.p.A. Dispositif pour séparer les boucles de fil de réserve sur les fournisseurs pour métiers à tisser ou similaires

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3587643A1 (fr) 2018-06-28 2020-01-01 Memminger-IRO GmbH Appareil d'alimentation en fil et système doté d'un appareil d'alimentation en fil
CN110172768A (zh) * 2019-06-19 2019-08-27 苏州济洋纺织机械有限公司 一种纱线热定型装置
CN116334803A (zh) * 2021-12-24 2023-06-27 张家港市德胜染整有限责任公司 一种纱线膨化定型机

Also Published As

Publication number Publication date
ITTO980124V0 (it) 1998-07-03
DE69903223D1 (de) 2002-11-07
ITTO980124U1 (it) 2000-01-03
EP0968949B1 (fr) 2002-10-02
DE69903223T2 (de) 2003-08-14
IT245866Y1 (it) 2002-03-26

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