EP1094138A1 - Ballonbegrenzer für eine Schussfadenliefervorrichtung in Webmaschinen - Google Patents

Ballonbegrenzer für eine Schussfadenliefervorrichtung in Webmaschinen Download PDF

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Publication number
EP1094138A1
EP1094138A1 EP00121294A EP00121294A EP1094138A1 EP 1094138 A1 EP1094138 A1 EP 1094138A1 EP 00121294 A EP00121294 A EP 00121294A EP 00121294 A EP00121294 A EP 00121294A EP 1094138 A1 EP1094138 A1 EP 1094138A1
Authority
EP
European Patent Office
Prior art keywords
feeder
drum
shield
fixed
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.)
Granted
Application number
EP00121294A
Other languages
English (en)
French (fr)
Other versions
EP1094138B1 (de
Inventor
Giovanni Pedrini
Pietro Zenoni
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 EP1094138A1 publication Critical patent/EP1094138A1/de
Application granted granted Critical
Publication of EP1094138B1 publication Critical patent/EP1094138B1/de
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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/22—Guides for filamentary materials; Supports therefor adapted to prevent excessive ballooning of material
    • 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
    • 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
    • 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 present invention relates to weft feeders for textile looms of the gripper or projectile type and of the air-jet type, and regards the anti-balloon devices which are fitted to such feeders.
  • welt feeders for current weaving looms are devices which comprise a fixed drum having a constant or variable diameter and on which a weft winding arm, which revolves around the drum, winds in a fishing-reel fashion onto the drum a plurality of turns of yam which constitute a weft reserve.
  • a supervisor microprocessor which receives the signals of a sensor suitable to detect the passage of the unwinding turns, moves the weft winding arm in order to restore the weft reserve as its turns unwind in order to feed the loom.
  • Conventional anti-balloon devices having various structures are substantially constituted by conical shields associated or not with cylindrical surfaces.
  • US-3,971,522 discloses an anti-balloon device of the first type, which comprises a conical shield protruding from the delivery edge of the drum of the feeder up to the final guiding ring of the feeder.
  • anti-balloon devices of both of the above specified types consists in that if the weft feeder requires any maintenance or repair in regions concealed by the cylindrical surface and/or by the conical shield of the anti-balloon device, such anti-balloon device and/or part of the weft feeder must be disassembled and removed.
  • the entire conical-cylindrical shield constituting the anti-balloon device is hinged to the fixed body of the feeder and can swing from the operating or closed position, which is aligned with the drum of the feeder, to an open position, hereinafter concisely termed access position, which allows access to the drum and in general to the front end portion of the feeder.
  • the conical shield of the anti-balloon device disclosed in US-4,753,274 also is rigidly coupled to a supporting arm which can swing in order to pass from the active position to the access position and vice versa.
  • the prior art offers only the disassembly of the shield and/or of the surface of the device, which are long and troublesome operations requiring corresponding long machine downtimes which are economically very disadvantageous.
  • the aim of the present invention is essentially to eliminate the above-cited drawbacks of conventional types of anti-balloon device.
  • an object of the present invention is to provide an anti-balloon device which is structured so as to allow easier and rapid access to the yarn and to the underlying mechanical parts or portions of the weft feeder, but at the same time does not increase at all the bulk of the feeder neither in the active configuration nor in the access configuration.
  • Another important object of the present invention is to provide an anti-balloon device which is structured so as to ensure perfect control of the balloon of yarn, but at the same time does not interfere at all with the action of the braking means, which can thus be installed or not in combination with the anti-balloon device according to the present invention and, if installed, can be of any type, e.g. of the brush, lamina, self-modulating or electrically-actuated types.
  • Another important object of the present invention is to provide an anti-balloon device which is improved from the point of view of structural simplification, can be easily applied to any type of feeder, is functionally efficient and economically very advantageous.
  • the invention is based on the concept of providing the device in the form of a continuous cylindrical or conical shield rigidly coupled to the body of the feeder and of providing the shield with at least one removable portion which, when removed from its active position, allows access to the corresponding and underlying portion of the feeder and/or to the yarn that is unwinding from said feeder.
  • the device is constituted by a cylindrical surface surrounding the drum of the feeder upstream of the braking means and comprising one semi-cylindrical portion which is stably coupled to the body of the feeder and another semi-cylindrical portion which is detachably coupled to the first one with rapid-removal connecting means.
  • the surface is continuous, is axially shorter than the drum, and is rigidly coupled to the body of the feeder by means of sliders and guides which cooperate and are adapted to allow a translatory motion of the surface from an active position, adjacent to the braking means, to an access position, in which the surface is moved to the base of the fixed drum and vice versa.
  • the cylindrical or conical shield constituting the device is provided with at least one window-like opening for accessing a corresponding portion of the feeder and/or yarn arranged below, and such opening is provided with a swinging or removable closure door.
  • the reference numeral 10 generally designates a weft feeder for gripper or projectile looms, which comprises a fixed drum 11 on which a hollow weft winding arm 12, which revolves around the drum, winds like in a fishing-reel fashion a plurality of turns of yarn which constitute a weft reserve RT.
  • a weft feeder for gripper or projectile looms, which comprises a fixed drum 11 on which a hollow weft winding arm 12, which revolves around the drum, winds like in a fishing-reel fashion a plurality of turns of yarn which constitute a weft reserve RT.
  • an anti-balloon device Directly upstream of the braking means 13 there is provided an anti-balloon device, generally designated by the reference numeral 14, which due to the above reasons, is designed to prevent the yarn, by forming the balloon, from generating tangles, knots and non-uniformities which cause the breakage of the yarn in passing through the braking means 13.
  • the anti-balloon device 14 of Figures 1 and 2 is formed by a cylindrical surface, which is rigidly coupled to a rigid arm 16' of the body 16 of the feeder, surrounds the drum 11 and has an axial extension equal to approximately 40% of the overall axial extension of the drum.
  • the cylindrical surface is constituted by two semicylindrical portions 15a and 15b: the first portion is fixed and non-detachably coupled to the arm 16', while the second portion is movable and detachably coupled to the first portion by rapid-removal connection means.
  • the fixed semicylindrical portion 15a of the surface has a fixed front ring 17 which is rigidly coupled thereto and acts as front abutment for the movable semicylindrical portion 15b provided with a corresponding abutment half-ring 17' and acts as rigid contrast support for the connecting means of the movable semicylindrical portion.
  • such means are constituted by permanent magnets 18 which are embedded flush in corresponding seats provided in the half-ring 17' of the movable portion 15b and cooperate with respective permanent magnets 18' of opposite polarity which are embedded flush in corresponding facing seats of the front ring 17.
  • connection means are constituted by knobs with a threaded stem 19 which passes through through holes 20 of the front ring 17 of the fixed semicylindrical portion 15b in order to engage in corresponding threaded holes 19' provided in the half-ring 17' of the movable semicylindrical portion 15b and with a knurled head 19'' which allows to grip the knob and manually tighten and loosen it rapidly.
  • Figure 2b illustrates another constructive variation, in which the movable semicylindrical portion 15b is detachably connected to the fixed one 15a by means of flexible U-shaped brackets 21 which engage, in a straddling configuration, the front ring 17 and the front abutment half-ring 17' provided on the portion 15b.
  • FIG. 3 illustrates an anti-balloon device 14' constituted by a continuous cylindrical surface 15 which surrounds the drum 11 and also has an axial length equal to 40-50% of the axial length of the drum.
  • the cylindrical surface 15 is supported by the arm 16' of the body of the feeder by means of sliders 22 which are slidingly mounted on longitudinal guides 23 rigidly coupled to the arm.
  • the ring 15 can thus perform a translatory motion from an active position (Figure 3), in which it is adjacent to the braking means 13, to an access position ( Figure 3a), in which it is moved at the base of the drum 11, and vice versa.
  • Figure 4 illustrates another embodiment, in which the anti-balloon device 14'' is formed by a fixed cylindrical shield 24 which substantially has the same axial length as the drum 11, is non-detachably coupled to the arm 16' of the body 16 and is provided with a window-like opening 25 which allows access to a corresponding underlying portion of the feeder; the opening 25 is provided with a closure door 26 which can swing about a hinge 27 and is provided with snap-acting retention means (not shown).
  • Figures 5 and 5a relate to constructive variations related to anti-balloon devices 114 which are adapted for weft feeders 100 for air-jet looms.
  • the device is constituted by a conical shield 115 which is stably and frontally rigidly coupled to the drum 110 of the feeder 100 by means of a rigid bracket 117 which is non-detachably connected, by means of bolts 117', to the arm 116' of the body 116 of the feeder.
  • An inspection port 125 is provided on the conical shield 115 and is closed by a swinging door 126 connected to the shield by means of a hinge 127.
  • the inspection port 125 provided on the conical surface 115, is closed by a removable door 126' retained in the active position on the shield by the action of permanent magnets 118 provided on the edges of the door 125 and/or of permanent magnets of opposite polarity (not shown) correspondingly provided on the edges of the door 126'.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Woven Fabrics (AREA)
EP00121294A 1999-10-22 2000-10-06 Ballonbegrenzer für eine Schussfadenliefervorrichtung in Webmaschinen Expired - Lifetime EP1094138B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO990915 1999-10-22
IT1999TO000915A IT1311244B1 (it) 1999-10-22 1999-10-22 Perfezionamenti ai dispositivi antiballoon per apparecchi alimentatori di trama a telai di tessitura.

Publications (2)

Publication Number Publication Date
EP1094138A1 true EP1094138A1 (de) 2001-04-25
EP1094138B1 EP1094138B1 (de) 2004-02-25

Family

ID=11418162

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00121294A Expired - Lifetime EP1094138B1 (de) 1999-10-22 2000-10-06 Ballonbegrenzer für eine Schussfadenliefervorrichtung in Webmaschinen

Country Status (3)

Country Link
EP (1) EP1094138B1 (de)
DE (1) DE60008477T2 (de)
IT (1) IT1311244B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006131173A1 (de) * 2005-06-07 2006-12-14 Iro Ab Fadenliefergerät für greifer- und projektilwebmaschinen
EP2169099A1 (de) 2008-09-25 2010-03-31 L.G.L. Electronics S.p.A. Negativer Garnzuführer mit Schussfadenbremsvorrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2225918A1 (de) * 1972-04-28 1973-10-31 Sulzer Ag Verfahren fuer den gebremsten abzug fadenfoermigen materials von einem wickelkoerper einer speichereinrichtung fuer textilmaschinen und einrichtung zur durchfuehrung des verfahrens
FR2416187A1 (fr) * 1978-02-07 1979-08-31 Sulzer Ag Dispositif d'accumulation de matiere filamentaire
DE2842115A1 (de) * 1978-09-27 1980-04-10 Iro Ab Fadenspeicher- und -liefervorrichtung fuer textilmaschinen
GB2163782A (en) * 1984-08-23 1986-03-05 Elitex Zavody Textilniho Fluid jet weft thread insertion in a weaving loom

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2225918A1 (de) * 1972-04-28 1973-10-31 Sulzer Ag Verfahren fuer den gebremsten abzug fadenfoermigen materials von einem wickelkoerper einer speichereinrichtung fuer textilmaschinen und einrichtung zur durchfuehrung des verfahrens
FR2416187A1 (fr) * 1978-02-07 1979-08-31 Sulzer Ag Dispositif d'accumulation de matiere filamentaire
DE2842115A1 (de) * 1978-09-27 1980-04-10 Iro Ab Fadenspeicher- und -liefervorrichtung fuer textilmaschinen
GB2163782A (en) * 1984-08-23 1986-03-05 Elitex Zavody Textilniho Fluid jet weft thread insertion in a weaving loom

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006131173A1 (de) * 2005-06-07 2006-12-14 Iro Ab Fadenliefergerät für greifer- und projektilwebmaschinen
CN101203447B (zh) * 2005-06-07 2011-06-29 Iro有限公司 用于剑杆织机和片梭织机的喂纱装置
EP2169099A1 (de) 2008-09-25 2010-03-31 L.G.L. Electronics S.p.A. Negativer Garnzuführer mit Schussfadenbremsvorrichtung

Also Published As

Publication number Publication date
ITTO990915A0 (it) 1999-10-22
DE60008477D1 (de) 2004-04-01
DE60008477T2 (de) 2005-02-03
EP1094138B1 (de) 2004-02-25
IT1311244B1 (it) 2002-03-04
ITTO990915A1 (it) 2001-04-22

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