EP1367157A1 - Fadenbremse für Textilmaschinen - Google Patents

Fadenbremse für Textilmaschinen Download PDF

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Publication number
EP1367157A1
EP1367157A1 EP03008241A EP03008241A EP1367157A1 EP 1367157 A1 EP1367157 A1 EP 1367157A1 EP 03008241 A EP03008241 A EP 03008241A EP 03008241 A EP03008241 A EP 03008241A EP 1367157 A1 EP1367157 A1 EP 1367157A1
Authority
EP
European Patent Office
Prior art keywords
yarn
bushes
pivot
bush
supporting structure
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
EP03008241A
Other languages
English (en)
French (fr)
Other versions
EP1367157B1 (de
Inventor
Giovanni Pedrini
Rosario Castelli
Ruggero Magoni
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 EP1367157A1 publication Critical patent/EP1367157A1/de
Application granted granted Critical
Publication of EP1367157B1 publication Critical patent/EP1367157B1/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
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
    • B65H59/32—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged away from each other
    • 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

  • This invention relates to a yarn-braking device for textile machines.
  • a known braking device described in IT-A-01303154, comprises a set of three fixed coaxial yarn-guiding bushes, through which the weft yarn passes, tracing a straight path in the region between the bushes.
  • An oscillating lever is connected to a U-shaped braking element, which straddles the central bush in order to engage the yarn, during braking, in the free portions between the central bush and the end bushes.
  • the lever is articulated to the stem of a linear motor which, when actuated, causes its oscillation. The lever, by deflecting the yarn from its straight path, brakes it by friction.
  • the aim of the present invention is therefore to overcome this shortcoming of known devices, by providing a yarn-braking device for textile machines that can be configured adequately in relation to the type of yarn, thereby allowing a softer braking action to be generated if required by the characteristics of the yarn.
  • An object of the invention is to provide said yarn braking device so that it is simple and straightforward to be adjusted.
  • Another object of the invention is to provide said device so that it has a low cost and is simple to manufacture and can be produced by virtue of known equipment and systems commonly used in the field.
  • a generic weft feeder 10 comprises a motor body 12 to which a fixed drum 14 is connected.
  • the end 22 of said arm is curved radially toward the axis of the drum 14 and rigidly supports a hollow pivot 24, on which the supporting structure 26 of the braking device 20 is clamped in a vise-like fashion.
  • the supporting structure 26 has a cylindrical cavity 28, whose diameter matches the diameter of the pivot 24 and is suitable to form a seat for said pivot.
  • the wall of the cylindrical cavity 28 has a longitudinal slit 30, and the braking device 20 is locked onto the pivot 24 by virtue of fixing screws, which are inserted in a tangential hole 82 formed in an edge of the slit and engage in corresponding threaded holes 84 formed in the opposite edge ( Figures 3, 8 and 9).
  • Two sleeves 38 and 40 which support respective yarn guiding bushes 34 and 36 whose axis is parallel and spaced with respect to the axis of the sleeves, are pivoted on a bush supporting pivot 42, which is parallel to the hollow pivot 24 and is accommodated in a protruding cylindrical seat 50 of the supporting structure 26.
  • the distance between the axis of the bushes 34 and 36 and the axis of the sleeves 38 and 40 is substantially equal to the distance between the axis of the bush supporting pivot 42 and the axis of the hollow pivot 24.
  • the sleeves 38 and 40 are arranged in head-to-head contact on the bush supporting pivot 42, and the end sleeve 40 has, at the annular surface that makes contact with the central sleeve 38, teeth 44 in diametrically opposite positions, which can engage in corresponding seats 46 formed in the adjacent edge of the central sleeve 38.
  • said central sleeve is in head-to-head contact with the cylindrical seat 50 and has, on the annular surface that lies opposite the surface that contacts the end sleeve 40, teeth 48 that can engage in corresponding seats 52 formed in the edge of the cylindrical seat 50.
  • the central sleeve 38 is clamped in a pack-like fashion between the cylindrical seat 50 and the end sleeve 40, so that the teeth 44, 48 engage in the respective seats 46 and 52 by virtue of locking screws 58 and 60 which are engaged at the appropriately threaded opposite ends of the pivot 42 and abut respectively against the end sleeve 40 and against the base of the cylindrical seat 50.
  • the outlet of the hollow pivot 24 also forms a final bush 64 for the yarn F.
  • a U-shaped braking element 62 straddles the central bush 34 and is fixed radially to the shaft 54 of a rotary motor 56 that is rigidly coupled to the supporting structure 26.
  • the weft yarn F that unwinds from the drum 14 passes inside the hollow pivot 24 and through one or both of the yarn guiding bushes 34 and 36, depending on the configuration of the device as will become better apparent hereinafter, tracing a straight path when the brake is inactive.
  • the braking element 62 is made to oscillate and therefore deflects the yarn F from its straight path and brakes it by friction.
  • the braking element 62 deflects the yarn in three regions 70, 72 and 74 in the portion that lies between the outlet of the hollow pivot 24 and the final bush 36.
  • the locking screws 58 and 60 are loosened in order to disengage the teeth 44, 48 of the sleeves from the respective seats 46 and 52, the central bush 34 is turned over through 180°, placing it in a passive position, and the assembly constituted by the sleeves and the cylindrical seat is again tightened in a pack-like fashion.
  • the braking element 62 deflects the yarn in only two regions 76 and 78, in the portion between the outlet of the hollow pivot 24 and the end bush 36, and this deflection is furthermore much less drastic than in the preceding case ( Figures 6, 7 and 9).
  • One thus obtains a softer braking action, which is particularly suitable for certain types of yarn.
  • FIGS 10 to 13 illustrate a constructive variation of the braking device according to the invention, in which the similar parts, designated by the same reference numeral as in the preceding figures increased by 100, are not described further.
  • the central bush 134 can perform a radial translational motion in a vertical direction and has an oval shape, its major axis being parallel to the direction of radial translational motion.
  • said bush rigidly supports a threaded seat 86, in which a screw 88 is engaged; said screw is accommodated rotationally in a receptacle 90 formed in a block 100 that is mounted detachably on a pivot 142 that is rigidly coupled to the supporting structure 126, and said screw is in abutment on said receptacle 90.
  • the central bush 134 can be locked in an end position in which no interference occurs during braking with the yarn that passes through it.
  • the end bushes 164, 136 are supported by respective bushings 200, 202 mounted on the pivot 142.
  • the invention fully achieves the intended aim and objects, since it provides a weft yarn braking device that can be adjusted for more or less forceful braking depending on the type of yarn. Moreover, the adjustment of said braking device is simple and straightforward to perform and requires no particular care or refinements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP03008241A 2002-05-30 2003-04-09 Fadenbremse für Textilmaschinen Expired - Lifetime EP1367157B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20020460 2002-05-30
IT2002TO000460A ITTO20020460A1 (it) 2002-05-30 2002-05-30 Dispositivo di frenatura del filato per macchine tessili.

Publications (2)

Publication Number Publication Date
EP1367157A1 true EP1367157A1 (de) 2003-12-03
EP1367157B1 EP1367157B1 (de) 2006-11-22

Family

ID=27639127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03008241A Expired - Lifetime EP1367157B1 (de) 2002-05-30 2003-04-09 Fadenbremse für Textilmaschinen

Country Status (4)

Country Link
EP (1) EP1367157B1 (de)
CN (1) CN100513662C (de)
DE (1) DE60309776T2 (de)
IT (1) ITTO20020460A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1371763A2 (de) * 2002-06-11 2003-12-17 L.G.L. Electronics S.p.A. Fadenbremse für Webmaschinen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102454006A (zh) * 2010-10-29 2012-05-16 吴江东益纺织有限公司 喷水织机压线装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972734A1 (de) * 1998-07-17 2000-01-19 L.G.L. Electronics S.p.A. Modulierte Schussfadenbremse für Textilmaschinen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59105505D1 (de) * 1990-09-10 1995-06-22 Rueti Ag Maschf Fadenbremse für Webmaschinen.
BE1005173A3 (nl) * 1991-08-13 1993-05-11 Picanol Nv Draadrem.
DE19544202B4 (de) * 1995-11-28 2007-01-04 Saurer Gmbh & Co. Kg Verfahren und Vorrichtung zum Einregeln einer nach einem Rechenspanner vorliegenden Fadenzugkraft in einer Textilmaschine
IT1284077B1 (it) * 1996-06-27 1998-05-08 Roj Electrotex Nuova Srl Dispositivo frena-filo per macchine tessili
NL1011171C1 (nl) * 1999-01-29 2000-08-01 Te Strake Bv Weefmachine met een inlooprem.
DE60017667T2 (de) * 1999-10-26 2005-07-07 L.G.L. Electronics S.P.A., Gandino Schussfadenbremse, insbesondere für Webmaschinen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972734A1 (de) * 1998-07-17 2000-01-19 L.G.L. Electronics S.p.A. Modulierte Schussfadenbremse für Textilmaschinen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1371763A2 (de) * 2002-06-11 2003-12-17 L.G.L. Electronics S.p.A. Fadenbremse für Webmaschinen
EP1371763A3 (de) * 2002-06-11 2004-04-14 L.G.L. Electronics S.p.A. Fadenbremse für Webmaschinen

Also Published As

Publication number Publication date
CN1461835A (zh) 2003-12-17
EP1367157B1 (de) 2006-11-22
ITTO20020460A0 (it) 2002-05-30
CN100513662C (zh) 2009-07-15
DE60309776D1 (de) 2007-01-04
DE60309776T2 (de) 2007-09-13
ITTO20020460A1 (it) 2003-12-01

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