EP1367157B1 - Fadenbremse für Textilmaschinen - Google Patents

Fadenbremse für Textilmaschinen Download PDF

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Publication number
EP1367157B1
EP1367157B1 EP03008241A EP03008241A EP1367157B1 EP 1367157 B1 EP1367157 B1 EP 1367157B1 EP 03008241 A EP03008241 A EP 03008241A EP 03008241 A EP03008241 A EP 03008241A EP 1367157 B1 EP1367157 B1 EP 1367157B1
Authority
EP
European Patent Office
Prior art keywords
yarn
pivot
bush
bushes
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.)
Expired - Lifetime
Application number
EP03008241A
Other languages
English (en)
French (fr)
Other versions
EP1367157A1 (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)

Claims (19)

  1. Garnabbremsvorrichtung für Textilmaschinen, mit einer Haltestruktur (26), die einen Satz aus drei Garnführungsbuchsen (34, 36, 64) hält, durch die das Schussgarn (F) laufen kann, und einem U-förmigen Bremselement (62), das mit einer Motoreinrichtung (56) verbunden ist und die mittlere Buchse (34) übergreift, um mit dem Garn (F) während des Abbremsens in den freien Bereichen zwischen der mittleren Buchse (34) und den Endbuchsen (36, 64) in Eingriff zu kommen und dadurch das Garn (F) durch Reibung abzubremsen, dadurch gekennzeichnet, dass die Buchsen (34, 36, 64) an einer Halteeinrichtung (38,40) befestigt sind, deren Position einstellbar ist, um die gegenseitige Stellung der Buchsen (34, 36, 64) zu verändern.
  2. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass die Halteeinrichtung wahlweise in einer ersten Stellung arretiert werden kann, in der die mittlere Buchse (34) im Wesentlichen koaxial zu den Endbuchsen (36, 64) ist und von dem Garn (F) durchquert wird, oder in einer zweiten Stellung, in der die mittlere Buchse (34) bezüglich der Endbuchsen (34, 64) axial versetzt ist und nicht von dem Garn (F) durchquert wird.
  3. Vorrichtung nach Anspruch 2,
    dadurch gekennzeichnet, dass die Haltevorrichtungen Hülsen (38, 40) umfassen, deren Achse bezüglich der Achse der entsprechenden Buchsen (34, 36) parallel und beabstandet ist, wobei die Hülsen auf einem Buchsenlagerzapfen (42) drehbar gelagert sind, der starr mit der Haltestruktur (26) verbunden ist.
  4. Vorrichtung nach Anspruch 3,
    dadurch gekennzeichnet, dass die Hülsen (38, 40) in Kopf-an-Kopf Kontakt auf dem Buchsenlagerzapfen (42) angeordnet sind und einer von ihnen in Anlage an einer Basis (50) des Zapfens ist, die starr mit der Haltestruktur (26) verbunden ist.
  5. Vorrichtung nach Anspruch 4,
    dadurch gekennzeichnet, dass die Hülsen (38, 40) und die Basis (50) des Zapfens an den ringförmigen Flächen, wo gegenseitiger Kontakt auftritt, Mittel (44, 46, 48, 52) zum gegenseitigen Arretieren haben, die wahlweise in der ersten oder der zweiten Stellung arretiert werden können.
  6. Vorrichtung nach Anspruch 5,
    dadurch gekennzeichnet, dass die gegenseitigen Arretierungsmittel Zähne (44, 48) umfassen, die von den Kontaktflächen hervorstehen und in korrespondierende Sitze (46, 52) eingreifen können, die auf den benachbarten Kontaktflächen gebildet sind.
  7. Vorrichtung nach Anspruch 5,
    dadurch gekennzeichnet, dass die mittlere Hülse (38) in gepackter Art zwischen die Basis (50) und die Endhülse (40) geklemmt ist, wobei die gegenseitigen Arretierungsmittel aufgrund eines Paares von Klemmschrauben (58, 60) gegenseitig in Eingriff sind, die in die entgegengesetzten Gewindeenden des Buchsenlagerzapfens (42) eingreifen und in Anlage an der Endhülse (40) bzw. an der Basis (50) sind.
  8. Vorrichtung nach Anspruch 4,
    dadurch gekennzeichnet, dass die Basis ein hervorstehender zylindrischer Sitz (50) der Haltestruktur (26) ist, der den Buchsenlagerzapfen (42) aufnimmt.
  9. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass die mittlere Buchse (134) eine radiale Transhtionsbewegung ausführen kann und In einer bezüglich der Endbuchsen (136, 164) axial versetzten Stellung arretiert werden kann.
  10. Vorrichtung nach Anspruch 9,
    dadurch gekennzeichnet, dass die Halteeinrichtung einen Gewindesitz (86) umfasst, der starr mit der mittleren Buchse (134) verbunden ist und in den eine Schraube (88) eingreifen kann, wobei die Schraube drehbar in eine Aufnahme (90) eingreift, die starr mit der Haltestruktur (26) verbunden und in Anlage an der Aufnahme (90) ist.
  11. Vorrichtung nach Anspruch 10,
    dadurch gekennzeichnet, dass die Aufnahme (90) in einem Block (100) gebildet ist, der abnehmbar auf einem Lagerzapfen (142) angebracht ist, der starr mit der Haltestruktur (126) verbunden ist.
  12. Vorrichtung nach Anspruch 11,
    dadurch gekennzeichnet, dass die Endbuchsen (164, 136) durch entsprechende Buchsen (200, 202) gehalten sind, die auf dem Lagerzapfen (142) angebracht sind.
  13. Vorrichtung nach einem der Ansprüche 9 bis 12,
    dadurch gekennzeichnet, dass sie Rückhaltemittel umfasst, die zum Verhindern der Rotation der mittleren Buchse (134) bezüglich der Haltestruktur (26) geeignet sind.
  14. Vorrichtung nach einem der Ansprüche 9 bis 13,
    dadurch gekennzeichnet, dass die mittlere Buchse (134) in einer Endstellung arretiert werden kann, in der während des Abbremsens kein Kontakt mit dem durch sie laufehden Garn (F) auftritt.
  15. Vorrichtung nach einem der Ansprüche 9 bis 14,
    dadurch gekennzeichnet, dass die mittlere Buchse (134) oval ist und ihre Hauptachse parallel zur Richtung der radialen Translationsbewegung ist.
  16. Vorrichtung nach einem der vorhergehenden Ansprüche zur Verwendung auf einem gewöhnlichen Schussgerät (10) mit einem Motorgehäuse (12),
    dadurch gekennzeichnet, dass die Haltestruktur (26, 126) Mittel (16, 24, 28) zum Befestigen an dem Motorgehäuse (12) umfasst.
  17. Vorrichtung nach Anspruch 16,
    dadurch gekennzeichnet, dass die Befestigungsmittel einen feststehenden Arm (16) umfassen, der aus dem Motorgehäuse (12) hervorsteht und an einem Ende (22) einen Hohlzapfen (24) starr hält, der abnehmbar in einen komplementären Sitz (28) der Haltestruktur (26, 126) eingeführt ist.
  18. Vorrichtung nach Anspruch 17,
    dadurch gekennzeichnet, dass der komplementäre Sitz (28) einen Längsschlitz (30) auf seiner Wand hat und dass die Arretierung der Haltestruktur (26, 126) auf dem Hohlzapfen (24) mittels Befestigungsschrauben erreicht wird, die in ein tangentiales Loch (82) eingeführt sind, das in einem Rand das Schlitzes (30) gebildet ist, und in entsprechende Gewindelöcher (84) eingreifen, die auf dem gegenüberliegenden Rand vorhanden sind.
  19. Vorrichtung nach Anspruch 17,
    dadurch gekennzeichnet, dass eine der Endbuchsen der Auslass (64) des Hohlzapfens (24) ist.
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 EP1367157A1 (de) 2003-12-03
EP1367157B1 true 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)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20020489A1 (it) * 2002-06-11 2003-12-11 Lgl Electronics Spa Dispositivo di frenatura del filato per macchine tessili.
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

Family Cites Families (7)

* 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
IT1303154B1 (it) * 1998-07-17 2000-10-30 Lgl Electronics Spa Dispositivo perfezionato di frenatura modulata del filato di trama permacchine tessili.
NL1011171C1 (nl) * 1999-01-29 2000-08-01 Te Strake Bv Weefmachine met een inlooprem.
EP1095893B9 (de) * 1999-10-26 2005-05-11 L.G.L. Electronics S.p.A. Schussfadenbremse, insbesondere für Webmaschinen

Also Published As

Publication number Publication date
ITTO20020460A0 (it) 2002-05-30
DE60309776T2 (de) 2007-09-13
EP1367157A1 (de) 2003-12-03
CN1461835A (zh) 2003-12-17
ITTO20020460A1 (it) 2003-12-01
DE60309776D1 (de) 2007-01-04
CN100513662C (zh) 2009-07-15

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