EP0322008B1 - Vorrichtung zum Aufsuchen eines gerissenen Fadenendes auf einer im Aufbau befindlichen Fadenwicklung - Google Patents

Vorrichtung zum Aufsuchen eines gerissenen Fadenendes auf einer im Aufbau befindlichen Fadenwicklung Download PDF

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Publication number
EP0322008B1
EP0322008B1 EP88202694A EP88202694A EP0322008B1 EP 0322008 B1 EP0322008 B1 EP 0322008B1 EP 88202694 A EP88202694 A EP 88202694A EP 88202694 A EP88202694 A EP 88202694A EP 0322008 B1 EP0322008 B1 EP 0322008B1
Authority
EP
European Patent Office
Prior art keywords
yarn
package
cone
suction
nozzles
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
EP88202694A
Other languages
English (en)
French (fr)
Other versions
EP0322008A1 (de
Inventor
Sandro Sartoni
Giovanni Verlicchi
Francesco Carati
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.)
Savio SpA
Savio Macchine Tessili SpA
Original Assignee
Savio SpA
Savio Macchine Tessili 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 Savio SpA, Savio Macchine Tessili SpA filed Critical Savio SpA
Publication of EP0322008A1 publication Critical patent/EP0322008A1/de
Application granted granted Critical
Publication of EP0322008B1 publication Critical patent/EP0322008B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • 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 device for seeking and withdrawing a broken yarn end on a package being formed in order to unwind a yarn length sufficient to allow a rejoining operation to take place for automatically reinstating the spinning process in a continuous ring spinning machine.
  • One of the improvements towards which the present invention tends is in the seeking and withdrawal of a broken yarn end on a package being formed, from which a length is unwound sufficient to complete the rejoining cycle with maximum reliability and speed of implementation, and avoiding any need for unproductive repetition of the operation.
  • Said known devices either do not ensure perfect preparation of the yarn under all conditions, or require a considerable use of blown air, or comprise blowing nozzles or sucker elements mounted in a fixed position and therefore unable to be operationally adapted to the variable position of the formation cone on whose surface the broken yarn end to be withdrawn is retained. It is apparent that in this latter case the separation action of the blowing nozzles or sucker elements extends only partly over the surface of the formation cone, or in the limit not at all, with the result that the yarn withdrawal device does not operate effectively.
  • blower and/or sucker elements aided by blades of various materials which rub against the package surface, ie against the wound yarn layers, in an attempt to release the broken yarn end.
  • FR-A-2 216 208 discloses a device for seeking and withdrawing a yarn end from a package, having the features of the preamble of claim 1.
  • the nozzles are arranged concentrically to each other with a component direction in the axial direction of the package, so as to direct the air current onto the external surface of the package and release the yarn end without the need of simultaneously causing the package to be rotated. The released end is then sucked into the suction tube.
  • the location of the nozzles which act substantially on a same circle, may however not be able to withdraw the yarn under any circumstances. To be sure to reach effective withdrawal it may be necessary to continuously vary the position of the package relative to the nozzles by moving the package up and down. This, on the other hand, may cause uncertainty about the real length of yarn withdrawn and may create problems in the subsequent joining stage, besides complicating the construction of the device.
  • the object of the present invention is to provide a device by which the broken yarn end adhering to the surface of the package formation cone is reliably released and at the same time a yarn portion of sufficient length is unwound to complete the rejoining cycle by which the spinning operation can go to completion.
  • a further object of the invention is to provide a device which when compared to the devices of the known art is constructionally simple and allows the necessary adjustments to be easily made as the geometrical parameters of the package being formed vary and as the type of yarn being wound varies.
  • a device according to the present invention has the features claimed in claim 1.
  • the device may also comprise a control mechanism arranged both to vertically move a package support peg upwards or downwards and to intermittently rotate said support peg to subject the entire surface of the formation cone to the action of the air jets from the blowing nozzles.
  • the control source for rotating the peg and thus the bobbin may provide two rotary movements: firstly a slow rotation for seeking the end of the yarn and extricating it from the wound layers of the formation cone, and then a sufficiently rapid rotation to release into the suction duct the yarn length required for rejoining, this rapidity resulting not only in a reduction in the cycle time but also preventing the yarn fibrillating substantially under the action of the air stream.
  • the pipes of the blowing nozzles may be coupled to respective guide supports fixed to the outer surface of the suction cap, the couplings allowing the pipes both to slide vertically and to rotate angularly to be able to perfectly adjust the operating directions of the air jets blowing against the zone in which the broken yarn end is to be found, on the basis of the dimensions of the package formation cone and the type of yarn wound.
  • control mechanism located at the base of the package support peg may be able to generate an oscillatory reciprocating motion of limited amplitude straddling the position which the formation cone has assumed, this being done while the package is being rotated about its axis and in the opposite direction to the yarn winding.
  • FIG. 1 designates the blowing nozzles which are located to surround the formation cone 5 and which operate by blowing jets of air onto the surface of the formation cone 5.
  • Respective position-adjustable pipes 2 of the blowing nozzles 1 are supported by a suction cap 3 under which the upper end of the package 7 is located.
  • Said cap has its lower profile located above the air jets of the nozzles 1 and tapers upperly to engage a suction duct 6 which extends up to a block 4 containing, in a first zone, sensing members for the yarn 8 and, in a second zone, cutting elements 12.
  • This block 4 is the source of an air stream for conveying the end of the yarn 8 through a photo-electric or inductive sensor 9 and into a gap between the cutting blades of the scissor elements 12.
  • the suction duct 6 is of a length substantially equal to the length of yarn to be unwound and sucked from the package 7, and connects the suction cap 3 to the block 4.
  • the yarn 8 sucked from the package 7 is unwound by a length sufficient to allow the sucked yarn to be sensed by a light barrier 10 arranged in the block 4.
  • the package 7 being formed is held by a peg 11.
  • the scissor elements 12 are so positioned to remove the excess yarn so that the portion of sucked yarn 8 is of a suitable length for rejoining as required for reinstatement of the spinning process.
  • Two optical sensors 14, one emitting and one receiving, are disposed facing each other to form an optical light curtain which when interrupted by the formation cone 5 halts the upward movement of the package 7 being formed to position it correctly under the suction cap 3.
  • a control mechanism block 15 of known type is able to move the support peg 11 for the package 7 vertically upwards and downwards and also able to rotate said peg 11 in the opposite direction to that in which the yarn is being wound so as to disengage and release the broken yarn end reliably and rapidly.
  • Said mechanism 15 is also able to generate, pneumatically or electrically, a reciprocating oscillatory movement of limited amplitude about the position established by the optical sensors 14 to enable the formation cone 5 to be struck by the air jets of the nozzles 1 more effectively.
  • a locking screw 16 for each pipe 2 allows, when slackened, the exact positioning of the blowing nozzle 1 on a guide support 21 by axially and angularly adjusting each nozzle 1 relative to the formation cone 5 such that each air jet strikes the formation cone 5 with high efficiency and in collaboration with the other nozzles.
  • 18 is the direction of rotation of the support peg 11 and thus of the package 7 by the block 15, this direction being advantageously the opposite of that in which the yarn 8 is wound onto the package 7 being formed;
  • 20 is the arrow indicating the vertical raising of the package 7 until its formation cone 5 interrupts the light beam extending between the optical sensors 14.
  • the guide support 21 for the pipes 2 is fixed to the outer surface of the suction cap 3.
  • Said carriage is movable along the spinning machine on runways comprising one or more rails of any shape, cooperating with suitable rolling means such as wheels, rollers or equivalent means.
  • suitable rolling means such as wheels, rollers or equivalent means.
  • the yarn rejoining carriage is driven to and fro to patrol along the spindles.
  • the carriage apparatus checks by sensor means known in the art whether the yarn is present or not in each spinning spindle.
  • the carriage When it detects the lack of one of the yarns the carriage is halted at the spindle where the yarn has been found to be broken and the mechanism for initiating the rejoining procedure is started.
  • This procedure involves stopping the spindle and extracting the package 7 being formed from the spindle line and locating it on the support peg 11 inside the carriage apparatus in a position suitable for seeking and withdrawing the broken yarn end.
  • the peg 11 together with the block 15 of the control mechanism are located in a lower waiting position.
  • the control mechanism 15 When the package 7 has been mounted on the peg 11 the control mechanism 15 is operated to vertically raise the package 7 being formed in the direction of the arrow 20 until its formation cone 5 intercepts and obscures the light beam or optical curtain between the facing sensors 14.
  • the blowing nozzles 1 When the light beam is intercepted the blowing nozzles 1 are activated and at substantially the same time the control mechanism 15 effects the rotation of the package 7 in the direction of the arrow 18 and suction is applied to the cap 3 and duct 6, this latter being connected to a vacuum pump or similar member, or to any air suction main.
  • the rotation of the package 7 enables its entire frusto-conical surface 5 to be effectively exposed to the air jets leaving the nozzles 1, which by virtue of their overall helical arc arrangement create an air current of ascending vortex type.
  • the rotation of the package 7 is advantageously of increasing intensity, ie initially it comprises a few slow rotations necessary to give the blowing nozzles 1 time to disentangle the broken yarn end from the formation cone 5 followed a moment after by a rotation sufficiently rapid to drag along the suction duct the length necessary for passing the yarn 8 through the light barrier 10 and through the scissor elements 12.

Claims (4)

  1. Vorrichtung zum Aufsuchen und Herausziehen eines gerissenen Fadenendes einer im Aufbau befindlichen Fadenwicklung (7) und Ansaugen einer Fadenlänge, die benötigt wird, um einen Wiederanspinnvorgang zum automatischen Wiederingangsetzen des Spinnvorgangs einer Endlosspinnmaschine stattfinden zu lassen, mit:
    - einer Reihe von Blasdüsen (1), die so angeordnet sind, daß sie den Fadenwicklungskegel (5) umgeben;
    - einer Saugkappe (3), deren untere Kontur oberhalb der durch die Düsen (1) erzeugten Luftstrahlen angeordnet ist;
    - einem Saugkanal (6) in Fluidverbindung mit der Saugkappe (3) zur Aufnahme einer für den anschließenden Wiederanspinnvorgang von der Fadenwicklung (7) abgewickelten und angesaugten Länge eines Fadens (8);
    dadurch gekennzeichnet daß:
    - die Düsen (1) entlang einer Linie angeordnet sind, die geometrisch einer Schraubenlinie ähnelt;
    - ein Block (4) durch den Saugkanal (6) mit der Saugkappe (3) verbunden ist, wobei der Block (4) eine erste Zone zum Erfühlen des Fadens (8) mittels einer Lichtschranke oder eines elektrischen Feldes (9, 10) und eine zweite Zone hat, die durch die erste Zone gesteuert ist und eine Schneideinrichtung (12) zum Abschneiden des Endes des angesaugten Fadens (8) an einer Stelle aufweist, die im wesentlichen der zum Wiederanspinnen benötigten Länge des Fadens (8) entspricht; und
    - zwei einander zugekehrte optische Sensoren (14) vorhanden sind, die einen Lichtschrankenstrahl zur Wahrnehmung des Vorhandenseins eines Fadenwicklungskegels (5) erzeugen, um den Kegel (5) entlang der Schraubenlinie der Blasdüsen (1) in Stellung zu bringen.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie zusätzlich eine Steuerung sowohl zum vertikal nach oben und nach unten Verschieben eines Fadenwicklungsstützdorns (11) bezüglich der Saugkappe (3) als auch zum zeitweiligen Drehen des Stützdorns (11) um seine Achse aufweist, um die gesamte Oberfläche des Kegels (5) der Wirkung der Luftstrahlen aus den Blasdüsen (1) auszusetzen.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Rohre (2) der Blasdüsen (1) in entsprechenden Stützführungen (21), die an der Außenfläche der Saugkappe (3) befestigt sind, axial verschiebbar und winkelmäßig drehbar sind, um die Wirkrichtungen der gegen den Fadenwicklungskegel (5) blasenden Luftstrahlen hinsichtlich der Gestalt und Abmessungen des Fadenwicklungskegels (5) und der Art des aufgewickelten Fadens (8) einzustellen.
  4. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Stützdorn (11) zusätzlich in einer oszillierenden Hin- und Herbewegung begrenzter Amplitude bewegbar ist, die die Stellung überstreicht, die der Kegel (5) durch die Funktion der optischen Sensoren (14) eingenommen hat, während die Fadenwicklung (7) um ihre Achse in der Richtung (Pfeil 18) entgegen der Fadenaufwickelrichtung drehbar ist.
EP88202694A 1987-12-18 1988-11-25 Vorrichtung zum Aufsuchen eines gerissenen Fadenendes auf einer im Aufbau befindlichen Fadenwicklung Expired - Lifetime EP0322008B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT23088/87A IT1223532B (it) 1987-12-18 1987-12-18 Dispositivo per la ricerca del capo di filo spezzato su una spola in formazione
IT2308887 1987-12-18

Publications (2)

Publication Number Publication Date
EP0322008A1 EP0322008A1 (de) 1989-06-28
EP0322008B1 true EP0322008B1 (de) 1992-09-09

Family

ID=11203653

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88202694A Expired - Lifetime EP0322008B1 (de) 1987-12-18 1988-11-25 Vorrichtung zum Aufsuchen eines gerissenen Fadenendes auf einer im Aufbau befindlichen Fadenwicklung

Country Status (5)

Country Link
EP (1) EP0322008B1 (de)
DE (1) DE3874505T2 (de)
ES (1) ES2035911T3 (de)
GR (1) GR3005980T3 (de)
IT (1) IT1223532B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5630559A (en) * 1994-08-10 1997-05-20 W. Schlafhorst Ag & Co. Device for locating a free end of yarn wound on a cop

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104213320B (zh) * 2014-08-20 2016-05-18 浙江保利针织有限公司 针织机中的过线装置
CN107381232A (zh) * 2017-08-31 2017-11-24 山东华兴纺织集团有限公司 纱尾找头装置及自络找头机

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2210469A1 (de) * 1972-03-04 1973-09-06 Zinser Textilmaschinen Gmbh Einrichtung zum abnehmen von auf fadenwicklungskoerpern befindlichen fadenenden
CH569656A5 (de) * 1973-02-02 1975-11-28 Heberlein Hispano Sa
DE3013174A1 (de) * 1980-04-03 1981-10-15 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Vorrichtung zum pneumatischen abloesen und ansaugen des gebrochenen fadenendes
US4576341A (en) * 1982-03-08 1986-03-18 Murata Kikai Kabushiki Kaisha Cop transporting systems for an automatic winder
DE3314278A1 (de) * 1983-04-20 1984-10-25 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Fadenende-abblasduese
DE3316108A1 (de) * 1983-05-03 1984-11-08 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Abblasduese
JPS6290338A (ja) * 1985-10-14 1987-04-24 Kurabo Ind Ltd オ−プンエンド精紡機における満管チ−ズの糸尻吹き払い装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5630559A (en) * 1994-08-10 1997-05-20 W. Schlafhorst Ag & Co. Device for locating a free end of yarn wound on a cop

Also Published As

Publication number Publication date
IT8723088A0 (it) 1987-12-18
ES2035911T3 (es) 1993-05-01
EP0322008A1 (de) 1989-06-28
DE3874505D1 (de) 1992-10-15
DE3874505T2 (de) 1993-02-04
GR3005980T3 (de) 1993-06-07
IT1223532B (it) 1990-09-19

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