EP0322008A1 - 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
EP0322008A1
EP0322008A1 EP88202694A EP88202694A EP0322008A1 EP 0322008 A1 EP0322008 A1 EP 0322008A1 EP 88202694 A EP88202694 A EP 88202694A EP 88202694 A EP88202694 A EP 88202694A EP 0322008 A1 EP0322008 A1 EP 0322008A1
Authority
EP
European Patent Office
Prior art keywords
yarn
package
formation cone
suction
blowing 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.)
Granted
Application number
EP88202694A
Other languages
English (en)
French (fr)
Other versions
EP0322008B1 (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
Expired 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 forming package in order to unwind a yarn length sufficient to allow the rejoining operation to take place for automatically reinstating the spinning process in a continuous ring spinning machine.
  • 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 blower 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.
  • 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 advantage of the device compared with the known art is its constructional simplicity which allows the necessary adjustments to be easily made as the geometrical parameters of the forming package vary and as the type of yarn being wound varies.
  • the device of the present invention which comprises: - a series of blowing nozzles disposed substantially in a helical arc about the package formation cone; - a suction cap which is located above the air jets produced by said nozzles and gradually tapers from the bottom upwards to connect into a suction duct having a straightened length substantially equal to the length of yarn required to be unwound and sucked from the package for the subsequent rejoining operation needed to automatically reinstate the spinning process; - a block into which said suction duct opens and which has a first zone for sensing the yarn by means of a yarn-sensing light barrier or electric field and a second zone controlled by the first for shearing the end of the sucked yarn; - two opposing frontal optical sensors which produce a barrier light beam for sensing the presence of the package formation cone in order to position it along the helical arc of the blowing nozzles.
  • the device also comprises a control mechanism arranged both to vertically move the 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.
  • control source for rotating the peg and thus the bobbin provides 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 are coupled to guide supports, these latter fixed to the outer surface of the suction cap, said coupling 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 is 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.
  • 1 is one of the blowing nozzles which operate by blowing jets of air onto the surface of the formation cone; 2 is the position-­adjustable pipe of the blowing nozzles; 3 is the suction cap under which the upper end of the package 7 is located. Said cap tapers upperly to engage the suction duct 6; 4 is the block containing the sensing members for the yarn 8 and the cutting element 12.
  • This block is the source of an air stream for conveying the end of the yarn 8 through the photo-electric or inductive sensor 9 and into the gap between the cutting blades of the scissor elements 12;
  • 5 is the package formation cone on the surface of which the broken yarn end is retained;
  • 6 is the suction duct, which is of length substantially equal to the length of yarn to be unwound and sucked from the package, and connects the suction cap 3 to the block 4;
  • 7 is the package under formation, on the cone 5 of which the broken yarn end is sought;
  • 8 is the yarn sucked from the package 7 and unwound by a length sufficient to allow the sucked yarn to be sensed by a light barrier 10;
  • 11 is the peg which holds the forming package 7;
  • 12 are the scissor elements for removing 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;
  • 14 are the two optical sensors, one emitting and one receiving,
  • Said mechanism 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 more effectively;
  • 16 is the locking screw for the pipe 2 which when slackened allows exact positioning of the blowing nozzle 1 such that the air jet strikes the formation cone 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, this direction being advantageously the opposite of that in which the yarn 8 is wound onto the forming package 7;
  • 20 is the arrow indicating the vertical raising of the package 7 until its formation cone interrupts the light beam extending between the optical sensors 14;
  • 21 is the guide support for the pipe 2 and is fixed to the outer surface of the suction cap 3.
  • Said carriage is mobile along the spinning face 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 of the known art whether the yarn is present or not in each spinning spindle.
  • 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 18 and suction is applied to the cap 3 and duct 8, this latter being connected to a vacuum pump or similar member, or to any air suction main.
  • the rotation 18 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.
  • Said rotation 18 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 18 through the light barrier 10 and through the scissor elements 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP88202694A 1987-12-18 1988-11-25 Vorrichtung zum Aufsuchen eines gerissenen Fadenendes auf einer im Aufbau befindlichen Fadenwicklung Expired EP0322008B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=11203653

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88202694A Expired 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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4428245A1 (de) * 1994-08-10 1996-02-15 Schlafhorst & Co W Vorrichtung zum Suchen des Fadenendes am Bewicklungskegel von Kopsen
CN104213320A (zh) * 2014-08-20 2014-12-17 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

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2216208A1 (de) * 1973-02-02 1974-08-30 Heberlein Hispano Sa
CH554803A (de) * 1972-03-04 1974-10-15 Zinser Textilmaschinen Gmbh Einrichtung zum abnehmen von auf fadenwicklungskoerpern befindlichen fadenenden.
DE3013174A1 (de) * 1980-04-03 1981-10-15 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Vorrichtung zum pneumatischen abloesen und ansaugen des gebrochenen fadenendes
FR2523101A1 (fr) * 1982-03-08 1983-09-16 Murata Machinery Ltd Dispositif de transport de fuseaux pour bobinoir automatique
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
EP0219095A2 (de) * 1985-10-14 1987-04-22 Kurashiki Boseki Kabushiki Kaisha Einrichtung zum Wegblasen des Fadenendes von einer vollen Kreuzspirale, die auf einer Open-end-Spinnmaschine geformt wurde

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH554803A (de) * 1972-03-04 1974-10-15 Zinser Textilmaschinen Gmbh Einrichtung zum abnehmen von auf fadenwicklungskoerpern befindlichen fadenenden.
FR2216208A1 (de) * 1973-02-02 1974-08-30 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
FR2523101A1 (fr) * 1982-03-08 1983-09-16 Murata Machinery Ltd Dispositif de transport de fuseaux pour bobinoir automatique
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
EP0219095A2 (de) * 1985-10-14 1987-04-22 Kurashiki Boseki Kabushiki Kaisha Einrichtung zum Wegblasen des Fadenendes von einer vollen Kreuzspirale, die auf einer Open-end-Spinnmaschine geformt wurde

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4428245A1 (de) * 1994-08-10 1996-02-15 Schlafhorst & Co W Vorrichtung zum Suchen des Fadenendes am Bewicklungskegel von Kopsen
DE4428245B4 (de) * 1994-08-10 2005-04-21 Saurer Gmbh & Co. Kg Vorrichtung zum Suchen des Fadenendes am Bewicklungskegel von Kopsen
CN104213320A (zh) * 2014-08-20 2014-12-17 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

Also Published As

Publication number Publication date
IT1223532B (it) 1990-09-19
ES2035911T3 (es) 1993-05-01
GR3005980T3 (de) 1993-06-07
IT8723088A0 (it) 1987-12-18
DE3874505D1 (de) 1992-10-15
DE3874505T2 (de) 1993-02-04
EP0322008B1 (de) 1992-09-09

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