EP0340863B1 - Dispositif pour déposer une reserve de fil sur une bobine vide. - Google Patents

Dispositif pour déposer une reserve de fil sur une bobine vide. Download PDF

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Publication number
EP0340863B1
EP0340863B1 EP89201111A EP89201111A EP0340863B1 EP 0340863 B1 EP0340863 B1 EP 0340863B1 EP 89201111 A EP89201111 A EP 89201111A EP 89201111 A EP89201111 A EP 89201111A EP 0340863 B1 EP0340863 B1 EP 0340863B1
Authority
EP
European Patent Office
Prior art keywords
yarn
reserve
tube
winding
extraction
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
EP89201111A
Other languages
German (de)
English (en)
Other versions
EP0340863A1 (fr
Inventor
Donato Castellarin
Francesco Ferro
Luigi Colli
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 EP0340863A1 publication Critical patent/EP0340863A1/fr
Application granted granted Critical
Publication of EP0340863B1 publication Critical patent/EP0340863B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/28—Traversing devices; Package-shaping arrangements
    • B65H54/34—Traversing devices; Package-shaping arrangements for laying subsidiary winding, e.g. transfer tails
    • B65H54/343—Traversing devices; Package-shaping arrangements for laying subsidiary winding, e.g. transfer tails when starting winding on an empty bobbin
    • 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 presence is placed of a yarn-tensioner runner anchored, as an enbloc body, to the end of an arm lever which belongs, as an operating element, to the unit suitable for guiding and depositing some windings of reserve yarn on an area close to an end of a tube without wound yarn.
  • the invention can be applied, in particular, to a rotor-spinning unit during the cycle of doffing of a full bobbin, in order to constitute a compact yarn reserve of fine string-like character.
  • the present invention makes it possible the reserve turns to be given a high enough tension and them to be given, in their geometric arrangement of deposit, that bond cohesion and mutual penetration, which secures a difficultly looseable and unwindable compactness.
  • the tension of the yarn plays an important role in the formation of the reserve windings.
  • a too low tension can originate an unstable reserve string, which will tend to loosen, originating the so-said " fallen turns” with dangling yarn lengths which, in their turn, cause entanglements of yarns belonging to different bobbins conveyed by a same conveyor belt, or to a same storage.
  • the yarns dangling from the bobbins furthermore originate undesired deposits around the various members of the belt conveyors, or around similar elements, often hindering, and, in extreme cases, even blocking the same conveyor units.
  • the reserve windings which collapse cause therefore disorders in the conveyances and entanglements of yarns in the storages of the cheeses, of wound yarn units, and cause as well difficulties in the downstream operations when the reserve length is absent, or is broken, or is pulled away (on the creel, the units of wound yarn, i.e., the cheeses, are jointed to each other by using the yarn length obtained from the unwinding of the reserve turns).
  • Awound yarn unit must be capable of maintaining the reserve turns wound around the tube even after a considerable amount of handling, making it possible the yarn to be quickly unwound in all of the subsequent operations, which contemplate the redrawing of the yarn.
  • Said wound yarn unit can be of any geometrical shapes, and in the present specification, and in the appended claims, it will be simply denominated as “bobbin” or “cheese”, with both above terms being used interchangeably.
  • the causes of an insufficiently high tensioning derive from the difference between the speed of the extraction roll, which reaches nearly instantaneously its steady-state value, and the collection speed, which has a less steep acceleration slope.
  • the roller-roll extraction pair is preset at a revolution speed which is related to a helical winding mode, i.e., with a deposition speed which is the sum of the revolution speed of the drive roller and of the translational speed imposed by the yarn-guide element.
  • the speed of deposition of the reserve turns which are arranged on the tube in a nearly circumferential pattern, is approximately equal to the revolution speed of the drive roller, and is therefore consideraly lower than said deposition speed with helical turns.
  • a yarn guide and a yarn brake are provided, which are shiftable by means of a rack-pinion mechanism, but from this document no information about the structure and/or function of said means can be deduced, nor are there disclosed means for adjusting the braking force.
  • a semiautomatic device for depositing the yarn reserve on empty winding tubes which device comprises a shaped disc fixed to one of the tube supporting arms, on the inner side of said disc a shaped plate having a yarn guiding slit is mounted and a spring also fixed on the inner site of disc cooperates with plate to tension the running yarn during depositing of the yarn reserve on the tube.
  • the yarn tensioning means is rigidly connected with the tube supporting arm and for depositing the yarn reserve the yarn must be inserted manually ant after formation of the yarn reserve the yarn must be again disengaged manually. Furthermore, no means is disclosed for adjusting the tensioning force.
  • the device for practicing the present invention overcome such drawbacks by means of an original solution, which eliminates any possibilities that not enough tensioned reserve windings may be formed, in that it exploits the action performed by a yarn-tensioning runner, which is positioned between the extraction pair and the winding unit, for a time necessary for the reserve to be formed.
  • a further advantage of the herein disclosed device, as compared to the prior art, is its extreme structural simpleness, from which operating steps endowed with considerably high reliability derive.
  • Both the case and the arm levers 10 and 15 are housed on the slider carrying the automatic units, running along the machine fronts during its patrolling action, and schematically shown in chain 37; 19 is the arrow which indicates the revolutionary movement of disengagement of the end of the arm 10, and therefore of the yarn-tensioning runner 9, from the yarn 11 at the end of the formation of the reserve yarn turns 1, deposited in a compact, fine string-like pattern;
  • Said slider unit is made mobile along the spinning front(s); by means of running ways comprising one or more rails, of any shapes, cooperating with suitable rolling means.
  • the slider unit is continuously driven in front of the line of the spinning units, reciprocating in order to perform its patrolling function. Whenever on one of the spinning units 8, the yarn reaches the pre-established length to be collected on the tube 22, said spinning unit stops and emits a signal by means of photo-cells.
  • the slider unit when running before the spinning unit, stops also, and a member provided on the slider unit hooks the bobbin-carrier frame 21, opening the reception elements 20.
  • the bobbin, full of wound yarn, is conveyed to the discharge conveyor belt.
  • the tube-taking device takes a tube without wound yarn from the tube distributor, and consigns it to the unit which will force the tube on the bobbin-carrier frame 21.
  • the sequence (known from the prior art) of the operating steps for yarn re-fastening starts.
  • the resetting lever 6 of the release unit is actuated, obliging the extraction roller 2 to approach to, and press against, the extraction roll 4, enabling the extraction of the yarn 11 from the spinning unit 8 to take place and therefore restoring the spinning process.
  • the slider by means of its operating elements, inserts the tube 22 between the reception elements 20, which are closed, locking the yarn 11.
  • the mechanisms contained inside the carter 16 activate the arms 15 and 10 inserting them with their ends through the path along which the yarn 11 runs.
  • the actuator 3 is activated and pushes, by means of the stem 36, the yarn-tensioning runner 9 in order to press the underlying yarn 11 against the flat end 7 of the arm lever 10.
  • the arm 15 reversing its reciprocating direction, guides the yarn 11 collecting it on the tube 22 as an upper wide turn, which furthermore ties the whole of the underlying reserve turns.
  • the yarn-tensioning runner 9 is disabled by shifting the stem 36 upwards according to the arrow 3b, and at the same time the arm lever 10 rotates, according to the direction as indicated by the arrow 19, disengaging its end from the yarn 11. This latter, being free to be clamped by the yarn-guide element 24 starts forming the first layer of turns of wound yarn of the bobbin under way of formation.
  • Tests carried out by the present Applicant have demonstrated the perfect repeatibility and the extremely high reliability of the above disclosed device, as developed and disclosed in the present invention, for depositing a compact, fine string-like reserve of yarn, which is difficult to be loosened and unwound.
  • the advantage of the herein proposed device is that the deposition of the turns in order to form the reserve of yarn takes place always in the presence of the necessary tension for realizing a reserve of yarn arranged in a Compact fine string-like configuration, therefore not prone to be loosened during the successive transports, or the internal handling inside the manufacturing bays, of the bobbin full of wound yarn.

Landscapes

  • Spinning Or Twisting Of Yarns (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Claims (2)

1. Dispositif destiné à déposer une réserve de fil (1) sur un tube de bobinage vide (22) dans un poste de filature, au cours du cycle d'évacuation d'une bobine pleine, dans lequel ledit poste de filature comprend un rotor de filature (9), une unité d'enroulement ainsi qu'une unité d'extraction composée d'un rouleau d'extraction (4) et d'un rouleau presseur (2), interposée entre le rotor de filature (8) et l'unité d'enroulement, le dispositif comprenant un moyen de guidage et de freinage de fil (7, 9,10) destiné à guider le fil (11) délivré par ladite unité d'extraction (2, 4) jusqu'à une des extrémités d'un tube d'enroulement vide (22) positionné dans ladite unité d'enroulement et à appliquer une tension au fil (11) entre ladite unité d'extraction et ladite unité d'enroulement, caractérisé en ce que ledit moyen de guidage et de freinage de fil est un levier(10) comportant une extrémité plate (7) sur laquelle le fil (11) défile pendant que la réserve de fil (1) est déposée sur le tube d'enroulement (22), ledit levier (10) pouvant être mis en rotation de manière à amener son extrémité plate (7) en contact avec le fil (11), ou à l'écarter de celui-ci, et portant un galet (9) de tension de fil coopérant avec ladite extrémité plate (7) pour serrer le fil (11) en train de défiler avec une force réglable, un moyen d'actionnement (3) étant installé afin d'activer et de désactiver ledit galet (9) de tension de fil.
2. Dispositif selon la revendication 1, caractérisé en ce que ledit galet (9) de tension de fil est activé par une force de nature électromagnétique, ou bien par une force élastique, ou encore par une force générée par la pression d'un fluide, la valeur de ladite force étant réglable par des moyens connus.
EP89201111A 1988-05-06 1989-05-01 Dispositif pour déposer une reserve de fil sur une bobine vide. Expired - Lifetime EP0340863B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2049788 1988-05-06
IT20497/88A IT1217527B (it) 1988-05-06 1988-05-06 Procedimento e dispositivo per depositare una riserva di filo su un tubetto privo di filo avvolto

Publications (2)

Publication Number Publication Date
EP0340863A1 EP0340863A1 (fr) 1989-11-08
EP0340863B1 true EP0340863B1 (fr) 1992-12-30

Family

ID=11167827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89201111A Expired - Lifetime EP0340863B1 (fr) 1988-05-06 1989-05-01 Dispositif pour déposer une reserve de fil sur une bobine vide.

Country Status (4)

Country Link
EP (1) EP0340863B1 (fr)
CZ (1) CZ283161B6 (fr)
DE (1) DE68904107T2 (fr)
IT (1) IT1217527B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100570027C (zh) * 2003-10-16 2009-12-16 Savio纺织机械责任有限公司 用于在自由端纺纱机的纡管上沉积一定裕量纱线的装置和方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20050605A1 (it) 2005-04-11 2006-10-12 Savio Macchine Tessili Spa Dispositivo di gestione del filo per carrelli di servizio per filatoi open-end
ITMI20110978A1 (it) 2011-05-30 2012-12-01 Savio Macchine Tessili Spa Dispositivo di aspirazione per carrelli di servizio per filatoi open-end
CN109466970B (zh) * 2018-11-29 2021-04-06 象山邱工联信息技术有限公司 线缆收卷装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR610326A (fr) * 1926-02-02 1926-09-03 Régulateur de tension pour rouet de guimperie
IT1038428B (it) * 1975-05-26 1979-11-20 Nuova San Giorgio Spa Procedimento e dispositivo per l avvolgimento di una riserva di filato su un tubo per rocche
DE2701985C2 (de) * 1977-01-19 1986-07-03 W. Schlafhorst & Co, 4050 Mönchengladbach Vorrichtung zum Herstellen einer Fadenreserve
JPS5841266B2 (ja) * 1978-03-20 1983-09-10 株式会社豊田自動織機製作所 オ−プンエンド精紡機におけるトランスフアテ−ル巻形成装置
DE3210309A1 (de) * 1982-03-20 1983-09-22 W. Schlafhorst & Co, 4050 Mönchengladbach Tellerfadenbremse
DE8713749U1 (de) * 1987-10-13 1987-12-10 Elitex koncern textilního strojírenství, Reichenberg/Liberec Fadenbremse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100570027C (zh) * 2003-10-16 2009-12-16 Savio纺织机械责任有限公司 用于在自由端纺纱机的纡管上沉积一定裕量纱线的装置和方法

Also Published As

Publication number Publication date
IT1217527B (it) 1990-03-22
CZ283161B6 (cs) 1998-01-14
CS8902749A2 (en) 1991-08-13
EP0340863A1 (fr) 1989-11-08
DE68904107T2 (de) 1993-05-27
DE68904107D1 (de) 1993-02-11
IT8820497A0 (it) 1988-05-06

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