EP1422329A1 - Dispositif pour la détection de fils alimentés aux aiguilles de métiers à tricoter, notamment ceux de bas - Google Patents

Dispositif pour la détection de fils alimentés aux aiguilles de métiers à tricoter, notamment ceux de bas Download PDF

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Publication number
EP1422329A1
EP1422329A1 EP03425468A EP03425468A EP1422329A1 EP 1422329 A1 EP1422329 A1 EP 1422329A1 EP 03425468 A EP03425468 A EP 03425468A EP 03425468 A EP03425468 A EP 03425468A EP 1422329 A1 EP1422329 A1 EP 1422329A1
Authority
EP
European Patent Office
Prior art keywords
yarn
needles
machine
work
yarn guide
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.)
Withdrawn
Application number
EP03425468A
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German (de)
English (en)
Inventor
Fulvio Sangiacomo
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.)
Sangiacomo SpA
Original Assignee
Sangiacomo 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 Sangiacomo SpA filed Critical Sangiacomo SpA
Publication of EP1422329A1 publication Critical patent/EP1422329A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
    • D04B35/14—Indicating, warning, or safety devices, e.g. stop motions responsive to thread breakage
    • D04B35/16—Indicating, warning, or safety devices, e.g. stop motions responsive to thread breakage with detectors associated with a series of threads

Definitions

  • the present invention concerns the knitting machines in general, and in particular a control device for the presence of yarns being supplied to the needles of circular knitting and hosiery machines and to stop the machine if there is a lack in the feeding of yarn.
  • Circular knitting and hosiery machines usually have a rotating cylinder and use needles located on said cylinder and each provided with a tongue movable between open and close position.
  • the stitch is made by supplying the needles with one yarn. If this yarn, for whatever reason, breaks or fails to be supplied, the tongue of the needles remain open, protrude due to centrifugal force and a mechanical sensor reveals their presence, causing the machine to stop.
  • one needle is fed by two or more yarns supplied from respective different yarn guides, each movable between idle and working positions. Consequently , in the case of breakage or lack of feeding even of only one of the two yarns, the needle tongue continues to work normally with the yarn which is available, therefore the machine is not stopped and continues to proceed to produce faulty manufactured articles which have to be rejected.
  • the system includes sensors associated with the various yarns and a computer which manages these sensors and which stop the machine if, during production of each successive manufactured article, a variation in flow is detected even in one yarn, either because it is broken or there is a lack of feeding.
  • This system involves however the use of sensors, which must send signals to a computer corresponding to the flow of the various yarns during the production of the first manufactured article, and software and programming to compare the successive flows of the yarns with those which have been memorised and to stop the machine should a variation be found.
  • each time the article to be made is changed, all the manufacturing process for the new article has to be memorised.
  • This invention is aimed at resolving the above mentioned problem in a new and original way and above all in a way which is much simpler and economic.
  • One of the objects of this invention is in fact, to provide a system to control the presence of the yarns being fed in combination to the needles of a circular hosiery and knitting machine, which neither requires self-learning on the part of the machine nor consequently sophisticated electronics, and which is completely independent of the characteristics of the manufactured article to be made and/or from the fact that this may be modified or replaced by a new one.
  • This object is achieved, according to the invention, by associating each yarn being fed to the needles of a textile machine through a yarn guide, with a sensor capable of detecting flow/presence of the yarn itself, and stopping the machine when the yarn guide is moved from an idle position to a feeding position and the sensor does not detect flow of the relative yarn.
  • the type of circular hosiery or knitting machine taken into consideration here usually includes a cylinder 11 housing needles 12 controlled and moving in the known way, to collect one or more yarns 13 to be knitted according to a knitting programme.
  • Each yarn 13 comes from a respective reel 14 and is guided and supplies the needles 12 through a yarn guide 15 which moves between an out of work, idle position A, at a certain distance from the needles, and a work position B close to the needles, as shown in the drawing.
  • the yarn guide 15 When the yarn guide 15 is in the out of work, idle position A, the yarn 13 is not fed to the needles 12, remaining in this way excluded from the knitting process; on the other hand the yarn guide 15 is placed in work position B when the relative yarn is required to feed the needles and knitted alone or together with at least one other yarn, as in the case of "in vanisè" manufacture, for example.
  • yarn 13, being fed to each yarn guide 15, is associated with a sensor 16 able to detect the flow, and consequently also the presence of the yarn to the yarn guide.
  • the sensor 16 which can be of a known type, is connected to the electric circuit of the motor which drives and controls the cylinder 11 rotation and to the means which cause the in and out of work movements of the yarn guide 15.
  • the senor is devised and acts in combination with the yarn guide 15 to keep the electric circuit on the motor closed so that the latter and therefore the machine operate when the yarn guide is in the work position and the yarn, on flowing, regularly passes through the yarn guide and consequently supplies the needles for a correct formation of the stitches.
  • the sensor does not detect flow/presence of the yarn when the respective yarn guide passes from the out of work, idle position to the work position, it causes the electric circuit on the motor to open and stop the machine so as to prevent the manufacture of faulty articles and rejects due to the lack of supply of the yarn.
  • a knitting or hosiery textile machine is stopped when any yarn guide is placed in the work position to feed the needles on the cylinder and the related sensor does not detect movement of the yarn to the yarn guide itself.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP03425468A 2002-11-25 2003-07-15 Dispositif pour la détection de fils alimentés aux aiguilles de métiers à tricoter, notamment ceux de bas Withdrawn EP1422329A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS20020108 2002-11-25
IT000108A ITBS20020108A1 (it) 2002-11-25 2002-11-25 Sistema di controllo della presenza dei fili alimentati agli aghi in

Publications (1)

Publication Number Publication Date
EP1422329A1 true EP1422329A1 (fr) 2004-05-26

Family

ID=32211379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03425468A Withdrawn EP1422329A1 (fr) 2002-11-25 2003-07-15 Dispositif pour la détection de fils alimentés aux aiguilles de métiers à tricoter, notamment ceux de bas

Country Status (3)

Country Link
US (1) US20040099017A1 (fr)
EP (1) EP1422329A1 (fr)
IT (1) ITBS20020108A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103469471A (zh) * 2013-09-10 2013-12-25 江苏金龙科技股份有限公司 纱线张力调整装置的断纱信号触发机构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2158107A (en) * 1984-05-02 1985-11-06 Gustav Memminger Yarn feeding apparatus for yarn-processing textile machines such as circular knitting machines
GB2162971A (en) * 1984-08-08 1986-02-12 Gustav Memminger Textile machinery yarn supply apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2055610A (en) * 1935-03-19 1936-09-29 Mishcon Samuel Multiple circuit breaking device for knitting machines
US3388565A (en) * 1966-04-25 1968-06-18 Singer Co Stop motion with built-in slub catcher
NL7414045A (nl) * 1973-12-18 1975-06-20 Chomarat & Cie Werkwijze en inrichting voor het voeden van een textielmachine, zoals een rondbreimachine, met een draad onder constante spanning.
US4551591A (en) * 1984-06-18 1985-11-05 Jones Robert E Stop motion switch
DE3733797C1 (de) * 1987-10-07 1989-04-06 Sipra Patent Beteiligung Fadenspeicher- und -liefervorrichtung fuer Textilmaschinen,insbesondere Strickmaschinen
US4882916A (en) * 1989-03-02 1989-11-28 Jones Robert E Knitting machine stop motion activator
US5005503A (en) * 1989-12-12 1991-04-09 Peerless Carpet Corporation Broken yarn detector for multiple yarn manipulating machines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2158107A (en) * 1984-05-02 1985-11-06 Gustav Memminger Yarn feeding apparatus for yarn-processing textile machines such as circular knitting machines
GB2162971A (en) * 1984-08-08 1986-02-12 Gustav Memminger Textile machinery yarn supply apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103469471A (zh) * 2013-09-10 2013-12-25 江苏金龙科技股份有限公司 纱线张力调整装置的断纱信号触发机构

Also Published As

Publication number Publication date
US20040099017A1 (en) 2004-05-27
ITBS20020108A1 (it) 2004-05-26

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