EP1880049A1 - Appareil et procede de lecture en ligne et commande de fils de chaine dans un metier a tisser - Google Patents

Appareil et procede de lecture en ligne et commande de fils de chaine dans un metier a tisser

Info

Publication number
EP1880049A1
EP1880049A1 EP06755868A EP06755868A EP1880049A1 EP 1880049 A1 EP1880049 A1 EP 1880049A1 EP 06755868 A EP06755868 A EP 06755868A EP 06755868 A EP06755868 A EP 06755868A EP 1880049 A1 EP1880049 A1 EP 1880049A1
Authority
EP
European Patent Office
Prior art keywords
loom
reading
warp threads
defect
images
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Withdrawn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
EP06755868A
Other languages
German (de)
English (en)
Inventor
Pietro Gironi
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.)
Gironi System Srl
Original Assignee
Gironi System Srl
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 Gironi System Srl filed Critical Gironi System Srl
Publication of EP1880049A1 publication Critical patent/EP1880049A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/18—Automatic stop motions
    • D03D51/20—Warp stop motions
    • D03D51/28—Warp stop motions electrical
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/004—Detection and repair of broken warp yarns

Definitions

  • the object of the present invention is an apparatus for controlling the warp threads during the manufacturing of a fabric on a loom.
  • Background art As well known, a fabric is obtained by interweaving warp threads - fed by corresponding beams and disposed parallel along the loom - with weft threads which are made to pass transverse to the warp by lifting one or more warp threads relative to the others by means of suitable devices, so- called heddles, so as to create a channel for the passage of a weft-carrying shuttle.
  • the interweaving takes place according to a scheme, so- called texture, which actually indicates the interweaving pattern and corresponds to the repetition of the warp threads jackings.
  • the formation of the fabric in a loom therefore, takes place with a continuous cycle which, by following the sequence indicated in the interweaving pattern consists of: shed formation due to warp-threads jackings; opening of a reed; insertion of wefts thread; and, finally, closing and shooting of the reed.
  • warp stops and weft stops which cut off the loom's operation upon the occurrence of anomalies, due to the breaking of threads or wefts, which breaking, if not signalled, would impair the quality of the work by generating defects and imperfections .
  • the control of warp threads has been performed in the past by means of drop wires disposed astride of stretched warp threads and crossed by rod formed by two toothed plates reciprocating in opposite direction so that, in case of thread's breaking, the corresponding drop wires would, by falling down, fix in between the teeth of the plates thereby signalling the failure of the thread.
  • the mechanical drop wires have been replaced by ones being electrically connected in such a way as to cause an electrical signal for the shut down of the loom.
  • laser sensors have been used positioned on the sides and at right angles of the warp threads to define a control line, which sensors are able to "read" the passage of a broken thread crossing the line as it falls.
  • the fabric outputting of the loom may have several types of defects which, depending on their extension, are either mended with a darning, or classified as a defect, which leads to a down-grading of the roll of finished product.
  • Such defects, more or less mendable may consist, for example, in the failure of a thread, the formation of two or more warp threads being wound up, the formation of knots, the formation of vertical scorings or thin-weft regions, and reeding' s faults. Disclosure of the Invention
  • a first object of the present invention is to overcome the drawbacks of warp-controlling devices of known type.
  • a second object is the possibility of identifying, in a repeatable and reliable manner, the defects that call for the interruption of the cycle and those that imply a different intervention such as a darning or requalification of the fabric.
  • a further object is to provide a continuous or periodic report of dissimilarity in the quality of the fabric under formation with respect to an awaited result.
  • FIG. 1, Ia and 2 show a warp-stop device of the prior art for stopping the loom in case of warp threads failure, and a detail of drop wires traditionally used as a shut down means;
  • FIG. 3 shows schematically a laser device of the prior art for checking warp threads failures
  • FIG. 4a/4b and 5a/5b show schematically a reading and control device according to the invention, in case of no failure of warp threads and, respectively, of detection of warp threads failure in a loom;
  • - Fig. 6 shows an example of texture with the interweaving report for the formation of a fabric in a loom
  • - Fig. 7 is a detail of the jacking and lowering region of the threads in a preferred embodiment of the apparatus according to the invention.
  • FIGs. 1 and 2 illustrate schematically a technical solution of known type in which drop wires 1 are disposed astride of warp threads 2 raised by heddles 10 of the loom to allow the passage of subsequent weft threads 15 which, shot by a reed 11, form a fabric 12.
  • Fig. 2 shows a drop wire 1' with metal parts 5, 6 normally separated by an insulator 7 and which are electrically connected in case of thread failure.
  • Fig. 3 shows the use, according to a known technique, of laser sensors 8 located sideway and orthogonally to the warp threads in order to define a control line 9 - upstream of heddles 10 or between the heddles 10 and the reed 11 - able "to read” the passage of a broken warp thread which crosses said line upon falling down.
  • the apparatus comprises one or more telecameras 14 (or other image-acquisition device) which, upon use, can be positioned above the reed 11 of the loom over part of or whole the work height.
  • the telecamera is disposed to frame the sequence of jackings of warp threads 2 operated by the loom's heddles according to a predetermined interweaving pattern (Fig. 6) and interfaced with an electronic support 16 for controlling the TV-shots, such as a video board or a processing unit 17, the latter possibly consisting of a personal computer or other data-processing unit.
  • the transmission of data from the telecameras 14 to the support 16 and, from this to the unit 17, could be made via cable 18 or in wireless fashion (infrared, optical, radiofrequency or other interface) , and, moreover, also the telecamera 14, the board 16 and the processing unit 17 could be integrated in a same device to meet any application requirements.
  • the telecamera 14 being provided with suitable optics, carries out one or more shots of images of warp threads (designated by 19 in the figure) controlled by the electronic board 16 and relating, preferably, to a region Ll close and upstream of reed 11, or at a region L2 close and downstream of the reed.
  • the acquired image is fed to the processing unit 17 to be converted into a code 24, preferably in the form of a bar code and compared with one or more preset sample codes corresponding to the intended configuration of warp threads.
  • the sample codes corresponding to the different and proper configurations of the warp are memorized (e.g., in form of bar codes) after an initial procedure of approval of the fabric in the course of formation, which is operated at the beginning of the work by sampling and memorizing within the board 16 all the jackings relative to the interweaving pattern (four in the case of the interweaving pattern of Fig. 6) , each of which will produce a different code 24.
  • the reading of warp threads in the course of jacking may take place by using a solid state light flash
  • the apparatus may be provided with two indicators of final and initial reading 20, 21 disposed at the edges of the fabric, for example on the upper bar 22 of the reed 11.
  • a millimeter scale may also be provided on the bar 22 to facilitate the direct identification of the defect detected by the system on the formed roll.
  • a complete analysis of the internal and external warp thread edges, and of the yarn pattern as well, can be performed on every image code, by looking for possible local dissimilarity.
  • the processing of the image - possibly based on tolerance thresholds pre- settable for any type of defect - allows a coding of the detected defects, and it is preferably carried out in the course of a monitoring synchronized with the jackings and repeated over and over again along the reading region, in order to locate the position of the defect and track down every single defect in the fabric under formation. Shown in Figs.
  • FIG. 4a is a first example (Fig. 4a) in which the image acquired by the telecamera 14 allows determining the proper code 24, that is, a code corresponding to a condition of absence of defects, and a second example (Fig. 5a) in which the image being read allows determining an "erroneous" code 24' corresponding to the defect "failure" of a warp thread 2' .
  • the processing unit 17 in response to the determination of the code 24', the processing unit 17 can be programmed for stopping the operation cycle and causing the shutdown of the loom, for example.
  • the detection of dissimilarity with respect to preset samples can also be carried out, upon every jacking, for any interweaving pattern, or periodically, after a preset number of jackings. It is also possible to provide a display for (continually or periodically) reading from the outside the images, and/or for emitting alarm signals corresponding to one or more detected defects.
  • the apparatus in case of dissimilarity with respect to the sample, the apparatus will be linked with the server that will "decide" a possible intervention based on preset tolerances and criteria, by defining the coordinates for the fabric under formation and the point on the millimeter bas 22, in order to intervene with the darning.
  • Fig. 7 shows a preferred solution of the apparatus according to the invention.
  • the bar 25 bring all the threads to the same level in the reading region of the telecamera and overcome, therefore, the above described drawback. It can be seen, therefore, from the foregoing, that the advantages obtained with the invention are, in particular, the suppression or reduction of the traditional warp-stops required in a loom, the ease and rapidity of installation thereof on any loom, the continuous and real-time control of the fabric-forming process, the absence or limitation of elements (the wire drops of traditional warp stops) in direct contact with the warp threads and the possibility of making a complete map of the defects on the formed fabric roll.
  • the invention thus conceived may also be subjected to several modifications and variants all falling within the inventive scope; moreover, all the parts can be replaced by technically equivalent elements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Warping, Beaming, Or Leasing (AREA)

Abstract

L'invention concerne un appareil et un procédé de lecture et de commande de fils de chaîne dans un métier à tisser comprenant l'utilisation d'un dispositif (14, 16) conçu pour lire et acquérir des images et comparer les images acquises et au moins un échantillon prédéterminé, afin de déterminer au moins un état de défaut dans le cycle de travail, en fonction du résultat de ladite comparaison en vue d'interrompre instantanément le fonctionnement du métier à tisser en réponse au défaut déterminé.
EP06755868A 2005-04-29 2006-04-24 Appareil et procede de lecture en ligne et commande de fils de chaine dans un metier a tisser Withdrawn EP1880049A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000080A ITFI20050080A1 (it) 2005-04-29 2005-04-29 Dispositivo e metodo di lettura e controllo in linea dei fili d'ordito in un telaio
PCT/IB2006/001211 WO2006117673A1 (fr) 2005-04-29 2006-04-24 Appareil et procede de lecture en ligne et commande de fils de chaine dans un metier a tisser

Publications (1)

Publication Number Publication Date
EP1880049A1 true EP1880049A1 (fr) 2008-01-23

Family

ID=36922069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06755868A Withdrawn EP1880049A1 (fr) 2005-04-29 2006-04-24 Appareil et procede de lecture en ligne et commande de fils de chaine dans un metier a tisser

Country Status (7)

Country Link
EP (1) EP1880049A1 (fr)
JP (1) JP2008539338A (fr)
KR (1) KR20080011309A (fr)
CN (1) CN101184878A (fr)
IL (1) IL186848A0 (fr)
IT (1) ITFI20050080A1 (fr)
WO (1) WO2006117673A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5217992B2 (ja) 2008-12-10 2013-06-19 株式会社豊田自動織機 織機における経糸切断検出装置
CN102704078A (zh) * 2012-07-06 2012-10-03 常熟市石油固井工具有限公司 带摄像功能的纺织机
CN103074717B (zh) * 2012-12-12 2016-04-20 江南大学 一种非接触式氨纶整经断头检测方法
EP2832908B1 (fr) * 2013-07-30 2023-01-04 Stäubli Sargans AG Dispositif de surveillance pour un métier à tisser, métier à tisser et procédé de surveillance
CN104532452A (zh) * 2014-12-10 2015-04-22 东华大学 一种基于图像技术的圆织机断纬和完纬的检测装置及方法
KR101695135B1 (ko) 2016-07-06 2017-01-10 김일열 제직기에서의 경사 결점 검출 장치
CN107850551A (zh) * 2016-07-06 2018-03-27 金烈 疵点检测装置
CN106048865B (zh) * 2016-08-03 2017-12-19 江苏宋和宋智能科技有限公司 一种织造经纬视觉监控智能***
RU182016U1 (ru) * 2018-02-26 2018-07-31 Общество с ограниченной ответственностью "Ниагара" Зевообразовательный механизм для формирования трехосной ткани
KR20190116873A (ko) 2018-04-05 2019-10-15 김일열 실의 스마트 결점 검출장치
US12000070B2 (en) * 2018-08-28 2024-06-04 Uster Technologies Ltd. Method and system for line-by-line one dimensional fabric inspection
CN111069077B (zh) * 2019-12-19 2022-05-03 界首市华宇纺织有限公司 一种防护效果优异的抗菌纱生产用成品收集设备
JP7339910B2 (ja) * 2020-03-23 2023-09-06 日本毛織株式会社 織物の製造方法、経糸の検査方法及び経糸の検査装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03161555A (ja) * 1989-11-20 1991-07-11 Toyota Autom Loom Works Ltd 織機における経糸通し検出装置
TW210363B (fr) * 1992-01-24 1993-08-01 Tsudakoma Ind Co Ltd
DE4422640A1 (de) * 1993-06-28 1995-01-05 Eidgenoess Tech Hochschule Verfahren und Vorrichtung zur Ortung eines gebrochenen Kettfadens in einer Webmaschine
JPH08209501A (ja) * 1995-01-26 1996-08-13 Toyota Autom Loom Works Ltd 織機における経糸検査装置
JP3343707B2 (ja) * 1995-04-28 2002-11-11 津田駒工業株式会社 たて糸の筬引通し位置チェック方法
IT1315177B1 (it) * 2000-01-24 2003-02-03 Rinaldo Sperotto Dispositivo guardiaordito per macchine da tessere,orditoi e macchineper maglieria.
WO2004072342A1 (fr) * 2003-02-17 2004-08-26 F.I.R.S.T. S.P.A. Systeme optique pour verifier la non-rupture des fils de chaines dans un metier a tisser

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006117673A1 *

Also Published As

Publication number Publication date
CN101184878A (zh) 2008-05-21
WO2006117673A1 (fr) 2006-11-09
IL186848A0 (en) 2008-02-09
KR20080011309A (ko) 2008-02-01
ITFI20050080A1 (it) 2006-10-30
JP2008539338A (ja) 2008-11-13

Similar Documents

Publication Publication Date Title
WO2006117673A1 (fr) Appareil et procede de lecture en ligne et commande de fils de chaine dans un metier a tisser
TW201510304A (zh) 織布機之監控裝置及監控方法
US9499926B2 (en) On-loom fabric inspection system and method
EP3717685B1 (fr) Procédés et systèmes d'inspection déclenchée de tissu sur métier
US20220341069A1 (en) Methods and systems for multiple image collection in an on-loom fabric inspection system
US12000070B2 (en) Method and system for line-by-line one dimensional fabric inspection
JPH03161555A (ja) 織機における経糸通し検出装置
CN1742124A (zh) 控制织机中经纱的未断裂状况的光学***
JPS6411735B2 (fr)
JPH08209501A (ja) 織機における経糸検査装置
DE102019109426A1 (de) Verfahren und Vorrichtung zum Ermitteln eines Betriebszustandes einer maschenbildenden Maschine
CN113445201B (zh) 基于相机阵列的双针床经编机断丝在线检测***及其方法
CN111719233B (zh) 经编机
JP2784152B2 (ja) 織機の機械的稼動状態監視装置
Kothari Process control in weaving
US20220170188A1 (en) Control of the positioning and continuity of threads in a loom
Catarino et al. A Pattern Recognition System Based on Cluster and Discriminant Analysis for Fault Identification during Production
FR3140383A1 (fr) Dispositif de surveillance du tissage au moyen de capteurs de déformation
JPH04148853A (ja) 検反装置
JPH08302535A (ja) たて糸の筬引通し位置チェック方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20071120

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20090615

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20110315