EP0309013A1 - Procédé pour retirer un fil de trame fautif de la foule sur un métier à tisser et métier à tisser utilisant ce procédé - Google Patents

Procédé pour retirer un fil de trame fautif de la foule sur un métier à tisser et métier à tisser utilisant ce procédé Download PDF

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Publication number
EP0309013A1
EP0309013A1 EP88201639A EP88201639A EP0309013A1 EP 0309013 A1 EP0309013 A1 EP 0309013A1 EP 88201639 A EP88201639 A EP 88201639A EP 88201639 A EP88201639 A EP 88201639A EP 0309013 A1 EP0309013 A1 EP 0309013A1
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EP
European Patent Office
Prior art keywords
thread
weft
shed
characteristic
weaving machine
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
EP88201639A
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German (de)
English (en)
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EP0309013B1 (fr
Inventor
Dirk Lewyllie
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.)
Picanol NV
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Picanol NV
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Filing date
Publication date
Application filed by Picanol NV filed Critical Picanol NV
Publication of EP0309013A1 publication Critical patent/EP0309013A1/fr
Application granted granted Critical
Publication of EP0309013B1 publication Critical patent/EP0309013B1/fr
Expired legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
    • D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping
    • D03D51/085—Extraction of defective weft

Definitions

  • This invention concerns a method for removing a faulty weft thread from the shed on a weaving machine, and also a weaving machine which uses this method.
  • the invention concerns a method for separating weft threads which are tangled in the warp threads and removing them from the shed.
  • This method has the disadvantage that it is not suitable for separating faulty weft sections which for some reason or other have become caught up at the fell line, for example by becoming entangled in the warp threads. This is because by introducing a new length of weft thread only a very small tractive force can be exerted on the faulty weft section, and this force is insufficient to remove a weft thread which has become entangled in the warp threads. Furthermore, in most cases formation of a loop results in the tangled thread becoming even more firmly entangled.
  • the present invention has as its object a method and a weaving machine which uses this method, which provides a systematic solution to said disadvantage.
  • the method according to the invention for removing a faulty weft thread from the shed on a weaving machine in which an attempt is made to separate the faulty weft section from the fell line by inserting a new weft thread in the form of a loop and then removing it from the shed at the receiving side of the shed, consists essentially of detecting whether the weft section has indeed been removed, and, if this does not appear to be the case, successively removing the newly inserted weft thread, from the picking or inserting side of the shed, drawing free the faulty, tangled weft section from the picking side of the shed, and so removing this section from the shed.
  • Fig. 1 shows a weft insertion mechanism of a weaving machine according to the present invention.
  • the conventional elements and components to be found in such a weft insertion mechanism are, as is commonly known, a yarn package 1, the weft thread 2 drawn from the yarn package, a weft accumulator mechanism such as e.g. a prewinder 3, insertion devices such as e.g. a main nozzle 4 and relay nozzles 5, the woven cloth 6, the warp threads 7, the cloth fell or fell line 8, the reed 9, the weft detector 10, the shed 11 and a cutting device 12 which operates on the weft thread 2 at the picking side 13 of the shed 11.
  • a weft accumulator mechanism such as e.g. a prewinder 3
  • insertion devices such as e.g. a main nozzle 4 and relay nozzles 5
  • the woven cloth 6 the warp threads 7, the cloth fell or fell line 8
  • the reed 9 the weft detector 10
  • a thread reversing device 14 which is mounted at the picking side 13 of the shed 11 and which can be presented to the weft thread 2.
  • This thread reversing device 14 consists of a winder which has a number of pins or fingers 15, for instance around the circumference of a circle, so that when it is turned the thread is wound up.
  • Another important characteristic of the invention consists of a special detection device 17 which is mounted at the receiving side 16 of the shed 11, and which, as is explained in greater detail below, can differentiate between a section of thread coming directly from the main nozzle 4 and a thread section coming from the direction of the fell line 8.
  • this detection device 17 consists preferrably of a nozzle (18), for example a suction nozzle in the form of a flattened pipe, with a thread detector 20 on the side 19 nearest the cloth fell 8, while mounted centrally in the nozzle 18 there should preferrably be a blower nozzle 21.
  • a nozzle for example a suction nozzle in the form of a flattened pipe, with a thread detector 20 on the side 19 nearest the cloth fell 8, while mounted centrally in the nozzle 18 there should preferrably be a blower nozzle 21.
  • Detector 20 serves to detect a thread 2 coming from the cloth fell 8
  • detector 22 serves to detect a thread coming from the main nozzle 4.
  • the suction nozzle can be dispensed with and only a pipe with a blower nozzle 23 used.
  • the detectors 20 and 22 may or may not each be formed by two components mounted diametrically opposite each other (as shown for detector 22), where these two-component detectors can be mounted horizontally and vertically in any plane.
  • the first faulty weft section 24 can, as described in Dutch patent application No. 86.02 191 made by the present applicant and as shown in fig. 2, be separated from the cloth fell 8 and removed from the shed in the form of a loop 27 by inserting a new length of weft thread 2 into the shed.
  • the thread detector 20 will not detect a thread any more, as shown in fig. 3. At that moment the cutting device 12 can operate so that the weft section 2, present in the shed 11 and extending into the nozzle 18 and beyond, is cut and removed. In this case detector 20 checks whether the weft thread section 24 has in fact been removed. The weaving machine can then be restarted.
  • FIG. 4 to 6 show a method for removing the above-mentioned faulty weft section 24 from the shed if for any reason it should be come caught or tangled in the shed 11 at a particular point 30, for instance between the warp threads 7.
  • a new weft thread inserted in the form of a loop 27 cannot exert sufficient tractive force to pull the faulty weft section 24 free.
  • thread detector 20 still detects a thread, thus indicating that the weft section concerned 24 has not come free.
  • the thread reversing device 14 is activated.
  • the weft thread 2 is cut, in this case behind the main nozzle 4, and then the extracted, wound-up length of thread 31 is evacuated.
  • Fig. 7 shows a variant of the thread reversing device, which in this case consists of a reversing nozzle 32 mounted before the main nozzle 4, by means of which the faulty weft section 24 can be removed.
  • the reversing nozzle 32 can also be used in combination with the above-mentioned reversing winder 14, in which case the reversing nozzle 32 ensures that the faulty weft section 24 is partly extracted, so forming a certain reserve 33, after which the reversing winder 14 operates and winds a few turns. Since there is a thread reserve 33, in this case no turns have to taken from the prewinder while the reversing winder 14 is operating, and clip 34 can be closed. After the reversing winder 14 has made a few turns, the weft thread 2 can be cut by the cutting device 12 and the rest of the faulty weft section 24 can be wound up and drawn free.
  • the thread reversing device 14 or 32 can be deactivated whenever the tension rises above a set threshold. This offers the advantage that the tractive force exerted on the weft thread is set according to the breaking strength of the thread 2, thus making it unlikely that the faulty weft section 24 will break. If the thread still does not come free at the maximum set tension, a signal can be given so that the weaver can intervene manually.
  • control unit 36 interprets the signals from the detectors 20, 22 and 35 and controls the operation of all the above-mentioned mechanisms.
  • the information from these detectors can for example be stored in a memory and/or passed on directly to the control unit.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19880201639 1987-08-26 1988-07-29 Procédé pour retirer un fil de trame fautif de la foule sur un métier à tisser et métier à tisser utilisant ce procédé Expired EP0309013B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8700945 1987-08-26
BE8700945A BE1000883A3 (nl) 1987-08-26 1987-08-26 Werkwijze voor het verwijderen van een foutieve inslagdraad uit de gaap van een weefmachine en weefmachine die deze werkwijze toepast

Publications (2)

Publication Number Publication Date
EP0309013A1 true EP0309013A1 (fr) 1989-03-29
EP0309013B1 EP0309013B1 (fr) 1991-08-21

Family

ID=3882825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880201639 Expired EP0309013B1 (fr) 1987-08-26 1988-07-29 Procédé pour retirer un fil de trame fautif de la foule sur un métier à tisser et métier à tisser utilisant ce procédé

Country Status (3)

Country Link
EP (1) EP0309013B1 (fr)
BE (1) BE1000883A3 (fr)
DE (1) DE3864364D1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2642769A1 (fr) * 1989-02-07 1990-08-10 Saurer Diederichs Sa Dispositif pour la detection de defauts du fil de trame dans une machine a tisser
US5005609A (en) * 1988-05-25 1991-04-09 S.A. Saurer Diederichs Pneumatic removal of defective weft filament
EP0492461A1 (fr) * 1990-12-28 1992-07-01 TSUDAKOMA Corp. Méthode pour éloigner un fil de trame cassé
BE1004529A3 (fr) * 1989-08-25 1992-12-08 Toyoda Automatic Loom Works Appareil de traitement de trame destine a un metier a injection.
EP0534541A1 (fr) * 1991-09-18 1993-03-31 SOMET SOCIETA' MECCANICA TESSILE S.p.A. Procédé pour retirer automatiquement un fil de trame cassé de la foule sur un métier à tisser à jet d'air et dispositif pneumomécanique utilisé dans ce procédé
EP0562230A1 (fr) * 1992-03-25 1993-09-29 Lindauer Dornier Gesellschaft M.B.H Procédé et dispositif pour la fabrication d'un tissu, particulièrement un tissu sans noeuds, sur un métier à jet d'air
EP0575990A1 (fr) * 1992-06-26 1993-12-29 Tsudakoma Kogyo Kabushiki Kaisha Méthode pour éloigner un fil de trame cassé
EP0584738A1 (fr) * 1992-08-21 1994-03-02 Tsudakoma Kogyo Kabushiki Kaisha Dispositif pour l'extraction d'un fil de trame défectueux sur un métier à tisser
DE19521100C1 (de) * 1995-06-09 1996-07-11 Dornier Gmbh Lindauer Kontrollierte Absaugung an Webmaschinen
DE19521106A1 (de) * 1995-06-09 1996-12-12 Dornier Gmbh Lindauer Verfahren zur Schußstoppbehebung
KR100266959B1 (ko) * 1997-03-24 2000-09-15 데라다 도키오 미스사처리방법
EP1508633A1 (fr) 2003-08-15 2005-02-23 Sultex AG Métier à tisser à jet
DE102016208186A1 (de) 2016-05-12 2017-11-16 Rwth Aachen Bildbasierte Webfachüberwachung zur Unterstützung der automatisierten Behebung von Schusseintragsfehlern in Luftdüsenwebmaschinen
EP4317558A1 (fr) 2022-08-04 2024-02-07 ITEMA S.p.A. Dispositif pour l'élimination automatique de faux fils de trame pour métiers à tisser à jet d'air et procédé associé

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2248353A1 (fr) * 1973-10-20 1975-05-16 Dornier Gmbh Lindauer
FR2537168A1 (fr) * 1982-12-01 1984-06-08 Rueti Te Strake Bv Metier a tisser sans navette comprenant un moyen pour retirer, de la foule, des fils defectueux de trame
US4664157A (en) * 1985-01-09 1987-05-12 Tsukakoma Corp. Incomplete weft removing device for shuttleless loom

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2248353A1 (fr) * 1973-10-20 1975-05-16 Dornier Gmbh Lindauer
FR2537168A1 (fr) * 1982-12-01 1984-06-08 Rueti Te Strake Bv Metier a tisser sans navette comprenant un moyen pour retirer, de la foule, des fils defectueux de trame
US4664157A (en) * 1985-01-09 1987-05-12 Tsukakoma Corp. Incomplete weft removing device for shuttleless loom

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5005609A (en) * 1988-05-25 1991-04-09 S.A. Saurer Diederichs Pneumatic removal of defective weft filament
FR2642769A1 (fr) * 1989-02-07 1990-08-10 Saurer Diederichs Sa Dispositif pour la detection de defauts du fil de trame dans une machine a tisser
EP0382662A1 (fr) * 1989-02-07 1990-08-16 S.A. Saurer Diederichs Dispositif pour la détection de défauts du fil de trame dans une machine à tisser
BE1004529A3 (fr) * 1989-08-25 1992-12-08 Toyoda Automatic Loom Works Appareil de traitement de trame destine a un metier a injection.
EP0492461A1 (fr) * 1990-12-28 1992-07-01 TSUDAKOMA Corp. Méthode pour éloigner un fil de trame cassé
EP0534541A1 (fr) * 1991-09-18 1993-03-31 SOMET SOCIETA' MECCANICA TESSILE S.p.A. Procédé pour retirer automatiquement un fil de trame cassé de la foule sur un métier à tisser à jet d'air et dispositif pneumomécanique utilisé dans ce procédé
EP0562230A1 (fr) * 1992-03-25 1993-09-29 Lindauer Dornier Gesellschaft M.B.H Procédé et dispositif pour la fabrication d'un tissu, particulièrement un tissu sans noeuds, sur un métier à jet d'air
EP0575990A1 (fr) * 1992-06-26 1993-12-29 Tsudakoma Kogyo Kabushiki Kaisha Méthode pour éloigner un fil de trame cassé
EP0584738A1 (fr) * 1992-08-21 1994-03-02 Tsudakoma Kogyo Kabushiki Kaisha Dispositif pour l'extraction d'un fil de trame défectueux sur un métier à tisser
US5345975A (en) * 1992-08-21 1994-09-13 Tsudakoma Kogyo Kabushiki Kaisha Multiple weft removing devices for a loom
DE19521100C1 (de) * 1995-06-09 1996-07-11 Dornier Gmbh Lindauer Kontrollierte Absaugung an Webmaschinen
EP0747520A2 (fr) 1995-06-09 1996-12-11 Lindauer Dornier Gesellschaft M.B.H Procédé et dispositif pour le tirage pneumatique commandé de fils de trame pour la réparation de fil de trame cassé sur métiers à jet d'air
DE19521106A1 (de) * 1995-06-09 1996-12-12 Dornier Gmbh Lindauer Verfahren zur Schußstoppbehebung
US5642759A (en) * 1995-06-09 1997-07-01 Lindauer Dornier Gesellschaft Mbh Method for avoiding weaving a faulty weft thread during repair of weft thread fault
EP0747520A3 (fr) * 1995-06-09 1997-09-24 Dornier Gmbh Lindauer Procédé et dispositif pour le tirage pneumatique commandé de fils de trame pour la réparation de fil de trame cassé sur métiers à jet d'air
EP0747519A3 (fr) * 1995-06-09 1997-09-24 Dornier Gmbh Lindauer Procédé pour éviter l'entretissage d'un fil de trame cassé dans un tissu
US5746256A (en) * 1995-06-09 1998-05-05 Lindauer Dornier Gesellschaft Mbh Method and apparatus for a controlled pneumatic removal of a faulty weft thread in an air jet loom
KR100266959B1 (ko) * 1997-03-24 2000-09-15 데라다 도키오 미스사처리방법
EP1508633A1 (fr) 2003-08-15 2005-02-23 Sultex AG Métier à tisser à jet
EP1508633B1 (fr) * 2003-08-15 2008-10-29 Sultex AG Métier à tisser à jet
DE102016208186A1 (de) 2016-05-12 2017-11-16 Rwth Aachen Bildbasierte Webfachüberwachung zur Unterstützung der automatisierten Behebung von Schusseintragsfehlern in Luftdüsenwebmaschinen
WO2017194730A1 (fr) 2016-05-12 2017-11-16 Rwth Aachen Dispositif et procédé de contrôle de foule sur la base d'images
EP4317558A1 (fr) 2022-08-04 2024-02-07 ITEMA S.p.A. Dispositif pour l'élimination automatique de faux fils de trame pour métiers à tisser à jet d'air et procédé associé

Also Published As

Publication number Publication date
BE1000883A3 (nl) 1989-05-02
DE3864364D1 (de) 1991-09-26
EP0309013B1 (fr) 1991-08-21

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