EP0309013B1 - 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 PDFInfo
- Publication number
- EP0309013B1 EP0309013B1 EP19880201639 EP88201639A EP0309013B1 EP 0309013 B1 EP0309013 B1 EP 0309013B1 EP 19880201639 EP19880201639 EP 19880201639 EP 88201639 A EP88201639 A EP 88201639A EP 0309013 B1 EP0309013 B1 EP 0309013B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thread
- weft
- shed
- weaving machine
- section
- 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
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Classifications
-
- 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
- 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 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.
- 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.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Claims (15)
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 EP0309013A1 (fr) | 1989-03-29 |
EP0309013B1 true 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 (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2631980B1 (fr) * | 1988-05-25 | 1990-08-24 | Saurer Diederichs Sa | Dispositif pour l'extraction d'un fil de trame defectueux, sur une machine a tisser |
FR2642769B1 (fr) * | 1989-02-07 | 1991-10-25 | Saurer Diederichs Sa | Dispositif pour la detection de defauts du fil de trame dans une machine a tisser |
KR920009248B1 (ko) * | 1989-08-25 | 1992-10-15 | 가부시기가이샤 도요다지도우 쇽기세이사꾸쇼 | 젯트 직기에 있어서의 위사 처리 장치 |
JP2930739B2 (ja) * | 1990-12-28 | 1999-08-03 | 津田駒工業株式会社 | 不良糸除去方法 |
IT1251495B (it) * | 1991-09-18 | 1995-05-15 | Somet Soc Mec Tessile | Metodo per l'estrazione automatica dal passo di un filo di trama rotto in telai di tessitura ad aria e dispositivo pneumomeccanico di avvolgimento utilizzato in detto metodo |
DE4209686C2 (de) * | 1992-03-25 | 1995-02-02 | Dornier Gmbh Lindauer | Verfahren und Vorrichtung zur Herstellung von insbesondere knotenfreien Gewebe auf Luftdüsenwebmaschinen |
US5351721A (en) * | 1992-06-26 | 1994-10-04 | Tsudakoma Kogyo Kabushiki Kaisha | Mispicked weft removing method |
JP3339884B2 (ja) * | 1992-08-21 | 2002-10-28 | 津田駒工業株式会社 | 織機の不良緯糸除去装置 |
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 |
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 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH578070A5 (fr) * | 1973-10-20 | 1976-07-30 | Dornier Gmbh Lindauer | |
NL8204665A (nl) * | 1982-12-01 | 1984-07-02 | Rueti Te Strake Bv | Spoelloze weefmachine, voorzien van middelen voor het uit het weefvak verwijderen van defecte inslagdraden. |
KR890000569Y1 (ko) * | 1985-01-09 | 1989-03-11 | 쯔다고마 고오교오 가부시끼 가이샤 | 셔틀리스 (Shuttleless) 직기의 불량사 제거장치 |
-
1987
- 1987-08-26 BE BE8700945A patent/BE1000883A3/nl not_active IP Right Cessation
-
1988
- 1988-07-29 DE DE8888201639T patent/DE3864364D1/de not_active Expired - Lifetime
- 1988-07-29 EP EP19880201639 patent/EP0309013B1/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
EP0309013A1 (fr) | 1989-03-29 |
DE3864364D1 (de) | 1991-09-26 |
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