EP0322576A1 - Méthode pour dégager et réparer des fils de trame mal insérés dans la trame de métiers à tuyère - Google Patents

Méthode pour dégager et réparer des fils de trame mal insérés dans la trame de métiers à tuyère Download PDF

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Publication number
EP0322576A1
EP0322576A1 EP88119879A EP88119879A EP0322576A1 EP 0322576 A1 EP0322576 A1 EP 0322576A1 EP 88119879 A EP88119879 A EP 88119879A EP 88119879 A EP88119879 A EP 88119879A EP 0322576 A1 EP0322576 A1 EP 0322576A1
Authority
EP
European Patent Office
Prior art keywords
weft
length
shed
mispicked
releasing
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Withdrawn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
EP88119879A
Other languages
German (de)
English (en)
Inventor
Jan Dipl.-Ing. Pajgrt
Vincenc Dipl.-Ing. Smeták
Jaroslav Dipl.-Ing. Kalina
Jiri Vystrcil
Michal Dipl.-Ing. Zemek
Milan Dipl.-Ing. Pus
Pavel Dipl.-Ing. Bucek
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.)
ZVS VYZKUMNEVYVOJOVY USTAV KONCERNOVA UCELOVA ORGANIZACE
Original Assignee
ZVS VYZKUMNEVYVOJOVY USTAV KONCERNOVA UCELOVA ORGANIZACE
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 ZVS VYZKUMNEVYVOJOVY USTAV KONCERNOVA UCELOVA ORGANIZACE filed Critical ZVS VYZKUMNEVYVOJOVY USTAV KONCERNOVA UCELOVA ORGANIZACE
Publication of EP0322576A1 publication Critical patent/EP0322576A1/fr
Withdrawn legal-status Critical Current

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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

  • the present invention relates to a method of releasing the mending wefts mispicked into the shed in jet weaving machines.
  • a method of releasing and simultaneous removing of mis­picked wefts from the shed formed of warp threads is known.
  • a clamp is slipped out to its free end by complex motion, per­formed by a pair of piston rods of pneumatic cylinders.
  • the free weft end is gripped by the clamp whereupon, from the box fixed in front of the shed on the carrier of the shaped reed, a flexible belt is slipped out.
  • a paddle with bent sides is moun­ted which is inserted into the shed below the clamp. On one side, the paddle is guided by the carrier and by its other bent side is gripped the weft held by the clamp.
  • the mispicked weft gripped by the other side of the paddle is mechanically released fromt he interlacing point.
  • the paddle is returned to the box by winding back the flexible belt.
  • the clamp moves the gripped end of the released mispicked weft by swinging motion to the sucking nozzle which removes it from the shed by sucking-off.
  • it is possible to restart the weaving cycle on the weaving machine.
  • the main subject matter of the method according to the present invention consists in that the weft is released from the free part of its length in the shed in the form of an advancing wave by action of a pressure fluid flow.
  • the advantage of the method according to the present invention consists in that the tensile component of the force exerted on the weft at the point of the wave is caused by the high-speed field of the pressure fluid.
  • a further substantial advantage of the present method consists in that upon releasing the mispicked weft, the same is also mended, thus making possible to omit the whole procedure of removing the weft by a following insertion of a new length.
  • pick stop motion 4 Upon detec­ting a mispick of weft 1 towards the end of shed 2, pick stop motion 4 emits a signal to a not represented control mechanism which stops measuring the length of weft 1, and simultaneously prevents the inlet of pressure fluid into the inserting nozzle 5. At the same time, a signal is emitted for blockage of cutter 6, in order to prevent the separation of weft 1 at the inlet side of shed 2.
  • a loop 12 is formed on the free part 7 of weft 1 by releasing a part of the follow­ing length 10 of weft 1.
  • This part of the method can be already performed during stoppage of the weaving process, thus eliminating the necessity of supplementary compen­sation of tension on the free part 7 of the uncut weft 1.
  • the weaving machine Upon reversion to shed 2 with the mispicked length 9 of weft 1, the weaving machine is stopped in a position in which the insertion of weft 1 is started in a normal weaving process. This is advantageous for that reason that in this still first quadrant of the weaving machine revolution, the motion of warp threads 3 advances the motion from the interlacing point 13 moving reed 8 with the weft inserting channel.
  • the pressure fluid flow discharged from the supplemen­tary blowing nozzles 14 thus must overcome the retai­ning frictional force of the mispicked length 9 of weft 1 in the wedge of shed 2 formed of warp threads 3.
  • the intensity of that retaining force changes about the length of shed 2 because of the unequal tension of separate warp threads 3 and the unevenness of their fibres.
  • the length of wave 15 cannot be exces­sively increased as in that case a situation is brought about in which the connecting part 17 of weft 1 in wave 15, between its front 16 and the beaten-up mispicked length 9 is considerably acted upon by the preceding supplementary blowing nozzles 14.
  • the moving wave 15 passes then, about weft 1, the whole length of shed 2, the whole mispicked length 9 of weft 1 thus being released from the interlacing point 13 of the manufactured fabric 18. Simultaneously, the mending of the mispicked length 9 of weft 1 is performed as, by throughpassing of wave 15, weft 1 is stretched and straightened in shed 2. If, during weaving, a breakage of weft 1 in shed 2 happened, and a part of its length was blown off, said length being longer than the length added by the releasing wave 15, the pick stop motion 4 does not track the presence of weft 1 upon through­passing of wave 15.
  • weft 1 is released from the measured following length 10 of weft 1 until the front 16 of weft 1 which is moved through shed 2 by the weft inserting fluid flow, arrives at the pick stop motion 4 which thereupon emits a signal by which the releasing from the following length 10 of weft 1 and the supply of the weft inserting pressure fluid flow is stopped.
  • the mispicked length 10 is completely mended and the weaving cycle can be imme­diately carried on.
  • the mispicked, already released length 9 of weft 1 is removed from shed by withdrawing, e.g. by means of a known winding device, either towards the inserting, or the pick side of shed 2.
  • withdrawing e.g. by means of a known winding device
  • the released, mispicked length 9 of weft 1 is removed by drawing out to the pick side of shed 2
  • a whole new following length 10 of weft 1 is simultaneously inserted into shed 2 and upon star­ting the normal weaving cycle, this length is already beaten up into the interlacing point 13 during the first revolution of the weaving machine.
  • the weft 1 When weaving material tending to form starting streaks in the fabric 18, the weft 1 is cut-off upon releasing the mispicked length 9 by wave 15 and removed from the shed, e.g. in the manner already specified above. Upon removal of this mispicked length 9 of weft 1 the normal weaving procedure is restarted by insertion of the following length 10 of weft 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP88119879A 1987-12-29 1988-11-29 Méthode pour dégager et réparer des fils de trame mal insérés dans la trame de métiers à tuyère Withdrawn EP0322576A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CS10033/87 1987-12-29
CS1003387A CS274515B1 (en) 1987-12-29 1987-12-29 Method of loosening and repairing weft defectively inserted into shed on jet loom

Publications (1)

Publication Number Publication Date
EP0322576A1 true EP0322576A1 (fr) 1989-07-05

Family

ID=5447678

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88119879A Withdrawn EP0322576A1 (fr) 1987-12-29 1988-11-29 Méthode pour dégager et réparer des fils de trame mal insérés dans la trame de métiers à tuyère

Country Status (3)

Country Link
EP (1) EP0322576A1 (fr)
JP (1) JPH01266240A (fr)
CS (1) CS274515B1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5322090A (en) * 1992-03-16 1994-06-21 Lindauer Dornier Gesellschaft Mbh Method and apparatus for readying a defined weft thread reserve when there is a loom stoppage
EP0747519A2 (fr) * 1995-06-09 1996-12-11 Lindauer Dornier Gesellschaft M.B.H Procédé pour éviter l'entretissage d'un fil de trame cassé dans un tissu
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
EP0867544A1 (fr) * 1997-03-24 1998-09-30 Tsudakoma Kogyo Kabushiki Kaisha Méthode pour éloigner un fil de trame cassé
EP0959160A1 (fr) * 1998-05-18 1999-11-24 Tsudakoma Kogyo Kabushiki Kaisha Dispositif d'actionnement pour le dispositif de retenue d'une lisière à franges
EP0976859A1 (fr) * 1998-07-23 2000-02-02 Lindauer Dornier Gesellschaft M.B.H Procédé pour la réparation de fils de trame cassés dans les métiers à tisser, plus particulièrement les métiers à jet d'air

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2051445A1 (de) * 1969-10-22 1971-05-19 N V Machinefabriek L te Strake Deurne (Niederlande) Verfahren zum Transportieren eines Einschussfadens durch ein Webefach, sowie fahren
FR2140679A1 (fr) * 1971-06-10 1973-01-19 Te Strake Maschf
EP0207470A2 (fr) * 1985-06-29 1987-01-07 Nissan Motor Co., Ltd. Méthode et système pour enlever un fil de trame mal inséré

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2051445A1 (de) * 1969-10-22 1971-05-19 N V Machinefabriek L te Strake Deurne (Niederlande) Verfahren zum Transportieren eines Einschussfadens durch ein Webefach, sowie fahren
FR2140679A1 (fr) * 1971-06-10 1973-01-19 Te Strake Maschf
EP0207470A2 (fr) * 1985-06-29 1987-01-07 Nissan Motor Co., Ltd. Méthode et système pour enlever un fil de trame mal inséré

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5322090A (en) * 1992-03-16 1994-06-21 Lindauer Dornier Gesellschaft Mbh Method and apparatus for readying a defined weft thread reserve when there is a loom stoppage
EP0747519A2 (fr) * 1995-06-09 1996-12-11 Lindauer Dornier Gesellschaft M.B.H Procédé pour éviter l'entretissage d'un fil de trame cassé dans un tissu
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
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
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
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
EP0867544A1 (fr) * 1997-03-24 1998-09-30 Tsudakoma Kogyo Kabushiki Kaisha Méthode pour éloigner un fil de trame cassé
EP0959160A1 (fr) * 1998-05-18 1999-11-24 Tsudakoma Kogyo Kabushiki Kaisha Dispositif d'actionnement pour le dispositif de retenue d'une lisière à franges
US6109308A (en) * 1998-05-18 2000-08-29 Tsudakoma Kogyo Kabushiki Kaisha Fringed selvage retainer operating device
EP0976859A1 (fr) * 1998-07-23 2000-02-02 Lindauer Dornier Gesellschaft M.B.H Procédé pour la réparation de fils de trame cassés dans les métiers à tisser, plus particulièrement les métiers à jet d'air

Also Published As

Publication number Publication date
CS274515B1 (en) 1991-04-11
JPH01266240A (ja) 1989-10-24
CS1003387A1 (en) 1990-07-12

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