EP0363705A1 - Métier à tisser pneumatique avec un moyen pour retirer de la foule un fil de trame défectueux - Google Patents

Métier à tisser pneumatique avec un moyen pour retirer de la foule un fil de trame défectueux Download PDF

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Publication number
EP0363705A1
EP0363705A1 EP89117509A EP89117509A EP0363705A1 EP 0363705 A1 EP0363705 A1 EP 0363705A1 EP 89117509 A EP89117509 A EP 89117509A EP 89117509 A EP89117509 A EP 89117509A EP 0363705 A1 EP0363705 A1 EP 0363705A1
Authority
EP
European Patent Office
Prior art keywords
shed
air
weaving machine
roller
machine according
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Withdrawn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
EP89117509A
Other languages
German (de)
English (en)
Inventor
Adnan Dr.-Ing. Wahhoud
Rudolf Riezler
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.)
Lindauer Dornier GmbH
Original Assignee
Lindauer Dornier GmbH
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 Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of EP0363705A1 publication Critical patent/EP0363705A1/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Withdrawn legal-status Critical Current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 an air-jet weaving machine according to the preamble of patent claim 1.
  • Such a disturbance of the thread transport can be caused by a yarn defect in the weft yarn, e.g. a thick spot that prevents the weft from being carried through the air duct.
  • the drain electronics of the machine controlled by the thread monitor causes the machine to reopen the shed so that the faulty weft thread is now in the open shed.
  • blowing nozzles which are arranged outside, below and in front of the shed in order to blow against the thread in such a way that it is moved back into the open shed.
  • blow nozzles are disadvantageous for various reasons.
  • the present invention is therefore based on the object of developing a weaving machine with a device of the type mentioned in such a way that a reliable lifting of the weft thread from the wound goods takes place reliably with an open weaving loom even with tightly wound fabrics and practically with all types of fabric.
  • the invention is characterized in that the device can be brought into the vicinity of the fabric stop with a sliding drive, engages in the shed with finger-like gripper tips (bristles), frictionally attaches it to the distorted weft thread and puts it into the open shed transported in the direction perpendicular to its longitudinal axis.
  • the device consists of a series of brushes which are arranged in a rotationally fixed manner in parallel and at a mutual distance from one another on a rotationally driven shaft, the entire arrangement being arranged translationally on the weaving machine in the direction of the warp thread or in the opposite direction.
  • Such a translatory drive is necessary in order to move the device outside the working area of the weaving machine when not in use, and only when in use is it moved into the working area of the weaving machine, namely in the direction of the warp threads onto the now opened shed.
  • the evaluation electronics of the machine controlled by the weft monitor first control the scissors in such a way that this faulty weft is prevented from being cut.
  • the distorted weft thread must not be cut.
  • the device according to the invention only comes into operation after the scissors have been put out of operation.
  • the brushes are driven in rotation, it being important that the brushes with their bristles now protrude into the open shed, capture the weft thread attached to the goods and in the direction of the Transport the open center of the compartment.
  • the disturbed weft thread is thus moved in from the sheet pick-up point towards the center of the shed.
  • the disturbed weft thread is then pulled out of the air duct according to a preferred embodiment of the present invention, and as soon as the electronics associated with the suction nozzle have signaled the suction of the thread, the faulty weft thread is cut off in front of the main nozzle.
  • the machine is then put back into operation as intended.
  • a brush is provided which is displaceable in the direction perpendicular to the weft axis and is also driven parallel to the weft axis, on the outer circumference of which the hook tips are then arranged.
  • This brush does not have the length of the reed width, but is much shorter and is therefore moved along the shed over the entire reed width, ie in Direction of the weft axis.
  • the longitudinal axis of this brush does not necessarily have to be parallel to the weft axis. It can also be inclined at an angle to it. It is only important that the brush is considerably shorter than the reed width and that the brush is moved along the reed width in order to successively transport the faulty weft thread out of the open shed.
  • the length of the brush corresponds to the weaving width, so that a separate drive of the brush in the direction of the weft insertion direction, as was assumed in claim 2, is omitted.
  • the faulty weft thread is not removed from the shed, but a further weft thread entry over the entire weaving width of the weaving machine can be attempted with the faulty weft thread.
  • the relay nozzles are put into operation as intended, transport the faulty weft thread out of the air duct and a suction nozzle is arranged on the outlet side, which detects the faulty weft thread and pulls it out over a certain length, so that there is an undisturbed thickening and other errors in the shed exempt piece of thread lies.
  • the focus of the present invention should be on the device which transports the disturbed weft thread from the struck web into the open shed.
  • this device consists of a brush roller which extends over the entire width of the reed, again there being two possibilities.
  • the brush roller is continuously fed with brushes that are practically not spaced from one another, while in a second embodiment, a plurality of brushes arranged at a distance from one another are arranged in a rotationally fixed manner on the brush roller.
  • an element is provided which consists of several fingers, these fingers performing a kind of blade movement. This movement is directed into the shed in order to take hold of the tightly chipped, disturbed weft and separate it from the edge of the goods and transport it into the open shed.
  • an air line is provided in the middle of the brush roller and corresponding air holes are provided in the jacket of the brush roller, so that the discharge effect takes place both under the action of compressed air and mechanically under the action of the driven bristles.
  • the "scoop-like" discharge effect described above can also be combined with compressed air.
  • the air weaving machine consists of a sley 1, it being shown that the shed 2 is open.
  • the shed consists of warp threads 6 of the upper compartment and warp threads 7 of the lower compartment.
  • the profile reed 3 with the air duct 4 is arranged in the shed 2, the weft thread being transported in the air duct over a series of relay nozzles 5 arranged at a mutual distance from one another.
  • the fabric 8 is attached, position 9 being the fabric stop as the outermost position of the sley 1.
  • a disturbance in the entry can be caused by disturbances in the shape of the weft thread as well as other disturbances in the weft thread entry, especially by disturbances in the technical training, e.g. through warp threads hanging in the shed.
  • the air-jet weaving machine also consists of a spreader table 11 with a projection 12 arranged thereon, which points towards the air duct 4, and a breast beam 13 for the goods take-off.
  • a device 14 for removing a disturbed weft 10 from the shed 2 is now arranged on the weaving machine outside the work area.
  • the device 14 is arranged outside the tissue formation area and not as a hindrance to machine operation.
  • the device 14 is first in the rest position shown in Figure 1 and then brought in the direction of arrow 17 into its working position shown in Figure 2 via a drive, not shown.
  • the device consists of a hollow roller 15, in which a row of radially projecting bristles 16 is arranged.
  • the roller 15 does not extend over the entire reed width, but is additionally driven along this reed width (ie in the direction of the weft longitudinal axis). The faulty weft was then progressively picked up from the entry side to the catch side by the roller moving in this direction and transported into the open shed.
  • roller 15 thus moves perpendicular to the drawing plane in FIG. 1 parallel to the weft thread.
  • the longitudinal axis of the roller 15 need not be parallel to the weft axis; it can also form an angle therefrom in order to be able to grasp the disturbed weft better.
  • the roller 15 can either extend continuously over the entire reed width or a series of bristle bodies of the same or different lengths can be arranged on the specified hollow roller 15 at a mutual distance from one another.
  • the device 14 is moved in the direction of arrow 17 in the direction of the warp threads 6, 7 via a translatory drive (not shown in more detail) and then assumes the working position shown in FIG. 2.
  • the working position is characterized in that the bristles 16 of the device now reach into the shed 2.
  • the bristles 16 sit frictionally on the tissue so that the bristle elements, i.e. So sit on the bristle tips between the last struck, disturbed weft and the correctly struck weft that has already been bound by the warp threads.
  • the last bound weft thread can no longer be transported into the shed because it is already bound by the warp threads, while the disturbed weft thread 10 can still be transported very easily into the shed 2 in the direction of arrow 17.
  • the entire device 14 can be arranged not only above the shed 2, but also below, e.g. on the spreader table 11, where it is provided with a corresponding translatory drive in the direction of the arrow 17, or the roller can also be attached directly to the projection 12 of the spreader table 11, as a result of which the translatory drive in the direction of the arrow 17 is then omitted.
  • FIG. 3 shows, in a further development of the exemplary embodiment according to FIGS. 1 and 2, that the device 14 is driven in the direction of the arrow 18 and thus transports the faulty weft thread 10 into the shed 2 in the direction of the arrow 17.
  • FIG. 3a shows a second embodiment, consisting of a brush 31 with bristles 16 arranged vertically below it, which only move in the direction of arrow 32 and in the opposite direction, i.e. is only driven in translation, but not in rotation.
  • An oscillating movement that is to say a type of blade movement or the like, can also be superimposed in order to ensure the required discharge effect and the frictional engagement on the fabric edge.
  • the bristles 16 can in this case consist of plastic bristles, natural bristles or metal fingers, and if metal fingers are used, additional air channels can be provided in order to ensure air transport in addition to the required frictional contact.
  • nozzles can be arranged between the bristles, which thus still assign an air movement to the required frictional discharge movement.
  • Figures 4 and 5 show a device with which the disturbed weft thread is prevented from being cut off.
  • a pair of scissors 21 is arranged near the main nozzle in a manner known per se, which interacts with a centering device 19, the weft thread being cut in the region of a recess 20 in the centering device 19.
  • the scissors 21 here consist of two scissor jaws which can be moved relative to one another, the two jaws being mounted on the machine at the pivot point 22 and the power drive 24 oscillating in the direction of the arrow 23.
  • the suction bore 25 described is supplied with a vacuum in the region of the recess 20 via a valve 29 and a suction nozzle 27 via the line 28, so that the faulty weft thread is sucked off into the suction bore 25 in the direction of arrow 30.
  • the disturbed weft thread is brought outside the cutting area of the scissors 21 and held by the suction nozzle 27.
  • the scissors 21 are locked mechanically or electromechanically.
  • the further processing operations of the weft thread then take place, as mentioned in the general description, namely either the faulty weft thread is already removed from the air duct 4 near the main nozzle with a hook or with a suction nozzle, or it is transported over the entire air duct and drawn off at the outlet end using a suction nozzle.
  • FIG. 6 shows schematically, in section, a further embodiment through a hollow roller with bristles attached to it, the jacket of the hollow roller being interrupted by radially outwardly directed air channels 33 which further support the weft-lifting effect by their blowing action.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP89117509A 1988-10-11 1989-09-22 Métier à tisser pneumatique avec un moyen pour retirer de la foule un fil de trame défectueux Withdrawn EP0363705A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3834580 1988-10-11
DE3834580 1988-10-11
DE3843399 1988-12-23
DE19883843399 DE3843399A1 (de) 1988-10-11 1988-12-23 Luftwebmaschine mit einer vorrichtung zur entfernung eines fehlerhaften schussfadens aus dem webfach

Publications (1)

Publication Number Publication Date
EP0363705A1 true EP0363705A1 (fr) 1990-04-18

Family

ID=25873100

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89117509A Withdrawn EP0363705A1 (fr) 1988-10-11 1989-09-22 Métier à tisser pneumatique avec un moyen pour retirer de la foule un fil de trame défectueux

Country Status (3)

Country Link
EP (1) EP0363705A1 (fr)
JP (1) JPH02127545A (fr)
DE (1) DE3843399A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0356792A3 (fr) * 1988-09-01 1991-05-29 ELITEX koncern textilniho strojirenstvi Dispositif pour extraire automatiquement un fil de trame inséré et frappé sur les métiers à tisser
DE19510066A1 (de) * 1995-03-20 1996-05-30 Siemens Ag Verfahren zum Befüllen eines Flüssigmetall-Gleitlagers
WO1996038616A1 (fr) * 1995-06-02 1996-12-05 SULZER RüTI AG Procede permettant d'enlever un fil de trame sur un metier a tisser a ouverture des fils en serie

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH276690A (fr) * 1947-06-17 1951-07-31 Koninkl Tricotfabriek G J Will Dispositif d'arrêt d'une machine à travailler une nappe de fils.
FR2527655A1 (fr) * 1982-06-01 1983-12-02 Rueti Te Strake Bv Metier a tisser sans navette comprenant un moyen pour retirer des fils defectueux de trame, de la foule
EP0100939A2 (fr) * 1982-07-21 1984-02-22 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Procédé et dispositif pour traiter un fil de trame après l'arrêt d'un métier à tisser sans navette
DE3537714A1 (de) * 1984-10-24 1986-04-30 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi Verfahren zur handhabung eines schussfadens in einer schuetzenlosen webmaschine und vorrichtung zur durchfuehrung des verfahrens

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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.
JPS59228046A (ja) * 1983-06-03 1984-12-21 株式会社豊田自動織機製作所 無杼織機における緯糸処理方法
DE3863120D1 (de) * 1987-05-08 1991-07-11 Sulzer Ag Anordnung zum bergen eines defekten schussfadens aus dem webfach fuer webmaschinen.
CS275271B2 (en) * 1988-09-01 1992-02-19 Tovarny Textilnich Potreb Elit Device for choked and beaten-up weft removal on looms

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH276690A (fr) * 1947-06-17 1951-07-31 Koninkl Tricotfabriek G J Will Dispositif d'arrêt d'une machine à travailler une nappe de fils.
FR2527655A1 (fr) * 1982-06-01 1983-12-02 Rueti Te Strake Bv Metier a tisser sans navette comprenant un moyen pour retirer des fils defectueux de trame, de la foule
EP0100939A2 (fr) * 1982-07-21 1984-02-22 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Procédé et dispositif pour traiter un fil de trame après l'arrêt d'un métier à tisser sans navette
DE3537714A1 (de) * 1984-10-24 1986-04-30 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi Verfahren zur handhabung eines schussfadens in einer schuetzenlosen webmaschine und vorrichtung zur durchfuehrung des verfahrens

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0356792A3 (fr) * 1988-09-01 1991-05-29 ELITEX koncern textilniho strojirenstvi Dispositif pour extraire automatiquement un fil de trame inséré et frappé sur les métiers à tisser
DE19510066A1 (de) * 1995-03-20 1996-05-30 Siemens Ag Verfahren zum Befüllen eines Flüssigmetall-Gleitlagers
WO1996038616A1 (fr) * 1995-06-02 1996-12-05 SULZER RüTI AG Procede permettant d'enlever un fil de trame sur un metier a tisser a ouverture des fils en serie
US5950684A (en) * 1995-06-02 1999-09-14 Sulzer Rueti Ag Removal of a weft thread in a series shed weaving machine

Also Published As

Publication number Publication date
DE3843399A1 (de) 1990-04-12
JPH02127545A (ja) 1990-05-16

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