EP0828883A1 - Procede permettant d'enlever un fil de trame sur un metier a tisser a ouverture des fils en serie - Google Patents

Procede permettant d'enlever un fil de trame sur un metier a tisser a ouverture des fils en serie

Info

Publication number
EP0828883A1
EP0828883A1 EP96909003A EP96909003A EP0828883A1 EP 0828883 A1 EP0828883 A1 EP 0828883A1 EP 96909003 A EP96909003 A EP 96909003A EP 96909003 A EP96909003 A EP 96909003A EP 0828883 A1 EP0828883 A1 EP 0828883A1
Authority
EP
European Patent Office
Prior art keywords
weft thread
weft
removal
weaving
shed
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
EP96909003A
Other languages
German (de)
English (en)
Other versions
EP0828883B1 (fr
Inventor
Werner Degen
Urs Schaich
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.)
Itema Switzerland Ltd
Original Assignee
Sultex AG
Maschinenfabrik Rueti AG
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 Sultex AG, Maschinenfabrik Rueti AG filed Critical Sultex AG
Publication of EP0828883A1 publication Critical patent/EP0828883A1/fr
Application granted granted Critical
Publication of EP0828883B1 publication Critical patent/EP0828883B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D03D51/06—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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D41/00—Looms not otherwise provided for, e.g. for weaving chenille yarn; Details peculiar to these looms
    • D03D41/005—Linear-shed multiphase looms

Definitions

  • the invention relates to a method and a
  • a row shed weaving machine has a roller-shaped weaving rotor, which is partly wrapped in warp threads. Shed-forming elements are arranged on the surface of the weaving rotor, which hold the warp threads in a high shed position or in a deep shed position, so that a shed runs in the running direction of the weaving rotor, through which weft threads can be inserted by means of a fluid such as air.
  • a weaving rotor has a plurality of weaving shed open at the same time, so that a plurality of weft threads can be inserted into the weaving rotor at the same time.
  • Weft thread can no longer be removed, especially if the weft thread has already been cut on the weft insertion side. Such removal is necessary, for example, if the weft thread does not completely enter the shed due to a weft break or a plug formation in the area of the weft thread tip was entered. For example, a further
  • Warp thread breakage occur to eliminate under
  • a completely inserted weft thread may have to be removed.
  • the invention has for its object to provide a method and an apparatus for removing a weft thread in a row shed loom.
  • the advantages of the invention are to be seen in the fact that when an incorrectly inserted weft thread and / or a warp thread breakage, which is detected with a sensor, the weaving rotor is stopped before the inserted weft thread is struck against a fabric stop edge, so that the weft thread can be gripped with a weft thread removal device and is removable with high reliability.
  • the invention also has the advantage that the fabric stop edge is treated very gently when removing the weft thread, so that no starting points arise when the weaving process is resumed.
  • Fig. La a hook-shaped removal means
  • Fig. Lb, lc, lf a comb-like removal means
  • FIG. 1d shows a hasp-shaped removal means
  • Fig. Le a cutting device attached to the removal means
  • Fig. 2a-2d different positions of the weaving rotor
  • FIG. 3 is a perspective view of a series shed weaving machine
  • FIG. 4 shows a further perspective view of the part on the weft insertion side of a further row shed weaving machine
  • Fig. 5 shows a section through a fabric with auxiliary edges.
  • FIG. 3 shows a perspective view of components of a row shed loom, in particular a weaving rotor 1 with a weft distributing device 22, a weft removal device 13 and a holding device 21a on the weft insertion side and a holding device 21b on the weft arrival side.
  • the roller-shaped weaving rotor 1 has, on its surface, shed holding elements 4, which are arranged next to one another and run straight over the entire width B of the weaving rotor and thereby bring the warp threads 8a, 8b partially wrapping around the weaving rotor 1 into a high-shed or a deep-shed position, so that between the warp threads 8a, 8b a shed 16 is created, through which a weft thread 10a, 10b, 10c, 10d, 10e can be inserted.
  • shed holding elements 4 are arranged distributed over the entire circumference, in such a way that a plurality of weaving compartments 16 running in parallel are opened at the same time, through which one each Weft thread 10a, 10b, 10c, 10d, 10e can be entered.
  • 4 stop elements 9 are arranged between the shed holding members, which serve to strike the weft thread 10a against a fabric stop edge 11a.
  • four weft threads 10b, 10c, 10d, 10e are inserted at the same time, a weft thread distribution device 22 feeding the weft threads to an open shed 16.
  • the weft thread 10a is already complete, over the entire width B of the
  • the holding device 21a, 21b has an elastic band 23, between which the weft thread 10a is held. Deflection rollers 24 and a support element 25 define the course of the elastic band 23.
  • a stretching nozzle 20 is arranged on the weft arrival side 1b in order to keep a just inserted weft thread 10b stretched until it is gripped by the holding device 21b and further conveyed.
  • Sensors 26 for monitoring the weft threads 10a, 10b, 10c, 10d, 10e can be arranged on the surface of the weaving rotor 1 and on the weft insertion side la or on the weft arrival side lb.
  • a sensor 26 is arranged on the weft arrival side 1b in order to monitor a complete entry of the weft thread 10a.
  • the sensor 26 is via an electrically conductive connection means 26a connected to a downstream evaluation electronics.
  • the warp threads 8a, 8b can also be monitored with sensors in order to determine a warp thread break.
  • a weft removal device 13 is arranged above the weaving rotor 1 and comprises a removal means 13a, which is connected to a drive device 13k via connecting means 131. Electromotive drives are provided in the drive device 13k in order to displace the removal means 13a in a translatory and / or rotary movement.
  • the drive device 13k can also be movable by other types of drive, for example by pneumatic drives.
  • FIG. 2a shows a side view of a weaving rotor 1 rotating in the direction of rotation 14 with a center of rotation 15.
  • Anchoring elements 3 are arranged on its cylindrical base body 2, each holding a compartment holding element 4 and a stop element 9.
  • the compartment holding member 4 has a guide section 5, in which warp threads 8a are inserted in such a way that they are held in a high compartment position.
  • Further warp threads 8b run next to the shed holding element 4, so that these warp threads 8b assume a low position, so that a shed 16 is created between the warp threads 8a, 8b, through which a weft thread 10b, running inside the shed holding element 4, with the aid of a fluid such as air in the Web rotor 1 can be entered.
  • the warp threads 8a, 8b run over a fabric table 12, the fabric 11 being produced resting on the fabric table 12 and one
  • Tissue stop edge 11a is formed.
  • the weft thread 10a is held by the warp threads 8a, 8b, and has been brought into the position shown running from the channel 4a via the opening 4b.
  • a removal means 13a with a needle 13b is arranged above the weaving rotor 1. Not the drive 13k moving the removal means 13a is shown.
  • the removal means 13a can have, for example, a hook-shaped needle I3e, which, as shown in FIG.
  • the removal means can also be designed as a rotating, hook-shaped or hasp-shaped removal means 13i which comprises a hook-shaped removal part 13f which is rotatably mounted about a center of rotation 13g in the direction of rotation 13h.
  • a rotating removal means 13i can be arranged outside the weaving width B, on the weft insertion side la or on the weft arrival side lb.
  • Fig. 4 shows a weft entry side la arranged
  • Removal means 13i The weft thread la was cut by a rotating cutting device 27, so that the end of the weft thread 10a is held by the holding device 21a. Rotation of the removal means 13i causes, as in FIG an immersion of the hook-shaped removal part 13f between the fabric stop edge 11a and the weft thread 10a, so that the weft thread 10a is gripped and pulled out of the warp threads 8a, 8b during winding on the removal means 13i. In addition, the weft thread 10a is pulled out of the holding device 21a, so that the weft thread 10a is completely removed by the removal means 13i.
  • Removing the weft thread 10a usually also requires the weft threads 10b, 10c, 10d and 10e which have not yet been completely inserted to be removed, in order to ensure that the weaving rotor 1 starts up correctly. Since the weft threads 10b, 10c, 10d, 10e, 10o, 10d, 10e, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10d, 10
  • the weft threads 10b, 10c, 10d, 10e located in the weaving rotor 1 can also be separated from the supplied thread by a separate cutting device and completely removed by a further weft removal device or by hand.
  • FIG. 2b the weft thread 10b still present in FIG. 2a was withdrawn by the weft thread conveying device and removed in this way. Removing the weft thread 10a in the situation shown in FIG. 2b can be difficult, for example if the weft thread 10a and the warp threads 8a, 8b are designed such that they exert a high frictional force on one another, so that the weft thread is pulled out 10a from the warp threads 8a, 8b is hardly possible or only with great force.
  • the weaving rotor 1 is stopped, as shown in FIG. 2b, and the needles 13b of the removal means 13a are immersed in the warp threads 8a, 8b over the entire weaving width B.
  • the weaving rotor 1 is then rotated further, as shown in FIG. 2c, with the removal means 13a being moved in such a way that the weft thread 10a is struck against the fabric edge 11a, the needles 13b coming to lie between the weft thread 10a and the fabric edge 11a.
  • opening the shed 16a further, as shown in FIG.
  • the weft 10a is pushed by the removal means 13a with the needle 13b away from the fabric stop edge 11a in the direction of the shed 16a, so that the weft 10a is relatively loosely between the warps 8a, 8b comes to rest.
  • Weft thread 10a can then be removed with a rotating removal means 13i or, for example, with a hook 13e in the manner already described.
  • a rotating removal means 13i or, for example, with a hook 13e in the manner already described.
  • the distance between the individual needles 13b, or between the Tufts 13d selected differently. A distance of less than or equal to 15 mm has proven to be an advantageous distance between the individual needles 13b or tufts 13d.
  • Fig. 5 shows a longitudinal section through a fabric.
  • the weft thread 10a is held on the weft insertion side la by an elastic band 23, runs through between the warp threads 8a, 8b and is held on the weft arrival side lb by a further elastic band 23.
  • the useful fabric has a width B, a zone C without warp threads 8a, 8b following the useful fabric, and then an auxiliary edge D formed by the weft thread 10a and warp threads 8a, 8b.
  • a removal means 13a comprising one, is arranged above the tissue
  • the removal means 13a also has a cutting device 13m on both sides, which cuts the weft thread 10a in zone C when the needles 13b are immersed in the warp threads 8a, 8b, so that the weft thread 10a is easier to remove from the useful fabric with a width B.
  • FIG. 1f again shows an exemplary embodiment of a removal means 13a with crossbeams 13c and regularly spaced needles 13b, with the
  • Crossbar 13c is arranged a cutting device 13m, which in the present embodiment is designed as a blade with cutting edge 13n.
  • Fig. Le shows a side view of the blade 13m with cutting edge 13n, which between the tissue stop edge 11a and the
  • weft thread 10a is immersed, so that the weft thread 10a is cut, either by the weft thread 10a being pressed against the cutting edge 13n, or by the cutting edge 13n being moved towards the weft thread 10a.
  • the weaving rotor 1 must be braked very quickly, as shown in FIG. 2b, in a fraction of a revolution of the weaving rotor 1. This is made possible by a braking device acting on the weaving rotor, which acts exclusively on the weaving rotor, so that the weaving rotor
  • Web rotor 1 is braked asynchronously to the movement of the other components. This allows the weaving rotor to be braked very quickly.
  • the braking device is not shown. It advantageously acts on the central shaft of the weaving rotor.
  • the asynchronous braking of the weaving rotor 1 has the advantage that the weaving rotor can be braked with the entire braking force available from the braking device without taking into account the movement of further components of the row shed weaving machine. As a result, the weaving rotor 1 can be braked as quickly as possible.
  • the weaving rotor is advantageously driven by a separate electric motor, so that the weaving rotor 1 is kinematically completely separated from the other components of the row shed weaving machine.
  • the braking device can be provided as a separately arranged device which exerts a braking effect on the weaving rotor if necessary. It is also possible to use the electric motor as a braking device in order to bring the weaving rotor to a standstill.
  • the weaving rotor 1 and the other components of the row shed weaving machine are brought into a defined mutual position before the weaving rotor and the components, which are now moving again in synchronization, are started in order to resume weaving operation.
  • the mutually defined position can be assumed automatically by the row shed weaving machine, since the individual components are monitored with a rotation angle sensor, so that their current rotation angle is known, and the individual components can be brought into a predetermined angular position by electric motor drives.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

L'invention concerne un procédé permettant d'enlever un fil de trame (1a) sur un métier à tisser comportant un rotor de tissage (1) pour former une foule de tissage (16). Selon ce procédé, un état qui nécessite d'enlever un fil de trame (10a) inséré, est détecté à l'aide d'un détecteur (26), le rotor de tissage (1) est arrêté après détection de l'état mentionné, avant que le fil de trame (10a) ne vienne buter contre une arête de butée du textile (11a), et le fil de trame (10a) à enlever est éliminé par un dispositif d'élimination de fil de trame (13).
EP96909003A 1995-06-02 1996-04-26 Procede permettant d'enlever un fil de trame sur un metier a tisser a ouverture des fils en serie Expired - Lifetime EP0828883B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH163995 1995-06-02
CH1639/95 1995-06-02
CH163995 1995-06-02
PCT/CH1996/000160 WO1996038616A1 (fr) 1995-06-02 1996-04-26 Procede permettant d'enlever un fil de trame sur un metier a tisser a ouverture des fils en serie

Publications (2)

Publication Number Publication Date
EP0828883A1 true EP0828883A1 (fr) 1998-03-18
EP0828883B1 EP0828883B1 (fr) 2002-02-06

Family

ID=4215172

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96909003A Expired - Lifetime EP0828883B1 (fr) 1995-06-02 1996-04-26 Procede permettant d'enlever un fil de trame sur un metier a tisser a ouverture des fils en serie

Country Status (5)

Country Link
US (1) US5950684A (fr)
EP (1) EP0828883B1 (fr)
AU (1) AU5268296A (fr)
DE (1) DE59608709D1 (fr)
WO (1) WO1996038616A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1014791A6 (nl) * 2002-04-22 2004-04-06 Picanol Nv Weefmachine.
EP2006430B1 (fr) * 2007-06-22 2010-11-10 Promatech S.p.A. Dispositif de séparation et procédé de suppression d'une trame défectueuse dans un métier à tisser
FR2981091B1 (fr) * 2011-10-06 2013-12-20 Michelin Soc Tech Dispositif et procede d'extraction de trames dans une nappe de renfort destinee a la fabrication d'un pneumatique

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502512A (en) * 1982-07-21 1985-03-05 Seisakusho Kabushiki Kaisha Toyoda Jidoshokki Method for treating a weft yarn upon stoppage of a shuttleless loom and device for effecting the same
JPS59216956A (ja) * 1983-05-20 1984-12-07 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
FR2583435B1 (fr) * 1985-06-14 1987-09-18 Picanol Nv Procede et dispositif d'extraction de fils de trame defectueux d'un metier a tisser sans navette
DE3843399A1 (de) * 1988-10-11 1990-04-12 Dornier Gmbh Lindauer Luftwebmaschine mit einer vorrichtung zur entfernung eines fehlerhaften schussfadens aus dem webfach
EP0582763B1 (fr) * 1992-08-11 1996-10-16 Sulzer RàœTi Ag Dispositif pour maintenir les fils de trames dans des métiers à tisser multiphase à foule linéaire
EP0625601B1 (fr) * 1993-05-21 1997-01-15 Sulzer RàœTi Ag Dispositif de coupe pour fils de trame et métier à tisser avec un tel dispositif
EP0685585B1 (fr) * 1994-05-30 1999-06-09 Sulzer RàœTi Ag Dispositif et méthode pour remédier des irrégularitiés à l'insertion d'un fil de trame dans un rotor de tissage sur un métier à tisser multiphase
DE59408395D1 (de) * 1994-05-30 1999-07-15 Rueti Ag Maschf Vorrichtung und Verfahren zur Behebung von Unregelmässigkeiten beim Eintrag eines Schussfadens in einen Webrotor einer Reihenfachwebmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9638616A1 *

Also Published As

Publication number Publication date
EP0828883B1 (fr) 2002-02-06
DE59608709D1 (de) 2002-03-21
US5950684A (en) 1999-09-14
AU5268296A (en) 1996-12-18
WO1996038616A1 (fr) 1996-12-05

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