EP0351361A1 - Appareil pneumatique pour la formation de lisières dans les métiers à tisser - Google Patents

Appareil pneumatique pour la formation de lisières dans les métiers à tisser Download PDF

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Publication number
EP0351361A1
EP0351361A1 EP89810488A EP89810488A EP0351361A1 EP 0351361 A1 EP0351361 A1 EP 0351361A1 EP 89810488 A EP89810488 A EP 89810488A EP 89810488 A EP89810488 A EP 89810488A EP 0351361 A1 EP0351361 A1 EP 0351361A1
Authority
EP
European Patent Office
Prior art keywords
shed
section
needle
laying
tip
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
EP89810488A
Other languages
German (de)
English (en)
Other versions
EP0351361B1 (fr
Inventor
Gotthilf Bertsch
Josef Braun
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.)
Sulzer AG
Original Assignee
Sulzer AG
Gebrueder Sulzer 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 Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of EP0351361A1 publication Critical patent/EP0351361A1/fr
Application granted granted Critical
Publication of EP0351361B1 publication Critical patent/EP0351361B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/40—Forming selvedges
    • D03D47/48—Forming selvedges by inserting cut end of weft in next shed, e.g. by tucking, by blowing

Definitions

  • the invention relates to a pneumatic last laying device for a weaving machine, with a laying needle for inserting an end of a weft thread struck by a reed against the edge of the fabric into a portion of a subsequent loom located between the reed and the fabric, which laying needle in an end section which can be inserted into the shed and which has a reed-side long side, a fabric-side long side and two broad sides, contains a thread inlet opening.
  • a strip laying device of this type known from EP-PS 0 149 969 has a band-shaped laying needle with a rectangular cross section.
  • the known laying needle contains a round needle eye; since the laying needle is relatively narrow, the diameter of the needle eye cannot be large.
  • the length of the section of the weft thread end that spans the needle eyelet before threading is thus only small. Accordingly, the weft thread end can only be bent using a high blowing pressure of a threading nozzle and threaded into the needle eye. The air consumption is therefore relatively large.
  • the known laying needle is also provided with a tip that is in the middle of the width of the Broad sides of the end portion containing the needle eye is formed.
  • a strip laying device known from CH-PS 514 705 contains a suction laying needle with a round cross-section. Although this laying needle has a correspondingly enlarged suction mouth formed by a beveling of the needle end, this known embodiment, like the device mentioned at the outset, also results in a relatively large minimum distance which is unfavorable for the formation of a uniform fabric strip and the Loom compartment.
  • the invention has for its object to provide a last laying device of the type defined, the laying needle can perform their swiveling in and out movements close to the shed tip. Furthermore, the needle eye should be large so that the spanned length of the weft thread is large.
  • this object is achieved by the features specified in the characterizing part of claim 1.
  • the inventive formation of the laying needle ensures precise detection and uniform integration of the inserted weft thread end, and thus the formation of a uniform fabric strip of constant width.
  • warp threads 1 located in the high shed and warp threads 2 located in the shed of the weft-side edge region 3 of the chain of an air jet loom during the open position of the shed 5.
  • the fabric 6 made from the warp threads 1, 2 and weft threads 10 is guided from the shed tip 5 'according to arrow 4 via a breast tree, not shown, against the fabric tree of the weaving machine.
  • a strip laying device is assigned to each of the edge areas 3, the structure and function of which are described in more detail, for example, in EP-PS 0 149 969-A1 mentioned at the beginning.
  • the strip laying devices each contain a laying needle 18, of which only one end section 20 which is essential for the embodiment according to the invention and can be inserted into the shed 5 is shown in the drawing.
  • the laying needle 18 executes a pivoting movement according to arrow 8 through the high shed warp threads 1 into the shed 5 with each revolution of the main shaft of the weaving machine and, after gripping the weft thread end 7, swings out of the shed 5 in a corresponding swiveling movement led out.
  • the laying needle 18 is in the form of a band at least in the end section 20 and is provided at the free end with a thread inlet opening formed by a needle eyelet 21.
  • the needle eye 21 has an elongated shape 22, the long axis 19 of which coincides with the longitudinal axis of the end section 20 of the laying needle 18.
  • the longer edge portions 22a and 22b of the needle eyelet 21 run parallel to the long axis 19.
  • the shorter edge portion 22c of the needle eyelet 21, which leads in the pivoting direction of the laying needle 18, is directed obliquely forward to the shed tip 5 'in the insertion direction (arrow 8) and forms an acute-angled corner portion 23 with the fabric-side edge part 22a.
  • the leading end face 24 of the laying needle 18 runs obliquely, such that a tip 28 is formed on the reed-side long side 27 of the laying needle 18 facing away from the shed tip 5 '.
  • the tip 28 is also tapered by at least one or, as shown, by two bevels 28a and 28b each extending over the broad sides 29 and 30 of the laying needle 18.
  • the laying needle 18, or at least its end section 20 can be designed with a rectangular cross-section determined by mutually parallel broad sides 29, 30 and narrow long sides 26 and 27.
  • the laying needle 18 tapers over its end portion 20 in the direction of the shed tip 5 ', such that its upper broad side 29 in the position pivoted into the shed 5 is approximately parallel to the high shed warp threads 1 runs, while its lower broad side 30 runs approximately parallel to the shed middle plane 5 ⁇ .
  • the shape of the cross-section 31 of the laying needle 18 corresponds to the shape of the upper partial cross-section 32 of the at least partially open shed 5, which is delimited in the upper shed half 1 'by the high shed warp threads 1 and the middle plane 5 ⁇ .
  • a corresponding cross section of the laying needle 18 can be adapted to the shape of the lower partial cross section of the shed 5, delimited by the deep shed warp threads 2 and the middle plane 5 ⁇ .
  • the cross section 31 of the laying needle 18 can also be adapted to the shape of the full cross section of the partially opened shed 5, delimited by the high shed and deep shed warp threads 1 and 2.
  • both broad sides 29 and 30 of the laying needle 18 each taper approximately over half the thickness of the cross section 31 from the long side 27 on the reed side to the long side 26 of the length section 20 on the fabric side.
  • the weft thread 10 is cut with a pair of scissors 33 after the blowing nozzle 16, which blows the weft thread end 7 into the catching nozzle 17, which keeps it taut, has been switched on shortly before.
  • the laying needle 18 has now emerged from the shed 5 towards the end of its pivoting-in movement and is at a standstill in a position 18 '(FIG. 1) in which its needle eye 21 lies above a threading nozzle 34.
  • the blowing nozzle 16 and the catching nozzle 17 are then switched off and the threading nozzle 34 is switched on.
  • the weft thread end 7 is pulled out of the catch nozzle 17 and threaded into the needle eye 21 by the threading nozzle 34 blowing into the needle eye 21.
  • the threading nozzle 34 is switched off.
  • the laying needle 18 begins its swiveling-out movement via the position 18 1 (FIG. 1) from the shed 5, with the detected weft end 7 being drawn into the shed 5.
  • the shed change takes place, so that the inserted weft end 7 is clutched and bound in a known manner by the warp threads of the newly created shed.
  • the weft thread end 7 is struck simultaneously with this weft thread 35 and then forms part of the fabric strip 6'.
  • the length of the weft thread section 36 which spans the needle eyelet 21 at least approximately parallel to its longer axis prior to threading, is relatively large, so that the bending of the section 36 is facilitated and thus the threading with low blowing pressure the threading nozzle 34 is made possible.
  • the formed on the long side 27 on the reed side 28 on the laying needle 18 facilitates the sharing of the high shed warp threads 1 when immersed in the shed 5, since the warp threads 1 and 2 are more elastic in this area than in the shed lace 5 ', so that they correspond accordingly be used less.
  • the holding effect of an acute-angled corner portion 39 formed in the needle eyelet 21 on a laying needle 37 can be further increased by a groove 38 in the upper broad side 29 of the laying needle 37 which is trough-shaped in cross section and which extends from the corner portion 39 extends to the end face 24 of the laying needle 37 and in which the weft end 7 'is guided non-slip.
  • this can counteract a tendency to stretch which is inherent in these yarns.
  • the end face 24 of the laying needle 37 - like that of the laying needle 18 - can be made concave. It goes without saying that a corresponding, convex version of the Front 24 is possible.
  • a corresponding groove can also be provided on the lower broad side 30 instead of or in addition to the groove 38 arranged on the upper broad side 29.
  • the strip laying device contains a hollow suction laying needle 40 which detects the weft thread end 41 to be inserted by the suction effect at its mouth 42 forming the thread inlet opening.
  • the laying needle 40 has, at least in its end section 45 which can be pivoted into the shed 44, an approximately triangular cross section 43, the shape of which, as shown, corresponds to the shape of the upper partial cross section 46 of the shed 44, which is delimited by the high shed warp threads 47 and the central plane 44 ⁇ of the shed 44, at least partially open shed 44 is adjusted.
  • the cross section 43 can be adapted to the shape of the lower partial cross section or the full cross section of the shed 44.
  • at least the end section 45 of the laying needle 40 can be designed with an elongated hollow cross section determined by parallel broad sides 29, 30 and narrow long sides 26, 27.
  • the front side 48 of the laying needle 40 leading in the pivoting direction (arrow 8) runs obliquely, in such a way that a tip 49 is formed on the long side 27 of the laying needle 40 facing away from the shed tip 44 '.
  • the laying needle 40 is connected intermittently to a vacuum source, not shown, via a flexible tube 50 or a corresponding vacuum rotary connection.
  • the mouth 42 is located above that already provided by scissors 52 severed and held by the catching nozzle 17 weft end 41, which spans the mouth 42 substantially parallel to the longitudinal extension of the length portion 45 or the pivoting direction of the laying needle 40.
  • the weft thread end 41 is grasped and sucked in by the suction effect at the mouth 42.
  • the laying needle 40 begins its pivoting movement, thereby pulling the detected weft end 41 according to the dash-dotted line 41 'into the shed 44.
  • the strip laying device according to the invention is not limited to use on air jet looms, but can also be used on looms of other types, e.g. on rapier looms or projectile looms.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP89810488A 1988-07-14 1989-06-27 Appareil pneumatique pour la formation de lisières dans les métiers à tisser Expired - Lifetime EP0351361B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH270688 1988-07-14
CH2706/88 1988-07-14

Publications (2)

Publication Number Publication Date
EP0351361A1 true EP0351361A1 (fr) 1990-01-17
EP0351361B1 EP0351361B1 (fr) 1992-04-15

Family

ID=4239766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810488A Expired - Lifetime EP0351361B1 (fr) 1988-07-14 1989-06-27 Appareil pneumatique pour la formation de lisières dans les métiers à tisser

Country Status (4)

Country Link
US (1) US4984608A (fr)
EP (1) EP0351361B1 (fr)
JP (1) JPH0268335A (fr)
DE (1) DE58901147D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0431484A1 (fr) * 1989-12-06 1991-06-12 Klöcker-Entwicklungs-GmbH Dispositif pour former une lisière de rentrage
EP0483067A1 (fr) * 1990-10-22 1992-04-29 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif de rentrage des fils de trame pour un métier à tisser sans navette
EP0562213A1 (fr) * 1992-03-26 1993-09-29 Sulzer RàœTi Ag Appareil pneumatique pour la formation de lisières dans les métiers à tisser
EP0898001A2 (fr) * 1997-08-04 1999-02-24 GIVIDI-Italia S.p.A. Méthode de coupe de la lisière
IT201900000631A1 (it) * 2019-01-15 2020-07-15 Rinaldo Sperotto Cimossatrice elettro-pneumatica
WO2022008960A1 (fr) * 2020-07-10 2022-01-13 Rinaldo Sperotto Machine de lisière électro-pneumatique

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548846C1 (de) * 1995-12-27 1996-10-10 Dornier Gmbh Lindauer Verfahren und Vorrichtung zum Einlegen eines Schußfadens
JP3348056B2 (ja) * 1999-10-01 2002-11-20 津田駒工業株式会社 無杼織機におけるタックイン装置
DE50300789D1 (de) * 2002-04-26 2005-08-25 Sultex Ag Rueti Fang- und Haltevorrichtung für das fangseitige Schussfadenende in einer Webmaschine
JP2004197281A (ja) * 2002-12-20 2004-07-15 Tsudakoma Corp 織機の糸端吸引装置
DE102004059780B4 (de) * 2004-12-07 2020-10-15 Kikuchi Kogyo Co., Ltd. Verfahren zur Herstellung eines auf Nadelwebmaschinen gewebten Bandes mit webtechnisch gleichen Kanten

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE725262C (de) * 1939-09-02 1942-09-18 Sulzer Ag Vorrichtung zum Herstellen fester Kanten bei Geweben
DE2036401A1 (de) * 1969-07-22 1971-04-29 Wsesojusnyj nautschno lssledowatels kij Institut ljochkowo i textilnowo ma schinostojenija SSSR, Moskau Leistenbildende Einrichtung der Web maschine
FR2141808A1 (fr) * 1971-06-18 1973-01-26 Dewas Raymond
EP0134377A1 (fr) * 1983-09-01 1985-03-20 Maschinenfabrik Sulzer-Rüti Ag Dispositif pour replier les bouts de fil de trame dans un métier à tisser
EP0149969A1 (fr) * 1984-01-23 1985-07-31 GebràœDer Sulzer Aktiengesellschaft Métier à tisser

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE488939C (de) * 1925-05-29 1930-01-10 Karl Mischke Verfahren und Maschine zum Naehen von Festons
US4194457A (en) * 1978-11-22 1980-03-25 Spencer Wright Industries, Inc. Tufting machine needles
BE1000903A4 (nl) * 1987-09-02 1989-05-09 Picanol Nv Kanteninlagapparaat voor weefmachines.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE725262C (de) * 1939-09-02 1942-09-18 Sulzer Ag Vorrichtung zum Herstellen fester Kanten bei Geweben
DE2036401A1 (de) * 1969-07-22 1971-04-29 Wsesojusnyj nautschno lssledowatels kij Institut ljochkowo i textilnowo ma schinostojenija SSSR, Moskau Leistenbildende Einrichtung der Web maschine
FR2141808A1 (fr) * 1971-06-18 1973-01-26 Dewas Raymond
EP0134377A1 (fr) * 1983-09-01 1985-03-20 Maschinenfabrik Sulzer-Rüti Ag Dispositif pour replier les bouts de fil de trame dans un métier à tisser
EP0149969A1 (fr) * 1984-01-23 1985-07-31 GebràœDer Sulzer Aktiengesellschaft Métier à tisser

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0431484A1 (fr) * 1989-12-06 1991-06-12 Klöcker-Entwicklungs-GmbH Dispositif pour former une lisière de rentrage
EP0483067A1 (fr) * 1990-10-22 1992-04-29 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif de rentrage des fils de trame pour un métier à tisser sans navette
EP0562213A1 (fr) * 1992-03-26 1993-09-29 Sulzer RàœTi Ag Appareil pneumatique pour la formation de lisières dans les métiers à tisser
US5316050A (en) * 1992-03-26 1994-05-31 Gebrueder Sulzer Aktiengesellschaft Air-operated selvage laying equipment for looms
EP0898001A2 (fr) * 1997-08-04 1999-02-24 GIVIDI-Italia S.p.A. Méthode de coupe de la lisière
EP0898001A3 (fr) * 1997-08-04 1999-12-08 GIVIDI-Italia S.p.A. Méthode de coupe de la lisière
IT201900000631A1 (it) * 2019-01-15 2020-07-15 Rinaldo Sperotto Cimossatrice elettro-pneumatica
WO2022008960A1 (fr) * 2020-07-10 2022-01-13 Rinaldo Sperotto Machine de lisière électro-pneumatique

Also Published As

Publication number Publication date
DE58901147D1 (de) 1992-05-21
EP0351361B1 (fr) 1992-04-15
JPH0268335A (ja) 1990-03-07
US4984608A (en) 1991-01-15

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