EP1377701B1 - Pince de serrage pour machines a tisser a joint - Google Patents

Pince de serrage pour machines a tisser a joint Download PDF

Info

Publication number
EP1377701B1
EP1377701B1 EP02730046A EP02730046A EP1377701B1 EP 1377701 B1 EP1377701 B1 EP 1377701B1 EP 02730046 A EP02730046 A EP 02730046A EP 02730046 A EP02730046 A EP 02730046A EP 1377701 B1 EP1377701 B1 EP 1377701B1
Authority
EP
European Patent Office
Prior art keywords
thread
cylinder
clamping element
gripping collet
collet
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 - Lifetime
Application number
EP02730046A
Other languages
German (de)
English (en)
Other versions
EP1377701A1 (fr
EP1377701B8 (fr
Inventor
Edgar Hofstetter
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.)
Huyck Wangner Germany GmbH
Original Assignee
Wangner 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 Wangner GmbH filed Critical Wangner GmbH
Publication of EP1377701A1 publication Critical patent/EP1377701A1/fr
Publication of EP1377701B1 publication Critical patent/EP1377701B1/fr
Application granted granted Critical
Publication of EP1377701B8 publication Critical patent/EP1377701B8/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
    • D03D41/00—Looms not otherwise provided for, e.g. for weaving chenille yarn; Details peculiar to these looms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms

Definitions

  • the invention relates to a collet for detecting a thread.
  • the collet is arranged at the tip of a movable gripping arm of a pull-through gripper, which serves for introducing the thread, a so-called auxiliary weft thread, into the seam weaving compartment in a seam weaving machine.
  • a dewatering screen or forming fabric is used to dewater the paper web which initially consists primarily of water fractions.
  • the Entskyss mecanicssiebe consist of Kunststoffmonofil Düsseldorfn and are woven on wide weaving machines, then made endless with a provisional seam us heat-set on fixing machines, so that the cranks of the warp and weft threads are permanently imprinted.
  • the dewatering screens are again cut apart and stitched in a final process step by means of a woven seam to form an endless cloth.
  • the woven seam is an extremely sensitive as well as time-consuming step in the production process of a dewatering screen. To improve this time-consuming work process, weaving machines or seaming machines have been developed.
  • warp threads are exposed over a length of, for example, 15 cm to the fabric ends to be joined together by removing the weft threads in this area. From the resultant warp thread fringes and the weft threads removed from the fabric end, the so-called woven seam is then formed, in which the original fabric weave is exactly restored.
  • an auxiliary weaving shed or seam shed is stretched out of the removed weft threads, in which the removed weft threads act as auxiliary warp threads.
  • this seam weave become alternately From the two fabric ends the warp thread fringes entered as auxiliary weft threads.
  • a separator From the plurality of warp thread fringes protruding from each end of the fabric, a separator ( DE-U-87 13 074 . EP-A-0 301 174 and DE-U-90 02 278 ) a Kettfadenfranse removed and held.
  • a transfer gripper transports this warp thread fringe to a pull-through gripper, which then inserts it as an auxiliary weft thread into the seam weaving shed, in such a way that the auxiliary weft thread initially lies tightly in the seam weaving shed.
  • the pull-through gripper is of the type mentioned above and is for example from the DE-U-81 22 449 , of the EP-A-0 043 441 and the EP-A-0 236 601 known. The presence of the warp thread fringe is no longer checked by the pull-through gripper.
  • the auxiliary weft thread must be held by the collet, which is integrated in the pull-through gripper, with different voltages.
  • known collet consists of a collet body and a pressure piece, which is moved by a pneumatic cylinder. Between a flat clamping surface on the collet body and a flat surface on the pressure piece which are parallel to each other, the auxiliary weft yarn is tensioned with a corresponding pressure generated by the pneumatic cylinder.
  • New, more complex fabric designs require on the one hand a particularly high clamping force when pulling in and on the other hand a more sensitive, ie lower, clamping force during rolling in. This can not always be achieved by the collets with flat, parallel clamping surfaces collet body and on the pressure piece.
  • the invention has for its object to provide a collet, which can be controlled so that on the one hand securely holds the thread, so that a high tensile force can be exerted on the thread, and that on the other hand, a very low clamping force can be reproduced reproducible ,
  • this object is achieved in that the first clamping element has two spaced cylindrical surfaces and that the second clamping element has a cylindrical surface, wherein the arrangement of the cylindrical surfaces is such that the axes of the cylindrical surfaces are parallel to each other and substantially perpendicular to the axis of the pneumatic cylinder and in the extended state of the pneumatic cylinder, the cylindrical surface of the second clamping element lies between the two cylindrical surfaces of the first clamping element.
  • An advantage of the collet according to the invention is that it is largely insensitive to contamination.
  • the clamping force is only slightly influenced by adhering dirt.
  • the collet 10 is a total of cylindrical and is composed of a clamping body 12 and a pneumatic cylinder 14, which are connected by means of an adapter ring 16.
  • the clamping body 12 has a transverse cut, which forms a mouth 18. At the front end of the mouth, two cylinder body 20 are inserted or arranged, whose distance is about 70% of its diameter and whose axes are perpendicular to the axis of the collet 10, wherein both cylinder body 20 have the same distance from this axis.
  • the cylinder body 20 represent a first clamping element.
  • a pressure piece 22 is provided, in the end face of another cylinder body 24 is inserted or arranged.
  • the axis of the further cylinder body 24 is also at right angles to the axis of the collet 10, wherein this cylinder body 24 is located exactly on the axis of the collet 10.
  • the pressure member 22 is guided against rotation in the clamping body 12, so that the parallel alignment of the axes of the cylinder body 20, 24 is always guaranteed.
  • the piston 25 is reset by a return spring 26 in the open position shown in FIGS. 1 and 5.
  • the further cylinder body 24 constitutes a second tensioning element.
  • the pressure member 22 can be extended with the other cylinder body 24, so that a thread F inserted into the mouth 18 as shown in Fig. 2, between the cylinder bodies 20, 24 is deformed and thereby tightened, i. is held by clamping and deformation.
  • a pin 28 pointing in the axial direction is further fastened above the further cylinder body 24 (not shown in FIGS. 2 and 3) which, when extending into a suitable bore 30, is inserted at the tip of the clamping body 12 (FIG ).
  • This pin 28 prevents a captured in the collet 10 thread F could solve in the radial direction from the collet 10.
  • the diameter of the pin 28 is slightly smaller than that Distance of the cylinder body 20 so that the pin 28 can drive between the two cylinder bodies 20 through.
  • the cylinder bodies 20, 24 are made of a hard, abrasion resistant material, e.g. Carbide or ceramic. They are attached in matching cavities on the clamping body 12 and on the pressure piece 22.
  • the cylinder bodies 20, 24 can also be integrated in the shape of the clamping body 12 and the pressing piece 22.
  • the clamping body 12 and the pressure piece 22 are then made entirely of the hard, abrasion-resistant material.
  • first and second clamping elements are formed as complete cylinder body, but that the mutually facing surfaces of the first and second clamping elements are curved about parallel axes.
  • the operation of the collet is explained below.
  • the thread F which is a warp thread fringe or so-called auxiliary weft thread, is inserted in the usual manner by a transfer gripper into the mouth 18 of the collet 10.
  • the pneumatic cylinder 14 is then pressurized, so that the further cylinder body 24 is moved to the cylinder bodies 20 and the inserted thread F is clamped between the cylinder bodies 20, 24, wherein the thread is cranked or deformed as shown in Fig. 2.
  • the cylinder body 20, 24 press with their cylindrical surfaces in the thread F and give the thread a resulting frictional force and wrap friction force.
  • the collet forms the front end of a conventional and therefore not shown pull-through gripper.
  • the head of the pull-through gripper After the detection of the thread F, the head of the pull-through gripper is moved through the seam weaving compartment, so that the thread comes to rest as an auxiliary weft thread in the seam weaving compartment.
  • the auxiliary weft thread is the fringe of a warp thread, so that it has the permanently applied by the above-mentioned heat setting waveform.
  • the auxiliary warp threads likewise have a wave form permanently applied by the heat setting.
  • the corrugations of the auxiliary weft threads and the auxiliary warp threads conform to each other according to the weave pattern. This results in a positive connection of a very high strength of the woven seam guaranteed.
  • the troughs and mountains of the auxiliary weft threads and the auxiliary warp threads can fit into each other according to the Geweberapport, a very high tension must be applied to the auxiliary weft threads after passing through the shed. This high tensile stress is generated by the pull-through gripper, to which the auxiliary weft thread F must be clamped as firmly as possible in the collet 10.
  • the pressure in the pneumatic cylinder 14 is therefore reduced so far that it approximately compensates for the force of the return spring 26 (force balance).
  • the pressure piece 22 with the further cylinder body 24 is thereby moved back slightly by the thread F, which elastically relaxes after the reduction of the gas pressure in the pneumatic cylinder 14 in the direction of its diameter, as can be seen in FIG.
  • the force balance between the gas pressure in Pneumatic cylinder and the force of the return spring 26 floats the pressure piece 22, ie it exerts neither in one direction nor in the other direction of a force and is pressureless to the thread F on.
  • the auxiliary weft thread F is therefore held only by the belt friction in the collet 10, while it is rolled from the sley along the selvedge.
  • the necessary time control of the pressure in the pneumatic cylinder 14 takes place in a known manner by means of signals which are derived from the control of the seam loom.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Processing Of Terminals (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Supports For Pipes And Cables (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (5)

  1. Pince de serrage (10) pour la saisie d'un fil (F) lors de la fabrication d'une couture tissée, la pince de serrage étant disposée à l'extrémité d'une griffe de traction et présentant un corps de pince de serrage (12), un cylindre pneumatique (14) avec un piston (25), qui peut être rentré et sorti, et un premier élément de serrage et un deuxième élément de serrage, le premier et le deuxième éléments de serrage (20, 24) pouvant être serrés l'un contre l'autre à l'aide du cylindre pneumatique en vue de la saisie du fil (F), caractérisée
    - en ce que le premier élément de serrage présente deux surfaces (20) de cylindre espacées et
    - en ce que le deuxième élément de serrage présente une surface de cylindre (24),
    - la disposition des surfaces de cylindre (20, 24) étant telle que les axes des surfaces de cylindre se situent d'une manière parallèle l'un par rapport à l'autre et pour l'essentiel à angle droit par rapport à l'axe du cylindre pneumatique (14) et que, dans l'état sorti du cylindre pneumatique (14), la surface de cylindre (24) du deuxième élément de serrage se situe entre les deux surfaces de cylindre (20) du premier élément de serrage.
  2. Pince de serrage selon la revendication 1, le premier élément de serrage (20) étant l'élément stationnaire et le deuxième élément de serrage (24) étant l'élément mobile.
  3. Pince de serrage selon la revendication 1 ou 2, le cylindre pneumatique (14) travaillant contre la force d'un ressort (26), de telle sorte que la pince de serrage soit ouverte à l'état normal.
  4. Pince de serrage selon la revendication 3, la pince de serrage présentent une commande, grâce à laquelle, en premier lieu, par apport de gaz sous pression, les deux éléments de serrage (20, 24) peuvent être déplacés l'un vers l'autre en vue de la fermeture de la pince de serrage et de la saisie du fil (F), en deuxième lieu, par interruption de l'apport de gaz sous pression, les deux éléments de serrage (20, 24) peuvent être déplacés par la force de ressort à l'écart l'un de l'autre, en vue de l'ouverture de la pince de serrage et de la libération du fil, et, en troisième lieu, la pression du gaz sous pression pouvant être ajustée de telle sorte que pour l'essentiel la force du ressort soit compensée et que les deux éléments de serrage (20, 24) pressent avec une force éventuellement faible contre un fil (F) disposé entre eux.
  5. Pince de serrage selon l'une quelconque des revendications 1 à 4, avec une tige (28) donnant une indication dans la direction de déplacement du piston (25), qui entoure de tous côtés, conjointement aux deux éléments de serrage (20, 24) et au corps de la pince de serrage (12), un fil (F) saisi.
EP02730046A 2001-03-23 2002-03-22 Pince de serrage pour machines a tisser a joint Expired - Lifetime EP1377701B8 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20105091U DE20105091U1 (de) 2001-03-23 2001-03-23 Spannzange für Nahtwebmaschinen
DE20105091U 2001-03-23
PCT/EP2002/003234 WO2002077341A1 (fr) 2001-03-23 2002-03-22 Pince de serrage pour machines a tisser a joint

Publications (3)

Publication Number Publication Date
EP1377701A1 EP1377701A1 (fr) 2004-01-07
EP1377701B1 true EP1377701B1 (fr) 2007-07-18
EP1377701B8 EP1377701B8 (fr) 2007-10-31

Family

ID=7954750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02730046A Expired - Lifetime EP1377701B8 (fr) 2001-03-23 2002-03-22 Pince de serrage pour machines a tisser a joint

Country Status (5)

Country Link
US (1) US6948531B2 (fr)
EP (1) EP1377701B8 (fr)
AT (1) ATE367465T1 (fr)
DE (2) DE20105091U1 (fr)
WO (1) WO2002077341A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2440696B1 (fr) 2009-06-10 2016-01-06 Picanol Unité préhensile, système de commande pour unité préhensile, et métier à tisser

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1016052A3 (nl) * 2004-05-19 2006-02-07 Wiele Michel Van De Nv Pneumatische stuurbare inslagdraadklem voor een weefmachine.
DE202005018856U1 (de) * 2005-12-01 2007-04-12 Wangner Gmbh & Co Kg Halterung für das Webblatt einer Nahtwebmaschine, um den Nahtschussfaden wahlweise mittels Schrägstellung der Riete oder verfahrbarer Rolle einzuwälzen

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT264407B (de) * 1964-03-10 1968-08-26 Elitex Zavody Textilniho Webstuhl mit mindestens einem Greiferschützen
CH634614A5 (de) * 1979-03-29 1983-02-15 Textilma Ag Schuetzenlose webmaschine.
DE3025909C2 (de) * 1980-07-09 1983-07-14 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Verfahren und Vorrichtung zum Herstellen einer Webnaht zwischen zwei Gewebeenden
DE8122449U1 (de) * 1981-07-30 1983-01-13 Fa. F. Oberdorfer, 7920 Heidenheim Vorrichtung zum verteilen der kettfadenenden waehrend der nahtbildung bei papiermachergeweben
ATE56490T1 (de) * 1986-02-22 1990-09-15 Asten Group Automatische maschine zum verbinden zweier enden eines bandes.
DE8713074U1 (fr) * 1987-07-27 1988-11-24 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen, De
DE9002278U1 (fr) * 1990-02-26 1991-07-25 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen, De
DE9211353U1 (de) * 1992-08-24 1994-01-05 Novatech Siebe & Tech Halterung für das Webblatt einer Nahtwebmaschine
DE9215498U1 (de) * 1992-11-13 1994-03-17 Novatech Siebe & Tech Durchziehgreifer zum Eintragen eines Hilfsschußfadens in das Nahtwebfach bei einer Nahtwebmaschine
DE9301722U1 (de) * 1993-02-08 1994-06-09 Novatech Siebe & Tech Nahtwebmaschine mit Fransenfänger
US5390708A (en) * 1993-09-21 1995-02-21 Asten Group, Inc. Apparatus for translating yarns in the proper position and orientation for forming a woven join
DE19505280C2 (de) * 1995-02-16 1998-08-06 Staeubli Gmbh Verfahren und Vorrichtung zur maschinellen Herstellung einer Naht zum Endlosmachen einer Gewebebahn
AT403700B (de) * 1996-11-22 1998-04-27 Wis Engineering Gmbh Greiferkopf für einen faden, insbesondere für eine nahtwebmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2440696B1 (fr) 2009-06-10 2016-01-06 Picanol Unité préhensile, système de commande pour unité préhensile, et métier à tisser
EP2440696B2 (fr) † 2009-06-10 2018-12-26 Picanol Unité préhensile, système de commande pour unité préhensile, et métier à tisser

Also Published As

Publication number Publication date
ATE367465T1 (de) 2007-08-15
WO2002077341A1 (fr) 2002-10-03
US20040154678A1 (en) 2004-08-12
US6948531B2 (en) 2005-09-27
EP1377701A1 (fr) 2004-01-07
EP1377701B8 (fr) 2007-10-31
DE20105091U1 (de) 2002-09-05
DE50210506D1 (de) 2007-08-30

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