EP1377701A1 - Pince de serrage pour machines a tisser a joint - Google Patents

Pince de serrage pour machines a tisser a joint

Info

Publication number
EP1377701A1
EP1377701A1 EP02730046A EP02730046A EP1377701A1 EP 1377701 A1 EP1377701 A1 EP 1377701A1 EP 02730046 A EP02730046 A EP 02730046A EP 02730046 A EP02730046 A EP 02730046A EP 1377701 A1 EP1377701 A1 EP 1377701A1
Authority
EP
European Patent Office
Prior art keywords
collet
thread
pneumatic cylinder
clamping element
cylinder
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
EP02730046A
Other languages
German (de)
English (en)
Other versions
EP1377701B8 (fr
EP1377701B1 (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 Finckh GmbH and Co KG
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 Finckh GmbH and Co KG filed Critical Wangner Finckh GmbH and Co KG
Publication of EP1377701A1 publication Critical patent/EP1377701A1/fr
Application granted granted Critical
Publication of EP1377701B1 publication Critical patent/EP1377701B1/fr
Publication of EP1377701B8 publication Critical patent/EP1377701B8/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
    • 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 grasping a thread.
  • the collet is arranged at the tip of a movable gripper arm of a pull-through gripper, which is used to insert 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 components.
  • the drainage screens consist of
  • the drainage screens are then cut apart again and sewn into an endless screen cloth in a final process step using a woven seam.
  • the woven seam is an extremely sensitive and time-consuming step in the manufacturing process of a drainage screen. In order to improve this time-consuming work process, weaving machines or automatic machines have been developed.
  • warp threads of a length of, for example, 15 cm are exposed at the ends of the fabric to be connected by removing the weft threads in this area.
  • the so-called woven seam in which the original weave is exactly restored, is then formed from the warp thread fringes and the weft threads removed from the fabric end.
  • an auxiliary weaving shed or seam weaving shed is stretched out of the removed weft threads, in which the removed weft threads act as auxiliary warp threads.
  • the warp thread fringes are inserted as auxiliary weft threads from the two fabric ends.
  • a warp thread fringe is detached and held in place by a separator (DE-U-87 13 074, EP-A-0 301 174 and DE-U-90 02 278) from the large number of warp thread fringes projecting from each end of the fabric.
  • a transfer rapier transports this warp thread fringe to a pull-through rapier, which then enters it as an auxiliary weft thread in the seam weaving compartment, in such a way that the auxiliary weft thread initially lies taut in the seam weaving compartment.
  • the pull-through gripper is of the type mentioned at the beginning and is e.g. known from DE-U-81 22 449, EP-A-0 043 441 and EP-A-0 236 601. The pulling gripper no longer checks for the presence of the warp thread fringe.
  • the auxiliary weft thread must be held with different tensions by the collet integrated in the pull-through hook.
  • the auxiliary weft thread is tensioned with a corresponding pressure, generated by the pneumatic cylinder, between a flat tension surface on the collet body and a flat surface on the pressure piece which are parallel to one another.
  • the invention has for its object to provide a collet that can be controlled so that it holds the thread securely on the one hand 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 metered reproducibly ,
  • this object is achieved in that the first clamping element has two spaced cylindrical surfaces and in that the second clamping element has a cylindrical surface, the arrangement of the cylindrical surfaces being such that the axes of the cylindrical surfaces are parallel to one another and substantially perpendicular to the axis of the pneumatic cylinder and that in the extended state of the pneumatic cylinder, the cylinder surface of the second clamping element lies between the two cylinder surfaces of the first clamping element.
  • An advantage of the collet according to the invention is that it is largely insensitive to contamination.
  • the gripping force is only slightly influenced by adhering dirt.
  • Figure 1 shows the collet in a spatial representation.
  • Figure 2 shows the collet from above in the closed position.
  • Figure 3 shows the collet in the position with reduced gas pressure in the pneumatic cylinder (power scale).
  • Fig. 4 shows the collet in a spatial representation in a partially closed position, but without
  • Fig. 5 the collet in section.
  • the collet 10 is cylindrical overall and is composed of a clamping body 12 and a pneumatic cylinder 14, which are connected by means of an adapter ring 16.
  • ⁇ ri cn ⁇ ⁇ • n to> 3 J Mi N P- S ⁇ cn PO to cn ON ri ö P 1 > NN -J i 2 ö c OJ P- P- p- P- 3 SD ⁇ s * 3 ⁇ P- P- rr 3 o 0 SD ⁇ P- ⁇ *> 3 ⁇ ⁇ 3 o ⁇ £ D ⁇
  • the auxiliary warp threads Since the shed is formed from auxiliary warp threads, that is to say from threads which have been detached from the fabric to be made endless, the auxiliary warp threads also have a waveform permanently applied by the heat setting. For the stability and reliability of the woven seam, it is essential that the waveforms of the auxiliary weft threads and the auxiliary warp threads fit into one another in accordance with the weave repeat. This creates a positive connection that guarantees a very high strength of the woven seam. So that the wave troughs and peaks of the auxiliary weft threads and the auxiliary warp threads can fit into one another in accordance with the fabric repeat, a very high tension must be applied to the auxiliary weft threads after pulling them through the shed. This high tension is generated by the pulling gripper, for which purpose the auxiliary weft thread F must be clamped as tightly as possible in the collet 10.
  • the auxiliary weft thread F After the auxiliary weft thread F has been drawn into the shed and a high tensile stress has built up in the auxiliary weft thread F, the auxiliary weft thread is rolled in by means of the sley. In order to ensure the interlocking interlocking of the troughs and peaks of the auxiliary weft thread between the auxiliary warp threads, the auxiliary weft thread is not cast over the entire width of the shed at the same time, but successively over the width of the shed starting from the end of the fabric to which it is attached as a warp fringe. This process is called "rolling in". For the positive interlocking of the waveform of the auxiliary weft threads and the auxiliary warp threads, the auxiliary weft thread must be able to shorten its length during the rolling in. Before rolling in, the pressure in the
  • the pressure piece 22 with the further cylinder body 24 is slightly moved back by the thread F, which relaxes elastically in the direction of its diameter after the reduction of the gas pressure in the pneumatic cylinder 14, as can be seen in FIG. 3.
  • the pressure piece 22 floats, ie it exerts a force neither in one direction nor in the other and is applied to the thread F without pressure.
  • the auxiliary weft thread F is therefore held only by the wrap friction in the collet 10, while it is rolled in by the sley along the selvedge.

Landscapes

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

Abstract

La présente invention concerne une pince de serrage (10) permettant de saisir un fil lors de la production d'un joint de tissage. Cette pince de serrage se trouve à l'extrémité d'un système de passage et présente un premier élément de serrage et un second élément de serrage. Le premier et le second éléments de serrage (20, 24) peuvent être serrés l'un contre l'autre au moyen d'un cylindre pneumatique, afin de saisir le fil. Le premier élément de serrage présente deux surfaces cylindriques (20) éloignées l'une de l'autre et le second élément de serrage présente une surface cylindrique (24). Les surfaces cylindriques (20, 24) sont disposées de façon que leurs axes soient parallèles l'un par rapport à l'autre et sensiblement perpendiculaires par rapport à l'axe du cylindre pneumatique et de façon que, lorsque le cylindre pneumatique est déployé, la surface cylindrique (24) du second élément de serrage se trouve entre les deux surfaces cylindriques (20) du premier élément de serrage.
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 2001-03-23
DE20105091U DE20105091U1 (de) 2001-03-23 2001-03-23 Spannzange für Nahtwebmaschinen
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 true EP1377701A1 (fr) 2004-01-07
EP1377701B1 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)

Families Citing this family (3)

* 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
BE1018774A3 (nl) 2009-06-10 2011-08-02 Picanol Nv Grijpereenheid, controlesysteem voor een grijpereenheid en weefmachine.

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
EP0236601B2 (fr) * 1986-02-22 1996-09-04 Asten Group Inc. Machine automatique pour la jonction de deux extrémités de bande
DE8713074U1 (de) * 1987-07-27 1988-11-24 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Separator zum Vereinzeln von in einer Aufreihung gehaltenen Fäden
DE9002278U1 (de) * 1990-02-26 1991-07-25 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Platine für einen Separator zum Erfassen und Vereinzeln von Fäden
DE9211353U1 (de) * 1992-08-24 1994-01-05 Novatech GmbH Siebe und Technologie für Papier, 72760 Reutlingen Halterung für das Webblatt einer Nahtwebmaschine
DE9215498U1 (de) * 1992-11-13 1994-03-17 Novatech GmbH Siebe und Technologie für Papier, 72760 Reutlingen Durchziehgreifer zum Eintragen eines Hilfsschußfadens in das Nahtwebfach bei einer Nahtwebmaschine
DE9301722U1 (de) * 1993-02-08 1994-06-09 Novatech GmbH Siebe und Technologie für Papier, 72760 Reutlingen 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02077341A1 *

Also Published As

Publication number Publication date
DE50210506D1 (de) 2007-08-30
EP1377701B8 (fr) 2007-10-31
ATE367465T1 (de) 2007-08-15
US6948531B2 (en) 2005-09-27
WO2002077341A1 (fr) 2002-10-03
DE20105091U1 (de) 2002-09-05
US20040154678A1 (en) 2004-08-12
EP1377701B1 (fr) 2007-07-18

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