EP0461524A1 - Schussfadenzubringvorrichtung für Greiferwebmaschinen - Google Patents

Schussfadenzubringvorrichtung für Greiferwebmaschinen Download PDF

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Publication number
EP0461524A1
EP0461524A1 EP91109116A EP91109116A EP0461524A1 EP 0461524 A1 EP0461524 A1 EP 0461524A1 EP 91109116 A EP91109116 A EP 91109116A EP 91109116 A EP91109116 A EP 91109116A EP 0461524 A1 EP0461524 A1 EP 0461524A1
Authority
EP
European Patent Office
Prior art keywords
presenting
weft
rods
gripper
yarn
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
EP91109116A
Other languages
English (en)
French (fr)
Other versions
EP0461524B2 (de
EP0461524B1 (de
Inventor
Luigi Pezzoli
Rossano Maffeo
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.)
NUOVA VAMATEX S.P.A.
Original Assignee
NUOVA VAMATEX SpA
Vamatex SpA
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11169360&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0461524(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by NUOVA VAMATEX SpA, Vamatex SpA filed Critical NUOVA VAMATEX SpA
Publication of EP0461524A1 publication Critical patent/EP0461524A1/de
Application granted granted Critical
Publication of EP0461524B1 publication Critical patent/EP0461524B1/de
Publication of EP0461524B2 publication Critical patent/EP0461524B2/de
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
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/38—Weft pattern mechanisms

Definitions

  • the present invention concerns a weft yarn presenting device for gripper looms.
  • one or more weft yarns are inserted by a pair of grippers with alternate motion, cooperating at the centre of the shed, into the sequence of the warp yarns forming said shed.
  • Such devices substantially comprise one or more rods having an eyelet into which passes a respective weft yarn to be presented. When one of said eyelets moves, it shifts the respective weft yarn from a rest position far from the gripper trajectory, to another position (called presenting position) wherein the weft yarn can be gripped by the carrying gripper and conveyed towards and into the warp shed.
  • weft control ends when the gripper moves out of the warp shed and the selection step requires a certain time for the yarn to be hooked, which depends on the force of the electromagnet and/or on the masses of the mechanical hooking elements having to be shifted.
  • said time corresponds to wider rotation angles of the loom for the selection step, hence to the detriment of the angles utilizable for the presenting step, the reduction of which leads to an increase in the mechanical stresses, in the wears and in the vibrations of the presenting device.
  • one is forced to anticipate the start of the selection step before the outlet of the gripper from the warp shed - which outlet determines the final time within which weft control can take place - rather than reducing the times for the presenting step.
  • the mechanical presenting devices require furthermore a motion transmission obtained with a mechanical drive by means of belts, chains or gears, which cause problems of alignment on assembly, require maintenance and limit the choice of the most suitable positioning on the loom for a proper weaving operation.
  • Said device is of the type comprising a plurality of presenting rods having a yarn guiding eyelet, which converge towards the zone in which the weft yarn has to be gripped by the loom carrying gripper and which are each controlled by a flexible cable sliding into a sheath, and is characterized in that each of the flexible cables controlling said rods is operated by a linear electric motor.
  • the linear electric motor can operate the corresponding flexible cable either directly, by acting along the main axis of said cable and/or of the rod controlled by the same in order to produce short alternate rectilinear movements thereof, or through a rotary lever caused to perform short angular back and forth movements.
  • the rods of the device are moreover guided into a stiff guide, in respect of which they are preferably prevented from rotating.
  • each linear electric motor of the device there are associated electronic control means, preferably comprising a microprocessor, apt to constantly detect the position of the presenting rod operated by said motor and to govern the motor according to said position, to the working of the loom and to the physical/textile features of the yarn being woven.
  • electronic control means preferably comprising a microprocessor, apt to constantly detect the position of the presenting rod operated by said motor and to govern the motor according to said position, to the working of the loom and to the physical/textile features of the yarn being woven.
  • each of the presenting rods can act so as to regulate the tension of the weft yarn moved by the same.
  • the device according to the invention comprises - in known manner - a plurality of presenting rods 1, ending with an eyelet 2 for the weft yarn f and each controlled by a flexible cable 3 sliding into a sheath 4.
  • Figure 1 shows, by way of example, a device with eight rods 1, of which only one can be seen in figure 2. Also in known manner the rods 1, which are slidably guided into stiff guides 5 wherein their rotation is prevented, converge into the zone P where the weft yarn has to be gripped by the loom carrying gripper to be drawn into the shed.
  • the most suitable position of the guides 5, and thus of the rods 1 - for an efficient presenting of the various weft yarns - is obtained by acting on adjustable supports 6.
  • each of the flexible cables 3 controlling the rods 1 is operated by a linear electric motor.
  • the linear electric motors 7 are positioned radially, each aligned on the common axis of the rod 1, of the flexible cable 3 and of the corresponding guide 5 and sheath 4. These motors act directly on the flexible cables 3, causing short rectilinear alternate movements thereof, of adjustable amplitude. Equal movements are thus imparted on the rods 1.
  • the linear electric motors 8 are positioned in block and they operate the flexible cables 3 each through a rotating lever 9, to which the cable 3 is anchored in 10 and which is caused to perform, by the respective motor 8, short angular back and forth movements of adjustable amplitude (to which correspond short rectilinear alternate movements, of adjustable amplitude, of the rods 1).
  • linear electric motors used are of the conventional type and are hence not described in detail; it should simply be remembered that they allow to perform very precise movements, even if of limited amplitude, and to carry out a very precise adjustment of the operating times, of the working speeds, of the length and amplitude of the movements.
  • the presenting device is completed by electronic control meanspreferably comprising a microprocessor - which also require no particular description as they are of conventional type. These means, shown by 11 in figure 2, are connected to the electronic control system 12 of the loomto which the presenting device of the invention is applied - and to the linear electric motors 7 or 8, so as to allow constantly detecting, by way of a position sensor 13, the position taken up by the corresponding presenting rods 1.
  • the control system can therefore detect the tension of the weft yarn being inserted by the gripper into the warp shed, by measuring the feed current required by the bobbin to balance the force resulting on the eyelet 2. It ensues that the rod 1 in a presenting position can also act - see figure 4 - as tension regulator during insertion, in that, according to the position of the eyelet 2 at the end of the presenting rod 1, in respect of fixed yarnguidzs 14, 15, weft yarn tension (T) varies to a certain extent during insertion. In fact, the more the eyelet 2 moves down in respect of the yarnguides 14, 15, the wider the winding angles of the weft yarn around said yarnguides.
  • the device according to the invention requires no mechanical motion transmissions and can thus be associated to the loom in the most functional area, for instance in a position high above the presenting area, so as not to hamper the intervention of the weaver and the insertion of the wefts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Surgical Instruments (AREA)
  • Endoscopes (AREA)
EP91109116A 1990-06-11 1991-06-04 Schussfadenzubringvorrichtung für Greiferwebmaschinen Expired - Lifetime EP0461524B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT02059890A IT1248715B (it) 1990-06-11 1990-06-11 Dispositivo di presentazione della trama per telai di tessitura a pinze
IT2059890 1990-06-11

Publications (3)

Publication Number Publication Date
EP0461524A1 true EP0461524A1 (de) 1991-12-18
EP0461524B1 EP0461524B1 (de) 1995-02-22
EP0461524B2 EP0461524B2 (de) 1999-03-10

Family

ID=11169360

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91109116A Expired - Lifetime EP0461524B2 (de) 1990-06-11 1991-06-04 Schussfadenzubringvorrichtung für Greiferwebmaschinen

Country Status (8)

Country Link
EP (1) EP0461524B2 (de)
AT (1) ATE118831T1 (de)
DE (1) DE69107517T3 (de)
DK (1) DK0461524T3 (de)
ES (1) ES2069120T5 (de)
GR (1) GR3015932T3 (de)
HK (1) HK46396A (de)
IT (1) IT1248715B (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0598264A1 (de) 1992-11-16 1994-05-25 Picanol N.V. Vorrichtung zum Auswählen und Zustellen von Schussfäden für eine Webmaschine
EP0638677A1 (de) * 1993-08-02 1995-02-15 Lindauer Dornier Gesellschaft M.B.H Vorrichtung zum Zuführen von Schussfäden zu einem Schussfadeneintragorgan in Webmaschinen
EP0676493A1 (de) * 1994-04-05 1995-10-11 PANTER S.r.l. Schussfadenhinreichevorrichtung für Webmaschinen
DE29713979U1 (de) * 1997-07-04 1997-10-16 Textilma Ag Kettenwirkmaschine, insbesondere Häkelgalonmaschine
EP0894882A2 (de) * 1997-07-30 1999-02-03 NUOVO PIGNONE S.p.A. Schussfadenwähler für schütsenlose Webmaschinen
EP0894883A2 (de) * 1997-07-30 1999-02-03 NUOVO PIGNONE S.p.A. Modulare Vorrichtung zum Schussfadenzubring für schütsenlose Webmaschinen
EP1024214A1 (de) * 1999-01-28 2000-08-02 Sulzer Textil Ag Vorrichtung und Anordnung zum Vorlegen eines Schussfadens für eine Greiferwebmaschine
JP2001098443A (ja) * 1999-09-23 2001-04-10 Sulzer Textil Ag 複数の異なる緯糸用の挿入システムを備えた織機
US6230760B1 (en) 1999-01-28 2001-05-15 Sulzer Textil Ag Linear motor weft presenting apparatus
EP1099784A1 (de) 1999-09-23 2001-05-16 Sulzer Textil AG Webmaschine mit einem Eintragungssystem für eine Mehrzahl von in der Regel unterschiedlicher Schussfäden
EP1353000A1 (de) * 2002-04-10 2003-10-15 Lin, Chen-Hui Schussfadenwähler für eine Bandwebmaschine
EP1500731A1 (de) * 2003-07-10 2005-01-26 Promatech S.p.A. Schussfadenzubringvorrichtung für Webmaschinen mit einer einzigen Zubringstange
EP1777327A1 (de) * 2005-10-20 2007-04-25 Luigi Omodeo Zorini Nadelwebmaschine mit automatischem Schussfadenwechsel
ITUB20160421A1 (it) * 2016-02-01 2016-05-01 Rinaldo Sperotto PRESENTATRICE ROTATIVA per macchine da tessere a preselezione meccanica e comando elettronico

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH418248A (de) * 1964-10-26 1966-07-31 Scheffel Walter Farbenwechselapparat für schützenlose Webmaschinen
CH450315A (de) * 1967-05-09 1968-01-15 Rueti Ag Maschf Anordnung zum wahlweisen Zubringen von Schussfäden verschiedener Art an eine Fadenübernahmestelle
US3780775A (en) * 1972-08-25 1973-12-25 Rockwell International Corp Weft control mechanism for shuttleless looms
EP0077309A2 (de) * 1981-06-10 1983-04-20 Tsudakoma Kogyo Kabushiki Kaisha Schussfadenauswahlvorrichtung bei Webmaschinen
EP0123772A1 (de) * 1983-04-27 1984-11-07 Emil Jäger GmbH & Co. KG Vorrichtung zum Eintragen von Schussfäden bei Webmaschinen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH418248A (de) * 1964-10-26 1966-07-31 Scheffel Walter Farbenwechselapparat für schützenlose Webmaschinen
CH450315A (de) * 1967-05-09 1968-01-15 Rueti Ag Maschf Anordnung zum wahlweisen Zubringen von Schussfäden verschiedener Art an eine Fadenübernahmestelle
US3780775A (en) * 1972-08-25 1973-12-25 Rockwell International Corp Weft control mechanism for shuttleless looms
EP0077309A2 (de) * 1981-06-10 1983-04-20 Tsudakoma Kogyo Kabushiki Kaisha Schussfadenauswahlvorrichtung bei Webmaschinen
EP0123772A1 (de) * 1983-04-27 1984-11-07 Emil Jäger GmbH & Co. KG Vorrichtung zum Eintragen von Schussfäden bei Webmaschinen

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0598264A1 (de) 1992-11-16 1994-05-25 Picanol N.V. Vorrichtung zum Auswählen und Zustellen von Schussfäden für eine Webmaschine
EP0763613A2 (de) 1992-11-16 1997-03-19 Picanol N.V. Vorrichtung zum Auswählen und Zustellen von Schussfäden für eine Webmaschine
EP0763613A3 (de) * 1992-11-16 1997-10-01 Picanol Nv Vorrichtung zum Auswählen und Zustellen von Schussfäden für eine Webmaschine
EP0638677A1 (de) * 1993-08-02 1995-02-15 Lindauer Dornier Gesellschaft M.B.H Vorrichtung zum Zuführen von Schussfäden zu einem Schussfadeneintragorgan in Webmaschinen
EP0676493A1 (de) * 1994-04-05 1995-10-11 PANTER S.r.l. Schussfadenhinreichevorrichtung für Webmaschinen
DE29713979U1 (de) * 1997-07-04 1997-10-16 Textilma Ag Kettenwirkmaschine, insbesondere Häkelgalonmaschine
US6182476B1 (en) 1997-07-04 2001-02-06 Textilma Ag Warp knitting loom, in particular crochet galloon machine
US6006795A (en) * 1997-07-30 1999-12-28 Corain; Luciano Linear motor selector device for weft yarn presentation in shuttleless looms
EP0894882A3 (de) * 1997-07-30 1999-06-02 NUOVO PIGNONE S.p.A. Schussfadenwähler für schütsenlose Webmaschinen
EP0894883A2 (de) * 1997-07-30 1999-02-03 NUOVO PIGNONE S.p.A. Modulare Vorrichtung zum Schussfadenzubring für schütsenlose Webmaschinen
US6026864A (en) * 1997-07-30 2000-02-22 Corain; Luciano Modular device for weft yarn presentation in shuttleless looms
EP0894882A2 (de) * 1997-07-30 1999-02-03 NUOVO PIGNONE S.p.A. Schussfadenwähler für schütsenlose Webmaschinen
EP0894883A3 (de) * 1997-07-30 1999-06-02 NUOVO PIGNONE S.p.A. Modulare Vorrichtung zum Schussfadenzubring für schütsenlose Webmaschinen
US6230760B1 (en) 1999-01-28 2001-05-15 Sulzer Textil Ag Linear motor weft presenting apparatus
EP1024214A1 (de) * 1999-01-28 2000-08-02 Sulzer Textil Ag Vorrichtung und Anordnung zum Vorlegen eines Schussfadens für eine Greiferwebmaschine
JP2001098443A (ja) * 1999-09-23 2001-04-10 Sulzer Textil Ag 複数の異なる緯糸用の挿入システムを備えた織機
EP1099784A1 (de) 1999-09-23 2001-05-16 Sulzer Textil AG Webmaschine mit einem Eintragungssystem für eine Mehrzahl von in der Regel unterschiedlicher Schussfäden
US6305435B1 (en) 1999-09-23 2001-10-23 Sulzer Textil Ag Weaving machine with an insertion system for a plurality of generally different weft threads
EP1353000A1 (de) * 2002-04-10 2003-10-15 Lin, Chen-Hui Schussfadenwähler für eine Bandwebmaschine
EP1500731A1 (de) * 2003-07-10 2005-01-26 Promatech S.p.A. Schussfadenzubringvorrichtung für Webmaschinen mit einer einzigen Zubringstange
EP1777327A1 (de) * 2005-10-20 2007-04-25 Luigi Omodeo Zorini Nadelwebmaschine mit automatischem Schussfadenwechsel
US7441567B2 (en) 2005-10-20 2008-10-28 Luigi Omodeo Zorini Needle loom with automatic change of the weft thread
ITUB20160421A1 (it) * 2016-02-01 2016-05-01 Rinaldo Sperotto PRESENTATRICE ROTATIVA per macchine da tessere a preselezione meccanica e comando elettronico

Also Published As

Publication number Publication date
DE69107517T2 (de) 1995-08-10
DE69107517T3 (de) 2000-08-10
ES2069120T5 (es) 1999-08-01
GR3015932T3 (en) 1995-07-31
DK0461524T3 (da) 1995-07-24
ES2069120T3 (es) 1995-05-01
IT1248715B (it) 1995-01-26
ATE118831T1 (de) 1995-03-15
DE69107517D1 (de) 1995-03-30
HK46396A (en) 1996-03-22
EP0461524B2 (de) 1999-03-10
IT9020598A1 (it) 1991-12-11
EP0461524B1 (de) 1995-02-22
IT9020598A0 (de) 1990-06-11

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