EP0394749B1 - Zubringergreifer mit axialem Schieber für schützenlose Webmaschinen - Google Patents

Zubringergreifer mit axialem Schieber für schützenlose Webmaschinen Download PDF

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Publication number
EP0394749B1
EP0394749B1 EP90106873A EP90106873A EP0394749B1 EP 0394749 B1 EP0394749 B1 EP 0394749B1 EP 90106873 A EP90106873 A EP 90106873A EP 90106873 A EP90106873 A EP 90106873A EP 0394749 B1 EP0394749 B1 EP 0394749B1
Authority
EP
European Patent Office
Prior art keywords
gripper
slider
clamping element
weft
clamping
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
EP90106873A
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English (en)
French (fr)
Other versions
EP0394749A1 (de
Inventor
Ettore Viscardi
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.)
Promatech SpA
Original Assignee
SOMET Societa Meccanica Tessile SpA
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Filing date
Publication date
Application filed by SOMET Societa Meccanica Tessile SpA filed Critical SOMET Societa Meccanica Tessile SpA
Priority to AT90106873T priority Critical patent/ATE94920T1/de
Publication of EP0394749A1 publication Critical patent/EP0394749A1/de
Application granted granted Critical
Publication of EP0394749B1 publication Critical patent/EP0394749B1/de
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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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers
    • D03D47/233—Carrying grippers

Definitions

  • the present invention concerns a weft yarn carrying gripper for shuttleless looms.
  • grippers are those members in shuttleless looms by means of which the weft yarns are seized at one end of the loom and carried to the opposite end thereof through the warp shed.
  • the carrying gripper seizes the weft yarn from a weft feeding device and carries it to the centre of the shed, while the drawing gripper receives the weft yarn from the carrying gripper, at the centre of the shed, and draws it to the opposite end of the loom.
  • FR-A-2.113.237 which provides a suction device acting in correspondence of the only point where it is possible to clean the gripper when at rest, namely next to the weft feeder where the yarn starts its path along the loom shed.
  • FR-A-2.113.237 in this position the carrying gripper is temporarily kept open and said device acts by sucking and thus removing any dirt and fibres collected on the gripper.
  • the gripper used herein is of the type essentially differing from that described in IT-B-1.095.254: it is in fact formed of a first fixed and essentially stiff jaw and of a second jaw, equally stiff and hinged on the first.
  • a spring acting onto an extension arm of the second jaw, keeps this latter normally rotated in a closed position.
  • an opening device acts on said extension arm, in opposition to said spring, in order to rotate the second jaw in the open position.
  • a gripper of this type is however not equally efficient as that described in IT-B-1.095.254, for what concerns the main function which it is required to perform, namely the reliable seizing and carrying of the weft yarn.
  • said contact plane forms instead a very narrow angle in respect of said longitudinal axis, so that - in order to anyhow obtain a fast removal of the slider head from the counteracting surface - the slider is provided to simultaneously perform a longitudinal and a transversal movement, this latter being produced by a suitable wedge surface.
  • the object of the present invention is hence to realize a carrying gripper of the type described in IT-B-1.095.254, that is, of the type wherein the two jaws consist of two parallel, adjacent, longitudinally extending elements - one of them being in the form of a leaf spring - apt to be opened under control and thus suited for a cleaning operation, for instance of the type described in FR-A-2.113.237.
  • a carrying gripper for shuttleless looms - of the type comprising clamping means in the form of a pair of longitudinally extending elements in reciprocal contact, a first clamping element consisting of a stiff bar and a second clamping element being in the form of a leaf spring apt to impart a contact pressure on said first element along a plane substantially parallel to the gripper axis - characterized in that, said first clamping element is mounted on a slider and is movable therewith longitudinally in respect of the gripper body, and said second clamping element is fixedly mounted on the gripper body, and in that, a first fixed block is connected to said gripper body and has a surface cooperating with said slider to press the first clamping element close to the second clamping element during the forward motion of the slider; and a second fixed block is connected to said gripper body and has a surface cooperating with said slider to draw the first clamping element apart from the second clamping element during the backward motion of the slider.
  • the gripper comprises a gripper body P, onto which is mounted a needle or slider 2, sliding longitudinally in respect of the gripper body and constantly pushed in the direction A by a spring 1.
  • the slider 2 At its end positioned on the side of the tip P' of the gripper P, the slider 2 carries a first longitudinally extending clamping element 4, essentially consisting of a stiff bar having the configuration of a ski.
  • the stiff element 4 is connected to the slider 2 through an inclined tooth 3.
  • the slider 2 is guided through passages formed in two support blocks 5 and 6, fixedly connected to the gripper body P.
  • the passage inside the block 5 is straight and guides the slider 2 with precision; whereas the passage inside the block 6 extends also vertically and has an upper surface in the form of an inclined plane 6', with which is meant to cooperate the inclined tooth 3, as better described hereinafter.
  • the slider 2 In an intermediate position between the tooth 3 and the spring 1, the slider 2 is moreover provided with a pawl 2a extending downward against a second inclined plane 7, also fixedly connected to the gripper body P and specularly opposed to the inclined plane 6', the function of which is also better described hereinafter.
  • a similar clamping element 8 consisting of a leaf spring of shape specularly symmetrical to the element 4.
  • the clamping element 8 is fitted with its inner end 8a into a fixed part of the gripper body P.
  • the slider 2 is connected by way of a clamp 9 to an end of a flexible pulling strap 10, the other end of which is fixed onto an operating lever 11.
  • the gripper in weft yarn gripping and carrying conditions, the gripper is in the position shown in figure 1, wherein the spring 1 pushes the slider 2 in the direction A. Thanks to the cooperation between the inclined tooth 3 and the fixed inclined plane 6', the pressure of the spring 1 turns into a downward pressure of the free end of the slider 2 and thus determines the contact pressure of the clamping element 4 onto the clamping element 8.
  • cleaning means act by creating an air stream through said two elements, apt to suck and remove the dust and/or any fibre residues found therein.

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

Claims (10)

  1. Wirbelstrombremse, umfassend einen zylindrischen Rahmen (5) aus unmagnetischen Material mit einem inneren Zwischenraum rechteckigen Querschnitts, der zwischen einem Paar Bremsscheiben (3) angeordnet ist, welche mit einer rotierenden Welle (2) verbunden sind, eine Anzahl ferromagnetischer Platten (6), die mit gleichen Umfangsintervallen an beiden Seitenwänden des Rahmens (5) befestigt sind und eine Anzahl von Permanentmagneten (12), die auf einem Magnettragering (8) angeordnet sind, welcher im inneren Zwischenraum des Rahmens (5) gehalten ist, wobei der Rahmen (5) ortsfest und der Ring (8) drehbar ist oder umgekehrt, dadurch gekennzeichnet, daß jeder ferromagnetischen Platte (6) zwei Magneten (12) gegenüberliegen und daß jeder Magnet (12) neben einem Magneten (12) gleicher Polarität und neben einem Magneten (12) entgegengesetzter Polarität liegt.
  2. Wirbelstrombremse nach Anspruch 1, dadurch gekennzeichnet, daß der besagte Rahmen (5) ortsfest und der besagte Magnettragering (8) drehbar ist.
  3. Wirbelstrombremse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der besagte Magnettragering (8) aus unmagnetischem Material ist.
  4. Wirbelstrombremse nach Anspruch 3, dadurch gekennzeichnet, daß das besagte unmagnetische Material Aluminium ist.
  5. Wirbelstrombremse nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die besagten Permanentmagneten (12) in den Magnettragering (8) eingegossen sind.
  6. Wirbelstrombremse nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß die besagten ferromagnetischen Platten (6) in die Seitenwände des ortsfesten Rahmens (5) eingelassen werden, wenn der besagte ortsfeste Rahmen (5) gegossen wird.
  7. Wirbelstrombremse nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß ein Paar dünner Schiebeplatten (14) in verschieblicher Berührung zwischen den beiden Seitenwänden des Magnettragerings (8) und der ferromagnetischen Platte (6) liegen.
  8. Wirbelstrombremse nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, daß der Magnettragering (8) um den Anordnungswinkel (p) der Permanentmagneten (12) mittels eines Elektromotors (16) hin- und herdrehbar ist.
  9. Wirbelstrombremse nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, daß der besagte Magnettragering (8) mittels einer Fluiddruckbetätigung verdreht wird.
  10. Wirbelstrombremse nach Anspruch 1, dadurch gekennzeichnet, daß der besagte Magnettragering (8) ortsfest und der besagte Rahmen (5) drehbar ist.
EP90106873A 1989-04-21 1990-04-10 Zubringergreifer mit axialem Schieber für schützenlose Webmaschinen Expired - Lifetime EP0394749B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90106873T ATE94920T1 (de) 1989-04-21 1990-04-10 Zubringergreifer mit axialem schieber fuer schuetzenlose webmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8920233A IT1230000B (it) 1989-04-21 1989-04-21 Pinza portatrama a cursore mobile assialmente, per telai di tessitura senza navetta.
IT2023389 1989-04-21

Publications (2)

Publication Number Publication Date
EP0394749A1 EP0394749A1 (de) 1990-10-31
EP0394749B1 true EP0394749B1 (de) 1993-09-22

Family

ID=11164990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90106873A Expired - Lifetime EP0394749B1 (de) 1989-04-21 1990-04-10 Zubringergreifer mit axialem Schieber für schützenlose Webmaschinen

Country Status (5)

Country Link
EP (1) EP0394749B1 (de)
AT (1) ATE94920T1 (de)
DE (1) DE69003433T2 (de)
ES (1) ES2045619T3 (de)
IT (1) IT1230000B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1261319B (it) * 1993-10-27 1996-05-14 Interpatents Ltd Pinza portatrama per macchine per tessere.
IT230496Y1 (it) * 1993-11-16 1999-06-07 Ivo Moia Coppia di pinze positive portanti e traenti per telai di tessitura
EP3512991B1 (de) * 2016-09-14 2024-01-17 Kurkute, Sanjay Schussfadengreifmechanismus für schiffchenlose webmaschinen
CN107313159B (zh) * 2017-07-28 2019-03-08 阳信瑞鑫集团有限公司 一种织布机接纬剑

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2421970A1 (fr) * 1978-04-07 1979-11-02 Tessile Mecc Spa Pince porteuse pour metiers a tisser a alimentation continue de la trame

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH514707A (de) * 1970-10-27 1971-10-31 Fischer Ag Brugg Georg Vorrichtung zum Absaugen von Faserresten und Staubteilchen an Schussfadeneintragsorganen an Webmaschinen
JPS5063263A (de) * 1973-04-07 1975-05-29
IT1132844B (it) * 1980-09-15 1986-07-09 Nuovo Pignone Spa Perfezionamenti nelle pinze passatrama per telai tessili
EP0123005B1 (de) * 1983-04-18 1986-09-17 Maschinenfabrik Sulzer-Rüti Ag Greifer für den Schussfadeneintrag bei einer Greiferwebmaschine
CH669220A5 (de) * 1986-02-13 1989-02-28 Sulzer Ag Greifer fuer den schussfadeneintrag bei einer greiferwebmaschine.
FR2606040B1 (fr) * 1986-10-31 1988-12-02 Materiel Textile Ste Alsacienn Dispositif pour l'insertion des fils de trame sur les metiers a tisser sans navette

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2421970A1 (fr) * 1978-04-07 1979-11-02 Tessile Mecc Spa Pince porteuse pour metiers a tisser a alimentation continue de la trame

Also Published As

Publication number Publication date
ES2045619T3 (es) 1994-01-16
ATE94920T1 (de) 1993-10-15
EP0394749A1 (de) 1990-10-31
IT1230000B (it) 1991-09-20
DE69003433T2 (de) 1994-01-20
DE69003433D1 (de) 1993-10-28
IT8920233A0 (it) 1989-04-21

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