EP0394749A1 - Griffe porteuse avec coulisseau axial pour métiers sans navette - Google Patents

Griffe porteuse avec coulisseau axial pour métiers sans navette Download PDF

Info

Publication number
EP0394749A1
EP0394749A1 EP90106873A EP90106873A EP0394749A1 EP 0394749 A1 EP0394749 A1 EP 0394749A1 EP 90106873 A EP90106873 A EP 90106873A EP 90106873 A EP90106873 A EP 90106873A EP 0394749 A1 EP0394749 A1 EP 0394749A1
Authority
EP
European Patent Office
Prior art keywords
gripper
slider
clamping
clamping element
weft
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
EP90106873A
Other languages
German (de)
English (en)
Other versions
EP0394749B1 (fr
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
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 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/fr
Application granted granted Critical
Publication of EP0394749B1 publication Critical patent/EP0394749B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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.
  • An improved carrying gripper is that described for example in the IT-B-1.095.254 filed by the same Applicant, wherein the weft yarn is clamped between a pair of elements extending in the longitudinal sense of the gripper, one being stiff and the other in the form of a leaf spring.
  • the main advantage of this grip­per structure is provided: - on one hand, by the simplicity of the yarn clamping system which allows to seize the yarn fed from the weft feeder, without having to positively operate any member, but simply thanks to insertion of the weft yarn bet­ween said two extending elements, at least one of which is springing; and - on the other hand, by the fact that the yarn clamping force, determined by the pressure of the leaf spring element, keeps unaltered in time for a long period of use.
  • 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 coun­ teracting 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 consisting of a stiff bar is mounted on a slider and movable therewith longitudinally in respect of the gripper body, and said second clamping element in the form of a leaf spring is fixedly mounted on the gripper body, and in that, cam means are interpo­sed between said slider and said gripper body in order to produce a move­ment apt to draw the first stiff bar clamping element close to the second leaf spring clamping element - in response to the forward motion of the slider - up to imparting said contact pressure, and to draw said clamping elements apart - in response to the backward motion of the
  • the EP-A1-123.005 already discloses - as said - a drawing gripper combined with a slider performing a longitudinal and a transversal movement; nevertheless, this teaching cannot be directly ap­plied to the invention, mainly for the following reasons: - to start with, the fact that the object of EP-A1-123.005 is a drawing gripper, wherein it is widely known from previous technique to make use of an axially movable control slider, while the invention concerns a car­rying gripper, wherein this type of slider has never been adopted; - furthermore, the fact that in EP-A1-123.005 the contact plane between the two gripper jaws is inclined, so that the opening of the jaws is fundamentally determined by the longitudinal movement of the slider, while the transversal movement is used to speed up an already existing opening movement.
  • 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.
  • the main advantages provided by the device according to the in­vention are: - on one hand, the fact that the two clamping elements 4 and 8 are always kept perfectly clean, so that weft yarn gripping is always correct and reliable; - on the other hand, the fact that the pressure of one clamping element onto the other is determined by the action of the spring 1 in cooperation with the tooth 3 and the inclined plane 6′: this produces a wedging-in effect which allows an automatic recovery of the slacks determined by wear during the life of the gripper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP90106873A 1989-04-21 1990-04-10 Griffe porteuse avec coulisseau axial pour métiers sans navette Expired - Lifetime EP0394749B1 (fr)

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 true EP0394749A1 (fr) 1990-10-31
EP0394749B1 EP0394749B1 (fr) 1993-09-22

Family

ID=11164990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90106873A Expired - Lifetime EP0394749B1 (fr) 1989-04-21 1990-04-10 Griffe porteuse avec coulisseau axial pour métiers sans navette

Country Status (5)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651082A1 (fr) * 1993-10-27 1995-05-03 Interpatent Limited Griffe porteuse pour métiers à tisser
EP0653506A1 (fr) * 1993-11-16 1995-05-17 Ivo Moia Paire de griffes porteuses et tireuses positives pour métiers à tisser
CN107313159A (zh) * 2017-07-28 2017-11-03 阳信瑞鑫集团有限公司 一种织布机接纬剑
WO2018051193A1 (fr) * 2016-09-14 2018-03-22 Kurkute Sanjay Mécanisme de préhension de trame pour métiers à tisser sans navette

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2113237A5 (en) * 1970-10-27 1972-06-23 Fischer Ag Brugg Georg Suction cleaner for weft insertion unit - on shuttleless looms
FR2224569A1 (en) * 1973-04-07 1974-10-31 Fontanals Sa Shuttle-less loom with heated weft cutter - and suction nozzles for removing waste fibres
GB2083844A (en) * 1980-09-15 1982-03-31 Nuovo Pignone Spa Weft transfer devices in shuttleless looms
EP0123005B1 (fr) * 1983-04-18 1986-09-17 Maschinenfabrik Sulzer-Rüti Ag Pince pour l'insertion du fil de trame dans un métier à tisser à pince
EP0233142A1 (fr) * 1986-02-13 1987-08-19 GebràœDer Sulzer Aktiengesellschaft Pince pour l'insertion de la trame dans un métier à pinces
EP0266286A2 (fr) * 1986-10-31 1988-05-04 SOCIETE ALSACIENNE DE MATERIEL TEXTILE- SAMT (Société anonyme) Dispositif pour l'insertion des fils de trame sur les métiers à tisser sans navette

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1095254B (it) * 1978-04-07 1985-08-10 Somet Meccanica Tessile S P A Pinza portante per telai di tessitura ad alimentazione continua della trama

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2113237A5 (en) * 1970-10-27 1972-06-23 Fischer Ag Brugg Georg Suction cleaner for weft insertion unit - on shuttleless looms
FR2224569A1 (en) * 1973-04-07 1974-10-31 Fontanals Sa Shuttle-less loom with heated weft cutter - and suction nozzles for removing waste fibres
GB2083844A (en) * 1980-09-15 1982-03-31 Nuovo Pignone Spa Weft transfer devices in shuttleless looms
EP0123005B1 (fr) * 1983-04-18 1986-09-17 Maschinenfabrik Sulzer-Rüti Ag Pince pour l'insertion du fil de trame dans un métier à tisser à pince
EP0233142A1 (fr) * 1986-02-13 1987-08-19 GebràœDer Sulzer Aktiengesellschaft Pince pour l'insertion de la trame dans un métier à pinces
EP0266286A2 (fr) * 1986-10-31 1988-05-04 SOCIETE ALSACIENNE DE MATERIEL TEXTILE- SAMT (Société anonyme) Dispositif pour l'insertion des fils de trame sur les métiers à tisser sans navette

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651082A1 (fr) * 1993-10-27 1995-05-03 Interpatent Limited Griffe porteuse pour métiers à tisser
EP0653506A1 (fr) * 1993-11-16 1995-05-17 Ivo Moia Paire de griffes porteuses et tireuses positives pour métiers à tisser
WO2018051193A1 (fr) * 2016-09-14 2018-03-22 Kurkute Sanjay Mécanisme de préhension de trame pour métiers à tisser sans navette
CN107313159A (zh) * 2017-07-28 2017-11-03 阳信瑞鑫集团有限公司 一种织布机接纬剑
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

Also Published As

Publication number Publication date
ES2045619T3 (es) 1994-01-16
IT8920233A0 (it) 1989-04-21
DE69003433D1 (de) 1993-10-28
EP0394749B1 (fr) 1993-09-22
IT1230000B (it) 1991-09-20
ATE94920T1 (de) 1993-10-15
DE69003433T2 (de) 1994-01-20

Similar Documents

Publication Publication Date Title
JPH032974B2 (fr)
US4840203A (en) Process for clamping, fastening and presentation of weft threads in gripper weaving looms and device used to this end
EP0349039A1 (fr) Pince-fil pneumatique pour le dispositif de formation de lisière dans les métiers à tisser
EP0394749B1 (fr) Griffe porteuse avec coulisseau axial pour métiers sans navette
EP1803843A1 (fr) Pince de sortie pour métiers à tisser à performance améliorée pour l'insertion de double duite
US4570683A (en) Yarn holding device
US5129431A (en) Giver for a gripper loom
EP0306080A1 (fr) Dispositif de rentrage des fils de lisière pour métiers à tisser
CZ116493A3 (en) Weft insertion motion for a loom
EP0509255B1 (fr) Griffe porteuse pour métiers sans navette
CA1048379A (fr) Aiguille d'insertion de la trame sur metiers a tisser sans navette
GB2177725A (en) Process of weft thread insertion in a shuttleless loom, and a loom for carrying out the process
EP0571025B1 (fr) Griffe de prise utilisable dans un métier à tisser
JP4112885B2 (ja) レピア織機におけるキャリヤ糸グリッパのための糸クランプ
US4949762A (en) Weft gripper for shuttleless loom
US4320785A (en) Mechanism on shuttleless looms for the transfer of the end of the weft yarn
JPH0397938A (ja) 無ひ織機用よこ入れ具支持案内システム
US6725886B2 (en) Device for presenting weft yarns on a rapier weaving machine
GB2200658A (en) Weft thread cutting device
EP0504899B1 (fr) Pince de sortie pour métiers à tisser sans navette, en particulier pour le tissage de fils synthétiques
EA039748B1 (ru) Захватное устройство для вставки уточной пряжи в ткацких станках без челнока
US3986532A (en) Weft extending carrier
GB2173222A (en) Improved shuttleless loom
US4076052A (en) System for transferring a yarn from one part of a textile machine to another part
US3636989A (en) Wire loom with bobbinless weft inserting member

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR LI LU NL

17P Request for examination filed

Effective date: 19910410

17Q First examination report despatched

Effective date: 19920818

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR LI LU NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19930922

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19930922

Ref country code: AT

Effective date: 19930922

REF Corresponds to:

Ref document number: 94920

Country of ref document: AT

Date of ref document: 19931015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69003433

Country of ref document: DE

Date of ref document: 19931028

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2045619

Country of ref document: ES

Kind code of ref document: T3

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19940430

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940410

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20050408

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20050411

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20050419

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20050420

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20050426

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060411

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060430

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061101

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20061230

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20060411

BERE Be: lapsed

Owner name: SOCIETA' MECCANICA TESSILE S.P.A. *SOMET

Effective date: 20060430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060502