EP0394749A1 - Griffe porteuse avec coulisseau axial pour métiers sans navette - Google Patents
Griffe porteuse avec coulisseau axial pour métiers sans navette Download PDFInfo
- 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
Links
- 238000009941 weaving Methods 0.000 title 1
- 230000033001 locomotion Effects 0.000 claims abstract description 24
- 238000004140 cleaning Methods 0.000 claims description 8
- 229910052729 chemical element Inorganic materials 0.000 claims description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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)
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 |
---|---|---|---|
IT2023389 | 1989-04-21 | ||
IT8920233A IT1230000B (it) | 1989-04-21 | 1989-04-21 | Pinza portatrama a cursore mobile assialmente, per telai di tessitura senza navetta. |
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)
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)
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 | GebràDer 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)
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 |
-
1989
- 1989-04-21 IT IT8920233A patent/IT1230000B/it active
-
1990
- 1990-04-10 EP EP90106873A patent/EP0394749B1/fr not_active Expired - Lifetime
- 1990-04-10 AT AT90106873T patent/ATE94920T1/de not_active IP Right Cessation
- 1990-04-10 ES ES90106873T patent/ES2045619T3/es not_active Expired - Lifetime
- 1990-04-10 DE DE90106873T patent/DE69003433T2/de not_active Expired - Fee Related
Patent Citations (6)
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 | GebràDer 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)
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 |
---|---|
IT1230000B (it) | 1991-09-20 |
DE69003433T2 (de) | 1994-01-20 |
ES2045619T3 (es) | 1994-01-16 |
EP0394749B1 (fr) | 1993-09-22 |
ATE94920T1 (de) | 1993-10-15 |
IT8920233A0 (it) | 1989-04-21 |
DE69003433D1 (de) | 1993-10-28 |
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