EP0405382A1 - Weft feeder device with swift-like drum for fluid-jet weaving looms - Google Patents
Weft feeder device with swift-like drum for fluid-jet weaving looms Download PDFInfo
- Publication number
- EP0405382A1 EP0405382A1 EP90111983A EP90111983A EP0405382A1 EP 0405382 A1 EP0405382 A1 EP 0405382A1 EP 90111983 A EP90111983 A EP 90111983A EP 90111983 A EP90111983 A EP 90111983A EP 0405382 A1 EP0405382 A1 EP 0405382A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- swift
- hub
- spokes
- radial
- adjustment element
- 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.)
- Withdrawn
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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
- D03D47/36—Measuring and cutting the weft
- D03D47/361—Drum-type weft feeding devices
- D03D47/362—Drum-type weft feeding devices with yarn retaining devices, e.g. stopping pins
Definitions
- the present invention relates to a weft feeder device for textile machines, particularly for high-speed fluid (air or water) jet looms.
- Weft feeders commonly termed weft holders, typically are devices provided with a fixed drum on which a rotating arm, driven by an electric motor, deposits and accumulates a reserve of turns of thread which are progressively removed by the loom or other textile machine with which the feeder is associated.
- the weft reserve In the case of fluid-jet loom feeding, the weft reserve must -- as is known -- be constituted by a whole number of turns the overall extension whereof corresponds to a portion of thread equal to the height of the fabric being produced.
- Adjustment occurs by trial and error, and it is therefore important to provide the swift with means suitable on one hand to allow the simultaneous and gradual movement of the spokes and on the other to facilitate the adjustment operation and at the same time make it rapid and accurate.
- the aim of the present invention is to provide a weft feeder device with swift-like drum as specified which has spoke adjusting means which are suitable for meeting said requirements.
- a further object of the invention is to provide a feeder device which has a simplified structure, is highly reliable in operation and has modest production costs.
- the present invention relates to a weft feeder device with swift-like drum which is characterized in that the hub of the drum has a frustum-shaped adjustment element on which the skid-like ends of the swift spokes rest with an elastic contact, said ends having a corresponding complementary taper; the frustum-shaped element being axially guided and movable and being provided with a threaded axial seat with which there co-operates an internally threaded shaft which, actuated from the outside, produces axial movements of said element and corresponding radial movements of the spokes in order to vary the polygonal perimeter of the swift.
- the reference numeral 10 generally indicates the weft feeder device, which comprises a fixed base 11 which is traversed by an axially hollow drive shaft 12 to which a hollow cantilevered arm 13 is connected in a per se known manner.
- the thread F passes in the cavity of the shaft 12 and of the arm 13 and unwinds from a reel, not illustrated, and is wound by the arm 13 on a fixed swift 14 so as to form a reserve of turns S suitable for being removed by the loom or other textile machine.
- the fixed swift 14 is rigidly coupled to a disk 15 which is mounted so as to be freely rotatable on the shaft 12 with the interposition of a bush 16 and of a pair of roller bearings 17.
- the disk 15 is prevented from rotating with respect to the shaft 12 by virtue of the action of permanent magnets 18 which co-operate with corresponding magnets 19 supported by the fixed base 11.
- a cylindrical raised portion 15a is defined on the disk 15, and the hollow hub 20 of the swift 14 is fitted thereon.
- An annular radial raised portion 21 is defined in the median part of the hub 20 and bears the seat for a central bearing 22.
- the raised portion 21 is furthermore provided with a plurality of through holes 23 in which columns 24 for the axial guiding and torsional retention of an adjustment element are slidable; said adjustment element is constituted by a frustum-shaped disk 25 which is axially movable in the cavity of the hub 20.
- Said disk has a threaded axial seat which engages the correspondingly threaded portion 26 of an internally threaded actuation shaft 27 which is supported so as to be freely rotatable by the bearing 22 and by a further bearing 28 which is supported by a front flange 29 which is rigidly coupled to the hub 20 by means of peripheral screws 30 and acts as cover for the cavity of the hub.
- a hexagonal seat 31 for the engagement of an actuation wrench is defined on the head of the internally threaded shaft 27; said wrench is passed through a front opening 32 of the flange 29.
- the pad-like ends 35 of the spokes 36 of the swift 14 rest on the adjustment element 25 and are pushed into elastic contact by corresponding radial springs 33 which are contained in respective blind seats 34 of the hub; the spokes are radially guided in corresponding radial seats 37 defined between the hub 20 and the front flange 29.
- a ring 29a inserted between the flange 29 and the hub 20, acts as stop element for the maximum radial expansion of the spokes by limiting the axial stroke of the adjustment element 25.
- the spokes 36 which are preferably made of polymeric material, are fitted with metallic rods 38 the ends whereof are accommodated in grooves 39 of the disk 15 and respectively in radial holes 40 of the front flange 29 in order to ensure the regular unwinding of the thread.
- the connecting screws 30 of the flange 29 are first loosened, releasing the spokes 36 from the clamping action exerted by said flange; then, by acting on a suitable wrench such as an Allen wrench inserted into the opening 32, the internally threaded shaft 27 is rotated and the adjustment element 25 is consequently moved axially, and this leads to a corresponding simultaneous radial movement of the spokes 36 of the swift.
- a suitable wrench such as an Allen wrench inserted into the opening 32
- the internally threaded shaft 27 is rotated and the adjustment element 25 is consequently moved axially, and this leads to a corresponding simultaneous radial movement of the spokes 36 of the swift.
- the screws 30 are tightened, locking the spokes in the required position by virtue of the clamping action of the flange 29. Adjustment occurs between the two extremes of maximum and minimum perimetric extension which are respectively illustrated in figures 1 and 3.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
A weft feeder device with swift-like drum (14) , for fluid-jet weaving looms, wherein the hub (20) of the drum has a frustum-shaped adjustment element (25) on which the pad-like ends (35) of the spokes (36) of the swift, which have a corresponding and complementary taper, rest with an elastic contact. The adjustment element is axially guided and movable and has a threaded axial seat with which an internally threaded shaft (27) cooperates. The internally threaded shaft is actuated from the outside and produces axial movements of the element and corresponding radial movements of the spokes in order to vary the polygonal perimeter of the swift.
Description
- The present invention relates to a weft feeder device for textile machines, particularly for high-speed fluid (air or water) jet looms.
- Weft feeders, commonly termed weft holders, typically are devices provided with a fixed drum on which a rotating arm, driven by an electric motor, deposits and accumulates a reserve of turns of thread which are progressively removed by the loom or other textile machine with which the feeder is associated.
- In the case of fluid-jet loom feeding, the weft reserve must -- as is known -- be constituted by a whole number of turns the overall extension whereof corresponds to a portion of thread equal to the height of the fabric being produced.
- This requirement is met by shaping the drum of the weft holder in the shape of a swift and by subjecting the spokes of the swift to radial movements in order to correspondingly adjust the perimeter of the polygon along which the turns of thread become arranged.
- Adjustment occurs by trial and error, and it is therefore important to provide the swift with means suitable on one hand to allow the simultaneous and gradual movement of the spokes and on the other to facilitate the adjustment operation and at the same time make it rapid and accurate.
- The aim of the present invention is to provide a weft feeder device with swift-like drum as specified which has spoke adjusting means which are suitable for meeting said requirements.
- A further object of the invention is to provide a feeder device which has a simplified structure, is highly reliable in operation and has modest production costs.
- In order to achieve this aim, this object and others which will become apparent from the following detailed description, the present invention relates to a weft feeder device with swift-like drum which is characterized in that the hub of the drum has a frustum-shaped adjustment element on which the skid-like ends of the swift spokes rest with an elastic contact, said ends having a corresponding complementary taper; the frustum-shaped element being axially guided and movable and being provided with a threaded axial seat with which there co-operates an internally threaded shaft which, actuated from the outside, produces axial movements of said element and corresponding radial movements of the spokes in order to vary the polygonal perimeter of the swift.
- Further characteristics, purposes and advantages of the invention will become apparent from the following detailed description and with reference to the accompanying drawings, which are given by way of non-limitative example and wherein:
- figure 1 is a partially longitudinally sectional view of the feeder device according to the invention in the configuration of maximum perimetric extension of the swift;
- figure 2 is a front elevation view of the feeder taken in the direction of the arrows II-II of figure 1;
- figure 3 is a partial reduced-scale view, similar to figure 1, of the device in the configuration of minimum perimetric extension of the swift.
- In the drawings, the
reference numeral 10 generally indicates the weft feeder device, which comprises afixed base 11 which is traversed by an axiallyhollow drive shaft 12 to which a hollowcantilevered arm 13 is connected in a per se known manner. The thread F passes in the cavity of theshaft 12 and of thearm 13 and unwinds from a reel, not illustrated, and is wound by thearm 13 on a fixedswift 14 so as to form a reserve of turns S suitable for being removed by the loom or other textile machine. - The fixed
swift 14 is rigidly coupled to adisk 15 which is mounted so as to be freely rotatable on theshaft 12 with the interposition of abush 16 and of a pair ofroller bearings 17. - In a per se known manner, the
disk 15 is prevented from rotating with respect to theshaft 12 by virtue of the action ofpermanent magnets 18 which co-operate withcorresponding magnets 19 supported by thefixed base 11. A cylindrical raisedportion 15a is defined on thedisk 15, and thehollow hub 20 of theswift 14 is fitted thereon. An annular radial raisedportion 21 is defined in the median part of thehub 20 and bears the seat for a central bearing 22. - The raised
portion 21 is furthermore provided with a plurality of throughholes 23 in whichcolumns 24 for the axial guiding and torsional retention of an adjustment element are slidable; said adjustment element is constituted by a frustum-shaped disk 25 which is axially movable in the cavity of thehub 20. - Said disk has a threaded axial seat which engages the correspondingly threaded
portion 26 of an internally threadedactuation shaft 27 which is supported so as to be freely rotatable by the bearing 22 and by afurther bearing 28 which is supported by afront flange 29 which is rigidly coupled to thehub 20 by means ofperipheral screws 30 and acts as cover for the cavity of the hub. - A
hexagonal seat 31 for the engagement of an actuation wrench is defined on the head of the internally threadedshaft 27; said wrench is passed through a front opening 32 of theflange 29. - The pad-
like ends 35 of thespokes 36 of theswift 14 rest on theadjustment element 25 and are pushed into elastic contact by correspondingradial springs 33 which are contained in respectiveblind seats 34 of the hub; the spokes are radially guided in correspondingradial seats 37 defined between thehub 20 and thefront flange 29. A ring 29a, inserted between theflange 29 and thehub 20, acts as stop element for the maximum radial expansion of the spokes by limiting the axial stroke of theadjustment element 25. - The
spokes 36, which are preferably made of polymeric material, are fitted withmetallic rods 38 the ends whereof are accommodated ingrooves 39 of thedisk 15 and respectively inradial holes 40 of thefront flange 29 in order to ensure the regular unwinding of the thread. - In order to adjust the polygonal perimeter of the swift, the connecting
screws 30 of theflange 29 are first loosened, releasing thespokes 36 from the clamping action exerted by said flange; then, by acting on a suitable wrench such as an Allen wrench inserted into the opening 32, the internally threadedshaft 27 is rotated and theadjustment element 25 is consequently moved axially, and this leads to a corresponding simultaneous radial movement of thespokes 36 of the swift. When the adjustment has been performed, thescrews 30 are tightened, locking the spokes in the required position by virtue of the clamping action of theflange 29. Adjustment occurs between the two extremes of maximum and minimum perimetric extension which are respectively illustrated in figures 1 and 3. - Without altering the concept of the invention, the details of execution and the embodiments may naturally be altered extensively with respect to what has been described and illustrated by way of non-limitative example without thereby abandoning the scope of the invention.
- Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the scope of each element identified by way of example by such reference signs.
Claims (7)
1. Weft feeder device with swift-like drum for fluid-jet weaving looms, characterized in that the hub of the drum has a frustum-shaped adjustment element on which the skid-shaped ends of the spokes of the swift rest with elastic contact, said ends having a corresponding and complementary taper; the adjustment element being axially guided and movable and having a threaded axial seat with which an internally threaded shaft co-operates, said internally threaded shaft, when actuated from the outside, producing axial movements of said element and corresponding radial movements of said spokes in order to vary the polygonal perimeter of the swift.
2. Device according to claim 1, characterized in that the frustum-shaped adjustment element is axially movable in a cavity of the hub of the swift which is frontally closed by a flange-shaped cover.
3. Device according to claims 1 and 2, characterized in that the frustum-shaped adjustment element is torsionally coupled and axially guided by columns which pass in corresponding holes of an annular radial raised portion defined in the cavity of the swift's hub.
4. Device according to claims 1 to 3, characterized in that the spokes of the swift are guided in radial seats defined between the hub and the radial flange; the loosening and tightening of the flange allowing the movement and respectively the securing of the spokes in the selected adjustment position.
5. Device according to the preceding claims, characterized in that the internally threaded shaft has a front poligonal seat for the engagement of an actuation wrench which passes in a corresponding hole of the front flange.
6. Device according to claim 1, characterized in that the end skids of the spokes are pushed into contact with the frustum-shaped adjustment element by the action of radial springs which are contained in respective dead seats of the hub.
7. Device according to the preceding claims, characterized in that the hub of the swift is supported by a fixed disk which is mounted so as to be freely rotatable on the motor shaft of the device and is prevented from rotating by the action of permanent magnets which cooperate with corresponding magnets supported by the base of the device, and in that the spokes of the swift are fitted with rods which have one end slidable in respective grooves of said disk and the other end slidable in respective radial holes of the flange of the hub.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT6753389 | 1989-06-29 | ||
IT8967533A IT1232531B (en) | 1989-06-29 | 1989-06-29 | WEFT DRUM FEEDER DEVICE FOR FLUID JET WEAVING FRAMES |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0405382A1 true EP0405382A1 (en) | 1991-01-02 |
Family
ID=11303213
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90111983A Withdrawn EP0405382A1 (en) | 1989-06-29 | 1990-06-25 | Weft feeder device with swift-like drum for fluid-jet weaving looms |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0405382A1 (en) |
IT (1) | IT1232531B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100441761C (en) * | 2002-02-08 | 2008-12-10 | 爱吉尔电子股份公司 | Weft feeding apparatus with system for connecting fixed bobbin to motor shell |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3429219A1 (en) * | 1984-08-08 | 1986-02-20 | Sobrevin Société de brevets industriels-Etablissement, Vaduz | THREAD STORAGE AND DELIVERY DEVICE |
US4756344A (en) * | 1986-07-14 | 1988-07-12 | Tsudakoma Corp. | Pick length setting method and device for use with a picking apparatus |
EP0290380A1 (en) * | 1987-04-24 | 1988-11-09 | GebràDer Sulzer Aktiengesellschaft | Weft thread storing apparatus with an automatic thread-measuring device for weaving looms |
-
1989
- 1989-06-29 IT IT8967533A patent/IT1232531B/en active
-
1990
- 1990-06-25 EP EP90111983A patent/EP0405382A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3429219A1 (en) * | 1984-08-08 | 1986-02-20 | Sobrevin Société de brevets industriels-Etablissement, Vaduz | THREAD STORAGE AND DELIVERY DEVICE |
US4756344A (en) * | 1986-07-14 | 1988-07-12 | Tsudakoma Corp. | Pick length setting method and device for use with a picking apparatus |
EP0290380A1 (en) * | 1987-04-24 | 1988-11-09 | GebràDer Sulzer Aktiengesellschaft | Weft thread storing apparatus with an automatic thread-measuring device for weaving looms |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100441761C (en) * | 2002-02-08 | 2008-12-10 | 爱吉尔电子股份公司 | Weft feeding apparatus with system for connecting fixed bobbin to motor shell |
Also Published As
Publication number | Publication date |
---|---|
IT1232531B (en) | 1992-02-19 |
IT8967533A0 (en) | 1989-06-29 |
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Legal Events
Date | Code | Title | Description |
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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 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE ES FR GB LI SE |
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17P | Request for examination filed |
Effective date: 19901130 |
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17Q | First examination report despatched |
Effective date: 19920902 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19930113 |