EP0084032B1 - Weft yarn metering device - Google Patents
Weft yarn metering device Download PDFInfo
- Publication number
- EP0084032B1 EP0084032B1 EP82902075A EP82902075A EP0084032B1 EP 0084032 B1 EP0084032 B1 EP 0084032B1 EP 82902075 A EP82902075 A EP 82902075A EP 82902075 A EP82902075 A EP 82902075A EP 0084032 B1 EP0084032 B1 EP 0084032B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- spool
- metering device
- finger
- discharge
- 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
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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 supply coil of yarn 28 has basically two main functions, viz to provide a supply of yarn for yarn guide arm 17 and to prevent slippage of yarn on the spool 12 as the arm 14 draws yarn from the yarn package (not shown).
- arms 14 and 17 are continually rotating so that arm 14 winds onto the spool a supply of yarn which is picked up and rewound onto the spool by arm 17. Accordingly since the rate of winding of arm 14 is the same as the rate of unwinding of the guide arm 17 the size of the supply coil 28 remains constant.
- the stop finger 20 moves axially along the spool away from arms 14 and 17.
- the ridge 26 has an inclined face 269 facing the terminal end of the spool 12.
- the purpose of the inclined face 269 is to encourage yarn wrapped about the spool 12 by the arm 17 to move axially along the spool to avoid overlapping of the yarn during winding.
- the rate of axial movement of finger 20 is arranged to be similar to the axial movement of yarn 16 along the spool.
- a similar inclined face 12a is provided at location 24 for co-operation with arm 14.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
Description
- The present invention relates to a metering device for use in a fluid jet loom for metering the amount of weft yarn supplied across the warp shed on each weaving cycle of the loom.
- It is known from FR-A-2 465 812 to provide a weft metering device having a stationary spool onto which yarn is wound by a yarn supply arm. The spool contains a series of stop fingers located within the spool and which are arranged to move in succession to emerge at a first axial position, move axially along the spool and then retract at a second axial position. The stop fingers are arranged such that when a stop finger retracts at the second position to discharge yarn a succeeding finger has already emerged at the first axial position. A further separate stop is provided which is selectively operable to hold discharged windings to delay discharge of the yarn until a subsequent weaving cycle.
- It is known from EP-A-0 024 561 to provide a weft metering device having a stationary spool divided into a storage region and a discharge region. A yarn supply arm is provided which winds yarn onto the storage region and simultaneously transfers windings of yarn from the storage region to the discharge region. Discharge of yarn from the discharge region of the spool is controlled by a pair of stop fingers. The pair of stop fingers are located within the spool and are spaced apart axially along the spool. The stop fingers are arranged to move radially between retracted and projected positions. Discharge of yarn is achieved by moving the fingers furthermost from the storage region to a retracted position.
- According to the present invention there is provided a yarn metering device comprising a stationary spool, and having a storage region and a discharge region, a yarn supply arm arranged to wrap yarn onto the storage region of the spool, a yarn guide arm provided for simultaneously transferring yarn from the storage region to the discharge region, a stop means co-operable with the spool for permitting yarn wrapped on the spool to be pulled axially off the spool after a predetermined quantity of yarn has been wrapped onto the spool, the stop means comprising a single finger located outside the spool and being arranged to move both radially and axially relative to the spool, the finger for each discharge of yarn being arranged to move radially inwardly at a first axial position to engage yarn being discharged from the yarn guide arm to thereby simultaneously initiate wrapping of yarn onto the discharge region of the spool by the yarn guide arm and to also define the metered length of yarn discharged from the device, the finger being arranged to then move axially along the spool to a second axial position and at said second axial position moves radially outwardly to release the yarn wrapped on the discharged region and during release of the yarn the finger returns to the first axial position before moving radially inwardly again.
- Reference is now made to the accompanying drawings in which:-
- Figure 1 is a schematic perspective illustration of part of a device according to the present invention;
- Figure 2 is a more detailed axial section through a device according to the present invention shown mounted on part of a loom; and
- Figure 3 is a cross-sectional view taken along line III-III in Figure 2.
- Referring initially to Figure 1, the
device 10 according to the present invention is a stationary orfixed spool 12 which is of generally cylindrical shape, and ayarn supply arm 14 which extends radially from the axis of the spool and which is rotatably mounted for rotation about said axis. Thearm 14 is hollow and is cranked so as to be able to wrapyarn 16 about the spool as will be described in greater detail later. The device also includes ayarn guide arm 17 which is conveniently diametrically opposed to thearm 14 and is rotatable in unison therewith. Theguide arm 17 picks up yarn deposited byarm 14 and re-wraps the yarn on the spool at a position further along the spool. The device also includes ayarn stop finger 20 which controls release of yarn from thespool 12 and initiates winding of yarn onto the spool byguide arm 17. As illustrated in Figure 1 thedevice 10 is arranged to supply yarn to anair jet nozzle 22 which drives the yarn across the warp shed of the loom (not shown). As indicated above,yarn 16 is wrapped onto the spool at two different locations on thespool 12. Theselocations ridge 26 so that the locations are physically separated. Atlocation 24 before operation of thedevice 10 the yarn is wrapped about thespool 12 by a predetermined minimum number of turns to define a supply coil ofyarn 28. The supply coil ofyarn 28 has basically two main functions, viz to provide a supply of yarn foryarn guide arm 17 and to prevent slippage of yarn on thespool 12 as thearm 14 draws yarn from the yarn package (not shown). During each weaving cycle of the loom,arms arm 14 winds onto the spool a supply of yarn which is picked up and rewound onto the spool byarm 17. Accordingly since the rate of winding ofarm 14 is the same as the rate of unwinding of theguide arm 17 the size of thesupply coil 28 remains constant. Asguide arm 17 wraps yarn onto thespool 12 thestop finger 20 moves axially along the spool away fromarms finger 20 is moved radially away from the spool to allow the yarn wound thereon byarm 17 to be pulled off by thejet nozzle 22. Thefinger 20 is simultaneously moved axially back toward thearms arm 17 to initiate wrapping of yarn about the spool. The cycle is then repeated. - The constant length of yarn stored on the spool in the
supply 28 is basically dependent on two variables, viz the number of revolutions made byarm 17 in each cycle and the diameter of the spool. The number of revolutions is controlled by a suitable choice of gearing ratios in drive from the main loom drive shaft and the spool is preferably constructed so that its diameter may be adjusted. Accordingly the amount of yarn stored on the spool may be accurately and easily adjusted. - The
finger 20 is timed to move radially inwardly after all the yarn wrapped onto the spool byarm 17 has been pulled off the spool. Thus the yarn is initially stopped byarm 17. However thearm 17 is rotating to unwind yarn from thesupply coil 28 and so this yarn is drawn from thearm 17 by theair jet nozzle 22 at a rate determined by the speed of movement of thearm 17 until the arm passes thestop finger 20 when the yarn will then be completely arrested by the stop and continued movement of thearm 17 causes the yarn to be wrapped about the spool. Thus inward movement of thestop finger 20 stops discharge of yarn from the device and simultaneously causes wrapping of yarn onto the spool. By suitably adjusting the rotary position of thearm 17 to thestop finger 20 and/or the timing of moving thefinger 20 radially inwards it is possible to adjust the length of yarn metered out at a controlled rate by thearm 17 to a desired value. - By way of example a specific embodiment of the present invention is described below with reference to Figures 2 and 3. In these Figures parts corresponding to similar parts in Figure 1 have been designated by the same reference numerals. In Figure 2, the
spool 12 is made up of individual segments 30 (only one of which is shown for the purposes of clarity). Thesegments 30 include an arcuate outerperipheral surface portion 31 which collectively make up the outer peripheral surface of thespool 12. Each segment has aweb 32 depending from thesurface portion 31 and theweb 32 is secured to anannular boss 34. Theweb 32 is provided with a radially extending slot (not shown) through which passes abolt 35 and aguide pin 36 so that each segment may be moved radially inwardly or outwardly so as to alter the effective diameter of thespool 12. - The
annular boss 34 houses a bearing 37 which rotatably receives a shaft 40 from whicharms annular boss 34 also includes a plurality ofmagnets 44 spaced about its circumference which co-operate withmagnets 45 received in afixed support 46 of thedevice 10.Magnets annular boss 34 and accordinglyspool 12 remain stationary despite rotation of shaft 40. The shaft 40 is also mounted inbearings 50 housed insupport 46. The shaft 40 has acentral bore 40a which communicates with the internal bore 14a ofarm 14 to provide a passageway foryarn 16. Air ducts 53 are provided to enable pressurised air to be supplied to bore 40a to enable threading ofyarn 16 throughbores 40a and 14a. Shaft 40 is provided with apinion gear 40b which meshes withgear 55 mounted on adrive shaft 56 of the loom. - The
stop finger 20 is mounted on asupport 60 which is pivotally mounted on aspindle 61. Thespindle 61 is mounted in asupport 62 which in turn is pivotally mounted on aspindle 63.Spindles finger 20 may be moved axially along the spool and also moved radially inwardly or outwardly relative to the spool. Such movement of thefinger 20 is achieved by a pair ofcams 67 which co-operate with a pair ofcam followers 68 mounted onsupport 60. Thecam followers 68 are biased into contact with thecams 67 via a spring 67a. Thecams 67 are shaped so that at two circumferential locations they have the same profile so as to move the finger radially inwardly or radially outwardly and at other times a different profile so as to cause the support to pivot aboutspindle 63 and so move thefinger 20 axially along the spool whilst it is maintained in either a radially innermost or radially outermost position. - As seen in Figure 2 the
ridge 26 has aninclined face 269 facing the terminal end of thespool 12. The purpose of theinclined face 269 is to encourage yarn wrapped about thespool 12 by thearm 17 to move axially along the spool to avoid overlapping of the yarn during winding. The rate of axial movement offinger 20 is arranged to be similar to the axial movement ofyarn 16 along the spool. A similarinclined face 12a is provided atlocation 24 for co-operation witharm 14.
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8121646 | 1981-07-14 | ||
GB8121646 | 1981-07-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0084032A1 EP0084032A1 (en) | 1983-07-27 |
EP0084032B1 true EP0084032B1 (en) | 1988-09-21 |
Family
ID=10523223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82902075A Expired EP0084032B1 (en) | 1981-07-14 | 1982-07-12 | Weft yarn metering device |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0084032B1 (en) |
JP (1) | JPS58501136A (en) |
DE (1) | DE3279046D1 (en) |
IT (1) | IT1190917B (en) |
WO (1) | WO1983000137A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8327676D0 (en) * | 1983-10-15 | 1983-11-16 | Bonas Machine Co | Yarn metering device |
GB8418669D0 (en) * | 1984-07-21 | 1984-08-22 | Bonas Machine Co | Metering weft yarn |
US4687150A (en) * | 1985-10-04 | 1987-08-18 | Alan Gutschmit | Strand storing and delivering device |
CH669621A5 (en) * | 1986-04-29 | 1989-03-31 | Sulzer Ag | |
JPS6445849A (en) * | 1987-08-07 | 1989-02-20 | Tagawa Kikai Kk | Fixed drum type weft yarn length measuring and yarn storage apparatus |
JPS6461539A (en) * | 1987-08-28 | 1989-03-08 | Tagawa Kikai Kk | Fixed drum type weft yarn length measuring and storage apparatus |
CN105369455A (en) * | 2015-06-05 | 2016-03-02 | 欧真自动化科技(上海)有限公司 | Synchronous servo weft accumulator |
CN107841818B (en) * | 2017-12-13 | 2023-05-02 | 浙江三禾智能科技有限公司 | Novel weft accumulator for restraining flight |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4132368A (en) * | 1976-10-28 | 1979-01-02 | Sulzer Brothers Limited | Drive for a yarn feeder for a textile machine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1547158A (en) * | 1966-12-13 | 1968-11-22 | Sulzer Ag | Loom with intermediate weft thread accumulator |
DE1929485A1 (en) * | 1969-06-11 | 1970-12-17 | Sobrevin | Delivery device for threads on looms, knitting machines or the like. |
JPS5516944A (en) * | 1978-07-18 | 1980-02-06 | Yoshida Kogyo Kk | Weft yarn lettoff motion |
JPS5626038A (en) * | 1979-08-10 | 1981-03-13 | Nissan Motor | Weft yarn storage apparatus of shuttleless loom |
NL7907093A (en) * | 1979-09-24 | 1981-03-26 | Rueti Te Strake Bv | METHOD FOR WEAVING WITH A SPOOLLESS WEAVING MACHINE, AND AN IMPOSITION PREPARATION MACHINE TO BE USED THEREIN. |
JPS5747951A (en) * | 1980-09-05 | 1982-03-19 | Nissan Motor | Drum type weft yarn length measuring and storing apparatus of shuttleless loom |
-
1982
- 1982-07-12 WO PCT/GB1982/000204 patent/WO1983000137A1/en active IP Right Grant
- 1982-07-12 DE DE8282902075T patent/DE3279046D1/en not_active Expired
- 1982-07-12 JP JP57502131A patent/JPS58501136A/en active Granted
- 1982-07-12 EP EP82902075A patent/EP0084032B1/en not_active Expired
- 1982-07-14 IT IT22390/82A patent/IT1190917B/en active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4132368A (en) * | 1976-10-28 | 1979-01-02 | Sulzer Brothers Limited | Drive for a yarn feeder for a textile machine |
Also Published As
Publication number | Publication date |
---|---|
JPH0232388B2 (en) | 1990-07-19 |
JPS58501136A (en) | 1983-07-14 |
IT1190917B (en) | 1988-02-24 |
EP0084032A1 (en) | 1983-07-27 |
DE3279046D1 (en) | 1988-10-27 |
WO1983000137A1 (en) | 1983-01-20 |
IT8222390A0 (en) | 1982-07-14 |
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