US3821878A - Open-end textile spinning machines - Google Patents

Open-end textile spinning machines Download PDF

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Publication number
US3821878A
US3821878A US00205684A US20568471A US3821878A US 3821878 A US3821878 A US 3821878A US 00205684 A US00205684 A US 00205684A US 20568471 A US20568471 A US 20568471A US 3821878 A US3821878 A US 3821878A
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United States
Prior art keywords
yarn
path
spinning
arm
holding means
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Expired - Lifetime
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US00205684A
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English (en)
Inventor
R Parsons
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Hollingsworth UK Ltd
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Platt International Ltd
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Assigned to HOLLINGSWORTH (UK) LIMITED, SCAITCLIFFE ST., ACCRINGTON, LANCASHIRE ENGLAND, AN ENGLISH COMPANY reassignment HOLLINGSWORTH (UK) LIMITED, SCAITCLIFFE ST., ACCRINGTON, LANCASHIRE ENGLAND, AN ENGLISH COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PLATT SACO LOWELL LIMITED,
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/50—Piecing arrangements; Control therefor for rotor spinning
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D01H15/004—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing for centrifugal spinning machines

Definitions

  • No.: 205,684 means and from which the yarn can be released so as to follow a shortened path thereby to enable the end of yarn to return to the fiber collecting surface and to [30] Foreign Apphcatmn Priority Data contact and twist in the fibers thereon.
  • the invention relates to an open-end spinning machine of the type in which fibres are fed in discrete form to a fibre collecting surface of a spinning rotor and withdrawn in the form of spun yarn by yarn take-up means.
  • the reserve length must be reformed in readiness for any subsequent end breakages or reductions in yarn tension or for subsequent rc-starting of the machine.
  • an open-end spinning machine comprising a spinning station at which fibres are fed in discrete form to a fibre collecting surface of a spinning rotor and withdrawn in the form of spun yarn by yarn take-up means and at which there is provided yarn piecing-up apparatus comprising a yarn reserve-length holding means which holds the yarn during normal spinning in an extended path between the spinning rotor and the yarn take-up means and from which the yarn can be released so as to follow a shortened path thereby to enable the end of yarn to return to the fibre collecting surface and contact and twist in the fibres thereon, and a yarn reserve-length forming means including a reciprocable yarn engaging member arranged to carry out a reciprocating movement to convey a yarn in the shortened path to the yarn holding means, the arrangement being such that the yarn engaging member moves during a part of the said reciprocating movement from a retracted position where it makes no contact with the yarn to an extended position to engage a yarn in the shortened path, to convey it to the yarn holding means and to surrender the
  • the yarn engaging member is attached to a reciprocal carriage and control means are provided to cooperate with said yarn engaging member to cause said member to move only to the extended position to engage said yarn in the shortened yarn path and to retract in the absence of yarn in the shortened yarn path and when the extended yarn path is established and the yarn released from the yarn engaging member.
  • the reciprocal carriage carries a plurality of yarn-engaging members serving a plurality of spinning stations of the machine.
  • FIG. 1 is a front elevation of yarn piecing-up apparatus of an open-end spinning machine according to a first embodiment of the invention
  • FIG. 2 is a plan partly in section of the apparatus shown in FIG. 1, with some of the parts removed for clarity,
  • FIG. 3 is a sectional plan drawn to an enlarged scale of a loop forming mechanism forming part of the apparatus shown in FIGS. 1 and 2,
  • FIG. 4 is a section of the apparatus shown in FIG. 3, taken on the line IVIV in FIG. 3,
  • FIG. 5 is a rear elevation of the apparatus shown in FIG. 3,
  • FIG. 6 is a front elevation of yarn piecing-up apparatus of an open-end spinning machine according to a further embodiment of the invention, with parts thereof removed for clarity, and
  • FIG. 7 is a plan partly in section of the apparatus shown in FIG. 6.
  • spun yarn I is withdrawn from the fibre-collecting surface of a spinning rotor (not shown) through a doffing tube 2 by means of delivery rollers 3 and 4. Between the doffing tube 2 and the delivery rollers 3 and 4, the yarn contacts a sensing arm 5 of a yarn-tension detecting switch,'the function of which will hereinafter be described.
  • the spun yarn 1 during spinning, normally follows-a path around an upper arm 6 of a fixed guide 7, around a hook portion 50 of a latch 8, and then around a lower arm 9 of the fixed guide 7, after which the yarn is collected on a package in the conventional manner.
  • An extended yarn path is therefore provided by forming a reserve loop around the latch 8, which serves as a reserve-loop holding member.
  • the fixed guide 7 and the latch 8 are fixedly attached to a housing 10, which houses a yarn reserve-loop releasing mechanism 11 fixedly attached to the machine frame.
  • the loop releasing mechanism 11 includes a solenoid 12, through the centre of which passes an actuating rod 13, which moves in response to energisation of the solenoid.
  • the actuating rod 13 extends from the left-hand end of the solenoid 12, as seen in FIGS. 1 and 2, and is bent through a right angle to form an arm 14, which passes through a slot 15 in the lower end of a lever-16 pivotally supported at its upper-end by trunnions 17 and 18 which extend from each side of the lever 16 at right angles thereto.
  • the .trunnions l7 and 18 have their ends conically reduced so that they accurately lo- ,cate in seatings formed in bearings 19 and 20, which are so mounted in the housing 10 that the distance between them can be adjusted to ensure accurate location.
  • a boss 21 Fixedly attached to the supporting trun'nion 17 is a boss 21, which carries the lower end of a yarn deflecting arm 22 extending upwardly through a slot 23 formed in the housing 10.
  • the deflecting arm 22 passes upwardly in front of the driving roller 4, and then downwardly towards the nip formed between the rollers 3 and 4 so that a hooked end portion 24 thereof encompasses the yarn 1.
  • the actuating rod 13 also extends from the solenoid 12 at the right-hand end thereof, as seen in FIGS. 1 and 2, and has mounted on this end a tongue operating arm 25. Between the tongue operating arm 25 and the solenoid 12 there is arranged a compression spring 26,
  • the tongue operating arm 25 is formed with a closed slot through which passes 21 depending arm of a tongue member 27 which is in the form of a cranked lever pivotally connected to the latch 8 at the point 28.
  • the latch 8, as seen in FIG. 4, is formed with two side pieces between which the tongue 27 is pivotally mounted.
  • the loop releasing mechanism 11- is arranged to operate when a decrease in tension in the spun yarn occurs. This decrease in tension is detected by the sensing arm of the yarn-tension detecting switch which causes encrgisation of the solenoid 12.
  • the actuating rod 13 moves to the left, as seen in FIGS. 1 and 2, with a force sufficient to overcome the biasing force of the spring 26.
  • the arm 14 engaging the slot 15 causes the lever 16 and the yarn deflecting arm 22 to pivot about the bearings 19 and 20 in a clockwise direction.
  • the yarn 1 is thus engaged by the hooked end portion 24 of the yarn deflecting arm 22 and is removed out of the nip formed between the delivery rollers 3 and 4 so that momentarily they cease to withdraw the yarn through the doffing tube 2.
  • the tongue operating arm 25 on the actuating rod 13 moves to the left and causes the tongue .member 27 to pivot in a clockwise direction.
  • tongue member 27 releases the yarn from the latch 8 so that the path of the yarn is shortened, which enables the tail end of yarn to return to contact and to twist in fibres 0n the collecting surface of the spinning rotor, thereby effecting an end breakage repair.
  • the solenoid 12 is energised only momentarily and the spring 26 subsequently causes the actuating rod 13 to return to its inoperative position. As this happens, the hooked end portion 24 of the yarn deflecting arm 22 returns and the yarn 1 reverts into the nip between delivery rollers 3 and 4 so that delivery of spun yarn recommences.
  • the release of yarn can, of course, be effected on starting the spinning operation by pulsing solenoid l2 such that the yarn is removed from the latch 8 thereby enabling the tail end of yarn to contactand twist in fibres on the fibre collecting surface of the spinning rotor.
  • the yarn is now following a shortened yarn path and it will be appreciated that the reserve loop must be reformed in readiness for release upon any subsequent decrease in yarn tension or for starting following machine stoppage.
  • a loop re-forming mechanism which comprises at each spinning station a yarn pick up mechanism 136 arranged in .a slot 30 of a carriage bar 29 common to all the stations and extending along the length of the machine behind the loop releasing mechanism 11.
  • the yarn pick-up mechanism at each station comprises a yarn pick-up arm 31 which is pivotally supported on trunnions 32 and 33which protrude from the sides of the arm 31- and which are formed with conical ends which engage in bearings 34 and 35.
  • the pick-up arm 31 is provided at one end with a yarn engaging end portion 36 and at the other end with a counterbalance portion 37 to ensure fine balancing of the arm.
  • a two-armed lever 140 mounted within the slot 30 is a two-armed lever 140 provided with supporting trunnions 38 and 39 having conically formed ends which engage in bearings 40 and 41 located in opposite sides of the slot 30.
  • One arm 42 of the two-armed lever 140 is bent so that it engages in a slot 43 provided in the yarn pick-up arm 31, and the other-arm 44 extends outside the periphery of the bar 29.
  • Attached to the arm 44 is one end of a tension spring 45 which tends to bias the two-armed lever 140 in an anti-clockwise direction as seen in FIG. 3.
  • the other end of the spring is anchored to a peg 46 which is located in a bore 47 by a screw 48.
  • the loop-forming mechanism functions as follows.
  • the carriage bar 29 continuously moves to and fro during the entire spinning operation.
  • the yarn pick-up mechanism 136 would be in a retracted position indicated in broken lines as shown in FIGS. 2 and 3 due tothe action of spring 45 on the trip arm 44.
  • the trip arm 44 comes into contact with a stop 49 which causes the two-armed lever 140 to pivot on trunnion arms 38 and 39, overcoming the force of spring 45, so that it takes up the position shown in full lines-in FIG. 3.
  • the pivotal movement ofthe arm 42 of the lever l40,'by its engagement with slot 43 in the yarn pick-up arm 31, causes the yarn-engaging end portion 36 to protrude from the side of the carriage bar 29.
  • the bar 29 then commences its loop forming stroke in the direction of arrow B (see FIG. 2) and as the yarn engaging portion 36 passes between guide arms 6 and 9 it picks up the yarn 1 and begins to take it towards the latch 8.
  • the trip arm 44 disengages from the stop 49 but the mechanism is held in position by the tension in the yarn which is sufficient to overcome the force of spring 45.
  • the yarn 1 is therefore conveyed over the hook portion 50 of the latch 8 until the bar 29 reaches the end of the loop forming stroke.
  • On a further return stroke of the bar 29 the yarn is caught by the hook portion 50 which retains the yarn and provides a reserve length of yarn available for release during any subsequent decrease in yarn tension.
  • the arrangement gives the advantage that during reciprocation of the loop forming mechanism at no time is the yarn engaging portion 36 in a position in which it would interfere with a yarn during release of. the latter to the shortened path.
  • the carriage bar 29 preferably reciprocates continuously during the spinning process, it could be arranged for movement of the carriage to be initiated only when detection of a reduction in tension of the spun yarn occurs.
  • the arrangement is such that the speed of the carriage bar 29 during the return stroke is greater than the speed of the bar during the loop forming stroke.
  • the reserve length of yarn is formed at a position between the doffing tube 2 and the delivery rollers 3 and 4.
  • spun yarn l is withdrawn from the fibre-collecting surface of a spinning rotor (not shown) through a doffing tube 2 by means of delivery rollers 3 and 4.
  • the spun yarn After emergence from the doffing tube 2 the spun yarn, during spinning, normally follows a path around an upper fixed guide 51, around a hook portion 52 and then around a lower fixed guide 51'.
  • the yarn then passes through the delivery nip provided by the delivery rollers 3 and 4 to be delivered thereby and collected on a package in a conventional manner.
  • An extended path is thereby provided during normal spinning by forming a reserve loop around the hook portion 52.
  • the hook portion 52 is formed on one end of a yarn holding arm 53 which constitutes part of a yarn reserve-loop holding mechanism 54.
  • the yarn reserve-loop holding arm 53 is pivotally mounted at 55 to a bracket 56 and has a counterbalance portion 57 provided at the end opposite to the hook portion 52 to ensure fine balancing of the arm.
  • Also pivotally mounted on the bracket 56 at 59 is a twoarmed lever 58 one arm 60 of which is bent so that it engages in a slot 61 provided in the arm 53.
  • a trip arm 62 extends outwardly and functions in a manner hereinafter described.
  • the trip arm 62 is engaged by one end of a tension spring 63 the other end of which is anchored to a tension adjusting screw 64 which can be turned to alter the tension in the spring 63.
  • the spring 63 therefore, tends to turn the two-arm lever 58 in an anti-clockwise direction (as seen in FIG. 7) which causes the arm 53 to pivot about the point 55 in a clockwise direction (as seen in FIG. 7).
  • the tension in the yarn is sufficient to overcome the effect of the spring 63 and the arm 53 is thereby held in the position shown in FIG. 7.
  • the spring 63 causes the two arm-lever 58 to turn in an anti-clockwise direction.
  • the end of the arm 60 slides down the slot 61 and causes the arm 53 to pivot in a clockwise direction.
  • the yarn is thereby released from the hook portion 52 so' that the path of the yarn is shortened, which enables the tail end of yarn to tween guides 51 and 5], which must be lengthened again in readiness for release upon any subsequent decrease in yarn tension.
  • This lengthening is effected by a loop reforming mechanism 136 arranged in a slot 30 of a carriage bar 29 common to all the stations and extending along the length of the machine.
  • the loop reforming mechanism 136 functions in exactly the same manner as that provided in the embodiment described with reference to FIGS.
  • the yarn reserve-loop holding mechanism 54 will be in a retracted position i.e. as'shown in broken lines in FIG. 7 and the hook portion 52 of the yarn holding arm 53 must be returned to a position in which it will engage with the yarn.
  • This is effected by a trip operating member 65 fixedly attached to the reciprocating carriage bar 29, which contacts the trip arm 62 and thus causes the lever 58 to pivot in a clockwise direction, thereby pivotingthe yarn holding arm 53 about the point 55 to place the hook portion 52 in a yarn receiving position.
  • the yarn l is carried slightly beyond the hook portion 52 until the carriage reaches the end of the loop forming stroke.
  • a spinning station including a spinning-rotor having a fiber collecting surface, fiber feed means for feeding fibers to the fiber collecting surface in discrete form and yarn take-up means for withdrawing spun yarn from the fiber collecting surface;
  • a yarn piecing-up apparatus comprising:
  • a yarn reserve length holding means for holding the yarn during normal spinning in an extended path between the spinning rotor and the yarn take-up means
  • yarn release means for releasing the yarn from the yarn reserve length forming means to enable the end of the yarn to return to the fiber collecting surface in a shortened path and to contact and twist in the fibers thereon;
  • a yarn reserve length forming means including a yarn engaging member
  • first yarn engaging member moving means for moving the yarn engaging member in a reciprocating first movement between a position adjacent a yarn in the shortened path and a position adjacent the yarn holding means
  • second yarn engaging member moving means for moving the yarn engaging member only when the yarn is in the shortened path in a second movement during said reciprocating first movement between a retracted position in which the yarn engaging member makes no contact with the yarn to an extended position;
  • the yarn engaging member in the extended position engages the yarn in the shortened path and maintains said extended position while conveying the yarn to the yarn holding means, by said first movement, where the yarn is surrendered to the yarn holding means to form or re-form the extended yarn path.
  • first yarn engaging member moving means includes a reciprocable carriage which supports the yarn engaging member and which reciprocates to effect the said reciprocating first movement of the yarn engaging member
  • second yarn engaging member moving means includes displacing means for displacing the yarn engaging member into the extended position during the said part of the reciprocating movement thereof.
  • a machine wherein the yarn engaging member is pivotable between the retracted and extended positions
  • the second yarn engaging member moving means comprises a lever cooperating with the yarn engaging member and pivotal between a first position in which the yarn engaging member takes up the retracted position and a second position in which it holds the yarn engaging member in the extended position and a fixed stop member for engagement by the lever during the said part of the reciprocating movement of the yarn engaging member to pivot the lever from-the first position to the second position.
  • a machine according to claim 3 and further including spring means acting upon the said lever for biasing the yarn engaging member to the retracted position means.
  • a machine according to claim 2 and further com- .prising control means for responding to movement of a yarn moves to the shortened path to commence the said reciprocating movement of the carriage.
  • a machine comprising at least one further spinning station at which fibres are fed in discrete form to a fiber collecting surface of a spinning rotor and withdrawn in the form of a spun yarn by yarn take-up means, and at which yarn piecing-up apparatus is provided identical to the yarn piecing-up apparatus provided at the first-mentioned station, and wherein the yarn engaging member associated with the station is supported by the said reciprocable carriage supporting the yarn-engaging member associated with the said first-mentioned station.
  • the yarn reserve length holding means includes a fixed yarn holding member around which the yarn passes in the extended path and a yarn releasing mechanism for releasing the yarn from the fixed yarn holding member into the shortened path.
  • the yarn reserve length holding means includes control means for responding to a release signal to operate said yarn releasing mechanism.
  • the yarn releasing mechanism comprises a displaceable latch and wherein the said control means comprises a solenoid for responding to said release signal to move the said latch to engage the yarn and release it from the yarn holding member.
  • a machine including a pair of delivery rollers through a hip of which the yarn passes before passing along said extended path, wherein said yarn reserve length holding means includes yarn deflecting means, and said control means is responsive to said release signal and causes said yarn deflecting means to deflect the yarn from a path in which it passes through the nip of the delivery rollers to a path in which it is clear of the nip of the delivery rollers.
  • the yarn reserve-length holding means includes a yarntension detecting means responsive to a reduction in yarn tension to generate said release signal.
  • the yarn reserve-length holding means comprises a yarn holding member for movement between a yarn holding position in which it holds the yarn in the extended path and a yarn release position in which it releases the yarn to take up the shortened path, and biasing means for biasing the yarn holding member to the yarn release position, the tension in the yarn held in the extended path by the yarn holding member maintaining the yarn holding member in the yarn holding position while a predetermined reduction in tension of the yarn allows the yarn holding member to move to the release position to release the yarn.
  • the first yarn engaging member moving means includes a reciprocable carriage which supports the yarn engaging member and which reciprocates to effect the said reciprocating first movement of the yarn engaging memher
  • the second yarn engaging member moving means includes displacing means for displacing the yarn engaging member into the extended position during the said part of the reciprocating movement 9 10 thereof
  • the yarn reserve-length holding means the excursion of the carriage during which the yarn is comprises stop means carried on said carriage for dissurrendered to the yarn holding member by the yarn placing the yarn holding member from the yarn release engaging member. position-to the yarn holding position during that part of

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US00205684A 1970-12-11 1971-12-07 Open-end textile spinning machines Expired - Lifetime US3821878A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5898770A GB1376110A (en) 1970-12-11 1970-12-11 Open-end textile spinning machines

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US3821878A true US3821878A (en) 1974-07-02

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US00205684A Expired - Lifetime US3821878A (en) 1970-12-11 1971-12-07 Open-end textile spinning machines

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US (1) US3821878A (cs)
CH (1) CH547875A (cs)
CS (1) CS181217B2 (cs)
DE (1) DE2161642A1 (cs)
ES (1) ES397847A1 (cs)
FR (1) FR2118050B1 (cs)
GB (1) GB1376110A (cs)
IT (1) IT945337B (cs)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911658A (en) * 1972-12-14 1975-10-14 Platt International Ltd Method of and apparatus for the piecing up of yarns
US4023336A (en) * 1974-06-26 1977-05-17 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Yarn reserve forming and moving apparatus
US4031691A (en) * 1975-08-20 1977-06-28 Nuova San Giorgio S.P.A. Device for reinserting the broken yarn in an open end spinning unit
US4041685A (en) * 1973-11-16 1977-08-16 Zinser Textilmaschinen Gmbh Process and apparatus for reattachment of a thread in an open-end spinning machine
US4221110A (en) * 1977-09-14 1980-09-09 Platt Saco Lowell Limited Yarn piecing device for open-end spinning machines
US4248037A (en) * 1979-10-02 1981-02-03 Platt Saco Lowell Limited Yarn positioning means for open-end spinning machine piecing apparatus
US4494371A (en) * 1982-08-12 1985-01-22 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method and apparatus for yarn piecing in a ringless spinning machine
US4545193A (en) * 1983-04-15 1985-10-08 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method for piecing fasciated yarn

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2234759A (en) * 1989-10-10 1991-02-13 Hollingsworth Piecing a rotor spinning head

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1546588A (fr) * 1966-08-24 1968-11-22 Rieter Ag Maschf Procédé pour réintroduire une extrémité du fil dans le poste de rassemblement de fibres d'un dispositif de filage à bout libre, et dispositif pour sa mise en oeuvre
BE759650A (fr) * 1969-12-03 1971-04-30 Schubert & Salzer Maschinen Procede et dispositif pour la filature de rubans de fibres

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911658A (en) * 1972-12-14 1975-10-14 Platt International Ltd Method of and apparatus for the piecing up of yarns
US4041685A (en) * 1973-11-16 1977-08-16 Zinser Textilmaschinen Gmbh Process and apparatus for reattachment of a thread in an open-end spinning machine
US4023336A (en) * 1974-06-26 1977-05-17 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Yarn reserve forming and moving apparatus
US4031691A (en) * 1975-08-20 1977-06-28 Nuova San Giorgio S.P.A. Device for reinserting the broken yarn in an open end spinning unit
US4221110A (en) * 1977-09-14 1980-09-09 Platt Saco Lowell Limited Yarn piecing device for open-end spinning machines
US4248037A (en) * 1979-10-02 1981-02-03 Platt Saco Lowell Limited Yarn positioning means for open-end spinning machine piecing apparatus
US4494371A (en) * 1982-08-12 1985-01-22 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method and apparatus for yarn piecing in a ringless spinning machine
US4545193A (en) * 1983-04-15 1985-10-08 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method for piecing fasciated yarn

Also Published As

Publication number Publication date
DE2161642A1 (de) 1972-06-29
FR2118050B1 (cs) 1974-06-07
FR2118050A1 (cs) 1972-07-28
GB1376110A (en) 1974-12-04
CS181217B2 (en) 1978-03-31
ES397847A1 (es) 1974-06-01
CH547875A (de) 1974-04-11
IT945337B (it) 1973-05-10

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Owner name: HOLLINGSWORTH (UK) LIMITED, SCAITCLIFFE ST., ACCRI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PLATT SACO LOWELL LIMITED,;REEL/FRAME:004198/0296

Effective date: 19830801