US3854274A - Method and apparatus for joining broken ends - Google Patents

Method and apparatus for joining broken ends Download PDF

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Publication number
US3854274A
US3854274A US00264527A US26452772A US3854274A US 3854274 A US3854274 A US 3854274A US 00264527 A US00264527 A US 00264527A US 26452772 A US26452772 A US 26452772A US 3854274 A US3854274 A US 3854274A
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United States
Prior art keywords
thread
spinning
chamber
signal
fibers
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US00264527A
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English (en)
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G Bartling
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SKF GmbH
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SKF Kugellagerfabriken GmbH
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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

Definitions

  • ABSTRACT Method and apparatus for rejoining broken thread in a spindleless spinning machine wherein the thread is formed in a turbine and withdrawn.
  • a sensor is provided to sense the breakage of the thread and in response thereto to stop the withdraw] of the thread and of the spinning operation and to institute the cutting of the broken thread and the reversal of the thread into the spinning turbine.
  • the return of the thread and the recommencing of the spinning being timed by an impulse counter initiated by the reversing thread passing the sensor.
  • the present invention relates to a method and apparatus for the respinning of broken thread with the spin ning fiber ring in spindleless spinning machines.
  • the respinning or joining of broken yarn with newly spun fibers in spindleless apparatus is generally carried out by stopping the spinning, cutting the broken thread and returning the thread to the spinning turbine where the newly spun fibers join with it.
  • This operation is accompanied by great problems, since in order to make a successful juncture, a great number of factors have to be taken into consideration. This is, especially so, if the quality of the spun yarn is not to be lessened by any noticeably irregular joining points.
  • the piece end or broken section of thread be removed since this piece of yarn usually has the irregularities which had caused the breaking of the yarn in the first place.
  • a device for elimination of breaking threads in a spinning machine with rotating spinning chamber is known.
  • the yarn outlet duct is provided with a yarn sensor and a winding spool and a pair of take-up rollers, coupled to each other by a transmission gear.
  • the driving motor and the transmission gear are provided with a reversing gear which, when the thread is broken, are activated by the sensor, so that the spool and the take-up roller return the thread into the spinning chamber.
  • a measuring device and a contact which is controlled by the same is provided, whereby the take-up rollers and the spool after a number of revolutions are again switched to run forward.
  • the present invention has the object to provide a method and apparatus for respinning a broken thread in an open end spinning apparatus, whereby, on the one hand, the return delivery of a defined thread length is assured, and whereby, on the other hand, it is also assured'that the end reaches the joining or splicing point on the spinning chamber wall at the right speed and at a moment when a fiber ring of the desired consistency has been attained.
  • the thread end after a thread break, is cut at a predetermined distance from the splicing or joining point of the spinning turbine. Only after this cutting, the return delivery of the thread is commenced. The return is timed by the counting of impulses which are derived from an impulse generator which starts counting only, when the cut thread end passes a thread sensor, which lies between the cutting means and the joining point.
  • the apparatus is characterized in that the thread take-up rollers comprise two jointly pivotable rollers of the same diameter, one of which is made to engage a rotating drive roller to withdraw the thread while the other roller is made to engage the drive roller for return delivery of the thread, and which both together are pivotable away from the driven roller. Further, an impulse generator is coupled to drive roller so that perfect timing can be obtained. It has been of advantage to pivot the take-up rollers around a common center of gravity by means of a common element connected with the control circuit.
  • FIG. 1 is a plan view of apparatus for carrying out the inventive method shown during normal spinning procedure
  • FIG. 2 is the apparatus according to FIG. 1 in the manufacturing position after a thread break and when the respinning is being prepared;
  • FIG. 3 is the apparatus according to FIGS. 1 and 2 in the manufacturing postion during the return delivery of the yarn to the spinning chamber.
  • a spindleless spinning assembly generally depicted by the numeral 1, comprises a rotating spinning turbine 9 mounted within the chamber of an enclosed housing.
  • the construction of the spindle assembly may be conventional in form and its details are therefore known to those skilled in this art.
  • the assembly produces in the known manner a thread 3 which is pulled through an outlet channel or tube 8.
  • an electrical sensor such as a photoelectric cell 2 cooperating with a light source or similar device is mounted on the tube 8 to sense the continuity of the thread 3.
  • the thread 3, in normal operation FIG.
  • rollers 4a and 4b which are biased to press against each other.
  • the rollers 4a and 4h have a smooth outer circumference and are driven by a continuously clockwise rotating wheel or roller which extends across and in contact with each of similar rollers employed along the spindle bank of a multiple spinning assembly machine.
  • the roller 4a is mounted at the end of a lever which is biased by a spring 12 to pivot about a point 13 into normal operating engagement with the drive roller 5.
  • the roller 4! is mounted at the end of a bell crank 16 also pivoted at the point 13 and biased by a spring 6 to press the roller 4b against the surface of roller 4a for conjoint swinging and rolling.
  • the thread 3 passes over a dancer roll and arm 11 which is adapted to oscillate and resiliently accumulate a length of thread in reserve during the operation of the apparatus.
  • the thread 3 then passes over a grooved drum 10 on which a take-up spool 21 rests.
  • the grooved drum 10 rotates the spool 21 and acts to apply the thread in an even manner across it.
  • the drum l0 and therefore the spool 21 abutting against it is driven by the roller 4a abutting against the common drive roller 5 via a transmission such as a chain or belt 14 arranged with the axle or shaft for roller 4a.
  • the electric sensor 2 is connected to a control circuit schematically shown by the numeral 20.
  • the control circuit may employ one or more relays, solid state amplifier circuits, timing devices, etc.
  • the photoelectric sensor suggested is of conventional construction producing an electric signal output on sensing the presence or absence of a given object in line withit. In the present situation should the normal operation of the spinning assembly be disturbed by a break in the thread'3 (see FIG. 2), the sensor 2 produces a signal passing to the control circuit 20.
  • a pair of brake means 17 and 18 which are mounted respectively to stop the rotation of either or both of the rollers 4a, 4b and the groove drum 10 on command of the control circuit on receipt of a signal inducing a break in the thread.
  • a two stage actuator 19 such as a double winding solenoid with magnet core is mounted generally perpendicular to the long arm of the bell crank 16 and is connected to it by a bolt and pin 39.
  • the actuator is adapted to move the lever 16 and to hold it securely against the roller 4a so that both of said rollers 4a, 4b come free of the driving roller 5. Simultaneously rollers 4a and 4b are stopped by,
  • the braking means 17 This stops the movement of the thread 3 and maintains the length of the thread hanging in the outlet tube 8 below the rollers 4a and 4b.
  • the movement of the lever 16 by the actuator 19 is limited by a micro-switch or the like arranged at a predetermined distance from the edge of the lever 16. In stopping the rollers and the grooved drum 10 the dancer roller and arm 11 acts to provide a sufficient length of thread in case spool 21 due to its weight has not yet stopped completely.
  • the control circuit causes a normally closed resiliently biased clutch or coupling 25 to open by deenergizing its solenoid coil 24.
  • the clutch 25 normally operates the paired feed rollers 26 by which the raw fiber band 27 is fed to the spinning chamber.
  • the control circuit 20 activates a cutting element 7 which is arranged between the spinning assembly 1 and the rollers 4a and 4h.
  • the cutting element 7 is mounted at the end of the tube 8 in axial alignment with the thread and may be of conventional construction known to those skilled in the art.
  • the spinning turbine 9 is maintained under vacuum via a conduit 31 extending from a source of vacuum 32 such as a reservoir or air pump.
  • the piece of thread remaining in the outlet tube 8 cut by the cutter 7 is thus carried away together with the other fiber particles, pulp, etc, present in the spinning chamber. This removes from the thread 3 the portion of the thread in which the irregularity causing the yarn breakage in the first place and leaves a cohesive well formed thread end.
  • the spinning assembly housing is pivoted at its upper end 29 and is swung from its other end by a second solenoid or similar actuator 28 having a rod reciprocable in the path indicated by the arrow.
  • the drive whorls for the spinning turbine 9 and the fiber picker and-loosening rollers extend out of the housing.
  • Solenoid 28 is actuated by a signal from the control circuit 20 so that the housing is pivoted simultaneously with the application of brakes l7 and 18 and the actuation of the first solenoid 19 so that the spinning turbine 9 and the fiber pickers 33 are also disengaged from their drive means as seen in FIG. 2.
  • roller 4b The rotation of the roller 4b is thus reversed from it normal operation direction; i.e., when roller 4a is in contact with the roller 5, and in this event, will cause the thread 3 to be pulled downwardly.
  • the slot 39 is of a length that after latch 23 engages the lever, the actuator 28 may be returned to its forward or original position.
  • the thread 3 with its end is moved backwardly through the tube 8 into the spinning chamber without reversal of any of the drive means or special operation of the other parts.
  • a new impulse signal is sent to the control circuit.
  • the control circuit in turn causes the coupling 25 to close, and the solenoid actuator 28 to release the housing all of which places the fiber feed rollers 26, the picker 33 and the spinning turbine back into action, even while the thread reverses.
  • an adjustable impulse generator 37 which is driven by the common drive 5 closes and begins producing a series of impulses.
  • the fiber fed from the feed rollers 26 is spun, in conventional manner by centrifugal action against the inner wall of the spinning turbine 9, and is drawn off from the so called binding or splicing point which is fixed within the general limits on the face of the spinning wall.
  • the constant path and distance over which cut thread 3 must be returned between the thread sensor 2 and the binding point of the spinning turbine can be compared with a multiple of impulses generated by the impulse, generator 37, which multiple can be prede' termined.
  • the control circuit is caused to energize a magnet 34 which lifts the latch 23 releasing the lever 16, which for all the preceding time was holding roller 4b against the drive roller 5.
  • roller 4b On release of lever 16 roller 4b is freed allowing the roller 4a to return into contact with the drive 5, thus placing the entire apparatus back into its normal production position as shown originally in FIG. 1.
  • the take-up roller 21 slips over the grooved drum l0, permitting the dancer arm 11 to rebuild adequate reserve yarn.
  • the dancer arm 11 also acts to simultaneously prevent the edge of the spool 21 from hardening which through the lateral deflection of the thread relative to the winding of the spool. By taking up the thread, the dancer arm relieves the pressure which would accur at the edges of the spool due to the greater distance of the edges from the rollers 4a, 4b by yieldably moving to the left in the drawings.
  • the brakes 17 and 18, as well as the magnetically operated latch 23, are auxilliary means to insure the operation of the device, particularly, the levers within a time range of milli-seconds. These elements known may be omitted, if the actuator solenoid device 19 can be found which itself operates in an extremely short period of time. It is also to be noted that the belt or chain 14 connecting the drive of the rollers with the grooved drum 10 is held under proper tension by tensioning roller resiliently spring biased, to compensate for the changes in distance during the swing of roller 14.
  • the inventive method and apparatus provides extremely short periods of switching times.
  • the time in which the pull rollers are actually stopped is extremely short and virtually instantaneous.
  • the parts have relatively small size and mass and the clamping point of the thread between the two rollers 4a and 4b, as defined by the associated levers, having a common pivotal point, is easily determined. Consequently, irregularities in starting and stopping of the drive means for withdrawing and reversing the thread have little effect on the proper alignment.
  • the fact that the cut thread end arrives at the sensor, only after the drive means have reached peak power and have stabilized insures that the impulses generated are an accurate time indication of the distance the thread travels.
  • the present device insures that the tip of the thread reverses in time so that it meets exactly the binding point of the fiber ring or fiber tow formed in the spinning chamber.
  • the thread end is cut at a predetermined distance from the spinning chamber and its reversal is timed with the reactivation of the spinning operation, (i.e., feed and turbine spin) so that the thread reaches the chamber just as the spun fiber makes a cohesive, fully dense rope or tow at the chamber binding point.
  • the joining of the thread and fiber makes a smooth continuous and nearly perfect thread juncture.
  • This timing is, of course, accomplished by the fact that the counting of the impulses begins only when the cut thread passes the sensor, and not at the time it reverses.
  • the impulse counter could be comprised of one or more of the well known'counting relais.
  • the impulse counter could be comprised of one or more of the well known'counting relais.
  • suitable amplifiers are connected between the counting device of the pulses and its associated devices, e.g., solenoid switches in the control device.
  • a method for rejoining a broken thread with the spinning fibers in a spindleless spinning machine having a chamber to which the fibers are fed, a turbine for spinning said fibers and means for withdrawing said fibers comprising the steps of sensing the movement of said withdrawn thread, producing a first signal responsive to a break in said thread, and in response to said signal initiating an automatic program for sequentially stopping the withdrawal of said thread, cutting a portion from the end of said thread, reversing the movement of said thread to said chamber, producing a second signal responsive to the reverse movement of said cut end, producing a series of impulses in response to said second signal, and after a predetermined number of said impulses recommencing the withdrawal of said thread.
  • the method according to claim 2 including the step of arresting the spinning and feeding of fibers in response to the first signal and recommencing the spinning and feeding thereof in response to said second sig nal.
  • a spindless spinning machine comprising a chamber, means for feeding fibers to said chamber, a rotating turbine located in said chamber, for spinning said fibers into thread and means for withdrawing said thread, means for sensing said withdrawn thread, means for producing a first signal responsive to the sensing of a break therein, means responsive to said first signal to sequentially stop said withdrawing means, means for cutting a portion from the end of said thread and means for causing said withdrawing means to reverse and return said cut thread to said chamber for joining with said spinning fibers, said cut thread being moved past said sensing means, means for producing a second signal in response to the reverse movement of said cut thread past said sensing means, said sensing means producing a predetermined number of impulses in response to said second signal, and said withdrawing means being responsive to the last of said predetermined number of impulses to again reverse said withdrawing means to recommence withdrawl of said joined thread from said chamber.
  • the means for withdrawing a returning said thread comprises a pair of rollers each mounted on a lever resiliently biased against each other to hold the thread therebetween, said rollers having the same diameter, a drive roller continuously rotating in one direction, and means normally maintaining one roller in sole contact with said drive roller for selectively withdrawing said thread and shifting the other roller into sole contact with said drive roller for reversing said thread.
  • the apparatus according to claim 6 including an impulse generator mechanically connected to said drive means for producing a steady stream of reference impulses.
  • the apparatus according to claim 6 including a control circuit responsive to said first signal, a control actuator for moving said levers, said circuit providing a signal for said actuator.
  • the apparatus according to claim 6 including a thread take-up spool and a thread guide drum interposed between said rollers and said thread take-up spool, said spool resting on said guide drum and being driven thereby, and transmission means connecting said guide drum with said rollers for conjoint rotation.
  • the apparatus according to claim 9 including a dancer arm for taking-up thread responsive to the pull on said thread, located between said rollers and said guide drum.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US00264527A 1971-06-21 1972-06-20 Method and apparatus for joining broken ends Expired - Lifetime US3854274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712130690 DE2130690A1 (de) 1971-06-21 1971-06-21 Verfahren und Vorrichtung zum Wiederanspinnen eines gebrochenen Fadens in einer Offen-Ende-Spinnvorrichtung

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US3854274A true US3854274A (en) 1974-12-17

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US00264527A Expired - Lifetime US3854274A (en) 1971-06-21 1972-06-20 Method and apparatus for joining broken ends

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US (1) US3854274A (de)
JP (1) JPS5124606B1 (de)
CH (1) CH549652A (de)
CS (1) CS207316B2 (de)
DE (1) DE2130690A1 (de)
GB (1) GB1391211A (de)
IT (1) IT960677B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3952491A (en) * 1974-06-20 1976-04-27 Sharychenkov Alexandr Alexeevi Open-end spinning frame
US4059946A (en) * 1974-12-07 1977-11-29 Fritz Stahlecker Method and apparatus for start-spinning a thread on open-end spinning units
US4078369A (en) * 1975-12-06 1978-03-14 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Maintaining supply of fiber material for textile spinning machines
US4114356A (en) * 1976-08-05 1978-09-19 Zinser Textilmaschinen Gmbh Open-end spinning apparatus
US4132056A (en) * 1975-12-23 1979-01-02 Schubert & Salzer Open end spinning apparatus
US4156341A (en) * 1975-04-24 1979-05-29 W. Schlafhorst & Co. Apparatus for monitoring sliver feed in a spinning machine
US5586427A (en) * 1994-09-03 1996-12-24 Rieter Ingolstadt Spinnereimaschinenbau Ag Device for adjusting the contact pressure of a pressure roller against the draw-off shaft of a rotor spinning machine

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2221316B1 (de) 1972-04-29 1973-09-13 Skf Kugellagerfabriken Gmbh Vorrichtung zum Zwischenspeichern einer ueberschuessigen Fadenlaenge an einer Offen-End-Spinnmaschine
CH610019A5 (de) * 1976-11-11 1979-03-30 Battelle Memorial Institute
CS200910B1 (en) * 1978-04-21 1980-10-31 Karel Mikulecky Method of and apparatus for spining-in yarn in open-end rotor spinning unit
DE2850729C2 (de) * 1978-11-23 1986-03-13 W. Schlafhorst & Co, 4050 Mönchengladbach Verfahren und Vorrichtung zum Anspinnen eines Fadens
DE3202428C2 (de) * 1982-01-26 1986-06-05 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Verfahren und Vorrichtung zum Anspinnen eines Fadens in einer Offenend-Spinnvorrichtung
GB2140042B (en) * 1983-05-20 1988-06-08 Rieter Ag Maschf Open-end yarn piecer
GB2178069B (en) * 1983-05-20 1988-06-08 Rieter Ag Maschf Open-end yarn piecer
US5353582A (en) * 1988-04-14 1994-10-11 Rieter Machine Works, Ltd. System for controlling the movement of an elongated textile structure

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354631A (en) * 1964-04-20 1967-11-28 Vyzk Ustav Bavlnarsky Method and apparatus for preventing interruption of a spinning process during breakage of the spun thread
US3455095A (en) * 1967-09-26 1969-07-15 Tmm Research Ltd Spinning of textile yarns
US3462936A (en) * 1965-12-01 1969-08-26 Vyzk Ustav Bavlnarsky Stop motion for open end spinning machines
US3541774A (en) * 1968-01-25 1970-11-24 Elitex Zavody Textilniho Control apparatus for starting,stopping,and priming a spinning machine
GB1213302A (en) * 1966-11-08 1970-11-25 Rieter Ag Maschf Improvements relating to the back feeding of yarn to spinning machines
US3640059A (en) * 1968-10-17 1972-02-08 Elitex Zavody Textilniho Method of spinning-in yarn upon interruption of the spinning process in spindleless spinning machines and device for performing said method
US3695017A (en) * 1969-03-15 1972-10-03 Daiwa Spinning Co Ltd Automatic yarn piecing apparatus for spindleless spinning machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354631A (en) * 1964-04-20 1967-11-28 Vyzk Ustav Bavlnarsky Method and apparatus for preventing interruption of a spinning process during breakage of the spun thread
US3462936A (en) * 1965-12-01 1969-08-26 Vyzk Ustav Bavlnarsky Stop motion for open end spinning machines
GB1213302A (en) * 1966-11-08 1970-11-25 Rieter Ag Maschf Improvements relating to the back feeding of yarn to spinning machines
US3455095A (en) * 1967-09-26 1969-07-15 Tmm Research Ltd Spinning of textile yarns
US3541774A (en) * 1968-01-25 1970-11-24 Elitex Zavody Textilniho Control apparatus for starting,stopping,and priming a spinning machine
US3640059A (en) * 1968-10-17 1972-02-08 Elitex Zavody Textilniho Method of spinning-in yarn upon interruption of the spinning process in spindleless spinning machines and device for performing said method
US3695017A (en) * 1969-03-15 1972-10-03 Daiwa Spinning Co Ltd Automatic yarn piecing apparatus for spindleless spinning machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3952491A (en) * 1974-06-20 1976-04-27 Sharychenkov Alexandr Alexeevi Open-end spinning frame
US4059946A (en) * 1974-12-07 1977-11-29 Fritz Stahlecker Method and apparatus for start-spinning a thread on open-end spinning units
US4156341A (en) * 1975-04-24 1979-05-29 W. Schlafhorst & Co. Apparatus for monitoring sliver feed in a spinning machine
US4078369A (en) * 1975-12-06 1978-03-14 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Maintaining supply of fiber material for textile spinning machines
US4132056A (en) * 1975-12-23 1979-01-02 Schubert & Salzer Open end spinning apparatus
US4114356A (en) * 1976-08-05 1978-09-19 Zinser Textilmaschinen Gmbh Open-end spinning apparatus
US5586427A (en) * 1994-09-03 1996-12-24 Rieter Ingolstadt Spinnereimaschinenbau Ag Device for adjusting the contact pressure of a pressure roller against the draw-off shaft of a rotor spinning machine

Also Published As

Publication number Publication date
JPS5124606B1 (de) 1976-07-26
CS207316B2 (en) 1981-07-31
IT960677B (it) 1973-11-30
DE2130690A1 (de) 1972-12-28
CH549652A (de) 1974-05-31
GB1391211A (en) 1975-04-16

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