US3879926A - Method and apparatus for controlling the rejoining of thread in an open ended spinning machine - Google Patents

Method and apparatus for controlling the rejoining of thread in an open ended spinning machine Download PDF

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Publication number
US3879926A
US3879926A US384412A US38441273A US3879926A US 3879926 A US3879926 A US 3879926A US 384412 A US384412 A US 384412A US 38441273 A US38441273 A US 38441273A US 3879926 A US3879926 A US 3879926A
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Prior art keywords
spinning
thread
turbine
signal
housing
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US384412A
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English (en)
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Gerhard Bartling
Michael Vonronai-Horvath
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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
    • D01H4/42—Control of driving or stopping
    • D01H4/44—Control of driving or stopping in rotor spinning

Definitions

  • ABSTRACT Method and apparatus for the rejoinder of a broken thread in an open end spinning unit.
  • the thread is formed from fibers fed to a rotating spinning turbine and withdrawn therefrom to a winding device.
  • the continuity of the withdrawn thread is sensed and a signal provided on interruption thereof.
  • a control mechanism responsive to the signal is provided for establishing a predetermined sequence of operation of said spinning unit for rejoining the thread.
  • the turbine is movably mounted, so that the control unit on receipt of a signal first shifts the turbine from a working position into a position where spinning is arrested and to thereafter initiate the rejoinder operation and maintain the operation for a predetermined time interval to complete said sequence.
  • the control mechanism may be provided for individual or a plurality of units. Other sensing means monitoring the operation of the turbine are included.
  • the present invention relates to a method and apparatus for the spindleless spinning of yarn and threads and particularly to a method and apparatus for the operation and control of the steps necessary to rejoin the thread and recommence spinning after a thread breakage.
  • fibers are picked from a roving or sliver by a picker wheel and fed to a spinning turbine where, under centrifugal action, the fibers are spun into the thread.
  • the thread is pulled by a winding device and deposited on a spool or cone. Frequent thread or yarn breakage occurs as the thread is being pulled.
  • a monitoring device employing a sensor is arranged adjacent the moving thread to determine the threads continuity. The sensing of a break in the thread causes the monitoring device to produce a signal which actuates a control mechanism setting into operation a sequence of steps which stops the fiber feed, spinning, and the other operations to permit the thread to be then rejoined so that operation can be recommenced.
  • the above mentioned devices have an even greater drawback in that they do not take into account and do not sense the cause of the initial thread breakage. While the devices are capable of rejoining the thread at predetermined points they make no effort whatsoever to determine and eliminate the cause for the actual breakage and the cause for subsequent breakage. In this way damage may occur to various parts of the spinning devices as a whole particularly when multiple spinning devices are arranged in a single bank so that common drive mechanisms are employed for the spinning turbines, picker rollers, etc. for each of the individual units. In general these drive devices are allowed to continue to remain in contact with the spinning chamber and picker rollers, etc. and to be reactivated even though the fault causing the thread break has not been eliminated.
  • the control device may initiate the rejoinder operation at any stage of the knitting process so as to eliminate the repetition of steps which have already been completed and thus effectively simplify the rejoinder operation.
  • a method and apparatus for the control of the rejoining operation of the thread in an automatic spindleless spinning machine is obtained by locating the spinning turbine so that it may be selectively moved into and out of a working position in which the fibers fed to it are spun into a thread and from which the thread is continuously withdrawn. An interruption of the withdrawn thread is sensed and a signal is produced which is fed to a control mechanism which is capable of setting into motion a predetermined sequence by which the spinning turbine is moved out of its working position and the sequence of rejoining the thread is initiated, maintained and terminated by operation in whole or in part of the rejoining cycle.
  • the method and apparatus of the present invention permits the rejoining of the thread to be actually performed either automatically by suitable mechanisms attached to the spinning unit or manually by the hand operator.
  • Each of the spinning units is provided with means for independently and individually moving its turbine out of engagement with its drive means independently of the operation of the other units in the bank and preferably first stopping the picker roller and the supply of fibers to the turbine and then after a time lag actually stopping and arresting the spinning chamber.
  • the common control mechanism actuates the movement of the spinning turbine out of working position stopping the fiber feed and arresting its rotation.
  • the spinning unit remains in this shut down position so that the operator may perform by hand the cleaning of the turbine and the rejoining of the thread with the spun fiber.
  • the spinning unit may then be returned either by the common or central control means or by hand to its working position and the spinning unit be returned to its automatic working.
  • the automatic operation can be effected after the arrival of a signal from the sensing device to the control mechanism.
  • the control mechanism automatically shifts the spinning turbine into its intermediate position where it is disengaged from its drive means and subsequently activates a cleansing mechanism whereby the interior chamber of the spinning 'turbine is cleansed.
  • the control mechanism may pass a signal to an indicating device which indicates that the spinning device is ready forthe subsequent steps of the rejoining operation.
  • the spinning turbine remains in its closed down or open intermediate position making it possible to carry out the actual rejoining operation with the required reverse movement of the thread and the subsequent rewinding by hand with the spun fiber in the spinning turbine.
  • the recommencement of the fiber feed to the spinning chamber and the restarting of the spinning turbine to working speed can be then carried out in the well known manner upon the return shifting of the spinning device into engagement with the drive means.
  • the present invention also permits the fully automatic rejoinder of the thread after a break has occurred.
  • the control mechanism may be advantageously designed so that after the arrival of a fault signal from the sensing device, the movement of the spinning turbine from its working position into its disengaged position, the subsequent cleansing of the spinning chamber, and a single or repeated movement of the spinning turbine from its disengaged position into its working position can be automatically effected simultaneously with the reversing of the already spun thread and the rejoinder of its end to the thread being spun in the chamber of the spinning turbine.
  • These operations can be commenced, carried out and terminated in a predetermined sequence at predetermined intervals either from the beginning of a cycle or from any point within the cycle.
  • the sequence of stages of the rejoining operation be carried out by the controlled mechanism in a predetermined sequence and at predetermined intervals, which may be repeated in a predetermined num her until the broken thread is joined.
  • the spinning turbine is shifted into its open or intermediate position out of engagement with its drive means and is allowed to remain in this intermediate position, producing a single being passed to an indicating device capable of being seen by the operator.
  • the continuing cause creating the thread breakage and preventing the proper rejoinder of the thread can be determined by the operator and rectified before damage is done to any individual components of the individual components of the spinning unit.
  • each of the spinning turbines is located in a pivotable housing which housing can be moved into a working position where the spinning turbine engages its drive means and an intermediate position wherein the spinning turbine disengages from the drive means.
  • the individual control element is actuated by a pulse received from the common control mechanism which is coordinated to each of thespinning unit.
  • the open end spinning machine comprising a plurality of spinning units can be provided with a common control element and several monitoring devices which are then connected in a coordinate manner with the control mechanism.
  • the control element which activates the shifting or movement of the housing locating the spinning turbine is preferably electrically controlled through an impulsive derived from the control mechanism.
  • the control element may be a mechanical, pneumatic, hydraulic motor such as a piston or cylinder or an electrical component such as a solenoid or the like which would have an arm capable of moving the housing or spinning turbine as a compact unit into its corresponding working and intermediate inactive positions.
  • the working and inactive positions are defined by limit switches which are connected to the common control mechanism provide coordinated operation of the other elements of the operating cycle.
  • each of the spinning units with a monitoring device sensing the continuity of the finished thread but to a second monitoring device acting independently of it to sense the speed and/or temperature at which the spinning turbine and the picker roller op erates.
  • Both sensing devices are connected to the common control mechanism so that by such an arrangement should the sensing device monitoring the travel of the thread break down, or if in the path of the spun thread no fault or defect would be indicated, the monitoring device connected to the spinning turbine or the picker roller sensing its speed and/or temperature would report a corresponding signal to the control mechanism. In response to this signal the spinning turbine would be caused to move out of its working position and to its intermediate position wherein spinning is arrested. In this intermediate position of the spinning turbine and the picker roller are both separated from their driving components so that the fault or defect causing the continual misoperation of the spinning unit can be determined and rectified.
  • the sensing device monitoring the path of the thread can be connected via a first priority circuit with the control mechanism so that primarily the signal derived from a broken thread is passed to the common control mechanism without interference from the signal derived from the second sensing device and that the signal derived from the second sensing device would be passed to the common control mechanism in a coordinated manner only after the elapse of a certain interval or a certain number of attempts at automatic rectification of the broken thread.
  • the input of the common control mechanism is derived from the individual sensing devices or control elements monitoring each of the individual spinning units.
  • the control mechanism includes as its components a plurality of timers, switch mechanisms, circuits, and indicating devices with connecting leads so as to bring about an output which is the function of the thread sensing devices, the control elements, and the varying other parameters of the individual spinning units as well as the predetermined sequence of stages and events at any given moment relating to the program for rejoining broken threads, as well as whether such program stages are completed.
  • the common control mechanism can be connected simultaneously with several spinning units so that the time required to obtain the rejoinder of the threads in two or more spinning units can be greatly reduced.
  • the single control mechanism being capable of monitoring several devices simultaneously and receiving signals occurring simultaneously or within a relatively short period from each unit will provide an output command signal to several units simultaneously or within a predetermined period of time less than the time necessary to effect the rejoinder of the thread in any one spinning unit.
  • the rejoinder of thread in any individual spinning units may be initiated, maintained and terminated from any point in the spinning operation and in sequences which can be commenced simultaneously or with overlapping time intervals or from preset predetermined.
  • the control mechanism is provided with an input from a measuring point scanner or stepping circuit.
  • This latter circuit receives signals from each of the sensing, monitoring and control devices of each spinning unit and successively scans the signal lead lines as a function of a timing element.
  • the scanner passes a further signal pulse to a set of logic circuits by which the cyclic onward stepping of the measuring point scanner, in the presence of a fault signal, is interrupted for a given interval.
  • the logic circuit simultaneously activates a set of timers and switch mechanisms to set or command into motion the specific steps of the rejoinder operation in the corre sponding spinning unit from which the fault signal is derived via a connecting lead from the output side of the control mechanism. Thereupon, thescanner may again be stepped to determine a fault in another spinning unit, and the command signal relative to it may be created.
  • Logic circuits are preferred in order to avoid the unnecessary actuation of the timers and switch mechanisms of the control mechanism and thus the triggering of a subsequent command for initiation of the rejoinder operation during the period in which the initial signal has activated an initial rejoinder sequence.
  • the logic circuits store the fact that a spinning unit is under a rejoinder operation even if the scanner, on a successive sweep, senses the continued presence of a fault. This allows the carrying out of a single rejoinder cycle as a. result of only the first and initial report of a thread breakage.
  • the logic circuits to provide economy and simplicity, have only a finite number of command arrangements or circuits so that in the event a predefined number of spinning units are simultaneously engaged in the rejoinder operation, the further cyclical shift of the measuring point scanner will be interrupted. So long as all sets of the timers and switch mechanisms in the control mechanism are thus activated, the scanner will store the fault signal of the next spinning unit so that interference with the course of the thread rejoinder of the preceding units is avoided. Once a preceding spinning unit is cleared, the scanner will be stepped and shifted to resume the above operation.
  • FIG. 1 is an elevational view of a spinning machine showing a plurality of spinning units in bank
  • FIG. 2 is a side elevational view of a single spinning unit of the machine shown in FIG. 1 in working position
  • FIG. 3 is a view similar to FIG. 2 showing the spinning unit in intermediate open or disengaged position
  • FIG. 4 is an enlarged sectional view of an individual spinning unit in working position
  • FIG. 5 is a view similar to FIG. 4 showing the individual spinning unit in its intermediate disengaged position, and with the cover of the unit fully open showing access, therein,
  • FIG. 6 is a front elevational view of the upper portion of the spinning unit shown in FIGS. 4 and 5,
  • FIG. 7 is a sectional view taken along lines 7-7 of FIG. 6,
  • FIG. 8 is a view of a spinning unit similar to that of FIG. 2 showing a modified form of the device
  • FIG. 9 is an enlarged view of the spinning unit partially in section showing the modification of FIG. 8,
  • FIG. 10 is a circuit diagram of the control mechanism for the spinning unit according to FIG. 8.
  • the spinning machine to which the present invention is directed comprises a plurality of spinning devices mounted in uniform spaced relationship on a machine frame 1.
  • Each of the individual spinning devices comprises a spinning unit 2 mounted above a container 3 from which a roving or silver 4 of fibers are withdrawn by a feed device 5.
  • the feed device 5 comprises a picker roll 6 which picks at the end of the silver and dissolves the silver into a plurality of descrete fibers.
  • the picker roller 6 releases the fibers and passes them via a duct 7 into the interior chamber of the spinning turbine 8 where they are then twisted and spun together in the form of a thread 4a which is drawn off from the spinning turbine by a device 9 to a winding mechanism 10 to be wound upon a cylindrical or conical core as may be desired.
  • a sensing mechanism 11 which monitors the continuity of the thread 4a.
  • the spinning turbine 8 and the feeding device 5 are commonly mounted as a unit and frequently referred to as the spinning unit per se.
  • Each of the feeding devices 5 comprises a pair of nip rollers which clamp the sliver 4 and pass it at a predetermined speed to the picker roller 6.
  • the picker roller 6 and the spinning turbine 8 are driven via tangentially arranged driving belts 16 and 17 which are driven by a motor (not shown) via pulleys 18 and 19 (see FIG. 1
  • the belts l6 and 17 are adapted to engage shaft extensions 20 and 21 of the picker roller 6 and the spinning turbine 8 respectively. In this manner all of the spinning units are actuated simultaneously and in unison with each other.
  • the drawing off of the finished thread 4a takes place by means of the drawing off device 9 which comprises a delivery roller 9a passing lengthwise through the machine and a pressure roller 9b which is adapted to be pressed upon it.
  • the drawing off device 9 is spaced from the spinning unit 2, the thread 4a being withdrawn or pulled by the respective rollers 9a and 9b to the winding device 10.
  • the winding device 10 comprises a driven roller which is provided with means serving to guide the thread in a helical pattern.
  • the thread is wound on a yarn package 10a which freely rests on the roller pulling the thread so as to be movable conjointly with it.
  • the yarn package is slidably mounted on a lever support 22 which is pivoted in a bearing 23 rigidly fixed on the top of the machine.
  • Each of the spinning units 2 as seen in FIG. 3 is provided with a sensing device 11 through which the thread 4a is drawn.
  • the sensing device 11 comprises a feeler 11a or similar sensing device, which is connected by a line 24 with a control mechanism 25 mounted in association with the individual spinning unit 2.
  • the magnetic clutch coupling .14 which controls the operation of the sliver feed rollers 5 is connected via a line 26 to the output of the control mechanism 25.
  • Mounted adjacent the spinning unit 2 is an actuating member 27 which is connected via line 28 to the control mechanism 25. Since each spinning unit 2 is provided with a control mechanism 25 and its associated sensing devices and actuator mechanisms the stopping of the spinning operation of the unit can be relatively quickly obtained in the event of a broken thread.
  • the impulse to the coupling 14 is timed to be slightly ahead of the impulse to the actuator 27 so that the movement of the sliver 4 is interrupted before the spinning unit '2 is opened.
  • the spinning unit can be cleaned either by hand or by automatically and rejoinder of the thread 40 to the fibers in the spinning turbine can also be made either by hand or automatically.
  • the spinning unit comprises a base housing part 2a pivotally mounted by a bolt 29 to the frame 1 of the machine.
  • the base housing part 2a mounts the bearing housing 8a of the spinning turbine as well as the bearing housing 6a for the picker roller 6.
  • the details of the bearing housings and the bearings as well as the rollers and of the spinning turbines are omitted for the sake of clarity since they are in fact conventional and common in this art.
  • the actuator 27 is mounted at the upper end of the frame 1 and comprises a conventional pneumatic or hydraulic piston and/or electrically operated solenoid.
  • the actuator includes a piston 30 from which extends a shaft 30a adapted to act against the rear surface of the base 2a.
  • a switch 31 Interposed in the line 28 from the control mechanism is a switch 31 which may be in the form of a magnetic hydraulic or pneumatic device depending upon the control element 27.
  • the valve switch 31 causes the piston to move the ram 30a outwardly against the base 2a pivoting the base 2a about the pivot pin 29 from the position shown in FIG. 4 to the intermediate position shown in the solid lines of FIG. 5.
  • the upper end of the base 2a is provided with a bolt 32 passing freely through the base 2a and fits into the machine frame 1.
  • a spring 33 surrounds the bolt 32 and normally biases the base 2a into the closed position shown in FIG. 4. The actuation of the actuator element 27 shifting the base 2a as seen in FIG. 5 takes place against the normal bias of the spring 33.
  • the housing of the spinning unit 2 is provided with a cover 2b which is also pivoted about the pin 29 fixed to the lower end of the machine frame.
  • This cover 2b is swingable with respect to the base 2a into the position shown in the dotted lines in FIG. 5 by manually operating a locking device generally depicted by the elements 2c through 2i which activates a coupling connecting the housing cover 2b and the housing base 2a.
  • the coupling 35 comprises a two armed lever pivoted to the base 2a.
  • the two armed lever has one of its arms 35a forked or slotted.
  • the forked arm receives between its shanks a bolt 36 which is attached to the cover 2b.
  • the arm opposite the forked arm of the two armed lever 35 is provided at its end with a roller 37 which is adapted to bear against the machine frame.
  • a roller 37 which is adapted to bear against the machine frame.
  • the means for locking the cover 2b to the housing part 2a is shown in FIGS. 6 and 7.
  • the means comprises an extension'2c connected to the cover 2b which is accessible to the machine operator.
  • a bar 2f which is pivotally mounted about a bolt 2d and is biased by a spring 2e.
  • the bolt 2d is arranged substantially parallel to the rotating shaft of the spinning turbine 8.
  • the bar 2f is provided with a hole 2g through which the slotted head 2h of a rotatable bolt 2i extends.
  • the bolt 21' is fixedly attached by a set screw to the base 2a of the housing of the spinning unit.
  • the spring 2e normally biases the bar 2f to the left as seen in FIG. 6 so that the edge of its opening 2g fits within the slotted collar 2]: of the pin 2i.
  • the two armed lever 35 swings about the pin 34 causing the roller 37 to engage the bearing surface of the machine frame 1 thus instigating the shifting and pivoting outwardly of the base member 2a. Since the spinning turbine 8 and the picker rollers 6 are mounted in bearings fixed to the base 2a these units also swing in a clockwise fashion as seen in FIG. 5 disengaging themselves from the surfaces of the tangential drive belts 16 and 17. "The arrangement is of such a nature that an opening of the cover 2b, movement of the spinning unit to its intermediate disengaged and inoperative position takes place at all times.
  • a braking member 38 is mounted spaced above the tangential belt 17 so that on swinging movement of the base 2a carrying with it the spinning turbine 8, the extension shaft 21 of the spinning turbine is caused to engage the braking member 38. Thus immediately upon opening of the spinning unit and placing the unit in its intermediate position the spinning turbine is braked.
  • the backward shifting of the cover 2b and base member 2a not only closes the cover 2b but also places the spinning units in their operative position.
  • the sliver feed device 5 On pivoting of the spinning unit 2 or its base housing portion 2a the sliver feed device 5 is also stopped since the formation of the thread 4a is interrupted.
  • the driving shaft 15 is detached from its drive shaft 12 by interruption of the coupling 14 through a signal derived from the control unit 25.
  • the spinning chamber 8 is positively braked by being forced against the brake pad 38 while the picking roller 6 will slowly rotate to a stop since it too is being lifted from the drive belt 16.
  • the shaft 21 of the spinning turbine 8 and the shaft 20 of the 'picker roller 6 are again forced against the driving belts 16 and 17 and accelerated to the predetermined speed of rotation necessary for the formation of the thread 4a.
  • rejoining of the thread 4a to the fibers being spun in the turbine 8 can be made manually.
  • a signal may then be forwarded to the control mechanism 25 to reengage the coupling 14 so as to supply the sliver 4 and the supply of fiber to the picking roller 6 so that sufficient fiber is fed to the spinning turbine to reform the thread.
  • the driving of the feed device and the rewinding of the thread 4a may be easily provided. If it is desired to provide for the automatic re.- joining of the thread the apparatus as depicted in FIG. 8 may be provided.
  • the spinning unit has a sensing device 11 which comprises a sensing element 11a which is preferably a photocell rather than the feeler of the previous embodiment and a cutting and clamping device which acts to hold the end of the broken thread and cut its end into square shape so that a proper rejoining splice can be made.
  • a sensing device 11 which comprises a sensing element 11a which is preferably a photocell rather than the feeler of the previous embodiment and a cutting and clamping device which acts to hold the end of the broken thread and cut its end into square shape so that a proper rejoining splice can be made.
  • Each of these spinning units is provided with a control mechanism 41) which is connected by lines 24 and 24a to the sensing head 11a and the cutting and splicing device of the sensor.
  • the control mechanism 40 is also connected to the actuating element 27 by the lead line 28.
  • the switch valve shown in the preceding embodiment may be used in this embodiment although it is not shown in FIG. 8.
  • a lead 26 passes from the control mechanism
  • the thread 4a is drawn off from the spinning turbine and passes through the sensing device 11. It is withdrawn by the driven roller 9a traversing the length of the machine in front of each of the individual spinning units.
  • a pressure roller 9b is caused to rest on the driven roller 9a with a predetermined pressure so as to pull the thread upwardly for feeding by the driven thread winding roller 10 onto the yarn package 10a.
  • the sensor lla of the sensing and monitoring device 11 produces a corresponding signal which is passed via the lead 24 to the control mechanism 40, by which both the deactivation of the coupling 14 and the activation of the control actuator 27 is initiated in the predetermined time sequence necessary to first stop the feeding of the sliver 4 and then opening of the spinning unit 2 by pivoting of the base 2a into the position corresponding to that shown in FIG. 5. Simultaneously a signal is developed which controls a carrying arm 41 which carries a pressure roller 90 adapted to press the thread 4a against the roller 9b.
  • the rollers 9b and 9c have substantially the same diameter.
  • the signal is forwarded to a solenoid type actuator 42 which is connected to the carrying arm 41 .via a lead 43 connected to the control mechanism 40.
  • the carrier arm 41 causes the pressure roller 9c to move the first pressure roller 9b from engagement with a driven roller 9a so as to stop the movement of the thread 4a.
  • a braking device may be used at this time to stop the movement of the rollers 9b and 9c.
  • the pair of rollers 9b and 9c is stopped a position is reached in which neither of the rollers 9b or 90 rest on the driven rollers 9a.
  • the driven roller 9a continues to revolve however. At this point the movement of the thread 4a has been braked and the opened in the position shown in dotted lines as seen in FIG. 8.
  • the interior of the spinning unit may be cleansed and the cause of the break rectified.
  • Reversal of the thread to the spinning chamber occurs by moving the pair of rollers 9b and 9c which is holding the thread 4a between them by the lifting or actuating device 42 which is connected by the lead 43 through the control unit for a short time into a position in which the roller abuts against the driving roller 9a.
  • the roller 9c rotates counterclockwise to that of the first roller 9b and thus reverses the direction of the thread 4a.
  • the not shown brakev is of course released permitting the rotation of the roller 9c.
  • the thread 4a reverses itself and moves downwardly through the sensor mechanism 11 until it passes the sensing head 11a. On passing the sensor 11a a corresponding signal is produced to the control unit indicating the presence of a thread capable of being joined by the newly spun fibers.
  • roller 9b and the yarn winding roller 10 are jointly connected by a pulley and belt drive so that they rotate in the same direction.
  • the yarn winding roller 10 is also caused to operate in and revolve in the direction of winding.
  • a microswitch 44 Positioned next to the carrier arm 41 is a microswitch 44 which is activated upon the roller 9c reaching its full rewinding position.
  • the switch member 44 passes a signal via the line 45 to the control member 40 which then produces a signal to activate the aforementioned steps.
  • FIG. 9 an enlarged representation of the spinning unit 2 with the control mechanism 40 referred to in FIG. 8 is shown.
  • the sensing devices 46 and 47 are provided to monitor the position of the spinning turbine 8 and the picker roller 6. These monitoring devices 46 and 47 operate as a function of the temperature and/or speed of rotation of the picker roller 6 and the turbine and are provided with a common lead 48 to the control mechanism 40.
  • the circuit of the monitoring devices 46 and 47 are arranged such that it will only respond to a predetermined limiting value of the temperature and/or speed of the elements being sensed when the elements are in their working position or when the sensing device 11 has somehow failed in its own operation.
  • the circuit may contain built in timing delays, cycle counting delays and other techniques so that the indications sensed by the monitoring devices 46 and 47 will not interfere with the normal operation of the device heretofore described.
  • monitoring devices 46 and 47 ensures that, independently of the nature of the thread continuity sensing device which indicates the pressence of a thread, that the control mechanism 40 will act to pivot the spinning unit into its intermediate or open position whenever an unnatural occurrence exists preventing the rejoining of the thread. This precludes damage to the elements of the spinning unit by preventing the further fiber feeding into the spinning chamber when the spinning chamber itself is blocked or the picker roller 6 is jammed or blocked for example on account of excessive masses of fiber. Should this occur, one of the monitoring devices 46 and 47 will pass a signal to the control unit 40 via the lead 48 which will initiate the pivoting of the housing of the spinning unit 2 so as to place the spinning unit out of action.
  • the control mechanism 40 may have switch relays and time relays which may permit the rejoining operation to cycle repetitively for a predetermined number of times, for instance three times, before it will automatically open and disengage the spinning chamber 8 as described above. This permits the device a given number of attempts to be placed back into the working position and into production operation before the signals sensed by the monitoring devices 46 and 47 will finally put the spinning unit out of operation. When, however, this occurs a corresponding fault signal will be produced, visible or audible to the operator which will remain functioning until such time as the machine operator removes the cause creating the corresponding fault signal.
  • each of the spinning units 2 is provided with its own control mechanism 25 or 40.
  • the machine may be provided with a single common control unit.
  • the individual or common control unit is employed such a unit as would function in the embodiment of FIGS. 3 or 8 is diagramatically represented by the dot dash outline 40 in FIG. 10.
  • the control mechanism 40 comprises a circuit having at its input a measuring point scanner 49 or shift register, which is connected across a set of corresponding leads 1 through 200 with the inputs taken from the thread sensing device 11 and the temperature and speed monitoring devices 46 and 47 of each of the individual spinning units 2.
  • the circuit 40 is intended to receive signals from 200 individual open end spinning units. Each line 1 through 200 representing the input from a single unit.
  • the scanner 49 scans the connecting leads 1 to 200 cyclically in a repetitive manner for the presence of signals from the corresponding sensing and monitoring devices. It will be obvious that in the present specification what is meant by a signal from the thread sensing and monitoring devices is one which indicates either a thread breakage, or an operational fault such as an inordinate temperature or speed of rotation of the spinning turbine.
  • the repetitive cyclical operation of the scanner 49 is effected through the aid of a timing generator 50 via a first logic circuit 51 and an input line 52 connected to the scanner 49.
  • the scanner 49 If the measuring point scanner 49 which is moved cyclically by the pulses of the timing generator 50 intercepts a signal on one of the connecting leads to 200 which indicates the break ing of the thread or an operational fault, the scanner 49 furnishes a pulse over the lead 53 back to the logic cir cuit 51. This pulse blocks the subsequent output of pulses from the pulse generator 50 into the scanning device 49 and the scanning cycle is thus broken and remains in this state wherein the scanner and the input line 1 through 200 which it has intercepted in the position at the time of interception.
  • the measuring point scanner 49 controls, as may be seen from FIG. 10, a decoder 54 which has a plurality of inputs 1 through 200 corresponding in number and line to those in the scanner 49.
  • the decoder 54 is in turn connected with a second logic circuit 55 and passes to this second logic circuit the control border or command to connect one of the 200 connecting leads 201 to 400 leading to the individual spinning devices corresponding to those numbered 1 to 200.
  • the logic circuit 55 receives outputs 56 through 60.
  • the pulse passed via the lead 53 from the measuring point scanners 49 to the first logic circuit 51 moreover results in a signal output from the logic circuit passing over the output lead 61 to a modulo-S-counter 62 which as a result of this counting pulse counts an additional step.
  • the counter 62 is connected to a second 1 out of 5 decoder 63 which produces a 1 out of 5 code.
  • the 1 out of 5 decoder controls one of the timing elements 64 through 68.
  • Each of the timing elements 64 through 68 is connected with one of the leads 56 through 60 which has already been indicated to be the inputs to the logic circuit 55 which circuit has the connecting leads 201 through 400 at its output.
  • the timer elements 64 through 68 are in addition connected via leads 72 through 77 to a third logic circuit 78, supplies a pulse to an output lead 79, returning to the first logic circuit 51 as soon as the switching operations described above have been completed provided that not all of the timing elements 64 through 68 have been joined to one of the output connecting leads 201 through 400.
  • the third logic circuit 78 is not permitted to have an output pulse.
  • the scanner 49 continues its cyclical scanning of each of the monitored signals from each of the 200 spinning units. If the next intersecting lead determined by the scanner 49 on which there is present a signal from one of the sensing or monitoring devices, is not the same as that previously found in the prior cycle (i.e., is from the same spinning unit, the switching operations described above in connection with the first, second and third logic circuits is repeated so that an output command or control signal can be produced on any one of 'the outputs 201 through 400. In this second operation the counter 62 moves a step forward and consequently the next one of the timing elements 64 through 68 becomes connected with the corresponding output of the control lead via the second logic circuit 55.
  • the scanner 49 meets with a spinning unit that is still controlled by one of the timing elements 64 through 68 (i.e., the spinning unit is still in the process of its rejoining operation) a signal is supplied by the second logic circuit 55 via a lead 80 back to the first logic circuit 51 preventing this logic circuit from furnishing, via the lead 61 a counting signal to the counter 62.
  • a signal is supplied by the second logic circuit 55 via a lead 80 back to the first logic circuit 51 preventing this logic circuit from furnishing, via the lead 61 a counting signal to the counter 62.
  • the third logic circuit 78 does not provide a signal to reinstitute the cycle of the scanner 49. However, as soon as one of the counting elements 64 through 68 become free such a pulse signal is given over lead 79.
  • the common or central control circuit provides, with only a small number of timing or control elements compared to the number of spinning units, in a very economical manner and by simple and accurate means the possibility of carrying out the control, initiation, maintenance and termination of the rejoinder operation of any one of the individual units of the textile spinning machine, from the moment when the thread snaps or breaks until that time in which the spinning device is again ready for further joining of the thread.
  • the circuit described above is to be only regarded as a practical example and an illustration only. Various modifications, changes and additions can be made by the technician and the specific elements chosen.
  • the control circuits may be suitably constructed of only mechanical relays or of only electrical components or on the other hand with a combination of both relays and electrical components of both mechanical solid state and vacuum tube design. It must be furthermore pointed out that with the use of a common or central control unit, as has been described in detail above the outlay on circuitry is comparatively low. The result of which is that only one open ended spinning unit or a limited number of open ended spinning units can be prepared simultaneously for rejoining since the operation of the scanner 49 is inhibited as soon as a monitoring signal is intercepted.
  • the present circuit provides an integrated repetition circuit which brings about a repeated signal for the rejoinder operation cycle until the rejoining has been effected.
  • the spinning unit in which a thread is broken is retained out of order while a fault signal is continually furnished, untilthe fault is removed and the rejoinder operation completed.
  • the method for initiating the rejoinder of a broken a winding device comprising the steps of simultaneously sensing the continuity of the withdrawn thread and the operation of each of said picker mechanism and turbine, said sensing means providing signals on interruption of said thread and on sensing a fault in the operation of said picker mechanism and turbine, providing a control mechanism responsive to each of said signals for establishing a predetermined sequence of operation of said spinning unit, causing said control unit on receipt of a signal to shift the turbine from a working position into a position where spinning is arrested and said thread is broken and to thereafter initiate the rejoinder operation and maintain said operation for a predetermined time interval to complete said sequence.
  • An open end spinning machine comprising frame, a housing pivotally mounted on said frame having means for automatically moving said housing between a closed working position and at least a partially open position, a spinning unit located in said frame comprising a rotatable turbine and a rotatable means for feeding fibers to said turbine to be spun into a continuous thread, a tangential belt drive means mounted on said frame for rotating each of said turbine and feed means, said turbine and said feed means having a drive shaft extending therefrom engageable and disengageable with said belt drive means on closing and at least partially opening of said housing with respect to said frame, means for sensing the continuity of said spun thread, means for sensing a fault in the operation of each of said turbine and feed means, said sensing means respectively producing a continuity of signals on interruption of said spun thread, and a fault signal on determining a fault in said turbine and on determining a fault in said feed means, control means responsive to each of said signals to actuate said means for moving said housing to disengage the shaft of said turbine and feed means from said tangential belt
  • sensing means for said turbine and feed means is responsive to predetermined levels in speed of rotation and the temperature of said turbine and feed means.
  • the machine according to claim 3 including means for withdrawing said spun thread from said spinning unit, said control means being operable after interruption of the spinning of said fibers, to cause said means for withdrawing said thread to reverse the thread, and to actuate said means for moving said housing to close said housing with respect to said frame and thus cause the shafts of said turbine and feed means to engage said tangential belt and effect rejoinder of said thread with the spun thread.
  • said cover is pivotably hinged with respect to the housing and includes a coupling connecting said housing and cover, said coupling having means causing pivoting of said housing with respect to said frame to engage and disengage said turbine with the tangential belt on corresponding pivoting of said cover.
  • a spindleless spinning machine assembly comprising a plurality of spinning machines according to claim 3, wherein said control means is common to all said spinning units, said control means having means for receiving said signals from each of said spinning units, including a timing network, switch means and indicating devices associated with each spinning unit which in response to a given signal initially disengage the corresponding turbine from its 'drive means and initiate, effect and terminate in a predetermined sequence of operation of the corresponding spinning unit to effect rejoinder of said thread on receipt of said signal.
  • control mechanism includes a number of set timing networks, switch means, and indicating devices corresponding to the number of spinning units connected simultaneously thereto, and means for integrating each of said sets to selectively control the operation of several units simultaneously.
  • control mechanism includes a measuring point scanner, means connecting the output signal of said spinning unit individually to said scanner, said scanner cyclically scanning each of said output signals as a function of a timing pulse and producing a scanned output signal, a timer for producing said timing pulse, logic circuits responsive to the scanned output signal for interrupting the continued scanning of said measuring point scanner and for initiating the operation of series of timing relays and switch devices for performing the rejoinder operation of the correspondingly spinning unit from which said signal is derived.
  • said logic circuit including means for preventing subsequent output signals'from a given spinning unit from being scanned by said measuring point scanner during the rejoinder operation initiated by a previous output signal.
  • the machine according to claim 13 including means for interrupting the scanning of said measuring point scanner in the event a predetermined number of spinning units are subject to a rejoinder operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US384412A 1972-08-05 1973-08-01 Method and apparatus for controlling the rejoining of thread in an open ended spinning machine Expired - Lifetime US3879926A (en)

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DE19722238610 DE2238610B2 (de) 1972-08-05 1972-08-05 Offen-end-spinnvorrichtung

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US3879926A true US3879926A (en) 1975-04-29

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US (1) US3879926A (enrdf_load_stackoverflow)
JP (1) JPS5318609B2 (enrdf_load_stackoverflow)
CH (1) CH556400A (enrdf_load_stackoverflow)
DE (1) DE2238610B2 (enrdf_load_stackoverflow)
FR (1) FR2194808B1 (enrdf_load_stackoverflow)
GB (1) GB1439697A (enrdf_load_stackoverflow)
IT (1) IT991109B (enrdf_load_stackoverflow)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987610A (en) * 1973-12-04 1976-10-26 Fritz Stahlecker Method and apparatus for start-spinning a thread on an open-end spinning unit of an open-end spinning machine
US4033107A (en) * 1975-05-22 1977-07-05 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method and apparatus for controlling driving operation of 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
US4098066A (en) * 1975-12-02 1978-07-04 Fritz Stahlecker Open-end spinning machine
US4112659A (en) * 1975-12-06 1978-09-12 Fritz Stahlecker Open end spinning unit with a braking device
US4122655A (en) * 1976-05-18 1978-10-31 Platt Saco Lowell Limited Housing and mounting means for open end spinners
US4158284A (en) * 1976-12-23 1979-06-19 Teldix Gmbh Yarn quality monitoring apparatus
US4159616A (en) * 1978-01-19 1979-07-03 Kabushiki Kaisha, Toyoda Jidoshokki Seisakusho Method for controlling an open-end spinning frame and an apparatus therefor
USRE30201E (en) * 1973-12-04 1980-02-05 Method and apparatus for start-spinning a thread on an open-end spinning unit of an open-end spinning machine
US4972563A (en) * 1988-05-19 1990-11-27 Rieter Scragg Limited Yarn texturing machine
US5385009A (en) * 1992-08-07 1995-01-31 Rieter Ingolstadt Spinnereimaschinenbau Ag Process for piecing and cleaning in an open-end spinning device
US5572859A (en) * 1994-07-11 1996-11-12 Zinser Textilmaschinen Gmbh Individual-motor drive for spinning-machine spindle
EP3351664A1 (de) * 2017-01-24 2018-07-25 Maschinenfabrik Rieter AG Offenend-rotorspinnvorrichtung sowie verfahren zum betreiben einer offenend-rotorspinnvorrichtung
EP3351663A1 (de) * 2017-01-24 2018-07-25 Maschinenfabrik Rieter AG Verfahren zur wartung von spinnstellen einer spinnmaschine sowie spinnmaschine
US11866855B2 (en) * 2021-09-03 2024-01-09 Saurer Intelligent Technology AG Spinning position device with encapsulation

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2507153C3 (de) * 1975-02-19 1988-07-28 Stahlecker, Fritz, 7347 Bad Überkingen Verfahren zum Anspinnen eines Fadens bei Offenend-Spinnaggregaten und Offenend-Spinnmaschine zum Durchführen des Verfahrens
CS184560B1 (en) * 1976-04-21 1978-08-31 Karel Mikulecky Method of and apparatus for controlling devices in open-end spinning and like machines,for performing various operational steps
DE2732608A1 (de) * 1977-07-19 1979-02-01 Vnii Legkogo Textil Masch Einrichtung zum ringlosen spinnen
CS237190B1 (en) * 1983-09-13 1985-07-16 Jaroslav Dykast Apparatus for emergency inlet interruption of fibre material in spinning unit of spindleless spinning machine
DE3526305A1 (de) * 1985-07-23 1987-01-29 Zinser Textilmaschinen Gmbh Spinnmaschine
CS273548B1 (en) * 1989-01-25 1991-03-12 Hortlik Frantisek Automatic servicing device

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US3375649A (en) * 1965-11-16 1968-04-02 Vyzk Ustav Bavlnarsky Servicing arrangement for spinning machines
US3455097A (en) * 1967-06-01 1969-07-15 Vyrkumny Ustav Bavlnarsky Apparatus for spinning of fibrous material
US3492804A (en) * 1966-09-03 1970-02-03 Schubert & Salzer Maschinen Sensor-actuated strand clamping and strand return mechanism for spinning apparatus
US3511045A (en) * 1968-01-22 1970-05-12 Elitex Zavody Textilniho Spinning apparatus having a servicing position
US3680300A (en) * 1969-12-03 1972-08-01 Schubert & Salzer Maschinen Process and apparatus for fiber band spinning
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US3756007A (en) * 1970-06-18 1973-09-04 Skf Gmbh Spinning device for producing a filament from a fiber strip
US3760576A (en) * 1970-06-17 1973-09-25 Alsacienne De Constr Mecanique Spinning frame having bowl spindles
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JPS5136381B1 (enrdf_load_stackoverflow) * 1970-04-08 1976-10-08
DE2058602A1 (de) * 1970-11-28 1972-06-08 Schubert & Salzer Maschinen Steuervorrichtung fuer Textilmaschinen

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US3375649A (en) * 1965-11-16 1968-04-02 Vyzk Ustav Bavlnarsky Servicing arrangement for spinning machines
US3492804A (en) * 1966-09-03 1970-02-03 Schubert & Salzer Maschinen Sensor-actuated strand clamping and strand return mechanism for spinning apparatus
US3354626A (en) * 1966-09-26 1967-11-28 Cizek Leopold Method and apparatus for stopping and starting a spinning machine
US3685267A (en) * 1967-04-18 1972-08-22 Schubert & Salzer Maschinen Thread clamping,releasing,and feeding mechanism for spinning apparatus
US3455097A (en) * 1967-06-01 1969-07-15 Vyrkumny Ustav Bavlnarsky Apparatus for spinning of fibrous material
US3511045A (en) * 1968-01-22 1970-05-12 Elitex Zavody Textilniho Spinning apparatus having a servicing position
US3695021A (en) * 1969-10-13 1972-10-03 Tmm Research Ltd Textile spinning machines
US3680300A (en) * 1969-12-03 1972-08-01 Schubert & Salzer Maschinen Process and apparatus for fiber band spinning
US3760576A (en) * 1970-06-17 1973-09-25 Alsacienne De Constr Mecanique Spinning frame having bowl spindles
US3756007A (en) * 1970-06-18 1973-09-04 Skf Gmbh Spinning device for producing a filament from a fiber strip
US3760577A (en) * 1970-10-08 1973-09-25 Daiwa Spinning Co Ltd Method and apparatus for cleaning spinning chamber in ringless spinning machine
US3782089A (en) * 1970-11-28 1974-01-01 Schubert & Salzer Maschinen Apparatus for piecing-up yarn in an open-end-spinning device

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE30201E (en) * 1973-12-04 1980-02-05 Method and apparatus for start-spinning a thread on an open-end spinning unit of an open-end spinning machine
US3987610A (en) * 1973-12-04 1976-10-26 Fritz Stahlecker Method and apparatus for start-spinning a thread on an open-end spinning unit of an open-end spinning machine
US4059946A (en) * 1974-12-07 1977-11-29 Fritz Stahlecker Method and apparatus for start-spinning a thread on open-end spinning units
US4033107A (en) * 1975-05-22 1977-07-05 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method and apparatus for controlling driving operation of open-end spinning frame
US4098066A (en) * 1975-12-02 1978-07-04 Fritz Stahlecker Open-end 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
US4112659A (en) * 1975-12-06 1978-09-12 Fritz Stahlecker Open end spinning unit with a braking device
US4122655A (en) * 1976-05-18 1978-10-31 Platt Saco Lowell Limited Housing and mounting means for open end spinners
US4158284A (en) * 1976-12-23 1979-06-19 Teldix Gmbh Yarn quality monitoring apparatus
US4159616A (en) * 1978-01-19 1979-07-03 Kabushiki Kaisha, Toyoda Jidoshokki Seisakusho Method for controlling an open-end spinning frame and an apparatus therefor
US4972563A (en) * 1988-05-19 1990-11-27 Rieter Scragg Limited Yarn texturing machine
US5385009A (en) * 1992-08-07 1995-01-31 Rieter Ingolstadt Spinnereimaschinenbau Ag Process for piecing and cleaning in an open-end spinning device
US5572859A (en) * 1994-07-11 1996-11-12 Zinser Textilmaschinen Gmbh Individual-motor drive for spinning-machine spindle
EP3351664A1 (de) * 2017-01-24 2018-07-25 Maschinenfabrik Rieter AG Offenend-rotorspinnvorrichtung sowie verfahren zum betreiben einer offenend-rotorspinnvorrichtung
EP3351663A1 (de) * 2017-01-24 2018-07-25 Maschinenfabrik Rieter AG Verfahren zur wartung von spinnstellen einer spinnmaschine sowie spinnmaschine
US20180209077A1 (en) * 2017-01-24 2018-07-26 Maschinenfabrik Rieter Ag Method for Maintaining Spinning Units of a Spinning Machine along with a Spinning Machine
CN108342796A (zh) * 2017-01-24 2018-07-31 里特机械公司 开放式转子纺纱设备及其运行方法
US11866855B2 (en) * 2021-09-03 2024-01-09 Saurer Intelligent Technology AG Spinning position device with encapsulation

Also Published As

Publication number Publication date
DE2238610B2 (de) 1977-01-20
GB1439697A (en) 1976-06-16
CH556400A (de) 1974-11-29
DE2238610A1 (de) 1974-02-21
JPS5318609B2 (enrdf_load_stackoverflow) 1978-06-16
FR2194808B1 (enrdf_load_stackoverflow) 1976-05-07
FR2194808A1 (enrdf_load_stackoverflow) 1974-03-01
JPS4950227A (enrdf_load_stackoverflow) 1974-05-15
IT991109B (it) 1975-07-30

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