EP2128318A1 - Aufnahmevorrichtung - Google Patents

Aufnahmevorrichtung Download PDF

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Publication number
EP2128318A1
EP2128318A1 EP08009948A EP08009948A EP2128318A1 EP 2128318 A1 EP2128318 A1 EP 2128318A1 EP 08009948 A EP08009948 A EP 08009948A EP 08009948 A EP08009948 A EP 08009948A EP 2128318 A1 EP2128318 A1 EP 2128318A1
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EP
European Patent Office
Prior art keywords
take
yarn
motor
arm
force
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP08009948A
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English (en)
French (fr)
Inventor
Pär JOSEFSSON
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Iro AB
Original Assignee
Iro AB
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Filing date
Publication date
Application filed by Iro AB filed Critical Iro AB
Priority to EP08009948A priority Critical patent/EP2128318A1/de
Publication of EP2128318A1 publication Critical patent/EP2128318A1/de
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
    • B65H59/32—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged away from each other
    • B65H59/34—Surfaces movable automatically to compensate for variation in tension
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/347—Yarn brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a take-up device according to the preamble part of claim 1.
  • a take-up device for a yarn consuming textile machine has to take-up an excess yarn length in some operation cycle phases of the textile machine and to keep the stored excess yarn length taut with a certain force, e.g. while the yarn has and is relaxed.
  • the take-up device has to yield in other operation cycle phases when the yarn is stretched or pulled off by other components.
  • the take-up device has the function of keeping the yarn stretched with a certain force so that the yarn maintains a desirable geometrical configuration e.g.
  • the take-up device When the first rapier starts to accelerate into the weaving shed, the take-up device has to yield as quickly as possible and to pay out the stored yarn length in order to add as little additional tension to the tension in the yarn caused by the pulling action of the first rapier. Shortly before the first rapier reaches the middle of the weaving shed and starts to decelerate drastically to a stop, the take-up device again takes up the excess yarn length and stores this yarn length in stretched condition, such that the yarn transfer from the first rapier to the second rapier occurs as intended.
  • the take-up device again has to yield as quickly as possible, before the take-up device again has to take-up and store yarn close to the end of the insertion and after the deceleration of the second rapier to a stop.
  • the take-up device then has to keep the stored excess yarn length taut with a predetermined force until the next insertion starts in the same yarn channel.
  • the take-up device has to respond quickly to take up yarn when the yarn becomes relaxed, has to stretch the stored excess yarn length with a certain force, but also has to yield as quickly as possible when the yarn is pulled or stretched due to consumption by the rapier weaving machine.
  • the take-up arm is permanently loaded towards the second position by a pre-loaded spring constituting the turning force generator.
  • the spring biases the take-up arm such that the take-up arm deflects the relaxing yarn within the yarn path between the yarn guides and will store the excess yarn length with a force determined by the pre-load of the spring.
  • the yarn tension rises and the turning force generated by the spring overcomes such that the take-up device yields, until finally the take-up arm might reach the first position again.
  • the yarn does not only have to overcome the turning force of the spring but also the moment of inertia of the take-up arm.
  • US 7,275,291-A discloses a controlled yarn stretcher operating with pressurised air as a medium for achieving the take-up function.
  • the yarn path extends through a guiding tube.
  • Pressurised air is blown through the tube counter to the running direction of the yarn, when the take-up function is needed.
  • the pressure level of the pressurised air can be varied.
  • the pressure level of the pressurised air or the flow rate is varied in correlation with an operation cycle of the textile machine, e.g. a rapier weaving machine, such that the yarn stretcher does not influence the yarn run when the pulling off action already causes tension in the yarn.
  • the pneumatic yarn stretcher however, operates with several drawbacks.
  • pressurised air might cause serious changes in the yarn structure which changes cannot be tolerated for certain yarn qualities.
  • the pressurised air as the take-up medium acts with a delayed response both when starting and when terminating a take-up function.
  • pressurised air as the take-up medium has the big advantage that the pneumatic yarn stretcher is more forgiving than a purely mechanically acting take-up device, meaning that controlling the pneumatic yarn structure in correlation to an operation cycle of the rapier weaving machine does not need extremely high precision.
  • the motor be controlled to load the take-up arm with a force such that the intended take-up function will be achieved.
  • the force will be reduced at the same time or even before such that the yarn does not have to overcome the force and such that the take-up device yields either more easily or even without residual resistance.
  • the take-up device does not add any additional or undesirably high tension when there is tension in the yarn caused by consumption. There are two possibilities for varying the force.
  • the motor In the first case, the motor generates the force first in the direction necessary for the take-up function when a take-up function is needed, but generates a much lower force or no force at all when a take-up function is not needed any longer. This means that then the yarn has to overcome a much lower mechanical load of the take-up arm or only the load of the inertia of the take-up arm alone to e.g. return the take-up arm to the first position.
  • the turning force may be generated and varied bi-directionally, meaning that the yarn does not have to overcome any significant resistance of the take-up arm when starting to run off or when the yarn tension increases by means acting downstream of the take-up device.
  • the take-up device is taking up excess yarn length when the yarn relaxes, and keeps the yarn taut.
  • the mechanical load caused by the take-up arm becomes lower or practically zero such that then wear on the yarn is minimised and no additional undesirable yarn tension will be added to the yarn tension caused by the pulling off action or a stretching action by components of the yarn consuming textile machine downstream of the take-up device.
  • the force will be varied such that an optimum yarn control will be executed according to the operation cycle of the e.g. intermittently and/or irregularly operating textile machine.
  • the motor of the take-up device is an electric motor, a magnet motor, or a pneumatic motor, and either a rotary motor or a linear motor.
  • Such motor types allow to precisely control and vary the turning force or the linear force applied by the take-up arm on the yarn. Furthermore, these motor types even when generating a maximum turning force are able to yield at least partially like a spring.
  • the force of the motor will be varied between a maximum value and a value which at least substantially corresponds with a zero value force.
  • the maximum value suffices to either hold the take-up arm in the second position counter to the reaction force of the yarn or even at a stop defining the second position.
  • the force is reduced to zero, the yarn only has to overcome the inertia of the take-up arm when the take-up arm is to return to the first position and when a take-up function is no longer needed.
  • the force instead may be reduced only partially or according to a variably controlled force profile, e.g. if appropriate to achieve an optimised yarn control.
  • Another expedient embodiment uses a reversibly controlled motor.
  • the motor may return the take-up arm back in the direction to or even to the first position, when the yarn pulling off action starts, such that the yarn does not have to overcome any or very little mechanical load when the take-up arm is to be returned.
  • a reversible motor two different operational principles are possible. According to the first principle the motor will keep the take-up arm in the first position until a take-up function is needed, and then moves the take-up arm in the direction to the second position, and will bring back the take-up arm to the first position after termination of the take-up function.
  • the motor will hold the take-up arm with a certain force in the second position, as long as the external signal does not command the return of the take-up arm to the first position.
  • the force direction then is inverted, e.g. such that the arm return is executed according to a certain adjustable force or motion profile or without a significant mechanical co-action between the take-up arm and the yarn.
  • the force generated by the motor is varied and/or inverted in correlation with an operation cycle of the textile machine.
  • the take-up device then is controlled in adaptation to the operation of the textile machine and will carry out a take-up function exclusively when needed according to the respective and current operation cycle of the textile machine, and also will initiate or terminate each take-up function cycle in correlation with the course of the development of the operation cycle of the textile machine. This results in a precise adaptation of the operation of the take-up device to the operation cycle of the textile machine, such that no additional undesirable tension will be added to the yarn tension already built up in the yarn, and such that the tension in the yarn caused by a take-up function will precisely be matched with the requirements of functions occurring in the textile machine.
  • the motor is connected to a programmed electronic control device generating the external signal controlling the motor, the force value and the direction of the force.
  • the control device comprises a current value control circuit or is connected with a current value control circuit.
  • the magnitude of the force may be controlled directly proportional to the value of the current supplied to the motor.
  • a position sensor generating signals indicating the respective position of a driving motor component or of the take-up arm.
  • the position sensor is connected with the control device such that a closed regulation loop is constituted with a feedback control of the motor.
  • the electronic control device may be connected to a bus transmitting information e.g. of the rotary angle position of e.g. a main shaft of the rapier weaving machine.
  • the programming of the control device includes at least turning force values, e.g. as current values, and/or target take-up arm positions, respectively associated to selected rotary angle positions or rotary angle ranges of the main shaft.
  • the take-up device will execute each take-up function fully automatically and according to the programming.
  • such yarn consuming textile machines like a rapier weaving machine, comprise several yarn channels each equipped with a take-up device, according to an expedient embodiment the take-up devices in the several yarn channels are either connected to individual electronic control devices or to a common control device, both allowing to individually program each respective take-up device. This may be important in the case of different yarn qualities processed in the different yarn channels, because each yarn quality might need individual programming of the take-up device functions.
  • the take-up device may be arranged between a yarn feeding device equipped with a yarn brake and a yarn detector and/or a yarn selector arranged downstream of the yarn feeding device.
  • the take-up device may be mounted at an outlet of the yarn feeding device, preferably even at the outlet of a balloon breaker cone of the yarn feeding device.
  • the take-up device even may replace a yarn guiding outlet of the yarn feeding device or of the balloon breaker cone.
  • the take-up device may have a housing which, preferably, can be mounted to the outlet of a yarn feeding device or to the outlet of a balloon breaker cone.
  • the housing comprises a single or a pair of yarn guides.
  • the motor driving the take-up arm is placed in the housing and supports the take-up arm at an output shaft. Stops defining the first and second positions of the take-up arm may be mounted at the housing, preferably adjustable and preferably made from resilient material.
  • the take-up device is a complete structural unit which can be mounted to retrofit already existing yarn feeding devices or yarn feeding device balloon breaker cones.
  • the longitudinal extension of the pivotable take-up arm with respect to the pivot axis may be adjusted upon demand, and/or the distance between the pivot axis and the yarn path defined by the yarn guides,may be adjustable upon demand, in order to adapt the take-up device to various requirements, e.g. yarn qualities or requirements dictated by the yarn consuming textile machine or the respective yarn channel.
  • the motor is a step motor or a permanent magnet motor.
  • Such motor types show minimum hysteresis, can be controlled extremely precisely, have a long service lifetime, and even allow a position detection of the take-up arm internally such that a separate position sensor may be dispensed with.
  • the motor is either a rotary motor or a linear motor depending on the moveability of the take-up arm!
  • the core of the invention is to variably control the mechanical action of the take-up device on the yarn such that the yarn will be controlled optimally and in adaptation to the operation cycle of the yarn consuming machine, and with a view to a disturbance-free machine operation and high uniform quality of the final product.
  • This is achieved by a motor variably driving and adjusting the force imparted by the take-up arm on the yarn such that a take-up function is executed only when needed for an operation cycle of the textile machine, that the turning force is controlled and varied as necessary, and that the take-up arm does not at all or only as desired generate mechanical load on the yarn when the take-up function has to be terminated or when the take-up function is not needed any longer for the operation cycle of the textile machine.
  • the motor is either a rotary motor or a linear motor.
  • Fig. 1 schematically shows a yarn processing system S including a yarn consuming textile machine M, like a rapier weaving machine R as in the shown embodiment.
  • the rapier weaving machine R is a non-limiting example for a yarn consuming textile machine in functional association with which the invention may be embodied. Further, non-limiting examples for such yarn consuming textile machines are circular knitting machines e.g. for producing striped knitwear, flat knitting machines, projectile weaving machines, etc.
  • the yarn processing system S in Fig. 1 shows one yarn channel 9 of several yarn channels for processing the same or different yarn qualities.
  • the yarn Y intermittently processed in the shown yarn channel 9 is pulled off from a bobbin 1 by a yarn feeding device F having e.g. a balloon breaker cone 2 at the outlet and an internal yarn tensioner or break 29, e.g. a brush-ring contacting a storage body.
  • a take-up device T Downstream of the balloon breaker cone 2 a take-up device T is arranged.
  • the take-up device T instead could be mounted or arranged at the outlet of the yarn feeding device F directly, irrespective whether or not a balloon breaker cone 2 is provided.
  • a yarn detector 7 Downstream of the take-up device T a yarn detector 7 is monitoring the correct run of the in this case intermittently consumed yarn Y and/or the presence of the yarn Y, e.g. in the entrance region of a yarn selector 8 to which the several yarn channels 9 are connected.
  • the yarn selector 8 is arranged upstream of a weaving shed 10 of the rapier weaving machine R.
  • the rapier weaving machine R has at least one first gripper 11 which is moved from a stop position as shown in the region of the yarn selector into the weaving shed 10 and in the weaving shed 10 towards the middle of the weaving shed 10.
  • a yarn transfer takes place into a second gripper 12 which is moved to the middle of the weaving shed 10 from the right side in Fig. 1 .
  • the second gripper 12 subsequently pulls the transferred yarn Y to the right edge region of the weaving shed, while the first gripper 11 is returned.
  • the take-up device T is equipped with a motor 3 controlled uni-directionally or bi-directionally by an external signal from an electronic control device C having an input or programming section 4 and being connected e.g. with a main control unit CU of the rapier weaving machine R, e.g. via a line including at least a so-called angle bus 5 for transmitting information about the angular movement of e.g. a main shaft 6 of the rapier weaving machine R.
  • the control device C may include or may be connected to a current value control circuit 30.
  • the motor 3 is either a rotary motor or a linear motor for driving a take-up arm 16 either linearly or through a pivot stroke, in each case crosswise through a yarn path.
  • the take-up device T may comprise a position sensor 22 connected to the control unit C or the main control unit CU.
  • the position sensor 22 is useful in the case of a reversible motor 3, to detect the operative position of a driven or driving component of the take-up device T or the motor 3, and to input a corresponding position signal into the control device C..
  • the take-up device T is controlled e.g. by the control device C according to the operation cycles of the rapier weaving machine R, such that the take-up device T is only executing a take-up function for storing excess yarn length when needed for a proper operation of other components in the yarn processing system S, like the yarn selector 8, in conjunction with the first and second rapiers 11 and 12, and, in some cases, for a cutting function of an inserted weft yarn.
  • the take-up device T furthermore, has to establish a certain yarn geometry during at least the time periods of a take-up function and such that the yarn in the respective yarn channel 9 is kept stretched with a certain force and a certain geometry in the region of the yarn selector 8, and/or in the middle of the weaving shed 10, and/or at the right side of the fabric edge when the second gripper 12 has pulled the yarn Y fully through the weaving shed 10.
  • the synchronisation of the take-up functions of the take-up device T with the operation cycle or operation cycle phases of the rapier weaving machine R is executed e.g. by programming the control device C and by processing angle information transmitted via the angle bus 5.
  • the take-up function of the take-up device T is shown in more detail in Fig. 2 .
  • the yarn Y defines a straight yarn path 13 through two distant yarn guides 14, 15, e.g. yarn eyelets.
  • a take-up arm 16 is arranged for a pivot movement between a first position P1 at one side of the yarn path 13 crosswise through the yarn path 13 to a second position P2 at the other side of the yarn path 13, in order to deflect the yarn Y from the straight yarn path 13 into a substantially triangular shape as shown in full lines in Fig. 2 .
  • This take-up function means that the take-up device T will store excess yarn length of the then in most cases stopped and relaxed yarn Y and will keep the yarn stretched even further downstream.
  • the yarn running direction is shown by an arrow 19.
  • the take-up arm 16 moves in both directions as shown by a double arrow 17.
  • the motor 3 drives the take-up arm 16 such that the speed, the acceleration and/or the stroke of the take-up arm 16 can be controlled upon demand.
  • the turning force generated by the motor 3 and imparted by the take-up arm 16 on the yarn Y may be controlled and varied, e.g. such that the take-up arm 16 is able to yield under a certain reaction force of the yarn Y, i.e., to yield within the limited stroke range.
  • the first and second positions P1, P2 of the take-up arm 16 may be defined by stops (not shown in Fig. 2 ).
  • the motor 3 of the take-up device T preferably, is an electric motor like a step motor or a magnet motor like a permanent magnet motor, or even a pneumatic motor, and in the core of Fig. " a rotary motor.
  • the invention contemplates two different modes of operation of the take-up device T of e.g. Fig 2 :
  • the motor 3 is acting uni-directionally like a controlled spring to urge the take-up arm 16 from the first position P1 towards the second position P2 with a predetermined and controlled turning force.
  • the turning force is set such that, e.g., during the take-up function the yarn Y which is deflected by the take-up arm 16 is kept taut with a certain stretching force, i.e. the reaction force of the stretched yarn Y and the turning force of the take-up arm 16 in the contact point with the yarn Y are balanced.
  • the tension in the yarn varies due to influences of components in the yarn path e.g.
  • the take-up arm 16 either is moving further towards the second position P2 or is yielding, depending on whether the tension in the yarn is increasing or is decreasing.
  • the motor 3 is acting like a spring with a uni-directional turning force as the spring force.
  • the motor 3 may vary the turning force if needed.
  • the tension in the yarn will rise automatically because the mass of the yarn has to be accelerated, and because the yarn feeding device generates a certain resistance.
  • the turning force of the motor 3 is varied, i.e.
  • the yarn Y may easily return the take-up arm 16 to the first position or close to the first position P1. During this return action the reaction force of the yarn Y only has to overcome the small inertia of the take-up arm 16, because the turning force generated by the motor already has vanished.
  • the motor 3 is controlled bi-directionally to change the sense of the force direction commanded by the external signal from the control device C. This means that, as soon as the take-up function is no longer needed or needs to be varied, the turning force generated by the motor on the take-up arm 16 in the direction towards the second position P2 may not only be reduced or even reduced to zero, but the direction of the turning force even may be reversed such that the motor 3 fully or partially returns the take-up arm 16 towards the first position P1. In this case the yarn Y, when being pulled in the direction 19 and containing increasing yarn tension already does not need to return the take-up arm 16 at all.
  • the take-up arm 16 may be held by the motor 3 e.g. in the first position P1 as long as no take-up function is needed, and may be brought into the second position P2 or to a certain position ahead of the second position P2 only when a take-up function is needed.
  • a position sensor like the position sensor 22, is monitoring the position of the take-up arm 16 and/or a rotary component of the motor 3 moving in unison with the take-up arm 16.
  • the turning force for the take-up arm 16 may be controlled between maximum and minimum values, preferably zero, by varying the value of the current supplied to the motor 3 (an electric motor or a rotary magnet motor).
  • the value of the current supplied can be varied, the direction of the current can be reversed, and the position of the take-up arm 16 between the first and second positions P1, P2 can be varied and monitored in a closed feedback regulation loop.
  • control device C may include a current value control circuitry 30 or the like.
  • the programming executed by the control device C e.g. includes certain current values associated to certain rotation angles or rotation angle ranges of the main shaft 6 of the rapier weaving machine R.
  • the programming can be individual for each yarn quality, i.e. can be different for the take-up device T in another yarn channel 9.
  • the take-up devices shown in Figs 3 and 4 are designed to be mounted e.g. to the outlet of the balloon breaker cone 2 shown in Fig. 1 or at the outlet of the feeding device F, respectively.
  • a housing 18 accommodates the motor 3.
  • the housing 18 in Fig. 3 has two spaced apart cheeks 20 each containing a yarn guide 14, 15, e.g. ceramic yarn eyelets.
  • the take-up arm 16 is arranged in-between the cheeks 20 and is supported by a output shaft (not shown) of the motor 3.
  • a stop 21 may define at least one of the first and second positions P1, P2 of the take-up arm 16.
  • the single cheek 20 contains the yarn guide 15.
  • the second yarn guide 14 needed to define the yarn path 13 in this case may be a part of the balloon breaker cone 2 or the yarn feeder F instead.
  • the shorter cheek 20' in Fig. 4 may be formed with a socket for placing the position sensor 22 monitoring the position or movement of the take-up arm 16 in relation to the yarn path and/or between the first and second positions P1, P2.
  • the position information of the rotary component of the motor may even be derived electronically by other methods directly from the motor such that a structurally integrated position sensor 22 can be dispensed with.
  • Fig. 5 is a front view of a further embodiment of a take-up device T.
  • the housing 18 is U-shaped such that the motor 3 is received between the housing legs.
  • the position of the motor 3 can be varied as indicated by a double arrow 28, and such that the distance between an output shaft 26 of the motor 3 and the yarn Y in the yarn guide 15 may be varied.
  • the active longitudinal extension of the take-up arm 16 may be varied by an adjustment device 27 schematically indicated close to the output shaft 26 of the motor 3.
  • the first and second positions P1, P2 may be defined by, preferably elastic or resilient, stops 21, 23 fixed to the motor 3 or the housing 18, respectively. Each stop 21 may be adjusted in the direction of a double arrow 24 in order to change the positions P1, P2 or to vary the distance or stroke between both positions P1, P2.
  • the motor 3 is either a uni-directionally or bi- directionally operating motor, preferably a rotary or linear electric motor, magnet motor or even a pneumatic motor.
  • the force imparted by the output shaft 26 on the take-up arm 16 may be varied by the external signal from the control device C, preferably between a maximum value and zero or a lower value close to zero.
  • the direction of operation of the motor 3 can be inverted to carry out the entire or at least a partial return function of the take-up arm 16 into the first position without forcing the yarn to return the take-up arm when the yarn is pulled off by components located downstream of the take-up device.
  • the second case i.e.
  • the position sensor 22 is implemented to give additional information to the control device C about the respective actual position of the take-up arm for the control device C.
  • the take-up arm 16 could be moved linearly crosswise through the yarn path.
  • the take-up arm may be a yarn eyelet or a fork element connected e.g. directly to a lineally moving driving component of the linear motor.
  • the contact pressure between the take-up arm 16 and the stop 23 may be set upon demand.
  • the take-up arm 16 is loaded by the turning force of the motor 3 such that it may yield if the reaction force imparted by the deflected yarn on the take-up arm 16 exceeds a certain value.
  • the take-up device T has to execute a take-up function e.g. when the yarn Y is stopped and becomes relaxed, in order to take-up excess yarn length and to keep the yarn Y stretched with a certain force e.g. in the region of the yarn selector 8, also in the region where the first gripper 11 will take the yarn before inserting the yarn into the shed further in the region of the transfer from the first gripper 11 to the second gripper 12 in the middle of the weaving shed 10, and finally in the region where the second gripper 12 is decelerated and stopped. Keeping the yarn taut in the yarn selector 8 is important, because the yarn selector 8 at the same time may contain several yarns of all yarn channels 9.
  • any relaxed or slacky yarn then could easily become intermingled with the other yarns.
  • the stopped yarn has to be kept stretched with a force such that the first gripper 11 can properly grip the yarn.
  • the transfer phase the yarn has to be kept taut with a certain force such that the first gripper 11 can transfer the yarn properly to the second gripper 12.
  • the stop area of the second gripper 12 finally the yarn has to be kept taut and stretched when stopped such that the yarn can be released from the second gripper 12 properly.
  • any take-up function is undesirable as well as any undesirable interference of the take-up device T on the yarn (i.e.
  • the take-up arm would add additional tension to already high tension in the yarn Y, e.g. while the first gripper 11 is accelerating sharply, or while the second rapier 12 is accelerating sharply, or whenever the yarn is running with relatively high speed while being pulled off from the yarn feeding device F.
  • the tensioning device 29 is producing a certain basic yarn tension only when pulling off the yarn Y from the storage body of the yarn feeding device F.
  • this basic yarn tension does not suffice to keep the yarn stretched in rest periods, but to the contrary, then the take-up function of the take-up device T is needed.
  • the take-up device T By varying the turning force imparted by the motor 3 on the take-up arm 16, the take-up device T will mechanically load the yarn Y only when needed for a correct operation of the yarn processing system S, while the take-up device will release or set free the yarn from any mechanical load or only will generate a very low mechanical load, respectively, whenever a take.-up function or an interference of the take-up device on the yarn run are not useful.
  • the take-up arm 16 even can be moved away from the yarn into the first position P1 or in any random position between the given positions P1, P2 before the yarn becomes stretched by components acting from the downstream side.
  • Fig. 6 illustrates a take-up device T using a linear motor (an electric, magnetic, pneumatic type) as the motor 3 for lineally driving and/or positioning the take-up arm 16 crosswise to the yarn path 13.
  • the movement direction of the take-up arm 16 is indicated by axis X2 and may correspond to the motor axis.
  • the take-up arm 16 is connected with the output shaft 26, and may be a straight rod, a fork-like element 30 or even an open or closed yarn eyelet 31.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP08009948A 2008-05-30 2008-05-30 Aufnahmevorrichtung Withdrawn EP2128318A1 (de)

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EP08009948A EP2128318A1 (de) 2008-05-30 2008-05-30 Aufnahmevorrichtung

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EP08009948A EP2128318A1 (de) 2008-05-30 2008-05-30 Aufnahmevorrichtung

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EP2128318A1 true EP2128318A1 (de) 2009-12-02

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018009119A1 (en) * 2016-07-06 2018-01-11 Iro Aktiebolag Weft yarn feeding device forming an intermediate yarn buffer and a method for controlling a weft yarn feeding device
WO2018013033A1 (en) * 2016-07-11 2018-01-18 Iro Aktiebolag Zero-twist yarn feeding device
EP3754069A1 (de) * 2019-06-17 2020-12-23 Vandewiele NV Schussfadenspannungsvorrichtung und verfahren zum betrieb der schussfadenspannungsvorrichtung
US10900147B2 (en) 2017-08-08 2021-01-26 Microsoft Technology Licensing, Llc Woven textile with point-to-point conductive trace

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0826806A1 (de) * 1996-09-03 1998-03-04 L.G.L. Electronics S.p.A. Schussfadenbremse insbesondere für Luftdüsenwebmaschinen
WO2000044970A1 (en) * 1999-01-29 2000-08-03 Te Strake B.V. Loom with an insertion brake
WO2002010493A1 (en) * 2000-08-02 2002-02-07 Iropa Ag Weft yarn deflection brake and method for controlling the weft insertion into a weaving machine
US20050061388A1 (en) * 2001-10-29 2005-03-24 Paer Josefsson Yarn processing system
US7275291B2 (en) 2002-03-12 2007-10-02 Iropa Ag Pneumatic thread stretcher and thread processing system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0826806A1 (de) * 1996-09-03 1998-03-04 L.G.L. Electronics S.p.A. Schussfadenbremse insbesondere für Luftdüsenwebmaschinen
WO2000044970A1 (en) * 1999-01-29 2000-08-03 Te Strake B.V. Loom with an insertion brake
WO2002010493A1 (en) * 2000-08-02 2002-02-07 Iropa Ag Weft yarn deflection brake and method for controlling the weft insertion into a weaving machine
US20050061388A1 (en) * 2001-10-29 2005-03-24 Paer Josefsson Yarn processing system
US7275291B2 (en) 2002-03-12 2007-10-02 Iropa Ag Pneumatic thread stretcher and thread processing system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018009119A1 (en) * 2016-07-06 2018-01-11 Iro Aktiebolag Weft yarn feeding device forming an intermediate yarn buffer and a method for controlling a weft yarn feeding device
CN109415850A (zh) * 2016-07-06 2019-03-01 Iro有限公司 形成中间纱线缓冲器的纬纱进给设备以及用于控制纬纱进给设备的方法
EP3481979A4 (de) * 2016-07-06 2020-03-04 IRO Aktiebolag Einen zwischengarnpuffer formende schussfadenzuführvorrichtung und verfahren zur steuerung einer schussfadenzuführvorrichtung
WO2018013033A1 (en) * 2016-07-11 2018-01-18 Iro Aktiebolag Zero-twist yarn feeding device
US10900147B2 (en) 2017-08-08 2021-01-26 Microsoft Technology Licensing, Llc Woven textile with point-to-point conductive trace
EP3754069A1 (de) * 2019-06-17 2020-12-23 Vandewiele NV Schussfadenspannungsvorrichtung und verfahren zum betrieb der schussfadenspannungsvorrichtung
WO2020254091A1 (en) * 2019-06-17 2020-12-24 Vandewiele Nv Weft thread tensioning device and method of operating a weft thread tensioning device
CN113924390A (zh) * 2019-06-17 2022-01-11 范德威尔公司 纬纱张紧设备和操作纬纱张紧设备的方法
CN113924390B (zh) * 2019-06-17 2023-10-03 范德威尔公司 纬纱张紧设备和操作纬纱张紧设备的方法

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