EP0401516A1 - Dispositif et procédé pour rattacher le fil sur un métier à filer à bout libre - Google Patents

Dispositif et procédé pour rattacher le fil sur un métier à filer à bout libre Download PDF

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Publication number
EP0401516A1
EP0401516A1 EP90108512A EP90108512A EP0401516A1 EP 0401516 A1 EP0401516 A1 EP 0401516A1 EP 90108512 A EP90108512 A EP 90108512A EP 90108512 A EP90108512 A EP 90108512A EP 0401516 A1 EP0401516 A1 EP 0401516A1
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EP
European Patent Office
Prior art keywords
thread
feeder
stop
tube
open
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.)
Granted
Application number
EP90108512A
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German (de)
English (en)
Other versions
EP0401516B1 (fr
Inventor
Rupert Karl
Rudolf Becker
Albert Kriegler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CAMBIO RAG.SOCIALE;RIETER INGOLSTADT SPINNEREIMASC
Original Assignee
Schubert und Salzer Maschinenfabrik AG
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Schubert und Salzer Maschinenfabrik AG filed Critical Schubert und Salzer Maschinenfabrik AG
Publication of EP0401516A1 publication Critical patent/EP0401516A1/fr
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Publication of EP0401516B1 publication Critical patent/EP0401516B1/fr
Anticipated expiration legal-status Critical
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/50—Piecing arrangements; Control therefor for rotor spinning

Definitions

  • the present invention relates to a device for spinning a thread on an open-end spinning device, with an open-end spinning element, a thread take-off tube, a winding device, a feeder for feeding a thread end to the thread take-off tube, a cutting device for defined cutting to length of the thread and a drive device for the To move feeders from a rest position to a thread take-up position and a cutting position to a thread insertion position and a thread insertion position, as well as a method for piecing a thread with the aid of such a device.
  • both the feeder and the cutting device can be moved out of a rest position in order to pick up the thread, cut it to length, put it into the thread take-off tube and finally release it.
  • the feeder and the cutting device are arranged on a slide and are movably mounted on the slide, wherein they are driven with fixed transmission ratios by one and the same drive mounted on the slide.
  • the spinning rotor is often exchanged for one with a different diameter. If the yarn return length is not adapted to this changed diameter of the spinning rotor (or the size of another open-end spinning element), there is a risk that the attachment will fail or the piecing cannot be tolerated. However, it is not possible to set the thread return length in the known device, since otherwise the thread cannot be cut to length or the cutting device could get into the area of the thread take-off tube.
  • the object of the present invention is therefore to design the known device so that the returned thread length can be adapted to the open-end spinning element used in each case, and to create a method which can be carried out with the aid of this device.
  • the feeder is assigned a first stop for setting the cutting position and a second stop for setting the thread insertion position, the first stop being ineffective, and in that a thread length adjusting device is provided for fixing the open end Spinning element thread length to be returned.
  • the first of the two stops defines the thread length that protrudes from the feeder as the free thread end, while the second stop fixes the distance of the feeder from the mouth of the thread take-off tube in such a way that, depending on the length of the free thread end, this ends exactly over the mouth of the Thread take-off tube arrives.
  • This fixing of the cutting position and the thread insertion position of the feeder has given exact thread lengths, so that the exact thread length required for piecing can be set with the aid of the thread length adjusting device.
  • the thread length adjusting device expediently has an adjustment scale. This preferably has markings for different sizes of the open-end spinning element. It has been shown that the thread length to be returned must also be of different sizes, depending on different types of fibers, which is why it is furthermore advantageous if the setting scale has markings for different types of fibers.
  • the thread adjustment device can be designed differently and consequently control the thread length to be returned in different ways.
  • the first of the two stops is adjustable and part of the thread length adjustment device. This results in a length of the thread end that corresponds to the desired thread return. If the second stop is not adjustable, it can be ensured by appropriate design of the mouth of the thread take-off tube or an appropriate air duct that even with different yarn end lengths and the same way by which the feeder is moved over the mouth of the thread take-off tube, a safe suction of the Thread end is guaranteed.
  • the two stops are advantageously arranged on a common support, it being expedient not only to set one stop by relative adjustment with respect to the support, but also to set both stops together by adjusting the common support.
  • the feeder is advantageously connected to its drive device via an elastic coupling member. If the feeder is now stopped by running onto the second stop, the additional movement of the drive is absorbed by this elastic coupling member.
  • the thread length adjustment device can also be connected via a control device to a drive device of a thread return device, which can be formed by the winding device or an auxiliary bobbin and its drive or also by auxiliary rollers. This makes it possible to return thread lengths, which are not provided by appropriate adjustment of the stops, through an adapted return delivery from the winding device into the spinning element.
  • the feeder can in principle be stored and moved in any manner, but arranging the feeder on a pivot axis is particularly advantageous, the carrier also being expediently arranged on this pivot axis of the feeder.
  • the pivot axis is arranged essentially parallel to the thread path, so that the feeder can be moved accordingly in a substantially horizontal pivot plane.
  • the first stop must release the feeder. This can be done in different ways, for example by a retractable counter element on the feeder.
  • the first stop is advantageously movable transversely to the direction of movement of the feeder. In order to relieve this stop, it can be provided that the feeder can be briefly moved away from this before the first stop is withdrawn.
  • the thread is not only brought to a certain length, but also in a special shape that is particularly suitable for piecing.
  • a preparation device for the thread end is arranged in the path of movement of the feeder between the cutting device and the cutting position of the feeder.
  • a support curve is connected to the first stop, on which the preparation device is supported elastically and through which it can be brought into the area of the thread that leads to the extends in the cutting position feeder. It is also advantageous if the preparation device is pivotally mounted around the cutting device.
  • the feeder is assigned a draw-off tube cover which - with respect to the feed movement of the feeder can be held by means of an elastic element in contact with the trailing side of the feeder and can be held back in this position with respect to the movable feeder by a stop in the area of the thread take-off tube.
  • a compact exhaust pipe cover can be provided, which always stops above the exhaust pipe regardless of the feed movement of the feeder and optimizes the air flow, so that a safe suction of the thread end is guaranteed regardless of the respective length of the thread end and the corresponding feed movement of the feeder.
  • the draw-off tube cover has a cover plate, which - in relation to the feed movement of the feeder - is designed in front of all of the edges as a counter-stop for the stop in the area of the yarn draw-off tube.
  • the cover plate With the help of the cover plate, the air flow in the area of the mouth of the thread take-off tube can be strengthened, so that an improved introduction of the thread end into the draw-off tube is achieved.
  • the draw-off tube cover has a bearing piece and a cover plate which is pivotably mounted thereon and which can be brought into contact with the mouth of the yarn draw-off tube. It has proven to be advantageous that the cover plate is assigned a controllable drive device, which preferably has an electromagnet.
  • the cover plate has on its side facing the thread take-off tube an elastic or elastically mounted sealing plate, which according to a preferred embodiment is a rigid, from which Cover plate is elastically carried sealing plate. In order to ensure that the cover plate and not the sealing plate serves as a stop, it can be provided that the cover plate projects beyond the sealing plate in the direction of the feeder.
  • the feeder the two stops assigned to it and the thread length adjusting device are expediently arranged on the maintenance device.
  • the cutting position and the thread insertion position of the feeder are fixed to a predetermined size of the fiber collecting surface of the open-end spinning element and that different thread lengths for piecing are produced by returning or pulling off the thread.
  • the cutting position and the thread insertion position of the feeder are preferably the smallest size of the fiber collecting surface of the open-end spinning element that can be used and, in the case of larger sizes of the fiber collecting surface that are used, the additionally required thread length is provided by return delivery. In this way, the thread return delivery length can be controlled in a simple manner, for example by changing an electronic control program.
  • the device according to the invention and also the method according to the present invention are simple and allow a very exact adjustment of the thread length to be returned, so that defi niert, inconspicuous piecing with high strength can be achieved. If spinning rotors on a machine are exchanged for such other diameters - or other spinning elements with a different size of the fiber collecting surface -, an adaptation to the new diameter or the new size of the fiber collecting surface can be achieved quickly and precisely, so that the same will still be the case Piecing security is guaranteed and the piecing is also inconspicuous.
  • FIG. 1 The subject matter of the invention is first explained with the aid of FIG. 1, in which only the parts necessary for understanding the invention are shown.
  • FIG. 1 In an open-end spinning machine, a large number of open-end spinning devices are arranged next to one another, of which only the covers 10 and 11 of two adjacent spinning positions can be seen in FIG. 1.
  • the covers 10, 11 each cover a spinning device which in the usual and therefore not shown manner has an open-end spinning element, for example a spinning rotor, with a fiber collecting surface.
  • the open-end spinning element is preceded by an opening device, to which a sliver is fed with the aid of a feed device.
  • the dissolving device dissolves the sliver into individual fibers, which are fed to the open-end spinning element and are deposited there on the fiber collecting surface under the action of a suction air stream (negative vacuum).
  • the fibers are bound into the end of a thread end and drawn off through a thread draw-off tube 12 with the help of a pair of draw-off rollers 2, which in the usual way consist of a driven draw-off roller 20 and a pressure roller which rests elastically thereon 21 is formed.
  • the drawn thread 35 is fed to a winding device 3, which has a driven winding roller 30, on which a bobbin 31 rests during the spinning operation.
  • the bobbin 31 is carried in a known manner between two bobbin arms 32 and 33, with the aid of which the bobbin 31 can be brought into contact with the bobbin roller 30 or can be lifted off the bobbin.
  • An auxiliary drive device 34 which has a drivable auxiliary drive roller 340, can be delivered to the coil 31. Since auxiliary drive devices of this type are known, for the sake of clarity the illustration of the conventional swivel drive for this and the drive device for the auxiliary drive roller 340 have been omitted.
  • a suction tube 4 which can be fed to the bobbin 31 in the event of a thread breakage.
  • This suction tube 4 has a mouthpiece 40 in the usual way, which extends in the receiving position in the vicinity of the coil 31 parallel to its surface line over the entire length of the coil 31.
  • the suction tube 4 has on its winding device 3 and the spinning device - from which only the cover 11 can be seen - a longitudinal slot through which the thread 35 can exit the suction tube 4 when it is pivoted back into the position shown in FIG. 1 .
  • a centering device 41 is located in the thread path of the thread 35 emerging from the suction tube 4.
  • this consists of a drivable spindle with two Length sections 410 and 411 of different diameters, between which there is a circumferential groove 412.
  • the centering device 41 is mounted on a swivel arm 413, which can be brought into different swivel positions by a swivel drive 414 about a swivel axis 415.
  • the length section 410 facing the swivel arm 413 has a larger diameter than the length section 411 at the free end of the centering device 41.
  • the two length sections 410 and 411 have opposite threads.
  • the centering device 41 can be driven selectively in each of the two directions of rotation by means of a drive 416.
  • a feeder 5 can be fed to the thread 35 extending from the suction pipe 4 via the centering device 41 to the bobbin 31.
  • the feeder 5 consists essentially of a swivel arm 50 which can be swiveled about its swivel axis 52 with the aid of a swivel drive 51.
  • the feeder 5 has a controllable thread clamp 53 which, according to FIG. 1, consists of a clamping jaw 530 rigidly connected to the pivot arm 50 and a jaw 531 movable for this purpose.
  • a drive 532 is assigned to this clamping jaw 531, for example in the form of an electromagnet.
  • a stop 7 can be delivered to the feeder 5.
  • This stop 7 is arranged on a carrier 70 which is carried by the armature of an electromagnet 71 and brought by this into the pivoting range of the feeder 5 or moved out of it and can thereby be rendered ineffective (see arrow P14).
  • the Carrier 70 has an adjustment slot 700, by means of which the stop can be adjusted essentially parallel to the pivoting path of the feeder (arrow P 1).
  • a further stop 77 is assigned to the feeder 5, which in the exemplary embodiment shown in FIG. 1 is attached to the cover 11 in an unadjustable manner. As will be explained in more detail later, this second stop 77 serves to determine the thread insertion position of the feeder 5.
  • the thread insertion position should be understood to mean the position of the feeder 5 in which the end of the thread 35 is above and into the mouth of the thread take-off tube 12 can be introduced.
  • a cutting device 8 is provided in such a way that a thread 35 can be separated on the side of the thread clamp 53 facing away from the bobbin 31.
  • the cutting device 8 consists of a roller 80 which serves as an anvil and with which a cutting edge 81 cooperates, for which purpose a drive 82 is assigned.
  • the cutting device 8 in FIG. 1 has been shown somewhat rotated relative to the correct representation according to FIG. 2.
  • the cutting position of the feeder 5 is determined by the abovementioned stop 7.
  • the cutting position is to be understood to mean the position of the feeder 5 in which the thread end extending into the suction tube 4 the thread 35 connected to the bobbin 31 is cut off.
  • the adjustable in the direction of arrow P 1 or opposite stop 7 determines in this way the length of the thread end protruding from the thread clamp 53 'which is produced by cutting by means of the cutting device 8. If the angular distance - based on the swivel axis 52 of the feeder 5 - between the stop 7 and the cutting device 8 is larger, the free thread end that is generated becomes correspondingly larger, while it becomes smaller with a smaller angular distance.
  • drive and control elements are assigned to the individual elements described, which can be designed in a generally customary manner and are therefore not shown in the figures for the sake of clarity.
  • the drive and control elements are controlled by a control device 96 (see FIG. 3) which also controls the entire piecing process.
  • the thread 35 spun in the usual manner in the spinning device is fed with the aid of the draw-off roller pair 2 to the bobbin 31 driven by the winding roller 30 and wound onto it, the thread 35 in the usual manner by thread tension compensation means (not shown) under constant tension is held and is oscillated by a traversing thread guide, not shown.
  • the open-end spinning device is shut down in a known manner, so that no more fibers get onto the fiber collecting surface of the open-end spinning element.
  • the bobbin 31 is lifted from the winding roller 30 with the aid of known means and therefore not shown, so that the bobbin 31 is also stopped.
  • the open-end spinning element is cleaned in a known manner, which is generally braked temporarily, possibly even to a standstill.
  • auxiliary drive roller 340 of the auxiliary drive device 34 is then delivered to the bobbin 31 lifted off the winding roller 30.
  • the auxiliary drive roller 340 is now driven with the aid of conventional means (for example drive motor 342 - see FIG. 3) opposite to the normal winding direction.
  • suction pipe 4 is pivoted against the coil 31 and a negative pressure is generated in it, in accordance with the feed movement of the auxiliary drive device 34. The thread end is thus sucked into the suction pipe 4.
  • the suction tube 4 After a sufficient length of the thread 35 has entered the suction tube 4 so that it is held securely by the suction air flow prevailing here, the suction tube 4 is pivoted away from the spool 31, the thread 35 leaving the suction tube 4 through its longitudinal slot with its however, the free end is still held in the intake manifold 4.
  • the thread 35 leaving the suction pipe 4 arrives on exiting from the suction pipe 4 to the centering device 41, which is then driven so that the thread 35 passes into its circumferential groove 412.
  • the thread 35 thus assumes a defined thread path between the slot end facing away from the spool 31 and the centering device 41.
  • the feeder 5 is initially in a starting position 5a (FIG. 2), from which it is pivoted into the position shown in FIG. 2 by a solid line, its cutting position.
  • the thread clamp 53 passes the thread path (see thread 35a), grips and clamps the thread 35 between its clamping jaws 530 and 531, which may first be opened to grip the thread 35 and closed again after the thread 35 has been picked up.
  • the feeder 5 is then pivoted further in the direction of arrow P2 until it runs onto the stop 7 and thus reaches its cutting position.
  • the thread 35 which extends from the slot end of the suction tube 4 to the thread clamp 53, passes the cutting device 8. If the feeder 5 has its position in contact with the stop 7, i.e. reached its cutting position, the cutting device 8 is actuated and the thread 35 is cut, which thus has a defined thread length 1 between the thread clamp 53 and the cutting device 8.
  • the feeder 5 After the thread 35 has been brought to its defined thread length 1, the feeder 5 must be moved to the open-end spinning device (see cover 11). For this purpose, the stop 7 is withdrawn from the swivel path of the feeder 5. In order not to have to use large driving forces for this purpose, the feeder 5 is first shown in FIG Direction of arrow P3 slightly removed from the stop 7 before it is pulled away from the pivot path of the feeder 5. Then the feeder 5 is pivoted in the direction of the arrow P4 to the stop 77 in its thread insertion position 5b, the thread clamp 53 being moved over the mouth of the thread take-off tube 12.
  • the position of the stop 77 is determined such that the end of the thread 35 in the thread insertion position 5b of the feeder 5 is substantially above the mouth of the thread take-off tube 12 and is sucked into the latter by the effective suction air flow.
  • the feeder 5 now returns in the direction of the arrow P5 and remains in the transfer position 5c above the thread take-off tube 12.
  • the thread clamp 53 (FIG. 1) is opened so that the thread 35 is released from the feeder 5.
  • the thread 35 is now sucked onto the fiber collecting surface of the open-end spinning element, not shown, where it lies on the fibers that have been fed back in again.
  • the thread take-off now starts again in a manner known per se and the thread 35 is wound onto the winding roller 31, which has meanwhile been lowered again onto the winding roller 30.
  • the centering Direction 41 opposite to the previous direction of rotation, which was required to center the thread 35, the thread 35 is now moved over the length section 411 to its free end and thrown off.
  • the stop 7 is adjustable substantially parallel to the pivot path of the feeder 5 (see arrow P1). This adjustability serves the purpose of being able to adapt the free thread end to different sizes of the fiber collecting surface. Furthermore, this adjustability of the stop 7 enables an adaptation to different fiber materials, which differ with regard to the stack length of the fibers or also with regard to whether they are smooth or crimped. This will be explained in more detail later in connection with FIG. 4.
  • the stop 77 is not adjustable in this embodiment.
  • the stop 77 is firmly adjusted to match the smallest possible size of the fiber collecting surface, for example the diameter of a spinning rotor.
  • the fixedly adjusted stop 77 thus serves to fix it a basic length of the thread 35 to be returned into the open-end spinning element.
  • this additionally required length of thread is provided after the free end of the thread 35 has been introduced into the thread take-off tube 12 by returning the thread 35, which is brought about by turning the auxiliary drive roller 340 back by a defined distance (circumferential area).
  • a drive motor 342 is provided for driving the auxiliary drive roller 340 according to FIG. a belt overdrive, not shown, connected to the auxiliary drive roller 340.
  • the drive motor 342 is connected via a control line 343 and the already mentioned control device 96 to the thread length adjustment device 9, which has an adjustment button 90 and an adjustment scale 91.
  • the adjusting knob 90 By turning the adjusting knob 90 in the direction of the arrow P7 or P8 the aforementioned additional required return quantity of the thread 35 can thus be determined.
  • This setting ensures that the auxiliary drive roller 340 is rotated more or less in the unwinding direction of the bobbin 31 and accordingly provides a larger or smaller additional thread length.
  • the thread length to be returned is shared by the stop 77 and the auxiliary drive roller 340 determined, this length being determined by the adjusting knob 90 of the thread length adjusting device.
  • a special piecing spool (not shown) can also be provided, from which the thread 35 to be spun is unwound.
  • the thread length adjustment device 9 can be assigned to this piecing bobbin.
  • the return of the thread takes place with the aid of auxiliary rollers, not shown, to which the thread length adjusting device 9 can then optionally be assigned.
  • the first stop i.e. the stop 7 adjustable and thus determines the basic length of the thread length to be returned for spinning onto the fiber collecting surface of the open-end spinning element.
  • the adjusting knob 90 of the thread length adjusting device 9 also serves to adjust the thread length to be returned to the fiber collecting surface during the piecing process, so that the adjustable stop 7 is also part of the thread length adjusting device.
  • FIG. 4 shows a modification of the device shown in FIG. 1, in which the two stops 7 and 72 for the feeder 5 are carried by a common carrier 73.
  • This carrier 73 has the shape of a plate.
  • the carrier 73 is part of this thread length adjusting device and for this reason rotatably mounted on the pivot axis 52 of the feeder 5, so that both stops 7 and 72 are adjusted together by adjusting the plate-shaped carrier 73 without this however, the angular distance between the stops 7 and 72 changes.
  • the position of the stop 7 see position 7a
  • the position of the stop 72 for the thread insertion position of the feeder 5 is also automatically changed (see position 72a). In this way it is achieved that in any case the distance between the thread clamp 53 and the cutting device 8 on the one hand, which determines the length of the free thread end, and the thread clamp 53 and the thread take-off tube 12 (see FIGS. 1 and 2) with certainty always the same is great.
  • the adjustment slot 730 is also bent accordingly.
  • a bolt 731 extends through the adjustment slot 730 and is suitably held stationary.
  • the bolt 731 has a thread at its free end, onto which a wing nut 732 is screwed. After loosening the wing nut 732, the carrier 73 can thus be adjusted with the stops 7 and 72 and then secured again in the set position by tightening the wing nut 732 again.
  • the second stop 77 is adjustable, since differences between the distance between the thread clamp 53 of the feeder 5 in the cutting position and the cutting device 8 on the one hand and the distance between the Thread clamp 53 of the feeder 5 located in the thread insertion position 56 and the mouth of the thread take-off tube 12, on the other hand, can be compensated for by appropriate control of the bobbin 31 in the unwinding or winding direction. This is all the more true if the first stop 7 is connected to the control device 96 (FIG. 3) in such a way that the current position of the stop 7 is sensed and reported to the control device 96 that this position of the stop 7 when controlling the Auxiliary drive roller 340 - taking into account the setting of the adjusting knob 90 - considered.
  • stop 77 is not adjustable, it is in the preferred embodiment of the device described in the position which corresponds to the smallest size of the fiber collecting surface speaks, since otherwise by an attached to the feeder 5 and in the direction of the arrow P5 oriented compressed air nozzle (not shown) should be ensured by their training and / or orientation that the thread 35 with its free end during the return movement of the feeder 5 from the Thread insertion position 5b in its transfer position 5c really also comes into the sphere of influence of the air flow effective in the thread take-off tube 12.
  • stops 7 and 77 are in a position that corresponds to the smallest size of the fiber collecting surfaces of the open-end spinning element that are used.
  • each additional thread length required is turned back by turning the winding device 3 or else by return delivery from a special piecing spool (not shown), e.g. with the aid of auxiliary conveyor rollers (also not shown).
  • stops 7 and 77 are not set to the smallest size of the possible fiber collecting surface sizes, but instead deviate therefrom, the resulting differences in the thread length required for piecing are made by correspondingly turning the bobbin 31, a special piecing bobbin and / or special auxiliary conveyor rollers compensated in the unwinding or in the winding direction.
  • the carrier 73 has an adjustment scale 92 with which a stationary pointer 93 cooperates.
  • the adjustment scale 92 has markings in the form of graduations 920, which define certain sizes of the fiber collecting surface, e.g. Rotor diameter, mark.
  • the tick marks 930 are assigned even smaller markings in the form of tick marks 921 for setting different types of fibers, which allow a deviation from the basic setting defined by the tick marks 920 in adaptation to different types of fibers.
  • the carrier 73 With normal fiber material, the carrier 73 is set so that the pointer 93 points to the graduation 920, which corresponds to the size of the fiber collecting surface, for example the diameter of the spinning rotor, which is currently used on the open-end spinning device in question. If the fiber material deviates from the normal values in terms of its fiber length or its tendency to curl upwards or downwards, the carrier 73 is adapted to the fiber material is adjusted from this position corresponding to the fiber collecting surface by one or more graduation marks 921 in one or the other direction.
  • the setting scale does not necessarily have to have different graduations 920 and 921 for the size of the fiber collecting surface and for the fiber material. It may be enough also a scale without subdivision or only with references either to the size of the fiber collecting surface or to the fiber material.
  • a preparation device 83 is provided for the thread end in the exemplary embodiment shown in FIG. 4.
  • the arrangement should be such that the preparation device 83 is in the vicinity of the thread path when the feeder 5 is in contact with the stop 7. 4 is in the path of movement of the feeder 5 between the cutting device 8 and the thread clamp 53 which is in contact with the stop 7, i.e. in the cutting position, the feeder 5.
  • the thread path changes when the stop assumes different positions. If the stop 7 is in its position 7a, for example, the thread 35 between the thread clamp 53 and the cutting device 8 assumes the position 35b. This position would change if unchanged Position of the preparation device 83, the thread 35 held stretched is no longer in the mouth region of the preparation device 83.
  • the preparation device 83 is mounted on a swivel arm 84, the swivel axis 85 of which is located in the region of the cutting device 8.
  • the pivot arm 84 with the preparation device 83 is held in elastic contact with a support curve 733, which is formed on the carrier 73 for the stop 7, with the aid of a tension spring 86, which is anchored on the one hand in the carrier 73 and on the other hand on the pivot arm 84.
  • This support curve 733 has such a shape that, when adjusting the support 73, the preparation device 83 is always brought into the thread path corresponding to the position of the stop 7 by the action of a tension spring 86. In this way it is ensured that the end of the thread 35, which is produced by cutting with the aid of the cutting device 8, is always located above the preparation device 83 and can therefore also be safely introduced into it and prepared there in the desired manner.
  • the preparation device 83 can be mounted as desired. For example, it is also possible to arrange them in a sliding manner in a link arranged radially to the pivot axis 52. Since the thread path of the thread 35 extending to the feeder 5, when the feeder 5 is in its cutting position in abutment with the stop 7, depends on the position of the stop 7, the support curve 733 with the stop 7 (in the exemplary embodiment shown above the Carrier 73) connected.
  • the thread 35 is also introduced into the preparation device 83 can, if desired, be carried out with the aid of a suction air flow effective in the preparation device 83 or also with the aid of a compressed air flow directed against the preparation device 83, a corresponding compressed air nozzle possibly also being provided on the feeder 5.
  • the subject matter of the invention can be modified in a variety of ways, e.g. by replacing individual features with equivalents and other combinations thereof.
  • a digital thread length adjusting device is provided on the control device 96, which automatically adjusts the carrier 73 and thus the stops 7 and 72 after input or setting of corresponding numerical values.
  • FIG. 5 shows a modification of the device in which the pivot axis 54 of the feeder 5 is arranged horizontally.
  • the feeder 5 has In this embodiment, a cranked swivel arm 55, at the free end of which there is a thread clamp 56, which has a first clamping jaw 560, which is an integral part of the swivel arm 55, and a movable second clamping jaw 561, to which a drive 562 is assigned.
  • the feeder 5 can be moved in the direction of the arrow P8 into its transfer position and into its end position (not shown), which is why the thread clamp 56 is funnel-shaped in relation to this direction of movement (arrow P8) and can also be opened to the front.
  • the swivel arm 55 has a stop 57 which is in contact with the stop 7 in the cutting position of the feeder 5, in which the thread 35 is separated by the cutting device 8.
  • the stop 7 and a stop 74 for determining the thread insertion position are mounted on a common carrier 75, which is an essential part of a thread length adjustment device.
  • the carrier 75 is fastened to a stationary holder 76 in such a way that the carrier 75 can be adjusted in the direction of the double arrow P9 in one direction or the other parallel to the direction of movement (see arrow P8) of the feeder 5.
  • the carrier 75 has an adjustment slot 750, through which a bolt 760 carried by the holder 76 extends, onto which a nut 761 can be screwed and thus secures the carrier 75 on the holder 76.
  • the carrier 75 in turn has an adjustment scale 94 with which a pointer 95 carried in a stationary manner cooperates. It is thus in turn possible to set the position of the carrier 75 exactly according to the respective requirements.
  • the feeder 5 is initially in a starting position, not shown, which — in relation to the illustration in FIG. 5 — is to the right of the position shown.
  • the thread 35 passes between the two jaws 560 and 561 of the thread clamp 56.
  • the clamping jaws 560 and 561 can be opened during the take-up of the thread 35 and can be closed after the take-up of the thread 35. However, it is also possible to leave the clamping jaws 560 and 561 in mutual elastic contact even during the take-up of the thread 35 if the thread 35 is securely picked up by appropriate selection of the clamping pressure and by appropriate design of the clamping jaws 560 and 561. This also applies to the thread clamp 53 described above.
  • the feeder 5 continues its pivoting movement about the pivot axis 54 until its stop 57 comes to rest against the stop 7 preset with the aid of the carrier 75.
  • the thread 35 is brought between the roller 80 and the cutting edge 81 of the cutting device 8.
  • the cutting device 8 is actuated so that the thread end protruding from the thread clamp 56 has a defined length 1 preset by setting the stop 7 with the aid of the carrier 75.
  • the stop 7 is moved away from the movement path of the feeder 5, in particular its stop 57, the feeder 5 possibly also being moved slightly opposite to the direction marked by the arrow P Maschinen.
  • the feeder 5 is pivoted further in the direction of the arrow P8 until its stop 57 comes to rest against the stop 74.
  • the position of the stop 74 is fixed on the carrier 75 so that when the feeder 5 is in contact with the stop 74, i.e. is in its thread insertion position, the thread end in this position of the feeder 5 ends above the mouth of the thread take-off tube 12. After the stops 7 and 74 are adjusted jointly, this applies in every position of the carrier 75.
  • the thread end is now sucked into the thread take-off tube 12, it being possible for corresponding guide elements to be provided in the region of the mouth of the thread take-off tube 12 (see guides) 110 and 111 in Fig. 1).
  • the feeder 5 is then moved back until the thread clamp 56 is above the mouth of the thread take-off tube 12.
  • the thread clamp 56 is opened so that the thread 35 can be sucked into the thread take-off tube 12.
  • the actual piecing back delivery down to the fiber collecting surface can take place in the usual way, for example by throwing off the thread 35 from a previously formed thread reserve (not shown).
  • the feeder 5 returns to its starting position.
  • the thread take-off tube 12 has a specially designed mouthpiece 13 (see FIG. 6).
  • the mouthpiece 13 has a slot 130 extending from the mouth of the thread take-off tube 12 in the direction of the arrow pio, the side walls of which form a guide for the thread 35.
  • the mouthpiece 13 also has on its side facing away from the thread take-off tube 12 a sealing surface 131, on which a take-off tube cover designed as a cover plate 60 can be placed.
  • the cover plate 60 is part of a swivel arm 6, which is mounted together with the feeder 5 on one and the same swivel axis 52.
  • the pivot arm 6 is axially movable on the pivot axis 52.
  • a spring support disk 520 is provided according to FIG. 6 at the upper end of the pivot axis 52.
  • a compression spring 521 is arranged which acts on the swivel arm 6 in the direction of the swivel arm 50, ie in the direction of the arrow P 1.
  • the mouthpiece carries - in relation to the direction given by the arrow P10 - a ramp ramp 132, while the swivel arm 6 in the region of its cover plate 60 on its leading side - in relation to the arrow P10 - on its bottom side facing the mouthpiece 13 a corresponding ramp (not shown).
  • the mouthpiece 13 carries at its outlet end - with respect to the arrow P10 - a stop 14 against which the swivel arm 6 can be brought to rest.
  • the swivel arm 60 has a stop 600 on its leading side - with respect to the feed movement of the feeder 5 marked by the arrow Pio - with which it can be held in abutment on the trailing side of the swivel arm 50 of the feeder 5.
  • an elastic element designed as a tension spring 61 is provided, one end of which is attached to the swivel arm 50 and the other end of which is attached to the swivel arm 6.
  • a drive lever 59 is mounted on the swivel axis 52, which carries a stop 590, on which the swivel arm 50 abuts is held with the aid of an elastic coupling member, for example a spring 591, one end of which is attached to the swivel arm 50 and the other end of which is attached to the drive lever 59.
  • the drive lever 59 thus forms a drive device for the feeder 5, ie for its swivel arm 50.
  • a drive pinion 592 which is an integral part of the drive lever 59, is also mounted on the pivot axis 52. With the drive pinion 592, a rack 593 is engaged, which can be driven in the direction of the double arrow P 12 by drive means, not shown.
  • the swivel arm 50 of the feeder 50 is not driven directly by the drive lever 59, but rather via the elastic coupling member (spring 591). First, the swivel arm 50 is in contact with the stop 590 of the drive lever 59, while the swivel arm 6 with its stop 600 is in contact with the swivel arm 50.
  • the swivel arm 50 is brought into contact with the stop 7 (see FIGS. 2 and 4).
  • the drive lever 59 moves further in the direction of the arrow P4 (see FIG. 2).
  • the swivel arm 60 reaches the ramp ramp 132 of the mouthpiece 13 and slides on the sealing surface 131, the swivel arm 60 is removed from the swivel arm 50 against the action of the compression spring 521 in the axial direction opposite to the arrow P11.
  • the drive lever 59 continues its movement and now only takes the swivel arm 50 with it, since the swivel arm 6 restrains it. Finally, the swivel arm 50 reaches the stop 77 and is in turn held back here, while the drive lever 59 continues its movement slightly.
  • the additional movement that the drive lever 59 executes with respect to the swivel arm 50 is based on the fact that the movement generated by the movement of the rack 593 cannot be matched to the required swivel path as precisely as would be desirable for optimal function.
  • the pivoting movement caused by the rack 593 is selected to be greater than the maximum pivoting movement required for the pivoting arm 50; Furthermore, for the reason mentioned, the swivel arm 50 of the feeder 5 is not rigid with the drive lever, but is only connected via an elastic coupling member.
  • the thread 35 is then drawn off in the usual way, and if it is a thread drawn from a piecing bobbin, it is transferred to the winding device 3 in a manner known per se.
  • FIG. 7 shows a modification of the swivel arm shown in FIG. 6.
  • a bearing piece 62 designed as a pivot arm is fastened in an axially secured manner on the pivot axis 52 (see FIG. 6).
  • a cover plate 64 is mounted via a joint 63, the leading edge (with respect to the feed movement of the feeder 5) is designed as a counter-stop to the stop 14.
  • a controllable drive device - in the exemplary embodiment shown in the form of an electromagnet 65 - is provided, which is removed from the bearing piece 62 by means of a bearing 620 is carried and its anchor 650 with one supported by the cover plate 64 Camp 640 is connected.
  • the electromagnet 65 is connected via lines 651 to a control device, not shown.
  • electromagnet 65 it is not absolutely necessary to connect the electromagnet 65 on its two elements to the bearing piece 62 or the cover plate 64. It is sufficient to arrange the electromagnet 65 fixed either on the bearing piece 62 or the cover plate 64 and the counter element, which is formed by the cover plate 64 or the bearing piece 62 depending on the arrangement of the electromagnet 65, by means of a spring or the like. to keep in constant contact at the free end of anchor 650.
  • another drive device can of course also be provided, for example one that is controlled by the cover plate running onto the stop 14 via a linkage - as a result of the run-up movement.
  • the bearing piece 62 similar to the swivel arm 6 shown in FIG. 6, has a lateral stop 600, with which the bearing piece 62 can be held for contact with the swivel arm 50 of the feeder 5, not shown in FIG. 7.
  • An elastic or elastically mounted sealing plate 641 is provided on the cover plate on its side facing the mouthpiece 13, not shown.
  • the elastically mounted sealing plate 641 shown four threaded bores are provided, into which screws 642 are screwed.
  • the heads of the screws 642 serve as a stop and determine the maximum distance between sealing plate 641 and cover plate 64.
  • a fifth screw 643 in the middle between the screws 642 serves as a guide for a compression spring 644, which is supported on the one hand on the cover plate 64 and on the other hand on the sealing plate 641 and always keeps this at a distance from the cover plate 64.
  • the rigid, carried by the cover plate 64 sealing plate 641 does not extend as far as the cover plate 64, which cooperates with the stop 14, in the exemplary embodiment shown - with respect to the direction of movement indicated by the arrow P10.
  • the cover plate thus projects beyond the sealing plate 641 in the direction of the leading feeder 5, so that the mobility of the sealing surface 641 is not impaired even after the cover plate 64 has hit the stop 14.
  • the feeder 5 is always mounted on a pivot axis 52 (see FIGS. 1 to 4, 6 and 7) or 54 (see FIG. 5).
  • the feeder 5 can also be mounted on a carriage (not shown) which can be moved along a straight or curved guideway.
  • the feeder 5 (swivel arm 50) and the swivel arm 6 (FIG. 6) or the bearing piece 62 (FIG. 7) are always in common seed pivot axis 52 stored. It is understood that with a horizontal arrangement of the pivot axis 54 for the feeder 5, a corresponding arrangement of the pivot arm 6 or the bearing piece 62 - with corresponding design adjustment - on the same pivot axis 54 is also possible, as well as then a common support for the two stops 7 and 74 can be provided.
  • the feeder 5 is displaceable in a backdrop, it is also possible to provide a correspondingly displaceable part with the cover plate 60 or 64 instead of the swivel arm 6, the movement of which is coupled to a stop corresponding to the stop 14 until it runs up.
  • a common carrier 73 or 75 is provided for the two stops 7 and 72 (FIG. 4) or 7 and 74 (FIG. 5), this can be mounted independently of the feeder 5.
  • an arrangement of carrier 73 and feeder 5 on one and the same pivot axis 52 or 54 - regardless of whether it is arranged vertically according to FIG. 4 or horizontally according to FIG. 5 - is particularly advantageous since it is at compact and simple design enables a particularly safe and precise setting of the two stops.
  • the first stop 7 is pulled vertically out of the essentially horizontal pivoting paths of the feeder 5 so that it can be pivoted into its thread insertion position 5b.
  • the first stop 7 remain unchanged in place and a counter stop provided on the feeder 5 (not shown) is actuated in order to pull it away from the area of the stop 7.
  • a type of gear (not shown), the axis of which is arranged transversely to the path of movement of the feeder 5 and the teeth of which serve as stops for the feeder 5. The stop is activated by locking the gearwheel, while the feeder 5 is also released by releasing the gearwheel and can thus continue its pivoting movement.
  • the cutting device 8 operates in the manner of a hatchet-anvil device according to the exemplary embodiment shown, but other designs, e.g. like scissors, quite possible.
  • the thread length compensation when transferring the feeder 5 from the cutting position into the thread insertion position takes place in the described embodiment by pivoting the centering device 41, but it goes without saying that in addition or instead of the pivoting movement of the centering device 41, a correspondingly designed thread guide curve can also be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
EP90108512A 1989-06-09 1990-05-07 Dispositif et procédé pour rattacher le fil sur un métier à filer à bout libre Expired - Lifetime EP0401516B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3918946A DE3918946A1 (de) 1989-06-09 1989-06-09 Vorrichtung und verfahren zum anspinnen eines fadens an einer offenend-spinnvorrichtung
DE3918946 1989-06-09

Publications (2)

Publication Number Publication Date
EP0401516A1 true EP0401516A1 (fr) 1990-12-12
EP0401516B1 EP0401516B1 (fr) 1994-12-14

Family

ID=6382471

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90108512A Expired - Lifetime EP0401516B1 (fr) 1989-06-09 1990-05-07 Dispositif et procédé pour rattacher le fil sur un métier à filer à bout libre

Country Status (5)

Country Link
US (1) US5083420A (fr)
EP (1) EP0401516B1 (fr)
JP (1) JPH0397926A (fr)
CS (1) CS286390A2 (fr)
DE (2) DE3918946A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1970475A3 (fr) * 2007-03-15 2008-12-24 Rieter Ingolstadt GmbH Dispositif de démarrage de filage automatique dans un métier à filer de type open-end

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Publication number Priority date Publication date Assignee Title
IT1258920B (it) * 1991-05-11 1996-03-01 Procedimento e dispositivo per l'allacciamento del filo di un dispositivo di filatura ad estremita' aperta
JPH07122167B2 (ja) * 1992-03-16 1995-12-25 村田機械株式会社 紡績装置の糸継ぎ方法
DE4443818B4 (de) * 1994-12-09 2005-08-18 Saurer Gmbh & Co. Kg Kreuzspulen herstellende Textilmaschine
DE10139078A1 (de) * 2001-08-09 2003-02-20 Schlafhorst & Co W Verfahren und Vorrichtung zum Wiederanspinnen einer Offenend-Spinnmaschine
DE102007039767A1 (de) * 2007-08-22 2009-02-26 Rieter Ingolstadt Gmbh Vorrichtung zum Abwerfen eines Fadenendes
KR101868802B1 (ko) * 2016-08-30 2018-06-20 상명대학교산학협력단 합사장치
CZ2021500A3 (cs) 2021-11-01 2023-05-10 Rieter Cz S.R.O. Způsob oddělení konce příze před obnovením předení na textilním stroji pro výrobu příze, zařízení k jeho provádění a textilní stroj pro výrobu příze

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DE2437002A1 (de) * 1974-08-01 1976-02-19 Zinser Textilmaschinen Gmbh Vorrichtung zum anspinnen an offenend-spinnmaschinen
EP0162367A1 (fr) * 1984-05-19 1985-11-27 Rieter Ingolstadt Spinnereimaschinenbau AG Procédé et dispositif pour la préparation de l'extrémité de fil pour la remise en route d'une machine à bout libéré
EP0274016A2 (fr) * 1982-01-26 1988-07-13 Rieter Ingolstadt Spinnereimaschinenbau AG Procédé et dispositif de rattache pour machine de filature à bout libre

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DE2350842C3 (de) * 1973-10-10 1979-04-26 Fritz 7341 Bad Ueberkingen Stahlecker Vorrichtung zum Anspinnen eines Fadens bei einem Offenendspinnaggregat
DE2361787C3 (de) * 1973-12-12 1981-05-27 Stahlecker, Fritz, 7347 Bad Überkingen Entlang einer Offenend-Spinnmaschine verfahrbare Vorrichtung zum Anspinnen
DE2647048A1 (de) * 1976-10-19 1978-04-27 Schlafhorst & Co W Vorrichtung zum ruecktransport des fadenendes einer auflaufspule zum abzugsrohr einer rotorspinnmaschine
DE3121759C2 (de) * 1981-06-02 1983-03-17 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Fliegend gelagerte drehbare Zentrierspindel
JPS5930923A (ja) * 1982-08-12 1984-02-18 Toyoda Autom Loom Works Ltd オ−プンエンド精紡機の糸継ぎ方法
CS241423B1 (en) * 1983-05-16 1986-03-13 Jiri Nemec Device for automatic yarn return from take-up bobbin
DE3542366C2 (de) * 1985-11-30 1995-06-14 Schlafhorst & Co W Verfahren zum Wiederanspinnen eines Fadens

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Publication number Priority date Publication date Assignee Title
DE2437002A1 (de) * 1974-08-01 1976-02-19 Zinser Textilmaschinen Gmbh Vorrichtung zum anspinnen an offenend-spinnmaschinen
EP0274016A2 (fr) * 1982-01-26 1988-07-13 Rieter Ingolstadt Spinnereimaschinenbau AG Procédé et dispositif de rattache pour machine de filature à bout libre
EP0162367A1 (fr) * 1984-05-19 1985-11-27 Rieter Ingolstadt Spinnereimaschinenbau AG Procédé et dispositif pour la préparation de l'extrémité de fil pour la remise en route d'une machine à bout libéré

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1970475A3 (fr) * 2007-03-15 2008-12-24 Rieter Ingolstadt GmbH Dispositif de démarrage de filage automatique dans un métier à filer de type open-end

Also Published As

Publication number Publication date
US5083420A (en) 1992-01-28
DE59007981D1 (de) 1995-01-26
EP0401516B1 (fr) 1994-12-14
CS286390A2 (en) 1991-12-17
DE3918946A1 (de) 1990-12-13
JPH0397926A (ja) 1991-04-23

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