EP0108195B1 - Fadenspeicher - Google Patents

Fadenspeicher Download PDF

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Publication number
EP0108195B1
EP0108195B1 EP83107199A EP83107199A EP0108195B1 EP 0108195 B1 EP0108195 B1 EP 0108195B1 EP 83107199 A EP83107199 A EP 83107199A EP 83107199 A EP83107199 A EP 83107199A EP 0108195 B1 EP0108195 B1 EP 0108195B1
Authority
EP
European Patent Office
Prior art keywords
thread
catching
retaining device
store
store according
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.)
Expired
Application number
EP83107199A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0108195A1 (de
Inventor
Erich Dipl.-Ing. Bock
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.)
Rieter Ingolstadt Spinnereimaschinenbau AG
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.)
Filing date
Publication date
Application filed by Schubert und Salzer Maschinenfabrik AG filed Critical Schubert und Salzer Maschinenfabrik AG
Publication of EP0108195A1 publication Critical patent/EP0108195A1/de
Application granted granted Critical
Publication of EP0108195B1 publication Critical patent/EP0108195B1/de
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D04B15/482—Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • B65H51/22—Reels or cages, e.g. cylindrical, with storing and forwarding surfaces provided by rollers or bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/003—Arrangements for threading or unthreading the guide
    • 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 present invention relates to a thread store with a drivable storage roller, which has at its free end a thread catching and retaining device which can catch and release the thread, further two thread guides associated with this thread store, through which the thread is passed outside the effective range of the thread catching device , wherein one of the thread guides enables tangential thread winding onto the storage roller, while the second thread guide enables the thread to be drawn off via the free end of the storage roller.
  • Such thread stores are known in a wide variety of designs (DE-OS 2 555 802, DE-OS 2 607 460, FR-OS 2 031 995).
  • the thread is always fed tangentially to the storage roller, loops around it several times and leaves the storage surface in the axial direction between the storage roller and a brake ring placed at the end of the drain, for which purpose the thread must be passed through an annular thread guide.
  • Such thread stores are used in yarn-processing machines such as knitting machines, knitting machines and weaving machines (DE-OS 2 555 802, FR-OS 2 031 995), but also in yarn-producing machines, in particular open-end spinning machines (DE-OSs 2 553 892 and 2 717 314 ).
  • the object on which the present invention is based is therefore to create a thread store of the type mentioned at the outset, which makes it possible in a simple manner to apply the thread to the store.
  • a further object of the invention is to further develop the thread store in such a way that it can only be temporarily brought into the thread path and can store the thread without interrupting the thread path.
  • a third thread guide which can be opened and closed, one part of the thread guide being arranged in an extension of the axis of the storage roller, while the other part serving for opening and closing is designed as a thread feeder, which is at its closing movement brings the thread laid out between the thread guides into the area of the thread catching and retaining device and causes the thread to be released when it is moved into the open position.
  • the thread guide which can be opened and closed again, prevents cumbersome threading. This design therefore makes it possible to place an uninterrupted thread on the thread store for temporary storage and then to release it completely again through the thread store.
  • the third thread guide is expediently assigned to the thread storage device and the thread connecting device. In this way, the thread connecting device can be arranged very close to the thread store, which results in a compact design.
  • the thread feed disk which is conventional in such thread stores, can be omitted.
  • the storage roller is adjustable in the axial direction with respect to the first thread guide and the third thread guide. As a result, each new turn is neatly deposited next to the turn previously stored on the storage roller.
  • the feed movement of the thread store with the storage roller - or also the storage roller in the thread store - can be controlled with the aid of means which also bring the thread store from a rest position into a working position.
  • the thread catching and retaining device to which the thread can be fed by the closing movement of the part of the third thread guide designed as a thread feeder, is formed by a thread retaining ring that can be driven relative to the storage roller.
  • this thread catching and retaining device is advantageously made of plastic.
  • the thread catching and retaining device is preferably arranged at the outlet end of the storage roller. As a result, the thread can be picked up particularly easily by the memory.
  • the thread catching and retaining device is seated in the storage roller.
  • the thread catching and retaining device is advantageously acted upon elastically radially inwards, while an axially displaceable adjusting cone is provided in the storage roller, which can be brought into action on the inner end of the thread catching and retaining device.
  • this can be guided against rotation in the storage roller and can carry at its inner end a wheel oriented in the circumferential direction of the storing roller for supporting the thread catching and retaining device on the adjusting cone.
  • An embodiment of the subject matter of the invention has proven to be extremely advantageous, in which the storage roller extends beyond its end continues in the form of a tapered truncated cone, on the lateral surface of which the thread catching and retaining device is arranged.
  • the arrangement of the thread catching and retaining device in the immediate vicinity of the larger diameter of the truncated cone is particularly advantageous, since in this way, by arranging the thread store relative to the thread path in such a way that the surface line and thread path take an essentially parallel course, the thread by the surface line of the truncated cone, which is relatively slightly superior to the thread catching and retaining device, can be easily removed.
  • the thread can be picked up by changing the thread path or by changing the position of the thread catching and retaining device relative to the thread path.
  • the thread catching and retaining device is preferably seated in the peripheral surface of the truncated cone.
  • the thread catching and retaining device is not necessarily driven.
  • a torque motor can be provided for this.
  • the storage roller can preferably be driven via a slip clutch. It is expedient if the thread catching and retaining device can be driven relative to the storage roller.
  • both the storage roller and the thread catching and retaining device expediently each carrying a hysteresis disc and on the common one Drive shaft between these two hysteresis disks a permanent magnet is arranged.
  • the thread catching and retaining device has a hook which has an open throat in the drive direction, it being possible to increase the service life that the thread catching and retaining device has a ceramic insert in its throat.
  • the thread store is not always required, but only for certain work phases, then according to the invention, in the case of a textile machine with a large number of work stations and a maintenance device passing by these work stations, which can optionally be assigned to these work stations, it is provided that when the thread catcher is brought into the thread run -and -retaining device, the discharge end of the storage roller is closer to the thread run than its feed end.
  • the thread storage device designed according to the invention permits an extremely versatile application. So he can in all known applications, for. B. in weaving, knitting and warp knitting machines, but also in open-end spinning devices, as previously used stationary.
  • the preparation of the work, in which the thread is brought to the predetermined thread path, is made considerably easier here since the thread can be threaded into the thread store without an open thread end having to be available for this. Rather, in the inventive design of the thread store, it is possible to insert the continuous thread into the thread store from the side. This opens up completely new uses for the thread store, since such a thread store can now also be used if it is only to be delivered to the job for a short time for a very specific work phase.
  • the thread store can therefore assume any standby position in the vicinity of the work station or else on a maintenance device which has to look after a large number of work stations of the same type.
  • considerable space and material savings are achieved, especially if the thread store on machines with a large number of similar workplaces - for example, B. on an open-end spinning machine - application.
  • the thread store 1 which is shown in FIGS. 1 and 4, can in principle be used on all textile machines on which thread store 1 with a storage roller 10 is used, for example on knitting and knitting machines or also on weaving machines.
  • the working conditions on an open-end spinning machine are even more difficult compared to the aforementioned machines, in particular if the thread store 1 is to be arranged on a movable maintenance device 2, the structure and function of the thread store 1 are explained below using the example of an open-end spinning machine.
  • FIG. 1 of an open-end spinning machine of this type, only the spinning device 3 indicated by a square, a pair of draw-off rollers 30 and a winding device 6 are shown.
  • a thread 31 produced in the spinning device 3 is drawn off from the spinning device 3 with the aid of the pair of draw-off rollers 30 and then fed to the winding device 6, where the thread 31 is wound onto a sleeve to form a bobbin.
  • the maintenance device 2 which can be moved along the open-end spinning machine and thus can operate a large number of spinning positions of this machine in succession, is brought in a known manner for this operation into the thread course between the draw-off roller pair 30 and the thread take-up point designed as a winding device 6.
  • the winding device 6 is assigned a drive device (not shown) which can be controlled by the maintenance device 2.
  • the maintenance device 2 in the exemplary embodiment shown has a pair of auxiliary take-off rollers 20 which is driven by a motor 21 via a belt 22.
  • the thread path 32 of the thread 31 in the take-off is thus defined by the draw-off roller pair 30, which forms a first thread guide for the thread 31, and the auxiliary roller pair 20, which forms a second thread guide for the thread 31.
  • the maintenance device 2 has, in addition to the thread run 32 in the thread running direction defined by the draw-off roller pair 30 of the open-end spinning machine and the auxiliary draw-off roller pair 20 of the maintenance device 2, the thread store 1 already mentioned and a thread connecting device 23, which can be designed differently, for example as a knotting device.
  • the thread store 1 shown in FIG. 1 has a base 11, with the aid of which it is mounted on the maintenance device 2 rigidly or pivotably on a lever or linkage.
  • the base 11 in turn has a hub 110 in which a drive shaft 12 is mounted via one or more bearings 111.
  • the already mentioned storage roller 10 is mounted on the shaft 12, which has driving slots 102 on its feed end 101 facing the base 11.
  • a thread feed disk 13 is toothedly engaged with these drive slots 102, which is rotatably mounted on the hub 110 of the base 11 with the aid of a bearing 130 and is thus carried along by the storage roller 10 when the latter is rotated.
  • the thread feed disk 13 is inclined in a known manner with respect to the axis 122 of the storage roller 10 formed by the drive shaft 12 in order to effect the required thread feed.
  • the base 11 has a cylindrical jacket 112, which partially envelops the thread feed disk 13 on its circumference, but on the other hand allows it to protrude beyond the end face of the jacket 112 to such an extent that it can exert the required feed action on the thread.
  • a rotary drive 120 is connected, which is designed as a motor according to Figure 1, but other drives - z. B. transmissions that are driven by other driven elements - find application.
  • This rotary drive 120 is carried by the base 11 of the thread store 1.
  • the drive shaft 12 carries an end plate 121 which rotates together with the shaft 120 at the same speed.
  • a thread catching and retaining device designed as a thread retaining ring 14 is rotatably mounted on the shaft 12 by means of a bearing 140 between the end plate 121 and the storage roller 10.
  • the thread retaining ring 14 covers with a short circumferential surface 142 both the outlet end 103 of the storage roller 10 and the outer circumference of the end plate 121 in order to exclude the risk of the thread 31 being caught between the thread retaining ring 14 and the storage roller 10 on the one hand and the end plate 121 on the other hand.
  • FIGS. 2 and 3 A part of the thread retaining ring 14 is shown in FIGS. 2 and 3.
  • the thread retaining ring 14 has a plurality of thread retainers 141 on its circumference, but a single thread retainer 141 of this type may also suffice.
  • the thread retainer 141 is or the thread retainer 141 is designed to be open radially outward, so that a thread 30 is outside can be brought into the engagement area of the thread retainer 141.
  • the thread retainer 141 has the shape of a hook that has an open throat 144 in the drive direction 145 (see FIG. 2) of the thread retainer ring 14. To protect against wear, this throat 144 according to FIG. 3 is equipped with a ceramic insert 146.
  • the bearing 100 of the storage roller 10 is arranged at a distance from its outlet end 103, so that the storage roller 10 encloses a space 15 with a radial wall 104 together with the thread retaining ring 14.
  • a permanent magnet 150 is arranged on the drive shaft 12 in this space 15 at a distance from the radial wall 104 and also from the thread retaining ring 14.
  • the storage roller 10 carries a hysteresis disk 105 on the side of its radial wall 104 facing the permanent magnet 150, while the thread retaining ring 14 carries a hysteresis disk 143 on its side facing the permanent magnet 150.
  • the two slip clutches designed as hysteresis clutches are thus driven by the shaft 12 via a single permanent magnet 150.
  • a third thread guide 4 which consists of two relatively movable thread guide parts 40 and 41.
  • the thread guide part 40 is carried stationary by the maintenance device 2, while the thread guide part 41 is movably carried by the maintenance device 2 and is designed as a thread feeder.
  • both thread guide parts 40 and 41 are fork-shaped, wherein the thread guide part 41 is pivotally mounted on the pivot axis 42.
  • the thread guide part 41 can be brought from a standby position 410 into the closed position shown, whereby it detects the thread 31 following the thread run 32 and takes it into the position shown in FIG. 2, in which the thread 31 between the thread guide parts 40 and 41 is included and led.
  • the storage roller 10 is assigned a rotation monitoring device which comprises a button 50 which scans the thread retaining ring 14. This is connected to a pulse counter 5, with which the thread connecting device 23 is also connected in terms of control.
  • the pulse counter 5 is in turn connected to the motor 21 of the auxiliary take-off roller pair 20 via a control device 51.
  • the mouth 240 of a movable suction tube 24 is arranged in the vicinity of the thread run 33 between the pair of draw-off rollers 30 and the thread store 1, while the mouth of a suction tube 26 is arranged in the vicinity of the thread run after the auxiliary draw-off roller pair 20.
  • a thread monitor 25 which is connected via a control device 250 to the rotary drive 120 of the thread store 1 and to a delivery device for feeding a sliver to be broken down into individual fibers to the spinning device 3. Furthermore, a thread deflection device 27 is located between the thread monitor 25 and the winding device 6.
  • the thread store 1 is here with its axis 122 at an acute angle a to the thread run 32, the outlet end 103 being closer to the thread run 32.
  • the rotary drive 120 of the thread store 1 drives the storage roller 10 and the thread retention ring 14 via the shaft 12, the permanent magnet 150 and the hysteresis disks 105 and 143, which follow this drive movement unhindered.
  • the speed of the drive shaft 12, the storage roller 10 and the thread retaining ring 14, which initially rotate synchronously, is selected so that the peripheral speed of the storage roller 10 is higher than the speed at which the thread 31 is drawn off from the spinning device 3 by the draw-off roller pair 30.
  • the thread guide part 41 is brought out of its ready position 410 into the closed position shown, in which the thread section extending to the pair of auxiliary draw-off rollers 20 is enclosed between the thread guide parts 40 and 41.
  • This thread section thereby comes into the path of the rotating thread retainer 141, which is prevented from further circulation by this thread section, which is held taut by the auxiliary pulling roller pair 20 rotating at the same speed as the pulling roller pair 30.
  • the storage roller 10 rotates at an undiminished speed.
  • the thread section is initially further drawn off by the pair of auxiliary draw-off rollers 20 and discharged by the suction tube 26 following this pair of auxiliary draw-off rollers 20.
  • the other thread section which extends from the winding device 6 to the mouth 240 of the suction tube 24, is guided in such a way that it does not get into the thread store 1.
  • the two thread sections to be connected are guided in parallel in the manner described by the thread deflection device 27 and the suction pipe 24 or by the thread guide 4 and the auxiliary take-off roller pair 20, so that they can be securely picked up by the thread connecting device 23 for thread connection.
  • the thread retaining ring 14 of the thread store 1 acts like a thread compensation element. If the thread tension temporarily decreases a bit, the thread retaining ring 14 rotates in the drive direction 145 and thereby causes a certain wrap around the storage roller 10, which is released again when the thread tension rises again, for example after the thread connection has ended.
  • the thread connecting device 23 then begins its work, the thread sections to be connected to one another having to be stopped.
  • the thread connecting device 23 stops the motor 21 via the control device 5, so that the auxiliary draw roller pair 20 is also stopped.
  • the thread section which is still produced by the spinning device 3 and is subsequently supplied by the pair of draw-off rollers 30 thus relaxes, so that the thread retainer 141, which had previously grasped this thread section, now begins to circulate as well.
  • the subsequent length of thread thus arrives at the storage roller 10 and is deposited there, the thread feed disc 13 in a manner known per se from the feed end 101 of the storage roller 10 to the end of the storage roller 10 so far that the new turns always between can store the existing turns and the thread feed disc 13.
  • the storage roller 10 is slowly reduced to the thread delivery speed, which is predetermined by the speed of the draw-off roller pair 30.
  • the thread retaining ring 14 with the thread retainer 141 also follows this speed change, since only fluctuations on the outlet side of the thread store 1 lead to relative movements between the storage roller 10 and the thread retaining ring 14.
  • the thread guide 4 is in the extension of the axis 122 of the thread store 1, so that no tension changes occur from the thread run-off side of the thread store 1, the thread retaining ring 14 and the storage roller 10 rotate synchronously.
  • the revolutions of the thread retention ring 14 represent a measure of the thread supply located on the storage roller 10. Therefore, the revolutions of the thread retention ring 14 can serve to measure the amount of thread stored on the storage roller 10. For this reason, the storage roller 10 is assigned the rotation monitoring device, the button 50 of which essentially contains a light source and a photocell or is designed as an induction button. The rotation monitoring device thus photoelectrically or inductively determines the passages of the thread retainer (s) 141 as long as the thread connecting device 23 is carrying out its work.
  • a thread excess which occurs briefly due to the start or end of work of the thread connecting device 23, can also be stored by the thread store 1, the thread retaining ring 14 briefly running in relation to the storage roller 10 in the drive direction 145, which Also detected by the rotation monitoring device and registered in the form of pulses from the pulse counter 5.
  • the thread connecting device 23 When the thread connecting device 23 has finished its work, it issues a corresponding control command to the winding device 6 via the control device 51, which now begins its winding work again. As a result of the winding tension, the thread reserve accumulated on the thread store 1 is reduced.
  • the control pulse delivered by the thread connecting device 23 to the control device 51 changes the pulse counter 5 to counting down.
  • the thread connecting device thus fulfills the task of a device for determining the direction of rotation of the thread retaining ring 14, since when the thread 31 is pulled off the storage roller 10, the thread retaining ring 14 is rotated by the pulled thread 31 against the drive direction 145 of the storage roller 10.
  • Such a device for measuring the filling state of the storage roller 10 with the aid of a pulse counter has the advantage that it works independently of the thread speed, the thread thickness, the speeds of the thread storage device and the dimensions of the thread storage device. This also applies regardless of the storage period.
  • the thread 31 must always be kept under tension. This is done by the thread retaining ring 14 driven by the permanent magnet 150 and the hysteresis disk 143. It is therefore only possible to pull the thread 31 off the storage roller 10 to the extent that there are differences in the delivery speed to the thread store 1 - that caused by the rotational speed of the pair of withdrawal rollers 30 - and the take-off speed from the thread store 1 - which is given first by the speed of rotation of the auxiliary take-off roller pair 20 and later by the winding speed of the winding device 6 or by the absence of a take-off when the thread connecting device 23 is working - tension differences occur in the thread 31.
  • the thread retaining ring 14 with its thread retainer 141 thus acts as a retaining element that only allows the amount of thread that corresponds to the actual excess speed of the specified take-off speed corresponds to the delivery speed, the storage roller 10 can leave.
  • the maintenance device 2 can leave the spinning station and drive to another spinning station in order to carry out its work there again.
  • the rotary drive 120 does not need to have its own drive motor, but the shaft 12 can be driven via appropriate ratios from any rotating part of the maintenance device 2 suitable for this purpose, if provided, or from the machine.
  • a common permanent magnet 150 for driving the storage roller 10 and the thread retaining ring 14 two separate, spatially separate permanent magnets can also be provided, so that the drive clutches designed as slip clutches for the storage roller 10 and the thread retaining ring 14 are completely independent of one another.
  • the necessary torques and powers of the hysteresis clutches must be selected in accordance with the circumstances and, if necessary, adjusted by changing the distance between hysteresis disk 143 or 104 and permanent magnet 150.
  • separate permanent magnets, adjustable on the drive shaft 12, for the two hysteresis disks 143 and 104 are particularly advantageous.
  • the storage roller 10 and the thread retaining ring 14 to have separate drives, e.g. B. torque motors to provide.
  • the thread retaining ring 14 can also be driven via a friction clutch from the storage roller 10, a felt bearing etc. being used as the friction clutch.
  • driving the thread retaining ring 14 independently of the storage roller 10 has the advantage that thread tension drops occurring on the side downstream of the thread storage means 1 can also be compensated for by the thread retaining ring 14, based on the thread path.
  • the drive described with reference to FIG. 1 is particularly advantageous because it is extremely compact, does not require any electrical lines reaching into the interior of the thread store 1 and can even compensate for thread tension drops occurring after the thread store 1.
  • the thread retaining ring 14 can also be designed differently and can also be made of different materials. So it is useful, but not necessary in all cases, if the thread catcher (s) 141 are designed as hooks, since in this way a particularly rapid pick-up of the thread 31 is ensured by the thread retainer 141 crossing the thread path 34. If a thread retainer 141 designed as a hook is provided, its throat 144 is open in the direction of rotation 145 predetermined by the direction of rotation of the rotary drive 120, since this keeps the thread 31 particularly securely both when winding onto the thread store 1 and when it is being pulled away from the thread store 1 and is led.
  • the thread retention ring 14 can be made of metal and can be protected by ceramic inserts 146 in the area of the throats 144 of the thread retainer 141. It is also possible, instead of ceramic inserts, to provide 146 small wheels, the axis of which is oriented in such a way that the wheels can rotate in the direction of the thread, whereby the friction is reduced.
  • a thread retaining ring 14 made of plastic is particularly advantageous since the thread retaining ring 14 should have the lowest possible moment of inertia due to the need to be able to accelerate the thread retaining ring 14 quickly when the memory begins. To increase the wear resistance of an existing plastic retaining ring 14 this can be coated, for. B. chrome, thread retainer 141, which not only increases the service life, but at the same time the sliding values between thread 31 and thread retaining ring 14 are reduced.
  • the openable and closable third thread guide 4 can also be designed differently.
  • an embodiment of the thread guide 4 may be sufficient, which has an eyelet shape with an arcuate section which is held elastically in contact with the circular arc-shaped rest of the thread guide 4 and by Can be opened manually or automatically against the action of a spring.
  • the shown embodiment of a divisible thread guide 4 with two thread guide parts 40 and 41 which can be removed from one another is particularly advantageously suitable as a thread feeder with which the thread 31 is moved into the position in extension of the axis 122 of the thread store 1 by a pivoting or pushing movement of the movable thread guide part 41 can be brought between the two thread guide parts 40 and 41.
  • the thread store 1 in a suitable manner for the thread run 32 to ensure that the thread 31 crosses the path of the thread retainer 141 without the aid of a thread feeder and - possibly with the aid of the thread retainer 141 - into the correspondingly controlled thread guide 4 reached.
  • This thread guide 4 can also be arranged in a thread connecting device 23 arranged in the thread running direction after the thread storage device 1 in such a way that it is not only assigned to the thread storage device 1, but also to the thread connecting device 23 and the thread 31 of this thread connecting device 23 in a manner such as this is necessary for the later work of the thread connecting device 23.
  • the device for determining the thread circulation direction can also be designed differently. In the above-described embodiment, this is formed by the thread connecting device 23, since the thread store 1 increases or reduces the stored thread supply depending on its work. However, it is also possible to assign a pair of buttons to the thread retaining ring 14 or the storage roller 10, which determines in a manner known per se in which direction the thread rotates. Such a pair of buttons also enables a precise determination of the point in time at which the thread changes its direction of rotation. The winding device 6 can thus be switched on very smoothly, so that the direction of rotation of the thread also changes with a delay relative to the working end of a thread connecting device 23, without falsifications in the value stored by the pulse counter 5.
  • filling monitoring can also be omitted.
  • the timing element can be preset differently so that different times for thread connection, different thread delivery and withdrawal speeds, different tensioning delays including sufficient security etc. can be taken into account during this time.
  • a pulse counter 50 is provided there, which determines by counting up and down whether the storage roller 10 is filled or emptied. Instead, however, it can also be provided that the thread feed disk 13 is acted upon elastically in such a way that it actuates a switch when thread turns are present and, when the thread turns are released - that is, when the storage roller 10 is empty - releases this switch by the action of the loading force. Or it is one of the driving slots in the direction of the discharge end of the storage roller 10 extended and receives an arm that is normally pushed outward by the action of a spring over the circumferential surface of the storage roller 10.
  • thread store 1 can be assigned to several workstations in succession - e.g. for storage on a swivel arm, with the help of which the thread store can be assigned to at least two adjacent workplaces, or also for storage on a maintenance device 2 that can be passed by a large number of workplaces, it is advantageous if the thread store 1 is quickly emptied again and thus by can be withdrawn from this job very soon.
  • the control device 51 shown in FIG. 1 is not only able to switch the motor 21 and the winding device 6 on and off, but is also designed as a speed control.
  • This speed control which, as shown, is connected to the pulse counter 5 (or a differently designed filling monitor and the thread connecting device 23), receives a signal from the thread connecting device 23 to stop the auxiliary take-off roller pair 20 and the winding device 6 when the work begins Rotation monitoring device 50 now registers the circulation of the thread retaining ring 14.
  • the control device 51 which now commands the winding device to pull the thread 31 from the storage roller 10 at an increased speed.
  • the pulse counter 5 sends a corresponding signal to the control device 51, which now reduces the speed of the winding device 6, for example temporarily increased by 30%, to the normal production speed. This takes place in a graded manner or continuously in such a way that the use of the stored thread reserve coincides with the reaching of the normal winding speed.
  • the control device 51 has a digital / analog converter, which converts the number stored by the pulse counter 5 into an analog value.
  • This analog value controls the speed of the winding device, and by means of a corresponding design of the control device 51 it can be achieved that a predetermined maximum value is never exceeded.
  • This maximum value is a target value, which thus characterizes the highest winding speed.
  • the actual value which must be compared with this, results from the sum of the value characterizing the normal winding speed and the analog value derived from the pulse counter 5. If this sum (actual value) is lower than the target value, it determines the speed of the winding device 6, while if this actual value exceeds the target value, the target value determines the speed of the winding device 6. In this way, a smooth speed transition of the winding device 6 to the normal winding speed can be achieved.
  • the suction tube 24 holds the thread section extending to the winding device 6 during the thread connection. It is also possible that the suction pipe 24 has the thread section for this purpose only from the winding device 6 or a transmission device that has removed the thread from the winding device 6. However, during the thread connecting work, or at least at the beginning of this work, when the thread connecting device 23 picks up the thread section, the mouth 240 of the suction tube 24 assumes the position 241 shown in broken lines, but then moves into the position shown in FIG. 1 with a solid line. In this position, the suction pipe 24 fulfills the task of collecting the thread 31 released by the thread store 1 when it is emptied, which thread 31 now temporarily assumes the thread path 35. Due to the normal tension delay when winding, this thread excess is used up practically without significant tension fluctuations, so that the quality of the turns on the bobbin is not impaired.
  • the thread monitor 25 If the thread connection process has failed, this is determined by the thread monitor 25. The latter then immediately interrupts the feed of the thread 31 to the thread store 1 and for this purpose is controlled by the control device 250 with the device for producing (spinning device 3) or for delivering the thread 31 (take-off device for pulling the thread from a spool, e.g. in a yarn processing or yarn treating machine). The subsequent delivery of the thread 31 to the thread store 1 is thus prevented. It is now necessary to free the storage roller 1 from its thread 31 in order to avoid excessive amounts of storage. Of course, this can be done by hand.
  • the thread monitor 25 is additionally connected to the rotary drive 120 of the thread store 1 via the control device 250.
  • the thread store 1 can also be emptied in other ways.
  • the thread guide 4 has a pair of rollers (not shown) with a pressure roller that can be lifted off, which pulls the thread off the thread store 1 when a thread break occurs and feeds it to a further suction device, not shown.
  • the thread store 1 is in a position inclined to the thread run 32 at an acute angle ⁇ , since it is then easiest to feed the thread 31 to the thread store 1.
  • other arrangements of the thread store 1 to the thread run 32 are also possible if appropriate stationary or movable thread guides ensure that the thread 31 can be brought into a path crossing the thread retainer 141.
  • the pulse counter 5 can control various processes, depending on the type of machine in which the thread store 1 is used. For example, when a certain value is reached, a device assigned to it, e.g. stop the delivery device of a spinning device 3. This is e.g. B. expedient if several successive attempts to connect the thread 31 to the thread connecting device 23 have failed, since otherwise the thread store 1 would overfill. Similarly, it may be necessary to stop a knitting machine when the pulse counter 5 has reached a certain value, since this indicates an error in the thread flow.
  • the pulse counter 5 can also be connected in terms of tax to the drive of a trigger device.
  • the take-off device is formed by the winding device 6.
  • this take-off device is formed by a knitting machine or the like or else by the thread store 1 itself if the take-off device 31 pulls the thread 31 from a supply spool and is not supplied with the aid of a pair of take-off rollers 30. In this case, the drive device 120 is stopped, so that the thread store 1 can no longer take up a thread.
  • FIG. 7 An exemplary embodiment of a thread store 7, which can be designed both with and without a thread catcher 8, is explained below with reference to FIG. In the following description, the reference symbols used there are also used for the elements which are unchanged from the corresponding elements from FIG. 1.
  • the thread store 7 according to FIG. 4 is shown in section in the upper half of the figure, but is shown in a side view in the lower half of this figure.
  • the thread store 7 also has a base 11, with the aid of which the thread store 7 in a suitable manner - for example in a maintenance device 2, in the example of an open-end spinning machine to stay - is stored.
  • a shaft 12 is in turn supported by means of a bearing 111, with which the storage roller 70 is connected in a rotationally fixed manner at one end.
  • the other end of the drive shaft 12 is connected to a rotary drive 120 (see FIG. 1, e.g. torque motor or other motor with an interposed slip clutch), so that the storage roller 70 is driven as a function of the resistance opposed to it by the thread 31.
  • the storage roller 70 has driving slots 102 on its feed end 101 facing the base 11, which, in contrast to the embodiment shown in FIG. 1, are sealed on the inside of the storage roller by an inserted ring 71.
  • the thread feed disk 13 engaging in these driving slots 102 is - likewise in contrast to the embodiment according to FIG. 1 - supported on its outside in the jacket 112 of the base with the aid of a bearing 113.
  • the storage roller 70 has at its outlet end 103 an annular bead 72 which merges into a tapered truncated cone 73.
  • the storage roller 70 has on its circumferential surface a multiplicity of uniformly distributed openings 75, which in the embodiment shown are designed as longitudinal slots.
  • a corresponding number of cylindrical bores, which are distributed over the storage length 74 such that the stored thread 31 is always in the area of influence of at least one such opening 75, can also be used, these openings 75 then advantageously being located on lines which loop around the storage roller 70 in a helical fashion.
  • a tubular section 76 adjoins the base 11 on the side facing away from the storage roller 70, into which the suction air nozzle 77 of a suction air line connected to a vacuum source (not shown) opens.
  • the section 76 is connected to the interior 78 of the storage roller 70 via bores 760 in the base 11.
  • the exemplary embodiment shown limits the storage length 74 of the storage roller 70 on its discharge side 103 by the annular bead 72 mentioned, since this creates an additional deflection for the thread 31 and thus additional friction surfaces for the thread to be drawn off.
  • the retention element of which is formed by openings 75 under suction air, but does not have such an annular bead 72, the retention effect is even better.
  • a thread catching and retaining device 8 is also provided here.
  • the thread catching and retaining device 8 is always carried along by the storage roller 70 during its rotational movement. So that the thread catching and retaining device 8 only works during its catching work, but does not otherwise hinder the pulling of the thread from the thread store 7, it is designed and stored in the storage roller 70 in such a way that it can be sunk in the storage roller 70 and the surface of the Storage roller 70 is no longer towering over.
  • the thread catching and retaining device 8 must also be open to the outside here, for which purpose - as shown in the example of FIGS. 2 and 3 - thread catchers designed as hooks can also be used.
  • a truncated cone 73 is connected on the side of the annular bead 72 facing away from the storage length 74 of the storage roller 70, the largest diameter of which corresponds to the diameter of the annular bead 72 and is increasing tapered towards its free end.
  • a bushing 80 for receiving the thread catching and retaining device 8 is mounted, which comprises a retaining pin 81.
  • the retaining pin 81 carries a plate 82 inside the sleeve 80, on the side facing the outside of the truncated cone 73 of which a compression spring 83 is supported, which in turn is supported on the outer bottom 84 of the sleeve 80.
  • a further bottom 85 of the bushing 80 is provided on the side facing the interior 78 of the thread storage device 7, against which the plate 82 rests when the inner end of the catch pin 81 is released.
  • an axially displaceable adjusting cone 9 is guided, which carries a support disc 90, which serves on the one hand to support the feed roller 70 and with which, on the other hand, several drive bolts 91 are connected, distributed uniformly over its circumference, which are connected by correspondingly distributed bores 114 in the base 11 secured against rotation.
  • the drive bolts 91 are provided with a suitable (not shown) stroke drive, for example a solenoid, a pneumatically or hydraulically actuated piston etc., connected.
  • the actual cone 92 On the side of the support disk 90 facing the truncated cone 73 is the actual cone 92, which can be brought to bear on the retaining pin 81 by relocating it along the drive shaft 12 of the thread store 7, or releases it again. Since the storage roller 70 and the drive shaft 12 rotate while the adjusting cone 9 is not rotating, suitable bearings can of course be provided between the adjusting cone 9 and the storage roller 70 on the one hand and between the adjusting cone 9 and the drive shaft 12 on the other hand.
  • the cone 92 comes into contact with the actuation of the lifting drive (not shown) via the drive bolts 91 the inner end of the retaining pin 81 or - if a plurality of retaining pins 81 are provided - brought to the inner ends thereof.
  • the retaining pin or pins 81 are pushed out of the surface of the truncated cone 73 of the storage roller 70 against the action of the compression springs 83 assigned to them.
  • the thread 31 is gripped by the retaining pin 81 or one of them during the rotation of the storage roller 70 and this causes the thread 31 to wind up on the thread store 7. During the time in which the withdrawal of the thread 31 from the thread store 7 has not yet been interrupted, the thread 31 is wound onto the storage roller 70 as quickly as it is drawn off, so that it initially remains with a single turn.
  • the lifting drive is also expediently used from the device which brings the thread take-up to a stop in the area of the thread connecting device 23 of the cone 9 actuated.
  • the thread connecting device 23 controls the lifting magnet for the drive bolts 91. If the lifting magnet drops off when the work of the thread connecting device 23 has ended, the cone 39 is withdrawn from the catch pin 81, which now releases the thread 31. However, due to the negative pressure acting in the openings 75, the thread 31 is retained on the surface of the storage roller 70 until an increased tension, which the winding device 6 exerts on the thread 31, pulls it off the storage roller 70 exactly as required.
  • the retaining pin 81 for example by non-round shape of the retaining pin 81 itself or its plate 82 and a corresponding guidance through the bushing 80 or its bottoms 84 and 85 - is secured against rotation and on its inside End carries a wheel 86, which is oriented in the circumferential direction of the storage roller 70 and rolls on the cone 90 when it comes into contact with the wheel 86.
  • the retention pin 81 can of course also be driven in a radial direction in a different manner than shown.
  • the inner end of the retaining pin 81 has a drive foot which is guided in a radial (not shown) wall of the storage roller 2 in one of two parallel guideways, with the drive foot of the retaining pin 81 moving from one to the other guideway by means of an adjustable switch can be transferred.
  • the switch can be operated mechanically or electromagnetically.
  • the two guideways are arranged concentrically to each other and only have switches, with the aid of which the drive foot can get from the inner to the outer guideway.
  • the retaining pin 81 is countersunk in the circumferential wall of the truncated cone 73, if the drive foot is in the outer track, the catch pin projects beyond the circumferential wall of the truncated cone.
  • the thread catching and retaining device 8 also at the cylindrical end of the storage length 74 of the storage roller 70 or on the circumference of the annular bead 72, so that the truncated cone 73 is not required.
  • the arrangement of the catch pin 81 in the truncated cone 73, in particular in the vicinity of its largest diameter, is particularly advantageous, since then by arranging the thread store 7 relative to the thread run 32 in such a way that the surface line of the truncated cone 73 is essentially parallel to the thread path and in the immediate vicinity thereof, the thread 31 can be caught by a relatively short retaining pin 81 and thus by a relatively short stroke of the adjusting cone 9, even if the thread guide 4 is not designed as a thread feeder.
  • this truncated cone 73 has a - non-controllable - thread catcher on its outer surface and this is brought into the area of the thread run 32 by shortening the axial distance between the thread store 7 and the thread guide 4.
  • the thread store 7 - or possibly only the storage roller 70 - is also adjusted relative to a feed point (pair of take-off rollers 30). It is therefore also possible to continue this movement even after the thread 31 has been caught, so that the thread 31 can be used even without the aid of a thread feed disc 13 To be able to deposit turn by turn on the storage roller 70, so that the thread feed disc 13 can also be omitted.
  • the suction tube 24 can also be omitted, while the suction tube 26 is not required in any case in knitting machines.
  • the auxiliary devices assigned to the thread store 1 or 7 are thus only present in certain machines or devices when the thread store 1 or 7 is used, while they can be omitted in others.
  • the thread monitor 25 is not required in all applications because, for example, the fill monitoring can interrupt the subsequent delivery of the thread 31 to the thread store 1 or 7 in the event of a thread break after the thread store 1 or 7.
  • the thread storage device 1 or 7 also has the advantage that the running or uninterrupted thread 31 can be applied to the thread storage device 1 or 7 and stored there at any time, but on the other hand the thread 31 can also be used again at any time without interrupting its thread travel from the thread storage device 1 or 7 can be removed.
  • the thread store 1 or 7 opens up a wealth of application areas and is not limited to the application examples discussed at an open-end spinning station, on a knitting, knitting or weaving machine, but can be used anywhere in the textile industry where it is to compensate for temporary thread tension fluctuations and the need to take up temporarily accumulating excess thread material in such a way that it can be fed directly to a thread take-up point when the temporarily stored thread quantity is used up.
  • a thread processing point e.g. a knitting, weaving or weaving point, but also a thread collecting point, e.g. B. the winding device 6 can be understood.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Knitting Machines (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Looms (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
EP83107199A 1982-10-16 1983-07-22 Fadenspeicher Expired EP0108195B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3238376 1982-10-16
DE19823238376 DE3238376C2 (de) 1982-10-16 1982-10-16 Fadenspeicher

Publications (2)

Publication Number Publication Date
EP0108195A1 EP0108195A1 (de) 1984-05-16
EP0108195B1 true EP0108195B1 (de) 1987-10-28

Family

ID=6175872

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Application Number Title Priority Date Filing Date
EP83107199A Expired EP0108195B1 (de) 1982-10-16 1983-07-22 Fadenspeicher

Country Status (9)

Country Link
EP (1) EP0108195B1 (ja)
JP (1) JPS59138563A (ja)
CS (1) CS264315B2 (ja)
DE (1) DE3238376C2 (ja)
GB (1) GB2128213B (ja)
HK (1) HK30187A (ja)
IN (1) IN161751B (ja)
MY (1) MY8700359A (ja)
SE (1) SE454876B (ja)

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DE4104863A1 (de) * 1991-02-16 1992-08-20 Fritz Stahlecker Vorrichtung zum zwischenspeichern eines fadens
JP4048902B2 (ja) * 2002-10-07 2008-02-20 村田機械株式会社 紡績機の糸弛み取り装置
JP3700706B2 (ja) * 2003-03-13 2005-09-28 村田機械株式会社 紡績機
EP1457446B9 (en) * 2003-03-13 2010-11-17 Murata Kikai Kabushiki Kaisha Tension control and slack eliminating device for a yarn winder
EP1457447B1 (en) * 2003-03-13 2012-06-06 Murata Kikai Kabushiki Kaisha Tension control and slack eliminating device for a yarn winder
DE102004057825A1 (de) * 2004-12-01 2006-06-08 Saurer Gmbh & Co. Kg Spulstelle einer Kreuzspule herstellenden Textilmaschine
JP2006306588A (ja) * 2005-04-28 2006-11-09 Murata Mach Ltd 繊維機械における糸の弛み取り装置
ITMI20060311A1 (it) * 2006-02-21 2007-08-22 Btsr Int Spa Dispositivo perfezionato di alimentazione di filo o filatio ad una macchina tessile e metodo per attuare tale alimentazione
JP2010077576A (ja) * 2008-09-29 2010-04-08 Murata Machinery Ltd 紡績機
JP2011173674A (ja) * 2010-02-24 2011-09-08 Murata Machinery Ltd 糸巻取機
CZ2012479A3 (cs) * 2012-07-12 2013-06-05 Rieter Cz S.R.O. Bubnový mezizásobník príze na pracovním míste textilního stroje a zpusob jeho rízení
CZ304712B6 (cs) * 2013-12-20 2014-09-03 Rieter Cz S.R.O. Bubnový mezizásobník příze pro textilní stroj
JP2016044016A (ja) * 2014-08-21 2016-04-04 村田機械株式会社 糸巻取装置及び自動ワインダ
DE102017110358A1 (de) * 2017-05-12 2018-11-15 Maschinenfabrik Rieter Ag Fadenberührendes Bauteil einer Kreuzspulen herstellenden Textilmaschine
JP2019038662A (ja) * 2017-08-25 2019-03-14 村田機械株式会社 糸ガイド部材、糸貯留装置、及び糸巻取機
EP4332036A1 (en) * 2021-04-28 2024-03-06 Shima Seiki Mfg., Ltd. Yarn length measurement device and knitting yarn buffer device

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Also Published As

Publication number Publication date
JPS59138563A (ja) 1984-08-09
DE3238376A1 (de) 1984-04-26
GB2128213B (en) 1986-08-13
GB2128213A (en) 1984-04-26
CS264315B2 (en) 1989-07-12
DE3238376C2 (de) 1984-08-09
JPH0413272B2 (ja) 1992-03-09
SE454876B (sv) 1988-06-06
SE8305087D0 (sv) 1983-09-21
MY8700359A (en) 1987-12-31
IN161751B (ja) 1988-01-30
CS626483A2 (en) 1988-09-16
GB8327371D0 (en) 1983-11-16
SE8305087L (sv) 1984-04-17
HK30187A (en) 1987-04-24
EP0108195A1 (de) 1984-05-16

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