EP0217373B1 - Fadenliefervorrichtung für Textilmaschinen - Google Patents

Fadenliefervorrichtung für Textilmaschinen Download PDF

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Publication number
EP0217373B1
EP0217373B1 EP86113492A EP86113492A EP0217373B1 EP 0217373 B1 EP0217373 B1 EP 0217373B1 EP 86113492 A EP86113492 A EP 86113492A EP 86113492 A EP86113492 A EP 86113492A EP 0217373 B1 EP0217373 B1 EP 0217373B1
Authority
EP
European Patent Office
Prior art keywords
thread
delivery device
peripheral zone
peripheral
arm
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 - Lifetime
Application number
EP86113492A
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German (de)
English (en)
French (fr)
Other versions
EP0217373A3 (en
EP0217373A2 (de
Inventor
Alan Gutschmit
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.)
Gutschmit Alan
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0217373A2 publication Critical patent/EP0217373A2/de
Publication of EP0217373A3 publication Critical patent/EP0217373A3/de
Application granted granted Critical
Publication of EP0217373B1 publication Critical patent/EP0217373B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates to a thread delivery device for textile machines with a rotatable thread storage part according to the preamble of claim 1.
  • the thread storage part is designed as a storage drum on which the thread in several turns for temporary storage and for forwarding the thread by winding or pulling it off the thread storage drum is arranged.
  • the term "thread” used here also means yarns, wires, ropes, cords, tapes or other continuous strand material.
  • the thread storage and delivery devices of the aforementioned patents have one or two thread storage drums or spools for: winding and unwinding the thread, taking precautions that the thread turns are on the drum move continuously in the axial direction from the thread take-up point to the thread take-off point.
  • a disc or a similar drive element is coaxially fixedly connected to the thread storage drum or thread storage spool in order to receive a rotary movement from the assigned textile machine or other machine in order to achieve winding and unwinding of the thread synchronously with the operation of the assigned machine.
  • thread storage and delivery devices One of the important purposes of such thread storage and delivery devices is to continuously store a small amount of the thread running off, so that in the event of a thread break between the thread delivery point and the textile machine, by means of suitable thread monitoring devices, the machine can be switched off before the end of the broken thread is drawn into the textile machine and can therefore no longer be connected by tying or otherwise connected to the broken end of the thread on the supply side.
  • thread delivery devices hereinafter referred to as thread delivery devices for short, are usually provided with a thread monitoring device, which is generally called "thread monitor", in order to detect a break in the running thread.
  • thread monitor In many known thread delivery devices, such a thread monitor is arranged in the thread passage direction in front of the storage drum, often a second thread monitor is also provided in the passage direction after the storage drum.
  • these thread monitors can often also switch off the textile machine for no apparent reason if the incoming thread has not broken, which is generally referred to as incorrect switching off. It is not fully known and understandable why such a false shutdown occurs and there are inconsistent opinions among experts in this regard, but it is assumed that natural tension fluctuations and vibrations in the moving thread between the thread supply point and the thread supply device sometimes cause a sufficient adjustment at the upper thread monitor to trigger a shutdown of the assigned textile machine.
  • a number of known thread delivery devices are provided with spring-loaded tensioning disks or similar thread brakes, through which the running thread is passed before reaching the thread delivery device and in front of the thread monitor.
  • the aforementioned U.S. Patents 3908921; 3,928,987; 3 952 554 and 4 106 713 show exemplary embodiments of such disk-like thread brakes in known thread delivery devices. It is assumed that these thread brakes are essentially only used to tension the thread in the area of a thread monitor and thereby to prevent incorrect switching off.
  • Disc brakes such as those shown in the aforementioned patents and other similar braking devices, cause additional thread tensions due to the friction they exert on the thread and which cause deleterious chafing and fiber build-up when processing spun threads, yarns or similar strands made from textile fibers , as well as occasional thread breaks if the thread tension level becomes too high.
  • Fluff production and accumulation only worsen existing environmental problems in many textile factories and also cause quality control problems by promoting the appearance of fiber rovings or knots. It is best to periodically remove the fluff accumulation on the braking devices, sometimes stopping the associated textile machine and reducing the production output and the efficiency of the machine accordingly.
  • the invention has for its object to provide a thread delivery device of the type mentioned in such a way that the occurrence of false shutdowns of the associated textile machine is prevented without a thread brake or any other device exerting additional tension on the running thread is required.
  • the object is achieved with a thread delivery device according to claim 1.
  • the inventive design ensures that the shutdown device is unaffected by thread tension changes that occur on the thread in the direction of travel before the first circumferential area, and only actual thread breaks are found.
  • the thread delivery device can preferably have a first and a second storage drum, the periphery of which in each case forms one of the two peripheral regions and which are arranged coaxially at a distance and are firmly connected to one another for a synchronous rotary movement.
  • An arrangement of pulleys arranged coaxially to the storage drums can expediently be provided for the drive.
  • the thread guiding device can advantageously be designed such that the thread is fed essentially tangentially and is also essentially tangentially derived from the peripheral region of each drum.
  • the monitoring switch-off device as a thread monitor advantageously has a pivotable arm which rests with its weight on the running thread in the area between the first and the second storage drum and which falls down under the force of gravity when the tension in the monitored thread running area is lost.
  • an additional thread monitor for monitoring the thread in the direction of passage can be arranged after the second thread storage drum in order to determine thread breaks that occur in the area between the thread delivery device and the textile machine.
  • a rotatably mounted head part can be provided, from which an arm carrying a thread guide eyelet extends outwards and with which the thread passed through the eyelet can be wound onto the storage drum if the head part facilitates filling of the thread supply device is rotated.
  • thread delivery device hereinafter referred to as thread delivery device for short, is generally designated by the reference number 10. It has a carrier 12 for a thread storage part 14 and a drive pulley arrangement 16, which are rotatably mounted on it together. An arrangement of thread guiding elements, generally provided with the reference number 18, is also fastened to the carrier 12, by means of which the thread running path is determined by the thread delivery device 10 and a thread monitor device, generally designated by the reference number 20, for determining thread breaks.
  • the carrier 12 consists of an arm 22, at the rear end of which a downwardly open recess 24 is provided for receiving a suitable support part 26, for example for receiving a support rail or a support ring as parts of a mounting device for the thread feed which is customary in circular knitting machines.
  • a threaded bore 28 opens into the recess 24 and serves to receive a grub screw 30 with which the arm 22 can be clamped to the support part 26.
  • the drive pulley assembly 16 is conventionally comprised of a pair of pulleys 32, each of which has a plurality of axially extending teeth 34 evenly spaced about its circumference, which engage a toothed belt 36 or toothed belt as a common drive means in circular knitting machines.
  • the two pulleys 32 are rotatably supported coaxially adjacent to one another by means of ball bearings 40 on a central shaft 38.
  • a clutch disc 42 is fastened between and coaxial with the pulleys 32 so that it can be adjusted in the axial direction between the two pulleys 32 in order to selectively come into frictional connection with one or the other pulley and thereby the relevant pulley 32 to rotate with the shaft 38.
  • the pulleys 32 have different diameters so that the shaft 38 can be operated at different speeds.
  • the shaft 38 protrudes on both sides beyond the two pulleys 32 and is rotatably supported with its lower end region in the arm 22 of the carrier 12 by means of a bearing 44 formed in the arm 22, which holds the shaft 38 in an upright position in which the pulley arrangement is 16 is located directly above the arm 22.
  • the thread storage part 14 has a pair of storage drums 46, one of which is fixedly connected to the projecting lower end of the shaft 38 and is arranged immediately below the arm 22, while the other is connected to the projecting upper end of the shaft 38 immediately above the upper pulley 32 is firmly connected.
  • the two storage drums 46 are arranged for a synchronous coaxial rotary movement with the active pulley 32, which is coupled to the drive shaft 38 via the clutch disc 42.
  • Each storage drum 46 has an outer surface 48 with an essentially concave course in axial section and forms a peripheral storage area on which a thread is wound and from which it is unwound can be.
  • each storage drum 46 causes the thread turns applied at the upper axial end to be pushed axially downward on the outer surface when the storage drum 46 rotates, so that a single layer of thread turns is maintained on each storage drum 46, as described in more detail below is explained.
  • the upper projecting end of the shaft 38 has an end pin projecting above the upper storage drum 46, on which a bearing 50 is rotatably arranged.
  • a cap 52 is frictionally connected to the bearing 50 so that it can rotate relative to the end journal and relative to the upper storage drum 46.
  • An arm 54 extends radially outward from the cap 52 and is provided with a thread guide eyelet 56 which is fastened in an opening in the central part of the arm 54.
  • an upwardly directed web 58 is fastened to the end thereof opposite the recess 24, which has an offset 60 in its central region, in which a thread guide eyelet 62 is also arranged.
  • the upper free end of the upward web 58 is provided with a slot opening 64 which can receive the free end of the radially directed arm 54 of the cap 52.
  • a pair of fingers 66 ending in hook sections 68 are attached to the arm 22 of the carrier 12 side by side, which protrude forward from the arm 22 and are located directly below the bent portion 60 of the arm 58 and the like Hook sections overlap and thereby form a guide slot 70 between the fingers 66.
  • the arm 22 of the carrier 12 is provided on its front vertical end face with a projection 72, which is provided with a guide rod 74 made of porcelain, polished metal or another smooth surface, which projects horizontally and laterally perpendicularly from the projection 72.
  • a projection 76 arranged on the underside of the arm 22 is located directly in front of the lower storage drum 46 and is provided with a thread guide eyelet 78 which is approximately at the height of the upper axial end of the lateral surface 48 of the lower storage drum 46.
  • a pair of U-shaped guide brackets 80 are also fastened, the guide brackets running parallel to one another immediately behind the lower storage drum 46.
  • Each of the thread guide eyelets 46, 62 and 78 is shown as a conventional ring eyelet, but other types of eyelets can be used, for example spiral eyelets or spiral eyelets, which facilitate thread insertion into the thread delivery device.
  • the thread monitor 20 has a first U-shaped switching arm 82, the ends of which are mounted on opposite longitudinal sides of the arm 22 in the vicinity of the upper side thereof, and which extends from there forward downward and a pivoting movement of its base part 82 'between an upper position, in which it is approximately on the connecting line between the guide rod 74 and the thread guide eyelet 78 and which is shown with solid lines, and a lower position which is below the height of the thread guide eyelet 78 and which is shown with dashed lines can.
  • a second U-shaped switching arm 84 is similarly mounted on opposite sides of the arm 22 of the carrier 12 immediately adjacent to the bearing point of the switching arm 82 and extends backwards downward.
  • the switching arm 84 can pivot its base part 84 'between an upper position, in which it is located directly between the lower ends of the two U-shaped guide brackets 80 and in which it is shown with solid lines, and a lower one, shown in broken lines Execute the position in which it is below the height of the ends of the guide bracket 80.
  • Each switching arm 82, 84 is electrically connected in a known manner in the area of its storage location to an alarm device which it actuates when it is in its lower position and which gives an optical light display, an acoustic display or another display.
  • the alarm device is in turn electrically connected to the associated textile machine in order to switch off the machine as soon as the alarm device is triggered either by the switching arm 82 or by the switching arm 84.
  • the front end of arm 22 is formed as a hollow plastic housing 86 with translucent or translucent walls and is internally provided with a light bulb of the alarm device which gives a visual indication when the alarm device is triggered.
  • the thread delivery device When operating the thread delivery device as a typical accessory for a textile machine, for example a circular knitting machine, the thread delivery device is arranged between a thread delivery point S, which is only indicated schematically in the drawing, and the knitting machine T or other textile machine, which is also only indicated schematically.
  • the yarn delivery device is aligned with the yarn guide eyelet 56 receiving the incoming yarn A to the yarn delivery point S and with its guide brackets 80 to the yarn section leading to the textile machine T.
  • a thread delivery point S and therefore a corresponding number of thread delivery devices 10 are provided for each knitting system.
  • the thread A is fed through the thread guide eyelet 56 and runs from there tangentially to the outer surface 48 of the upper storage drum 46 and forms several turns thereon.
  • the continuous operation of the textile machine T requires the continuous supply of thread A.
  • the toothed belt 36 which is driven synchronously by the textile machine T in the usual manner, is guided over the active belt pulley 32, which can optionally be activated by means of the clutch disc 42 .
  • the toothed belt 36 meshes with the teeth 34 of the selected active pulley 32 of each thread delivery device 10 used.
  • each thread delivery device 10 the active belt pulley 32 and the upper and lower storage drum 46 of each thread delivery device 10 are driven uniformly and synchronously with the textile machine T, as a result of which the thread A is moved in the longitudinal direction from the thread delivery point S to the textile machine T, wherein it is temporarily stored as a result of its winding on the upper and on the lower storage drum 46.
  • the running thread A passes through the thread guide eyelet 56, it is deflected and guided tangentially onto the lateral surface 48 of the upper storage drum 46 near the upper axial end of this storage drum 46.
  • the thread A is wound around the upper part of the outer surface 48 of the upper storage drum 46, the thread A being in because of the concave shape of the outer surface 48 and due to the tension A present Axial direction on the outer surface 48 is deflected towards the central and smaller diameter area of the thread storage drum and is wound up in individual turns.
  • the thread windings thus move axially downward on the lateral surface 48 of the upper storage drum 46 under the sliding effect produced by the deflection of the following length of the thread A.
  • the thread A after it has been drawn off from the lower part of the outer surface 48 of the upper drum 46 and passed through the thread guide eyelet 62, the guide slot 70, the guide rod 74 and the thread guide eyelet 78, is on the outer surface 48 of the lower storage drum 46 wound up and deflected axially downwards.
  • This type of winding deflection takes place continuously when the thread A is continuously fed and wound around each of the two drums 46 when the active pulley 32 and the storage drums 46 rotate together, thereby forming a single thread winding layer on each storage drum 46.
  • each U-shaped switching arm 82, 84 is pivoted upwards into its upper position, the base part 82 ', 84' of the switching arm 82, 84 resting on the running thread under the weight of the switching arm; the switching arm 82 between the guide rod 74 and the thread guide eyelet 78 and the switching arm 84 between the two guide brackets 80.
  • the two switching arms 82, 84 are pivoted upward from their lower switching position by the thread A under normal tension and allow in this position the operation of the textile machine T in a normal manner.
  • the associated alarm is and shutdown device triggered by the switching arm or the switching arms and thereby immediately switched off the textile machine T.
  • the switching arm 82 monitors the running thread A for thread break or another thread tension loss in the direction of travel in front of the lower storage drum 46, while the switching arm 84 monitors the thread A in the direction of travel behind or after the lower storage drum 46. If a break occurs in front of the thread delivery device, i.e.
  • the amount of thread stored on the upper storage drum 46 is first unwound and passed on to the lower storage drum 46 while the switching arm 82 sinks into its lower switching position under its weight and the alarm device is actuated and the textile machine T stops before the thread supply drum is also substantially processed by the lower thread storage drum 46. If a thread break occurs behind the thread delivery device, the switching arm 84 will practically immediately fall down into its switching position and switch off the textile machine T without the thread delivery device being significantly influenced.
  • an upper and a lower thread storage drum 46 are provided in the thread delivery device 10 for continuous storage of the continuous thread A and the switching arm 82 monitors the thread in the area between the two storage drums 46, the effect of voltage fluctuations, vibrations, flutter movements O . Like., Which occur on the thread A on its running path lying before or after the thread delivery device, eliminated.
  • the path of movement of the thread A from the upper storage drum 46 to the lower storage drum 46 is precisely controlled and determined by the thread guide members 62, 66, 74, 78, so that no similar fluctuations in tension, vibration or the like can occur on this running path of the thread A. , but there is no significant increase in the friction or tension acting on the thread A.
  • the switching arm 82 becomes the associated one Activate alarm and switch-off device practically only in the event of breaks in the thread A that actually occur and occur in front of the upper storage drum 46.
  • Incorrect shutdowns of the textile machine T which occur without the occurrence of a thread break, are practically completely excluded in the present thread delivery device.
  • the exact cause of the incorrect shutdowns has not been finally determined by known thread delivery devices, it is assumed that in known thread delivery devices, in which an upper storage drum is not provided, the constant effect of thread tension changes and vibrations continuously produces corresponding oscillatory movements of the switching arm of the upper thread monitor, which occasionally turn out to be so large that they actuate the shutdown device and switch off the machine T, although no thread breakage has occurred.
  • the rotatable cap 52 allows the thread A to be wound around the upper storage drum 46 and thereby facilitates the rewinding of the thread after a thread break occurred in front of the thread delivery device.
  • the yarn A is unwound from the upper storage drum 46 before the switching arm 82 can trigger the associated alarm and switch-off device.
  • the yarn A must be rewound onto the upper storage drum 46.
  • the front end of the broken thread A is first passed through the thread guide eye 56 and from there directly through the thread guide eye 62 in the web 58 and further through the guide slot 70, around the guide rod 74 and through the thread guide eye 78 and by splicing or Knotting connected to the broken off other end of the thread part still wound on the lower storage drum 46. Then the radial arm 54 of the cap 52 is moved out of the slot opening 64 of the web 68. The web 58 is sufficiently resilient so that it can be bent out to release the arm 54. Then the cap 52 and its radial arm 54 can be rotated together with respect to the shaft 38 and with respect to the upper thread storage drum 46.
  • the cap 52 is then manually rotated a sufficient number of revolutions around the shaft 38, whereby the thread A is drawn continuously from the thread supply point S through the thread guide eyelet 56 of the radial arm 54 and is wrapped around the upper storage drum 46 during the subsequent length of thread A is held essentially by the lower storage drum 46 and the thread guide elements 62, 66, 74 and 78 in front of it.
  • the protruding end of the radial arm 54 is re-anchored in the slot opening 64 of the upward web 58 and the thread delivery device is again ready for operation in the above described way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
EP86113492A 1985-10-04 1986-10-01 Fadenliefervorrichtung für Textilmaschinen Expired - Lifetime EP0217373B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US784626 1985-10-04
US06/784,626 US4687150A (en) 1985-10-04 1985-10-04 Strand storing and delivering device

Publications (3)

Publication Number Publication Date
EP0217373A2 EP0217373A2 (de) 1987-04-08
EP0217373A3 EP0217373A3 (en) 1988-01-07
EP0217373B1 true EP0217373B1 (de) 1990-05-02

Family

ID=25133046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113492A Expired - Lifetime EP0217373B1 (de) 1985-10-04 1986-10-01 Fadenliefervorrichtung für Textilmaschinen

Country Status (6)

Country Link
US (1) US4687150A (ja)
EP (1) EP0217373B1 (ja)
JP (1) JPS6296263A (ja)
DD (1) DD253988A5 (ja)
DE (1) DE3670821D1 (ja)
ES (1) ES2014216B3 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6089491A (en) * 1997-08-01 2000-07-18 Sipra Patententwicklungs - U. Beteiligungsgesellschaft Mbh Yarn delivery device and drive wheel suitable for this purpose

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4105981C2 (de) * 1991-02-26 1999-08-19 Sipra Patent Beteiligung Fadenliefervorrichtung
DE19546404A1 (de) * 1995-12-12 1997-06-19 Terrot Strickmaschinen Gmbh Fadenliefervorrichtung
DE19840727A1 (de) * 1998-09-07 2000-05-25 Memminger Iro Gmbh Fadenliefergerät für Textilmaschinen
CN108251953B (zh) * 2018-01-29 2019-06-18 东莞今富五金机械有限公司 快速更换送纱轮的变色送纱器

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE214112C (ja) *
GB1262179A (en) * 1968-10-14 1972-02-02 Rosen Karl I J Thread storage and delivery device for textile machines
JPS5244661Y2 (ja) * 1973-01-12 1977-10-11
DD105181A1 (ja) * 1973-06-06 1974-04-12
DE2608590C3 (de) * 1976-03-02 1980-08-28 Memminger Gmbh, 7290 Freudenstadt Fadenliefervorrichtung
DE2642183C2 (de) * 1976-09-20 1984-12-06 Memminger Gmbh, 7290 Freudenstadt Fadenliefervorrichtung, insbesondere für Strickmaschinen
FR2383111A1 (fr) * 1977-03-10 1978-10-06 Paepke Horst Dispositif fournisseur de fil
DE2821725C2 (de) * 1978-05-18 1980-05-08 Ab Iro, Ulricehamn (Schweden) Fadenspeicher- und -liefervorrichtung
US4271686A (en) * 1978-08-01 1981-06-09 Memminger Gmbh Thread or yarn supply apparatus with movable thread supply guide means, particularly for circular knitting machines
EP0084032B1 (en) * 1981-07-14 1988-09-21 Sulzer Brothers Limited Weft yarn metering device
DD214113A1 (de) * 1983-03-18 1984-10-03 Textima Veb K Fadenliefervorrichtung fuer insbesondere hochleistungsgrossrundstrickmaschinen
DD214112A1 (de) * 1983-03-18 1984-10-03 Textima Veb K Fadenliefervorrichtung fuer hochleistungsgrossrundstrickmaschinen
DE3326099C2 (de) * 1983-07-20 1985-05-23 Memminger Gmbh, 7290 Freudenstadt Fadenliefervorrichtung für Textilmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6089491A (en) * 1997-08-01 2000-07-18 Sipra Patententwicklungs - U. Beteiligungsgesellschaft Mbh Yarn delivery device and drive wheel suitable for this purpose

Also Published As

Publication number Publication date
JPH0157027B2 (ja) 1989-12-04
ES2014216B3 (es) 1990-07-01
JPS6296263A (ja) 1987-05-02
EP0217373A3 (en) 1988-01-07
DE3670821D1 (de) 1990-06-07
US4687150A (en) 1987-08-18
DD253988A5 (de) 1988-02-10
EP0217373A2 (de) 1987-04-08

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