US3587961A - Yarn delivery mechanism - Google Patents

Yarn delivery mechanism Download PDF

Info

Publication number
US3587961A
US3587961A US745017A US3587961DA US3587961A US 3587961 A US3587961 A US 3587961A US 745017 A US745017 A US 745017A US 3587961D A US3587961D A US 3587961DA US 3587961 A US3587961 A US 3587961A
Authority
US
United States
Prior art keywords
delivery
roller
yarn
driving roller
contact
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
US745017A
Other languages
English (en)
Inventor
Helmut Ritter
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.)
Heberlein Patent Corp
Original Assignee
Heberlein Patent Corp
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 Heberlein Patent Corp filed Critical Heberlein Patent Corp
Application granted granted Critical
Publication of US3587961A publication Critical patent/US3587961A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B65H51/02—Rotary devices, e.g. with helical forwarding surfaces
    • B65H51/04—Rollers, pulleys, capstans, or intermeshing rotary elements
    • B65H51/08—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements
    • B65H51/10—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements with opposed coacting surfaces, e.g. providing nips
    • 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

  • This invention relates to apparatus useful in the feed or delivery of lengths of yarn from one location to another, and more particularly with the delivery of individual or ply-twisted yarns or threads such as false twist yarns longitudinally into textile machines operating at high speeds.
  • the delivery and drive means are brought back into surface contact while the drive means continues to rotate at its normal speed.
  • the yarns, positioned between the drive and delivery rollers, are thus exposed to sudden high frictional forces which may cause breakage or structural changes to occur.
  • the machine maybe threaded by winding the yarn around a takeup bobbin which is driven by hand or mechanically, whereupon the bobbin pulls the yarn through the machine until the delivery system is reactivated.
  • Such hand operation is not feasible in modern machines having delivery speeds of up to 500 m/min. and more, since although the yarns are drawn through the machine by means ofa winding bobbin, the friction forces to which the yarns are subjected between the drive and delivery rollers when the same are pressed into contact are too high and often cause deformation and breakage.
  • my invention comprises apparatus for the delivery of yarns and the like in textile machines comprising, a rotatable driving roller, a delivery roller mounted for idling rotation, the rollers having opposed interacting delivery surfaces, means for rocking the delivery roller to bring the interacting surfaces into and out of contact, means interacting with the delivery roller as the latter is shifted towardsthe driving roller to bring the surface of the delivery roller to substantially the speed of rotation of the surface of the driving roller as contact between the surfaces is effected.
  • the last-men tioned means may preferably take the form ofan annular projection extending radially outwardly of an edge of the driving roller and formed with a surface arranged to engage an edge of the delivery roller as the surface of the delivery roller moves towards that of the driving roller.
  • each delivery roller axle is utilized to provide the axial force urging the edge of that roller towards the annular projection on its interacting driving roller.
  • the delivery roller gradually assumes the speed of the driving roller due to the preliminary contact with the projection, which contact is assured by the spring arrangement urging the delivery roller axially towards the projection.
  • the projection is preferably located at one edge of the particular driving roller and is formed with a flank inclined towards that roller.
  • I provide means for urging the delivery roller axially towards the projection.
  • each driving roller may be fixedly mounted on a single-drive shaft for rotation therewith, each of the delivery rollers is individually mounted so that a yarn may be threaded without interrupting the delivery of yarn for treatment at other stations of the machine.
  • a further aspect of the invention resides in the provision of a hub concentric with the delivery roller but eccentric about its axis and upon which the delivery roller is mounted for idling rotation.
  • the hub is mounted on the delivery roller axle and this arrangement permits the delivery roller readily to be brought into and out of contact with the driving roller merely by rotation of the hub.
  • a manually engageable radially extending arm is fixed to the hub to rock same to the position desired, and a stop in the form of a pin may be provided on the axle to limit movement of the hub in either direction of rotation when the delivery roller and the driving roller are brought into or out of contact.
  • the pressure spring necessary for exerting the contact pressure can be changed.
  • the sole purpose of this spring is to preset the mechanism at the required contact pressure, it exerts only the force corresponding to its size and is inactive when the machine is in operation. ln addition, it is desirable to incorporate in the delivery mechanism a safety device which enables the delivery roller to be lifted from the driving roller when interruptions in operation occur.
  • I provide a mounting construction for the delivery roller whereby it can not only be swiveled as described, but is pressed against the driving roller with a specific force when the two are in contact.
  • This force is determined by a pressure spring fitted in the mounting during installation of the delivery mechanism on any suitable machine, but is then locked by screws with the result that the spring is made inactive but the contact pressure is maintained.
  • the delivery roller which is fitted with a resilient cover, is pressed against the driving roller at the originally set contact pressure.
  • the mounting also incorporates means for raising the delivery roller from the driving roller only when a specific pressure limit is exceeded. The pressure limit can, if required, be altered by exchanging the spring which exerts this pressure and which is also fitted in the housing.
  • This pressure limit should be at such a level that the delivery roller is not raised from the driving roller as a result of the passage of normal yarn slubs or slubs caused by two knotted yarn ends, as this would be contradictory to the very purpose of the invention.
  • the sudden increase in yarn volume is absorbed by the resilient cover of the delivery roller.
  • the pressure limit is exceeded and the delivery roller raised from the driving roller when, e.g., as a result of a thread break, the yarn becomes entangled round one of these rollers.
  • FIG. I is a side elevational view of apparatus in accordance with my invention.
  • FIG. 2 is a front elevational view, partly in section, of the apparatus of FIG. 1;
  • FIG. 3 is a top plan view of the apparatus of FIGS. 1 and 2;
  • FIG. 4 is a cross-sectional view taken along the lines 44 of FIG. 3.
  • FIGS. 1, 2 and 3 there is shown a support beam extending parallel to a shaft 11 which rotates continuously during operation of the machine and on which are mounted several driving rollers 12 for rotation therewith. These driving rollers are spaced along the shaft 11 at the several delivery stations, but as they are identical in configuration only one such roller is shown.
  • the roller 12 may be conveniently fixed on the shaft 11 by means of a half worm gear 14 and taperlock mounting 15 secured in place by screws 16.
  • a chrome plated steel ring 17 is press fit on the peripheral surface 19 of the roller.
  • the driving roller 12 is formed with a radially outwardly extending protrusion or flange 20 at one edge thereof, the inner face (FIG. 2) of which tapers in a gentle arc downwardly towards the surface of the roller for a purpose to be later described.
  • a mounting bracket 21 is secured to the beam 10 by means of screws 22, and that the bracket is formed with a generally cylindrical housing 24.
  • a shaft 25 about which more will later be said extends out of the upper part of the housing 24 and is rigidly connected to an L-shaped support 26 by means of a washer 27 and nut 29.
  • a pin 30 extends downwardly from the end ofa leg 26' of the support 26 and passes between two fingers 31 (FIGS. 2 and 4) extending outwardly of the upper end of the housing 24.
  • Another leg 26" of the support 26 is formed with a bore 32 (FIG. 2) into which is press fit an extension 34 of a shaft 35 axially parallel to the shaft 11.
  • the shaft 35 supports an eccentrically formed hub 36 which is rotatable and axially shiftable relatively to the shaft and to which is secured a manually engageable arm or lever 37.
  • the hub 36 is fonned with a downwardly facing sector-shaped groove 39 which serves as a limit stop by reason ofits relationship to a pin 40 fixed to the shaft 35 and extending into the groove.
  • a ball bearing 41 is fixedly mounted on a portion of the hub 36 of reduced diameter and is secured in place by a shoulder formed on the hub by the reduction and by an external circlip 42 and a pair of cup springs 44, acting against each other as shown in FIG. 2.
  • the ball bearing 41 supports a delivery roller 45 for rotation about the shaft 35.
  • the roller 45 may be formed of a metal ring 46 covered by a ring 47 of suitable resilient plastic.
  • a cup 49 is mounted by means of a fixing screw 50 passing through the center of the cup and threaded into the end of the shaft 35.
  • a spring 51 bears against the interior of the cup 49 and against a cup 70 which in turn bears against one end of the hub 36 so that the latter and with it the delivery roller 45, are urged axially along the shaft 35 to the left under spring force.
  • the lever 37 When it is desired to return the delivery roller into contact with the driving roller, the lever 37 is shifted in the appropriate direction so that the eccentricity of the hub 35 causes the surface of roller 45 to advance towards that of roller 12.
  • the pin 40 rocking in the segmental groove 39 serves a limit control.
  • the housing 24 receives the shaft 25, the lower end of which is provided with a nut 52 and washer 54 which abuts a disc 55 moveable longitudinally in the hous- Within the housing 24, a spring block 56 is formed with an axial bore 57 and an opposed wider bore 59 forming a wall 60 therebetween which is centrally apertured for passage therethrough of the shaft 25.
  • the shaft 25 is stepped to form an annular shoulder 61 which bears against the wall 60.
  • An end plate 62 is fixed in the top end of the housing 24 by means of an internal circlip 64 and a protection cap 65 is removably positioned in the other end of the housing.
  • a spring 66 extends between the end plate 62 and the wall 60 to urge the block 56 towards the bottom of the housing 24.
  • the block 56 is concentric with the axis of the housing 24 and a pair of setscrews 67 enables the block 56 to be locked against movement when it is located in the desired longitudinal position in the housing 24, which is the case when the delivery roller is in contact with the driving roller.
  • the spring 66 exerts the pressure required for the delivery roller.
  • This pressure is locked by means of screws 67.
  • the whole operation is made possible by the fact that a spring 69, which serves to fix a safety pressure limit, bears against the disc 55 and the bottom of the wall 60 with a force several times as great as that of the spring 66.
  • the compressive force of spring 69, the shaft 25, together with the nut 52, the washer 54, the disc 55, the block 56 and the spring 69 are to be regarded as a compact unit.
  • the shaft 25 carries the support 26, and this in turn the shaft 35 and the delivery roller 45, so that, if the delivery roller is separated from the driving roller by an abnormal force, i.e., the compressive force (safety pressure limit) of spring 69 is exceeded, the shaft 25, together with the nut 52, the washer 54 and the disc 55, shifts upwards, compressing the spring 69 tightly together.
  • the pin 30 already referred to as passing between the fingers 31 formed on the housing 24 prevents rotation of the support 26, and therefore the shaft 35 and the delivery roller 45, from becoming misaligned relatively to the driving roller 12.
  • my construction allows the delivery roller to move away from the driving roller in the event that the safety pressure afforded by spring 69 in the housing 24 is exceeded by serious irregularities in the yarn delivery such as by the formation of a pad of thread on one of the rollers, for example.
  • apparatus for delivering yarns and the like in textile machines a rotatable driving roller, a delivery roller mounted for idling rotation, the rollers having opposed interacting delivery surfaces, means for rocking said delivery roller to bring said interacting surfaces into and out of contact, means interacting with said delivery roller as the latter is shifted towards said driving roller to bring the surface of said delivery roller to substantially the speed of rotation of the surface of said driving roller as contact between said surfaces is effected said last mentioned means comprising an annular projection extending radially outwardly of an edge of said driving roller and formed with a surface arranged to engage an edge of said delivery roller as the surface of said delivery roller moves towards that of said driving roller.
  • Apparatus according to claim 2 wherein said last-mentioned means comprises a spring pressing said delivery roller against said driving roller and locking means effective to maintain said spring force constant.
  • apparatus for delivering yarns and the like in textile machines according to claim 1 and further including means for rocking said delivery roller to bring said interacting surfaces into and out of contact, pressure setting means effective when said surfacesare in contact to maintain a constant contact pressure therebetween and safety pressure control means including a spring permitting movement ofsaid delivery roller in a direction away from said driving roller when serious irregularities in yarn delivery occur.
  • apparatus for delivering yarns and the like in textile machines a rotatable drive shaft, a driving roller mounted for rotation with said drive shaft, a delivery roller mounted for idling rotation, said rollers having .opposed interacting delivery surfaces, means for rocking said delivery roller to bring said interacting surfaces into and out of contact, said driving roller having an annular projection adjacent its interacting surface, and means urging said delivery roller axially to cause its edge to engage a surface of said projection prior to effecting contact of said delivery surfaces when said delivery roller is moved towards said driving roller thus to bring the interacting surface of said delivery roller to substantially the speed of rotation of said driving roller before the interacting surface of said contact between said delivery surfaces is effected.
  • said means for rocking said delivery roller includes an eccentrically shaped hub bored concentrically with the delivery roller and a manually engageable arm extending from said hub by which said hub may be rotated to bring the said rollers into and out of contact.
US745017A 1967-08-28 1968-07-15 Yarn delivery mechanism Expired - Lifetime US3587961A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1204267A CH473048A (de) 1967-08-28 1967-08-28 Lieferwerk zur Förderung von Fäden, Garnen oder Zwirnen in Textilmaschinen

Publications (1)

Publication Number Publication Date
US3587961A true US3587961A (en) 1971-06-28

Family

ID=4379299

Family Applications (1)

Application Number Title Priority Date Filing Date
US745017A Expired - Lifetime US3587961A (en) 1967-08-28 1968-07-15 Yarn delivery mechanism

Country Status (7)

Country Link
US (1) US3587961A (de)
BE (1) BE720008A (de)
CH (1) CH473048A (de)
CS (1) CS158224B2 (de)
FR (1) FR1579205A (de)
GB (1) GB1242904A (de)
NL (1) NL6812233A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824831A (en) * 1972-06-07 1974-07-23 Morgaardshammar Ab Guide roller in roller guides
US4000762A (en) * 1974-05-15 1977-01-04 Nissan Motor Co., Ltd. Yarn drawing and measuring device of a weaving loom
US4483516A (en) * 1981-05-12 1984-11-20 Cyklop International Emil Hoffmann, Kg Band-tensioning device
US4840300A (en) * 1986-03-18 1989-06-20 Sharp Kabushiki Kaisha Paper conveying roller for image forming apparatus
US6336608B1 (en) 2000-02-29 2002-01-08 James Robert Cope Flexible web roller guide assembly with an integral centrifugal pump capability to provide a hydrostatic air bearing function to the roller guides outside supporting surface

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824831A (en) * 1972-06-07 1974-07-23 Morgaardshammar Ab Guide roller in roller guides
US4000762A (en) * 1974-05-15 1977-01-04 Nissan Motor Co., Ltd. Yarn drawing and measuring device of a weaving loom
US4483516A (en) * 1981-05-12 1984-11-20 Cyklop International Emil Hoffmann, Kg Band-tensioning device
US4840300A (en) * 1986-03-18 1989-06-20 Sharp Kabushiki Kaisha Paper conveying roller for image forming apparatus
US6336608B1 (en) 2000-02-29 2002-01-08 James Robert Cope Flexible web roller guide assembly with an integral centrifugal pump capability to provide a hydrostatic air bearing function to the roller guides outside supporting surface

Also Published As

Publication number Publication date
BE720008A (de) 1969-02-27
FR1579205A (de) 1969-08-22
DE1785186B2 (de) 1975-11-20
GB1242904A (en) 1971-08-18
DE1785186A1 (de) 1972-01-05
NL6812233A (de) 1969-03-04
CH473048A (de) 1969-05-31
CS158224B2 (de) 1974-10-15

Similar Documents

Publication Publication Date Title
US2855750A (en) Thread twisting device
US4004438A (en) Thread feed device for a hosiery knitting machine
US3587961A (en) Yarn delivery mechanism
US2557104A (en) Hollow spinning or twisting member
US3350021A (en) Thread winding machine
US3831873A (en) Take-up system
US3949573A (en) Thread delivery device for textile machines
US3209558A (en) Yarn furnishing device
US3153893A (en) Method and apparatus for twisting and plying strands
US4047398A (en) Yarn guide finger for positive yarn supply apparatus
US3940089A (en) Sewing machine thread control
US4399952A (en) Thread delivery apparatus
US3772869A (en) Twist stopping device
US2267899A (en) Cop frame
US2432696A (en) Tension device for winding machines
US3029039A (en) Apparatus for coiling wire
US3741491A (en) Apparatus for winding yarn
US3408893A (en) Braider carrier
US3077966A (en) Press control device
US3385044A (en) Textile strand-spinning apparatus
US3858830A (en) Positive yarn feeding device
US3295788A (en) Tensioning apparatus
US3499277A (en) Apparatus for twisting and plying strands
JP3968859B2 (ja) 巻取機のリボン巻防止装置
US2924064A (en) hedtmann etal