CA1117507A - Strand winding device and support cap for yarn tube carriers - Google Patents
Strand winding device and support cap for yarn tube carriersInfo
- Publication number
- CA1117507A CA1117507A CA000329762A CA329762A CA1117507A CA 1117507 A CA1117507 A CA 1117507A CA 000329762 A CA000329762 A CA 000329762A CA 329762 A CA329762 A CA 329762A CA 1117507 A CA1117507 A CA 1117507A
- Authority
- CA
- Canada
- Prior art keywords
- cap
- yarn
- ring
- tube
- projection
- 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
Links
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
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
- B65H54/40—Arrangements for rotating packages
- B65H54/54—Arrangements for supporting cores or formers at winding stations; Securing cores or formers to driving members
- B65H54/553—Both-ends supporting arrangements
-
- 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
Landscapes
- Storage Of Web-Like Or Filamentary Materials (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An improved yarn strand winding device and support cap adapter therefor comprising an end cap having an axial projection for insertion into the ends of a tubular yarn support carrier. Mounted on the projection of the end cap is a resilient, radially expandable ring having internal surface portions matingly received about the projection with radial protrusions on the projections residing in corresponding recesses in the ring. Upon initial rotation of a yarn support tube by peripheral engagement with a driving roller, the tube and rings of the end cap adapters move slightly relative to the main body of the cap to move the cap projections into engagement with surface portions of the ring and expand the ring against interior walls of the tube, thus ensuring positive grip of the tube to prevent improper transfer tail formation and provide proper yarn package build during yarn collection.
An improved yarn strand winding device and support cap adapter therefor comprising an end cap having an axial projection for insertion into the ends of a tubular yarn support carrier. Mounted on the projection of the end cap is a resilient, radially expandable ring having internal surface portions matingly received about the projection with radial protrusions on the projections residing in corresponding recesses in the ring. Upon initial rotation of a yarn support tube by peripheral engagement with a driving roller, the tube and rings of the end cap adapters move slightly relative to the main body of the cap to move the cap projections into engagement with surface portions of the ring and expand the ring against interior walls of the tube, thus ensuring positive grip of the tube to prevent improper transfer tail formation and provide proper yarn package build during yarn collection.
Description
~75C~ 7 This invention relates to an irnproved strand winding device and .support cap, or adapter, for rotatably supporting the ends of a -tubular carrier during collection of strand material in package form thereon, and, more particularly, to an improved end cap for supporting a textile yarn collection tube which is rotatably driven during yarn collection and yarn package build-up by peripheral surface engagement with a driving roller.
In high speed winding devices for collecting strand matèrial, such as textile yarns, in package form, it is a com-mon practice to collect the yarns after processing on a peri-pherally driven tubular carrier. Typically, yarns subjected to a texturizing or other heat treating operation, such as on a false twist machine, are collected on paper or plastic tubes, with each tube being engaged by and supported at its ends for rotation on end caps, or adapters, which are in turn mounted for free rotation on spaced support arms. After supporta~ly positioning the tu~e on the end caps, the tube is placed in rotation by bringing it into peripheral engagement with a driv-ing roller which frictionally contacts the outer surface of the tube and yarn being collected thereon to rotate the package.
It is further a practice in forming such yarn pack-ages to provide an initial small amount of yarn adjacent one end of the tube outside the main portion of the yarn package formed on the tube. This small amount of yarn, re~erred to as a yarn "transfer tail", is utilized subsequently to connect the yarn strand in one package to a yarn strand in another yarn package for continuous yarn supply in further yarn handl-ing operations.
In collection of yarns on textile yarn processing machines having a continuous yarn feed, it is the practice, when doffing a yarn package at a collection position, to tem-..,.,`P ~
75~
porarily direct the oncoming yarn to "waste" until a full yarn packa~e is removed and a new support tube is inserted at the co~lection position. Such i5 generally accomplished by use of a suction device located adjacent the yarn collection position into which the moving yarn strand passes during doffing. Upon completion of doffing and insertion of a new yarn support tube at the collection position, the tube is brought into engagement with the driving roller to rotate the tube. The moving yarn strand being fed to waste is then guided by the machine opera-tor into a yarn holding guide adjacent one end of the tubeand then is passed into a cutting device mounted on the adja-cent end cap supporting the tube. This operation cuts the yarn from the waste portion of yarn and starts a yarn transfer tail build-up on the end of the tubular carrier~ After suffi-cient build-up of the transfer tail, the yarn is then removed from the holding guide into the yarn traverse guide machanism adjacent the surface of the carrier which moves in a programmed manner across the yarn carrier to build the yarn package.
In prior art devices of the type above described, difficulties have been encountered in transfer tail formation due to undesirable relative movement between the driven yarn support tube and the end caps, or adapters, which hold the -tube for rotational movement. Because of slight variations in diameters of the support tubes, the rotatably driven tubes often move relative to the supporting end caps during rotation, causing yarn in the transfer tails to become entangled or dis-lodged from the support tube during the yarn cutting operation.
Relative movement between the end caps and tube precludes in-stantaneous cutting and pulls the yarn strand onto or off of the tube, resulting in improper transfer tail formation and lost time for clearing the entangled yarn from the winding devlce .
; 2-'7~i~7 In addition, wi-t~l yarn support tubes of varying in ternal diameters, the tubes often becorne misaligned or wobble on the support caps during the winding operation, Lesulting in impropex package build-up on the tube and poor packaye formation.
It has been known to provide adapters for attac~ent to a rotatably driven spindle for securely positively engaging internal portions of a yarn carrier rotatably driven thereby.
My prior U, S. Patent 3,695,561 describes one such device.
However, it has not been known to provide adjustable end caps for positive engagement of yarn tube carriers in winding de-vices of the surface-driven package type described above, or to accomplish the ends and improvements obtained by the present invention described herein.
It is therefore an object of the present invention to provide an improved yarn package winding device and support cap, or adapter, for engaging and supporting ends of a surface-driven yarn support tube to preclude relative motion between the end cap and the surface driven tube mounted for rotation thereon.
It is a more specific object to provide an improved end cap adaptor for a tubular carrier which ensures efficient yarn transfer tail formation and positive rotational support of yarn tube carriers having varying internal dimensions.
In accordance with one aspect of the present invention, there is provide an improved end cap adapter for supporting an end of a peripherally driven, tubular yarn carrier during ro-tation thereof, comprising: a~ a support cap having a central rotational axis and a radially extending ed~e portion; b) cen-tral, axially extending projection means on one face of saidsupport cap, said projection means having a plurality of radial protrusions spaced about the central axis of said cap, 75~)7 c) means on said cap for mountin~ the cap on a support rnemb~r for free rotation about its central rotational axis, and d) a resilient, radially expandab]e ring mounted on said cen-tral projection means of said cap, said ring having an outer peripheral surface with means thereon for frictionally engag-ing the inner wall surface of a tube carrier received there-over, and an inner surface having a configuration to be loose-ly received about said cap projection means with said radial protrusions of the cap projection means being matingly received in correspondingly spaced recessed portions in the inner sur~
face of the ring, whereby rotation of a tube carrier received on said ring causes slight relative rotational movement of said ring about said projection means to move said protrusions out of said recesses to expand the diameter of the ring against the inner wall of the tube carrier.
In accordance with a further aspect of the present invention, there is provided in a yarn strand collection and package forming device including a driving roller, support means including a pair of spaced support arms having a pair of opposed, freely rotatable end cap adapters for supportably engaging end portions of a yarn support tube for rotation there-with, means for moving said support arms and end cap adapters to position a yarn support tube supported thereby in engagement with the driving roller to impart rotation to the tube during yarn collecting operations, and guide means for directing a yarn strand onto the surface of a rotating support tube posi~
tioned between said end caps for formation of a yarn transfer tail and for build-up of a yarn package thereon, the improve-ment therein wherein each of said end cap adapters comprises:
a) a support cap having a central rotational axis and a radial-ly extending edge portion, b3 means attaching said cap to a support arm of the package forming device for free rotation t - 4~
~75~J~
about its central rotatlonal axis, c) a ce~tral, axially ex-tending projection on one face of said suppor-t cap and extend-ing towards said opposed end cap adapter, said projection having a peripheral sur~ace with a plurality o~ radial pro-trusions spaced thereabout, and d) a resilient split ring mounted on said central projection of said cap, said ring hav-ing an outer peripheral surface with means thereon for ~ric-tionally engaging the inner wall surface o~ a tubular carrier received thereover, and an inner surface of said ring having a configuration to be loosely received about said cap projection in mating relation thereto, and with spaced recessed portions in the inner surface of the ring receiving said peripheral pro-trusions of the cap projection whereby rotation of a tubular carrier supportably received on said ring causes slight ini-tial relative rotational movement of said ring relative to said cap projection to expand the diameter of the split ring against the inner wall of the tube carrier and ensure nonre-lative movement of the carrier and end cap during yarn pack-age formation on the yarn carrier~
The above, as well as other objects of the present invention will become more apparent, and the invention will be better understood from the following detailed description of a preferred embodiment ol the invention, when taken together with the accompanying drawings, in which:
Figure 1 is a schematic f.ront view of a textile yarn collection device of a textile yarn processing machine, wherein the yarn package is rotated during collection by peripheral engagement with a driving roller;
Figure 2 is an enlarged side cross-sectional eleva-tion view of an end cap adapter of the present invention which is employed to grippingly engage the inner end portions of a tubular yarn carrier on the collection device seen in Figure l;
~ ,. --5 ~" "., Figure 3 is a cro~s-sectional view of the end cap adapter of the present invention, taken generally along line III-III of Figure 2;
Figure 4 is a cross-sectional view of the end cap adapter as seen in Figure 3, but showing the split ring of the adapter in the position it assumes during rotation of a tubular carrier supported thereon, and Figure 5 is an exploded perspective view of the end cap adapter of Figures 2-4, showiny the support elements for attaching the adapter for free rotation on the support arm of the winding device shown in Figure 1.
Referring more specifically to the drawings, Figure 1 illustrates a yarn package collection device 10 of a textile yarn processing machine, not shown. As is well known in the art, a yarn strand 12, after suitable processing, is continu-ously directed by yarn traverse guide means 14 onto the sur-face of a yarn tube carrier 16 and w~und package 17 (shown in dashed lines) which is supported at each end for rotation about its longitudinal central axis on end cap adapters 18, 20.
Each of the end cap adapters are, in turn, mounted for free rotation about its central axis on spaced support arms 22, 24 by suitable shaft and bearing means more particularly shown in Figure 5.
Support arms 22, 24 are pivotally attached to a sup-port frame member 30 to permit the yarn carrier tube 16 and any yarn collected thereon to be pivoted into and out of peripheral engagement with a driving roller 32, as is well known in the art. Positioned adjacent the surface of the carrier tube 16 when the tube is in driven engagement with the roller is the conventional yarn traverse rnechanism 14, and yarn transfer tail guide 36. Also located adjacent the yarn collection de-vice of the textile processing machine is a pneumatic suctlon 7~7 device or tu~e 3~, which r~ceives the oncorn:ing yarn ~trand for collection as waste during the yarn package doffing operation, as is known in the art.
In conventional yarn package doffing operations on a yarn processing machine having continuous yarn strand feed to the yarn collection point, upon completion of package for-mation on the support tube, the yarn package is pivoted by support arms 22, 24 out of driving engagement with the driving roller 32, and the oncoming yarn strand is separated from the package yarn and directed to the waste collection suction device 36. The yarn package is then removed from the end caps 18, 20 by sideways pivotal movement of one of the su~port arms 22 to disengage the ends of the tube from each of the end cap adapters.
~ n empty support tube is then placed into engagement with the end cap adapters and the tube pivoted into rotational engagement with the driving roller 32. The moving yarn strand passing to waste is then placed manually into the transfer tail guide 36 adjacent one end of the yarn tube and pulled by the operator across the peripheral surface of the adjacent end cap 20. As seen in Figures 2-5, the periphery of the end cap 20 is provided with a plurality of inverted V-shaped notches 39 having sharp inner surfaces which serve to grip and sever the oncoming yarn strand from the waste portion, as the on-coming strand is guided by guide 36 to form a plurality of yarn wraps 37 about the adjacent end of the yarn carrier tube 16. After a sufficient length of transfer tail has been placed on the end of the tube, the yarn is removed from the transfer tail guide 36 and the yarn traverse guide 34 there-after directs the yarn in programmed manner across the tube tobuild the yarn package 17 thereon.
As heretofore mentioned, i-t is co~lmon in the art ., . .~
~ 7-that yarn support tubes of the type described have s~iyht variances in their internal diameters as a result of manufac-turing tolerances, wear, handllng or the like. It is thus ~requently the case that the end cap projections on which the ends of the tube are received do not precisely fit the inter-nal diameters of the tubes to be placed thereon, causing im-proper alignment of the tubes on the supporting end caps, as well as slippage and relative rotational movement between the end caps and the tube during rotation of the tube by the driving roller. In such cases, improper yarn package formation occurs during the winding operation. In particular, when the oncoming yarn strand 17 is cut from the waste portion during formation of the transfer tail on the tube, engagement of the yarn with the cutting device on the end cap periphery causes the end cap to slip relative to the rotating tube and not properly cut the yarn when the tube is loosely received on the end cap. As can be appreciated, when the yarn is not quickly or properly cut, the attempted cutting operation can either dislocate the transfer tail 37 from its proper position on the tube or pull waste yarn into the winding device to en-tangle the same.
By means of the improved end cap adapter construction illustrated more particularly in Figures 2-5, projections on the end caps which engage the internal diameter of the tubes are self-adjusting in diameter during rotation of the yarn support tube to ensure positive grip of the tube and non-rela-tive movement of the end caps and support tube during initial transfer tail formation as well as throughout the yarn package winding operation. As seen in Figures 2-~, which are enlarged cross-sectional views of the end cap adapter 20 shown in ex-ploded view in Figure 5, each of the end caps of the present invention is of generally identical construction and comprises a generally circular main body portion 40 haviny a central rota-tional axis and a rad:ially extendin~ edge portion 42.
Spaced equally a~o~lt the edge portion of the cap are a plura-lity of inverted V-shaped notches 39 having sharp beveled edges which serve as a gripping and cutting surface for a yarn strand pulled into engagement with the periphery of the rotat-ing cap during a transfer tail forming operation.
Axia~ly extending from one face of the cap is a central projection 44 having a peripheral surface extending generally parallel to the central rotational axis of the cap.
As best seen in Figure 3 and 4, the peripheral surface of the cap projection has a plurality of generally straight flat sur-faces 48 spaced about the periphery by intervening protrusions 50 which have a generally arcuately curved surface. Spaced axially outwardly from the protrusions and extending about the periphery of the projection 44 is a circular groove 52 (Figure 2).
llhe opposite face of the end cap (Figure 2) is pro-vided with a central recess having a plurality of spaced resi-lient fingers 54 disposed therein in circular array. Friction-ally received and retained within the fingers is a ring ball bearing 56 (Figure 5) which surrounds a bushing 58. Shaft mounting means, shown as a threaded bolt 60, washer 60a, spacer 60b, and nut 61, extends through the central opening of the cap 20, ring bearing 56, bushing 58, and a thread guard cup 61a to secure the end cap to the support arm of the winding device. In this manner, the end cap is supported on the support arm for free rotation about its central axis during rotation of the yarn tube by the driving roller of the winding device.
As seen in Figures 2-5, surrounding the central pro-jection 44 on the end cap is a resilient, radially expandable ~ ~, g_ ` ~3 ~7~)~
ring, shown as a spli~ ring 62 having an external peripheral surface containing a plurality of raised ribs 64. I~e inner surface of the split ring is configured with a plurality of spaced flat surfaces 65 wi~h intervening recessed portions 66 so as to be matingly received around the projection, with the peripheral protrusions 50 of the projection residing in the corresponding recesses 66 of the split ring (Figure 3). The split ring is secured loosely on the projection 44 by means of a radiaily inwardly extending circular flange, or lip 68 (Figure 2) which resides in circular groove 52 on the cap projection so as to resist displacement of the ring from the projection 40 in an axial direction with respect to the rotat-ional axis of the cap 20.
- As seen in Figure 3, when the end cap adapters are not in rotation, the split ring is loosely secured on the cap projection with the radial protrusions of the projection re-siding in the correspondingly shaped recesses on the inner surface of the ring. When the cap projection and split ring supported thereon are inserted into the end of the tubular yarn carrier, and the yarn carrier placed in rotation by en-gagement with the driving roller, the split ring 62 is caused to rotate slightly relative to the end cap projection 40 to move protrusions 50 on the end cap projection out of recesses 66 and into frictional engagement with the flat surface por-tions 65 of the inner surface of the ring, as seen in Figure 4, thereby expanding the ring against the internal surface of tube 16 to securely and positively grip the same~ Thus, with tubes of slightly varying diameter size, when the outside dia-meter of the split ring of the end cap adapter is smaller than the internal diameter of the tube, the diameter of the split ring automatically increases to positively grip the internal surface of the tube during ini.tial rotation of the tube by .~ . . .
. --10--the driving roller.
From the foregoiny description of a preferred embodi-ment of the invention, it can ~e seen tha-t the irnproved strand winding device with support cap adapters having self-adjusting projections for frictionally gripping the internal end surfaces of a yarn support tube provides positive engagement of the tube at all times during its rotation by the driving roller of the device, and compensates for tubes of varyiny internal diameter size to prevent relative movement of the tubes and support cap adapters during yarn package formation, thus eliminating pro-blems inherent in the prior art devices.
~ --11--
In high speed winding devices for collecting strand matèrial, such as textile yarns, in package form, it is a com-mon practice to collect the yarns after processing on a peri-pherally driven tubular carrier. Typically, yarns subjected to a texturizing or other heat treating operation, such as on a false twist machine, are collected on paper or plastic tubes, with each tube being engaged by and supported at its ends for rotation on end caps, or adapters, which are in turn mounted for free rotation on spaced support arms. After supporta~ly positioning the tu~e on the end caps, the tube is placed in rotation by bringing it into peripheral engagement with a driv-ing roller which frictionally contacts the outer surface of the tube and yarn being collected thereon to rotate the package.
It is further a practice in forming such yarn pack-ages to provide an initial small amount of yarn adjacent one end of the tube outside the main portion of the yarn package formed on the tube. This small amount of yarn, re~erred to as a yarn "transfer tail", is utilized subsequently to connect the yarn strand in one package to a yarn strand in another yarn package for continuous yarn supply in further yarn handl-ing operations.
In collection of yarns on textile yarn processing machines having a continuous yarn feed, it is the practice, when doffing a yarn package at a collection position, to tem-..,.,`P ~
75~
porarily direct the oncoming yarn to "waste" until a full yarn packa~e is removed and a new support tube is inserted at the co~lection position. Such i5 generally accomplished by use of a suction device located adjacent the yarn collection position into which the moving yarn strand passes during doffing. Upon completion of doffing and insertion of a new yarn support tube at the collection position, the tube is brought into engagement with the driving roller to rotate the tube. The moving yarn strand being fed to waste is then guided by the machine opera-tor into a yarn holding guide adjacent one end of the tubeand then is passed into a cutting device mounted on the adja-cent end cap supporting the tube. This operation cuts the yarn from the waste portion of yarn and starts a yarn transfer tail build-up on the end of the tubular carrier~ After suffi-cient build-up of the transfer tail, the yarn is then removed from the holding guide into the yarn traverse guide machanism adjacent the surface of the carrier which moves in a programmed manner across the yarn carrier to build the yarn package.
In prior art devices of the type above described, difficulties have been encountered in transfer tail formation due to undesirable relative movement between the driven yarn support tube and the end caps, or adapters, which hold the -tube for rotational movement. Because of slight variations in diameters of the support tubes, the rotatably driven tubes often move relative to the supporting end caps during rotation, causing yarn in the transfer tails to become entangled or dis-lodged from the support tube during the yarn cutting operation.
Relative movement between the end caps and tube precludes in-stantaneous cutting and pulls the yarn strand onto or off of the tube, resulting in improper transfer tail formation and lost time for clearing the entangled yarn from the winding devlce .
; 2-'7~i~7 In addition, wi-t~l yarn support tubes of varying in ternal diameters, the tubes often becorne misaligned or wobble on the support caps during the winding operation, Lesulting in impropex package build-up on the tube and poor packaye formation.
It has been known to provide adapters for attac~ent to a rotatably driven spindle for securely positively engaging internal portions of a yarn carrier rotatably driven thereby.
My prior U, S. Patent 3,695,561 describes one such device.
However, it has not been known to provide adjustable end caps for positive engagement of yarn tube carriers in winding de-vices of the surface-driven package type described above, or to accomplish the ends and improvements obtained by the present invention described herein.
It is therefore an object of the present invention to provide an improved yarn package winding device and support cap, or adapter, for engaging and supporting ends of a surface-driven yarn support tube to preclude relative motion between the end cap and the surface driven tube mounted for rotation thereon.
It is a more specific object to provide an improved end cap adaptor for a tubular carrier which ensures efficient yarn transfer tail formation and positive rotational support of yarn tube carriers having varying internal dimensions.
In accordance with one aspect of the present invention, there is provide an improved end cap adapter for supporting an end of a peripherally driven, tubular yarn carrier during ro-tation thereof, comprising: a~ a support cap having a central rotational axis and a radially extending ed~e portion; b) cen-tral, axially extending projection means on one face of saidsupport cap, said projection means having a plurality of radial protrusions spaced about the central axis of said cap, 75~)7 c) means on said cap for mountin~ the cap on a support rnemb~r for free rotation about its central rotational axis, and d) a resilient, radially expandab]e ring mounted on said cen-tral projection means of said cap, said ring having an outer peripheral surface with means thereon for frictionally engag-ing the inner wall surface of a tube carrier received there-over, and an inner surface having a configuration to be loose-ly received about said cap projection means with said radial protrusions of the cap projection means being matingly received in correspondingly spaced recessed portions in the inner sur~
face of the ring, whereby rotation of a tube carrier received on said ring causes slight relative rotational movement of said ring about said projection means to move said protrusions out of said recesses to expand the diameter of the ring against the inner wall of the tube carrier.
In accordance with a further aspect of the present invention, there is provided in a yarn strand collection and package forming device including a driving roller, support means including a pair of spaced support arms having a pair of opposed, freely rotatable end cap adapters for supportably engaging end portions of a yarn support tube for rotation there-with, means for moving said support arms and end cap adapters to position a yarn support tube supported thereby in engagement with the driving roller to impart rotation to the tube during yarn collecting operations, and guide means for directing a yarn strand onto the surface of a rotating support tube posi~
tioned between said end caps for formation of a yarn transfer tail and for build-up of a yarn package thereon, the improve-ment therein wherein each of said end cap adapters comprises:
a) a support cap having a central rotational axis and a radial-ly extending edge portion, b3 means attaching said cap to a support arm of the package forming device for free rotation t - 4~
~75~J~
about its central rotatlonal axis, c) a ce~tral, axially ex-tending projection on one face of said suppor-t cap and extend-ing towards said opposed end cap adapter, said projection having a peripheral sur~ace with a plurality o~ radial pro-trusions spaced thereabout, and d) a resilient split ring mounted on said central projection of said cap, said ring hav-ing an outer peripheral surface with means thereon for ~ric-tionally engaging the inner wall surface o~ a tubular carrier received thereover, and an inner surface of said ring having a configuration to be loosely received about said cap projection in mating relation thereto, and with spaced recessed portions in the inner surface of the ring receiving said peripheral pro-trusions of the cap projection whereby rotation of a tubular carrier supportably received on said ring causes slight ini-tial relative rotational movement of said ring relative to said cap projection to expand the diameter of the split ring against the inner wall of the tube carrier and ensure nonre-lative movement of the carrier and end cap during yarn pack-age formation on the yarn carrier~
The above, as well as other objects of the present invention will become more apparent, and the invention will be better understood from the following detailed description of a preferred embodiment ol the invention, when taken together with the accompanying drawings, in which:
Figure 1 is a schematic f.ront view of a textile yarn collection device of a textile yarn processing machine, wherein the yarn package is rotated during collection by peripheral engagement with a driving roller;
Figure 2 is an enlarged side cross-sectional eleva-tion view of an end cap adapter of the present invention which is employed to grippingly engage the inner end portions of a tubular yarn carrier on the collection device seen in Figure l;
~ ,. --5 ~" "., Figure 3 is a cro~s-sectional view of the end cap adapter of the present invention, taken generally along line III-III of Figure 2;
Figure 4 is a cross-sectional view of the end cap adapter as seen in Figure 3, but showing the split ring of the adapter in the position it assumes during rotation of a tubular carrier supported thereon, and Figure 5 is an exploded perspective view of the end cap adapter of Figures 2-4, showiny the support elements for attaching the adapter for free rotation on the support arm of the winding device shown in Figure 1.
Referring more specifically to the drawings, Figure 1 illustrates a yarn package collection device 10 of a textile yarn processing machine, not shown. As is well known in the art, a yarn strand 12, after suitable processing, is continu-ously directed by yarn traverse guide means 14 onto the sur-face of a yarn tube carrier 16 and w~und package 17 (shown in dashed lines) which is supported at each end for rotation about its longitudinal central axis on end cap adapters 18, 20.
Each of the end cap adapters are, in turn, mounted for free rotation about its central axis on spaced support arms 22, 24 by suitable shaft and bearing means more particularly shown in Figure 5.
Support arms 22, 24 are pivotally attached to a sup-port frame member 30 to permit the yarn carrier tube 16 and any yarn collected thereon to be pivoted into and out of peripheral engagement with a driving roller 32, as is well known in the art. Positioned adjacent the surface of the carrier tube 16 when the tube is in driven engagement with the roller is the conventional yarn traverse rnechanism 14, and yarn transfer tail guide 36. Also located adjacent the yarn collection de-vice of the textile processing machine is a pneumatic suctlon 7~7 device or tu~e 3~, which r~ceives the oncorn:ing yarn ~trand for collection as waste during the yarn package doffing operation, as is known in the art.
In conventional yarn package doffing operations on a yarn processing machine having continuous yarn strand feed to the yarn collection point, upon completion of package for-mation on the support tube, the yarn package is pivoted by support arms 22, 24 out of driving engagement with the driving roller 32, and the oncoming yarn strand is separated from the package yarn and directed to the waste collection suction device 36. The yarn package is then removed from the end caps 18, 20 by sideways pivotal movement of one of the su~port arms 22 to disengage the ends of the tube from each of the end cap adapters.
~ n empty support tube is then placed into engagement with the end cap adapters and the tube pivoted into rotational engagement with the driving roller 32. The moving yarn strand passing to waste is then placed manually into the transfer tail guide 36 adjacent one end of the yarn tube and pulled by the operator across the peripheral surface of the adjacent end cap 20. As seen in Figures 2-5, the periphery of the end cap 20 is provided with a plurality of inverted V-shaped notches 39 having sharp inner surfaces which serve to grip and sever the oncoming yarn strand from the waste portion, as the on-coming strand is guided by guide 36 to form a plurality of yarn wraps 37 about the adjacent end of the yarn carrier tube 16. After a sufficient length of transfer tail has been placed on the end of the tube, the yarn is removed from the transfer tail guide 36 and the yarn traverse guide 34 there-after directs the yarn in programmed manner across the tube tobuild the yarn package 17 thereon.
As heretofore mentioned, i-t is co~lmon in the art ., . .~
~ 7-that yarn support tubes of the type described have s~iyht variances in their internal diameters as a result of manufac-turing tolerances, wear, handllng or the like. It is thus ~requently the case that the end cap projections on which the ends of the tube are received do not precisely fit the inter-nal diameters of the tubes to be placed thereon, causing im-proper alignment of the tubes on the supporting end caps, as well as slippage and relative rotational movement between the end caps and the tube during rotation of the tube by the driving roller. In such cases, improper yarn package formation occurs during the winding operation. In particular, when the oncoming yarn strand 17 is cut from the waste portion during formation of the transfer tail on the tube, engagement of the yarn with the cutting device on the end cap periphery causes the end cap to slip relative to the rotating tube and not properly cut the yarn when the tube is loosely received on the end cap. As can be appreciated, when the yarn is not quickly or properly cut, the attempted cutting operation can either dislocate the transfer tail 37 from its proper position on the tube or pull waste yarn into the winding device to en-tangle the same.
By means of the improved end cap adapter construction illustrated more particularly in Figures 2-5, projections on the end caps which engage the internal diameter of the tubes are self-adjusting in diameter during rotation of the yarn support tube to ensure positive grip of the tube and non-rela-tive movement of the end caps and support tube during initial transfer tail formation as well as throughout the yarn package winding operation. As seen in Figures 2-~, which are enlarged cross-sectional views of the end cap adapter 20 shown in ex-ploded view in Figure 5, each of the end caps of the present invention is of generally identical construction and comprises a generally circular main body portion 40 haviny a central rota-tional axis and a rad:ially extendin~ edge portion 42.
Spaced equally a~o~lt the edge portion of the cap are a plura-lity of inverted V-shaped notches 39 having sharp beveled edges which serve as a gripping and cutting surface for a yarn strand pulled into engagement with the periphery of the rotat-ing cap during a transfer tail forming operation.
Axia~ly extending from one face of the cap is a central projection 44 having a peripheral surface extending generally parallel to the central rotational axis of the cap.
As best seen in Figure 3 and 4, the peripheral surface of the cap projection has a plurality of generally straight flat sur-faces 48 spaced about the periphery by intervening protrusions 50 which have a generally arcuately curved surface. Spaced axially outwardly from the protrusions and extending about the periphery of the projection 44 is a circular groove 52 (Figure 2).
llhe opposite face of the end cap (Figure 2) is pro-vided with a central recess having a plurality of spaced resi-lient fingers 54 disposed therein in circular array. Friction-ally received and retained within the fingers is a ring ball bearing 56 (Figure 5) which surrounds a bushing 58. Shaft mounting means, shown as a threaded bolt 60, washer 60a, spacer 60b, and nut 61, extends through the central opening of the cap 20, ring bearing 56, bushing 58, and a thread guard cup 61a to secure the end cap to the support arm of the winding device. In this manner, the end cap is supported on the support arm for free rotation about its central axis during rotation of the yarn tube by the driving roller of the winding device.
As seen in Figures 2-5, surrounding the central pro-jection 44 on the end cap is a resilient, radially expandable ~ ~, g_ ` ~3 ~7~)~
ring, shown as a spli~ ring 62 having an external peripheral surface containing a plurality of raised ribs 64. I~e inner surface of the split ring is configured with a plurality of spaced flat surfaces 65 wi~h intervening recessed portions 66 so as to be matingly received around the projection, with the peripheral protrusions 50 of the projection residing in the corresponding recesses 66 of the split ring (Figure 3). The split ring is secured loosely on the projection 44 by means of a radiaily inwardly extending circular flange, or lip 68 (Figure 2) which resides in circular groove 52 on the cap projection so as to resist displacement of the ring from the projection 40 in an axial direction with respect to the rotat-ional axis of the cap 20.
- As seen in Figure 3, when the end cap adapters are not in rotation, the split ring is loosely secured on the cap projection with the radial protrusions of the projection re-siding in the correspondingly shaped recesses on the inner surface of the ring. When the cap projection and split ring supported thereon are inserted into the end of the tubular yarn carrier, and the yarn carrier placed in rotation by en-gagement with the driving roller, the split ring 62 is caused to rotate slightly relative to the end cap projection 40 to move protrusions 50 on the end cap projection out of recesses 66 and into frictional engagement with the flat surface por-tions 65 of the inner surface of the ring, as seen in Figure 4, thereby expanding the ring against the internal surface of tube 16 to securely and positively grip the same~ Thus, with tubes of slightly varying diameter size, when the outside dia-meter of the split ring of the end cap adapter is smaller than the internal diameter of the tube, the diameter of the split ring automatically increases to positively grip the internal surface of the tube during ini.tial rotation of the tube by .~ . . .
. --10--the driving roller.
From the foregoiny description of a preferred embodi-ment of the invention, it can ~e seen tha-t the irnproved strand winding device with support cap adapters having self-adjusting projections for frictionally gripping the internal end surfaces of a yarn support tube provides positive engagement of the tube at all times during its rotation by the driving roller of the device, and compensates for tubes of varyiny internal diameter size to prevent relative movement of the tubes and support cap adapters during yarn package formation, thus eliminating pro-blems inherent in the prior art devices.
~ --11--
Claims (12)
1. An improved end cap adapter for supporting an end of a peripherally driven, tubular yarn carrier during rotation thereof, comprising:
a) a support cap having a central rotational axis and a radially extending edge portion;
b) central, axially extending projection means on one face of said support cap, said projection means having a plura-lity of radial protrusions spaced about the central axis of said cap;
c) means on said cap for mounting the cap on a sup-port member for free rotation about its central rotational axis; and d) a resilient, radially expandable ring mounted on said central projection means of said cap, said ring having an outer peripheral surface with means thereon for frictionally engaging the inner wall surface of a tube carrier received thereover, and an inner surface having a configuration to be loosely received about said cap projection means with said radial protrusions of the cap projection means being matingly received in correspondingly spaced recessed portions in the inner surface of the ring, whereby rotation of a tube carrier received on said ring causes slight relative rotational move-ment of said ring about said projection means to move said protrusions out of said recesses to expand the diameter of the ring against the inner wall of the tube carrier.
a) a support cap having a central rotational axis and a radially extending edge portion;
b) central, axially extending projection means on one face of said support cap, said projection means having a plura-lity of radial protrusions spaced about the central axis of said cap;
c) means on said cap for mounting the cap on a sup-port member for free rotation about its central rotational axis; and d) a resilient, radially expandable ring mounted on said central projection means of said cap, said ring having an outer peripheral surface with means thereon for frictionally engaging the inner wall surface of a tube carrier received thereover, and an inner surface having a configuration to be loosely received about said cap projection means with said radial protrusions of the cap projection means being matingly received in correspondingly spaced recessed portions in the inner surface of the ring, whereby rotation of a tube carrier received on said ring causes slight relative rotational move-ment of said ring about said projection means to move said protrusions out of said recesses to expand the diameter of the ring against the inner wall of the tube carrier.
2. Apparatus as defined in claim 1 including means on said edge portion for engaging and cutting a strand of yarn to be wound on a tube carrier supported by said cap during rotation of the cap.
3. Apparatus as defined in claim 1 wherein said cap pro-jection means includes a peripheral surface having a plurality of spaced generally straight surface portions extending in planes generally parallel to the central axis of rotation of the cap, and each of said radial protrusions comprises a curved portion of the peripheral surface of the projection means, said curved portion having a common radius of curvature about said cap central axis of rotation, and said curved surface portions being spaced about said cap projection means peripher-al surface between said straight surface portions thereof.
4. Apparatus as defined in claim 3 wherein said radially expandable ring is a split ring, each of said recess portions of the inner surface of said split ring are generally arcuately curved surface portions corresponding in length to said curved portion of the peripheral surface of the cap projection means, and intervening straight portions of said inner surface of the split ring generally corresponding in length to the straight surface portions of the peripheral surface of said cap projec-tion means.
5. Apparatus as defined in claim 3 wherein the peripher-al surface of said cap projection means includes a groove ex-tending therearound; and said ring inner surface includes a radially inwardly extending circular flange matingly received in said groove of the peripheral surface of the cap projection means to resist displacement of the split ring from the pro-jection means in an axial direction with respect to the rotat-ional axis of the cap.
6. In a yarn strand collection and package forming de-vice including a driving roller, support means including a pair of spaced support arms having a pair of opposed, freely rotatable end cap adapters for supportably engaging end por-tions of a yarn support tube for rotation therewith, means for moving said support arms and end cap adapters to position a yarn support tube supported thereby in engagement with the driving roller to impart rotation to the tube during yarn collecting operations, and guide means for directing a yarn strand onto the surface of a rotating support tube positioned between said end caps for formation of a yarn transfer tail and for build-up of a yarn package thereon; the improvement there-in wherein each of said end cap adapters comprises:
a) a support cap having a central rotational axis and a radially extending edge portion;
b) means attaching said cap to a support arm of the package forming device for free rotation about its central rotational axis;
c) a central, axially extending projection on one face of said support cap and extending towards said opposed end cap adapter, said projection having a peripheral surface with a plurality of radial protrusions spaced thereabout; and d) a resilient split ring mounted on said central pro-jection of said cap, said ring having an outer peripheral sur-face with means thereon for frictionally engaging the inner wall surface of a tubular carrier received thereover, and an inner surface of said ring having a configuration to be loosely received about said cap projection in mating relation thereto, and with spaced recessed portions in the inner surface of the ring receiving said peripheral protrusions of the cap projec-tion whereby rotation of a tubular carrier supportably received on said ring causes slight initial relative rotational movement of said ring relative to said cap projection to expand the dia-meter of the split ring against the inner wall of the tube carrier and ensure nonrelative movement of the carrier and end cap during yarn package formation on the yarn carrier.
a) a support cap having a central rotational axis and a radially extending edge portion;
b) means attaching said cap to a support arm of the package forming device for free rotation about its central rotational axis;
c) a central, axially extending projection on one face of said support cap and extending towards said opposed end cap adapter, said projection having a peripheral surface with a plurality of radial protrusions spaced thereabout; and d) a resilient split ring mounted on said central pro-jection of said cap, said ring having an outer peripheral sur-face with means thereon for frictionally engaging the inner wall surface of a tubular carrier received thereover, and an inner surface of said ring having a configuration to be loosely received about said cap projection in mating relation thereto, and with spaced recessed portions in the inner surface of the ring receiving said peripheral protrusions of the cap projec-tion whereby rotation of a tubular carrier supportably received on said ring causes slight initial relative rotational movement of said ring relative to said cap projection to expand the dia-meter of the split ring against the inner wall of the tube carrier and ensure nonrelative movement of the carrier and end cap during yarn package formation on the yarn carrier.
7. Apparatus as defined in claim 6 wherein said peri-pheral surface of said cap central projection comprises a plurality of spaced, generally straight surface portions ex-tending in planes generally parallel to the central axis of rotation of said cap, and each of said protrusions comprise a curved portion of said peripheral surface having a common radius of curvature about said cap central axis of rotation, with said curved surface portions being spaced about said cap projection between said straight surface portions.
8. Apparatus as defined in claim 7 wherein each of said recessed portions of the inner surface of said split ring are generally arcuately curved surface portions corresponding generally in length to said curved surface portions of peri-pheral surface of said support cap central projection, and intervening straight surface portions of said ring inner sur-faces generally corresponding in length to said straight sur-face portions of the peripheral surface of said cap projection.
9. Apparatus as defined in claim 6 including means on said edge portion for engaging and cutting a strand of yarn to be wound on a tube carrier supported between said end cap adapters and during rotation of said cap.
10. Apparatus as defined in claim 9 wherein said guide means for directing a yarn strand onto the surface of a rotat-ing support tube positioned between said caps of said package forming device comprises a yarn traverse guide positioned ad-jacent said driving roller to traverse a yarn over the major portion of a support tube mounted on said caps, and a guide member positioned adjacent one of said end cap adapters to direct a yarn cap into engagement with an end portion of a support tube for formation of a yarn transfer tail thereon during rotation of the tube by said driving roller; and said means on said edge portion of said support cap for engaging and cutting a strand of yarn comprises a plurality of spaced gen-erally inverted V-shaped notches having sharp edge portions for receiving, engaging and cutting a yarn strand directed thereinto during rotation of said cap.
11. Apparatus as defined in claim 10 wherein said cap and split ring are comprised of plastic.
12. Apparatus as defined in claim 6 including means adjacent said package forming device for collecting a running yarn strand as waste yarn during doffing of a yarn support tube from said end cap adapters supporting the tube for rotat-ion thereon.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US2279179A | 1979-03-22 | 1979-03-22 | |
| US22,791 | 1979-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1117507A true CA1117507A (en) | 1982-02-02 |
Family
ID=21811470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000329762A Expired CA1117507A (en) | 1979-03-22 | 1979-06-14 | Strand winding device and support cap for yarn tube carriers |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA1117507A (en) |
| DE (1) | DE2923320A1 (en) |
| FR (1) | FR2451879A1 (en) |
| GB (1) | GB2044813B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2504104A1 (en) * | 1981-04-15 | 1982-10-22 | Asa Sa | Device for mounting yarn tube in winding head - comprising flanged centering ring incorporating expandable split ring |
| FR2523100A1 (en) * | 1982-03-10 | 1983-09-16 | Asa Sa | DEVICE FOR POSITIONING AND MAINTAINING A WIRE SUPPORT TUBE DURING A WINDING OPERATION |
| US4516786A (en) * | 1983-03-08 | 1985-05-14 | Lund Arnold M | Core chuck |
| DE3324309A1 (en) * | 1983-07-06 | 1985-01-17 | Erwin Kampf Gmbh & Co Maschinenfabrik, 5276 Wiehl | SELF-TENSIONING REEL |
| DE3335990C2 (en) * | 1983-10-04 | 1985-11-28 | Saurer-Allma Gmbh, 8960 Kempten | Bobbin holder |
| DE8328512U1 (en) * | 1983-10-04 | 1985-03-14 | Saurer-Allma Gmbh, 8960 Kempten | REEL HOLDER |
| GB9510826D0 (en) * | 1995-05-23 | 1995-07-19 | Rieter Scragg Ltd | Yarn winding mechanism |
| GB9510825D0 (en) * | 1995-05-23 | 1995-07-19 | Rieter Scragg Ltd | Package support device |
| DE19637298A1 (en) * | 1996-09-13 | 1998-03-19 | Schlafhorst & Co W | Bobbin winder sleeve centering plate |
| DE10218993A1 (en) | 2002-04-27 | 2003-11-06 | Schlafhorst & Co W | Frame-mounted rotating sleeve plate for textile spinning machine has a base with a clamping cone and a clamping ring free with respect to the base |
| DE102009048611A1 (en) * | 2009-10-08 | 2011-04-14 | Oerlikon Textile Gmbh & Co. Kg | winding device |
| CN108879489A (en) * | 2018-08-10 | 2018-11-23 | 安徽新网讯科技发展有限公司 | Electric wire pulling device in a kind of pipe for building intellectualization installing engineering |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL261696A (en) * | 1960-03-08 | |||
| US3272447A (en) * | 1964-06-23 | 1966-09-13 | Du Pont | Chuck for tubular cores |
| US3345006A (en) * | 1965-09-02 | 1967-10-03 | Ind Devices Inc | Collet assembly |
| AT269703B (en) * | 1965-12-01 | 1969-03-25 | Vyzk Ustav Bavlnarsky | Swiveling two-armed bobbin holder for textile machines |
| IT1005233B (en) * | 1973-10-12 | 1976-08-20 | S Spa Off | IMPROVEMENTS TO THE ROLL HOLDER ARMS WITH TAILSTOCKS PARTICULARLY FOR AUTOMATIC WINDING MACHINES AND ARMS THUS PERFECTED |
| FR2283847A1 (en) * | 1974-09-05 | 1976-04-02 | Roannais Const Textiles Atel | Yarn winding device comprises bobbin driven by contact with drive roll - and held between end flanges having a centrifugal locking device |
-
1979
- 1979-06-08 DE DE19792923320 patent/DE2923320A1/en not_active Ceased
- 1979-06-13 GB GB7920652A patent/GB2044813B/en not_active Expired
- 1979-06-14 CA CA000329762A patent/CA1117507A/en not_active Expired
- 1979-08-17 FR FR7920863A patent/FR2451879A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE2923320A1 (en) | 1980-10-02 |
| GB2044813B (en) | 1983-05-11 |
| GB2044813A (en) | 1980-10-22 |
| FR2451879A1 (en) | 1980-10-17 |
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry |