US3923260A - Apparatus for doffing without interrupting spinning operation in an open end spinning machine - Google Patents

Apparatus for doffing without interrupting spinning operation in an open end spinning machine Download PDF

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Publication number
US3923260A
US3923260A US497133A US49713374A US3923260A US 3923260 A US3923260 A US 3923260A US 497133 A US497133 A US 497133A US 49713374 A US49713374 A US 49713374A US 3923260 A US3923260 A US 3923260A
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US
United States
Prior art keywords
empty bobbin
roller
bobbin
empty
spinning
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
US497133A
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English (en)
Inventor
Waichi Sakurai
Katsunori Sato
Tomoyuki Miyagawa
Hisateru Takahashi
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Daiwa Boseki KK
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Daiwa Boseki KK
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 Daiwa Boseki KK filed Critical Daiwa Boseki KK
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Publication of US3923260A publication Critical patent/US3923260A/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/04—Arrangements for removing completed take-up packages and or replacing by cores, formers, or empty receptacles at winding or depositing stations; Transferring material between adjacent full and empty take-up elements
    • 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

  • a doffing device is used in an open end spinning machine having a plurality of spinning units arranged side-by-side at a predetermined interval, a withdrawing roller for withdrawing a spun yarn from each spinning unit, and a split drum for traversing the withdrawn spun yarn for winding it on a bobbin.
  • the doffing device includes a plurality of arms arranged along the machine, at such interval, between the withdrawing roller and the split drum. Each arm has at an intermediate portion thereof an empty bobbin supporting roller and at a free end thereof a plate spring with an empty bobbin pressing roller mounted on each plate spring.
  • Each empty bobbin supporting roller has an intermediate flange to position end portions of two adjacent empty bobbins supported in adjacent empty bobbin receiving spaces formed by respective supporting rollers and pressing rollers in cooperation with the split drum.
  • the present invention relates to a method of and apparatus for performing a doffing operation without interrupting a spinning operation in an open end spinning machine.
  • the doffing method heretofore practiced in an open end spinning machine requires a pair of workers to cooperate with each other in such a manner that while one of them is removing a full bobbin from the cradle, the other cuts the spun yarn at a point between the withdrawing roller and the split drum in timed relation to the removing of the full bobbin and winds the end of the yarn on the spinning unit side around an empty bobbin held in his hand whereupon he mounts the empty bobbin on the holder by pushing the cradle open and moves the cradle to its normal position to bring the empty bobbin into contact with the split drum to continue the winding operation.
  • the object of the present invention is to provide a method and device which eliminate the drawbacks of the prior art described above and which enable the exchange of bobbins to be effected easily and efficiently by a single worker without interrupting the spinning operation.
  • a method of doffing without interrupting the spinning operation in an open end spinning machine including the stepsof cutting a spun yarn between a withdrawing roller and a split drum, winding the spun yarn which is being withdrawn by means of the withdrawing roller by a fresh empty bobbin which is pressed against said split drum and rotated thereby, removing a full bobbin from its winding position, and then transferring the fresh bobbin to the normal winding position.
  • a device fordoffing'without interrupting the spinning operation in an open end spinning machine of the type including a frame, a plurality of spinning units arranged side-by-side at a predetermined interval, each spinning unit having a withdrawing roller for withdrawing a spun yarn from the spinning unit and a split drum for traversing the withdrawn spun yarn and winding it on ,a bobbin.
  • the doffing device includes a plurality of arms arranged along the frame at such interval, each arm located between the withdrawing roller and the split drum and extending forwardly of the machine frame.
  • An empty bobbin supporting roller is rotatably mounted on an intermediate portion of each arm, the supporting roller having at an intermediate portion thereofa flange.
  • a plate spring is secured to the free forward end of each arm.
  • An empty bobbin pressing roller is rotatably mounted on each plate spring.
  • Each supporting roller and respective pressing roller are located so as to define a separate empty bobbin receiving space in cooperation with the split drum.
  • Each plate spring is adapted to resiliently urge the respective pressing roller in a direction in which an empty bobbin is pressed against the split drum by means of the pressing roller when the empty bobbin is placed in therespective empty bobbin receiving space.
  • Each empty bobbin supporting roller and respective empty bobbin pressing roller are arranged so that they straddle the adjacent end portions of two adjacent empty bobbins when such bobbins are placed in respective adjacent empty bobbin receiving spaces.
  • Each supporting roller flange operates to position adjacent end portions of such adjacent empty bobbins.
  • FIGS. 1 through 3 are schematic side elevational views of the device according to the present invention and showing various steps of the operation of the device;
  • FIG. 4 is a perspective view of the device according to the present invention which is incorporated with an open end spinning machine.
  • FIG. 1 there is illustrated the device according to the present invention in a condition immediately before the exchange of bobbins.
  • a spun yarn 2 from a spinning unit 1 passes over a traverse rod 3 and is withdrawn by a withdrawing roller 4 and a top roller 5 toward a split drum 12 and is finally wound on a bobbin l3.
  • a supporting bracket 6 is provided, for example one for each 10 spinning units.
  • the supporting bracket 6 is disposed between withdrawing roller 4 and split drum 12, is extended in parallel with the spinning machine and is fixed to the machine frame.
  • each arm 7 On the supporting bracket 6 there are mounted arms 7, at least one arm 7 being provided for each spinning unit, and each arm 7 projecting forwardly of the machine frame.
  • an empty bobbin supporting roller 8 In theintermediate portion of each of the arms, there is rotatably mounted an empty bobbin supporting roller 8., The roller 8 extends in parallel with the split drum l2 and is provided with a flange 9 in the middle portion of the length thereof for positioning an empty bobbin 14 in opposed relation to the split drum 12.
  • a plate spring 10 is secured to the free forward end of the arm 7 and an empty bobbin pressing roller 11 is rotatably mounted on the plate spring 10 in parallel with the split drum 12.
  • the empty bobbin supporting roller 9 and the empty bobbin pressing roller 11 are located so as to define an empty bobbin receiving space in cooperation with split drum l2, and plate spring 10 is adapted to resiliently urge empty bobbin pressing roller 11 in a direction in which an empty bobbin is pressed against split drum 12 by means of the pressing roller when the empty bobbin is placed in empty bobbin receiving space 15.
  • a worker takes in his one hand a fresh empty bobbin 14 prepared at each spinning unit and cuts by the other hand the spun yarn 2 at a point between the withdrawing roller 4 and the split drum l2 and winds the end portion of the yarn at the spinning unit side around the empty bobbin 14. Then the worker pushes fresh bobbin 14 into empty bobbin receiving space 15 defined by the rollers 8 and 11 and splitdrum 12.
  • the pushed-in empty bobbin 14 is positively held by the three members 8, 11 and 12 and pressed against the split drum 12 by the elastic action of the plate spring 10 so that it is frictionally rotated by means of the split drum 12 in the direction designated by the arrow to wind the spun yarn 2 thereon.
  • FIG. 4 is a perspective view showing a device according to the present invention installed on an open end spinning machine, such device being shown in its operating condition.
  • one arm 7 is provided for each spinning unit 1.
  • the empty bobbin supporting roller 8 is rotatably mounted on the intermediate or middle portion of the arm 7 and extended in parallel with the split drum at one side of the arm 7.
  • the arm 7 and the supporting roller 8 are so located that the supporting roller 8 straddles the adjacent end portions of two adjacent empty bobbins 14 when such bobbins are placed in respective empty bobbin receiving space 15, and the flange 9 is provided on the intermediate portion along the length thereof so that the flange 9 serves as a positioning means common to the adjacent end portions of the two adjacent empty bobbins 14.
  • the empty bobbin pressing roller 11 straddles the adjacent end portions of two adjacent empty bobbins.
  • the empty bobbin 14 is positively held and positioned against the split drum 12 by providing only one arm 7, one supporting roller 8 and one pressing roller 11 for each spinning unit 1. This arrangement simplifies the entire construction of the device according to the present invention and permits easy access to the empty bobbin 14.
  • each arm 7 carries the rollers 8 and 11, and each empty bobbin 14 is supported and positioned by a pair of supporting rollers 8 and a pair of pressing rollers 11 provided exclusively for that empty bobbin 14.
  • the reference numeral 16 designates a stationary rod on which a housing 17 is mounted for each spinning unit 1.
  • the reference numeral 18 designates a lever having its one end connected to the housing 17 and on the other end thereof the top roller 5 is rotatably mounted. On the intermediate portion of the lever 18, there is mounted a yarn guide 19 by means of a screw 20.
  • a spring means for resiliently urging the lever 18 to press the top roller 5 against the withdrawing roller 4 at a substantially constant pressure.
  • Such elements l6, l7, l8, l9 and 20 do not constitute a part of the present invention, and, therefore, are not shown in FIGS. 1 through 3 for the simplicity of the drawings.
  • the bobbin 13 is not shown for the same purpose.
  • the present invention enables a single worker to efficiently perform a doffing operation at the time of bobbin exchange without stopping the spinning operation of the spinning unit, thereby contributing much to the utilization of personnel.
  • a device for doffing a wound bobbin without interrupting the spinning operation in an open end spinning machine of the type including a frame, a plurality of spinning units arranged in side-by-side relation at a predetermined interval, each said spinning unit having a withdrawing roller for withdrawing a spun yarn from the spinning unit, and a split drum for traversing the withdrawn spun yarn for winding it on a bobbin; said device comprising: i
  • each of said arms being located between said withdrawing roller and said split drum and extending forwardly of said machine frame; an empty bobbin supporting roller rotatably mounted on an intermediate portion of each of said arms;
  • each said supporting roller and respective pressing roller being located so as to define a separate empty bobbin receiving space in cooperation with said split drum;
  • each said plate spring comprising means to resiliently urge said respective pressing roller in a direction in which an empty bobbin is pressed against said split drum by means of said pressing roller when such empty bobbin is placed in said respective empty bobbin receiving space;

Landscapes

  • Spinning Or Twisting Of Yarns (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
US497133A 1973-09-14 1974-08-13 Apparatus for doffing without interrupting spinning operation in an open end spinning machine Expired - Lifetime US3923260A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10443473A JPS5417858B2 (enrdf_load_stackoverflow) 1973-09-14 1973-09-14

Publications (1)

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US3923260A true US3923260A (en) 1975-12-02

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US (1) US3923260A (enrdf_load_stackoverflow)
JP (1) JPS5417858B2 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060207A (en) * 1976-02-10 1977-11-29 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Yarn winding mechanism in spinning machine
US4356691A (en) * 1979-09-29 1982-11-02 Schubert & Salzer Thread drawing-off device and method for the insertion of the _drawn-off thread in an open-end spinning device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118625A (en) * 1960-06-08 1964-01-21 Heberlein Patent Corp Filament winding device
US3370798A (en) * 1963-10-12 1968-02-27 Toyo Rayon Co Ltd Centerless winder
US3561688A (en) * 1964-01-29 1971-02-09 Toyo Rayon Co Ltd Yarn transfer method in the windup operation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118625A (en) * 1960-06-08 1964-01-21 Heberlein Patent Corp Filament winding device
US3370798A (en) * 1963-10-12 1968-02-27 Toyo Rayon Co Ltd Centerless winder
US3561688A (en) * 1964-01-29 1971-02-09 Toyo Rayon Co Ltd Yarn transfer method in the windup operation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060207A (en) * 1976-02-10 1977-11-29 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Yarn winding mechanism in spinning machine
US4356691A (en) * 1979-09-29 1982-11-02 Schubert & Salzer Thread drawing-off device and method for the insertion of the _drawn-off thread in an open-end spinning device

Also Published As

Publication number Publication date
JPS5417858B2 (enrdf_load_stackoverflow) 1979-07-03
JPS5053628A (enrdf_load_stackoverflow) 1975-05-12

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