US3352504A - Apparatus for seizing the yarn ends of spinning cops or similar yarn coils - Google Patents

Apparatus for seizing the yarn ends of spinning cops or similar yarn coils Download PDF

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Publication number
US3352504A
US3352504A US567599A US56759966A US3352504A US 3352504 A US3352504 A US 3352504A US 567599 A US567599 A US 567599A US 56759966 A US56759966 A US 56759966A US 3352504 A US3352504 A US 3352504A
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Prior art keywords
yarn
cop
coil
length
foot
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US567599A
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English (en)
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Furst Stefan
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    • 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
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • B65H67/086—Preparing supply packages
    • 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

  • My invention relates to apparatus for seizing the yarn ends of spinning cops or silimar yarn coils preparatory to unwinding the coils.
  • the apparatus of my invention is suitable for readying yarn coils having a yarn end which is wound from near the coil tip backwards to the coil foot, wherein the coil foot is placed opposite to at least one nozzle producing an air flow primarily directed axially to the coil.
  • Patent No. 3,031,149 issued Apr. 24, 1962, of which I am a coinventor, there is disclosed a method and apparatus for readying a yarn coil to be unwound in an unwinding operation wherein a yarn end is wound backward from the coil tip to the coil foot, the coil foot being exposed to an air current acting in the axial direction of the coil. Both the outer backwards wound yarn end as well as the inner starting end of the yarn are thereby removed from the coil. Of the two yarn ends which are located in the air current, a portion of the inner starting end of the yarn is severed in the vicinity of the coil core while the outer yarn portion backwardly wound from the coil tip to the coil foot is clamped.
  • a method of this type or an apparatus suitable for carrying out such a method does not however operate fully satisfactorily, since it is absolutely necessary, in order to obtain trouble-free operation, that both of the yarn ends of the coil must lie fully se arated from one another. This is not always readily possible in actual practice because both yarn ends are frequently twisted together in such a way that it is impossible to handle or operate on both yarn ends differently, namely to sever one of the ends while clamping the other end. Consequently, various other suggestions have become known for trouble-free readying of the ends of yarn coils or the like that are to be unwound, which however either provide no assurance for absolutely safe operation under all conditions or require a great deal of expense.
  • I provide in the vicinity of the coil foot, a yarn clamping device for the yarn ends located in the air current which has a clamping force that is smaller than the rupture strength of the cop yarn.
  • the readying of the yarn ends of the coils or the like which are to be unwound then takes place by the yarn clamping device seizing the freely disposed yarn ends which are located in the air current.
  • the yarn clamping device seizing the freely disposed yarn ends which are located in the air current.
  • a particularly secure gripping of the yarn end leading from the coil foot to the tip can also be achieved with smooth yarns especially if at least one side or jaw of the clamp is comprised of elastic material whose coeflicient of friction is greater than that of the yarn material.
  • the clamping device and the severing device can be constructed as a single unit.
  • FIG. 1 shows schematically four sequential steps of a readying operation
  • FIG. 2 is an enlarged cross section taken along the line IIII in step III of FIG. 1 in the direction of the arrows;
  • FIG. 3 is a schematic elevational view of an automatic coil winding machine which includes a readying apparatus constructed in accordance with the invention.
  • FIG. 4 is a fragmentary front elevational view of several of the components of the machine shown in FIG. 3.
  • a suction nozzle 2 has been moved from the left toward the foot of the cop so as to form an annular nozzle opening together therewith, the cop and the coil being coaxially aligned.
  • the cop 1 rests upon a support or stop 3 which engages the yarn end a that is to be unwound from the cop by suction from the nozzle 2 and thereby limits the extent of such unwinding.
  • a drive roller located adjacent slideway 6 can simplify the unwinding of the yarn end a by engaging the cop as it is located in the slideway and suitably. rotating the cop in the unwinding direction of the yarn end a.
  • the clamping device shown comprises two parts 4a and 4b between which a middle part 4c is inserted.
  • This middle part 4c is constructed, on the side thereof which is adjacent. to the part 4a, as a severing device when used in combination with the part 4a, whereas the other side of the middle part 40 is provided with an elastic material which is located adjacent to a similar elastic surface provided on the part 4b.
  • elastic material is suitable for this purpose, particularly such materials as rubber, synthetics, or the like.
  • the above-described operation is embodied in the performance. of the automatic coil-winding machine illustrated in FIG. 3.
  • This machine serves to wind. a large yarn package 17, such as a cross-wound coil, from a number of spinning cops. After depletion of a cop, the yarn supplied by the next following cop must first be tied together with the end of the yarn already wound up on the larger yarn package to be produced, before the winding operation is'continued and repeated until the new package has the desired quantity of yarn.
  • FIG. 3 shows one cop just released from the magazine and supported on the stop structure 3 as well as on the top end of the inclined slide 6 mentioned above with reference to FIG. 1. While cop 1 occupies this position, a suction tube 2, pivotally mounted at 2d, is turned clockwise away from position 2 until itssuction nozzle surrounds the cop foot and draws the yarn ends into it. When the nozzle is then removed, the yarn ends are seized by the clamp 4.
  • the cop When thereafter the cop is released, it slides downward along slide 6 through the position denoted by 1'.
  • the outer yarn end now passing from the cop to the clamp 4 is denoted by a.
  • the tubular core of the cop is speared onto a mandrel 11 mounted on a holder 11a pivoted at 11b.
  • the cop By means of holder 11a the cop is thereafter turned to the position denoted by l, Now the cop is ready to operate as a supply coil for the automatic winding means mounted on the machine frame 10.
  • the drum 16 is simultaneously operative in the known manner to reciprocate the oncoming yarn axially along the take-up spool 17- in order to produce the desired cross-wound yarn package.
  • the drive for the shaft 23 is located with in a housing 28 on which an arm 29 is pivotally mounted.
  • Arm 29 is connected by a linking rod 30 with a lock con! trol lever 31 pivoted at 33.
  • the above-mentioned locking rods 8, 9 as well as the stop 3 are linked to the lever 31.
  • Another locking rod 32 is fastened to linking rod 30.
  • the lowermost cop 1 in the magazine 7, resting upon stop 3 is first approached by the suction nozzle 2 which places itself about the cop foot and then operates to pull off the outer yarn end a and the inner yarn end b, as described above. Thereafter, the suction nozzle 2 turns to position 2 so that the clamp 4 can enter between thesuction nozzle 2 and the foot of cop 1. The clamp 4 seizes the yarn ends a and b.
  • the cop then remains in position on stop 3 until it is called upon to substitute a previously depleted yarnsupplying cop in the coil-winding machine. This is done by operation of the lever 31 which removes the stop 3 from the lowermost cop so that the cop 1 now drops along inclined slide 6 through the position 1' onto the mandrel 11. Since the inner yarn end b is shorter than the outer yarn portion a, the end b is pulled out of the clamp 4 while the end a remains gripped thereby. The mandrel 11 then transfers the cop into the position 1". The yarn end is then located between the cop 1", the clamp 4 and the suction nozzle 2.
  • the yarn end Details in design and operation of the clamp 4 are is now placed at a given location, namely between clamp 4 and the suction tube now in position 2, whence it can be seized by the suction arm 22 and conveyed to the knotter 12.
  • the suction arm 22 now turns downwardly along the circular path 21 and seizes the yarn end before the arm returns upwardly to convey the yarn end to the knotter (see, for example, German Patent 923,415).
  • the clamp 4 is opened so that the suction tube 22 can freely entrain the yarn end toward the knotter 12.
  • the clamp shaft 23 is first turned clockwise and the entire clamping device is turned in the same sense until the arm 25 abuts against stop 27. This determines the lowermost position of the clamp 4. While the clamp shaft 23 continues rotating clockwise, the part 40 driven by lever 24 is turned counterclockwise so that the clamp jaws are closed. During return movement of the lever 24, the clamp 4 is first moved back into the position shown in FIG. 4 until the arm 25 abuts against stop 26. During further return movement of arm 25, the clamp mechanism is again opened.
  • the release of the spinning cop 1 in the magazine 7 by the locking rods 8 and 9, the stop 3 and the locking rod 32 is controlled by counterclockwise movement of arm 29. During such movement, the stop 3 is pulled toward the right (FIG. 4) so that the lowermost cop 1 drops out of the magazine 7. An untimely release of the next upper cop 1 is prevented by the rod 32. However, the third upper cop can drop onto the locking rods 8 and 9 as soon as the rod 32 moves back toward the left.
  • Apparatus for readying of cops and the like yarn coils having an inner starting portion of yarn limited in length by the coil windings superimposed thereon and having an outer end portion of a yarn length wound from near the coil tip to the coil foot, comprising an air-current nozzle, means for accommodating the cop in a position wherein the coil foot is located coaxially in front of said nozzle for subjecting the coil to a substantially axial air current for drawing the end portions of yarn into said nozzle, a yarn-clamping device situated near the coil-foot location when the cop is in said position and adapted for clamping the yarn portions in the air current, said device having a clamping force smaller than the rupture strength of the cop yarn, and means causing relative motion between the cop and said yarn-clam ing device so as to increase the length of the outer end yarn portion by partly unwinding the outer yarn length whereby the starting yarn portion of limited length is pulled out of said clamping device so that only the outer end portion remains clamped because of its increased length.
  • said clamping device having two mutually engageable clamping members, at least one of said members being formed of elastic material having a coefi'icient of friction higher than that of the yarn.
  • Cop-readying apparatus com prising yarn-severing means for shortening said clamped end portion of yarn, said clamping device being arranged between said severing means and the coil-foot location of said portion.
  • said severing means forming part of said clamping device.
  • Cop-readying apparatus including a stop member engaging the outer end portion of yarn intermediate the coil tip and the coil foot for limiting unwinding of the outer yarn length by said air-current nozzle.

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  • Spinning Or Twisting Of Yarns (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
US567599A 1965-07-24 1966-07-25 Apparatus for seizing the yarn ends of spinning cops or similar yarn coils Expired - Lifetime US3352504A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER0041165 1965-07-24

Publications (1)

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US3352504A true US3352504A (en) 1967-11-14

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US (1) US3352504A (de)
BE (1) BE684477A (de)
DE (1) DE1560570A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103836A (en) * 1975-06-25 1978-08-01 W. Schlafhorst & Co. Undoing or removing the thread ends of textile bobbins
EP0284590A1 (de) * 1987-03-13 1988-09-28 Picanol N.V. Verfahren um Garnkörper auszuführen und Verfahren und Vorrichtung zum Suchen des Fadens auf dem Garnkörper

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3031149A (en) * 1957-07-29 1962-04-24 Reiners Walter Method and means for readying a yarn coil to be unwound

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3031149A (en) * 1957-07-29 1962-04-24 Reiners Walter Method and means for readying a yarn coil to be unwound

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103836A (en) * 1975-06-25 1978-08-01 W. Schlafhorst & Co. Undoing or removing the thread ends of textile bobbins
EP0284590A1 (de) * 1987-03-13 1988-09-28 Picanol N.V. Verfahren um Garnkörper auszuführen und Verfahren und Vorrichtung zum Suchen des Fadens auf dem Garnkörper
BE1000377A4 (nl) * 1987-03-13 1988-11-16 Picanol Nv Bobijn en draadzoekinrichting die zulke bobijn toepast.

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Publication number Publication date
BE684477A (de) 1967-01-03
DE1560570A1 (de) 1970-10-15

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