(19)
(11) EP 1 457 447 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.04.2005 Bulletin 2005/17

(43) Date of publication A2:
15.09.2004 Bulletin 2004/38

(21) Application number: 04003083.5

(22) Date of filing: 11.02.2004
(51) International Patent Classification (IPC)7: B65H 51/22, B65H 59/18, D01H 4/48
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 13.03.2003 JP 2003067526
14.03.2003 JP 2003070122
17.03.2003 JP 2003072675
17.03.2003 JP 2003072676

(71) Applicant: Murata Kikai Kabushiki Kaisha
Minami-ku, Kyoto-shi, Kyoto 601 (JP)

(72) Inventors:
  • Hirao, Osamu
    Uji-shi Kyoto (JP)
  • Shigeyama, Masazumi
    Shiga-gun Shiga (JP)
  • Yagi, Hiroyuki
    Izumiotsu-shi Osaka (JP)
  • Sawada, Harutoshi
    Charlotte NC 28226 (US)

(74) Representative: Liedl, Christine et al
c/o Hansmann & Vogeser, Albert-Rosshaupter-Strasse 65
81369 München
81369 München (DE)

   


(54) Tension control and slack eliminating device for a yarn winder


(57) The present invention stabilizes a yarn tension in a yarn winder in which a plurality of winding units are disposed, each of the winging units being provided with a yarn slack eliminating device. A transmitted force adjusting mechanism is provided to adjust a rotative driving force transmitted by a slack eliminating roller 21 of a yarn slack eliminating device 10 to an unwinding tension applying member 22. The transmitted force adjusting mechanism can be set so that when a load acting on the unwinding tension applying member 22 increases above a predetermined value, the unwinding tension applying member 22 rotates or rotatively moves independently of the slack eliminating roller 21. When winding tension is weak, the unwinding tension applying member 22 rotates integrally with the slack eliminating roller 21 to tense a yarn. When the winding tension exceeds a predetermined value, the unwinding tension applying member 22 prevents the winding tension from becoming excessive to suppress a variation in tension. When the transmitted force adjusting mechanism is configured so as to vary the force transmitted to the unwinding tension applying member, it is easy to deal with spinning conditions (Fig.4).






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