Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1994-04-12
1996-10-22
Stryjewski, William
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242158R, B65H 5428
Patent
active
055669050
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an apparatus, for winding a plurality of yarns, having a traverse-motion mechanism in which a plurality of traversing units are provided each reciprocating a yarn by means of a plurality of blades secured to a pair of rotors.
BACKGROUND ART
Generally speaking, for taking up yarns extruded from a spinning machine a yarn winder is used. The yarn winder comprises a spindle rotatably carried on a machine frame for carrying bobbins and a traverse-motion mechanism mounted on the machine frame above the spindle while being movable upward and downward or a turret type yarn winder in which a plurality of spindles for carrying bobbins are rotatably carried on a turret member which, in turn, is rotatably mounted on a machine frame.
A traverse-motion mechanism used for a high-speed winder comprises a plurality of traversing units, each consisting of a pair of rotors carried on a frame at a distance from each other, a plurality of blades secured onto the respective rotor, and a yarn guide fixed to the frame so as to be located in the path of a yarn-guiding edge of the blade. The traversing units are arranged at a predetermined pitch in the lengthwise direction of the bobbin-carrying spindle, while a touch roller is rotatably carried on the frame close to the blade of the respective traverse unit at a position downstream thereof.
The blades are positioned around the rotor at an angular pitch of 180.degree. and 120.degree. when the number of blades is two and three, respectively. A pair of rotors, each provided with the same number of blades, are secured on the frame at a distance therebetween and rotatable in the reverse direction to each other.
A traverse-motion mechanism having a plurality of such traversing units is disclosed, for example, in Japanese Examined Patent Publication Nos. 3-72544 (corresponding to the U.S. Pat. No. 4,505,436) and 4-27151 (corresponding to the U.S. Pat. No. 4,505,437).
Recently, spindles tend to be lengthened to increase the number of bobbins (four through eight) to be carried thereon for the purpose of increasing yarn-winding capacity.
The lengthening of spindle, however, causes the increase of a yarn bending angle at a yarn-separating fulcrum directly beneath a godet roller on the upstream side toward a yarn-traversing fulcrum positioned at the respective end of the spindle, which, in turn, results in the deterioration of yarn quality due to the increase of running resistance at the fulcrum. In addition, since the yarn is taken up by a higher winding tension, a yarn package thus obtained is difficult to unwind.
According to the abovesaid limitation of the yarn bending angle at the yarn-separating fulcrum toward the yarn-traversing fulcrum, it is impossible to shorten the distance between the traversing unit and the yarn-traversing fulcrum and that between the yarn-traversing fulcrum and the yarn-separating fulcrum disposed upstream thereof. This increases a height of the yarn-separating fulcrum disposed upstream of the yarn-traversing fulcrum and that of the godet roller disposed at further upstream position, whereby the threading operation becomes difficult. In addition, there is a problem in that a total height of the machine increases, whereby it can be installed only in a building having a high ceiling.
According to the abovesaid traverse-motion mechanism, since the blades mounted on the respective rotors have the same diameter (D) and the rotors are positioned at a distance in the bobbin axial direction. When the first and second rotors are driven from the same side, as shown in FIG. 14, a pitch L between the adjacent traversing units cannot exceed a sum of an outer diameter D of the blades of the rotor and a diameter d of a rotor shaft, i.e., (D+d)/2. For example, if it is assumed that a traversing stroke W is 250 mm, the outer diameter D of blades is 540 mm and the diameter d of a rotor shaft is 30 mm, the pitch L of the traversing units is determined by the following formula: ##EQU1##
On the other hand, a gap of about 25 mm is
REFERENCES:
patent: 4230284 (1980-10-01), Cunningham et al.
patent: 4300728 (1981-11-01), Andre et al.
patent: 4417700 (1983-11-01), Ueda et al.
patent: 4505437 (1985-03-01), Schippers et al.
patent: 4646983 (1987-03-01), Schippers et al.
patent: 4674694 (1987-06-01), Hasegawa et al.
patent: 4991783 (1991-02-01), Sugioka
patent: 5176330 (1993-01-01), Tone
patent: 5308004 (1994-05-01), Ukai et al.
Iwade Takashi
Migaki Yoshiro
Takagi Jun
Miller Austin R.
Stryjewski William
Toray Engineering Co., Ltd.
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