Textiles: spinning – twisting – and twining – Apparatus and processes – Package handling
Patent
1990-07-11
1993-01-05
Hall, III, Joseph J.
Textiles: spinning, twisting, and twining
Apparatus and processes
Package handling
57 90, 242 355A, D01H 918
Patent
active
051759900
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a spinning machine, in particular a ring spinning machine or ring frame. More particularly, this invention relates to the bobbin conveying system for a spinning machine.
In a known ring spinning machine of this type (GB-PS 1,168,638) the bobbin pegs are mounted directly on the endless conveyor constructed as horizontal conveyor belt. The endless conveyor is generally constructed as a steel band or belt which distorts as little as possible so that the predetermined intervals of the bobbin pegs, which must coincide exactly with the intervals of the spinning points or stations, remain unchanged even on relatively long operation of the machine.
Whereas in the ring spinning machine according to GB-PS 1,168,638 the bobbin pegs are arranged at half the interval of the spinning stations or points in order to be able to receive during doffing temporarily simultaneously an empty bobbin and a full bobbin (cops) of the associated spinning point, it is also possible to provide on the endless conveyor constructed as belt or band, bobbin pegs only at the interval of the spinning points, in which case at each spinning point an additional peg must then be provided in order to receive temporarily one of the bobbins to be replaced on a bobbin change (U.S. Pat. No. 3,905,184).
It is further already known (EP-A-O 061 432) to provide on each machine side of a ring spinning machine or frame an endless conveyor, both runs of each endless conveyor being equipped with bobbin pegs so that when changing a full bobbin (cops) for an empty bobbin, the full bobbin can be fitted onto the empty bobbin peg whilst thereafter an empty bobbin is removed from the bobbin peg of the other run associated with the same spinning point and fitted onto the spindle of the spinning point. In this known ring spinning machine, as well, the bobbin pegs are connected via angle pieces directly to the endless conveyor.
It is also already known (JP-OS 57-161 134) to use the peg trays employed in the spooling frame following the ring spinning machine also as empty bobbin supply means or full bobbin removal means by displacing the peg trays, which generally consist of a circular disc and a center peg arranged perpendicularly thereon, in a guide rail extending round the ring spinning machine, the diameter, in particular the length of a peg tray, being slightly smaller than the spacing of two adjacent spinning points. The individual peg trays are in contact with each other and are advanced by exerting a force on one or more peg trays, the thrust being at least partially transmitted by the direct contact of the peg trays. A conveying apparatus for such peg trays is also known from DE-OS 3,544,560.
A disadvantage in the ring spinning machine according to JP-OS 57-161 134 is that the bobbin pegs are not exactly in alignment with the spinning points when a group of peg trays with empty bobbins has been pushed on one machine side in front of the associated spinning points. Consequently, before the bobbin change can be performed in the known ring spinning machine, a rake must be pushed at right-angles to the spinning machine longitudinal axis between the peg trays so that the intervals of the adjacent bobbin pegs are exactly coordinated with the intervals of the adjacent spinning stations.
In a similar bobbin transport means (DE-OS 3,712,027) a reciprocating rail or the like extending along the spinning points is used and cooperates with peg trays displaceable in a guide rail in such a manner that the trays are displaced stepwise up to the associated spinning point. To ensure that the peg trays are exactly aligned with the associated spinning point they must either have a length exactly equal to the spinning point spacing or blocking elements pivotal in pawl-like manner must be provided on the reciprocating rail and disposed exactly at the intervals of the spinning points so that the blocking elements ensure an exact alignment of the peg trays with the associated spinning point even when the holding trays are not in contact with each other. Howe
REFERENCES:
patent: 3382659 (1968-05-01), Schultz et al.
patent: 3905184 (1975-09-01), Takai et al.
patent: 3935821 (1976-02-01), Maier et al.
patent: 4841720 (1989-06-01), Kawasaki et al.
patent: 4964269 (1990-10-01), Dinkelman
Fritschi Isidor
Meyer Urs
Wernli Jorg
Hall, III Joseph J.
Hand Francis C.
Rieter Machine Works Ltd.
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