Method and apparatus for replacing bobbins on spinning or twisting machines

Claim 3

A method of doffing full packaged bobbins and donning fresh bobbins according to claim 1, which comprises the following steps: stopping the spinning operation when each yarn package reaches a predetermined full size; displacing said horizontal holding bar from a waiting position to a horizontal position above said conveying means; gripping said fresh bobbins, perpendicularly arranged in a row at an intervened space equal to said spindle pitch upon said conveying means, by said bobbin gripping members respectively; displacing said holding bar to said waiting station adjacently below said spindle rail; releasing gripping action of said bobbin gripping members so as to transfer said fresh bobbins upon said waiting station; displacing said holding bar to a horizontal position above said spindle rail; gripping the full packaged bobbins mounted to said spindles by said bobbin gripping members respectively; next, after displacing said holding bar upward for doffing of said full packaged bobbins from corresponding spindles, displacing said holding bar downward to said horizontal position above said conveying means; releasing gripping action of said bobbin gripping members so as to transfer said full packaged bobbins from said bobbin gripping members to said conveying means; displacing said holding bar to said horizontal position above said waiting position and then actuating said bobbin gripping members for gripping said fresh bobbins reserved on said waiting station; next, displacing said holding bar to said horizontal position above said spindle rail so that said fresh bobbins are mounted on the respective spindles; releasing gripping action of said bobbin gripping members; next displacing said holding bar to said waiting position; commencing spinning operation; carrying said full packaged bobbins to the outside of said spinning or twisting machine by said conveying means while supplying said fresh bobbins to a reserving position; controlling said steps of operation sequentially according to a predetermined program.

Claim 4

A method of doffing full packaged bobbins and donning fresh bobbins according to claim 1, which comprises the following steps: stopping the spinning operation when each yarn package reaches a predetermined full size; displacing said horizontal holding bar from a waiting position to a horizontal position above said spindle rail and displacing downward; gripping the full packaged bobbins of said spindles by said bobbin gripping members respectively; next, after displacing said holding bar upward for taking off said full packaged bobbins from corresponding spindles, displacing said holding bar downward to said waiting station; releasing gripping action of said bobbin gripping members so as to transfer at an intervened space equal to said spindle pitch upon said waiting station; displacing said horizontal holding bar to a horizontal position above said convying means and displacing downward; gripping said fresh bobbins, reserved upon said conveying means, by said bobbin gripping means respectively; displacing said holding bar to a horizontal position above said spindle rail, and releasing said gripping membeRs so that fresh bobbins are mounted on corresponding spindles respectively; displacing said holding bar to a horizontal position adjacently above said waiting station and displacing downward and then actuating said gripping members for gripping said full packaged bobbins; next, displacing said holding bar upward and then displacing to a horizontal position above said conveying means, next releasing said gripping members so that said full packaged bobbins are transferred to corresponding positions of said conveying means where fresh bobbins were reserved; next, displacing said holding bar to said waiting position; commencing spinning operation; carrying said full packaged bobbins to the outside of said spinning or twisting machine by said conveying means while supplying said fresh bobbins to said reserving position; controlling said steps of sequential operations according to a predetermined program.

Claim 5

An automatic apparatus for simultaneously doffing full packaged bobbins from spindles and then simultaneously donning fresh bobbins upon said spindles of a spinning or twisting machine comprising: means for conveying said fresh bobbins from outside of said machine and conveying said full packaged bobbins to the outside of said machine, said conveying means having a plurality of pegs arranged in a row at an intervened distance equal to the spindle pitch for supporting said bobbins and extending parallel to the spindle rail, a plurality of gripping members for gripping said full packaged bobbins or fresh bobbins, a horizontal holding bar for holding said bobbin gripping members in a row at an intervened distance equal to said spindle pitch, a horizontal platform disposed at an adjacent position to said spindle rail, said platform being capable of supporting either one of said full packaged bobbins or fresh bobbins, means for displacing said holding bar between the following positions in a predetermined sequential order, a horizontal position for resting said holding bar during the spinning operation, a position for carrying out said doffing and donning operation, a position for taking up said fresh bobbins from said conveying means and transferring said full packaged bobbins to said conveying means, a position for transferring either one of the said full packaged bobbins or fresh bobbins from said gripping members upon said platform and for taking said full packaged bobbins or fresh bobbins from said platform by said gripping members at a separate step during sequential operations of said doffing and donning operations, means for controlling said motions of said holding bar, and means for actuating said bobbin gripping members according to a predetermined program.

Claim 6

An automatic apparatus for simultaneously doffing full packaged bobbins from spindles and then simultaneously donning fresh bobbins upon said spindles of a spinning or twisting machine comprising: means for conveying said fresh bobbins from outside of said machine and conveying said full packaged bobbins to the outside of said machine, said conveying means having a plurality of pegs arranged in a row at an intervened distance equal to the spindle pitch for supporting said bobbins and extending parallel to the spindle rail, a plurality of gripping members for gripping said full packaged bobbins or fresh bobbins, a horizontal holding bar for holding said bobbin gripping members in a row at an intervened distance equal to said spindle pitch, a horizontal platform disposed at an adjacent position to said spindle rail, said platform being capable of supporting either one of said full packaged bobbins or fresh bobbins, means for displacing said holding bar between the following positions in a predetermined sequential order, a horizontal position for resting said holding bar during the spinning operation, a position for carrying out said doffing and donning operation, a position for taking up said fresh bobbins from said conveying means and transferring said full packaged bobbins to said conveying means, a position for transferring either one of the said full packaged bobbins or fresh bobbins from said gripping members upon said platform and for taking said full packaged bobbins or fresh bobbins from said platform by said gripping members at a separate step during sequential operations of said doffing and donning operations, means for controlling said motions of said holding bar, and means for actuating said bobbin gripping members according to a predetermined program.

Claim 7

An automatic doffing and donning apparatus according to claim 4, wherein, said horizontal holding bar extends along the spindle arrangement of said machine; said displacing means comprises a horizontal screw bar turnably disposed at a horizontal position adjacent to the front bottom of said machine and is provided with several pairs of screw segment portions, each pair of screw segment portions is provided with two thread portions having opposite thread directions; several pairs of guide members mounted on the respective segments; several pairs of connecting rods pivotally connecting both end portions of each connecting rod to said horizontal bar and corresponding guide members; means for approaching or withdrawing said holding bar to and from said spindle rail; driving means for turning said screw rod; said approaching or withdrawing means and said driving means are controlled by said control means.

Claim 8

An automatic doffing and donning apparatus according to claim 5, wherein said approaching and withdrawing means comprises a plurality of bracket turnably mounted on said screw rod, each bracket rigidly connected to said guide member; a horizontal rod extended below said screw rod passing through a portion of each bracket; a plurality of actuating rods transversely disposed below said spindle arrangement and said screw bar, the free end of said actuating rod is pivoted to said horizontal rod, an actuating means for telescopically extending or retracting said free end, said actuating means disposed below said machine and connected to the other end of said actuating rod; said motion of actuating means is controlled by said control means.