Single-sided ring spinning frame with sliver accommodating cans, and method for supplying slivers to such frame

Abstract

A single-sided ring spinning frame having spinning positions including draft parts and winding parts on a front side of the machine frame, and rows of cans arranged on a rear side of the machine frame. Each can has a plurality of sliver accommodating areas to accommodate a plurality of rows of sliver coils therein. Sliver guides are arranged above the cans. Therefore, the number of the cans is less than the number of spinning positions, and the height of the cans is selected so that an operator can easily handle the sliver in the can. Also, a method for supplying slivers to a single-sided ring spinning frame, and a sliver transfer device used in the method are also disclosed.

1 . A single-sided ring spinning frame comprising: 
 a machine frame;    a plurality of spinning positions each including a draft part and a winding part arranged on a front side of the machine frame;    a plurality of cans arranged in two, front and rear, rows on a rear side of the machine frame for supplying slivers to the draft parts of the spinning positions, said cans being arranged so that each can can accommodate a plurality of rows of sliver coils; and    sliver guides arranged at a position above the cans for guiding the slivers from the cans to the draft parts.    
     
     
         2 . A single-sided ring spinning frame as defined by    claim 1   , wherein the sliver guides comprise front side guides located at a position higher than the drafts part and rear side guides located at a position lower than the front side guides.  
     
     
         3 . A single-sided ring spinning frame as defined by    claim 1   , wherein the sliver guides comprise front side guides movable between a first position higher than the draft part and a second position lower than the first position and on the rear side of the first position, and rear side guides located at a position on the rear side of the front side guides.  
     
     
         4 . A single-sided ring spinning frame as defined by    claim 1   , wherein the sliver guides comprise front side guides and rear side guides located on the rear side of the front side guides, and wherein the rear side guides are provided at a position above a boundary between the front and rear rows of cans, and the slivers in the front and rear rows of cans are guided to the front side guides via the rear side guides.  
     
     
         5 . A single-sided ring spinning frame as defined by    claim 1   , wherein the can has a trunk portion and a vertically movable support plate in the trunk portion for supporting the slivers.  
     
     
         6 . A single-sided ring spinning frame as defined by    claim 5   , wherein the support plate is arranged over a plurality of sliver accomodating areas for accommodating a plurality of rows of sliver coils.  
     
     
         7 . A single-sided ring spinning frame as defined by    claim 6   , wherein the profile of the trunk portion of the can is so formed that the sliver accommodating areas are elongated in a direction along which sliver coils are arranged.  
     
     
         8 . A single-sided ring spinning frame as defined by    claim 1   , wherein the sliver guide comprises a guide roller for diverting a running direction of the sliver.  
     
     
         9 . A single-sided ring spinning frame as defined by    claim 1   , wherein the cans are disposed on the rear side of the machine frame above a floor on which the spinning frame is installed.  
     
     
         10 . A single-sided ring spinning frame as defined by    claim 8   , wherein a can platform is provided on the rear side of the machine frame above a floor to define a space between the can platform and the floor for allowing cleaning air to pass therethrough, and the cans are placed on the can platform.  
     
     
         11 . A single-sided ring spinning frame as defined by    claim 1    wherein the can has a trunk portion with at least one pair of opposite projections so that the projections define end portions of a boundary between the adjacent sliver accommodating areas for rows of sliver coils.  
     
     
         12 . A single-sided ring spinning frame as defined by    claim 11   , wherein the projections are formed integral with the trunk portion.  
     
     
         13 . A single-sided ring spinning frame as defined by    claim 5    wherein the can has an open bottom allowing a spring biasing the support plate upward to pass therethrough.  
     
     
         14 . A single-sided ring spinning frame as defined by    claim 5   , wherein the trunk portion and the support plate are formed of a resin material.  
     
     
         15 . A single-sided ring spinning frame as defined by    claim 1   , further comprising a peg conveyor rail for discharging full bobbins and for arranging empty bobbins, and a peg conveyor rail for supplying empty bobbins.  
     
     
         16 . A method for supplying slivers to a single-sided ring spinning frame comprising a machine frame, a plurality of spinning positions each including a draft part and a winding part arranged on a front side of the machine frame, and a plurality of cans disposed on a rear side of the machine frame for supplying slivers to the draft parts of the spinning positions, said method comprising the steps of: 
 taking out a sliver from a finishing drawing frame can in which the sliver is accommodated in a leading hook position and accommodating the sliver in a further can without drafting the sliver; and    supplying the sliver accommodated in said further can in a trailing hook position.    
     
     
         17 . A method for supplying slivers to a single-sided ring spinning frame comprising a machine frame, a plurality of spinning positions each including a draft part and a winding part arranged on a front side of the machine frame, and a plurality of cans disposed on a rear side of the machine frame for supplying slivers to the draft parts of the spinning positions, said method comprises the steps of; 
 accommodating a sliver produced by a card in a card can;    drafting the sliver taken out from the card can by a first drawing frame and accommodating the sliver in a first drawing frame can;    drafting the sliver taken out from the first drawing frame can by a second drawing frame and accommodating the sliver in a second drawing frame can;    taking out the sliver thus accommodated in the second drawing frame can in a leading hook position and accommodating the sliver in a further can without drafting the sliver; and    supplying the sliver accommodated in said further can to the draft part.    
     
     
         18 . A sliver transfer device used in a method for supplying slivers to a single-sided ring spinning frame, for taking out a sliver from a finishing drawing frame can in which the sliver is accommodated in a leading hook position, and accommodating the sliver in a can having oblong sliver accommodating areas arranged in a side-by-side manner without drafting the sliver, said sliver transfer device comprising: 
 a can carriage for placing the can thereon so that the can can move in the lengthwise direction of the oblong sliver accommodating areas;    rotatable coiler disks with coiler tubes for guiding the slivers, respectively, provided above the respective sliver accommodating areas of the can placed on the can carriage;    taker-in rollers for introducing the slivers into the coiler tubes, respectively; and    positioning members provided in the can carriage to project from and retract into an top surface of the can carriage for engagement with a pair of positioning engagement portions in the can to position the can in the longitudinal direction and the transverse direction.