Core yarn, and method and device for manufacturing the same

Abstract

Automation of a manufacturing device for a core yarn that an elastic yarn that is a core fiber becomes high stretchy, the yarn strength of the core yarn as a single yarn is high and a fiber comprising a fiber bundle is wrapped around the elastic yarn that is the core fiber. Regarding a core yarn 12 that the fiber bundle made from the cotton 100% covers an elastic yarn 11 used as the core fiber, the elastic yarn 11 used as the core fiber is drafted in more than 4 times of the drafting magnification between an elastic yarn supply device 10 and a yarn delivering device 14 disposed in the downstream side of a spinning device 13 for implementing air spinning by the vortex air current and having an air spinning nozzle 86 for generating the vortex air current and a hollow guide shaft 80 and a fiber bundle 5 covers the core fiber by centralizing the elastic yarn 11.

1 . A core yarn that a fiber bundle made from a short fiber covers an elastic yarn used as a core fiber, wherein the power necessary for breaking the fiber bundle in slipping the fiber bundle on the elastic yarn when pulling to the longitudinal direction is stronger than the power necessary for breaking the whole yarn when pulling to the longitudinal direction.  
     
     
         2 . A core yarn that a fiber bundle made from a short fiber covers an elastic yarn used as a core fiber, wherein the fiber bundle covers the core fiber made by centralizing the elastic yarn and the fascinated part that a part of the fiber bundle is wrapped around the elastic yarn is provided in the covering of the fiber bundle around the elastic yarn.  
     
     
         3 . A core yarn that a fiber bundle made from a short fiber covers an elastic yarn used as a core fiber, wherein the elastic yarn used as a core fiber is drafted in more than 4 times of the drafting magnification between an elastic yarn supply device and a yarn delivering device disposed in the downstream side of a spinning device which is equipped with an air spinning nozzle for generating the vortex air spinning and a hollow guide shaft for implementing air spinning by the vortex air current and the fiber bundle covers the core fiber made by centralizing the elastic yarn.  
     
     
         4 . A core yarn that a fiber bundle made from a short fiber covers an elastic yarn used as a core fiber, wherein the elastic yarn is disposed in the central part and is parallel to the longitudinal direction, it is composed that one end side is located in the central part of the core yarn with heading in almost parallel to the longitudinal direction and the other end is exposed in the outer surface of the core yarn spirally in each fiber comprising the fiber bundle for covering and the fiber bundle for covering has the consecutive structure that the other end side of the respective fibers is wrapped around the trailing other fiber and the other end side of the other fiber is also wrapped around the other trailing fiber.  
     
     
         5 . A core yarn manufacturing method characterized in that, providing an elastic yarn supply device and a spinning device for implementing air spinning by the vortex air current equipped with an air spinning nozzle for generating the vortex air current and a hollow guide shaft, the elastic fiber used as the core fiber is drafted in more than 4 times of the drafting magnification between the elastic yarn supply device and a yarn delivering device disposed in the downstream side of the spinning device, and the elastic fiber and the fiber bundle are supplied to the hollow guide shaft by the spinning device with drafting and the fiber made from the short fiber comprising the fiber bundle covers the elastic yarn.  
     
     
         6 . A core yarn manufacturing device, comprising: 
 a drafting unit for drafting a fiber bundle;    an elastic yarn supply device for supplying an elastic yarn used as a core fiber to the fiber bundle;    an air spinning device for producing a core yarn by introducing the elastic yarn and the fiber bundle and activating the vortex air current on it;    a yarn delivering device disposed in the downstream side of the air spinning device;    a winding unit for winding the core yarn discharged from the yarn delivering device; and    a yarn piecing device for piecing the core yarn in the spinning side and the core yarn in the winding side,    wherein an extruding device for introducing yarn discharged from the air spinning device to the yarn piecing device by extruding it, a detecting device for detecting the yarn presence in the extruding device and a control unit for controlling the supply of the elastic yarn by the elastic yarn supply device based on the result of the detecting device are provided.    
     
     
         7 . A core yarn manufacturing device, comprising: 
 a drafting unit for drafting a fiber bundle;    an elastic yarn supply device for supplying an elastic yarn used as a core fiber to the fiber bundle;    an air spinning device for producing a core yarn by introducing the elastic yarn and the fiber bundle and activating the vortex air current on it;    a yarn delivering device disposed in the downstream side of the air spinning device;    a winding unit for winding the core yarn discharged from the yarn delivering device; and    a yarn piecing device for piecing the core yarn in the piecing side and the core yarn in the winding side,    wherein an extruding device for introducing the yarn discharged from the air spinning device to the yarn piecing device by extruding it, a detecting device for detecting that the delivering power by the yarn delivering device is applied to the yarn extruded by the extruding device and a control unit for controlling the supply of the elastic yarn by the elastic yarn supply device based on the result of the detecting device are provided.    
     
     
         8 . A core yarn manufacturing device as claimed in  claim 6  or  claim 7 , wherein the extruding device is a movable suction tube and the detecting device detects the yarn presence in the suction path of the suction tube.  
     
     
         9 . A core yarn manufacturing device as claimed in any one of  claim 6  to  claim 8 , wherein the elastic yarn supply device has an air sucker device and a clamp cutter device, and the control unit controls to release the clamp of the elastic yarn by the clamp cutter device after the predetermined time since the air sucker device is operated in starting to supply the elastic yarn.  
     
     
         10 . A core yarn manufacturing device as claimed in  claim 9 , wherein the elastic yarn supply device has a supply roller which is rotated in contact with a yarn feeding package of the elastic yarn and the control unit controls to start to supply the elastic yarn by the supply roller and to release the clamp of the elastic yarn by the clamp cutter at almost the same time when starting to supply the elastic yarn.  
     
     
         11 . A core yarn manufacturing device as claimed in any one of  claim 6  to  claim 10 , wherein the air spinning device has a hollow guide shaft and a nozzle member for generating the vortex air current in the tip part of the hollow guide shaft, and the core yarn is produced by activating the vortex air current using the nozzle with supplying the elastic yarn and the fiber bundle from the tip side to the yarn path of the guide shaft.