Apparatus for and a method of yarn doffing
AssigneeMurata Kikai Kabushiki Kaisha
InventorKenji Ohashi
Life of this patent
Estimating the term…
Abstract
Structure for doffing yarn in a yarn winding machine and by a method such that when a full package of yarn is formed at each winding unit of the yarn winding machine, a driving guiding drum for the winding unit is braked while an engaging shutter plate is moved to open a cradle arm to drop the full package on an inclined guide plate for transfer to a conveyor. An empty spool container on each winding unit then supplies an empty spool to the cradle arm by means of an empty spool carrier. The whole process is controlled by cam means actuated by a one-revolution clutch.
Claims6
A doffing apparatus of an automatic winding machine having a frame, a plurality of winding units each carrying a package, conveying means to transport a full package and guiding drum means contacting the periphery of the package to drive the same, said doffing apparatus comprising guide plate means for guiding a full package to the conveying means, brake means engageable with the guiding drum means to stop the guiding drum means, means mounting the brake means adjacent the guiding plate in a position to be contacted and actuated by the guiding plate on movement of the guiding plate, means for moving the guiding plate to contact and actuate the brake means while the guiding drum means are still engaging a full package, cradle means supporting the package in contact with the guiding drum means, shutter plate means for opening the cradle means to release a full package, yarn transfer means mounted on said guide plate for transferring the yarn end connected with a full package to one end of the package, cutter means to cut said yarn end transferred by said yarn transfer means, and empty spool carrier means for carrying an empty spool to said cradle means to be supported by the cradle means.
A doffing method for an automatic winding machine having a frame, a plurality of winding units each carrying a package including a spool and yarn wound on the spool and conveying means to transport a full package, comprising supporting a spool carried by cradle means until it is full of yarn while driving the package by contacting the periphery of the package with a guiding drum, moving a guide plate to actuate brake means to stop the guiding drum and the package on the spool becoming full, then swinging a shutter plate to open the cradle means to release the full package onto the guide plate, moving said released full package onto conveying means, and at the same time transferring yarn connected with the full package sidewise to yarn cutter means, carrying an empty spool to the cradle means and supporting the empty spool by the cradle means.
Dependencies are inferred from the claim text.