Yarn end finding apparatus
AssigneeMurata Kikai Kabushiki Kaisha
InventorsIsamu Matsui, Hiroshi Uchida, Noboru Sekitani, Hirokazu Okumura
Life of this patent
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Abstract
A yarn end finding apparatus having a vertically movable hollow member which can be raised to allow positioning of a bobbin thereunder and then lowered onto the bobbin. The hollow member includes a device for releasing the end of the yarn from the bobbin. A vertical flow of air through the hollow member directs the released yarn away from the bobbin past a yarn clamping device and a blade which cuts the yarn at a predetermined distance from the clamping device. A reverse flow of air directs the remaining length of yarn into the hollow bobbin core for subsequent processing.
Claims14
A yarn end finding apparatus useable with a spinning bobbin which is located at a fixed position, the bobbin being of the type which comprises a take-up tube erected at one end thereof on a carrier and having yarn wound around the take-up tube, wherein the yarn windings nearest the other end of said tube form a top bunch, the apparatus comprising:
- a member mounted for vertical movement along the axial direction of the take-up tube toward and away from the spinning bobbin, the vertically movable member having mounted thereon:
- a releasing means for releasing the top bunch, containing the yarn end, from the spinning bobbin;
- a suction means for sucking the yarn end thus released vertically away from the bobbin;
- a clamping means, disposed above said releasing means, for clamping the yarn which is sucked away from the bobbin;
- a cutting means, above said clamping means, for cutting the yarn, which is sucked away from the spinning bobbin, at a predetermined position;
- and
- a suction pipe having a first opening located below the carrier at said fixed position for inserting the yarn end thus cut into the take-up tube of the spinning bobbin.
In a yarn end finding apparatus for use in a spinning bobbin supply system of the type that uses bobbins having a take-up tube and yarn wound around the take-up tube, said apparatus including inserting means for inserting the end of the yarn into the hollow center of the take-up tube, the improvement for providing a compact apparatus, comprising:
- a hollow member having a first and second opening at opposite ends thereof, said first opening being adapted to receive said bobbin;
- means for inserting said bobbin into said hollow member through said first opening so that most of the yarn windings are within said hollow member;
- pump means disposed at said second opening for pumping a flow of fluid through the hollow member so that, when said bobbin is inserted in to said hollow member, the fluid flows around the outside of the bobbin along the axial direction of the take-up tube, said flow being directed along most of the length of said bobbin and being sufficiently powerful to draw the end of the yarn away from the bobbin;
- a clamp, disposed within said hollow member for clamping the yarn caught in the fluid flow, to thereby prevent excessive unwinding of the yarn, said clamp being disposed at a distance from the bobbin along the axis of the take-up tube in the direction of the flow;
- and
- a blade, disposed within said hollow member on the side of the clamp opposite said first opening, for cutting the yarn caught in the fluid flow at a predetermined distance from the clamp.
In a yarn end finding apparatus of the type usable in a spinning bobbin supply system wherein bobbins having a take-up tube and yarn wound around the take-up tube are transported to a plurality of yarn processing stations, each station being positioned at a different location, the apparatus including a first flow means for directing a first flow of fluid over the yarn to draw the yarn away from the bobbin, a cutting means for cutting the yarn in said first flow at a predetermined distance from the bobbin and a second flow means for directing a second flow of fluid into the hollow core of the take-up tube to draw the end of the remaining length of yarn into the core, the improvement for providing a compact aparatus, comprising:
- the colinear arrangement along the axis of said take-up tube, at a single station, of said first flow means, said cutting means and said second flow means, wherein the first flow means is disposed so that said first flow is directed over the yarn windings along the axial direction of the take-up tube, the cutting means is disposed at a predetermined distance from the bobbin in the direction of the first flow and said second flow means is disposed on the opposite side of the bobbin from the cutting means so that the second flow is directed though the hollow core of the take-up tube in the opposite direction from the first flow.
Dependencies are inferred from the claim text.