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(11) | EP 2 017 212 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Yarn winding apparatus |
| (57) A yarn winding apparatus according to the present invention quickly and accurately
detects that an abnormal winding state such as straight winding is occurring on a
winding package. A yarn winding unit 2 winds a yarn 4 unwound from a supplying bobbin
3 around a winding tube 6 while traversing the yarn 4 using a traverse device 5, to
form a full package 7. A winding state detecting section 52 compares an actual diameter
measured by a package diameter sensor 44 with a predicted diameter calculated by a
package diameter predicting section 51 to detect the winding state of the winding
package 7. The predicted diameter is calculated in accordance with a reference diameter
that is the diameter of the winding package 7 measured by the package diameter sensor
44 before the winding state detecting section 52 detects the winding state. At the
time of the start of winding, the reference diameter is updated to the actual diameter
measured by the package diameter sensor 44.
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