Title:
CORELESS COIL AND PRODUCING METHOD THEREOF
Document Type and Number:
Japanese Patent JP3824929
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a coreless coil and producing method thereof capable of preventing occurrence of wire irregularity and wire kink and capable of continuously and smoothly taking out a wire A until the wire A is all taken out during the usage of the coreless coil, and capable of improving the rate of operation of wire processing equipment in a post-process.
SOLUTION: The wire A is wound in a shape of a coil so that a coil winding layer body 10 having a taper hole 10a in the center is formed, and the wire A can be taken out through the taper hole 10a from an inner side of the coil winding layer body 10. The residual curvature obtained when the residual strain of one round winding loop of the wire A in an optional layer of the coil winding layer body 10 is released is larger than the winding curvature obtained when the wire A is wound in the shape of the coil.
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Inventors:
Hirokazu Suzuki
Yukio Saisu
Yasuo Akuta
Umeki Toru
Yukio Saisu
Yasuo Akuta
Umeki Toru
Application Number:
JP2001392853A
Publication Date:
September 20, 2006
Filing Date:
December 25, 2001
Export Citation:
Assignee:
THE FURUKAW ELECTRIC CO.,LTD.
International Classes:
B65H55/00; B65H57/00; B21C47/00; B21C47/02; B21C47/12; B65H55/04; (IPC1-7): B65H55/00; B21C47/00; B21C47/02; B21C47/12
Domestic Patent References:
| JP2000327223A | ||||
| JP5309415A | ||||
| JP58071051U | ||||
| JP5325821B2 | ||||
| JP5337582A | ||||
| JP6239867Y2 | ||||
| JP2962099B2 | ||||
| JP639466A | ||||
| JP61269945A |
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