Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1984-02-16
1985-11-19
Taylor, Billy S.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
H01F 4108, B65H 8102, G11B 542, G11B 520
Patent
active
045537054
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a wire winder and has as its object winding wire on video heads and magnetic heads for computers, etc., such a head having a minute hole.
BACKGROUND ART
Heretofore, for winding wire through a hollow hole, a toroidal wire winder such as shown in FIG. 1 has been utilized. In such a toroidal wire winder, due to the need for a shuttle or spool to turn through the hollow hole of the object on which the wire is being wound, there is a lower limit for the size of the hollow hole; winding wire through a minute hole with a diameter smaller than 1 mm is impossible. Further, to solve such problems, various wire winding methods have been proposed. They include, for example, (1) pressure feeding the wire along a guide, utilizing a fluid, (2) carrying out magnetic control with a magnetic body attached on the tip of the wire, (3) the tip of the wire is put in the minute core hole and is sucked through by vacuum (Japanese Patent Publication No. 148812 of 1981) and (4) detecting the tip of the wire and making necessary correction for its position. In winding wire with diameter as small as 0.03 mm-0.05 mm on a toroidal core with the minimum hole diameter as small as about 0.25 mm.times.0.3 mm, the wire passing work poses a grave problem and especially, the reliability in repetitive wire winding or possibility of passing through the hole continuously more than once has been a serious problem. In the method of reinforcing the tip of the wire with a guide piece attached thereon, as used in magnetic control, not only is a separate process required, but there is a lower limit for the size of hole. On the other hand, passing the wire without an attachment on its tip is advantageous in many ways for automation. Reliability in wire passing could not heretofore be ensured because of such difficulties as bending or damage of the wire tip or variation of the length, etc. For these reasons, the wire winding work involving passing it through a hole, as abovedescribed, is considered difficult to automate and is presently done manually, utilizing simple jigs and tools or without using them, although various methods have been proposed.
DISCLOSURE OF THE INVENTION
This invention is characterized in that, in the wire winding method in which for winding wire on a toroidal core having a hollow hole, one end of the wire is inserted through the toroidal core from one side thereof, the wire protruding from this toroidal core is drawn out, the drawn out wire is wound thereabout, then the tip of the wire is again inserted through the toroidal core, with a tension applied, and this operation is repeated, the tip of the wire held by a gripping means is cut before the end of the wire is inserted through the toroidal core; so that the length from the position where the wire is held to its tip is the predetermined value, when inserting the tip of the wire through the core, whereby repetitive positive wire winding while always holding the the tip of wire steady is made possible.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a prior art perspective view of a toroidal wire winder intended for winding wire through a hollow hole;
FIG. 2(a) is a plan view of a toroidal core on which wire is to be wound;
FIG. 2(b) is a side view of the same;
FIG. 3 is a perspective view of a wire winding device embodying this invention;
FIG. 4 is a perspective view on an enlarged scale of the wire winding mechanism of this wire winding device;
FIG. 5 is a sectional view of the cutting means of this wire winding;
FIG. 6 is a schematic perspective view of the tension applying means of this wire winding device;
FIG. 7 is a front view of a wire feeding means of this wire winding device;
FIG. 8 is an explanatory diagram showing the wire winding operation being continuously performed in this wire winding device;
FIG. 9 is an enlarged perspective view of this wire winding device, as seen when passing wire through the core; and
FIG. 10 is an explanatory diagram showing the relative cutting position of parts of this wire winding
REFERENCES:
patent: 4269366 (1981-05-01), Lindenmeyer
patent: 4424939 (1984-01-01), Ohashi et al.
patent: 4467972 (1984-08-01), Kaiser
Uchida Yoshihisa
Yamashita Kazuichi
Matsushita Electric - Industrial Co., Ltd.
Taylor Billy S.
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