JPH06318528A - Method of folding back coil winding and coil structure - Google Patents

Abstract

PURPOSE:To automate winding of a coil using an automatic coil winding device by fusion welding an end of a fusion-weldable wire regarding a method of folding back the winding of the coil, where the first layer of the coil is formed by winding the fusion-weldable wire on a coil bobbin, the end of this wire is folded back and the second layer of the coil is wound continuously. CONSTITUTION:On the outer surface 1a of a cylindrical coil bobbin 1, the first and second layers 4, 5 of fusion-weldable wire 3 are folded back through a fusion welding part 20 and are wound and the coil 6 is formed. The end 4a of the winding of the first layer of the coil 4 is wound inwardly by an angle thetaand fixed through the fusion welding part 20 formed by fusion-welding the fusion weldable wires 3 by application of heat, lights and a solvent. The fixed end 4a is folded back in the original direction and forming the second layer of the coil 5, a two-layer coil is formed. Therefore, repeating this method on both ends, a multilayer coil is easily formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding method and a winding structure, and more particularly, to a method of forming a second layer winding after the end of a first-layer fused electric wire is fused and fixed. For new improvements to do.

[0002]

2. Description of the Related Art There are various winding structures of this type that have been conventionally used. Among them, typical structures are shown in FIGS. 9, 10 and 11. . That is, the reference numeral 1 in the structure of FIG. 9 is a cylindrical wound body, and the outer periphery 1a of the wound body 1 is provided with an end plate 2 as a mechanical stopper, and A winding 6 is formed by winding the first layer winding 4 and the second layer winding 5 of the electric wire 3 around the outer periphery 1a using the end plate 2 as a guide.

Further, in the structure shown in FIG. 10, a tape 2A is provided instead of the end plate 2.

Further, in the structure shown in FIG. 11, a non-wound portion 10 in which the second layer winding 5 is not wound is formed from the end 4a of the first layer winding 4 toward the inside, and the non-wound portion 10 is formed. 2 after 10
The layer winding 5 was wound.

[0005]

Since the conventional winding structure is constructed as described above, there are the following problems. That is, in the structures of FIGS. 9 and 10, since the end plate and the tape are used, it is extremely difficult to use the automatic winding machine, and automation is extremely difficult. Further, in the case of FIG. 11, since the non-wound portion of the second layer winding has to be formed at the end of the first layer winding, the windings for the differential transformer are the first layer winding and the second layer winding. The boundary between the windings was not clear, and there was a problem with accuracy due to the detection characteristics of the differential transformer.

The present invention has been made to solve the above problems, and in particular, the ends of the fused electric wire of the first layer are fused and fixed and then folded back to form the second layer. An object of the present invention is to provide a winding method and a winding structure for such winding.

[0007]

A winding winding method according to the present invention forms a first layer winding by winding a fused electric wire around an outer periphery of a body to be wound, and folds the end of the first layer winding. In the method of folding back the winding so that the second layer winding is continuously wound, heat, light or a solvent is applied to the fused electric wire at the end to fuse the fused electric wire. .

In the winding structure according to the present invention, the fused electric wire is wound around the outer periphery of the body to be wound to form the first layer winding, and the end of the first layer winding is folded back to continue the second layer winding. In the winding structure wound by winding, a fusion-bonded portion in which fusion-bonded electric wires are fused is provided at the end.

More specifically, the fused electric wire at the end is bent inward.

[0010]

In the winding method and winding structure according to the present invention, the fused electric wires at the end of the first layer winding are fused and fixed by any of light, heat or solvent and bent inward. Therefore, the folding can be performed without using the conventional means such as an end plate, and the folding portion can wind the second layer winding only with the smallest non-winding portion. it can.
Further, it is suitable for automatic winding, and enables mass production by an automatic winding machine.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a winding method and winding structure according to the present invention will be described in detail below with reference to the drawings. In addition, the same or equivalent portions as those of the conventional example will be described using the same reference numerals. 1 to 8 are for illustrating a winding winding method according to the present invention.

A reference numeral 1 in FIG. 1 denotes a cylindrical wound body, and the outer circumference 1a of this wound body 1 has a first layer winding 4 and a second layer winding 5 formed by a fusion electric wire 3. Is the fused portion 20
A winding 6 is formed by being folded back and wound.

The end 4a of the first layer winding 4 is, as shown in FIGS. 2 to 5, stopped by winding the end 4a in the state shown in FIG. 3, bent back inward by an angle θ, and returned. In the state of FIG. 4, heat, light, or a solvent is added to fix the fused electric wires 3 via the fused portion 20 formed by fusion.

The fixed terminal end 4a is folded back in the original direction from the state shown in FIG. 5 to form a second layer winding 5 to form a double winding. Therefore, the multi-layer winding can be easily formed by repeating the above method in both directions. 7 and 8 are enlarged views of FIGS. The fusion-bonded electric wire is formed by aligned winding.

[0015]

As described above, since the winding method and winding structure of the present invention are constructed as described above, the following effects can be obtained. That is, by using a fusion-bonded electric wire, the end of the first layer winding is fused and fixed, and folded back to form the second layer winding, which does not require the conventional means such as an end plate, It is extremely easy to perform automatic winding with an automatic winding machine. Further, it is possible to realize a large reduction in price of the winding structure by mass production.

[Brief description of drawings]

1 is a partial cross-sectional view of a winding structure according to the present invention.

FIG. 2 is a configuration diagram showing a winding start.

FIG. 3 is a configuration diagram showing a folded state.

FIG. 4 is a configuration diagram showing a folded state.

FIG. 5 is a configuration diagram showing a folded state.

FIG. 6 is a configuration diagram showing a double winding state.

FIG. 7 is an enlarged view of FIG.

FIG. 8 is an enlarged view of FIG.

FIG. 9 is a partial cross-sectional view of a conventional winding structure.

FIG. 10 is a partial cross-sectional view of a conventional winding structure.

FIG. 11 is a partial cross-sectional view of a conventional winding structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Winding object 1a Outer periphery 3 Fusion electric wire 4 1st layer winding 4a Termination 5 2nd layer winding 20 Fusion part

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Shojiro Omuro 1200, Higashi Tanaka, Komaki City, Aichi Prefecture Mitsubishi Heavy Industries, Ltd.Nagoya guidance propulsion system manufacturing plant (72) Hideo Aoki 1200, Higashi Tanaka, Komaki City, Aichi Prefecture Mitsubishi Heavy Industry Co., Ltd. Nagoya guidance propulsion system manufacturing plant

Claims (3)

[Claims] 1. A first-layer winding (4) is formed by winding a fusion electric wire (3) around an outer circumference (1a) of a wound body (1), and a termination of the first-layer winding (4).
(4a) is folded back so that the second layer winding (5) is continuously wound. In the winding folding method, the fused electric wire (3) at the end (4a) is treated with any of heat, light and solvent. The above fused electric wire
A method for folding a winding, characterized in that (3) is fused. 2. A first layer winding (4) is formed by winding a fusion electric wire (3) around an outer periphery (1a) of a wound body (1), and a termination of the first layer winding (4).
In the winding structure in which the second layer winding (5) is continuously wound by folding back the (4a), the terminal end (4a) is a fused portion (20) obtained by fusing the fusion electric wire (3) with each other. A winding structure characterized by having. 3. The winding structure according to claim 2, wherein the fusion-bonded electric wire (3) at the terminal end (4a) has a structure bent inward.