JPS61124250A - Fusion-bonding method of coil for flat armature - Google Patents

Abstract

PURPOSE:To uniformly and rapidly fusion-bond by suppressing a coil by a metal jig, inserting into a high frequency induction coil, and heating by an eddy current generated at the jig to fusion-bond a coil lead. CONSTITUTION:A plurality of flat unit coils 6 or the unit coils are laminated to form a flat armature, which is shaped in a shape to be fastened, suppressed by metal jigs 11, 12, and temporarily secured. The jigs are inserted into a high frequency induction coil 17, which is energized. The jigs 11, 12 are heated by an eddy current generated at the jigs 11, 12, thereby integrally fusion-bonding the fusion-bondable insulating coating of the coil 6 by the heat. Thus, since the jigs 11, 12 can be heated from the interior, it can be rapidly and efficiently fusion-bonded.

Description

[Detailed Description of the Invention] A. Purpose of the Invention (Field of Industrial Application) This invention is aimed at creating a shape that prevents the armature and the unit coils constituting it from losing their shape when manufacturing a flat armature for a flat motor. Regarding the method of fixing the unit coil, the self-bonding insulation coating used on the conductor wires that make up the unit coil is melted to fuse the adjacent conductor wires of the unit coil, and then cooled and shaped so that it does not lose its shape. This method provides a method for forming a flat armature by fixing the coil and connecting a plurality of unit coils in the same manner.

(Prior Art) Since flat motors have a flat shape, they can be easily installed in narrow spaces, and are used as power sources for automobile air conditioner fans, window opening/closing devices, and the like.

The outline of the structure of a flat motor is as shown schematically in Figure 3, where a shaft is placed inside a circular case. , an armature 3 is installed, and the armature 2 is bearing in the center of the case 1 and protrudes from one side of the case. An armature 3 is connected to the end of the shaft 2 inside the case via a post 4. The armature 3 consists of a unit coil 6, which is made by flatly winding a conducting wire 5 covered with a self-bonding insulating coating, as shown in FIG. The unit coil 6 is arranged in a circular blue pattern.
The terminals 5a and 5b of the commutator 7 are connected to the segments of the commutator 7, and the inner periphery of the unit coil inside the commutator 7 and the end of the shaft on the outside of the commutator 7 are aligned, synthetic resin is cast, and these are joined. Ru. The case 1 holds planar blades 8, 8 slidably toward the commutator 7, and is brought into elastic contact with the commutator 7 by a spring 9. Further, permanent magnets 10 and 10 are attached to the case 1 and brought close to the unit coil 6 of the amateur 3, so that the lines of magnetic force are directed to the unit coil. For this purpose, the yoke mounted within the case is omitted in FIG.

When a direct current is passed through the unit coil 6 via the brush 8.8 and the commutator 7, the armature 3 rotates due to the action of the magnetic lines of force of the magnet 10 and 1O and the current flowing through the unit coil 6. In the flant motor configured in this way,
To fix the shape of the unit coil 6 and armature 3, the surface of the fusible insulating coating used for the conductor 5 forming the unit coil is heated and melted, thereby joining adjacent conductors. There is.

Conventionally, to perform such fusion, the unit coil, whose shape is held by a jig, is placed in a heating furnace while the jig is in place to lightly fuse the surfaces of the insulation coatings, and then taken out of the furnace and cooled. First, create a unit coil that is fixed in a certain shape, and then create multiple unit coils.

As shown in Figure 5, the process is sometimes carried out without placing the commutators in a circular arrangement around the commutators by overlapping them one by one), holding them down with a jig and holding them in this state, and putting them in the heating furnace with the jig intact. Heating, fusing,
It was cooled and fixed into a certain shape.

(Problems to be Solved by the Invention) As mentioned above, in the past, unit coils and armatures formed of conductor wires 5 coated with self-bonding insulation were held down with a jig and inserted into a heating furnace for heating. First, the jig must be heated from the outside to raise its temperature, and therefore it takes a long time until sufficient heat is transferred to the unit coil etc.

The heating furnace has drawbacks such as the fact that it must be kept in operation and generating heat, and therefore consumes much more heat than is necessary to fuse the sheathing of the conductor. In addition, when processing multiple unit coils and armatures at once, it is difficult to maintain a strictly constant temperature distribution in the heating furnace, so the melting state of the insulation coating is not uniform, resulting in non-uniformity of the product. There was a danger that this could occur.

(Means for Solving the Problems) The method for fusing coils for flat armatures of the present invention involves heating a unit coil or armature held in the shape to be fixed with a metal jig in a high-frequency induction coil. , which is characterized by heating the jig from the inside using eddy currents generated in the jig to fuse the fusible insulation coating of the conductor that constitutes the unit coil and armature. It was possible to eliminate all the shortcomings.

(Function) When medium-sized coils or armatures arranged in a circle with parts of them stacked one on top of the other are held down with a jig so as not to lose their shape and then placed in a high-frequency induction coil and energized, the jig (iron) holding down the unit coils and armatures eddy currents are generated in metals such as
Due to this eddy current, the jig generates heat from within and quickly rises in temperature. This allows the unit coil or armature to be quickly heated to the required temperature and the self-bonding insulating coating of the conductor to be fused.

Since the jig does not need to heat up more than necessary, by cutting off the power to the high-frequency induction coil, the jig quickly cools down, and the unit coils and armatures that are fixed in a fixed shape can be removed from the jig. can.

(Embodiment) Figures 1 and 2 show examples of methods for fusing unit coils and armature coils according to the present invention. The location is shown briefly.

A. First, a method of fusing the unit coils 6 using the apparatus shown in FIG. 1 will be explained.

A metal lower clamping plate 11, an upper clamping plate 12, a winding core 13, and a spacer 14 are bolted together by a shaft 15, and a conductor 5 is wound around the winding core 13 between the upper and lower clamping plates 11 and 12 to form a unit. A coil 6 is formed.

The jig consisting of the clamping plate under this plate is placed on a non-metallic mounting plate.
6, insert it into the high frequency induction coil I7.

When the high-frequency induction coil 17 is energized, eddy currents are generated in the upper and lower metal clamping plates 11.12, and the temperature of the circular clamping plates 11.12 quickly rises to the temperature required for welding, which covers the conductor 5. heat up. This softens the sheathing of the conductive wires forming the honor coil and fuses them together.

Next, the current of the high frequency induction coil 17 is cut off, and the clamping plate 11.
A jig such as 12 is taken out from the induction coil 17, and when the jig has cooled down, the unit coil 6 fixedly coupled is taken out.

According to tests conducted by non-inventors, when a normal unit coil is heated by a 400 KHz, 7 Kw high frequency induction coil, the energization time to the high frequency induction coil is 0.1~? The temperature of the unit coil reached 180 to 200°C in seconds, making it possible to fuse the conductor coating extremely quickly.

In FIG. 1, if the mounting plate 16 is a non-metallic conveyor, it is possible to continuously fuse a large number of unit coils.

84 Next, a device for welding and fixing an armature with assembled coils will be explained with reference to FIG. metal lower mold 18;
The L-shape 19 has a shape that holds a plurality of unit coils arranged as shown in FIG. 5 and makes them immovable, and its edges act as a stomper. The rest is the same as in the case of the unit coil.

First, when a predetermined number of unit coils fused as described above are arranged as shown in FIG. 5 in the lower mold 18 and a commutator is placed, the terminals 5a and 5b of the unit coils are connected to the commutator, and the upper and lower molds are At the same time, this unit coil group is clamped, inserted into the high frequency induction coil 17, and the coil 17 is energized.

Eddy currents are generated in the metal upper mold 19 and lower mold 18, the sheathing of the conductor wires of the unit coil group is fused, the armature can be taken out after cooling, and continuous work can be performed using a conveyor, etc., in the same way as in the case of unit coils. be.

As a result of testing with the same high-frequency induction coil as the unit coil, the temperature of the armature was 200 to 200 when the current was applied for 1 to 5 seconds.
The temperature was 230″C, and good fusion was achieved.

＼ Effects of the invention (1) Eddy currents are generated in the metal jig by a high-frequency induction coil, and this current causes the jig to generate heat from within, making it easier to use unit coils and armatures than the conventional method of heating the jig from the outside. Can be quickly fused and fixed.

(2) The high-frequency induction coil only needs to be energized when necessary, and does not need to be kept in continuous operation like a conventional heating furnace, so energy consumption is low.

(3) Heating can be easily started and stopped by controlling the energization of the high-frequency induction coil, and is easier to operate than with a conventional heating furnace.

(4) By passing the high-frequency induction coil through the coils and armatures held in place by a jig, welding of a large number of flat coils and armatures can be carried out in succession.

[Brief explanation of the drawing]

FIG. 1 is a side view schematically showing a device for fusing unit coils;
FIG. 2 is a side view schematically showing a device for fusing armatures;
FIG. 3 is a vertical sectional view schematically showing the flat motor, FIG. 4 is a plan view of the flat coil, and FIG. 5 is a schematic plan view of the armature. l: case, 2: shaft, 3: armature, 4: post, 5: conductor, 5a, 5b: terminal, 6: unit coil, 7:
Commutator, 8: Brush, 9: Spring, 10: Permanent magnet, 11: Lower clamping plate, 12: Upper clamping plate, 13: Winding core,
14 Ni spacer, 15: shaft, 16: mounting plate, 17: high frequency induction coil, 18: lower mold, 19: upper mold. Patent applicant: Representative of Japan Radio Co., Ltd.
Kinzo Koyama (and 1 other person) 1rA Figure 2

Claims (1)

[Claims] A unit coil or armature held in the shape to be fixed with a metal jig is heated in a high-frequency induction coil, and the jig is heated from inside by the eddy current generated in the jig.
A method for fusing coils for flat armatures, which comprises fusing fusible insulating coatings of conducting wires constituting unit coils and armatures.