JPH1050543A - Jointing method of wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply joint a heat-proof wire such as a polyamide coated wire etc., to a rod-shaped terminal of a bobbin. SOLUTION: A method for joint of wire includes step in which an insulation coated wire 7 is wound near an edge 8 of a rod-shaped terminal 4 of conductive metal to the center of the terminal, a step in which the insulation coated wire 7 and the rod-shaped terminal 4 except a wound portion 9 near the edge 8 of the rod-shaped terminal 4 with the insulation coated wire 7 wind therearound 4 start to be cooled together by heat sinks 31, 32 from the outside of the insulation coated wire 7, a step in which the edge 8 of the rod-shaped terminal 4 is heated by flame of gas 70 and melted, and the molten metal removes insulation coating of the insulation coated wire 7 of the wind portion 9 and joints the rod-shaped terminal 4 with a core of the wire left on the wind portion 9, a step in which the heatup by the flame of gas 70 is stopped, and a step in which support by the heat sinks 31, 32 are released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire joining method for joining the above-mentioned terminal and the above-mentioned insulated wire, for example, in a coil or transformer in which an insulated wire is wound around a bobbin with a terminal.

[0002]

2. Description of the Related Art For example, when manufacturing a two-terminal coil,
Prepare a bobbin with a terminal, after winding one end of a polyurethane insulated wire or the like around one of the terminals,
It is wound around the cylindrical surface of the terminal-equipped bobbin as many times as a desired inductance value is obtained. Then, the other end of the polyurethane insulated wire is wound around the other terminal. In the case of the work of winding (also referred to as entanglement) around a terminal and the work of winding around a bobbin, an automatic winding machine is used when the number of manufactured products is large.

[0003] Next, in the winding portion around the terminal,
The two-terminal coil is manufactured by burning the polyurethane insulating coating with solder and soldering the core wire and the terminal.

[0004]

By the way, for example, in the case of manufacturing a flyback transformer coil or the like for a television, in recent years, for example, a heat-resistant material having a higher heat resistance, such as a polyurethane insulated wire having a lower heat resistance, has been used. High heat-resistant insulated wires such as polyesterimide or polyamide-imide insulated wires have been used.

However, when a high heat-resistant insulated wire, such as a polyamide-imide-coated wire, which can be used continuously at 200 ° C. or higher can be wound around a terminal of a bobbin and soldered, a polyamide-imide or the like as an insulating coating is used. There is a problem that it takes a long time to remove, and as a result, a long soldering time is required. If the soldering time is long, the thermal effect on the bobbin is increased, and the quality of the product may be reduced.

In order to solve this problem, conventionally, after the insulating coating is mechanically shaved and peeled in advance, a soldering operation is performed.

When the insulated wire is a thin wire or a litz wire (heat-fusible magnet wire), a stripping process using a chemical or a brush or the like after heating and incineration is adopted. ing.

However, any of the above-described mechanical peeling treatment, chemical peeling treatment, or peeling treatment using a brush or the like after heating and incineration is performed as a pretreatment for soldering the terminals. There is a problem that it is inevitable that a high heat-resistant insulated wire cannot be easily (simply and easily) joined to the terminal. As a result, there is a secondary problem that the operation of automatically winding (auto-entanglement) around the terminal cannot be performed smoothly, and the operation of joining the terminal to the terminal cannot be automated.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and has a wire bonding method capable of easily bonding a high heat resistant insulated wire such as a polyamide-imide insulated wire to a bobbin terminal. The purpose is to provide.

[0010]

According to the present invention, for example, as shown in the drawings, an insulated wire 7 is provided from the vicinity of a tip 8 (see FIG. 3) of a rod-shaped terminal 4 made of conductive metal to a center thereof. (S1), and leaving the winding portion 9 near the distal end portion of the rod-shaped terminal around which the insulated wire is wound, leaving the insulation wound around the rod-shaped terminal on the central portion side from the winding portion 9. A step (S3) of contacting the heat sinks 31, 32 (see FIGS. 4 and 5) to the outside of the covered electric wire, and heating the tip end of the rod-shaped terminal by a gas flame while cooling the contact portion 10 by the heat sink. The molten metal is used to remove the insulating coating of the insulated wire of the winding portion, and the insulative coating is removed, and the core 7 of the wire remaining in the winding portion is removed. A step (S7) of performing bonding (see FIG. 9) and said rod-like terminal, and having a.

According to the present invention, the insulated wire is wound from the vicinity of the tip of the rod-shaped terminal toward the center, and the wound portion near the tip of the rod-shaped terminal on which the insulated wire is wound is left. In a state where the insulated wire and the rod-shaped terminal are simultaneously cooled by a heat sink from the outside of the wound insulated wire on the center portion side from the winding portion, the distal end of the rod-shaped terminal is heated by a gas flame. The molten metal is used to remove the insulating coating of the insulated wire of the winding portion with the molten metal, and to remove the insulating coating and join the core wire of the wire left in the winding portion to the rod-shaped terminal. I'm trying to do it.

Since the gas flame has a high temperature of about 2500 ° C. or more, the insulating coating can be removed in a very short time to join the rod-shaped terminal and the core wire.

In this case, the rod-shaped terminal may be a wiring terminal of a coil winding bobbin, or may simply be a wiring terminal of a power transformer or the like.

Further, when a plurality of the rod-shaped terminals are arranged in parallel, by joining a plurality of the rod-shaped terminals at once with a plurality of gas flames, a large number of joints can be performed in a short time.

In this case, the plurality of gas flames may have one input port and the output port may blow out from a plurality of torch chips.

Further, when a plane whose normal line is the axial direction of the rod-shaped terminal is considered at the tip of the rod-shaped terminal, the angle at which the gas flame is sprayed on the rod-shaped terminal is separated from the rod-shaped terminal on the plane. It is preferable to set the angle between 0 ° and 3 ° in the direction.

Furthermore, even if the insulated wire is a high-temperature insulated wire such as a polyesterimide-covered wire or a polyamide-imide-covered wire, the insulating cover is easily removed and the terminal is bonded to the core wire. Can be
It can also be applied to low heat resistant urethane-coated electric wires and enamel-coated electric wires.

Further, the heating time in the step of heating the tip end of the rod-shaped terminal with a gas flame to join the core of the electric wire to the rod-shaped terminal can be detected by a non-contact temperature sensor. .

[0019]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of a bobbin 1 for a flyback transformer coil of a television. Bobbin 1
In order to obtain a desired inductance value, a cylindrical portion (also referred to as a main body portion or a cylindrical surface) 2 for winding an insulated wire, and a flange on a square flat plate attached to both bottom portions of the cylindrical portion 2 And a plurality of rod-shaped terminals 4 made of copper or brass and plated with nickel on one side surface of the flange 3. The cylindrical part 2 and the flange part 3
Are each made of nylon.

In this embodiment, the length of the bobbin 1 is about 40 mm, and the diameter of the cylindrical portion 2 is about 30 mm. The length of one side of the flange 3 is about 35 mm. Further, each rod-shaped terminal 4 is 0.7 mm square, and the height of each rod-shaped terminal 4 from the side surface of the flange portion 3 is about 4.0 mm.
5 mm.

FIG. 2 shows a high-heat-resistant insulation-coated electric wire 7 such as a 30 μm-thick polyesterimide-coated electric wire wound around the cylindrical portion 2 of the bobbin 1 by an automatic winding machine (not shown). The configuration (referred to as a wound bobbin 5) in a state where both ends of the insulated wire 4 are wound (entangled) is shown.

FIG. 3 shows an enlarged view of the configuration in which the insulated wire 7 is wound around one rod-shaped terminal 4. FIG.
As can be seen from the figure, the insulated wire 7 is wound from near the tip portion (the portion including the tip) 8 of the rod-shaped terminal 4 toward the center portion side (the flange portion 3 side) of the rod-shaped terminal 4.

The length h1 of the distal end portion 8 where the insulated wire 7 is not wound is h1 ≒ 0.5 mm, and a portion (called a binding portion) 9 of about 1 mm below the distal end portion 8 is provided.
A portion (referred to as an interval winding portion) 1 in which the insulated wire 7 is wound several times around the binding portion 9 (the length h2 is h2 ≒ 1 mm), and the winding interval is widened below the insulated wire 7.
0 is formed. In this embodiment, the length h3 of the interval winding portion 10 is h3 ≒ 3.0 (= 4.5-0.5).
-1.0) mm. The lengths h1, h2, and h3 of the distal end portion 8, the binding portion 9, and the interval winding portion 10 are merely examples, and can be selected to be optimal lengths through experimental confirmation and the like.

FIGS. 4 and 5 show the rod-shaped terminal 4 and the insulated wire 7 at the binding 9 of the wound bobbin 5 shown in FIG.
1 shows a side configuration and a planar configuration of an electric wire joining apparatus 20 to which the electric wire joining method according to the present embodiment is applied.

4 and 5, the main body 24 of the slide table 22 is placed on a base 21 arranged on a floor or the like.
Has been fixed. A slider 28 which is fed by a motor 26 along a guide rail (not shown) in a horizontal direction indicated by an arrow A or a direction indicated by an opposite arrow B by a motor 26 is attached to the main body 24. The direction of arrow A and the direction of arrow B are also referred to as a sliding direction.

The bottom surface of an L-shaped bobbin support 30 is fixed to the upper surface of the slider 28, and the vertical surface of the bobbin support 30 is orthogonal to the sliding directions A and B when viewed in plan. A positioning pin 33 for positioning and supporting the wound bobbin 5 in the direction is fixed.
The cylindrical hollow portion of the wound bobbin 5 shown in FIG. 2 is inserted, and the wound bobbin 5 is positioned and mounted. At this time, the wound bobbin 5 is prevented from rotating around the positioning pin 33 by a rotation stopper such as a key and a key groove (not shown).

Next, the insulation-covered electric wire 7 and the rod-shaped terminal 4 are supported on the interval winding portion 10 (see also FIG. 3) of the rod-shaped terminal 4 from both sides in the horizontal direction by two rectangular-pillar-shaped heat sinks 31 and 32. I do. At this time, it is preferable that the heat sinks 31 and 32 be fixed with a fastening member (not shown). As the tightening member, a U-shaped spring member that holds the heat sinks 31 and 32 with both sides in the width direction from above in the state of FIG. 5 or a taping member that is wound and held in the width direction of the heat sinks 31 and 32, or the like Can be adopted.
As a material of the heat sinks 31 and 32, a metal excellent in heat dissipation, for example, copper is used.

In this embodiment, the heat sink 3
For the materials 1 and 32, square materials of about 2.5 mm square are used. Cooling water passages 34 and 35 are provided inside the heat sinks 31 and 32 along the axial direction, and cooling water is supplied to the cooling water passages 34 and 35 in series from a water cooling device 36 via a vinyl tube 38. Is done. You may make it supply in parallel.

On the other hand, on the base 21 (because it becomes complicated,
It is not shown in FIG. In (), one end of a column 40 is fixed at a position facing the slide table 22, and a torch table 42 is fixed to the other end of the column 40. On the torch table 42, one end portions of two head support plates 45 and 46 extending in parallel upward are fixed. Head support plate 4
At the other end portions of the torch heads 5 and 46, a substantially central portion of the torch head 50 is rotatably supported as a fulcrum 51. One end of a link 52 is attached to the rear side of the torch head 50. The other end of the link 52 is rotatably attached to one end of the rack 54. The rack 54 includes the torch table 42
And meshes with a pinion (not shown) constituting a feed mechanism 57 attached to the lower surface of the torch base 42. This pinion is fixed to the shaft of the motor 58. By rotating the motor 58, the rack 54
Moves in the direction of the arrow E or F, and a pushing force or a pulling force is applied to the rear side of the torch head 50 via the link 52, and the torch tip 68 moves around the fulcrum 51 of the head support plates 45 and 46 as the rotation center. Rotate in C direction or D direction. In this embodiment, the length of the torch tip 68 is about 10 mm and the diameter is about 0.9 mm.

A torch head 50 is connected to a mixed gas generator 64 for supplying a mixed gas of hydrogen and oxygen (hereinafter simply referred to as gas) through a hose 62. As the mixed gas generator 64, for example, a “precision hydrogen / oxygen mixed gas generator” of models “SW-122” and “SW-125” manufactured by Sun Well Equipment Co., Ltd. can be used.

A temperature sensor 66 for emitting infrared light from the tip is mounted on the upper part of the torch head 50.
The output line of the electric signal of the temperature sensor 66 capable of measuring the temperature in a non-contact manner is connected to a control circuit described later. As the temperature sensor 66, for example, a "built-in non-contact thermometer for control" of model number "BF-12-P2" manufactured by Optex Corporation can be used.

The torch is ejected from the torch tip 68 at the tip of the torch head 50 (emitted, output, or ejected.
Or, it is also called spraying. ) For gas,
When ignited via an ignition electrode described later, the gas flame 7
The positioning of the torch head 50 is adjusted so that the high-temperature portion of 0 contacts the tip 8 of the rod-shaped terminal 4. As described above, the torch head 50 is configured to be rotatable in the direction of the arrow C or D by rotation of the motor 58 within a predetermined range. 4 can be accurately emitted to the tip 8, and the gas flame 70 can be moved upward from the tip 8. The position shown by the two-dot chain line which is kept away from the upper part in the direction of arrow D is the torch head 50 (the torch tip 68).
Is the origin position P, and the position of the torch head 50 (torch tip 68) indicated by the solid line is the joining position Q.

FIG. 6 shows the detailed configuration around the torch head 50 and shows the overall configuration of the torch head control system 75. Torch head control system 75
Has a control device 80. The control device 80 includes a microcomputer, which functions as control, determination, storage, and drive means, and stores a system program and a predetermined control program, as is well known. Further, the control device 80
A timer as time measuring means and a counter as counting means are also provided.

The control device 80 includes a fire extinguishing air electromagnetic valve 81.
And the opening and closing of the mixed gas electromagnetic valve 82,
The opening amount when these input / output ports are connected can be controlled. Further, the control device 80 can drive the ignition electrode 84 via the ignition coil device 83 to ignite the gas. In this case, the fire extinguishing air electromagnetic valve 8
1, mixed gas electromagnetic valve 82, and ignition coil device 8
3 is connected to a power supply terminal (not shown).
[V] or AC 100 [V] power is supplied. Further, the control device 80 is connected to a motor 58 constituting the vertical movement mechanism 56 of the torch chip 68 to control its rotation, and is also connected to the motor 26 for moving the slider 28 to control its rotation. Further, the control device 80
Is also connected to the temperature sensor 66, and indirectly manages and controls the heating time for joining the insulated wire 7 to the rod-shaped terminal 4 by the gas flame 70.

In FIG. 6, one end of an air hose 86a is connected to one input port of the torch head 50, and the other end of the air hose 86a is connected to a fire extinguishing air electromagnetic valve 81.
Output port. An input port of the fire extinguishing air electromagnetic valve 81 and the air compressor 90 are connected by an air hose 86b.

One end of a gas hose 62a is connected to the other input port of the torch head 50,
The other end of 2a is connected to the output port of the mixed gas electromagnetic valve 82. The input port of the mixed gas electromagnetic valve 82 and the mixed gas generator 64 are connected by a gas hose 62b.

In the torch head control system 75 shown in FIG. 6, the air compressor 90 and the mixed gas generator 64 are controlled so as to operate independently of the control device 80. It is easy to make a change so that the operation can be controlled.

An electric wire joining apparatus 20 according to this embodiment
(See FIGS. 4 and 5) are basically configured as described above. Next, the operation thereof will be described based on the flowchart of FIG. Although the control is mainly performed by the control device 80, the control can be performed by an operator as needed.

First, the wound bobbin 5 shown in FIG. 2 is prepared (step S1). In the step of winding the insulated wire 7 around the bobbin 1, an automatic winding machine (not shown) can be used. In this case, the insulated wire 7 is wound around the bobbin 1 (see FIG. 1), as shown in FIG. A binding portion 9 is provided, and an interval winding portion 10 is formed further below the binding portion 9. It goes without saying that the lower part of the interval winding portion 10 is continuous with the coil (insulated wire 7) wound around the cylindrical portion 2.

Next, the wound bobbin 5 is placed on the bobbin support 30.
(Step S2).

Next, the interval winding portion 10 of the one rod-shaped terminal 4
Is supported from both sides in the horizontal direction with the heat sinks 31 and 32 interposed therebetween, and cooling is started (step S3). Cooling water is supplied to the heat sinks 31 and 32 from a water cooling device 36 via a vinyl tube 38. A temperature sensor is attached to the heat sinks 31 and 32, and the temperatures of the heat sinks 31 and 32 can be automatically controlled and managed by feedback control.

Next, the mixed gas electromagnetic valve 82 is opened under the control of the control device 80, and the mixed gas of hydrogen and oxygen is supplied from the mixed gas generator 64 to the torch through the gas hose 62b, the mixed gas electromagnetic valve 82, and the gas hose 62a. It is supplied to the head 50 and emitted from the tip of the torch chip 68 (step S4).

Next, the ignition coil device 83 is driven by the control device 80, and the ignition voltage output from the ignition coil device 83 is supplied to the ignition electrode 84, so that the tip of the torch chip 68 The gas ejected forward in the axial direction is ignited (step S5). The gas ejection pressure is set to about 0.07 kg / cm ² at a point 5 mm forward of the torch tip 68 in the axial direction.

In a state where the gas flame 70 is ejected from the torch tip 68 in a direction on the extension of the axis of the torch tip 68, the motor 58 is driven and the rack 54 is moved in the direction of arrow F, whereby the torch tip 68 is moved. 68 is the origin position P
From the direction of arrow C, a predetermined portion in the gas flame 70 enters a joining position (heating position) Q for heating the distal end portion 8 of the rod-shaped terminal 4 and is stopped (step S6). . The tip 8 of the gas flame 70 at this heating position Q
When the tip 8 considers a horizontal plane whose normal line is the axial direction of the rod-shaped terminal 4, θ
It is preferable that the range of θ = 3 ° upward from = 0 °.

Next, in the state shown in FIG. 5, gas bonding of the insulated wire 7 to the rod-shaped terminal 4 at the end is performed (step S7).

The heating time of the gas bonding can be indirectly controlled by controlling the temperature as shown in FIG. That is, the temperature of the binding portion 9 is monitored by the temperature sensor 66 (step S71), and it is determined whether the temperature taken into the control device 80 has become equal to the set temperature (step S72). The temperature is monitored until they are equal (step S
72: NO), when they are equal (step S72:
YES), it is determined that the gas bonding to the rod-shaped terminal 4 has been completed.

The rod-shaped terminal 4 formed by a gas flame 70 at a high temperature of 2500 ° C. or more (in this embodiment, 2600 ° C.)
In detail, the gas joining process is performed in such a manner that the tip 8 is heated for a certain period of time by the gas flame 70 to become red-hot and then melted, and this becomes granular (substantially spherical) due to surface tension and moves to the binding portion 9 side. Then, the insulating coating of the insulated wire 7 is removed (burned) by the molten metal (molten metal), and the molten metal is welded around the core wire 7a of the insulated wire 7 (see FIG. 9). At this time, the interval winding portion 10 is connected to the heat sink 3
Since the core wire 7a is cooled by 1, 32, the core wire 7a does not burn.

Next, it is determined whether or not the joining of all portions of the rod-shaped terminal 4 has been completed (step S8). If not completed (step S8: NO), the motor 26 for driving the slide table 22 Is driven to move the slider 28 on the guide rail (not shown) in the direction of arrow B (step S9), and the tip 8 of the next rod-shaped terminal 4 is heated by the gas flame 70 (again, step S9).
7).

In this manner, when the gas bonding to all the rod terminals 4 is completed (step S8: YE
S), again, the motor 58 for rotating the torch head 50 is driven, and the rack 54 is pulled in the direction of arrow E,
The torch tip 68 returns to the origin position P (step S
10).

Thereafter, the fire extinguishing air electromagnetic valve 81 is opened for a certain period of time to extinguish the gas (step S11). The fire extinguishing air electromagnetic valve 81 and the mixed gas electromagnetic valve 8
2 is closed and the supply of gas and air is stopped (step S12), the support (contact state) by the heat sinks 31, 32 is released, and the heat sinks 31, 32 are detached (step S13).

Through this series of processes, the gas joining of the insulated wire 7 to the rod-shaped terminal 4 attached to the flange 3 on one side of the wound bobbin 5 is completed. Next, in a similar process, gas bonding of the insulated wire 7 to the rod-shaped terminal 4 on the flange 3 on the opposite side of the wound bobbin 5 is performed. At the end of the gas joining, a flyback transformer coil as a product is completed.

In the above-described embodiment, in the gas bonding process of step S7, the heating time is indirectly monitored by monitoring the temperature, and the completion of the gas bonding is monitored. For example, as shown in FIG. 10, the completion of the gas joining may be determined by time management based on time measurement by a timer. That is, the gas flame 70
To the tip of the rod-shaped terminal 4 (step S
6) The timer may be started (step S73), and the completion of the gas joining may be determined when the set time has elapsed (step S74: YES). In this case, temperature and time management can be used together in order to perform more precise gas bonding. In addition, when there are few gas joining parts, sufficient joining is possible even by manual operation by visual observation.

Further, in the above-described embodiment, the torch tip 68 constituting the torch head 50 ejects one gas flame 70, but the invention is not limited to this.
As shown in FIG. 1, a torch head 50a having one input port and a plurality of output ports, for example, four torch chips 68a to 68d can be used. By using the torch head 50a, the gas bonding time can be considerably reduced. For example, when the torch head 50a is applied to the wound bobbin 5 in the example of FIG. 2, the four rod-shaped terminals 4 attached to one of the flange portions 3 can be simultaneously joined.

Further, in the above-described embodiment, the rod-shaped terminal 4 to be joined is the rectangular wiring terminal of the flyback transformer coil bobbin 1. However, the present invention is not limited to this. It can also be applied to the output terminal of a power transformer. In this case, gas bonding between the relatively thick insulated wire and the output terminal is performed.

Further, the present invention can be applied to a flat lug terminal or the like in place of the rectangular or cylindrical rod terminal 4.
In this case, it is easy to change the shape of the torch tip to an optimum shape according to the shape of the terminal.

Of course, the insulation-coated wires are not limited to high-heat-resistant polyesterimide-coated wires and polyamide-imide-coated wires, but also conventionally used relatively low-heat-resistant urethane-coated wires and enamel-coated wires. Can be joined to terminals.

It should be noted that the present invention is not limited to the above-described embodiment, but can adopt various configurations without departing from the gist of the present invention.

[0059]

As described above, according to the present invention, the insulated wire is wound from the vicinity of the tip of the bar-shaped terminal toward the center, and the tip of the bar-shaped terminal around which the insulated wire is wound. In a state in which the insulated wire and the rod-shaped terminal are simultaneously cooled by a heat sink from the outside of the insulated wire wound around the central portion from the wound portion, leaving a nearby wound portion (entangled portion). Heating the distal end of the rod-shaped terminal with a gas flame to dissolve the molten metal, and removing the insulating coating of the insulated wire of the winding part with the molten metal;
The insulating coating is removed, and the core of the electric wire left in the winding portion and the rod-shaped terminal are joined.

Since the gas flame has a high temperature of about 2500 ° C. or more, the insulating coating can be removed in a very short time to join the rod-shaped terminal and the core wire.

In this case, if the rod-shaped terminal and the insulated wire are not simultaneously cooled by the heat sink as the heat radiating means, heat is applied to components (for example, the bobbin main body) existing on the side opposite to the tip end side of the rod-shaped terminal. Although there is a concern that a shock may be applied, the heat sink can substantially eliminate the thermal effect on the component. In addition, the heat sink makes it possible to balance the heat between the rod-shaped terminal and the core wire of the insulated wire. If thermal equilibrium is not achieved using a heat sink, the core wire, for example,
The problem that a copper wire burns arises.

The degree of adhesion of the insulated wire around the rod-shaped terminal is also an important condition for obtaining a good bonding state, and this condition can be easily determined by trial and error.

The present invention can be applied even when a so-called fusing method cannot be adopted.

By employing the present invention, there is no need to perform any of the following pretreatments: mechanical stripping of the insulating coating, chemical stripping, or stripping with a brush after heating and incineration. A highly heat-resistant insulated wire can be easily (simplely and easily) joined to the rod-shaped terminal. As a result, it is possible to smoothly perform automatic winding (automatic entanglement) around the rod-shaped terminal, and automation of joining work to the rod-shaped terminal can be easily achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a bobbin for a flyback transformer coil.

FIG. 2 is a perspective view showing a configuration of a wound bobbin in which an insulated wire is wound around the bobbin of FIG. 1;

FIG. 3 is a perspective view for explaining how to wind an insulated wire around a rod-shaped terminal of a bobbin.

FIG. 4 is a partial cross-sectional side view showing a side configuration of the electric wire bonding apparatus.

FIG. 5 is a plan view showing a plan configuration of the electric wire bonding apparatus.

FIG. 6 is a block diagram showing a configuration of a torch head control system.

FIG. 7 is a flowchart provided for describing the operation of the torch head control system.

FIG. 8 is a flowchart provided for describing an example of a gas bonding process.

FIG. 9 is a perspective view showing a configuration in a state where the core wire of the insulated wire and the rod-shaped terminal are gas-joined.

FIG. 10 is a flowchart provided for explaining another example of the gas bonding step.

FIG. 11 is a front view showing another configuration example of the torch head.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bobbin for flyback transformer coil 2 ... Cylindrical part 3 ... Flange part 4 ... Bar-shaped terminal 5 ... Winded bobbin 7 ... Insulated wire 8 ... Tip part 9 ... Tying part 10 ... Interval winding part 22 ... Slide table 24 … Slide table body parts 26, 58 Motor 28 Slider 30 Bobbin support 31, 32 Heat sink 33 Positioning pin 36 Water cooling device 38 Vinyl tubes 50, 50a
Torch head 64 ... Mixed gas generator 66 ... Temperature sensor 68, 68a-68d ... Torch chip 80 ... Control device 81 ... Fire extinguishing air electromagnetic valve 82 ... Mixed gas electromagnetic valve 83 ... Ignition coil device 90 ... Air compressor

Claims (7)

[Claims] 1. A step of winding an insulated wire from near the tip of a rod-shaped terminal made of a conductive metal toward a center thereof, and leaving a wound portion near the tip of the rod-shaped terminal around which the insulated wire is wound. Contacting a heat sink to the outside of the insulated wire wound around the rod terminal on the center side of the winding part; and the tip of the rod terminal while cooling the contact part by the heat sink. The portion is heated and melted by a gas flame, and the molten metal is used to remove the insulating coating of the insulated wire of the winding portion, and the insulative coating is removed and the core wire of the wire left in the winding portion and the wire. A step of joining with a rod-shaped terminal; and a wire joining method. 2. The method according to claim 1, wherein the rod-shaped terminal is a wiring terminal of a bobbin for winding a coil. 3. The method according to claim 1, wherein when a plurality of said bar-shaped terminals are arranged in parallel, a plurality of said bar-shaped terminals are joined at once by a plurality of gas flames. . 4. The method according to claim 3, wherein the plurality of gas flames have one input port and the output port is blown out from a plurality of torch tips. 5. The method according to claim 1, wherein when a plane having a normal to an axial direction of the rod-shaped terminal is considered at a tip end of the rod-shaped terminal, a spray angle of the gas flame to the rod-shaped terminal is: 0 ° to 3 ° in a direction away from the rod-shaped terminal on the plane
An electric wire joining method characterized by being set between degrees. 6. The method according to claim 1, wherein the insulated wire is a high-temperature insulated wire such as a polyesterimide-coated wire or a polyamide-imide-coated wire. 7. The method according to claim 1, wherein the step of heating the tip end of the rod-shaped terminal with a gas flame to join the core wire of the electric wire to the rod-shaped terminal is performed at a non-contact temperature. A method for bonding electric wires, comprising indirectly controlling the temperature of the winding portion detected by a sensor.