JP3454055B2 - Connection structure and connection method of insulated wire - Google Patents

Description

Detailed Description of the Invention

The present invention relates to a connection structure and a connection method for resistance welding an insulated wire and a conductive member, and more particularly to a connection structure and a connection method having low connection resistance and high strength.

[0002]

2. Description of the Related Art As shown in FIG. 14 or FIG. 15, a method of joining an insulated wire having a coating or a coating to a conductive member is performed by first starting from a joining portion 911 of the wire 91 to the insulating coating 9
15 and the coating are removed by a mechanical method or a chemical method, and then solder 93 is welded to the joint portion 911 to connect with the conductive member 92 (FIG. 15) or resistance welding to the conductive member 92 (FIG. 14). There is. In FIG. 14, reference numerals 951 and 952 are welding electrodes, and reference numeral 955 is a power transformer. In FIG. 15, reference numeral 930 schematically shows the jet solder.

When the heat resistance of the coating or coating 915 is low (for example, polyurethane or polyester coating), the coating or coating 915 is removed by the solder 93 without removing the coating or coating 915 as shown in FIG. It is known to melt 915 and solder the insulated wire 91 and the conductive member 92. Similarly, in the case of the resistance welding method, there is also known a method in which the insulation wire 91 and the conductive member 92 are directly resistance-welded by heat fusion without removing the coating or the coating 915.

For example, as shown in FIG. 17, an insulated wire 91 is sandwiched between conductive members 920 bent in a U shape,
A force F is applied to force both members 91 and 920 into electrodes 951 and 952.
Press to apply electricity. Then, the coating 915 and the coating are thermally melted by Joule heat generated by the energizing current I, and the members 91 and 920 are resistance-welded. Thus, the method of joining without removing the coating or coating of the insulated wire 91 is an efficient joining method because the step of removing the coating or coating can be omitted.

[0005]

However, the first method of removing the coating or coating and then soldering or resistance welding is not efficient because it requires the first step of removing the coating or coating. Further, if the wire diameter of the insulated wire becomes thin, it becomes technically difficult to remove the coating or only the coating from the insulated wire, and it becomes difficult to secure the strength of the joint. In addition, the second method of thermally melting the coating or the coating by the heat of the solder has a problem that the coating or the coating has a high melting point, the melting of the coating or the coating is insufficient, and the conduction resistance of the joint is large. is there.

[0006] The third resistance welding method, in which the coating or the coating is melted by welding heat, is high in temperature, so there is no problem in the temperature of melting the coating or the coating, but especially when the wire diameter of the insulated wire becomes thin,
There is a problem that it is difficult to achieve both a sufficiently low conduction resistance and a joint strength for the joint. That is, it is necessary to raise the temperature of the joint in order to cleanly remove the coating or the coating which is an insulator and reduce the conduction resistance. However, if so, the insulated wire that is pressed during welding is greatly deformed and its strength becomes weak.

That is, as shown in FIG. 12 (a), the cross-sectional shape before welding was circular (diameter Do), but in a typical case, for example, elliptical as shown in FIG. 12 (c). The wire is deformed (short diameter D2), and the strength (tensile strength) of the wire becomes weak. Moreover, when a high temperature is applied, the shape is not actually clean as shown in (c), and the shape collapses and variation in shape increases. In addition to this, the wire extends in the longitudinal direction and the cross-sectional area also decreases. As a result, there are many quality variations in the tensile strength of the joint, and the manufacturing yield decreases.

On the other hand, if the heating amount applied to the insulated wire is suppressed in order to avoid such a problem, for example, as shown in FIG.
As shown in FIG. 2 (b), the deformation amount of the electric wire is reduced and the variation of the shape is reduced. And, in terms of tensile strength of the joint, sufficient joint strength can be obtained. However, there is a problem in that a film or a coating which is an insulating material is not completely removed from the joint and remains, and the electric resistance of the joint increases. The present invention has been made in view of the above conventional problems, and it is possible to join without removing the coating or coating of the insulated wire, and to obtain a low electrical resistance and a joining strength at the joining portion. It is intended to provide a connection structure between an electric wire and a conductive member and a method for connecting an insulated wire and a conductive member.

[0009]

According to a first aspect of the present invention, there is provided a resistance welding joint structure having a portion having a large amount of press contact deformation and a portion having a small amount of press contact deformation in a connection portion of an insulated wire. . As a result, the amount of heat generated at the time of joining can be increased in the area where the amount of press contact deformation is large, and the coating or covering of the insulated wire can be sufficiently removed from the joint due to the deformation pressure, and the conduction resistance of the joint can be reduced. Get lower. On the other hand, in the area where the amount of press contact deformation is small, the coating or the coating may be insufficiently removed and the conduction resistance of the joint may increase, but the shape of the wire does not collapse and sufficient tensile strength can be secured. .

The invention of claim 1 has a second feature that a portion having a small amount of pressure contact deformation is located on the proximal end side of the insulated wire. As a result, the part with high welding strength and a small amount of deformation is located on the base end side of the insulated wire (the side that is not the end, that is, the side through which an electric current or signal flows and serves as an electrical conduction path), and the welding force is weak. Since the portion with a large amount of deformation is not located on the base end side, when a tensile force acts between the conductive member and the insulated wire, the strength can be secured by the above-mentioned portion having a strong joint strength ( If a region with a weak welding strength and a large amount of pressure contact deformation is located on the base end side, it will break first here and the tensile strength will weaken). That is,
For example, as shown in FIG. 4, the parallel direction F1 and the vertical direction F2
The tensile strength increases when pulled to.

The conductive member 82 and the insulated wire 81 may be joined at one place (on one surface) as shown in FIG. Further, as described in claim 1, and nipped the the conductive member and the insulated wire from the top and bottom, joined at two locations (upper and lower surfaces). This is because joining on both the upper and lower sides increases the joining strength, lowers the conduction resistance, and facilitates the joining method itself.

That is, in the first aspect of the invention, the conductive member has an integral shape for press-contacting and sandwiching the insulated wire from above and below, and the gap between the above and below is changed depending on the place. The insulated wire is connected from the wide gap portion to the narrow gap portion of the conductive member, and the base end side of the connection portion of the insulated wire is located at the wide gap portion side. As a result, it is possible to obtain both low electrical resistance and joint strength at the joint. Further, since the conductive member is integrated, there is no displacement between the upper piece and the lower piece, and it is easy to handle during assembly work.

[0013] conductive member gap between the upper and lower changes depending on the location, as claimed in claim 1, Ru tare to narrow the gap between the upper opening side of the U-shaped sectional shape of a substantially U-shaped (Fig. 1
reference). The conductive member having such a shape is characterized by being relatively easy to manufacture. Further, a conductive member gap between the upper and lower changes depending on the location, for example as in claim 2, consists of a top section and a lower piece for holding the insulated wire, the location the thickness of the upper piece or lower piece There is a method in which the gap between the upper and lower pieces is widened depending on the location by changing the width (see FIGS. 7 and 8). Such a member is characterized in that it can be easily manufactured by pressing.

Further, the conductive member in which the gap between the upper and lower portions changes depending on the location is, for example, as described in claim 3 , the first insulated wire holding portion having a narrow upper and lower gap, and the second upper portion having a wide upper and lower gap. There is one in which the insulated wire holding portion and the connecting portion connecting both holding portions are formed separately (see FIG. 9).

According to a fourth aspect of the present invention, an electric wire engaging portion for engaging the insulated electric wire is provided on both front and rear sides of the conductive member, and the insulated electric wire is engaged with the electric wire engaging portion. There is one that allows the insulated wire to be arranged from a wide vertical gap portion to a narrow vertical gap portion in the conductive member (see FIG. 2). That is, when one end of the insulated wire is locked to one wire locking part and the insulated wire is stretched between the other wire locking part, the insulated wire is moved upward and downward from a portion of the conductive member with a wide vertical gap. Make sure it is suspended over a narrow space. As a result, the relative position accuracy of the insulated wire and the conductive member can be improved, so that the desired connection structure can be easily obtained by resistance welding in this state.

Next, in the resistance welding method of the insulated wire and the conductive member according to the fifth aspect of the present invention, a portion having a large amount of press contact deformation and a portion having a small amount of press contact deformation are formed at the connection portion of the insulated wire. This is the first feature. As a result, the amount of heat generated at the time of joining can be increased in the region where the amount of pressure welding deformation is large, so that the coating or coating of the insulated wire can be sufficiently removed from the joint, and the conduction resistance of the joint becomes low. . On the other hand, in the area where the amount of press contact deformation is small, the coating or the coating may be insufficiently removed and the conduction resistance of the joint may increase, but the shape of the wire does not collapse and sufficient tensile strength can be secured. .

The resistance welding method according to the present invention comprises:
The second feature is that the portion having a small amount of press contact deformation is located on the proximal end side of the insulated wire. As a result, a portion with a high joint strength and a small amount of pressure contact deformation is located on the proximal end side of the insulated wire. That is, since the portion with weak welding strength and large amount of pressure welding deformation is not located on the base end side, when a tensile force acts between the conductive member and the insulated wire, the portion with high joining strength is stronger. Can be secured.
Therefore, for example, as shown in FIG. 4, the tensile strength when pulled in the parallel direction F1 or the vertical direction F2 becomes large.

Further, in the resistance welding method of the insulated wire and the conductive member according to the invention of claim 6 , the conductive member has an integral shape for pressing and sandwiching the insulated wire from above and below, and the gap above and below is changed depending on the place. Is configured to. The insulated wire is arranged from the wide gap portion to the narrow gap portion of the conductive member such that the base end side of the connection portion of the insulated wire is located in the wide gap portion, and the insulated wire is electrically connected to the insulated wire. Resistance welding is performed by pressure contact with the member.

According to the present invention, since the conductive member has an integral shape for pressing and sandwiching the insulated electric wire from above and below, the conductive member and the insulated electric wire are joined on both sides to increase the joint strength and reduce the conduction resistance. Moreover, since the integral conductive member is sandwiched by the welding electrodes from above and below for resistance welding, the joining work is easy. Further, since the conductive member is integrated, there is no displacement between the upper piece and the lower piece, and the handling is easy at the time of assembly work. For other matters, claim 5
Is the same as.

According to a seventh aspect of the present invention, in the resistance welding method, further, electric wire engaging portions for engaging the insulated electric wires are provided on both front and rear sides of the conductive member. By locking the insulated wire to the stopper, the insulated wire is arranged from the wide gap portion to the narrow gap portion of the conductive member, and the wire positioned on the terminal side of the insulated wire after the resistance welding is completed. Remove the locking part together with the locking wire. As a result, one end of the insulated wire is locked to one wire locking part and the other end of the insulated wire is locked to the other wire locking part, so that the insulated wire can be moved from a portion of the conductive member having a large vertical gap. It can be easily suspended over a part with a narrow vertical gap. Then, by resistance welding in this state, the desired connection structure can be easily obtained. Others are the same as in claim 6 .

According to the invention of claim 8 , in the resistance welding method according to claim 5 , a resistance welding machine in which the gap between the electrodes increases or decreases depending on the direction is provided, and the insulated wire is sandwiched between the conductive members and the insulated wire is provided. The conductive member and the insulated wire are arranged so that the gap between the electrodes changes from the base end side to the end side, and the conductive member and the insulated wire are resistance welded while being pressed between the electrodes ( (See FIG. 11). Then, as described in claim 5 , a portion having a small amount of press contact deformation is located on the proximal end side of the insulated wire.

Since the gap between the electrodes changes depending on the direction, by pressing the conductive member and the insulated wire between the electrodes, the gap between the upper and lower portions of the conductive member changes according to the gap between the electrodes, and the insulated wire is connected to the connecting portion. It is possible to form a portion having a large amount of press contact deformation and a portion having a small amount of press contact deformation. Then, depending on the arrangement of the conductive member and the electrodes of the insulated wire, the base end side of the connection portion of the insulated wire can be located at the portion where the gap is wide. As a result, the action of the invention described in claim 5 can be achieved. Further, the conductive member clamps the insulated wire from above and below, so that the conductive member and the insulated wire are bonded on both sides, increasing the bonding strength and reducing the conduction resistance.

According to a fifth aspect of the present invention, there is provided a resistance welding machine configured such that the gap between electrodes uniformly increases or decreases from one side to the other side, and insulation is provided between conductive members having a U-shaped cross section. Holds the wire and positions the base end of the insulated wire from the U-shaped closed side (bottom side of U) to the U-shaped opening side (upper side of U) and on the U-side closed side. the obliquely insulated wire to be disposed, the pressure as the closed side of the U-shaped is narrow side of the electrode gap between the resistance welding machine of the electrode, you nipped resistance welding (Fig. 1, 3 reference).

[0024] As a result, since the conductive member is pressed against clamping the insulated wire from the top and bottom, the conduction resistance with increasing bonding strength is joined on both sides becomes lower between the conductive member and the insulated wire. Also,
The U-shaped conductive member is easy to manufacture, and since it is integrated, there is no displacement between the upper piece and the lower piece, so that it is easy to handle during assembly work.

According to a ninth aspect of the present invention, in the resistance welding method according to the fifth aspect , there is provided a resistance welding machine configured to uniformly increase or decrease the gap between the electrodes from one to the other, The insulated wire is sandwiched between a pair of conductive members, and the conductive member and the insulated wire are placed between the electrodes so that the base end side is located on the side where the electrode gap is wide from the base end side to the end side of the insulated wire. It is characterized by welding (see FIG. 10). As a result, the effect of the invention described in claim 5 can be obtained. Further, the conductive member clamps the insulated wire from above and below, so that the conductive member and the insulated wire are bonded on both sides, increasing the bonding strength and reducing the conduction resistance.

[0026]

DETAILED DESCRIPTION OF THE INVENTION

Embodiment 1 As shown in FIGS. 1 to 3, this example is a connection method in which an insulated wire 81 having an insulating coating 811 (FIG. 3) and a conductive member 83 are pressure-welded and resistance-welded to each other. Connection part 8
4 is a portion having a large amount of pressure contact deformation (for example, the cross-sectional shape in FIG.
(C)) and a portion with a small amount of press contact deformation (for example, sectional shape FIG. 12 (b)) are connected by press contact, and a portion with a small amount of press contact deformation is located on the proximal end side of the insulated wire 81. Insulated wire 81 and conductive member 83 characterized by
It is a connection method with.

Further, as shown in FIG. 1, the connecting portion 830 of the conductive member 83 has an integral shape with a U-shaped cross section for pressing and sandwiching the insulated wire 81 from above and below, and the gap above and below changes depending on the place. Then, the resistance welding method of the present embodiment, as shown in FIGS.
The first step of arranging the insulated wire 81 from the wide gap portion to the narrow gap portion of the conductive member 83 so that the base end side 841 of No. 4 is located in the wide gap portion and the insulated wire 81 and the conductive portion The second step of press-contacting the member 83 and resistance welding.

Further, as shown in FIG. 2, electric wire locking portions 85 for locking the insulated wire 81 are provided on both front and rear sides of the conductive member 83.
86 is extended, and by locking the insulated wire 81 to the wire locking portions 85 and 86 in the first step, the insulated wire 81 is extended from the wide gap portion to the narrow gap portion of the conductive member 83. After the completion of the second step (resistance welding step), the wire locking portion 86 located on the end 819 side of the insulated wire 81 is locked by the locking wire 818.
And a third step of removing.

A supplementary explanation will be given below for each of these. As shown in FIG. 1, the resistance welding machine 5 of the present example includes a power supply unit 51 and electrodes 52 and 53. The lower electrode 53 is a flat ordinary electrode, but the upper electrode 52 is uniformly inclined. Bottom 52
Have one. Then, the insulated wire 81 is sandwiched between the connecting portions 830 of the conductive member 83 having a U-shaped cross section. Further, as shown in FIG. 3, the base end 841 of the insulated wire 81 is located from the U-shaped closed portion 835 side of the connecting portion 830 to the U-shaped opening portion 836 side and on the U-shaped closed portion 835 side. Insulated electric wires 81 are arranged diagonally so that the U-shaped opening 836 side between the electrodes 52 and 53 of the resistance welding machine 5 is the narrow side of the gap between the electrodes 52 and 53, as shown in FIG. Resistance welding is performed by pressing and sandwiching.

That is, first, the space between the openings 836 of the U-shaped connecting portion 830 is widened and opened at an angle of 60 to 90 °. Then, as shown in FIG. 2, the insulated wire 81 wound from the winding coil is formed into a constriction 851 of the wire locking portion 85.
1 to several turns, and the waste winding absorbs the thermal stress caused by the temperature change. And a constriction 851
After being discarded and wound, the insulated wire 81 starts from the positioning guide portion 852, and the second wire locking portion 86 has a constriction 8
Suspend over 61. Then, it is wound around the constriction 861 several times and fixed.

Subsequently, the gap between the openings 836 of the U-shaped conductive member 83 is narrowed so that the conductive member 83 is not deformed, and the conductive member 83 and the insulated wire 81 are temporarily fixed. A caulking jig having the same inclination as that of the electrodes 52 and 53 is used as the caulking jig for temporarily fixing. As a result of temporary fixing, the conductive member 83
And the insulated wire 81 can secure a stable positional relationship.

Next, as shown in FIG. 1, the electrodes 52 and 53 of the resistance welding machine 5 are pressure-welded and the power source 51 is operated to activate the electrodes 5 and 53.
A current I is passed between 2 and 53 to heat the connection part of the conductive member 83 and the connection part 84 of the insulated wire 81 by Joule heat. As a result, the coating 811 of the insulated wire 81 is melted by heat,
The melted film 811 is removed by the pressure applied to the electrodes 52 and 53. In particular, since the pressing force is strong on the tip side 843 of the insulated wire 81, the coating 811 is well removed, and the electrical connection between the insulated wire 81 and the conductive member 83 becomes good. On the other hand, since the applied pressure is weak on the base end side 841 of the insulated wire 81, the insulated wire 81 is less deformed and the strength of the insulated wire 81 is maintained.

As described above, according to the resistance welding method of this embodiment, the portion 8 having a low electric resistance is connected to the connecting portion 84 of the insulated wire 81.
43 and a portion 831 having high strength are formed. And
Since the strong strength portion 831 is located on the base end side of the insulated wire 81, the bonding strength between the conductive member 83 and the insulated wire 81 is increased. That is, as shown in FIG. 4, the tensile strength when external forces F1 and F2 are applied increases. Then, after the resistance welding is completed, the electric wire locking portion 86 on the terminal 819 side and the electric wire 818 (FIG. 3), which are unnecessary portions, are cut off.

FIG. 6 shows the joint strength when resistance welding is performed by the resistance welding method of this embodiment and when resistance welding is performed by the conventional method shown in FIG. The insulated wire 81 used in the experiment is a copper wire having a wire diameter of 45 microns and a polyamideimide heat-resistant coating (manufactured by Sumitomo Electric Industries, Ltd.). The conductive member 83 is made of C2600 (brass) and Sn.
It is a plated 0.3 mm plate material. Then, a force Po of 85 N is applied between the electrodes 52 and 53 (area of about 12 mm ² ) of the resistance welding machine 5 as shown in FIG. 5 (a), and a force of 900 to 1800 A is applied as shown on the horizontal axis of FIG. Energizing current I
As shown in FIG. 5 (b), o was energized in a pulse shape for a time To of 100 ms.

FIG. 6 is a graph showing the resulting bonding strength F1 (FIG. 4) and the quality of the continuity of the bonded portion (peeling state of the coating). In the figure, a circle and a curve 61 show the result by the resistance welding method of this example, and a triangle and a curve 62 are shown in FIG.
The result by the conventional resistance welding method shown in FIG. 7 is shown. And, the ones marked with black inside the circles and △ indicate poor conduction at the joints, and the ones marked with half of the circles ○ and △ indicate insufficient conduction at the joints. The white coating shows good continuity of the joint.

As can be seen from the figure, in the conventional method, the joint strength F is significantly reduced when the electrical continuity of the joint is maintained in a good state, and is 50% or less of the original strength of the insulated wire 81 as a material. On the other hand, in the present example, it is possible to obtain a good conduction resistance of the joint portion with a smaller energizing current than in the conventional method, the conduction of the joint portion is good, and the joint strength is the original strength of the insulated wire 81. 50% or more of the above can be obtained within a wide range of energizing current. As described above, according to the present example, the insulated wire 81 and the conductive member 83 can be joined without removing the coating or covering of the insulated wire 81, and low electrical resistance and joint strength can be obtained at the joint portion 84. It is possible to obtain a resistance welding method and a joint structure.

Second Embodiment In this embodiment, as shown in FIG. 7, in the first embodiment, an upper piece 7 in which conductive members 711 and 712 sandwich an insulated wire 81 is used.
11 and lower piece 712, upper piece 711 and lower piece 712
Is another embodiment in which the wall thickness of the upper and lower pieces 711, 712 is widened depending on the location by changing the wall thickness of the location depending on the location. As a result, good conduction can be obtained in the narrow gap 715, and the wide gap 71 can be obtained.
6, it is possible to secure good bonding strength. Others are the same as those in the first embodiment.

Embodiment 3 This embodiment is another embodiment in which the shapes of the conductive members 721 and 722 are changed in Embodiment 2 as shown in FIG. As a result, good conduction can be obtained at the narrow gap 725, and good bonding strength can be secured at the wide gap 726. Others are the same as those in the first embodiment.

Fourth Embodiment In this embodiment, as shown in FIG. 9 in the first embodiment, the conductive member 73 has a holding portion 732 of the first insulated wire having a narrow vertical gap and a wide vertical gap. It is another embodiment example consisting of a holding portion 731 of the second insulated wire and a connecting portion 733 connecting both holding portions 731 and 732. As a result, the sandwiching portion 732 having a narrow gap can provide good conduction, and the sandwiching portion 731 having a wide gap can secure good bonding strength. Other than that, Embodiment 1 is used.
Is the same as.

Embodiment 5 This embodiment is similar to Embodiment 1 except that, as shown in FIG.
The conductive members 741 and 742 are composed of an upper piece 741 and a lower piece 742 of uniform plate thickness, and the gap between the electrodes 541 and 542 of the resistance welding machine 5 is changed uniformly depending on the direction. It is an example of an embodiment.

The insulated wire 81 is sandwiched between the conductive members 741 and 742, and the insulated wire 81 has a base end 8
41 to the terminal side 843 so that the gaps between the electrodes 541 and 542 change.
1 and the conductive members 741 and 742 and the insulated wire 81.
It is another embodiment example in which resistance welding is performed while pressing and between electrodes and 541 and 542. Others are the same as those in the first embodiment.

Embodiment 6 As shown in FIG. 11, in this embodiment, in Embodiment 6,
This is another embodiment in which a step is provided in the gap between the electrodes 55 and 56, and an upper piece 741 and a lower piece 742 having a uniform plate thickness are welded by the electrode 55.56 to be deformed by pressure welding.
That is, the electrodes 55 and 56 have wide gaps 551 and
561 and narrow gap parts 552 and 562 with a narrow gap are formed, and the upper piece 74 of uniform plate thickness shown in FIG.
1 and the lower piece 742 and the insulated wire 81 are sandwiched and welded to each other.
The shape of the upper piece 741 and the lower piece 742 shown in FIG. Others are the same as in the sixth embodiment.

[Brief description of drawings]

FIG. 1 is a front view schematically showing a resistance welding method according to a first embodiment.

FIG. 2 is a plan view of the conductive member and the insulated wire of FIG.

FIG. 3 is an enlarged view of a connecting portion of the conductive member and the insulated wire of FIG.

FIG. 4 is a perspective view of a conductive member and an insulated wire after joining in the first embodiment.

FIG. 5 is a diagram showing a time transition of a pressing force and a welding current in a strength test of a conductive member and an insulated wire after joining performed in the first embodiment.

FIG. 6 is a diagram showing the results of a strength test of a conductive member and an insulated wire after joining performed in Embodiment 1, together with a conventional example.

FIG. 7 is a front view schematically showing the resistance welding method according to the second embodiment.

FIG. 8 is a front view schematically showing the resistance welding method according to the third embodiment.

FIG. 9 is a perspective view (a) and a front view (b) schematically showing a resistance welding method according to a fourth embodiment.

FIG. 10 is a front view schematically showing the resistance welding method according to the fifth embodiment.

FIG. 11 is a front view schematically showing the resistance welding method of the sixth embodiment.

FIG. 12 is a cross-sectional shape (a) of the insulated wire before resistance welding and cross-sectional shapes (b) and (c) of the insulated wire after resistance welding.

FIG. 13 is a diagram schematically showing an example in which a portion having a large amount of press contact deformation and a portion having a small amount of press contact deformation are provided in the connection portion of the insulated wire.

FIG. 14 is a front view schematically showing a conventional resistance welding method.

FIG. 15 is a front view schematically showing a conventional joining method by soldering.

FIG. 16 is a front view schematically showing another conventional joining method by soldering.

FIG. 17 is a front view schematically showing another conventional resistance welding method.

[Explanation of symbols]

5. ． ． Resistance welder, 52, 53. ． ． Electrode, 81. ． ． Insulated wire, 711, 712, 73, 741, 742, 83. ． ． Conductive material,

─────────────────────────────────────────────────── ─── Continuation of front page (72) Masami Kojima, 1-1, Showa-cho, Kariya city, Aichi Prefecture DENSO CORPORATION (56) References JP-A-5-38583 (JP, A) JP-A-3-112113 (JP, A) JP-A-2-156606 (JP, A) JP-A-63-237368 (JP, A) JP-A-55-78477 (JP, A) Actual development Sho-63-146448 (JP, U) Actual Kai 59-42010 (JP, U) Actual development 58-118711 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01R 43/04

Claims (9)

(57) [Claims] 1. A connection structure in which an insulating coating or an insulated wire having an insulating coating and a conductive member are pressure-welded and resistance-welded to each other. And a portion with a small amount of pressure contact deformation is located on the proximal end side of the insulated wire, and the conductive member holds the insulated wire from above and below under pressure.
It has a physical shape, and the gap between its top and bottom changes depending on the location.
Has a substantially U-shaped cross section and has an upper portion of the above U-shape
The gap on the opening side is narrowed, and the insulated wire has a wide gap in the conductive member.
To the part of the narrow gap and the connection part
The base end side is the U-shaped closed part where the above-mentioned wide gap is located.
A connection structure between an insulated wire and a conductive member, which is provided obliquely so as to be located on the side . 2. The conductive member according to claim 1 , comprising an upper piece and a lower piece for sandwiching an insulated electric wire, wherein the thickness of the upper piece or the lower piece is changed depending on the location, and thereby the space between the upper and lower pieces is increased. The connection structure between the insulated wire and the conductive member is characterized in that the gap between the two is narrowed depending on the location. 3. The holding member according to claim 1 , wherein the conductive member connects the holding portion of the first insulated wire having a narrow vertical gap, the holding portion of the second insulated wire having a wide vertical gap, and both holding portions. A connecting structure for connecting an insulated wire and a conductive member. 4. The electric wire locking portion according to any one of claims 1 to 3 , wherein the electric wire locking portion for locking the insulated electric wire is extended on both front and rear sides of the conductive member, and the insulated electric wire is attached to the electric wire locking portion. A connection structure between an insulated wire and a conductive member, characterized in that the insulated wire is arranged from a wide vertical gap portion to a narrow vertical gap portion of the conductive member by locking the. 5. A method of connecting an insulating coating or an insulated wire having an insulating coating and a conductive member by pressure welding and resistance welding, wherein a portion having a large amount of pressure contact deformation and a portion having a small amount of pressure contact deformation are provided at a connection portion of the insulated wire. Resistance is configured so that the gap between the electrodes increases or decreases uniformly from one side to the other when the part with a small amount of deformation is located on the base end side of the insulated wire. the welder is prepared, the cross-sectional shape for holding the insulated wire between the conductive member of the U-shaped
Together with the U-shaped closed side from the U-shaped opening side
Moreover, the base end of the insulated wire is located on the U-shaped closed side.
Insulated wires are placed in a diagonal direction and the electrodes of the resistance welding machine
So that the side of the U-shaped opening becomes the narrow side of the electrode gap between
A method for connecting an insulated wire to a conductive member, which is characterized by pressure welding, sandwiching, and resistance welding . 6. A connection method for press-contacting and resistance-welding an insulating coating or an insulated wire having an insulating coating to a conductive member, wherein the conductive member has an integral shape for pressing and sandwiching the insulated wire from above and below. The upper and lower gaps are configured to change depending on the location, and the gap between the wide gap of the conductive member and the narrow gap of the conductive member is set so that the base end side of the connection portion of the insulated wire is located in the wide gap. 6. The insulated wire and the conductive member according to claim 5 , further comprising a first step of arranging the insulated wire and a second step of pressure-welding the insulated wire and the conductive member. How to connect. 7. The wire locking part for locking the insulated wire is extended on both front and rear sides of the conductive member according to claim 6 , and the insulated wire is fitted to the wire locking part in the first step. By locking, the insulated wire is arranged from the wide gap portion to the narrow gap portion of the conductive member, and the wire locking portion located on the terminal side of the insulated wire is engaged after the completion of the second step. A method for connecting an insulated wire and a conductive member, characterized in that a third step of removing together with the stop wire is provided. 8. A resistance welding machine in which the gap between electrodes increases or decreases depending on the direction, the insulated wire is sandwiched between conductive members, and the gap between the electrodes changes from the base end side to the end side of the insulated wire. Yo insulation of the conductive member and the first step of placing an insulated wire, according to claim 5, characterized in that a second step of resistance welding while pressing between the electrodes and the conductive member and the insulated wire A method of connecting an electric wire and a conductive member. 9. A resistance welding machine configured such that the gap between electrodes uniformly increases or decreases from one side to the other side, the insulated wire is sandwiched between a pair of conductive members, and the base of the insulated wire is prepared. The insulated wire and the conductive member according to claim 5 , wherein the conductive member and the insulated wire are arranged between the electrodes so that the base end side is located on the side where the electrode gap is wide from the end side to the end side and resistance welding is performed. How to connect with.