JP3423752B2 - Wire connection device and connection method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire connecting device and connecting method which can be used when a matrix joint is incorporated in a wire harness, for example.

[0002]

2. Description of the Related Art Conventionally, as a method for connecting electric wires, a method for directly connecting conductors of electric wires has been developed as a method for obtaining a highly reliable connection state (Japanese Patent Laid-Open No. 1-13207).
7 publication). In this connection method, the conductors from which the insulating coating of the connected electric wire is stripped are superposed, the superposed portion is sandwiched between a pair of electrodes, and the superposed portion is generated by resistance heating of the electrodes themselves due to conduction between the electrodes. The conductors are directly connected to each other.

This connecting method will be described below as a connecting method of electric wires when a matrix joint is assembled in a wire harness.

As shown in FIG. 5, the matrix joint 100 is formed by sandwiching a plurality of conductors 101, which are arranged in parallel at a predetermined interval, between sheet-like insulating coatings 102 and 102. This matrix joint 1
In order to connect the branch wire 200 to the conductor 101 of No. 00, the insulating coating 102 at the connection location is locally peeled off to expose the conductor exposure hole 103.
And the conductor 10 exposed from the conductor exposure hole 103 is formed.
The conductor 201 exposed by peeling off the insulating coating 202 of the branch wire 200 is superposed on the first conductor 1 in a crossed state. Then, as shown in FIG. 6, the pair of electrodes 3 are arranged so that the overlapping portions are arranged vertically.
01 and 302, and press and sandwich the electrodes 301 and 302 approaching each other, and then the electrodes 301 and 3
Due to the resistance heat generation of the electrodes 301 and 302 themselves due to the energization between 02, the conductors 101 and 201 in the overlapping portion are melted and the conductors 101 and 201 are directly connected.

By such a connecting method, a large number of branch wires 200 constituting a variety of circuits are connected to the matrix joint 100 incorporated in the wire harness.

[0006]

There is a possibility that various tensions may be applied to the matrix joint 100 to which a large number of branch wires 200 are connected as described above due to the tension of each branch wire 200. The tension may directly affect the joint between the conductors 101 and 201. In this way, in the case where the tension directly affects the joint after joining, there is a problem in connection strength in the above-described conventional wire connecting method.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to complicate the process of a wire connecting structure which does not directly affect the connection between conductors by the adverse effect of tension. An object is to provide a wire connecting device and a wire connecting method that can be easily obtained without using a wire.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 is to superimpose conductors of a pair of connected electric wires from which insulation coatings have been stripped, and to superpose the superposed portions with a pair of electrodes. In a wire connecting device which is sandwiched under pressure and directly connects the conductors of the overlapping parts by resistance heat generation of the electrodes themselves due to energization between the electrodes, in the periphery of the electrodes, the pair of connected wires and It is placed between the insulation coatings of this pair of connected wires and is connected by the electrodes.
Sandwiching portion for sandwiching a hot-melt adhesive which melts by heat transfer conductor is provided with, the clamping portion, the clamping-side tip
It is characterized in that a resin pad is fixed to the .

A second aspect of the present invention is the electric wire connecting device according to the first aspect, wherein one of the pair of electric wires to be connected is a matrix joint.

According to a third aspect of the present invention, the conductors of the pair of connected electric wires whose insulating coatings have been peeled off are overlapped with each other, and the overlapped portion is pressed and sandwiched between the pair of electrodes, and the electric current between the electrodes is applied. In the method of connecting electric wires for directly connecting the conductors of the overlapping portions by resistance heat generation of the electrodes themselves, a heat-melting adhesive is arranged between the insulating coatings of the pair of connected electric wires, and the conductor of the overlapping portions is arranged. It is characterized in that the heat-melting adhesive is melted by heat transfer through a conductor at the time of connecting them to bond the insulating coatings of the pair of connected wires.

According to a fourth aspect of the present invention, there is provided a method of connecting electric wires according to the third aspect, wherein one of the pair of electric wires to be connected is a matrix joint, and the heat-melting adhesive is an insulation of the matrix joint. It is characterized in that it is formed in a ring shape so as to substantially match the shape of the conductor exposed hole where the coating is peeled off.

[0012]

According to the first aspect of the present invention, the clamped portions provided around the electrodes do not cause displacement of the relative positions of the connected electric wires during connection and between the connected electric wires and the heat-meltable adhesive. Since it is held at a desired position, a connection structure of conductors and a connection structure of electric wires in which insulating coatings are joined can be reliably obtained.

Since this electric wire connecting structure has a highly reliable conductor connecting portion in which conductors are connected to each other and an insulating coating joint portion in which insulating coatings are joined to each other, the tension applied to the connected electric wire after connection is established. Can be shared by the conductor connecting portion and the insulating coating joint portion without concentrating on the conductor connecting portion, and thus the conductor connecting portion has a reinforced connection structure.

According to the second aspect of the present invention, the electric wire connection structure is obtained by connecting the matrix joint to another electric wire, and the conductor connection is applied to tensions in various directions applied to the matrix joint after connection. The connection structure of the electric wire with the reinforced portion can be reliably obtained.

According to the third aspect of the invention, since the connection between the conductors and the connection between the insulating coatings can be obtained in one step instead of separate steps, the process is not complicated.
The conventional connecting process between conductors can be applied as it is.

According to the fourth aspect of the present invention, the heat-melting adhesive used in the step of connecting the electric wires is formed into a ring shape so as to substantially match the conductor-exposed hole formed by removing the insulating coating of the matrix joint. Therefore, the positioning on the matrix joint becomes easy.

[0017]

The present invention will be described in detail below with reference to the illustrated embodiments.

FIG. 1 shows an electric wire connection structure obtained as an example. This electric wire connection structure is one in which a branch wire 200 is connected to a matrix joint 100, and a conductor 101 on the side of the matrix joint 100 exposed from a conductor exposure hole 103 and a conductor 201 on the side of the branch wire 200 from which an insulating coating 202 is peeled off. In addition to being directly connected, the insulating coating 102 on the side of the matrix joint 100 and the branch wire 200
It has a structure in which the insulating coating 202 on the side is joined via a hot-melt adhesive 1 as a hot-melt adhesive.
At this time, the hot-melt adhesive 1 is formed into a substantially circular ring in conformity with the shape of the conductor exposing hole 103.

This electric wire connection structure is composed of conductors 101, 20.
While having a highly reliable connection structure in which ones are connected to each other, tensions in various directions applied to the matrix joint 100 are not concentrated on the conductor connection portion,
The conductor connecting portion and the insulating coating joint portion can be shared, and by extension, the electric conductor connecting structure is obtained by reinforcing the conductor joint portion.

Such a wire connecting structure can be obtained by the following connecting device and connecting method.

FIG. 2 shows an electrode 2 of an electric wire connecting device as an example.

The electrode 2 is composed of an electrode body 21 and a holding portion 22 attached to the electrode body 21 so as to surround the electrode tip portion 21a of the electrode body 21.

The electrode body 21 is a rod-shaped body having a circular cross section made of a metal having a high resistance and a high melting point, for example, a metal such as a tungsten alloy, molybdenum and tantalum. The tip of the electrode body is a tapered electrode tip having a flat surface. The portion 21a is formed (see FIG. 3).

The holding portion 22 is composed of a holding base 22a fixed to the upper portion of the electrode tip 21a of the electrode body 21 and a resin pad 22b fixed to the front end of the holding base 22a. The holding base 22a is used for the electrode body 2
1 has an inner diameter substantially the same as the outer diameter of 1, and is formed of a cylindrical body in which leg portions 22c are formed in a protruding manner at opposing positions, and the leg portions 22c are positioned on the electrode tip portion 21a side. It is externally attached and fixed to the electrode body 21. The resin pad 22b is made of a heat resistant resin, for example, a silicone resin, and is fixed to the leg portion 22c of the holding base 22a.

As shown in FIG. 3, the electrodes 2 thus formed are arranged vertically so that the electrode tips 21a thereof face each other, and are arranged so that they can approach and separate from each other to form a wire connecting device. I am configuring.

Next, a method of connecting electric wires using this electric wire connecting device will be described.

First, as shown in FIG. 2, the conductor coating hole 103 is formed by peeling off the insulating coating 102 at the location where the branch wire 200 of the matrix joint 100 is to be connected.
Then, after placing the hot-melt type adhesive 1 formed in a substantially circular ring shape so as to substantially coincide with the conductor exposure hole 103 on the insulating coating 102 forming the peripheral portion of the conductor exposure hole 103, the adhesive 1 The branch line 200 to be glued is overlaid. In the branch wire 200, the conductor 201 exposed by peeling off the insulating coating 202 is overlapped with the conductor 101 exposed from the conductor exposure hole 103 in a cross shape, and the conductor 201 exposed.
The insulating coating 202 near the hot melt adhesive 1
Stack so that it is located on top.

Thus, the matrix joint 100
After arranging the branch line 200 and the branch line 200, as shown in FIG.
The intersection of 01 and 201 is a pair of electrode tips 21a, 2
Set it on the wire connecting device so that it is located between 1a.

After that, the pair of electrodes 2, 2 are brought close to each other, and the conductors 101 and 20 are provided between the electrode tip portions 21a, 21a.
While sandwiching the intersection of 1 under pressure, the resin pad 22
The hot melt adhesive 1 is sandwiched between b and 22b together with the branch wire 200 and the matrix joint 100, or together with the matrix joint 100.

After that, electricity is applied between the electrode tip portions 21a, 21a to cause resistance heating of the electrode tip portion 21a itself, and the heat generation causes the conductors 101 and 201 to be welded to connect the conductors at the intersections. At this time, the heat for welding the conductors 101 and 201 is transferred to the a direction and the b direction through the conductors 101 and 201, respectively, as shown in FIG.
Each part 1a and 1b of the hot melt adhesive 1 on 1 and 201 is melted. As a result, in the portion 1a, the matrix joint 1 is bonded via the hot melt adhesive.
00 side insulation coating 102 and branch wire 200 side insulation coating 20
2 and the hot melt adhesive 1 adheres to the insulating coating 102 on the matrix joint side at the portion 1b. In this way, the electric wire connection structure shown in FIG. 1 in which the conductors 101 and 201 are connected and the insulating coatings 102 and 202 are connected and joined is obtained.

As described above, according to the electric wire connecting device of the present embodiment, since the sandwiching portion 22 is provided on the electrode 2, between the matrix joint 100, the branch wire 200 and the hot melt adhesive 1 at the time of electric wire connection. It is possible to reliably obtain the electric wire connection structure shown in FIG.
Further, the holding portion 22 is an electric wire (matrix joint 1
00 and the branch line 200) and the contact side of the hot melt adhesive 1 with the resin pad 22b can prevent the positional deviation more effectively and damage the hot melt adhesive 1 when sandwiched. Can also be prevented.

According to the electric wire connection method of this embodiment, the insulation coatings (insulation coatings 102, 202) are joined together by utilizing the heat generated when the conductors (conductors 101, 201) are welded. Therefore, it is not necessary to provide the conductor connecting step and the insulating coating joining step as separate steps,
Since the conductors and the insulating coatings can be connected and joined in one process, the process is not complicated. The hot melt adhesive 1 used is the conductor exposure hole 1
Since it is formed in a substantially circular ring shape having a size substantially corresponding to 03, the positioning when mounting on the insulating coating 102 is easy, and the clamping by the clamping part 22 at the time of wire connection can be easily performed.

[0033]

As described in detail above, according to the first aspect of the present invention, the heat-meltable adhesive provided around the electrode is disposed between the connected electric wire and the insulating coating of the connected electric wire. Hold the sandwiching part with a resin pad fixed to the tip of the sandwiching side.
Since it is configured as a
It is possible to prevent relative displacement more effectively.
At the same time, prevent the hot melt adhesive from being damaged when sandwiched.
As a result, it is possible to reliably obtain the electric wire connection structure having the conductor connection portion and the insulating coating joint portion at a desired position. Since this electric wire connection structure has a highly reliable conductor connecting portion in which conductors are connected to each other and an insulating coating joint portion in which insulating coatings are joined to each other, the tension applied to the connected electric wire is applied to the conductor connecting portion and the insulating coating. Since it can be shared with the joint portion to avoid concentration on the conductor connection portion, the conductor connection portion has a reinforced connection structure.

According to the second aspect of the present invention, the electric wire connection structure in which the conductor connection portion is reinforced can be obtained in the connection between the matrix joint and another electric wire.
It is possible to obtain a highly reliable electric wire connection structure regardless of the matrix joint to which tensions in various directions are applied.

According to the third aspect of the present invention, a heat-melting adhesive is disposed between the insulating coatings of the electric wires to be connected, and the heat-melting property is provided by heat transfer through the conductors when the conductors are connected. Since the insulating coatings of the electric wires to be connected are joined together by melting the adhesive, it is not necessary to provide the conductor connecting step and the insulating coating joining step as separate steps, and the electric wire in which the conductor connecting portion is reinforced is provided. The conventional connecting process can be directly applied to the connecting structure of No. 1 without complicating the process.

Further, according to the invention of claim 4, the heat-melting adhesive used in the step of connecting the electric wires is formed into a ring shape by being substantially matched with the conductor exposed hole formed by removing the insulating coating of the matrix joint. Since it is formed, positioning on the matrix joint is easy and the connecting step is further facilitated.

[Brief description of drawings]

FIG. 1 is a perspective view showing an electric wire connection structure obtained as an example.

FIG. 2 is a perspective view of an electrode of a wire connecting device according to an embodiment.

FIG. 3 is a cross-sectional view showing an electric wire connecting device and a connecting method as an example.

FIG. 4 is a plan view illustrating a method of connecting electric wires as an example.

FIG. 5 is a perspective view showing a conventional electric wire connection structure.

FIG. 6 is a perspective view illustrating a conventional method for connecting electric wires.

[Explanation of symbols]

1 Hot-melt adhesive (heat-melting adhesive) 2 electrodes 22 clamping part 100 matrix joint (connected wire) 101 conductor (matrix joint) 200 branch lines (connected wires) 201 conductor (branch)

Continuation of front page (56) Reference JP-A-4-162384 (JP, A) JP-A-5-121139 (JP, A) JP-A-2-212125 (JP, A) JP-A-5-277749 (JP , A) JP-A-4-186697 (JP, A) JP-A-55-1063 (JP, A) JP-A-59-192773 (JP, A) Registered utility model 3031272 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) H01R 43/02 B21F 15/08 H01R 11/01 H01R 4/02 H01R 9/07 H01B 7/00 301

Claims (4)

(57) [Claims] 1. A pair of conductors to which the insulating coatings of the connected electric wires are stripped are superposed, and the superposed portion is pressed and sandwiched between a pair of electrodes, and resistance heating of the electrodes themselves is caused by energization between the electrodes. In the electric wire connecting device for directly connecting the conductors of the overlapped portion, in the periphery of the electrodes, the pair of connected electric wires and the pair of connected electric wires arranged between the insulating coatings are connected by the electrodes.
A sandwiching part for sandwiching a heat-melting adhesive that is melted by heat transfer of the conductor at the time of connection is provided, and the sandwiching part is configured by fixing a resin pad to the tip of the sandwiching side.
A wire connection device characterized by being made . 2. The electric wire connecting device according to claim 1, wherein one of the pair of electric wires to be connected is a matrix joint. 3. A pair of conductors to be connected, the insulating coatings of which are stripped of insulation, are overlapped with each other, and the overlapped portion is pressed and sandwiched between a pair of electrodes, and resistance heating of the electrodes themselves is caused by conduction between the electrodes. In the method of connecting electric wires for directly connecting the conductors of the overlapping portion, a heat-melting adhesive is arranged between the insulating coatings of the pair of connected electric wires, and a conductor at the time of connecting the conductors of the overlapping portion is formed. A method of connecting electric wires, characterized in that the heat-melting adhesive is melted by heat transfer via the wires to bond the insulating coatings of the pair of connected electric wires. 4. The method of connecting electric wires according to claim 3, wherein one of the pair of electric wires to be connected is a matrix joint, and the heat-melting adhesive is a conductor exposed by removing an insulating coating of the matrix joint. A method of connecting an electric wire, which is formed in a ring shape so as to substantially match a shape of a hole.