JP3531695B2 - How to connect wires - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] TECHNICAL FIELD The present invention relates to a method for connecting electric wires.
In particular, the connection processing section of the electrically connected wire terminal
It relates to improvement of waterproof treatment to be applied. [0002] 2. Description of the Related Art Wires routed around a car body
-The harness has a wire connection part where the wires are branched and connected.
There are many, but such electrically connected wire ends
The connection section at the end is reliably insulated from the outside and
Need to be watered. Therefore, various electric wire connections
A method has been proposed. For example, Japanese Utility Model Application Laid-Open No. 63-157163 discloses
According to the apparatus for interconnecting electric wires disclosed in, for example, FIG.
As shown, the cores of the electric wires 2 and 3 of the wire harness 1
After connecting the wires to form the connection portion 4, the wires 2 and 3
Overlay a pair of insulating sheets 5 of the same material as the coating
To wrap the connection portion 4 and then the insulating sheet
5 by ultrasonic welding
High coating. On the other hand, Japanese Patent Application Laid-Open No.
According to the disclosed method of connecting a covered electric wire, FIG.
As shown in the figure, the core wires of the pair of electric wires 6 are twisted with each other.
After forming the connecting portion 7, a space is provided between the pair of electric wires 6.
Insert the sa8. Next, the large-diameter portion 9 of the heat-shrinkable tube 9
a small diameter holding the metal sleeve 10 by inserting the electric wire 6 into
The connecting portion 7 is inserted into the portion 9b. And FIG.
As shown in (b), when the assembly is completed,
The connecting part 7 was firmly fixed by caulking the leave 10.
Then, the heat-shrinkable tube 9 is heated and shrunk,
It is sealed by closely contacting the surface. [0005] SUMMARY OF THE INVENTION
Mutual electric wires disclosed in Japanese Unexamined Patent Publication No. 63-157163
The connection unit 4 is insulated,
Into the insulation sheet 5 from the gap between
Moisture may enter, and the connection portion 4 is securely waterproofed.
I can't. You also need an ultrasonic welding machine
Thus, there is a problem that the cost of the manufacturing equipment increases. The above-mentioned Japanese Patent Application Laid-Open No. 1-188981 is also disclosed.
In the case of the insulated wire connection method disclosed in
Requires many parts such as probe, metal sleeve, spacer, etc.
Cost increases. Also, the number of work processes is
And production cost for each process
Increases. Furthermore, the contact resistance between the coating and the inner surface of the tube is large.
And the tip hits the end of the metal sleeve 10
Therefore, it is not easy to insert the connecting portion 7 into the metal sleeve 10.
Absent. [0007] Further, in any connection device and connection method,
However, once water has entered the core,
Water penetrates into the coating from the gap between core wires due to the capillary phenomenon
However, there is also the problem of leaking the current flowing through the wires.
You. Therefore, an object of the present invention is to solve the above problems.
The connection processing section of the electrically connected wire terminal
Providing an inexpensive wire connection method that can be waterproofed
Is to provide. [0008] SUMMARY OF THE INVENTION The above object of the present invention is as follows.Duplicate
A plurality of core wire bundles consisting of several core wires
A method for connecting an electric wire, wherein the electric wire is exposed from an end of the electric wire.
Align the wires so that the tips of the core bundles are aligned.
The core wire bundlesElectrically connected
Thereafter, the core wire is placed in a cyano-based adhesive having a viscosity of 30 cp or less.
And the coating near the core wire are immersed together to form the cyano-based adhesive.
Agent into the gap between the core wires, then the cyano-based
Before the adhesive solidifies, place the wire end in a protective tube.
By inserting, the protective tube and the wire end
Achieved by the method of connecting electric wires, which is characterized by bonding
Is done. [0009]still,The cyano-based adhesive refers to cyanoac
The main component is a monomer of a relate, and water is used as a reaction initiator.
Low viscosity chemical reaction type that can be instantaneously solidified
Adhesive. [0010] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
The embodiment will be described in detail. 1 of the wire terminal shown in FIG.
In the connection processing unit 100,Core consisting of multiple core wires
Insulated outer circumference of wire bundleCoating 21a of a plurality of electric wires 21
Core wire 21b exposed fromBunch ofHowever, at the connection 25
Of the exposed core wire 21bWhole bundle
Is an insulating synthetic resin molded into a bottomed cylindrical shape
It is covered by a protection tube 40 as a member. Soshi
The protective tube 40 is made of a cyano-based adhesive.
The adhesive 30 is bonded to the end of the electric wire. Next, the connection processing unit 1 of the electric wire terminal as described above.
The method of connecting electric wires at 00 will be described. First, several
After removing the covering 21a of the terminal of the electric wire 21, each core 2
After exposing 1b,End of core bundleEach so that
Wires 21 to each otherIn the same directionAdd it. And it
Core wire 21b of each electric wire 21Bunch ofIn close contact with each other
The core wire 21b is welded or crimped in a state.Bunch of
Are electrically connected to each other to form a connection portion 25, and FIG.
The electric wire assembly 20 as shown is manufactured. Next, as shown in FIG.
Dipping the terminal portion of the body 20 into the adhesive 30 in the container A;
Not only the connection part 25 and the core wire 21b but also the vicinity of the core wire 21b
The adhesive 30 is also adhered to the coating 21a. this
At this time, the adhesive 30 has a viscosity of 30 cp (cm
Poise) Use low viscosity cyano adhesive below
In this case, the adhesive 30 is formed in the gap between the core wires 21b by capillary action.
It penetrates into the gap between the plurality of electric wires 21 and between the electric wires 21. In addition, the viscosity is
When a cyano-based adhesive higher than 30 cp is used,
Capillary phenomenon does not occur because of high degree
It was not able to penetrate the gap sufficiently. Also here
The cp (centipoise) as a unit of viscosity is 1 point
A size of 1/100 of as (g / cm · sec)
U. Then, as shown in FIG.
Before the wire is solidified, an electric wire is assembled inside the protection tube 40.
The tip of the body 20 is inserted. At this time, the table of the coating 21a
The amount of the adhesive 30 attached to the surface is relatively large,
Is not solidified, so that the surface of the coating 21a of the electric wire 21
The adhesive 30 adhered to the surface serves as a lubricant. There
Then, the distal end portion of the wire assembly 20 is placed in the protection tube 40.
It can be easily inserted. Next, the tip of the wire assembly 20
When the minute is inserted into the protective tube 40, the coating 21a
The adhesive 30 adhering to the surface is spread thinly,
The adhesive 30 absorbs moisture in the air and instantaneously
The protective tube 40 and the coating 21a are solidified intermittently.
Adheres firmly. Thus, the wire terminal shown in FIG.
Is completed. That is, as schematically shown in FIG.
The low-viscosity adhesive 30 that has penetrated into the gap between
21b is solidified in a wrapped state.
Of the exposed core wire 21b is completely covered with the adhesive 30.
Is Therefore, if moisture enters the protection tube 40,
Even if it is inserted, the core wire 21b does not corrode. Furthermore,
As schematically shown in FIG. 6, the immersion in the gap between the core wires 21b is performed.
The low-viscosity adhesive 30 that has passed through is coated 21 by capillary action.
As it penetrates into the inside of a and solidifies, a protective tube
Moisture that has entered the inside 40 enters the inside of the coating 21a.
It is absolutely waterproof. Therefore, the above-described method of connecting electric wires includes a plurality of electric wires.
Immerse the connection part of the wire end in a low-viscosity cyano-based adhesive.
And then insert it into the protective tube.
Not only do not require expensive manufacturing equipment, but also
Glue does not adhere to the hands of the
The connection work can be performed very efficiently and inexpensively.
Wear. Next, another method of connecting electric wires according to the present invention will be described.
An embodiment will be described. As shown in FIG.
The tip of the assembly 20 is immersed in a low-viscosity adhesive 30.
After that, around the covering 21a of the electric wire 21,
Apply high viscosity adhesive 50 such as tongue, then protect
It may be inserted into the tube 40. In this case, the coating
Further increase the adhesive strength between 21a and protective tube 40
Can be Note that the high viscosity adhesive 50 is protected in advance.
The tip of the wire assembly 20 after being attached in the tube 40
A portion may be inserted into the protective tube 40. The connection processing unit 2 of the electric wire terminal shown in FIG.
00 is a bottomed cylindrical protection tube 60,
A large-diameter portion 61 fitted to the covering 21a of
And a small-diameter portion 62 fitted to the portion 25. There
The large diameter portion 61 and the small diameter portion 62 have low viscosity.
21a and the connecting portion 25 with the adhesive 30 of
Since they are bonded together, the wire assembly 20 and the protection tube 6
The adhesive strength with 0 is improved. The method for connecting electric wires according to the present invention is the same as that described above.
It is not limited by the embodiment, and various changes
It goes without saying that it is possible. For example, the actual
In the embodiment, the protective tube, which is an insulating member, has a bottomed circle.
Although it is cylindrical, it may be simply cylindrical or
A sheet-shaped insulating member may be used. In addition, exposure from multiple wire terminals
For caulking when connecting the drawn core wires electrically
May be used. [0020] According to the method for connecting electric wires of the present invention as described above.
If low-viscosity adhesive is applied,
Penetrates from the gap between the core wires in the
Solidifies, so all of the core wires exposed from the coating
Each is completely covered with adhesive and prevented. Therefore,protection
tubeCore corroded even if moisture entered inside
To reduce the current flowing through the wires due to the intrusion of moisture into the coating.
It does not work. Also, connection of the electric wire of the present invention
The method uses low-viscosity core wires of multiple electrically connected wire ends.
After immersion in liquid adhesive,Insert into the protective tube
ToBecause it is a simple thing, the connection work of the wire
It can be performed efficiently and inexpensively. Therefore,
Reliable waterproof treatment on the connection processing part of the electrically connected wire end
Can provide an inexpensive wire connection method that can
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing a connection processing section of an electric wire terminal according to the present invention. FIG. 2 is a perspective view showing a state in which a plurality of electric wire terminals are connected for explaining the electric wire connection method of the present invention. FIG. 3 is a longitudinal sectional view showing a state in which a connected wire end is immersed in a low-viscosity adhesive to explain a method of connecting a wire according to the present invention. FIG. 4 is a longitudinal sectional view showing a state in which a distal end portion of an electric wire end to which an adhesive is adhered is inserted into a protective tube in order to explain an electric wire connecting method of the present invention. FIG. 5 is a cross-sectional view schematically showing a state around a core wire of an electric wire terminal connected by the electric wire connection method of the present invention. FIG. 6 is a vertical cross-sectional view schematically showing a state of electric wire terminals connected by the electric wire connection method of the present invention. FIG. 7 is a longitudinal sectional view of a connection processing unit of an electric wire terminal according to another embodiment of the present invention. FIG. 8 is a longitudinal sectional view of a connection processing unit of a wire terminal according to another embodiment of the present invention. FIG. 9 is an explanatory diagram showing a connection processing unit of a wire terminal according to a conventional wire connection method. FIG. 10A is an exploded perspective view of an electric wire terminal for explaining another conventional electric wire connection method, and FIG. 10B is an assembled sectional view thereof. [Description of Signs] 20 Wire assembly 21 Wire 21a Coating 21b Core wire 25 Connection part 30 Adhesive 40 Protective tube 100 Connection processing part of wire terminal

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01R 4/22 H01R 4/70

Claims (1)

(57) [Claims] [Claim 1] The outer circumference of a core bundle composed of a plurality of cores is cut off.
A method for connecting a plurality of edge-covered wires, wherein
Front so that the ends of the core bundles exposed from the terminal are aligned
After the wires are attached in the same direction and the core wires are electrically connected to each other , the core wires and the coating near the core wires are immersed together in a cyano-based adhesive having a viscosity of 30 cp or less. Bonding the protective tube and the wire end by infiltrating the system adhesive into the gap between the core wires, and then inserting the wire end into the protection tube before the cyano-based adhesive solidifies. A method for connecting electric wires, characterized in that