JP2002369328A - Method and structure for intermediate waterproof joint for wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an intermediate waterproof joint for wires on a wire harness assembling work table. SOLUTION: Terminals are connected to the ends of wires and insulation coating is stripped at intermediate parts of the wires to expose the cores for intermediate connection. Terminals connected to the ends of a plurality of wires including the wires are connected to one connector to form a temporarily bound harness. A plurality of temporarily bound harnesses are then bound and, on a work table for binding the plurality of temporarily bound harnesses to assemble a true wire harness, intermediate connection cores of the plurality of temporarily bound harness are collected and welded by means of resistance welding. Subsequently, the welded part is filled with silicon and an adhesive sheet is wound on the outer circumferential surface of the silicon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate waterproof connection method and an intermediate waterproof connection structure for electric wires used in an automobile wire harness, and more particularly to a different temporary binding on a wire harness assembling worktable where the temporary binding harness is fully bound. This is an intermediate waterproof connection between the wires of the harness.

[0002]

2. Description of the Related Art Conventionally, when connecting a large number of wires such as three or more wires, a terminal concentrated splice technique shown in FIG. 5 is often adopted. In this terminal concentrated splice, the terminal of the electric wire w to be connected is peeled to expose the core wire c, and the ends of these core wires c are aligned and resistance welding is performed by the resistance welding machine 1. If it is necessary to take a waterproofing measure for the welded portion 2, the welded portion 2 is inserted into a resin cap 4 held inside the case 3, and then filled with a waterproofing agent 5 melted at a high temperature. , The water blocking agent 5 is cured.

[0003] Instead of the above-mentioned terminal concentrated splice, a joint connector is used, the terminal connected to the wire terminal is connected to the joint connector, and the terminal is connected by a joint bus bar housed in the joint connector. In some cases, a group of wires is connected.

[0004]

In the case of the terminal-spliced splice shown in FIG. 5, the number of electric wires is increased because the connection is made at the end of each electric wire. Double. Also, the wires to be connected are
When belonging to different temporary binding harnesses, it is not easy to perform the work of aligning the wire terminals on the wire harness assembly work table. In the case of the waterproof type, a resin cap must be arranged on the work table, and a water-stopping agent filling machine for filling the resin cap must be mounted. Some waterproofing agents cannot be used on a workbench. Therefore, it is not possible to form a terminal-concentrated splice by a line operation on a workbench, and the operation is performed off-line, resulting in a problem that the workability is extremely poor and costly.

On the other hand, when the later-described joint connector is used, it is possible to perform in-line work on a work table for assembling a wire harness. The final insertion terminal is apt to be damaged before this binding,
There is a problem that it takes time and labor to perform the final binding. Furthermore, a joint connector and a terminal to be connected to each electric wire are required, so that the number of parts is increased, and labor for connecting the terminal to the electric wire, connecting the terminal to the connector, and the like are required. Work is also required. In particular, in the case of a waterproof type, a joint connector of a waterproof specification is required, and there is a problem that the number of parts further increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to make it possible to easily connect electric wires of different temporary binding harnesses in an in-line operation on a wire harness assembly work table.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention firstly connects a terminal to an end of an electric wire and peels off an insulating coating at an intermediate portion of the electric wire to form an intermediate connection. The core wires are exposed, and a plurality of electric wires including the above electric wires are connected to terminals connected to their terminals to one connector to form a temporary binding harness, and the plural temporary binding harnesses are finally bound. On the worktable for assembling the wire harness, the core wires for the intermediate connection of the plurality of temporary binding harnesses are bundled and welded by resistance welding with a resistance welding machine,
The present invention provides an intermediate waterproof connection method for electric wires, characterized in that the welded portion is filled with silicon, and then an adhesive sheet is wound around the outer peripheral surface of the silicon.

[0008] According to the above method, the electric wire from which the core wire for the intermediate connection has been peeled is temporarily bound, and this temporarily bound harness is connected to the wire of the other temporarily bound harness by a resistance welding machine on a wire harness assembly work table. If welded, the intermediate connection can be made in-line. The resistance welding machine may be mounted on a work table which is sequentially conveyed, or may be arranged so as to be positioned on the work table at a required stop position of the work table to be conveyed.

In addition, since silicon having a viscosity at normal temperature is filled into the welded portion using a tube or the like as a water stopping agent after the resistance welding, the water stopping agent can be filled on a work table. In addition, after filling and applying the water-stopping agent silicone, since it has a viscosity at room temperature, it is also possible to wind the pressure-sensitive adhesive sheet and package it. Thus, the electric wires can be connected to each other in an in-line operation on the work table. In addition, in the case of the terminal concentrated splice, a hardening time of the water stopping agent is required, and the working time cannot be reduced. However, according to the method of the present invention, this point can be improved and the working efficiency can be improved. Can be. In addition, compared to the case where a waterproof joint connector is used, there is no need to insert the terminals on the workbench, so that it is possible to prevent the occurrence of damage to the inserted terminals and the accompanying reduction in the electrical connection reliability.

[0010] Secondly, the present invention is characterized in that, in a plurality of electric wires, a core wire is exposed by peeling an insulating coating at an intermediate portion thereof,
These core wires are resistance-welded to each other, and the welded portion is embedded in silicon, and an adhesive sheet is wound around the silicon to surround the silicon. ing.

The intermediate waterproof connection structure of the electric wire may be formed by the method of the present invention or may be formed by another procedure.

With the above-mentioned intermediate connection structure, the amount of electric wires can be halved as compared with the case where terminal splicing is simply performed, and the cost and weight can be reduced from this point as well. Also, compared to the case where a joint connector is used, the number of parts can be significantly reduced, and the joint connector needs to be wound around the wire harness with a tape, so that the wire harness has a partially large diameter. However, in the intermediate waterproof connection structure of the present invention, the wire harness does not partially increase in diameter,
There is also an advantage that the wiring space for the wiring harness can be reduced.

[0013]

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

FIG. 1 shows an intermediate connection portion of a group of electric wires according to an embodiment of the present invention. Electric wires w1, w2, w3, w4
In the intermediate part, the insulating coating 10 is peeled off and the core wires 11 are exposed, and these four core wires 11 are welded to each other by resistance welding. Welded part 12 of these four core wires 11,
Silicon 13 serving as a water-stopping agent is filled and applied to the core wire 11 on both sides of the welded portion 12 and the tip portion of the insulating coating 10 continuous to both ends of the core wire, and the welded portion 12, the two-sided core wire 11 and The terminal portion of the insulating coating 10 is buried. Further, an adhesive sheet 14 is wound around the outer peripheral surface of the silicon 13 applied portion, so as to completely surround the silicon 13.

The electric wire w1 to be connected is an electric wire constituting the first temporary binding harness H1, the electric wire w2 is an electric wire constituting the second temporary binding harness H2, and the electric wire w3 is a third temporary binding harness H.
3 and the electric wire w4 are the fourth temporary binding harness H4.
Is an electric wire constituting

Next, a method of forming the intermediate waterproof connection structure shown in FIG. 1 will be described. First, as shown in FIG. 2 (A), terminals 16 of the electric wires w <b> 1 to w <b> 4 are crimp-connected to both ends thereof, and the insulating coating 10 is peeled off at a required intermediate position to expose the core wire 11. Then, as shown in FIG. 2 (B), both ends of the electric wire w1 are connected to the connector 17 together with the other electric wire w to form a first temporary binding harness H1.
Similarly, the other electric wires w2 to w4 form the second to fourth temporary binding harnesses H2 to H4 together with the other electric wires w, respectively.

The first to fourth temporary binding harnesses H1 to H4 incorporating the electric wires w1 to w4 in advance in this manner together with other temporary binding harnesses (not shown) are mounted on the wire harness assembly work table 20 shown in FIG. And unite the book. Workbench 2
In FIG. 0, wiring jigs (not shown) are provided upright at required locations, and are temporarily supported by these wiring jigs.
4 are wired in the designated wiring route.

At the time of the above wiring, the core wire 1 is used for intermediate connection.
The electric wires w <b> 1 to w <b> 4 exposing 1 are collected at the arrangement position P of the resistance welding machine 21. The resistance welding machine 21 is arranged at the required stop position of the work table 20 that is sequentially conveyed, on the far end side of the work table 20. Anvil 21 of resistance welding machine 21
a and the horn 21b are positioned on the work table 20, the core wires 11 of the electric wires w1 to w4 are placed on the anvil 21a, the horn 21b is lowered, and the core wires 11 are resistance-welded to each other to form a welding portion. 12 are formed.

After resistance welding with the resistance welding machine 21 in this manner, on the work table 20, as shown in FIG.
Silicon 13 is filled and applied from the filling tube 23 to the welded portion 12 and the core wire 11 on both sides, and further to the portion of the insulating coating 10 adjacent to the core wire 11, so that the welded portion 12 and the core wire 11 are completely embedded in the silicon 13. .

Next, as shown in FIG. 4 (B), on one surface of the vinyl chloride sheet 14a,
The adhesive sheet 14 coated with 4b is wound around the outer peripheral surface of the portion where the silicon 13 is applied. At this time, the side surfaces of the adhesive sheet 14 also include the electric wires w1 to w4 so as to completely surround the silion 13.
And wound around it in close contact with the insulating coating 11.

In the order described above, different temporary binding harnesses H
After wiring 1 to H4 on the worktable 20, all the intermediate connections (intermediate splices) of the electric wires w1 to w4 belonging to the temporary binding harnesses H1 to H4 are performed in-line on the worktable 20.

[0022]

As is apparent from the above description, according to the present invention, an intermediate waterproof connection structure between electric wires can be formed in-line at the time of final binding on a wire harness assembling work table. Therefore, the work efficiency can be dramatically improved as compared with the conventional terminal concentrated splice for offline work.

Also, compared to the terminal concentrated splice, the core wire exposed by peeling the middle of the wire is resistance-welded, so that the required number of wires can be simply halved, resulting in significant cost reduction and light weight. Can be achieved. Furthermore, in the case of using a joint connector, if the prevention specification is adopted, a waterproof connector having a complicated configuration is required, and the number of electric wires is increased similarly to the terminal concentrated splice. Can be all eliminated.

[Brief description of the drawings]

1A is a plan view, and FIG. 1B is a partially broken plan view.

FIGS. 2A and 2B are explanatory diagrams showing the procedure of the method of the present invention.

FIGS. 3A and 3B are explanatory views showing a state where resistance welding is performed on a work table.

FIGS. 4A and 4B are explanatory views showing the procedure of the method of the present invention.

FIG. 5 is a drawing showing a conventional example.

[Explanation of symbols]

 w1 to w4 Intermediately connected wires H1 to H4 Temporary binding harness 10 Insulation coating 11 Core wire 12 Welded part 13 Silicone 14 Adhesive tape 20 Wire harness assembly work table 21 Resistance welding machine

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H02G 3/22 H02G 3/22 A 3/38 15/08 K 15/08 H01B 13/00 513Z // H01B 13/00 513 H02G 3/28 FF term (reference) 5E085 BB01 CC03 DD03 GG03 GG12 GG27 HH11 HH15 JJ13 JJ38 5G355 AA03 BA02 BA11 CA15 CA19 CA26 5G363 AA01 BA02 CA06 DC02 5G375 AA02 BA26 BB45 CB55 CB03 DB04 CB03 DB04 CB55

Claims (3)

[Claims] 1. A terminal is connected to an end of an electric wire, and an insulating coating is peeled off at an intermediate portion of the electric wire to expose a core wire for an intermediate connection. The terminal connected to the terminal is connected to one connector to form a temporary binding harness, and the intermediate connection of the plurality of temporary binding harnesses is performed on a worktable on which a plurality of temporary binding harnesses are permanently bound to assemble a wire harness. The core wire is bundled and welded by resistance welding with a resistance welding machine, then the above-mentioned welded portion is filled with silicon, and then an adhesive sheet is wound around the outer peripheral surface of the silicon to surround it. Intermediate waterproof connection method for electric wires. 2. A plurality of electric wires, wherein an insulating coating is peeled off at an intermediate portion thereof to expose core wires, and these core wires are resistance-welded to each other, and this welded portion is embedded in silicon, An intermediate waterproof connection structure for electric wires, characterized in that an adhesive sheet is wound around the silicon and surrounded. 3. An intermediate waterproof connection structure for an electric wire formed by the method according to claim 1.