JPH0371742B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention [Field of Industrial Application] The present invention relates to a wire connection structure and a connection method for a pressure welding connector in a wire harness.

[Conventional technology]

The manufacturing process of wire harnesses used for wiring automotive electrical circuits can be roughly divided into the following four steps.

(1) The process of cutting electric wires to a predetermined length using an automatic machine and connecting terminal fittings to both ends of the electric wires. (2) The process of cutting electric wires with terminals and attaching terminals to them on a wiring board. (3) A jointing process in which predetermined electric wires are jointed (branch connection) using pressure welding connectors; (4) Electric wires are individually connected by wrapping tape, etc. Steps (2) to (4) of converging electric wires according to a route are mainly performed manually.

A wire harness W formed of a plurality of electric wires made in the electric wire cutting terminal attaching process is shown in FIGS. 8a and b.
As shown in FIG. 2, the wire 1 which requires a joint by a pressure welding connector and the wire 2 which does not require a joint are included in the same state. 3 is a terminal fitting, and 4 is its connector housing.

FIG. 9 shows the process of wiring the electric wires, in which the electric wires 1 and 2 groups are routed along the fork pins 6 on the wiring stand 5. The fork pins 6 are arranged in advance to form a predetermined path depending on the arrangement of electrical components of the automobile. The wire 1 that requires a joint is the 10th
As shown in the figure, it is set on the press-contact connector 8 on the connector mounting table 7, and the press-contact connection is made.

As shown in FIG. 11, the pressure contact connector 8 consists of a pressure contact terminal 9, a housing 10, and a cover 11. The pressure contact terminal 9 has a plurality of slots 9a arranged in parallel on the top of a conductive plate bent into an inverted U shape.
Wire holding grooves 10a corresponding to the slots 9a are formed on both longitudinal walls of the housing 10,
Further, a protrusion (not shown) for pressing an electric wire is provided on the inner surface of the cover 11. 11a is a locking claw,
10b is a locking hole that engages with the lock pawl 11a.

Thus, the joint of the electric wire 1 by the pressure connector 8 is first secured (set) by passing the electric wire through the slot 9a and the wire holding grooves 10a on both sides using both hands, and then putting the cover 11 on and applying strong pressure.
The electric wire 1 is press-fitted into the slot 9a by the protrusion (FIG. 12).

[Problem that the invention seeks to solve]

When jointing electric wires using the conventional technology, in the wire harness W (Fig. 8), electric wires 1 that require a joint and electric wires 2 that do not require a joint coexist, so it is not easy to identify them. Even if the wires are separated by color, it is extremely troublesome to select them from a large number of wires.

In addition, as shown in Fig. 10, the electric wire 1 is set in the insulation displacement connector 8 while passing it around the two fork pins 6, 6, but if one wire is routed in a slack state R, the other wire becomes short and does not fit properly. This makes it difficult to locate the set and requires skill.

Furthermore, since the pressure welding connector 8 must be set by pulling it with both hands, the work efficiency is poor, and there is a risk that the wire will not engage sufficiently with the wire holding groove 10a, etc., and may come off.

For this reason, in the manufacture of wire harnesses, there has been a need to develop a technology that allows easy selection of wires, positioning of crimp points, and setting of wires when jointing wires with crimp connectors.

An object of the present invention is to provide a wire connection structure and a connection method for a press-contact connector in a wire harness that meets these demands.

Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the wire connection structure of the insulation displacement connector in the wire harness of the present invention includes a insulation displacement connector having a insulation displacement terminal having a slot, The electric wire has a ring shape, and the ring shape of the electric wire is inserted into the pressure contact connector, and a part of the ring shape is press-fitted into the slot.

In addition, the wire connection method is to route multiple wires with terminal fittings connected to both ends along a predetermined route, and then set a specific wire selected from these wires in a pressure welding connector and joint it. The pressure welding portion of the electric wire to be jointed is bent to form a ring shape, the base of the ring is wrapped with tape, fixed by known means such as a synthetic resin clip, and the ring shape is inserted into the pressure welding connector to connect the wire to the pressure welding connector. It is characterized by being set to .

Although it is possible to appropriately form the ring shape manually, it is also within the scope of the present invention to provide a curl guide of a predetermined size on the workbench in advance and bend the ring along this guide.

〔Example〕

Hereinafter, the structure of the present invention will be specifically explained with reference to drawings showing embodiments, and the same reference numerals are used for the same components as in the conventional example.

FIGS. 1a and 1b show the wire harness, and FIG. 2 shows a partially enlarged view thereof. Among the groups of electric wires 1 and 2 constituting the wire harness W, the electric wire 1 which requires a joint has a ring shape 12 formed therein, and its base is fixed with a tape winding 13. This ring shape 12 has a pressure welding position determined in advance during or before and after the cutting terminal attachment process of the electric wire, and this part is formed by a plurality of locking pins 15 protruding in a circular shape from the workbench 14 as shown in FIG. 3A. It is formed by bending along a curl guide such as an Ω-shaped ring shape 15' having a notch 15a' in the neck as shown in FIG. 3B. The ring shape may be formed at the end of the electric wire 1' as shown in FIG. 4. In this case, the ring shape 12' is insulated by wrapping the cut end of the electric wire in tape 13.

FIG. 5 shows the process of wiring the electric wires. The electric wire 1 having a ring shape 12 or 12' and the electric wire 2 having no ring shape are routed along the fork pins 6 of the wiring stand 5 so as to form a predetermined route as before.

When wiring, if the wire has a ring shape 12, by extrapolating the ring shape 12 to the pressure welding connector 8 on the connector mounting table 7, you can prevent slack from occurring on one side of the wire or insufficient length on the other side. It can be prevented.

As shown in FIG. 6, the joint between the electric wire 1 and the pressure welding connector 8 is made by passing the ring 12 that is hung on the housing 10 between the slot 9a of the pressure contact terminal 9 and the wire holding grooves 10a on both sides, and then attaching the base of the ring. When pulled strongly downward, the insulation coating of the electric wire 1 is slightly bitten into the slot 9a, and at the same time, the electric wire 1 is inserted into the wire holding groove 10.
It is pulled in and locked into the set state.

After all the electric wires 1 to be jointed are set in the pressure welding connector 8, they can be press-fitted into the slots 9a using a jig (not shown), or the cover 11 can be crowned and locked (locking claws 11a, locking holes). At the same time as step 10b), the wire is press-fitted using the projection for pressing the wire. Note that two or more electric wires may be jointed in one slot 9a in an overlapping manner, thereby suppressing the increase in size of the pressure contact connector.

FIG. 7 shows the circuit of the insulation displacement connector 8 to which electric wires are connected as described above.
A book electric wire 1 is jointed.

In FIG. 5, only one insulation displacement connector 8 is shown, but when a plurality of insulation displacement connectors are used in one wire harness, the insulation coating of the electric wire is black, white, or red depending on the number of insulation displacement connectors. By color-coding the connections, you will not make mistakes when making connections.

[Effect]

Even if there are a large number of wires constituting a wire harness, the wires 1 to be joined by the pressure connector 8 have ring shapes 12 and 12', so that they can be easily distinguished from other wires 2 and can be selected very easily. I can do it.

Further, since the joint location of the electric wire 1 is predefined by the ring shape 12, there is no possibility of erroneous positioning.

Furthermore, when setting (primary locking) the electric wire 1 to the pressure connector 8, hold the housing 9 with one hand and pull the base of the ring 12 with the other hand to apply a strong force. You can do it easily and reliably.

Effects of the Invention As explained above, according to the wire connection structure and connection method of the insulation displacement connector in the wire harness of the present invention, selection of wires to be jointed,
Accurate positioning and setting into a pressure welding connector are extremely easy, and productivity of wire harnesses can be greatly improved.

[Brief explanation of drawings]

FIGS. 1a, b to 7 show embodiments of the present invention, and FIGS. 1a, b are explanatory diagrams showing the configuration of a wire harness according to a wire connection method of a pressure welding connector in a wire harness, and FIG. is the first
Enlarged explanatory diagram of the ring-shaped part of the electric wire 1 in the figure, 3rd
Figures a and b are explanatory diagrams of the ring-shaped forming method in Figure 2, Figure 4 is an explanatory diagram of another ring-shaped forming method, and Figure 5 is an explanatory diagram of the wiring harness wiring process in Figure 1. , FIG. 6 is a perspective view showing the wire connection structure of the insulation displacement connector in the wire harness, and FIG. 7 is an internal circuit diagram of the insulation displacement connector in FIG. 6. Figures 8a, b to 12 show conventional examples, Figures 8a and b are explanatory diagrams showing the configuration of the wire harness, respectively, and Figure 9 is an explanation of the wire wiring process of the wire harness in Figure 8. Fig. 10 is a partially enlarged explanatory view of Fig. 9, Fig. 11
The figure is a perspective view showing the wire connection structure of the pressure welding connector.
FIG. 12 is an explanatory diagram showing the process of pressure-welding the electric wires in FIG. 11. W... Wire harness, 1, 2... Electric wire, 8... Pressure contact connector, 9... Pressure contact terminal, 9a... Slot, 1
0... Housing, 10a... Wire clamping groove, 11... Cover, 12, 12'... Ring shape, 13... Tape winding.

Claims (1)

[Scope of Claims] 1. A pressure welding connector equipped with a pressure welding terminal having a slot, and an electric wire having a ring shape formed at a desired position, the ring shape of the electric wire being inserted into the pressure contact connector, and a part of the ring shape being inserted. An electric wire connection structure of a pressure welding connector in a wire harness, characterized in that it is press-fitted into the slot. 2. When a plurality of electric wires with terminal fittings connected to both ends are routed along a predetermined route and a specific electric wire selected from these wires is set in a pressure welding connector and jointed, the pressure welding of the wires to be jointed is performed. A method for connecting wires to a pressure welding connector in a wire harness, comprising: bending a portion to form a ring shape, fixing the base of the ring shape, inserting the ring shape into the pressure welding connector, and setting the wires in the pressure welding connector. 3. When a plurality of electric wires with terminal fittings connected to both ends are routed along a predetermined route and a specific electric wire selected from these wires is set in a pressure welding connector and jointed, the pressure welding of the wires to be jointed is performed. A wire characterized in that a portion is bent along a curl guide provided on a workbench to form a ring shape, the root of the ring shape is fixed, the ring shape is inserted into the pressure welding connector, and the electric wire is set in the pressure welding connector. How to connect wires with insulation displacement connectors in harnesses. 4. The wire connection method of a press-contact connector in a wire harness according to claim 3, wherein the curl guide is a plurality of locking pins protruding from a workbench in a circular shape. 5. The method of connecting electric wires of a press-contact connector in a wire harness according to claim 3, in which the curl guide is an Ω-shaped ring having a notch in its neck on a workbench.