JPH0729420A - Wire harness and its manufacture - Google Patents

Abstract

PURPOSE:To easily select an electric wire to be jointed out of a plurality of wires in the binding process. CONSTITUTION:In a tentative process part of a plurality of wires cut in a specified length is remained as it is or arranged in the form of U turn, and the tip is made free and bundled to form a bundle of tentative bundled wires. In the binding process a plurality of the tentative bundles are layed along a specified path. Only the electric wire 1A, 1B, 1C, 1D made free at the portion where connection is made to a pressure contact connector 9 are selected and the connection is made to the connector 9. As a result, the electric wire to be jointed is jointed so that a wire harness is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness, and more particularly to a wire harness in which some electric wires are jointed in the middle of a route and a method for manufacturing the same.

[0002]

2. Description of the Related Art In some wire harnesses, a plurality of electric wires are laid along a predetermined path, and some electric wires are jointed by a pressure contact connector in the middle of the path.
The manufacturing process of this wire harness is as follows: First, each electric wire is cut into a predetermined size, and the cut plural electric wires are bundled to form a temporary binding wire bundle, and a plurality of temporary binding wires formed by the temporary binding step. This is performed by a main binding step of laying a wire bundle along a predetermined path, and then connecting some of the electric wires to a press-connecting connector and joining them in the middle of the path.

In the present binding step, it is necessary to select some of the electric wires to be jointed from a plurality of electric wires and joint them. As a general means, the coating color of the electric wire to be jointed is made different from other electric wires, and at the time of jointing, the coating color is selected. However, with such means, the work of selecting a desired electric wire from a plurality of electric wires that are mixed has been extremely troublesome.

Further, when joints are made at two or more places, it is necessary to make two or more kinds of coating colors for identification, but the coating colors are used not only for selection of joints but also as various other information. Since it has the meaning of "," not only is it necessary to use electric wires of various types of coating colors, but selection becomes even more troublesome.

In order to solve such a problem, an invention which does not depend on the coating color is disclosed in JP-A-63-259977. In this conventional invention, as shown in FIGS. 10 and 11, a press-connecting connector is used as a joint means, and a ring-shaped portion b is provided in advance at a joint portion of an electric wire a to be connected to the press-connecting connector. The electric wire a is selected by using b as a mark, and the ring-shaped portion b is press-fitted and connected to the press-connecting connector.

[0006]

However, in the invention shown in the conventional invention, since the ring-shaped portion b is provided in the middle of the electric wire, it is bundled together with a large number of electric wires for temporary binding or main binding. At that time, the wires are entangled with other electric wires, which hinders smooth temporary binding work and main binding work. In addition, there is a problem to be solved such as a new step of forming the ring-shaped portion b, which leads to a rise in manufacturing cost due to an increase in man-hours, and it is still possible to easily manufacture the wire harness. Didn't.

Therefore, in the invention of claim 1 or claim 2, a wire which can be easily selected from a large number of electric wires in the present binding step and can be jointed without requiring a new step. It is intended to provide a harness and a method for manufacturing the harness.

A third aspect of the present invention is intended to make the invention of the first aspect easier for a wire harness that is joined at a plurality of two or more locations.

[0009]

As a means for solving the above-mentioned problems, in the invention as set forth in claim 1, the electric wire connected to the press-connecting connector is folded back in a cut-off shape or a U-turn shape, and either one of them is returned. Wired only from the side.

Further, in the invention according to claim 2, in the temporary binding step, the electric wire connected to the press-connecting connector in the final binding step is folded back in a cut-off shape or a U-turn shape, and the tip portion thereof is arranged in a free state. In this bundling step, an electric wire whose tip is in a free state is selected from a plurality of electric wires arranged in the middle of the path, and the tip is connected to a pressure welding connector, and either one side Wire only from.

[0011]

According to the first aspect of the present invention, when selecting a part of the electric wire to be connected to and jointed to the press-connecting connector from the plurality of electric wires laid along the predetermined path, a plurality of electric wires are installed at the site where the press-connecting connector is installed. It is arranged so that the electric wire bundle formed by the electric wires of FIG. In this bundle of electric wires, the electric wires to be jointed are folded back in a cut-off shape or a U-turn shape and wired only from one direction, and the tip portion is in a free state. Therefore, the free electric wires are selected as a mark, and the tips of the selected electric wires are connected to the pressure welding connector. Thereby, the electric wire connected to the press-connecting connector is jointed to form a wire harness.

In the second aspect of the present invention, the plurality of electric wires cut into a predetermined length are bundled in the temporary binding step. At this time, a part of the electric wire connected to the press-connecting connector in the present binding step is cut into a length up to the joint, or is arranged so as to make a U-turn at that portion. This cut-off shape or U-turn shape can be performed without requiring a special step. In addition, in the present binding step, a plurality of temporary binding wire bundles are laid along a predetermined path. At this time, at the location to be connected to the press-connecting connector, the wire to be connected is wired from either one side in a cut-off or U-turn shape, and the tip is in a free state. Can be easily selected. Then, these selected electric wires are connected to the pressure contact connector. Thereby, the electric wires to be jointed are jointed to form a wire harness.

According to the third aspect of the invention, even with respect to the wire harness having a plurality of joint points, the wire harnesses are arranged so as to be cut off or U-turned at the joint points. If the wires are temporarily bundled, it is possible to select electric wires to be wired on only one side and joint them.

[0014]

According to the present invention, the electric wire connected to the press-connecting connector is folded back in a cut-off shape or a U-turn shape and wired only from one side, so that only the electric wire to be jointed can be easily selected. The work can be performed easily and reliably, and the wire harness can be easily manufactured.

[0015]

【Example】

<Embodiment 1> Hereinafter, Embodiment 1 will be described with reference to FIGS. 1 to 8 according to a manufacturing process of a wire harness W that constitutes a circuit shown in FIG.

<Temporary Bundling Step> It is designed in advance to have the circuit configuration shown in FIG. 3, and based on this, each electric wire 1 is cut into a predetermined length as shown in FIG. At this time, the electric wire 1a folded back in a U-turn shape is also cut into a predetermined length. The terminal fittings 8 are fixed to both ends of the cut electric wires 1 and 1a. At this time, with respect to the electric wire 1b, the terminal metal fitting 8 is fixed to only one end, and the other end is the cut-off end 10 which remains in the cut-off state. These wires 1, 1a, 1b
Connect the terminal fitting 8 of the predetermined connector housing 7 (7a, 7
b, 7c, 7d) to form a circuit as shown in FIG. At this time, the electric wire 1a is folded back in a U-turn shape and routed, and the folded-back portion has a folded-back end portion 1
1, and the cut-off end 10 of the electric wire 1b is cut off without being connected to any connector housing 7. Then, a temporary binding wire bundle 2 is formed by these electric wires 1, 1a, 1b.

As a result, the electric wire 1a folded back in a U-turn shape and the electric wire 1b cut off are laid from only one side in the temporary bundled wire bundle 2 arranged in the substantially left-right direction by the plurality of electric wires 1. The cut-off end portion 10 and the folded-back end portion 11 are in a mixed state in a free state at a predetermined portion.

Note that, for the sake of simplicity, FIGS.
In Fig. 3, three electric wires 1 are laid in parallel to the left and right, but in reality, a larger number of electric wires 1 are often laid. 1 and 2 illustrate an example of the temporary binding wire bundle 2. The temporary binding wire bundle 2 includes a length of each electric wire 1, a wiring state, a fixed state of the terminal fitting 8, and a connector of the terminal fitting 8. It is assumed that the manner of fitting into the housing 7 is individually set. For example, although each end of the electric wire 1a is fitted into the connector housings 7a and 7b, the same connector housing 7 is formed into a U-turn shape. There is also a temporary binding wire bundle 2 that is fitted.

The temporary binding wire bundle 2 of the first embodiment is different from the conventional temporary binding wire bundle in which the ring-shaped portion is formed, and there is no protruding portion in the middle of the wire bundle. Since there is almost no risk of entanglement, and an extra step such as forming a ring-shaped portion is unnecessary, the manufacturing cost is kept low.

<Temporary Bundling Step> Various temporary bundling wire bundles 2 formed as described above and in a predetermined wiring state are further partially bundled on the main bundling board 3 to form a predetermined circuit. Thus, the wire harness W shown in FIG. 3 is formed.

The wiring configuration of the wire harness W shown in FIG. 3 in the fully bound state is as described below.
That is, both ends of the trunk line portion 4 in which a plurality of electric wires are bundled in the left-right direction are branched into two wires, and branch line portions 5La, 5Lb, 5R.
a, 5Rb, one of the branched branch lines 5La, 5
The tip of Ra is further branched into two, and sub branch lines 6La and 6L
b, 6Ra, 6Rb. A connector housing 7 is connected to the tip of each branch line portion 5 and the tip of each sub branch line portion 6. Further, in the middle of the main line portion 4, one of the electric wires 1 of each temporary binding wire bundle 2 is connected and jointed to a common press-connecting connector 9 by means described later.

To form this wire harness W,
A temporary binding wire bundle 2 of four types and four bundles including one electric wire 1A, 1B, 1C, and 1D jointly connected to the press-connecting connector 9 is formed by binding the wires together. Hereinafter, for simplification of description, these electric wires 1A, which are arranged in the temporary binding wire bundle 2,
The description will focus on the installation state of 1B, 1C and 1D. The electric wire 1A shown in FIG. 4 is folded back in a U-turn shape in the temporary binding wire bundle 2 and both ends thereof are connected to a connector housing 7 (not shown). This electric wire 1A includes one sub branch line 6La on the left side of the figure, a branch line section 5La continuous to the sub branch line 6La, and
Along the left side portion of the main line portion 4 to the joint portion 9a (installation position of the press contact connector 9), the joint portion 9a is folded back here and again along the left side portion of the main line portion 4 and the branch line portion 5La to the other sub branch line portion 6Lb. 12 A of folding | returning edge parts are routed in the path | route along, ie, the joint part 9a.

The electric wire 1B shown in FIG. 5 is such that only one end thereof is connected to the connector housing 7 (not shown) and the cut-off end portion 13B is in the cut-off state. The branch line portion 5Lb on the left side of the drawing, Further, along the left side portion of the main line portion 4, the cut-off end portion 13B at the other end is located and arranged in the joint portion 9a.

The electric wire 1C shown in FIG. 6 has its both ends connected to the connector housing and is arranged along one of the sub-branch line portions 6Ra and 5Ra on the right side of the drawing.
Similar to the electric wire 1A shown in FIG. 4, the folded end 12C is located at the joint 9a, and U along the other sub branch line 6Rb is provided.
Routed in a turn-shaped route.

The electric wire 1D shown in FIG. 7 is connected to the connector housing only at one end thereof. The electric wire 1D is arranged along the branch line portion 5Rb on the right side of the drawing and the right side portion of the main line portion 4, and the other end is cut off. As in the case of the electric wire 1B shown in FIG. 5, the discharge end portion 13D is routed along the path of being positioned at the installation position of the press contact connector.

4 to 7, the folded-back end portions 12A and 12C and the cut-off end portions 13B and 13D are the main line portion 4.
Although it is shown projecting from each of the temporary binding wire bundles 2
It is routed with the tip free without protruding from other wires inside.

Four bundles of temporary binding wire bundles 2 arranged in this way
As shown in FIG. 8, the four electric wires 1A, 1B, 1C, and 1D included in the joint part 9a have folded end parts 12
A, 12C and cut-off end portions 13B, 13D are collectively located.

Next, at the joint portion 9a, the folded end portion 12A,
12C and the cut-off ends 13B and 13D are jointly connected to the press-connecting connector 9 so that the electric wires 1A, 1B, 1C and 1D are electrically connected to each other. For this purpose, a plurality of other electric wires (not shown in FIG. 8) that are not connected to the press-connecting connector 9 are routed in the joint portion 9a, which is an intermediate position of the main line portion 4, so as to pass right and left. Then, these electric wires should be connected to the insulation displacement connector 9 by the electric wires 1A, 1
Together with B, 1C and 1D, it is a bundle. Of the bundled wires, wires 1A, 1B, 1C, 1
Select D and connect it to the press-connecting connector 9,
Wires 1A, 1B, 1C, 1 to be connected to the pressure contact connector 9
D has a cut-off shape or a U-turn-back shape, and is wired only on either the left or right side, and cut-off end portion 13B,
13D and the folded-back end portions 12A and 12C are wired only on either the left or right side in the free state.
For this reason, the free wire in the bundle of wires can be easily distinguished from other wires, so that the work of selecting and taking out can be performed easily and surely, and these folded end portions 1
2A, 12C and the cut-off end portions 13B, 13D are press-fitted into the press-connecting connector 9. This allows the wires 1A, 1B, 1C,
The 1Ds are connected to each other so that they can be energized.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIG. The temporary binding wire bundle 2 of this Example 2
In 2, the two electric wires 2 out of the plurality of electric wires 21
1a and 21b are arranged in a U-turn shape, and the folded portions 23a and 23b of the electric wires 21a and 21b are respectively connected to two press-connecting connectors (not shown) installed at two different positions on the main line (not shown). It is designed to be connected separately.
Therefore, the wiring lengths of the electric wires 21a and 21b, that is, the positions of the folded portions 23a and 23b are appropriately set so as to correspond to the installation positions of the press-connecting connectors to be connected.
As a result, both of the electric wires 21a and 21b are used for the final binding.
It is possible to easily and surely determine which press-connecting connector should be connected to.

The present invention is not limited to the above-mentioned embodiment, but can be modified and implemented as follows, for example. (A) In the embodiment of FIG. 2, the case where the temporary bundled wire bundle 2 includes the electric wire 1b whose one end is cut off has been described, but it is also applicable to the case where the electric wire 1b which is cut off is not provided. You can (B) In the first and second embodiments, the case where the number of the pressure contact connectors 9 is one or two has been described.
It can also be applied when installing more than one insulation displacement connector. (C) Needless to say, the wiring of the main binding of the wire harness is not limited to that described in the first embodiment, and the present invention can be applied to wire harnesses of various wirings.

Besides, the present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a state in which a terminal fitting is fixed to the electric wire of Example 1.

FIG. 2 is a wiring diagram in which the terminal fittings of the electric wire of FIG. 1 are fitted into a connector housing and temporarily bound together.

[Fig. 3] Wiring diagram of the wire harness in the fully bound state

[Fig. 4] Wiring diagram of electric wires connected to the press-connecting connector at the time of main binding

[Fig. 5] Wiring diagram of electric wires connected to the pressure contact connector at the time of main binding

[Fig. 6] Wiring diagram of electric wires connected to the pressure contact connector at the time of main binding

[Fig. 7] Wiring diagram of electric wires connected to the pressure contact connector at the time of main binding

[Fig. 8] Overall wiring diagram of all electric wires connected to the insulation displacement connector at the time of main binding

FIG. 9 is a wiring diagram of the second embodiment in a temporary binding state.

FIG. 10 is a wiring diagram of a conventional wire harness.

FIG. 11 is an enlarged view of a ring portion of a conventional wire harness.

[Explanation of symbols]

 W ... Wire harness 1A, 1B, 1C, 1D ... Electric wire 4 ... Electric wire (main line part) 9 ... Press-connecting connector 12A, 12C ... Folded end 13B, 13D ... Cut end

Claims (3)

[Claims] 1. A wire harness in which a part of the electric wires of a plurality of electric wires laid along a predetermined path are jointed by a press-connecting connector in the middle of the path, wherein the electric wire connected to the press-connecting connector is A wire harness that is folded back in a cut-off shape or a U-turn shape and wired only from one side. 2. A temporary binding step of bundling a plurality of electric wires to form a temporary binding wire bundle, a plurality of temporary binding wire bundles formed in the temporary binding step are laid along a predetermined path, and further in the middle of the path. In the method of manufacturing a wire harness, which comprises a main binding step of connecting some of the electric wires to a press-connecting connector, in the temporary binding step, the electric wires connected to the press-connecting connector in the main binding step are folded back in a cut-off shape or a U-turn shape. The free end of the wire, and in the main binding step, an electric wire whose free end is in the free state is selected from a plurality of electric wires arranged in the middle of the path. A method for manufacturing a wire harness, in which a tip portion is connected to a pressure contact connector and wiring is performed only from one side. 3. A press-connecting connector is provided at a plurality of points in a path, and an electric wire connected to each press-connecting connector is folded back in a cut-off shape or a U-turn shape at a position where each press-connecting connector is provided. The wire harness according to claim 1, wherein the wire harness is wired only from one side.