JPH01183004A - Wire harness and its manufacture - Google Patents

Abstract

PURPOSE:To easily make a wire harness whose curvature shape is accurate by covering a wire bundle curved part with sheet including setting resin through a jig and hardening it. CONSTITUTION:The curved part of a wire bundle 7 is covered with one sheet 10 including setting resin which are laid on a jig 9, and if the sheet 10 is thermo- set in this condition, a wire harness accurate in the shape of the curved part 4 can be made easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a wire harness used, for example, as wiring for an automobile, and a method for manufacturing the same.

(Prior Art) In the electrical system of an automobile, all wiring from the battery to each electrical component is connected, and a unit of an octopus-shaped wire bundle is manufactured at a parts factory, and this is called a wire harness.

FIG. 6 is an explanatory perspective view showing the manufacturing of an automobile wire harness.

A large number of pins 2 are set up at predetermined positions on the wiring board 1.
A wire harness 3 consisting of a bundle of many electric wires is stretched between these bins 2.

This wire harness 3 has various bent portions 4.about.4- along the way, branched branch wires 5, and a connector 6 at the tip thereof.

This wire harness varies depending on the car model, for example.
The length, bending position and shape, length of the branch wire, etc. are determined, and after all are completed, it is wired to the chassis of the car.

However, in reality, this wire harness is often passed through gaps between automobile parts or bent along the shape of the parts, so a much more complex shape than the one shown in Fig. 6 is required. Also, if the wire bundle is thick, it is necessary to bend it into a predetermined shape and fix it in advance.

A conventional method for bending and flattening a wire harness into a predetermined shape is to wind it with a tape containing heat or ultraviolet curable resin, form it into the desired shape, and then harden it (Japanese Patent Application Laid-Open No. 59-1991) -127317).

Figures 7 and 8 show deformed parts of a conventional wire harness, and Figure 7 shows a large number of wire bundles 7 wound into a flat bent shape with a curable tape 8, and then hardened with heat or ultraviolet rays. FIG. 8 shows a flattened image in the same manner.

(Problems to be Solved by the Invention) As mentioned above, the bent portion of a conventional wire harness is made by wrapping a tape containing a curable resin, bending it into a desired shape, and then curing it. However, tape coated or impregnated with a curable resin (prepreg tape) is sticky, so winding it around a bundle of wires is extremely inefficient. Dimensional accuracy decreases due to misalignment,
It was difficult to create a bend at an accurate angle.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art and provide a wire harness having a bent portion with an accurate shape, and a method for easily manufacturing the wire harness.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention provides a wire harness in which a bundle of wires made up of a plurality of wires is bent into a predetermined shape. It is characterized by being coated and cured with a single sheet containing a curable resin, and its manufacturing method involves applying a sheet prepreg containing a curable resin to a gutter-like jig bent into a predetermined shape. The prepreg is characterized in that, after a wire bundle is passed through the prepreg, heat or ultraviolet rays are irradiated to harden the prepreg into a predetermined shape.

(Function) The sheet-like prepreg of the present invention is placed in a gutter-like jig with a predetermined shape, so that it bends according to the shape of the jig, wraps around the wire bundle placed on it, and hardens in that shape. be done. Since this prepreg is a single sheet, there is no need for tape winding, and when it is cured, it precisely matches the shape of the jig, providing high-precision J-method stability.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIGS. 1 to 5 show embodiments of the present invention, and FIGS. 1 to 5 are explanatory perspective views sequentially showing the manufacturing process of the bent portion of the wire harness of the present invention.

First, a gutter-shaped jig 9 and a prepreg sheet 10 containing a curable resin are prepared (FIG. 1).

Although the jig 9 is made of transparent plastic in this example,
It doesn't necessarily have to be transparent. If the covering cured resin described later is thermosetting, it is necessary to use a material that does not deform at the curing temperature. In that sense, it may be made of metal.

However, when curing with ultraviolet rays, radiation, electron beams, etc., there is no need to consider thermal deformation of the jig.

The shape of the jig is determined by the purpose of the harness, specifically the type of car, and where the bending part will be placed on the car. Therefore, use the desired thickness, angle, etc.
In addition, a presser is used to flatten it.

The prepreg sheet 10 is made of ordinary cloth coated with resin or impregnated with resin liquid, etc., and cut into an appropriate size, and if necessary, cuts 11 are made to make it easier to bend. The resin is cured by heat (infrared rays), ultraviolet rays, radiation, electron beams, etc., and epoxy-based or unsaturated polyester-based resins are usually used.

Next, prepreg sheet 10 is spread along the inner wall of jig 9 (FIG. 2). Since the prepreg sheet 10 is flexible,
Follow the pattern of jig 9.

Next, the wire bundle 7 is put into the prepreg sheet 10 (
Figure 3).

Thereafter, the prepreg sheet 10 is placed over one part of the wire bundle 7 to completely surround it. Then, apply sufficient treatment to harden the resin (for example, in the case of thermosetting resin, use a hot gun
) to cure the prepreg sheet (not shown).

The bent portion 4 taken out from the jig is accurately fixed in the desired shape (FIG. 5).

The above-mentioned work can also be carried out by fixing the jig 9 on the wiring board 1 shown in Fig. 6, or by manufacturing only the bent part at the location shown in Figure 6, and attaching it to the pin 2 of the wiring board. It is also possible to bring the wire harness to the factory and manufacture the entire wiring harness.

The wire harness of the present invention has one or more of the above-mentioned bent portions, and the number, size, shape, etc. thereof are not limited.

[Effect of the invention] Since the present invention has the above-described configuration, it has the following effects.

(+) Since it has a bent part fixed to one hardened sheet 1, the dimensional accuracy is high and the arrangement of the car chassis 1 can be performed accurately.

(2) Work efficiency is improved because there is no need to wind the tape.

[Brief explanation of the drawing]

1 to 5 are explanatory perspective views explaining the manufacturing process of the wire harness bent portion of the present invention, FIG. 6 is an overall perspective view of the wire harness, and FIGS. 7 to 8 are conventional wire harness bent portions. FIG. 1...Wiring board 2...Bin 3...Wire harness 4...Bending portion 7...Wire bundle 8...Tape 9...Jig 10...Sheet agent Patent attorney Yasuo Miyoshi 1...Cloth'
S 叛□□□□-J 1st Country Figure 2 Figure 3 Figure 4 Figure 45 Figure

Claims (1)

[Claims] (1) A wire harness in which a wire bundle made up of a plurality of wires is bent into a predetermined shape, in which the bent portion of the wire bundle is coated and hardened with a sheet containing a curable resin. Harness. (2) When manufacturing a wire harness in which a wire bundle made up of multiple wires is bent into a predetermined shape, a sheet-like prepreg containing a curable resin is placed in a tub-shaped jig bent into a predetermined shape. A method for manufacturing a wire harness, which comprises passing a wire bundle through the prepreg and then curing the prepreg into a predetermined shape by irradiating heat or ultraviolet rays.