JPH0711926B2 - Wire harness exterior tape winding method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing a wire harness for an automobile, and particularly to a method for manufacturing a wire harness in a tape winding step of winding and finishing with a vinyl tape in the manufacturing process. It is about.

[Prior Art] A wire harness is made by laying a plurality of electric wires, each of which has an electric connector fixed to the end portion of the electric wire cut into a predetermined length, on an assembly drawing board and winding it with a vinyl tape to bundle it. Is. Therefore, the vinyl tape needs to be tightly wound around the wire bundle in order to adjust the shape, such as the size, branching position, and direction of the wire bundle.

[Problems to be Solved by the Invention] The number of electric wires in a wire harness for automobiles has increased dramatically as automobile electronics have progressed along with improvements in automobile comfort, safety and driving performance. And weight reduction are required. For this reason, the number of electric wires to be wound around the tape increases, the wire harness itself becomes hard, and if it is forcibly bent, the part is bent and bent, which hinders the wire harness packaging work and automobile assembly work.

Therefore, in order to solve the above problems, the present invention proposes a method for maintaining the flexibility of a wire harness by providing an extra space portion in the wire bundle in the winding tape winding of the wire harness.

[Means for Solving Problems] An outer tape winding method for a wire harness according to the present invention is a wire laying operation for manufacturing a wire harness, in which a tape winding designation is made substantially at the center of an electric wire bundle having a tape winding designation section. Install a rod-shaped jig that is longer than the section and has a substantially circular cross-section along the flow direction of the wire wiring.In this state, tape-wrap the outer circumference of the wire bundle and then remove the rod-shaped jig to remove the wire bundle. An extra space is provided approximately at the center.

That is, in this method, after finishing wiring individual wires on the assembly drawing board, the jig is inserted almost at the center of the wire bundle, the wires are gathered evenly around the jig, and tape is applied from above the wire bundle. After winding the same as in the conventional method, the jig is pulled out and the relevant part is loosened several times to make the finish of the wire harness flexible.

[Operation] The wire harness exterior tape winding method of the present invention provides a spare space for the wire bundle by inserting the jig into the wire bundle, winding the tape from above, and then removing the jig. Set up.

As a result, the outermost layer of the wire bundle is firmly adhered to and fixed by the tape, but the wire group of the inner layer is provided with the extra space, so that the respective wires are free to move, especially in the longitudinal direction. It is ready to move in the direction parallel to the wire.
By loosening this wire harness several times, the electric wire inside the tape can be loosened while ensuring the adhesion between the tapes.

[Example] A specific example of the method for winding the exterior tape of the wire harness of the present invention will be described with reference to FIG.

There are a plurality of assembly jigs 3 set on the assembly drawing board 1, and the rod-shaped jig 5 is previously assembled between the assembly jig 3a and the assembly jig 3b having the tape winding designated section. It is placed so as to straddle the tool 3b, and in this state, a plurality of electric wires with the electrical connection tool 2 are laid.

After the wiring is completed, as shown in FIG. 2, the rod-shaped jig 5 is set at the center of the electric wire bundle, and the electric wire is put around the outside of the rod-shaped jig 5, and the electric wire bundle 4 is attached together with the rod-shaped jig 5. Keep the cross section substantially circular. The adhesive vinyl tape 6 is wound around the outer circumference of the substantially cylindrical wire bundle 4 except for the jig gripping portion 5a provided at one end of the rod-shaped jig 5.

After the vinyl tape 6 has been wound, the jig 5 is pulled out in the direction of arrow A while holding the grip portion 5a of the rod-shaped jig 5 and twisting the jig 5 to facilitate pulling out. By loosening the wire harness several times, the adhesiveness between the tapes is secured, and the outer layer portion of the wire bundle 4 that is in close contact with the tapes becomes a tight array without any gaps, as shown in FIG. Since the extra space portion 7 is formed in the inner layer portion, the arrangement has a degree of freedom.

This allows the wire harness to be finished as if the tape had been wound loosely, making the wire harness flexible.

The rod-shaped jig 5 is a simple one as shown in FIGS. 4 to 5, but the rod-shaped jig 5 is installed on the wire bundle 4 which has been wired on the drawing board of the assembly drawing board 1. 5 jig tip 5c
Is provided with a roundness to the extent that the wire is not damaged.

Then, in order to improve the drawability of the jig after winding the vinyl tape, a lubricant is applied to the jig, a slight taper is provided on the jig insertion portion 5b, and the jig shown in FIG. The jig itself is provided with an angle like the grip portion 5a. There is also a method in which the jig insertion portion 5b is provided with an annular concave-convex portion 8 as shown in FIG. 6 so as to reduce the frictional resistance with the electric wire. The rod-shaped jig 5 as shown in FIG. 8 includes a jig grip portion 5a and a jig insertion portion.
5b and T have a T shape, and the annular concave and convex portion 8 of the jig insertion portion 5b is formed.
It is possible to devise a spiral type.

The length and thickness of the jig may be set according to the size of the wire harness, and the shape and shape of the round bar / square bar as shown in FIG. Good.

[Advantages of the Invention] Inserting a jig into a plurality of electric wires, winding the tape over the electric wire bundle, then pulling out the jig and loosening it several times to ensure adhesion between the tapes. On the other hand, the wire group in which the tape is wound freely moves, which makes the wire harness flexible.

Since the jig is inserted, the tape winding force can be as fast and tight as in the conventional method, and the jig can be easily pulled out from the bundle of wires that has been wrapped with the gripping part. Yes, the efficiency of tape winding work is the same as before.

By winding the tape of the wire harness according to the present invention, the wire harness has flexibility and can be bent even with some bending by a simple work of inserting a simple rod-shaped jig into the wire bundle and then pulling it out. It is possible to obtain an effect that it can be easily bent at the time of packing work, and the bending returns to normal at the time of assembling into an automobile, and the assembling work is not hindered.

Also, by changing the shape of the rod-shaped jig according to the type and shape of the wire bundle, it is possible to artificially provide a spare space of any size, and it is possible to change the flexibility.

[Brief description of drawings]

FIG. 1 is a schematic view showing a manufacturing method of the present invention, FIG. 2 is a sectional view of an electric wire bundle showing a state where a jig is inserted after winding the tape, and FIG. FIG. 4 is a front view of a rod-shaped jig having a tapered portion, FIG. 5 is a front view of a rod-shaped jig having a grip portion, and FIG. 6 is an annular irregularity of an insertion portion. FIG. 7 is a sectional view of the rod-shaped jig showing the shape of the portion, FIG. 7 is a cross-sectional view of the rod-shaped jig, FIG. 8 is a T-shape, and a front view of the rod-shaped jig in which the annular uneven portion of the jig insertion portion has a spiral shape. 1 …… Assembly drawing board, 2 …… Electrical connector, 3 …… Assembly jig, 4 ……
Wire bundle, 5 …… Bar jig, 6 …… Tape, 7 …… Space area, 8
... Ring-shaped irregularities

Claims (2)

[Claims] 1. In a wire laying operation for manufacturing a wire harness, a bar-shaped jig 5 having a substantially circular cross-section with a dimension longer than the tape winding designated section is provided substantially at the center of the wire bundle 4 having the tape winding designated section. , The wire is installed along the flow direction of the electric wire, and in this state, tape winding is performed on the outer circumference of the electric wire bundle 4 except for the jig gripping portion 5a provided on the stick-shaped jig 5 on the outer circumference of the electric wire bundle 4, and then the rod shape. A method for winding an exterior tape of a wire harness, characterized in that the jig 5 is pulled out and an extra space is provided substantially in the center of the wire bundle 4. 2. The method for winding an exterior tape of a wire harness according to claim 1, wherein the rod-shaped jig 5 is provided with an annular uneven portion on the surface thereof.