JPH117856A - Outer casing structure of wire harness with protecting material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outer casing excellent in durability with high mounting strength. SOLUTION: A flexible protecting material 1 consisting of a vinyl chloride sheet is mounted on the circumference of a wire harness W/H by welding. The protecting material 1 is formed by cutting a sheet material into a proper length, winding it on the circumference of a wire group constituting the wire harness W/H, superposing the excessive parts on both axial sides in mutually stuck state, arranging the resulting overlapped part 1a in the connecting part of a heat welding machine followed by pressing and overheating, thereby welding and integrating the superposed part 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exterior structure of a protective material on a wire harness, and more particularly, to an improvement in the strength of attaching the protective material to the wire harness.

[0002]

2. Description of the Related Art A wire harness arranged in an automobile is formed by bundling a large number of electric wires, and its outer periphery is covered with a protective material in order to prevent damage due to an external load. The protection material is provided with locking projections and locking recesses at both ends in the width direction, and these are locked to be attached to a wire harness (Japanese Utility Model Laid-Open No. 5-48140, Japanese Utility Model Laid-Open No. 5-37603).
No.), or by attaching both ends in the width direction in a laminated manner and bonding them. In the case in which the locking protrusion and the locking recess are provided at both ends in the width direction of the protective material, when the wire harness is bent, the locking protrusion may come off from the locking recess, and the wire harness The bonding strength of the above-mentioned protective material is higher as to the strength of attachment to the protective material.

[0005] As shown in FIG. 5, the protective material 8 is formed by applying an adhesive material in a strip shape to a surplus portion at the lower end in the width direction of a strip-shaped sheet and covering the same with a release paper 9.

The protection member 8 is attached to the wire harness W / H by first holding the wire harness W / H with a U-shaped receiver 10 fixed to a wiring board (not shown), and then performing manual operation. Protective material 8 along the longitudinal direction of wire harness W / H
And peeling off the release paper 9, winding the excess paper at one end and superimposing the excess part at the other end in a laminated manner, and pressing the excess part to attach it.

[0005]

However, since the work of bonding one end of the protective member 8 to the bonding portion at the other end is a manual operation, it is difficult to apply a pressing force uniformly over the entire surface of the bonding portion 8a. As a result, as shown in FIG. 6, there is a case where the above-mentioned pressing force is weak and a gap 11 in which the other end is not partially adhered to one end is generated. In such a case, it is easy for other adhesive portions to be peeled off from the gap 11. For example, when the wire harness W / H is bent, the entire bonded portion 8 a is easily peeled from the gap 11. This may cause the protection member 8 to be detached from the wire harness W / H, resulting in poor durability.

As shown in FIG. 7, the protective member 8 is spirally wound with the adhesive portion 8a being covered with a release paper 9, and may be attached to the wire harness W / H as required. Is cut to the length, but the bonding portion 8a by the release paper 9 is used.
Due to its thickness, the shape becomes substantially conical, so that extra space is required and handling such as storage is very difficult.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an exterior structure of a protective material for a wire harness which has high attachment strength and excellent durability.

[0008]

According to the present invention, there is provided a wire harness protection material for protecting a wire harness by wrapping the protection material around an outer periphery of a group of wires constituting the wire harness. A sheet material having flexibility is wrapped around the outer periphery of a group of electric wires constituting a wire harness, and the surplus portions on both sides in the width direction are laminated in a laminated manner, and the overlapped portions are welded by a heat welding machine. It provides the exterior structure of the protective material to the harness.

According to the above construction, the surplus portions of the sheet material are laminated in a laminated manner, and the overlapped portions are welded by a heat welding machine, instead of the conventional manual bonding.
By this welding, a stronger attachment strength than conventional bonding is obtained, and the durability is excellent. In addition, since a pressing force is uniformly applied to the welded portion by the heat welding machine, no gap is formed in the welded portion unlike the related art, and a high attachment strength against bending of a wire harness or the like. And excellent durability.

According to a second aspect of the present invention, there is provided a wire harness protective material for protecting a wire harness by wrapping the protective material around an outer periphery of a wire group constituting the wire harness,

[0011] A flexible sheet material is wound around the outer periphery of a group of electric wires constituting the wire harness, and the surplus portions on both sides in the width direction are overlapped in a laminating manner, and the overlapped portion is stapled to a wire harness. The outer structure of the protective material is provided.

According to the above configuration, the surplus portions of the sheet material are stacked in a laminated state, and the above-mentioned overlapped portions are stapled instead of being bonded by the conventional adhesive. The staple stop provides a stronger attachment strength than conventional bonding and is excellent in durability. In addition, by appropriately adjusting the interval of the stop by the staple, a high attachment strength and an excellent durability can be obtained even when the wire harness is bent.

It is preferable to use a vinyl chloride sheet as the sheet material. The vinyl chloride sheet can be easily welded, staples can be easily stopped, and the work of attaching to the wire harness becomes easy.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment, in which a flexible protective material 1 made of a vinyl chloride sheet (heat-resistant temperature 100 ° C., melting temperature 180 ° C.) is attached to the outer periphery of a wire harness W / H by welding.

In the first embodiment, as shown in FIG. 1, a protective member 1 is attached to the outer periphery of the wire harness W / H by welding. The protective material 1 is made of a vinyl chloride sheet and has flexibility.

The protective material 1 is obtained by cutting the sheet material 7 to an appropriate length, winding the sheet material 7 around the outer periphery of a group of wires constituting the wire harness W / H, and laminating the surplus portions on both sides in the width direction in a laminated manner. The overlapped portion 1a is attached to a heat welding machine 2 shown in FIG.
Are placed on the thermocompression bonding portion 2a, and the overlapped portion 1a is welded and integrated by applying pressure and heating.

[0017] By being fused and integrated as described above,
Stronger attachment strength than conventional bonding is obtained, and durability is excellent. Since a pressing force is uniformly applied to the overlapped portion 1a by the heat welding machine, no gap is formed in the overlapped portion 1a unlike the related art, and the wire harness W / H is bent. Also high mounting strength and excellent durability are obtained.

FIG. 3 shows a second embodiment, in which a staple (a so-called stapler needle) 3 is used to wire harness W.
/ H, a flexible protective material 4 made of a vinyl chloride sheet is attached.

The protective member 4 is wound around the outer periphery of a group of electric wires constituting the wire harness W / H held by the U-shaped receiving member 5, and the excess portions on both sides in the width direction are laminated in a laminated manner, and then the laminated. As shown in FIG. 3B, the portion 4a is stapled using a stapler (so-called stapler) 6.
Stop with

By fixing with the metallic staples 3 in this manner, a stronger attachment strength is obtained than in the conventional bonding, and the durability is excellent. By appropriately adjusting the interval of the stop by the staple 3, the wire harness W /
High mounting strength and excellent durability can be obtained even for bending of H or the like.

In the first and second embodiments, the protection members 1 and 4 are attached to the wire harness W / H without using an adhesive. This eliminates the need to provide a release sheet at one end in the width direction of the sheet material as in the related art. Therefore, as shown in FIG. 4, even if the sheet material 7 is spirally wound by storage or the like, the sheet material 7 has a cylindrical shape and does not take up extra space as in the conventional case, so that it is easy to handle, and the total length is the same in the conventional space. Long sheet material 7 can be spirally wound.

[0022]

As is apparent from the above description, according to the exterior structure of the protective material on the wire harness of the present invention, the conventional adhesive is attached to the outer periphery of the wire harness by welding or stapling. Higher mounting strength is obtained and the durability is excellent.

In the above-mentioned attachment by welding, no gap is formed in the welded portion as in the prior art, and high attachment strength and excellent durability can be obtained against bending of the wire harness and the like. In addition, in installation by stapling,
By appropriately adjusting the interval of the stapling, high attachment strength and excellent durability can be obtained even when the wire harness is bent.

[Brief description of the drawings]

1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a schematic diagram showing a state before a protective material is attached, and FIG. 1B is a schematic diagram showing a state after the protective material is attached.

FIG. 2 shows a second embodiment of the present invention, in which (A) is a schematic view showing a heat welding machine, and (B) is a side view.

3A and 3B show a second embodiment of the present invention, in which FIG. 3A is a schematic view showing a state after the protection member is attached, and FIG. 3B is a schematic diagram for explaining the attachment of the protection member.

FIG. 4 is a schematic view showing a state in which the protective material according to the first and second embodiments of the present invention is wound around a roll.

5A and 5B show a conventional example, in which FIG. 5A is a schematic diagram showing a state before a protective material is attached, and FIG. 5B is a schematic diagram showing a state after the protective material is attached.

FIG. 6 is a schematic diagram for explaining details of a protection material of a conventional example.

FIG. 7 is a schematic diagram showing a state in which a protective material of a conventional example is wound around a roll.

[Explanation of symbols]

 W / H Wire harness 1,4 Protective material 1a, 4a Stacked part 2 Heat welding machine 3 Staple

Claims (3)

[Claims] 1. A wire harness protection material for protecting a wire harness constituting a wire harness by winding a protective material around the wire periphery, wherein a flexible sheet material is wound around the wire group constituting the wire harness. And an outer structure of the protective material on a wire harness in which the surplus portions on both sides in the width direction are laminated in a laminated manner and the overlapped portions are welded by a heat welding machine. 2. A wire harness protection material for protecting a wire harness constituting a wire harness by wrapping a protective material around the wire periphery, wherein a flexible sheet material is wound around the wire group constituting the wire harness. An outer structure of a protective material for a wire harness in which surplus portions on both sides in the width direction are laminated in a laminated manner and the overlapped portions are stapled. 3. The structure according to claim 1, wherein the sheet material is a vinyl chloride sheet.