JPH10210627A - Cable sheath material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheath material which saves tape winding work as much as possible and is attached to a group of cables simply, by opening it, resisting the drag-in force of spring steel, and fixing it around a group of cables, with the drag-in force of the spring steel. SOLUTION: A volute cable sheath material 10 is pushed open into the shape of a crooked plate, according to the energizing force, by using a hand or fingers, or the like, and a large number of cables 2 are put on a resin layer on inside. Breaking off the push out of the cable sheath material 10 in this condition will restore the sheath material to a vortex by the spring force of the spring steel, and make the sheath wind on a large number of cables 2, wrapping and binding them. In this condition, the volute peripheral end of the cable sheath material 10 sticks fast to the external surface on its inside by spring force. Then, tapes 15 are wound on both ends in the longitudinal direction of the cable sheath material 10, so as to fix the cable sheath material 10 and the cable 2. This dispenses with the rough winding and half warp winding of the tapes 15, and reduces the manhours in attachment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire sheathing material, and more particularly, to externally protecting a plurality of electric wire groups arranged in an automobile in a bound state over a predetermined range, or partially binding a plurality of electric wire groups. It is used for

[0002]

2. Description of the Related Art Conventionally, in order to protect an electric wire group from an external interference material, to improve the workability of inserting an electric wire group into a panel in a straight line, or to make a simple waterproofing, etc. Lumber is attached.
A tube formed of vinyl chloride or the like is often used as this type of exterior material. Since the outer tube of the electric wire group needs to be covered with the side perpendicular to the axial direction with respect to the electric wire group, as shown in FIG. 6, a so-called vertical split tube 1 cut along the axial direction is provided. Have been.

[0003] In the method of externally covering a group of electric wires using the vertically divided tube 1, first, as shown in FIG. 7A, a large number of electric wires 2 are wound around using a tape 3, and then, FIG.
As shown in the figure, the vertically split tube 1 is opened from the dividing line 1 and covered from the side. Then, as shown in FIG. 7 (C), the vertically divided tube 1 is pressed in the diameter reducing direction so that the inner periphery thereof is brought into close contact with the wire group W, and then the tape 3 is overlaid on the vertically divided tube 1. It is a half-wrap winding that is wound together.

[0004]

As described above, in the case where the conventional vertically divided tube 1 is used, a step of binding the group of electric wires in a rough winding before attaching the vertically divided tube 1 is required. Further, since the vertically divided tube 1 itself does not have a wrapping force with respect to the wire group, it is necessary to prevent the vertically divided tube 1 from being unwound from the outer peripheral end and coming off, and to prevent water from being generated from the outer peripheral end. The tape 3 must be wound half-wrapped over the entire length.

[0005] As described above, since two tape winding steps are required over the entire length of the tube, there are problems in that the tape winding operation is troublesome, the amount of tape used is increased, and the cost is increased.

The present invention has been made in view of the above problems, and has as its object to provide an exterior material that can be easily attached to a group of electric wires while minimizing a tape winding operation as much as possible.

[0007]

In order to achieve the above object, according to the present invention, in the present invention, a spiral spring steel is used as a core material and integrated with a flexible resin layer. The present invention provides a wire sheathing material having a shape, which is opened against the winding force of the spring steel and wound around the outer peripheral surface of the wire group, and is fixed to the outer circumference of the wire group by the winding force of the spring steel. .

[0008] In the state of being wound around the wire group, both ends in the length direction are fixed to the wire group by tape winding.

As described above, the exterior material of the present invention has a structure in which spring steel is incorporated as a core material in a conventional vertically divided tube. When it is pushed open against the spring steel and wrapped around the wire group from the side, it wraps around the spiral wire group by the restoring force of the spring steel to bind and protect the wire group at the same time. Thereafter, both ends in the length direction are fixed to the wire group by tape winding so that the exterior material does not move with respect to the wire group due to vibration or the like.

As described above, in a state where the electric wire group is not tied, the electric wire group can be bound and protected only by covering the above-mentioned exterior material from the side. Both the rough winding step for bundling and the half-wrap winding step after the tube is attached can be eliminated, and it is sufficient only to wind both ends with tape.

Further, since a flexible resin layer is present as a cushion material on both sides of the spring steel as the core material, the built-in spring steel does not contact the wire group, and damages the wire group by the spring steel. There is no danger of short circuit.

It is preferable that vinyl chloride is used as the resin constituting the resin layer.

[0013] It is preferable that, of the resin layers sandwiching the spring steel, the outer end of the resin layer on the outer peripheral side protrudes (claim 4). As described above, when the resin layer on the outer surface side is protruded from the outer peripheral end, the protruding piece can cover the spring steel exposed on the distal end surface.

[0014] The above-mentioned exterior material can be used as a binding material for partially binding the electric wire group, in addition to being attached to the electric wire group over a required range.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments shown in the drawings.

1 and 2 show a first embodiment. The wire sheathing material 10 has a structure in which resin layers 12 and 13 made of vinyl chloride are provided inside and outside a spring steel 11 urged in a winding direction as a spiral shape and integrated. The thickness of the inner resin layer 12 and the outer resin layer 13 is substantially the same as the thickness of the core spring steel 11, as shown in FIG.

In the first embodiment, since the mounting range of the wire sheathing material to the wire group is 80 mm, the axial length of the wire sheathing material 10 is set to 80 mm.
Also, in the first embodiment, the exterior material is a fixed-size object.
It may be formed into a long length and wound into a coil, and may be cut to a required size according to the diameter of a group of electric wires to be used.

FIG. 2 illustrates a method of covering a group of electric wires using the above-described wire sheathing material 10. First, FIG.
As shown in (2), the spirally wound electric wire sheathing material 10 is pushed open in the form of a bent plate according to the urging force by using fingers or the like, and a large number of electric wires 2 are placed on the resin layer 12 on the inner surface side.
In this state, when the push-opening of the wire sheathing material 10 is released, FIG.
As shown in (B), the spring force of the spring steel 11 is restored to the original spiral shape, and the multiple electric wires 2 are wrapped around and wound, and the multiple electric wires 2 are bound.

In this state, the outer peripheral end of the spiral of the wire sheathing material 10 is brought into close contact with the outer surface on the inner peripheral side thereof by spring force,
In addition, since there is no gap, it is not necessary to wind the tape along the entire length in the axial direction to prevent the tape from being unwound and to eliminate the gap at the outer peripheral end portion, unlike the conventional vertically split tube. .

Therefore, finally, as shown in FIG. 2C, the tape 1 is applied only to both ends in the length direction of the electric wire sheathing material 10.
The wire 5 is wound to fix the wire exterior material 10 and the wire 2.
The winding of the tape 15 is for covering the wire sheathing material 10 so that the spring steel 11 is exposed on both end surfaces thereof, and the wire sheathing material 10 is also wrapped by vibration or the like when mounted on an automobile.
This is to prevent the mounting position from being displaced.

FIG. 3 shows a second embodiment of the present invention. In this electric wire sheathing material 10 ′, among the resin layers sandwiching the spring steel 11, the resin layer 12 on the outer surface is swirled at the outer peripheral end in the spiral radial direction from the end surface. The projecting piece 12a is formed so as to project in the circumferential direction.

That is, as shown in FIG. 4, in a state of being wound around a large number of electric wires 2, the projecting pieces 12a
0 is covered with the spring steel 11 exposed at the outer peripheral end.

FIG. 5 shows a third embodiment, in which a wire sheathing material 1 is shown.
0 is extremely short, about 5 to 10 mm, and is used as a binding material for temporarily binding an electric wire at a required position. in this case,
It is not necessary to tape both ends of the wire sheathing material 10 around the wire group.

[0024]

As is clear from the above description, according to the electric wire sheathing material of the present invention, by using a spiral spring steel as the core material, the tape can be formed by the restoring force to its original shape. It can be attached to electric wires without using it. This eliminates the need for the conventional winding of tape and half-wrapping of tape, which reduces the number of installation steps, saves a lot of work, reduces the amount of tape used, and significantly reduces costs. be able to.

Further, when the resin layer on the outer surface side is projected at the outer peripheral end of the spiral, the spring steel is not exposed at the outer peripheral end, and there is no possibility of damaging the external interference material.

[Brief description of the drawings]

FIG. 1A is a perspective view of an electric wire sheathing material according to a first embodiment, and FIG. 1B is a cross-sectional view taken along line BB of FIG.

FIGS. 2A, 2B, and 2C are schematic diagrams showing a process of attaching the wire sheathing material to a wire.

FIG. 3 is a cross-sectional view of an electric wire sheathing material of a second embodiment.

FIG. 4 is a cross-sectional view of a state where the electric wire sheathing material of the second embodiment is attached to an electric wire.

FIG. 5 is a schematic perspective view of a third embodiment.

FIG. 6 is a perspective view of a vertically split tube of a conventional electric wire sheathing material.

FIGS. 7A, 7B, and 7C are schematic diagrams showing a process of attaching to a group of electric wires when using the above-mentioned vertically divided tube.

[Explanation of symbols]

 2 Wire 10 Wire sheath 11 Spring steel 12, 13 Resin layer 15 Tape

Claims (4)

[Claims] 1. A spiral spring steel as a core material,
Opened and wound around the outer circumference of the wire group against the winding force of the spring steel in a shape integrated by sandwiching it between the flexible resin layers, and fixed to the outer circumference of the wire group by the winding force of the spring steel. Wire sheathing material that we are trying to do. 2. The electric wire sheathing material according to claim 1, wherein both ends in the length direction are fixed to the electric wire group by tape winding while being wound around the electric wire group. 3. The electric wire sheathing material according to claim 1, wherein the resin constituting the resin layer is made of vinyl chloride. 4. The electric wire sheathing material according to claim 1, wherein an outer end of the resin layer on the outer peripheral side of the resin layer sandwiching the spring steel is projected.