JPH0950713A - Flat wire harness and forming sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat wire harness forming sheet capable of surely holding electric wires and fitting even to heavy electric wires. SOLUTION: An electric wire holding groove 12 formed by bending and shaping a resin sheet material 11 is provided on the surface of the resin sheet 11 and the inside of the electric wire holding groove 12 is formed to have a size for holding electric wires. Also, the inlet width X of the electric wire holding groove 12 is set narrower than the outer diameter of the electric wire and by fitting the electric wire in the electric wire holding groove 12, a flat wire harness is integrally formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat wire harness mainly arranged on a door portion of an automobile and a seat for forming the flat wire harness.

[0002]

2. Description of the Related Art There are many techniques for flattening a wire harness, but all of them often require special equipment for wiring or fixing electric wires or require much labor.

Among them, the technique disclosed in Japanese Utility Model Laid-Open No. 5-46608 is capable of easily arranging and fixing electric wires without requiring such equipment.

FIG. 8 shows an example thereof. In this flat wire harness, a cut 2 is made on the surface of the foamed plastic sheet 1, and an electric wire 3 is sandwiched in the cut 2 to form a flat wire harness.

[0005]

By the way, as in the technique of FIG. 8, the electric wire 3 is not fixed securely only by sandwiching the electric wire 3 in the notch 2 provided in the foamed plastic sheet 1, and the electric wire 3 comes off due to the vibration of the vehicle. There was a fear. Also,
It is difficult to insert a thick electric wire into the notch 2,
It was not suitable for wiring thick electric wires.

In view of the above circumstances, it is an object of the present invention to provide a flat wire harness and a sheet for forming the flat wire harness which can surely hold an electric wire and can be fitted with a thick electric wire.

[0007]

According to a first aspect of the present invention, there is provided a flat wire harness forming sheet having a wire holding groove formed on a surface of a resin sheet material by bending the resin sheet material. The inside of the holding groove is formed to have a size capable of holding an electric wire, and the inlet width of the electric wire holding groove is set to be narrower than the outer diameter of the electric wire.

With this sheet, the electric wire can be fitted into the electric wire holding groove from the inlet while utilizing the bending of the electric wire holding groove. Further, once the electric wire is fitted, the entrance of the electric wire holding groove returns to a width narrower than the outer diameter of the electric wire, so that the electric wire can be prevented from coming off.

The flat wire harness forming sheet according to the invention of claim 2 is provided with an electric wire holding groove formed by curving the resin sheet material into a corrugated shape on the front surface and the back surface of the resin sheet material, respectively. The inside of the groove is formed to have a size capable of holding the electric wire, and the inlet width of the electric wire holding groove is set to be narrower than the outer diameter of the electric wire.

In the case of this sheet, the electric wires can be fitted into the electric wire holding grooves on the front and back surfaces, respectively.

According to a third aspect of the present invention, in the flat wire harness forming sheet according to the first or second aspect, a portion where the entrance width is narrower than the outer diameter of the electric wire is provided in the longitudinal direction of the electric wire holding groove. The feature is that they are arranged at intervals.

In this sheet, since the narrowed inlet portions are arranged at intervals in the longitudinal direction of the electric wire holding groove, the ease of fitting the electric wire can be improved.

The invention of claim 4 is the flat wire harness forming sheet according to any one of claims 1 to 3, wherein an adhesive is applied to the surface of the resin sheet material on the side where the electric wire holding groove is formed. Is characterized by.

In this sheet, when the electric wire is fitted in the electric wire holding groove, the electric wire can be held in the electric wire holding groove by the adhesive. Further, the sheet can be attached to the panel surface or the like with an adhesive.

A flat wire harness according to a fifth aspect of the present invention is a flat wire harness in which the electric wire is fitted into all or part of the electric wire holding groove of the flat wire harness forming sheet according to any one of the first to fourth aspects. And the flat wire harness forming sheet are integrated.

This flat wire harness can be easily produced by fitting the electric wire into the electric wire holding groove of the flat wire harness forming sheet.

The invention according to claim 6 is the flat wire harness according to claim 5, wherein at least one of the front surface and the back surface of the sheet for forming the flat wire harness is covered with an electric wire fitted in an electric wire holding groove. It is characterized by being covered with a film. In this flat wire harness, the cover film can protect the electric wire.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 (a) shows a partial structure of a flat wire harness forming sheet 10 according to a first embodiment of the present invention.

The sheet 10 is formed by bending the resin sheet material 11 on the surface of a thermoplastic resin sheet material 11 to form an electric wire holding groove 12 along the wiring pattern of the electric wire. As shown in FIG. 1B, the electric wire holding groove 12 has an inlet width X smaller than the internal width Y so that the electric wire can be held inside the electric wire holding groove 12. The inlet width X is set to be narrower than the outer diameter of the electric wire.

The electric wire holding groove 12 can be formed by vacuum forming, die forming, extrusion forming or the like. In the case of vacuum forming, as shown in FIG. 1C, the groove mold portion 16 is provided in the vacuum forming mold 15 and the width of the inlet 16a of the groove mold portion 16 is made narrower than the inside so that the inner surface of the groove mold portion 16 is The vacuum suction hole 17 is opened. Thereby, when vacuum forming is performed, the wire holding groove 12 having a narrow inlet can be formed. After molding, the resin sheet material 11 can be easily die-cut using the elasticity.

In the sheet 10 thus formed, the electric wire holding groove 12 is formed by bending the resin sheet material 11. Therefore, while utilizing the bending of the electric wire holding groove 12, the inside of the electric wire holding groove 12 from the inlet is utilized. The electric wire can be fitted into.

FIG. 2 shows a flat wire harness 20 having a wire 21 fitted therein. 22 is a connector. Thus, once the electric wire 21 is fitted, the inlet of the electric wire holding groove 12 returns to a width narrower than the outer diameter of the electric wire 21,
The electric wire 21 can be prevented from coming off, and the electric wire 21 can be reliably held. Although the inlet width X is narrow, the inside of the electric wire holding groove 12 is formed to have a size capable of sufficiently holding the electric wire, so that a thick electric wire can be reliably held.

The flat wire harness 20 may of course be used as it is, but as shown in FIG. 3, the flat wire harness 20 is formed by attaching a protective cover film 23 to the side on which the electric wire 21 is fitted. It may be 25.

Further, if the surface of the resin sheet material 11 is coated with an adhesive, the adhesive retains a holding force when the wire is fitted into the wire holding groove. Therefore, the width of the wire holding groove 12 is not narrowly formed over the entire length of the groove, but the portion (prevention portion) 18 having the inlet width narrower than the outer diameter of the wire is spaced in the length direction of the wire holding groove 12. It may be arranged in a desired manner. In this case, it is possible to add a certain amount of holding force together with the holding force of the adhesive, and it is possible to improve the ease of fitting the wire. Further, when the adhesive is applied, the sheet 10B can be directly attached to the panel surface or the like, which facilitates the attachment.

Next, a second embodiment of the present invention will be described with reference to FIG.

The flat wire harness forming sheet 30 according to the second embodiment has a surface 11A of the resin sheet material 11.
The electric wire holding grooves 12A and 12B are respectively formed on the back surface 11B and the back surface 11B by curving the resin sheet material 11 into a corrugated shape. Since it is formed into a corrugated shape, the wire holding grooves 12A and 12B on the front and back surfaces are alternately arranged. In this case, the wire holding grooves 12A and 12B have dimensions such that the inlet widths X1 and X2 are narrower than the inner widths Y1 and Y2 as in the above-described embodiment, and the inner widths Y1 and Y2 can hold the electric wires sufficiently. The width is set, and the entrance widths X1 and X2 are set to be narrower than the outer diameter of the electric wire.

In this sheet 30, since the electric wire holding grooves 12A and 12B are provided on the front surface and the back surface, the electric wire holding groove 1 on the front surface side is formed.
The electric wire can be fitted into the wire holding groove 12B on the rear surface side after the electric wire is fitted into the wire 2A in advance and later. That is, the electric wire holding groove on the front surface or the back surface can be selectively used as required.

FIG. 6A shows the overall structure of the flat wire harness 40 when the electric wires 21 are arranged on both the front and back sides, and FIG. 6B shows the cross section thereof.

Also in the case of this embodiment, as shown in FIG. 7, a portion (prevention portion) 18 having an inlet width narrower than the outer diameter of the wire is provided in the length direction of the wire holding grooves 12A, 12B. It can be arranged at intervals. FIG. 7A shows the overall configuration, and FIG. 7B is a cross-sectional view of a portion where the inlet width is not narrowed,
(C) is sectional drawing of the part which narrowed the entrance width. In addition, of course, this embodiment may be covered with a cover film if necessary.

[0031]

As described above, according to the invention of claim 1, since the electric wire holding groove is formed by bending the resin sheet material, the electric wire holding portion has an inlet width narrower than the electric wire width. The electric wire can be fitted into the electric wire holding groove from the inlet while utilizing the bending of the groove. Further, once the electric wire is fitted, the inlet of the electric wire holding groove returns to a width narrower than the outer diameter of the electric wire, so that the electric wire can be prevented from coming off and the electric wire can be reliably held. In addition, although the inlet width is narrow, the inside of the wire holding groove is formed with a size that can hold the wire sufficiently, so unlike the conventional case where a simple notch is provided, even a thick wire can be reliably Can be held at.

According to the invention of claim 2, since the electric wire holding groove is provided not only on the front surface but also on the back surface, the electric wire is previously held in the electric wire holding groove on the front surface side, and the electric wire holding groove on the rear surface side is attached later. Can also hold the wire. That is, the electric wire holding groove on the front surface or the back surface can be selectively used as required.

According to the third aspect of the present invention, since the portions having the narrowed inlet width are arranged at intervals in the longitudinal direction of the electric wire holding groove, the electric wire holding force can be obtained by other means (for example, adhesive force by an adhesive). In the case where it can be ensured, the ease of fitting the electric wire can be improved, and in addition to that, the electric wire can be reliably held.

According to the invention of claim 4, since the adhesive is applied to the surface of the resin sheet material, when the electric wire is fitted in the electric wire holding groove, the electric wire is inserted into the electric wire holding groove by the adhesive. Can be held. Further, the sheet can be attached to the panel surface or the like with an adhesive, so that the attachment can be facilitated.

According to the fifth aspect of the invention, the flat wire harness can be easily produced by fitting the electric wire into the electric wire holding groove of the flat wire harness forming sheet.

According to the sixth aspect of the present invention, the electric wire can be protected because the electric wire is fitted and the cover film is covered.

[Brief description of drawings]

FIG. 1A is a perspective view showing a partial configuration of a flat wire harness forming sheet according to a first embodiment of the present invention,
(B) is an enlarged sectional view of an electric wire holding groove therein, and (c) is a sectional view of a vacuum forming die of a groove portion when vacuum forming.

FIG. 2A is a plan view of a flat wire harness formed by using the flat wire harness forming sheet of the first embodiment, and FIG. 2B is a sectional view taken along the line IIb-IIb of FIG.

FIG. 3 is a perspective view of a flat wire harness in which a cover film is covered on the configuration of FIG.

FIG. 4 is a perspective view showing a modified example of the flat wire harness forming sheet according to the first embodiment of the present invention.

FIG. 5A is a perspective view showing a partial configuration of a flat wire harness forming sheet according to a second embodiment of the present invention,
(B) is an enlarged sectional view of an electric wire holding groove therein.

FIG. 6A is a plan view of a flat wire harness configured by using the flat wire harness forming sheet of the second embodiment, and FIG. 6B is a cross-sectional view taken along the line VIb-VIb of FIG.

FIG. 7A is a perspective view showing a modification of the flat wire harness forming sheet according to the second embodiment of the present invention, and FIG.
Is a sectional view taken along line VIIb-VIIb in FIG. 7A, and FIG. 7C is a sectional view taken along line VIIc-VIIc in FIG.

FIG. 8 is a perspective view of a conventional example.

[Explanation of symbols]

10, 10B, 30, 30B Flat wire harness forming sheet 11 Resin sheet material 11A Front surface 11B Back surface 12, 12A, 12B Electric wire holding groove 18 Part where inlet width is narrower than outer diameter of electric wire 20, 25, 40 Flat wire harness 21 wire 23 cover film X, X1, X2 entrance width

Claims (6)

[Claims] 1. An electric wire holding groove formed by curving the resin sheet material is provided on the surface of the resin sheet material,
A sheet for flat wire harness formation, characterized in that the inside of the electric wire holding groove is formed to have a size capable of holding an electric wire, and an entrance width of the electric wire holding groove is set to be narrower than an outer diameter of the electric wire. 2. An electric wire holding groove formed by curving the resin sheet material into a corrugated shape is provided on each of a front surface and a back surface of the resin sheet material, and the inside of the electric wire holding groove has a size capable of holding an electric wire. A flat wire harness-forming sheet, characterized in that the inlet width of the wire holding groove is set to be narrower than the outer diameter of the wire. 3. The flat wire harness forming sheet according to claim 1, wherein the inlet width is made narrower than the outer diameter of the electric wire, and the portion is arranged at intervals in the longitudinal direction of the electric wire holding groove. A sheet for forming a flat wire harness, which is characterized in that 4. The flat wire harness forming sheet according to claim 1, wherein an adhesive is applied to a surface of the resin sheet material on a side where the electric wire holding groove is formed. Sheet for forming wire harness. 5. The electric wire and the flat wire harness forming sheet are integrated by fitting the electric wire into all or part of the electric wire holding groove of the flat wire harness forming sheet according to claim 1. A flat wire harness that has been characterized. 6. The flat wire harness according to claim 5, wherein at least one of a front surface and a back surface of the flat wire harness forming sheet is fitted with an electric wire in an electric wire holding groove and then covered with a cover film. A flat wire harness that is characterized.