JP2016021844A - Wire harness sheath material and wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire harness sheath material which can reduce the number of work process and a material cost by combining a surface insulating layer for protecting a core electric wire and an electromagnetic shield layer and a sheath material, and to provide a wire harness using the same.SOLUTION: A wire harness sheath material 20 includes a mesh layer 12 formed in mesh with a resin material and a metal layer 14 stacked on the mesh layer 12, in which the mesh layer 12 and the metal layer 14 are integrally formed. The wire harness sheath material 20 is formed in a cylinder with the metal layer 14 rolled inside the mesh layer 12. The wire harness sheath material 20 is, for example, formed in a cylinder by curling a sheet material, which is made of the mesh layer 12 integrated with the metal layer 14, across the entire width direction. In a wire harness, the wire harness sheath material 20 covers the outer periphery of an electric wire or a wire bundle.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wire harness exterior material and a wire harness, and more particularly to a wire harness exterior material having an electromagnetic shielding function and a wire harness using the same.

  In order to protect an electric wire in a vehicle or the like, an exterior material made of a cylindrical net formed of a plastic material is known as a wire harness exterior material that is sheathed on the electrical wire (Patent Document 1).

Japanese Utility Model Publication No. 05-11720

  An electric wire used for a circuit that requires shielding performance has an electromagnetic shield layer made of a metal braid or the like on the outer periphery of a core electric wire around which a conductor is insulated. A skin insulating layer made of a resin material is formed on the outer periphery of the electromagnetic shield layer. The outer insulating layer fixes the electromagnetic shield layer to the core electric wire and protects the core electric wire and the electromagnetic shield layer. When protecting the wire harness which consists of an electric wire which has such a shielding performance with an exterior material, the function of an outer skin insulating layer and an exterior material overlaps at the point which protects a core electric wire and an electromagnetic shielding layer.

  The problem to be solved by the present invention is to use a wire harness exterior material that can reduce work man-hours and material costs by combining the outer insulation layer and the exterior material that protect the core electric wire and the electromagnetic shield layer, and the same. It is to provide a wire harness.

  In order to solve the above problems, a wire harness exterior material according to the present invention has a mesh layer formed in a mesh shape with a resin material, and a metal layer laminated on the mesh layer, and the mesh layer and the metal layer Is a summary.

  The wire harness exterior material according to the present invention may be formed into a cylindrical shape with the metal layer inside the mesh layer. In this case, the sheet material in which the mesh layer and the metal layer are integrated may be formed into a cylindrical shape by curling the entire width direction. And the said metal layer is good to be adhere | attached on the said mesh layer with the adhesive agent through the resin-made films.

  The summary of the wire harness according to the present invention is that the outer periphery of the electric wire or the bundle of electric wires is covered with the above-described wire harness exterior material.

  In this case, the electric wire or electric wire bundle whose outer periphery is covered by the wire harness exterior material may be an electric wire or electric wire bundle that does not have a metal electromagnetic shield layer. And the said wire harness exterior material is good to cover the outer periphery of the said electric wire or electric wire bundle over the full length. And as said electric wire bundle, the twisted pair wire formed by twisting a pair of core electric wire and the drain wire by which the circumference | surroundings of the signal conductor were insulation-coated is mentioned.

  According to the wire harness exterior material according to the present invention, since it has a mesh layer formed in a mesh shape with a resin material and a metal layer laminated on the mesh layer, it has a function of covering and protecting an electric wire and an electromagnetic shielding function. Have both. For this reason, an electromagnetic shielding layer can be omitted from an electric wire used for a circuit that requires shielding performance. Then, the outer insulation layer provided for the purpose of protecting and fixing the electromagnetic shield layer can also be omitted from the outer wire. As a result, the outer insulating layer and the exterior material that protect the core electric wire and the electromagnetic shield layer are collected, so that the number of work steps and material costs can be reduced.

It is the top view (a) and AA sectional view (b) of the wire harness exterior material which concerns on one Embodiment of this invention. It is an axial sectional view (a) and a perspective view (b) of a wire harness exterior material according to another embodiment of the present invention. It is the schematic diagram which showed the example which applied the wire harness which concerns on this invention to the circuit where a shield performance is required. It is an axial sectional view of the wire harness concerning one embodiment of the present invention.

  Next, an embodiment of the present invention will be described in detail.

  The wire harness exterior material which concerns on this invention protects one electric wire or electric wire bundle in the part covered by covering the outer periphery of the electric wire bundle which consists of the outer periphery of one electric wire or several electric wires. In the covered portion, contact between one electric wire or electric wire bundle and another member is suppressed.

  The wire harness exterior material according to the present invention may be formed into a sheet shape or a cylindrical shape before covering one electric wire or wire bundle. Good. The wire harness exterior material according to the present invention is formed into a cylindrical shape after covering one electric wire or wire bundle.

  In FIG. 1, the wire harness exterior material which concerns on one Embodiment of this invention is shown. Fig.1 (a) is a top view of a wire harness exterior material, FIG.1 (b) is the sectional view on the AA line of a wire harness exterior material. The wire harness exterior material is shown as being formed into a sheet shape. As shown in FIG. 1, the wire harness exterior material 10 includes a mesh layer 12 and a metal layer 14.

  The mesh layer 12 is a layer formed in a mesh shape with a resin material. The mesh layer 12 is composed of a linear resin that forms a mesh. The linear resin is composed of a plurality of vertical lines 12a arranged in parallel in one direction and a plurality of horizontal lines 12b arranged in parallel in another direction intersecting with one direction. A plurality of horizontal lines 12b arranged in parallel are superimposed on a plurality of vertical lines 12a arranged in parallel, and the vertical lines 12a and the horizontal lines 12b are fused at the intersection. Each of the vertical line 12a and the horizontal line 12b is formed by a line having a circular cross section.

  The metal layer 14 is made of a metal thin film (metal foil). The metal layer 14 is bonded to the mesh layer 12 with an adhesive 18 through a resin film 16. Thereby, the mesh layer 12 and the metal layer 14 are united. The resin film 16 is a base film that serves as a base material for supporting the metal layer 14, and makes the thin metal layer 14 made of a metal thin film difficult to break, and is in close contact with the resin film 16 and the resin film 16. The metal layer 14 constitutes a metal tape. That is, the metal layer 14 is integrated with the mesh layer 12 by bonding the metal tape to the mesh layer 12 with the adhesive 18 with the resin film 16 side as the bonding surface side.

  The mesh layer 12 is a part that exhibits the protective function of the wire harness exterior member 10 that protects one electric wire or wire bundle while suppressing contact with other members. From this viewpoint, the mesh layer 12 is configured to be thicker than the metal layer 14 and the thickness of the resin film 16 that supports the metal layer 14. For this reason, the resin material of the mesh layer 12 is comprised with a comparatively thick wire. The resin material of the net-like layer 12 is composed of at least a wire thicker than the metal layer 14 and the thickness of the resin film 16 that supports the metal layer 14.

  FIG. 2 shows a wire harness exterior material according to another embodiment of the present invention. FIG. 2A is an axial sectional view of the wire harness exterior member 20, and FIG. 2B is a perspective view of the wire harness exterior member 20. The wire harness exterior material 20 is shown as what was shape | molded by the cylinder shape. As shown in FIG. 2, the wire harness exterior member 20 has a mesh layer 12 and a metal layer 14. The wire harness exterior material 20 shown in FIG. 2 is different from the wire harness exterior material 10 shown in FIG. 1 in that it is formed into a cylindrical shape, and the layer configuration is the same as that of the wire harness exterior material 10 shown in FIG. The same.

  A wire harness sheathing material 20 shown in FIG. 2 is formed by forming the sheet-like wire harness sheathing material 10 shown in FIG. 1 into a cylindrical shape with the metal layer 14 inside the mesh layer 12. That is, the sheet-like wire harness exterior material 10 shown in FIG. 1, which is a sheet material in which the mesh layer 12 and the metal layer 14 are integrated, is formed into a cylindrical shape by curling the entire width direction. Thereby, the wire harness exterior material 20 is shape | molded by the cylindrical shape by making the metal layer 14 into the inner side rather than the mesh layer 12. FIG.

  In the curling process, for example, a sheet material in which the mesh layer 12 and the metal layer 14 are integrated and cut to a predetermined length is placed inside the mesh layer 12 with the metal layer 14 inside, and is passed through a heating roll in the width direction. It can be performed by forming a circular arc in cross section (adding a bending wrinkle). Further, a long (not cut to a predetermined length) sheet material in which the mesh layer 12 and the metal layer 14 are integrated is arranged so that the metal layer 14 is inside the mesh layer 12 and a cross-sectional circle in the width direction. It can be carried out by continuously shaping (bending wrinkles) so as to form an arc.

  The wire harness exterior member 20 formed into a cylindrical shape has elasticity that maintains the cylindrical shape to the extent that it does not get stuck by its own weight, due to the mesh layer 12 composed of a relatively thick wire that exhibits a protective function, It is maintained in a cylindrical shape. Moreover, since the bending wrinkles are attached by curl processing, even if the width direction both ends of the wire harness exterior material 20 shape | molded by the cylinder are not adhere | attached with an adhesive etc., the wire harness exterior material 20 is a cylinder shape. Maintained. In addition, the width direction both ends of the wire harness exterior material 20 shape | molded by the cylinder shape may be overlaid as shown to Fig.2 (a), and may be faced | matched. The overlapped portion may be bonded with an adhesive or the like, or may not be bonded.

  Since the mesh layer 12 has a mesh, it is easy to bend even if it is made of a wire that is relatively thick enough to exhibit a protective function, and is excellent in curl processability (formability). That is, the reticulated layer 12 is reticulated so that both a protective function and workability are achieved. If a thick plate-like layer is used instead of the mesh layer 12 (the mesh is closed by the same resin as the resin material and has no mesh), the protective function is excellent, but the curl processability (formability) is reduced. To do. In addition, if a thin plate-like layer is used instead of the net-like layer 12, curl processability (moldability) is excellent, but the protective function is lowered.

  The method for forming the wire harness exterior material 20 shown in FIG. 2 is not limited to the method of curling the sheet-like wire harness exterior material 10 shown in FIG. 1 over the entire width direction, but the metal layer 14 is a mesh layer. When the method of uniting with 12 is based on bonding as described above, a sheet material in which the mesh layer 12 and the metal layer 14 are united is obtained, so from the sheet-like wire harness exterior material 10 shown in FIG. It may be formed by curling.

  The resin material of the mesh layer 12 is preferably a thermoplastic resin that can be heat-processed when performing curl processing. The resin material of the mesh layer 12 is not particularly limited, and a known resin material can be used. Examples thereof include polyolefins such as polypropylene and polyethylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, polyphenylene ether, polyphenylene sulfide, and the like. These may be used alone or in combination of two or more. Of these, polyolefins such as polypropylene and polyethylene are preferred from the viewpoint of processability and cost. In addition to the resin, the resin material may contain a metal hydroxide such as magnesium hydroxide, a brominated flame retardant, a flame retardant such as a phosphate ester, and melamine.

  The diameters (diameters) of the vertical lines 12a and the horizontal lines 12b of the reticulated layer 12 are not particularly limited, but are preferably 0.35 mm or more from the viewpoint of protection and cylindrical maintenance. More preferably, it is 0.50 mm or more. Moreover, it is preferable that it is 0.70 mm or less from viewpoints, such as curl workability. More preferably, it is 0.60 mm or less.

  The metal of the metal layer 14 is not particularly limited as long as it is a metal that exhibits electromagnetic shielding properties, and examples thereof include copper, copper alloy, aluminum, aluminum alloy, iron, iron alloy, nickel, and nickel alloy.

  The material of the resin film 16 that supports the metal layer 14 is not particularly limited, and polyolefins such as polypropylene and polyethylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, polyphenylene ether, and polyphenylene sulfide. Etc. When the curling process is performed, a thermoplastic resin that can be heat-processed is preferable, like the resin material of the mesh layer 12. The resin film 16 is preferably thin enough to have flexibility.

  Next, the wire harness according to the present invention will be described. The wire harness which concerns on this invention consists of the outer periphery of the electric wire bundle which consists of the outer periphery of one electric wire or several electric wires with the wire harness exterior material which concerns on this invention. The electric wire is made of a single wire or stranded wire made of a metal having excellent conductivity such as copper, copper alloy, aluminum, and aluminum, and an insulating material such as polyolefin or vinyl chloride resin covering the outer periphery of the electric wire conductor. And an insulator made of a resin material or the like. The wire harness exterior material according to the present invention includes a mesh layer and a metal layer. For this reason, in the covered part, contact with one electric wire or electric wire bundle and another member is suppressed, and one electric wire or electric wire bundle is protected. Moreover, the electromagnetic shielding function is demonstrated in the covered part. That is, the wire harness exterior material which concerns on this invention has the function which covers and protects an electric wire, and an electromagnetic shielding function.

  In the wire harness according to the present invention, the wire harness exterior material is a single electric wire in a place where protection is required from the viewpoint of protecting a single electric wire or a bundle of electric wires and other members from being suppressed. Alternatively, only a part in the length direction of the wire bundle may be covered, but in terms of electromagnetic shielding function, it is preferable to cover the entire length of one wire or wire bundle. The total length of one electric wire or electric wire bundle means between the connectors attached to both ends of the electric wire. Covering the entire length means that one wire or a bundle of wires is covered with the wire harness exterior material in the entire length direction.

  The electric wire bundle consisting of one electric wire or a plurality of electric wires whose outer periphery is covered with the wire harness exterior material according to the present invention is electromagnetically shielded at the covered portion by the electromagnetic shield function of the wire harness exterior material. Therefore, this one electric wire or electric wire bundle can be used for a circuit that requires shielding performance.

  FIG. 3 shows an example in which the wire harness according to the present invention is applied to a circuit that requires shielding performance. In FIG. 3, the electric wire 32 and the electric wire 34 consist of electric wires which do not have a metal electromagnetic shield layer, respectively, in which the outer circumferences of the electric wire conductors 32a and 34a are covered with insulators 32b and 34b. The electric wire 32 and the electric wire 34 are arranged between the apparatuses 36 and 38 through the connector 40 connected to the terminal of the electric wire conductors 32a and 34a. The outer periphery of these electric wires 32 and 34 is sheathed with the wire harness exterior member 20 according to the present invention, and the outer periphery of these electric wires 32 and 34 is covered with the wire harness exterior member 20. The wire harness exterior member 20 covers the wires 32, 34 between the connectors 40 attached to both ends of the wires 32, 34, and covers the bundle of the wires 32, 34 over the entire length.

  An electric wire that is used in a circuit that requires shielding performance and whose outer periphery is covered with the wire harness exterior material according to the present invention may have a metal electromagnetic shield layer on the outer periphery of the insulator. Since the wire harness exterior material which concerns on this is what has an electromagnetic shielding function, it does not need to have a metal electromagnetic shielding layer. From the viewpoint of reducing costs by suppressing duplication of functions, the electric wire preferably does not have a metal electromagnetic shield layer.

  For the same reason, an electric wire bundle composed of a plurality of electric wires, which is used in a circuit requiring shielding performance and whose outer periphery is covered by the wire harness exterior material according to the present invention, is made of metal on the outer periphery of the electric wire bundle. However, it is preferable not to have a metal electromagnetic shield layer from the viewpoint of reducing cost by suppressing duplication of functions.

  An electromagnetic shield layer is omitted from an electric wire or a bundle of wires that do not have a metal electromagnetic shield layer. If it does so, the outer-layer insulation layer provided integrally for the purpose of protecting and fixing an electromagnetic shielding layer can also be omitted from composition of an electric wire or an electric wire bundle. As a result, the outer insulation layer of the electric wire or the electric wire bundle and the wire harness outer material for enclosing the electric wire or the electric wire bundle are collected, so that it is possible to reduce the work man-hours and material costs.

  Examples of the wire bundle used in a circuit that requires shielding performance include a twisted pair wire. The twisted pair wire is used as a two-core balanced cable for digital signal communication such as LAN in the field of in-vehicle devices, OA devices, home appliances, and the like. The twisted pair wire has an effect of canceling the induced electromotive force due to the twist and removing common-mode noise due to the differential communication, and has excellent resistance to induction noise.

  FIG. 4 shows an example of a wire harness in which a twisted pair wire is covered with a wire harness exterior material according to the present invention, and the twisted pair wire is covered with the wire harness exterior material. FIG. 4 is an axial cross-sectional view of a wire harness according to an embodiment of the present invention.

  As shown in FIG. 4, the twisted pair wire 50 is formed by twisting a pair of core electric wires 46 a and 46 b in which the periphery of the signal conductor 42 is insulated and a drain wire 48. The core electric wires 46a and 46b are made of a signal conductor 42 composed of a single wire or a stranded wire made of a metal having excellent conductivity such as copper, copper alloy, aluminum, and aluminum, and a polyolefin or vinyl chloride covering the outer periphery of the signal conductor 42. And an insulator 44 made of an insulating resin material such as resin. The drain wire 48 is a wire made of a single wire or a stranded wire made of a metal having excellent conductivity such as copper, copper alloy, aluminum, or aluminum, and a pair of core wires 46a, 46b over the entire length of the pair of core wires 46a, 46b. Twisted.

  The wire harness 60 according to the present invention is obtained in which the wire harness exterior member 20 according to the present invention is sheathed on such a twisted pair wire 50 and the twisted pair wire 50 is covered with the wire harness exterior member 20. The metal layer 14 that is the inner layer of the wire harness exterior member 20 is in contact with the drain wire 48 of the twisted pair wire 50. The wire harness exterior member 20 covers the outer periphery of the twisted pair wire 50 over the entire length. The wire harness exterior member 20 includes the mesh layer 12 and the metal layer 14 and protects the contact between the twisted pair wire 50 and another member by suppressing the contact. In addition, electromagnetic noise shielding from outside and crosstalk between twisted pairs are prevented.

  The wire harness exterior member 20 serves as an electromagnetic shield layer for shielding electromagnetic noise from the outside in the twisted pair wire 50 and preventing crosstalk between the twisted pairs, and also serves to protect the twisted pair wire 50. Therefore, it is not necessary to separately provide an electromagnetic shield layer covering the outer periphery of the twisted pair wire 50 in the tube of the wire harness exterior material 20, and a skin insulating layer for fixing and protecting the electromagnetic shield layer when separately provided together with it is also provided. Can be omitted. As a result, since the outer insulation layer of the twisted pair wire 50 and the wire harness exterior material that sheathes the twisted pair wire 50 are collected, it is possible to reduce work man-hours and material costs.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

  For example, in FIG. 1, the vertical lines 12 a and the horizontal lines 12 b of the mesh layer 12 are shown as intersecting in a direction orthogonal to each other, but the vertical lines 12 a and the horizontal lines 12 b only need to intersect each other. You may cross | intersect directions other than the direction orthogonal to each other. Moreover, although the shape of the mesh formed by the vertical lines 12a and the horizontal lines 12b is shown as a square, it may be a rectangle (rectangle), a rhombus, a parallelogram, or the like. In FIG. 1, the vertical lines 12 a and the horizontal lines 12 b of the mesh layer 12 are superimposed on the vertical lines, but the vertical lines 12 a and the horizontal lines are knitted, and the vertical lines 12 a and 12 b are intersected at the intersections. And may be fused. Further, the vertical line 12a and the horizontal line 12b may be fused on the same plane. Further, in FIG. 1, the vertical line 12 a and the horizontal line 12 b are respectively shown as circular cross-sectional lines, but the vertical line 12 a and the horizontal line 12 b may have an elliptical cross-section and a rectangular cross-section, respectively. The line 12a and the horizontal line 12b may have the same cross-sectional shape, or may have different cross-sectional shapes.

  In addition, in FIG. 2 (a), a method of curling a sheet material is shown as a method for forming a tubular wire harness exterior material. The obtaining method is not limited to this. For example, a seamless structure may be obtained by forming into a cylindrical shape by extrusion molding or the like. Further, even when the sheet material is subjected to curl processing, if possible, a method of attaching a bending wrinkle to the cylinder by bending without heating may be used.

  Moreover, although the twisted pair wire is illustrated as an electric wire bundle used for the circuit where the shielding performance is required, other wires may be used.

10, 20 Wire harness exterior material 12 Mesh layer 14 Metal layer 16 Resin film 18 Adhesive 50 Twisted pair wire 60 Wire harness

Claims (8)

  A wire harness exterior material comprising: a mesh layer formed in a mesh shape with a resin material; and a metal layer laminated on the mesh layer, wherein the mesh layer and the metal layer are integrated.   The wire harness exterior material according to claim 1, wherein the metal layer is formed in a cylindrical shape with the inside of the mesh layer inside.   The wire harness exterior material according to claim 2, wherein the sheet material in which the mesh layer and the metal layer are integrated is formed into a tubular shape by curling the entire width direction.   The wire harness exterior material according to any one of claims 1 to 3, wherein the metal layer is bonded to the mesh layer with an adhesive via a resin film.   The wire harness characterized by the outer periphery of an electric wire or an electric wire bundle being covered with the wire harness exterior material of any one of Claim 1 to 4.   The wire harness according to claim 5, wherein the electric wire or the electric wire bundle whose outer periphery is covered with the wire harness exterior material is an electric wire or an electric wire bundle that does not have a metal electromagnetic shield layer.   The wire harness according to claim 5 or 6, wherein the wire harness exterior material covers an outer periphery of the electric wire or electric wire bundle over the entire length.   The wire according to any one of claims 5 to 7, wherein the wire bundle is a twisted pair wire formed by twisting a pair of core electric wires and a drain wire, the periphery of the signal conductor being covered with insulation. Harness.

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