JP2015076952A - Wire harness and covering material for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure abrasion resistance and cushioning ability (sound isolation performance) of a cover material without needing a complex task such as winding work of a cushioning adhesive tape.SOLUTION: A wiring harness 10 includes: electric wires 9; and a covering material 1 wound around the electric wires 9 and formed into a cylindrical shape. The covering material 1 includes: a base material 2; and a foam resin layer 3 laminated on the base material 2. The base material 2 is a sheet-like material containing a thermoplastic resin. The foam resin layer 3 adheres to a surface of the base material 2.

Description

  The present invention relates to an exterior material wound around an electric wire and a wire harness including the exterior material.

  A wire harness mounted on a vehicle such as an automobile often includes an exterior material such as a corrugated tube in order to protect the electric wire. Furthermore, in order to prevent abnormal noise in the corrugated tube, a buffering adhesive tape called a soft tape may be wound around the corrugated tube.

  Moreover, patent document 1 has shown the sheet-like exterior material wound around an electric wire. The sheet-shaped exterior material is excellent in flexibility because it can be applied to wire bundles of various thicknesses.

  Patent Documents 2 and 3 show that a flexible tape-shaped exterior material provided with an adhesive layer on one side is wound around an electric wire. Note that the exterior material of Patent Document 2 is a tape-like sheet material that has cushioning properties and stretchability and is formed with elliptical small holes arranged in a staggered manner. Further, the exterior material of Patent Document 3 is a tape-like sheet material in which bag-like small convex portions in which air is sealed are arranged in a staggered manner, and an adhesive layer is formed on the top surface of the small convex portions. Has been.

JP 2006-327656 A JP 2010-4614 A JP 2010-4615 A

  When the exterior material of Patent Document 1 is employed, when wear resistance and buffering properties (soundproof properties) are required, it is necessary to wrap a buffering adhesive tape (soft tape). However, it is desirable to be able to provide an exterior material having wear resistance and cushioning properties (soundproofing properties) without requiring troublesome work such as winding a buffering adhesive tape.

  On the other hand, since the exterior material of Patent Document 2 has small holes formed therein, the performance of electric wire protection is not sufficient. Moreover, the exterior material of patent document 3 will deteriorate a buffer property (soundproof property) remarkably only by a small crack | wound being attached to a bag-like small convex part by contact with a peripheral thing.

  SUMMARY OF THE INVENTION An object of the present invention is to ensure the wear resistance and shock-absorbing property (soundproofing) of an exterior material without requiring troublesome work such as a winding operation of a buffering adhesive tape in a wire harness.

  The wire harness which concerns on a 1st aspect is provided with the exterior material formed in the cylinder shape wound around the electric wire and the electric wire. The exterior material has a sheet-like base material containing a thermoplastic resin and a foamed resin layer welded to the surface of the base material.

  The wire harness according to the second aspect is an aspect of the wire harness according to the first aspect. The wire harness which concerns on a 2nd aspect WHEREIN: The said base material of the said exterior material is the textile fabric by which the wire rod of the fiber reinforced plastic containing a thermoplastic resin and a reinforced fiber was woven.

  The wire harness according to the third aspect is an aspect of the wire harness according to the second aspect. The wire harness which concerns on a 3rd aspect WHEREIN: The said base material of the said exterior material is woven along the circumferential direction of the said electric wire thinner than the 1st wire and the said 1st wire which were woven along the longitudinal direction of the said electric wire. And a second woven wire.

  The wire harness according to the fourth aspect is one aspect of the wire harness according to any one of the first aspect to the third aspect. The wire harness which concerns on a 4th aspect WHEREIN: The said exterior material is maintained in the cylinder shape by the welding part in which the one part welded.

  The wire harness according to the fifth aspect is an aspect of the wire harness according to any one of the first aspect to the fourth aspect. The wire harness which concerns on a 5th aspect WHEREIN: The said exterior material has a three-layer structure containing the said foaming resin layer welded to each of both surfaces of the said base material and the said base material.

  Moreover, the exterior material for wire harnesses according to the sixth aspect is an exterior material included in the wire harness according to any one of the first aspect to the fifth aspect.

  In each of the above aspects, the exterior material has a structure in which a foamed resin layer mainly for ensuring buffering properties (soundproofing properties) is laminated on a sheet-like base material for mainly ensuring wear resistance. The sheet-like exterior material having such a structure can protect the electric wire simply by being wound around the electric wire and formed into a cylindrical shape, and is excellent in flexibility because it can be applied to electric wires or electric wire bundles of various thicknesses. ing.

  Furthermore, if the exterior material in each of the above aspects is employed, the wear resistance and shock-absorbing properties (soundproofing) of the exterior material can be ensured without requiring the troublesome work of winding the adhesive tape for cushioning. can do. For example, if the exterior material is wound around the electric wire with the foamed resin layer as the outer surface, the generation of abnormal noise between the exterior material and the surrounding objects can be prevented. Moreover, if the exterior material is wound around the electric wire with the foamed resin layer as the inner surface, the generation of abnormal noise between the electric wire and the exterior material can be prevented.

  In the second aspect, the base material of the exterior material is a woven fabric in which a fiber reinforced plastic wire material including a thermoplastic resin and reinforcing fibers is woven. Such a base material is suitable as a material for an exterior material for a wire harness because it has both flexibility and high wear resistance that can be deformed according to the wiring route of the electric wire.

  Further, in the third aspect, the base material of the exterior material is a woven fabric including a first wire woven along the longitudinal direction of the electric wire and a relatively thin second wire woven along the circumferential direction of the electric wire. . Since the exterior material which has such a base material has the higher flexibility in the direction wound around an electric wire, it is easy to wind around an electric wire.

  Further, in the fourth aspect, the exterior material is maintained in a cylindrical shape by a welded portion in which some of the exterior materials are welded. The welded portion can be formed by a simple operation such as sandwiching a part of the exterior material with a heating instrument such as an ultrasonic stapler. Therefore, it is possible to make a structure that maintains the exterior material in a cylindrical shape by a simple operation without requiring a complicated operation such as winding an adhesive tape over the entire length of the exterior material.

  Further, in the fifth aspect, the three-layered exterior material wound around the electric wire prevents the generation of abnormal noise between the electric wire and the exterior material by the foamed resin layer on the inner surface side, and the foamed resin layer on the outer surface side. Prevents the generation of abnormal noise between the exterior material and surrounding objects. Furthermore, the foamed resin layer on the inner surface side functions as a spacer that maintains the distance between the electric wire and the base material of the exterior material. In this case, since the surrounding objects are unlikely to contact the electric wire as long as a small hole is formed in the base material of the outer packaging material, the performance of protecting the electric wire by the outer packaging material is further increased.

It is a perspective view of wire harness 10 concerning a 1st embodiment. It is a perspective view of exterior material 1 for wire harnesses concerning a 1st embodiment. 3 is an enlarged view of a part of the exterior material 1. FIG. It is a perspective view of wire harness 10A concerning a 2nd embodiment. It is a perspective view of wire harness 10B concerning a 3rd embodiment.

  Hereinafter, embodiments will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention.

<First Embodiment>
First, the wire harness 10 and the exterior material 1 according to the first embodiment will be described with reference to FIGS. The wire harness 10 is a vehicle wire harness mounted on a vehicle such as an automobile.

  As shown in FIG. 1, the wire harness 10 includes an electric wire bundle 90 including a plurality of electric wires 9 and an exterior material 1 wound around the electric wire bundle 90 and formed into a cylindrical shape.

<Wire>
The electric wire 9 is an insulated wire having a metal core wire and an insulating coating covering the periphery of the core wire. The wire harness 10 has a wire bundle 90 including a plurality of wires 9.

<Exterior material>
The exterior material 1 is a sheet material that is wound around the wire bundle 90 and protects each of the wires 9. As shown in FIG. 2, the exterior material 1 is a rectangular sheet material. In the following description, the two edge portions along the longitudinal direction of the electric wire 9 in the outer package 1 wound around the electric wire bundle 90 are referred to as a first edge portion 101 and a second edge portion 102, respectively. The remaining two edge portions are both edge portions in the longitudinal direction of the electric wire 9 and are edge portions along the outer peripheral direction of the electric wire bundle 90.

  The exterior material 1 has a structure in which the foamed resin layer 3 is laminated on the surface of the sheet-like substrate 2. The base material 2 is a sheet-like member containing a thermoplastic resin. The foamed resin layer 3 is a foamed resin layer welded to the surface of the substrate 2.

  The base material 2 of the exterior material 1 is, for example, a woven fabric in which a fiber reinforced plastic wire material including a thermoplastic resin and reinforcing fibers is woven. Such a base material 2 is suitable as a material for the exterior material 1 for a wire harness because it has both flexibility and high wear resistance that can be deformed according to the wiring route of the wire bundle 90.

  The thermoplastic resin contained in the base material 2 is, for example, polypropylene, polyethylene, various nylons, or polyester. Moreover, the fiber which reinforces the thermoplastic resin of the base material 2 is, for example, a fiber such as glass, carbon, or aramid. It is also conceivable that both the thermoplastic resin and the reinforcing fiber of the base material 2 are composed of an olefin resin.

  In the example shown in FIG. 3, the base material 2 of the exterior material 1 is a woven fabric in which a vertical wire 11 and a horizontal wire 12 are woven together. Further, the horizontal wire 12 is thinner than the vertical wire 11. In the state where the outer package 1 is wound around the wire bundle 90, the vertical wire 11 is a wire (first wire) woven along the longitudinal direction of the wire 9, and the horizontal wire 12 is the circumferential direction of the wire bundle 90. It is a wire rod (second wire rod) woven along.

  In other words, the outer packaging material 1 is wound around the wire bundle 90 in a direction in which the horizontal wire 12 of the substrate 2 is along the outer circumferential direction of the wire bundle 90. For the sake of convenience, in FIG. 3, halftone hatching is applied to the horizontal wire 12.

  In the wire harness 10, the exterior material 1 is maintained in a cylindrical shape by a welded portion 4 in which parts of the exterior material 1 are welded. Since the exterior material 1 contains a thermoplastic resin, it can be welded. For example, the welded portion 4 is a portion where the first edge 101 and the second edge 102 of the exterior material 1 are welded.

  In the example shown in FIG. 1, the welded portion 4 is a spot welded portion formed at a plurality of locations in the longitudinal direction of the electric wire 9. The spot welded portion is formed, for example, by sandwiching a portion where the first edge portion 101 and the second edge portion 102 of the exterior material 1 overlap with a spot heating instrument such as an ultrasonic stapler.

  It is also conceivable that the welded portion 4 is formed over the entire length of the exterior material 1. For example, such a welded portion 4 includes a pair of roller-shaped heating devices sandwiching a portion where the first edge portion 101 and the second edge portion 102 of the exterior material 1 overlap each other, and the first edge portion 101 and the second edge portion. It is formed by moving along 102.

  In the present embodiment, the foamed resin layer 3 is formed only on one side of the substrate 2. In the wire harness 10, the exterior material 1 is wound around the wire bundle 90 with the foamed resin layer 3 as the outer surface. Thereby, generation | occurrence | production of the abnormal noise between the surroundings of the exterior material 1 and the wire harness 10 is prevented.

  The foamed resin layer 3 is formed on the surface of the substrate 2 when the exterior material 1 is manufactured. Therefore, there is no trouble of bonding the base material 2 and the foamed resin layer 3 when the wire harness 10 is manufactured.

  The foamed resin layer 3 is a foam mainly composed of a synthetic resin such as polypropylene or urethane resin.

Second Embodiment
Next, the wire harness 10A according to the second embodiment will be described with reference to FIG. FIG. 4 is a perspective view of the wire harness 10A. 4, the same components as those shown in FIGS. 1 to 3 are given the same reference numerals.

  10 A of wire harnesses have the structure from which only the direction of the front and back of the exterior material 1 differs compared with the wire harness 10 shown by FIG.

  That is, in the wire harness 10 </ b> A, the exterior material 1 is wound around the wire bundle 90 with the foamed resin layer 3 as an inner surface. Thereby, generation | occurrence | production of the noise between the wire bundle 90 and the exterior | packing material 1 is prevented.

  Further, in the wire harness 10 </ b> A, the foamed resin layer 3 on the inner surface side functions as a spacer that maintains the distance between the wire bundle 90 and the base material 2 of the exterior material 1. In this case, objects around the wire harness 10 </ b> A are unlikely to contact the electric wires 9 as long as a small hole is formed in the base material 2 of the exterior material 1. Therefore, the performance of electric wire protection by the exterior material 1 is further increased.

<Third Embodiment>
Next, a wire harness 10B according to a third embodiment will be described with reference to FIG. FIG. 5 is a perspective view of the wire harness 10B. 5, the same components as those shown in FIGS. 1 to 3 are denoted by the same reference numerals.

  The wire harness 10B differs from the wire harnesses 10 and 10A shown in FIG. 1 in that the wire harness 10B includes an exterior material 1X in which the foamed resin layer 3 is formed differently.

  The exterior material 1 </ b> X provided in the wire harness 10 has a three-layer structure including a base material 2 and a foamed resin layer 3 welded to both surfaces of the base material 2. Therefore, in the cylindrical exterior material 1X wound around the wire bundle 90, both the inner side surface and the outer side surface are the foamed resin layer 3.

<Effect>
In the wire harnesses 10, 10A, and 10B, the exterior materials 1 and 1X have a foamed resin layer 3 mainly for securing shock-absorbing properties (soundproof properties) as a sheet-like base material 2 for mainly ensuring wear resistance. It has a laminated structure. The sheet-like exterior material 1, 1 </ b> X having such a structure can protect the electric wire 9 simply by being wound around the electric wire bundle 90 and formed into a cylindrical shape, and can be applied to the electric wire 9 or the electric wire bundle 90 having various thicknesses. Because it is possible, it has excellent flexibility.

  Furthermore, if the exterior materials 1 and 1X are employed, the wear resistance and shock-absorbing properties (soundproof properties) of the exterior materials 1 and 1X can be achieved without requiring troublesome work such as winding a buffer tape for buffering. Can be secured.

  As described above, when the wire harness 10 is employed, it is possible to prevent the generation of abnormal noise between the exterior material 1 and the objects around the wire harness 10. Moreover, if the wire harness 10 </ b> A is employed, the generation of abnormal noise between the electric wire 9 and the exterior material 1 can be prevented.

  The base material 2 of the exterior material 1 is, for example, a woven fabric in which a fiber reinforced plastic wire material including a thermoplastic resin and reinforcing fibers is woven. In this case, since the base material 2 has both flexibility that can be deformed according to the wiring route of the wire bundle 90 and high wear resistance, the base material 2 is suitable as a material for the exterior material for the wire harness.

  Further, in the exterior material 1 shown in FIG. 3, the base material 2 includes a vertical wire 11 woven along the longitudinal direction of the electric wire 9 and a relatively thin horizontal wire 12 woven along the direction of the electric wire bundle 90. It is the textile fabric containing. Such an exterior material 1 is easy to wind around the wire bundle 90 because the flexibility in the direction wound around the wire bundle 90 is higher.

  Further, the welded portion 4 can be formed by a simple operation such as sandwiching a part of the exterior material with a heating instrument such as an ultrasonic stapler. Therefore, it is possible to make a structure that maintains the exterior materials 1 and 1X in a cylindrical shape by a simple operation without requiring a complicated operation such as winding an adhesive tape over the entire length of the exterior materials 1 and 1X.

  Further, in the wire harness 10B, the exterior material 1X having a three-layer structure wound around the wire bundle 90 prevents the generation of noise between the electrical wire 9 and the exterior material 1X by the foamed resin layer 3 on the inner surface side. The foam resin layer 3 on the side prevents the generation of abnormal noise between the exterior material 1X and surrounding objects.

  Furthermore, in the exterior material 1 </ b> X of the wire harness 10 </ b> B, the foamed resin layer 3 on the inner surface side functions as a spacer that maintains the distance between the electric wire 9 and the base material 2. In this case, since the surrounding objects are difficult to contact the electric wire 9 as long as the small holes are formed in the base material 2 of the outer packaging material 1X, the performance of protecting the electric wire by the outer packaging material 1X is further increased.

<Application example>
In the wire harnesses 10, 10 </ b> A, 10 </ b> B, it is also conceivable that the exterior materials 1, 1 </ b> X are maintained in a cylindrical shape by tag pins that connect some of them. Usually, a tag pin is a member of a synthetic resin used for attaching a tag such as a price tag or a product display label to a product such as clothes.

  The tag pin has a shaft portion that penetrates a part of the exterior material 1, 1 </ b> X, and two retaining portions that project from the shaft portion to the side at both ends of the shaft portion. It is possible to easily connect parts of the exterior materials 1 and 1X with a tag pin using a tool called a tag gun. When the base material 2 of the exterior materials 1 and 1X is a woven fabric, it is easy to penetrate the tag pin.

  Further, in the wire harnesses 10, 10A, 10B, it is also conceivable that the exterior material 1, 1X wound around the wire bundle 90 is fixed to the wire bundle 90 by a binding material such as an adhesive tape (not shown).

  Moreover, in the exterior materials 1 and 1 </ b> X, a sheet-like member having no woven structure may be adopted as the base material 2.

  In addition, the wire harness and exterior material which concern on this invention can combine each embodiment and application example which were shown above freely within the range of the invention described in each claim, or each embodiment and application example. It is also possible to configure by appropriately modifying or omitting a part.

1, 1X exterior material 10, 10A, 10B wire harness 101 first edge of exterior material 102 second edge of exterior material 11 vertical wire (first wire)
12 Horizontal wire (second wire)
2 Base material 3 Foamed resin layer 4 Welded part 9 Electric wire 90 Electric wire bundle

Claims (6)

Electric wires,
A wire harness comprising: a sheet-like base material including a thermoplastic resin; and a foamed resin layer welded to a surface of the base material, and an exterior material wound around the electric wire and formed into a cylindrical shape.   The wire harness according to claim 1, wherein the base material of the exterior material is a woven fabric in which a fiber reinforced plastic wire material including a thermoplastic resin and a reinforced fiber is woven.   The base material of the exterior material is a woven fabric including a first wire woven along the longitudinal direction of the electric wire and a second wire woven thinner along the circumferential direction of the electric wire than the first wire. The wire harness according to claim 2, wherein   The wire harness according to any one of claims 1 to 3, wherein the exterior material is maintained in a cylindrical shape by a welded portion in which parts of the exterior material are welded.   The wire harness according to any one of claims 1 to 4, wherein the exterior material has a three-layer structure including the foamed resin layer welded to each of the base material and both surfaces of the base material. A thermoplastic resin base material formed into a sheet,
A wire harness exterior material comprising: a foamed resin layer welded to a surface of the substrate.

Images