JP2015005352A - Wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure rigidity and suppress permeation and absorption of water.SOLUTION: A wire harness 10 comprises: an electrical wire 20; and a silencer 30 formed by overlapping a belt-shaped independent foam tape 32 to an outer periphery of the electrical wire 20 in a radial direction of the electrical wire 20 and winding the tape in a spiral state. The silencer 30 is for example, formed by overlapping the independent foam tape 32 by half or more of its width dimension and winding the tape in a spiral state, namely by half lap. The silencer 30 is for example, formed of a crosslinked polyethylene or a non-crosslinked polyethylene.

Description

  The present invention relates to a silencer technique for a wire harness.

  In order to suppress abnormal noise when the wire harness comes into contact with the periphery of the wiring location, a rectangular sheet may be wound around the electric wire. However, it has been difficult to obtain an appropriate rigidity for inserting the wire harness into the wiring path in the metal panel such as the back door.

  Patent Documents 1 and 2 disclose techniques for suppressing abnormal noise by winding a nonwoven fabric sheet around an electric wire and hot pressing the nonwoven fabric. Further, Patent Documents 3 to 5 disclose ones using a non-woven fabric as an adhesive tape for bundling wire harnesses excellent in silencing properties and the like.

JP 2011-244614 A JP 2011-222291 A JP 2006-210228 A Japanese Patent Laid-Open No. 11-335637 International Publication No. 98/58032

  However, if a nonwoven fabric is used to suppress abnormal noise, the nonwoven fabric may absorb water or pass water. And if a nonwoven fabric absorbs water or water permeates between a nonwoven fabric and an electric wire through a nonwoven fabric, it will become a cause of decay and deterioration.

  Therefore, an object of the present invention is to suppress water penetration and absorption while ensuring rigidity.

  The wire harness which concerns on a 1st aspect is equipped with an electric wire and the muffling part formed by spirally winding the strip | belt-shaped independent foam tape on the outer periphery of the said electric wire in the radial direction of the said electric wire.

  In the second aspect, the sound deadening portion is formed by spirally winding a band-like independent foam tape while overlapping half or more of the width dimension.

  In the third aspect, the silencer is formed of cross-linked polyethylene or non-cross-linked polyethylene.

  According to the wire harness according to the first aspect, the silencer is formed by spirally winding a band-shaped independent foam tape around the outer circumference of the electric wire in the radial direction of the electric wire. Penetration and absorption can be suppressed.

  According to the wire harness according to the second aspect, the sound deadening portion is formed by wrapping a band-shaped independent foam tape while being stacked more than half of the width dimension, and more than double is stacked on the outer periphery of the electric wire, so that the rigidity is more sure. Can be secured.

  According to the wire harness concerning a 3rd aspect, since the muffling part is formed with crosslinked polyethylene or non-crosslinked polyethylene, it is excellent in weather resistance. In particular, when the sound deadening portion is formed of crosslinked polyethylene, the weather resistance is more excellent.

It is the schematic which shows an example of the wire harness routed by the vehicle. It is a figure which shows a wire harness. It is sectional drawing of a wire harness. It is a figure which shows the process of winding an independent foaming tape around an electric wire.

  Hereinafter, the wire harness 10 according to the embodiment will be described. The wire harness 10 is a wiring material routed in a vehicle such as an automobile (see FIGS. 1 and 2).

  Here, an example in which the wire harness 10 is routed from the vehicle body 2 to the back door 4 will be described. More specifically, the wire harness 10 is routed between the vehicle body 2 and the back door 4 through the vehicle body through hole portion 3 formed in the vehicle body 2 and the door through hole portion 5 formed in the back door 4. The

  The wire harness 10 includes an electric wire 20 and a silencer 30 formed on the outer periphery of the electric wire 20 (see FIG. 2). That is, a portion of the wire harness 10 that is routed in the back door 4 may come into contact with the inner surface of the back door 4 due to vehicle vibration or the like. Therefore, the wire harness 10 is provided with a muffler 30 in order to suppress abnormal sounds such as a hitting sound when contacting the inner surface of the back door 4.

  The wire harness 10 included in the wire harness 10 may be one or plural. The electric wire 20 is a wiring material for supplying power or a signal from the vehicle body 2 to an electric device mounted on the back door 4.

  The silencer 30 is formed by spirally winding an independent foam tape 32 around the outer circumference of the electric wire 20 in the radial direction of the electric wire 20 (see FIGS. 2 to 4).

  More specifically, the muffler 30 is formed flexibly so that the hitting sound when contacting the metal panel or the like forming the back door 4 is at least smaller than the hitting sound when the electric wire 20 contacts. ing. In addition, the muffler 30 employs an independent foam material as the independent foam tape 32 in order to suppress water absorption and to prevent water from entering between the wire 20 and the wire 20. ing. Here, the silencer 30 (independent foam tape 32) is formed of cross-linked polyethylene or non-cross-linked polyethylene.

  For example, the self-foaming tape 32 that forms the silencer 30 may have an adhesive layer formed on one surface of a band-like cross-linked polyethylene. The independent foam tape 32 may be rolled in a state where release paper is attached to the surface of the adhesive layer, or can be peeled from a state where the surface opposite to the adhesive layer is stuck to the adhesive layer. You may form in the property. As the adhesive layer, an acrylic or rubber material can be employed. However, the self-adhesive tape does not need to have an adhesive layer formed thereon. In this case, the independent foam tape may be fixed to the electric wire 20 with an adhesive tape or the like.

  Further, the muffler 30 is provided with an independent foam tape 32 on the outer periphery of the electric wire 20 in order to ensure the rigidity necessary for inserting the wire harness 10 into the routing path in the back door 4 through the door through hole 5. It is formed by being spirally wound while overlapping in the radial direction. Preferably, the silencer 30 may be formed by spirally winding a band-like independent foam tape 32 while overlapping more than half of the width dimension (see FIG. 3). For example, if the independent foam tape 32 having a thickness dimension of 2 mm is used, the silencer 30 having a thickness dimension of 4 mm or more can be formed. However, the silencer may be formed by winding the independent foam tape 32 around the outer circumference of the electric wire 20 in a spiral shape while overlapping the dimensions of half or less of the width. In addition, the winding method which winds the independent foaming tape 32 in a spiral shape while overlapping half or more of the width dimension may be referred to as half wrap winding.

  According to the wire harness 10 concerning the said embodiment, since the muffling part 30 is formed by spirally winding the strip-like independent foam tape 32 on the outer periphery of the electric wire 20 in the radial direction of the electric wire 20, the rigidity is ensured. In addition, water penetration and absorption can be suppressed. And since the rigidity of the wire harness 10 can be ensured, the wire harness 10 can be easily inserted into the routing path in the back door 4 through the door through-hole portion 5, and the efficiency of the vehicle assembly work can be improved.

  Moreover, since the muffling part 30 is formed of the band-shaped independent foam tape 32, the rigidity of the wire harness 10 can be ensured with a single material, and a muffling effect can be obtained. For example, using a hard tube to secure the rigidity of the wire harness, and manufacturing more easily by reducing the number of materials compared to a form in which a sheet for silencing is wound around the hard tube to obtain a silencing effect As well as reducing material costs.

  Moreover, since the muffling part 30 is formed by winding the band-shaped independent foam tape 32 around the electric wire 20, it is easy to perform the winding work while keeping the independent foam tape in a roll shape, and can be wound more smoothly than when the rectangular sheet is wound. it can. That is, the rectangular sheet is wide and it is difficult to supply it in a roll shape. Furthermore, even if the wire 20 has a different diameter, the range of the part to be wound, etc., even if it is not formed in a dedicated size in advance, a single type of independent foam tape can be used to wind the necessary part with versatility. Can do. This contributes to cost reduction. In addition, the number of layers of the independent foam tape 32 that are wound around the electric wire 20 can be adjusted with one kind of independent foam tape 32 with more flexibility.

  Moreover, since the sound deadening part 30 is formed of crosslinked polyethylene or non-crosslinked polyethylene, the weather resistance is excellent. In particular, when the sound deadening portion 30 is formed of crosslinked polyethylene, more excellent weather resistance is exhibited.

  In addition, the muffler 30 is formed by winding the band-like independent foam tape 32 while being stacked more than half of the width dimension, and can be more securely doubled on the outer periphery of the electric wire 20, so that the rigidity can be ensured more reliably. .

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

10 Wire harness 20 Electric wire 30 Silencer 32 Independent foam tape

Claims (3)

Electric wires,
A muffler formed by spirally winding a band-shaped independent foam tape on the outer circumference of the electric wire in the radial direction of the electric wire,
A wire harness comprising: The wire harness according to claim 1,
The silencer is a wire harness that is formed by spirally winding a band-shaped independent foam tape over half of its width. The wire harness according to claim 1 or 2,
The silencer is a wire harness formed of crosslinked polyethylene or non-crosslinked polyethylene.

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