JP5894960B2 - Wire harness mounting structure - Google Patents

Description

  The present invention relates to a wire harness attachment structure when a wire harness is attached to an interior member together with a soundproof sheet.

  For example, as shown in Patent Document 1, a wire harness mounted on a vehicle includes a protective member that covers an intermediate region of an electric wire. The protective member shown in Patent Document 1 is composed of a hard substrate and a covering made of a felt-like sheet material welded to the substrate.

  Moreover, in a vehicle, a wire harness and a soundproof material are attached to the back side of an interior member such as an installation panel. For example, on the back side of the installation panel, a wire harness connected to electrical equipment such as an instrument, a speaker, or an airbag is fixed by a clamp or the like, and a sheet-like soundproof material such as a nonwoven fabric is adhered by a double-sided tape or the like. The

JP 2010-027242 A

  In recent years, there has been an increasing demand for reduction in the number of man-hours for mounting parts in the vehicle manufacturing process. Therefore, it is desired that the wire harness and the soundproofing material attached to the back side of the interior member can be attached more easily than before.

  An object of this invention is to be able to simplify the attachment of the electric wire and soundproofing material to the back side of the interior member which needs soundproofing (sound absorption or sound insulation) in a vehicle.

The wire harness mounting structure according to the first aspect of the present invention includes a protruding portion, a soundproof sheet, and a fixing portion formed on the interior member. The soundproof sheet is made of a non-woven sheet-shaped soundproof material combined with a wire harness. Furthermore, the soundproof sheet is formed with a through hole into which the protruding portion of the interior member is inserted. The fixing portion is a portion that fixes the soundproof sheet to the interior member. In addition, the protruding portion of the interior member is formed so as to extend from the shaft portion penetrating the through hole of the soundproof sheet to the side, and opposite to the surface of the soundproof sheet on the interior member side. And a retaining portion that is caught by the edge of the through hole on the surface of the through hole, and the retaining portion is formed with a width larger than the inner diameter of the through hole, and the retaining member is deformed while deforming the soundproof sheet. When the portion passes through the through hole, the retaining portion is hooked on the edge of the through hole, and a part of the soundproof sheet is bound to a part of the intermediate region of the wire harness by a binding material. The soundproof sheet and the wire harness are combined .

  The wire harness attachment structure according to the second aspect of the present invention is an aspect of the wire harness attachment structure according to the first aspect. In the wire harness mounting structure according to the second aspect, the soundproof sheet includes a double sheet-shaped soundproof material that is overlapped and joined with a part of the wire harness sandwiched therebetween.

The wire harness attachment structure according to the third aspect of the present invention is an aspect of the wire harness attachment structure according to the first aspect or the second aspect . In the wire harness mounting structure according to the third aspect, the fixing portion is a fastener that is fitted into the hole of the interior member and remains at the edge of the hole.

  In the wire harness mounting structure according to each of the above aspects, the wire harness is combined with the soundproof sheet. Therefore, the attachment of the wire harness to the interior member is completed only by fixing the soundproof sheet to the interior member that requires sound insulation (such as sound absorption or sound insulation).

  Furthermore, the soundproof sheet and the wire harness are positioned at a predetermined correct position in the interior member only by arranging the soundproof sheet so that the protruding portion of the interior member enters the through hole of the soundproof sheet.

  Therefore, according to the wire harness attachment structure according to each of the above aspects, the operation of attaching the wire harness and the soundproof sheet to the interior member that requires soundproofing is simplified.

  Moreover, in the wire harness attachment structure which concerns on a 2nd aspect, since the wire harness is pinched | interposed between the double sound-insulation sheets excellent in shock absorbing property, generation | occurrence | production of the noise by the vibration of a wire harness can be prevented. Furthermore, the wire harness and the soundproof sheet can be combined by a simple assembling operation of sandwiching the intermediate region of the wire harness between the double soundproof sheets and joining the double soundproof sheets.

Moreover, in the wire harness attachment structure which concerns on a 1st aspect, the securing part of the projection part in an interior member is hooked on the edge part of the through-hole in a soundproof sheet. In this case, even before the soundproof sheet is fixed to the interior member, it is difficult for the soundproof sheet to be displaced in the interior member.

Therefore, the wire harness attachment structure according to the first aspect is particularly suitable for the cases as shown below. For example, even when the soundproof sheet is positioned in a state in which the protrusions face in the lateral direction, the soundproof sheet can be prevented from being displaced. Further, even when the interior member is moved before the positioned soundproof sheet is fixed to the interior member, the positional displacement of the soundproof sheet is prevented.

Moreover, in a 3rd aspect, attachment of a sound-insulation sheet | seat and a wire harness to an interior member is completed only by inserting a fastener in the hole of an interior member. Therefore, the work of attaching the wire harness and the soundproof sheet to the interior member becomes easier.

It is a disassembled perspective view of the wire harness attachment structure 10 which concerns on embodiment of this invention. 3 is an exploded plan view of the wire harness mounting structure 10. FIG. 1 is a plan view of a wire harness mounting structure 10. FIG. 3 is a perspective view of a soundproof sheet positioning structure according to an application example applicable to the wire harness mounting structure 10. FIG. It is sectional drawing of the combined structure of the wire harness and soundproof sheet which concern on the application example applicable to the wire harness attachment structure.

  Hereinafter, embodiments of the present invention 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. The wire harness attachment structure shown below is a structure for attaching a wire harness to the back side of an interior member such as an installation panel forming an inner wall of a passenger compartment in a vehicle, for example.

  First, a wire harness mounting structure 10 according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the wire harness attachment structure 10 includes a protrusion 64 and a fastening hole 65 formed in the interior member 6, a double soundproof sheet 1, and a fastener 2.

<Interior parts>
The interior member 6 is, for example, an installation panel that forms an inner wall of a passenger compartment in a vehicle. In the following description, the interior side of the interior member 6 is referred to as the front side, and the opposite side is referred to as the back side. 1 to 3, the interior member 6 is shown with its back side facing upward.

  In the example shown in FIG. 1, the interior member 6 has a double panel structure in which at least a part thereof overlaps with a front side panel 61 located on the front side and a back side panel 62 located on the back side with a gap therebetween. Further, the interior member 6 shown in FIG. 1 also includes an air conditioning duct 63 formed on the back side of the front panel 61. The air-conditioning duct 63 is a cylindrical portion that forms a passage for air sent from an air conditioner (not shown) into the room.

  Further, a projection 64 for positioning the double soundproof sheet 1 is formed on the back side of the interior member 6. In the example shown in FIG. 1, the protrusion 64 is formed on the back surface of the back panel 62. Further, in the example shown in FIG. 1, a plurality of protrusions 64 are formed. A more specific role of the protrusion 64 will be described later.

  Further, a fastening hole 65 used for fixing the double soundproof sheet 1 to the interior member 6 is formed in the back panel 62 of the interior member 6. The fastening hole 65 is a part in which a hole into which a part of the fastener 2 is inserted is formed. A more specific role of the retaining hole 65 will be described later.

<Wire harness>
The wire harness 90 includes a plurality of electric wires 9 attached to the interior member 6. Each electric wire 9 is an insulated wire having a core wire that is a long conductor and an insulating coating that is an insulator covering the periphery of the core wire. In the example shown in FIG. 1, a connector is provided at the end of the electric wire 9.

<Soundproof sheet>
The double soundproof sheet 1 includes a first soundproof sheet 11 and a second soundproof sheet 12 arranged along an intermediate region 91 between both ends of the wire harness 90. The first soundproof sheet 11 and the second soundproof sheet 12 are overlapped and joined with the intermediate region of the wire harness 90 sandwiched therebetween. Thereby, the double soundproof sheet 1 is maintained in a state of being combined with the wire harness 90.

  Each of the soundproof sheets 11 and 12 is a soundproof material such as a sheet-like sound absorbing material or a sound insulating material. Each of the soundproof sheets 11 and 12 is a sheet-like soundproof material having flexibility and elasticity, and is, for example, a nonwoven fabric. The soundproofing material is a sound absorbing material, a sound insulating material, a vibration damping material, or the like. For example, each of the soundproofing sheets 11 and 12 is a nonwoven fabric having a thickness of about 20 mm to about 50 mm.

  The shape of the double soundproof sheet 1 is determined according to the shape of the space where the double soundproof sheet 1 is disposed and the range that requires soundproofing. Further, the thickness of the double soundproof sheet 1 is mainly determined according to the required soundproof performance.

  The first soundproof sheet 11 and the second soundproof sheet 12 shown in FIG. 1 are each composed of two soundproof sheets having the same contour shape. However, the first soundproof sheet 11 and the second soundproof sheet 12 may be composed of a single soundproof sheet folded in double. In this case, about half of the area of the one soundproof soundproof sheet to be folded is the first soundproof sheet 11, and the remaining area is the second soundproof sheet 12.

  Further, at least a part of the contour of the second soundproof sheet 12 is formed along the contour of the first soundproof sheet 11. In the example shown in FIGS. 1 to 3, the entire contour of the second soundproof sheet 12 is formed along the entire contour of the first soundproof sheet 11. In this case, it is conceivable that the contour of the second soundproof sheet 12 is formed to coincide with the contour of the first soundproof sheet 11. Alternatively, it is conceivable that the contour of the second soundproof sheet 12 is formed along the contour of the first soundproof sheet 11 slightly inside the contour of the first soundproof sheet 11.

  Each of the soundproof sheets 11 and 12 is a sheet-like member made of a synthetic resin including a thermoplastic resin. For example, it is conceivable that each of the soundproof sheets 11 and 12 is a nonwoven fabric or a foamed urethane resin sheet material.

  Here, the nonwoven fabric will be described. The nonwoven fabric employed as each of the soundproof sheets 11 and 12 includes, for example, intertwined basic fibers and an adhesive resin called a binder. The adhesive resin is a thermoplastic resin having a melting point lower than the melting point of the basic fiber (for example, a melting point of about 110 [° C.] to about 150 [° C.]).

  Such a nonwoven fabric is heated to a temperature lower than the melting point of the basic fiber and higher than the melting point of the adhesive resin, whereby the adhesive resin melts and melts into the gaps of the basic fibers. Thereafter, when the temperature of the nonwoven fabric is lowered to a temperature lower than the melting point of the adhesive resin, the adhesive resin is cured in a state in which the basic fibers existing around are bonded. Thereby, the shape of a nonwoven fabric becomes harder than the state before a heating, and is maintained with the shape shape | molded by the mold at the time of a heating.

  The adhesive resin is, for example, a granular resin or a fibrous resin. It is also conceivable that the adhesive resin is formed so as to cover the periphery of the core fiber. As described above, the fiber having a structure in which the core fiber is coated with the adhesive resin is referred to as a binder fiber. As the material of the core fiber, for example, the same material as the basic fiber is adopted.

  In addition, the basic fiber only needs to maintain the fiber state at the melting point of the adhesive resin, and various fibers can be employed in addition to the resin fiber. In addition, as the adhesive resin, for example, a thermoplastic resin fiber having a melting point lower than that of the basic fiber is employed. As a combination of the basic fiber constituting the nonwoven fabric and the adhesive resin, for example, a resin fiber mainly composed of PET (polyethylene terephthalate) is adopted as a basic fiber, and a copolymer resin of PET and PEI (polyethylene isophthalate) is bonded. It may be adopted as a resin. In such a nonwoven fabric, the melting point of the basic fiber is approximately 250 [° C.], and the melting point of the adhesive resin is a temperature between about 110 [° C.] and about 150 [° C.].

  The nonwoven fabric containing the adhesive resin is heated in a state of being in close contact with another member containing the thermoplastic resin, so that the heated portion is welded to the other member. For example, when heated in a state where a plurality of non-woven fabrics are stacked, the adhesive resins of the non-woven fabrics are welded together. Thereby, a plurality of nonwoven fabrics are joined.

  In the example shown in FIGS. 1 to 3, the first soundproof sheet 11 and the second soundproof sheet 12 are welded to each other, whereby the first soundproof sheet 11 and the second soundproof sheet 12 are joined. Therefore, the double soundproof sheet 1 is formed with a welded portion 3 that is a portion joined by welding.

  The welding portion 3 is formed by pressing a heating body that performs spot heating against a part of the double soundproof sheet 1. As the heating element for spot heating, for example, a welding horn in an ultrasonic welding machine such as an ultrasonic stapler or a metal rod with a built-in heater can be considered.

  Moreover, in the example shown by FIGS. 1-3, the welding part 3 is a spot welding part formed locally in a comparatively small area | region. In this case, the spot shape of the welded portion 3 is not limited to a circle. For example, the spot shape of the welded portion 3 may be a polygon such as a quadrangle, an ellipse, or other irregular shapes.

  The double soundproof sheet 1 is formed with a first through hole 41 for positioning and a second through hole 42 for fixing. The first through hole 41 is a hole into which the protrusion 64 of the interior member 6 is inserted. On the other hand, the second through hole 42 is a hole into which a part of the fastener 2 is inserted. Details of the roles of the first through hole 41 and the second through hole 42 will be described later.

<Fastening>
The fastener 2 is an example of a fixing portion that fixes the double soundproof sheet 1 to the interior member 6. A part of the fastener 2 is passed through the second through hole 42 of the double soundproof sheet 1 and is fitted into the hole of the fastening hole portion 65 of the interior member 6. Thereby, the fastener 2 remains in the fastening hole portion 65 (the edge portion of the hole) in a state where the edge portion of the second through-hole 42 in the double soundproof sheet 1 is sandwiched between the interior member 6. As a result, the double soundproof sheet 1 is fixed to the interior member 6.

<Installation procedure of double soundproof sheet>
As shown in FIGS. 1 to 3, the double soundproof sheet 1 is disposed on the back side of the interior member 6 such that the protrusion 64 of the interior member 6 enters the first through hole 41. Thereby, the double soundproof sheet 1 and the wire harness 90 are positioned at a predetermined correct position on the back side of the interior member 6.

  For correct positioning of the double soundproof sheet 1, at least two first through holes 41 are formed in the double soundproof sheet 1, and at least two protrusions 64 corresponding to them are formed in the interior member 6. Is desirable.

  When the double soundproof sheet 1 is positioned by the protrusion 64 of the interior member 6, the retaining hole 65 of the interior member 6 and the second through hole 42 of the double soundproof sheet 1 are overlapped.

  The double soundproof sheet 1 is fixed to the interior member 6 by the fastener 2 after being positioned by the protrusion 64. The double soundproof sheet 1 is preferably fixed with fasteners 2 at a plurality of locations.

<Effect>
In the wire harness mounting structure 10, the wire harness 90 is combined with the double soundproof sheet 1. Therefore, the attachment of the wire harness 90 to the interior member 6 is completed only by fixing the double soundproof sheet 1 to the interior member 6 that requires sound insulation (sound absorption or sound insulation).

  Furthermore, the double soundproof sheet 1 is arranged so that the protrusion 64 of the interior member 6 enters the first through hole 41, and the intermediate region 91 of the double soundproof sheet 1 and the wire harness 90 is in the interior member 6. It is positioned at a predetermined correct position.

  Therefore, according to the wire harness attachment structure 10, the attachment work of the wire harness 90 and the double soundproof sheet 1 to the interior member 6 that requires soundproofing is simplified.

  Further, the intermediate region 91 of the wire harness 90 is sandwiched between the double soundproof sheets 1 having excellent buffering properties. Therefore, the generation of abnormal noise due to the vibration of the wire harness 90 can be prevented. Furthermore, the wire harness 90 and the double soundproofing are obtained by a simple assembling operation of sandwiching the intermediate region 91 of the wire harness 90 between the first soundproofing sheet 11 and the second soundproofing sheet 12 and joining the soundproofing sheets 11 and 12. The sheet 1 can be combined.

  Moreover, the attachment of the double soundproof sheet 1 and the wire harness 90 to the interior member 6 is completed only by fitting the fastener 2 into the retaining hole 65 of the interior member 6. Therefore, the work of attaching the wire harness 90 and the double soundproof sheet 1 to the interior member 6 becomes very simple.

<Application example of soundproof sheet positioning structure>
Next, an application example of the soundproof sheet positioning structure applicable to the wire harness mounting structure 10 will be described with reference to FIG. FIG. 4A is an exploded perspective view of the soundproof sheet positioning structure according to the application example (before positioning). FIG. 4B is a perspective view of the soundproof sheet positioning structure according to the application example (after positioning).

  In the example shown in FIG. 4, the protrusion 64 </ b> A according to the application example is formed on the interior member 6. The protruding portion 64A has a shaft portion 641 and a retaining portion 642. The shaft portion 641 is a portion that penetrates the first through hole 41 of the double soundproof sheet 1. On the other hand, the retaining portion 642 is a portion formed to protrude from the shaft portion 641 to the side. The retaining portion 642 is caught by the edge of the first through hole 41 on the surface opposite to the surface on the interior member 6 side of the double soundproof sheet 1.

  The first soundproof sheet 11 and the second soundproof sheet 12 have flexibility and stretchability. Therefore, even if the retaining portion 642 is formed with a width slightly larger than the inner diameter of the first through hole 41, the retaining portion 642 is formed in the first through hole 41 while temporarily deforming the double soundproof sheet 1. Can pass through.

  As shown in FIG. 4, it is desirable that the retaining portion 642 is formed with a tapered surface 642 whose width gradually increases from the top of the head. Accordingly, the retaining portion 642 can easily pass through the first through hole 41 without impairing the property of being difficult to be removed from the first through hole 41.

  The retaining portion 642 passes through the first through-hole 41 and then is caught on the edge of the first through-hole 41 on the surface opposite to the surface on the interior member 6 side of the double soundproof sheet 1.

When this application example is adopted, even before the double soundproof sheet 1 is fixed to the interior member 6, the position of the double soundproof sheet 1 in the interior member 6 is unlikely to occur. Therefore, this application example is particularly suitable for the following cases.

  For example, as shown in FIG. 4, even when the double soundproof sheet 1 is positioned in a state in which the protrusions 64 </ b> A are oriented in the lateral direction, the displacement of the double soundproof sheet 1 is prevented. In addition, even when the interior member 6 is moved before the positioned double soundproof sheet 1 is fixed to the interior member 6, the displacement of the double soundproof sheet 1 is prevented.

<Application example of combined structure of wire harness and soundproof sheet>
Next, with reference to FIG. 5, an application example of a sound-insulating sheet combining structure applicable to the wire harness mounting structure 10 will be described. FIG. 5 is a cross-sectional view of the combined structure of the wire harness 90 and the soundproof sheet 1 according to this application example.

  In the example shown in FIG. 5, a part of one soundproof sheet 11 is bundled with a part of the intermediate region 91 of the wire harness 90 by the binding material 7, whereby the one soundproof sheet 11 and the wire harness 90 are The intermediate region 91 is united.

  More specifically, a pair of through holes 43 are formed on both sides of the path of the intermediate region 91 of the wire harness 90 in the soundproof sheet 11. The binding material 7 is passed through the pair of through holes 43 in the soundproof sheet 11, and binds the wire harness 90 and a portion between the pair of through holes 43 in the soundproof sheet 11.

  It is also conceivable that the structure shown in FIG. 5 is adopted as the combined structure of the soundproof sheet 11 and the wire harness 90.

<Others>
In the wire harness mounting structure 10, the fixing portion for fixing the double soundproof sheet 1 to the interior member 6 may be a spot welded portion or a stapled portion.

  The wire harness mounting structure according to the present invention can be freely combined within the scope of the invention described in each claim, or can be modified as appropriate according to the embodiment and application examples described above. It is also possible to constitute by omitting or omitting a part.

DESCRIPTION OF SYMBOLS 1 Double soundproof sheet 1 1st soundproof sheet 2 Fastener 3 Welding part 6 Interior member 7 Bundling material 9 Electric wire 10 Wire harness attachment structure 11 Soundproof sheet (1st soundproof sheet)
12 Soundproof sheet (second soundproof sheet)
41 1st through-hole 42 2nd through-hole 43 A pair of through-hole 61 Front side panel 62 Back side panel 63 Air-conditioning duct 64, 64A Protrusion part 65 Fastening hole part 90 Wire harness 91 Intermediate | middle area | region of a wire harness 641 Protrusion part axial part 642 Protrusion Retaining part of the part

Claims (3)

A protrusion formed on the interior member;
A non-woven sheet-like soundproof material combined with a wire harness, and a soundproof sheet in which a through hole into which the protrusion of the interior member is inserted is formed;
The soundproofing sheet have a, a fixing portion to be fixed to the interior member,
The protrusion of the interior member is
A shaft portion that penetrates the through hole of the soundproof sheet;
A retaining portion that is formed to project laterally from the shaft portion and is hooked to the edge of the through hole on the surface opposite to the surface on the interior member side of the soundproof sheet;
The retaining portion is formed with a width larger than the inner diameter of the through-hole, and the retaining portion penetrates the through-hole while deforming the soundproof sheet, so that the retaining portion is formed on the through-hole. Get caught on the edge,
A wire harness mounting structure in which a part of the soundproof sheet is bound to a part of an intermediate region of the wire harness by a binding material, and the soundproof sheet and the wire harness are combined . The wire harness mounting structure according to claim 1,
The said sound-insulation sheet | seat is a wire-harness attachment structure containing the double sheet-like soundproof material joined in the state which pinched | interposed the part of the said wire harness in between. The wire harness mounting structure according to claim 1 or 2,
The wire harness mounting structure , wherein the fixing portion is a fastener that is fitted into a hole of the interior member and stays at an edge of the hole .

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