JP5578475B2 - Vehicle ceiling material - Google Patents

Description

  The present invention relates to a vehicular ceiling material, and more particularly to a vehicular ceiling material having a base material, a skin layer, and a back surface layer, and a wire harness wired on the back surface of the back surface layer.

  Conventionally, a vehicular ceiling material in which a skin layer is provided on the front surface side of a base material and a back surface layer is provided on the back surface side of the base material is known (see, for example, Patent Document 1).

  In this type of vehicle ceiling material, the base material and the skin layer are generally made of a breathable material. For this reason, the back surface layer is made of a non-breathable material, thereby stopping the flow of air from the vehicle interior to the back side of the ceiling material and preventing dust and the like from adhering to the surface of the skin layer.

  By the way, while the quietness of the vehicle is required, there is a demand for a vehicle ceiling material with higher sound absorption performance. However, in conventional ceiling materials for vehicles, the sound absorption performance is determined by the foam density of the base material and the thickness of each layer, so there is a limit to the improvement of the sound absorption performance.

  Therefore, it is conceivable to improve the sound absorbing performance by floating and adhering a non-breathable back layer to the base material. FIG. 8 is a diagram illustrating a basic configuration of a vehicle ceiling material with improved sound absorption performance. The vehicle ceiling material 100 includes a base material 101, a skin layer 102, a back surface layer 103, and a wire harness 104. The wire harness 104 is fixed to the back surface of the back surface layer 103 with an adhesive tape 105.

  The back surface layer 103 includes an adhesive portion that is bonded to the base material 101 and a non-adhesive portion that is not bonded to the base material 101. In FIG. 8, only the part which has the non-bonding part 106 among the ceiling materials 100 for vehicles is shown. Since the non-bonding portion 106 is not bonded to the base material 101, the non-bonding portion 106 can vibrate in the direction indicated by the arrow (10). Therefore, the membrane vibration of the non-adhered portion 106 can be obtained, and the sound absorption performance can be further enhanced.

JP 2003-280666 A

  However, in the vehicle ceiling material 100, since the non-bonding portion 106 is not bonded to the base material 101, the wire harness 104 may flutter in the direction indicated by the arrow (11), and an abnormal noise may be generated. . Therefore, a vibration countermeasure for preventing such flapping of the wire harness 104 is desired.

  This invention is made | formed in view of such a situation, and is providing the vehicle ceiling material which can improve sound absorption performance more and can prevent flapping of a wire harness.

  The present invention includes a base material, a skin layer that is provided on the front surface side of the base material and forms a ceiling surface in a vehicle interior, a back surface layer for airflow prevention provided on the back surface side of the base material, and the back surface layer A ceiling member for a vehicle having a wire harness wired on the back surface, wherein the back surface layer is bonded to the back surface of the base material, and is non-vibrable capable of being bonded to the back surface of the base material And a hole that is formed in the non-bonded part and partially exposes the back surface of the base material, and the wire harness is fixed to the exposed surface of the base material exposed from the hole It is characterized by.

  According to the present invention, since the wire harness is fixed to the base material, it is difficult to move with respect to the base material even if it receives vibration. Therefore, it is possible to provide a vehicle ceiling material that can further improve the sound absorption performance due to the membrane vibration of the non-adhered portion, and that can prevent fluttering of the wire harness.

It is a perspective view of a vehicle provided with the ceiling material for vehicles of an embodiment concerning the present invention. It is CC sectional drawing of FIG. 1, and is sectional drawing of the ceiling material for vehicles. FIG. 3 is a plan view of a ceiling material for a vehicle, which is a view as viewed from an arrow D in FIG. It is the E section enlarged view of FIG. It is the FF sectional view taken on the line of FIG. It is a figure explaining the processing method of a hole, (a) is a figure which shows the process of cut | disconnecting a back surface layer, (b) is a figure which shows the process of removing the cut | disconnected piece part, (c) is a wire to a base material It is a figure which shows the process of fixing a harness. It is a figure explaining the effect | action of the fixing structure of a wire harness. It is sectional drawing of the ceiling material for vehicles which improved the sound absorption performance.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment. The surface of each layer of the ceiling material is a surface facing the passenger compartment, and the back surface of each layer is a surface facing the roof of the vehicle.

  As shown in FIG. 1, the vehicle 10 includes a vehicle body 11, a front wheel 12, a rear wheel 13, and a passenger compartment 14. The vehicle body 11 includes a roof 15 that covers the upper portion of the passenger compartment 14. Inside the roof 15, a vehicular ceiling material 20 is provided that interiors the ceiling surface of the vehicle compartment 14.

A basic configuration of the ceiling material 20 will be described with reference to FIGS. 2 and 3.
As shown in FIG. 2, the ceiling material 20 includes a base material 21, a skin layer 22 that is provided on the surface side of the base material 21 and forms a ceiling surface in the passenger compartment 14 (see FIG. 1), and the base material 21. The back surface layer 23 for ventilation prevention provided in the back surface side is laminated | stacked, for example, is integrated by hot press molding.

  The base material 21 is made of, for example, a foam material typified by urethane foam. Moreover, the skin layer 22 is arbitrarily selected from breathable materials, such as a nonwoven fabric, a woven fabric, and a knit. The back layer 23 is made of a non-breathable material, and is preferably selected from, for example, a heat shielding material such as an aluminum vapor deposition film that can suppress temperature rise in the passenger compartment. The skin layer 22 and the back surface layer 23 are bonded to the base material 21 by, for example, an adhesive applied or impregnated on the base material 21. A reinforcing fiber layer (for example, a glass mat) that also serves as an adhesive layer is interposed between the base material 21 and the skin layer 22 or between the base material 21 and the back surface layer 23, so that the skin layer 22 or the back surface layer is interposed. 23 may be bonded to the substrate 21.

  As shown in FIG. 3, the ceiling member 20 has a substantially rectangular shape in plan view. The front part of the ceiling material 20 is formed with left and right recesses 24 in which the sun visor is accommodated. The back surface layer 23 includes an adhesive portion 23 a that is bonded to the base material 21 (see FIG. 2) and a non-adhesive portion 23 b that is not bonded to the base material 21.

  The non-bonding portion 23b is provided, for example, in a rectangular region (a region surrounded by an alternate long and short dash line in FIG. 3), and is provided in the central portion 25 at a position behind the left and right concave portions 24. The adhesion part 23a is provided in the area | region except the non-adhesion part 23b among the back surface layers 23, and is provided so that the non-adhesion part 23b may be enclosed. The back surface layer 23 is buoyant by the bonding portion 23a and the non-bonding portion 23b. Note that the position, shape, area, and number of the bonding portion 23a and the non-bonding portion 23b are not limited to this example, and can be arbitrarily changed according to specifications required for the ceiling material.

  Moreover, the means for providing the non-adhesion part 23b in the back surface layer 23 is selected from arbitrary means. For example, the non-adhesion part 23b can be obtained by providing the area | region where an adhesive agent does not exist in the opposing surface of the base material 21 (refer FIG. 2) and the back surface layer 23. FIG. Moreover, the non-adhesion part 23b can also be obtained by interposing the adhesion prevention layer which prevents adhesion | attachment of the base material 21 and the back surface layer 23 between the base material 21 and the back surface layer 23. FIG.

  In addition, when using an adhesion preventing layer, the material of the adhesion preventing layer can be selected from any material such as paper or synthetic resin film, but various laces represented by polyester spunlace, nonwoven fabric, slab urethane, etc. A material having air permeability such as a porous material is preferable.

  Next, the wire harness wired on the back surface of the ceiling material 20 and the fixing structure thereof will be described with reference to FIGS. In general, various wire harnesses connected to an indoor lamp (so-called room lamp, map lamp, etc.), a rear wiper drive system, and the like are wired on the back surface layer 23. In FIG. 3, the wire harness 26 which passes the vehicle width direction center of the non-bonding part 23b is shown.

  As shown in FIG. 3, the wire harness 26 is wired from the vicinity of the outer end of the recess 24 to the front end of the non-adhesive portion 23 b, and then rearward so as to cut through the non-adhesive portion 23 b (along the vehicle length direction). Wired toward. The wire harness 26 is fixed by a plurality of adhesive tapes 27.

  As shown in FIG. 4, the non-adhesive portion 23 b is provided with a hole 28 that partially exposes the back surface of the base material 21. The wire harness 26 is fixed to the exposed surface 21 a exposed from the hole 28 with an adhesive tape 27. The adhesive tape 27 is, for example, a single-sided tape in which an adhesive is applied on one side.

  The hole 28 has a rectangular shape in plan view. The width dimension W of the hole 28 (dimension in the direction perpendicular to the axis of the wire harness 26) is set to be larger than the width dimension W1 of the wire harness 26 and about the same as or smaller than the length L1 of the adhesive tape 27. It is preferred that The length L of the hole 28 (the dimension in the direction along the axis of the wire harness 26) is preferably set to be approximately the same as or smaller than the width W2 of the adhesive tape 27.

  As shown in FIG. 5, the wire harness 26 is fixed with an adhesive tape 27 in a state where it is in contact with the exposed surface 21 a. In this example, the wire harness 26 is placed in the center of the exposed surface 21a in the width direction, and the adhesive tape 27 is attached to the wire harness 26, the exposed surface 21a, and the non-adhesive portion 23b. Thus, the wire harness 26 is directly fixed to the base material 21 by sticking the adhesive tape 27.

  Next, an example of processing the hole 28 will be described with reference to FIG. For the processing of the hole 28, for example, a method in which an outer layer of the laminate is cut and only a part of the outer layer is peeled off (so-called kiss cutting method) can be used.

  When the kiss cutting method is used, in accordance with the contour of the hole 28, as shown in FIG. 6A, a cut 32 is made in the non-adhesive portion 23b with a cutting blade 31 (arrow (1)). At this time, the tip of the cutting blade 31 stops just before the back surface of the base material 21, and cuts only the non-adhesive portion 23b. Next, as shown in FIG. 6B, the piece 33 surrounded by the notch 32 is peeled off from the base material 21 (arrow (2)). Then, a hole 28 penetrating through the non-bonding portion 23b is formed. Through this hole 28, a part of the base material 21 (exposed surface 21 a) is exposed.

  And as shown in FIG.6 (c), the wire harness 26 is mounted on the exposed surface 21a (arrow (3)), and it fixes with the adhesive tape 27 (arrow (4)). As a result, the fixing structure of the wire harness 26 shown in FIG. 5 is obtained.

  In addition, the processing method of the hole 28 is not restricted to the kiss cut processing method, If it is a processing method which can expose the base material 21 partially, it is arbitrary. For example, the hole 28 may be formed by melting only the non-bonded portion 23b with heat along the outline of the hole 28 and removing a piece surrounded by the melted portion.

The effect | action of the ceiling material 20 described above is demonstrated based on FIG.
As shown in FIG. 7, the non-bonding portion 23b is not bonded to the base material 21, and can vibrate in the direction indicated by the arrow (5). Therefore, the sound absorption effect by the membrane vibration of the non-bonding part 23b is obtained. On the other hand, since the wire harness 26 is directly fixed to the exposed surface 21 a of the base material 21, it is difficult to move with respect to the base material 21. Therefore, according to the vehicular ceiling member 20 of the present embodiment, the sound absorption performance can be improved, and flapping of the wire harness 26 can be prevented.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  For example, the means for fixing the wire harness to the exposed surface of the substrate is not limited to single-sided tape, but can be selected from any fixing means such as double-sided tape, adhesive, and screw member.

DESCRIPTION OF SYMBOLS 10 Vehicle 14 Car interior 20 Vehicle ceiling material 21 Base material 21a Exposed surface 22 Skin layer 23 Back surface layer 23a Adhesion part 23b Non-adhesion part 28 Hole 26 Wire harness

Claims (1)

Wired to the back surface of the base material, the skin layer provided on the front surface side of the base material and forming the ceiling surface in the vehicle interior, the back surface layer for venting provided on the back surface side of the base material, and the back surface layer A vehicle wiring harness having a wire harness,
The back surface layer is formed on the non-adhesive portion, the adhesive portion that is adhered to the back surface of the base material, the non-adherable portion that is not adhered to the back surface of the base material, and the back surface of the base material is partially A hole to be exposed,
The ceiling material for vehicles, wherein the wire harness is fixed to an exposed surface of the base material exposed from the hole.

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