JP3963249B2 - Automotive interior parts - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to automotive interior parts such as center pillar trims, rear side trims, door trims and the like that are installed in a side wall panel of a vehicle body, and particularly, when a load is applied during deployment of side airbags, Or, it relates to automobile interior parts that can prevent scattering and have excellent safety.
[0002]
[Prior art]
FIG. 9 shows a rear side trim 1 installed in a rear side panel of a vehicle. In order to improve appearance performance and to make a molding die compact, the rear side trim 1 is formed by an upper and lower parts of a trim upper 2 and a trim lower 3. It is composed of two parts.
[0003]
The trim upper 2 is composed of a laminated structure in which a skin is integrally formed when a molten resin such as PP (polypropylene) resin is molded into a required shape by mold press molding. On the other hand, the trim lower 3 uses a single component such as an injection-molded body of a synthetic resin such as PP resin or a mold press-molded body.
[0004]
Incidentally, FIG. 10 shows the structure of the front side edge of the rear side trim 1, and in recent years, in order to protect an occupant in the event of an accident or the like, airbags are installed in various parts. Corresponding to the side airbag provided on the side of the seat back of the seat, rubber is used as the resin material of the trim lower 3 so that the trim lower 3 is not cracked and fragments are not scattered when the airbag is deployed. While using materials, as shown in FIGS. 10 and 11, the fact is that the lattice-like ribs 4 are integrally formed on the back surface of the portion corresponding to the side airbag to enhance the rigidity.
[0005]
[Problems to be solved by the invention]
As described above, rubber-based materials are used in the locations corresponding to the side airbags so that the resin base material of the interior parts is not broken or the fragments are scattered with respect to the load from the side airbags. Although the rib 4 is integrally formed on the back surface, for example, when using a rubber-based material, the fluidity of the resin cannot be expected so much, so it is greatly restricted in shaping and requires severe molding conditions. Therefore, the problem that management is troublesome is pointed out.
[0006]
Further, since the lattice-like ribs 4 are integrated on the back surface side, sink marks or the like are likely to occur on the product surface, and the problem that the appearance performance of the product is deteriorated in addition to the difficulty of mold processing is pointed out. .
[0007]
The present invention has been made in view of such circumstances, and provides an automotive interior part that can suppress cracking and scattering of a resin base material when a side airbag is deployed, and that can be manufactured easily and inexpensively. It is an object.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 of the present application includes a resin base material formed by molding a synthetic resin into a desired curved surface shape, and is mounted on a side wall panel of a vehicle body. And, in the side impact area facing the side airbag in the automotive interior part, a fabric sheet is affixed to the back surface of the resin base material via a hot melt adhesive, and when the side airbag is deployed, It is characterized by suppressing cracking and scattering of the resin base material.
[0009]
Here, the interior part is not particularly limited as long as it is provided at a corresponding portion of the side airbag, and can be applied to a center pillar trim, a rear side trim, a door trim, and the like.
[0010]
Nonwoven fabrics, woven fabrics, knitted fabrics, and the like can be applied as the fabric sheet bonded to the back surface of the resin base material in the side impact area via a hot melt adhesive. An example of the hot melt adhesive is polyethylene.
[0011]
And according to the invention of claim 1, since the cloth sheet is integrated via the hot melt adhesive on the back surface of the resin base material in the side impact area, cracking and scattering of the resin base material are suppressed, General-purpose synthetic resin materials other than rubber-based materials can be used as the resin material for the resin base material.
[0012]
Furthermore, when the side airbag is deployed, even if deployment pressure is applied to the resin base material, it can absorb instantaneous deflection and suppress cracking as much as possible. For example, even if it breaks, it is backed by a cloth sheet. As a result, debris will not scatter.
[0013]
In a preferred embodiment of the present application , there is provided an automotive interior part that includes a resin base material formed by molding a synthetic resin into a desired curved surface shape and is mounted on a side wall panel of a vehicle body. The side impact area facing the side airbag is characterized in that a film for preventing cracking and scattering of the resin base material is attached to the back surface of the resin base material.
[0014]
Here, as the resin film, a butyl resin tape, an acrylic resin tape or the like can be used.
[0015]
And according to the said embodiment , since the film is affixed on the resin base material back surface in a side impact area, it can absorb the instantaneous bending of a resin base material with respect to the pressing force at the time of side airbag deployment. Moreover, scattering of fragments can be prevented.
[0016]
The invention according to claim 2 of the present application is an automotive interior part that includes a resin base material formed by molding a synthetic resin into a desired curved surface shape and is mounted on a side wall panel of a vehicle body. In the side impact area facing the side airbag in the part, a fabric sheet is affixed to the back surface of the resin base material via a hot melt adhesive to prevent the resin base material from being scattered when the side airbag is deployed. A spacer pad is integrated with the back surface of the cloth sheet.
[0017]
Here, as the spacer pad, a synthetic resin foam molded body such as a foam bead molded body (PP bead, PE bead, PS bead, etc.) or polyurethane foam can be used.
[0018]
According to the second aspect of the invention, the cloth base sheet can prevent the resin base material from being scattered when the side airbag is deployed, and the spacer pad functions as a spacer. Deflection can be suppressed.
[0019]
In the invention according to claim 3 of this application, the cloth sheet and the spacer pad are integrated with each other through an adhesive tape, and a rib for preventing the pad from falling off is integrated with the back surface of the resin base material below the spacer pad. It is characterized by being.
[0020]
According to the third aspect of the present invention, since the pad drop prevention rib protrudes on the back surface of the resin base material at the lower part of the spacer pad, even if the adhesive tape between the fabric sheet and the spacer pad deteriorates. The spacer pad is not dropped by this rib.
[0021]
The invention according to claim 4 of this application is characterized in that a plurality of openings are provided in the cloth sheet, and the hot melt adhesive is bonded to the spacer pad through the plurality of openings.
[0022]
Here, when using a nonwoven fabric as a fabric sheet, the basis weight is 50 to 200 g / m ^2, preferably from of about 100 g / m ^2. Further, the pitch interval of the openings is 15 to 30 mm in the vertical and horizontal directions, preferably 20 mm, and the size of the openings is 8 to 10 mm in diameter.
[0023]
According to the invention described in claim 4 , even when the adhesive tape for bonding the fabric sheet and the spacer pad is deteriorated, the hot melt adhesive is bonded to the spacer pad through the plurality of openings provided in the fabric sheet. Therefore, the holding strength of the spacer pad is enhanced.
[0024]
The invention according to claim 5 of this application is characterized in that a protrusion that fits into the opening is provided on the spacer pad corresponding to the opening provided in the cloth sheet.
[0025]
According to the invention described in claim 5 , since the protrusions having substantially the same shape as the openings are provided on the surface facing the spacer pad corresponding to the plurality of openings provided in the cloth sheet, the opening of the cloth sheet is provided. Since the spacer pad and the hot melt are reliably in contact with each other through the spacer pad, the spacer pad can be held more firmly.
[0026]
According to a sixth aspect of the present application, the spacer pad is provided with a corresponding concave portion corresponding to the plurality of openings formed in the cloth sheet, and the hot melt adhesive is provided in the cloth sheet opening and the spacer. The spacer pad is held by solidifying in a state of entering the recess of the pad.
[0027]
According to the invention described in claim 6 , since the recess is formed in the spacer pad corresponding to the plurality of openings of the cloth sheet, the hot melt is formed in the opening of the cloth sheet and the recess of the spacer pad. The penetration strength of the adhesive can enhance the holding strength of the spacer pad due to the anchor effect after the hot melt adhesive is solidified.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an automotive interior part according to the present invention will be described in detail with reference to the accompanying drawings.
[0029]
1 is an external view of a rear side trim to which the present invention is applied, FIG. 2 is a cross-sectional view showing the configuration of the first embodiment of the present invention, FIG. 3 is a cross-sectional view showing the configuration of the second embodiment of the present invention, and FIG. Is a sectional view showing the configuration of the third embodiment of the present invention, FIG. 5 is a sectional view showing an improved example of the third embodiment of the present invention, and FIG. 6 is a sectional view showing an improved example of the third embodiment of the present invention. 7 is a sectional view showing an improved example of the third embodiment of the present invention, and FIG. 8 is an external view showing another embodiment of the rear side trim.
[0030]
In FIG. 1, the overall configuration of the rear side trim 10 will be described. First, the rear side trim 10 is mounted on the indoor side of a rear side panel (not shown) of a one-box car, and in order to improve the appearance performance and make the mold structure compact at the time of molding, The trim upper 20 and the trim lower 30 are divided into upper and lower parts.
[0031]
The rear side trim 10 is adjacent to three types of pillar trims, a center pillar trim 11, a rear pillar trim 12, and a back pillar trim 13, from the front to the rear along the upper edge thereof.
[0032]
As shown in FIG. 2, the trim upper 20 is molded into the required shape shown in the figure by molding press molding PP resin mixed with talc. At the time of molding press molding, a TPO (thermoplastic olefin) sheet or the like is formed. Are integrally formed with the outer skin 22.
[0033]
On the other hand, the trim lower 30 is composed of a resin base material 31 formed by molding press molding PP resin mixed with talc into a required shape, and a storage box 32 is attached to the front side slightly from the center in order to improve functionality. In addition, an opening / closing lid 33 capable of accommodating a tool or the like is attached to the rear side edge portion so as to be opened and closed.
[0034]
By the way, the rear side trim 10 to which the automotive interior part according to the present invention is applied increases the safety at the time of deployment of the side airbag, increases the degree of freedom of the selection material of the resin base material 31 in the trim lower 30, and reduces the molding conditions. It has the advantage that it can be significantly relaxed.
[0035]
That is, in the side impact area (indicated by A in FIG. 1), the cloth sheet 40 is integrated on the back surface of the resin base material 31 via the hot melt adhesive 50. Nonwoven fabric, woven fabric, knitted fabric, or the like can be applied to the fabric sheet 40, and the hot melt adhesive 50 uses polyethylene resin in this embodiment.
[0036]
Since the cloth sheet 40 is integrated with the back surface of the resin base material 31 in the trim lower 30 via the hot melt adhesive 50, the resin base material 31 bends when the side airbag is deployed at the time of a side collision. However, the bending stress can be absorbed by the hot melt adhesive 50 and the cloth sheet 40, and the damage of the resin base material 31 is suppressed. Even if the resin base material 31 is damaged, the cloth sheet 40 is subjected to a backing process. Therefore, no debris is scattered and an unexpected accident can be prevented.
[0037]
In addition, with a simple configuration in which the cloth sheet 40 is integrated through the hot-melt adhesive 50, a general-purpose synthetic resin material such as PP is used as the resin material of the resin base 31 instead of the conventional rubber material. Resin, ABS resin, PP resin mixed with talc, etc. can be used, and these general-purpose synthetic resins have high MI value, high fluidity, and excellent moldability, so that the shape of parts can be freely set and molded There are various advantages such as ease of conditions.
[0038]
In addition, since it is not necessary to provide a conventional grid-like rib, appearance defects such as sink marks do not occur on the product surface, and the appearance function is excellent.
[0039]
FIG. 3 shows a second embodiment of the present invention. The application site is the side impact area A of the trim lower 30 in the rear side trim 10, and the side impact area on the back surface of the resin base 31 as shown in FIG. A film 60 is affixed to A.
[0040]
As the film 60, butyl tape, acrylic tape, or the like can be used. The film 60 may be bonded and fixed to the back surface of the resin base material 31 via an adhesive, and the film 60 can be integrated by insert molding when the resin base material 31 is formed.
[0041]
Even in this case, the backing action of the film 60 is effective in preventing the resin base material 31 from being scattered in the trim lower 30 when the side airbag is deployed. The same effects as the first embodiment are provided, such as no appearance defects.
[0042]
Next, FIG. 4 shows a third embodiment of the present invention, and the application location is a portion corresponding to the side airbag of the trim lower 30 in the rear side trim 10. That is, as shown in FIG. 4, the nonwoven fabric 41 is integrated with the back surface of the resin base material 31 in the side impact area A via the hot melt adhesive 50, and the spacer pad 70 is formed on the back surface of the nonwoven fabric 41. Are integrated through a double-sided adhesive tape 80.
[0043]
More specifically, the hot melt adhesive 50 uses a polyethylene resin. Further, the nonwoven fabric 41 is a polyester, a polypropylene blend nonwoven, its basis weight is 50 to 200 g / m ^2, but preferably from of about 100 g / m ^2, as fabric sheet 40 of the above embodiment, woven Cloth or knitted fabric may be used.
[0044]
On the other hand, the spacer pad 70 uses a PP bead foam molded body molded in advance into a required shape in this embodiment. In addition, PE bead foam moldings and PS (polystyrene) bead foam moldings can be used, and other synthetic resin foam moldings (polyurethane foam, etc.) can also be used. Further, the double-sided adhesive tape 80 is a butyl tape.
[0045]
And in this 3rd Embodiment, although the nonwoven fabric 41 and the hot-melt-type adhesive agent 50 have the same function of preventing cracking and scattering of the resin base material 31 in the door trim lower 30, the nonwoven fabric 41 is further used. Since the spacer pad 70 is integrated with the back surface of the resin substrate via the double-sided adhesive tape 80, the deformation of the resin base material 31 can be suppressed by the spacer function of the spacer pad 70 during the deployment operation of the side airbag. It is possible to prevent the material 31 from cracking.
[0046]
Further, in the third embodiment, in order to prevent the spacer pad 70 from falling off due to deterioration of the double-sided adhesive tape 80, a pad falling-off preventing rib 34 is provided on the back surface of the resin base material 31. .
[0047]
Next, FIGS. 5 to 7 show examples of improvements of the third embodiment. In the embodiment shown in FIG. 5, the retaining strength of the spacer pad 70 is enhanced and the drop prevention rib 34 is eliminated. is there. That is, in the nonwoven fabric 41, a plurality of round openings 42 are set at predetermined pitch intervals in the vertical and horizontal directions, for example, 15 to 30 mm intervals, preferably 20 mm intervals, and opening diameters 8 to 10 mm.
[0048]
Accordingly, the hot melt adhesive 50 adheres to the spacer pad 70 through the opening 42 provided in the nonwoven fabric 41, so that the spacer pad 70 is bonded to the nonwoven fabric 41 by the double-sided adhesive tape 80, and the hot melt adhesive 50. The spacer pad 70 can be more firmly held by the adhesive force with the adhesive 50 and the anchor effect that the hot melt adhesive 50 enters into the opening 42.
[0049]
Further, since the rib 34 for preventing the pad from falling off can be eliminated, there is no problem such as a sink on the product surface, and the die processing can be simplified.
[0050]
Similarly, FIGS. 6 and 7 are other improvements in which the holding strength of the spacer pad 70 is strengthened. As shown in FIG. 6A, the circular shape of the non-woven fabric 41 is formed on the surface of the spacer pad 70 facing the non-woven fabric 41. A disc-shaped protrusion 71 having the same shape is formed corresponding to the opening 42.
[0051]
Accordingly, as shown in FIG. 6B, the disc-shaped protrusion 71 of the spacer pad 70 is fitted into the opening 42 of the nonwoven fabric 41, and the adhesive force between the nonwoven fabric 41 and the spacer pad 70 is adhered to the double-sided adhesive tape 80. Even if the force is deteriorated, the mechanical connection in which the disk-shaped protrusion 71 of the spacer pad 70 is fitted in the opening 42 of the nonwoven fabric 41 and the top surface of the disk-shaped protrusion 71 adheres to the hot melt adhesive 50. Thus, the holding strength of the spacer pad 70 can be further strengthened.
[0052]
Similarly, as shown in FIG. 7A, a circular recess 72 is formed in the spacer pad 70 corresponding to the opening 42 of the nonwoven fabric 41, and as shown in FIG. The hot melt adhesive 50 penetrates into the opening 42 and the circular recess 72 of the spacer pad 70, and the hot melt adhesive 50 is solidified, whereby the spacer pad 70 can be firmly held by anchor bonding. The holding strength of the pad 70 can be strengthened.
[0053]
Further, in the embodiment described above, the present invention is applied to the side airbag corresponding portion (side impact area A) in the rear side trim 10 of the upper and lower divided configuration of the trim upper 20 and the trim lower 30 as shown in FIG. The rear side trim 10 can also be applied when an integrated type is used. In this case, the above-described embodiment may be applied to the side impact area A below the center pillar trim 11.
[0054]
【The invention's effect】
As described above, the automotive interior component according to the present invention is installed in the side wall panel of the vehicle body, and the fabric sheet for preventing cracking and scattering on the back surface of the resin base material in the side impact area corresponding to the side airbag or the side Since the fabric sheet is affixed to the back side of the resin base material in the impact area via a hot melt adhesive, and the spacer pad is integrated with the back side of the fabric sheet, the side airbag is deployed during a side impact. Even so, the bending of the resin base material can be absorbed sufficiently, the resin base material can be reliably prevented from cracking and debris from being scattered, the durability of the parts can be improved, and the safety of passengers can be protected. It has the effect.
[0055]
Further, according to the automotive interior part of the present invention, the cloth sheet is integrated with the back surface of the resin base material in the side impact area via the hot melt adhesive , or the cloth sheet via the hot melt adhesive. And further, the spacer pad is integrated on the back surface thereof, so that the resin base material is not limited to a rubber-based material, and a general-purpose inexpensive resin material can be used, and Since a resin material excellent in moldability can be used, there is an effect that it is possible to provide an automotive interior part that is excellent in cost and modeling.
[0056]
In addition, according to the automotive interior part according to the present invention, since the conventional grid ribs can be eliminated, there is an effect that a good appearance performance can be obtained without causing appearance defects such as sink marks in the product appearance. Have.
[Brief description of the drawings]
FIG. 1 is an external view showing a rear side trim to which the present invention is applied.
FIG. 2 is a cross-sectional view showing a configuration of a side impact area portion in the first embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a configuration of a side impact area portion in a second embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a configuration of a side impact area portion in a third embodiment of the present invention.
FIGS. 5A and 5B are improvements of the third embodiment according to the present invention, and FIG. 5A is a perspective view of a nonwoven fabric, and FIG. 5B is a cross-sectional view showing a configuration of a side impact area portion.
6A and 6B are improved examples of the third embodiment of the present invention, and FIG. 6A is an external view of a spacer pad, and FIG. 6B is a cross-sectional view showing a configuration of a side impact area portion.
FIGS. 7A and 7B are improved examples of the third embodiment of the present invention, and FIG. 7A is an external view of a spacer pad, and FIG. 7B is a cross-sectional view showing a configuration of a side impact area portion.
FIG. 8 is a front view showing an integrated rear side trim to which the present invention is applied.
FIG. 9 is an external view of a conventional rear side trim.
FIG. 10 is a perspective view showing a side impact area portion in a conventional rear side trim.
11 is a cross-sectional view taken along line XI-XI in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Rear side trim 11 Center pillar trim 12 Rear pillar trim 13 Back pillar trim 20 Trim upper 30 Trim lower 31 Resin base material 32 Fixture storage box 33 Opening and closing lid 34 Pad fall prevention rib 40 Fabric seat 41 Fabric seat (nonwoven fabric)
42 Opening 50 Hot-melt adhesive 60 Film 70 Spacer pad 71 Disc-shaped protrusion 72 Circular recess 80 Double-sided adhesive tape

Claims (6)

A vehicle interior part provided with a resin base material (31) formed by molding a synthetic resin into a desired curved surface shape and mounted on a side wall panel of a vehicle body, the side facing the side airbag in the vehicle interior part In the impact area (A), a cloth sheet (40) is attached to the back surface of the resin base material (31) via a hot-melt adhesive (50) , and the resin base material (31) is deployed when the side airbag is deployed. ) Automotive interior parts characterized by reduced cracking and scattering. A vehicle interior part provided with a resin base material (31) formed by molding a synthetic resin into a desired curved surface shape and mounted on a side wall panel of a vehicle body, the side facing the side airbag in the vehicle interior part In the impact area (A), a fabric sheet (41) is attached to the back surface of the resin base material (31) via a hot melt adhesive (50), and the resin base material (31) at the time of deployment of the side airbag is attached . An automotive interior part characterized by preventing scattering and further integrating a spacer pad (70) on the back surface of the cloth sheet (41). The cloth sheet (41) and the spacer pad (70) are integrated with each other through an adhesive tape (80), and a pad drop-off prevention rib (34) is provided below the spacer pad (70) with a resin base material ( 31) The automobile interior part according to claim 2 , wherein the interior part is integrated with the back surface. The fabric sheet (41) provided with a plurality of openings (42), claims a hot melt adhesive through the plurality of apertures (42) (50), characterized in that bonded to the spacer pads (70) 2. Automotive interior parts according to 2. The corresponding to the opening (42) provided in the fabric sheet (41) spacer pads (70), according to claim, characterized in that Mari writing protrusion fitted into the opening (42) (71) is provided 4 Automotive interior parts as described in 1. The spacer pad (70) is provided with a corresponding recess (72) corresponding to the plurality of openings (42) formed in the cloth sheet (41), and the hot melt adhesive (50) is applied to the cloth sheet ( by solidifying a state having entered the recess (72) in the opening (42) and spacer pads (70) of 41), according to claim 4, characterized in that the spacer pad (70) is held Automotive interior parts.

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