JPH11321476A - Pillar garnish molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfy a requirement of an antinomical characteristic of a heat- resistant form retaining property and an anti-low temperature impact property by integrally forming a flexible covering layer capable of unseparately connecting and supporting a molded product body at the time of a rupture thereof on an inner side surface of the molded product body formed with a synthetic resin material having the heat-resistant form retaining property. SOLUTION: A molded product body 32 is formed with a synthetic resin material having a heat-resistant form retaining property and a flexible covering layer 52 capable of unseparately connecting and supporting the molded product body 32 at the time of a rupture thereof is integrally formed on an inner side surface of the molded product body 32. The synthetic resin material having the heat-resistant form retaining property includes, for example, a material having a thermal deformation temperature (4.6 kgf/cm<2> ) (ASTM D 648) of 80 deg.C or more, desirably 100 deg.C or more. Whereas a forming material of the flexible covering layer 52 can include various kinds of thermoplastic elastomers and a synthetic rubber. The thermoplastic elastomers are preferable from the point of view of simultaneous molding and the synthetic rubber is preferable in the case of forming the layer 52 by coating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pillar garnish molded product in which a molded product main body includes a long base portion and a door portion for a bag which is integral hinged along one side of the base portion. About.

[0002] In addition, although a front pillar will be described as an example of the pillar, the present invention can be applied to a rear pillar.

[0003]

2. Description of the Related Art In response to the recent demand for increased protection of occupants in automobiles, various side airbag devices for protecting the occupant's head have been proposed (JP-A-9-240409 / 31).
No. 5253). The outline of those side airbag devices is as follows.

[0004] A side airbag device to which the pillar garnish molded product of the present embodiment is applied has an inflator and an airbag. The inflator is usually cylindrical in relation to the storage space, and is mounted near the door belt line on the inside of the front pillar (inner panel). The airbag includes a cylindrical air inflow port for connecting an inflator, and a protection curtain portion having a substantially parallelogram in a developed shape. In the airbag, the protective curtain portion is folded into a long length, and the vehicle body (body) is attached from the front pillar, which is a constituent member, to the roof side rail.

The present inventors have previously proposed a pillar garnish having the following general configuration (Japanese Patent Application No. 9-129617, unpublished at the time of filing).

[0006] The pillar garnish usually comprises a molded part integrally formed of a plastic material, and a skin part to cover the design side surface of the molded part. The molded part is a long base part and one side of the base part. With a door part for a bag, which is integral hinged along the line, and furthermore, a bolt fastening which can be secured to both ends of the back surface of the base part by engaging means by a retaining fitting (engaging pin) or by screwing. A seat boss is formed.

[0007]

The pillar garnish molded product of the above-mentioned type is required to have a trade-off characteristic of heat-resistant form retention and low-temperature impact resistance, and a special impact-resistant material such as TPO which can satisfy both characteristics. Was using a conductive material,
In addition to being expensive, it was still difficult to satisfy sufficient heat-resistant form retention.

[0008] In view of the above, an object of the present invention is to provide a pillar garnish molded product that can easily satisfy the requirements of the trade-off characteristics of heat-resistant form retention and low-temperature impact resistance.

[0009]

Means for Solving the Problems The present inventors have made intensive development efforts to solve the above-mentioned problems, and as a result, have arrived at a pillar garnish molded product having the following structure.

In a pillar garnish molded product, a molded product main body includes a long base portion and a bag door portion integral-joined along one side of the base portion.
A molded product body is formed of a synthetic resin material having heat-resistant form retention, and a flexible coating is provided on the inner surface of the molded product body so that the molded product body can be inseparably connected and supported when the molded product body is broken. It is characterized in that the layers are integrally formed.

[0011]

As described above, the pillar garnish molded article of the present invention has a molded article body formed of a synthetic resin material having heat-resistant form retention, and a molded article formed on the inner surface of the molded article body. When the main body is broken, a flexible coating layer capable of inseparably connecting and supporting the molded product main body is integrally formed, so that the following operations and effects can be obtained.

In a pillar garnish molded product, the molded product main body includes a long base portion and a bag door portion that is integrally hinged along one side of the base portion.
It is easy to satisfy the requirements of the trade-off characteristics of heat-resistant form retention and low-temperature impact resistance.

The heat-resistant form retention is carried by a molded article body formed of a synthetic resin material, and the lack of low-temperature impact resistance of the molded article body is determined by a flexible coating layer formed on the inner surface of the molded article body. This makes it possible to prevent the fragments from being scattered and compensate.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing a mounting state of a pillar garnish molded product according to the present embodiment, FIG. 2 is a schematic perspective view similarly viewed from the back side, and FIG. It is an expanded sectional view. It should be noted that the symbol “D” indicates a door body.

The side airbag device 12 to which this embodiment is applied has an inflator 14 and an airbag 16. The inflator 14 is usually cylindrical in view of the storage space, and is attached to the inside of the front pillar 18 (inner panel) near the door belt line BL. The airbag 16 includes a cylindrical air inlet 22 for connecting the inflator 14 and a protective curtain portion 24 having a substantially parallelogram in a developed shape. In the airbag 16, the protective curtain portion 24 is folded into a long length, and the vehicle body (body) is attached to the roof side rail 26 from the front pillar 18, which is a constituent member. Here, the protective curtain portion 24 includes the front and back connection portion 2.
4a are formed at a plurality of locations. This is to prevent the protective curtain portion 24 from escaping in the vehicle width direction due to external force when the airbag 16 is deployed and inflated.

In this embodiment, the pillar garnish 28 has a long base 36 and a bag door 38 connected to an integral hinge 37 along one side of the base 36. Further, a mounting means is provided on the back surface of the base portion 36. The mounting means moves from the door belt line BL side to the roof side rail 26 side
It is composed of different kinds of integrated fixing means, namely, a stopper metal fitting 42, a locking clip 44 and a boss 46 for a bolt fastening seat.

The integral hinge 37 is formed with a thin portion so that the bag door 38 can be easily opened when the bag is deployed. Even if it is broken by an impact force, the broken piece is connected to and held at another portion by the flexible coating layer 52 described later, so that it does not scatter.

In the above configuration, the molded article main body 32 is formed of a synthetic resin material having heat-resistant form retention, and the molded article main body 32 is attached to the inner surface of the molded article main body 32 when the molded article main body 32 is broken. A flexible covering layer 52 that can be connected and supported inseparably is integrally formed.

Here, the flexible coating layer 52 is formed only on the inner surface of the molded article main body 32 in the illustrated example, but may be formed over the entire circumference. When formed over the entire circumference, the surface side may also serve as a design layer (decorative skin portion) for imparting a soft feeling. The reason why the flexible coating layer 52 is formed at least on the inner surface is to prevent the airbag from being damaged due to the breakage of the molded article main body 32.

The synthetic resin material having heat-resistant form retention is not particularly limited. For example, the heat distortion temperature (4.6 kg
f / cm ² ) (ASTM D 648) at 80 ° C or higher, preferably 100 ° C
The temperature may be higher than ° C, and for example, the following can be exemplified (the heat deformation temperature in parentheses). In addition, even if the heat deformation temperature of the resin itself is lower than 80 ° C., it can be used if the heat deformation temperature is improved by blending an inorganic filler. It is, of course, possible to use the temperature further increased. Of these, the price,
PP is most desirable from the balance of weather resistance and heat resistance.

High density polyethylene (PE) (~ 82
C), polypropylene (PP) (99-110 C), A
BS resin (98.9-107 ° C), AAS resin (10
7.2-110 ° C), polybutylene terephthalate (P
BT) (150-190 ° C), polyamide (PA) (150 ° C with nylon 6), polyacetal (POM) (1
70 ° C) and the like.

On the other hand, as a material for forming the flexible coating layer 52, when the molded article main body 32 is broken, the molded article main body 32 has strength and low-temperature impact resistance capable of connecting and supporting the molded article main body inseparably, and synthesizes the molded article body. There is no particular limitation as long as it can be integrally bonded to the resin material. Although various thermoplastic elastomers and synthetic rubbers can be used, from the viewpoint of simultaneous molding,
When the thermoplastic elastomer is formed by coating,
Synthetic rubber is preferred.

For example, as a synthetic resin, high density PE or PP is used.
When using a non-polar thermoplastic elastomer, in particular, an olefin-based thermoplastic elastomer (TPO) and a hydrogenated styrene-based thermoplastic elastomer (hydrogenated SBC) having no unsaturated bond from the viewpoint of weather resistance are desirable.
Similarly, ABS resin, AAS resin, PA, PB
In the case of T, POM or the like, a polar thermoplastic elastomer, for example, a thermoplastic elastomer (TPE) such as a polyester-based or polyamide-based elastomer can be used.

Among these, in particular, a block type PP (copolymer with PE) which is excellent in impact resistance as a synthetic resin, and a TPE which is excellent in adhesion to the block type PP and which has high strength. Excellent dynamic vulcanization type TP
A combination with O is desirable.

The thickness of the molded article main body 32 is a thickness that can sufficiently exhibit heat-resistant form retention, and is usually 1 to 5 mm, preferably 2 to 3 mm. The coating layer has a thickness capable of exhibiting the strength capable of supporting the connection, and is usually 0.5 to 2 mm, preferably 1 to 3 mm.

The garnish of the present invention can be manufactured in various modes, and can be manufactured by the following method.

In-mold molding: A sheet of a material forming the coating layer 52 is set in a mold by vacuum suction, and then the molded article body material is injected into the mold to form the molded article body 32. Thermal fusion is integrated.

Two-color molding (including sandwich molding): The coating layer 52 is molded by injection or the like, and the molded article main body material is injected into the same mold to form the molded article body 32. Thermal fusion is integrated.

Coating layer coating formation: A coating of a coating layer forming material is applied and cured on the inner surface or the entire surface of the molded article main body 32 after injection molding to form a coating layer. Here, the form of the coating is arbitrary such as solution type, emulsion type (aqueous / non-aqueous), plastisol, powder, etc., and the application mode is arbitrary such as dipping, spraying, etc. Do.

In the case of the above-mentioned in-mold molding and coating layer coating formation, it is a matter of course that after the primer (adhesive) is applied to the sheet or molded article main body 32, injection molding or coating layer coating is applied.

Next, the garnish (garnish molded product) 28 manufactured as described above is not indispensable, but after molding, a decorative skin portion is covered on the design surface side by means of adhesion or the like, so that the design property can be improved. It is good also as a pillar garnish which increased. Here, the decorative sheet forming the decorative skin portion is not particularly limited, but may be any fabric, leather, soft print sheet, or the like as long as it is in harmony with other interior parts in the vehicle. The thickness of the decorative sheet is usually 0.5 to 5
mm.

The garnish 28 thus prepared is mounted on the front pillar 18 constituting the vehicle body as described below.

The front pillar 18 is basically
The inner panel 18a, the outer panel 18b, and the reinforcement 18c are formed.

The pillar 18 has a metal fitting locking hole 54, a clip locking hole 56, and a nut seat hole (not shown) corresponding to the retaining metal fitting 42, the locking clip 44, and the boss 46 for the bolt fastening seat. ). As shown in FIG. 4, the lower end of the metal fitting hole 54 has a wide insertion portion 54a.
It is a keyhole-shaped thing provided with. The clip locking hole 56
It is a round hole into which the clip 44 can be inserted and can be stopped undercut. Although not shown, a weld nut is fixed to the back surface of the inner panel 18a at the position of the nut seat hole.

The folded airbag 16 is attached along the roof side rail 26 from the front pillar 18 constituting the vehicle body (side member) in advance. In particular,
After the airbag 16 is folded, the airbag 16 temporarily holds the folded shape with a strap or the like. Then, the airbag 16 is screwed and attached to each of the inner panels of the front pillar 18 and the roof side rail 26 via attachment margins 16a formed at a plurality of locations along the upper edge of the folded airbag 16 (see FIG. 1). ).

In this state, after the locking head 42a of the stopper fitting 42 is inserted into the wide insertion portion 54a of the fitting locking hole 54,
While pulling the pillar garnish 28 toward the roof side rail 26, the locking clip 44 is inserted into the clip locking hole 56.
Then, the bolt boss 46 is screwed into the weld nut (not shown) so as to correspond to the weld nut (not shown), and the pillar garnish 28 is fixed to the front pillar 18. And
Complete the installation.

Finally, a door weatherstrip 60 having a trim portion 58 for closing a gap between the front pillar 18 and the bag door portion 38 of the pillar garnish 28 is attached to the sheet metal flange portion 19 of the front pillar 18.

The airbag 16 attached to the roof side rail 26 is covered by the side edge of the ceiling board 30.

Thus, the pillar garnish 28 stores the folded long airbag 16 between the front panel 18 and the inner panel 18a. When the airbag device 12 operates, the airbag 16 is deployed and expanded by the gas flowing from the inflator 14.
Swell. By the deployment / inflation output of the airbag 16,
The door 38 of the molded body 32 is about to open. At this time,
Since the integral hinge portion 37 of the molded body 32 is a thin-walled portion, the bag door 38 is rotated and opened, and the airbag jumps out quickly and smoothly, and expands and expands in a curtain shape.

When the airbag apparatus is operated, the molded article main body 32 receives an impact force and does not have low-temperature impact resistance.
There is a possibility of breaking at a fragile portion including the integral hinge 37.

However, even if it breaks, the broken fragments are connected and supported by the flexible coating layer 52 formed on the inner side surface of the molded article main body 32, so that there is no problem because scattering is prevented.

In this embodiment, the flexible coating layer 32
Are formed on the entire inner surface of the molded product body 32 (all the back surfaces of the base portion 36, the integral hinge 37, and the bag door portion 38), but there is no possibility of breakage when the airbag 16 is deployed and inflated. The inner surface (back surface) of the base portion 36
It may be partial as long as the function of the present invention (connection support of broken fragments) is achieved.

Further, the mode of the means for attaching the garnish is as follows.
The invention is not limited to the above example. In the present invention,
The flexible coating layer on the inside can prevent breakage and separation caused by molding the molded product body with a synthetic resin material that has heat-resistant form retention, increasing the flexibility in designing the bending strength of the integral hinge. To do that.

[Brief description of the drawings]

FIG. 1 is a side view of a mounting mode of a pillar garnish molded product according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view similarly viewed from the back side.

FIG. 3 is an enlarged sectional view of the mounting mode.

FIG. 4 is a plan view of a back surface of a stopper fitting locking hole formed in a front pillar.

[Explanation of symbols]

Reference Signs List 12 side airbag device 14 inflator 16 airbag 18 front pillar 26 roof side rail 28 pillar garnish (pillar garnish molded product) 32 molded product main body 36 base portion 37 integral hinge 38 bag door portion 52 flexible covering layer BL belt line

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Tajima 1 Ochiai Nagahata, Kasuga-machi, Nishikasugai-gun, Aichi Prefecture Inside Toyoda Gosei Co., Ltd. Inside Toyoda Gosei Co., Ltd. (72) Inventor Masao Tanaka 1 Nagasaki Ochiai, Kasuga-cho, Nishikasugai-gun, Aichi Prefecture Toyoda Gosei Co., Ltd.

Claims (2)

[Claims] 1. A pillar garnish molded product, wherein the molded product main body includes a long base portion and a bag door portion that is integral hinged along one side of the base portion. Molded with a synthetic resin material having heat-resistant form retention, and on the inner surface of the molded article body,
A pillar garnish molded product, wherein a flexible coating layer capable of inseparably connecting and supporting the molded product body when the molded product body is broken is integrally formed. 2. The molded article main body is formed of a polyolefin resin, the flexible coating layer is formed of a non-polar thermoplastic elastomer, and the molded article main body and the flexible coating layer are thermally fused. A pillar garnish molded product characterized by being worn.