JPH09286293A - Instrument panel integrally provided with air bag door part and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To check the scattering of a resin portion in an air bag door hinge part in time of unfolding an air bag body as well as to make the unification of an instrument panel and an air bag door achievable. SOLUTION: An instrument panel 10 is formed into a layer-built structure consisting of an instrument panel body base material 20 made of a hard resin, a barrier layer 22 and an outer layer material 24. This instrument panel 10 is composed of a body part 28, a rectangular air bag door part 30 integrally formed with this body part 28 at a part being opposed to an air bag system 12, and two metallic long fiber aggregates 38 and 42 impregnated with the barrier layer 22 and the instrument body base material 20 between both of them are embedded in each of hinge parts 36 and 40, while two notches 37 and 41 for hinge use are formed each from the instrument panel body base material side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instrument panel integrally having an airbag door portion and a manufacturing method thereof, and more particularly to an instrument panel integrally having an airbag door portion of a passenger airbag device and the same. It relates to a manufacturing method.

[0002]

2. Description of the Related Art Conventionally, an air bag device mounted on a vehicle such as an automobile is known to have a structure for preventing a part of the air bag door from scattering when the air bag body is deployed. Is disclosed in Japanese Utility Model Publication No. 52-12257.

As shown in FIG. 9, in this airbag device 70, an airbag bag 72 and an airbag cover 74 are provided.
The cushion cover 76 interposed between the cushion cover 76 and the cushioning material 78 such as urethane foam is attached to the end portion 80 of the mesh sheet 80.
Ends 80A, 80 of the mesh sheet 80 exposed from the cushioning material 78 are configured by embedding A and 80B.
B is fixed to the attachment portion 82 of the airbag device 70 together with the end portions 74A and 74B of the airbag cover 74 to prevent the cushion cover 76 from scattering when the airbag bag body 72 is deployed.

[0004]

However, in the airbag device 70, the cushioning material 78 is provided on the mesh-like sheet 8.
Even if 0 is buried, the airbag cover 74 may be broken and scattered at the portions 84 and 86 that serve as hinges when the airbag body is deployed. Therefore, the airbag cover 74 is made of a relatively soft thermoplastic elastomer material that is hard to crack and has a low bending elastic modulus. However, this relatively soft thermoplastic elastomer material is too soft for an instrument panel and causes problems such as thermal deformation. Therefore, using this elastomer material, the instrument panel and a part of this instrument panel are used. It was difficult to integrate it with the airbag door that is opened when the airbag body provided in the instrument panel is deployed.

In consideration of the above facts, the present invention suppresses the scattering of resin component at the hinge portion of the airbag door when the airbag body is deployed, and makes it possible to integrate the instrument panel and the airbag door. An object of the present invention is to obtain an instrument panel having a single unit and a method for manufacturing the same.

[0006]

According to a first aspect of the present invention, a skin material, a barrier layer, and an instrument panel main body made of a hard resin are laminated in this order, and the passenger seat due to the inflation pressure of the airbag bag at the time of collision. An instrument panel integrally having an airbag door portion that is cleaved from a fragile portion provided at a position facing each other and expands around a hinge portion, wherein the barrier layer in the hinge portion and the instrument panel main body base material And a metal long-fiber aggregate or a metal net-like structure embedded by being impregnated between the two, and the hinge portion is formed from the instrument panel body base material side, in the middle of the instrument panel body base material It has a notch for a hinge that extends up to.

Therefore, since a part of the metallic long fiber aggregate or the metallic net-like structure is impregnated also in the instrument panel body base material side, the substantial resin content in the hinge portion of the airbag door is extremely small. Therefore, scattering of the resin component due to bending of the hinge portion can be suppressed. Further, as a bridge between the instrument panel main body and the airbag door portion, since the metal long fiber aggregate or the metal net-like structure has a sufficient bonding force, the airbag door portion is separated from the instrument panel main body portion. It does not come off.

According to a second aspect of the present invention, a skin material, a barrier layer, and an instrument panel main body made of hard resin are laminated in this order, and are provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of collision. A method of manufacturing an instrument panel integrally having an airbag door portion that is split from a fragile portion and expands around a hinge portion, wherein a portion of the barrier layer lined with a skin material that serves as a hinge portion is heated with metal. Press the long fiber aggregate or metal net-like structure to impregnate it into the resin of the barrier layer, then set it in the mold and insert-mold the instrument panel body substrate made of hard resin material. By doing so, a part of the metallic long fiber aggregate or the metallic net-like structure is also impregnated into the instrument panel body base material side.

Therefore, it can be manufactured by a simple method using conventional equipment. According to a third aspect of the present invention, an instrument integrally having an airbag door portion that is split from a fragile portion provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of a collision and expands around a hinge portion. The panel is provided with a fibrous multi-layered structure that is arranged so as to straddle the position that becomes the hinge portion, and the fibrous multi-layered structure has a surface layer in which the resin is difficult to penetrate at a high density and a resin which penetrates at a low density. It is characterized in that the instrument panel main body and the airbag door section are formed of the same hard resin material with the intermediate layer interposed therebetween.

Therefore, while the joining force between the instrument panel body and the airbag door portion is sufficiently maintained by the anchor effect between the fibrous multilayer structure and the resin, the bending of the airbag door hinge portion when the airbag bag is deployed is performed. On the other hand, since the resin impregnation rate of the surface layer of the fibrous multilayer structure is small, resin cracking and scattering at the hinge portion can be suppressed at the surface layer.

According to a fourth aspect of the present invention, an airbag door portion which is cleaved from a fragile portion provided at a position facing the passenger seat due to inflation pressure of the airbag bag at the time of a collision and deployed centering on the hinge portion is integrally formed. A method of manufacturing an instrument panel having, wherein a fibrous multilayer structure having a high-density resin-infiltrating surface layer and a low-density resin-infiltrating intermediate layer is located in a molding die facing the hinge portion. After the mold is clamped, the multi-layer structure is filled with the hard resin material together with the instrument panel body and the air bag door.

Therefore, it can be manufactured by a simple method using conventional equipment. According to a fifth aspect of the present invention, an instrument integrally having an airbag door portion that splits from a fragile portion provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of a collision and expands around a hinge portion. The panel, which is provided with a flexible tubular connector having an uneven shape at both ends of the outer periphery arranged across the position to be the hinge portion,
The instrument panel body and the airbag door are formed of the same hard resin material through the hollow portion of the tubular connecting body.

Therefore, while the joining force between the instrument panel body and the airbag door portion is sufficiently maintained by the anchoring effect between the resin and the outer peripheral both ends of the flexible tubular connecting body, when the airbag bag is deployed. With respect to the bending of the airbag door hinge portion, since the cylindrical connecting body has no resin on the surface layer of the hinge portion, resin cracking and scattering of the hinge portion can be suppressed.

According to a sixth aspect of the present invention, the airbag door portion which is cleaved from the fragile portion provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of a collision and deployed around the hinge portion is integrally formed. A method of manufacturing an instrument panel having, wherein a flexible tubular connector having concavo-convex shapes at both ends of an outer periphery is set across a position in a molding die facing the hinge portion, and after the die is clamped, an instrument is installed. The hard resin material is filled in the hollow portion of the connecting body together with the ment panel body and the airbag door portion.

Therefore, it can be manufactured by a simple method using conventional equipment.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of an instrument panel having an airbag door unit according to the present invention.
3 will be described with reference to FIG.

As shown in FIG. 2, an instrument panel 10 provided inside a vehicle compartment is provided with an airbag device 12 inside the passenger seat.

As shown in FIG. 1, the airbag device 12
Includes an airbag case 14 disposed on the back side of the instrument panel 10, and an inflator 16 is disposed at the bottom of the airbag case 14. An airbag body 18 is stored in a folded state on the opening side in the airbag case 14.

In addition, the instrument panel 10 includes an instrument panel body 20 (for example, made of a hard resin) which forms the basic shape of the instrument panel 10 (for example,
(Thickness: 3.5 mm), a barrier layer 22 (for example, a thickness of 1 mm) provided outside the instrument panel body 20, and a skin material 24 provided outside the barrier layer 22 ( For example, it has a laminated structure in which a vinyl chloride having a thickness of 0.5 mm to 0.8 mm and a foam layer having a thickness of 3 mm are provided on the back surface). The barrier layer 22
Is provided to prevent the skin material 24 set in the molding die from melting and hardening when the instrument panel 10 is injection molded.

As shown in FIG. 2, the instrument panel 10 comprises a body portion 28 and a rectangular air bag door portion 30 formed integrally with the body portion 28 at a portion facing the air bag device 12. An H-shaped fragile portion 32 is formed in the airbag door portion 30.

As shown in FIG. 1, the fragile portion 32 has a notch groove 33 formed in the skin material 24. Further, the fragile portion 32 is formed with a notch groove 34 that reaches the barrier layer 22 from the instrument panel body base material 20 side, and the airbag door portion 30 is formed by the inflation pressure of the airbag bag body 18 at the time of a vehicle collision. , H-shaped fragile portion 32, and the double door is opened to the front door portion 30A and the rear door portion 30B as shown by the chain double-dashed line in FIG.

At this time, in the hinge portion 36, which is the center of expansion of the front door portion 30A, a long metal fiber made of metal such as iron impregnated between the barrier layer 22 and the instrument panel body 20 is provided. The aggregate 38 is buried. Similarly, in the hinge portion 40, which is the center of expansion of the rear door portion 30B, a metal long fiber assembly 42 made of metal such as iron impregnated between the barrier layer 22 and the instrument panel body base material 20 is formed. Is buried.

Further, in the hinge portion 36 and the hinge portion 40, a hinge notch 37 and a hinge notch 41 are formed from the side of the instrument panel main body, respectively, and these hinge notch 37 and hinge notch 41 are formed. Extends partway through the instrument panel body 20.

As shown in FIG. 2, the metallic long fiber aggregate 38 is arranged with a predetermined front-rear width along the hinge portion 36 between the left and right ends 32A and 32B on the front side of the fragile portion 32. The metal long fiber assembly 42 has a hinge portion 40 that is between the left and right ends 32C and 32D on the rear side of the fragile portion 32.
Are arranged with a predetermined width in the front-rear direction.

Next, the operation of the first embodiment will be described.
When the airbag device 12 detects a sudden deceleration of the vehicle by a mechanical or electrical acceleration sensor (not shown), the inflator 16 operates and the airbag bag 18 in the airbag case 14 is moved to the instrument panel 10. The airbag is inflated toward the door portion 30. The airbag body 18 presses the airbag door portion 30 and the airbag door portion 30 is cleaved from the fragile portion 32. Further, the front door portion 30A and the rear door portion 30B of the airbag door portion 30 are shown by a chain double-dashed line in FIG. 1 centering on the hinge portion 36 and the hinge portion 40, starting from the hinge notch 37 and the hinge notch 41. As you can see, the double door is opened and deployed in the passenger compartment.

At this time, a part of the metallic long fiber aggregate 38 and the metallic long fiber aggregate 42 is also impregnated on the instrument panel body base material 20 side, so that the airbag door portion 3 is formed.
The substantial amount of resin in the hinge portion 36 and the hinge portion 40 of 0 is extremely small, and scattering of the resin portion due to bending of the hinge portion 36 and the hinge portion 40 is suppressed. Further, the main body portion 28 of the instrument panel 10, the front door portion 30A and the rear door portion 30B of the airbag door portion 30.
For bridging with the above, since the metal long-fiber aggregate 38 and the metal long-fiber aggregate 42 have sufficient bonding force, the airbag door portion 30 does not come off from the main body portion 28 of the instrument panel 10.

Therefore, a material having a high elastic modulus capable of sufficiently producing the rigidity of the instrument panel 10 is used for the airbag door portion 3.
0, and since the main body portion 28 of the instrument panel 10 and the airbag door portion 30 can be configured by the same member, the designability of the instrument panel 10 is improved and deformation due to heat or the like can be suppressed. it can.

Next, the manufacturing method of the first embodiment will be described. As shown in FIG. 3, a heating device such as a high-frequency induction heating device 51 is applied to a portion of the barrier layer 22 of the skin material 24 which will be the hinge portion 36 and the hinge portion 40, for example, at 200 ° C.
The metal continuous fiber aggregate 38 and the metal continuous fiber aggregate 42, which have been heated to a certain degree, are pressed by the pressing jig 44.
The resin of the barrier layer 22 is impregnated by pressing from the side.
At this time, the fixing jig 46 is arranged at a portion facing the pressing jig 44 with the skin material 24 and the barrier layer 22 sandwiched therebetween, and the pressing jig 44 is moved to the fixing jig 46 side to be heated. The metal long fiber aggregate 38 and the metal long fiber aggregate 42,
The resin of the barrier layer 22 is impregnated.

Next, the barrier layer 22 and the skin material 24 impregnated with the metal long fiber aggregate 38 and the metal long fiber aggregate 42 are set in a molding die, and an instrument panel body made of a hard resin material is set. By insert-molding the base material 20, as shown in FIG. 1, parts 38A, 42A of the metallic long fiber aggregate 38 and the metallic long fiber aggregate 42 are formed.
Is also impregnated on the instrument panel body base material 20 side.

In this case, as the material of the barrier layer 22, a material having a heat fusion property with the resin of the instrument panel body 20 may be selected. For example, when the resin of the instrument panel body 20 is a polypropylene resin, a polypropylene film material may be used as the barrier layer 22. The barrier layer 22 needs to have a sufficient thickness as an impregnation layer for the metallic long fiber aggregate 38 and the metallic long fiber aggregate 42.

Notch groove 34 and hinge notch 37
The notch 41 for hinge and the notch 41 for hinge are formed by, for example, hot blades.

Therefore, in the first embodiment, since the airbag door portion 30 can be integrally formed by the high-rigidity resin forming the instrument panel 10, the manufacturing process can be reduced and the cost can be reduced. The design of the instrument panel surface is improved by integrating the door. Further, it can be manufactured by a simple method using conventional equipment.

In the first embodiment, the metal long fiber aggregate 38 and the metal long fiber aggregate 42 are used.
Instead of the metallic long fiber aggregate, a metallic net-like structural body in which a metal such as iron is netted may be used.

Next, a second embodiment of the instrument panel having the airbag door portion of the present invention will be described with reference to FIGS. 4 and 5.

The same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 4, in the second embodiment, the instrument panel 10 is made of polypropylene,
It is made of a hard resin material such as ABS, PC, and modified PPO, and a fibrous multi-layer structure 50 and a fibrous multi-layer structure 52 are arranged in the hinge portion 36 and the hinge portion 40. Further, in the hinge portion 36 and the hinge portion 40, gaps 54 and 56 are formed between the main body portion 28 of the instrument panel 10 and the airbag door portion 30.

The fibrous multilayer structures 50 and 52 have a three-layer structure, and the upper and lower surface layers 50A and 52A have a very high density, which makes it difficult for the resin to penetrate. In addition, the intermediate layers 50B and 52B have low densities, and the resin easily penetrates. For example, the fibrous multilayer structures 50 and 52 are non-woven fabric structures such as polyester, nylon, polypropylene, and natural wood fibers, and the surface layers 50A and 52A have a density of the intermediate layer 50B and the intermediate layer 52B.
The density is more than 1.5 times.

As shown in FIG. 5, the fibrous multilayer structure 5
0 is arranged with a predetermined width in the front-rear direction along the hinge portion 36 between the left and right ends 32A and 32B on the front side of the fragile portion 32, and the front and rear ends thereof are respectively the main body portion 28 of the instrument panel 10. And the airbag door portion 30 are embedded respectively. Further, the fibrous multilayer structure 52 is
The fragile portion 32 is arranged with a predetermined width in the front-rear direction along the hinge portion 40 between the left and right ends 32C and 32D on the rear side.
No. 0 main body portion 28 and an airbag door portion 30 are embedded respectively.

Next, the operation of the second embodiment will be described.
When the airbag device 12 detects a sudden deceleration of the vehicle by a mechanical or electrical acceleration sensor (not shown), the inflator 16 operates and the airbag bag 18 in the airbag case 14 is moved to the instrument panel 10. The airbag is inflated toward the door portion 30. The airbag body 18 presses the airbag door portion 30 and the airbag door portion 30 is cleaved from the fragile portion 32. Further, the front door portion 30A and the rear door portion 30B of the airbag door portion 30 are double-folded around the hinge portion 36 and the hinge portion 40 as shown in FIG.

At this time, the surface layers 50A and 52A of the fibrous multilayer structure 50 and the fibrous multilayer structure 52 have a very high density, and it is difficult for the resin to permeate the air bag door portion 30. The substantial resin content in the hinge portions 36 and 40 is extremely small, and the resin content is prevented from scattering due to bending of the hinge portions 36 and 40. Further, as a bridge between the main body portion 28 of the instrument panel 10 and the door portion 30, since the fibrous multilayer structure 50 and the fibrous multilayer structure 52 have a sufficient bonding force, the airbag door portion 30 is installed in the instrument. It does not come off from the body 28 of the panel 10.

Therefore, a material having a high elastic modulus, which can sufficiently provide the rigidity of the instrument panel 10, is used for the airbag door portion 3.
0, and since the main body portion 28 of the instrument panel 10 and the airbag door portion 30 can be made of the same member, the designability of the instrument panel 10 is improved and deformation due to heat or the like can be suppressed. it can.

Next, the manufacturing method of the second embodiment will be described. In the second embodiment, the fibrous multilayer structure 50 and the fibrous multilayer structure 52 are set in a molding die, and the main body portion 28 and the airbag door portion 30 of the instrument panel 10 made of a hard resin material are inserted. Mold.

In this case, the hard resin material forming the main body portion 28 and the airbag door portion 30 of the instrument panel 10 is the fibrous multilayer structure 50 and the fibrous multilayer structure 5.
While penetrating 2, the main body portion 28 and the airbag door portion 30 are filled from one side to the other side, but the fibrous multilayer structure 50 and the fibrous multilayer structure 52 have surface layers 50A, 52A.
However, since the resin has a very high density, the resin mainly flows through the low-density intermediate layers 50B and 52B, and sufficient molding filling properties are secured in the intermediate layers 50B and 52B. .

Therefore, in the second embodiment, since the airbag door portion 30 can be integrally formed by the high-rigidity resin forming the instrument panel 10, the manufacturing process can be reduced and the cost can be reduced. The design of the instrument panel surface is improved by integrating the door. Further, it can be manufactured by a simple method using conventional equipment.

In the second embodiment, the fibrous multilayer structure 50 and the fibrous multilayer structure 52 are used, but instead of these, as shown in FIG. 7, a flexible tubular connection is provided. The body 58 may be used. A plurality of ring-shaped convex portions 60 are formed at predetermined intervals on both outer peripheral ends 58A and 58B of the connecting body 58. As shown in FIG. 8, a plurality of connecting bodies 58 are arranged at predetermined intervals along the hinge portions 36 and 40, and at the time of molding, the connecting body 58 is inserted through the hollow portion of the connecting body 58 set in the molding die. Then, the hard resin material is filled from one of the body portion 28 and the airbag door portion 30 to the other. Further, since the outer peripheral end portions 58A and 58B having the uneven shape are embedded in the main body portion 28 of the instrument panel 10 and the airbag door portion 30, the main body portion 28 of the instrument panel 10 is formed.
As a bridge between the airbag and the airbag door section 30, a connecting body 58
Has a sufficient coupling force, the air bag door portion 30 will not come off from the main body portion 28 of the instrument panel 10.

The cross-sectional shape of the connecting body 58 is not limited to a circular shape, and may be a flat circular shape. Also, other cross-sectional shapes such as a rectangle may be used. In addition, both outer peripheral ends 58A, 5 of the connecting body 58,
The method of forming the concave and convex shape on 8B may be another method of forming a concave portion or the like instead of the ring-shaped convex portion 60.

In the above, the present invention has been described in detail with respect to specific embodiments, but the present invention is not limited to such embodiments, and various other embodiments within the scope of the present invention. It is obvious to a person skilled in the art that For example, the airbag door portion 30 of each of the above embodiments
Has a double door structure, but the airbag door portion 3
0 is not limited to the double door structure, but may be a single structure.

[0048]

According to the invention described in claim 1, the skin material, the barrier layer and the instrument panel main body made of a hard resin are laminated in this order, and the position facing the passenger seat due to the inflation pressure of the airbag bag at the time of collision. An instrument panel integrally having an air bag door portion that is cleaved from a fragile portion provided at the hinge portion and expands around a hinge portion, wherein both are impregnated between the barrier layer at the hinge portion and the instrument panel body base material. A metal long-fiber aggregate or a metal net-like structure that is buried by being embedded, and a hinge notch that is formed from the instrument panel body base material side to the hinge portion and extends to the middle of the instrument panel body base material. Since it is configured, the resin component of the airbag door hinge portion is prevented from scattering when the airbag bag is deployed, and the instrument panel and the airbag door are Integrated has an excellent effect that it is possible.

According to a second aspect of the present invention, a skin material, a barrier layer and an instrument panel main body made of a hard resin are laminated in this order, and are provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of collision. A method of manufacturing an instrument panel integrally having an airbag door portion that is split from a fragile portion and expands around a hinge portion, wherein a portion of the barrier layer lined with a skin material that serves as a hinge portion is heated with metal. The long fiber aggregate or metal net-like structure is pressed to be impregnated in the resin of the barrier layer, and then set in the molding die to insert-mold the instrument panel body base material made of a hard resin material. By doing so, a part of the metal long fiber aggregate or the metal net-like structure was also impregnated on the instrument panel body base material side. It has an excellent effect of being able to elephants.

According to the third aspect of the present invention, the airbag door portion which is cleaved from the fragile portion provided at the position facing the passenger seat due to the inflation pressure of the airbag bag at the time of collision and deployed around the hinge portion is integrally formed. An instrument panel having, comprising a fibrous multi-layered structure arranged so as to straddle a position serving as a hinge part, the fibrous multi-layered structure has a surface layer in which resin is difficult to penetrate at high density and a resin having low density The air bag door hinge when the air bag body is deployed, because the instrument panel body and the air bag door are made of the same hard resin material through the middle layer, which is easy to penetrate. This has an excellent effect that the scattering of the resin component of the portion can be suppressed and the instrument panel and the airbag door can be integrated.

According to a fourth aspect of the present invention, the airbag door portion which is cleaved from the fragile portion provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of collision and deployed around the hinge portion is integrally formed. A method of manufacturing an instrument panel having a fibrous multi-layered structure comprising a surface layer having a high density, which hardly penetrates a resin, and an intermediate layer, which has a low density and which allows a resin to easily penetrate, at a position in a molding die facing the hinge portion. Since the hard resin material is filled into the multi-layer structure together with the instrument panel body and the airbag door after the mold is clamped and set over the mold, it is an excellent effect that it can be manufactured by a simple method using conventional equipment. Have.

According to a fifth aspect of the present invention, the airbag door portion which is cleaved from the fragile portion provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of collision and deployed around the hinge portion is integrally formed. An instrument panel having, comprising a flexible tubular connecting body having an uneven shape at both outer peripheral ends arranged across a position to be a hinge portion, through a hollow portion of the tubular connecting body Since the instrument panel body and the airbag door were made of the same hard resin material, the resin component at the hinge part of the airbag door is prevented from scattering when the airbag bag is deployed, and the instrument panel and the airbag door are It has an excellent effect that it can be integrated with.

According to a sixth aspect of the present invention, an airbag door portion which is cleaved from a fragile portion provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of collision and deployed around the hinge portion is integrally formed. A method for manufacturing an instrument panel having, wherein a flexible tubular connector having concavo-convex shapes at both outer peripheral ends is set across a position in a molding die facing a hinge portion, and after the die is clamped, the instrument panel Since the hard resin material is filled in the hollow portion of the connecting body together with the main body and the airbag door portion, it has an excellent effect that it can be manufactured by a simple method using conventional equipment.

[Brief description of drawings]

FIG. 1 is a schematic enlarged cross-sectional view taken along line 1-1 of FIG.

FIG. 2 is a perspective view showing an instrument panel integrally having an airbag door portion according to the first embodiment of the present invention, as viewed from diagonally rearward of the vehicle.

FIG. 3 is an explanatory view showing a part of a method for manufacturing an instrument panel integrally having an airbag door section according to the first embodiment of the present invention.

4 is a schematic enlarged cross-sectional view taken along line 4-4 of FIG.

FIG. 5 is a perspective view of an instrument panel integrally having an airbag door portion according to a second embodiment of the present invention, as viewed from obliquely rearward of the vehicle.

FIG. 6 is a sectional view corresponding to FIG. 4, showing a developed state of an airbag door portion of an instrument panel integrally having an airbag door portion according to a second embodiment of the present invention.

FIG. 7 is a perspective view showing a connector used in an instrument panel integrally having an airbag door section according to a modified example of the second embodiment of the present invention.

FIG. 8 is a perspective view of an instrument panel integrally having an airbag door portion according to a modified example of the second embodiment of the present invention, which is viewed obliquely from the rear of the vehicle.

FIG. 9 is a cross-sectional view showing an airbag device according to a conventional embodiment.

[Explanation of symbols]

 10 Instrument Panel 12 Airbag Device 20 Instrument Panel Main Body Substrate 22 Barrier Layer 24 Skin Material 28 Instrument Panel Main Body 30 Airbag Door Part 32 Weak Part 34 Notch Groove 36 Hinge Part 37 Hinge Notch 38 Metal Length Fiber assembly 40 Hinge part 41 Hinge notch 42 Metal long fiber assembly 50 Fibrous multilayer structure 50A Surface layer 50B Intermediate layer 52 Fibrous multilayer structure 52A Surface layer 52B Intermediate layer 58 Flexible tubular coupling body

Claims (6)

[Claims] 1. A skin material, a barrier layer, and an instrument panel main body made of a hard resin, which are laminated in this order, and are cleaved from a fragile portion provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of collision. An instrument panel that integrally has an airbag door portion that expands around a hinge portion, and is made of a metal that is embedded by being impregnated between the barrier layer and the instrument panel body base material in the hinge portion. A long fiber aggregate or a metal net-like structure, and a hinge notch formed in the hinge portion from the side of the instrument panel body base material and extending to a midpoint of the instrument panel body base material. An instrument panel that has an airbag door part that is integrated with. 2. A skin material, a barrier layer, and an instrument panel main body made of a hard resin, which are laminated in this order, and are cleaved from a fragile portion provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of a collision. A method of manufacturing an instrument panel integrally having an airbag door part that deploys around a hinge part, wherein a part that becomes a hinge part of a barrier layer lined with a skin material,
A heated metal filament assembly or a metal net-like structure is pressed to impregnate the resin of the barrier layer and then set in a molding die to form an instrument panel base material made of a hard resin material. By insert-molding the metallic long-fiber aggregate or the metallic net-like structural body so that the instrument panel body base material side is also impregnated with the airbag door portion integrally. Method of manufacturing a ment panel. 3. An instrument panel integrally having an airbag door portion which is split from a fragile portion provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of a collision and expands around a hinge portion. A fibrous multilayer structure disposed across the position to be the hinge portion, wherein the fibrous multilayer structure has a surface layer in which resin is difficult to penetrate at high density and an intermediate layer in which resin is easily penetrated at low density. An instrument panel integrally comprising an airbag door portion, characterized in that the instrument panel body and the airbag door portion are formed of the same hard resin material via the intermediate layer. 4. A method of manufacturing an instrument panel integrally having an airbag door portion which is cleaved from a fragile portion provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of a collision and deployed around a hinge portion. And a fibrous multilayer structure comprising a surface layer having a high density and hardly permeating the resin and a middle layer having a low density and easily permeating the resin is set across the position in the molding die facing the hinge part, After tightening, a hard resin material is filled into the multilayer structure together with the instrument panel body and the airbag door portion, and the instrument panel manufacturing method integrally having the airbag door portion. 5. An instrument panel integrally having an airbag door portion which is split from a fragile portion provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of a collision and expands around a hinge portion. A flexible tubular connecting body having an uneven shape is provided at both ends of the outer periphery arranged across the position serving as the hinge portion, and an instrument panel main body is provided through a hollow portion of the tubular connecting body. An instrument panel integrally having an airbag door portion, characterized in that the airbag door is formed of the same hard resin material. 6. A method of manufacturing an instrument panel integrally having an airbag door portion which is split from a fragile portion provided at a position facing the passenger seat due to the inflation pressure of the airbag bag at the time of a collision and expands around a hinge portion. A flexible tubular connector having concavo-convex shapes on both ends of the outer periphery is set across the position in the molding die facing the hinge portion, and after the die is clamped, the instrument panel body and the airbag door are A method for manufacturing an instrument panel integrally having an airbag door portion, characterized in that the hard resin material is filled in the hollow portion of the connecting body together with the portion.