JPH0952567A - Instrument panel provided with air bag door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a bag body from slipping between a foamed layer and a substrate body when the bag body is inflated. SOLUTION: A rib 42 of approximately U-shape to be projected to a surface skin 30 is formed on a door insert 32 of an air bag door 14. The inflation load of a bag body can be directly transmitted to a breakage part 40, and sure breakage can be realized from the breakage part 40 without any separation between layers. As a result, a part of the inflated bag body can be prevented from slipping between a foamed layer 20 and a surface skin 16, or between the foamed layer 20 and an instrument panel core 18, and the surface skin 16 or the foamed layer 20 is prevented from being scattered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instrument panel having an air bag door which is deployed when a predetermined high load is applied.

[0002]

2. Description of the Related Art In an airbag device, for example, an airbag device for a passenger seat, an airbag door is provided in a part of an instrument panel of a vehicle. Here, as conventional airbag doors, there are a type in which the airbag door is formed separately from the instrument panel and attached to the instrument panel afterwards, and a type in which the airbag door is provided integrally with the instrument panel. In the former type, since the airbag door is configured separately from the instrument panel, it is difficult to control the parting between the airbag door opening of the instrument panel and the airbag door, and eventually the quality of the appearance. There is also a cost disadvantage because the man-hours increase. For this reason, the latter type is being adopted recently.

The following are conventional examples belonging to the latter type. Japanese Patent Publication No. 6-
According to Japanese Patent No. 45184, as shown in FIGS. 30 and 31, the airbag door 150 provided on the instrument panel includes a skin portion 152 and a foam layer 154 provided on the back surface side of the skin portion 152. , Consists of. A groove-shaped thin portion 156 is formed in the skin portion 152, and further, a reduced thickness portion 158 is formed at the bottom of the thin portion 156, which serves as a breaking line that breaks when a predetermined high load is applied.

The thin portion 156 and the reduced thickness portion 15 described above.
The airbag door 150 including 8 is manufactured as follows. First, after molding the skin of the instrument panel (including the skin 152 of the airbag door 150), the skin is heated by deep drawing (for example, vacuum drawing) to form the skin. The groove-shaped thin portion 156 is formed by being deformed. Next, thin part 1
The wall thickness reduced portion 158 is formed by high-frequency embossing the bottom portion of 56. After that, the skin part of the instrument panel including the skin part 152 of the airbag door 150 is set in the foam mold, and the foam layer 154 is formed inside the skin part by foam molding. As a result, when a predetermined high load is applied, the wall thickness reduced portion 158 is broken and the airbag doors 150 are deployed in directions away from each other.

[0005] Actual open flat 6-35057 according to the second conventional example
According to the publication, as shown in FIGS. 32 and 33, the instrument panel 160 includes a core material 162 and a foam layer 16.
4 and the skin layer 166 have a three-layer structure, and an opening 168 is formed in a predetermined portion of the core material 162 on the passenger seat side. At a position facing the opening 168, an airbag device 172 for bulging the bag body 170 toward the passenger seat when a predetermined high load is applied is provided.

An air bag grid (reinforcing plate) 174 is fixed to the opening 168 of the core material 162 with a bolt 176, whereby the opening 168 is closed. Epidermal layer 1
A thin weld portion 178 is formed near the tip of the air bag grid 174 at 66, which serves as a break line when a predetermined high load is applied. This thin wall weld 178
Is manufactured as follows. That is, as shown in FIG. 34, first, when the skin layer 166 is formed, a part of the skin material sheet 180 is bent to form a bent portion 182 having a U-shaped cross section.
Is provided. Next, the facing portions of the bent portion 182 are welded to each other. Then, the thin welded portion 178 is formed by cutting the tip of the bent portion 182 to a predetermined length.
As a result, when a predetermined high load is applied, the thin welded portion 17
The airbag door 183 is deployed by breaking from 8.

[0007]

However, in any of the structures described above, the peeling load between the urethane 186 and the instrument panel core 188 is lower than the breaking load of the breaking portion 184, as shown in FIG. When the bag body 192 expands to deploy the airbag door 190, the urethane 186 may be separated from the instrument panel core 188. In this case, it is conceivable that the bag body 192 sneaks into the peeled portion and the skin 194 breaks at a portion different from the breaking portion 184, and the breaking load becomes unstable.

In view of the above facts, the present invention has an instrument panel equipped with an airbag door capable of preventing the bag body from slipping between the foam layer and the base material body when the bag body is inflated. The purpose is to obtain.

[0009]

An instrument panel equipped with an airbag door according to the present invention according to claim 1 is a base material provided with a bulging opening of a bag body which bulges when a predetermined high load is applied. A body, a base material for an airbag door arranged in a bulging opening of the base material body, a foam layer arranged on the base material body and a base material for the airbag door, and a surface of the foam layer An instrument panel having an airbag door configured to cover the outer cover, the instrument panel having a rupture portion that ruptures due to the inflation pressure of the bag body when a predetermined high load acts, and along the rupture portion. The first protruding portion is provided on the base material for the airbag door, and the first protruding portion is provided so as to be proximate and abut on the back surface of the outer skin.

An instrument panel provided with an airbag door according to a second aspect of the present invention is the instrument panel according to the first aspect of the present invention, wherein the end portion of the first protruding portion is in contact with or substantially in contact with the base body. The feature is that they are brought into contact with each other.

An instrument panel provided with an airbag door according to a third aspect of the present invention is the instrument panel according to the first aspect or the second aspect of the invention, wherein the instrument panel is projected along the breaking portion and is close to the back surface of the skin. Or the second which is arranged in contact with
It is characterized in that the protrusion is provided on the base body.

An instrument panel equipped with an airbag door according to a fourth aspect of the present invention is the instrument panel according to any one of the first to third aspects, wherein the first protrusion and the second protrusion are provided. The broken portion was sandwiched between
It is characterized by:

An instrument panel provided with an airbag door according to the present invention according to claim 5 is a base material main body having a bag body swelling opening that swells when a predetermined high load is applied.
An air bag door base material having a door hinge portion and arranged in the bulging opening of the base material main body, and a foam layer arranged on the base material main body and the air bag door base material,
An instrument panel having an airbag door configured to cover a surface of the foam layer and a rupture portion that ruptures due to an inflation pressure of a bag when a predetermined high load is applied, the instrument panel including an air bag door, The bag door base material is formed wider than the swelling opening and is configured to be deformable by the inflation pressure of the bag body, and further, when the airbag door base material is deployed around the door hinge portion, the airbag. It is characterized in that deformation guide means for deforming both sides of the door base material by the inflation pressure of the bag body to make it into a substantially U-shape is provided.

According to a sixth aspect of the present invention, in an instrument panel having an airbag door according to the present invention, in the fifth aspect of the present invention, a door hinge portion is provided at a portion of the airbag door base material opposite to the door hinge portion. A slit formed substantially in parallel with each other and having a linear portion and a hole portion formed at an end portion of the linear portion on the swelling opening side, and a head having a larger diameter than the hole portion of the slit and a shaft. The deformation guide means is constituted by a connecting means for connecting the airbag door base material and the base material body via a slit, the portion having a diameter slightly larger than that of the linear portion.

An instrument panel equipped with an airbag door according to a seventh aspect of the present invention comprises a base material main body having a bag body bulging opening which bulges when a predetermined high load is applied.
An air bag door base material arranged in the bulging opening of the base material body, a foam layer arranged on the base material body and the air bag door base material, and a skin covering the surface of the foam layer. An instrument panel including an airbag door configured to include, and fixing an airbag door base material to a peripheral portion of a swelling opening in a base body,
The base material for the airbag door is provided with an extension part which is extended inward of the swelling opening and is divided so that it can be deformed by the inflation pressure of the bag body. Furthermore, the inflation pressure of the bag body when a predetermined high load is applied. It is characterized in that the breaking portion that breaks at is provided on the skin along the dividing line of the extension portion.

According to an eighth aspect of the present invention, there is provided an instrument panel having an airbag door according to the present invention, wherein the airbag door base material having the extension portion is provided on the lower surface of the base body. It is fixed to.

An instrument panel provided with an airbag door according to a ninth aspect of the present invention includes a base material main body having a bag body swelling opening that swells when a predetermined high load acts.
An air bag door base material arranged in the swelling opening of the base material body, a foam layer arranged on the base material body and the air bag door base material, and while covering the surface of the foam layer. An instrument panel including an airbag door configured to include a rupture portion that ruptures due to an inflation pressure of a bag when a predetermined high load is applied, the instrument panel including an swelling opening in a base body. It is characterized in that a bag-shaped recess is provided in the peripheral portion.

An instrument panel equipped with an airbag door according to the present invention as defined in claim 10 is a base material main body having a bag body bulging opening which bulges when a predetermined high load is applied, and the base material. Base materials for airbag doors arranged in the bulging openings of the main body, foam layers arranged on the base body and base materials for airbag doors, and a predetermined height while covering the surface of the foam layers. An instrument panel including an airbag door configured to include a rupture portion that ruptures due to an inflation pressure of a bag when a load is applied, the instrument panel penetrating from a back surface side of the skin and having a substantially V-shaped cross section. It is characterized in that the fractured portion is formed by continuously providing the slits described above.

An instrument panel provided with an airbag door according to an eleventh aspect of the present invention is the instrument panel of the tenth aspect, wherein the slits are arranged in a zigzag pattern in which ends of the slits are arranged close to each other. By doing so, the fractured portion is configured.

An instrument panel equipped with an air bag door according to the present invention is a base material main body having a bag body bulging opening which bulges when a predetermined high load is applied, and the base material. An air bag door base material arranged in the bulging opening of the main body, a foam layer arranged on the base material main body and the air bag door base material, and a skin covering the surface of the foam layer. An instrument panel including an airbag door configured to include a rupture portion that is ruptured by the inflation pressure of the bag body when a predetermined high load is applied to the skin,
It is characterized in that the base body is provided with a projecting wall portion projecting from the peripheral edge portion of the swelling opening to the back surface side of the skin along the fractured portion.

An instrument panel equipped with an airbag door according to a thirteenth aspect of the present invention is the instrument panel according to the twelfth aspect of the present invention, in which a part of the projecting wall portion is subjected to post-processing such as thermal caulking. Thus, the base material for the airbag door is fixed to the main body of the base material.

According to the first aspect of the present invention, the first projecting portion provided on the airbag door base material is projected along the fractured portion and is arranged close to or in contact with the back surface of the skin. Therefore, the bulging load of the bag body when the airbag door is deployed is directly transmitted from the airbag door base material to the breakage portion through the first protruding portion. Therefore, the breaking load at the breaking portion can be reduced. Therefore, the airbag door is reliably broken and deployed from the planned break portion without peeling between the foam layer and the skin and peeling between the foam layer and the base body. Therefore, the bulging bag is between the foam layer and the skin,
It does not sneak between the foam layer and the substrate body. Also,
This also prevents scattering of the skin and the foam layer.

According to the invention of claim 2, claim 1
In the invention described in (3), since the end portion of the first protrusion provided on the base material for the airbag door is contacted or substantially contacted with the base material main body, a load is applied to the airbag door from the indoor side. In this case, this load is transmitted from the first protruding portion to the base material body and supported. As a result, the air bag door does not stick.

According to the present invention of claim 3, claim 1
Alternatively, in the invention according to claim 2, since the base body is provided with the second projecting portion that projects along the fractured portion and is arranged close to or in contact with the back surface of the outer skin, the bag body has the outer skin and the foam layer. When attempting to sneak in between the foam layer and the base material body, the second protrusion serves as a wall to prevent the bag body from sneaking in. Therefore, it becomes more reliable to break the airbag door from the breaking portion and deploy the airbag door.

According to the present invention of claim 4, claim 1
In the invention according to any one of claims 3 to 3, since the fractured portion is sandwiched between the first protrusion and the second protrusion, the fractured portion provided on the skin is isolated from the foam layer. That is, the first protrusion and the second protrusion function as a barrier layer against amine that causes deterioration of the skin. For this reason, opening of the broken portion due to breakage or deterioration is prevented. In addition, this improves the dimensional stability of the fractured portion and prevents dents due to shrinkage of the skin.

According to the fifth aspect of the present invention, when a predetermined high load is applied, the bag body expands and presses the base material for the airbag door. For this reason, the skin is broken from the breaking portion, and the airbag door base material is expanded around the door hinge portion. At this time, the base material for the airbag door is deformed by the expansion guide means by the expansion pressure of the bag body to become a substantially U-shape. For this reason, both sides of the airbag door base material serve as walls, and diving between the foam layer and the skin of the bag body and between the foam layer and the base body is prevented. This also gives
Since the epidermis is surely ruptured from the planned rupture part, the epidermis and the foam layer are not scattered.

Furthermore, according to the present invention, the deformation guide means deforms the airbag door base material into a substantially U-shape, so that the deployment angle of the airbag door is regulated in this deformed state. Therefore, the interference of the airbag door with the windshield glass is prevented, or the collision load at that time is reduced even if the airbag door interferes with the windshield glass.

According to the invention of claim 6, claim 5
In the invention described in (1), since the deformation guide means is constituted by the slit having a predetermined shape provided on the base material for the airbag door and the connecting means for connecting the base material for the airbag door and the base material main body, When both sides of the airbag door base material are deformed by the inflation pressure of the bag body and become substantially U-shaped, the fixing means deforms the slit. Therefore, due to the energy absorbing action due to this deformation, the collision load when the airbag door interferes with the windshield glass is further reduced.

According to the present invention of claim 7, when a predetermined high load is applied, the bag body expands and presses the base material for the airbag door. Therefore, the extension portion of the base material for the airbag door is deformed and the entire airbag door is inflated. Therefore, a force in the tensile direction always acts on the fractured portion provided on the skin along the dividing line of the extension portion, and the fractured portion is smoothly fractured without making the fractured portion so thin. As a result, no shearing force is generated between the foam layer and the skin, and between the foam layer and the base material body, and peeling does not occur. Therefore, the submergence between the foam layer and the skin of the bag and between the foam layer and the base material body is prevented. Further, as a result of this, the epidermis is surely ruptured from the planned rupture portion, so that the epidermis and the foam layer are not scattered.

According to the present invention of claim 8, claim 7
In the present invention described, since the base material for the airbag door having the extension portion is fixed to the lower surface of the base material main body, the extension portion of the base material for the airbag door sunk into the bag body when the bag body swells. Functions as a blocking wall. Therefore, the bag body is completely prevented from slipping in.

According to the ninth aspect of the present invention, since the bag-shaped concave portion is provided in the peripheral portion of the swelling opening in the base material main body, the foam material wraps around the concave portion when molding the foam layer.
Therefore, the peel strength between the foam layer and the base material body is improved. Therefore, the submergence of the bag body between the foam layer and the main body of the base material is prevented. Further, this prevents the foamed layer from scattering.

According to the tenth aspect of the present invention, since the fractured portion is formed by continuously providing the slit having a substantially V-shaped cross section, which penetrates from the back surface side of the skin, only the fine through hole is designed. Does not appear on the surface. Therefore, the design of the instrument panel is not impaired. Moreover, since the slit has a substantially V-shaped cross section on the back surface side of the skin, the breaking load at the breaking portion can be reduced. Therefore, the airbag door is reliably broken and deployed from the planned break portion without peeling between the foam layer and the skin and peeling between the foam layer and the base body. Therefore, the bulging bag body does not sneak between the foam layer and the outer skin, or between the foam layer and the base body. This also prevents scattering of the skin and the foam layer.

Further, according to the present invention, when the fractured portion is provided, it is only necessary to press the substantially V-shaped blade against the base, so that it is not necessary to strictly control the thickness of the fractured portion in the conventional case. , Manufacturing is facilitated.

According to the present invention of claim 11, in the invention of claim 10, the slits are arranged in a zigzag pattern in which the ends of the slits are arranged close to each other, so that when the airbag door is deployed. Even if the epidermis is stretched and the slit is deformed into an elliptical shape, the most sharp points of the ellipse and the portions arranged close to each other become the starting points of the fracture. For this reason,
The stress is likely to be concentrated, and the fracture progresses in a zigzag manner. As a result, the breaking load of the skin can be reduced. Therefore, the airbag door can be more reliably broken and deployed from the planned breaking portion without peeling between the foam layer and the skin and peeling between the foam layer and the base body. Also,
This also prevents scattering of the skin and the foam layer.

According to the twelfth aspect of the present invention, the projecting wall portion is provided on the substrate body so as to project from the peripheral edge of the swelling opening to the back surface side of the skin along the fractured portion. The part becomes a wall against the submergence of the bag. For this reason, the bag body is prevented from penetrating between the base body and the foam layer. This also prevents scattering of the skin and the foam layer.

According to the present invention of claim 13, in the invention of claim 12, the air bag door base material is preliminarily used as a base material by subjecting a part of the projecting wall portion to post-processing such as thermal caulking. Since the air bag door base material is fixed to the main body, the positioning of the air bag door base material is ensured, and the conventionally used foam material leakage prevention tape at the time of foam molding is not required, which facilitates manufacturing.

[0037]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] The first embodiment will be described below with reference to FIGS. It should be noted that this embodiment corresponds to an embodiment of the present invention described in claims 1 and 2.

FIG. 3 is a perspective view showing the appearance of the instrument panel 10. As shown in this figure, an airbag door 14 of an airbag device 12 is disposed on the passenger side of the instrument panel 10.

As shown in FIG. 2, the instrument panel 10 is made of resin (for example, PVC [PVC], TPO [olefin-based thermoplastic elastomer], urethane-based thermoplastic elastomer, or the like, which is disposed inside the vehicle. Soft resin) skin 16, an instrument panel core 18 made of PPG [composite reinforced polypropylene], ASG [composite reinforced acrylonitrile styrene], aluminum plywood, etc., which is arranged apart from the skin 16, and these skins 16 And a foam layer 20 such as a thermoplastic urethane filled between the instrument panel core 18 and the instrument panel core 18. Therefore, the skin 16 has a relatively low strength, while the instrument panel core 18 has a relatively high strength.

An opening 22 is formed at a predetermined position of the instrument panel core 18 of the instrument panel 10 described above. The airbag device 1 is provided at the position where the opening 22 is formed.
2 are provided. The airbag device 12 includes a substantially box-shaped airbag case 24, and the airbag case 2
The air bag door 14 closing the opening of No. 4, the substantially cylindrical inflator 26 fixed in the air bag case 24, and the bag body 28 arranged in a folded state around the inflator 26. ing.

The airbag door 14 has a skin 30 which is also a part of the skin 16 of the instrument panel 10 described above.
And a resin door insert 32 which is disposed apart from the skin 30 and is made of an iron plate or the same material as the instrument panel core 18 of the instrument panel 10, and these skins 30
Layer 34 which is filled between the door insert 32 and the door insert 32 and is also a part of the foam layer 20 of the instrument panel 10.
And consisting of The skin 16 of the instrument panel 10 and the skin 30 of the airbag door 14 are formed by powder slush molding, for example.

An airbag case 24 is disposed on the back side of the airbag door 14. Airbag case 2
4 has a substantially box-like shape, and its open end is bent in a direction away from each other to form a flange 24A. The airbag case 24 has these flange portions 2
4A is fixed to the instrument panel core 18 by a fixture 36 such as a bolt or a nut, and further, a stay (not shown) is fixed to a vehicle frame member such as a circular tubular instrument panel reinforcement, so that it is attached. Of these, the flange portion 24A on the vehicle front side is fastened together with the door insert 32 of the airbag door 14. As a result, this portion functions as the hinge portion 38 when the airbag door is deployed.

The inflator 26 has a substantially columnar shape, and a mechanical ignition type air bag sensor (not shown) for detecting the sudden deceleration of the vehicle is disposed on the side of the inflator 26. A not-shown squib is provided on the movement locus of the firing pin of the airbag sensor inside the inflator 26. An enhancer (fire transfer agent) is provided around the detonator, and a gas generating agent is accommodated in the outer periphery thereof. An electric ignition type airbag sensor may be used instead of the mechanical ignition type airbag sensor described above. In this case, sensors for detecting a sudden deceleration state of the vehicle are not provided in the inflator, but are provided on both sides of the front of the vehicle, near the lower portion of the console box, and the like. When the inflator 26 having the above-described structure operates when a predetermined high load is applied, the bag body 28 accommodated in the airbag case 24 in a folded state is inflated.

Now, referring to FIG. 1, the fractured portion 40
The peripheral configuration of will be described in detail. As shown in this figure, the boundary between the skin 30 of the airbag door 14 and the skin 16 of the instrument panel 10 is bent in a U-shape, and this U-shaped portion serves as a break 40. There is. The tip portion 40A of the fractured portion 40 is thinner than the other portions. Therefore, the breaking portion 40 is broken from the tip portion 40A when the inflation pressure from the bag body 28 is received during a predetermined high load action. In the present embodiment, the breakage portion 40 is formed on the entire circumference of the airbag door 14, but it may be formed only on the portion excluding the hinge portion 38.

A rib 42 provided on the door insert 32 of the airbag door 14 is provided in the vicinity of the breaking portion 40 described above.
Are arranged adjacent to each other. The rib 42 is substantially U-shaped, and protrudes from the outer peripheral portion of the door insert 32 toward the skin 30 side. The top wall portion 42A of the rib 42 is disposed close to the outer skin 30, so that the foam layer 34 between the top wall portion 42A and the outer skin 30 is thin. A felt 44 is interposed between the lower end surface of the vertical wall portion 42B of the rib 42 and the instrument panel core 18 to prevent urethane leakage during foam molding.

Next, the operation and effect of this embodiment will be described. When a predetermined high load is applied, that is, when the vehicle suddenly decelerates, an airbag sensor (not shown) detects this and ignites the primer. Therefore, the gas generating agent burns through the enhancer, and a large amount of gas is generated. Therefore, the bag 28
Is inflated, and the airbag door 14 is pressed from the back side thereof.

At this time, the bulging load (inflation pressure) from the bag body 28 is transmitted to the door insert 32 of the airbag door 14. The door insert 32 is provided with a substantially U-shaped rib 42. Since the rib 42 is provided, the foam layer 34 between the top wall portion 42A and the outer skin 30 is thin. The skin 30 is directly pressed by the top wall portion 42A of 42. Therefore, this load is directly transmitted to the front end portion 40A which is the thin portion of the breakage portion 40. Therefore, the breaking load of the breaking portion 40 can be reduced. Therefore, the airbag door 14 is reliably broken as planned along the set break portion 40 without peeling between the foam layer 20 and the outer skin 16 and peeling between the foam layer 20 and the instrument panel core 18.

That is, in the present embodiment, the door insert 32 of the airbag door 14 is provided with a rib 42 projecting toward the outer skin 30 and having a substantially U-shape. By providing the rib 42, a foam layer between the outer skin 30 and the outer skin 30 is formed. Since 34 is made thin, the expansion load of the bag body 28 can be directly transmitted to the break portion 40, and the break portion 40 can be reliably broken without peeling between layers. As a result, the swelling bag 28
It is possible to prevent a part of the water from submersing between the foam layer 20 and the skin 16, and between the foam layer 20 and the instrument panel core 18, and also to prevent the skin 16 and the foam layer 20 from scattering. it can.

In this embodiment, the lower end of the vertical wall portion 42B of the rib 42 is attached to the instrument panel core 1 via the felt 44.
When the load is applied to the outer skin 30 of the airbag door 14 from the indoor side, the load can be transmitted from the rib 42 to the instrument panel core 18 and supported. Therefore, the airbag door 14 can be prevented from sticking. [Second Embodiment] The second embodiment will be described below with reference to FIG. In addition, this embodiment also claims
And an embodiment of the present invention according to claim 2.
Further, the same components as those in the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

As shown in this figure, a bent portion 52 wound into a substantially rectangular shape is formed on the peripheral edge portion of the door insert 50 of the airbag door 14. This bent portion 52
The top wall portion 52A is closely attached to the back surface of the skin 30 of the airbag door 14. Therefore, the top wall portion 52A of the bent portion 52
The foam layer 34 does not exist between the outer skin 30 and the outer skin 30. The bottom wall portion 52B of the bent portion 52 is in contact with the upper end surface of the instrument panel core 18. The door insert 50 is
It is made of iron plate or resin.

Further, the broken portion 54 is not formed in a substantially U shape, that is, the skin 16 of the instrument panel 10.
And the end of the outer skin 30 of the airbag door 14 are bent and the two are placed in a close contact state, thereby breaking the broken portion 5
It is set to 4. The end of the outer skin 16 of the instrument panel 10 and the end of the outer skin 30 of the airbag door 14 are not bonded to each other, but only contact with each other by the foaming pressure of the foam layer 20.

Also with the above structure, since the inflation pressure of the bag body 28 is directly transmitted to the outer skin 30 of the airbag door 14 via the bent portion 52 of the door insert 50, the breaking load of the breaking portion 54 can be reduced. Thus, it is possible to surely break the breaking portion 54 without peeling between the layers. Therefore, a part of the swelling bag body 28 is covered with the foam layer 20 and the skin 16.
During this time, it is possible to prevent the foam 16 from slipping between the foam layer 20 and the instrument panel core 18, and to prevent the outer skin 16 and the foam layer 20 from scattering.

Further, since the bottom wall portion 52B of the bent portion 52 is in contact with the instrument panel core 18, when a load is applied to the skin 30 of the airbag door 14 from the indoor side, this load is applied to the bent portion 52. Can be transmitted to and supported by the instrument panel core 18 via. Therefore, similarly to the above-described embodiment, the airbag door 14 can be prevented from sticking. [Third Embodiment] The third embodiment will be described below with reference to FIG. It should be noted that this embodiment corresponds to claim 3.
And an embodiment of the present invention according to claim 4.
Further, the same components as those in the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 5A, in this embodiment, not only the rib 42 is provided on the door insert 32 of the airbag door 14, but also the opening 22 of the instrument panel core 18 of the instrument panel 10. A substantially U-shaped rib 56 is integrally formed also on the peripheral portion on the side. Rib 4
The top wall portions 42A and 56A of 2,56 are the airbag door 1
4 skin 30, skin 16 of instrument panel 10
Are abutted against each other. The breaking portion 40 that is bent into a substantially U shape is sandwiched between the vertical wall portion 42B of the rib 42 and the vertical wall portion 56B of the rib 56.

Also with the above structure, the inflation pressure of the bag body 28 is directly transmitted to the skin 30 of the airbag door 14 via the ribs 42 of the door insert 32, so that the breaking load of the breaking portion 40 can be reduced. It is possible to surely rupture the rupture portion 40 without causing separation between the layers (FIG. 5).
(B)). Therefore, a part of the swelling bag body 28 is located between the foam layer 20 and the skin 16, and between the foam layer 20 and the instrument panel core 1.
It is possible to prevent sneaking in between 8 and
It is possible to prevent the skin 16 and the foam layer 20 from scattering. In particular, in the present embodiment, since the instrument panel core 18 is also provided with the rib 56 and the fractured portion 40 is sandwiched between the both ribs 42, 56, as shown in FIG. Vertical wall portion 56B of rib 56 when 28 bulges
Functions as a wall that prevents the bag body 28 from slipping in. Therefore, the function of preventing the bag body 28 from slipping in is more effectively exhibited than in the first embodiment described above. Further, since the ribs 56 are provided, the ribs 42 on the airbag door 14 side do not rub against the foam layer 20 on the instrument panel 10 side when the airbag door 14 is deployed. The scattering prevention effect is also more reliable.

Also in this embodiment, since the lower end portion of the vertical wall portion 42B of the rib 42 is in contact with the lower end portion of the rib 56 of the instrument panel core 18, the skin 30 of the airbag door 14 is exposed from the indoor side. It is possible to eliminate stickiness of the airbag door 14 when a load is applied.

Further, according to the present embodiment, the breaking portion 40
Since the ribs 42 and 56 are sandwiched by the ribs 42 and 56, the break 40 can be separated from the foam layers 20 and 34. That is,
The ribs 42, 56 function as barrier layers against amines that cause the skins 16, 30 to deteriorate. Therefore, it is possible to prevent the breaking portion 40 (particularly, the thinned tip portion 40A) from being broken or opened due to deterioration. Further, this can improve the dimensional stability of the fractured portion 40, and can prevent the folds due to the shrinkage of the skins 16 and 30.

Further, according to the present embodiment, the breaking portion 40
Since the ribs 42 and 56 are sandwiched between the foam layer 2
0 and 34 do not exist around the break 40 and are rigidly supported. For this reason, there is also an effect that the appearance quality around the airbag door 14 in the instrument panel 10 can be improved without waviness of the breakage portion 40. [Fourth Embodiment] The fourth embodiment will be described below with reference to FIGS. This embodiment corresponds to an embodiment of the present invention described in claims 5 and 6. Further, the same components as those in the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 6, in this embodiment, the door insert 60 of the airbag door 14 is formed in a substantially trapezoidal shape in a plan view. In the figure, a strip-shaped door hinge portion 62 is integrally formed on the upper edge portion of the door insert 60. Further, a pair of slits 64 parallel to the door hinge portion 62 are formed on both sides of the lower edge portion of the door insert 60. The slit 64 is a straight line portion 64A.
And a circular hole-shaped hole portion 64B continuously provided at the end of the straight portion 64A on the side of the airbag case 24. It should be noted that ribs 66 are integrally formed along the side edges on both sides of the door insert 60 to reinforce this portion.

The door insert 60 described above is attached to the instrument panel core 18 of the instrument panel 10 together with the airbag case 24 by the bolts 68 and the nuts 70 through the slits 64. More specifically,
As shown in FIGS. 7A and 7B, the bolt 68 is inserted through the hole 64B of the slit 64, and the instrument panel core 1
8 and the flange portion 24A of the airbag case 24, the nut 70 is tightened. The head 68
It is preferable to use a bolt 68 having a larger diameter A than the hole portion 64B of the slit 64, a shaft portion 68B slightly larger than the width of the straight portion 64A of the slit 64, and a smooth peripheral surface. Door Door insert 60 is bolt 68 and nut 7
In the state where the bolt 68 is attached to the instrument panel core 18 by 0, the tightening torque of the bolt 68 does not act on the door insert 60 so much, and only connects the door insert 60 to the instrument panel core 18. According to the above configuration,
When the vehicle suddenly decelerates from the state shown in FIG.
8 expands and the door insert 60 is pressed toward the skin 30 side. Therefore, the door insert 60 is guided by the bolt 68 and the slit 64 changes its position,
As shown in FIG. 8, it is deformed into a substantially U shape when viewed from the passenger side. This deformation ends when the bolt 68 comes into contact with the end of the slit 64 opposite to the hole 64B,
The ribs 66 are reinforced so that the deformation is surely completed when the bolt 68 comes into contact with the end portion on the side opposite to the hole portion 64B. Then, in the process of deforming the door insert 60 in this manner, the skin 30 is broken from the breaking portion 40 and the airbag door 14 is deployed, and finally the bag body is opened from the opening formed by the deformed door insert 60. 28 is bulged.

Here, in this embodiment, both sides of the deformed door insert 60 serve as walls with respect to the bulging bag body 28. Therefore, a part of the swelling bag body 28 is not covered
It is possible to prevent the skin 16 and the foam layer 20 from scattering, as well as to prevent the skin layer 16 and the foam layer 20 from being scattered between the foam layer 20 and the instrument panel core 18.

Further, according to the present embodiment, when the deformation of the door insert 60 is completed, the door insert 60 is
Has a triangular shape in a side view, and the airbag door 14
This limits the deployment angle of. Therefore, the interference of the airbag door 14 with the windshield glass can be avoided, or the collision load at that time can be reduced even if the airbag door 14 interferes with the windshield glass.

Further, according to the present embodiment, the slit 6
Since the diameter of the shaft portion 68B of the bolt 68 is slightly larger than the width of the straight portion 64A of No. 4, when the door insert 60 is deformed, the straight portion of the slit 64 is changed to the shaft of the bolt 68. It will be deformed by the portion 68B. For this reason, the energy absorption effect of this deformation can further reduce the collision load when the airbag door 14 interferes with the windshield glass.

The door insert 72 shown in FIG. 9 may be used instead of the door insert 60 used in this embodiment. The door insert 72 has a substantially trapezoidal shape in a plan view, and has two beads 74 and 76 on each side. One bead 74 is formed along the inclined edges on both sides of the door insert 72, and the other bead 76 is formed substantially at the center of the door insert 72 orthogonal to the lower edge. For this reason, when the door insert 72 receives the expansion pressure of the bag body 28, the beads 74 and 76 of which the rigidity is reduced become broken lines and the door insert 72 is deformed. Therefore, the deformation mode of the door insert 72 becomes uniform, and the airbag door 1 by the door insert 72 becomes uniform.
The deviation of the deployment angle of 4 is reduced. [Fifth Embodiment] The fifth embodiment will be described below with reference to FIGS. Note that this embodiment corresponds to an embodiment of the present invention described in claims 7 and 8. Further, the same components as those in the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 10 and 11, an opening 22 for bulging the bag 28 is formed at a predetermined position on the passenger side of the instrument panel core 18, and a plurality of openings 22 are formed around the opening 22. The bolt insertion hole 80 and the rivet hole 82 are formed. A rectangular frame-shaped reinforcing member 84 is provided on the upper surface side of the opening 22 of the instrument panel core 18. on the other hand,
On the lower surface side of the opening 22 of the instrument panel core 18, a rectangular flat plate-shaped door insert 86 is arranged. Then, with the reinforcing member 84 and the door insert 86 arranged on the front and back of the instrument panel core 18, the airbag case 2
4 together with bolts 88 and nuts.

Here, the door insert 86 is divided into four parts in the central portion excluding the outer peripheral frame portion, and as a result, the door insert 86 is integrally provided with four extended portions 86A extending from the outer peripheral frame portion toward the opening 22 side. Is formed in. The extension 86A of the door insert 86 is set so that the door hinge side is wider than the free end side.
Further, the outer skin 30 of the airbag door 14 is formed with a breakage portion 90 along the dividing line of the extension portion 86A of the door insert 86 (see FIG. 12).

According to the above structure, when the vehicle is suddenly decelerated from the state shown in FIG. 12, the bag body 28 expands and the door insert 86 is pressed toward the outer skin 30 side. Therefore, in the door insert 86, the respective extension portions 86A swell as a whole. Therefore, a force in the tensile direction is always applied to the fractured portion 90 of the skin 30, and the fractured portion 90 smoothly breaks and develops as shown in FIG. 13 without thinning the fractured portion 90 so much. Therefore, between the foam layer 20 and the skin 16, the foam layer 20 and the instrument panel core 1 are provided.
No shearing force is generated between No.8 and No peeling. As a result, it is possible to prevent a part of the swelling bag body 28 from diving between the foam layer 20 and the skin 16, and between the foam layer 20 and the instrument panel core 18, and at the same time, the skin 1
6. It is possible to prevent the foam layer 20 from scattering.
In particular, in the present embodiment, since the door insert 86 is fixed to the lower surface of the instrument panel core 18, the extension portion 86A functions as a wall that prevents the bag body 28 from slipping in when the bag body 28 swells. Therefore, the bag body 2 is more effective.
8 can be prevented from penetrating into each layer.

The method of setting the breakage portion 90 of the outer skin 30, that is, the method of dividing the door insert 86 is not limited to the above, and various settings are possible. For example, FIG. 14 (A)
14A and 14B, the fractured portions 92 may be semicircular on both sides, or the fractured portions 94 may be rectangular on both sides as shown in FIG. 14B. [Sixth Embodiment] Hereinafter, referring to FIG. 15 and FIG.
A sixth embodiment will be described. Note that this embodiment corresponds to an embodiment of the present invention described in claim 9.
Further, the same components as those in the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 15, in this embodiment, a substantially U-shaped and bag-shaped recess 100 is formed in a part of the peripheral edge of the opening 22 in the instrument panel core 18.
Therefore, the foam material of the foam layer 20 also wraps around in the recess 100. The door insert 102 is made of an iron plate, and is fixed to the part of the instrument panel core 18 where the recess 100 is not formed by the rivet 104.

According to the above construction, when the foam layers 20 and 34 are molded, the foam material of the foam layer 20 wraps around the inside of the recess 100, so that the peel strength between the foam layer 20 and the instrument panel core 18 is improved. Therefore, the foam layer 20 and the instrument panel core 1
8 can be prevented from peeling off, and the bag 28 is prevented from slipping between the foam layer 20 and the instrument panel core 18. Moreover, this can prevent the foam layer 20 from scattering.

Further, in the embodiment shown in FIG. 16, the peripheral edge portion of the opening 22 of the instrument panel core 18 and the door insert 1 are arranged.
A staircase-shaped reinforcing iron plate 106 is arranged between the two. A bag-shaped recess 108 is formed between the reinforcing iron plate 106 and the instrument panel core 18. Therefore, also in this embodiment, the foam layer 2 is formed in the recess 108.
Since the foam material of 0 wraps around, the peeling strength between the foam layer 20 and the instrument panel core 18 can be improved, and the bag 28 can be prevented from slipping in. [Seventh Embodiment] The seventh embodiment will be described below with reference to FIGS. Note that this embodiment corresponds to an embodiment of the present invention according to claim 10. Further, the same components as those in the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 17 and 18, in this embodiment, the fracture portion 110 formed on the outer skin 30 of the airbag door 14 has a slit 112 having a substantially V-shaped cross section.
Are continuously arranged. The top of the slit 112 penetrates the skin 30 and is a fine hole when viewed from the passenger side. This broken portion 110 is
As shown in FIG. 19, the outer skin 30 is set on the base 114, and the outer skin 30 is pressed by the blade mold 116 from the back surface side.

According to the above structure, when the airbag door 14 is viewed from the occupant side, the slits 112 only appear as fine holes, so that the design of the instrument panel 10 including the airbag door 14 is impaired. Absent. Moreover, since the slit 112 has a substantially V-shaped cross section on the back surface side of the skin 30, the breaking load of the breaking portion 110 can be reduced. Therefore, the airbag door 14 is reliably broken and deployed from the planned break portion 110 without peeling between the foam layer 20 and the outer skin 16 and peeling between the foam layer 20 and the instrument panel core 18. Also, as a result, the epidermis 16
It is possible to prevent the foam layer 20 from scattering.

Further, according to the present embodiment, the fractured portion 11
When forming 0, it suffices to press the substantially V-shaped blade mold 116 against the base 114, so that it is not necessary to strictly control the thickness of the fractured portion, which is conventionally required. Can be planned. [Eighth Embodiment] The eighth embodiment will be described below with reference to FIGS. This embodiment corresponds to an embodiment of the present invention as set forth in claim 11. Further, the same components as those in the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 20 and 21, in this embodiment, the break portion 120 formed in the outer skin 30 of the airbag door 14 has a slit 112 having a substantially V-shaped cross section.
Are arranged continuously and in a zigzag pattern. Therefore, the configuration is similar to that of the seventh embodiment.

The operation of this embodiment is as follows.
For example, when the slits 122 are linearly arranged as shown in FIG.
When the grooves 124 are alternately arranged on both sides with respect to the fracture center line P, stress is generated because the slits 122 and the V grooves 124 are deformed into an elliptical shape as shown in FIGS. 22 (B) and 23 (B). It is difficult to concentrate, and as a result, the breaking load tends to vary. However, according to the present embodiment, FIG.
As shown in (A), since the slits 112 are arranged in a zigzag pattern, the ends of the adjacent slits 112 are located at positions closest to each other. Therefore, FIG.
As shown in (B), even if the slit 112 is deformed into an elliptical shape, the most pointed parts of the ellipse and the parts arranged close to each other become the starting points of the fracture. Therefore, stress is likely to be concentrated and the fracture progresses in a zigzag manner. As a result, the broken portion 12
The breaking load of 0 can be reduced. Therefore, the foam layer 2
0 from the outer skin 16, the foam layer 20 and the instrument panel core 18
The air bag door 14 will be more reliably broken and deployed from the predetermined breaking portion 120 without being peeled off. Therefore, according to the present embodiment as well, the bag body 2
8 can be prevented from slipping into each layer, and the skin 16 and the foam layer 20 can be prevented from scattering. [Ninth Embodiment] The ninth embodiment will be described below with reference to FIGS. Note that this embodiment corresponds to an embodiment of the present invention described in claims 12 and 13. Further, the same components as those in the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 25 and 26, in this embodiment, a U-shaped projecting wall portion 130, which is U-shaped in a plan view, is formed integrally with the peripheral edge portion of the opening 22 of the instrument panel core 18 along the fractured portion 90. ing. Inside the protruding wall portion 130, the iron plate door insert 102 of the airbag door 14 is arranged. The peripheral edge portion of the door insert 102 is folded back, and the peripheral edge portion is pressed and fixed around the opening 22 by the thermal caulking portion 134 provided in a part of the projecting wall portion 130.

According to the above structure, the projecting wall portion 130 projecting toward the break portion 90 side is provided at the peripheral edge portion of the opening 22 of the instrument panel core 18.
Since the protruding wall portion 130 is provided, the protruding wall portion 130 serves as a wall with respect to the bulging bag body 28. For this reason, it is possible to prevent the bag body 28 from slipping between the instrument panel core 18 and the foam layer 20, and also to prevent the outer skin 16 and the foam layer 20 from scattering.

Further, according to this embodiment, the protruding wall portion 13
Since the peripheral edge portion of the door insert 102 is fixed around the opening 22 by the heat crimping portion 134 provided in a part of 0, the door insert 102 can be reliably positioned. Further, as a result, the tape 136 (FIG. 27) for preventing the leakage of the foam material at the time of foam molding which has been conventionally required.
(See) and a film are not necessary, and the manufacturing can be facilitated.

In the above embodiment, the heat caulking 134 is provided on a part of the protruding wall portion 130, but this structure may be omitted if it is only necessary to prevent the bag body 28 from slipping in.
For example, in the embodiment shown in FIG. 28, the projecting wall portion 130 projects along the break portion 90 at the peripheral edge portion of the opening 22 of the instrument panel core 18. This also causes the protruding wall portion 130 to
Since it forms a wall with respect to the bag body 28 in which the bag swells, it is possible to prevent the bag body 28 from slipping between the instrument panel core 18 and the foam layer 20. Further, for example, in the embodiment shown in FIG. 29, the projecting wall portion 130 is not integrally formed on the instrument panel core 18, but a reinforcing iron plate 138 having an L-shaped cross section is arranged at the peripheral portion of the opening 22. The bag body 2 in which the bent projecting wall portion 140 of the reinforcing iron plate 138 swells
Since it becomes a wall against 8, the instrument panel core 18 and the foam layer 2
It is possible to prevent the bag body 28 from sneaking in between 0 and 0.

In the present embodiment, the type in which the airbag door 14 is provided on the top of the instrument panel 10 has been described as an example, but the present invention is not limited to this, and an air bag is provided above the glove box in the instrument panel 10. The present invention may be applied to a type in which a bag door is arranged.

Further, in this embodiment, the skin 16 of the instrument panel 10 and the skin 3 of the airbag door 14 are used.
Although 0 was molded by powder slush molding, the present invention is not limited to this, and may be molded by sol type slush molding that does not use powder, or by vacuum molding or the like.

[0083]

As described above, the instrument panel provided with the airbag door according to the present invention as defined in claim 1 is provided with a break portion in the outer skin which is broken by the inflation pressure of the bag body when a predetermined high load is applied. At the same time, since the first protruding portion that projects along the fractured portion and is disposed close to or in contact with the fractured portion is provided on the airbag door base material, the fracture load at the fractured portion can be reduced, and the bag body can be reduced. It has an excellent effect that it is possible to prevent the bag body from submerging between the foam layer and the base material main body when the bag expands.

According to a second aspect of the present invention, there is provided an instrument panel having an airbag door according to the first aspect of the present invention, wherein the end portion of the first protrusion is in contact with or substantially in contact with the base body. Since it is brought into contact with the air bag, it has an excellent effect that the stickiness of the airbag door can be eliminated.

An instrument panel equipped with an airbag door according to the present invention as defined in claim 3 is the instrument panel according to claim 1 or 2, wherein the instrument panel is projected along a fractured portion and is close to or touches the fractured portion. Since the second projecting portion disposed in contact with the base body is provided, the second projecting portion serves as a wall, which has an excellent effect that the submergence of the bag can be prevented more effectively.

An instrument panel provided with an airbag door according to a fourth aspect of the present invention is the instrument panel according to any one of the first to fourth aspects, wherein the first protrusion and the second protrusion are provided. Since the broken part was sandwiched between
It has an excellent effect that it is possible to prevent tearing of the fractured part and opening of the mouth due to deterioration, it is possible to improve the dimensional stability of the fractured part, and further it is possible to prevent dents due to shrinkage of the epidermis. .

In the instrument panel equipped with the airbag door according to the present invention as defined in claim 5, the airbag door base material is formed wider than the swelling opening and is deformable by the inflation pressure of the bag body. Further, when the air bag door base material is deployed around the door hinge portion, both sides of the air bag door base material are deformed by the inflation pressure of the bag body to form a substantially U-shaped deformation guide means. Since the both sides of the base material for the airbag door serve as walls, the bag body can be prevented from slipping between the foam layer and the base material body when the bag body is inflated. Have the effect.

According to a sixth aspect of the present invention, there is provided an instrument panel comprising an airbag door according to the present invention, wherein the airbag door base material has a door hinge portion on a side opposite to the door hinge portion. A slit formed substantially in parallel with each other and having a linear portion and a hole portion formed at an end portion of the linear portion on the swelling opening side, and a head having a larger diameter than the hole portion of the slit and a shaft. Since the deformation guide means is constituted by the connecting means for connecting the airbag door base material and the base material body through the slit, the portion having a smaller diameter than the linear portion, and thus the energy absorbing action due to the deformation of the slit. If the airbag door interferes with the windshield glass, the impact load can be further reduced.

According to a seventh aspect of the present invention, there is provided an instrument panel equipped with an airbag door, wherein an airbag door base material is fixed to a peripheral edge portion of a swelling opening in a base material body, and the airbag door base material is fixed. A rupture that extends into the swelling opening and is divided into two parts that are deformable by the inflation pressure of the bag body, and that is broken by the inflation pressure of the bag body when a predetermined high load is applied. Since the part is provided on the skin along the dividing line of the extension part, no shearing force is generated between the foam layer and the base material body, and when the bag body is expanded, the bag body is formed between the foam layer and the base material body. It has an excellent effect that it can be prevented from diving into the like.

An instrument panel provided with an airbag door according to the present invention according to claim 8 is the instrument panel according to the invention according to claim 7, wherein the base material for the airbag door having an extension is provided on the lower surface of the base material body. Since it is fixed, the extension portion serves as a wall, which has an excellent effect that the submergence of the bag body can be completely prevented.

In the instrument panel provided with the airbag door according to the present invention as defined in claim 9, since the bag-shaped concave portion is provided in the peripheral portion of the swelling opening in the base material main body, the foam layer and the base material main body. It has an excellent effect that the peel strength between the bag body and the bag body can be increased, and the bag body can be prevented from diving between the foam layer and the base material body when the bag body is inflated.

In the instrument panel provided with the airbag door according to the present invention as defined in claim 10, the break portion is formed by continuously providing slits penetrating from the back side of the outer skin and having a substantially V-shaped cross section. Therefore, there is an excellent effect that the breaking load at the breaking portion can be reduced and the bag body can be prevented from diving between the foam layer and the base material body when the bag body is inflated.

An instrument panel provided with an airbag door according to the present invention of claim 11 is the same as the instrument panel of claim 10, wherein the slits are arranged in a zigzag pattern in which the ends of the slits are arranged close to each other. Since the rupture portion is configured in this manner, it has an excellent effect that it is possible to more reliably prevent the bag body from submersing between the foam layer and the base material body when the bag body is inflated.

An instrument panel equipped with an airbag door according to a twelfth aspect of the present invention has, as a base material, a projecting wall portion projecting from a peripheral portion of the swelling opening to a back surface side of the outer skin along a breaking portion. Since it is provided in the main body, it has an excellent effect that it is possible to prevent the bag body from diving between the foam layer and the base material body when the bag body expands and the bag body expands.

According to a thirteenth aspect of the present invention, in the instrument panel provided with the airbag door according to the present invention, in the twelfth aspect of the present invention, a part of the protruding wall portion is further subjected to post-processing such as thermal caulking. Since the base material for the airbag door is fixed to the base material main body by the above, there is an excellent effect that the positioning of the base material for the airbag door can be ensured and the manufacturing can be facilitated.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line 1-1 of FIG. 3 showing an instrument panel according to a first embodiment.

FIG. 2 is a sectional view taken along the line 2-2 of FIG. 3, showing the airbag device as a center.

FIG. 3 is a perspective view showing the external appearance of the instrument panel shown in FIGS. 1 and 2.

FIG. 4 is a main-portion cross-sectional view showing an instrument panel according to a second embodiment.

FIG. 5 is a cross-sectional view of an essential part showing an instrument panel according to a third embodiment.

FIG. 6 is a plan view showing a door insert according to a fourth embodiment.

7 is a cross-sectional view showing an instrument panel including the door insert shown in FIG.

8 is a perspective view showing a deformed state of the door insert shown in FIG. 7. FIG.

FIG. 9 is a perspective view showing a modification of the door insert.

FIG. 10 is an exploded perspective view showing an instrument panel according to a fifth embodiment.

FIG. 11 is a transverse cross-sectional view showing the initial state of expansion of the bag body in the instrument panel shown in FIG.

12 is a perspective view showing a broken portion of the instrument panel shown in FIG. 11. FIG.

13 is a perspective view showing a state where the door insert shown in FIG. 11 is expanded.

FIG. 14 is a perspective view corresponding to FIG. 12, showing a modification of the dividing method.

FIG. 15 is a main-portion cross-sectional view showing an instrument panel according to a sixth embodiment.

16 is a cross-sectional view of essential parts showing a modified example of the instrument panel shown in FIG.

FIG. 17 is a perspective view of a main part of a skin of an instrument panel according to a seventh embodiment as viewed from the back side.

FIG. 18 is a sectional view of a key portion showing the sectional structure of the fracture portion shown in FIG. 17;

19 is a cross-sectional view showing a mold structure in the case of manufacturing the fractured part shown in FIG.

FIG. 20 is a perspective view showing an instrument panel according to an eighth embodiment.

21 is a perspective view of a main part showing the structure of the fractured part shown in FIG. 20 as viewed from the back surface side of the skin.

22 is an explanatory diagram for explaining the effect of using the fractured part shown in FIG. 21 in comparison with other configurations. FIG.

FIG. 23 is an explanatory diagram for explaining an effect when the breakage portion shown in FIG. 21 is used in comparison with other configurations.

FIG. 24 is an explanatory diagram for explaining an effect when the breakage portion shown in FIG. 21 is used in comparison with another configuration.

FIG. 25 is a perspective view showing a main part of an instrument panel core according to a ninth embodiment.

FIG. 26 is a cross-sectional view of essential parts of an instrument panel using the instrument panel core shown in FIG. 25.

FIG. 27 is an explanatory diagram for explaining an effect when the instrument panel shown in FIG. 26 is used, in comparison with another configuration.

28 is a cross-sectional view of essential parts of an instrument panel showing an embodiment in which a heat-crimped portion is omitted in the configuration shown in FIG. 25.

29 is a main-portion cross-sectional view of an instrument panel showing an embodiment in which a protruding wall portion is configured by a reinforcing iron plate separate from the instrument panel core in the configuration shown in FIG. 28.

FIG. 30 is a perspective view of an airbag door according to a first conventional example.

FIG. 31 is a sectional view taken along line 31-31 of FIG. 30;

FIG. 32 is a vertical cross-sectional view of an instrument panel having an airbag door according to a second conventional example.

FIG. 33 is an enlarged view of a main part of the conventional example shown in FIG. 32.

34 is an explanatory diagram for explaining the manufacturing procedure of the thin welded portion shown in FIG. 33. FIG.

FIG. 35 is an explanatory diagram for explaining the problem of the conventional example.

[Explanation of symbols]

 10 Instrument Panel 14 Airbag Door 16 Skin 18 Instrument Panel Core (Base Material Main Body) 20 Foam Layer 22 Opening (Opening for Swelling) 28 Bag Body 30 Skin 32 Door Insert (Base Material for Airbag Door) 34 Foam Layer 40 Breaking Part 42 Rib (First Protruding Part) 50 Door Insert (Airbag Door Base Material) 54 Breaking Part 56 Rib (Second Projecting Part) 60 Door Insert (Airbag Door Base Material) 62 Door Hinge Part 64 Slit (Deformation Guide) Means) 64A Straight part 64B Hole 68 Bolt (deformation guide means, connecting means) 68A Head 68B Shaft 72 Door insert (base material for airbag door) 86 Door insert (base material for airbag door) 86A Extension 90 Broken portion 92 Broken portion 94 Broken portion 100 Recessed portion 108 Recessed portion 110 Broken portion 112 Slip DOO 120 breaks 130 projecting wall 134 thermally caulked portion 140 projecting wall

Claims (13)

[Claims] 1. A base material main body having a swelling opening of a bag body that swells when a predetermined high load is applied, and a base material for an airbag door arranged in the swelling opening of the base material main body. An instrument panel provided with an airbag door configured to include a foam layer disposed on the base body and the base material for an airbag door, and a skin covering the surface of the foam layer, The airbag is provided with a rupture portion that breaks due to the inflation pressure of the bag when a predetermined high load is applied, and a first protrusion that is projected along the rupture portion and is arranged close to or in contact with the back surface of the skin. An instrument panel equipped with an airbag door, which is provided on a base material for a vehicle. 2. The instrument panel with an airbag door according to claim 1, wherein an end portion of the first protruding portion abuts or substantially abuts on a base body. . 3. The base material main body is provided with a second projecting portion which is projected along the fractured portion and is arranged in proximity to or in contact with the back surface of the skin. An instrument panel equipped with the airbag door described in 1. 4. The airbag door according to claim 1, wherein the broken portion is sandwiched between the first protruding portion and the second protruding portion. Instrument panel equipped. 5. A base material main body having a swelling opening of a bag body that swells when a predetermined high load is applied, and an airbag door that is arranged in the swelling opening of the base material body and has a door hinge portion. Base material, a foam layer disposed on the base body and the base material for an airbag door, and a rupture portion that covers the surface of the foam layer and breaks due to the inflation pressure of the bag body when a predetermined high load is applied. An instrument panel equipped with an air bag door including: a base material for an air bag door that is wider than an opening for expansion and is deformed by an inflation pressure of a bag body. When the airbag door base material is deployed around the door hinge portion, both side portions of the airbag door base material are deformed by the inflation pressure of the bag body to form a substantially U-shape. An air bar provided with guide means. Instrument panel with a Gudoa. 6. A hole formed in a portion of an airbag door base material opposite to a door hinge portion substantially in parallel with the door hinge portion, and formed in a straight portion and an end portion of the straight portion on the swelling opening side. And the head has a diameter larger than the hole of the slit and the shaft has a diameter slightly larger than the straight portion, and the base material for the airbag door and the base material body are provided through the slit. The instrument panel provided with the airbag door according to claim 5, wherein the deformation guide means is configured by a connecting means for connecting. 7. A base material main body having a swelling opening of a bag body that swells when a predetermined high load is applied, and a base material for an airbag door arranged in the swelling opening of the base material main body. An instrument panel provided with an airbag door configured to include a foam layer disposed on the base body and the base material for an airbag door, and a skin covering the surface of the foam layer, The base material for the airbag door is fixed to the peripheral portion of the swelling opening in the base material body, and the bag body is expanded by being inwardly extended and divided by the base material for the airbag door. An airbag door characterized in that an extension portion that can be deformed by pressure is provided, and that a rupture portion that is ruptured by the inflation pressure of the bag body when a predetermined high load is applied is provided on the outer skin along the dividing line of the extension portion. Instrument panel with. 8. The instrument panel having an airbag door according to claim 7, wherein the airbag door substrate having the extension is fixed to a lower surface of a substrate body. 9. A base material main body having a swelling opening of a bag body that swells when a predetermined high load is applied, and an air bag door base material arranged in the swelling opening of the base material main body. A foam layer disposed on the base material body and the air bag door base material, and a skin having a rupture portion which covers the surface of the foam layer and which is broken by the inflation pressure of the bag body when a predetermined high load is applied. An instrument panel including an airbag door configured to include a bag-shaped recess at a peripheral portion of a swelling opening in a base body. Instrument panel. 10. A base material main body provided with a swelling opening of a bag body that swells when a predetermined high load is applied, and an air bag door base material arranged in the swelling opening of the base material main body. A foam layer disposed on the base material body and the air bag door base material, and a skin having a rupture portion which covers the surface of the foam layer and which is broken by the inflation pressure of the bag body when a predetermined high load is applied. An instrument panel having an airbag door configured to include a slit, which is formed by continuously providing a slit having a substantially V-shaped cross-section and penetrating from the back surface side of the skin. Instrument panel equipped with an airbag door featuring. 11. The airbag door according to claim 10, wherein the breakage portion is configured by arranging the slits in a zigzag pattern in which ends of the slits are arranged close to each other. instrument panel. 12. A base material main body having a swelling opening of a bag body that swells when a predetermined high load is applied, and a base material for an airbag door arranged in the swelling opening of the base material main body. An instrument panel provided with an airbag door configured to include a foam layer disposed on the base body and the base material for an airbag door, and a skin covering the surface of the foam layer, The base has a rupture part that breaks due to the inflation pressure of the bag when a predetermined high load is applied, and the protruding wall part that protrudes from the peripheral edge of the bulging opening to the back side of the skin along the rupture part. An instrument panel equipped with an airbag door, which is characterized in that 13. The base material for an airbag door is fixed to a base material body by subjecting a part of the projecting wall portion to post-processing such as thermal caulking. Instrument panel with airbag door.