JPH09301013A - Structure for car interior side member integrally having air bag door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly burst a burst expected part at operating time and prevent easily cracking at normal time, by providing a reinforcing resin member in a reverse surface of a car interior side member main unit in an air bag door reverse side, and thinly forming a bending part to a surface side of the car interior side member main unit so that the reinforcing resin member divides the burst expected part of the car interior side member main unit. SOLUTION: A car interior side member main unit 21 is constituted by a hard resin, in a reverse side thereof, a reinforcing resin member 31 is provided, a burst expected part 15 opening an air bag door 11, when an air bag A is inflated, is provided. A divided part 22 formed along the burst expected part 15 is bitten by the reinforcing resin member 31, to be exposed by a surface of the car room side member main unit 21. The reinforcing resin member 31 is made as a resin softer than a hard resin of the car room side member main unit 21, to be provide in a reverse surface side of the air bag door 11 by smoothing bursting at operating time, an almost reverse V-shaped bending part 32 is formed so as to protrude to a side of the car interior side member main unit 21. The bending part 32, in the case of pressing in the vicinity of the burst expected part 15 from a surface of a car interior side member 10 at normal time, has large rigidity, so as to prevent cracking of the burst expected part 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a vehicle interior side member integrally having an airbag door.

[0002]

2. Description of the Related Art In recent years, airbag devices have come to be installed in passenger seats of automobiles. This airbag device includes an airbag, a storage case called a canister in which the airbag is stored, and an operating device (inflator). The airbag device is provided on the back side of a passenger compartment side member such as an instrument panel on the front of the passenger seat. It is attached. The airbag section of the instrument panel provided with the airbag device has a deployment opening for the airbag, which is normally covered by an airbag door having an appearance similar to that of the instrument panel. It is being appreciated.
Then, when the automobile receives a large impact due to a collision or the like, the airbag housed in the airbag case is activated and inflates to push the airbag door from the inside to open it.

However, in the structure in which the airbag deployment opening and the airbag door are formed separately, the periphery of the airbag door may be surrounded by slight variations in product dimensions or product shrinkage due to use. Gaps are likely to occur and the appearance of the instrument panel may be impaired. Also, attaching the airbag door to the airbag deployment opening of the instrument panel in a subsequent process increases the number of steps.

Therefore, recently, FIG. 19 and its f-f
An instrument panel 160 shown in FIG. 20, which is a cross section.
Hard resin 16 made of polypropylene resin, etc.
1. A notch-like thin-walled breakable portion 162 is formed on the back surface so that the planar shape thereof is substantially U-shaped as in this example, or is substantially H-shaped (not shown) to partition the airbag door Da. At the same time, it is proposed that the back surface of the airbag door Da is lined with a reinforcing plate 163 such as an aluminum plate or an iron plate. Reference numeral 164 is a hinge portion formed between the ends of the breakable portion 162, A is an airbag, and C is an airbag housing case. With this structure, as shown in FIG. 21, when the airbag A is inflated, the breakable portion 162 of the instrument panel 160 is broken and the airbag door Da is opened. 162a is a part where the planned breaking portion 162 is broken.

Further, as shown in FIG. 22 and a partially enlarged view of FIG. 23, a base material 1 made of a hard resin such as polypropylene resin and having a deployment opening O for an airbag is formed.
74, synthetic resin foam 171 such as polyurethane foam
There is known a vehicle-cabin-side member (instrument panel) P which is integrally laminated and whose surface is covered with a synthetic resin skin 172. Reference numeral 173 is a thin-walled breakable portion formed on the skin 172, 175 is a core material for an air bag door, 176 is an attachment member for fixing the passenger compartment side member P and the air bag accommodating case C, D is an air bag door, and T is foaming. It is a part to be broken of the body 171. According to this structure, FIG.
As shown in 4, when the airbag is inflated, the airbag door D
Is pushed by the airbag A from the back side and pushes up the air bag door core material 175 made of a metal plate or the like, and the pushing force ruptures the planned breakage portion T of the foam and the thin breakage planned portion 173 of the skin 172 to break the air. The bag door D opens.
Reference numerals Ta and Tb are fractured portions of the separated foamed material, and 177 is a hinge portion.

However, in the former type, that is, in the case where the vehicle interior side member is made of hard resin, the thickness of the portion to be broken must be extremely thin so that the airbag is quickly broken due to the expansion, It was not easy to design because of trade-offs. Moreover, if the thickness of the portion to be broken is extremely thin, when the surface of the portion to be broken is pressed by an occupant or the like in the flat state, a crack or the like may occur in the portion to be broken.

On the other hand, in the latter type, that is, in the case where the vehicle interior side member is composed of a hard resin base material, a foam and a skin, an iron plate or the like is formed in the airbag deployment opening formed in the base material. Since the core material for the airbag door must be securely fixed, the molding work is complicated and the cost is increased.

Further, in any of the above-mentioned types, the airbag is inflated and deflated after a predetermined time has elapsed after the airbag door was pushed open. At that time, the airbag door remains open without being completely closed, and the break portions 162a, Ta of the airbag doors Da, D are directed upward. The broken portion of the airbag door is a fracture surface of hard resin or the core material 1 for the airbag door.
Since the end face of 75 was exposed, it was hard and not preferable.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and a portion to be ruptured is promptly ruptured by the expansion of the airbag to open the airbag door. (EN) It is possible to provide a structure of a highly safe vehicle interior side member in which cracks are unlikely to occur and a hard resin end surface at a broken portion of an airbag door is covered with a softer resin.

[0010]

According to a first aspect of the present invention, a rupture-scheduled portion is formed in a substantially H-shaped or U-shaped shape on a resin-made passenger compartment member, and the rupture-scheduled portion is formed from the ruptured portion when the airbag is inflated. In a vehicle interior side member integrally having an airbag door that breaks and opens, a vehicle interior side member main body made of a hard resin and a resin softer than the hard resin of the vehicle interior side member main body of the airbag door It is integrally provided on the back surface of the passenger compartment member main body substantially corresponding to the back side, and is bent toward the passenger compartment member main body front surface side so as to divide the passenger compartment member main body at the breakable portion, and the bent portion is thin. And a reinforcing resin member exposed on the surface of the main body of the passenger compartment member, the structure of the passenger compartment member integrally having an airbag door.

According to the first aspect of the present invention, the vehicle interior side member is made of a hard resin for defining the outer shape of the vehicle interior side member main body, and the rear surface of the airbag interior door main body is a rear surface of the airbag door. It is made of a reinforcing resin member provided in a portion corresponding to the portion, and the airbag door portion is pushed from the inside by the expansion of the airbag and is fractured at the expected fracture portion.

In the portion to be broken, the reinforcing resin member, which is softer than the hard resin of the passenger compartment member body, is bent toward the passenger compartment member body surface side so as to divide the passenger compartment member body, and the passenger compartment member body is bent. Since it is exposed on the surface, the reinforcing resin member that fills the divided portion of the passenger compartment-side member body breaks due to the expansion of the airbag. Therefore, the reinforcing resin member, which is softer than the hard resin of the passenger compartment body, breaks, so that the breakage occurs quickly. Further, because of the easiness of breaking, the thickness of the reinforcing resin member in the portion to be broken can be set thicker than in the case of the hard resin, the settable thickness range is widened, and the molding is easy.

Further, as described above, at the portion to be broken, the dividing portion is formed in the main body of the passenger compartment by the reinforcing resin member,
The inner peripheral surface (divided cross section) of the divided portion is in a state of being covered with a reinforcing resin member that is bent toward the front surface side of the vehicle body member body. Therefore, the fractured end face of the airbag door opened due to the fracture of the reinforcing resin member is formed of a reinforcing resin member that covers the inner peripheral surface of the dividing portion of the passenger compartment body, and is more flexible than hard resin (reinforcing resin member). ) Will be hidden.

According to a second aspect of the present invention, in the first aspect, the reinforcing resin member is bent toward the front surface side of the passenger compartment side member body between both ends of the portion to be broken to form a bent portion for the hinge, and at this portion. It is characterized in that the thickness of the vehicle body member main body is thin.

According to the second aspect of the present invention, since the rigid vehicle compartment side member main body is thinned at the hinge portion and has low rigidity, when the airbag is inflated, the portion to be fractured is broken,
The airbag door quickly bends at the hinge and opens to the inside of the vehicle, allowing the airbag to deploy smoothly. In particular, in the invention of claim 1, since the reinforcing resin member is integrally provided on the back surface of the body member on the passenger compartment side, the thickness of the hinge portion may increase and the rigidity may increase. However, according to the invention of claim 2, The rigidity of the hinge portion is reduced, and the airbag door can be opened more quickly.
As a result, before the airbag door is sufficiently bent toward the vehicle interior side, the airbag protrudes into the vehicle interior from the gap between the planned breakage part (the planned breakage part after breakage), which hinders the smooth deployment of the airbag. Can be prevented more reliably. Furthermore, since it is not necessary to provide a recess for reducing the rigidity of the hinge portion on the front surface side of the airbag door, the appearance of the vehicle interior side member becomes good.

On the other hand, according to the third aspect of the present invention, the portion to be broken is formed in the resin-made passenger compartment member in a substantially H-shape or U-shape,
In a vehicle interior side member integrally having an airbag door that is broken and opened from the planned fracture portion when an airbag is inflated, a vehicle interior side member main body in which a foam and a skin are laminated on a base material made of hard resin, and the base. Made of a resin that is softer than the hard resin of the material and is integrally provided on the back surface of the base material that substantially corresponds to the back side of the airbag door, and is bent toward the front surface side of the base material so as to divide the base material at the portion to be broken. The structure of the vehicle interior side member integrally having the airbag door is characterized in that the bent portion is thin and is made of a reinforcing resin member exposed on the surface of the base material.

According to the third aspect of the invention, the vehicle interior side member is a vehicle interior side member body in which a foam and a skin are laminated on a hard resin base material, and air on the back surface of the base material. The reinforcing resin member is provided in a portion corresponding to the back surface of the bag door. In the invention of claim 3, the base material has the same configuration as that of the vehicle interior side member main body described in claim 1. Then, due to the expansion of the airbag, the reinforcing resin member is rapidly broken at the planned breakage portion of the base material, and the foam and the skin of the portion corresponding to the planned breakage portion of the base material are also broken, and the airbag door is open. Due to the same reason as that of the vehicle-body-side member body in the first aspect, the fractured end face of the airbag door is hidden by the reinforcing resin member which is softer than the hard resin of the base material.

The invention according to claim 4 is characterized in that the reinforcing resin member according to claim 3 is in contact with the back surface of the skin at the portion to be broken. In the invention of claim 4, since the foam is not interposed between the skin of the portion to be broken and the reinforcing resin member, it is possible to prevent the foam from scattering when the member on the passenger compartment side is broken at the portion to be broken. it can.

The invention of claim 5 is characterized in that the reinforcing resin member according to claim 3 or 4 is bent toward the base material surface side between both ends of the portion to be broken to form a bent portion for hinge, and the base portion is formed at this portion. The feature is that the material is thin. According to the invention of claim 5, since the rigid base material is thinned at the hinge portion so that the rigidity is low, the airbag door is swiftly hinged at the hinge portion following the rupture of the portion to be ruptured when the airbag is inflated. It bends to the side and opens to the inside of the passenger compartment, achieving a smooth airbag deployment.

[0020]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the accompanying drawings. First, an embodiment of the invention of claim 1 will be described. FIG. 1 is a perspective view of a vehicle compartment side member of the embodiment,
2 is a perspective view of the vicinity of the airbag door, FIG. 3 is a sectional view taken along the line aa of FIG. 1, FIG. 4 is a sectional view showing the airbag inflated, and FIG. 5 is a sectional view showing the airbag deflated.

The passenger compartment member 10 shown in FIGS. 1 to 3 is
It constitutes an instrument panel of a vehicle and has an airbag door 11 integrally on the passenger side. This passenger compartment member 1
0 consists of the passenger compartment side member main body 21 and the reinforcing resin member 31 integrally provided on the back side of the passenger compartment side member main body 21,
A to-be-ruptured portion 15 that breaks when the airbag A inflates and allows the airbag door 11 to open is formed in a substantially H shape in a plan view so as to partition the airbag door 11. The plan-view shape of the breakable portion 15 may be substantially U-shaped like the breakable portion 162 shown in FIG. Reference numeral 12 is a portion that serves as a hinge portion when the airbag door is opened, and is located between the two terminals 16, 16 and between the terminals 17, 17 of the breakable portion 15.

The passenger compartment-side member main body 21 is the passenger compartment-side member 1
It defines the outer shape of 0 and constitutes its surface,
It is a hard resin molded product formed into a required shape by injection molding or the like. The hard resin that constitutes the passenger compartment member body 21 is
It has rigidity and strength required for the passenger compartment member, and a general-purpose hard resin such as polypropylene resin (PP) is used. In particular, in terms of rigidity and shape retention, flexural modulus (JIS-K7203 compliant) 20000 kgf / c
m ² or more, heat distortion temperature (JIS-K7207 compliant) 12
It is preferably 0 ° C. or higher (4.6 kgf load). In this embodiment, the bending elastic modulus is 27,000 kgf / cm ² , the heat distortion temperature is 132 ° C., and the thickness is 2.5 mm.

In addition, at the portion to be fractured 15 of the passenger compartment side member body 21, a dividing portion 22 is provided along the portion to be fractured 15.
The reinforcing resin member 31 on the rear surface of the passenger compartment side member main body 21 bites into the divided portion 22 and is exposed on the surface of the passenger compartment side member main body 21. The width (division interval) of the dividing portion 22 is appropriately set, but is generally about 2 mm or less. In addition, it is preferable that the dividing portion 22 be made almost indistinguishable from the outer surface by making the casing main body 21 and the reinforcing resin member 31 have the same color and integrally molding.

The reinforcing resin member 31 has a portion 15 to be broken.
Is for facilitating breakage of the passenger compartment member 10 and for concealing the end face of the airbag door 11 at the breakage portion, and is made of a resin softer than the hard resin forming the passenger compartment member body 21. Airbag door 1 of the main body 21 on the passenger compartment side
1 is integrally provided on the back side.

The reinforcing resin member 31 of this embodiment has a thickness of 3
mm, length 150 mm, width 320 mm rectangular plate,
A bent portion 32 that is bent in a substantially inverted V shape so as to project toward the passenger compartment side member main body 21 is formed to have a substantially H shape in plan view. The thickness of the apex of the bent portion 32 is made thinner than other portions so that the bent portion 32 is easily broken at the apex. Generally, it is about 0.3 to 0.5 mm.

The bent portion 32, which is bent toward the front surface side of the passenger compartment side member body 21 as described above, has the passenger compartment member 10 in a flat state.
When the area near the planned breakage portion 15 is pushed from the surface of the, it becomes a direction substantially parallel to the pushing direction and exerts great rigidity.
The effect of increasing the strength in the normal state is high, and cracks in the expected breakage portion 15 are prevented.

Further, in the reinforcing resin member 31 of this embodiment, a frame portion 33 is provided upright near the periphery of the back surface of the reinforcing resin member 31. The frame portion 33 is fitted on the outer periphery of the opening end portion of the airbag accommodating case C and is used to fix the airbag case C and the passenger compartment member 10. The fixing is performed using a fixing means such as a bolt (not shown).

The reinforcing resin member 31 is made of a resin that is softer than the hard resin forming the passenger compartment side member body 21,
Flexural modulus (JIS-K7203 compliant) 1000kgf
/ Cm ^{2 to} 5000 kgf / cm ² of the resin is preferable in that it easily breaks and reinforces the airbag door 11 portion. The vehicle body member 21 has a bending elastic modulus of 27,000 k.
In this example made of PP with gf / cm ² , the reinforcing resin member 31 has a flexural modulus of 3000 kgf / cm ^2.
Of TPO (polyolefin thermoplastic elastomer) resin.

The vehicle-cabin-side member 10 can be easily molded by injection molding or the like. That is,
First, the reinforcing resin member 31 is formed by injection molding or the like.
Next, the reinforcing resin member 31 is arranged as an insert in a molding die, and a hard resin is injected to form the vehicle-cabin-side member body 21 integrated with the reinforcing resin member 31,
The desired passenger compartment member 10 can be obtained.

In a normal state, the vehicle-cabin-side member 10 having the above-described structure is pressed against the surface due to the strength increasing action of the bent portion 32 of the reinforcing resin member 31 in the breakable portion 15 as described above. It is possible to prevent the occurrence of cracks in the breakable portion 15.

When a shock is applied to the automobile due to a collision or the like, the airbag A is inflated by the operation of the inflator I, which pushes the back surface of the reinforcing resin member 31 and breaks the thin portion 15 to be broken. As shown in FIG. 4, the airbag door 11 is bent and opened by the hinge 12, and the airbag A is deployed in the vehicle. Reference numeral 15a is a broken portion. When the airbag is inflated, the vehicle body side member main body 21 made of a hard resin is preliminarily divided by the reinforcing resin member 31 made of a softer resin at the portion 15 to be broken. Concentrate on the reinforcing resin member 31 in the breakable portion 15 and break efficiently.
Moreover, since the reinforcing resin member 31 is made of a resin that is softer than the hard resin of the passenger compartment-side member main body 21, the breakage can be made more smoothly and quickly.

The airbag A, which has once inflated, collapses as shown in FIG. 5 after a predetermined time has elapsed. At that time, in the airbag door 11 that is left open in the vehicle compartment, the inner peripheral surface (section surface) 22a of the divided portion of the vehicle body member 21 is bent at the breakage portion 15a of the reinforcing resin member 31. Since it is hidden by the portion 32 and the hard resin is not exposed, it is preferable as a vehicle interior member.

Next, an embodiment of the invention of claim 2 will be described. 6 is a perspective view showing the vicinity of the airbag door in the embodiment, FIG. 7 is a sectional view taken along line bb of FIG. 6, FIG. 8 is an enlarged sectional view of a hinge portion thereof, and FIG. 9 is a sectional view taken along line cc of FIG. , Figure 1
0 is a perspective view showing the vicinity of the airbag door in another embodiment of the invention described in claim 2, and FIG. 11 is d- of FIG.
It is d sectional drawing.

According to the second aspect of the present invention, as shown in FIGS. 6 to 9, the reinforcing resin member 31A provided on the back side of the airbag door 11A of the passenger compartment member 10A.
Is bent between the two terminals 16A, 16A, 17A, 17A of the planned breakage portion 15A of the passenger compartment member body 21A, that is, the hinge portions 12A, 13A, and is bent toward the front surface side of the passenger compartment member body 21A for hinges. Bent portions 34A and 35A are formed, and the thickness of the passenger compartment side member main body 21A is thinned by the hinge portions 12A and 13A. The other points are the same as the invention described in claim 1. Reference numeral 32A indicates a bent portion of the reinforcing resin member 31A at the planned breakage portion.

According to the second aspect of the present invention, in the hinge portions 12A and 13A, the rigid body member 21A on the vehicle interior side is thinned, so that the hinge is opened when the airbag door 11A is opened due to the inflation of the airbag. Part 12A13
A easily bends, and the airbag door 11A opens quickly. Moreover, since the recesses for the hinge portions do not exist on the surfaces (outer surfaces) of the hinge portions 12A and 13A, the appearance of the vehicle interior side member 10A is good.

FIG. 10 is a perspective view showing the vicinity of an airbag door in another embodiment of the invention described in claim 2, FIG.
1 is a sectional view taken along line d-d of FIG. In the vehicle-cabin-side member 10B of this embodiment, the to-be-ruptured portion 15B has a substantially U shape,
The structure is the same as that of the embodiment of FIGS. 6 to 9 except that the reinforcing resin member 31B is formed according to the shape. Reference numeral 11B is an airbag door, 12B is a hinge portion, 16B is a portion between both terminals of a portion to be broken, 21B is a vehicle body member main body, 32B is a bent portion of the reinforcing resin member in the portion to be broken, and 34B is a bent portion for hinge. is there.

Next, an embodiment of the invention of claim 3 will be described. FIG. 12 is a sectional view of a vehicle-cabin-side member according to an embodiment of the invention described in claim 3, and FIG. 13 is a sectional view showing the same embodiment when an airbag is inflated. Vehicle compartment side member 40 shown
Is used as an instrument panel,
An airbag door 41 is integrally formed, and a passenger compartment side member main body 45
And a reinforcing resin member 57. Vehicle side member body 45
Consists of a base material 46, a foam body 51 and a skin 55,
The outer shape of the passenger compartment member 40 is configured. Reference numeral 52 is an imaginary line indicating a planned breakage portion of the foam, and forms a substantially H shape in plan view. The planned breakage portion 52 of the foam, the planned breakage portion 47 of the base material, and the planned breakage portion 56 of the skin constitute a planned breakage portion of the vehicle interior member, and the airbag door 41 is partitioned.

The base material 46 is for holding the shape of the passenger compartment side member 40 and for imparting rigidity to withstand a predetermined pressing force in a normal state. It is made of a hard resin product formed by. The type, thickness, physical properties, etc. of the hard resin forming the base material 46 are the same as those of the vehicle-body-side member body 21 shown in the embodiment of claim 1.
The same as the hard resin of is preferable. In addition, this base material 4
6, a base material breakable portion 47 is formed at a position corresponding to the breakable portions 52 and 56 of the other members. At the breakable portion 47, the base material 4 which is the back side of the airbag door 41
The reinforcing resin member 57 provided on the back surface of 6 cuts into the base material 46 to cut it. The base material 46 of this example has a flexural modulus of 27,000 kgf / c.
It is made of PP with m ² , a heat distortion temperature of 132 ° C., and a thickness of 2.5 mm.

The foam 51 is for enhancing the cushioning property of the surface of the vehicle interior side member 40, and an elastic foam such as polyurethane foam is suitable. The skin 55 constitutes the surface of the vehicle interior member 40, and is made of plastic leather or the like, and has a predetermined shape by slush molding or vacuum molding. The skin 55 has a thin skin breakable portion 56 including a V-shaped groove at a position corresponding to the breakable portions 47 and 52 of the other members.

On the other hand, the reinforcing resin member 57 is the airbag A.
In order to make it possible to quickly rupture the rupture scheduled portion 52 when inflated and to reinforce the rupture expected portion 52 in the normal state, it is integrally formed on the back surface of the base material 46 which is the back side of the airbag doors 41, 41. It is provided. The reinforcing resin member 57 is bent in a substantially inverted V-shape toward the front surface side of the vehicle-side member 40 of the base material 46 at the planned base material breakage portion 47, and cuts into the base material 46 to divide the base material 46. The apex portion of the bent portion 58 exposed on the surface of the base material 46 becomes thin to fill the breakable portion 47 for the base material.

The reinforcing resin member 57 is made of a resin that is softer than the base material 46, and the thickness, type and physical properties of the resin are
This is the same as the case of the reinforcing resin member 31 shown in the embodiment of claim 1. The reinforcing resin member 57 of this embodiment is made of TPO (polyolefin thermoplastic elastomer) resin having a flexural modulus of 3000 kgf / cm ² . In addition, the reinforcing resin member 57 of this embodiment has a substantially rectangular shape, and a frame portion 59 for attachment to the airbag accommodating case C is formed on the back surface thereof.
Are formed inside the peripheral edge of the reinforcing resin member 57.

In the molding of the passenger compartment side member 40, first, the reinforcing resin member 57 is formed by injection molding or the like, the reinforcing resin member 57 is arranged as an insert in the molding die, and the base material 46 is reinforced resin. It is formed integrally with the member 57. Next, the base material 46 in which the reinforcing resin member 57 is integrated
Then, the outer skin 55 is set in a foaming mold, and a foaming raw material is injected between the base material 46 and the outer skin 55 to form a foam 51 integrated with the base material 46 and the outer skin 55. After that, if the molded product is taken out from the foam molding die, the desired vehicle interior side member 4
0 is obtained.

In the passenger compartment member 40 having the above structure, when the airbag A is inflated, the base material 46 is pushed and the thin reinforcing resin member 57 is broken at the base material breakable portion 47. that time,
In the planned breakage portion 47 for the base material, the base material 46 made of a hard resin is used.
Since the reinforcing resin member 57 is divided, stress concentrates on the reinforcing resin member 57 that fills the divided portion, and since the reinforcing resin member 57 is softer than the base material, it breaks extremely quickly. Almost at the same time, the foam body 51 breaks at the planned breakage portion 52, and the skin 55 breaks at the skin breakage planned portion 56. Then, as shown in FIG. 13, the airbag doors 41, 41 are pushed open, the airbag A is deployed in the vehicle compartment, and the airbag A is deflated after a lapse of time. The fractured portion 41 of the airbag door 41 thus fractured and opened
At the end faces of a and 41a, the base material 46 made of hard resin is softer than the hard resin.
It is concealed by 8 and is preferable as a vehicle interior member.

The foam body 51 may be formed integrally with the outer skin 55 as a lining material for the outer skin 55. FIG. 14 is a cross-sectional view showing a planned breakage portion of a vehicle interior side member using such a skin. In the example shown in this figure, the skin 55A is made of a soft vinyl chloride resin sheet, and the back surface thereof is integrally lined with a foam 51A made of polypropylene foam. It should be noted that the surface of the breakable portion 56A of the outer skin 55A is made into a groove to improve the decoration. Further, a V groove (not shown) reaching the inside of the back side of the scheduled breakage portion 56A of the skin is appropriately formed on the back surface of the scheduled breakage portion 52A of the foam 51A. Reference numeral 46A is a base material, 4
7A is a portion of the base material to be broken, 57A is a reinforcing resin member, 58
A is a bent portion of the reinforcing resin member in the portion to be broken.

Next, the invention described in claim 4 will be described. The vehicle-cabin-side member of the invention described in claim 4 is similar to the invention described in claim 3 in that the foam and the skin are laminated on the base material, and FIG. It is sectional drawing which shows a planned part.

According to the fourth aspect of the present invention, as shown in FIG. 15, the reinforcing resin member 5 is provided at the position of the breakable portion 47B of the base material 46B and the breakable portion 52B of the foam 51B.
The bent portion 58B of 7B divides the base material 46B and the foamed body 51B and is in contact with the back surface of the skin in the portion to be broken 56B of the skin 55B, and the other structure is the same as that of the invention described in claim 3. . In an embodiment of the present invention,
Since the foam 51B is not interposed between the planned breakage portion 56B of the outer skin 55B and the bent portion 58B of the reinforcing resin member 57B, the foamed body 51B is broken when the planned breakage portion is broken due to the inflation of the airbag.
There is no fear of being scattered. Note that, also in the invention described in claim 4, as in the other embodiment shown in FIG. 16, a concave groove may be provided on the surface of the breakable portion 56C of the skin 55C to enhance the decorativeness. Reference numeral 46C is a base material, 47C is a breakable portion of the base material, 51C is a foamed body, 52C is a planned breakage portion of the foamed body, 57C is a reinforcing resin member, and 58C is a bent portion of the reinforcing resin member at the breakable portion.

FIG. 17 is a perspective view showing the vicinity of the airbag door in an embodiment of the invention described in claim 5.
The invention described in claim 5 is similar to the invention described in claim 3 or 4, and the foam 51 is formed on the base material 46D.
D and the skin 55D are laminated, and both ends 43D, 43D, 44D, 44 of the breakable portion 47D of the base material
Reinforcement resin member 57D at the hinge portions 48D, 48D between D
Is bent to the front surface side of the base material 46D to bend the hinge 49D.
Is formed, and the thickness of the base material 46D is thinned at this portion. Therefore, when the airbag doors 41D, 41D are opened due to the inflation of the airbag, the hinge portion 48
Air bag doors 41D, 4 with easy bending with D, 48D
1D opens quickly. Reference numeral 47D is a bent portion of the reinforcing resin member 57D at the planned break portion, 52D is a planned break portion of the foam 51D, and 56D is a predicted break portion of the outer skin 55D.

In the example of FIG. 17, the foam 51D is interposed between the bent portion 47D of the reinforcing resin member and the back surface of the outer skin 55D at the planned breakage portion, but the bent portion 47D of the reinforcing resin member is foamed. In some cases, the back surface of the planned breakage portion 56D of the epidermis may be brought into contact with the back surface of the skin without the body 51D.

Also, in the invention described in claims 3 to 5, the breakable portion is appropriately U-shaped in addition to the substantially H-shaped.

[0050]

As shown and described above, according to the invention described in claim 1, since the portion to be broken is composed of the reinforcing resin member which is softer than the passenger compartment side member main body, the airbag When inflated, it ruptures quickly and surely to open the airbag door. Furthermore, since the reinforcing resin member is bent toward the surface side of the passenger compartment side member at the portion to be broken, when the surface of the member on the passenger compartment side is pressed in a flat state, the strength in the pressing direction is high and the portion to be broken is To prevent cracks from occurring.
In addition, since the vehicle body side member main body made of a hard resin material is covered with the reinforcing resin member which is softer than the end face of the broken portion of the airbag door, it is preferable as the vehicle interior side member.

Further, in the invention described in claim 2, in the invention of claim 1, since the rigid vehicle compartment side member main body is thinned at the hinge portion to have low rigidity, In addition to the effects of the invention described, the following effects are exhibited.
That is, when the airbag is inflated, the airbag door is quickly bent at the hinge portion to open toward the passenger compartment, following the breakage at the planned breakage portion, and the airbag is smoothly deployed.

On the other hand, in the invention described in claim 3, since the portion to be broken of the base material is made of the reinforcing resin member which is softer than the base material, the airbag is promptly expanded when the airbag is inflated.
And surely rupture and open the airbag door. Furthermore, since the reinforcing resin member is bent toward the front surface side of the passenger compartment side member at the planned breakage portion of the base material, even when the passenger compartment side member surface is pressed in a flat state, The strength is high, and it is possible to prevent cracks and the like from occurring in the part to be broken. In addition, since the base material made of a hard resin material is covered by the reinforcing resin member which is softer than the end surface of the broken portion of the airbag door, it is preferable as a vehicle interior member.

Further, in the invention of claim 4, in claim 3, since the reinforcing resin member is in contact with the back surface of the skin at the portion to be broken, the foam is interposed between the skin at the portion to be broken and the reinforcing resin member. Without doing so, there is no fear that the foam will scatter when the vehicle-cabin-side member breaks at the planned breakage portion.

Further, the invention of claim 5 is characterized in that the reinforcing resin member according to claim 3 or 4 is bent toward the base material surface side between both ends of the portion to be broken to form a bent portion for hinge, and the base material is formed at the portion. Since the thickness of the hinge is thin, the rigidity is low at the hinge part, and when the airbag is inflated, following the rupture at the planned rupture part,
The airbag door quickly bends at the hinge and opens to the inside of the vehicle, allowing the airbag to deploy smoothly.

[Brief description of drawings]

FIG. 1 is a perspective view of a passenger compartment member according to an embodiment of the invention described in claim 1. FIG.

FIG. 2 is an enlarged perspective view showing the vicinity of the airbag door of FIG.

FIG. 3 is a sectional view taken along line aa of FIG. 1;

FIG. 4 is a cross-sectional view showing the airbag of the embodiment when inflated.

FIG. 5 is a cross-sectional view showing a state in which an airbag that has once inflated is deflated.

FIG. 6 is a perspective view showing the vicinity of an airbag door in an embodiment of the invention described in claim 2;

FIG. 7 is a sectional view taken along the line bb of FIG. 6;

FIG. 8 is an enlarged cross-sectional view of the hinge portion.

9 is a sectional view taken along line cc of FIG.

FIG. 10 is a perspective view showing the vicinity of an airbag door in another embodiment of the invention described in claim 2.

11 is a sectional view taken along line d-d of FIG.

FIG. 12 is a cross-sectional view of a vehicle interior side member according to an embodiment of the invention as set forth in claim 3;

FIG. 13 is a cross-sectional view showing the same embodiment when the airbag is inflated.

FIG. 14 is a cross-sectional view showing a portion to be broken according to another embodiment of the present invention.

FIG. 15 is a cross-sectional view showing a portion to be broken in an embodiment of the invention described in claim 4;

FIG. 16 is a cross-sectional view showing a planned breakage portion in another example.

FIG. 17 is a perspective view showing the vicinity of an airbag door in an embodiment of the invention described in claim 5;

18 is a sectional view taken along the line ee in FIG. 17;

FIG. 19 is a perspective view of a vehicle interior side member integrally including a general airbag door.

FIG. 20 is an ff sectional view thereof.

FIG. 21 is a cross-sectional view showing the airbag inflated.

FIG. 22 is a cross-sectional view of another conventional example of a vehicle-cabin-side member that integrally has an airbag door.

FIG. 23 is a cross-sectional view showing a part of the device in an enlarged manner.

FIG. 24 is a cross-sectional view showing the airbag when inflated.

[Explanation of symbols]

11, 11A, 11B, 41, 41A, 41B, 41
C, 41D: Airbag doors 15, 15A, 15B: Breaking planned portions 21, 21A, 21B, 45: Vehicle compartment side member main body 31, 31A, 31B, 57, 57A, 57B, 57
C, 57D: Reinforcing resin member 32, 32A, 32B, 58, 58A, 58B, 58
C, 58D: Bent portion of reinforcing resin member 34A, 34B, 35A, 49D: Bent portion for hinge 46, 46A, 46B, 46C, 46D: Base material 47, 47A, 47B, 47C, 47D: Breaking portion of base material 52, 52A, 52B, 52C, 52D: Part to be ruptured of foam 51, 51A, 51B, 51C, 51D: Foam 55A, 55B, 55C, 55D: Skin 56, 56A, 56B, 56C, 56D: Break of skin Scheduled section

Claims (5)

[Claims] 1. A substantially H-shaped or substantially U-shaped resin-made passenger compartment member.
A vehicle-body-side member that integrally includes an airbag door that has a planned breakage portion formed in a letter-like shape and that is opened by breaking from the planned breakage portion when the airbag is inflated, and It is made of a resin that is softer than the hard resin of the passenger compartment member body, and is integrally provided on the back surface of the passenger compartment member body that substantially corresponds to the back side of the airbag door. As described above, the airbag door is integrally formed with a reinforcing resin member that is bent toward the vehicle body side member body surface side, and the bent portion is thin and is exposed on the vehicle body side member body surface. The structure of the passenger compartment side member. 2. The vehicle body member body according to claim 1, wherein the reinforcing resin member is bent between the two terminals of the portion to be broken toward the front surface side of the vehicle body member body to form a hinge bent portion. The structure of the vehicle interior side member integrally having an airbag door, characterized in that the thickness of the vehicle is reduced. 3. A vehicle having a substantially H-shaped or U-shaped breakable portion formed in a resin-cabin-side member, and integrally having an airbag door that breaks and opens from the breakable portion when an airbag is inflated. In the room side member, a body side member body in which a foam and a skin are laminated on a base material made of a hard resin, and a resin softer than the hard resin of the base material and substantially equivalent to the back side of the airbag door. A reinforcing resin member that is integrally provided on the back surface of the base material and is bent toward the surface of the base material so as to divide the base material at the portion to be broken, and the bent portion becomes thin and is exposed on the surface of the base material. A structure of a member on the vehicle interior side integrally having an airbag door, characterized by comprising: 4. The structure of a vehicle interior side member integrally having an airbag door according to claim 3, wherein the reinforcing resin member is in contact with the back surface of the outer skin at a portion to be broken. 5. The reinforcing resin member according to claim 3 or 4, wherein the reinforcing resin member is bent toward the base material surface side between both ends of the breakable portion to form a bent portion for hinge, and the thickness of the base material is thinned at this portion. The structure of the vehicle interior side member integrally having an airbag door.