JP2005096594A - Interior article with air bag door part for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a position relationship of a flap part and a breaking scheduled part more accurate. <P>SOLUTION: An extension part 53 adjacent to an intersection part 57 is provided at a tip end of the flap part 25 by extending so as to superposing on the intersection part 57 of an inner peripheral part of the flap part 25 and a frame part 17. A shelf part 55 comprising a receiving surface part 55a for supporting the extension part 53 when a load is applied to an air bag door part from a front surface side; and a restriction surface part 55b extending from the receiving surface part 55a so as to approximately cross, positioned just below a shooting port 19 than the breaking scheduled part 11 at a tip end side of the flap part 25 and restricting movement so as to position the extension part 53 relative to the breaking scheduled part 11 is provided at the intersection part 57. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle interior with an airbag door portion such as an instrument panel having an airbag door portion that is opened by operation of an airbag device in the event of a vehicle collision.

  As an instrument panel that is an interior product for a vehicle with an airbag door part, a frame body that houses an airbag device is welded to the back surface of the instrument panel main body so as to substantially correspond to a substantially rectangular shooting port inside the frame body. A thin-walled portion to be ruptured is formed in the instrument panel body, the airbag door portion is defined in the instrument panel body by the portion to be ruptured, and a reinforcing flap portion is disposed inside the frame body to be hinged There is known an instrument panel which is connected to the inner peripheral portion of the flange portion via a portion and welded to the back surface of the airbag door portion. In this instrument panel, a gap is formed between the periphery of the flap portion excluding the hinge portion and the frame (see, for example, Patent Document 1).

There is also known an instrument panel of a type in which the front end of the flap portion on the side opposite to the hinge portion of the flap portion is extended and overlapped at the intersection between the peripheral portion in the flange portion and the frame portion (for example, Patent Documents). 2).
JP 2000-71924 A (page 4, FIG. 4) JP-A-7-291078 (page 3, FIG. 1)

  By the way, when the front end of the flap portion is extended as in the above-mentioned Patent Document 2, the front end of the flap portion approaches the planned fracture portion. Therefore, when the flap portion and the flange portion of the frame body are welded to the back surface of the instrument panel body, the flap If the part deviates from the normal position and its tip protrudes outside the part to be broken, the tip of the flap part will be caught around the part to be broken during the operation of the airbag device, hindering the opening operation of the airbag door part. May come.

  The present invention has been made in view of such a point, and an object of the present invention is to improve the positional relationship between the flap portion and the planned fracture portion.

  In order to achieve the above object, the present invention is characterized in that a movement restricting means for the flap portion is provided at the intersection of the inner peripheral portion of the flange portion and the frame portion corresponding to the tip of the flap portion.

  Specifically, the invention described in claim 1 is a frame portion having a substantially rectangular tube shape having a shooting port, and a frame from the periphery of the shooting port so as to be welded to the back surface of the interior product main body and substantially orthogonal to the frame portion. A frame having a flange portion extending outwardly, and a flap portion welded to the back surface of the interior product main body and connected to a peripheral portion in the flange portion on one side thereof via a hinge portion so that the shooting port can be opened and closed; In the event of a vehicle collision, an airbag door portion defined by a thinly-scheduled breakage portion formed in the interior product body so as to substantially correspond to the shooting port and an airbag device disposed in the frame portion are provided. With an airbag door portion configured to break the planned breakage portion by the operation of the airbag device, and the airbag door portion is integrally rotated with the flap portion and rotated around the hinge portion. Intended for dual-use interior parts, was taken to solve the following means.

  That is, in the invention according to claim 1, the flap portion on the side opposite to the hinge portion of the flap portion is extended so as to overlap with the intersection portion of the flange inner peripheral portion and the frame portion. An extension portion that is close to or abuts is provided, and at the intersection, a receiving surface portion that supports the extension portion when a load is applied to the airbag door portion from the surface side, and substantially orthogonal to the receiving surface portion And a shelf portion including a restricting surface portion that is positioned on the shooting port side or immediately below the planned fracture portion with respect to the planned fracture portion on the front end side of the flap portion and restricts movement so as to position the extended portion relative to the planned fracture portion. It is provided.

  According to a second aspect of the present invention, in the first aspect of the invention, the restricting surface portion faces the extended portion from at least the planned fracture portion side and regulates the movement of the extended portion to the planned fracture portion side. It is characterized by.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein at least the planned fracture portion of the intersecting portion is formed by a recess formed on the back surface of the interior product main body, and the corresponding portion of the planned fracture portion is It is separated from the back surface of the interior product main body, and a space is formed at the location.

  According to the first aspect of the present invention, when a load is applied to the airbag door portion from the front surface side, the extension portion at the front end of the flap portion is pressed against the receiving surface portion at the intersection of the flange inner peripheral portion and the frame portion. Since it supports, the planned breakage portion is not broken by an external force, and accidental breakage of the airbag door portion can be prevented. Furthermore, since the extension part at the front end of the flap part is restricted by the restriction surface part, when the flap part and the flange part of the frame body are welded to the back surface of the instrument panel main body, the flap part is displaced from the normal position and its front end However, when the airbag apparatus is activated, the airbag door portion can be smoothly opened without being caught on the outer periphery of the planned fracture portion.

  According to the invention which concerns on Claim 2, the movement to the fracture | rupture planned part side of an extension part (flap part) can be prevented reliably by a control surface part.

  According to the invention which concerns on Claim 3, the burr | flash which generate | occur | produces when welding a flap part and the flange part of a frame to the instrument panel main body back surface is accommodated in space, and it is a molten state in the recessed part which forms a fracture | rupture planned part. It is possible to prevent the air bag door portion from being smoothly opened when the air bag device is activated because the burr enters and the portion to be broken becomes thick.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 5 shows a front part of the passenger seat of the instrument panel 1 as an interior part for a vehicle with an air bag door according to Embodiment 1 of the present invention. 2 is a cross-sectional view taken along line II-II in FIG. The instrument panel 1 is a two-layered interior body composed of a resin base material 3 formed of polypropylene (PP) or the like and a resin skin 5 integrally coated on the surface side of the base material 3. The instrument panel main body 7 is provided.

  On the back surface of the base material 3 of the instrument panel body 7, two opposing sides extend parallel to the vehicle width direction, and the other two opposing sides extend parallel to the vehicle body front-rear direction so as to surround a substantially rectangular shape in plan view. A groove portion 9 is formed as a concave portion, and an instrument panel main body 7 portion corresponding to the groove portion 9 is formed thin to form a breakable portion 11 having a substantially rectangular shape in plan view. And by the area | region enclosed by this fracture | rupture scheduled part 11, the airbag door part 13 which fractures | ruptures and opens the said fracture | rupture planned part 11 by the action | operation of the airbag apparatus 33 mentioned later at the time of a vehicle collision substantially respond | corresponds to the shooting port 19 mentioned later. It is defined as follows. The airbag door portion 13 is configured as a so-called seamless type in which the groove portion 9 that forms the planned fracture portion 11 cannot be identified from the surface side of the instrument panel body 7.

  A resin frame 15 is fixed by vibration welding to the back surface of the airbag door portion 13 and the surrounding instrument panel body 7. The frame body 15 includes a frame portion 17 formed in a substantially rectangular cylindrical shape. The frame portion 17 is arranged to face the front frame wall 17a extending in the vehicle width direction and the rear side of the front frame wall 17a. A rear frame wall 17b extending in the width direction, a left frame wall 17c (appearing in FIG. 4) extending in the vehicle longitudinal direction so as to connect the left edges of the front frame wall 17a and the rear frame wall 17b, and a right edge It comprises a right frame wall 17d extending in the longitudinal direction of the vehicle body so as to connect each other. Further, as shown in FIGS. 3 and 4, a substantially rectangular shooting port 19 for inflating the airbag is formed on the inner side of the opening end which is the upper end of the frame portion 17. A flange portion 21 that extends outward from the peripheral portion of the shooting port 19 so as to be substantially orthogonal to the frame portion 17 is integrally formed.

  A reinforcing resin flap portion 25 is disposed in the shooting port 19 of the frame portion 17. Since the flap portion 25 is opened together with the airbag door portion 13 by the operation of the airbag device 33, the flap portion 25 is formed of a high-toughness resin material that is not easily damaged in a low temperature state. On the other hand, the frame 15 is formed of a resin material containing glass fiber having relatively high rigidity in order to reinforce the instrument panel body 7 around the airbag door portion 13. A hinge portion 27 that is curved in a substantially S shape is integrally formed at the base end of the flap portion 25, and a base portion 27a of the hinge portion 27 is an intersection of the frame portion 17 and the flange portion 21 that is one side of the vehicle body front side. The flap portion 25 is integrally connected to the flange inner peripheral portion on one side thereof via the hinge portion 27 so that the shooting port 19 can be opened and closed. On the surfaces of the flange portion 21 and the flap portion 25, vibration welding projections 31 are integrally projected vertically and horizontally, and the projections 31 are also integrally formed on the base portion 27 a of the hinge portion 27. The flange portion 21, the flap portion 25, and the base portion 27 a of the hinge portion 27 are fixed to the back surface of the instrument panel body 7 by vibration welding, and the frame body 15 is disposed on the back side of the instrument panel body 7.

  An air bag device 33 including an air bag and an inflator for protecting the passenger in the front passenger seat from an impact in the longitudinal direction of the vehicle body is housed in the frame portion 17, and the air bag device 33 includes a plurality of hooks. 35 are fixed at intervals in the vehicle width direction, and these hooks 35 are inserted into a plurality of engaging holes 17e formed at intervals in the vehicle width direction in the frame portion 17, and each hook 35 is engaged when the airbag device is operated. The frame body 15 is prevented from jumping out by being caught on the periphery of each engagement hole 17e.

  A screw member 37 projects downward from the lower end of the airbag device 33, and the screw member 37 is inserted into a through hole 39 a formed on one end side of a metal bracket 39, and a nut 41 is attached to the screw member 37. The bracket 39 is fastened to the lower end of the airbag device 33 by screwing. The other end of the bracket 39 is fixed by welding to a metal instrument panel reinforcement 43 that extends in the vehicle width direction and supports the instrument panel body 7. Thus, the lower end of the airbag device 33 is connected and supported to the instrument panel reinforcement 43 via the bracket 39.

  A stepped portion 45 having a substantially L-shaped cross section is formed at the intersection 29 of the frame portion 17 and the flange portion 21 at a portion where the base portion 27a of the hinge portion 27 is coupled so that the shooting port 19 expands. Thus, a bulging wall 49 having a substantially L-shaped cross section is formed outside the intersecting portion 29. The base portion 27a of the hinge portion 27 is molded and joined integrally with the step portion 45 and is vibration-welded to the back surface of the instrument panel body 7 and fixed. Accordingly, the hinge portion 27 and the planned fracture portion 11 approach the inner wall of the frame 15 by the width of the stepped portion 45, and the distance between the vibration welding projection 31 of the hinge portion 27 and the planned fracture portion 11 is reduced. When the bag device 33 is operated, the instrument panel body 7 around the base portion 27a of the hinge portion 27 is not greatly bent so that the bulging pressure of the airbag is concentrated on the expected breakage portion 11 so that the expected breakage portion 11 becomes normal. It can break in the state.

  The procedure for integrally molding the base portion 27a of the hinge portion 27 to the step portion 45 is to first mold the frame body 15 having the frame portion 17 and the flange portion 21 in advance, and then mold the frame body 15 with a mold. This is performed by so-called double injection molding (two-color molding), in which the frame portion 17 is integrally molded so that the flap portion 25 is slightly expanded as shown in FIG. At this time, the base portion 27 a of the hinge portion 27 is integrally molded and coupled to the step portion 45. If the anchor portion 51 having a substantially T-shaped cross section is integrally formed along the longitudinal direction of the hinge portion 27 on the vertical wall of the stepped portion 45 as indicated by a virtual line in FIG. The step 45 is firmly connected.

  At the tip of the flap portion 25 on the side opposite to the hinge portion of the flap portion 25, as a feature of the present invention, as shown in an enlarged detail in FIG. 1, an extended portion comprising a lower surface portion 53 a, an outer surface portion 53 b and an inner surface portion 53 c. 53 extends so as to overlap with an intersection 57 between the inner peripheral portion of the flange portion 21 and the frame portion 17 and is suspended at a substantially right angle. On the other hand, the intersecting portion 57 bulges outside the frame portion 17, and a shelf portion 55 having an L-shaped cross section is formed inside the bulged portion of the frame portion 17. The shelf portion 55 is substantially orthogonal to the receiving surface portion 55a that supports the extending portion 53 when a load is applied to the airbag door portion 13 from the front surface side, and the end portion of the receiving surface portion 55a on the breakable portion 11 side. The regulation surface portion 55b is positioned immediately below the planned fracture portion 11 (groove portion 9) on the front end side of the flap portion 25, and the planned fracture portion 11 is formed on the outer surface portion 53b of the extension portion 53. Faced from the side, the movement of the extended portion 53 is restricted so as to be positioned with respect to the planned fracture portion 11. In a state where the extending portion 53 is made to correspond to the shelf portion 55, the lower surface portion 53a of the extending portion 53 is close to the receiving surface portion 55a, and the outer surface portion 53b is close to the regulating surface portion 55b. Moreover, the said flap part 25 has the clearance gap C between the vehicle width direction both sides of the said frame part 17, and has covered the said shooting port 19 (refer FIG. 3).

  The flap portion 25 configured as described above is vibration welded to the back surface of the instrument panel body 7 together with the frame body 15 as follows. First, the frame 15 and the flap portion 25 integrated as described above are arranged around the hinge portion 27 so that the flap portion 25 closes the shooting port 19 and are arranged on the back surface of the instrument panel body 7. Are clamped by a jig (not shown). At this time, the movement of the outer surface portion 53 b of the extension portion 53 of the flap portion 25 to the flange portion 21 side is restricted by the restriction surface portion 55 b of the shelf portion 55. Thereafter, the instrument panel body 7 and the frame body 15 are relatively vibrated, and the frame body 15 is vibration welded to the back surface of the instrument panel body 7.

  In the instrument panel 1 configured as described above, when the vehicle collides, the airbag of the airbag device 33 is inflated by the operation of the inflator, and the airbag door portion 13 and the flap portion 25 are pressed upward by the inflation pressure. As a result, the hinge portion 27 extends in a straight line state and the airbag door portion 13 projects upward together with the flap portion 25 as shown in phantom lines in FIG. However, the hinge portion 27 in the linear state is rotated about the opening operation fulcrum and is opened upward in the front of the vehicle body.

  Thus, in Embodiment 1, since the extension part 53 provided in the front-end | tip of the flap part 25 is supported by the receiving surface part 55a of the shelf part 55, the load is applied to the airbag door part 13 from the surface side. In addition, it is possible to prevent the airbag door portion 13 from being accidentally damaged by preventing the planned breaking portion 11 from being broken. Further, the extension portion 53 at the tip of the flap portion 25 is prevented from moving toward the planned fracture portion 11 (groove portion 9) side by the restriction surface portion 55b, so that the flap portion 25 and the flange portion 21 of the frame body 15 are connected to the instrument panel. When welding to the back surface of the main body 7, the position of the flap portion 25 is prevented from being displaced, and the tip of the flap portion 25 is prevented from being caught on the instrument panel main body 7 around the planned fracture portion 11 when the airbag device 33 is operated. The airbag door part 13 can be opened smoothly.

<Modification 1>
FIG. 6 is a view corresponding to FIG. In the first modification, the shelf portion 55 is formed in a U-shaped cross section, and is provided on both end portions of the receiving surface portion 55a with the restricting surface portions 55b and 55c, and the outer surface portion 53b and the inner surface portion 53c of the extending portion 53 of the flap portion 25. The regulation surface portions 55b and 55c are faced from both sides of the planned breakage portion 11 side and the anti-breakage portion 11 side to position the flap portion 25 in both the inside and outside directions, and a load is applied to the airbag door portion 13 from the surface side. The extended portion 53 of the flap portion 25 is prevented from being detached from the shelf portion 55 when hooked. The other parts are the same as those in the first embodiment, and thus the same portions are denoted by the same reference numerals and the description thereof is omitted.

<Modification 2>
FIG. 7 is a view corresponding to FIG. In the second modified example, the extending portion 53 is formed inward from the tip of the flap portion 25, and the intersecting portion 57 bulges inside the frame portion 17, and the shelf portion 55 is formed at the bulging portion. The modified example 1 is different from the modified example 1 in that the point corresponding to the planned fracture portion 11 of the intersecting part 57 is separated from the back surface of the instrument panel body 7 and a space S is formed in the part. It is the same. According to this, the burr generated when the flap portion 25 and the flange portion 21 of the frame 15 are welded to the back surface of the instrument panel main body 7 is accommodated in the space S, and the groove portion 9 forming the planned fracture portion 11 is accommodated. It is possible to prevent the melted burr from entering and the planned fracture portion 11 to become thick and prevent the airbag door portion 13 from being smoothly opened when the airbag device 33 is operated.

<Modification 3>
FIG. 8 is a view corresponding to FIG. This modified example 3 is the same as modified example 2 except that the shelf 55 has an L-shaped cross section and there is no regulating surface 55c facing from the anti-breaking portion 11 side.

<Modification 4>
FIG. 9 is a view corresponding to FIG. This modification 4 is the same as the modification 2 except that the bulging portion of the intersecting portion 57 is formed outside the frame body 15.

<Modification 5>
FIG. 10 is a view corresponding to FIG. This modified example 5 is the same as the modified example 4 except that the shelf 55 has an L-shaped cross section and there is no restriction surface 55c that faces the anti-breaking portion 11 side.

<Modification 6>
FIG. 11 is a view corresponding to FIG. In this modified example 6, the extended portion 53 is formed inward from the tip of the flap portion 25, and the portion corresponding to the planned fracture portion 11 of the intersecting portion 57 is separated from the back surface of the instrument panel body 7 and is spaced in the portion. Although the point where S is formed is the same as that of the modified examples 2 to 5, the point that the regulation surface portion 55b of the shelf 55 is formed by the inner wall of the frame portion 17 is different from the modified examples 2 to 5.

<Modification 7>
FIG. 12 is a view corresponding to FIG. In the modified example 7, unlike the extended portion 25 that extends vertically at a substantially right angle in the first embodiment, the extended portion 53 of the flap portion 25 extends straight. Others are the same as in the first embodiment.

(Embodiment 2)
FIG. 13 shows an instrument panel 1 according to the second embodiment. The instrument panel 1 is the same as that of the first embodiment except that the structure of the frame 15 and the shape of the hinge portion 27 are different. That is, the frame 15 is formed by assembling the bottomed metal frame portion 17 and the resin flange portion 21. To explain the assembly structure, a plurality of bolt insertion holes 21 b are formed through the flange portion 21 along the periphery of the shooting port 19, while an overhang portion 17 f is formed integrally with the upper end edge of the frame portion 17. In addition, a plurality of bolt insertion holes 17g are formed through the overhanging portion 17f so as to correspond to the bolt insertion holes 21b. Then, the bolt 81 is inserted into the bolt insertion holes 21b and 17g from the flange portion 21 side in a state where the overhanging portions 17f of the frame portion 17 are overlapped on the flange portion 21 and the respective bolt insertion holes 21b and 17g are aligned. The frame portion 17 and the flange portion 21 are coupled by screwing and fastening a nut 83 to the shaft portion of the bolt 81 projecting toward the overhang portion 17f. Moreover, the hinge part 27 is a thing integrated with the flange part 21 in the shape curved in the substantially U shape. The rest of the configuration is the same as that of the first embodiment, and thus the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  Therefore, the second embodiment can achieve the same effects as the first embodiment.

  In addition, in each said embodiment and each modification, although the extension part 53 was made to adjoin to the receiving surface part 55a and the regulation surface part 55b of the shelf part 55, you may make it contact | abut.

  Moreover, in each said embodiment and each modification, although the fracture | rupture planned part 11 was formed by the groove part 9 formed in the back surface of the instrument panel main body 7, it fractures | ruptures by making many acicular holes closely and making it concave. The planned portion 11 may be formed.

  Further, in each of the above-described embodiments and modifications, the flange portion 21 and the flap portion 25 are vibration welded to the back surface of the instrument panel body 7. However, as an alternative means of vibration welding, there are other methods such as ultrasonic welding and heat caulking welding. It may be a welding means.

  Moreover, in each said embodiment and each modification, although the airbag door part 13 was formed integrally with the instrument panel main body 7, an opening part was formed in the instrument panel main body 7, and an instrument panel is formed in this opening part. A panel material as another member constituting a part of the main body 7 may be fitted, and the frame body 15 including the flap portion 25 may be fixed to the back surface of the panel material.

  Furthermore, in each of the above-described embodiments and modifications, the instrument panel body 7 has a form in which the surface 5 is coated on the surface side of the base material 3, but this skin 5 is omitted and only the base material 3 is present. May be.

  In addition, although the case where the interior product is the instrument panel 1 with an airbag door portion is shown, a steering handle with an airbag door portion may be used.

  The present invention can be applied to an interior product that needs to protect an occupant when a vehicle collides, such as a vehicle instrument panel or a steering handle.

It is the A section enlarged view of FIG. It is sectional drawing in the II-II line of FIG. 3 is a plan view of a frame body in Embodiment 1. FIG. 3 is a perspective view of a frame body in Embodiment 1. FIG. FIG. 3 is a perspective view of a front part of the passenger seat of the instrument panel according to the first embodiment. FIG. 9 is a view corresponding to FIG. FIG. 10 is a view corresponding to FIG. FIG. 10 is a view corresponding to FIG. FIG. 10 is a view corresponding to FIG. FIG. 10 is a view corresponding to FIG. FIG. 10 is a view corresponding to FIG. FIG. 10 is a view corresponding to FIG. FIG. 3 is a diagram corresponding to FIG. 2 of the second embodiment.

Explanation of symbols

1 Instrument panel (interior)
7 Instrument panel body (interior product body)
9 Groove (recess)
DESCRIPTION OF SYMBOLS 11 Breaking part 13 Airbag door part 15 Frame 17 Frame part 19 Shooting port 21 Flange part 25 Flap part 27 Hinge part 33 Airbag apparatus 53 Extension part 55 Shelf part 55a Receiving surface part 55b Control surface part 57 Intersection S Space

Claims (3)

A substantially rectangular cylindrical frame portion having a shooting port, a flange portion welded to the back surface of the interior product body and extending outward from the periphery of the shooting port so as to be substantially orthogonal to the frame portion, and a back surface of the interior product body A frame body having a flap portion that is welded to the inner peripheral portion of the flange portion on one side thereof so as to be capable of opening and closing the shooting port;
An airbag door part defined by a thinly-scheduled breaking part formed on the interior product body so as to substantially correspond to the shooting port;
An airbag device disposed in the frame,
An airbag door portion configured to break the planned breakage portion by the operation of the airbag device at the time of a vehicle collision so that the airbag door portion is pivotally opened around the hinge portion integrally with the flap portion. Vehicle interior parts,
At the tip of the flap portion on the side opposite to the hinge portion of the flap portion, there is provided an extension portion that extends so as to overlap with the intersection portion between the flange inner peripheral portion and the frame portion and is close to or in contact with the intersection portion. ,
The crossing portion includes a receiving surface portion that supports the extending portion when a load is applied to the airbag door portion from the front surface side, and a portion to be ruptured that extends from the receiving surface portion so as to be substantially orthogonal to the front end side of the flap portion. An air bag door characterized in that a shelf portion is provided which includes a restricting surface portion which is positioned closer to the shooting port or directly below the planned breakage portion and which restricts movement so as to position the extended portion with respect to the breakable portion. Interior parts for vehicles with parts. In the vehicle interior with an airbag door part according to claim 1,
The restricting surface portion faces the extended portion from at least the planned fracture portion side and restricts movement of the extended portion to the planned fracture portion side. In the vehicle interior with an airbag door part according to claim 1 or 2,
At least the planned fracture portion of the intersection is formed by a recess formed on the back surface of the interior product main body, and the portion corresponding to the planned fracture portion is separated from the back surface of the interior product body, and a space is formed at the location. An interior product for vehicles with an air bag door.

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