JP4629499B2 - Interior parts for vehicles with airbag doors - Google Patents

Description

  The present invention relates to a vehicle interior with an airbag door portion that is deployed at the time of a vehicle collision.

  Conventionally, an airbag door portion that is deployed on an interior product body by the operation of an airbag device is partitioned and formed at a portion to be broken, and a flange portion of a frame is welded to the outer periphery of the airbag door portion on the back surface of the interior product body. In addition, the airbag device is accommodated in the frame body, and the frame door is provided with a flap portion in which the frame body and the base end side are integrally connected by a hinge portion and the upper surface is welded to the back surface of the airbag door portion. An interior product for a vehicle with a vehicle is known (see, for example, Patent Document 1).

  In this vehicle interior product with an airbag door part, a gap is provided between the flange part and the flap part on the side opposite to the hinge part of the flap part, and in this part, only the part to be broken of the interior product body exists. is doing. For this reason, there is a problem that the planned fracture portion is easily broken, and when a load is applied from the surface side of the interior product main body, the planned fracture portion is broken and the interior product main body is depressed inward.

Therefore, for example, in the interior product for a vehicle with an airbag door portion of Patent Document 2, when the front end portion of the flap portion is developed to the surface side at the time of molding and is welded to the interior product body, the hinge of the flap portion is The gap provided between the tip portion opposite to the tip portion and the shooting port opening edge corresponding to the tip portion is reduced. This increases the rigidity of the airbag door.
JP 2000-71924 A JP 2004-196279 A

  However, in a conventional vehicle interior product with an airbag door portion, the tip of the flap portion is not completely placed on the frame (shooting port opening edge), so the load from the surface side of the interior product body is sufficient. The problem that the internal part main body is depressed toward the inside due to the failure to be supported and the planned fracture part to break has not been solved.

  The present invention has been made in view of the above points, and the object of the present invention is to reliably support the load from the surface side of the interior product body, the planned fracture portion is broken, and the interior product body is directed inward. It is to prevent the sinking.

  In order to achieve the above object, according to the present invention, an extending member placed on the frame side shelf recessed in the frame is provided in the flap portion.

  Specifically, according to the first aspect of the present invention, there is provided an interior part main body in which an airbag door part that is deployed by the operation of the airbag device is partitioned and formed at a part to be broken, and the airbag door part on the back surface of the interior part body A frame body having a flange portion welded to the outer periphery and housing the airbag device, and a frame body and a base end side are integrally connected by a hinge portion, and an upper surface is welded to the back surface of the airbag door portion. It is intended for interior parts for vehicles with airbag doors equipped with a flap part.

Then, the air bag door portion with a vehicle interior trim has one end rests on the flap side ledge is recessed into the distal end of the flap portion and the other end that the mounting on the frame side ledge is recessed into the frame Having an extension member,
The welding projection protruding from the flap side shelf penetrates the through hole provided in the extending member, and is welded to the airbag door at the same time when the flange and the flap are welded to the interior body. the Rukoto, the extending member is Ru is connected to the flap portion.

In the second invention, the hinge part and the flap part continuous to the hinge part are made of a flexible resin material, and the extending member is made of a rigid resin material harder than the flexible resin material. To do.

According to the first aspect of the vehicle interior product with an airbag door portion described above , one end of the extending member is placed on the flap side shelf so that the welding projection penetrates, and the other end is recessed in the frame body side. The extending member is welded to the airbag door portion simultaneously with the flange portion and the flap portion. For this reason, when a load is applied from the outside of the interior product main body, the planned fracture portion is supported by the frame body via the extending member, so that the planned fracture portion can be prevented from being broken. Moreover, since an extending member can be easily connected to a flap part, a work process reduces and manufacturing cost can be reduced.

According to the second aspect, the extending member is made of a rigid resin material that is harder than the hinge portion and the flap portion. For this reason, since the inflation pressure of the airbag concentrates on the extension member that is harder than the flap when the airbag is inflated, the planned breakage portion on the upper side of the extension member is easily broken, and the airbag door portion is securely attached. Can be deployed.

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

  FIG. 1 partially shows a panel body 1 (interior part body) of an instrument panel (interior part with an airbag door) A arranged in the front part of a vehicle compartment. The panel body 1 includes an airbag door 5 having a rectangular door portion 17 (airbag door portion) at a portion corresponding to the front of the passenger seat next to the driver's seat. The door portion 17 is defined by a planned breaking portion 7 that is broken when the airbag (not shown) of the airbag device 42 shown in FIG. 2 is deployed. The door portion 17 is a so-called seamless type in which the planned fracture portion 7 cannot be identified from the front side of the panel body 1. The airbag device 42 protects the passenger in the passenger seat against an impact from the longitudinal direction of the vehicle body.

  As shown by a two-dot chain line in FIG. 2, the panel body 1 is composed of a relatively hard resin base material 10 formed by injection molding polypropylene filler hard resin (PPF) or the like.

  On the back surface of the substrate 10, for example, a groove portion 15 having a substantially V-shaped cross section that is recessed toward the front surface side is formed so as to form each rectangular side of the door portion 17. That is, the panel body 1 has a portion where the groove portion 15 is provided as a weakened weaker portion than the other portions, and the thin weakened portion serves as the planned fracture portion 7. The planned break portion 7 forms an outer edge of a rectangular door portion 17 that opens toward the rear side of the vehicle.

  A resin molded body 13 is disposed on the back side of the panel main body 1. In the present embodiment, the airbag door 5 is a combination of a part of the panel body 1 (the door portion 17 opened by the deployment of the airbag and the peripheral portion of the door portion 17) and the resin molded body 13. pointing.

  The resin molded body 13 extends along the door portion 17, a reinforcing flap portion 20 integrally coupled to the back surface of the door portion 17, and a frame body 22 in which an airbag device 42 is disposed. And a hinge portion 24 for connecting the flap portion 20 and the frame body 22 to each other. The flap portion 20, the frame body 22, and the hinge portion 24 are integrally formed by injection molding using a flexible resin material made of a polyolefin-based soft resin (TPO) softer than the base material 10.

  The frame body 22 corresponds to the door portion 17 and extends in a direction away from the panel body 1, and the frame body 23 has an opening end on the panel body 1 side to the back surface of the base material 10. And a flange portion 26 that spreads outside the door portion 17. The frame body 23 is formed in a cylindrical shape having a rectangular cross section. A plurality of elongated holes 32 penetrating in the plate thickness direction are formed in an intermediate portion of the hinge side portion 23a integrally joined with the hinge portion 24 and an intermediate portion of the anti-hinge side portion 23b facing the hinge side portion 23a. Each is formed.

  As shown in FIG. 3, the flange portion 26 is disposed outside the door portion 17, that is, outside the planned fracture portion 7, and at least anti-hinge free connected to the anti-hinge side portion 23 b of the frame body 23. An end flange portion 26 a and a base end flange portion 26 b connected to the hinge side portion 23 a of the frame body 23 are provided, and are welded to the back surface of the base material 10 outside the planned fracture portion 7. 3 indicates a position where the planned fracture portion 7 of the base material 10 overlaps.

  The anti-hinge free end flange portion 26 a is integrally formed on the outside of the frame body 23, and extends on the extension line of the flap portion 20 along the base material 10 toward the outside of the door portion 17.

  On the other hand, the base end side flange portion 26b is formed integrally with the end portion on the panel main body 1 side of the hinge side portion 23a of the frame main body 23, and extends on the extension line of the flap portion 20 along the base material 10. The hinge free end side flange portion 26a extends to the opposite side.

  The flange portion 26 includes a side free end flange portion 26c that extends from the pair of side edges extending in the vehicle body front-rear direction in the frame main body 23 to the left and right outer sides along the back surface of the base material 10, and this side portion free portion. The end flange portion 26c is integrally formed with the anti-hinge free end flange portion 26a and the proximal end flange portion 26b, thereby forming a rectangular frame shape in plan view.

  The flap portion 20 is formed in a plate-like body having a rectangular shape in plan view along the back surface of the base material 10 and having a size substantially corresponding to the shape of the door portion 17. The base end portion 20 a on one side of the flap portion 20 is integrally connected to the frame body 22 via the hinge portion 24, and the other three sides are anti-hinges as free ends separated from the frame body 22. A free end 20b and both side free ends 20c are formed.

  As shown in FIG. 2, the hinge portion 24 extends to a central portion of the side of the rectangular door portion 17 on the front side of the vehicle body, and is continuous with the hinge side portion 23a of the frame body 23 on the opposite side to the proximal end flange portion 26b. It protrudes to the opposite side of the panel body 1. Thus, the hinge portion 24 integrally connects the base end portion 20a of the flap portion 20 and the end portion on the panel body 1 side of the hinge side portion 23a of the frame body 23.

  The groove portion 15 on the hinge portion 24 side forming the planned fracture portion 7 is provided at a portion corresponding to the connecting portion between the hinge portion 24 and the hinge side portion 23a of the frame body 23 in the base material 10 of the panel body 1. . On the other hand, the flap portion 15 on the free end side of the flap portion that forms the planned break portion 7 is disposed outside the free end portions 20 b and 20 c of the flap portion 20.

  A plurality of welding protrusions 40 arranged at predetermined intervals are provided on the front side surfaces of the flap portion 20 and the flange portion 26.

  The airbag device 42 is disposed inside the frame body 22. The airbag device 42 includes an airbag case 43 that houses the airbag and an inflator (not shown). A hook-shaped attachment 45 is fixed to the airbag case 43, and the airbag case 43 is engaged with the long hole 32 of the frame body 23 via the attachment 45. The airbag is stored in a folded state in an airbag case 43. The inflator generates gas when a vehicle collision is detected, and the airbag is inflated and deployed by the gas. Yes.

  And the frame side shelf part 50 is recessed in the substantially rectangular shape inside the anti-hinge side part 23b upper end of the said frame main body 23. As shown in FIG. On the other hand, a flap side shelf 51 is recessed at the tip of the flap portion 20 so as to correspond to the frame side shelf 50. A long and thin rectangular plate-like extending member 52 is provided so as to straddle the frame-side shelf 50 and the flap-side shelf 51. The extending member 52 has a rectangular plate shape made of a rigid resin material such as polypropylene filler hard resin (PPF) that is harder than the flexible resin material constituting the flap portion 20. The anti-hinge side tip is disposed so as to be inside the groove 15. As shown in FIG. 4, a gap is left between the anti-hinge free end portion 20 c of the flap portion 20 and the frame body 23 in a portion where the extending member 52 is not provided.

  A plurality of through holes 53 are formed in the extending member 52. The flap-side shelf 51 is provided with the same number of welding projections 54 so as to correspond to the through hole 53. In addition, the welding protrusion 40 is provided on the extending member 52 in the same manner as the welding protrusion 40 of the flap portion 20.

  In order to weld the resin molded body 13 configured as described above to the base material 10, first, the hinge of the extending member 52 is set so that the welding protrusion 54 penetrates the through hole 53 provided in the extending member 52. The end on the side of the part 24 is placed on the flap side shelf 51.

  In this state, the welding protrusion 40 of the extending member 52 and the tip of the welding protrusion 54 are vibrated on the back surface of the base material 10 substantially simultaneously with the welding protrusion 40 on the front surface of the flap portion 20 and the flange portion 26. Weld.

  Thus, the extension member 52 is welded to the door portion 17 at the same time when the flange portion 26 and the flap portion 20 are welded to the base material 10. In this way, the flap portion 20, the flange portion 26, and the extending member 52 are coupled to the base material 10, and the extending member 52 is connected to the flap portion 20.

  Therefore, in the instrument panel A, the airbag device 42 is actuated by an impact such as a vehicle collision, the airbag is inflated, and the flap portion 20 and the extending member 52 are pushed up by the pressure, and the portion to be broken 7 is broken, and the door portion 17 is integrated with the flap portion 20 forward with the hinge portion 24 as the center.

  On the other hand, at the normal time, the extending member 52 of the flap portion 20 is in contact with the frame-side shelf portion 50 to support the pressing force from above.

-Effect of the embodiment-
Therefore, according to the instrument panel A of the present embodiment, by providing the extending member 52 that is placed on the frame side shelf 50 and welded to the back surface of the door portion 17 on the flap portion 20, the outside of the base material 10 is provided. When a load is applied, the planned fracture portion 7 is supported by the frame body 22 via the extending member 52, so that the planned fracture portion 7 can be prevented from being broken.

  In addition, since the extending member 52 is made of a rigid resin material that is harder than the hinge portion 24 and the flap portion 20, the inflation pressure of the airbag is applied to the extending member 52 that is harder than the flap portion 20 when the airbag is inflated. Since it concentrates, the fracture | rupture planned part 7 above the extending member 52 is easily fractured, and the door part 17 can be reliably deployed.

  Further, one end of the extending member 52 is placed on the flap side shelf 51 so that the welding projection 54 penetrates, and the extending member 52 is welded to the door portion 17 simultaneously with the flange portion 26 and the flap portion 20. For this reason, since the extending member 52 can be easily connected to the flap part 20, a work process reduces and manufacturing cost can be reduced.

-Modification of the embodiment-
Next, a modification of this embodiment will be described. As shown in FIG. 5, the rectangular plate-like extending member 52 of this modification is arranged so that its longitudinal direction is substantially perpendicular to the hinge portion 24. That is, the frame side shelf 50 of this modification is shorter than the above embodiment. Moreover, the flap side shelf 51 of the present modification is longer in the direction perpendicular to the hinge portion 24 than in the above embodiment.

Also in this modification, as shown in FIG. 6, the extension member 52 is welded to the base material 10 at the same time when the flange portion 26 and the flap portion 20 are welded to the base material 10 as in the above embodiment.

  Therefore, according to the instrument panel A of the present modification, the extension member 52 that is harder than the flap portion 20 is provided in the flap portion 20 perpendicular to the flange portion 26. Since the pressure easily collects in the extending member 52 and pushes up the base material 10 at the tip portion thereof, the force at the time of bulging is further concentrated as compared with the above-described embodiment, and the breakable portion 7 is easily broken.

(Other embodiments)
The present invention may be configured as follows for each of the above embodiments.

  That is, in each said embodiment, although the panel main body 1 shall consist of the base material 10 of one layer, it is good also as a thing of two or more layers by which the skin material was provided in the surface side of this base material 10. FIG.

  Furthermore, the airbag device 42 is a front airbag device disposed in front of the passenger seat on the side of the driver's seat, and the airbag device 42 protects the occupant from an impact from the vehicle front-rear direction. It can also be applied to the steering wheel pad to protect the driver. In addition, the present invention can also be applied to the case where an air bag device is installed in a vehicle interior such as a center pillar garnish.

  As described above, the present invention is useful for vehicle interior parts with an airbag door portion such as an instrument panel having an airbag door portion that is deployed at the time of a vehicle collision.

It is the perspective view which showed a part of instrument panel which concerns on this embodiment. It is the II-II sectional view taken on the line of FIG. It is a top view of a resin molding. It is the IV-IV sectional view taken on the line of FIG. FIG. 4 is a view corresponding to FIG. 3 according to a modification of the embodiment of the present invention. FIG. 5 is a view corresponding to FIG. 4 according to a modification of the embodiment of the present invention.

A Instrument panel (vehicle interior with airbag door)
1 Panel body (interior product body)
5 Airbag door 7 Expected break 10 Base material 17 Door (airbag door)
DESCRIPTION OF SYMBOLS 20 Flap part 22 Frame body 23 Frame main body 24 Hinge part 26 Flange part 42 Airbag apparatus 50 Frame side shelf part 51 Flap side shelf part 52 Extension member 53 Through-hole 54 Welding protrusion

Claims (2)

An interior part main body in which an airbag door portion that is deployed by the operation of the airbag device is partitioned at a portion to be broken,
A frame body having the flange portion welded to the outer periphery of the airbag door portion on the back surface of the interior body, and storing the airbag device;
The frame body and the base end side are integrally connected with a hinge part, and the upper surface is a vehicle interior part with an airbag door part provided with a flap part welded to the back surface of the airbag door part,
One end rests on the flap side ledge is recessed into the distal end of the flap portion, and the other end has an extending member that the mounting to the frame body side ledge is recessed into the frame,
The welding projection protruding from the flap side shelf penetrates the through hole provided in the extending member, and is welded to the airbag door at the same time when the flange and the flap are welded to the interior body. the Rukoto, air bag door portion with a vehicle interior trim in which the extension member is characterized Rukoto connected to the flap portion. In the vehicle interior with an airbag door part according to claim 1,
The airbag part characterized in that the hinge part and the flap part continuous to the hinge part are made of a flexible resin material, and the extending member is made of a rigid resin material harder than the flexible resin material. Interior parts for vehicles with parts.

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