JP4832052B2 - Interior parts for vehicles with airbag doors - Google Patents

Description

  The present invention relates to an improvement of a vehicle interior with an airbag door portion, and more particularly to measures for strengthening an airbag chute.

  Conventionally, there is an airbag door portion provided with an instrument panel body in which an airbag door portion that is opened by the operation of the airbag device is defined by a portion to be broken, and an airbag chute provided on the back surface of the instrument panel body An instrument panel is known (for example, see Patent Document 1).

The airbag chute is a cylindrical frame integrally provided on the back surface of the instrument panel body, and is disposed in the frame body at a distance from the back surface of the instrument panel body, and the airbag device is housed inside the frame. An air bag case.
JP 2004-299509 A (paragraph 0020 column, 0026 column, FIG. 2)

  In general, in an instrument panel with an airbag door portion as in the above-mentioned Patent Document 1, the inflation pressure of the deployed airbag acts greatly on the airbag door portion, and also on the upper end portion of the frame body of the airbag chute. Therefore, it is necessary to secure the strength of the frame body in order to open the airbag door portion stably. By the way, in order to reduce the inflation pressure of the airbag acting on the frame body, the upper end portion of the airbag case is extended to the back side of the instrument panel body, and the distance between the upper end portion of the airbag case and the back surface of the airbag door portion is increased. Although it is conceivable to shrink, when this is done, when the airbag case is assembled to the frame, the upper end of the extended airbag case hits the back surface of the airbag door, making it difficult to assemble, and the head impact at the time of a vehicle collision On the other hand, there is a possibility that the airbag door portion is supported by hitting the upper end portion of the airbag case and the rigidity becomes too high, which is not an appropriate measure.

  The present invention has been made in view of such a point, and an object of the present invention is to increase the strength without changing the structure of the airbag chute itself, and to provide an airbag door portion that opens stably. It is to provide vehicle interior parts such as instrument panels.

  In order to achieve the above object, the present invention is characterized in that the upper end portion of the airbag chute, which is easily subjected to the inflation pressure of the deployed airbag, is reinforced using another member.

  Specifically, the present invention is an interior product body in which an airbag door portion that is opened by the operation of an airbag device is defined by a portion to be broken, and is integrated with the back surface of the interior product body corresponding to the airbag door portion. And a cylindrical airbag chute in which the airbag device is housed. The airbag door is opened by the operation of the airbag device in the event of a vehicle collision. The following solutions were taken for the vehicle interior parts with airbag doors.

That is, according to the first aspect of the present invention, the airbag chute includes a tubular frame body, and an upper end portion is disposed in the frame body at a distance from the back surface of the interior article main body. an airbag case but housed, extends outward from the upper edge of the frame member and a flange portion which is welded to the back surface the interior article body, the upper end outer periphery of the air bag chute, the air A bottom wall portion integrally fixed to the flange portion of the bag chute, and protrudes from one end of the bottom wall portion to the back side of the interior product body, and corresponds at least between the back surface of the interior product body and the upper end of the airbag case reinforcing member having an inner wall portion which is arranged close to the frame upper end outer periphery of the air bag chute is characterized in that it is eclipsed set so as to surround the air bag chute with.

The invention described in 請 Motomeko 2 is the invention according to claim 1, upper Symbol reinforcing member, outer wall portion opposed to the inner wall portion projecting interior article body rear side from the other end of the bottom wall portion the provided, and, the bottom wall is formed in a substantially U shape on the inside wall and an outer wall portion, the upper Kisotogawa wall portion projecting end a plurality of first protruding tab portion extending outward At the outer end of the flange portion of the airbag chute, a second overhanging piece portion that is fastened to the first overhanging piece portion along the outer wall portion and the first overhanging piece portion is the interior body. It is formed in the position spaced apart from the back surface .

  According to the first aspect of the present invention, since the outer periphery of the upper end of the airbag chute is reinforced by the annular reinforcing member, the inflation pressure of the airbag deployed by the operation of the airbag device at the time of a vehicle collision is the airbag. Even if it acts on the chute, the airbag chute is not damaged, and the airbag door can be stably opened.

Further, the invention according to claim 1, since the reinforced upper region by the reinforcing member from the air bag case upper portion of the frame, interior parts to extend the air bag case upper portion interior article body back side There is no need to make it closer to the back of the main body than necessary, and an appropriate distance can be secured between them, and when the air bag case is assembled to the frame, the upper end of the air bag case does not hit the back of the interior product body. The assembly operation of the bag case can be easily performed. Further, the airbag door portion does not hit and support the upper end of the airbag case against the head impact at the time of a vehicle collision, and the airbag door portion can be easily deformed to absorb the head impact.

According to the second aspect of the present invention, among the reinforcing members having a substantially U-shaped cross section, the bottom wall portion is along the flange portion of the airbag chute and the inner wall portion is along the upper end portion of the airbag chute. Since the upper end part is reinforced, the reinforcement strength of the said part can be raised. Further, since the reinforcing member and the airbag chute are fastened by the first projecting piece portion and the second projecting piece portion that are separated from the flange portion, which is a welding location, to the back surface side of the interior product body, When the welding is performed on the back surface of the product body, the fastening portion does not get in the way, and the airbag chute can be easily welded to the back surface of the interior product body.

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

(Embodiment)
FIG. 1 shows an instrument panel 1 as an interior part for a vehicle with an airbag door according to an embodiment of the present invention. 2 is a cross-sectional view taken along line AA in FIG. The instrument panel 1 includes an instrument panel body 3 as a resin interior body molded from polypropylene (PP) or the like.

  The instrument panel main body 3 is formed with a groove portion 5 surrounding the driver seat beside the front passenger seat in a rectangular shape in plan view, and the instrument panel main body 3 portion corresponding to the groove portion 5 is the other portion. It is formed to be thinner than the planned fracture portion 7 having a substantially rectangular shape in plan view. And by the area | region enclosed by this fracture | rupture scheduled part 7, the airbag door part 9 which fractures | ruptures and opens the said fracture | rupture planned part 7 by the action | operation of the airbag apparatus 19 mentioned later at the time of a vehicle collision is divided by the instrument panel main body 3. Yes. This airbag door portion 9 is a so-called seamless type in which the planned break portion 7 cannot be identified from the surface side of the instrument panel body 3.

  A cylindrical resin air bag chute 11 is vibration welded to the back surface of the instrument panel main body 3 so as to correspond to the air bag door portion 9. As shown in FIG. 3, the airbag chute 11 includes a cylindrical frame 15 having a shooting port 13 having a substantially rectangular shape in plan view, and an outer edge of the shooting port 13 is provided at the upper edge of the frame 15. A flange portion 25 extending in the direction is integrally formed. On the surface of the flange portion 25, welding ribs 27 extending vertically and horizontally in the vehicle width direction and the vehicle body front-rear direction are integrally projected, and these flanges are vibration welded to the back surface of the instrument panel body 3, thereby A frame body 15 is integrally provided on the back surface of the instrument panel main body 3 via the portion 25. The frame 15 includes a front frame wall 15a that extends in the vehicle width direction, a rear frame wall 15b that is opposed to the rear side of the front frame wall 15a and extends in the vehicle width direction, and the front frame wall 15a and the rear side. It consists of a side frame wall 15c extending in the longitudinal direction of the vehicle body so as to connect the left and right edges of the frame wall 15b. Further, a plurality of ribs 15d extending in the vertical direction are formed on the rear frame wall 15b with a gap in the vehicle width direction.

  As shown in FIG. 3, a reinforcing flap portion 21 is integrally connected to the upper edge of the front frame wall 15a of the frame body 15 via a hinge portion 23 curved in a substantially S shape. The part 21 covers the shooting port 13. Also on the surface of the flap portion 21, welding ribs 27 extending vertically and horizontally in the vehicle width direction and the vehicle body front-rear direction are integrally projected, and these welding ribs 27 are vibration welded to the back surface of the airbag door portion 9, thereby the flap portion. 21 is integrally provided on the back surface of the airbag door portion 9.

  The frame body 15 is made of a rigid material, while the flap portion 21 is made of a flexible material, and these are integrally molded by so-called double injection molding.

  An air bag case 29 is disposed in the frame 15 at a distance from the back surface of the instrument panel main body 3, and the passenger in the front passenger seat is protected from the impact in the longitudinal direction of the vehicle body in the air bag case 29. An air bag device 19 including an air bag (not shown) for protection and an inflator 18 is housed. The bracket 24 fixed to the bottom surface of the airbag case 29 is superimposed on the bracket 22 fixed to the metal instrument panel reinforcement 20 that extends in the vehicle width direction and supports the instrument panel body 3. Then, both are supported by the instrument panel reinforcement 20 by fastening them with bolts 26.

  A plurality of hook-shaped hooks 31 are fixed to the front side and the rear side of the airbag case 29 at intervals in the vehicle width direction. The hooks 31 are connected to the front frame wall 15a and the rear side of the frame body 15. The frame body 15b is inserted into a plurality of engagement holes 33 formed at intervals in the vehicle width direction on the frame wall 15b, and when the airbag device 19 is operated, the hooks 31 are hooked on the peripheral edges of the engagement holes 33, and the frame body 15 pops out. It is supposed not to.

  Then, when the airbag device 19 is actuated, the breakable portion 7 is broken and the airbag door portion 9 is integrated with the flap portion 21 so as to rotate around the hinge portion 23 and open. It is configured.

As a feature of the present invention, on the outer periphery of the upper end portion of the frame body 15, as shown in FIGS. 4 to 8, a rectangular annular metal reinforcing member 35 is provided on the back surface of the instrument panel body 3 and the upper end portion of the airbag case 29. Are arranged so as to surround the frame 15 correspondingly. Note that the lines AA, BB, CC, DD, and EE in FIG. 3 are the lines AA, BB, CC, DD, and EE in FIG. Each corresponds. The reinforcing member 35 is in contact with the flange portion 25 of the airbag chute 11 and is fixed to the instrument panel 1 integrally with the bottom wall portion 37, and from the one end of the bottom wall portion 37 to the back surface of the instrument panel body 3. an inner wall portion 39 adjacent to the upper end outer periphery of the protruding frame 15 substantially at right angles to the side, opposite the inner wall portion 39 projecting substantially at right angles to the instrument panel main body 3 back side from the other end of the bottom wall portion 37 The outer wall portion 41 is formed into a substantially U-shaped cross section.

  Furthermore, at the projecting end of the outer wall portion 41 of the reinforcing member 35, there are a total of four first projecting piece portions 43 extending outward in the vicinity of both corner portions on the front side of the vehicle body and in both corner portions on the rear side of the vehicle body. Is formed. One screw insertion hole 47 is formed in each of the first projecting piece portions 43, and a first positioning hole 49 is formed in the first projecting piece portion 43 on the front side of the vehicle body. In addition, a second positioning escape hole 50a is formed in the center of both sides in the vehicle width direction of the bottom wall portion 37 of the reinforcing member 35, and a third positioning escape hole 50b is formed in front thereof.

On the other hand, at the outer end of the flange portion 25 of the airbag chute 11, as shown in FIGS. 3 and 7, there are four L-shaped second projecting pieces at positions spaced from the back surface of the instrument panel 1. 51 is integrally formed so as to correspond to the first protruding piece 43 of the reinforcing member 35. One screw insertion hole 55 is formed in each of the second projecting piece portions 51 so as to correspond to the screw insertion holes 47 of the first projecting piece portion 43, and the second projecting piece on the front side of the vehicle body is formed. A first positioning pin 57 for positioning when attaching the reinforcing member 35 to the airbag chute 11 is provided on the portion 51 so as to correspond to the first positioning hole 49 of the first projecting piece 43. ing. Further, at the center of both sides in the vehicle width direction on the rear surface of the flange portion 25, when the airbag chute 11 is vibration welded to the instrument panel main body 3, a second for positioning the airbag chute 11 to the vibration welding jig is provided. A positioning protrusion 59 is provided corresponding to the second positioning escape hole 50a of the reinforcing member 35, and a third positioning protrusion 61 protruding from the back surface of the instrument panel body 3 is inserted in front of the positioning protrusion 59. A third positioning hole 63 is formed corresponding to the third positioning escape hole 50 b of the reinforcing member 35. The shape of the first positioning hole 49 is different on both sides of the vehicle width in order to absorb manufacturing errors between the first positioning pins 57. The reason why the shapes of the third positioning escape hole 50b and the third positioning hole 63 are different on both sides in the vehicle width direction is to absorb manufacturing errors between the third positioning protrusions 61. Further, a clip nut 65 having a burring process around the screw insertion hole is inserted into the second overhanging piece portion 51 so that the screw insertion hole corresponds to the screw insertion hole 55 of the second overhanging piece portion 51. Yes.

  Then, the first positioning pin 57 of the second projecting piece portion 51 is inserted into the first positioning hole 49 of the first projecting piece portion 43, and the second positioning projection 59 of the flange portion 25 is inserted into the first positioning hole 59 of the reinforcing member 35. 2 In a state where the reinforcing member 35 is positioned with respect to the airbag chute 11 by being inserted into the positioning escape hole 50a and aligning the third positioning hole 50b of the reinforcing member 35 with the third positioning hole 63 of the flange portion 25, By inserting the screw 45 from the reinforcing member 35 side into the screw insertion holes 47 and 55 of the first overhanging piece portion 43 and the second overhanging piece portion 51 and fastening them to the clip nut 65, the reinforcing member 35 is attached to the airbag. It is attached to the chute 11. In this state, the bottom wall portion 37 of the reinforcing member 35 is along the rear surface of the flange portion 25, and the inner wall portion 39 is along the outer periphery of the upper end portion of the frame body 15.

  In order to vibration weld the airbag chute 11 to the back surface of the instrument panel main body 3, the second chute 11 is inserted into the welding jig (not shown) of the welding chute (not shown) and set. A separately molded instrument panel body 3 is set on the other welding jig. Next, the third positioning protrusion 61 on the back surface of the instrument panel main body 3 is inserted into the third positioning hole 63 of the airbag chute 11 to position both, and the airbag chute 11 is pressed against the back surface of the instrument panel main body 3. While vibration welding. Thereafter, as described above, the reinforcing member 35 is attached to the airbag chute 11 that is vibration welded to the instrument panel body 3.

  Therefore, according to the instrument panel 1 of the present embodiment, the outer periphery of the upper end portion of the airbag chute 11 is reinforced by the annular reinforcing member 35. Even if the inflation pressure acts on the airbag chute 11, the airbag chute 11 is not damaged, and the airbag door portion 9 can be opened stably.

  Further, since the region above the upper end portion of the airbag case 29 of the frame 15 is reinforced by the reinforcing member 35, the upper end portion of the airbag case 29 is extended to the back side of the instrument panel main body 3 and the back side of the instrument panel main body 3 When the air bag case 29 is assembled to the frame 15, the upper end of the air bag case 29 hits the back surface of the instrument panel body 3 when the air bag case 29 is assembled to the frame 15. Therefore, the airbag case 29 can be easily assembled to the frame body 15.

  Further, the airbag door 9 does not hit the upper end of the airbag case 29 and is supported by the head impact at the time of a vehicle collision, and the airbag door 9 can be easily deformed to absorb the head impact.

  Furthermore, among the reinforcing members 35 having a substantially U-shaped cross section, the bottom wall portion 37 extends along the flange portion 25 of the airbag chute 11 and the inner wall portion 39 extends along the upper end portion of the airbag chute 11. Since the upper end part is reinforced, the reinforcement strength of the said part can be raised.

  In addition, the reinforcing member 35 and the airbag chute 11 are fastened by the first overhanging piece portion 43 and the second overhanging piece portion 51 that are separated from the flange portion 25 that is the welding location to the back side of the instrument panel body 3. Therefore, when the airbag chute 11 is welded to the back surface of the instrument panel body 3, the fastening portion does not get in the way, and the airbag chute 11 can be easily welded to the back surface of the instrument panel body 3.

  The present invention is useful, for example, for a vehicle interior with an airbag door portion that has an airbag door portion that is opened by the operation of an airbag device when a vehicle collides, such as an instrument panel.

It is a perspective view of the instrument panel which concerns on embodiment of this invention. It is sectional drawing in the AA of FIG. It is a top view of an airbag chute. It is a top view of a reinforcing member. It is sectional drawing in the BB line of FIG. It is sectional drawing in the CC line of FIG. It is sectional drawing in the DD line | wire of FIG. It is sectional drawing in the EE line | wire of FIG.

1 Instrument panel 3 Instrument panel body
DESCRIPTION OF SYMBOLS 7 Planned break part 9 Airbag door part 11 Airbag chute 13 Shooting port 15 Frame 19 Airbag apparatus 21 Flap part 23 Hinge part 25 Flange part 27 Welding rib
DESCRIPTION OF SYMBOLS 29 Airbag case 35 Reinforcement member 37 Bottom wall part 39 Inner side wall part 41 Outer side wall part 43 1st overhanging piece part 51 2nd overhanging piece part

Claims (2)

An interior door body (3) in which an airbag door section (9) that is opened by the operation of the airbag device (19) is partitioned by a section to be broken (7), and the airbag door section on the back surface of the interior body body (3). A cylindrical airbag chute (11) provided integrally with and corresponding to (9) and containing the airbag device (19) therein,
The vehicle interior product with an airbag door portion configured to open the airbag door portion (9) by breaking the planned breaking portion (7) by the operation of the airbag device (19) at the time of a vehicle collision. And
The airbag chute (11) has a cylindrical frame (15) and an upper end disposed inside the frame (15) at a distance from the back surface of the interior body (3), and an airbag inside. An air bag case (29) in which the device (19) is housed, a flange portion (25) extending outward from the upper edge of the frame ( 15 ) and welded to the back surface of the interior body (3) With
On the outer periphery of the upper end portion of the airbag chute (11), a bottom wall portion (37) fixed integrally to the flange portion (25) of the airbag chute (11), and a bottom wall portion (37) The frame body of the airbag chute (11) projects from one end to the back side of the interior body (3) and corresponds at least between the back surface of the interior body (3) and the upper end of the airbag case (29). ( 15 ) An airbag door characterized in that a reinforcing member (35) having an inner wall portion (39) disposed close to the outer periphery of the upper end portion is provided so as to surround the airbag chute (11). Interior parts for vehicles with parts. In the vehicle interior with an airbag door part according to claim 1,
The reinforcing member (35) includes an outer wall (41) that protrudes from the other end of the bottom wall (37) to the back side of the interior body (3) and faces the inner wall (39), and The bottom wall portion (37), the inner wall portion (39) and the outer wall portion (41) are formed in a substantially U-shaped cross section,
A plurality of first projecting piece portions (43) extending outward are formed at the projecting end of the outer wall portion (41),
The flange portion (25) of the airbag chute (11) is fastened to the outer end of the flange portion (25) along the outer wall portion (41) and the first protruding piece portion (43) with the first protruding piece portion (43). The interior part for vehicles with an airbag door part characterized by the 2nd overhang | projection piece part (51) formed in the position spaced apart from the said interior article main body (3) back surface.

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