JP2010125909A - Vehicular interior article having airbag door section - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent damage to an attaching section of an airbag case and to smoothly deploy an airbag door section. <P>SOLUTION: A sheet-like projection 25 is projectingly arranged so as to surround the airbag door section 13 in a rectangular annular shape from the outside and the attaching section 31b of the airbag case 51 is formed departing from the projection 25 to the outside of the airbag door section 13 in the back face of a panel constituting member body 7. An inner abutting section 61 which faces the projection 25 from inside the airbag door section 13 and upon which the projection 25 abuts from outside the airbag door section 13 by opening motion of the airbag door section 13 is projectingly arranged integrally in the airbag case 51. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle interior with an airbag door portion including an airbag door portion that is opened by breaking an fragile portion by an operation of an airbag device at the time of a collision of an automobile, for example.

In the vehicle interior product with an airbag door part disclosed in Patent Document 1, the airbag door part is partitioned and formed on the resin panel by a hinge part and a part to be broken, and the attachment part of the airbag case is the above-described air bag. A rectangular annular plate is projected on the back surface of the resin panel so as to correspond to the outer periphery of the bag door portion, and a hinge portion is formed close to one side of the mounting portion.
JP 2000-135958 A

  However, in Patent Document 1, since the attachment portion of the airbag case is close to the airbag case, if the inflation pressure acts on the airbag case when the airbag is inflated, the attachment is caused by the stress from the airbag case. The part may be damaged.

  Also, if the mounting portion of the airbag case is separated from the hinge portion, the stress from the airbag case acting on the mounting portion is reduced, but the inflation pressure of the airbag is between the mounting portion and the hinge portion of the resin panel. As a result, the resin panel on the outside of the airbag door part is turned up, and the pivot center of the airbag door part tends to shift from the hinge part to the outside of the airbag door part. In such a case, the inflation pressure of the airbag may be dispersed outside the airbag door portion, and the airbag door portion may not be smoothly deployed.

  This invention is made | formed in view of this point, and the place made into the objective is to make the airbag door part expand | deployed smoothly while preventing the damage of the attaching part of an airbag case.

  In order to achieve the above-mentioned object, the present invention projects the mounting portion of the airbag case away from the hinge portion on the back surface of the resin panel to increase the rigidity of the resin panel between the mounting portion and the hinge portion. It is characterized by that.

  Specifically, according to the present invention, an air bag door portion is partitioned and formed on a resin panel by a hinge portion and a portion to be broken, and an air bag case storing an air bag is attached to the back side of the air bag door portion. For vehicle interior parts with bag doors, the following solutions were taken.

  That is, the invention according to claim 1 is characterized in that a protrusion is provided on the back surface of the resin panel in the vicinity of the hinge portion outside the airbag door portion so as to follow the hinge portion. A mounting portion of the case is formed so as to be separated from the airbag door portion outside the ridge portion, and the airbag case is opposed to the ridge portion from the inside of the airbag door portion to open the airbag door portion. A rigid body having an inner abutting portion with which the ridge portion abuts from the outer side of the airbag door portion by operation is formed.

  According to a second aspect of the present invention, in the vehicle interior part with an airbag door portion according to the first aspect, the resin panel is formed by integrally bonding a skin made of an elastomer resin to a surface side of a base material made of a rigid resin. The base material corresponding to the hinge portion is formed to be more fragile than the peripheral base material.

  According to a third aspect of the present invention, in the vehicle interior with an airbag door portion according to the first aspect, the ridge portion surrounds the airbag door portion in an annular shape from the outside. .

  According to a fourth aspect of the present invention, in the vehicle interior with an airbag door portion according to the first aspect, the protruding portion does not contact the inner contact portion of the rigid body from the inner side of the airbag door portion. The approaching outer abutment portion is extended.

  According to the first aspect of the invention, since the attachment portion of the airbag case is separated from the airbag case, the attachment portion is damaged due to the stress from the airbag case acting on the attachment portion when the airbag is inflated. Is prevented.

  Further, the opening operation of the airbag door portion prevents the protruding portion from coming into contact with the inner contact portion from the outer side of the airbag door portion and moving toward the inner side of the airbag door portion. As a result, the resin panel is prevented from turning up between the ridge portion and the mounting portion of the airbag door portion, and the pivot center of the airbag door portion may be shifted to the outside of the airbag door portion from the ridge portion. Is prevented. As a result, the inflation pressure of the airbag is concentrated inside the airbag door portion, and the airbag door portion is smoothly deployed.

  According to the invention which concerns on Claim 2, since the base material corresponding to a hinge part is formed weakly, it fractures | ruptures easily at the time of rotation of an airbag door part. Thereby, since the hinge part is in a state constituted only by the skin and is easily bent, the airbag door part can be deployed more smoothly. Further, since the skin is made of a tough elastomer resin and is not easily broken, scattering of the base material constituting the airbag door portion to the front side of the airbag door portion is prevented.

  According to the invention which concerns on Claim 3, since the protrusion part has surrounded the airbag door part over the perimeter, while the rigidity of an airbag door part is improved, the broken line of a hinge part and the fracture | rupture of a planned fracture | rupture part The line is prevented from running outside the region surrounded by the ridges.

  According to the invention which concerns on Claim 4, when attaching an airbag case to the attachment part of an airbag door part, a protrusion part is pinched | interposed between an inner side contact part and an outer side contact part, and an airbag case is resin Can be positioned relative to the panel. Therefore, it is easy to attach the airbag case to the resin panel.

  Further, when the airbag is inflated, the protruding portion contacts or approaches the outer contact portion from the inner side of the airbag door portion, and movement of the protruding portion toward the outer side of the airbag door portion is suppressed. In particular, the outer abutment portion abuts or approaches the proximal end of the ridge portion to prevent movement of the distal end of the ridge portion toward the inside of the airbag door portion. Thereby, the protruding portion is stably prevented and the resin panel is prevented from being turned up between the protruding portion and the mounting portion of the airbag door portion. As a result, the inflation pressure of the airbag can be more reliably concentrated on the inside of the airbag door.

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

  FIG.1 and FIG.2 shows the panel structural member 1 as a vehicle interior goods with an airbag door part which comprises the left half of the upper panel in a vehicle instrument panel. The panel constituting member 1 is for a right-hand drive vehicle, and is disposed on the passenger seat side adjacent to the left side of the driver's seat. As shown in FIGS. 3 to 7, the base material 3 made of a rigid resin such as polypropylene (PP), for example. A panel component member body 7 as a resin panel formed by integrally joining a skin 5 made of a thermoplastic elastomer resin such as TPO (Thermoplastic polyolefin), TPS (Thermoplastic styrene), TPU (Thermoplastic polyurethane), etc. I have. Although not shown, the skin 5 is composed of a skin layer having a high resin density and a foam layer integrally formed on the back side of the skin layer and having a large number of voids therein. In the foam layer, The resin density is lower than that of the skin layer and gradually increases as it approaches the skin layer.

  As shown in FIG. 1, the panel component member body 7 is formed with an H-shaped planned break portion 9 in a plan view, and connects both ends of the two sides of the planned break portion 9 on the side of the vehicle body. The break groove portion 19 having a substantially V-shaped cross section is formed on the back surface of the base material 3 of the panel component member body 7 by molding so that the cut groove portion 19 does not reach the skin 5. The skin 5 corresponding to the breaking groove portion 19 constitutes a vehicle body front hinge portion 11a and a vehicle body rear hinge portion 11b extending in the vehicle width direction. The base material 3 corresponding to the vehicle body front side hinge portion 11a and the vehicle body rear side hinge portion 11b is weaker than the base material 3 in the vicinity thereof by the breaking groove portion 19. Further, in the planned break portion 9 of the base material 3, many slits 23 formed by laser processing are formed so as to reach the middle of the skin 5 in the thickness direction from the back surface of the base material 3.

  An airbag door portion 13 is defined by the planned break portion 9, the vehicle body front hinge portion 11a, and the vehicle body rear hinge portion 11b. The airbag door portion 13 is a double door type that includes a front door portion 15 and a rear door portion 17 and opens upward in the longitudinal direction of the vehicle body.

  A protrusion 21 having a substantially triangular cross section is formed on the back surface of the base material 3 along the inner side edge of the airbag door 13 of the breaking groove 19. The protrusion 21 prevents the panel component member body 7 from being bent at a position away from the fracture groove 19.

  On the back surface of the panel component member body 7, a plate-like ridge portion 25 is provided so as to surround the airbag door portion 13 from the outside in a rectangular ring shape. The ridge portion 25 is stably supported by a plurality of reinforcing ribs 27 whose plate surfaces are orthogonal to the ridge portion 25. Further, on the rear surface of the panel component member body 7, attachment portions 31 a to 31 f of an airbag case 51 to be described later are separated to the outer side of the airbag door portion 13 with respect to the ridge portion 25, and 4 on the front side of the airbag door portion 13. It is formed at one place and one place on the left and right. The attachment portions 31a to 31f include a rectangular attachment wall portion 35 in which a tapping screw insertion hole 33 is formed, and a leg portion 37 protruding from the back surface of the panel component member body 7 so as to support the attachment wall portion 35. And is formed from. A concave portion 41 having a rectangular shape in plan view is formed around the tapping screw insertion hole 33 on the surface of the mounting wall portion 35 so that the spring nut 73 can be fitted therein. The four attachment portions 31a to 31d in front of the airbag door portion 13 are arranged at substantially equal positions in the vehicle body front-rear direction at substantially equal intervals in the vehicle width direction, and the two central attachment portions 31b and 31c have a plate surface on the vehicle body. The two reinforcing ribs 43 are connected in the front-rear direction.

  Further, a circular screw hole 45 for attaching the panel constituent member 1 to the instrument panel frame 44 and a rectangular shape for attaching the panel constituent member 1 to the decoration panel or center panel are provided on the outer periphery of the panel constituent member main body 7. A plurality of clip holes 47 are formed. As shown in FIG. 4, when the tapping screw 42c is inserted into the screw hole 45 using the metal collar 42a and the spring nut 42b, the panel constituting member 1 sandwiches the second bracket 72 (described later) in the instrument panel frame 44. It is attached in the state.

  On the back side of the airbag door portion 13, a rectangular annular metal airbag case 51 that houses an airbag device 49 is attached. The airbag case 51 includes a front wall portion 53 and a rear wall portion 55 that extend in the vehicle width direction, and both side wall portions 57 that extend in the vehicle body front-rear direction connecting both ends of the front wall portion 53 and the rear wall portion 55. It is configured. Upper ends of the front wall portion 53, the rear wall portion 55, and both side wall portions 57 extend to constitute a restriction frame portion 58 that restricts the movement of the ridge portion 25. The restricting frame portion 58 is a rigid body made of the same metal as the airbag case 51. The restriction frame portion 58 is integrally suspended from a plate-like protrusion 59 that protrudes outward from the airbag case 51 with the plate surface facing the airbag door portion 13, and a protruding end of the protrusion 59. And a plate-like inner contact portion 61 extending downward. The inner contact portion 61 is opposed to the ridge portion 25 from the inside of the airbag door portion 13. Further, as shown in FIG. 5, at two locations spaced in the vehicle width direction of the inner abutting portion 61 of the front wall portion 53, a cross-section L-shape that extends outward from the airbag case 51 and bends upward. An outer abutment portion 67 is extended. As a result, a U-shaped groove 68 is formed by the inner abutting portion 61 and the outer abutting portion 67, and the ridge portion 25 is located in the groove 68, so that the outer abutting portion 67 is connected to the outer door portion 13 from the inside. You are approaching.

  A first bracket 71 having a plurality of tapping screw insertion holes 69 is fixed to the outer surfaces of the front wall portion 53 and the side wall portions 57 of the airbag case 51 so as to correspond to the mounting portions 31a to 31f. A spring nut 73 is made to correspond to the tapping screw insertion holes 33 of the six attachment portions 31 a to 31 f and the tapping screw 75 is inserted into the tapping screw insertion holes 33 and the tapping screw insertion holes 69 of the first bracket 71, whereby the airbag case 51. Are attached to the attachment portions 31a to 31f. A second bracket 72 having a plurality of tapping screw insertion holes 70 is fixed to the outer surface of the rear wall portion 55 of the airbag case 51 so as to correspond to the screw holes 45 and the clip holes 47 of the panel component member 1. Has been.

  The airbag device 49 accommodates a folded airbag, an inflator, and the like, and a third bracket 77 is welded to the bottom surface of the airbag device 49. On the other hand, one end of the fourth bracket 81 is welded to the instrument panel reinforcement 79 that extends in the vehicle width direction and supports the instrument panel, and the other end of the fourth bracket 81 is connected to the third bracket 77 and the bolt 83. It is connected with a nut 85. Thus, the airbag device 49 is connected and supported by the instrument panel reinforcement 79 via the third and fourth brackets 77 and 81 so as to correspond to the airbag door portion 13.

  In the panel component 1 configured as described above, when the vehicle collides, the airbag of the airbag device 49 is inflated by the operation of the inflator and guided to the airbag case 51 from the state indicated by the phantom line in FIG. The airbag door portion 13 is pressed upward by the deployment pressure, and the planned break portion 9 is broken, and the front door portion 15 is rotated about the vehicle body front hinge portion 11a as a fulcrum and is deployed upward in the vehicle body front. The rear door portion 17 rotates about the vehicle body rear hinge portion 11b as a fulcrum and expands rearward and upward in the vehicle body. At this time, by the opening operation of the front door portion 15 and the rear door portion 17, the ridge portion 25 contacts the inner contact portion 61 from the outer side of the airbag door portion 13 and moves toward the inner side of the airbag door portion 13. Is prevented. Thereby, the panel component member main body 7 is prevented from turning up between the ridge portion 25 and the attachment portions 31 a to 31 d, and the airbag door portion 13 is more pivoted than the ridge portion 25. It is prevented that it shifts outside. Further, at this time, since the ridge portion 25 is approaching the outer abutting portion 67 from the inside of the airbag door portion 13, the movement of the ridge portion 25 in the outward direction of the airbag door portion 13 is suppressed. In particular, the outer abutting portion 67 approaches the proximal end of the ridge portion 25 and prevents the distal end of the ridge portion 25 from moving in the direction toward the inside of the airbag door portion 13. Thereby, the protrusion part 25 is stabilized, and the panel component member main body 7 between the protrusion part 25 and the attachment parts 31a-31d is prevented more reliably. Therefore, the inflation pressure of the airbag is concentrated on the inside of the airbag door portion 13 so that the airbag door portion 13 is smoothly deployed.

  At this time, the location where the fracture groove 19 is formed in the base material 3 is broken by the deployment pressure of the airbag, but the skin 5 is not broken, and the vehicle body front hinge portion 11a and the vehicle body rear hinge portion 11b are composed of the skin 5 alone. As a result, the airbag door portion 13 is smoothly deployed. In addition, since the skin 5 is made of a tough elastomer resin and is not easily broken, scattering of the base material 3 constituting the airbag door 13 to the front side of the airbag door 13 is prevented.

  Therefore, according to the present embodiment, since the attachment portions 31a to 31f of the airbag case 51 are separated from the airbag case 51, the stress from the airbag case 51 is applied to the attachment portions 31a to 31f when the airbag is inflated. The attachment portions 31a to 31f are prevented from being damaged by acting on each other.

  Further, since the ridge portion 25 surrounds the airbag door portion 13 over the entire circumference, the rigidity of the airbag door portion 13 is enhanced, and the folding line and the planned breaking portion of the vehicle body front hinge portion 11a and the vehicle body rear hinge portion 11b are also provided. Nine break lines are prevented from running outside the region surrounded by the ridges 25.

  Further, when the airbag case 51 is attached to the attachment portions 31a to 31f of the airbag door portion 13, the protrusion 25 is sandwiched between the inner contact portion 61 and the outer contact portion 67, and the airbag case 51 is configured as a panel. Positioning relative to the member 1 is possible. Therefore, the work of attaching the airbag case 51 to the panel constituent member 1 is facilitated.

  Further, since the protrusion 25 is only in contact with the airbag case 51 without being screwed, the airbag case 51 is allowed to move in the vertical direction due to the inflation pressure of the airbag, and the inflation pressure is absorbed. Therefore, the vicinity of the contact portion between the protrusion 25 and the airbag case 51 is less likely to be damaged than in the case where the screw is tightened.

  Moreover, since the base material 3 corresponding to the vehicle body front side hinge part 11a and the vehicle body rear side hinge part 11b is made weak by forming the fracture groove part 19 by molding, compared with the case of making it weak by laser processing, The distance for laser processing is shortened, and adjustment of the laser intensity is not necessary, facilitating manufacture.

  In the present embodiment, the ridge portion 25 is approaching the outer abutting portion 67 from the inside of the airbag door portion 13, but may be abutted.

  INDUSTRIAL APPLICABILITY The present invention is useful, for example, as an interior product for a vehicle with an airbag door portion that includes an airbag door portion that is opened by breaking an fragile portion by an operation of an airbag device in the event of a car collision.

It is a top view of a panel structural member. It is a reverse view of a panel structural member. FIG. 3 is a cross-sectional view corresponding to the line AA in FIGS. 1 and 2. FIG. 3 is a cross-sectional view corresponding to the line BB in FIGS. 1 and 2. FIG. 3 is a cross-sectional view corresponding to the line CC in FIGS. 1 and 2. FIG. 3 is a cross-sectional view corresponding to the line DD in FIGS. 1 and 2. It is the E section enlarged view of FIG. 3 at the time of airbag expansion | swelling.

Explanation of symbols

1 Panel component (vehicle interior with airbag door)
3 Substrate 5 Skin 7 Panel component body (resin panel)
9 Fracture scheduled part 11a Car body front side hinge part 11b Car body rear side hinge part 13 Airbag door part 25 Projection part 31a-31f Attachment part 51 Airbag case 61 Inner contact part 67 Outer contact part

Claims (4)

The vehicle door interior part with an airbag door part in which an airbag door part is partitioned and formed on a resin panel by a hinge part and a part to be broken, and an airbag case containing the airbag is attached to the back side of the airbag door part. There,
On the back surface of the resin panel, a ridge portion is provided so as to extend along the hinge portion in the vicinity of the hinge portion outside the airbag door portion, and the mounting portion of the airbag case is more than the ridge portion. It is formed apart from the airbag door part,
The airbag case has a rigid body having an inner abutting portion that faces the ridge portion from the inside of the airbag door portion and contacts the ridge portion from the outer side of the airbag door portion by an opening operation of the airbag door portion. An interior product for a vehicle with an airbag door, characterized by being formed. In the vehicle interior with an airbag door part according to claim 1,
The resin panel is configured by integrally joining an outer skin made of an elastomer resin on the surface side of a base material made of a rigid resin,
The vehicle interior part with an airbag door part, characterized in that the base material corresponding to the hinge part is formed more fragile than the surrounding base material. In the vehicle interior with an airbag door part according to claim 1,
The vehicle interior part with an airbag door part, wherein the protruding part surrounds the airbag door part annularly from the outside. In the vehicle interior with an airbag door part according to claim 1,
An interior part for a vehicle with an airbag door part, wherein an outer abutting part is provided on the inner abutting part of the rigid body so that the protruding part abuts or approaches from the inner side of the airbag door part. .

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