JP2010132079A - Reinforcing structure of door for vehicle - Google Patents

Abstract

An object of the present invention is to provide a vehicle door in which a metal airbag is set in a beltline reinforcing portion, and to increase the cross-sectional strength and proof strength of the beltline reinforcing portion when the metal airbag is operated.
An inflator 22 provided at an end of a beltline reinforcing portion 18 of a vehicle door operates at the time of a frontal collision of the vehicle, and gas is supplied into a closed cross section 30 of the beltline reinforcing portion 18. Thereby, at least one of the outer panel 26 and the inner panel 28 constituting the belt line reinforcing portion 18 is developed, and the cross-section developing portion 32 of the belt line reinforcing portion 18 is plastically developed. A pipe member 24 is sandwiched and disposed between an end portion 34 of which the cross section is narrowed in accordance with the inflator 22 in the belt line reinforcing portion 18 and the inflator 22 provided on the end portion 34, and The pipe member 24 extends to the cross-section development portion 32, whereby the end portion 34 is reinforced.
[Selection] Figure 3

Description

  The present invention relates to a reinforcing structure for a vehicle door.

Made of a first metal layer and a second metal layer, at least one of which is plastically deformable, the peripheries of these layers being sealed together to form a chamber; A metal airbag is disclosed in which gas is supplied from a gas generating means (inflator) to the chamber (see Patent Document 1). This conventional example also discloses that a metal airbag is attached to a side door (vehicle door) for protection in a side collision.
JP-T-2004-500204 gazette

  However, nothing is disclosed about details of attaching a metal airbag to a vehicle door. In order to apply the metal airbag as in the conventional example to the vehicle door, for example, when an inflator having a relatively small outer diameter is attached to the end of the beltline reinforcing portion, the inflator is supplied from the inflator when the vehicle collides. It is considered that it is necessary to squeeze the end portion so that gas does not leak from the end portion of the belt line reinforcing portion.

  However, just narrowing the end of the beltline reinforcing part increases the difference in cross-sectional strength between the beltline reinforcing part and the cross-sectional developed part where the cross-section expands and the strength increases. .

  In consideration of the above-mentioned facts, the present invention aims to increase the cross-sectional strength and proof strength of a beltline reinforcing portion during operation of the metal airbag in a vehicle door in which a metal airbag is set in the beltline reinforcing portion. And

  The invention according to claim 1 has a closed cross section that extends in the vehicle front-rear direction at the upper edge of the vehicle door and includes an outer panel positioned on the vehicle outer side and an inner panel positioned on the vehicle inner side, and the outer panel and the inner panel. At least one of the beltline reinforcing part having a cross-sectionally developed part that develops plastically by being developed by the pressure of the gas supplied in the closed cross-section, and an end of the beltline reinforcing part. An inflator for supplying gas into the closed cross section at the time of a frontal collision, and the end portion and the inflator so as to reinforce the end portion of the beltline reinforcing portion whose cross section is narrowed to match the inflator A pipe member that is sandwiched between the pipe members and extends to the cross-section development portion.

  In the vehicle door reinforcing structure according to claim 1, the inflator provided at the end of the belt line reinforcing portion of the vehicle door operates in the event of a frontal collision of the vehicle, and is within the closed cross section of the belt line reinforcing portion. Gas is supplied. As a result, at least one of the outer panel and the inner panel constituting the beltline reinforcing portion is developed, and the cross-section developing portion of the beltline reinforcing portion is plastically developed. Thereby, the cross-sectional strength and proof stress of the beltline reinforcement part with respect to the axial compression load input into the vehicle door can be improved.

  Here, a pipe member is sandwiched between the end portion of the beltline reinforcing portion whose section is narrowed to match the inflator and the inflator provided at the end portion, and the pipe member is Since the end of the beltline reinforcing part is reinforced by this, the cross-sectional strength and proof strength of the end are reduced even when the cross-section of the end is squeezed to match the inflator. Can be secured. Therefore, in the vehicle door in which the metal airbag is set in the beltline reinforcing portion, the cross-sectional strength and proof strength of the beltline reinforcing portion when the metal airbag is activated can be increased.

  The invention according to claim 2 has a closed cross section that extends in the vehicle front-rear direction at the upper edge of the vehicle door and includes an outer panel positioned on the vehicle outer side and an inner panel positioned on the vehicle inner side, and the outer panel and the inner panel. A belt line reinforcing portion having a cross-section development portion in which the closed cross-section is developed by plastic development by the pressure of a gas supplied into the closed cross-section, and the belt line in a state covered with a cover. An inflator that is provided at an end of the reinforcing part and supplies gas into the closed cross section at the time of a frontal collision of the vehicle, and the end of the beltline reinforcing part that has a narrowed cross section to match the inflator And a coupling member that couples the outer panel and the inner panel and the cover of the inflator.

  In the vehicle door reinforcing structure according to claim 2, the inflator provided at the end of the belt line reinforcing portion of the vehicle door operates in the event of a frontal collision of the vehicle, and is within the closed cross section of the belt line reinforcing portion. Gas is supplied. As a result, at least one of the outer panel and the inner panel constituting the beltline reinforcing portion is developed, and the cross-section developing portion of the beltline reinforcing portion is plastically developed. Thereby, the cross-sectional strength and proof stress of the beltline reinforcement part with respect to the axial compression load input into the vehicle door can be improved.

  Here, the cover of the inflator, the outer panel and the inner panel constituting the belt line reinforcing portion are coupled by a coupling member, and thereby the end portion of the belt line reinforcing portion is reinforced. Even if the cross section is narrowed to match the inflator, the cross-sectional strength and proof strength of the end can be ensured. Therefore, in the vehicle door in which the metal airbag is set in the beltline reinforcing portion, the cross-sectional strength and proof strength of the beltline reinforcing portion when the metal airbag is activated can be increased.

  As described above, according to the vehicle door reinforcement structure according to claim 1 of the present invention, in the vehicle door in which the metal airbag is set in the beltline reinforcement portion, the metal airbag is activated. An excellent effect is obtained in that the cross-sectional strength and proof strength of the beltline reinforcing portion can be increased.

  According to the vehicle door reinforcement structure according to claim 2, in the vehicle door in which a metal airbag is set in the beltline reinforcement portion, the cross-sectional strength and proof strength of the beltline reinforcement portion when the metal airbag is activated. It is possible to obtain an excellent effect that it can be increased.

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

[First Embodiment]
In FIG. 2, the vehicle door reinforcement structure 10 according to the present embodiment is related to the reinforcement structure in the upper edge of the vehicle door 14 provided on the side of the vehicle 12, that is, the belt line 16. And an inflator 22 and a pipe member 24.

  In FIG. 2, the beltline reinforcing portion 18 extends in the vehicle front-rear direction at the upper edge of the vehicle door 14 and is fixed to, for example, a door inner panel 25. As shown in FIG. 6, the belt line reinforcing portion 18 has a closed cross section 30 constituted by an outer panel 26 positioned on the vehicle outer side and an inner panel 28 positioned on the vehicle inner side. Further, in FIGS. 3 to 6, the belt line reinforcing portion 18 is a cross-sectional developed portion in which at least one of the outer panel 26 and the inner panel 28 develops plastically by developing with the pressure of gas supplied into the closed cross-section 30. 32.

  As shown in FIGS. 4 and 6A, the outer panel 26 of the beltline reinforcing portion 18 is formed by press-molding, for example, a steel plate, and has, for example, a convex portion 26A having a corrugated cross section between the upper and lower flange portions 26F. , 26B, 26C are formed to bulge outward from the vehicle. Between the convex portions 26A and 26B and between the convex portions 26B and 26C, concave portions 26D and 26E are respectively provided in the vehicle inside. The convex portions 26A, 26B, and 26C and the concave portions 26D and 26E extend along the longitudinal direction of the outer panel 26 in the cross-section development portion 32. Further, as shown in FIG. 4, the interval between the upper and lower flange portions 26 </ b> F is substantially constant in the cross-section development portion 32, and is narrower than the cross-section development portion 32 at the end 34 on the vehicle front side from the cross-section development portion 32. It has been. A vehicle inner surface of the convex portion 26 </ b> B at the end portion 34 on the vehicle front side is an arc surface 26 </ b> G corresponding to the outer diameter of the pipe member 24.

  As shown in FIGS. 4 and 6A, the inner panel 28 of the beltline reinforcing portion 18 is formed by press-molding a steel plate, for example, and a convex portion 28A is provided between the upper and lower flange portions 28F inside the vehicle. The bulge is formed. As a result, the inner panel 28 has a substantially hat-shaped cross section. The interval between the upper and lower flange portions 28 </ b> F is substantially constant at the cross-section development portion 32, and is narrower than the cross-section development portion 32 at the end portion 34 on the vehicle front side from the cross-section development portion 32.

  As shown in FIG. 4, a concave portion 36 corresponding to the outer diameter of the pipe member 24 is formed in a region from the vehicle front side end portion 34 to the cross-sectional developed portion 32 on the vehicle outer surface of the convex portion 28 </ b> A. An inclined guide surface 38 that guides gas from the inflator 22 into the closed cross-section 30 is formed on the vehicle rear side of the recess 36. Thus, the cross section of the end 34 on the front side of the beltline reinforcing portion 18 is narrowed in accordance with the inflator 22. In FIG. 2, the end portion 35 on the vehicle rear side of the beltline reinforcing portion 18 is sealed so that the gas supplied from the inflator 22 does not leak.

  3 and 4, the inflator 22 is provided at, for example, the front end 34 of the beltline reinforcing portion 18, and supplies gas into the closed section 30 of the beltline reinforcing portion 18 when the vehicle 12 collides with the front surface. Generator. The inflator 22 is configured, for example, in a cylindrical shape, and is sandwiched and fixed between an outer panel 26 and an inner panel 28 of the beltline reinforcing portion 18 via a pipe member 24 described later. The inflator 22 is connected to the ECU via the wire harness 40 and is operated by an operating current from the ECU so as to supply an expansion gas to the closed cross section 30 of the beltline reinforcing portion 18. It is configured. The ECU is configured to flow an operating current to the inflator 22 when a frontal collision of the vehicle 12 is determined based on a signal from a collision sensor (not shown).

  3 and 4, the pipe member 24 is connected to the end portion 34 and the inflator so as to reinforce the end portion 34 on the front side of the vehicle whose cross section is narrowed in accordance with the outer diameter of the inflator 22 in the belt line reinforcing portion 18. 22 and is arranged so as to be sandwiched between the two and the cross-section development portion 32. Specifically, the pipe member 24 is, for example, a metal circular pipe penetrating in the vehicle front-rear direction, and is sandwiched between the arc surface 26G of the outer panel 26 and the recess 36 of the inner panel 28.

  Thus, in this embodiment, the metal airbag 42 is comprised by providing the inflator 22 in the vehicle front side edge part 34 of the beltline reinforcement part 18 which has the cross-section expansion | deployment part 32. FIG. For example, the metal airbags 42 are respectively set on the front and rear vehicle doors 14.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 2, in the vehicle door reinforcement structure 10 according to the present embodiment, the metal airbag 42 is provided on the belt line 16 of the vehicle door 14, so that the vehicle 12 (FIG. 1) collides frontward and is illustrated. When the ECU determines the occurrence of the collision based on a signal from the collision sensor that does not perform, an operating current flows from the ECU to the inflator 22 through the wire harness 40 (FIG. 3). The inflator 22 operates in response to the operating current, and ejects a large amount of gas to the rear of the vehicle. This gas is guided into the closed cross section 30 by the guide surface 38 on the inner panel 28 side of the belt line reinforcing portion 18, and is directly supplied into the closed cross section 30 on the outer panel 26 side of the belt line reinforcing portion 18. The Thereby, the cross-section development part 32 of the beltline reinforcement part 18 develops plastically.

  Specifically, as shown in FIGS. 6A and 6B, the outer panel 26 constituting the beltline reinforcing portion 18 is formed by the pressure of the gas supplied from the inflator 22 (FIG. 3) into the closed cross section 30. And at least one of the inner panel 28 expands. In the present embodiment, the concave portion 26D and the concave portion 26E of the outer panel 26 are deformed and expanded so as to be inverted to the vehicle outer side, and the convex portion 28A of the inner panel 28 is deformed so as to swell toward the vehicle inner side. 18 cross-section development parts 32 develop plastically (see also FIG. 5). Thereby, the cross-sectional strength and proof stress of the beltline reinforcement part 18 with respect to the axial compression load (not shown) input into the vehicle door 14 can be improved.

  Here, the pipe member 24 is sandwiched between the front end portion 34 of the beltline reinforcing portion 18 whose section is narrowed in accordance with the inflator 22 and the inflator 22 provided at the end portion 34. And the pipe member 24 extends to the cross-section development portion 32, whereby the end portion 34 of the beltline reinforcing portion 18 on the vehicle front side is reinforced, so that the cross-section of the end portion 34 is the inflator 22. Even if it is squeezed to match, the cross-sectional strength and proof strength of the end portion 34 can be ensured. Thereby, the cross-sectional strength and proof stress of the beltline reinforcement part 18 whole can be raised.

[Second Embodiment]
7 to 9, in the vehicle door reinforcing structure 20 according to the present embodiment, the end portion 34 on the front side of the vehicle, the section of which is narrowed in accordance with the inflator 22 in the beltline reinforcing portion 18, is reinforced. The outer panel 26 and the inner panel 28 of the beltline reinforcing portion 18 and the cover 44 of the inflator 22 are coupled by a coupling member 46.

  Specifically, the inflator 22 is provided at, for example, an end 34 on the vehicle front side of the beltline reinforcing portion 18 in a state of being covered by the cover 44. The cover 44 is, for example, a metal circular tube penetrating in the vehicle front-rear direction, and is sandwiched between the arc surface 26G of the outer panel 26 and the recess 36 of the inner panel 28 in the beltline reinforcing portion 18.

  The coupling member 46 is, for example, a plate-like stay extending from the upper rear portion and the lower rear portion of the cover 44 obliquely upward at the rear of the vehicle and obliquely downward at the rear of the vehicle. The rear end portion 46A of the coupling member 46 is sandwiched between the upper and lower flange portions 26F and 28F of the outer panel 26 and the inner panel 28 and fixed by, for example, spot welding. For this reason, mounting seats 26H and 28H corresponding to the rear end portion 46A are respectively recessed in the vehicle inner surface of the flange portion 26F and the vehicle outer surface of the flange portion 28F.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. The action in which gas is supplied from the inflator 22 into the closed cross section 30 of the beltline reinforcing portion 18 and the cross section expanding portion 32 is plastically expanded at the time of a frontal collision of the vehicle 12 (FIG. 1) is the same as in the first embodiment. is there.

  In this embodiment, the inflator 22 provided at the end 34 of the beltline reinforcing portion 18 on the vehicle front side, and the outer panel 26 and the inner panel 28 constituting the beltline reinforcing portion 18 are coupled by the coupling member 46. As a result, the end 34 on the vehicle front side of the beltline reinforcing portion 18 is reinforced, so that even if the cross section of the end 34 is squeezed to match the inflator 22, Yield strength can be secured.

  Specifically, at the time of a frontal collision of the vehicle 12 (FIG. 1), the axial compressive load input to the end 34 on the vehicle front side of the beltline reinforcing portion 18 in the vehicle door 14 (FIG. 1) is the cover of the inflator 22. 44 to the upper and lower flange portions 26F of the outer panel 26 and the upper and lower flange portions 28F of the inner panel 28 via the upper and lower coupling members 46. Thereby, since the deformation | transformation of the edge part 34 on the vehicle front side is suppressed, the cross-sectional strength and proof stress of the beltline reinforcement part 18 whole can be raised.

  In each of the above embodiments, the inflator 22 is provided at the end 34 on the front side of the beltline reinforcing portion 18. However, the present invention is not limited to this, and the inflator 22 is provided at the end 35 on the rear side of the vehicle. The front end 34 may be sealed.

1 to 6 relate to a first embodiment, and FIG. 1 is a perspective view showing a vehicle. It is a perspective view which shows the reinforcement structure of the door for vehicles. It is an expansion perspective view which shows the reinforcement structure of the door for vehicles. It is an expansion disassembled perspective view which shows the reinforcement structure of the door for vehicles. It is an expansion perspective view which shows the state which the cross-section expansion | deployment part expand | deployed. (A) It is a 6A-6A arrow sectional drawing in FIG. 3 which shows the shape of the closed cross section in the normal time. (B) It is a 6B-6B arrow directional cross-sectional view in FIG. 5 which shows the shape of the closed cross section at the time of expansion | deployment of a cross-section expansion part. FIGS. 7 to 9 relate to the second embodiment, and FIG. 7 is an enlarged perspective view showing a reinforcing structure of the vehicle door. It is an expansion disassembled perspective view which shows the reinforcement structure of the door for vehicles. It is an expansion perspective view which shows the state which the cross-section expansion | deployment part expand | deployed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle door reinforcement structure 12 Vehicle 14 Vehicle door 18 Belt line reinforcement part 20 Vehicle door reinforcement structure 22 Inflator 24 Pipe member 26 Outer panel 28 Inner panel 30 Closed section 32 Section development part 34 End part 44 Cover 46 Coupling member

Claims (2)

The upper edge of the vehicle door extends in the vehicle front-rear direction and has a closed cross section composed of an outer panel positioned outside the vehicle and an inner panel positioned inside the vehicle, and at least one of the outer panel and the inner panel is the closed panel. A beltline reinforcing portion having a cross-section development portion that is plastically developed by being developed by the pressure of a gas supplied in the cross-section;
An inflator that is provided at an end of the beltline reinforcing portion and supplies gas into the closed section at the time of a frontal collision of a vehicle;
A pipe member disposed between the end portion and the inflator so as to reinforce the end portion of the beltline reinforcing portion whose section is narrowed in accordance with the inflator, and extends to the cross-section development portion When,
A vehicle door reinforcing structure. The upper edge of the vehicle door extends in the vehicle front-rear direction and has a closed cross section configured by an outer panel positioned on the vehicle outer side and an inner panel positioned on the vehicle inner side, and at least one of the outer panel and the inner panel is the closed cross section. A belt line reinforcing portion having a cross-section expanding portion in which the closed cross-section is expanded by plastically expanding by the pressure of the gas supplied therein;
An inflator provided at an end of the beltline reinforcing portion in a state of being covered by a cover, and supplying gas into the closed cross section at the time of a frontal collision of a vehicle;
A coupling member that couples the outer panel and the inner panel and the cover of the inflator so as to reinforce the end portion of the beltline reinforcing portion whose cross section is narrowed in accordance with the inflator;
A vehicle door reinforcing structure.

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