JP3446655B2 - B pillar lower structure for vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle B-pillar lower structure, and more particularly to a vehicle B-pillar lower structure used in a vehicle such as an automobile having a front side door having an impact beam.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No. 9-263126 discloses an example of a vehicle B pillar lower structure used for a vehicle such as an automobile having a front side door having an impact beam.

As shown in FIG. 7, in this vehicle B-pillar lower structure, an impact beam (also referred to as a guard bar) 72 is provided inside the front side door 70, and the front side door 70 is closed. B in the state
Reinforcement across the pillar (also referred to as sensor tapilla) 74 and the pillar overlapping edge portion 70A overlapping in the vehicle width direction, and the rocker (also referred to as side sill) 76 in the door closed state and the rocker overlapping edge portion 70B overlapping in the vehicle width direction. 78 is provided. In addition, the impact beam 72 passes through the vicinity of a portion of the outer panel of the front side door 70 that is inflated to the outermost side of the vehicle, and extends rearwardly with an inclination toward the rear end portion 72A. It is fixed to.

[0004]

However, in such a vehicle B-pillar lower structure, since the front side door 70 is generally weaker than the B-pillar 74, a collision of another vehicle or the like from the side of the vehicle body, a so-called side collision. At some times, the front side door 70 is deformed as shown by the chain double-dashed line in FIG. 8, and the lower portion of the front side door 70 enters the passenger compartment relative to the B pillar 74. In this case, as shown in FIGS. 9A to 9D, the rear end portion 72A of the impact beam 72 comes into contact with the B pillar 74 via the inner panel 70A of the front side door 70, so that the B pillar 74 and The hinge bracket 80 is inclined toward the vehicle interior, and the rear end portion 72A of the impact beam 72 is located at the front side door 7.
It moves upward along the B pillar 74 integrally with the inner panel 70A of No. 0. As a result, the load input position from the impact beam 72 to the B pillar 74 shifts upward, so that the B pillar 74 cannot be sufficiently bent at the intended bending position (the lower part of the B pillar 74), and sufficient energy absorption is achieved. No effect. In order to improve this, the reinforcing member 82, which is conventionally arranged in the belt line portion of the B pillar 74, is extended downward to prevent the B pillar 74 from being bent above the intended bending position. However, in this case, extending the reinforcing member 82 downward causes a large increase in weight.

In view of the above facts, it is an object of the present invention to provide a vehicle B-pillar lower structure capable of surely bending the B-pillar at an intended bending position without causing a large increase in weight. .

[0006]

The present invention according to claim 1 is a B pillar lower structure for a vehicle in which an impact beam extending substantially in the front-rear direction is arranged in a front side door, and is outside the vehicle compartment below the B pillar. is disposed on a side surface, a front end portion have a rear side door hinge overlapping at the rear end and the vehicle body longitudinal direction of the impact beam, at least in the overlapping position, the side collision Inpa
The rear end of the beam is the front end of the rear side door hinge.
The axis of the impact beam is located below the lower surface of the rear side door hinge so as to move toward the vehicle interior below the lower surface of the portion.

Therefore, in the event of a side collision, when the impact beam moves together with the side door toward the interior of the vehicle, the front end portion is below the lower surface of the rear side door hinge where the rear end portion of the impact beam overlaps in the vehicle longitudinal direction. in the rear end portion cabin side of the impact beam
To contact the B-pillar through the vehicle interior side of the front side door. As a result, even if the rear end of the impact beam tries to move upward along the B pillar, this movement can be suppressed by the front end of the rear side door hinge. Therefore, the B pillar can be reliably bent at the intended bending position located below the rear side door hinge attachment portion without a large increase in weight as in the conventional structure. Further, since the B pillar can be reliably bent at a portion having a relatively large cross-sectional area located below the rear side door hinge mounting portion, the energy absorption amount can be increased and a side impact detection sensor can be provided at the lower portion of the B pillar. When provided, the side collision detection sensor can be reliably operated.

According to a second aspect of the present invention, there is provided a vehicle B-pillar lower structure in which a front-side door is provided with an impact beam extending substantially in the front-rear direction. The front end portion is disposed on a rear side door hinge extending to a position in front of the rear end portion of the impact beam and a side surface inside the vehicle interior of the lower portion of the B pillar, and the lower end portion overlaps with the rear portion of the impact beam in a side view. A rear side door hinge bracket extending downwardly to a position, and at a site facing the front end of the rear side door hinge bracket, at the time of a side collision.
The rear end of the impact beam is the rear side door hinge.
Moves toward the passenger compartment below the lower surface of the front end of the engine
Thus, the axis of the impact beam is located below the lower surface of the rear side door hinge and above the lower surface of the rear side door hinge bracket.

Therefore, when the impact beam moves toward the vehicle interior together with the side door, the rear side door hinge extending to a position forward of the rear end of the impact beam is located at a portion facing the front end of the rear side door hinge bracket. In a region below the lower surface, the rear end of the impact beam moves toward the vehicle interior and contacts the B pillar via the vehicle interior side of the front side door. As a result, even if the rear end portion of the impact beam tries to move upward along the B pillar, this movement can be suppressed by the forward extending portion of the rear side door hinge.
Therefore, the B pillar can be reliably bent at the intended bending position located below the rear side door hinge mounting portion without a large increase in weight as in the conventional structure. Further, since the B pillar can be reliably bent at a portion having a relatively large cross-sectional area located below the rear side door hinge attachment portion, the energy absorption amount can be increased and a side collision detection sensor can be provided below the B pillar. When provided, the side collision detection sensor can be reliably operated. Further, since the axis of the impact beam is located above the lower surface of the rear side door hinge bracket, movement of the rear end of the impact beam toward the vehicle interior can be suppressed by the lower portion of the rear side door hinge bracket.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION One embodiment of a vehicle B-pillar lower structure according to the present invention will be described with reference to FIGS.

The arrow UP in the figure indicates the vehicle upward direction, the arrow FR in the figure indicates the vehicle front direction, and the arrow IN in the figure.
Indicates the direction inward of the vehicle width.

As shown in FIG. 5, in the vehicle B-pillar lower structure according to this embodiment, a front door opening 10A and a rear door opening 10B are provided on the side of the body 10 of the automobile.
The front side door 12 is attached to the front door opening 10A by hinges 14 and 16 so as to be openable and closable. Also, the rear door opening 10
A rear side door 18 is attached to B by hinges 20 and 22 so as to be openable and closable.

Bumper 2 inside front side door 12
A cylindrical impact beam 26, which is inclined rearward and downward, is disposed at substantially the same height as 4 along the front-rear direction of the vehicle body.

As shown in FIG. 4, the impact beam 2
The rear end portion 26A of 6 is fixed to the inner panel 30 of the front side door 12 via a bracket 28.
In addition, a B pillar portion 36 is erected upward in a substantially central portion in the front-rear direction of a rocker portion 34 of the side member 32 that constitutes a side portion of the vehicle body, and a B pillar portion 36 is provided at a lower portion of the lower portion of the B pillar portion 36. The hinge 22 is fixed. Hinge 22
The cross-sectional shape of the B-pillar side mounting portion 22A viewed from the front-rear direction is a rectangular shape having the up-down direction as the longitudinal direction, and the through-holes 38, 40 are formed at predetermined intervals in the front-rear direction. . Attachment holes 42 and 44 are formed in the portion of the B pillar portion 36 facing the through holes 38 and 40. A rear door hinge bracket 46 is provided on the side surface of the B-pillar portion 36 in the vehicle compartment. Through holes 48 and 50 are formed in the rear door hinge bracket 46 at predetermined intervals in the front-rear direction. ing. The screw portions 52A of the bolt 52 are inserted into the through holes 38 and 40 of the hinge 22 from the outside of the vehicle compartment. The screw portions 52A are formed in the mounting holes 42 and 44 and the through holes 48 and 50 of the rear door hinge bracket 46, respectively. Insert, rear door hinge bracket 4
6 is screwed into a nut 54 arranged on the inner surface of the vehicle compartment. A B-pillar reinforcement 56 is provided on the side of the vehicle interior side of the B-pillar portion 36 of the side member 32.

As shown in FIG. 1, the impact beam 2
The rear end portion 26A of 6 is the mounting portion 2 of the hinge 22 on the B pillar side.
The front end portion 22B of 2A and the front end portion 22B overlap each other in the front-rear direction of the vehicle body, and the overlap amount L is obtained. Also,
The lower portion 46A of the rear door hinge bracket 46 is extended downward to a position overlapping the rear end portion 26A of the impact beam 26 in a side view, and the vertical width W1 of the rear door hinge bracket 46 is the same as that of the hinge 22.
Wider than the vertical width W2 of the pillar-side mounting portion 22A (W1> W
2) It is set. Further, the front end 46B of the rear door hinge bracket 46 extends forward of the vehicle body from the front end 22B of the B-pillar side mounting portion 22A.

As shown in FIG. 1, at the position corresponding to the front end 46B of the rear door hinge bracket 46, as shown in FIG.
As shown in FIG.
The axis P at is set within a region S between the lower surface 22C of the hinge 22 and the lower surface 46C of the rear door hinge bracket 46. Therefore, at the time of a side impact, the impact beam 2
When the rear end portion 26A of No. 6 moves toward the vehicle interior (arrow A in FIG. 3), the rear end portion 26A of the impact beam 26 approaches the rear door hinge bracket 46 below the lower surface 22C of the hinge 22. It is supposed to do. Reference numeral 58 shown in FIGS. 2 and 3 indicates an outer panel of the front side door 12.

Next, the operation of this embodiment will be described.

In the present embodiment, when a bumper or the like of another vehicle comes into contact with the outer panel 58 of the front side door 12 and a load acts on the impact beam 26, the impact beam 26 moves inward with the front side door 12. In this case, as shown in FIG. 3, the impact beam 26 is formed at a portion below the front end lower surface 22C of the rear side door hinge 22 extending forward to a position overlapping the rear end 26A of the impact beam 26.
The rear end portion 26A contacts the B pillar portion 36 via the inner panel 30.

As a result, even if the rear end portion 26A of the impact beam 26 tries to move upward (in the direction of arrow B in FIG. 3) along the B pillar portion 36, this movement is suppressed by the front end portion 22B of the rear side door hinge 22. be able to. Therefore, the B-pillar portion 36 can be reliably bent at the intended bending position located below the B-pillar side attachment portion 22A of the rear side door hinge 22 without a large increase in weight as in the conventional structure. Further, since the B pillar can be reliably bent at a portion having a relatively large cross-sectional area, which is located below the mounting portion of the rear side door hinge 22, the amount of energy absorbed can be increased and a side collision can be detected at the bottom of the B pillar. When the sensor is provided, the side collision detection sensor can be reliably operated. Further, the movement of the rear end portion 26A of the impact beam 26 toward the vehicle interior can be suppressed by the lower portion 46A of the rear side door hinge bracket 46 extending to the vehicle interior side portion of the axis P of the impact beam 26. .

In the above, the present invention has been described in detail with respect to specific embodiments, but the present invention is not limited to such embodiments, and various other embodiments within the scope of the present invention. It is obvious to a person skilled in the art that For example, in the above-described embodiment, the cross-sectional shape of the B-pillar side attachment portion 22A of the hinge 22 viewed from the front-rear direction is a rectangular shape having the up-down direction as the longitudinal direction, but instead of this, as shown in FIG. By forming the projection 22D toward the outside of the vehicle compartment at the lower portion of the front end portion 22B of the hinge 22, even if the outer diameter of the rear end portion 26A of the impact beam 26 is large, the rear end portion 26A of the impact beam 26 is large. The protrusion 22D may be configured to reliably suppress the upward movement of the.

In the above embodiment, the impact beam 26 has a cylindrical shape, but the impact beam 26 is not limited to a cylindrical shape and may have another shape such as a rectangular tube shape.

In the above embodiment, the hinge 22 is extended forward so that the hinge 22 and the impact beam 26 overlap each other in the front-rear direction. Instead, the impact beam 26 is extended rearward. The hinge 22 and the impact beam 26 may overlap in the front-rear direction.

[0023]

The present invention as set forth in claim 1 is a vehicle B pillar lower structure in which an impact beam extending substantially in the front-rear direction is provided in the front side door, and is provided on the vehicle cabin outer surface under the B pillar. is, Riyasa the front end overlaps the rear portion and the vehicle body longitudinal direction of the impact beam
Have a Idodoahinji, at least overlapping position, the rear end of the impact beam side collision is rear side
Moved to the inside of the vehicle below the lower surface of the front end of the door hinge.
Since the axis of the impact beam is located below the lower surface of the rear side door hinge so as to move, the B-pillar can be reliably bent at the intended bending position without a large increase in weight. Have.

According to a second aspect of the present invention, there is provided a vehicle B-pillar lower structure in which an impact beam extending substantially in the front-rear direction is arranged in a front side door, and the B-pillar lower portion is arranged on a vehicle cabin outer side surface below the B-pillar. A rear side door hinge whose front end extends to a position in front of the rear end of the impact beam, and a vehicle interior side surface under the B-pillar, the lower end of which overlaps with the rear of the impact beam in a side view. And a rear side door hinge bracket extending downward, and at a portion facing the front end of the rear side door hinge bracket , an impact bead is generated when a side collision occurs.
Rear end of the door is lower than the front end of the rear side door hinge.
The axis of the impact beam is located below the lower surface of the rear side door hinge so that it moves toward the vehicle interior below.
Further, since it is located above the lower surface of the rear side door hinge bracket, it has an excellent effect that the B pillar can be reliably bent at the intended bending position without a large increase in weight. Further, there is an excellent effect that the rear side door hinge bracket can restrain the movement of the rear end portion of the impact beam toward the vehicle interior.

[Brief description of drawings]

FIG. 1 is a side view showing a main part of a vehicle B-pillar lower structure according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a cross-sectional view corresponding to FIG. 2, showing a modified state of the vehicle B-pillar lower structure according to the embodiment of the present invention.

FIG. 4 is an exploded perspective view of an essential part of the vehicle B-pillar lower structure according to the embodiment of the present invention, as seen from the vehicle diagonally front outside.

FIG. 5 is a perspective view of a vehicle to which the vehicle B-pillar lower structure according to the embodiment of the present invention is applied, as seen from an obliquely front outside of the vehicle.

FIG. 6 is a sectional view corresponding to FIG. 2, showing a vehicle B-pillar lower structure according to another embodiment of the present invention.

FIG. 7 is a schematic side view showing a conventional vehicle B-pillar lower structure.

FIG. 8 is a perspective view showing a vehicle to which a conventional vehicle B-pillar lower structure is applied.

9 (A) to 9 (D) are operation explanatory views of a conventional vehicle B-pillar lower structure.

[Explanation of symbols]

10 body 12 Front side door 18 Rear side door 22 Hinge 22A Hinge B-pillar side mounting part 22B B-pillar side mounting part front end 22C Hinge bottom surface 26 Impact Beam 26A Impact beam rear end 30 Front side door inner panel 32 side members 34 Side member rocker 36 B-pillar part of the side member 46 Rear door hinge bracket 46A Bottom of rear door hinge bracket 46B Front end of rear door hinge bracket Lower surface of 46C rear door hinge bracket

Claims (2)

(57) [Claims] 1. A vehicle B pillar lower structure in which an impact beam extending substantially in the front-rear direction is disposed in a front side door, the structure being disposed on a vehicle cabin outer side surface below the B pillar, and a front end portion of the impact beam. It has a rear side door hinge overlapping at the rear end and the longitudinal direction of the vehicle body, at least in the overlapping position, the side collision impact
The rear end of the beam is below the front end of the rear side door hinge.
A B-pillar lower structure for a vehicle, wherein an axis of the impact beam is located below a lower surface of the rear side door hinge so as to move toward a vehicle interior below the surface. 2. A B-pillar lower structure for a vehicle, wherein an impact beam extending substantially in the front-rear direction is provided in a front side door, the structure being provided on an outer surface of a vehicle interior of a lower portion of the B-pillar, and a front end portion of the impact beam. The rear side door hinge is extended to a position forward of the rear end, and the rear side door hinge is disposed on a side surface of the passenger compartment below the B pillar. The lower end is extended downward to a position where the lower end overlaps with the rear portion of the impact beam in a side view. A rear side door hinge bracket, and the impact beam at the time of a side collision at a portion facing the front end of the rear side door hinge bracket.
The rear end of the rear side door hinge is lower than the lower surface of the front end.
The vehicle B-pillar lower structure, characterized in that the axis of the impact beam is located below the lower surface of the rear side door hinge and above the lower surface of the rear side door hinge bracket so as to move inward toward the vehicle interior. .