JP4154996B2 - Front door belt line reinforcement structure for center pillarless vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a front door belt line reinforcement structure in a so-called center pillarless vehicle, for example, for improving passenger boarding / exiting ability.
[0002]
[Prior art]
Conventionally, such a so-called center pillarless vehicle is configured, for example, as shown in FIG.
In FIG. 7, the body shell of the center pillarless vehicle 1 includes a pair of left and right rockers 2 extending in the front-rear direction along both side edges of the bottom, a front pillar 3 rising upward from the vicinity of the front end of each rocker 2, and the rear of each rocker 2. The wheel house 4 connected to the end, the rear pillar 5 rising upward from the upper part of the wheel house 4, the roof side rail 6 extending from the upper end of the front pillar 3 toward the rear pillar 5, and the upper part from the vicinity of the center of the right rocker 2 And a center pillar 7 extending to the vicinity of the center of the roof side rail 6.
[0003]
Then, on the left side of the body shell, in the door opening defined between the front pillar 3 and the rear pillar 5, in the illustrated case, a front door 8 that is swingably supported by the front pillar 3, and the rear pillar 5. And a rear door 9 supported so as to be swingable.
[0004]
By the way, in an automobile provided with center pillars on the left and right sides of the body shell, reinforcement is provided along a so-called belt line portion of the front door 8 in order to increase the rigidity of the front door 8 at the time of a side collision.
[0005]
As a result, at the time of a side collision, as shown in FIG. 8, the input from the side to the front door 8 is received by the entire belt line portion 8 a and escaped to the front pillar and the center pillar. The bending 8b with respect to the vicinity of the chest of the occupant P is suppressed.
[0006]
Further, at the time of an offset frontal collision, as shown in FIG. 9, the input from the front pillar 3 is transmitted to the center pillar via the reinforced belt line portion 8 a of the front door 8, thereby rearward of the front pillar 3. Suppress movement to.
[0007]
In this way, in a vehicle having center pillars on the left and right of the body shell, the belt line portion 8a of the front door 8 is reinforced to protect the chest of the occupant P at the time of a side collision and an offset frontal collision. Yes.
[0008]
Conventionally, a technique is known in which a beltline reinforcing member disposed along a beltline portion has a closed cross-sectional structure alone in order to protect an occupant during a collision (see Patent Document 1). ).
[0009]
[Patent Document 1]
JP 2002-219938 A (page 2-5, FIG. 2)
[0010]
[Problems to be solved by the invention]
However, in the center pillarless vehicle 1 described above, if the reinforcement is performed along the entire belt line portion 8a of the front door 8 in the same manner, the bending 8b of the front door 8 can be similarly suppressed in the case of a side collision. However, at the time of offset frontal collision, as shown in FIG. 10, even if the input from the front pillar 3 is transmitted from the belt line portion 8a of the front door 8 to the center pillar, there is no center pillar on the left side of the body shell. Therefore, the signal is transmitted to the rear door 9 via the belt line portion 8a of the front door 8.
[0011]
Therefore, an excessive input is transmitted to the rear door 9, so that the rear door 9 is deformed and adversely affects the opening of the rear door 9. In some cases, the rear door 9 cannot be opened.
[0012]
Here, when the conventional technology (see, for example, Patent Document 1) is applied to the front door 8 of the center pillarless vehicle 1, the beltline reinforcing member is increased in rigidity, thereby causing the beltline portion to collapse due to input at the time of collision. In the case of the offset frontal collision described above, excessive input is similarly transmitted to the rear door, which adversely affects the opening of the rear door.
[0013]
The present invention has been made in view of the above points, and an object of the present invention is to provide a front door belt line reinforcement structure for a center pillar-less vehicle that absorbs input from a front pillar and prevents it from being transmitted to a rear door at the time of an offset frontal collision. .
[0014]
[Means for Solving the Problems]
According to the configuration of the present invention, the above object is achieved by a pair of rockers that constitute both side edges of the bottom of the body shell, a front pillar that rises upward from the front end of each rocker, and from the front pillars to the rear on both the left and right sides. A pair of roof side rails, a center pillar that extends upward from the vicinity of the center of the locker and connected to the vicinity of the center of the roof side rail on either the left or right side, and a wheel house from the rear end of each locker A rear pillar that rises upward and is coupled to the roof side rail, and is provided with a front door and a rear door that are supported to be openable and closable with respect to a side door opening that does not have a center pillar. In the center pillarless vehicle, the belt line part of the front door is in a region other than the front end part. Characterized in that it comprises a strong member, it is achieved by the front door belt line reinforcement structure on one side center pillar-less vehicle.
[0015]
In the front door belt line reinforcement structure for the center pillarless vehicle, preferably, the belt line portion of the front door includes a fold bead in front of the reinforcement member, and the fold bead is an inner member constituting the front door. It is desirable that the panel is recessed.
[0016]
According to the present invention, at the time of an offset frontal collision, the input from the front pillar is absorbed to some extent by the deformation of the reinforcing member and the broken bead, so that all the input from the front pillar is not transmitted to the rear door. Is suppressed from being transmitted to the rear door.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.
1 to 6 show the configuration of an embodiment of a center pillarless vehicle to which a front door belt line reinforcing structure according to the present invention is applied.
In FIG. 1, a center pillarless vehicle 10 includes a body shell configured without a center pillar on the left side, a pair of left and right rockers 11 extending in the front-rear direction along both side edges of the bottom, and the front ends of the rockers 11. A front pillar 12 rising upward from the vicinity, a wheel house 13 connected to the rear end of each locker 11, a rear pillar 14 rising upward from the top of the wheel house 13, and an upper end of the front pillar 12 toward the rear pillar 14. A roof side rail 15 that extends and a center pillar 16 that extends upward from the vicinity of the center of the right rocker 11 to the vicinity of the center of the roof side rail 15 are included.
[0018]
In the door opening 20 defined between the front pillar 12 and the rear pillar 14 on the left side of the body shell, a front door 21 whose front end is swingably supported by the front pillar 12 in the illustrated case. The rear door 22 is supported so that it can be opened and closed.
[0019]
The above configuration is the same as that of the conventional center pillarless vehicle 1 shown in FIG. 7, but the center pillarless vehicle 10 according to the present invention is configured differently in the following points.
That is, as shown in FIGS. 2 to 4, the center pillarless vehicle 10 includes a reinforcing member 23 and a folded bead 24 on the belt line portion 21 a of the front door 21 attached to the opening 20 on the left side of the body shell. It is characterized by.
[0020]
As shown in FIG. 3, the reinforcing member 23 has a closed cross section S, and the cross section S is formed in an elongated pipe shape continuous in the front-rear direction of the door. The length of the reinforcing member 23 is the belt line portion shown in FIG. It is set so as to occupy a region behind the front end region 21b in the region 21a.
[0021]
Further, the reinforcing member 23 is disposed in the front door 21 as shown in FIG. Specifically, the inner panel 21c constituting the front door 21 is attached to the side of the passenger compartment by spot welding, for example. Note that reference numeral 21d in FIG. 3 denotes an outer panel of the front door 21.
[0022]
Next, the folding bead 24 is bent by so-called buckling when an input, that is, a collision force is applied from the front pillar 12 to the belt line portion 21a. The folded bead 24 is provided in the belt line portion 21a in front of the reinforcing member 23, that is, in the region of the belt line portion 21a and in front of the reinforcing member 23.
[0023]
Further, as shown in FIGS. 4A and 4B, the folded bead 24 is formed to be recessed in the inner panel 21 c of the front door 21. Such a fold bead 24 can be formed integrally with the inner panel 21c by press working when the inner panel 21c is formed.
[0024]
The center pillarless vehicle 10 according to the embodiment of the present invention is configured as described above, and the reinforcing member 23 is provided in the region 21b other than the front end portion of the belt line portion 21a of the front door 21. As shown, at the time of a side collision in which an obstacle collides with the side, an input applied to the front door 21 from the side by the obstacle is received by the entire belt line portion 21a.
[0025]
Further, at the time of an offset frontal collision, as shown in FIG. 6, the input from the front pillar 12 is transmitted to the rear door 22 through the reinforced belt line portion 21a of the front door 21, but the region of the front end portion 21b is deformed. To do.
At that time, since the belt line portion 21a includes the folding bead 24, the folding bead 24 is bent by so-called buckling due to the input from the front pillar 12 described above.
[0026]
Thus, according to the front door belt line reinforcement structure of the center pillarless vehicle 10 according to the present invention, at the time of a side collision, the deflection of the front door 21 is suppressed by the reinforcing member 23 over the entire length of the front door 21. Thereby, the chest of the passenger P inside the front door 21 can be protected.
[0027]
Further, at the time of an offset frontal collision of the center pillarless vehicle 10, the bent bead 24 is recessed in the vehicle outward direction, so that the beltline portion 21a is positively deformed in the vehicle outward direction. Thereby, a part of the input from the front pillar 12 is absorbed, and the input transmitted to the rear door 22 is reduced.
[0028]
Therefore, it is possible to prevent the rear door from being difficult to open due to the input from the front pillar 12 being transmitted to the rear door 22 and the rear door 22 being deformed during an offset frontal collision. It can be easily rescued.
[0029]
The present invention can be implemented in various forms without departing from the spirit of the invention. For example, in the above-described embodiment, the center pillarless vehicle 10 configured without the center pillar on the left side of the body shell has been described. However, the present invention is not limited thereto, and the present invention can be applied to a right center pillarless vehicle. Is clear.
[0030]
【The invention's effect】
As described above, according to the present invention, at the time of an offset frontal collision, the input from the front pillar is absorbed by the deformation of the reinforcing member and the broken bead, and the input from the front pillar is reduced and transmitted to the rear door. Thereby, it can suppress that an excessive input is transmitted to a rear door.
[0031]
Therefore, it is possible to prevent the rear door from being difficult to open due to all the input from the front pillar being transmitted to the rear door and the rear door being deformed, and the rear seat occupant of the center pillarless vehicle can be rescued easily.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a body shell of an embodiment of a center pillarless vehicle to which the present invention is applied.
2 is an enlarged side view showing a front door attached to an opening on the left side of the body shell of the center pillarless vehicle of FIG. 1. FIG.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
4A is a partially enlarged side view of a belt line portion of the front door of FIG. 2, and FIG. 4B is a cross-sectional view taken along line BB of FIG.
5 is a plan view showing the deflection of the belt line portion at the time of a side collision of the front door of FIG. 2. FIG.
6 is a plan view showing a deformation of the belt line portion at the time of an offset frontal collision of the front door of FIG. 2. FIG.
FIG. 7 is a perspective view showing a configuration example of a body shell of a conventional center pillarless vehicle.
FIG. 8 is a plan view showing a deflection of a belt line portion at the time of a side collision of a front door in a general vehicle.
FIG. 9 is a side view showing a state at the time of an offset frontal collision of a front door in a general vehicle.
10 is a side view showing a state at the time of an offset frontal collision of a front door in the center pillarless vehicle of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Center pillarless vehicle 11 Rocker 12 Front pillar 13 Wheel house 14 Rear pillar 15 Roof side rail 16 Center pillar 20 Door opening part 21 Front door 21a Belt line part 21c Inner panel 21d Outer panel 22 Rear door 23 Reinforcement member 24 Folding bead part

Claims (3)

A pair of rockers that form both side edges of the bottom of the body shell, a front pillar that rises upward from the front end of each rocker, a pair of roof side rails that extend rearward from the front pillar on both the left and right sides, and either the left or right The center pillar that extends upward from the vicinity of the center of the locker and is connected to the vicinity of the center of the roof side rail, and rises upward from the rear end of each locker via the wheel house and is connected to the roof side rail. A center pillar-less vehicle including a front door and a rear door that are supported to be openable and closable with respect to a side door opening that does not include a center pillar.
The front door belt line reinforcement structure for a center pillarless vehicle, wherein the belt line portion of the front door includes a reinforcing member in a region other than the front end portion. The front door belt line reinforcement structure for a center pillar-less vehicle according to claim 1, wherein the belt line portion of the front door is provided with a bead in front of the reinforcing member. The front door belt line reinforcement structure for a center pillarless vehicle according to claim 2, wherein the bent bead is formed by being recessed in an inner panel constituting the front door.

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