JP3432992B2 - Car body structure - 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 body structure for an automobile, and more particularly to a structure of an automobile pillar panel and a pillar garnish molding.

[0002]

2. Description of the Related Art A conventional vehicle body structure for an automobile, particularly, a structure for an automobile pillar panel and a pillar garnish molding is shown in FIGS. 11 and 12, for example.
JP-A-7-117596 and JP-A-7-2029
There is one as shown in Japanese Patent Publication.

As an upper body structure of the automobile 1 shown in FIGS. 11 and 12, a front pillar portion 3 as a "pillar panel", a center pillar portion 5 as a "pillar panel", and a "pillar panel" as well. Not shown rear pillar part, front roof rail part 4 also as "pillar panel", and also "pillar panel"
And a rear roof rail portion (not shown) also serving as a “pillar panel”.

Reference numeral 7 is a front window panel, 9 is a front side window panel, 11 is a rear side window panel, and 13 is a roof panel.

The cross section of the front pillar portion 3, the center pillar portion 5, the rear pillar portion, the front roof rail portion 4, the roof side rail portion 6 and the rear roof rail portion as a "pillar panel", for example, the cross sectional construction of the center pillar portion 5, is as follows. The center pillar outer panel 15 and the center pillar inner panel 17 are formed by joining edge portions 15a, 15b, 17a, 17b so as to form a closed cross-section structure. On the panel 17 side, for example, a center pillar garnish molding 21 as a “pillar garnish molding” made of synthetic resin is attached.

The center pillar garnish molding 21 comprises a molding body 23, first and second bottom surfaces 25 and 27, and first and second ribs 29 and 31.
A back surface 33 of the molding body 23, a first hollow portion 35 formed by the first bottom surface portion 25 and the first rib 29, a back surface 33 of the molding body 23, the second bottom surface portion 27 and the second rib. The second hollow portion 37 formed by 31 is integrally formed.

As shown in the figure, the molding body 23 extends along the vehicle interior 19 side through a predetermined space in the center pillar inner panel 17 of the center pillar portion 5 and has a substantially U-shaped cross section. It will be done.

The width dimensions of the first and second ribs 29 and 31 at the end portion on the back surface 33 side of the molding body 23 are as follows.
The first and second ribs 29, 31 are in a relationship narrower than the width dimension of the end portions of the center pillar portion 5 in contact with the center pillar inner panel 17 on the first and second bottom surface portions 25, 27 side.
Is an inclined shape that spreads toward the center pillar inner panel 17 of the center pillar portion 5 (the angle Θ is 62 ° ≦ Θ ≦ 9 with respect to the surface of the center pillar inner panel 17).
0 °).

The center pillar inner panel 1 of the center pillar portion 5 is provided on the first and second bottom surface portions 25 and 27.
A clip 43 engaged with the through hole 41 of 7 is provided,
A clip 43 engaged with the through hole 41 of the center pillar inner panel 17 is provided, and the center pillar garnish molding 21 is supported.

In such a structure, as shown in FIG. 13, the occupant, for some reason, causes the pressing main body 23 of the center pillar garnish molding 21 to press the molding body 23 of the center pillar garnish 21 with a pressing impact load F1 of a predetermined value or more.
Is applied, the molding body 23 bends.

Subsequently, as shown in FIGS. 14 to 15, the molding body 23 and the first and second ribs 2 are formed.
9 and 31 bend to deform the first and second hollow portions 35 and 37. At that time, the impact energy is absorbed.

Then, as shown in FIG. 16, the shape of the center pillar garnish molding 21 is restored by the repulsive force due to the elasticity of the molding body 23 and the first and second ribs 29 and 31.

[0013]

However, the above-mentioned FIG.
According to the conventional example shown in FIGS. 1 and 12, the pressing impact load F1 applied to the molding body 23 of the center pillar garnish molding 21 from the vehicle interior 19 side is equal to or more than a predetermined value, and the molding body of the center pillar gagarnish molding 21 is 23 and the first and second ribs 29 and 31 are absorbed by the inclination deformation (flexing deformation), the molding body 23 and the first and second ribs 29 and 31 are completely bent, and are shown in FIG. As described above, the back surface 33 of the molding body 23 is the center pillar inner panel 1 of the center pillar portion 5.
By pressing against the surface of No. 7, the absorption of the pressing impact load F1 is stopped.

Therefore, in order to increase the absorption level of the pressing impact load F1, a sufficient space 39 is provided between the surface of the molding body 23 of the center pillar garnish molding 21 and the surface of the center pillar inner panel 17 of the center pillar portion 5. I need.

That is, since the molding body 23 of the center pillar garnish molding 21 projects toward the passenger compartment 19 side with respect to the surface of the center pillar inner panel 17 of the center pillar portion 5, the passenger stays in the passenger compartment 19. There is a risk of pressure on the occupants.

Further, the molding main body 23 of the center pillar garnish molding 21 protruding toward the passenger compartment 19 may be an obstacle when getting in and out.

Further, the molding main body 23 of the center pillar garnish molding 21 protruding toward the passenger compartment 19 side may obstruct the view of the outside of the passenger compartment (not shown) from the passenger compartment 19 side, and improvement is required. .

Therefore, the present invention has been made in view of the above points, and an object thereof is to absorb energy of head impact deceleration even if the height of the front center pillar is small. To provide a good automobile body structure.

[0019]

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a pillar panel and a pillar-shaped garnish molding made of synthetic resin, which is arranged on the inside of the pillar panel in the vehicle interior. In the vehicle body structure for an automobile, including: the pillar garnish molding, a base portion facing the pillar panel and provided at a predetermined interval, and facing the pillar panel side with respect to the surface of the base portion. A plurality of first ribs are provided uprightly spaced apart from each other in the longitudinal direction of the pillar panel, and free ends thereof are formed on the surface of the pillar panel with a slight distance therebetween, and an appropriate one between the plurality of first ribs. At least one position is erected from the surface of the base portion toward the pillar panel, and the free end of the first rib is free from the surface of the pillar panel. The second rib is formed so as to be separated from the position of the end portion, and the free end portion of the second rib supports an engaging portion that engages with a through hole formed in the surface of the pillar panel. Ri Na supported by parts of the second rib
The support portion is formed by a pin that engages the base of the engagement portion.
It is characterized by

Therefore, according to the invention of claim 1, when a pressing impact load of a predetermined value or more is applied to the pillar garnish molding from the vehicle interior side, the free end portion of the first rib with respect to the pressing impact load. Collide with the surface of the pillar panel, an initial reaction force is first generated, and then the second rib or a supporting portion of the second rib is broken to reduce the initial reaction force. Since the base portion moves while it is buckled by the surface of the pillar panel to gain an energy absorption stroke until it hits the pillar panel, the energy absorption efficiency of the head impact deceleration is remarkably improved.

Further, since a large stroke is not required to absorb the impact energy, it is possible to provide a vehicle body structure for an automobile, in which the lateral dimension of the pillar panel is small.

Further, by adjusting the interval between the first ribs, it is possible to control the pressure shock load resistance value as a design value.

The supporting portion of the second rib is a base portion of the engaging portion.
Since it is easy to control to separate from the
It will be stable.

The invention described in claim 2 is the same as in claim 1.
A vehicle body structure for an automobile, wherein the second rib is the first rib.
Make it possible to break with a load smaller than the buckling resistance of the rib
It is characterized by being formed.

Therefore, according to the invention described in claim 2,
The free end of the first rib interferes with the surface of the pillar panel.
Then, the control in which the second rib breaks before the first rib buckles
It is easy to obtain stable pressure shock load values.
Will be.

[0026]

[0027]

As is apparent from the above, according to the invention of claim 1, an automobile including a pillar panel and a synthetic resin pillar garnish molding disposed on the interior side of the pillar panel. In the vehicle body structure, the pillar garnish molding includes a base portion facing the pillar panel and arranged at a predetermined interval.
A plurality of upright standing parts are formed on the surface of the base part toward the pillar panel side and spaced apart in the longitudinal direction of the pillar panel, and free ends are formed slightly separated from the surface of the pillar panel. The first rib and at least one position standing upright to the pillar panel side with respect to the surface of the base portion at an appropriate position between the plurality of first ribs, and the free end of the surface of the pillar panel. And a second rib formed to be spaced apart from the position of the free end portion of the first rib, the through hole formed in the surface of the pillar panel at the free end portion of the second rib. Since the engaging portion that engages with is supported by the supporting portion, when a pressing impact load of a predetermined value or more is applied to the pillar garnish molding from the vehicle interior side, the pressing impact load is Self of the first rib The initial reaction force is first generated by the end portion colliding with the surface of the pillar panel, and the initial reaction force is reduced by the fracture of the second rib or the supporting portion of the second rib. While one rib is buckled by the surface of the pillar panel, the energy absorption stroke of the head impact deceleration is significantly improved because the energy absorption stroke is earned until the base portion moves and hits the pillar panel. .

Further, since a large stroke is not required to absorb the impact energy, it is possible to provide a vehicle body structure in which the lateral dimension of the pillar panel is small.

Further, by adjusting the interval between the first ribs, it is possible to control the pressure resistance against impact load as a design value.

The supporting portion of the second rib is the base portion of the engaging portion.
Since it is easy to control to separate from the
It will be stable.

According to the invention described in claim 2, the second
The rib breaks with a load smaller than the buckling resistance of the first rib.
Characterized by being formed to be possible
In addition to the effect of claim 1, the freedom of the first rib
The end of the pillar interferes with the surface of the pillar panel so that the first rib is seated.
Since it is easy to control the second rib to break before bending,
A pressure resistance against impact load can be stably obtained.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 10 show an automobile body structure according to a first embodiment of the present invention.

That is, as a vehicle body structure for an automobile, particularly an upper body structure of the automobile 1, a "pillar panel" shown in FIG.
, A center pillar part 5 as a “pillar panel”, a rear pillar part not shown as a “pillar panel”, a front roof rail part 4 as a “pillar panel”, and a “pillar panel” as well. Side roof rail part 6 as "panel"
And a rear roof rail portion (not shown) also serving as a “pillar panel”, and the front window panel 7, the front side window panel 9, the rear side window panel 11, and the roof panel 13 are the same as in the conventional example.

Further, a cross section of the front pillar portion 3, the center pillar portion 5, the rear pillar portion, the front roof rail portion 4, the roof side rail portion and the rear roof rail portion as the above-mentioned "pillar panel", for example, a cross section of the center pillar portion 5. As shown in FIG. 12, the edge portion 15a, the center pillar outer panel 15 and the center pillar inner panel 17 form a closed cross-section structure as shown in FIG.
It is also the same as the conventional example that it is configured by joining 15b, 17a and 17b together.

A center pillar garnish molding 51 as a "pillar garnish molding" made of, for example, a synthetic resin is attached to the vehicle interior 19 side, that is, the center pillar inner panel 17 side.

The center pillar garnish molding 51 is, as shown in FIGS. 1 to 4, a base having a flat plate-like section which is arranged facing the center pillar inner panel 17 of the center pillar portion 5 at a predetermined interval. Part 5
3 and the surface 53a of the base portion 53 on the center pillar inner panel 17 side of the center pillar 5 toward the center pillar inner panel 17 side of the center pillar portion 5 and the longitudinal direction of the center pillar portion 5 ( A plurality of them are erected separately in the vertical direction) and the free end 55
a is a first rib 55 formed on the surface of the center pillar inner panel 17 of the center pillar portion 5 with a slight distance therebetween, and the base portion at an appropriate position between the plurality of first ribs 55, 55 ... At least one position (two upper and lower positions in this embodiment) is erected on the surface 53a of the center pillar portion 5 toward the center pillar inner panel 17 side of the center pillar portion 5 and the free end portion 57a of the center pillar portion 5 is provided. A second rib 57 is formed so as to be separated from the surface of the center pillar inner panel 17 from the position of the free end portion 55a of the first rib 55.

The second rib 57 is formed so that it can be broken with a load smaller than the buckling resistance of the first rib 55.

The free end portion 57a of the second rib 57 of the center pillar garnish molding 51 serves as an engaging portion that engages with the through hole 59 formed in the surface of the center pillar inner panel 17 of the center pillar portion 5. The clip 61 is supported by the support portion 63.

The support portion 63 of the second rib 57 is provided with a pin 65 projectingly engaged with the hole 61b of the base portion 61a of the clip 61.

Pillar garnish molding 5
One of the base portion 53, the first rib 55, and the second rib 57 are integrally formed.

Because of the configuration of the above first embodiment,
As shown in FIG. 5, the occupant makes a secondary collision with the base portion 53 of the pillar garnish molding 51.
When a pressing impact load F1 of a predetermined value or more (for example, 900 kg when the weight of the occupant's head is 4.5 kg is 200 kg) is applied from the passenger compartment 19 side, the first impact is applied to the pressing impact load F1. When the free end portion 55a of the rib 55 hits the surface of the center pillar inner panel 17 of the center pillar portion 5, an initial reaction force 71 is first generated as shown in FIG.

Next, as shown in FIG. 7, the second rib 5 is formed.
7 itself is broken, or the base portion 61a of the clip 61 is broken from the pin 65 of the support portion 63 of the second rib 57,
Alternatively, when both of them occur at the same time, the initial reaction force 71 decreases as shown in FIG.

Then, as shown in FIG. 9, the free end portion 55a of the first rib 55 is buckled by the surface of the center pillar inner panel 17 of the center pillar portion 5 while the base portion 53 moves, By hitting the surface of the center pillar inner panel 17 of the center pillar part 5,
As shown in FIG. 10, the reaction force 73 increases again and is subsequently attenuated, so that the energy absorption stroke can be earned.

Therefore, the energy absorption efficiency of the head impact deceleration is remarkably improved.

Further, since a large stroke is not required to absorb impact energy, it is possible to provide a vehicle body structure for an automobile in which the right and left dimensions of the center pillar portion 5 are small.

Further, by adjusting the interval between the first ribs 55, 55, it becomes possible to control the pressure-resistant impact load value F1 as a design value.

The free end portion 55a of the first rib 55 is also provided.
Before the first rib 55 buckles due to the interference with the surface of the center pillar inner panel 17 of the center pillar portion 5,
Since it is easy to control the second ribs 57 to break, the pressure shock resistance load value can be stably obtained.

Further, since it is easy to control the supporting portion 63 of the second rib 57 from the base portion 61a of the clip 61, the pressure resistant impact load value can be stably obtained.

As described above, even if the lateral dimension of the pillar panel is small, there is a practical effect that the vehicle body structure for an automobile has good energy absorption efficiency of head impact deceleration and excellent formability.

[Brief description of drawings]

FIG. 1 is a side view illustrating a vehicle body structure for an automobile according to a first embodiment of the present invention.

FIG. 2 is an explanatory cross-sectional view taken along the line SA-SA in FIG.

FIG. 3 is a back side explanatory view taken along the arrow B of FIG.

FIG. 4 is an enlarged explanatory view showing a clip as an engaging portion.

5 is an explanatory cross-sectional view showing a situation in which a pressing impact load is applied in the state of FIG.

FIG. 6 is a diagram showing a correlation between an elapsed time from an impact and a head deceleration in the state shown in FIG. 5 according to the first embodiment of the present invention.

7 is a cross-sectional explanatory view showing a situation in which a pressing impact load is further applied from FIG.

FIG. 8 is a diagram showing a correlation between an elapsed time from an impact and a head deceleration in the state shown in FIG. 7 according to the first embodiment of the present invention.

9 is a cross-sectional explanatory view showing a situation in which a pressing impact load is further applied from FIG. 7.

FIG. 10 is a diagram showing the correlation between the elapsed time from an impact and the head deceleration in the state shown in FIG. 9 according to the first embodiment of the present invention.

FIG. 11 is a schematic view showing a vehicle body upper structure of a conventional example. .

12 is a perspective view including a cross section taken along line CC of FIG.

FIG. 13 is a cross-sectional explanatory view showing a situation before a pressing impact load is applied in the state of FIG. 12;

14 is a cross-sectional explanatory view showing a situation in which a pressing impact load is applied in the state of FIG.

15 is a cross-sectional explanatory view showing a situation in which a pressing impact load is further applied from FIG.

FIG. 16 is a cross-sectional explanatory diagram showing the state of shape restoration.

[Explanation of symbols]

1 Car 3 Front pillar part as "pillar panel" 4 Front roof rail part as "pillar panel" 5 Center pillar part as "pillar panel" 6 Side roof rail part as "pillar panel" 15 Center pillar outer panel 17 Center pillar inner Panel 19 Vehicle interior 51 Center pillar garnish molding as "pillar garnish molding" 53 Center pillar garnish molding base 55 Center pillar garnish molding No. 1
Rib 55a Free end 57 of the first rib 57 Second rib 57a of the center pillar garnish molding 57a Free end 59 of the second rib 59 Through hole 61 Clip 61a as an engaging portion Clip base 63 Support 65 Pin 71 Initial reaction force F1 Pressing impact load above a specified value

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Motoko Komatsu 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Satoshi Ichikawa 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Tetsuo Maki 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. (56) Reference JP-A-8-58507 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60R 21/02-21/04 B60R 13/02 B62D 25/04

Claims (2)

(57) [Claims] 1. A vehicle body structure for an automobile, comprising: a pillar panel; and a pillar garnish molding made of synthetic resin, the pillar garnish molding being disposed inside the pillar panel, the pillar garnish molding facing the pillar panel. And a plurality of free end portions are provided while a plurality of base portions are provided at a predetermined interval, and a plurality of them are erected from the surface of the base portion toward the pillar panel side and spaced apart in the longitudinal direction of the pillar panel. First ribs formed on the surface of the pillar panel at a slight distance from each other, and at least one place standing upright toward the pillar panel with respect to the surface of the base portion at an appropriate position between the plurality of first ribs. A second rib which is provided and whose free end is spaced apart from the surface of the pillar panel from the position of the free end of the first rib. The free ends of the ribs, the engaging portion engaged with the through hole formed on the surface of the pillar panel Ri name supported by the support portion, the support portion of the second rib, the base of the engaging portion Pins to engage
Car body structure characterized by being formed by
Structure. 2. The vehicle body structure for an automobile according to claim 1, wherein the second rib is formed so as to be rupturable with a load smaller than a buckling resistance of the first rib. Car body structure for automobiles.