JPH0740744A - Side door structure - Google Patents

Abstract

PURPOSE:To reduce the colliding speed of the shoulder and the brest of an occupant to the side door. CONSTITUTION:A front side-door 12 has a front side-door outer panel 26 and a front side-door inner panel 28. To the front side-door outer panel 26, a door outer reinforcement 30 forming a closed section structure 32 along a belt line 20 is provided. At the lower side of the door outer reinforcement 30, an impact beam 34 is provided, and a reinforcement 36 is provided between the impact beam 34 and the closed section structure 32. And, at the lower side of the front side-door 12, the the interval between the front side-door outer panel 26 and the front side-door inner panel 28 is made wider than the interval between the reinforcement 36 and the front side-door inner panel 28, and a clearance 35 is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile side door structure for absorbing a shock load in a side collision.

[0002]

2. Description of the Related Art Conventionally, there is a side door of an automobile, which is provided with a reinforcing member in the side door in order to protect an occupant from a side collision, that is, a side collision. It is disclosed in Japanese Patent Laid-Open No. 3-45421.

As shown in FIG. 7, this side door 70
Then, reinforcing members 76 and 78 made of laminated steel plates are provided on the surfaces of the side door outer panel 72 and the side door inner panel 74, which face each other, respectively,
At the time of a side collision, as shown in FIG. 8, the reinforcing member 76 provided on the side door outer panel 72 side comes into contact with the reinforcing member 78 provided on the side door inner panel 74 side, and the initial rigidity of the side door 70 is increased. It is possible to relatively reduce the instantaneous entry speed of the side door 70 with respect to the occupant 82 seated on the seat 80. That is, there is always a small space 86 (see FIG. 7) between the reinforcing members 76 and 78 that allows the door glass 84 to move up and down, but at the time of a side collision, the reinforcing member 76 is deformed inward, The mountain portion 76A of the reinforcing member 76 is
The side door outer panel 72 and the side door inner panel 74 are integrated by directly contacting the mountain portion 78A of the reinforcing member 78.

[0004]

However, in this side door structure, as shown in FIG.
The bumper 83A of the other vehicle 83 is the lower portion 70A of the side door 70.
Therefore, the peak portion 76A of the reinforcing member 76 first contacts the peak portion 78A of the reinforcing member 78 in the lower portion 70A of the side door 70 prior to the portion from the middle portion to the upper portion of the side door 70. Therefore, the lower portion 70A of the side door 70 moves to the waist portion 82A side of the occupant 82 prior to the portion from the middle portion to the upper portion of the side door 70.

Therefore, the occupant 82 rotates in the direction of the side door 70 (direction of arrow G in FIG. 8) around the waist part 82A as a fulcrum by the load applied to the inside of the vehicle (direction of arrow F in FIG. 8) to the waist 82A. However, when the rotation speed increases, the shoulder portion 82B and the chest portion 82C collide with the belt line portion 92 near the belt line 90 of the side door inner panel 74.

In consideration of the above facts, an object of the present invention is to provide a side door structure capable of reducing the collision speed of the shoulder and chest of the occupant with the side door.

[0007]

A side door structure according to the present invention includes a side door inner panel forming an inner portion of a side door, a side door outer panel forming an outer portion of the side door, and a side door outer panel of the side door outer panel. Between the side door outer panel and the side door inner panel, which is arranged along the belt line inside and forms a closed cross-sectional structure extending in the front-rear direction with the side door outer panel, and the side door outer panel and the side door inner panel which are arranged below the door outer reinforcement. Extending in the vehicle front-rear direction and a reinforcing member for suppressing the deformation of the side door outer panel toward the inside of the vehicle, and provided at an intermediate portion in the vehicle front-rear direction between the side door outer panel and the side door inner panel, and both ends of the door outer reinforcement. And a side connected to the reinforcing member, respectively. A reinforcement member that absorbs a shock acting from the outside of the vehicle to the inside of the vehicle due to deformation by making the distance between the inner panel and the side door outer panel and the side door inner panel narrower than the distance formed below the reinforcing member between the side door outer panel and the side door inner panel, It is characterized by having.

[0008]

In the side door structure according to the present invention, at the time of a side collision, for example, when the bumper of another vehicle collides with the lower portion of the front side door, the space between the side door outer panel and the side door inner panel becomes lower at the lower portion of the side door. Since the distance between the reinforcing member and the side door inner panel is wider, the side door outer panel is easily recessed toward the side door inner panel side.Next, the part above the bumper of the other vehicle is the middle part of the front side door. When abutting on the parts reaching the upper part,
The reinforcing member moves to the side door inner panel side together with the side door outer panel. As a result, the reinforcing member connected to the reinforcing member moves to the side door inner panel side and abuts the side door inner panel directly or through the windshield, etc., and the impact acting from the outside of the vehicle to the inside of the vehicle is prevented. While absorbing, the parts from the middle part to the upper part of the side door inner panel are moved inward of the vehicle.

Therefore, in this side door structure, at the time of a side collision, when the lower portion of the side door inner panel is pressed by the lower portion of the side door outer panel to move inward of the vehicle,
Without being extremely delayed, the vehicle front-rear direction intermediate portion from the middle portion to the upper portion of the side door inner panel moves inward of the vehicle. That is, the upper part and the middle part of the side door inner panel move inward in the vehicle width direction with respect to the lower part. Therefore, before the rotational speed in the side door direction with the waist of the occupant as a fulcrum increases, the shoulder and chest of the occupant are reinforced by a reinforcing member in the vehicle front-rear direction intermediate portion from the middle portion to the upper portion of the side door inner panel. Since the vehicle reaches the provided portion, the collision speed of the shoulder and chest of the occupant can be reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the side door structure of the present invention will be described with reference to FIGS.

In the figure, an arrow IN indicates a vehicle width direction inner direction, an arrow FR indicates a vehicle front, and an arrow UP indicates a vehicle upper side.

As shown in FIG. 4, when the occupant 18 is seated on the front seat, the vicinity of the shoulder portion 18A of the occupant 18 is located near the belt line portion 20 of the front side door 12.

As shown in FIG. 1, the front side door 12 includes a front side door outer panel 26 which constitutes the vehicle outer side portion of the front side door 12 and a front side door inner which constitutes the vehicle interior side portion of the front side door 12. And a panel 28. The belt line portion 2 is provided on the inner side of the front side door outer panel 26.
A door outer reinforcement 30 is arranged along the line 0. An upper edge portion 30A of the door outer reinforcement 30 is fixed to an upper edge portion 26A of the front side door outer panel 26 by a femming process. A lower portion of the door outer reinforcement 30 is bent toward the front side door outer panel 26 side and serves as a lower surface 30B. A tip portion of the lower surface 30B is bent downward to form a flange 30C, and the flange 30C is fixed to the front side door outer panel 26.

Therefore, the door outer reinforcement 30
And the front side door outer panel 26 form a closed cross-section structure 32 that extends in the vehicle front-rear direction along the belt line portion 20.

As shown in FIG. 4, below the door outer reinforcement 30, an impact beam 34 as a reinforcing member for reducing deformation of the front side door outer panel 26 toward the front side door inner panel 28 is provided in the front and rear of the vehicle. The impact beam 34 is arranged along the direction, and the front end portion 34A and the rear end portion 34B of the impact beam 34 are fixed to the front portion and the rear portion of the front side door 12, respectively.

As shown in FIG. 1, the impact beam 3
4 is located slightly above the site where the bumper 54A of the other vehicle 54 comes into contact during a side collision, and is located close to the front side door outer panel 26 between the front side door outer panel 26 and the front side door inner panel 28. Are arranged. Further, a reinforcement 36 as a reinforcing member is provided between the impact beam 34 and the closed cross-section structure 32, and below the impact beam 34 between the front side door outer panel 26 and the front side door inner panel 28. Has a gap 35 formed therein. Therefore, the distance between the reinforcement 36 and the front side door inner panel 28 is set to the distance between the front side door outer panel 26 and the front side door inner panel 2.
8 is narrower than the gap formed below the impact beam 34.

As shown in FIG. 4, the reinforcement 36 includes an upper arm portion 18B of the occupant 18 in the middle portion of the vehicle front-rear direction.
It is provided at a position facing.

As shown in FIG. 3, the reinforce 36 is an outer reinforce 38 which constitutes the front side door outer panel 26 side of the reinforce 36.
And an inner reinforcement 40 constituting the front side door inner panel 28 side of the reinforcement 36. The outer reinforcement 38 has a rectangular plate shape. A mounting portion 38A extends from the center of the lower end portion of the outer reinforcement 38 toward the impact beam 34. The mounting portion 38A is fixed to the outer peripheral portion of the impact beam 34 on the front side door outer panel 26 side by welding or the like. There is. Further, the upper edge portion 38B of the outer reinforcement 38 is fixed to the flange 30C of the door outer reinforcement 30 by welding or the like.

The inner reinforcement 40 has a hat-shaped cross-sectional shape when viewed from the vehicle front-rear direction, and the upper flange 40A has an upper edge portion 38 of the outer reinforcement 38.
The lower flange 40B is fixed to the lower end edge portion 38C of the outer reinforcement 38.

Therefore, the reinforce 36 is an outer reinforce 38 and an inner reinforce 40, and extends in the front-rear direction to form a closed cross-section structure 42 having the thickness direction (shock absorbing direction) as the vehicle width direction. When the closed cross-section structure 42 is crushed, the shock is absorbed.

The rear side door has the same structure as the front side door 12. 1 and 2
Reference numeral 25 indicates a door glass.

Next, the operation of this embodiment will be described. In the side door structure of this embodiment, as shown in FIG.
For example, when the bumper 54A of the other vehicle 54 collides with the lower portion of the front side door 12, the distance between the front side door outer panel 26 and the front side door inner panel 28 at the lower portion of the front side door 12 becomes larger than the reinforcement 36 and the front side door. Since the gap 35 is formed wider than the inner panel 28, the front side door outer panel 26 is easily recessed toward the front side door inner panel 28 side, and next, above the bumper 54A of the other vehicle 54. When the portion 54B comes into contact with a portion from the middle portion to the upper portion of the front side door 12, the impact beam 34 moves to the front side door inner panel 28 side together with the front side door outer panel 26. As a result, the reinforcement 36 connected to the impact beam 34 moves to the front side door inner panel 28 side, contacts the front side door inner panel 28 via the window glass 25, and acts from the outside of the vehicle to the inside of the vehicle. While the impact is absorbed by the crushing of the reinforcement 36, the portion from the middle portion to the upper portion of the front side door inner panel 28 is moved inward of the vehicle.

Therefore, in this side door structure, at the time of a side collision, the lower part of the front side door inner panel 28 is
When the vehicle is pushed inward by the lower portion of the front side door outer panel 26 and moves inwardly of the vehicle, the portion of the vehicle front-rear direction intermediate portion from the middle portion to the upper portion of the front side door inner panel 28 is substantially at the same time without being extremely delayed. Move inward.

That is, the upper, middle and lower portions of the side door inner panel move inward in the vehicle width direction at substantially the same time. Therefore, before the rotational speed in the direction of the front side door 12 (direction of arrow A in FIG. 1) with the waist 18C of the occupant 18 as a fulcrum increases, the shoulder 18A and the chest 18D of the occupant 8 are locked by the front side door inner. Since the vehicle reaches the portion provided with the reinforcement 36 in the vehicle front-rear direction intermediate portion from the middle portion to the upper portion of the panel 28, the collision speed of the shoulder portion 18A and the chest portion 18D of the occupant 8 can be reduced.

Further, in this embodiment, the reinforcement 36
Since both ends of the side door outer panel 26 are connected to the closed cross-section structure 32 of the belt line portion 20 and the impact beam 34 that does not largely move to the side door inner panel 28 side in the event of a side collision, the lower portion of the side door outer panel 26 is deformed. Following this, the direction of the impact absorption direction of the reinforce 36 does not change significantly, and by suppressing the fluctuation of the direction of the impact absorption direction of the reinforce 36, a predetermined amount of impact absorption can be secured.

A second embodiment of the side door structure of the present invention will be described with reference to FIGS.

Regarding the same members as in the first embodiment,
The same reference numerals are given and the description thereof is omitted.

As shown in FIG. 6, in the front side door 12 of this embodiment, the reinforcement 36 of the first embodiment is used.
In place of the inner reinforcement 40, the honeycomb member 60 is fixed to the outer reinforcement 38 as a reinforcing member. In addition, as shown in FIG. 5, the honeycomb member 60 is arranged so that the direction of the impact absorption direction is directed toward the side door inner panel 28 side.

Therefore, the front side door 1 is used in this embodiment.
In 2 as well, similar to the first embodiment, at the time of a side collision, the lower portion of the front side door inner panel 28 is pressed by the lower portion of the front side door outer panel 26 to move inward of the vehicle at substantially the same time by the honeycomb member 60, The part of the vehicle front-rear direction intermediate portion from the middle portion to the upper portion of the front side door inner panel 28 moves inwardly of the vehicle.

That is, the upper, middle and lower portions of the side door inner panel move inward in the vehicle width direction at substantially the same time. Therefore, before the rotational speed in the direction of the front side door 12 (direction of arrow A in FIG. 1) with the waist 18C of the occupant 18 as a fulcrum increases, the shoulder 18A and the chest 18D of the occupant 8 are locked by the front side door inner. Since the vehicle reaches the portion provided with the honeycomb member 60 in the vehicle front-rear direction intermediate portion from the middle portion to the upper portion of the panel 28, the collision speed of the shoulder portion 18A and the chest portion 18D of the occupant 8 can be reduced.

Further, in this embodiment, both ends of the outer reinforcement 38 supporting the honeycomb member 60 and the closed cross-section structure 32 of the belt line portion 20 do not move largely to the side door inner panel 28 side at the time of a side collision. Since it is connected to the impact beam 34, the deformation of the lower portion of the side door outer panel 26 is not followed, and the direction of the impact absorption direction of the reinforcement 36 is not significantly changed.
By suppressing the change in the direction of the impact absorption direction of the reinforcement 36, a predetermined impact absorption amount can be secured.

[0032]

According to the side door structure of the present invention, the side door inner panel forming the inner side portion of the side door, the side door outer panel forming the outer side portion of the side door, and the belt line inside the side door outer panel are provided. A door outer reinforcement that is arranged along the side door outer panel to form a closed cross-section structure extending in the front-rear direction with the side door outer panel,
A reinforcing member that is disposed below the door outer reinforcement and extends between the side door outer panel and the side door inner panel in the vehicle front-rear direction to suppress deformation of the side door outer panel toward the inside of the vehicle, and the side door outer panel and the side door. Both ends are provided at an intermediate portion in the vehicle front-rear direction between the inner panel and the inner panel, and both ends are respectively connected to the door outer reinforcement and the reinforcing member, and a distance between the side door inner panel and the side door outer panel is between the side door outer panel and the side door inner panel. Since it is configured to have a reinforcement member that is narrower than the space formed below the vehicle and absorbs the impact that acts from the outside of the vehicle to the inside of the vehicle due to deformation, the collision with the side door of the shoulder and chest of the occupant. It has an excellent effect that the speed can be reduced.

[Brief description of drawings]

1 is a sectional view taken along line 1-1 of FIG.

FIG. 2 is an operation explanatory view of the side door structure of the first embodiment of the present invention.

FIG. 3 is a perspective view showing main components of the side door structure of the first embodiment of the present invention.

FIG. 4 is a schematic side view showing a side door to which the side door structure of the first embodiment of the present invention is applied.

FIG. 5 is a sectional view corresponding to FIG. 1, showing a side door structure of a second embodiment of the present invention.

FIG. 6 is a perspective view showing main components of a side door structure according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a conventional side door structure as seen from the front side of the door.

FIG. 8 is an operation explanatory view of a conventional side door structure.

[Explanation of symbols]

 10 Front Seat 12 Front Side Door 18 Occupant 18A Shoulder 18B Waist 20 Belt Line 26 Front Side Door Outer Panel 28 Front Side Door Inner Panel 30 Door Outer Reinforce 32 Closed Section Structure 34 Impact Beam (Reinforcement Member) 35 Gap 36 Reinforce (Reinforcement) Member) 38 outer reinforcement 40 inner reinforcement 60 honeycomb member (reinforcing member)

Claims (1)

[Claims] 1. A side door inner panel forming an inner portion of a side door, a side door outer panel forming an outer portion of the side door, and a side door outer panel arranged inside the side door outer panel along a belt line. And a door outer reinforcement that forms a closed cross-section structure that extends in the front-rear direction, and extends in the vehicle front-rear direction between the side door outer panel and the side door inner panel that are disposed below the door outer reinforcement and extend toward the vehicle inner side of the side door outer panel. Of the side door outer panel and the side door inner panel, both ends of which are respectively connected to the door outer reinforcement and the reinforcement member, and the side door inner portion is provided between the side door outer panel and the side door inner panel. The space between the panel and the side door outer panel A reinforcing member that is narrower than a space formed below the reinforcing member between the roof and the side door inner panel and absorbs a shock acting from the outside of the vehicle to the inside of the vehicle due to deformation. Side door structure.