JP2590504Y2 - Vehicle door 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 door structure for ensuring the safety of an occupant in the event that another vehicle collides with the side of the vehicle, that is, in the case of a so-called side collision.

[0002]

2. Description of the Related Art Generally, in a side collision between passenger cars, the height position of a bumper of the collision vehicle substantially coincides with the height position of the waist of an occupant seated on the seat of the colliding vehicle. Tend to concentrate on the lower back. In particular, in the case of a heavy collision in which the bumper of the collision vehicle hits the door of the collision vehicle directly and sinks into the interior space of the door, the occupant sitting near the door collides with the inside of the door by the recoil of the collision As a result, a very large impact is applied to the occupant's waist.
Therefore, in the United States and the like, emphasis has been placed on the safety of the occupant in a side collision, and legislation has been enacted to suppress the acceleration applied to the lumbar portion of the occupant in a side collision to a predetermined value or less.

In order to ensure the safety of the occupant in the event of such a side collision, the collision energy of the bumper of the colliding vehicle applied to the door is effectively absorbed at the height of the waist of the occupant sitting on the seat near the door. At the same time, it is required for the structure of the door itself to reduce the impact applied to the occupant's waist.

Conventionally, as a countermeasure against side collision of a vehicle door, a door guard bar formed by joining a plate-shaped batch to a beam having a hat sectional structure is provided with a door guard bar having a predetermined size from a cutout portion of a door outer panel. There is a prior art in which the door guard bar is provided so as to protrude outside the outer panel to absorb collision energy (for example, see Japanese Patent Application Laid-Open No. 56-149212). Japanese Patent Application Laid-Open No. 56-50813 discloses a prior art in which a beam is arranged at a central position inside a door and the collision energy is absorbed by the beam.

[0005]

Incidentally, in the above-mentioned prior art, the door guard bar and the beam are all disposed in the middle of the door in the height direction, and are located at a position higher than the bumper position of the collision vehicle. Therefore, at the time of side collision between passenger cars, the collision energy of the bumper of the collision car cannot be effectively absorbed, and there is a problem that it is not very useful in protecting the occupant, particularly the waist.

The present invention has been made in view of this point, and a vehicle capable of effectively absorbing the collision energy of a bumper of a collision vehicle applied to a door in a side collision and reducing the impact applied to the lumbar portion of an occupant. It is intended to provide a door structure for use.

[0007]

In order to achieve the above object, a vehicle door structure according to the present invention is provided in a space between a door outer panel on which a side door beam is mounted in the front-rear direction and a vertical movement path of a door glass. A guard means for side collision is provided, and the guard means is disposed at a height corresponding to the waist of the occupant seated on the seat near the door and at the front and rear positions and is capable of absorbing collision energy; The basic means is a structure having an upper connecting member for supporting the upper part of the energy absorbing member on the side door beam and a lower connecting member for supporting the lower part of the energy absorbing member on the lower part of the door inner panel.

In addition to this basic means, at least the upper connecting member is provided so that the energy absorbing member can be moved substantially in parallel from the door outer panel side to the door inner panel side by an external force acting on the door outer panel at the time of a side collision. The means is a bent cross-sectional shape that can be extended to the inner panel side.

Further, the energy absorbing member is constituted by a sheet metal hexagonal pipe-shaped shock absorber arranged in two upper and lower stages.

[0010]

In the vehicle door structure of the present invention employing the above-described basic means, when a bumper of a collision vehicle hits the door directly and digs into the interior space of the door due to a side collision between passenger cars, the vehicle is seated on a seat near the door. The collision energy of the bumper is directly and effectively absorbed by the energy absorbing member of the guard means which is located at the height corresponding to the occupant's waist and substantially corresponds to the height of the bumper.

Further, in addition to the above-described basic means, when the upper connecting member has a bent cross-sectional shape which can be extended toward the door inner panel, the upper connecting member is used when the energy absorbing member absorbs the collision energy of the bumper. As the member expands, the energy absorbing member moves almost parallel from the door outer panel side to the door inner panel side while absorbing the bumper collision energy, and alleviates the impact applied to the waist when the occupant collides with the inside of the door I do.

Here, when the energy absorbing member is constituted by a sheet metal hexagonal pipe-shaped shock absorber arranged in two upper and lower stages, the function of absorbing the collision energy of the bumper and the function of reducing the shock applied to the waist of the occupant are as follows. Since the shock absorber is crushed by plastic deformation, large impact energy is absorbed in a small stroke, and the energy absorption state is maintained, so that the impact applied to the waist of the occupant is more effectively reduced. .

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the accompanying drawings. FIG. 5 shows a schematic configuration of a passenger car to which an embodiment is applied. Here, inside the front door 10, a guard means 20 for a side collision is arranged at a portion corresponding to the waist D of the occupant C seated on the cushion 4 of the front seat 3 arranged inside the front door 10. Is provided.

As shown in the sectional view of FIG. 1, the front door 10 has a structure in which a door outer panel 11 and a door inner panel 12 form an internal space and are joined to each other. Up and down through the door glass 1
4 are provided. The stiffening side door beam 2 is provided so as not to hinder the elevating operation of the door glass 14.
1 is mounted substantially horizontally in the vehicle longitudinal direction along the inner surface of the door outer panel 11.

The side door beam 21 is disposed substantially at the center of the front door 10 in the height direction, and is mounted above the position of the waist D of the occupant C. The guard means 20 is provided along the inner surface of the door outer panel 11 in the space between the door outer panel 11 and the vertical movement path of the door glass 14 using the side door beam 21 and the lower end step 15 of the door inner panel 12 as supporting members. The door glass 14 is not hindered from moving up and down.

The guard means 20, as shown in FIG.
The upper connecting member 22, the energy absorbing member 25, and the lower connecting member 23 are linearly connected. The upper connecting member 22 has a substantially U-shaped bent shape in which the door outer panel 11 side is open and surrounds the side door beam 21. It has a bracket shape in cross section, and the upper piece 22a is the side door beam 2
1 is spot-welded to the upper surface and can be extended to the door inner panel 12 side. Further, the lower connecting member 23 has a hole 23a for reducing the weight in the center portion, and has a relatively wide plate-like shape that curves vertically along the door outer panel 11, and the lower end portion 23b has a door inner panel 23b. 12
Is spot-welded to the lower end step portion 15 so that it can be tilted toward the door inner panel 12 side.

The energy absorbing member 25 of the guard means 20 corresponds to the bumper B of the collision vehicle A, and has a height corresponding to the waist D of the occupant C and a front and rear position.
2 and the lower connecting member 23, the upper connecting member 22 extends toward the door inner panel 12 when the bumper B of the collision vehicle A directly hits the front door 10, and the lower connecting member 23 is the door inner panel 12
By tilting to the side, it can move substantially parallel to the door inner panel 12 side.

Here, the energy absorbing member 25 is constituted by sheet metal shock absorbers 28, 28 arranged in two stages vertically and extending in the front-rear direction of the vehicle body. The shock absorbers 28, 28 are formed in a honeycomb shape by joining two sheet metal members 26, 27 which are bent and formed in an uneven shape such that a mountain part and a valley face each other. As shown in the load characteristic of No. 3, the energy of a large side collision can be absorbed by a small stroke, and the energy absorption state can be maintained.

Next, the operation of the embodiment configured as described above will be described. First, when the bumper B of the collision vehicle A directly hits the front door 10 due to a side collision between the passenger cars, as shown in FIG. 4, the bumper B indents the lower part of the side door beam 21 of the door outer panel 11 and inwards. The impact absorbers 28, 2 which are recessed and are energy absorbing members 25 arranged inside the door outer panel 11
Violently crashes into 8. Therefore, the shock absorbers 28, 28 directly and effectively absorb the large collision energy due to the side collision by the outer metal plate 26 being plastically deformed inward and crushed.

In the case of such a side collision, the occupant C collides with the inside of the front door 10 violently due to the reaction. At this time, an external force from the bumper B acts on the shock absorbers 28, 28. The upper connecting member 22 extends toward the door inner panel 12, and the lower connecting member 23 tilts toward the door inner panel 12, whereby the shock absorbers 28, 28 are substantially parallel to the door inner panel 12 side. Moving. Therefore, the waist D of the occupant C is
Violently collide with the inside of the vehicle, the sheet metal material 27 inside the shock absorbers 28, 28 is plastically deformed outward and crushed, thereby absorbing and relaxing the shock applied to the waist D of the occupant C. Thus, the damage of the occupant C at the time of the side collision is greatly reduced, and safety is ensured.

The shock absorber 2 in the above embodiment is used.
8, 28 are not limited to hexagonal pipes, but may be of any shape as long as they have a cross-sectional shape easily crushed by plastic deformation. Furthermore, the material of the shock absorbers 28 is not limited to sheet metal.

[0022]

As described above, according to the basic means of the present invention, even if the bumper of a collision vehicle hits the door directly and digs into the interior space of the door due to a side collision between passenger cars, the guard means can be used. Since the energy absorbing member is located at the height corresponding to the waist of the occupant seated on the seat near the door and at the front-back position and substantially corresponds to the height position of the bumper, the collision energy of the bumper can be directly and effectively used. Can be absorbed.

Further, in addition to the above-described basic means, when the upper connecting member has a bent cross-sectional shape that can be extended toward the door inner panel, the upper connecting member is used when the energy absorbing member absorbs the collision energy of the bumper. When the member is extended, the energy absorbing member moves from the door outer panel side to the door inner panel side substantially in parallel while absorbing the collision energy of the bumper, so that the impact applied to the waist when the occupant collides with the inside of the door is provided. Can be eased.

Here, when the energy absorbing member is constituted by a sheet metal hexagonal pipe-shaped shock absorber arranged in upper and lower two stages, the function of absorbing the collision energy of the bumper and the function of reducing the shock applied to the waist of the occupant are as follows. Since the shock absorber is crushed by plastic deformation, the shock absorber can absorb a large amount of collision energy with a small stroke, and the energy absorption state can be maintained. Therefore, the impact applied to the waist of the occupant can be reduced more effectively.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a vehicle door structure according to the present invention.

FIG. 2 is a perspective view showing a structure of a guard means in one embodiment.

FIG. 3 is a diagram showing a load characteristic of an energy absorbing member in one embodiment.

FIG. 4 is a cross-sectional view illustrating an operation of the embodiment at the time of a side collision.

FIG. 5 is a side view showing an overall schematic configuration of a vehicle to which one embodiment is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Rear door 3 Front seat 4 Cushion 10 Front door 11 Door outer panel 12 Door inner panel 13 Opening 14 Door glass 15 Lower step 20 Guard means 21 Side door beam 22 Upper connecting member 22a Upper piece 23 Lower connecting member 23a Drilling hole 23b Lower end Part 25 Energy absorbing member 26, 27 Sheet metal material 28 Shock absorber

Continuation of the front page (56) References JP-A-56-149212 (JP, A) JP-A-56-50813 (JP, A) JP-A-5-246243 (JP, A) JP-A 64-1116 (JP) , U) Actually open sho 59-60019 (JP, U) Actually open sho 61-147655 (JP, U) Actually open 2-72125 (JP, U) Actually open 1-103417 (JP, U) Actually open 4-11114 (JP, U) Jikken Sho 53-17227 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60J 5/00 B60J 5/04 B60R 21/02

Claims (3)

(57) [Scope of request for utility model registration] 1. A side collision guard means is provided in a space between a door outer panel on which a side door beam is mounted in a front-rear direction and a vertical movement path of a door glass, the guard means comprising a seat near a door. an upper connecting member and seated occupant that the disposed height and longitudinal position corresponding to the lumbar absorbable energy absorbing member collision energy, the upper portion of the energy absorbing member is supported by the side door beam,
Vehicle door structure characterized in that a structure having a lower connecting member for supporting a lower portion in the lower portion of the door inner panel of the energy absorbing member. At least the upper connecting member is bent to extend toward the door inner panel so that the energy absorbing member can move from the door outer panel side to the door inner panel side substantially in parallel by an external force acting on the door outer panel at the time of a side collision. The vehicle door structure according to claim 1, wherein the vehicle door structure has a cross-sectional shape. 3. The vehicle door structure according to claim 1, wherein the energy absorbing member is constituted by a sheet metal hexagonal pipe-shaped shock absorber arranged in two upper and lower stages.