JPH07232555A - Structure for installation of door impact beam - Google Patents

Abstract

PURPOSE:To improve the supporting rigidity of an end part of a door impact beam without great increase of the weight in a structure for installation of the door impact beam. CONSTITUTION:A reinforcement 34 as a load transmitting member is provided between a base part 32A of a bracket provided on an end part 28A of a door impact beam 28, and a base part 30A of a door inner panel 30. The reinforcement 34 is of U-shape consisting of two opposite wall parts 34A, 34B and a connecting wall part 34C to connect these two opposite wall parts to each other, an opening part is arranged facing rearward of a vehicle, and constitutes a closed section part 35 of rectangular section extending in the vehicle lateral direction, i.e., the door thickness direction together with a rear wall part 30B of the door inner panel 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door impact beam mounting structure for protecting an occupant by preventing a door from moving in a vehicle interior direction.

[0002]

2. Description of the Related Art Conventionally, when a load is applied to the side surface of a vehicle from the outside in the vehicle width direction, the outer panel of the door may be deformed inward in the vehicle width direction. A structure is known in which a door impact beam capable of withstanding a lateral load is provided along the front-rear direction of a vehicle body, and an example of this door impact beam mounting structure is disclosed in Japanese Utility Model Publication No. 61-17688.

As shown in FIG. 7, in this door impact beam mounting structure, the door impact beam 7
Reinforce 74 and 76 to which the ends 70A and 72A of 0 and 72 are connected are the door outer panels 78 and 80 and the door inner panels 82 and 84, and a portion 86 having a box-shaped horizontal cross section.
88, the support rigidity of the end portions 70A and 72A of the door impact beams 70 and 72 is improved, and the strength and rigidity of the door is increased.

[0004]

However, in this door impact beam mounting structure, the portion that supports the load acting on the door impact beams 70 and 72 from the vehicle width direction (direction of arrow F in FIG. 7) is not Wall portions 74A and 76A of the reinforcements 74 and 76 along the direction of action, and a wall portion 82A of the door inner panel 82 facing the wall portion 74A.
And a wall portion 84A of the door inner panel 84 and a wall portion 80A of the door outer panel 80 that face the wall portion 76A. Therefore, the end portion 70 of the door impact beam 70, 72 is
In order to further improve the support rigidity of A and 72A, it is necessary to increase the thickness of each of the reinforcements 74 and 76, the door outer panel 80, and the door inner panels 82 and 84, resulting in a significant weight increase.

In view of the above facts, it is an object of the present invention to obtain a door impact beam mounting structure capable of improving the support rigidity of the end portion of the door impact beam without a significant increase in weight.

[0006]

A door impact beam mounting structure of the present invention according to claim 1 is a bracket to which an end portion of an impact beam is fixed, a door inner panel having a door rear wall portion, and the bracket. And a load transmitting member that is disposed between the door inner panel and the door inner panel and that forms a closed cross-section portion that extends in the door thickness direction with the door rear wall portion.

According to another aspect of the door impact beam mounting structure of the present invention, a closed cross-section member extending in the door thickness direction is provided between the bracket to which the end of the impact beam is fixed and the door inner panel. Is characterized by.

[0008]

According to the door impact beam mounting structure of the present invention as set forth in claim 1, the portion that supports the load acting from the end portion of the door impact beam extends in the door thickness direction together with the door rear wall portion of the door inner panel. A load transmission member forming a closed cross section is provided. Therefore, when a load is applied to the door impact beam from the outside in the vehicle width direction, the load can be supported by each surface forming the closed cross section. Therefore, it is not necessary to increase the thickness of the door panel, and the support rigidity of the end portion of the door impact beam can be improved without significantly increasing the weight.

In the door impact beam mounting structure of the present invention according to claim 2, a closed cross-section member extending in the door thickness direction is provided at a portion for supporting a load acting from an end portion of the door impact beam. Therefore, when a load is applied to the door impact beam from the outside in the vehicle width direction, the load can be supported by each surface forming the closed cross section of the closed cross section member. Therefore, it is not necessary to increase the thickness of the door panel, and the support rigidity of the end portion of the door impact beam can be improved without significantly increasing the weight.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a door impact beam mounting structure according to the present invention will be described with reference to FIGS.

In the figure, an arrow FR indicates a vehicle front direction, an arrow IN indicates a vehicle width inside direction, and an arrow UP indicates a vehicle upward direction.

As shown in FIG. 5, an automobile body 10
A front door opening 12 and a rear door opening 14 are formed at the side portions of the front side door 16, and a front side door 16 is attached to the front door opening 12 by a hinge 18 so as to be openable and closable. A rear side door 20 is attached to the rear door opening 14 by a hinge 22 so as to be openable and closable.

Bumper 2 inside front side door 16
A door impact beam 26 is provided at a height substantially the same as that of the rear side door 20 in the vehicle front-rear direction.
A door impact beam 28 is arranged at substantially the same height as the interior bumper 24 along the vehicle front-rear direction.

A corner of the rear lower portion of the rear door opening 14 of the body 10 is formed as a projecting portion 14A which projects toward the inner peripheral side of the opening, and the rear end of the door impact beam 28 is located outside the projecting portion 14A in the vehicle width direction. The part 28A is located.

As shown in FIG. 4, the rear side door 20
A bracket 32 is attached to the rear end portion 28A of the impact beam 28 on the door inner panel 30 side.
The base 32A of the bracket 32 is plate-shaped,
A recess 32B having a semicircular cross section is formed in the center of the recess 32B. The recess 32B extends substantially in the front-rear direction of the vehicle and is recessed inward in the vehicle width direction. The rear end portion 28A of the impact beam 28 is welded in the recess 32B.

As shown in FIG. 3, the impact beam 2
8 is adjacent to the door outer panel 33. A rear end portion of the base portion 30A of the door inner panel 30 is bent outward in the vehicle width direction to form a rear wall portion 30B.
A stepped portion 30C and a stepped portion 30D are formed stepwise on the vehicle width direction outer side portion. The rear end edge portion 32C of the bracket 32 is welded to the step portion 30D on the outer side in the vehicle width direction.

As shown in FIG. 4, a reinforcement 34 as a load transmitting member is provided between the base portion 32A of the bracket 32 and the base portion 30A of the door inner panel 30.

As shown in FIG. 1, the reinforcement 34
Has a U-shape composed of two wall portions 34A and 34B facing each other and a connecting wall portion 34C connecting them.
The opening is arranged so as to face the rear of the vehicle.

As shown in FIG. 2, the reinforcement 34
A flange 34D is formed on an outer edge portion of the wall portion 34A in the vehicle width direction toward the outer side of the U shape, and a flange 34D is formed on an outer edge portion of the wall portion 34B in the vehicle width direction toward the outer side of the U shape. 34
E is formed. These flanges 34D, 34E
Are welded to the base 32A of the bracket 32 with the recess 32B interposed therebetween.

A flange 34F is formed at an inner edge of the wall portion 34A in the vehicle width direction toward the outer side of the U shape, and a flange 34F is formed at the inner edge of the wall portion 34B in the vehicle width direction toward the outer side of the U shape. Flange 34G is formed. These flanges 34
F and 34G are welded to the base portion 30A of the door inner panel 30.

A flange 34H is formed at the rear edge of the wall portion 34A toward the rear of the vehicle so that the flange portion 34H extends outward.
At the vehicle rear side edge of B, the flange 3 is provided to the U-shaped outer side.
4J is formed. These flanges 34H, 34
J is welded to the rear wall portion 30B of the door inner panel 30.

Therefore, the reinforcement 34 and the rear wall portion 30B of the door inner panel 30 constitute a closed cross-section portion 35 having a rectangular cross-section extending in the vehicle width direction, that is, the door thickness direction.

As shown in FIG. 3, the door inner panel 3
On the inner side in the vehicle width direction of the rear portion of 0, a quarter panel 36 that constitutes an edge portion of the rear door opening portion 14 is arranged. The quarter panel 36 includes the base portion 3 of the door inner panel 30.
An edge portion 36A facing 0A, a rear wall portion 36C facing the rear wall portion 30B of the door inner panel 30, and a step portion 36D facing the step portion 30D of the door inner panel 30 are formed. A wheel house outer 38 is disposed on the inner side in the vehicle width direction of the quarter panel 36, and a front end edge portion 38A of the wheel house outer 38 is welded to a tip flange portion 36E of the edge portion 36A of the quarter panel 36. Further, the vehicle width direction outer end portion of the vertical wall portion 38B of the wheel house outer 38 is bent rearward to form a flange 38C, which is welded to the back surface of the design surface 36F of the quarter panel 36.

A reinforcement 40 is arranged between the quarter panel 36 and the wheel house outer 38. The tip of the opening edge portion 40A of the reinforce 40 is welded between the front edge portion of the flange 38A of the wheel house outer 38 and the tip flange portion 36E of the quarter panel 36. Vertical wall portion 40B of the reinforcement 40
The vehicle width direction outer end portion is bent rearward to form a flange portion 40C, and this flange portion 40C is welded to the flange 38C of the wheel house outer 38.

Therefore, the quarter panel 36, the wheel house outer 38, and the reinforcement 40 form a closed cross section 42, and the wheel house outer 38 and the reinforcement 40 form a closed cross section 44. A wheelhouse inner 46 is provided inside the wheelhouse outer 38 in the vehicle width direction, and a flange 46A of the wheelhouse inner 46 is welded to the flange 38A.

Next, the operation of this embodiment will be described.
In the door impact beam mounting structure of the present embodiment, when a bumper of another vehicle comes into contact with the door outer panel 33 of the rear side door 20 and a load is applied to the impact beam 28, this load is applied from the rear end portion 28A of the impact beam 28.
Each surface forming the closed cross section 35, that is, the reinforcement 3
4 wall portions 34A, 34B, 34C and door inner panel 3
0 is supported by the rear wall portion 30B and the door inner panel 30
Is transmitted to the base portion 30A of the door inner panel 30, and the base portion 30A of the door inner panel 30 comes into contact with the edge portion 36A of the quarter panel 36 to transmit the load to the edge portion 36A of the quarter panel 36.

As described above, in the door impact beam mounting structure of this embodiment, the end portion 2 of the door impact beam 28 is formed.
8A is provided with a rear wall portion 30B of the door inner panel 30 and a reinforcement 34 that forms a closed cross-section portion 35 extending in the vehicle width direction, that is, the door thickness direction. Therefore, the load acting on the door impact beam 28 is not affected by the wall portion 3 of the reinforcement 34 that constitutes the closed cross-section portion 35.
4A, 34B, 34C and the rear wall portion 30B of the door inner panel 30 can support them. Therefore, it is not necessary to increase the thickness of the door panel, and the support rigidity of the end portion 28A of the door impact beam 28 can be improved without significantly increasing the weight.

In the above, the present invention has been described in detail with reference 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, as shown in FIG. 6, a closed cross-section member 52 for independently forming a closed cross-section 50 having a rectangular cross section extending in the door thickness direction is provided with a base 32A of the bracket 32 and a base of the door inner panel 30. You may provide between 30A. In this case, the load acting on the door impact beam is applied to the wall portion 52 of the closed cross section member 52 forming the closed cross section 50.
Since it can be supported by A, 52B, 52C, and 52D, it is not necessary to thicken the door panel, and the support rigidity of the end portion of the door impact beam can be improved without a significant increase in weight. The flanges 52E and 52F formed at the ends of the closed cross-section member 52 are welded to the base portion 30A of the door inner panel 30, and the flanges 52G and 52H.
Is welded to the base 32A of the bracket 32.

In each of the above embodiments, the closed cross section 35,
Although 50 has a rectangular cross-section, the cross-sectional shapes of the closed cross-section portions 35 and 50 are not limited to this, and other shapes such as a circle, an ellipse, and a polygon may be used.

In each of the above embodiments, the present invention is applied to the door impact beam 28 of the rear side door 20. However, the present invention is not limited to the front side door 16.
The door impact beam 26 can also be applied.

[0032]

According to the door impact beam mounting structure of the present invention as set forth in claim 1, a bracket to which an end portion of the impact beam is fixed, a door inner panel having a door rear wall portion, the bracket and the door inner. Since it is provided with a reinforce which is disposed between the panel and the rear wall of the door and constitutes a closed cross section extending in the door thickness direction, the end portion of the door impact beam without a significant increase in weight. It has an excellent effect that it is possible to improve the support rigidity.

In the door impact beam mounting structure of the present invention as defined in claim 2, a closed cross-section member extending in the door thickness direction is provided between the bracket to which the end of the impact beam is fixed and the door inner panel. Therefore, there is an excellent effect that it is possible to improve the support rigidity of the end portion of the door impact beam without significantly increasing the weight.

[Brief description of drawings]

FIG. 1 is a perspective view of a door impact beam mounting structure according to an embodiment of the present invention, which is seen from a vehicle outer side obliquely front side.

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

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a perspective view of a door impact beam mounting structure according to an embodiment of the present invention, as viewed from the vehicle outer side and obliquely front side.

FIG. 5 is a schematic side view showing a vehicle to which a door impact beam mounting structure according to an embodiment of the present invention is applied.

FIG. 6 is an exploded perspective view of a door impact beam mounting structure according to another embodiment of the present invention, as viewed from the vehicle outer side and obliquely front side.

FIG. 7 is a plan sectional view showing a conventional door impact beam mounting structure.

[Explanation of symbols]

 28 Door Impact Beam 28A Rear End 30 Door Inner Panel 30B Rear Wall 32 Bracket 34 Reinforce (Load Transfer Member) 34A Wall 34B Wall 34C Connecting Wall 35 Closed Cross Section 50 Closed Cross Section 52 Closed Cross Section 52A Wall 52B wall 52C wall 52D wall

Claims (2)

[Claims] 1. A bracket to which an end portion of an impact beam is fixed, a door inner panel having a door rear wall portion, and a door rear wall portion disposed between the bracket and the door inner panel. A door impact beam mounting structure, comprising: a load transmitting member that forms a closed cross section that extends in a door thickness direction. 2. A door impact beam mounting structure comprising a closed cross-section member extending in a door thickness direction between a bracket to which an end portion of the impact beam is fixed and a door inner panel.