JP2002144872A - Door structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently reinforce a door with an impact bar without increasing the weight of a car body and the thickness of the door and without hindering vertical moving of a window glass. SOLUTION: The impact bar 8 is arranged in front-rise inclination to the front part of the car body. A portion of the impact bar 8, facing a door outer panel 3, is curved along the curved face of the door outer panel 3 so as to come close thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a vehicle door structure reinforced with an impact bar.

[0002]

2. Description of the Related Art In the event of a side collision, it is dangerous for an occupant if the door is deformed and enters the passenger compartment, so that the deformation of the door is suppressed as shown in FIGS. 5 (a) and 5 (b). At the inside of a front side door b on the side of the front seat of the vehicle body a, an impact bar c made of a square pipe or the like is bracketed at both ends so as to extend horizontally and in the vehicle longitudinal direction.
The front side door b is reinforced by supporting and arranging the front side door b, and the amount of entry of the front side door b due to a side collision is reduced to protect the occupant.

The present applicant has previously applied for a technique disclosed in Japanese Patent Application Laid-Open No. H11-78524 as a door structure reinforced with an impact bar. The technical content is that an impact bar constituted by combining a plurality of plates is disposed inside the door so as to be inclined forward and upward toward the front of the vehicle body.

As shown in FIG. 5 (b), each impact bar employed in the above door structure has a straight shape that extends straight, and receives a load acting upon a side collision with bending resistance. It has become.

[0005]

However, from the viewpoint of protecting the occupant, it is desirable to further enhance the reinforcing effect of the impact bar.

Therefore, it is conceivable to strengthen the impact bar by increasing the cross-sectional shape of the impact bar or increasing the thickness of the impact bar. However, the weight of the vehicle increases and the impact bar is arranged inside the door. A large installation space must be secured and the door becomes thick.

Further, since the inside of the door where the impact bar is provided is also a space for the window glass to go up and down, care must be taken to prevent the impact bar from interfering with the window glass.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide an impact bar without increasing the weight of a vehicle body or the thickness of a door and without hindering the elevation of a window glass. Is to sufficiently reinforce the door.

[0009]

In order to achieve the above object, the present invention is characterized in that the shape of the impact bar and the attitude inside the door are devised.

More specifically, the present invention relates to a vehicle door structure having a door outer panel which projects outwardly in a curved shape in an arc shape, and in which an impact bar is disposed so as to extend in the vehicle longitudinal direction. Targeted, the following solutions were taken.

That is, according to the first aspect of the present invention, the impact bar is disposed to be inclined in the vehicle longitudinal direction,
In addition, a portion facing the door outer panel is curved along a curved surface thereof so as to approach the door outer panel.

According to the first aspect of the present invention, since the impact bar is not a linear shape but a bow-shaped curved shape protruding toward the door outer panel, the impact bar can be formed along the curved surface of the impact bar. Is longer than the linear distance between the mounting points at both ends of the impact bar.
Therefore, when a collision load is input to the impact bar at the time of a side collision, the collision load is distributed to both ends of the impact bar in the longitudinal direction of the vehicle (longitudinal direction of the bar) and spreads both ends of the impact bar in the longitudinal direction of the vehicle (longitudinal direction of the bar). To try. Since the tension and rigidity are obtained on the impact bar by the action of this force, the compression strength is obtained in addition to the bending strength against the input of the collision load at the time of the side collision, and the door strength is sufficiently secured. Therefore, even if a large collision load acts on the door during a side collision, entry of the door into the vehicle compartment is suppressed as much as possible, and occupant protection is reliably achieved.

Further, as described above, since the door is sufficiently reinforced by the impact bar, it is not necessary to take measures such as enlarging the cross-sectional shape of the impact bar or increasing the thickness thereof. In such a case, the weight of the vehicle body can be prevented from increasing, and the space for disposing the impact bar inside the door can be kept the same, and the door can be prevented from being thick.

Further, since the impact bar curved along the curved shape of the door outer panel is disposed close to the door outer panel in an oblique posture, the impact bar inside the door is prevented from interfering with the window glass. It is efficiently installed in a limited space.

[0015] In addition, the oblique attitude of the impact bar widens the guard range in the vertical direction of the door, making it possible to sufficiently cope with a high vehicle.

Further, in the conventional case where the impact bar is in a horizontal posture, at the time of a frontal collision and a rearward collision, the collision load input from the front-rear direction of the vehicle body is directly input to the impact bar along the bar center line. To be
Although the impact bar is sandwiched between the hinge pillar on the front side of the door and the pillar on the rear side, the impact bar becomes a stick and the door cannot be opened. And at the time of rear collision,
The impact bar does not become a stick, preventing the door from opening.

According to a second aspect of the present invention, in the first aspect of the present invention, the impact bar is disposed so as to be inclined forward and upward toward the front of the vehicle body.

According to the second aspect of the present invention, since the impact bar is suspended from the hinge pillar of the door, the impact bar is inclined downward and forward toward the front of the vehicle body. Unreasonable load does not act on the hinge of the door as compared with the case of the installed reverse orientation, and the support state of the door is stabilized.

According to a third aspect of the present invention, in the second aspect, an end of the impact bar on the vehicle body front side is close to an end of the instrument panel reinforcement. I do.

According to the above configuration, according to the third aspect of the invention, the collision load due to the side collision is transmitted from the impact bar to the instrument panel reinforcement.
This instrument panel reinforcement is
Originally, it has high support rigidity and is firmly fixed to a vehicle body to support an instrument panel and a steering shaft on which instruments and the like are mounted. Therefore, the instrument panel reinforcement having a high support rigidity receives a collision load, so that the door can be further suppressed from entering the vehicle interior.

According to a fourth aspect of the present invention, in the first aspect of the present invention, both ends of the impact bar facing the door outer panel in the vehicle longitudinal direction are linearly connected by reinforcing members. And

According to the fourth aspect of the invention, in the invention described in claim 4, a force for pushing the impact bar in the longitudinal direction of the vehicle body (longitudinal direction of the bar) at both ends by inputting a collision load at the time of a side collision. Works, but the reinforcement member restrains the position of both ends of the impact bar in the longitudinal direction of the vehicle (bar longitudinal direction) against the force that tries to spread it out, so sufficient tension rigidity is obtained and strength is further improved I do.

In addition, the surface on the impact load input side of the impact bar is shared by the compression input, and the opposite side of the impact bar on the non-input side is assigned to the tension input. Increase.

Furthermore, since the reinforcing member connects both ends of the curved impact bar in the vehicle longitudinal direction (bar longitudinal direction) in a straight line, the impact bar does not protrude from the area where the impact bar is provided, and the impact bar is inclined. It does not hinder the installation in the posture.

[0025]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) In FIG.
Denotes a vehicle body, and 2 denotes a front side door 2 to which the door structure according to Embodiment 1 of the present invention is applied.
As shown in FIG. 1C, the front side door 2
Comprises a door outer panel 3 which is curved and protrudes outward in an arc shape, and a door inner panel 4 disposed on the back side thereof, and the door outer panel 3 and the door inner panel 4 are each formed at a peripheral portion thereof. It is formed by joining.

As shown in FIG. 2, the front side door 2 is attached to a side surface of a hinge pillar 5 in front of the front side door 2 by a hinge (not shown) provided at a front end portion of a door inner panel 4, and is vertically arranged. It is configured so that it can be opened and closed by rotating about a hinge axis that extends.
In FIG. 2, reference numeral 6 denotes an instrument panel reinforcement (hereinafter, abbreviated as an instrument panel reinforcement).
It is for supporting an instrument panel and a steering shaft on which instruments and the like are mounted. The support rigidity is originally high, and extends horizontally in the width direction of the vehicle in the cab of the vehicle body 1 and both ends thereof. Are firmly fixed to the inner panel portion of the hinge pillar 5 via a bracket 7.

Inside the front side door 2, an impact bar 8 made of a round pipe, a square pipe, or the like is fixed to the door inner panel 4 via brackets 9 attached to both ends in the longitudinal direction, and extends in the vehicle longitudinal direction. The impact bar 8 is arranged so as to be inclined forward and upward toward the front of the vehicle body, and the end of the impact bar 8 on the front side of the vehicle is close to the end of the instrument panel reinforcement 6. The impact bar 8 may be arranged so as to be inclined forward and downward toward the front of the vehicle body, contrary to the above.
This is the same in Embodiments 2 and 3 described below.

As shown in FIGS. 1 (b) and 1 (c), the most significant feature of the present invention is that the impact bar 8 is formed in an arcuate curved shape projecting toward the door outer panel 3 side. The part facing the outer panel 3 (FIG. 1)
((B) upper surface) approaches the door outer panel 3 and is curved along the curved surface thereof. Therefore, even if the window glass 10 moves up and down, the up and down trajectory does not interfere with the impact bar 8. Due to such a curved shape, the actual length L1 along the curved surface of the impact bar 8 is longer than the linear distance L2 between the mounting points at both ends of the impact bar 8.

In the front side door 2 configured as described above, the impact bar 8 is formed not in a linear shape but in an arcuate curved shape protruding toward the door outer panel 3, so that the impact bar 8 extends along the curved surface of the impact bar 8. Actual length L
1 is longer than the linear distance L2 between the mounting points at both ends of the impact bar 8, so that the collision load F input to the impact bar 8 at the time of a side collision can be reduced at both ends of the impact bar 8 in the vehicle longitudinal direction (bar longitudinal direction). Side, the load is dispersed as a load f, whereby a force that pushes and spreads both ends of the impact bar 8 in the front-rear direction of the vehicle body (longitudinal direction of the bar) can be exerted to obtain a tensile rigidity. On the other hand, in addition to the bending strength, the compression strength is obtained, and the strength of the front side door 2 can be sufficiently increased.

Therefore, even if a large collision load acts on the front side door 2 during a side collision, entry of the front side door 2 into the vehicle interior can be suppressed as much as possible, and occupant protection can be reliably achieved. .

Further, as described above, the front side door 2
Since the impact bar 8 is sufficiently reinforced, it is not necessary to take measures such as enlarging the cross-sectional shape of the impact bar 8 or increasing the thickness. In addition to being able to adopt, the increase in the weight of the vehicle body can be avoided, and the impact bar 8 can be arranged in the same arrangement space as in the related art, so that the front side door 2 can be prevented from being thick.

Further, since the impact bar 8 is arranged close to the door outer panel 3 so as to be curved along the curved shape thereof and is disposed in an oblique posture, the impact bar 8 is not interfered with the window glass 10 so as not to interfere with the window glass 10. It can be efficiently disposed in a limited space inside the side door 2.

In addition, since the impact bar 8 is disposed in an oblique posture as described above, the front side door 2
, A wide guard range in the vertical direction can be secured, and it is possible to sufficiently cope with a vehicle having a high vehicle height.

Further, since the impact bar 8 is disposed in an oblique posture, the impact bar 8 can be used at the time of a frontal collision and a rearward collision.
It is possible to avoid a situation in which the impact bar 8 does not become a stick and the front side door 2 does not open. In other words, in the conventional case where the impact bar is in a horizontal posture,
At the time of a frontal collision and a rearward collision, the collision load input from the vehicle front-rear direction is directly input to the impact bar along the bar center line, so that the impact bar is located between the hinge pillar at the front of the door and the pillar at the rear. It becomes a stick that is caught in the door and the door cannot be opened.

Further, since the impact bar 8 is arranged so as to be inclined forward and forward toward the front of the vehicle body and hang down from the hinge pillar 5 of the front side door 2, the impact bar 8 is lowered forward toward the front of the vehicle body. As compared with the case where the front side door 2 is disposed in an inclined position, an excessive load is not applied to the hinge of the front side door 2, and the front side door 2 can be stably supported.

Furthermore, since the end of the impact bar 8 on the front side of the vehicle body is close to the end of the instrument panel reinforcement 6, the impact load due to the side collision can be reduced from the impact bar 8 by the impact panel 8 having an inherently high support rigidity. This can be transmitted to the reinforcement 6, and the suppression of the front side door 2 from entering the vehicle interior can be further ensured.

(Embodiment 2) FIGS. 3A, 3B and 3C show an impact bar 8 according to Embodiment 2 of the present invention. Here, the impact bar 8 is formed by the flat plate 11 and the channel plate 12 so as to have a hat-shaped cross section. Further, inside the impact bar 8, a reinforcing plate 13 as a reinforcing member is provided.
A portion of the impact bar 8 facing the door outer panel 3, that is, both ends of the channel plate 12 in the vehicle longitudinal direction (bar longitudinal direction) are linearly connected by the reinforcing plate 13. This impact bar 8 is also provided inside the front side door 2 similarly to the impact bar 8 of the first embodiment.

Therefore, in the second embodiment, the same functions and effects as those of the first embodiment can be obtained.

In addition, in the second embodiment, since both ends in the vehicle longitudinal direction (bar longitudinal direction) of the channel plate 12 of the impact bar 8 facing the door outer panel 3 are linearly connected by the reinforcing plate 13, The reinforcement plate 13 can restrain the positions of both ends of the impact bar 8 against the force of pushing the impact bar 8 toward both ends in the vehicle longitudinal direction (bar longitudinal direction) by inputting a collision load at the time of a collision. Thereby, sufficient tensile rigidity can be obtained, and the strength can be further improved.

In addition, the impact bar 8
The surface on the collision load input side can be shared by the compression input, and the surface on the non-input side opposite thereto can be shared by the tension input, and a further higher rigidity can be obtained by the conflicting input.

Further, the impact bar 8 having the curved shape is used.
Reinforcement plate 1 at both ends of the vehicle body longitudinal direction (bar longitudinal direction)
Since the reinforcing plate 13 is arranged inside the impact bar 8 by being connected in a straight line by 3, there is an advantage that it is possible to prevent obstruction when the impact bar 8 is arranged in an oblique posture.

(Embodiment 3) FIGS. 4A, 4B and 4C show an impact bar 8 according to Embodiment 3 of the present invention. Here, both ends in the vehicle longitudinal direction (both longitudinal ends) of the channel plate 12 of the impact bar 8 facing the door outer panel 3 are linearly connected by reinforcing wires 14 as reinforcing members. The other configuration is the same as that of the second embodiment, and the arrangement inside the front side door 2 is also the same. In addition, the reinforcing wire 14 includes
It is also possible to wind a sponge or the like to stop the sound due to the vibration, or to fill the inside of the impact bar 8 with a foam material or the like.

Therefore, in the third embodiment, the same operation and effect as in the second embodiment can be obtained.

[0045]

As described above, according to the first aspect of the present invention, the impact bar is disposed inside the door so as to be inclined in the longitudinal direction of the vehicle body, and the impact bar portion facing the door outer panel is provided at the door. Curved along the curved surface so as to approach the outer panel, so that in the event of a side collision, the impact load is distributed to both ends of the impact bar to obtain tension stiffness. And sufficient strength can be ensured. Therefore, it is possible to sufficiently withstand a large collision load, to minimize the entry of the door into the vehicle interior, and to reliably protect the occupant. Further, the reinforcement by the impact bar can avoid an increase in the weight of the vehicle body and an increase in the thickness of the door. Further, the impact bar can be efficiently disposed so as not to interfere with the window glass by the oblique posture of the impact bar curved along the curved shape of the door outer panel. In addition, due to the oblique attitude of the impact bar, the guard range in the vertical direction of the door can be widened to sufficiently cope with a high vehicle.
Furthermore, by disposing the impact bar diagonally,
At the time of a frontal collision and a rearward collision, it is possible to avoid a situation in which the impact bar does not become a stick and the door does not open.

According to the second aspect of the present invention, the impact bar is disposed so as to be inclined forward and upward toward the front of the vehicle body, so that the impact bar is hung on the hinge pillar and the impact bar is in a reverse position. An unreasonable load does not act on the hinge of the door, and the door can be stably supported.

According to the third aspect of the present invention, the front end portion of the impact bar on the vehicle body is brought close to the end portion of the instrument panel reinforcement having inherently high support rigidity, and the impact load is reduced by the instrument panel reinforcement. As a result, it is possible to further ensure that the door does not enter the passenger compartment.

According to the fourth aspect of the present invention, both ends of the impact bar facing the door outer panel in the front-rear direction of the vehicle body are linearly connected by the reinforcing member, so that the force caused by the impact load of the impact bar is reduced. On the other hand, the position of both ends of the impact bar is restrained sufficiently by the reinforcing member, and the strength can be further improved by sufficient tension rigidity. In addition, by this, the surface on the impact load input side of the impact bar is shared by the compression input, and the surface on the non-input side, which is the opposite side, is shared by the tension input, and the effect of the tension rigidity is enhanced by the conflicting input. Can be. Furthermore, it is possible to prevent the reinforcing member from protruding from the impact bar so as not to hinder the arrangement of the impact bar in an oblique posture.

[Brief description of the drawings]

FIG. 1 shows a front side door to which a door structure according to Embodiment 1 of the present invention is applied, (a) is a front view thereof, (b) is an overall view of an impact bar, and (c) is (a).
2 is a cross-sectional view of the front side door as viewed from the direction of arrow A.

FIG. 2 is a cross-sectional view showing a positional relationship between an impact bar and an instrument panel reinforcement in the front side door to which the door structure according to the first embodiment of the present invention is applied.

3A and 3B show an impact bar according to Embodiment 2 of the present invention, wherein FIG. 3A is an overall view of the impact bar, FIG. 3B is a cross-sectional view taken along line BB of FIG. 3A, and FIG. C
It is sectional drawing in the -C line.

4A and 4B show an impact bar according to Embodiment 3 of the present invention, wherein FIG. 4A is an overall view of the impact bar, FIG. 4B is a cross-sectional view taken along line DD of FIG. 4A, and FIG. E
It is sectional drawing in the -E line.

5A and 5B show a front side door in which an impact bar is provided in a conventional door structure, wherein FIG. 5A is a front view thereof, and FIG. 5B is an overall view of the impact bar.

[Explanation of symbols]

 2 Front side door 3 Door outer panel 6 Instrument panel reinforcement 8 Impact bar 13 Reinforcement plate (reinforcement member) 14 Reinforcement wire (reinforcement member)

Claims (4)

[Claims] 1. A door structure for a vehicle having a door outer panel which is curved and protrudes outward in an arc shape, and an impact bar is disposed inside the vehicle so as to extend in a vehicle front-rear direction. A vehicle door structure, wherein the vehicle door structure is disposed so as to be inclined in the vehicle front-rear direction, and a portion facing the door outer panel is curved along a curved surface so as to approach the door outer panel. 2. The vehicle door structure according to claim 1, wherein the impact bar is disposed so as to be inclined forward and upward toward the front of the vehicle body. 3. The vehicle door structure according to claim 2, wherein the front end of the impact bar on the vehicle body is close to the end of the instrument panel reinforcement. . 4. The vehicle door structure according to claim 1, wherein both ends of the impact bar facing the door outer panel in the front-rear direction of the vehicle are connected linearly by reinforcing members. Construction.