JP2002144871A - Door structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door structure for a vehicle, compatibly achieving the improved rigidity of an impact bar itself and the simplified manufacture of the impact bar and reducing the numbers of parts and assembling man-hours by constituting impact absorbing portions and mounted portions of the impact bar extending to the longitudinal direction of the vehicle to enhance the rigidity of the door against side impact by an integrated tubular member. SOLUTION: The door structure for the vehicle comprises a door frame 11 forming an outer frame of the door of the vehicle and the impact bar 29 provided in the door frame 11 and extending in the longitudinal direction of the vehicle. The impact bar 29 has the rod impact absorbing portions 30a, 31a and the mounting portions 30b, 31b, 32 mounted on the door frame 11. The impact absorbing portions 30a, 31a and the mounting portions 30b, 31b, 32 are formed using the integral tubular member.

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 including a door frame forming an outer frame of a vehicle door, and an impact bar provided in the door frame and extending in the front-rear direction of the vehicle. About.

[0002]

2. Description of the Related Art Generally, one or two impact bars extending in the front-rear direction of a vehicle are mounted inside a door frame that constitutes a front door or a rear door of the vehicle. It is configured to increase. A conventional vehicle door structure provided with such an impact bar is configured as shown in FIGS. 10, 11 and 12.

That is, a door inner panel 86 is formed by a door frame 84 (door frame portion) having a front side portion 81, a rear side portion 82, and a lower side portion 83, and a panel portion 85.
On the outside of the door inner panel 86, the door outer panel 8 is provided.
7 are joined.

A door sash 88 is provided at the upper part, and a door window glass 91 which can be moved up and down along a glass guide 89 and a glass sub-guide 90 is provided. A carrier plate 92 is attached to a lower part of the door window glass 91. When the motor 93 is driven, the carrier plate 92 moves up and down along the regulator 94 to constitute a power window regulator that raises and lowers the door window glass 91. Reference numeral 95 denotes an audio speaker. Step portion 86a of door inner panel 86 described above
The upper impact bar 96 extends in the front-rear direction of the vehicle.
And a lower impact bar 97 are attached.

As shown in an exploded perspective view in FIG. 12, an upper impact bar 96 has an impact bar body 98 as an impact absorbing member, and brackets 99, which are joined to the impact bar body 98 at both front and rear portions by welding means. Similarly, the lower impact bar 97 includes an impact bar main body 101 as an impact absorbing member, and brackets 102 and 103 joined to both front and rear portions of the impact bar main body 101 by welding means. Consisting of parts,
Each bracket 99, 100, 102, 1 integrally joined before and after the impact bar main bodies 98, 101, respectively.
03 is fixedly joined to the step portion 86a of the door inner panel 86 by welding means.

As described above, in the conventional vehicle door structure, since each impact bar 96, 97 is composed of a plurality of parts, the number of parts of the impact bar itself is large, and the man-hour for assembling the door is large. There was a problem.

On the other hand, Japanese Patent Application Laid-Open No. 10-250370 discloses a door structure of a vehicle provided with two impact bars extending in the front-rear direction of the vehicle. The only difference between the conventional structure of FIG. 12 and the impact bar mounting layout is that each impact bar is composed of a plurality of parts.
Since this is equivalent to the conventional structure of FIG. 12, the same problem as described above occurs.

Japanese Patent Application Laid-Open Nos. Hei 10-218017 and Hei 11-235963 disclose a configuration in which a hydroform molded part is used as a reinforcing member of a vehicle body.

That is, the former JP-A-10-218017
Japanese Patent Application Laid-Open No. H11-111699 discloses a structure in which a reinforcing member formed by hydroforming is disposed inside a closed cross section between a center pillar outer and a center pillar inner.
Japanese Patent Publication No. 235963 discloses a structure in which a reinforcing member formed by hydroforming is disposed inside a closed cross section between a rocker panel and a floor side panel constituting a cabside front frame.

[0010]

When the reinforcing member formed by hydroforming is disposed inside a closed cross section as described above, the rigidity of the vehicle body is improved, but the number of parts is increased and the number of assembly steps is reduced. In addition, there has been a problem that weight reduction is hindered.

According to the present invention, the impact absorbing portion of the impact bar and the mounting portion to the door frame, which extend in the front-rear direction of the vehicle and increase the door rigidity against a side collision, are formed by an integral tubular member, so that the impact bar itself is formed. It is an object of the present invention to provide a vehicle door structure that can achieve both improvement in rigidity and simplification of impact bar production, and can reduce the number of parts and the number of assembly steps.

[0012]

A vehicle door structure according to the present invention includes a door frame forming an outer frame of a vehicle door, and an impact bar provided in the door frame and extending in the front-rear direction of the vehicle. The impact bar has a rod-shaped shock absorbing portion and a mounting portion attached to the door frame, and the impact absorbing portion and the mounting portion are formed by an integral tubular member. Things.

The tubular member having the above structure can be set to a tubular member formed by tube hydroforming, but is not limited to this. Further, the vehicle door structure having the above configuration can be applied to both the front door and the rear door.

According to the above construction, since the rod-shaped shock absorbing portion and the mounting portion of one or more impact bars are integrally formed by an integral tubular member, the rigidity of the impact bar itself is improved and the production of the impact bar is simplified. And the number of parts and the number of assembling steps can be reduced.

In one embodiment of the present invention, the impact bar has a plurality of bar-shaped shock absorbing portions offset vertically and a mounting portion mounted on the door frame. The part is constituted by an integral tubular member.

According to the above construction, the door provided with a single impact bar can have a further increased door rigidity against a side collision, and a plurality of impact bars can be integrally formed by an integral tubular member. Therefore, both the improvement of the rigidity of the impact bar itself and the simplification of the production of the impact bar can be achieved, and the number of parts and the number of assembling steps can be significantly reduced.

In one embodiment of the present invention, the impact bar has a rod-shaped shock absorbing portion extending in the front-rear direction and the vertical direction and a mounting portion mounted on the door frame. And were constituted by an integral tubular member

According to the above structure, the door provided with a single impact bar can have a further increased door stiffness against a side collision, and, for example, a plurality of impact bars combined in a substantially T-shape can be used. Since the impact bar itself is integrally formed with the integral tubular member, the improvement of the rigidity of the impact bar itself and the simplification of the impact bar production can be achieved at the same time, and the number of parts and the number of assembling steps can be significantly reduced.

In one embodiment of the present invention, the mounting portion of the impact bar to the door frame is integrally formed in a flat plate shape. According to the above configuration, since the above-described mounting portion is formed in a flat plate shape, it is possible to improve the attachment property of the impact bar to the door frame and the mounting strength.

In one embodiment of the present invention, the door frame includes at least a lower side, and a frame having a front side and a rear side rising from front and rear of the lower side. The part, the rear part, and the lower part are joined to each other.

According to the above configuration, since the impact bar is joined to each of the front side, the rear side, and the lower side of the door frame, the strength of the door itself can be improved.

In one embodiment of the present invention, the impact bar is constituted by a tubular member formed by tube hydroforming. According to the above configuration, the impact bar can be formed of a high-rigidity continuous integral part by hydroforming, and the cross-sectional shape, plate thickness and strength of the tubular member can be set freely and arbitrarily. It is possible to achieve both reduction in weight and improvement in assemblability.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawings show a door structure of a vehicle. In FIGS. 1 and 2, a door inner provided with a substantially concave door frame 11 (door frame body) and a panel portion 12 that form an outer frame of a vehicle door are shown. A panel 13 is provided. Here, the door frame 11 is made of a steel plate that is thicker than the panel portion 12 because of the attachment of a hinge described later.

The above-described door frame 11 includes a lower side portion 14 extending in the front-rear direction of the vehicle, a front side portion 15 rising from a front portion of the lower side portion 14, and a rear side portion 16 rising from a rear portion of the lower side portion 14. Are formed in the concave frame portion.

A door upper hinge 17 and a door lower hinge 18 are attached to the front portion of the front side 15 with respect to the attachment portions 15U and 15D. (Shown) is pivotally supported on the vehicle body so that it can be opened and closed.

A door outer panel 19 is joined to the outside of the door inner panel 13 by a joining means such as hemming, while a door sash 20 is integrally provided at the upper portion.

An audio speaker 22 is disposed in an opening 21 formed in the lower front portion of the panel section 12, while a glass guide 23 provided in a front portion of the door internal space and a glass guide 23 provided in the door internal space. A door window glass 25 configured to be able to move up and down along with a glass sub guide 24 provided at the rear is provided.

A carrier plate 26 is attached to the lower part of the above-mentioned door window glass 25. When the motor 27 is driven, the carrier plate 26 moves up and down along the regulator 28, thereby providing a power window regulator for raising and lowering the door window glass 25. Make up.

As shown in FIGS. 1 and 2, an impact bar 29 is provided in the door frame 11 and extends in the front-rear direction of the vehicle. This impact bar 29
The impact bar 29 is made of a tubular member formed by a tube hydroform using a high-tensile steel pipe, and is vertically offset. An upper impact bar 30 and a lower impact bar 31 are provided.

As shown in an enlarged perspective view in FIG. 3, the above-described upper impact bar 30 has an impact bar body 30a as a rod-shaped shock absorbing portion extending in the front-rear direction of the vehicle, and a front portion of the impact bar body 30a. And a mounting portion 32 formed integrally with the rear portion of the impact bar main body 30a and also serving as a rear mounting portion for both of the upper and lower impact bars 30, 31.

The lower impact bar 31 is formed integrally with an impact bar body 31a as a rod-shaped shock absorbing portion extending obliquely in the front-rear direction of the vehicle in a front-rear and rear-height manner, and at the front of the impact bar body 31a. Mounting part 31b
And an attachment portion 32 integrally formed at the rear portion of the impact bar main body portion 31a and serving also as a rear attachment portion for both of the upper and lower impact bars 30, 31. Thus,
Each of these elements 30b, 30a, 32, 31a, 31
b, that is, the entire impact bar 29 is integrally formed by hydroforming.

Here, the sectional structure of the impact bar main body 30a in the upper impact bar 30 is formed in a cylindrical shape as shown in FIG. The sectional structure of the impact bar main body 31a in the lower impact bar 31 is the same as that in FIG.

Further, as shown in FIG. 5, the cross-sectional structure of the mounting portion 32 for vertically connecting the impact bar body portion 30a of the upper impact bar 30 and the impact bar body portion 31a of the lower impact bar 31 on the rear side is flat. It is formed in a flat plate shape. Note that the other mounting portions 30b, 31b
Is the same as that in FIG.

The impact bar 29 configured as described above
Are joined to the front side 15, the rear side 16 and the lower side 14 of the door frame 11, respectively, to improve the rigidity of the door frame 11.

FIG. 6 is a cross-sectional view taken along the line CC of FIG. 2, and the mounting portion 30b of the upper impact bar 30 formed in a flat plate shape has a stepped portion of the front side portion 15 as shown in FIG. Portion 15a (However, surface facing door outer panel 19)
The mounting portion 32 is similarly joined to the step portion 16a of the rear side portion 16 by laser welding means.

As described above, the vehicle door structure of the embodiment shown in FIGS. 1 to 7 has the door frame 11 forming the outer frame of the vehicle door, and the door frame 11 provided in the door frame 11 in the longitudinal direction of the vehicle. The impact bar 29 includes impact bar bodies 30a, 31a as shock absorbing portions and mounting portions 30b, 31b, which are attached to the door frame 11.
32, and each of these elements 30a, 31a, 30b,
31b and 32 are constituted by an integral tubular member.

As described above, since the impact bar 29 is integrally formed by an integral tubular member, the rigidity of the impact bar 29 itself can be improved and the production of the impact bar 29 can be simplified. The man-hour can be reduced.

In addition, the upper impact bar 30 and the lower impact bar 3 constituting the impact bar 29
Reference numerals 1 denote impact bar main bodies 30a and 31 as a plurality of rod-shaped shock absorbing portions provided in a vertically offset manner.
a and an attachment portion 30 attached to the door frame 11
b, 31b and 32 are constituted by an integral tubular member.

According to this structure, the rigidity of the door against side collision can be further increased as compared with the case where a single impact bar is provided.
Since 0 and 31 are integrally formed by an integral tubular member,
The improvement of the rigidity of the impact bars 30 and 31 itself and the simplification of the production of the impact bars can be achieved at the same time, and the number of parts and the number of assembling steps can be significantly reduced.

The impact bar 29 is attached to the door frame 11 and the impact bar 29 is
Mounting portions 30b, 31b,
Numeral 32 denotes a plate integrally formed. As described above, since the mounting portions 30b, 31b, and 32 are formed in the shape of a flat plate, it is possible to improve the attachment property of the impact bar 29 to the door frame 11 and the attachment strength.

Further, the door frame 11 includes a frame having at least a lower side portion 14 and a front side portion 15 and a rear side portion 16 rising from both front and rear portions of the lower side portion 14, and the impact bar 29 is provided at the front side. It is joined to each side of the side 15, the rear side 16 and the lower side 14.

As described above, the mounting portions 30 b, 32, 31 of the impact bar 29 are provided for the front side portion 15, the rear side portion 16, and the lower side portion 14 of the door frame 11.
Since b is joined, the strength of the door frame 11 to the door itself can be improved.

Moreover, the impact bar 29 including the upper impact bar 30 and the lower impact bar 31 described above.
Is formed into one part by a tubular member formed by a tube hydroform. As described above, the impact bar 29 can be formed of a high-rigidity continuous integral part by hydroforming, and the cross-sectional shape, plate thickness, and strength of the tubular member can be freely and arbitrarily set, and in addition, light weight It is possible to achieve both compatibility and improvement of the assemblability.

FIG. 8 shows another embodiment of the vehicle door structure. In the previous embodiment shown in FIG.
0, and the lower impact bar 31 on the rear side of each bar 30,
Although a common mounting portion 32 is provided for the upper impact bar 30 and the lower impact bar 31, a common mounting portion 33 is provided on the front side of the upper impact bar 30 and the lower impact bar 31 in FIG.

That is, the above-described upper impact bar 30
Is an impact bar body 30a extending in the front-rear direction of the vehicle at a position close to the belt line portion, and a mounting portion 30 formed integrally with a rear portion of the impact bar body 30a.
c, and a mounting part 33 integrally formed on the front part of the impact bar main body part 30a and also serving as a front side mounting part of both the upper and lower impact bars 30, 31.

The lower impact bar 31 is formed in the impact bar main body 3 which extends obliquely in the front-rear direction of the vehicle in a front-to-back and rear-to-back direction.
1a, a mounting portion 31c formed integrally with a rear portion of the impact bar main body 31a, and an impact bar main body 3
The upper and lower impact bars 3 are integrally formed at the front of
And a mounting portion 33 also serving as both front side mounting portions 0 and 31. Thus, each of these elements 30c,
30a, 33, 31a, 31c, that is, the entire impact bar 29 is integrally formed by hydroforming.

Further, the impact bar main bodies 30a and 31a as the shock absorbing portions are formed in the same cylindrical cross section as in FIG. 4, and the mounting portions 30c, 31c and 33 have the same cross sectional shape as in FIG. The mounting portion 33 is formed into a flat plate shape, and the mounting portion 33 is joined to the step portion 15a of the front side portion 15 by laser welding, and the mounting portions 30c and 31c are connected to the rear side portion 16a.
Are joined to the step 16a by laser welding.

By arranging the upper impact bar 30 close to the belt line in this way, it is possible to prevent buckling of the central portion of the door and suppress the amount of movement of the door itself.
In this embodiment shown in FIG. 8, the other configurations, operations, and effects are almost the same as those of the previous embodiment shown in FIGS. 1 to 7, and therefore, in FIG. Are denoted by the same reference numerals, and a detailed description thereof will be omitted.

FIG. 9 shows still another embodiment of a vehicle door structure, in which a total of two impact bars, an upper impact bar 34 and a lower impact bar 35, each constituted by a tubular member made of tube hydroform, are viewed from the side. Are combined in a substantially T-shape.

That is, the above-described upper impact bar 34
Is an impact bar body 34a as an impact absorbing portion extending in the front-rear direction of the vehicle;
mounting portions 34b, 34c integrally formed on both front and rear portions of
And a connecting portion 34d integrally formed at an intermediate portion of the impact bar main portion 34a.

The lower impact bar 35 includes an impact bar body 35a as a shock absorbing portion extending in the vertical direction of the vehicle, a connecting portion 35b integrally formed on the upper portion of the impact bar body 35a, and an impact bar body 3
5a, and a mounting portion 35c integrally formed at a lower portion of the lower portion 5a.

The components 34a, 34b, 34c and 34d of the upper impact bar 34 are integrally formed by hydroforming, while the lower impact bar 35 is formed.
Are integrally formed by hydroform molding.

Further, each of the mounting portions 34b, 34c, 3
5c and each of the connecting portions 34d and 35b are formed in a flat plate shape similar to that of FIG. 5, and each of the impact bar main portions 34a and 35a is formed in a cylindrical shape similar to that of FIG. Then, the connecting portion 34d of the upper impact bar 34 and the connecting portion 35b of the lower impact bar 35 are joined to each other by laser welding, and the mounting portion 35c of the lower impact bar 35 is joined to a floor cross member (a so-called No. 2 cross member). ).

The mounting portion 34b is joined to the step portion 15a of the front side portion 15 by laser welding, the attachment portion 34c is joined to the step portion 16a of the rear side portion 16 by laser welding, and the attaching portion 35c is connected to the door. It is joined to the step portion 14a of the lower side portion 14 by laser welding so as to face the floor cross member when closed.

As described above, the two impact bars 34,
When the mounting portions 35c are arranged so as to face a floor cross member (so-called No. 2 cross member), the impact load can be transmitted to the floor cross member at the time of a side collision. Therefore, the amount of the door that enters the vehicle interior can be reduced.

In this embodiment shown in FIG.
Other configurations, operations, and effects are almost the same as those of the previous embodiments, and therefore, in FIG. 9, the same portions as those in the previous drawings are denoted by the same reference numerals, and detailed description thereof will be omitted.

In correspondence between the configuration of the present invention and the above-described embodiment, the plurality of impact bars of the present invention are the upper impact bar 30 and the lower impact bar 3 of the embodiment.
1, and similarly, the impact absorbing member corresponds to the impact bar main body 30a, 31a, 34a, 35a, but the present invention is not limited to only the configuration of the above-described embodiment. For example, in each of the embodiments described above, the embodiment in which the door structure of the vehicle is applied to the front door is exemplified. However, it is needless to say that this may be applied to the rear door.

[0058]

According to the present invention, the impact absorbing portion and the mounting portion of the impact bar extending in the front-rear direction of the vehicle and increasing the door rigidity against a side collision are formed by an integral tubular member. It is possible to achieve both improvement in rigidity and simplification of impact bar production, and also to reduce the number of parts and the number of assembling steps.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part showing a door structure of a vehicle according to the present invention.

FIG. 2 is a side view of the door structure shown with the door outer panel removed.

FIG. 3 is a perspective view of an impact bar.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view taken along line BB of FIG. 3;

FIG. 6 is a sectional view taken along line CC of FIG. 2;

FIG. 7 is a sectional view taken along line DD in FIG. 2;

FIG. 8 is a side view showing another embodiment of the vehicle door structure of the present invention.

FIG. 9 is a side view showing still another embodiment of the vehicle door structure of the present invention.

FIG. 10 is an exploded perspective view of a main part showing a door structure of a conventional vehicle.

FIG. 11 is a side view of the conventional structure shown with the door outer panel removed.

FIG. 12 is an exploded perspective view of a conventional impact bar.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Door frame 14 ... Lower side part 15 ... Front side part 16 ... Rear side part 29 ... Impact bar 30 ... Upper impact bar 31 ... Lower impact bar 30a, 31a, 34a, 35a ... Impact bar main body part (impact absorption part) 30b .., 31b, 32 mounting part 30c, 31c, 33 mounting part 33 upper impact bar 34 lower impact bar 34b, 34c, 35c mounting part

Claims (6)

[Claims] 1. A vehicle door structure comprising: a door frame forming an outer frame of a vehicle door; and an impact bar provided in the door frame and extending in the front-rear direction of the vehicle. A door structure for a vehicle, comprising: a rod-shaped shock absorbing portion; and a mounting portion mounted to the door frame, wherein the shock absorbing portion and the mounting portion are formed by an integral tubular member. 2. The impact bar has a plurality of bar-shaped shock absorbing portions provided vertically offset from each other and a mounting portion mounted on the door frame, and the impact absorbing portion and the mounting portion are integrally formed in a tubular member. The vehicle door structure according to claim 1, wherein the vehicle door structure comprises: 3. The impact bar has a rod-shaped shock absorbing portion extending in the front-rear direction and the vertical direction, and a mounting portion mounted on the door frame, wherein the shock absorbing portion and the mounting portion are formed as an integral tubular member. The vehicle door structure according to claim 1 or 2, wherein: 4. The vehicle door structure according to claim 1, wherein the mounting portion of the impact bar to the door frame is integrally formed in a flat plate shape. 5. The door frame has at least a lower side portion,
4. A frame having a front side and a rear side rising from front and rear of the lower side, wherein the impact bar is joined to the front side, the rear side and the lower side, respectively. Or a vehicle door structure according to 4. 6. The vehicle door structure according to claim 1, wherein said impact bar is constituted by a tubular member formed by tube hydroforming.