JP2005170066A - Door structure for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door structure for a vehicle in which a door hardly intrude into a cabin even when the side of the vehicle receives an impact such as a side collision. <P>SOLUTION: In the door structure for the vehicle, a door inner panel 2b and a door outer panel 2c are joined to each other, a reinforcement is arranged above the bottom 2e of the door inner panel 2b opposed to a door locker 7. The reinforcement 8 is joined to a door trim installation part 2f of the door inner panel 2b at by inner flange 8b on an indoor side. Thereby, the reinforcement 8 forms a closed cross section structure with the door inner panel 2b in a cross section defining the longitudinal direction of the vehicle as a normal direction and the intrusion of the door 20 into the cabin can be prevented as practical as possible even in the case of the side collision. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle door structure that prevents a door from entering a vehicle even when the vehicle receives an impact from the side.

  Various door structures are considered in consideration of the case where a bonnet of another vehicle typically collides with the vehicle when it receives an impact on the side of the vehicle, for example, a door (for example, Patent Documents 1 to 3).

FIG. 5 is a partial side view schematically showing a vehicle as a background art, and FIG. 6 is a cross-sectional view taken along line XX of FIG. In the figure, Fr indicates the vehicle front direction, INN indicates the indoor direction, and UPR indicates the vertically upward direction.
The door 21 of the vehicle 20 includes, on the indoor side, a door front side thick plate portion 21a and a door inner panel 21b joined to the vehicle rear side of the door front side thick plate portion 21a. The door front side thick plate portion 21a and the door inner panel 21b are joined to the outdoor door outer panel 21c. The door 21 forms a space surrounded by the door front side thick plate portion 21a, the door inner panel 21b, and the door outer panel 21c. In this space, an impact beam 22 is arranged in the longitudinal direction of the vehicle. The front end of the impact beam 22 is fixed to the front side surface of the door front side thick plate portion 21a via a predetermined bracket 23. The rear end of the impact beam 22 is fixed to the rear side surface of the door inner panel 21b via a predetermined bracket 23. The door front side thick plate portion 21a is rotatably attached to the front pillar 24 via a hinge (not shown). The impact force at the time of a frontal collision with another vehicle is transmitted to the center pillar 25 via the impact beam 22. Reinforcement 21d is joined to each of the door inner panel 21b and the door outer panel 21c in the upper part of the space, thereby reinforcing the strength of the door 21. When the door 21 is closed, the door locker 26 is positioned below the door 21. The door locker 26 is formed by joining a locker outer panel 26a and a locker inner panel 26b.

A case will be described where another vehicle collides with the vehicle 20 equipped with the door 21 having the above configuration. A solid line in FIG. 6 indicates a normal state of the door 21 before the side collision, and a two-dot broken line indicates a deformed state of the door 21 after the side collision. In the figure, the other vehicle that collides with the vehicle 20 is indicated by a carriage 30. The cart 30 is used in a collision test, and the lower end position of a deformable barrier (MDB, Moving Deformable Barrier) mounted on the front side of the cart 30 is, as shown in FIG. 6, the bottom 21e at the lower end of the door inner panel 21b. That is, it is vertically above the bottom surface of the enclosed space, or at substantially the same level.
When the cart 30 collides with the vehicle 20, the door outer panel 21 c is greatly recessed below the impact beam 22 toward the indoor side, and the door outer panel 21 c changes to the indoor side. Further, the door inner panel 21b also enters the indoor side without being restrained by the upper end joint flange 26c of the door locker 26.

JP-A-6-156081 JP-A-7-125655 JP 2000-318451 A

  In the vehicle door structure shown in FIGS. 5 and 6, there is little or almost no overlap between the upper end of the door locker 26, that is, the upper end joining flange 26c and the lower end of the deformable barrier. For this reason, when the cart 30 imitating another vehicle collides sideways, there is a problem that the door 21 passes through the door locker 26 and greatly enters the room.

  Accordingly, an object of the present invention is to provide a vehicle door structure in which a door does not enter the room as much as possible even if a side collision occurs.

In order to achieve the above object, according to the present invention, in a vehicle door structure in which a door inner panel and a door outer panel are joined, a reinforcement is disposed above the bottom of the door inner panel facing the door locker. The attachment is joined to the door trim mounting portion of the door inner panel on the indoor side, and to the bottom of the door inner panel on the outdoor side. With this configuration, the reinforcement forms a closed cross-sectional structure with the door inner panel in a cross section whose normal direction is the front-rear direction of the vehicle. Therefore, in the case of a side collision, entry of the door into the room can be suppressed as much as possible.
Preferably, the front end of the reinforcement is joined to the bottom portion of the door front side thick plate portion joined on the vehicle front side of the door inner panel. With this configuration, even when a strong side collision is received on the front side of the door, entry of the door into the room can be suppressed as much as possible.
Preferably, the rear end of the reinforcement is joined to the bottom surface of the door inner panel facing the center pillar. With this configuration, even when the rear side of the door is subjected to a strong side collision, the door can be prevented from entering the room as much as possible.
Further, by adopting any of the above preferable configurations, the reinforcement forms a closed cross-sectional structure with the door inner panel and the door front side thick plate portion even with respect to the cross section whose normal direction is the vehicle width direction. Therefore, it is possible to enhance the suppression of the entry of the door into the room.

  In the vehicle door structure according to the present invention, the reinforcement is disposed in a space defined by the door inner panel and the door outer panel, so that a closed cross-sectional structure is formed by the bottom surface of the door inner panel. Thereby, even if a side collision occurs, the entry of the door into the room can be suppressed as much as possible. Also, in this space, the reinforcement is extended from the front thick plate portion to the location facing the center pillar, and joined to the front thick plate portion by the front end flange of the reinforcement, and at the rear end flange of the reinforcement Join the bottom of the door inner panel facing the center pillar. By each joining, the cross-sectional structure with the vehicle width direction as the normal direction also becomes a closed cross-sectional structure, so that even if a side collision occurs, entry of the door into the room can be further suppressed.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a side view schematically showing a door structure of a vehicle 1 that is the best mode for carrying out the invention, FIG. 2 is a schematic perspective view showing a part of the door structure of FIG. 1, and FIG. It is sectional drawing which follows the AA line | wire, (a) is each sectional drawing after a side collision, (b) is after each side collision. 4A is a cross-sectional view taken along line BB in FIG. 1, FIG. 4B is a cross-sectional view taken along line CC in FIG. 1, and FIG. 4C is a cross-sectional view taken along line DD in FIG. In the figure, Fr indicates the vehicle front direction, INN indicates the indoor direction, and UPR indicates the vertically upward direction.

  As shown in FIG. 2, the door 2 of the vehicle 1, which is the best mode for carrying out the present invention, is joined on the indoor side, as shown in FIG. 2, on the vehicle front side of the door front side thick plate portion 2 a. Door inner panel 2b. The door front side thick plate portion 2a and the door inner panel 2b are formed in a shape as shown in FIG. 2 so that various parts can be attached. The door front side thick plate portion 2a and the door inner panel 2b are joined to the door outer panel 2c on the outdoor side. The door 2 forms a space surrounded by the door front side thick plate portion 2a, the door inner panel 2b, and the door outer panel 2c. In this space, as shown in FIG. 1, the impact beam 3 is arranged in the longitudinal direction of the vehicle. The front and rear ends of the impact beam 3 are fixed to the front side surface of the door front side thick plate portion 2a and the rear side surface of the door inner panel 2b with predetermined brackets 4, respectively. The door front side thick plate portion 2a is rotatably attached to the front pillar 5 via a hinge (not shown). The impact force at the time of a frontal collision with another vehicle is transmitted to the center pillar 6 via the impact beam 3. Reinforcements 2d are joined to the door inner panel 2b and the door outer panel 2c above the space, respectively. The impact beam 3 and the reinforcement 2d reinforce the strength of the door 2.

By the way, when the door 2 is closed, the door locker 7 is positioned below the door 2. As shown in FIG. 3 and FIG. 4A, the door locker 7 is formed by joining a rocker outer panel 7a and a rocker inner panel 7b with respective upper end joining flanges 7c. Here, the rocker outer panel 7a has a predetermined step. For example, as shown in FIG. 3, the rocker outer panel 7a may have a two-step difference between a first corner 7a1 on the indoor side and a second corner 7a2 on the outdoor side. Moreover, as shown to Fig.4 (a), you may make it the rocker outer panel 7a have the 3rd corner 7a3 in the middle of the 1st corner 7a1 of an indoor side, and the 2nd corner 7a2 of an outdoor side. That is, the rocker outer panel 7a may have three steps.
The bottom 2e of the door inner panel 2b of the door 2 has a shape corresponding to each step of the rocker outer panel 7a. For example, as shown in FIG. 3 and FIG. 4A, the bottom 2e of the door inner panel 2b has a joint 2b1 and a plurality of corners 2b2 joined to the door outer panel 2c.

In the present invention, the reinforcement 8 is provided in the space defined by the door front thick plate portion 2a, the door inner panel 2b and the door outer panel 2c and above the bottom 2e of the door inner panel 2b facing the door locker 7. Is arranged.
The cross-sectional view taken along the line BB shown in FIG. 4A is a cross-sectional view of the surface of the reinforcement 8 whose normal direction is the vehicle front-rear direction. As shown in the figure, the reinforcement 8 is joined to the bottom 2e of the door inner panel 2b on the outdoor side. That is, the reinforcement 8 is joined to the outer joint portion 2b3 of the door inner panel by the outer flange 8a. Here, the outer flange 8a is a flange extending in the vertical direction outside the reinforcement main body 8c, and the flange extending only downward as shown in FIG. 4A is also shown in FIG. A flange extending in the vertical direction may be used. Further, the outer joint portion 2b3 is a portion having an arbitrary vertical surface other than the joint portion 2b1 joined to the door outer panel 2c among a plurality of vertical surfaces forming the steps of the bottom portion 2e of the door inner panel 2b.
On the other hand, the reinforcement 8 is joined to the door inner panel 2 inside the vehicle. That is, the inner flange 8b of the reinforcement 8 is joined to the door trim mounting portion 2f. Here, the inner flange 8b is a flange extending in the vertical direction on the vehicle inner side of the reinforcement 8, and a flange extending only upward as shown in FIG. 4 (a), as shown in FIG. A flange extending in the vertical direction may be used. The door trim mounting portion 2f is a portion where a door trim (not shown) of the door inner panel 2 is mounted.

  As described above, the reinforcement 8 forms a closed cross-sectional structure with the door inner panel 2b in a cross section in which the front-rear direction of the vehicle is a normal direction. As will be described below, it is preferable that the reinforcement 8 forms a closed cross-sectional structure with the door inner panel 2b and the door front side thick plate portion 2a even in a cross section in which the vehicle width direction is a normal direction.

The reinforcement 8 extends to a position facing the center pillar 6 (center pillar lower) at the rear end of the door inner panel 2b.
4B is a cross-sectional view of a plane whose normal direction is the vertical direction. As shown in the figure, the reinforcement 8 is extended so as to partially overlap the center pillar 6. At this time, the reinforcement 8 is extended with the outer flange 8a and the inner flange 8b being extended. Here, the center pillar 6 is formed by joining a center pillar inner panel 6a and a center pillar outer panel 6b. The reinforcement 8 preferably extends to the corner 6c of the center pillar outer panel 6b.
As shown in FIG. 4C, the rear end of the reinforcement body 8c between the outer flange 8a and the inner flange 8b is joined to the curved door inner panel 2b by the rear flange 8d.

  The reinforcement 8 is preferably extended to the bottom 2a1 of the door front side thick plate 2a, that is, the vicinity of the bottom 2a1 joined to the bottom 2e of the door inner panel 2b. The reinforcement main body 8c preferably has the outer flange 8a and the inner flange 8b extending at both ends, and the reinforcement 8 extends to the bottom 2a1 and is joined to the bottom 2a1 and the front flange 8e. At this time, as shown in FIG. 2, the reinforcement 8 may be curved on the vehicle rear side along the bottom 2e of the door inner panel 2b, and may be provided with a step on the vehicle rear side of the front flange 8e and on the vehicle front side. .

  As described above, the reinforcement 8 is arranged in the longitudinal direction of the vehicle, joined to the bottom 2e1 by the front flange 8e, and joined to the surface facing the center pillar 6 of the door inner panel 2b by the rear flange 8d. To do. Thus, the reinforcement 8 forms a closed cross-sectional structure with the door inner panel 2b in a cross section in which the front-rear direction of the vehicle is a normal direction, and also in a cross section in which the vehicle width direction is a normal direction. A closed cross-sectional structure is formed by the inner panel 2b and the door front side thick plate portion 2a.

A case where another vehicle collides with the door 2 having the above configuration will be described.
3A is a cross-sectional view taken along the line AA before the side collision, and FIG. 3B is a cross-sectional view taken along the line AA after the side collision. In the same figure, the trolley | bogie 30 used in the collision test is shown instead of another vehicle similarly to FIG. The lower end position of the deformable barrier mounted on the carriage 30 is vertically above or substantially the same position as the bottom 2e of the door inner panel 2b, and vertically below the reinforcement body 8c.
When the cart 30 that imitates another vehicle in the normal state of FIG. 3A collides sideways, the door outer panel 2c is slightly deformed without being broken by the collision force. Further, the impact force is relieved by the closed cross-sectional structure formed by the door front side thick plate portion 2 a, the reinforcement 8 and the door inner panel 2 b, and bounces back to the carriage 30. Therefore, the door inner panel 2b is not displaced indoors from the upper end joint flange 7c of the door locker 6, and the amount of entry of the door 2 into the room at the time of a side collision is reduced as much as possible.

  As described above, according to the preferred embodiment of the present invention, the reinforcement 8 is disposed in the lower part of the space defined by the door front side thick plate portion 2a, the door outer panel 2c, and the door inner panel 2b. Therefore, the amount of door intrusion is reduced as much as possible even if it is hit by a side. Further, the front end of the reinforcement 8 is joined to the bottom 2a1 of the door front thick plate 2a by the front flange 8e, and the rear end of the reinforcement 8 is rearward of the bottom 2e of the door inner panel 2b facing the center pillar 6. It joins with the flange 8d. Thus, it is arranged so as to extend in the front-rear direction of the space, that is, from the door front side thick plate portion 2a to the opposing surface of the center pillar 6. Therefore, the impact force caused by the side collision can be received by the front-rear width of the door 2, and the amount of entry of the door is reduced as much as possible.

  It should be noted that the best mode of the present invention described above is only one mode of the present invention, and various modifications are possible within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say. Although the best mode of the invention described above has been described on the assumption that the front door is used, the invention can be similarly applied to a rear door.

It is the side view which showed typically the door structure of the vehicle which is the best form for implementing this invention. It is the schematic perspective view which showed partially the door structure of FIG. (A) is sectional drawing which follows the AA line | wire which showed the outline of the door structure before the other vehicle side impacts with respect to the vehicle which has the door structure of FIG. 1, (b) is the door structure after side impact. It is sectional drawing which follows the AA line | wire which showed the outline of deformation | transformation. (A) is sectional drawing which follows the BB line of FIG. 1, (b) is sectional drawing which follows the CC line of FIG. 1, (c) is sectional drawing which follows the DD line of FIG. It is a side view of the door of the vehicle which is background art. It is sectional drawing which showed the outline of the door before and behind which another vehicle collides with the vehicle equipped with the door of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Door 2a Door front side thick board part 2a1, 2e Bottom part 2b Door inner panel 2b3 Outer junction part 2c Door outer panel 2f Door trim mounting part 6 Center pillar 7 Door locker 8 Reinforcement 8a Outer flange 8b Inner flange 8c Reinforcement body 8d Rear Side flange 8e Front flange 30 Bogie

Claims (3)

In the door structure of a vehicle formed by joining a door inner panel and a door outer panel,
Reinforcement is arranged above the bottom of the door inner panel facing the door locker, and the reinforcement is joined to the door trim mounting portion of the door inner panel on the indoor side and to the bottom of the door inner panel on the outdoor side. The door structure of the vehicle characterized by doing.   2. The vehicle door structure according to claim 1, wherein a front end of the reinforcement is joined to a bottom portion of a door front side thick plate portion joined on a vehicle front side of the door inner panel. 3. The vehicle door structure according to claim 1, wherein a rear end of the reinforcement is joined to a bottom surface of the door inner panel facing the center pillar.

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