JP2006219050A - Reinforcing structure for vehicular door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing structure for a vehicular door, capable of increasing reinforcing effect to an input load. <P>SOLUTION: In this reinforcing structure for a vehicular door 4, a reinforcing member 17 is provided along the vertical direction of the vehicle on the inner side of a door outer panel 5 swollen outward in the car width direction roughly in a bow shape in the vertical direction of the vehicle. The reinforcing member 17 is formed to become gradually thinner from a top P at a position corresponding to the most outward part of the door outer panel 5 upward and downward. It is disposed in such a way that an upper end 20 overlaps with a waist part reinforcement 10 of the door 4, and a lower end 22, with a side sill 16 of a vehicle main body. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure for reinforcing a door of a vehicle such as an automobile.

  2. Description of the Related Art Conventionally, a structure in which a reinforcing member is disposed between a door outer panel and a door inner panel in order to reinforce a door of a vehicle such as an automobile is known (see, for example, Patent Document 1).

  In the reinforcing structure described in Patent Document 1, a reinforcing plate including a flat plate extending in the vehicle front-rear direction and a bulging portion bulging outward in the vehicle width direction in a space between the door outer panel and the door inner panel. A plate is disposed so as to face each other with the reinforcing plate being on the outside in the vehicle width direction, and a reinforcing side beam is fixed inside the bulging portion by welding.

However, in such a conventional reinforcing structure, the inner side surface of the side beam in the vehicle width direction is formed vertically by a flat plate, and the side beam does not cover the side sill of the vehicle. When an impact load is applied from the side of the vehicle (from a direction perpendicular to the axial direction of the side sill), the vehicle door easily curves inward, and the impact load is not transmitted to the side sill. The reaction force at the side of the vehicle cannot be obtained sufficiently, and as a result, the interior of the vehicle such as the floor may be greatly deformed.
JP-A-6-115350

  This invention is made | formed in view of such a problem, and makes it the subject to provide the reinforcement structure of the door for vehicles which can heighten the reinforcement effect with respect to the input load.

  In order to solve such a problem, the invention according to claim 1 is a reinforcing member along the vehicle vertical direction inside the door outer panel that bulges outward in the vehicle width direction in a substantially bow shape in the vehicle vertical direction. A reinforcing structure for a vehicle door, wherein the reinforcing member is gradually thinned vertically from the apex corresponding to the outermost portion of the door outer panel, and the upper end is a waist portion of the vehicle door. It is characterized by being arranged so as to overlap the reinforcement and the lower end of the side sill of the vehicle body.

  According to a second aspect of the present invention, in the vehicle door reinforcing structure according to the first aspect, a front end of the reinforcing member in the vehicle front-rear direction is connected to a door hinge via a hinge bracket, and a rear end is the vehicle. It is characterized by overlapping with the main body.

  According to a third aspect of the present invention, in the vehicle door reinforcing structure according to the first or second aspect, the reinforcing member is hollow, and a rib is provided in the hollow space in the vehicle width direction. It is characterized by.

  According to a fourth aspect of the present invention, in the vehicle door reinforcing structure according to any one of the first to third aspects, the upper end of the reinforcing member is connected to the waist portion reinforcement via a connecting bracket. It is characterized by being.

  According to a fifth aspect of the present invention, in the vehicle door reinforcing structure according to any one of the first to fourth aspects, the lower end of the reinforcing member is close to the door inner panel facing the door outer panel. It is in the position to do.

  According to the first aspect of the present invention, the vehicle door can ensure sufficient bending rigidity from the initial stage when the obstacle hits, and can easily impact the vehicle in the vertical direction, further to the west portion reinforcement and the side sill. Can be transmitted. In addition, since the area in contact with the obstacle increases as the reinforcing member is deformed according to the impact load, it is possible to obtain a sufficient reaction force in the entire vehicle side portion and to maintain this reaction force. As a result, the inside of the vehicle is not greatly deformed, the deformation is suppressed as much as possible, and the reinforcing effect against the impact load can be enhanced by the reinforcing structure.

  According to the invention of claim 2, the impact load is transmitted from the front end to the vehicle main body via the door hinge and the hinge bracket, and from the rear end to the vehicle main body. Therefore, a sufficient reaction force can be obtained even in the vehicle front-rear direction, and the reinforcing effect against the input load can be further enhanced.

  According to the invention of claim 3, it is possible to reduce the weight while ensuring sufficient bending rigidity. Further, since the impact load can be efficiently distributed in the vehicle vertical direction, the deformation of the vehicle door can be suppressed as much as possible.

  According to the fourth aspect of the present invention, it is possible to reliably transmit the collision load from the reinforcing member to the waist portion reinforcement through the upper end.

  According to the invention of claim 5, since the impact load is transmitted to the side sill from the initial stage when it hits the obstacle, the amount of transmission is correspondingly increased and a large external force is transmitted to the inside of the vehicle more effectively. It becomes possible to stop.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a view showing a reinforcing structure of a vehicle door according to an embodiment of the present invention. This reinforcing structure is used, for example, for a vehicle side front door (vehicle door) 4 attached to a vehicle body 2 of an automobile by a door hinge (not shown). The door 4 is formed of a door outer panel 5 and a door inner panel 6 facing the door outer panel 5, and can be moved up and down in a space 7 between the door outer panel 5 and the door inner panel 6. A window glass (not shown) is housed. A cylindrical waist portion reinforcement 10 extends in the vehicle front-rear direction at the upper end 9 of the door 4.

  The door outer panel 5 bulges outward in the vehicle width direction in a substantially bow shape in the vehicle vertical direction, and when the door 4 is closed, the lower end 15 of the door outer panel 5 is formed on the side sill 16 extending in the vehicle front-rear direction of the vehicle body 2. The rear end 11 of the door outer panel 5 in the vehicle front-rear direction overlaps and overlaps with a center pillar (not shown) extending in the vehicle vertical direction.

  In the space 7, for example, when a shock load is applied from the side of the vehicle by hitting a pole (from a direction perpendicular to the axial direction of the side sill 16), the reinforcement is a rigid metal plate for relaxing the shock load. A member 17 is provided close to the door outer panel 5.

  The outer surface 18 of the reinforcing member 17 has a substantially bow shape along the door outer panel 5 in the vehicle vertical direction, while the inner surface 19 of the reinforcing member 17 has a substantially bow shape with a smaller curvature than the outer surface 18. The thickness of the reinforcing member 17 (thickness from the outer surface 18 to the inner surface 19) is the point P at the apex of the reinforcing member 17 (the portion corresponding to the outermost portion of the door outer panel 5, that is, the outermost surface 18). The thickness T1 (see FIG. 3 (b)) of the location located outside the vehicle (the location of the apex of the bow-shaped curve of the outer surface 18) is the thickest, and the distance from the apex location P increases upward or downward. The wall thickness gradually becomes thinner. Since both the outer surface 18 and the inner surface 19 of the reinforcing member 17 are curved surfaces, the layout of other units (not shown) arranged in the space 7 of the door 4 is not hindered and the vehicle is smoothly moved in the vertical direction. Can be thinned.

  In this way, the reinforcing member 17 has an arcuate shape, the thickness T1 of the apex portion P is maximized, and the thickness gradually decreases from the apex portion P in the vertical direction. Both the upper end 20 and the lower end 21 of the member 17 are thin (thickness T2 and thickness T3 shown in FIG. 3B) and extend from the upper end 9 of the door 4 to the lower end 22 (lower end 15 of the door outer panel 5). ing. That is, the upper end 20 of the reinforcing member 17 overlaps the waist portion reinforcement 10 from the outside in the vehicle width direction, and the lower end 21 overlaps the side sill 16 of the vehicle body 2 when the door 4 is closed. It has become.

  On the other hand, the front end 23 and the rear end 24 of the reinforcing member 17 in the vehicle front-rear direction extend to the front end 25 and the rear end 26 (the rear end 11 of the door outer panel 5) of the door 4, respectively. It is connected to a door hinge via a hinge bracket 27 shown in FIG. The hinge bracket 27 has a mounting wall 28 and a mounting wall 29 extending in directions orthogonal to each other, and bolt holes 30 and 31 are formed in the mounting walls 28 and 29, respectively. The bolt 32 is inserted into the bolt hole 30 and the hinge bracket 27 is screwed onto the door 4 together with the reinforcing member 17, and the bolt 33 is inserted into the bolt hole 31 to screw the hinge bracket 27 onto the door hinge. As a result, the front end 23 of the reinforcing member 17 is attached to the door hinge, and the door 4 is attached to the vehicle body 2 via the door hinge. The rear end 24 of the reinforcing member 17 overlaps and overlaps the center pillar of the vehicle body 2 when the door 4 is closed. In this way, the reinforcing member 17 extends in the vehicle front-rear direction, thereby reliably covering a position corresponding to the boarding position of a passenger such as a driver.

  When a vehicle having such a reinforced door 4 hits an obstacle such as a pole from the side, the door 4 receives an impact load from a direction orthogonal to the axial direction of the side sill 16. The load is first applied to the bow-shaped apex portion of the door outer panel 5, and the apex portion of the door outer panel 5 corresponds to the apex portion P in the reinforcing member 17.

  Here, since a high bending rigidity is required at the apex portion P where the impact load is first applied in the reinforcing member 17, a sufficiently thick wall thickness T1 is required, but in the left diagram of FIG. As shown in the figure, when the thickness T1 is uniformly arranged in the vehicle vertical direction, there is no support point for impact load, and the side sill 16 and the waist portion 10 cannot be used for wrapping. The impact load cannot be transmitted to the west portion of the reinforcement 10. On the other hand, as shown in the right figure of FIG. 3A, the thickness T2 of the upper end 20 serving as a lapping allowance with the waist portion reinforcement 10 and the thickness T3 of the lower end 21 serving as a lapping allowance with the side sill 16 are set to the upper and lower sides of the vehicle. If it is uniformly arranged in the direction, the bending rigidity at the initial stage when the obstacle hits is insufficient, and sufficient reaction force cannot be obtained at the side of the vehicle, and the interior of the vehicle such as the floor is greatly deformed. End up.

  On the other hand, in the reinforcing structure of the door 4, the reinforcing member 17 has a bow shape, as shown in FIG. The portion P of the reinforcing member 17 is gradually thinned in the vertical direction (thickness T1> thickness T2, T3), whereby the lower end 21 of the reinforcing member 17 is the side sill 16 and the upper end 20 is the waist portion. It is possible to easily overlap the reinforcement 10 from the outside in the vehicle width direction.

  Accordingly, the reinforcing structure of the door 4 has the highest bending rigidity at the apex portion P of the reinforcing member 17 and overlaps the waist portion reinforcement 10 and the side sill 16 while gradually decreasing the bending rigidity in the vertical direction. Therefore, the door 4 can ensure sufficient bending rigidity from the initial stage when the obstacle hits, and can easily impact the vehicle in the vertical direction and further to the west reinforcement 10 and the side sill 16. Can be transmitted. Furthermore, since the area in contact with the obstacle increases as the reinforcing member 17 is deformed in response to the impact load, a sufficient reaction force can be obtained and maintained in the entire vehicle side portion. As a result, the inside of the vehicle is not greatly deformed, the deformation is suppressed as much as possible, and the reinforcing effect against the impact load can be enhanced by the reinforcing structure.

  Further, the front end 23 of the reinforcing member 17 is attached to the door hinge via the hinge bracket 27, and the rear end 24 overlaps and covers the center pillar of the vehicle body 2 when the door 4 is closed. The impact load is transmitted from the front end 23 to the front pillar (not shown) of the vehicle body 2 via the door hinge and the hinge bracket 27 and from the rear end 24 to the center pillar. Therefore, a sufficient reaction force can be obtained even in the vehicle front-rear direction, and the reinforcing effect against the input load can be further enhanced.

  As a modification of the present embodiment, for example, the reinforcing member 40 shown in FIG. 4A or the reinforcing member 41 shown in FIG. 4B may be used in addition to the reinforcing member 17 described above. The reinforcing member 40 and the reinforcing member 41 are both produced by extruding a light alloy such as an aluminum alloy, and the space between the outer wall 42 on the outer side in the vehicle width direction and the inner wall 43 on the inner side becomes hollow. A plurality of ribs are provided between the outer wall 42 and the inner wall 43 in the vehicle width direction. Specifically, the ribs 44 of the reinforcing member 40 are disposed horizontally, and the ribs 45 of the reinforcing member 41 have a truss structure. By using the reinforcing member 40 or the reinforcing member 41, it is possible to reduce the weight while ensuring sufficient bending rigidity. Further, since the impact load can be efficiently distributed in the vertical direction of the vehicle, the deformation of the door 4 can be suppressed as much as possible.

  On the other hand, as another modification, for example, the lower end 21 of the reinforcing member 17 (or the reinforcing members 40 and 41) may be brought close to the door inner panel 6 side as shown in FIG. As a result, since the impact load is transmitted to the side sill 16 from the initial stage when it hits an obstacle, it is possible to more effectively prevent a large external force from being transmitted to the inside of the vehicle by the corresponding amount of transmission. It becomes.

  As still another modification, at least a part of the upper end 20 of the reinforcing member 17 (or the reinforcing members 40 and 41) may be connected to the waist portion reinforcement 10. In particular, when the reinforcing member 40 or the reinforcing member 41 is used, the upper end 20 of the reinforcing member 40 may have an open cross section opened upward. In this case, the connecting bracket 48 shown in FIG. 6 is disposed between the waist portion reinforcement 10 and the reinforcing members 40 and 41, and the upper end 20 is fastened while fastening the waist portion reinforcement 10 and the reinforcing members 40 and 41. The opening is closed with a connecting bracket 48 to obtain a closed cross section. That is, the connecting bracket 48 includes a horizontal wall 49, an upper wall 50 extending upward from one end of the horizontal wall 49, and a lower wall 51 extending downward from the other end of the horizontal wall 49. The upper wall 50 is a waist portion. The reinforcement 10 and the lower wall 51 are fixed to the reinforcing members 40 and 41 (inner wall 43), respectively, whereby the waist portion reinforcement 10 and the reinforcing members 40 and 41 are fastened, while the horizontal wall 49 is By covering the opening of the upper end 20, the horizontal wall 49, the outer wall 42 and the inner wall 43 of the reinforcing members 40 and 41, and the rib 44 or the rib 45 form a closed cross section. At this time, the outer wall 42 overlaps the waist portion reinforcement 10 and covers the waist portion reinforcement 10 from the outside in the vehicle width direction.

  By connecting the waist portion reinforcement 10 and the reinforcing members 17, 40, 41 in this way, it is possible to reliably transmit a collision load from the reinforcing members 17, 40, 41 to the waist portion reinforcement 10 through the upper end 20. It becomes.

  The present invention is not limited to the above-described embodiment. For example, in the present embodiment, the reinforcing structure is described as being used for the front door. However, the present invention is not limited thereto, and may be used for the rear door, for example. .

The reinforcement structure of the vehicle door which concerns on embodiment of this invention is shown, (a) is the figure which looked at the vehicle door from the vehicle width direction outer side, (b) is sectional drawing of AA position, (C) is a perspective view of the state which removed the door outer panel. A hinge bracket is shown, (a) is a perspective view of a state in which the hinge bracket is attached to a vehicle door, and (b) is a cross-sectional view at the BB position. It is a figure for comparatively explaining the thickness of a reinforcing member, (a) shows the reinforcement structure when the thickness of a reinforcing member is made uniform, (b) shows the thickness of a reinforcing member being thin in the vertical direction. 1 schematically shows the relationship between the reinforced structure of FIG. 1 and its bending rigidity. The modification of this Embodiment is shown, (a) is sectional drawing of the reinforcement structure using the reinforcement member provided with the horizontal rib, (b) is reinforcement using the reinforcement member provided with the rib of the truss structure It is sectional drawing of a structure. It is an expanded sectional view showing the neighborhood of the lower end of a reinforcing member as a modification of this embodiment. It is an expanded sectional view showing the neighborhood of the upper end of a reinforcing member as a modification of this embodiment.

Explanation of symbols

2 Vehicle body 4 Front door (vehicle door)
5 Door outer panel 6 Door inner panel 10 West portion reinforcement 16 Side sill 17, 40, 41 Reinforcement member 20 Upper end 21 Lower end 23 Front end 24 Rear end 27 Hinge bracket 44, 45 Rib 48 Connection bracket P Vertex

Claims (5)

A vehicle door reinforcement structure in which a reinforcement member is provided along a vehicle vertical direction inside a door outer panel that bulges outward in the vehicle width direction in a substantially bow shape in the vehicle vertical direction,
The reinforcing member is gradually thinned in the vertical direction from the apex corresponding to the outermost part of the door outer panel, the upper end is the waist portion of the vehicle door, the lower end is the side sill of the vehicle body, Reinforcement structure for vehicle doors, characterized in that they are arranged so as to overlap each other. The reinforcing structure for a vehicle door according to claim 1,
A reinforcing structure for a vehicle door, wherein a front end of the reinforcing member in the vehicle front-rear direction is connected to a door hinge via a hinge bracket, and a rear end overlaps the vehicle body. In the reinforcing structure for a vehicle door according to claim 1 or 2,
A reinforcing structure for a vehicle door, wherein the reinforcing member is hollow and ribs are provided in the hollow space in the vehicle width direction. In the reinforcement structure of the vehicle door of any one of Claims 1 thru | or 3,
A reinforcing structure for a vehicle door, wherein an upper end of the reinforcing member is connected to the waist portion reinforcement through a connecting bracket. In the reinforcement structure of the door for vehicles according to any one of claims 1 to 4,
A reinforcing structure for a vehicle door, wherein a lower end of the reinforcing member is located close to a door inner panel facing the door outer panel.

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