JP5768668B2 - Vehicle side door structure - Google Patents

Description

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

  2. Description of the Related Art Conventionally, there is known a vehicle side door structure in which a belt line reinforcement is provided at an upper end portion of a door outer panel of a side door to improve strength and rigidity of a door belt line portion of the side door. For example, in Patent Document 1 below, a beltline reinforcement (outer reinforcement) having a closed cross-sectional structure is fixed to an upper end portion of a door outer panel of a side door to improve the strength and rigidity of the door beltline portion of the side door. A vehicle side door structure is disclosed.

Japanese Patent Laid-Open No. 5-104951

  However, in the conventional structure, when a collision load due to a side collision is applied to the side door, the door outer panel is first deformed, and then, the deformed door outer panel comes into contact with the belt line reinforcement. In this case, if the door outer panel itself is bent and a fold line (deformation wrinkle) is formed in the door outer panel, the belt line reinforcement may be bent starting from the fold line. Therefore, if this broken line is formed at a portion facing the occupant seated on the seat, it is considered that the beltline reinforcement is bent at the side of the occupant.

  In view of the above facts, the present invention can provide a vehicle side door structure that can prevent beltline reinforcement from being bent at the side of an occupant when a collision load due to a side collision is applied to the side door. Is the purpose.

A vehicle side door structure according to a first aspect of the present invention includes a door outer panel that is disposed on the outer side in the vehicle width direction and forms a part of the side door, a vehicle interior side of the door outer panel, and an upper portion of the door outer panel. In addition to reinforcing the door belt line part of the side door, the part facing the occupant seated on the vehicle seat must have a larger amount of protrusion outward in the vehicle width direction than other parts. A belt line reinforcement formed with a bulging portion in which a gap between the door outer panel and the door outer panel is set to be narrow, and the belt line reinforcement includes a base portion extending in a vehicle longitudinal direction and a vertical direction, and the base portion The bulging portion that protrudes outward in the vehicle width direction from the upper end portion of the vehicle and the door outer panel that extends from the lower end portion of the base portion to the vehicle lower side through a step portion. A ridge line extending in the vehicle front-rear direction by forming the stepped portion at a portion between the base portion and the lower joint portion in the belt line reinforcement. Is formed .

  In the first aspect of the present invention, the amount of protrusion of the bulging portion at the outer side in the vehicle width direction at the portion facing the occupant seated on the vehicle seat is set larger than the amount of protrusion at the other portion. Therefore, the rigidity of the beltline reinforcement at the part facing the occupant is higher than that of other parts. Further, the distance between the bulging portion and the door outer panel in the portion facing the occupant is narrower than the distance between the bulging portion and the door outer panel in other portions. Therefore, even if a collision load due to a side collision is applied to the side door, the door outer panel abuts against the bulging portion without being greatly deformed at a portion facing the occupant. As a result, a broken line formed by bending the door outer panel itself is less likely to occur at a portion facing the occupant. Therefore, the beltline reinforcement is prevented from being bent starting from a broken line generated in the door outer panel at a portion facing the occupant.

  A vehicle side door structure according to a second aspect of the present invention is the vehicle side door structure according to the first aspect, wherein the bulging portion is formed in a hat-shaped cross section protruding outward in the vehicle width direction. An upper bent portion extending in the vehicle front-rear direction is disposed in the vicinity of the door outer panel.

In the present invention, the upper bent portion extending in the vehicle front-rear direction is disposed close to the door outer panel. Therefore, when the door outer panel is deformed by a collision load due to a side collision, the deformed door outer panel is the earliest. It contacts the upper bent part. Therefore, the shape of the door outer panel at the initial deformation is a shape along the shape of the upper bent portion. That is, the initial deformation of the door outer panel is restricted by the upper bent portion. As a result, the formation of an unexpected broken line having a different shape is suppressed. Therefore, the beltline reinforcement is further prevented from being bent starting from a broken line generated in the door outer panel at a portion facing the occupant.
A side door structure for a vehicle according to a third aspect of the present invention is the side door structure according to the first or second aspect, wherein the bulging portion is separated from the door outer panel.
The side door structure for a vehicle according to a fourth aspect of the present invention is the side door structure according to any one of the first to third aspects, wherein the bulging portion includes the first bulging portion, A second bulging portion disposed on the vehicle rear side of the first bulging portion and disposed opposite to an occupant seated on the vehicle seat, and the first bulging portion The distance between the distal end portion of the second bulging portion and the door outer panel is set shorter than the distance between the distal end portion and the door outer panel.
According to a fifth aspect of the present invention, there is provided the vehicle side door structure according to the fourth aspect, wherein the vehicle seat slides from the front movement limit position to the rear movement limit position along the vehicle longitudinal direction. When the vehicle seat is slid from the front movement limit position to the rear movement limit position, the vehicle seat overlaps with the region where the chest of an occupant seated on the vehicle seat is located. The second bulging portion is disposed at a position.
A vehicle side door structure according to a sixth aspect of the present invention is the side door structure according to the fourth or fifth aspect, wherein the vehicle width of the boundary between the first bulging portion and the second bulging portion is the vehicle width. The outer surface is inclined.

As described above, the side door structure for a vehicle according to claim 1 and claims 3 to 6 the invention described, when the collision load by side collision applied to the side door, the belt line reinforcement is passenger It has the outstanding effect that it can suppress that it bends in a side part.

  The vehicle side door structure according to the second aspect of the present invention can further prevent the beltline reinforcement from being bent at the side of the occupant when a collision load due to a side collision is applied to the side door. , Has an excellent effect.

1 is a perspective view showing a vehicle body to which a vehicle side door structure according to an embodiment is applied. In order to make the configuration inside the side door easier to understand, the belt line reinforcement provided inside the side door is indicated by a solid line, and the door inner panel is indicated by a broken line. It is a side view which shows the side door structure of a vehicle. In addition, in order to make the structure inside a side door intelligible, the beltline reinforcement provided inside the side door is described with the continuous line. FIG. 4 is a side view showing a region where a chest of an occupant seated on the seat is located when the vehicle seat is slid back and forth. (A) is an expanded sectional view along the 4A-4A line in FIG. 2, (B) is an expanded sectional view along the 4B-4B line in FIG. FIG. 4A is an enlarged cross-sectional view taken along line 4A-4A in FIG. 2 illustrating a state of the side door when a collision load due to a side collision is applied to the side door, and FIG. It is an expanded sectional view which followed the 4B-4B line in FIG. 2 which shows the state of this side door when it joins a side door. It is a schematic diagram which shows the positional relationship of the beltline reinforcement bent by the collision load by a side collision, and the passenger | crew who seated on the vehicle seat.

  A vehicle side door structure according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. The front side in the vehicle front-rear direction is indicated by an arrow FR, the outer side in the vehicle width direction is indicated by an arrow OUT, and the upper side in the vehicle vertical direction is indicated by an arrow UP.

  As shown in FIG. 1, a vehicle body 12 to which a vehicle side door structure 10 according to this embodiment is applied includes a roof 16 that forms a ceiling portion of a cabin 14. Further, the vehicle body 12 includes a roof side rail 18 that is disposed at an end of the roof 16 on the outer side in the vehicle width direction and extends in the vehicle front-rear direction. Further, the vehicle body 12 includes a front pillar 20, a center pillar 22, and a rear pillar (not shown) that support the roof 16 with an upper end connected to the roof side rail 18. The vehicle body 12 includes a rocker 26 that is connected to the lower ends of the front pillar 20, the center pillar 22, and the rear pillar and extends in the vehicle front-rear direction. The roof side rail 18, the front pillar 20, the center pillar 22, the rear pillar, and the rocker 26 function as a skeleton member of the vehicle body, and form an opening 28 and an opening 30 for getting on and off along the vehicle longitudinal direction. When the opening 28 and the opening 30 are closed by the front side door 32 and the rear side door 34, the cabin 14 and the outside of the vehicle are separated by the front side door 32 and the rear side door 34.

  Next, the front side door 32 as a side door to which the side door structure 10 of the present embodiment is applied will be described.

  The front side door 32 includes a door inner panel 36 disposed on the inner side in the vehicle width direction, and a door outer panel 38 disposed on the outer side in the vehicle width direction of the door inner panel 36. Further, the front side door 32 includes a long belt line reinforcement 40 provided between the door inner panel 36 and the door outer panel 38 and along the upper portion of the door outer panel 38.

  The door inner panel 36 is a press-molded part formed by pressing a steel plate material, and forms the lower part of the front side door 32 together with the door outer panel 38. A door trim (not shown) as an interior design material is attached to the inner side of the door inner panel 36 in the vehicle width direction.

  Similarly to the door inner panel 36, the door outer panel 38 is a press-molded part formed by pressing a steel plate material. Further, the door outer panel 38 is formed so as to protrude gently outward in the vehicle width direction, and the outer surface of the door outer panel 38 in the vehicle width direction forms part of the exterior design of the vehicle body. Further, the lower end portion and the front and rear end portions of the door outer panel 38 are joined to the door inner panel 36 by being bent inward in the vehicle width direction and subjected to hemming. Furthermore, between the door outer panel 38 and the door inner panel 36, a belt line reinforcement 40 described later, a front side glass (not shown), an impact beam, a speaker, wiring, and the like are provided.

  The belt line reinforcement 40 is a press-molded part formed by subjecting a steel plate material to press work, and plays a role of reinforcing the door belt line portion 41 of the front side door 32. Specifically, as shown in FIG. 2, the beltline reinforcement 40 includes a base portion 40 </ b> A that extends in the vehicle front-rear direction and the vertical direction. Further, the beltline reinforcement 40 protrudes outward in the vehicle width direction from the upper end portion of the base portion 40A, and as a bulging portion formed in a hat-shaped cross section in a cross-sectional view (see FIGS. 4A and 4B). A first bulging portion 40B and a second bulging portion 40C are provided. The first bulging portion 40B is disposed on the front side of the vehicle in the beltline reinforcement 40 and is formed in a long shape along the vehicle front-rear direction. Further, the second bulging portion 40C is disposed on the vehicle rear side in the beltline reinforcement 40 and is formed in a long shape along the vehicle front-rear direction. Further, the front end portion of the second bulge portion 40C is connected to the rear end portion of the first bulge portion 40B via the inclined portion 40D.

  Here, a region C surrounded by a broken line is a region where the chest of an occupant seated on the seat is located. Specifically, as shown in FIG. 3, when the seat 42 is slid from the front most position (front movement limit position) to the rear most position (rear movement limit position), the occupant 44 seated on the seat 42 This is an area where the chest 46 is located. More specifically, the occupant 44 shown in FIG. 3 is a dummy used for a collision test, and this dummy is an American standard male dummy (AM50). In addition, the dummy is seated on the seat in a seating posture determined by the side impact test method (ECE R95) adopted in Japan and Europe and the side impact test method (FMVSS214) adopted in the United States. .

  In addition, as shown in FIG. 2, the second bulging portion 40 </ b> C formed in the belt line reinforcement 40 is formed in a portion D facing the region C, and the first bulging portion 40 </ b> B is located in front of the portion D. It is formed in another part E. Further, as shown in FIGS. 4A and 4B, the first bulging portion 40B is formed with an upper bent portion 40J and a lower bent portion 40K extending in the vehicle front-rear direction. In addition, an upper bent portion 40L and a lower bent portion 40M extending in the vehicle front-rear direction are formed at the distal end portion of the second bulging portion 40C. Further, the upper bent portion 40J formed in the first bulging portion 40B is disposed closer to the door outer panel 38 than the lower bent portion 40K, and the upper bent portion 40L formed in the second bulging portion 40B. Is disposed closer to the door outer panel 38 than the lower bent portion 40M. In addition, the second bulging portion 40C formed in the portion D is set with a larger amount of protrusion outward in the vehicle width direction than the first bulging portion 40B formed in the other portion E. The space | interval between the door outer panels 38 is set narrow. More specifically, in the present embodiment, the protrusion amount L2 of the second bulge portion 40C is set larger than the protrusion amount L1 of the first bulge portion 40B, and the distal end portion of the first bulge portion 40B is set. The distance D2 between the distal end portion (upper bent portion 40L) of the second bulging portion 40C and the door outer panel 38 is set narrower than the distance D1 between the (upper bent portion 40J) and the door outer panel 38.

  As shown in FIG. 2, the beltline reinforcement 40 includes an upper joint 40E formed from the upper ends of the first bulging portion 40B and the second bulging portion 40C toward the vehicle upper side. Yes. The upper joint portion 40E is joined to the upper end portion of the door outer panel 38 by bending the upper end portion of the door outer panel 38 and applying hemming. Further, the belt line reinforcement 40 includes a lower joint portion 40G extending from the lower end portion of the base portion 40A to the vehicle lower side via a step portion 40F. The lower joint portion 40G is joined to the door outer panel 38 using an automobile adhesive such as a mastic sealer. Furthermore, a front joint 40H and a rear joint 40I are provided at the front end and the rear end of the beltline reinforcement 40, respectively. The front joint 40H and the rear joint 40I are provided at the front end of the door outer panel 38. It is joined to the part and the rear end part, respectively.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  When a collision load due to a side collision is applied to the side portion of the vehicle body 12 (see FIG. 1), first, the door outer panel 38 is deformed so as to be pulled to the vehicle lower side as shown in FIGS. . Next, the door outer panel 38 and the first bulging portion 40B formed on the belt line reinforcement 40 abut, and the door outer panel 38 and the second bulging portion 40C formed on the belt line reinforcement 40 abut.

  Here, as shown in FIGS. 2 and 3, in the present embodiment, the second bulging portion 40 </ b> C formed in the portion D facing the region C where the chest portion 46 of the occupant 44 seated on the seat 42 is located. The amount of protrusion outward in the vehicle width direction is set larger than that of the first bulging portion 40B formed in the other part E. Therefore, the rigidity of the beltline reinforcement 40 in the part D is higher than that of the other part E. That is, the part D in the beltline reinforcement 40 is less likely to be deformed than the other parts E. Further, as shown in FIGS. 4A and 4B, the distance between the distal end portion of the second bulging portion 40C and the door outer panel 38 is the distance between the distal end portion of the first bulging portion 40B and the door outer panel 38. The interval is narrower than In other words, the deformation of the door outer panel 38 required to contact the second bulging portion 40C is larger than the deformation amount of the door outer panel 38 required for the door outer panel 38 to deform and contact the first bulging portion 40B. The amount is set lower. Therefore, as shown in FIGS. 5 (A) and 5 (B), even if a collision load due to a side collision is applied to the front side door 32, the door outer panel 38 does not significantly deform and contacts the second bulging portion 40C. Touch. As a result, in the part D where the second bulging portion 40C is formed, a broken line formed by bending the door outer panel 38 itself is less likely to occur. Therefore, in the site | part D, it is suppressed that the beltline reinforcement 40 bend | folds from the broken line which arose in the door outer panel 38 as the starting point. Specifically, as shown in FIG. 6, the beltline reinforcement 40 starts to be deformed at the part E without being bent at the part D facing the occupant. That is, in the present embodiment, it is possible to prevent the beltline reinforcement 40 from being bent at the side of the occupant when a collision load due to a side collision is applied to the front side door 32.

  In the present embodiment, the upper bent portion 40J and the upper bent portion 40L extending in the vehicle front-rear direction are disposed close to the door outer panel 38. Therefore, when the door outer panel 38 is deformed by a collision load caused by a side collision, First, the door outer panel 38 contacts the upper bent portion 40J and the upper bent portion 40L. Therefore, the initial deformation of the door outer panel 38 is a shape that follows the shapes of the upper bent portion 40J and the upper bent portion 40L. That is, the initial deformation of the door outer panel 38 is regulated by the upper bent portion 40J and the upper bent portion 40L. As a result, the formation of an unexpected broken line having a different shape is suppressed. Therefore, it is possible to further suppress the beltline reinforcement 40 from being bent at the side of the occupant starting from the broken line generated in the door outer panel 38 at the portion D facing the occupant.

  Furthermore, in the present embodiment, since the second bulging portion 40C is provided in the portion D facing the region C where the chest of the occupant seated on the seat is located, the beltline reinforcement 40 faces the chest 46 of the occupant 44. Bending at the portion D to be bent is suppressed. As a result, the collision energy transmitted near the chest 46 of the occupant 44 can be reduced.

  In the present embodiment, an example in which the present invention is applied to the front side door 32 has been described. However, the present invention is not limited to this, and is provided on a side portion of a vehicle body such as a rear side door 34 or a slide door. The present invention can also be applied to other side doors.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be implemented without departing from the spirit of the present invention. Of course.

10 Vehicle side door structure
32 Front side door (side door)
36 Door inner panel
38 Door outer panel
40 beltline reinforcement
40A first bulging portion (bulging portion)
40B 2nd bulging part (bulging part)
40L Upper bent part (bent part)
41 Door belt line section
42 seats
44 Crew
46 Chest
C Region where the chest of the passenger seated on the seat is located
Part D (part facing the occupant seated in the vehicle seat)
E Other parts

Claims (6)

A door outer panel that is disposed outside the vehicle width direction and forms a part of the side door;
It is provided along the vehicle interior side of the door outer panel and along the upper portion of the door outer panel, reinforces the door belt line portion of the side door, and is located at a portion facing the occupant seated on the vehicle seat. A belt line reinforcement formed with a bulging portion in which a space between the door outer panel and the door outer panel is set narrower by setting a larger amount of protrusion outward in the vehicle width direction,
Equipped with a,
The beltline reinforcement includes a base portion extending in the vehicle front-rear direction and the vertical direction, the bulging portion projecting outward in the vehicle width direction from the upper end portion of the base portion, and a step portion from the lower end portion of the base portion. A lower joint portion that extends downward and is joined to the door outer panel.
A vehicle side door structure in which a ridge line extending in the vehicle front-rear direction is formed by forming the step portion at a portion between the base portion and the lower joint portion in the beltline reinforcement .   2. The side door structure according to claim 1, wherein an upper bent portion extending in the vehicle front-rear direction is disposed adjacent to the door outer panel by forming the bulged portion in a hat-shaped cross section that protrudes outward in the vehicle width direction.   The side door structure according to claim 1, wherein the bulging portion is separated from the door outer panel.   The bulging portion includes a first bulging portion, a second bulging portion that is disposed on the vehicle rear side of the first bulging portion and that faces the occupant seated on the vehicle seat. , And
  The distance of the front-end | tip part of a said 2nd bulge part and the said door outer panel was set narrower than the distance of the front-end | tip part of the said 1st bulge part, and the said door outer panel. The side door structure according to any one of the above.   The vehicle seat is slidable from the front movement limit position to the rear movement limit position along the vehicle longitudinal direction,
  When the vehicle seat is slid from the front side movement limit position to the rear side movement limit position, the second inflating position is overlapped in the vehicle width direction with a region where a chest of an occupant seated on the vehicle seat is located. The side door structure according to claim 4, wherein the protruding portion is arranged.   The side door structure according to claim 4 or 5, wherein a surface on the outer side in the vehicle width direction of a boundary portion between the first bulge portion and the second bulge portion is inclined.

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