JP5694793B2 - Vehicle door structure - Google Patents

Description

  The present invention relates to a vehicle door structure with improved occupant protection performance in a vehicle side collision.

  Conventionally, as a vehicle door structure with improved occupant protection performance at the time of a vehicle side collision, for example, there is one disclosed in Patent Document 1. In this conventional structure, by forming a rigid break point consisting of a branching convex part at the front part from the occupant of the beltline reinforcement, the door is deformed to the inside of the vehicle starting from the rigid break point ahead of the occupant at the time of a vehicle side collision. And is configured to protect the occupant.

Japanese Patent No. 2007-331484

  However, the structure of Patent Document 1 is a structure in which a rigid breakpoint is provided in the beltline reinforcement, and therefore there is a problem that it can be applied only to a door in which the beltline reinforcement is disposed. In addition, when a load more than expected is input to the door at the time of a side collision, there is a problem that the door inner panel may come into contact with an occupant and a failure may occur.

  The present invention has been made in view of the above-described conventional situation, and it is an object of the present invention to provide a vehicle door structure that can be applied to a door that does not include beltline reinforcement and that can improve passenger protection performance.

According to the first aspect of the present invention, a door formed in a hollow shape by an inner panel and an outer panel is disposed on a vehicle side portion, and a flange portion for disposing a glass seal member is provided at an upper edge of the inner panel. In the vehicle door structure formed so as to extend in the vehicle front-rear direction, and below the flange portion, a bulging portion that protrudes toward the vehicle interior side extends in the vehicle front-rear direction.
A fragile portion is formed in a portion of the flange portion that is forward of the seated occupant, and a convex portion is formed in a portion of the flange portion that is located on the side of the occupant's shoulder so as to protrude toward the inside of the vehicle. The bulging portion is formed in front of the occupant's shoulder , and a stepped portion is formed on the rear end of the bulging portion and on the lateral side of the occupant's shoulder. A portion that is formed so as to fall and is located on the side of the shoulder of the occupant of the inner panel is substantially planar due to the convex portion of the flange portion and the step portion of the bulging portion. It is said.

  According to the present invention, the fragile portion is formed in the front portion of the flange portion of the occupant, and the portion of the inner panel positioned on the side of the upper portion of the occupant is formed with the convex portion formed on the flange portion and the bulging portion. It was made into a substantially planar shape by the step part formed in. Accordingly, in the inner panel according to the present invention, the rigidity of the planar portion is lower than that of the other portions due to a sudden change in shape, and becomes a so-called rigidity break point.

  Therefore, at the time of a side collision, the inner part of the inner panel is easily bent and deformed as a rigid break point, and the fragile part is easily displaced inward of the vehicle. Therefore, the door bends inward at the front part of the occupant, so that the displacement part of the door can be prevented from coming into contact with the occupant, and the occupant can be protected.

  Also, since the portion of the inner panel located on the side of the upper part of the occupant is made flat and this is used as a rigid break point, the position where the inner panel abuts on the upper part of the occupant due to a side collision load more than expected. Even when the inner panel is displaced, the planar portion of the inner panel comes into contact with the occupant, so that the obstacle value of the occupant can be suppressed.

  Furthermore, in the present invention, the deformation of the door at the time of a side collision is controlled only by devising the shape of the inner panel. Therefore, the present invention can be applied to a door that is not provided with a beltline reinforcement. Compared with the conventional structure in which the portion is provided, an increase in weight and cost can be avoided.

It is a perspective view which shows the door structure by Example 1 of this invention. It is a cross-sectional side view (II-II sectional view taken on the line of FIG. 1) of the door structure. It is a plane schematic diagram which shows the deformation | transformation state of the said inner panel at the time of a side collision.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 3 are views for explaining a door structure of a vehicle according to a first embodiment of the present invention.

  In the figure, reference numeral 1 denotes a side door disposed so as to be able to open and close an opening 4a of a side panel 4 of the vehicle. The side door 1 has a press-formed inner panel 3 and an outer panel 2 arranged so as to form a hollow shape, and a door body 1a formed by joining the peripheral portions of the panels 3 and 2 by hemming, And a sash portion 1b integrally formed on the upper edge portion of the door body 1a. A door glass 8 and a door glass raising / lowering mechanism (not shown) are disposed in the door body 1a. 2b in FIG. 2 is a reinforcement for securing the rigidity of the outer panel 2 by being attached to the inner surface of the outer panel 2 by spot welding or an adhesive.

  Flange portions 2 a and 3 a for mounting a seal member (not shown) of the door glass 8 are formed on the upper edge of the outer panel 2 and the inner panel 3. In addition, the inner panel 3 is formed with a bulging portion 5 projecting inward of the vehicle so as to extend in the front-rear direction along the lower edge of the flange portion 3a.

  And the weak part 3b, 3c is notched and formed in the front part of the said flange part 3a. The fragile portions 3b and 3c are also used for positioning when a door trim is mounted on the inner surface of the side door 1.

  A convex portion 3d is bent and formed on the flange portion 3a at the upper portion of the seated occupant P, specifically on the side of the shoulder so that the convex portion 3d protrudes toward the inside of the vehicle. In addition, a step portion 5a is formed at a portion of the bulging portion 5 located on the side of the shoulder of the occupant P so as to drop to the outside of the vehicle. Reference numeral 3e denotes a work opening formed in the inner panel 3.

  In this way, a substantially flat planar portion 7 is formed on the inner panel 3 on the side of the shoulder of the occupant P by the convex portion 3d of the flange portion 3a and the step portion 5a of the bulging portion 5. Is formed. Specifically, as shown in FIG. 2, the convex portion 3 d of the flange 3 a is located slightly outside the stepped portion 5 a of the bulging portion 5.

  When a load F acts on the door 1 from the outside at the time of a side collision, stress concentrates on the fragile portions 3b and 3c of the flange 3a, and the plane portion 7 becomes a rigid break point. As indicated by the dotted line, the inner panel 3 is displaced toward the vehicle interior so that the vicinity of the weakened portions 3b, 3c is bent. In this case, the flat surface portion 7 serving as the rigidity break point is located on the side of the occupant P, and the fragile portions 3b and 3c are located in front of the occupant P. It will be located in front of P. In the unlikely event that the load F is greater than expected and the displacement is large enough to abut against the occupant P, the planar portion 7 will abut against the occupant P.

  In this embodiment, the fragile portions 3b and 3c are formed in front of the occupant P of the flange portion 3a, and the flat surface portion 7 including the convex portion 3d and the stepped portion 5a is positioned on the side of the shoulder of the occupant P. Since it is formed, when a load F acts on the door 1 from the outside at the time of a side collision, stress concentrates on the fragile portions 3b, 3c ahead of the occupant P, and the flat surface portion 7 located on the side of the occupant P Since it becomes a rigid break point, the inner panel 3 will be bent and displaced from the vicinity of the fragile portions 3b, 3c located in front of the occupant P so that the vertex a of the displacement abuts the occupant P. The protection performance of the passenger P can be ensured.

  In addition, since the flat portion 7 including the convex portion 3d and the stepped portion 5a is formed in a portion of the inner panel 3 located on the side of the shoulder of the seated occupant P, the load F is assumed at the time of a side collision. As described above, even when the displacement of the inner panel 3 is large enough to contact the occupant P, the flat portion 7 of the inner panel 3 contacts the occupant P. Can be suppressed.

  In addition, since it is possible to control the deformation of the inner panel 3 toward the inside of the vehicle only by devising the shape of the inner panel 3, the invention can also be applied to a door in which no beltline reinforcement is provided on the inner panel 3. Compared to conventional structures that require beltline reinforcement, an increase in weight and cost can be avoided.

  The present invention is particularly useful for doors in which beltline reinforcement is not provided, but it is of course applicable to doors in which beltline reinforcement is provided on the inner panel 3.

  In this embodiment, the case where the fragile portions 3b and 3c are formed at two locations has been described. However, the fragile portion may be formed at only one location.

DESCRIPTION OF SYMBOLS 1 Side door 2 Outer panel 3 Inner panel 3a Flange part 3b, 3c Fragile part 3d Convex part 5 Expansion part 5a Step part 7 Plane part P Crew

Claims (1)

A door formed in a hollow shape by the inner panel and the outer panel is disposed on the side of the vehicle, and a flange portion for disposing a glass seal member extends in the vehicle front-rear direction at the upper edge of the inner panel. In the vehicle door structure formed so that the bulging portion that extends to the vehicle interior side extends in the vehicle front-rear direction below the flange portion,
A fragile portion is formed in the front portion of the flange portion from the seated occupant,
A portion of the flange portion located on the side of the occupant's shoulder is formed so that a convex portion protrudes toward the inside of the vehicle,
The bulging portion is formed in front of the occupant's shoulder, and a stepped portion is stepped down to the outside of the vehicle at a portion of the bulging portion at a rear end and on the side of the occupant's shoulder. Formed as
A portion of the inner panel located on a side of the shoulder of the occupant has a substantially planar shape due to a convex portion of the flange portion and a step portion of the bulging portion.

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