JPH03121923A - Door construction for vehicle - Google Patents

Abstract

PURPOSE:To restrain the curved deformation of a door into a cabin and prevent the projection of a guard bar so fitted to the inner surface of a door outer panel as to form a closed sectional area therewith by providing a projection on the part of an inner panel in such a way as to oppose the guard bar. CONSTITUTION:When an obstacle B collides with the outside of a rear side door 3, a door outer panel 4 strengthened with a guard bar 6 moves to the inside of a cabin until the guide bar 6 comes in contact with the projection 9 of a door inner panel 5 without any curvature. In this state, or when the bar 6 is in contact with the projection 9 of the inner panel 5, an energy absorption zone 10 is formed between the bar 6 and the inner panel 5 due to the projection 9. Even if crew P collides, therefore, the absorption zone 10 absorbs collision energy, thereby ensuring the safety of the crew F. Also, without any need of thickening the outer panel 4 or fitting another reinforcement, the safety of the crew P can be sufficiently maintained, and the weight of a vehicle body can be lessened.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a door structure for a vehicle, and particularly to one that can ensure the safety of occupants in a vehicle interior even if the door structure is deformed by impact force.

Conventional technology Vehicle doors, such as rear side doors, are equipped with a
Some have reinforced structures with guard bars attached.

To explain this with reference to FIGS. 5 to 7, the rear side door 3 consisting of the door body 1 and the sash portion 2 is formed by wrapping a door outer panel 4 and a door inner panel 5 together.

A guard bar 6 having a hat-shaped cross section is joined to the inner surface of the door outer panel 4 in the approximate center of the door body I in the front-rear direction, and the door outer panel 4 and the guard bar 6 form a closed cross-section portion 7. It is formed.

Note that 8 indicates a door window glass.

This similar structure is shown in, for example, Japanese Unexamined Patent Publication No. 51-2116.

Problem to be Solved by the Invention Since the rigidity of the door outer panel 4 is increased by the guard bar 6, even if an external force is applied from the outside of the door outer panel 4 by an obstacle B in the event of a side collision, etc., the door outer panel 4 will not move significantly toward the inside of the vehicle. On the other hand, after the guard bar 6 moves toward the inside of the vehicle by the space 7a between the door inner panel 5 and the guard bar 6, there is a risk that the guard bar 6 will directly hit the occupant P. - It is necessary to protect the occupant P by using a large number of doors and door pads, resulting in an increase in weight and cost.

SUMMARY OF THE INVENTION Accordingly, the present invention provides a vehicle door structure in which a guard bar prevents the door from being bent toward the interior of the vehicle, and also prevents the guard bar from protruding toward the interior of the vehicle without using a separate reinforcing material or the like. It is something to do.

Means for Solving the Problem A guard bar that forms a closed section with the door outer panel is attached to the inner surface of the door outer panel, and a convex portion that projects toward the guard bar is attached to a part of the door inner panel that faces the guard bar. is provided.

Operation When an external force acts on the door outer panel, the door tends to curve and deform at the portion where the external force is applied, but the flatness of the door outer panel is maintained by the closed section formed on the inner surface of the door outer panel by the guard bar.

It is formed near the front side of the doper 6, and when the door outer panel 4 moves toward the passenger P side together with the guard bar 6 due to an obstacle B, the convex portion 9 prevents the movement of the guard bar 6, and prevents the guard bar 6 and the door from moving. An energy absorption zone 10 is secured between the inner panel 5 and the inner panel 5. still,
The concave portion 11 formed on the passenger compartment side of the second convex portion 9 may be filled with a pad material so that it also has an energy absorption function.

According to the above embodiment structure, the barrier B is the rear side door 3
When the vehicle collides with the outside of the door, the door outer panel 4 reinforced by the guard bar 6 moves toward the interior of the vehicle interior until the guard bar 6 abuts against the convex portion 9 of the door inner panel 5 without bending.

In this state, that is, when the guard bar 6 is in contact with the protrusion 9 of the door inner panel 5, an energy absorption zone 10 is created between the guard bar 6 and the door inner panel 5 by the protrusion 9.
is formed, so even if the occupant P collides with this area, the energy absorption zone 10 absorbs the collision energy and the occupant P
In addition, if the door outer panel tries to move toward the door inner panel, the protrusion formed on the door inner panel will come into contact with the guard bar.
Door inner panel and door? A sufficient energy absorption zone between the inner and outer channels is ensured.

Example Embodiments of the present invention will be described below with reference to the drawings.

1 to 4, the rear side door 3 consisting of a door body I and a sash 2 is formed by wrapping and tightening a door outer panel 4 and a door inner panel 5, and the inner surface of the door outer panel 4. The basic structure is that a guard bar 6 having a hat-shaped cross section is joined to the substantially central part of the door body 1 in the vertical direction toward the front and back, and a closed cross section 7 is formed by the door outer panel 4 and the guard bar 6. This is the same as the conventional method.

Here, a protrusion 9 that protrudes toward the guard bar 6 is formed at a - section of the inner surface of the door inner panel 5 that faces the guard bar 6 .

The convex part 9 is a circularly protruding part, and has a gar.

Additionally, occupant safety can be ensured without increasing the wall thickness of the door outer panel 4 or installing other reinforcements, so the vehicle body is more secure than in the past, which required such measures. Weight can be reduced.

Further, since the convex portion 9 is formed on the door inner panel 5, there is an advantage that the rigidity of the door inner panel 5 is increased accordingly.

Note that this invention is not limited to the embodiments described in -.
For example, the door may be applied to a front side door, and the protrusion may be formed by attaching a bracket.

As described in detail, according to the present invention, when an external force is applied to the door outer panel during a vehicle collision, the guard bar attached to the door outer panel prevents the door outer panel from moving toward the interior of the vehicle. Since the impact force is prevented by contacting the protrusion, no impact force is applied directly to the occupant, and the contact between the guard bar of the door outer panel and the protrusion causes the door outer panel and the door inner panel to contact each other. Since a space is formed in between, this space functions as an energy absorbing part and has the effect of increasing safety.

Therefore, it is possible to prevent the guard bar from moving toward the interior of the vehicle interior, which would otherwise occur if a protrusion is not formed on the door inner panel, without providing a separate reinforcement, thereby reducing the weight of the vehicle.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a front view of the door, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG.
The figure is a cross-sectional view at the time of collision, Figure 4 is a cross-sectional view taken along line IV-IV in Figure 1, Figure 5 is a front view of the conventional door, and Figure 6 is taken along line ■-■ in Figure 5. 7 is a sectional view taken at the time of collision. 4... Door outer panel, 5... Door inner panel, 6... Guard bar 17... Closed section. Figure 5

Claims (1)

[Claims] (1) A guard bar that forms a closed section with the door outer panel is attached to the inner surface of the door outer panel, and a convex part that projects toward the guard bar is provided on a part of the door inner panel that faces the guard bar. Characteristic vehicle door structure.