JPH05104951A - Door belt line part reinforcing structure - Google Patents

Abstract

PURPOSE:To provide door belt line part reinforcing structure improving the rigidity and strength of the door belt line part of a side door by reinforcing an outer reinforcement. CONSTITUTION:The opened face of an outer reinforcement 20 for reinforcing an outer panel 12 is closed by a reinforcement 22 to form closed cross section. The tension that is going to stretch out the bent part 20C of the reinforcement 20 is thereby absorbed by the reinforcement 22 functioning as a tension resisting member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door belt line portion reinforcing structure for reinforcing a door belt line portion of a side door.

[0002]

2. Description of the Related Art In order to improve the rigidity of a door belt line portion, an outer reinforcement which reinforces an outer panel 12 is provided on a belt line of a side door 10 (a hatched portion shown in FIG. 3) as shown in FIG. 20 are arranged.

The upper flange portion 20A of the outer reinforcement 20 is fixed to the standing wall 18 of the outer panel 12 by an adhesive or spot welding. on the other hand,
Lower flange portion 20B of outer reinforcement 20
Is the outer panel 1 with the mastic sealer 26, etc.
No. 2 is fixed to the inside of No. 2 or is not fixed (refer to Japanese Utility Model Laid-Open No. 1-103417).

By the way, an automobile or the like is simply a side door 10
The outer reinforcement 20 is not stretched only by the collision with the vehicle. However, when a secondary collision occurs in which the occupant collides with the inner panel 14 after the primary collision, the side door 10 is connected to the occupant and the vehicle. It is sandwiched between and causes deformation. Therefore, in the outer reinforcement 20, the bent portion 20C is stretched and stretched. Since the inner reinforcement 28 is fixed by spot welding or the like, it is difficult to stretch it. As a result, the closed cross section formed by the outer panel 12 and the outer reinforcement 20 was crushed, and the impact energy absorption amount at the door belt line portion when the occupant bumped into the side door 10 was not sufficient.

[0005]

SUMMARY OF THE INVENTION In consideration of the facts described above, the present invention provides a reinforcing structure for a door belt line portion which enhances the rigidity and strength of the door belt line portion of a side door by reinforcing the outer reinforcement. The purpose is to provide.

[0006]

A reinforcing structure for a door belt line portion according to the present invention is an outer reinforcement having one end fixed to an upper end portion of an outer panel of a side door and having a substantially L-shaped cross section for reinforcing the outer panel. A reinforcement that closes the open surface of the outer lean hose that is open in the vehicle width direction to form a closed cross section integrally with the outer lean hose, and the outer reinforcement and the reinforcement. And a partition wall that closes an open surface of the closed cross-section that is open in the vehicle front-rear direction.

[0007]

In the reinforcing structure of the door belt line portion having the above-described structure, when a secondary collision occurs in which the occupant collides with the side door after the primary collision in which the automobile or the like collides with the side door, the side door is It is pinched between cars and causes deformation. As a result, the bent portion of the outer reinforcement is stretched and stretched.

However, since the open surface of the outer reinforcement which is opened in the vehicle width direction is closed by the reinforcement, the tensile force for stretching the bent portion functions as a tensile resistance member. Absorbed by the hosement. Further, since the partition wall closes the open surface that is open in the vehicle front-rear direction of the closed cross section composed of the outer reinforcement and the reinforcement, and constitutes a box-type support, the reinforcement is facilitated. Do not deform.

As a result, the amount of absorption of collision energy at the time of a secondary collision of the outer reinforcement reinforced by the outer reinforcement, the reinforcement and the partition wall increases.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 3, the reinforcing structure of the door belt line portion according to the present embodiment has a position corresponding to the upper end portion of the side door 10 (hatched portion), particularly a position corresponding to a seated occupant (arrow B).
Part)).

As shown in FIG. 1, the side door 10
Is composed of an outer panel 12 and an inner panel 14. At the upper end of the outer panel 12, a standing wall 18 having a fixing portion 16 bent in a U-shape is formed, and the fixing portion 16 has a substantially L-shaped outer reinforcement 20.
The upper flange portion 20A and the upper flange portion 22A of the reinforcement 22 are fixed to each other. This reinforcement 22 has a flat plate shape (see FIG. 2), and as shown in FIG. 1, the lower flange portion 22B has an outer reinforcement 2
0 is attached to the lower flange portion 20B, and the open surface of the outer reinforcement 20 is partially closed to form a substantially triangular closed cross section in a side view.

As shown in FIG. 2, triangular partition walls 24 are bent and formed at right angles from both end portions of the reinforcement 22 in the vehicle front-rear direction.
The reinforcement 22 and the outer reinforcement 20 form a triangular prismatic box. This increases the support rigidity of the outer reinforcement 20 and increases the amount of energy absorbed during a collision. Further, as shown in FIG. 1, the lower flange portion 22B of the reinforcement 22 is bonded to the outer panel 12 with a mastic sealer 26.

As shown in FIG. 2, the partition walls 24 are arranged at regular intervals in the front-rear direction of the vehicle so as not to come into contact with an occupant when the side door 10 is deformed.

Next, a modified mode when an automobile or the like collides with the side door 10 will be described with reference to FIG.

After a primary collision occurs in which an automobile or the like collides with the arrow A portion of the outer panel 12, a secondary collision occurs in which an occupant collides with the inner panel 14 due to inertial force.
As a result, the side door 10 is sandwiched between the occupant and the automobile or the like to be deformed. At this time, a tensile force for stretching the bent portion 20C of the outer reinforcement 20 is generated.

However, since the open surface of the outer reinforcement 20 which is open in the vehicle width direction is closed by the reinforcement 22, the pulling force for stretching the bent portion 20C acts as a pull resistance member. It is absorbed by the functioning reinforcement 22. Further, at this time, the partition wall 24 (see FIG. 2) is the reinforcement 22.
Since it supports both ends of the
Has a large support rigidity.

As a result, the outer reinforcement 20
Also, the amount of collision energy absorbed during the secondary collision of the outer panel 12 reinforced by the reinforcement 22 and the partition wall 24 increases.

[0018]

In the reinforcing structure of the door belt line portion of the present invention, the outer reinforcement for reinforcing the outer panel is reinforced by the reinforcement and the partition wall to form the box structure, so that the door belt line portion of the side door is The amount of impact energy absorbed can be increased.

[Brief description of drawings]

FIG. 1 is a sectional view showing a reinforcing structure of a door belt line portion according to the present invention.

FIG. 2 is a perspective view showing a reinforcing structure of a door belt line portion according to the present invention.

FIG. 3 is a schematic side view showing a reinforcing position of a door belt line portion according to the present invention.

FIG. 4 is a cross-sectional view showing a conventional reinforcing structure of a door belt line portion.

[Explanation of symbols]

 20 Outer reinforcement 22 Reinforcement 24 Bulkhead

Claims (1)

[Claims] 1. An outer reinforcement having one end fixed to an upper end of an outer panel of a side door and having a substantially L-shaped cross section for reinforcing the outer panel, and an open surface of the outer lean hose opened in a vehicle width direction. A reinforcement that is closed to form a closed cross section integrally with the outer lean hosement, and an open surface that is open in the vehicle front-rear direction of the closed cross section that is composed of the outer reinforcement and the reinforcement. A reinforcing structure for a door belt line portion, comprising: a partition wall that closes.