JPH10152070A - Roof structure of body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain the failing of a center pillar without bearing an increase in the weight, by comprising a function for inhibiting the failing of the center pillar by the deformation of a roof bow. SOLUTION: A roof 13 is connected with a side roof rail 12 with a roof bow 14 formed by a stepped plate for reinforcing the roof 13, and a connecting part reinforcement 15. The both ends of the roof bow 14 are bent at two bending parts 16, 17, to form the upward stepped structure. When the compressed load and the bending moment are added to one end of the roof bow 14 by the collision load added to the center pillar 11, the bending part 16 which is not reinforced, becomes larger than the reinforced bending part 17, so that the end of the roof bow 14 is lifted up, and to be faced in the direction for canceling the downward deformation of the end by the added bending moment, thereby the failing of the center pillar 11 can be restrained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a roof structure of a vehicle body.

[0002]

2. Description of the Related Art As a conventional roof structure of a vehicle body, for example, there is one shown in FIG.
No. 7).

[0003]

However, such a conventional roof structure has a structure in which the center pillar portion and the roof reinforcement portion (roof bow) are connected so as to have high rigidity. As shown in (1), it is difficult to sufficiently suppress the deformation of the center pillar 1 due to the buckling of the roof bow 2, and there is a problem that the center pillar 1 has to be strengthened. The present invention has been made in view of such a problem, and has as its object to solve the above problem by controlling the deformation of the roof bow to a mode in which the center pillar is prevented from breaking.

[0004]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 has a function of suppressing breakage of a center pillar by deforming a roof bow in a roof structure of a vehicle body. Characterize. Claim 2
According to the invention described in the above, in the structure according to the first aspect, both ends of the roof bow have a stepped structure with two bent upper portions, and only the upper one of the two bent portions is reinforced with a bead or the like. It is characterized. According to the third aspect of the present invention, in the structure of the first aspect, the roof bow is formed in a box-shaped cross section, and only the upper portion thereof is provided with a crushed bead.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are diagrams showing Embodiment 1 of the present invention. First, the structure will be described. The roof 13 is connected to the side roof rail 12 together with the roof bow 14 and the connecting portion reinforcement 15 which are constituted by stepped plates for reinforcing the roof 13. Here, both ends of the roof bow 14 are provided with two bent portions 16 and 1.
It is bent at 7, and has a stepped structure upward. The bent portions 16 and 17 are connected to the bent portion 17 closer to the connecting portion.
The structure is such that a bead 18 is provided only in the case and the bending strength is increased.

Next, the operation will be described. Due to the collision load applied to the center pillar 11, a compressive load and a bending moment are applied to the roof bow 14 at one end as shown in FIG. At this time, the bent portions 16 and 1 due to the compressive load
The deformation of the roof bow 1 is larger in the bent portion 16 that is not reinforced than in the bent portion 17 that is reinforced.
The end of 4 is lifted, in a direction to cancel the downward deformation of the end due to the applied bending moment. Further, even when the roof bow 14 buckles, the moment load generated thereby and transmitted to the roof side rail 12 and the center pillar 11 is absorbed by the bent portion 16 being easily bent.

FIGS. 4 and 5 show a second embodiment. In the second embodiment, instead of reinforcing the bent portion 27 of the roof bow 24 with a bead or the like, the connecting portion reinforcement 2
5 is extended to the bent portion 27. This has the same effect as the first embodiment.

FIG. 6 shows a third embodiment. The roof bow 34 having a box-shaped cross section has a structure in which a bead 37 for controlling bending deformation is provided only at an upper portion thereof, thereby having the same effect as that of the first embodiment.

[0009]

As described above, according to the present invention, since the structure of the roof bow can be controlled to a mode in which the center pillar is prevented from being broken, the center bow is hardly increased. The effect that the breakage of the pillar can be suppressed is obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a roof structure of a vehicle body according to a first embodiment.

FIG. 2 is a perspective view of a roof bow according to the first embodiment.

FIG. 3 is an operation explanatory view of the first embodiment.

FIG. 4 is a sectional view of a second embodiment.

FIG. 5 is a perspective view of a roof bow according to a second embodiment.

FIG. 6 is a perspective view of a roof bow according to a third embodiment.

FIG. 7 is an operation explanatory view of a conventional technique.

FIG. 8 is a sectional view of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Center pillar 12 Side roof rail 13 Roof 14 Roof bow 15 Connection part reinforcement 16 Bend part 17 Bend part 18 Bead 24 Roof bow 25 Connection part reinforcement 27 Bend part 34 Roof bow 37 Bead

Claims (3)

[Claims] 1. A roof structure of a vehicle body having a function of suppressing breakage of a center pillar by deforming a roof bow. 2. The roof bow has two bent upper steps at both ends thereof,
The roof structure of a vehicle body according to claim 1, wherein only the upper one of the two bends is reinforced with a bead or the like. 3. The roof bow has a box-shaped cross section, and a crushed bead is provided only at an upper portion thereof.
The roof structure of the vehicle body described.