JPS58183359A - Car body construction of automobile - Google Patents

Abstract

PURPOSE:To divide an external input, by providing a reinforcement for concentrically reinforcing a Y-shaped joint where a roof side rail, a rear roof rail and a rear pillar meet. CONSTITUTION:The reinforcement 7 that extends to a roof side rail extension 71, a rear pillar extension 72 and a rear roof rail extension 73 is attached to the surface of the joint 1 on the interior side of the car body, and is spot-welded at an exterior side 74 where the roof side rail and a rear inner panel 2 meet, a roof side 76 where the roof side rail and the rear roof rail meet, and a rear side 75 where the rear roof rail and the rear pillar meet, respectively. In a car body construction having the constitution as mentioned above, when a load is exerted on the joint 1 from any one of the three extending directions, it is received by the reinforcement 7 thereby the load is dispersed in the three directions.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle body structure in the vicinity of a junction where a roof site rail, a rear roof rail, and a pillar meet in a triangular shape.

An example of a conventional vehicle body structure is shown in FIGS. 1 and 2.

Although Fig. 1 shows the rear fender panel and roof panel, which are outer panel members, removed, the explanation will also be made with reference to Fig. 2. The rear roof rail connecting portion Qυ formed by the upper part of the biller inner panel (2) is spot welded to the rear roof rail lower panel (3), and the roof sight rail connecting portion extends forward to spot m to the roof site rail. It has a connecting table. The rear roof rail (4) is this rear roof rail lower panel (3)
The rear roof rail upper panel 4υ is formed into a closed cross section with the rear roof rail upper panel and covered by the roof panel (5), and the rear roof rail upper panel 4υ is formed with the rear fender panel (6).
is combined with The reason why the rear roof rail (4) forms a closed section frame with the rear roof rail upper panel Cυ and the rear roof rail lower panel (3) is because
This is done in consideration of the strength of the rear roof rail (4) and the vehicle body in its vicinity.In particular, when a hatch back door etc. is pivotally mounted, the hatch back door part becomes an opening, so this is to ensure strength and rigidity. It is common to have a closed cross section like this.

As I know myself, with a conventional car body structure like this,
The rear roof rail upper panel (4υ) was installed in order to strengthen the merging section +11, which is a key part for strength that receives torsional input from the vehicle body that tends to occur when driving on rough roads, so the roof rail The middle part of (4) has excessive strength and rigidity, which is wasteful and hinders weight reduction.At the same time, manufacturing and assembly costs are high due to the large number of parts and the complexity of their connection relationships. In addition, as a means of strengthening the merging portion +11, it is possible to strengthen the merging portion (1) by increasing the thickness of the rear pillar inner panel (2) and rear roof rail lower panel (3). However, there was still a problem in that the weight increased to unnecessary parts.

The present invention has been made by focusing on these conventional problems, and solves the above problems by providing a reinforcing member that intensively strengthens the confluence part and extending it across three directions, thereby dividing the external input. The purpose is to provide a vehicle body structure that solves the problem.

The purpose of the present invention to achieve such an object is to provide a vehicle body structure near a junction where a roof site rail, a rear roof rail, and a pillar meet in a triangular shape, in which the rear roof rail does not form a closed cross section. The rear roof rail is formed only from the conventional rear roof rail lower pawl, and a reinforcing member extending in three directions of the roof site rail, the rear roof rail, and the pillar is attached to the inside of the vehicle at the merging part. It consists in the single structure of a car.

The present invention will be explained below based on illustrated embodiments.

Note that the same parts as in the conventional example are given the same reference numerals.

3 to 5 show one embodiment of the present invention, and as shown in FIG. 3 with the rear fender pawl and roof panel removed, the merging part (11 Formed by the upper part of the pillar inner panel (2), the rear roof rail connection part Qυ is spot welded to the rear roof rail (4a), and the roof sight rail connection part @ extends forward and spot welded to the roof sight rail. As shown in Figure 4,
The flange (41a) of the rear roof rail (4a) is spot welded to the joint surface 6υ of the rear end of the roof panel (5).

Then, reinforcing members (forces) are attached to the interior side surface of the merging section (1) that extend in three directions: the roof site rail extension συ, the rear pillar extension σ, and the rear roof rail extension σ4. It is spot welded to the juncture with the panel (2) on the outside of the vehicle σ, the juncture between the roof site rail and the rear roof rail on the roof side σe, and the juncture between the rear roof rail and the cabin rear side σ9, respectively.

Of course, the positions of these spot welding points can be changed depending on design considerations.

As shown in Figures 4 and 5, the rear roof rail (
The hinge bracket υ of the hatchback door (8) is fixed near the center of 4), and the hinge bracket 0υ is fixed and reinforced at that part, and the hinge mounting part (9) protrudes from the top.
is formed, to which the hinge member υ is fixed by bolt 0 and nut a, @3.

In this example, the reinforcing member (
7) is extended to the vicinity of the hinge attachment part (9), but if it is extended to cover the bottom of the hinge attachment part (9) as shown at one point td[, the reinforcing effect will be further improved.

In the vehicle body structure having the above configuration, the merging section (1)
When a load is applied from each direction, the reinforcing member (7) receives the charge and disperses it in three directions, so that it can withstand the load sufficiently.

When the reinforcing member (7) is extended to below the hinge attachment part (9), the load from the hinge Sυ is transferred to the reinforcing member (7).
), so it can withstand even if an unreasonable external force is applied to the back door.

According to the vehicle body structure of the present invention, the strength of the merging section is significantly improved, and the conventional roof rail upper failure is not required, reducing the number of parts and simplifying the connection relationship, reducing manufacturing costs and assembly. Costs are reduced. In addition, as a result of intensive reinforcement with reinforcing materials, there is no need to increase the thickness of other parts, and combined with the elimination of the rear roof rail upper panel, the weight is reduced even after subtracting the increase in 4#gLts material. In addition, if the reinforcing member is extended below the hinge mounting part,
The hinge attachment part is reliably strengthened and the lower part is covered smoothly, improving safety.

[Brief explanation of the drawing]

Figures 5g1 and 1g2 show a conventional example, where Figure 1 is a perspective view of the main part, Figure 2 is a sectional view taken along line n-n in Figure 1, and Figures 3 to 4.
The figures show one embodiment of the present invention, and Fig. 3 is a perspective view of the main part, Fig. 4 is a cross-sectional view of Fig.
FIG.

Claims (1)

[Claims] In a vehicle body structure near a junction where a roof sight rail, a rear roof rail, and a pillar join together in a triangular shape, the roof sight rail, the rear roof rail, and the pillar extend in three directions on the inside surface of the passenger compartment of the junction, and are arranged in each direction. An automobile body structure characterized in that a reinforcing member is attached to the member.