JPH0423743Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rear body structure of an automobile, and particularly to a reinforcement structure for a rear end corner portion of a roof panel where a roof panel and a rear pillar are connected.

(Prior Art) In automobiles such as hatchback types, a hinge for opening and closing the back door is attached to the rear end of the roof panel. For this reason, the rear end of the roof panel requires a certain level of strength, and a rear header is provided to ensure this strength. This rear header is formed into a closed cross-sectional shape by a top panel and a lower panel, and extends in the vehicle width direction along the rear end of the roof. A hinge reinforcement is provided for reinforcing the hinge attachment portion of the back door formed in the back door.
In order to fully demonstrate the reinforcing function of this hinge reinforcement, conventionally, as disclosed in Japanese Patent Application Laid-open No. 58-81867, the hinge reinforcement is connected to the lower panel within the closed cross section of the rear header. By bending the hinge reinforcement upward and forming an extended vertical wall portion connected to the upper panel, a rear header joint is provided at the side end of the hinge reinforcement to improve rigidity. ing.

(Problem to be solved by the invention) Although it is possible to improve the steel properties of the rear header itself by adding knots using hinge reinforcement, this rear header does not connect to the rear pillar at its side ends. Since the rear header is supported, unless the strength of the connecting portion between the rear header and the rear pillar is sufficient, the rear header will not be able to adequately support the backdoor.

The present invention has been developed in view of the above circumstances, and it is an object of the present invention to provide a rear body structure for an automobile that can improve not only the rigidity of the rear header itself but also the support strength for the rear header.

(Means for Solving the Problems) The rear body structure of an automobile according to the present invention utilizes the side ends of the hinge reinforcement to form a vertical wall within the closed section of the rear header, and also forms a vertical wall within the closed cross section of the rear pillar. By forming another vertical wall within the closed section using the upper end, two joints are provided in the rear header, thereby achieving the above object. That is,
a rear header formed in a closed cross-sectional shape by an upper panel and a lower panel and extending in the vehicle width direction along the rear end of the roof panel; and a rear header disposed between the upper panel and the lower panel and coupled to the lower panel; The hinge reinforcement includes a hinge reinforcement for reinforcing the hinge attachment portion of the back door formed at the rear end of the roof panel, and a rear pillar formed in a closed cross-section by an inner panel and an outer panel, and the hinge reinforcement A vertical wall portion formed by bending the hinge reinforcement upward and joining it to the upper panel is formed in an extended manner at a side end portion, and the rear pillar has an upper end portion of the outer panel extending from the hinge reinforcement. The outer panel is connected to the upper panel through the upper panel, and the upper end of the outer panel is formed with an extended vertical wall portion formed by bending the outer panel downward and connecting it to the lower panel. .

The above two "vertical wall parts" may be formed so as to close the entire closed section of the rear header, or may be formed so as to partially close the rear header, in other words, they are connected to both the upper panel and the lower panel. Any material may be used as long as it can improve the strength near the vertical wall portion.

(Function) With the above configuration, a double joint is provided at the end of the rear header, so the rigidity of the rear header is extremely high.In addition, the inner panel of the rear pillar is generally formed integrally with the lower panel of the rear header. , or is formed in combination with this, the double knot is extremely effective in improving the connection strength between the rear header and the rear pillar. Furthermore, the presence of the double knot makes it possible to disperse the stress caused by the load input from the hinge attachment portion of the back door when the back door is opened and closed.

(Effect of the invention) Therefore, according to the invention, the rigidity of the rear header and the support strength for the rear header can be improved with a simple configuration.

(Examples) Examples of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an embodiment of the rear body structure of an automobile according to the present invention, and is a view showing section I in FIG. 2 obliquely from the rear.

In FIG. 1, near the bottom of the rear end of the roof panel 1, a rear header 4 formed in a closed cross section by an upper panel 2 and a lower panel 3 extends in the vehicle width direction along the rear end of the roof panel 1. has been done. A hinge reinforcement 5 is disposed between the top panel 2 and the lower panel 3 of the rear header 4, and a lower panel reinforcement 6 for reinforcing the lower panel 3 is disposed between the hinge reinforcement 5 and the lower panel 3. is installed.

The hinge reinforcement 5 is connected to the lower panel 3 via the lower panel reinforcement 6, that is, by welding or the like, and its rear end is attached to a back door (see FIG. (not shown) hinge mounting part 1
a, thereby reinforcing the hinge mounting portion 1a.

On the other hand, the rear pillar 7 has an upper panel 8 and an inner panel 9 formed in a closed cross-sectional shape with the outer panel 8 facing upward. The inner panel 9 is integrally formed with the lower panel 3 of the rear header 4. A roof side rail 10 that extends forward along the side edge of the roof panel 1 is coupled to the outer panel 8.

The rear header 4 and the rear pillar 7 are connected as shown by the broken surface in the figure. That is,
At the side end portion of the hinge reinforcement 5, an extended vertical wall portion 5a is formed by bending the hinge reinforcement 5 upward and joining it to the upper panel 2. Since the side ends of the rear header 4 are closed by the vertical wall portion 5a, the structure has extremely high rigidity. The tip of the hinge reinforcement 5 further to the side than the vertical wall portion 5a is stacked with the roof panel 1, the hinge reinforcement 5, the roof side rail 10, and the outer panel 8 in this order from above. The connection with the member is made. As a result, the outer panel 8 of the rear pillar 7 is coupled to the upper panel 2 of the rear header 4 via the roof side rail 10 and the hinge reinforcement 5 at its upper end. moreover,
At the upper end of the Atsupa panel 8, the outer panel 8
A vertical wall portion 8a is formed by bending the vertical wall portion 8a downward and joining it to the lower panel 3. This vertical wall portion 8a closes the upper end of the rear pillar 7, resulting in a structure with extremely high rigidity.

FIG. 3 is a cross-sectional view of the fractured surface.

As is clear from FIG. 3, according to this embodiment, two vertical wall portions 5a and 8a are formed at the connecting portion between the rear header 4 and the rear pillar 7, so that these become double nodes. Therefore, the connection strength between the rear header 4 and the rear pillar 7 can be made extremely high. Further, since the load input from the hinge mounting portion 1a due to opening and closing of the back door is widely dispersed through the vertical wall portions 5a and 8a, stress concentration can be avoided. Therefore, it is possible to improve the support strength for the rear header that supports the back door.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of the rear body structure of an automobile according to the present invention, Fig. 2 is a plan view of the car showing the part where the structure is adopted, and Fig. 3 shows the fractured section of Fig. 1. It is a sectional view showing details. 1...Roof panel, 2...Atsupa panel, 3
...Lower panel, 4...Rear header, 5...Hinge reinforcement, 7...Rear pillar, 8
...Outer panel, 9...Inner panel, 5a,
8a... Vertical wall portion.

Claims (1)

[Claims for Utility Model Registration] A rear header formed in a closed cross-sectional shape by a top panel and a lower panel and extending in the vehicle width direction along the rear end of the roof panel, and disposed between the top panel and the lower panel. and a hinge reinforcement which is coupled to the lower panel and reinforces a hinge attachment portion of a back door formed at the rear end of the roof panel, and a rear pillar formed in a closed cross-section by an inner panel and an outer panel. A vertical wall portion formed by bending the hinge reinforcement upward and joining it to the upper panel is formed at a side end of the hinge reinforcement, and the rear pillar is formed at a side end portion of the outer panel. An upper end portion is connected to the upper panel via the hinge reinforcement, and a vertical wall portion formed by bending the outer panel downward and connecting it to the lower panel is formed at the upper end portion of the outer panel. A rear body structure of an automobile characterized by: