JPH0452146Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is based on the floor structure of an automobile, specifically, a cross member is provided on the lower front surface of the rear floor panel, and a cross member is provided at the front end of the rear floor panel, which is one step higher than the rear floor. This invention relates to an automobile floor structure in which heave panels forming a floor are joined together.

(Prior Art) Generally, in a one-box type automobile, the floor on which the driver's seat is placed is one step higher than the rear floor, and the power unit is disposed below this floor.

However, the floor structure of this type of car is
As schematically shown in the figure, conventionally, a plurality of cross members B are arranged at predetermined intervals on the lower surface of the rear floor panel A constituting the rear floor, and the cross members B are connected to the rear floor panel A.
At the same time, a header panel C is placed in front of the rear floor panel A and stands up from the panel A to define a space for installing the power unit, and the rear end of the header panel C is
It is connected to an extension end of the rear floor panel A that extends further forward than the cross member B by spot welding.

(Problems to be solved by the invention) By the way, in the above-mentioned floor structure shown in FIG. 3, the rear floor panel A and the header panel C are simply joined by spot welding. In order to ensure sufficient strength, it is necessary to increase the number of spot welding points, which leads to the problem that the number of work steps increases accordingly.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to reduce the number of spot welding points while still providing sufficient bonding strength between the rear floor panel and the header panel. It is intended to provide a floor structure.

(Means for Solving the Problems) The present invention provides an automobile floor structure in which a header panel 3 forming a floor one step higher than the rear floor is connected to the front end of a rear floor panel 4. The front end portion of the rear floor panel 4 is vertically overlapped with the front end portion of the rear floor panel 4 over a predetermined width in the front-rear direction, and a cross-section inverted hat is provided with a pair of front and rear welding flanges 51 on the lower surface of the overlapping portion of both panels 3 and 4. The present invention is characterized in that a shaped cross member 5a is provided and each of the welding flanges 51 is spot-welded to the overlapping portion.

(Function) According to the present invention, the rear end portion of the header panel 3 and the front end portion of the rear floor panel 4 are spot welded to each of the front and rear flanges 51 of the cross member 5a. , 4 can be sufficiently welded to the cross member 5a.
Since the opening between the flanges 51 at a is closed by the panels 3 and 4, sufficient rigidity of the cross member 5a can be obtained, and the overall strength of the joint portion of the panels 3 and 4 is increased. is sufficiently increased.

(Example) An example of the floor structure according to the present invention will be described below based on the drawings.

Fig. 1 shows the floor of a one-box type automobile, in which 1a and 1b are side members arranged on both sides of the floor, and 2 is a front floor installed at the front between the side members 1a and 1b. The rear part of the front floor panel 2 is raised up from the side member to integrally form a standing wall part 21.

Further, 3 is a header panel installed behind the front floor panel 2 between the side members 1a and 1b, and 4 is a header panel installed between the side members 1a and 1b.
This is a rear floor panel installed on the rear part of the header panel 3 between the sections 5a and 3b, and on the lower surface of the rear floor panel 4, three cross members 5a, each having an inverted hat shape in cross section, are provided with a pair of flanges 51, 51.
5b and 5c are arranged at a predetermined interval.

Further, the header panel 3 is provided with a rising wall part 31 facing the rising wall part 21 of the front floor panel 2 at a predetermined distance in its front part, and is defined by these rising walls 21 and 31. The space S serves as a housing space for a power unit (not shown).

In the floor structure having the above configuration, in the embodiment shown in the figure, the rear end of the header panel 3 is extended to the rear end of the cross member 5a disposed on the lower surface of the front end of the rear floor panel 4. The extended end portion 32 and the front end portion of the rear floor panel 4 are overlapped over a predetermined width in the front-rear direction on the cross member 5a with the rear floor panel 4 facing upward, and the overlapping portion and the front end portion of the cross member 5a are overlapped. The flanges 51, 51 are integrally joined by spot welding.

In the figure, 6a indicates a front wheel house, and 6b indicates a rear wheel house.

(Effect of the invention) As described above, the present invention overlaps the front end of the rear floor panel 4 vertically with the rear end of the header panel 3 over a predetermined width in the front-rear direction, and also overlaps the overlapping portion of both panels 3 and 4. A cross member 5a having an inverted hat-shaped cross section and having a pair of front and rear welding flanges 51 is disposed on the lower surface, and each of the welding flanges 51 is spot-welded to the overlapping portion, so that each of the front and rear of the cross member 5a is Flange 51
In either case, the rear end of the header panel 3 and the front end of the rear floor panel 4 are spot welded, so that the welding strength of each panel 3, 4 to the cross member 5a is sufficiently high, and the cross Since the opening between the flanges 51 in the member 5a is closed by the panels 3 and 4, the rigidity of the cross member 5a is sufficiently increased, and the number of spot welding points can be reduced overall. However, the strength of the joint portion between the two panels 3 and 4 can be sufficiently increased.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the floor structure according to the present invention, Fig. 2 is a schematic sectional view of the main part, and Fig. 3 is a main part showing an embodiment of the conventional floor structure. It is a schematic sectional view. 3... Header panel, 4... Rear floor panel, 5a... Cross member.

Claims (1)

[Scope of utility model registration request] An automobile floor structure in which a header panel 3 forming a floor one step higher than the rear floor is coupled to a front end of a rear floor panel 4, and the front end of the rear floor panel 4 is connected to the rear end of the header panel 3 in the longitudinal direction. A cross member 5a having an inverted hat shape in cross section and having a pair of front and rear welding flanges 51 is disposed on the lower surface of the overlapping portion of both panels 3 and 4 over a predetermined width, and each of the welds is An automobile floor structure characterized in that flanges 51 are spot welded to the overlapping portions.