JPS5854299Y2 - Automotive cab floor structure - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of the floor structure of a cab in a truck or the like.

Since various external forces are applied to the floor panel that constitutes the floor surface of the cab, it is necessary to reinforce the panel with side members and a rear cross member.

For this purpose, conventionally, as shown in FIGS. 1 to 5, for example, side members 2 are coupled and fixed to both sides of a floor panel 10 that constitutes the floor surface of the cab, and the rear end of the floor panel 1 is A rear cross member 3 is connected to the upper surface, and the member 3 and the floor panel 1 form a box-shaped cross section to reinforce the floor panel 1.

Further, in order to improve the reinforcement strength for the floor panel 1, it is necessary to connect the ends of both members 2 and 3, but conventionally, the ends of both members 2 and 3 are simply connected. They were only bonded by polymerization at

Therefore, the joint area between the side members 2 and rear cross member 3 is narrow, and only the joints of both members 2 and 3 are reinforced by the other member, so that the cross sections of the joints of both members 2 and 3 are It increases rapidly compared to the general cross section of members 2 and 3.

If the cross section changes suddenly in this way, stress tends to concentrate at the core, which has the disadvantage of reducing the reinforcing efficiency of both members 2.3.

This idea was made in view of the above, and by improving the joint structure of the part of the corner where the floor panel, side members, and rear cross member are concentrated, it is possible to avoid the concentration of stress in each member. The purpose is to improve the reinforcement m for the panel.

This invention will be explained in detail below based on the embodiments shown in FIGS. 6 to 13.

In the figure, a floor panel 10 constituting the floor surface of the cab
An upward flange 11 for coupling and fixing the side member 20 is formed by bending on the side edge, and a downward flange 12 for coupling and fixing the rear cross member 30 is formed by bending at the rear edge.

The side member 20 is formed in a cross-sectional shape having a vertical wall 21 and a horizontal wall 22, and has an upward flange at the upper end of the vertical wall 21, which is joined and fixed to the single flange 11 of the floor panel 10. 23 and a horizontal flange 24 which is joined and fixed to the lower surface of a part of the corner of the floor panel 10, and a downward flange 25 is formed at the outer peripheral edge of the horizontal wall 22.

On the other hand, the rear cross member 30 has a rear wall 31, a top wall 32, and an inclined front wall 33, each having a U-shaped cross section. A downward flange 34 is formed to be fixed to the downward flange 12, and a horizontal flange 35 is formed at the lower end of the front wall 33 to be fixed to the rear upper surface of the floor panel 10.
is formed.

Therefore, when the side members 20 and the rear cross member 30 are connected and fixed to the floor panel 10 at the required positions, the side walls 22 of the side members 20 are located below the floor panel 10, and the rear cross member 30 is connected to the floor panel 10. They cooperate with each other to form a box-shaped cross-section and reinforce the floor panel 10, respectively.

Here, the rear end portion of the side member 20 is bent and extended along the rear cross member 30, and the side end portion of the rear cross member 30 is bent and extended over the side member 20.

At the extension part of the side member 20, the horizontal wall 22
is gradually brought closer to the lower surface of the floor panel 10 and is bonded and fixed to the panel 10.

Also, in the extended portion of the rear cross member 30, the top wall 32 is gradually inclined downward, and the side member 20
It is bonded and fixed to the upper surface of the horizontal wall 22 of.

That is, the side member 20 and the rear cross member 30 are
The end portions are bent and extended so as to be along the mating member, and the cross section of the extended portion is gradually reduced so that the respective ends are substantially connected to the mating member.

Therefore, the side member 20 reinforcing the floor panel 10
Since the extended portions of the rear cross member 30 and the rear cross member 30 are connected to the other member, the joint area of both members 20 and 30 becomes large.

Furthermore, since the cross sections of the extensions of both members 20 and 30 are reduced as they reach their respective tips, there is no sudden change between the cross section of the joint portion of both members and the general cross section of each member.

As a result, the side members 20 and the rear cross member 30 can be firmly connected to each other without stress concentration, so that the floor panel 10 can be stably reinforced.

Incidentally, the horizontal flange 24 and the downward flange 25 of the side member 20, and the downward 7 flange 34 and the horizontal flange 35 of the rear cross member 30 are also formed as extension parts, respectively, and are joined and fixed to the members that are in contact with each member. However, the joining structure between the floor panel and both members is not necessarily limited to the embodiment.

Further, in the embodiment described above, the top wall 32 of the extension part is inclined in two stages in order to gradually reduce the cross section of the extension part of the rear cross member 30. Alternatively, as in the embodiment shown in FIG. The flat part 36 provided at the tip is joined and fixed to the upper surface of the horizontal wall 22, and both members 20.30
The bonding area may be further increased.

As explained above, according to this invention, the end portions of the side member connected to the side edge of the floor panel and the end portion of the cross member connected to the rear edge of the floor panel are bent along the respective mating members and their cross sections are Since it is substantially joined to the other member by gradually decreasing the number of parts, the joint area of both members increases, and sudden changes in the cross section of the joint part and the general cross section of each member can be avoided.

Therefore, both members can be firmly connected and fixed without stress concentration, and as a result, the reinforcing strength and stability of the floor panel can be improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional floor structure, Fig. 2 is a perspective view of section A in Fig. 1, Fig. 3 is a plan view of Fig. 2, and Fig. 4 is a rear view of Fig. 2; Figure 5 is an exploded perspective view of Figure 2, and Figure 6 is an exploded perspective view of Figure 2.
The figure is a perspective view of the main parts showing one embodiment of the floor structure according to this invention, FIG. 7 is a plan view of FIG. 6, FIG. 8 is a rear view of FIG. 6, and FIG. BB sectional view, Figure 10 is the 7th
11 is a sectional view taken along line DD in FIG. 7, FIG. 12 is an exploded perspective view of FIG. 6, and FIG. 13 is a perspective view of essential parts showing another embodiment of this invention. It is. 10...Floor panel, 11.12...
・Flange, 20...Side member, 21...
...Vertical wall, 22...Horizontal wall, 23, 24
, 25 - Flange, 30 - Rear cross member 31 - Rear wall, 32 - Top wall, 33 - Front wall, 4. 35...Flange.

Claims (1)

[Scope of utility model registration request] A floor panel constituting the floor surface of the cab, a side member having a cross-section with a cross-section having a cross-sectional shape with the upper end of the vertical wall joined to the side of the panel so that the horizontal wall is positioned below the floor panel, and the back of the floor panel. a rear cross member disposed and connected to the upper surface of the end portion and forming a box-shaped cross section in cooperation with the panel; the rear end of the side member is bent along the rear cross member, and the side wall thereof is connected to the lower surface of the floor panel. For an automobile, the rear cross member is coupled and fixed to the upper surface of the side wall of the side member by gradually reducing the height while bending the side end of the rear cross member along the side member. Cab floor structure.