JPS5918943Y2 - Automotive body floor structure - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the floor structure of an automobile body, and in particular aims at reinforcing a tunnel portion provided in the floor.

As shown in FIG. 1, in the case of a front-wheel drive vehicle, a tunnel portion 2 extending in the front-rear direction is shallowly bulged out in the center of the front floor panel 1 in the left-right width direction in order to improve comfort. Pipes for brakes, fuel, etc. extending to the panel 3 side are arranged.

In this case, there is a problem that the rigidity of the floor panel decreases and the tunnel portion becomes a source of vibration.

In order to solve this problem, it has been proposed that a reinforcing plate 4 is attached to the entire lower back surface of the tunnel part 2 with a gap formed therein to form a closed cross section 5 to increase the rigidity of the tunnel part 2, as shown in the figure. (for example, Utility Model Application Publication No. 51-11391)
(See Publication No. 3).

However, when a closed cross section is formed over the entire length of the tunnel section 2 as described above, the interior size of the tunnel section 2 becomes narrow, and the size of the tunnel section itself becomes too small to arrange a pipe or the like inside the tunnel section 2. There is a problem in which the amount of bulge must be increased by increasing .

This idea was made in view of the above problem, and includes a front floor panel provided with a tunnel section extending in the front-back direction in the center, a refraction member bent upward from the rear of the front floor panel, and a refraction member bent upward from the rear of the front floor panel. A vehicle body floor including a floor panel extending horizontally from the upper end of the member to the rear, wherein the tunnel portion of the front floor panel has a reinforcing member overlaid and joined to the lower surface thereof over the entire length of the tunnel portion, and this reinforcing member The member extends rearward from the bent portion, is bent upward from this extended portion, and is connected to the rear floor panel. □The reinforcing member forms a closed section at the bent portion, and the rigidity of the reinforcing member is reduced to the rear floor panel. This is achieved by forming a closed cross section with the panel, thereby improving the rigidity of the tunnel part, and by overlapping reinforcing members on the back side of the lower part of the tunnel, muffled noise at the lower part of the tunnel is eliminated. To provide a vehicle body floor structure for a special motor vehicle, which is characterized by being able to maintain a wide range of sizes.

Hereinafter, this invention will be explained in detail with reference to embodiments shown in FIG. 2 and subsequent figures.

In the center of the front floor panel 10 in the left and right width direction,
A tunnel portion 11 bulging upward in an inverted manner is provided in the front-rear direction and extends to the rear end of the front floor panel 10, to which a rear floor panel 12 is connected.

The rear floor panel 12 is similar to the front floor panel 10.
A lower horizontal part 13 whose front edge overlaps the upper surface of the rear edge, a bent part 14 bent upward from the rear end of the lower horizontal part 13, and an upper horizontal part 1 which extends horizontally rearward from the upper end of the bent part 14.
5, and the lower horizontal part 13 has a tunnel part 11.
A continuous tunnel portion 16 is formed.

In addition, the front floor panel 10 and the rear floor panel 1
The connection part with the bending part 14 is not limited to the above embodiment, and the connection part with the bending part 14
is formed continuously with the front floor panel 10, and a bent portion is provided at the rear end of the front floor panel 10 that is bent upward and extends horizontally from the upper end to the rear, and the horizontal portion is formed on the lower surface of the front edge of the rear floor panel 12. May be joined.

Alternatively, the bending part 14 is formed of a separate member from the front floor panel 10 and the rear floor panel 12, and joint parts extending horizontally are provided at both upper and lower ends of the bending member, so that the upper surface of the rear end of the front floor panel and the lower surface of the front end of the rear floor panel are provided. The bending part 14 may have a structure in which the bending part 14 is formed with a tunnel part 16 that is continuous with the tunnel part 11 formed in the front floor panel.

17 is a reinforcing member integrally molded with a strong rigid plate,
The front floor panel overlapping portion 18 overlaps and abuts the entire lower back surface of the tunnel portion 11 of the front floor panel 10 and abuts the front floor panel 10 on both left and right sides of the tunnel portion 11, and from the rear end of the front floor panel 10. Between the lower horizontal part overlapping part 19 that extends along the tunnel part 16 of the lower horizontal part 13 of the rear floor panel 12 and the lower back surface of the rear floor panel 12 that extends rearward from the bent part 14 of the rear floor panel 12 and then bends upward. and a closed cross-section forming part 21 forming a closed cross-section 20.

In the closed cross-section forming portion 21, both left and right sides of the lower horizontal overlapping portion 19 are bent upward to abut against the bending portion 14, and at the upper end of the portion that extends rearward from the bending portion 14 and then bends upward. A rear floor panel joint portion 22 is provided which is bent horizontally and comes into contact with the lower back surface of the upper horizontal portion 15 of the rear floor panel 12.

The reinforcing member 17 having the above-mentioned shape extends from the front floor panel overlapping portion 18 to the tunnel portion 11 of the front floor panel 10.
The rear floor panel joining portion 22 of the closed cross section forming portion 21 is welded to the rear floor panel 15 to form a closed cross section 2 having a generally trapezoidal horizontal cross section.
0 and is fixed.

Front floor panel 10 overlapped with the reinforcing member 17
An anchor nut 23 for a seat belt is attached to the upper part of the tunnel portion 11.

Note that this invention is not limited to the above-mentioned embodiment, and as shown in FIG.
5, the joint 22' of the closed section forming part 21 of the reinforcing member 17 may be welded and fixed, and the bent section 14 of the rear floor panel 12, the cross member 25, and the reinforcing member 17 may form the closed section 20. In the example, the rigidity of the reinforcing member 17 is further increased.

As described above, when the reinforcing member is brought into contact with the back surface of the lower side of the tunnel of the front floor panel and overlapped, and is attached to the bent part at the rear end of the tunnel part to form a closed section with the rear floor panel, the closed section is The formation improves the rigidity of the reinforcing member, thereby increasing the rigidity of the tunnel section itself.

Therefore, less vibration is generated, and the mounting strength of the seatbelt anchor nut attached to the tunnel portion is improved, thereby improving safety.

Moreover, it has various advantages such as being able to arrange pipes without increasing the diameter of the tunnel portion.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a floor of an automobile showing a conventional example, Fig. 2 is a perspective view of a floor showing an embodiment of this invention, Fig. 3 is a sectional view taken along the line III--III of Fig. 2, and Fig. 4. FIG. 2 is a sectional view showing another embodiment of the invention. DESCRIPTION OF SYMBOLS 10...Front floor panel, 11...Tunnel part, 12...Rear floor panel, 13...Lower horizontal part, 14...Bending part, 15...Upper horizontal part, 17...
... Reinforcement member, 18... Front floor panel overlapping part, 20... Closed cross section, 21... Closed cross section forming part, 25.
・Cross member

Claims (1)

[Scope of utility model registration request] The front floor panel includes a front floor panel provided with a tunnel portion extending in the front-rear direction in the center, a bending member bent upward from the rear of the front floor panel, and a bending member extending horizontally rearward from the upper end of the bending member. A reinforcing member is overlapped and joined to the lower surface of the tunnel portion of the front floor panel over almost the entire length of the vehicle body floor, and this reinforcing member is extended rearward from the bent portion and upward from the extended portion. A car body floor structure for an automobile, which is bent and connected to a rear floor panel, and the reinforcing member forms a closed section at the bend.