JPH038542Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to improvements in the floor structure of automobiles.

(Prior Art) Conventionally, as shown in FIGS. 3 and 4, the rear seat pan 1, the rear floor pan 2, and the rear cross member are attached to the fixed portion a' of the two-layered rear seat pan 1 and the rear floor pan 2. 3. Three-ply fixed part
An automobile floor structure in which b' is shifted toward the rear of the vehicle body has been proposed (see Japanese Utility Model Application Publication No. 196379/1983).

By the way, in a floor structure in which a cross member is interposed between the front floor panel and the rear floor panel, the anchor load of the seat belt attached to the front floor panel acts, so the front floor panel itself is reinforced and the front floor It is desirable to strengthen the joints between panels and cross members.

(Purpose of the invention) The present invention was made in response to the above-mentioned request, and is to devise a joint structure between the front floor panel and the cross member so that the front floor panel can be firmly joined to the cross member. The purpose is to

(Structure of the invention) Therefore, the present invention includes a front floor panel in which a tunnel portion extending in the longitudinal direction is formed in the center portion of the vehicle width direction, and a reinforcement layer overlaid on the upper part of the tunnel portion of the front floor panel. and a rear floor panel located behind the front floor panel, and a cross member interposed between the front floor panel and the rear floor panel and formed into a closed cross section by a cross member top and a cross member. The front floor panel and cross member are the front side of the front extension formed on the cross member top, the reinforcement, the front three-piece joint with the front floor panel, and the front extension of the cross member top. The structure is characterized in that the rear side of the cross member is connected to the rear side of the cross member, the rear extension part of the reinforcement, and the front extension part of the cross member lower at a rear three-piece joint part.

(Effects of the invention) According to the invention, the front floor panel, reinforcement, and cross member are stacked three on top of each other, and these three stacked parts are joined in two rows in the front and back. Since then, the joint strength between the front floor panel and cross member has improved,
The anchor load on the front floor panel can now be carried by the cross member.

Furthermore, since the joint between the front floor panel and the cross member is reinforced, the bending and torsional strength of the front floor panel is improved and deformation is reduced.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the front floor panel 10 includes a trapezoidal tunnel portion 1 that protrudes upward at the center in the vehicle width direction and extends in the front-rear direction.
0a is formed.

Tunnel portion 10 of the front floor panel 10
At the top of a, there is a trapezoidal reinforcement 1.
1 are overlapped and joined, and both side flange parts 11a, 11a of the reinforcement 11 are
It is joined to the upper surface of the front floor panel 10.

A rear floor panel 12 is arranged at the rear upper part of the front floor panel 10.

A cross member 13 interposed between the front floor panel 10 and the rear floor panel 12
is formed into a closed cross section by the cross member upper 14 and the cross member lower 15, and the central front part 14a (front extension part) of the cross member upper 14 fits into the upper part of the reinforcement 11. It has a trapezoidal shape and extends forward, and both front parts 14b, 14b are joined to the upper surface of the front floor panel 10.

The rear part 14c of the cross member upper 14 and the rear part 15a of the cross member lower 15 are joined to the lower surface of the rear floor panel 12 in a three-layered manner.

Further, the front portion 15b of the cross member lower 15 is joined to the back surface of the inclined portion 14d of the cross member upper 14.

On the other hand, the front side of the central front part (front extension part) 14a of the cross member top 14, the rear part 11b of the reinforcement 11, and the front floor panel 1
The rear part 10b of 0 is made of three overlapping pieces, and this part is joined by spot welding or the like as a front three-piece joint part a.

Further, the rear side of the central front part (front extension part) 14a of the cross member upper 14, the rear extension part 11c of the reinforcement 11, and the front extension part 15c of the cross member lower 15 are three stacked. This part is joined by spot welding or the like as a rear three-piece joint part b.

Note that the vertical wall portion 11d of the reinforcement 11 has a seat belt anchor attachment portion 11.
e is provided.

With the above configuration, in the tunnel portion 10a of the front floor panel 10, the front floor panel 10, the reinforcement 11, and the cross member (cross member upper 14, cross member lower 15) 13 are mutually arranged in three pieces. overlapped,
These three-layered portions are joined in two rows, front and rear, with a front three-layer joint a and a rear three-layer joint b.

Therefore, the joint strength between the front floor panel 10 and the cross member 13 is improved, so that the anchor load applied from the anchor attachment portion 11e of the reinforcement 11 to the front floor panel 10 is reduced to the strong front and rear joints a. , b to the highly rigid cross member 13,
The anchor load can now be carried by the cross member 13.

In addition, the joints a and b between the front floor panel 10 and the cross member 13 are reinforced, and the vertical wall 1 of the reinforcement 11 is reinforced.
1d and the center front part 14a of the cross member top 14
The vertical wall portion 14e of the front floor panel 10
Since the tunnel portion 10a of the front floor panel 10 is reinforced, the bending and torsional strength of the front floor panel 10 is improved, deformation is reduced, and vibrations and the like are reduced.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the floor structure according to the present invention, Fig. 2 is an enlarged sectional view of Fig. 1, Fig. 3 is a perspective view of a conventional floor structure, and Fig. 4 is - of Fig. 3.
It is an enlarged sectional view. DESCRIPTION OF SYMBOLS 10... Front floor panel, 10a... Tunnel part, 11... Reinforcement, 11c... Rear extension part, 12... Rear floor panel, 13... Rear cross member, 14... Cross member top, 14
a...Central front part (front extension part), 15...Cross member lower, 15c...Front extension part, a...Front side three-piece joint part, b...back side three-piece joint part.

Claims (1)

[Scope of Claim for Utility Model Registration] A front floor panel in which a tunnel portion extending in the front-rear direction is formed in the center of the vehicle width direction, a reinforcement overlaid on the upper part of the tunnel portion of the front floor panel, and the above-mentioned. A rear floor panel located behind the front floor panel, and a cross member interposed between the front floor panel and the rear floor panel and formed in a closed cross section by a cross member top and a cross member lower, The front floor panel and cross member are the front side of the front extension formed on the cross member top, the reinforcement, the front three-piece joint with the front floor panel, and the front extension of the cross member top. A floor structure for an automobile, characterized in that the floor structure is joined at a rear side, a rear extension part of a reinforcement, and a rear extension part of a lower cross member at a rear three-piece joint part.