JPH0114070B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION -Technical Field of the Invention- The present invention relates to an automobile body structure, and more particularly to a dart lower panel structure joined to a dart upper panel.

-Prior art- Recently, in automobiles as shown in Fig. 1,
In order to improve the sound insulation between the engine room A and the passenger compartment B, a dart lower panel 4 having a sandwich structure consisting of an outer panel 2 and an inner panel 3 with an insulator 1 interposed therebetween is often used.

By the way, this darth lower panel 4 is joined to the darthicle upper panel 5 by a forward facing flange 2a formed at the upper end of the darth lower outer panel 2, and from this joint, rainwater etc. In order to prevent water from entering, a sealing material 6 is applied from the inside of the vehicle compartment B (see Figure 2).
Since a is hanging down, it is not easy to apply the sealant 6 using the sealer gun G. For this reason, conventionally, a structure has been proposed in which the upper end of the darts lower inner panel 3 is bent toward the darts lower outer panel 2, joined thereto, and then folded back to guide the sealer gun G (for example, , Utility Model Publication No. 58-23779). Therefore, this structure has the advantage of increasing the rigidity of the dart lower panel 4 and making it easier to apply the sealant 6.
Another problem, such as poor dimensional accuracy of the forward-facing flange 2a of the lower outer panel 2 of the darts lower outer panel 2 that is joined to the upper panel 5 of the darts, could not be solved. That is, a tunnel portion 4a (shown in the first figure) is located at the center of the lower part of the vehicle lower panel 4 in the vehicle width direction.
Draw and form. In this case, the forward-facing flange 2a at the center in the vehicle width direction moves toward the front of the vehicle due to the springback of the darts lower panel 4, resulting in the forward-facing flange 2a and the darts upper panel 5 being in an incorrect position, which is an obstacle to assembling the vehicle body panel. becomes.

-Object of the Invention- The present invention has been made in view of the actual situation of the darts lower panel having the conventional sandwich plate structure as described above.
To obtain a structure in which the rigidity of a darts lower panel is high, the application of a sealing material is easy, and the forward-facing flange of the darts lower outer panel has high dimensional accuracy.

-Structure of the Invention- In order to achieve this object, the present invention forms a chevron-shaped bead toward the indoor side at the upper end of the lower outer panel of the dussy, and connects the upper end of the lower inner panel to the bead. At the same time, we propose a structure in which the sealer gun is guided by the upper surface of the bead.

-Example- Hereinafter, details of an example of the present invention will be explained with reference to FIG.

FIG. 3 is a sectional view corresponding to FIG. 2 showing the structure of the present invention, and the same reference numerals are given to the same structural parts as in FIG. 2. The feature of the present invention lies in the chevron-shaped bead 7 formed at the upper end of the lower outer panel of the dart, and the chevron-shaped bead 7 has a trapezoidal cross section.
It extends across the entire vehicle width direction of the dart lower panel 4, and protrudes from the engine room A side toward the interior of the vehicle compartment B. Further, the upper end portion 3a of the darts lower inner panel 3 is joined to the top surface 7a of the chevron-shaped bead 7, and the upper side surface 7b of the chevron-shaped bead 7
is used as a guide for Sealagun G. In the case of the illustrated embodiment, the upper side of the chevron-shaped bead 7 is longer than the lower side, so that the upper side surface 7b ends at a position that is oddly forward of the vehicle body than the general surface of the lower outer panel 2, so that it faces forward. Since it is continuous with the flange 2a, there is also the advantage that the application position of the sealing material 6 is separated from the rainwater guide 5a of the dash upper panel 5, making the application work easier.

Since the illustrated embodiment has the above structure,
Since the darts lower outer panel 2 and the darts lower inner panel 3 are joined at the chevron-shaped bead 7 position, the rigidity of the darts lower panel 4 as a whole is strengthened, and the sloped upper surface 7b of the chevron-shaped bead 7 is utilized. Then, the sealing material 6 can be applied to the joint between the dart upper panel 5 and the dart lower panel 4. Since the bending rigidity of the upper end portion of the needle lower panel 4 is particularly increased due to the formation of the chevron-shaped bead 7, even if a tunnel portion 4a (shown in the first figure) is formed at the lower part of the needle lower panel 4, the needle The upper end of the lower panel 4 is not bent due to the processing of the tunnel portion 4a, and the position of the forward-facing flange is thereby stabilized, thereby improving the dimensional accuracy of this portion.

-Effects of the Invention- As is clear from the above description, the present invention not only strengthens the rigidity of the darts lower panel having a sanderch structure and facilitates the application of sealant, but also improves the rigidity of the darts lower panel at the upper end of the darts lower panel. By improving the dimensional accuracy of the forward-facing flange, the vehicle body panel assembly work can be easily and reliably performed.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional peripheral structure, FIG. 2 is an enlarged sectional view of the upper end joint, and FIG. 3 is a sectional view corresponding to FIG. 2 of the structure of the present invention. 1...Insulator, 2...Dutch lower outer panel, 2a...Front-facing flange (of the needle lower outer panel), 3...Dutch lower inner panel, 4...Dutch lower panel, 5...Dutch upper panel , 6... sealing material, 7... chevron-shaped bead.

Claims (1)

[Scope of Claims] 1. A darts lower panel structure in which a forward facing flange at the upper end of a darts lower panel made of a sandwich board is joined to the lower surface of the darts lower panel, and a sealing material is applied to the joint from the indoor side, A chevron-shaped bead extending across the entire width of the vehicle is molded into the vehicle interior at the upper end of the lower outer panel, and the upper end of the lower inner panel is separated from the upper panel on the top surface of the chevron-shaped bead. The darts lower panel structure is characterized by being joined at certain points. 2. The dart lower panel structure according to claim 1, wherein the chevron-shaped bead has an upper side longer than a lower side.