JPS6346979A - Floor structure for automobile - Google Patents

Abstract

PURPOSE:To prevent the paint solution from remaining at the car body in the electrodeposition painting process, by forming a floor panel in a slope higher at the center in the car width direction, and furnishing bead members at the slope. CONSTITUTION:A floor panel 10 is formed in a slope 13 higher at the center 11 in the car width direction and lower at the both ends in the width directions composing the section in about a chevron form. On the slopes 13 several lines of beads 14 projecting to the lower sides are formed parallel in the car width direction. Those bead members 14 are linked to grooves 15 formed at the outer sides 12 of the slopes 13. When the panel is painted in an electrodeposition, the paint solution flows from the beads 14 to the grooves 15, and then drops down through holes 17 and the like. As a result, no paint solution remains in the car body.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in the floor structure of an automobile.

(Prior Art) Since it is preferable for a floor panel of a vehicle body to have high rigidity, a plurality of beads are generally formed in the vehicle width direction. For such a floor structure, Utility Model No. 60-145975
As disclosed in the above publication, a floor bar having a large number of beads protruding upward is formed into a curved surface protruding downward, and the radius of curvature of the upper surface of each bead is set larger than the radius of curvature of the curved surface. There are known structures in which the structure is formed as close to a substantially flat surface as possible.

(Problem to be solved by the invention) However, in a floor structure in which beads are formed on the floor panel as described above, N@
This causes inconvenience in the painting process.

That is, as shown in FIG. 6, the undercoating of the car body is carried out by suspending the car body 1 from a conveyor 2, dipping it in an electronic paint tank 3, and conveying it.

However, since the bead forms a downwardly-opening recess on the bottom surface of the floor panel, air bubbles accumulate inside the recess, making it impossible to completely paint the inside of the recess in the tank 3, resulting in rust, etc. It is the cause.

In addition, the bead formed on the upper surface of the floor panel and having an upwardly opening shape collects paint liquid while being conveyed in the tank 3, and unnecessary paint liquid remains in the bead even when the tank is taken out.
This leads to an unnecessary loss of paint liquid in tank 3.

To prevent this, there is a method to prevent problems caused by air bubbles and residual paint by providing holes in the floor panel for handling air or liquid, but this method requires a large number of holes. In addition, it is necessary to close the hole after painting is completed. Requiring a hole-opening step and a base hole step as described above is undesirable because it complicates the manufacturing process.

Therefore, according to the present invention, complete painting can be performed even in the recesses on the lower surface of the floor, and the recesses on the upper surface of the floor can be completely coated.
1. An object of the present invention is to provide a floor structure that prevents paint liquid from being carried away.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the floor structure of an automobile according to the present invention has a floor structure including a center portion in the vehicle width direction and a circle in the vehicle width direction located below the center portion. The floor panel has an outer end portion and an inclined surface portion connecting the central portion and the circular outer end portion, and a plurality of beads extending in the vehicle width direction and projecting downward are formed on the inclined surface portion. A groove projecting downward and extending in the longitudinal direction is formed in the outer end portion in the vehicle width direction, and the outer end in the vehicle width direction of each bead is communicated with the groove portion.

(Effects of the Invention) In the vehicle body floor structure according to the present invention, the floor panel has an inclined surface portion whose outer end in the vehicle width direction is located below the center portion in the vehicle width direction, and a plurality of beads extending in the vehicle width direction on the inclined surface portion. By forming the bead and making it communicate with the groove formed in the longitudinal direction of the car body at the outer end of the circle, the paint liquid flows downward inside the bead and enters the groove in the electro-painting process, and the car body As it is moved by the conveyor, it moves toward the rear of the vehicle within the groove and falls outward from the rear end of the vehicle. This prevents the vehicle from being taken out of the tank with unnecessary paint remaining on the bead on the upper surface of the floor panel. Therefore, it is preferable that the coating liquid in the coating tank is not reduced wastefully.

In addition, the air bubbles in the recess that opens at the bottom of the floor panel move to the center above the recess, and as the conveyor moves, the air bubbles move inside the center toward the rear of the vehicle body, so they completely fill the recess on the bottom of the floor panel. The paint liquid can penetrate and completely coat the inside of the recess. Therefore, it is possible to eliminate rust on unpainted parts, and to perform rational and reliable painting.

(Example) Hereinafter, an example of the floor structure according to the present invention will be described using the drawings.

As shown in FIG. 1, the floor panel 10 according to the present invention has a high center portion 11 in the vehicle width direction and a circular outer end portion 12, 12 in the vehicle width direction.
A sloped surface portion 13.13 with a low slope is formed and has a substantially mountain-shaped cross section.

This inclined surface portion 13.13 has a bead 14 projecting downward.
A plurality of stripes are formed on each inclined surface portion 13.13 in parallel to the vehicle width direction.

These beads 14 are connected to grooves 15 formed in the outer end 12.
is communicated with. This groove 15 is formed in a straight line in the longitudinal direction of the vehicle body, and in this embodiment, the groove 15A on the rear side of the vehicle body is formed deeper than the groove 1513 on the front side, so that a structure is created in which the paint is easily guided to the rear side. It is being

A cross-sectional view of the groove portion 15 taken in the longitudinal direction of the vehicle body is shown in FIG. A convex portion 16 is provided at the center of the groove portion 15 in the longitudinal direction of the vehicle body.
is formed and a cross member (not shown) is welded from the bottom side. The inclined surface 316a of the convex portion 16 on the front side of the heavy body must be formed with a gentle slope, and the sloped surface portion 15a of the groove portion 15A on the rear side of the vehicle body must also be formed with a gentle slope.

This gentle slope means a slope that is gentler than the angle at which the N-coated paint tank is taken out by comparison during electrodeposition coating.

Next, the flow of the paint liquid to the floor panel in the electrodeposition paint tank will be explained with reference to FIGS. 1 and 3. As described above, the vehicle body enters the paint tank from the front of the vehicle body, is conveyed by a conveyor, and exits from the front upwards.

Due to the bead 14 formed on the floor panel 10, the paint liquid on the upper surface of the floor panel flows from the bead 14 to the groove 15 along the arrow A due to the slope of the inclined surface portion 13, and as the vehicle body is transported by the conveyor, it flows inside the groove toward the rear of the vehicle body. flows to At this time, since the inclined surface 16a of the convex portion 16 is gentle, the paint liquid on the front side of the vehicle body moves smoothly in the groove portion 15 toward the rear side of the vehicle body, and flows through the hole portion 17 etc. as indicated by arrow A' in FIG. The paint liquid does not remain in the bead after falling down or flowing out from the rear edge of the floor panel 10 to the outside.

In addition, on the lower surface side of the floor panel, air bubbles in the recessed portion opened downward are upwardly disposed along the inclined surface portion 13, and as shown by the arrow B.
As the conveyor transports, it moves toward the rear of the vehicle body in the direction of arrow B' and exits to the rear.

Therefore, the paint liquid permeates into the recesses without being hindered by air bubbles and is completely coated.

Further, FIG. 4 is a schematic cross-sectional view in the vehicle width direction of the front side portion of the vehicle body of the floor panel according to the embodiment of the present invention.

Conventionally, there are some floor panels in which a tunnel portion is formed in the center in the single width direction. Although this improves the strength of the floor compared to a flat floor, it has the disadvantage that the tunnel protrudes into the interior of the vehicle, making the interior of the vehicle narrower. Therefore, in applying the present invention while leaving the tunnel structure, a conventional tunnel 21 is formed in the floor panel as shown in FIG. Preferably, the floor panel has an inclined surface section 23.23 that descends towards the bottom.

As shown in FIG. 5, a cross section taken along the line v-V in FIG. (d)).

With this type of floor structure, the tunnel rigidity of the floor panel is ensured, and the problem with electric @ painting mentioned above can also be solved, and since the tunnel part does not protrude into the center, the floor panel becomes flat, making it easier to walk inside the car etc. It's convenient. The interior of the vehicle is generally spacious, and when applied to the luggage compartment of a truck, cargo can be loaded in the tunnel section, expanding the luggage compartment space.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of a vehicle floor structure according to the present invention, FIG. 2 is a cross-sectional view of the groove portion of the embodiment in the longitudinal direction of the vehicle body, and FIG. 3 is a cross-sectional perspective view of the inclined surface portion of the embodiment. FIG. 4 is a schematic cross-sectional view in the vehicle width direction of another embodiment according to the present invention, FIG. 5 is a schematic cross-sectional view in the longitudinal direction of the vehicle body of the above-mentioned embodiment, and FIG. 6 is a schematic diagram of the electro-coating method. DESCRIPTION OF SYMBOLS 10... Floor panel 11... Vehicle width direction center part 12... Vehicle width direction outer end part 13... Inclined surface part 1
4...Bead 15...Groove part 2
Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] A floor comprising a center portion in the vehicle width direction, both outer end portions in the vehicle width direction located below the center portion, and an inclined surface portion connecting the center portion and both outer end portions. a panel, a plurality of beads protruding downward and extending in the vehicle width direction are formed on the inclined surface portion, a groove extending in the longitudinal direction protruding downward is formed on the outer end portion in the vehicle width direction; A floor structure for an automobile, characterized in that an outer end of each bead in the vehicle width direction is communicated with the groove.