JPS6318550B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the shape of a flange of an automobile body, particularly to the shape of a vehicle body flange that joins an outer panel and an inner panel of a rear pillar.

Conventional flange shapes for automobile bodies include:
"Automotive Engineering Complete Book Volume 13, Passenger Car Body, Edited by Automotive Engineering Complete Book Editorial Committee, Publisher Sankaido Co., Ltd."
Shown on page 24. The details of this are as follows:
There is something like the one shown in Figure 3. The figure particularly shows the joining flanges 4 and 5 between the rear fender outer panel 2 forming the inclined rear pillar part 1 and the rear fender inner panel 3 on the back side. It is assembled. In this case, the flanges 4, 5 have a band-shaped frame along the outer edge of each panel 2, 3, and the width dimension W of each flange 4, 5 is
Each panel is formed to have approximately the same dimensions.
The above-mentioned spot welding of the flange portion is carried out in the car body assembly process at the factory, and the assembled car body is then transported to the painting process. In the painting process, a predetermined coating is applied sequentially through steps such as pretreatment, undercoating, intermediate coating, and topcoating.
Particularly in the pretreatment and undercoat painting processes, there is a trend in recent years to use the dip method. The dip method has many advantages, such as being able to easily treat every nook and cranny inside the car body. Normally, the car body is transported suspended on a conveyor while washing tanks, chemical conversion treatment tanks, electrodeposition coating tanks, etc. They are passed through one by one and subjected to immersion treatment. After taking the car body out of the electrocoating tank, it is once again washed in a deep water tank to wash away the paint adhering to the surface and the paint that has accumulated inside, before being sent to the next painting process.

However, when the washing water flows down from the car body after the car body has passed through the electrodeposition washing process, for example, water on the outer surface of the rear fender 2 easily flows down, but there is a gap between the outer panel 2 and the inner panel 3. It takes time to drain the accumulated water. That is, the second
As shown by the arrow marks in the figure, water flows down along the inner walls 2a, 3a of each panel 2, 3, and also enters the gap between the flange abutting surfaces, which have a large flow resistance, and this water further flows to the slanted flange end. It flows down along the edge, so it takes time to flow down. In the case of the conventional flange shape, the water that flows down along the flange remains even during the drying process after electrodeposition washing, and the flange transitions from falling to horizontal at the corner 6.
This overflows and flows onto the outer surface of the rear fender 2. For this reason, the drying conditions of the outer surface of the rear fender 2 in the area where the flushing water flows down are different from those in other areas, and in some cases, the electrodeposited coating film may be redissolved. , the painted surface becomes mottled and the electrodeposited surface has a poor finish. In such cases, problems arise, such as the need to repair defective areas by polishing them after the electrodeposition coating has dried.

This invention was made by focusing on these conventional problems, and by making the joint flange between the outer panel and the inner panel into a special shape, the flowing water is separated from the car body as much as possible in the middle, and the water is separated from the car body at the corner. The purpose is to solve the above problem by preventing some of the water that has reached the vehicle from overflowing to the outer surface of the vehicle body.

The structure of the present invention for achieving the above object is characterized in that one or more water cutouts are provided in the joint flange portion between the outer panel and the inner panel so as to form as sharp an angle as possible.

The present invention will be explained below based on the drawings.

FIGS. 4 to 7 are diagrams showing embodiments of the present invention. Note that the same parts as in FIGS. 1 to 3 are given the same reference numerals.

First, to explain the configuration, the flange 1 that joins the outer panel 2 and inner panel 3 of the rear fender
0 and 11, one or more (three in FIG. 4) water cutouts 12 are provided in the inclined portion of the rear pillar portion 1. This water cutout 12
The number is not particularly limited, and may be determined as appropriate depending on the draining condition. The shape of the cutout may be arbitrarily determined, such as the square shown in Figure 5a, the triangle shown in Figure 5B, or the semicircle shown in Figure 5C, but the shape of the cutout may be arbitrarily determined, such as the rectangular shape shown in Figure 5a, the triangle shown in Figure 5B, or the semicircle shown in Figure 5C. The draining effect will be better if the corner portion A is formed into the sharpest protrusion shape possible.

Furthermore, regarding the width dimensions of both flanges 10 and 11, as shown in FIG. 6, the width W of the flange 10 of the outer panel 2 is made longer than the width of the flange 11 of the inner panel 3 by a predetermined dimension H, and a step is provided. . The value of the predetermined dimension H may be approximately several millimeters, and in short, it may be a length that can prevent the flowing washing water from flowing down to the outer surface side of the outer panel 2.

In this way, the width of the outer panel flange is
By making it wider, the washing water in the gap between both flanges can easily flow out through the wider flange of the outer panel.

Next, the action will be explained.

For example, when a car body is lifted from a washing tank after electrodeposition painting, the washing water adhering to the car body quickly flows down.
At this time, the water adhering to the inner wall 2a of the outer panel 2 and the inner wall 3a of the inner panel 3 also passes through the contact gap between the flanges 10 and 11 and reaches the edges of the flanges 10 and 11 with a slight delay, as in the conventional case, and mainly It flows down while being guided by the flange step dimension H section. However, when this flowing water reaches the water cutouts 12 provided in the flanges 10 and 11, its flow is blocked by the sharp corner portion A, and it leaves the flanges and drips. Moreover, rear pillar part 1
As shown in cross section in Fig. 7, the roof 1 of the vehicle body
3 and downward as the vehicle width increases, dripping water always falls on the 1n side of the vehicle interior. Furthermore, the horizontal portions 10a, 1 of the flanges 10, 11 without dripping at each corner portion A.
Since the flowing water that has reached 1a is blocked by the step dimension H, it does not overflow to the outer panel 2 side and falls to the flange 11a side. Therefore, it is possible to completely prevent the risk of paint defects caused by the washing water flowing down the flange 10a side, that is, the outer surface of the outer panel 2 of the rear fender, as in the conventional case.

As explained above, according to this invention,
Because the flange of the rear pillar is provided with a step and one or more water cutouts, for example, during the drying process of electrodeposition coating, washing water flows out and flows down the outer surface of the outer panel of the rear fender, resulting in defective coating on the outer surface. This phenomenon can be prevented. As a result, the conventional repair work by sharpening is no longer necessary, and it is possible to reduce the number of man-hours and to prevent contamination of the working environment due to dust.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main parts of a vehicle body with a conventional flange shape, Fig. 2 is an enlarged perspective view of the part shown in Fig. 1,
3 is a sectional view of FIG. 2, FIG. 4 is a side view of the main part of an embodiment of the present invention, and FIG. 5 is an enlarged view of the main part of FIG. 4, and a, b, and c are respectively An example of the shape, Figure 6 is a cross-sectional view of Figure 4,
FIG. 7 is also a cross-sectional view along the arrow - in FIG. 4. 1...Rear pillar, 2...Outer panel, 3...
...Inner panel, 10, 11...Flange, 12
...Water cutout, W... (on the outer panel)
Flange width.

Claims (1)

[Claims] 1. An automobile characterized in that the width of the flange of the outer panel of the rear pillar is made wider by a predetermined dimension than the width of the flange of the inner panel, a step is provided in the flange portion, and one or more drainage notches are provided in the flange portion. Body flange shape.