JP6209768B2 - Vehicle body structure - Google Patents

Description

  The present invention relates to a vehicle body structure for dipping a vehicle body in paint in a paint reservoir and performing electrodeposition coating on the body.

  A technique related to a vehicle body structure is described in Patent Document 1. As shown in FIG. 9, the body of the passenger car described in Patent Document 1 includes a cowl panel 101 and a dash panel 102 that partition the engine room ER and the vehicle compartment R. As shown in FIG. 10, a lower end flange portion 101 f is formed at the lower end of the cowl panel 101, and an upper end flange portion 102 f is formed at the upper end of the dash panel 102. The lower end flange portion 101f of the cowl panel 101 is overlapped with the upper end flange portion 102f of the dash panel 102 from above and is partially joined. Further, as shown in FIG. 10, a gap-shaped through hole 104 is formed between the mating surfaces of the lower end flange portion 101f of the cowl panel 101 and the upper end flange portion 102f of the dash panel 102 so as to extend in the front-rear direction. Yes. For this reason, when the body of the passenger car is immersed in the paint in the paint reservoir tank, the air remaining in the corners K and the like of the dash panel 102 changes the posture of the body almost horizontally in the paint so that the cowl panel 101 and the through-hole 104 of the dash panel 102 come out upward.

JP 2006-327275 A

  However, in the above-described body structure of a passenger car, as shown in FIG. 10, the air remaining in the corner portion K of the dash panel 102 is guided forward along the horizontal portion of the dash panel 102, so that the cowl panel 101 and the dash panel It is the structure which escapes from the through-hole 104 of 102 to back upper direction. Here, in the opening portions of the through holes 104 of the cowl panel 101 and the dash panel 102, there is no portion where air can be stored. For this reason, the air guided forward along the horizontal portion of the dash panel 102 may pass through the through-hole 104 and be accumulated below the front portion of the cowl panel 101. In the case of electrodeposition coating, the portion where the air is accumulated becomes a poor coating and causes rust.

  The present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is to eliminate coating defects due to air accumulation in the body in electrodeposition coating.

The above-described problems are solved by the inventions of the claims. The invention of claim 1 is a vehicle body structure for immersing a vehicle body in paint in a paint reservoir and performing electrodeposition coating on the body. The vehicle body structure is configured to extend in the vehicle width direction. A shelf-like front panel and a rear panel provided with a shelf-like portion that also extends in the vehicle width direction, and the front-end flange portion of the shelf-like portion of the rear panel is above the rear-end flange portion of the front panel. The two flange portions are partially joined together, and a gap is formed between the mating surfaces of the two flange portions so as to penetrate in the front-rear direction. Is communicated with the gap between the flange portions, and further, an air reservoir is formed at a position lower than the gap, and the air accumulated in the lower side of the shelf is formed on the shelf of the rear panel. An inclined guide surface is provided to guide the air to the air reservoir by buoyancy. It is and, the air reservoir unit, by bending the shelf the edge of the rear end flange portion of the front panel downward, that is formed in a state such as expanding portion for rear opening of the gap It is characterized by.

According to the present invention, when the body of the vehicle is immersed in the paint reservoir, the air accumulated under the shelf-like portion of the rear panel changes the posture of the body almost horizontally in the paint, thereby increasing the buoyancy. Thus, the guide is guided to the inclined guide surface of the shelf-like portion of the rear panel and led to the air reservoir. Then, the air accumulated in the air reservoir portion is released upward from a gap formed between the mating surfaces of the rear end flange portion of the front panel and the front end flange portion of the shelf-like portion of the rear panel by buoyancy. . For this reason, the air accumulated on the lower side of the rear panel does not move and accumulate on the lower side of the front panel, and coating failure due to the air accumulation can be prevented.
In addition, air can easily accumulate in the air reservoir, and air guided forward can be prevented from passing through the rear opening.

  According to invention of Claim 2, the clearance gap formed between the mating surfaces of both the flange parts of the front side panel and the shelf-like part of the rear panel is the front side opening exposed on the front side panel, and the rear side panel. And a rear opening disposed on the lower side, wherein the gap dimension of the rear opening is set to a value larger than the gap dimension of the front opening. For this reason, the air accumulated in the air reservoir is easily guided to the gap.

  According to the invention of claim 3, the gap size of the gap is configured to gradually decrease from the rear side opening to the front side opening. For this reason, it is possible to minimize the gap size of the front opening of the gap that can be seen from the outside, and it is possible to prevent the later-stage sealer from flowing through the gap.

  According to the vehicle body structure of the present invention, it is possible to prevent poor coating due to air accumulation in the body during electrodeposition coating.

It is the perspective view which looked at the cowl panel and dash panel of a vehicle provided with the body structure which concerns on this Embodiment 1 of this invention from the vehicle interior side. It is an II arrow enlarged view of FIG. FIG. 3 is a longitudinal sectional view taken along the line III-III in FIGS. 1 and 2. It is a schematic diagram showing a mode that the body of a vehicle was immersed in the paint of the paint reservoir (initial stage). It is a longitudinal cross-sectional view showing the mode of the cowl panel and dash panel in the state of FIG. It is a schematic diagram showing a mode that the body of a vehicle was immersed in the paint of a paint reservoir (mid term). It is a longitudinal cross-sectional view showing the state of the cowl panel and dash panel in the state of FIG. FIG. 8 is a longitudinal sectional view (enlarged view taken along arrow VIII in FIG. 7) illustrating the function of the body structure according to the present embodiment. It is the perspective view which looked at the cowl panel and dash panel of a vehicle provided with the conventional body structure from the vehicle interior side. FIG. 10 is a longitudinal sectional view taken along the line XX in FIG. 9.

[Embodiment 1]
Hereinafter, a vehicle body structure according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 8. The vehicle body structure according to the present embodiment relates to a structure for efficiently removing air remaining in the body when electrodeposition coating is performed by immersing the body in the paint in a paint reservoir. Note that the front, rear, left, right, and top and bottom shown in the figure correspond to the front, back, left, right, and top and bottom of the vehicle.

<About front part outline of body 10 of vehicle>
As shown in FIGS. 1 and 3 (vertical sectional view of FIG. 1), a dash panel 20 and a cowl panel 30 that partition the vehicle compartment R and the engine room ER are provided in the vehicle width direction at the front portion of the vehicle body 10. It is formed to extend. As shown in FIG. 3, the dash panel 20 is formed in a substantially inverted L-shaped cross section from the vertical wall portion 22 and the front shelf portion 24, and the boundary position between the front shelf portion 24 and the vertical wall portion 22. Is the corner 23. The cowl panel 30 is a shelf-like panel arranged on an extension line of the front shelf-like portion 24 of the dash panel 20 and includes a cowl upper panel 33 and a cowl lower panel 35. 1 and 2, only the cowl upper panel 33 is shown.

<About the cowl panel 30>
A rear end flange portion 33f is formed at the rear end edge of the cowl upper panel 33 constituting the cowl panel 30 as shown in FIGS. The rear end edge of the rear end flange portion 33f is bent into a substantially Z shape to form the lower shelf portion 36. Also, a rear end flange portion 35f is formed at the rear end edge of the cowl lower panel 35 constituting the cowl panel 30, and the rear end edge of the rear end flange portion 35f is bent into a substantially Z shape so that the lower shelf portion 36 is formed. Is formed. Then, in a state where the cowl upper panel 33 and the cowl lower panel 35 overlap the rear end flange portions 33f and 35f and the lower shelf portion 36 with each other, at the positions of the rear end flange portions 33f and 35f, for example, by spot welding or the like. It is joined.

<Dash panel 20>
The front shelf 24 of the dash panel 20 is slightly inclined so that the front becomes higher, and a front end flange 240 is formed at the front edge of the front shelf 24 as shown in FIGS. ing. The front end flange portion 240 of the dash panel 20 is configured to be connectable to the rear end flange portions 33f and 35f of the cowl panel 30 by spot welding or the like. Further, the front end flange portion 240 of the dash panel 20 forms a gap S (see FIG. 8) between the rear end flange portions 33f and 35f of the cowl panel 30, and when the body 10 is subjected to electrodeposition coating, The air remaining inside is efficiently exhausted. That is, the cowl panel 30 corresponds to the front panel of the present invention, and the dash panel 20 corresponds to the rear panel of the present invention.

  As shown in FIG. 3 and the like, the front end flange portion 240 of the dash panel 20 has an inclined portion 245 that is inclined so that the front side is higher than the main body portion of the front shelf-like portion 24, and a front side of the inclined portion 245. It is comprised from the provided junction parts 241 and 243. Here, the inclination angle of the inclined portion 245 of the front end flange portion 240 is set to an inclination that allows bubbles to move upward without attaching fine bubbles to the lower surface of the inclined portion 245. The joint portions 241 and 243 of the front end flange portion 240 are composed of inverted trapezoidal concave portions 241 and trapezoidal convex portions 243. As shown in FIG. 2, the inverted trapezoidal concave portion 241 is a number of concave portions for welding arranged at intervals in the vehicle width direction, and has an inverted trapezoidal shape so that the front side is wide and the rear side is narrow. Is formed. The trapezoidal convex portion 243 is a convex portion formed between the inverted trapezoidal concave portions 241 arranged in the vehicle width direction, and is formed in a trapezoidal shape so that the front side is narrow and the rear side is wide. Yes. Then, as shown in FIGS. 5 and 7 (more specifically, FIG. 8), the ceiling portion of the trapezoidal convex portion 243 of the front end flange portion 240 is gently inclined so that the front side becomes higher, and the inclined portion 245 described above. It is configured to be continuous.

<About the structure of the joining portion between the dash panel 20 and the cowl panel 30>
As shown in FIG. 2, the front end flange portion 240 of the dash panel 20 is superimposed on the rear end flange portions 33f and 35f of the cowl panel 30 from above, and the inverted trapezoidal concave portion 241 of the front end flange portion 240 is provided. Are joined to the rear end flange portions 33f and 35f by spot welding or the like. Accordingly, as shown in FIG. 8 and the like, the front side of the dash panel 20 is gently inclined so that the front side becomes higher between the trapezoidal convex portion 243 of the front end flange portion 240 and the rear end flange portion 33f of the cowl panel 30. A gap S is formed. That is, as shown in FIG. 8, the gap S includes a front opening SP exposed on the cowl panel 30 (cowl upper panel 33) and a rear opening SE disposed below the front end flange portion 240 of the dash panel 20. And. The gap dimension of the gap S is configured to gradually decrease between the rear opening SE and the front opening SP. Further, as described above, the rear end edges of the rear end flange portions 33f, 35f of the cowl panel 30 are bent into a substantially Z shape to form the lower shelf portion 36. For this reason, in the rear of the rear opening SE of the gap S, an air passage portion T having an expanded passage shape is formed by the front end flange portion 240 of the dash panel 20 and the lower shelf portion 36 of the cowl panel 30. .

<About the function of the vehicle body structure according to this embodiment>
Next, the function of the vehicle body structure according to the present embodiment will be described with reference to FIGS. First, as shown in FIG. 4, the vehicle body 10 is immersed in the paint 52 of the paint reservoir 50 while moving forward and downward. At this time, as shown in FIG. 5, the air A tends to remain below the corners 23 of the dash panel 20 of the body 10. Next, the vehicle body 10 moves forward, and the body 10 is held in a substantially horizontal state as shown in FIG. Thereby, as shown in FIG. 7, the air A accumulated in the corner 23 of the dash panel 20 moves forward along the front shelf 24 that is inclined so that the front becomes higher. Then, the air A that has moved forward is an air reservoir provided on the lower shelf 36 of the cowl panel 30 along the inclined portion 245 of the front end flange 240 of the front shelf 24 as shown in FIG. Guided to part T. Further, the air A is blocked by the lower shelf portion 36 of the cowl panel 30 and does not enter the lower side of the front portion of the cowl panel 30. The air A accumulated in the air reservoir T receives buoyancy and enters the gap S from the rear opening SE, passes through the gap S, and escapes upward from the front opening SP. As a result, the air A is less likely to accumulate below the cowl panel 30 and the front shelf 24 of the dash panel 20. Thus, the lower surface of the front shelf portion 24 and the inclined portion 245 of the front end flange portion 240 corresponds to the inclined guide surface of the present invention. A sealer is applied to the front opening SP of the gap S after the electrodeposition coating process.

<Advantages of the vehicle body structure according to this embodiment>
According to the vehicle body structure of the present embodiment, as shown in FIG. 4, when the vehicle body 10 is immersed in the paint 52 of the paint reservoir 50, as shown in FIG. As shown in FIG. 6, the air A remaining in the corner 23 between the front shelf-like portion 24 and the vertical wall portion 22 of the side panel) changes its posture almost horizontally in the paint 52, as shown in FIG. 6. As shown in FIG. 8, the air is guided to the air reservoir T by being guided by the lower surfaces (inclined guide surfaces) of the front shelf 24 and the inclined portion 245 of the dash panel 20 by buoyancy. The air A accumulated in the air reservoir T is formed by a buoyancy between the rear end flange portions 33f and 35f of the cowl panel 30 (front panel) and the front end flange portion 240 of the dash panel 20 to form a gap. It comes out from S upward. For this reason, the air A that has entered the lower side of the dash panel 20 does not move to the lower side of the front portion of the cowl panel 30 and accumulate, thereby preventing poor coating due to air accumulation.

  Further, a gap S formed between the mating surfaces of both flange portions 33 f and 240 of the cowl panel 30 and the dash panel 20 is disposed on the front opening SP exposed on the cowl panel 30 and on the lower side of the dash panel 20. The rear opening SE is configured so that the gap size of the gap S gradually decreases between the rear opening SE and the front opening SP. For this reason, the air A accumulated in the air reservoir T is easily guided to the gap S. In addition, it is possible to minimize the gap size of the front opening SP of the gap S that can be seen from above the vehicle, and it is possible to prevent a later-stage sealer from flowing through the gap. Further, the air reservoir portion T is formed in a state like an expanded portion with respect to the rear opening SE of the gap S by bending the rear end edges of the rear end flange portions 33f and 35f of the cowl panel 30 downward in a shelf shape. Has been. For this reason, it becomes easy to collect air, and it can prevent that the air guide | induced forward passes the rear side opening SE.

<Example of change>
In addition, this invention is not limited to the said embodiment, The change in the range which does not deviate from the summary of this invention is possible. For example, in this embodiment, an example in which the inclination of the ceiling portion of the trapezoidal convex portion 243 is moderated with respect to the inclination of the inclined portion 245 formed in the front end flange portion 240 of the front shelf-like portion 24 of the dash panel 20 is shown. It was. However, the inclination of the ceiling portion of the trapezoidal convex portion 243 can be reduced by making the inclination of the rear end flange portions 33f, 35f of the cowl panel 30 closer to the inclination of the inclined portion 245 of the front end flange portion 240 of the dash panel 20. It is also possible to make it equal to the slope. Further, it is possible to make the inclination of the ceiling portion of the trapezoidal convex portion 243 equal to the inclination of the inclined portion 245 and the front shelf-like portion 24. Furthermore, the example which provides the air pocket part T by forming the lower shelf part 36 in the rear-end edge of the rear-end flange parts 33f and 35f of the cowl panel 30 was shown. However, it is also possible to provide the air reservoir T by folding the rear end edges of the rear end flange portions 33f and 35f downward and expanding the rear end edges.

10 .... Body 20 ...... Dash panel (rear panel)
22 ··· vertical wall portion 23 ··· corner 24 · · · front shelf-like portion (shelf-like portion, inclined guide surface)
240 ... front end flange part 245 ... inclined part (inclined guide surface)
30 ... Cowl panel (front panel)
33f ... rear end flange part 35f ... rear end flange part 36 ... lower shelf part 50 ... paint reservoir 52 ... paint S ... gap SE ... Rear opening SP ... Front opening T ... Air reservoir

Claims (3)

A vehicle body structure for immersing a vehicle body in paint in a paint reservoir and performing electrodeposition coating on the body,
Comprising the body, comprising a shelf-like front panel extending in the vehicle width direction, and a rear panel provided with a shelf-like portion extending in the vehicle width direction,
The front end flange portion of the rear panel shelf is overlapped with the rear end flange portion of the front panel from above, the flange portions are partially joined, and a gap is formed between the mating surfaces of both flange portions. Formed to penetrate in the direction,
On the lower side of the shelf-like portion of the rear panel, communicating with the gap between both flange portions, and further, an air reservoir is formed at a position lower than the gap,
In the shelf-like portion of the rear panel, an inclined guide surface is provided that guides air accumulated below the shelf-like portion to the air reservoir portion by buoyancy ,
The air reservoir portion is formed in a state like an expanded portion with respect to the rear opening of the gap by bending the edge of the rear flange portion of the front panel downward in a shelf shape. The vehicle body structure. A vehicle body structure according to claim 1,
A gap formed between the mating surfaces of both flange portions of the front panel and the shelf portion of the rear panel is a front opening exposed on the front panel and a rear side disposed below the rear panel. With an opening,
A vehicle body structure, wherein a gap size of a rear opening is set to be larger than a gap size of a front opening. A vehicle body structure according to claim 2,
A vehicle body structure characterized in that the gap size of the gap is configured to gradually decrease from a rear opening to a front opening.

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