JP2000108670A - Body panel for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide sufficient rigidity and strength even with a lightweight structure and suppress the rusting by forming a bead part in the overlapping part of an outer panel and an inner panel on at least one of both the panels to partially form a clearance between both the panels. SOLUTION: A back door panel is provided with a body part 20 consisting of an inner panel 3 for forming the inner surface part and an outer panel 4 overlapped and fixed thereto to form the outer surface part, and a rear glass 5 added thereto. A plurality of bead parts 32, 33 curved inward is formed in the overlapping part of the inner panel 3. Clearances (g) are formed between the inner panel 3 and the outer panel 4 by the bead parts 32, 33, and each clearance (g) is opened to the outside. Since the bead parts 32, 33 are formed in the corner part and the mounting part of a spoiler 7, sufficient strength can be provided, and a coating material can be penetrated to the overlapping part of both the panels 3, 4 to suppress the rusting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure around a hemming portion in a body panel of an automobile, for example, an inner panel such as a back door panel forming a rear portion of the automobile and an outer panel.

[0002]

2. Description of the Related Art In a wagon or one-box type automobile, a rear body portion of a vehicle body b is constituted by a back door panel p which can be freely opened and closed as shown in FIG. The main body part p0 is formed by two panels, an inner panel p1 and an outer panel p2.
The p2s are superimposed on each other at the peripheral portions and are fixed (see FIGS. 14 and 15). In addition, on the outer surface of the outer panel P2, FIG.
As shown in FIGS. 16 to 18, a spoiler s for optimizing the flow of air to the rear of the vehicle body during traveling is provided. This spoiler s
1, bolts bl are inserted into through holes h formed in p2,
It is screwed to a nut n embedded in the spoiler s and fastened and fixed to the outer surface of the spoiler s.

On the other hand, as shown in FIGS. 17 to 19, the outer edge of the outer panel p2 is bent in a U-shape along the outer edge of the inner panel p1, and overlaps the inner surface of the inner panel p1. The so-called hemming part p21 formed
Are formed. The edge of the hemmed portion p21 is sealed with a sealant k as shown by a dashed line in FIG.
It is customary to cover with 1 to prevent the occurrence of rust.

[0004]

However, in the above-mentioned prior art, since both the inner panel p1 and the outer panel p2 have a flat shape at their overlapping portion, the strength and rigidity required for both portions are required. In order to obtain the thickness, it is necessary to set a plate thickness in accordance with the required strength and rigidity, and there is a problem that the weight of both panels p1 and p2 increases and the panels become expensive. In particular, when the rear spoiler s is fastened and fixed to both panels p1 and p2 as described above, the above-mentioned problem is more remarkable because the fastening portion of the spoiler s requires sufficient strength and rigidity. It becomes something.

In order to apply the sealing agent k1, as shown in FIGS. 14 and 15, an operator has a stick-shaped sealer gun k, and the peripheral surface of the sealing agent discharge portion is hemmed. The sealant k1 is applied along the edge of the hemmed portion p21 by moving the guide to the edge of the portion p21 and moving it as a guide. However, both panels p1 and p2 have a sealant k1.
In some cases, a step r as shown in FIGS. 14 to 17 may be formed in the path to which the sealing agent k1 is applied, and when the sealant k1 is applied to the step r, the sealer gun shown in FIG. The ejection portion of k may be disengaged from the edge of the hemming portion p21 and lose the guide, and the sealing agent k1 may be applied to an inappropriate position as shown in FIG. There is a problem that workability and productivity are reduced. Furthermore, both panels p1, p
2 is in a close contact state, so that the paint does not easily adhere to the overlapped portions of the panels p1 and p2 during electrodeposition coating, and rust may be generated in the overlapped portions of the panels p1 and p2. There was also.

The present invention has been made in view of the above-mentioned problems of the prior art, and obtains sufficient rigidity and strength of a main body composed of an inner panel and an outer panel by a lightweight structure without increasing its thickness. It is an object of the present invention to provide a vehicle body panel capable of suppressing the generation of rust while being capable of suppressing the occurrence of rust.

[0007]

The present invention has the following arrangement to solve the above-mentioned problems. That is, claim 1 of the present application
The invention described in a vehicle body panel provided with a main body having an outer panel forming an outer surface of a vehicle body of an automobile and an inner panel overlapped and fixed to a peripheral inner surface of the outer panel, wherein the outer panel and the inner panel are provided. In at least one of the panels, a bead portion is formed at the overlapping portion of both panels, and a gap is partially formed between both panels.

[0008] The invention according to claim 2 of the present application provides a bead portion,
It is formed between the vicinity of the upper corner of the back door panel main body and a fixing member insertion hole for fixing the spoiler. According to a third aspect of the present invention, a bead portion is formed on the inner panel.

According to a fourth aspect of the present invention, a hemming portion that bends toward the inner surface along the outer edge of the inner panel is formed on a peripheral edge of the outer panel, and a seal is provided on an edge of the hemming portion. While the agent is applied along a linear application path, a convex portion is formed at a predetermined position on the side of the application path of the sealing agent. Further, in the invention according to claim 5 of the present application, the convex portion is formed on a side of a step portion formed in the application path. In the invention according to claim 6 of the present application, the main body constitutes a back door panel of an automobile.

[0010] In the first aspect of the present invention having the above structure, at least one of the inner panel and the outer panel is provided with a bead portion, so that the rigidity and strength of each panel are increased, and the thickness of each panel is increased. Need not be increased. For this reason, the weight of each panel does not increase, and the configuration can be made at low cost. In the case where a spoiler is provided, if the spoiler is provided between the insertion holes of the mounting member of the spoiler, the strength of the mounting portion of the spoiler can be increased. If a bead is provided in a corner portion of the panel main body, the strength and rigidity can be further increased.

Also, as in the invention described in claim 3 of the present application,
By forming the bead portion on the inner panel, the bead portion does not impair the appearance of the vehicle body panel. Furthermore, according to the invention as set forth in claim 4 of the present application, since the convex portion is formed on the side of the application path of the sealant, when performing the application operation by the sealer gun, the application portion of the sealer gun is held only by the edge of the hemming portion. In addition, since the protrusion formed along the edge can also be used as a guide for the sealer gun, even if the coating portion of the sealer gun comes off the edge of the hemming portion, the sealer gun is applied using the protrusion as a guide. The sealant can be reliably applied along the application path. In particular, claim 5 of the present application
As in the described invention, when a step is formed in the application path of the sealant, the sealer gun often comes off the edge of the hemming part at the step, but in this case, the protrusion is formed. The coating operation can be properly performed as a guide. The invention described in each of the above claims is applicable, for example, when a back door panel is configured as in the invention described in claim 6 of the present application.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a vehicle body panel 2 shown in this embodiment is a back door panel that forms a rear surface portion of a vehicle body 1B in a one-box type automobile 1, and is vertically mounted on a rear upper portion of the vehicle body 1B by a hinge (not shown). It can be opened and closed freely. The back door panel 2 includes an inner panel 3 (see FIG. 2) that forms an inner surface thereof, and an outer panel 4 (see FIG. 3) that is fixed to the inner panel 3 and forms an outer surface of the back door panel 2. The main body 20 is provided, and the rear glass 5 and a weather strip are added thereto.

As shown in FIG. 2, the inner panel 3
Is formed with a window frame portion 3a and, at the periphery, a superimposed portion 31 that overlaps with the outer panel 4, and the upper side edges 12 of the superimposed portion 31 are formed as shown in FIGS. A bolt insertion hole 31a (fixing member insertion hole) through which a bolt (fixing member) 6 for fixing the spoiler 7 is inserted is formed. Here, the bolt insertion holes 31a,
31a are formed.

The outer panel 4 has an outer edge shape corresponding to the inner panel 3 and has a window frame 4a that matches the window frame 3a of the inner panel 3. At the periphery of the outer panel 4, there is formed a superposed portion 41 that superimposes on the superposed portion 31 of the inner panel 3, and wraps the outer edge of the inner panel 3 as shown in FIGS. 8 and 9. A hemming portion 43 is formed to be bent in a U-shape from the outer surface side to the inner surface side, and the two panels 3 and 4 can be joined and fixed by the hemming portion 43. The sealing agent 8 is applied to a linear application path (indicated by a dashed line in FIG. 10) set along the edge of the hemming portion 43. The generation of rust on the portion 43 can be prevented. In addition, the overlapping portions 31 of the panels 3 and 4 have stepped portions 31c recessed inward from the mounting portions 31b and 41b for attaching the spoilers.
41c is formed, and the edge of the rear glass 5 is fitted into the steps 31c, 41c.

Further, at the peripheral edge of the outer panel 4, there is formed an overlap portion 41 which overlaps with the overlap portion of the inner panel 3. The overlap portion 41 has bolt insertion holes 31 a, 31 a of the inner panel 3. Two bolt insertion holes 41a, 41a are formed at matching positions. And
A bolt 6 is inserted from the inner panel 3 side into the bolt insertion holes 31a and 41a of the panels 3 and 4, and the bolt 6 is positioned on the outer surface of the outer panel 4 as shown in FIGS. The spoiler 7 is fastened and fixed by screwing it to a nut 71 embedded in the spoiler. In FIG. 8, reference numeral 72 denotes a locking projection protruding from the bottom of the spoiler 7, which is adapted to elastically fit with the elastic member 42 embedded in the outer panel 4, thereby stabilizing the spoiler 7. And the fixing strength is increased.

The overlapping portion 31 of the inner panel 3
Are formed with a plurality of bead portions 32 and 33 that curve inward. In this embodiment, as shown in FIGS. 6, 7 and 9, a pair of upper and lower bolt insertion holes 31 a and 41 are formed at both upper ends of the inner panel 3.
A bead portion 32 is formed between a, and a bead portion 33 is formed at a corner portion. Due to the bead portions 32 and 33, a space between the inner panel 3 and the outer panel 4 is provided.
As shown in FIG. 7, gaps g are formed, and each gap g is open to the outside. Further, the inner panel 3 is formed with a convex portion 34 protruding upward along the side of the application path of the sealant 8. In this embodiment, FIG.
As shown in FIG. 7, in the application path of the sealant 8, the protrusion 34 is formed to extend downward from the stepped portions 31c and 41c. The edge is opposed to the edge with a distance interval slightly larger than the outer diameter of the rod-shaped sealer gun 10 for discharging the sealant 8, and extends downward.

In the back door panel 2 of this embodiment configured as described above, the inner panel 3
Since the bead portions 32 and 33 are formed in the overlapping portion 31, the strength and rigidity thereof are greatly increased as compared with the conventional inner panel p1 having a flat shape. For this reason, it is not necessary to increase the wall thickness in order to secure the required strength and rigidity, and it is possible to reduce the cost without increasing the weight. In particular, in this embodiment, since the bead portions 32 and 33 are formed in the corner portions requiring high strength and the mounting portions 31b and 41b of the spoiler 7, sufficient strength can be obtained. Further, since an opening is formed between the inner panel 3 and the outer panel 4 at the position where the bead portions 32 and 33 are formed, when the electrodeposition coating is performed on the main body 20, the paint is In order to penetrate inward from the opening, the overlapping portions 31 and 4 of both panels 3 and 4 are provided.
1 can penetrate the paint, and the generation of rust on both panels 3 and 4 can be suppressed.

Moreover, in this embodiment, since the sealing agent 8 can be applied to the hemming portion 43 of the back door panel 2 more reliably, a better rust prevention effect can be obtained. That is, the application of the sealant 8 is performed in a state where the back door panel 2 is attached to the rear part of the vehicle body of the automobile, as in the above-described conventional technique. At the same time as the discharge of 8, the outer peripheral surface of the sealer gun 10 is moved while being applied to the edge of the hemming portion 43. Thereby, the sealant 8 can be surely applied along the application path.

Further, the rear glass 5 is provided in the coating path.
Since the steps 31c and 41c are formed to fit the seals, there is a high possibility that the sealer gun 10 comes off the edge of the hemming part 43 when passing through the steps 31c and 41c. However, in this embodiment, the back door panel 2 is connected to the steps 31c and 41c.
The convex portion 34 is formed to extend downward (toward the front in the work traveling direction), so that the side surface 3 of the convex portion 34 is formed.
Since the sealer gun 10 can be moved along the coating path by applying the coating part peripheral surface of the sealer gun 10 to 4a, as shown in FIG. 11 and FIG. In addition, the coating operation can be easily performed, and workability and productivity are greatly improved. For example, a thermosetting resin or the like is used as the sealant 8, and after the application operation, the operation is completed by applying heat to the uncured sealant to cure the sealant.

In the above-described embodiment, the beads 32, 33 are formed on the inner panel 3 of the outer panel 4 and the inner panel 3 constituting the main body 20 of the back door panel 2. Although it is not exposed on the outer surface of the back door panel 2 and the smooth outer surface shape of the main body 20 is not impaired, from the viewpoint of securing the rigidity and strength of the back door panel 2, the bead portion is connected to the outer panel 4. May be formed,
Depending on the case, it may be formed on both panels 3 and 4. In this case, if the bead portions 32 and 33 are formed in a concealed portion, for example, formed in a mounting portion of the rear spoiler 7, the appearance is not impaired. Further, the shapes, formation positions, and the like of the bead portions 32 and 33 are not limited to the above embodiment, and can be appropriately changed as needed.

Further, in the above embodiment, the case where the present invention is applied to a back door panel of an automobile has been described as an example. However, the present invention forms an outer surface of a vehicle body such as a front hood and a side door of an automobile. If there is, it can be applied to other parts, and is not particularly limited to the back door panel.

[0022]

As described above, according to the first aspect of the present invention, since the bead portion is formed on at least one of the inner panel and the outer panel, the rigidity and strength can be increased without increasing the thickness of each panel. Can be. For this reason, each panel can be configured to be lightweight and can be configured at low cost. In addition, since a gap is formed between both panels by forming a bead portion, the paint can be allowed to enter between the overlapping portions of both panels in electrodeposition coating or the like, and the paint is reliably applied. be able to. When a spoiler is provided, the strength of the spoiler mounting portion can be increased by providing a bead portion between the insertion holes of the spoiler mounting member, as in the invention according to claim 2 of the present application.
By providing a bead portion at a corner portion of the main body of the back door panel, strength and rigidity can be further increased.

Also, as in the invention described in claim 3 of the present application,
If the bead portion is formed on the inner panel, the bead portion does not impair the appearance of the back door panel. Furthermore, according to the invention as set forth in claim 4 of the present application, since the convex portion is formed on the side of the application path of the sealant, when performing the application operation by the sealer gun, the discharge portion of the sealer gun is held only by the edge of the hemming portion. In addition, since the convex portion formed along the edge can also be used as a guide, even if the application portion of the sealer gun deviates from the edge of the hemming portion, the application portion of the sealer gun can be used as a guide. The sealant can be moved, and the sealant can be reliably applied along the application path. In particular, as in the invention according to claim 5 of the present application, when a step portion is formed in the application path of the sealant, the sealer gun often comes off the edge of the hemming portion at the step portion. If a convex portion is formed on the side of the step, the coating operation can be properly performed using the convex portion as a guide.

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view showing a rear portion of an automobile according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an inner panel of the back door panel shown in FIG.

FIG. 3 is a partially cutaway perspective view showing an outer panel of the back door panel shown in FIG. 1;

FIG. 4 is an explanatory enlarged perspective view of a portion W in FIG. 1;

FIG. 5 is an explanatory perspective view showing a state where a rear spoiler in the apparatus shown in FIG. 4 is removed.

6 is an explanatory perspective view showing an outer surface side of the inner panel shown in FIG.

FIG. 7 is a sectional view taken along line XX in FIGS. 4 and 5;

FIG. 8 is a sectional view taken along the line YY in FIGS. 4 and 5;

FIG. 9 is a sectional view taken along the line ZZ in FIGS. 4 and 5;

FIG. 10 is an explanatory enlarged perspective view showing a projection in FIG. 6 from the inner surface side.

FIG. 11 is a sectional view taken along line UU in FIG. 10;

FIG. 12 is a sectional view taken along line TT in FIG. 10;

FIG. 13 is an explanatory perspective view showing a rear portion of an automobile according to a conventional embodiment.

FIG. 14 is an explanatory perspective view showing the operation of applying the sealant to the back door panel shown in FIG.

FIG. 15 is an explanatory vertical sectional side view of the back door panel.

16 is an explanatory enlarged perspective view of a part B shown in FIG.

FIG. 17 is a sectional view taken along line DD of FIG.

FIG. 18 is a sectional view taken along line EE of FIG.

19A and 19B are explanatory perspective views showing a conventional sealant application state, in which FIG. 19A shows an appropriate application state, and FIG. 19B shows an inappropriate application state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automobile 1B Car body 2 Back door panel (body panel) 3 Inner panel 4 Outer panel 7 Spoiler 8 Sealant 20 Main body part 31, 41 Overlapping part 31a, 41a Bolt insertion hole (fixing member insertion hole) 32, 33 Bead part 34 Convex part 41c Step 43 Hemming g Gap

Claims (6)

[Claims] 1. An automobile body panel comprising a main body having an outer panel forming an outer surface of a vehicle body of an automobile and an inner panel overlapped and fixed to a peripheral inner surface of the outer panel, wherein the outer panel and the inner panel are provided. A vehicle body panel, wherein a bead portion is formed in at least one of the overlapping portions of the two panels, and a gap is partially formed between the two panels. 2. The vehicle body panel according to claim 1, wherein the bead portion is formed between the vicinity of the upper corner portion of the main body portion and a fixing member insertion hole for fixing the spoiler. 3. The vehicle body panel according to claim 1, wherein a bead portion is formed on the inner panel. 4. A hemming portion is formed on the outer panel along the outer edge of the inner panel toward the inner surface, and a sealing agent is applied to the edge of the hemming portion along a linear application path. The vehicle body panel according to any one of claims 1 to 3, wherein a convex portion is formed at a predetermined position on a side of the application path of the sealant while applying the sealant. 5. The vehicle body panel according to claim 4, wherein the projection is formed on a side of a step formed in the application path. 6. The vehicle according to claim 1, wherein the main body constitutes a back door panel of the automobile.
The vehicle body panel according to any of the above.