JPH056451Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to an improvement in a sealing structure of mating surfaces that prevents water from entering from the outside into the overlapping parts of steel plates, which are structural parts of automobiles, etc.

BACKGROUND ART FIG. 3 shows the appearance of the overlapping portion of two steel plates of a quarter wheel house section of a conventional automobile, which is composed of a quarter panel A and a wheel house outer panel B shown by a dotted line. 4 and 5 are cross-sectional views showing an outline of the structure of the overlapping portion shown in FIG. 3, which is a first example of the conventional one, and shows the wheel house outer panel B and the wheel house inner panel C. The edges of the wheel house inner panel C are welded to the edge of the floor panel D, and the other end of the wheel house outer panel B is welded to the edge of the quarter panel A. A mating surface E, which is a sealing part, is formed by overlapping the parts, and a flange part F, which is an end of the mating surface E, is formed.
In this case, the two steel plates of panels A and B are overlapped and joined into an integral shape by spot welding, and a sealing structure is formed at the overlapped portion of the steel plates by filling the mating surface E with a sealing material F. has been done.

In the second example shown in FIG. 6, the flange portion H at the end of the wheel house outer panel B is bent downward at a right angle to form a flange portion I, and a sealing material K is placed at the corner of the flange portion H. Those with a filled seal structure are shown in FIGS.
As shown in Publication No. 79065, the end of the flange surface L, which is the end of the mating surface of the foil house outer panel B and the quarter panel A, which are two superimposed steel plates, is shown in FIG. 7 in the third example. As shown, at least one of the upper and lower sides is bent outward to form an expanded portion M, and the expanded portion M is filled with a sealing material N, which is the fourth example. As shown in FIG. 8, the end of the flange surface L is bent outward at both the top and bottom to form an expanded portion O, and the expanded portion O is filled with a sealing material N. It is being

Problems to be Solved by the Invention In the above-mentioned first example, as shown in FIG. Because of this, the sealing material G could not be visually observed when assembled as a vehicle, making it impossible to confirm the quality of the seal.

In addition, in the second example, as shown in FIG.
Since the flange portion H of the terminal is bent downward, when a wide tire is mounted, the flange portion H interferes with the tire, resulting in a problem such as cracking of the deformed seal portion.

Further, in the third and fourth examples, as shown in FIGS. 7 and 8, the flange surfaces L are joined by spot welding, but the panels A and B of the two panels are connected by spot welding.
1 or 2 between the two superimposed steel plates
Since there is a gap of approximately 1.0 mm, rust may develop on the steel plate due to salt water, muddy water, etc. that entered through the small gap between the sealing material N and the expanded parts M and O during use. may occur, and the enlarged portions M, O
The disadvantage was that processing costs could not be reduced because of the formation of .

Furthermore, if the flange surface F shown in FIG. 5 is filled with a high-magnification foam material, it will foam at the baking temperature of the coating furnace and will protrude beyond the edge of the flange surface F. Ta.

Therefore, in view of the current state of the structure described above, the present invention provides a high-magnification foam type sealant and a low-magnification foam type sealant between the joining parts of steel plates that are structural parts of automobiles, etc., and between the end spot welding flange surfaces. By joining and filling a type of sealant, it is possible to prevent water from entering the joint portion and the flange surface from the outside, and the sealant is filled between the mating surfaces of the steel plates. Depending on the material, it is expected that the rust prevention ability will improve.
In addition, the foam sealant does not protrude, and there is no need to bend the end portion of the flange surface outward to form an expanded portion, reducing the number of processing steps, and the end flange portion does not interfere with the tire. This was devised for the purpose of providing a sealing structure for mating surfaces of steel plates that can be shaped to improve usability.

Means for Solving the Problems As stated in the claims of the utility model registration, the present invention provides a structure in which the mating surface of two steel plates that are overlapped and the flange surface that is the end of the mating portion is The mating portion is filled with a foam sealant, and the flange surface is filled with a low-magnification foam sealant having a foaming ratio lower than that of the foam sealant. Due to the structure in which the sealant is filled in close contact with the flange surface, even if the sealant is filled between the overlapping surfaces of two steel plates, the sealant will not protrude from the edge of the flange surface and will not leak out from the edge. In addition to preventing the intrusion of water, etc., the sealing material filled in the small space between the flange surfaces seals the mating surfaces of the two steel plates over a wide area, improving the rust prevention ability of the inner surface of the steel plates. It was designed so that it could be carried out.

Embodiment and operation FIGS. 1 and 2 are schematic cross-sectional views of a quarter wheel house portion of an automobile showing an embodiment of the sealing structure of the steel plate mating surfaces of the present invention, in which the quarter panel 1 and the wheel house outer panel 2 are separated. This is an example of application to a structural part of a mating part 3 formed of two steel plates and a flange surface 4 which is an end bent from the mating part 3, as shown in Fig. 2. A flange 7 having a depth sufficient to allow the end of the quarter panel 1 to be bent and used as a sealing shelf is formed, and the quarter panel 1
A high-magnification foam sealing material 5 before foaming is inserted inside the steel plate of the end portion 10 forming the joint portion 3, and a low-magnification foaming sealing material 6, also before foaming, is inserted into the seal shelf serving as the flange 7. The sealing material 6 is arranged so that one end thereof is in close contact with the end surface of the sealing material 5.

In the embodiment in which both of the unfoamed sealants 5 and 6 are disposed on the quarter panel 1 as described above, the end 9 of the foil house outer panel 2 is connected to the end 10 as shown in FIG.
The unfoamed high-magnification foam material is sandwiched between the ends 9 and 10 to form a mating part 3, and the ends 9 and 10 are arranged facing each other.
is bent to form a flange 8, and the flange 8 and the flange 7 are overlapped and joined by spot welding with the unfoamed sealant 6 in between, thereby forming a sealing shelf serving as the sealing surface 4. ing.

After the quarter wheel house part is assembled with the above-mentioned configuration in which both the unfoamed foam materials 5 and 6 are inserted inside the two steel plates of the quarter panel 1 and the wheel house outer panel 2, In the baking painting process of both panels 1 and 2, the sealants 5 and 6 are foamed at the joint portion 3 and the flange surface 4, respectively, at the baking temperature of the coating furnace, so that the gaps between the respective portions are completely filled. Both sealing materials 5 and 6 are sealed.
Since the foaming ratio is different from that of the above-mentioned high-magnification foam sealant 5, even if the high-magnification foam sealant is foamed, it will not protrude outward from the flange surface 4 as it will be blocked by the low-magnification foam sealant 5. and 6 are brought into close contact with each other, and the mating surfaces of the two steel plates are immediately and completely foam-filled and sealed, and the sealed state of the flange surface 4 can be visually observed.

Effects The present invention has the configuration and operation described above, and bends the ends of the overlapping surfaces of two steel plates, and allows the overlapping surfaces to remain in the form without forming a special shaped sealing part. The high-magnification foam sealant and low-magnification foam sealant inserted into the overlapping surfaces of the mating part and the flange surface are foamed to completely fill and seal the mating part for a short period of time. Since the foaming range of the high magnification foam sealant is regulated by the presence of the low magnification foam sealant on the flange surface,
The high-magnification foam sealant does not protrude from the ends of the overlapping surfaces, and the end portions can be quickly filled and sealed, thereby preventing infiltration of water, etc. from the edges of the end portions of the overlapping surfaces. In addition, the sealing material is foamed and filled into a small space between the overlapping surfaces, completely sealing a wide area, which improves the rust prevention ability of the inner surface of the steel plate. This will produce the desired effect.

[Brief explanation of drawings]

Fig. 1 is a schematic longitudinal cross-sectional view showing the sealing structure of the mating surfaces of steel plates according to an embodiment of the present invention, and Fig. The figure is a schematic cross-sectional view showing a state in which a foamed sealant before foaming is provided on the overlapping surfaces of the structure shown in FIG. 1, and FIG. 3 shows a conventional sealing structure for the overlapping surfaces of steel plates. A schematic external view showing an outline of the sealing structure of a quarter wheel house portion of an automobile. Fig. 4 is a schematic cross-sectional view taken along the line - - of the sealing structure shown in Fig. 3. Fig. 5 is a schematic cross-sectional view of the sealing structure of the quarter wheel house portion of an automobile.
FIG. 6 is a schematic cross-sectional view showing a second example of the conventional structure, and FIG. 7 is a schematic cross-sectional view showing the third example of the conventional structure. 8 are schematic cross-sectional views showing a fourth example of the conventional device. 3... mating surface, 4... flange surface, 5... high magnification foam sealant, 6... low magnification foam sealant.

Claims (1)

[Scope of utility model registration request] The mating surface of the steel plate between the joining part of the two superimposed steel plates and the flange surface which is the end of the joining part is formed with sufficient depth for sealing, and the joining part is filled with a foam sealant. A sealing structure for mating surfaces of steel plates, characterized in that the flange surface is filled with a sealant having a lower expansion ratio than the foam sealant in close contact with the sealant.