JPH0439927Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to the improvement of metal panels such as enamel panels used for the interior and exterior of buildings.

(Prior Art) Metal panels such as enamel panels usually have bent sides bent at 90 degrees around the main plate surface. However, as shown in Figures 1 and 3, if the corner part has a shape with a right-angled notch, it is geometrically impossible to make the bent sides of the inside corner fit perfectly. It is. For this reason, conventionally, as shown in FIG.
1, 22, 23, 24, etc., and bend it as shown in Figure 3. Separately punched rectangular cover plate 25
was attached by welding. However, in this case, it is necessary to weld three sides of the cover plate 25, so welding takes time, and the main plate surface 20 is distorted by welding heat, resulting in poor appearance.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and can easily and reliably close the opening formed between the bent sides of the inside corner. Moreover, it was completed with the aim of creating a metal panel that would prevent distortion of the main plate surface due to welding heat.

(Means for Solving the Problem) The present invention has the edges of the two bent sides forming the inner corner of a metal panel having a bent side on the outer periphery coincident in the unfolded state and in the folded state. It is characterized by having inclined edges having an angle of 45°, and an opening formed between these inclined edges being sealed with an L-shaped backing plate.

(Embodiment) Next, the present invention will be explained in detail with reference to the embodiment shown in Figs. This is the formed bent side. Among these bent sides, the edges of two adjacent bent sides 3 and 4 forming the inner corner of the cutout portion of the metal panel are inclined edges 6 and 7. These inclined edges 6,
7 coincides with the bisector toward the apex 8 of the corner part in the state of the developed view shown in FIG. 2, and hangs down from the apex 8 in the state of bending as shown in FIG. 45° to perpendicular 9
It forms an angle of . When these bent sides 3 and 4 are bent, an L-shaped backing plate 10 is inserted from the back side into the opening formed between the inclined edges 6 and 7.
is assigned. The backing plate 10 is preferably made of the same material as the metal panel, and as shown in FIG. 1, it is continuously welded to the inclined edges 6 and 7 at the corners near the apex 8, but at the lower part. is fixed only by spot welding. The opening at the inner corner is sealed by such a backing plate 10.

(Function) As shown in FIG.
3, 4, and 5 around the main plate surface 1, and by welding an L-shaped backing plate 10 to the opening formed between the inclined edges 6 and 7 of the bent sides 3 and 4. It uses a backing plate 10 that is bent at right angles in advance and can reduce the number of welding points, so it is easier to manufacture than the conventional metal panel shown in FIG. It's easy.
In addition, since there is no need to perform continuous welding on three sides as in conventional methods, the main plate surface 1 is not distorted by welding heat, resulting in a metal panel with an extremely good appearance, making it suitable for use in the interior and exterior of buildings. Become.

(Effect of the invention) As is clear from the above explanation, the invention has a structure in which the opening formed between the bent sides of the inside corner is sealed with an L-shaped backing plate. This brings about advantages such as ease of manufacture and prevention of thermal distortion of the main plate surface due to welding heat. Therefore, the present invention has extremely great practical value as a metal panel that eliminates the problems of the conventional metal panel.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention, FIG. 2 is a developed view thereof, FIG. 3 is a perspective view showing a conventional example, and FIG. 4 is a developed view thereof. 2, 3, 4, 5...bent side, 6,7...slanted edge, 10...backing plate.

Claims (1)

[Scope of utility model registration request] The edges of the two bent sides 3 and 4 forming the inner corner of a metal panel having bent sides 2, 3, 4 and 5 on the outer periphery are aligned at 45° in the unfolded state and are bent at an angle of 45°. A metal panel characterized in that it has angled inclined edges 6 and 7, and an opening formed between these inclined edges 6 and 7 is sealed with an L-shaped backing plate 10.