JPS60216939A - Production of wall facing material - Google Patents

Abstract

PURPOSE:To produce simply and yet easily a wall facing material having no unevenness in thickness nor reduction in intensity by bending the end edge of a metallic sheet and bending in a circular arc the tongue pieces of four corners after providing notches in a circular arc shape at the four corners of a square- shaped metallic sheet and removing the angled parts. CONSTITUTION:Circular arc-shaped notches 12 bending toward a point end part 11 is provided at the four corners of a square-shaped metallic sheet 10 and also an angled part 13 of the outside thereof is cut and removed. An edge end of the metallic sheet 10 is then bent at right angles on a broken line 14 which is positioned slightly inner side from a line connecting an end part 12a, 12b of the adjacent notches of cut 12, 12 and which are nearly equivalent to the distance between said notches 12a, 12b in its length and a side wall 15 is formed and if necessary, a flange part 19 is formed by bending. Then after providing a notch 18 to a tongue piece 16 formed along the grain depth of cut 12 preferably the tongue piece 16 is bent in the same direction as the side wall 15 along a circular arc shaped broken line 17 connecting the end part of the above broken line 14 and a wall facing body for wall face finishing having the side wall 15 around the basic body is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing wall materials used for finishing walls of buildings.

As this type of wall material, for example, as shown in FIG. 1, there is known a rectangular dish-shaped wall material having a side wall 2 integrally provided around a base 1. Conventionally, such wall materials have been formed by drawing a rectangular metal plate, but this process has the following drawbacks.

a It is very difficult to squeeze the corners and tends to cause uneven wall thickness and paper strength, making it difficult to obtain a stable product.

b. Because it is difficult to draw the side walls deeply, it is difficult to obtain wall materials with high side walls.

A large force acts intensively on the C drawing area, which tends to cause distortions and scratches, making it impossible to use a metal plate whose surface has been treated in advance.

Because it is necessary to use a mold, the manufacturing process becomes large-scale, and it is only possible to obtain products with specific dimensions that match the mold.

It is an object of the present invention to make it possible to manufacture such a wall material by a simple process mainly consisting of bending, without using a large-scale drawing process using a mold.

In order to achieve such an object, the method of the present invention provides arc-shaped notches that curve toward the tip at the four corners of a rectangular metal plate, and also provides a portion of the metal plate located outside the notch at the corner of the metal plate. and a step of bending the edge of the metal plate on a fold line that is located slightly inside the line connecting the ends of adjacent cuts and whose length is approximately the same as the distance between the ends. and a step of bending the tongue pieces formed at the four corners of the metal plate along the compound cuts along arc-shaped fold lines connecting the ends of adjacent vertical and horizontal fold lines.

According to the method of the present invention, the following effects can be expected.

A. Since the bending process is the main process and no large-scale drawing process is required, the process is very easy and a stable product without uneven thickness or loss of strength can be obtained.

B. No mold or large-scale processing equipment is required.

Since a large force is not applied to the C2 bent portion and no distortion occurs, there is little risk of damage even if a metal plate whose surface has been previously treated is used.

D. Since there are no restrictions on processing dimensions due to molds, wall materials of any desired size can be obtained.

Hereinafter, the method of the present invention will be explained in detail with reference to the drawings.

In manufacturing the wall material, first, a rectangular metal plate made of any material such as iron, aluminum, or stainless steel is prepared, and this metal plate is cut as shown in FIG. 2 by press working or the like. That is, arc-shaped cuts 12 are provided at the four corners of the metal plate IO, and the cuts 12 are curved toward the tip 11.
The corner portion 13 of the metal plate IO located outside the notch 12 is cut off.

] The two-component metal plate 10 may be previously subjected to a surface treatment such as plating, painting, or vinyl coating.

Next, the edge of the metal plate 10 is cut into adjacent notches 12.
12 at a right angle on a fold line 14 that is located slightly inside the line connecting the ends 12a and 12b and whose length is approximately the same as the distance between the ends 12a and 12b.
A side wall 15 is formed as shown in the figure. This bending work can be performed using a machine such as a bender, and the grooves on the metal plate 10 after bending are such that the arcuate tongue pieces 16 formed along the notches 12 at the four corners are not bent. It will remain in its current state.

Next, the tongue piece 16 is attached to the adjacent vertical and horizontal fold lines 14.
．． It is bent in the same direction as the side wall 15 along the arc-shaped folding line 17 connecting the ends of the 1' 4, thereby finishing the corner as shown in FIG. The bending of this tongue IB is
This can be done by a simple drawing process.At this time, if an appropriate number of notches 18 are cut in the edge of the tongue lB as shown by chain lines in FIG. It can absorb the shrinkage of edges and can be easily processed, especially
The method of providing the notch 18 in this way is effective when the drawing ratio of the tongue piece I6 becomes thicker by increasing the height of the side wall 15.

When the bending of the tongue piece [8] is completed, the tip of the side wall 15 is bent outward at a right angle to form a flange portion 18.

This flange portion 18 may be provided as necessary, and its bending can be performed simultaneously with the bending of the blending side wall 15.

In this way, a wall member as shown in FIG. 5 can be obtained.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional wall member, Figs. 2 to 4 are for explaining the present invention in detail; Fig. 2 is a front view of a cut metal plate, Figs. FIG. 4 is a partial perspective view of an intermediate bent shape, and FIG. 5 is a perspective view of a wall material obtained by the method of the present invention. lO...metal plate, 11...tip, 12, notch, +2a, 12b * fist end, 13
... corner, 14.17 ... fold line, 16 ... tongue piece. Patent applicant Oshio 9 bubbles, 2

Claims (1)

[Scope of Claims] 1. A step of providing arc-shaped cuts curving toward the tip at the four corners of a rectangular metal plate, and cutting off a portion of the corner of the metal plate located outside of the cuts. , a step of bending the edge of the metal plate on a folding line that is located slightly inside the line connecting the ends of adjacent cuts and whose length is approximately the same as the distance between the ends; A method for manufacturing a wall material, comprising the steps of: bending tongue pieces formed at the four corners of a metal plate along arc-shaped fold lines connecting the ends of adjacent vertical and horizontal fold lines.