JPH0234259B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing a wall material used for finishing walls of buildings and the like.

[Prior Art] As this type of wall material, for example, as shown in FIG. 1, there is known a rectangular dish-shaped wall material having a base body 1 and a side wall 2 integrally provided around the periphery. This kind of wall material is
Conventionally, rectangular metal plates have been formed by drawing, but this process has had the following drawbacks.

(a) The metal plate will shrink at the corner of the side wall, and there will be a difference in shrinkage in the height direction of the side wall, making narrowing it down very difficult.
It is difficult to obtain wall materials for high side walls. Moreover, it is difficult to obtain a stable product because it tends to cause unevenness in wall thickness and a decrease in strength due to shrinkage.

(b) A large force acts concentratedly on the drawing part, which tends to cause distortions and scratches, making it impossible to use a metal plate whose surface has been treated in advance.

(c) Since it is necessary to use a mold, the processing equipment becomes large-scale, and it is only possible to obtain products with specific dimensions that fit the mold.

[Problems to be Solved by the Invention] The purpose of the present invention is to absorb the shrinkage of the metal plate at the corner portions, thereby making it possible to manufacture wall materials with high side walls by simple bending. It is something to do.

[Means for solving the problems] In order to achieve this objective, the method of the present invention includes the following steps:
The four corners of a rectangular metal plate are cut out in an arc shape, and an appropriate number of cuts with a depth of less than half the height of the side wall are made on the curved edges of the arc at the four corners, and adjacent By cutting a hole in the middle of the cut, bending the four sides of the metal plate with these cuts and holes to a certain height, and bending the four corners into an arc, This method is characterized in that a predetermined wall surface material is obtained while absorbing shrinkage due to bending of the metal plate in the cuts and holes.

[Effects of the Invention] According to the method of the present invention, the following effects can be expected.

(A) When bending the corner part of the wall material, the shrinkage of the metal plate is absorbed by the cuts and holes, and the difference in shrinkage in the height direction of the side wall is also absorbed and alleviated. It is very easy to bend and allows you to obtain a wall material with high side walls.

(B) If shrinkage is absorbed only by a notch on the curved edge, not only must the depth of the notch be equal to the height of the side wall, but also the width must be wide. Therefore, the side wall is divided into many small pieces at the corner portion, resulting in a decrease in strength. However, in the present invention, the strength decrease is prevented by making the depth of the cut less than half the height of the side wall. At the same time, shrinkage in the inner part of the side wall, which is difficult to absorb by reducing the depth of the cut, is absorbed by the holes provided in that part, so the side wall can be used on a wall surface with high height without reducing strength. material can be formed easily and reliably. Moreover, since the above-mentioned openings are formed in the part located between the adjacent notches inside the notch, the shrinkage can be evenly absorbed for the entire corner by these notches and the openings. can.

(C) Since the bending process is the main process and no large-scale drawing process is required, it is very easy to process and it is possible to obtain a stable product without uneven thickness or loss of strength.

(D) No mold or associated large-scale processing equipment is required.

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

(F) Since there are no restrictions on processing dimensions due to molds, wall materials of arbitrary dimensions can be obtained.

[Example] Hereinafter, the method of the present invention will be described 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 the metal plate is formed into the shape shown in Figure 2 by press working or the like. . That is, the left and right side edges of the metal plate 10 are attached to a plurality of mounting tongues 11,
The four corners of the metal plate 10 are cut into an arc shape, and an appropriate number of cuts 13 are cut in the arc-shaped curved edges 12 at the four corners. Moreover, an appropriate number of openings 14 are bored inside the curved edge 12.

The shape of the cut 13 is arbitrary, but since the degree of shrinkage is greater toward the outside of the metal plate when bent, it is preferable to make it into a V-shape that opens outward. (see Figure 5), and the depth and width may be unified to the same size as shown in Figure 2, but they do not necessarily need to be unified; for example, 3
As shown in the figure, it may be formed so that the closer it is located to the center, the wider the width and the greater the depth.

On the other hand, the opening 14 is for absorbing the contraction of the intermediate portion of the side wall, and is formed in a portion located inside the notch 13 and between the adjacent notches 13, 13, and the shape is not shown in the figure. It is not limited to a circular shape as shown in the figure, but can be any shape such as an ellipse, a square, or a rhombus. The openings 14 may have the same size as shown in FIG. 2, but they may be arranged in multiple rows along the curved edge 12 as shown in FIG. The rows can be made larger than the inner rows.

Further, the metal plate may be previously subjected to a surface treatment such as plating, painting, or vinyl coating.

Next, the four sides of the metal plate 10 are drawn with straight folded lines 1
5 at a right angle, and the four corners are bent along arcuate fold lines 16, thereby forming side walls 17 having arcuate corners 18, as shown in FIG. The bending work on the four sides can be performed using a machine such as a bender, and the bending work on the four corners can be performed by a simple drawing process.

When the four corners are bent, as shown in FIG. 4, the notches 13 and the openings 14 are crushed and closed in a linear manner, and at the same time, the contraction of the metal plate is absorbed by these collapses. The shrinkage difference in the height direction of the side wall 17 is absorbed and alleviated, and the bending can be performed very easily and smoothly. At this time, even if there is a slight gap between the closed portion of the notch 13 and the opening 14, there is no problem in closing the gap because the caulking material is filled.

When the bending of the side wall 17 is completed, the side wall 17
Bend the tongue piece 11 at the tip outward at a right angle. Note that the bending of this tongue piece 11 is similar to that of the side wall 17.
It can also be done at the same time as the bending.

In this way, a wall member as shown in FIG. 4 can be obtained, which is arranged one after another on the wall surface and fixed using the tongue piece 11.
At this time, the tongue pieces 1 on the left and right edges of the wall material
Since the phases of 1 and 11 are shifted from each other, the tongues of adjacent wall materials do not overlap each other, which makes installation very easy, and even when replacing damaged wall materials. It is convenient because only damaged items can be easily replaced.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional wall member, Fig. 2 is a front view showing the state of the metal plate before bending in the method of the present invention, and Fig. 3 is a front view of main parts showing another example of the structure of the metal plate. 4 is a partial perspective view of a metal plate in a bent state, and FIG. 5 is a perspective view of a wall material obtained by the method of the present invention. 10...Metal plate, 12...Curved edge, 13...Notch, 14...Open hole.

Claims (1)

[Claims] 1 Cut out the four corners of a rectangular metal plate in an arc shape,
A suitable number of cuts having a depth of less than half the height of the side wall are provided on the arcuate curved edges at the four corners, and an opening is cut in a portion located between the adjacent cuts inside the cuts. By bending the four sides of the metal plate provided with these cuts and holes to a certain height, and bending the four corners into an arc shape, the shrinkage caused by bending the metal plate can be avoided in the cuts and holes. A method for manufacturing a wall material, characterized in that a predetermined wall material is obtained while absorbing.