JPS61273226A - Production of wall material - Google Patents

Abstract

PURPOSE:To absorb the shrinkage on the metallic plate of a corner part and to enable the bend forming of the wall material with high side wall by providing a notch on the curved edge by cutting in a circular arc shape the four corners of a square metallic plate and by bending in a circular arc shape the four coners and to a fixed height the four sides by providing an open hole at the inner side of the curved edge. CONSTITUTION:The right and left both side edges of a metallic plate 10 are cut in the shape of plural tongues 11, 11 for fitting being connected in the state of the phase slippage each other and the four corners are removed in circular arc shape as well. An adequate number of notches 13 is cut on a curved edge 12 and an adequate number of openings 14 is made at the inner side of the curved edge 12 as well. The side wall 17 having the corner 18 of circular arc shape is then formed by bending at right angles on a broken line 15 the four sides of the metallic plate 10 and by bending the four corners on the broken line 16. In this case the notch 13 and opening 14 are closed linearly with being crushed, the shrinkage of the metallic plate is absorbed, the differential shrinkage in the height direction of the side wall 17 is simultaneously eased with its absorption and the bending is smoothed.

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 plate-shaped wall material having a side wall 2 integrally provided around a base l. This kind of wall material.

Conventionally, rectangular metal plates have been formed by drawing, but this process has the following drawbacks.

(a) The metal plate will shrink at a portion of the corner of the side wall, and there will be a difference in shrinkage in the height direction of the side wall, so it is very difficult to narrow it down and it is difficult to obtain a wall material for the high side wall. 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 intensively on the aperture area, 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 furthermore, it is only possible to obtain products with specific dimensions that match 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 a portion of the corner, thereby making it possible to manufacture a wall material with a high side wall by a simple bending process. It is something.

[Means for Solving the Problems] In order to achieve the above object, the method of the present invention involves cutting the four corners of a rectangular metal plate into arc shapes, and making an appropriate number of cuts on the curved edges of the arc shapes at the four corners. and) a step of bending the four sides of the Z-marked metal plate to a certain height and bending the four corners into an arc shape. It is characterized by the fact that

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

(A) When bending a part of the corner 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 obtain wall material with high side walls.

(B) If you try to absorb shrinkage only by making a cut with the curved edge, it is necessary to make the cut wide and deep according to the height of the side wall, which results in a decrease in the strength of a part of the corner and Although the cut becomes easier to open, in the present invention,
This is because both the notch on the curved edge and the opening inside the curved edge are provided.

There is no need to make the cut deep, the strength decrease at a portion of the corner is reduced, and the cut does not become wide open.

(C) 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 thickness unevenness or strength loss can be obtained.

(D) A mold and associated large-scale processing equipment are not 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 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 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 cut into a shape in which a plurality of mounting tongues 11 are arranged in a phase-shifted manner, and the four corners of the metal plate 10 are cut out in an arc shape. An appropriate number of notches 13 are cut in the arc-shaped curve t&12, and an appropriate number of holes 14 are bored inside the curved edge 12.

The shape of the cut 13 is arbitrary, but since the degree of shrinkage on the outside of the metal plate is large when bent, it is preferable to make it into an outward-opening V-shape, and the width and depth of each cut 13 are as follows: They may be unified to the same size as shown in Figure 2, but it is not necessary to unify them; for example, the third
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 above-mentioned openings 14 are for absorbing the contraction of the middle part of the side wall, and the shape of these openings 14 is not limited to the circular shape as shown in the figure, but can be any arbitrary shape such as an ellipse, a square, or a rhombus. It can be any shape. In addition, the opening 14
may be unified to the same size as shown in FIG. 2, or may be arranged in multiple rows along the curved edge 12 as shown in FIG.
It is also possible to make the outer rows with a higher degree of shrinkage 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 IO are bent at right angles along the linear fold line 15, and the four corners are bent along the arc-shaped fold line 50, thereby forming arc-shaped corners as shown in FIG. Forming a side 917 having 18. 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, the notches 13 and the openings 14 collapse and close in a linear manner as shown in FIG. The shrinkage difference in the height direction of 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 will be no problem in closing the rain because the kneeking material is filled.

When the bending of the side [17] is completed, the tongue piece 11 at the tip of the side wall 17 is bent outward at a right angle. Note that the tongue piece 11 can be bent at the same time as the side wall 17 is bent.

In this way, it is possible to obtain a wall member as shown in FIG.
It is fixed using. At this time, since the phases of the tongues 11, 11 on the left and right edges of the wall material are shifted from each other, the tongues of adjacent wall materials do not overlap with each other, and therefore the installation is very easy. Even when replacing damaged wall materials, it is convenient because only the damaged material can be replaced easily.

[Brief explanation of the drawing]

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. The four corners of a rectangular metal plate are cut into arc shapes, and an appropriate number of cuts are provided on the curved edges of the arc shapes at the four corners, and
It is characterized by comprising the steps of: providing an appropriate number of openings inside the curved edge; and bending the four sides of the metal plate to a certain height, and bending the four corners into an arc shape. Method of manufacturing wall materials.