Production method of angle member

Abstract

To provide a production method of an angle member such as a corner guard with functionality and design while reducing resource loss and waste.SOLUTION: A production method of an angle member (for example, a corner guard for a projected corner in a building) comprises steps of: cutting out a first sheet material (sheet product) from an original plate composed of a surface material and a base material; cutting out a second sheet material (angle material) from the original plate from which the first sheet material has been cut out; and bending the second sheet material using a predetermined pressing pressure. The predetermined pressing pressure is determined according to the material, length, and thickness of the second sheet material.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for manufacturing angle irons used as corner guards in buildings. [Background technology]

[0002] For example, decorative sheet materials are attached to the interior walls of elevators in buildings, contributing to improving the design and functionality of the elevator interior.

[0003] Such decorative sheet material is manufactured by cutting out areas 101, 102 of a size suitable for the intended use (areas indicated by dotted lines in Figure 8(a)) from an original decorative sheet material 100, excluding the peripheral areas where scratches and defects are likely to occur, as shown in Figure 8(a), for example. Summary of the Invention [Problem to be solved by the invention]

[0004] When cutting out the decorative sheet materials (products) 101 and 102 using the above-mentioned method, unused original sheet material (the area indicated by diagonal lines in Figure 8(b)) is discarded during the manufacturing process, and in some cases this accounts for as much as half of the total. As there is a demand for reducing environmental impact and realizing a recycling-oriented society, there is a need to reduce resource loss and waste generation.

[0005] The present invention has been made in view of the above, and has an object to provide a method for manufacturing angle bars such as corner guards while suppressing resource loss and waste generation. [Means for solving the problem]

[0006] One embodiment of the present invention is a method for manufacturing angle bars, which includes the steps of cutting a first sheet material from an original plate consisting of a surface material and a base material, cutting a second sheet material from the original plate after cutting the first sheet material, and bending the second sheet material with a predetermined pressing force. This allows for the manufacture of angle bars such as corner guards that improve functionality and design and contribute to the effective use of resources.

[0007] In the bending step, the predetermined pressing force is determined according to the material, length, and thickness of the second sheet material. This allows the bending angle to be constant even if the material, length, and thickness of the second sheet material are different. Furthermore, the angle iron is preferably a corner guard for an external corner of a building, and the corner guard is preferably 80 cm to 100 cm long. [Effects of the Invention]

[0008] According to the present invention, angle materials such as corner guards that are functional and attractive can be manufactured while reducing resource loss and waste. [Brief explanation of the drawings]

[0009] [Figure 1] 10A to 10C are diagrams illustrating a manufacturing process of a corner guard according to one embodiment. [Figure 2] FIG. 10 is an explanatory diagram showing an example of cutting out a corner guard material from an original plate of a decorative sheet material. [Figure 3] 10 is an explanatory diagram showing another example of cutting out corner guard material from an original plate of decorative sheet material. FIG. [Figure 4] 10 is an explanatory diagram showing an example of a bending operation of a corner guard material. FIG. [Figure 5] FIG. 2 is an external perspective view of the corner guard. [Figure 6] FIG. 10 is a perspective view showing an example of a corner guard attached to an exterior corner of a building. [Figure 7] FIG. 10 is a perspective view showing another example of a corner guard attached to an exterior corner portion of a building. [Figure 8] 10 is an explanatory diagram showing an example of cutting out a sheet material for an elevator inner wall from an original plate of a decorative sheet material. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a method for manufacturing a corner guard will be described as an embodiment of the present invention. Note that the same or corresponding components are designated by the same reference numerals and redundant description will be omitted.

[0011] Figure 1 illustrates the manufacturing process for a corner guard according to one embodiment. A decorative sheet material (base sheet) 10 is a melamine decorative sheet, for example, made by laminating melamine resin on the surface of a metal (aluminum, stainless steel, iron, etc.). It is fed into a sheet cutting machine 11 and cut into corner guard materials of a predetermined size, along with a decorative sheet material (product) tailored to the intended use (for example, a decorative sheet to be attached to the interior walls of an elevator). The cut corner guard material is fed into a V-bending machine 12 and bent to produce corner guards 13.

[0012] The sheet cutting machine 11 is equipped with, for example, a cutter, a cutter movement mechanism, and an input device, and moves the cutter to a predetermined position using the cutter movement mechanism to cut the decorative sheet material 10 to a predetermined size. The input device is, for example, a general-purpose computer, and has installed therein software for specifying the cutting area of the decorative sheet material 10, and the operator can operate it to set the cutting area according to the size of the decorative sheet material (product).

[0013] The sheet cutting machine 11 may further include a scanning device that captures an image of the surface of the decorative sheet material 10 and outputs the image data, and software that analyzes the image data to detect the presence or absence of scratches or defects. This makes it possible to automatically extract areas that are free of (or have few) scratches or defects, and cut out decorative sheet material (products) of a predetermined size.

[0014] Figure 2 shows an example of cutting out corner guard material from a raw sheet of decorative sheet material. In Figure 2(a), areas 21 and 22 (areas indicated by dotted lines in Figure 2(a)) of a size suited to the intended use are cut out from the inner region of decorative sheet material (raw sheet) 20, excluding the peripheral edge where scratches and defects are likely to occur, to produce a decorative sheet material (product) suited to the intended use (for example, a decorative sheet to be attached to the interior wall of an elevator). In the example of Figure 2, the central portion of decorative sheet material (raw sheet) 20 is cut out, but the cut-out areas may be changed as appropriate depending on the occurrence of scratches and defects.

[0015] As shown in Figure 2(b), decorative sheet material (products) 21 and 22 are cut out of decorative sheet material (base sheet) 20, and then strips corresponding to the length of the corner guards are cut out to produce corner guard materials 23-29. These corner guard materials 23-29 are intended to protect the corners of office and apartment corridors from scratches and abrasions, and are not primarily used for decorative purposes. Therefore, even if some scratches or defects are present, this does not pose a practical problem. This allows decorative sheet material that would previously have been discarded to be effectively utilized, reducing resource loss and waste generation.

[0016] Figure 2(c) shows the decorative sheet material (original plate) 20 after the corner guard materials 23 to 29 have been cut out, with the diagonal lines indicating the areas that remain as decorative sheet material (original plate) 20. By effectively utilizing areas that would previously have been discarded as corner guard materials, it is possible to reduce resource loss and waste generation.

[0017] Figure 3 shows another example of cutting a corner guard material from an original plate of decorative sheet material. In Figure 3(a), an inner region 32 (the region indicated by the dotted line in Figure 3(a)) is cut out from decorative sheet material (original plate) 30, excluding peripheral edge 31 where scratches and defects are likely to occur. Then, as shown in Figure 3(b), regions 33 and 34 (the regions indicated by the dotted lines in Figure 3(b)) of a size appropriate for the intended use are cut out, thereby producing a decorative sheet material (product) appropriate for the intended use (for example, a decorative sheet to be attached to the interior walls of an elevator).

[0018] Here, as shown in Figure 3(b), corner guard materials 35a to 35d are produced by cutting out strips according to the length of the corner guards from the peripheral edge 31 of decorative sheet material (base sheet) 30. As a result, similar to the example in Figure 2, decorative sheet material that would previously have been discarded can be effectively utilized, thereby reducing resource loss and waste generation.

[0019] Furthermore, in the decorative sheet material (base plate) 30 after cutting out the peripheral edge 31, the area (area 36 in FIG. 2(c)) that remains after cutting out the decorative sheet materials (products) 33 and 34 can also be cut out into strips according to the length of the corner guard material, thereby cutting out corner guard materials 37a and 37b. According to this embodiment, the area that is discarded can be further reduced, minimizing resource loss and waste generation.

[0020] 4 is an explanatory diagram showing the process of manufacturing a corner material by bending a corner guard material cut out from an original plate sheet. In a V-bending machine 12, a corner guard material 40 is set on a concave die 41, and a convex punch member 42 positioned above the die 41 is pressed down to process the corner guard material 40 into a V-shape, producing a corner guard 43 shown in FIG. 5.

[0021] When used as a corner guard for an inside corner of a building, the bending angle θ of the corner guard 43 needs to be 90 degrees. However, the pressing force required for V-bending varies depending on the material (tensile stress), length, and thickness of the corner guard material 40. This can result in cases where the bending angle θ is not exactly 90 degrees. For this reason, it is preferable to determine through testing in advance the pressing force appropriate to the material, length, and thickness of the corner guard material 40 (the pressing force that will result in a 90-degree bending angle for the corner guard 43 after V-bending). This ensures that the bending angle is 90 degrees even when the material, length, and thickness of the corner guard material 40 to be pressed are different.

[0022] The corner guard 43 thus produced can be used as a corner guard for the exterior corners of a building by attaching double-sided tape to the inside of the folded portion, as shown in FIG. 6. This allows the corners of the building to be protected from scratches and dirt while still providing a beautiful appearance (design). Furthermore, since the corners of a building are prone to scratches, for example, at the bottom where a dolly comes into contact, it is not necessary to attach the corner guard to the entire corner; a length of 80 cm to 100 cm is preferable. This allows many corner guards to be manufactured from the decorative sheet material (base plate).

[0023] Figure 7 shows another example of use as a corner guard for an exterior corner of a building. Corner guards 43 and 44 of different lengths can be arranged side by side to completely cover the corner, or to expose only the upper part of the corner, which is less visible to pedestrians. If corner guard 43 becomes noticeably scratched or dirty, only that corner guard 43 needs to be replaced, thereby reducing resource loss and waste generation.

[0024] In the above embodiment, an example was given of using sheet material (which had been discarded) after being cut out from decorative sheet material (raw sheet) as a corner guard for an exterior corner of a building, but the present invention is not limited to this and it can also be used, for example, as a stationary nameplate.

[0025] The above-described embodiments have been described for the purpose of enabling a person having ordinary skill in the art to practice the present invention. Various modifications of the above-described embodiments would naturally be possible for a person skilled in the art, and the technical concept of the present invention may also be applied to other embodiments. The present invention is not limited to the described embodiments, but is to be interpreted in the broadest scope in accordance with the technical concept defined by the claims. [Explanation of symbols]

[0026] 10, 20, 30 decorative sheet material 11 Sheet cutting machine 12 V bending machine 23~29, 35a~35d, 37a, 37b, 40 Corner guard material 13, 43, 44 Corner guard

Claims

1. A step of cutting out a first sheet material from an original plate composed of a surface material and a base material; cutting out a second sheet material from the original plate after cutting out the first sheet material; Bending the second sheet material with a predetermined pressing force. A method for manufacturing angle iron comprising the steps of:

2. 2. The method for manufacturing an angle bar according to claim 1, wherein in the bending step, the predetermined pressing force is determined depending on the material, length and thickness of the second sheet material.

3. 2. The manufacturing method according to claim 1, wherein the angle member is a corner guard for an exterior corner of a building.

4. The manufacturing method according to claim 3, wherein the corner guard has a length of 80 cm to 100 cm.

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