WO2009025476A1

WO2009025476A1 - Metal panel for roofing tile type

Info

Publication number: WO2009025476A1
Application number: PCT/KR2008/004773
Authority: WO
Inventors: Kwan-Sun Kim
Original assignee: Kwan-Sun Kim
Priority date: 2007-08-20
Filing date: 2008-08-18
Publication date: 2009-02-26
Also published as: KR200438308Y1; CN101827985B; CN101827985A

Abstract

Disclosed is a metal panel of a roofing tile type having the aesthetic appearance of traditional Korean tiled roofs. The panel has a number of protruding patterns and stepped portions formed thereon to increase the rigidity and improve the strength of the panel. The protruding patterns prevent operators from slipping. The panel has crests and troughs alternating with each other in the transverse direction. Transverse protruding patterns are repeatedly formed on the crests, and longitudinal protruding patterns are formed on the troughs. Stepped portions are formed on the troughs at a predetermined interval to provide the aesthetic appearance of tiled roofs.

Description

Description METAL PANEL FOR ROOFING TILE TYPE

Technical Field

[1] The present invention relates to a metal panel of a roofing tile type, and more particularly to a metal panel of a roofing tile type fabricated by subjecting a thin metal panel to a bending operation using a roll forming machine and to a pressing operation using a press forming machine so that the panel is shaped like traditional Korean tiles. Background Art

[2] As generally known in the art, some houses, prefabricated buildings, and temporary buildings have tile- shaped metal roofs, which have been bent and shaped like traditional tiles. Unlike clay or cement tiled roofs, the tile- shaped metal roofs are light, easy to install, weatherproof, durable, and look good. Therefore, they are widely used as the roofing of modern buildings.

[3] FIG. 1 is a perspective view of a conventional tile-shaped metal roof. As shown in

FIG. 1, the conventional tile-shaped metal roof is fabricated by bending a thin metal panel, which has been wound into a roll, by a roll forming machine so that a number of crests 11 and troughs 12 are formed in the transverse direction, and by bending the panel at a predetermined interval in the longitudinal direction by a press forming machine so that the panel has the shape of tiles 10.

[4] However, the conventional tile-shaped metal roof, which is obtained by processing a thin metal panel, has insufficient strength, and has the following problems.

[5] Firstly, the conventional metal roof has insufficient strength, and both ends may twist.

[6] In an attempt to solve this problem, it has been proposed to form reinforcements 13 in predetermined spaces on both ends of the metal roof so that the increased strength prevents the metal roof from twisting. However, the reinforcements 13 unnecessary occupy space of the metal roof, in which otherwise crests 11 and troughs 12 are formed, and reduce the total effective width of the roof. This is economically unfavorable.

[7] Secondly, the tile-shaped metal roof may deform (e.g. twist, collapse) or fracture after installation due to insufficient strength. Furthermore, more wooden and metallic materials need to be used as molds during installation to compensate for insufficient strength. This increases the installation cost.

[8] Thirdly, when a number of metal panels of a roofing tile type are connected to form a roof, rainwater may flow backward through the gap between overlapping panels. This may cause a serious problem of leakage through the roof. [9] Fourthly, conventional tile-shaped metal roofs have a safety problem in that operators may slip on their smooth surface and fall during installation. In addition, snow accumulated on the roof in winter may melt suddenly and damage the waterspout on the eaves or hurt pedestrians.

[10] Fifthly, conventional tile-shaped metal roofs have stepped portions formed on both crests 11 and troughs 12 to look like tiles. However, actual tiled roofs have stepped portions on troughs only. As a result, conventional tile-shaped metal roofs do not look like actual tiled roofs, to say nothing of the aesthetic appearance of traditional Korean tiled roofs.

Disclosure of Invention Technical Problem

[11] Therefore, the present invention has been made in view of the above-mentioned problems, and the present invention provides a metal panel of a roofing tile type having a number of protruding patterns and stepped portions so that the increased rigidity improves the strength of the panel.

[12] The present invention also provides a metal panel of a roofing tile type having stepped portions formed on troughs only to simulate the aesthetic appearance of traditional Korean tiled roofs. Technical Solution

[13] In accordance with an aspect of the present invention, there is provided a metal panel of a roofing tile type including crests and troughs alternating with each other in a transverse direction, and an overlapping portion formed on an end to overlap an adjacent second metal panel of a roofing tile type, wherein the crests bent upward have transverse protruding patterns repeatedly formed through an entire longitudinal span so as to protrude from a top or bottom surface in an arc shape, the troughs bent downward have stepped portions repeatedly formed through the entire longitudinal span at a predetermined interval, and longitudinal protruding patterns are repeatedly formed between adjacent stepped portions so as to protrude from the top or bottom surface in a linear shape.

Advantageous Effects

[14] The metal panel of a roofing tile type according to the present invention has the following advantages. [15] Firstly, the metal panel of a roofing tile type has various protruding patterns formed on crests and troughs so that the increased rigidity improves the strength of the panel. [16] Secondly, the improved rigidity of the metal panel reduces the number of wooden and metallic materials used as molds during installation. This ensures easy installation and reduces the material cost. [17] Thirdly, the improved rigidity of the metal panel reduces the possibility of deformation of the metal roof (e.g. twisting, deformation). This makes it unnecessary to form reinforcements on lateral ends of the metal roof, which are needed by the prior art to prevent twisting. This increases the total effective width of the panel. [18] Fourthly, the protruding patterns formed on the metal panel have anti-slip properties so that operators do not slip. In addition, accumulated snow is prevented from sliding down suddenly. [19] Fifthly, the stepped portions solely formed on the troughs of the metal panel simulate the aesthetic appearance of traditional Korean tiled roofs.

Brief Description of the Drawings [20] The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:

[21] FIG. 1 is a perspective view of a conventional tile-shaped metal roof;

[22] FIG. 2 is a perspective view of a metal panel of a roofing tile type according to an embodiment of the present invention; [23] FIG. 3 is a front view of a metal panel of a roofing tile tye according to an embodiment of the present invention; [24] FIG. 4 is a top view of a metal panel of a roofing tile type according to an embodiment of the present invention; [25] FIG. 5 is a lateral sectional view of a metal panel of a roofing tile type according to an embodiment of the present invention; [26] FIG. 6 is a front sectional view magnifying the overlapping portion and drain channel of a metal panel of a roofing tile type according to an embodiment of the present invention;

[27] FIG. 7 shows metal panels of a roofing tile types overlapping each other for use; and

[28] FIG. 8 shows metal panels of a roofing tile type installed on a building.

Mode for the Invention [29] Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. [30] FIG. 2 is a perspective view of a metal panel of a roofing tile type according to an embodiment of the present invention. FIG. 3 is a front view of the metal panel of a roofing tile type. FIG. 4 is a top view of the metal panel of a roofing tile type. FIG. 5 is a lateral sectional view of the metal panel of a roofing tile type. [31] As shown in FIGs. 2-5, the metal panel of a roofing tile type according to the present invention has crests 110 (bent upward) and troughs 120 (bent downward) formed in the transverse direction while alternating with each other. An overlapping portion 130 is formed on a transverse end of the panel so that it overlaps another panel.

[32] The crests 111 have transverse protruding patterns 111 repeatedly formed through the entire longitudinal span so as to protrude from the top or bottom surface in an arc shape. The troughs 120 have stepped portions 122 repeatedly formed through the entire longitudinal span at a predetermined interval in the shape of tiles. Longitudinal protruding patterns 121 are repeatedly formed between adjacent stepped portions 122 in a linear shape (e.g. T) so as to protrude from the top or bottom surface.

[33] The overlapping portion 130 is formed by partially bending an end of the metal panel of a roofing tile type upward so that it overlaps another metal panel of a roofing tile type.

[34] Preferably, a predetermined part of the overlapping portion 130 is bent to form a drain channel 131, which defines space in the longitudinal direction of the panel so that rainwater can be drained.

[35] FIG. 6 is a front sectional view magnifying the overlapping portion and drain channel of a metal panel of a roofing tile type according to an embodiment of the present invention. FIG. 7 shows metal panels of a roofing tile type overlapping each other for use. FIG. 8 shows metal panels of a roofing tile type installed on a building.

[36] The metal panel of a roofing tile type is fabricated in the following manner: a thin metal panel, which has been wound into a roll, is subjected to a bending process using a roll forming machine to form a number of crests 110 and troughs 120 in the transverse direction. The panel is then subjected to a pressing process using a press forming machine to form stepped portions 122 on the troughs 120 at a predetermined interval in the longitudinal direction. During the pressing process, transverse protruding patterns 111 and longitudinal protruding patterns 121 are repeatedly formed throughout the entire longitudinal span of the panel so as to protrude from the crests 110 and troughs 120.

[37] The metal panel of a roofing tile type having the above-mentioned structure is advantageous in that the transverse protruding patterns 111 and longitudinal protruding patterns 121 formed on the crests 110 and troughs 120, respectively, as well as the stepped portions 122 formed on the troughs 120, increase rigidity (tensile rigidity, compressive rigidity, vertical rigidity, shear rigidity) and improve the strength of the panel. As a result, both edges of the panel do not twist. The inventive metal panel is thus more economically favorable than conventional metal panels, which have insufficient strength and thus have reinforcements formed on both sides to prevent the panels from twisting, and which have a reduced total effective width.

[38] In addition, the improved strength of the inventive metal panel of a roofing tile type prevents it from deforming (e.g. twisting, collapsing) during installation and guarantees reliable installation even if the number of wooden and metallic materials used as molds is reduced. In other words, this guarantees simple installation and reduces the cost.

[39] When metal panels of a roofing tile type are connected to each other, a gap is created at the junction of overlapping portions, and rainwater may flow backward through the gap and leak. However, the middle of the overlapping portion 130 of the inventive metal panel of a roofing tile type is bent to form a drain channel 131, through which rainwater can be drained without leaking.

[40] Conventional tile- shaped metal roofs do not look like actual tiled roofs, because both crests and troughs have stepped shapes. However, the tile-shaped metal roof according to the present invention has stepped portions 122 formed on the troughs 120 only to provide the aesthetic appearance of actual tiled roofs.

[41] Although several exemplary embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

[1] A metal panel of a roofing tile type comprising: crests and troughs alternating with each other in a transverse direction; and an overlapping portion formed on an end to overlap an adjacent second metal panel of a roofing tile type, wherein the crests (110) bent upward have transverse protruding patterns (111) repeatedly formed through an entire longitudinal span so as to protrude from a top or bottom surface in an arc shape, the troughs (120) bent downward have stepped portions (122) repeatedly formed through the entire longitudinal span at a predetermined interval, and longitudinal protruding patterns (121) are repeatedly formed between adjacent stepped portions (122) so as to protrude from the top or bottom surface in a linear shape.