C-channel having enhanced fastening strength

Abstract

The present invention relates to a C-channel steel having enhanced fastening strength and, more preferably, to a C-channel steel having enhanced fastening strength for enabling, when roof members, walls, steel structures and solar structures (hereinafter, referred to as “panels”) of a building are coupled to the C-channel steel by means of fasteners (fastening screws, bolts and the like) in order to support and fix same, the panels to be fixed thereto since the fastener fastened to the C-channel are firmly fastened without separation even if the panel receives vibration, receives wind pressure or external pressure, or undergoes contraction and expansion due to seasonal changes in temperature. The C-channel steel comprises: an upper horizontal plate 20 bent on the upper side of a side surface plate 10; an upper vertical plate 30 bent toward the lower side of the upper horizontal plate 20; a first inner horizontal plate 40 bent toward the inner side of the upper vertical plate 30 and formed to have a space from the side surface plate 10; a lower horizontal plate 50 bent on the lower side of the side surface plate 101; and a lower vertical plate 60 bent toward the upper side of the lower horizontal plate 50, thereby enhancing the fastening strength of the fasteners 110.

Description

TECHNICAL FIELD

[0001] The present invention relates to a C-channel steel having enhanced fastening strength and, more preferably, to a C-channel steel having enhanced fastening strength for enabling, when roof members, walls, steel structures and solar structures (hereinafter, referred to as “panels”) of a building are coupled to the C-channel steel by means of fasteners (fastening screws, bolts and the like) in order to support and fix same, the panels to be fixed thereto since the fastener fastened to the C-channel are firmly fastened without separation even if the panel receives vibration, receives wind pressure or external pressure, or undergoes contraction and expansion due to seasonal changes in temperatureBACKGROUND

[0002] Generally, a channel steel refers to rolled steel products with various cross-sectional shapes in the form of bars, and is primarily used for steel frame structures, such as the fixed frames of building exterior walls.

[0003] The channel steel is manufacturing by the following processes: First, molten steel is poured into molds shaped like prismatic columns to produce steel ingots, impurities are removed to make the ingots dense, the ingots are reheated in a furnace, and fed into a rolling mill, where they pass through about multiple stages of shaped rollers to be finished into various cross-sectional shapes.

[0004] Subsequently, depending on its cross-sectional shape, the channel steel is classified into equilateral ┐-shape, unequal ┐-shape, H-shape, I-shape, T-shape, Z-shape, T-shape, and C-shape.

[0005] Generally, rolled steel material for structural use has a tensile strength of approximately 40 to 60 kg / mm2. The length of commercially available products is typically 35 to 12 m.

[0006] Among these, C-channel steel is primarily used for structural purposes to support the fastening objects coupled thereto.

[0007] FIG. 1 is a diagram illustrating a conventional process of fastening a bolt and a nut onto a C-channel steel using an electric screwdriver.

[0008] As shown in FIG. 1, the C-channel steel is fastened to an angular member to be fastened at the upper part by means of a bolt and a nut.

[0009] An electric screwdriver is typically used for fastening, and the tool rotation axis of an electric screwdriver forms a straight line.

[0010] A conventional C-channel steel has fastening holes formed at the upper part inside. At the time of a fastening operation using an electric screwdriver, the rotation axis of the tool causes interference with the lower end of the C-channel steel, so that the operation is very inconvenient.

[0011] Meanwhile, C-channel steel is primarily received vertical loads from the fastening object fastened to the upper part.

[0012] In order to support a larger vertical load, the vertical members of the C-channel steel must be made thicker, which causes an increase of costs.

[0013] Further, Korean Patent Registration No. 10-2333509, entitled “Installation method using T-PARA BOLT when installing a solar structure on an existing steel structure” discloses a technology that allows for easy folding or unfolding of a rotating bracket fastened to the end of a bolt depending on the relative movement of a cover member relative to the bolt. This method poses a problem that T-PARA bolt tightening process is complicated, and vibration, compression, and expansion can cause the rotating brackets attached to the end of the bolt to loosen while moving, thereby weakening the fastening strength.

[0014] Further, Korean Patent Registration No. 10-1492412, entitled “Sandwich panel structure for a construction” discloses a structure in which the fastener a fastened for coupling a panel to a C-channel steel b is simply screw-coupled onto the panel, as shown in FIG. 2. Therefore, the screw groove attached to the C-channel steel is widened due to vibration, contraction, and expansion, which causes a problem that the fastener is separated and the fastening strength is not strong.

[0015] In this way, in the coupling of a conventional C-channel steel and its members, first, the cross-sectional thickness of the C-channel streel is approximately 1.2 mm to 3.2 mm. When fastening with fastening screws, the cross-sectional area of the C-channel streel is small, so that continuous external pressure, such as vibration or wind pressure, causes the screws to loosen, which results in water leakage and fastening loosening.

[0016] As such, the conventional fastening method between a C-channel steel and its members has the following drawbacks: First, when the cross-sectional thickness of the C-channel steel is approximately 1.2 T~3.2 mm, and the C-channel steel is fastened with a fastening screw, the cross-sectional area of the fastening is small, so that continuous external pressure, such as vibration or wind pressure, can cause the screws to loosen, which results in water leakage and loosening of the fastening screws.

[0017] Therefore, Korean Utility Model Registration No. 20-0493917 has developed “C-channel steel for facilitating fastening operation”, but as shown FIG. 3, this configuration involves forming the upper and lower bending surfaces of the C-channel steel to be coupled to the panel to have different lengths from each other, allowing for easy assembly of nuts into the fasteners connected to the C-channel steel using a power tool. However, this technology is inconvenient as it requires a lot of work space when installed on-site, and also poses the problem of being bulky and difficult to store in large quantities.DETAILED DESCRIPTION OF THE INVENTIONTechnical Problem

[0018] The present invention has been devised in view of the above-mentioned conventional techniques, and an object of the present invention is to provide a C-channel steel that enhances fastening strength for enabling, when panels are fastened to the C-channel steel by means of fasteners in order to support and fix same, the panels to be fixed thereto since the fastening pieces fastened to the C-channel are firmly fastened without come-off or separation even if the panel receives vibration, receives wind pressure or external pressure, or undergoes contraction and expansion.

[0019] Another object of the present invention is to provide a C-channel steel that does not cause a phenomenon where fasteners are loosened or detach due to external pressure, thereby resolving the problem of water leakage through screw holes into which fasteners are inserted.

[0020] Yet another object of the present invention is to provide a C-channel steel that can be used for interior building construction and structural purposes, and can firmly fix panels with fasteners when used primarily in roofing materials, wall partitions, etc.Technical Solution

[0021] The configuration of a C-channel steel having enhanced fastening strength according to the present invention, which is intended to achieve the above objects, is described in detail below with reference to the accompanying drawings.

[0022] As shown in FIG. 4, the C-channel steel 100 having enhanced fastening strength according to an aspect of the present invention is characterized in that it comprises: an upper horizontal plate 20 bent on the upper side of a side surface plate 10; an upper vertical plate 30 bent toward the lower side of the upper horizontal plate 20; a first inner horizontal plate 40 bent toward the inner side of the upper vertical plate 30 and formed to have a space from the side surface plate 10; a lower horizontal plate 50 bent on the lower side of the side surface plate 101; and a lower vertical plate 60 bent toward the upper side of the lower horizontal plate 50, thereby enhancing the fastening strength of the fasteners 110.

[0023] In an embodiment of the present invention, the first inner horizontal plate 40 is tightly attached to the side surface plate 10 and integrally coupled by welding.

[0024] In an embodiment of the present invention, the C-channel steel comprises: an upper horizontal plate 20 bent on the upper side of the side surface plate 10; an upper vertical plate 30 bent toward the lower side of the upper horizontal plate 20; a first inner horizontal plate 40 bent toward the inner side of the upper vertical plate 30; a lower horizontal plate 50 bent on the lower side of the side surface plate 101; and a lower vertical plate 60 bent toward the upper side of the lower horizontal plate 50,

[0025] wherein a first stopper groove 70 is formed on the side of the side surface plate 10 facing the first inner horizontal plate 40, so that the end side of the first inner horizontal plate 40 is inserted into the first stopper groove 80 and movably engaged.

[0026] In an embodiment of the present invention, the C-channel steel comprises: an upper horizontal plate 20 bent on the upper side of the side surface plate 10; an upper vertical plate 30 bent toward the lower side of the upper horizontal plate 20; a first inner horizontal plate 40 bent toward the inner side of the upper vertical plate 30; a lower horizontal plate 50 bent on the lower side of the side surface plate 101; a lower vertical plate 60 bent toward the upper side of the lower horizontal plate 50; and a second inner horizontal plate 70 bent toward the inner part side of the lower vertical plate 60,

[0027] wherein a first stopper groove 80 is formed on the side of the side surface plate 10 facing the first inner horizontal plate 40, so that the end side of the first inner horizontal plate 40 is inserted into the first stopper groove 80 and movably engaged,

[0028] wherein a second stopper groove 90 is formed on the side of the side surface plate 10 facing the second inner horizontal plate 70, so that the end side of the second inner horizontal plate 70 is inserted into the second stopper groove 90 and movably engaged.

[0029] In an embodiment of the present invention, a fastener 110 is screw-coupled to the upper horizontal plate 20 and the first inner horizontal plate 40, thereby enhancing the fastening strength so that the fastener 110 does not detach due to vibration, wind pressure, and external pressure.Advantageous Effects

[0030] In the present invention having the above characteristics, when panels including roof members, walls, steel structures and solar structures are coupled to the C-channel steel, the fasteners fastened to the C-channel steel are doubly screw-coupled to the upper horizontal plate and the first inner horizontal plate, which enhances the fastening strength and improves the fixing strength to prevent separation or detachment due to vibration, wind pressure, external pressure, etc.

[0031] Further, in the present invention, since the first inner horizontal plate is inserted and engaged into the first stopper groove formed in the side surface plate of the C-channel steel, the first inner horizontal plate moves within the first stopper groove even when vibration, wind pressure, external pressure, etc. are applied thereto, so that the fastener maintains a firm fixing strength without separating from the screw grooves screw-coupled to the upper horizontal plate and the first inner horizontal plate.

[0032] In addition, even when vibrations and external pressure are applied, the fasteners do not detach from the screw grooves that are screw-coupled to the upper horizontal plate and the first inner horizontal plate of the C-channel steel, and are firmly fixed in place by the screws, preventing water leakage through the screw grooves.BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIGS. 1 to 3 are cross-sectional views illustrating a conventional C-channel steel.

[0034] FIG. 4 is a cross-sectional view and a perspective view illustrating a C-channel steel according to the present invention.

[0035] FIG. 5 is a cross-sectional view illustrating another first embodiment of a C-channel steel according to the present invention.

[0036] FIG. 6 is a cross-sectional view illustrating another second embodiment of a C-channel steel according to the present invention.

[0037] FIG. 7 is a cross-sectional view illustrating an embodiment of a C-channel steel according to the present invention used in a roof panel and a sandwich panel.

[0038] FIG. 8 is a perspective view illustrating an embodiment of a C-channel steel according to the present invention used in a wall panel and a floor panel.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The following detailed description of the present invention illustrate specific embodiments in which the present invention may be carried out, with reference to the accompanying drawings. These embodiments are described in sufficient detail so that those skilled in the art can carry out the present invention. It should be understood that various embodiments of the present invention, although different from each other, do not have to be necessarily mutually exclusive. For example, specific shapes, structures, and characteristics described herein with respect to an embodiment may be realized in other embodiments without departing from the spirit and scope of the present invention.

[0040] Furthermore, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be modified without departing from the spirit and scope of the present invention. Therefore, the following detailed description is not intended to be taken in a limiting sense, and the scope of the present invention is defined only by the appended claims, together with the full scope of equivalents to which such claims are entitled. Like reference numerals in the figures designate the same or similar functionality throughout the several aspects.

[0041] The main technical idea of the C-channel steel having enhanced fastening strength according to the present invention is not only to enhance fastening strength so that, when panels 120, 130, 140, or 150 are fastened to a C-channel steel 100, the fastening member 110 does not separate from the C-channel steel 100 and maintains the fastening strength firmly, but also to prevent water leakage through the screw grooves coupled to the fastening member 110.

[0042] The configuration of the C-channel steel 100 of the present invention as above will be described in detail with reference to FIG. 4.

[0043] The C-channel steel 100 according to the present invention has a substantially C-shaped cross section, as shown in FIG. 4, and comprises a side surface plate 10, an upper horizontal plate 20, an upper vertical plate 30, a first inner horizontal plate 40, a lower horizontal plate 50, and a lower vertical plate 60.

[0044] The side surface plate 10 is formed in a vertical direction and mainly support vertical loads.

[0045] Looking at the C-channel steel 100 constructed as described above, the processed side surface plate 10 is primarily bent at its the upper side to form the upper horizontal plate 20. Further, the upper horizontal plate 20 is secondarily bent to form the upper vertical plate 30. Then, the upper vertical plate 30 is thirdly bent to form the first inner horizontal plate 40.

[0046] At this time, the first inner horizontal plate 40 is not formed in close contact with the side surface plate 10, but rather forms a slight gap. Preferably, the 20~50 mm gap is formed so that the first inner horizontal plate 40 moves up and down.

[0047] Further, the side surface plate 10 is primarily bent at its lower side to form a lower horizontal plate 50. Further, the lower horizontal plate 50 is secondarily bent again to form a lower vertical plate 60.

[0048] When a roof panel 120 or a sandwich panel 130 is fastened to the C-channel steel 100 configured as above by means of the fastener 110, the fastening is achieved as shown in FIG. 7. That is, when the panels 120 and 130 are coupled to the C-channel steel 100 by means of the fastener 110, the fastener 110 is screw-coupled through the upper horizontal plate 20 bent at the upper side of the side plate 10 constituting the C-channel steel 100 and the first inner horizontal plate 40 formed on the lower side of the upper horizontal plate 20.

[0049] In this way, the fastener 110 doubly fastens the upper horizontal plate 20 and the first inner horizontal plate 40 of the C-channel steel 100, so that the fastener 110 is firmly fastened to the C-channel steel 100.

[0050] Therefore, even if vibrations, wind pressure, external pressure, etc. are applied, the fastener 110 fastened to the upper horizontal plate 20 and the first inner horizontal plate 40 will not detach from the screw groove. Further, since the fastener 110 is firmly fastened to the screw groove, water leakage will not occur through the screw groove.

[0051] Furthermore, when vibration, wind pressure, external pressure, etc. are applied to the C-channel steel 100, the first inner horizontal plate 40 is formed with a slight gap from the side surface plate 10, so that the first inner horizontal plate 40 moves up and down, and the fastener 110 remains firmly fastened to the screw groove without being affected by external influences.

[0052] Although not illustrated in the figures, the present invention maty be configured such that in the above-described configuration of the C-channel steel 100, the first inner horizontal plate 40 can also be tightly fixed to the side surface plate 10 by welding without leaving a gap therebetween. That is, if the first inner horizontal plate 40 is welded to the side surface plate 10, the first inner horizontal plate 40 will be fixed without moving up and down even when vibration is applied thereto. However, since the upper horizontal plate 20 and the first inner horizontal plate 40 are integrated to doubly and firmly fasten the fastener 110, so that the fastener 110 will not separate or detach from the screw groove.

[0053] The configuration of the C-channel steel 100 according to yet another first embodiment of the present invention will be described in detail below with reference to FIG. 5.

[0054] The side surface plate 10 is primarily bent at its upper side to form an upper horizontal plate 20. Further, the upper horizontal plate 20 is secondarily bent toward the lower side of the upper horizontal plate 20 to form an upper vertical plate 30.

[0055] Further, the upper vertical plate 30 is thirdly bent toward its inner side to form a first inner horizontal plate 40.

[0056] Furthermore, the side surface plate 10 is primarily bent at its lower side to form a lower horizontal plate 50. Further, the lower horizontal plate 50 is secondarily bent its upper side to form a lower vertical plate 60.

[0057] With respect to the C-channel steel 100 formed as above, a first stopper groove 70 is formed on the side surface plate 10 facing the first inner horizontal plate 40. Further, the end side of the first inner horizontal plate 40 is formed to be inserted into the first stop groove 80 and movably engaged.

[0058] The main technical idea of the first embodiment of the present invention configured as above, is a configuration in which the first inner horizontal plate 40 is not formed at a gap from the side plate 10, and but the first inner horizontal plate 40 is prevented from completely moving downward due to vibration or external impact as previously described.

[0059] That is, this is a configuration in which the first inner horizontal plate 40 moves up and down only within the first stopper groove 80, thereby further enhancing the fastening strength of the fastener 110.

[0060] The configuration of the C-channel steel 100 according to another second embodiment of the present invention will be described in detail below with reference to FIG. 6.

[0061] The side surface plate 10 is primarily bent at its lower side to form an upper horizontal plate 50. Further, the upper horizontal plate 50 is secondarily bent toward the lower side of the upper horizontal plate 50 to form an upper vertical plate 30.

[0062] Then, the upper vertical plate 30 is thirdly bent toward its inner side to form a first inner horizontal plate 40.

[0063] Furthermore, the side surface plate 1010 is primarily bent at its lower side to form a lower horizontal plate 50. Further, the lower horizontal plate 50 is secondarily bent at its upper side to form a lower vertical plate 60.

[0064] With respect to the C-channel steel 100 formed as above, a first stopper groove 70 is formed on the side of the side surface plate 10 facing the first inner horizontal plate 40. The end side of the first inner horizontal plate 40 is formed to be inserted into the first stopper groove 80 and movably engaged.

[0065] Further, a second stopper groove 90 is formed on the side of the side surface plate 10 facing the second inner horizontal plate 70. The end side of the second inner horizontal plate 70 is formed to be inserted into the second stopper groove 90 and movably engaged.

[0066] The main technical idea of a second embodiment of the present invention configured as above is to form the first inner horizontal plate 40 and the second inner horizontal plate 40 on the side surface plate 10 so that the C-channel steel 100 can be easily constructed according to the arrangement of the panels 120, 130, 140 and 150 as previously described. Furthermore, the fastener 110 is configured to simultaneously fasten the panels 120, 130, 140 and 150 to the first inner horizontal plate 40 on the upper side and the second inner horizontal plate 70 on the lower side.

[0067] The configurations of the first and second embodiments of the present invention, as described above, also allow the fastener 110 to firmly fasten the panels 120, 130, 140 and 150 to the C-channel steel 100 by utilizing the aforementioned technical capabilities.

[0068] Further, referring to the construction diagrams of an embodiment of the present invention shown in FIG. 8, in addition to the application to the roof panel 120 and sandwich panel 130 described above, an embodiment of the present invention is also described for use with wall panels 140 and floor panels 150.

[0069] Although the present invention has been illustrated and described above with reference to preferred embodiments, it will be understood by those skilled in the art that the invention is not limited to the above embodiments, and various modifications and alterations can be made to the embodiments without departing from the spirit of the present invention. It is intended that the present invention encompass such modifications and alterations as fall within the scope of the appended claims.

Claims

1. A C-channel steel having enhanced fastening strength comprising:an upper horizontal plate (20) bent on the upper side of a side surface plate (10);an upper vertical plate (30) bent toward the lower side of the upper horizontal plate (20);a first inner horizontal plate (40) bent toward the inner side of the upper vertical plate (30) and formed to have a space from the side surface plate (10);a lower horizontal plate 50 bent on the lower side of the side surface plate (101); anda lower vertical plate (60) bent toward the upper side of the lower horizontal plate (50),thereby enhancing the fastening strength of the fasteners (110) when coupled to panels (120, 130, 140 and 150).

2. The C-channel steel having enhanced fastening strength according to claim 1,wherein the first inner horizontal plate (40) is tightly attached to the side surface plate (10) and integrally coupled by welding.

3. The C-channel steel having enhanced fastening strength according to claim 1, comprising:an upper horizontal plate (20) bent on the upper side of the side surface plate (10);an upper vertical plate (30) bent toward the lower side of the upper horizontal plate (20);a first inner horizontal plate (40) bent toward the inner side of the upper vertical plate (30);a lower horizontal plate (50) bent on the lower side of the side surface plate (101); anda lower vertical plate (60) bent toward the upper side of the lower horizontal plate (50),wherein a first stopper groove (70) is formed on the side of the side surface plate (10) facing the first inner horizontal plate (40), so that the end side of the first inner horizontal plate (40) is inserted into the first stopper groove (80) and movably engaged.

4. The C-channel steel having enhanced fastening strength according to claim 1, comprising:an upper horizontal plate (20) bent on the upper side of the side surface plate (10);an upper vertical plate (30) bent toward the lower side of the upper horizontal plate (20);a first inner horizontal plate (40) bent toward the inner side of the upper vertical plate (30);a lower horizontal plate (50) bent on the lower side of the side surface plate (101);a lower vertical plate (60) bent toward the upper side of the lower horizontal plate (50); anda second inner horizontal plate (70) bent toward the inner part side of the lower vertical plate (60),wherein a first stopper groove (80) is formed on the side of the side surface plate (10) facing the first inner horizontal plate (40), so that the end side of the first inner horizontal plate (40) is inserted into the first stopper groove (80) and movably engaged,wherein a second stopper groove (90) is formed on the side of the side surface plate (10) facing the second inner horizontal plate (70), so that the end side of the second inner horizontal plate (70) is inserted into the second stopper groove (90) and movably engaged.

5. The C-channel steel having enhanced fastening strength according to claim 1,wherein a fastener (110) is screw-coupled to the upper horizontal plate (20) and the first inner horizontal plate (40), thereby enhancing the fastening strength so that the fastener (110) does not detach due to vibration, wind pressure, and external pressure.

6. The C-channel steel having enhanced fastening strength according to claim 2,wherein a fastener (110) is screw-coupled to the upper horizontal plate (20) and the first inner horizontal plate (40), thereby enhancing the fastening strength so that the fastener (110) does not detach due to vibration, wind pressure, and external pressure.

7. The C-channel steel having enhanced fastening strength according to claim 3,wherein a fastener (110) is screw-coupled to the upper horizontal plate (20) and the first inner horizontal plate (40), thereby enhancing the fastening strength so that the fastener (110) does not detach due to vibration, wind pressure, and external pressure.

8. The C-channel steel having enhanced fastening strength according to claim 4,wherein a fastener (110) is screw-coupled to the upper horizontal plate (20) and the first inner horizontal plate (40), thereby enhancing the fastening strength so that the fastener (110) does not detach due to vibration, wind pressure, and external pressure.

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