Easy-to-assemble cable tray

Abstract

To provide an assemblable cable tray which is firmly connected.SOLUTION: In a cable tray 100 includes: a pair of parallel side rails 50 in which horizontal flanges 11 are orthogonally bent and formed at the top and bottom of a body 10 made of PosMAC (highly corrosion-resistant alloy plated steel) and a plurality of connection bolt wholes 12 penetrate at both ends in a longitudinal direction; and a plurality of ladders 60 made of the same PosMAC steel as the side rails are installed so as to intersect at prescribed intervals between the pair of parallel side rails. In the ladders, both ends of a vertical bent and formed on both sides orthogonally to a vertical part with a length corresponding to the width of the pair of parallel side rails are formed in a cross-sectional gate shape in which a pair of winding parts are each wound upward toward the vertical part inside to form screw holes inside and face each other so as to be separated from each other, and tap-tight bolts 30 passing through side rail piece holes are tightened by screws while cutting taps on the inside surface of screw holes.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an assembled cable tray, and more particularly to a cable tray which supports and fixes cables laid in houses, factories, ships, marine structures, etc., and which has an improved structure of a ladder which is connected to a side rail of the cable tray, thereby enabling assembly by simply connecting and fixing the side rail and ladder without using any other complicated fixing means. [Background technology]

[0002] Generally, in homes, buildings, factories, large shipyards, ships, marine structures, and other facilities, large and small cables are routed along the ceilings, floors, and walls to supply power, fluids, and the like. In order to make it easy to distinguish the various cables routed in this way and to make them functional and easy to see in appearance without causing discomfort to passersby, they are supported and fixed in an organized manner using ladder-like cable trays.

[0003] Conventional cable trays that support and fix various cables in this way are composed of a pair of side rails located on the left and right sides and having a fixed length overall, and a cross bar (hereinafter referred to as a ladder) that is connected to the side rails at a fixed distance. The side rails and ladders are connected in a variety of ways, including welding, bolting, and riveting.

[0004] The welding method has the problem that a large number of ladders must be welded at the same time, and in particular, high heat is exposed to the side rails and ladders during the welding process, reducing the strength of the cable tray, and it is difficult to ensure uniform strength because a uniform weld bead cannot be formed, and it is difficult to assemble separately due to folding. In addition, the bolt connection method has the disadvantage that it takes a long time to assemble because bolt holes must be formed or separate assembly fittings must be used to connect each piece, and the assembly may come loose when connected. The riveting method has the problem that the number of parts must be increased, requiring the purchase of separate rivets, and the riveting work takes a long time.

[0005] In addition to the above method, the ladder is made of a steel plate material with a length corresponding to the tray width, and two winding parts are formed so that both ends are circular on the inside, and there is a screw hole inside the winding part. The ladder is configured to have the following cross-sectional shape, and the bolt is fastened by screwing the bolt into the screw hole through the piece hole on the outer surface of the side rail. JPEG2025071075000002.jpg11167

[0006] However, the ladder described above has a structure in which the steel plate material is wound so that the two winding parts are in contact with each other, which is a structure that cannot be manufactured using normal machinery, and therefore is impractical and worthless. Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention is intended to solve the above problems, and is configured by forming a winding section that forms a screw hole with a structure that can be manufactured as a mechanical device inside a ladder made of highly corrosion-resistant alloy-plated steel (also known as PosMAC).The object of the present invention is to provide a cable tray that can be firmly connected with the side rails as taptite bolts without using a fixing means other than the side rails, and can be assembled at a low unit cost.

[0008] The present invention provides an assemblyable cable tray that can be more firmly joined by using tap-tight bolts to fasten the side rails and ladder to eccentric positions on both sides of the screw holes during assembly. [Means for solving the problem]

[0009] The means for achieving such an object of the present invention is a cable tray comprising a main body made of PosMAC (highly corrosion-resistant alloy-plated steel), which has high strength, high corrosion resistance and ease of processing, and horizontal flanges are bent perpendicularly at the top and bottom of the main body, a pair of parallel side rails with a plurality of connecting bolt holes at both longitudinal ends, and a plurality of ladders made of the same PosMAC steel material as the side rails, which are installed and fixed between the pair of parallel side rails at a predetermined interval, crossing each other.

[0010] The ladder has a length corresponding to the width of a pair of parallel side rails, and both ends of the vertical section bent on both sides perpendicular to the horizontal section are wound inward and upward toward the vertical section, with a cross-sectional shape as shown below in which a pair of wound sections forming screw holes inside face each other, and a taptite bolt passing through a piece hole in the side rail is screwed into the inner surface of the screw hole while cutting a screw tap. JPEG2025071075000003.jpg9167

[0011] Taptite bolts are characterized by being constructed with a diameter having an outer diameter that is larger than the inner diameter of the threaded hole.

[0012] The Taptite bolts that secure the ladder to the side rails are fastened through screw holes at offset eccentric positions on both ends of the ladder, improving bending and torsional strength.

[0013] The windings of the ladder are characterized in that they are configured in a shape that forms a circle or a square. Effect of the Invention

[0014] According to the present invention, the two corners formed by wrapping around the inside of the ladder are wrapped upward toward the inner walls on both sides of the vertical portion. The windings are constructed separately, so that the ladder can be easily fabricated on the structure using a forming machine. It has the advantage of being easy to manufacture, and when assembling it with the side rails, no separate fixing means is provided on the ladder; instead, the Taptite bolts that fasten both ends are fastened to the screw fastening holes at offset eccentric positions, which makes the connection with the side rails very strong, improves torsional strength and bending strength, and has the effect of being competitive compared to other products due to its low cost. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is an exploded perspective view of a side rail and a ladder before they are assembled according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exemplary perspective view of a completed cable tray with side rails and ladder assembled in accordance with one embodiment of the present invention. [Diagram 3] FIG. 2 is a cross-sectional view of a ladder according to one embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view of a ladder according to another embodiment of the present invention. [Diagram 5] FIG. 1 is a front view of a cable tray according to the present invention, showing a state in which cables are loaded and housed therein; [Figure 6] FIG. 2 is an enlarged partial cross-sectional view of a side rail and a ladder eccentrically fastened together using a tap-tight bolt according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, the most preferred embodiment of the present invention will be described with reference to the accompanying drawings. The following detailed description will focus on the parts necessary for understanding the operation and function of the present invention.

[0017] While describing the embodiments of the present invention, it is assumed that the reader is familiar with the technical field to which the present invention pertains, and unnecessary technical content that is not directly related to the present invention will be omitted for the purpose of clearer communication without obscuring the gist of the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0018] Fig. 1 is an exploded perspective view of a side rail and a ladder before they are assembled according to one embodiment of the present invention, Fig. 2 is an exemplary perspective view of a cable tray completed by assembling a side rail and a ladder according to one embodiment of the present invention, and Fig. 3 is a cross-sectional view of a ladder according to one embodiment of the present invention. Fig. 4 is a cross-sectional view of a ladder according to another embodiment of the present invention, Fig. 5 is a front view of a state in which a cable is placed and housed in the cable tray of the present invention, and Fig. 6 is a partially enlarged cross-sectional view of a side rail and a ladder eccentrically fastened with a tap-tight bolt according to one embodiment of the present invention.

[0019] 1 to 6, the cable tray (100) of the present invention, which is easy to assemble, has horizontal flanges (11) that cross the top and bottom of a main body (10) made of PosMAC (highly corrosion-resistant alloy-plated steel), which has high strength, high corrosion resistance, and easy processing. It is made of a pair of parallel side rails (50) that are bent and have a plurality of connecting bolt holes (12) at both ends in the longitudinal direction, and a ladder (60) made of the same PosMAC material as the side rails (50), which is installed between the pair of parallel side rails (50) at a predetermined interval and fastened with taptite bolts (30). The cable (20) is stored in a loaded state on the top of the ladder (60) as shown in FIG. 5.

[0020] A downward bent portion (11)' parallel to the main body (10) is formed at the tip of the upper horizontal flange (11) of the main body (10) that constitutes the side rail (50), reinforcing the strength of the side rail (50), preventing damage to the cable (20), and making it easier to handle.

[0021] The ladder (60) has a length corresponding to the width of a pair of parallel side rails (50), and is formed by bending a vertical portion (62) perpendicular to the horizontal portion (60) on both sides, and both end portions of the vertical portion (62) are wound upward toward the vertical portion (62) on the inside, and has a cross-sectional shape structure as shown below, in which a pair of wound portions (64) forming screw holes (63) therein are spaced apart and opposed to each other. JPEG2025071075000004.jpg9167

[0022] The ladder (60) is positioned so as to cross between the side rails (50), and the taptite bolts (30) passing through the piece holes (51) of the side rails (50) are screwed into the screw holes (63) to fasten them together.

[0023] Here, the screw holes (63) are fastened together as a screw tap is forcibly cut into the inner surface by the threads formed on the Taptite bolt (30) during the process of screwing in the Taptite bolt (30), thereby firmly connecting the side rail (50) and the ladder (60).

[0024] Therefore, in order to cut a screw tap on the inner surface of the screw hole (63), it is necessary to form the taptite bolt (30) with an outer diameter larger than the inner diameter of the screw hole (63).

[0025] The present invention, based on such a prefabricated structure, does not require a separate fastening means as in the prior art when connecting the ladder (60) to the side rails (50), so that assembly is simple, costs are reduced, and it is economical.

[0026] FIG. 3 is a cross-sectional view showing one embodiment of a ladder (60), in which a vertical section (62) is bent downward on both sides perpendicular to the horizontal section (61), and two circular wound sections (64) are formed separately, with both ends of the vertical section (62) wound inward and upward toward the vertical section (62).

[0027] A circular screw hole (63) is formed inside the circular winding portion (64) into which the taptite bolt (30) can be screwed.

[0028] In addition, during the process of forming the winding portion (64), both ends of the vertical portion (62) are naturally wound up to form a curved surface R, which prevents damage to the coating of the cable (20) and eliminates the risk of injury to the hands of the worker.

[0029] FIG. 4 shows another embodiment in which the winding sections (64) at both ends of the vertical section (62) of the ladder (60) form a square shape. In terms of manufacturing, this requires a slightly more complicated process than a structure in which a circular winding section (64) is formed. However, the winding section (64) of the ladder (60) of the present invention is wound along the inner surface of the vertical section (62) and the winding sections (64) on both sides are sufficiently separated from each other, so that it can be easily manufactured using a conventional molding machine.

[0030] FIG. 6 shows the connection structure of the side rail (50) and ladder (60) according to the present invention. The ladder (60) is arranged crosswise between a pair of parallel side rails (50). The winding portion (64) of the ladder (60) is wound upward from the tips of the vertical portions (61) on both sides toward the inside of the vertical portions (61). Since two screw holes (63) are formed, when the side rail (50) and the taptite bolt (30) are assembled, the taptite bolt (30) is tightened into the screw hole (63) formed in either of the winding sections (64) when the side rail (50) and the taptite bolt (30) are assembled, if the taptite bolt (30) is tightened so that the two screw holes (63) are eccentric, the ladder (60) is firmly fixed to the side rail (50) even if the taptite bolt (30) is not tightened into both screw holes (63).

[0031] In this manner, fastening the Taptite bolts (30) into the eccentric screw holes (63) on both sides of the side rail (50) not only provides a stronger and more solid fastening than when the Taptite bolts (30) are fastened concentrically with the fastening position offset, but also improves the bending strength and torsional strength in the vertical and horizontal directions.

[0032] The Taptite bolt (30) can be fastened into both screw holes (63), but fastening one on each side will provide sufficient connection strength, which also has the effect of reducing costs.

[0033] As described above, the tabtight bolt (30) to be fastened to the screw hole (63) is configured with an outer diameter slightly larger than the screw hole (63), and when it is fastened with strong pressure during the fastening process, a screw tap is formed on the inner surface of the screw hole (63) of the easily machined PosMAC steel material, and fastened, so that a very strong connection can be achieved without using a separate fixing means for assembly.

[0034] In this manner, according to the present invention, both ends of the vertical portion (62) of the ladder (60) are wound inwardly and upwardly to form the wound portions (64), respectively, which are formed toward the vertical portion (62) and the opposing wound portions (64) on both sides are formed facing each other with a space between them. Therefore, structurally, the wound portions (64) can be easily manufactured using a normal molding machine, which solves the problem of being impossible to implement. By eccentrically fastening the taptite bolts (30) using the two screw holes (63), it is possible to manufacture a cable tray (100) with improved torsional strength and bending strength.

[0035] Although one embodiment of the present invention has been described above, a person having ordinary knowledge in the art may modify and change the present invention in various ways, such as by adding, changing, deleting or adding components, without departing from the concept of the present invention described in the claims, and this may also be considered to be within the scope of the claims of the present invention. [Explanation of symbols]

[0036] 100: Cable tray 10: Main body 11: Horizontal flange 11': Downward bend 12: Bolt hole 20: Cable 30: Taptite bolt 50: Side rail 51: Piece hole 60: Ladder 61: Horizontal section 62: Vertical section 63: Screw hole 64: Winding section R: Curved surface

Claims

1. A cable tray is provided comprising a pair of parallel side rails, each of which is made of the same PosMAC steel material as the side rails, and is arranged to cross the pair of parallel side rails at a predetermined interval, with horizontal flanges bent perpendicularly to the top and bottom of the main body, the pair of side rails being formed with a main body made of PosMAC (high corrosion resistant alloy plated steel material) having high strength, high corrosion resistance and workability, and a plurality of connecting bolt holes passing through the main body at both ends in the longitudinal direction. The cable tray is provided with a plurality of ladders, each of which is made of the same PosMAC steel material as the side rails and is arranged to cross the pair of parallel side rails at a predetermined interval, the ladders having a length corresponding to the width of the pair of parallel side rails, and each of which is formed by bending the vertical parts on both sides so as to be perpendicular to the horizontal parts, and each of which is wound upward toward the vertical parts, forming a pair of wound parts facing each other at a distance, the pair of wound parts being wound upward toward the vertical parts ... A cable tray that is easy to assemble, characterized in that a taptite bolt passing through a piece hole of the side rail is screwed to the inner peripheral surface of the screw fastening hole while a threaded tap is cut.

2. 2. The easy to assemble cable tray of claim 1, wherein the taptite bolt is configured with a diameter having an outer diameter larger than an inner diameter of the threaded hole.

3. The cable tray that is easy to assemble as described in claim 1, characterized in that the taptite bolts that fix the ladder to the side rails are fastened to the screw holes at offset eccentric positions on both side ends of the ladder, thereby improving bending strength and torsional strength.

4. 2. The cable tray according to claim 1, wherein the winding portion of the ladder is configured to form a circular or rectangular shape.

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