KR101286606B1 - Cable tray and method thereof - Google Patents

Abstract

PURPOSE: A cable tray and a manufacturing method of the same are provided to draw a support bracket to a side rail through a fastening bolt fixed on the side rail, thereby firmly combining the side rail and the rung. CONSTITUTION: A fixing bracket (20) includes a pair of clamping boards facing each other by being separated. A rung (10) is positioned between a pair of side rails (30). The rung includes a support bracket positioned between the clamping boards. A fastening bolt (40) is fixed on the side rail. The fastening bolt is combined to each of the clamping boards by being screwed in order to draw the support bracket to the side rail.

Description

Cable tray and manufacturing method thereof

The present invention relates to a cable tray, and more particularly to a cable tray for coupling the side rail and the rung using a bolt and a method of manufacturing the same.

Typically, telecommunications cables are placed on cable trays to lay cables on the walls or ceilings of buildings. The cable tray has a structure in which several rungs are arranged between the side rails on both sides, and the rungs and side rails are welded in order to prevent a safety accident, especially in high-altitude work, when the worker steps on it during laying work. Combine firmly. By the way, the welding operation requires a separate welding device, there is a problem that the work efficiency is low, and the work time takes a lot. Accordingly, unlike welding, measures for preventing a safety accident of an operator are being researched by making a fastening and a fastening at the same time more easily in the field. In particular, the present applicant has proposed a method of assembling the cable tray to simply fasten the bolt between the side rail and the rung through a bracket between the Republic of Korea Patent Publication No. 10-2008-0109982. In addition, the Republic of Korea Patent No. 686618 has been presented as another example of fastening the rung with the side rails through the bracket using a bolt.

However, according to the prior art, there is an advantage that the field construction can be easily performed compared to welding by using the screw coupling of the fastening bolt through the bracket, but the manufacturing cost increases due to the complexity of the bracket and the high labor, and also the fastening simply. Only bolts were used as a means to secure the side rails and rungs.

The present invention has been made to solve the above problems, the object of the present invention is to provide a way to more securely combine the side rail and the rung using a fastening bolt.

Cable tray according to the present invention for achieving the above object, a fixing bracket having a pair of fastening plates facing each other spaced from each other, a support bracket disposed between the pair of fastening plates and provided on the rung, and And fastening bolts fixed to the side rails and screwed with the pair of fastening plates, respectively, to allow the support bracket to be pulled toward the side rails.

In the cable tray according to the present invention, the fixing bracket may be integrally coupled with the support bracket, and may be manufactured so that its cross-sectional shape is c-shaped.

In the cable tray according to the present invention, the support bracket may be provided between a pair of cutouts spaced apart from each other.

Furthermore, in a cable tray as a preferred embodiment according to the present invention, the support bracket is formed in a recessed shape, the pair of fasteners are fitted into the pair of cutouts protrude, the pair of tightening The plate is formed with a screw hole, and the side rail may be formed with a through hole to accommodate the fastening bolt.

According to another aspect of the present invention, a method of manufacturing a cable tray includes providing a pair of cutouts spaced apart from each other at both ends of the rung, and fixing brackets having a pair of fastening plates integrally connected to each other at both ends of the rung. Inserting the cutouts respectively formed in the cutouts, arranging a pair of side rails with the rungs interposed therebetween, and pulling the rungs between the spaced pair of cutouts toward the side rails; It characterized in that it comprises a step of fixing each of the pair of tightening plate and the side rail with a fastening bolt.

And, in the cable tray manufacturing method according to another aspect of the present invention, the step of fixing the fixing bracket integrally to the rung, and forming a screw hole so as to be screwed to the fastening bolt and the pair of fastening plates, respectively It is preferable to further include.

According to such a configuration, by pulling the support bracket by the fastening bolt to the side rail can be more firmly coupled to the side rail and the rung, by simply bending a band-shaped plate of the fastening bracket according to the present invention simply and quickly The fastening bolts can be quickly and easily combined to reduce manufacturing and work man-hours and reduce manufacturing costs and operating costs.

1 is a perspective view showing the combination of the fixing bracket and the rung according to the present invention,
2 is a cross-sectional view taken along the line AA of FIG.
3 is a perspective view showing the separation of the fixing bracket and the rung according to the present invention,
4 is an external perspective view showing an enlarged portion A of FIG. 3;
5 is a cross-sectional view showing a rung integrated with a fixing bracket according to the present invention;
Figure 6 is an external perspective view showing the side rail of one side separated in the cable tray according to the present invention,
7 is a perspective view showing the cable tray coupled to the rung and the fixing bracket according to the present invention,
Figure 8a is shown to show a step-by-step process of coupling the rung and side rails with a fastening bolt in accordance with the present invention, is a cross-sectional view showing a state before the fastening bolts,
Figure 8b is a cross-sectional view showing a state in which one fastening plate and the fastening bolt is screwed,
8C is a cross-sectional view illustrating a state in which a pair of fastening plates and fastening bolts are respectively screwed together;
8D is a cross-sectional view showing a cable tray as an example according to the present invention combining the rung and the side rails with fastening bolts, and
9 is a cross-sectional view illustrating a cable tray in which a rung and side rails of which a fixing bracket and a support bracket are integrally coupled with fastening bolts as another example in the cable tray according to the present invention.

With respect to the cable tray manufacturing method according to the present invention will be described in more detail with reference to the accompanying drawings. In addition, the side rail and the rung according to the present invention may have a variety of shapes and structures in the field of the present invention, the cross-sectional shape of "c" by using a galvanized steel sheet and roll forming machine generally used and known in the field of the present invention The side rails and the rung formed by molding, cutting to a certain length according to the order or need, and molded into a press mold will be described as an example.

1 is an external perspective view showing the fixing bracket and the rung according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. 1.

1 and 2, the rung 10 according to the present invention is combined with a pair of side rails 30 (see FIG. 6) to form a cable tray 1 (see FIG. 6), and a cable is placed thereon. It includes a main body 11 to be placed, and support brackets 13 provided at both ends of the main body 11. A fixing bracket 20 is disposed on the support bracket 13, and the support bracket 13 is held toward the side rails 30 (see FIG. 6) by the fixing bracket 20 and the fastening bolt 40 (see FIG. 6). To be pulled. In the cable tray according to the present invention, the support bracket 13 and the fixing bracket 20 are provided, and the support bracket 13 and the fixing bracket 20 may be physically or structurally coupled by various methods. For example, it may be physically integrated so as not to be detachable such as welding or riveting, and may be detachable by fitting or screwing, but the structurally connected brackets 20 and the support brackets 13 are structurally connected to each other. It may be.

3 is an external perspective view showing the fixing bracket and the rung separated according to the present invention, and FIG. 4 is an enlarged external perspective view showing part A of FIG. 3.

3 and 4, a pair of cutouts (11a, 11b) spaced apart from each other on each end of the rung 10 according to the present invention, a pair of cutouts (11a) as shown Step 11b) to form a stepped support bracket 13 in a recessed shape. The support bracket 13 is preferably recessed by a press die or the like, and when the support bracket 13 is recessed in this manner, when the fixing bracket 20 is mounted to the support bracket 13 As it does not protrude to the upper surface of the rung 10, it is aesthetically beneficial and also does not take a worker's cable laying work can prevent safety accidents. On the other hand, the cutouts (11a, 11b) and the support brackets 13 are provided in each of the both ends of the rung 10 in the orient (only), but only their position is different from each other in order to avoid explanation and overlapping one pair The cutouts 11a and 11b will be described below. In addition, the cutouts 11a and 11b and the support bracket 13 may have various shapes and structures, and may be easily molded according to methods known in the art, such as a press die.

3 and 4, the fixing bracket 20 is provided with a pair of fastening plates 21 and 23 facing each other apart from each other. The pair of fastening plates 21 and 23 are connected by a seating plate 25 therebetween, and as shown in the illustrated example, the fixing bracket 20 is a fastening plate 21 and 23 and a seating plate 25. This unity forms an overall "C" cross-sectional shape. In addition, the screw holes 21a and 23a are formed in the pair of tightening plates 21 and 23, respectively, and the distance between the pair of tightening plates 21 and 23 or the width of the seating plate 25 is a rung ( It corresponds to the distance between the pair of cutouts 11a and 11b provided in 10) or the width of the support bracket 13. Here, the screw holes (21a, 23a) is a hole in which the fastening bolt 40 (see Fig. 6) can be received and screwed, the tapping screw of various shapes as known in the art of the present invention is When used as a fastening bolt 40 according to the above, the tapping screw may be screwed with the tightening plates 21 and 23 while the female thread is made while screwing the screw holes 21a and 23a. However, as will be described later with reference to FIG. 8, the support bracket 13 is reduced as the fastening bolt is tightened along the thread formed in the threaded hole of the fastening plates 21 and 23, as described later. In order to be more effectively pulled out, it is preferable to form a female screw in the screw holes of the fastening plates 21 and 23 in advance using a tapping machine. In addition, if the fixing bracket 20 also uses a press mold, for example, the galvanized steel sheet may be easily and quickly formed into a cross-sectional shape of a letter “c”. On the other hand, reference numeral "11c" not described in FIG. 4 represents a contact surface in contact with the side rail.

1, 2 and 4, a pair of fastening plates 21 and 23 are fitted into the pair of cutouts 11a and 11b and the mounting plate 25 is attached to the support bracket 13. When positioned, the pair of tightening plates 21 and 23 are protruded downward from the rung 10, and the support bracket 13 is disposed between the pair of tightening plates 21 and 23, thereby fixing the bracket. (20) is in a state wrapped around the support bracket (13). In addition, in the state where the support bracket 13 is disposed between the pair of fastening plates 21 and 23, various implementations may be performed such that the support bracket 13 may be pulled toward the side rail 30 by the fastening bolt 40. For example, the support bracket 13 may be disposed between the pair of fastening plates 21 and 23 to allow structural interaction, but the fixing bracket 20 and the support bracket 13 may be physically joined. In order to interact with each other by fixing integrally, it will be described with reference to FIG.

5 is a cross-sectional view showing an example of the fixing bracket according to the present invention integrated with the rung. Here, the same reference numerals as the drawings shown above means the same member having the same function.

Referring to FIG. 5, the support brackets 113 are disposed between the pair of fastening plates 21 and 23, and are integrally bonded to each other in a state in which the mounting plate 125 is overlapped on the support brackets 113. As shown, the mutual bonding of the support bracket 113 and the seating plate 125 may be made by various methods known in the art, and as an example thereof, as disclosed in Korean Patent Registration No. 20-0352251. By pressing the set dies together using a press die provided with a punch or a die, plastic deformation can be induced to join each other. Although the illustrated example uses a press die as an example, it may also be integrally combined by spot welding or riveting. As shown in the illustrated example, when the support bracket 113 and the fixing bracket 20 are integrally fixed so as not to flow, a tapping process for forming a female screw in the screw holes 21a and 23a of the seating plates 21 and 23. It is useful because the female thread can be formed more easily while integrally supporting the rung 10. In addition, the two screw holes 21a and 23a are machined so as to be located on the same line without shifting each other. It is desirable to be able to achieve a precise screw coupling and to be able to pull the support bracket 113 more tightly.

6 is an external perspective view showing the side rails of one side of the cable tray according to the present invention, and FIG. 7 is an external perspective view of the cable tray coupled by the rung and the fixing bracket according to the present invention.

Referring to FIG. 6, a fixing bracket 20 is disposed on the rung 10 according to the present invention, and a pair of side rails 30 are positioned at both ends of the rung 10. The side rails 30 may be formed in various shapes and structures in the field of the present invention, as disclosed in the Republic of Korea Patent Publication No. 10-2010-0086270 of the applicant, the first connection portion having an extended height on one side ( 31 may be provided and the second connection part 33 may be provided on the other side thereof. The recess 31a protrudes in a shape recessed in the first connector 31 by a press die or the like, and the convex portion 33a protrudes in the second connector 33, and the first connector 31 is provided. If the bolt holes 31b and 33b are provided in the and second connection portions 33, respectively, the convex portion 33a is positioned in the recess 31a between the adjacent side rails 30, and the bolt holes 31b and 33b are provided. When fastened with a connecting bolt (not shown) to the cable tray (1) can be continuously disposed is easy. The side rail 30 has a through hole 30a formed therein so that the fastening bolt 40 can be accommodated, and accordingly, a rung having a fixing bracket 20 between the pair of side rails 30 is provided. 10) and the through holes 30a and the screw holes 21a and 23a are aligned so as to be in the same line, respectively, and then the side rails 30 and the rung 10 are coupled with the fastening bolts 40 to the present invention. The cable tray 1 according to this is completed. In addition, the cable tray 1 according to the present invention is arranged in a cable construction position, such as a combination of several, the cable on the rung 10 between the pair of side rails 30 as shown in FIG. Lay cables in the building and so on (C).

8 is a step to show the process of coupling the rung and side rails with the fastening bolt according to the present invention, Figure 8a is a cross-sectional view showing a state before the coupling with the fastening bolt, Figure 8b and Figure 8c is a cross-sectional view showing a state in which the fastening bolt screwed, Figure 8c is a cross-sectional view showing a state in which a pair of fastening plate and the fastening bolt is screwed, respectively, and Figure 8d is a present invention in which the rung and side rails are coupled with the fastening bolt It is sectional drawing which shows the cable tray. Here, the illustrated example shows a cable tray as an example according to the present invention in which a support bracket is disposed between a pair of fastening plates, and as another example in which the support bracket and the fixing bracket are integrally coupled, the cable tray is illustrated in FIG. 9. Illustrated.

Referring to FIG. 8A, the through holes 30a of the side rails 30 and the screw holes 21a and 23a of the fastening plates 21 and 23 are positioned on the same line, and the fastening bolt 40 and the fastening plate ( The same screw thread is formed in the screw hole 21a, 23a of the 21 and 23 by the same pitch p. In addition, the pair of fastening plates 21 and 23 face each other at a distance L equal to the width of the support bracket 13.

Referring to FIG. 8B, as the fastening bolt 40 passes through the through hole 30a of the side rail 30 and rotates in the right direction R, the first fastening plate 21 is translated in the forward direction S. Screwed into the screw hole (21a) of the screw and screwed into the screw hole (23a) of the second tightening plate (23) while continuing to tighten.

Referring to FIG. 8C, as the fastening bolt 40 continues to be tightened, the screw head 41 of the fastening bolt 40 is rotated by the side rails (R) and translation (S) movement of the fastening bolt 40. 30 and the contact surfaces 11c (see FIG. 4) at both ends of the rung 10 are in contact with the side rails 30.

Referring to FIG. 8D, the fastening bolt 40 is tightened as the fastening bolt 40 is screwed in the rotation (R) and translation (S) movements with the side rails 30 between the screw head 41 and the contact surface 11c of the rung. Continue tightening into plates 21 and 23. At this time, the two fastening plates 21 and 23 are arranged in pairs in front and rear, and the threaded holes are formed at the same pitch p in the screw holes 21a and 23a of the two fastening plates 21 and 23. Since they cannot move independently of one another, they move together when one moves and the distance L between the pair of fasteners 21 and 23 is also kept constant. Thus, for example, when one tightening plate 21 moves by 1/4 lead, the other tightening plate 23 also moves by 1/4 lead. Therefore, when moving, for example, by 1/4 lead, according to the rotation of the fastening bolt 40, the pair of tightening plates 21, 23 also move by 1/4 lead, and the support between the tightening plates 21, 23 is supported. The bracket 13 also moves to the side rail side at a distance corresponding to the quarter lead (see arrow "T"). Thus, the contact surface 11c at both ends of the rung 10 is abutted on the side of the side rail 30. In this case, as the fastening bolt 40 is screwed and the tightening plate 23 is tightened, the support bracket 13 is pulled to the side rail 30 side, and the side rail 30 and the rung 10 have a large force. While tightly coupled to the bond. In addition, the cable tray 1 according to the present invention can be moved as long as the fastening plates 21 and 23 cannot move individually and are not released from the fastening bolt 40 together with the other fastening plates 21 and 23. Therefore, it is more secure because the firm tightening force can be maintained continuously, and the firm tightening force can be maintained even if external force or impact is applied by the operator, such as on-site construction or cable laying after construction. Furthermore, in the unitary fixing bracket 20, the pair of fastening plates 21 and 23 are separated from each other by a constant distance L while the fastening bolt 40 and the large by the reaction of the support bracket 13 therebetween. Since each screw is coupled to the friction force more closely complementary acts even when the operator works on the cable tray (1) according to the present invention when laying the cable is beneficial to reduce the safety accident.

9 is a cross-sectional view illustrating a cable tray in which a rung and side rails of which a fixing bracket and a support bracket are integrally coupled with fastening bolts as another example in the cable tray according to the present invention. Here, the same reference numerals as the drawings shown above means the same member having the same function.

Referring to FIG. 9, the rung 10 as shown and described with reference to FIG. 5 is coupled to the side rails 30 by fastening bolts. In the cable tray 100 according to the present invention illustrated in FIGS. 8A to 8D, a support bracket 113 is disposed between a pair of fastening plates 21 and 23, and the support bracket 113 is fastened by a fastening bolt 40. ), The rung 10 and the side rails 30 are coupled to each other while being pulled toward the side rails 30, and as another example according to the present invention as shown in FIG. 9, the cable tray 100 is tightened in a pair. A support bracket 113 is disposed between the plates 21, 23, and the seating plate 125 and the support bracket 113 are physically integrally bonded to each other as described with reference to FIG. 5 to fix the bracket 20. ) And the support bracket 113 is different from each other that the point is integral with each other. In addition, the cable tray 100 as shown in FIG. 9 is also coupled to the rung 10 and the side rails 30 by the fastening bolts 40 as described with reference to FIGS. 8A to 8D. The same, and detailed description thereof will be omitted in order to avoid duplication of the following description.

As described above, the cable tray (1,100) according to the present invention has been shown and described in more detail and in detail through the accompanying drawings, there may be a number of examples of changing the shape or structure or changing the same function with equivalent results. Is too obvious to those skilled in the art. For example, the fixing bracket 20 and the supporting bracket 13 may be separated from each other, or may be structurally fitted to each other by changing their dimensions or changing their structure, or may be physically joined by welding or other plastic working. It can also be made into an integral part. In addition, the fixing bracket 20 may have a variety of shapes, such as not only a "c" shape but also a "U" shape or a "ㅌ" shape, and the support brackets 13 and 113 may be pulled toward the side rails 30. In the fixing bracket 20 to make a pair of tightening plates 21, 23, as well as three or more, or the shape can be changed in various ways. Various modifications according to the technical spirit of the present invention intending to firmly couple the rung 10 and the side rails 30 by arranging the support brackets 13 and 113 between the 21 and 23 and pulling them by the fastening bolts 40. There may be an example. Therefore, since the cable tray according to the present invention can be variously changed and modified as described above is too obvious to those skilled in the art, the technical scope of the present invention is illustrated and described according to the present invention It should be clearly understood that the invention should not be construed as limited thereto but only as defined by the appended claims.

1, 100: cable tray 10: rung
11a, 11b: incision 13, 113: support bracket
20: fixing bracket 21. 23: captive plate
21a, 23a: screw hole 25, 125: seating plate
30: side rail 40: fastening bolt

Claims (7)

In a cable tray with a rung coupled between a pair of side rails:
A fixing bracket having a pair of fastening plates facing each other apart from each other;
A support bracket disposed between the pair of tightening plates and provided on the rung; And
And fastening bolts fixed to the side rails and screwed to the pair of fastening plates, respectively, so that the support brackets can be pulled toward the side rails. The method of claim 1,
The fixing bracket, the cable tray, characterized in that integrally coupled with the support bracket. The method of claim 1,
The support bracket is a cable tray, characterized in that provided between a pair of incisions spaced apart from each other. The method of claim 3,
The support bracket has a shape recessed in an incision;
The pair of fasteners are fitted into the pair of cutouts to protrude;
Screw holes are formed in the pair of fastening plates, respectively; And
Cable tray, characterized in that the through-hole is formed in the side rail to accommodate the fastening bolt. The method of claim 1,
The cable tray, characterized in that the fixing bracket has a U-shaped cross-sectional shape. In a method of manufacturing a cable tray that engages a rung between a pair of side rails:
Providing a pair of cutouts spaced apart from each other at both ends of the rung;
Inserting fixing brackets having a pair of fastening plates integrally connected to each other, respectively, at cutouts formed at both ends of the rung;
Disposing a pair of side rails between the rungs; And
And fixing the pair of fastening plates and the side rails with fastening bolts so as to pull the rungs between the spaced pair of cutouts toward the side rails, respectively. . The method according to claim 6,
Fixing the fixing bracket integrally to the rung; And
The method of claim 1, further comprising: forming a screw hole so as to be screwed to the fastening bolt and the pair of fastening plates, respectively.

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