KR101958153B1 - Rung for cable tray and cable tray comprising the rung - Google Patents

Abstract

According to an embodiment of the present invention, the present invention relates to a rung for a cable tray which is arranged between side rails and maintains a space between the side rails. The rung for a cable tray comprises: a body unit forming a body; and an extension unit formed to be extended to protrude from both sides of the body unit to the outside direction, wherein the body unit is formed with an end-part insertion hole having a size to which an end part of the extension unit can be inserted, and the extension unit is formed with a first coupling hole and a second coupling hole which are arranged to be separated from each other.

Description

A cable tray comprising a cable tray, a cable tray including the rung,

The present invention relates to a cable tray rung and a cable tray including the rung.

Generally, large and small diameter cables are arranged along the ceiling, floor, or wall for supplying power supply, fluid, etc. to factories, ships and offshore structures. The cable thus arranged is fixed in a state of being arranged using a cable tray so as not to disturb aesthetics or passers-by.

Conventional cable trays for supporting and fixing such various cables are generally composed of a pair of side frames each having a largely constant length and located at left and right sides and a rung connected at regular intervals between side frames.

In addition, the joining method between the side frame and the rungs is variously adopted such as a welding method, a fitting method, and an aluminum pressing method.

There is a problem that it is difficult to achieve uniformity of the strength because it is difficult to uniformly weld the steel wire because the welding part is so narrow that the steel wire must be subjected to a complicated process such as hot dip galvanizing in consideration of corrosion resistance of the welding part.

If the slag generated due to the welding can not be completely removed, there is a problem that the slab of the cable comes into contact with the cable laid on the rung by the remaining slag, thereby peeling off the coating of the cable, thereby causing a risk of fire.

In addition, in the case of the fitting method, mass production can not be carried out, resulting in a problem that the manufacturing cost increases, and the weight of the cable can not be supported.

In order to solve such a problem, a cable tray has been disclosed in which a side rail and a rung are connected to each other by bolts when assembling a rung (cross bar).

(Patent Document 1) KR10-1286606 B

However, according to the related art, there is a need for a separate structure, such as a fixing bracket, for connecting the rungs to the side rails, and the fixing brackets of the related art must have a pair of fastening plates facing each other.

There is a problem that the manufacturing cost is still low because the fixing bracket having such a complicated configuration must be separately provided and the connection is made through the fixing bracket, and the bonding force is still low due to the existence of the intermediate structure.

The present invention relates to a cable tray which is manufactured by bending a part of a crossbar, that is, a rung structure, so as to serve as a double wall when engaged with a side rail, thereby achieving a rigid connection, We would like to propose a cable tray that includes that rung.

The rung of the cable tray according to the present embodiment is a cable run rung which is disposed between the side rails and maintains a space between the side rails. The rung has a body part forming a body, Wherein the body portion is formed with an end insertion hole having a size such that the end portion of the extension portion can be inserted therein, and the extension portion is provided with a first fastening hole And a second fastening hole are formed.

The cable tray includes a plurality of side rails, an inner engaging portion coupled to the inner side of the side rails, an outer engaging portion coupled to the outer side of the side rails, Wherein the rung includes a body portion forming a body and an extension portion extending from both sides of the body portion so as to protrude outwardly, and the body portion is provided with an end portion of the extension portion A first fastening hole and a second fastening hole are formed in the extended portion so as to be spaced apart from each other by a predetermined distance, and an end of the extended portion is inserted into the end insertion hole A bolt hole is formed in the side rail so that a fastening bolt is inserted into the first fastening hole and the second fastening hole.

The runway and the cable tray of the present invention can greatly reduce the production cost of the rung and can securely connect the side rail and the rung without a separate joining member such as a bracket.

1 is a perspective view showing the construction of a cable tray according to the present invention;
2 is a side view of a cable tray according to the present invention;
3 is a perspective view showing a rung according to the first embodiment of the present invention;
4 is a view sequentially showing a state in which an extension of a rung according to the first embodiment of the present invention is bent and inserted into an end insertion hole
5 is a cross-sectional view, a top view, and a side view of a rung according to a first embodiment of the present invention;
6 is a sectional view showing a state where the rung according to the first embodiment of the present invention is coupled to the side rail
7 is a view sequentially showing a state in which an extension of the rung according to the second embodiment of the present invention is bent and inserted into the end insertion hole
8 is a sectional view and a perspective view of a rung according to a second embodiment of the present invention;
9 is a sectional view showing a state where the rung according to the second embodiment of the present invention is coupled to the side rail
10 is a perspective view showing a rung according to a third embodiment of the present invention;
11 is a view sequentially showing a state in which an extension of a rung according to a third embodiment of the present invention is bent and inserted into an end insertion hole
12 is a top view and cross-sectional view of a rung according to a third embodiment of the present invention;
13 is a sectional view showing a state where the rung according to the third embodiment of the present invention is coupled to the side rail

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

FIG. 1 is a perspective view showing the construction of a cable tray according to the present invention, and FIG. 2 is a side view of a cable tray according to the present invention.

1, the connection between the first side rail 1 and the second side rail 2 which are in contact with each other is made by an inner coupling part 100 and an outer coupling part 200, A rung 300 is used as a member for connecting the third side rail 3 provided with the first side rail 1 and the predetermined space (space for arranging cables or the like) to the first side rail 1 .

At this time, according to the present invention, there is disclosed a configuration for allowing a crossbar or a rung for connection between side rails arranged to be parallel to each other to be more easily coupled to respective side rails.

At least one bolt hole is formed in each of the side rails for the rung connection. Unlike the conventional technique, according to the present invention, the coupling between the side rail 1 and the rung 300 can be sufficiently achieved by the bolt, and a separate bracket-like structure need not be interposed.

A bolt hole for coupling the rung 300 according to the present invention is formed in the side rail 1 and the bolt 30 is fastened to the bolt hole of the side rail 1. [

The structure of the rung 300 according to the present embodiment and the structure in which the double wall is formed so as to be firmly engaged when the coupling bolt 30 is fastened will be described later with reference to the accompanying drawings.

The side rails, which are in contact with each other like the first side rails 1 and the second side rails 2 and which are engaged by the inside fastening portions and the outside fastening portions, are referred to as side rails arranged in the same line, It can be said to be disposed side rails. The third and fourth side rails 3 and 4 arranged to be spaced apart by a predetermined distance by the rungs 300 are arranged side by side with respect to the first and second side rails 1 and 2, It can be called rail. In the following description, specific embodiments of the present invention will be described using the terms defined above.

First, according to an embodiment of the present invention, a structure is described in which a side rail disposed in a straight line or in the same direction is coupled using an outer side coupling portion and an inner side coupling portion.

The cable tray of the present embodiment includes a plurality of side rails 1, 2, 3, 4 and an inner coupling part 100 and an outer coupling part 200 as means for connecting the side rails.

As described above, the first side rail 1 and the second side rail 3, which are coupled by the rungs 300 and arranged in the same or the same direction, are provided between the first side rail 1 and the third side rail 3, The rail 2 is joined by the inner fastening part 100 and the outer fastening part 200.

The inner fastening part 100 is disposed on the inner circumferential surface of the side rail and the outer fastening part 200 is disposed on the outer circumferential surface of the side rail and is fastened to the connector exposed through the hole formed in the side rail.

These structures can be made of hot-dip galvanized steel sheets or stainless steel materials. In the high-humidity environment of the building, the cross-sectional areas of the parts should be excellent in corrosion resistance. For this purpose, zinc, magnesium, and aluminum Alloy-coated steel sheet.

Since the length and the route of cables installed in a space such as a building or a tunnel are not constant, the cable tray is produced by being divided into unit members having a predetermined size such as a plurality of side rails 1, 2, 3, , The unit members are connected to each other according to the length or route of the cable.

The cable tray must be made to have a rigidity that can withstand the load of the cable above all. If the entire cable tray is made in the form of a flat plate, not only a large amount of material is consumed in making the cable tray, It is difficult to adhere to the ceiling, which is undesirable. Accordingly, in the present invention, both side walls of the cable tray are formed of a plurality of side rails (1, 2, 3, 4) in the form of a rectangular plate, and the bottoms of the cable trays are spaced apart from each other by a predetermined distance, And a rung 300 connected to the rung 300.

FIG. 3 is a perspective view showing a rung according to a first embodiment of the present invention, and FIG. 4 is a view sequentially showing an extended portion of a rung according to the first embodiment of the present invention is bent and inserted into an end insertion hole.

3 and 4, the rung 300 of the first embodiment is interposed between the side rails to be arranged in parallel, and includes a body 301 extending a predetermined length, 301 and a second extension 320 formed to extend outward from both sides of the first extension portion 310 and the second extension portion 320.

The first and second end insertion holes 330 and 340 are formed in the body 301 so that the extension portion 313 can be inserted and fixed by the bending of the first and second extension portions 310 and 320. [ do.

In detail, the body part 301 may include first and second side parts 302 and 303 along a longitudinal direction so as to have a substantially 'C' shape, and the first side part 302 may include the body part 301 And the second side portion 303 may be perpendicular to the first side portion 302 and may be bent.

Extensions 310 and 320 extending outwardly of a predetermined length are formed on both sides of the body 301. In the following description, the extension portion 310 is simply referred to as a first extension portion and a second extension portion.

The extension portion 310 is formed to protrude outward on the same height line with a width smaller than the width of the body portion 301. At least two protrusions 314 are formed on the end portion 313 of the extension portion 310, Can be formed.

The length of the extension 310 is determined by the positions of the first and second fastening holes 311 and 312 and the position of the end 313 of the extension 310 and the position of the end insertion hole 330 ) Is determined in consideration of the position.

3, the end portion 313 of the extending portion 310 may be formed by bending the extending portion 310 such that the end portion 313 of the extending portion 310 is connected to the end portion 313 formed on the body portion And a double wall provided with a first fastening hole 311 and a second fastening hole 312 by being coupled to the insertion hole 330. The first fastening hole 311 and the second fastening hole 312 are formed to have the same hole size because one fastening bolt is engaged.

As shown in FIG. 4, the end 313 of the extension 310 may be coupled to the end insertion hole 330 at the factory to be transported to the field, or may be easily coupled by an operator in the field.

Since the body 301 includes the upper surface and both side surfaces 302 and 303 and the lower surface is at least partially opened, the first and second fastening holes 311 and 311, (312) are positioned on the same height line as each other. That is, the end portion 313 of the extension portion 310 is inserted into the end insertion hole 330 while bending the extension portion 310.

A tapered portion bent at a predetermined angle may be formed at a position formed in the end insertion hole 330 in the body 301 so as to facilitate the insertion of the end of the extension portion. The tapered portion may be formed such that a part of the body 301 has an inclined surface at a predetermined angle, and may be formed to be symmetrical with respect to both ends of the end insertion hole 330.

At this time, the first fastening hole 311 and the second fastening hole 312 formed in the extended portion 310 are placed on the same horizontal line, so that the single fastening bolt inserted later becomes the first fastening hole 311 and the second fastening hole 312 So that it can pass through both of the second fastening holes 312.

The bending of the extension portion is bent three times in the case of Fig. 4, which indicates that bending is performed at three different positions in the extension portion. On the other hand, in the case of another embodiment to be described later, when the extension portion is bent with a predetermined curvature, most of the extension portion can be seen to be bent with a predetermined curvature.

5 is a sectional view, a top view, and a side view of a rung according to a first embodiment of the present invention. FIG. 5A is a cross-sectional view taken along the line A-A 'in FIG. 4, and shows a cross-section of the end insertion hole 330 with the end portion of the extension 310 inserted. The protrusion 314 is formed on the protrusion 310 so as to correspond to the length of the protrusion 315. The protrusion 314 protrudes to the upper portion of the end insertion hole 330, . The projecting portion 314 can be expanded to both outer sides through a press-in caulking method of a riveting method, and can be fixed so as not to move in the end insertion hole 330.

FIG. 5 (b) is a top view of the rung according to the first embodiment viewed from above, and FIG. 5 (c) is a side view as viewed from the side. The first side portion 302 and the second side portion 303 which are connected to the body 301 and form the side wall are bent at a bent portion 315 so as to prevent the extended portion 310, Can be formed. The bent portion 315 may be formed at a position corresponding to the transverse length of the extended portion 310 and may be formed at a position contacting the extended portion 315 so as to prevent the bent extended portion 310 from moving in the right- And can be press-fitted caulked inward. Accordingly, the extension portion 310 can be fixed in close contact with the bending portion 315 in the vertical direction.

(c), a bending portion 316 may be formed at an end portion of the side portion 302, which is in contact with the corner portion of the side rail. When the rung is assembled to the side rail, The rungs can be easily assembled.

The first and second fastening holes 311 and 312 are formed at the same height so that when the end portion 313 of the extended portion is inserted into the end insertion hole 330, The positions of the second fastening holes 311 and the second fastening holes 312 are determined.

Consequently, by the operation of bending the protruding extensions on both sides of the rung, the rung 300 has a double wall. That is, in the state where the bending operation of the extended portion is completed, the second fastening hole 312 located on the outer side of the first fastening hole 311 in the extended portion 310 is located inside the body portion 301, The first fastening hole 311 is located outside.

Referring to FIG. 6, the first fastening hole 311 and the second fastening hole 312 are formed at the same height through bending, and the fastening bolt The second fastening hole 312 passes through the first fastening hole 311 when the first fastening hole 30 is coupled.

In addition, a double wall is formed by the angular portions formed by the first fastening hole 311 and the second fastening hole 312, and the coupling is made through the side rail 1 and the fastening bolt 30 A firmer bond can be achieved. That is, since the fastening bolts 30 are coupled to two places of the rungs 300, the coupling between the rungs 300 and the side rails 1 is made more tightly.

7 and 8 are views showing a configuration of a rung according to a second embodiment of the present invention. FIG. 7 is a plan view of a rung according to a second embodiment of the present invention, 8 is a sectional view and a perspective view of a rung according to a second embodiment of the present invention.

The second embodiment differs from the first embodiment in that a stopper 450 is formed between the second side surface portion 403 and the bent extension portion 410, . In the first embodiment, the press-fitting of the side portion is performed to fix the upper and lower portions of the bent stopper, but the second embodiment solves this problem by disposing the stopper 450 on the side portion.

The stopper 450 may be coupled to the inside of the first side portion 402 and may be positioned so as to contact the lower surface of the extended portion 410, which is preferably bent. The stopper 450 may be formed at an edge portion of the extension 410 so that the extension 410 can be fixed so as not to move vertically and horizontally.

the cutting portion 402a may be formed at an end portion of the side portion 402 which is in contact with the corner portion of the side rail and is not interfered with the corner of the side rail when the rung is assembled to the side rail The rungs can be easily assembled.

Referring to FIG. 9, the first fastening hole 411 and the second fastening hole 412 are formed to be positioned at the same height through bending, The first fastening hole 411 passes through the second fastening hole 412 when the first fastening hole 30 is engaged.

In addition, a double wall is formed by the angular portions formed by the first fastening holes 411 and the second fastening holes 412, and the coupling is made through the side rails 1 and the fastening bolts 30 A firmer bond can be achieved. That is, since the fastening bolts 30 are coupled to two places of the rungs 400, the coupling between the rungs 400 and the side rails 1 is made more tightly.

FIG. 10 is a perspective view showing a rung according to a third embodiment of the present invention, and FIG. 11 is a view sequentially showing an extended portion of a rung according to a third embodiment of the present invention is inserted into an end insertion hole.

Referring to FIG. 10, in the third embodiment of the present invention, the same parts as those of the previous embodiment will not be described in detail, and an end portion of the extension portion 510 formed to protrude outward from both sides of the body portion 301, And a curling end 515 having an angle or a curved shape at a predetermined curvature.

The end of the extension 510 may be manufactured to have a bent shape and the end of the extension 510 is curled. In the third embodiment, the end insertion hole 530 may be formed in a shape in which a part of the body part 501 is cut and inclined at a predetermined angle in a downward direction along the incision, and a part of the body part 501 is inclined And a step 501b provided between the inclined surface 501a and the body part 501. [ That is, the end insertion hole 530 may be formed to pass through the body 501 in the lateral direction.

In the third embodiment, when the extension portion 510 is bent, the extension portion 510 is bent in a circular shape so that the end portion 515 can be fitted and fixed to the step portion 501b formed in the end insertion hole 530 .

As shown in FIG. 11, when the extension 510 is bent so as to have a curvature, it is bent in a circular shape. In this case as well, the extension 510 is located outside the first fastening hole 511 The formed second fastening hole 512 is positioned inside the body 501 and the first fastening hole 511 is positioned outside.

As described above, the first and second fastening holes 511 and 512 are formed at positions where the fastening bolts 30 can pass through the two fastening holes when the extension 510 is bent .

12 is a top view (a) and a sectional view (b) of a rung according to a third embodiment of the present invention. 12A, the first side portion 502 and the second side portion 503, which are connected to the body portion 501 to form side walls, as in the first embodiment, The bent portion 515 may be formed to prevent the portion 310 from moving to both sides. The bent portion 315 may be formed at a position corresponding to the transverse length of the extended portion 510 and may be formed at a position contacting the extended portion 515 so as to prevent the bent extended portion 510 from moving in the left- And can be press-fitted caulked inward. Accordingly, the extension 510 can be fixed in close contact with the bending portion 315 in the vertical direction.

13 is a cross-sectional view showing a state where the rung according to the third embodiment of the present invention is coupled to the side rail. 13, a double wall is formed by the angular portions of the extension formed with the first fastening hole 511 and the second fastening hole 512, and the side rail 1 and the fastening bolt 30 A stronger coupling can be achieved. That is, the fastening bolts 30 are coupled to two places of the rungs 500, so that the coupling between the rungs 500 and the side rails 1 is made more tightly.

According to the embodiments of the present invention as described above, the ends of the rungs are bent, and two fastening holes are formed in the bent extensions. By fastening the fastening bolts to the fastening holes, It becomes two places, which eventually makes a stronger connection with the side rail.

In addition, in order to form two parts of the rungs coupled with the fastening bolts, it is not necessary to provide a separate double wall, and since such an additional structure is not formed, manufacturing cost of the rung can be greatly reduced.

Claims (5)

A runner for a cable tray disposed between the side rails to maintain a space between the side rails,
Wherein the rung includes a body part forming a body and an extension part extended from both sides of the body part so as to protrude outwardly,
An end insertion hole having a size such that an end of the extension portion can be inserted is formed in the body portion,
A first fastening hole and a second fastening hole are formed in the extended portion so as to be spaced apart from each other by a predetermined distance,
A curved portion bent upward is formed on a lower surface of a side portion adjacent to the extended portion while being connected to the body portion to constitute wall surfaces of both sides, the curved portion is formed at a position corresponding to the transverse length of the extended portion, Which is in contact with the inner surface of the cable tray. A runner for a cable tray disposed between the side rails to maintain a space between the side rails,
Wherein the rung includes a body part forming a body and an extension part extended from both sides of the body part so as to protrude outwardly,
An end insertion hole having a size such that an end of the extension portion can be inserted is formed in the body portion,
A first fastening hole and a second fastening hole are formed in the extended portion so as to be spaced apart from each other by a predetermined distance,
Wherein a stopper is formed on an inner side of a side portion adjacent to the extending portion, the stopper being connected to the body portion so as to be in contact with a bottom portion of the extending portion. 3. The method according to claim 1 or 2,
The spacing between the first fastening hole and the second fastening hole may be such that when one end of the extended portion is inserted into the end insertion hole by the bending of the extended portion, one bolt is inserted into both the first fastening hole and the second fastening hole And the cable runner is set so as to be able to pass through. delete A plurality of side rails,
An inner fastening portion coupled to the inside of the side rail,
An outer fastening portion coupled to the outside of the side rail,
And a rung for engaging side rails disposed at positions spaced apart from each other by a predetermined interval in the side rails,
Wherein the rung includes a body part forming a body and an extension part extended from both sides of the body part so as to protrude outwardly,
An end insertion hole having a size such that an end of the extension portion can be inserted is formed in the body portion,
A first fastening hole and a second fastening hole are formed in the extended portion so as to be spaced apart from each other by a predetermined distance,
The end portion of the extended portion is bent so that the first fastening hole and the second fastening hole are inserted into the end insertion hole so that the first fastening hole and the second fastening hole are at the same height, A cable tray in which a bolt hole is formed for insertion of a bolt.

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