FI68305C - CABLE SHELF FOR MONTERING AV ELECTRIC CABLE - Google Patents

Description

68305

The present invention relates to a cable shelf for the installation of electric-5 games, which shelf forms an H-shaped support ladder in cross-section, consisting of two spaced parallel edge spars and a plurality of spaced apart side spans 10 attached at its ends to the edge beams.

Cable shelves of this type are used in factory halls, corridors, and the like to conduct multiple electrical cables in groups from one location to another. From the individual ladder-like shelf elements, suitable shelving systems are assembled in each case, which are fixed to the ceiling or walls of the premises or supported by scaffolding on the floor and on which the cables are usually installed on the transverse ones.

It is previously known to manufacture a shelf element from separate parts formed by metallic profile bars, i.e. from two edge beams and a plurality of transverse small pieces which are assembled into an H-shaped support ladder in cross section. In order to provide a rigid, cohesive structure 25, the transverse small ones must be attached at their ends to the edge beams, either by welding or mechanically.

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By performing the fastening of the transverse small parts by welding, it is difficult to achieve a neat job and the welding weakens the strength of the chords and small parts when the

30 parts are made of aluminum, extruded profile bars. Welding requires a small thickness of a small size and is more difficult to automate than mechanically performed fixing.

Mechanical fastening requires stamping of some kind of fastening tabs 35 on transverse small ends and stamping corresponding notches on the edge pairs and pushing or twisting said fastening tabs after the tabs have been inserted through the notches. The mechanical fastening head is thus both laborious and slow 5 and is generally based on machining the ends of the truncated transverse tongue into fastening tongues.

The object of the present invention is to provide a cable shelf which avoids the above-mentioned drawbacks and enables the assembly of the cable shelf to be considerably simplified. This object is achieved by a cable tray according to the invention, which is characterized in that the edge pairs have a longitudinal U-shaped rib with through-grooves for the end edges of each transverse small.

The invention is based on the idea that already in connection with its manufacture the edge pair 15 is formed in such a way that when the end of the transverse pin is inserted into the notches made in the edge chord, the two end edges of the cross member extend through the edge chord despite the fact that the end of the transverse fin is cut completely straight. As a result, the ends of the transverse small need not be machined at all after the small has been cut to the desired length. The edge girder also does not require any machining operations other than the grooving of the notches on the us-25. The formation of the rib required by the invention on the edge girder is simply feasible in the manufacturing step of the girder.

According to the invention, a simple and quick-to-assemble cable shelf is thus provided, which thus has 30 connections. The rib in the chord forms a kind of pin which protrudes inside the transverse small and supports the small in different directions in the transverse plane. The through-going end edges of the small receive the bending forces on the shelf and the other two end edges of the small receive the compressive forces on the shelf 35.

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The invention will be described in more detail below with reference to the accompanying drawing, in which Figure 1 shows a perspective view of a preferred embodiment of a cable tray according to the invention, Figure 2 shows a larger size shelf divided into sections, Figures 3 and 4 show sections III-III and IV-IV respectively. , Fig. 5 shows the cable tray as seen from the outside, Fig. 6 shows a part of the cable tray as seen from above, and Fig. 7 shows a section along the line VII-VII in Fig. 3.

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The cable shelf shown in the drawings comprises a support ladder 1, which in this case is suspended in a horizontal position by means of suspension rods 2 fixed to a support structure (not shown).

The support ladder is H-shaped in cross-section and comprises two spaced apart parallel parallel pairs 3 20, which are connected to each other by a plurality of longitudinally spaced transverse small pairs 4. The edge pairs and transverse small pieces are preferably cut into pieces of suitable length. .

The edge rafters form a planar web plate 5 having a U-shaped cross-sectional fastening rib 6 extending from the second blade surface 5a of the web plate and forming a corresponding trough 30 7 in the second blade surface 5b of the web plate.

The transverse fin is formed by a hollow body with a substantially rectangular cross-section. The height of the rib of the edge chord, i.e. the distance between the upper and lower edges 6a, 6b of the rib, is dimensioned to correspond substantially 35 to the internal height of the transverse fin, i.e. the distance between the upper and lower edges 4a, 4b of the small end part.

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Two notches 8 are made in the fastening rib of each edge pair for each transverse small part, the distance between which corresponds to the distance between the two side edges 4c, 4d of the transverse small part.

5 To assemble the support ladder, the transverse weights are placed at their end edges in the corresponding notches, whereby the part of the rib between the notches extends pin-like inside the small one. Both side edges 4c, 4d of the small extend through the rib to the opposite side of the web plate, whereby they can be simply bent 10 times in the trough 7 so that the small becomes locked in the chord, as shown in Fig. 7.

It should be noted that no special fastening tabs need to be inserted into the transverse end of the small piece, but the small end may be directly cut off. The edges extending through all the small chords 15 can be bent by rolling the edges in the same direction, but of course the edges can also be bent in different directions if necessary. The top and bottom edges of each small press against the web plate of the chord and receive the compressive forces applied to the ladder, and the knurled side edges of the small receive the bending forces applied to the ladder.

The drawing and the related explanation are only intended to illustrate the idea of the invention. The details of the cable shelf according to the invention may vary within the scope of the claims.

Claims (5)

68305 A cable shelf for installing electrical cables, which shelf forms an H-shaped support ladder (1) consisting of two spaced parallel edge pairs (3) and a plurality of spaced longitudinally spaced edge pairs connecting the edge pairs. (4) fastened at their ends to edge edges 10, characterized in that the edge pairs (3) have a longitudinal U-shaped rib (6) with through-grooves (8) for the end edges (4c, 4d) of each transverse surface (4) . Cable shelf according to claim 1, wherein the transverse fin (4) is hollow and rectangular in cross section, characterized in that the rib (6) is rectangular in cross section and that the notches (8) extend perpendicular to the longitudinal axis of the rib. Cable shelf according to Claim 2, characterized in that the distance between the edges (6a, 6b) of the rib (6) corresponds substantially to the distance between the two opposite edges (4a, 4b) of the transverse small (4). Cable shelf according to one of the preceding claims, characterized in that the rib (6) projects from the second blade surface (5a) of the edge beam (3) and forms a corresponding trough (7) on the second blade surface (5b). Cable shelf according to Claim 3, characterized in that the distance between the notches (8) of the rib (6) corresponds to the distance between the two other opposite edges (4c, 4d) of the transverse small (4).