Cable duct formed on a rod grid mat

Abstract

A cable duct (12) formed on a bar grid mat (4), characterized in that the cable duct (12) is composed of at least one first angle profile (14) and at least one fixing element (22), which are fastened to the bar grid mat (4) on opposite sides, the at least one first angle profile (14) has at least two spaced-apart legs (18a) which define a receiving space (24a) for receiving cables between them, at least one of the legs (18a) of the first angle profile (14) has, on a free outer edge (26a), openings (28a) of a number of insertion slots (30a), which extend inwards from the free outer edge (26a), the insertion slots (30a) in the at least one first angle profile (14) have a mutually parallel course and each have a channel width which corresponds at least to the bar thickness of transversely extending bars (8) of the bar grid mat (4) corresponds tothe at least one first angle profile (14) is suspended in the bar grid mat (4) such that transversely extending bars (8) of the bar grid mat (4) are located in the insertion slots (30a), and the at least one fixing element (22) is connected to the at least one first angle profile (14) via at least one connecting element (32).

Description

[0001] The present invention relates to a cable duct formed on a rod grid mat.

[0002] A fence system made of bar mesh panels is known from document DE 20 2009 016 369 U1. Such fence systems are used in particular as protective devices for machines and / or systems. It is mandatory to cover and protect the moving parts of machines and / or systems in such a way that people are not exposed to any danger. Corresponding regulations can be found in standards EN 12100, EN 294, EN 811, EN 953 and EN 1088 and in the Machinery Directive. The size of the fence systems, i.e. the height and width of the individual elements such as posts and protective grilles as well as their distance from the danger point, depends on the machines and / or systems and the ensuing hazard potential. This, in turn, influences the strength of the protective grilles and the dimensions of the posts.For example, any parts that may fly out of the machine and / or system must be caught by such a protective device with bar mesh mats and posts.

[0003] Bar mesh panels are available as purchased parts in various square or rectangular grid sizes, for example, 20, 30, 40, or 50 mm, and in various bar thicknesses from 2 to 8 mm. They must be securely connected to the posts. The bar mesh panels, as described in document DE 20 2009 016 369 U1, are held in a frame that surrounds a bar mesh panel, which in turn is attached to the adjacent posts. The frames and posts are connected via fittings, which must be attached to the frame and post during installation of the fence system.

[0004] In order to supply power to the machines and systems surrounded by a fence made of bar mesh mats and to integrate them into an automated production control system, it is necessary to run electrical and / or electronic cables to the machine or system. To avoid the laborious opening and closing of floor areas in production facilities when new machines are installed or old machines are dismantled, or when the cable network needs to be reinstalled, repaired, or maintained, the electrical or electronic cables in production facilities are often laid above ground. To protect employees working in the production facilities from electric shocks and the cables installed there from damage and short circuits, the electrical or electronic cables are laid in special cable ducts.Installing cable ducts is a complex process because they are attached to a support along their length using assembly aids. The desired cables must then be inserted into the cable duct, secured there, and then sealed with a covering material in a further step. Attaching cable ducts to fences requires additional work because conventional cable ducts use endless profiles that cannot be attached to the bar mesh panels used in the fences without additional work. To attach cable ducts to fences, holes must be drilled in the endless profiles at suitable locations, into which connecting elements are then manually inserted and screwed to the bar mesh panels. The next step is to lay the cables in the cable ducts.

[0005] It is the object of the present invention to provide a cable duct which facilitates installation on a rod grid mat.

[0006] The problem is solved by the characterizing features of claim 1.

[0007] The cable duct is composed of at least one first angle profile and at least one fixing element. The at least one first angle profile can be folded or rolled from a metal sheet, or cast or extruded as a plastic molded part. The material thickness, shape, and selected material depend on the specific application. For example, a profile with an L- or U-shaped cross-section can be used as the first angle profile. The insertion slots in the first angle profile can be punched or lasered out of the sheet metal.

[0008] The at least one first angle profile and the at least one fixing element are attached to the rod mesh mat on opposite sides. By arranging these components on opposite sides of the rod mesh mat, these components can be counter-locked and permanently fixed to the rod mesh mat. To create a cable duct of the desired length, multiple first angle profiles can be used. It is also possible to use multiple fixing elements for one or more first angle profiles.

[0009] The at least one first angle profile has at least two spaced-apart legs which define a receiving space for cables. The surfaces of the two legs shield the receiving space inwards and outwards. The receiving space is intended to accommodate the cables. The two legs are connected to one another by a base which shields the receiving space defined by the first angle profile from the outside from another side. After the first angle profile has been fastened to a bar grid mat, the receiving space is delimited by the bar grid mat on the other side with which the at least one first angle profile has been placed with its open side of the profile cross-section. In this way, the receiving space is circumferentially delimited and protected in a direction transverse to the direction of extension of the cables laid in the cable duct.

[0010] The profile cross-section of the first angle profile is designed to provide a sufficiently large free cross-sectional area to accommodate the cables that are to be laid within it. The width of the legs with which the first angle profile is supported on the rod grid mat determines the internal height of the receiving space, for example, in the case of a U-shaped cross-section of the angle profile, while the width of the base determines the width of the receiving space. Depending on the dimensioning of the width of the legs and the width of the base, receiving spaces of different sizes can be created. It is possible to keep various first angle profiles in stock like a modular system in order to be able to use cable ducts of different sizes as needed.Angle profiles with a small free cross-section of the receiving space can be used if only a single cable with a small cross-sectional area is to be laid in the cable duct, for example, to connect a switch, a button, a light barrier, a display, or a camera that is accessible from the outside of the fence system or mounted outside the fence system to a machine control system. However, an angle profile with a comparatively large free cross-section of the receiving space can also be used to route many individual cables or one or more cables with a comparatively large cross-section along the fence system.

[0011] At least one of the legs of the first angle profile has, on a free outer edge, openings for a number of insertion slots that extend inward from the free outer edge of the leg. The insertion slots each form a channel with which the angle profile can be pushed onto a bar of the bar grid mat that extends in the transverse direction. The inward extension direction means that the insertion slots extend over part of the width of the leg in which the insertion slots are inserted. The insertion slots are closed at their ends opposite the opening. The end of an insertion slot forms a stop for a bar onto which the angle profile with the insertion slot is pushed.An angle profile that is pushed onto transverse bars of the bar grid mat using the insertion slots can therefore only be pushed onto the bar grid mat as far as the insertion slots reach. The insertion slots can be straight or have a single or multiple curve. If the insertion slots point upwards from the openings, at least in some areas, the legs slide automatically or at least with support along the insertion slots into the spaces between the bars and through the plane of the bar grid mat after passing the transverse bars with the openings due to the weight of the angle profile. This particularly facilitates the installation of the cable ducts on the construction site.If the angle profile collides with the side of the rail, it won't simply slide out of its mounting position along the insertion slots unless the angle profile is additionally lifted. The insertion slots can also have a labyrinthine design, which further prevents the angle profile from accidentally slipping out of the cross-running bars.

[0012] The insertion slots in the at least one first angle profile run parallel to one another and each have a channel width that corresponds at least to the bar thickness of transversely running bars of the bar grid mat. The width of an insertion slot can remain the same or vary along its length. The insertion slots formed in the first angle profile can have an arrangement or a course along their length that blocks or hinders a pulling-out movement of the angle profile at least in a horizontal direction. In this way, the angle profile is at least partially secured against falling out in the event of an impact. The insertion slots can also be designed so wide that the leg of the first angle profile with the insertion slots has a comb-like configuration in which only narrow teeth protrude between the insertion slots.Also, due to the parallel course of the insertion slots, the legs of the angle profile with the mouth openings and insertion slots can be pushed onto the transverse bars of the bar grid mat with an insertion movement and then sunk further into the bar grid mat without the legs becoming jammed with individual bars.

[0013] The spacing and number of insertion slots can correspond to the spacing and number of transverse bars of the bar grid mat in the area of the angle profile, because otherwise individual bars that reach up to the first angle profile and for which there is no suitable insertion slot in the first angle profile would block the placement movement. The legs can also be designed with different widths, so that where there are no insertion slots, the legs end where the insertion slots also end in wider sections of the legs. The legs can then be designed in such a way that they have protruding lugs at intervals of 25 cm or 50 cm, for example, in which the insertion slots are formed, and the other free outer edges of a leg only rest on the surface of a bar grid mat or even maintain a small distance from it.

[0014] An angle profile does not necessarily have to extend the entire height of the rod mesh panel. Rather, the angle profile is advantageously only as long as the cable duct is to be formed on the rod mesh panel. An angle profile can be cut to the required length. However, it is also possible for the rod mesh panel to be less high than the first angle profile, so that the cable duct extends beyond the rod mesh panel, for example, to guide a cable duct up to the ceiling of a hall. It is also possible to run a long angle profile along several rod mesh panels and hook it into them.

[0015] Since bar mesh panels are usually made up of bars arranged at right angles to each other, it is particularly easy to use an angle profile to create cable ducts on bar mesh panels that run vertically or horizontally. An angle profile can be attached to a bar mesh panel using the slots not only vertically but also horizontally. Since diagonal cable ducts are often undesirable or even not permitted, this is not a major disadvantage. Using appropriate connectors or angle pieces, it is possible to attach diagonally running cable ducts to a bar mesh panel using an angle profile, or to create a cable duct with a stepped layout that ultimately runs diagonally across a bar mesh panel.

[0016] For bar grid mats with different grid spacings, different first angle profiles with correspondingly differently arranged and dimensioned insertion slots are required. However, these can be kept in stock as part of a modular system to suit different technical requirements. For example, for bar grid mats with a 30 mm grid spacing, first angle profiles can be kept in stock with insertion slots spaced 30 mm apart, and for bar grid mats with a 40 mm grid spacing, first angle profiles with insertion slots spaced 40 mm apart, etc.The first angle profiles and fixing elements, which may also be designed as second angle profiles, as well as the associated bar grid mats can be kept in various material thicknesses, dimensions, pitches and bar thicknesses in a modular system that makes it possible to create cable ducts on bar grid mats in almost any size to suit almost any protection requirements.

[0017] In the assembly position, the at least one first angle profile is suspended in the bar grid mat in such a way that transversely running bars of the bar grid mat pass transversely through insertion slots in the angle profile.

[0018] The fixing element is connected to the at least one first angle profile via at least one connecting element. The at least one first angle profile arranged on opposite sides of the bar grid mat and the at least one fixing element are connected to one another in their installed position via the connecting element(s). If the fixing element is larger than the grid dimension of the bar grid mat, it cannot slip through a grid of the bar grid mat when connected to the first angle profile. In this way, the fixing element counters the first angle profile. For the fixing function of the fixing element, it is not necessary for it to extend over the same height as the first angle profile and / or the bar grid mat. In particular, the fixing element can be shorter than the first angle profile and / or the bar grid mat.The fixing element does not necessarily have to be a single piece extending the height of the first angle profile and / or the rod grid. For easier installation, several short fixing elements can be installed on a long first angle profile, distributed over the height of the first angle profile and / or the rod grid.

[0019] The connecting elements do not have to be separate components, but can also be a direct part of the first angle profile and / or the fixing element. For example, the first angle profile and / or the fixing element can have corresponding and appropriately positioned hooks and hook receptacles that allow the fixing element to be hooked onto the first angle profile. However, the connecting elements can also be designed as separate components, for example as pressure or tension screws that connect the first angle profile and the fixing element and by which the angle profile and the fixing element are pulled towards each other and towards the bar grid mat or pushed away from each other, so that the contours of the insertion slots hook into the bars of the bar grid mat.Instead of compression or tension screws, eccentric tension levers can also be used, which can be inserted into suitable openings and tightened without the need for tools. The at least one first angle profile can no longer be lifted off the bar grid mat without damaging it when connected to a fixing element on the other side of the bar grid mat. The fixing element can also be designed such that it rests laterally against at least one leg of the first angle profile. If the leg is screwed to the fixing element in a direction parallel to the plane of the bar grid mat, the first angle profile is also fixed in its installed position. The fixing element can be designed as a flat plate, an L- or U-shaped profile, or as another spatial body that is too large to fit through an open grid of the bar grid mat. The material for the fixing element can be metal or plastic, for example.

[0020] The assembly of the cable duct according to the invention is considerably simplified. In particular, it is possible, in a first step, to attach the cables that are to be protected by the cable duct directly to the bar grid mat at the location where the later cable duct is to run. The cable(s) can be attached to the bar grid mat quickly and easily using cable ties, for example. With such open installation of the cables, they are very easily accessible and can therefore be easily positioned and fixed in place. If care was taken during the installation of the cable(s) to ensure that the installed cable(s) is(are) located exactly where the cable duct is to be later positioned, it is possible to place at least one first angle profile onto the already installed cables in such a way that the cables are concealed by the first angle profile and are located within the receiving space formed in the first angle profile.If the first angle profile is placed on the bar grid mat during the placement movement so that the openings of the insertion slots are located exactly in the area of the transverse bars of the bar grid mat, it is possible to push the legs of the first angle profile further through the grid openings between the transverse bars of the bar grid mat so that the transverse bars of the bar grid mat are located in the insertion slots. As soon as the legs of the first angle profile have penetrated the grid openings between the bars in the bar grid mat, the receiving space in the first angle profile is closed on the circumference, thus creating a closed cable duct.To complete the assembly, it is only necessary to fix the first angle profile in its installed position by connecting the fixing element to the first angle profile from the opposite side of the bar grid mat using the connecting elements.

[0021] The first angle profile designed according to the invention thus makes it considerably easier to mount a cable duct on a rod mesh mat. If the cable duct needs to be disassembled later, or if additional cables need to be installed or removed from the cable duct, the cable duct can also be easily removed from the rod mesh mat in the reverse order.

[0022] When this description refers to a bar mesh mat, this term is not limited to bar mesh mats in the narrow technical sense. The term also covers designs of flat elements that have a structure that, like the transverse bars of a bar mesh mat, can be used to attach a first angle profile with the insertion slots formed therein. In this respect, the term "bar mesh mat" is also synonymous with, for example, sheet metal plates, Plexiglas panels, or boxes with correspondingly designed projections that enable an angle profile to be attached by sliding the legs of the angle profile with the insertion slots onto cross elements, as in the bar mesh mat of a fence system.

[0023] According to one embodiment of the invention, the first angle profile is designed as a profile with a U-shaped cross-section, with the legs extending at a right angle to the base. In this design, the first angle profile is connected to the rod mesh mat via both legs and is thus securely held in its mounting position. The angle profile is cost-effective to manufacture. The receiving space has a rectangular cross-section, so it can easily be placed like a lid on a cable harness laid on a rod mesh mat.

[0024] According to one embodiment of the invention, the legs of the first angle profile have separate recesses. The separate recesses can be used to lead cables out of the cable duct or into the cable duct. The recesses can be located at regular intervals in the legs. If the recesses are present in the legs, there is no significantly increased risk of damage to the cables lying in the cable duct because the legs are difficult to access from the sides and there is a lower risk of foreign objects hitting them or liquids or sparks entering the cable duct through the recesses. With recesses in the side legs, the base of the angle profile can remain closed, so that the protective function of the angle profile is fully retained on this surface.

[0025] According to one embodiment of the invention, the insertion slots are sized so that, even when a transverse bar of the bar mesh mat is located in the respective insertion slot, there is still space for a cable feedthrough. If the insertion slots are sized so that, even when the angle profile with the insertion slots is suspended in a bar mesh mat, a cable can still be fed through the insertion slot from the outside into the receiving space or from the receiving space to the outside, it is possible to dispense with separate openings for cable feedthroughs. The cables can then be easily fed into and out of the cable duct at locations predetermined by the spacing of the insertion slots.

[0026] According to one embodiment of the invention, the first angle profile is made of a metallic material. The metallic material is well suited to dissipating heat generated in the cables to the outside. This prevents higher temperatures in the cables and the resulting higher resistance and correspondingly higher power consumption. The metallic material also shields the cables against potential electromagnetic interference. The radiation of high-frequency interference energy is also reduced by a metallic angle profile.

[0027] According to one embodiment of the invention, in a vertical mounting position of the first angle profile on a bar grid mat, the insertion slots extend upwards from the mouth openings. The vertical mounting position of the first angle profile means an mounting position in which the longitudinal center axis of the angle profile is aligned at least approximately vertically. If, in this orientation, the insertion slots extend upwards from the mouth opening, an angle profile slides downwards on the transversely extending bars of the bar grid mat during its installation with the upper edges of the insertion slots following the path of the insertion slots. The insertion movement of the first angle profile into the bar grid mat is facilitated by the dead weight of the first angle profile, and the first angle profile is guided in its movement by the path of the insertion slots.Due to its own weight, an angle profile can only be released from the installed position if it is lifted out of the installed position following the path of the insertion slot. The angled path of the insertion slot thus provides inherent security for the first angle profile in the installed position.

[0028] According to one embodiment of the invention, the fixing element is designed as a second angle profile with at least two spaced-apart legs, at least one of which has a number of openings on a free outer edge, from which insertion slots extend in an inward direction. The insertion slots located in the second angle profile are parallel to one another and each have a channel width that corresponds at least to the bar thickness of the transversely extending bars of the bar grid mat. A fixing element designed in this way can be mounted on a bar grid mat in the same way as described above for a first angle profile.In order to be able to slide a fixing element onto the transversely running bars of a bar grid mat suspended from the first angle profile, the mouth openings of the insertion slots formed in the fixing element are located on the outer edge pointing in the direction of the insertion slots in the leg of the first angle profile. Due to this arrangement of the mouth openings and the course of the insertion slots formed in the fixing element, the fixing element can be moved towards the first angle profile during assembly and pushed over the transversely running bars of the bar grid mat in the area of the insertion slots, onto which at least one leg of the first angle profile is also pushed. The insertion slots located in the fixing element extend inwards from the outer edge of a leg in a direction opposite to the insertion slots in the first angle profile.This alignment of the insertion slots allows the fixing element, with its openings formed thereon, to be placed against the transverse bars and then moved further toward the bar grid mat and the first angle profile, so that the transverse bars of the bar grid mat engage the insertion slots in the fixing element and the fixing element partially penetrates the bar grid mat. The design options described above for a first angle profile apply accordingly to the second angle profile sheet.

[0029] According to one embodiment of the invention, the fixing element is designed as a profile with a U-shaped cross-section, and the legs of the profile have a width that defines a receiving space between them when the fixing element is installed. With a correspondingly dimensioned width of the legs, the fixing element protects another circumferentially enclosed receiving space on the opposite side of the bar mesh mat, which can also be used as a cable duct or for other purposes.

[0030] According to one embodiment of the invention, at least one pressure screw is used as a connecting means for connecting the first angle profile to a fixing element.

[0031] Further features of the invention emerge from the claims, the figures, and the description of the figures. All features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures, can be used not only in the respective specified combination, but also in other combinations, provided there are no compelling technical obstacles to this.

[0032] The invention will now be explained in more detail using preferred embodiments and with reference to the accompanying drawings.

[0033] They show: Fig. 1: a fence system from a frontal view, Fig. 2: a perspective view of a section of a rod grid mat with a mounted cable duct, Fig. 3: a view of a section of an assembled cable duct from the side, and Fig. 4: a top view of a cable duct mounted on a rod mesh mat.

[0034] The Fig. Figure 1 shows a frontal view of a fence system 2. In the fence system 2, a bar mesh panel 4 is suspended at its sides from two posts 6. The bar mesh panel 4 is composed of a number of transverse bars 8 and vertical bars 10. The two posts 6 are supported on the ground via a base plate 20.

[0035] The Fig. 2 shows a perspective view of a section of a bar grid mat 4 with a mounted cable duct 12. The cable duct 12 is composed of at least one first angle profile 14 and at least one fixing element 22. The cable duct 12 and the fixing element 22 are fastened to the bar grid mat 4 on opposite sides. The fixing element 22 is designed as a second angle profile 16 with at least two spaced-apart legs 18b. The first angle profile 14 is designed as a profile with a U-shaped cross-section, in which the legs 18a protrude at a right angle to the base 34. The two spaced-apart legs 18a of the first angle profile 14 define a receiving space 24 between them for receiving cables.

[0036] The Fig. 3 shows a side view of a section of an assembled cable duct 12 in its assembled position. The view shows the transverse bars 8 and a longitudinal bar 10 of the bar grid mat 4, particularly with highlighted lines in the center of the drawing. The outline contours of the first angle profile 14 and the second angle profile 16 are shown one above the other in solid lines. The outline contours of the leg 18a of the first angle profile 14 are highlighted in wider lines in the upper part of the drawing, and the outline contours of the leg 18b of the second angle profile 16 are highlighted in wider lines in the lower part of the drawing. The first and second angle profiles 14, 16 have a U-shaped cross-section and are connected to one another by a base 34.

[0037] The leg 18a of the first angle profile 14 has, on a free outer edge 26a, openings 28a of a number of insertion slots 30a that extend inwardly from the free outer edge 26a. The insertion slots 30a in the first angle profile 14 run parallel to one another and each have a channel width that corresponds at least to the bar thickness of transversely extending bars 8 of the bar grid mat 4. In a vertical mounting position of the first angle profile 14 on the bar grid mat 4, the insertion slots 30a extend upwards from the openings 28a. The first angle profile 14 is suspended in the bar grid mat 4 such that transversely extending bars 8 of the bar grid mat 4 are located in the insertion slots 30a. The fixing element 22 is connected to the first angle profile 14 via a connecting element 32.The connecting element 32 is shown only in dashed lines; in the embodiment shown, it is designed as a pressure screw which is connected to the first angle profile 14 via a thread 36 and is supported by the pressure head 38 on the inside of the second angle profile 16.

[0038] The Fig. Figure 4 shows a top view of a cable duct 12 mounted on a bar grid mat 4. This view clearly shows that the first angle profile 14 and the fixing element 22, which in the exemplary embodiment is designed as a second angle profile 16, are arranged on opposite sides of the bar grid mat 4. The receiving spaces 24a and 24b are also clearly visible in this view. It is also clearly visible that these receiving spaces 24a, 24b are enclosed in the transverse direction by the angle profiles 14, 16 and the transversely extending bars 8 of the bar grid mat 4.

[0039] The invention is not limited to the above embodiments. It will be readily apparent to those skilled in the art to modify the embodiments in a manner deemed appropriate to adapt them to a specific application. List of reference numbers 2 fence system 4 bar grid mat 6 posts 8 transverse rod 10 vertical rod 12 cable duct 14 first angle profile 16 second angle profile 18 legs 20 base plate 22 Fixing element 24 recording room 26 free outer edge 28 Muzzle opening 30 slot 32 connecting element 34 Base 36 threads 38 print head 40 cable entry QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 20 2009 016 369 U1 [0002, 0003]

Claims

[1] Cable duct (12) formed on a bar grid mat (4), characterized bythat the cable duct (12) is composed of at least one first angle profile (14) and at least one fixing element (22), which are fastened on opposite sides to the bar grid mat (4), the at least one first angle profile (14) has at least two spaced-apart legs (18a) which define a receiving space (24a) between them for receiving cables, at least one of the legs (18a) of the first angle profile (14) has, on a free outer edge (26a), openings (28a) of a number of insertion slots (30a), which extend from the free outer edge (26a) in an inward direction, the insertion slots (30a) in the at least one first angle profile (14) have a mutually parallel course and each have a channel width which corresponds at least to the bar thickness of transversely extending bars (8) of the bar grid mat (4), the at least one first angle profile (14) is so in the rod grid mat (4) is hung,that transversely extending bars (8) of the bar grid mat (4) are located in the insertion slots (30a), and the at least one fixing element (22) is connected to the at least one first angle profile (14) via at least one connecting element (32). [2] Cable duct (12) according to claim 1, characterized by that the first angle profile (14) is designed as a profile with a U-shaped cross-section, in which the legs (18a) protrude at a right angle to the base (34). [3] Cable duct (12) according to claim 1 or 2, characterized by that the legs (18a) of the first angle profile (14) have separate recesses. [4] Cable duct (12) according to one of the preceding claims, characterized by that the insertion slots (30) have a channel size such that when a transverse bar (8) of the bar grid mat (4) is located in the respective insertion slot (30), there is still space for a cable feedthrough (40). [5] Cable duct (12) according to one of the preceding claims, characterized by that the first angle profile (14) is made of a metallic material. [6] Cable duct (12) according to one of the preceding claims, characterized by that the insertion slots (30a) in a vertical mounting position of the first angle profile (14) on a bar grid mat (4) have an upwardly directed course starting from the mouth openings (28a). [7] Cable duct (12) according to one of the preceding claims, characterized bythat the fixing element (22) is designed as a second angle profile (16) with at least two spaced-apart legs (18b), of which at least one has a number of mouth openings (28b) on a free outer edge (26b), from which insertion slots (30b) extend in an inward direction, the insertion slots (30b) located in the second angle profile (16) have a mutually parallel course and each have a channel width which corresponds at least to the bar thickness of the transversely extending bars (8) of the bar grid mat (4). [8] Cable duct (12) according to claim 7, characterized by that the fixing element (22) is designed as a profile with a U-shaped cross-section and the legs (18b) of the profile have a width with which the legs (18b) delimit a receiving space (24b) between them in the assembled position of the fixing element (22). [9] Cable duct (12) according to one of the preceding claims, characterized bythat at least one pressure screw is used as connecting means (32) for connecting the first angle profile (14) to a fixing element (22).

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