supporting structure

Abstract

Supporting structure, in particular a stair step, with a grating floor (1), wherein the grating floor (1) has bearing bars (5) and infill bars (6) and is connected to two fastening tabs (2) as well as a leading edge (3) and a penetration protection (4), characterized in that the bearing bars (5) have tapered ends (8) which are inserted through openings (10) in the fastening tabs (2) and connected to them.

Description

[0001] The invention relates to a supporting structure, in particular a stair step, with a grating floor, wherein the grating floor has bearing bars and infill bars and is connected with two fastening tabs as well as a leading edge and a penetration protection.

[0002] From EP 3 660 239 A1, a supporting structure, in particular a stair step, is known, with a grating floor connected to at least one side stringer, wherein the grating floor has bearing bars and infill bars, wherein the supporting structure has at least one support profile.

[0003] EP 4 549 677 A1 describes a step device consisting of several intersecting grating elements, comprising a metallic step frame and at least one starting element attached thereto, forming a tread surface of which at least a first part, adjoining a starting edge that delimits the tread surface and faces opposite to the direction of travel, is formed by the starting element. The starting element is at least partially made of plastic.

[0004] The object of the present invention is to provide a support structure that is easy to manufacture and offers increased structural integrity.

[0005] This problem is solved according to the invention by the fact that the support rods have tapered ends which are inserted through openings in the fastening tabs and connected to them.

[0006] Furthermore, it is within the scope of the invention that the filler rods have tapered ends which are inserted through openings in the leading edge or in the penetration protection and connected to them.

[0007] This innovative plug-in system significantly simplifies the manufacturing of such load-bearing structures and also increases structural integrity.

[0008] A preferred embodiment of the invention consists in the fact that the tapered sections of the support bars are welded to the fastening tabs from the outside.

[0009] Welding from the outside is advantageous because it offers better accessibility. Furthermore, the welding area is relatively small.

[0010] A further development of the invention consists in the fact that the tapered sections of the filler rods are connected to the leading edge or the penetration protection by stapling.

[0011] This allows for precise positioning of the filler rods and rapid manufacturing of the supporting structure.

[0012] A preferred embodiment of the invention consists in the fact that the tapered sections of the support bars are provided with rounded edges at their base.

[0013] It has also proven advantageous that the tapered sections of the filler rods are provided with rounded edges at their base.

[0014] These curves (or radii) minimize stress peaks and thus result in a low-notch geometry of the load-bearing bars. This has a positive effect on the fatigue strength of the supporting structure.

[0015] An embodiment of the invention is explained in more detail below with reference to drawings.

[0016] They show Fig. 1 a supporting structure according to the invention in perspective view, Fig. 2 a sectional view of the supporting structure according to Fig. 1, Fig. 3 a top view of the supporting structure according to Fig. 1, Fig. 4a and Fig. 4b a support bar in two side views arranged at 90° to each other, Fig. 5a and Fig. 5b a fastening tab in two side views arranged at 90° to each other, Fig. 6a and Fig. 6b a filling rod in two side views arranged at 90° to each other, Fig. 7a and Fig. 7b a penetration protection in two side views arranged at 90° to each other, Fig. 8a and Fig. 8b a leading edge in two side views arranged at 90° to each other.

[0017] As from Fig. As can be seen in Figure 1, the supporting structure has a grating floor 1 made of bearing bars and infill bars, two lateral fastening lugs 2, a leading edge 3 at the front, and a safety barrier 4 at the rear. In the example shown, the supporting structure has seven bearing bars extending between the fastening lugs 2 and 54 infill bars extending between the leading edge 3 and the safety barrier 4.

[0018] In the cutaway view of the Fig. 2 the seven support bars 5, a filler bar 6, the rear fastening tab 3, the leading edge 4 with the underlying U-profile 7 serving for stiffening and the penetration protection 4 can be seen.

[0019] The top view of the supporting structure of the Fig. Figure 3 shows the fastening tabs 3, the support bars 5, the filler bars 6 and the leading edge 4.

[0020] In Fig. 4a and Fig. Figure 4b shows a support bar 5 according to the invention. This bar has tapers 8 at its ends, which are formed by recesses in the upper and lower regions at both ends of the support bar 5. To avoid stress concentrations, the tapers 8 of the support bars 5 are provided with radii 9 at their base, in accordance with a low-notch geometry. The upper notches of the support bars 5 serve to insert the filler bars 6.

[0021] Fig. 5a and Fig. Figure 5b shows a fastening tab 2 with openings 10 for passing through the tapered sections of the support bars 5.

[0022] Fig. 6a and Fig. Figure 6b shows a filler bar 6 which also has tapers 11 at its ends, formed by recesses in the upper and lower regions at both ends of the filler bar 6. To avoid stress concentrations, the tapers 11 of the filler bars 6 are provided with radii 12 at their base, in accordance with a low-notch geometry.

[0023] Fig. 7a and Fig. Figure 7b shows a penetration guard 4, designed like a raised support bar, which is positioned at the end of the support structure opposite the leading edge 3. The openings 13 for inserting the tapered sections 11 of the infill bars 6 are visible.

[0024] Fig. 8a and Fig.Figure 8b shows a leading edge 14, which is designed as a stiffening U-profile and has openings 15 for receiving the tapered sections 11 of the infill bars 6. The leading edge 14 also has lateral tapered sections 16, which are inserted through corresponding openings in the fastening tabs 2 and connected to them.

[0025] The supporting structure is first assembled and then the individual elements are joined together by material bonding, whereby the support bars 5 are preferably welded to the fastening tabs from the outside and the filler bars are preferably connected to the leading edge 3 and the penetration protection 4 by tack welding. QUOTES INCLUDED IN THE DESCRIPTION

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

[0000] EP 3 660 239 A1

[0002] EP 4 549 677 A1

[0003]

Claims

[1] Supporting structure, in particular a stair step, with a grating floor (1), wherein the grating floor (1) has bearing bars (5) and infill bars (6) and is connected to two fastening tabs (2) as well as a leading edge (3) and a penetration guard (4), characterized by , that the support bars (5) have tapers (8) at their ends which are inserted through openings (10) in the fastening tabs (2) and connected to them. [2] Supporting structure according to claim 1, characterized by , that the filler rods (6) have tapers (11) at their ends which are inserted through openings in the leading edge (3) or the penetration protection (4) and connected to them. [3] Supporting structure according to claim 1 or claim 2, characterized by , that the tapered sections (8) of the support bars (5) are welded to the fastening tabs (2) from the outside. [4] Supporting structure according to any one of claims 1 to 3, characterized by, that the tapered sections (8) of the filler bars (6) are connected to the leading edge (3) or the penetration protection (4) by stapling. [5] Supporting structure according to any one of claims 1 to 4, characterized by , that the tapered sections (8) of the support bars (5) are provided with rounded sections (9) at their base. [6] Supporting structure according to any one of claims 1 to 5, characterized by , that the tapered sections (11) of the filler rods (6) are provided with rounded sections (12) at their base.

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