US20190040638A1

US20190040638A1 - Supporting framework

Info

Publication number: US20190040638A1
Application number: US16/076,861
Authority: US
Inventors: Markus Rupp
Original assignee: Peri GmbH
Current assignee: Peri GmbH
Priority date: 2016-01-22
Filing date: 2016-12-22
Publication date: 2019-02-07
Also published as: ZA201803761B; PH12018501358A1; CA3014798A1; EP3405627B1; PE20181483A1; DE102016200868A1; WO2017125238A1; AR107380A1; EP3405627A1; RU2018121097A; BR112018012896A2; CL2018001655A1; RU2018121097A3; CO2018006449A2

Abstract

A supporting framework having at least one connector and at least two bars arranged on the connector. The bars are preferably arranged on the connector at the longitudinal end regions thereof. The connection between the bars and connector is achieved by at least one bolt, in particular, by two bolts. The bolt is or the bolts are preferably designed in the form of plug-in bolts, in particular fit bolts. The bolt has or the bolts have preferably a diameter of more than 28 mm that acts in the connection to the connector. The bars are formed from a steel having an upper yield strength of above 490 MPa. The bar height is less than 200 mm. The bars, bolts, and connector are preferably part of a lattice truss of the supporting framework, wherein the lattice truss has a lattice truss height of at least 2100 mm.

Description

The invention relates to a supporting framework for bearing an allowable pressure force of between 100 and 1,000 kN per scaffolding post of the supporting framework that can be arranged on the ground, wherein the supporting framework comprises a connector, at least two bars, and a plurality of bolts, wherein the at least two bars are arranged on the connector so as to be reversibly releasable through in each case at least one bolt.
The use of supporting frameworks for such a medium load range is well known. Supporting frameworks of this type are used to support loads, for example, to support formwork into which concrete is poured to construct a building.
In order to be able to adapt the geometric shape of the supporting framework to the required conditions, supporting frameworks are assembled in a modular manner from individual parts that can be reversibly connected to one another. Bars that are connected indirectly to one another via connectors constitute a major component of the supporting frameworks.
So that the bars and connectors can support high loads, these components have in the prior art had large dimensions and correspondingly difficult configurations. Handling these supporting framework elements has therefore only been possible with a crane in the prior art. It has also been proposed in the prior art that each connector be arranged on a bar with six M16 screws. Screwing and later unscrewing these six screws per connection between bar and connector necessitates very considerable effort for assembly and disassembly.
The present invention, in turn, addresses the problem of providing a supporting framework that has components which are significantly easier to handle with the same load capacity.
This problem is solved by a supporting framework having the features of claim 1. The dependent claims set forth advantageous developments.
The problem according to the invention is thus solved by a supporting framework for the medium load range. The supporting framework according to the invention then entails a substantially rod-shaped structure for bearing a load with at least two bars, at least two bolts and at least one connector. At least two bars are arranged on a connector, through in each case at least one bolt. The bars are made of steel. The steel has an upper yield strength of more than 490 MPa. The bar height is less than 200 mm. The bar height is then measured perpendicular to the longitudinal axis of the bars. The bar height is furthermore measured perpendicular to the longitudinal axis of the at least one bolt that connects the bar to the connector.
According to the invention, it has thus been recognized that using steel having an upper yield strength of more than 490 MPa makes it possible to significantly reduce the bar height. This makes it possible to give the bars a much lighter configuration, thus making it possible to handle same without a crane. Reducing the bar height favored because of other options for connecting the bars to the connector—in particular, through the use of fit bolts—from those in the prior art.
In a preferred embodiment of the invention, the wall thickness of the two bars and/or the connector is significantly reduced by the use of a steel that has an upper yield strength of more than 490 MPa. The wall thickness is preferably less than 10 mm, in particular less than 8 mm, especially preferably less than 7 mm.
The bars of the supporting framework preferably have through recesses for receiving bolts.
The plurality of bars of the supporting framework are preferably composed of a steel that has an upper yield strength of more than 490 MPa. Further preferably, the plurality of bars of the supporting framework each have a maximum bar height of less than 200 mm.
In a preferred embodiment of the invention, the supporting framework is designed to bear a pressure force of between 200 and 600 kN per scaffolding post that can be set up on the ground. The supporting framework according to the invention is thereby positioned between a lightweight supporting framework—e.g., a façade framework—and a heavy supporting framework—e.g., for supporting formwork for large bridges.
Further preferably, the at least two bars may be composed of a steel having an upper yield strength of more than 540 MPa, and a bar height of less than 120 mm. This makes the bars especially light and easy to handle. The plurality of bars of the supporting framework are preferably composed of a steel that has an upper yield strength of more than 540 MPa. Further preferably, the plurality of bars of the supporting framework each have a maximum bar height of less than 120 mm.
In order to increase the buckling load capacity of the supporting framework according to the invention, the at least two bars may each have two U-profiles that are indirectly interconnected—in particular, welded to one another—at the central bottom regions of the U-profiles. The connector may then be plate-shaped and be accommodated in some sections between the U-profiles. The connector is preferably configured substantially in the form of a plate having a semicircular contour. As an alternative thereto, the connector may be configured in another form, for example, an angled form. The connector may be configured, for example, for the construction of an angled connection, in particular, a 90° angle. The plurality of bars of the supporting framework preferably each have two U-profiles, wherein each pair of U-profiles is respectively indirectly interconnected at the central ground regions of the U-profiles.
The connector may have at least seven coupling points arranged in a substantially semicircular manner in order to connect a bar to the connector. The coupling points are then preferably offset in each case by 30° from an adjacent coupling point. The coupling points are configured, in particular, in the form of through recesses for receiving the bolts. Because six screw bolts are generally used in the prior art in order to connect a single bar to the connector, typically only four coupling points have conventionally been configured on a semicircular connector, for space-related considerations. The plurality of connectors of the supporting framework preferably each have at least seven coupling points for arranging a bar with the respective connector.
At least a part of the at least two bars is preferably rolled, Le., produced by rolling. The at least partial production of the at least two bars by rolling method achieves high-precision manufacturing of the bars. In contrast, in the prior art, the bars are generally rolled, which makes it possible to achieve the advantages according to the invention only to a very limited degree or only with increased post-processing of the bars. In particular, the at least two bars are completely rolled. Further preferably, the plurality of bars of the supporting framework are rolled, in particular, each completely.
In an especially preferred embodiment of the invention, the at least two bolts each have a bolt diameter of more than 20 mm in the region thereof that engages with a bar, wherein the at least two bars are each connected to the connector by fewer than five bolts of the supporting framework. Thereby, the use of a small number of bolts makes it possible to achieve the load capacity of the supporting framework that is known from the prior art, wherein the supporting framework is much easier to assemble and disassemble due to the significantly lower number of bolts used. The plurality of bars are preferably each connected to a connector by fewer than five bolts. Further preferably, the plurality bolts each have a bolt diameter of more than 20 mm.
Further preferably, the at least two bolts have a bolt diameter of at least 30 mm. The plurality of bolts of the supporting framework preferably have a bolt diameter of at least 30 mm.
The at least two bolts may be configured in the form of screws. The at least two bars are preferably each configured in form of a plug-in bolt. The plug-in bolts preferably each have a safety splint. Plug-in bolts can be assembled and disassembled much faster than screws. Furthermore, the safety splints make it possible to immediately determine visually whether the bolts have been arranged correctly or not, because the safety splints can only be fastened when the bolts have been arranged correctly. In contrast thereto, a screw connection does not readily allow for visual inspection of whether the screw connection has been securely assembled or not.
Further preferably, the at least two bolts are each configured in the form of a fit bolt. The fit bolts allow for an especially rigid construction of the supporting framework. The connection of fit bolts is made possible, in particular, by the use of a steel for the bars that has an upper yield strength of more than 490 MPa.
Especially preferably, the at least two bars are each arranged on the connector by two bolts. The two bolts constitute a connection of the bar to the connector that is especially easy to assemble and disassemble, wherein the mechanical stability is maintained. The aforementioned bolts are preferably designed in the form of plug-in bolts, in particular, in the form of fit bolts. Further preferably, the plurality of bars are each arranged on a connector by two bolts. The supporting framework may comprise at least one lattice truss. The lattice truss has a plurality of previously-described bars and a plurality of previously-described connectors. The width of the lattice truss therefore substantially corresponds to the width of the bars. The lattice truss height, as measured perpendicular to the longitudinal direction is preferably greater than 2200 mm. Especially preferably, the lattice truss height is greater than 2400 mm. In the prior art, the lattice truss height is typically 2000 mm. The significantly greater lattice truss height makes it possible to select a still considerably smaller bar height than in the prior art, such that the lattice truss still has the same resistance to a buckling load.
In a further preferred embodiment of the invention, the supporting framework is configured in the form of a bridge. The bridge preferably has at least one lattice truss, in particular, a plurality of lattice trusses.
The supporting framework may comprise vertically-standing lattice trusses. For example, the supporting framework may be configured in the form of a tower. The tower then preferably has at least one lattice truss, in particular, a plurality of lattice trusses.
Further features and advantages of the invention arise from the following detailed description of an embodiment of the invention, from the claims, and from the drawings, which show details essential to the invention. The features shown in the drawings are depicted in such a manner that the specific characteristics of the invention can be made clearly visible. The different features may be embodied each individually, or in any combination thereof in variants of the invention.

In the drawings,

FIG. 1 illustrates a plant view of a bridge according to the invention, with a lattice truss according to the invention;

FIG. 2 illustrates a section from FIG. 1 that shows a connector with four bars arranged thereon;

FIG. 3 illustrates the section from FIG. 2, wherein two bars have been removed from the connector; and

FIG. 4 illustrates a section view of a bar from FIG. 3 along the line IV-IV.

FIG. 1 illustrates a bridge 10. The bridge 10 comprises scaffold towers 12 a, 12 b. The scaffold towers 12 a-b span a square base. The bases each have a side length L_sof between 1000 and 2000 mm. The height H_Gof the scaffold towers is up to 25000 mm. The span S_wof the bridge 10 is up to 25000 mm.
The bridge has at least one lattice truss 14 that is arranged between the scaffold towers 12 a-b. Preferably, the bridge 10 has a plurality of lattice trusses 14 that are arranged in parallel to one another and are arranged between the scaffold towers 12 a, 12 b. The lattice truss height F_Hof the lattice truss 14 is preferably 2500 mm. The longitudinal axis of the lattice truss 14 is marked with the reference sign 15 in FIG. 1.
The scaffold towers 12 a, 12 b have scaffolding posts 16 a, 16 b, 16 c, 16 d that are supported at the bottom. The bridge 10 is configured in order to support an allowable pressure force of up to 400 kN via the scaffolding posts 16 a-d. The bridge 10, which is schematically represented in FIG. 1, therefore involves a supporting framework 18 for a medium load range.
FIG. 2 shows a section 20 from FIG. 1. FIG. 2 is depicted as an example of a node of the lattice truss 14 (see FIG. 1). FIG. 2 illustrates a connector 22. The connector 22 is plate-shaped and has semicircular shape. Bars 24 a, 24 b, 24 c, 24 d are arranged on the connector 22. The bars 24 a-d are arranged on the connector 22 through bolts 26 a, 26 b, 26 c, 26 d, 26 e, 26 f, 26 g, 26 h. The bolts 26 a-h are in the form of fit bolts. The bolts 26 a-h each have a safety splint (not shown) in order to secure the bolts 26 a-h.
The bars 24 a-d are composed of S550MC steel, in order for the bars 24 a-d to be configured with a small cross-section. As an alternative thereto, the bars 24 a-d may preferably be composed of S500MC steel, S600MC steel, S650MC steel, S700MC steel, S900MC steel, or S960MC steel. Due to the small cross-section thereof, the bars 20 a-d are relatively light so as to allow for assembly and disassembly by workers without requiring aid from a crane.
FIG. 3 illustrates the section 20 according to FIG. 2 with the connector 22, but without the bars 24 c, 24 d arranged on the connector 22 (see FIG. 2). Coupling points 28 a, 28 b, 28 c, 28 d, 28 e, 28 f, 28 g are configured in the connector 22 in order to connect bars, e.g., the bars 24 a, 24 b to the connector 22, The coupling points 28 a-g each have at least one through recess. Preferably, the coupling points 28 a-g each have two through recesses, as shown in FIG. 2, wherein reference signs are provided in FIG. 3 only to the through recesses 30 a, 30 b of the coupling point 28 c for the sake of better visibility.
The through recesses of the coupling points 28 a-g, e.g., the through recesses 30 a, 30 b of the coupling points 28 a-g, each lie on lines that intersect in the center of the semicircular shape of the connector 22. For the sake of better visibility, a reference sign is provided in FIG. 3 only to a first such line 32 of the coupling point 28 c. The coupling points 28 a-g are each offset by 30° to the nearest adjacent coupling point 28 a-g in the semicircular shape of the connector 22. The bars 24 a, 24 b each have through recesses at longitudinal ends thereof, in order to receive the bolts 26 a-h (see FIG. 2). FIG. 3 depicts only a first through recess 34 of the bar 24 a, for the sake of better visibility. The longitudinal axis of the bar 24 a is marked in FIG. 3 with the reference sign 35.
FIG. 4 illustrates the cross-section of the bar 24 b (see FIG. 3). FIG. 4 makes it clear that the bar 24 b has U-profiles 36 a, 36 b. The U-profiles 36 a, 36 b are welded together via connecting plates 38 a, 38 b. In other words, the two U-profiles 36 a, 35 b are connected indirectly to one another at middle ground regions 40 a, 40 b thereof. The U-profiles 36 a, 36 b have a significantly reduced wall thickness in comparison to the prior art. In the longitudinal direction of the bar 24 b, a plurality of connecting plates 38 a, 38 b that are spaced apart from one another in the longitudinal direction of the bar 24 b may be arranged between the U-profiles 36 a, 36 b. The U-profiles 36 a, 36 b have a bar height H of less than 110 mm. This makes the bar 24 b especially easy to handle. A longitudinal axis of a bolt (not shown) connected to the bar 24 b in order to arrange the bar 24 b with another connector (not shown) is provided with the reference sign 42 in FIG. 3.
To summarize all of the drawings, the invention relates in summary to a supporting framework 18 having at least one connector 22 and at least two bars 24 a-d arranged on the connector 22. The bars 24 a-d are preferably arranged on the connector 22 at respective longitudinal end regions thereof. The connection between the bars 24 a-d and the connector 22 is achieved by at least one bolt 26 a-h, in particular, by two bolts 26 a-h. The bolt 26 a-h is or the bolts 26 a-h are preferably designed in the form of plug-in bolts, in particular, in the form of fit bolts. The bolt 26 a-h has or the bolts 26 a-h have preferably a diameter of more than 28 mm that acts in the plug-in connection to the connector 22. The bars 24 a-d are formed from a steel having an upper yield strength of above 490 MPa. The bar height RH is less than 200 mm. The bars 24 a-d, bolts 26 a-h, and connector 22 are preferably part of a lattice truss 14 of the supporting framework 18, wherein the lattice truss 14 has a lattice truss height F_Hof at least 2100 mm.

Claims

1-13. (canceled)

14. A supporting framework for bearing an allowable pressure force of between 100 and 1000 kN per scaffolding post, the supporting framework comprising: scaffolding posts arrangeable on the ground; a connector; at least two bars; and at least two bolts, wherein the at least two bars are each arranged on the connector reversibly and releasably by at least one of the bolts, wherein

a) the at least two bars are composed of steel having an upper yield strength of more than 490 MPa, and

b) a height of the bars, as measured perpendicular to a longitudinal axis of the at least two bolts and perpendicular to a longitudinal axis of the at least two bars, is less than 200 mm, wherein

c) the at least two bolts are each configured as a plug-in bolt.

15. The supporting framework according to claim 14, wherein the supporting framework is configured to bear an allowable pressure force of between 200 and 600 kN per scaffolding post.

16. The supporting framework according to claim 14, wherein the at least two bars are composed of a steel having an upper yield strength of more than 540 MPa, and the bar height is less than 120 mm.

17. The supporting framework according to claim 14, wherein the at least two bars each have two U-profiles that are indirectly interconnected at middle bottom regions of the U-profiles, wherein the connector is plate-shaped and accommodated in some sections between the U-profiles.

18. The supporting framework according to claim 14, wherein the connector is semicircular and has at least seven coupling points for connecting the bars to the connector, wherein the coupling points are offset in each case by 30° from an adjacent coupling point.

19. The supporting framework according to claim 14, wherein at least a part of the bars is rolled,

20. The supporting framework according to claim 14, wherein the at least two bolts each have a bolt diameter of more than 20 mm, and the at least two bars are each arranged on the connector by fewer than three of the bolts.

21. The supporting framework according to claim 20, wherein the at least two bolts each have a bolt diameter of at least 30 mm.

22. The supporting framework according to claim 14, wherein the at least two bolts are each configured as a fit bolt.

23. The supporting framework according to claim 14, further comprising a lattice truss having a plurality of bars and a plurality of connectors, wherein the lattice truss has a height, as measured perpendicular to a longitudinal axis of the lattice truss, greater than 2200 mm.

24. The supporting framework according to claim 14, wherein the supporting framework is configured as a bridge.