ITVI20130004A1 - RETICULAR BEAM FOR MOBILE OR STATIONARY MULTIFUNCTIONAL STRUCTURES AND THE STRUCTURE INCLUDING THIS BEAM - Google Patents

Description

DESCRIPTION

Field of application

[0001] The present invention is generally applicable to the technical construction sector and particularly relates to a modular reticular beam.

[0002] The invention also relates to a roofing structure comprising the aforementioned beam.

State of the art

[0003] The use of roofing structures comprising one or more reticular beams defining load-bearing and / or covering elements is known in the construction sector.

[0004] Typically, these structures are essentially formed by two or more vertical uprights that support a substantially horizontal frame or with inclined pitches, covered with panels or laminar roofing elements.

[0005] The modular conformation of the beams allows for the construction of large and relatively light structures, such as warehouses, hangars, control towers, terminals, bridges, horizontals or walkways for airports, airstations, railway stations or the like.

[0006] The truss beams are also used for the construction of mobile structures, designed to be assembled and disassembled in particularly short times and mainly used in industry as well as in the military or in emergency situations.

The trusses used in such structures must have a particularly flexible configuration and must be configured to support relatively high loads or overloads.

[0008] An example of a modular beam is known from FR1229772 formed by a pair of profiles with vertical ribs and horizontal fins, substantially parallel and rigidly connected by a reticular frame consisting of a plurality of longitudinally offset and inclined straight crosspieces, welded to the fins or to the central ribs of each profile.

[0009] The welding of the crosspieces to the profiles severely limits the possibility of modifying the dimensions as well as the overall strength of the beam at a later stage after its initial construction.

[0010] In fact, to increase the distance of the profiles or the number and pitch of the crosspieces it is necessary to unsolder and remove all the crosspieces, replacing them with others of different length or inclination, with the consequence of having to carry out all the welds again. We limit flexibility in use and destination, as well as in the construction times of the beam, as well as contributing in a non-negligible way to the increase in material and labor costs.

Presentation of the invention

[0011] The purpose of the present invention is to overcome the drawbacks encountered above by providing a reticular beam for mobile or stationary multifunctional structures which has characteristics of high efficiency and relative cheapness.

[0012] A particular object of the present invention is to provide a reticular beam for mobile or stationary multifunctional structures whose configuration can be easily modified and adapted in order to be able to realize roofing structures with different shapes and mechanical characteristics.

[0013] A further object of the present invention is to provide a reticular beam for mobile or stationary multifunctional structures which can be assembled in a rapid and reconfigurable manner.

[0014] Still another object of the present invention is to provide a reticular beam for mobile or stationary multifunctional structures that has a relatively high moment of inertia.

[0015] Still another object of the present invention is to provide a reticular beam whose mechanical characteristics, such as strength and moment of inertia, can be modified without resorting to the use of additional elements but through the reconfiguration of the beam itself.

[0016] A further purpose is to provide a reticular beam that allows to apply to the structure to which the beam is associated both an external covering element and an internal covering element, increasing the fire resistance and also allowing the application of barriers ballistic type.

[0017] A further object of the present invention is to provide a reticular beam for mobile or stationary multifunctional structures that can be completely dismantled and reassembled, formed by components whose dimensions allow to reduce the overall dimensions during the transport phases, allowing it to be transportable even with aircraft.

[0018] Not least object of the present invention is to provide a covering structure of considerable size and strength even without the use of welds.

[0019] These purposes, as well as others which will appear more clearly in the following, are achieved by a multifunctional reticular beam in accordance with claim 1, which comprises at least two mutually facing longitudinal load-bearing profiles, symmetrically arranged at a predetermined distance with respect to a plane of longitudinal symmetry, a plurality of transverse connecting profiles of predetermined length, arranged in a center plane substantially perpendicular to said plane of symmetry, said transverse connecting profiles having end portions connectable to said longitudinal profiles to define a unitary reticular structure;

[0020] The beam is characterized by the fact that said longitudinal supporting profiles have a pair of substantially parallel longitudinal lateral ribs and provided with a plurality of first longitudinally staggered through holes, said transversal connection profiles being inserted between said longitudinal ribs and having a plurality of second through holes made in correspondence with said end portions, selectively with said first holes for the passage of a plurality of fastening members, so as to determine the distance between said longitudinal profiles as a function of the number and length of said profiles of transversal connection, to correspondingly vary the moment of inertia and the structural resistance of the reticular structure.

[0021] Thanks to these characteristics, the reticular beam according to the invention will have a particularly flexible configuration with dimensions and strength adaptable to the various construction requirements of the roofing structure.

[0022] In particular, the beam can be assembled quickly and can be modified, at least in part, on site since it will not be necessary to provide welds for the connection between the various parts.

[0023] The presence of the ribs, in addition to simplifying and speeding up assembly, will have the further advantage of increasing the moment of inertia of the beam, improving its stability characteristics even in the presence of significant loads.

[0024] According to a further aspect of the invention, a mobile or stationary multifunctional structure according to claim 9 is provided.

[0025] Advantageous embodiments of the invention are made in accordance with the dependent claims.

Brief description of the drawings

[0026] Further characteristics and advantages of the invention will become more evident in the light of the detailed description of preferred but not exclusive embodiments of a multifunctional reticular beam of a roofing structure according to the invention, illustrated by way of non-limiting example with the aid of the joined drawing tables in which:

FIG. 1 is a side view of a portion of a part of a covering structure incorporating a beam according to the invention;

FIG. 2 is an enlarged view of a detail of the structure and beam of FIG. 1;

FIG. 3 is a sectional view of a beam of FIG. 2 according to the line 11-111;

FIG. 4a is an exploded perspective view of a detail of a beam of FIG. 2;

FIG. 4b is an assembled perspective view of the detail of FIG. 4a;

FIG. 5 is a perspective view of a stationary structure incorporating a plurality of beams according to the invention;

FIG. 6 is a sectional view of a detail of FIG. 5 according to the VI-VI track plan.

Detailed description of a preferred example of embodiment [0027] With reference to the attached figures, a multifunctional reticular beam according to the invention is illustrated, generally indicated with the reference number 1, intended to be used for the construction of fixed or mobile roofing structures, such as hangars, warehouses for industrial and military use, control towers in airports, air terminals, bridges, horizontals, walkways and the like.

[0028] An example of a multifunctional structure obtained by assembling reticular beams according to the invention is illustrated in FIG. 5, and essentially consists of a shed or hangar.

[0029] The beam 1 essentially comprises at least two longitudinal bearing profiles 2, 2 with respective axes X, X ', mutually facing and arranged symmetrically with respect to a plane of symmetry π at a predetermined distance S.

[0030] The longitudinal load-bearing profiles 2, 2 preferably but not necessarily have the same length and are connected to each other at the distance S from the plane of symmetry π by means of a plurality of transverse connecting profiles 3, 4 arranged in a center plane μ substantially perpendicular to the plane of symmetry TT.

[0031] In particular, the transverse connection profiles 3, 4 have a different inclination with respect to the two bearing profiles 2, 2 '. In the embodiment illustrated in the drawings, the profiles 3 are diagonal with an inclination angle a, a ', for example comprised between 10 ° and 60 ° with respect to the axes X, X' and have a length greater than that of the profiles 5 which are normal, i.e. substantially perpendicular to the same axes X, X '.

[0032] More particularly, the connection profiles 3, 4 have end portions 5, 6, respectively 7, 8 connected to the main longitudinal profiles 2, 2 ', as better illustrated in FIG. 2, so as to define a unitary reticular structure.

[0033] Conveniently, the longitudinal profiles 2, 2 'have a closed cross section of a special shape, with a tubular body 9, 9' having a polygonal cross section defining a central cavity 10, 10 '.

[0034] In the embodiment illustrated in the drawings, the cross section of the tubular body 9, 9 'is approximately rectangular, formed by a pair of side walls 12, 13, 12', 13 'joined by a pair of transverse walls 14, 15, 14 ', 15'.

[0035] According to the invention, the longitudinal bearing profiles 2, 2 'have a pair of longitudinal lateral ribs 16, 17, 16', 17 'which extend from the longitudinal edges of the tubular body 9, 9', as an extension of the side walls 12, 13, 12 ', 13'.

[0036] The longitudinal ribs 16, 17, 16 ', 17' extend throughout the longitudinal development of each profile 2, 2 ', are substantially parallel to each other and to the longitudinal axes X, X' and have a plurality of first through holes 18, 18 'distributed along a line substantially parallel to the outer edge of the ribs and longitudinally offset.

[0037] Thanks to these ribs 16, 17, 16 ', 17', the supporting profiles 2, 2 'will have a greater moment of inertia I and a greater resistance to bending in the development plane μ compared to normal tubular profiles normally in business.

[0038] The transverse connecting profiles 3, 4 are also obtained from tubular profiles, preferably with a rectangular cross section and with a maximum width D slightly less than the minimum distance W between the internal surfaces of the lateral ribs 16, 17, 16 ', 17 'and have a plurality of second through holes 19 at the end portions 5, 6, 7, 8.

[0039] To connect the longitudinal profiles 2, 2 'to each other, the end portions 5, 6, 7, 8 of the transverse connecting profiles 3, 4 can be inserted into the spaces between the longitudinal ribs 16, 17, 16', 17 'so as to selectively align the second holes 19 with the first holes 18, 18' of the longitudinal profiles 2, 2 '.

[0040] The mechanical connection can be carried out by inserting in the aligned holes suitable removable fastening members 20 of a per se known type, selected from the group comprising screws, bolts, nails, pins and other equivalent members, avoiding welding and obtaining a sufficiently rigid reticular structure, easy to assemble, disassemble and reassemble.

[0041] Furthermore, thanks to the modularity of the individual components, it will be possible to modify the shape, dimensions and structural strength of the beam 1 in a relatively easy and economical way, by varying both the distance S between the longitudinal profiles 2, 2 'and the length , the inclination, the mutual distance and the number of transversal connection profiles 3, 4, so as to obtain a multiplicity of modular beams with different characteristics.

[0042] To increase the longitudinal extension of the beam 1, multiple longitudinal profiles 2, 2 ’mutually aligned on the X, X’ axes can be joined together by means of special longitudinal connecting elements or joining cores 21.

[0043] As clearly shown in FIG. 4a, each core or longitudinal connection element 21 comprises a section of tubular section having a cross section substantially corresponding to the shape of the internal cavity 11, 11 'of the longitudinal bearing profiles 2, 2', and having pairs of side walls 22 and transverse 23.

[0044] On the at least one pair of lateral and transverse walls 22, 23, through holes 24 may be made substantially equidistant which can be aligned with corresponding holes 25 of the same type obtained in coordinated positions on the lateral and transverse walls of the terminal portions of the longitudinal profiles 2 , 2'

[0045] FIG. 4b shows the joint made, after having aligned the holes 22, 23 with the holes 24, 25 and having inserted in the suitable holes universal connecting members 26 of a per se known type, such as screws, bolts or nails.

[0046] Furthermore, the head-to-head connection of the longitudinal profiles 2, 2 'can be operated by the universal connection members 26 avoiding or limiting the use of external connection plates.

[0047] In the embodiment illustrated in the drawings, each longitudinal profile 2, 2 'is provided near the longitudinal edges opposite the ribs 16, 17, 16', 17 ', with a pair of continuous longitudinal grooves 27, 27' for the luff of locking rods 28, 28 'adapted to removably fix end portions of cover panels 29, 29' made of more or less flexible laminar materials, as shown in FIG. 6.

[0048] Furthermore, on at least one transverse wall of the external longitudinal profile 3, a suitably sized metal sheet 30 can be anchored to provide ballistic protection for the underlying structure.

[0049] In FIG. 5 shows an example of a multifunctional structure indicated as a whole 40, of the hangar or warehouse type for industrial or military use, obtained by assembling and connecting a plurality of structural elements 41.

In the embodiment illustrated in FIG. 5, each structural element 41 can comprise an upper portion or truss 42, essentially formed by a pair of reticular beams 1 of the type described above, inclined and joined at the ridge line C, at the ends of which lower upright portions are rigidly connected 44 for anchoring to the ground.

[0051] In FIG. 6 shows an example of connection of two adjacent beams beams 1, 1 'of a structural element 41, so that their center planes μ, μ' are substantially parallel and transversely offset by a predetermined distance N as a function of the dimensions of the beams 1, 1 'and their structural strength.

[0052] The connection can be made by means of at least a pair of currents 44 substantially parallel to the ridge line C perpendicular to the center planes μ, μ '.

[0053] The beams 44 may consist of sections of sections 45 provided at the ends at the opposite ends of anchor plates 46 for connection to the side walls 12, 13, 12 ', 13' of the adjacent beams 1, 1 '.

[0054] Conveniently, the reticular beam described above may be of the type compatible with the lateral protection system object of the European patent EP2412896 granted in the name of the same applicant.

[0055] From what has been described above, it is evident that the beam according to the invention achieves the intended purposes and in particular that of allowing the creation of arches with a considerable span and a high sustainable load.

[0056] The beam and the structure according to the invention are susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept expressed in the attached claims.

[0057] All the details can be replaced by other technically equivalent elements, and the materials can be different according to the requirements, without departing from the invention.

[0058] Although the reticular beam and the multifunctional structure according to the invention have been described with particular reference to the attached figures, the reference numbers used in the description and in the claims are used to improve the intelligence of the invention and do not constitute any limitation to the 'scope of protection

Claims (10)

CLAIMS 1. A truss beam (1, 1 ') for mobile or stationary multifunctional structures, comprising: - at least two main longitudinal profiles (2, 2 ') facing each other, symmetrically arranged at a predetermined distance (S) with respect to a longitudinal plane of symmetry (TT); - a plurality of transverse connecting profiles (3, 4) arranged in a center plane (μ) substantially perpendicular to said plane of symmetry (TT), said transverse connecting profiles (3, 4) having end portions (5, 6; 7, 8) connectable to said longitudinal profiles (2, 2 ') so as to define a unitary reticular structure; characterized in that said longitudinal profiles (2, 2 ') have a pair of lateral ribs (16, 17; 16', 17 ') substantially parallel and provided with a plurality of first through holes (18, 18') which are longitudinally offset, said transverse connection profiles (8, 9, 10) being insertable between said longitudinal ribs (16, 17; 16 ', 17') and having a plurality of second through holes (19) made in correspondence with said end portions (5 , 6; 7, 8), which can be aligned with said first holes (18, 18 ') for the passage of a plurality of fastening members (20) to selectively vary the distance (S) between said longitudinal profiles (2, 2') and the moment of inertia (I) of the beam as a function of the number and length of said transverse connection profiles (3, 4). 2. Beam according to claim 1, in which each of said longitudinal profiles (2, 2 ') comprises a substantially tubular body (9, 9') with a closed cross section defining a central cavity (10, 10 '). 3. Beam according to claim 2, wherein said tubular body (9, 9 ') has at least one pair of side walls (12, 13; 12', 13 ') joined by a pair of transverse walls (14, 15; 14) ', 15'), wherein said pair of longitudinal lateral ribs (16, 17; 16 ', 17') extends from the end edges of said tubular body (9, 9 ') as an extension of said side walls (12, 13; 12 ', 13'). 4. Beam according to any one of the preceding claims, in which said cross section of said longitudinal profiles (2, 2 ') is substantially polygonal and in which said universal fastening members (20) are selected from the group comprising the screws, the bolts , nails, pins and the like. Beam according to any one of claims 2 to 4, in which cores or longitudinal connecting elements (21) are provided for the head-to-head connection of adjacent longitudinal profiles (2, 2 '), in which each core (21) comprises a section of tubular profile with a cross section substantially corresponding to that of said central cavity (10, 10 ') which can be inserted precisely inside it and is provided with holes (24, 25) on its side faces for the passage of suitable universal connecting elements (26). 6. Beam according to any one of the preceding claims, wherein said transverse connecting profiles (3, 4) are substantially tubular with maximum width (D) substantially corresponding to the minimum distance (W) of said lateral ribs (16, 17; 16 ' , 17 '), to allow the insertion between the latter of said end portions (5, 6; 7, 8). 7. Beam according to any one of the preceding claims, wherein said longitudinal profiles (2, 2 ') have a pair of longitudinal grooves ( 27, 27 ') for luffing locking bars (28, 28') of laminar cover elements (29, 29 '). 8. Beam according to any of the preceding claims, in which a metal sheet (30) with ballistic protection function is anchored on at least one transverse wall (14) of one of said longitudinal profiles (2, 2 '). 9. A mobile or stationary multifunctional spatial structure (40), of the hangar, control tower, bridge, horizontal, walkway, air terminal or similar type, characterized in that it comprises a plurality of structural elements (41) incorporating one or more beams trusses (1, 1 ') according to one or more of the preceding claims, with center planes (μ, μ') substantially parallel and transversely offset by a predetermined pitch (N), said beams (1, 1 ', 1 ") being rigidly coupled by means of a plurality of beams (44) extending along directions substantially perpendicular to said center planes (μ, μ ') of said beams. Structure according to claim 10, wherein said beams (44) comprise sections of sections of length substantially corresponding to said pitch (N) and at the opposite ends of which anchor plates (46) are fixed for the connection in pairs of adjacent ones ( 1, 1)