Metal section bar and support structure of a suspended ceiling

Abstract

Metal profile for a suspended ceiling, comprising, in a double-wall configuration, a main portion and an integral coupling element connected as one piece to at least one end of said main portion, wherein the main portion and the integral coupling element define a direction of longitudinal extension of the metal profile. The main portion comprises a slot. The integral coupling element includes a plate-like portion defining a plane and at least one coupling fin and at least one locking fin made as one piece with the plate-like portion, wherein the coupling fin protrudes from the plane defined by the plate-like portion and the locking fin protrudes from the plane defined by the plate-like portion.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of priority from Italian Patent Application No. 102024000022356, filed Oct. 8, 2024, the contents of which are incorporated herein by reference.FIELD OF THE INVENTION

[0002] The present invention relates in general to the sector of support structures, or load-bearing structures, for suspended ceilings. In particular, the present disclosure relates to a metal profile and a support structure comprising a plurality of metal profiles, joined together and intersecting each other so as to form ideally a supporting surface for panels, or slabs, defining a suspended ceiling.BACKGROUND OF THE INVENTION

[0003] It is known that a metal profile for structures supporting suspended ceilings is an article with an elongated shape having a cross-section in the form of an overturned “T” or other shape suitable for a suspended ceiling, for example of the modular type, in which the profile is obtained by folding a metal sheet or strip.

[0004] Such a metal profile is provided, at one of its ends, with a coupling element.

[0005] The coupling element may consist of a mounted clip, namely the body of the metal profile is made of one material, while the body of the clip, or the coupling element, is made of another material and has a thickness different from that of the profile. In order to mount the clip on the profile usually the galvanized contour of corresponding holes for engagement of the clip is deformed, for example using a series of dies which punch, deform and press the deep-drawn part which is created in these engagement holes.

[0006] Alternatively, the coupling element may be made as one piece with the profile, and therefore without using an associated clip.

[0007] In general, each metal profile, in a central zone of its main body, is provided with a slot inside which the coupling elements of two other profiles are engaged in order to create a support structure.

[0008] In particular, the slot is shaped so as to have teeth, protrusions, partitions or other coupling elements for correct locking of the coupling elements, which must in any case also ensure a mechanically tight connection between them.

[0009] In fact, two coupling elements, each belonging to a different profile, are inserted inside each slot. More specifically, the two profiles are engaged inside the slot, arranged opposite each other, so that the respective coupling elements intersect each other correctly and are locked together in the correct position.

[0010] The coupling together of the slot and the coupling elements however has the drawback that it is not very practical and easy for the installation worker who is standing, for example, at the top of a staircase and has to force the coupling elements inside the slot above his / her head. In fact, the installation worker has to pay particular attention to the specific shape of the slot, which has protrusions, teeth and the like, and any minor problem risks causing series difficulties for the installation worker.

[0011] Moreover, it is also required to be able to disconnect easily a coupling element from the slot during disassembly of the support structure. In this case also, there is the drawback that it is difficult for the workman to be able to see when a coupling element is correctly disengaged from another metal profile.

[0012] In particular, at the time of disengagement of a coupling element, a workman often has to use an instrument or a tool, such as a screwdriver, in order to release the coupling element from the other metal profile, for example by exerting a pulling force on the coupling element itself. During the disengagement operation, in view of the particular configuration of the slot, the coupling element may be subject to an excessive amount of force exerted by the instrument or tool used until deformation of the material of coupling element occurs. This has the drawback of complicating, or in some cases preventing, the possibility of being able to reuse the coupling element and therefore the entire metal profile.SUMMARY OF THE INVENTION

[0013] The present disclosure therefore has as its starting point the technical problem of providing a metal profile for suspended ceilings which is able to overcome the aforementioned drawbacks with reference to the prior art and / or achieve further advantages or characteristic features.

[0014] Said technical problem may be solved by means of a profile for suspended ceilings and a support structure for a suspended ceiling as described herein Particular embodiments forming the subject of the present disclosure are defined in the claims.

[0015] In particular, a metal profile for a suspended ceiling is provided, including or comprising, in a double-wall configuration, a main portion and an integral coupling element connected as one piece with at least one end of said main portion, wherein the main portion and the integral coupling element define a direction of longitudinal extension of the metal profile. In other words, the metal profile extends along a main extension direction defined at least by the main portion of the said metal profile. The integral coupling element therefore constitutes an extended or prolonged end part of the main portion. The integral coupling element with the coupling function extends as far as a free end edge of the metal profile for a suspended ceiling.

[0016] The integral coupling element includes a plate-like portion which extends in the direction of longitudinal extension towards said free edge end. The plate-like portion defines a plane and includes at least one coupling fin and at least one locking fin made as one piece with the plate-like portion. In other words, the integral coupling portion comprises a plate-like portion which with its body defines a plane. Moreover, the integral coupling element comprises at least one coupling fin and at least one locking fin which are made as one piece, or as a single body, with the plate-like portion.

[0017] The coupling fin is protruding with respect to the plane defined by said plate-like portion and the locking fin is protruding with respect to the plane defined by the plate-like portion. Namely the coupling fin and the locking fin project from the plane defined by the plate-like portion.

[0018] In this way, the coupling fin defines a coupling axis and is configured to interfere with another metal profile in a coupling condition. In other words, the coupling fin is arranged along a coupling axis.

[0019] The locking fin defines a locking axis and is configured to interfere with another integral coupling element of another metal profile in a locking condition. In other words, the locking fin is arranged along a locking axis, which is different from and does not interfere with the coupling axis.

[0020] More specifically, said coupling fin and said locking fin protrude on opposite sides from the plane defined by said plate-like portion. Moreover, in accordance with one aspect of the present disclosure, the coupling fin and the locking fin are offset with respect to each other, and the coupling axis and the locking axis extend parallel along the direction of longitudinal extension of the respective metal profile, being spaced from each other.

[0021] In other words, the coupling fin and the locking fin are offset with respect to each other on two levels, wherein the levels are defined by the coupling axis and the locking axis.

[0022] In order to create the locking action, even more precisely, the plate-like portion has a counter-locking recess arranged on said locking axis and designed to receive a locking fin of another metal profile identical to said metal profile for a suspended ceiling, so as to determine a locking condition. The counter-locking recess is arranged in a position closer to the free edge end of said plate-like portion than the locking fin.

[0023] In other words, precisely in order to perform two different functions, but at the same time, create a solid locking and coupling action without interfering with the respective function, the coupling fin and the locking fin project from opposite sides of the plane defined by the plate-like portion and operate on two different levels. In this way, the coupling fin may, once it has been inserted in the slit of a profile (namely of a profile which is located transverse to the profile according to the present patent application), engage with the walls of another profile identical (to the profile according to the present patent application) which are inside the slit. The locking fin may instead cooperate with the recess which is located in the plate-like portion of another profile which is inserted inside the same slit.

[0024] Consequently, owing to the geometry of the aforementioned parts, the coupling fin faces the wall of the transverse profile, while the locking fin faces the empty zone of the slit so as to be able to interact with the counter-locking recess of the other profile.

[0025] In other words, the locking fin of one metal profile is designed to be inserted inside a counter-locking recess of another metal profile in the locking condition.

[0026] In this way, there is the advantage that stable locking together of two metal profiles is ensured while they are in a locking condition or position.

[0027] The counter-locking recess is preferably a through-hole, which allows stable locking together with the locking fin. The insertion of the locking fin inside the counter-locking recess ensures a stable locking action, much more so than that which would be obtained from mutual locking together of two locking fins.

[0028] Moreover, owing to the fact that the locking fin is inserted inside the counter-locking recess in the locking condition, an overall locking system which occupies little space is obtained and the size of the slot / slit of the transverse profile may also be reduced. Also a smaller size of the slot / slit of the transverse profile helps ensure a greater stability of the entire coupling and locking action.

[0029] As a result, according to the present invention, the coupling fin and the locking fin are not aligned with each other and lie respectively on a coupling axis and a locking axis which extend along a direction of longitudinal extension and which are parallel to and spaced from each other.

[0030] In this way there is the advantage of having an integral coupling element of a metal profile which allows stable coupling with the metal profile in the coupling condition and solid locking together with the metal profile in the locking condition, since the coupling action and locking action occur on two different levels, and may be at the same time a stable coupling action and stable locking action, respectively. Such a connection method is also simple to perform and allows rapid release. For release, it is in fact sufficient to operate the coupling fin and then move the entire integral coupling element in order to release the locking fin from the counter-locking recess.

[0031] In the light of the explanation provided above it is pointed out that “metal profile in the coupling condition” is understood as meaning a metal profile designed to engage with another metal profile, wherein the engagement occurs between the integral coupling element of a metal profile and a slot / slit of the other metal profile.

[0032] Moreover, it is pointed out that “metal profile in the locking condition” is understood as meaning a metal profile designed to be locked together with another profile, wherein the locking occurs between the respective integral locking elements arranged opposite each other.

[0033] Preferably, the coupling fin has a respective hinged side connected to the plate-like portion and is detached, or separated, from the plate-like portion on the remaining sides of the said coupling fin. In other words, the coupling fin is connected as one piece to the plate-like portion by means of a respective hinged side.

[0034] Preferably, the locking fin is a portion obtained by means of deep-drawing, namely the locking fin is a drawn part, or drawn portion, formed in said plate-like portion. The drawn portion is therefore integrally fixed as a single piece by means of respective connecting sides to said plate-like portion. Consequently, owing to the deep-drawing, the locking fin is detached on one side only from the plate-like portion and is joined integrally to the plate-like portion on the remaining sides.

[0035] The deep-drawing provides the integral coupling element with a very solid locking action and allows locking action to be modified by acting on the entire integral coupling element. Namely, in order to release the joint, the integral coupling element must be moved, this ensuring even more the overall locking action.

[0036] Moreover, preferably, the coupling fin and the locking fin are offset with respect to each other also along a direction transverse, or perpendicular, to said coupling axis or said locking axis. In other words, the coupling fin and the locking fin are not aligned with each other along a direction perpendicular to the coupling or locking axis. In this way, it is possible to operate the coupling fin and the locking fin in a varying manner.

[0037] Moreover, preferably, as mentioned above, the coupling fin is displaceable by means of elastic deformation between a first position, in which it is in a rest condition protruding with respect to the plate-like portion, and a second position, in which it is in an elastically deformed condition displaced towards said plate-like portion. Therefore the coupling fin is displaced with respect to the plate-like portion. On the contrary, preferably, the locking fin is displaceable by means of elastic deformation acting on the entire plate-like portion.

[0038] In other words, the locking fin of one metal profile is designed to be inserted inside a counter-locking recess of another metal profile in the locking condition and to be moved with respect to the recess together with the entire plate-like portion. In this way, there is the advantage that stable locking together of two metal profiles is ensured while they are in a locking condition or position.

[0039] In other words, the locking fin of a metal profile is inserted inside a counter-locking recess of another metal profile in a locking condition and stable locking together of two metal profiles is ensured while they are in a locking condition or position, and unlocking may occur only by operating the entire plate-like portion.

[0040] Preferably, the recess may be arranged along the locking axis and is aligned with the coupling fin along a direction transverse, or perpendicular, to the locking axis. More preferably, the recess is aligned with the coupling fin along a direction perpendicular to the locking axis.

[0041] Preferably, the integral coupling element comprises a security fastening made as one piece with said plate-like portion and configured to define a joining point, or fixing point, for the two walls of said integral coupling element, keeping them stably connected together. More specifically, the security fastening is defined by portions of the two walls of the integral coupling element which are folded onto each other. The fastening is substantially a cut or folded part of the integral coupling element which creates a further interference by means of folding.

[0042] Preferably, the security fastening protrudes with respect to the plane defined by the plate-like portion on the same side as the coupling fin and is arranged along said coupling axis, aligned with the locking fin along a direction transverse, or perpendicular, to the coupling axis. In other words, the security fastening is arranged aligned with the locking fin along a direction perpendicular to the coupling axis.

[0043] Moreover, preferably, the integral coupling element comprises a first reinforcing and guiding rib and a second reinforcing and guiding rib which are made as one piece with said plate-like portion. The ribs are configured both to provide the plate-like portion with sufficient rigidity and to cooperate with another metal profile in the coupling condition, keeping the plate-like portion in a position aligned with the latter. In other words, the plate-like portion is provided with a first rib and a second rib which are configured to cooperate with opposite parts of another metal profile in the coupling condition. In this way, the metal profile offers the advantage that it is easy to engage or disengage with / from another metal profile, without the installation worker having to perform complicated manoeuvres.

[0044] The present invention also relates to a support structure which comprises at least one pair of metal profiles as described above, which are aligned with each other, and a third metal profile associated at right angles with said pair of metal profiles.

[0045] Preferably, at least the third metal profile comprises a slot for receiving the integral coupling elements of the metal profiles of said pair, thus resulting in a cross-like configuration, wherein the metal profiles of said pair are arranged opposite each other and coupled with opposite sides of said third metal profile by means of cooperation of the respective coupling fins with the slot, and wherein the metal profiles are stably locked together by means of the respective locking fins accommodated inside the respective counter-locking recesses.

[0046] In other words, the support structure for suspended ceilings is defined by cross-like configurations or substructures, which comprise a pair of metal profiles aligned with each other and a third metal profile at right angles thereto. It is pointed out that the metal profiles of said pair are associated with the third profile on opposite sides. Moreover, the stable coupling together of the two metal profiles of said pair and the third profile is performed by inserting the coupling fins of the two profiles into a corresponding portion of the slot of the third profile. Instead, the stable locking together of the two metal profiles of said pair is performed by inserting the locking fin inside the corresponding counter-locking recess of the opposite metal profile.

[0047] In accordance with embodiments, the metal profiles of said pair and the third metal profile are identical to each other.

[0048] Preferably, the slot extends with a symmetrical shape along a direction of transverse extension, perpendicular to the direction of longitudinal extension. Namely, the slot has a symmetrical shape with respect to a direction of transverse extension, which is perpendicular to the direction of longitudinal extension of the main portion.

[0049] Preferably, the slot comprises:

[0050] at least one coupling portion having a respective first width, considered in the direction of longitudinal extension of the main portion, configured to allow insertion of the coupling fins of the two integral coupling elements of the pair of metal profiles;

[0051] at least one guide portion having a respective second width, considered in the direction of longitudinal extension of the main portion, configured to guide the insertion of the opposite integral coupling elements of the pair of metal profiles;

[0052] at least one engagement portion interposed between the coupling portion and the guide portion along said direction of transverse extension and having a respective third width less than said first width and said second width so as to define, in the slot, a first pair of protrusions, between the engagement portion and the coupling portion, and a second pair of protrusions, opposite to the first pair of protrusions, between the engagement portion and the guide portion.

[0053] In other words, the slot comprises an engagement portion interposed between a coupling portion, inside which the coupling fins of opposite integral coupling elements of the pair of two profiles can be inserted, and a guide portion, inside which the first rib portions of said integral coupling elements can be inserted.

[0054] Namely, each coupling fin is able to be inserted inside a corresponding part of the coupling portion.

[0055] Preferably, the coupling portion is configured to allow the insertion, but not the release, of the coupling fins of two opposite integral coupling elements of the pair of other metal profiles.

[0056] Preferably, the coupling portion is spaced in relation to, i.e. at a distance from, said guide portion along the direction of transverse extension. Namely, the coupling portion and the first guide portion are spaced from each other along the direction of transverse extension.

[0057] The slot therefore has inner linear edges without teeth or other engaging elements which make joining together of the metal profiles difficult or slower. In this way, by combining the simple shape of the slot with the arrangement of the coupling fin and the locking fin, there is the advantage that assembly and disassembly of the support structure is simple and rapid.BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Further characteristic features and modes of use forming the subject of the present disclosure will become clear from the following detailed description of examples of embodiment thereof, provided by way of a non-limiting example.

[0059] It should also be understood that the scope of the present disclosure includes all the possible combinations of embodiments described with reference to the following detailed description.

[0060] Reference will be made to the figures of the attached drawings in which:

[0061] FIG. 1 is a front axonometric view of a metal profile for a suspended ceiling according to the present disclosure;

[0062] FIG. 1A is an enlarged axonometric view of FIG. 1 showing in detail the integral coupling element of the metal profile;

[0063] FIG. 2 is an axonometric rear view of the metal profile of FIG. 1;

[0064] FIG. 3 is a side view of the metal profile according to FIG. 1 showing a coupling slot in detail;

[0065] FIG. 4 is an axonometric view of a support structure part according to the present disclosure for supporting a suspended ceiling;

[0066] FIG. 5 is another axonometric view of the support structure according to FIG. 4.DETAILED DESCRIPTION OF THE INVENTION

[0067] With reference to the attached figures, the reference number 100 denotes a support structure for a suspended ceiling including at least one pair of metal profiles according to the present disclosure. The metal profiles are denoted by the reference number 10, 110, 210. Preferably, the support structure 100 includes three or more metal profiles 10, 110, 210.

[0068] Each metal profile 10, 110, 210 has a double-wall configuration and comprises a long main portion 11. Moreover, the metal profile 10, 110, 210 comprises at least one integral coupling element 12, 112, 212 connected as one piece to at least one end of the main portion 11. In other words, each metal profile 10, 110, 210 includes a main portion or body 11 at the end of which an integral coupling element 12, 112, 212 is connected as a single body or as one piece.

[0069] According to embodiments, each profile 10, 110, 210 may comprise two integral coupling elements 12, 112, 212 which are identical to each other, at the respective terminal ends.

[0070] It can be seen that, in the embodiments shown here, the metal profiles 10, 110, 210 have a cross-section in the form of an overturned “T” and are obtained by folding a metal sheet or metal strip so as to obtain a superimposed arrangement of two sheet or strip portions defining the double-wall structure. Namely, the double-wall structure of each metal profile 10, 110, 210 is obtained by superimposing two metal sheet or metal strip portions which are joined or united together. The cross-section in the form of an overturned “T” is defined by an upright straight element and by a base with two arms projecting from the straight element. In the example provided here, in the top part of the overturned “T”, i.e. at the distal end of the upright straight element, there is a hollow round part.

[0071] According to other embodiments, the metal profiles 10, 110, 210 may be different from those shown, for example with a different T-shaped cross-section / form specific for modular suspended ceilings.

[0072] For example, each metal profile 10, 110, 210 may comprise fastening points or elements 13 arranged in pairs along the main portion 11. These fastening points 13 allow the stable coupling and joining together of the two walls which define the double-wall structure.

[0073] The main portion 11 and the integral coupling element 12, 112, 212 define a direction of longitudinal extension DL of the corresponding metal profile 10, 110, 210. In other words, each metal profile 10, 110, 210 is an elongated product and extends in a direction of longitudinal extension DL defined by the main portion 11 and by the integral coupling element 12, 112, 212. Namely, the main portion 11 and the integral coupling element 12, 112, 212 extend along a direction of longitudinal extension DL.

[0074] Preferably, the metal profiles 10, 110, 210 are metal profiles intended to form a cross-like metal support structure 100, i.e. with a cross-shaped configuration.

[0075] Each metal profile 10, 110, 210 may comprise a coupling slot 15, formed in the respective main portion 11 and configured to receive at least one integral support element 12, 112, 212 of another metal profile 10, 110, 210.

[0076] Preferably, the slot 15 is configured to receive two integral coupling elements 12, 112, 212 arranged opposite each other and each forming part of a corresponding metal profile 10, 110, 210, as will be described in detail below. It is pointed out that the expression “arranged opposite each other”, in connection with the integral coupling elements 12, 112, 212, is understood as meaning that they are inserted inside the slot 15 on opposite flanks or sides of the main portion, each coupling element forming part of a corresponding metal profile 10, 110, 210.

[0077] For example, a respective integral coupling element 12, 112 of a first metal profile may be inserted inside a slot 15 of another, or third, metal profile 210 having substantially the function of a supporting profile. In this way, the first metal profile 10, 110 is engaged with an edge which defines the slot 15 in the third metal profile 210. In the same slot 15, on the other side of the third metal profile 210, another integral coupling element 112, 12 of a second metal profile 110, 10 may be inserted in order to form an intersection zone or a cross-like configuration of a support structure 100 for a suspended ceiling, as will be described further below.

[0078] It is pointed out that the terms “first”, “second” and “third” metal profile must be regarded as being non-limiting and are used only for the purposes of easier understanding of the present disclosure.

[0079] Preferably, all the metal profiles 10, 110, 210 are identical to each other. Advantageously, this means that any metal profile 10, 110, 210 may be used as a profile having a load-bearing function.

[0080] According to other embodiments, the profile with a load-bearing function may be different from the other two profiles.

[0081] Preferably, the slot 15 is the same for all the profiles 10, 110, 210. Therefore, it is obvious that the slot 15 is a common characteristic feature of the present disclosure and is to be regarded as included in all the metal profiles 10, 110, 210.

[0082] Moreover, preferably, the integral coupling element 12, 112, 212 is the same for all the profiles 10, 110, 210 and will be described with reference to FIG. 1A. Therefore, it is obvious that the integral coupling elements 12, 112, 212 is a common characteristic feature of the present disclosure and is to be regarded as included in all the metal profiles 10, 110, 210.

[0083] Each integral coupling element 12, 112, 212 includes, or comprises, a plate-like portion 20 which extends along the longitudinal direction as far as a free end edge. The plate-like portion 20 defines a plane P.

[0084] The plate-like portion 20 includes at least one coupling fin 21 and at least one locking fin 22 made as one piece with the plate-like portion 20. In other words, the integral coupling element 12, 112, 212 comprises a plate-like portion 20 which, with its body, defines a plane P. Moreover, the integral coupling element 12, 112, 212 comprises at least one coupling fin 21 and at least one locking fin 22 which are formed as one piece, or a single body, with the plate-like portion 20.

[0085] The coupling fin 21 defines a coupling axis G. In other words, the coupling fin 21 is arranged on a coupling axis G.

[0086] The coupling fin 21 is protruding with respect to the plane P defined by the plate-like portion 20 and is configured to interfere with another metal profile 10, 110, 210 in a coupling condition. In other words, the coupling fin 21 projects from the plate-like portion 20 so as to interfere with another metal profile 10, 110, 210 arranged in a coupling condition. By way of example, in order to understand better the present disclosure, the third profile 210 may be regarded as being a profile in the coupling condition.

[0087] Preferably the coupling fin 21 has a respective hinged side 25 connected to the plate-like portion 20 and is detached or separated from the latter on the remaining sides 26, 27, 28. In other words, in the embodiment shown here, the coupling fin 21 has a parallelepiped or quadrilateral shape and comprises four sides, wherein three sides 26, 27, 28 are detached from the plate-like portion 20 and the hinged portion 25 is connected to the latter.

[0088] For example, as shown in FIG. 1A, the coupling fin 21 has two bigger sides 26, 27 which are a mirror-image of each other and converge towards a smaller side 28 opposite to the hinged side 25. It is clear that, in other embodiments, not shown, the coupling fin 21 may have other suitable forms.

[0089] For example, the coupling fin 21 of the first metal profile 10, 110 is configured to interfere with the third metal profile 210. In the same way, the coupling fin 21 of the second metal profile 110, 10 is also configured to interfere with the third metal profile 210. Namely, the coupling fin 21 of the first metal profile 10, 110 and the coupling fin 21 of the second metal profile 110, 10 are configured to interfere with a corresponding part or portion of the slot 15 of the third metal profile 210, as will be described in greater detail below.

[0090] The locking fin 22 defines a locking axis B. In other words, the locking fin 22 is arranged on a locking axis B.

[0091] The locking fin 22 is protruding with respect to the plane P defined by the plate-like portion 20 and is configured to interfere with an integral coupling element 12, 112, 212 of another metal profile 10, 110, 210 in a locking condition. In other words, the locking fin 22 projects from the plate-like portion 20 so as to interfere with an integral coupling element 12, 112, 212 of another metal profile 10, 110, 210 in a locking condition. By way of example, in order understand better the present disclosure, the first metal profile 10, 110 may be regarded as the reference profile and the second profile 110, 10 as the profile in the locking condition.

[0092] Preferably, the locking fin 22 is a deep-drawn portion detached on a respective single side 30 and connected to the plate-like portion20 on the remaining sides 31, 32. In other words, in the embodiment shown here, the locking fin 22 has a substantially triangular shape and comprises three sides, wherein two inclined sides 31, 32 are attached on the plate-like portion 20 and the side 30 is a free edge detached form the plate-like portion 20. It is clear that, in other embodiments, not shown, the locking fin 22 may have other suitable forms.

[0093] In accordance with one aspect of the present disclosure, the coupling fin 21 and the locking fin 22 are offset with respect to each other, and the coupling axis G and the locking axis B extend parallel along the direction of longitudinal extension DL of the corresponding metal profile 10, 110, 210, being spaced and parallel to each other.

[0094] In other words, the coupling axis G on which the coupling fin 21 lies and the locking axis B on which the locking fin 22 lies are parallel to the direction longitudinal extension DL are parallel to and spaced from each other, so that the coupling fin 21 and the locking fin 22 are positioned offset with respect to each other. Namely, the coupling fin 21 and the locking fin 22 are not aligned with each other and lie respectively on a coupling axis G and a locking axis B which extend along the direction of longitudinal extension and which are parallel and spaced from each other.

[0095] Expressed in other words, considering the overturned “T” cross-section of the metal profile 10, 110, 210, the offset arrangement of the coupling fin 21 and the locking fin 22 is considered in a direction which extends from the base of the overturned “T” to the top.

[0096] In this way there is the advantage of having an integral coupling element 12, 112, 212 of a metal profile 10, 110, 210 which allows stable coupling to the metal profile in the coupling condition and solid locking together with the metal profile in the locking condition, since coupling and locking occur on two different levels, where the two levels are substantially defined by the coupling axis G and the locking axis B. Said coupling mode is, moreover, simple to perform and allows rapid release.

[0097] The coupling fin 21 and the locking fin 22 also protrude on opposite sides with respect to the plane P defined by the plate-like portion 20. In other words, the coupling fin 21 and the locking fin 22 project from opposite sides of the plate-like portion 20.

[0098] Moreover, preferably, the coupling fin 21 and the locking fin 22 are offset with respect to each other also along a direction transverse, or perpendicular, to the coupling axis G and the locking axis B. More preferably, the coupling fin 21 and the locking fin 22 are offset with respect to each other also with reference to a direction perpendicular to the coupling axis G and the locking axis B. In other words, the coupling fin 21 and the locking fin 22 are not aligned with each other along a direction perpendicular to the coupling axis G, or locking axis B.

[0099] Preferably, at least the coupling fin 21 is displaceable by means of elastic deformation between a first position, in which it is in a rest condition protruding with respect to the plate-like portion 20, and a second position, in which it is in an elastically deformed condition displaced towards said plate-like portion 20. In other words, at least the coupling fin 21 may be elastically displaced from a first position, in which it is protruding with respect to the plate-like portion 20, into a second position, in which it is elastically deformed and displaced towards the same plate-like portion 20, and vice versa.

[0100] According to embodiments, at least the locking fin 22 of a metal profile 10, 110, 210 is displaceable elastically together with the entire plate-like portion 20 of the metal profile 10, 110, 210.

[0101] According to other embodiments, both the coupling fin 21 and the locking fin 22 of one profile 10, 110, 210 are displaceable, or elastically deformable, so as to ensure correct coupling and locking together with other metal profiles 10, 110, 210.

[0102] The plate-like portion 20 of a profile 10, 110, 210 has a counter-locking recess 35 designed to receive the locking fin 22 of another metal profile 10, 110, 210 in a locking condition. In other words, the locking fin 22 of one profile 10, 110, 210 is designed to be inserted inside a recess 35, which in fact in the example is a through-hole, formed in the plate-like portion 20 of the integral coupling element 12, 112, 212 of another metal profile 10, 110, 210, in order to stably lock together two metal profiles 10, 110, 210.

[0103] For example, the locking fin 22 of the first metal profile 10, 110 is configured to interfere with, i.e. be inserted inside, said counter-locking recess 35 of the second metal profile 110, 10, being inserted inside it. Vice versa, the locking fin 22 of the second metal profile 110, 10 is configured to interfere with, i.e. be inserted inside, said counter-locking recess 35 of the first metal profile 10, 110.

[0104] The recess 35 has a shape suitable for accommodating the locking fin 22, ensuring correct locking thereof. For example, the recess 35 may have a shape matching that of the locking fin 22, i.e. substantially triangular, where the inclined sides are curved.

[0105] Preferably, the recess 35 is arranged along the locking axis B and aligned with the coupling fin 21 along a direction transverse, or perpendicular, to the locking axis B. In other words, the recess 35 is formed alongside the locking fin 22 of a same plate-like portion 20 and aligned with the coupling fin 21 along a direction perpendicular to the locking axis B.

[0106] In this way, the metal profile 10, 110, 210 offers the advantage that it is easy to lock together with another metal profile 10, 110210, without the installation worker having to perform complicated operations or manoeuvres. Moreover, by locking the locking fins 22 inside the corresponding counter-locking recesses 35, any longitudinal movement of two metal profiles 10, 110, 210 which have been joined together is prevented and a tensile strength greater than the current standards is ensured.

[0107] Preferably, each metal profile 10, 110, 210 comprises a security fastening 37 made as one piece, or as a single body, with the plate-like portion 20. Advantageously, the security fastening 37 is configured to define a fastening point, or fixing point, between the two walls of the integral coupling element 12, 112, 212, keeping them stably connected together. In other words, the integral coupling element 12, 112, 212 has, formed thereon, a security fastening 37 made as one piece, or as a single body, with the plate-like portion 20 and configured to define a fastening point, fixing point or stop between the two walls of the integral coupling element 12, 112, 212.

[0108] More specifically, the security fastening 37 is defined by two wall portions of the integral coupling element 12, 122, 212 which are folded onto each other and protrude with respect to the plane P defined by the plate-like portion 20 on the same side as the coupling fin 21. Namely the coupling fin 21 and the security fastening 37 face each other.

[0109] More specifically, as shown in FIG. 1A, the security fastening 37 may be arranged along the coupling axis G, aligned with the locking fin 22 along a direction transverse, or perpendicular, to the coupling axis G. Preferably, the security fastening 37 is aligned with the locking fin 22 of the same plate-like portion 20 along a direction perpendicular to the coupling axis G.

[0110] Preferably, the integral coupling element 12, 112, 212 comprises a first reinforcing and guiding rib 39 and a second reinforcing and guiding rib 40 which are made as one piece with the plate-like portion 20.

[0111] The first rib 39 and the second rib 40 are configured both to provide the plate-like portion 20 with sufficient rigidity and to cooperate with another metal profile 10, 110, 210 in the coupling condition, keeping the plate-like portion 20, i.e. the integral coupling element 12, 112, 212, in a position aligned with the latter.

[0112] In other words, the plate-like portion 20 is provided with a first rib 39 and a second rib 40 configured both to provide the plate-like portion 30 with sufficient rigidity and to cooperate with another metal profile 10, 110, 210 in the coupling condition.

[0113] More specifically, the first rib 39 and the second rib 40 of a metal profile 10, 110, 210 are configured to cooperate with corresponding parts or portions of the slot of another metal profile 10, 110, 210.

[0114] Preferably, the first rib 39 comprises at least one stop section 41 which is transverse to the coupling axis G, or to the locking axis B, and which is designed to define an end-of-travel point or stopping point for the plate-like portion 20 on the other metal profile 10, 110, 210 and the second rib 40 extends parallel to the coupling axis G or to the locking axis B.

[0115] In other words, the first rib 39 comprises two straight sections 42, 43 which are offset with respect to each other and parallel to the coupling axis G and which are connected together by a stop section 41 which may be inclined with respect to the two straight sections 42, 43. The second rib 40 may comprise a single straight section parallel to the coupling axis G.

[0116] The stop section 42 has advantageously a stop function when the integral coupling element 12, 112, 212 is inserted in a slot 15 of another metal profile 10, 110, 210.

[0117] This results in the advantage of having a rigid plate-like portion and an integral coupling element 12, 112, 212 which are properly aligned when inserted inside a slot 15.

[0118] In this way, the metal profile 10, 110, 210 offers the advantage that it is easy to engage or couple together with another metal profile 10, 110210, without the installation worker having to perform complicated manoeuvres.

[0119] For example, with reference to the attached figures and considering the specific orientation of the overturned “T” section of the metal profile 10, 110, 210, the first rib 39 is arranged at the bottom, below the locking fin 22 and the recess 35, and closer to the arms of the overturned “T”; the second rib 40 is arranged at the top, above the security fastening 37 and the coupling fin 21, and further away from the arms of the overturned “T”.

[0120] Advantageously, the metal profile 10, 110, 210 and the integral coupling element 12, 112, 212 are made of the same material. Preferably, said material is a steel which has a combination of the following mechanical properties:

[0121] maximum tensile strength Rm greater than 500 N / mm2, and

[0122] elongation from 0% to 15%.

[0123] Preferably, the tensile strength Rm is between 650 and 850 N / mm2.

[0124] Preferably, the elongation varies from 1% to 12%, even more preferably from 2% to 8%.

[0125] The steel profiles 10,110, 210 therefore have a low elongation factor and high strength, and consequent high elastic return. The steel may be galvanized steel, stainless steel, or painted steel, or steel coated in a different way. In some embodiments, in the case of high-quality low-cost products, the steel is not lined.

[0126] In accordance with said properties, and as mentioned above, the steel may have a very small thickness of the order of 0.10 to 0.20 mm. Owing to the fact that the metal profile 10, 110, 210 has these high mechanical strength and low elongation properties, with consequent superior elastic properties, the fins 21, 22 may be easily and safely operated by a workman.

[0127] With reference to FIG. 3, below a slot 15 of a metal profile 10, 110, 210 will be described in detail.

[0128] The slot 15 is a through-slot and extends with a symmetrical shape along a direction of transverse extension DT, perpendicular to the direction of longitudinal extension DL. Preferably, the slot 15 comprises at least:

[0129] a coupling portion 51 having a respective first width L1 considered in the direction of longitudinal extension DL;

[0130] a guide portion, or first guide portion 52 having a respective second width L2 considered in the direction of longitudinal extension DL; and

[0131] an engagement portion 53 interposed between the coupling portion 51 and the first guide portion 51, along the direction of transverse extension DT and having a respective third width L3, also considered in the direction of longitudinal extension DL.

[0132] The coupling portion 51 is configured to allow the insertion of the coupling fins 21 of two integral coupling elements 12, 112, 212 of a pair of other metal profiles 10, 110, 210. In other words, each coupling fin 21 configured to be inserted inside a corresponding part of the coupling portion 51.

[0133] Preferably, each coupling fin 21 is designed to be inserted inside the coupling portion 51 adjacent to, or in contact with, corresponding protrusions 55, 57 of the first and third pairs.

[0134] For example, the coupling fin21 of the first metal profile 10, 110 and the coupling fin 21 of the second metal profile 110, 10 are configured to interfere with a corresponding part of coupling portion 51 of the slot 15 of the third metal profile 210.

[0135] Preferably, the coupling portion 51 is configured to allow the insertion, but not the release, of the coupling fins 21 of two integral coupling elements 12, 112, 212 of a pair of other metal profiles 10, 110, 210. In other words, the coupling portion 51 is designed to allow the insertion of one or two coupling fins 21, but does not allow the release thereof, thus engaging with them in a stable manner.

[0136] Preferably, in order to disengage the coupling fins 21 from the coupling portion 51 of the slot 15 it is sufficient to operate, or press, the said fins, deforming them elastically and temporarily in order to move them towards the corresponding plate-like portion 20 and consequently extract the corresponding integral coupling element 12, 112, 212.

[0137] The first guide portion 52 is configured to guide the insertion of opposite integral coupling elements 12, 112, 212 of a pair of other metal profiles 10,110, 210.

[0138] The coupling portion 51 is spaced in relation to, i.e. at a distance from, the first guide portion 52 along the direction of transverse extension DT. Namely, the coupling portion 51 and the first guide portion 52 are spaced from each other along the direction of transverse extension DT. In fact, the engagement portion 53 is present between the coupling portion 51 and the first guide portion 52.

[0139] Preferably, the third width L3 of the engagement portion 53 is less than the first width L1 of the coupling portion 51 and the second width L2 of the first guide portion 52 so as to define, inside the slot 15, a first pair of protrusions 55, between the engagement portion 53 and the coupling portion 51, and a second pair of protrusions 56, situated opposite the first pair of protrusions 55, between the engagement portion 55 and the first guide portion 52.

[0140] In other words, the coupling portion 51 has a first width L1 greater than the third width L3 of the engagement portion 53, thus forming a first pair of protrusions 55. Moreover, the first guide portion 52 has a second width L2 greater than the third width L3 of the engagement portion 53, thus forming a second pair of protrusions 56. The first pair of protrusions 55 and the second pair of protrusions 56 are situated opposite each other with respect to the engagement portion 53.

[0141] Moreover, preferably, the first width L1 is greater than the second width L2 of the first guide portion 52. Namely, the protrusions 55 of the first pair have a width greater than the protrusions 56 of the second pair, wherein the width is considered along the direction of longitudinal extension DL.

[0142] Preferably, the slot 15 also comprises a further guide portion, or second guide portion 54, having a respective fourth width L4 considered in the direction of longitudinal extension DL.

[0143] The second guide portion 54 is configured to guide the insertion of said at least one integral coupling element 12, 112, 212 inside the slot 15. Preferably, the second guide portion 54 is configured to guide the insertion of two opposite integral coupling elements 12, 112, 212 inside the slot 15.

[0144] As shown in FIG. 3, the coupling portion 51 is interposed between the second, or further, guide portion 54 and the engagement portion 53 along said direction of transverse extension DT.

[0145] Preferably, the fourth width L4 is less than the first width L1 so as to define a third pair of protrusions 57, between the second guide portion 54 and the first coupling portion 51. In other words, the coupling portion 51 has a first width L1 greater than the fourth width L4 of the second guide portion 54, thus defining, or forming, a third pair of protrusions 57 between the second guide portion 54 and the coupling portion 51.

[0146] The first guide portion 52 is configured to receive the first rib 39 and the second guide portion 54 is configured to receive the second rib 40. Preferably, the stop section 42 of the first rib 39 is designed to define an end-of-travel point, or stopping point, for the plate-like portion 20, making contact with the edges of the first guide portion 52.

[0147] Preferably, the second width L2 of the first guide portion 52 is equal to the fourth width L4 of the second, or further, guide portion 54. In other words, the first guide portion 52 and the second guide portion 54 have the same length L2, L4.

[0148] Moreover, the first guide portion 52 and the second, or further, guide portion 54 are positioned at the opposite ends of the slot 15, along said direction of transverse extension DT.

[0149] As shown in FIG. 3, considering the overturned “T” cross-section of the main portion 11, the first guide portion 52 is close to the arms of the overturned “T” and the second guide portion 54 is far from the arms of the overturned “T”. Moreover, starting from the arms of the overturned “T”, the slot 15 comprises in succession the first guide portion 52, the second pair of protrusions 56, the engagement portion 53, the first pair of protrusions 55, the coupling portion 51, the third pair of protrusions 57 and the second guide portion 54.

[0150] Preferably, the first pair of protrusions 55, the second pair of protrusions 56 and the third pair of protrusions 57 define inclined receiving surfaces for the insertion of the at least one integral coupling element 12, 112, 212. In other words, the protrusions 55, the protrusions 56 and the protrusions 57 are inclined with respect to the walls of the coupling portion 51 and the walls of the guide portion 52.

[0151] For example, the first pair of protrusions 55 and the third pair of protrusions 57 define inclined receiving surfaces for the insertion of the coupling fins 21. The second pair of protrusions 56 defines inclined receiving surfaces for the insertion of said first rib 39 and the third pair of protrusions define inclined receiving surfaces for the insertion of said second rib 40.

[0152] Preferably, the first guide portion 52 and the second guide portion 54 may have chamfered insertion corners situated opposite the respective protrusions 56, 57 and able to favour the insertion of the first rib 39 and the second rib 40, respectively.

[0153] The slot 15 therefore has inner linear edges without teeth or other engaging elements which make joining together of the metal profiles 10, 110, 210 difficult or slower. In this way, by combining the simple shape of the slot 15 with the arrangement of the coupling fin 21 and the locking fin 22, there is the advantage that assembly and disassembly of the support structure 100 is simple and rapid.

[0154] Considering by way of example FIGS. 4 and 5, the first and second metal profiles 10, 110 are stably associated with the third metal profile 210. In particular, the integral coupling elements 12, 112 of the pair of metal profiles defined by the first and second profiles 10, 110 are arranged opposite each other, namely on opposite sides, inside the slot 15 and coupled and stably locked thereto so as to define the support structure 100.

[0155] Preferably, the two metal profiles 10, 110 of said pair are moved closer together on opposite sides of the slot 15, namely of the main portion 11, and inserted gradually and in mirror-image fashion inside said slot so that the plate-like portions 20 slide on each other in mutual pressing contact until each of the plate-like portions 20 is partially received inside the slot 15 of the other profile 210.

[0156] In particular, preferably, in this coupling and locking condition, the coupling fins 21 of the pair of profiles 10, 110 are inserted and coupled inside the coupling portion 51 from opposite sides of the main portion 11 and in a mirror-image manner with respect to the direction of transverse extension DT. In the same way, the first ribs 39 and the second ribs 40 of the pair of metal profiles 10, 110 are inserted, respectively into the first guide portion 52 and into the second guide portion 54, from opposite sides of the main portion 11 and in mirror-image fashion with respect to the direction of transverse extension DT. Moreover, advantageously, in this coupling and locking condition, the locking fins 22 of the pair of profiles 10, 110 are inserted and locked inside the oppositely arranged counter-locking recesses 35.

[0157] It is pointed out that, in order to disassemble said support structure 100, it is sufficient to operate, i.e. press, each coupling fin 21, deforming it elastically temporarily, so as to cause it to pass from the first condition into the second condition, where it is moved closer to the corresponding plate-like portion 20 and, while maintaining temporarily this second condition, to extract the integral coupling elements 12, 112 from the slot 15. therefore disengaging the pair of metal profiles 10,110 from the third metal profile 210.

[0158] The subject-matter of the present disclosure has been described hitherto with reference to preferred embodiments thereof. It is to be understood that other embodiments relating to the same inventive idea may exist, all of these falling within the scope of protection of the claims which are attached below.

Claims

1. A metal profile for a suspended ceiling, comprising, in a double-wall configuration, a main portion and an integral coupling element connected as one piece to at least one end of said main portion, wherein said main portion and said integral coupling element define a direction of longitudinal extension of said metal profile, wherein said integral coupling element includes a plate-like portion which extends in the direction of longitudinal extension towards a free edge end, said plate-like portion defining a plane and at least one coupling fin and at least one locking fin made as one piece with said plate-like portion,wherein said coupling fin protrudes from the plane defined by said plate-like portion and said locking fin protrudes from the plane defined by said plate-like portion,wherein said coupling fin defines a coupling axis and is configured to interfere with another metal profile in a coupling condition,wherein said locking fin defines a locking axis and is configured to interfere with another integral coupling element of another metal profile in a locking condition, andwherein said coupling fin and said locking fin project from opposite sides of the plane defined by said plate-like portion and said coupling fin and said locking fin are offset with respect to each other, and wherein said coupling axis and said locking axis extend parallel along said direction of longitudinal extension of the respective metal profile, spaced from each other,and wherein said plate-like portion has a counter-locking recess arranged on said locking axis and able to receive a locking fin of another metal profile identical to said metal profile for a suspended ceiling so as to produce a locking condition, said counter-locking recess being arranged in a position closer to the free edge end of said plate-like portion than the locking fin.

2. The metal profile according to claim 1, wherein said locking fin is a deep-drawn part or deep-drawing formed in the plate-like portion and integrally fixed as one piece by means of respective connecting sides to said plate-like portion.

3. The metal profile according to claim 1, wherein said coupling fin and said locking fin are offset with respect to each other also along a direction transverse, or perpendicular, to said coupling axis or said locking axis.

4. The metal profile according to claim 1, wherein at least one of said coupling fin and said locking fin is displaceable by means of elastic deformation between a first position, where it is in a rest condition, protruding from said plate-like portion, and a second position, where it is in an elastically deformed condition, displaced towards said plate-like portion.

5. The metal profile according to claim 1, wherein said coupling fin has a respective hinged side connected to said plate-like portion and is detached, or separated, from said plate-like portion on remaining sides of said coupling fin.

6. The metal profile according to claim 1, wherein said recess is aligned with said coupling fin along a direction transverse, or perpendicular, to said locking axis.

7. The metal profile according to claim 1, further comprising a security fastening made as one piece with said plate-like portion and configured to define a fastening point, or attachment point, for the two walls of said integral coupling member, keeping them stably connected together.

8. The metal profile according to claim 7, wherein said security fastening protrudes with respect to the plane defined by said plate-like portion on the same side as said coupling fin and is arranged along said coupling axis, aligned with said locking fin along a direction transverse, or perpendicular, to said coupling axis.

9. The metal profile according to claim 1, further comprising a first reinforcing and guiding rib and a second reinforcing and guiding rib, which are made as one piece with said plate-like portion and configured both to confer sufficient stiffness thereto and to cooperate with another metal profile in the coupling condition, keeping said plate-like portion in a position aligned with the other metal profile.

10. The metal profile according to claim 1, wherein said integral coupling element is made of the same steel as said metal profile, which has a combination of the following mechanical properties:a maximum tensile strength Rm greater than 500 N / mm2, preferably 650 to 850 N / mm2; andan elongation of 0% to 15%, preferably 1% to 12%, even more preferably 2% to 8%.

11. The metal profile according to claim 1, wherein it has a thickness in the range of 0.10 to 0.20 mm.

12. A support structure for a suspended ceiling, comprising at least one pair of metal profiles aligned with each other, wherein each metal profile is according to claim 1, and a third metal profile associated at right angles with said pair of metal profiles, wherein at least said third metal profile includes a slot for accommodating the integral coupling elements of the metal profiles of said pair, thereby providing a cross-like configuration, wherein the metal profiles of said pair are arranged opposite each other and coupled to opposite sides of said third metal profile by means of cooperation of the respective coupling fins with respective edges of said slot, and wherein the metal profiles are stably locked together by means of cooperation of the locking fin of one metal profile of the pair of metal profiles with the locking recess of the other metal profile of the pair of metal profiles.

13. The support structure according to claim 12, wherein the metal profiles of said pair and said third profile are identical to each other.

14. The support structure according to claim 12, wherein said slot extends with a symmetrical shape along a direction of transverse extension, perpendicular to said direction of longitudinal extension, and comprises:a coupling portion having a respective first width in the direction of longitudinal extension and configured to allow insertion of the coupling fins of the two integral coupling elements of the pair of metal profiles,a guide portion having a respective second width in the direction of longitudinal extension and configured to guide the insertion of said oppositely arranged integral coupling elements of the pair of metal profiles, wherein said coupling portion is spaced in relation to, i.e. at a distance from, said guide portion along the transverse direction of extension,a engagement portion interposed between said coupling portion and said guide portion along said direction of transverse extension, and having a respective third width less than said first width and said second width so as to define, in said slot, a first pair of protrusions, between said engagement portion and said coupling portion, and a second pair of protrusions, opposite to said first pair of protrusions, between said engagement portion and said guide portion.

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