Lightweight building board, and use of the lightweight building board

Abstract

The invention relates to a lightweight building board (1) comprising two outer metal sheets (2) and a core (3), wherein the core (3) is positioned between the metal sheets (2) and has a plurality of webs made of metal, and the webs create a force-transmitting connection between the two metal sheets (2). The webs are designed as intersecting longitudinal and transverse webs (30, 31) and are inserted into one another in such a way that the longitudinal and / or transverse webs (30, 31) have extension openings (33) through each of which a longitudinal or transverse web (30, 31) extends at least in sections. The invention also relates to a use of the lightweight building board (1).

Description

[0001] Lightweight panel, and use of the lightweight panel

[0002] Description:

[0003] The invention relates to a lightweight metal panel according to the features in the preamble of claim 1.

[0004] Lightweight panels are well known in practice, especially those made from wood or wood-based materials. On the one hand, wood-based panels face the problem of increasingly limited resource availability. On the other hand, wood and wood-based materials are susceptible to moisture and / or humidity, which can reduce both the durability of the products, namely their resistance to biological degradation, and their elastomechanical strength.

[0005] Lightweight plastic panels have a low modulus of elasticity and are flammable. The production of plastics is often environmentally harmful. Furthermore, the necessary raw materials are not always readily available, resulting in rising procurement costs.

[0006] Furthermore, panels are known that consist primarily of metal. Simple (single-layer) sheet metal panels have the advantage of having a completely closed surface. The problem is that a sheet's high load-bearing capacity is associated with a high material input, which is particularly disadvantageous from an economic perspective.

[0007] The present invention is based on the object of proposing a plate which is versatile in particular with a low dead weight, has a permanently high load-bearing capacity depending on the requirements and is durable against external influences.

[0008] Stresses. The board should also be easy to manufacture.

[0009] This object is achieved by a lightweight construction panel according to the features of claim 1. Features of the invention are described below. These design features can be implemented in conjunction with the invention or can be independently inventive, independent of the invention, and they can be implemented either individually and independently of one another or in any combination, including the implementation of all of the aforementioned features, unless a combination is expressly or technically mandatory.

[0010] In other words, the invention proposes a flat and load-bearing lightweight panel, which essentially comprises metallic materials, in particular steel, stainless steel, and / or aluminum. A core with webs forming a supporting structure is arranged between two outer metal panels. According to the proposal, one or more webs create a force-transmitting connection between the metal panels, i.e., a positive, non-positive, and / or material-locking connection, preferably by means of welded or adhesive joints. Adhesive bonding is advantageous because, in principle, no significant, thermally induced distortion of the panel elements is induced.A structure comprising two metal panels connected by webs is particularly advantageous because the geometrically optimized design, essentially similar to a double-T structure, enables high load-bearing capacity while using comparatively small amounts of material. The proposed design creates a resilient overall structure that, in accordance with DIN EN ISO 14122, can withstand a walkability of at least 1.5 kN (load cube of 200 x 200 m). 2 ) or according to DIN 1072 a trafficability of SLW60 at least 100 kN (load cube 200 x 600 mm 2 ) or FL6 at least 85 kN (load cube 200 x 200 mm 2 ) according to EN 1991. Initial tests have shown that a plate thickness between 10 and 120 mm, preferably between 20 and 100 mm, is particularly advantageous.

[0011] In the simplest case, individual sheet metal strips, (round) bars or the like can form the webs, which extend horizontally between the metal plates, preferably in such a way that the narrow edges of the sheets or the lateral surface of the (round) bars each rest against the metal plates and the metal plates are arranged substantially parallel to one another.

[0012] The invention is based on the idea of ​​proposing a lightweight panel whose construction can be freely dimensioned depending on the application-dependent loading and load cases, namely by adapting the load-bearing elements metal plate and web as well as by designing a force-transmitting connection between these elements.

[0013] What is essential to the invention is that the longitudinal webs, on the one hand, and the transverse webs, on the other hand, are aligned so as to cross one another and penetrate one another at least in sections. For this purpose, the longitudinal and / or transverse webs have extension openings through which a longitudinal or transverse web each extends, at least in sections. Preferably, both the longitudinal web and the transverse web each have at least one extension opening, and in a particularly advantageous embodiment, the longitudinal and transverse webs are inserted into one another in the region of these two openings. This means that, particularly preferably, neither the first web having the respective extension opening nor the penetrating second web is interrupted at the intersection point over the entire web cross-section. Instead, the webs are inserted into one another as proposed, or the webs are advantageously hooked together.Particularly preferably, all webs are uninterrupted at least in sections at the respective intersection points, so that at least one web in each case has an extension opening through which another web extends. Initial tests have shown that this creates, for example, a particularly rigid construction. In certain applications, however, one or more extension openings can also cover the entire cross-section of one web or several webs, so that they are interrupted and second webs are passed through.

[0014] In this context, the term "web" is used interchangeably for the terms "longitudinal web" and "transverse web" unless explicitly referenced. From a functional perspective, a longitudinal web refers to a web that, particularly in conjunction with the other longitudinal webs, makes a significant contribution to the strength of the lightweight panel. In particular, a longitudinal web is always connected to at least one of the two metal panels. The function of the transverse webs can also extend beyond simply stiffening the core structure, especially if the transverse web in question is also connected to at least one metal panel in a force-transmitting manner.

[0015] The core-related spacing of the metal panels from one another essentially defines the thickness of the panel, plus the material thickness of the metal panels. The outer sides of the core can be open (in sections) or closed (in sections) and are referred to herein as the (circumferential) panel edge. The thickness of the lightweight panel can thus be easily adapted, essentially depending on requirements via the dimensioning and design of the webs. An inventive further development is based on the idea of ​​replacing one of the two outer metal panels with one or more panel sections in the form of one or more beams, for example in the form of individual metal pins and / or metal strips, which can be positioned and connected with webs as required. With such a design, individual or all of the features described here can be implemented in any combination.

[0016] In one embodiment, the extension openings can have a contour which substantially corresponds to the contour of the penetrating web, or of the web section extending through the extension openings, wherein in the case of a partial overlap, one of the two webs can protrude beyond the narrow edge of the other web or both webs each protrude beyond the narrow edges of the respective other web.

[0017] In particular, the design of the respective contours can promote a type of press fit, whereby with increasing overlap, i.e., the contour of the extension opening is smaller than the corresponding contour of the extending web, higher press-in forces may be required to insert the webs into one another. Alternatively, the contour of the extension openings can be designed larger to simplify insertion.

[0018] In a preferred further development, the extension opening can be configured as an open edge slot. The edge slot refers to an extension opening that originates in a longitudinal or narrow edge of a web and extends from this first edge essentially in the direction of the opposite second narrow edge, but preferably without reaching this opposite edge in order to prevent a complete interruption of the web.

[0019] Additionally, the edge slot can be designed to be essentially V-shaped, meaning that the width of the slot is wider in the edge area than in the slot base. This is advantageous for easier insertion of the penetrating web.

[0020] Longitudinal and transverse webs can each run at an angle to each other until they meet at the intersection point. Preferably, one or more longitudinal webs are aligned substantially at right angles to transverse webs, particularly preferably all longitudinal webs to all transverse webs, for example in the manner of a grating or the like. This regular structure can impart particularly high mechanical strength to the lightweight panel. At least in sections, i.e., at least in one section or in one area of ​​the panel, the longitudinal and transverse webs can also be aligned irregularly, at acute and / or obtuse angles to each other, for example to form a honeycomb-like core structure or the like.

[0021] The core structure of intersecting webs and outer metal panels creates an inner core space composed of multiple spaces, wherein the spaces are generally connected to one another in a manner that prevents fluid flow, particularly when the peripheral edge is covered or closed by another component. According to the invention, the webs have extension openings to enable them to be inserted into one another; however, the extension openings do not have to be designed in such a way that, in addition to a web section extending therethrough, further regions of the extension openings are available for fluid exchange between two spaces. In this case, in particular, further openings in the form of one or more connecting openings can be provided in the webs to create a fluid-flow-through connection between two adjacent spaces.If extension openings remain available for fluid exchange at least in some areas even after the web has been penetrated, these areas are referred to here as connecting openings in the sense of a functional definition. For example, the aforementioned connecting opening structures in a web can be designed on the edge side in the manner of a toothing, which can be easily produced by punching, drilling, milling or similar. Extension openings and / or connecting openings can have round, oval or polygonal contours. Furthermore, the openings within a plate can be essentially identical or differ from one another in shape and size. By connecting the spaces, it can be ensured, among other things, that (excess) gases or liquids, which originate, for example, in galvanizing processes or the like, can be discharged from the space between the plates as needed.Likewise, water or similar substances that have accidentally penetrated the core can be removed. Furthermore, the openings result in material savings, allowing the weight of the proposed lightweight panel and its costs to be further reduced.

[0022] The lightweight panel can be open at the edges, so that, for example, the core space is at least partially accessible from the outside. In an advantageous embodiment, the core can have a preferably metallic edge web, so that the core space is at least partially closed. In the present case, a component is referred to as an edge web which is arranged adjacent to and substantially parallel to the edge of a metal sheet, so that the edge web, in turn, forms a closed panel edge at least in the area of ​​the edge web. If all panel sides have an edge web, this can create a circumferential panel edge.

[0023] The edge web can completely or partially close a panel edge. Connection openings can be provided in the edge web for a partial closure. Alternatively or additionally, the edge web can be designed narrower than the panel thickness for a partial closure, so that an open gap is formed between a metal panel and a longitudinal edge of the edge web, for example, in the form of a connection opening.

[0024] In one embodiment, several or all of the longitudinal webs and / or transverse webs can each be connected to both metal panels, preferably directly and with a material bond. Furthermore, it can be provided that at least one longitudinal web and / or one transverse web is connected to only one metal panel, in that this web is preferably smaller than the other webs, i.e., that it does not substantially correspond to the panel thickness. In this way, for example, connecting openings can be dispensed with, which might be necessary in order to connect two intermediate spaces separated by a transverse web in a way that allows fluid to flow through them. Material savings can also result in cost advantages from an economic perspective.Furthermore, it can be provided that the longitudinal webs are connected directly to the first metal plate and the transverse webs are connected to the second metal plate, so that the force-transmitting connection is essentially completed by the connection between the longitudinal and transverse webs.

[0025] The lightweight panel described here proposes a component with high elasto-mechanical strength. A further development of the invention is based on the idea of ​​being able to increase shear strength, in particular. For this purpose, at least one metal panel can have recesses, for example, slot-like recesses that extend through the metal panel.

[0026] Advantageously, the core structure, in particular one or more webs, has at least one projection or elevation on the longitudinal or narrow edge side, which engages with a recess. In the region of the recess, the metal sheet can advantageously be connected to the projection and thus to the core structure, in particular by means of a material bond, for example by means of a welded connection or adhesive bond. Particularly advantageously, the height of the projection, in the manner of a web widening, corresponds at most to the thickness of the metal sheet, so that the projection does not protrude from the recess or from the surface of the metal sheet. As a result, a largely smooth surface can be created.

[0027] In an alternative embodiment, the recesses can be designed differently, in the form of a trough, pocket, or the like, so that they do not extend from one surface of a metal sheet to the other in a passable manner, but rather provide a cavity in a metal sheet into which a projection, as described above, can engage. Preferably, the contour of a recess essentially corresponds to the contour of a projection, in particular to enable the formation of a highly resilient positive and / or non-positive connection.

[0028] In particular, as an alternative to the aforementioned recesses, it can be provided to firmly bond the metal plate and core structure using resistance welding processes. In a particularly inventive further development, at least one metal plate can have an anti-slip surface on the side facing away from the core. For this purpose, the surface can, for example, have an anti-slip coating in the form of a paint, a film, or the like.

[0029] Plastics can advantageously be used as coating systems, for example, those based on polyurea or polyurethane or similar. These coating systems can generally serve one or more purposes. Firstly, they can achieve a preferably uniform, anti-slip effect, for example, to meet the requirements of a slip resistance class between R9 and R13. Secondly, the proposed coating systems can enable color accents or color marking of specific areas of the surface, for example, to indicate potential hazards in an industrial environment without having to accept reduced performance of the coating. Thirdly, a low-injury surface can be created that may be suitable for use in barefoot areas.Fourth, the proposed coating measures can create a chemically resistant surface that is, for example, resistant to oils, greases, fuels, road salt, or similar substances with a fundamentally corrosive effect. Corrosion resistance can be advantageously achieved, for example, through a combination of hot-dip galvanizing or Sendzimir galvanizing and a coating system.

[0030] Alternatively or additionally, a metal sheet can be provided with an anti-slip profile on the surface facing away from the core, for example, in the form of a teardrop plate, corrugated plate, or the like. Such surface structures are advantageously applied using a press-rolling process or the like. Furthermore, it can be provided that both metal sheets each have a coating and / or a profile on the surface facing away from the core.

[0031] In one embodiment, the longitudinal webs can be aligned substantially parallel to one another, at least in sections. Likewise, it can alternatively or additionally be provided that the longitudinal webs run largely parallel to the edge of the panel. Furthermore, it can alternatively or additionally be provided that one or more longitudinal webs extend in a wave-like manner in one plane and / or in one plane obliquely to the edge of the panel. By aligning the longitudinal webs of the core structure, individual adaptation to different loading cases can be achieved, whereby the alignment of the longitudinal webs can also vary within a panel in order to be able to take into account a high spatial resolution for defined, possibly particularly high load cases in certain points or regions.

[0032] Particularly due to application-specific loading situations, it may be provided that a corresponding number of longitudinal and / or transverse webs are implemented in a core structure of the proposed lightweight panel. In this sense, it may also be provided, alternatively or additionally, that the webs and / or the metal panels are adapted, for example, in cross-section, depending on the requirements. In particular, the described design features of the webs can each constitute an independent inventive added value.

[0033] Alternatively or additionally, the transverse webs can be oriented in a manner that differs from the orientation of the longitudinal webs, for example, by orienting them approximately diagonally in the plane of the core structure, i.e., unequally parallel to a panel edge, or by orienting them in a wave-like manner. Furthermore, the previous description regarding the orientation of the longitudinal webs is applicable to the orientation of one or more transverse bars.

[0034] The crossbars can be arranged in a regular pattern that extends across the entire core structure. Alternatively, for the purpose of local reinforcement, crossbars can be inserted into the core structure only in certain areas, allowing for a locally increased load-bearing capacity depending on the application. The arrangement of the crossbars can, in particular, influence the shear strength of the lightweight panel depending on the requirements.

[0035] Furthermore, it can be provided that the spacing of the webs within a core structure is regular and / or at least partially different from one another, with a first spacing between a first and a second web being greater than a second spacing between the second and a third web. In particular, by irregularly spacing the load-bearing cross-sections, namely preferably the cross-sections of the longitudinal, transverse, and / or edge webs, lightweight panels can be created which, for example, can withstand high loads at specific points or in certain areas and yet are lightweight, since the supporting structure is reinforced accordingly only in the required areas.

[0036] Due to its design, the lightweight panel may have a core space, with one or more intermediate spaces or hollow chambers forming the core space. The core space can function as an installation level for electrical or plumbing lines or equipment, or similar. Furthermore, the core space can alternatively or additionally be provided as an insulation level for energy- and / or acoustically effective insulation. Filling material, such as insulating materials or similar materials, can be introduced into the core space for this purpose, thus filling it at least partially. Further measures can be taken to make the core space usable for fire protection.

[0037] The webs can be designed as simple sheet metal strips. In a further development, these webs, in particular, can be designed as profile elements, preferably as I-, Z-, T-, and / or C-profiles. Such profile cross-sections can be easily roll-formed or folded, whereby the corner areas of the angle profiles can advantageously be rounded. Furthermore, the profiles are advantageous for manufacturing because they can be positioned relatively stably, even before they are fixed by welding or gluing. Likewise, forces can be transmitted with relatively low stress peaks in load situations.

[0038] A profiled sheet can support a particularly advantageous design of a lightweight panel, creating a highly resilient structure. Furthermore, profiles can be created, particularly for the edge webs, to function as a drip edge, for example, to enable controlled liquid removal from the surface of the metal panels.

[0039] In the interest of largely unlimited dimensioning, several, preferably similar, profiles arranged side by side in a plane can be provided in this case to form a larger, composite lightweight panel. Alternatively, different profile variants can be implemented in one advantageous lightweight panel.

[0040] Metallic materials are advantageous for this proposal because, with appropriate reinforcement measures, they are highly resistant to external stresses, such as biological degradation or exposure to ultraviolet radiation, over the long term. Furthermore, the choice of metallic materials can directly influence, among other things, the load-bearing capacity of the slab.

[0041] In general, metallic materials are also characterized by a high diffusion resistance, such that these materials represent a largely insurmountable physical barrier to gases, liquids, and solids. Consequently, at least one metal panel can be provided without recesses or the like, thus creating a lightweight panel that can ensure a closed surface even under the most extreme chemical and / or physical stresses.

[0042] A key factor influencing load-bearing capacity in particular can be the design of the connection between the webs and / or between the metal panel and the webs. For example, the type and nature of the welding or bonding can directly influence the force transmission between the elements of the proposed lightweight panel. In this case, it can be particularly important, for example, to maintain a certain deformation tolerance, for example by not welding the entire panel. Particularly in dynamic loading situations, it can be advantageous to be able to at least partially convert the energy introduced into the lightweight panel into deformation and / or thermal energy by absorbing or dissipating it.

[0043] It has been shown that, surprisingly, despite the very slim and therefore lightweight construction, a plate with a high load-bearing capacity can be realized using metallic materials. In particular, this allows material to be saved, which minimizes costs and weight. Initial tests have shown that high-performance steels such as S550, S600 or S720 are particularly advantageous. In principle, non-rusting metals (stainless steels, aluminum) are advantageous. Furthermore, the tests have shown that the material thickness of the metal panels is preferably between 1 and 5 mm, particularly preferably 1 to 3 mm, and the material thickness of the longitudinal, transverse and / or edge webs is 0.5 to 5 mm, particularly preferably 1 to 3 mm.

[0044] Furthermore, the invention relates to the use of the proposed lightweight sheet, which can be equipped with different combinations of features according to the previous description.

[0045] According to the invention, the proposed lightweight panel can be used, in particular, as a structurally effective floor, wall, and / or roof element of a building and / or vehicle. A structurally effective element is considered to be a component that is self-supporting and, moreover, functions as a structurally essential component within the overall structure, so that failure could have serious consequences for people and the environment.

[0046] In buildings, applications in particular can be envisaged in the industrial or commercial sector. Depending on the requirements, for example, a floor covering can be created that is at least largely closed and, with an appropriate coating, is particularly slip-resistant and, at the same time, resistant to external influences such as chemicals or the like. Furthermore, a floor covering with a high load-bearing capacity can be created, whereby the intended lightweight panel can be dimensioned for various load and stress cases by adapting the load-bearing elements and their connection to one another (positive, non-positive, and / or material connection and the extent of these).

[0047] Because the metal materials used are very durable, they are particularly suitable for use in wet areas such as bathrooms, washrooms, or similar, which is always a very problematic application with the lightweight panels known in practice. For example, to effectively drain away liquids in wet areas, inlet openings can be provided in the upper metal panel through which a liquid can initially reach the core space. In contrast, the lower metal panel is essentially designed to be liquid-tight. Because these two metal panels are no longer parallel, but rather the lower metal panel in particular has an incline, the liquid in the core space can be drained away in a directional manner.

[0048] Through the use of the proposed metallic materials, optionally in combination with a coating, the proposed lightweight panel is particularly well-suited to meeting the stringent hygiene requirements in food processing. Use as a floor element can be particularly intended for traffic areas, for example, steps in a stairwell (or as a railing element), as a roadway in a parking garage (or as a crash barrier within the same), as a platform in a train station / railway station, or similar. In these cases, too, a metal panel open at the top may be advantageous, particularly to drain precipitation in the form of rain, hail, or snow, thus preventing slippery conditions or similar conditions.

[0049] The proposed lightweight panel can particularly preferably be used in vehicles or in vehicle construction, in particular for forming a floor element (in a trailer) of a truck, a rail vehicle, as a component of the chassis or vehicle frame, or similar. In this application, in addition to the advantages already described, the lightweight panel can also represent a structurally effective element of the vehicle, for example as a vehicle floor, which counteracts the pronounced deformation forces, particularly shear forces, when cornering, for example, whereby a correspondingly suitable lightweight panel has a comparatively low weight. In particular, the weight advantages are surprising for a proposed lightweight panel made of metal with correspondingly high load-bearing capacity and are of particular importance for the mobile sector.

[0050] In addition, a coating that meets the requirements can increase the slip resistance of a vehicle floor, eliminating the need for additional anti-slip measures in the cargo area, such as anti-slip mats. Firstly, this can significantly simplify and accelerate the loading process. Secondly, practice has shown that mobile anti-slip measures are subject to high levels of wear or are often missing altogether, resulting in inadequate load securing. The proposed lightweight panel offers a solution to this.

[0051] An embodiment of the invention is explained in more detail below with reference to the purely schematic representations, whereby individual features or a combination of features of the illustrated embodiment can also be implemented independently of the remaining design of the embodiment in a proposed lightweight panel.

[0052] Fig. 1 is a perspective view obliquely from below of a first embodiment,

[0053] Fig. 2 is a side view of a second embodiment,

[0054] Fig. 3 is a perspective, partial view obliquely from above of a third embodiment, and

[0055] Fig. 4 is a side view of a fourth embodiment.

[0056] Fig. 1 shows a first embodiment of a lightweight panel 1 in a perspective view obliquely from below. For reasons of illustration, the lower, outer metal panel 2 is not shown, so that Fig. 1 allows a view of the core 3 or into the core space 35. Several metallic webs can be seen, which are arranged between two metal panels 2. All webs are designed as C-profiles. Several longitudinal webs 30 extend parallel to one another and are arranged essentially equidistant from one another, with three longitudinal webs 30 each opening in the same direction. In addition, the lightweight panel 1 has transverse and edge webs 31, 32. The webs are glued to the outer metal panels 2 via the upper and lower profile legs in a force-transmitting manner, forming an overall construction with extremely high static load-bearing capacity.The edge webs 32 run parallel to the longitudinal webs 30 and to the edge 20 of the metal panel 2.

[0057] On the side facing away from the core 3, the upper, outer metal panel 2 has an anti-slip surface 22, namely in the form of a plastic coating, which is not visible in the present case for illustration reasons.

[0058] A plurality of transverse webs 31 extend substantially at right angles to the longitudinal webs 30, wherein the longitudinal webs 30 and the transverse webs 31 have a plurality of extension openings 33 and the longitudinal and transverse webs 30, 31 are each inserted into one another in the region of two extension openings 33. In this way, on the one hand, the longitudinal webs 30 extend in sections through the extension openings 33 of the transverse webs 31 and, on the other hand, the transverse webs 31 extend in sections through the extension openings 33 of the longitudinal webs 30. In contrast to the illustrated embodiment, only the longitudinal webs 30 or only the transverse webs 31 can each have the extension openings 33 through which the respective other webs extend. By interlocking the longitudinal or transverse webs 30, 31 in this way, a particularly shear-resistant geometry is achieved.In the exemplary embodiment, the extension openings 33 are designed such that the respective webs engage tightly, so that a press fit sometimes occurs and the webs can only be separated again with increased force, if at all. Additionally, the webs can be glued and / or welded to one another, regardless of the design of the exemplary embodiment shown. The height of the core in Fig. 1, and thus the plate thickness P, indicated in Fig. 1 by a double arrow, is essentially defined by the height of the longitudinal, transverse, and edge webs 30-32.

[0059] Longitudinal, transverse, and edge webs 30-32 have a plurality of connecting openings 34, which make the core space 35 permeable to fluids or the like. Furthermore, the connecting openings 34 allow the core space 35 to be filled with a filling material without creating significant voids that cannot be filled.

[0060] A side view of a second exemplary embodiment is shown in Fig. 2. The lightweight panel 1 shown essentially has a double-T basic structure with a panel thickness P (double arrow). The panel thickness P is defined by the height of the longitudinal webs 30, which abut a metal panel 2 on the narrow or longitudinal edge side and are integrally connected to it. In contrast, the transverse webs 31 and the edge webs 32 are smaller, so that, for example, the transverse webs extend through the extension openings 33, particularly in the upper third of the longitudinal webs 30. Furthermore, connection openings can be seen in the edge of the transverse webs 31 facing the upper, outer metal panel 2.

[0061] Fig. 3 shows a perspective detail view obliquely from above of a third embodiment of a lightweight panel 1, wherein the upper metal panel 2 is shown transparent to allow a view of the structures of the core 3. Longitudinal webs 30 running parallel to one another extend in the core plane between two metal panels 2. The longitudinal webs 30 each have a projection 300, which engages in a recess 21 in the upper metal panel 2. In this way, a particularly shear-resistant component is created. For reasons of clarity, the transverse webs 31 are not shown in Figs. 3 and 4.

[0062] Fig. 4 shows a side view of a fourth embodiment of a lightweight panel 1 with a perforated lower metal panel 2, wherein the material thickness M of the upper, outer metal panel 2 differs from that of the lower, outer metal panel 2. Indicated in Fig. 4 are several longitudinal webs 30, although not every longitudinal web 30 adjoins the lower metal panel 2 along its longitudinal or narrow edge. By selecting the material thickness M, the panel thickness P, and the type of metal, the mechanical properties of the lightweight panel 1 can be influenced and matched to one another depending on requirements.

[0063] Reference symbol:

[0064] 1 lightweight panel

[0065] 2 metal plates

[0066] 3 core

[0067] 20 edge

[0068] 21 Recess

[0069] 22 Anti-slip surface

[0070] 30 Longitudinal web

[0071] 31 Crossbar

[0072] 32 edge web

[0073] 33 extension openings

[0074] 34 Connection opening

[0075] 35 Core room

[0076] 300 lead

[0077] M material thickness

[0078] P Plate thickness

Claims

Claims:

1. Lightweight panel (1), with two outer metal panels (2), and with a core (3), wherein the core (3) is arranged between the metal panels (2) and has a plurality of webs made of metal, wherein the webs create a force-transmitting connection between the two metal panels (2), characterized in that the webs are designed as intersecting longitudinal and transverse webs (30, 31) and are inserted into one another in such a way that the longitudinal and / or transverse webs (30, 31) have extension openings (33) through which a respective longitudinal or transverse web (30, 31) extends at least in sections.

2. Lightweight panel (1) according to claim 1, characterized in that the contour of an extension opening (33) substantially corresponds to the contour of a longitudinal or transverse web (30, 31).

3. Lightweight panel (1) according to claim 1 or 2, characterized in that at least one extension opening (33) is designed as an open edge slot.

4. Lightweight panel (1) according to one of the preceding claims, characterized in that one or more longitudinal webs (30) extend substantially at right angles to one or more transverse webs (31). Lightweight panel (1 ) according to one of the preceding Claims, characterized in that a longitudinal and / or a transverse web (30, 31) has at least one connection opening (34). Lightweight building panel (1) according to one of the preceding claims, characterized in that the core (3) has a metallic edge web (32) which is arranged adjacent to and substantially parallel to the edge (20) of a metal panel (2). Lightweight building panel (1) according to one of the preceding claims, characterized in that longitudinal webs (30) are each connected to both metal panels (2) and at least one transverse web (31) is connected to one or the other metal panel (2). Lightweight building panel (1) according to one of the preceding claims, characterized in that a metal panel (2) has at least one recess (21), and that a longitudinal and / or a transverse web (30, 31) has one or more projections (300), wherein a projection (300) is in engagement with a respective recess (21).Lightweight panel (1) according to one of the preceding claims, characterized in that a metal panel (2) has an anti-slip surface (22) on the side facing away from the core, in such a way that. the metal panel (2) is coated and / or has a profiling. Lightweight building panel (1) according to one of the preceding claims, characterized in that longitudinal webs (30) are aligned substantially parallel to one another at least in sections, wherein a first distance between a first and a second longitudinal web (30) is greater than a second distance between the second and a third longitudinal web (30), and / or that transverse webs (31) are aligned substantially parallel to one another at least in sections, wherein a first distance between a first and a second transverse web (31) is greater than a second distance between the second and a third transverse web (31).Lightweight building panel (1) according to one of the preceding claims, characterized in that the core (3) has a core space (35), wherein the core space (35) is filled with a filler material in such a way that the filler material surrounds the longitudinal and / or transverse webs (30, 31) at least in sections. Lightweight building panel (1) according to one of the preceding claims, characterized in that the longitudinal and / or transverse webs (30, 31) are designed as I-, Z-, T- and / or C-profiles. Lightweight building panel (1) according to one of the preceding claims, characterized in that the metal sheets (2) have a material thickness (M) of 1 to 5 mm. and that the longitudinal and / or transverse webs (30, 31) have a material thickness (M) of 0.5 to 5 mm. Lightweight construction panel (1) according to one of the preceding claims, characterized in that the panel thickness (P) is between 20 and 100 mm. Use of a lightweight construction panel (1) as a structurally effective floor, wall and / or Roof element of a building and / or a vehicle, wherein the lightweight panel (1) is designed according to one of the preceding claims.

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