Cleanroom flooring system

Abstract

Cleanroom floor system (1) with a framework (12) and with a plurality of raised floor panels (10) placed on the framework (12), wherein the raised floor panels (10) each have a rectangular base area, wherein the framework (12) comprises a plurality of vertical uprights (14) arranged at the intersections of a rectangular grid (13), such that each raised floor panel (10) is supported at each of its four corners by a vertical upright (14), and wherein at least one of the raised floor panels (10) is designed as a heavy-duty raised floor panel (20) which has a stand-free section (22) oriented along one of its edges, extending over at least 100 cm.

Description

[0001] The present invention relates to a cleanroom floor system with a framework and with a plurality of raised floor panels placed on the framework.

[0002] A cleanroom floor is typically a raised floor construction with an extensive cavity between a walkable floor and the underlying subfloor. The floor is formed by rectangular raised floor panels with a typical edge length of no more than 60 cm, which rest on a support structure. This support structure consists of columns, on which each raised floor panel is supported at each of its four corners. Adapted to the design of the raised floor panels, the columns are arranged in a predetermined pattern at the intersections of a rectangular grid within the cavity, spaced no more than 60 cm apart. In a cleanroom floor, utility lines and supply lines for the cleanroom can be installed within this cavity, taking into account the predetermined column arrangement when routing such lines.This restricts flexibility in the installation of utility lines, as well as in the handling of heavy components that exceed the load-bearing capacity of the raised floor and require support on the subfloor. Furthermore, the accessibility of installed utility lines is limited by the predetermined column arrangement, making maintenance of existing utility lines regularly a costly and time-consuming process. While it may be possible in individual cases to construct a bridge with a load-bearing profile spanning a omitted column and positioned beneath the raised floor panels, implementing such a bridge is complex and further reduces the available floor space.

[0003] One object of the present invention is therefore to provide an improved cleanroom flooring system in light of the aforementioned problems, which in particular achieves increased flexibility in the laying of media routes or the transport of heavy components.

[0004] The solution according to the invention lies in the features of the independent claims. Advantageous further developments are the subject of the dependent claims.

[0005] According to the invention, a cleanroom floor system with a framework and with a plurality of raised floor panels placed on the framework is disclosed, wherein the raised floor panels each have a rectangular base area, wherein the framework comprises a plurality of vertical supports arranged at the intersections of a rectangular grid, such that each raised floor panel is supported at each of its four corners by a vertical support, and wherein at least one of the raised floor panels is designed as a heavy-duty raised floor panel which has a support-free section oriented along one of its edges, extending over at least 100 cm.

[0006] The invention relates to an advantageous embodiment of a cleanroom flooring system in which at least one raised floor panel is designed as a heavy-duty raised floor panel. By providing this heavy-duty raised floor panel with a column-free section along its edge, extending over at least 100 cm, a larger area in the cavity beneath the heavy-duty raised floor panel can be designed without vertical columns that could otherwise obstruct the installation of utility lines or the placement of heavy components supported on the subfloor. This increases flexibility in the installation of utility lines and the placement of heavy components in this area of ​​the cavity.Furthermore, the proposed design offers less restricted freedom of movement within the cavity, thereby improving access to the utility lines installed there and reducing the effort associated with their maintenance. The need for costly bridge structures and the associated restriction of the cavity height can be avoided. Additionally, the total number of vertical supports required for a given area can be reduced.

[0007] Raised floor panels can have a square base area. Several or even all of the raised floor panels can be designed as heavy-duty raised floor panels.

[0008] The vertical supports can each be designed to support up to two, three, or four raised floor panels, for which purpose each vertical support can include a suitable support plate for the raised floor panels. The vertical supports can each be individually height-adjustable. The vertical supports can, for example, each be designed to prevent or at least limit horizontal movement of one or more raised floor panels in one, two, three, or four directions. For this purpose, the vertical supports can each have suitable locking elements, such as corresponding grooves or tongues, which can be arranged, for example, on their respective support plate and which can interact with corresponding locking elements on the side of the raised floor panels.

[0009] A column-free section is understood to be a section of a raised floor slab where support for the slab by a vertical column is neither present nor required. Accordingly, a raised floor slab must be designed and, in particular, provided with sufficient load-bearing capacity to bridge a designated column-free section, and must, for example, possess a load-bearing capacity adequate for this purpose.

[0010] The grid can be square. Accordingly, the intersection points can have a uniform distance to each adjacent intersection point.

[0011] In one embodiment, the heavy-duty double floor slab has a column-free section aligned along two vertical edges of the heavy-duty double floor slab, each extending over at least 100 cm.

[0012] Accordingly, the column-free section extends over an area of ​​at least 100 cm x 100 cm. This allows for a particularly large column-free section to be provided over a compact area. If two or more heavy-duty raised floor panels are arranged directly adjacent to each other, an area of ​​at least 200 cm x 100 cm can be provided column-free beneath the heavy-duty raised floor panels.

[0013] The top surfaces of the supported raised floor slabs can form a continuous, flat floor.

[0014] In particular, the raised floor panels can be unconnected and, for example, free of any fastenings to one another. The top surface of one or more of the raised floor panels can be solid or perforated. For example, a raised floor panel can have a plurality of holes, thereby allowing an airflow, particularly laminar or at least low-turbulence, through the respective raised floor panel.

[0015] For example, the flat floor can be seamless and / or stepless.

[0016] This makes cleaning and disinfection of the floor particularly easy. Such designs are especially advantageous in cleanroom flooring systems. For example, the floor can be covered with a suitable surface material, such as resin tiles or polyvinyl chloride (PVC).

[0017] Adjacent grid intersections can be a maximum of 70 cm or a maximum of 80 cm apart. In particular, adjacent grid intersections can be 60 cm apart.

[0018] This corresponds to typical interpretations of the grid size for specifying the arrangement of the vertical stands, which are already regularly found in the field.

[0019] The heavy-duty double floor plate can have a square base area with an edge length of at least 100 cm or at least 120 cm.

[0020] In particular, the edge length of a square heavy-duty raised floor panel can be 120 cm. This corresponds to twice the distance between two intersections in a 60 cm grid. Such a design allows for particularly easy integration of a heavy-duty raised floor panel into an existing cleanroom floor system with a stud frame in which the vertical studs are arranged at the intersections of a rectangular grid spaced 60 cm apart. For example, the heavy-duty raised floor panel can thus replace four square raised floor panels with an edge length of 60 cm. In this configuration, the heavy-duty raised floor panel can cover one intersection of the grid and remain free of studs at that intersection. The total number of vertical studs required for support over the area covered by the heavy-duty raised floor panel can thus be reduced by one.If two raised floor panels are designed as immediately adjacent heavy-duty raised floor panels that replace a total of eight square raised floor panels with an edge length of 60 cm, the total number of required vertical supports can be reduced by three.

[0021] In one embodiment, the heavy-duty raised floor slab has a maximum thickness of 6 cm, for example 5 cm. Alternatively or additionally, the heavy-duty raised floor slab can be designed to have a minimum load-bearing capacity of 10 kN / m². 2 to bridge a span of at least 100 cm along the edges of its base or at least 150 cm along the diagonals of its base without supports.

[0022] This allows for a particularly efficient design of the heavy-duty double floor slab with a low surface weight and a low construction height.

[0023] The heavy-duty double floor slab can include an outer support frame for resting on at least four vertical columns and a lower shell on which a corrugated sheet is arranged, on which an upper shell rests.

[0024] The four vertical supports are those located in the four corners of the heavy-duty double floor slab.

[0025] Such a design allows sufficient stability for the heavy-duty double floor slab to provide a column-free section extending over at least 100 cm, while maintaining a sufficiently low surface weight.

[0026] One or more of the vertical supports and one or more parts of the heavy-duty raised floor panel, such as the support frame or the base, can each have elements of a cooperating locking device for the at least horizontally fixed relative arrangement of these two components. For example, the part(s) of the heavy-duty raised floor panel and the vertical supports can each have several, in particular the same number, locking device elements. For example, the locking device elements can be one or more springs or pins, for example on the side of one or more of the vertical supports, such as in their respective support plates, and corresponding grooves or holes, for example on the side of the support frame or the base. The locking device can be designed to form a positive-locking connection between the part(s) of the heavy-duty raised floor panel and a vertical support.Furthermore, the support frame can be designed with lateral recesses into which corresponding elements of another support frame of another heavy-duty raised floor panel can engage for at least a two-dimensionally fixed relative arrangement of the two support frames, and thus of the two heavy-duty raised floor panels. In this way, a seamless connection of two heavy-duty raised floor panels can be achieved particularly easily.

[0027] Additionally, the lower shell can be designed in the form of a tray into which the corrugated sheet is inserted. The upper shell can also be designed in the form of a tray that rests on top of the corrugated sheet.

[0028] When used as a cleanroom floor, horizontal forces, such as footsteps on the top of the heavy-duty raised floor panel, can cause undesirable relative horizontal displacement of the panels both relative to the corrugated sheet and to each other. By designing the lower and / or upper panels in a trough shape, the individual components can be arranged with a horizontal positive fit, thus effectively preventing undesirable relative displacement of the panels both relative to the corrugated sheet and to each other. With a locking mechanism that sufficiently limits the relative horizontal displacement of these components, the number of additional connections between these components using appropriate fasteners can be reduced, or the need for such connections can even be eliminated entirely.

[0029] In one embodiment, the support frame has a horizontal section that supports the lower shell.

[0030] By providing a horizontal section supporting the lower shell, a particularly advantageous transfer of the weight force acting on the heavy-duty raised floor slab into the vertical supports can be achieved. A full-surface design of the horizontal section is not required. In particular, the supporting frame can have a central recess and, for example, be formed only over a portion of the edge lengths of the heavy-duty raised floor slab. For instance, the edges of the central recess can be parallel to the edges of the heavy-duty raised floor slab.

[0031] Alternatively or additionally, the support frame can have a horizontal and a vertical section, wherein the horizontal section supports the lower shell and / or the vertical section directly adjoins the upper shell, the corrugated sheet, or the lower shell. In particular, the support frame can have an L-shape.

[0032] By providing a vertical section adjacent to the upper shell, corrugated sheet, or lower shell, these components can be enclosed, thus creating additional protection against unwanted relative horizontal displacement between the support frame and the other components. This also allows for a defined maximum horizontal displacement of the components enclosed by the support frame. In this way, with a suitable design of the corrugated sheet, upper, and lower shells—for example, a positive-locking design in the horizontal direction—sufficient protection against horizontal displacement of all components of the heavy-duty raised floor panel relative to each other can be achieved. Additional fastenings between the components may then be required only to a lesser extent or even not at all.

[0033] In one embodiment, the support frame is designed as a tubular frame, with the lower shell connected to the tubular frame in such a way as to create a load-bearing connection. A tubular frame is defined as a support frame whose struts are formed by a hollow profile. The hollow profile can be rectangular, for example, with rounded corners. The tubular frame and lower shell can be arranged in the heavy-duty raised floor panel in such a way that the force of gravity acting on the heavy-duty raised floor panel is transferred to the vertical supports solely via the tubular frame. For example, the lower shell is attached to the tubular frame in a suitable manner. The lower shell and tubular frame can be arranged so that the underside of the lower shell and the underside of the tubular frame are flush or stepped relative to each other.For example, in a stepped arrangement, the lower shell and the tubular frame can be arranged such that the underside of the lower shell is vertically higher than the underside of the tubular frame. The upper shell can have a greater thickness than the lower shell, particularly in a horizontal section. For example, the thickness of the upper shell can be between 2 mm and 4 mm. The upper shell can be attached to the tubular frame, for example, by one or more spot welds or welds.

[0034] For example, the top surface of the heavy-duty double floor panel can be formed by a top surface of the vertical section and / or a top surface of the upper shell.

[0035] Accordingly, the top surface of the heavy-duty raised floor panel, and thus the portion of the cleanroom floor system provided by the heavy-duty raised floor panel, can be defined by the upper shell alone or by the upper shell and the supporting frame. In a configuration where the top surface of the heavy-duty raised floor panel is defined by a combination of the upper shell and the supporting frame, the height of the vertical section can be adjusted to the vertical position and orientation of the upper surface of the upper shell so that the upper surface of the vertical section and the upper surface of the upper shell lie in a common plane. In this way, the top surface of the heavy-duty raised floor panel can be designed with stepless height adjustment. Furthermore, if the upper shell and the vertical section are arranged directly adjacent to each other, the top surface of the heavy-duty raised floor panel can be designed to be virtually seamless.If the top shell alone defines the top surface, a seamless design can be achieved. For example, the heavy-duty raised floor panel can have a uniform thickness.

[0036] In one embodiment, one, several or all side surfaces of the heavy-duty double floor plate can be formed by the support frame and / or by the upper shell.

[0037] For example, the design of the respective side surfaces can be determined solely by the design of the supporting frame or the upper shell. The respective component can completely cover the respective side walls, thus providing, for example, a uniform wall design. In this way, the design of the side surfaces can be executed uniformly, regardless of any individual shapes of other components of the heavy-duty raised floor panel, such as the lower shell or the corrugated sheet, which may vary along different edges of the heavy-duty raised floor panel.

[0038] Alternatively, the respective side walls can be formed by either the supporting frame or the upper shell. In this case, for example, the maximum horizontal extension of the heavy-duty raised floor panel along an edge can be defined by only one of the two components, ensuring a positive fit with the other components of the heavy-duty raised floor panel. This provides additional protection against unwanted relative horizontal displacement and sufficient protection against horizontal displacement of all components of the heavy-duty raised floor panel relative to each other. Additional fastenings between the components may then be required only to a reduced extent or even not at all.

[0039] Furthermore, the corrugated sheet can have alternating horizontal and vertical sections. These alternating horizontal and vertical sections can define a profile with alternating grooves and plateaus. In particular, two or more, especially all, plateaus can be arranged in a common plane, and / or two or more, especially all, grooves can be arranged in a common plane.

[0040] With this type of corrugated sheet metal design, a particularly advantageous ratio between stability and surface weight can be achieved.

[0041] In one embodiment, the cleanroom flooring system comprises an electrically conductive connecting element that contacts the corrugated sheet, the lower shell, and / or the support frame. Alternatively, one or more connecting elements may be provided that electrically connect the upper shell and the corrugated sheet, the upper shell and the support frame, and / or the corrugated sheet and one or more of the vertical supports.

[0042] Such a connecting element can be implemented, in particular, for electrical potential equalization between the components of the heavy-duty double floor slab. This prevents electrostatic charging. The connecting element can be pin-shaped and, for example, designed as a nail, screw, or rivet.

[0043] The supporting frame, the lower shell, and / or the upper shell can each be made of steel, particularly stainless steel, or of aluminum. The corrugated sheet can also be made of steel, particularly stainless steel, or of aluminum.

[0044] This enables cost-effective manufacturing of the heavy-duty raised floor slab while maintaining sufficient design flexibility and low weight. Furthermore, the simple material variation allows for the fulfillment of diverse requirements arising from the environments of its subsequent use.

[0045] The heavy-duty raised floor slab can have a vertically extending, planar overlap area in which the lower shell, the upper shell, and the supporting frame overlap directly adjacent to one another. In particular, such an overlap area can be provided on all side surfaces of the heavy-duty raised floor slab.

[0046] A suitable design allows for the horizontal fixing of the individual components of the heavy-duty double floor slab relative to each other. In this way, effective protection against unwanted relative horizontal displacement can be achieved in a structurally simple manner.

[0047] For example, the upper shell and / or the lower shell can each be bonded to the corrugated sheet, for example to horizontal sections of the corrugated sheet, using an adhesive bond. Alternatively or additionally, the supporting frame can be bonded to the upper shell and / or the lower shell using one or more adhesive bonds.

[0048] Adhesive bonding offers simple and cost-effective ways to fasten the respective components together, providing sufficient stability.

[0049] The embodiments and configurations described above are merely to be understood as examples and are not intended to limit the present invention in any way.

[0050] The invention is explained in more detail below with reference to the accompanying drawings and by way of example of advantageous embodiments. The drawings show: Fig. 1 a schematic representation of an embodiment of a cleanroom floor system according to the invention in top view; Fig. 2 a schematic representation of a section of a cleanroom floor system according to the invention in a side sectional view with a heavy-duty double floor panel according to a first embodiment; and Fig. 3 a schematic representation of a section of a cleanroom floor system according to the invention in a side sectional view with a heavy-duty double floor panel according to a second embodiment.

[0051] In Fig. Figure 1 is an exemplary cleanroom floor system 1 shown schematically in plan view. The cleanroom floor system 1 comprises a framework 12 and a plurality of raised floor panels 10, each having a rectangular base area, which are placed on the framework 12.

[0052] The framework 12 comprises a plurality of vertical studs 14 arranged at the intersections of a rectangular grid 13, with each double floor slab 10 being supported at each of its four corners by a vertical stud 14. The grid 13 is square, and the intersections are spaced uniformly 60 cm apart from each adjacent intersection.

[0053] The vertical stands 14 are each individually height-adjustable and designed to support up to four raised floor panels 10, for which purpose they each include a suitable support plate for the raised floor panels 10.

[0054] The raised floor panels 10 have a square base and are arranged such that each of their four corners lies at an intersection of the grid 13 and is supported by a vertical column 14 located at that intersection. Each raised floor panel 10 comprises a column-free section aligned along a first edge (in the x-direction) and a second edge (in the y-direction). No support is present or required for the respective raised floor panel 10 within the column-free section.

[0055] Two of the raised floor panels 10 are designed as conventional raised floor panels 21 with an edge length of 60 cm. The column-free section of these conventional raised floor panels 21 thus extends over a maximum of 60 cm.

[0056] Two of the raised floor panels 10 are designed as heavy-duty raised floor panels 20 with an edge length of 120 cm, in which the column-free section 22 extends along both edges for more than 100 cm each and has a square base area. The column-free section 22 of the heavy-duty raised floor panels 20 can thus have a base area approximately four times larger than the column-free section of the conventional raised floor panels 21.

[0057] In the example of the Fig. 1. A vertical support 14 is required to support the conventional raised floor panels 21 at each intersection point of the grid 13 and to support the heavy-duty raised floor panels 20 at every second intersection point of the grid 13. Accordingly, the vertical supports 14 required at each of the four corners of the raised floor panels 10 for support are located at the points shown in Fig. 1. Intersection points of the grid 13 are marked with a black dot. Optionally, a heavy-duty double floor panel 20 can be supported by additional vertical supports 14, which can be arranged, for example, at an edge. Thus, in Fig. 1. In the heavy-duty double floor plate 20 shown on the right, an additional vertical support 14 is arranged in the middle of the upper edge running in the y-direction.

[0058] Due to the design of the overlying raised floor panels 10 as heavy-duty raised floor panels 20, vertical supports 14 are neither required nor provided at the intersection points of the grid 13 marked with a white cross. In particular, in the illustrated embodiment, vertical supports 14 can be omitted in a complete row (in the y-direction) of intersection points of the grid 13 marked with a white cross.

[0059] Thus, a column-free cavity can be provided below the two heavy-duty raised floor panels 20, for example for laying utility lines and supply cables, the dimensions of which in the x and y directions are many times greater than those of the column-free cavity located under the two conventional raised floor panels 21. This offers, in particular, increased flexibility in laying utility lines and a less restricted working area.

[0060] The upper surfaces of the installed raised floor panels 10 are directly adjacent to each other and lie in a common plane. Accordingly, the cleanroom floor system 1 has a continuous, flat floor which is seamless and stepless.

[0061] The Fig. 2 and Fig. Figure 3 shows a schematic representation of a section of the cleanroom floor system 1 of the Fig. 1 in lateral section view along the in Fig. 1. The section runs parallel to an edge of a heavy-duty raised floor panel 20 extending in the x-direction, which is in Fig. 1 according to a first embodiment and in Fig. Figure 3 shows a second embodiment. Also shown is one of the vertical supports 14 on which the heavy-duty double floor slab 20 rests. The heavy-duty double floor slab 20 is designed to have a minimum load-bearing capacity of 10 kN / m². 2 To bridge a span of at least 100 cm along the edges of its base or at least 150 cm along the diagonals of its base without supports. The heavy-duty double floor slab 20 has a uniform thickness (in the z-direction) of 5 cm.

[0062] In both embodiments, the heavy-duty double floor panel 20 comprises an outer support frame 24 for resting on at least the four vertical supports 14 arranged in the corners of the heavy-duty double floor panel 20. Furthermore, the heavy-duty double floor panel 20 comprises a lower shell 26 on which a corrugated sheet 30 is arranged. An upper shell 28 rests on the corrugated sheet 30. The support frame 24, the lower shell 26, and the upper shell 28 are each made of stainless steel.

[0063] The lower shell 26 is designed in the form of a trough into which the corrugated sheet 30 is inserted. The upper shell 28 is designed in the form of a trough that rests on the corrugated sheet 30. Accordingly, the lower shell 26 and the upper shell 28 each have a horizontal section extending across the xy-plane and a vertical section extending across the yz-plane. The support frame 24 is attached to both the lower shell 26 and the upper shell 28 by means of adhesive bonds.

[0064] The corrugated sheet 30 has alternating horizontal sections 310 and vertical sections 320, forming a profile with alternating grooves and plateaus extending in the y-direction along the x-axis. The lower shell 26 is connected to a horizontal section 310 of a groove by means of an adhesive bond and is thus attached to the corrugated sheet 30. The upper shell 28 is also attached to the corrugated sheet 30, for which purpose at least one adhesive bond is provided in a horizontal section 310 of a plateau.

[0065] In the exemplary embodiment of the Fig. 2 The supporting frame 24 is L-shaped and has a horizontal section 241 extending in the x and y directions and a vertical section 242 extending in the y and z directions. The horizontal section 241 supports the lower shell 26. All side surfaces 220 of the heavy-duty double floor slab 20 are formed by the vertical section 242, which completely covers the side walls 220.

[0066] The vertical section 242 borders directly on the vertical section of the upper shell 28, which in turn borders on the vertical section of the lower shell 26. This results in a vertically extending, planar overlap area 230, extending along the edges of the heavy-duty double floor slab 20 across all side surfaces 220, in which the trough-shaped lower shell 26, the trough-shaped upper shell 28, and the L-shaped support frame 24 overlap directly adjacent to one another. This achieves a horizontal fixation of the lower shell 26 and the upper shell 28 to each other and to the support frame 24, thus preventing any horizontal relative movement of these components.

[0067] The support frame 24 is not formed across its entire surface in the xy-plane, but rather has a central opening. Accordingly, the support frame 24 has a central recess that is parallel to the edges of the heavy-duty double floor panel 20 running in the x and y directions, and thus has a square shape in the xy-plane.

[0068] As elements of a cooperating locking device, the support frame 24 has recesses 44 in the horizontal section 241, and the vertical uprights 14 each have corresponding projections 42. The projections 42 are each arranged in the support plates of the vertical uprights 14. When the heavy-duty double floor panel 20 is properly placed on the vertical uprights 14, the projections 42 can engage in the recesses 44, thus enabling a horizontally fixed support of the heavy-duty double floor panel 20 relative to the vertical uprights 14 in the xy direction.

[0069] The top surface 210 of the heavy-duty double floor panel 20 is formed by a top surface 244 of the vertical section 242 and a top surface 284 of the upper shell 28, which are directly adjacent to each other and lie in a common xy-plane. Accordingly, the top surface 210 is designed to be stepless and virtually seamless.

[0070] Furthermore, a pin-shaped electrically conductive connecting element 34 is provided, which contacts the corrugated sheet 30, the lower shell 26 and the support frame 24 for the purpose of electrical potential equalization.

[0071] In the exemplary embodiment of the Fig.3 The support frame 24 is designed as a tubular frame, the struts of which form a rectangular hollow profile with rounded corners. The lower shell 26 is arranged with the tubular frame in the heavy-duty double floor plate 20 and connected to each other in such a way that their undersides are flush with each other, and the lower shell 26 and tubular frame rest side by side on the vertical support 14.

[0072] The upper shell 28 has a greater thickness in a horizontal section than the lower shell 26 in a horizontal section. In the example shown, the thickness of the upper shell 28 is a uniform 3 mm. The upper shell 28 is attached to the corrugated sheet 30 by means of at least one adhesive bond arranged in a horizontal section 310 of a plateau. Additionally, the upper shell 28 is attached to the tubular frame by means of several spot welds.

[0073] The lower shell 26 is attached to the corrugated sheet 30 in at least one horizontal section 310 of a trench by means of an adhesive connection.

[0074] All side surfaces 220 of the heavy-duty double floor panel 20 are formed by both the tubular frame and the upper shell 28. The trough-shaped upper shell 28 is designed such that its vertical sections, which extend flat in the yz-plane, form the side wall 220, thus defining the maximum horizontal extent of the heavy-duty double floor panel 20. Accordingly, a horizontal positive fit is established between the upper shell 28 and the tubular frame, preventing any horizontal relative movement of these components. The lower shell 26 and the corrugated sheet 30 each abut directly against the tubular frame in the horizontal direction, thus also achieving horizontal fixation of these components relative to the tubular frame.

[0075] The top surface 210 of the heavy-duty double floor panel 20 is formed by the top surface 284 of the upper shell 28. The top surface 210 is designed to be stepless and seamless.

Claims

[1] Cleanroom floor system (1) with a framework (12) and with a plurality of raised floor panels (10) placed on the framework (12), wherein the raised floor panels (10) each have a rectangular base area, wherein the framework (12) comprises a plurality of vertical uprights (14) arranged at the intersections of a rectangular grid (13), such that each raised floor panel (10) is supported at each of its four corners by a vertical upright (14), and wherein at least one of the raised floor panels (10) is designed as a heavy-duty raised floor panel (20) which has a stand-free section (22) oriented along one of its edges, extending over at least 100 cm. [2] Cleanroom floor system (1) according to claim 1, wherein the heavy-duty raised floor panel (20) has a support-free section (22) aligned along two vertical edges of the heavy-duty raised floor panel (20), each extending over at least 100 cm. [3] Cleanroom floor system (1) according to one of the preceding claims, wherein the top surfaces of the supported raised floor panels (10) form a continuous planar floor. [4] Cleanroom floor system (1) according to claim 3, wherein the flat floor is seamless and / or stepless. [5] Cleanroom floor system (1) according to one of the preceding claims, wherein adjacent intersection points of the grid (13) have a distance of 60 cm, of a maximum of 70 cm or of a maximum of 80 cm from each other. [6] Cleanroom floor system (1) according to one of the preceding claims, wherein the heavy-duty double floor panel (20) has a square base area with an edge length of at least 100 cm or at least 120 cm. [7] Cleanroom floor system (1) according to one of the preceding claims, wherein the heavy-duty raised floor panel (20) has a maximum thickness of 6 cm, for example 5 cm, and is designed to provide a minimum load-bearing capacity of 10 kN / m² 2 to bridge a span of at least 100 cm along the edges of its base or at least 150 cm along the diagonals of its base without supports. [8] Cleanroom floor system (1) according to one of the preceding claims, wherein the heavy-duty double floor panel (20) comprises an outer support frame (24) for resting on at least four vertical uprights (14) and a lower shell (26) on which a corrugated sheet (30) is arranged, on which an upper shell (28) rests. [9] Cleanroom floor system (1) according to claim 8, wherein the lower shell (26) is designed in the form of a tray into which the corrugated sheet (30) is inserted, and / or wherein the upper shell (28) is designed in the form of a tray which is placed on the corrugated sheet (30). [10] Cleanroom floor system (1) according to one of claims 8 or 9, wherein the support frame (24) has a horizontal section (241) which supports the lower shell (26). [11] Cleanroom floor system (1) according to one of claims 8 to 10, wherein the support frame (24) has a vertical section (242) that is directly adjacent to the upper shell (28), the corrugated sheet (30) or the lower shell (26). [12] Cleanroom floor system (1) according to claim 11, wherein the top (210) of the heavy-duty double floor panel (20) is formed by a top (244) of the vertical sub-area (242) and / or a top (284) of the upper shell (28). [13] Cleanroom floor system (1) according to one of claims 8 to 12, wherein one, several or all side surfaces (220) of the heavy-duty double floor panel (20) are formed by the support frame (24) and / or by the upper shell (28). [14] Cleanroom floor system (1) according to any one of claims 8 to 13, wherein the corrugated sheet (30) has alternating horizontal sections (310) and vertical sections (320). [15] Cleanroom floor system (1) according to claim 14, wherein the alternating horizontal and vertical sections (310, 320) define a profile with alternating trenches and plateaus. [16] Cleanroom floor system (1) according to one of claims 8 to 15, comprising an electrically conductive connecting element (34) that contacts the corrugated sheet (30), the lower shell (26) and / or the support frame (24). [17] Cleanroom floor system (1) according to any one of claims 8 to 16, wherein the support frame (24), the lower shell (26) and / or the upper shell (28) are formed from steel, in particular stainless steel, or from aluminium. [18] Cleanroom floor system (1) according to one of claims 8 to 17, wherein the heavy-duty double floor panel (20) has a vertically extending planar overlap area (230) in which the lower shell (26), the upper shell (28) and the support frame (24) overlap directly adjacent to each other. [19] Cleanroom floor system (1) according to any one of claims 8 to 18, wherein the lower shell (26) and the upper shell (28) are each connected to the corrugated sheet (30) by means of an adhesive bond, and / or wherein the support frame (24) is connected to the upper shell (28) and / or to the lower shell (26) by means of an adhesive bond.

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