EP0013570A1 - Elevated flooring system - Google Patents

Abstract

1. An elevated flooring system comprising cantilevered composite slabs (1) supported in punctiform by stays (5), said slabs consisting of a deep-drawn, distortion-free and true to size, tub-shaped frame (11) of steel, into which is introduced an easy-to-pour respectively able to-flow hardening filling material (12), and into which are engaging fastening members projecting form the stays (5) through openings in the corner areas of the bottom part of the frame, characterized in that in the stays (5) and the composite slabs (1) sleeves (4, 8) are arranged in alignment with one another, at least one of said sleeves being provided with an internal thread, said sleeves receiving a threaded rod (3) adjustable up and down, on said rod the composite slab (1) being located and the sleeve (8) of the composite slab (1) substantially penetrating said slab and being embedded in the filling material (12) such that the threaded rod (3) is accessible and adjustable from the top, and that the stays (5) for receiving the corner areas of several composite slabs (1) are developed in one corner junction, in said corner junction on the stay (5) coinciding corner areas of the composite slabs (1) are respectively covering one sector surface of an upper supporting surface of the stay (5) and in each sector surface a sleeve being provided for the transverse reception of the threaded rod (3) of the corresponding corner area of the composite slab (1).

Description

The invention relates to a raised floor system, in the cantilevered, punctiform support on composite plates, which consist of a deep-drawn, torsion-free and dimensionally accurate frame, in the bulk or. flowable hardening filler material is introduced and engage in the fastening members protruding from the supports through openings in the corner regions of the bottom of the frame.

In such a known system, the frame of the composite panel consists of a deep-drawn tub (DE-PS 2 004 101). Bolts protrude from the upper flange of the supports and into the interior of the frame trough through openings in the bottom of the frame trough, which are arranged in the corner regions of the frame trough. Cavities for the bolts are provided here in the filler material. In this way, the composite panel is connected to the supports. This connection is not suitable for height adjustment of the composite panel. Additional measures must be provided for this. You can also If there are strong shear stresses, such as those caused by heavy loads moving on the slabs, the bolts work into the side of the concrete and grind it, so that the secure hold of the composite slabs on the supports is lost and a certain "slate effect" results , which can lead to collapse of the remaining plates when they are loaded when individual plates are loaded.

This known composite panel also has the disadvantage that it derives its strength for absorbing large loads only from the steel frame. At high point loads, the concrete easily becomes noticeable, since the plate edges are only connected to each other via the trough floor, which is the only reinforcement here, and therefore buckle slightly under the load. Achbarzonen in the _north then the concrete and the break Platte.wird unusable.

To avoid such disadvantages, the plate would have to have a relatively large thickness, which would require a large amount of material and would be heavy.

In order to counter these disadvantages, raised access floor panels with reinforcement have already been proposed (DE-GM 7 523 591). The frame is welded together from angle profiles, stiffening triangles are welded in its corners and about 1/3 of the total frame height is a wire reinforcement with the tips of the wires welded to the frame. Although this reinforcement is in the tensile zone, there is no link with high tensile strength in the zone of the highest tensile stress. The filling material, which is here with high tension exposed to stress, is easily cracked and crumbled. The load-bearing capacity of the plate quickly decreases with heavy loads.

How the plate is connected to any supports and adjusted to absorb any pushing forces is not specified.

In a further double floor system, the composite panels are supported by threaded bolts, which are height-adjustable in the collar located on the Ge _{7 building} floor. (D _E -OS 15 09 423). The adjusting ring is rotated for adjustment. The threaded bolt is held in place by a cross rib arrangement on its head, which engages in the joints of the four composite plates carried by the head, so that it cannot turn when the adjusting ring is turned. In this way, the height of the four colliding plate corners can be changed together. An individual adjustment of each plate relative to the others is not possible.

In the case of installed panels, the adjusting ring is not accessible, so that the adjustment - since it is not possible from above - is very complicated. At least one plate must always be recorded.

A transfer of shear forces is not possible with this support structure, because the supports, i.e. here the collar just sits on the floor construction and is not attached. Shear forces that occur must be transmitted through the composite panels to adjacent panels, for which purpose cross-shaped wedges are provided in the joints at the meeting point of four panels.

Two ways are described in the manufacture of the composite panel according to DE-PS 2 004 101. The filling material is filled into the upwardly open frame trough and the excess is either stripped off, which leads to a rough surface, or it is pressed down to the edge of the frame by a press ram, the excess being squeezed out through bottom openings. The latter method is said to result in better surface quality.

In a further development of this method, it is proposed to place the frame tub upside down on a table and to fill it through openings in the bottom of the tub (DE-AS 2 242 607). This is intended to achieve a further rationalization of production and the saving of molds with numerous outlet openings for excess filling material.

Measures for connecting these composite panels with a support system for adjusting the panels and for absorbing pushing forces are not explained here.

According to DE-GM 7 534 591, the frame is also filled with concrete from above. Since post-processing of the hardened concrete surface would require a lot of work to achieve the desired surface quality and dimensional accuracy, easier-to-machine support points are provided here, which are pressed into the still soft filling material and later sanded down.

The invention is therefore based on the object to further develop a raised floor system of the type mentioned in that the plates Easier to assemble and adjust are mutually interchangeable and the system as an industrial floor can safely absorb high pushing forces and shear stresses resulting from the movement of heavy loads without being loosened by prolonged use.

This object is achieved in that in the supports and the composite plates aligned sleeves are arranged, of which at least one is provided with an internal thread, which receive a height-adjustable threaded rod on which the composite plate is mounted and the sleeve of the composite plate essentially penetrates it and is embedded in the filler material, and in that the supports for receiving the corner regions of a plurality of composite panels are formed in a corner joint, with corner regions of the composite panels meeting one another in a corner joint on the support. Cover the sector surface of an upper wing of the support and a receptacle for the shear-resistant connection of the sleeve and / or the threaded rod of the corresponding corner region of the composite panel is provided in each sector surface.

As a result, the double floor according to the invention can absorb shear stresses under high loads even if for some reason the floor is not completely closed, but one or more plates or even a row of plates is removed.

Despite the small thickness, a composite panel according to the invention has a rigidity which is far superior to that of the known panels, since it has a high-strength part in the area of the highest tensile stresses, namely the steel base part of the frame and additionally closer to the neutral zone, but still in the area of the tensile stress has welded reinforcement on the side walls of the frame. In addition, the frame is stiffened by beads and provided with corner stiffeners.

Finally, the strength of the frame can be increased or increased by using a filler material with high tensile strength, such as glass fiber reinforced concrete. the thickness of such a plate and thus its weight can be further reduced.

The design of the system according to the invention enables simple, quick and labor-saving laying, in particular simple and quick adjustment, in order to achieve a completely flat surface.

This is achieved by the design and arrangement of the mounting members that connect the plates to the supports. The plates can be adjusted in their height by simply turning the threaded rods.

The individual supports are connected to each other by fire-resistant bulkheads or rods that can be inserted between them. The bulkheads are held in vertical slots in the supports. Anchor sleeves are provided in the supports, through which the bulkheads or rods are firmly connected to the supports. This results in a stable, inherently stable and shear-resistant system. It allows the use of individual panels freely in space as an "island", i.e. without the need to lean a plate against an adjacent or an adjacent wall. If individual plates are taken up for maintenance work or the like, the neighboring ones remaining in position can easily be loaded and driven on.

Since the threaded rods are held in metallic sleeves, which are themselves encased in concrete, loosening of the fastening is impossible even under heavy loads over long periods.

Further details and advantageous embodiments of the system according to the invention are explained in more detail below with reference to the accompanying drawings.

• Fig.l eine perspektivische Ansicht der Gesamtanordnung;
• Fig. 2 einen vergrößerten Vertikalschnitt durch eine Stütze und einen Teil einer aufgelegten Verbundplatte;
• Fig. 3 eine Draufsicht auf einen ungefüllten Rahmen auf einer Stütze nach Fig. 2; für Eckanordnung der Platte Stütze eingeschoben (gestrichelt)
• Fig. 4 eine andere Stützenform teilweise im Schnitt;
• Fig. 5 eine Noppenscheibe im Schnitt;
• Fig. 6 Draufsicht auf die Noppenscheibe nach Fig. 5;
• Fig. 7 .Draufsicht auf die Anordnung nach Fig. 4;
• Fig. 8 eine weitere Ausbildung einer Stütze;
• Fig. 9 Draufsicht auf die Anordnung mit Stützen nach Fig. 8;
• Fig. 10 eine weitere Ausbildung der Stütze;
• Fig. 11 Ansicht eines Schottes zwischen zwei Stützen;
• _Fig. 12 Schnitt durch eine andere Ausbildung und Anordnung der Hülse in der Verbundplatte.

Show it

• Fig.l is a perspective view of the overall arrangement;
• Figure 2 is an enlarged vertical section through a support and part of a composite panel placed.
• 3 shows a plan view of an unfilled frame on a support according to FIG. 2; for corner arrangement of the slab support inserted (dashed)
• Figure 4 shows another pillar shape, partly in section;
• 5 shows a knob disk in section.
• Fig. 6 top view of the knob disk of FIG. 5;
• FIG. 7 top view of the arrangement according to FIG. 4;
• 8 shows a further embodiment of a support;
• Fig. 9 top view of the arrangement with supports according to Fig. 8;
• 10 shows a further embodiment of the support;
• Fig. 11 view of a bulkhead between two supports;
• _F ig. 12 Section through a different design and arrangement of the sleeve in the composite panel.

In Fig. 1, a composite plate 1 is shown, which is supported on bundles 2 of the threaded rods 3. The threaded rods 3 are screwed into sleeves 4 with an internal thread, which are cast into supports 5, and can be adjusted by turning the height. The threadless upper end of the threaded rod 3 engages in a sleeve 8 inserted in each corner of the composite panel 1 without an internal thread. The upper, open end of the sleeve 8, which the Ver Pen ^p 1 penetrated is closed by a removable cap 7, for example made of plastic, the surface of which is flush with the surface of the composite plate 1.

In another embodiment, the sleeve 8 in the composite plate 1 is designed with an internal thread and the sleeve 4 in the support 5 without an internal thread. The appropriately designed threaded rod 3 then carries the plate 1 over the thread and is supported in the sleeve 4 on the bottom thereof on a pressure-resistant insulation cushion 10.

In a third embodiment, both sleeves 4 and 8 are provided in the support 5 or the composite plate 1 with an internal thread, namely a right-hand thread in one and a left-hand thread in the other. The threaded rod accordingly has two mutually opposite threaded parts.

The supports 5 are cast from concrete, they can have a square cross section with beveled edges. One sector of each of its supporting surface is covered by a corner of a composite panel 1. The column connection to the plate is located in the center of each sector. The supports can be stiffened by reinforcement (not shown). Since they have the same cross-section over their entire height, the loads of each individual composite panel are transferred centrally through the support to the floor, so that no tilting moment acts on the support, even if only one panel 1 rests on the support. An insulating plate made of rubber or the like can be arranged on the supporting surface of the support 5.

In the head of the support 5, intersecting grooves 34 can be provided, into which U-profiles open at the top are inserted that extend from one column to the next and with their legs each reach under one of two neighboring plates, of which the upper edge is separated by a gap. The U-space is filled with material that foams in the heat, so that the joint between two panels is sealed in the event of fire and any air flow is prevented.

The sleeve 8 can be provided at its lower end with an outwardly projecting collar 8b (FIG. 12). The bottom of the frame 11 is pressed in the area of the sleeves 8 in the form of a circular bead 13f to such an extent that the collar 8b abutting the circular horizontal upper surface of the bead 13f is flush with the lower surface of the frame bottom. The sleeve 8 sits with a press fit in the opening in the bead 13f. The outer cylindrical outer surface 8c of the sleeve 8 is roughened or designed as a polygon to reliably prevent rotation of the sleeve 8 in the surrounding concrete.

In the vertical sides of the supports 5, axially parallel grooves 5a are arranged, in the bottom of which anchor sleeves 35 are attached. Fireproof bulkheads 5b can be pushed into the grooves 5a. At the ends of the bulkheads 5b, recesses 36 are provided, which are spanned by metal strips 38 fastened to the bulkheads (FIG. 11).

A bore 37 is provided in the metal strip 38 centrally to the center of the recess 36, so that the metal strip can be tightened against the anchor sleeve 35 by a screw 39. In a similar manner, a rod 5c can also be fastened to the anchor sleeves 35, so that there is a firm bond between the support system for the composite panel 1.

The composite panel 1 is essentially formed from a frame 11 which is filled with filler material 12. In the frame is a reinforcement 9, e.g. Welded structural steel mesh.

The frame 11 is a deep-drawn, dimensionally accurate steel component, the upper edge 11a of which is flanged to the outside and the lower edge 11b of which is folded inwards, so that a lower opening 6a remains, the inner edge of which is also flanged, through which the filler material 12 is introduced. In the horizontal bevelled edge part 11b beads 11c are pressed, which have a diameter of about 20 mm and whose edges protrude into the frame and thus anchor the filler material 12. In addition, holes for receiving and fixing the sleeves 8 are provided in the corners.

The composite panel 1 optionally has openings 6 through the filling material 12 and the reinforcement 9, shown in dash-dot lines in FIG. 1, which are arranged symmetrically to the center of the panel and can have a diameter of approximately 200 mm. Sockets, connections for devices, nozzle openings and the like can be accommodated in them. They are covered in a suitable, customary manner when the connections are not in use.

In the enlarged representation according to FIG. 2 it is shown that the wire reinforcement mesh 9 can be arranged, for example, at about 1/3 frame height from the bottom of the frame 11. You can either use the wire ends directly be welded to the frame, or in the frame there are angles 13 in the corners (FIGS. 4 and 7) or an angle 13b is arranged in the frame 11, on the free legs 13a or 13c of which the reinforcement rests and is welded to them . To further stiffen the construction, the free legs 13a and 13c, through which the sleeves 8 protrude and are thereby fixed, rest on a shoulder 8a which is provided in the outer jacket of the sleeves 8. The free legs of the angles 13, 13b can also be angled downwards, so that their free edges 13e are supported on the edge part 11b (FIG. 4). It is thus ensured that the reinforcement 9 and the sleeves 8 are immovably fixed when the filling material 12 is introduced. The reinforcement 9 and the sleeves 8 are enveloped by the filling material 12. :

The upper end of the threaded rod 3 is provided with a slot 14 into which a screwdriver is inserted can, so that the rod can be rotated easily from above through the open sleeve 8. A height adjustment of each individual composite panel is therefore extremely simple according to the invention.

Another embodiment of a column 15 is shown in FIG. In this case, a flange 16 is fastened in any manner to the load-bearing base and carries a threaded rod 17 on which an adjusting nut 18 can be rotated. A bushing 20 with a collar 21 is supported on this adjusting nut 18. This sleeve 20 is inserted from below into a pipe section 19 so that the pipe section is carried by the collar 21. At the upper end of the pipe section 19, a further flange 22 is fastened, which is flanged downward at the edge for reinforcement. This flange carries a knob disk 23. Four bores 24 are arranged in the flange 22, into which the knobs 26 of the knob disk 23 engage, so that the disk 23 is held against rotation and displacement relative to the flange 22. On its upper side, the nub disk 23 also carries four knobs 25 which engage in the lower opening of the bushes 8 in the composite panels. The nub washers are made of a rubber material with a hardness of 60 - 70 Shore, which has an electrostatic resistance of 10 ² to 10 ⁶ Ohm-cm. Thus, the plates 1 are connected to the supports 15 so as to be non-displaceable. Small differences in height between the composite panels carried by the support 15 over the dimpled disc are compensated for by shims inserted between the composite panel and dimpled disc.

In a further modified embodiment of the support 33 (FIG. 8), a foot plate 27 is on the load-bearing floor arranged, the spherical cap-shaped tracks 28 for rounded cams 29 of the supports 33. The track pins 29 are fastened in tubes 30 which receive a socket 31 with a collar 32 at their upper end. The socket is equipped with an internal thread, in which a threaded rod 3 is held in a height-adjustable manner. This threaded rod 3 corresponds in design and connection with the composite plate 1 to that described in FIG. 1. When assembling the supports, they are held perpendicular to each other in any way, so that the plates can be easily placed.

FIG. 10 shows a simplified design of the support and its connection to the composite plate. The threaded rod 3 engages in the sleeve 8 without an internal thread in the composite plate 1. On the threaded rod 3, an adjusting nut 40 with collar 41 is arranged, which carries an insulating washer 42 for impact sound insulation ^q on which the composite panel 1 rests. To adjust the height of the composite sheet 1 is then stored and the adjustment nut 4 ₀ adjusted by rotation of amount. The threaded rod 3 is supported with its spherical lower end in the calotte 28 of the base plate 27.

The system also enables perfect support of any composite panel, even in the corners or on the walls of a room. In such cases, the supports are pushed so far under the plate 1 that their outer edge is flush with the outer edges of two plates (set up on a wall) or two outer edges of the support with the outer edges of a corner of the plate (when set up in a room corner) . The threaded rods 3 then connect the outer lying sleeves in the support with the sleeves 8 in the composite batten 1 (see FIG. 3).

The arrangement according to the invention ensures that the composite panels are firmly connected to the supports, which can even be connected to one another by bulkheads or rods, and that any loads and horizontal thrust forces that occur even at low dynamic loads are safely derived into the floor fla. The so-called "slate effect" can be triggered entirely. Displacements, in particular when individual plates are picked up, for whatever reason, cannot occur with the remaining plates when driving with heavy loads. The previously frequently stipulated rule that floor panels should only be taken up diagonally in order to prevent the entire surface from slipping does not need to be observed anymore.

The manufacturing process characterized in the process claims results in a labor-saving and reliable construction with the highest dimensional accuracy and the greatest surface quality.

The adjustment of the height of the individual plates is extremely simple according to the invention. It can be carried out from above by inserting a suitable tool - screwdriver, socket wrench, Allen key, depending on the shape of the head of the threaded rod - from above into the upwardly open sleeve 8 and rotating the threaded rod. In the case of support formation with threaded rod 15 and the nub washer 23 carried by it (FIGS. 4-7), only the rough adjustment of the height of the plates meeting together above the support can be made together. For fine adjustment 1 adapter plates must be inserted between the knob washer 23 and the composite panel. Although the adjustment is more complicated than in the case of the other support designs, this form of the invention has the advantage of particularly good noise damping.

The system can also be used on walls and ceilings of all kinds.

Claims (12)

1. Raised floor system with self-supporting, point-to-point composite panels, which consist of a deep-drawn, torsion-free and dimensionally accurate frame, into which pourable or flowable hardening filler material is introduced and into the fastening elements protruding from the supports through openings in the corner areas of the base part of the Intervene frame, characterized in that in the supports (5) and the composite panels (1) aligned sleeves (4,8) are arranged, of which at least one is provided with an internal thread, which receive a height-adjustable threaded rod (3) on which the composite panel (1) is mounted and the sleeve (8) of the composite panel (1) passes through it essentially and is embedded in the filling material (12), and that the supports (5) for receiving the corner regions of a plurality of composite panels (1) in a corner joint are formed, with corner areas of the composite panels meeting in a corner joint on the support (5) each having an S Cover the ector surface of an upper wing of the support and a receptacle for the shear-resistant connection of the sleeve and / or the threaded rod of the corresponding corner region of the composite panel is provided in each sector surface. 2. System according to claim 1, characterized in that the supports (5) are designed as molded articles made of a material of high compressive strength, the upper

a sleeve (4) for receiving a threaded rod is arranged in each sector. 3. System according to claim 1, characterized in that the support (15) from a threaded rod (17) which is welded to a flange (16) which can be fastened to the building floor and carries an adjusting nut (18) on which a piece of pipe (19 ), which is provided at its upper end with a flange (22) forming the upper wing. 4. System according to claim 1, characterized distinguished ^g ekenn- that the upper opening of the sleeve (8) of the composite panel (1) is closed by a removable plug (7) made of plastic, which is flush with the surface of the composite panel. 5. System according to one of claims 1 to 3, characterized in that each sector surface is delimited by grooves (34) in the wing of the supports (5). 6. System according to any one of the preceding claims, characterized in that the support (15) consists of a threaded rod (17) which is welded to a flange (16) fixed to the building floor and carries an adjusting nut (18) on which supports a pipe section (19) which is provided at its upper end with a flange (22) forming an upper wing. 7. System according to claim 6, characterized in that between the flange (22) and the composite plate (1) supported on it, a movable support (23) made of sound-absorbing insulating material with high pressure resistance is arranged. 3. System according to claim 7, characterized in that the support (23) is provided on its upper and lower sides with knobs (25, 26) which are in the sleeves (8) in the composite plate (1) on the one hand and in bores (24) engage in the flange (23) on the other hand. 9. System according to claim 8, characterized in that in the side walls of the supports (5) axially parallel grooves (5a) are provided, in the refractory bulkheads (5b) between two adjacent supports (5) can be used. 10. System according to claim 9, characterized in that the bulkheads (5b) at the ends have recesses (36) which is spanned by a metal bar (38) provided with a bore (37) and fastened to the vertical bulkhead edge . 11. System according to claim 10, characterized in that laterally in the supports one or more with the recesses (36) corresponding anchor sleeves (35) for connecting the bulkheads (5b) or other components in the support (5) are arranged. 12. System according to claims 9 to 11, characterized in that the metal strip (38) is fastened to the supports (5) by means of bolts screwed into the anchor sleeves (35).

Images