Abstract:
A holder to be placed in floating floor slabs and the installation system thereof, the holder comprising a cubic holder having a pair of tubes on each side thereof, parallel with the supporting base, with facing sides in identical position; within said sides a section designed for placing rods on which the different layers of the rebar mesh are supported and a system for fitting the mesh on the rods, and also the securing of the corners of the different levels of the rebar mesh by means of linking of the holder s using the rods.

Description:
RELATED APPLICATIONS 
     The present application is a continuation-in-part application of U.S. application Ser. No. 12/668,890 filed Jan. 13, 2010 now abandoned as a National Stage Application of PCT/ES08/00469, filed Jul. 1, 2008, claiming priority of Spanish Application No. P200701966, filed Jul. 13, 2007. 
    
    
     FIELD OF THE INVENTION 
     The technical field of the present invention pertains to a holder, which is integrated into the framework of floating slabs in the form of a poured concrete forgings, as a mechanical accessory for raising the forging once the concrete has set. These floating slabs are arranged in constructions that require an insulation of the central block, as they may be the supporting bases on which are situated electric transformers, air conditioning units, bowling alleys and, generally, sites at which it is desired to avoid the transmission of vibrations and impact noises. The technical field of the present invention pertains to a holder, which is integrated into the framework of floating slabs, and includes an accessory for raising the slab once the concrete has set. These floating slabs are arranged in constructions that require an insulation of the central block, as they may be the supporting bases on which are situated electric transformers, air conditioning units, bowling alleys and, generally, sites where it is desired to avoid the transmission of vibrations and impact noises. 
     BACKGROUND OF THE INVENTION 
     The system of creating floating slabs by means of distributing metallic containers in welded wire fabric in the form of hollow cubes that are within the forging is known. The raising phase occurs once the concrete has set, and mechanical accessories in the form of shock-absorbing elements are positioned in the hollow interiors of the holders which are coupled under beveled ribs that are located in two of the corners thereof. In this way, the raising of the floating slab will be achieved to the extent desired by means of the pressure of the shock absorbers in its upper part. 
     The welded wire fabric is usually formed by two mesh structures, each of which are created by wires that intersect one another at right angles, forming grids, whose points of contact are joined by welding. These are positioned superimposed, trying to align the grids of the two meshes for the correct insertion of holders which have a height equal to the height of the slab containing the welded wire fabrics, and are positioned within the interstices of the two meshes, so that, after the setting of the concrete, the meshes are closely aligned in the slab. For this purpose, a plurality of metallic rods are installed welded on the surface of each holder in the horizontal direction which protrude from their structure. In fixing to the rebar, in order to avoid the displacement thereof in the pouring phase of the concrete, once in the grid, the rods are fastened to the welded wire fabric by means of wires. This involves a lot of work for the operator in the positioning and a limited rigidity of the system, causing the holders to move when the concrete is poured or by the operator&#39;s own movements within the rebar. If the setting occurs with any of these elements displaced or twisted, there will be a weak zone at this point which may cause the fracture of the floating slab in the raising phase. 
     The grid of the welded wire fabric is produced by having different proportions. The prior-art system has the drawback that the rods welded to the structure of the holder are arranged so that they overlie the grid in every case, to facilitate its bundling by means of wire. For this the operator usually has problems at the time of fitting the holder in the welded wire fabric, and has to shorten the rebar to make a suitable cavity in the mesh to receive he holder. Apart from the labor-intensive work that it involves, it results in a structure that is hazardous to the work zone. Where the ends of the rods are welded together, and where the cuts made in the rebar result in many sharp points, thee is a risk to the operator in the work of positioning the wires or merely by the operator&#39;s being situated on the structure. 
     The welded wire fabric is manufactured in different extension dimensions for the different positioning sites. For this, the bonding of one surface of the welded wire fabric with those surfaces which follow it in the work is necessary. It is equally necessary to anchor the corners of the layers of the welded wire fabric, if a worker or operator goes through zones remote from the center, and creates a force on one or both of the layers, this force then causes the structure to rise. 
     Another type of element is known for positioning shock absorbers in the forging that is made up of a metallic cylinder with walls of considerable size, within which the shock absorber is arranged, having two horizontal projections in its contour for being situated in the rebar. The complexity of this structure makes the manufacture thereof very expensive, and the securing in the welded wire fabric, in spite of the weight that it has, is insufficient. 
     DESCRIPTION OF THE INVENTION 
     The present invention that is proposed fully solves the problems mentioned by presenting a holder in the form of a holder which has various horizontal tubes in its perimetral structure, at various levels. The tubes are suitable to receive rods being inserted therein, which rods may project beyond the sides of the holder for supporting the different layers of welded wire fabric above them. In this way, the first layer of the welded wire fabric will rest on the rods arranged in the lower tubes of the holder, which are facing on two of its sides; a second welded wire fabric arranged above the rods of the upper tubes, placed on the other two opposite sides of the holder. 
     The bonding of the different mesh structures of the work is carried out by means of the rods installed in the lower tubes which support the first welded wire fabric, which connect the holders of the adjoining mesh surfaces. 
     Rods will be placed in the upper tubes parallel to the above tubes for the bonding of two adjacent holders which are close to the corners of two welded wire fabric surfaces. This upper linking together will prevent the raising of the mesh when a pressure goes or is applied outside of the central zone. 
     The object of the present invention is accomplished with a lid and a supporting base for the interior insulation in the pouring of the concrete. 
    
    
     
       DESCRIPTION OF THE DRAWINGS 
       To complement the description that is being provided and to aid in a better understanding of the features of the present invention, the present specification is accompanied by drawings showing the preferred embodiment, in which, in an illustrative and nonlimiting nature: 
         FIG. 1A  shows the left elevation;  FIG. 1B  shows the front elevation; and  FIG. 1C  shows the plan view of the holder that is the subject of the present invention; 
         FIG. 2  is a perspective view showing the positioning of eight holders in a first phase of the creation of the forging prior to the installation of the lower and upper woven wire mesh sections; 
         FIG. 3  is a perspective view showing the bonding of two adjoining sections of the first (lower) mesh of the forging with the surfaces of the two sections aligned in coplanar relation; 
         FIGS. 3A and 4A  are sectional views taken on the lines  3 A- 3 A and  4 A- 4 A of  FIG. 3 , showing the next step in the creation of the forging, when both the first (lower) and the second (upper) meshes are mounted on the holders; 
         FIG. 5  is a perspective view showing the creation of a modified embodiment of the forging, which uses rods in all of the eight tubes of the holder of the present invention; and 
         FIG. 5A  is a sectional view taken on the line  5 A- 5 A of  FIG. 5 . 
     
    
    
     PREFERRED EMBODIMENT OF THE INVENTION 
     Viewing the figures shown, it can be seen how the holder ( 6 ) for positioning floating slabs is composed of a metallic hollow cube having beveled ribs ( 6 ′) to mount the mechanical accessories used in the raising phase. The cube  6  is smaller in outride dimensions than the interstice of the grid of the mesh and has a height equal to that of the forging which forms the slab. The four sides of the holder have identical tubes ( 1 ,  1 ′,  2 ,  2 ,  3 ,  3 ′,  4 ,  4 ′), which are preferably attached to the holder  6  by means of welding. 
     The first (lower) mesh of the welded wire fabric ( 7 , 8 ) is situated above the rods ( 5 ) mounted in the lower tubes ( 1 ,  1 ′), according to  FIGS. 3 ,  3 A and  4 A. 
     As shown in  FIG. 3 , both sections (I and II) of the first mesh ( 7 , 8 ) of the structure of the welded wire fabric is situated above rods ( 5 ) which are inserted in the lower tubes ( 1  and  1 ′) shown in  FIG. 2 . As shown in  FIG. 3A , the adjoining sections (I and II) of the second mesh grid ( 13 ) are not interconnected prior to installation, and are situated above the rods ( 5 ) which are inserted in the lower tubes  2  and  2 ′. 
     To interconnect the adjoining mesh sections (I and II), the rods ( 5 ) will be inserted in the lower tubes of the holders ( 6 ) in both sections (I and II), spanning between and connecting both sections of the mesh structure. 
     The mesh is formed by longitudinal wires ( 8 ) and transverse wires ( 7 ), arranged some on top of others, and securing the bonding at the points of contact by welding. As shown in  FIG. 4A , the rods ( 5 ) in the lower tubes ( 1  and  1 ′) will be situated on the same plane and parallel to the lower wires ( 8 ) of the mesh, holding the longitudinal wires perpendicular to the transverse ones ( 7 ). 
     The separation between the lower tubes and upper tubes for positioning the mesh will be sufficient for the entry of the concrete, on the understanding that there may be little separation between the holders in the pouring which will put the consistency of the future floating slab at risk. 
     In the holders ( 6 ) belonging to two mesh sections that are located close to the corners, rods ( 5 ) will be inserted into the upper tubes ( 2 , 2 ′). As shown in  FIGS. 5 and 5A , additional rods  5  (not shown in  FIGS. 3 ,  3 A and  4 A) may be inserted in the tubes ( 3 ,  3 ′) on the same side as the lower tubes ( 5 , 5 ′), whose rods support the first mesh, and inserted in the two adjacent sections It will also be used for anchoring the structure and the mesh is not raised when exerting pressure in an opposite zone. In  FIG. 3  is only shown the first (lower) welded wire mesh ( 7 , 8 ),  FIGS. 3A and 3B  illustrate the second (upper) mesh ( 7 , 8 ) superimposed on the upper rods ( 5 ) in the manner that is described. 
       FIG. 3  shows two joined mesh sections (I, II) beginning at the joined corners, and it has to be understood that the sections (I, II) are not shown complete in the horizontal direction. 
     As shown in  FIGS. 5 and 5A , the other two tubes ( 4 , 4 ′) that are in the structure of the holder ( 6 ), arranged parallel to the upper tubes ( 2 . 2 ′) for the installation of the rods that support the second mesh and in a plane lower than those will be used for the installation of other additional rods when the slab has to support major loads. 
     The holder has a lid and a holder base coated with rustproof paint, and both are assembled by compression to avoid the entrance of the pourable concrete mix. As a complement, the lid is arranged sealed with silicone. The lid and holder base are painted different colors for quickly checking before pouring the concrete whether any of the holders are in the incorrect position. 
     When the concrete has set, the lids of the holders will be removed, and shock absorbers will then be placed which will make the raising of the slab possible. In this most suitable embodiment, another shock absorber, in this case, a high-frequency, silent-block-type shock absorber, will be placed on the bottom, which will facilitate the movement of the shock absorber arranged above same. 
     It should be understood that the present invention was described according to the preferred embodiment of same; therefore, it may be susceptible to modifications in shape, size and materials, provided that said changes do not substantially vary the features of the present invention as they are claimed below.