Complete set of elements fitting in unit-composed supporting systems
BACKGROUND OF THE INVENTION 
     The present invention relates to a complete set of elements fitting in unit-composed supporting systems, in particular to a set of elements arranged for housing and insulating wires, for instance electric and telephone wires, and suitable for unit-composed systems, fit to support and assemble working surfaces, archives shelves, partition panels, etc. These elements can be variously and widely used in the furnishings field in general and in the office furniture and rooms in particular. 
     It is known that in accordance with the more advanced job organization, a strong trend was marked toward a homogeneous and functional space distribution of work places. In fact, taking in due consideration a precise operative functionality, there is a trend toward the creation of collective work zones with strictly rational furnishings, where volumes and spaces can be continually adapted to ever new and changeable requirements. 
     So far the above mentioned standards are generally not carried out because of the comparatively slow process of adaptation and transformation of the furnishings industry which is usually, more responsive to aesthetic than to rational requirements. 
     To a large extent, supporting structures are in fact assembled by means of screw and bolts, thus preventing them from easy changes. Moreover these structures are composed of various and an indefinite number of different non-standard elements, which are specifically designed for a particular environment. At last, the known supporting system elements for office furniture, are not arranged for housing and insulating electric and telephone wires according to various and non-rectilinear directions. 
     SUMMARY OF THE INVENTION 
     It is an object of the present invention, in order to basically guarantee a flexible and functional organization of open space, to provide a minimum number of standard elements, whose repeated employment allows the highest furnishings combination, a quick and easy change of one combination into another and a partial transformation without alteration of the remaining parts, so that the enlargement or the reduction of a certain combination is not dependent on the combination itself. 
     Another object of the present invention is to provide a whole set of elements, fit for housing and insulating wires, as electric and telephone wires, and capable of assembly without screws or bolts in unit-composed systems, variously jointed, for supporting and assembling working surfaces, archives shelves, partition panels, etc. 
     The set of elements according to the present invention essentially comprises a vertical rod, provided with an axial slot passing therethrough, and having a plurality of slots at both upper and lower ends; a base with engagement means to be housed in one of the slots of the lower end of the vertical rod; a bar formed at least by two elements and provided at each of both ends with engagement means to be inserted in one slot of the upper end of the vertical rod; and a plate adapted to connect the bar with furnishings elements such as panels, resting surfaces, archives containers, shelves, etc. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The present invention will be now described more in detail with reference, only by way of a nonlimiting example, to a preferred embodiment illustrated in the annexed drawings, wherein: 
     FIG. 1 is a perspective view of a vertical rod of the set of elements according to a preferred embodiment of the present invention; 
     FIG. 2 is a perspective view of a base of the set of elements according to a preferred embodiment of the present invention; 
     FIG. 3 is a perspective view of a completely assembled supporting bar of the set of elements according to a preferred embodiment of the present invention; 
     FIG. 4 is a perspective partial view of the bar of FIG. 3 before the assemblage; 
     FIG. 5 is a sectional view of the central element of the bar of FIG. 3 along the line V--V; 
     FIG. 6 is an elevation view of a connecting plate included in the set of elements according to the present invention; 
     FIG. 7 is a perspective view of a connecting box suitable for a wire-housing; and 
     FIG. 8 illustrates an exploded view of an assembly according to the invention adjacent a furniture element. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     With reference to FIG. 1, a vertical rod 1 having a cylinder-shaped shank 2 and joints 3 and 4 at both ends, upper and lower at both sides of shank 2. The joint 3, as illustrated by FIG. 1, has a plurality of slots 6 along equally spaced generating lines of vertical rod 1. The slot shape is substantially the same as the one resulting from the longitudinal combination of a cylinder and a rectangular parallelepipedon. The cylindrical portion of each slot is marked with reference numeral 5. According to the illustrated embodiment, the slots 6 are radially spaced by a 45° interval, thus allowing the fixing of a bar 14 (FIG. 3) in accordance with anyone of the eight corresponding directions. The bar 14 is in fact stiffly connected to the vertical rod 1 by engaging its terminal element 20 into one of the eight slots 6. The terminal element 20 functions as an engagement means and comprises a parallelepipedon element 19&#39; and a cylindrical element 19 adapted to be fitted in the corresponding cylindrical portion 5 of the slot 6 of the joint 3. The vertical rod 1 is also provided with an axial slot passage 60 passing therethrough. 
     Analogously a plurality of equally spaced slots 7 (eight slots according to the illustrated embodiment) are formed on the joint 4 of the vertical rod 1, thus allowing the engagement of a terminal element 12 of the base 9 of FIG. 2. The slots 7 are provided, similarly to the above mentioned slots 6, with eight cylindrical portions 8 wherein, when assembled, the cylindrical terminal 11 of the base 9 is engaged. Furthermore the slots 7 are shaped in order to permit a quick disassembly of the base 9, being provided at their upper ends with a widening 7&#39; allowing the release of the cylindrical element 11 just by lifting the base 9 and drawing it out. The base 9 may be engaged in the opposite manner. FIG. 2 points out the simple structure of the base 9, which comprises a 10, having integral with the said element 12 with the cylindrical element 11. The element 12 is also characterized by a step, or a shoulder 13, as a guide for the joint 4 during the engagement and eventually as an auxiliary support of the shank 2 for the vertical rod 1. 
     The bar 14 in accordance with FIGS. 3-4-5 can house electric, telephone and other wires. According to the illustrated preferred embodiment the bar 14 comprises three elemental parts. Outer parts 25 and 26 act as a joint, whilst the central part 27 is load-bearing or supporting. As illustrated by FIG. 4, showing in a perspective view a part of the supporting section 27 and one of two side joints (for instance the joint 26), the bar 14 is provided with two inner passages 28 and 29 suitable for wire-housing. More precisely, as FIG. 5 shows in a sectional view, the central part 27 of the bar 14 is composed by one H beam 30 and two opposite channels 31 and 32. The webs of channels 31 and 32 are parallel to H beam&#39;s one. The inner passages 28 and 29 are created by the webs of two channels 31 and 32 and the web of the H beam 40 together with its platbands. Each one of the two joints 25 and 26 is provided with a terminal 20, which, as above mentioned, can be housed in one of the eight slots 6 formed in the joint 3 of the vertical rod 1. 
     Opposite to the terminal 20, each one of the two joints 25 and 26 is provided with two protruding hollow couplings 33 and 34, substantially composed by two rectangular parallelepipedons suitable to be tightly housed in the passages 28 and 29. Moreover the part 27 of the bar 14 presents a slot 17 on both sides which can house, when assembled, the connecting plate 21. 
     According to the embodiment illustrated in FIGS. 6 and 8, the connecting plate 21 is substantially formed by a rectangle element with two opposite beveled corners 23 and 24, and with a central quadrangular hole 22. When assembled, the plate 21 is just the connecting element between whatsoever working surface or panel (where it is fixed by means of the hole 22) and the bar 14. That is, the plate 21 serves of itself to mount the central part 27 of a bar 14 directly to a furniture element A or panel. Thus, the plate 21 has the function of a clamping means for fastening a furniture element on the bar 14. The plate 21 is made integral with the element A via a screw or bolt 35 in the hole 22 in the plate 21 and a suitable threaded aperture 36 in the furniture element A while being inserted in one of the side slots 17 of the central part 27. The connecting plate 21 length d is equal to the width of the platbands 41 and 42 of the H beam 30, in order to be clamped, when assembled, between the webs of channels 31 and 32, which come into contact with both shorter sides. 
     FIGS. 3 and 4 point also out slots 17&#39; of joints 25 and 26 opposite to the slots 17 of the central part 27 of the bar 14. The bar 14 not only can house wires inside the passages 28 and 29, but can also separate them, for instance telephone from electric wires, by means of the web 40 of the H beam 30. Obviously the bar 14 can be provided inside the passages 28 and 29 with an insulating layer, easily made by extrusion during the production of the bar itself. Moreover the vertical rod 1 can also house telephone and electric wires in the axial slot 60. The complete set of elements fitting in unit-composed supporting systems according to the present invention can therefore wholly embody the wires of a electric and telephone system. The wires can be passed from the vertical rod 1 to the bar 14 both through a hole 43 (shown in phantom in FIG. 4) opposite to the cylindrical element 19 of the joints 25 and 26 and preferably through a hole 44 (shown in phantom in FIG. 1) to be made on the vertical rod 1 just below the joint 3, and then through a connecting box, for instance like box 70 of FIG. 7, suitable for wire-housing and fitted inside with a partition screen 71 to separate wires. When assembled, this box 70 connects the upper part of the vertical rod 1 with the bar 14. 
     It is important to point out that the fitting elements in accordance with the present invention, allow the electrification of widely jointed structures, thus remarkably improving safety, praticalness and aesthetics. 
     It will be also noticed that the described elements can have a wide range of applications different to the above mentioned ones, as for instance the assembly of partition walls or bank agency counters, and so on. 
     Although the present invention has been described in detail with reference to the annexed drawings and to a particularly preferred embodiment, it is obvious that adaptations and/or modifications can be brought by those skilled in the art without departing from the scope of the invention itself.