| WO2008090462A1 | 2008-07-31 |
| DE3505688A1 | 1986-08-21 | |||
| EP0060014A1 | 1982-09-15 | |||
| FR2406046A1 | 1979-05-11 | |||
| EP0942144A2 | 1999-09-15 |
| CLAIMS: 1 - Two-side fascia self-bearing modular structure characterised in that each rise is composed by two modules. Said module is manufactured from a sheet metal or an extruded metal if derived from an alloy (of the aluminium type) . It is L-shape of equal thickness with the essential characteristic that the shape (TABLE 5, Fig. E) , made necessary to define the L, determines the displacement of the median axis by thus outlining two parts joined in different planes and therefore not coplanar between the two faces (TABLES 3 and 4) . This configuration, once assembled, with special pins-key (TABLE 3, Fig. B) retractable between the modules, creates a vertical plane (rise) and a horizontal plane (tread) on which the step will then be inserted. The particularity of said module is precisely the presence of the pins-key (TABLE 3, Fig. B) inserted in the inner part of the module that joined to the slot located in the outer upper part of the next module makes the structure adjustable in both directions, the whole locked by fastening screws and washers in the inner part. The structure is thus without any fastenings in full view on the outer side and therefore aesthetically "clean". 2 - Structure according to the preceding claims, characterised in that the folding is made towards the inner and in the upper part of the lateral side (TABLE 5) . 3 - Structure according to claim 2, characterised in that the upper part of the lateral side is coupled with the lower part of the next lateral side (TABLE 2). - Structure according to the preceding claims, characterised in that on the outer upper part are located the non-through precision slots for the adjustment of the characteristic parameters (riser and tread) (TABLE 4). - Structure according to claim 4, characterised in that on the inner bottom part of the lateral side are located the non-through holes, for adjustment according to the regulations in force, of the structure thereof (TABLE 3) . - Structure according to claim 1, characterised in that the pins- keys are in Steel (TABLES 3 and 4 B) . - Structure according to claim 1, characterised in that the washers are in Steel (TABLES 3 and 4 C) . - Structure according to claim 1, characterised in that the fastening screws are in Steel (TABLES 3 and 4 D) . - Structure according to claims 1, 4 and 6, characterised in that the pins-keys are applied in two non-through holes on the inner lower part of the lateral side and coupled with the relating precision slots on the outer upper part of the next lateral side (TABLES 3 and 4). - Structure according to claims 1, 5 and 6, characterised in that the fastening screw is applied in the inner part of the lateral side and with the washer locking the two lateral sides together in the oval hole (TABLE 3). |
STRINGER MODULE FOR SELF-SUPPORTING STAIRS
A. Preamble:
The present invention relates to the field of modular prefabricated stairs for indoor and outdoor use. The above solution envisages the adjustment of its characteristic parameters according to the regulations of the industry.
B. Existing solutions:
The reference field has a wide variety of solutions that can be summarised in two distinct categories:
• the customised structures; · the modular structures.
The customised structures have several advantages including that of being created specifically for every environment. It is also true that these types of stairs consist of pieces of considerable size and weight, manufactured in the workshop, resulting of difficult transportation, both from the workshop to the place of assembly, and within the installation location thereof (for example, assembly in the upper floors of a condominium building) . Moreover, it can easily be imagined that in most cases this type of structures has not been subjected to analysis of capacity or any other engineering calculation in order to be able to state that the stairs meets the regulations in force. In addition, the time for manufacturing this stairs is long and the resulting cost is higher compared to a modular structure. It can therefore be stated that the customised stairs is good looking, but of difficult handling and high costs. The modular structure is submitted to the market exactly for avoiding the limitations of the customised structure, mainly against the inconvenience in transportation and the high cost. The solutions currently in the market of modular structures differ from those non- adjustable and those adjustable. The first has the adjustment limit that cannot be carried out. The pieces must be modified in most cases during assembly and this lengthens installation time besides increasing the cost of a structure which in the first place appears convenient. The second is adjustable, but in most cases only in one of the two directions: either height, or length. The possibility of adjustment is to the detriment of aesthetics of the structure which has a considerable number of pieces, mostly in full view (screws, spacers, etc. ) .
In particular, the invention is represented in the following Figures: TABLE 1: VIEW OF LAY-OUT
TABLE 2: EXAMPLE OF COUPLED MODULES
TABLE 3: EXPLODED INNER VIEW
A: LATERAL SIDE B : PIN-KEY
C: WASHER D: FASTENING SCREW
TABLE : EXPLODED OUTER VIEW
TABLE 5: MODULE
E: SECTION The structure, object of the patent (TABLE 1), consists of a modular stairs, adjustable, with two side fascias.
The possibilities of adjusting the stairs are in both directions, both in height and in length, maintaining in all cases compliance with the regulations in force. The module is manufactured by folding a metal sheet which allows, thanks to the adopted shape after processing, the exact alignment of the entire structure. The characteristic part of the invention is the assembly of the two modules that make up the load-bearing part of the structure.
The height (or rise) is determined by the positioning of pins-keys inserted in the lower part of the module, inner side (TABLE 3) . The length (or tread) is determined by the coupling of the above- mentioned pins-keys with the special precision slots located in the upper part, outer side, of the next module (TABLE 4).
These characteristic parameters of any whatsoever structure can vary due to the different available positions.
What distinguishes this modular stairs is the clean aesthetics thanks to absence on the outer side of bolts and screws and various components, and above all, use of few components for its manufacture.
ASSEMBLY
The fundamental innovation is the simplicity of assembly of the details. In fact, as shown in TABLE 3 and TABLE 4, assembly between two modules is carried out in just three simple steps:
1. Fastening of two pins-keys in the lower inner part of the
first module.
2. Coupling of the pin-key part that protrudes from the first lateral side, with the precision slots that are located in the upper outer part of the second module.
3. Locking of the two modules by closing with fastening screw and washer in the pre-set oval hole.