ES2235674B1 - COMPENSATED STAIRCASE OF MODULAR ROLLS. - Google Patents

Abstract

Compensated ladder of modular steps. It comprises a plurality of identical rungs formed by a flat rhombic zone, an angular triangular back, a vertical cylindrical column and an L-shaped bottom support, with reinforcing side flaps. The steps are coupled by screws and by overlapping their vertical columns and the L-shaped supports, with angular deviations between each pair of determined steps, in the curvilinear areas of the staircase, by diametral recesses and projections in the overlapping areas.

Description

Compensated ladder of modular steps.

Object of the invention

The present invention relates to a ladder offset of modular steps.

Field of the Invention

It is that of the manufacturing industry of building materials, particularly stairs functional and ornamental, in interior enclosures and outside

Background of the invention

Various types of stairs are known constituted based on modular elements, especially stairs of snail and other configurations, consisting of multiple rungs practically equal to each other and associated with an upright central or similar support element.

These known types of stairs result normally expensive due to the need, particularly in cases of circular or curvilinear plants, of adapting each step to a different position with respect to the sustaining element central, apart from that its construction demands a considerable amount of labor.

The design of a new one was necessary ladder exempt from the aforementioned inconveniences and that could be built at a reasonable price and in a short time.

Brief Description of the Invention

The ladder to be described is built exclusively based on the steps that constitute it, coupled each other without the need for other bearing elements (although optionally it can be complemented with other components, such as one or more central columns, and outer railings and interiors).

The steps are advantageously made of cast iron based on an aluminum alloy and, once mounted firmly in functional position, different plates are placed finishes, thus forming the footprint of the steps. These plates they will be made of wood or a suitable material, non-slip and of aesthetic properties

To facilitate the explanation, the present description of some drawings in which it has been represented, by way of illustrative and non-limiting example, a case of realization of a staircase of modular steps, according to the principles of the claims.

Brief description of the drawings

Figures 1 to 4 are exterior dihedral views of one of the modular steps of the new staircase, and figure 5 a longitudinal section thereof by an indicated plane A-A

Figure 6 shows the way they are coupled two adjacent steps for the organization of the new stairs.

Figure 7 shows an example of a ladder built according to this patent and that has a plant in the form of U, based on equivalent steps and which, in the part curvilinear, they present the particularity that will be explained and that indicated in the detail of figure 8.

Detailed description of the invention

The offset rating applied to the new construction refers to the fact that, in the case of stairs of snail and others, whose plant has curvilinear forms, the successive steps occupy angularly displaced positions about of others, thus compensating the variations of direction of a virtual tangent that enveloped the stair floor in question.

This way you can build stairs of snail of circular plant, of U-shaped plant or of plant with  other forms that include curvilinear sections.

Each of the steps described it comprises a flat area 1 generally approximately rhomboidal, with a convex angle 2, two flanks 3 and 4 of reduced length, two sides 5 and 6 converging and an extreme zone rectangular 7 with its semicircular end 8.

The part of the step corresponding to side 2 is prolongs inferiorly in the cylindrical column 9, provided with a upper axial bore 10 and lower axial bore eleven.

The part of the rung corresponding to the end 8 is extended in the cylindrical zone 12, centrally provided with an axial perforation in which an inner threaded tubular insert 13 is housed.
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The triangular and parallel elements 14 and 15 relate parts 9 and 12, reinforcing the structure of the step, and define a space 16 between them.

The lateral faces 17, perpendicular to the plane of face 1, follow the angular shape of side 2 of said face and it has, the triangular shapes that are seen in figure 2.

Figure 6 shows the way they are coupled two adjacent steps of the new staircase. Column 9 of upper step overlaps part 12 of the lower step, the stem 18 of head 19 and threaded end 20 is inserted into the perforations 10 and 11 and it is screwed firmly into the insert 13.

The design of the step and the properties of the material with which it is made (advantageously, cast aluminum) ensure a great robustness of the
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When there are curvilinear sections in the new staircase, the steps are successively angularly offset from each other in order to adapt to the configuration of the structure, as can be seen in the scheme in Figure 7. To do this, the underside of the column 9 has a diametral projection 21 of angular or rectangular section, and the upper face of part 12 has a diametral recess 22 of the same sectional shape and intended to be introduced into that entrance.
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The outgoing 21 and the incoming 22 are oriented properly, for the calculated position of each pair of steps contiguous, according to the staircase plan project, as look at the scheme in figure 7.

Obviously, projection 21 could also be in part 12 and inlet 22 in column 9.

The variation of the orientation of the projection 21 and incoming 22 does not imply any difficulty in building The steps of the new staircase. Indeed, after performing the casting of the steps, all of them equal to each other to the mold output, just mechanize them, defining the protrusions and the starters with the necessary angular positions, according to the orientations foreseen in the project.

The staircase is completed with the incorporation, in each step, of a wooden plate or equivalent material (not represented in the drawings), of functional properties and Aesthetic aesthetics, of dimensions according to interest for the correct development, plate that will be conveniently fastened by screws inserted into threaded holes 23 and 24.

Claims (4)

1. Compensated staircase of modular steps, formed by the superposition of steps of equivalent shapes and dimensions and with appropriate orientations to the curved areas of the structure, characterized in that each of the steps has a flat area (1) in general approximately rhombic shape with a rounded vertex (2) and concurrent sides (5, 6) in a semicircular zone (8), deriving from the vertex (2) a cylindrical column (9) axially perforated and from the area (8) a bearing block (12) of an internally threaded tubular insert (13). 2. Offset ladder of modular steps, according to claim 1, characterized in that each of the steps comprises two triangular faces (17) of lateral reinforcement, perpendicular to the flat face (1), and two triangular and parallel flaps (14, 15) bottom reinforcement. 3. Offset ladder of modular steps, according to claims 1 and 2, characterized in that the coupling between each pair of adjacent steps is made by superimposing the foot of the column (9) of a step on the upper face of the block (12) of the bottom step, and by inserting a bolt (18) into the perforation (10, 11) of the first and its threading into the insert (13) of the second. 4. Offset ladder of modular steps, according to claims 1 to 3, characterized in that the coupling between two adjacent steps belonging to a curvilinear section is secured by the provision of a diametral projection (21) on the underside of the column (9) in conjunction with a diametral recess (22) on the upper face of the block (12), said projection and recess (21, 22) being located in correspondence with the orientation established in the structure design.