EP3106584A1 - An improved step for treadable grating - Google Patents
An improved step for treadable grating Download PDFInfo
- Publication number
- EP3106584A1 EP3106584A1 EP16174241.6A EP16174241A EP3106584A1 EP 3106584 A1 EP3106584 A1 EP 3106584A1 EP 16174241 A EP16174241 A EP 16174241A EP 3106584 A1 EP3106584 A1 EP 3106584A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grating
- stair tread
- bars
- bands
- end plates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001362 anti-vertigo Effects 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 6
- 230000002787 reinforcement Effects 0.000 claims abstract description 5
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/104—Treads
- E04F11/112—Treads of metal or with an upper layer of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/42—Gratings; Grid-like panels
- E04C2/421—Gratings; Grid-like panels made of bar-like elements, e.g. bars discontinuous in one direction
- E04C2/422—Gratings; Grid-like panels made of bar-like elements, e.g. bars discontinuous in one direction with continuous bars connecting at crossing points of the grid pattern
- E04C2/423—Gratings; Grid-like panels made of bar-like elements, e.g. bars discontinuous in one direction with continuous bars connecting at crossing points of the grid pattern with notches
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/104—Treads
- E04F2011/1046—Miscellaneous features of treads not otherwise provided for
Definitions
- the present invention relates to the sector of metal staircases provided with treadable-grating surfaces, permeable to air and light.
- the weight of grating surfaces to be laid in situ, including steps, is one of the main aspects that involve great resources both from the commercial standpoint (for quantifying the costs when drawing up the bid) and from the technical standpoint (when drawing up the detailed design).
- anti-vertigo function which constitutes an important element for marketability of the product.
- a first purpose of the present invention is to reduce the weight of each step, at the same time enabling wide operating spans.
- a second purpose of the invention is to guarantee an anti-vertigo function that would not otherwise be possible with grating steps of a conventional type.
- the inventive idea underlying the present invention basically consists in providing a functional and structural co-operation between a step of a standard type and reinforcement elements of various types that can be inserted underneath the treading surface of the step itself.
- the steps of a conventional type that are shown in the (non-limiting) example of embodiment referred to in the present description have a mesh with bars having a cross section smaller than the one specified in the load tables: in fact, according to the present invention, the required strength is obtained thanks to insertion of elements underneath the step to achieve the desired load-bearing capacity, at the same time providing a product having a lower weight as compared to products so far known.
- the standard step ( Figure 1A ) is constituted by a grating that may be of various types (e.g., 15-76/30-3) and is basically made up of:
- the step shown in Figure 2 presents a considerably lower weight than steps of a traditional type that are designed to withstand the same load, and at the same time creates an anti-vertigo function by means of the underlying sectional elements.
- a variant of the step forming the subject of the present invention ( Figure 4 ) has a more marked and specific anti-vertigo function, in so far as it envisages the use, once again on the underside of the grating of the step itself, of an obscuring panel with inclined bars 2'.
- the inclined bars 2' have an inclination and are set at a distance from one another such as to prevent the user from seeing through the grating of the steps, eliminating the possibility of the user realizing the height reached when he is looking where he puts his feet.
- the distance of the inclined bars 2' from the grating is a function of the necessary load-bearing capacity, and the inclined bars 2' are rendered fixed with respect to the end plates 5 (adequately enlarged) and structurally participating by means of one or more bands 3 made of sheet metal arranged orthogonal thereto and to the treading surface.
- one of these bands 3 is shown with a perimeter identified by a dashed line.
- said bands 3 be provided with appropriate shaped notches or slots 6 designed to mate with the boundaries of the cross section of the sectional elements 2 described previously ( Figures 3 and 5 ).
- a further peculiar characteristic of the invention lies in the fact that said bands 3 are fixed to the end plates 5 at their ends, whereas they are fixed to the sectional elements 2, 2' at the edges of the shaped slots or notches 6.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Sewage (AREA)
- Steps, Ramps, And Handrails (AREA)
Abstract
Description
- The present invention relates to the sector of metal staircases provided with treadable-grating surfaces, permeable to air and light.
- The weight of grating surfaces to be laid in situ, including steps, is one of the main aspects that involve great resources both from the commercial standpoint (for quantifying the costs when drawing up the bid) and from the technical standpoint (when drawing up the detailed design).
- Another important aspect is the anti-vertigo function, which constitutes an important element for marketability of the product.
- Consequently, a first purpose of the present invention is to reduce the weight of each step, at the same time enabling wide operating spans.
- A second purpose of the invention is to guarantee an anti-vertigo function that would not otherwise be possible with grating steps of a conventional type.
- A better understanding of the invention will be obtained from the ensuing detailed description and with reference to the attached drawings, which illustrate, purely by way of non-limiting example, some preferred embodiments of the invention.
- In the drawings:
-
Figures 1A and 1B regard a step of a currently known type; -
Figure 2 is a cross-sectional view of a step according to a preferred embodiment of the invention; -
Figure 3 shows a constructional detail of one of the transverse reinforcement bands of the step ofFigure 2 ; -
Figure 4 , which is similar toFigure 2 , shows a variant with anti-vertigo function; and -
Figure 5 , which is similar toFigure 3 , shows a constructional detail of one of the transverse reinforcement bands of the anti-vertigo step ofFigure 4 . - The inventive idea underlying the present invention basically consists in providing a functional and structural co-operation between a step of a standard type and reinforcement elements of various types that can be inserted underneath the treading surface of the step itself.
- With reference to
Figures 1A and 1B , it should be pointed out that the steps of a conventional type that are shown in the (non-limiting) example of embodiment referred to in the present description have a mesh with bars having a cross section smaller than the one specified in the load tables: in fact, according to the present invention, the required strength is obtained thanks to insertion of elements underneath the step to achieve the desired load-bearing capacity, at the same time providing a product having a lower weight as compared to products so far known. - The standard step (
Figure 1A ) is constituted by a grating that may be of various types (e.g., 15-76/30-3) and is basically made up of: - the
grating stair tread 1 having a length suitable for the width of the staircase; - a visual-barrier sectional element set on one of the two long sides of the step (downstream side);
- two
end plates 5, which are set at the ends for attachment of the step to the outer stringers of the staircase (normally having a thickness of 3 mm) and welded on which are the bars of the grating; these end plates are provided with a hole and a slot (which are both designated by the reference 4) for fixing to the stringers. - According to the invention (
Figure 2 ), it is envisaged to provide a step with a greater inertia by integrating, in the bottom part of the grating, press-bent L-shaped sectional elements 2 (represented in cross-sectional view hatched), which are rendered fixed to the end plates 5 - which are adequately enlarged - as well as structurally participating by means of one ormore bands 3 made of sheet metal set orthogonal thereto and to the treading surface. InFigure 3 one ofsaid bands 3 is shown with its perimeter represented with a dashed line. - Given the same load-bearing capacity, the step shown in
Figure 2 presents a considerably lower weight than steps of a traditional type that are designed to withstand the same load, and at the same time creates an anti-vertigo function by means of the underlying sectional elements. - A variant of the step forming the subject of the present invention (
Figure 4 ) has a more marked and specific anti-vertigo function, in so far as it envisages the use, once again on the underside of the grating of the step itself, of an obscuring panel with inclined bars 2'. - In particular, the inclined bars 2' have an inclination and are set at a distance from one another such as to prevent the user from seeing through the grating of the steps, eliminating the possibility of the user realizing the height reached when he is looking where he puts his feet.
- In addition, the distance of the inclined bars 2' from the grating is a function of the necessary load-bearing capacity, and the inclined bars 2' are rendered fixed with respect to the end plates 5 (adequately enlarged) and structurally participating by means of one or
more bands 3 made of sheet metal arranged orthogonal thereto and to the treading surface. InFigure 5 one of thesebands 3 is shown with a perimeter identified by a dashed line. - According to a peculiar characteristic of the invention, it is envisaged that said
bands 3 be provided with appropriate shaped notches orslots 6 designed to mate with the boundaries of the cross section of thesectional elements 2 described previously (Figures 3 and 5 ). - A further peculiar characteristic of the invention lies in the fact that said
bands 3 are fixed to theend plates 5 at their ends, whereas they are fixed to thesectional elements 2, 2' at the edges of the shaped slots ornotches 6. - The present invention has been described and illustrated in a preferred embodiment and some variants thereof, but it is evident that technically equivalent modifications and/or replacements may be made by any person skilled in the branch, without thereby departing from the sphere of protection of the claims of the present industrial patent right.
Claims (6)
- An improved step for treadable-grating staircases, of the type comprising: a grating stair tread (1) having a length suitable for the width of the staircase, as well as at least two end plates (5) for attachment of the step to the outer stringers of the staircase welded on which are the bars of the grating, said step being characterized in that to obtain a functional and structural co-operation between said stair tread (1) and reinforcement elements that are provided underneath the treading surface of the step itself, it envisages that integrated on the underside of the stair tread (1) are L-shaped sectional elements (2) that are rendered fixed to the end plates (5), as well as structurally participating by means of one or more bands (3) made of sheet metal arranged orthogonal thereto and to the treading surface, and in that , for implementing an anti-vertigo function, as an alternative to said L-shaped sectional elements (2), it envisages an obscuring panel with inclined bars (2'), which is appropriately arranged on the underside of the grating of the step itself.
- The step according to preceding claim, characterized in that said inclined bars (2') have an inclination and are set at a distance from one another such as to prevent the user from seeing through the grating of the steps, thus eliminating the possibility of the user realizing the height reached when he is looking where he puts his feet.
- The step according to Claim 1, characterized in that the distance of the inclined bars (2') from the stair tread (1) is a function of the necessary load-bearing capacity and of the fact that the inclined bars (2, 2') are rendered fixed with respect to the end plates (5) and structurally participating by means of one or more bands (3) made of sheet metal arranged orthogonal thereto and to the treading surface.
- The step according to Claim 1, characterized in that said bands (3) are provided with appropriate shaped notches or slots (6) designed to mate with the contours of the cross section of the sectional elements (2, 2') to which they are constrained.
- The step according to preceding claim, characterized in that said bands (3) are fixed to the plates (5) at their ends, and are moreover fixed to the sectional elements (2, 2') at the edges of the shaped slots or notches (6).
- The step according to any one of the preceding claims, characterized in that said stair tread (1) has a mesh with bars of a cross section smaller than what is specified in the grating load tables; it being envisaged that the required strength is obtained thanks to the insertion of structural elements underneath the stair tread (1) of the step to reach the desired load-bearing capacity, thus obtaining, given the same weight that it can withstand, a product with lower weight as compared to known products.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITUB20151524 | 2015-06-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3106584A1 true EP3106584A1 (en) | 2016-12-21 |
EP3106584B1 EP3106584B1 (en) | 2022-04-20 |
Family
ID=54199964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16174241.6A Active EP3106584B1 (en) | 2015-06-19 | 2016-06-13 | An improved step for treadable grating |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP3106584B1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1978791U (en) * | 1967-10-07 | 1968-02-15 | Lichtgitter Gmbh | GRATING. |
DE2732593A1 (en) * | 1977-07-19 | 1979-02-01 | Baecker Josef Fa | Landing or stair grating with sight screening bars - has deep longitudinal bars with their lower halves inclined to vertical |
DE10033530A1 (en) * | 2000-07-11 | 2002-01-31 | Heifa Kamin Und Korrosionsschu | Plug-up structural system of cross-linked beams uses angle profiles as beams to form parallelograms from facing leg sides all linked by transverse connectors. |
ES2317740A1 (en) * | 2005-06-15 | 2009-04-16 | Orsogril S.P.A. | Grid with visual screening, particularly, for transitable surfaces in high position. (Machine-translation by Google Translate, not legally binding) |
EP2698483A1 (en) * | 2012-08-13 | 2014-02-19 | Italiana Keller Grigiati Soc. Coop. a R.L. | Improved lightweight high-strenght sectional element, in particular for treadable gratings |
-
2016
- 2016-06-13 EP EP16174241.6A patent/EP3106584B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1978791U (en) * | 1967-10-07 | 1968-02-15 | Lichtgitter Gmbh | GRATING. |
DE2732593A1 (en) * | 1977-07-19 | 1979-02-01 | Baecker Josef Fa | Landing or stair grating with sight screening bars - has deep longitudinal bars with their lower halves inclined to vertical |
DE10033530A1 (en) * | 2000-07-11 | 2002-01-31 | Heifa Kamin Und Korrosionsschu | Plug-up structural system of cross-linked beams uses angle profiles as beams to form parallelograms from facing leg sides all linked by transverse connectors. |
ES2317740A1 (en) * | 2005-06-15 | 2009-04-16 | Orsogril S.P.A. | Grid with visual screening, particularly, for transitable surfaces in high position. (Machine-translation by Google Translate, not legally binding) |
EP2698483A1 (en) * | 2012-08-13 | 2014-02-19 | Italiana Keller Grigiati Soc. Coop. a R.L. | Improved lightweight high-strenght sectional element, in particular for treadable gratings |
Also Published As
Publication number | Publication date |
---|---|
EP3106584B1 (en) | 2022-04-20 |
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