EA030860B1 - Telescopic design of stair stringer - Google Patents

Abstract

The proposed invention is related to the field of construction, in particular, to modular-type stairs design, and can be used for indoor or outdoor interfloor connection in any ready apertures retaining horizontal positions of steps. A telescopic design of a stair stringer including main fixing elements and angular elements, wherein the length of vertical parts of angular elements defining the height of the stair steps is shorter than the length of their horizontal parts defining the width of stair steps, includes also additional fixing elements, and the stair stringer is made of a set of angular elements designed for changing the height and length of the vertical and horizontal parts of the stair stringer structure, respectively. Each of angular elements of the stair stringer consists of at least two plates contact surfaces of which are made mutually corrugated; the plates are mounted so that they can be moved and fixed relative to each other, and corrugated surfaces of at least two plates of the angular elements serve as additional fixing elements and are fastened to each other by main fixing elements. Further, angular elements of the stair stringer are L-shaped, and corrugation directions of contact surfaces in at least two plates of angle elements are mutually opposite to each other. Corrugation of contact surfaces of at least two plates of the stair string angular elements is toothed, and a tooth pitch and/or corrugation pitch of at least two plates of the stair string angular elements is from 0.5 to 10 mm. Main fixing elements generally comprise metal hardware in the form of fasteners, and the stair string itself is made so that the stair steps can be attached to a platform mounted on a horizontal part of the stair stringer angular element inner plate surface that does not contact the outer plate.

Description

DESCRIPTION OF THE INVENTION TO THE EURASIAN PATENT (45) Date of publication and issuance of the patent

2018.10.31 (21) Application Number

201600663 (22) Date of application

2016.08.15 (51) Int. Cl. E04F11 / 06 (2006.01)

E06C1 / 12 (2006.01) (54) TELESCOPIC CONSTRUCTION TESTA LADDERS (43) 2018.02.28 (56) (96) 2016 / ЕА / 0061 (BY) 2016.08.15 (71) (72) (73) Applicant, inventor and patent holder :

LIKOV IGOR

RU-U1-140259

GB-A-1141007

WQ-A1-2008090462

ALEKSANDROVICH (BY) (74) Representative:

Klimbovskaya Yu.A. (BY)

030860 Bl (57) The present invention relates to the field of construction, in particular to the construction of modular ladders, and can be used for interfloor connections inside and outside the room in any ready-made openings while maintaining the horizontal position of the steps. The telescopic design of the bowstring includes the main fixing and corner elements, in which the length of the vertical parts of the corner elements defining the height of the steps of the stairs is less than the length of their horizontal parts determining the width of the steps also includes additional fixing elements, and the bowstring is made of a set of corner elements designed to change the height and length of the vertical and horizontal parts of the construction of the bowstring ladder, respectively. Moreover, each of the corner elements of the string of a ladder consists of at least two plates, the contact surfaces of which are mutually corrugated, while the plates are mounted so that they can move and fix relative to each other, and the corrugated surfaces of at least two plates of corner elements serve as additional locking elements and fastened together by the main locking elements. In addition, the corner elements of the bowstring of the staircase are L-shaped, and the directions of corrugation of the contact surfaces of at least two plates of the corner elements of the bowstring of the staircase are mutually opposite to each other. At the same time, the grooves of the contact surfaces of at least two plates of the corner elements of the bowstring of the ladder are serrated, while the notched pitch and / or pitch of the corrugations of at least two plates of the corner elements of the ladder's bowstring is from 0.5 to 10 mm. The main fixing elements, as a rule, are fasteners made in the form of hardware, and the bowstring itself is made with the possibility of attaching the steps of the staircase to a platform installed on the horizontal part of the non-contact surface with the outer plate of the inner plate of the corner elements of the bowstring.

030860 B1

The present invention relates to the field of construction, in particular to the structures of modular ladders, and can be used for interfloor connections inside and outside the premises in any ready-made openings while maintaining the horizontal position of the steps at any angle of the staircase.

Known folding stairs, which contains two sections, articulated between themselves steps. An adjustable strap is installed at one of the ends of the sections, equipped with a number of radial holes with the help of which an adjustable strap pivotally connects the opposite ends of the sections. In one of the sections, the adjustable bar can be fixed with a lock washer, and shifting the radial holes of the adjustable bar allows changing the height of the staircase.

The advantage of the proposed folding ladder is the simplicity of its design and that. that the parallelogram rule is inherent in the mentioned construction; the opposite sides of the parallelogram are always parallel, and this allows changing the distance between the working platform and the ground level without changing the angle of inclination of the steps inwards.

Also known is the design of the ladder, which includes at least one string, made in the form of a C-shaped metal profile, inside of which is placed with the possibility of longitudinal movement of the cracker in the form of a metal plate with a threaded hole coinciding with the longitudinal groove of the string.

The bowstring is outside covered with a U-shaped bracket, fitted at the ends with two coaxial holes and an elongated groove on one cheek. The fork-shaped arm with its rear end, provided with a transverse hole and an elongated groove, abuts the bracket on the side of its elongated groove.

A mounting bolt is inserted into the hole of the rear end of the bracket, the threaded end of which passes through the elongated slot of the bracket, the longitudinal groove of the string and enters the threaded hole of the biscuit. Another fastening bolt passes through the elongated groove of the rear end of the bracket, coaxial holes at the ends of the bracket and is provided with a nut on the threaded end.

The transverse part and the front ends of the bracket are equipped with tread fasteners. Between the two adjacent vertical steps installed and attached support rods, made with the possibility of adjusting their height.

For fastening to the wall and floor, the staircase is equipped with support brackets.

In this case, the string can be made composite, i.e. An additional part is attached to its main part with a biscuit inserted into one of them, into which a bolt is screwed in, tightening the two parts of the string together.

The closest to the proposed invention to the technical essence of the solution is the modular design of the stair tread, in which the module consisting of a Z-shaped corner element and a connecting element is made of hollow tubes of rectangular section, and the connecting element movably connects the Z-shaped corner elements.

Such a connection is carried out by inserting the above-mentioned element into the joined cavities of their vertical parts, while the length of the vertical parts of the angle element determining the height of the step is less than the length of the horizontal part of the corner element determining the width of the step on which the step web is attached. the vertical sections of the corner element are made of seats for fastening and fixing.

However, the known designs of the stairs do not allow dynamically changing the dimensions of the carrying string of the ladder, changing the angle of inclination of the whole ladder, as well as changing its length and height.

The task of the invention is to eliminate the aforementioned disadvantages, namely to create such a telescopic design of the bowstring of the ladder, thanks to which it is possible to dynamically change the dimensions of the carrying bowstring of the ladder, i.e. change the size of its vertical and horizontal sections;

change the angle of inclination of the staircase, while maintaining strict parallelism of the steps relative to the supporting surface and relative to each other;

change the length and height of the stairs;

to install the ladder in the openings of rooms having any size.

The problem is solved by the fact that the telescopic design of the bowstring of the stairs, including the main fixing and corner elements, in which the length of the vertical parts of the corner elements defining the height of the steps of the stairs is less than the length of their horizontal parts determining the width of the steps, includes additional fixing elements, and the bowstring of the stairs is made from a set of corner elements designed to change the height and length of the vertical and horizontal parts of the construction of the bowstring ladder, respectively, and One of the corner elements of the string of a ladder consists of at least two plates, the contact surfaces of which are mutually grooved, while the plates are mounted so that they can move and fix relative to each other, and the corrugated surfaces of at least two plates of corner elements serve as additional locking elements and are fastened among themselves the main fixing

- 1,030,860 items.

In addition, the corner elements of the bowstring of the staircase are L-shaped, and the directions of corrugation of the contact surfaces of at least two plates of the corner elements of the bowstring of the staircase are mutually opposite to each other.

At the same time, the grooves of the contact surfaces of at least two plates of the corner elements of the bowstring of the ladder are serrated, while the notched pitch and / or pitch of the corrugations of at least two plates of the corner elements of the ladder's bowstring is from 0.5 to 10 mm.

The main locking elements are fasteners made in the form of hardware, such as bolts, nuts, rivets, screws, screws, etc., and the bowstring itself is made with the possibility of mounting the steps of the stairs to the horizontal part of its corner elements.

The inventive telescopic design of the bowstring of the stairs is illustrated by the submitted drawings (Fig. 1, 2, 3).

FIG. 1 shows a general view of the telescopic construction of a ladder string consisting of corner elements 1 having an L-shape and made of a set of such elements. Moreover, in FIG. 1 shows the corner element 1 of the bowstring of the ladder in the shifted position (pos. A) and the corner element 1 in the extended position (pos. B).

FIG. 2 shows the elements of the bowstring of the staircase in disassembled form, where each of the two conjugate plates of the corner element 1 of the bowstring of the staircase, which has, for example, an L-shape, consists of a horizontal 2 and a vertical 3 parts. Moreover, one of the mating plates of the corner element 1 is the inner 4, and the other is the outer 5.

In addition, each of the contact surfaces of the inner plate 4 and the outer plate 5 of the corner element 1 is equipped with an additional locking element 6 (corrugation). While the direction of the corrugation of the contact surfaces of the plates 4 and 5 of the corner elements 1 of the bowstring of the stairs, which are additional locking elements, are mutually opposite relative to each other. In addition, each inner plate 4 of the corner element 1 is provided with through slots 7 of elongated shape placed along the longitudinal axis of each part (horizontal 2 and vertical 3) of the inner plate 4 of the corner element 1. And each part (horizontal and vertical) of the outer plate 5 of the corner element 1 is equipped with through grooves 8, for example, of round shape, designed to install the main locking elements 9 — hardware, for example bolts, nuts, screws, screws, etc.

FIG. 3 shows the corner element 1 of the bowstring of the staircase in the assembly and some positions of the elements contained in FIG. 2

In addition, in FIG. 3 indicates pos. 10, which is designated platform, designed to install the steps of the ladder during its assembly. The said platform 10 is attached to the horizontal part of the inner plate 4 with its outer, non-contact with the outer plate 5 side and is designed to install on it the steps of the ladder.

The telescopic design of the bowstring of the staircase claimed as an invention is a prefabricated structure consisting of a set of L-shaped corner elements 1 consisting of at least two plates 4 and 5 (internal and external), including horizontal 2 and vertical 3 parts (FIG. 2). On the inner plate 4 there are made through holes 7 of oblong shape, and on the outer plate 5 there are round through holes 8, which when the plates 4 and 5 are laid over coincide with holes 7 of oblong shape and are intended for installation of the main fixing elements 9 in them. the through holes 7 in the plate 4 are made of an oblong shape, the plates 4 and 5 can move relative to each other and thereby affect the dimensions of the horizontal 2 and vertical 3 parts of the corner elements 1 of the telescopic construction of a bowstring stairs. While the contact surface of the plates 4 and 5 are corrugated and constitute an additional locking element 6, and the direction of the corrugation of the contact surfaces of the plates 4 and 5 are mutually opposite.

The main fixing elements installed when assembling the string in the through holes 7 and 8, made on the plates 4 and 5, are hardware 9, i.e. bolts, screws, nuts, brackets, etc.

Each of the inner plates 4 of the corner element 1 of the bowstring of the staircase with a non-contact side plate 5 is provided with a small platform to which, after assembling the bowstring of the required size corresponding to the opening in which the staircase is to be installed, the steps of the staircase are attached.

The present invention works as follows.

An opening is measured in which the ladder is supposed to be installed, and the size of the required vertical height of the entire ladder and the required height and length of the steps of the ladder are calculated.

After that, the bowstring is assembled from pre-prepared parts of this bowstring, namely, L-shaped corner elements 1 having horizontal 2 and vertical 3 parts consisting of two plates: the inner plate 4 and the outer plate 5. The said plates are brought into contact state and using an additional locking element 6 firmly secured with each other at the required, previously calculated vertical and horizontal values and

- 2 030860 radiate a set of corner elements 1.

Durable fixing of the plates on the required vertical and horizontal value is achieved due to the fact that the additional locking element 6, consisting of two corrugated contact surfaces of the plates 4 and 5, is arranged to move these surfaces relative to each other, and the corrugation of these surfaces is made, for example , jagged, in mutually opposite directions.

After setting the required size of the vertical 3 and horizontal 2 parts of the corner element 1, the contact corrugated surfaces of the plates 4 and 5 are moved relative to each other and snap into place.

Then, the plates 4 and 5 of the corner elements 1, which are closed in the string, are reinforced with each other, using for fixing the main locking elements 9, installed in the through slots of the rounded 8 and oblong 7 shapes, made respectively in the plates 5 and 4. Different kinds of basic locking elements are used hardware 9 - screws, washers, nuts, bolts, brackets, etc. (Fig. 2).

So, the dimensions of the horizontal part of the bowstring and its vertical part are extinct, calculated and installed with the help of main and additional fixing elements. Required bowstring size received.

At the end of the work, to each horizontal 2 part of the corner element 1 of the bowstring of the ladder, on a platform 10 attached to the horizontal inner part of each of the plates 4 of the corner element 1, with its outer, non-contact side with the plate 5, set the step of the ladder.

Thus, the ladder is assembled horizontally, vertically and in length, and is installed in the opening with dimensions corresponding to the opening.

A pilot batch of stairs according to the described invention was made at a pilot production and is in great demand by consumers.

Information sources.

1. RF patent № 72257 for a utility model. IPC E06S 1/383; Е06С 1/58; B64F 5/00, publ. 10.04.2008, bul. No. 10

2. RF patent № 2144122 for invention, IPC E04F 11/02; Е06С 1/38, publ. 01/10/2000.

3. RF patent № 140259 for a utility model, IPC E04F 11/035; publ. 05/10/2014 (prototype).

Claims (7)

CLAIM 1. Telescopic design of the bowstring of the ladder, including the main fixing and corner elements, in which the length of the vertical parts of the corner elements defining the height of the steps of the stairs is less than the length of their horizontal parts determining the width of the steps, characterized in that the design includes additional fixing elements and the bowstring of the stairs made of a set of corner elements designed to change the height and length of the vertical and horizontal parts of the structure of the bowstring ladder, respectively, each The second of the corner elements of the bowstring of the ladder consists of at least two plates, the contact surfaces of which are mutually corrugated, the plates being mounted so that they can move and fix relative to each other, and the corrugated surfaces of at least two plates of the corner elements serve as additional locking elements and are fastened among themselves the main fixing elements. 2. The telescopic design of the bowstring of a staircase according to claim 1, characterized in that the corner elements of the bowstring of a staircase are L-shaped. 3. The telescopic design of the bowstring of a staircase according to claim 1, characterized in that the directions of the corrugation of the contact surfaces of at least two plates of the corner elements of the bowstring of the staircase are mutually opposite to each other. 4. The telescopic design of the bowstring of the stairs according to claims 1, 3, characterized in that the grooved contact surfaces of at least two plates of the corner elements of the bowstring of the stairs are serrated. 5. The telescopic design of the bowstring according to claims 1, 3, 4, characterized in that the toothed pitch and / or pitch of the ribbing of at least two plates of the corner elements of the bowstring of the ladder is from 0.5 to 10 mm. 6. The telescopic design of the bowstring of the stairs according to claim 1, characterized in that the main locking elements are fasteners made in the form of hardware. 7. The telescopic design of the bowstring according to claim 1, characterized in that the bowstring of the ladder is configured to mount the steps of the ladder to the platform mounted on the horizontal part of the inner plate of the corner elements of the bowstring of the ladder. - 3 030860 FIG. one FIG. 2 - 4 030860 FIG. 3