RU2717500C1 - Staircase on concealment bolts - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to construction, in particular to the design of stairs, and is intended for creation of cantilever ladders of various shape and parameters and comprising several prefabricated modular elements. Technical result is achieved by the fact that a ladder on concealed bolts includes fastening of steps of ladder using spacer tube from profile pressed from aluminium alloys system "KRAUSS" Ø40 mm with possibility of installation of pin screwed into upper screw on glue with right external thread into upper step with right internal thread pitch of 1.5 mm, with possibility of preliminary screwing in lower screw on glue with left external thread of lower stage with inner, also left-hand thread of high nut-adapter with left external thread, in which there is a possibility of screwing the pin with a lower end, for which the right-hand thread with a smaller pitch of 1.25 mm, wherein it is possible to rotate the pin through the internal slot due to the pin, which is preliminary screwed in through the spacer tube, which in turn is rotatable with a special key, wherein it is possible to tighten two stages by pin due to thread pitch difference at its ends through pin providing inner coupling between spacer tube and pin itself.

EFFECT: proposed design of latent bolt allows to tighten steps of ladder from inside spacer pipe due to rotation of pin, which is transmitted through pin, previously screwed through spacer pipe, thereby achieving effect of complete absence of upper and lower nuts as bearing elements, which gives ease and aesthetic appearance.

1 cl, 9 dwg

Description

The invention relates to the construction, in particular to the design of stairs, and is intended to create cantilevered stairs of various shapes and parameters containing several prefabricated modular elements.

The technical result is the creation of a staircase design, advantageous design when creating a load-bearing unit of a spatial structure, providing an extension of the use of various materials and an attractive design in relation to the prior art. The staircase includes a hidden bolt device; a method for its use is proposed.

The KENNGOTT ladder, according to DIN 18069 type WF-2, which is usually called the bolt ladder, can serve as a useful analogue. [1]

A real breakthrough in the development of staircases was the development in the 60s by the German company KENNGOTT - a bolt staircase. The staircase on the bolts got its name from the German word Bolzen “screw, pin, rod”. The principle of work of this development is that indeed bolts and pins are the basis for attaching this ladder. In general, steps are attached to the bolts in several ways, but they all obey one rule: the front edge of the upper stage rests on the rear edge of the lower stage through the spacer sleeve from the pipe trim, worn on the bolt, which is a metal rod with threaded ends. The bolts themselves are passed through holes in the steps and secured from below with decorative nuts with wide washers or through a steel plate. The immobility of the connection is achieved due to the lock nut wound on the rack from the upper plane of the second stage.

The disadvantage of this device is that structurally in places of contraction of the bolt, almost always in a prominent place above and below the steps are nuts or mounting bolts, as well as a meager selection of material.

The cantilevered staircase “Freietragende Treppe” is known, the principle of attaching the steps of which is based on the use of bolts, but they also have the same drawbacks. [2]

We propose to eliminate the technical shortcomings of the analogue and the prototype, namely, to take into account the possibility of tightening the steps from the inside of the spacer pipe in the development and practical implementation of the new bolt design, thereby achieving the effect of the complete absence of upper and lower nuts, as clearly defined load-bearing elements, as well as a wider the choice of the material used, which gives the stairs lightness and a more aesthetic appearance.

To date, the literature has not described the design of stairs on hidden poles. This circumstance will give us reason to believe that the design claimed by us corresponds to the first feature of the invention established by the legislation of the Russian Federation - novelty. A comparison of the known features of the analogue [1] and prototype [2] with the distinguishing features of our claimed design corresponds to the second feature of the invention - inventive step. The design we propose can easily be put into practice on an industrial scale, therefore, the third feature of the invention, industrial applicability, is also inherent in the object we are claiming.

The design of the hidden bolt we suspect is shown in FIG. 1,

where 1 - screwdriver - lower, with left-hand thread inside and out, is mounted on a special adhesive such as ZAP Z - POXY PT-37 made in USA;

2 - flange washer, reinforcing and decorative element;

3 - adapter nut, external thread left, internal right;

4 - pipe - spacer, sets the height of the tread between steps 8 and 9;

5 - pin, lower thread - right, pitch 1.25 mm, upper thread - right pitch 1.5 mm;

6 - the stud provides internal mating between the pipe - spacer 4 and pin 5;

7 - screwdriver - top, with right-hand thread inside and out;

8. - step - top, made of wood or hardwood material; 9 - step - lower, made of wood or hardwood material.

Installation of a hidden booster is done in stages. First, screwed with adhesive type ZAP Z - POXY PT -37, the upper screw 7 into the upper step 8 with the right external thread into the pre-prepared hole, while the internal thread of the screw driver also has a right side in increments of 1.5 mm. Similarly screwed, with glue the second, lower screwdriver 1 into the lower step 9, with the left external thread, its internal thread will also be left with a step of 1.5 mm. Further, in the lower screwdriver 1, a high nut - adapter 3 is screwed with the left external thread, performing two functions: it presses the lower washer - flange 2 for the spacer pipe 4 and further, the pin 5 is screwed into it with a smaller one at the lower end, with the right thread pitch 1.2 mm.

When the spacer pipe 4 is rotated using a special key, the pin 5 is transmitted through the pin 1 horizontally located in the pin 5, which, thanks to the through groove, has vertical free movement and can be twisted into the upper screw-driver 7, previously mounted on the upper washer - a flange 2.

Upon completion of the installation of the hidden bolt, the through groove in the spacer pipe 4 is closed by a latch with a latch along the entire length - FIG. 2.

The main working structures and dimensions of the hidden bolt: the top screwdriver 7; spacer pipe 4, adapter nut 3, pin 5, stud 6 and lower screw cap are shown respectively in FIG. 3, 4, 5, 6.7 and 8.

In the embodiment, before twisting into the upper screw hole 7, the bottom of the pin 5 by 2 \ 3 is screwed into the adapter nut 3 to a depth of 20 mm., And the height of pin 5 above the pipe — spacer 4 should be no more than 2 ÷ 4 mm., While the height the pipe itself - the spacer 4 will correspond based on the height of the tread 160 ÷ 220 mm

With further screwing, the upper part of the pin 5 with the right thread, a pitch of 1.5 mm into the screwdriver - the upper 7, the lower part of the pin 5 (also with the right thread) will be unscrewed from the nut - adapter 3 with a lower speed due to another thread pitch of 1.25 mm, as a result, there will be a smooth and reliable retraction of two stages 8 and 9 from the inside of the pipe - spacer 4.

The lower value of the specified ratio of the height of the pin 5 above the spacer pipe 4 2 ÷ 4 mm is selected from the fact that with a further decrease in it, the depth of tightening of the pin 5 in the upper screw 7 decreases, this can lead to loss of stability and bending loads.

The upper value of the specified ratio is selected based on the fact that, with its further increase, the pin 5 can pass all the threads of the upper screw-top 7 without having time to tighten through the pipe - spacer 4.

The proposed first version of the industrial design of the step fasteners provides for a spacer pipe 4 profile extruded from aluminum alloys of the KRAUSS system GOST 22233-2001 (manufacturer of System Aluminum JSC).

In the second version of the industrial design of the external interface, as a spacer pipe, you can use any pipe of any material and diameter, which will be at the discretion of the manufacturer.

The design of the hidden external loop of the external coupling suggested by us is presented in FIG. nine,

where 1 - screwdriver - lower, with left-hand thread inside and out, is mounted on adhesive like ZAP Z - POXY PT -37;

2 - flange washer, reinforcing and decorative element;

3 - adapter nut, external thread left, internal right;

4 - pipe - spacer of any material and diameter, sets the height of the tread between steps 8 and 9;

5 - pin, lower thread right, pitch 1.25 mm, upper thread right pitch 1.5 mm;

7 - screwdriver - top, with right-hand thread inside and out;

8 - step - top, made of wood or hardwood material;

9 - step - lower, of wood or hardwood material,

10 - an insert, for example, from a PVC tube is fixed using special glue or in another way with a pipe - spacer 4;

11 - hairpin-2, provides external coupling between the pipe - spacer 4 and pin 5;

12. sleeve, provide roller sliding in the grooves of the liner 10 with external mating between the pipe - spacer 4 and pin 5.

A feature of the working design of the hidden bolt in a smooth spacer tube 4 with external mating is the use of a liner 10, secured with special adhesive inside the spacer tube 4 and the design of the stud 11, which transmits rotational moment through the sleeves 12 to the pin 5 - FIG. eight.

The tests of the hidden bolt on several stairs fully confirmed the correctness of the design and technological solutions.

Using the proposed technical solutions will improve the appearance of the stairs and simplify the work of designers who are forced to “hide” the design feature of the bearing elements of the bolt head and nut of the Boltsev stairs.

Literature

1. TREPPENKATALOG “KENNGOTT” ISBN3-927033-03-0, 1997, www.kengott.de

2. Furopen Patent office EP No. 1103671. Freitragende Treppe, Prioritat: 11.29.1999 DE 29920844 U.

Claims (1)

The staircase on the hidden bolts, including the fixture of the steps of the stairs using a spacer pipe from the profile extruded from aluminum alloys of the KRAUSS system

40 mm, with the possibility of installing a pin screwed into the upper screw on the adhesive with the right external thread in the upper step with the right internal thread in 1.5 mm increments, with the possibility of preliminary screwing into the lower screw on the adhesive with the left external thread of the lower step with the internal the left thread of the high adapter nut with the left external thread, into which it is possible to screw the pin into the lower end, which has a right-hand thread with a smaller pitch of 1.25 mm, while it is possible to rotate the pin through the internal groove due to The bolt is pre-screwed through the expansion pipe, which, in turn, can be rotated with a special key, while it is possible to tighten the two steps with a pin due to the difference in the pitch of the threads at its ends through a pin, which provides internal coupling between the expansion pipe and the pin itself.

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