Stairs

Abstract

Stairs are described, comprising a lining made of tread plates (3) fastened in the tread area (2) of the steps (1) and riser plates (5) arranged in the riser area (4) which are held with a lower boundary section between the riser area (4) of the steps (1) and the respectively adjacent bottom tread plate (3) and are overlapped in the upper boundary region (14) by a downwardly projecting boundary nose (16) of the respective upper tread plate (3). In order to provide advantageous fastening conditions it is proposed that the riser plates (5) engage with their bottom boundary section into an upwardly open holder profile (6) which is U-shaped in its cross section and is fastened with the leg (8) on the step side in the riser area (4) of the steps (1) and overlaps the adjacent bottom tread plate (3) with a bent covering flange (10) of the other leg (9).

Description

FIELD OF THE INVENTION

The invention relates to stairs with a lining made of tread plates fastened in the tread area of the steps and riser plates arranged in the riser area which are held with a lower boundary section between the riser area of the steps and the respectively adjacent bottom tread plate and are overlapped in the upper boundary region by a downwardly projecting boundary nose of the respective upper tread plate.

DESCRIPTION OF THE PRIOR ART

In order to line the steps of stairs it is known (EP 1 111 155 A2) to insert tread and riser plates, with the riser plates being held with a lower boundary section between the riser area of the step and the adjacent bottom tread plate and engage with their upper boundary area in a groove on the bottom side of a boundary nose projecting beyond the tread area of the step of the tread plates which are adjacent at the top. The rounded upper boundary region of the riser plates allows a swiveling capability of the riser plates about the rounded upper boundary region as a pivoting axis with a flute provided adjacent to said rounded boundary region on the step side of the riser plates, so that a simple adjustment of the riser plates to the course of the riser region of the steps is enabled. Such a fixing of the riser plates in the upper boundary region requires tread plates however which have a sufficient thickness for forming a receiving groove for the riser plates. A precise adjustment of the adjacent bottom tread plate will become necessary in the region of the bottom boundary section of the riser plates in order to ensure a connection with the smallest possible joint of the rear longitudinal edge of the tread plates pressing the riser plates against the riser area of the steps. This requires a respective versatility in craftsmanship in the machining of the tread plates.

SUMMARY OF THE INVENTION

The invention is thus based on the object of providing stairs of the kind mentioned above in such a way that a favorable fixing of the riser plates can be ensured without requiring a precise machining of the tread plates in the region of their rear longitudinal edge.

This object is achieved by the invention in such a way that the riser plates engage with their bottom boundary section into an upwardly open holder profile which is U-shaped in its cross section and is fastened with the leg on the step side in the riser area of the steps and overlaps the adjacent bottom tread plate with a bent covering flange of the other leg.

Since a separate holder profile is provided for receiving the riser plates, which holder profile is fastened in the riser area of the steps, the fixing of the riser plates is independent of any precise adjustment of the tread plates, so that the tread plates adjacent to the riser plates at the bottom can be cut with a wide tolerance in the region of the rear longitudinal edge. As a result of the bent covering flange which is formed by the holder profile which is U-shaped in its cross section, simple tolerance compensation is offered because tolerance-induced joints between the tread plate and the holder profile are bridged by the covering flange.

To ensure that the covering flange itself can be placed on the overlapped tread plate in a jointless manner, the bent covering flange of the holder profile can project downwardly against the overlapped tread plate. Especially advantageous constructional conditions are obtained in this connection when the bent covering flange of the holder profile has a cross-sectional shape adjusted to a quarter circle and is preferably joined with the adjacent leg of the holder profile by means of a bending area, so that by bending the covering flange relative to the holder profile the contact of the boundary section projecting against the tread plate can be ensured on the tread plate by compensating any thickness tolerance. Said bending of the covering flange about a bending axis extending in the area of the bending also allows adjusting the covering flange to different inclinations of the steps in the riser area.

For the purpose of adjusting the holder profile to the respective inclination of the steps in the riser area, the transitional areas between the legs and the web connecting the legs of the holder profile which is U-shaped in its cross section can form bending points by means of thin places for example, so that in the case of stronger inclinations of the riser area the web of the holder profile can be adjusted to the course of the tread area.

An additional fixing of the riser plates in the upper boundary region will often become superfluous by using the holder profile in accordance with the invention, so that the mere overlap by the downwardly projecting boundary nose of the upwardly adjacent tread plate is sufficient for holding the riser plates. It is understood that additional fixing possibilities can be provided, preferably in such a way that a downwardly open receiving profile for the upper boundary region of the riser plates is provided on the inside of the downwardly projecting boundary nose of the tread plates. Said receiving profile connected with the boundary nose of the tread plates assumes the holding tasks which are fulfilled otherwise by a groove on the bottom side of the tread plates with the advantage that any dependence on the thickness of the tread plates is avoided. In order to achieve a favorable connection of the receiving profile with the boundary nose of the tread plates, the receiving profile can form a fastening web which engages in a groove of the boundary nose of the tread plates and which predetermines the position of the receiving profile relative to the boundary nose of the tread plates.

BRIEF DESCRIPTION OF THE DRAWING

The subject matter of the invention is shown by way of example in the drawings, wherein:

FIG. 1 shows sections of a stair in accordance with the invention in a simplified longitudinal sectional view, and

FIG. 2 shows a cross-sectional view of a holder profile for the riser plates which differs from that in FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The steps 1 of stairs are lined in the tread area 2 with tread plates 3 and in the riser area 4 with riser plates 5. A holder profile 6 is used for fastening the riser plates 5, which profile has a U-shaped cross section with two legs 8 and 9 which are joined by a web 7. While the leg 8 on the step side is fastened in the riser area 4 of steps 1 such as a screwed connection or glued joint, the other leg 9 carries a bent covering flange 10 whose cross section is adjusted of a quarter circle. In accordance with FIG. 1, the bent covering flange 10 is connected by means of a connecting web 11 with the leg 9 of the holder profile 6, with a bending axis being obtained as a result of a thin point 12, about which the covering flange 10 can be bent for adjustment to the inclination conditions of steps 1 in the riser area 4 or for adjustment to the thickness of the tread plates 3. Since the transitional areas between the legs 8, 9 and the web 7 of the holder profile 6 are also obtained by bending points 13 formed by thin places, the U-shaped section of the holder profile 6 can be adjusted to the respective inclination of the riser steps.

For fixing the riser plates 5 in the upper boundary region 14 which are inserted into the holder profile 6, a receiving profile 15 is used which is fastened to the inside of a downwardly projecting boundary nose 16 of the tread plates 3, in accordance with the embodiment by means of a fastening web 17 engaging in the groove of a boundary nose 16. Said receiving profile 15 forms a pivot bearing for the rounded upper boundary section 14 of the riser plates 5, such that the riser plates 5 can be pivoted according to the inclination of the steps 1 in the riser section 4. In order to ensure a sufficient pivoting angle, a flute 18 is adjacent to the rounded boundary section 14 on the inside of the riser plates 5.

For lining the steps 1, the holder profile 6 is fastened at first in the riser area 4 starting with the lowermost step before the riser plate 5 is inserted into the U-shaped cross section of the holder profile 6. The upwardly adjacent tread plate 3 is placed. When a receiving profile 15 is provided, the riser plate 5 will engage in the receiving profile 15. The cover flange 10 of the holder profile 6 for the next step 1 is adjusted by respective bending if required to the tread plates 3 which are glued together with the tread area of steps 1 and a riser plate 5 is inserted, whereupon the process is repeated step by step.

The holder profile 6 can be provided with different configurations because it is merely necessary to receive the riser plates 5 in a U-shaped cross section and to cover the connecting joint to the bottom tread plate 3 by a covering flange. FIG. 2 shows an embodiment of the holder profile 6 which is simplified as compared with FIG. 1. The cover flange 10 which again has the cross-sectional shape of a quarter circle is not attached via a connecting web but directly to the leg 9 of the holder profile 6, which occurs via a thin place 12 so that the adjustability of the covering flange 10 is given about a bending axis extending in the direction of the longitudinal edge of leg 9. The cover flange 10 protrudes with its free boundary section against the bottom tread plate 3, thus facilitating the connection of the covering flange 10 to the tread plate 3.

Claims

1. Stairs with a lining made of tread plates fastened in the tread area of the steps and riser plates arranged in the riser area which are held with a lower boundary section between the riser area of the steps and the respectively adjacent bottom tread plate and are overlapped in the upper boundary region by a downwardly projecting boundary nose of the respective upper tread plate, wherein the riser plates (5) engage with their bottom boundary section into an upwardly open holder profile (6) which is U-shaped in its cross section and is fastened with the leg (8) on the step side in the riser area (4) of the steps (1) overlaps the adjacent bottom tread plate (3) with a bent covering flange (10) of the other leg (9).

2. Stairs according to claim 1, wherein the bent covering flange (10) of the holder profile (6) can project downwardly against the overlapped tread plate.

3. Stairs according to claim 2, wherein the bent covering flange (10) of the holder profile (6) has a cross-sectional shape adjusted to a quarter circle.

4. Stairs according to claim 1, wherein the covering flange (10) is joined with the adjacent leg (9) of the holder profile (6) by means of a bending area (12).

5. Stairs according to claim 1, wherein the transitional areas between the legs (8, 9) and the web (7) connecting the legs (8, 9) of the holder profile (6) which is U-shaped in its cross section from bending points.

6. Stairs according to claim 1, wherein a downwardly open receiving profile (15) for the upper boundary region (14) of the riser plates (5) is provided on the inside of the downwardly projecting boundary nose (16) of the tread plates (3).

7. Stairs according to claim 6, wherein the receiving profile (15) forms a fastening web (17) engaging in a groove of the boundary nose (16) of the tread plates.