EP0312488B2 - Device to restore a staircase - Google Patents

Abstract

The invention relates to a method and a device to restore a staircase. The restoration is effected with the aid of new tread elements (14) which are laid on top of the old steps (11, 12) and are fixed thereto with the aid of tread profiles. The cavities remaining between the old steps, the new tread elements and the profiles are filled with an assembly foam (18) which has a reaction time of several hours and during this time undergoes at most a twofold increase in volume. As a result, it is possible to foam the old steps, the profiles and optionally the tread elements in place, subsequently to assemble and align the different parts precisely, and finally to allow the assembly foam to harden. The tread profile (1) possesses three legs (2, 3, 4) arranged above one another and parallel to one another and a profiled part (6) connecting the latter, which is provided on its visible side with at least one receiving groove (9) intended to receive a cover layer (7). <IMAGE>

Description

The invention relates to a device in Preamble of the defined genus.

For the renovation of old stairs with worn ones or just existing concrete that has been removed Treads are known (DE-U 85 04 095), new tread elements on the old treads hang up and this with special, U or. W-shaped profiles on the tread elements and / or risers (push boards) of the old ones Fasten stairs by screws. A Weak point of the well-known renovation concept is that the profiles for reasons of stability made of metal, especially aluminum need and therefore more colored even when used or coated materials immediately catch the eye, especially when the new treads are off Veneers, foils, carpets or the like exist, to them largely optically to adapt to the existing stair material. The profile as a whole therefore represents, especially since it is a has a relatively high height, optically an immediately striking foreign body, what its Acceptance by architects and homeowners still further impaired.

Another problem with the renovation is in that old stairs often creak, because the tongue and groove connections between the old tread elements and risers loosened to have. So far one has been able to help tighten the loose connections with screws. This does make it a temporary one Removed the creak achieved, but shows the Experience that the creaking sounds after more or reuse for less time, often even to a greater extent because the screws due to the constant impact on the stairs Solve shocks again and then in addition to the tongue and groove connections Give rise to creaking noises.

The invention is based, which Device of the type mentioned at the beginning Application of comparatively simple means to that end to train that the stairs quickly, with permanently good stability and with an appealing exterior appearance refurbished can be. If necessary, it should also be possible be creaking noises before renovation to avoid.

To solve this task, the Features of the claim.

Fig. 1 eine erfindungsgemäß sanierte Treppe im Querschnitt;

Fig. 2 die Einzelheit X der Fig. 1 in starker Vergrößerung;

Fig. 3 in einer schematischen, perspektivischen Ansicht ein Mittel zum Vermeiden von Knarrgeräuschen;

Fig. 4 eine schematische Draufsicht auf eine sanierte Treppe mit einer Abdeckung für eine gerundete Antrittsstufe;

Fig. 5 eine schematische Ansicht der Fig. 4;

The invention is explained in more detail below in connection with the accompanying drawing using exemplary embodiments. Show it:

1 shows a staircase renovated according to the invention in cross section;

Fig. 2 shows the detail X of Figure 1 in a large magnification.

3 shows a schematic, perspective view of a means for avoiding creaking noises;

Figure 4 is a schematic plan view of a renovated staircase with a cover for a rounded step.

Fig. 5 is a schematic view of Fig. 4;

1 and 2 contains an inventive made of metal, especially aluminum Tread edge or tread surface profile 1 one upper leg 2, a middle leg 3 and a lower leg 4. The legs 2 to 4 are arranged essentially parallel to each other and mostly of different lengths. The middle one Leg 3 is the longest, the lower leg 4 is a little shorter. The top is shortest Leg 2, which on its surface with a Corrugation or the like is provided. which is an anti-slip device represents. The outer ends of the legs 2 to 4 are connected by a profile part 6, the 1 between the upper and middle Legs 2 and 3 essentially perpendicular to this runs below the middle leg 3 is concave and then along one formed with a small radius of curvature 7 passes into the lower leg 4, so that in the broadest sense there is a W shape. At the free end of the lower leg 4 can then a web 8 angled by 90 ° is connected. That from the legs 2 to 4, the Profile part 6 and the web 8 existing profile 1 is made in one piece in great length and then into sections with a width of too renovating stairs of appropriate length cut.

As shown in FIG. 2 in particular, the profile part 6 a receiving groove 9 on its outside with a width of, for example, 0.6 to 3 mm on. This receiving groove 9 is used to insert the upper end of a cover layer 10, which in FIG. 1 and 2 is indicated by dash-dotted lines and e.g. out a veneer, a decorative film, a solid color Foil or the like. The cover layer 10 nestles preferably the outside of the whole, section lying below the receiving groove 9 of the profile part 6 and the entire underside of the lower leg 4 close to and extends also over the entire length of the profile 1. The cover layer 10 is preferably covered by a for the connection aluminum / wood or Aluminum / plastic suitable special adhesive firmly connected to profile 1. After one particularly preferred embodiment is the top layer 10 also according to the curvatures the profile part 6 and the bend 7 preformed, so that there is a permanent good fit. The preform can be heated in steam or the like. The strenght or thickness of the cover layer 10 is like that of Receiving groove 9 preferably 0.6 to 3 mm, but other dimensions can be provided for both will. The attachment of the cover layer 10 on Profile 1 is expediently carried out in the profile manufacturer's factory, so that no additional at the construction site Work is required and only the finished profile 1 needs to be used. That with reference to FIG. 1 and 2 profile described for a step 11 will be the one to be renovated for all other steps Stairs used in a corresponding manner as in FIG. 1 for a second step 12 is shown.

Below is a remediation process under Application of the profile according to the invention 1 explained in more detail, usually from the top proceeded below, i.e. with the top step started and provided a flight of stairs the steps of which are forward with the Stepping ridges protruding (riser) are provided.

First there are tread elements 14 cut to the required size and shape, these tread elements 14 e.g. from one Chipboard, especially a fire retardant, cement-bonded chipboard, or a board made of wood, plastic, marble, polymer concrete, veneered Plywood or the like can exist. Each after case, the surfaces of these panels with coverings 15 made of PVC, CV, linoleum, carpet, Needle felt, rubber, nub material, tiles or the like. be documented on the undersides of the tread elements 14 often an associated so-called Requires return 16. This return 16 is preferably also with a sound absorbing Layer 17 made of cork or the like.

To assemble the new step elements 14 are now the surfaces of the old stairs 11 or 12 foamed with an assembly foam and then the prepared new tread elements hung up. Then the between the legs 3 and 4 located cavities the correspondingly prepared profiles 1 at least partially filled with assembly foam 18, while the cavities between the legs 2 and 3 at least partially with one to the Material of tread elements 14 and profiles 1 adapted special adhesive 19 to be filled. The Profiles 1 are then shown in FIG. 1 Mounted way, the leading edges of the new tread elements 14 between each Legs 2 and 3 and the front or tread edges 11a of the old steps 11, 12 between the Legs 3 and 4 come to rest, the Tread edges 11a the associated risers 22 protrude forward.

The tread elements 14 and profiles 1 are now precisely aligned with a scale, and then the webs 8 by means of screws 20 fixed with risers 21 (bumpers) screwed to the old stairs.

In order to avoid that the redeveloped stairs creak when walking on, a creaking agent is introduced between the old stairs 11, 12. In the embodiment according to FIG. 1, this means mainly consists of a newly installed riser 22 which is clamped between the leg 4 of the profile 1 of the upper step 11 and the new step element 14 of the step 12 below it. Since the creaking of old stairs is mostly due to the fact that the tongue and groove connection 23, 24 between the old risers 21 and the old stairs 11, 12 located above them has loosened, the new riser 22 according to the invention has such a height h (FIG 1) Given that the old upper stair step 11 is raised by a preselected dimension of, for example, 2 mm compared to the underlying, also old stair step 12 and thereby the tongue and groove connection 23, 24 is released or relaxed by this dimension. The assembly of the new, raised risers 22 is generally possible by simply lifting the respective upper step. Surprisingly, it has been shown that this measure, ie the spreading apart of the old stairs to a value which is somewhat greater than before the renovation, can permanently eliminate the creaking of old stairs.

To improve this effect, according to the invention continue to be provided, on the one hand the distance between the legs 3 and 4 of the Profile 1 to be chosen so that the mounting foam 18th at a point 25 also in the space between the Leg 4 and the lower edge of the old step 11 can penetrate. On the other hand, in the area located under the new riser 22 between the upper edge of the lower step 12 and the new step element placed on it 14 a reinforced layer 26 of assembly foam applied, making the total the creaking-preventing effect is enhanced.

In the embodiment according to FIG. 3, a device is arranged as a means of avoiding the creaking between a lower, old stair step 29 and an upper, old stair step 30, which consists of two wedge-shaped elements 31, 32 which, for example, as plates with the contour of right-angled triangles are formed, which lie against one another with their preferably serrated or corrugated hypotenuses. The one cathetus of the element 31 is supported on the top of the lower step 29 and the one cathetus of the other element 32 on the upper side of the upper step 30. Both elements 31, 32 are initially provisionally fastened to the old riser 34 by means of screws which are inserted through slots 33 running parallel to the hypothenuses, and then shifted in the direction of the arrows in such a way that the upper step of the stairs is raised somewhat and thereby the preselected dimension h is reached. Finally, the screws or further fastening screws inserted through bores 35 are tightened. The jags or the like formed along the hypotenuses prevent an unwanted change in the set dimension h . The elements 31, 32 can also be installed before the new tread elements 14 and profiles 1 are installed and can therefore be installed between the old risers and the webs 8, 8 or between these and the new risers 22, which in this case are only as Blindings work.

According to the procedure described in principle, profiles 1 can also be installed neither the receiving grooves 9 and cover layers 10 still have the webs 8 and with their legs 4 on the lower edges of the old steps 11,12 are attached. In the event that a means to prevent creaking is provided the application of profiles 1 according to FIGS. 1 and 2 but particularly beneficial. Because this means either with an additional covering, e.g. in Form of the new risers 22, are covered or the new risers 22 themselves Can form means to avoid creaking the same visible with the help of the cover layers 10 Surfaces as with the pads 15 and the risers 22 are generated so that overall a pleasing, consistently the same Appearance.

The starting levels, i.e. the first from below Steps of old stairs often indicate at least a semicircular curve at one end, which extends beyond the side cheeks. The renovation concept according to the invention closes 4 and 5 following additional measures a. One laid between two cheeks 36 staircase already renovated according to the invention has a step 37 on one side is rounded. Since the profile 1 according to the invention only laid along the straight part 38 of the entrance step that ends at a point 39, is 39 according to the invention at this point hollow body-like cover 40, which in the top view is a substantially semicircular Contour. The visible end wall 41 of this Cover 40 is shaped as shown in FIG the profile part 6 of the profile used in the individual case 1, and therefore e.g. with a concave arch Provided lateral surface 41, so that there is a kind hollow cylindrical half shell with the arched Surface 41 results. The radius of this cover 40 corresponds to half the depth of the Entry level 37. The cover 40 is shown in FIG. 4 attached to one end of the old step and glued to it or otherwise connected. The cover 40 can approximately existing parts of the old step in itself record or even from a solid wooden body or the like. In which case the old step was milled out accordingly becomes. There is also a post at entry level 37 42 of a banister supported the new tread element and the cover 40 with corresponding, e.g. semi-cylindrical Recesses are provided which the post 42nd take in. This measure also brings the advantage that the post 42 in the Renovation work not to be dismantled needs. The height of the cover 40 is chosen that its flat top is flush with the Top of the associated new tread element completes.

Otherwise, in Fig. 5 with dashed lines the profile 1 indicated in Fig. 1, from which can be seen is that the cover 40 the outer surface this profile with no significant visible transition can continue. In addition, the new Riser 22 (Fig. 1) in the area of the arch a corresponding, half-ring-shaped cover 43 continue below the cover 40 is arranged and how this corresponding can be preformed. This makes it possible the same outer surfaces in the area of the curves as with the cover layers 10 (Fig. 1) create, especially for both, the same materials to use. On the cover 40 or the old step can be removed before installing the described assembly foam are applied, the one that stabilizes after curing Layer 44 (Fig. 5) forms.

The attachment of the receiving groove according to the invention allows most visible surfaces of the profiles with covering layers that in appearance and material to the surfaces of the for the tread elements and risers or other stair components used surface coatings are adjusted. Therefore the overall impression of the old stairs either largely left unchanged or uniform to be changed. The top layers need to be used in the lower part only up to the new one Raiser to hand. The top layers are sufficient in the upper part preferably up to about the point where the middle legs meet the front limit front profile parts as it is in general it is tolerated that redeveloped stairs are a End edge, which are made of a metal or a different one compared to the rest of the stairs Material exists. Otherwise, the receiving groove has the advantage with the fact that it prevents the ingress of water, e.g. when cleaning, in the spaces between the profiles and the top layers and thus one prevent any swelling of the cover layers. In addition, protruding top layer edges or complex work steps for clean milling of the top layers avoided at their ends.

The invention is not based on those described Embodiments limited to multiple Modify way.

Claims (1)

1. A device for renovating stairs, having a tread profile (1, 46, 74, 82) which has three arms (2, 3, 4) - arranged substantially one above the other and parallel to one another - and a profile part (6, 46, 74, 85) connecting the arms, the upper and the middle arms (2, 3) being intended to grip around a new tread element (14) and the middle and the lower arms (3, 4) being intended to grip around a projecting step edge (11a) of the step, characterised in that the profile part (6, 46, 74, 85) has - on its visible side - single receiving groove (9, 83, 90) intended to receive one end, e.g. the upper end, of a cover layer (10, 87), and in that the profile part (6, 46, 74, 85) is curved concavely towards the lower arm (4) and extends towards the rear.

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