EP3815591B1 - Device and method for levelling out a screed recess - Google Patents

Description

The invention relates to a device for leveling the floor of a screed recess with sealing for the installation of a shower or bathtub. The invention also relates to a method for leveling the floor of a screed recess with sealing for the installation of a shower or bathtub. When replacing showers or bathtubs in the course of renovating sanitary rooms, the problem regularly arises that recesses remain in the screed after the shower or bathtub has been removed. According to the DIN 18534-1:2017-07 standard, a shower or bathtub must be sealed off from the structure or behind and below the bathtub. If the tub is sealed to the structure, the adjoining areas must be completely renewed when the tub is removed again, since it is not possible to subsequently re-seal the existing seal with tile or plaster covering. If you seal behind and under the wall instead, the tub can be replaced without damaging the seal and therefore having to replace it. In the case of a restoration, after removing a tub, due to the usually very difficult conditions of the screed recess, such as running pipes and/or uneven surfaces, the standard-compliant sealing is very expensive, if not even economically feasible. In most cases, the screed recess left after the old tub has been removed is completely filled with screed and then sealed with the surrounding structure. the ES 1075 270 U discloses a device comprising a support frame with a support plate.

To simplify the installation of the drain fitting is in the DE 20 2015 006 212 U1 proposed to position a mounting box on the substrate of the recess and align them in height, so that after pouring the screed an upper edge of the mounting box is aligned substantially flush with the screed.

The disadvantage of the previously known solution is that aligning the mounting box in height and sealing the mounting box after casting the screed is comparatively complex. In addition, access to any lines running in the area of the screed recess is almost impossible after the screed has been poured.

This is where the invention aims to remedy the situation. The object of the invention is to provide a device for leveling the floor of a screed recess for the installation of a shower or bathtub, which allows a base area for the new shower or bathtub to be produced with minimal effort and which also provides accessibility in the area of the screed -Recess running lines is guaranteed. According to the invention, this object is achieved by a device having the features of claim 1.

With the invention, a device for leveling the floor of a screed recess for the installation of a shower or bathtub is provided, which enables a surface for the installation of the new shower or bathtub to be produced with minimal effort and in which the accessibility of in the area of the screed Recess running lines is guaranteed. The device according to the invention comprises a support frame which accommodates at least one support plate, the support frame having a support frame that can be adjusted in length and/or width, on which at least four supports that are infinitely adjustable in length are arranged and which is provided with intermediate struts whose position is within the The support frame is adjustable and on which the at least one support plate can be fastened. The support structure configured in this way can be introduced into the screed recess and adjusted to it in terms of length and width, with the steplessly adjustable supports also enabling a height adjustment of the at least one support plate accommodated by the support frame to the surrounding soil. The support plate positioned level on the support frame according to the invention can then be sealed with the surrounding soil by means of sealing sheets. A shower or bathtub can now be installed on the substrate that has been completely sealed in this way, which can later be easily replaced without damaging the seal.

Several support plates are arranged in a modular fashion on the support frame. As a result, a wing that is tailored to the respective requirements can be assembled in a modular manner on the support frame. The support plates are preferably made of soundproofing material.

In a further development of the invention, the supporting frame is formed from frame struts which are connected to one another via corner connectors, the corner connectors being connected to the frame struts preferably via plug-in connections or screw connections. In this way, a simple assembly of the support structure is achieved with simultaneous adjustment to the length and width of the screed recess.

In an embodiment of the invention, at least one corner connector has two legs whose angle to one another can be adjusted. This allows the support structure to be adapted to a wide variety of shapes of screed recess. In particular, the shoring is not limited to a rectangular shape.

In a further embodiment of the invention, the frame struts and/or the intermediate struts are designed to be telescopically changeable in length. This enables a simple adjustment of the length and/or width of the support structure.

In a further embodiment of the invention, at least two frame struts arranged opposite one another have a longitudinal groove in which at least one intermediate strut is movably mounted. This achieves a simple positioning of the intermediate strut positioned in the frame struts.

In a further development of the invention, at least one intermediate strut has an adapter at the end, which is slidably guided in a longitudinal groove of a frame strut, with means for fixing an adapter being arranged in a longitudinal groove. This fixes the intermediate strut allows after their positioning within the support frame. For example, the fitting piece can be formed by a slot nut or a slide that is guided in the longitudinal groove and can be fixed using a screw or some other clamping device.

In the invention, the support frame and the intermediate struts have support webs which complement each other to form receptacles and are preferably set at right angles and into which at least one support plate is inserted. This simplifies the assembly of the shoring. The integration of the support plates by resting on the support webs between the support frame and intermediate struts also results in high stability of the support structure. Furthermore, this supports a modular design. Different support plates can be used, which have different properties or functions depending on requirements. The support plates are preferably standardized in terms of their length and/or their width.

The support webs can also have formations such as pins or nubs, which correspond to recesses that are provided in the areas of the support plates resting on the support webs. This achieves a mechanical fixation of the panels in the support structure.

In a further embodiment of the invention, at least one support plate has a trough-shaped depression for receiving a drain fitting, which is provided with at least one passage for a drain line and which can be releasably closed, preferably via a form-fitting cover that has an opening for the drain of a shower or Has bathtub. This allows for easy installation of the drain fitting. Access to the drain fitting is ensured via the cover, via which the recess can be releasably closed. Via the opening provided in the cover, which is preferably provided with a connecting piece, a simple connection to the drain of a shower or bathtub on the one hand and to a drain fitting arranged in the depression on the other hand is made possible.

The at least one passage is advantageously provided with a sealing element for sealing against a discharge line that is to be passed through. The bushing is preferably provided with a connecting piece on which the sealing element is arranged. The connecting piece is preferably formed onto the bushing. The sealing element can be formed onto the leadthrough or the connecting piece or can be arranged as a separate component.

In a further embodiment of the invention, the cover has an elastically designed area in which the connecting piece is arranged. The elastically designed area, which can be formed for example in the form of an elastic sleeve or a bellows-like area, allows a simple compensation of an intermediate space between the shower or bathtub to be connected and the support plate.

In a further embodiment of the invention, at least one support plate has a recess which is covered by an elastic collar, with a connecting piece being arranged in the collar. A simple connection to the drain of a shower or bathtub on the one hand and a drain fitting positioned under the support plate on the other hand is made possible via the connecting piece arranged in the sleeve.

In a further development of the invention, at least one support plate is provided with an inspection flap. This ensures accessibility to the inlet and outlet lines running in the area of the screed recess.

In an embodiment of the invention, at least one support plate has a sealed pipe bend for connecting the shower or bathtub drain on the one hand and the drain fitting on the other. This enables a simple connection of a shower or bath tub arranged on the support frame to a drain line arranged under the support plate.

In a further embodiment of the invention, at least one support plate has a connecting element for a support frame for accommodating a shower or bathtub. This enables such a support frame to be fixed in a simple manner. The connecting element can be formed, for example, by a socket, an internal thread or a connection flange.

The invention is also based on the object of providing a method for leveling the floor of a screed recess for the installation of a shower or bathtub, which can be carried out with minimal effort and in which access to the supply or discharge lines running in the area of the screed recess is guaranteed. According to the invention, this object is achieved by a method having the features of claim 13. The fact that a support structure of the aforementioned type is first introduced into the recess, the frame struts and intermediate struts are set to the desired length and the intermediate struts are positioned at a distance and the supports are set to the desired height, allows a three-dimensional adjustment of the support structure to the spatial Design of the screed recess achieved. The fact that supporting plates are then placed on the supporting framework, after which they are sealed off from one another and the adjacent screed and, if necessary, wall area using sealing strips, results in a closed, watertight connecting surface between the floor surrounding the screed recess and an adjacent wall. The height of the supports is preferably set in such a way that the support plates placed on it form a level with the surrounding screed.

In a further development of the invention, a support frame for accommodating a shower or bath tub is applied to the support plates, which are sealed by means of sealing webs. As a result, the structure for accommodating the shower or bathtub is separate from the structure for floor leveling of the screed recess. The support frame is usually first mounted on the shower or bathtub, after which it is applied to the trays. The dimensions and positioning of the shower or bathtub are independent of the design and characteristics of the screed recess and the supporting structure arranged in it. In the event of a renewal of the shower or bathtub recorded by the recording, this can be done without damaging the screed again.

Figur 1

die schematische Darstellung des Tragrahmens eines Traggerüsts

a)

in räumlicher Darstellung;

b)

in der Vorderansicht;

c)

in der Seitenansicht;

d)

in der Draufsicht;

e)

im Schnitt E-E;

f)

in Detailansicht F;

g)

in Detailansicht G;

Figur 2

die schematische Darstellung eines Tragrahmens nach Figur 1 mit Erweiterung:

a)

in räumlicher Darstellung;

b)

in der Vorderansicht;

c)

in der Seitenansicht;

d)

in der Draufsicht;

Figur 3

die schematische Darstellung eines Traggerüsts zur Aufnahme einer Duschwanne mit integrierter Ablaufgarnitur

a)

in räumlicher Darstellung;

b)

in der Vorderansicht;

c)

in der Seitenansicht;

d)

in der Draufsicht;

e)

im Schnitt E-E;

f)

in der Detailansicht F;

Figur 4

die schematische Darstellung der Anordnung des Traggerüsts aus Figur 3 in Explosionsdarstellung:

Figur 5

die schematische Darstellung des Traggerüsts aus Figur 4 im eingebauten Zustand (Tragrahmen bündig mit Estrichoberfläche)

a)

in räumlicher Darstellung;

b)

in der Draufsicht;

c)

im Schnitt C-C;

d)

in der Detailansicht D;

Figur 6

die schematische Darstellung eines Traggerüstes zur Aufnahme einer Duschwanne mit integrierter Ablaufgarnitur in einer weiteren Ausführungsform

a)

in räumlicher Darstellung;

b)

in der Draufsicht;

c)

in der Vorderansicht;

d)

in der Seitenansicht;

e)

im Schnitt E-E;

f)

in der Detailansicht F;

g)

in der Detailansicht G;

Figur 7

die schematische Darstellung des Traggerüsts aus Figur 6 im eingebauten Zustand (Duschwanne in Estrichausnehmung eingelassen)

a)

in räumlicher Darstellung;

b)

in der Draufsicht;

c)

im Schnitt C-C;

d)

in der Detailansicht D;

Figur 8

die schematische Darstellung des Tragrahmens eines Traggerüsts in einer dritten Ausführungsform und

Figur 9

die schematische Darstellung eines Traggerüsts in einer vierten Ausführungsform.

Other developments and refinements of the invention are specified in the remaining dependent claims. Exemplary embodiments of the invention are shown in the drawings and are described in detail below. Show it:

figure 1

the schematic representation of the support frame of a shoring

a)

in spatial representation;

b)

in front view;

c)

in side view;

d)

in top view;

e)

on average EE;

f)

in detailed view F;

G)

in detailed view G;

figure 2

the schematic representation of a support frame figure 1 with extension:

a)

in spatial representation;

b)

in front view;

c)

in side view;

d)

in top view;

figure 3

the schematic representation of a support structure for accommodating a shower tray with integrated drain fitting

a)

in spatial representation;

b)

in front view;

c)

in side view;

d)

in top view;

e)

on average EE;

f)

in the detailed view F;

figure 4

the schematic representation of the arrangement of the shoring figure 3 in exploded view:

figure 5

the schematic representation of the shoring figure 4 when installed (support frame flush with the screed surface)

a)

in spatial representation;

b)

in top view;

c)

on average CC;

d)

in detail view D;

figure 6

the schematic representation of a support structure for receiving a shower tray with integrated drain fitting in a further embodiment

a)

in spatial representation;

b)

in top view;

c)

in front view;

d)

in side view;

e)

on average EE;

f)

in the detailed view F;

G)

in the detailed view G;

figure 7

the schematic representation of the shoring figure 6 when installed (shower tray embedded in screed recess)

a)

in spatial representation;

b)

in top view;

c)

on average CC;

d)

in detail view D;

figure 8

the schematic representation of the support frame of a support structure in a third embodiment and

figure 9

the schematic representation of a shoring in a fourth embodiment.

The support framework 1 selected as an exemplary embodiment is essentially formed by a support frame 2 which accommodates support plates 3 . In the exemplary embodiment, the supporting frame 2 comprises four frame struts 21 which are connected via corner connectors 23 are connected to form a rectangular frame (cf. figure 1 ). In the exemplary embodiment, the frame struts 21 are designed to be telescopically adjustable in length.

Connecting two frame struts 21 arranged opposite one another, an intermediate strut 22 is arranged between them. The intermediate strut 22 is also designed to be telescopically adjustable in length and is provided at the end with adapters 222 with which they engage in longitudinal grooves (not shown) in the frame struts 21 . The intermediate strut 22 is thus slidably connected to the frame struts 21 . The adapters 222 have - not shown - on locking screws, via which they can be fixed in the longitudinal grooves of the frame struts 21.

In the embodiment according to figure 2 the support frame 2 is extended with six frame struts 21 and three intermediate struts 22 are arranged. In this case, two frame struts 21 are connected to one another on two opposite longitudinal sides via a respective corner connector 23, with the two corner connectors 23 also receiving an intermediate strut 22, via which they are connected to one another.

Support webs 211 are arranged on the frame struts 21 on their inwardly directed longitudinal sides, which support webs 221 arranged on the longitudinal sides of the intermediate struts 22 complement each other to form receptacles for support plates 3 . The support webs 211, 221 are positioned on the frame struts 21 and the intermediate struts 22 in such a way that the support plates 3 received by them form a plane with the support frame 2. In the exemplary embodiment, the support webs 211, 221 are each formed by insertion strips 210, 220, which are inserted into the frame struts 21 and cross struts 22 designed as a hollow profile with a longitudinal slot. As in the Figures 1e) to 1g ) shown, the insertion strips 210 of the frame struts 21 have an L-shaped cross section, as a result of which a support web 211 is formed on one longitudinal side of the frame strut. The insertion bars 220 of the intermediate struts 22 have a T-shaped cross-section, whereby at the two Long sides each have a support web 221 is formed. Alternatively, the support webs 211, 221 can also be formed on the frame struts 21 or the intermediate struts 22.

In a further embodiment, the support webs 211, 221 can also be arranged flush with the upper sides of the frame struts 21 or the intermediate struts 22 on these. In this case, the support plates 3 are placed on the surface of the support frame. The support webs 211, 221 can be provided with bores, in particular threaded bores, for fastening the support plates 3 by means of screws.

The support frame 2 of the support structure 1 is provided on its underside with supports 24 which are connected to the corner connectors 23 so that they can be adjusted in height. In the exemplary embodiment, the supports 24 have threaded pins 241 with which they can be screwed into threaded blind holes made in the corner connectors 23 for this purpose. The length of the supports 24 can be adjusted by screwing in or unscrewing the threaded pins 241 of the supports 24 .

The support plates 3 are rectangular in the exemplary embodiment and rest on the support webs 211 , 221 of the frame struts 21 and the intermediate struts 22 . Different configurations of support plates 3 can be used. In figure 9 a flat support plate 3 is arranged, which is provided with an inspection flap 31 . Access to the area within the support structure 1 is made possible via the inspection flap 31 . In the embodiment according to figure 9 the inspection flap 31 is connected pivotably to the support plate 3 via a hinge (not shown).

In the shoring 1 according to Figures 3 and 4 a support plate 3 is used, which has a trough-shaped recess 32 for receiving a drain fitting 4 and which rests on the support webs 211, 221 of the frame struts 21 and the intermediate strut 22. The recess 32 has a 321 for the connecting piece 41 of the waste fitting 4 and is fitted with a positive fit Cover 33 closed. The cover 33 has a circular opening 331 which is closed by an elastic membrane. This membrane serves to connect to a drain fitting 4 inserted into the recess 32 on the one hand and to the drain 51 of a shower tray 5 on the other.

In figure 5 the shoring 1 is shown in the installed state. The support frame is inserted into a screed recess 71 of a screed floor 7 , the support frame 2 being aligned in height via the supports 24 with their threaded pins 241 such that its surface lies in a plane with the surrounding screed floor 7 . The shower tray 5 is selected here to be larger than the existing screed recess 71 and rests on the wall side on the support structure 1 and otherwise on the surrounding screed floor 7 .

In the embodiment according to figure 6 a support plate 3 is arranged, which is provided with an opening 34 . The opening 34 is used for the passage of an arranged drain fitting 4, which is held by an arranged support plate 6, on which it rests. To seal against the drain fitting 4 passing through, the opening 34 can be provided with a ring-shaped sealing collar.

In figure 7 the shoring 1 is shown in the installed state. In this case, the support frame 1 is inserted into a screed recess 71 of a screed floor 7 , the support frame 2 being set back in height relative to the surrounding screed floor 7 via the supports 24 . The shower tray 5 arranged on the support structure 1 is let into the screed recess 71 as a result.

In the embodiment according to figure 8 the support frame 1 is adapted to a substantially quarter-circular screed recess 71 . For this purpose, the frame struts 21 of the support frame 2 are pivotally connected to one another. For this purpose, four frame struts 21 are pivotally connected via corner connectors 23, which correspond to the contour of the screed - recess 71 are aligned. The frame struts 21 and the intermediate strut 22 are in their Adjustable in length in the form of a telescopic strut. In this configuration, a simple adjustment of the supporting framework 1 to the screed recess 71 is made possible.

To level the floor of a screed recess for the installation of a shower or bathtub, a support structure according to the invention is first introduced into the screed recess 71 . The frame struts 21 and the intermediate struts 22 are adjusted to a desired length. Depending on the geometric design of the screed recess 71, the frame struts 21 are connected to one another via rigid or angle-adjustable corner connectors 23. In the exemplary embodiment, the corner connectors 23 have connecting pins 231 which engage in bores arranged at the ends of the associated frame struts 21 for this purpose, as a result of which the frame struts 21 are pivotably connected to the associated corner connector 23 .

The intermediate struts 22 are pushed with their adapters 222 into longitudinal grooves of two frame struts 21 arranged opposite one another and fixed at the respective desired positions. In the exemplary embodiment, the longitudinal grooves are arranged on the underside of the frame struts 21 . The adapters also have a connecting pin 223 which engages in a borehole arranged at the end for this purpose in the intermediate struts 22 . The frame struts 21 and the intermediate struts 22 can be of identical design.

The supporting frame 2 is provided on its underside with supports 24 which have threaded pins 241 with which they are screwed into threaded blind holes in the frame struts 21 . Alternatively, separate height-adjustable supports can also be arranged, they can be positioned under the frame struts and/or the corner connectors and can preferably be releasably connected to them.

Support plates 3 are inserted into the receptacles formed by the supporting webs 211, 221 of the frame struts 21 and intermediate struts 22. Included a support plate 3 with a trough-shaped depression 32 is used at the later position of the shower or bathtub drain, which is provided with a drain fitting 4 and closed with a cover 33 . This support plate 3, the cover 33 of which has an opening 331 which is provided with a membrane, is used to connect the bath or shower drain to the drain fitting 4.

Furthermore, a support plate 3 provided with an inspection flap 31 is inserted at a suitable point in the support frame 3 in order to ensure further accessibility of supply and discharge lines running under the support framework 1 . The upper side of the support frame is completely fitted with support plates 3, the support plates adjoining the surrounding screed floor 7 being cut to size if necessary. The height of the support structure 1 completed in this way is adjusted via the supports 24 in such a way that the surface of the support structure 1 is flush with the surface of the adjacent screed floor 7 .

The surface of the support structure 1 provided with support plates 3 is subsequently sealed liquid-tight via sealing sheets and connected to the surrounding floor 7 or to adjacent walls.

Claims (15)

1. Device for levelling out a screed recess (71) for the installation of a shower tray or bathtub (5) comprising a supporting structure (1), which receives at least one support plate (3), wherein the supporting structure (1) has a support frame (2) adjustable in length and/or width, on which at least four supports (24) infinitely adjustable in length are arranged and which is provided with intermediate struts (22), whose position is adjustable within the support frame (2) and to which the at least one support plate (3) can be attached, wherein the supporting structure (1) has at least two support plates (3) and wherein the frame struts (21) and the intermediate struts (22) have support webs (211, 221) complementing each other to form receptacles, into which at least one support plate (3) is inserted in each case.
2. Device according to claim 1, characterised in that the at least two support plates (3) are made of sound-absorbing material.
3. Device according to claim 1 or 2, characterised in that the support frame (2) is formed of frame struts (21), which are connected to each other via corner connectors (23), wherein the corner connectors (23) are preferably connected to the frame struts (21) via plug connections or screw connections.
4. Device according to claim 3, characterised in that at least one corner connector (23) has at least one joint for a pivotable connection of two frame struts (21), wherein two legs (231) adjustable in their angle to one another are preferably provided.
5. Device according to one of the previous claims, characterised in that the frame struts (21) and/or the intermediate struts (22) are designed so that their length can be changed telescopically.
6. Device according to one of the previous claims, characterised in that at least two oppositely arranged frame struts (21) have a longitudinal groove, in which at least one intermediate strut (22) is displaceably mounted.
7. Device according to claim 6, characterised in that at least one intermediate strut (22) has a fitting piece (222) at each end, which is displaceably guided in a longitudinal groove of a frame strut (21), wherein means for fixing a fitting piece (222) are arranged in a longitudinal groove.
8. Device according to one of the previous claims, characterised in that the support webs (211, 221) of the frame struts (21) and the intermediate struts (22), which complement each other to form receptacles, are set at right angles.
9. Device according to one of the previous claims, characterised in that at least one support plate (3) has a trough-shaped recess (32) for receiving a drain fitting (4), which is provided with at least one lead-through (321) for a drain pipe and which is preferably detachably closable via a form-fitted cover (33), which has an opening (331) for the drain of a shower tray or bathtub (5).
10. Device according to claim 9, characterised in that the cover (33) has an elastically formed region, in which the opening (331) is arranged.
11. Device according to one of the previous claims, characterised in that at least one support plate (3) is provided with an inspection flap (31).
12. Device according to one of the previous claims, characterised in that at least one support plate (3) has a sealed-in pipe bend for connecting the shower or bathtub drain on the one hand and the drain set (4) on the other hand.
13. Method for levelling out a screed recess (71) for the installation of a shower tray or bathtub (5) having a device according to one of the previous claims, wherein a supporting structure (1) is first inserted in the screed recess, whose frame struts (21) and intermediate struts (22) are adjusted to the desired length and the intermediate struts (22) are positioned at a distance and whose supports (24) are adjusted to a desired height, subsequently support plates (3) are placed on the supporting structure (1), after which the support plates (3) are sealed against one another as well as the adjacent screed and, if necessary, the wall area via sealing membranes.
14. Method according to claim 12, characterised in that the height of the supports (24) is adjusted in such a manner that the mounted support plates (3) form a plane with the surrounding screed.
15. Method according to claim 13 or 14, characterised in that a supporting frame for receiving a shower tray or bathtub (5) is placed on the support plates (3) sealed via sealing membranes.

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