EP2876222B1 - Unit comprising a fastening device for a wall-mounted toilet and a holding element. - Google Patents

Description

In general, the invention relates to a fastening device for fastening a wall-mounted toilet, often also referred to as a free-hanging toilet, that is to say a toilet which is not seated on the floor but is fastened to a wall with a rear wall.

In particular, the invention relates to a unit according to the preamble of claim 1.

For the fastening of such free-hanging toilets, several fastening means, preferably designed as bolts or threaded bolts, are usually provided in the wall, which protrude from the wall and onto which the back of the toilet, which thus defines an assembly level, is attachable and attachable. Then washers are placed on the fastening bolts and the free-hanging toilet is attached to the threaded bolts with nuts.

There is also a concealed attachment for a laterally closed toilet, which uses the access via the openings for the toilet seat or toilet seat in the top of the toilet. This solution comprises at least two cylindrical fastening bolts fastened at a distance to the wall with a lateral recess in its lateral surface. Holders are fastened or clipped onto the inside of the toilet, which are pushed onto the fastening bolts together with the toilet. Then screw elements designed as grub screws and inserted laterally into the holders are screwed into the recesses of the fastening bolts using an Allen key, and the holder is thus fixed to the fastening bolt with the toilet.

Such a solution is for example in the NL9401071A described for mounting a toilet on a wall. For this fastening, a previously screwed-on sleeve must be arranged in such a way that the opening in the threaded bolt for the fixing bolt is directed upwards, that is to say perpendicularly. This requires very precise assembly. If the sleeve rotates when pushed on, or if only one sleeve of the two usually used is arranged upwards or the second sleeve is slightly offset, the installer must remove the entire toilet bowl from the wall and realign both sleeves.

The DE9004324U1 comprises clamping part elements placed on the two threaded bolts spaced apart from one another on the wall, which after the ceramic has been placed on the threaded bolts in the axial direction be screwed on. Alternatively, the clamping part elements can be screwed onto the threaded bolt during the pre-assembly and then passed through an elongated hole in the ceramic rear wall when the ceramic is put on. In this respect, this elongated hole must be relatively large. In this respect, this device can only be used and clamped if such an elongated hole is available. In terms of manufacturing technology, the provision of a round opening in the ceramic is much easier to design. Another disadvantage of the tensioning device disclosed in this document is that the tensioning elements must first be rotated through 90 degrees before the tensioning process. This may be possible with a washstand that is easily accessible for assembly, but this is impossible with a heavy toilet body, especially a concealed toilet attachment.

The publication DE2252970A represents the closest prior art and discloses a fixture for a sink. With this fastening device, it is also necessary to align a retaining eyelet at an exact angle to a fastening hole within the ceramic. If this is not the case, it is impossible to pass the fastening element through the eyelet. In this solution too, the clamping wedge used must be inserted by the installer through the corresponding hole in the ceramic so that it fits exactly. In this respect, several parts must be connected to each other exactly on the construction site, which is very disadvantageous and expensive in terms of ease of assembly.

The WO2009 / 071178A1 discloses a non-generic fastening device for a toilet ceramic. With this solution, a bolt must be pushed through the ceramic wall from above or from a side wall. In this respect, this solution is also unsuitable for concealed ceramics without openings in the ceramic.

The disadvantage of all solutions is the limited access to the fastening bolts during assembly, especially on the side of the toilet bowl. However, new designs provide closed toilet ceramics or toilet bodies in which the bolts and nuts are not accessible from the side but only from below; if any. This complicates the assembly.

Based on this prior art, the object of the invention is to at least partially avoid these disadvantages and to provide a unit with a fastening device which is easier to assemble, in particular in toilets with fastening bolts that are inaccessible from the side, that is to say laterally closed toilets.

According to the invention, this object is achieved with a unit having the features of claim 1. Advantageous further developments are given in the subclaims.

According to the invention, it is provided that the holder is designed for slidably receiving and guiding the clamping wedge, a linear gear being formed between the holder and the clamping wedge, which can be actuated via the screw element extending transversely to the longitudinal axis of the fastening bolt, the unit comprising a holding element which is connected to the fastening bolt can be connected, the clamping wedge and the holding element having mutually corresponding sliding surfaces and the holder having a passage for pushing through the fastening bolt and the holding element connected to the fastening bolt for pre-fixing the toilet, for pre-fastening the toilet with the holder fastened to its rear wall the fastening bolt with the holding element connected to it can be pushed on until the corresponding ones Sliding surfaces of the holding element and the clamping wedge rest against one another, the pre-fixing of the clamping wedge being adjustable via the screw element to the holder fixed to the toilet while causing movement of the toilet through the sliding surfaces sliding between the holding element and the clamping wedge.

In other words, the holder is designed for fastening to the fastening bolt, which is preferably done by plugging onto the fastening bolt.

This training has numerous advantages. Since the linear gear converts the rotational movement of the screw element into a translational movement, the rotational movement of the screw element can be implemented not only for fastening, as in the prior art, but for pulling or pushing the rear wall of the toilet against the wall, without the fitter the toilet must press against the wall. In this respect, the assembly is considerably simplified and can be implemented in particular as a one-man assembly, even in confined spaces, in particular in the case of a concealed assembly with a laterally closed toilet. If during the assembly of the holder is first connected to the fastening bolt, this holder can already be used for pre-fixing the toilet by the fastening bolt being designed to be hooked in without actuating the linear gear.

According to the invention, the linear gear comprises a clamping element which is movable in the holder and which cooperates with the holding element in the installed position. By turning the screw element, this clamping element is thus moved from an installed position into a clamping position. When adjusting, the holding and clamping elements work together in such a way that the rear wall is first pushed against the wall along the fastening bolt and in the installed position is pressed against the wall.

The fastening device accordingly comprises a holder which can be fastened on the inside on the rear side of the toilet, which is designed for the longitudinally displaceable or translational reception or guidance of a clamping wedge and which has a passage for the fastening means and the holding element connected thereto. The holding element is designed to cooperate with the clamping wedge in the installed position. Finally, the screw element serves to adjust the clamping wedge relative to the holder receiving it. The clamping wedge can thus be adjusted in relation to the holder fixed to the toilet by means of this screw element and thereby causes a movement of the toilet by the sliding surfaces sliding between the holding element and the clamping wedge. In other words, the faces of the clamping wedge and the holding element that face each other in the installed position work together in such a way that the toilet is pulled against the wall when pressed and pressed firmly against the wall in the installed position.

In the preferred embodiment, the holder comprises means for tool-free connection to the inside of the rear wall of the toilet, e.g. Locking tabs, which can be snapped into a through opening of the toilet rear wall, the screw element comprises an adjusting screw and the holding element comprises a knurled nut which can be screwed onto the fastening bolt.

Correspondingly designed sliding surfaces are preferably formed on the clamping wedge and the knurled nut, which interact harmoniously during adjustment. By harmonic is meant that a smooth and even adjustment path is realized. Thanks to a harmoniously rising sliding surface on the clamping wedge Different tightening forces or pull-in paths can also be realized with different adjustment of the clamping wedge, for example, a slight tightening can initially be ensured at the beginning, by a slight slope and then a stronger tightening later on by an increasing slope at the lower end.

The sliding surfaces of the clamping wedge preferably have essentially the shape of a parabola, but can also be designed as a free-form surface adapted to the application.

The horizontal adjustment path of the toilet realized by the unit according to the invention can be in the range from 10 to 20 mm, preferably 10 to 15 mm with a vertical adjustment range of the adjusting screw of approximately 57 mm. A tightening torque of approx. 10 Nm and a calculated surface pressure of the toilet against the wall of 3528 kN / m ² are typically realized.

As part of the assembly, the toilet is first pushed onto the fastening bolts with the holding elements set roughly to length until the front sliding surfaces of the holding elements abut the corresponding sliding surfaces of the clamping wedges and the toilet is thus already held due to its own weight. The clamping wedges are then adjusted using the adjusting screws, the interacting and correspondingly designed sliding surfaces on the clamping wedge sliding against one another around the running slot and the sliding surface of the holding element. The interaction between the clamping wedge and the holding element, preferably the knurled nut, thus realizes an exact fixation of the toilet ceramic on the wall. The clamping wedge, which acts as a slide and is relatively movable in relation to the stationary holder, can thus interact by the design of the one in the installed position Realize sliding surfaces of any adjustment path. Known concealed fasteners, on the other hand, actually only allow fastening or loosening, that is to say no adjustment path of the horizontal movement of the toilet depending on the rotation of the adjustment means. The proposed invention, on the other hand, enables simple adjustment without the application of great force. The invention also enables simple readjustment, for example when using soundproofing elements between the back of the toilet and the wall. So that the toilet is firmly attached to the wall, a part of the soundproofing element, which is usually made of foamed plastic, must be compressed when the toilet is attached, which is easily possible at any time by the device according to the invention to avoid wobbling after the initial assembly.

To simplify the initial assembly, the screw element can comprise quick adjustment means, which allow quick adjustment over a longer adjustment path without rotation. These quick adjustment means preferably comprise a release element which disengages the linear gear, particularly preferably a clamp.

The invention thus offers for the first time the possibility of using the installation space above the attachment, that is to say the slide for the toilet technology, because the adjustment only has to be made from below or from the side. Existing fastening devices require access from the top, which blocks this space for the assembly and toilet technology.

The wall can either comprise a brick wall or a pretext, that is to say a frame construction composed of profiled frames, which with panels and / or Tile is laminated, be trained.

Preferably, at least two of the proposed units are horizontally spaced apart from one another on the rear wall of the toilet, which can be connected in the installed position with corresponding fastening bolts fastened in the wall.

• können die auf die zueinander an der Wand beabstandeten Befestigungsbolzen aufgesetzten Halteelemente im Verhältnis zu den aus dem Stand der Technik bekannten Klemmkeilen wesentlich kleiner ausgebildet sein,
• so dass nur kleine und leicht zu fertigende, runde Durchgangsöffnungen in der Rückwand des WC-Körpers benötigt werden, welche bei einer Keramik in der Entformungsrichtung angeordnet sind,
• so dass die Befestigungsvorrichtungen durch den vorzugsweise geschlossenen WC-Körper völlig verdeckt werden können und insofern komplett unsichtbar sind.

In this respect, the solution according to the invention is particularly suitable for closed toilet bodies, ie toilet bodies, preferably made of ceramic, without openings in the outer wall of the toilet body for access to the inner or rear fastening area on the rear wall, because none of the structure according to the invention Openings in the wall of the toilet body are required. This provides numerous advantages, in particular

• the holding elements placed on the fastening bolts spaced apart from one another on the wall can be made substantially smaller in relation to the clamping wedges known from the prior art,
• so that only small and easy-to-manufacture round through openings in the rear wall of the toilet body are required, which are arranged in the direction of demolding in the case of a ceramic,
• so that the fastening devices can be completely covered by the preferably closed toilet body and are therefore completely invisible.

Also, in contrast to the prior art, the holding element, which is preferably designed as a knurled nut, does not have to be positioned particularly precisely, in contrast to the prior art. In this respect, the fastening device according to the invention enables a particularly simple and assembly-tolerant positioning, because by selecting appropriate tensioning elements and / or the design of which enables a needs-based clamping area to be realized, with which the toilet body can be pressed against the wall by actuating the screw element.

Thus, only the proposed fastening device allows the assembly of the assembly consisting of the toilet body and the fastening devices to be pre-assembled, so that the installer only has to place the toilet body on the threaded bolts fastened to the wall and then tighten the screw element, which is preferably designed as a clamping screw, for final fixing.

Figur 1

einen Längsschnitt des hinteren Endes eines freihängenden WCs;

Figur 2

einen vergrößerten Längsschnitt der Ansicht gemäß Figur 1 mit der Befestigungsvorrichtung in Einbaulage;

Figur 3

eine perspektivische Ansicht der Befestigungsvorrichtung; und

Figur 4

einen Längsschnitt der Befestigungsvorrichtung gemäß Figur 3.

Further details, advantages and features of the invention can be found in the following part of the description, in which an embodiment of the unit according to the invention is explained in more detail with reference to four drawings. Show it:

Figure 1

a longitudinal section of the rear end of a free-hanging toilet;

Figure 2

an enlarged longitudinal section of the view Figure 1 with the fastening device in the installed position;

Figure 3

a perspective view of the fastening device; and

Figure 4

a longitudinal section of the fastening device according to Figure 3 .

The same or equivalent parts are provided with the same reference numerals.

The proposed toilet is essentially formed by a WC designated in its entirety with 2 or a toilet body, preferably made of ceramic, into or into the back of which a flushing water connection designed as a flushing water nozzle 4 is used for supplying flushing water from a one arranged in the back of the wall and with the flushing water nozzle 4 connected via a cistern not shown, which is installed as a concealed cistern in the wall. Via this rinsing water connection 4, rinsing water flows as part of a rinse into a rinsing room 2a defined by the toilet 2 and out of this via a siphon 2b formed in the lower end of the toilet 2 through the waste water connection designed as a discharge nozzle 6 into a drain pipe. The siphon 2b thus prevents, in a known manner, the outflow of odors from the sewer into the toilet 2 by the water contained in the lower bend after the flushing.

The rinsing water connector 4 and the drain connector 6 are each essentially designed as hollow cylindrical injection molded parts, which - with their front ends - seen in the installed position - can be detachably and sealingly inserted into the correspondingly designed receptacles on the back of the toilet body 2 by means of an annular sealing sleeve.

Figure 2 shows an enlarged side view of the fastening device 8 according to the invention in the installed position with the rinsing water connector 4 and the drain connector 6 removed. The fastening device 8 essentially consists of a holder 8a, a clamping wedge 8b and adjusting means.

The holder 8a is designed for fastening to the inside of a rear wall 2d of the toilet 2. In the present case, this is designed as a box-shaped plastic injection molded part which, in plan view, is one elongated, rectangular shape. In this case, a base plate of the holder 8a defines an assembly plane, from which lateral longitudinal and front end walls extend transversely to the plane of the base plate to form a closed frame which surrounds the base plate. With the base plate, this frame of the holder 8a defines a receiving space for the longitudinally displaceable receiving of the clamping wedge 8b, that is to say the receiving space is longer than the clamping wedge 8b. In the middle of the base plate, the holder 8a has a through opening, from which a plurality of latching tabs 8c extend concentrically around the through opening on the rear side of the base plate, counter to the receiving space of the holder 8a defined by the side walls. By means of these latching tabs, the holder 8a can be detachably snapped on the inside with a corresponding through opening in the rear wall 2d of the toilet 2 for fastening.

A fastening bolt 10 screwed into the wall with its proximal end has an external thread at its distal end, that is to say the end remote from the wall, onto which a holding element designed as a knurled nut 12 is screwed. The fastening bolt 10 can be inserted with the knurled nut 12 screwed on through the through opening of the holder 8a, in order to thus already pre-fix the toilet body 2 on the wall, because in this position the top end of the rectangular clamping wedge 8b in the installed position on the top the fastening bolt 10 rests and the toilet 2 is held by the knurled nut 12 due to its own weight.

At the lower end in the installed position, the holder 8a has a through opening with an internal thread, into which an adjusting screw 8d is screwed as a screw element, which is fastened with its front end so that it can rotate lower end of the clamping wedge 8b so that it is adjustable relative to the holder 8a by the rotation of the adjusting screw 8d.

The clamping wedge 8b - in plan view - consists of a rectangular closed frame, which is preferably made of metal or plastic and whose back in the installed position on the holder 8a is flat and the front side is formed with a slope of the front edges, which in the Figures 3 and 4th seen upper end rises to the lower end. The long sides of the clamping wedge 8b define front-side sliding surfaces 8e which, in the installed position, interact with a sliding surface 12a which is correspondingly formed on the front of the knurled nut 12. When adjusting the clamping wedge 8b, this front sliding surface of the knurled nut 8d slides off on the front sliding surfaces 8e of the clamping wedge 8b and pulls the toilet body 2 harmoniously against the wall due to the inclination of the front sliding surfaces 8e.

Obviously, only access from below is required for assembly or fine adjustment. The sides and the upper section of the toilet 2 can therefore be completely closed, which offers considerable hygienic and cleaning advantages.

The invention can be used particularly well for shower toilets, since they require more installation space for the additional flush fitting, which is more easily accessible due to the invention.

Since in the invention the bracing or tightening can take place from below the ceramic, no openings or enlarged openings within the wall of the toilet body or the ceramic are required for access.

In the typical application for attaching a free-hanging toilet to a wall, two fastening bolts are first screwed into corresponding threaded bushes in the wall at a distance from one another, the pre-assembled and equipped with two fastening devices according to the invention is placed on the fastening bolts and then braced against the wall from below. In this respect, the invention also relates to an installation set consisting of at least two threaded bolts and two fastening devices described above.

Reference list

2nd

Toilet body

2a

Washroom

2 B

Primary siphon

2c

paragraph

2d

Back wall

4th

Rinse water supply

6

Drain connector

8th

Fastening device

8a

holder

8b

Wedge

8c

Locking tab

8d

Adjusting screw

8e

Sliding surface

10th

Mounting bolts

12th

Knurled nut

12a

Sliding surface

Claims (6)

1. Unit comprising a holding element (12) and a fastening device (8) for fastening a freely suspended WC on a fixing bolt (10) provided on a wall, the WC comprising a rear wall which defines a fixing plane and is adapted to abut against the wall, the fastening device (8) comprising a holder (8a) that can be fixed to the rear wall and is adapted to receive the fastening bolt (10) in the installed position, a clamping element as well as a screw element (8d) for fixing the holder (8a) to the fastening bolt (10) in the installation position, wherein the clamping element designed as a clamping wedge (8b) is connectible to the fastening bolt (10), wherein the holder (8a) is designed for displaceably receiving and guiding the clamping wedge (8b), wherein a linear transmission is formed between the holder (8a) and clamping wedge (8b), which is actuated via the screw element (8d) extending transversely to the longitudinal axis of the fastening bolt, wherein the unit comprises a holding element (12) which can be connected to the fastening bolt (10), wherein the clamping wedge (8b) and the holding element (12) have sliding surfaces (8e, 12a) corresponding to one another, characterized in that the holder (8a) has a passage for passing through the fastening bolt (10) and the holding element (12) connected to the fastening bolt for pre-fixing the WC (2), wherein for pre-fixing the WC (2) with the holder (8a) fixed on the inside of its rear wall can be pushed onto the fixing bolt with the holding element (12) connected thereto until the mutually corresponding sliding surfaces (8e, 12a) of the holding element (12) and of the clamping part (8b) abut one another, wherein, after the pre-fixing, the clamping wedge (8b) is adjustable via the screw element (8d) to the holder (8a) fixed stationarily to the WC, causing a movement of the WC through the sliding surfaces (8e, 12a) sliding on one another between the holding element and the clamping wedge.
2. Unit according to claim 1, characterized in that the holding element (12) is designed as a knurled screw (12).
3. Unit according to one of the preceding claims, characterized in that the holder (8a) is designed for detachable fastening to the rear wall of the WC (2).
4. Unit according to one of the preceding claims, characterized in that the screw element (8d) comprises quick adjustment means.
5. Unit according to claim 4, characterized in that the quick adjustment means comprise a bracket.
6. Installation set for fixing a freely suspended WC to a wall, comprising two fixing bolts which can be screwed into the wall and two units according to one of the claims 1 to 5.

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