EP4273333A1 - Wall built-in cistern with leakage protection - Google Patents

Abstract

The invention relates to a wall-mounted cistern for a sanitary basin, in particular a toilet bowl, with a box body (1.1) which has an inspection opening (12) on its front or top side, a water inlet connection, and a flushing pipe (4) for directing flushing water from the Box body (1.1) for the sanitary basin, and a leakage protection, which is designed as a dimensionally stable and water-impermeable shell (20), which at least partially surrounds the box body (1.1) and the flushing pipe (4) and has an opening (22). In order to ensure that such a built-in cistern can be installed particularly easily and quickly on site and offers robust and reliable leakage protection, the invention provides that the opening (22) of the shell (20) has an opening width (B1), which is smaller than the width (B2) of the box body (1.1), the opening (22) of the shell (20) at least partially overlapping with the inspection opening (12) of the box body (1.1) and with a dimensionally stable inspection box element (21) is provided, the circumferential wall (21.2) of which is impermeable to water and is connected to the shell (20) in a water-impermeable manner.

Description

The invention relates to a wall-mounted cistern for a sanitary basin, in particular for a toilet or urinal basin, with a box body which has an inspection opening on its front or top, a water inlet connection, a flushing pipe for guiding flushing water from the box body to the sanitary basin, and a leakage protection , which is designed as a dimensionally stable and water-impermeable shell which at least partially surrounds the box body and the flushing pipe and has an opening.

A generic wall-mounted cistern can also be referred to as a built-in cistern or concealed cistern.

Such built-in cisterns are known in various designs. They are primarily intended for sanitary areas made of wood or wood-based materials, especially for wooden houses. Because wood and engineered wood are more sensitive to moisture and water leaks than, for example, stone and concrete, several countries where homes are often constructed of wood and engineered wood have adopted strict regulations to prevent water damage. For example, in the case of a toilet cistern, minor damage to the cistern can occur on the construction site or during assembly and remain undetected, which results in a hidden water leak, particularly in wall-mounted cisterns. For example, in Norway, where wood and wood-based materials are widely used in house construction, it is stipulated that a waterproof barrier must be built behind a sanitary cistern to prevent leaks from penetrating the wall and damaging the building structure.

For such areas of application is from the EP 2 397 613 A1 a built-in cistern with moisture and leakage protection. The moisture and leakage protection is designed as a flexible, waterproof protective cover surrounding the cistern and the flush pipe connected to it, with a hose-like extension being formed on the underside of the protective cover with at least one opening on the underside at the end. However, the disadvantage of this design is that the relatively thin protective cover, which is made of a plastic film, is relatively easily damaged during transport and installation and such damage cannot be easily discovered. The thin protective cover is at risk of injury, for example if an assembly frame pre-assembled with the cistern and the thin protective cover accidentally falls over on the construction site.

From the EP 2 821 557 A1 Another built-in cistern with leakage protection is known. In this built-in cistern, a leak protection device is designed as a dimensionally stable and water-impermeable shell. The shell encloses the cistern and the flush pipe connected to it, with the front of the shell initially being completely open. The shell has a circumferential wall that defines a front edge that extends at least to a wall surface of a vertical wall into which the shell is installed together with the cistern. The depth of the circumferential shell wall is preferably dimensioned such that the front edge initially protrudes over the wall surface in the direction of the center of the room in the relevant sanitary room. In the fully assembled installation position, this front edge is then shortened by cutting to the appropriate installation depth and is then flush with the wall surface. After assembly, a cover plate is inserted into the shell and secured in place. The cover plate is aligned flush with the wall surface surrounding the shell. The cover plate and the wall surface can then be covered together, for example with wall tiles. The disadvantage of this solution is the amount of work on site for the flush shortening of the surrounding shell wall and the amount of work required for the flush alignment, fastening and sealing of the cover plate inserted into the shell.

If the cover plate is not aligned precisely relative to the wall surface, this work can lead to a horizontal offset in the tile covering and thus lead to complaints.

Based on this, the invention is based on the object of providing a wall-mounted cistern which can be installed particularly easily and quickly on site and also offers robust and reliable leakage protection.

This task is solved by a built-in cistern with the features specified in claim 1. Advantageous embodiments of the invention are specified in the subclaims.

The built-in cistern according to the invention is provided with a leak protection, which is designed as a dimensionally stable and water-impermeable shell, which at least partially surrounds the box body of the cistern and the flush pipe and has an opening, this opening having an opening width that is smaller than the width of the Box body, the opening of the shell at least partially overlapping the inspection opening of the box body and being provided with a dimensionally stable inspection box element, the circumferential wall of which is impermeable to water and is connected to the shell in a watertight manner.

“Stable in shape” in the context of the present invention and in relation to the shell and the inspection box element means that the shell and the inspection box element are not flexible, but rather rigid or substantially rigid, e.g. B. are resistant to bending. The shell and the inspection box element are preferably made of plastic.

The opening width of the shell opening, which is provided with the inspection box element, is, for example, less than 90%, preferably less than 80%, of the width of the box body.

If the inspection opening of the box body is formed on its front side, the opening of the dimensionally stable and water-impermeable shell, which is provided with the dimensionally stable inspection box element, is formed on the front side of the shell. If, on the other hand, the inspection opening of the box body is formed on its top side, the opening of the dimensionally stable and water-impermeable shell and the dimensionally stable inspection box element are formed on the top side of the shell. In both cases, the shell can be designed so that it essentially completely surrounds the box body - with the exception of its inspection opening. In addition, in both cases the shell can be designed in such a way that it essentially completely surrounds the flushing pipe. Only a lower end of the flushing pipe, with which the flushing pipe is attached to the sanitary basin, e.g. B. toilet bowl is connected, or the end of an extension pipe piece connected to the lower end of the flush pipe, which is connected to the sanitary basin, may lie outside the shell, but in any case the shell is in the area of the lower end of the flush pipe on the outside the wall in which the cistern is installed, so that any leakage water that may escape from the cistern cannot flow into the wall, but in front of the wall into the room equipped with the sanitary basin or into the sanitary basin.

Preferably, the dimensionally stable, water-impermeable shell of the wall-mounted cistern according to the invention, which functions as a leak protection, has, in addition to the opening assigned to the inspection opening, which is provided with a dimensionally stable inspection box element, a further or second opening which is assigned to the water inlet connection of the cistern. This further or second opening of the shell is many times smaller than its opening assigned to the inspection opening. The further or second opening is preferably in the area of the water inlet connection and is essentially aligned with its central axis. A filling valve is or can be connected to the water inlet connection. Preferably, the further or second opening of the shell is connected in a watertight manner to the water inlet connection or a water pipe connected thereto. The further or second opening can be on a narrow side of the shell and preferably, Based on the installed position of use of the cistern, lie in a height range of the shell in which the upper half or the upper third of the inspection box element lies. Alternatively, the further or second opening can also be located on the top of the shell.

The dimensionally stable and water-impermeable shell and the dimensionally stable inspection box element, the circumferential wall of which is impermeable to water and is connected to the shell in a water-impermeable manner, offer a flexible protective cover in comparison to the flexible protective cover made from plastic film EP 2 397 613 A1 , which can be easily damaged by sharp tools or screws, provides robust and reliable leakage protection. In addition, the built-in cistern according to the invention can be assembled particularly easily and quickly on site, since the shell at least partially surrounds the box body and the flushing pipe, preferably essentially completely surrounds it with the exception of the inspection opening of the box body and the end of the flushing pipe connected to the sanitary basin. Inserting a cover plate into a dimensionally stable shell that is open on its front, aligning, fastening and sealing the cover plate flush, as with the leakage protection device EP 2 821 557 A1 required, are neither provided nor required in the solution according to the invention. Preferably, the wall-mounted cistern according to the invention, including the leakage protection, is pre-assembled in a mounting frame.

The dimensionally stable shell of the built-in cistern according to the invention is preferably designed so that it is completely closed at least below the inspection box element attached or molded to it up to its opening (mouth) at the lower end of the flush pipe and is therefore impermeable to water. For this purpose, the shell is preferably designed so that it at least partially encloses the box body of the built-in cistern on its rear side. The same applies to side areas arranged within the relevant room wall or pre-wall, the underside and the front of the box body of the cistern as well as to the circumferential outside (outer surface) of the flush pipe.

The water-impermeable shell designed in this way prevents water from escaping on one of the side areas mentioned and on one of the sides of the box body as well as on the circumferential outside of the flushing pipe and entering the wall surrounding the built-in cistern.

An advantageous embodiment of the invention is characterized in that the shell has an elongated, tubular, essentially vertically extending section which at least partially surrounds the flushing pipe. This configuration enables relatively low material consumption to produce the shell. In addition, the elongated, tubular, essentially vertical section that surrounds the flushing pipe takes up comparatively little space, so that space remains on the side of this section that can be used to arrange other components, e.g. B. for arranging a hot water boiler for a shower toilet or a transformer for an electrical actuation device for electronically triggering a toilet or urinal flush.

According to a further embodiment of the invention, the elongated, tubular section can have a substantially horizontally extending pipe socket at its lower end, which protrudes forward from the elongated, tubular section. This configuration is advantageous from a manufacturing point of view and at the same time gives the elongated, tubular section positive dimensional stability.

A further embodiment of the invention is characterized in that the shell has a box-shaped section which at least partially surrounds the box body. This configuration also advantageously contributes to the dimensional stability of the shell as well as to simple and quick assembly of the wall-mounted cistern, which is preferably pre-assembled in a mounting frame.

In order to ensure that the shell, which acts as leakage protection, has a sufficiently high level of dimensional stability with a relatively low wall thickness and correspondingly low material consumption and to provide a high level of robustness, a further embodiment of the invention provides that the box-shaped section of the shell in its front wall and / or rear wall, viewed from the outside, has at least two, preferably at least three recesses, for example elongated recesses that run essentially parallel to one another. When the shell is in the intended assembled state, the depressions preferably run essentially horizontally and are designed, for example, as elongated beads.

It is also advantageous to achieve sufficiently high dimensional stability and high robustness of the shell with low material consumption if, according to a further embodiment of the invention, the box-shaped section of the shell has one or more beads in its front wall and / or rear wall, which extend into one Extend bottom of the box-shaped section. The beads are preferably designed in such a way that they end at a distance from the inside of the opposite rear wall or front wall of the box-shaped section of the shell. As a result, any leakage water that may occur in the box-shaped section can flow away essentially unhindered in the direction of the flushing pipe and the section of the shell surrounding the flushing pipe.

The dimensionally stable and water-impermeable shell of the wall-mounted cistern according to the invention can, for example, have an average wall thickness in the range of 0.8 mm to 2.5 mm, preferably in the range of 1.0 mm to 2.2 mm, particularly preferably in the range of 1.4 mm to 2.0 mm, especially if it has the above-mentioned depressions, for example the elongated depressions or beads that run essentially parallel to one another.

According to a further advantageous embodiment of the built-in cistern according to the invention, its dimensionally stable, water-impermeable shell has at least one, preferably at least two fastening elements for fastening the bowl to a mounting frame, the fastening elements preferably being of Narrow sides of the bowl protrude. The shell can thus be pre-assembled or attached to the mounting frame directly and essentially independently of the box body of the cistern. In particular, in this embodiment - in contrast to that from the EP 2 821 557 A1 known solution - it is not necessary to provide passage points in the shell for the passage of fastening elements formed on the box body of the cistern and to seal such passage points and the fastening elements of the box body arranged therein against the escape of leakage water.

In the wall-mounted cistern according to the invention, the position of the cistern body inserted into the dimensionally stable, water-impermeable shell can be fixed relative to the shell, for example on the inspection box element, by means of a fastening frame of an actuation plate, in that the fastening frame is screwed to the cistern body in a supported manner on the outside of a wall covering surrounding the inspection shaft .

A further advantageous embodiment of the invention is characterized in that the inspection box element has a closed end wall at its projecting end, which can be removed by means of a cutting process or cutting tool. The closed end wall of the inspection box element can serve as building protection and prevents the wall-mounted cistern according to the invention from being covered with wall covering material, e.g. B. Tiles, penetration of building materials into the cistern. After the wall covering has been laid, the protruding end of the inspection box element can be cut off flush with the wall covering. This adaptive shortening of the inspection box element is in comparison to the shortening of the circumferential, forward-projecting wall of the relatively large leak protection shell according to EP 2 821 557 A1 quick to execute and less time consuming.

Analogous to the design of the inspection box element described above, the section of the shell which contains the flushing pipe at least partially surrounds, have at its lower end a closed end wall which can be removed using a cutting tool. This closed front wall can also serve as building protection; When covering the wall-mounted cistern according to the invention with a wall covering material, it prevents building material from penetrating into the lower end of the flush pipe.

According to a further advantageous embodiment of the built-in cistern according to the invention, the dimensionally stable, water-impermeable shell is composed of a rear shell part and a front shell part, each of the shell parts defining a cavity section. This configuration enables a particularly compact dimensioning of the dimensionally stable, water-impermeable shell. The two shell parts can be produced, for example, by deep-drawing thermoplastic sheets.

The waterproofness of the shell composed of the shell parts can be achieved in a simple and reliable manner by the shell parts having, for example, connecting edges or connecting flanges facing one another, which are connected to one another in a watertight manner. In a further embodiment of the invention, a seal, preferably a circumferential seal, can be arranged between the connecting edges or connecting flanges. For this purpose, when forming, for example deep drawing, the shell parts, a circumferential groove can be formed in at least one circumferential connecting flange, into which a seal, for example a circumferential rubber seal, is inserted before the two shell parts are placed together.

Furthermore, an advantageous embodiment of the invention provides that the two shell parts are screwed and/or glued together and/or connected by means of clamping means. This makes it possible to achieve a permanent, water-impermeable connection between the shell parts.

A further or different advantageous embodiment of the invention is characterized in that the shell is produced by blow molding as a one-piece box-shaped shell, the box body of the wall-mounted cistern being inserted into the box-shaped shell together with the flush pipe attached to it via an opening on the top side of the box-shaped shell, and wherein the top opening of the bowl is closed with a lid. Due to the one-piece box-shaped shell, this design does not require the arrangement of a seal on the underside and in the area of the narrow side sides of the shell. On the other hand, the installation depth required for inserting the cistern into the leak protection shell should generally be greater with the same cistern with flush pipe bend in the one-piece box-shaped shell than in the embodiment described above, in which the dimensionally stable, water-impermeable shell is composed of a rear shell part and a front shell part .

The lid is preferably connected to the one-piece box-shaped shell in a watertight manner. For this purpose, the shell can be provided with a circumferential seal at its top opening. Furthermore, the lid is preferably detachably connected to the one-piece box-shaped shell, for example by means of screws, clamping means and/or locking means.

Fig. 1

einen Montagerahmen mit einem erfindungsgemäßen Wandeinbau-Spülkasten mit Leckageschutz, in einer perspektivischen Vorderansicht;

Fig. 2

den Montagerahmen mit Spülkasten und Leckageschutz aus Fig. 1, wiederum in einer perspektivischen Vorderansicht, wobei der Leckageschutz in einer Explosionsdarstellung gezeigt ist;

Fig. 3

den Spülkasten mit Leckageschutz aus Fig. 1 (ohne Montagerahmen), in einer vertikalen Schnittansicht entlang der vertikalen Mittelachse des Spülrohres;

Fig. 4

einen Montagerahmen mit einem erfindungsgemäßen Wandeinbau-Spülkasten mit Leckageschutz gemäß einem weiteren Ausführungsbeispiel, in einer perspektivischen Vorderansicht;

Fig. 5

den Montagerahmen mit Spülkasten und Leckageschutz aus Fig. 4, in einer perspektivischen Rückansicht;

Fig. 6

den Leckageschutz aus den Figuren 4 und 5 mit dem darüber angeordneten Spülkasten, in einer perspektivischen Vorderansicht; und

Fig. 7

den Spülkasten mit Leckageschutz aus Fig. 4 (ohne Montagerahmen), in einer vertikalen Schnittansicht entlang der vertikalen Mittelachse des Spülrohres.

The invention is explained in more detail below using a drawing showing exemplary embodiments. Show it:

Fig. 1

a mounting frame with a wall-mounted cistern according to the invention with leakage protection, in a perspective front view;

Fig. 2

the mounting frame with cistern and leak protection Fig. 1 , again in a perspective front view, with the leakage protection shown in an exploded view;

Fig. 3

the cistern with leak protection Fig. 1 (without mounting frame), in a vertical sectional view along the vertical central axis of the flushing pipe;

Fig. 4

a mounting frame with a wall-mounted cistern according to the invention with leakage protection according to a further exemplary embodiment, in a perspective front view;

Fig. 5

the mounting frame with cistern and leak protection Fig. 4 , in a perspective rear view;

Fig. 6

the leakage protection from the Figures 4 and 5 with the cistern arranged above it, in a perspective front view; and

Fig. 7

the cistern with leak protection Fig. 4 (without mounting frame), in a vertical sectional view along the vertical central axis of the flushing pipe.

Fig. 1 shows a wall-mounted cistern 1 for a toilet or urinal. The cistern 1 is attached to a mounting frame 2. The mounting frame 2 has (as is known) vertical profile supports 2.1, 2.2, preferably square tubes, which are connected to one another by cross members 2.3, 2.4, 2.5. The upper cross member 2.3 preferably defines the top of the mounting frame 2. A lower cross member 2.4 is arranged near the lower ends of the profile supports 2.1, 2.2. Another cross member 2.5 is provided with fastening holes 3 for fastening threaded rods (not shown), which in turn serve to fasten or suspend a toilet or urinal bowl. For this purpose, 3 threaded sleeves can be inserted into the fastening holes in a positive and non-positive manner. The cross member 2.5 has a significantly greater height than the other cross members. Between the fastening holes 3, a recess is formed in the cross member 2.5, for example a through opening, in which there is radial play End of a flushing pipe 4 or an extension pipe piece (not shown) connected to the flushing pipe is arranged. In addition, the mounting frame has 2 foot pieces 5.1, 5.2, which are height-adjustable or telescopically connected to the lower ends of the profile supports 2.1, 2.2.

The wall-mounted cistern 1 has a box body 1.1 for holding water. A drain valve 6 is arranged in the box body 1.1, which can be operated manually or automatically using a suitable actuating device. For example, the actuating device can be designed in the form of a so-called actuating plate, which has at least one control button (push button) movably mounted thereon, by means of which, via a lifting mechanism 7, a valve body (closure body) 8 designed as an overflow pipe, which has a valve body (closure body) 8 in the closed position at its lower end Valve seat of the drain valve 6 has a seal 9 resting on it. If the valve body 8 is raised from the closed position into a flushing position by means of the lifting mechanism 7, water flows as flushing water from the box body 1.1 through the flushing pipe 4 connected to the box body to the toilet or urinal bowl (cf. Fig. 3 ).

Furthermore, the box body 1.1 has a water inlet connection 11, to which a float-controlled filling valve (not shown) arranged in the box body 1.1 is connected. The filling valve and the drain valve 6 are accessible for maintenance purposes via an inspection opening 12. The inspection opening 12 is formed in the upper area of the box body 1.1.

In the in Fig. 1 and Fig. 4 In the exemplary embodiments shown, the inspection opening 12 is arranged on the front of the box body 1.1. However, it is also possible to form the inspection opening 12 on the top of such a box body. In the latter case, the upper cross member 2.3 of the mounting frame 2 is omitted if necessary or designed differently, for example as a substantially flat web, the flat side of the web being able to be flush with the front of the profile supports 2.1, 2.2.

Arranging the inspection opening 12 on the top of the box body 1.1 is sometimes advantageous, for example if the built-in cistern 1 is to be installed in a pre-wall below a building window.

The wall-mounted cistern 1 is provided with a leak protection 19, which is designed as a dimensionally stable and water-impermeable shell 20. The shell 20 surrounds the box body 1.1 and the flushing pipe 4 at least partially, preferably essentially completely. The dimensionally stable and water-impermeable shell 20 has or receives an opening 22 which is assigned to the inspection opening 12 of the box body 1.1. In the in the Figures 1 to 3 In the exemplary embodiment shown, the opening 22 is still closed by an end wall 21.1 of a dimensionally stable inspection box element 21 that is to be removed (cf. in the Figures 4 and 7 shown embodiment).

The opening 22 of the shell 20 has an opening width B1 which is significantly smaller than the width B2 of the box body 1.1, with the opening 22 at least partially overlapping the inspection opening of the box body 1.1 (cf. Fig. 3 ). The opening 22 of the shell 20 is provided with a dimensionally stable inspection box element 21, the circumferential wall 21.2 of which is impermeable to water and is connected to the shell 20 in a water-impermeable manner.

The shell 20 has a box-shaped section 20.1, which surrounds the box body 1.1, and underneath an elongated, tubular, essentially vertically extending section 20.2, which surrounds the flushing pipe 4. The elongated, tubular section 20.2 has at its lower end a substantially horizontally extending pipe socket 20.30, which projects forward from the section 20.2.

The box-shaped section 20.1 of the shell 20 has in its front wall 20.41 and rear wall 20.51, viewed from the outside, at least two, for example three, elongated recesses 24 that run essentially parallel to one another. The Depressions 24 run essentially horizontally in the fully assembled, intended state of the built-in cistern 1. Furthermore, beads 25 are formed in the front wall 20.41 and in the rear wall 20.51 of the box-shaped section of the shell 20, which extend into the bottom 20.3 of the box-shaped section 20.1. The beads 25 are designed in such a way that they end at a distance from the inside of the opposite rear wall 20.51 or front wall 20.41 of the box-shaped section of the shell 20.

In the in Fig. 1 In the illustrated embodiment, the shell 20 is composed of a rear shell part 20.5 and a front shell part 20.4, each of the shell parts 20.4, 20.5 defining a cavity section. The two shell parts 20.4, 20.5 are each designed to be rigid or essentially rigid. They are preferably made of plastic, particularly preferably of thermoplastic, for example by deep drawing plate-shaped thermoplastic blanks. The average wall thickness of the shell 20 or the shell parts 20.4, 20.5 is, for example, in the range from 0.8 to 2.5 mm, preferably in the range from 1.0 to 2.2 mm, particularly preferably in the range from 1.4 to 2 .0mm.

The inspection box element 21 is preferably connected in one piece to the shell 20 or the front shell part 20.4 or is formed on it. If the shell parts 20.4, 20.5 are produced by deep drawing plate-shaped plastic blanks, the inspection box element 21 and/or the pipe socket 20.30 assigned to the lower end of the flushing pipe 4 are formed at the same time. The inspection box element 21 then has a closed end wall 21.1 at its protruding end, which is later removed using a cutting tool. The shell 20 then has the opening 22 already mentioned above, which is assigned to the inspection opening 12 of the cistern body 1.1. Likewise, the pipe socket 20.30 has a closed end wall 20.31 at its protruding end, which can be removed using a cutting tool. The closed end walls 21.1, 20.31 can initially be used as building protection.

The shell parts 20.4, 20.5 have mutually facing connecting flanges 20.42, 20.52, which are connected to one another in a watertight manner. A seal 26, preferably a circumferential seal 26, is arranged between the connecting flanges 20.42, 20.52. At least one of the connecting flanges 20.42, 20.52 has a circumferential groove into which the seal 26 is inserted (cf. Fig. 3 ). The seal 26 is made, for example, from a so-called foam rubber or another rubber-like material. In addition, the shell parts 20.4, 20.5 are screwed together. For this purpose, eyelets 20.43, 20.53 or the like are formed on the side edges of the connecting flanges 20.42, 20.52, which have holes for receiving screws or rivets. Alternatively or additionally, the shell parts 20.4, 20.5 can also be connected to one another by clamping means (not shown).

To attach the leakage protection 19 to the mounting frame 2, the shell 20 is provided with fastening elements 27. The fastening elements 27 protrude from the narrow sides of the shell 20. They are preferably attached in the upper side area of the front shell part 20.4, for example screwed on in a waterproof manner and/or glued or welded on.

A through opening 28 is made in one of the shell parts 20.4, 20.5, which is assigned to the water inlet connection 11 of the cistern. In Fig. 2 It can be seen that the through opening 28 was formed, for example, in the upper side area of the rear shell part 20.5. A water pipe 30, preferably a hose, can be guided through the through opening 28 to the water inlet connection 11 of the cistern. To seal the through opening 28 with the water pipe 30 running therein, for example, a seal for a cable bushing is used. Such a seal can consist of a rubber ring seal that can be used in a force-fitting and form-fitting manner or, alternatively, have a threaded sleeve, a union nut 31 and a rubber-elastic ring seal, the ring seal being screwed onto the union nut 31 when the union nut 31 is screwed on Threaded sleeve is axially compressed and pressed radially inwards against the water pipe 30 (cf. Fig. 5 ). 32 denotes a waterproof, removable plug.

That in the Figures 5 to 7 shown embodiment of the wall-mounted cistern according to the invention differs from that above with reference to Figures 1 to 4 described embodiment in that the dimensionally stable shell is produced by blow molding as a one-piece box-shaped shell 20 '. The box body 1.1 of the cistern 1 is inserted into the box-shaped shell 20 'together with the flush pipe 4 attached to it via an opening 20.8 on the top side of the box-shaped shell 20 '. The top opening 20.8 of the shell 20', which serves as leak protection, is then closed with a lid 20.9. The cistern body 1.1 inserted into the shell 20' can be pushed within the shell 20' in the direction of the inspection box element 21 formed on the front wall 20.4 of the shell 20'. This can be done before or after attaching the cover 20.9.

The lid 20.9 is connected to the box-shaped shell 20 'in a watertight manner. For this purpose, the shell 20' can be provided with a circumferential seal at its top opening 20.8. Furthermore, the lid 20.9 can be detachably connected to the box-shaped shell 20', for example by means of clamping means and/or locking means.

The implementation of the invention is not limited to the exemplary embodiments described above. Rather, numerous variants are conceivable, which are covered by the subject matter of the attached claims.

Claims (15)

Wall-mounted cistern (1) for a sanitary basin, in particular a toilet or urinal basin, with a box body (1.1) which has an inspection opening (12) on its front or top, a water inlet connection (11), a flushing pipe (4) for directing Rinsing water from the box body (1.1) to the sanitary basin, and a leakage protection (19), which is designed as a dimensionally stable and water-impermeable shell (20, 20 '), which at least partially surrounds the box body (1.1) and the flushing pipe (4) and has an opening ( 21), characterized in that the opening (22) of the shell (20, 20 ') has an opening width that is smaller than the width of the box body (1.1), the opening (22) of the shell at least partially with the inspection opening (12) of the box body (1.1) lies in overlap and is provided with a dimensionally stable inspection box element (21), the circumferential wall (21.2) of which is impermeable to water and is connected to the shell in a water-impermeable manner. Wall-mounted cistern according to claim 1, characterized in that the shell (20, 20') has an elongated, tubular, substantially vertically extending section (20.2) which at least partially surrounds the flush pipe (4). Wall-mounted cistern according to claim 2, characterized in that the elongated, tubular section (20.2) has at its lower end a substantially horizontally extending pipe socket (20.30) which projects forward from the elongated, tubular section (20.2). Wall-mounted cistern according to one of claims 1 to 3, characterized in that the shell (20, 20') has a box-shaped section (20.1) which at least partially surrounds the box body (1.1). Wall-mounted cistern according to claim 4, characterized in that the box-shaped section (20.1) of the shell (20, 20 ') in its front wall (20.41) and / or rear wall (20.51) viewed from the outside has at least two, preferably at least three recesses (24 ), preferably has elongated depressions (24) that run essentially parallel to one another. Wall-mounted cistern according to claim 4 or 5, characterized in that the box-shaped section (20.1) of the shell (20, 20 ') has one or more beads (25) in its front wall (20.41) and / or rear wall (20.51), which extend into a bottom (20.3) of the box-shaped section (20.1) of the shell (20, 20 '). Wall-mounted cistern according to claim 6, characterized in that the beads (25) are designed such that they are at a distance from the inside of the opposite rear wall (20.51) or front wall (20.41) of the box-shaped section (20.1) of the shell (20, 20 ') end up. Wall-mounted cistern according to one of claims 1 to 7, characterized in that the shell (20, 20 ') has an average wall thickness in the range of 0.8 mm to 2.5 mm, preferably in the range of 1.0 mm to 2. 2 mm, particularly preferably in the range from 1.4 mm to 2.0 mm. Wall-mounted cistern according to one of claims 1 to 8, characterized in that the shell (20, 20') has at least one, preferably at least two fastening elements (27) for fastening the shell (20, 20') to a mounting frame (2). , wherein the fastening elements (27) preferably protrude from narrow sides of the shell (20, 20 '). Wall-mounted cistern according to one of claims 1 to 9, characterized in that the inspection box element (21) has at its projecting end a closed end wall (21.1) which can be removed by means of a cutting process or cutting tool. Wall-mounted cistern according to one of claims 1 to 10, characterized in that the shell (20) is composed of a rear shell part (20.5) and a front shell part (20.4), each of the shell parts (20.4, 20.5) defining a cavity section. Wall-mounted cistern according to claim 11, characterized in that the shell parts (20.4, 20.5) have mutually facing connecting edges or connecting flanges (20.42, 20.52) which are connected to one another in a watertight manner. Wall-mounted cistern according to claim 12, characterized in that a seal (26), preferably a circumferential seal (26), is arranged between the connecting edges or connecting flanges (20.42, 20.52). Wall-mounted cistern according to one of claims 11 to 13, characterized in that the shell parts (20.4, 20.5) are screwed and/or glued together and/or connected by means of clamping means. Wall-mounted cistern according to one of claims 1 to 10, characterized in that the shell (20 ') is produced by blow molding as a one-piece box-shaped shell (20'), the box body (1.1) of the wall-mounted cistern together with the flush pipe attached to it (4) is introduced into the box-shaped shell (20 ') via a top opening (20.8), and the top opening (20.8) of the shell (20') is closed with a lid (20.9).

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