EP1936048B1 - In-wall cistern with cascaded cistern body construction - Google Patents

Abstract

The cistern (1) has a box body (1.1) and a separately manufactured flush cistern cover (2), where the box body has a base and a wall section is formed as a single piece with the base. The wall section of the box body is formed in a form of steps, such that the box body is expanded from its base to its upper container edge in the form of steps. Another box body is inserted into the box body with one-third of its height. An access opening (1.15) is formed in an upper area of a front wall of the box body.

Description

The invention relates to a concealed cistern for a toilet bowl or the like, with a box body and a separately produced cistern lid, wherein the box body has a bottom and integrally formed thereon, upwardly extending, an upper container edge defining wall sections.

Cisterns for toilet bowls are nowadays preferably installed as concealed cisterns in wall installations. Conventional concealed cisterns usually consist of a one-piece plastic container, which is provided with a side opening for a water connection, a drain pipe and at least one inspection opening for mounting or repair of arranged in the plastic container components, such as the filling valve and the drain valve. Furthermore, two-part concealed cisterns are known. The plastic container known flush-mounted cisterns are usually produced by blow molding or injection molding. However, the production costs of conventional concealed cisterns are often unsatisfactory.

From the document GB 2,283,767-A a concealed cistern is known that is stackable with a same concealed cistern.

The present invention has for its object to provide a stable concealed cistern, the relatively low production costs caused and can be mounted quickly and easily.

This problem is solved by a concealed cistern with the features of claim 1.

The concealed cistern according to the invention comprises a box body and a separately produced cistern lid, wherein the box body has a bottom and integrally formed thereon, upwardly extending, an upper container edge defining wall sections. Furthermore, the flush-mounted cistern according to the invention is characterized in that the wall portions of the box body are step-shaped, such that the box body from its bottom to its upper edge of the container stepwise widened and a second, equally trained box body with at least one third of its height in the box body is pluggable.

The step-shaped design of the box body allows a space-saving mating of several box bodies, which simplifies the storage and transport within the production and offers a corresponding cost savings. The stepped structure of the box body also improves its bending strength and thus the stability. The higher bending strength achieved by the stepped structure even allows, if appropriate, a certain reduction of the wall thickness of the box body without causing a critical stability loss. A reduction of the wall thickness of the box body with constant stability due to the step-shaped design of the Box body walls leads to material cost and weight savings. In addition, the flush-mounted cistern according to the invention can be installed quickly and easily, since prior to the attachment of the cistern lid to the box body whose interior is easily accessible for mounting the components to be installed.

An advantageous embodiment of the concealed cistern according to the invention is that in the upper region of the front wall of the box body an inspection opening is formed. The inspection opening offers in the installed state of the concealed cistern access to the components arranged therein. As is well known, coupled to an actuator plate power transmission elements to trigger a purge through the inspection opening in the cistern.

Due to the arrangement of the inspection opening in the upper region of the front wall of the box body, the greatest possible geodetic height for a high flushing capacity can be achieved for a given height of the wall wall installation. The cistern lid or the front wall of the box body facing portion of the cistern lid can be made very flat. In addition, in this embodiment, compared to a two-part cistern, the inspection opening is formed in a front wall of the cistern lid, by the separation of box body and cistern lid above the access opening in the subsequent assembly of the actuator plate a Aufklaffen to weakened, the inspection opening surrounding areas avoided. This is advantageous for the stability and tightness of the concealed cistern.

In a further advantageous embodiment of the concealed cistern according to the invention it is provided that the cistern lid is connectable or connected to the box body by a clip connection. The combination of cistern lid and box body can be done very easily and quickly in this case. Preferably, the clip connection is designed as not visible from the outside and / or as non-releasable clip connection.

A further advantageous embodiment of the concealed cistern according to the invention is that the box body has at its front a bulge to use the existing between the front vertically arranged profiles of a pre-wall installation space for the Spülkastenvolumen. For a given flushing cistern volume, the largest possible cistern width and the greatest possible geodetic height, a minimum wall depth can be achieved.

A further advantageous embodiment of the concealed cistern according to the invention is characterized in that the cistern lid on the upper side has a parallel to the front of the cistern gutter extending substantially over the entire width of the concealed cistern. The channel serves to receive a leading to the water connection of the cistern water supply and ensures that with a corresponding arrangement of the water supply the the greatest possible geodetic height of the concealed cistern remains usable within the pre-wall installation. In particular, the channel allows a so-called grinding of the water supply, ie a guide the water pipe to the cistern and a continuation of cistern - without stub - to the next consumer, such as an inlet fitting a washbasin.

In accordance with the stepped structure of the box body, the channel also improves the bending strength of the cistern lid.

According to a further advantageous embodiment of the concealed cistern according to the invention an opening for receiving a water connection is formed in the upper region of at least one side wall of the box body, wherein in the top of the cistern lid at least one further opening for receiving the water connection is formed. The additional opening for receiving the water connection at the top of the cistern lid facilitates the installation of the water connection in difficult installation situations.

The additional opening for receiving the water connection is preferably arranged in a recess of the cistern lid. The flush-mounted cistern according to the invention can thus be arranged directly below the top cover of a wall installation in the wall installation, so that at predetermined dimensions of the wall installation a maximum geodetic height for the purpose of high flushing performance is achieved. When arranging the water connection on the provided in the recess opening of the cistern lid results in no lower position of the concealed cistern.

Further preferred and advantageous embodiments of the concealed cistern according to the invention can be found in the dependent claims, the following description and the accompanying drawings.

Fig. 1

eine Vorderansicht eines Unterputzspülkastens, dessen erfindungsgemäß ausgebildeter Kastenkörper mit einem Schwitzwasserschutz ummantelt ist;

Fig. 2

eine Seitenansicht der linken Seite des Unterputzspülkastens der Fig. 1;

Fig. 3

eine Draufsicht des Spülkastens der Fig. 1;

Fig. 4

eine Rückansicht des Spülkastens der Fig. 1;

Fig. 5

eine Schnittansicht eines Abschnitts des Spülkastendeckels und des Kastenkörpers im Bereich einer Revisionsöffnung;

Fig. 6

eine Vorderansicht des Spülkastens der Fig. 1, wobei dessen Spülkastendeckel noch nicht mit dem Kastenkörper verbunden ist;

Fig. 7

eine Seitenansicht der linken Seite des Spülkastens mit abgehobenem Spülkastendeckel entsprechend Fig. 6;

Fig. 8

eine Vorderansicht von zwei zusammengesteckten Kastenkörpern zweier erfindungsgemäßer Unterputzspülkästen;

Fig. 9

eine Schnittansicht der beiden zusammengesteckten Kastenkörper entlang der Linie A-A der Fig. 8;

Fig. 10

eine Seitenansicht der beiden zusammengesteckten Kastenkörper der Fig. 8.

The invention will be explained in more detail with reference to a drawing illustrating an exemplary embodiment. Show it:

Fig. 1

a front view of a concealed cistern whose inventively designed box body is covered with a condensation protection;

Fig. 2

a side view of the left side of the concealed cistern of the Fig. 1 ;

Fig. 3

a plan view of the cistern of Fig. 1 ;

Fig. 4

a rear view of the cistern of the Fig. 1 ;

Fig. 5

a sectional view of a portion of the Spülkastendeckels and the box body in the region of a revision opening;

Fig. 6

a front view of the cistern of the Fig. 1 Whose cistern lid is not yet connected to the box body;

Fig. 7

a side view of the left side of the cistern with lifted Spülkastendeckel accordingly Fig. 6 ;

Fig. 8

a front view of two assembled box bodies of two inventive concealed cisterns;

Fig. 9

a sectional view of the two assembled box body along the line AA of Fig. 8 ;

Fig. 10

a side view of the two assembled box body of Fig. 8 ,

The cistern 1 shown in the drawing is intended for wall mounting, in particular for installation in a wall installation. The cistern 1 consists of a box body 1.1 and a separately made cistern lid 2. Box body 1.1 and cistern lid 2 are made of plastic injection molded parts.

The cistern lid 2 is connected to the box body 1.1 by a clip connection. The clip connection is realized by elongate recesses 1.11 in the box body and associated latching lugs 2.1 on the cistern lid 2. The recesses 1.11 are formed in the outer sides of the front wall 1.12 and rear wall 1.13 of the box body 1.1 at a small distance from the respective upper edge of the front wall or rear wall (cf. Figures 5 . 6 and 8th ).

The cistern lid 2 engages over the box body 1.1. He is accordingly slightly wider and slightly deeper than the upper portion of the box body 1.1 formed. The recesses 11.1 associated latching lugs 2.1 are formed on the inner sides of the downwardly angled edge 2.2 of the cistern lid 2 (see. Fig. 5 ).

The clip connection is designed as a non-detachable clip connection and in the assembled concealed cistern 1 according to the FIGS. 1 to 4 not visible from the outside.

In the upper part of the box body 1.1 are laterally projecting tabs 1.14 with mounting holes for mounting the cistern 1 to a front wall frame (not shown) formed. The fastening tabs 1.14 are arranged on the front side of the box body 1.1. Further, in the upper portion of the front wall of the box body 1.1, an inspection opening 1.15 is recessed over the components (not shown) disposed in the box body 1.1, e.g. the filling valve or drain valve assembly is accessible for repair or maintenance.

The inspection opening 1.15 is surrounded by a protruding at the front of the box body 1.1 frame 1.16, which is provided with locking elements 1.17 for attaching an actuator plate (not shown) or a revision shaft (not shown).

In the inspection opening 1.15 present a plate-shaped cover 1.40 is used, which with openings is provided for actuators of an actuator plate. Below the inspection opening 1.15 of the box body 1.1 is covered with a condensation protection 1.18 made of polystyrene.

As in particular in Fig. 3 it can be seen, the cistern 1 at its front a bulge 1.19 to use between the front vertical profiles (supports) of a frame-like pre-wall installation existing space for the Spülkastenvolumen. The use of this interspace serves to minimize the depth of the pre-wall installation. For a given cistern volume of, for example, 9 liters, the largest possible Spülkastenbreite and the greatest possible geodetic height can be achieved by the front bulge of the cistern 1 1.19 a minimum wall depth. The bulge 1.19 is realized by opposite the plane of the mounting straps 1.14 obliquely angled forward front wall sections 1.20.

In the bottom 1.24 of the box body 1.1, a drain opening is formed on which a vertical outlet pipe 1.21 is formed. The water supply takes place via a water connection 3, which is mounted on a lateral opening 1.22 of the box body 1.1. In the exemplary embodiment illustrated here, the lateral opening 1.22 for the water connection 3 is formed in the upper region of the left side wall 1.23 of the box body 1.1 viewed from the front of the cistern 1.

The upwardly extending wall portions of the box body 1.1 are integrally formed on the bottom of 1.24 and define an upper container edge 1.25. The wall sections are step-shaped, in such a way that the box body 1.1 is widened in steps from the base 1.24 to the upper container edge 1.25. The step-shaped widening of the box body 1.1 makes it possible to assemble several, identically designed box body 1.1 for storage and / or transport during production of the flush-mounted cistern according to the invention to save space.

The mating of several box bodies 1.1 is in the illustrated embodiment, however, only possible if the box body is not provided with the Schwitzwasserschutz 1.18 and the water connection 3. The water connection 3 is formed from a connecting piece, a clamping flange and a union nut 3.1. It can be mounted and dismantled manually without tools on its associated opening 1.22 of the box body 1.1.

The step-shaped widening of the box body 1.1 is formed in its front wall 1.12, rear wall 1.13 and side walls 1.23, 1.28 by corresponding paragraphs 1.29, 1.30, 1.31. The paragraph 1.23 of the front wall 1.12 is higher than the paragraph 1.30 of the rear wall 1.13 (see. FIGS. 9 and 10 ).

In the example shown here, the step-shaped widening of the box body 1.1 in terms of height is designed so that a second, the same trained Box body 1.1 with at least one third of its height in the other box body 1.1 can be inserted.

The cistern lid 2 has on its upper side a recess 2.3, in which a further opening for the alternative recording of the water connection 3 is formed. The water connection 3 can thus be mounted after loosening of the side wall 1.23 without accessories from the top of the cistern lid 2.

The indentation 2.3 is arranged between the inspection opening 1.15 and the opening for the water connection 3 having side wall 1.23 of the cistern 1. The indentation 2.3 comprises a substantially flat base 2.31, in which the opening for receiving the water connection 3 is arranged. How the particular Figures 3 and 4 show the indentation 2.3 at the back of the cistern lid 2. In contrast, the recess 2.3 ends opposite the front wall 1.12 of the cistern 1 at a distance.

In particular in Fig. 7 It can be seen that the upper edge 1.26 of the box body rear wall 1.13 is lower than the top edge 1.27 of the box body front wall 1.12. The upper edges 1.32 of the two box body side walls 1.23, 1.28 extend from the upper edge 1.27 of the front wall 1.12 substantially obliquely downward to the upper edge 1.26 of the rear wall 1.13. The cistern lid 2 accordingly has obliquely downwardly extending lower edges 2.4, which merge into a rear wall 2.51 of the cistern lid 2.

The additional opening in the cistern lid 2 for alternately receiving the water connection 3 is provided with a removable closure 2.6. The closure 2.6 is lid-shaped and molded onto the cistern lid 2. It has a flexible tab 2.61, via which it is integrally connected to the cistern lid 2. Alternatively, the closure 2.6 can also be sprayed on the box body 1.1 via a flexible tab.

On its underside, the lid-shaped closure 2.6 has an annular collar (not shown). The collar is formed undercut on its outer circumference, so that the closure 2.6 can be locked in a form-fitting manner into the respective opening (eg opening 1.22) associated with the water connection 3. Outside the blade, the closure lid 2.6 has a pin, which is plugged into a hole 1.33 arranged next to it when closing the opening (1.22) (cf. Fig. 9 ). In Fig. 3 the opening arranged in the recess 2.3 is closed by the closure 2.6 molded onto the cistern lid 2.

The closure 2.6 can be separated from the cistern lid 2 by, for example, the tab 2.61 is severed with a knife. The opening 1.22 for the water connection 3 in the side wall 1.23 of the box body 1.1 can then be closed with the lid-shaped closure 2.6.

The cistern lid 2 has at its top inclined surfaces 2.81, 2.82, which are inclined to the side walls 2.52, 2.53 out. Furthermore, the cistern lid 2 has on its upper side a substantially horizontal surface section 2.83, which adjoins the front edge of the lid 2, and a rear surface section 2.84, which is inclined towards the rear wall 2.51. In the top of the cistern lid 2 also an elongated trough (groove) 2.85 is formed, which serves to accommodate a water supply line (not shown) which except with the water connection 3 of the cistern 1 with at least one other consumer, for example with a washbasin inlet fitting can be connected.

The gutter 2.85 extends substantially over the entire width of the cistern 1 and runs parallel to the rear wall 2.51 of the cistern lid 2. The trough 2.85 crosses the recess 2.3, the base 2.31 is lower than the bottom of the trough 2.85.

The embodiment of the invention is not limited to the embodiment described above. Rather, a variety of variants are possible, which are described in the dependent claims.

Claims (12)

1. An in-wall cistern (1) for a toilet bowl or the like, comprising a cistern body (1.1) and a cistern cover (2) produced separately, said cistern body comprising a bottom as well as wall sections formed integrally and extending upwards and defining a container top edge,
   characterized in that the wall sections of the cistern body are formed in steps so that the cistern body is expanded in steps from its bottom towards its container top edge, and a second cistern body (1.1) formed in the same manner can be inserted into the cistern body (1.1) with at least one third of its height.
2. The in-wall cistern according to claim 1,
   characterized in that an inspection opening (1.15) is formed in the top area of the front wall (1.12) of the cistern body (1.1).
3. The in-wall cistern according to claim 2,
   characterized in that the inspection opening (1.15) is surrounded by a frame (1.16) projecting from the front of the cistern body (1.1), said frame being provided with locking elements (1.17) for attaching an operating plate or an inspection chamber.
4. The in-wall cistern according to one of claims 1 to 3,
   characterized in that the cistern cover (2) is connectable or connected to the cistern body (1.1) by means of a clip connection.
5. The in-wall cistern according to claim 4,
   characterized in that the clip connection is in the form of a non-detachable clip connection.
6. The in-wall cistern according to claim 4 or 5,
   characterized in that the clip connection is in the form of a clip connection invisible from the outside.
7. The in-wall cistern according to one of claims 1 to 6,
   characterized in that the cistern body (1.1) comprises a bulge (1.19) in its front.
8. The in-wall cistern according to claim 7,
   characterized in that the bulge (1.19) is created by front wall sections (1.20) extending at a slanted angle towards the front.
9. The in-wall cistern according to one of claims 1 to 8,
   characterized in that the cistern cover (2) comprises a channel (2.85) extending parallel to the front and substantially over the entire width of the in-wall cistern.
10. The in-wall cistern according to one of claims 1 to 9,
    characterized in that the top edge (1.26) of the rear wall (1.13) of the cistern body (1.1) is at a position lower than the top edge (1.27) of the front wall (1.12) of the cistern body (1.1).
11. The in-wall cistern according to one of claims 1 to 10,
    characterized in that in the top area of at least one side wall (1.23) of the cistern body an opening (1.22) for receiving a water supply (3) is formed, and in that in the top of the cistern cover (2) at least one further opening for receiving the water supply (3) is formed.
12. The in-wall cistern according to claim 11,
    characterized in that said at least one opening for receiving a water supply (3) formed in the cistern cover (2) is provided with a detachable cover (2.6).

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