DE102004048992B4 - Drainage device for sanitary basins and use of the drainage device in a sink - Google Patents

Abstract

Drainage device for sanitary basins, comprising a drain port (1), insertable into the drain port insert body (4) and a collecting device (10), wherein on the inner wall of the drain port a shoulder (3) or projections are provided and the insert body in the drain port on the The insert body (4) has radially projecting, axially extending and serving to guide the insert body on the inner wall of the discharge nozzle (1) wing (7), further wherein the collecting means (10) on the wings of the Insert body (4) is releasably secured and wherein the collecting device (10) has an upper, inwardly cantilevered edge (9) which in corresponding notches (8) in the wings (7) of the insert body (4) can be latched.

Description

The invention relates to a drainage device for sanitary basins, in particular sinks, which is preferably used in a facility of the health service, such as a hospital, and a use of the drainage device in a sink.

In health care facilities, only drainage devices that minimize the risk of the formation and accumulation of germs may be used in Germany for hygienic reasons. Therefore, such basins must also have no overflow facilities, as they are rarely flushed through and then not cleaned. For the same reason, the sinks in these facilities should also have no closing devices in the drainage area. Rather, only devices are provided there with which the accidental introduction of objects is prevented in the drain. For this purpose, a cap is generally provided over the actual drain opening, which is rigidly mounted at a small distance above the opening. Through the gap between the pelvic floor and the cap running water can pass through it. However, objects are held back by the narrow gap.

For the retention of objects, various proposals have been made:
In DE 93 03 281 U1 For example, a dirt trap for shower and bath tubs and sink is described, which is equipped with mechanical lifting plugs. Here, the strainer is firmly connected to the stopper mechanism by using a cylindrical strainer extending downwardly from the outer edge of the stopper, so that the drainage of the service water when lifting the stopper and thus the sieve by means of a conventional lever joint runs through the sieve.

Furthermore, in US Pat. No. 6,088,843 a sieve for a drain neck with a brush extension described. The sieve can be suspended, for example hanging down in the drain neck, with the brush extension is below the screen. The screen is, for example, cylindrical in the upper area and tapered downwards in the lower area. The sieve can also be cylindrically shaped over the entire height. It has relatively large openings, so that only grolle be retained in the drainage reaching parts. Smaller impurities, such as hair, are retained by the brushes.

Furthermore, a cup-shaped sieve for a drain valve is also made EP 0 409 400 B1 known. The outlet drain plug described therein serves to seal an inlet of a discharge spout, wherein the plug is reciprocated with an actuator. The strainer attached to the bottom of the drain plug serves to catch small parts entering through the inlet into the drain spigot and for this purpose stands in close-fitting free-sliding engagement with the wall of the drain spigot. The screen has a disc-shaped horizontal bottom wall with a plurality of relatively small openings through which water can drain from the screen without loss of small objects held up by it.

Furthermore, it is off US Pat. No. 6,023,795 A an outlet arrangement for a sink known. In this case, the drainage arrangement comprises a plug and a sieve, wherein the sieve is arranged cylindrically and below the stopper in the outflow nozzle. In the area of the axis of the mesh screen, a passageway is provided through which a lever linkage can be guided to move the drain plug up and down.

Despite the use of a sieve for retaining contaminants, as in DE 93 03 281 U1 . US Pat. No. 6,088,843 . EP 0 409 400 B1 and US Pat. No. 6,023,795 A In particular, for drainage devices for sanitary basins in health care facilities, especially in hospitals, there is the problem that deposits form on the inner walls of the drainage spout which may be foci for the propagation of germs. Such deposits can originate, for example, from suspended dirt residues and from soap residues. Experience has shown that these impurities form a layer that covers the stub wall and the built-in parts in the outlet stub.

Therefore, there is a need to remove these deposits. To ensure a sufficiently safe sterility, the nozzle would have to be cleaned frequently. Even if such dangers should not exist, for example in private households, where normally no more illnesses have to be reckoned with, there is of course also the problem that these impurities disturb because they can make themselves felt by an unpleasant odor.

However, the cleaning of the conventional drain pipe is not readily possible because, for example, built-in parts in the drainage pipe impede mechanical cleaning. A dry cleaning remedy is in many cases not sufficient and because of the environmental impact anyway unacceptable. The aforementioned built-in parts are, for example, the lever linkage for lifting and lowering the drain plug are needed and other fasteners which are provided in the drain neck, such as to attach a flow obstruction. If, as in the case of one of the embodiments in US Pat. No. 6,023,795 A However, there is also the problem that such plugs are easily lost and therefore need to be replaced again and again, so that a lever linkage for raising and lowering the plug is not required. For this reason, such a solution is already disadvantageous from the outset. In addition, the said embodiment in US Pat. No. 6,023,795 A in the lower part of the discharge nozzle, a constriction, so that there or from there downstream deposited impurities can not be removed.

Out CH 451 034 A a closable liquid drain is described with stored in the valve hole valve seat, wherein the holder of the valve seat is effected by a central screw on a web, which is releasably secured in the drain fitting. It is stated that a sieve could hang on the web, which serves to catch foreign objects that have entered the overflow channel.

In DE 90 11 285 U1 Furthermore, a drain fitting is described which consists of a valve body with closure mechanism, insert body with sealing plug and Restefangsieb, overflow and drain connection.

DE 33 17 657 A1 further indicates a spout fitting for a bathtub or the like. This fitting has a hollow body, in which there is also an insert part, which forms a part-spherical seat, in which the plug is captively mounted. It is stated that the insert member may form a grid disposed below the plug to prevent accidental loss of items through the drain fitting.

WO 2003/071 038 A1 describes a drain with a removable strainer in an area in a sleeve below the cap-receiving base.

Out US 4,380,834 A shows a drainage system, which has a drain connection, a plunger insertable into the drain and a perforated sleeve. The sleeve sits on top of the system. The plunger has radially projecting, axially extending and serving to guide the insert body on the inner wall of the drain neck wings. The sleeve is releasably secured to the wings.

These problems are solved by the drainage device for sanitary basins according to claim 1 and their use in a sink according to claim 10. Preferred embodiments of the invention are specified in the subclaims.

The drainage device according to the invention is used in particular in a sink, especially in a hand basin and in kitchen sinks, for example, glass basin. However, other uses are conceivable, especially bathtubs, shower trays and bidets. The device is particularly suitable for applications in a healthcare facility.

The device according to the invention comprises a discharge nozzle with a shoulder provided on the inner wall of the discharge nozzle, as well as an insert body and a collecting device, for example a sieve. The insert body preferably has an axial shaft and a cap arranged at the upper end of the shaft. The insert body is deductible in the drain neck on the heel.

By the chosen construction, it is possible over the aforementioned known devices to mechanically clean the drain nozzle after manually removing the insert body and the catcher. For this purpose, known cylinder brushes can be used, such as those used in the home. Since the drain is usually straight, cleaning is easily possible. As a result, the required in healthcare facilities sterility can be easily guaranteed. Since the insert body is only offset on the heel in the drain neck, it can be easily removed from the drain neck to perform the cleaning. The same applies to the collecting device. Because of the easy disassembly and assembly of the insert body and the catcher, the drain can also be easily cleaned often, so that the accumulation of germs and sources of unpleasant odors can be nipped in the bud.

In order not to hinder the free flow of water unnecessarily, the insert body for attachment or support on the shoulder in the drain neck radially projecting, axially extending and serving to guide the insert body on the inner wall of the drain neck wings, which in corresponding recesses in the Intervene or rest on this. By the wings, a sufficient distance between the inner wall of the drain neck and the insert body is released. At least three such wings, for example three, four or five wings, can be provided in order to provide the insert body with the required mechanical stability in the outlet connection to rent. The wings should as far as possible parallel, preferably axially parallel, have to the cylindrical wall of the discharge nozzle extending end edges and be formed so that they are at least over part of their front edges in closely fitted freely sliding operative connection. As a result, the insert body can be easily inserted into the drain connection and removed again, wherein it is seated virtually free of play in the seat. The front edges can be stepped in particular for resting on the heel or for engaging in recesses in the heel. The steps are, for example, designed such that the respective upper wing part rests above the step on the wall of the drain neck and the wings on the steps taper downwards, wherein the end edges in the lower region preferably also run parallel to the axis. The wings may also be provided with projections which engage for example in the recesses in the paragraph or rest on the paragraph. In a preferred embodiment, the wings may in turn have lugs for fastening the insert body in the outlet nozzle, which engage in correspondingly shaped recesses in the projections in the outlet nozzle bayonet-like. For this purpose, the insert body with these preferably tangentially on the wings outwardly extending lugs is inserted into the drain port that he locks there. For this purpose, the lugs may be formed on the wings on the insert body to match the corresponding recesses in the shoulder in the drain neck, such as wedge-shaped or conical noses that can be inserted into matching wedge-shaped or conical recesses.

By the seat of the insert body on the wing on the heel a bridge-like construction is formed (suspension bridge system). The heel may be designed as a step-like narrowing of the drain neck at this paragraph. For example, a narrow narrowing in the axial direction may be provided, or a constriction extending downwards over the entire further course of the discharge nozzle. The shoulder may be formed in particular circumferentially on the inner wall of the drain neck. Instead of a circumferential shoulder may alternatively be provided at suitable locations on the inner wall of the drain neck projections mounted on which the insert body is attached or on which it rests. The projections may also have recesses into which the insert body engages with suitable wings.

The collecting device is preferably cup-shaped. The cup-shaped catcher is inserted with the opening upwards in the drain neck. The side walls of the collecting device may, in a preferred embodiment, taper at least partially downwards. But at least part of the collecting device may also be cylindrical. The conical shape of the flow of water through the sieve is significantly accelerated, because then not only on the bottom surface of the sieve can drain water, but also on the much larger side surfaces. The conicity creates a space between the screen side surface and the wall of the outlet connection, thus allowing lateral drainage.

The collecting device, which is preferably designed as a sieve, can in particular consist of a perforated and / or of a gauze-like material. Such materials are known per se. Usually plastic can be used, for example polyvinyl chloride, polyethylene, polypropylene, polyphenylene oxide, polyamide or mixtures or copolymers of these compounds. Of course, the catcher may also be made of metal, such as stainless steel or aluminum. The hole size and the mesh size of the collecting device must be adapted to the required flow rate. This is u. a. To take into account the total area of the catcher as well as the desired minimum size of remaining parts in the catcher. Too large a hole diameter would simply pass too large objects, while too narrow a mesh size could quickly lead to blockage. For example, perforated screens with holes about 1.5 mm in diameter may be suitable. For example, the mesh size may be in the range of 10-100 mesh (U.S. Of course, a perforated material can be used, which is additionally combined with a fabric. The perforated material then provides the required mechanical stability. Instead of the perforated material, a basket consisting of webs can also be used for mechanical stabilization.

The collecting device is releasably secured to the insert body. As a result, the collecting device can be taken out of the discharge nozzle together with the insert body. The catcher can then be removed from the insert body and either cleaned or discarded separately. If the collecting device is constructed in a simple manner and made of inexpensive material, just the latter alternative is preferable. For releasably securing the collecting device on the insert body, it is attached to the wings. For this purpose, the collecting device on an upper, inwardly cantilevered edge, which can be latched into corresponding notches in the wings of the insert body. Such notches may be on the end edges of the wings, in particular immediately below the steps located, which are provided for supporting the insert body on the paragraph in the drain neck.

The inwardly cantilevered edge may be formed in particular circumferentially. As a result, the collecting device can be locked in any rotational position on the insert body. In order to lock the catcher on the wings of the insert body, the edge should be made of a flexible material, such as plastic or spring steel. When snapping into the notches, the edge deforms elastically.

The collecting device can be used both for collecting objects that accidentally get into the drain. But it can also serve to absorb substances that dissolve in the running water optionally and thereby have a disinfecting effect or constantly spread a pleasant scent. Such substances are known, for example, as disinfectant tablets or as scented stones, for example for hanging in toilet bowls.

To use the drainage device in sinks, which are used for example in hospitals, they have a rigidly attached to the shaft with the wings cap, so that the outlet nozzle can not be closed. Of course, however, embodiments are conceivable in which the outlet nozzle can be sealed against the outflow of water. For this purpose, the cap of the insert body can serve in particular as a sealing plug by this is designed to be movable in the axial direction and in an open position and in a closed position latched (push-button closure). To close the stopper is pressed onto the upper drain flange of the discharge nozzle or pressed into the outlet nozzle, such as by hand or with the foot, and snaps there, preferably under spring force, so that the drain nozzle is securely sealed against escaping water. For reopening the plug is brought into a raised position, for example, by re-applying axial force application to the plug, so that it is brought from the locked position in the closed position in an open position and engages there. For reliable closing of the discharge nozzle, the sealing plug can have a circumferential sealing lip, for example of rubber, on the circumference.

The insert body may for this purpose have a push button with which the open and the closed position of the plug are defined. The pushbutton can be provided instead of the shaft in the insert body. In most cases, the push button will have a spring shaft and a locking cylinder extending axially against the spring shaft in the spring shaft, the locking cylinder being connected to the sealing plug and the spring shaft being fastened or resting on the wings of the insert body. Due to the relative movement of the locking cylinder relative to the spring shaft mounted in the discharge nozzle, the lifting movement of the sealing plug is made possible for opening and closing. In order to enable a locking of the locking cylinder in the spring shaft and thus of the sealing stopper in the two locking positions "closed position" and "open position", a mechanism may be provided as in a ballpoint pen with a rotary cylinder with tooth-shaped projections and corresponding tooth-shaped recesses in a guide cylinder for the rotary cylinder , Such a principle is for example in US 6,195,819 B1 shown. Other embodiments for a push button are in DE 20 2004 005 266 U1 described.

The metallic parts of the drainage device are preferably made of brass, polished and chrome plated. This concerns both the neck, the insert body and other parts. However, a downwardly adjoining sewage pipe is preferably made of chromed steel. Seals between the individual parts may for example consist of rubber or silicone elastomer. Such seals are provided for example between the drain flange of the drain spout and the sanitary basin inside and between the pelvic underside and a serving to fix the nozzle in the basin lock nut. Of course, other common sealing materials, for example, be used on glands, such as Teflon tape or tow.

Furthermore, the drainage device for use in other cases than in sinks, for example, in hospitals also be equipped with openings in the outlet nozzle, which are used for the return of originating from an overflow channel water. These openings are usually provided below the upper flange of the discharge spout and communicate with a cavity in the basin into which overflowing water can flow.

The drainage device may conventionally comprise a sewer pipe, a closure nut which can be screwed onto an external thread located in the lower region of the drain neck and a seal between the closure nut and the bottom of the basin. The lock nut is used to mount the drain spigot in the basin. For this purpose, the nozzle is inserted into the drainage opening of the basin, wherein in addition a seal can be inserted between the upper drain flange of the nozzle and the bowl inner side. The nozzle is then attached to the pelvis from below with the lock nut. Between the basin underside and the lock nut also a seal and possibly a press ring are used. In order to produce a secure connection of the drainage nozzle below the sanitary basin with a sewage pipe which is sufficiently liquid-tight, the closure nut may be formed as a downwardly extending connecting pipe piece which is connectable to the sewage pipe. The sewage pipe is then in turn screwed, for example by means of a union nut on an external thread in the lower region of the connecting pipe piece, in which case a seal between the abutting surfaces of the connecting pipe piece and the sewer pipe is used. by screwing this piece of pipe with its internal thread on the external thread of the discharge nozzle, in the cavity of the basin accumulating water optionally passes through the thread between the outlet nozzle and the connecting pipe piece in the interior of the discharge nozzle over.

For the following explanation of the invention reference is made to the figures described below. They show in detail:

1 : a schematic representation of the drainage device according to the invention in a first embodiment in section;

2 a section through a detail at the engagement of a trained as a sieve receiving device on the insert body;

3 FIG. 2: a section through the device according to the invention along the section line AA according to FIG 1 ;

4 a schematic representation of a drainage device in a non-inventive embodiment in section;

5 : A schematic representation of the trained as a sieve catcher in the non-inventive embodiment in section.

Like reference numerals in the figures indicate like elements.

In 1 a schematic representation of a discharge device according to the invention is shown in a first embodiment. The drainage device has a cylindrical outflow nozzle 1 on, which can be used in a drain hole in a sanitary basin. At the bottom of the drain 1 is usually externally threaded, so that a further downwardly leading nozzle with a union nut can be screwed from below when the nozzle 1 inserted into the pelvis (not shown). In the same way, in this case for liquid-tight connection, a connecting pipe piece with its internal thread on this external thread of the drain neck 1 be screwed and the sewer pipe turn with the union nut on an external thread in the lower part of the connecting pipe piece (also not shown). The drain neck 1 has at its upper end a drain flange 2 on whose lower surface it can be pressed onto the inside of the basin. For this purpose, a seal, for example, a silicone or rubber seal is used to prevent water between the drain flange 2 and can pass down the pelvis.

The inner wall of the drain neck 1 is stepped, so that a paragraph 3 forms. Of course, this paragraph also by a projection on the inner wall of the drain neck 1 formed below the paragraph 3 springs back, leaving the wall of the drain 1 in the lower area is just as thick as in the upper area.

On this paragraph 3 sits an insert body 4 on. The insert body has in this case a shaft 5 on, which is in the form of a rod. At the upper end of the shaft 5 is a cap 6 appropriate. In the lower part of the shaft 5 are three or four wings 7 radially attached, which extend in the axial direction. In the present case, there are two wings 7 to recognize. The wings 7 sit over stepped front edges on the heel 3 on the inner wall of the drain neck 1 on. Due to the selected length of the shaft 5 will the cap 6 at a short distance above the drain flange 2 the drain pipe 1 and thus kept above the pelvic floor. Although water and smaller items can still pass through the gap between the cap 6 and the drain flange 2 pass through, but larger objects no longer.

In notches 8th is an inward canting edge 9 a trained as a sieve catcher 10 engaged 2 ). The sieve 10 consists of a plastic gauze and extends into the drain 1 and optionally in the attached below the sewer pipe. Because the sieve 10 on the insert body 4 releasably secured, this can be done together with the insert body 4 from the drain neck 1 dug and, if necessary, from the insert body 4 be solved. The sieve 10 may be discarded if necessary and against a new sieve 10 be replaced.

In 2 is in detail the latching point of the screen 10 on the insert body 4 shown. The wing shown there 7 of the insert body 4 is in the drain pipe 1 inserted and touched with its front edge, the inner wall of the drain neck 1 , Paragraph 3 on the inner wall of the drain neck 1 carries the insert body 4 by the wing 7 on this paragraph 3 seated.

The wing 7 has a notch 8th into which the flexible edge 9 of the sieve 10 engages, so that the sieve 10 from the insert body 4 is held. The edge is made of flexible plastic.

In 3 is a cut through the in 1 shown device along the section line AA shown. The device is shown in plan view. In this view is the inward cantilever edge 9 of the sieve 10 , which extends downwards, shown. The edge 9 gets off the wings 7 held the insert body, which in turn on the shaft 5 attached to the body.

LIST OF REFERENCE NUMBERS

1

drain socket

2

Drain flange of the drain spigot 1

3

Paragraph in the drain neck 1

4

insert body

5

Shaft of the insert body 4

6

Cap of the insert body 4

7

Wing of the insert body 4

8th

Notch in the wing 7

9

Inwardly cantilever edge of the catcher 10

10

Collecting device, sieve

11

Outwardly cantilever edge of the catcher 10

12

retaining pin

Claims (11)

Drainage device for sanitary basins, comprising a drainage spout ( 1 ), an insertable into the drain neck insert body ( 4 ) and a collecting device ( 10 ), wherein on the inner wall of the drain neck a paragraph ( 3 ) or projections are provided and the insert body in the drain port on the shoulder or the projections is deductible, wherein the insert body ( 4 ) radially projecting, axially extending and for guiding the insert body on the inner wall of the discharge nozzle ( 1 ) serving wings ( 7 ), wherein furthermore the collecting device ( 10 ) on the wings of the insert body ( 4 ) is releasably secured and wherein the collecting device ( 10 ) an upper, inwardly cantilevered edge ( 9 ) which is inserted into corresponding notches ( 8th ) in the wings ( 7 ) of the insert body ( 4 ) is latched. Drainage device according to claim 1, characterized in that the insert body an axial shaft ( 5 ) and arranged at the upper end of the shaft cap ( 6 ) having Drainage device according to one of the preceding claims, characterized in that the collecting device ( 10 ) is cup-shaped. Drainage device according to one of the preceding claims, characterized in that the collecting device ( 10 ) is designed as a sieve. Drainage device according to claim 3, characterized in that the side walls of the cup-shaped collecting device ( 10 ) at least partially tapered downwards. Drainage device according to one of the preceding claims, characterized in that the shoulder ( 3 ) on the inner wall of the drainage nozzle ( 1 ) is formed circumferentially. Drainage device according to one of the preceding claims, characterized in that the collecting device ( 10 ) consists of a perforated and / or gauze-like material. Drainage device according to one of the preceding claims, characterized in that the inwardly cantilevered edge ( 9 ) is formed circumferentially. Drainage device according to one of the preceding claims, characterized in that the inwardly cantilevered edge ( 9 ) consists of a flexible material. Use of the drainage device according to one of claims 1-9 in a sink. Use according to claim 10, characterized in that the sink is used in a facility of the health service.

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