Drain fitting with dirt catch screen, in particular for a shower tray

Abstract

The invention relates to a drain fitting, in particular for a bathtub or shower tray, comprising a drain housing (4) having an inlet opening (5) and an outlet (6), an annular and / or flange-shaped fastening element (8) arranged upstream of the inlet opening (5) in the direction of water drainage, and a dirt trap sieve (12), in particular for retaining hair, which has a support section (12.2) with a plurality of upwardly and / or inwardly projecting prongs (12.1) and can be positively inserted into the fastening element (8). In order to improve, and in particular to simplify, maintenance of the dirt trap sieve (12), the invention provides that the prongs (12.1) of the dirt trap sieve (12) are at least partially flexible. The flexibility of the prongs (12.1) of the, for example, comb-shaped dirt trap sieve (12) facilitates removal, in particular stripping, of hair from the prongs of the sieve.Furthermore, the invention relates to the use of such a dirt trap (12) in a drain fitting of the type mentioned above.

Description

[0001] The invention relates to a drain fitting, in particular in the form of a floor drain or for a bath or shower tray, with a drain housing having an inlet opening and an outlet, a ring-shaped and / or flange-shaped fastening element arranged upstream of the inlet opening in the direction of water drainage and a dirt trap, in particular for retaining hair, which has a support section with a plurality of prongs projecting upwards and / or inwards and can be positively connected to the fastening element.

[0002] Such a drain fitting, which can also be referred to as a drain set, is known from DE 10 2019 131 566 A1. The outlet of the known drain fitting is designed as a pipe socket, which has an outer pipe section and an inner pipe section arranged within the outer pipe section, wherein the pipe sections are radially spaced from one another. The pipe sections thus differ in terms of their connection diameter, so that a decision can be made on the construction site in question as to which connection diameter the drain fitting will be connected to a wastewater pipeline, for which the outer pipe section may then be severed. Furthermore, the drain fitting comprises a comb-shaped hair strainer that is detachably inserted into the drain fitting.The prongs of the hair strainer are formed on an annular section of the strainer insert and protrude relative to the top and inside of the annular section. This well-known drain fitting has generally proven itself to be very effective in practice. However, it has been shown that cleaning the strainer insert can sometimes be very time-consuming, as hair is often difficult to remove from the strainer insert.

[0003] A further problem with the drain fitting known from DE 10 2019 13 1 566 A1 is that the rotational orientation of the drain body is dictated by the wastewater pipeline connected to the pipe socket if the pipe socket does not extend vertically downwards from the underside of the drain body, but rather protrudes laterally from the drain body (hollow drain body) due to space constraints or limited installation depth and extends essentially horizontally. This also dictates the orientation (angular orientation) of a cover hood of the drain fitting designed as a design element and can no longer be changed after the shell construction phase has been completed. This can lead to an unacceptable alignment of the cover hood, for example one that is not contour-parallel, particularly in the case of square or rectangular cover hoods.Even in the case of covers that have a word and / or figurative mark on the top, a certain angular alignment of the mark and thus of the cover is often desired.

[0004] The present invention is based on the object of improving a drain fitting of the type mentioned above with regard to the maintenance of the dirt trap screen. A further object can be seen in largely solving the above-described problem of an unacceptable alignment of a cover that also serves as a design element.

[0005] The first-mentioned object is achieved by a drain fitting having the features specified in claim 1. Advantageous embodiments of the drain fitting according to the invention are specified in the subclaims which refer back to claim 1.

[0006] The drain fitting according to the invention is characterized in that the tines of the dirt trap sieve are at least partially flexible.

[0007] The spaced-apart prongs can also be referred to as teeth. The flexibility of all, a plurality, or at least some of the prongs of the comb-shaped dirt trap screen facilitates removal, in particular, the stripping of hair from the prongs of the screen. The flexibility of the prongs in question enables, for example, elastic deformation thereof, so that gaps defined by the prongs can be elastically widened. In addition, the dirt trap screen designed according to the invention can be easily inserted into a generic drain fitting and removed from the drain fitting for cleaning purposes.

[0008] The flexibility of all, a plurality, or at least some of the tines of the dirt trap screen is preferably designed such that the flexible tine is flexibly deformable along its length or height at various length or height sections. However, it is also within the scope of the invention for the flexibility of all, a plurality, or at least some of the tines of the, for example, comb-shaped dirt trap screen to be designed such that the flexibility of the respective tine is realized by an elastic deformability of the base region or the mounting of the base region of the tine.

[0009] The support section of the dirt trap screen is preferably designed as a ring or flange-sleeve. Furthermore, the support section can be inserted into the fastening element, preferably in a form-fitting manner.

[0010] A further advantageous embodiment of the invention is characterized in that the dirt trap screen is designed as a multi-component component, for example, a two-component component, wherein the support section of the dirt trap screen is essentially made of hard plastic and / or is rigid. This design enables requirement- and cost-optimized production of the dirt trap screen, wherein the flexible tines of the screen are made of a more expensive material, for example, an elastomer or thermoelastomer, whereas the support section of the dirt trap screen is made of a cost-effective material, for example, a thermoplastic, in particular a semi-crystalline thermoplastic such as polyoxymethylene (POM), polypropylene, or polyamide.

[0011] According to a further advantageous embodiment of the invention, the dirt trap screen, designed as a multi-component component, for example a two-component component, is constructed such that the support section of the dirt trap screen and the tines are essentially connected to one another by a material bond. In other words, the at least two components of the component, namely the support section, which is essentially made of hard plastic and / or rigid, and the at least partially flexible tines, which are made, for example, from an elastomer or thermoelastomer, are connected to one another by adhesion of the components. The tines, or at least several of the tines, are preferably connected to one another in one piece by a connecting link.The connecting member integrally connecting the prongs or at least several of the prongs to one another is preferably made of substantially the same material as the prongs in question, for example, an elastomer or thermoelastomer. In addition, a further development of this embodiment as a multi-component component, in particular a two-component component, provides that the prongs or at least several of the prongs, or the connecting member integrally connecting the prongs or at least several of the prongs to one another, are additionally connected to the support section, at least in sections, by positive engagement.For example, during the injection molding process, one or more recesses, for example in the form of one or more grooves, preferably circular arc-shaped grooves, can be formed in the support section, into which the material of at least several of the prongs or of the connecting element that integrally connects at least several of the prongs is then at least partially introduced by injection molding in a form-fitting manner. Alternatively or additionally, projections can be formed on the support section during the injection molding process, which projections are then at least partially over-molded and / or back-molded with material of at least several of the prongs or of the connecting element that integrally connects at least several of the prongs. Said projections are, for example, fastening domes or fastening pins for the form-fitting, detachable fastening of a removable cover.This embodiment of the invention and the aforementioned further development of this embodiment are advantageous because they enable highly efficient production of the dirt trap screen according to the invention in an injection molding tool in one or a few production steps. A comparatively time-consuming production of the dirt trap screen by producing its support section separately from the subsequent production of the tines and subsequently joining the support section to at least several of the separately produced tines in a subsequent production step can thus be avoided.

[0012] A further advantageous embodiment of the invention provides that the tines, or at least several of the tines, are integrally connected to one another by a connecting member, wherein openings assigned to the tines are formed in the support section and penetrate the tines in a form-fitting manner. This allows for a stable connection of the respective tines to one another as well as easy handling, in particular a robust connection of the tines to the support section of the dirt collection screen. Preferably, the connecting member and / or the tines are detachably connected to the support section. This embodiment enables material-separated recycling of the components of the dirt collection screen, which are preferably made of different materials.

[0013] The tines are preferably designed such that each tine tapers from its base to its tip. This facilitates insertion of the tines into the corresponding openings in the support section of the dirt trap. Furthermore, this design facilitates the removal of hair and other dirt from the tines.

[0014] Preferably, a removable cover is arranged above the inlet opening of the drain housing. Spacers are attached or formed on the underside of the cover, which can be releasably connected to projections attached or formed on the upper side of the support section of the dirt trap. The removable cover not only lends the drain fitting an aesthetically pleasing appearance; it also serves, in particular, to prevent small parts, such as shampoo bottle caps, from entering the drain housing.

[0015] According to a further advantageous embodiment of the invention, the projections attached or formed on the upper side of the support section of the dirt trap screen are designed in the form of pins, preferably cylindrical pins, which are provided with a sleeve or cap made of a soft material, e.g., elastomer, or have an annular groove for receiving a rubber ring. The heads of the projections preferably have a toothed profile or toothed profile. This design allows for an easy-to-handle connection between the cover and the dirt trap screen that is secure against accidental loosening.

[0016] A further advantageous embodiment of the invention provides that the support section of the dirt trap screen is designed in the shape of a ring or flange, with the projections arranged between the tines and the inner diameter of the support section. This allows for a relatively large effective screen diameter, with the projections arranged on the inside of the tines being largely protected from contamination by the tines or being located at a distance from the tines in an easily cleanable area.

[0017] A further embodiment of the invention is characterized in that the projections are designed in the form of hollow pins, wherein the connecting member, by means of which the tines or at least several of the tines are connected to one another in one piece, preferably has pin-shaped connecting elements, which are preferably inserted into the hollow pins. The design in the form of hollow pins allows the projections to be produced in a stable form while saving material. The optional pin-shaped connecting elements provided on the connecting member of the tines, which can be inserted into the hollow pins, enable a particularly reliable connection of the tines or the connecting member to the support section of the dirt trap sieve.

[0018] According to a further advantageous embodiment of the invention, the tines are arranged outside the through-opening or the inner diameter of the ring- or flange-sleeve-shaped support section and at a radial distance from the inner diameter. This allows for better accessibility of the tines in order to more easily remove any dirt, particularly hair, adhering to them when cleaning the dirt trap screen. In particular, this embodiment facilitates cleaning of the edge surrounding the inner diameter of the ring- or flange-sleeve-shaped support section. Furthermore, this embodiment allows for optimizing, namely increasing, the overall size of the free inflow openings of an annular gap delimited by the dirt trap screen and a cover hood arranged above the screen.

[0019] A further advantageous embodiment of the invention is characterized in that the fastening element has an inner contour with a circumferential toothed profile into which webs or lugs formed on the support section of the dirt trap screen engage in a form-fitting manner. The webs or lugs can also be referred to as locking webs or locking lugs. This embodiment enables a stepped, preferably finely stepped, insertion of the dirt trap screen into the fastening element, which is connected in a rotationally fixed manner to the drain housing (hollow drain body), depending on the size of the pitch of the toothed profile. The pitch of the circumferential toothed profile, i.e. the distance between two directly adjacent teeth of the toothed profile, measured as a radian, is preferably less than 19°, particularly preferably less than 10°, for example 9° or 6°.If the dirt trap and a cover mounted above the strainer have associated connecting elements, such as pins and sleeve-shaped spacers that can be connected in a form-fitting manner, the cover can be connected via the dirt trap in a rotationally fixed manner to the fastening element, which in turn is rotationally fixed to the drain body when installed. This design thus enables a finely adjusted, largely variable angular alignment of the cover, which is particularly desirable for covers that feature a word mark and / or a design element on the top, the aesthetic appearance of which is influenced by the angular alignment of the cover.

[0020] According to a further advantageous embodiment of the invention, the support section of the dirt trap strainer extends deeper than the fastening element in the fully assembled state of the drain fitting, preferably into the inlet opening of the drain body. This design prevents dirt pockets that would otherwise be present or potentially occur at the transition from the dirt trap strainer to the fastening element.

[0021] A further advantageous embodiment of the invention provides that the support section of the dirt trap strainer extends so deep in the fully assembled state of the drain fitting that the section overlaps or engages over a dip tube inserted into the drain housing, or is inserted into the dip tube. This allows for particularly effective prevention of dirt pockets at the transition from the dirt trap strainer to the drain housing.

[0022] According to a further advantageous embodiment of the invention, the ring- and / or flange-shaped fastening element has through-holes for receiving fastening screws, wherein the heads of the fastening screws are concealed, preferably sealed, by the support section of the dirt trap in the fully assembled state of the drain fitting. The fastening screws are preferably designed as countersunk head screws.

[0023] Concealing or covering the heads of the fastening screws allows for a high-quality or improved aesthetic appearance of the drain fitting. This design also protects the heads of the fastening screws from dirt and / or mechanical impacts.

[0024] A further advantageous embodiment of the invention provides that the annular and / or flange-shaped fastening element has a circumferential shoulder in the direction of its inner diameter, which defines a circumferential recess as a seating surface for the support section of the dirt trap. This allows an inlet surface for water to be drained into the drain housing to be achieved at the transition to the support section of the strainer, which is essentially flush or slopes downwards in the direction of the inner diameter of the fastening element.

[0025] A further advantageous embodiment of the invention is characterized in that the ring- and / or flange-shaped fastening element has a marking for aligning the fastening element with respect to a straight edge, for example, the outer edge of a shower tray, in particular a shower base, wherein the marking is preferably designed in the form of a step or partial surface defining a substantially straight edge. This marking provides a useful reference for simple and rapid alignment of the fastening element with respect to a typically substantially straight outer edge or other straight edge, for example, a straight inner edge, of a shower tray.

[0026] According to a further advantageous embodiment of the invention, the annular and / or flange-shaped fastening element has radial projections, for example in the form of elevations, wherein the dirt trap screen has form-fitting or locking elements associated with the projections, and wherein the projections and the form-fitting or locking elements are designed such that the dirt trap screen can be variably placed on the projections and locked thereto in specific rotational angle steps, for example in rotational angle steps of approximately 120°. This embodiment also enables a variable angular alignment of the dirt trap screen and of a cover hood that can be connected to the dirt trap screen in a form-fitting and preferably friction-locking manner relative to the annular and / or flange-shaped fastening element. Through holes for receiving fastening screws are preferably formed in the radial projections of the fastening element.

[0027] A further advantageous embodiment provides that the positive-locking or locking elements of the dirt trap screen, which are assigned to the radial projections of the annular and / or flange-shaped fastening element, are formed on an annular web that is formed on an underside of the support section of the dirt trap screen. The positive-locking or locking elements are preferably formed in multiple and evenly distributed along the outer circumference of the annular web. For example, the annular web has two or three times n positive-locking or locking elements along its outer circumference, where n is a number from the range 2 to 15, preferably from the range 2 to 12. For example, the positive-locking or locking elements of the support section of the dirt trap screen are formed in the form of a plurality of successive concave indentations on the outer circumference of the annular web.The radial projections of the ring- and / or flange-shaped fastening element engage in a certain number, for example three, of these indentations in a form-fitting manner.

[0028] According to a further advantageous embodiment, the drain fitting according to the invention has closure elements for closing tool openings on fastening screws, wherein the respective closure element is detachably or separably connected to a component of the drain fitting, for example, to the support section of the dirt trap. The closure element is designed to be inserted into a tool opening of a fastening screw to be combined with the fastening element, for example, a hexagon socket opening, in a form-fitting and / or friction-fitting manner, and to close said opening, so that the respective fastening screw is secured against unintentional manipulation. The closure element can also be referred to as an anti-tamper element.Such closure elements are particularly preferably formed on the front ends of the projections attached or formed on the upper side of the support section of the dirt trap screen, wherein the respective closure element is detachably or separably connected to one of the projections. Preferably, the closure element is integrally connected to the projection via a retaining bridge. The retaining bridge can be stem-shaped. The length of the retaining bridge is, for example, in the range from 0.5 mm to 5 mm, preferably in the range from 0.5 to 3 mm. The thickness or diameter of the retaining bridge is, for example, in the range from 0.1 mm to 3 mm, preferably in the range from 0.2 to 2 mm. The closure element can be separated (sheared off) from the projection by rotating it relative to it. To achieve a frictional locking effect, the closure element preferably has one or more rib- or knob-shaped elevations on its circumference.

[0029] The above-mentioned first object is also achieved in particular by the use of a dirt trap sieve designed according to the invention, which has the features specified in claim 1 and / or in one of the claims dependent on claim 1, in a drain fitting, wherein the drain fitting is designed in particular in the form of a floor drain or is prepared for a bathtub or shower tray, and wherein the drain fitting comprises a drain housing (drain hollow body) having an inlet opening and an outlet, wherein an annular and / or flange-shaped fastening element is arranged upstream of the inlet opening in the water drainage direction, and wherein the dirt trap sieve according to the invention, in particular for retaining hair, is positively connected to the fastening element, preferably is positively inserted into the fastening element.

[0030] The present invention therefore also relates in particular to a corresponding use of the dirt trap according to the invention in a drain fitting.

[0031] The invention is explained in more detail below with reference to a drawing illustrating several exemplary embodiments. In the drawings: Fig. 1 a shower tray with a drain fitting according to the invention in a perspective top view, with the cover hood raised explosively; Fig. 2 the drain fitting from Fig. 1 in a perspective exploded view; Fig. 3 the drain fitting from Fig. 2 in the assembled state, but without cover, in a perspective view; Fig. 4 a dirt trap strainer according to the invention of the drain fitting from Fig. 2 with cover, in a perspective view from below; Fig. 5 the dirt trap sieve from Fig. 4 with a fastening element to be arranged underneath, in a perspective exploded view from below; Fig. 6 the Figures 2 to 5 shown dirt trap sieve in a perspective individual view; Fig. 7 a support section of the dirt trap sieve without the prongs of the sieve; Fig. 8 a the support section of the dirt trap sieve and an annular connecting member connecting the prongs of the sieve, in a perspective exploded view; Fig. 8 b another embodiment of the dirt trap sieve with circular arc-shaped connecting members, which connect the prongs of a comb-like sieve to each other, in a perspective top view or exploded view; Fig. 9 the Figures 2 and 5 shown fastening element in a perspective individual view; Fig. 10 the fastening element from Fig. 9 in plan view; Fig. 11 a cross-sectional view of the fastening element along the section line XI-XI in Fig. 10; Fig. 12 a plan view of a section of a shower tray with a fastening element according to a further development for a drain fitting according to the invention; Fig. 13 the fastening element from Fig. 12 in a perspective individual view; Fig. 14 a perspective view of a dirt trap according to the invention after a further development in combination with a fastening element according to the Figures 12 and 13 ; Fig. 15 the fastening element from Fig. 13 in conjunction with the dirt trap sieve made of Fig. 14 in a perspective bottom view; Fig. 16 the fastening element from Fig. 13 and the dirt trap from the Figures 14 and 15 in conjunction with a dip tube in a perspective vertical sectional view; Fig. 17 another embodiment of the support section of the dirt trap screen, in a perspective view, similar to that in Fig. 14shown example; Fig. 18 an enlarged detailed view of the support section from Fig. 17 ; Fig. 19 another embodiment of a dirt trap according to the invention in a perspective view (top view); Fig. 20 the dirt trap from Fig. 19 in a perspective vertical sectional view (axial sectional view); Fig. 21 the dirt trap sieve from Fig. 19 in a perspective bottom view; and Fig. 22 the dirt trap sieve from Fig. 19 in combination with a fastening element in accordance with Figures 12 and 13 in bottom view.

[0032] The drain fitting (drain fitting) 1 shown in the drawing is intended for the drainage of shower trays, bathtubs and the like. Fig. 1 A flat shower tray 2, which can also be referred to as a shower base, is shown. The shower tray (shower base) 2 has a drain opening 3, to whose peripheral edge the drain fitting 1 is detachably attached.

[0033] The drain fitting 1 has a drain housing (hollow drain body) 4, which has an inlet opening 5 and an outlet 6. The outlet 6 is preferably designed in the form of a pipe socket 4.1, to which a pipeline (not shown here) (wastewater pipe) can be connected. In the exemplary embodiment shown, the outlet 6 opens laterally on the drain housing 4. The central axis of the pipe socket 4.1 runs essentially horizontally in the installation position predetermined by the inlet opening 5 of the drain housing 4. For the watertight connection of a pipeline, the pipe socket 4.1 preferably has an external thread for screwing on a union nut, by means of which a conical sealing ring pushed onto the pipeline can be pressed into the annular gap defined by the pipe socket 4.1 and the pipeline pushed therein.

[0034] The drain housing 4 has, for example, a pot-shaped section 4.2 and a lid-shaped section 4.3. The sections 4.2 and 4.3 are preferably connected to one another by a material fit. On the upper side of the drain housing 4 or the lid-shaped section 4.3, an annular connecting surface is formed, which serves as a bearing and clamping surface for mounting the drain housing 4 on the underside of a shower tray 2. A sealing ring 7 is arranged on the connecting surface. The sealing ring 7 is preferably provided with a circumferential groove on its underside, wherein, for example, an annular web is formed on the connecting surface, which engages in the groove, so that this positive connection between the sealing ring 7 and the connecting surface results in a radial locking of the sealing ring 7.

[0035] The inlet opening 5 of the drain housing 4 is assigned a ring- and / or flange-shaped fastening element 8, by means of which the drain housing 4 is secured to the edge surface of the drain opening 3 of the shower tray 2. For this purpose, the fastening element 8 has at least two, preferably three, through-holes 8.1 evenly spaced from one another along its circumference for the positive reception of fastening screws 9. The fastening element 8 can also be referred to as a fastening flange. During assembly of the drain housing 4, the underside or clamping surface of the fastening flange 8 rests against the upper edge surface of the drain opening 3 of the shower tray 2, while the sealing ring 7 is pressed against the lower edge surface of the drain opening 3 when the fastening screws 9 are tightened, the respective threaded shafts of which pass through the through-holes 8.1 of the mounting flange 8 and screwed into threaded holes of the drain body 4. The threaded holes are realized, for example, by threaded sleeves made of metal, which are cast into the plastic drain body 4.

[0036] An odor trap is optionally formed in the drain housing 4 between the inlet opening 5 and the outlet 6. The odor trap is formed, for example, by a circumferential wall of the cup-shaped section 4.2 of the drain housing 4, which defines an overflow edge, and by an immersion pipe 4.6 suspended in the cup-shaped section 4.2. The lower end of the immersion pipe 4.6, when installed, ends at a distance from the floor and the circumferential wall of the cup-shaped section 4.2, thus defining a lower wastewater diversion. The circumferential wall and the overflow edge, which is higher relative to the lower wastewater diversion, are surrounded by an annular channel section of the drain housing 4. The channel section opens at the outlet 6 of the drain housing 4 and has a channel floor inclined at an angle towards the outlet (pipe socket) 6. The immersion pipe 4.6 can be removed from the drain housing 4 through the inlet opening 5 and inserted upside down.For this purpose, the immersion tube 4.6 is preferably provided with at least one gripping element 4.61. The gripping element 4.61 can, for example, be designed in the shape of a bow or as a radially inwardly projecting web, wherein the web advantageously has an upper edge 4.62 sloping inward from the inside of the immersion tube 4.6 (see also . Fig. 16 ).

[0037] Furthermore, the drain fitting 1 comprises a dirt trap 12, in particular for retaining hair. The dirt trap (hair trap) 12 is arranged at the inlet opening 5 and is detachably connected to the fastening element (mounting flange) 8.

[0038] The dirt trap screen 12 is comb-shaped and has a plurality of vertically upwardly extending tines 12.1. The dirt trap screen 12 has a support section 12.2, which is preferably ring-shaped or flange-sleeve-shaped.

[0039] The prongs (teeth) 12.1 are held on the support section 12.2, with the prongs 12.1 projecting upward from the support section 12.2. According to the invention, the prongs 12.1 are at least partially flexible. Preferably, all prongs of the dirt trap screen 12 are at least partially flexible. The prongs 12.1 are made, for example, of a rubber-elastic material, preferably of an elastomer or the like.

[0040] The dirt trap 12 is preferably designed as a multi-component component, for example as a two-component component, wherein the support section 12.2 is rigid and / or made of hard plastic, for example polypropylene. The tines 12.1 or at least several of the tines 12.1 are preferably connected to one another in one piece by a connecting member 12.4, wherein openings 12.21 assigned to the tines 12.1 are formed in the support section 12.2 and are penetrated by the tines 12.1 in a form-fitting manner. The connecting member 12.4 can, for example, be annular, in particular in the form of a closed ring, or arcuate, in particular in the form of a ring segment (see in particular Figures 7 , 8a and 8b ). In the case of a one-piece design of the tines 12.1 and the associated connecting link 12.4, the tines 12.1 and the connecting link 12.4 are preferably made of the same material.

[0041] The connecting link 12.4 and / or the prongs 12.1 are preferably detachably connected to the support section 12.2. The unit consisting of the connecting link 12.4 and the prongs 12.1 can be manufactured separately from the support section 12.2. In particular, the support section 12.2 can be manufactured from a different material than the prongs 12.1 or the unit consisting of the connecting link 12.4 and the prongs 12.1. For cleaning purposes, the unit consisting of the connecting link 12.4 and the prongs 12.1 can be detached from the support section 12.2 without causing damage or destruction.

[0042] However, it is also within the scope of the invention to connect the tines 12.1 and the support section 12.2 of the dirt trap screen 12 to one another in a materially bonded manner or to form them in one piece, wherein the tines 12.1 are, however, at least partially flexible.

[0043] The prongs 12.1 are preferably arranged outside the opening or the inner diameter of the preferably ring- or flange-sleeve-shaped support section 12.2 and at a radial distance from its opening or inner diameter. The radial distance of the prongs 12.1 from the inner diameter of the ring- or flange-sleeve-shaped support section 12.2 is, for example, more, preferably more than twice the horizontal extension of one of the prongs 12.1 in the direction of the inner diameter of the support section 12.2, measured in the base region of the prong 12.1. The prongs 12.1 are preferably designed such that the respective prong 12.1 tapers from its base region to its tip.

[0044] Lugs or webs 12.6 are formed on the support section 12.2, which, when the dirt trap screen 12 is mounted, engage positively with the inner contour of the flange-shaped fastening element (fastening flange) 8. The inner contour of the fastening element 8 has a circumferential toothed profile 8.3, into which the webs or lugs 12.6 engage positively, so that the dirt trap screen 12 can also be connected in a rotationally fixed manner to the drain housing 4 via the fastening element 8, which can be connected in a rotationally fixed manner to the drain housing 4 (see in particular Figures 2 , 4 , 5 , 8a and 9 to 11 ).

[0045] The webs or lugs 12.6 are formed on the underside, preferably in the throat area between the flange 12.22 and the hollow cylindrical section 12.23 of the support section 12.2. Preferably, at least three webs or lugs 12.6, for example, six webs or lugs 12.6 are provided, which are preferably arranged at equal spacing from one another along the circumference of the hollow cylindrical section 12.23.

[0046] The fastening element 8 is preferably made of rust-proof metal, e.g., stainless steel sheet. The pitch of the toothing profile (toothing) 8.3, measured as a radian, is preferably less than 19°, for example, only approximately 9° or 6°. The toothing 8.3 is therefore comparatively fine. The outer diameter of the flange-shaped fastening element 8 can, for example, be in the range of 100 mm to 120 mm. The inner diameter of the fastening element 8 can, for example, be in the range of 65 mm to 75 mm. The through-holes 8.1 for receiving the fastening screws 9 can, for example, be on a pitch circle with a diameter in the range of approximately 80 to 85 mm.

[0047] When the drain fitting 1 is fully assembled, the heads 9.1 of the fastening screws 9 are concealed by the section 12.2 of the dirt trap strainer 12. The fastening screws 9 are preferably countersunk head screws. Accordingly, the edge of the associated through-hole 8.1 is preferably conically shaped so that the screw head 9.1 does not protrude beyond the upper surface of the flange-shaped fastening element 8 when the flange is assembled.

[0048] Furthermore, the fastening element 8 has a circumferential shoulder in the direction of its inner diameter, which defines a circumferential recess 8.5 as a seating surface for the section 12.2 of the dirt trap 12. In the assembled state, the upper side of the section 12.2 is preferably at the same height or slightly lower than the upper side of the edge of the fastening element 8 surrounding this section 12.2.

[0049] The support section 12.2 of the dirt trap sieve 12 is designed such that, in the fully assembled state of the drain fitting, it extends deeper than the fastening element 8, preferably into the inlet opening 5 of the drain housing 4. Particularly preferably, the ring- or flange-sleeve-shaped support section 12.2 extends so deep in the fully assembled state of the drain fitting 1 that it overlaps and / or engages over an immersion pipe 4.6 inserted into the drain housing 4.

[0050] Furthermore, the drain fitting 1 preferably has a removable cover 10, which is arranged above the inlet opening 5 of the drain housing 4. Spacers 11 are attached or formed on the underside of the cover 10, which can be positively and detachably connected to projections 12.7 attached or formed on the upper side of the support section 12.2 of the dirt trap 12. The vertically projecting projections 12.7 are designed, for example, in the form of cylindrical pins, which have an annular groove for receiving a rubber ring 13, wherein the heads 12.71 of the projections 12.7 preferably have a toothed profile or toothed profile. The rubber rings 13 provide an additional frictional connection between the projections 12.7 and the spacers 11 attached thereto. Corresponding rubber rings 13 are shown in the Figures 3 , 6 and 8aThe projections 12.7 are preferably arranged between the prongs 12.1 and the inner diameter of the ring- or flange-sleeve-shaped support section 12.2.

[0051] In the Figures 4 , 5 and 8aIn the embodiment shown, the projections 12.7 are designed in the form of hollow pins, wherein the connecting member 12.4, by means of which the prongs 12.1 are connected to one another in one piece, preferably has pin-shaped connecting elements 12.41 which are inserted into the hollow pins 12.7. The rubber rings 13 to be attached to the projections (pins) 12.7 can be produced together with the prongs 12.1 and the connecting member 12.4, for example by injection molding or extrusion, wherein the rubber rings 13 can, for example, first be connected to the pin-shaped connecting elements 12.41 of the connecting member 12.4 via easily separable connecting bridges and are then separated from these in order to then insert the rubber rings 13 into the annular grooves of the projections 12.7.

[0052] In the Figures 12 to 16 Further embodiments of the invention are shown. In contrast to the Figures 2 , 5 and 9 to 11The fastening element (mounting flange) 8 shown in the Figures 12 and 13 The fastening element 8 shown, which is also ring- or flange-shaped, has a marking 8.6 which serves to align the fastening element 8 with respect to a substantially rectilinear inner or outer edge 2.1 of a shower tray 2, in particular a shower base. The marking 8.6 is designed, for example, in the form of a step or partial surface of the fastening element 8 defining a substantially rectilinear edge 8.7.

[0053] Furthermore, this differs in the Figures 12 and 13 shown fastening element 8 from the one shown in the Figures 2 , 5 and 9 to 11The fastening element 8 shown is characterized in that it has radial projections 8.9, which can be designed, for example, in the form of elevations. The through holes 8.1 for receiving fastening screws 9 are formed in the projections 8.9 (cf. Fig. 2 ). The dirt trap sieve 12 has positive locking or locking elements 12.6' associated with the projections 8.9 (cf. Fig. 13 and 15 ). The projections 8.9 and the form-fitting or locking elements 12.6' are designed such that the dirt trap sieve 12 can be variably placed on the projections 8.9 of the fastening element 8 and locked thereto in certain rotational angle steps, for example in rotational angle steps of 120°.

[0054] As in the Figures 14 and 16As shown, the dirt trap screen 12 again has a support section 12.2 with a plurality of upwardly projecting prongs 12.1. According to the invention, the prongs 12.1 are at least partially flexible. For example, the prongs 12.1 are made at least partially of a rubber-elastic material. The support section 12.2, on the other hand, is preferably made of hard plastic and / or is essentially rigid.

[0055] Also, the Figures 14 to 16 The support section 12.2 of the dirt trap screen shown is designed in the shape of a ring or flange, with the tines 12.1 of the screen being arranged outside the inner diameter of the support section 12.2 and at a radial distance from the inner diameter.

[0056] The positive-locking or locking elements 12.6' of the dirt trap screen 12 are designed, for example, in the form of indentations of a circumferential collar or web, with the collar or web projecting substantially vertically downwards on the underside of the support section 12.2 of the screen. The indentations are, for example, arcuate or approximately semicircular, with the radial projections 8.9 of the annular or flange-shaped fastening element 8 being correspondingly convex or substantially semicircular.

[0057] The support section 12.2 of the sieve has an upper, flange-shaped section 12.22, an inwardly adjoining transition section 12.24, and a bush-shaped section 12.23 adjoining the transition section. The transition section 12.24 is essentially conical and defines arcuate, obliquely inwardly inclined drainage surfaces 12.25. The drainage surfaces 12.25 are spaced from one another by nose-shaped bulges 12.26, with the indentations 12.6' of the circumferential collar or web being formed on the underside of the bulges 12.26 (see FIG. Figs. 15 and 16 ).

[0058] On the upper side of the support section 12.2 of the dirt trap screen, projections 12.7 are attached or formed, which allow the detachable connection of a removable cover 10, as used for example in the Fig. 1 , 2 and 4shown and described above. The projections 12.7 are preferably formed on the nose-shaped bulges 12.26 of the support section 12.2. Furthermore, the projections 12.7 can each be arranged between two adjacent tines 12.1 of the plurality of tines 12.1 formed on a pitch circle of the flange-shaped section 12.22 of the sieve.

[0059] The respective projection 12.7 has a pin-shaped core 12.72 made of a hard material, for example, hard plastic, and preferably formed integrally with the support section 12.2 of the screen. The core 12.72 is provided with a cap or sleeve 12.73 made of a soft material, for example, elastomer.

[0060] In the fully assembled state of the drain fitting, the support section 12.2 of the dirt trap strainer 12 extends so deeply into the drain housing that the end of its tubular or bushing-shaped section 12.23 protrudes or is inserted into an immersion tube 4.6 inserted into the drain housing. The immersion tube 4.6 has external ribs 4.62 at its upper end, which define at least one annular groove into which a circumferential seal (not shown), for example an O-ring, is inserted. The immersion tube 4.6 is held in a form-fitting manner by the ribs 4.62 and the circumferential seal on at least one shoulder on the inlet opening 5 of the drain housing 4, which shoulder is preferably designed as a circumferential shoulder. To remove the immersion tube 4.6 from the drain housing, the immersion tube is provided with, for example, two handle elements 4.61, each designed as a radially inwardly projecting web. The respective web-shaped handle element 4.61 has an upper edge 4.63 sloping inward from the inside of the immersion tube 4.6. Furthermore, the respective grip element 4.61 is designed such that, at the upper end of its sloping upper edge 4.63, it defines a gap 4.65 with the inner surface of the immersion tube 4.6, into which the lower end of the tubular or bush-shaped section 12.23 of the support section 12.2 of the dirt trap 12 engages in the assembled state.

[0061] The Fig. 17 The embodiment of the dirt trap screen 12 according to the invention shown in FIG. 1 differs from that shown in FIGS. Figures 14 and 16In the example shown, this is achieved by the fact that the projections 12.7 attached or formed on the upper side of the support section 12.2 of the sieve have closure elements 12.75 at their front ends. The closure elements 12.75 are detachably or separably connected to the projections 12.7. The respective closure element 12.75 is designed to be inserted into the tool opening of a fastening screw 9 to be combined with the fastening element (fastening flange) 8, for example, a hexagon socket opening 9.11 (cf. Fig. 2 ), to be inserted in a form-fitting and friction-locking manner and to close them so that the relevant fastening screw 9 is secured against unintentional manipulation.

[0062] The closure element 12.75 is integrally connected to the projection 12.7 via a narrow and short retaining bridge (not shown). The retaining bridge represents a predetermined breaking point. It is preferably stem-shaped. Its length is, for example, in the range of 0.5 mm to 5 mm; its average diameter is preferably in the range of 0.2 to 3 mm. The closure element 12.75 can be separated (sheared off) from the projection 12.7 by rotating it about the longitudinal axis of the latter. To achieve a frictional locking effect, the closure element 12.75 has, for example, rib-shaped elevations 12.76 on its circumference. The elevations 12.76 extend along the axial edges of the closure element 12.75 and can therefore also be referred to as axial ribs.

[0063] In the Figures 19 to 22Another embodiment of a dirt trap 12 for a drain fitting according to the invention is shown. The drain fitting, which is not shown completely in these figures, comprises a drain housing which, for example, Fig. 2 The drain body 4 is fixed to the housing by means of a ring- and / or flange-shaped fastening element 8, as shown for example in Fig. 13 shown, on the edge surface of the drain opening of a bath or shower tray. To avoid repetition, particular reference is made to the above description of the Figures 1 , 2 , 12 and 13 referred to.

[0064] The Figures 19 to 22The dirt trap screen 12 shown is designed as a multi-component component, for example as a two-component component. The dirt trap screen 12 is designed such that the support section 12.2 and the prongs 12.1 are essentially connected to one another by a material bond (adhesive connection). The support section 12.2 and the at least partially flexible prongs 12.1 are components made of different plastic materials and manufactured in a multi-component or two-component injection molding process, wherein the injection molding is or was preferably carried out in one and the same injection molding tool, which has a mold cavity that can be changed by means of tool elements that can be adjusted relative to one another. For example, the support section 12.2 of the dirt trap screen 12 is first produced in the mold cavity in the injection mold. The support section 12 is then2 is expanded at one or more predetermined locations by mechanically and / or hydraulically moving, e.g., shifting or retracting, one or more tool elements. A specific plastic material is then injected into the thus expanded cavity areas of the cavity to produce the tines 12.1 and a connecting element 12.4 that integrally connects the tines 12.1 to one another. This specific plastic material is, for example, an elastomer or a thermoplastic, such as TPE, TPS-SEBS, or EVAC.

[0065] In the Figures 19 and 20It can be seen that during the injection molding process, peg-shaped projections 12.7 and a plurality of circular arc-shaped grooves 12.8 were formed in the support section 12.4 of the dirt trap screen 12, wherein the projections 12.7 and the circular arc-shaped grooves 12.8 lie on a common pitch circle. In a subsequent injection molding process in the same injection mold, the flexible prongs 12.1 are produced. For this purpose, the cavity of the injection mold is widened in the area of ​​the projections 12.7, along the grooves 12.8, and at spaced-apart locations that directly adjoin the grooves 12.8 and each define a position of a cavity for one of the prongs 12.1. Plastic material, which has flexible molding properties in the crosslinked or solidified state, is then injected into the widened areas of the cavity.

[0066] Several of the tines 12.1 of the dirt trap screen are therefore integrally connected to one another by a circular-arc-shaped connecting member 12.4. The connecting member 12.4, which integrally connects the tines 12.1 or at least several of the tines 12.1 to one another, is preferably made of substantially the same material, for example, an elastomer or thermoelastomer, as the respective tines 12.1. The connecting members 12.4 are preferably designed such that their upper side is flush with the adjacent upper side of the support section 12.2 (cf. Figs. 19 and 20). Due to the grooves, the connecting links 12.4 and the prongs 12.1 formed thereon are also positively connected to the support section 12.2 of the dirt trap screen 12. In addition, a positive connection between the support section 12.2 and the material of the prongs 12.1 and the connecting links 12.4 connecting them to one another is achieved by the projections (pins) 12.7 formed on the support section 12.2 being overmolded or backmolded with said material in a form-fitting manner. The projections 12.7 are thus provided, for example, with caps 12.73' made of soft, flexible material. The caps 12.73' are designed in such a way that each of them has at least one axially extending groove 12.77 on the outside (cf. Fig. 19 ). This groove 12.77 facilitates a diameter reduction or compression of the soft, flexible material of the respective cap 12.73` when sleeve-shaped spacers 11 of a cover 10 according to Fig. 4be placed onto the caps 12.73'. In addition, the groove 12.77 allows the controlled escape of air from the sleeve-shaped spacer 11 of the cover 10 when the cover 10 is put on.

[0067] Furthermore, in the Figures 21 and 22It can be seen that the positive-locking or locking elements 12.6' of the dirt trap screen 12, which are assigned to the radial projections 8.9 of the annular and / or flange-shaped fastening element 8, are formed on an annular collar or web 12.9 that projects axially from the underside of the support section 12.2 of the dirt trap screen 12. The positive-locking or locking elements 12.6' are formed in a plurality of successive concave indentations evenly distributed along the outer circumference of the annular collar or web 12.9. For example, the annular collar or web 12.9 has 36 positive-locking or locking elements 12.6' in the form of concave indentations along its outer circumference. The radial projections 8.9 of the fastening element 8 engage in a positive-locking manner in three of these indentations.

[0068] The implementation of the invention is not limited to the exemplary embodiments illustrated in the drawings. Rather, numerous variants are conceivable, which, even with designs deviating from the illustrated exemplary embodiments, make use of the invention disclosed in the appended claims. For example, the drain fitting 1 according to the invention can also be designed or used as a floor drain or in combination with a shower channel or bathtub, or with a washbasin or a kitchen sink.

Claims

1. Drain fitting (1), in particular in the form of a floor drain or for a bath or shower tray, with a drain housing (4) having an inlet opening (5) and an outlet (6), a ring-shaped and / or flange-shaped fastening element (8) arranged upstream of the inlet opening (5) in the direction of water drainage, and a dirt trap (12), in particular for retaining hair, which has a support section (12.2) with a plurality of prongs (12.1) projecting upwards and / or inwards and can be positively connected to the fastening element (8), characterized in that the tines (12.1) of the dirt trap sieve (12) are at least partially flexible.

2. Drain fitting according to claim 1, characterized in that the dirt trap screen (12) is designed as a multi-component component, wherein the support section (12.2) of the dirt trap screen (12) is essentially made of hard plastic and / or is rigid.

3. Drain fitting according to claim 1 or 2, characterized in that the tines (12.1) or at least several of the tines (12.1) are connected to one another in one piece by a connecting member (12.4), wherein openings (12.21) associated with the tines (12.1) are formed in the support section (12.2), which openings are penetrated by the tines (12.1) in a form-fitting manner.

4. Drain fitting according to claim 3, characterized in that the connecting link (12.4) and / or the prongs (12.1) are detachably connected to the support section (12.2).

5. Drain fitting according to one of claims 1 to 4, characterized in that the support section (12.2) is ring-shaped or flange-sleeve-shaped, wherein the tines (12.1) are arranged outside the inner diameter of the support section (12.2) and at a radial distance from the inner diameter.

6. Drain fitting according to one of claims 1 to 5, characterized in thatthe fastening element (8) has an inner contour with a circumferential toothed profile (8.3) into which webs or lugs (12.6) engage in a form-fitting manner, which are formed on the support section (12.2) of the dirt trap screen (12).

7. Drain fitting according to one of claims 1 to 6, characterized in that the ring-shaped or flange-sleeve-shaped section (12.22) of the dirt trap strainer (12) extends deeper than the fastening element (8) in the fully assembled state of the drain fitting, preferably into the inlet opening of the drain housing (4).

8. Drain fitting according to one of claims 1 to 7, characterized in that the support section (12.2) of the dirt trap strainer (12) extends so deep in the fully assembled state of the drain fitting (1) that the support section (12.2) overlaps or engages over an immersion pipe (4.6) inserted into the drain housing (4) or is inserted into the immersion pipe (4.6).

9. Drain fitting according to one of claims 1 to 8, characterized in thata removable cover (10) is arranged above the inlet opening (5), on the underside of which spacers (11) are attached or formed, which can be detachably connected to projections (12.7) attached or formed on the upper side of the support section (12.2) of the dirt trap sieve (12.2).

10. Drain fitting according to claim 9, characterized in that the projections (12.7) are in the form of cylindrical pins which are provided with a sleeve (12.73) or cap (12.73') made of soft material or have an annular groove for receiving a rubber ring (13), wherein the heads (12.71) of the projections (12.7) preferably have a tooth profile or toothing profile.

11. Drain fitting according to claim 9 or 10, characterized in that the support section (12.2) is ring-shaped or flange-sleeve-shaped, wherein the projections (12.7) are arranged between the prongs (12.1) and the inner diameter of the support section (12.2).

12. Drain fitting according to claim 3 or 4 in combination with one of claims 9 to 11, characterized in that the projections (12.7) are designed in the form of hollow pins, wherein the connecting member (12.4), by means of which the prongs (12.1) or at least several of the prongs (12.1) are connected to one another in one piece, preferably has pin-shaped connecting elements (12.41), which are preferably inserted into the hollow pins.

13. Drain fitting according to one of claims 1 to 12, characterized in that the ring- and / or flange-shaped fastening element (8) has through-holes (8.1) for receiving fastening screws (9), wherein the heads (9.1) of the fastening screws (9) are concealed from view by the support section (12.2) of the dirt trap sieve (12) in the fully assembled state of the drain fitting (1), wherein the fastening screws (9) are preferably designed as countersunk head screws.

14. Drain fitting according to one of claims 1 to 13, characterized in thatthe ring- and / or flange-shaped fastening element (8) has a circumferential shoulder in the direction of its inner diameter, which defines a circumferential recess (8.5) as a seating surface for the support section (12.2) of the dirt trap sieve (12).

15. Drain fitting according to one of claims 1 to 14, characterized in that the ring- and / or flange-shaped fastening element (8) has a marking (8.6) for aligning the fastening element (8) with respect to a straight edge (2.1) of a shower tray (2), in particular a shower base, wherein the marking (8.6) is preferably designed in the form of a step or partial surface defining a substantially straight edge (8.7).

16. Drain fitting according to one of claims 1 to 15, characterized in thatthe annular and / or flange-shaped fastening element (8) has radial projections (8.9), wherein the dirt trap screen (12) has form-fitting or locking elements (12.6') associated with the projections (8.9), and wherein the projections (8.9) and the form-fitting or locking elements (12.6') are designed such that the dirt trap screen (12) can be variably placed on the projections (8.9) and locked thereto in specific rotational angle steps.

17. Use of a dirt trap sieve (12) with the features specified in claim 1 and / or in one of claims 2 to 16 dependent on claim 1 in a drain fitting (1), wherein the drain fitting (1) is designed in particular in the form of a floor drain or is prepared for a bath or shower tray (2), and wherein the drain fitting (1) comprises a drain housing (4) having an inlet opening (5) and an outlet (6), wherein an annular and / or flange-shaped fastening element (8) is arranged upstream of the inlet opening (5) in the direction of water drainage, and wherein the dirt trap sieve (12), in particular for retaining hair, can be inserted into the fastening element in a form-fitting manner.

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