Bathtub or shower tray

Abstract

Bath or shower tray with a tray body (1) formed from enamelled sheet metal, wherein at least one usable side (2) and an outer edge of the tray body (1) are provided with an enamelling, wherein the sheet metal is bent over at the outer edge with an edge contour, characterized in that the edge contour deviates from an L-shape, a C-shape and a U-shape.

Description

[0001] The invention relates to a bathtub or shower tray with a tray body formed from enamelled sheet metal, wherein at least one usable side and an outer edge of the tray body are provided with an enamel coating, wherein the sheet metal is bent over at the outer edge with an edge contour.

[0002] The invention relates specifically to bathtubs and shower trays. Washbasins used in sanitary areas are also generally known. Sanitary washbasins, especially those with an enamelled body, typically differ significantly from kitchen sinks, which are often made of stainless steel.

[0003] Although the described aspects are also generally applicable to washbasins in sanitary areas, the invention specifically relates to bathtubs and shower trays, which in practice are subjected to considerable weight loads. In both applications, unlike with a conventional washbasin, the weight of at least one user must be supported.

[0004] Bathtubs and shower trays are often used by two people simultaneously, which can result in particularly high weight loads. These weight loads can also be concentrated in a relatively localized area, for example, if a shower tray is loaded off-center by one user. During a user's movements, the entire weight load can also be concentrated at a single point, such as on one of the user's feet.

[0005] Several aspects must be considered when designing and selecting bathtubs and shower trays. Bathtubs and shower trays with an enamelled sheet metal body are particularly known for their exceptional durability. Replacement often occurs for aesthetic reasons rather than due to excessive wear and tear.

[0006] Even though bathtubs or shower trays with a shell made of enamelled sheet metal are particularly durable and easily recyclable, the aim is to minimize material usage and ensure the simplest possible manufacturing and assembly. With regard to the sheet metal, a closed-loop material cycle can be implemented, in line with the principles of a circular economy. The enamel, on the other hand, can be advantageously used as a slag former during metallurgical remelting. The resulting slag can then be used as a building material.

[0007] The bathtub or shower tray must be sufficiently stable during manufacturing and use, which requires, for example, adequate sheet metal thickness. The bathtub or shower tray should also exhibit good dimensional accuracy during production and use. It should also be noted that warping during the enameling process can negatively affect the dimensional accuracy of the tray body.

[0008] There are various ways to support a bathtub against a floor surface. Bathtubs can be supported, for example, by feet, an outer apron, and / or a bathtub support. For instance, it is possible to provide a load-bearing bathtub support onto which the bathtub is then placed with its rim.

[0009] There are also various approaches to shower trays. For example, it is common to install a shower tray with a base frame on the floor. Alternatively, it can also be supported by ledges or placed directly on a surface.

[0010] Taking into account the usual requirements for stability and ease of assembly, different geometries of bathtub edges are known from practice.

[0011] In a typical design, sanitary bathtubs can have a C-shaped rim with a lower edge. Starting from an approximately horizontal mirror section, a vertical section is provided after a first bend of approximately 90°, before a further bend of 90° in the same direction connects to the also approximately horizontal lower edge. The C-shaped rim can be used, for example, to accommodate mounting rails, feet, or bases. Furthermore, the sanitary bathtub can also be directly supported on a surface by its lower edge. Corresponding designs of sanitary bathtubs are known, for example, from DE 10 2017 105 290 B3, DE 20 2011 001 006 U1, DE 20 2012 103 906 U1, EP 2 289 379 A2, and EP 3 045 094 A1. The C-shaped rim of the tub effectively stabilizes the tub body.

[0012] Furthermore, it is known to have the edge of a bathtub or shower tray taper off smoothly, so that no bending is required there. This results in particularly simple manufacturing, as no further forming step is necessary to create the edge. However, such a design is disadvantageous with regard to stability. During and after installation, it must be ensured that the edge is adequately supported. Furthermore, significant distortion can occur during manufacturing of an enamelled sheet metal if the smooth edge is subjected to substantial temperature changes. Bathtubs or shower trays with a straight-edged edge are known, for example, from DE 10 2016 108 128 A1, DE 10 2019 120 066 A1, EP 3 298 938 A1 and DE 103 11 845 B3. DE 10 2019 106 040 A1 also proposes a flat rim on the tub, but further reinforcement may be provided for stabilization and / or straightening.

[0013] According to EP 3 453 296 A1 and DE 101 55 021 B1, a right-angled downward bend is provided starting from a horizontal mirror section, but this provides less stabilization compared to, for example, a C-shaped rim.

[0014] From DE 7223897 U and DE 10 2012 111 579 B4 it is known to design a tub rim in a U-shape, wherein, in a horizontal orientation according to DE 10 2012 111 579 B4, the sheet metal is bent from a horizontal top surface in an arc of about 180° and then ends with a horizontal leg.

[0015] The present invention is based on the objective of providing a bathtub or shower tray with an improved geometry in the area of ​​the edge, which can be installed flat and has improved functional properties.

[0016] The subject of the invention and the solution to the problem is a bathtub or shower tray according to claim 1.

[0017] According to one aspect of the invention, the edge contour has a continuous bend with a bending angle of more than 200°. A correspondingly long bend creates a particularly large, non-planar, and therefore stabilizing structure. Starting from an approximately flat working surface, a continuous bend is created when the contour is bent downwards, which then points back towards a working surface of the tub body.

[0018] A continuous bend can be created in various ways. For example, a rolling tool can be brought into contact with the initially flat sheet metal during manufacturing, with the movement of the rolling tool then gradually forming and essentially rolling the sheet metal. The bending angle can also be influenced by the guidance and stroke of such a rolling tool.

[0019] For example, it is easily possible to create a continuous bend with a bending angle greater than 340°. If the bending angle is approximately 340° to 360°, a circular shape is formed, assuming a roughly constant bending radius. Starting from a substantially flat top surface of the tub, the sheet metal can then be brought to the underside of the tub body at the end of the bend at an angle of approximately 340° to 360° to form a substantially closed, ring-shaped structure.

[0020] As explained below, a support and / or connection can also be provided there. For example, it is conceivable to connect the edge contour to the underside of the tub body, for which adhesive, a sealant, a weld, or the like may be used. The various measures can also be combined one above the other or side by side.

[0021] It goes without saying that all the edge contours described here do not need to be present in the same way around the entire circumference of the tub body. For example, it is conceivable to provide edge contours only in sections and / or to combine them. The described contours also show that, especially at tub corners, cutouts are generally useful or necessary to form the sheet metal in the manner described.

[0022] Especially when, for example, a continuous bend is created using the previously described rolling tool, the bending angle can easily exceed 360°. The sheet metal is then, in effect, rolled in multiple layers, resulting in particularly high strength. However, it is also clear that a consistent bending radius is no longer possible during this rolling process, because several layers of sheet metal are placed on top of each other, and the inner layers must therefore have a tighter bending radius.

[0023] However, production is easily possible because, for example, by appropriately guiding the rolling tool when pushing sheet metal forward, the outermost edge of the sheet metal is forcibly rolled in and guided by the adjacent layer.

[0024] When the sheet metal is rolled up as described, a ring-shaped edge contour is formed. It is then also possible to provide a stabilizing insert, particularly in the form of a rod or tube, in addition to the sheet metal in the area of ​​the edge contour. For example, a cylindrical rod or tube can simply be rolled up with the sheet metal and, with a suitable size and arrangement, will then be securely held in place.

[0025] Even in the described process of creating a continuous bend with a bending radius of 360° or more, the sheet metal, relative to a mounting position at the edge contour, is arranged section by section in at least one vertical cutting plane in three layers on top of each other. This also demonstrates that a particularly stable and load-bearing structure results.

[0026] The described rolling process, or generally the creation of a continuous, externally visible bend with a bending angle greater than 200°, typically results in a relatively soft structure with a comparatively large bending radius. This radius is generally larger than that of individual, comparatively sharp developments of, for example, 90°, although comparatively sharp structures are also conceivable through rolling. Depending on the visibility of the outer edge and the installation situation, creating a continuous bend, especially one with a constant or substantially constant bending radius, can also be used for aesthetic purposes.

[0027] To achieve particularly high stability, the sheet metal can be arranged in three layers on top of each other in at least one vertical section plane, although other edge geometries are also conceivable. For example, the sheet metal can be folded multiple times or bent in on itself, resulting in a flat, at least partially three-layered structure. It is also possible, in principle, to insert an additional strip of sheet metal or similar reinforcement during the folding process, which is then permanently fixed solely by the forming process.

[0028] It should be noted that the invention provides for an enamel coating that is applied after the sheet metal forming process. Small gaps, cracks, or the like can also be filled by the enamel. This applies equally to the edge contours already described as well as those explained below.

[0029] Regarding the arrangement of at least three layers on top of each other, one can assume a known U- or C-shaped rim, in which two sections of the sheet metal run parallel to the rim contour and, in particular, in a horizontal direction. Within the scope of the invention, a third section can then be provided, which also runs essentially horizontally.

[0030] Starting from a known C-shaped edge contour, two developments can be provided, angled in the same direction or, alternatively, in opposite directions relative to the C-shape. This creates a particularly stable structure, while also generating specific gaps and spaces that are typically left unfilled during enameling if sufficient spacing is maintained. Such contours can also be used, in particular, to mount the tub body, allowing for the easy placement of components such as feet, supports, tub anchors, or the like.

[0031] According to a further aspect of the invention, it is provided that the sheet metal has an end section at the edge contour which extends predominantly in a vertical direction with respect to the mounting position of the tub body.

[0032] This means, in particular, that the angle of the end section to the vertical is less than 45°. Specifically, the angle to the vertical can be less than 30°, preferably less than 15°. The end section can also run completely or substantially vertically. Such a predominantly vertical end section can be particularly useful for fastening purposes.

[0033] More complex edge geometries can easily be formed by combining the described measures in order to achieve certain functionalities and / or to influence mechanical stability.

[0034] In the case of edge contours known from the prior art, with an L-shape, a C-shape, or a U-shape, approximately right-angled developments are generally provided, which can be more or less sharp. Outside of these developments, the sheet metal then generally runs horizontally or vertically, according to the prior art.

[0035] According to a further aspect of the present invention, the edge contour has at least one flat section that runs obliquely to the horizontal at an angle between 20° and 70°, in particular between 35° and 55°, with respect to the mounting position. This flat section can also be used as a support section to allow the tub body to be placed on a support structure with a complementary shape.

[0036] For example, a supporting structure can have a complementary wedge surface, so that the inclined profile can also achieve a certain degree of centering and / or fixation. The flat section can extend over a length of more than 10 mm, and in particular more than 20 mm, relative to a cross-section through the edge contour. In principle, flat sections facing opposite directions can also connect to each other via a radius or arc.

[0037] A key characteristic of many of the previously described edge contours is that they have more than two bends connected by straight sections. This criterion already applies to some of the previously described edge contours, whereas, for example, a C-shape known from the prior art has exactly two bends.

[0038] With more than two bending points, frame-like, i.e., initially L-shaped, edge contours can also be created, which then have a counter-bend at the end. In the case of a known upward-facing L-shape, the sheet metal edge then ends at the upper face. Such a frame can then be positioned, for example, below tiles, although a step is usually unavoidable. It should be noted that standard tiles are significantly thicker than the familiar L-shape.

[0039] If, on the other hand, the sheet metal is bent downwards again starting from the L-shape, a kind of lateral rim can be formed, which, for example, also provides a certain distance when mounted on a wall. It is then possible, for instance, to have the underlying L-shape flush with the tiles.

[0040] Even if the upper edge of such an edge contour is visibly arranged in an alternative assembly, the actual sheet metal edge is again bent downwards, resulting in a harmonious, soft and uniform bend on the edge contour that then protrudes upwards.

[0041] By using more than two bending points, other edge contours with specific advantages can be created. For example, a kind of Z-shape is also possible.

[0042] A preferred embodiment of the invention is explained in detail below, in which opposing curves join each other at a turning point. However, structures with a wave-like shape featuring multiple waves or teeth can also be provided. For example, the initially flat sheet metal can be reshaped accordingly, for instance by embossing, so that multiple waves, teeth, or the like are formed at the edge. This contour can then be bent downwards as a whole to form the actual rim of the tub body. Such a structure is characterized by particularly high stability, which can also be achieved with an overall low rim height.

[0043] Within the scope of the invention, a rectangular shape can also be created, for example. Starting from a known C-shape, it is possible, for instance, to provide a further leg that extends to the underside of the tub body, where a connection or attachment is also possible there, as described above. It is also conceivable that, through an opposing bend, an end section of the sheet metal then runs horizontally along the underside of the tub body. In particular, support or connection by adhesive, welding, or the like is then possible at such an end section.

[0044] Especially when creating a box-like shape at the edge contour, reinforcement with a suitable rod- or tube-shaped rectangular insert is quite feasible. However, it goes without saying that the stabilizing insert can have a different shape and, if necessary, its cross-section can also be adapted to a different edge contour.

[0045] Finally, the invention may also provide for further concave, convex and / or oppositely directed contours.

[0046] The described edge contours are intended to generally provide sufficient stability within the scope of the invention, whereby - as also described - other functionalities may also be provided.

[0047] Regarding the mechanical properties of the edge contour, a certain degree of elasticity is conceivable even with suitable shapes. A structure that is inherently load-bearing and resilient can, for example, exhibit a certain limited compliance under impact in order to reduce, dissipate, or distribute vibrations and loads. Similar measures are also known for other supports subjected to significant weight loads.

[0048] In principle, it is also conceivable to acoustically detune the vibrational amplitude of the tub body by means of the rim contour, thereby reducing the vibration amplitude and / or shifting the natural frequency into a less critical range. If necessary, a particularly advantageous rim contour can then be determined based on theoretical calculations and / or preliminary tests.

[0049] Depending on the design, the described edge contours are also suitable for providing particularly flat yet stable tub edges. Thanks to the preferably implemented significant stiffening, it may also be possible to achieve good stability with a relatively thin sheet metal compared to the prior art. The sheet metal thickness can, for example, range from 0.7 mm to 3 mm. A reduced sheet metal thickness can, for example, be in the range of 1 mm to 2 mm.

[0050] It is also possible, in principle, to provide openings, recesses, or similar features along the edge contour. Such openings can be used, for example, to facilitate easier fastening, save material, or for other purposes. Openings or cutouts can be created during the manufacturing process, such as by punching. Depending on the design, corresponding measures can be taken before, after, or during sheet metal forming.

[0051] According to another aspect of the invention, a filling and / or dam material can also be provided in the area of ​​the edge contour.

[0052] For example, from DE 199 61 255 A1, it is known to form a bathtub support directly on the underside of the bathtub body using plastic foam, for example, polyurethane foam. Profile strips that can be inserted into a bathtub rim are also known from DE 10 2017 105 290 B3 and DE 10 2017 105 180 A1. It is understood that, within the scope of the present invention, strips adapted to a multitude of rim contours according to the invention can be provided. Such strips can be made of rigid foam, as in the cited prior art, but other materials such as wood are also suitable. Wood, as a renewable raw material, stores carbon dioxide during its use and, after use, can optionally be reused as a building material, easily composted, or thermally recycled.

[0053] In a combination of approaches known from the prior art, strips, strip-shaped sections, frames, or the like can also be formed, which extend along the edge contour on at least a portion of the circumference of the tub body. In particular, such structures can optionally also be formed directly on the tub body and cured there. For some of the edge contours according to the invention, a firm, form-fitting fixation can be achieved, for example, if undercuts and / or constrictions are filled with a foaming material or another curing or curable material. A mycelium material, which is also known from DE 10 2022 128 990 B3, can be used as a very resistant and ecologically advantageous material. For various handling options suitable within the scope of the present invention, specific reference is made to this prior art.In principle, other hardening or curable materials are also conceivable.

[0054] As explained elsewhere, an adhesive and / or sealant can also be used to close gaps. It goes without saying that cavities and / or parts of the edge contour can also be filled.

[0055] In a known manner, in addition to separate tub supports, feet, or other supporting structures, elements can also be provided that are permanently connected to the rim contour, for example, by welding. For instance, brackets can be attached to the sides or corners, especially at right angles, of the tub body. The rim contour can then be designed to allow for a reliable connection through welding or bonding.

[0056] The edge contour can also be used, for example, to securely and / or clamp elements such as feet, supports or other attachments.

[0057] The edge contour can also be used to accommodate internal and / or external lines for electricity, water, air, or other media. Depending on the adapted shape, a partial contour can also be provided, for example, to accommodate a sealing cord, a profile seal, or the like.

[0058] According to a further aspect, the invention relates to a bathtub or shower tray with a tray body formed from enamelled sheet metal, which has a usable side, wherein the sheet metal, starting from the usable side, is bent at least section by section in an edge region to form an outer edge, in particular starting from a horizontal or substantially horizontal mirror section, in a first direction of curvature and runs with an end section displaced inwards relative to the outer edge below the usable side. According to the invention, at the end section, the course of the sheet metal changes at a first turning point from the first direction of curvature to an opposite second direction of curvature.

[0059] In this embodiment of the invention, opposite curvatures are provided, which is generally associated with increased manufacturing effort. In particular, suitable tools and forming steps must be provided to produce curvatures in opposite directions.

[0060] Within the framework of this embodiment according to the invention, an increased manufacturing effort or at least a modified manufacturing process is deliberately accepted in order to achieve various advantages with a modified structure.

[0061] Thus, the opposing curvature can result in increased overall strength. It should also be noted that bending the sheet metal causes distortions, i.e., elongations and compressions, due to the material thickness. These distortions then occur on different sides according to the respective curvature. This distribution of distortions across both sides can also lead to advantages in terms of stability.

[0062] At the same time, a certain spring-like elasticity also results from the opposing curvatures.

[0063] According to a preferred embodiment, the sheet metal extends from the usable side to the first turning point, sweeping an angle between 190° and 260°, particularly between 210° and 240°. This also results in the outer edge of the tub body being formed there, with the first turning point already offset inwards relative to the outer edge.

[0064] In principle, it is conceivable that, according to the prior art, curves and straight sections are provided up to the first turning point, corresponding to a C-shaped edge. Up to the first turning point, the curvature is then greater than or equal to zero.

[0065] According to a preferred embodiment of the invention, the sheet metal extends from the functional side in a continuous first arc to the first turning point. Accordingly, the curvature is always greater than zero in magnitude, although the radius of curvature can also change in certain areas. At least at all points, the sheet metal is bent. In particular, it can also be provided that the arc initially extends from the functional side in a predetermined radius of curvature before the curvature decreases prior to reaching the turning point, whereupon a curvature in the opposite direction is provided at the turning point.

[0066] Accordingly, the first arc can be at least partially circular with a radius between 3 mm and 7 mm, in particular 4 mm to 6 mm, for example approximately 5 mm. The radius then refers to the outside of the first arc.

[0067] According to one possible embodiment of the invention, the shape of the sheet metal changes from the second direction of curvature back to the first direction of curvature at a second turning point at the end section before the end section terminates at a sheet edge. The end section running under the usable side then has a kind of wave shape which can contribute to particularly good stability and elasticity and can also offer further advantages, as explained below.

[0068] A wave shape also results if a change of direction is only planned at the first turning point. As previously explained, a shape with multiple waves is also possible.

[0069] The described wave shape provides the end section with a groove on its underside, which can have a groove depth of, for example, between 2 and 5 mm. The groove depth refers to the lower edge of the sheet metal. It therefore indicates the depth of the indentation formed in the end section. The end section can have approximately the same height laterally as the groove, for example, to create a support surface or reference surface interrupted by the groove.

[0070] The path of the sheet metal after the first turning point, i.e., for example between the first turning point and the optional second turning point, preferably forms a continuous second arc, which can extend in particular over an angle between 60° and 150°, in particular 80° and 125°, for example about 90° or about 120°.

[0071] If the sheet metal profile also includes the optional second turning point, it is preferred that the sheet metal then forms a third, preferably continuous, arc between the second turning point and the edge of the sheet metal, extending over an angle between 30° and 60°, in particular between 40° and 50°, for example about 45°.

[0072] The tub body is made of enamelled sheet metal, i.e., steel enamel. The enamelling is preferably applied to the entire usable surface as well as the edge section. Enamelling is also provided on the edge of the tub body and, in particular, on the outer surfaces of the end section, preferably covering the entire surface, at least in the accessible areas.

[0073] Particularly between the sheet metal section forming the working side and the end section, it is possible that the enamel coating is incomplete. With the previously described wave shape, for example, it is conceivable that the enamel coating extends fully to the actual wave, i.e., the upward-facing groove, but that the enamel coating behind it may not be complete.

[0074] The wave shape, and in particular the formation of a groove, creates a constriction between the end section and the sheet metal section forming the working side. The width of this constriction depends on the height of the wave and the depth of the groove. It is possible for the end section, with its alternating curvature direction, to extend right up to the sheet metal section forming the working side. The wave shape can therefore be in direct contact with the corresponding sheet metal section, thus providing additional support.

[0075] Furthermore, a material-bonded connection is also possible, which can be created both at specific points and throughout the entire joint. For example, a continuous seam can be created by welding, whereby the formation of individual weld points or only welded sections is also possible.

[0076] With a circumferential seal, any remaining cavity is simultaneously sealed. In the case of a complete seal, it is acceptable if the metal remains bare in this area during subsequent enameling. This is because the complete seal prevents the ingress of water or other substances that promote corrosion.

[0077] Furthermore, gluing is also possible.

[0078] The base area of ​​the tub body and its overall shape are not restricted. For a base that is generally curved, for example, round, the surrounding rim can be continuous as described previously. For a standard base with corners, such as a rectangle or square, the sheet metal can advantageously have punches, cutouts, or notches at the corners to allow the adjacent sides to be bent separately into the described shape. After bending, the corners can then be welded. Additionally or alternatively, the corners can be sealed with a suitable material.

[0079] According to the invention, the described geometry is present at least partially in the edge region, with indentations, recesses, or cutouts being provided, particularly at the corners. In such cases, the entire remaining edge region may exhibit the described contour. However, the invention is not limited to such configurations. For example, individual edge sections may also have a different contour. Thus, it is possible, among other things, for individual sections, such as at least one of several mutually angled edge sections, to have a flat surface or an upwardly angled frame section. The edge geometry described above according to the invention can also be partially omitted, in particular removed, by cutting and / or partial notching.

[0080] Even if the end section of a wave-shaped profile is brought close to the sheet metal section forming the usable side, a narrowing is formed at the constriction, which can be used very well for the formation of a weld seam or weld spots as well as for the application of adhesive, a sealant, a filler material or the like.

[0081] The same applies if, according to a preferred embodiment of the invention, the wave shape or the groove is only so pronounced that a certain distance remains between the wave shape and the sheet metal section forming the usable side.

[0082] This gap can also be sealed, using a rigid adhesive as well as a sealant and / or elastomer. A bead, cord, or profile of the appropriate material can be easily inserted into the narrow space and bonded. Especially when the material partially penetrates the narrow space, a particularly strong and reliable bond is achieved.

[0083] Especially with an elastomeric or otherwise tough material, particularly advantageous damping against sound, vibrations, or oscillations in general can occur. For example, if the bathtub or shower tray is supported downwards via the end section, the weight is mainly supported by the curved sheet metal, but a separate elastomeric material or a comparable tough material can contribute to good damping.

[0084] It can be important that this damping material is positioned inwards relative to the outer edge of the tub body. For example, if the damping material is located near the free end of the end section, this creates a certain lever arm for any vibrations in relation to the bending of the sheet metal, thus enabling particularly reliable and effective damping. As described, this results in double support via the bent sheet metal on the one hand and the damping material on the other. As with other supported and damped systems, the bent sheet metal can be considered a kind of supporting spring and the damping material a kind of damper. Such damper-spring systems are known from various technical fields, such as the automotive industry and plant engineering.

[0085] Since the damping material is positioned offset inwards from the outer edge, it can already partially reduce vibrations that are transmitted horizontally along the working side. Therefore, if the working side also rests against or is connected to the outer edge of the tub body of a surrounding structure, this initial damping can already be advantageous. Naturally, effective damping is also achieved with regard to any downward contact of the tub body via the end section.

[0086] Without going into further detail, it is understood that sealing and / or elastomeric material with a sealing and / or damping function can also be used advantageously in a comparable manner for the other edge contours described above.

[0087] In particular, to achieve the properties and advantages described above, the end section can extend over a width of between 10 mm and 25 mm, especially between 15 mm and 20 mm. The width is expediently determined between the outer edge of the tub body and the free end of the end section below the usable side. When determining a suitable width, it should be noted that a narrow width may reduce the desired stabilization. Furthermore, sufficient width must be considered with regard to the manufacturing and usability of the wave shape. A large width results in increased material requirements. Nevertheless, the invention is not limited to the preferred value ranges.

[0088] The described opposing bend and preferably wave shape of the end section can also be advantageous for connecting to an underlying support structure. For example, if, according to the prior art DE 102012 111 579 B4, a bathtub or shower tray is supported only at the edge without a separate foot, a type of adhesive tape or similar can be used for this purpose. In a cross-sectional view, this can result in a uniformly flat surface.

[0089] However, if there is a certain degree of waviness around the perimeter of the bathtub rim and / or the substrate, there is a risk of inadequate or improper bonding.

[0090] The alternating curvature, particularly that provided in the form of a wave according to the invention, can also be used in this context to provide a space for expansion and compensation of an adhesive material. For example, the bond in the area of ​​the groove formed by the wave shape can be created with a bead that projects downwards beyond the groove but does not completely fill the groove in height and width. This projection of a bead ensures a secure bond and seal even if a gap remains locally between the tub body and the substrate. If, on the other hand, the tub body rests directly on the substrate, gaps remain into which the adhesive and sealant can then expand.

[0091] The described wave shape and the formation of a groove can also be used for centering. For example, strips can be provided with a kind of rib as a support, which then engages complementarily in the groove and thus enables precise centering.

[0092] The groove is located at a clearly defined position on the outer edge of the tub body. This makes it possible, for example, to first precisely align a supporting structure, and then to place the tub body on it in such a way that a positive locking mechanism is achieved in the horizontal direction by engaging a projection or rib in the groove.

[0093] Finally, a mounting bracket or similar element can be inserted between the end section and the sheet metal section forming the usable side. Due to the described wave shape and the associated degree of elasticity, such elements can also be easily clamped in place.

[0094] Within the scope of the invention, the wave shape is of particular importance with regard to the contour formed on the underside of the end section with the groove, as well as the formation of a tapered constriction. In addition to the advantages and design possibilities already mentioned, further additional aspects that can be provided additionally or alternatively are listed below.

[0095] The contour with the groove formed on the underside of the end section can also be used to correctly position not only a load-bearing structure, but generally any element with a suitable complementary and / or adaptable structure. For example, an insulating profile, perhaps made of a foam material, can be provided which engages in the groove with a projection and can therefore be aligned in a particularly simple way.

[0096] When the contour is used for bonding, for example when bonding with a flat sealing tape, a greater width is achieved compared to a flat surface, which can then be used for the connection. With a material applied as a bead or strand and still flowable or deformable, areas can also occur—as described—that are free for expansion or deformation, and a particularly good bond can still be achieved in these cases. A change in the direction of the sheet metal can also contribute to a particularly reliable bond compared to a flat surface.

[0097] The previously described constriction widens towards the center of the tub body, i.e., inwards. This wedge shape can be used effectively—as previously described—to insert a bead of sealing and / or elastic material that is also deformable and / or flowable. For example, a strip of foamed material can also be inserted, which is then compressed by the insertion process. If a deformable and / or flowable material is inserted beyond the constriction, a permanent, potentially removable or permanent, form-fit connection can then be created through springback and / or hardening.

[0098] It is also conceivable to use material strips that already have a modified wedge shape. Elements and structures that can be clamped and / or secured with a snap-fit ​​connection in the narrow section are also suitable. Furthermore, elements such as bathtub anchors or similar can be inserted into the narrow section with some play. For example, a bathtub anchor is typically secured by an outward pull or by its fixed position against a wall in the narrow section.

[0099] As previously explained, it can be advantageous to close the constriction, for example, to seal the inner area covered by the first arch. In addition to or as an alternative to material introduced into the constriction, at least the end of the final section can be covered with adhesive tape, a sealing membrane, a sealing strip, or the like. If additional material is introduced into the constriction, it can then also be used as a base and / or support surface for a suitable layering material.

[0100] If indentations, recesses or cutouts are provided in the area of ​​corners, these areas can also be filled and / or covered as described above.

[0101] The invention is explained below with reference to exemplary drawings.

[0102] They show: Fig. 1 a shower tray according to the invention, Fig. 2 a bathtub according to the invention, Fig. 3 a detailed view of a marginal area of ​​the in the Fig. 1 and Fig. 2 depicted bathtub bodies, Fig. 4 to Fig. 7 the edge area according to the Fig. 3 in different configurations or installation situations, Fig. 8 compared to Fig. 3 alternative designs for the edge area, Fig. 9 and Fig. 10 the edge area according to the Fig. 8 in different configurations or installation situations, Fig. 11. An underside view of the shower tray at a corner of the tub, Fig. 12 to 14 who are in the Fig. 11 bathtub corners shown in different configurations, Fig. 15a to 15f Edge contours that can be formed by a rolling tool, Fig. 16a to 16e Edge contours with three vertically superimposed layers of sheet metal, Fig. 17a to 17t further alternative edge contours provided within the scope of the invention, Fig. 18a, Fig. 18b Edge contours according to the invention in a perspective sectional view, Fig. 19 another alternative edge contour, Fig. 20a to 20c Steps to forming the in Fig. 19 shown edge contour.

[0103] The Fig. Figure 1 shows a shower tray with a tray body 1 formed from enamelled sheet metal. The tray body 1 has a usable side 2 which can be entered by a user and which directs the water towards a drain opening 3.

[0104] On the user side 2, in the exemplary embodiment of the Fig. 1. A circumferential, horizontal or substantially horizontal mirror section 4 is formed in the edge region of the tub body 1. For illustrative purposes, the mirror section 4 is also delimited from a recess 5 of the usable side 2 by radii transitions. However, the usable side 2 can also be flat, i.e., horizontal, at least partially without clearly recognizable transitions, in which case the mirror section 4 is also present as a substantially horizontal area, but is not clearly delimited from a separate recess 5. With regard to the other aspects of the present invention, however, the precise shape of the usable side 2 is of only minor importance, and the invention is universally applicable.

[0105] Already in Fig. 1 can be seen that, in order to form an outer edge 6 of the tub body 1, the sheet metal is bent in a first curvature direction starting from the mirror section 4 and runs with an end section 7 shifted inwards relative to the outer edge 6 below the usable side 2.

[0106] Already in Fig. 1 can be seen that at the end section 7 the shape of the sheet metal forms a kind of wave shape.

[0107] The Fig. Figure 2 shows an alternative design of the shower tray, which here forms a bathtub. Otherwise, a comparable structure results in the edge area of ​​the tub body 1, so reference is made to the details of the Fig. 1 can be referred to.

[0108] The Fig. Figure 3 shows a detailed view of the edge area, where the enameling on the sheet metal is not shown separately.

[0109] According to the Fig. Figure 3 shows that, starting from the mirror section 4, the sheet metal extends from the usable side to a first turning point 8 in a continuous first arc 9, the first arc 9 extending over an angle of approximately 225°.

[0110] While at the beginning of the first arc 9 a circular arc section with a radius of, for example, 5 mm (relative to the outside of the first arc 9) is provided up to an angle of over 180°, the curvature decreases before the first turning point 8, before a second arc 10 with an opposite second curvature direction then follows at the first turning point 8.

[0111] In the illustrated example, the second arc 10 extends over an angle of approximately 90° and has a radius of approximately 4 mm relative to the outside of the second arc 10. A second turning point 11 is then provided, whereby the sheet is again curved along the first direction of curvature and forms a third arc 12, which extends over an angle of approximately 45° before the end section terminates at a sheet edge 13.

[0112] The described wave shape forms a groove 14 on the underside in the area of ​​the second arc 10, which can, for example, have a depth of 3 to 4 mm.

[0113] In particular, the design of the second turning point 11 is optional within the scope of the invention. A comparable shape with the groove 14 also results if the end section 7 terminates with the second, then possibly less strongly curved arcs 10 or a straight section adjoining the second arc 10.

[0114] The total height h of the tub body 1 at the edge area can be, for example, between 8 mm and 18 mm, in particular about 10 mm.

[0115] The Fig. The wave shape shown in section 3 does involve a certain increase in manufacturing effort because the sheet metal has to be bent in different ways at the end section 7. However, the design of the groove 14 also results in particularly high strength, and the area also exhibits a certain elasticity similar to a spring.

[0116] The specific advantages that arise from this are also explained by way of example in connection with the following figures.

[0117] The wave shape creates a constriction 15 between the groove 14 or the second arc 10 on the one hand and the sheet metal section forming the usable side 2 on the other.

[0118] According to the Fig. In section 4, a sealing and / or elastomeric material 16 is introduced in the area of ​​the constriction 15. A material that is both dense, in particular waterproof, and also elastically or toughly deformable to a certain degree is particularly preferred. Various viscous or rubber-like materials based on acrylic, silicone, or butyl are known, for example; such materials are familiar to those skilled in the art. Polymer resins, which can exhibit a certain degree of softness and / or elasticity depending on the requirements, can also be considered.

[0119] The sealing and / or elastomer material 16 can be introduced particularly easily in the area of ​​the constriction 15. For example, it is possible to introduce the sealing and / or elastomer material 16 as a cord, a curing strand, or the like. The sealing and / or elastomer material 16 can also be pressed onto or into the constriction 15, resulting in a particularly strong and reliable bond. Adhesive bonding of the sealing and / or elastomer material 16 also results in advantageous two-sided adhesion, which allows sufficient flexibility and thus a high service life.

[0120] The sealing and / or elastomeric material 16 can also contribute to particularly effective damping against sound, vibration, or oscillations in general. For example, if the tub body 1 is supported downwards by the end section 7, the shape of the sheet metal, especially with the first arc 9, forms a kind of spring, while the sealing and / or elastomeric material 16 can then form a kind of damping element.

[0121] Further configurations and assembly situations are explained below. It should be understood, however, that the described measures can also be used in combination with one another.

[0122] The Fig. Figure 5 shows a purely schematic possible installation situation, in which the tub body is arranged in a recess 17 of a floor surface 18 and rests directly on it with the end section 7.

[0123] For placement in the recess 17, an adhesive bead 19 is provided in the area of ​​the groove 14; this bead can also be made of the same material as the previously described sealing and / or elastomer material 16. The adhesive bead 19 does not completely fill the area of ​​the groove 14.

[0124] If the adhesive bead 19 is initially provided in an approximately circular cylindrical shape, it protrudes downwards beyond the groove 14. If then – unlike in the Fig. 5 - if, due to a certain waviness of the end section 7 and / or the recess 17, there is no direct contact between the end section 7 and the recess 17 in certain areas, any remaining gap can then be bridged by a suitably shaped bead of adhesive 19, thereby ensuring a secure fastening. However, if - as the Fig. 5 shown - where the end section 7 rests directly in the recess 17, free spaces are created in the area of ​​the groove 14 in the vertical and horizontal direction, into which the adhesive bead 19 can spread.

[0125] The Fig. Figure 6 shows schematically that the groove 14 can also be used for centering with an underlying support structure 20. The support structure 20, in the form of a single beam or individual strips, can, for example, have a rib 21 on its upper side that engages in the groove 14.

[0126] Finally, the Fig. 7, that the narrow passage 14 can also be used for fastening, in particular clamping, other components. By way of example, the Fig. 7 a mounting bracket as part of a support structure 20, which is inserted into the narrow passage 14 in a clamping manner.

[0127] The Fig. Figure 8 shows an alternative embodiment of the edge region according to the invention, wherein only the first turning point 8 is provided at the end section 7. Starting from the mirror section 4, the sheet metal extends from the usable side to the first turning point 8 in the continuous first arc 9, the first arc 9 extending over an angle of approximately 225°.

[0128] At the first turning point 8, the second arc 10 connects with the opposite second direction of curvature.

[0129] In the example shown, the second arc 10 extends over an angle of approximately 120° and has a radius of approximately 5 mm relative to its outer surface. A straight section 23 adjoins the second arc 10.

[0130] The described wave shape forms the groove 14 on the underside and the constriction 15 in the area of ​​the second arc 10.

[0131] The Fig. 9 shows starting from the Fig. 8 a possible mounting configuration, which can also be used in the same way with an edge geometry according to the Fig. 3 may be provided.

[0132] Below the edge section 7, an insulating strip 24 is arranged, the upper surface of which has a shape complementary to the groove 14. For example, the insulating strip 24 can be made of a foamed plastic. The complementary shape of the groove 14 and the insulating strip 24 facilitates correct alignment, even if the insulating strip 24 is subsequently installed as an optional accessory. The complementary shape also results in particularly large and uniform support. The insulating strip 24 can be either loosely inserted or fastened, for example, using an adhesive (not shown). The insulating strip 24 can be used, in particular, as a soundproofing profile for sound decoupling or insulation.

[0133] In the Fig. Figure 9 further shows an optional additional or alternative arrangement of a strip 25 in the form of an adhesive tape or sealing tape, indicated by a dashed line. The strip 25 can be used with or without the previously described insulating strip 24 to cover and seal the edge section 7. A relatively sharp edge on the sheet metal edge 13 can be covered, and the previously described arrangement of the insulating strip 24 can also be advantageous here.

[0134] Strip 25 can be used according to the Fig. 9 can also be used to connect the tub body 1 with a free end of the strip 25 tightly to an adjacent wall or floor surface. However, if the free end of the strip 25 is not required for another type of sealing, a predetermined separation point 26 can optionally be provided. The predetermined separation point 26 can, for example, be designed as a material weakening and / or as a marking.

[0135] According to the Fig. 10 is starting from the Fig. 8 and accordingly Fig. 4. Sealing and / or elastomer material 16 is arranged in the area of ​​the constriction 15. The sealing and / or elastomer material 16 is shaped in such a way that the strip 25, which is also provided here and provided with an adhesive layer 27, can connect directly to it. Several possibilities exist for achieving the structure shown. For example, the sealing and / or elastomer material 16 can be inserted into the constriction 15 as a pre-formed profile. Alternatively, the initially flowable and / or deformable sealing and / or elastomer material 16 can be shaped as it is inserted into the constriction 15 before the strip 25 is subsequently applied. Finally, the initially flowable and / or deformable sealing and / or elastomer material 16 can also be shaped by applying the strip itself.With regard to a manufacturing process, the advantage can arise that the sealing and / or elastomer material 16 is protected by the strip 25, even if the sealing and / or elastomer material 16 is comparatively soft and / or not yet cured. As in connection with the . Fig. As shown in 9, the stripe can optionally be continued outwards.

[0136] The Fig. Figure 11 shows the tub body 1 in the area of ​​a tub corner 28. This ensures that the end section 7 is attached to the two sides 29 leading to the tub corner 28 as described above, i.e., in particular as in Fig. 3 and Fig. As shown in Figure 8, the sheet metal of the tub body 1 is provided with a recess 30 in the area of ​​the tub corner 28, which runs approximately in a V-shape after the sheet metal forming.

[0137] If, according to one embodiment of the invention, the end section 7 is covered by the strip 25 (see also Fig. 9 and Fig. 10), this can be done as in Fig. 12 also covers the recess 30, wherein the strip 25 is angled in the area of ​​the tub corner and may in particular be formed from two joined, for example glued, pieces.

[0138] The Fig. Figure 13 shows a further embodiment, in which, as in the Fig. 4 and the Fig. 10 the sealing and / or elastomeric material 16 fills the area of ​​the constriction 15. The sealing and / or elastomeric material 16 also fills the recess 30 in such a way that the cavity formed on the inside by the first arc 9 is closed at the end of the recess 30.

[0139] According to the Fig. 14 The entire recess 30 is filled with the sealing and / or elastomeric material 16. It can also be provided that the sealing and / or elastomeric material 16 is flush or substantially flush with the end section.

[0140] Of course, this can also be done in the Fig. 13 and Fig. 14 illustrated designs in addition to those shown in the Fig. The 12 depicted stripes will be applied in 25 layers.

[0141] The Fig. Figures 15a to 15d show exemplary edge contours according to the invention, which can be produced by rolling the sheet metal.

[0142] This is in the Fig. Figure 15a shows an exemplary rolling tool 31. The rolling tool 31 is depicted at a distance from the trough body 1. However, it is understood that the rolling tool 31 can be brought close to the edge for forming the sheet metal. Starting from an initially flat sheet, the sheet can then be rolled in by a feed movement.

[0143] According to the Fig. 15a then results in a continuous bend with a bending angle of more than 200°, with a bending radius that is also essentially constant.

[0144] Based on this, the Fig. 15b is a variant where the bending radius is in the range of 360°. The sheet edge 13 then extends along the edge contour to the sheet section that also forms the working side 2 on the opposite side. Mechanical support is then also possible. It is understood that a material-bonded connection by welding, the previously described sealing and / or elastomeric material 16, or the like is possible.

[0145] In principle, it is also conceivable that a small gap is already closed by the enamel during the application of the enamel.

[0146] The Fig. Figure 15c shows a further embodiment in which the edge contour has a continuous bend with a bending angle of more than 360°. The sheet is, in effect, rolled up, so that a particularly stable, rigid structure can be formed. The sheet edge 13 is also guided by the adjacent layer of sheet during the forming process, whereby the bending radius decreases in the direction of the sheet edge 13.

[0147] The Fig. Figure 15d shows a variant in which a stabilizing insert 32 is provided in the area of ​​the edge contour. This stabilizing insert 32, in the form of a round bar, can simply be inserted on the inside during sheet metal forming. The remaining edge contour is shaped accordingly. Fig. 15b executed, but also edge contours according to the Fig. 15a and Fig. 15c can be provided with the stabilizing insert 32 in the same way.

[0148] The Fig. Figure 15e shows an edge contour which can be formed by a rolling tool and on which a volume material 22 is further arranged on the underside of the tub body 1. This can be, for example, a foam material, in particular plastic foam, a mycelium material or another cured mass. In the exemplary embodiment of the Fig. 15e The bulk material 22 fills a cavity in the edge contour and extends out of the cavity through a constriction. The bulk material, which in this embodiment is provided in a strip-like form only at the edge of the tub body 1, is thereby also held in a form-fitting manner.

[0149] The Fig. Figure 15f shows an edge contour corresponding to the Fig. Figure 15e shows a perspective section view from below. Exemplary cutouts 43 are formed in the edge contour, through which a conductor, reinforcement, or the like (not shown) can be inserted into the edge contour.

[0150] Additionally or alternatively, expanding profiles or elements can also be considered, which can then be used and fixed without a notch.

[0151] According to the Fig. Figure 15c also shows that three layers of sheet metal are arranged one above the other in a vertical direction, which can contribute to particularly good stability. Similar stabilization can also be achieved in other ways, for which reference is made to the Fig. Reference is made to sections 16a to 16e.

[0152] According to the Fig. Figure 16a shows an edge contour in which the sheet metal is essentially flat and laid on top of each other in three layers, with the sheet metal edge 13 then located on the inside. By applying an enamel coating, the Fig. The edge contour shown in 16a can also be sealed. For larger gaps that cannot be sealed by enameling, the sealing and / or elastomer material 16 can be used, as described above.

[0153] The Fig. 16b shows starting from the Fig. 16a a variant in which a further strip is inserted as a stabilizing insert 32 and is formed with the sheet metal.

[0154] Based on the Fig. 16a shows the Fig. 16c a variant in which the sheet metal is folded in the opposite direction towards the sheet metal edge 13 at a final bend, so that the sheet metal edge 13 is then exposed on the underside.

[0155] Based on the Fig. 16a and Fig. 16c show the Fig. 16d and Fig. 16e variants in which the three superimposed sections of the sheet metal each have a distance from each other.

[0156] Such an edge contour also represents a further development of a known C-shape with two additional bends.

[0157] The Fig. Figures 17a to 17m show further edge contours suitable within the scope of the invention.

[0158] According to the Fig. 17a, starting from a known C-shape, provides for an additional downward bend towards the edge of the sheet metal 13. This forms a kind of flag, which can also be used, for example, for assembly and fastening purposes.

[0159] The Fig. 17b shows that a corresponding design can also be achieved starting from a rolled edge according to the Fig. 15A may be provided, in which case a complex type of forming may be necessary. As an example, a flat section 33 with a length of more than 10 mm is provided. However, the corresponding leg can also be formed as in the Fig. 17a run vertically or substantially vertically.

[0160] The sloping, flat section 33 can, for example, be used for assembly purposes. Fig. 17c and Fig. Figure 17d shows variants in which the inclined, flat section 33 is arranged on a supporting structure 20 that has a complementary shape. The inclined orientation also allows for a certain degree of fixation and / or centering.

[0161] The Fig. In this context, 17e shows that several level sections 33, 33' may also be provided.

[0162] The Fig. 17f and Fig. Figure 17g shows an initially L-shaped edge contour extending downwards or upwards from the usable side, with a counter-bend provided in each case according to the invention. This counter-bend can also be used to define a lateral distance, to attach elements, or to form a high-quality visible or connecting edge.

[0163] The Fig. 17h and Fig. Figure 17i shows that the edge contour can also be Z-shaped, and the forms shown can also be designed for adapted support structures 20. In particular, the edge contour according to the Fig. 17h, the shape of the edge contour creates a free space on the outside of the tub body 1, which can be used to advantage. For example, sealing profiles, pipes, or the like can be inserted there. The horizontal rib provided there in front of the sheet metal edge 13 can also be used, for example, for the simple and secure attachment of a sealing tape.

[0164] The Fig. 17l and Fig. Figure 17m shows box-shaped edge contours, where the sheet metal edge 13 is then bent in the opposite direction under the tub body 1. According to the Fig. A stabilizing insert 32 in the form of a square tube is provided at 17m.

[0165] The Fig. Figure 17j shows a partially concave edge contour with a changing direction of curvature. With such an edge contour, a sharp bend can be achieved starting from the usable side 2, while the edge contour still provides high stability and, compared to a flat tub rim, an increased installation height. The concave curvature can also be advantageously used for assembly or sealing purposes. For example, a sealant applied for edge sealing can form a kind of bubble, thereby contributing to a large-area and, depending on the material and specifications, reliable seal. The familiar method of injecting a narrow gap of constant width (standard silicone joint) does not provide a comparable level of reliable sealing. The concave section can also be used, additionally or alternatively, to insert a cord-shaped insulating and / or sealing material.

[0166] The Fig. 17k shows an edge contour which, although it has a medium mounting height, is nevertheless sealed to the inside and outside after enameling or can be easily sealed.

[0167] The Fig. Figures 17n to 17p show another suitable edge contour, with the sanitary tub being mounted in different ways. According to the Fig. 17n incorporates a profile strip 38 as a supporting element on the edge contour, as is known from DE 10 2017 105 290 B3.

[0168] According to the Fig. 17o is the edge contour according to the Fig. 17c is supported by a load-bearing structure. Finally, according to the Fig. 17p the tub body with a flat ridge of the edge contour on a substrate.

[0169] The Fig. 17q and Fig. Figure 17r shows a wider edge contour, which has a chamfer on the upper side adjoining the usable side 2. Fig. Figure 17q shows the arrangement on a building wall 39, wherein a decorative pre-wall element 41 is simply placed on a flexible sealing profile 40 and is then held particularly securely and simply by the shape of the edge contour, at least on its underside. Fig. Figure 17r shows a type of prefabricated cabin 42, which preferably extends substantially around the circumference of the tub body and can then be positioned correctly directly by means of the edge contour. A seal between the cabin 42 and the tub body 1 can be made in the usual way, whereby a customized sealing profile (not shown) can also be used.

[0170] The Fig. Figure 17s shows an edge contour that runs concavely on the outside of the tub body, for example to accommodate a sealing profile 40'. A convex profile can, for example, serve to provide a kind of spacing function or a defined gap section 43.

[0171] It was previously explained that the boundary contour can vary around the perimeter. Different boundary contours can be combined, and a single boundary contour can also have different sections along its length. The following is an example: Fig. 18a and Fig. 18b referred.

[0172] According to the Fig. 18a The sheet metal edge of a simple box-shaped structure is provided with tooth-shaped recesses 34, resulting in several spaced-apart contact points 35. At the contact points 35, a connection by adhesive and / or welding is possible – as already described for other embodiments.

[0173] The Fig. Figure 18b shows that openings 36, 36' can also be provided in the area of ​​the edge contour. These can, for example, also be intended for fastening purposes. The openings can be used, for example, during the manufacture of the sanitary bathtub to suspend it. The openings can also be useful, for example, to attach further elements and components. Corner brackets, foot elements, or the like can be attached to the openings.

[0174] The Fig. 19 shows in a further training course, for example in the Fig. The waveform shown in section 3 has an edge contour with several waves.

[0175] Possible manufacturing steps are included in the Fig. 20a to Fig. 20c is shown purely schematically. For example, in sheet metal forming, it is possible to first create a wave structure with a forming tool 37, whereby the final edge contour is then produced by bending the generated wave structure (see ). Fig. 20c). 1 bathtub body 2 user page 3 Drainage opening 4 Mirror section 5 troughs 6 outer edge 7 Final Section 8 first turning point 9 first bow 10 second bow 11 second turning point 12 third bow 13 Sheet metal edge 14 grooves on the underside 15 Narrow point 16 Sealing and / or elastomer material 17 Further Study 18 floor area 19 Glue bead 20 Supporting structure 21 rib 22 Volume material 23 straight section 24 insulation strips 25 strips 26 Determined separation point 27 adhesive layer 28 Bathtub corner Page 29 30 recess 31 rolling tool 32 stabilizing insert 33 level section 34 cutouts 35 mooring points 36 openings 37 Forming tool 38 Profile strip 39 Building wall 40 Sealing profile 41 Wall element 42 cabin 43 Slit section 44 Disconnection QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2017 105 290 B3 [0011, 0052, 0167] DE 20 2011 001 006 U1

[0011] DE 20 2012 103 906 U1

[0011] EP 2 289 379 A2

[0011] EP 3 045 094 A1

[0011] DE 10 2016 108 128 A1

[0012] DE 10 2019 120 066 A1

[0012] EP 3 298 938 A1

[0012] DE 103 11 845 B3

[0012] DE 10 2019 106 040 A1

[0012] EP 3 453 296 A1

[0013] DE 101 55 021 B1

[0013] DE 7223897 U

[0014] DE 10 2012 111 579 B4 [0014, 0088] DE 199 61 255 A1

[0052] DE 10 2017 105 180 A1

[0052] DE 10 2022 128 990 B3

[0053]

Claims

[1] Bath or shower tray with a tray body (1) formed from enamelled sheet metal, wherein at least one useful side (2) and an outer edge of the tray body (1) are provided with an enamel coating, wherein the sheet metal is bent at the outer edge with an edge contour, characterized by that the edge contour deviates from an L-shape, a C-shape and a U-shape. [2] Bath or shower tray according to claim 1, characterized by that the edge contour has a continuous bend with a bending angle of more than 90°, preferably more than 100°, in particular more than 200°. [3] Bath or shower tray according to claim 2, characterized by that the continuous bend has a bending angle of more than 340°, preferably more than 360°. [4] Bath or shower tray according to claim 2 or 3, characterized by that the edge contour is formed entirely or essentially from the continuous bend. [5] Bath or shower tray according to one of claims 2 to 4, characterized by that the continuous bend has a constant or substantially constant bending radius. [6] Bath or shower tray according to one of claims 1 to 5, characterized by that the sheet metal is arranged in sections in at least one vertical sectional plane in three layers one above the other with respect to an assembly position on the edge contour. [7] Bath or shower tray according to claim 1, characterized by that the sheet metal has an end section at the edge contour which extends predominantly in the vertical direction with respect to an assembly position of the tub body (1). [8] Bath or shower tray according to claim 1, characterized by that the edge contour has at least one flat section (33) which runs obliquely at an angle between 20° and 70°, in particular between 35° and 55°, to the horizontal with respect to the mounting position. [9] Bath or shower tray according to claim 8, characterized by that the flat section (33) extends over a length of more than 10 mm, in particular more than 20 mm. [10] Bath or shower tray according to claim 1, characterized by that the edge contour has more than two bending points which are connected by straight intermediate sections. [11] Bath or shower tray according to claim 10, characterized by that the edge contour has an opposite bending direction at at least two of the consecutive bending points. [12] Bath or shower tray according to one of claims 1 to 11, characterized by that a stabilizing insert (32), in particular in the form of a rod or tube, is provided in the region of the edge contour. [13] Bath or shower tray according to one of claims 1 to 12, characterized by that the sheet has a thickness between 0.7 mm and 3 mm, in particular between 1 mm and 2 mm. [14] Bath or shower tray according to one of claims 1 to 13, characterized bythat the sheet metal at the edge contour connects to an underside of a usable area of ​​the tub body at at least one connection point. [15] Bath or shower tray according to claim 14, characterized by that there is a material connection at at least one connection point. [16] Bath or shower tray according to claim 1, characterized by that the sheet runs below the useful side (2) with an end section (7) displaced inwards relative to the outer edge (6), wherein at the end section (7) the course of the sheet changes at a first turning point (8) from the first direction of curvature to an opposite second direction of curvature. [17] Sanitary tub according to claim 16, characterized by that the course of the sheet from the useful side (2) to the first turning point (8) covers an angle between 190° and 260°, in particular between 210° and 240°. [18] Sanitary tub according to claim 16 or 17, characterized bythat the sheet runs from the useful side (2) in a continuous first curve (9) to the first turning point (8). [19] Sanitary tub according to claim 18, characterized by that the first arc (9) is at least partially circular in shape with a radius between 3 mm and 7 mm. [20] Sanitary tub according to one of claims 16 to 19, characterized by that at the end section (7) at a second turning point (11) the course of the sheet changes from the second curvature direction back to the first curvature direction before the end section (7) ends at a sheet edge (13). [21] Sanitary tub according to claim 20, characterized by that the sheet forms a third arc (12) between the second turning point (11) and the sheet edge, which extends over an angle between 30° and 60°, in particular between 40° and 50°. [22] Sanitary tub according to one of claims 16 to 21 characterized bythat the end section forms a groove (14) on the underside with a groove depth between 2 mm and 5 mm. [23] Sanitary tub according to one of claims 16 to 22 characterized by that the course of the sheet after the first turning point (8) forms a second arc (10) which extends over an angle between 60° and 150°, in particular between 80° and 125°.

Images