Fixing device, system with toilet seat component and fixing devices and toilet seat riser

Abstract

Fastening device (1) for fastening a toilet seat component (2) to a toilet bowl (3) with prepared recesses (4, 5) for fastening the toilet seat component (2), wherein the fastening device (1) comprises a screw (6) with a screw head (7) and with a screw thread (8), a dowel (9) with a neck portion (11), and a sleeve (17) received via the screw thread (8), wherein the screw (6) passes through the dowel (9) and the sleeve (17) so that, upon an externally induced rotational movement of the screw (6) relative to the sleeve (17), the sleeve (17) can be displaced in the axial direction along the screw (6), wherein the sleeve (17) has an expanded portion (19), wherein the expanded portion (19) and a plurality of movably designed dowel arms (13-16) of the dowel (9) can be brought into mutual contact,so that, depending on the extent of displacement of the sleeve (17) in the direction of the screw head (7) by the rotational movement of the screw (6) in a first direction of rotation of the screw (6), the dowel arms (13-16) can be adjusted outwards to different extents from an initial position of the fastening device (1) applied to the dowel (9), and the dowel arms (13-16) can be adjusted inwards by a displacement of the sleeve (17) in the direction away from the screw head (7) by a rotational movement of the screw (6) in a second direction of rotation of the screw (6), characterized in that the sleeve (17) has stop means (28) matched to a dowel arm (13-16), which, when the screw (6) rotates relative to the dowel (9), prevents or limits a joint rotational movement of the screw (6) and the sleeve (17) due to the sleeve (17) being carried along by the screw (6), in that the stop means (28) come into contact with a dowel arm (13-16), , wherein the elongated, slender dowel has a widened or enlarged flat head at the top, which is, for example, flange-like, to the remaining part of the dowel adjoining it on one side or downwards with a neck section and dowel arms, wherein the sleeve comprises an outer sleeve base body made of plastic, with the expansion section on the outside, with an internal thread matching the external thread of the screw, wherein the dowel has a head section and the dowel arms are present on the side of the neck section facing away from the head section, wherein a collar of the dowel is formed between the neck section and the dowel arms, which collar has an external dimension that is larger than an external dimension of the neck section, so that the dowel is designed such that the fastening device can be secured against being pulled out upwards in the longitudinal direction when inserted into the toilet seat component.

Description

State of the art

[0001] Bathrooms and toilets, for example, for elderly and disabled people, require special, sophisticated designs to enable safe use of the sanitary facilities without the need for outside assistance. In addition to design, functionality and quality are crucial product features.

[0002] When it comes to components that are attached to toilet ceramics, such as raised toilet seats, product designers are just as in demand as scientists, doctors, and users themselves. Ease of handling of the toilet seat during assembly, disassembly, and cleaning is therefore of key importance. For example, with sanitary components such as a toilet seat or raised toilet seat, it is essential that the toilet seat component is firmly attached to the toilet ceramic during continuous use. Object and advantages of the invention

[0003] The object of the present invention is to provide an improved connection of a toilet seat component, such as a bridge of a raised toilet seat, to a toilet bowl. In particular, the toilet seat component should be easy to assemble and disassemble. The attachment of the toilet seat component to the toilet bowl should be characterized by a high degree of reliability and a permanently secure fixation of the toilet seat component, even with frequent use of the toilet seat.

[0004] This task is solved by the independent claims.

[0005] The dependent claims are directed to expedient and advantageous embodiments of the invention.

[0006] The invention relates to a device for fastening a toilet seat component to a toilet bowl with prepared recesses for fastening the toilet seat component, in particular to a toilet seat component fastening device.

[0007] In the following, the terms "device" and "fastening device" are used synonymously. The fastening device is preferably designed as a plug-in element, in particular as a screw-dowel fastening element.

[0008] The device comprises a screw with a screw head and a screw thread, a dowel with a neck section, and a sleeve received via the screw thread, wherein the screw passes through the dowel and the sleeve, so that upon an externally induced rotational movement of the screw relative to the sleeve, the sleeve can be displaced in the axial direction along the screw, wherein the sleeve has an expansion section, wherein the expansion section and several movably designed dowel arms of the dowel can be brought into contact with one another, so that depending on the extent of displacement of the sleeve in the direction of the screw head by the rotational movement of the screw in a first rotational direction of the screw, the dowel arms can be adjusted outwards to different extents from an initial position of the device applied to the dowel, and the dowel arms can be adjusted inwards,by displacing the sleeve in a direction away from the screw head by rotating the screw in a second direction of rotation of the screw.

[0009] The device is in particular an elongated screw-dowel device with which a clamping connection can be set up. With the dowel arms widening when the screw is turned, with the toilet seat component attached to the toilet seat and the inserted fastening device extending through the toilet seat component and the prepared recess in the toilet seat, the toilet seat component, through which the fastening device extends, is fastened to the toilet seat. The dowel arms are present, for example, in the area below the respective prepared recess, projecting downwards on a comparatively thin flat area of ​​the toilet bowl. By widening or spreading the dowel arms under the flat area, the fixing of the toilet seat component to the toilet bowl is achieved. If the dowel arms are in e.g.If the anchors engage a recess formed as a blind hole, the fixing is carried out by pressing all dowel arms of a respective fastening device firmly against the inner walls of the respective prepared blind hole or by setting up the clamping connection with the screw firmly tightened.

[0010] The fastening device is preferably multi-part and, in addition to the screw, preferably has two or three additional parts, and is, for example, disassemblable into its individual components. The dowel is preferably a single piece. The dowel and at least one base body of the sleeve are preferably made of a plastic.

[0011] The elongated, slender dowel has a flat, widened head or dowel head at the top, which is, for example, flange-like, connected to the remaining part of the dowel, which adjoins it at one side or downwards, with a neck section and dowel arms. The head has an enlarged outer dimension or an enlarged outer diameter compared to an opening, such as a slotted hole in the toilet seat component, into which the fastening device is inserted from above to attach the toilet seat component to the toilet seat.

[0012] To ensure easy insertion into the recess in the toilet bowl, the external dimensions of the dowel in the area of ​​the attached dowel arms are slightly smaller than the dimension or diameter of the prepared recess in the toilet bowl in the starting position of the device. During assembly, the toilet seat component is placed on top of the flat area of ​​the toilet bowl with the device pushed through, whereby the recesses exist in the flat area, and is positioned on the recesses so that an opening in the toilet seat component is aligned with a prepared recess in the toilet bowl. The fastening device is first inserted from above into the opening in the toilet seat component with the sleeve facing forward, if necessary with the screw thread protruding centrally at the bottom, and then into the corresponding prepared recess in the toilet bowl.The head of the dowel rests with its underside on the edge around the respective opening in the toilet seat component. Preferably, exactly two openings are provided in the toilet seat component, for exactly two fastening devices, since exactly two pre-prepared recesses are provided in the toilet bowl as standard.

[0013] The prepared recesses in the toilet bowl, which are adapted to a width of the toilet seat component and spaced apart from one another, are in particular identical to one another, preferably cylindrical through holes which are aligned vertically when the toilet bowl is in use.

[0014] The through-hole in the anchor for the screw extends centrally through the head of the anchor, the neck section, and the area of ​​the anchor arms. When the screw is inserted into the anchor from above as far as it will go, the screw head can be countersunk, preferably flush with the top surface of the flattened top surface of the anchor head. The screw head rests on a stop in the through-hole of the anchor near the head of the anchor.

[0015] The sleeve also has a through hole through which the screw or threaded section passes, which is aligned with the through hole of the dowel.

[0016] The core of the invention lies in the fact that the sleeve has stop means adapted to a dowel arm, which, when the screw rotates relative to the dowel, prevents or limits a joint rotational movement of the screw and the sleeve due to the screw driving the sleeve along with it, by the stop means coming into contact with a dowel arm. The dowel arms are preferably elastically movable on the dowel or elastically expandable and elastically returnable. The dowel arms are advantageously automatically return to their original position when the expansion section is moved away from the dowel arms.

[0017] This ensures a high level of reliability for the fastening device. The stop devices prevent the sleeve from rotating with the rotating screw. The stop devices only act circumferentially relative to the screw's longitudinal axis as a stop for rotation around the sleeve's longitudinal axis, but not in the direction of the sleeve's linear or axial movement toward and from the screw head.

[0018] Without the stop means according to the invention, the sleeve may rotate along with the rotating screw, which is caused by friction, in particular, by the meshing threads on the screw (i.e., the external thread of the screw) and the threads of the sleeve (i.e., an internal thread or a nut inserted into a sleeve base body). Without the rotation stop means, the rotation of the sleeve disadvantageously leads to the sleeve not moving axially toward the screw head or the head of the anchor. This would also prevent the anchor arms from spreading, as the expansion section would not be effective. The fastening function would therefore be impossible.

[0019] Conversely, if the dowel arms are already significantly or fully expanded, with the expanded section resting against the dowel arms and axially moved far toward the screw head, the sleeve could not be moved away from the screw head without the stop means, meaning the dowel arms could not return to the device's original position or to the position resting against the dowel due to the self-elastic behavior of the spring-loaded dowel arms. In this case, it would be impossible to remove the device and / or the toilet seat component from the toilet seat, or only with great effort and / or damage.

[0020] The sleeve preferably comprises an outer sleeve base body, for example made of plastic, with the expanded section on the outside and an internal thread matching the external thread of the screw. The internal thread can be implemented in the sleeve base body by a threaded section inserted therein, preferably formed from a standard screw nut, which can be removably inserted, e.g., axially, to fit and torque-proof to the base body.

[0021] The screw is preferably an M6 nut and the nut is an M6 nut.

[0022] The dowel arms are preferably elastically movable. In the initial position of the device, the dowel arms are positioned on the device or adjusted to a central dowel longitudinal axis. The fastening device has an external dimension below the dowel head section that is slightly smaller than the diameter of a standard hole in the toilet ceramic.

[0023] The expansion section of the sleeve allows the dowel arms to be aligned or adjusted outwards or at an angle to the longitudinal axis when the screw is turned.

[0024] This is achieved by means of the expansion section moving axially towards the screw head, preferably continuously outwards, in that the expansion section pushes the spring arms outwards by contacting the spring arms.

[0025] The direction of rotation is circumferentially related to a central longitudinal axis of the screw, which coincides with a central longitudinal axis of the device or the dowel.

[0026] The plurality of dowel arms, for example preferably two, three or four, are preferably identical to one another. The dowel arms are narrow and elongated in the longitudinal direction of the fastening device or the dowel. The dowel arms are each present on the preferably one-piece dowel as sections cut free from the rest of the dowel partially or on three sides. For this purpose, the dowel is slotted, for example, with two or more elongated, narrow, material-free slots in the longitudinal direction of the dowel or parallel to the length of the dowel arms. The preferably identical slots can at least almost correspond to the width or circumference of the dowel arms.

[0027] The dowel arms are preferably tooth-like in shape, having areas cut free at the sides and bottom, which are connected at the top to a remaining part of the dowel via a material bridge. Via the material bridge, for example a film hinge, each dowel arm is connected to a neck section of the dowel, which is located between a head section of the dowel and the dowel arms. The neck section has an axial extension length that is adapted to the toilet seat component. The dowel arms have a length between the neck section and a free lower end, wherein the respective dowel arm is designed to be solid over the entire length of the dowel arm or is made from a solid material, in particular without a recess, opening or slit.

[0028] The sleeve has a central through-hole that extends through the head section, neck section, and dowel arms for the screw to pass through. The through-hole has a section at the bottom with an insertion contour that allows for the precise, torque-resistant insertion of the nut.

[0029] The expansion section is flat, preferably designed as an inclined surface, preferably frustoconical, tapering towards the screw head or the dowel arms.

[0030] The limitation of the joint rotational movement of the screw and the sleeve with the attachment devices is, in particular, not absolute, but rather provided with a freewheel or a certain tolerance. For easy assembly of the fastening device, good function, and to avoid clamping between the dowel arms and the attachment devices, a preferably small relative rotation is provided, i.e., with the rotating sleeve until the attachment devices strike the dowel arms of the fixed dowel. The possible rotation is preferably in a range of less than 20 angular degrees in the rotational or circumferential direction of the sleeve.

[0031] One advantage arises from the fact that the stop means have a projection that is raised relative to an outer contour of the widened section. A projection can be designed simply and space-savingly, preferably on a sleeve formed integrally from a plastic or metal material. With two or more projections, two adjacent projections are spaced apart from each other by a portion of the widened section.

[0032] The projection is preferably relatively narrow around its circumference, for example, in a web-like or rib-like configuration. The width of the projection in the circumferential direction is, for example, 3-10 degrees or in the millimeter range. The projection is preferably formed integrally with the expansion section on the sleeve.

[0033] The projection is preferably formed as a web-shaped section on the expanded section, extending up to a cylindrical envelope surface of the sleeve and projecting radially toward the expanded section. Thus, the projection has opposing, at least approximately triangular, side surfaces that are separated from one another across the circumferential thickness of the projection.

[0034] It is also advantageous for the stop means to have several raised projections. This makes the anti-twist protection even more effective. Preferably, a projection is provided on each side of a dowel arm in the circumferential direction. The sleeve is limited in one direction of rotation by the impact of one projection on one side of the dowel arm, and in the other direction of rotation by the impact of the other projection on the other side of the dowel arm.

[0035] The projections divide the expansion section into several separate partial expansion sections. A dowel arm extends into each partial expansion section.

[0036] An advantageous modification of the invention is characterized in that the stop means have a plurality of projections circumferentially offset from one another in the circumferential direction of the sleeve.

[0037] Preferably, the projections are regularly distributed or regularly spaced from one another. Preferably, exactly two, preferably exactly three, and particularly preferably exactly four projections are provided, which are circumferentially offset or offset in the circumferential direction relative to the longitudinal axis of the sleeve. If four projections are provided, these are circumferentially offset from one another, for example, by approximately 90 degrees. Then, preferably, exactly four dowel arms are provided.

[0038] According to another advantageous embodiment, the stop means have two projections spaced apart from one another in the circumferential direction of the sleeve, between which a receiving region of the sleeve is formed, into which a dowel arm projects when the dowel arm and the expansion section overlap in the longitudinal direction of the device.

[0039] When projecting into the intermediate area between two adjacent projections, the dowel arm rests, for example, with an inner side against the expanded section, or the inner side of the dowel arm and the expanded section come into contact. The receiving area is recessed to form an outer envelope surface, which is formed in particular as a cylindrical sleeve envelope surface. Thus, in the initial state of the device, each dowel arm can be sunk into the receiving area, relative to a preferably cylindrical envelope surface of the device in the area below the collar of the dowel. A front end section or end longitudinal section of the respective dowel arm accordingly enters the receiving area. When the sleeve is moved towards the screw head, in the clamped state of the fastening device, the outer contour of each expanded or spread dowel arm projects radially outwards towards an outer side of the sleeve or projection, out of the envelope surface.This allows a clamping effect to be achieved with each dowel arm spread out to the same extent.

[0040] At least one front free end section of each dowel arm acts as a clamping section projecting from an underside of the flat area or walls of the recess in the toilet ceramic.

[0041] Advantageously, there are exactly three or exactly four dowel arms, with each of the multiple dowel arms inserting into a corresponding receiving area of ​​the sleeve when the dowel arms and the expansion section are in contact with each other. The dowel arms are preferably formed symmetrically on the dowel with respect to its central longitudinal axis.

[0042] This means that a comparatively uniform and high clamping or anchoring force can be achieved with a simple design of the anchor.

[0043] According to a further advantageous embodiment of the invention, the dowel has a head section with a through-hole for the screw and a neck section adjoining the head section in the longitudinal direction of the dowel, wherein the neck section has an outer contour that differs from the cylindrical shape. This allows for a simple and secure anti-rotation lock of the fastening device or the dowel assembly on the toilet seat component. An anti-rotation lock serves to prevent rotation when the screw is turned from the outside while the fastening device is pushed through the toilet seat component and inserted into the prepared recess in the toilet seat.To ensure that the dowel does not rotate together with the screw and the sleeve relative to the toilet seat component, but rather the screw relative to the sleeve and the dowel, the neck section is located on a counter section, in particular of an elongated hole with straight, parallel, opposite walls of the toilet seat component, so that no twisting of the dowel in the elongated hole is possible.

[0044] An outer dimension of the neck section preferably has a smaller width than an elongated hole in the toilet seat component.

[0045] Advantageously, the neck section has a polygonal outer contour. The neck section is at least approximately square or rectangular in cross-section.

[0046] The neck portion preferably has a square-shaped outer contour with rounded edges between two adjacent flat outer sides.

[0047] It is also advantageous if the dowel arms are provided on the side of the neck section facing away from the head section, wherein a collar of the dowel is formed between the neck section and the dowel arms, said collar having an external dimension that is larger than an external dimension of the neck section. The dowel is thus designed such that the fastening device can be secured against being pulled out upwards in the longitudinal direction when inserted through the toilet seat component. The collar therefore has a larger external dimension than the elongated hole in the toilet seat component. The fastening device only needs to be threaded into the elongated hole, with the collar engaging underneath an underside of the toilet seat component. For this purpose, a larger push-through section, through which the fastening device or the collar can be pushed, is adjacent to the elongated hole in the toilet seat component. The device is then moved in the elongated hole.

[0048] The invention also relates to a toilet seat component for a toilet bowl with prepared recesses for fastening the toilet seat component to the toilet bowl, wherein the toilet seat component has two elongated holes which are designed to match the recesses of the toilet bowl, wherein each elongated hole has opposite elongated hole inner surfaces separated by a material-free region, which extend over an offset length of the elongated hole in the longitudinal direction of the elongated hole, wherein a first elongated hole inner surface is flat and a second elongated hole inner surface is flat, wherein the opposite elongated hole inner surfaces define planes aligned parallel to one another, wherein a through-hole region of the elongated hole adjoins the elongated hole inner surfaces, wherein a width dimension of the through-hole is greater than a width dimension in the region of the elongated hole inner surfaces.This advantageously design allows the toilet seat component to be attached to a toilet seat with two fastening elements. When the toilet seat component is correctly positioned on the toilet bowl, each fastening element engages through a slotted hole and a corresponding recess located below it in the toilet bowl.

[0049] Finally, the invention relates to an assembly unit comprising a toilet seat component for a toilet bowl as defined above and a device as described above. This allows for simple assembly and disassembly of a toilet seat component on a toilet bowl from above. This is easy to assemble, as there is no need to laboriously manipulate the toilet bowl from underneath.

[0050] Furthermore, the invention provides a highly stable and reliable attachment of the toilet seat component to the toilet bowl, which also provides sufficiently high clamping or fastening forces over the long term. Multiple use is also advantageously possible by unscrewing the screw of the fastening device, allowing the fastening device and toilet seat component to be removed from the toilet bowl, for example, for cleaning purposes or for replacement in the event of damage to the toilet seat component. The fastening device or the screw-dowel device can advantageously be used multiple times.

[0051] Preferably, the toilet seat component can be fastened to each of the two recesses in the toilet bowl via both elongated holes, each with a fastening device according to the invention, which represents an advantageous two-point fastening. On the one hand, the fastening device, which is designed to match the elongated hole, can be inserted into the toilet seat component from above in its initial position with the dowel arms in place in the area of ​​the push-through area and then moved towards the inner surfaces of the elongated hole. In the inserted position, a partial length of the fastening device protrudes from the bottom of the toilet seat component, comprising a concealed external thread section of the screw, the attached dowel arms, and the sleeve. As soon as the protruding partial lengths of the two fastening devices penetrate into the recesses in the toilet seat component from above, the toilet seat component is placed on top of the toilet bowl or the flat area.The toilet seat component is then secured to the toilet bowl by tightening the two screws on the fastening devices. The dowel arms, which are then spread open with the sleeve, form a secure clamp connection, for example, below the two recesses in the flat area of ​​the toilet bowl. The entire assembly and subsequent disassembly can be conveniently carried out from above using a top-mounted system.

[0052] The width or diameter of the preferably cylindrical through-hole is larger than the width of the inner surface of the slot. The width or width dimension is assumed to be a measurement perpendicular to the longitudinal extent of the slot.

[0053] The toilet seat component, for example, is an elongated, narrow component with attachment elements for the detachable attachment of additional elements such as a toilet seat riser for a toilet bowl and / or a toilet lid.

[0054] The preferably exactly two elongated holes preferably have an aligned longitudinal extension. The distance between the two elongated holes and their length covers a distance between the two recesses in the toilet bowl.

[0055] According to another advantage, the outer contour of the neck section of the dowel is matched to the opposite inner surfaces of the elongated hole in such a way that when the device is inserted at a point within the offset length of the elongated hole, the outer contour of the neck section comes into contact with the opposite inner surfaces of the elongated hole in such a way that the dowel is secured in the elongated hole against twisting about its longitudinal axis.

[0056] Secure installation and fixing also requires the dowel to be secured against rotation in the elongated hole of the toilet seat component. The dowel is preferably secured in the elongated hole in two directions by positive locking. The elongated hole has a constant width or hole width across the offset length of the elongated hole. The width across the offset length of the elongated hole is only slightly larger than the outer dimension of the neck section or its corresponding opposite outer sides. The resulting gap is, for example, in the tenths of a millimeter range. This allows for the dowel or fixture to be moved with some play in the longitudinal direction of the elongated hole, ensuring precise alignment of the fixture with the respective recess in the toilet bowl.

[0057] The preferably corresponding, flat, parallel outer sides rest against the slotted hole walls with minimal play. This prevents the dowel from being carried along by the screw or sleeve when the screw is tightened, nor from rotating with the screw, nor from twisting in or relative to the slotted hole, as the flat, touching surfaces at the slotted hole and the neck section block each other, making any rotational movement of the dowel in the slotted hole impossible.

[0058] Finally, it is advantageous if the height of the neck section is aligned with the height of the slotted hole. This provides a pull-out or lift-off protection against the fastening device being lifted beyond the offset length of the slotted hole. Inserting and removing the fastening device is only possible in the insertion section.

[0059] The anchor's lift-off protection across the offset length of the elongated hole is preferably achieved by positive locking. A height between the underside of the head section of the anchor and an upper edge of the collar of the anchor corresponds at least approximately to the height of the elongated hole across the offset length of the elongated hole. The elongated hole preferably has a chamfer along its upper edge on the toilet seat component, with a transition between the underside of the head of the anchor and the neck section aligned with the chamfer. This enables sliding guidance for the anchor and facilitates precise engagement of the fastening device via appropriately coordinated guide surfaces on the anchor and the elongated hole. Character list

[0060] Further features and advantages of the invention are explained in more detail with reference to the exemplary embodiments schematically illustrated in the figures. In detail: Fig. 1 a perspective view of the fastening device according to the invention obliquely from above, Fig. 2 the fastening device according to Fig. 1 in longitudinal section, Fig. 3 the fastening device according to Fig. 1 when approaching a perspective section of a toilet seat component according to the invention in the area of ​​a slot, Fig. 4 an excerpt of the arrangement according to Fig. 3 in a step according to Fig. 3 following inserted state of the fastening device in the insertion section of the slot, Fig. 5 the section according to Fig. 4 with the fastening device to a position within a displacement length of the slot, Fig. 6 a perspective view obliquely from above of the toilet seat component according to the invention according to the Fig. 3 to Fig. 5 with two fastening devices engaging through respective slots according to Fig. 1, Fig. 7 a sectional view along the section line A - A in Fig. 6, Fig. 8 an upper section of a section according to the section line B - B in Fig. 6, Fig. 9 the order pursuant to Fig. 6 when approaching from above a toilet bowl with prepared recesses in perspective view, Fig. 10 the order pursuant to Fig. 6 when mounted on top of the toilet bowl in the view according to Fig. 9, Fig. 11 a partial section of Fig. 10 in a rear view with indicated rotation of a screw of the fastening device to achieve a clamping state and Fig. 12 the view according to Fig. 11 in an indicated release state of the fastening device.

[0061] Fig. 1 and Fig. 2 show a device 1 according to the invention for fastening a toilet seat component 2 to a toilet bowl 3 with prepared recesses 4, 5 for fastening the toilet seat component 2. The device 1 is also referred to below as fastening device 1.

[0062] The fastening device 1 is designed as a screw-dowel fastening element. The fastening device 1 comprises a screw 6, preferably an M6 or M8 screw, with a screw head 7 and with an external or screw thread 8. The screw 6 extends through a dowel 9 with a head 10 such as a flat head, a neck section 11, a collar 12, and four dowel arms 13-16. Furthermore, the fastening device 1 has a sleeve 17 received via the screw thread 8. The screw 6 passes centrally through the dowel 9 and the sleeve 17. Upon an externally induced rotational movement of the screw 6 relative to the sleeve 17 in the direction of rotation R1, R2, the sleeve 17 is displaceable in the axial direction along the screw 6 in the direction A1, A2. The sleeve 17, provided with a central passage 18, has an upper widening section 19 and a cylindrical base 20.

[0063] The sleeve 17 has a sleeve base body 17a and a nut 32 inserted therein with an internal thread matching the external thread 8.

[0064] The expansion section 19 and the four movable dowel arms 13-16, each connected to the collar 12 via a film joint 21, can be brought into contact with each other, so that depending on the degree of displacement of the sleeve 17 in the direction A1 towards the screw head 7, the dowel arms 13-16 can be adjusted to different extents outwards according to S1 from an initial position of the device 1 applied to the dowel 9 by the rotational movement of the screw 6 in a first rotational direction R1 of the screw 6, which in Fig. 11, which shows the initial position of the device 1 with the dowel arms 13-16 in place. The contour of the dowel arms 13, 14, which are elastically spread outwards or radially moved outwards in the same way, with the sleeve 17 displaced upwards in the direction A1, is shown in Fig. 11 is indicated schematically by dashed lines.

[0065] Thus, the toilet seat component 2 is fixed to the toilet bowl 3 or a flat area 3a of the toilet bowl 3 by the spread dowel arms 13-16 and is immovably fixed relative to the toilet bowl 3.

[0066] The dowel arms 13-16 are made of the Fig. 11 indicated spread position can be reset against direction S1, for example for the disassembly of the toilet seat component 2 from the toilet bowl 3. For this purpose, the dowel arms 13-16 are adjusted inwards, by an axial displacement of the sleeve 17 in direction A2 away from the screw head 7 by a rotational movement of the screw 6 in a second rotational direction R2 of the screw 6, which Fig. 12. When the sleeve 17 is moved downward in the direction of A2, the front ends of the dowel arms 13-16 may still be in contact with the sleeve 17 and thus be slightly tensioned outwards. In order to relieve the remaining slight tension of the dowel arms 13-16 and then be able to completely remove the toilet seat component 2 from the toilet bowl 3, the screw 6 screwed in the direction of R2, which then protrudes above the head 10 of the dowel 9, is pressed downward in the direction of A3, whereby the sleeve 17 is also moved further downward in the direction of A2. The sleeve 17 is pressed downward and out of the dowel 9. The widened section 19 is thereby completely out of contact with the dowel arms 13-16, whereby these automatically elastically return to the maximum radially inward position on the dowel 9. The two fastening devices 1, together with the toilet seat component 2, which are thus relaxed, can be lifted upwards from the toilet bowl 3.The dowel arms 13-16 can be pulled upwards out of the recesses 4, 5 of the toilet bowl without or almost without frictional contact with the inner walls of the recesses 4, 5.

[0067] The sleeve 17 has stop means 28 which are matched to each dowel arm 13-16 and which, when the screw 6 rotates relative to the dowel 9, prevent or limit a joint rotational movement of the screw 6 and the sleeve 17 due to the sleeve 17 being carried along by the screw 6, in that the stop means 28 come into contact with the dowel arms 13-16.

[0068] The stop means 28 are designed as four web-like ribs 29, which are circumferentially offset by approximately 90 degrees relative to the longitudinal axis L of the fastening device 1 on the widening section 19. A receiving area is formed between each two adjacent ribs 29, so that each of the four dowel arms 13-16 extends into a receiving area delimited by two adjacent ribs 29.

[0069] For the assembly of the toilet seat component 2, a fastening device 1 is inserted from above into two slots 22, 23 of the toilet seat component 2, which are designed to match the recesses 4, 5 of the toilet bowl 3, which can be determined by means of the Fig. 3 to Fig. 5 is explained for the slot 22. The slot 23 is designed accordingly to the slot 22.

[0070] The slot 22 has an offset length L1 of the slot 22 (see Fig. 7) has opposing elongated hole inner surfaces 24, 25 separated by a material-free area, which extend in the longitudinal direction of the elongated hole 22, wherein both elongated hole inner surfaces 24, 25 are flat and parallel to one another.

[0071] In addition, the elongated hole 22 has a through-hole area 26, wherein a width dimension or diameter of the through-hole area 26 is larger than a width dimension or diameter in the area of ​​the inner surfaces of the elongated hole over the offset length L1. The width dimension of the through-hole area 26 is slightly larger than a diameter dimension of the fastening device 1 over the length of the dowel 9 and the sleeve 17 in the starting position. Accordingly, the fastening device 1 is inserted with its lower end or the end closest to the sleeve first in its starting position from above in the insertion direction M1 (see Fig. 3) inserted into the through-hole area 26 and then moved in the direction of the opposite elongated hole inner surfaces 24, 25 or the offset length according to the displacement direction M2 until the fastening device 1 is positioned in the elongated hole 22, e.g. according to Fig. 5.

[0072] The elongated hole 22, 23 preferably has a bevel or chamfer 30 along its upper edge on the toilet seat component 2, wherein an oblique transition 31 on the outside of the dowel 9 between the underside of the head 10 and the neck section 11 is matched to the chamfer 30.

[0073] The neck section 11 is polygonal, such as triangular, square, or pentagonal in cross-section, here by way of example or essentially preferably square in cross-section with rounded edges between the four flat outer surfaces 11a of the neck section 11. Of the four outer surfaces 11a, two opposite ones are thus aligned parallel to each other and offset at right angles to the two adjacent outer surfaces. To prevent the dowel 9 from rotating in the slotted hole 22, two opposite outer surfaces 11a each bear against one of the slotted hole inner surfaces 24, 25 with slight play, which Fig. 8. The collar 12 has a slightly smaller outer dimension than the width of the through-hole area 26 and a slightly larger outer dimension than the distance between the elongated hole inner surfaces 24 and 25, so that the collar 12 encompasses the opposite lower edges 24a and 25a of the elongated hole inner surfaces 24, 25 (see Fig. 8). In this way, the fastening device 1 is prevented from being lifted upwards or pulled out of the elongated hole 22 beyond the offset length L1, whereby the fastening device 1 is secured to the toilet seat component 2.

[0074] According to the described arrangement of the fastening arrangement 1 in the slot 22, an identical fastening device 1 is positioned in the slot 23, whereby the situation according to Fig. 6 is reached. The two fastening devices 1 in the elongated holes 22, 23 are adjusted to the distance between the two recesses 4, 5 in the toilet bowl. Then, the toilet seat component 2 with the two fastening devices 1 is placed from above onto the flat area 3a (see Fig. 9). The two longitudinal sections of the fastening devices 1 projecting at the bottom of the toilet seat component 2 each engage in the mounting direction M3 into a corresponding one of the two recesses 4 and 5, respectively. A flat underside of the toilet seat component 2 rests on the flat area 3a on the top side (see Fig. 10).

[0075] Starting from the attached toilet seat component 2 on the toilet bowl 3, the respective screw 6 of the two fastening devices 1 is then loosened from the outside using a suitable tool or screwdriver according to Fig.11 is rotated in the direction of rotation R1 and the dowel arms 13-16 are spread outwards so that the toilet seat component 2 is permanently fixed to the toilet bowl 3 both laterally and upwards.

[0076] On the toilet seat component 2, which is designed here by way of example or preferably as a bridge, an attachment member 27 is provided at each of the two opposite longitudinal ends for the detachable attachment of add-on parts or further elements such as parts, for example a toilet seat elevation for the toilet bowl 3 and / or for a toilet lid. List of reference symbols 1 device 2 Toilet seat component 3 toilet bowls 3a Flat area 4.5 recess 6 screw 7 screw head 8 screw threads 9 dowels 10 heads 11 Neck section 11a Outer surface 12 collars 13-16 dowel arm 17 sleeve 17a Sleeve base body 18 passage 19 Widening section 20 sockets 21 film joint 22, 23 slotted hole 24 Slotted hole inner surface 24a edge 25 Slotted hole inner surface 25a edge 26 Through-hole area 27 Attachment device 28 lifting gear 29 rib 30 Chamfering 31 Transition 32 mother

Claims

[1] Fastening device (1) for fastening a toilet seat component (2) to a toilet bowl (3) with prepared recesses (4, 5) for fastening the toilet seat component (2), wherein the fastening device (1) comprises a screw (6) with a screw head (7) and with a screw thread (8), a dowel (9) with a neck portion (11), and a sleeve (17) received via the screw thread (8), wherein the screw (6) passes through the dowel (9) and the sleeve (17) so that, upon an externally induced rotational movement of the screw (6) relative to the sleeve (17), the sleeve (17) can be displaced in the axial direction along the screw (6), wherein the sleeve (17) has an expanded portion (19), wherein the expanded portion (19) and a plurality of movably designed dowel arms (13-16) of the dowel (9) can be brought into mutual contact,so that, depending on the extent of displacement of the sleeve (17) in the direction of the screw head (7) by the rotational movement of the screw (6) in a first direction of rotation of the screw (6), the dowel arms (13-16) can be adjusted outwards to different extents from an initial position of the fastening device (1) applied to the dowel (9), and the dowel arms (13-16) can be adjusted inwards by a displacement of the sleeve (17) in the direction away from the screw head (7) by a rotational movement of the screw (6) in a second direction of rotation of the screw (6), characterized by that the sleeve (17) has stop means (28) which are adapted to a dowel arm (13-16) and which, when the screw (6) rotates relative to the dowel (9), prevent or limit a joint rotational movement of the screw (6) and the sleeve (17) due to the sleeve (17) being carried along by the screw (6), in that the stop means (28) come into contact with a dowel arm (13-16), wherein the elongated, slender dowel has a widened or enlarged flat head at the top, which is, for example, flange-like, to the remaining part of the dowel adjoining it on one side or downwards with a neck section and dowel arms, wherein the sleeve comprises an outer sleeve base body made of plastic, with the expansion section on the outside, with an internal thread matching the external thread of the screw, wherein the dowel has a head section and the dowel arms are present on the side of the neck section facing away from the head section, wherein a collar of the dowel is formed between the neck section and the dowel arms, which collar has an external dimension that is larger than an external dimension of the neck section, so that the dowel is designed such that the fastening device can be secured against being pulled out upwards in the longitudinal direction when inserted into the toilet seat component. [2] Fastening device according to claim 1, wherein the head of the dowel is designed to sit with its underside on the edge around the respective opening in the toilet seat component. [3] Fastening device according to one of the preceding claims, wherein the fastening device is multi-part and has three further parts in addition to the screw, and can be disassembled or disassembled into its individual parts, wherein the dowel and at least one base body of the sleeve are made of a plastic. [4] Fastening device according to one of the preceding claims, wherein the fastening device is an elongated screw-dowel device with which a clamping connection can be established, wherein with the dowel arms widening by screw rotation, with the toilet seat component attached to the toilet seat and inserted fastening device which extends through the toilet seat component and the prepared recess in the toilet seat, the toilet seat component penetrated by the fastening device is fastened to the toilet seat. [5] Fastening device according to one of the preceding claims, wherein the dowel arms are provided on the dowel in an elastically resilient manner and are elastically resiliently expandable and elastically resiliently returnable, wherein the dowel arms are automatically returnable to the starting position when the expansion section is moved away from the dowel arms. [6] Fastening device according to one of the preceding claims, wherein the dowel arms are narrow and elongated in the longitudinal direction of the fastening device or of the dowel, wherein the dowel arms are each present on the dowel as sections partially cut free from the rest of the dowel, wherein the dowel is slotted for this purpose with two or more elongated narrow material-free slots in the longitudinal direction of the dowel or parallel to the length of the dowel arms. [7] Fastening device according to one of the preceding claims, wherein the sleeve has a central through-opening extending through the head portion, neck portion and dowel arms for the screw to pass through. [8] Fastening device according to one of the preceding claims, wherein the through-opening has a section with an insertion contour at the bottom, which serves for the precise, rotationally fixed insertion of the nut. [9] Fastening device according to one of the preceding claims, wherein the widening section is flat, preferably designed as an inclined surface, preferably frustoconical, tapering towards the screw head or towards the dowel arms. [10] Fastening device (1) according to one of the preceding claims, characterized by that the stop means (28) have a projection (29) which is raised relative to an outer contour of the widening section (19). [11] Fastening device according to one of the preceding claims, characterized by that the stop means (28) have a plurality of raised projections (29). [12] Fastening device according to one of the preceding claims, characterized by that the stop means (28) have a plurality of projections (29) which are circumferentially offset from one another in the circumferential direction of the sleeve (17). [13] Fastening device according to one of the preceding claims, characterized bythat the stop means (28) have two projections (29) which are spaced apart from one another in the circumferential direction of the sleeve (17), between which a receiving region of the sleeve (17) is formed, into which a dowel arm (13-16) projects when the dowel arm (13-16) and the widening section (19) overlap in the longitudinal direction of the device (1). [14] Fastening device according to one of the preceding claims, characterized by that exactly four dowel arms (13-16) are present, wherein each of the plurality of dowel arms (13-16) dips into an associated receiving area of ​​the sleeve (17) when the dowel arms (13-16) and the expansion section (19) are in contact with one another. [15] Fastening device according to one of the preceding claims, characterized bythat the dowel arms (13-16) are present on the side of the neck section (11) facing away from the head (10), wherein a collar (12) of the dowel (9) is formed between the neck section (11) and the dowel arms (13-16), which collar has an external dimension that is larger than an external dimension of the neck section (11). [16] System, comprising - two fastening devices according to one of the preceding claims and - a toilet seat component, wherein exactly two openings are formed in the toilet seat component for exactly two fastening devices, wherein the elongated, slim dowel has a widened or enlarged flat head on top, which is for example flange-like, to the remaining part of the dowel adjoining it on one side or downwards, with a neck section and dowel arms, wherein the head has an enlarged external dimension compared to an elongated hole serving as an opening in the toilet seat component, into which the fastening device is inserted from above for fastening the toilet seat component to the toilet seat. [17] System according to the preceding claim, wherein an outer dimension of the neck portion has a smaller width dimension than an elongated hole in the toilet seat component. [18] Toilet seat riser, in particular for elderly and disabled people, comprising a toilet seat component and a fastening device according to any one of claims 1-15, and / or comprising a system according to any one of claims 16-17. [19] Toilet seat riser according to the preceding claim, wherein the toilet seat component is a bridge of the toilet seat riser. [20] Toilet seat elevation according to any one of claims 18-19, wherein the toilet seat component is an elongated narrow component with attachment members for releasably attaching the toilet seat elevation to a toilet bowl. [21] Toilet seat elevation according to one of claims 18-20, wherein the toilet seat component has exactly two elongated holes which have an aligned longitudinal extension, wherein in particular the distance between the two elongated holes and their length covers a distance between the two recesses in the toilet bowl. [22] Toilet seat riser according to one of claims 18-21, wherein for secure mounting or fixing, an anti-twist device of the dowel is provided in the elongated hole of the toilet seat component, wherein the securing of the dowel in the elongated hole is effected in two directions by positive locking. [23] Toilet seat riser according to one of claims 18-22, wherein the height of the neck portion is matched to a height of the elongated hole.

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