JP6516834B2 - Fixing device for fixing sanitary ware - Google Patents

Description

  The invention relates to a fastening device for fastening a sanitary device made of ceramic, comprising the features according to the preamble of claim 1.

  European Patent Application No. EP 13 387 11 1 discloses a fixing device which can fix ceramic sanitaryware, in particular a toilet bowl, to a wall. In this case, two threaded rods, which are usually arranged in the region of the water supply and drainage of the toilet, are the starting point. One adapter element is screwed on the threaded rod before the sanitary device is placed on it. The adapter element is rod-shaped and has an internal thread for the threaded rod. The adapter element further has a lateral recess. The base is pre-assembled to the sanitary device. The substrate has a receiving passage for the adapter element. In this receiving passage, the adapter element is inserted or the hygiene implement together with the base is placed on the preassembled adapter element. In order to positionally fix the adapter element in the basic body, a screw (hexagonal socket set screw) is arranged in a threaded bore in the basic body, which extends transversely to the receiving passage. The distal end of this potato screw engages in the lateral recess of the adapter element by screwing it in deeply. Since both the tip and the recess are beveled, tightening the screw leads to the retraction of the adapter element into the base. In this case, the substrate is supported on the inner wall of the hygiene appliance and presses the hygiene appliance against the wall.

  The object of the present invention is to make the assembly of such a fixing device simpler and more reliable.

  This object is achieved according to the invention by the features of claim 1. The fixing device according to the present invention serves to fix a sanitary ware made of ceramic such as a washbasin, a toilet bowl, a urinal, and a bidet. The fastening device preferably has an integral base, in particular of plastic. The substrate has a receiving passage extending along the longitudinal axis. The receiving passage is advantageously closed laterally but may have lateral openings. In the receiving channel, an adapter element can be introduced in the direction of introduction, which is in particular rod-shaped and can be screwed onto the threaded rod by means of a threaded hole. In this way, the adapter element can be screwed onto the threaded rod projecting from the wall in the frame of the preassembly. The fastening device further comprises a holding element. The retaining element serves for the form-locking retention of the adapter element in the receiving channel, and is arranged for this purpose in particular so as to be movable transversely to the longitudinal axis of the receiving channel. By "lateral" is meant in this case, in particular, substantially perpendicular to the longitudinal axis, but also including an arrangement which is oblique to the longitudinal axis. The retaining element is in particular a screw, which is in particular formed as a screw (hexagon socket set screw). The fixing device comprises in particular position fixing means. By means of this position fixing means it is possible to fix the substrate in the framework of the preassembly in the form of an undercut element, for example in the form of an undercut element, a clamping element or an adhesive device. However, the fixing device may not have such a fixing means without departing from the spirit of the invention, for example when the sanitary device is held in place manually by hand when it is placed over the adapter element. The fastening device forms a fastening assembly together with the sanitary device to be fastened and the threaded rod.

  The fixation device according to the invention is characterized by an engagement element. The engagement element is disposed on the base and automatically engages the undercut element of the adapter element upon introduction of the adapter element. In this way it is achieved that a connection is automatically formed between the substrate and the adapter element when the sanitary device to be fixed is put on. By “covering the hygiene appliance” is meant in this case that the hygiene appliance is guided together with the base relative to the adapter element, in which case the adapter element is introduced into the receiving passage of the base. By means of the engagement element, the hygiene implement is fixed in position in the adapter element against a movement directed opposite to the direction of introduction. In other words, unintentional release and removal of the sanitary ware in the assembly stage is prevented, which makes the assembly more secure. The fixed position of the sanitary device facilitates, in particular, the subsequent movement of the holding element. This movement is necessary in order to hold the retaining element in a form-locking manner to the adapter element. In other words, the sanitary device can be released after being covered. The assembly operator can use both hands to move the holding element, that is to say if the screw is used as a holding element, to screw this screw in place. Assembly is thereby facilitated.

  Advantageously, the engagement element or the undercut element is such that it can be led out of the outlet passage of the adapter element and introduced again into the receiving passage without the engagement element engaging the undercut element. It can be moved to the open position. That is, it is desirable that the engagement function be releasable. In this case, "movable", even though reversible, is irreversible as long as the engaging element is no longer removable from the substrate or the undercutting element is no longer removable from the adapter element. It means that you may. However, advantageously, each element is reversibly removable or remains on the substrate or adapter element. Due to the moveability to the open position, the fixing device can be removed again in a simple manner if necessary. To this end, the holding element is first moved so as to no longer hold the adapter element. The movement of the engaging or undercutting element into the open position allows the adapter element to be moved in the receiving passage in a direction opposite to the introduction direction. In this case, the engagement elements do not hold back. Thus, the substrate with the hygiene implement can be released from the adapter element.

  Advantageously, the engagement element is operatively connected to the holding element such that the movement of the holding element away from the receiving channel causes the movement of the engagement element to the open position. The engagement element and the holding element are in particular mechanically connected. In particular, the engagement element and the holding element have parallel movement axes. Advantageously, the engagement element is loaded by the spring element in the direction towards the receiving passage and has a stop surface. When the holding element is moved away from the receiving passage, the holding element is pressed against the stop surface.

  In an alternative and advantageous aspect of the invention, the engagement element may be disengaged from the undercut element by applying a defined force in the lead-in direction to the substrate. At the time of the new introduction of the adapter element into the receiving channel, the engagement element engages again the undercut element.

  Advantageously, the engagement element is supported movably, in or against the base transverse to the longitudinal axis (L). Here, "lateral" means, in particular, substantially perpendicular to the longitudinal axis, but also includes an arrangement that is oblique to the longitudinal axis. The movement may be performed, for example, linearly or as a rotation. Without departing from the subject matter of the invention, the engagement element may be arranged immovably on the base body and for this purpose the undercut element may be arranged movably in the adapter element.

  The embodiments described below may have the above-mentioned mobility to the open position as well as the above-mentioned disengagement with a defined force.

  A particularly simple, compact and stable construction results from the engagement element being formed as a wire bending element. The wire bending member comprises in particular a holding section which engages in the undercut element and a support section which is supported in the base body.

  By means of the engaging elements formed on the spring tongues which are integrally connected to the base, a likewise simple construction results, in particular when the base is made of plastic.

  Advantageously, the undercut element is an annularly extending groove or ridge which is in particular processed into an integral adapter element. The undercut element can thus be produced very simply and rapidly as part of the turning production of the adapter element.

  Alternatively to an integral adapter element, an undercut element is connected to the shank of the adapter, in particular via a clip connection, so that the undercut element can be withdrawn from the shank. It is advantageous to specify that The undercut element may in particular be formed as an open, elastically deformable ring. By "clip connection" we mean here a connection that resiliently engages against forces but is releasable. The undercutting element being removable allows the undercutting element to be removed for the purpose of removing the locking device. After withdrawal, the adapter element can be moved in the opposite direction to the introduction direction, in which case it can not be held back by the engagement element. By means of the clip connection, the undercut element can subsequently be mounted again on the shank, so that the fastening device can be assembled and removed several times.

  Advantageously, the undercut element and / or the engagement element have an introduction bevel. The lead-in ramp extends obliquely with respect to the longitudinal axis with the adapter introduced in the receiving channel. This makes possible in a simple manner the automatic relative movement of the engagement element with respect to the undercut element, which does not require, for example, a laborious transmission. Corresponding to the expression "and / or", the introduction bevel may be provided on the undercut element and on the engagement element or on only one of the two elements.

  The undercut element and / or the engagement element are preferably led out, in particular when the engagement element is disengageable from the undercut element by applying a defined force opposite to the introduction direction to the base body. It has a slope. The outlet ramp extends obliquely with respect to the longitudinal axis when the adapter is introduced into the receiving channel. The lead-out ramp causes relative movement between the engagement element and the undercut element such that both elements are disengaged. By means of the lead-out slope, simple constructions can be achieved without additional components. If both an introduction slope and an extraction slope are provided, these slopes preferably have different angles to one another. In particular, the lead-out slope is steep relative to the longitudinal axis, as compared to the lead-in slope, so that a simple automatic engagement and good retention against unintentional disengagement can be achieved.

  Advantageously, the adapter element has a recess for locking the retaining element. This recess is not an undercut element. Although the recess may be an undercut element without departing from the spirit of the present invention, the function of final holding by the holding element and the temporary position fixing by the engaging element and the undercut element are: It can easily be formed if the undercut element is different from the recess.

  The invention will be described in the following with reference to three embodiments.

It is a longitudinal cross-sectional view of 1st Embodiment. It is a side view showing the undercut element of a 1st embodiment. It is a perspective exploded view showing a 2nd embodiment. It is sectional drawing in the IV-IV plane shown in FIG. 3 of 2nd Embodiment. It is the top view which looked at 3rd Embodiment from the top. It is sectional drawing in the VI-VI plane shown in FIG. 5 of 3rd Embodiment. It is sectional drawing in the VII-VII cut surface shown to FIG. 5 and FIG. 6 of 3rd Embodiment. It is a figure which shows the adapter element of 3rd Embodiment.

  The fixing device 1 illustrated in FIG. 1 serves to fix the hygiene appliance 2 to the wall 3. An adapter element 4, a base 5 and a screw 6 belong to the fixing device 1. A metric threaded rod 7 projects from the wall 3. An adapter element 4 is screwed onto this threaded rod 7. Together with the threaded rod 7, the fixing device 1 forms a fixing assembly 8. In this case, the hygiene implement 2 and / or the wall 3 may be part of the fixing assembly 8. The adapter element 4 has a shank 9. This shaft 9 is sufficiently rotationally symmetrical and rod-shaped. At the rear end facing the wall 3, the adapter element 4 has a threaded bore 10. By means of this threaded bore 10, the adapter element 4 is screwed onto the threaded rod 7 so that the rear end is held against the wall 3. “Backward” and “frontward” always refer to the direction of introduction E of the adapter element 4 into the base body 5 hereinafter. The introduction direction E is directed away from the wall 3 in the vertical direction. The forward end of the adapter element 4 has a trapezoidal leading end 11 and a radially directed conical recess 12 immediately behind the leading end 11 and is concave. The arrangement 12 extends from the outside of the side a little beyond the axis of rotation R of the adapter element 4. In the rear third of the shank 9 an undercut element 14 is arranged as part of the adapter element 4 in an annularly extending rectangular groove 13. The undercut element 14 is a ring 15 made of plastic, which forms a weir 40 in the adapter element 4 and is interrupted by the opening 16 in about one fifth of its circumference. A tensioning belt 17 is arranged on the side opposite to the opening 16. The tensioning belt 17 projects from the ring 15 in the radial direction. In the view of FIG. 1, the tensioning belt 17 projects perpendicularly to the plane of the drawing. Between the recess 12 and the undercut element 14, the adapter element 4 passes through the through hole 18 of the wall 19 of the hygiene appliance 2. The adapter element 4 is surrounded by the sleeve 20 of the base 5 before the through hole 18. The sleeve 20 has an internally threaded bore 21 which penetrates in the radial direction. The interior of the sleeve 20 defines a receiving passage 22. The receiving passage 22 extends along the longitudinal axis L of the base 5. In this case, the longitudinal axis L substantially coincides with the rotation axis R of the adapter element 4 in the illustrated state during assembly. In the internally threaded bore 21 a screw 6 is arranged as a retaining element 23 in the form of a screw (hexagonal socket set screw) 24. In this case, the tip 25 of the potato screw 24 is directed to the adapter element 4, and the hexagonal hole 26 located on the side opposite to the tip 25 is directed away from the receiving passage 22. Due to the rotation of the holding element 23 with the aid of the hexagonal hole 26, the holding element 23 can be displaced along the movement axis VH transversely to the longitudinal axis L. A plurality of tongue-like position fixing elements 27 project rearward from the sleeve 20. The fixing element 27 has an outwardly directed hook 28 at its end. The hooks 28 of the locking element 27 engage behind the wall 19 in the region of the through hole 18. The position fixing element 27 passes through the through hole 18 parallel to the adapter element 4. One of the position locking elements 27 is integrally formed with a spring tongue 29 which is integrally directed backwards, the spring tongue 29 having a locking hook 30 at its end. The spring tongues 29 form in the base body 5 an engagement element 31. The locking hook 30 has a lead-in bevel 32 facing the adapter element 4, which is inclined rearwards with respect to the longitudinal axis L.

  For the assembly of the fixing assembly 8, in the pre-assembly, the adapter element 4 is screwed onto the threaded rod 7 as shown. The base body 5 is further inserted from the front along with the position fixing element 27 through the through hole 18 of the hygiene implement 2 and thereby fixed in position in the hygiene implement 2. Thereafter, the hygiene implement 2 can be placed on the adapter element 4 together with the substrate 5. In this case, the adapter element 4 is introduced into the receiving passage 22. This takes place until the locking hook 30 with the introduction ramp 32 strikes the undercut element 14. The further introduction of the adapter element 4 causes the locking hook 30 to move resiliently outward, ie away from the rotational axis R of the adapter element 4 and transversely to the longitudinal axis L, and then under It engages behind the weir 40 which the cutting element 14 forms. This may be interpreted as the automatic engagement of the engagement element 31 to the undercut element 14. Thereby, the hygiene implement 2 is fixed in position against accidental withdrawal and removal from the adapter element 4. The assembly worker can use both hands in the next step to rotate the screw 24 and thereby engage the retaining element 23 with the recess 12. By tightening the screw 24 on the basis of the conical tip 25 of the potato screw 24 and the conical recess 12, the base body 5 against the adapter element 4 in the direction towards the wall 3 aft. Movement occurs. Thereby, the sleeve 20 moves the hygiene implement 2 toward the wall 3.

  If the fixing assembly 8 is removed again, the screw 24 is screwed off until the screw 24 no longer projects into the receiving passage 22. The hygiene device 2 is then again fixed in position against detachment by means of the engagement element 31 and the undercut element 14. For removal, the undercut element 14 can be pulled out of the adapter element 4 by means of a tension belt 17. Due to the opening 16, the undercutting element 14 forms a clip connection 33 with the adapter element 4. That is, the ring 15 is not broken but simply elastically deformed and can be positioned again in the square groove 13 for a new assembly. The withdrawal of the ring 15 can be interpreted as the movement of the undercut element 14 into the open position.

  The second embodiment illustrated in FIGS. 3 and 4 largely matches, so only the differences are mentioned here. The same components are denoted by the same reference numerals. Walls, threaded rods and retaining elements are not shown for the sake of clarity. The adapter element 4 'does not have a separate component as the undercut element 14', but has a V-shaped, annularly extending groove 34 '. The groove 34 ′ is disposed between the introduction tip 11 of the adapter element 4 ′ and the recess 12. The base 5 'does not have a position fixing element. For this purpose, the base body 5 'is penetrated by a U-shaped slit 35 in the front area. In this case, the side of the U extends along the dividing line with respect to the storage passage 22. A substantially U-shaped wire bending member 36 is disposed in the slit 35. The wire bending member 36 forms an engagement element 31 '. The sides of the U-shaped wire bending member 36 form a holding section 37. The two holding sections 37 are connected to one another via the support section 38. The holding section 37 extends in a secant direction with respect to the receiving passage 22 and projects into the receiving passage 22 before assembly, which narrows the receiving passage 22. These holding sections 37 are movable away from one another, transversely to the longitudinal axis L and perpendicularly to the movement axis VH of the holding element (not shown). In this case, the movement takes place elastically. During the introduction of the adapter element 4 'into the receiving passage 22, the introduction tip 11 of the adapter element 4' acts as an introduction bevel 32 '. Since the wire bending member 36 has a round cross section, a second introduction slope 41 corresponding to the introduction slope 32 'is formed. With the further introduction of the adapter element 4 ', the holding sections 37 of the engagement element 31' move laterally apart from one another relative to the longitudinal axis L, the engagement element 31 'finally being in the groove 34'. Engage in By tightening the potato screws (not shown), the final fixation is formed as in the first embodiment. Further relative movement takes place between the base 5 'and the adapter element 4' when pulling against the wall, so that in this case the holding section 37 of the engagement element 31 'is based on the V-shaped shape of the groove 34'. Move further away. If the fixing device 1 'is to be removed, the screws are again removed. At the time of withdrawal of the adapter element 4 'from the receiving passage 22, the engagement element 31' engages again in the groove 34 'and secures the hygiene implement 2 against falling. This position fixing can be overcome by pulling on the sanitary ware 2 or the base 5 'with a force F defined in the introducing direction E. In this case, the front face of the V-shaped groove 34 'forms a lead-out slope 39, which is directed radially based on the force F acting on the holding section 37 of the engagement element 31' in the lead-in direction E. Press outwards. Since the wire bending member 36 has a round cross section, the second lead-out slope 42 corresponding to the lead-out slope 39 is formed. The adapter element 4 'may be repeatedly guided in and out of the base 5' and in this case is automatically fixed by the engagement element 31 'each time.

  On the other hand, in the fixing device 1 ′ ′ illustrated in FIGS. 5 to 8, the base body 5 ′ ′ is provided with a locking element 27 with hooks 28 projecting from the sleeve 20 ′ ′. 5 '' has a structure similar to that of the first embodiment. On the other hand, the base 5 ′ ′ differs from the first embodiment by four guide holes 43 with a square cross section. These guide holes 43 extend in parallel to the internally threaded holes 21 and are arranged in front of and behind the internally threaded holes 21 as a pair. The guide bores 43 are penetrated by the engagement elements 31 ′ ′ with the corresponding cross section, which project into the receiving passage 22. In the receiving passage 22, the engagement element 31 " has an obliquely inclined rearwardly directed introduction bevel 32 " (see FIG. 7). The engagement element 31 ′ ′ is approximately twice as long as the guide hole 43 and projects beyond the base 5 ′ ′ on the side opposite to the receiving passage 22. The engagement elements 31 ′ ′ are connected to one another at their ends via a plate 44. In this case, the plate 44 is part of the engagement element 31 ′ ′. The plate 44 has a circular notch 45 at its center. Through this notch 45, the movement axis of the holding element 23 extends concentrically. The notch 45 is sized to allow screwing and unscrewing of the screw 24 with a hex key (not shown) corresponding to the hex hole 26. The spider screw 24 thus remains accessible through the notch 45. On the other hand, the notch 45 is so small that the rear end face 46 of the screw 24 situated on the side opposite the tip 25 rests radially outwardly on the plate 44 when screwing. The plate 44 thus forms in this area the stop surface 47 of the engagement element 31 ′ ′ for the holding element 23. The first bushing 48 is disposed on the plate 44. The first bushing 48 projects in the direction towards the receiving passage 22 and surrounds the holding element 23 with play and rests on the base body. In the opposite direction, a second bushing 49 is arranged at the axial extension of the first bushing 48. A tube 50 is clamped onto this second bushing 49, as illustrated in FIG. 7 (and not in FIG. 6). This tube 50 serves to guide a hexagonal wrench (not shown) relative to the holding element 23. As can be seen from FIGS. 5 and 6, a spring element 51 in the form of a belt-like arc-shaped tongue 52 projects laterally from the plate 44 in one piece. The spring elements 51 engage the ribs 54 from behind with the locking projections 53 respectively. The ribs 54 extend parallel to the longitudinal axis L and are arranged outside the base 5 ′ ′, as shown in FIG. 3 in the second embodiment. The arcuate shape causes the spring element 51 to exert a return force away from the receiving passage 22 when the engagement element 31 ′ ′ moves.

  The adapter element 4 '' is identical except for the adapter element 4 'of the second embodiment and the fact that the groove 34' 'has a vertical receiving surface 55 instead of the lead-out slope 39. .

  When the adapter element 4 '' is introduced into the receiving passage 22, the engagement element 31 '' is first elastically pushed away by the introduction tip 11 of the adapter element 4 '' and then as the undercut element 14 ''. Engages in groove 34 ''. By means of the two rear engagement elements 31 ', this ensures that the adapter element 4' 'is already in position against removal if it only slightly projects into the base 5' '. As soon as the front engagement element 31 "is reached, this engagement element 31" is also fixed in the position reached. Unlike the second embodiment, the base 5 ′ ′ can not be withdrawn again from the adapter element 4 ′ ′ by a defined force. The actual fixing, however, takes place here as well by tightening the screw 24 as the holding element 23.

  For removal of the locking device 1 ′ ′, the screw 24 is released and in this case it is rotated until the rear end face 46 is pressed against the stop face 47. As a result, the engagement element 31 ′ ′ moves out of the receiving passage 22 against the force of the spring element 51 so that the engagement element 31 ′ ′ is no longer engaged in the groove 34 ′ ′. The adapter element 4 ′ ′ can then be withdrawn from the receiving passage 22.

1,1 ', 1''fixing device 2 sanitary device 3 wall 4, 4', 4 '' adapter element 5, 5 ', 5''base 6 screw 7 threaded rod 8 fixing assembly 9 of adapter element 4 Shaft 10 Threaded hole of adapter element 4, 4 ', 4''11 Introductory tip of adapter element 4, 4', 4 '' 12 Recess of adapter element 4, 4 ', 4''13 Square Grooves 14, 14 ', 14''Undercut elements 15 Rings 16 Openings 17 Tension belts 18 Through holes 19 Walls 20, 20''Sleeves 21 Female threaded holes 22 Storage passages 23 Retaining elements 24 Threads 25 Threads 24 Tip portion 26 Hexagon hole 27 of the thumb screw 24 Position fixing element 28 Hook 29 Spring tongue 30 Locking hook 31, 31 ', 31''engaging element 32, 32', 32 '' Introduction slope 33 Clip joint 34 ', 34''Groove 35 Slit 36 Wire bending member 37 Holding section 38 Support division 39 Leading slope 40 鍔 41 Second introduction slope 42 Second derivation slope 43 Guide hole 44 Plate 45 Notch 46 A rear end face of the shoulder screw 24 A stopper face of the engaging element 31 ′ ′ 48 A first bush 49 a second bush 50 a tube 51 a spring element 52 a tongue 53 a locking projection 54 a rib 55 a receiving face E introduction direction F force L Longitudinal axis R Rotational axis of adapter element 4 Movement axis of holding element 23 VE Movement axis of engagement element 31 ''

Claims (12)

Fastening device (1, 1 ', 1'') for fastening a sanitary device (2) made of ceramic, comprising a substrate (5, 5) having a receiving passage (22) extending along a longitudinal axis (L) 5 ', 5'') and a particularly rod-like adapter element (4, 4', 4 '') with a threaded hole (10) for screwing on a threaded rod (7), The adapter element (4, 4 ', 4'') can be introduced into the receiving passage (22) in the introducing direction (E), and further, the adapter element (4, 4') may be introduced into the receiving passage (22). ', 4'') is provided with a retaining element (23), in particular a screw, for retaining the form-locking connection, said retaining element (23) being movable laterally, in particular with respect to the longitudinal axis (L) Of the fixing device (1, 1 ', 1'') arranged in the substrate (5) ,
Engaging elements (31, 31 ′, 31 ′ ′) are arranged on the base (5), and the engaging elements (31, 31 ′, 31 ′ ′) are the adapter elements (4, 4 ′). , 4 ′ ′), automatically engaging in the undercut element (14, 14 ′, 14 ′ ′) of the adapter element (4, 4 ′, 4 ′ ′), Fixing device (1, 1 ', 1'') for fixing the sanitary device (2) made of ceramic.   The engagement element (31 ′ ′) or the undercut element (14) does not engage the engagement element (31, 31 ′ ′) with the undercut element (14, 14 ′ ′). Movable to an open position so that the adapter element (4, 4 ′ ′) can be led out of the receiving channel (22) and introduced again into the receiving channel (22). The fastening device according to claim 1.   The engagement element (31 ′ ′) such that movement of the holding element (23) in a direction away from the receiving passage (22) results in movement of the engagement element (31 ′ ′) to the open position. 3. Fixation device according to claim 2, wherein) is operatively connected to the holding element (23).   The engagement element (31 ') can release the engagement with the undercut element (14') by applying a force (F) defined in the introduction direction (E) to the base (5 '). The fixing device according to claim 1, wherein the engaging element (31 ') is engaged again when the adapter element (4') is newly introduced into the receiving passage (22).   The engagement element (31 ′, 31 ′ ′) can be displaced laterally with respect to the longitudinal axis (L), in the substrate (5 ′, 5 ′ ′) or in the substrate (5 ′, 5 ′) 5. A fixation device according to any one of the preceding claims, which is supported against 5 '').   Fastening device according to any of the preceding claims, wherein the engagement element (31 ') is a wire bending member (36).   Fastening device according to any of the preceding claims, wherein the engagement element (31) is formed on a spring tongue (29) integrally connected to the base body (5).   Fastening device according to any of the preceding claims, wherein the undercut elements (14 ', 14 ") are grooves (34', 34") or wedges (40).   The undercut element (14) pulls the undercut element (14) from the stem (9), in particular via a clip connection (33) on the stem (9) of the adapter element (4). 9. A fixation device according to any one of the preceding claims, which is coupled so as to be able to be withdrawn.   The undercut element (14 ′, 14 ′ ′) and / or the engagement element (31, 31 ′, 31 ′ ′) have an introduction slope (32, 32 ′, 32 ′ ′, 41) The introduction slope (32, 32 ', 32' ', 41) is the longitudinal axis in a state where the adapter element (4, 4', 4 '') is introduced into the accommodation passage (22); 10. A fixation device according to any one of the preceding claims, which extends obliquely to (L).   The undercut element (14 ') and / or the engagement element (31') have a lead-out slope (39, 42), and the lead-out slope (39, 42) corresponds to the receiving passage (22) Fastening device according to any of the previous claims, wherein the adapter element (4 ′ ′) is introduced obliquely and extends obliquely with respect to the longitudinal axis (L).   The adapter element (4, 4 ', 4' ') is not the undercut element (14, 14', 14 ''), a recess (12) for engagement of the retaining element (23) 12. A fixation device according to any one of the preceding claims, comprising

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