EP0058391A1 - Fastening device at iron furniture or equipment parts which can be detachably joined to each other, and process for producing the same - Google Patents

Abstract

1. A fixing device on fitment or furnishing members which can be releasably connected together and which have mutually associated first and second portions, wherein each first portion (1, 27) has at least one receiving opening (2, 31) and the second portion either has at least one segment (3, 41) which can be inserted into the receiving opening or as a whole forms a segment which can be introduced into the receiving opening, wherein the fixing device comprises at least one resiliently outwardly projecting locking pin (4, 44) which is mounted displaceably in the segment (3) and at least one transverse bore (12, 34) which is formed in the first portion and which is disposed transversely with respect to the axis of the receiving opening (2, 31) and which extends from same to the outside surface of the first portion (1, 27) and into which the locking pin (4, 44) engages resiliently and releasably from the outside, when the segment (3, 41) is introduced into the receiving opening (2, 31), and wherein the transverse bore (12, 34) has an inner part (14, 35) adjoining the receiving opening (2, 31), of a cross-section corresponding at least to the outside cross-section of the locking pin (4, 44), and an outer part (15, 36) adjoining the inner part (14, 35) and the outside surface of the first portion (1, 27), of a cross-section which is considerably reduced in comparison with the inner part (14, 35), characterised in that the receiving opening (2, 31) and the inner part (14, 23, 35) of the transverse bore (12, 34) are provided in a filling portion (14, 23, 35) which is fitted into the first portion (1, 27) and fixed therein.

Description

The invention relates to a device of the type defined in the preamble of claim 1 and a method for producing the fittings or equipment parts intended for such devices and having the receiving opening.

Under the name "fittings or equipment parts" are in particular hardware parts such as handle or handle parts for doors or windows and sanitary equipment parts such as the holding arms of two-part towel holders, lower parts and cover caps of soap dishes, toothbrush holder, shelves or the like, but also the lower parts and upper parts of the Understand frame parts of letter boxes or the like. All these parts have in common that they each have a first part with a receiving opening and a second part, which either contains a segment that can be inserted into the receiving opening or from a segment that can be inserted as a whole into the receiving opening in the form of a wall or the like a lower part or the like, which is covered by a first part in the form of an upper part or the like or enclosed on all sides. The fastening device is designed in such a way that the locking pin engages in the transverse bore in the connected state of the two parts and, if necessary, holds the two parts together with a positive fit. Detachment of the two parts from one another is possible in that the locking pin is pressed out of the transverse bore by means of a tool inserted from the outside.

In the case of fastening devices of this type, it is often found to be disruptive that the connection of the two parts can be released with a large number of tools and, as a result, is insufficient against vandalism and theft _. is secured. It is therefore already known (DE-OS 28 06 417) to lock the locking pins with the help of special screws that can only be operated with a special tool. Such an anti-theft device is complex and costly.

The invention is therefore based on the object of providing a suitable anti-theft device for the fastening device described at the outset and also proposing a method for producing such an anti-theft device.

To achieve this object, the characterizing features of claims 1 and 26 are provided.

Further advantageous features of the invention emerge from the subclaims.

Since, in the fastening device according to the invention, the transverse bore which enables access to the locking pin has an outer section with a cross section which is substantially smaller than the large outer cross section of the locking pin itself, which is required for stable fastening, the two parts can only be made using a special tool, e.g. be separated from each other by means of a steel pin with a correspondingly small diameter and only by persons to whom the fastening mechanism and the position of the outer section of the transverse bore, which can often be concealed due to its small cross section, are known. Such an anti-theft device is not only sufficient for most applications, but is also extremely inexpensive to manufacture.

The production of the transverse bore using the method according to the invention on injection molded parts also has the advantage that no complex work steps and tools are required during the injection molding process. Normally, two core halves would have to be inserted into the receiving opening during the spraying process, one of which is the one Has inner section of the cross hole corresponding projection, un ^a. after the spraying process, one smooth core half and then the second core half having the projection would have to be pulled out of the receiving opening. For this purpose, corresponding guides in the core halves and / or for moving the molded parts would be required, which is not only technically complex, but also not feasible in the case of receiving openings with small cross sections, as are required, for example, on lever handle parts or push handles, due to tight tolerances and other problems is. When using the method according to the invention, however, the receiving opening only needs to be filled with a core corresponding to its shape during the spraying process, which considerably simplifies the spraying process.

So that the locking pin is not already pressed, e.g. By means of a hair or paper clip, can be pressed out of the cross hole, in a further development of the invention it is provided to brace the two fittings or fittings by at least one spring element in such a way that the locking pin with a clamp fit is arranged in the cross hole. This has the advantage that a sufficiently tight fit of the locking pin can be achieved even if the spring pressing the locking pin into the transverse bore has to be made relatively small in accordance with the usually very limited spatial conditions.

The invention is explained in more detail below in connection with the accompanying drawing using exemplary embodiments.

• Fig. 1 einen Schnitt durch eine erfindungsgemäße Befestigungsvorrichtung an zwei Türdrückerteilen in auseinander gezogener Darstellung;
• Fig. 2 einen Schnitt längs der Linie II-II der Fig. 1;
• Fig. 3 schematisch die Anordnung des in Fig. 1 dargestellten Füllstücks in einer Spritzform;
• Fig. 4 einen Schnitt durch eine Weiterbildung der Befestigungsvorrichtung nach Fig. 1;
• Fig. 5 einen Schnitt durch eine erfindungsgemäße Befestigungsvorrichtung an zwei Stoßgriffen für Türen.
• Fig. 6 eine erfindungsgemäße Befestigungsvorrichtung an den beiden Armen eines zweiteiligen Handtuchhalters;
• Fig. 7 und 3 Draufsichten auf das Unterteil und das Oberteil eines Rahmens für einen Briefeinwurf mit einer erfindungsgemäßen Befestigungsvorrichtung,
• Fig. 9 schematisch eine Draufsicht einer an einer Wand angebrachten Handtuchstange;
• Fig. 10 eine analoge Draufsicht eines an einer Wand angebrachten Zahnbecherhalters;
• Fig. 11 eine Seitenansicht der Gegenstände der Fig. 1 und 2;
• Fig. 12 in vergrößertem Maßstab eine teilweise geschnittene Draufsicht des linken Befestigungsstücks des in Fig. 9 gezeigten Beschlagteils;
• Fig. 13 eine Draufsicht des in Fig. 12 dargestellten Sockels;
• Fig. 14 eine Seitenansicht des in Fig. 13 gezeigten Sockels;
• Fig. 15 eine teilweise geschnittene Seitenansicht einer weiteren Ausführungsform des Sockels;
• Fig. 16 in vergrößertem Maßstab eine teilweise geschnittene Draufsicht des linken Befestigungsendstücks des Zahnbecherhalters nach Fig. 10;
• _Fig. 17 eine Draufsicht des in Fig. 16 dargestellten Sockels;
• _Fig. 18 eine Seitenansicht des Sockels nach Fig. 17 von links;
• Fig. 19 eine Seitenansicht des Sockels nach Fig. 17 von rechts;
• Fig. 20 eine vergrößerte, teilweise geschnittene Seiteansicht der Rastverbindung zwischen dem Sockel und dem Befestigungsendstück der Beschläge nach den Fig. 12 und 16;
• Fig. 21 einen Schnitt nach Linie XXI-XXI in Fig. 20;
• Fig. 22 eine Seitenansicht der in Fig. 20 und 21 dargestellten Buchse;
• Fig. 23 einen Axialschnitt eines weiteren Sockels gemäß der Erfindung; und
• Fig. 24 eine Draufsicht des Sockels nach Fig. 23.

Show it:

• 1 shows a section through a fastening device according to the invention on two lever handle parts in an exploded view.
• Fig. 2 is a section along the line II-II of Fig. 1;
• Fig. 3 shows schematically the arrangement of the filler shown in Figure 1 in an injection mold.
• 4 shows a section through a development of the fastening device according to FIG. 1;
• Fig. 5 shows a section through a fastening device according to the invention on two push handles for doors.
• 6 shows a fastening device according to the invention on the two arms of a two-part towel holder;
• 7 and 3 plan views of the lower part and the upper part of a frame for a letter slot with a fastening device according to the invention,
• 9 schematically shows a top view of a towel rail attached to a wall;
• 10 is an analog top view of a tooth cup holder attached to a wall;
• Figure 11 is a side view of the articles of Figures 1 and 2;
• FIG. 12 shows, on an enlarged scale, a partially sectioned top view of the left fastening piece of the fitting part shown in FIG. 9;
• Fig. 13 is a top view of the base shown in Fig. 12;
• Fig. 14 is a side view of the base shown in Fig. 13;
• 15 is a partially sectioned side view of a further embodiment of the base;
• 16 is a partially sectioned plan view on an enlarged scale of the left fastening end piece of the tooth cup holder according to FIG. 10;
• _F ig. Figure 17 is a top view of the base shown in Figure 16;
• _F ig. 18 shows a side view of the base according to FIG. 17 from the left;
• FIG. 19 shows a side view of the base according to FIG. 17 from the right;
• 20 is an enlarged, partially sectioned side view of the latching connection between the base and the fastening end piece of the fittings according to FIGS. 12 and 16;
• Fig. 21 is a section along line XXI-XXI in Fig. 20;
• Fig. 22 is a side view of the bushing shown in Figs. 20 and 21;
• 23 shows an axial section of a further base according to the invention; and
• 24 shows a top view of the base according to FIG. 23.

1 shows a fastening device according to the invention on a pair of door handles which has a first handle part 1 with a receiving opening 2 and a second handle part assigned to it, of which only one segment in the form of a handle mandrel 3 is shown in FIG. 1, which is connected in some way to the pusher part, not shown. The pusher mandrel 3 has a square cross section and can be inserted into the receiving opening 2 with a corresponding cross section with close tolerance. For releasable attachment of the presser mandrel 3 to the presser part 1, the latter has a locking pin 4 at its free end, which is slidably mounted in the presser mandrel 3 and with one end projects into an opening 5 of the presser mandrel 3, in which a compression spring 6 is also mounted, which tries to push the locking pin 4 outwards. The end of the locking pin 4, which protrudes into the opening 5, has a cross-sectional widening which is completely removed pulling the locking pin out of the arbor 3 prevents. The length of the opening 5 and the length of the part of the locking pin 4 projecting outwards from the surface of the presser mandrel 3 in the normal position according to FIG. 1 are dimensioned such that the locking pin 4 is pressed so far into the opening 5 against the pressure of the compression spring 6 can be that its outer end is flush with the surface of the press mandrel 3.

The handle part 1 has in its grip, the axis of which is substantially horizontal in FIG. 1, a steel insert 8, to which a sleeve-like filler 10 is welded along a weld seam 9, which sleeve encloses the receiving opening 2 or cup-like. At its end facing the weld 9, the filler 10 has a transverse bore 12 running perpendicular to its axis 11 and parallel to the axis of the handle, which has an inner section 14 bordering the receiving opening 2 with a cross section corresponding to the outer cross section of the locking pin 4 and one to the Has inner section and the outer surface of the pusher part 1 bordering outer section 15 with a significantly smaller cross section than the inner section 14.

When the two pusher parts are joined together, the pusher mandrel 3 is arranged with respect to the receiving opening 2 such that the locking pin 4 engages in the inner section 14 after the pusher mandrel 3 has been inserted, thereby connecting the two pusher parts to one another without play. A release of this connection is possible in that a steel pin with a small diameter is inserted from the outside into the outer section 15 of the transverse bore 12 and pressed in until the locking pin 4 has emerged from the inner section 14 and, as a result, the presser pin 3 from the Receiving opening 2 can be pulled out.

In plastic door handle pairs of the type described, the filler 10 and the steel insert 8 are encapsulated on all sides with a jacket 16 made of plastic. In order to manufacture the lever handle shown in FIG. 1 To simplify or enable le 1 and, above all, to avoid complex injection molds, the procedure according to the invention is as follows. The filler 10 is first produced and welded to the steel insert 8, if one is provided. A bore 17 running perpendicular to the axis 11 is formed in the filler piece, which completely penetrates the wall section of the filler piece 10 opposite the transverse bore 12 in FIG. 3, in the wall section of the filler piece 10 on the right, in FIG. 3, on the other hand forms only a blind bore, which is open in accordance with FIGS. 1 and 2 and leaves a wall section 21 of the filler 10. The filler 10 and the steel insert are now, as shown schematically in FIG. 3, placed in an injection mold 1R, and the free end of the receiving opening 2 is plugged onto a core 19 of a corresponding cross section, which holds the filler and at the same time the receiving opening 2 and covers the bore 17. Then the filler 10 and the steel insert 8 are encapsulated with liquid plastic, which penetrates into the mold cavity 20 of the mold 18 and consequently also from the outside into the bore 17. The inner section 14 of the transverse bore 12 remains free of plastic, since on the one hand the receiving opening 2 is filled and on the other hand the inner section 14 is closed at the rear end by the thin wall section 21.

After removal of the molded part, the outer section 15 of the transverse bore 12 is finally produced by drilling through the wall section of the jacket 16 obtained during the spraying and the wall section 21 from the outside.

Preferably, as shown in FIGS. 1 and 3, the transverse bore 12 / is not, as would be customary per se, on the lower side of the handle part 1 during assembly on the door, but in a central section near the inner arch. This has the advantage that the position of the transverse bore 12 is independent of whether it is a right-hand or left-hand lever part, which the La-. -. Maintenance considerably simplified and offers significant advantages, especially when it comes to combinations of pusher parts and buttons or differently colored pusher parts.

If, on the other hand, the transverse bore 12 is to be arranged on the underside of the pusher part 1, preference is given to FIG. 4, which shows a pusher part 22 in a position rotated by 90 ° compared to FIG. 1. Like the pusher part 1, the pusher part 22 has a receiving opening 2, a filling piece 10 and a plastic jacket 16. In contrast to FIGS. 1 and 3, however, the axis of an inner section 23 of the outer bore is arranged both perpendicular to the axis 11 of the receiving bore 2 and perpendicular to the axis 24 of a handle part of the handle part 22. In addition, a plug 26 which is made of metal or another material which does not connect to the plastic to be encapsulated is inserted into the bore 25 corresponding to the bore 17 according to FIG. 3, so that the bore 25 is not filled with plastic can be.

After completion of the spraying process, the outer section of the transverse bore can either be made from the right, as in FIG. 3, in which case the inner section 23 and the subsequently attached outer section form the transverse bore. Or the outer section is drilled from the left in FIG. 4 through the wall section opposite the bore 25 until the bore 25 is reached and the plug 26 can be knocked inward and removed through the bore thus created. In this case, the cross bore cooperating with the locking pin 4 consists of the bore 25 forming the inner section and the subsequently drilled outer section. The subsequent attachment of the outer section thus takes place in this embodiment depending on the type of door for which the handle part 22 is to be used.

The fastening device described can be used analogously to the connection of fitting parts in the form of push handles 27, 28 for a door 29, in particular a glass door (FIG. 5). The first push handle 27 has a sleeve-like or cup-like filler 30 with a receiving opening 31, which is surrounded by a sprayed-on plastic jacket 32 and an annular groove 33 at the end facing away from the door which prevents the jacket 32 from being removed from the filler 30. Analogously to FIG. 1, the push handle 27 is provided with a transverse bore 34 which has an inner section 35 with a comparatively large and an outer section 36 with a comparatively small inner cross section. The inner section 35 is formed in the wall of the filler 30 in the manner of a blind bore.

The second push handle 28 contains a sleeve or cup-shaped filler 37, which is surrounded by a sprayed-on plastic jacket 38 and has an annular groove 39 at the end facing away from the door 29, which prevents the jacket 38 from being pulled off the filler 37 . A fastening screw 40 is screwed into the filler 37 from the other side of the door, which has a threaded section arranged in the filler 37 and a thread-free section 41 which projects through the door 29 and a centering sleeve 42 inserted into its bore in the assembled state of the push handle 28 Hexagon head 43 carries and is extended beyond this. At the end of this section 41 facing away from the door 29, a locking pin 44 is mounted, which corresponds to the locking pin 4 according to FIG. 1 and, in the assembled state, engages in the inner section 35 of the transverse bore 34.

The assembly of the two push handles 27 and 28 begins with the push handle 28 being attached to the door 29 in the manner shown in FIG. 5. Then the fastening screw 40 is screwed on from the other side of the door until there is a tight fit of the pull handle 28 and the section 41 assumes such an angular position that when the receiving opening 31 is pushed on, the locking pin 44 can snap into the inner section 35 of the transverse bore 34. In order to enable such an angular position in any case, either the threaded section ^{4 is the} fastening screw 40 and / or the associated receiving part of the filler 37 and / or the centering sleeve 42 is sufficiently deformable and, for example, made of slightly resilient plastics. Finally, the receiving opening 31 is pushed onto the section 41 until the locking pin 44 engages, so that the two push handles 27 and 28 are firmly connected to one another, but by insertion a steel pin or the like in the outer portion 36 of the transverse bore 34 can be separated again.

Checking the correct angular position of section 41 includes possible in that the receiving opening 31 is widened at its outer end to a hexagon hole, which only fits when the section 41 is in the correct position on the hexagon head 43.

6, two pieces of equipment in the form of towel holder arms 46 and 47 are provided, which are detachably connected to one another. Analogously to FIG. 1, the first arm 46 has a receiving opening 4R which is surrounded by a filler 49 in the form of a hollow cylindrical sleeve which is fastened in a central bore 50 of one end of the arm 46 and a section which projects outwardly beyond this end which is rotatably arranged in a coaxial bore of a lower part 51. The lower part 51 is fastened to a wall or the like by means of screws 52 projecting through screw holes and covered with a cover cap 53 which has corresponding bores for receiving the filler 49. The end of the second arm 47 facing the first arm 46 has a central bore 54, into which a cylindrical mandrel 55 is inserted, which has a section which projects beyond the end of the arm 47 and which represents a segment which can be inserted rotatably into the receiving opening 48 its outer end carries a locking pin 56 corresponding to the locking pin 4 of FIG. 1. In the assembled state of the two arms 46 and 47, this locking pin 56 engages behind the rear edge of the filler 49 located in the arm 46 in a free space 57, which extends at this point by slightly beyond the rear edge te central bore 50 of the arm 46 is formed and represents an inner portion of a transverse bore arranged transversely to the axis of the receiving opening 48. So that the connection thus formed between the two arms 46 and 47 can be released again, the wall of the arm 46 opposite the locking pin 56 has a bore 58 with a small cross-section in comparison to the locking pin 56, which together with the free space 57 Cross-section must at least correspond to the cross-section of the locking pin 56, forms an outer bore which corresponds to the transverse bore 12 according to FIG. 1. In this embodiment, too, there is the advantage that the inner section of the outer bore can be produced with simple means and no complex measures are required when the arm 46 is injection molded. However, it is necessary that the two arms 46 and 47 assume such a position during disassembly that the locking pin 56 faces the bore 58.

So that the mandrel 55 can be pulled out of the lower part 51 after the first pushing in of the locking pin 56 without the locking pin 56 engaging in the screw hole 52 not covered by the filler 49, the lower part has a length of the locking pin 56 according to FIG. 6 adapted longitudinal groove 72.

7 and 8 show two pieces of equipment in the form of a lower part 59 and an upper part 60. The lower part 59 has a rectangular cross-section, a similar central opening 61 and screw holes 62 for fastening to a wall or door. The upper part 60 consists of a cap-like component which has a top wall 63 covering the bottom part 59 with a rectangular central opening 64 and a side wall 65 which runs all around at the outer edge of the top wall 63 and is arranged perpendicular thereto. The dimensions of the space bounded by the side wall correspond essentially to the outer dimensions of the lower part 59, so that the upper part 60 sits on the lower part largely without play. For fastening the two parts 59 and 60 to one another, the lower part has undercuts 66 on its upper edge in FIG. 7 on that cooperate with corresponding undercuts b7 on the side wall 65 of the upper part. On the other hand, according to FIG. 8, transverse bores 6A are formed in the form of elongated holes in the lower section of the side wall 65, to which locking pins 69 which are displaceably mounted and resiliently pushable in the manner of the locking pins 4 (FIG. 1) are assigned at corresponding locations on the lower part. 1 to 6, in the embodiment according to FIGS. 7 and 8, the entire lower part 59 can be inserted into the receiving opening of the upper part formed by the side wall 65. In the embodiment according to FIGS. 7 and 8, however, the locking pins 69 engage in the outer bores 68 after the upper part 60 has been placed on the lower part 59. In order to avoid that the locking pins 69 are accessible over the entire length and width of the elongated holes, the inner sections 70 of the elongated holes bordering the receiving opening are simultaneously formed as blind holes, while adjacent outer sections 71 of the elongated holes and extending to the outer surface of the side wall 65 have a much smaller cross-section than the inner sections 70, so that the outer bores 68, as in the previously described embodiments, consist of relatively large, the locking pins 69 receiving inner sections 70 and relatively small, hidden attachable and accessible only with a special tool outer sections 71.

The lower part 59 and the upper part 60 can form, for example, the front frame of a letter slot, which can be exposed to strong temperature fluctuations. The inventive arrangement of the locking pins 69 in elongated holes 68 and the correspondingly arranged undercuts 66, 67 enable relative movements between the upper part and the lower part as a result of temperature fluctuations and the resulting expansion or contraction, in particular of the upper part 60.

The invention is not restricted to the exemplary embodiments described, which can be modified in various ways. For example, in the embodiments according to FIGS. 1 to 5 it is also possible to first produce the plastic sheath 16 or 38 of the fittings or fittings using the injection molding process and then, analogously to FIG. 6, the filler pieces 10 and 30 subsequently in the finished sheath insert and glue, screw or otherwise secure. This has the advantage that no blind bores need to be provided in the filler since the bores can pass through and that the outer sections of the transverse bores can be formed in the outer plastic jacket of the parts during the spraying process, i.e. do not need to be drilled. In addition, as with the production method according to FIGS. 1 to 6, simple injection molds can be used.

Instead of the procedure described with reference to FIG. 3, provision could be made to provide only the bore 17 in the filling piece 10 and to cover it during the injection molding process or to fill it with a stopper.

The material from which the filler pieces are made can largely be chosen freely. In many cases, it is preferred to provide filler pieces made of metal or steel so that the function is retained even in the event of a fire, which is particularly important when the fittings according to the invention are used on fire protection doors.

Instead of the plug 26 in FIG. 4, for example, a cap placed on the bore 25 can be provided, which only needs to be drilled through after the filling piece 10 has been encapsulated.

In the embodiments according to FIGS. 1 to 8, the locking pin is pressed into the transverse bore by a small compression spring 6. However, since the spring force of this compression spring 6 cannot be chosen arbitrarily large due to the mostly narrow spatial conditions, the locking pin can often be pushed back with little force, so that the anti-theft device caused by the outer section 15, 36 of the transverse bore is not always considered sufficient. According to a particularly preferred embodiment of the invention, it is therefore provided that the two fittings or fittings are braced against one another by at least one spring element in such a way that the locking pin is arranged with a clamp fit in the transverse bore after the two parts have been joined.

Fig. 5 shows such an additional anti-theft device by means of a coil spring 45, which is arranged in a recess on the door-side end of the first push handle 27 and one end of which is supported on the door 29, while the other end on a shoulder delimiting the recess on the end remote from the door the push handle 27 abuts.

In this arrangement, the push handle 27, in order to allow the locking pin 44 to snap into the transverse bore 34 without friction, is first pressed against the door 29 during assembly and then released after the locking pin 44 has been locked in place. The helical spring 45 then pushes the push handle 27 away from the door until the locking pin 44, after overcoming the slight radial play between it and the transverse bore 34, presses against the wall delimiting it. If the spring force of the coil spring 45 is dimensioned sufficiently large, the locking pin 44 can then only be pushed back with considerable effort. With knowledge of the secret, on the other hand, a small amount of force is sufficient if at the same time the push handle 27 is pressed against the door and the clamp seat of the locking pin 44 is thereby loosened.

In addition to the embodiments according to FIGS. 1 to 8, in which each first part in each case has a receiving opening into which the second part is wholly or partly inserted, it is possible to provide a number of first parts each having a receiving opening, which one are assigned to the second part, which has a multiplicity of segments which can be inserted into the receiving openings, so that a second part can be combined with a multiplicity of first parts.

Alternatively, the first part could be provided with two or more receiving openings and a second part or two segments of a single part could be assigned to each receiving opening. The upper part of a shelf, a towel holder or a toothed glass holder, for example, could be provided on its back with two receiving openings, each of which is placed on a plug-like or block-like segment attached to the wall and fastened to it by means of the fastening device according to the invention. Each of these segments forms a part that is inserted as a whole into the receiving opening. 9 to 24 show two such embodiments of the fastening device according to the invention using the example of a towel rail and a tooth cup holder.

According to FIG. 9, a fitting part 75 designed as a dog towel bar extends essentially parallel to a wall 76. At both ends, the towel bar is bent in the direction perpendicular to the wall and merges there into a fastening end piece 77, which is connected via a bracket from FIG visible base 80 is screwed to the wall 76, which forms the second fitting part and is designed as a fully insertable into a receiving opening of the fastening end piece 77.

F _i g. 10 shows as a fitting part a tooth cup holder 78 which has a circular sector-shaped inner edge for holding the tooth cup and two fastening end pieces 79 pointing perpendicular to the wall 76, which are screwed onto the wall 76 via base 80 shown in FIG. 16. The bases 80 can be inserted completely into receiving openings in the attachment end pieces 79.

The side view of the fitting parts shown in FIGS. 9 and 10 results from FIG. 11.

According to FIGS. 12 to 14, the substantially circular cylindrical base 80 has in the middle a screw hole 82 through which a fastening screw 83 with a head 84 is passed. The threaded end of the screw 83 extends into a dowel 86 arranged in a bore 85 in the wall 76. The flat end face 87 of the base 80 lies flat against the wall. The head 84 of the screw presses against the opposite end face 88, which surrounds the screw hole 82. In this way, the base 80 is held firmly on the wall 76.

On its outer surface, the base 80 has, according to the invention, a radially projecting spring 90 (or groove 91) which runs parallel to its axis 89 and which, for perfect rotational alignment between the base 80 and the fastening end piece 77 of the fitting part 75, extends into a groove running parallel to the axis 89 91 (or spring 90) engages on the inner wall of the fastening piece 77.

The fastening end piece 77 is circular-cylindrical on the outside and has a circular-cylindrical receiving opening 92 on the inside, which is open towards the wall 76 and is closed on the inside according to the invention by conical inclined surfaces 93 which form an angle α of approximately 45 ° with the axis 89 of the base 80.

5 corresponding spring element due to the central screw hole 82 in the base 80 for space reasons can hardly be accommodated, because of the groove 91 would adversely affect the wall thickness of the fastening piece 77, forms a loose part that can be lost, and at tends to corrode when used in wet rooms, instead of this helical spring 45 spring elements in the form of spring tabs 94 are provided, which extend from the end face 88 of the base 80 remote from the wall according to FIGS. 12 to 14 in an essentially axial direction. These are made in one piece with the base 80 and can therefore be produced together with this from a plastic injection-molded part and start from the outer edge region thereof. In a region 95, the spring tabs are at a certain distance from the inner wall of the receiving opening 92 and only come into contact with the inclined surfaces 93 with their inclined end surfaces 96.

According to FIG. 13, each spring tab 94 has an approximately circular sector shape in cross section and extends over an angle of somewhat less than 90 °. Between the individual spring tabs 94 there are circumferential spacings 97 that allow compression.

In order to save space, it is expedient if the outer surfaces 98 of the spring tabs according to FIGS. 12 and 14 converge somewhat towards the axis 89 in the direction pointing away from the wall 76. This results in a better adaptation to the curvature of the fitting part 75. Longer spiral spring tabs 94 can thus be accommodated in the receiving opening 92. The receiving opening 92 converges somewhat conically in the area 95.

At its end facing away from the wall, the spring 90 according to FIG. 14 has run-in bevels 99, by means of which the fitting of the fitting part 75 onto the base 80 is facilitated.

12 and 20 to 22, a transverse bore 100 is provided in the inner wall of the fastening end piece 77, in which a radially movable locking pin 101 engages. Analogous to the transverse bores 12, 34 and 68 (FIGS. 1.5 and 8), this outer bore 100 is provided with an inner portion corresponding to the size of the locking pin and an outer portion with a much smaller diameter. The diameter of the locking pin 101 is slightly smaller than the diameter of the inner portion of the transverse bore 100, so that when a force is exerted on the fitting part 75 from the wall, the slight play a indicated in FIG. 12 between the locking pin 101 and the edge of the transverse bore 100 results.

The locking pin 101 is made of plastic, for example. Fabric existing socket 102 guided radially, which in turn is housed in a correspondingly larger bore 103 in the wall of the base 80. Snap hooks 104 secure the position of the bushing 102 in the bore 103.

The locking pin 101 is hollow in its rear area in order to receive a helical spring 105 which biases it radially outward and which is supported on a material web 106 which is provided next to the screw hole 82 in the base 80. The bore 103 for the bushing 102 ends on the inside of the material web 106, while it is open radially outwards.

According to FIGS. 20 to 22, the bushing 102 has an inwardly projecting flange 107 radially on the outside, against which an annular step 108 of the locking pin 101 bears under the action of the spring 105.

According to FIG. 22, the bushing 102 has notches 109 on diametrically opposite sides, in which the snap hooks 104 are located on a cylindrical bushing part 110 Extend inward to screw hole 82. The snap hooks 104 engage in a groove 111 (FIGS. 12, 13 and 20) which runs on both sides of the material web 106 and thus forms stop corners 112 for the snap hooks 104. Due to this design, the plastic bushing 102 with the locking pin 101 and the helical compression spring 105 used can be inserted radially from the outside into the bore 103 until the snap hooks 104 snap behind the stop corners 112. The locking pin 101 is then completely fixed in the base 80 by the action of the spring 105.

21 and 22, the outer edge surface 114 of the socket 102 is circular and flush with the outer surface of the base 80.

According to FIG. 12, the fastening end piece 77 on the inside in the area where the locking pin 101 enters when the fitting part 75 is placed on the base 80 has a run-in slope 115, along which the locking pin 101 can slide, after which it pushes back so far inside the socket 102 until it is flush with the outer edge of the base 80. The locking pin 101 can now slide along the inner wall of the fastening end piece 77 until it is aligned with the transverse bore 100, into which it then snaps due to the action of the spring 105.

The fitting of the fitting according to FIGS. 12 to 14 and 20 to 22 proceeds as follows:

First, the base 80 is screwed onto the wall 76 at the required distance. Then the fitting part 75 with the fastening end pieces 77 is pushed onto the base, the locking pins 101 sliding along the run-in bevels 115 and being pushed inwards with compression of the springs 105. In order to enable this return movement of the locking pins 101, a clearance A is provided between the end of each locking pin 101 and the material web 106 according to FIG. 20.

Even before the locking pin 101 comes into alignment with the transverse bore 100, the inclined end surfaces 96 of the bending tabs 94 bear against the correspondingly inclined inclined surfaces 93 of the fastening end pieces 77. When the fitting part 75 is pushed further onto the base 80, the spiral spring tabs 94 are then bent slightly inwards while sliding along the inclined surfaces 93, and this continues until the locking pin 101 can finally snap into the transverse bore 100 aligned with it. Due to the spring action of the tabs 94, any radial play between the fastening end pieces 77 and the bases 80 is avoided. Due to the inclination of the inclined surfaces at the angle oC, an axial force component is also generated in the direction away from the wall, which leads to the fastening end pieces 77 being placed so far away from the wall until the edge of the transverse bore 100 facing the wall 76 is firmly attached the edge of the locking pin 101 facing the wall 76 abuts and is held in the transverse bore 100 with a clamp fit. Between the end face (FIG. 12) of the fastening piece 77 and the wall 76, however, there remains a correspondingly small play 116, which is functionally necessary to achieve the bracing according to the invention.

15 shows a modification of the base 80 according to the invention with spiral spring tabs 94, in which thin spring steel bars 117 are embedded parallel to the axis 89. The spring properties of the spring tabs 94 are improved by the spring steel rods 117. The rods 117 expediently extend a little further into the actual base 80. A spring steel rod 117 is preferably arranged in each of the spring tabs 94. Such metal spiral spring inserts are expediently provided if the resilient properties of the base material are not sufficient to create a permanent, resilient tension. This not only has the advantage that independently of the choice of the plastic used for the base, sufficiently high spring forces can be generated or a small drop in the spring forces is guaranteed by relaxation processes. Rather, the spring steel rods are very cheap to manufacture and are protected against corrosion by the embedding.

According to the exemplary embodiment according to FIGS. 16 to 19, in which the same reference numerals designate corresponding parts as in the previous exemplary embodiment, the base 80 is subdivided into a base upper part 118a and a lower base part 118b which are connected to one another along a spherical cap surface 119 by certain tolerances balance.

Since the fastening end piece 79 is arranged on a toothed cup holder 78, where less space is available for the arrangement of the receiving opening 92 in the area of a rounding 120, according to the invention only two spring tabs 94 are provided on the side of the receiving opening 92 facing away from the rounding 120 each (Fig. 17) extend over a little more than 90 °. No spring tabs are provided on the side of the base 80 facing the curve 120. If necessary, shorter spring tabs could also be arranged there.

19 that the bore 103 in the area of the snap hooks 104 can have radial grooves 121 and that the snap hooks 104 can have a greater radial extension than the otherwise circular bushing 102 so that they fit into the grooves 121 in a sliding fit and secure the bushing 102 against rotation and axially.

23 and 24, at the end of the base 80 facing away from the wall, a ring 122 made of sheet steel with integrally formed flexible spring tabs 123 made of steel is arranged. The rim 122 surrounds the end of the base 80 facing away from the wall, so that here too there is a firm connection between the spiral spring tabs 123 and the base 80.

23 and 24, the individual spring tabs 123 again extend over an angle of approximately 90 ° each. The distance 97 is again between the individual spiral spring tabs.

The embodiment according to FIGS. 23 and 24 has the advantage that the resilient properties of the spiral spring tabs can be selected independently of the material of the base. Although it is preferred that the flexible spring tabs made of other material are firmly connected to the base, they can in principle also form a loose additional part to be attached to the base. It is also possible to arrange the sheet metal bending spring tabs formed as a coherent ring in the hollow cylindrical receiving opening of the fastening end pieces of the fitting parts such that they can be displaced a certain distance in the longitudinal direction of the fastening end pieces, but are secured against falling out of the receiving openings.

A kinematic reversal of the spiral spring tabs and inclined surfaces is also conceivable in such a way that the spiral springs extend from the inner end face of the receiving opening of the fastening end pieces in the direction of the base and run against inclined surfaces of the base, which are provided on the end surface of the base facing away from the wall contact surface.

The bending springs according to the invention have the task of moving the first fitting part away from the wall after it has been pushed onto the base and the radially displaceable locking pin has engaged until the transverse bore in the fastening end pieces is in firm axial engagement with the locking pin. In addition, the flexible spring tabs are intended to prevent the first fitting part from being displaced in the direction of the wall by slight forces relative to the base after reaching this position of use. However, the corresponding counterforce must not be too great, because otherwise the fitting part and base will be too difficult to assemble. With a handle or a towel rail that can be easily pressed onto the base in jerks, a joining force of 500 N is not too great. In general, however, is such a high joining force appropriate spring force is not required. The joining forces can therefore generally remain smaller.

It is particularly advantageous if the spiral spring tabs e.g. are made of polyoxymethylene and the inclined surfaces of the fastening end pieces are made of polyamide. The coefficient of friction between the sliding surfaces can reach a size of approx. 0.3 for unlubricated surfaces and approx. 0.1 for lubricated surfaces.

The fittings or fittings according to the invention are preferably made of thermoplastic, so that they can be manufactured economically by known injection molding processes.

In order to generate sufficiently large spring forces in the receiving openings of the fastening end pieces even when space is limited, the inclined surfaces should preferably enclose angles of 40 to 60 ° with the base axis.

Under certain circumstances, it is advisable to lubricate the inclined surfaces before joining the base and the fittings. Lubrication makes assembly easier, since the attachment of the fastening end pieces to the base is possible with less force. On the other hand, it is also possible to move the fitting part against the spring force in the assembled state more easily. For this reason, it is particularly advantageous to use a rapidly evaporating lubricant, e.g. Water to use during assembly, which facilitates assembly, but later does not reduce the friction between the spring tabs and the inclined surfaces, so that a relative displacement between fastening end pieces and bases is only possible after overcoming large frictional forces.

If the flexible spring tabs are made together with the base from the same thermoplastic material, it must be ensured that the thermoplastic used Plastics do not tend or only slightly to stress relaxation. Partially crystalline plastics, in particular polyoxymethylene or linear polyester, which have a low to medium tendency to creep and are less susceptible to stress cracking, are therefore most suitable for the flexible spring tabs and the base. The high rigidity of such plastics also allows space-saving dimensioning of the spiral springs.

Furthermore, it can be advantageous if the plastic has a glass fiber additive at least in the area of the spring tabs. As a result, the creep behavior and the rigidity of the thermoplastics used can be further improved.

Above certain limit strains, thermoplastics are often damaged by cracking and local microscopic stretching zones. According to a further advantageous embodiment, the spring tabs are to be dimensioned in the manufacture from the partially crystalline thermoplastic materials mentioned so that the maximum elongation in the latched position does not exceed 1%, if possible. When using glass fiber filled thermoplastics, this elongation should be below 0.5 to 0.8% if possible.

For practical purposes, it is advantageous if the spring tabs are designed so soft that essentially the same spring forces are present in the entire suspension interval. The constancy of the spring forces to be aimed at according to the invention over the spring travel interval therefore requires springs of rather low hardness, which are also deformed so much in the front end position that sufficiently high spring forces still arise in this position. The spring tabs must be dimensioned accordingly. In addition, the inclined surfaces of the spring tabs and the fastening end piece must be arranged so that they come into contact with each other sufficiently far before the front end position.

According to the invention, a single spring tab on each base is generally sufficient. However, several spring tabs are preferably provided.

If, for special reasons, it is desired to achieve a progressive increase in the spring force when pushing the fastening end pieces onto the base or in the vicinity of the rear end position, several spiral springs are left. not at the same time, but step by step onto the inclined surfaces of the fastening end pieces by giving the spring tabs different lengths or arranging the inclined surfaces in a stepped manner in the longitudinal direction. To increase this effect, the shorter springs can also be made thicker and therefore stiffer.

If, however, in a further embodiment, the cross sections of the spring tabs are reduced at their free end to approximately half of their root cross section, the front spring sections take on a larger proportion of the spring work, and the maximum elongation is reduced by approximately 40%.

Preferably, the cross-section is reduced by the fact that the outer spring flanks of the spring tabs form an angle with the base axis, i.e. that the free ends of the spring tabs taper towards the base axis.

This training gives an additional manufacturing advantage in the manufacture of the fitting part by injection molding from plastic. If, for example, the fastening ends in a towel rail are relatively thin-walled due to the recesses for the base near the wall, it is important to transfer this thin-walled area as continuously as possible into the subsequent massive part of the rod, since abrupt changes in cross-section lead to tension and also to the outside of the Can draw a rod. The conical taper of the base according to the invention offers the possibility of conically narrowing the recess in the fastening ends. The sloping surfaces adjoining this constriction have a correspondingly advantageous effect. This production-technically advantageous design of the recess is an advantage of the base according to the invention, which would not be given, for example, if a helical spring was clamped between the base and the end face of the recess.

If, for reasons of space, it is critical to achieve sufficiently high spring forces with the spiral spring tab without unfavorably stretching the material, the spiral springs are preferably made as long as possible. A doubling of the spring length leads to a reduction in the maximum elongation to 50% with the same spring force and the same spring hardness.

Under critical spatial conditions, the spiral spring tabs are made as wide as possible, i.e. that they should be arranged directly on the outer circumference of the base. In the case of a cylindrical base, this means that the bases have a cross section in the form of an arc segment. By doubling the width, the maximum stretch can be reduced by around 25%.

Claims (30)

1) Fastening device to detachably connectable fittings or equipment ^p , which have mutually associated first and second parts, each first part having at least one receiving opening and the second part either having at least one segment which can be inserted into the receiving opening or as a whole one into the Receiving opening insertable segment forms, and wherein the fastening device consists of at least one slidably mounted in the segment, resiliently projecting locking pin and at least one formed in the first part, arranged transversely to the axis of the receiving opening and extending from this to the outer surface of the first part, in which the locking pin snaps into place resiliently and releasably from the outside when the segment is inserted, characterized in that the transverse bore (12, 34, 68) has an inner section (14, 35, 57, 14) adjacent to the receiving opening (2, 31, 48). 70) with at least the outer cross-section tt of the locking pin (4,44,56,69) corresponding cross-section and an outer section (15,36,58,71) bordering the inner section and the outer surface of the first part (1,27,46,60) in comparison with one cross-section significantly reduced to the inner portion. 2) Fastening device according to claim 1, characterized in that the inner portion (70) of the transverse bore (68) is designed as an elongated hole. 3) Fastening device according to one of claims 1 to 2, characterized in that the segment consists of a mandrel (3, 55) and the receiving opening (2,48) has an inner cross section adapted to the outer cross section of the mandrel. 4) FIXING _F multiplexing frame generating apparatus according to claim 3, characterized in that the receiving opening is formed in an inlaid in the first part and in this fixed filler (10,30,49) (2,31,48). 5) Fastening device according to claim 4, characterized in that the filler (49) consists of a sleeve and the inner portion (57) of the transverse bore is limited by the rear edge of the sleeve. 6) Fastening device according to claim 4, characterized in that the inner portion (14.35) is formed in the filler (10.30). 7) Fastening device according to one of claims 3 to 6, characterized in that the inner portion (14,35,70) is designed as a blind hole. 8) Fastening device according to one of claims 1 to 7, characterized in that the fitting parts (1) are door handle parts, the locking pin (4) being mounted on the outer end of a handle pin (3) fastened to the second door handle part, while the first door handle part (1 ) has the receiving opening (2) for the trigger mandrel (3) and the transverse bore (12). 9) Fastening device according to claim 8, characterized in that the pusher parts consist of plastic and the receiving opening (2) and the transverse bore (12) in one with plastic (16) molded filler (10) of the pusher part (1) are formed. ₁₀ ) Fastening device according to one of claims 4 to 9, characterized in that the filler (10) has the inner section (14, 23) of the transverse bore and a second bore (17, 25) opposite it, which is coaxial and has the same cross section, and that the outer cut and the locking pin (4) are optionally assigned to the inner section (14, 23) or the bore (17, 25). 11) Fastening device according to one of claims 8 to 10, characterized in that the axis of the transverse bore (12) is arranged perpendicular to the axis (11) of the receiving opening (2) and parallel to the axis of the handle of the pusher part (1). 12) Fastening device according to one of claims 1 to 7 and 10, characterized in that the fitting parts consist of two push handles (27, 28), the locking pin (44) on the outer, thread-free section (41) in the second push handle (2R ) screw-in fastening screw (40), while the first push handle (27) has the receiving opening (31) for the unthreaded section (41) of the fastening screw (40) and the transverse bore (34). 13) Fastening device according to claim 12, characterized in that the push handles (27,2R) consist of plastic and the receiving opening (31) and the transverse bore (34) fastened in the first push handle (27), with molded plastic filler (30) are trained. 14) Fastening device according to one of claims 4 to 13, characterized in that the filler (10, 30, 49) is ordered on metal 15) Fastening device according to claim 13 or 14, characterized in that a circumferential groove (33) is formed in the outer wall of the filler (30). at least 16) fastening device according to / one of claims 1 to 7, characterized in that the two equipment parts consist of two arms (46, 47) of a towel holder, the locking pin (56) at the free end of a cylindrical, in the second holding arm (47) fastened mandrel (55), while the receiving opening (48) consists of the cylindrical central bore of a sleeve (49) fastened in the first holding arm (46), the rear edge of which is arranged in the first holding arm (46) and forms a free space forming the inner section of the transverse bore ( 57) limited. at least 17) fastening device according to / one of claims 1 to 7, characterized in that the two equipment parts consist of a lower part (59) which can be fastened to a wall or the like and an upper part (60) which surrounds the lower part (59) on all sides and the locking pin ( 69) on the lower part (59), while the transverse bore (68) is formed in a side wall (65) of the upper part (60). 18) Fastening device according to claim 17, characterized in that the lower part (59) has a plurality of locking pins (69) and the upper part (60) has a corresponding plurality of transverse bores (68). 19) Fastening device according to at least one of claims 1 to 18, characterized in that the two fitting or fitting parts (27, 28 or 75, 80) are braced against one another by at least one spring element (45, 94, 123) such that the locking pin ( 44,101) with a clamp fit in the transverse bore (35,100). 20) Fastening device according to one of claims 1 to 19, characterized in that the segment (80) at its end remote from the wall with at least one spring element (94, 123) which projects substantially from the wall and can be bent towards the axis (89) of the segment (80). is provided in the form of a spring tab that at the end of the receiving opening (92) an inclined surface (93) extending obliquely to the axis (89) of the segment (80) is formed and that the spring element (94, 123) in the assembled state of the fitting or equipment parts (75, 80) is in contact with the inclined surface (93) for the purpose of eliminating any axial and / or radial play which may exist between them. 21) Fastening device according to claim 20, characterized in that the spring element (94) with the segment (80) consists of one piece. 22) Fastening device according to claim 20 or 21, characterized in that the spring element (94, 123) contains a metal bending spring insert (117) extending in its longitudinal direction or is an additionally attached sheet metal bending spring (123). 23) Fastening device according to claim 20 or 21, characterized in that the spring element (94) and the segment (80) made of partially crystalline plastics, in particular polyoxymethylene, or linear polyesters (PETP crystalline and PBTP). 24) Fastening device according to at least one of claims 20 to 23, characterized in that the cross section of the spring element (94) is reduced at its free end to about half of the root cross section. 25) Fastening device according to at least one of Claims 1 to 24, characterized in that the locking pin (101) is mounted in a radially displaceable manner in a bushing (102) inserted into a radial bore (103) of the segment (80) and by a spring (105) is biased outwards and that the sleeve (102) is interrupted at least once on its circumference by a snap hook (104) running in its longitudinal direction, which engages behind the inner end of the radial bore (103). 26) Process for producing the fitting or fitting part for a device according to one or more of claims 1 to 25 by injection molding, characterized in that firstly a filler (10, 30) having the receiving opening (2,31) is produced, the wall of the filling piece (10, 30) surrounding the receiving opening (2, 31) for the purpose of producing the inner section (14, 35) of the transverse bore (12, 34) with at least one that runs perpendicular to the axis of the receiving opening (2, 31) of the wall section located on one side of the receiving opening (2, 31) is provided with a through hole (17), the filler (10, 30) is overmolded with plastic, preventing plastic from penetrating into the inner section (14, 35) and finally through the overmolded wall section (16, 23) of the fitting or fitting part (1, 27) is pierced for the purpose of producing the outer section (15, 36) of the transverse bore (12, 34). 2 ₇ ) Method according to claim 26, characterized in that the bore (17) before the spraying process with a stopper (26), after the spraying process on the stopper (26) bordering, obtained by the spraying process wall section of the fitting or equipment part for the production of the outer section of the transverse bore and then the plug (26) for the production of the inner section of the transverse bore is removed by means of a tool inserted through the outer section of the transverse bore. 28) Method according to claim 2'6, characterized in that the bore (17) is covered with a cap on the inside before the molding process and after the spraying process the wall section of the fitting or fitting part bordering on the cap and obtained by the spraying process and the Be pierced cap to produce the outer portion of the cross hole. 29) Method according to at least one of claims 26 to 28, characterized in that the wall of the filling piece (10, 30) surrounding the receiving opening (2, 31) is provided with a bore which is located on one side of the receiving opening (2, 31) located completely through the wall section and is formed in the wall section located on the opposite side of the receiving opening (2,31) as a blind bore which forms the inner section (14,35) of the transverse bore (12,34), and that after the spraying process both the wall section (21) of the filler piece (10, 30) delimiting the blind bore and the adjoining wall section (16, 32) of the fitting or fitting part (1, 27) obtained by the injection molding process for the purpose of producing the outer section (15, 36) the cross hole (12,34) are pierced. 30) Method according to claim 29, characterized in that for the production of a second inner portion of the transverse bore (12, 34) during the spraying process, the penetration of plastic into the through bore (17) is also prevented and, after the spraying operation, the wall portion (21 ) of the filler (10, 30) and the adjacent wall section (16, 32) obtained by the spraying process and / or the wall section (16, 32) adjacent to the through hole (17) also obtained by the spraying process for the purpose of production. at least one outer section (15, 36) of the transverse bore (12, 34) can be drilled through.

Images