AT515568A2 - Pot hole insert, cover fixing element and cup hinge - Google Patents

Abstract

The invention relates to a Topflocheinsatz for insertion into a Topflochbohrung (2) of a furniture part with a cup-shaped base body (10). The pot-hole insert is characterized in that a fastening ring (20) is provided which at least partially surrounds the base body (10) and has outwardly facing projections (24) which can be pressed outwardly for fastening the pot-hole insert in the pot-hole bore (2). The invention further relates to an aperture fixing element and a cup hinge with such a pot hole insert.

Description

Pot hole insert, cover fixing element and cup hinge

The invention relates to a Topflocheinsatz, which can be inserted into a Topflochbohrung, which is introduced into a furniture part, and which serves for Befesti¬gung of, for example, hardware components on the furniture part. The invention further relates to a panel fixing element and a Topfschar¬nier.

Pot hole bores are used in furniture construction to arrange furniture fittings or parts of furniture fittings sunk in a piece of furniture and set to the furniture part. Door hinges, for example, often have a pot hole insert, with which a first hinge element on the inside of a door is inserted into it and over which the hinge is fastened to the door. These hinges are also referred to as cup hinges. The pothole inserts used for this purpose usually have two radially protruding tabs which rest on the surface of the furniture door and are screwed on there in order to fix the pot hole insert in the pot hole.

Cup-hole inserts are also used in attaching a front panel to a drawer, in which case the pot-hole insert carries a pin perpendicular to the panel, which is inserted into a corresponding bore in a side frame of the drawer. At the end of the pin a gripping behind head is formed, with the help of the Zap¬fen and thus the front panel can be used on the side frames. Such Topflocheinsätze are provided radially with circumferential locking projections, with which they - possibly supported by a Verkle¬bung - in the Topflochbohrung the aperture stuck. Another use find Topflocheinsätze with cut machine threads. These are used to make fittings or the like. with the help of machine screws to attach to a (wooden) furniture part.

The listed types of attachment for the Topflocheinsätze in or on the furniture part are disadvantageous for various reasons. Screwing the overhanging tabs is labor-intensive and can not be used, for example, for window mounting, in which the panel is intended to lie flush against the frame. An attachment via a lock / jam is not loadable and therefore usable for some applications only in combination with a bond. However, this is often undesirable due to the increased workload during assembly. Also, a separate recycling of metal and wood components is not possible with bonded pothole inserts. Just as little can the pot hole insert be reused after an aperture exchange.

It is therefore an object of the present invention to provide a universal hole insert to be used universally in connexion with furniture fittings, which can be securely and highly resiliently fixed in a pot hole with little installation effort. It is a further object to provide a blind fastener and a cup hinge which can also be easily fixed in a pot bore.

This object is achieved by a Topflocheinsatz or a hinge and a Blendenbefestigung with the respective features of the independent Ansprü¬che. Advantageous embodiments and further developments are the subject of the dependent claims.

An inventive Topflocheinsatz of the aforementioned type is characterized by the fact that the base body at least partially surrounding mounting ring is provided which has outwardly facing projections, which are herausdrückbar outwardly for fastening the Topflocheinsatzes in the pot hole. The projections are pressed by pushing out laterally in the Topflochbohrung in the material of the furniture part in which the Topflochbohrung is introduced, and put the pot hole insert so sure in the furniture part, without the need for additional screws or glue or other fasteners. When replacing the panel, at least the base body can be reused.

In an advantageous embodiment of the pot-hole insert, the projections are pressed outward by a rotary movement of the base body relative to the fastening ring. For this purpose, the base body has ramps and the fastening ring has bevels which interact in such a way that the fastening ring is deformed in the region of the projections. About the run-on slope and the co-operating slope a rotational movement of the body relative to the mounting ring is converted into an outwardly directed movement of the projections, whereby the preferred claw-like projections press into the material of the furniture part. The cumbersome assembly process is thus reduced to insertion of the Topflocheinsat¬zes in the Topflochbohrung and a rotation of the body against the mounting ring. This may have lateral spring tongues, which prevent twisting of the mounting ring in the pot hole, as long as the projections have not yet penetrated into the material of the furniture part.

In a further advantageous embodiment of the pot-hole insert, the base body has a middle, waisted region between an upper plate and a lower plate, wherein the fastening ring is arranged around the central, tailed region and between the upper plate and the lower plate. In this way, the base body and the fastening ring are in particular so interconnected in the mounted state that a tensile load can be exerted on the base body.

In a further advantageous embodiment of the pot-hole insert, the basic body has at least one guide groove along at least one section of its circumference, which cooperates with a guide nose of the fastening ring. Conversely, the guide groove can also be formed on the fastening ring and the guide nose on the base body. This, too, serves as a connection of the base body and the fastening ring, which can be loaded in tension. In addition, a further rotation can be prevented by guiding grooves. -Nase are tapered shaped and wedged into each other.

In an alternative advantageous embodiment of the pot-hole insert, the base body has a cylindrical basic shape and is circumferentially provided at least in sections with a thread. In this case, the fastening ring preferably has at least two, more preferably at least three

Threaded sections in order to screw the main body in the mounting ring can. In this embodiment, the mounting ring is preassembled in the pot hole of the furniture part and the main body is screwed into the mounting ring.

In this case, the projections between the threaded sections are preferably positively positioned, wherein the fastening ring is twisted around a tangential axis in an unassembled state in the region of the projections in such a way that the outward-pointing projections do not protrude beyond the radius which the fastening ring in the Has range of threaded sections cuts. Thus, the Festungsring can be inserted into the Topflochbohrung before the projections are pressed to the outside, which can be done for example by means of a Montagehilfs¬werkzeugs, which is inserted into the mounting ring and deformed the mounting ring in the region of the projections by means of radially outwardly displaceable sliders.

In a further advantageous embodiment of the pot-hole insert, the fastening ring made of metal is produced in a stamping / bending process. The Grund¬ body may be a one or more parts plastic injection molded part. Both allow a cost-effective production of Topflocheinsatzes. Preferably, the attachment ring is made of a spring steel. In this case, after disassembly, the entire pot hole insert may be reused since the projections of the attachment ring may spring back to the home position after removal of the base body and the attachment ring may be removed from the pot hole. Thus, a separate recycling of the furniture part by separation of the materials wood (furniture part) and Me¬tall (mounting ring) in a simple manner possible.

In a further advantageous embodiment of the pot-hole insert a tool holder is formed in the basic body, in particular in the form of a polygonal opening. By means of this polygonal opening, for example a hexagonal opening, the torque necessary for rotating the base body relative to the fastening ring or for screwing the base body into the fastening ring can be exerted on the base body.

An inventive panel fastening element and a concealed hinge according to the invention are characterized by the use of such a pothole insert. This results in the advantages described above.

The invention will be explained in more detail below on the basis of exemplary embodiments with the aid of FIGS. The figures show:

1a, b is a perspective and a side view of a Möbelblen¬de with inserted aperture fixing elements;

FIG. 2 is an isometric view of the diaphragm fixing element inserted into the diaphragm in FIG. 1; FIG.

Fig. 3 is an isometric view of a main body of a

Topflocheinsatzes of the shutter fastening element of Fig. 2;

Fig. 4 is an isometric view of a mounting ring of

Topflocheinsatzes of the shutter fastening element of Fig. 2;

5 is a sectional view of the Blen¬ denbefestigungselements inserted into the panel.

Fig. 6 is an enlarged view of a detail of Fig. 5;

FIG. 7 is a detail view of the shutter fastening element inserted into the panel in an isometric oblique view; FIG.

8a, b are each an isometric view of a diaphragm attachment element in a further exemplary embodiment;

Figs. 9a to 9e are various diagrammatic views illustrating the assembly operation of the shade fixing member of Figs. 8a, b; and

10a, b are each a side view of a pot hinge with a pot hole insert.

1 a shows an isometric view of the rear side of a panel 1 facing a drawer. Such a panel 1, also called a front panel, closes off a drawer from the front and is usually fastened to side frames of the drawer. For this purpose, in the lateral outer region, pot-hole bores 2 are bored on both sides into the panel 1, in each of which a panel-mounting element according to the application is mounted. The bezel attachment member has a pot-hole insert with a base body 10 which is flush recessed in the Topflochbohrung 2 and in the manner described in more detail below in the Topflochbohrung 2 is attached. The main body 10 carries centrally a pin 30 projecting perpendicularly to the upper side of the base body 10, over which an attachment to the respective side frame of the drawer takes place.

Fig. 1 b shows the panel 1 in a side view. In this side view, it can be seen clearly that the main body 10 is completely embedded in the pot hole 2 and does not protrude beyond the surface of the panel 1 at any point. Furthermore, it can be seen that the pin 30 has a thickened cylindrical area, with which a precise fit in a corresponding bore of the side frame takes place. Furthermore, the pin 30 has a thinner shaft 31 opposite the cylindrical central region, which carries a thickened head 32 at the end. The head 32 is hin¬tergriffen in the side frame, whereby the panel 1 can be used on the side frame.

It will be understood that the precise design of the pintle 30 pintle is purely exemplary and in other embodiments may differ from that shown herein. The illustrated Blendenbefesti¬ gungselement represents only one application for the following described in more detail Topflocheinsatz.

2 shows the panel fixing element in an isometric drawing prior to assembly in the panel 1. In this figure, the substantially schei¬ben- or cup-shaped configuration of the body 10 can be seen, the ei¬ne upper plate 11, in the centrally one Polygonal opening 12, present hexagonal opening, is arranged. The design of the central opening is purely exemplary and may also have a different shape. Furthermore, the base body 10 has a lower plate 13, which - not visible in this figure - is substantially flat on its underside. In the middle region between the two plates 11, 13, a fastening ring 20 is placed around the main body 10. The pin 30 may, for example, be screwed into a screw dome which is formed on the lower plate 13 of the pot hole insert.

The two components of the cup-hole insert, the main body 10 and the fastening ring 20, are enlarged in each case in an isometric drawing in FIGS. 3 and 4 and shown separately.

From Fig. 3 it can be seen that the base body 10 in the central region zwi¬schen the upper plate 11 and the lower plate 13 has a waisted portion 14 around which the ring 20 (see Fig. 2) is placed. The central waisted region 14 has a smaller diameter than the upper and lower plates 11, 13, with the plates 11, 13 protruding beyond the central region 14 at any point of the circumference. It is a mount for the Befesti¬ gungsring 20 is formed.

Furthermore, the central waisted portion 14 is not cylindrical in shape, but has along its circumference by bulges and indentations variie¬rende distances to the center. In particular, a section of the circumference is designed as a starting bevel 15, along which the radius increases continuously. The central waisted region 14 has repetitive contours, in the illustrated embodiment in four times Wie¬derholung. The aforementioned run-on slope 15 is therefore offset by 90 degrees four times along the circumference of the central waisted area 14 again.

To the run-up slope 15, a region with gleichbleiben¬ the extent follows and in turn in each case a step 16, at which the radius decreases from its largest value back to the smaller value at the beginning of the next adjoining ramp 15. Furthermore, in the middle between the upper and lower plates 11, 13, a guide groove 17 is inserted into each of the chamfers 15, which extends into the adjoining region of the constant radius. The guide groove 17 has an approximately trapezoidal profile whose width and depth decreases along the run-up slope 15 and the adjacent area.

4 shows details of the attachment ring 20. This also has a fourfold symmetry corresponding to the central waisted region 14 of the base body 10. In each of the four sections, an outwardly projecting spring tongue 21 is initially arranged, as well as an oblique region 22 corresponding to the run-on slope 15. Correspondingly, corresponding steps 23 are provided for the step 16 of the base body 10. In the area of the steps 23, an outwardly protruding projection 24, here in the form of a claw, is shown in each case. Finally, in the field of

Anlaufschräge 22 inwardly a guide lug 25 pronounced, which cooperates with the guide groove 17 of the body 10 and tapers in its profile in a similar manner as the guide groove 17.

Along its circumference, the fastening ring 20 is slotted in one place, so that it can easily be bent over and placed around the main body 10. In FIG. 4, the slit region can be seen on the right side. The fastening ring 20 is preferably made of metal, For example, a steel made. It is particularly preferably produced as a one-piece stamped / bent part. Alternatively, the mounting ring 20 made of a resilient material, for. Be made of spring steel. As a result, a non-destructive disassembly of the fastening ring 20 can be realized when the base body 10 is removed, since the projections 24 spring back again into the starting position.

Fig. 5 shows the diaphragm mounting inserted into the pot hole 2 of the diaphragm 1 in a sectional view. The cut is in this case made parallel to the surface of the panel 1 in approximately the middle fleas of the Topflocheinsatzes.

When inserting the Topflocheinsatzes in the pot hole 2 initially protrude only the issued spring tongues 21 beyond the radius of the upper and lower plate 11,13. The spring tongues 21 press when inserting the Topflocheinsatzes in the pot hole 2 against the circumferential side surface and thus fix the mounting ring 20 by force closure. In Fig. 5 it can be seen that the projections 24, which are displayed in the region of the steps 23, with their tip are still within the radius of the pot hole 2 and thus not touch the material of the diaphragm 1.

Fig. 6 now illustrates the assembly process of the Topflocheinsatzes. For final fastening of the pot-hole insert in the pot-hole 2, the basic body 10 is rotated relative to the fixing ring 20. For this purpose, the base body 10 in the upper plate on the polygonal opening 12. In this case, a suitable polygonal key is used, with which a torque can be exerted on the base body 10. The polygonal key is preferably formed hollow inside so that it can be inserted over the pin 30.

By the spring tongues 21 of the mounting ring 20 is pre-fixed in the Topflochbohrung2, so that a rotation of the mounting ring 20 in the panel 1 is unbtened. Rotation of the base body 10 with the polygonal key therefore leads to a relative rotational movement of the base body 10 relative to the fastening ring 20. By this relative movement of the two elements to each other, the run-up slope 15 of the body runs up the slope 22 of the mounting ring 20, whereby the to the step 23 of Befestigungs¬ around 20 adjacent area is pushed outward. In this area, the projection 24 is arranged, which is consequently also pressed outwards and thus into the material of the panel 1. Such a projected into the outside of the diaphragm 1 projection 24 can be seen after completion of the rotation of the base body 10 relative to the mounting ring 20 in Fig. 6. The pot hole insert is thus firmly anchored by positive engagement in the Topflochbohrung 2. The guide lug 25 is in the guide groove 17 by the special shape of the guide groove 17, in this case a prism, axially positive fit gesi¬chert. To prevent over-rotation of the main body 10 in the mounting ring, 17 may be provided at the end of the guide groove 17, an additional stop. Overshooting of the body 10 could be detrimental in that the projections 24 would not be pushed outward in the event and could become detached from the material of the diaphragm 1.

Finally, FIG. 7 once again shows the diaphragm fixing element fixed in this way in the panel 1 in a detailed representation.

In the following described Fig. 8 and 9, a further Ausführungs¬ example of an aperture fastener is shown. Identical or gleich¬ acting elements are provided with the same reference numerals as in the embodiment shown in FIGS. 1 to 7.

8a firstly shows a perspective view of the diaphragm attachment element of the second exemplary embodiment. As in the first embodiment, a pot-hole insert with a base body 10 and a fastening ring 20 is provided. From the main body 10 in turn protrudes a pin 30, which serves to connect a panel with a drawer. Reference is made in this regard to the embodiment for the first Ausführungsbei¬spiel. In contrast to the first exemplary embodiment, in the present example the fastening ring 20 is not pre-mounted on the main body 10. The base body 10 is also not used together with the Befesti¬ gungsring 20 in an introduced into the aperture pot hole, but the mounting ring 20 is vor¬montiert in such a Topflochbohrung. This is described in more detail in connection with FIG. 9.

The main body 10 in turn has an upper plate 11, with a zentra¬len polygonal opening 12, which in turn here is designed as a hexagon and indie a corresponding polygonal key can be used to exert a torque on the main body 10.

From its basic form forth, the base body 10 is again cylindrically shaped, but unlike the first embodiment, it has no protruding lower plate. Below the upper plate 11, a (screw) thread 18 is formed on the main body 10.

With the thread 18 of the base body 10 is ein¬geschraubt in the mounting ring 20; For this purpose, the fastening ring 20 on Gewindeabschnit¬te 26. In the present case, distributed around the circumference of the fastening ring 20, three such threaded sections 26 are provided. In the region of these threaded sections 26, the fastening ring 20 has a height which corresponds essentially to the depth of the pot hole and also to the height of the main body 10.

In the regions lying between the threaded portions 26 of the Be¬festigungsring 20 is formed only about half as high. The lower portion is bent outwardly in a central portion between the threaded portions 26 respectively to projections 24. Between the projections 24 and the threaded portions 26, the lower portion of the fixing ring 20 remains free. Although the projections 24 are bent outward, however, in the area of the projections 24, the wall of the fastening ring 20 is twisted about an axis such that the tips of the projections 24 do not protrude beyond the outer radius of the fastening ring 20.

FIG. 8b likewise shows the panel fixing element of FIG. 8a in an isometric view, in which case the basic body 10 is screwed into the fastening ring 20. In this state, the projections 24 are pressed to the outside, whereby they protrude well beyond the other radius of the mounting ring20. This disengagement of the fastening ring 20 and the exhibiting of the claw-like projections 24 is exploited to fix the Blen¬denbefestigungselements in a panel.

The mounting operation of the diaphragm fixing member is illustrated with reference to FIG. 9 in five partial images. As already mentioned, in this second exemplary embodiment, the fastening ring 20 is preassembled in a pot hole.

For this purpose, a mounting auxiliary tool, hereinafter called Einschlagwerkzeug 40, used.

The wrapping tool 40 consists of a guide cylinder 41, which at ei¬nem lower end provides a cylindrical receptacle 42 on which a mounting ring 20 can be plugged. Above the cylindrical receptacle 42, a ring is formed with a larger diameter, the lower side surface is a support surface 43 for the wrapping tool 40. Central in the guide cylinder 41 is a wrapping mandrel 44 is guided over a in FIG. 9c visible cone 45 on three slides 46th acts. These slides 46 are inserted in radially outwardly extending grooves of the receptacle 42. At the end of the slide 46 are the projections 24 of the Befestigungs¬ ring 20 at.

As can be seen in FIG. 9b, the impacting tool 40 is placed on a cup hole bore 2 of a diaphragm with the attachment ring 20 so that the cylindrical receptacle 42 with the attachment ring 20 dips into the well bore 2 and the impact tool 40 with the support surface 43 flat on the Top of the panel 1 rests.

FIG. 9 c shows this situation in a sectional view, in which the sectional plane runs perpendicular to the surface of the panel 1 through the middle of the pot hole 2. FIG. 9d shows the situation in a sectional view, in which the cut parallel to the surface of the panel 1 is carried out through the pot hole 2.

9c also clarifies the function of the impact tool 40. The impact mandrel 44 rests with its cone 45 on likewise bevelled surfaces of the slide 46. To fix the fastening ring 20 in the Topfloch¬ bore 2 of the wrapping mandrel 44 is hammered in the direction of the panel 1, for example by means of a hammer. The movement of the turning mandrel 44 on the aperture 1 leads to the cone by the movement of the slide 46 in the radial direction to the outside. As a result of this movement, the fastening ring 20 is pressed outward in the region of the projections 24, and the projections 24 are pushed into the material of the panel 1. The impact tool 40 is subsequently removed from the pot hole 2.

Fig. 9e shows the result of the assembly process in a sectional view similar to Fig. 9d. It can be seen how the claw-like projections 24 are pressed into the Materi¬ al the panel 1, whereby the mounting ring 20 is fixed positively in the Topflochbohrung 2. For final assembly of the diaphragm fastening element, the main body 10 is now screwed with its thread 18 into the threaded sections 26 and thus into the fastening ring 20. This then again results in the final assembled state shown in FIG.

In the two exemplary embodiments described above, the pot-hole insert consisting of basic body 10 and fastening ring 20 was used to fix the pin 30 in a panel for diaphragm attachment. The Ein¬satzmöglichkeiten of the described Topflocheinsatzes are not limited to this application of an aperture fastener. Rather, the Topflocheinsatz can be used for all fittings that are fixed by means of a Topflochbohrung on a piece of furniture.

FIGS. 10 a and b each show a so-called cup hinge 50, which is usually used in conjunction with furniture doors, in particular cabinet doors, or furniture flaps. In both cases, the Topfscharnier50 a base member 51 which can be attached to a base plate 52 which is mountable to a furniture carcass. The attachment of Grundele¬ments 51 to the base plate 52 can be done for example via screws or Rastmittel, wherein a position and / or angle adjuster 53 may be provided. Articulated arms 54 connect the base element 51 with a pot hole insert according to the invention. In the illustrated Topfscharnie-ren 50 articulated arms 54 of the respective hinge in the main body 10 are deflected.

The cup hinge 50 is based in the embodiment of FIG. 10a on the Topflocheinsatz shown in Figs. 1 to 7, in which the base body 10 is used together with the mounting ring 20 in a Topflochbohrung. The embodiment of FIG. 10b is based on the well insert described in FIGS. 8 and 9, in which the mounting ring 20 is preassembled and the body 10 is then screwed into the preassembled mounting ring 20.

Both cup hinges 50 can be attached to the pot hole insert on a furniture office door. For this purpose, a tool holder may be formed in the base body 10 in order to rotate the base body 10 relative to the fastening ring 20 (in the embodiment of FIG. 10a) or to screw the base body 10 into the preassembled fastening ring 20 (in the embodiment of FIG. 10b). , Alternatively it can be provided to apply the torque for turning or screwing in via the articulated arms 54 by using the base element 51 as a lever.

After setting the Topflocheinsatzes in the furniture door or flap this can then be mounted by attaching the base member 51 on the base plate 53 and the furniture body.

List of Bezuaszeichen 1 Aperture 2 Topflochbohrung 10 base of the Topflocheinsatzes 11 upper plate 12 polygonal opening 13 lower plate 14 middle waisted area 15 starting slope 16 step 17 guide groove 18 thread 20 mounting ring 21 spring tongue 22 bevel 23 step 24 projection 25 guide nose 26 threaded portion 30 pin 31 shaft 32 head 40 Impact tool 41 Guide cylinder 42 Holder 43 Platen 44 Impact mandrel 45 Cone 46 Slider 50 Concealed hinge 51 Base element 52 Base plate 53 Position and / or angle adjuster 54 Articulated arm

Claims (13)

A pot-hole insert for insertion into a pot-shaped bore (2) of a furniture part, comprising a cup-shaped main body (10), characterized gekenn¬zeichnet that the base body (10) at least partially surrounding mounting ring (20) is provided, the outwardly facing Projections (24) which are herausdrückbar outwardly for fixing the Topflocheinsatzes in the pot hole (2). 2. A pot-hole insert according to claim 1, wherein the projections (24) are pressed by a rotational movement of the base body (10) relative to the fastening ring (20) to the outside. 3. Topflocheinsatz according to claim 2, wherein the base body (10) Anlauf¬ bevels (15) and the mounting ring (20) slopes (22), the interaction such that the fastening ring (20) in the region of the projections (24) is deformed. 4. Topflocheinsatz according to claim 2 or 3, wherein the base body (10) between an upper plate (11) and a lower plate (13) has a mitt¬leren, waisted portion (14), wherein the fastening ring (20) around the middle , waisted portion (14) around and between the upper Plat¬te (11) and the lower plate (13) is arranged. 5. pot-hole insert according to claim 3 or 4, wherein the base body (10) has at least one guide groove (17) along at least a portion of a circumference, which cooperates with a guide nose (25) of the Befesti¬gungsrings (20). 6. Topflocheinsatz according to claim 1, wherein the base body (10) has a zy¬lindrische basic shape and circumferentially at least partially provided with a thread (18). 7. pot hole insert according to claim 6, wherein the fastening ring (20) min¬destens two, preferably at least three threaded portions (26) to screw the main body (10) in the mounting ring (20) zukönnen. 8. pot-hole insert according to claim 7, wherein the projections (24) between the threaded portions (26) are positioned, wherein the mounting ring (20) in an unassembled state in the region of the projections (24) is twisted around a tangential axis that Extern¬ wise projections (24) do not protrude beyond the radius of the Befesti¬ gungsring (20) in the region of the threaded portion cuts (26). 9. Topflocheinsatz according to one of claims 1 to 8, wherein the Befesti¬ gungsring (20) is made of metal in a stamping / bending process. 10. Topflocheinsatz according to any one of claims 1 to 9, wherein the Grund¬ body (10) is a one- or multi-part plastic injection molded part. 11. Topflocheinsatz according to one of claims 1 to 10, wherein in the Grund¬ body (10) a tool holder is formed, in particular in the form of a polygonal opening (12). 12. Aperture fixing element, comprising a pin (30) for fastening a panel (1) on a drawer, characterized in that the panel fastening element has a pot-hole insert according to one of claims 1 to 11. A cup hinge (50), in particular for fastening a furniture door or furniture flap to a furniture carcass, characterized in that the plug hinge (50) has a pot hole insert according to one of claims 1 to 11.