AT16469U1 - Fastening element and method for fixing such a fastener - Google Patents

Abstract

In a fastening element for fixing in a hole, it is provided that a shaft (2) of the fastening element (1) is formed with expansion bodies (3) projecting from the shaft (2) and pivotably fixed thereto, that each expansion body (3) is provided with a inclined to a shaft longitudinal axis extending projecting edge (7) is formed on its side facing away from a connection with the shaft (2) surface, that by the protruding edges of the spreader (3) defined outer dimension of the fastener (1) slightly larger than the inner diameter of the Hole (5) is selected, and that the fastening element (1) at one end with a head (4) with a profiling in the head (4) for actuation by a tool after insertion of the fastener (1) in its longitudinal direction in the Hole (5) for rotating the fastener (1) in the hole (5) for engagement of the projecting edges (7) of the spreader (3) in egg ne inner surface of the hole (5) is formed.

Description

The present invention relates to a fastener for fixing in a substantially circular inner contour having hole and a method for fixing a fastener in a substantially circular inner contour having hole.

Fasteners for fixing different objects, wherein such a fastener is either introduced into a previously made hole and anchored in this or by the fastener itself a hole is made, are known in different embodiments. For example, nails or similar pin-like fasteners are known, which can be taken directly into a material having a correspondingly low hardness material or for which a hole is prepared with respect to the outer diameter of such a nail reduced inner diameter, in which a nail inserted as a fastener or can be taken. A disadvantage of using a nail is, in particular, the fact that a nail or such a substantially pin-shaped fastening element can be easily removed again by being acted upon counter to the insertion or insertion direction.

For a particular secured against a simple pulling out of such a fastener fixing a fastener screws in different embodiments are known, which are usually screwed into a prepared, essentially a circular inner contour having hole. Depending on the purpose and the materials used is either by the screw in the correspondingly smaller inner dimensions having hole essentially automatically cut a thread or it is or are matched to each other, both the screw and the hole with a corresponding internal thread and external thread for a Screwing and thus fixing the fastener are provided. Moreover, it is known, similar to a nail without preparatory production of a hole, for example, screw a screw in a correspondingly soft or low hardness exhibiting material.

A use or mounting using fasteners designed as screws is labor-intensive and expensive in many cases and is also difficult, especially in poorly accessible areas. Furthermore, a complicated and tedious fitting of such fasteners into corresponding holes is often complicated and time-consuming when using helical fasteners. It must further be taken care of screwing, especially when providing matched inner and outer threads, usually on a precise insertion of the fasteners in the provided with an internal thread hole, so as not, for example, by a tilting of the fastener when inserted into such a hole at least To damage portions of the existing thread, so that, if necessary, the use of such a fastener is no longer possible.

The present invention therefore aims to avoid or reduce the above-mentioned disadvantages of known fasteners, and in particular aims to provide a fastener for fixing in a substantially circular inner contour hole and a method for fixing such To provide fastener available, with which in a simpler and time-saving manner, a reliable determination of such a fastener is achieved.

To solve these objects, a fastener of the type mentioned is essentially characterized in that the fastener is formed with a shaft having a plurality of projecting from the shaft on the shaft surface and pivotally mounted on this Spreizkörpern that each spreader with a inclined to a shaft longitudinal axis extending projecting edge at its from a connection with

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Patent Office formed the surface facing away from the shaft, which defines an outer region of the respective expansion body, that defined by the protruding edges of the spreader outer dimension of the fastener along the shaft located in out of the hole position slightly larger than the inner diameter of the hole for receiving and fixing the Fastener is selected, and that the fastening element is formed at one end with a head which remains in a determination of the fastener in the hole substantially outside the hole, wherein a recess or profiling in the head for actuation by a tool or actuator after an at least partial insertion of the fastener in its longitudinal direction into the hole to at least partially twist the fastener in the hole for engagement of the projecting edges of the spreader in a Innenob erfläche the hole is provided. Characterized in that the fastening element according to the invention is formed with a shank and with a plurality of projecting from the shaft and pivotally mounted on this Spreizkörpern succeeds in a simple way, introduction of the fastener according to the invention in the hole by a simple insertion of the shank of the fastener in the hole , where appropriate, the insertion by a beating stress similar to the impact of a nail can be made according to simple and time-saving or at least supported. The expansion element projecting from the fastening element according to the invention, the outer dimension of which is selected to be slightly larger than the inner diameter of the hole in the hole located outside the hole, thus advantageously results in an at least provisional or long-term insertion of the shaft of the fastening element over a majority of the length of the shaft . temporary anchoring and fixing of the fastening element in the hole by abutment of the outer surfaces of the individual expansion body on the inner surface of the hole, which is provided for receiving and fixing the fastening element. Moreover, the fastener according to the invention has a head similar to a screw on the end remaining outside the hole, wherein a recess or profiling in the head for actuation by a tool or actuating element, in particular after insertion of the shaft into the hole, as above has been described. Similar to a screwing action, by using such a tool, by at least partially twisting the fastener in the hole about the longitudinal axis of the shaft, engaging the edges projecting from the outer surfaces of the spreader and extending obliquely to the longitudinal axis of the shaft into the inner surface of the hole and thereby one safe and reliable fixing of the fastener according to the invention similar to a screwing a known screw in the hole. The fastener according to the invention thus enables a simple and reliable combination of use or use operations of a nail formed as a fastener, whereby a simple insertion or wrapping operation is also possible to possibly hard to reach places with a fastening operation of a secure fixing similar to a screw by a at least partially twisting and thus screwing the protruding from the spreader edges in the inner surface of the prepared hole. It can thus provide a fastener available, which is used in a simple and particularly rapid manner by avoiding a complicated screwing over an optionally long length of the shaft of the fastener in the hole, said by the final rotational movement of the fastener by an intervention of the protruding Edges of the expansion body of the fastener in the inner surface of the hole a correspondingly reliable anchoring similar to a screw connection can be achieved.

For a distribution of optionally acting on the fastener in particular with regard to a withdrawal of the fastener from the hole forces is proposed according to a preferred embodiment that the shaft with a plurality of circumferentially and / or in the longitudinal direction of the shaft arranged spreading bodies is trained. By such a distribution of a plurality of expansion bodies in the circumferential direction and / or in the longitudinal direction of the shaft can be on the Befestigungsi2 / 10

AT16 469U1 2019-10-15 Austrian

Patentamt supply element corresponding forces distributed over the length and circumference of the shaft of the fastener and bring about correspondingly larger areas in the material in which the hole for receiving and fixing the fastener is formed.

For a simple production of the fastener according to the invention is proposed according to a further preferred embodiment that the shaft is formed on substantially opposite each other in the longitudinal direction of the shaft side surfaces each with a plurality along the longitudinal extension of the shaft arranged expansion bodies, such a training also a Homogenization of forces acting on the fastener forces allows. In this context, moreover, it is proposed that the shank is formed with two substantially mutually parallel substantially planar boundary surfaces, on each of which a plurality of expansion bodies along the longitudinal extension of the shaft is arranged, as corresponds to a further preferred embodiment of the fastener according to the invention ,

For a particularly simple insertion of the fastener into the hole by an introductory insertion or wrapping operation of the fastener in particular over much of the longitudinal extension of the shaft and in particular to achieve at least temporary or temporary anchoring of the fastener in the hole is in accordance with a Further preferred embodiment proposed that each spreader is formed by an eccentric, which is connected via a bending connection with the shaft at a position which corresponds substantially to a particular central position of the projecting edge of each spreader on the facing to the inner surface of the hole outer surface thereof ,

Such reliable at least provisional determination in a plugging or general introduction of the fastener according to the invention in the hole is further supported by the fact that the dimension of the defined by the edges of the spreader outer dimension before insertion into the hole by at least 1%, preferably at least 3% greater than the inner dimension of the hole is selected, as corresponds to a further preferred embodiment of the fastener according to the invention.

For a reliable fastening element of the invention similar to a screwing by engaging the projecting from the outer surface of the spreader edges in the inner surface of the prepared hole is proposed according to a further preferred embodiment that the inclination of the protruding edge of an expansion body to the longitudinal axis of the shaft is selected in a range of 2 to 25 °, in particular 7 to 16 °.

As mentioned above, by the on the outer surface of the spreader respectively provided and obliquely to the longitudinal axis of the shaft of the fastener extending edges by a twisting movement of the fastener after insertion of the shaft into the hole a screw similar to a screw with a self-tapping thread be provided or be.

As also already mentioned, however, in many cases, both designed as a screw fastener and a corresponding receiving hole with a mutually matched inner and outer threads are formed. In providing a hole formed with an internal thread for fixing a fastening element according to the invention can be dispensed with in the fastener according to the invention to a correspondingly complex training of extending substantially over the entire length of the shaft of the fastener external thread, in this context according to a further preferred embodiment it is proposed that in an internally threaded hole for receiving the fastener, the inner dimension of the hole through the inside width of the thread crests

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Patent office is defined, wherein the defined by the protruding edges of the spreader outer diameter of the fastener is selected substantially corresponding to the diameter at the thread root of the internal thread. In such a configuration, after insertion of the fastening element according to the invention into the hole provided with an internal thread, the edges running obliquely to the longitudinal axis of the shaft engage in the respective threads on the outer surfaces of the expansion elements, so that they are again deformed by a twisting movement of the fastening element a portion of a complete revolution results in a determination of the spreader or its edges in the threads in the sense of a threaded connection. In such a case, for a reliable fixing over substantially the entire length of the shaft, both the inclination or inclination of the edges of the spreader and their spacing are adjusted to dimensions or general parameters of the internal thread of the hole for receiving or fixing the fastening element adapted to it.

In particular, to achieve a corresponding flexibility of the determination of the expansion body on the shaft is provided that the fastening element is made of a plastic material, as corresponds to a further preferred embodiment of the fastener according to the invention.

Furthermore, it is preferably provided according to the invention that a hardness of the plastic material of the fastener is chosen greater than the hardness of the material in a determination in a provided with a smooth surface hole, in which the hole is formed for a determination of the fastener, which is in turn, in particular a determination of the fastener according to the invention can be achieved similar to a screw with a self-tapping thread.

To solve the above-mentioned objects, moreover, a method of the type mentioned above is characterized essentially by the following steps:

Providing the fastener with a shank having a plurality of expanding bodies projecting from the shank on the shank surface and pivotally fixed to the shank; forming each expanding body with a projecting edge inclined to a shank longitudinal axis at its connection with the surface facing away from the shaft, which defines an outer region of the respective expansion body, forming the outer dimension of the fastening element along the shaft defined by the protruding edges of the expansion elements in a position located outside the hole slightly larger than the inner diameter of the hole for receiving and Fixing the fastening element, - inserting the fastening element into the hole over at least a portion of the longitudinal extent of the shaft of the fastening element, and - fixing the fastening element in the hole by an at least partial Ver rotating the fastener in the hole by engaging the protruding edges of the spreader in an inner surface of the hole.

As already mentioned above, can be with the inventive method for fixing a fastener, the advantages of rapid fixing similar to using a nail as a fastener with the advantages of a secure anchorage using a fastener designed as a screw by a plug-in operation of the shaft with a provisional or temporary anchoring and a subsequent screw by twisting the fastener to achieve at least a portion of a complete revolution.

The invention will be explained in more detail with reference to embodiments schematically illustrated in the accompanying drawings. In this show:

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Patent Office [0024] FIG. 1 a perspective schematic view of a fastening element according to the invention;

FIG. 2 is a side view of the fastener of FIG. 1; FIG.

Fig. 3 is a longitudinal section through the fastener of Figures 1 and 2 in a fixed or arranged in a hole state.

Fig. 4 is a side view of the fastener;

5 shows a section along the line V-V through the fastening element of FIG. 4, [0029] FIG. 6 shows in an enlarged scale a detailed view according to FIG. 5 of a fixing of an expansion body to a shaft of the fastening element;

Fig. 7 in a similar to Figure 3 representation of a modified embodiment of a fastener according to the invention; and [0031] FIG. 8 shows, in a representation similar to FIG. 2, a further modified embodiment of a fastening element according to the invention.

In Fig. 1 to 6 is generally designated 1 a fastener having a plurality of spreader bodies 3 on a shaft 2, as will be described in detail below.

The fastener 1 is also provided with a head 4, which, as can be seen in particular from Fig. 3, remains in a determination in a particular, in particular, a substantially circular inner contour exhibiting hole 5 outside of the hole 5. The head 4 is also provided with recesses or generally a profiling 6, in which a not-shown tool or actuator, such as a screwdriver can be introduced, whereby after insertion of the fastener 1 and in particular of the shaft 2 in a hole 5 in the direction of the longitudinal extent of the shaft 2 according to the arrow 31, as shown in Fig. 3, by a twisting movement corresponding to the arrow 32 about the longitudinal axis of the shaft 2, a fixing of the fastener 1 in the hole 5 can be achieved.

As can be seen in particular from Fig. 2, 4 and 5, the spreader 3 are each provided on their outer surfaces with an edge 7, wherein each of these edges 7 obliquely to a in Fig. 4 with 8 indicated longitudinal axis of the shaft 2 runs.

An angle a, which is also indicated in Fig. 4, between the longitudinal axis 8 of the shaft 2 and the oblique edge 7 of each expansion body 3 is in particular in adaptation for the materials which for the fastener 1 and in particular the shaft. 2 the same are selected for the object in which the hole 5 is formed, in a range of 2 to 25 °, in particular selected from 7 to 16 °.

6, the determination of an expansion body 3 is shown in detail on the shaft 2, from which it is apparent that the expansion body 3 are each formed by an eccentric, which via a flexible connection 9 with the shaft 2 are coupled. About the comparatively small dimensions having compound 9, the spreader 3 can be slightly pivoted in an insertion of the fastener 1 in the direction of the longitudinal axis of the shaft 2, whereby the achievable by inserting temporary or temporary anchoring is possible. To achieve a screw-like effect by twisting the fastener 1 after insertion thereof by the inclined or oblique edges of the eccentric or expansion body 3, the position of the flexible or bending connection 9 of the spreader 3 is substantially corresponding to the position of the oblique or inclined edge 7, in particular selected the substantially central region thereof. As a result, in the case of a twisting movement of the fastening element 1 corresponding to at least one partial area of a complete revolution, it is possible to introduce a force sufficient to achieve an effect similar to a self-tapping thread through the oblique thread

AT16 469U1 2019-10-15 Austrian

Patent Office achieve running edges 7.

To achieve a corresponding flexibility in particular the spreader 3 is also provided that the material in particular of the shaft 2 and the spreader 3 of the fastener 1 is formed of a plastic material.

As already mentioned several times, can be achieved with the fastener 1, an effect similar to a self-tapping thread or a self-tapping screw. When using a plastic material for the fastener 1 to achieve such an effect of a self-tapping thread in this case the hardness of the material of the fastener 1 or in particular the material of the spreader 3 correspondingly greater than to choose the hardness of the material in which the hole 5 for receiving and fixing the fastener 1 is provided.

In the modified embodiment shown in Fig. 7, a fastening element 11 is provided, which is similar to the fastening element according to the above embodiment with a shaft 12 and a plurality of distributed on the shaft 12 arranged Spreizkörpern 13 is provided. The fastener 11 in turn has a head 14 for actuation by a tool not shown in detail via a profiling or recess 16 in the head 14.

Notwithstanding the preceding embodiment, the hole designated 15 is also provided with a schematically indicated by 18 internal thread. A fixing operation of the fastening element 11 is similar to the previous embodiment by inserting the fastener 11 substantially over a majority of the longitudinal extension of the shaft 12 in the provided with the internal thread 18 hole 15 corresponding to the arrow 31, which in turn by a twisting movement of the fastener 11th about the longitudinal axis of the shaft 12 according to the arrow 32 a determination on the spreader 13 is effected in that on the outer surface thereof provided edges 17, which extend obliquely to the longitudinal axis of the shaft 12 as in the previous embodiment, engage in the threads of the internal thread 18 and allow such a screw-like fixing of the fastener 11.

By appropriate choice of both the inclination or inclination of the edges 17 of the spreader 13 and the respective mutual distance in adaptation to the dimensions or parameters of the internal thread 18 can be through the fastener 11 in turn by a simple insertion and subsequent twisting or Screwing to achieve only a partial area, for example, a complete rotation of the fastener 11 about the longitudinal axis of the shaft 12 a secure determination thereof.

In the further embodiment shown schematically in Fig. 8 is provided in a fastener 21 that distributed on a shaft 22 in turn in the longitudinal direction or spaced a plurality of expansion body 23 are provided. Notwithstanding the preceding embodiments, in which a plurality of expansion bodies 3 and 13 are respectively provided on the shaft 2 and 12 respectively on substantially opposite side surfaces, in the embodiment according to FIG. 8 expansion bodies 23 are also provided on additional surfaces of the shaft 22 in the circumferential direction distributed provided. Such a shaft 22 may for example have a substantially square contour, so that, for example, distributed on many surfaces both in the longitudinal direction and in the circumferential direction corresponding expansion body 23 are provided.

The expansion body 23 in the embodiment of FIG. 8 are again formed with edges 27 similar to the preceding embodiments.

Claims (11)

1. fixing element for fixing in a substantially circular inner contour having hole, characterized in that the fastening element (1, 11, 21) is formed with a shaft (2, 12, 22) having a plurality of spreading bodies (3, 13, 23) projecting from the shaft (2, 12, 22) on the shaft surface and being pivotably attached thereto, that each expansion body ( 3, 13, 23) is formed with a protruding edge (7, 17, 27) running at an angle to a shaft longitudinal axis on its surface facing away from a connection with the shaft (2, 12, 22), which has an outer region of the respective expansion body (FIG. 3, 13, 23) defines that the outer dimension of the fastening element (1, 11, 21) defined by the projecting edges (7, 17, 27) of the expansion bodies (3, 13, 23) is guided along the shaft (2, 12, 22 ) is located in outside of the hole (5, 15) located position slightly larger than the inner diameter of the hole (5, 15) for receiving and fixing the fastener (1, 11, 21), and that the fastening element (1, 11, 21 ) is formed at one end with a head (4, 14, 24), which at a fixing of the fastening element (1, 11, 21) in the hole (5, 15) remains substantially outside the hole (5, 15), wherein a recess or profiling (6, 16) in the head (4, 14, 24 ) for actuation by a tool or actuating element after at least partial insertion of the fastening element (1, 11, 21) in its longitudinal direction into the hole (5, 15) to at least partially twist the fastening element (1, 11, 21) in the hole (5, 15) for engagement of the projecting edges (7, 17, 27) of the expansion body (3, 13, 23) in an inner surface of the hole (5, 15) is provided. 2. Fastening element according to claim 1, characterized in that the shaft (2, 12, 22) with a plurality of in the circumferential direction and / or in the longitudinal direction of the shaft (2, 12, 22) distributed spreading bodies (3, 13, 23) is formed. 3. Fastening element according to claim 1 or 2, characterized in that the shaft (2, 12, 22) at substantially each other in the longitudinal direction of the shaft (2, 12, 22) opposite side surfaces each with a plurality along the longitudinal extension of the shaft (2, 12, 22) arranged Spreizkörpern (3, 13, 23) is formed. 4. Fastening element according to claim 1, 2 or 3, characterized in that the shaft (2, 12) is formed with two substantially mutually parallel substantially planar boundary surfaces, on each of which a plurality of Spreizkörpern (3, 13) along the Longitudinal extension of the shaft (2, 12) is arranged. 5. Fastening element according to one of claims 1 to 4, characterized in that each expansion body (3, 13, 23) is formed by an eccentric, which is connected via a bending connection with the shaft (2, 12, 22) at a position, which essentially corresponds to a particularly central position of the projecting edge (7, 17, 27) of each expansion body (3, 13, 23) on the outer surface facing the inner surface of the hole (5, 15). 6. Fastening element according to one of claims 1 to 5, characterized in that the dimension of the by the edges (7, 17, 27) of the expansion body (3, 13, 23) defined outer dimension before insertion into the hole (5, 15) at least 1%, preferably at least 3% greater than the inner dimension of the hole (5, 15) is selected. 10.7 AT16 469U1 2019-10-15 Austrian Patent Office (13) defined outer diameter of the fastening element (11) is selected substantially corresponding to the diameter at the root of the thread (18). 7. Fastening element according to one of claims 1 to 6, characterized in that the inclination of the projecting edge (7, 17, 27) of an expansion body (3, 13, 23) to the longitudinal axis of the shaft (2, 12, 22) in one area is selected from 2 to 25 °, in particular 7 to 16 °. 8. Fastening element according to one of claims 1 to 7, characterized in that at an internal thread (18) provided with a hole (15) for receiving the fastener (11), the inner dimension of the hole (15) defined by the inside diameter of the thread crests is, wherein by the projecting edges (17) of the spreader 9. Fastening element according to one of claims 1 to 8, characterized in that the fastening element (1, 11, 21) is made of a plastic material. 10. Fastening element according to claim 9, characterized in that a hardness of the plastic material of the fastening element (1, 11, 21) in a determination in a provided with a smooth surface hole (5, 15) is greater than the hardness of the material is selected in in which the hole (5, 15) is designed for fixing the fastening element (1, 11, 21). 11. A method for fixing a fastener in a substantially circular inner contour having hole, characterized by the following steps: Providing the fastening element (1, 11, 21) with a shaft (2, 12, 22) having a plurality of expansion bodies (3, 13) projecting from the shaft (2, 12, 22) on the shaft surface and being pivotably fixed to the shaft , 23), Forming each expansion body (3, 13, 23) with a projecting edge (7, 17, 27) inclined towards a shaft longitudinal axis on its surface facing away from a connection with the shaft (2, 12, 22), which forms an outer region of the respective expansion body (3, 13, 23) defines - Forming of the outer edges of the fastening element (1, 11, 21) defined by the projecting edges (7, 17, 27) of the expansion body (3, 13, 23) along the shaft (2, 12, 22) in the outside of the hole (5 , 15) located slightly larger than the inner diameter of the hole (5, 15) for receiving and fixing the fastener (1, 11, 21), - Inserting the fastener (1, 11, 21) in the hole (5, 15) over at least a portion of the longitudinal extension of the shaft (2, 12, 22) of the fastener (1, 11,21), and - Fixing the fastener (1, 11, 21) in the hole (5, 15) by an at least partial rotation of the fastener (1, 11, 21) in the hole by engagement of the projecting edges of the expansion body (3, 13, 23 ) in an inner surface of the hole (5, 15). For this 2 sheets of drawings