DE102015107383A1 - Fastening device and its use - Google Patents

Abstract

In order to always secure mounting without damage, in particular the surface of a bottom plate (6) is possible, a fastening device (5) for fixing the bottom plate (6) on the one hand on the edge (71) of a carrier (7) on the other proposed, with a rotary drive (51) on the one side and with an associated fixing part (52) for engaging behind the carrier (7) via its edge (71) on the other side, - wherein the rotary drive (51) and the fixing part (52) via a thread (53) are connected to each other and - wherein the fixing part (52) is designed as a bolt with the thread (53) on one side and a via a constriction (54) in a projection (55) merging region on the other side.

Description

Technical area

The present invention relates to a generic, that is, according to the preamble of claim 1 trained fastening device for fixing a bottom plate on the one hand on the edge of a carrier on the other hand, with a rotary drive on one side and with an associated fixing member for engaging behind the carrier on the edge on the other side.

The present invention further relates to a composite of a support and a base plate arranged on the carrier, which is provided with at least one adapted to a generic, that is according to the preamble of claim 1 adapted mounting hole, the bottom plate and the carrier on the in the hole used fastening device are interconnected.

State of the art

Such fastening devices are used in a variety of embodiments (see, for example, the document DE 20 2013 103 484 U1 ) and have proven themselves; However, the fastening device has a screw head as a rotary drive and a coil spring as a fixing part, the lowermost turn engages behind the edge of the carrier after a rotation.

Apart from the elaborate production, the connection is not always sufficiently strong and can scratch the surface of the bottom plate.

DESCRIPTION OF THE INVENTION: Problem, Solution, Advantages

Based on the disadvantages and inadequacies set out above and in appreciation of the outlined prior art, the present invention has the object, a generic fastening device according to the preamble of claim 1 and a generic composite of a support and a base plate arranged on the support, with at least one adapted to the fastening device bore is provided, wherein the bottom plate and the carrier are connected to each other via the fastening device inserted into the bore, so educate that always secure mounting without damage, especially the surface of the bottom plate is possible.

• – dass der Drehantrieb und das Fixierteil über ein Gewinde miteinander verbunden sind und
• – dass das Fixierteil als Bolzen mit dem Gewinde auf der einen Seite und mit einem über eine Einschnürung in einen, nämlich bei seiner Drehung zur Aufnahme des Randes des Trägers, Vorsprung übergehenden Bereich auf der anderen Seite ausgebildet ist.

This object is achieved in a generic, that is, according to the preamble of claim 1 fastening device according to the invention by their characterizing features, thus solved,

• - That the rotary drive and the fixing part are connected to one another via a thread and
• - That the fixing part is designed as a bolt with the thread on one side and with a via a constriction in one, namely during its rotation for receiving the edge of the carrier, projection transition region on the other side.

The fastening device is thus inserted into the bore. Upon actuation of the rotary drive this is first, in particular because of the higher torque at the beginning of the rotation, together with the fixing part rotated until its projection on the bore partially covering the edge of the bottom plate over deeper into the hole and thereby the constriction next to the side of the Rands and it while turning further to the plant while simultaneously reaching behind the edge passes through the projection.

Thereafter, the fixing member is held in this position, while the rotary drive is operated further and this approaching over the thread of the fixing member and thereby defines both the fastening part in the bore and the bottom plate to the carrier.

Advantageously, the rotary drive on an external thread and engages this in an adapted thereto internal thread of the bolt formed as a fixing part. By the thread a high biasing force can be achieved; As a result, a number of fastening devices can be saved with the same holding power.

Conveniently, the bolt is designed as a cylinder and includes its constriction in cross-section and relative to the cylinder axis a first predetermined central angle, the projection includes a comparatively larger second central angle, preferably the first central angle and the second central angle each have a common leg and from this have the same direction of rotation.

The fastening device is particularly simple if the constriction and / or the projection are enclosed by a plane or by two planes which are or are aligned transversely, in particular at right angles, to the cylinder axis.

In the case of the composite of the carrier according to the invention and the base plate arranged thereon and provided with at least one bore adapted to the fastening device, these and the carrier is connected to each other via the fastening device inserted into the bore, wherein the carrier partially covers with its edge the mouth region of each bore while leaving a passage opening through which protrudes the projection of the fixing in a simple and obvious manner after attachment of the fastening device and after rotation with the constriction in the area of the edge, the other side of the carrier engages behind.

In order to ensure a firm hold, the bore expediently on one side a countersink and the rotary drive expediently a cone adapted thereto.

Further advantageous embodiments and expedient developments of the present invention are characterized in the further claims.

Finally, the present invention relates to the use of a fastening device according to the above-described type for forming a composite of a carrier and a base plate arranged on the carrier in at least one bore provided in the base plate.

Brief description of the drawings

As already discussed above, there are various possibilities for embodying and developing the teaching of the present invention in an advantageous manner. For this purpose, reference is made on the one hand to the claim 1 and the claim 7 subordinate claims, on the other hand, further refinements, developments, features and advantages of the present invention will be explained below with reference to the drawing.

In this shows:

1 a fastening device according to the invention, in the inserted state and in schematic cross section;

2 the representation according to 1 without fastening device, in plan view and

3A to 3D the fastening device according to 1 , in various intermediate stages when screwing.

Same or similar embodiments, elements or features are in 1 to 3D provided with identical reference numerals. The dimensioning of the individual elements or features, in particular in relation to each other, is in 1 to 3D not necessarily true to scale.

Best way to carry out the present invention

In the 1 shown fastening device according to the invention 5 serves to define a base plate 6 on the one hand on the edge 71 a carrier 7 on the other hand 2 ), is with a rotary drive 51 on one side and with an associated fixation part 52 for grasping the carrier 7 over its edge 71 provided on the other side, with the rotary drive 51 and the fixing part 52 , which is designed as a bolt, via a thread 53 connected to each other, namely the rotary drive 51 an external thread 531 having, in an adapted internal thread 532 of the fixing part 52 intervenes.

The fixing part 52 in the form of the bolt is threaded 53 on one side and one about a constriction 54 into a lead 55 transition area formed on the other side.

Here, the bolt is cylindrical and closes its constriction 54 in cross section and relative to the cylinder axis, a first predeterminable central angle and the projection 55 a comparatively larger second central angle, both (the first central angle and the second central angle) each have a common leg and - starting from this - the same direction of rotation, wherein the constriction 54 and / or the lead 55 are / is enclosed by a plane or two planes, which is transversely, in particular at right angles, aligned with the cylinder axis or are.

To form a composite are the bottom plate 6 and the carrier 7 over in one in the bottom plate 6 provided hole 61 used fastening device 5 connected with each other. This is based on the sequence of successive snapshots in the form of 3A to 3D Intermediate positions shown.

The fastening device 5 So it gets into the hole 61 used.

When operating the rotary actuator 51 this is first, preferably because of the higher torque at the beginning of rotation with the fixing part 52 turned together until its projection 55 at the bore 61 partially covering edge 71 the bottom plate 7 deeper into the hole 61 and thereby the constriction 54 next to the side of the edge 71 arrives ( 3A ) because of the carrier 7 with his edge 71 the mouth area of each hole 61 while leaving a passage opening partially covered, then through the projection of the fixing after the attachment of the fastening device 5 protrudes.

During further rotation then the projection engages behind 55 increasingly the edge 71 ( 3B ).

This takes place until the fixing part with a positive fit with its constriction 54 from the edge 71 is prevented from further rotation ( 3C ).

After that, the fixing part 52 held in this position during the rotary drive 51 continues to be pressed and this while the thread 53 the fixing part 52 approaching and doing both the fastening part 5 in the hole 61 as well as the bottom plate 6 on the carrier 7 determines ( 3D ). For this purpose, it is useful if the bore 61 on one side a countersink 62 and the rotary drive 51 a cone adapted to it 56 having.

Advantageously, the fastening device 5 to form the composite of carriers 7 and bottom plate arranged thereon 6 in the at least one hole provided therein 61 used.

LIST OF REFERENCE NUMBERS

5

 fastening device

51

 rotary drive

52

 fixing

53

 thread

531

 external thread

532

 inner thread

54

 constriction

55

 head Start

56

 cone

6

 baseplate

61

 drilling

62

 countersink

7

 carrier

71

Edge of the carrier 7

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202013103484 U1 [0003]

Claims (10)

Fastening device ( 5 ) for fixing a base plate ( 6 ) on the one hand at the edge ( 71 ) of a carrier ( 7 ) On the other hand, with a rotary drive ( 51 ) on one side and with an associated fixing part ( 52 ) for engaging behind the carrier ( 7 ) over its edge ( 71 ) on the other side, characterized in that - the rotary drive ( 51 ) and the fixing part ( 52 ) via a thread ( 53 ) and that - that the fixing part ( 52 ) as a bolt with the thread ( 53 ) on one side and one over a constriction ( 54 ) into a lead ( 55 ) transition area is formed on the other side. Fastening device according to claim 1, characterized in that - the rotary drive ( 51 ) an external thread ( 531 ) and - that the external thread ( 531 ) in an adapted internal thread ( 532 ) of the fixing part ( 52 ) intervenes. Fastening device according to claim 1 or 2, characterized in that - the bolt is designed as a cylinder, - that its constriction ( 54 ) in cross-section and relative to the cylinder axis includes a first predetermined center angle and - that the projection ( 55 ) includes a comparatively larger second central angle. Fastening device according to claim 3, characterized in that the first central angle and the second central angle each have a common leg and from this same direction of rotation. Fastening device according to at least one of claims 1 to 4, characterized in that the constriction ( 54 ) and / or the lead ( 55 ) are enclosed by at most two levels, which are aligned transversely, in particular at right angles, to the bolt axis. Fastening device according to at least one of claims 1 to 5, characterized in that the thread ( 53 ) has a higher torque on the first threads than afterwards. Composite of a carrier ( 7 ) and one on the carrier ( 7 ) arranged floor plate ( 6 ) connected to at least one of a fastening device ( 5 ) according to at least one of claims 1 to 6 adapted bore ( 61 ), the bottom plate ( 6 ) and the carrier ( 7 ) over the hole ( 61 ) used fastening device ( 5 ) are interconnected. Composite according to claim 7, characterized in that the carrier ( 7 ) with its edge the mouth area of each hole ( 61 ) is partially covered leaving a passage opening through which the projection ( 55 ) of the fixing element ( 52 ) after attachment of the fastening device ( 5 protrudes and after a rotation with the constriction ( 54 ) in the area of the edge ( 71 ) the other side of the carrier ( 7 ) engages behind. Composite according to claim 7 or 8, characterized in that the bore ( 61 ) on one side a countersink ( 62 ) and the rotary drive ( 51 ) an adapted cone ( 56 ) having. Use of a fastening device ( 5 ) according to at least one of claims 1 to 6 for forming a composite from a carrier ( 7 ) and one on the carrier ( 7 ) arranged floor plate ( 6 ) in at least one in the bottom plate ( 6 ) provided bore ( 61 ).

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