Fastening device

Abstract

The invention relates to a fastening device (10) for fastening an object, such as a hose holder (12) or a pipe clamp, to a holding device (14) having a C-shaped profile (18), the C-shaped profile (18) having a T-shaped groove (20) which is open towards a slot (22), the slot (22) being delimited on mutually opposite sides by the free edge (24) of each outer wall (26) of the C-shaped profile (18), and the fastening device comprising a main body (32) which has a fastening part (36) for fastening the object and which has a T-shaped engagement part (38) for engaging through the slot (22) and for engaging behind the outer walls (26) on their inner sides (28) which delimit the groove (20), the T-shaped engagement part protruding from the fastening part (36). According to the invention, a screw nut (34) screwed onto an external screw thread (50) on a lateral surface (48) of the fastening part (36) is provided, the screw nut having an internal screw thread (64) which interacts with the external screw thread (50) and having an end contact surface (66) for application to outer sides (30) of the outer walls (26), the outer sides being opposite from the inner sides (28).

Description

[0001] Fastening device

[0002] The invention relates to a fastening device according to the preamble of claim 1.

[0003] Known fastening devices of this type are used to attach hose holders, pipe clamps, and the like to a holding device having a C-profile. This is usually designed as an aluminum support profile with a rectangular, in particular square, cross-section, with a C-profile extending over the entire length of the support on each of the four sides. Each of the C-profiles has a central slot that extends over the entire length of the support and toward which a groove with a T-shaped cross-section is open. The slot is delimited on two opposite sides by the free edge of an outer wall of the respective C-profile and widens inwards to form the T-shaped groove.The previously known fastening devices comprise a base body with a fastening section to which the hose holder or pipe clamp can be attached, and an engagement section protruding from the fastening section. The engagement section is T-shaped and designed to engage through the slot into the T-shaped groove. The engagement section has a longitudinal section protruding centrally in the axial direction from the fastening section and a transverse section arranged transversely to this section at the end facing away from the fastening section. The transverse section has a width that is slightly smaller than the width of the slot and a length, measured transversely to the width, that is greater than the width of the slot. The fastening device is attached to the C-profile by inserting the engagement section into the slot and then rotating it by approximately 90° so that the transverse section engages behind the outer walls bordering the slot on both sides.In this position, the engaging section can no longer be pulled out of the slot. To hold it in this position, the distance between the transverse section and the fastening section in conventional fastening devices is dimensioned such that a clamping effect occurs when the fastening device is rotated 90° after the engaging section has been inserted into the slot. For this purpose, the dimensions of the fastening device must be adapted to the thickness of the outer walls of the C-profile used.

[0004] It is therefore an object of the invention to further develop a fastening device of the type mentioned at the outset in such a way that it can be used for C-profiles with outer walls of different thicknesses.

[0005] This object is achieved according to the invention by a fastening device having the features of claim 1. Advantageous developments of the invention are the subject of the dependent claims.

[0006] The invention is based on the idea of ​​constructing the fastening device in two parts, comprising a base body having the engagement section and a screw nut connected to the base body by means of a screw connection and thus movable relative to the base body. The screw nut has a contact surface for engaging the outer sides of the outer walls of the C-profile, which faces away from the inner sides, which are engaged behind by the engagement section. By rotating the screw nut relative to the base body, the distance between the contact surface and the transverse section of the engagement section, which engages behind the outer walls, can be varied to achieve a clamping effect.The outer walls are then clamped between the contact surface of the screw nut and the engagement part so that the fastening device sits firmly on the C-profile and, particularly due to the frictional connection between it and the C-profile, cannot be twisted again so that the engagement part can be pulled out of the slot. The base body is expediently made from a plastic and preferably in one piece. It is also preferred that the screw nut is made from a plastic and preferably in one piece. In this way, both parts of the fastening device can be manufactured easily and inexpensively. It is also preferred that the base body and the screw nut are made from the same plastic. If the fastening device is worn out, both parts can then be disposed of together.

[0007] The engagement section expediently has a longitudinal section protruding centrally in the axial direction from the fastening section and a transverse section arranged transversely to this at the end thereof facing away from the fastening section. It is preferred that the engagement section has diametrically opposed bevels at the opposite free ends of the transverse section and / or on a boundary surface surrounding the longitudinal section and, at a distance from the bevels, diametrically opposed stop surfaces for striking the holding device. As a result of this measure, the base body can only be rotated relative to the holding device in one direction of rotation by approximately 90° until the stop surfaces strike the holding device. This one possible direction of rotation expediently corresponds to the direction of rotation in which the screw nut can be rotated relative to the base body in order to clamp the holding device to the C-profile, i.e. the clockwise direction of rotation.It is also possible, however, to arrange the bevels and stop surfaces so that the possible direction of rotation corresponds to the counterclockwise direction. In this case, a left-hand thread can advantageously be provided between the base body and the screw nut. The engagement part is inserted into the slot and then turned by engaging the screw nut, which takes the base body with it until the stop surfaces hit the holding device. The screw nut is then turned relative to the base body until the fastening device clamps onto the C-profile. This means that the fastening device can be mounted on the holding device with one hand. The fastening part expediently has a projection that projects radially beyond the outer surface and runs all the way around on its end face facing away from the engagement part.The projection defines the outer surface with the external thread in the axial direction and limits the movement of the nut in this direction. The projection also expands the surface area of ​​the end face, allowing for more versatile use. The nut can be designed as a hexagon nut or a knurled nut, allowing it to be easily turned by hand relative to the base body.

[0008] It is possible for the fastening section to have at least one integrally formed fastening means for fastening the object. Such an embodiment is particularly simple and inexpensive to produce. However, it is preferred that at least one fastening means for fastening the object is releasably received in the fastening section. This can then be made of a different material than the base body. It is preferred that at least one fastening means received in the fastening section is made of a material that is harder than the material from which the fastening section is made. For example, if the fastening section or the entire base body is made of plastic, it can be advantageous if the fastening means is made of metal in order to enable a more stable fastening of the object.

[0009] The fastening section expediently has an opening through which at least one fastening means can be inserted and removed. The fastening means is then interchangeably accommodated in the base body and can be replaced as needed. Furthermore, it can be removed from the base body for the disposal of a worn fastening device and for its separate sorting. It is preferred that the opening is arranged in the outer surface. It is then covered by the screw nut when the fastening device is installed. Advantageously, the fastening section has at least one elastically deformable retaining element which is elastically deformed through the opening when the fastening means is inserted and removed. This measure reliably holds the fastening means in its position.

[0010] Conveniently, at least one fastening means has an internal thread for establishing a screw connection with the object. The internal thread can, for example, be formed directly onto the fastening section. If the fastening means is removably received in the fastening section, it can, for example, be a nut with an internal thread, in particular a square nut or a hexagon nut. The fastening means can also, for example, be a nut that is pressed into the base body and cannot be removed without damage.

[0011] The invention will be explained in more detail below with reference to an embodiment shown schematically in the drawing.

[0012] Fig. 1 shows several fastening devices with hose holders and a corrugated hose attached to a support profile;

[0013] Fig. 2a, b, c a fastening device in perspective view from above and from below as well as in longitudinal section;

[0014] Fig. 3a, b, c the fastening device according to Fig. 2a, b, c in side view and in a section along the line AA without and with the screw nut screwed onto the base body and

[0015] Fig. 4a, b, c the attachment of a fastening device according to Fig. 2a, b, c and Fig. 3a, b, c to an aluminum support profile.

[0016] Fig. 1 shows how several identical fastening devices 10 according to the invention, which are shown in detail in Fig. 2a, b, c and Fig. 3a, b, c, are used to fasten hose holders 12 to an aluminum support profile 14. A corrugated hose 16 is fastened to the support profile 14 by means of the hose holders 12. It goes without saying, however, that other objects, such as Velcro fasteners, can also be fastened to the support profile 14 by means of the fastening devices 10, and that individual fastening devices 10 can also be used. The support profile 14 is elongated with a square cross-section and has a C-profile 18 on each of its four sides. Each of the C-profiles 18 has a T-shaped groove 20 that is open towards a slot 22 that is delimited on both sides by free edges 24 of outer walls 26 of the support profile 14.The T-shaped groove 20 is defined by inner sides 28 of the outer walls 26, starting from the slot 22. Outer sides 30 of the outer walls 26, facing away from the inner sides 28, form the outer contour of the support profile 14. In the illustrated embodiment, all four C-profiles 18 are identical. However, it is also possible to design the C-profiles 18 differently, for example, with regard to the width of the slot 22, the thickness of the outer walls 26, or the width of the outer walls 26.

[0017] Each of the fastening devices 10 shown in Fig. 1 is constructed in two parts, comprising a base body 32 made in one piece from a plastic material and a screw nut 34 also made in one piece from the same plastic material. The base body has a fastening section 36, from which an engagement section 38 protrudes on an underside. The engagement section 38 has a longitudinal section 40 protruding centrally in the axial direction from the fastening section 36 and a transverse section 42 arranged transversely to the longitudinal section 40 at the end thereof facing away from the fastening section 36. The transverse section 42 protrudes beyond the longitudinal section 40 in a transverse direction and has a length in this direction that is greater than the width of the slot 22. Its width, measured transversely to the length, is, however, somewhat smaller than the width of the slot 22 and corresponds approximately to the width of the longitudinal section 40 measured in the same direction.The transverse section 42 is also rounded in a mushroom shape, and both the longitudinal section 40 and the transverse section 42 have diametrically opposed bevels 44 and, at a distance from the bevels 44, diametrically opposed stop surfaces 46 for stopping against a wall of the C-profile 18. The fastening section 36 has a circumferential surface 48 on which an external thread 50 is arranged. On an end face 52, the fastening section 36 has a projection 54 which projects circumferentially beyond the circumferential surface 48. A blind hole 56 is also arranged in the end face 52, into which a screw bolt of the hose holder 12 is inserted when used according to Fig. 1. In the blind hole 56, a fastening means in the form of a square screw 58 is accommodated, with the internal thread of which the external thread on the screw bolt of the hose holder 12 is screwed in order to fix the hose holder 12 to the fastening device 10.The square head screw 58 can be inserted into and removed from the fastening section 36 through an opening 60 in the outer surface 48. Retaining elements in the form of locking lugs 62 are formed integrally on the fastening section 36. These retaining elements hold the square head screw 58 in position and are elastically deformed upon insertion or removal. The screw nut 34 has an internal thread 64, with which it is releasably connected to the external thread 50 on the outer surface 48. Facing away from the end face 52, the screw nut 34 has a contact surface 66 with which it rests against the outer sides 30 of the outer walls 26. The screw nut 34 closes the opening 60 in the outer surface 48.

[0018] Fig. 4 a, b, c show the assembly of the fastening device 10 on the support profile 14. First, the engagement section 38 is guided through the slot 22, with the transverse section 42 aligned parallel to the longitudinal extent of the slot 22. The fastening device 10 is then rotated clockwise until the stop surfaces 46 abut the inner surfaces of the C-profile 18. Counterclockwise rotation would not be possible because the stop surfaces 46 would oppose this, whereas clockwise rotation is possible due to the bevels 44. Finally, the screw nut 34 is turned further clockwise, whereby it cannot drive the base body 32 due to the stop surfaces 46 abutting the C-profile 18.By rotating the screw nut 34 relative to the base body 32, the distance between the contact surface 66 and the transverse section 42 decreases, so that the outer walls 26 are clamped between the screw nut 34 and the transverse section 42. This frictional engagement holds the fastening device 10 firmly to the C-profile 18. The fastening device 10 can then be equipped with an object, such as the hose holders 12 shown in Fig. 1.In summary, the following can be stated: The invention relates to a fastening device 10 for fastening an object, such as a hose holder 12 or a pipe clamp, to a holding device 14 having a C-profile 18, wherein the C-profile 18 has a T-shaped groove 20 which is open towards a slot 22, wherein the slot 22 is delimited on opposite sides by the free edge 24 of an outer wall 26 of the C-profile 18, with a base body 32 which has a fastening part 36 for fastening the object and a T-shaped engagement part 38 protruding from the fastening part 36 for engaging through the slot 22 and for engaging behind the outer walls 26 on their inner sides 28 delimiting the groove 20.According to the invention, a screw nut 34 is provided which is screwed onto an external thread 50 on a lateral surface 48 of the fastening part 36 and which has an internal thread 64 which cooperates with the external thread 50 and a front-side contact surface 66 for contact with the outer sides 30 of the outer walls 26 facing away from the inner sides 28.

Claims

Claims 1 . A fastening device for fastening an object, such as a hose holder (12) or a pipe clamp, to a holding device (14) having a C-profile (18), wherein the C-profile (18) has a T-shaped groove (20) which is open towards a slot (22), wherein the slot (22) is delimited on opposite sides by the free edge (24) of an outer wall (26) of the C-profile (18), with a base body (32) which has a fastening part (36) for fastening the object and a T-shaped engagement part (38) projecting from the fastening part (36) for engaging through the slot (22) and for engaging behind the outer walls (26) on their inner sides (28) delimiting the groove (20), characterized by a screw nut (34) screwed onto an external thread (50) on a lateral surface (48) of the fastening part (36),which has an internal thread (64) cooperating with the external thread (50) and a frontal contact surface (66) for contact with the outer sides (30) of the outer walls (26) facing away from the inner sides (28).

2. Fastening device according to claim 1, characterized in that the base body (32) is preferably made in one piece from a plastic.

3. Fastening device according to claim 1 or 2, characterized in that the screw nut (34) is preferably made in one piece from a plastic.

4. Fastening device according to claim 2 and claim 3, characterized in that the base body (32) and the screw nut (34) are made of the same plastic.

5. Fastening device according to one of the preceding claims, characterized in that the engagement part (38) has a longitudinal part (40) projecting centrally in the axial direction from the fastening part (36) and a transverse part (42) arranged transversely to the latter at the end thereof facing away from the fastening part (36).

6. Fastening device according to claim 5, characterized in that the engagement part (38) has diametrically opposite bevels (44) on the mutually opposite free ends of the transverse part (42) and / or on a boundary surface surrounding the longitudinal part (40) and, at a distance from the bevels (44), diametrically opposite stop surfaces (46) for stopping on the holding device (14).

7. Fastening device according to one of the preceding claims, characterized in that the fastening part (36) has, on its end face (52) facing away from the engagement part (38), a projection (54) projecting radially beyond the lateral surface (48) and running all the way around.

8. Fastening device according to one of the preceding claims, characterized in that the screw nut (34) is designed as a hexagon nut or as a knurled nut.

9. Fastening device according to one of the preceding claims, characterized in that the fastening part (36) has at least one integrally formed fastening means for fastening the object.

10. Fastening device according to one of the preceding claims, characterized in that at least one fastening means (58) for fastening the object is releasably received in the fastening part (36).

11. Fastening device according to claim 10, characterized in that at least one fastening means (58) received in the fastening part (36) is made of a material which is harder than the material from which the fastening part is made.

12. Fastening device according to claim 10 or 11, characterized in that the fastening part (36) has an opening (60) through which at least one fastening means (58) can be inserted and removed.

13. Fastening device according to claim 12, characterized in that the opening (60) is arranged in the lateral surface (48).

14. Fastening device according to claim 12 or 13, characterized in that the fastening part (36) has at least one elastically deformable retaining element (62) which is elastically deformed when the fastening means (58) is inserted and removed through the opening (60).

15. Fastening device according to one of claims 9 to 14, characterized in that at least one fastening means (58) has an internal thread for producing a screw connection with the object.

Images