Fastening device for attaching a round profile element to a round profile beam

Abstract

Fastening device for attaching a round profile element to a round profile support, wherein the fastening device comprises a fastening means and a clamping means, wherein the fastening means receives the round profile element and the fastening means can be fastened to the round profile support by means of the clamping means, characterized in that the fastening means (B) is formed by a crescent-shaped element with a concave inner surface (5) for bearing against the round profile element (RT) and a convex outer surface (8) for receiving the clamping means (S) and consists of a flexible material, in particular a flexible rubber material or a plastic material, wherein the crescent-shaped element is provided between the outer surface (6) and the inner surface (5) with a bore-shaped receiving space (10) for receiving and enclosing the round profile element (RP),wherein a slot (15) is formed in the crescent-shaped element, leading from the bore-shaped receiving chamber (10) to the inner surface (5), for inserting the round profile element (RP) into the receiving chamber (10).

Description

[0001] The invention relates to a fastening device for attaching a round profile element to a round profile support, wherein the fastening device comprises a fastening means and a clamping means, wherein the fastening means receives the round profile element and the fastening means can be attached to the round profile support by means of the clamping means.

[0002] Such fastening devices are used to fasten a round profile element, for example a cable, a cable set comprising several individual cables, or an electrical line or hose to a round profile support, for example a hydraulic cylinder of a lifting mast of a mobile working machine, for example a forklift truck.

[0003] Various fastening devices are known for attaching round profile elements, such as cables, electrical wires, or cable sets, to round profile supports in a wide variety of combinations. These include special clips, hose or pipe clamps, clamps, brackets, or tensioning devices such as cable ties or cable tie combinations. Such cable tie combinations consist of a first cable tie, which is attached to the round profile support, and a second cable tie, which is attached to the first cable tie and with which the round profile element can be fastened to the first cable tie and thus to the round profile support.

[0004] The selection of a suitable fastening device depends on the diameter of the round profile support and the diameter of the round profile element to be held.

[0005] Manufacturers of mobile machinery must maintain a large number of different fastening devices due to the multitude of different round profile elements and round profile beams with varying diameters that need to be secured. This is particularly true for fastening devices used to hold various cables or hoses as round profile elements on a round profile beam formed by a lifting cylinder of a lifting frame in a forklift truck. The varying sizes of lifting frames with different diameters and the different cables or hoses result in a large number of fastening device variants for forklift truck manufacturers, which facilitate the mounting of a cable or hose.attaching a hose line to a corresponding lifting cylinder is made more difficult and increases the manufacturing effort due to the large number of parts and fastening devices that need to be provided.

[0006] From EP 2 068 063 A2, a pipe clamp is known which consists of two metal strips connected to each other at a joint and between which an insulator, having receptacles for pipes to be held, can be clamped. The two metal strips are spaced apart from the joint and provided with a mounting hole for a fastening screw, by means of which the pipe clamp can be attached to a vehicle.

[0007] US Patent 2007 / 0007397A1 discloses a cable support assembly comprising a cable support and a strap attached to the cable support. The cable support has a plurality of clip-like retaining elements into which cables can be inserted. The cable support has two openings through which the strap, looped around the cables inserted into the clip-like retaining elements, is attached to the cable support. The cable support is provided with a mounting flange having a receiving hole for a screw, by which the cable support can be attached to an aircraft.

[0008] US Patent 2005 / 0029005A1 discloses a cable harness mounting protector comprising a base element with upward-facing grooves for receiving cables. A cover element, which covers the grooves, can be attached to the base element by means of a snap-fit ​​connection.

[0009] The present invention is based on the objective of providing a fastening device of the type mentioned at the outset, which is universally applicable and with which different round profile elements can be fastened to different round profile supports with minimal assembly and manufacturing effort.

[0010] This problem is solved according to the invention in that the fastening element is formed by a crescent-shaped element with a concave inner surface for bearing against the round profile element and a convex outer surface for receiving the clamping device, and is made of a flexible material, in particular a flexible rubber material or a plastic material, wherein the crescent-shaped element is provided between the outer surface and the inner surface with a bore-shaped receiving chamber for receiving and enclosing the round profile element, wherein a slot is formed in the crescent-shaped element leading from the bore-shaped receiving chamber to the inner surface for inserting the round profile element into the receiving chamber. A crescent-shaped orA crescent-shaped fastener made of a flexible and elastic material, for example rubber, with a concave inner surface, can easily adapt to different diameters of round profile beams due to its elastic properties. This allows the fastener according to the invention to be used universally with different round profile beams of varying diameters. Furthermore, the bore-shaped receiving space arranged between the outer and inner surfaces allows for the insertion of different round profile elements, ensuring that the round profile element to be held is completely enclosed by the fastener, thus preventing direct contact between the round profile element and the round profile beam.This enables thermal and mechanical decoupling of the round profile element, allowing for damage-protected attachment of the round profile element to the round profile support. The slot allows the round profile element to be easily inserted into the receiving space by bending the fastener open. Overall, this provides a standardized fastener that can be used to attach different round profile elements to different round profile supports, thus reducing assembly and manufacturing costs by minimizing the number of parts.

[0011] Preferably, the bore-shaped receiving space is arranged in a longitudinal center plane of the fastening device and the slot is arranged in the longitudinal center plane of the fastening device.

[0012] According to a preferred embodiment of the invention, the crescent-shaped fastening element is provided between the outer surface and the inner surface with at least one further bore-shaped receiving space for receiving and enclosing a further round profile element, wherein a slot is formed in the crescent-shaped element leading from the further bore-shaped receiving space to the inner surface, or a slot is formed leading from the further bore-shaped receiving space to an adjacent receiving space for inserting the further round profile element into the further receiving space. The central and symmetrical arrangement of the receiving space makes it possible to form further receiving spaces for additional round profile elements at the edge regions of the crescent-shaped fastening element, thereby enabling several round profile elements to be fastened to a round profile support using the fastening element according to the invention.Preferably, a slot is formed between two adjacent receiving spaces, which allows the corresponding round profile element to be inserted into the respective receiving space by bending the elastic and flexible fastening element. The arrangement of the additional receiving spaces between the inner and outer surfaces also ensures that the additional round profile element to be held can be completely enclosed by the fastening element, thus preventing direct contact between the additional round profile element and the round profile support. If the receiving spaces have different diameters, different round profile elements can be easily attached to a round profile support using the fastening element according to the invention, further increasing its universal applicability.

[0013] According to an advantageous embodiment of the invention, the fastening element is provided on its convex outer surface with a receiving groove for receiving the clamping element. The clamping element can be easily inserted into such a receiving groove on the outer surface of the fastening element, thereby effectively and easily securing the clamping element in the longitudinal direction and thus in the axial direction of the fastening element.

[0014] A further development of the invention offers a particular advantage in providing the fastening element with a holding device for the clamping element. This holding device allows for the simple creation of a locking mechanism to prevent the clamping element from being lost and facilitates its pre-fixation to the fastening element. This further simplifies and facilitates the handling of the fastening device according to the invention and enables quick and easy assembly of the fastening element, and thus of the fastening device, to the round profile beam.

[0015] According to a preferred embodiment of the invention, the holding device can be formed by a tab or an eyelet. The clamping element can be easily passed through such a tab or eyelet on the outer surface of the fastening element to achieve pre-fixation and / or to prevent the clamping element from being lost.

[0016] The clamping element of a fastening device according to the invention can be formed by a cable tie or a metal clamp, so that the universal applicability is further increased by appropriate selection of the clamping element.

[0017] According to a preferred embodiment of the invention, the round profile support is formed by a hydraulic cylinder of a lifting frame of a forklift truck, and the round profile element is formed by a cable system, in particular a cable, an electrical conductor or cable set, or a hose. With the universally applicable fastening device according to the invention, different cable systems or hoses can be attached to different lifting cylinders with minimal construction and assembly effort, so that a manufacturer of forklift trucks can achieve cost reductions by reducing the number of variants for different fastening devices.

[0018] The invention further relates to a mobile work machine, in particular a forklift truck, with a fastening device according to one of the preceding claims for fastening a round profile element, in particular a cable assembly or a hose, to a round profile support, in particular a hydraulic cylinder of a lifting frame. In mobile work machines, for example forklift trucks, the universally applicable fastening device according to the invention allows different round profile elements, designed as cables, electrical lines or cable sets, or as hoses, to be fastened to round profile supports formed by different hydraulic cylinders. The design of the fastening element, which consists of the flexible and elastic material and has receiving spaces that are bore-shaped and closed except for the slot, prevents pressure points and chafing on the cable assembly or hose.Direct contact with the hydraulic cylinder on the hose line is effectively avoided.

[0019] Further advantages and details of the invention are explained in more detail with reference to the exemplary embodiments shown in the schematic figures. Here, Fig. 1 a fastening device according to the invention in a perspective view, Fig. 2 the fastening device of the Fig. 1 in another view, Fig. 3 the fastening device of the Fig. 1 or 2 with a clamping device, Fig. 4 and Fig. 5 the fastening device with inserted round profile elements in different views and Fig. 6 and Fig. 7 A fastening device attached to a lifting cylinder of a lifting mast of a forklift truck in various views.

[0020] In the Fig. 6 and Fig. Figure 7 shows a fastening device 1 according to the invention as a cable holder or hose holder.

[0021] The fastening device 1 serves to hold and fasten at least one round profile element RP, preferably a cable assembly 2 formed from a cable, electrical lines or a cable set, or a hose assembly, to a round profile support RT, preferably a lifting cylinder 3 of a lifting mast of a mobile work machine designed as a forklift truck. The fastening device 1 has a fastening element B that receives the round profile element RP and is fastened to the round profile support RT by means of a clamping element S, in particular a cable tie or a metal clamp.

[0022] In the Fig. 6 and Fig. Figure 7 shows a section of a lifting mast of a forklift truck, wherein a vertical lifting frame profile 4 and a vertically arranged lifting cylinder 3 of the lifting mast are shown, wherein a fastening device B is attached to the lifting cylinder 3 forming the round profile support RT by means of a clamping device S in order to fasten a round profile element RP formed by the cable device 2 along the lifting cylinder 3.

[0023] The fastening element B according to the invention consists - as shown from the Fig. 1 and Fig. As can be seen in Figure 2, the fastener B is made of a flexible material, preferably an elastic rubber or an elastic plastic, and has a crescent-shaped or half-moon shape in a top view. This shape is formed by a concave inner surface 5 and a convex outer surface 6, which overlap at edge regions K1 and K2. The concave inner surface 5 of the fastener B serves as a bearing surface, allowing the fastener B to rest against the cylindrical outer wall of the round profile beam RT. The clamping element S is guided along the convex outer surface 6 of the fastener B, enabling the fastener B to be attached to the round profile beam RT. The fastener B further comprises a flat first end face 7 and a flat second end face 8, which are preferably arranged parallel to each other and define the height H of the fastener B.

[0024] To accommodate the clamping device S, the fastener B is provided with a receiving groove 9, which is arranged on the convex outer surface 6. The receiving groove 9 is preferably located in the central region of the height H of the fastener B.

[0025] The fastener B is provided with a bore-shaped receiving space 10 between the concave inner surface 5 and the convex outer surface 6, extending from the first end face 7 to the second end face 8. The receiving space 10 is arranged with its longitudinal axis on the longitudinal median plane E of the fastener B, which is perpendicular to the longitudinal axis L of the round profile beam RT. The longitudinal axis of the receiving space 10 is substantially parallel to the longitudinal axis L of the round profile beam RT.

[0026] The bore-shaped receiving chamber 10 is closed except for a slot 15. The slot 15 extends from the receiving chamber 10 to the concave inner surface 5 of the fastener B and covers the entire height H of the fastener B. The slot 15 serves to insert the round profile element RP into the receiving chamber 10. Preferably, the slot 15 is arranged in the longitudinal center plane E and thus symmetrically with respect to the two edge regions K1, K2 in the fastener B.

[0027] In the area of ​​the outer surface 6, the arrangement of the slot 15 and the receiving space 10 in the area of ​​the longitudinal center plane E leaves a hinge-like web section 16 of the flexible material. By bending the fastener B around this web section 16, the round profile element RP can be inserted into the receiving space 10. The web section 16, in conjunction with the flexible material, also allows the fastener B, with its concave inner surface 5, to adapt to different diameters of round profile beams RT.

[0028] The fastening element B according to the invention is provided, in addition to the centrally arranged receiving chamber 10, with at least one further bore-shaped receiving chamber 10a, 10b for receiving and enclosing a further round profile element RP, each extending from the first end face 7 to the second end face 8. The longitudinal axis of the receiving chamber 10a, 10b is arranged parallel to the longitudinal axis of the receiving chamber 10 and thus parallel to the longitudinal axis L of the round profile support RT. In the illustrated embodiment, two further receiving chambers 10a, 10b are provided. The receiving chamber 10a is arranged between the concave inner surface 5 and the convex outer surface 6 in the section of the fastening element B facing the edge region K1. Correspondingly, the receiving chamber 10b is arranged between the concave inner surface 5 and the convex outer surface 6 in the section of the fastening element B facing the edge region K2.

[0029] The bore-shaped receiving chamber 10a or 10b is closed except for a slot 15a or 15b. The slot 15a extends from receiving chamber 10a to the adjacent receiving chamber 10 and covers the entire height H of the fastener B. Due to the arrangement of the slots 15 and 15a, the area between receiving chamber 10a and the concave inner surface 5 forms a hinge-like web 16a. The slot 15a serves to insert the round profile element RP into receiving chamber 10a, whereby the round profile element RP can be inserted into receiving chamber 10a by bending the fastener B around the web 16a. Similarly, the slot 15b extends from receiving chamber 10b to the adjacent receiving chamber 10 and covers the entire height H of the fastener B.The arrangement of the slots 15 and 15b forms a hinge-like web area 16b in the area between the receiving space 10b and the concave inner surface 5. The slot 15b serves to insert the round profile element RP into the receiving space 10b, whereby the round profile element RP can be inserted into the receiving space 10b by bending the fastening element B around the web area 16b.

[0030] The clamping device S for attaching the fastening device B to the round profile beam RT is, according to the [document / section], Fig. In the embodiment shown in section 3, a cable tie 20 is provided, which according to the Fig. 6 and Fig. 7 wraps around the round profile beam RT and the fastener B along the concave outer surface 6 to connect the fastener B to the round profile beam RT. In the Fig. Figure 3 shows a locking element 21 of the clamping device S, for example a cable tie head of the cable tie 20.

[0031] In the area of ​​the receiving groove 9, the fastening element B can be provided with a retaining device 25, for example, an eyelet or tab arranged on the outer surface 6, through which the clamping element S can be passed. The retaining device 25 facilitates easy handling and assembly of the fastening device 1 on the round profile beam RT by pre-fixing and preventing loss of the clamping element 20 formed by the cable tie.

[0032] In the illustrated embodiment, the diameters of the bore-shaped receiving spaces 10, 10a, 10b are selected differently. Preferably, the diameter of the laterally arranged receiving spaces 10a, 10b is selected to be smaller than the diameter of the centrally arranged receiving space 10.

[0033] Several recording rooms 10, 10a, 10b make it possible to use several round profile elements RP, RP1, RP2 - as in the Fig. 4 and Fig.5 is shown - to be attached to the round profile beam RT using the fastening device B.

[0034] The fastening device 1 according to the invention offers a number of advantages.

[0035] The fastening device B makes it possible to attach one or more round profile elements RP, RP1, RP2 with different diameters to a round profile beam RT by means of a corresponding number and design of the receiving spaces 10, 10a, 10b.

[0036] When the clamping device 20 is tightened, the fastening element B, which consists of the flexible material, can adapt to different diameters of the round profile carrier RT, so that the fastening device 1 according to the invention can be used on different round profile elements RT.

[0037] When the fastening element B is made of a rubber material, the frictional properties of the rubber material prevent the fastening element B, which is attached to the round profile carrier RT, from slipping both circumferentially and longitudinally.

[0038] The fastening device B to the round profile beam RT can be made possible by a clamping device S formed as a cable tie or as a metal clamp.

[0039] A further advantage of the fastening device B according to the invention is that, due to the arrangement of the receiving spaces 10, 10a, 10b between the inner surface 5 and the outer surface 6, the round profile elements RP, RP1, RP2 to be held are enclosed by the fastening device B, thus preventing direct contact between the round profile element RP, RP1, RP2 and the round profile support RT. The mechanical and thermal stress on the round profile element RP, RP1, RP2 to be held, and any resulting damage to the round profile element RP, RP1, RP2, can therefore be reduced.

[0040] When using the fastening device 1 according to the invention in mobile working machines, for example industrial trucks, round profile elements RP of various diameters, designed as cables, cable sets, or electrical lines or as hoses, can be attached without damage to round profile supports RT designed as hydraulic cylinders of different diameters. The fastening means B effectively prevents pressure and control points on the cable, cable set, or electrical lines by avoiding direct contact with the hydraulic cylinder, thus reducing the mechanical stress on the cable, cable set, or electrical lines.The fastening device B according to the invention also reduces the thermal stress on the cable, cable set or electrical conductors and prevents damage to the cable, cable set or electrical conductors caused by this, if the hydraulic cylinder heats up due to hot pressure medium.

[0041] The fastening device B according to the invention thus provides a standardized and universally applicable fastening device B that can be used on different lifting cylinders for fastening different cables, cable sets, or electrical lines or hoses. This reduces manufacturing, assembly, and storage costs by reducing the number of parts.

Claims

[1] Fastening device for fastening a round profile element to a round profile support, wherein the fastening device comprises a fastening means and a clamping means, wherein the fastening means receives the round profile element and the fastening means can be fastened to the round profile support by means of the clamping means, characterized byin that the fastening means (B) is formed by a crescent-shaped element with a concave inner surface (5) for bearing against the round profile element (RT) and a convex outer surface (8) for receiving the clamping means (S) and consists of a flexible material, in particular a flexible rubber material or a plastic material, wherein the crescent-shaped element is provided between the outer surface (6) and the inner surface (5) with a bore-shaped receiving space (10) for receiving and enclosing the round profile element (RP), wherein a slot (15) leading from the bore-shaped receiving space (10) to the inner surface (5) is formed in the crescent-shaped element for inserting the round profile element (RP) into the receiving space (10). [2] Fastening device according to claim 1, characterized bythat the bore-shaped receiving space (10) is arranged in a longitudinal center plane (E) of the fastening means (B) and the slot (15) is arranged in the longitudinal center plane (E) of the fastening means (B). [3] Fastening device according to claim 1 or 2, characterized by in that the fastening means (B) is provided between the outer surface (6) and the inner surface (5) with at least one further bore-shaped receiving space (10a; 10b) for receiving and enclosing a further round profile element (RP1; RP2), wherein a slot (15a; 15b) is formed in the crescent-shaped element, which leads from the further bore-shaped receiving space (10a; 10b) to the inner surface (5), or a slot (15a; 15b) is formed, which leads from the further bore-shaped receiving space (10a; 10b) to an adjacently arranged receiving space (10), for inserting the further round profile element (RP1; RP2) into the further receiving space (10a; 10b). [4] Fastening device according to one of claims 1 to 3, characterized by that the fastening means (B) is provided on the convex outer surface (6) with a receiving groove (9) for receiving the clamping means (S). [5] Fastening device according to one of claims 1 to 4, characterized by that the fastening means (B) is provided with a holding device (25) for the clamping means (S). [6] Fastening device according to claim 5, characterized by that the holding device (25) is formed by a tab or an eyelet. [7] Fastening device according to one of claims 1 to 6, characterized by that the tensioning means (S) is formed by a cable tie (20) or a metal clamp. [8] Fastening device according to one of claims 1 to 7, characterized by that the round profile support (RT) is formed by a hydraulic cylinder (3) of a lifting frame of an industrial truck. [9] Fastening device according to one of claims 1 to 8, characterized by that the round profile element (RP; RP1; RP2) is formed by a cable device (2), in particular a cable, an electrical line or a cable set or a hose line. [10] Mobile work machine, in particular industrial truck, with a fastening device (1) according to one of the preceding claims for fastening a round profile element (RP; RP1; RP2), in particular a cable device (2) or a hose line, to a round profile support (RT), in particular a hydraulic cylinder (3) of a lifting frame.

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