Roof hooks and arrangement of roof hooks and fixing element

Abstract

Roof hook for fixing a mounting rail (2) to a roof structure comprising a foot section (3) which is formed at least indirectly on the roof structure for fixing the roof hook (1), a connecting section (4) and a receiving section (5) which is formed for receiving the mounting rail (2), wherein the receiving section (5) is formed in one piece, has a bottom section (5.3) and a first and a second leg section (5.1, 5.2) such that a mounting rail (2) inserted in the receiving section (5) is enclosed on three sides, wherein a bore (5.4) with an internal thread is provided in the first leg section (5.1) into which a screw (6) can be screwed, wherein the mounting rail (2) can be pressed against the inside of the second leg section (5.2) by means of the screwed-in screw (6).

Description

[0001] The innovation concerns a roof hook as well as an arrangement consisting of a roof hook and a fixing element.

[0002] Roof hooks for attaching photovoltaic modules to a roof are generally known. For example, German patent application DE 10 2010 054 175 A1 discloses a roof hook arrangement comprising a roof hook and a fixing element. The fixing element is designed for at least indirect attachment to a roof structure. The roof hook can be fixed to this fixing element in different height positions by means of a locking mechanism.

[0003] A disadvantage of the known device is that the assembly effort for attaching mounting rails to the roof hooks is relatively high, as several people are needed to attach the mounting rail to the roof hooks.

[0004] Based on this, the task of the innovation is to provide a roof hook that enables simple and therefore cost-effective installation.

[0005] The problem is solved by a roof hook according to the features of claim 1. Advantageous embodiments are the subject of the dependent claims.

[0006] The innovation relates to a roof hook for fixing a mounting rail to a roof structure. The roof structure includes a base section designed to at least indirectly fix the roof hook to the roof structure. The roof hook also comprises a connecting section and a receiving section. The receiving section is designed to accommodate the mounting rail. It is a single piece and has a base section as well as a first and a second leg section, so that a mounting rail inserted into the receiving section, particularly one inserted from above, is enclosed on three sides. The first leg section has a bore with an internal thread into which a screw can be inserted. The screwed-in screw allows the mounting rail to be pressed against the inside of the second leg section.

[0007] The key advantage of the roof hook is that it allows for easier and less labor-intensive installation of the mounting rails on the roof. This is because a single person can insert the mounting rails into the receiving section from above, and the receiving section holds them securely in place, preventing them from falling out. Once aligned, the mounting rail can then be permanently fixed in place by clamping it with the screw.

[0008] According to one embodiment, the length of the screw shank is adapted to the wall thickness of the first leg section such that, when the screw head rests against the outside of the first leg section, the mounting rail is clamped in the receiving section with a target contact pressure acting against the second leg section. This means that the screw does not need to be tightened to a specific torque to achieve the target contact pressure; instead, the limitation of the screw-in movement by the screw head directly creates the target contact pressure, without the need to limit the tightening torque of the screw.

[0009] According to one embodiment, the second leg section has at least partial ribbing or contouring on its inner surface, designed to be pressed at least partially into the material of the mounting rail by the clamping pressure exerted by the screw. This achieves at least partial material engagement of the second leg section with the mounting rail, which, in addition to the clamping force alone, improves the fixation of the mounting rail.

[0010] According to one embodiment, the receiving section has a U-shaped cross-section and encloses a mounting rail inserted into the receiving section from below and at least partially on two opposing side surfaces. This allows the mounting rail to be inserted into the receiving section from above and, once inserted, is held in place by the roof hook, which significantly simplifies installation.

[0011] According to one embodiment, the roof hook is designed as a single-piece hook element comprising the receiving section, the connecting section, and the base section. This further simplifies assembly, as multiple parts do not need to be assembled. Moreover, this design makes the roof hook simple and inexpensive to manufacture.

[0012] According to one embodiment, the one-piece hook element is formed from a section of an extruded profile. This reduces the cost of manufacturing the roof hook.

[0013] According to one embodiment, the connecting section and the base section are formed by a single piece of extruded profile. The receiving section is coupled to the connecting section as a separate element by means of a screw connection or a rivet connection. This allows the receiving section to be aligned in different rotational positions relative to the connecting section, thus offering flexibility in the alignment of the mounting rails.

[0014] According to one embodiment, the receiving section can be aligned at different angles relative to the connecting section. This allows the mounting rail to be attached to the roof hook not only in a predetermined orientation, but at any angle, in particular parallel or substantially parallel to the roof slope.

[0015] According to one embodiment, the connecting section is U-shaped and has a first and a second leg and an intermediate section connecting the legs. The receiving section is located at the free end of the first leg furthest from the intermediate section, and the foot section is located at the end of the second leg furthest from the intermediate section. This results in a substantially U-shaped roof hook, in which, when the intermediate section of the connecting section is oriented vertically, the receiving section is positioned directly vertically above the foot section. This is advantageous for transferring the forces acting on the mounting rail into the fixing element that connects the roof hook to the roof structure.

[0016] According to one embodiment, the base section has a mounting surface with a height profile designed to interact with a fixing element to be attached to the roof structure. The fixing element has a fixing section with a height profile, so that the interaction of the height profiles creates a positive-locking connection between the base section and the fixing element. The roof hook can thus be fixed at different height positions on the fixing element, allowing for height adjustment.

[0017] According to one embodiment, the base section has an elongated hole through which a screw can be passed to fix the roof hook to a fixing element attached to the roof structure. The elongated hole ensures that the roof hook can be attached to the fixing element by means of a screw, regardless of different height positions.

[0018] According to one embodiment, the roof hook can be positioned at different heights on the fixing element by means of the interaction of the height profiles and secured by a screw passed through the elongated hole. This results in advantageous ease of mounting the roof hook.

[0019] According to one embodiment, the roof hook is formed from a section of an extruded aluminum profile. This allows the roof hook to be manufactured very cost-effectively.

[0020] According to another aspect, an arrangement comprising a roof hook designed according to one of the prescribed embodiments and a fixing element that can be attached to a roof structure is disclosed.

[0021] According to one embodiment of the arrangement, the fixing element has a contact section designed for at least indirect contact with the roof structure. The element also has a fixing section with a height profile. This fixing section runs diagonally to the contact section, forming an acute angle with it. This allows for adjustment not only in height but also in the direction of the roof slope, which is advantageous for aligning the roof hook.

[0022] According to one embodiment, a groove is provided in the fixing section into which a T-nut can be inserted. A screw can be screwed into this T-nut to fix the roof hook. This also allows for advantageous lateral movement of the roof hook relative to the fixing element and clamping of the roof hook to the fixing element in any desired sliding position.

[0023] According to one embodiment, the fixing element is formed by a section of an extruded profile, in particular a section of an aluminum extruded profile. This allows the fixing element to be manufactured very cost-effectively.

[0024] The terms “approximately”, “essentially” or “about” mean, within the meaning of the invention, deviations from the respective exact value by + / - 10%, preferably by + / - 5% and / or deviations in the form of changes that are insignificant for the function.

[0025] Further developments, advantages, and application possibilities of the innovation also arise from the following description of exemplary embodiments and from the figures. All described and / or illustrated features, individually or in any combination, are fundamentally the subject of the innovation, irrespective of their inclusion in the claims or their cross-reference. The content of the claims is also incorporated into the description.

[0026] The innovation is explained in more detail below using figures illustrating exemplary implementations. These figures show: Fig. 1. An exemplary first embodiment of an arrangement consisting of a roof hook and a fixing element in a perspective view; Fig. 2. For example, the arrangement according to Fig. 1 in a page view; Fig. 3. For example, the roof hook of the arrangement according to Fig. 1 and Fig. 2 in a side view in isolation; and Fig. 4. An exemplary second embodiment of an arrangement consisting of a roof hook and a fixing element is shown in a perspective view.

[0027] Fig. Figure 1 shows a perspective view of an arrangement consisting of a roof hook 1 and a fixing element 10 and Fig. Figure 2 shows a side view of this arrangement. The fixing element 10 is designed to be fixed to a roof structure, for example, of a building. A roof hook 1 can be detachably attached to the fixing element 10 by means of a screw 7, so that the roof hook 1 can be indirectly connected to the roof structure via the fixing element 10. In an embodiment not shown, however, the fixing element 10 can also be an integral part of the roof hook 1, i.e., the roof hook 1 and the fixing element 10 are not detachable from each other, but are formed by a single, integral element.

[0028] The roof hook 1 is designed to fix a mounting rail 2 to the roof structure. The mounting rail 2 can, for example, be a rail made of an extruded aluminum profile, which is used, for instance, to attach photovoltaic modules.

[0029] The roof hook 1 is shaped like a bow. It has a foot section 3, a connecting section 4 and a receiving section 5.

[0030] In the Fig. 1 and Fig. In the embodiment shown in Figure 2, the receiving section 5 is an integral part of the roof hook 1, i.e., formed integrally with the connecting section 4 and the base section 3. Alternatively, the receiving section 5 can be formed by a separate element and connected to the connecting section 4 by means of a screw connection or a rivet connection (see Figure 2). Fig. 4).

[0031] The receiving section 5 comprises a first leg section 5.1, a second leg section 5.2, and a base section 5.3 extending between leg sections 5.1 and 5.2. The receiving section 5 preferably has a U-shaped cross-section. A receiving space is formed within the receiving section 5 into which a mounting rail 2 can be inserted. After the mounting rail 2 is inserted, it rests against the base section 5.3 and is at least partially enclosed laterally by leg sections 5.1 and 5.2. This provides the mounting rail 2 with initial fixation after it has been inserted into receiving section 5 by at least two roof hooks 1, so that it does not need to be held by an installer during further assembly.

[0032] As particularly in Fig. As can be seen in Figure 3, the first leg section 5.1 has a bore 5.4 into which a screw 6 can be screwed. The bore 5.4 runs with its longitudinal axis preferably parallel or substantially parallel to the contact surface of the base section 5.3, against which the mounting rail 2 comes to rest after insertion. By screwing in the screw 6, the mounting rail 2 is clamped in the receiving section 5, since the free end of the screw 6 exerts a lateral force on the mounting rail 2, which presses the mounting rail 2 against the second leg section 5.2.

[0033] The shank of screw 6, which carries the external thread, has a length adapted to the wall thickness of the first leg section 5.1. This length is selected such that when screw 6 is fully screwed into the bore 5.4, so that the screw head of screw 6 comes into contact with the outside of the first leg section 5.1, the screw 6 exerts a specified contact pressure against the mounting rail 2. This means that screw 6 does not need to be tightened to a predetermined torque to achieve this specified contact pressure; instead, the screw head limits the screwing process, thus fixing the mounting rail 2 to the roof hook 1 with a defined clamping force when screw 6 is fully screwed in.

[0034] Preferably, the second leg section 5.2 has a knurled surface 5.2.1 or other contoured surface on its inner surface facing the receiving space for the mounting rail 2. In other words, the inner surface is not flat but has a deliberate raised structure that prevents the clamped mounting rail 2 from being detached from the receiving space of the roof hook 1. The knurling 5.2.1 or contoured surface is preferably designed such that it is at least partially pressed into the material of the mounting rail 2 when the mounting rail 2 is pressed against the inner surface of the second leg section 5.2 by the screw 6. This indentation effectively prevents the mounting rail 2 from being unintentionally detached from the receiving section 5, for example, under high wind forces acting on the photovoltaic modules attached by means of the mounting rail 2.

[0035] As particularly in Fig. As can be seen in Figure 3, which shows the roof hook 1 in isolation, the connecting section 4 of the roof hook 1 preferably has a U-shaped form and comprises a first leg 4.1, a second leg 4.2, and an intermediate section 4.3 arranged between the first and second legs 4.1, 4.2, which connects the first and second legs 4.1, 4.2 to each other. The connecting section 4 can be U-shaped or substantially U-shaped. The legs 4.1, 4.2 preferably run obliquely to each other, for example at an angle between 10° and 30°, opening towards the receiving section 5 and the base section 3. This shape of the connecting section 4 allows the mounting rail 2 to be secured against the base section 3, and thus also against the roof structure, when the roof hook 1 is installed.

[0036] The foot section 3 is arranged at the free end of the second leg 4.2 of the connecting section 4. The longitudinal axis of the foot section 3 runs obliquely to the longitudinal axis of the second leg 4.2 of the connecting section 4. In particular, the longitudinal axis of the second leg 4.2 of the connecting section 4 forms an acute angle with the longitudinal axis of the foot section 3, which opens towards the side facing away from the intermediate section 4.3 of the connecting section 4.

[0037] The base section 3 has a mounting surface 3.1 facing away from the receiving section 5 of the roof hook 1. The mounting surface 3.1 features a height profile, for example formed by longitudinal ribbing, the contour lines of which run transversely, and in particular perpendicularly, to the longitudinal axis of the base section 3. Furthermore, the base section 3 has an elongated hole 3.2, the longitudinal axis of which runs parallel or substantially parallel to the longitudinal axis of the base section 3.

[0038] As especially in the Fig. 1 and Fig. As can be seen in Figure 2, the fixing element 10 has a mounting section 10.2 that is at least indirectly attached to the roof structure. The mounting section 10.2 preferably has several bores by means of which the fixing element 10 can be screwed to the roof structure.

[0039] A fixing section 10.1 is provided projecting obliquely from this system section 10.2. The fixing section 10.1 is preferably provided in a first sub-area of ​​the fixing element 10 and runs at an acute angle to the system section 10.2.

[0040] The fixing section 10.1 has a height profile, which is formed, for example, by longitudinal ribbing whose contour lines run parallel to the plane spanned by the mounting section 10.2. The height profile is preferably identical or substantially identical in shape to the height profile of the base section 3, so that the height profiles of the fixing section 10.1 and the base section 3 can be interlocked, resulting in at least a partial positive fit. By aligning the profile lines of the height profiles, the roof hook can be fixed to the fixing element 10 in several different height positions, in steps depending on the distance between two adjacent height profile lines. Furthermore, the roof hook 1 can be fixed to the fixing element 10 in any lateral position along the direction of the height profile lines.

[0041] A groove 11 is provided in the fixing section 10.1 of the fixing element 10. This groove 11 preferably runs parallel to the height profile lines of the fixing section 10. The groove 11 is designed to allow a T-nut to be inserted in a form-fitting manner, for example, by sliding it laterally into the groove 11. The T-nut has a bore with an internal thread into which a screw 7 can be screwed to secure the form-fitting connection achieved by the interlocking height profiles. In particular, the screw 7 is designed to extend through the base section 3 of the roof hook 1 in the elongated hole 3.2 in order to be screwed into the T-nut and thus secure the roof hook 1 to the fixing element 10.

[0042] The fixing element 10 is preferably formed by a section of an aluminum extrusion profile. The extrusion profile can in particular be a chambered profile traversed by cavities and preferably has at least one transverse web by means of which the fixing section 10.1 is supported against the mounting section 10.2.

[0043] Fig. Figure 4 shows a second embodiment of the roof hook 1. The following explains only the differences between this roof hook 1 and the previously described embodiment. Otherwise, the previous statements also apply to this embodiment.

[0044] The essential difference of the second embodiment of the roof hook 1 is that the receiving section 5 is not an integral part of a one-piece roof hook 1, but rather only the base section 3 and the connecting section 4 are formed by a single, one-piece element. The receiving section 5 is arranged on the upper side of the first leg 4.1 of the connecting section 4 in the region of its free end and is coupled to it by means of a screw connection or a rivet connection. This offers the advantage that the receiving section 5 can be aligned and preferably fixed at different angular orientations relative to the connecting section 4 or the base section 3, depending on the installation situation, in particular such that the mounting rail 2 is not perpendicular or substantially perpendicular to the longitudinal extent of the first leg 4.1 of the connecting section 4 runs, but at an angle deviating from a right angle, in particular in the direction of the longitudinal extension of the first leg 4.1 of the connecting section 4. This allows a mounting rail 2 to be mounted running in the direction of the roof slope using the roof hook 1.

[0045] The innovation has been described above using exemplary embodiments. It is understood that numerous modifications and adaptations are possible without departing from the underlying concept of the innovation. Reference symbol list 1 roof hook 2 mounting rails 3 foot section 3.1 Mounting area 3.2 Slotted hole 4 Connection section 4.1 First leg 4.2 second leg 4.3 Interim Section 5 Recording section 5.1 First thigh section 5.2 second thigh section 5.2.1 Ribbing / Contouring 5.3 Ground section 5.4 Bore 6 screws 7 screw 10 fixing element 10.1 Fixing section 10.2 Plant section 11 Nut QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2010 054 175 A1

[0002]

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