DE102010060666A1 - System for spaced fastening plate-shaped modules i.e. solar modules, at trapezoid roof, has nut rotating when attracting screw against bore, so that supporting angle pushes away over screw at edge of bore against force applied by fastener - Google Patents

Abstract

The system has a module-side supporting angle (10) connected with a base area-side anchor via a screw loading fastener. A connection assembly i.e. star-shaped bridge, is arranged between the anchor and the supporting angle, and includes an attachment screw (22). A nut (20) rotates when attracting the screw against an upthreaded bore (11), so that the supporting angle pushes away over the screw at an edge of the upthreaded bore against the pressing force applied by the fastener. The threaded bore divides the nut into a short part and a prolonged part.

Description

The present invention is concerned with a system for fastening - in particular flat - components of various kinds on a parallel surface. In particular, the invention provides a system for mounting photovoltaic modules on a trapezoidal roof.

Photovoltaic modules are usually performed in a kind of rails, so-called support profiles in conventional systems. These support profiles are received in corresponding retaining profiles, which in turn are mounted on roofs. In conventional systems, the support profiles are attached to the support profiles via slide nuts and screws screwed therein, which can be moved in the profiles and clamp the profiles by tightening the screws in the sliding nuts against each other. Alternatively, in the case of particularly loaded such fasteners, sometimes even after the support and holding profiles have been aligned, a hole is bored through the support and holding profile, over which the sliding nut is pushed. A stuck through such a hole and screwed into the sliding nut screw thus connects the support and holding profiles permanently. However, this is - among other things by the additional necessary drilling of the holes during assembly - a very complex procedure.

Alternatively, the modules can be glued, for example, in the rails. An example of this procedure shows the DE 10 2004 009 935 , It relates to a method for fixing plate elements to rails, each plate element is fixed by means of quick fasteners to rails that have previously been attached, for example, to a roof structure. Here are at the bottom of each plate element evenly distributed at least three quick fasteners welded, soldered, screwed or glued. The respective plate element is pressed after the (required only for bonding) hardening of the adhesive with the attached quick fasteners against the rails so that the selbststrastend trained snap fasteners engage in the rails.

The DE 20 2008 011 312 U1 shows, for example, a locking system for locking a flat solar module on mutually parallel support profiles. At the support profiles facing the bottom of the solar module suitable retaining profiles are attached to the support profiles. Several retaining lugs are provided on the profiles. More specifically, a first retaining lug on each support profile is substantially along its upper edge and transverse to its extension direction, while each holding profile in the transverse direction to the extension thereof and parallel and spaced from the underside of the associated solar module each have a second retaining lug is arranged at a projecting solar module resting in a direction opposite to the first retaining lug direction. During assembly of a solar module, the holding profiles, which are attached to the solar module, pushed into the support profiles and the first and second retaining lugs engage in the final assembly position each other such that a lifting of the solar module is prevented by the support profiles. To lock the solar module to the support profiles, these have on the solar module facing top on a profile extending in the longitudinal direction locking groove in the finished assembled state of the solar module (ie superimposed retaining lugs) faces a second locking groove facing in the top of the support profiles Lower side of the retaining profiles is incorporated. In the demarcated from the two grooves inner channel from the side of the assembled solar module from a locking finger can be inserted, which prevents in the retracted state a moving apart of the mutually engaged first and second retaining lugs.

Furthermore, from the DE 20 2004 015 811 U1 a fastening device for a solar collector with a bend on the underside of a bordering frame known, comprising at least one support rail for attachment to associated roof hooks. A run in or on a U-shaped rail lower part is held at least one web, which has at least one predetermined breaking point at the bottom or on a spacer element at a distance to an engaging in the frame of the solar collector upper part. At least one screw that penetrates the parts vertically causes during assembly a biasing force, by which the web breaks at the lower part or at the spacer element at the predetermined breaking point. Due to the fracture is a further use of the parts, eg. B. after accidental tightening the screw or when replacing defective collectors, not possible.

Yet another example of such fasteners is shown in FIG DE 20 2009 011 708 U1 , which forms the basis for the preamble of claim 1. This document is intended to avoid the disadvantages of the above cited references. In particular, it is trying to create a fastener for solar panels, which is easy and safe to install and reusable. For this purpose, similar to the above-mentioned documents, a pair of rectangular profiled bars are fastened parallel to one another on a substructure, for example a roof. The profile bars have undercut fastening grooves, in which received mounting grooves of a fastener can be. In order to mount two profiled bars crosswise to each other aligned with each other (for example, the lower bar on the roof and the upper bar is attached to a solar module), flat profiles are provided which engage with guide tabs in grooves formed in the profile bars. In addition, the flat profiles have through holes, through which they can be connected with guided in the profile rods slide nuts or with the profiles themselves via screws and thereby fixed in the rails.

The hanger rails are hung in the profile bars. Then, the fastener is secured by a screw on the profile bar, which is screwed into a cut perpendicular to the Einhängenuten in the fastener thread.

In such fasteners naturally must be paid to a relatively accurate parallel mounting of the rails of a plane to use the solar modules on the roof in the rails can. Smaller assembly inaccuracies can be made on appropriately trained slots z. B. be compensated in said flat profiles.

Based on this prior art, the invention has the object to further simplify the assembly of plate-shaped modules on a roof while reducing the cost of attaching modules.

A corresponding fastening system according to the invention consists of a base-surface anchoring, a module-side support structure and a connection arrangement in which a rod-shaped element is screwed in advance by means of a screwed transversely to its longitudinal direction by the rod-shaped element fastening screw with the module-side support structure. This complete structure is connected to the ground surface anchoring that the rod-shaped element is slid in its thickness direction and the parallel depth direction of a slot obliquely through the matching with a clearance fit slot in the ground surface anchoring and then turned when tightening against the slot so that the rod-shaped element canted during further tightening against the underside of the slot. This ensures that the support structure can be inserted as a pre-assembled component from above into the base-surface anchoring, whereby the assembly is facilitated.

The attachment according to the invention makes it possible in particular to dispense with previously used profiled rails and thereby results in a material and thus cost savings compared to conventional fastening systems. In addition, the assembly is considerably simplified by eliminating the level of the rails.

Particularly preferably, the base-surface anchoring on a stop on which abuts the rod-shaped element. If the fastening screw is to be tightened in the rod-shaped element, the element can rotate with it until it abuts against a stop. The stop then prevents the further rotation of the element, thereby facilitating the assembly.

An angle is particularly preferably used as the module-side support structure. Such an angle also causes part of the angle to act as a stop for the rod-shaped member when, from the center of the bolting, one side of the rod-shaped member is long enough not to rotate past this stop. To achieve this in any position of the module-side support structure in the slot, but one side of the rod-shaped element, starting from a threaded hole in the rod-shaped element through which the fastening screw is screwed, be longer than the slot. In this case, moreover, the second side of the rod-shaped element must be shorter than the length of the oblong hole, so that the connection assembly can be assembled by passing through the slot. Thus, the threaded hole divides the rod-shaped element in this case into a shorter and a longer part.

The module-side support structure can be designed as a sheet metal part, wherein the slot can be punched example. Of course, then an angle shape is possible.

If the rod-shaped element has a shorter and a longer part, the length of the longer part is preferably so large that the longer part abuts against a stop when the rod-shaped element is rotated. In this way, the rod-shaped element is always fixed in the mounted state in a certain position and can for example be set so that it does not protrude from the system. So it can not be a trip hazard and is also protected by the module from the weather.

The shorter part has to fulfill two conditions: Firstly, it must be short enough to be able to still be guided through the slot with the fastening screw screwed in, without jamming. Therefore, its length must be smaller than the length of the slot. On the other hand, however, it must be long enough, even in the worst case, a sufficient contact surface next to the slot to provide, in order not to exceed the allowable surface pressure between the rod-shaped element and the material of the support structure to the slot.

The internal thread of the rod-shaped element and / or the external thread of the fastening screw are preferably designed to be self-locking. Due to the self-locking the rod-shaped element when turning the fastening screw for tightening after mounting is first taken through the slot until it abuts the stop or a counter-holder. In this way, the assembly is facilitated because the rod-shaped element no longer needs to be held.

Particularly simple self-locking of the thread can be done by a slight deformation of the inner or outer thread. Such a deformation can be done, for example, by a marking of the internal thread or otherwise defined deformation of the internal thread or a careful clamping of the external thread, for example in a vice or a pair of pliers. Thereby, a slight deformation of the threaded surfaces can be effected, which leads to the desired inhibition.

For the fastening screw certain torques are prescribed depending on their strength and their diameter. In conventional assembly, these are either applied (with tight tolerances) by tightening with a torque wrench or (in the case of large tolerances) by means of wrench experience and force. Ergonomically designed wrenches for certain threads now generally have a length that is so suitable for the thread that the torque that matches the thread is achieved with a minimally expectable force applied by a fitter to the end of the wrench. Now, if the longer part of the rod-shaped element also has a correspondingly adapted length, and this rod-shaped element can be used for tightening, with the screw is held against. As a result, a required tightening torque can be determined within certain limits during assembly by proper choice of the length of the long part of the rod-shaped element without additional tools.

This system as described above can in principle be anchored to the base, for example a roof, in a conventional manner. However, the connection arrangement is particularly preferably provided with one or more elongated holes in order to connect the module-side support structure to the anchoring. By means of these slots an adjustment of the supporting structure is then possible with a fixed anchoring, so as to compensate for the anchorage resulting assembly tolerances.

Particularly preferably, the elongated holes are connected to one another on the ground surface anchoring and run in different directions, for example perpendicular to one another. For example, they are designed T-shaped. In this way, just before the final tightening the position of the module clamp and thus the position of the module can be changed without having to completely unscrew a screw, for example. Thus, the assembly is simplified.

The connection arrangement can be connectable with several anchorages at the same time. For example, it may have a bridge shape. As a result, a particularly stable construction is achieved. In this bridge shape, the slot can be arranged in the middle between the two bridge parts. A generally mirror-symmetrical arrangement (for example with a multi-arm, eg star-shaped "bridge") is also possible. Such an arrangement is generally more stable than anchoring in one place only and, from this point of view, particularly advantageous for weaker substructures on which the system is to be anchored.

The anchoring or anchorages may for example be listed so that they have through holes through which they are bolted to the base. In the case of several anchoring elements, a clamping action can also be achieved between them if the base surface has elements which are suitable for a corresponding jamming. Of course, methods such as the bonding already mentioned in the discussion of the prior art may also be used. Finally, a combination of several such methods is possible with each other and with other conventional fastening methods in general and not only in this specific embodiment.

If appropriate slots are provided in the connection arrangement and in the anchors, the adjustment is facilitated. Particularly preferred are elongated holes in the connection arrangement and associated elongated holes in the anchoring to each other vertically arranged so that a displacement of the connection arrangement for anchoring in two mutually perpendicular directions is possible. In addition, it can be useful, in particular if the connection arrangement has a plurality of separate and mutually perpendicular elongated holes, to provide two overlapping slots in the anchoring. This way, depending on the Mounting situation are chosen in each case the matching slot of the connection assembly, while in the anchorage only one hole is provided, in which the mounting screw can move in two directions. As a result, the attachment of the module-side support structure is facilitated to the anchoring, because only on a component in advance to select between different insertion holes. Of course, an analogous solution with several separate, perpendicular to each other elongated holes in the anchorage and interconnected slots in the connection setup is possible.

Particularly preferred for anchoring a trapezoidal sheet metal shoe is used. Trapezoidal sheet metal shoes are in particular for anchoring components on a roof usual anchoring means, which can also be used in the present task. Due to the flexibility of the system according to the invention, cost-effective anchoring is possible with such trapezoidal sheet metal shoes.

The system is provided for mounting module-shaped components, in particular of solar modules, on a base. Solar modules are available in various embodiments, namely with and without frame. Frameless solar modules have the advantage that the usable area for the conversion of solar energy increases because the frame shield a part of the sunlight. In addition, the frames themselves are a cost factor. Disadvantage of the frameless modules is that the processing is more difficult, because the risk of breakage, in particular the risk of chipping the edges increases. In addition, due to their strength, the frames may at least partially intercept and deflect deformation from loads applied over the module clamps and dissipate them from the modules. Therefore, frameless modules must be mounted more carefully as well as protected from deformation after assembly.

In particular, on "soft" roof surfaces such as sheet metal roofs, for example, already deformed under the load of a fitter, chimney sweep, etc., or by thermal expansion, this can cause frameless modules break if they were firmly clamped like framed modules in a conventional manner , Therefore, elastomers are commonly used in module clamps for frameless modules to provide a margin to compensate for deformations. Terminal shell and terminal base remain immobile to each other once they are bolted together and thereby hold the module. The elastomers also increase the static friction between the clamp and the module.

According to the invention, the present system is supplemented by a module clamp, which holds the modules safely and yet provides greater latitude for deformations. The module clamp has a resilient element such as a screw or plate spring, which presses the terminal upper part against the terminal base and thus builds up a predefined spring force. If the substrate now deforms as described above, according to the invention, the module clamp can temporarily open against the spring force by a predetermined amount in order to absorb the stress on the module. Due to the spring tension, the clamp secures the element again as in the original state as soon as the deformation decreases. The spring tension is chosen so that the module is held securely, without the risk of breakage.

Particularly preferably, the module terminal in addition to the upper terminal part and the lower terminal part on a sleeve which passes through the upper terminal and is seated on the terminal base. Through the sleeve then a screw with a seated under the lower part nut, preferably a nut according to the fastening system according to the invention, screwed. As a result, the sleeve is firmly attached to the terminal base. The terminal shell is now held by a spring supported on the screw head on the lower part. Because with the same sleeve length and the same spring thus the clamping force is always set the same, care must be taken during the installation on the adjustment of the spring force. This simplifies the assembly.

Although it is spoken of a screw, of course, a corresponding other connection, for example, a quick-release connection can be used. The decisive factor is only the application of a defined spring force between Modulober- and lower part via a specially designed spring member.

In order to use the module clamp according to the invention in larger numbers and thus to be able to produce more economically, it is also conceivable vorzuhalten an intermediate piece which can be inserted between the upper part and lower part and holds them in a predetermined distance. This predetermined distance can then be chosen so that framed solar modules without suspension or with a pre-defined smaller spring travel and higher spring force between the upper and lower part with the same module terminal can be clamped. Thus, with the same upper and lower parts, a mounting of frameless and framed solar modules done.

If the spring travel is selected according to a difference in thickness between framed and frameless modules, the Screw for clamping the modules and the sleeve for supporting the screw or the intermediate piece for both cases are made equal. This can increase the number of units and thus the production of the components are more economical.

Advantageous developments can be found in the subclaims.

Although, in view of the mode of operation for which the system was developed, there is talk of mounting modules, especially photovoltaic modules, on a roof, the invention is not limited thereto. The invention can generally be used to fasten elements such as cladding for facades, billboards or the like with the least possible effort resiliently or firmly on or on a mounting surface.

The mounting system of such modular design has the advantage that the simplified assembly can be partially achieved even if instead of all the above-mentioned inventive parts such as ground surface anchoring, rod-shaped element, fastening screw and module clamp, only certain such parts are used together with conventional parts.

In particular, can be dispensed with the use of the inventive system on the use of previously customary rails, resulting in a material savings and a significant reduction in assembly time, because with less effort than conventional fasteners compensation of tolerances can be created.

The system according to the invention and the associated individual parts are described in more detail below with reference to an exemplary embodiment shown in the accompanying figures. Show in detail

1 an exemplary assembly of the system in a front view,

2 an exemplary assembly of the system after 1 in a side view,

3 an exemplary assembly of the system after 1 in a plan view,

4 an exemplary stop angle for use in a system according to 1 in an isometric view,

5 and 6 each a left or right wing of a Trapezblechblechschuhs as an example of an attachment of the fastening system to a roof,

7 a rod-shaped fastening element of the system according to the invention,

8th a module clamp according to the invention in the assembled state and

9 a module clamp according to the invention in exploded view.

1 shows a front view of a preferred embodiment of the system according to the invention for mounting a solar module. From top to bottom you can see a module clamp 40 , a shooting angle 10 as an example of a module-side support structure, in this view laterally beyond the receiving angle protruding nut 20 as a rod-shaped fastener and one of two wings 30A and 30B existing trapezoidal sheet metal shoe for anchoring to a base. The following will be the reference number for the trapezoidal sheet metal shoe 30 used when the two wings together or an equivalent attachment of the system to a roof is meant.

In contrast to conventional fastening systems, the use of rails is dispensed with in the system according to the invention. Instead, depending on the size of the modules to be fastened, several individual systems as in 1 shown used. For example, to attach a single rectangular solar module with eight such systems (two each on each peripheral side of the module) are used. Furthermore, a module clamp according to the invention, as can be seen from 2 can be seen more clearly, a module or two modules (in 2 on the right and left side of the clamp 40 ) at the same time. In this regard, the terminal of the invention differs 40 not essential of prior art module clamps.

Like from the 1 and 4 to 6 becomes clear, the shooting angle 10 and the right and left wings 30A and 30B several oblong holes in the areas where they like in 1 be assembled together. There are each a slot for mounting 12 or 13 in the recording angle 10 and a slot 35A . 35B in a wing 30A . 30B of the trapezoidal sheet metal shoe 30 superimposed and assembled the receiving angle and the wing, for example via a screw-nut connection. Due to the slots is thereby a shift in the recording angle 10 opposite the two wings of the trapezoidal sheet metal shoe 30 and to adapt to the respective roof merging the two wings of the trapezoidal sheet metal shoe possible to the To fix the mounting angle on the roof. In principle, of course, other joining methods such as riveting, soldering, gluing or welding, can be used, with which the receiving angle and the trapezoidal sheet metal shoes are aligned with each other.

Although this is not shown, in each of the wings 30A . 30B of the trapezoidal sheet metal shoe 30 , which forms part of the anchoring, through holes may be provided to secure the section to the roof. This attachment is possible in principle with a known method such as screws, rivets, gluing, welding, etc. Through the slots on both the wings of the trapezoidal sheet metal shoe 30 as well as at the intake angle 10 is then a simple compensation of possible assembly inaccuracies in the attachment to the trapezoidal roof possible. In particular, by way of example in 5 and 6 shown T-shaped slots in the wings and a height adjustment of the receiving angle 10 to the trapezoidal sheet metal shoe 30 possible.

In addition to the in 1 shown attachment of the two wings of Trapezblechblechschuhs 30 in the substantially horizontally extending oblong holes 12 in the recording angle 10 can at the shooting angle shown in the case of a particularly close clamping distance between the two wings of the trapezoidal sheet metal shoe and at least one of the wings with the vertical position in the installed state slot 13 be screwed. In this case, over the T-shaped slot in the corresponding wing 30A . 30B an adjustment of the recording angle done.

Furthermore, unless, as in most cases, grounds for stability do not oppose it, it would be possible, instead of the one in 1 and 3 shown attachment of the receiving angle to a trapezoidal sheet metal shoe from two wings 30A . 30B attach the mounting bracket to only one wing.

In addition to the previously discussed in connection with the attachment to the roof oblong holes in a first, in the assembled state substantially perpendicular plate-shaped part 10A has the recording angle according to the invention 10 a substantially parallel to the roof plate-shaped part 10B on, which is spaced in the assembled state of the roof over the vertical plate and the trapezoidal sheet metal shoe.

In this part 10B is a slot 11 introduced, the attachment of a module clamp described in more detail later 40 with a mother 20 to 7 and a fixing screw 22 interacts.

The mother 20 in this embodiment, a rod-shaped member having a length, width and thickness having an internal thread in the thickness direction. The width and thickness of the nut are the width of the slot 11 so matched that the mother 20 with a small clearance through the slot 11 feasible without tilting during insertion. For example, the width of the nut may be about one to five tenths of a millimeter less than the width of the slot. Of course, the width of the nut is dependent on the diameter of the internal thread to choose sufficiently large to ensure adequate stability.

As seen from the assembly views of 1 to 3 becomes clear, divided the internal thread (in the 1 to 3 in the middle below the module clamp 40 ) the mother 20 in the embodiment in a longer part 20A and a shorter part 20B ,

The relative lengths of the shorter and the longer part of the nut 20 depend on the dimensions of the acceptance angle as follows 10 from: the longer part 20A the mother is at least so long that the mother even with a rotation in the assembled state on the plate-shaped part 10B the angle of attack 10 strikes when the associated screw 22 in the furthest from the plate-shaped part 10B distant end of the slot 11 passes through the slot. Thus, the longer part prevents 20A if the mounting is correct, the nut will "spin" 20 by being on the part 10A of pickup angle strikes. The length of the longer part is limited to the top only by economic considerations, for example, in terms of material consumption. Too long a part 20A For example, it could make handling on the site more difficult. In a particularly preferred embodiment, the length of the longer side of the nut corresponds to a length of a wrench suitable for the thread dimension. As a result, it is possible to dispense with the use of a wrench during assembly because the nut can be applied with the torque that is applied ergonomically by means of a conventional wrench.

The length of the shorter part 20B the mother is determined by the following two boundary conditions:
In any situation in the attracted state, especially if the long side 20A the mother in any position on the plate-shaped part 10A strikes, the short side must 20B at least as far beyond the edge of the slot 11 Beyond that, the surface pressure between mother 20 and shooting angles 10 is still tolerable on this short side. This results in the minimum length of the shorter part 20B , If, as shown Embodiment, the stop by the angle 10 itself is formed and at the same time the module clamp 40 at the vertical part 10A the shooting angle 10 sitting far end, leaving the screw 22 is near the end of the slot through the slot goes, the angle that the mother takes against the slot, relatively acute, so that only a minor part of the width of the nut rests on the edge of the slot. The length of the shorter part of the nut must be chosen so long that the surface pressure in this worst case does not become too large. The maximum possible length of the shorter part will be discussed later. If the stop is near the center of the slot next to the slot 11 arranged, the mother is in any position at a less acute angle to the slot on the edge of the slot in comparison to the case in which the stop is located near one end of the slot, resulting in a larger overlap between the edge of the slot Long hole and the mother and thus should result in a lower surface pressure. Therefore, the length of the shorter part of the nut by suitable design of the stop at the receiving angle 10 to be influenced.

The largest permissible length of the short side results from the fact that it is provided during assembly of the module according to the invention that the mother in the screwed loose with the module clamp state obliquely through the slot 11 inserted, then parallel to the upper part 10B of the receiving angle and finally when tightening the screw 22 in the mother 20 against the vertical part 10A strikes. In particular, to allow insertion in this way, the square root of the squares of length and thickness of the shorter part must (according to the theorem of Pythagoras) 20B be smaller than the clear length of the slot. As an example, for example, has a milled slot 11 in the recording angle 10 in which the radii of the round ends of the oblong hole 11 correspond to the radius of the milling head, the length of the shorter part be so much shorter than the travel length of the milling cutter in the production of the oblong hole, that the root of the sum of the squares of the thickness and the length of the shorter part of the nut is smaller than the travel length of the milling cutter is. This eliminates longitudinal tilting in this type of insertion. Particularly preferably, in particular, the short end of the nut can be rounded in order to ensure even easier insertion.

The parts of the fastening system according to the invention which have been discussed above by way of example with reference to the embodiment can, in principle, be used to connect a conventional module clamp for frame modules or frameless modules to a support structure known from the prior art.

These parts can particularly preferably be equipped with a module clamp according to the invention 8th and 9 as explained below.

In the 8th and 9 shown module clamp 40 for frameless modules first points next to a terminal shell 40A , a terminal base 40B and a fixing screw 22 with a slice 22A which, as in the prior art, has a nut 20 , which is formed here according to the invention as a rod-shaped fastening element, brace the upper and lower parts against each other and thus ensure the clamping of the modules, a sleeve 42 on the bottom of the clamp 40B rests and through the terminal shell 40A goes. In this way you can tighten the screw 22 on the sleeve 42 so that the screw (along with the disc 22A ) with the mother 20 over the sleeve 42 and the terminal base is braced, the lower part 40B the module clamp 40 relative to the support structure discussed above, as defined in the prior art. In contrast, the upper part 40A the module clamp 40 on the sleeve 42 in the structure according to the invention mounted movably in a direction up and down. The required clamping force between the upper and lower part is via a spring arrangement 45 between the shell 40A and the head of the fixing screw 22 (or the disc 22A , which is supported on this head) applied, here from a coil spring 45 exists, but may also consist of an elastomer or a disc spring package. The clamping force is adjusted by means of the spring so that it is smaller than a force at the occurrence of frameless modules can break.

In summary, the invention provides the following:
An element for improved connection of a support structure for a plate-shaped module with a substructure is provided. A rod-shaped fastener with an introduced transversely to its longitudinal direction internal thread is in advance with a mounting screw for attaching a module clamp, which preferably has a spring-mounted upper part against the upper part, screwed and pushed in this state through a slot provided for this, by means of an anchoring to a Base is attached. The fastener rotates when tightening the screw against the slot, so that the support structure is supported via the fastener at the edge of the slot against the force exerted by the screw pressure force. Particularly preferably, the fastener is supported after twisting from the insertion position in the direction of rotation of a stop on the support structure.

LIST OF REFERENCE NUMBERS

1

Plate-shaped module

2

Floor space

10

acceptance angle

10A

vertical plate-shaped part of the receiving angle

10B

horizontally standing plate-shaped part of the receiving angle

11

Long hole in the part 10B

12

Slot (vertical slot) in the part 10A

13

Slot (horizontal slot) in the part 10A

20

Rod-shaped element (nut)

22

fixing screw

22A

disc

30

Fastening element (trapezoidal sheet metal shoe)

30A

Fastening element (left wing of trapezoidal sheet metal shoe)

30B

Fastening element (right wing of trapezoidal sheet metal shoe)

35A

Cross-shaped slot in the left wing

35B

Cross-shaped slot in the right wing

40

module clamp

40A

Clamping shell

40B

Clamp base

42

shell

45

Spring arrangement (coil spring)

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 102004009935 [0003]
• DE 202008011312 U1 [0004]
• DE 202004015811 U1 [0005]
• DE 202009011708 U1 [0006]

Claims (31)

System for the spaced attachment of a module or a plurality of modules, in particular a solar module, to a base, in particular to a trapezoidal roof, with a ground surface anchoring, and a module-side support structure which is connected via a screw with the anchorage, with a connection arrangement between anchoring and support structure which has a fixing screw ( 22 ) and characterized in that it comprises: a slot ( 11 ) predetermined length, width and depth and a rod-shaped element ( 20 ) predetermined length, width and thickness with a running in its thickness direction, the fastening screw ( 22 ) receiving threaded bore, wherein the rod-shaped element in terms of its length, width and thickness in such a way to the slot ( 11 ) is adapted to be in a state in which it is connected to the fixing screw (16) held on the module-side supporting structure ( 22 ) is screwed through the slot is feasible. The system of claim 1, wherein the connection arrangement is an angle ( 10 ). A system according to claim 1 or 2, wherein the connection arrangement comprises a stop for the rod-shaped element ( 20 ) having. A system according to claims 2 and 3, wherein a part ( 10A ) of the angle as a stop for the rod-shaped element ( 20 ) serves. System according to one of the preceding claims, characterized in that the connection arrangement comprises a sheet metal part. System according to one of claims 1 to 5, wherein the threaded bore of the rod-shaped element ( 20 ) divides into a shorter and a longer part. A system according to claim 6 when dependent on claim 3, wherein the length of the longer part of the rod-shaped element ( 20 ) is selected at least so long that the rod-shaped element ( 20 ) in each position of the fixing screw in the slot ( 11 ) upon rotation of the rod-shaped element ( 20 ) pushes its thread less than 360 ° to the stop. System according to claim 6 or 7, wherein the length of the shorter part is chosen so short that the rod-shaped element with screwed-in fastening screw completely from the module side through the slot ( 11 ) is pluggable. System according to one of claims 6 to 8, wherein the length of the shorter part is chosen so long that the shorter part of the rod-shaped element ( 20 ) after tightening the fastening screw in each position covers a sufficient area at the edge of the oblong hole to a permissible surface pressure between the rod-shaped element ( 20 ) and the edge of the slot should not be exceeded. System according to one of the preceding claims, characterized in that either the internal thread of the rod-shaped element ( 20 ) or the external thread of the fixing screw is self-locking. The system of claim 10, wherein the self-locking is performed by tapping the internal thread or otherwise defined deforming in the vicinity of the internal thread. System according to one of the preceding claims, characterized in that the longer part of the rod-shaped element ( 20 ) has the length of a matching to the diameter of the internal thread wrench. A system according to any one of the preceding claims, further comprising a fastener ( 30A ) of the ground surface anchoring, which is a slot ( 35A ) for fastening the module-side supporting structure ( 10 ) such that the module-side support structure ( 10 ) relative to the fastening element ( 30A ) is mountable in different positions. System according to claim 13, wherein one or more fastening elements ( 30A . 30B ) of the ground surface anchoring at several oblong holes ( 12 . 13 ) of the module-side support structure ( 10 ) are fastened. The system of claim 14, wherein the plurality of elongated holes extend at least partially in different, preferably mutually perpendicular, directions. System according to one of the preceding claims, wherein the connection arrangement ( 10 ) is formed as a bridge, which is fastened in two places on a ground surface side anchoring, and wherein the elongated hole ( 11 ) is arranged between these two locations. A system according to any one of claims 13 to 16, wherein each fastener ( 30A ) is anchored via through holes on the base. System according to one of the preceding claims, wherein the connection arrangement ( 10 ) is constructed mirror-symmetrically. System according to one of the preceding claims, wherein the fastening element ( 30A . 30B ) several slots ( 35A . 35B ) having. The system of claim 19, wherein two of the elongated holes of the fastener ( 30A ) intersect one another to form an X or T-shaped hole ( 35A . 35B ) in such a way that a bidirectionally adjustable fastening of the connection arrangement to the fastening element ( 30A ) is possible. System according to one of claims 13 to 20, characterized in that the fastening element ( 30 ) of two in the assembled state opposite parts ( 30A . 30B ), which cooperate in such a way that they embrace a bulge of the base surface, and the two opposing parts ( 30A . 30B ) Apply a clamping voltage on the bulge. System according to one of claims 13 to 21, characterized in that the fastening element ( 30 ) a trapezoidal sheet metal shoe or a pair of trapezoidal sheet metal shoe wings ( 30A . 30B ). Clamp ( 40 ) for holding a module for a system according to one of the preceding claims, with a clamping upper part ( 40A ), a terminal lower part ( 40B ) and an arrangement ( 20 . 22 . 22A . 42 . 45 ) for compressing terminal shell ( 40A ) and terminal lower part ( 40B ), characterized in that the arrangement for compressing a resilient element ( 45 ), which has a predefined spring travel from the upper terminal part ( 40A ) and terminal lower part ( 40B ) against each other. Clamp ( 40 ) according to claim 23, wherein the clamping upper part ( 40A ) has a first through hole for the device for compressing, the lower clamping part ( 40B ) has a second through hole for the squeezing device, wherein the second through hole is smaller than the first through hole such that a part ( 42 . 45 ) of the arrangement ( 20 . 22 . 42 . 45 ) for squeezing only through the first through hole. Clamp ( 40 ) according to claim 24, wherein the part not fitting through the second through-hole comprises a sleeve ( 42 ). Clamp ( 40 ) according to one of claims 23 to 25, wherein the resilient part ( 45 ) on one part ( 22 ) of the arrangement for compression and on the terminal shell ( 40A ) is supported. Clamp ( 40 ) according to claim 26, wherein the resilient part ( 45 ) is a coil spring, a plate spring, a disc spring package or an elastomer buffer. Clamp ( 40 ) according to claim 26 or 27, wherein the resilient part ( 45 ) on a screw belonging to the compression device ( 22 ) is supported. Clamp ( 40 ) according to one of claims 23 to 28, wherein the spring force is adjustable during assembly. Clamp ( 40 ) according to any one of claims 23 to 29, wherein the length of the resilient member corresponds to a thickness difference between clamped framed and frameless modules therewith. System according to one of claims 1 to 22 with a clamp ( 40 ) according to any one of claims 23 to 30.

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