Fastening system for mounting solar modules

Abstract

The invention relates to a profile rail, a clip holder, a cross-connector and an attachment system for mounting solar modules. The components are so designed and matched to each other that solar modules in many variations can be mounted quickly and easily and with the components having a low weight.

Claims

1. A profile rail for an attachment system for solar panels comprising, in a cross-sectional view: a support surface forming a bottommost side comprising a horizontal bottommost surface extending continuously an entire width of the profile rail, a first and a second receiving space, each having a lateral opening configured to receive a cross-connector of the attachment system, said openings facing in opposite directions, a third receiving space in the form of a T-slot having an opening facing away from the bottommost side of the profile rail, said opening being defined by two webs facing each other which are mirror-symmetrical and which each has a crank inwards at its respective free end, said third receiving space configured to receive a clip holder of the attachment system, a first rectangular, central hollow space, enclosed on all sides, which is defined by the support surface and by the first, second and third receiving space, and a first and a second hollow lateral space, enclosed on all sides, arranged on opposite sides of the third receiving space and each adjoining one of the first and second receiving spaces.

2. The profile rail according to claim 1, wherein the height of the first central rectangular hollow space above the support surface is greater than the height of the first and the second receiving space above the support surface, such that the first central hollow space overlaps the first and the second lateral hollow space on either side.

3. The profile rail according to claim 2, wherein the first and the second receiving space each being in the form of a T-slot.

4. The profile rail according to claim 3, having lateral external walls which have a toothed profile in whole or in part.

5. The profile rail according to claim 1, wherein the first and the second receiving space each being in the form of a T-slot.

6. The profile rail according to claim 1, having lateral external walls which have a toothed profile in whole or in part.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Other features and advantages shall become obvious from the following embodiments described below with reference to the Figures, in which:

(2) FIG. 1 shows a profile rail according to the first aspect of the invention,

(3) FIG. 2 shows a clip holder according to the second aspect of the invention,

(4) FIG. 3 shows a section of an attachment system according to the fourth aspect of the invention,

(5) FIG. 4 shows another section of an attachment system according to the fourth aspect of the invention,

(6) FIG. 5 shows another section of an attachment system according to the fourth aspect of the invention and

(7) FIG. 6 shows yet another section of an attachment system according to the fourth aspect of the invention.

DETAILED DESCRIPTION

(8) FIG. 1 shows a profile rail 100 for mounting solar modules according to the first aspect of the invention. In FIG. 1a, profile rail 100 is shown in a cross-sectional view, in FIG. 1b in a side elevation view. Profile rail 100 has a support surface 110 forming a bottom side of the profile rail. Above said support surface, a first receiving space 120 and a second receiving space 130 are arranged, each of which having a lateral opening 121 and 131 and being embodied in the form of a T-slot. A first rectangular central hollow space 140 is disposed between the first and the second receiving space 120, 130 above support surface 110. This hollow space serves to provide stability to the profile rail as a whole, while at the same time minimizing the weight, and connecting members such as telescopic connectors can be attached inside the hollow space. A first lateral hollow space 150 or second lateral hollow space 160 is formed above the first and second receiving space, respectively. Above the first central hollow space 140 and between the first lateral hollow space 150 and the second lateral hollow space 160, a third receiving space 170 is provided in the form of a T-slot. The third receiving space 170 has an opening 171 which faces away from the bottom side of the profile rail, said opening being defined by two webs 172, 174 which are mirror-symmetrical relative to a mentally conceived center plane and which each have a crank 173, 175 at their respective free end. By designing the third receiving space in the form of a T-slot, and providing the webs which define the opening with cranks, the profile rail is suitable not only for receiving clip holders according to the invention, but also for receiving standard connectors.

(9) As the height of the central hollow space 140 above the support surface is greater in the embodiment shown here than the height of the first and the second receiving space 120, 130, the first and second lateral hollow spaces 150, 160 are also adjacent the first central hollow space. The bottom walls 181, 182 of lateral hollow spaces 150, 160 and the bottom wall 180 of the third receiving space 170 are not in the same plane, therefore, so this arrangement results in greater stability of the profile rail.

(10) It can be seen from both FIG. 1a and FIG. 1b that the lateral external walls of profile rail 100 are provided with a toothed profile. This profile can prevent any slippage of components during mounting, or at least impede such slippage.

(11) FIG. 2 shows an embodiment of a clip holder 200 according to the second aspect of the invention. FIG. 2a shows the clip holder in the plan view. In FIG. 2b, clip holder 200 is shown in a side view. The clip holder has a head plate 210 which has a threaded hole 220, said head plate being square in shape in this embodiment. Due to the square shape of the head plate, the profile rails can be arranged in a particularly advantageous manner at an angle of 90 to the solar modules, and also in the joint between two modules, as shown in more detail in FIGS. 3 and 5. Two legs 230, 240 are disposed at the sides of head plate 210. At their respective ends facing away from the head plate, the legs have hooks 235, 245 which are designed to engage cranks in the profile rail. In the embodiment shown, said hooks 235, 245 slope inwards to an inner side of the respective leg by an angle of 15 to the horizontal. Such clip holders 200 can be inserted with slight pressure into the profile rail according to the invention and can still be moved therein. A web 250, 260 is provided on the inner side of each leg 230, 240. If, in the mounted state, a screw extending to webs 250, 260 has been inserted into the clip holder, the clip holder can be prevented with the aid of the webs from being pressed together.

(12) FIG. 3 shows part of an attachment system 300 according to the fourth aspect of the invention, in which the attachment system 300 as a whole has a plurality of profile rails and a plurality of clip holders. A clip holder 200 is attached here in a third receiving space 170 of a profile rail 100. The hooks at the ends of the clip holder legs engage the cranks of the webs which define the opening of the third receiving space. The hooks are complementary in shape to the cranks. A retention member 310 for holding two adjacent solar modules is fastened to clip holder 200 by means of a screw 320. Solar modules 330, 331 are securely mounted on profile rail 100 by means of retention member 310 and by tightening screw 320. With this attachment system, the solar modules can be placed on the profile rails and then fixed in place by clipping the clip holders into the profile rails. This allows quick and easy mounting.

(13) FIG. 4 likewise shows a part of attachment system 300. In this part of the attachment system, a retention member 315 for only one solar module is used instead of a retention member for holding adjacent solar modules, such a retention member also being referred to as an end retention member. In this side view, end retention member 315 consists of two L-shaped members, the short leg of the first L-shaped member 316 being formed on the long leg of the second L-shaped member 317. The end retention member encloses with the first L-shaped member 316 a clip holder 200 and is fastened thereto by means of a screw 321. Solar module 330 is held in place and pressed against profile rail 100 by means of the second L-shaped member 317. Clip holder 200 is mounted, in turn, in the third receiving space of profile rail 100. With the aid of the end retention member, the last solar modules in a row can be attached to the profile rails. As a comparison with FIG. 3 shows, screws of different length, adapted to the module height and location within the attachment system, can be used on the inventive clip holder. However, it is also possible with the clip holder according to the invention to attach solar modules of any standard frame height using one screw length, thus obviating the need for the fitter to have many different screws.

(14) FIG. 5 shows a part of an attachment system 301, in which profile rail 100 is arranged at an angle of 90 to solar module 330. This arrangement is common in photovoltaic systems. In this case also, solar module 330 is mounted with the aid of the clip holder on profile rail 100 using an end retention member 315.

(15) FIG. 6 shows another part of attachment system 300 in FIG. 3. In this case, a second profile rail 101 is additionally mounted perpendicular to the first profile rail 100. This is done with the aid of a cross-connector 400, the first L-shaped extension 410 of which is received in the first receiving space of the first profile rail 100. Cross-connector 400 and thus the first profile rail is fasten via the second L-shaped extension 420 by a screw 321 to clip holder 200. Clip holder 200, for its part, is inserted in the third receiving space of the second profile rail 101. Middle web 430 of the cross-connector abuts a toothed external wall of the first profile rail in a nonskid manner. In this way, a secure connection between profile rails arranged perpendicular to each other can be achieved quickly and easily.

(16) While there have been shown and described and pointed out fundamental novel features of the invention as applied to preferred embodiments thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices and methods described may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements and/or method steps shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto. Furthermore, in the claims means-plus-function clauses are intended to cover the structures described herein as performing the recited function and not only structural equivalents, but also equivalent structures. Thus although a nail and a screw may not be structural equivalents in that a nail employs a cylindrical surface to secure wooden parts together, whereas a screw employs a helical surface, in the environment of fastening wooden parts, a nail and a screw may be equivalent structures.

REFERENCE SIGNS

(17) 100, 101 Profile rail 110 Support surface 120 First receiving space 121,131 Lateral opening 130 Second receiving space 140 First inner hollow space 150 First lateral hollow space 160 Second lateral hollow space 170 Third receiving space 171 Opening 172, 174 Web 173, 175 Crank 180 Lower wall of the third receiving space 181 Lower wall of the second lateral hollow space 182 Lower wall of the third lateral hollow space 200 Clip holder 210 Head plate 220 Threaded hole 230, 240 Legs 235, 245 Hooks 250, 269 Web on clip holder 300, 301 Attachment system 310, 315 Retention member 316 First L-shaped member 317 Second L-shaped member 320, 321 Screw 330, 331 Solar module 400 Cross-connector 410 First L-shaped extension 420 Second L-shaped extension 430 Middle web