Fastening System for Mounting Solar Modules on a Trapezoidal Sheet

Abstract

A profile rail comprising in a cross-sectional view: a base plate which forms a bottom side of the profile rail and which is flat in sections or completely flat; a first and a second receiving cavity for a rail support which cavities are both partially closed laterally in outward direction and which respectively include a lateral opening, wherein the two lateral openings are oriented in opposite directions; and a third receiving cavity which includes an opening that is oriented away from the bottom side of the profile rail and which includes an inner profile for attaching module attachment elements.

1 . A profile rail comprising in a cross-sectional view:
 a base plate which forms a bottom side of the profile rail and which is flat in sections or completely flat;   a first and a second receiving cavity for rail supports which are both partially closed laterally in an outward direction and which respectively include a lateral opening, wherein the two lateral openings are oriented in opposite directions; and   a third receiving cavity which includes an opening that is oriented away from the bottom side of the profile rail and which includes an inner profile for attaching module attachment elements.   
     
     
         2 . The profile rail according to  claim 1 , wherein the first or the second receiving cavity is internally defined by a C-shape. 
     
     
         3 . The profile rail according to  claim 1 , wherein the first receiving cavity or the second receiving cavity is laterally closed partially in outward direction by at least one lateral bar arranged orthogonal to the base plate. 
     
     
         4 . The profile rail according to  claim 1 , wherein the second receiving cavity is mirror symmetrical to the first receiving cavity with respect to an imaginary center plane which is orthogonal to the base plate. 
     
     
         5 . The profile rail according to  claim 1 ,
 wherein the inner profile includes cranks at different walls or bars,   wherein the cranks extend substantially parallel to the base plate,   wherein a first crank has a greater distance from the base plate than a second crank, and   wherein the inner profile further includes a first and a second contact surface for an attachment element whose distances from the base plate are smaller than a distance of the first crank from the base plate.   
     
     
         6 . The profile rail according to  claim 1 , wherein the first contact surface and the second contact surface are parallel to the base plate. 
     
     
         7 . The profile rail according to  claim 5 ,
 wherein the first crank and the first contact surface overlap at least partially, or   wherein the second crank and the second contact surface overlap at least partially.   
     
     
         8 . The profile rail according to  claim 5 ,
 wherein the inner profile includes a bar that protrudes from a plane of the base plate,   wherein the bar is arranged between two inner walls of the profile rail that are arranged opposite to one another,   wherein the bar has a second crank at its end that is remote from the base plate, and   wherein the first crank is arranged at a first inner wall and oriented in the same direction as the second crank.   
     
     
         9 . The profile rail according to  claim 8 , wherein the bar is orthogonal to the base plate. 
     
     
         10 . The profile rail according to  claim 8 , wherein the first contact surface protrudes from the first inner wall. 
     
     
         11 . The profile rail according to  claim 8 , wherein the second contact surface is arranged at the end of the bar that is remote from the base plate. 
     
     
         12 . An attachment system for mounting solar modules on a trapezoidal sheet which includes raised beads and associated flanks, comprising
 at least one profile rail according to  claim 1 ; and   a plurality of rail supports respectively including   a main element,   a first clearance hole through the main element, and   a T-shaped component extending from the main element,   wherein the profile rail is attachable at the raised beads via the rail supports,   wherein the T-shaped components engage the lateral openings respectively of the first or the second receiving cavity and with attachment of the rail supports at the flanks via attachment devices through clearance holes,   wherein the top sides of the main elements of the rail supports do not protrude beyond a top side of the profile rail in assembled condition.   
     
     
         13 . An arrangement for attaching solar modules with an attaching system according to  claim 12  and a trapezoidal sheet which includes raised beads and associated flanks,
 wherein the profile rail rests on the raised beads, 
 wherein the rail supports are attached with attachment devices through their clearance holes at the flanks of the raised beads of the trapezoidal sheet, and 
 wherein the T-shaped components of the rail supports either engage a respective lateral opening of the first or the second receiving cavity of the profile rail. 
 
     
     
         14 . A method for mounting an attachment system according to  claim 12  on a trapezoidal sheet which includes raised beads and associated flanks, the method comprising the steps:
 a) placing the profile rail with its bottom side on raised beads of the trapezoidal sheet; 
 b) inserting the T-shaped element of one of the rail supports into one of the receiving cavities of the profile rail; 
 c) attaching the rail support at one of the flanks with an attachment device which extends through a clearance hole of the rail support; 
 d) repeating steps b) and c) at least once with respectively one further rail support. 
 
     
     
         15 . A method according to  claim 14 , wherein the rail supports are mounted on both sides of the profile rail.