Abstract:
The invention relates to a device for supporting at least one solar panel comprising a rectangular frame (R) that includes two opposite struts ( 1, 2 ). The disclosed device comprises at least two supporting elements (S 1 , S 2 ), each of which has a support bar ( 5 ), on one side (O) of which at least one first fastening element ( 6 ) for securing one ( 1 ) of the struts is provided. At least one support ( 7 ) is pivotally mounted on the support bar ( 5 ) at a specific distance from the first fastening element ( 6 ). The free end of said at least one support ( 7 ) includes a second fastening element ( 13 ) for securing the other one strut ( 2 ) lying opposite the one strut ( 1 ).

Description:
RELATED APPLICATIONS 
     The present application is National Phase of International Application No. PCT/EP2013/051375 filed Jan. 24, 2013, and claims priorities from German Applications No. 20 2012 001 369.6, filed Feb. 13, 2012; and No. 20 2012 004 333.1, filed May 3, 2012. 
     TECHNICAL FIELD 
     The invention relates to a device for supporting at least one solar panel. 
     BACKGROUND 
     Such a device is disclosed in WO 2011/054943 A1. The device comprises two support arrangements. Each of the support arrangements has a support bar, on one side of which a first fastening element is provided. The solar panel has a rectangular frame that includes two opposite struts. To set up the solar panel, the one strut is hung on the first fastening elements. Then, a pivoting support wall provided in the area of the other strut is folded out of a transport position into a support position and mounted, for example by means of screws or rivets, to second fastening elements that are also fastened to the support bar. Setting up the conventional solar panel requires fastening elements and a screwing or riveting tool. Apart from that, each type of support wall must have second fastening elements corresponding to it on the support bar. This makes its manufacturing expense relatively high. 
     The goal of the invention is to eliminate the disadvantages of the prior art. In particular, a device should be specified that allows rapid, simple, and secure support of solar panels on an essentially horizontal base, for example a flat roof. Another goal of the invention is for the device to be universal, i.e., to allow the setup of different commercially available solar panels. 
     This is accomplished by the features of the present embodiment. 
     BRIEF SUMMARY 
     The invention proposes that the support bar has, pivotally mounted on it at a predetermined distance from the first fastening element, at least one support, whose free end has a second fastening element to fasten the other one strut lying opposite the one strut. 
     It is simple and economical to manufacture the proposed device. It is suitable for setting up many differently designed solar panels. 
     It is advantageous for the support to be a U-profile. The proposed support can support heavy loads, which can be caused by snow or wind, for example. 
     According to one embodiment, the U-profile has a base section and two legs opposite one another that extend away from the base section at a distance greater than the width of the support bar, so that when folded the U-profile partially surrounds the support bar. When folded to be transported, the proposed support arrangement has an especially low volume. 
     According to another embodiment of the invention, the U-profile&#39;s base section widens in the direction of its free end. I.e., in the area of the second fastening element the support is wider than it is at the support bar. This makes the device especially universal. In particular, it is also suitable to support solar panels that have a reinforcing element inserted in the corner area of the frame. 
     It is advantageous for each leg to have a pivot fastening section that extends over the U-profile&#39;s base section and that has a first opening. The opposite pivot fastening sections of a support lie against the side walls of the support bars. A fastening element, for example a rivet or something similar, is passed through the first opening, allowing the support to pivot about a pivot axis running through the first openings. 
     In an especially advantageous embodiment of the invention, the second fastening element is formed of fastening sections that extend over the U-profile&#39;s base section, each of which has a recess to engage into the other one strut. It is expedient for the recess to be designed so that it surrounds at least sections of the other one strut. 
     The struts can be made from an L-profile or of another U-profile and be arranged in such a way that frame legs of the opposite struts face one another, the recess being a slot corresponding to the frame leg. I.e., it is advantageous for the recess to be designed so that when the support swings it engages into the inward-facing free leg of the frame, securing the frame from being lifted off the support. Thus, in this case the solar panel is fastened, both with the first fastening element and also with the second fastening element, exclusively at the free frame legs of the opposite struts. This makes the device especially universal. In particular, no special fastening elements are provided, designed for different frame heights, for example. 
     It is expedient for one width of the slot to increase in the direction toward the slot opening. It is also expedient for at least one edge of the slot to have a radius. A suitable embodiment of the slot allows the support to latch with the frame leg or to be fastened by wedging it against the frame leg. This allows especially rapid and simple setup of the solar panel. In addition, the free end of the support can have a securing section that extends from the U-profile&#39;s base section and that is bent back in the direction toward the recess. The securing section is, e.g., a sheet metal tongue or tab. Bending the securing section back is a simple way to allow the support to be secured to the frame, i.e., it is then no longer possible for the support to be folded back in the direction of the support bar. Apart from this, the securing section can fix the frame or the frame leg of the other strut in the slot of the support&#39;s second fastening element. 
     It is advantageous for the support to have a second opening at its free end, preferably on the securing section. The second opening allows latching or frictional engagement of a second securing section. If the second opening is on the securing section, the securing section can be bent into a securing position simply by inserting a screwdriver, for example. 
     According to another embodiment, the U-profile&#39;s base section has two third openings. It is expedient for the supports of two support bars arranged next to one another to be connected with a connecting wall. It is expedient for the connection wall to have fourth openings corresponding to the third openings to allow fastening elements, in particular rivets, to pass through. The fourth openings can be drill holes and/or elongated holes. It is expedient for each of the third openings to have several fourth openings. This makes it easier to fasten the connection wall, especially if the underlying surface is not completely level. 
     Instead of the third and fourth openings, the supports&#39; base section can also have, for example, sheet metal tongues, into which corresponding sheet metal tabs or other slots on the connection walls can be frictionally engaged. 
     The connection wall can have a bent section parallel to its longitudinal edges that points away from the supports in the area of their free ends. It is advantageous for the bent section to form an acute angle with the supports. Consequently, there is a gap between an upper longitudinal edge of the solar panel and the bent section of the connection wall. The gap allows ventilation behind the solar panels, and thus cooling in the summer. 
     It is expedient for one length of the connection wall to correspond approximately to one length of the solar panel. The connection wall is intended to block wind. 
     According to another embodiment of the invention, the other side of the support bar facing away from the first side has elastomer elements on it, which are preferably extruded. The elastomer elements can be similar to a U-profile and partially surround the support bar on the sides. The elastomer elements can have an extended tongue on their fastening side. In this case, it is expedient for the support bar to have a groove on the other side to fasten the tongue. The support bar can be a square profile, preferably extruded. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A sample embodiment of the invention is explained in detail below using the drawing. The figures are as follows: 
         FIG. 1  a perspective view of the device; 
         FIG. 2  a perspective view of a support arrangement as shown in  FIG. 1 ; 
         FIG. 3  a side view of a support arrangement with the support folded in; 
         FIG. 4  the side view shown in  FIG. 3  with a support partly swung up; 
         FIG. 5  the side view shown in  FIG. 3  with a support completely swung up; and 
         FIG. 6  a top view of another support. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     In  FIG. 1 , a solar panel (not completely shown here for clarity) has a rectangular frame R with a first long strut  1  and a second long strut  2  opposite it, as well as opposite short struts  3 . Here, each of struts  1 ,  2 ,  3  is in the form of an L-profile, and the free frame legs  4  of opposite struts  1 ,  2 , and  3  each face one another. 
     Reference numbers S 1  and S 2  designate support arrangements. Each support arrangement S 1 , S 2  has a support bar  5  formed by a rectangular tube, for example. The top side O of support bar  5  has a first fastening element  6  mounted on it. A support  7  is pivotally mounted on support bar  5  at a specific distance from first fastening element  6 . Reference number  8  designates elastomer elements that are mounted on a bottom side U of support bars  5  and are secured by means of an adhesive, for example. 
     Support  7  is in the form of a U-profile, as is especially apparent in  FIG. 2 . It has a base section  9  and two opposite legs  10  extending away from the base section. Legs  10  both have pivot fastening sections  11  extending away from them that have a first opening  12 , through which fasteners (not shown here) pass to hold support  7  on support bar  5  in such a way that it can pivot. A first width B 1  of the U-profile&#39;s base section  9  near pivot fastening sections  11  is smaller than a second width B 2  near a free end of support  7 . Thus, U-profile&#39;s base section  9  has a trapezoidal shape. A fastening element  13  at the free end of support  7  comprises fastening sections  14 , which extend from legs  10 . Each fastening section  14  has a slot  15  that opens toward the U-profile&#39;s base section  9 . The free end of the U-profile&#39;s base section  9  also has a securing section  16  formed by a tab bent back by about 90° from base section  9 . Securing section  16  has a second opening  17 . Reference number  18  designates third openings in the U-profile&#39;s base section  9 . 
     First fastening element  6 , similar to second fastening element  13 , has other fastening sections  19 , each of which has another slot  20 . Fastening element  6  is mounted on the top O of support bar  5  in such a way with respect to support  7  that the other slot  20  opens in the opposite direction to slot  15 . Opposite each opening of the other slot  20  there is a support element  21 . Reference number  1  designates the first strut. 
     The function of the device will now be explained in detail, in particular using  FIG. 3 through 5 . 
     To set up a solar panel, first two support bars  5  are oriented parallel to one another at a suitable distance, so that first fastening elements  6  lie next to one another. Supports  7  are folded in, as shown in  FIG. 3 . Then, the one frame leg  4  of first strut  1  is inserted into the other slot  20  of first fastening element  6 . 
     After that, second strut  2  of frame R is raised. This makes first strut  1  lie against support element  21 . This keeps first strut  1  from moving in the direction in which support bar  5  extends. This is shown in  FIG. 4 . 
     Swinging support  7  up farther makes slot  15  engage in frame leg  4  of second strut  2 . In a suitable embodiment of slot  15 , the second fastening element  13  designed in this way latches with the second strut  2 . The latching can be secured by bending up the securing tab afterwards. 
     Finally, the connection wall, designated with reference number  22  in  FIG. 1 , can be fastened to two adjacent supports  7 . Connection wall  22  has fourth openings  23  for this purpose. Connection wall  22  also has a bent section  24 , so that when connection wall  22  is attached a gap  25  is formed between a lower edge of second strut  2  and connection wall  22 , allowing ventilation behind the solar panel. 
     Instead of first  6  and second fastening elements  13 , it is also possible for differently designed fastening elements to be provided, for example clamping, latching, or plug-type elements. 
     Instead of securing section  16 , it is also possible to use a conventional latchable securing element to keep support  7  folded out. Such a securing element can, for example, be inserted into or latched in second opening  17 . It can be a synthetic or elastomer element, for example. 
       FIG. 6  shows a top view of another support  25 . The other support  25  has another securing section  26 . The other securing section  26  in turn is essentially symmetrical and has a first tongue  27 , which has opening  17 . First tongue  27  has second tongues  28  on both sides of it, and the second tongues have third tongues  29  on both sides of them. The first  27 , second  28 , and third tongues  29  are all separated from one another by notches. First tongue  27  extends with a first depth in the direction of fastening section  14 , second tongues  28  extend with a second depth in the direction of fastening section  14 , and third tongues  29  extend with a third depth in the direction of fastening section  14 . The first depth is smaller than the second depth, and the second depth is smaller than the third depth. The proposed embodiment of the other securing section  26  allows differently designed second struts to be fastened by means of the other support  25 . For example, inserting a tool into second opening  17  also allows securing of second struts  2  that extend over the third tongues  29 , for example. In this case, such struts can be secured by bending up the first  27  and the second tongues  28 . Thus, the proposed other support  25  is universally suitable for fastening many commercially available solar panels. 
     It is advantageous for first fastening element  6  and support  7  to be made of laser-cut pieces of sheet metal whose edges are then broken. It is expedient for both first fastening element  6  and support  7  to be made of a single piece. 
     Especially  FIG. 1  shows how first fastening element  6  and second fastening element  13  each support one solar panel. However, the fastening element  6  and the second fastening element  13  each may support two adjacent solar panels. This makes the device especially efficient. It allows many solar panels to be set up with small installation and manufacturing expense. 
     Although the figures do not show this, it is possible for several first fastening elements  6  and supports  7  with second fastening elements  13  to be mounted in alternation on one support bar  5 . I.e., in this case one support arrangement S 1 , S 2  can be used to support several solar panels one behind the other, further improving the device&#39;s efficiency. 
     LIST OF REFERENCE NUMBERS 
     
         
           1  First strut 
           2  Second strut 
           3  Short strut 
           4  Frame leg 
           5  Support bar 
           6  First fastening element 
           7  Support 
           8  Elastomer element 
           9  U-profile base section 
           10  Leg 
           11  Pivot fastening section 
           12  First opening 
           13  Second fastening element 
           14  Fastening section 
           15  Slot 
           16  Securing section 
           17  Second opening 
           18  Third opening 
           19  Other fastening section 
           20  Other slot 
           21  Support element 
           22  Connection wall 
           23  Fourth opening 
           24  Bent section 
           25  Gap 
           26  Other securing section 
           27  First tongue 
           28  Second tongues 
           29  Third tongues 
         B 1  First width 
         B 2  Second width 
         O Top 
         R Frame 
         S 1  First support arrangement 
         S 2  Second support arrangement 
         U Bottom