Panel fastening system

1. A fastening system for a panel, comprising:

at least two mounting rails ( 1 ), each having a number of engaging open cavities formed therein; and

a number of engaging slide blocks ( 5 ), respectively engaging with the engaging open cavities; wherein the number of the engaging slide blocks ( 5 ) is two and the number of the engaging open cavities is two, and the engaging open cavities respectively are a first engaging open cavity ( 21 ) formed in a top surface of the mounting rail and a second engaging open cavity ( 23 ) formed in a side surface of the mounting rail;

wherein the panel ( 14 ) including a plurality of top frame strips ( 144 ) and a back frame ( 146 ) is disposed on the mounting rails and fixedly connected with the engaging slide blocks ( 5 ) respectively; and

the fastening system for the panel further comprises:

a middle clamp ( 10 ), including a top flange ( 109 ) which has two side lips ( 102 ) respectively formed on two ends thereof to engage with the top frame strips ( 144 ) for position limitation; a pair of vertical flanges ( 101 ) being under the top flange ( 109 ) and a flange support ( 108 ) disposed horizontally between the vertical flanges ( 101 ); wherein the middle clamp ( 10 ) is fixedly connected with one of the engaging slide blocks ( 5 ), which engages with the first engaging open cavity ( 21 ), via a fastening bolt ( 151 ); and

an L-shaped fastener ( 13 ), including a vertical flange ( 134 ) and a horizontal flange ( 135 ), wherein the vertical flange ( 134 ) is fixedly connected with the other engaging slide block ( 5 ), which engages with the second engaging open cavity ( 23 ), via a fastening bolt ( 153 ).

2. The fastening system for a panel as claimed in claim 1 , wherein:

a sliding open groove with a plane bottom ( 26 ) is formed in one side of the mounting rail ( 1 ) which is on the back side of the second engaging open cavity ( 23 ); and

the fastening system for a panel further comprises:

a back clamp ( 11 ), including a horizontal flange ( 114 ) and a vertical flange ( 115 ), a side lip ( 111 ) formed on each of the free ends of the horizontal flange ( 114 ) and the vertical flange ( 115 ); and

a bolt ( 155 ), having an end shape corresponding to the shape of the sliding open groove with a plane bottom ( 26 ) and slidably disposed in the sliding open groove with a plane bottom ( 26 ), wherein the vertical flange ( 115 ) and the bolt ( 155 ) are fastened and the horizontal flange ( 114 ) is fixedly connected with the back frame ( 146 ) via a bolt.

3. The fastening system for a panel as claimed in claim 2 , further comprising:

an end clamp ( 12 ), being -shaped and having a top flange ( 124 ), a vertical flange ( 125 ) and a horizontal flange ( 126 ) connected in turn, wherein the top flange ( 124 ) has a side lip ( 122 ) formed on the end thereof to engage with the top frame strip ( 144 ) for position limitation; the horizontal flange ( 126 ) is tightly connected with an engaging slide block, which is engaged with the first engaging open cavity ( 21 ), via a fastening bolt ( 159 ).

4. The fastening system for a panel as claimed in claim 3 , wherein:

the engaging slide block has two parallel grooves ( 51 ) formed in an upper surface thereof and two parallel recesses with inclined faces ( 52 ) or right-angled recesses ( 52 ′) formed in a lower surface thereof; and

each of the first engaging open cavity ( 21 ) and the second engaging open cavity ( 23 ) has a pair of protruding portions ( 211 , 231 ) engaged with the grooves ( 15 ) and a pair of parallel foot poles ( 213 , 233 ) which has a pair of feet with inclined faces ( 212 , 232 ) or right-angled feet ( 212 ′, 232 ′) formed on top ends thereof, and the pair of feet with inclined faces ( 212 , 232 ) or right-angled feet ( 212 ′, 232 ′) is engaged with the recesses with inclined faces ( 52 ) or the right-angled recesses ( 52 ′) of the engaging slide block.

5. The fastening system for a panel as claimed in claim 4 , wherein the panel ( 14 ) is a solar panel module.

6. The fastening system for a panel as claimed in claim 1 further comprising:

an end clamp ( 12 ), being -shaped and having a top flange ( 124 ), a vertical flange ( 125 ) and a horizontal flange ( 126 ) connected in turn, wherein the top flange ( 124 ) has a side lip ( 122 ) formed on the end thereof to engage with the top frame strip ( 144 ) for position limitation; the horizontal flange ( 126 ) is tightly connected with an engaging slide block, which is engaged with the first engaging open cavity ( 21 ), via a fastening bolt ( 159 ).

7. The fastening system for a panel as claimed in claim 6 , wherein:

the engaging slide block has two parallel grooves ( 51 ) formed in an upper surface thereof and two parallel recesses with inclined faces ( 52 ) or right-angled recesses ( 52 ′) formed in a lower surface thereof; and

each of the first engaging open cavity ( 21 ) and the second engaging open cavity ( 23 ) has a pair of protruding portions ( 211 , 231 ) engaged with the grooves ( 15 ) and a pair of parallel foot poles ( 213 , 233 ) which has a pair of feet with inclined faces ( 212 , 232 ) or right-angled feet ( 212 ′, 232 ′) formed on top ends thereof, and the pair of feet with inclined faces ( 212 , 232 ) or right-angled feet ( 212 ′, 232 ′) is engaged with the recesses with inclined faces ( 52 ) or the right-angled recesses ( 52 ′) of the engaging slide block.

8. The fastening system for a panel as claimed in claim 7 , wherein the panel ( 14 ) is a solar panel module.