Patent ID: 8172709

Claim:
A tensioning rail for tensioning or a guide rail for guiding a drive chain ( 6 ), comprising an opening ( 16 ) for receiving a retaining bolt ( 17 ) and a retaining bolt ( 17 ) which can be inserted into the opening ( 16 ), whereby a lock device working between the retaining bolt ( 17 ) and the opening ( 16 ) is provided with a lock projection ( 18 , 18 . 1 ) at the opening ( 16 ) and a lock recess ( 21 ) at the retaining bolt ( 17 ), or vice versa, which lock device secures the retaining bolt ( 17 ) in a mounting position relative to the opening ( 16 ) and at least temporarily releases the retaining bolt ( 17 ) in order to move it to a fixing position, the retaining bolt ( 17 ) having a insertion section ( 20 ) and a threaded section ( 19 ), both for insertion into the opening ( 16 ), the lock recess ( 21 ) is formed at the outer circumference of the insertion section ( 20 ) and the threaded section slightly projects out of the opening on one side of the tensioning or guide rail ( 7 , 8 ) in the mounting position to provide a threading aid.