Conveyor system comprising at least one belt frame , a) wherein the conveyor system extends in a conveying direction (X), a transverse direction (Y) orthogonal thereto and a vertical direction (Z) which is orthogonal to both directions (X, Y), and b) wherein the belt frame comprises at least two deflection elements, preferably pulleys, which are supported by a frame and which support an endless belt guided around the deflection elements, wherein the endless belt forms an upper strand and a lower strand in order to transport products (P) on the upper strand in the conveying direction (X), and the respective vertical positions of the upper strand and the lower strand define a height segment (H) between each other in the vertical direction (Z), and c) wherein the conveyor system comprises two fastening rails which extend in a longitudinal direction parallel to the conveying direction (X) of the conveyor system , d) wherein each rail comprises at its upper end region a clamping segment which extends in the longitudinal direction (X) and which is limited in the transverse direction (Y) by two mutually parallel side surfaces (A 1 , A 2 ) extending in the X-Z direction, wherein a fastening means of the conveyor system which is placed on the clamping segment and connected to the belt frame can be releasably connected to the clamping segment , characterized in that, the fastening means , which is preferably configured rectangularly or cylindrically around an axis extending in the transverse direction (Y), comprises: e) a notch for placing the fastening means onto the clamping segment , and f) clamping means , in particular a screw or a clamping lever, which interact with the clamping segment , preferably in the notch , in order to be able to releasably clamp the fastening means to the rail . a) wherein the conveyor system extends in a conveying direction (X), a transverse direction (Y) orthogonal thereto and a vertical direction (Z) which is orthogonal to both directions (X, Y), and b) wherein the belt frame comprises at least two deflection elements, preferably pulleys, which are supported by a frame and which support an endless belt guided around the deflection elements, wherein the endless belt forms an upper strand and a lower strand in order to transport products (P) on the upper strand in the conveying direction (X), and the respective vertical positions of the upper strand and the lower strand define a height segment (H) between each other in the vertical direction (Z), and c) wherein the conveyor system comprises two fastening rails which extend in a longitudinal direction parallel to the conveying direction (X) of the conveyor system , d) wherein each rail comprises at its upper end region a clamping segment which extends in the longitudinal direction (X) and which is limited in the transverse direction (Y) by two mutually parallel side surfaces (A 1 , A 2 ) extending in the X-Z direction, wherein a fastening means of the conveyor system which is placed on the clamping segment and connected to the belt frame can be releasably connected to the clamping segment , e) a notch for placing the fastening means onto the clamping segment , and f) clamping means , in particular a screw or a clamping lever, which interact with the clamping segment , preferably in the notch , in order to be able to releasably clamp the fastening means to the rail . <EOS>