The present invention provides a packaging machine (1), comprising a loading station (2) where a product container (3) is filled with a product (P), wherein the loading station (2) comprises a push bar conveyor (4) for transporting the product container (3) along a conveying direction (R), wherein the push bar conveyor (4) comprises at least one pack support plate (8) for supporting a bottom of the product container (3) in a conveying plane (E), a drive chain (9), a push bar (10) and a coupling device (11) for mounting the push bar (10) at the drive chain (9), wherein the coupling device (11) comprises a resilient clip (12) for holding an end (13) of the push bar (10).