Device for the blocking of the wheel of a truck at a positioning place near a facade with a loading and unloading platform

Device for the locking of the wheel of a truck with a guide (2) extending from a road side to a façade side with a first wagon (12) moveable therein with a road side axle (7) and road side arm (10), and with a second wagon (13) with a façade side axle (9) and a façade side arm (11), with in between the façade side arm (11) and the road side arm (10) a middle axle (8), whereby the arms (10,11), from a first position, in which the arms (10,11) lie in a substantially straight line, can be folded outwards to a second position, in which the arms (10,11) relative to each other take up a V-shaped form for the blocking of the wheel of the truck.