In order to increase the fitness for use of a closing device (1) for continuously and gravimetrically dosing pourable material, particularly rough fuels, a flow of material is conveyed from a charging opening (5) to an emptying opening (7) in a housing (4) with a rotor (3), which is driven about a vertical rotation axis, while determining the instantaneous load over a measuring section, and with a force measuring device (10), which detects the instantaneous load of the flow of material guided via the rotor (3) and which is connected to the housing (4) mounted on a pivot axis (8). According to the invention, a vibrating funnel (50) with a vibration generator (52) is provided above the charging opening (5) of the rotor (3).