Tube conveyor comprising a conveyor belt and a device for protecting the conveyor belt of the tube conveyor against volumetric overloading, - the tube conveyor containing a middle part, situated between a filling site and a discharge site, - where in the middle part the conveyor belt is coiled essentially into the shape of a tube by the action of rollers, which are mounted on roller stands, - wherein a measuring stand is arranged behind the filling site, - the measuring stand comprising a stationary frame and a swivelling frame able to pivot relative to the stationary frame, - the stationary frame comprising lower rollers (22, 24) mounted beneath a horizontal transverse axis (h) of the coiled conveyor belt, - the swiveling frame comprising upper inclined rollers mounted above the horizontal transverse axis (h) of the coiled conveyor belt, and - the measuring stand comprising a force measuring device provided for continuous detection of the loading forces transferred from the conveyor belt to the measuring stand, and provided for sending signals representing the loading forces to a control unit, wherein the tube conveyor comprises a locking mechanism to which the control unit is able to send the switch-off signal, wherein the locking mechanism is able to lock the swivelling frame to the stationary frame during movement of the conveyor belt and to release it after receiving the switch-off signal, characterized in that the swivelling frame is able to move around a horizontal axis (f) of the stationary frame, the horizontal axis (f) is arranged above the conveyor belt in a direction perpendicular to the direction (b) of its movement, while the force measuring device contains a weighing cell which is mounted to at least one upper roller (21, 23). - the tube conveyor containing a middle part, situated between a filling site and a discharge site, - where in the middle part the conveyor belt is coiled essentially into the shape of a tube by the action of rollers, which are mounted on roller stands, - wherein a measuring stand is arranged behind the filling site, - the measuring stand comprising a stationary frame and a swivelling frame able to pivot relative to the stationary frame, - the stationary frame comprising lower rollers (22, 24) mounted beneath a horizontal transverse axis (h) of the coiled conveyor belt, - the swiveling frame comprising upper inclined rollers mounted above the horizontal transverse axis (h) of the coiled conveyor belt, and - the measuring stand comprising a force measuring device provided for continuous detection of the loading forces transferred from the conveyor belt to the measuring stand, and provided for sending signals representing the loading forces to a control unit, wherein the tube conveyor comprises a locking mechanism to which the control unit is able to send the switch-off signal, wherein the locking mechanism is able to lock the swivelling frame to the stationary frame during movement of the conveyor belt and to release it after receiving the switch-off signal, characterized in that the swivelling frame is able to move around a horizontal axis (f) of the stationary frame, the horizontal axis (f) is arranged above the conveyor belt in a direction perpendicular to the direction (b) of its movement, while the force measuring device contains a weighing cell which is mounted to at least one upper roller (21, 23). wherein the tube conveyor comprises a locking mechanism to which the control unit is able to send the switch-off signal, wherein the locking mechanism is able to lock the swivelling frame to the stationary frame during movement of the conveyor belt and to release it after receiving the switch-off signal, characterized in that the swivelling frame is able to move around a horizontal axis (f) of the stationary frame, the horizontal axis (f) is arranged above the conveyor belt in a direction perpendicular to the direction (b) of its movement, while the force measuring device contains a weighing cell which is mounted to at least one upper roller (21, 23).