A system for immobilizing a semi-trailer kingpin on a transport vehicle includes a balance arm and a substantially horizontal rigid linking structure designed to guide the vertical movement of the receiving nacelle, hold it in position above the lifting system in a horizontal plane and take up the forces exerted thereon. The longitudinal rigid linking structure is hingedly linked to the receiving nacelle and to the transport vehicle in order to take up the longitudinal forces from same, and the balance arm includes preloaded springs that take up the forces exerted on the balance arm when the receiving nacelle is temporarily inclined relative to the horizontal plane. The lifting system for lifting the receiving nacelle is mounted pivoting on the railway unit at a pivot pin transverse to the longitudinal axis of the transport vehicle.

An impact detection device for a system for locking the kingpin of a semitrailer on a railway unit includes a rigid connecting piece connected to a kingpin receiving structure and a connecting shaft connecting the rigid connecting piece to the railway unit, mounted on the railway unit, received with the ability to pivot in an oblong provided in the rigid connecting piece and capable of moving in the oblong. The device also includes a shear pin that prevents the connecting shaft from moving in the oblong and which breaks in the event of an impact so as to allow the connecting shaft to move in the oblong, a bypass pipe mounted as a bypass on the general pipe of the railway unit, and a cutoff tool secured to the railway unit, which cuts off the bypass pipe when the shear pin is broken and a connecting shaft is moving in the oblong.

A freight vehicle is provided including a set of road wheels configured for road traversal; a set of rail wheels configured for rail traversal, the set of rail wheels being separate from the set of road wheels; and an actuation system configured to modify a relative positioning of the set of road wheels and the set of rail wheels to facilitate operation of the freight vehicle according to a plurality of operational modes. The plurality of operational modes include a road traversal mode wherein the actuation system causes the set of road wheels to contact a road and a rail traversal mode wherein the actuation system causes the set of rail wheels to contact a rail.

A system for immobilizing a semi-trailer kingpin on a transport vehicle includes a balance arm and a substantially horizontal rigid linking structure designed to guide the vertical movement of the receiving nacelle, hold it in position above the lifting system in a horizontal plane and take up the forces exerted thereon. The longitudinal rigid linking structure is hingedly linked to the receiving nacelle and to the transport vehicle in order to take up the longitudinal forces from same, and the balance arm includes preloaded springs that take up the forces exerted on the balance arm when the receiving nacelle is temporarily inclined relative to the horizontal plane. The lifting system for lifting the receiving nacelle is mounted pivoting on the railway unit at a pivot pin transverse to the longitudinal axis of the transport vehicle.

An impact detection device for a system for locking the kingpin of a semitrailer on a railway unit includes a rigid connecting piece connected to a kingpin receiving structure and a connecting shaft connecting the rigid connecting piece to the railway unit, mounted on the railway unit, received with the ability to pivot in an oblong provided in the rigid connecting piece and capable of moving in the oblong. The device also includes a shear pin that prevents the connecting shaft from moving in the oblong and which breaks in the event of an impact so as to allow the connecting shaft to move in the oblong, a bypass pipe mounted as a bypass on the general pipe of the railway unit, and a cutoff tool secured to the railway unit, which cuts off the bypass pipe when the shear pin is broken and a connecting shaft is moving in the oblong.

The invention relates to a removable supporting cross-member (1) comprising: a built-in adjustable-height fifth wheel (18) for receiving the kingpin of semi-trailer, and front (26, 27) and rear (28) openings for the passage of the fork arms of a forklift truck or tractor. The invention can be used for moving a semi-trailer, positioning the semi-trailer horizontally on a carriage and securing same for transport, as well as for the corresponding operations during unloading, using only a forklift truck or tractor suitably dimensioned for the loads to be supplied. The invention is suitable for use by those involved in intermodal trail transport.