Roof box system for motor vehicles and case for a roof box system

A roof box system for motor vehicles, wherein

• the roof box system includes
• a roof of a motor vehicle, which has at least one ceiling element having at least one edge at a roof base element, the roof base element being a roof panel of the motor vehicle, and
• an insertion body with at least one outer wall,
• the at least one ceiling element is movable from an initial state to a receiving state by forming an interspace suitable for receiving the insertion body between the at least one ceiling element and the roof base element,
• in the receiving state, the insertion body is arrangeable in the interspace such that the at least one outer wall of the insertion body forms an outer surface of the roof box system,
• the insertion body includes a closed or lockable receiving space configured to receive transport goods, and
• the insertion body is at least one of a wedge shape and designed as a case having rollers, where the rollers are designed so that they are at least one of sinkable into the main body of the case and foldable so that the sunk or folded rollers do not protrude from the main body of the case, and where the rollers are case guiding means.

An insertion body for a roof box system, wherein

• the insertion body has an interior space and volume changing means configured to change a volume of the interior space between an extended state in which the interior space has a maximum volume and a retracted state in which the interior has a minimum volume,
• the insertion body has a moving means configured as rollers configured to be at least one of sinkable and foldable into a main body of the insertion body such that the sunk or folded moving means does not protrude from the main body of the insertion body,
• the insertion body is configured as a rolling case having a transport means in the form of a traction means, a thrust means or a carrier means in the form of a retractable pulling handle, and
• the insertion body is configured to conform to a roof base element of the rook box system configured as a roof panel of a motor vehicle, the roof box system having at least one ceiling element having at least one edge at the roof base element located under the at least one ceiling element when the at least one ceiling element is in a receiving state.