Transport device for overcoming a step-like obstacle

Transport device (2) for overcoming a step-like obstacle (1), wherein the transport device (2) has a support structure (3) for supporting a load (4) to be transported, and wherein a climbing element (7) of the transport device (2) is attached to a lower end of the support structure (3), and wherein the transport device (2) can be moved in a traveling position on a floor (9) in front of the step-like obstacle (1), and wherein via a tilting movement of the support structure (3) towards the step-like obstacle (1) a support element (10) of the transport device (2) can be set down on an upper surface (1a) of the step-like obstacle (1) and the transport device (2) can thereby be brought from its traveling position into a lower changeover position, and wherein in the lower changeover position of the transport device (2) the support structure (3) is supported against the floor (9) and via the support element (10) against the upper surface (1a) of the step-like obstacle (1), and wherein via a further tilting movement of the support structure (3) towards the step-like obstacle (1) starting from the lower changeover position of the transport device (2) the support structure (3) can be tilted over the support element (10) in such a way that the climbing element (7) is raised and the transport device (2) can thereby be brought from its lower changeover position into a lift-out position, and wherein in the lift-out position of the transport device (2) the support structure (3) is supported against the upper surface (1a) of the step-like obstacle (1) via the support element (10) and the climbing element (7) is raised relative to the floor (9), and wherein the transport device (2) can be brought from its lift-out position into an upper changeover position, and wherein in the upper changeover position of the transport device (2) the support structure (3) is supported against the upper surface (1a) of the step-like obstacle (1) via the climbing element (7) and via the support element (10), and wherein the transport device (2) on the step-like obstacle (1) can be brought from its upper changeover position into its traveling position, and wherein the transport device (2) in its traveling position can be moved on the upper surface (1a) of the step-like obstacle (1), characterised in that the transport device (2) has a connecting element (11), and in that the transport device (2) has a guide element (12) connected to the support structure (3), and in that the connecting element (11) is guided by the guide element (12), and in that the support element (10) is connected to the connecting element (11) in an articulated manner, and in that in the lower changeover position of the transport device (2) the connecting element (11) is located in a first position relative to the support element (10), and in that in the lift-out position of the transport device (2) the connecting element (11) is located in a second position relative to the support element (10), and in that, in order to bring the transport device (2) from its lower changeover position into its lift-out position, the connecting element (11) can be pivoted around a pivot axis (13) of the transport device (2) from its first position relative to the support element (10) into its second position relative to the support element (10), while the support structure (3) is supported against the upper surface (1a) of the step-like obstacle (1) via the support element (10), and in that in the lift-out position of the transport device (2) the connecting element (11) is located in a first position relative to the guide element (12), and in that in the upper changeover position of the transport device (2) the connecting element (11) is located in a second position relative to the guide element (12), and in that, in order to bring the transport device (2) from its lift-out position into its upper changeover position, the connecting element (11) can be brought from its first position relative to the guide element (12) into its second position relative to the guide element (12), while the support structure (3) is supported against the upper surface (1a) of the step-like obstacle (1) via the support element (10).