Trolley for transport in staircase, has tubes connected at point and wheels by plug connections, and other tubes connected at other point and rails by plug connections, where rails have wheels

摘要

The trolley has tubes (4) connected at a point (7) and wheels (1) by plug connections, and tubes (5) connected at a point (8) and rails (2) by plug connections, where the rails have wheels (3). The plug connections are hinged at a frame (6), and are adjoined together, where the tubes (5) are fitted by the plug connections. The tubes are adjustable, and removable from the plug connections.