System for constructing temporary building structure e.g. stage, has two tubes connected with angled struts and angled braces, cylindrical shells interconnected by hinge, and coupling part utilized for coupling two tubes

摘要

The system has two tubes (2a, 2b) connected with angled struts (3a-3c) and angled braces (4a-4d). Cylindrical shells are interconnected by a hinge. A connection piece is made of die cast aluminum or plastic, and the system is provided with beams, columns and joints that are made of metal or reinforced plastic. External threads are provided in ends of tie rods. A coupling body is formed in a disk-shape. Two drive shafts are fitted with an internal thread. A coupling part is utilized for coupling the two tubes.