Rotary sector barrier controlling individual access, include circular sectors pivoting about common floor-level axis, actuated by drive motor and levers

摘要

The two wing sectors (4, 4') pivot on a common axis (5) close to the floor. Their radius is approximately the height of the support (2), and corresponds with the height of the casing. Both are controlled by the drive motor (7) over a single lever system (10, 13, 14). This system comprises a drive lever (10) and transmission levers (13, 14). The drive lever has three connection points lying at corners of a notional scalene triangle. At the first corner, the drive lever has a fixed connection with the shaft (8) of the drive motor. At the second corner, the end of the first transmission lever (13) is connected. The other end is connected to a barrier sector (4). At the third corner, the second lever (14) is connected, its other end being connected to the other barrier sector (4'). The first, outer barrier sector (4) has two sidewalls (6) with known circular sector configuration. They are joined together by a corresponding, curved outer wall (15). The other, inner barrier sector telescopes into the hollow space so formed. Linkages of these sectors to the drive lever are further detailed, together with further elaboration of the mechanism. The drive motor is a brushless DC motor acting as a direct drive. Guide rails assist sector pivoting. Details of barrier operation and locking are provided.