Very open cock of the bus door automatic opening and closing device

摘要

(57) [summary] [purpose] high degree of freedom of the mounting position, improve the operability and durability. [Configuration] door drive unit 1 for opening and closing the door by the automatic opening and closing valve 2 And, in the door automatic opening and closing apparatus for a bus and a very open cock 20 to supply and exhaust the compressed air in the door driving device 1 by manual operation, very open cock 20, supply and exhaust mechanism of compressed air provided in the switching valve in 21 valve spool 22 having the When a vehicle operating handle 26 which is fixed to one end of the valve spool 22, the first and second pistons 23, 25 provided on both sides of the supply and exhaust mechanism of the valve spool 22, and is fixed to one end of the valve spool 22 a vehicle operating handle 26, the supply signal for remote operation valve 28 for supplying compressed air to the outer chamber of the first piston 23, the exhaust signal for supplying compressed air to the outer chamber of the second piston 25 It consists use remote control valve 27..