| 摘要 |
PROBLEM TO BE SOLVED: To provide a pantograph for a railroad car in which an air cylinder is added to a raising mechanism unit of a spring-raised pantograph and a pneumatic control apparatus for supplying a prescribed air pressure to the air cylinder is not required.SOLUTION: A pantograph for a railroad car is characterized in that a spring force of a main spring of a spring-raised pantograph is put in a state where a maximum tension is applied not to raise a pantograph framework, a spring changeable mechanism capable of changing a position of a spring reception part on a framework side of the main spring is provided, the mechanism unit is connected with a head section of a rod-pulling type air cylinder, and a tension is applied to the main spring to raise the framework of the pantograph when air is supplied to the pulling side of the air cylinder. |
