| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pantograph which can be compulsorily lifted up to the lowest working height by one air cylinder even in a situation where lifting operation is impossible due to snow or the like. <P>SOLUTION: In a mechanism in which a piston rod 1b of the air cylinder 1 is pushed out to descend the pantograph, a link 2 for fastening a head part 1c of the piston rod 1b and a lever part 5 of a main shaft 6 of the pantograph is provided, pull-in force when air is supplied to the pull-in side of the air cylinder 1 can be transferred to the main shaft 6 of the pantograph, and a position of the cylinder 1 is configured so that by forming a mounting hole of one side of the link 2 into a long hole shape, normal current-collecting performance is not disturbed and the pull-in force does not act with a strength which causes the pantograph to be lifted up higher than the lowest working height. By using this air cylinder 1, the pantograph can be lifted up even if snow accretion is generated to respective parts and the air cylinder 1 is constituted of a single body. The lifting-up work can be quickly performed from a fold-down state without the need for maintenance personnel to perform a snow-removal work or the like. <P>COPYRIGHT: (C)2013,JPO&INPIT |
