PASSAGE BLOCKING DEVICE FOR CONSTRUCTION MACHINE OR THE LIKE

PROBLEM TO BE SOLVED: To provide a passage blocking device preventing interference of a blocking rod with a floor face when adjusting height of a seat without impairing passage blocking action of the blocking rod. SOLUTION: The passage blocking device 10 is provided with a bracket 11, an arm lever 12 turnably provided on the bracket, a slider 13 slidably attached to the arm lever, a first cable 15 and a second cable 16 arranged between the slider and the bracket for drawing the slider to a tip side or a base end side, a spring 17 elastically energizing the slider 13 in a withdrawing direction via the second cable 16, an operation lever 14 turnably provided on the bracket 11 for operating turning of the arm lever 12, and a bypass pulley 35 turnably provided on the operation lever 14 and engaged with a midway part of the first cable.