PIPING STRUCTURE FOR MOVING SECTION

摘要

PROBLEM TO BE SOLVED: To prevent the breakage of a grease feed pipe to the pin device of a work machine and to efficiently feed grease. SOLUTION: A plurality of work machine components are rockably connected by a pin device 34 constituted of a tubular boss 35 and a pivotal support pin 36 inserted into the boss 35 in a work machine 4. The work machine 4 is provided with a grease feed pipe 30 feeding grease to the pin device 34 and a grease feed port 37 provided on the pin device 34. The grease feed pipe 30 is arranged to surround the outer periphery of the boss 35 in the peripheral direction and is connected to the grease feed port 37.