| 摘要 |
PROBLEM TO BE SOLVED: To make a connection pin coming-off preventive function in track links exhibited in a stable condition over a very long period. SOLUTION: The adjacent track links 20, 21 are connected by two connection pins 24R, 24L to allow pivotal motion, the connection pin 24R is inserted into a pin insertion hole 25R provided ranging from a connection part 22a side to connection parts 22b, 22c, and the connection pin 24L is inserted into a pin insertion hole 25L provided ranging from a connection part 22f side to connection parts 22c, 22e. Overhang parts 27R, 27L are provided adjacently in connection parts 22a, 22f to prevent the respective connection pins 24R, 24L from coming off, a stopper plate 30 is attached to the each overhang part 27R, 27L by a bolt 29, and the stopper plate 30 is inserted into each of the pin insertion hole 25R, 25L to be brought into contact with other end face of the each connection pin 24R, 24L brought into a condition abutting on stopper step differences 26R, 26L.
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