To suppress the removal of rollers from a crawler effectively in a crawler unit.
This triangular crawler 2 furnishes a driving wheel 3; the first roller 4; the second roller 5, middle rollers 35 and 36; and a crawler 6 wound on the rollers 3, 4, 5, 35 and 36, to make about a triangular form. A subframe 39 supporting the support shafts 37 of the middle rollers 35 and 36 are installed rotatable by making the advancing direction of the triangular clawler 2 as the axial center and making support shafts 38 as the center, to a stay 22 fixed at the lower part of a main frame 17 to support the driving wheel 3 rotatable. Consequently, the middle rollers 35 and 36 are inclined to the left side and the right side following the inclination of the crawler 6. And the support shafts 38 are in the condition inserted to rubber bushes 42 which are fitted to the extensions 22a of the stay 22, and the vibration of the middle rollers 35 and 36 is absorbed by the rubber bushes 42.
KATSUTA YUJI
SHIBAZAKI SHUNICHI
TOYOTA MOTOR CORP
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