PURPOSE: To operate a machine body lifted in a condition of holding it parallelly surely so that the machine body is prevented from tilting relative to the ground surface, in a turning structure for a four-wheeled agrocultural work vehicle constituted by providing a pantograph type jack up mechanism so as to enable the machine body to turn pivotally where it is left as placed in a condition of lifting it.
CONSTITUTION: In a supporting seat 4 supported to a part in the vicinity of the center of gravity of a machine body in its lower part, vertically swivelable front first/rear first links 5, 7 are provided, and in point ends of the front first/ rear first links 5, 7, front second/rear second links 6, 8 are vertically swivelably provided, to connect a grounding part 12 over both the point ends of the front second/rear second links 6, 8. Here are provided the first gear mechanisms 5a, 7a, 17, 18 for determining swivel angles of the front first/rear first links 5, 7 relating to the supporting seat 4 and the second gear mechanisms 6a, 8a, 19, 20 fore determining swivel angles of the front second/rear second links 6, 8 relating to the grounding part 12.
IKEGAMI SEIICHI
KAGAWA TOSHIAKI
AOYAMA HITOSHI
NAKAMURA HAJIME
YOSHIDA SADAJI
YANAGIHARA KATSUMI
USHIRO KENZO
IWATA KUNINOSUKE
FUJITA SATOSHI
HAMAMOTO TOSHIYUKI
KITAGAWA RYUJI
SHIYOUEN SHIGEO
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