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    • 72. 发明授权
    • Transport vehicle and transport vehicle system
    • US10065840B2
    • 2018-09-04
    • US15068982
    • 2016-03-14
    • MURATA MACHINERY, LTD.
    • Takanori Izumi
    • B66C7/12B66C7/02B66C9/02B66C9/04H01L21/677
    • A transport vehicle travels on first and second paths orthogonally or diagonally crossing each other and each including an opening at a center and treads on both sides of the opening. The transport vehicle includes a vehicle in an upper portion; a transport in a lower portion to hold an article; and a column extending downward from the vehicle to the transport. The vehicle includes on front and rear of the column along the first path, at least a pair of first traveling units each including a first traveling wheel that travels on the tread of the first path, and first auxiliary wheels on front and rear of the first traveling wheel along the first path; on front and rear of the column along the second path, at least a pair of second traveling units each including a second traveling wheel that travels on the tread of the second path, and second auxiliary wheels on front and rear of the second traveling wheel along the second path; and a lifting mechanism that raises and lowers one of the at least the pair of first traveling units and the at least the pair of second traveling units.