| 摘要 |
PURPOSE:To readily carry out direction turning, by regulating a lift height of a machine body by lifting a float through operation of an operating lever to a constant height at which the machine body can be turned and raising the machine body to a state without mud pushing or more lift than that required. CONSTITUTION:In order to turn the direction of a rice transplanter in a field, rice transplanting is stopped and an operating lever 55 is rotated to the front direction to lift the front of the central float 7. A changeover valve 33 is changed over to machine body lift through a sensor 35 and lift the machine body. An engaging piece 54 is protruded by force of a spring 53 and meshes with rack teeth 50 to transmit forward movement of a connected moving body 52 by advance of a piston 23 to a spool 34 of the changeover valve 33 and return the changeover valve 33 to the neutral position. The machine body stops the rising movement at a position elevated by a given height.
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