PROBLEM TO BE SOLVED: To secure stability of a body during turning and to reduce a radius of rotation during turning.SOLUTION: The self-travelling sprayer 1 of the present invention is equipped with a body frame 23 both sides of which are supported on front wheels 18 and rear wheels 19. The sprayer is provided with a fulcrum device 20 for turning on the side of the body frame 23 and in the intermediate part between the front wheels 18 and the rear wheels 19 on the side view. This device 20 includes: a spindle part 35 movably supported between a grounding position P1, in which the tip end part 35a in place of the front wheels 18 and the rear wheels 19 on the side of the device comes into contact with the ground, and a retreating position P2 in which the tip end part retreats above the ground so that the front wheels 18 and the rear wheels 19 of the side come into contact with the ground and a position switching means 36 that switches the spindle part 35 between the grounding position P1 and the retreating position P2. With the spindle part 35 switched to the grounding position P1, the grounded tip end part 35a becomes the fulcrum of turning and, by driving the front wheels 18 and the rear wheels 19 which are on the opposite side from the side of the fulcrum device 20 for turning, the sprayer is structured to be turnable.COPYRIGHT: (C)2014,JPO&INPIT【課題】 旋回時の機体の安定性を確保し、旋回時の回転半径を小さくする。【解決手段】 本発明の自走式噴霧機1は、両側部がそれぞれ前輪18及び後輪19で支持された車体フレーム23を備える。車体フレーム23の側部であって側面視で前輪18及び後輪19の中間部に旋回用支点装置20を備え、該装置20は、それが設けられている側部の前輪18及び後輪19に代えて先端部35aが地面に接地する接地位置P1、並びに、当該側部の前輪18及び後輪19が接地するように地面の上方に退避する退避位置P2の間で移動可能に支持された支軸部35と、支軸部35を接地位置P1及び退避位置P2の間で切り替える位置切替手段36とを備える。支軸部35が接地位置P1に切り替えられることにより接地した先端部35aが旋回の支点となり、当該旋回用支点装置20がある側部とは反対側の側部にある前輪18及び後輪19を駆動することにより旋回可能に構成される。【選択図】 図1
