| 摘要 |
PURPOSE: To enable the rotary movement of a working tool group to be executed with an upward straight line as a center by permitting a hanging device to have a hanging tool which forms a deformable quadrilateral deformable in a vertical or an almost vertical direction and plural side surface hanging tools. CONSTITUTION: The hanging device 22 is provided with a first hanging tool 48 and a second hanging tool 52 and the first joints 49 and 53 and the second joints 51 and 55 of the two hanging tools 48 and 52 are arranged so as to permit the hanging tool 48 and 52 to form an almost parallelogram being deformable inside a first plate 56 together with a chassis and harvesting mechanism 19. The first joints 49 and 53 are extended forewards from the second joints 51 and 55 and the parallelogram is pussed so that the working tool group 19 easily passes through over an obstacle. Harvesting mechanism 19 is moved upwards and downwards as against the chassis by the linearity of the parallelogram being deformable, which forms the two hanging tools 48 and 52 together with the chassis and harventing mechanism 19 and, moreover, the harvesting mechanism 19 can be is rotated around its first straight line as a center.
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