Being equipped in the job car, at least falling down of the lumber, the harvester device whose branch striking and cross cutting job are possible (100) being, opening and closing in thickness direction of the lumber the branch striking section which is arranged the lumber which grips the lumber the grip possible grip nail (116) with, the grip nail (116) with in the position where length direction of the lumber which is gripped the cutting possible chain saw (120) with, the grip nail (116) vis-a-vis, differs, does the branch striking of the lumber (110) with, the said branch striking section (110) with the grip nail (116) with length directionDistance the displacement possible slide frame (105) with, the slide frame (105) due to the sensor in order to check the slide quantity (130) with, having, it constitutes.作業車に装備され、少なくとも木材の伐倒、枝打ち、玉切り作業が可能なハーベスタ装置(100)であって、木材の太さ方向に開閉して木材を把持可能な把持爪(116)と、把持爪(116)により把持した木材を切断可能なチェーンソー(120)と、把持爪(116)に対して、把持される木材の長さ方向の異なる位置に配置され、木材の枝打ちを行なう枝打ち部(110)と、該枝打ち部(110)と把持爪(116)との長さ方向距離を変位可能なスライドフレーム(105)と、スライドフレーム(105)によるスライド量を検知するためのセンサ(130)と、を備えて構成する。
