PROBLEM TO BE SOLVED: To provide a shift operation mechanism capable of preventing the intrusion of dust etc., into a steering part from outside and improving a degree of freedom in design of itself while permitting rotation around a rotation fulcrum shaft of a steering part without the requirement of disassembling.SOLUTION: The shift operation mechanism includes: a shift operation shaft supported on a side column rotatably around axis so as to be astride the inside and outside of the steering part a shift operation member connected to the inner end of the shift operation shaft a shift intermediate shaft supported on the steering part rotatably around the axis outside a steering space an operation side link mechanism operably linked to the shift operation shaft and the shift intermediate shaft an operation side first link arm linked to the shift intermediate shaft and an operation side link rod operably linked to the operation side first link arm and a transmission device. The operation side first link arm links the shift intermediate shaft and the operation side link rod, allowing the shift intermediate shaft to rotate around the rotation fulcrum shaft with the steering part without shifting the operation side link rod in the axial direction.COPYRIGHT: (C)2011,JPO&INPIT【課題】分解を要することなく操縦部の回動支点軸回りの回動を許容しつつ、外部から操縦部への塵等の侵入防止及び自身の設計自由度向上を図り得る変速操作機構を提供する。【解決手段】操縦部の内外に跨るように軸線回り回転可能にサイドコラムに支持された変速操作軸と、変速操作軸の内端部に連結された変速操作部材と、操縦空間の外方で軸線回り回動可能に操縦部に支持された変速中間軸と、変速操作軸及び変速中間軸を作動連結する操作側リンク機構と、変速中間軸に連結された作動側第1連結アームと、作動側第1連結アーム及び変速装置を作動連結する作動側連結ロッドとを備える。作動側第1連結アームは、作動側連結ロッドを軸線方向に移動させることなく変速中間軸が操縦部と共に回動支点軸回りに回動することを許容しつつ、変速中間軸及び作動側連結ロッドを連結する。【選択図】図3
