Patent ID: 8403377

Claim:
A first locking device that locks a cab front window of a cab at a closed position or at an opened position, the front window being movable between the closed position in which the front window closes a window opening part of a front face of the cab and the opened position in which the front window opens the window opening part while being housed into a roof-ceiling portion of the cab, the first locking device comprising: a locking mechanism that is provided at a side of the front window; a closing-side lock receiver that is provided at a side of the cab, the closing-side lock receiver being engageable with the locking mechanism of the front window that is positioned at the closed position; and an opening-side lock receiver that is provided at a side of the cab, the opening-side lock receiver being engageable with the locking mechanism of the front window that is positioned at the opened position; wherein the locking mechanism comprises: a lock body that includes an engagement groove with or from which the closing-side lock receiver and the opening-side lock receiver are engaged or disengaged, the lock body being variable by swinging between a neutral posture in which the closing-side lock receiver and the opening-side lock receiver are allowed to be engaged with or disengaged from the engagement groove; a closing-side locking posture in which the closing-side lock receiver that is engaged with the engagement groove is regulated so as not to be disengaged from the engagement groove by swinging around a spindle in a first direction; and an opening-side locking posture in which the opening-side lock receiver that is engaged with the engagement groove is regulated so as not to be disengaged from the engagement groove by swinging around the spindle in a second direction that is different than the first direction; a holding member that maintains the lock body in the closing-side or opening-side locking posture; and a release operation lever that acts on the holding member so as to release the closing-side or opening-side locking posture of the lock body that is maintained by the holding member.