Patent ID: 7430848

Claim:
A traveling mower, comprising: a traveling body provided with a mowing mechanism; a grass collection box for storing grass mowed by the mowing mechanism, the grass collection box being pivotally connected to the traveling body so that it is switchable between a grass collection posture for receiving grass and a discharge posture for discharging grass to ground; and a manual operation member pivotable about a stationary axis arranged at the traveling body for switching the postures of the grass collection box; and an interlock mechanism for associating the grass collection box and the manual operation member with each other; wherein the interlock mechanism includes switching means for increasing a turning angle of the grass collection box per unit operation angle of the manual operation memeber about the axis when the grass collection box is empty or substantially empty and that reduces the turning angle when the grass collection box contains much grass; wherein the interlock mechanism includes: an arm link for turning the grass collection box, and a connection pin to which a force from the manual operation member is applied, the arm link being formed with an elongated groove for movably receiving the connection pin; and wherein the connection pin is moved along the elongated groove by the switching means toward a rotation center of the arm link when the grass collection box is empty or substantially empty, the connection pin being moved along the elongated groove away from the rotation center of the arm link when the grass collection box contains much grass.