PROBLEM TO BE SOLVED: To provide a traveling vehicle such as a riding-type working machine equipped with a turning interlocking control unit, enabling seedlings to be planted at proper positions even if intended for multi-row planting use such as eight-row planting use.SOLUTION: The traveling vehicle comprises a steering mechanisms (175, 180, etc.) capable of changing the directions of front and rear wheels 10 and 11 provided right and left toward the advancing direction through interlocking with the steering direction-determining operation of a handle 34 set on the steering seat of the vehicle 2, and a turning interlocking mechanisms A such as a clutch control arm 86I, a brake control arm 86J, etc. functioning to cut off or brake the driving force of the rear wheel 11 on turning inside through interlocking with the steering mechanisms (175, 180, etc.). In this traveling vehicle, the period of intermittently cutting off or braking the driving force the rear wheel 11 on turning inside by the turning interlocking mechanism A in making a turning of the vehicle, is made shorter, the lower in vehicle speed, while made longer, the higher in vehicle speed.COPYRIGHT: (C)2009,JPO&INPIT【課題】8条植えなどの多条植え用であっても適切な位置で苗の植え付けができる旋回連動制御装置を備えた乗用型作業機などの走行車両を提供すること。【解決手段】走行車体2の操縦席に設けた操向方向を決めるハンドル34の操作に連動して進行方向に向かって左右に設けられた前後輪10,11の向きを変更できるステアリング機構(175,180など)と、該ステアリング機構(175,180など)に連動して旋回内側の後輪11の駆動力を断つか制動するクラッチ操作アーム86I,ブレーキ操作アーム86Jなどの旋回連動機構Aを備え、旋回時に旋回内側の後輪11の駆動力を旋回連動機構Aにより断続的に断つか制動するする周期を車速が遅ければ遅いほど短く、車速が速ければ速いほど長くする走行車両である。【選択図】図6
