PROBLEM TO BE SOLVED: To provide a seeding machine in which a grooving depth and a soil covering width are interlocked and changed in conformity to hardness and softness of a field, and soil can be covered with the amount of earth and sand suitable for a seeding groove depth.SOLUTION: A seeding machine is liftably provided with a seeding unit 8 for feeding seeds accumulated in a seeding hopper 1 from a feeding unit 2 to a field at the rearward of a traveling vehicle body 9, is provided with a grooving unit 7 for forming the groove part with the seeds getting therein below the seeding unit 8, and is provided with a soil covering plate 6 for covering and burying soil in the groove part formed by the grooving unit 7. The seeding machine is configured such that the change of the soil covering width of the soil covering plate 6 and the change of a grooving depth of the grooving unit 7 can be interlocked and operated by a soil covering actuator 12, which operates to deepen the grooving depth of the grooving unit 7 by increasing a pressing force of the soil covering plate 6 on a hard soil surface, and to shallow the grooving depth of the grooving unit 7 by decreasing the pressing force of the soil covering plate 6 on a soft soil surface.COPYRIGHT: (C)2015,JPO&INPIT【課題】圃場の硬軟に合わせて作溝深さと覆土幅を連動させて変化させ、播種溝の深さに適した量の土砂で覆土することができる播種機を提供する。【解決手段】走行車体9の後部に播種ホッパ1に貯留された種子を繰出装置2から圃場に繰り出す播種装置8を昇降自在に設け、播種装置8の下方に種子が入り込む溝部を形成する作溝器7を設け、作溝器7が形成した溝部に土を被せて埋める覆土板6を設けた播種機において、覆土板6の覆土幅変更と作溝器7の作溝深さ変更とを覆土アクチュエータ12で連動操作可能とし、硬い土壌面においては覆土板6の押え力を強くして作溝器7の作溝深さを深くするように作動し、柔らかい土壌面においては覆土板6の押え力を弱くして作溝器7の作溝深さを浅くする構成とする。【選択図】 図2
