［Ｉ］
（構成）
本発明の第１特徴は、農作業機を次のように構成することにある。
機体の横側部に支持フレームを備えて、前記支持フレームに揺動自在なリンク機構を備え、
少なくとも３つの予備苗載せ台を、前記リンク機構から横外方に片持ち状に延出されるように前記リンク機構に連結して、
前記予備苗載せ台が上下多段となって平面視で重複した重複状態と、
前記重複状態での上段の予備苗載せ台が中段の予備苗載せ台の前側に位置し、且つ前記重複状態での下段の予備苗載せ台が前記中段の予備苗載せ台の後側に位置するように、前記予備苗載せ台が前後向きに略一直線状になって展開した展開状態とに、
前記リンク機構により前記予備苗載せ台を切換可能に構成し、
前記展開状態において前記リンク機構の揺動を規制することにより、前記展開状態を越えての前記予備苗載せ台の切換移動を止める支持部材を備えている。
[I]
(Constitution)
The first feature of the present invention is that the agricultural machine is configured as follows.
A support frame is provided on the lateral side of the airframe, and a swingable link mechanism is provided on the support frame.
At least three preliminary seedling platforms are connected to the link mechanism so as to extend laterally outward from the link mechanism,
The overlapping state where the preliminary seedling stage is vertically overlapped in plan view and overlapped in plan view,
The upper stage seedling stage in the overlapping state is located on the front side of the middle stage seedling stage, and the lower stage seedling stage in the overlapping state is located on the rear side of the middle stage seedling stage. In the expanded state where the preliminary seedling stage is deployed in a substantially straight line in the front-rear direction,
The link mechanism is configured to be able to switch the preliminary seedling stage,
A support member is provided that stops the switching movement of the preliminary seedling platform beyond the expanded state by restricting the swing of the link mechanism in the expanded state.
［ＩＩ］
（構成）
本発明の第２特徴は、農作業機を次のように構成することにある。
機体の横側部に支持フレームを備えて、前記支持フレームに揺動自在なリンク機構を備え、
少なくとも３つの予備苗載せ台を、前記リンク機構から横外方に片持ち状に延出されるように前記リンク機構に連結して、
前記予備苗載せ台が上下多段となって平面視で重複した重複状態と、
前記重複状態での上段の予備苗載せ台が中段の予備苗載せ台の前側に位置し、且つ前記重複状態での下段の予備苗載せ台が前記中段の予備苗載せ台の後側に位置するように、前記予備苗載せ台が前後向きに略一直線状になって展開した展開状態とに、
前記リンク機構により前記予備苗載せ台を切換可能に構成し、
前記リンク機構は、前記重複状態での前記上段、中段及び下段の予備苗載せ台に亘って連結されて前後回動自在な第１連係リンクと、前記重複状態での前記上段及び中段の予備苗載せ台に亘って連結されて前後回動自在な第２連係リンクと、前記重複状態での前記中段及び下段の予備苗載せ台に亘って連結されて前後回動自在な第３連係リンクとを備えて構成されており、
前記中段の予備苗載せ台と前記第１連係リンクとが第１軸心周りに相対回動可能、前記上段の予備苗載せ台と前記第１連係リンクとが第２軸心周りに相対回動可能、前記下段の予備苗載せ台と前記第１連係リンクとが第３軸心周りに相対回動可能に構成され、
前記中段の予備苗載せ台と前記第２連係リンクとが第４軸心周りに相対回動可能、前記上段の予備苗載せ台と前記第２連係リンクとが第５軸心周りに相対回動可能に構成され、
前記中段の予備苗載せ台と前記第３連係リンクとが第６軸心周りに相対回動可能、前記下段の予備苗載せ台と前記第３連係リンクとが第７軸心周りに相対回動可能に構成されており、
前記展開状態において前記リンク機構の揺動を規制することにより、前記展開状態を越えての前記予備苗載せ台の切換移動を止める支持部材を備えている。
[II]
(Constitution)
The second feature of the present invention is that the agricultural machine is configured as follows.
A support frame is provided on the lateral side of the airframe, and a swingable link mechanism is provided on the support frame.
At least three preliminary seedling platforms are connected to the link mechanism so as to extend laterally outward from the link mechanism,
The overlapping state where the preliminary seedling stage is vertically overlapped in plan view and overlapped in plan view,
The upper stage seedling stage in the overlapping state is located on the front side of the middle stage seedling stage, and the lower stage seedling stage in the overlapping state is located on the rear side of the middle stage seedling stage. In the expanded state where the preliminary seedling stage is deployed in a substantially straight line in the front-rear direction,
The link mechanism is configured to be able to switch the preliminary seedling stage,
The link mechanism includes a first linkage link that is connected across the upper, middle, and lower preliminary seedling platforms in the overlapped state and is rotatable forward and backward, and the upper and middle preliminary seedlings in the overlapped state. A second linkage link connected across the platform and rotatable back and forth; and a third linkage link connected across the middle and lower standby seedling platforms in the overlapped state and rotatable forward and backward. Configured with
The intermediate preliminary seedling platform and the first linkage link are relatively rotatable about a first axis, and the upper preliminary seedling platform and the first linkage link are relatively pivoted about a second axis. Possible, the lower stage seedling stage and the first linkage link is configured to be relatively rotatable around a third axis,
The intermediate preliminary seedling stage and the second linkage link can rotate relative to each other around the fourth axis, and the upper preliminary seedling stage and the second linkage link can rotate relative to each other around the fifth axis. Configured and possible
The intermediate preliminary seedling stage and the third linkage link are relatively rotatable about the sixth axis, and the lower preliminary seedling stage and the third linkage link are relatively rotatable about the seventh axis. Configured to be possible,
A support member is provided that stops the switching movement of the preliminary seedling platform beyond the expanded state by restricting the swing of the link mechanism in the expanded state.
［ＩＩＩ］
（構成）
本発明の第３特徴は、上記の農作業機において、次のように構成することにある。
前記予備苗載せ台を、前記リンク機構から横外方に片持ち状に延出されるように機体前後方向に向いたフレーム部材を介して前記リンク機構に連結して、
前記展開状態において、側面視で前記第１，２，３連係リンクと前記フレーム部材とが斜めに交差した状態で、前記支持部材が前記リンク機構の揺動を規制するように構成されている。
[III]
(Constitution)
The third feature of the present invention resides in the following configuration in the agricultural machine.
The preliminary seedling platform is connected to the link mechanism via a frame member facing in the longitudinal direction of the machine body so as to extend laterally outward from the link mechanism,
In the unfolded state, the support member is configured to restrict the swinging of the link mechanism in a state where the first, second, third link and the frame member are obliquely intersected in a side view.
１９ 支持フレーム
２０ 予備苗載せ台
２０ｕ，２２０ｕ，２２０ｖ 上段の予備苗載せ台
２０ｍ，２２０ｍ，２２０ｕ 中段の予備苗載せ台
２０ｄ，２２０ｄ，２２０ｍ 下段の予備苗載せ台
３０，５０，５１ フレーム部材
３８ 支持部材
６０，２６０ リンク機構
６１，２６１，２６２ 第１連係リンク
６２，２６２，２６４ 第２連係リンク
６３，２６３，２６１ 第３連係リンク
Ｐ１ 第１軸心
Ｐ２ 第２軸心
Ｐ３ 第３軸心
Ｐ４ 第４軸心
Ｐ５ 第５軸心
Ｐ６ 第６軸心
Ｐ７ 第７軸心
19 Support frame 20 Preliminary seedling platform 20u, 220u, 220v Upper preliminary seedling platform 20m, 220m, 220u Middle preliminary seedling platform 20d, 220d, 220m Lower preliminary seedling platform 30, 50, 51 Frame member
38 Support members 60, 260 Link mechanism 61, 261, 262 First linkage link 62, 262, 264 Second linkage link 63, 263, 261 Third linkage link P1 First axis P2 Second axis P3 Third axis P4 fourth axis P5 fifth axis P6 sixth axis P7 seventh axis