JP2013208099A - Seedling rest divided structure of rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply perform switching to the housed state of a seedling rest.SOLUTION: A seedling rest 15 is a divided structure having a main seedling placing part 15A and a divided seedling placing part 15B, and a connecting mechanism 34 is provided for connecting the main seedling placing part 15A and the divided seedling placing part 15B to each other in the state of allowing the lateral sliding and the vertical rocking of the divided seedling placing part 15B to the main seedling placing part 15A. The connecting mechanism 34 is constructed so that the seedling rest 15 can be switched between the working state where the main seedling placing part 15A and the divided seedling placing part 15B are laterally connected to each other and the housed state where the divided seedling placing part 15B is superposed on the main seedling placing part 15A, the proper rocking supporting point position P1 of the divided seedling placing part 15B for locating the divided seedling placing part 15B in the housed position and the proper rocking operating position P2 are set, and the proper rocking supporting point position P1 is located laterally outside of the machine body from the dividing end of the main seedling placing part 15A. The connecting mechanism 34 is provided with a rocking allowing means 80 for allowing the rocking displacement of the divided seedling placing part 15B before the divided seedling placing part 15B reaches the proper rocking operating position P2.

Description

本発明は、苗載台を主苗載部と分割苗載部とに左右に分割可能に構成し、前記主苗載部に対する前記分割苗載部の左右方向への摺動変位と上下方向への揺動変位とを許容する状態に前記主苗載部と前記分割苗載部とを連結する連結機構を備えて、前記苗載台を、前記主苗載部と前記分割苗載部とを左右に連接した作業状態と、前記主苗載部の苗載面の上方に前記分割苗載部を重ねた収納状態とに切り換え可能な分割収納式に構成した田植機の苗載台分割構造に関する。   The present invention is configured so that the seedling stage can be divided into a main seedling part and a divided seedling part in the left and right directions, and the sliding displacement of the divided seedling part in the left and right direction and the vertical direction with respect to the main seedling part. A connecting mechanism that connects the main seedling placing part and the divided seedling placing part in a state that allows the rocking displacement of the seedling placing part, the seedling placing stand, the main seedling placing part and the divided seedling placing part The present invention relates to a seeding platform splitting structure of a rice transplanter configured in a split storage type that can be switched between a working state connected to the left and right and a storage state in which the split seedling mounting unit is stacked above the seedling mounting surface of the main seedling mounting unit .

上記のような田植機の苗載台分割構造としては、連結機構を、機体横外側の摺動限界位置まで分割苗載部（分割苗載せ台）を摺動変位させることにより、分割苗載部の上下方向への揺動変位が可能になり、その摺動限界位置にて分割苗載部を上方に揺動変位させることにより、苗載台を収納状態に切り換えられるように構成したものがある（例えば特許文献１参照）。   As the seedling platform splitting structure of the rice transplanter as described above, the split seedling mounting section is obtained by slidingly displacing the split seedling mounting section (divided seedling mounting platform) to the sliding limit position on the lateral outer side of the machine body. There is a configuration in which the seedling mounting base can be switched to the housed state by swinging the split seedling mounting portion upward at the sliding limit position. (For example, refer to Patent Document 1).

特開２００１−１６９２８号公報JP 2001-16928 A

上記の構成では、機体横外側の摺動限界位置まで分割苗載部を摺動変位させない限り、分割苗載部を上方に揺動変位させることができないことから、苗載台の収納状態への切り換え操作が行い難くなっており、苗載台を収納状態に切り換える際の操作性の面において改善の余地があった。   In the above configuration, the split seedling mounting part cannot be swung upwardly unless the split seedling mounting part is slid and displaced to the sliding limit position on the lateral outer side of the machine body. Switching operations are difficult to perform, and there is room for improvement in terms of operability when switching the seedling stand to the storage state.

本発明の目的は、苗載台の収納状態への切り換えを簡単に行えるようにすることにある。   An object of the present invention is to make it possible to easily switch the seedling stage to the storage state.

本発明の請求項１に係る発明は、苗載台を主苗載部と分割苗載部とに左右に分割可能に構成し、前記主苗載部に対する前記分割苗載部の左右方向への摺動変位と上下方向への揺動変位とを許容する状態に前記主苗載部と前記分割苗載部とを連結する連結機構を備えて、前記苗載台を、前記主苗載部と前記分割苗載部とを左右に連接した作業状態と、前記主苗載部の苗載面の上方に前記分割苗載部を重ねた収納状態とに切り換え可能な分割収納式に構成した田植機の苗載台分割構造において、
前記分割苗載部を所定の収納位置に位置させるための前記分割苗載部の適正揺動支点位置と適正揺動操作位置とを設定し、
前記適正揺動支点位置が前記主苗載部の分割端よりも機体横外側に位置する状態に前記連結機構を構成し、
前記連結機構に、前記分割苗載部が前記適正揺動操作位置に到達する以前からの前記分割苗載部の揺動変位を許容する揺動許容手段を備えた。 The invention according to claim 1 of the present invention is configured so that the seedling stage can be divided into a main seedling part and a divided seedling part in the left-right direction, and the divided seedling part with respect to the main seedling part in the left-right direction. A connecting mechanism for connecting the main seedling placing part and the divided seedling placing part in a state allowing sliding displacement and swinging displacement in the vertical direction; and A rice transplanter configured in a split storage type that can be switched between a working state in which the split seedling placement part is connected to the left and right and a storage state in which the split seedling placement part is stacked above the seedling placement surface of the main seedling placement part. In the seedling stand division structure of
Setting an appropriate swinging fulcrum position and an appropriate swinging operation position of the divided seedling mounting part for positioning the divided seedling mounting part in a predetermined storage position;
The coupling mechanism is configured in a state where the proper swing fulcrum position is located on the laterally outer side of the machine body from the split end of the main seedling placement part,
The coupling mechanism is provided with a rocking permission means for allowing rocking displacement of the divided seedling placing part before the divided seedling placing part reaches the proper rocking operation position.

上記の発明では、適正揺動支点位置が主苗載部の分割端よりも機体横外側に位置することにより、分割苗載部を揺動変位によって収納位置に位置させる際に連結機構が主苗載部に干渉し難くなる。そのため、分割苗載部の収納位置をより主苗載部側に寄せた位置に設定することができ、収納状態での苗載台の左右幅をより小さくすることができる。   In the above invention, the proper swinging fulcrum position is located on the laterally outer side of the machine body from the split end of the main seedling mounting portion, so that the coupling mechanism is used when the split seedling mounting portion is positioned at the storage position by swinging displacement. It becomes difficult to interfere with the loading section. Therefore, the storage position of the divided seedling mounting part can be set to a position closer to the main seedling mounting part side, and the lateral width of the seedling mounting base in the stored state can be further reduced.

又、苗載台を作業状態から収納状態に切り換えるときには、分割苗載部を適正揺動操作位置まで確実に摺動変位させなくても、適正揺動操作位置に到達する前の段階から分割苗載部を収納位置に向けて揺動変位させることができる。つまり、分割苗載部の摺動操作と揺動操作とが完全に区切られた２段階操作ではなく、分割苗載部の摺動操作から揺動操作への移行を円滑に行える一連の操作で分割苗載部を収納位置に向けて移動させることができ、これにより、苗載台を作業状態から収納状態に切り換える際の操作性を向上させることができる。   In addition, when switching the seedling stage from the working state to the stored state, the divided seedling stage can be started from the stage before reaching the proper swinging operation position without surely sliding the split seedling mounting part to the proper swinging operation position. The mounting portion can be oscillated and displaced toward the storage position. In other words, it is not a two-stage operation in which the sliding operation and swinging operation of the divided seedling mounting part are completely separated, but a series of operations that can smoothly shift from the sliding operation of the split seedling mounting part to the swinging operation. The divided seedling placement section can be moved toward the storage position, and thereby the operability when the seedling placement base is switched from the working state to the storage state can be improved.

従って、苗載台の収納状態での左右幅を狭くしながら、苗載台の作業状態から収納状態への切り換えを、主苗載部に連結機構を干渉させることなく簡便に行うことができる。   Therefore, it is possible to easily switch the working state of the seedling table from the working state to the stored state without causing the main seedling unit to interfere with the coupling mechanism, while narrowing the left and right width in the stored state of the seedling table.

本発明の請求項２に係る発明は、上記請求項１に記載の発明において、
前記連結機構に、前記分割苗載部が前記主苗載部に連接する連接位置から前記連接位置と前記適正揺動操作位置との間に設定した揺動許容位置に到達するまでの間において前記分割苗載部の揺動変位を阻止する揺動規制手段を備えた。 The invention according to claim 2 of the present invention is the invention according to claim 1,
In the connecting mechanism, the divided seedling mounting part is in a period from the connection position where the divided seedling mounting part is connected to the main seedling mounting part to the swing allowable position set between the connection position and the proper swing operation position. A rocking restricting means for preventing the rocking displacement of the divided seedling mounting portion is provided.

上記の発明では、可動部材の揺動許容位置を、分割苗載部が適正揺動操作位置に到達する以前の分割苗載部の揺動変位によって分割苗載部が主苗載部などに接触する虞のない位置に設定しておけば、苗載台を作業状態から収納状態に切り換える際の操作性を向上させながら、その切り換えの際に分割苗載部が主苗載部などに接触することに起因した損傷を未然に回避することができる。   In the above-described invention, the swinging allowable position of the movable member is determined so that the split seedling mounting part contacts the main seedling mounting part or the like by the swinging displacement of the split seedling mounting part before the split seedling mounting part reaches the proper swing operation position. If it is set to a position where there is no risk of this, the split seedling mounting part comes into contact with the main seedling mounting part etc. at the time of switching while improving the operability when switching the seedling mounting base from the working state to the storage state. The damage caused by this can be avoided in advance.

本発明の請求項３に係る発明は、上記請求項２に記載の発明において、
前記連結機構に、前記主苗載部に固定した固定部材と、一端部に前記分割苗載部を連結した可動部材とを備え、前記固定部材に対する前記可動部材の左右摺動により前記分割苗載部が左右方向に摺動変位し、かつ、前記固定部材に対する前記可動部材の支軸を支点にした起伏揺動により前記分割苗載部が上下方向に揺動変位するように前記連結機構を構成し、
前記固定部材に、前記可動部材の左右摺動を許容する状態で前記可動部材の倒伏方向下手側から前記可動部材を受け止め支持する支持部を形成し、
前記固定部材における前記適正揺動支点位置の対応箇所に前記支軸を配備し、かつ、前記可動部材に前記支軸との当接により前記可動部材の機体横外方への摺動を制限する当接部を備え、
前記分割苗載部が前記揺動許容位置に位置するときの前記支軸の中心位置に対応する前記可動部材の摺動方向での所定箇所を境界位置に設定して、前記可動部材における前記境界位置から分割苗載部側の部分に前記支持部により受け止め支持される被支持部を形成することにより前記揺動規制手段を構成し、かつ、前記可動部材における前記境界位置から主苗載部側の部分に前記支持部との間に隙間を確保して前記可動部材の起伏揺動を許容する切欠部を形成することにより前記揺動許容手段を構成した。 The invention according to claim 3 of the present invention is the invention according to claim 2,
The connection mechanism includes a fixed member fixed to the main seedling mounting portion and a movable member having the one end portion connected to the divided seedling mounting portion, and the divided seedling mounting is performed by sliding the movable member to the left and right with respect to the fixed member. The connecting mechanism is configured such that the split seedling portion swings and displaces in a vertical direction by undulation swinging with the support member of the movable member as a fulcrum with respect to the fixed member. And
Forming a support portion on the fixed member to receive and support the movable member from the lower side in the falling direction of the movable member while allowing the movable member to slide left and right.
The support shaft is arranged at a position corresponding to the proper swinging fulcrum position of the fixed member, and the sliding of the movable member to the lateral side of the body is restricted by contacting the movable member with the support shaft. A contact portion,
A predetermined position in the sliding direction of the movable member corresponding to the center position of the support shaft when the divided seedling mounting portion is located at the swing allowable position is set as a boundary position, and the boundary in the movable member The swing restricting means is configured by forming a supported portion that is received and supported by the support portion in a portion on the divided seedling placement portion side from the position, and the main seedling placement portion side from the boundary position in the movable member The rocking allowance means is configured by forming a notch portion that secures a gap between the support member and the support member and allows the movable member to swing up and down.

上記の発明では、可動部材の境界位置を適切に設定することにより、苗載台を作業状態から収納状態に切り換える際に分割苗載部が主苗載部などに接触することに起因した損傷を未然に回避することができる。   In the above invention, by appropriately setting the boundary position of the movable member, damage caused by the divided seedling mounting part contacting the main seedling mounting part or the like when the seedling mounting base is switched from the working state to the storage state. It can be avoided in advance.

又、境界位置を基準にして被支持部及び切欠部を形成するだけで揺動規制手段及び揺動許容手段を構成できることから、部品点数の削減や構成の簡素化などを図ることができる。   Further, since the swing restricting means and the swing permitting means can be configured only by forming the supported portion and the notch portion with reference to the boundary position, the number of parts can be reduced and the configuration can be simplified.

従って、部品点数の削減や構成の簡素化などを図りながら、苗載台の作業状態から収納状態への切り換えを、主苗載部に分割苗載部を干渉させることなく簡便に行うことができる。   Therefore, while reducing the number of parts and simplifying the configuration, it is possible to easily switch the seedling mounting table from the working state to the storing state without causing the main seedling mounting portion to interfere with the divided seedling mounting portion. .

本発明の請求項４に係る発明は、上記請求項１〜３のいずれか一つに記載の発明において、
前記連結機構に、前記分割苗載部が前記適正揺動操作位置に到達する以前での前記分割苗載部の前記収納位置に向けた揺動変位に伴って、前記分割苗載部が前記適正揺動操作位置に到達した状態が得られるように前記分割苗載部を摺動案内する案内手段を備えた。 The invention according to claim 4 of the present invention is the invention according to any one of claims 1 to 3,
The split seedling mounting portion is moved to the proper position in accordance with the swing displacement of the split seedling mounting portion toward the storage position before the split seedling mounting portion reaches the proper swing operation position. Guiding means for slidingly guiding the divided seedling mounting portion is provided so as to obtain a state of reaching the swing operation position.

上記の発明では、分割苗載部の摺動操作から揺動操作への移行を円滑に行える一連の操作で分割苗載部を収納位置に向けて移動させることができるだけでなく、この一連の操作の完了とともに苗載台を確実に収納位置に位置させることができる。   In the above-described invention, not only can the divided seedling mounting unit be moved toward the storage position by a series of operations that can smoothly shift from the sliding operation of the divided seedling mounting unit to the swinging operation, but this series of operations can also be performed. The seedling stage can be reliably positioned at the storage position with the completion of.

従って、苗載台の作業状態から収納状態への切り換えを、より簡便にしながら切り換え操作の確実性を高めることができる。   Therefore, it is possible to increase the reliability of the switching operation while making it easier to switch the seedling stage from the working state to the stored state.

本発明の請求項５に係る発明は、上記請求項１〜４のいずれか一つに記載の発明において、
前記連結機構に、前記分割苗載部が前記適正揺動操作位置に到達するのに伴って、前記分割苗載部を前記適正揺動操作位置に保持する保持手段を備えた。 The invention according to claim 5 of the present invention is the invention according to any one of claims 1 to 4,
The connection mechanism includes holding means for holding the divided seedling placing part at the proper swinging operation position as the divided seedling placing part reaches the proper swinging operation position.

上記の発明では、分割苗載部を適正揺動操作位置に位置させた状態での揺動操作において、分割苗載部が不測に適正揺動操作位置から摺動変位する虞を招き難くすることができる。   In the above invention, in the swinging operation in a state where the divided seedling placing part is located at the proper swinging operation position, it is difficult to cause a risk that the split seedling placing part unexpectedly slides and displaces from the proper swinging operation position. Can do.

従って、苗載台の作業状態から収納状態への切り換えを更に簡便にすることができる。   Therefore, switching from the working state of the seedling stage to the storage state can be further simplified.

本発明の請求項６に係る発明は、上記請求項１〜５のいずれか一つに記載の発明において、
前記連結機構に、前記分割苗載部の機体横外方への摺動変位に伴って、前記苗載台を左右方向に移動可能に支持する支持部材から離れる方向に前記分割苗載部を変位させる変位操作手段を備えた。 The invention according to claim 6 of the present invention is the invention according to any one of claims 1 to 5,
The split seedling mounting portion is displaced in a direction away from a support member that supports the seedling mounting base so as to be movable in the left-right direction in accordance with the sliding displacement of the split seedling mounting portion in the laterally outward direction of the machine body. Displacement operation means is provided.

上記の発明では、分割苗載部を揺動変位させる段階では、分割苗載部が支持部材から離れていることから操作が軽くなる。   In the above invention, in the stage of swinging and displacing the divided seedling mounting portion, the operation becomes light because the divided seedling mounting portion is separated from the support member.

従って、苗載台の作業状態から収納状態への切り換えをより円滑に行うことができる。   Therefore, the switching from the working state of the seedling stage to the stored state can be performed more smoothly.

乗用田植機の全体左側面図である。It is the whole left side view of a riding rice transplanter. 苗植付装置の左側面図である。It is a left view of a seedling planting apparatus. 苗植付装置の平面図である。It is a top view of a seedling planting apparatus. 苗植付装置の正面図である。It is a front view of a seedling planting apparatus. 苗載台を左ストローク端に位置させた状態を示す苗植付装置の分割苗載部側の正面図である。It is a front view by the side of the division | segmentation seedling mounting part of the seedling planting apparatus which shows the state which has positioned the seedling mounting stand in the left stroke end. 分割苗載部の分離状態を示す苗植付装置の分割苗載部側の正面図である。It is a front view by the side of the division | segmentation seedling mounting part of the seedling planting apparatus which shows the isolation | separation state of a division | segmentation seedling mounting part. 苗載台の収納状態を示す苗植付装置の分割苗載部側の正面図である。It is a front view by the side of the division | segmentation seedling mounting part of the seedling planting apparatus which shows the accommodation state of a seedling mounting stand. 苗載台の収納状態を示す苗植付装置の左側面図である。It is a left view of the seedling planting apparatus which shows the accommodation state of a seedling stand. 苗載台の作業状態（ａ）と収納状態（ｂ）を示す苗載台の分割苗載部側の横断底面図である。It is a cross-sectional bottom view by the side of the division | segmentation seedling mounting part side of the seedling mounting stand which shows the working state (a) and storage state (b) of a seedling mounting stand. 分割苗載部の連接位置での位置決め状態（ａ）と収納位置での位置決め状態（ｂ）を示す苗載台の分割苗載部側の横断底面図である。It is a cross-sectional bottom view by the side of the division | segmentation seedling mounting part of the seedling mounting stand which shows the positioning state (a) in the connection position of a division | segmentation seedling mounting part, and the positioning state (b) in a storage position. 分割苗載部を揺動許容位置に位置させた状態での連結機構の動作状態を示す要部の横断底面図である。It is a cross-sectional bottom view of the principal part which shows the operation state of a connection mechanism in the state where the division seedling mounting part was located in the rocking | fluctuation permissible position. 分割苗載部を揺動許容位置で揺動変位させた状態での連結機構の動作状態を示す要部の横断底面図である。It is a cross-sectional bottom view of the principal part which shows the operation state of a connection mechanism in the state where the division seedling mounting part was rockingly displaced at the rocking allowable position. 分割苗載部を連接位置に位置させた状態での連結機構の動作状態（ａ）と分割苗載部を適正揺動操作位置に位置させた状態での連結機構の動作状態（ｂ）を示す連結機構の一部切り欠き正面図である。The operation state (a) of the connection mechanism in a state where the divided seedling placement part is located at the connection position and the operation state (b) of the connection mechanism in a state where the division seedling placement part is located at the proper swing operation position are shown. It is a partially cutaway front view of a connection mechanism. 主苗載部の分割端を示す主苗載部の左側面図である。It is a left view of the main seedling mounting part which shows the division | segmentation end of the main seedling mounting part. 分割苗載部の分割端を示す主苗載部の右側面図である。It is a right view of the main seedling mounting part which shows the division | segmentation end of a divided seedling mounting part. 下側のロック機構の構成を示す要部の右側面図である。It is a right view of the principal part which shows the structure of a lower side lock mechanism. 上側のロック機構の構成を示す要部の右側面図である。It is a right view of the principal part which shows the structure of an upper side locking mechanism. 下側のロック機構の作業状態と収納状態での動作を示す要部の右側面図である。It is a right view of the principal part which shows the operation | movement in the working state and accommodation state of a lower side lock mechanism. 上側のロック機構の作業状態と収納状態での動作を示す要部の右側面図である。It is a right view of the principal part which shows the operation | movement in the working state and accommodation state of an upper side locking mechanism. ロック機構のロック解除状態（ａ）とロック状態（ｂ）を示す要部の横断底面図である。It is a cross-sectional bottom view of the principal part which shows the lock release state (a) and lock state (b) of a lock mechanism. クッションゴムの非作用状態（ａ）と作用状態（ｂ）を示す要部の横断底面図である。It is a cross-sectional bottom view of the principal part which shows the non-action state (a) and action state (b) of cushion rubber. 扁平軸を使用した揺動許容手段の別実施形態を示す要部の一部横断平面図である。It is a partial cross-sectional top view of the principal part which shows another embodiment of the rocking | fluctuation permission means using a flat shaft. 上部扁平軸を使用した揺動許容手段の別実施形態を示す要部の一部横断平面図である。It is a partial cross-sectional top view of the principal part which shows another embodiment of the rocking | fluctuation permission means using an upper flat shaft. 上部扁平軸を使用した揺動許容手段の別実施形態を示す要部の分解斜視図である。It is a disassembled perspective view of the principal part which shows another embodiment of the rocking | fluctuation permission means using an upper flat shaft. 連結機構に保持手段を備えた別実施形態を示す要部の一部横断平面図である。It is a partial cross-sectional top view of the principal part which shows another embodiment provided with the holding means in the connection mechanism. 上下の連結機構を平行四連リンクとして機能させた別実施形態での作業状態を示す分割苗載部側の正面図である。It is a front view by the side of the division seedling mounting part which shows the working state in another embodiment which made the upper and lower connection mechanisms function as a parallel quadruple link. 上下の連結機構を平行四連リンクとして機能させた別実施形態での収納状態を示す分割苗載部側の正面図である。It is a front view by the side of the division seedling mounting part which shows the accommodation state in another embodiment which made the upper and lower connection mechanisms function as a parallel quadruple link.

以下、本発明を実施するための形態の一例として、本発明に係る田植機の苗載台分割構造を、田植機の一例である乗用田植機に適用した第１実施形態を図面に基づいて説明する。   Hereinafter, as an example of an embodiment for carrying out the present invention, a first embodiment in which a seedling mounting structure of a rice transplanter according to the present invention is applied to a riding rice transplanter that is an example of a rice transplanter will be described with reference to the drawings. To do.

図１に示すように、本実施形態で例示する乗用田植機は、走行車体１の後部にリンク機構２を油圧式の昇降シリンダ３の作動で上下揺動するように連結し、このリンク機構２の後端下部に８条用の苗植付装置４をローリング可能に連結して８条植え用に構成している。   As shown in FIG. 1, the riding rice transplanter exemplified in the present embodiment connects a link mechanism 2 to the rear part of a traveling vehicle body 1 so as to swing up and down by the operation of a hydraulic lifting cylinder 3. An eight-row seedling planting device 4 is connected to the lower end of the rear end so as to be capable of rolling, and is configured for eight-row planting.

走行車体１は、車体フレーム５の前部に搭載したエンジン６からの動力を、主変速装置として備えた静油圧式無段変速装置（図示せず）、及び、トランスミッションケース（以下、Ｔ／Ｍケースと称する）７に副変速装置として内蔵したギア式変速装置（図示せず）、などを介して左右の前輪８及び左右の後輪９に伝達する４輪駆動型に構成している。エンジン６の後方には、前輪操舵用のステアリングホイール１０及び運転座席１１などを配備して搭乗運転部１２を形成している。走行車体１における前部の左右両横側方箇所には、４枚の予備苗を上下方向に所定間隔をあけて載置する予備苗載装置１３を立設している。   The traveling vehicle body 1 includes a hydrostatic continuously variable transmission (not shown) having power from an engine 6 mounted on the front portion of the vehicle body frame 5 as a main transmission, and a transmission case (hereinafter referred to as T / M). (Referred to as a case) 7 is configured as a four-wheel drive type that transmits to the left and right front wheels 8 and the left and right rear wheels 9 via a gear-type transmission (not shown) built in as an auxiliary transmission. On the rear side of the engine 6, a steering wheel 10 for driving a front wheel, a driver's seat 11, and the like are arranged to form a boarding operation unit 12. On the left and right lateral sides of the front portion of the traveling vehicle body 1, a preliminary seedling placement device 13 is provided for placing four preliminary seedlings in the vertical direction at a predetermined interval.

図１〜４に示すように、苗植付装置４は、リンク機構２に連結する動力分配ケース１４、８条分のマット状苗を載置することが可能な状態に８条分の苗載面１５ａを区画形成した苗載台１５、苗載台１５を一定ストロークで左右方向に往復移動させる横送り機構１６、苗載台１５が左右のストローク端に達するごとに苗載台上の各マット状苗を苗載台１５の下端に向けて所定ピッチで縦送りする縦送り機構１７、苗載台１５に載置した各マット状苗の下端から所定量ずつの苗を切り取って圃場の泥土部に植え付けることが可能な状態に左右方向に一定間隔をあけて配置した８基のロータリ式の植付機構１８、及び、走行車体１の走行に伴って圃場を滑走することにより苗植え付け予定箇所などの圃場泥面を整地する５つの整地フロート１９、などを植付フレーム２０に装備して最大８条の苗の植え付けを行えるように構成している。   As shown in FIGS. 1 to 4, the seedling planting device 4 is configured so that the power distribution case 14 connected to the link mechanism 2 and the eight mat matted seedlings can be placed. The seedling table 15 having the surface 15a defined, the lateral feed mechanism 16 that reciprocates the seedling table 15 in the left-right direction with a fixed stroke, and each mat on the seedling table each time the seedling table 15 reaches the left and right stroke ends. A vertical feed mechanism 17 that vertically feeds the seedlings toward the lower end of the seedling stage 15 at a predetermined pitch, and a predetermined amount of seedlings are cut out from the lower end of each mat-like seedling placed on the seedling stage 15, and the mud portion of the field The eight rotary-type planting mechanisms 18 arranged at regular intervals in the left-right direction so that they can be planted in the plant, and the planting planting planned locations by sliding the field as the traveling vehicle body 1 travels 5 leveling floats 19 to level the field mud surface of It is configured to allow the planting of up to Article 8 of the seedlings equipped with etc. to planting frame 20.

動力分配ケース１４には、Ｔ／Ｍケース７が出力する植え付け作業用の動力を受け取って、横送り機構１６、縦送り機構１７、及び、各植付機構１８に分配供給する動力分配機構（図示せず）を内蔵している。   The power distribution case 14 receives power for planting work output from the T / M case 7, and distributes and supplies the power to the horizontal feed mechanism 16, the vertical feed mechanism 17, and each planting mechanism 18 (see FIG. (Not shown).

植付フレーム２０は、苗植付装置４の前下部に左右向きに配備した角パイプ状の主支持部材２１、苗載台１５の上部側を左右方向に往復移動可能な状態で支持するように主支持部材２１に前傾姿勢で立設した門型の苗載台支持フレーム２２、及び、左右方向に一定間隔をあけた状態で主支持部材２１から後方に向けて延出した支持部材兼用の４つの植付伝動ケース２３、などから構成している。   The planting frame 20 supports the square pipe-shaped main support member 21 arranged in the left-right direction at the front lower part of the seedling planting device 4 and the upper side of the seedling mounting base 15 in a state in which the plant can be reciprocated in the left-right direction. A gate-shaped seedling support frame 22 standing upright on the main support member 21 and a support member that extends rearward from the main support member 21 with a predetermined interval in the left-right direction. It consists of four planting transmission cases 23 and the like.

図１〜８に示すように、苗載台１５と植付フレーム２０との間には、苗植え付け作業時に、苗載面１５ａと交差する方向への苗載台１５の変位を阻止した状態で苗載台１５を左右方向に移動案内する上側ガイド機構２４と下側ガイド機構２５とを備えている。   As shown in FIGS. 1-8, between the seedling stage 15 and the planting frame 20, in the state which prevented the displacement of the seedling stage 15 to the direction which cross | intersects the seedling mounting surface 15a at the time of seedling planting operation. An upper guide mechanism 24 and a lower guide mechanism 25 for moving and guiding the seedling mounting table 15 in the left-right direction are provided.

上側ガイド機構２４は、苗載台１５における背面の上部側に苗載台１５の左右両端部にわたる左右向き姿勢で固定した断面形状が下向きＵ字状の上側摺接部材２６、苗載台支持フレーム２２の上端部に左右方向に所定間隔をあけた状態で苗載台１５の下部側部分に沿う前傾姿勢で配備した６本の支軸２７、及び、各支軸２７の上端部に相対回転可能に外嵌装備した６個のガイドローラ２８、などを備えている。そして、上側摺接部材２６の左右両端にわたる状態で上側摺接部材２６に備えた係合溝２６ａに各ガイドローラ２８が係入するように各ガイドローラ２８に対して上側摺接部材２６を上方から外嵌することにより、各ガイドローラ２８が上側摺接部材２６の苗載面１５ａと交差する方向への変位を阻止しながら左右方向への移動を許容する状態が得られるようにしている。これにより、上側ガイド機構２４を、苗植え付け作業時に苗載面１５ａと交差する方向への苗載台１５の変位を阻止しながら苗載台１５を左右方向に移動案内する状態に構成している。   The upper guide mechanism 24 includes an upper slidable contact member 26 having a downward U-shaped cross-section fixed to the upper side of the rear surface of the seedling platform 15 in a lateral orientation across the left and right ends of the seedling platform 15, and a seedling platform support frame. Relative rotation to the six support shafts 27 arranged in a forward inclined posture along the lower side portion of the seedling table 15 with a predetermined interval in the left-right direction at the upper end portion of 22 and the upper end portion of each support shaft 27 Six guide rollers 28 that are externally fitted are provided. Then, the upper slidable contact member 26 is moved upward with respect to each guide roller 28 so that each guide roller 28 is engaged with the engagement groove 26a provided in the upper slidable contact member 26 in a state extending to both left and right ends of the upper slidable contact member 26. By fitting outside, the guide roller 28 is allowed to move in the left-right direction while preventing the displacement of the upper sliding contact member 26 in the direction intersecting the seedling mounting surface 15a. Thereby, the upper side guide mechanism 24 is comprised in the state which moves and guides the seedling mounting base 15 to the left-right direction, preventing the displacement of the seedling mounting base 15 to the direction which cross | intersects the seedling mounting surface 15a at the time of seedling planting work. .

下側ガイド機構２５は、苗載台１５における背面の下部側に苗載台１５の左右両端部にわたる左右向き姿勢で固定したアルミ押出材などからなる下側摺接部材２９、及び、下側摺接部材２９の下方からの受け止め支持が可能な左右向き姿勢で所定の植付伝動ケース２３に支持させたアルミ押出材などからなる摺動レール（支持部材）３０、などを備えている。摺動レール３０は、苗載台１５に載置したマット状苗の下端を受け止め支持し、かつ、下側摺接部材２９を受け止め支持する。又、左右方向に植付機構１８の配置間隔と同じ一定間隔をあけた所定位置に、各植付機構１８による苗の取り出しを可能にする８つの苗取出口３０ｃを形成している。下側摺接部材２９は、摺動レール３０によって苗縦送り方向の荷重と苗載面１５ａと交差する方向の荷重とが受け止められた状態で左右方向に摺動するように摺動レール３０に載置している。又、下側摺接部材２９には、摺動レール３０との当接により、下側摺接部材２９の苗載面１５ａと交差する方向での摺動レール３０からの浮き上がりを防止する浮上り防止板３１を連結装備している。これにより、下側ガイド機構２５を、苗植え付け作業時に苗載面１５ａと交差する方向への苗載台１５の変位を阻止しながら苗載台１５を左右方向に円滑に移動案内する状態に構成している。   The lower guide mechanism 25 includes a lower sliding contact member 29 made of an aluminum extruded material or the like that is fixed to the lower side of the rear surface of the seedling mounting table 15 in a left-right orientation across the left and right ends of the seedling mounting table 15, and a lower sliding member. A sliding rail (supporting member) 30 made of an aluminum extruded material or the like supported by a predetermined planting transmission case 23 in a left-right orientation capable of receiving and supporting the contact member 29 from below is provided. The slide rail 30 receives and supports the lower end of the mat-like seedling placed on the seedling mount 15 and receives and supports the lower sliding contact member 29. In addition, eight seedling extraction outlets 30c that allow the seedlings to be taken out by the respective planting mechanisms 18 are formed at predetermined positions spaced apart from each other by the same spacing as the arrangement intervals of the planting mechanisms 18 in the left-right direction. The lower sliding contact member 29 is attached to the sliding rail 30 so as to slide in the left-right direction in a state where the load in the seedling vertical feed direction and the load in the direction intersecting the seedling mounting surface 15a are received by the sliding rail 30. It is placed. Further, the lower sliding contact member 29 is brought into contact with the sliding rail 30 to prevent the lifting from the sliding rail 30 in the direction intersecting the seedling mounting surface 15a of the lower sliding contact member 29. The prevention plate 31 is connected and equipped. Accordingly, the lower guide mechanism 25 is configured to smoothly move and guide the seedling stage 15 in the left-right direction while preventing the displacement of the seedling stage 15 in the direction intersecting the seedling mounting surface 15a during the seedling planting operation. doing.

図１〜１０に示すように、苗載台１５は、６条分の苗載面１５ａを区画形成した右側の主苗載部１５Ａと、２条分の苗載面１５ａを区画形成した左側の分割苗載部１５Ｂとに左右に分割可能な２分割構造に構成している。そして、主苗載部１５Ａと分割苗載部１５Ｂとを、主苗載部１５Ａに対する分割苗載部１５Ｂの左右方向への摺動変位と上下方向への揺動変位とを許容する状態に上下一対の連結機構３４を介して連結することにより、主苗載部１５Ａと分割苗載部１５Ｂとを左右に連接した作業状態と、作業状態よりも苗載台１５の左右幅を狭くした収納状態とに切り換え可能な分割収納式に構成している。   As shown in FIGS. 1 to 10, the seedling mounting table 15 includes a right main seedling mounting portion 15 </ b> A in which six seedling mounting surfaces 15 a are partitioned and a left side in which two seedling mounting surfaces 15 a are partitioned. It is configured in a two-divided structure that can be divided into the divided seedling mounting portion 15B on the left and right. Then, the main seedling placing part 15A and the divided seedling placing part 15B are moved up and down to allow the sliding displacement in the left-right direction and the swinging displacement in the vertical direction with respect to the main seedling placing part 15A. A working state in which the main seedling placement part 15A and the divided seedling placement part 15B are connected to the left and right by being connected via a pair of connection mechanisms 34, and a storage state in which the lateral width of the seedling placement base 15 is narrower than the working state. It is configured as a separate storage type that can be switched between.

図２及び図４〜１３に示すように、各連結機構３４は、左右向き姿勢で主苗載部１５Ａの左端部から左外方に延出する状態に主苗載部１５Ａに固定した断面形状がコの字状の固定部材３５と、固定部材３５に左右方向への摺動が可能は状態で内嵌する左右向き姿勢で断面形状がコの字状の可動部材３６とを備えている。各固定部材３５は、その延出端部である左端部に苗載台１５の下部側部分に沿う前傾姿勢の支軸３７を装備している。各可動部材３６は、固定部材３５との連結側である右側部分に左右向きの長孔３６ａを形成している。又、その左端部に、苗載台１５の下部側部分に沿う前傾姿勢の支軸３８を介して分割苗載部１５Ｂを枢支連結している。そして、固定部材３５に装備する支軸３７を、可動部材３６に形成した上下の長孔３６ａに挿通して固定部材３５に固定することにより、固定部材３５に対する可動部材３６の左右摺動と支軸３７を支点にした起伏揺動とが可能な状態に固定部材３５と可動部材３６とを連結している。   As shown in FIGS. 2 and 4 to 13, each coupling mechanism 34 is fixed to the main seedling placement portion 15 </ b> A so as to extend leftward from the left end portion of the main seedling placement portion 15 </ b> A in a left-right orientation. Is provided with a U-shaped fixed member 35 and a movable member 36 having a U-shaped cross-section in a left-right orientation that fits inside the fixed member 35 in a state in which it can slide in the left-right direction. Each fixing member 35 is equipped with a support shaft 37 in a forward inclined posture along the lower side portion of the seedling table 15 at the left end portion which is an extended end portion thereof. Each movable member 36 has a left and right elongated hole 36 a formed on the right side, which is the side connected to the fixed member 35. Further, the split seedling mounting portion 15B is pivotally connected to the left end portion thereof via a support shaft 38 that is inclined forward along the lower side portion of the seedling mounting table 15. Then, the support shaft 37 provided on the fixed member 35 is inserted into the upper and lower elongated holes 36 a formed in the movable member 36 and fixed to the fixed member 35, so that the movable member 36 slides and supports the fixed member 35. The fixed member 35 and the movable member 36 are connected in a state in which the rocking motion with the shaft 37 as a fulcrum is possible.

これにより、各連結機構３４は、その固定部材３５に対する可動部材３６の左右摺動によって分割苗載部１５Ｂを左右方向に摺動変位させ、かつ、固定部材３５に対する可動部材３６の支軸３７を支点にした起伏揺動によって分割苗載部１５Ｂを上下方向に揺動変位させるように構成している。そして、この構成から、苗載台１５の収納状態では、分割苗載部１５Ｂが主苗載部１５Ａと平行な姿勢で主苗載部１５Ａの苗載面１５ａの上方に重なるように主苗載部側に寄せ上げられて所定の収納位置に位置する状態となり、これにより、作業状態よりも苗載台１５の左右幅を狭くすることができる。   As a result, each coupling mechanism 34 slides and displaces the divided seedling mounting portion 15B in the left-right direction by sliding the movable member 36 relative to the fixed member 35 in the left-right direction, and moves the support shaft 37 of the movable member 36 relative to the fixed member 35. The divided seedling mounting portion 15B is configured to be displaced in the up-and-down direction by undulating and swinging as a fulcrum. And from this structure, in the storage state of the seedling mounting stand 15, the main seedling mounting is such that the divided seedling mounting portion 15B overlaps the seedling mounting surface 15a of the main seedling mounting portion 15A in a posture parallel to the main seedling mounting portion 15A. It is brought up to the part side and it will be in the state located in a predetermined | prescribed storage position, and, thereby, the left-right width of the seedling mounting base 15 can be made narrower than a working state.

各連結機構３４には、分割苗載部１５Ｂを所定の収納位置に位置させるための分割苗載部１５Ｂの適正揺動支点位置Ｐ１と適正揺動操作位置Ｐ２とを設定している。適正揺動支点位置Ｐ１は、主苗載部１５Ａの分割端よりも機体横外側の位置に設定してあり、この位置に連結機構３４の支軸３７を配備している。適正揺動操作位置Ｐ２は、支軸３７との当接により可動部材３６の左外方への摺動を制限する当接部ａである可動部材３６の各長孔３６ａの右端部ａが支軸３７に当接したときに得られる分割苗載部１５Ｂの左摺動限界位置に設定している。   In each coupling mechanism 34, an appropriate swinging fulcrum position P1 and an appropriate swinging operation position P2 of the split seedling mounting part 15B for setting the split seedling mounting part 15B at a predetermined storage position are set. The proper swinging fulcrum position P1 is set at a position laterally outside the machine body from the divided end of the main seedling mounting portion 15A, and the support shaft 37 of the coupling mechanism 34 is provided at this position. The proper swinging operation position P2 is supported by the right end portion a of each elongated hole 36a of the movable member 36, which is a contact portion a that restricts sliding of the movable member 36 to the left outward by contact with the support shaft 37. It is set to the left sliding limit position of the divided seedling mounting portion 15B obtained when it comes into contact with the shaft 37.

つまり、主苗載部１５Ａに連接する分割苗載部１５Ｂを、可動部材３６の各長孔３６ａの右端部ａが支軸３７に当接する適正揺動操作位置Ｐ２まで左外方に摺動変位させた後、適正揺動支点位置Ｐ１に位置する支軸３７を支点にして上方に揺動変位させることにより、分割苗載部１５Ｂを所定の収納位置に位置させることができるように構成している。   That is, the split seedling mounting portion 15B connected to the main seedling mounting portion 15A is slid to the left outward to the proper swing operation position P2 where the right end a of each elongated hole 36a of the movable member 36 contacts the support shaft 37. After that, the divided seedling mounting portion 15B can be positioned at a predetermined storage position by swinging and displacing upward with the support shaft 37 located at the proper swing fulcrum position P1 as a fulcrum. Yes.

図９〜１２に示すように、各連結機構３４には、分割苗載部１５Ｂが適正揺動操作位置Ｐ２に到達する以前からの分割苗載部１５Ｂの揺動変位を許容する揺動許容手段８０と、分割苗載部１５Ｂが主苗載部１５Ａに連接する連接位置Ｐ０から連接位置Ｐ０と適正揺動操作位置Ｐ２との間に設定した揺動許容位置Ｐ３に到達するまでの間において分割苗載部１５Ｂの揺動変位を阻止する揺動規制手段８１とを備えている。   As shown in FIGS. 9 to 12, each coupling mechanism 34 has a swing permission means for allowing the swinging displacement of the divided seedling mounting portion 15B before the split seedling mounting portion 15B reaches the proper swinging operation position P2. 80 and the split seedling placement portion 15B is divided from the connection position P0 connected to the main seedling placement portion 15A to the swing allowable position P3 set between the connection position P0 and the proper swing operation position P2. And a rocking restriction means 81 for preventing the rocking displacement of the seedling mounting portion 15B.

各固定部材３５には、可動部材３６の左右摺動を許容する状態で可動部材３６の倒伏方向下手側から可動部材３６を受け止め支持する支持部３５Ａを形成している。   Each fixed member 35 is formed with a support portion 35A that receives and supports the movable member 36 from the lower side in the lying down direction of the movable member 36 while allowing the movable member 36 to slide left and right.

各連結機構３４においては、分割苗載部１５Ｂが揺動許容位置Ｐ３に位置するときの支軸３７の中心位置に対応する可動部材３６の摺動方向での所定箇所を境界位置Ｐａに設定して、可動部材３６における境界位置Ｐａから分割苗載部側の部分に支持部３５により受け止め支持される被支持部３６Ａを形成することにより揺動規制手段８１を構成している。又、可動部材３６における境界位置Ｐａから主苗載部側の部分に支持部３５Ａとの間に隙間を確保して可動部材３６の起伏揺動を許容する切欠部３６Ｂを形成することにより揺動許容手段８０を構成している。   In each coupling mechanism 34, a predetermined position in the sliding direction of the movable member 36 corresponding to the center position of the support shaft 37 when the divided seedling mounting portion 15B is located at the swing allowable position P3 is set as the boundary position Pa. Thus, the swing restricting means 81 is configured by forming a supported portion 36A that is received and supported by the support portion 35 from the boundary position Pa of the movable member 36 to the portion on the divided seedling placement portion side. Further, the movable member 36 is rocked by forming a notch 36B that allows the rocking movement of the movable member 36 by securing a gap between the support member 35A and the portion on the main seedling placement side from the boundary position Pa in the movable member 36. Permitting means 80 is configured.

上記の構成から、苗載台１５を作業状態から収納状態に切り換えるときには、分割苗載部１５Ｂを連結位置Ｐ０から適正揺動操作位置Ｐ２に確実に摺動変位させなくても、分割苗載部１５Ｂが揺動許容位置Ｐ３に到達した段階から分割苗載部１５Ｂを収納位置に向けて揺動変位させることができる。つまり、分割苗載部１５Ｂの摺動操作と揺動操作とが完全に区切られた２段階操作ではなく、分割苗載部１５Ｂの摺動操作から揺動操作への移行を円滑に行える一連の操作で分割苗載部１５Ｂを収納位置に向けて移動させることができ、これにより、苗載台１５を作業状態から収納状態に切り換える際の操作性を向上させることができる。   From the above configuration, when the seedling stage 15 is switched from the working state to the housed state, the divided seedling part 15B is not required to be slid and displaced from the connecting position P0 to the proper swinging operation position P2 when the divided seedling part 15B is securely moved. The divided seedling placing portion 15B can be oscillated and displaced toward the storage position from the stage when 15B reaches the oscillating allowable position P3. That is, instead of a two-stage operation in which the sliding operation and swinging operation of the divided seedling mounting part 15B are completely separated, a series of operations that can smoothly shift from the sliding operation of the divided seedling mounting part 15B to the swinging operation. The divided seedling mounting portion 15B can be moved toward the storage position by the operation, whereby the operability when the seedling mounting base 15 is switched from the working state to the storage state can be improved.

又、可動部材３６の境界位置Ｐａを、分割苗載部１５Ｂが適正揺動操作位置Ｐ２に到達する以前の分割苗載部１５Ｂの揺動変位によって分割苗載部１５Ｂが主苗載部１５Ａなどに接触する虞のない位置に設定しておけば、苗載台１５を作業状態から収納状態に切り換える際の操作性を向上させながら、その切り換えの際に分割苗載部１５Ｂが主苗載部１５Ａなどに接触することに起因した損傷を未然に回避することができる。   Further, the divided seedling mounting portion 15B is moved to the boundary position Pa of the movable member 36 by the swinging displacement of the divided seedling mounting portion 15B before the divided seedling mounting portion 15B reaches the proper swinging operation position P2. If the position is set so that there is no risk of contact with the seedling stand, the split seedling placing portion 15B is used as the main seedling placing portion at the time of switching while improving the operability when the seedling placing stand 15 is switched from the working state to the stored state. Damage caused by contact with 15A or the like can be avoided in advance.

各連結機構３４には、分割苗載部１５Ｂが適正揺動操作位置Ｐ２に到達する以前での分割苗載部１５ｂの収納位置に向けた揺動変位に伴って、分割苗載部１５Ｂが適正揺動操作位置Ｐ２に到達した状態が得られるように分割苗載部１５Ｂを摺動案内する案内手段８３を備えている。案内手段８３は、可動部材３６の右端部において、分割苗載部１５ｂの収納位置への揺動変位に伴って固定部材３５の支持部３５Ａに摺接することにより、分割苗載部１５Ｂを適正揺動操作位置Ｐ２に向けて押し上げる状態に形成したカム３６Ｃにより構成している。   In each coupling mechanism 34, the divided seedling mounting portion 15B is appropriately attached in accordance with the swinging displacement toward the storage position of the divided seedling mounting portion 15b before the divided seedling mounting portion 15B reaches the proper swinging operation position P2. Guide means 83 for slidingly guiding the divided seedling mounting portion 15B is provided so as to obtain a state of reaching the swing operation position P2. The guide means 83 slides on the support portion 35A of the fixed member 35 at the right end portion of the movable member 36 along with the swinging displacement of the split seedling mounting portion 15b to the storage position, thereby appropriately swinging the split seedling mounting portion 15B. The cam 36C is formed so as to be pushed up toward the dynamic operation position P2.

これにより、苗載台１５を作業状態から収納状態に切り換える際の操作性を向上させながら、苗載台１５を収納位置に確実に位置させることができる。   Thereby, the seedling stage 15 can be reliably positioned at the storage position while improving the operability when switching the seedling stage 15 from the working state to the storage state.

図４〜１０に示すように、苗載台１５の作業状態と収納状態との切り換えは、苗載台１５を左側のストローク端に位置させた状態で行い、収納状態では、分割苗載部１５Ｂの分割端に位置する苗載面１５ａが主苗載部１５Ａの分割端に位置する苗載面１５ａの上方に重なる状態で位置するように構成している。そのため、収納状態では、苗載台１５の左右幅を、作業状態よりも約１面分の苗載面１５ａの左右幅を減少させた状態にすることができる。   As shown in FIGS. 4 to 10, switching between the working state and the storage state of the seedling stage 15 is performed in a state where the seedling stage 15 is positioned at the left stroke end. The seedling placement surface 15a located at the divided end of the main seedling placement portion 15A is positioned so as to overlap the seedling placement surface 15a located at the divided end of the main seedling placement portion 15A. Therefore, in the housed state, the lateral width of the seedling mounting table 15 can be set to a state in which the lateral width of the seedling mounting surface 15a for about one surface is reduced compared to the working state.

図１〜８及び図１３に示すように、苗載台１５に装備する上側ガイド機構２４の上側摺接部材２６及び下側ガイド機構２５の下側摺接部材２９は、苗載台１５と同様に、主苗載部１５Ａに装備する主被支持部２６Ａ，２９Ａと分割苗載部１５Ａに装備する分割被支持部２６Ｂ，２９Ｂとに分割可能な２分割構造に構成している。   As shown in FIGS. 1 to 8 and 13, the upper sliding contact member 26 of the upper guide mechanism 24 and the lower sliding contact member 29 of the lower guide mechanism 25 provided on the seedling mounting base 15 are the same as those of the seedling mounting base 15. The main supported parts 26A and 29A equipped in the main seedling placing part 15A and the divided supported parts 26B and 29B equipped in the divided seedling placing part 15A are divided into two parts.

そして、前述したように、苗載台１５の作業状態と収納状態との切り換えは、苗載台１５を左側のストローク端に位置させた状態で行い、又、分割苗載部１５Ｂの揺動変位は、分割苗載部１５Ｂを少なくとも揺動許容位置Ｐ３まで摺動変位させた後に行うように構成している。   As described above, the switching between the working state and the storage state of the seedling stage 15 is performed with the seedling stage 15 positioned at the left stroke end, and the swinging displacement of the divided seedling stage 15B is also performed. Is configured to be performed after the divided seedling mounting portion 15B is slid and displaced to at least the swing allowable position P3.

そのため、上側摺接部材２６の分割被支持部２６Ｂは、苗載台１５を左側のストローク端に位置させて分割苗載部１５Ｂを揺動許容位置Ｐ３以上に摺動変位させた状態において、苗載面１５ａと交差する方向でガイドローラ２８と対向する箇所に、ガイドローラ２８の苗載面１５ａと交差する方向への相対変位を許容する切欠部２６ｂを形成している。   For this reason, the divided supported portion 26B of the upper sliding contact member 26 has a seedling placement base 15 positioned at the left stroke end and the divided seedling placement portion 15B is slid and displaced to the swing allowable position P3 or more. A notch 26b that allows relative displacement of the guide roller 28 in a direction crossing the seedling mounting surface 15a is formed at a position facing the guide roller 28 in a direction crossing the mounting surface 15a.

又、各連結機構３４の固定部材３５及び可動部材３６には、可動部材３６の固定部材３５から離れる左方への摺動に伴って、可動部材３６を苗縦送り方向と反対の方向に持ち上げる状態に摺動案内することにより、前述した浮上り防止板３１を摺動レール３０の第２支持部３０ｂから苗縦送り方向と反対の方向に離れさせて、浮上り防止板３１による下側摺接部材２９の苗載面１５ａと交差する方向での摺動レール３０からの浮き上がり防止を解除する乗り上がり傾斜面３５Ｃ，３６Ｃと、その浮き上がり防止の解除状態を維持する乗り上げ平坦面３５Ｄ，３６Ｄとを備えている。   In addition, the fixed member 35 and the movable member 36 of each coupling mechanism 34 lift the movable member 36 in the direction opposite to the seedling longitudinal feed direction as the movable member 36 slides leftward away from the fixed member 35. By sliding and guiding to the state, the above-described lift prevention plate 31 is moved away from the second support portion 30b of the slide rail 30 in the direction opposite to the seedling vertical feed direction, and the bottom slide by the lift prevention plate 31 is performed. Riding inclined surfaces 35C and 36C for releasing the lifting prevention from the slide rail 30 in the direction intersecting the seedling mounting surface 15a of the contact member 29, and the riding flat surfaces 35D and 36D for maintaining the lifting prevention releasing state. It has.

つまり、上側摺接部材２６の分割被支持部２６Ｂに形成した切欠部２６ｂ、及び、各連結機構３４の固定部材３５及び可動部材３６に備えた乗り上げ平坦面３５Ｄ，３６Ｄにより、苗載台１５の作業状態と収納状態との切り換え時に分割苗載部１５Ｂの苗載面１５ａと交差する方向への変位を許容する変位許容部４０を構成している。又、各連結機構３４の乗り上がり傾斜面３５Ｃ，３６Ｃと乗り上げ平坦面３５Ｄ，３６Ｄにより、分割苗載部１５Ｂの機体横外方への摺動変位に伴って、苗載台１５を左右方向に移動可能に支持する摺動レール３０から離れる方向に分割苗載部１５Ｂを変位させる変位操作手段６０を構成している。   That is, the cutout portion 26b formed in the divided supported portion 26B of the upper sliding contact member 26 and the climbing flat surfaces 35D and 36D provided in the fixed member 35 and the movable member 36 of each coupling mechanism 34, A displacement permitting portion 40 is configured to permit displacement in a direction intersecting the seedling mounting surface 15a of the divided seedling mounting portion 15B when switching between the working state and the storage state. Further, the climbing inclined surfaces 35C and 36C and the climbing flat surfaces 35D and 36D of the respective coupling mechanisms 34 cause the seedling platform 15 to move in the left-right direction along with the sliding displacement of the divided seedling platform 15B to the lateral side of the machine body. Displacement operation means 60 is configured to displace the divided seedling mounting portion 15B in a direction away from the slide rail 30 that is movably supported.

図５〜２０に示すように、主苗載部１５Ａの分割端には、その上部側に位置する第１接続部材４１と下部側に位置する第２接続部材４２とを備えている。分割苗載部１５Ｂの分割端には、その上部側に位置する第１接続部材４５と下部側に位置する第２接続部材４６とを備えている。   As shown in FIGS. 5 to 20, the split end of the main seedling mounting portion 15 </ b> A includes a first connection member 41 located on the upper side and a second connection member 42 located on the lower side. At the divided end of the divided seedling mounting portion 15B, a first connecting member 45 located on the upper side and a second connecting member 46 located on the lower side are provided.

主苗載部１５Ａの第１接続部材４１には１つの位置決め孔４１ａを、第２接続部材４２には２つの位置決め孔４２ａ，４２ｂを形成している。分割苗載部１５Ｂの第１接続部材４５には、右方に突出する１つの位置決めピン４５ａを、第２接続部材４６には、右方に突出する２つの位置決めピン４６ａ，４６ｂを備えている。そして、主苗載部１５Ａの各位置決め孔４１ａ，４２ａ，４２ｂに分割苗載部１５Ｂの対応する位置決めピン４５ａ，４６ａ，４６ｂを挿通することにより、分割苗載部１５Ｂを、主苗載部１５Ａと左右に連接する状態となる所定の作業位置に位置決めすることができる。   One positioning hole 41a is formed in the first connecting member 41 of the main seedling mounting portion 15A, and two positioning holes 42a and 42b are formed in the second connecting member 42. The first connecting member 45 of the divided seedling mounting portion 15B includes one positioning pin 45a that protrudes to the right, and the second connecting member 46 includes two positioning pins 46a and 46b that protrude to the right. . Then, by inserting the corresponding positioning pins 45a, 46a, 46b of the divided seedling mounting part 15B into the positioning holes 41a, 42a, 42b of the main seedling mounting part 15A, the divided seedling mounting part 15B is replaced with the main seedling mounting part 15A. And can be positioned at a predetermined work position that is connected to the left and right.

又、分割苗載部１５Ｂの各接続部材４５，４６には、主苗載部１５Ａの分割端に位置する苗載面１５ａと分割苗載部１５Ｂの分割端に位置する苗載面１５ａとの作業状態での離間距離を、主苗載部１５Ａ及び分割苗載部１５Ｂのそれぞれにおける隣接する苗載面１５ａの離間距離と同じに維持する除下一対のスペーサ４５Ａ，４５Ｂ，４６Ａ，４６Ｂを備えている。   Each of the connection members 45 and 46 of the divided seedling mounting portion 15B includes a seedling mounting surface 15a positioned at the split end of the main seedling mounting portion 15A and a seedling mounting surface 15a positioned at the split end of the split seedling mounting portion 15B. A pair of lowering spacers 45A, 45B, 46A, and 46B that maintain the separation distance in the working state to be the same as the separation distance between adjacent seedling placement surfaces 15a in the main seedling placement part 15A and the divided seedling placement part 15B are provided. ing.

苗載台１５には、その作業状態において主苗載部１５Ａの第１接続部材４１と分割苗載部１５Ｂの第１接続部材４５とを連結する第１ロック機構５１、及び、主苗載部１５Ａの第２接続部材４２と分割苗載部１５Ｂの第２接続部材４６とを連結する第２ロック機構５２を備えている。   The seedling stage 15 includes a first lock mechanism 51 that connects the first connection member 41 of the main seedling part 15A and the first connection member 45 of the divided seedling part 15B in the working state, and a main seedling part. A second locking mechanism 52 is provided to connect the second connecting member 42 of 15A and the second connecting member 46 of the divided seedling mounting portion 15B.

各ロック機構５１，５２は、主苗載部１５Ａ及び分割苗載部１５Ｂの表面側に作用して主苗載部１５Ａと分割苗載部１５Ｂとを左右に連接した状態に固定保持する表面側ロック具５３，５４と、主苗載部１５Ａ及び分割苗載部１５Ｂの裏面側に作用して主苗載部１５Ａと分割苗載部１５Ｂとを左右に連接した状態に固定保持する裏面側ロック具５５，５６とを、連結部材５７，５８により連動連結する状態に連結部材５７，５８に一体形成して構成している。   Each lock mechanism 51, 52 acts on the surface side of the main seedling mounting portion 15A and the divided seedling mounting portion 15B, and fixes and holds the main seedling mounting portion 15A and the divided seedling mounting portion 15B in a state where they are connected to the left and right. Back side lock that acts on the back side of the lock tools 53, 54 and the main seedling placement part 15A and the divided seedling placement part 15B to fix and hold the main seedling placement part 15A and the divided seedling placement part 15B in a state where they are connected to the left and right. The tools 55 and 56 are integrally formed with the connecting members 57 and 58 so as to be interlocked and connected by the connecting members 57 and 58.

又、各ロック機構５１，５２は板バネからなり、各ロック具５３〜５６は断面Ｕ字状に屈曲形成している。そして、分割苗載部１５Ｂの対応する接続部材４５，４６に揺動操作可能に備えている。   Each of the lock mechanisms 51 and 52 is made of a leaf spring, and each of the lock members 53 to 56 is bent in a U-shaped cross section. And the corresponding connection members 45 and 46 of the divided seedling mounting portion 15B are provided so as to be swingable.

第１ロック機構５１の表面側ロック具５３は、主苗載部１５Ａにおける第１接続部材４１の表面側に備えた被挟持部位４１Ａと、分割苗載部１５Ｂにおける第１接続部材４５の表面側に備えた被挟持部位としてのスペーサ４５Ａとを挟持して、主苗載部１５Ａの第１接続部材４１と分割苗載部１５Ｂの第１接続部材４５との表面側を接合保持した状態をロック状態とする挟持式に構成している。そして、表面側ロック具５３には操作部５３Ａを備えている。   The front-side locking device 53 of the first locking mechanism 51 includes a sandwiched portion 41A provided on the surface side of the first connection member 41 in the main seedling placement portion 15A and the surface side of the first connection member 45 in the divided seedling placement portion 15B. The spacer 45A as a sandwiched portion provided in the case is clamped, and the state in which the surface side of the first connection member 41 of the main seedling placement portion 15A and the first connection member 45 of the divided seedling placement portion 15B is bonded and held is locked. It is configured to be in a clamping manner. The front side locking device 53 includes an operation portion 53A.

第１ロック機構５１の裏面側ロック具５５は、主苗載部１５Ａにおける第１接続部材４１の裏面側に備えた被挟持部位４１Ｂと、分割苗載部１５Ｂにおける第１接続部材４５の裏面側に備えた被挟持部位としてのスペーサ４５Ｂとを挟持して、主苗載部１５Ａの第１接続部材４１と分割苗載部１５Ｂの第１接続部材４５との裏面側を接合保持した状態をロック状態とする挟持式に構成している。   The back surface side locking device 55 of the first lock mechanism 51 includes a sandwiched portion 41B provided on the back surface side of the first connection member 41 in the main seedling mounting portion 15A and the back surface side of the first connection member 45 in the divided seedling mounting portion 15B. The spacer 45B as a sandwiched portion provided in the case is clamped, and the state in which the back side of the first connection member 41 of the main seedling mounting part 15A and the first connection member 45 of the divided seedling mounting part 15B is bonded and held is locked. It is configured to be in a clamping manner.

そして、第１ロック機構５１の表面側ロック具５３及び裏面側ロック具５５は、表面側ロック具５３のロック位置への揺動操作に伴って裏面側ロック具５５がロック位置に揺動変位し、又、表面側ロック具５３のロック解除位置への揺動操作に伴って裏面側ロック具５５がロック解除位置に揺動変位するように構成している。   Then, the front surface side locking device 53 and the back surface side locking device 55 of the first locking mechanism 51 are displaced and swung to the locking position as the front surface side locking device 53 swings to the lock position. In addition, the back side lock device 55 is configured to swing and displace to the lock release position as the front side lock device 53 swings to the lock release position.

第２ロック機構５２の表面側ロック具５４は、主苗載部１５Ａにおける第２接続部材４２の表面側に備えた被挟持部位４２Ａと、分割苗載部１５Ｂにおける第２接続部材４６の表面側に備えた被挟持部位としてのスペーサ４６Ａとを挟持して、主苗載部１５Ａの第２接続部材４２と分割苗載部１５Ｂの第２接続部材４６との表面側を接合保持した状態をロック状態とする挟持式に構成している。そして、表面側ロック具５４には操作部５４Ａを備えている。   The surface side locking device 54 of the second locking mechanism 52 includes a sandwiched portion 42A provided on the surface side of the second connection member 42 in the main seedling placement portion 15A, and the surface side of the second connection member 46 in the divided seedling placement portion 15B. A state where the spacer 46A as a sandwiched portion provided in the case is clamped and the surface side of the second connection member 42 of the main seedling mounting portion 15A and the second connection member 46 of the divided seedling mounting portion 15B are joined and held is locked. It is configured to be in a clamping manner. The front side locking device 54 includes an operation portion 54A.

第２ロック機構５２の裏面側ロック具５６は、主苗載部１５Ａにおける第２接続部材４２の裏面側に備えた被挟持部位４２Ｂと、分割苗載部１５Ｂにおける第２接続部材４６の裏面側に備えた被挟持部位としてのスペーサ４６Ｂとを挟持して、主苗載部１５Ａの第２接続部材４２と分割苗載部１５Ｂの第２接続部材４６との裏面側を接合保持した状態をロック状態とする挟持式に構成している。   The back surface side locking device 56 of the second locking mechanism 52 includes a sandwiched portion 42B provided on the back surface side of the second connection member 42 in the main seedling mounting portion 15A, and a back surface side of the second connection member 46 in the divided seedling mounting portion 15B. The spacer 46B as a sandwiched portion provided in the case is clamped, and the state in which the back side of the second connection member 42 of the main seedling placement portion 15A and the second connection member 46 of the divided seedling placement portion 15B is bonded and held is locked. It is configured to be in a clamping manner.

そして、第２ロック機構５２の表面側ロック具５４及び裏面側ロック具５６は、表面側ロック具５４のロック位置への揺動操作に伴って裏面側ロック具５６がロック位置に揺動変位し、又、表面側ロック具５４のロック解除位置への揺動操作に伴って裏面側ロック具５６がロック解除位置に揺動変位するように構成している。   The front-side lock tool 54 and the back-side lock tool 56 of the second lock mechanism 52 are swung to the lock position when the front-side lock tool 54 is swung to the lock position. In addition, the back side locking device 56 is configured to swing and displace to the unlocking position as the front surface side locking device 54 swings to the unlocking position.

主苗載部１５Ａ及び分割苗載部１５Ｂの各被挟持部位４１Ａ，４１Ｂ，４２Ａ，４２Ｂ，４５Ａ，４５Ｂ，４６Ａ，４６Ｂには、各被挟持部位４１Ａ，４１Ｂ，４２Ａ，４２Ｂ，４５Ａ，４５Ｂ，４６Ａ，４６Ｂから分割端の反対側の端部に向けて突出する挟持用の突部４１ｃ、４２ｃ、４５ｃ、４６ｃを備えている。   The sandwiched sites 41A, 41B, 42A, 42B, 45A, and 45B are included in the sandwiched sites 41A, 41B, 42A, 42B, 45A, 45B, 46A, and 46B of the main seedling platform 15A and the divided seedling platform 15B. Clamping protrusions 41c, 42c, 45c, and 46c that protrude from 46A and 46B toward the end opposite to the split ends are provided.

分割苗載部１５Ｂの各接続部材４５，４６には、対応する連結部材５７，５８の移動範囲内に位置して、対応する連結部材５７，５８の乗り越え移動により、連結部材５７，５８を、対応するロック機構５１，５２がロック状態となるロック位置と解除状態となる解除位置とに切り換え保持する位置決め用の突部４５ｄ、４６ｄを備えている。   The connection members 45 and 46 of the divided seedling mounting portion 15B are positioned within the movement range of the corresponding connection members 57 and 58, and the connection members 57 and 58 are moved by the movement of the corresponding connection members 57 and 58. Corresponding lock mechanisms 51 and 52 are provided with positioning projections 45d and 46d for switching and holding between a lock position where the lock mechanism 51 and 52 are locked and a release position where the lock mechanism 51 and 52 are released.

主苗載部１５Ａにおける表面側の左端部には、分割苗載部１５Ｂの上部側を所定の収納位置にて受け止め支持する上側支持フレーム６１と、分割苗載部１５Ｂの下部側を所定の収納位置にて受け止め支持する下側支持フレーム６２とを立設している。   An upper support frame 61 that receives and supports the upper side of the divided seedling placement unit 15B at a predetermined storage position and a lower side of the divided seedling placement unit 15B are stored at the left end on the front side of the main seedling mounting unit 15A. A lower support frame 62 is received and supported at the position.

各支持フレーム６１，６２には、分割苗載部１５Ｂの分割端に接合可能で、各ロック機構５１，５２による分割苗載部１５Ｂの分割端との接合保持が可能な接合部６１Ａ，６２Ａを備えている。   Each support frame 61, 62 has joint portions 61A, 62A that can be joined to the split ends of the split seedling placement portion 15B and can be joined and held with the split ends of the split seedling placement portion 15B by the lock mechanisms 51, 52. I have.

そして、上側支持フレーム６１の接合部６１Ａには、苗載台１５の収納状態において、分割苗載部１５Ｂの第１接続部材４５に備えた位置決めピン４５ａが挿通される位置決め穴６１ａと、分割苗載部１５Ｂにおける第１接続部材４５の表面側に備えたスペーサ４５Ａに接合して、そのスペーサ４５Ａとの第１ロック機構５１の表面側ロック具５３による接合保持が可能になる被挟持部位６１ｂとを備えている。   The joint 61A of the upper support frame 61 includes a positioning hole 61a through which the positioning pin 45a provided in the first connection member 45 of the divided seedling mounting portion 15B is inserted in the storage state of the seedling mounting base 15, and a divided seedling. A sandwiched portion 61b that is joined to the spacer 45A provided on the surface side of the first connecting member 45 in the mounting portion 15B, and can be joined and held by the surface side locking device 53 of the first locking mechanism 51 with the spacer 45A. It has.

又、下側支持フレーム６２の接合部６２Ａには、苗載台１５の収納状態において、分割苗載部１５Ｂの第２接続部材４６に備えた上側の位置決めピン４６ａが挿通される位置決め穴６２ａと、分割苗載部１５Ｂにおける第２接続部材４６の表面側に備えたスペーサ４６Ａに接合して、そのスペーサ４６Ａとの第２ロック機構５２の表面側ロック具５４による接合保持が可能になる被挟持部位６２ｂとを備えている。この被挟持部位６２ｂには、被挟持部位６２ｂから分割端の反対側の端部に向けて突出する挟持用の突部６２ｃを備えている。   The joint 62A of the lower support frame 62 has a positioning hole 62a through which the upper positioning pin 46a provided in the second connecting member 46 of the divided seedling mounting portion 15B is inserted in the state in which the seedling mounting base 15 is stored. The sandwiched seedling portion 15B is joined to the spacer 46A provided on the surface side of the second connection member 46, and can be held and joined to the spacer 46A by the surface-side lock tool 54 of the second lock mechanism 52. And a portion 62b. The sandwiched portion 62b includes a sandwiching projection 62c that projects from the sandwiched portion 62b toward the end opposite to the split end.

図２、図８、図１４〜１６、図１８及び図２１に示すように、分割苗載部１５Ｂの裏面側に備える縦送り機構用の軸支部材７０には支持片７０Ａを屈曲形成している。そして、この支持片７０Ａには、分割苗載部１５Ｂが所定の収納位置に位置する状態において、下側支持フレーム６２に備えた受止部６２Ｂに圧接して分割苗載部１５Ｂの振動を抑制するクッションゴム７１を嵌め込み装着している。つまり、既存の部品を利用した防振構造により、部品点数の削減及び構成の簡素化などを図りながら、分割苗載部１５Ｂを所定の収納位置に振動を抑制した安定状態で位置させることができる。   As shown in FIGS. 2, 8, 14 to 16, 18, and 21, a support piece 70 </ b> A is bent and formed on a shaft support member 70 for a longitudinal feed mechanism provided on the back surface side of the divided seedling mounting portion 15 </ b> B. Yes. The support piece 70A is pressed against a receiving portion 62B provided in the lower support frame 62 to suppress vibration of the divided seed placement portion 15B in a state where the divided seed placement portion 15B is located at a predetermined storage position. A cushion rubber 71 is fitted and installed. In other words, the split seedling mounting portion 15B can be positioned at a predetermined storage position in a stable state in which vibration is suppressed, while reducing the number of parts and simplifying the configuration by using a vibration isolation structure that uses existing parts. .

ちなみに、この苗載台１５の分割構造において、苗載台１５の収納状態は、主苗載台１５Ａに分割苗載台１５Ｂを上側支持フレーム６１と下側支持フレーム６２とを介して載置固定するだけであることから、苗載台１５の収納状態での横送り機構１６による横送りが許容されている。そのため、誤操作などによって苗載台１５の収納状態での横送り機構１６による横送りが行われたとしても、その横送りによる苗載台１５などの破損を回避することができる。   Incidentally, in the divided structure of the seedling stage 15, the storage state of the seedling stage 15 is fixed by placing the divided seedling stage 15B on the main seedling stage 15A via the upper support frame 61 and the lower support frame 62. Therefore, the lateral feed by the lateral feed mechanism 16 in the storage state of the seedling stage 15 is allowed. Therefore, even if the lateral feed mechanism 16 is laterally fed due to an erroneous operation or the like when the seedling stage 15 is stored, damage to the seedling stage 15 due to the lateral feed can be avoided.

図３〜７に示すように、下側ガイド機構２５の摺動レール３０は、苗載台１５の収納状態への切り換えによって狭くなる苗載台１５の左右幅に応じて、摺動レール３０の両端部を機体内側に折り畳み収納可能に構成している。具体的には、摺動レール３０は、収納状態に切り換えた苗載台１５の左右幅と略同じ長さで左右中央に位置する固定部３０Ａと左右両端の可動部３０Ｂとを備えている。そして、固定部３０Ａの左右両端部に左右の可動部３０Ｂを、固定部３０Ａに対する各可動部３０Ｂの左右方向への摺動変位と上下方向への揺動変位とを許容する状態に接続機構７６を介して接続することにより、固定部３０Ａと左右の可動部３０Ｂとを左右に連接した作業状態と、苗載台１５と同様に作業状態よりも左右幅を狭くした収納状態とに切り換え可能に構成している。   As shown in FIGS. 3 to 7, the slide rail 30 of the lower guide mechanism 25 is formed by the slide rail 30 according to the left-right width of the seedling table 15 that is narrowed by switching to the storage state of the seedling table 15. Both ends are configured to be folded and housed inside the fuselage. Specifically, the slide rail 30 includes a fixed portion 30A that is substantially the same length as the left and right width of the seedling table 15 that has been switched to the storage state, and is positioned at the left and right centers, and movable portions 30B at both left and right ends. Then, the connecting mechanism 76 allows the left and right movable portions 30B at the left and right ends of the fixed portion 30A to permit the sliding displacement in the left-right direction and the swinging displacement in the vertical direction with respect to the fixed portion 30A. Can be switched between a working state in which the fixed portion 30A and the left and right movable portions 30B are connected to the left and right, and a storage state in which the left and right widths are narrower than the working state in the same manner as the seedling stage 15. It is composed.

〔別実施形態〕
〔１〕苗載台１５としては、３分割に分割可能に構成したものであってもよい。 [Another embodiment]
[1] The seedling stage 15 may be configured to be divided into three parts.

〔２〕図２２に示すように、連結機構３４の固定部材３５に装備する支軸３７に扁平軸を採用し、かつ、可動部材３６における上下の長孔３６ａを、その扁平軸３７の長径に対応する長径長孔部３６ａａと、扁平軸３７の短径に対応する小径長孔部３６ａｂとを有するように形成して、扁平軸３７と長孔３６ａの長径長孔部３６ａａとから揺動許容手段８０を構成し、かつ、扁平軸３７と長孔３６ａの短径長孔部３６ａｂとから揺動規制手段８１を構成するようにしてもよい。 [2] As shown in FIG. 22, a flat shaft is adopted as the support shaft 37 provided in the fixed member 35 of the coupling mechanism 34, and the upper and lower long holes 36 a in the movable member 36 are formed to have a long diameter of the flat shaft 37. It is formed so as to have a corresponding long diameter long hole portion 36aa and a small diameter long hole portion 36ab corresponding to the short diameter of the flat shaft 37, and is allowed to swing from the flat shaft 37 and the long diameter long hole portion 36aa of the long hole 36a. The swing regulating means 81 may be constituted by the means 80 and the flat shaft 37 and the short diameter long hole portion 36ab of the long hole 36a.

〔３〕図２３及び図２４に示すように、連結機構３４の固定部材３５に装備する支軸３７に上部扁平軸を採用し、かつ、可動部材３６における上側の長孔３６ａを、その上部扁平軸３７の扁平部の長径に対応する長径長孔部３６ａａと、上部扁平軸３７の扁平部の短径に対応する小径長孔部３６ａｂとを有するように形成し、更に、可動部材３６における下側の長孔３６ａを、上部扁平軸３７の真円部に対応するように形成して、上部扁平軸３７の扁平部と上側の長孔３６ａの長径長孔部３６ａａとから揺動許容手段８０を構成し、かつ、上部扁平軸３７の扁平部と上側の長孔３６ａの短径長孔部３６ａｂとから揺動規制手段８１を構成し、更に、上部扁平軸３７の真円部と下側の長孔３６ａにより、長径長孔部３６ａａでの上部扁平軸３７のガタツキを抑制するようにしてもよい。 [3] As shown in FIGS. 23 and 24, the upper flat shaft is adopted as the support shaft 37 provided in the fixing member 35 of the coupling mechanism 34, and the upper elongated hole 36a in the movable member 36 is formed in its upper flat shape. A long diameter long hole portion 36aa corresponding to the long diameter of the flat portion of the shaft 37 and a small diameter long hole portion 36ab corresponding to the short diameter of the flat portion of the upper flat shaft 37 are formed. The side long hole 36a is formed so as to correspond to the perfect circle part of the upper flat shaft 37, and the swing permitting means 80 is formed from the flat part of the upper flat shaft 37 and the long diameter long hole part 36aa of the upper long hole 36a. And the swing restricting means 81 is composed of the flat portion of the upper flat shaft 37 and the short-diameter long hole portion 36ab of the upper long hole 36a. The upper flat shaft 37 in the long diameter long hole portion 36aa is provided by the long hole 36a. Rattling may be suppressed.

〔４〕図２５に示すように、分割苗載部１５Ｂが適正揺動操作位置Ｐ２に到達した際に、連結機構３４の固定部材３５に装備する支軸３７に作用して、支軸３７を可動部材３６における上下の長孔３６ａの右端部ａに保持することにより、分割苗載部１５Ｂの揺動操作中に分割苗載部１５Ｂが不測に摺動変位することを抑制する板バネからなる保持手段８５を可動部材３６に装備するようにしてもよい。 [4] As shown in FIG. 25, when the divided seedling mounting portion 15B reaches the proper swinging operation position P2, it acts on the support shaft 37 provided on the fixing member 35 of the coupling mechanism 34, and the support shaft 37 is moved. By holding at the right end a of the upper and lower elongated holes 36a in the movable member 36, a leaf spring is provided that suppresses the sliding movement of the divided seedling mounting portion 15B during the swinging operation of the divided seedling mounting portion 15B. You may make it equip the movable member 36 with the holding means 85. FIG.

〔５〕図２６及び図２７に示すように、上下の連結機構３４を、平行四連リンクとして機能するように、各連結機構３４の揺動支点位置（支軸３７の位置）及び分割苗載部１５Ｂとの連結支点位置（支軸３８の位置）を、上側の連結機構３４と上側の連結機構３４とで異ならせることにより、分割苗載部１５Ｂを揺動操作する際の安定性を確保するようにしてもよい。 [5] As shown in FIGS. 26 and 27, the upper and lower connecting mechanisms 34 function as a parallel quadruple link so that the swing fulcrum position (the position of the support shaft 37) of each connecting mechanism 34 and the divided seedlings are mounted. The stability at the time of swinging the split seedling mounting portion 15B is ensured by making the connecting fulcrum position (the position of the support shaft 38) with the portion 15B different between the upper connecting mechanism 34 and the upper connecting mechanism 34. You may make it do.

〔６〕連結機構３４としては、固定部材３５に長孔を形成し、可動部材３６に支軸３７を備えたものであってもよい。 [6] As the coupling mechanism 34, a long hole may be formed in the fixed member 35, and the support member 37 may be provided in the movable member 36.

本発明に係る田植機の苗載台支持構造は、乗用田植機や歩行田植機などに適用することができる。   The seedling platform support structure for a rice transplanter according to the present invention can be applied to a riding rice transplanter or a walking rice transplanter.

１５ 苗載台
１５Ａ 主苗載部
１５Ｂ 分割苗載部
１５ａ 苗載面
３０ 支持部材
３４ 連結機構
３５ 固定部材
３５Ａ 支持部
３６ 可動部材
３６Ａ 被支持部
３６Ｂ 切欠部
３７ 支軸
６０ 変位操作手段
８０ 揺動許容手段
８１ 揺動規制手段
８２ 案内手段
８５ 保持手段
Ｐ０ 連接位置
Ｐ１ 適正揺動支点位置
Ｐ２ 適正揺動操作位置
Ｐ３ 揺動許容位置
Ｐａ 境界位置
ａ 当接部 DESCRIPTION OF SYMBOLS 15 Seedling base 15A Main seedling mounting part 15B Division seedling mounting part 15a Seedling mounting surface 30 Support member 34 Connection mechanism 35 Fixed member 35A Support part 36 Movable member 36A Supported part 36B Notch part 37 Support shaft 60 Displacement operation means 80 Oscillation Permissible means 81 Swing restricting means 82 Guide means 85 Holding means P0 Articulating position P1 Proper rocking fulcrum position P2 Proper rocking operation position P3 Swing allowable position Pa Boundary position a Contact part

Claims (6)

苗載台を主苗載部と分割苗載部とに左右に分割可能に構成し、前記主苗載部に対する前記分割苗載部の左右方向への摺動変位と上下方向への揺動変位とを許容する状態に前記主苗載部と前記分割苗載部とを連結する連結機構を備えて、前記苗載台を、前記主苗載部と前記分割苗載部とを左右に連接した作業状態と、前記主苗載部の苗載面の上方に前記分割苗載部を重ねた収納状態とに切り換え可能な分割収納式に構成した田植機の苗載台分割構造において、
前記分割苗載部を所定の収納位置に位置させるための前記分割苗載部の適正揺動支点位置と適正揺動操作位置とを設定し、
前記適正揺動支点位置が前記主苗載部の分割端よりも機体横外側に位置する状態に前記連結機構を構成し、
前記連結機構に、前記分割苗載部が前記適正揺動操作位置に到達する以前からの前記分割苗載部の揺動変位を許容する揺動許容手段を備えた田植機の苗載台分割構造。 The seedling mounting table is configured to be divided into a main seedling mounting part and a divided seedling mounting part in the left and right directions, and the sliding displacement in the left-right direction and the swinging displacement in the vertical direction with respect to the main seedling mounting part. And a connecting mechanism for connecting the main seedling mounting part and the divided seedling mounting part in a state allowing the main seedling mounting part, and the main seedling mounting part and the divided seedling mounting part are connected to the left and right. In the seedling platform splitting structure of the rice transplanter configured in the split storage type that can be switched between the working state and the storage state in which the split seedling mounting part is stacked above the seedling mounting surface of the main seedling mounting part,
Setting an appropriate swinging fulcrum position and an appropriate swinging operation position of the divided seedling mounting part for positioning the divided seedling mounting part in a predetermined storage position;
The coupling mechanism is configured in a state where the proper swing fulcrum position is located on the laterally outer side of the machine body from the split end of the main seedling placement part,
The seedling platform splitting structure of the rice transplanter provided with swinging permission means for allowing swinging displacement of the split seedling mounting portion before the split seedling mounting portion reaches the proper swing operation position in the coupling mechanism. . 前記連結機構に、前記分割苗載部が前記主苗載部に連接する連接位置から前記連接位置と前記適正揺動操作位置との間に設定した揺動許容位置に到達するまでの間において前記分割苗載部の揺動変位を阻止する揺動規制手段を備えた請求項１に記載の田植機の苗載台分割構造。   In the connecting mechanism, the divided seedling mounting part is in a period from the connection position where the divided seedling mounting part is connected to the main seedling mounting part to the swing allowable position set between the connection position and the proper swing operation position. The seedling platform splitting structure of the rice transplanter according to claim 1, further comprising swing restricting means for preventing swinging displacement of the split seedling mounting portion. 前記連結機構に、前記主苗載部に固定した固定部材と、一端部に前記分割苗載部を連結した可動部材とを備え、前記固定部材に対する前記可動部材の左右摺動により前記分割苗載部が左右方向に摺動変位し、かつ、前記固定部材に対する前記可動部材の支軸を支点にした起伏揺動により前記分割苗載部が上下方向に揺動変位するように前記連結機構を構成し、
前記固定部材に、前記可動部材の左右摺動を許容する状態で前記可動部材の倒伏方向下手側から前記可動部材を受け止め支持する支持部を形成し、
前記固定部材における前記適正揺動支点位置の対応箇所に前記支軸を配備し、かつ、前記可動部材に前記支軸との当接により前記可動部材の機体横外方への摺動を制限する当接部を備え、
前記分割苗載部が前記揺動許容位置に位置するときの前記支軸の中心位置に対応する前記可動部材の摺動方向での所定箇所を境界位置に設定して、前記可動部材における前記境界位置から分割苗載部側の部分に前記支持部により受け止め支持される被支持部を形成することにより前記揺動規制手段を構成し、かつ、前記可動部材における前記境界位置から主苗載部側の部分に前記支持部との間に隙間を確保して前記可動部材の起伏揺動を許容する切欠部を形成することにより前記揺動許容手段を構成した請求項２に記載の田植機の苗載台分割構造。 The connection mechanism includes a fixed member fixed to the main seedling mounting portion and a movable member having the one end portion connected to the divided seedling mounting portion, and the divided seedling mounting is performed by sliding the movable member to the left and right with respect to the fixed member. The connecting mechanism is configured such that the split seedling portion swings and displaces in a vertical direction by undulation swinging with the support member of the movable member as a fulcrum with respect to the fixed member. And
Forming a support portion on the fixed member to receive and support the movable member from the lower side in the falling direction of the movable member while allowing the movable member to slide left and right.
The support shaft is arranged at a position corresponding to the proper swinging fulcrum position of the fixed member, and the sliding of the movable member to the lateral side of the body is restricted by contacting the movable member with the support shaft. A contact portion,
A predetermined position in the sliding direction of the movable member corresponding to the center position of the support shaft when the divided seedling mounting portion is located at the swing allowable position is set as a boundary position, and the boundary in the movable member The swing restricting means is configured by forming a supported portion that is received and supported by the support portion in a portion on the divided seedling placement portion side from the position, and the main seedling placement portion side from the boundary position in the movable member The seedling of the rice transplanter according to claim 2, wherein the rocking permission means is formed by forming a notch portion that allows a swinging motion of the movable member by securing a gap between the support member and the support portion. Mounting platform divided structure. 前記連結機構に、前記分割苗載部が前記適正揺動操作位置に到達する以前での前記分割苗載部の前記収納位置に向けた揺動変位に伴って、前記分割苗載部が前記適正揺動操作位置に到達した状態が得られるように前記分割苗載部を摺動案内する案内手段を備えた請求項１〜３のいずれか一つに記載の田植機の苗載台分割構造。   The split seedling mounting portion is moved to the proper position in accordance with the swing displacement of the split seedling mounting portion toward the storage position before the split seedling mounting portion reaches the proper swing operation position. The seedling platform splitting structure of the rice transplanter according to any one of claims 1 to 3, further comprising guide means for slidingly guiding the split seedling mounting portion so as to obtain a state of reaching the swing operation position. 前記連結機構に、前記分割苗載部が前記適正揺動操作位置に到達するのに伴って、前記分割苗載部を前記適正揺動操作位置に保持する保持手段を備えた請求項１〜４のいずれか一つに記載の田植機の苗載台分割構造。   The said connection mechanism was equipped with the holding means which hold | maintains the said divided seedling mounting part in the said appropriate rocking | fluctuation operation position as the said divided seedling mounting part reaches | attains the said appropriate rocking | fluctuation operation position. The rice transplanter seedling stand dividing structure according to any one of the above. 前記連結機構に、前記分割苗載部の機体横外方への摺動変位に伴って、前記苗載台を左右方向に移動可能に支持する支持部材から離れる方向に前記分割苗載部を変位させる変位操作手段を備えた請求項１〜５のいずれか一つに記載の田植機の苗載台分割構造。   The split seedling mounting portion is displaced in a direction away from a support member that supports the seedling mounting base so as to be movable in the left-right direction in accordance with the sliding displacement of the split seedling mounting portion in the laterally outward direction of the machine body. The seedling platform splitting structure for a rice transplanter according to any one of claims 1 to 5, further comprising a displacement operating means.

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