JP3678544B2 - Rice transplanter - Google Patents
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- JP3678544B2 JP3678544B2 JP18047697A JP18047697A JP3678544B2 JP 3678544 B2 JP3678544 B2 JP 3678544B2 JP 18047697 A JP18047697 A JP 18047697A JP 18047697 A JP18047697 A JP 18047697A JP 3678544 B2 JP3678544 B2 JP 3678544B2
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Description
【0001】
【発明の属する技術分野】
本発明は例えば苗載台及び植付爪を備えて連続的に苗植作業を行う田植機に関する。
【0002】
【発明が解決しようとする課題】
従来、トップリンク及びロワーリンクを介して走行車に植付部を昇降自在に装設させる田植機にあって、トップリンク及びロワーリンクの各後支点軸に連結する前ヒッチと、ローリング支点軸を介しローリング自在に植付部を支持する後ヒッチとを例えば軸と軸受部の係合によって連結するようにした手段がある。しかし乍ら、このような係合のみの場合ローリング制御の精度が低下するため、前後ヒッチの一方の軸に他方のフックを手動レバー操作で直接的に係合させてそのロックを行うようにした手段があるが、フックと軸との係合精度が高いと手動による係合操作が困難となり、逆に係合精度が低いとこの係合部にガタが生じて、その分ローリング制御の精度が低下するという不都合がある。
【0003】
【課題を解決するための手段】
したがって、請求項1に係る発明は、走行車にトップリンク及びロワーリンクを介して昇降自在に連結する植付部と、トップリンク及びロワーリンクに上下ヒッチ軸を介して連結する前ヒッチと、前記植付部にローリング支点軸を介して連結する後ヒッチと、前記後ヒッチを前ヒッチに着脱自在に固定する左右フックとを備え、前記下ヒッチ軸を前記前ヒッチの左右外側に突出し、前記左右フックを前記下ヒッチ軸に回動自在に取付け、前記左右フックを後ヒッチの係合軸に係止するように構成し、前記左右フックを単一のフック連結軸を介して一体的に連結してなる田植機において、前記フック連結軸に当接させるための左右カム体を前記前ヒッチに配置し、前記左右カム体を単一のカム連結軸を介して一体的に連結したものであるから、前記前ヒッチと後ヒッチとをガタなく適正に係合連結させて、前記植付部のローリング制御の精度を安定維持できる。また、前記ロワーリンクを前ヒッチに連結する下ヒッチ軸と、前記前ヒッチを後ヒッチに連結する前記係合軸とを有効に利用して、前記左右フックによる前ヒッチ及び後ヒッチのガタのない良好なロックを可能にできる。前記左右フックを極めて簡単な構成手段にて前ヒッチに組込むことができる。左右一体のカム体にて左右フックを容易且つ精度良好に動作させて、前ヒッチと後ヒッチとを確実にロックできるものである。
【0004】
請求項2に係る発明は、前記カム連結軸を挿通するための長孔を前記前ヒッチに形成し、カム操作レバーを前記カム連結軸の一端側に設けたものであるから、左右フックと左右カム体とを前ヒッチにコンパクトに組込むことができ、カム操作レバーの簡単な操作にて確実に前ヒッチと後ヒッチとをロックできるものである。
【0005】
請求項3に係る発明は、前記カム連結軸を押圧して前記左右カム体の位置調節を行うカム調節部材を設けたものであるから、各部品の精度や、フック及び軸の摩耗などの悪影響を受けることなく、フックによる前後ヒッチの最適なロックを可能にして、ローリング制御の安定維持を図るものである。
【0006】
【発明の実施の形態】
以下、本発明の実施例を図面に基づいて詳述する。図1はヒッチ部の側面説明図、図2は乗用田植機の側面図、図3は同平面図を示し、図中(1)は作業者が搭乗する走行車であり、ディーゼルエンジン(2)を車体フレーム(3)前部上方に搭載させ、ミッションケース(4)前方にフロントアクスルケース(5)を介して水田走行用前輪(6)を支持させると共に、前記ギヤ変速ケース(4)の後部にリヤアクスルケース(7)を連設し、前記リヤアクスルケース(7)に水田走行用後輪(8)を支持させる。そして前記エンジン(2)等を覆うボンネット(9)両側に予備苗載台(10)を取付けると共に、乗降ステップ(11)を介して作業者が搭乗する車体カバー(12)によって前記ミッションケース(4)等を覆い、前記車体カバー(12)上部に運転席(13)を取付け、その運転席(13)の前方で前記ボンネット(9)後部に操向ハンドル(14)を設ける。
【0007】
また、図中(15)は10条植え用の苗載台(16)並びに植付爪(17)などを具備する植付部であり、前高後低の合成樹脂製の前傾式苗載台(16)を下部レール(18)及びガイドレール(19)を介して植付ケース(20)に左右往復摺動自在に支持させると共に、一方向に等速回転させるロータリケース(21)を前記植付ケース(20)に支持させ、該ケース(21)の回転軸芯を中心に対称位置に一対の爪ケース(22)(22)を配設し、その爪ケース(22)(22)先端に植付爪(17)(17)を取付ける。また前記植付ケース(20)の前側に後ヒッチ(23)を設け、該後ヒッチ(23)を前ヒッチ(24)に連結させ、トップリンク(25)及びロワーリンク(26)を含むリンク機構(27)後部に前ヒッチ(24)を取付け、走行車(1)後側にリンク機構(27)を介して植付部(15)を連結させ、前記リンク機構(27)を介して植付部(15)を昇降させる昇降シリンダ(28)をロワーリンク(26)に連結させ、前記前後輪(6)(8)を走行駆動して移動すると同時に、左右に往復摺動させる苗載台(16)から一株分の苗を植付爪(17)によって取出し、連続的に苗植え作業を行うように構成する。
【0008】
また、図中(29)は走行変速レバー、(30)は植付昇降兼作業走行変速用副変速レバー、(31)は植付け感度調節レバー、(32)は主クラッチペダル、(33)(33)は左右ブレーキペダル、(34)は2条分均平用センターフロート、(35)は2条分均平用サイドフロート、(36)は10条用の側条施肥機である。
【0009】
さらに、前記運転席(13)両側の車体カバー(12)両側に左右補助デッキ(37)(37)を固定させ、該デッキ(37)(37)前部に前記乗降ステップ(11)(11)を固定させ、前記補助デッキ(37)(37)後部の機外側に左右サイドデッキ(38)(38)を起伏自在かつ脱着自在に連結させると共に、6条用の中央施肥部(36a)と、各2条用の左右施肥部(36b)(36b)とに、前記施肥機(36)を分割形成し、右施肥部(36b)機外側に送肥ブロワ(39)を配設させ、運転席(13)両側にレバー(29)(30)(31)取付け位置を隔てて左右施肥部(36b)(36b)を収納する一方、6条分の中央苗台(16a)と各2条分の左右苗台(16b)(16b)とに苗載台(16)を分割形成し、苗台支点軸(40)(40)回りに左右苗台(16b)(16b)を上昇させて中央苗台(16a)上側に折畳み収納させ、また2条分の植付爪(17)…及びフロート(35)を備える左右植付ケース(20)(20)を中央苗台(16a)後側に略45度傾斜のケース支点軸(41)回りに回動させて折畳み収納させ、植付部(15)及び施肥機(36)の折畳み時には略6条巾とするように構成している。
【0010】
図4に示す如く、前低後高(傾斜角約4度)に傾斜させる前記車体フレーム(3)前部上面にゴム受台(42)…を一体固定させ、受台(42)…の前後方向が略水平な上面側に防振ゴム(43)…を介してエンジン台(44)を取付け、エンジン台(44)に前記エンジン(2)を上載させている。
【0011】
また、前記車体フレーム(3)のエンジン後側位置にステアリングケース(45)を取付け、ハンドルコラム(46)に内挿させる操向ハンドル(14)のステアリング軸(14a)を、左右車体フレーム(3)(3)間の略中央でステアリングケース(45)上面に立設させると共に、ステアリングケース(45)下面に出力軸(47)を突設させ、左右の前輪(6)(6)を方向転換させる操向アーム(48)を前記出力軸(47)に取付けている。
【0012】
さらに、前記エンジン(2)後方の車体フレーム(3)上にラジエータ(49)を立設固定させ、エンジン(2)とラジエータ(49)間にラジエータファン(50)を配置させ、該ファン(50)の駆動軸などに伝達ベルト(51)を介し連動連結するエンジン出力軸(52)をユニバーサルジョイント付伝動軸(53)を介し直接的に後方のミッションケース(4)に連動連結させるもので、前記車体フレーム(3)後端部にリヤアクスルケース(7)をボルト止め固定させ、前記リヤアクスルケース(7)前面にミッションケース(4)後面を連結固定させると共に、ミッションケース(4)の右側前面にクラッチケース(54)を一体形成し、クラッチケース(54)前面に変速ケース(55)後面を嵌合固定させ、また昇降シリンダ(28)を作動させる油圧ポンプ(56)を変速ケース(55)の左側後面に固定させ、四角パイプ形の左右車体フレーム(3)(3)の間でこの上面よりも低位置に前記各ケース(4)(54)(55)及び油圧ポンプ(56)を吊下げ固定させ、前記伝動軸(53)を前記出力軸(52)後端と変速ケース(55)間に設け、エンジン(2)出力を変速ケース(55)に伝えると共に、フロントアクスルケース(5)とミッションケース(4)間に前輪伝動軸(57)を設け、ミッションケース(4)の変速出力を各アクスルケース(5)(7)を介して前後輪(6)(8)に伝えるように構成している。
【0013】
また、左右車体フレーム(3)(3)後端部上面に左右支柱(58)(58)を立設させ、左右支柱(58)(58)上端を水平フレーム(59)によって連結させ、支柱(58)と水平フレーム(59)を一体固定させて正面視門形に形成し、車体フレーム(3)中間のブレーキペダル受軸(60)と、前記水平フレーム(59)中間の間に、前低後高に傾斜させるサブフレーム(61)(61)を架設させると共に、サブフレーム(61)(61)間に昇降シリンダ(28)を取付け、またトップリンク(25)及びロワーリンク(26)で形成するリンク機構(27)を各フレーム(3)(59)に支軸(62)(63)を介して取付け、昇降シリンダ(28)によってリンク機構(27)を揺動させて植付部(15)を昇降させるように構成している。
【0014】
図5乃至図7に示す如く、前記後ヒッチ(24)の上端に受枠(64)を一体固定させ、該受枠(64)に支軸(65)を介して油圧ローリングシリンダ(66)中間を回転自在に取付けると共に、左右の植付ケース(20)(20)に固設する左右苗台支柱に前記シリンダ(66)のピストン(66a)両端を連結させて、後ヒッチ(23)の下端にケース台(67)を介し固設する軸ケース(68)のローリング支点軸(69)を中心に、ローリングシリンダ(66)制御によって植付部(15)を左右に傾動させるように構成している。
【0015】
また、前記ロワーリンク(26)前端部の本機支持部に基板(70)を立設させ、基板(70)上端とロワーリンク(26)間にリンクフレーム(71)を側面視三角形に連結させ、前記三角形頂角の基板(70)とリンクフレーム(71)連結部にピン(72)を介して昇降シリンダ(28)のピストンロッド(28a)を連結させると共に、ロワーリンク(26)後端部の二叉部(26a)の間に前ヒッチ(24)を挾んで下ヒッチ軸(73)を連結させる。また、前記トップリンク(25)を構成する前後ロッド(74)(75)を伸縮させる電動ピッチングモータ(76)を設け、該モータ(76)によってトップリンク(25)長さを変更し、前ロッド(74)前端の支軸(62)と後ロッド(75)後端の上ヒッチ軸(77)の間隔を変化させ、下ヒッチ軸(73)回りに前ヒッチ(24)を前後方向に回転させ、前ヒッチ(24)に係脱自在な上下係合軸(78)(79)及び後ヒッチ(23)を介して連結させる植付部(15)を前後に傾斜させ、植付部(15)の前後傾斜角調節によってフロート(34)(35)の接地姿勢を修正するように構成している。
【0016】
さらに、前ヒッチ(24)にパイプ形ステー(80)を貫通させ、前記ヒッチ(24)外側に補強金具(81)を介してステー(80)を固定させ、前記ヒッチ(23)両外側にステー(80)両端を突設させると共に、前記ロワーリンク(26)後端側の二叉部(26a)上面に鈑金製下降ストッパ(82)を一体固定させ、前ヒッチ(24)の両側で左右二組のステー(80)及び下降ストッパ(82)を当接させ、ロワーリンク(26)の下降動作を禁止し、植付部(15)を最下げ高さ位置に支持するもので、苗載台(16)の苗載量の増減などによって植付部(15)の最下げ高さが変化する不具合をなくしていると共に、ピッチングモータ(76)を操作して植付部(15)を前傾させたとき、また植付部(15)が走行車(1)に対して左右に傾斜したとき、両方または左右いずれか一方のステー(80)の前方移動により、植付部(15)の最下げ高さが高くなるように構成している。
【0017】
ところで図8乃至図10にも示す如く、前ヒッチ(24)の上端に横パイプフレーム(83)を介してヒッチ板(84)を固設させ、前記ヒッチ軸(77)を介し後ロッド(74)にヒッチ板(84)を連結させると共に、ヒッチ板(84)上端と前ヒッチ(24)下端後部とに凹形状で上向き及び後向きの上下フック溝(85)(86)を形成し、左右前ヒッチ(24)間の後ヒッチ(23)の上下端に固設する上下係合軸(78)(79)を前記フック溝(85)(86)に上方向及び後方向からそれぞれ嵌合させて、前ヒッチ(24)に後ヒッチ(23)を着脱自在に連結させるように構成している。
【0018】
また、前記下ヒッチ軸(73)の左右前ヒッチ(24)とロワーリンク(26)の二叉部(26a)間に、左右1組のロック手段であるロック用フック(87)の基端を回動自在に取付け、該フック(87)先端側の上向き凹形フック溝(88)を、前記下フック溝(86)に嵌合する下係合軸(79)に下方向より係合させるもので、左右のフック(87)の中間部間を単一の連結軸(89)で相互に連結させ、左右のフック(87)を一体的に下係合軸(79)に係合連結させるように構成している。
【0019】
さらに、前記連結軸(89)に下方向から当接させるカム体(90)を左右の前ヒッチ(24)の内側近傍位置に配設するもので、左右の前ヒッチ(24)の下端側に上下方向の長孔(91)を形成し、該長孔(91)内を左右方向に挿通するカム軸(92)の左右両端側に左右カム体(90)を固設させると共に、右側の前ヒッチ(24)より右外側に突出させるカム軸(92)端にカム操作レバー(93)の基端を固設させ、カム軸(92)と同様に長孔(91)内をカム軸(92)上方で左右方向に挿通させる前記連結軸(89)に対し、図10に示す如く操作レバー(93)を前方に傾けるときカム体(90)の凸部(90a)を当接させて、連結軸(89)を押し上げて下係合軸(79)とフック(87)の係合保持を図る一方、図9に示す如く操作レバー(93)を後方に傾けるときカム体(90)による連結軸(89)の押し上げを解除させ、フック(87)を下方向に回動させて、下フック溝(86)の後方開口部を開放するように構成している。
【0020】
またさらに、前記カム軸(92)を下方向より押圧する調節部材である調節ボルト(94)を前ヒッチ(24)の底板(24a)に取付け、下係合軸(79)に対し抑え角を有するフック溝(88)の係合時の下係合軸(79)のガタや、各部品の精度や摩耗による下係合軸(79)のガタなどを調節ボルト(94)で解消するように構成している。
また、前記操作レバー(93)の中間を屈曲させてストッパ部(93a)に形成して、該レバー(93)の後方に傾けて前記ステー(80)に当接させるときそれ以上の後方への傾きを規制する一方、前記レバー(93)を前方に傾けて下ヒッチ軸(73)に当接させるとき、それ以上の前方への傾きを規制するように構成している。
さらに、前記フック(87)の係合状態時となる前記カム体(90)の凸部(90a)と連結軸(89)の当接時にあっては、連結軸(89)とカム軸(92)とを結ぶ軸ライン(L)よりカム体(90)を支点越えするように設けて、フック(87)に係合解除方向の回動反力が作用する場合でも、カム体(90)によってフック(87)の確実な係合保持を図るように構成したものである。
【0021】
【発明の効果】
以上実施例から明らかなように、請求項1に係る発明は、走行車(1)にトップリンク(25)及びロワーリンク(26)を介して昇降自在に連結する植付部(15)と、トップリンク(25)及びロワーリンク(26)に上下ヒッチ軸(73)(77)を介して連結する前ヒッチ(24)と、前記植付部(15)にローリング支点軸(69)を介して連結する後ヒッチ(23)と、前記後ヒッチ(23)を前ヒッチ(24)に着脱自在に固定する左右フック(87)とを備え、前記下ヒッチ軸(73)を前記前ヒッチ(24)の左右外側に突出し、前記左右フック(87)を前記下ヒッチ軸(73)に回動自在に取付け、前記左右フック(87)を後ヒッチ(23)の係合軸(79)に係止するように構成し、前記左右フック(87)を単一のフック連結軸(89)を介して一体的に連結してなる田植機において、前記フック連結軸(89)に当接させるための左右カム体(90)を前記前ヒッチ(24)に配置し、前記左右カム体(90)を単一のカム連結軸(92)を介して一体的に連結したものであるから、前記前ヒッチ(24)と後ヒッチ(23)とをガタなく適正に係合連結させて、前記植付部(15)のローリング制御の精度を安定維持できる。また、前記ロワーリンク(26)を前ヒッチ(24)に連結する下ヒッチ軸(73)と、前記前ヒッチ(24)を後ヒッチ(23)に連結する前記係合軸(79)とを有効に利用して、前記左右フック(87)による前ヒッチ(24)及び後ヒッチ(23)のガタのない良好なロックを可能にできる。前記左右フック(87)を極めて簡単な構成手段にて前ヒッチ(24)に組込むことができる。左右一体のカム体(90)にて左右フック(87)を容易且つ精度良好に動作させて、前ヒッチ(24)と後ヒッチ(23)とを確実にロックできるものである。
【0022】
請求項2に係る発明は、前記カム連結軸(92)を挿通するための長孔(91)を前記前ヒッチ(24)に形成し、カム操作レバー(93)を前記カム連結軸(92)の一端側に設けたものであるから、左右フック(87)と左右カム体(90)とを前ヒッチ(24)にコンパクトに組込むことができ、カム操作レバー(93)の簡単な操作にて確実に前ヒッチ(24)と後ヒッチ(23)とをロックできるものである。
【0023】
請求項3に係る発明は、前記カム連結軸(92)を押圧して前記左右カム体(90)の位置調節を行うカム調節部材(94)を設けたものであるから、各部品の精度や、フック(87)及び軸(89)(92)の摩耗などの悪影響を受けることなく、フック(87)による前後ヒッチ(24)(23)の最適なロックを可能にして、ローリング制御の安定維持を図るものである。
【図面の簡単な説明】
【図1】ヒッチ部の側面説明図である。
【図2】乗用田植機の全体側面図である。
【図3】乗用田植機の全体平面図である。
【図4】走行車の側面説明図である。
【図5】タンク機構部の側面説明図である。
【図6】フックの解除状態を示す説明図である。
【図7】ヒッチ部の背面説明図である。
【図8】前ヒッチ部の側面説明図である。
【図9】フック部の側面説明図である。
【図10】フックとカム体の関係説明図である。
【符号の説明】
(1)走行車
(15)植付部
(23)後ヒッチ
(24)前ヒッチ
(25)トップリンク
(26)ロワーリンク
(73)(77)ヒッチ軸
(79)係合軸
(87)フック
(89)フック連結軸
(90)カム体
(91)長孔
(92)カム連結軸
(93)カム操作レバー
(94)調節ボルト(カム調節部材)[0001]
BACKGROUND OF THE INVENTION
The present invention relates to, for example, a rice transplanter that includes a seedling stage and a planting claw and performs seedling planting work continuously.
[0002]
[Problems to be solved by the invention]
Conventionally, in a rice transplanter in which a traveling vehicle is installed so as to be able to move up and down through a top link and a lower link, a front hitch that is connected to each rear fulcrum shaft of the top link and the lower link, and a rolling fulcrum shaft For example, there is means for connecting the rear hitch that supports the planting portion so as to be freely rollable by engagement of the shaft and the bearing portion. However, since the accuracy of rolling control is lowered only with such engagement, the other hook is directly engaged with one shaft of the front and rear hitch by manual lever operation to perform the locking. However, if the engagement accuracy between the hook and the shaft is high, manual engagement operation becomes difficult. Conversely, if the engagement accuracy is low, the engagement portion will be loose, and the rolling control accuracy will be increased accordingly. There is an inconvenience of lowering.
[0003]
[Means for Solving the Problems]
Accordingly, the invention according to
[0004]
The invention according to
[0005]
Invention, the because presses the cam connecting shaft is provided with a cam adjustment member for adjusting the position of the right and left cam member, accuracy of the respective components, adverse effects such as wear of the hooks and shaft according to claim 3 without being subjected to, and to enable optimal locking of the front and rear hitch by the hook, it is intended to achieve control of the stable maintenance rolling system.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of a hitch part, FIG. 2 is a side view of a riding rice transplanter, FIG. 3 is a plan view thereof, and (1) is a traveling vehicle on which an operator is boarded, and a diesel engine (2) Is mounted above the front part of the vehicle body frame (3), the front wheel (6) for paddy field traveling is supported via the front axle case (5) in front of the transmission case (4), and the rear part of the gear transmission case (4) The rear axle case (7) is connected to the rear axle case, and the rear axle case (7) supports the paddy field traveling rear wheel (8). The spare seedling platforms (10) are attached to both sides of the bonnet (9) covering the engine (2) and the like, and the transmission case (4) is mounted by the vehicle body cover (12) on which the operator gets on via the getting-on / off step (11). ) And the like, and a driver's seat (13) is attached to the upper part of the vehicle body cover (12), and a steering handle (14) is provided at the rear of the bonnet (9) in front of the driver's seat (13).
[0007]
Further, in the figure, reference numeral (15) denotes a planting part having a seedling stage (16) for planting ten rows, a planting claw (17), and the like, and a anteversion type seedling stage made of a synthetic resin with front and rear and low. The rotary case (21) for rotating the base (16) to the planting case (20) through the lower rail (18) and the guide rail (19) so as to be slidable to the left and right and rotating at a constant speed in one direction is provided. A pair of claw cases (22) and (22) are arranged at symmetrical positions around the rotation axis of the case (21), and supported by the planting case (20), and the tips of the claw cases (22) and (22) Attach planting claws (17) and (17) to Further, a rear hitch (23) is provided on the front side of the planting case (20), the rear hitch (23) is connected to the front hitch (24), and includes a top link (25) and a lower link (26). (27) A front hitch (24) is attached to the rear part, a planting part (15) is connected to the rear side of the traveling vehicle (1) via a link mechanism (27), and planted via the link mechanism (27). A lifting cylinder (28) for raising and lowering the part (15) is connected to the lower link (26), and the front and rear wheels (6) and (8) are driven to move, and at the same time, a seedling stage that is reciprocated to the left and right ( The seedlings for one stock from 16) are taken out by the planting claws (17), and the seedlings are continuously planted.
[0008]
In the figure, (29) is a traveling speed change lever, (30) is a sub-shifting lever for planting lifting and working traveling speed change, (31) is a planting sensitivity adjusting lever, (32) is a main clutch pedal, and (33) (33 ) Is a left and right brake pedal, (34) is a center float for leveling two strips, (35) is a side float for leveling two strips, and (36) is a side fertilizer for 10 strips.
[0009]
Further, left and right auxiliary decks (37) and (37) are fixed to both sides of the vehicle body cover (12) on both sides of the driver seat (13), and the boarding / exiting steps (11) and (11) are arranged in front of the decks (37) and (37). The left and right side decks (38), (38) are connected to the outside of the rear side of the auxiliary decks (37), (37) in a undulating and detachable manner, and a central fertilizing section (36a) for six strips, The fertilizer applicator (36) is divided into left and right fertilizers (36b) and (36b) for each of the two strips, and a fertilizer blower (39) is disposed on the outer side of the right fertilizer (36b) to provide a driver seat. (13) While storing the left and right fertilizers (36b) (36b) with the levers (29), (30), (31) being attached on both sides, the central nursery (16a) for 6 strips and each for 2 strips The seedling stand (16) is divided and formed on the left and right seedling stands (16b) (16b). The left and right seedling stands (16b) (16b) are raised around the seedling fulcrum shafts (40) and (40), folded and stored on the upper side of the central seedling stand (16a), and the two planting claws (17). The left and right planting cases (20) and (20) provided with the float (35) are rotated around the case fulcrum shaft (41) inclined substantially 45 degrees toward the rear side of the central seedling stand (16a) to be folded and stored. (15) and the fertilizer applicator (36) are configured to have a width of approximately 6 when folded.
[0010]
As shown in FIG. 4, a rubber cradle (42) is integrally fixed to the front upper surface of the vehicle body frame (3) to be tilted to a front low rear height (an inclination angle of about 4 degrees), and before and after the cradle (42). An engine base (44) is attached to the upper surface side of which the direction is substantially horizontal via vibration-proof rubber (43), and the engine (2) is mounted on the engine base (44).
[0011]
A steering case (45) is attached to the rear side of the engine of the body frame (3), and the steering shaft (14a) of the steering handle (14) inserted into the handle column (46) is connected to the left and right body frames (3). ) (3) Standing on the upper surface of the steering case (45) at the approximate center, and projecting the output shaft (47) on the lower surface of the steering case (45) to change the direction of the left and right front wheels (6) (6) A steering arm (48) is attached to the output shaft (47).
[0012]
Further, a radiator (49) is erected and fixed on the vehicle body frame (3) behind the engine (2), and a radiator fan (50) is disposed between the engine (2) and the radiator (49). The engine output shaft (52) linked to the drive shaft (51) via the transmission belt (51) is directly linked to the rear transmission case (4) via the transmission shaft (53) with a universal joint. The rear axle case (7) is bolted and fixed to the rear end of the vehicle body frame (3), and the rear surface of the transmission case (4) is connected and fixed to the front surface of the rear axle case (7). The clutch case (54) is integrally formed, and the rear surface of the transmission case (55) is fitted and fixed to the front surface of the clutch case (54). The hydraulic pump (56) for actuating (28) is fixed to the left rear surface of the transmission case (55), and each case is positioned below the upper surface between the right and left body frames (3) and (3) of the square pipe shape. (4) (54) (55) and the hydraulic pump (56) are suspended and fixed, and the transmission shaft (53) is provided between the rear end of the output shaft (52) and the transmission case (55), and the engine (2) In addition to transmitting the output to the transmission case (55), a front wheel transmission shaft (57) is provided between the front axle case (5) and the transmission case (4), and the transmission output of the transmission case (4) is transmitted to each axle case (5) ( 7) is transmitted to the front and rear wheels (6) and (8).
[0013]
In addition, left and right columns (58) and (58) are erected on the upper surfaces of the rear end portions of the left and right body frames (3) and (3), and the upper ends of the left and right columns (58) and (58) are connected by a horizontal frame (59). 58) and the horizontal frame (59) are integrally fixed to form a frontal view, and between the brake pedal bearing shaft (60) in the middle of the vehicle body frame (3) and the middle of the horizontal frame (59), the front low The subframes (61) and (61) that are inclined to the rear height are installed, and the elevating cylinder (28) is attached between the subframes (61) and (61), and is formed by the top link (25) and the lower link (26). The link mechanism (27) is attached to the frames (3) and (59) via the support shafts (62) and (63), and the link mechanism (27) is swung by the elevating cylinder (28) to plant the planting portion (15 ) It is configured to.
[0014]
As shown in FIGS. 5 to 7, a receiving frame (64) is integrally fixed to the upper end of the rear hitch (24), and the middle of the hydraulic rolling cylinder (66) is rotated to the receiving frame (64) via a support shaft (65). Both ends of the piston (66a) of the cylinder (66) are connected to left and right seedling support posts fixed to the left and right planting cases (20) and (20), and the case is attached to the lower end of the rear hitch (23). The planting portion (15) is tilted to the left and right by the rolling cylinder (66) control around the rolling fulcrum shaft (69) of the shaft case (68) fixed via the table (67).
[0015]
Further, a substrate (70) is erected on the machine support portion at the front end of the lower link (26), and the link frame (71) is connected to the triangle in a side view between the upper end of the substrate (70) and the lower link (26). The piston rod (28a) of the elevating cylinder (28) is connected to the triangular apex base plate (70) and the link frame (71) connecting portion via a pin (72), and the lower end of the lower link (26) The lower hitch shaft (73) is connected by sandwiching the front hitch (24) between the two forks (26a). Further, an electric pitching motor (76) for extending and retracting the front and rear rods (74) and (75) constituting the top link (25) is provided, and the length of the top link (25) is changed by the motor (76), so that the front rod (74) The distance between the support shaft (62) at the front end and the upper hitch shaft (77) at the rear end of the rear rod (75) is changed, and the front hitch (24) is rotated in the front-rear direction around the lower hitch shaft (73). The planting part (15) to be connected to the front hitch (24) via the vertical engagement shafts (78) and (79) and the rear hitch (23) which are detachable can be tilted back and forth, and the planting part (15). The ground contact posture of the floats (34) and (35) is corrected by adjusting the front and rear inclination angles.
[0016]
Further, a pipe-shaped stay (80) is passed through the front hitch (24), the stay (80) is fixed to the outside of the hitch (24) via a reinforcing metal fitting (81), and the stays on both outsides of the hitch (23) are fixed. (80) Both ends project, and a lowering stopper (82) made of a metal plate is integrally fixed to the upper surface of the bifurcated portion (26a) on the rear end side of the lower link (26), and left and right on both sides of the front hitch (24). The pair of stays (80) and the lowering stopper (82) are brought into contact with each other, the lowering link (26) is prohibited from lowering, and the planting part (15) is supported at the lowest position. In addition to eliminating the problem that the minimum height of the planting part (15) changes due to the increase or decrease of the seedling loading amount of (16), the planting part (15) is tilted forward by operating the pitching motor (76). When planted, the planting part (15) When tilted to the left and right with respect to, the forward movement of both or one of the left and right stay (80), is configured so as outermost lowered height of the planting unit (15) is increased.
[0017]
8 to 10, the hitch plate (84) is fixed to the upper end of the front hitch (24) via the horizontal pipe frame (83), and the rear rod (74) is connected via the hitch shaft (77). ) And a hitch plate (84) at the upper end and a front hitch (24) at the lower end and a rear lower portion are formed with concave and upward upper and lower hook grooves (85) and (86). The vertical engagement shafts (78) and (79) fixed to the upper and lower ends of the rear hitch (23) between the hitches (24) are fitted into the hook grooves (85) and (86) from above and from the rear, respectively. The rear hitch (23) is detachably connected to the front hitch (24).
[0018]
Further, a base end of a locking hook (87) as a pair of right and left locking means is provided between the left and right front hitch (24) of the lower hitch shaft (73) and the bifurcated portion (26a) of the lower link (26). A hook that is pivotably mounted, and an upward concave hook groove (88) on the tip end side of the hook (87) is engaged with a lower engagement shaft (79) fitted in the lower hook groove (86) from below. Thus, the intermediate portions of the left and right hooks (87) are connected to each other by a single connecting shaft (89), and the left and right hooks (87) are integrally engaged and connected to the lower engaging shaft (79). It is configured.
[0019]
Further, a cam body (90) that is brought into contact with the connecting shaft (89) from below is disposed near the inside of the left and right front hitches (24). The left and right cam bodies (90) are fixed to the left and right ends of the cam shaft (92) that is formed in the vertical hole (91) and is inserted in the left and right direction through the long hole (91). The base end of the cam operating lever (93) is fixed to the end of the cam shaft (92) that protrudes to the right outside of the hitch (24). 10) When the operating lever (93) is tilted forward as shown in FIG. 10, the convex portion (90a) of the cam body (90) is brought into contact with the connecting shaft (89) inserted in the left-right direction at the upper side. while achieving lower engagement shaft (79) of the engagement holding the hook (87) pushes up the shaft (89), 9, when the operating lever (93) is tilted backward, the cam body (90) releases the push-up of the connecting shaft (89), and the hook (87) is rotated downward to lower the lower hook groove (86). The rear opening is configured to be opened.
[0020]
Furthermore, an adjustment bolt (94), which is an adjustment member for pressing the cam shaft (92) from below, is attached to the bottom plate (24a) of the front hitch (24), and the restraining angle with respect to the lower engagement shaft (79) is increased. The adjustment bolt (94) eliminates the play of the lower engagement shaft (79) when the hook groove (88) is engaged and the play of the lower engagement shaft (79) due to the accuracy and wear of each component. It is composed.
Further, when the middle of the operation lever (93) is bent to form a stopper portion (93a) and tilted rearward of the lever (93) to be brought into contact with the stay (80), it is further rearwardly moved. On the other hand, when the lever (93) is tilted forward and brought into contact with the lower hitch shaft (73), the forward tilt is further restricted.
Further, when the projection (90a) of the cam body (90) and the connecting shaft (89) are brought into contact with the hook (87), the connecting shaft (89) and the cam shaft (92) are brought into contact. The cam body (90) is provided so as to extend beyond the fulcrum from the axis line (L) connecting to the hook line (L), and even when the rotational reaction force in the disengagement direction acts on the hook (87), the cam body (90) The hook (87) is configured to be surely engaged and retained.
[0021]
【The invention's effect】
As is apparent from the above embodiments, the invention according to
[0022]
According to a second aspect of the present invention, a long hole (91) for inserting the cam connecting shaft (92) is formed in the front hitch (24), and a cam operating lever (93) is connected to the cam connecting shaft (92). since those provided on one end side, the left and right hooks (87) and the lateral cam (90) in front hitch (24) can be integrated Mukoto compact, simple operation of the cam operating lever (93) in are those that can be locked and a rear hitch (23) securely with the front hitch (24).
[0023]
The invention according to claim 3, since the those provided cam coupling shaft the right and left cam member presses the (92) cam adjustment member for adjusting the position of (90) (94), Ya accuracy of each component , hooks (87) and the shaft (89) without being adversely affected, such as wear of the (92), thereby enabling optimum locking of the hitch before and after by hooks (87) (24) (23), stable rolling control of It is intended to maintain.
[Brief description of the drawings]
FIG. 1 is a side view of a hitch portion.
FIG. 2 is an overall side view of the riding rice transplanter.
FIG. 3 is an overall plan view of the riding rice transplanter.
FIG. 4 is an explanatory side view of a traveling vehicle.
FIG. 5 is an explanatory side view of a tank mechanism.
FIG. 6 is an explanatory diagram illustrating a hook release state.
FIG. 7 is a rear view of the hitch portion.
FIG. 8 is an explanatory side view of the front hitch portion.
FIG. 9 is an explanatory side view of a hook portion.
FIG. 10 is an explanatory diagram of a relationship between a hook and a cam body.
[Explanation of symbols]
(1) vehicle (15) Planting unit (23) after the hitch (24) before the hitch (25) top link (26) lower link (73) (77) hitch shaft (79) engaging shaft (87) Hook ( 89) Hook connection shaft (90) Cam body (91) Long hole (92) Cam connection shaft (93) Cam operation lever (94) Adjustment bolt (Cam adjustment member)
Claims (3)
前記下ヒッチ軸を前記前ヒッチの左右外側に突出し、前記左右フックを前記下ヒッチ軸に回動自在に取付け、前記左右フックを後ヒッチの係合軸に係止するように構成し、
前記左右フックを単一のフック連結軸を介して一体的に連結してなる田植機において、
前記フック連結軸に当接させるための左右カム体を前記前ヒッチに配置し、前記左右カム体を単一のカム連結軸を介して一体的に連結したことを特徴とする田植機。 A planting part that is connected to the traveling vehicle through a top link and a lower link so as to be movable up and down, a front hitch that is coupled to the top link and the lower link through a vertical hitch shaft, and a rolling fulcrum shaft to the planting part A rear hitch to be connected, and left and right hooks that detachably fix the rear hitch to the front hitch ,
The lower hitch shaft projects to the left and right outer sides of the front hitch, the left and right hooks are rotatably attached to the lower hitch shaft, and the left and right hooks are configured to be locked to the engagement shaft of the rear hitch,
In the rice transplanter formed by integrally connecting the left and right hooks via a single hook connecting shaft ,
A rice transplanter characterized in that left and right cam bodies for contacting the hook connecting shaft are arranged in the front hitch, and the left and right cam bodies are integrally connected via a single cam connecting shaft .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18047697A JP3678544B2 (en) | 1997-06-19 | 1997-06-19 | Rice transplanter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP18047697A JP3678544B2 (en) | 1997-06-19 | 1997-06-19 | Rice transplanter |
Publications (2)
Publication Number | Publication Date |
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JPH119007A JPH119007A (en) | 1999-01-19 |
JP3678544B2 true JP3678544B2 (en) | 2005-08-03 |
Family
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JP18047697A Expired - Fee Related JP3678544B2 (en) | 1997-06-19 | 1997-06-19 | Rice transplanter |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP6071353B2 (en) * | 2012-09-07 | 2017-02-01 | 小橋工業株式会社 | Folding farm work machine |
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1997
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