【０００１】
【産業上の利用分野】
本発明は、育苗箱の隅部床土押圧装置に係るものである。
【０００２】
【従来技術】
従来公知の実開昭６０−１９０２４５号公報には、前壁隅部押圧体を有する取付アームの基部をフレームに回動自在に取付けた構成について記載されている。また、従来公知の特開平２−１９０１２０号公報には、育苗箱を横送する移送台の上方位置に設けたフレームと、前記育苗箱の床土上面より上方の待機位置から床土上面まで下降して前記育苗箱の前壁の隅土を押圧する前壁隅部押圧体を設けた取付アームとからなり、該取付アームは前壁隅部押圧体が最大押圧位置よりも上方で待機するように構成した育苗箱の隅部床土押圧装置について記載されている。
【０００３】
【発明が解決しようとする課題】
前記公知例のうち、実開昭６０−１９０２４５号公報に記載された前壁隅部押圧装置は、鎮圧ローラーと一体的に設けた構成のため、鎮圧は不要だが、隅の部分だけ押圧したいときにできないという課題がある。また、単なるアームの下部後端に前壁隅部押圧体を設けているので、フレームの前側に前壁隅部押圧体を配置すると、アームの先端にある前壁隅部押圧体は下降しながら後退して前壁の隅を押圧できない。また、待機高さと押圧位置が同じであるため、前壁隅部押圧体は床土上面に摺接して、土がたまる等の別の問題が発生する。
この点、特開平２−１９０１２０号公報に記載されたものは、前記課題を解決するが、後壁隅部押圧機構の後壁隅部押圧用のアームと連動する構成のため、何らかの原因（先行育苗箱と後続の育苗箱の間に所定以上の隙間が開いたり、育苗箱の前後壁の厚さが所定より厚くまたは薄いとき等）で後壁隅部押圧装置が作動しないと、前壁隅部押圧機構も作動しないという課題がある。また、連動させる構成のため、構成が複雑で、製造組立が面倒であり、コストが高いという課題もある。
【０００４】
【発明の目的】
アーム回動式の前壁隅部押圧装置であって床土上面より上方位置に待機させて摺接の防止、単独作動の実現、前壁隅部押圧装置の構成の簡素化、上下調節の容易化、組立、取付の容易化を目的とする。
【０００５】
【課題を解決するための手段】
本発明は、育苗箱２を横送する移送台１の上方位置に設けたフレーム９と、該フレーム９に取付けられ横送中の前記育苗箱２の前壁５の上面に当接する高さ位置であって、かつ、回転均平ブラシにより均平された前記育苗箱２内の床土上面よりも上方の待機位置から前記床土上面まで下降して前記育苗箱２の前壁５の隅土を押圧する前壁隅部押圧体１６を設けた取付アーム１３とからなり、該取付アーム１３は、その回動中心を前記フレーム９に基部を軸止した支持アーム２０の先端に取付兼回動規制軸１４により取付け、該取付兼回動規制軸１４は前記フレーム９側に形成した取付兼回動規制軸１４の軸径より大径の回動規制孔１５に係合させて前記支持アーム２０の回動を規制するように構成し、もって、前記取付兼回動規制軸１４を前記支持アーム２０の回動により上下させることにより、前記前壁隅部押圧体１６が前記育苗箱２の前壁５を乗り越えて最大押圧位置から最大押圧位置よりも上方であって前記床土上面より上方の待機位置で待機するように構成した育苗箱の隅部床土押圧装置としたものである。
本発明は、前記取付兼回動規制軸１４は前記回動規制孔１５内周の上下何れか一方から何れか他方の間のみ移動するようにして、前記支持アーム２０の回動を規制した育苗箱の隅部床土押圧装置としたものである。
本発明は、前記取付アーム１３と支持アーム２０との間には、前記前壁隅部押圧体１６を常時下降するように付勢する牽引バネ２２と、前記取付アーム１３を前記支持アーム２０に対する所定位置に待機させるストッパ２４とを設けた育苗箱の隅部床土押圧装置としたものである。
本発明は、育苗箱２を横送する移送台１の上方位置に設けたフレーム９と、該フレーム９に取付けられ横送中の前記育苗箱２の前壁５の上面に当接する高さ位置であって、かつ、回転均平ブラシにより均平された前記育苗箱２内の床土上面よりも上方の待機位置から前記床土上面まで下降して前記育苗箱２の前壁５の隅土を押圧する前壁隅部押圧体１６を設けた取付アーム１３とからなり、該取付アーム１３は前記育苗箱２の移送方向前側上方位置を回動中心とし移送方向後側斜め下方位置に前壁隅部押圧体１６を設け、前記取付アーム１３の前記回動中心は支持アーム２０の先端に設けた取付兼回動規制軸１４とし、前記支持アーム２０は前記取付兼回動規制軸１４の上方で斜め後方に配置し、前記取付アーム１３と前記支持アーム２０の間には前記取付アーム１３を前記取付兼回動規制軸１４中心に下方回動させるように付勢する牽引バネ２２を設け、前記取付アーム１３には先端が前記支持アーム２０側に当接して下方回動を規制するストッパ２４を設け、前記取付兼回動規制軸１４は前記フレーム９側に形成した前記取付兼回動規制軸１４の軸径より大径の回動規制孔１５に係合させて前記支持アーム２０の回動を規制するように構成した育苗箱の隅部床土押圧装置としたものである。
本発明は、前記支持アーム２０には前記前壁隅部押圧体１６が前記待機位置に復帰する速度を調節する錘２６を設けた育苗箱の隅部床土押圧装置としたものである。
【０００６】
【実施例】
本発明の一実施例を図面により説明すると、１は移送台、２は育苗箱であり、移送台１は育苗箱２をイ方向に移送する。３は育苗箱２を移送する移送ロールである。前記移送台１には、育苗箱２の移送方向前側の前壁５の隅部の床土を押圧する隅部押圧装置６の前壁隅部押圧機構７を設ける。
前記移送台１には、フレーム９の側板１０の下端を固定し、前記側板１０、１０には取付板１１、１１をリンク機構（図示省略）を介して上下自在に取付ける。12は取付板１１を上下させる高さ調節ダイヤルである。
しかして、前記左右の側板１０の外側に左右一対の取付アーム１３を配置し、取付アーム１３の前後中間の前側よりの部分に左右方向の取付兼回動規制軸１４を軸装し、該取付兼回動規制軸１４は前記取付板１１に形成した回動規制孔１５回動規制孔１５内に挿通して軸装する。取付アーム１３の後部には育苗箱２の前壁５の隅部を押圧する前壁隅部押圧体１６を取付ける。前記前壁隅部押圧体１６は、左右方向の平板状に形成し、前側を略水平の押圧部１７に形成し、押圧部１７に続いて後側に至るに従い高くなるように傾斜させた傾斜案内面１８に形成する。
【０００７】
前記取付兼回動規制軸１４には前記取付アーム１３全体を回動させる左右一対の支持アーム２０の下端を軸着し、支持アーム２０の基部は後側上方に突出させ、全体回動中心軸２１により前記取付板１１に回動自在に取付ける。即ち、前壁隅部押圧体１６を床土上面よりも上方に待機するように、支持アーム２０は取付アーム１３の回動中心である取付兼回動規制軸１４を上下させるために設けたものであり、取付アーム１３と支持アーム２０の関係は、支持アーム２０が全体回動中心軸２１中心に下方回動すると、前壁隅部押圧体１６は床土より離れ、支持アーム２０が全体回動中心軸２１中心に上方回動すると、前壁隅部押圧体１６は下降し更に取付アーム１３を取付兼回動規制軸１４中心に回動させると、前壁隅部押圧体１６は前壁５の隅部の床土を押圧する。そのため、取付アーム１３は移送方向後側斜め下方位置に前壁隅部押圧体１６を、前記育苗箱２の移送方向前側上方位置を回動中心（取付兼回動規制軸１４）と配置し、前記取付兼回動規制軸１４より上方で斜め後方に前記支持アーム２０の基部を取付ける。
【０００８】
また、支持アーム２０は取付兼回動規制軸１４を所定範囲で上下させればよく、支持アーム２０の回動を規制するが、取付兼回動規制軸１４を取付アーム１３の取付と支持アーム２０のストッパとに兼用することおよび取付板１１に回動規制孔１５を設けることで支持アーム２０の回動規制機構を簡素化している。
なお、支持アーム２０と取付兼回動規制軸１４の配置によっては、取付兼回動規制軸１４を上動させたとき、待機位置とし、下動させると押圧位置に上下関係を反対にすることも可能である。
しかして、前記取付アーム１３の前端と前記全体回動中心軸２１の間には、前記前壁隅部押圧体１６を下方回動させるように常時付勢する牽引バネ２２の前端を係止し、牽引バネ２２の後端は前記全体回動中心軸２１に係止する。牽引バネ２２は育苗箱２の前進力を取付アーム１３の回動に利用して、前壁隅部押圧体１６が前壁５の隅部の床土を押圧するように作用させる。
【０００９】
前記取付兼回動規制軸１４よりも前側部分の取付アーム１３には連結体２３を設け、連結体２３の左右中央位置には出入り自在のストッパ２４を設け、ストッパ２４の上端は前記支持アーム２０の下部に設けた連結体２５の下面に当接させる。したがって、牽引バネ２２により取付兼回動規制軸１４中心に下方回動するように付勢された取付アーム１３は、ストッパ２４が連結体２５に当接して下方回動が規制される。
なお、牽引バネ２２は支持アーム２０の上下両方向の回動には影響せず、支持アーム２０は全体回動中心軸２１に吊設されていることになり、取付アーム１３と支持アーム２０は牽引バネ２２とストッパ２４の作用で互いに同一角度状態を保持したまま全体回動中心軸２１に吊設されて、取付兼回動規制軸１４が回動規制孔１５の内周の下縁に当接して待機し、前壁隅部押圧体１６が押圧するときは後述するように、取付アーム１３が取付兼回動規制軸１４中心に回動する。
【００１０】
しかして、前記全体回動中心軸２１には錘（バランサー）２６を設け、錘２６は支持アーム２０の下方回動に抵抗を与えて待機位置に復帰させるのを遅らせ、前壁隅部押圧体１６が床土上面に窪みを作るのを防止する。
しかして、前記フレーム９には後壁４の隅部を押圧する後壁隅部押圧機構３０を設ける。前記後壁隅部押圧機構３０は左右一対の後壁隅用アーム３１の上部を左右方向の取付軸３２に固定し、取付軸３２は前記取付板１１に軸装する。後壁隅用アーム３１の下部には回転部材３３の上部を下部取付軸３４により回転自在に軸着する。回転部材３３の前面下端には側面視Ｌ型形状の育苗箱２の後壁４の隅部を押圧する後壁隅部押圧体３５を取付位置上下変更自在に取付ける。前記回転部材３３の下部には左右方向の下部軸３６を設け、該下部軸３６にはバネ３７の下端を係止し、バネ３７の上端は前記後壁隅用アーム３１に設けたピン３８に係止し、バネ３７は回転部材３３を常時後方に回動するように付勢させる。また、後壁隅用アーム３１の前記ピン３８の下部にはストッパー３９を設け、回転部材３３の後方回動を停止させる。前記下部軸３６は、前記下部取付軸３４に対して所謂死点越えしないように配置する。後壁隅用アーム３１の中間部には左右方向の回動規制軸４０を設け、回動規制軸４０の両端は取付板１１に形成した回動規制孔４１内に位置させる。後壁隅用アーム３１とフレーム９側との間にはバネ４２を設け、後壁隅用アーム３１を常時上方回動するように付勢する。
【００１１】
したがって、後壁隅用アーム３１は、回動規制孔４１の上側内周縁に回動規制軸４０が係合すると待機位置になり、回動規制孔４１の下側内周縁に回動規制軸４０が係合すると最下方位置になる。
しかして、内周面の位置の相違する調節体（図示省略）を数種類用意し、調節体を適宜選択して前記回動規制軸４０の端部に係合するように設ける。即ち、調節体を設けることにより回動規制軸４０が回動規制孔４１の内周に当接する位置を変更し、もって、後壁隅用アーム３１の回動角度を変更して、後壁隅部押圧体３５の押圧深さを変更する。
また、前壁隅部押圧体１６は、前記後壁隅部押圧機構３０の回転部材３３が前壁５および後壁４を乗越えるときの回転と干渉しないところに配置するとともに、前記取付アーム１３の後側の一部を湾曲させた湾曲部４４に形成し、同一フレーム９への後壁隅部押圧機構３０の取付け、作動を可能にしている。
【００１２】
【作用】
次に作用を述べる。
本発明は以上の構成であるから、移送台１に育苗箱２を供給すると、育苗箱２はイ方向に移送され、移送中に上方の床土供給装置により床土が供給される。
この床土の供給は、多い目に供給して余分のものを取り去るという方法のため、回転均平ブラシにより床土の上面を均平し、育苗箱２の後壁４および前壁５の隅部に溜る余分な隅土を、隅部押圧装置６の前壁隅部押圧機構７により押圧する。なお、前記育苗箱２の移送速度は、一時間あたり約２００箱〜１５００箱と任意である。
【００１３】
前壁隅部押圧機構７の取付アーム１３は牽引バネ２２により取付兼回動規制軸１４中心に下方回動するように付勢され、ストッパ２４が連結体２５に当接して下方回動が規制されるが、牽引バネ２２は支持アーム２０の回動には影響せず、支持アーム２０は全体回動中心軸２１に吊設されたことになり、取付アーム１３と支持アーム２０は互いに同一角度状態を保持したまま全体回動中心軸２１に吊設され、それゆえ、支持アーム２０が自重で全体回動中心軸２１中心に回動し、取付兼回動規制軸１４が回動規制孔１５の内周の下縁に当接して待機している。
この状態で、移送台１に育苗箱２を供給して床土を供給し、回転均平ブラシにより床土の上面を均平し、または、床土を供給し、回転均平ブラシにより床土の上面を均平した育苗箱２を移送台１に供給すると、育苗箱２の前壁５が前壁隅部押圧体１６の傾斜案内面１８に当接する。育苗箱２は傾斜案内面１８を前方に押すから、取付アーム１３は全体回動中心軸２１中心に回動し、取付兼回動規制軸１４も全体回動中心軸２１中心に回動し、その結果、支持アーム２０の全体回動中心軸２１中心に回動により取付兼回動規制軸１４が回動規制孔１５の上側内周面に当接する。
【００１４】
取付兼回動規制軸１４が回動規制孔１５の上側内周面に当接すると、支持アーム２０の上方回動は規制されるので、支持アーム２０は停止するが、前壁隅部押圧体１６は育苗箱２により更に前方に押されるので、取付アーム１３が回動規制孔１５の上側内周面に当接した状態の取付兼回動規制軸１４中心に上方回動する。
取付アーム１３が取付兼回動規制軸１４中心に上方回動すると、牽引バネ２２は伸び、この状態で、前壁隅部押圧体１６の押圧部１７の下方を育苗箱２の前壁５が通過し、前壁隅部押圧体１６は前記牽引バネ２２が元に縮む弾力により回動規制孔１５の上側内周面に当接した状態の取付兼回動規制軸１４中心に下方回動し、前壁隅部押圧体１６は待機位置よりも深く育苗箱２の前壁５の隅土を押圧して均平する。
【００１５】
前壁隅部押圧体１６が前壁５の隅土を押圧すると、支持アーム２０は全体回動中心軸２１中心に支持アーム２０および取付アーム１３の自重で下方回動し、回動規制孔１５の下側内周面に取付兼回動規制軸１４が当接して、支持アーム２０および取付アーム１３の下方回動は停止し、前壁隅部押圧体１６は床土上面より所定間隔上方にて待機する。
即ち、取付アーム１３は、取付兼回動規制軸１４が回動規制孔１５の下側内周面に当接しているとき待機位置であり、回動規制孔１５の上側内周面に取付兼回動規制軸１４が当接しているとき押圧位置となり、この回動中心は全体回動中心軸２１であるから、全体回動中心軸２１を基準にすると、待機位置は押圧位置よりも、取付兼回動規制軸１４が回動規制孔１５内を回動した分上方に位置させることができる。したがって、待機状態のときに前壁隅部押圧体１６が床土上面に接触するのを防止できる。この点、公知例は、回動中心の位置が変化しないので、待機高さと押圧高さが同じになり、若干の押圧不足が生じるか、または、床土上面に摺接する。
【００１６】
また、取付アーム１３が上方回動すると、牽引バネ２２が伸び、この状態で、前壁隅部押圧体１６の押圧部１７の下方を育苗箱２の前壁５が通過し、前壁隅部押圧体１６は前記牽引バネ２２が元に縮む弾力により回動規制孔１５の上側内周面に当接した状態の取付兼回動規制軸１４中心に下方回動し、この下方回動の慣性によっても、前壁隅部押圧体１６は押圧するので、待機位置よりも深く押圧して均平する。
また、前壁隅部押圧体１６が前壁５の隅土を押圧すると、支持アーム２０は全体回動中心軸２１中心に下方回動するので、前壁隅部押圧体１６は押圧位置よりも上方の待機位置に復帰するが、前記全体回動中心軸２１には錘２６が設けられているから、支持アーム２０の下方回動する速度を遅くし、前壁隅部押圧体１６が床土上面から離れるのを遅くする。即ち、前壁隅部押圧体１６は育苗箱２に供給された床土上面と同じ高さまで隅土を押すが、育苗箱２によって床土上面の高さにばらつきがあり、少しでも前壁隅部押圧体１６が深く押圧してすぐに上動させると、前壁隅部押圧体１６が押圧した部分と床土上面との境界部分に段差が発生するが、前壁隅部押圧体１６をゆっくり上動させると、前壁隅部押圧体１６により前記段差を均平しながら上動させることができる。この前壁隅部押圧体１６の上動する速さを錘２６により調節するのであり、錘２６は軸方向に移動可能である。
【００１７】
また、同じ育苗箱２であって、床土供給深さが相違するときは、図７の状態で、ストッパ２４を回して、取付兼回動規制軸１４に対して取付アーム１３を回動させて調節する。また、育苗箱２の高さが相違するときは12により取付板１１ごと全体に高さを調節する。
しかして、後壁隅部押圧機構３０の後壁隅用アーム３１は回動規制軸４０および回動規制孔４１により上方回動が規制され、後壁隅部押圧体３５を育苗箱２内の床土上面には接触しないが育苗箱２の後壁４と衝突する高さにて待機する。
この状態で、育苗箱２の前壁５が後壁隅部押圧体３５の後面に当接し、育苗箱２の前壁５の前進移動により後壁隅部押圧体３５を前進させる。後壁隅部押圧体３５と後壁隅用アーム３１との間にバネ３７があるので、後壁隅部押圧体３５の前進により後壁隅用アーム３１を取付軸３２を中心に回動させ、後壁隅用アーム３１の下方回動により回動規制軸４０が回動規制孔４１の下側内周縁に当接すると、後壁隅用アーム３１の下方回動は停止するが、後壁隅部押圧体３５は移動する育苗箱２により更に前進してバネ３７に抗して回転部材３３を下部取付軸３４を中心に上方回動させ、後壁隅部押圧体３５の下端が前壁５の上端まで回動すると、前壁５が後壁隅部押圧体３５の下方を通過する。
【００１８】
すると、後壁隅部押圧体３５は回転部材３３と共にバネ３７の弾力により下部取付軸３４中心に回動して、回転部材３３がストッパー３９に当接して回動が停止し、後壁隅用アーム３１もバネ４２の弾力により上方回動し、回動規制軸４０が回動規制孔４１の上側内周縁に当接して後壁隅用アーム３１の回動が停止し、後壁隅部押圧体３５は元の高さにて待機する。
次に、前壁５を乗り越えて床土上面の設定された高さに待機中の後壁隅部押圧体３５は後壁４の前面（内面）に当接し、これにより前記したように後壁隅用アーム３１を下方回動させ、後壁隅用アーム３１の下方回動により後壁隅部押圧体３５は前壁５の前面に摺接しながら床土に対して下降することになって、後壁隅用アーム３１が回動規制軸４０および回動規制孔４１により停止するまで回動すると、後壁隅部押圧体３５は後壁４の隅土を最大に押圧して平坦にし、次に前壁５を乗越えるのと同一の作用によって後壁４を乗り越える。
【００１９】
なお、実際は、前記育苗箱２の前壁５が後壁隅部押圧機構３０の後壁隅部押圧体３５の下方を通過して更に育苗箱２が前進すると、このときに、前記前壁隅部押圧機構７の前壁隅部押圧体１６が前壁５の隅土を押圧するが、先に、前壁隅部押圧機構７を説明している。また、前記作用の説明は、理解を容易にするため、１箱の育苗箱２の移動で説明しているが、実際の作業では、連続して隙間なく育苗箱２は移送されるので、先行の育苗箱２の後壁４に後続の育苗箱２の前壁５は接触して移動し、それゆえ、後壁隅部押圧機構３０および前壁隅部押圧機構７は後壁４と前壁５とを同時に乗越え、特に前壁隅部押圧機構７の前壁隅部押圧体１６は、後壁４の内面に当接して上動し、後壁４および前壁５を乗越え、前壁５が通過したときに作用する。
【００２０】
【効果】
本発明は、育苗箱２を横送する移送台１の上方位置に設けたフレーム９と、該フレーム９に取付けられ横送中の前記育苗箱２の前壁５の上面に当接する高さ位置であって、かつ、回転均平ブラシにより均平された前記育苗箱２内の床土上面よりも上方の待機位置から前記床土上面まで下降して前記育苗箱２の前壁５の隅土を押圧する前壁隅部押圧体１６を設けた取付アーム１３とからなり、該取付アーム１３は、その回動中心を前記フレーム９に基部を軸止した支持アーム２０の先端に取付兼回動規制軸１４により取付け、該取付兼回動規制軸１４は前記フレーム９側に形成した取付兼回動規制軸１４の軸径より大径の回動規制孔１５に係合させて前記支持アーム２０の回動を規制するように構成し、もって、前記取付兼回動規制軸１４を前記支持アーム２０の回動により上下させることにより、前記前壁隅部押圧体１６が前記育苗箱２の前壁５を乗り越えて最大押圧位置から最大押圧位置よりも上方であって前記床土上面より上方の待機位置で待機するように構成した育苗箱の隅部床土押圧装置としたものであるから、前壁隅部押圧体１６を最大押圧位置よりも上方で待機させるので、床土上面に接触するのを防止できるという効果を奏する。また、取付アーム１３と支持アーム２０により隅部床土押圧装置として単独で構成できるので、後壁隅部押圧機構３０の設計の自由度を広げ、スペースを有効利用し、前後壁の隅を押圧する両者をフレーム９に一体的に取付けることも可能になって、組立・組付けも容易となる。
本発明は、前記取付兼回動規制軸１４は前記回動規制孔１５内周の上下何れか一方から何れか他方の間のみ移動するようにして、前記支持アーム２０の回動を規制した育苗箱の隅部床土押圧装置としたものであるから、前壁隅部押圧体１６が最大押圧位置よりも上方で待機させる構成を簡単にできるという効果を奏する。
本発明は、前記取付アーム１３と支持アーム２０との間には、前記前壁隅部押圧体１６を常時下降するように付勢する牽引バネ２２と、前記取付アーム１３を前記支持アーム２０に対する所定位置に待機させるストッパ２４とを設けた育苗箱の隅部床土押圧装置としたものであるから、取付アーム１３と支持アーム２０により隅部床土押圧装置として単独で構成して、単独で作用させることができる効果を奏する。
本発明は、育苗箱２を横送する移送台１の上方位置に設けたフレーム９と、該フレーム９に取付けられ横送中の前記育苗箱２の前壁５の上面に当接する高さ位置であって、かつ、回転均平ブラシにより均平された前記育苗箱２内の床土上面よりも上方の待機位置から前記床土上面まで下降して前記育苗箱２の前壁５の隅土を押圧する前壁隅部押圧体１６を設けた取付アーム１３とからなり、該取付アーム１３は前記育苗箱２の移送方向前側上方位置を回動中心とし移送方向後側斜め下方位置に前壁隅部押圧体１６を設け、前記取付アーム１３の前記回動中心は支持アーム２０の先端に設けた取付兼回動規制軸１４とし、前記支持アーム２０は前記取付兼回動規制軸１４の上方で斜め後方に配置し、前記取付アーム１３と前記支持アーム２０の間には前記取付アーム１３を前記取付兼回動規制軸１４中心に下方回動させるように付勢する牽引バネ２２を設け、前記取付アーム１３には先端が前記支持アーム２０側に当接して下方回動を規制するストッパ２４を設け、前記取付兼回動規制軸１４は前記フレーム９側に形成した前記取付兼回動規制軸１４の軸径より大径の回動規制孔１５に係合させて前記支持アーム２０の回動を規制するように構成した育苗箱の隅部床土押圧装置としたものであるから、取付アーム１３と支持アーム２０により隅部床土押圧装置として単独で構成・作用させることができ、前壁隅部押圧体１６を最大押圧位置よりも上方で待機させるので、床土上面に接触するのを防止する効果を奏し、支持アーム２０の回動規制の構成も簡素にでき、部品点数を少なくして製造組立を簡単にし、全体のコストを低くすることができる効果を奏する。
本発明は、前記支持アーム２０には前記前壁隅部押圧体１６が前記待機位置に復帰する速度を調節する錘２６を設けた育苗箱の隅部床土押圧装置としたものであるから、前壁隅部押圧体１６の過剰下降による床土上面に窪み形成を防止するという効果を奏する。
【図面の簡単な説明】
【図１】 全体側面図。
【図２】 前壁隅部押圧機構の分解斜視図。
【図３】 図１の部分拡大図。
【図４】 待機状態で育苗箱が当接したときの作用状態図。
【図５】 取付アームの取付兼回動規制軸が上動したときの作用状態図。
【図６】 前壁が通過するときの作用状態図。
【図７】 押圧状態の作用状態図。
【図８】 後壁隅部押圧機構を設けた側面図。
【符号の説明】
１…移送台、２…育苗箱、３…移送ロール、４…後壁、５…前壁、６…隅部押圧装置、７…前壁隅部押圧機構、９…フレーム、１０…側板、１１…取付板、１３…取付アーム、１４…取付兼回動規制軸、１５…回動規制孔、１６…前壁隅部押圧体、１７…押圧部、１８…傾斜案内面、２０…支持アーム、２１…全体回動中心軸、２２…牽引バネ、２３…連結体、２４…ストッパ、２５…連結体、２６…錘、３０…後壁隅部押圧機構、３１…後壁隅用アーム、３２…取付軸、３３…回転部材、３４…下部取付軸、３５…後壁隅部押圧体、３６…下部軸、３７…バネ、３８…ピン、３９…ストッパー、４０…回動規制軸、４１…回動規制孔、４２…バネ、４４…湾曲部。[0001]
[Industrial application fields]
The present invention relates to a corner floor soil pressing device for a seedling box.
[0002]
[Prior art]
Japanese Unexamined Utility Model Publication No. 60-190245 discloses a configuration in which a base portion of a mounting arm having a front wall corner pressing body is rotatably attached to a frame. Further, in the publicly known Japanese Patent Application Laid-Open No. 2-190120, a frame provided at a position above a transfer stand for laterally feeding a seedling box and a descent from a standby position above the floor soil upper surface of the seedling box to the floor soil upper surface. And a mounting arm provided with a front wall corner pressing body that presses the corner of the front wall of the seedling box, and the mounting arm waits above the maximum pressing position of the front wall corner pressing body. It describes about the corner floor soil pressing apparatus of the seedling box comprised in 1).
[0003]
[Problems to be solved by the invention]
Among the known examples, the front wall corner pressing device described in Japanese Utility Model Laid-Open No. 60-190245 is configured to be integrated with the pressure reducing roller, so no pressure reduction is required, but only the corner portion is desired to be pressed. There is a problem that can not be. Also, since the front wall corner pressing body is provided at the lower rear end of the arm, when the front wall corner pressing body is arranged on the front side of the frame, the front wall corner pressing body at the tip of the arm is lowered. I can't push the corner of the front wall backward. In addition, since the standby height and the pressing position are the same, the front wall corner pressing body comes into sliding contact with the upper surface of the floor soil, causing another problem such as accumulation of soil.
In this respect, the one described in Japanese Patent Laid-Open No. 2-190120 solves the above-mentioned problem, but because of the configuration interlocked with the rear wall corner pressing arm of the rear wall corner pressing mechanism, some cause (preceding) If the rear wall corner pressing device does not operate when there is a gap more than the specified gap between the seedling box and the subsequent seedling box, or when the thickness of the front and rear walls of the seedling box is thicker or thinner than the specified value) There is a problem that the part pressing mechanism also does not operate. In addition, since the structure is linked, there is a problem that the structure is complicated, the production and assembly is troublesome, and the cost is high.
[0004]
OBJECT OF THE INVENTION
An arm-rotating front wall corner pressing device that waits at a position above the floor soil to prevent sliding contact, realizes independent operation, simplifies the configuration of the front wall corner pressing device, and facilitates vertical adjustment The purpose is to facilitate assembly, assembly and installation.
[0005]
[Means for Solving the Problems]
The present invention includes a frame 9 provided at an upper position of a transfer table 1 for laterally feeding the seedling box 2 and attached to the frame 9. The height position is in contact with the upper surface of the front wall 5 of the nursery box 2 being traversed and leveled by a rotating leveling brush The nursery box 2 Inside From the top of the floor soil Also From the upper standby position Said The mounting arm 13 is provided with a front wall corner pressing body 16 that descends to the upper surface of the floor soil and presses the corner of the front wall 5 of the seedling box 2. It is attached to the tip of a support arm 20 whose base is fixed to the frame 9 by an attachment and rotation restricting shaft 14; The mounting / rotation restricting shaft 14 is engaged with a rotation restricting hole 15 having a diameter larger than the shaft diameter of the mounting / rotation restricting shaft 14 formed on the frame 9 side to restrict the rotation of the support arm 20. Configured as follows, By moving the mounting and rotation restricting shaft 14 up and down by the rotation of the support arm 20, the front wall corner pressing body 16 is moved. Get over the front wall 5 of the nursery box 2 from the maximum pressing position Above the maximum pressing position From the top surface of the floor soil Upward Standby position It is set as the corner floor soil pressing apparatus of the seedling box comprised so that it might stand by.
The present invention in front Mounting and rotation restricting shaft 14 Is the inner periphery of the rotation restricting hole 15 Move only from one of the top and bottom to the other Of the support arm 20 This is a corner floor soil pressing device for a nursery box in which the rotation is restricted.
In the present invention, between the mounting arm 13 and the support arm 20, a traction spring 22 that urges the front wall corner pressing body 16 to be always lowered, and the mounting arm 13. Against the support arm 20 This is a corner floor soil pressing device for a seedling box provided with a stopper 24 that waits at a predetermined position.
The present invention includes a frame 9 provided at an upper position of a transfer table 1 for laterally feeding the seedling box 2 and attached to the frame 9. The height position is in contact with the upper surface of the front wall 5 of the nursery box 2 being traversed and leveled by a rotating leveling brush The nursery box 2 Inside From the top of the floor soil Also From the upper standby position Said The mounting arm 13 is provided with a front wall corner pressing body 16 that descends to the upper surface of the floor soil and presses the corner of the front wall 5 of the seedling box 2, and the mounting arm 13 is a transfer direction of the seedling box 2. A front wall corner pressing body 16 is provided at a position obliquely below the rear side in the transfer direction with the front upper position as a rotation center, and the rotation center of the mounting arm 13 is an attachment and rotation regulating shaft provided at the tip of the support arm 20. 14 and the support arm 20 is disposed obliquely rearward above the attachment / rotation restriction shaft 14, and the attachment arm 13 is disposed between the attachment arm 13 and the support arm 20. 14 is provided with a traction spring 22 that is urged to rotate downward, and the attachment arm 13 is provided with a stopper 24 whose tip is in contact with the support arm 20 side and restricts downward rotation. The movement regulating shaft 14 is on the frame 9 side. The formed A diameter larger than the shaft diameter of the mounting and rotation restricting shaft 14 The seedling box corner floor soil pressing device is configured to be engaged with the rotation restricting hole 15 to restrict the rotation of the support arm 20.
In the present invention, the support wall 20 is provided with the front wall corner pressing body 16. Said This is a corner bed soil pressing device for a seedling box provided with a weight 26 for adjusting the speed of returning to the standby position.
[0006]
【Example】
An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a transfer stand, 2 denotes a seedling box, and the transfer stand 1 transfers the seedling box 2 in the direction B. Reference numeral 3 denotes a transfer roll for transferring the seedling box 2. The transfer stand 1 is provided with a front wall corner pressing mechanism 7 of a corner pressing device 6 that presses the floor soil at the corner of the front wall 5 on the front side in the transfer direction of the seedling box 2.
A lower end of the side plate 10 of the frame 9 is fixed to the transfer table 1, and mounting plates 11 and 11 are attached to the side plates 10 and 10 through a link mechanism (not shown) so as to be freely movable up and down. Reference numeral 12 denotes a height adjustment dial for moving the mounting plate 11 up and down.
Thus, a pair of left and right mounting arms 13 are arranged outside the left and right side plates 10, and a mounting and turning restriction shaft 14 in the left and right direction is mounted on the front side of the mounting arm 13 in the middle of the front and rear. The cum-rotation restricting shaft 14 is inserted into a rotation restricting hole 15 formed in the mounting plate 11 and pivoted. A front wall corner pressing body 16 that presses a corner of the front wall 5 of the seedling box 2 is attached to the rear portion of the mounting arm 13. The front wall corner pressing body 16 is formed in a flat plate shape in the left-right direction, the front side is formed as a substantially horizontal pressing portion 17, and the slope is inclined so as to increase toward the rear side following the pressing portion 17. The guide surface 18 is formed.
[0007]
The lower end of a pair of left and right support arms 20 that pivot the entire mounting arm 13 is pivotally attached to the mounting / rotation restricting shaft 14, and the base of the support arm 20 protrudes rearward and upward, and the entire pivot axis 21 is rotatably attached to the mounting plate 11. That is, the support arm 20 is provided to move up and down the mounting / rotation restricting shaft 14 which is the center of rotation of the mounting arm 13 so that the front wall corner pressing body 16 waits above the floor soil upper surface. The relationship between the mounting arm 13 and the support arm 20 is that when the support arm 20 is rotated downward about the entire rotation center axis 21, the front wall corner pressing body 16 is separated from the floor soil, and the support arm 20 is rotated as a whole. When the upper wall corner pressing body 16 is pivoted upward about the moving center shaft 21, the front wall corner pressing body 16 is lowered, and when the mounting arm 13 is further rotated about the mounting and rotation regulating shaft 14, the front wall corner pressing body 16 is moved to the front wall. Press the floor soil at the corner of 5. Therefore, the mounting arm 13 is arranged with the front wall corner pressing body 16 at the obliquely lower position on the rear side in the transfer direction, and the upper position on the front side in the transfer direction of the seedling box 2 as the rotation center (attachment and rotation regulating shaft 14). The base portion of the support arm 20 is attached to the rear of the mounting and rotation restricting shaft 14 and obliquely rearward.
[0008]
The support arm 20 only needs to move the mounting / rotation restricting shaft 14 up and down within a predetermined range and restrict the rotation of the support arm 20, but the mounting / turning restricting shaft 14 is attached to the mounting arm 13 and the support arm. The rotation restricting mechanism of the support arm 20 is simplified by using the stopper 20 as well as providing the attachment plate 11 with the rotation restricting hole 15.
Depending on the arrangement of the support arm 20 and the mounting / rotation restricting shaft 14, when the mounting / turning restricting shaft 14 is moved up, the standby position is set, and when the mounting / rotation restricting shaft 14 is moved down, the vertical position is reversed to the pressing position. Is also possible.
Thus, between the front end of the mounting arm 13 and the overall rotation central shaft 21, the front end of the traction spring 22 that constantly urges the front wall corner pressing body 16 to rotate downward is locked. The rear end of the traction spring 22 is engaged with the entire rotation center shaft 21. The traction spring 22 uses the advancing force of the seedling box 2 to rotate the mounting arm 13 so that the front wall corner pressing body 16 presses the floor soil at the corner of the front wall 5.
[0009]
A connecting body 23 is provided on the mounting arm 13 on the front side of the mounting / rotation restricting shaft 14, and a stopper 24 is provided at the center of the left and right of the connecting body 23, and the upper end of the stopper 24 is the support arm 20. It is made to contact | abut to the lower surface of the connection body 25 provided in the lower part. Accordingly, the mounting arm 13 urged by the traction spring 22 to rotate downward about the mounting / rotation restricting shaft 14 is restricted from rotating downward by the stopper 24 coming into contact with the connecting body 25.
Note that the traction spring 22 does not affect the rotation of the support arm 20 in both the upper and lower directions, and the support arm 20 is suspended from the entire rotation center shaft 21, and the mounting arm 13 and the support arm 20 are pulled. The spring 22 and the stopper 24 are suspended from the entire rotation center shaft 21 while maintaining the same angle state by the action of the spring 22 and the stopper 24, and the mounting and rotation restricting shaft 14 comes into contact with the lower edge of the inner periphery of the rotation restricting hole 15. When the front wall corner pressing body 16 presses, the mounting arm 13 rotates about the mounting and rotation regulating shaft 14 as will be described later.
[0010]
Accordingly, the overall rotation center shaft 21 is provided with a weight (balancer) 26. The weight 26 resists the downward rotation of the support arm 20 and delays the return to the standby position, and the front wall corner pressing body. 16 prevents the depression on the top surface of the floor soil.
Thus, the frame 9 is provided with a rear wall corner pressing mechanism 30 for pressing the corner of the rear wall 4. The rear wall corner pressing mechanism 30 fixes the upper part of the left and right rear wall corner arms 31 to a mounting shaft 32 in the left-right direction, and the mounting shaft 32 is mounted on the mounting plate 11. The upper portion of the rotating member 33 is rotatably attached to the lower portion of the rear wall corner arm 31 by the lower mounting shaft 34. A rear wall corner pressing body 35 that presses the corner of the rear wall 4 of the L-shaped seedling raising box 2 in side view is attached to the lower end of the front surface of the rotating member 33 so that the mounting position can be changed up and down. A lower shaft 36 in the left-right direction is provided at the lower part of the rotating member 33, and the lower end of the spring 37 is locked to the lower shaft 36. The upper end of the spring 37 is connected to a pin 38 provided on the arm 31 for the rear wall corner. The spring 37 is urged so that the rotating member 33 is always rotated backward. In addition, a stopper 39 is provided below the pin 38 of the rear wall corner arm 31 to stop the rotating member 33 from rotating backward. The lower shaft 36 is arranged so as not to exceed the so-called dead center with respect to the lower mounting shaft 34. A left and right rotation restricting shaft 40 is provided at an intermediate portion of the rear wall corner arm 31, and both ends of the turn restricting shaft 40 are positioned in a rotation restricting hole 41 formed in the mounting plate 11. A spring 42 is provided between the rear wall corner arm 31 and the frame 9 side, and urges the rear wall corner arm 31 to always rotate upward.
[0011]
Therefore, the arm 31 for the rear wall corner is in a standby position when the rotation restricting shaft 40 is engaged with the upper inner periphery of the rotation restricting hole 41, and the rotation restricting shaft 40 is disposed on the lower inner periphery of the rotation restricting hole 41. When engaged, the lowermost position is reached.
Accordingly, several types of adjusting bodies (not shown) having different positions on the inner peripheral surface are prepared, and the adjusting bodies are appropriately selected and provided so as to be engaged with the end of the rotation restricting shaft 40. That is, by providing the adjusting body, the position where the rotation restricting shaft 40 abuts the inner periphery of the rotation restricting hole 41 is changed, so that the turning angle of the rear wall corner arm 31 is changed, and the rear wall corner is changed. The pressing depth of the partial pressing body 35 is changed.
In addition, the front wall corner pressing body 16 is disposed at a position where the rotation member 33 of the rear wall corner pressing mechanism 30 does not interfere with the rotation when the rotation member 33 gets over the front wall 5 and the rear wall 4, and the mounting arm 13. A part of the rear side is formed into a curved portion 44 that allows the rear wall corner pressing mechanism 30 to be mounted and operated on the same frame 9.
[0012]
[Action]
Next, the operation will be described.
Since this invention is the above structure, if the seedling box 2 is supplied to the transfer stand 1, the seedling box 2 will be moved to a direction, and floor soil will be supplied by the upper floor soil supply apparatus during transfer.
The floor soil is supplied to many eyes and removed, so that the upper surface of the floor soil is leveled by a rotating leveling brush, and the rear wall 4 and the front wall 5 of the seedling box 2 are cornered. The excess corner soil accumulated in the part is pressed by the front wall corner pressing mechanism 7 of the corner pressing device 6. In addition, the transfer speed | rate of the said seedling box 2 is arbitrary with about 200 boxes-1500 boxes per hour.
[0013]
The mounting arm 13 of the front wall corner pressing mechanism 7 is biased by the traction spring 22 so as to rotate downward about the mounting / rotation restricting shaft 14, and the stopper 24 abuts on the connecting body 25 to restrict downward rotation. However, the traction spring 22 does not affect the rotation of the support arm 20, and the support arm 20 is suspended from the entire rotation center shaft 21, so that the mounting arm 13 and the support arm 20 are at the same angle. The suspension arm is suspended from the entire rotation center shaft 21 while maintaining the state. Therefore, the support arm 20 is rotated about the entire rotation center shaft 21 by its own weight, and the attachment / rotation restriction shaft 14 is rotated to the rotation restriction hole 15. It stands by abutting against the lower edge of the inner circumference.
In this state, the seedling box 2 is supplied to the transfer stand 1 and the floor soil is supplied, and the upper surface of the floor soil is leveled by the rotating leveling brush, or the floor soil is supplied and the floor soil is supplied by the rotating leveling brush. When the seedling box 2 having a flat upper surface is supplied to the transfer table 1, the front wall 5 of the seedling box 2 comes into contact with the inclined guide surface 18 of the front wall corner pressing body 16. Since the nursery box 2 pushes the inclined guide surface 18 forward, the mounting arm 13 rotates about the entire rotation center axis 21, and the attachment / rotation restriction shaft 14 also rotates about the entire rotation center axis 21. As a result, the attachment and rotation restricting shaft 14 abuts on the upper inner peripheral surface of the rotation restricting hole 15 by turning around the center turning center axis 21 of the support arm 20.
[0014]
When the mounting and rotation restricting shaft 14 abuts on the upper inner peripheral surface of the rotation restricting hole 15, the upper turning of the support arm 20 is restricted, so that the support arm 20 stops but the front wall corner pressing body. Since 16 is pushed further forward by the seedling box 2, the mounting arm 13 rotates upward about the mounting / rotation restricting shaft 14 in a state of contacting the upper inner peripheral surface of the rotation restricting hole 15.
When the mounting arm 13 rotates upward about the mounting / rotation restricting shaft 14, the traction spring 22 extends, and in this state, the front wall 5 of the seedling box 2 extends below the pressing portion 17 of the front wall corner pressing body 16. The front wall corner pressing body 16 rotates downward about the mounting / rotation restricting shaft 14 in a state where it abuts on the upper inner peripheral surface of the rotation restricting hole 15 due to the elastic force of the traction spring 22 contracting. The front wall corner pressing body 16 presses the corner soil of the front wall 5 of the seedling box 2 deeper than the standby position to level out.
[0015]
When the front wall corner pressing body 16 presses the corner soil of the front wall 5, the support arm 20 rotates downward about the entire rotation center axis 21 by the weight of the support arm 20 and the mounting arm 13, and the rotation restriction hole 15. The mounting and rotation restricting shaft 14 comes into contact with the lower inner peripheral surface of the lower side, the downward rotation of the support arm 20 and the mounting arm 13 is stopped, and the front wall corner pressing body 16 is located above the floor soil upper surface by a predetermined interval. And wait.
That is, the mounting arm 13 is in a standby position when the mounting and rotation restricting shaft 14 is in contact with the lower inner peripheral surface of the rotation restricting hole 15, and is attached to the upper inner peripheral surface of the rotation restricting hole 15. When the rotation restricting shaft 14 is in contact, the pressing position is set, and the rotation center is the entire rotation center axis 21. Therefore, when the entire rotation center axis 21 is used as a reference, the standby position is attached rather than the pressing position. The cum rotation restricting shaft 14 can be positioned upward by the amount of rotation in the rotation restricting hole 15. Therefore, it is possible to prevent the front wall corner pressing body 16 from coming into contact with the floor soil upper surface in the standby state. In this respect, in the known example, since the position of the rotation center does not change, the standby height and the pressing height become the same, and a slight pressing shortage occurs or the sliding surface touches the floor soil.
[0016]
Further, when the mounting arm 13 rotates upward, the traction spring 22 extends, and in this state, the front wall 5 of the seedling box 2 passes under the pressing portion 17 of the front wall corner pressing body 16 and the front wall corner portion. The pressing body 16 rotates downward about the mounting / rotation restricting shaft 14 in a state of being in contact with the upper inner peripheral surface of the rotation restricting hole 15 due to the elastic force of the traction spring 22 being contracted. Also, since the front wall corner pressing body 16 presses, it is leveled by pressing deeper than the standby position.
Further, when the front wall corner pressing body 16 presses the corner of the front wall 5, the support arm 20 rotates downward about the entire rotation center axis 21, so that the front wall corner pressing body 16 is more than the pressing position. Although it returns to the upper standby position, since the weight 26 is provided on the overall rotation center shaft 21, the speed at which the support arm 20 rotates downward is reduced, and the front wall corner pressing body 16 is moved to the floor soil. Slow away from the top surface. That is, the front wall corner pressing body 16 pushes the corner soil to the same height as the top surface of the floor soil supplied to the seedling box 2, but the height of the top surface of the floor soil varies depending on the seedling box 2. When the portion pressing body 16 is deeply pressed and immediately moved upward, a step is generated at the boundary portion between the portion pressed by the front wall corner pressing body 16 and the floor soil upper surface, but the front wall corner pressing body 16 is When it is slowly moved upward, it can be moved upward while leveling the step by the front wall corner pressing body 16. The speed at which the front wall corner pressing body 16 moves upward is adjusted by the weight 26, and the weight 26 is movable in the axial direction.
[0017]
When the same seedling box 2 has different floor soil supply depths, the stopper 24 is turned in the state shown in FIG. 7 to rotate the mounting arm 13 with respect to the mounting and rotation regulating shaft 14. Adjust. Further, when the height of the seedling box 2 is different, the height is adjusted to the whole mounting plate 11 by 12.
Thus, the rear wall corner pressing mechanism 30 has its rear wall corner arm 31 restricted from rotating upward by the rotation restricting shaft 40 and the rotation restricting hole 41, so that the rear wall corner pressing body 35 is moved into the seedling box 2. Although it does not contact the floor soil upper surface, it waits at the height which collides with the rear wall 4 of the seedling box 2.
In this state, the front wall 5 of the seedling box 2 comes into contact with the rear surface of the rear wall corner pressing body 35, and the rear wall corner pressing body 35 is advanced by the forward movement of the front wall 5 of the seedling growing box 2. Since there is a spring 37 between the rear wall corner pressing body 35 and the rear wall corner arm 31, the rear wall corner pressing body 35 rotates the rear wall corner arm 31 about the mounting shaft 32. When the rotation restricting shaft 40 comes into contact with the lower inner periphery of the rotation restricting hole 41 by the downward rotation of the rear wall corner arm 31, the downward rotation of the rear wall corner arm 31 is stopped. The corner pressing body 35 is further advanced by the moving seedling box 2 to rotate the rotating member 33 upward about the lower mounting shaft 34 against the spring 37, and the lower end of the rear wall corner pressing body 35 is the front wall. When the upper wall 5 is rotated to the upper end, the front wall 5 passes below the rear wall corner pressing body 35.
[0018]
Then, the rear wall corner pressing body 35 rotates together with the rotating member 33 around the lower mounting shaft 34 by the elasticity of the spring 37, the rotating member 33 contacts the stopper 39, and the rotation stops. The arm 31 is also rotated upward by the elastic force of the spring 42, the rotation restricting shaft 40 is brought into contact with the upper inner periphery of the rotation restricting hole 41, the rotation of the rear wall corner arm 31 is stopped, and the rear wall corner is pressed. The body 35 waits at its original height.
Next, the rear wall corner pressing body 35 that is waiting for the set height of the floor soil surface over the front wall 5 abuts against the front surface (inner surface) of the rear wall 4, and as described above, the rear wall The corner arm 31 is rotated downward, and the rear wall corner pressing body 35 is lowered with respect to the floor soil while sliding on the front surface of the front wall 5 by the downward rotation of the rear wall corner arm 31. When the rear wall corner arm 31 is rotated until it stops by the rotation restricting shaft 40 and the rotation restricting hole 41, the rear wall corner pressing body 35 presses the corner soil of the rear wall 4 to the maximum to make it flat. The rear wall 4 is overcome by the same action as when the front wall 5 is overcome.
[0019]
In fact, when the front wall 5 of the seedling box 2 passes below the rear wall corner pressing body 35 of the rear wall corner pressing mechanism 30 and the seedling box 2 further advances, at this time, the front wall corner The front wall corner pressing body 16 of the portion pressing mechanism 7 presses the corner soil of the front wall 5, and the front wall corner pressing mechanism 7 is described first. In addition, for the sake of easy understanding, the explanation of the above-described operation is explained by moving the seedling box 2 of one box. However, in actual work, the seedling box 2 is continuously transferred without a gap. The rear wall 4 of the succeeding nursery box 2 moves in contact with the rear wall 4 of the subsequent nursery box 2, so that the rear wall corner pressing mechanism 30 and the front wall corner pressing mechanism 7 are connected to the rear wall 4 and the front wall. 5, and the front wall corner pressing body 16 of the front wall corner pressing mechanism 7 moves upward in contact with the inner surface of the rear wall 4 to get over the rear wall 4 and the front wall 5. Acts when the passes.
[0020]
【effect】
The present invention includes a frame 9 provided at an upper position of a transfer table 1 for laterally feeding the seedling box 2 and attached to the frame 9. The height position is in contact with the upper surface of the front wall 5 of the nursery box 2 being traversed and leveled by a rotating leveling brush The nursery box 2 Inside From the top of the floor soil Also From the upper standby position Said The mounting arm 13 is provided with a front wall corner pressing body 16 that descends to the upper surface of the floor soil and presses the corner of the front wall 5 of the seedling box 2. It is attached to the tip of a support arm 20 whose base is fixed to the frame 9 by an attachment and rotation restricting shaft 14; The mounting / rotation restricting shaft 14 is engaged with a rotation restricting hole 15 having a diameter larger than the shaft diameter of the mounting / rotation restricting shaft 14 formed on the frame 9 side to restrict the rotation of the support arm 20. Configured as follows, By moving the mounting and rotation restricting shaft 14 up and down by the rotation of the support arm 20, the front wall corner pressing body 16 is moved. Get over the front wall 5 of the nursery box 2 from the maximum pressing position Above the maximum pressing position From the top surface of the floor soil Upward Standby position Since the front wall corner pressing body 16 is made to stand by above the maximum pressing position, it is necessary to contact the floor soil upper surface. There is an effect that it can be prevented. In addition, since the mounting arm 13 and the support arm 20 can be configured independently as a corner floor soil pressing device, the design flexibility of the rear wall corner pressing mechanism 30 is expanded, space is effectively used, and the corners of the front and rear walls are pressed. Both of them can be attached to the frame 9 integrally, and assembly and assembly are also facilitated.
The present invention in front Mounting and rotation restricting shaft 14 Is the inner periphery of the rotation restricting hole 15 Move only from one of the top and bottom to the other Of the support arm 20 Since it is a corner floor soil pressing device for a nursery box that is restricted from rotating, the front wall corner pressing body 16 has an effect that the configuration in which the front wall corner pressing body 16 stands by above the maximum pressing position can be simplified.
In the present invention, between the mounting arm 13 and the support arm 20, a traction spring 22 that urges the front wall corner pressing body 16 to be always lowered, and the mounting arm 13. Against the support arm 20 Since the corner floor soil pressing device of the seedling box provided with the stopper 24 to be kept in a predetermined position is constituted by the mounting arm 13 and the support arm 20 alone as the corner floor soil pressing device, There is an effect that can be caused to act.
The present invention includes a frame 9 provided at an upper position of a transfer table 1 for laterally feeding the seedling box 2 and attached to the frame 9. The height position is in contact with the upper surface of the front wall 5 of the nursery box 2 being traversed and leveled by a rotating leveling brush The nursery box 2 Inside From the top of the floor soil Also From the upper standby position Said The mounting arm 13 is provided with a front wall corner pressing body 16 that descends to the upper surface of the floor soil and presses the corner of the front wall 5 of the seedling box 2, and the mounting arm 13 is a transfer direction of the seedling box 2. A front wall corner pressing body 16 is provided at a position obliquely below the rear side in the transfer direction with the front upper position as a rotation center, and the rotation center of the mounting arm 13 is an attachment and rotation regulating shaft provided at the tip of the support arm 20. 14 and the support arm 20 is disposed obliquely rearward above the attachment / rotation restriction shaft 14, and the attachment arm 13 is disposed between the attachment arm 13 and the support arm 20. 14 is provided with a traction spring 22 that is urged to rotate downward, and the attachment arm 13 is provided with a stopper 24 whose tip is in contact with the support arm 20 side and restricts downward rotation. The movement regulating shaft 14 is on the frame 9 side. The formed A diameter larger than the shaft diameter of the mounting and rotation restricting shaft 14 Since the corner bed soil pressing device of the seedling box is configured to be engaged with the rotation restriction hole 15 to restrict the rotation of the support arm 20, the corner portion is formed by the mounting arm 13 and the support arm 20. The floor soil pressing device can be configured and operated independently, and the front wall corner pressing body 16 is made to stand by above the maximum pressing position, so that it has an effect of preventing contact with the floor soil upper surface. The configuration of the 20 rotation restriction can be simplified, the number of parts can be reduced, manufacturing and assembly can be simplified, and the overall cost can be reduced.
In the present invention, the support wall 20 is provided with the front wall corner pressing body 16. Said Since the corner bed soil pressing device of the nursery box provided with the weight 26 for adjusting the speed of returning to the standby position is used, the formation of a depression on the floor soil upper surface due to excessive lowering of the front wall corner pressing body 16 is prevented. There is an effect.
[Brief description of the drawings]
FIG. 1 is an overall side view.
FIG. 2 is an exploded perspective view of a front wall corner pressing mechanism.
FIG. 3 is a partially enlarged view of FIG. 1;
FIG. 4 is an operational state diagram when the seedling box abuts in a standby state.
FIG. 5 is an operational state diagram when the attachment arm rotation / rotation restricting shaft is moved upward.
FIG. 6 is an operational state diagram when the front wall passes.
FIG. 7 is an operational state diagram of a pressed state.
FIG. 8 is a side view provided with a rear wall corner pressing mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Transfer stand, 2 ... Seedling box, 3 ... Transfer roll, 4 ... Rear wall, 5 ... Front wall, 6 ... Corner pressing device, 7 ... Front wall corner pressing mechanism, 9 ... Frame, 10 ... Side plate, 11 DESCRIPTION OF SYMBOLS ... Mounting plate, 13 ... Mounting arm, 14 ... Mounting and rotation control shaft, 15 ... Turning control hole, 16 ... Front wall corner pressing body, 17 ... Pressing part, 18 ... Inclined guide surface, 20 ... Support arm, DESCRIPTION OF SYMBOLS 21 ... Whole rotation center axis, 22 ... Traction spring, 23 ... Connection body, 24 ... Stopper, 25 ... Connection body, 26 ... Weight, 30 ... Rear wall corner pressing mechanism, 31 ... Rear wall corner arm, 32 ... Mounting shaft 33 ... Rotating member 34 ... Lower mounting shaft 35 ... Back wall corner pressing body 36 ... Lower shaft 37 ... Spring 38 ... Pin 39 ... Stopper 40 ... Rotation restricting shaft 41 ... Time Movement restricting hole, 42... Spring, 44.
