JP5266003B2 - Agricultural machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agricultural work machine performing appropriate land grading work. <P>SOLUTION: The agricultural work machine 1 includes a tillage body, and a land grading body 21 changing the tilt angle according to the tilling depth of the tillage body. Furthermore, ends in the right and left directions of the land grading body 21 are rotatably provided with each extended land grading body 31 which changes into a developed operative state for protruding from the ends in the right and left directions of the land grading body 21 toward the oblique front outer lateral side and a folded inoperative state located on the land grading body 21. The extended land grading body is composed so that the side of the outer end of the extended land grading body 31 in the developed operative state is lowered and located below the land grading body 21 by a reduction in the tilt angle of the land grading body 21. The extended land grading body 31 has a plurality of ground contacting surfaces 51, 52, and 53 having different tilt angles to the horizontal direction when viewed from the side during the state of the developed operative state. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、適切な整地作業ができる農作業機に関するものである。   The present invention relates to an agricultural machine that can perform appropriate leveling work.

従来、例えば下記の特許文献１に記載された農作業機が知られている。   DESCRIPTION OF RELATED ART Conventionally, the agricultural working machine described in the following patent document 1, for example is known.

この従来の農作業機は、所定方向に回転しながら耕耘作業をする耕耘体と、耕耘体の後方で水平方向に対して傾斜した前高後低の傾斜姿勢で整地作業をし耕耘体の耕耘深さに応じて傾斜角度が変化する整地体と、整地体の左右方向端部に回動可能に設けられ一方向への回動により整地体の左右方向端部から斜め前外側方に向って突出する展開作業状態となり他方向への回動により整地体上に位置する折畳非作業状態となる延長整地体とを備え、この延長整地体は、下方に向って凸の円弧板状に形成されている。
特開２００６−２０４１６３号公報（図２） This conventional farming machine has a tilling body that performs tilling work while rotating in a predetermined direction, and a tilling depth of the tilling body by performing leveling work in front and rear and low-tilting posture inclined with respect to the horizontal direction behind the tilling body. A leveling body whose inclination angle changes according to the height, and is provided rotatably at the left and right ends of the leveling body and protrudes obliquely forward and outward from the left and right ends of the leveling body by rotating in one direction. And an extended leveling body that is placed on the leveling body by turning in the other direction and becomes a non-folding working state, and this extended leveling body is formed in a circular arc plate shape convex downward. ing.
Japanese Patent Laying-Open No. 2006-204163 (FIG. 2)

しかしながら、上記従来の農作業機では、延長整地体は下方に向って凸の円弧板状に形成されているため、延長整地体が線状に圃場面に接することとなり、適切な整地作業ができないおそれがある。   However, in the above conventional farm work machine, the extended leveling body is formed in the shape of a circular arc plate that protrudes downward, so that the extended leveling body comes into contact with the field scene linearly, and appropriate leveling work may not be possible. There is.

本発明は、このような点に鑑みなされたもので、適切な整地作業ができる農作業機を提供することを目的とする。   This invention is made | formed in view of such a point, and it aims at providing the agricultural machine which can perform suitable leveling work.

請求項１記載の農作業機は、所定方向に回転しながら耕耘作業をする耕耘体と、この耕耘体の後方で水平方向に対して傾斜した前高後低の傾斜姿勢で整地作業をし、前記耕耘体の耕耘深さに応じて傾斜角度が変化する整地体と、この整地体の左右方向端部に回動可能に設けられ、一方向への回動により前記整地体の左右方向端部から斜め前外側方に向って突出する展開作業状態となり、他方向への回動により前記整地体上に位置する折畳非作業状態となる延長整地体とを備え、前記整地体の傾斜角度の減少により前記展開作業状態の延長整地体の外端側が前記整地体より下方に位置する構成になっており、前記延長整地体は、前記整地体の被取付部に回動可能に取り付けられた取付板部と、この取付板部に固着され、平面視で内端側から外端側に向って徐々に幅が広がる本体板部とを有し、前記本体板部は、展開作業状態時において側面視で水平方向に対する傾斜角度が異なる複数の接地面を有し、圃場の土質に応じて前記展開作業状態の延長整地体の外端下限位置が調整可能であるものである。 The agricultural machine according to claim 1, wherein the farming body performs the tilling work while rotating in a predetermined direction; A leveling body whose inclination angle changes according to the tilling depth of the tillage body, and is provided rotatably at the left and right end portions of the leveling body. From the left and right end portions of the leveling body by turning in one direction An extended leveling body that is in an unfolded working state that protrudes obliquely toward the front outer side, and that is in a folded non-working state that is positioned on the leveling body by rotating in the other direction, and reducing the inclination angle of the leveling body Thus, the extended leveling body in the unfolded working state is configured to be positioned below the leveling body, and the extended leveling body is rotatably attached to the mounted portion of the leveling body. Fixed to the mounting plate and the outer end from the inner end side in plan view And a main plate portion width gradually widens toward the main plate unit may have a plurality of ground plane different inclination angles with respect to the horizontal direction as viewed from the side at the time of deployment work state, depending on the field of soil Thus, the lower limit position of the outer end of the extended leveling body in the unfolded work state can be adjusted .

請求項２記載の農作業機は、請求項１記載の農作業機において、延長整地体は、展開作業状態時において側面視で水平方向に対する傾斜角度が異なる少なくとも３つの接地面を有するものである。   The agricultural machine according to claim 2 is the agricultural machine according to claim 1, wherein the extended leveling body has at least three ground contact surfaces having different inclination angles with respect to the horizontal direction in a side view in the unfolding operation state.

請求項３記載の農作業機は、請求項１または２記載の農作業機において、整地体の傾斜角度が最大値に設定された状態では、展開作業状態の延長整地体の外端側が前記整地体の下端より上方に位置するものである。   The farm machine according to claim 3 is the farm machine according to claim 1 or 2, wherein the outer end side of the extended leveling body in the unfolding work state is the leveling body when the inclination angle of the leveling body is set to the maximum value. It is located above the lower end.

請求項４記載の農作業機は、請求項１ないし３のいずれか一記載の農作業機において、整地体は、左右方向端部に被当接部を有し、延長整地体は、前記被当接部に当接する回動調整可能な当接部を有し、前記当接部は、前記延長整地体の取付板部に回動調整可能に取り付けられ、前記取付板部に対する前記当接部の回動調整により、展開作業状態の延長整地体の外端下限位置が調整可能であるものである。 請 Motomeko 4 agricultural machine described in claims 1 to agricultural machine according to one or more described 3, leveling member has a contacted portion in the lateral direction end portion, the extension leveling member, the object to be those A contact part that can be rotated and abutted on the contact part, and the contact part is attached to the attachment plate part of the extended leveling body so as to be capable of rotation adjustment; By the rotation adjustment, the outer end lower limit position of the extended leveling body in the unfolding work state can be adjusted.

請求項５記載の農作業機は、請求項４記載の農作業機において、延長整地体の当接部は、略角板状に形成され、前記当接部の各辺部には、前記延長整地体の取付板部に突設された突部と係合する凹部が形成されているものである。 The agricultural machine according to claim 5 is the agricultural machine according to claim 4 , wherein the contact portion of the extended leveling body is formed in a substantially square plate shape, and the extended leveling body is provided on each side of the contact portion. A recess is formed that engages with a protrusion protruding from the mounting plate.

請求項１に係る発明によれば、延長整地体は展開作業状態時において側面視で水平方向に対する傾斜角度が異なる複数の接地面を有するため、整地体の傾斜角度が変化しても延長整地体の接地面が圃場面に略面状に接することとなり、適切な整地作業ができ、また、圃場の土質に応じて展開作業状態の延長整地体の外端下限位置が調整可能であるため、圃場の土質に対応でき、より適切な整地作業ができる。 According to the first aspect of the present invention, since the extended leveling body has a plurality of ground contact surfaces having different inclination angles with respect to the horizontal direction in a side view in the unfolding operation state, the extended leveling body is changed even if the inclination angle of the leveling body changes. The ground contact surface of the ground will come into contact with the farm scene in a substantially planar manner, so that appropriate leveling work can be performed , and the outer edge lower limit position of the extended leveling body in the expanded work state can be adjusted according to the soil quality of the field. It is possible to cope with the soil quality of the soil and perform more appropriate leveling work.

請求項２に係る発明によれば、延長整地体は展開作業状態時において側面視で水平方向に対する傾斜角度が異なる少なくとも３つの接地面を有するため、より適切な整地作業ができる。   According to the second aspect of the present invention, the extended leveling body has at least three ground contact surfaces having different inclination angles with respect to the horizontal direction when viewed from the side when deployed, so that more appropriate leveling work can be performed.

請求項３に係る発明によれば、整地体の傾斜角度を最大値に設定することにより、展開作業状態の延長整地体の外端側を整地体の下端より上方に位置させることができる。   According to the invention which concerns on Claim 3, the outer-end side of the extended leveling body of a deployment work state can be located above the lower end of a leveling body by setting the inclination-angle of a leveling body to the maximum value.

請求項４に係る発明によれば、延長整地体の当接部の回動調整によって展開作業状態の延長整地体の外端下限位置を容易に調整できる。 According to the invention of 請 Motomeko 4 can be easily adjusted outer end limit positions of the extension leveling of development work state by the rotation adjustment of the contact portion of the extension leveling member.

本発明の農作業機の一実施の形態を図面を参照して説明する。   An embodiment of an agricultural machine according to the present invention will be described with reference to the drawings.

図１および図２において、１は農作業機で、この農作業機１は、例えば圃場を走行可能な走行車であるトラクタの後部に連結されトラクタの走行により畑等の圃場を進行方向である前方に移動しながら耕耘整地作業をする耕耘整地装置等である。   1 and 2, reference numeral 1 denotes an agricultural machine. The agricultural machine 1 is connected to a rear portion of a tractor, for example, a traveling vehicle capable of traveling in an agricultural field, and moves forward in a traveling direction of a field such as a field by traveling of the tractor. It is a tillage leveling device that performs tillage leveling work while moving.

農作業機１は、トラクタの３点リンク部（作業機昇降装置）に脱着可能に連結される機体２を備えている。   The farm work machine 1 includes a machine body 2 that is detachably connected to a three-point link portion (work machine lifting device) of the tractor.

機体２は左右方向長手状で略円筒状のフレームパイプ等の主フレーム部３を有し、この主フレーム部３の長手方向中央部にはギアボックス部４が設けられている。ギアボックス部４には略前後方向の入力軸５がベアリング（図示せず）を介して回転可能に設けられ、この入力軸５の前端側がトラクタのＰＴＯ軸にユニバーサルジョイントおよび伝動シャフト等を介して接続される。入力軸の後端側にはベベルギア等を介して左右方向の伝動シャフトが接続され、この伝動シャフトは主フレーム部３内に回転可能に配設されている。また、機体２は走行車連結部である３点連結部６を有し、この３点連結部６がトラクタの３点リンク部に連結される。   The machine body 2 has a main frame portion 3 such as a substantially cylindrical frame pipe that is longitudinal in the left-right direction, and a gear box portion 4 is provided at the center in the longitudinal direction of the main frame portion 3. The gear box portion 4 is provided with an input shaft 5 in a substantially front-rear direction so as to be rotatable via a bearing (not shown). The front end side of the input shaft 5 is connected to the PTO shaft of the tractor via a universal joint, a transmission shaft, and the like. Connected. A transmission shaft in the left-right direction is connected to the rear end side of the input shaft via a bevel gear or the like, and this transmission shaft is rotatably disposed in the main frame portion 3. The airframe 2 has a three-point connecting portion 6 that is a traveling vehicle connecting portion, and the three-point connecting portion 6 is connected to a three-point link portion of the tractor.

また、機体２の主フレーム部３の長手方向一端部である左端部には、上下方向にやや長手状で箱状の伝動ケース部であるチェーンケース部７の上部が取り付けられ、このチェーンケース部７内には主フレーム部３内の伝動シャフトから動力を受けるチェーンおよびスプロケット（図示せず）が配設されている。主フレーム部３の長手方向他端部である右端部には、上下方向にやや長手状で板状の支持フレーム部であるブラケット部８の上部が取り付けられている。   In addition, an upper portion of a chain case portion 7 that is a box shape transmission case portion that is slightly longer in the vertical direction is attached to the left end portion that is one end portion in the longitudinal direction of the main frame portion 3 of the machine body 2. 7, a chain and a sprocket (not shown) for receiving power from a transmission shaft in the main frame portion 3 are disposed. An upper portion of a bracket portion 8 that is a plate-like support frame portion that is slightly longer in the vertical direction is attached to the right end portion that is the other end portion in the longitudinal direction of the main frame portion 3.

そして、左右に互いに離間対向するチェーンケース部７の下部とブラケット部８の下部との間には、所定方向に回転しながら耕耘作業をするロータリ式の耕耘体11が回転可能に設けられている。この耕耘体11は、機体２の左端部を構成するチェーンケース部７内のチェーンから動力を受けて回転する左右方向の回転軸である耕耘軸12と、この耕耘軸12に取り付けられ軸方向および周方向に間隔をおいて並び耕耘軸12とともに回転して耕耘作業をする複数の耕耘爪13とを有している。耕耘軸12は、軸方向一端部である左端部がチェーンケース部７の下部にて回転可能に支持され、軸方向他端部である右端部がブラケット部８の下部にて回転可能に支持されている。   And between the lower part of the chain case part 7 and the lower part of the bracket part 8 which are spaced apart from each other on the left and right, a rotary-type tilling body 11 that performs tilling work while rotating in a predetermined direction is rotatably provided. . This cultivating body 11 includes a cultivating shaft 12 which is a horizontal rotating shaft which receives power from a chain in a chain case portion 7 constituting the left end portion of the machine body 2, and an axial direction attached to the cultivating shaft 12. It has a plurality of tilling claws 13 that are arranged at intervals in the circumferential direction and rotate together with the tilling shaft 12 to perform the tilling work. The tilling shaft 12 is rotatably supported at the lower end of the chain case portion 7 at the left end, which is one end portion in the axial direction, and is rotatably supported at the lower portion of the bracket portion 8, at the lower end portion in the axial direction. ing.

また、耕耘体11の上方部は上方に向って凸の略円弧板状のカバー部である上方カバー部15にて覆われ、耕耘体11の左右両側方には左右の側方カバー部16が配設されている。   Further, the upper part of the cultivating body 11 is covered with an upper cover part 15 which is a substantially arcuate plate-like cover part projecting upward, and left and right side cover parts 16 are provided on the left and right sides of the cultivating body 11. It is arranged.

そして、機体２の上方カバー部15の後端部には、耕耘体11の後方で水平方向に対して傾斜した前高後低の傾斜姿勢で整地作業をし耕耘体11の耕耘深さＡに応じて水平方向に対する傾斜姿勢の傾斜角度αが変化する略板状の整地体（均平板）21が左右方向の軸部22を中心として上下回動可能に設けられている。つまり、整地体21の前端部である上端部が機体２の上方カバー部15の後端部に左右方向の軸部22を中心として回動可能に取り付けられている。   At the rear end of the upper cover portion 15 of the machine body 2, the ground leveling work is performed with the front, rear, and lower inclination postures inclined with respect to the horizontal direction behind the tillage body 11, and the tillage depth A of the tillage body 11 is reached. Accordingly, a substantially plate-shaped leveling body (flat plate) 21 in which the inclination angle α of the inclination posture with respect to the horizontal direction changes is provided so as to be rotatable up and down around a shaft portion 22 in the left-right direction. In other words, the upper end portion which is the front end portion of the leveling body 21 is attached to the rear end portion of the upper cover portion 15 of the machine body 2 so as to be rotatable around the shaft portion 22 in the left-right direction.

整地体21は、整地作業をする左右方向長手状の本体板部23と、この本体板部23の左右方向両端部に設けられた左右の側板部24とを有している。本体板部23は、前端付近（上端付近）では上方に向って凸となるように湾曲状に曲げられ、後端付近（下端付近）では下方に向って凸となるように湾曲状に曲げられている。また、整地作業時における整地体21の接地圧は接地圧調整手段26により調整可能となっている。   The leveling body 21 includes a main body plate portion 23 that is longitudinal in the left-right direction for performing leveling work, and left and right side plate portions 24 provided at both ends of the main body plate portion 23 in the left-right direction. The main body plate portion 23 is bent in a curved shape so as to protrude upward near the front end (near the upper end), and is bent in a curved shape so as to protrude downward near the rear end (near the lower end). ing. Further, the ground pressure of the leveling body 21 during leveling work can be adjusted by the ground pressure adjusting means 26.

なお、整地体21の傾斜角度αは、本体板部23の前後端側を除く中間部における平面状の作用面23aと水平面とがなす角度である。この傾斜角度αは耕耘深さＡに応じて整地体21が上下回動することにより変化する。   In addition, the inclination angle α of the leveling body 21 is an angle formed by the planar action surface 23a and the horizontal plane in the intermediate portion excluding the front and rear end sides of the main body plate portion 23. The inclination angle α changes as the leveling body 21 rotates up and down according to the tilling depth A.

また、整地体21の左右方向両端部には、一方向である開方向への回動（回動角度は例えば略１８０度）により整地体21の左右方向端部から斜め前外側方に向って突出する展開作業状態となり、他方向である閉方向への回動（回動角度は例えば略１８０度）により整地体21上に位置する折畳非作業状態となる略板状でやや長手状の延長整地体（延長均平板）31が前高後低の傾斜状の軸部（回動支点である回動中心軸線Ｘ）32を中心として回動可能に設けられている。つまり、各延長整地体31の基端部である内端部が、整地体21の左右方向端部の被取付部33に軸部32を中心として回動可能に取り付けられている。   Further, at both ends in the left-right direction of the leveling body 21, turning in the opening direction, which is one direction (the rotation angle is approximately 180 degrees, for example), from the left-right end of the leveling body 21 toward the diagonally front outer side. A projecting and unfolding work state, which is a non-folding working state located on the leveling body 21 by turning in the closing direction which is the other direction (rotation angle is, for example, approximately 180 degrees) An extended leveling body (extended flat plate) 31 is provided so as to be rotatable about a shaft portion (rotation center axis X which is a rotation fulcrum) 32 having a front height and a low height. That is, the inner end portion that is the base end portion of each extended leveling body 31 is attached to the attached portion 33 at the end portion in the left-right direction of the leveling body 21 so as to be rotatable about the shaft portion 32.

そして、耕耘体11の耕耘深さＡに応じて整地体21が上方回動して整地体21の傾斜角度αが減少すると、展開作業状態の延長整地体31の外端側が下動して整地体21の下端より下方に位置する構成になっている。   When the leveling body 21 rotates upward according to the tillage depth A of the tillage body 11 and the inclination angle α of the leveling body 21 decreases, the outer end side of the extended leveling body 31 in the unfolding operation state moves down and the leveling is completed. The structure is located below the lower end of the body 21.

図２には整地体21の傾斜角度αが最大値（略９０度）に設定された状態つまり整地体21の下限状態である非作業状態が示され、この状態では、展開作業状態の延長整地体31の外端側が非作業状態（起立状態）の整地体21の下端より上方に位置している。なお、整地体21の傾斜角度αに拘わらず、展開作業状態の延長整地体31の外端側は、側面視で整地体21の後端側より前方に位置する。   FIG. 2 shows a state in which the inclination angle α of the leveling body 21 is set to the maximum value (approximately 90 degrees), that is, a non-working state that is a lower limit state of the leveling body 21. The outer end side of the body 31 is located above the lower end of the leveling body 21 in the non-working state (standing state). Regardless of the inclination angle α of the leveling body 21, the outer end side of the extended leveling body 31 in the unfolded working state is positioned in front of the rear end side of the leveling body 21 in a side view.

ここで、延長整地体31は、例えば略板状で整地作業をする本体板部36と、この本体板部36に固着された取付板部37と、この取付板部37に固着されたばね受部38とを有している。   Here, the extended leveling body 31 includes, for example, a main body plate portion 36 that performs leveling work in a substantially plate shape, a mounting plate portion 37 that is fixed to the main body plate portion 36, and a spring receiving portion that is fixed to the mounting plate portion 37. 38.

取付板部37は、軸部32を介して整地体21の被取付部33に回動可能に取り付けられている。また、延長整地体31を展開作業状態および折畳非作業状態に保持するための付勢手段としての弾性体であるばね（例えば略円筒状の引張ばね）40の一端部が延長整地体31のばね受部38に取り付けられ、このばね40の他端部が整地体21のばね受部39に取り付けられている。つまり、整地体21と延長整地体31との間には、延長整地体31を付勢して展開作業状態および折畳非作業状態に保持するためのばね40が配設されている。このばね40は、支点越えにより延長整地体31を展開作業状態側に付勢する状態と延長整地体31を折畳非作業状態側に付勢する状態とに切り換わる。   The attachment plate portion 37 is rotatably attached to the attachment portion 33 of the leveling body 21 via the shaft portion 32. Further, one end of a spring (for example, a substantially cylindrical tension spring) 40 that is an elastic body as an urging means for holding the extended leveling body 31 in the unfolded working state and the folded non-working state is The other end of the spring 40 is attached to the spring receiver 39 of the leveling body 21. The spring receiver 38 is attached to the spring receiver 38. That is, a spring 40 is disposed between the leveling body 21 and the extended leveling body 31 to bias the extended leveling body 31 and hold it in the unfolded working state and the folding non-working state. The spring 40 switches between a state in which the extended leveling body 31 is urged toward the unfolding work state and a state in which the extension leveling body 31 is urged toward the non-folding state when the fulcrum is exceeded.

また、図１、図８ないし図１１に示されるように、取付板部37には、略４角形状で板状をなす展開側の当接部（調整板）41が取付具であるボルト42を介して回動調整可能に取り付けられている。   As shown in FIGS. 1 and 8 to 11, the mounting plate portion 37 has a substantially quadrangular plate-shaped development side contact portion (adjustment plate) 41 as a mounting bolt 42. It is attached so that rotation adjustment is possible.

当接部41は、延長整地体31の展開作業状態時に整地体21の左右方向端部の被当接部30に当接し、延長整地体31の開方向への回動を規制する。整地体21の被当接部30は側板部24にて構成されている。当接部41の４つの各辺部の略中央には、取付板部37に突設された突部であるピン43と係合する凹部44が形成されている。   The abutting portion 41 abuts against the abutted portion 30 at the end portion in the left-right direction of the leveling body 21 when the extended leveling body 31 is in the unfolding operation state, and restricts the rotation of the extended leveling body 31 in the opening direction. The contacted portion 30 of the leveling body 21 is composed of a side plate portion 24. In the approximate center of each of the four sides of the contact portion 41, a recess 44 is formed that engages with a pin 43 that is a protrusion protruding from the mounting plate portion 37.

そして、取付板部37に対して当接部41を回動調整してピン43と係合する凹部44を変えることにより、展開作業状態の延長整地体31の外端下限位置が４段階に調整可能である。つまり図８ないし図１１に示すように、取付板部37に対して当接部41を９０度回動させる毎に、延長整地体31の整地体21に対する回動角度が４段階に変化し、展開作業状態の延長整地体31の外端下限位置が変わる。   Then, the outer end lower limit position of the extended leveling body 31 in the unfolded working state is adjusted in four stages by adjusting the rotation of the contact portion 41 with respect to the mounting plate portion 37 and changing the concave portion 44 engaged with the pin 43. Is possible. That is, as shown in FIGS. 8 to 11, each time the contact portion 41 is rotated 90 degrees with respect to the mounting plate portion 37, the rotation angle of the extended leveling body 31 with respect to the leveling body 21 changes in four stages. The lower limit position of the outer end of the extended leveling body 31 in the unfolding work state changes.

また、取付板部37には、延長整地体31の折畳非作業状態時に整地体21の上面に当接し延長整地体31の閉方向への回動を規制する折畳側の当接部46が一体に膨出状に設けられている。   In addition, the mounting plate portion 37 is in contact with the upper surface of the leveling body 21 when the extended leveling body 31 is not in the folded state, and the folding side contact part 46 that restricts the rotation of the extended leveling body 31 in the closing direction. Are integrally formed in a bulging shape.

また一方、本体板部36は、図２の２点鎖線で示されるように、整地体21の傾斜角度αが最大値に設定された状態での延長整地体31の展開作業状態時において、側面視で水平方向に対する前高後低の傾斜角度βがそれぞれ異なる複数、３つの接地面、すなわち例えば少なくとも第１接地面51、第２接地面52および第３接地面53を有している。つまり、本体板部36は、耕耘体11の耕耘深さＡが変化しても延長整地体31が常に圃場面に略面状に接するように、側面視で前高後低の傾斜姿勢の傾斜角度βが異なる複数の接地面51，52，53を有している。第２接地面52の傾斜角度βが第１接地面51の傾斜角度βより大きく、第３接地面53の傾斜角度βが第２接地面52の傾斜角度βより大きい。   On the other hand, as shown by a two-dot chain line in FIG. 2, the main body plate portion 36 has a side surface when the extended leveling body 31 is deployed in a state where the inclination angle α of the leveling body 21 is set to the maximum value. It has a plurality of three ground planes, that is, for example, at least a first ground plane 51, a second ground plane 52, and a third ground plane 53, which have different front and rear inclination angles β with respect to the horizontal direction. In other words, the main body plate portion 36 is inclined with a front, rear, and lower inclination posture in a side view so that the extended leveling body 31 always contacts the field scene even if the tillage depth A of the tiller 11 changes. A plurality of ground planes 51, 52, and 53 having different angles β are provided. The inclination angle β of the second ground surface 52 is larger than the inclination angle β of the first ground surface 51, and the inclination angle β of the third ground surface 53 is larger than the inclination angle β of the second ground surface 52.

なお、各接地面51，52，53の傾斜角度βは、整地体21の傾斜角度αが最大値に設定された状態（整地体21の非作業状態）での延長整地体31の展開作業状態時において、側面視で接地面51，52，53の外端縁と水平面とがなす角度である。この傾斜角度βは整地体21の傾斜角度αの変化に応じて変化する。   In addition, the inclination angle β of each ground contact surface 51, 52, 53 is the unfolding work state of the extended leveling body 31 with the inclination angle α of the leveling body 21 set to the maximum value (the non-working state of the leveling body 21) In some cases, the angle is defined by the outer edge of the ground contact surfaces 51, 52, 53 and the horizontal plane when viewed from the side. This inclination angle β changes according to the change of the inclination angle α of the leveling body 21.

各接地面51，52，53は、整地体21の長手方向に沿った長手状に形成されている。そして、第１接地面51の長手方向に沿った前端に第２接地面52が一体に設けられ、第２接地面52の長手方向に沿った前端に第３接地面53が一体に設けられている。   Each ground surface 51, 52, 53 is formed in a longitudinal shape along the longitudinal direction of the leveling body 21. A second ground plane 52 is integrally provided at the front end along the longitudinal direction of the first ground plane 51, and a third ground plane 53 is integrally provided at the front end along the longitudinal direction of the second ground plane 52. Yes.

また、第１接地面51の長手方向に沿った後端には、整地体21の長手方向に沿った長手状に形成され、整地体21の傾斜角度αが最大値に設定された状態での延長整地体31の展開作業状態時において側面視で水平方向に対して前低後高の傾斜姿勢となる後補助面54が一体に設けられている。さらに、第３接地面53の長手方向に沿った前端には、整地体21の長手方向に沿った長手状に形成され、傾斜角度βが第３接地面53の傾斜角度βよりも大きい前補助面55が一体に設けられている。   Further, the rear end of the first ground contact surface 51 along the longitudinal direction is formed in a longitudinal shape along the longitudinal direction of the leveling body 21, and the inclination angle α of the leveling body 21 is set to the maximum value. When the extended leveling body 31 is in the unfolding operation state, a rear auxiliary surface 54 is provided integrally with the front, lower, and rear inclined postures in the horizontal direction when viewed from the side. Further, the front auxiliary end along the longitudinal direction of the third ground contact surface 53 is formed in a longitudinal shape along the longitudinal direction of the leveling body 21, and the front auxiliary is larger than the inclination angle β of the third ground contact surface 53. Surface 55 is provided integrally.

つまり、本体板部36は、４本の各折曲線に沿って略同じ角度で折り曲げられ全体として下方に向って凸状のもので、折曲線を介して互いに連設され外端側ほど幅広の帯状をなす複数の面である５つの面51，52，53，54，55にて構成されている。本体板部36は、平面視で内端側から外端側に向って徐々に幅が広がる略扇板状に形成されている。   That is, the main body plate portion 36 is bent at substantially the same angle along each of the four folding lines and is convex downward as a whole, and is connected to each other via the folding lines and is wider toward the outer end side. It is composed of five surfaces 51, 52, 53, 54, and 55, which are a plurality of belt-shaped surfaces. The main body plate portion 36 is formed in a substantially fan plate shape that gradually increases in width from the inner end side toward the outer end side in plan view.

次に、上記農作業機１の作用等を説明する。   Next, the operation and the like of the farm work machine 1 will be described.

図３（ａ）および（ｂ）には、図２と同じ作業開始前の状態であって、整地体21の傾斜角度αが最大値に設定された非作業状態が示されている。この状態では、展開作業状態の延長整地体31の外端側が、非作業状態の整地体21の下端より上方に位置している。   FIGS. 3A and 3B show a non-working state in which the inclination angle α of the leveling body 21 is set to the maximum value, which is the same state as that in FIG. 2 before starting the work. In this state, the outer end side of the extended leveling body 31 in the unfolded working state is positioned above the lower end of the leveling body 21 in the non-working state.

なお、作業者は、作業開始前に、予め、圃場の土質等に応じて、延長整地体31の取付板部37に対して当接部41を回動調整して展開作業状態の延長整地体31の外端下限位置を調整しておく（図８ないし図１１参照）。   Before starting the work, the operator adjusts the abutment portion 41 with respect to the mounting plate portion 37 of the extended leveling body 31 in advance according to the soil condition or the like of the field in advance, and the extended leveling body in the unfolding work state. The outer end lower limit position of 31 is adjusted (see FIGS. 8 to 11).

そして、作業者は、土質、圃場状態或いは作業目的等に適した耕耘深さＡで耕耘整地作業を行う。   Then, the worker performs the tilling work at the tilling depth A suitable for the soil quality, the field condition, the work purpose, or the like.

例えば図４（ａ）および（ｂ）に示す状態では、展開作業状態の延長整地体31の第１接地面51が、水平な圃場面に略沿った略水平面状となって作業状態の整地体21の下端と略同じ高さに位置している。そして、この耕耘深さの場合、延長整地体31は、図４（ｃ）に示す状態で整地作業をし、略水平面状の第１接地面51にて圃場面が平らに均される。   For example, in the state shown in FIGS. 4 (a) and 4 (b), the first ground contact surface 51 of the extended leveling body 31 in the unfolded working state is in a substantially horizontal plane substantially along the horizontal field scene and is in the working state. It is located at the same height as the lower end of 21. In the case of this plowing depth, the extended leveling body 31 performs leveling work in the state shown in FIG. 4C, and the field scene is leveled by the first ground contact surface 51 having a substantially horizontal plane.

また、図５（ａ）および（ｂ）に示す状態では、展開作業状態の延長整地体31の外端側が作業状態の整地体21の下端より若干下方に位置するものの、第１接地面51が略水平面状となって作業状態の整地体21の下端と略同じ高さに位置している。そして、この耕耘深さの場合、図４の場合と同様、延長整地体31は、図５（ｃ）に示す状態で整地作業をし、略水平面状の第１接地面51にて圃場面が平らに均される。   Further, in the state shown in FIGS. 5A and 5B, the first ground contact surface 51 is not provided, although the outer end side of the extended leveling body 31 in the unfolded working state is located slightly below the lower end of the leveling body 21 in the working state. It is in a substantially horizontal plane and is located at substantially the same height as the lower end of the ground leveling body 21 in the working state. In the case of this plowing depth, as in the case of FIG. 4, the extended leveling body 31 performs leveling work in the state shown in FIG. Flattened flat.

さらに、図６（ａ）および（ｂ）に示す状態では、展開作業状態の延長整地体31の外端側が作業状態の整地体21の下端より下方に位置し、延長整地体31が外端側ほど下方に位置する傾斜状となっている。   Further, in the state shown in FIGS. 6A and 6B, the outer end side of the extended leveling body 31 in the unfolded working state is located below the lower end of the leveling body 21 in the working state, and the extended leveling body 31 is on the outer end side. It has an inclined shape located below.

そして、この耕耘深さの場合、延長整地体31は、土圧を受けることによりばね40の付勢力に抗して軸部32を中心として上方に回動するため、図６（ｃ）に示す状態となって整地作業をし、略水平面状の第２接地面52にて圃場面が平らに均される。つまり、延長整地体31が土圧によって浮き上がることにより、第２接地面52が略水平面状となって作業状態の整地体21の下端と略同じ高さに位置し、この略水平面状の第２接地面52にて圃場面が平らに均される。   In the case of this tillage depth, the extended leveling body 31 rotates upward about the shaft portion 32 against the urging force of the spring 40 by receiving earth pressure, and therefore, as shown in FIG. In the state, the ground leveling work is performed, and the field scene is leveled by the substantially horizontal second contact surface 52. That is, when the extended leveling body 31 is lifted by the earth pressure, the second ground contact surface 52 is in a substantially horizontal plane and is positioned at substantially the same height as the lower end of the leveling body 21 in the working state. The field scene is leveled at the ground contact surface 52.

また、図７（ａ）および（ｂ）に示す状態では、展開作業状態の延長整地体31の外端側が作業状態の整地体21の下端よりさらに下方に位置し、延長整地体31が外端側ほど下方に位置する図６よりも大きく傾斜した傾斜状となっている。   In the state shown in FIGS. 7A and 7B, the outer end side of the extended leveling body 31 in the unfolded working state is positioned further below the lower end of the leveling body 21 in the working state, and the extended leveling body 31 is in the outer end. The side is inclined more greatly than FIG.

そして、この耕耘深さの場合、延長整地体31は、土圧を受けることによりばね40の付勢力に抗して軸部32を中心として上方に回動するため、図７（ｃ）に示す状態となって整地作業をし、略水平面状の第３接地面53にて圃場面が平らに均される。つまり、延長整地体31が土圧によって浮き上がることにより、第３接地面53が略水平面状となって作業状態の整地体21の下端と略同じ高さに位置し、この略水平面状の第３接地面53にて圃場面が平らに均される。   In the case of this plowing depth, the extended leveling body 31 rotates upward about the shaft portion 32 against the urging force of the spring 40 by receiving earth pressure, and is shown in FIG. In the state, the ground leveling work is performed, and the field scene is leveled by the third ground contact surface 53 having a substantially horizontal plane. That is, when the extended leveling body 31 floats due to earth pressure, the third ground contact surface 53 becomes substantially horizontal and is positioned at substantially the same height as the lower end of the leveling body 21 in the working state. The field scene is leveled at the ground contact surface 53.

このように耕耘体11の耕耘深さが深くなるに従って、延長整地体31の作用面が第１接地面51、第２接地面52および第３接地面53へと順次切り換わるため、延長整地体31による整地性が低下することがない。   As described above, the working surface of the extended ground leveling body 31 is sequentially switched to the first grounding surface 51, the second grounding surface 52, and the third grounding surface 53 as the tillage depth of the tillage body 11 increases. The leveling due to 31 does not deteriorate.

そして、このような農作業機１によれば、延長整地体31は展開作業状態時において側面視で水平方向に対する傾斜角度βが異なる複数の接地面51，52，53を有するため、耕耘体11の耕耘深さＡに応じて整地体21の傾斜角度αが変化しても、複数の接地面51，52，53のうちのいずれか１つが略水平面状になって圃場面に略面状に接することとなり、適切な整地作業ができ、よって例えばチェーンケース部７およびブラケット部８の後方にできる圃場の溝や山を適切に均平にできる。   And according to such a farming machine 1, since the extended leveling body 31 has the some ground contact surfaces 51, 52, 53 from which the inclination angle (beta) with respect to a horizontal direction differs in a side view at the time of a deployment work state, Even if the inclination angle α of the leveling body 21 changes according to the tillage depth A, any one of the plurality of ground contact surfaces 51, 52, 53 is substantially horizontal and comes into contact with the farm scene in a substantially planar shape. Thus, appropriate leveling work can be performed, and accordingly, for example, grooves and mountains in the field that can be formed behind the chain case portion 7 and the bracket portion 8 can be appropriately leveled.

また、延長整地体31の当接部41の回動調整によって展開作業状態の延長整地体31の外端下限位置を容易に調整できるため、圃場の土質に適切に対応でき、より一層適切な整地作業ができる。   Moreover, since the lower limit position of the outer end of the extended leveling body 31 in the unfolded working state can be easily adjusted by adjusting the rotation of the contact portion 41 of the extended leveling body 31, it is possible to appropriately cope with the soil quality of the field, and even more appropriate leveling. I can work.

さらに、延長整地体31は整地体21の左右方向端部から斜め前外側方に向って突出する展開作業状態となって整地作業をするため、土が耕耘体11側つまり整地体21側に流動されつつ押し付けられ、隣の作業後の整地面との境界に段がつきにくく、また土量の変化に対しても適切に対応でき、圃場面が波打つようなこともない。   Furthermore, since the extended leveling body 31 is in an unfolding operation state that protrudes diagonally forward and outward from the left and right ends of the leveling body 21, the soil flows to the tillage body 11 side, that is, the leveling body 21 side. However, it is hard to be stepped on the boundary with the ground leveling after the next work, it can appropriately cope with the change of the soil volume, and the field scene does not wave.

なお、延長整地体31は、傾斜角度βが異なる３つの接地面51，52，53を有する構成には限定されず、例えば傾斜角度βが異なる２つの接地面、或いは４つの以上の接地面を有する構成でもよい。   The extended leveling body 31 is not limited to the configuration having the three ground contact surfaces 51, 52, and 53 having different inclination angles β. For example, two ground contact surfaces having different inclination angles β, or four or more contact surfaces are provided. The structure which has may be sufficient.

また、展開作業状態の延長整地体31の外端下限位置が４段階に調整可能なものには限定されず、例えば調整板等の当接部41を有さず、ボルト等で延長整地体31の外端下限位置を無段階に調整できるようにしてもよい。   Further, the lower end position of the extended leveling body 31 in the unfolded working state is not limited to one that can be adjusted in four stages. For example, the extended leveling body 31 does not have the abutting portion 41 such as an adjusting plate, and is extended with a bolt or the like. The outer end lower limit position may be adjusted steplessly.

さらに、機体２の上方カバー部15の後端部に整地体21を設けた構成には限定されず、例えば上方カバー部15の後端部にゴム板を介して整地体21を設けた構成、上方カバー部15の後端部に第１整地体を上下回動可能に設け、この第１整地体の後端部に第２整地体として整地体21を上下回動可能に設けた構成等でもよい。   Furthermore, it is not limited to the structure which provided the leveling body 21 in the rear-end part of the upper cover part 15 of the body 2, For example, the structure which provided the leveling body 21 via the rubber plate in the rear-end part of the upper cover part 15, The first leveling body is provided at the rear end of the upper cover 15 so as to be rotatable up and down, and the leveling body 21 is provided as the second leveling body at the rear end of the first leveling body so as to be rotatable up and down. Good.

本発明の一実施の形態に係る農作業機の平面図である。It is a top view of the agricultural working machine which concerns on one embodiment of this invention. 同上農作業機の側面図である。It is a side view of an agricultural working machine same as the above. 同上農作業機の非作業状態時の図であり、（ａ）が側面図で、（ｂ）が背面図である。It is a figure at the time of the non-working state of an agricultural working machine same as the above, (a) is a side view, (b) is a rear view. 同上農作業機の第１作業状態時の図であり、（ａ）が側面図で、（ｂ）が背面図で、（ｃ）が延長整地体の作業状態を示す斜め前外側方からみた図である。It is a figure at the time of the 1st work state of an agricultural working machine same as the above, (a) is a side view, (b) is a rear view, (c) is the figure seen from the diagonally front outer side which shows the work state of an extended leveling body is there. 同上農作業機の第２作業状態時の図であり、（ａ）が側面図で、（ｂ）が背面図で、（ｃ）が延長整地体の作業状態を示す斜め前外側方からみた図である。It is a figure at the time of the 2nd working state of an agricultural working machine same as the above, (a) is a side view, (b) is a rear view, (c) is the figure seen from the diagonally front outer side which shows the working state of an extended leveling body is there. 同上農作業機の第３作業状態時の図であり、（ａ）が側面図で、（ｂ）が背面図で、（ｃ）が延長整地体の作業状態を示す斜め前外側方からみた図である。It is a figure at the time of the 3rd work state of an agricultural working machine same as the above, (a) is a side view, (b) is a rear view, (c) is the figure seen from the diagonally front outer side which shows the work state of an extended leveling body is there. 同上農作業機の第４作業状態時の図であり、（ａ）が側面図で、（ｂ）が背面図で、（ｃ）が延長整地体の作業状態を示す斜め前外側方からみた図である。It is a figure at the time of the 4th work state of a farm work machine same as the above, (a) is a side view, (b) is a rear view, (c) is the figure seen from the slant front outer side which shows the work state of an extended leveling body is there. 同上農作業機の延長整地体を示す第１の正面図である。It is a 1st front view which shows the extended leveling body of an agricultural working machine same as the above. 同上延長整地体を示す第２の正面図である。It is a 2nd front view which shows an extension leveling body same as the above. 同上延長整地体を示す第３の正面図である。It is a 3rd front view showing an extension leveling machine same as the above. 同上延長整地体を示す第４の正面図である。It is a 4th front view showing an extension leveling machine same as the above.

１ 農作業機
11 耕耘体
21 整地体
30 被当接部
31 延長整地体
33 被取付部
36 本体板部
37 取付板部
41 当接部
43 突部であるピン
44 凹部
51 接地面である第１接地面
52 接地面である第２接地面
53 接地面である第３接地面
Ａ 耕耘体の耕耘深さ
α 整地体の傾斜角度
β 接地面の傾斜角度 1 Agricultural machine
11 Tillage
21 Leveling body
30 Contacted part
31 Extended leveling body
33 Mounted part
36 Main plate
37 Mounting plate
41 Contact part
43 Pin that is a protrusion
44 recess
51 The first ground plane which is the ground plane
52 Second ground plane, which is the ground plane
53 3rd ground contact surface, which is the ground contact surface A Tillage depth of the tillage body α Inclination angle of the leveling body β Inclination angle of the ground contact surface

Claims (5)

所定方向に回転しながら耕耘作業をする耕耘体と、
この耕耘体の後方で水平方向に対して傾斜した前高後低の傾斜姿勢で整地作業をし、前記耕耘体の耕耘深さに応じて傾斜角度が変化する整地体と、
この整地体の左右方向端部に回動可能に設けられ、一方向への回動により前記整地体の左右方向端部から斜め前外側方に向って突出する展開作業状態となり、他方向への回動により前記整地体上に位置する折畳非作業状態となる延長整地体とを備え、
前記整地体の傾斜角度の減少により前記展開作業状態の延長整地体の外端側が前記整地体より下方に位置する構成になっており、
前記延長整地体は、
前記整地体の被取付部に回動可能に取り付けられた取付板部と、
この取付板部に固着され、平面視で内端側から外端側に向って徐々に幅が広がる本体板部とを有し、
前記本体板部は、展開作業状態時において側面視で水平方向に対する傾斜角度が異なる複数の接地面を有し、
圃場の土質に応じて前記展開作業状態の延長整地体の外端下限位置が調整可能である
ことを特徴とする農作業機。 A cultivating body that performs tilling work while rotating in a predetermined direction;
Leveling work in front of the front and rear and the low inclination posture inclined with respect to the horizontal direction behind this tillage body, and a leveling body whose inclination angle changes according to the tillage depth of the tillage body,
The ground leveling body is provided at the left and right end portions so as to be rotatable, and by rotating in one direction, the ground leveling body is in an unfolding operation state projecting obliquely forward and outward from the left and right direction end portions. An extended leveling body that is in a folded non-working state located on the leveling body by rotation,
The outer end side of the extended leveling body in the unfolded work state is configured to be positioned below the leveling body due to a decrease in the inclination angle of the leveling body,
The extended leveling body is:
A mounting plate portion rotatably attached to the mounted portion of the leveling body,
It is fixed to this mounting plate portion, and has a main body plate portion that gradually increases in width from the inner end side toward the outer end side in plan view,
Said body plate portion, have a plurality of ground plane different inclination angles with respect to the horizontal direction as viewed from the side at the time of deployment work state,
A farm working machine characterized in that an outer end lower limit position of the extended leveling body in the unfolded working state can be adjusted according to the soil quality of the farm field . 延長整地体は、展開作業状態時において側面視で水平方向に対する傾斜角度が異なる少なくとも３つの接地面を有する
ことを特徴とする請求項１記載の農作業機。 The agricultural implement according to claim 1, wherein the extended leveling body has at least three ground contact surfaces having different inclination angles with respect to the horizontal direction when viewed from the side when deployed. 整地体の傾斜角度が最大値に設定された状態では、展開作業状態の延長整地体の外端側が前記整地体の下端より上方に位置する
ことを特徴とする請求項１または２記載の農作業機。 3. The agricultural machine according to claim 1, wherein in a state where the inclination angle of the leveling body is set to the maximum value, the outer end side of the extended leveling body in the unfolding operation state is located above the lower end of the leveling body. . 整地体は、左右方向端部に被当接部を有し、
延長整地体は、前記被当接部に当接する回動調整可能な当接部を有し、
前記当接部は、前記延長整地体の取付板部に回動調整可能に取り付けられ、
前記取付板部に対する前記当接部の回動調整により、展開作業状態の延長整地体の外端下限位置が調整可能である
ことを特徴とする請求項１ないし３のいずれか一記載の農作業機。 The leveling body has a contacted portion at the end in the left-right direction,
The extended leveling body has an abutting portion that can rotate and abut against the abutted portion,
The abutting portion is attached to the attachment plate portion of the extended leveling body so as to be capable of being rotated,
The agricultural working machine according to any one of claims 1 to 3, wherein the outer end lower limit position of the extended leveling body in the unfolding work state can be adjusted by adjusting the rotation of the contact portion with respect to the mounting plate portion. . 延長整地体の当接部は、略角板状に形成され、
前記当接部の各辺部には、前記延長整地体の取付板部に突設された突部と係合する凹部が形成されている
ことを特徴とする請求項４記載の農作業機。 The contact part of the extended leveling body is formed in a substantially square plate shape,
The agricultural working machine according to claim 4 , wherein each side portion of the abutting portion is formed with a recess that engages with a protruding portion protruding from a mounting plate portion of the extended leveling body.

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