JP6356296B2 - Tillage leveling machine - Google Patents

Tillage leveling machine Download PDF

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JP6356296B2
JP6356296B2 JP2017052145A JP2017052145A JP6356296B2 JP 6356296 B2 JP6356296 B2 JP 6356296B2 JP 2017052145 A JP2017052145 A JP 2017052145A JP 2017052145 A JP2017052145 A JP 2017052145A JP 6356296 B2 JP6356296 B2 JP 6356296B2
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leveling body
leveling
extended
tillage
rotation amount
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JP2017104138A (en
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佐々木　誠
誠 佐々木
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KOBASHI INDUSTRIES CO., LTD.
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Description

本発明は、耕耘ロータの後方に圃場を整地する整地体を備えた耕耘整地作業機に関する。   The present invention relates to a tillage leveling machine including a leveling body for leveling a farm field behind a tilling rotor.

耕耘整地作業機は、走行機体に装着されて走行機体の走行とともに進行しながら耕耘整地作業を行うものである。この耕耘整地作業機には、回転自在に支持された耕耘ロータと、耕耘ロータの上部を覆う上部カバーの後方側に上下方向に回動自在に設けられた第１の整地体と、第１の整地体の後端部に上下方向に回動自在に設けられた第２の整地体と、第２の整地体の左右方向端部に展開及び格納可能に軸支された延長整地体とを有してなるものが知られている（特許文献１参照）。   The tillage leveling machine is attached to the traveling machine body and performs the tilling work while proceeding with the traveling of the traveling machine body. The tillage leveling machine includes a tiller rotor that is rotatably supported, a first leveling body that is provided on the rear side of an upper cover that covers an upper portion of the tiller rotor, and that is rotatable up and down. There is a second leveling body provided at the rear end of the leveling body so as to be rotatable in the vertical direction, and an extended leveling body pivotally supported at the end in the left-right direction of the second leveling body so that it can be expanded and stored. This is known (see Patent Document 1).

耕耘ロータは、耕耘整地作業機の幅方向両側に配設された伝動ケース及びサポートフレームの下側間に回転可能に支持されている。耕耘ロータは、走行機体からの動力が伝動ケース内に設けられた動力伝達機構を介して伝達されて、回転するようになっている。   The tilling rotor is rotatably supported between the transmission case and the lower side of the support frame disposed on both sides in the width direction of the tillage leveling machine. The power of the tilling rotor is transmitted through a power transmission mechanism provided in the transmission case to rotate.

この耕耘整地作業機の延長整地体は、平面視において展開状態で前端部分が進行方向に対して斜め外側前方へ延びるように傾斜している。このため、耕耘整地作業機の進行時に、第２の整地体の左右方向端部の前方に配置された伝動ケースによって圃場表面が削られて凹んだ溝に対して、圃場の土を寄せることができる。   The extended leveling body of the tillage leveling machine is inclined so that the front end portion extends obliquely outward and forward with respect to the traveling direction in a deployed state in plan view. For this reason, when the tillage leveling machine progresses, the soil of the field may be brought into the groove where the field surface is shaved and dented by the transmission case arranged in front of the left and right ends of the second leveling body. it can.

特開２００７−８２４４２号公報JP 2007-82442 A

この従来の耕耘整地作業機は、速い速度で進行すると、第１の整地体の後端部が浮き上がるように上動する場合がある。第１の整地体の後端部が上動すると、これに回動自在に接続された第２の整地体の前端部も上動して、延長整地体が引っ張り上げられる格好となって、延長整地体の前側が浮いた前高後低状態になる。   When this conventional tillage leveling machine progresses at a high speed, it may move up so that the rear end of the first leveling body is lifted. When the rear end portion of the first leveling body moves up, the front end portion of the second leveling body connected to the first leveling body also moves upward, so that the extended leveling body is pulled up and extended. It becomes low before and after the front side of the leveling body floats.

延長整地体が前高後低状態になると、第２の整地体はその後部が依然として圃場表面に接しているため整地作業をするが、延長整地体はその前部が進行方向斜め前方側へ傾斜して延びるので、延長整地体が前高後低状態になると、その後部は外端側が大きく内端側が小さく圃場表面から浮いてしまう（図５参照）。従って、延長整地体は外端側に向かうほど、整地作業ができなくなって圃場表面の整地機能が低下するという課題が生じる。   When the extended leveling body becomes low after the front height, the second leveling body is leveled because its rear part is still in contact with the field surface, but the front part of the extended leveling body is inclined forward in the direction of travel. Therefore, when the extended leveling body is in a low state after the front height, the rear end is large at the outer end side and small at the inner end side and floats from the field surface (see FIG. 5). Therefore, as the extended leveling body moves toward the outer end side, the leveling work cannot be performed and the leveling function of the field surface is lowered.

本発明は、このような課題を解消するためになされたものであり、延長整地体の前高後低状態時に、圃場表面の整地機能が低下しない延長整地体を有した耕耘整地作業機を提供することを目的とする。   The present invention has been made in order to solve such a problem, and provides a tilling leveling machine having an extended leveling body in which the leveling function of the field surface does not deteriorate when the extended leveling body is in a front high, low and low state. The purpose is to do.

上記目的を達成するために本発明の耕耘整地作業機は、走行機体からの動力を受けて回転動可能に支持された耕耘ロータと、耕耘ロータの上部を覆う上部カバーと、上部カバーの後部に上下方向に回動自在に設けられた第１の整地体と、第１の整地体の後部に上下方向に回動自在に設けられた第２の整地体と、第２の整地体の幅方向端部に、該第２の整地体の進行方向に対して前側が後側より整地体幅方向内側に位置して斜め方向に延びる回動中心軸を中心として上下方向に回動自在に設けられた延長整地体とを備え、延長整地体は、第２の整地体よりも下方に回動可能であることを特徴とする。   In order to achieve the above object, a tillage leveling machine of the present invention is provided with a tilling rotor supported rotatably by a power from a traveling machine body, an upper cover covering an upper portion of the tilling rotor, and a rear portion of the upper cover. A first leveling body provided rotatably in the vertical direction, a second leveling body provided rotatably at the rear part of the first leveling body, and a width direction of the second leveling body At the end, the front side is located inward of the leveling body width direction from the rear side with respect to the traveling direction of the second leveling body, and is provided so as to be rotatable in the vertical direction about a rotation center axis extending obliquely. The extended leveling body is characterized in that the extended leveling body is rotatable downward relative to the second leveling body.

また、本発明の延長整地体には、回動中心軸に対して接近及び離反可能に支持されて第２の整地板の幅方向端部に接触して延長整地体の下方への回動量を調整可能な位置調整部材を有する下方回動量調整機構が設けられていることを特徴とする。   Further, the extended leveling body of the present invention is supported so as to be able to approach and separate from the rotation center axis, and contacts the end in the width direction of the second leveling plate to reduce the amount of downward rotation of the extended leveling body. A downward rotation amount adjustment mechanism having an adjustable position adjustment member is provided.

また、本発明は、下方回動量調整機構の位置調整部材により、延長整地体の後部が該延長整地体の幅方向全体にわたって圃場表面に接地可能であることを特徴とする。   Further, the present invention is characterized in that the rear portion of the extended leveling body can be grounded to the field surface over the entire width direction of the extended leveling body by the position adjusting member of the downward rotation amount adjusting mechanism.

また、本発明の下方回動量調整機構の位置調整部材は、延長整地体の下方への回動量を無段階に調整可能であることを特徴とする。   Further, the position adjusting member of the downward rotation amount adjusting mechanism of the present invention is characterized in that the downward rotation amount of the extended leveling body can be adjusted steplessly.

また、本発明の位置調整部材は、ボルトであることを特徴とする。   The position adjusting member of the present invention is a bolt.

本発明に係わる耕耘整地作業機によれば、上記特徴を有することで、延長整地体が前高後低状態になった場合でも、圃場表面の整地機能が低下しない延長整地体を有した耕耘整地作業機を提供することができる。   According to the tillage leveling machine according to the present invention, by having the above features, the tillage leveling machine having the extended leveling body that does not deteriorate the leveling function of the field surface even when the extended leveling body is in a low state before and after the front leveling. A work machine can be provided.

本発明の第１実施形態に係わる耕耘整地作業機の平面図を示す。The top view of the tillage leveling machine concerning a 1st embodiment of the present invention is shown. 展開時に第２の整地体よりも下方に位置する延長整地体を示し、同図（ａ）は延長整地体の平面図であり、同図（ｂ）は延長整地体の背面図であり、同図（ｃ）は延長整地体の側面図である。The extended leveling body located below the second leveling body during deployment is shown, (a) is a plan view of the extended leveling body, (b) is a rear view of the extended leveling body, Fig. (C) is a side view of the extended leveling body. 格納状態時の延長整地体を示し、同図（ａ）は延長整地体の平面図であり、同図（ｂ）は延長整地体の背面図であり、同図（ｃ）は延長整地体の側面図である。The extended leveling body in the retracted state is shown, in which (a) is a plan view of the extended leveling body, (b) is a rear view of the extended leveling body, and (c) is the extended leveling body. It is a side view. 展開時に第２の整地体と略同一平面上に位置する延長整地体を示し、同図（ａ）は延長整地体の平面図であり、同図（ｂ）は延長整地体の背面図であり、同図（ｃ）は延長整地体の側面図である。The extended leveling body located on the substantially same plane as the second leveling body at the time of unfolding is shown, wherein (a) is a plan view of the extended leveling body and (b) is a rear view of the extended leveling body. FIG. 4C is a side view of the extended leveling body. 前高後低状態になった延長整地体の背面斜視図を示す。The rear perspective view of the extended leveling body which became the low state before front high is shown. 通常の整地姿勢になった延長整地体の背面斜視図を示す。The back perspective view of the extension leveling object used as the normal leveling posture is shown. 本発明の第２実施形態に係わる延長整地体を示し、同図（ａ）は延長整地体の平面図であり、同図（ｂ）は延長整地体の背面図であり、同図（ｃ）は延長整地体の側面図である。The extended leveling body concerning 2nd Embodiment of this invention is shown, The same figure (a) is a top view of an extended leveling body, The figure (b) is a rear view of an extended leveling body, The figure (c). FIG. 3 is a side view of the extended leveling body.

[第１実施形態]
以下、本発明の耕耘整地作業機の好ましい第１の実施の形態を図１〜図６に基づいて説明する。本実施の形態は、耕耘整地作業機のうち代かき用の耕耘整地作業機を例にして以下説明する。なお、説明の都合上、図１（平面図）に示す矢印の方向を前後方向及び左右方向として以下説明する。 [First embodiment]
Hereinafter, a preferred first embodiment of a tillage level working machine of the present invention will be described with reference to FIGS. The present embodiment will be described below by taking, as an example, a plowing tillage leveling machine among the tilling leveling machines. For convenience of explanation, the directions of arrows shown in FIG. 1 (plan view) will be described below as the front-rear direction and the left-right direction.

耕耘整地作業機１は、図１に示すように、走行機体９０の後部に装着されて走行機体９０の走行とともに進行して代かき作業を行うものであり、左右方向に延びる本体フレーム３の両側に配設された伝動ケース５及びサポートフレーム７の下側間に回転動可能に支持された耕耘ロータ９を備える。耕耘ロータ９は、走行機体９０のＰＴＯ軸（図示せず）に接続される入力軸４を介して動力が伝達されて回転するようになっている。   As shown in FIG. 1, the tillage leveling machine 1 is attached to the rear portion of the traveling machine body 90 and proceeds with the traveling of the traveling machine body 90 to perform a substitute work, and is provided on both sides of the main body frame 3 extending in the left-right direction. A tilling rotor 9 is rotatably supported between the disposed transmission case 5 and the lower side of the support frame 7. The tilling rotor 9 is rotated by receiving power through an input shaft 4 connected to a PTO shaft (not shown) of the traveling machine body 90.

耕耘ロータ９の上部にはこの上部を覆う上部カバー１１が設けられている。上部カバー１１は前後方向に延び、その左右両端部に前後方向に延びるカバー側板部１１ａを備えている。上部カバー１１の後部には上下方向に回動自在な第１の整地体１２が設けられ、その後端部には第２の整地体２０が設けられている。第２の整地体２０は板状であり、前端部が第１の整地体１２の後端部に軸支されて後側が上下方向に回動自在であり、本体フレーム３と第２の整地体２０との間に取り付けられた上下位置調整機構１３を介して第２の整地体２０の上下位置調整が可能である。第２の整地体２０の左右両端部には延長整地体３０が展開且つ折畳み自在に設けられている。第２の整地体２０の後端部には、整地作業時に圃場の泥水を作業機の内側へ案内する溝部２０ｂが複数設けられている。   An upper cover 11 is provided on the top of the tilling rotor 9 to cover the top. The upper cover 11 extends in the front-rear direction, and is provided with cover-side plate portions 11a extending in the front-rear direction at both left and right ends thereof. A first leveling body 12 that is rotatable in the vertical direction is provided at the rear part of the upper cover 11, and a second leveling body 20 is provided at the rear end part. The second leveling body 20 is plate-shaped, the front end is pivotally supported by the rear end of the first leveling body 12, and the rear side is rotatable in the vertical direction. The main body frame 3 and the second leveling body It is possible to adjust the vertical position of the second leveling body 20 via the vertical position adjustment mechanism 13 attached between the two. An extended leveling body 30 is provided at both right and left ends of the second leveling body 20 so as to be unfolded and foldable. A plurality of groove portions 20b are provided at the rear end portion of the second leveling body 20 for guiding muddy water in the field to the inside of the work machine during leveling work.

延長整地体３０は、第２の整地体２０の左右両端部の上面に取り付けられた固定部材２１に回動自在に挿着された回動中心軸２３に取り付けられた支枠３１と、支枠３１の先端部に固着された均平板３３と、均平板３３を上方及び下方に付勢する引っ張りばね３５（図２（ａ）参照）とを有して構成される。   The extended leveling body 30 includes a support frame 31 attached to a rotation center shaft 23 rotatably attached to a fixing member 21 attached to the upper surfaces of the left and right ends of the second leveling body 20, and a support frame. A flat plate 33 fixed to the tip of 31 and a tension spring 35 (see FIG. 2A) for urging the flat plate 33 upward and downward.

支枠３１は、図２（ａ）を更に追加して説明すると、前後方向に所定間隔を有して対向配置された一対の支持板３１ａ，３１ｂと、一対の支持板３１ａ，３１ｂ間を繋ぐ連結板３１ｃとを有して構成される。一対の支持板３１ａ，３１ｂは、均平板３３の表面の基端側（第２の整地体２０側）の端部上に配設されて第２の整地体２０側へ延びる。一対の支持板３１ａ，３１ｂの基端側の各端部は、前述した回動中心軸２３に軸支されている。   The support frame 31 will be further described with reference to FIG. 2 (a). The support frame 31 connects the pair of support plates 31a and 31b and the pair of support plates 31a and 31b, which are opposed to each other with a predetermined interval in the front-rear direction. And a connecting plate 31c. The pair of support plates 31a and 31b are disposed on the base end side (second leveling body 20 side) end of the surface of the leveling plate 33 and extend to the second leveling body 20 side. The respective end portions on the base end side of the pair of support plates 31a and 31b are pivotally supported on the rotation center shaft 23 described above.

一対の支持板３１ａ，３１ｂの先端側（第２の整地体２０から離反する側）は、均平板３３の内面に溶接等によって固着されている。このため、延長整地体３０は回動中心軸２３を中心として上下方向に回動して、第２の整地体２０から左右方向外側へ延びる整地姿勢Ｐｓ（図２（ｂ）、図２（ｃ）参照）と、第２の整地体２０上に重ね合わされて第２の整地体２０に対して斜め上方へ延びる格納姿勢Ｐｋ（図３（ａ）、図３（ｂ）、図３（ｃ）参照）との間を移動可能である。   The tip ends of the pair of support plates 31a and 31b (sides away from the second leveling body 20) are fixed to the inner surface of the leveling plate 33 by welding or the like. For this reason, the extended leveling body 30 rotates in the vertical direction about the rotation center axis 23, and the leveling posture Ps (FIGS. 2B and 2C) extends outward from the second leveling body 20 in the left-right direction. )) And a retracted posture Pk that is superimposed on the second leveling body 20 and extends obliquely upward with respect to the second leveling body 20 (FIGS. 3A, 3B, and 3C). To see).

回動中心軸２３は、第２の整地体２０の進行方向に対して前側が後側より左右方向内側に位置するとともに、延長整地体３０が第２の整地体２０上に第２の整地体２０に沿って格納されるように、延長整地体３０が折り畳まれる中心軸線となる折畳み線Ｌが傾斜角度αを有して傾いている。このため、延長整地体３０による整地作業時の側方への泥土のはみ出しを少なくすることができると共に、延長整地体３０が第１の整地体１２やカバー側板部１１ａに接触することなく延長整地体３０を第２の整地体２０上に格納することができ、且つ延長整地体３０を作業機の内側にコンパクトに納めることができる。このため、第２の整地体２０上への格納時に延長整地体３０が作業機外側に突出する部分が少なくなり、移動時に延長整地体３０が障害物等に当接して損傷する事態を未然に防止することができる。   The rotation center axis 23 is located on the inner side in the left-right direction with respect to the traveling direction of the second leveling body 20, and the extended leveling body 30 is placed on the second leveling body 20 on the second leveling body 20. As shown in FIG. 20, the folding line L that is the central axis of the extended leveling body 30 is tilted with an inclination angle α. For this reason, while being able to reduce the protrusion of the mud to the side at the time of leveling by the extended leveling body 30, the extended leveling body 30 does not contact the first leveling body 12 or the cover side plate portion 11a. The body 30 can be stored on the second leveling body 20, and the extended leveling body 30 can be stored compactly inside the working machine. For this reason, when the extended leveling body 30 is stored on the second leveling body 20, a portion where the extended leveling body 30 protrudes to the outside of the work machine is reduced, and the extended leveling body 30 is in contact with an obstacle or the like during the movement and is damaged. Can be prevented.

連結板３１ｃの表面の略中央部には、ゴム製のストッパ３２が設けられている。ストッパ３２は、円盤状に形成されて連結板３１ｃの表面に突出して設けられている。このストッパ３２は、延長整地体３０が第２の整地体２０上に折畳まれて格納される際に、ストッパ３２が第２の整地体２０に接触して、延長整地体３０や第２の整地体２０への衝撃を緩和する（図３（ｂ）参照）。   A rubber stopper 32 is provided at a substantially central portion of the surface of the connecting plate 31c. The stopper 32 is formed in a disc shape and is provided so as to protrude from the surface of the connecting plate 31c. When the extended leveling body 30 is folded and stored on the second leveling body 20, the stopper 32 comes into contact with the second leveling body 20 so that the extended leveling body 30 or the second leveling body 30 is The impact on the leveling body 20 is reduced (see FIG. 3B).

均平板３３の前側には上方に曲げ起こされた誘導片３３ａが形成されており、誘導片３３ａの基端部に繋がる均平板３３の接地線Ｌｓは、第２の整地体２０の左右方向に対して外側が内側より前方に突出して傾斜するように構成されている。このように、延長整地体３０は、整地姿勢Ｐｓになると、誘導片３３ａの外側が内側より前方に突出して斜め方向に延びるので、伝動ケース５により削られた土塊や泥土を整地体幅方向内側に寄せながら伝動ケース５により削られた溝を埋めて、耕土表面を均平にすることができる。均平板３３の後端部には、整地作業時に圃場の泥水を作業機の内側へ案内する溝部３３ｂが複数設けられている。   A guiding piece 33 a bent upward is formed on the front side of the leveling plate 33, and the ground line Ls of the leveling plate 33 connected to the base end portion of the guiding piece 33 a extends in the left-right direction of the second leveling body 20. On the other hand, the outer side protrudes forward from the inner side and is inclined. As described above, when the extended leveling body 30 is in the leveling position Ps, the outer side of the guide piece 33a protrudes forward from the inner side and extends in the oblique direction, so the lump or mud cut by the transmission case 5 The groove cut by the transmission case 5 can be filled while the surface of the cultivated soil is leveled. A plurality of grooves 33b are provided at the rear end of the leveling plate 33 to guide the muddy water in the field to the inside of the work machine during leveling work.

引っ張りばね３５は、第２の整地板２０の左右方向両端の進行方向後端部と支枠３１の支持板３１ｂの後部との間に取り付けられている。この引っ張りばね３５は、延長整地体３０が格納姿勢Ｐｋ（図３（ｂ）参照）に移動すると、縮小状態となり、延長整地体３０が格納姿勢Ｐｋから整地姿勢Ｐｓ（図２（ｂ）参照）側への回動角度が増加すると、それに伴って引っ張りばね３５の伸びは増大する。延長整地体３０の回動角度が所定角度（例えば、約９０°）になると、引っ張りばね３５の伸びは最大となり、回動角度が所定角度を超えると、引っ張りばね３５の伸びは漸次小さくなるように設けられている。   The tension spring 35 is attached between the rear end portion in the traveling direction at both left and right ends of the second leveling plate 20 and the rear portion of the support plate 31 b of the support frame 31. When the extended leveling body 30 moves to the retracted position Pk (see FIG. 3B), the tension spring 35 is in a contracted state, and the extended leveling body 30 changes from the stored position Pk to the leveling position Ps (see FIG. 2B). As the turning angle to the side increases, the extension of the tension spring 35 increases accordingly. When the rotation angle of the extended leveling body 30 reaches a predetermined angle (for example, about 90 °), the extension of the tension spring 35 becomes maximum, and when the rotation angle exceeds the predetermined angle, the extension of the tension spring 35 gradually decreases. Is provided.

引っ張りばね３５は、延長整地体３０が格納姿勢Ｐｋ及び整地姿勢Ｐｓになると、引っ張りばね３５の附勢力によって延長整地体３０を格納姿勢Ｐｋ及び整地姿勢Ｐｓに維持させる。なお、延長整地体３０が整地姿勢Ｐｓの位置にあるときの引っ張りばね３５の力の大きさの詳細については後述する。   The tension spring 35 maintains the extended leveling body 30 in the retracted position Pk and the leveled attitude Ps by the urging force of the tension spring 35 when the extended leveling body 30 reaches the retracted position Pk and the leveled position Ps. The details of the magnitude of the force of the tension spring 35 when the extended leveling body 30 is at the leveling position Ps will be described later.

延長整地体３０の右側端部には、第２の整地体２０に対する延長整地体３０の下方への回動量を調整可能な下方回動量調整機構４０が設けられている。下方回動量調整機構４０は、図２（ａ）、図２（ｂ）、図２（ｃ）及び図４（ａ）に示すように、延長整地体３０の上面上に固着された支持枠４１と、支持枠４１に対して左右方向に位置調整自在に設けられたボルト４５及びナット４７，４８とを有してなる。   A downward rotation amount adjustment mechanism 40 capable of adjusting the downward rotation amount of the extended leveling body 30 relative to the second leveling body 20 is provided at the right end of the extended leveling body 30. As shown in FIGS. 2A, 2 </ b> B, 2 </ b> C, and 4 </ b> A, the downward rotation amount adjusting mechanism 40 includes a support frame 41 fixed on the upper surface of the extended leveling body 30. And bolts 45 and nuts 47 and 48 provided so as to be adjustable in position in the left-right direction with respect to the support frame 41.

支持枠４１は、第２の整地体２０の左右方向に沿って延びて前後方向に所定間隔を有して配置された一対の支持枠側部４１ａと、支持枠側部４１ａの第２の整地体２０側の端部間を繋ぐ支持枠頂部４１ｂとを有してなる。支持枠頂部４１ｂは、第２の整地体２０の左側端部に設けられて前後方向に延びる整地体側部２０ａと略平行になるように配置されている。支持枠頂部４１ｂの略中央部にはボルト４５の軸部４５ｂを挿通可能な孔部が設けられている。   The support frame 41 extends along the left-right direction of the second leveling body 20 and is arranged with a predetermined interval in the front-rear direction, and a second leveling of the support frame side part 41a. It has a support frame top 41b that connects the ends on the body 20 side. The support frame top portion 41b is disposed so as to be substantially parallel to the leveling body side portion 20a provided at the left end portion of the second leveling body 20 and extending in the front-rear direction. A hole portion through which the shaft portion 45b of the bolt 45 can be inserted is provided at a substantially central portion of the support frame top portion 41b.

ボルト４５は、軸部４５ｂと軸部４５ｂの軸方向一端部に形成された頭部４５ａとを有してなる。軸部４５ｂには、その一端部から他端部に亘って雄ねじが形成されている。ボルト４５は、軸部４５ｂに第１のナット４７を予め螺合させた状態で、第１のナット４７から延出する軸部４５ｂを孔部の第２の整地板側から挿入し、孔部から延出する軸部４５ｂに第２のナット４８を螺合して、支持枠４１に装着される。   The bolt 45 includes a shaft portion 45b and a head portion 45a formed at one axial end portion of the shaft portion 45b. The shaft portion 45b is formed with a male screw extending from one end portion to the other end portion. The bolt 45 is inserted with the shaft portion 45b extending from the first nut 47 from the second leveling plate side of the hole portion in a state where the first nut 47 is screwed into the shaft portion 45b in advance. The second nut 48 is screwed into the shaft portion 45 b extending from the shaft 45 b and is attached to the support frame 41.

ボルト４５は、第１のナット４７及び第２のナット４８が互いに接近する方向に回動させることで、これらのナット間に支持枠頂部４１ｂが挟持された状態となって、支持枠４１に固定される。また、ボルト４５は、軸部４５ｂに対する第１のナット４７及び第２のナット４８の螺合位置を調整することで、支持枠４１に対するボルト４５の頭部４５ａの位置を第２の整地体２０の整地体側部２０ａに対して接近及び離反する位置に無段階に位置調整することができる。   The bolt 45 is fixed to the support frame 41 by rotating the first nut 47 and the second nut 48 in a direction in which they approach each other so that the support frame top 41b is sandwiched between these nuts. Is done. Moreover, the bolt 45 adjusts the screwing position of the 1st nut 47 and the 2nd nut 48 with respect to the axial part 45b, The position of the head 45a of the bolt 45 with respect to the support frame 41 is set to the 2nd leveling body 20. It is possible to adjust the position steplessly to a position that approaches and separates from the leveling body side portion 20a.

このため、支持枠４１の支持枠頂部４１ｂに対してボルト４５の頭部４５ａの先端までの距離をＬ１とした場合、図４（ａ）、図４（ｂ）、図４（ｃ）に示すように、ボルト４５の頭部４５ａの先端部が整地体側部２０ａに接触して延長整地体３０の下方への回動が規制されて、延長整地体３０を第２の整地体２０と略同一平面上に位置させることができる（図４（ｂ）参照）。   For this reason, when the distance to the front-end | tip of the head 45a of the volt | bolt 45 with respect to the support frame top part 41b of the support frame 41 is set to L1, it shows to Fig.4 (a), FIG.4 (b), FIG.4 (c). As described above, the tip of the head portion 45a of the bolt 45 comes into contact with the leveling body side 20a and the downward movement of the extended leveling body 30 is restricted, so that the extended leveling body 30 is substantially the same as the second leveling body 20. It can be located on a plane (see FIG. 4B).

また、支持枠４１の支持枠頂部４１ｂに対してボルト４５の頭部４５ａの先端までの距離をＬ１より小さいＬ２（Ｌ２＜Ｌ１）とした場合、図２（ａ）、図２（ｂ）、図２（ｃ）に示すように、ボルト４５の頭部４５ａの先端部が整地体側部２０ａに接触するまで延長整地体３０が下方へ回動することで、延長整地体３０を第２の整地体２０よりも下方に位置させることができる（図２（ｂ）参照）。   When the distance from the support frame top 41b of the support frame 41 to the tip of the head 45a of the bolt 45 is L2 smaller than L1 (L2 <L1), FIG. 2 (a), FIG. 2 (b), As shown in FIG. 2 (c), the extended leveling body 30 rotates downward until the tip of the head 45a of the bolt 45 contacts the leveling body side part 20a. It can be located below the body 20 (see FIG. 2B).

このため、耕耘整地作業機１の進行速度が速くなった場合、第１の整地体１２（図１参照）の後端部が浮き上がるように上動するに伴って第２の整地体２０の前端部が上動すると、延長整地体３０が回動中心軸２３を介して引っ張り上げられた格好になる（図５参照）。延長整地体３０の前方が引っ張り上げられた格好になると、延長整地体３０の前側が浮いた前高後低状態になり、図５に示すように、延長整地体３０の後部に略三角形状の斜線で示した未接地部分Ｐｍができることになり、延長整地体３０はその整地機能が低下若しくはなくなってしまうが、延長整地体３０は第２の整地体２０よりも下方へ回動可能であるので、延長整地体３０は前述した引っ張りばね３５による附勢力と自重とによって下方へ回動して、延長整地体３０の後部を延長整地体３０の幅方向（左右方向）全体にわたって圃場表面に接地させた状態（図６参照）にすることができ、その整地機能を発揮させることができる。   For this reason, when the traveling speed of the tilling leveling machine 1 increases, the front end of the second leveling body 20 as the rear end of the first leveling body 12 (see FIG. 1) moves up so as to rise. When the part moves up, the extended leveling body 30 is pulled up via the rotation center shaft 23 (see FIG. 5). When the front of the extended leveling body 30 is pulled up, the front side of the extended leveling body 30 is in a low state before and after being lifted, and as shown in FIG. An ungrounded portion Pm indicated by oblique lines is formed, and the leveling function of the extended leveling body 30 is reduced or eliminated, but the extended leveling body 30 can be rotated downward relative to the second leveling body 20. The extended leveling body 30 is rotated downward by the urging force and the own weight of the tension spring 35 described above, and the rear part of the extended leveling body 30 is grounded to the field surface over the entire width direction (left-right direction) of the extended leveling body 30. (See FIG. 6), and the leveling function can be exhibited.

そして、延長整地体３０の溝部３３ｂによって、圃場の泥土を整地体幅方向内側に寄せて伝動ケース５により削られた溝に埋めることができ、耕土表面を均平にすることができる。   And the muddy soil of a farm field can be approached to the leveling body width direction inside by the groove part 33b of the extension leveling body 30, and it can be buried in the groove | channel cut by the transmission case 5, and the cultivated soil surface can be leveled.

なお、耕耘整地作業機１の進行速度が遅くなるなどして、延長整地体３０が前高後低状態から水平姿勢（図４（ｂ）参照）になろうとすると、延長整地体３０は、前述した引っ張りばね３５の附勢力に抗して通常の整地姿勢に維持される。ここで、延長整地体３０が通常の整地姿勢にあるときの引っ張りばね３５の附勢力の大きさは、圃場の泥土が柔らかい場合でも、延長整地体３０の先端部が圃場の泥土内に食い込むことがない程度の大きさを有している。このため、延長整地体３０の整地作業時に延長整地体３０の先端部によりが耕土表面にすじが形成される等の不都合が生じる虞はない。   In addition, if the traveling speed of the tillage leveling work machine 1 is slowed or the like, and the extended leveling body 30 tries to be in a horizontal posture (see FIG. 4B) from the front height and the low level, the extended leveling body 30 is The normal leveling posture is maintained against the biasing force of the tension spring 35. Here, the magnitude of the urging force of the tension spring 35 when the extended leveling body 30 is in a normal leveling posture is that the tip of the extended leveling body 30 bites into the mud of the field even when the mud of the field is soft. There is no size. For this reason, there is no possibility that inconveniences such as a streak being formed on the surface of the cultivated soil by the tip of the extended leveling body 30 during the leveling work of the extended leveling body 30 will not occur.

[第２実施形態]
次に、耕耘整地作業機の第２実施形態について図７を参照しながら説明する。第２実施形態については、前述した第１実施形態との相違点のみを説明し、第１実施形態と同一態様部分については同一符号を附して説明を省略する。 [Second Embodiment]
Next, a second embodiment of the tillage leveling machine will be described with reference to FIG. In the second embodiment, only differences from the first embodiment described above will be described, and the same reference numerals will be given to the same aspects as those in the first embodiment, and description thereof will be omitted.

支枠３１'は、図７（ａ）、図７（ｂ）、図７（ｃ）に示すように、前後方向に所定間隔を有して対向配置された一対の支持板３１ａ，３１ｂを有してなる。つまり、この支枠３１'には、前述した連結板３１ｃ及びストッパ３２（図２（ａ）参照）が省略されている。このように、支枠３１'には連結板３１ｃ及びストッパ３２が省略されていることで、支枠３１'の構造が簡素化されて、下方回動量調整機構のコストを安価にすることができる。   As shown in FIGS. 7 (a), 7 (b), and 7 (c), the support frame 31 'has a pair of support plates 31a and 31b that are arranged to face each other with a predetermined interval in the front-rear direction. Do it. That is, the connecting plate 31c and the stopper 32 (see FIG. 2A) are omitted from the support frame 31 ′. As described above, the connection plate 31c and the stopper 32 are omitted from the support frame 31 ′, thereby simplifying the structure of the support frame 31 ′ and reducing the cost of the downward rotation amount adjusting mechanism. .

また、前述した実施例では、代かき用の耕耘整地作業機１を例にして説明したが、前述した延長整地体３０を耕耘・砕土用の耕耘整地作業機に取り付けてもよい。耕耘・砕土用の耕耘整地作業機（図示せず）は、耕耘ロータ９の上部を覆う上部カバー１１の後部に整地体を上下回動自在に設け、この整地体の左右方向端部に前述した延長整地体３０を取り付けて構成する。このように延長整地体３０を設けることにより、前述した代かき用の耕耘整地作業機１と同様の効果、即ち、耕耘整地作業機１の進行速度が速くなった場合でも、延長整地体３０の後部を延長整地体３０の幅方向（左右方向）全体にわたって圃場表面に接地させた状態にすることができ、圃場表面を整地する整地機能を発揮させることができるという効果を得ることができる。   In the above-described embodiment, the plowing tillage leveling machine 1 has been described as an example, but the above-described extended leveling body 30 may be attached to the tilling / crushing leveling machine. The tillage leveling machine (not shown) for tillage and crushed soil is provided with a leveling body at the rear part of the upper cover 11 covering the upper part of the tilling rotor 9 so as to be rotatable up and down. The extended leveling body 30 is attached and configured. By providing the extended leveling body 30 as described above, even if the same effect as that of the above-described tillage leveling work machine 1, that is, when the traveling speed of the tilling leveling machine 1 is increased, the rear part of the extended leveling body 30 is obtained. Can be brought into contact with the surface of the field over the entire width direction (left-right direction) of the extended leveling body 30, and the leveling function of leveling the field surface can be exhibited.

１ 耕耘整地作業機
９ 耕耘ロータ
１１ 上部カバー
１２ 第１の整地体
２０ 第２の整地体
２３ 回動中心軸
３０ 延長整地体
４０ 下方回動量調整機構
４５ ボルト（位置調整部材）
９０ 走行機体 DESCRIPTION OF SYMBOLS 1 Tillage leveling machine 9 Tillage rotor 11 Upper cover 12 1st leveling body 20 2nd leveling body 23 Turning center axis 30 Extension leveling body 40 Downward rotation amount adjustment mechanism 45 Bolt (position adjustment member)
90 traveling aircraft

Claims (5)

走行機体からの動力を受けて回転可能に支持された耕耘ロータと、
前記耕耘ロータの上部を覆う上部カバーと、
前記上部カバーの後部に上下方向に回動自在に設けられた整地体と、
前記整地体の幅方向端部に、該整地体の進行方向に対して前側が後側より整地体幅方向内側に位置して斜め方向に延びる回動中心軸を中心として上下方向に回動自在に設けられた延長整地体と、
前記延長整地体の回動量を調整可能な回動量調整機構と、
を備え、
前記回動量調整機構は、前記回動中心軸に対して接近及び離反可能に支持されて前記整地体の幅方向端部に接触して前記延長整地体の回動量を調整可能な位置調整部材を有する、耕耘整地作業機。 A tilling rotor supported rotatably by receiving power from the traveling machine body;
An upper cover that covers the top of the tillage rotor;
A leveling body provided at the rear of the upper cover so as to be rotatable in the vertical direction;
At the end of the leveling body in the width direction , the front side with respect to the traveling direction of the leveling body is located on the inside of the leveling body width direction from the rear side , and is rotatable up and down around a rotation center axis extending in an oblique direction. An extended leveling body provided in
A rotation amount adjusting mechanism capable of adjusting a rotation amount of the extended leveling body;
With
The rotation amount adjustment mechanism includes a position adjustment member that is supported so as to be able to approach and move away from the rotation center axis and that can contact the end in the width direction of the leveling body to adjust the rotation amount of the extended leveling body. Has a tillage leveling machine. 前記位置調整部材は、ボルトである、請求項１に記載の耕耘整地作業機。   The tillage leveling machine according to claim 1, wherein the position adjusting member is a bolt. 前記回動量調整機構は、前記ボルトの軸部に対するナットの螺合位置を調整することにより、前記延長整地体の回動量を調整可能である、請求項２に記載の耕耘整地作業機。   The tillage leveling machine according to claim 2, wherein the rotation amount adjusting mechanism is capable of adjusting a rotation amount of the extended leveling body by adjusting a screwing position of a nut with respect to a shaft portion of the bolt. 前記回動量調整機構は、前記延長整地体の上面に固着された支持枠を有し、
前記ボルトは、前記支持枠の頂部に設けられた孔部に挿入されるとともに、２つの前記ナットで前記支持枠の頂部を挟持することで前記支持枠に固定される、請求項３に記載の耕耘整地作業機。 The rotation amount adjustment mechanism has a support frame fixed to the upper surface of the extended leveling body,
The bolt, while being inserted into the hole provided in the top portion of the support frame is fixed to the support frame by sandwiching the top portion of the support frame by two of the nut, according to claim 3 Tillage leveling machine. 前記回動量調整機構は、前記延長整地体の回動量を無段階に調整可能である、請求項１乃至４のいずれか１項に記載の耕耘整地作業機。
The tillage leveling machine according to any one of claims 1 to 4, wherein the rotation amount adjustment mechanism can adjust the rotation amount of the extended leveling body steplessly.
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JP4537216B2 (en) * 2005-01-27 2010-09-01 小橋工業株式会社 Rotary tillage device
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