JP5643715B2

JP5643715B2 - Rotary tillage device

Info

Publication number: JP5643715B2
Application number: JP2011122315A
Authority: JP
Inventors: 茜吉野; 貞雄山中; 賢打谷; 剛渡; 伸治前田; 俊平大塚
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2011-05-31
Filing date: 2011-05-31
Publication date: 2014-12-17
Anticipated expiration: 2031-05-31
Also published as: JP2012249533A

Description

本発明は、圃場の畝立て作業と均平作業を行うロータリ耕耘装置に関する。 The present invention relates to a rotary tiller that performs uprighting work and leveling work in a field.

従来のロータリ耕耘装置として、可撓性を有する平板（ゴムマット等）の下辺部の横方向中央部を抵抗棒に連結することによって畝立てを実施することができ、また平板の下辺部の横方向中央部と抵抗棒との連結を解除すると、平板の全体が後方に移動可能となって、均平作業を実施することができるものが知られている。 As a conventional rotary tiller, it is possible to carry out vertical setting by connecting the horizontal center of the lower side of a flexible flat plate (rubber mat, etc.) to a resistance bar, and the horizontal direction of the lower side of the flat plate. When the connection between the central portion and the resistance rod is released, the entire flat plate can be moved rearward and a leveling operation can be performed.

このようなロータリ耕耘装置によれば、通常の均平作業を実施できるだけでなく、畝が形成された圃場において、平板の下辺部の横方向中央部と抵抗棒との連結を解除した状態で再び均平作業を実施すると、平板の一方及び他方の横側部が、畝の壁部に沿うように斜めに後方に折れ曲がる状態となるため、形成した畝を崩さずに畝間に生えた草の除草等を行うことができる（特許文献１参照）。 According to such a rotary tiller, not only can the normal leveling work be performed, but also in the field where the ridges are formed, the connection between the lateral center of the lower side of the flat plate and the resistance bar is again performed. When leveling work is performed, one side and the other side of the flat plate bend diagonally backward along the wall of the reed, so weeding the grass that has grown between the reeds without breaking the reed Etc. can be performed (see Patent Document 1).

特開２００９−２２５７３１号公報JP 2009-225731 A

しかしながら、前記平板は可撓性を有するため、均平作業時に部分的に弾性変形して圃場の表面にわずかではあるが比較的大きな凹凸が形成される場合があった。
従って、均平作業において圃場の表面をもっとより平らで滑らかにするためには、平板を取り外して、弾性変形し難い硬質の整地板（板金製等）に交換しなければならないという煩わしさがあった。 However, since the flat plate has flexibility, there are cases where a relatively large unevenness is formed on the surface of the field due to partial elastic deformation during the leveling operation.
Therefore, in order to make the field surface even and smoother in leveling work, there is the trouble of removing the flat plate and replacing it with a hard leveling plate (such as a sheet metal) that is difficult to elastically deform. It was.

本発明の目的は、均平作業を行う際の平板の交換作業を行う必要のないロータリ耕耘装置を提供することにある。 An object of the present invention is to provide a rotary tiller that does not require a flat plate replacement operation when performing a leveling operation.

本発明のロータリ耕耘装置の第１特徴構成は、
可撓性を有し、且つその上端部が耕耘爪の上方を覆うカバーの後端部に設けたヒンジ部材を介して前記カバーに連結され、前記カバーに対して上下揺動可能に支持されている平板と、
前記平板の後方に配置され、且つその上端部が前記ヒンジ部材を介して前記カバーに連結され、前記カバーに対して上下揺動可能に支持されている硬質の整地板と、
前記整地板を前記平板から後方又は上方に離れた姿勢に解除自在に保持する保持手段とを備え、
前記平板と前記整地板とを解除自在に接続する接続手段を、前記ヒンジ部材から離れた位置において前記平板と前記整地板とに亘って設けてある点にある。 The first characteristic configuration of the rotary tiller of the present invention is:
It has flexibility and its upper end is connected to the cover via a hinge member provided at the rear end of the cover that covers the top of the tilling nail , and is supported so as to be swingable up and down with respect to the cover. A flat plate,
A hard leveling plate disposed behind the flat plate and having an upper end connected to the cover via the hinge member and supported so as to swing up and down with respect to the cover ;
And a holding means for releasably holding the front Symbol leveling plate position spaced rearward or upward from the flat plate,
Connection means for releasably connecting the flat plate and the leveling plate is provided across the flat plate and the leveling plate at a position away from the hinge member .

〔作用及び効果〕
本構成のごとく、硬質の整地板が平板の後方に配置され、平板及び整地板がカバーの後端部分を支点として上下に揺動可能であれば、整地板を下方に揺動させてカバーの後端部分から垂れ下がる姿勢とし、平板と整地板とを接続することによって、平板と整地板とが一体となった状態で後方に移動可能となり、均平作業を実施することができる。 [Action and effect]
As in this configuration, if the hard leveling plate is placed behind the flat plate and the flat plate and leveling plate can swing up and down with the rear end of the cover as a fulcrum, the leveling plate is swung downward to By adopting a posture that hangs down from the rear end portion and connecting the flat plate and the leveling plate, the flat plate and the leveling plate can be moved backward in an integrated state, and leveling work can be performed.

このとき、硬質の整地板が平板の後方に配置されるため、整地板によって圃場が均平にならされ、大きな凹凸がほとんどない平らで滑らかな圃場表面を形成することができる。従って、本構成によれば、均平作業を実施する際に、平板の交換作業を行う必要がなく作業性が良い。 At this time, since the hard leveling plate is arranged behind the flat plate, the field is leveled by the leveling plate, and a flat and smooth field surface with almost no large unevenness can be formed. Therefore, according to this configuration, when performing the leveling work, it is not necessary to perform the work of replacing the flat plate, and the workability is good.

また本構成によれば、耕耘爪によって跳ね上げられた耕耘土が前方の平板に当たり易く、後方の整地板には当たり難いため、平板に耕耘土が当たった場合、平板が少し弾性変形して、耕耘土が平板に付着し難い。 In addition, according to this configuration, the cultivated soil that has been flipped up by the cultivating claws is easy to hit the front flat plate, and is difficult to hit the rear leveling plate, so when the flat soil hits the flat plate, the flat plate is slightly elastically deformed, Tillage soil is difficult to adhere to the flat plate.

さらに、本構成のごとく、整地板を平板から後方又は上方に離れた姿勢に保持可能な手段を備えるものであれば、整地板を平板から後方又は上方に離れた姿勢に保持することによって、畝が形成された圃場において均平作業を実施すると、平板の一方及び他方の横側部が、畝の壁部に沿うように斜めに後方に折れ曲がる状態となるため、形成した畝を崩さずに畝間に生えた草の除草等を行うことができる。 Furthermore, as in this configuration, if the ground leveling plate is provided with a means capable of holding the leveling plate in a posture separated backward or upward from the flat plate, by holding the leveling plate in a posture separated backward or upward from the flat plate, If the flattening operation is performed in the field where the slab is formed, one side and the other side of the flat plate bend diagonally backward along the wall of the cocoon. Weeding of grass that grows on can be performed.

また、平板と整地板との接続によって、平板と整地板とを一緒に持ち上げることができるため、ロータリ耕耘装置の内部のメンテナンスを容易に実施することができる。 Moreover, since a flat plate and a leveling board can be lifted together by the connection of a flat plate and a leveling board, the maintenance inside a rotary tillage apparatus can be implemented easily.

第２特徴構成は、
可撓性を有し、且つその上端部が耕耘爪の上方を覆うカバーの後端部に上下揺動可能に連結されている平板と、
前記平板の後方に配置され、前記カバーの後端部に上下揺動可能に連結されている硬質の整地板と、
前記平板と前記整地板とを解除自在に接続する接続手段と、
前記整地板を前記平板から後方又は上方に離れた姿勢に解除自在に保持する保持手段とを備え、
前記接続手段が、前記平板の横方向中央部及び前記整地板の横方向中央部のいずれか一方に設けた挟持部材と、前記平板の横方向中央部及び前記整地板の横方向中央部の他方に設けた被挟持部材とを備え、前記挟持部材が前記被挟持部材に挟持されることにより前記平板と前記整地板とが接続されるように構成してある点にある。 The second feature configuration is
A flat plate that is flexible and has an upper end connected to a rear end of a cover that covers the top of the tilling nail so as to swing up and down;
A hard leveling plate disposed behind the flat plate and connected to the rear end of the cover so as to swing up and down;
Connection means for releasably connecting the flat plate and the leveling plate;
Holding means for releasably holding the leveling plate in a posture separated rearward or upward from the flat plate,
The connecting means is a clamping member provided at one of the horizontal center of the flat plate and the horizontal central of the leveling plate, and the other of the horizontal central portion of the flat plate and the horizontal central portion of the leveling plate And the flat plate and the leveling plate are connected to each other when the clamping member is clamped by the clamped member.

〔作用及び効果〕
本構成によれば、接続手段が、平板の横方向中央部及び整地板の横方向中央部のいずれか一方に設けた挟持部材と、平板の横方向中央部及び整地板の横方向中央部の他方に設けた被挟持部材という簡素な構成でなるものであるため、故障等が発生し難く、低コスト化も図れる。 [Action and effect]
According to this configuration, the connecting means includes a sandwiching member provided in one of the horizontal central portion of the flat plate and the horizontal central portion of the leveling plate, the horizontal central portion of the flat plate, and the horizontal central portion of the leveling plate. Since it has a simple configuration of a sandwiched member provided on the other side, failure or the like is unlikely to occur, and cost can be reduced.

第３特徴構成は、前記平板の右端及び左端のそれぞれの上部に、小径孔部と大径孔部とが連なったダルマ孔を、前記ダルマ孔の小径孔部が前記平板の横方向中央部側に配置されるように設け、前記整地板の右端及び左端のそれぞれの上部に頭付きピンを立設し、前記頭付きピンの頭部を、前記ダルマ孔の大径孔部から挿入して、前記ダルマ孔の小径孔部に係止させることにより、前記平板の右端及び左端のそれぞれの上部が、前記整地板の右端及び左端のそれぞれの上部に固定される点にある。 In the third characteristic configuration, a dharma hole in which a small diameter hole portion and a large diameter hole portion are connected to each upper portion of the right end and the left end of the flat plate. Provided with a headed pin standing on each of the right and left ends of the leveling plate, and inserting the head of the headed pin from the large-diameter hole of the Dharma hole, The upper portions of the right end and the left end of the flat plate are fixed to the upper portions of the right end and the left end of the leveling plate by being engaged with the small-diameter hole portion of the Dharma hole, respectively.

〔作用及び効果〕
本構成によれば、接続手段の他に、平板に設けたダルマ孔と、整地板に設けた頭付きピンとの係止によって平板と整地板とが接続されるため、平板と整地板とがより強固に接続される。また、平板の端部がめくれて平板と整地板との間に耕耘土が入り込むようなことが少ない。 [Action and effect]
According to this configuration, in addition to the connection means, the flat plate and the leveling plate are connected by the locking of the dharma hole provided in the flat plate and the headed pin provided in the leveling plate. Connected firmly. Moreover, it is rare that the end of the flat plate is turned up and the cultivated soil enters between the flat plate and the leveling plate.

さらに、小径孔部と大径孔部とが連なったダルマ孔を、ダルマ孔の小径孔部が平板の横方向中央部側に配置されるように設けてあるため、平板と整地板との接続を解除する場合に平板を整地板から所定の力で引き離そうとすると、平板が頭付きピンに対して内側に移動し、ダルマ孔が平板の内側に引き寄せられることによって、大径孔部が頭付きピンに達して、頭付きピンが大径孔部から自動的に抜けることが期待できる。 In addition, since the dharma hole in which the small-diameter hole and the large-diameter hole are continuous is provided so that the small-diameter hole of the dharma hole is arranged on the side in the lateral direction of the flat plate, the connection between the flat plate and the leveling plate When releasing the flat plate from the leveling plate with a predetermined force, the flat plate moves inward with respect to the headed pin, and the Dharma hole is pulled inside the flat plate, so that the large-diameter hole is headed. When the pin is reached, it can be expected that the headed pin automatically comes out of the large diameter hole.

即ち、接続手段の接続を解除しさえすれば、ダルマ孔と頭付きピンとの係止状態も自動的に解除されるようにすることができるため、平板と整地板との接続解除をスムーズに実施することができ操作性が良い。 That is, as long as the connection of the connection means is released, the locked state between the dharma hole and the headed pin can be automatically released, so the connection between the flat plate and the leveling plate is smoothly released. The operability is good.

第４特徴構成は、前記平板の横方向中央部が前記カバーの後方に移動するのを規制する規制状態と、前記横方向中央部が前記カバーの後方へ移動するのを許容する解除状態に切換自在な連結手段を備える点にある。 The fourth characteristic configuration is switched between a restricting state that restricts the lateral center portion of the flat plate from moving to the rear of the cover and a release state that allows the lateral center portion to move to the rear of the cover. It is in the point provided with a flexible connection means.

〔作用及び効果〕
本構成によれば、整地板を平板から後方又は上方に離れた姿勢に保持した状態で連結手段を規制状態にすると、平板の下辺部の横方向中央部の移動が規制されて畝立て作業を行うことができ、連結手段を解除状態にすると、平板の下辺部の横方向中央部のカバーの後方への移動が許容されて、均平作業を行うことができる。
即ち、連結手段の切換えによって、畝立て作業と均平作業とを自在に切換えることができ、操作性が良い。 [Action and effect]
According to this configuration, when the connecting means is in the restricted state with the ground leveling plate held in a posture away from the flat plate backward or upward, the movement of the central portion in the horizontal direction of the lower side of the flat plate is restricted, and the uprighting work is performed. When the connecting means is in the released state, the rearward movement of the cover at the laterally central portion of the lower side of the flat plate is allowed, and leveling work can be performed.
That is, by switching the connecting means, it is possible to freely switch between the setting work and the leveling work, and the operability is good.

歩行型作業機の全体側面図である。It is the whole walk type work machine side view. 歩行型作業機の全体平面図である。It is a whole top view of a walk type work machine. 均平作業時のロータリ耕耘装置の縦断側面図である。It is a vertical side view of the rotary tiller at the time of leveling work. 均平作業時のロータリ耕耘装置の背面図である。It is a rear view of the rotary tiller at the time of leveling work. 畝立て作業時のロータリ耕耘装置の背面図である。It is a rear view of the rotary plowing device at the time of standing work. 平板の横断面図である。It is a cross-sectional view of a flat plate. ヒンジ部材の斜視図である。It is a perspective view of a hinge member. 連結部の斜視図である。It is a perspective view of a connection part. 均平作業時のロータリ耕耘装置の斜視図である。It is a perspective view of the rotary tillage device at the time of leveling work. 畝立て作業時のロータリ耕耘装置の縦断側面図である。It is a vertical side view of the rotary tillage device at the time of the uprighting work. 畝立て作業時のロータリ耕耘装置の背面図である。It is a rear view of the rotary plowing device at the time of standing work. 畝立て作業後の均平作業時のロータリ耕耘装置の縦断側面図である。It is a vertical side view of the rotary tiller at the time of leveling work after the standing work. メンテナンス作業時のロータリ耕耘装置の縦断側面図である。It is a vertical side view of the rotary tillage device at the time of maintenance work. 支持部材と高さ設定部材とを解除自在に連結する連結手段の（ａ）側面図及び（ｂ）横断面図である。It is (a) side view and (b) cross-sectional view of the connection means which connects a support member and a height setting member so that release is possible. 平板と整地板とを解除自在に連結する連結手段の縦断側面図である。It is a vertical side view of the connection means which connects a flat plate and a leveling board releasably. 平板と整地板とを解除自在に連結する連結手段の横断平面図である。It is a cross-sectional top view of the connection means which connects a flat plate and a leveling board releasably. 平板のダルマ孔と、整地板の頭付きピンとの係止状態を示す縦断背面図である。It is a vertical back view which shows the latching state of a flat dharma hole and the pin with a head of a leveling board. 平板のダルマ孔と、整地板の頭付きピンとの係止状態を示す縦断側面図である。It is a vertical side view which shows the latching state of a flat dharma hole and the pin with a head of a leveling board.

〔実施形態〕
図１〜図１８に基づいて、本発明に係るロータリ耕耘装置を歩行型作業機に適用した場合の実施形態について説明する。 Embodiment
Based on FIGS. 1-18, embodiment at the time of applying the rotary tilling apparatus which concerns on this invention to a walk type work machine is described.

[全体構成]
図１及び図２に示すように、歩行型作業機は、ミッションケース１の下部の右及び左側部に車軸２が備えられ、右及び左の車軸２に走行用の車輪３が連結されており、ミッションケース１の前部に連結された支持フレーム４にエンジン５が支持されて構成されている。 [overall structure]
As shown in FIGS. 1 and 2, the walking work machine is provided with axles 2 on the right and left sides of the lower part of the mission case 1, and traveling wheels 3 are connected to the right and left axles 2. The engine 5 is supported by a support frame 4 connected to the front portion of the mission case 1.

ミッションケース１の上部から斜め後方下方に伝動ケース６が延出されて、伝動ケース６から斜め後方上方に操縦ハンドル７が延出されており、伝動ケース６にロータリ耕耘装置８が備えられている。 A transmission case 6 extends obliquely backward and downward from the upper part of the transmission case 1, and a steering handle 7 extends obliquely rearward and upward from the transmission case 6, and the transmission case 6 is provided with a rotary tiller 8. .

図１及び図２に示すように、ロータリ耕耘装置８は、伝動ケース６の下部から右及び左側に駆動軸９が延出されて、右及び左の駆動軸９に複数の正逆転爪１０（本発明の「耕耘爪」に相当する）が固定されており、正逆転爪１０の上方を覆うカバー１１、抵抗棒１２、平板１８、及び整地板２０を備えて構成されている。右及び左の駆動軸９及び正逆転爪１０は、通常は正転方向（図３の矢印Ａ１の方向）に回転駆動されるが、逆転方向（図３の矢印Ａ２の方向）にも回転駆動することが可能である。 As shown in FIGS. 1 and 2, the rotary tiller 8 includes a drive shaft 9 extending from the lower part of the transmission case 6 to the right and left sides, and a plurality of forward and reverse rotation claws 10 ( (Corresponding to the “cultivation claw” of the present invention) is fixed, and includes a cover 11 covering the upper side of the forward / reverse claw 10, a resistance bar 12, a flat plate 18, and a leveling plate 20. The right and left drive shafts 9 and the forward / reverse claw 10 are normally driven to rotate in the forward direction (the direction of arrow A1 in FIG. 3), but are also rotationally driven in the reverse direction (the direction of arrow A2 in FIG. 3). Is possible.

図３及び図４に示すように、カバー１１は、半円筒状の天井部１１ａの右及び左側部に、扇形状の横壁部１１ｂが連結されて構成され、伝動ケース６の上方、右及び左の駆動軸９及び正逆転爪１０の上方を覆っており、伝動ケース６のブラケット（図示せず）にカバー１１の天井部１１ａが連結されている。 As shown in FIGS. 3 and 4, the cover 11 is configured by connecting a fan-shaped lateral wall portion 11 b to the right and left sides of the semicylindrical ceiling portion 11 a, and the upper, right and left sides of the transmission case 6. The ceiling 11a of the cover 11 is connected to a bracket (not shown) of the transmission case 6.

図３及び図４に示すように、伝動ケース６に固定されたブラケット１３が後方に延出され、幅狭の角パイプ状のブラケット１４がブラケット１３に固定されて、ブラケット１４が天井部１１ａの開口部から上方に突出している。ブラケット１７がブラケット１４の上部に固定されている。抵抗棒１２をブラケット１４に固定するためのＬ字状の固定ピン１６が、ブラケット１７にスライド自在（図４の紙面左右方向）及び回転自在に支持されている。ブラケット１７には、固定ピン１６をブラケット１４の開口部（図示せず）から挿入側（図４の紙面右方）に付勢するバネ２９が備えられている。ブラケット１４の上部の後方側面には、第１フック部１４ａ(保持手段)が設けられている。 As shown in FIGS. 3 and 4, the bracket 13 fixed to the transmission case 6 extends rearward, the narrow square pipe-shaped bracket 14 is fixed to the bracket 13, and the bracket 14 is attached to the ceiling portion 11a. It protrudes upward from the opening. A bracket 17 is fixed to the upper part of the bracket 14. An L-shaped fixing pin 16 for fixing the resistance rod 12 to the bracket 14 is supported by the bracket 17 so as to be slidable (in the left-right direction in FIG. 4) and rotatable. The bracket 17 is provided with a spring 29 that urges the fixing pin 16 from the opening (not shown) of the bracket 14 to the insertion side (right side of the drawing in FIG. 4). A first hook portion 14 a (holding means) is provided on the rear side surface of the upper portion of the bracket 14.

図３及び図４に示す状態において、右及び左の駆動軸９及び正逆転爪１０を正転方向（図３の矢印Ａ１の方向）に回転駆動しながら前進することにより、圃場の耕耘（耕起）が行われる。 In the state shown in FIGS. 3 and 4, the right and left drive shafts 9 and forward / reverse claws 10 are moved forward in the forward rotation direction (the direction of arrow A1 in FIG. 3) to advance the field (plowing). Ki) is performed.

[抵抗棒（高さ設定部材）]
図３及び図４に示すように、抵抗棒１２は細長い棒状に構成されている。抵抗棒１２の上部には、その長手方向に沿って、複数個の固定孔１２ａが開口されている。また、抵抗棒１２の下端には、板状の基板１５が、抵抗棒１２の延伸方向と直交する姿勢で、機体の後方側に張り出すようにして設けられている。 [Resistance bar (height setting member)]
As shown in FIGS. 3 and 4, the resistance rod 12 is formed in an elongated rod shape. A plurality of fixing holes 12a are opened in the upper portion of the resistance rod 12 along the longitudinal direction thereof. Further, a plate-like substrate 15 is provided at the lower end of the resistance rod 12 so as to project to the rear side of the machine body in a posture orthogonal to the extending direction of the resistance rod 12.

図３及び図４に示す状態は、抵抗棒１２がブラケット１４に挿入されて、固定ピン１６が抵抗棒１２の固定孔１２ａの一つに挿入された状態であり、抵抗棒１２がブラケット１４に固定された状態である。この状態で、伝動ケース６の真後ろに抵抗棒１２が位置しており、カバー１１の天井部１１ａの後端部分の横方向中央部の下方に基板１５が位置している。 The state shown in FIGS. 3 and 4 is a state in which the resistance bar 12 is inserted into the bracket 14 and the fixing pin 16 is inserted into one of the fixing holes 12 a of the resistance bar 12. It is in a fixed state. In this state, the resistance rod 12 is positioned directly behind the transmission case 6, and the substrate 15 is positioned below the laterally central portion of the rear end portion of the ceiling portion 11 a of the cover 11.

抵抗棒１２（高さ設定部材）は、圃場面（地面）に接地してロータリ耕耘装置８の圃場面に対する高さを設定する。即ち、抵抗棒１２の下端が圃場面に接地することにより、ロータリ耕耘装置８の圃場面に対する高さが決められる。 The resistance rod 12 (height setting member) contacts the farm scene (ground) and sets the height of the rotary tiller 8 with respect to the farm scene. That is, when the lower end of the resistance bar 12 contacts the farm scene, the height of the rotary tiller 8 with respect to the farm scene is determined.

ロータリ耕耘装置８の圃場面に対する高さは、種々に変更することができる。例えば、ロータリ耕耘装置８の圃場面に対する高さをより低く設定したいとするなら、固定ピン１６を図４の紙面左方に引き抜き、約９０度回転させて、ブラケット１７の折り曲げ部１７ａに掛けて引き抜き状態に保持する。そして、抵抗棒１２を上方向に移動させ、固定ピン１６を抵抗棒１２のより下方に位置する別の固定孔１２ａに再び挿入して抵抗棒１２を固定する。これにより、ロータリ耕耘装置８に対する抵抗棒１２の高さがより高い位置に変更されるため、ロータリ耕耘装置８の圃場面に対する高さがより低く設定される。一方、ロータリ耕耘装置８の圃場面に対する高さをより高く設定したいとするなら、固定ピン１６を引き抜き状態に保持して、抵抗棒１２を下方向に移動させ、固定ピン１６を、抵抗棒１２のより上方に位置する別の固定孔１２ａに再び挿入して抵抗棒１２を固定する。 The height of the rotary tiller 8 with respect to the field scene can be changed variously. For example, if it is desired to set the height of the rotary tiller 8 with respect to the field scene to a lower level, the fixing pin 16 is pulled out to the left in FIG. 4 and rotated about 90 degrees and hung on the bent portion 17 a of the bracket 17. Hold in the pulled-out state. Then, the resistance rod 12 is moved upward, and the fixing pin 16 is reinserted into another fixing hole 12a located below the resistance rod 12 to fix the resistance rod 12. Thereby, since the height of the resistance rod 12 with respect to the rotary tiller 8 is changed to a higher position, the height of the rotary tiller 8 with respect to the field scene is set lower. On the other hand, if it is desired to set the height of the rotary tiller 8 with respect to the field scene higher, the fixing pin 16 is held in the pulled-out state, the resistance bar 12 is moved downward, and the fixing pin 16 is moved to the resistance bar 12. The resistance rod 12 is fixed by reinserting it into another fixing hole 12a positioned above the.

[平板]
図５に示すように、長方形状の平板１８は、可撓性を有するゴム板等により構成されており、その横幅がカバー１１の横幅と略同じ大きさに設定されている。 [Plate]
As shown in FIG. 5, the rectangular flat plate 18 is constituted by a flexible rubber plate or the like, and the lateral width thereof is set to be approximately the same as the lateral width of the cover 11.

図５に示すように、上辺部分２７ａ、下辺部分２７ｂ、及び上辺部分２７ａと下辺部分２７ｂとをつなぐ中間部分２７ｃを備える金属板２７（支持部材）が、平板１８の表面に取り付けられている。 As shown in FIG. 5, a metal plate 27 (support member) including an upper side portion 27 a, a lower side portion 27 b, and an intermediate portion 27 c that connects the upper side portion 27 a and the lower side portion 27 b is attached to the surface of the flat plate 18.

金属板２７の中間部分２７ｃが、平板１８の横方向中央部に配置され、金属板２７が平板１８の横方向中央部を中心線として正面視で左右対称となるように設けられている。 An intermediate portion 27c of the metal plate 27 is disposed in the laterally central portion of the flat plate 18, and the metal plate 27 is provided so as to be bilaterally symmetric in front view with the lateral central portion of the flat plate 18 as a center line.

金属板２７の上下幅は平板１８の上下幅と略等しく、金属板２７の上辺部分２７ａの横幅は平板１８の横幅よりも短く、且つ下辺部分２７ｂの横幅よりも大きい。また、中間部分２７ｃの下辺部分２７ｂ側には、下辺部分２７ｂに近づくほど幅広となる山状部Ｍが設けられている。尚、本明細書中、各構成部材の表面とは歩行型作業機の後方に面する側を意味しており、裏面とはロータリ耕耘装置８に面する側を意味する。 The vertical width of the metal plate 27 is substantially equal to the vertical width of the flat plate 18, and the horizontal width of the upper side portion 27 a of the metal plate 27 is shorter than the horizontal width of the flat plate 18 and larger than the horizontal width of the lower side portion 27 b. Further, on the lower side portion 27b side of the intermediate portion 27c, there is provided a mountain-shaped portion M that becomes wider as it approaches the lower side portion 27b. In addition, in this specification, the surface of each structural member means the side which faces the back of a walk-type working machine, and a back surface means the side which faces the rotary tiller 8.

また、金属板２７の上辺部分２７ａ及び下辺部分２７ｂのそれぞれの両端には、図５に示すように、平板１８が天井部１１ａの後端部分に垂れ下がる状態において、下側ほど幅狭となるようなテーパー面Ｓ１，Ｓ２が形成されている。 Further, as shown in FIG. 5, at the both ends of the upper side portion 27a and the lower side portion 27b of the metal plate 27, the lower side becomes narrower as the flat plate 18 hangs down on the rear end portion of the ceiling portion 11a. Tapered surfaces S1 and S2 are formed.

図５及び図６に示すように、金属板２７は、その上辺部分２７ａ及び下辺部分２７ｂにおいて、平板１８にわたるようにボルトＢ１を貫通させて、平板１８の裏面側からナットで締結させて固定してある。 As shown in FIGS. 5 and 6, the metal plate 27 has its upper side portion 27 a and lower side portion 27 b passed through the bolt B <b> 1 across the flat plate 18, and fastened with a nut from the back side of the flat plate 18 and fixed. It is.

[整地板]
図３に示すように、長方形状の整地板２０は、金属製であって、平板１８の後方に配置される。図３及び図４に示すように、本実施形態における整地板２０の上下幅及び横幅は、平板１８よりも少し大きく設定されているが、同じ大きさに設定しても良い。 [Leveling board]
As shown in FIG. 3, the rectangular ground leveling plate 20 is made of metal and disposed behind the flat plate 18. As shown in FIGS. 3 and 4, the vertical and horizontal widths of the leveling plate 20 in the present embodiment are set slightly larger than the flat plate 18, but may be set to the same size.

図３に示すように、整地板２０の下端部分が前方に折れ曲がっており、図４に示すように整地板２０の下端部分には、鋸歯状の整地部２１が形成されている。図３及び図９に示す状態では、整地部２１が平板１８の下端よりも下側に位置する状態になる。 As shown in FIG. 3, the lower end portion of the leveling plate 20 is bent forward, and a sawtooth leveling portion 21 is formed at the lower end portion of the leveling plate 20 as shown in FIG. 3 and 9, the leveling portion 21 is positioned below the lower end of the flat plate 18.

図４に示すように、整地板２０の表面側には、横方向中央部を中心線として正面視で左右対称となるように、上下方向に延びる５本のリブ２２が横方向に並設されている。尚、この５本のリブ２２は、整地板２０を補強するためのものである。 As shown in FIG. 4, on the surface side of the leveling plate 20, five ribs 22 extending in the vertical direction are juxtaposed in the horizontal direction so as to be symmetrical in the front view with the central portion in the horizontal direction as the center line. ing. The five ribs 22 are for reinforcing the leveling plate 20.

また整地板２０の表面側における横方向中央部の下側部分には、整地板２０の横方向中央部を中心線として、その中心線の左右両側に一つずつ、横方向に貫通する半円筒状の貫通部２３が形成されている。Ｕ字型のフック部材２４（保持手段）が、その左右の端部のそれぞれを左右の貫通部２３に対して中心線側から嵌め込むことによって、貫通部２３を支点として上下に揺動可能に支持されている。尚、フック部材２４は、整地板２０を持ち上げるときの把手としても使用される。 Further, in the lower portion of the horizontal central portion on the surface side of the leveling plate 20, a semi-cylinder penetrating in the horizontal direction, with the horizontal central portion of the leveling plate 20 as the center line, one on each of the left and right sides of the center line. A penetrating portion 23 is formed. The U-shaped hook member 24 (holding means) can swing up and down around the penetrating portion 23 as a fulcrum by fitting each of the left and right end portions to the left and right penetrating portions 23 from the center line side. It is supported. The hook member 24 is also used as a handle when lifting the leveling plate 20.

[接続手段]
平板１８と整地板２０とを解除自在に接続する接続手段は、整地板２０の横方向中央部に設けた挟持部材２５と、平板１８の横方向中央部に設けた被挟持部材２８とを備えて構成される。 [Connection method]
The connecting means for releasably connecting the flat plate 18 and the leveling plate 20 includes a clamping member 25 provided at the laterally central portion of the leveling plate 20 and a clamped member 28 provided at the laterally central portion of the flat plate 18. Configured.

被挟持部材２８は、平面視でコの字型を有しており、金属板２７の中間部分２７ｃの山状部Ｍに溶接により立設されている。尚、被挟持部材２８は、平板１８を持ち上げるときの把手としても使用される。 The sandwiched member 28 has a U shape in plan view, and is erected on the mountain-shaped portion M of the intermediate portion 27 c of the metal plate 27 by welding. The clamped member 28 is also used as a handle when lifting the flat plate 18.

整地板２０の２つの貫通部２３の間に、被挟持部材２８が通過可能な矩形の開口部３０が形成されており、その開口部３０を覆うように、ハット曲げ加工されたケーシング３１が整地板２０の表面に溶接されている。このとき、ケーシング３１の凹部３１ａと整地板２０の開口部３０とが連通状態となると共に、ケーシング３１の凹部３１ａによって、挟持部材２５（図８参照）を収容するための空間が形成される。 A rectangular opening 30 through which the sandwiched member 28 can pass is formed between the two penetrating parts 23 of the leveling plate 20, and the hat-bent casing 31 is arranged so as to cover the opening 30. It is welded to the surface of the main plate 20. At this time, the recess 31a of the casing 31 and the opening 30 of the leveling plate 20 are in communication with each other, and a space for accommodating the clamping member 25 (see FIG. 8) is formed by the recess 31a of the casing 31.

図１５及び図１６に示すように、挟持部材２５は、ケーシング３１の凹部３１ａの天板３１ｂにボルト及びナットで固定される。挟持部材２５は、一枚の板を折り曲げて形成される板バネ２５ａを備え、この板バネ２５ａによって、被挟持部材２８を挟持するための挟持部２５ｂが形成される。挟持部材２５は、その挟持部２５ｂを整地板２０の開口部３０側に向けた状態で、ケーシング３１の凹部３１ａ内に配置される。 As shown in FIGS. 15 and 16, the clamping member 25 is fixed to the top plate 31 b of the recess 31 a of the casing 31 with bolts and nuts. The sandwiching member 25 includes a leaf spring 25a formed by bending a single plate, and a sandwiching portion 25b for sandwiching the sandwiched member 28 is formed by the leaf spring 25a. The clamping member 25 is disposed in the recess 31 a of the casing 31 with the clamping portion 25 b facing the opening 30 side of the leveling plate 20.

平板１８と整地板２０とを接続する場合、平板１８と整地板２０とを互いに近づけて、平板１８の被挟持部材２８を、整地板２０の開口部３０を通過させて、ケーシング３１の凹部３１ａ内で互いに当接し合う板バネ２５ａの間にその当接力に抗して入り込ませることによって、被挟持部材２８が挟持部材２５の挟持部２５ｂによって挟持され、平板１８と整地板２０とが接続される。 When connecting the flat plate 18 and the leveling plate 20, the flat plate 18 and the leveling plate 20 are brought close to each other, the sandwiched member 28 of the flat plate 18 is passed through the opening 30 of the leveling plate 20, and the recess 31 a of the casing 31. In between the leaf springs 25a that are in contact with each other, the member to be sandwiched 28 is sandwiched by the sandwiching portion 25b of the sandwiching member 25, and the flat plate 18 and the leveling plate 20 are connected. The

平板１８と整地板２０との接続を解除する場合は、板バネ２５ａの挟持力に抗して所定の力で平板１８を整地板２０から引き離すことによって、被挟持部材２８と挟持部材２５の板バネ２５ａとを離間させれば良い。 When releasing the connection between the flat plate 18 and the leveling plate 20, the plate of the sandwiched member 28 and the clamping member 25 is separated by pulling the flat plate 18 away from the leveling plate 20 with a predetermined force against the clamping force of the plate spring 25 a. What is necessary is just to space apart the spring 25a.

[補助接続手段]
図５、図１７及び図１８に示すように、平板１８と整地板２０とを解除自在に接続する補助接続手段は、平板１８の右端及び左端のそれぞれの上部に設けられたダルマ孔３２と、整地板２０の右端及び左端のそれぞれの上部に立設された頭付きピン３３とを備えて構成されている。 [Auxiliary connection means]
As shown in FIGS. 5, 17, and 18, the auxiliary connecting means for releasably connecting the flat plate 18 and the leveling plate 20 includes dharma holes 32 provided at the upper portions of the right end and the left end of the flat plate 18, respectively. The ground leveling plate 20 is provided with a headed pin 33 erected on each upper part of the right end and the left end.

ダルマ孔３２は、小径孔部３２ａと大径孔部３２ｂとが連なっており、小径孔部３２ａが平板１８の横方向中央部側に配置されるように設けられている。また、小径孔部３２ａの径は、頭付きピン３３の頭部の径よりも小さいが、大径孔部３２ｂの径は、頭付きピン３３の頭部の径よりも大きく設定されている。 The dharma hole 32 includes a small-diameter hole portion 32 a and a large-diameter hole portion 32 b that are continuous with each other, and the small-diameter hole portion 32 a is disposed on the laterally central portion side of the flat plate 18. The diameter of the small-diameter hole 32 a is smaller than the diameter of the head of the headed pin 33, but the diameter of the large-diameter hole 32 b is set larger than the diameter of the head of the headed pin 33.

平板１８と整地板２０とを接続する場合、平板１８と整地板２０とを互いに近づけて、頭付きピン３３の頭部を、ダルマ孔３２の大径孔部３２ｂから挿入して、ダルマ孔３２の小径孔部３２ａに係止させることにより、平板１８の右端及び左端のそれぞれの上部が、整地板２０の右端及び左端のそれぞれの上部に固定されて平板１８と整地板２０とが接続される。 When connecting the flat plate 18 and the leveling plate 20, the flat plate 18 and the leveling plate 20 are brought close to each other, and the head of the headed pin 33 is inserted from the large-diameter hole portion 32 b of the Dalma hole 32. The upper ends of the right and left ends of the flat plate 18 are fixed to the upper portions of the right and left ends of the leveling plate 20 so that the flat plate 18 and the leveling plate 20 are connected. .

平板１８と整地板２０との接続を解除する場合は、平板１８を整地板２０から所定の力で引き離そうとすると、平板１８が頭付きピン３３に対して内側に移動し、ダルマ孔３２が平板１８の内側に引き寄せられることによって、大径孔部３２ｂが頭付きピン３３に達して、頭付きピン３３が大径孔部３２ｂから自動的に抜けて、平板１８と整地板２０との接続が解除される。 When releasing the connection between the flat plate 18 and the leveling plate 20, when the flat plate 18 is pulled away from the leveling plate 20 with a predetermined force, the flat plate 18 moves inward with respect to the headed pin 33, and the Dalma hole 32 is flat. 18, the large diameter hole portion 32 b reaches the headed pin 33, the headed pin 33 is automatically removed from the large diameter hole portion 32 b, and the flat plate 18 and the leveling plate 20 are connected. Canceled.

[連結手段]
図５、及び図１４（ａ），（ｂ）に示すように、金属板２７（支持部材）と抵抗棒１２（高さ設定部材）とを解除自在に連結する連結手段は、金属板２７に設けたピン部材３４と、基板１５のピン孔１５ａとを備えて構成される。 [Connecting means]
As shown in FIG. 5 and FIGS. 14A and 14B, the connecting means for releasably connecting the metal plate 27 (support member) and the resistance rod 12 (height setting member) is attached to the metal plate 27. The pin member 34 provided and the pin hole 15a of the substrate 15 are provided.

ピン部材３４は、金属板２７の下辺部分２７ｂの横方向中央部に、金属板２７の下辺部分２７ｂの下端から下方に突出する状態で溶接されている。 The pin member 34 is welded to the lateral central portion of the lower side portion 27b of the metal plate 27 so as to protrude downward from the lower end of the lower side portion 27b of the metal plate 27.

ピン孔１５ａは、図１４（ｂ）に示すように、機体の後方側から小径部と大径部とが連なり、基板１５の略中央部において厚み方向に貫通するように設けられている。 As shown in FIG. 14 (b), the pin hole 15 a is provided so that a small diameter portion and a large diameter portion are continuous from the rear side of the machine body and penetrates in a thickness direction at a substantially central portion of the substrate 15.

連結手段は、金属板２７と抵抗棒１２とを連結することによって、金属板２７の下辺部分２７ｂ（平板１８の下辺部の横方向中央部、図５参照）のカバー１１の後方への移動を規制する規制状態と、金属板２７と抵抗棒１２との連結を解除することによって、金属板２７の下辺部分２７ｂのカバー１１の後方への移動を許容する解除状態とに切換自在に構成されている。 The connecting means connects the metal plate 27 and the resistance rod 12, thereby moving the lower side portion 27 b of the metal plate 27 (laterally central portion of the lower side portion of the flat plate 18, see FIG. 5) to the rear of the cover 11. It is configured to be switchable between a restricting state for restricting and a releasing state for allowing the lower side portion 27b of the metal plate 27 to move rearward of the cover 11 by releasing the connection between the metal plate 27 and the resistance rod 12. Yes.

連結手段を規制状態にするには、ピン部材３４をピン孔１５ａに挿入する。このとき、抵抗棒１２の固定を一旦解除して上方向に移動させることにより、基板１５を上方に移動させて、そのピン孔１５ａにピン部材３４を挿入させた後、再び抵抗棒１２を固定する。ピン部材３４がピン孔１５ａに挿入されることによって、畝立て作業時に平板１８が圃場の土圧を受けても、金属板２７のピン部材３４が基板１５のピン孔１５ａに掛止されるため、金属板２７の下辺部分２７ｂがカバー後方に移動しない。 In order to place the connecting means in the restricted state, the pin member 34 is inserted into the pin hole 15a. At this time, the resistance rod 12 is temporarily released and moved upward to move the substrate 15 upward, the pin member 34 is inserted into the pin hole 15a, and then the resistance rod 12 is fixed again. To do. By inserting the pin member 34 into the pin hole 15a, the pin member 34 of the metal plate 27 is hooked on the pin hole 15a of the substrate 15 even when the flat plate 18 receives earth pressure in the field during the uprighting work. The lower side portion 27b of the metal plate 27 does not move rearward of the cover.

一方、連結手段を解除状態にするには、抵抗棒１２の固定を一旦解除して下方向に移動させ、ピン部材３４をピン孔１５ａから外した後、再び抵抗棒１２を固定すれば良い。これにより、作業時に平板１８が圃場の土圧を受けると、金属板２７の下辺部分２７ｂを含む平板１８の全体がカバー後方に移動可能となる。 On the other hand, in order to release the connecting means, the resistance rod 12 is temporarily released and moved downward, the pin member 34 is removed from the pin hole 15a, and then the resistance rod 12 is fixed again. As a result, when the flat plate 18 is subjected to the earth pressure in the field during work, the entire flat plate 18 including the lower side portion 27b of the metal plate 27 can be moved rearward of the cover.

[保持手段]
図１０、図１２、及び図１３に示すように、整地板２０を平板１８から後方又は上方に離れた姿勢に解除自在に保持する保持手段は、整地板２０のフック部材２４と、ブラケット１４の第１フック部１４ａとを備えて構成される。 [Holding means]
As shown in FIGS. 10, 12, and 13, the holding means for releasably holding the leveling plate 20 in a posture away from the flat plate 18 rearwardly or upwardly includes a hook member 24 of the leveling plate 20 and the bracket 14. And a first hook portion 14a.

整地板２０のフック部材２４をブラケット１４の第１フック部１４ａに掛止させることによって、整地板２０を平板１８から上方に離れた姿勢に保持することができる。 By hooking the hook member 24 of the leveling plate 20 to the first hook portion 14 a of the bracket 14, the leveling plate 20 can be held in a posture away from the flat plate 18.

[平板及び整地板のカバーとの連結]
図３に示すように、平板１８及び整地板２０が、カバー１１の天井部１１ａの後端部分にヒンジ部材２６（図７参照）を介して上下に揺動可能に連結されている。 [Connection with flat plate and leveling plate cover]
As shown in FIG. 3, the flat plate 18 and the leveling plate 20 are connected to the rear end portion of the ceiling portion 11 a of the cover 11 so as to be swingable up and down via a hinge member 26 (see FIG. 7).

図７に示すように、ヒンジ部材２６は、貫通孔Ｈ１を有する第１ヒンジ面２６ａと、該第１ヒンジ面２６ａに対してそれぞれ別に揺動自在に並設して枢支連結される第２ヒンジ面２６ｂ及び第３ヒンジ面２６ｃとを備えて構成される。図４に示すように、ヒンジ部材２６の第１ヒンジ面２６ａが天井部１１ａの後端部分の左右両端側において、ボルトＢ２とナットによって固定される。 As shown in FIG. 7, the hinge member 26 includes a first hinge surface 26 a having a through hole H <b> 1, and a second hinge that is pivotally connected to the first hinge surface 26 a so as to be swingable in parallel. A hinge surface 26b and a third hinge surface 26c are provided. As shown in FIG. 4, the 1st hinge surface 26a of the hinge member 26 is fixed by the volt | bolt B2 and a nut in the right-and-left both ends side of the rear-end part of the ceiling part 11a.

図４に示すように、細長い平板状の固定部材１９が、天井部１１ａの後端部分の裏面にボルトＢ２，Ｂ３とナット（図示せず）によって固定されている。固定部材１９の長手方向の長さは、天井部１１ａの横幅とほぼ同じ長さに設定されている。固定部材１９の両端部分には、ストッパー部１９ａが形成されており、天井部１１ａの後端部分の裏面に配置する際、ストッパー部１９ａが天井部１１ａの後端部分から後方に少しはみ出した状態となる。 As shown in FIG. 4, an elongated flat plate-shaped fixing member 19 is fixed to the back surface of the rear end portion of the ceiling portion 11a by bolts B2 and B3 and a nut (not shown). The length of the fixing member 19 in the longitudinal direction is set to be substantially the same as the lateral width of the ceiling portion 11a. Stopper portions 19a are formed at both end portions of the fixing member 19, and the stopper portion 19a slightly protrudes rearward from the rear end portion of the ceiling portion 11a when arranged on the back surface of the rear end portion of the ceiling portion 11a. It becomes.

図３及び図４に示すように、天井部１１ａの後端部分の左右両端側において、天井部１１ａの表面側に配置されるヒンジ部材２６の第１ヒンジ面２６ａと、天井部１１ａの裏面側に配置される固定部材１９とにわたるようにボルトＢ２を貫通させて、固定部材１９の側からナット（図示せず）で締結することによって、ヒンジ部材２６と固定部材１９とが伴締め固定されている。 As shown in FIGS. 3 and 4, on the left and right ends of the rear end portion of the ceiling portion 11a, the first hinge surface 26a of the hinge member 26 disposed on the surface side of the ceiling portion 11a and the back surface side of the ceiling portion 11a The hinge member 26 and the fixing member 19 are fastened and fixed together by passing the bolt B2 so as to extend over the fixing member 19 disposed on the fastening member 19 and fastening with a nut (not shown) from the fixing member 19 side. Yes.

図７に示すように、ヒンジ部材２６の第２ヒンジ面２６ｂには、貫通孔Ｈ２が設けられている。図５に示すように、第２ヒンジ面２６ｂ、金属板２７の上辺部分２７ａの左右両端部分、及び平板１８にわたるようにボルトＢ５を貫通させて、平板１８の裏面側からナット（図示せず）で締結することによって、平板１８がヒンジ部材２６の第２ヒンジ面２６ｂに連結される。これにより、平板１８及び金属板２７が、ヒンジ部材２６によって天井部１１ａの後端部分に上下揺動自在に支持される。尚、平板１８の連結方法については、上記構成に限定されるものではなく、単に平板１８の上端部分をボルトとナットで天井部１１ａの後端部分に直接固定するようにしても良い。 As shown in FIG. 7, the second hinge surface 26 b of the hinge member 26 is provided with a through hole H <b> 2. As shown in FIG. 5, a bolt B5 is passed through the second hinge surface 26b, the left and right end portions 27a of the upper side portion 27a of the metal plate 27, and the flat plate 18, and a nut (not shown) is formed from the back side of the flat plate 18. The flat plate 18 is connected to the second hinge surface 26b of the hinge member 26 by fastening at the above. As a result, the flat plate 18 and the metal plate 27 are supported by the hinge member 26 on the rear end portion of the ceiling portion 11a so as to be swingable up and down. In addition, about the connection method of the flat plate 18, it is not limited to the said structure, You may make it just fix the upper end part of the flat plate 18 directly to the rear-end part of the ceiling part 11a with a volt | bolt and a nut.

また、図４に示すように、ヒンジ部材２６の第３ヒンジ面２６ｃの表面と、整地板２０の裏面の左右上端部分とを溶接することによって、整地板２０がヒンジ部材２６の第３ヒンジ面２６ｃに連結される。 Further, as shown in FIG. 4, the leveling plate 20 is welded to the surface of the third hinge surface 26 c of the hinge member 26 and the left and right upper end portions of the back surface of the leveling plate 20, so that the leveling plate 20 is connected to the third hinge surface of the hinge member 26. 26c.

[均平作業]
次に、均平作業について説明する。
均平作業を行う場合、先ず、固定ピン１６を引き抜き状態に保持して、抵抗棒１２の固定を一旦解除して下方向に移動させ、ピン部材３４をピン孔１５ａから抜き出して金属板２７と抵抗棒１２との連結を解除する。そして、平板１８と整地板２０とを後方に揺動させた後、再び抵抗棒１２を上方向に移動させて固定する。 [Leveling work]
Next, leveling work will be described.
When performing the leveling operation, first, the fixing pin 16 is held in the pulled-out state, the resistance rod 12 is temporarily released and moved downward, and the pin member 34 is extracted from the pin hole 15a and the metal plate 27 and The connection with the resistance rod 12 is released. Then, after swinging the flat plate 18 and the leveling plate 20 backward, the resistance rod 12 is moved upward again and fixed.

このとき、平板１８の被挟持部材２８が整地板２０の挟持部材２５に挟持されると共に、平板１８の２つのダルマ孔３２のそれぞれに整地板２０の２つの頭付きピン３３のそれぞれが係止しており、合計３箇所で接続状態となっている。 At this time, the clamped member 28 of the flat plate 18 is clamped by the clamp member 25 of the leveling plate 20, and each of the two headed pins 33 of the leveling plate 20 is engaged with each of the two dharma holes 32 of the flat plate 18. It is connected in a total of three places.

また、整地板２０の左右の上端部が固定部材１９のストッパー部１９ａ（図４参照）に係止されるため、図３に示すように平板１８及び整地板２０が、正逆転爪１０側にこれ以上揺動せず、側面視で斜めに傾斜した姿勢に保持される。 Further, since the left and right upper end portions of the leveling plate 20 are locked to the stopper portions 19a (see FIG. 4) of the fixing member 19, the flat plate 18 and the leveling plate 20 are moved to the forward / reverse claw 10 side as shown in FIG. It does not swing any more and is held in an inclined position in side view.

図３に示す平板１８と挟持部材２５の接続状態では、平板１８と整地板２０との間に先端側（下端側）ほど前後幅が徐々に広くなる隙間が形成される。尚、図示しないが、平板１８と整地板２０との間に基端側から先端側に亘って前後幅が均等な隙間が形成されるように挟持部材２５及び被挟持部材２８を構成しても良い。 In the connection state of the flat plate 18 and the clamping member 25 shown in FIG. 3, a gap is formed between the flat plate 18 and the leveling plate 20 so that the front-rear width (lower end side) gradually increases. Although not shown, the sandwiching member 25 and the sandwiched member 28 may be configured such that a gap having a uniform front-rear width is formed between the flat plate 18 and the leveling plate 20 from the proximal end side to the distal end side. good.

図９に示すように、機体の前進に伴い、ロータリ耕耘装置８において、右及び左の駆動軸９及び正逆転爪１０を正転方向（図３の矢印Ａ１の方向）に回転駆動することにより、耕起された土が平板１８の裏面により受け止められて、平板１８及び整地板２０が後方に移動し、整地板２０の整地部２１によって均平面が形成される。このとき、平板１８の被挟持部材２８と整地板２０の挟持部材２５との連結によって、平板１８と整地板２０との間に隙間が設けられるため、平板１８が弾性変形し易く、耕耘により飛散した石が平板１８に当たってその衝撃が吸収されるため、整地板２０が破損し難い。さらに、均平作業中に平板１８が前後方向に振動し易いため、耕起土が平板１８に付着し難い。 As shown in FIG. 9, the rotary tiller 8 rotates the right and left drive shafts 9 and forward / reverse claws 10 in the forward rotation direction (the direction of arrow A1 in FIG. 3) as the machine moves forward. The cultivated soil is received by the back surface of the flat plate 18, the flat plate 18 and the leveling plate 20 move rearward, and a leveling surface is formed by the leveling portion 21 of the leveling plate 20. At this time, a gap is provided between the flat plate 18 and the leveling plate 20 due to the connection between the clamped member 28 of the flat plate 18 and the clamping member 25 of the leveling plate 20, so that the flat plate 18 is easily elastically deformed and scattered by tillage. Since the hit stone hits the flat plate 18 and the impact is absorbed, the leveling plate 20 is not easily damaged. Further, since the flat plate 18 easily vibrates in the front-rear direction during the leveling operation, the cultivated soil does not easily adhere to the flat plate 18.

[畝立て作業]
次に、畝立て作業について説明する。
畝立て作業を行う場合、先ず、図１０に示すように、整地板２０のみを上方に回動させて、被挟持部材２８と挟持部材２５との接続、及びダルマ孔３２と頭付きピン３３との係止を解除し、さらに整地板２０のフック部材２４をブラケット１４の第１フック部１４ａに掛止させることによって、整地板２０を平板１８から上方に離れた姿勢に保持する。尚、整地板２０は、形成される畝よりも高い位置に保持されるようにすればよく、上方に限らず平板１８から後方に離れた姿勢に保持するようにしても良い。 [Staging work]
Next, the setting work will be described.
When performing the erection work, first, as shown in FIG. 10, only the leveling plate 20 is rotated upward to connect the sandwiched member 28 and the sandwiching member 25, and the dharma hole 32 and the headed pin 33. Is released, and the leveling plate 20 is held in a posture away from the flat plate 18 by hooking the hook member 24 of the leveling plate 20 to the first hook portion 14 a of the bracket 14. The leveling plate 20 may be held at a position higher than the ridges to be formed, and may be held in a posture away from the flat plate 18 without being limited to the upper side.

次いで、平板１８のピン部材３４を、基板１５のピン孔１５ａに挿入し、金属板２７と抵抗棒１２とを連結して規制状態とする。このとき、抵抗棒１２の固定を一旦解除して上方向に移動させることにより、基板１５を上方に移動させて、ピン孔１５ａにピン部材３４を挿入させた後、再び抵抗棒１２を固定する。 Next, the pin member 34 of the flat plate 18 is inserted into the pin hole 15a of the substrate 15, and the metal plate 27 and the resistance rod 12 are connected to be in a restricted state. At this time, the resistor rod 12 is temporarily released and moved upward to move the substrate 15 upward, the pin member 34 is inserted into the pin hole 15a, and then the resistor rod 12 is fixed again. .

これにより、図１０及び図１１に示すように、金属板２７のピン部材３４が基板１５のピン孔１５ａの小径部に掛止されるため、金属板２７の下辺部分２７ｂ（平板１８の下辺部の横方向中央部）のカバー１１の後方への移動が規制される。 10 and 11, since the pin member 34 of the metal plate 27 is hooked on the small diameter portion of the pin hole 15a of the substrate 15, the lower side portion 27b of the metal plate 27 (the lower side portion of the flat plate 18). The rearward movement of the cover 11 at the center in the horizontal direction) is restricted.

機体の前進に伴って、正逆転爪１０の正転方向（図８の矢印Ａ１の方向）の回転駆動によって耕起された土が平板１８により受け止められるが、平板１８に設けた金属板２７の下辺部分２７ｂがカバー１１の後方に移動せず、平板１８の左右の横側部が後方に移動することになる。 As the machine moves forward, soil cultivated by the rotational drive in the forward rotation direction of the forward / reverse claw 10 (the direction of the arrow A1 in FIG. 8) is received by the flat plate 18, but the metal plate 27 provided on the flat plate 18 The lower side portion 27b does not move rearward of the cover 11, and the left and right lateral sides of the flat plate 18 move rearward.

その結果、図１１に示すように、平板１８において、金属板２７の上辺部分２７ａの左右両端のテーパー面Ｓ１，Ｓ１のそれぞれと、下辺部分２７ｂの左右両端のテーパー面Ｓ２，Ｓ２のそれぞれとをつなぐ仮想線Ｔ１（図５参照）を折り曲げ線として、平板１８の一方及び他方の横側部が斜めに後方に折れ曲がるような状態となる。 As a result, as shown in FIG. 11, in the flat plate 18, the taper surfaces S1 and S1 at the left and right ends of the upper side portion 27a of the metal plate 27 and the taper surfaces S2 and S2 at the left and right ends of the lower side portion 27b are respectively obtained. With the imaginary line T1 (see FIG. 5) to be connected as a fold line, one and the other lateral sides of the flat plate 18 are bent obliquely backward.

そして、図１１に示すように、平板１８の下辺部の横方向中央部と平板１８に設けた金属板２７の下辺部分２７ｂによって畝Ｃの底部Ｃ１が形成され、平板１８の折れ曲がった左右の横側部によって、右及び左の横側の畝Ｃの壁部Ｃ２が形成される。 Then, as shown in FIG. 11, the bottom C1 of the heel C is formed by the lateral center of the lower side of the flat plate 18 and the lower side portion 27b of the metal plate 27 provided on the flat plate 18, and the left and right lateral sides of the flat plate 18 are bent. The side portion forms the wall portion C2 of the right and left lateral ridge C.

[畝立て作業後の均平作業]
次に、畝立て作業後の均平作業について説明する。この作業は、畝間に生えた草の除草等を行うために、形成した畝を崩さずに畝間の圃場の耕耘作業を実施するものである。 [Leveling work after erection work]
Next, the leveling work after the erecting work will be described. In this operation, in order to perform weeding of the grass grown in the furrows, the cultivation work of the farm fields between the furrows is performed without breaking the formed straw.

図１２に示すように、整地板２０のフック部材２４をブラケット１４の第１フック部１４ａに掛止させることによって、整地板２０を平板１８から上方に離れた姿勢に保持する。 As shown in FIG. 12, the leveling plate 20 is held in a posture away from the flat plate 18 by hooking the hook member 24 of the leveling plate 20 to the first hook portion 14 a of the bracket 14.

さらに、固定ピン１６を引き抜き状態に保持して、抵抗棒１２の固定を一旦解除して下方向に移動させ、ピン部材３４をピン孔１５ａから抜き出して金属板２７と抵抗棒１２との連結を解除する。そして、平板１８を後方に揺動させた後、再び抵抗棒１２を上方向に移動させて固定する。 Further, the fixing pin 16 is held in the pulled-out state, the resistance rod 12 is once fixed and moved downward, the pin member 34 is extracted from the pin hole 15a, and the metal plate 27 and the resistance rod 12 are connected. To release. And after rocking | fluctuating the flat plate 18 back, the resistance bar | burr 12 is moved upward again and fixed.

これにより、機体の前進に伴い、ロータリ耕耘装置８において、右及び左の駆動軸９及び正逆転爪１０を正転方向（図３の矢印Ａ１の方向）に回転駆動して耕起された土が平板１８の裏面により受け止められて、平板１８が後方に移動する。このとき、平板１８の一方及び他方の横側部が、畝Ｃの壁部Ｃ２に沿うように斜めに後方に折れ曲がる状態となるため、形成した畝を崩さずに畝間の圃場の耕耘作業を実施することができる。 As a result, the soil tilled by rotating the right and left drive shafts 9 and the forward / reverse rotation pawls 10 in the forward rotation direction (the direction of the arrow A1 in FIG. 3) in the rotary tiller 8 as the aircraft advances. Is received by the back surface of the flat plate 18, and the flat plate 18 moves backward. At this time, one side and the other side of the flat plate 18 are bent obliquely rearward along the wall C2 of the ridge C, so that the cultivation work in the field between the ridges is carried out without breaking the fold formed. can do.

[メンテナンス作業]
最後に、ロータリ耕耘装置８において、駆動軸９や正逆転爪１０等のメンテナンス作業を行う場合について説明する。 [Maintenance work]
Finally, a case where maintenance work is performed on the drive shaft 9 and the forward / reverse claw 10 in the rotary tiller 8 will be described.

均平作業を終えた後にメンテナンス作業を実施する場合、図３に示す状態から、平板１８と整地板２０とを一緒に上方に回動させて、整地板２０のフック部材２４をブラケット１４の第１フック部１４ａに掛止させる。これにより、図１３に示すように、平板１８と整地板２０とが上方に持ち上げられた姿勢に保持される。その結果、平板１８や整地板２０が邪魔になることがなく、効率良く駆動軸９や正逆転爪１０等のメンテナンス作業を実施することができる。 When the maintenance work is performed after the leveling work is finished, the flat plate 18 and the leveling plate 20 are rotated upward together from the state shown in FIG. 1 hook part 14a is hooked. Thereby, as shown in FIG. 13, the flat plate 18 and the leveling board 20 are hold | maintained at the attitude | position lifted upwards. As a result, the flat plate 18 and the leveling plate 20 do not get in the way, and the maintenance work for the drive shaft 9 and the forward / reverse claw 10 can be performed efficiently.

また、畝立て作業を終えた後にメンテナンス作業を実施する場合、図１０に示す状態において、固定ピン１６を引き抜き状態に保持して、抵抗棒１２の固定を一旦解除して下方向に移動させ、ピン部材３４を基板１５のピン孔１５ａから抜き出して金属板２７と抵抗棒１２との連結を解除する。 Also, when carrying out maintenance work after finishing the erection work, in the state shown in FIG. 10, the fixing pin 16 is held in the pulled-out state, and the fixing of the resistance rod 12 is once released and moved downward, The pin member 34 is extracted from the pin hole 15a of the substrate 15 to release the connection between the metal plate 27 and the resistance rod 12.

次いで、図１３に示すように、平板１８を上方に回動させて、平板１８の被挟持部材２８と整地板２０の挟持部材２５とを接続させる。これにより、平板１８と整地板２０とが上方に持ち上げられた姿勢に保持される。その結果、平板１８や整地板２０が邪魔になることがなく、効率良く駆動軸９や正逆転爪１０等のメンテナンス作業を実施することができる。 Next, as shown in FIG. 13, the flat plate 18 is rotated upward to connect the sandwiched member 28 of the flat plate 18 and the sandwiching member 25 of the leveling plate 20. Thereby, the flat plate 18 and the leveling board 20 are hold | maintained at the attitude | position lifted upwards. As a result, the flat plate 18 and the leveling plate 20 do not get in the way, and the maintenance work for the drive shaft 9 and the forward / reverse claw 10 can be performed efficiently.

また、畝立て作業後の均平作業を終えた後にメンテナンス作業を実施する場合、図１２に示す状態において、平板１８を上方に回動させて、平板１８の被挟持部材２８と整地板２０の挟持部材２５とを接続させる。これにより、平板１８と整地板２０とが上方に持ち上げられた姿勢に保持される。 Further, when the maintenance work is performed after the leveling work after the erection work is finished, in the state shown in FIG. 12, the flat plate 18 is rotated upward so that the sandwiched member 28 of the flat plate 18 and the leveling plate 20 The clamping member 25 is connected. Thereby, the flat plate 18 and the leveling board 20 are hold | maintained at the attitude | position lifted upwards.

〔別実施形態〕
〔１〕前述の実施形態における金属板２７は、平板１８の横方向中央部を上下方向全体に亘って支持可能に構成してあれば良い。従って例えば、その上辺部分２７ａ及び下辺部分２７ｂのうちの少なくともいずれか備えていない構成としても良い。
〔２〕前述の実施形態における挟持部材２５を平板１８の横方向中央部に設け、被挟持部材を整地板２０の横方向中央部に設けても良い。
〔３〕前述の実施形態におけるピン部材３４を、抵抗棒１２に設け、ピン孔１５ａを金属板２７に設ける構成としても良い。また、前述の実施形態のように、ピン部材３４及びピン孔１５ａが、金属板２７及び抵抗棒１２の一方及び他方のそれぞれの下端に設けられている構成に限定されるものではなく、ピン部材３４及びピン孔１５ａが、金属板２７及び抵抗棒１２の一方及び他方のそれぞれの中間部等に設けられている構成としても良い。
〔４〕前述の実施形態における抵抗棒１２の代わりに、高さ変更可能な尾輪を設ける構成としても良い。
〔５〕前述の実施形態における支持部材２７を、平板１８の前面（裏面）に取り付けるようにしても良い。
〔６〕前述の実施形態における平板１８を、ヒンジ部材２６を使用せずにカバー１１に直接取り付けて、支持部材２７を当該平板１８に取り付けるようにしても良い。 [Another embodiment]
[1] The metal plate 27 in the above-described embodiment may be configured to be able to support the central portion in the horizontal direction of the flat plate 18 over the entire vertical direction. Therefore, for example, a configuration in which at least one of the upper side portion 27a and the lower side portion 27b is not provided may be employed.
[2] The clamping member 25 in the above-described embodiment may be provided in the central portion in the horizontal direction of the flat plate 18, and the clamped member may be provided in the central portion in the horizontal direction of the leveling plate 20.
[3] The pin member 34 in the above-described embodiment may be provided in the resistance rod 12 and the pin hole 15a may be provided in the metal plate 27. Further, as in the above-described embodiment, the pin member 34 and the pin hole 15a are not limited to the configuration provided at the lower ends of one and the other of the metal plate 27 and the resistance rod 12, but the pin member 34 and the pin hole 15a are good also as a structure provided in the intermediate part etc. of one side and the other of the metal plate 27 and the resistance rod 12, respectively.
[4] Instead of the resistance rod 12 in the above-described embodiment, a structure may be provided in which a tail wheel whose height can be changed is provided.
[5] The support member 27 in the above-described embodiment may be attached to the front surface (back surface) of the flat plate 18.
[6] The flat plate 18 in the above-described embodiment may be directly attached to the cover 11 without using the hinge member 26, and the support member 27 may be attached to the flat plate 18.

本発明は、走行用の車輪とロータリ耕耘装置とを別々に備えた歩行型作業機ばかりではなく、走行用の車輪を廃止し、右及び左の車軸に正逆転爪を連結してロータリ耕耘装置を構成した歩行型作業機や、乗用型のトラクタに装備されるロータリ耕耘装置としても有用である。 The present invention eliminates not only a walk-type work machine provided with a traveling wheel and a rotary tiller separately, but also eliminates the traveling wheel and connects forward and reverse claws to the right and left axles to rotate the rotary tiller. It is also useful as a rotary plowing device equipped on a walking type working machine configured as above or a riding type tractor.

１０正逆転爪（耕耘爪）
１１カバー
１４ａ第１フック部（保持手段）
１５ａピン孔(連結手段)
１８平板
２０整地板
２４フック部材（保持手段）
２５挟持部材(接続手段)
２６ヒンジ部材
２７ｂ下辺部分（横方向中央部）
２８被挟持部材（接続手段）
３２ダルマ孔
３２ａ小径孔部
３２ｂ大径孔部
３３頭付きピン
３４ピン部材(連結手段)
10 Forward / Reverse Claw (Tilling Claw)
11 Cover 14a First hook part (holding means)
15a Pin hole (connecting means)
18 Flat plate 20 Leveling plate 24 Hook member (holding means)
25 Clamping member (connection means)
26 Hinge member 27b Lower side portion (lateral center)
28 Clamped member (connection means)
32 Dharma hole 32a Small diameter hole 32b Large diameter hole 33 Head pin 34 Pin member (connecting means)

Claims

It has flexibility and its upper end is connected to the cover via a hinge member provided at the rear end of the cover that covers the top of the tilling nail , and is supported so as to be swingable up and down with respect to the cover. A flat plate,
A hard leveling plate disposed behind the flat plate and having an upper end connected to the cover via the hinge member and supported so as to swing up and down with respect to the cover ;
And a holding means for releasably holding the front Symbol leveling plate position spaced rearward or upward from the flat plate,
A rotary tilling device in which connecting means for releasably connecting the flat plate and the leveling plate is provided across the flat plate and the leveling plate at a position away from the hinge member .

A flat plate that is flexible and has an upper end connected to a rear end of a cover that covers the top of the tilling nail so as to swing up and down;
A hard leveling plate disposed behind the flat plate and connected to the rear end of the cover so as to swing up and down;
Connection means for releasably connecting the flat plate and the leveling plate;
Holding means for releasably holding the leveling plate in a posture separated rearward or upward from the flat plate,
The connecting means is a clamping member provided at one of the horizontal center of the flat plate and the horizontal central of the leveling plate, and the other of the horizontal central portion of the flat plate and the horizontal central portion of the leveling plate and a nipped member provided on the structure and tear Carlo Tari plow as said ground leveling plate and the flat plate is connected by the clamping member is clamped to the nipped member.

A dharma hole in which a small diameter hole portion and a large diameter hole portion are connected to each upper part of the right end and the left end of the flat plate so that the small diameter hole portion of the dharma hole is disposed on the lateral center side of the flat plate. Providing a headed pin upright on each of the right end and the left end of the leveling plate, inserting the head of the headed pin from the large diameter hole portion of the Dharma hole, The rotary tiller according to claim 2, wherein the upper portions of the right end and the left end of the flat plate are fixed to the upper portions of the right end and the left end of the leveling plate, respectively, by being locked to the portion.

The connecting means is switchable between a restricting state for restricting the lateral central portion of the flat plate from moving to the rear of the cover and a releasing state for allowing the lateral central portion to move to the rear of the cover. The rotary tiller of any one of Claims 1-3.